diff options
Diffstat (limited to 'fs/smb/server/smb2pdu.c')
| -rw-r--r-- | fs/smb/server/smb2pdu.c | 8607 |
1 files changed, 8607 insertions, 0 deletions
diff --git a/fs/smb/server/smb2pdu.c b/fs/smb/server/smb2pdu.c new file mode 100644 index 000000000000..717bcd20545b --- /dev/null +++ b/fs/smb/server/smb2pdu.c @@ -0,0 +1,8607 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * Copyright (C) 2016 Namjae Jeon <linkinjeon@kernel.org> + * Copyright (C) 2018 Samsung Electronics Co., Ltd. + */ + +#include <linux/inetdevice.h> +#include <net/addrconf.h> +#include <linux/syscalls.h> +#include <linux/namei.h> +#include <linux/statfs.h> +#include <linux/ethtool.h> +#include <linux/falloc.h> +#include <linux/mount.h> +#include <linux/filelock.h> + +#include "glob.h" +#include "smbfsctl.h" +#include "oplock.h" +#include "smbacl.h" + +#include "auth.h" +#include "asn1.h" +#include "connection.h" +#include "transport_ipc.h" +#include "transport_rdma.h" +#include "vfs.h" +#include "vfs_cache.h" +#include "misc.h" + +#include "server.h" +#include "smb_common.h" +#include "smbstatus.h" +#include "ksmbd_work.h" +#include "mgmt/user_config.h" +#include "mgmt/share_config.h" +#include "mgmt/tree_connect.h" +#include "mgmt/user_session.h" +#include "mgmt/ksmbd_ida.h" +#include "ndr.h" + +static void __wbuf(struct ksmbd_work *work, void **req, void **rsp) +{ + if (work->next_smb2_rcv_hdr_off) { + *req = ksmbd_req_buf_next(work); + *rsp = ksmbd_resp_buf_next(work); + } else { + *req = smb2_get_msg(work->request_buf); + *rsp = smb2_get_msg(work->response_buf); + } +} + +#define WORK_BUFFERS(w, rq, rs) __wbuf((w), (void **)&(rq), (void **)&(rs)) + +/** + * check_session_id() - check for valid session id in smb header + * @conn: connection instance + * @id: session id from smb header + * + * Return: 1 if valid session id, otherwise 0 + */ +static inline bool check_session_id(struct ksmbd_conn *conn, u64 id) +{ + struct ksmbd_session *sess; + + if (id == 0 || id == -1) + return false; + + sess = ksmbd_session_lookup_all(conn, id); + if (sess) + return true; + pr_err("Invalid user session id: %llu\n", id); + return false; +} + +struct channel *lookup_chann_list(struct ksmbd_session *sess, struct ksmbd_conn *conn) +{ + return xa_load(&sess->ksmbd_chann_list, (long)conn); +} + +/** + * smb2_get_ksmbd_tcon() - get tree connection information using a tree id. + * @work: smb work + * + * Return: 0 if there is a tree connection matched or these are + * skipable commands, otherwise error + */ +int smb2_get_ksmbd_tcon(struct ksmbd_work *work) +{ + struct smb2_hdr *req_hdr = smb2_get_msg(work->request_buf); + unsigned int cmd = le16_to_cpu(req_hdr->Command); + int tree_id; + + work->tcon = NULL; + if (cmd == SMB2_TREE_CONNECT_HE || + cmd == SMB2_CANCEL_HE || + cmd == SMB2_LOGOFF_HE) { + ksmbd_debug(SMB, "skip to check tree connect request\n"); + return 0; + } + + if (xa_empty(&work->sess->tree_conns)) { + ksmbd_debug(SMB, "NO tree connected\n"); + return -ENOENT; + } + + tree_id = le32_to_cpu(req_hdr->Id.SyncId.TreeId); + work->tcon = ksmbd_tree_conn_lookup(work->sess, tree_id); + if (!work->tcon) { + pr_err("Invalid tid %d\n", tree_id); + return -EINVAL; + } + + return 1; +} + +/** + * smb2_set_err_rsp() - set error response code on smb response + * @work: smb work containing response buffer + */ +void smb2_set_err_rsp(struct ksmbd_work *work) +{ + struct smb2_err_rsp *err_rsp; + + if (work->next_smb2_rcv_hdr_off) + err_rsp = ksmbd_resp_buf_next(work); + else + err_rsp = smb2_get_msg(work->response_buf); + + if (err_rsp->hdr.Status != STATUS_STOPPED_ON_SYMLINK) { + err_rsp->StructureSize = SMB2_ERROR_STRUCTURE_SIZE2_LE; + err_rsp->ErrorContextCount = 0; + err_rsp->Reserved = 0; + err_rsp->ByteCount = 0; + err_rsp->ErrorData[0] = 0; + inc_rfc1001_len(work->response_buf, SMB2_ERROR_STRUCTURE_SIZE2); + } +} + +/** + * is_smb2_neg_cmd() - is it smb2 negotiation command + * @work: smb work containing smb header + * + * Return: true if smb2 negotiation command, otherwise false + */ +bool is_smb2_neg_cmd(struct ksmbd_work *work) +{ + struct smb2_hdr *hdr = smb2_get_msg(work->request_buf); + + /* is it SMB2 header ? */ + if (hdr->ProtocolId != SMB2_PROTO_NUMBER) + return false; + + /* make sure it is request not response message */ + if (hdr->Flags & SMB2_FLAGS_SERVER_TO_REDIR) + return false; + + if (hdr->Command != SMB2_NEGOTIATE) + return false; + + return true; +} + +/** + * is_smb2_rsp() - is it smb2 response + * @work: smb work containing smb response buffer + * + * Return: true if smb2 response, otherwise false + */ +bool is_smb2_rsp(struct ksmbd_work *work) +{ + struct smb2_hdr *hdr = smb2_get_msg(work->response_buf); + + /* is it SMB2 header ? */ + if (hdr->ProtocolId != SMB2_PROTO_NUMBER) + return false; + + /* make sure it is response not request message */ + if (!(hdr->Flags & SMB2_FLAGS_SERVER_TO_REDIR)) + return false; + + return true; +} + +/** + * get_smb2_cmd_val() - get smb command code from smb header + * @work: smb work containing smb request buffer + * + * Return: smb2 request command value + */ +u16 get_smb2_cmd_val(struct ksmbd_work *work) +{ + struct smb2_hdr *rcv_hdr; + + if (work->next_smb2_rcv_hdr_off) + rcv_hdr = ksmbd_req_buf_next(work); + else + rcv_hdr = smb2_get_msg(work->request_buf); + return le16_to_cpu(rcv_hdr->Command); +} + +/** + * set_smb2_rsp_status() - set error response code on smb2 header + * @work: smb work containing response buffer + * @err: error response code + */ +void set_smb2_rsp_status(struct ksmbd_work *work, __le32 err) +{ + struct smb2_hdr *rsp_hdr; + + if (work->next_smb2_rcv_hdr_off) + rsp_hdr = ksmbd_resp_buf_next(work); + else + rsp_hdr = smb2_get_msg(work->response_buf); + rsp_hdr->Status = err; + smb2_set_err_rsp(work); +} + +/** + * init_smb2_neg_rsp() - initialize smb2 response for negotiate command + * @work: smb work containing smb request buffer + * + * smb2 negotiate response is sent in reply of smb1 negotiate command for + * dialect auto-negotiation. + */ +int init_smb2_neg_rsp(struct ksmbd_work *work) +{ + struct smb2_hdr *rsp_hdr; + struct smb2_negotiate_rsp *rsp; + struct ksmbd_conn *conn = work->conn; + + *(__be32 *)work->response_buf = + cpu_to_be32(conn->vals->header_size); + + rsp_hdr = smb2_get_msg(work->response_buf); + memset(rsp_hdr, 0, sizeof(struct smb2_hdr) + 2); + rsp_hdr->ProtocolId = SMB2_PROTO_NUMBER; + rsp_hdr->StructureSize = SMB2_HEADER_STRUCTURE_SIZE; + rsp_hdr->CreditRequest = cpu_to_le16(2); + rsp_hdr->Command = SMB2_NEGOTIATE; + rsp_hdr->Flags = (SMB2_FLAGS_SERVER_TO_REDIR); + rsp_hdr->NextCommand = 0; + rsp_hdr->MessageId = 0; + rsp_hdr->Id.SyncId.ProcessId = 0; + rsp_hdr->Id.SyncId.TreeId = 0; + rsp_hdr->SessionId = 0; + memset(rsp_hdr->Signature, 0, 16); + + rsp = smb2_get_msg(work->response_buf); + + WARN_ON(ksmbd_conn_good(conn)); + + rsp->StructureSize = cpu_to_le16(65); + ksmbd_debug(SMB, "conn->dialect 0x%x\n", conn->dialect); + rsp->DialectRevision = cpu_to_le16(conn->dialect); + /* Not setting conn guid rsp->ServerGUID, as it + * not used by client for identifying connection + */ + rsp->Capabilities = cpu_to_le32(conn->vals->capabilities); + /* Default Max Message Size till SMB2.0, 64K*/ + rsp->MaxTransactSize = cpu_to_le32(conn->vals->max_trans_size); + rsp->MaxReadSize = cpu_to_le32(conn->vals->max_read_size); + rsp->MaxWriteSize = cpu_to_le32(conn->vals->max_write_size); + + rsp->SystemTime = cpu_to_le64(ksmbd_systime()); + rsp->ServerStartTime = 0; + + rsp->SecurityBufferOffset = cpu_to_le16(128); + rsp->SecurityBufferLength = cpu_to_le16(AUTH_GSS_LENGTH); + ksmbd_copy_gss_neg_header((char *)(&rsp->hdr) + + le16_to_cpu(rsp->SecurityBufferOffset)); + inc_rfc1001_len(work->response_buf, + sizeof(struct smb2_negotiate_rsp) - + sizeof(struct smb2_hdr) + AUTH_GSS_LENGTH); + rsp->SecurityMode = SMB2_NEGOTIATE_SIGNING_ENABLED_LE; + if (server_conf.signing == KSMBD_CONFIG_OPT_MANDATORY) + rsp->SecurityMode |= SMB2_NEGOTIATE_SIGNING_REQUIRED_LE; + conn->use_spnego = true; + + ksmbd_conn_set_need_negotiate(conn); + return 0; +} + +/** + * smb2_set_rsp_credits() - set number of credits in response buffer + * @work: smb work containing smb response buffer + */ +int smb2_set_rsp_credits(struct ksmbd_work *work) +{ + struct smb2_hdr *req_hdr = ksmbd_req_buf_next(work); + struct smb2_hdr *hdr = ksmbd_resp_buf_next(work); + struct ksmbd_conn *conn = work->conn; + unsigned short credits_requested, aux_max; + unsigned short credit_charge, credits_granted = 0; + + if (work->send_no_response) + return 0; + + hdr->CreditCharge = req_hdr->CreditCharge; + + if (conn->total_credits > conn->vals->max_credits) { + hdr->CreditRequest = 0; + pr_err("Total credits overflow: %d\n", conn->total_credits); + return -EINVAL; + } + + credit_charge = max_t(unsigned short, + le16_to_cpu(req_hdr->CreditCharge), 1); + if (credit_charge > conn->total_credits) { + ksmbd_debug(SMB, "Insufficient credits granted, given: %u, granted: %u\n", + credit_charge, conn->total_credits); + return -EINVAL; + } + + conn->total_credits -= credit_charge; + conn->outstanding_credits -= credit_charge; + credits_requested = max_t(unsigned short, + le16_to_cpu(req_hdr->CreditRequest), 1); + + /* according to smb2.credits smbtorture, Windows server + * 2016 or later grant up to 8192 credits at once. + * + * TODO: Need to adjuct CreditRequest value according to + * current cpu load + */ + if (hdr->Command == SMB2_NEGOTIATE) + aux_max = 1; + else + aux_max = conn->vals->max_credits - credit_charge; + credits_granted = min_t(unsigned short, credits_requested, aux_max); + + if (conn->vals->max_credits - conn->total_credits < credits_granted) + credits_granted = conn->vals->max_credits - + conn->total_credits; + + conn->total_credits += credits_granted; + work->credits_granted += credits_granted; + + if (!req_hdr->NextCommand) { + /* Update CreditRequest in last request */ + hdr->CreditRequest = cpu_to_le16(work->credits_granted); + } + ksmbd_debug(SMB, + "credits: requested[%d] granted[%d] total_granted[%d]\n", + credits_requested, credits_granted, + conn->total_credits); + return 0; +} + +/** + * init_chained_smb2_rsp() - initialize smb2 chained response + * @work: smb work containing smb response buffer + */ +static void init_chained_smb2_rsp(struct ksmbd_work *work) +{ + struct smb2_hdr *req = ksmbd_req_buf_next(work); + struct smb2_hdr *rsp = ksmbd_resp_buf_next(work); + struct smb2_hdr *rsp_hdr; + struct smb2_hdr *rcv_hdr; + int next_hdr_offset = 0; + int len, new_len; + + /* Len of this response = updated RFC len - offset of previous cmd + * in the compound rsp + */ + + /* Storing the current local FID which may be needed by subsequent + * command in the compound request + */ + if (req->Command == SMB2_CREATE && rsp->Status == STATUS_SUCCESS) { + work->compound_fid = ((struct smb2_create_rsp *)rsp)->VolatileFileId; + work->compound_pfid = ((struct smb2_create_rsp *)rsp)->PersistentFileId; + work->compound_sid = le64_to_cpu(rsp->SessionId); + } + + len = get_rfc1002_len(work->response_buf) - work->next_smb2_rsp_hdr_off; + next_hdr_offset = le32_to_cpu(req->NextCommand); + + new_len = ALIGN(len, 8); + inc_rfc1001_len(work->response_buf, + sizeof(struct smb2_hdr) + new_len - len); + rsp->NextCommand = cpu_to_le32(new_len); + + work->next_smb2_rcv_hdr_off += next_hdr_offset; + work->next_smb2_rsp_hdr_off += new_len; + ksmbd_debug(SMB, + "Compound req new_len = %d rcv off = %d rsp off = %d\n", + new_len, work->next_smb2_rcv_hdr_off, + work->next_smb2_rsp_hdr_off); + + rsp_hdr = ksmbd_resp_buf_next(work); + rcv_hdr = ksmbd_req_buf_next(work); + + if (!(rcv_hdr->Flags & SMB2_FLAGS_RELATED_OPERATIONS)) { + ksmbd_debug(SMB, "related flag should be set\n"); + work->compound_fid = KSMBD_NO_FID; + work->compound_pfid = KSMBD_NO_FID; + } + memset((char *)rsp_hdr, 0, sizeof(struct smb2_hdr) + 2); + rsp_hdr->ProtocolId = SMB2_PROTO_NUMBER; + rsp_hdr->StructureSize = SMB2_HEADER_STRUCTURE_SIZE; + rsp_hdr->Command = rcv_hdr->Command; + + /* + * Message is response. We don't grant oplock yet. + */ + rsp_hdr->Flags = (SMB2_FLAGS_SERVER_TO_REDIR | + SMB2_FLAGS_RELATED_OPERATIONS); + rsp_hdr->NextCommand = 0; + rsp_hdr->MessageId = rcv_hdr->MessageId; + rsp_hdr->Id.SyncId.ProcessId = rcv_hdr->Id.SyncId.ProcessId; + rsp_hdr->Id.SyncId.TreeId = rcv_hdr->Id.SyncId.TreeId; + rsp_hdr->SessionId = rcv_hdr->SessionId; + memcpy(rsp_hdr->Signature, rcv_hdr->Signature, 16); +} + +/** + * is_chained_smb2_message() - check for chained command + * @work: smb work containing smb request buffer + * + * Return: true if chained request, otherwise false + */ +bool is_chained_smb2_message(struct ksmbd_work *work) +{ + struct smb2_hdr *hdr = smb2_get_msg(work->request_buf); + unsigned int len, next_cmd; + + if (hdr->ProtocolId != SMB2_PROTO_NUMBER) + return false; + + hdr = ksmbd_req_buf_next(work); + next_cmd = le32_to_cpu(hdr->NextCommand); + if (next_cmd > 0) { + if ((u64)work->next_smb2_rcv_hdr_off + next_cmd + + __SMB2_HEADER_STRUCTURE_SIZE > + get_rfc1002_len(work->request_buf)) { + pr_err("next command(%u) offset exceeds smb msg size\n", + next_cmd); + return false; + } + + if ((u64)get_rfc1002_len(work->response_buf) + MAX_CIFS_SMALL_BUFFER_SIZE > + work->response_sz) { + pr_err("next response offset exceeds response buffer size\n"); + return false; + } + + ksmbd_debug(SMB, "got SMB2 chained command\n"); + init_chained_smb2_rsp(work); + return true; + } else if (work->next_smb2_rcv_hdr_off) { + /* + * This is last request in chained command, + * align response to 8 byte + */ + len = ALIGN(get_rfc1002_len(work->response_buf), 8); + len = len - get_rfc1002_len(work->response_buf); + if (len) { + ksmbd_debug(SMB, "padding len %u\n", len); + inc_rfc1001_len(work->response_buf, len); + if (work->aux_payload_sz) + work->aux_payload_sz += len; + } + } + return false; +} + +/** + * init_smb2_rsp_hdr() - initialize smb2 response + * @work: smb work containing smb request buffer + * + * Return: 0 + */ +int init_smb2_rsp_hdr(struct ksmbd_work *work) +{ + struct smb2_hdr *rsp_hdr = smb2_get_msg(work->response_buf); + struct smb2_hdr *rcv_hdr = smb2_get_msg(work->request_buf); + struct ksmbd_conn *conn = work->conn; + + memset(rsp_hdr, 0, sizeof(struct smb2_hdr) + 2); + *(__be32 *)work->response_buf = + cpu_to_be32(conn->vals->header_size); + rsp_hdr->ProtocolId = rcv_hdr->ProtocolId; + rsp_hdr->StructureSize = SMB2_HEADER_STRUCTURE_SIZE; + rsp_hdr->Command = rcv_hdr->Command; + + /* + * Message is response. We don't grant oplock yet. + */ + rsp_hdr->Flags = (SMB2_FLAGS_SERVER_TO_REDIR); + rsp_hdr->NextCommand = 0; + rsp_hdr->MessageId = rcv_hdr->MessageId; + rsp_hdr->Id.SyncId.ProcessId = rcv_hdr->Id.SyncId.ProcessId; + rsp_hdr->Id.SyncId.TreeId = rcv_hdr->Id.SyncId.TreeId; + rsp_hdr->SessionId = rcv_hdr->SessionId; + memcpy(rsp_hdr->Signature, rcv_hdr->Signature, 16); + + return 0; +} + +/** + * smb2_allocate_rsp_buf() - allocate smb2 response buffer + * @work: smb work containing smb request buffer + * + * Return: 0 on success, otherwise -ENOMEM + */ +int smb2_allocate_rsp_buf(struct ksmbd_work *work) +{ + struct smb2_hdr *hdr = smb2_get_msg(work->request_buf); + size_t small_sz = MAX_CIFS_SMALL_BUFFER_SIZE; + size_t large_sz = small_sz + work->conn->vals->max_trans_size; + size_t sz = small_sz; + int cmd = le16_to_cpu(hdr->Command); + + if (cmd == SMB2_IOCTL_HE || cmd == SMB2_QUERY_DIRECTORY_HE) + sz = large_sz; + + if (cmd == SMB2_QUERY_INFO_HE) { + struct smb2_query_info_req *req; + + req = smb2_get_msg(work->request_buf); + if ((req->InfoType == SMB2_O_INFO_FILE && + (req->FileInfoClass == FILE_FULL_EA_INFORMATION || + req->FileInfoClass == FILE_ALL_INFORMATION)) || + req->InfoType == SMB2_O_INFO_SECURITY) + sz = large_sz; + } + + /* allocate large response buf for chained commands */ + if (le32_to_cpu(hdr->NextCommand) > 0) + sz = large_sz; + + work->response_buf = kvmalloc(sz, GFP_KERNEL | __GFP_ZERO); + if (!work->response_buf) + return -ENOMEM; + + work->response_sz = sz; + return 0; +} + +/** + * smb2_check_user_session() - check for valid session for a user + * @work: smb work containing smb request buffer + * + * Return: 0 on success, otherwise error + */ +int smb2_check_user_session(struct ksmbd_work *work) +{ + struct smb2_hdr *req_hdr = smb2_get_msg(work->request_buf); + struct ksmbd_conn *conn = work->conn; + unsigned int cmd = conn->ops->get_cmd_val(work); + unsigned long long sess_id; + + work->sess = NULL; + /* + * SMB2_ECHO, SMB2_NEGOTIATE, SMB2_SESSION_SETUP command do not + * require a session id, so no need to validate user session's for + * these commands. + */ + if (cmd == SMB2_ECHO_HE || cmd == SMB2_NEGOTIATE_HE || + cmd == SMB2_SESSION_SETUP_HE) + return 0; + + if (!ksmbd_conn_good(conn)) + return -EINVAL; + + sess_id = le64_to_cpu(req_hdr->SessionId); + /* Check for validity of user session */ + work->sess = ksmbd_session_lookup_all(conn, sess_id); + if (work->sess) + return 1; + ksmbd_debug(SMB, "Invalid user session, Uid %llu\n", sess_id); + return -EINVAL; +} + +static void destroy_previous_session(struct ksmbd_conn *conn, + struct ksmbd_user *user, u64 id) +{ + struct ksmbd_session *prev_sess = ksmbd_session_lookup_slowpath(id); + struct ksmbd_user *prev_user; + struct channel *chann; + long index; + + if (!prev_sess) + return; + + prev_user = prev_sess->user; + + if (!prev_user || + strcmp(user->name, prev_user->name) || + user->passkey_sz != prev_user->passkey_sz || + memcmp(user->passkey, prev_user->passkey, user->passkey_sz)) + return; + + prev_sess->state = SMB2_SESSION_EXPIRED; + xa_for_each(&prev_sess->ksmbd_chann_list, index, chann) + ksmbd_conn_set_exiting(chann->conn); +} + +/** + * smb2_get_name() - get filename string from on the wire smb format + * @src: source buffer + * @maxlen: maxlen of source string + * @local_nls: nls_table pointer + * + * Return: matching converted filename on success, otherwise error ptr + */ +static char * +smb2_get_name(const char *src, const int maxlen, struct nls_table *local_nls) +{ + char *name; + + name = smb_strndup_from_utf16(src, maxlen, 1, local_nls); + if (IS_ERR(name)) { + pr_err("failed to get name %ld\n", PTR_ERR(name)); + return name; + } + + ksmbd_conv_path_to_unix(name); + ksmbd_strip_last_slash(name); + return name; +} + +int setup_async_work(struct ksmbd_work *work, void (*fn)(void **), void **arg) +{ + struct smb2_hdr *rsp_hdr; + struct ksmbd_conn *conn = work->conn; + int id; + + rsp_hdr = smb2_get_msg(work->response_buf); + rsp_hdr->Flags |= SMB2_FLAGS_ASYNC_COMMAND; + + id = ksmbd_acquire_async_msg_id(&conn->async_ida); + if (id < 0) { + pr_err("Failed to alloc async message id\n"); + return id; + } + work->asynchronous = true; + work->async_id = id; + rsp_hdr->Id.AsyncId = cpu_to_le64(id); + + ksmbd_debug(SMB, + "Send interim Response to inform async request id : %d\n", + work->async_id); + + work->cancel_fn = fn; + work->cancel_argv = arg; + + if (list_empty(&work->async_request_entry)) { + spin_lock(&conn->request_lock); + list_add_tail(&work->async_request_entry, &conn->async_requests); + spin_unlock(&conn->request_lock); + } + + return 0; +} + +void release_async_work(struct ksmbd_work *work) +{ + struct ksmbd_conn *conn = work->conn; + + spin_lock(&conn->request_lock); + list_del_init(&work->async_request_entry); + spin_unlock(&conn->request_lock); + + work->asynchronous = 0; + work->cancel_fn = NULL; + kfree(work->cancel_argv); + work->cancel_argv = NULL; + if (work->async_id) { + ksmbd_release_id(&conn->async_ida, work->async_id); + work->async_id = 0; + } +} + +void smb2_send_interim_resp(struct ksmbd_work *work, __le32 status) +{ + struct smb2_hdr *rsp_hdr; + + rsp_hdr = smb2_get_msg(work->response_buf); + smb2_set_err_rsp(work); + rsp_hdr->Status = status; + + work->multiRsp = 1; + ksmbd_conn_write(work); + rsp_hdr->Status = 0; + work->multiRsp = 0; +} + +static __le32 smb2_get_reparse_tag_special_file(umode_t mode) +{ + if (S_ISDIR(mode) || S_ISREG(mode)) + return 0; + + if (S_ISLNK(mode)) + return IO_REPARSE_TAG_LX_SYMLINK_LE; + else if (S_ISFIFO(mode)) + return IO_REPARSE_TAG_LX_FIFO_LE; + else if (S_ISSOCK(mode)) + return IO_REPARSE_TAG_AF_UNIX_LE; + else if (S_ISCHR(mode)) + return IO_REPARSE_TAG_LX_CHR_LE; + else if (S_ISBLK(mode)) + return IO_REPARSE_TAG_LX_BLK_LE; + + return 0; +} + +/** + * smb2_get_dos_mode() - get file mode in dos format from unix mode + * @stat: kstat containing file mode + * @attribute: attribute flags + * + * Return: converted dos mode + */ +static int smb2_get_dos_mode(struct kstat *stat, int attribute) +{ + int attr = 0; + + if (S_ISDIR(stat->mode)) { + attr = FILE_ATTRIBUTE_DIRECTORY | + (attribute & (FILE_ATTRIBUTE_HIDDEN | FILE_ATTRIBUTE_SYSTEM)); + } else { + attr = (attribute & 0x00005137) | FILE_ATTRIBUTE_ARCHIVE; + attr &= ~(FILE_ATTRIBUTE_DIRECTORY); + if (S_ISREG(stat->mode) && (server_conf.share_fake_fscaps & + FILE_SUPPORTS_SPARSE_FILES)) + attr |= FILE_ATTRIBUTE_SPARSE_FILE; + + if (smb2_get_reparse_tag_special_file(stat->mode)) + attr |= FILE_ATTRIBUTE_REPARSE_POINT; + } + + return attr; +} + +static void build_preauth_ctxt(struct smb2_preauth_neg_context *pneg_ctxt, + __le16 hash_id) +{ + pneg_ctxt->ContextType = SMB2_PREAUTH_INTEGRITY_CAPABILITIES; + pneg_ctxt->DataLength = cpu_to_le16(38); + pneg_ctxt->HashAlgorithmCount = cpu_to_le16(1); + pneg_ctxt->Reserved = cpu_to_le32(0); + pneg_ctxt->SaltLength = cpu_to_le16(SMB311_SALT_SIZE); + get_random_bytes(pneg_ctxt->Salt, SMB311_SALT_SIZE); + pneg_ctxt->HashAlgorithms = hash_id; +} + +static void build_encrypt_ctxt(struct smb2_encryption_neg_context *pneg_ctxt, + __le16 cipher_type) +{ + pneg_ctxt->ContextType = SMB2_ENCRYPTION_CAPABILITIES; + pneg_ctxt->DataLength = cpu_to_le16(4); + pneg_ctxt->Reserved = cpu_to_le32(0); + pneg_ctxt->CipherCount = cpu_to_le16(1); + pneg_ctxt->Ciphers[0] = cipher_type; +} + +static void build_sign_cap_ctxt(struct smb2_signing_capabilities *pneg_ctxt, + __le16 sign_algo) +{ + pneg_ctxt->ContextType = SMB2_SIGNING_CAPABILITIES; + pneg_ctxt->DataLength = + cpu_to_le16((sizeof(struct smb2_signing_capabilities) + 2) + - sizeof(struct smb2_neg_context)); + pneg_ctxt->Reserved = cpu_to_le32(0); + pneg_ctxt->SigningAlgorithmCount = cpu_to_le16(1); + pneg_ctxt->SigningAlgorithms[0] = sign_algo; +} + +static void build_posix_ctxt(struct smb2_posix_neg_context *pneg_ctxt) +{ + pneg_ctxt->ContextType = SMB2_POSIX_EXTENSIONS_AVAILABLE; + pneg_ctxt->DataLength = cpu_to_le16(POSIX_CTXT_DATA_LEN); + /* SMB2_CREATE_TAG_POSIX is "0x93AD25509CB411E7B42383DE968BCD7C" */ + pneg_ctxt->Name[0] = 0x93; + pneg_ctxt->Name[1] = 0xAD; + pneg_ctxt->Name[2] = 0x25; + pneg_ctxt->Name[3] = 0x50; + pneg_ctxt->Name[4] = 0x9C; + pneg_ctxt->Name[5] = 0xB4; + pneg_ctxt->Name[6] = 0x11; + pneg_ctxt->Name[7] = 0xE7; + pneg_ctxt->Name[8] = 0xB4; + pneg_ctxt->Name[9] = 0x23; + pneg_ctxt->Name[10] = 0x83; + pneg_ctxt->Name[11] = 0xDE; + pneg_ctxt->Name[12] = 0x96; + pneg_ctxt->Name[13] = 0x8B; + pneg_ctxt->Name[14] = 0xCD; + pneg_ctxt->Name[15] = 0x7C; +} + +static void assemble_neg_contexts(struct ksmbd_conn *conn, + struct smb2_negotiate_rsp *rsp, + void *smb2_buf_len) +{ + char * const pneg_ctxt = (char *)rsp + + le32_to_cpu(rsp->NegotiateContextOffset); + int neg_ctxt_cnt = 1; + int ctxt_size; + + ksmbd_debug(SMB, + "assemble SMB2_PREAUTH_INTEGRITY_CAPABILITIES context\n"); + build_preauth_ctxt((struct smb2_preauth_neg_context *)pneg_ctxt, + conn->preauth_info->Preauth_HashId); + inc_rfc1001_len(smb2_buf_len, AUTH_GSS_PADDING); + ctxt_size = sizeof(struct smb2_preauth_neg_context); + + if (conn->cipher_type) { + /* Round to 8 byte boundary */ + ctxt_size = round_up(ctxt_size, 8); + ksmbd_debug(SMB, + "assemble SMB2_ENCRYPTION_CAPABILITIES context\n"); + build_encrypt_ctxt((struct smb2_encryption_neg_context *) + (pneg_ctxt + ctxt_size), + conn->cipher_type); + neg_ctxt_cnt++; + ctxt_size += sizeof(struct smb2_encryption_neg_context) + 2; + } + + /* compression context not yet supported */ + WARN_ON(conn->compress_algorithm != SMB3_COMPRESS_NONE); + + if (conn->posix_ext_supported) { + ctxt_size = round_up(ctxt_size, 8); + ksmbd_debug(SMB, + "assemble SMB2_POSIX_EXTENSIONS_AVAILABLE context\n"); + build_posix_ctxt((struct smb2_posix_neg_context *) + (pneg_ctxt + ctxt_size)); + neg_ctxt_cnt++; + ctxt_size += sizeof(struct smb2_posix_neg_context); + } + + if (conn->signing_negotiated) { + ctxt_size = round_up(ctxt_size, 8); + ksmbd_debug(SMB, + "assemble SMB2_SIGNING_CAPABILITIES context\n"); + build_sign_cap_ctxt((struct smb2_signing_capabilities *) + (pneg_ctxt + ctxt_size), + conn->signing_algorithm); + neg_ctxt_cnt++; + ctxt_size += sizeof(struct smb2_signing_capabilities) + 2; + } + + rsp->NegotiateContextCount = cpu_to_le16(neg_ctxt_cnt); + inc_rfc1001_len(smb2_buf_len, ctxt_size); +} + +static __le32 decode_preauth_ctxt(struct ksmbd_conn *conn, + struct smb2_preauth_neg_context *pneg_ctxt, + int len_of_ctxts) +{ + /* + * sizeof(smb2_preauth_neg_context) assumes SMB311_SALT_SIZE Salt, + * which may not be present. Only check for used HashAlgorithms[1]. + */ + if (len_of_ctxts < MIN_PREAUTH_CTXT_DATA_LEN) + return STATUS_INVALID_PARAMETER; + + if (pneg_ctxt->HashAlgorithms != SMB2_PREAUTH_INTEGRITY_SHA512) + return STATUS_NO_PREAUTH_INTEGRITY_HASH_OVERLAP; + + conn->preauth_info->Preauth_HashId = SMB2_PREAUTH_INTEGRITY_SHA512; + return STATUS_SUCCESS; +} + +static void decode_encrypt_ctxt(struct ksmbd_conn *conn, + struct smb2_encryption_neg_context *pneg_ctxt, + int len_of_ctxts) +{ + int cph_cnt = le16_to_cpu(pneg_ctxt->CipherCount); + int i, cphs_size = cph_cnt * sizeof(__le16); + + conn->cipher_type = 0; + + if (sizeof(struct smb2_encryption_neg_context) + cphs_size > + len_of_ctxts) { + pr_err("Invalid cipher count(%d)\n", cph_cnt); + return; + } + + if (server_conf.flags & KSMBD_GLOBAL_FLAG_SMB2_ENCRYPTION_OFF) + return; + + for (i = 0; i < cph_cnt; i++) { + if (pneg_ctxt->Ciphers[i] == SMB2_ENCRYPTION_AES128_GCM || + pneg_ctxt->Ciphers[i] == SMB2_ENCRYPTION_AES128_CCM || + pneg_ctxt->Ciphers[i] == SMB2_ENCRYPTION_AES256_CCM || + pneg_ctxt->Ciphers[i] == SMB2_ENCRYPTION_AES256_GCM) { + ksmbd_debug(SMB, "Cipher ID = 0x%x\n", + pneg_ctxt->Ciphers[i]); + conn->cipher_type = pneg_ctxt->Ciphers[i]; + break; + } + } +} + +/** + * smb3_encryption_negotiated() - checks if server and client agreed on enabling encryption + * @conn: smb connection + * + * Return: true if connection should be encrypted, else false + */ +bool smb3_encryption_negotiated(struct ksmbd_conn *conn) +{ + if (!conn->ops->generate_encryptionkey) + return false; + + /* + * SMB 3.0 and 3.0.2 dialects use the SMB2_GLOBAL_CAP_ENCRYPTION flag. + * SMB 3.1.1 uses the cipher_type field. + */ + return (conn->vals->capabilities & SMB2_GLOBAL_CAP_ENCRYPTION) || + conn->cipher_type; +} + +static void decode_compress_ctxt(struct ksmbd_conn *conn, + struct smb2_compression_capabilities_context *pneg_ctxt) +{ + conn->compress_algorithm = SMB3_COMPRESS_NONE; +} + +static void decode_sign_cap_ctxt(struct ksmbd_conn *conn, + struct smb2_signing_capabilities *pneg_ctxt, + int len_of_ctxts) +{ + int sign_algo_cnt = le16_to_cpu(pneg_ctxt->SigningAlgorithmCount); + int i, sign_alos_size = sign_algo_cnt * sizeof(__le16); + + conn->signing_negotiated = false; + + if (sizeof(struct smb2_signing_capabilities) + sign_alos_size > + len_of_ctxts) { + pr_err("Invalid signing algorithm count(%d)\n", sign_algo_cnt); + return; + } + + for (i = 0; i < sign_algo_cnt; i++) { + if (pneg_ctxt->SigningAlgorithms[i] == SIGNING_ALG_HMAC_SHA256_LE || + pneg_ctxt->SigningAlgorithms[i] == SIGNING_ALG_AES_CMAC_LE) { + ksmbd_debug(SMB, "Signing Algorithm ID = 0x%x\n", + pneg_ctxt->SigningAlgorithms[i]); + conn->signing_negotiated = true; + conn->signing_algorithm = + pneg_ctxt->SigningAlgorithms[i]; + break; + } + } +} + +static __le32 deassemble_neg_contexts(struct ksmbd_conn *conn, + struct smb2_negotiate_req *req, + int len_of_smb) +{ + /* +4 is to account for the RFC1001 len field */ + struct smb2_neg_context *pctx = (struct smb2_neg_context *)req; + int i = 0, len_of_ctxts; + int offset = le32_to_cpu(req->NegotiateContextOffset); + int neg_ctxt_cnt = le16_to_cpu(req->NegotiateContextCount); + __le32 status = STATUS_INVALID_PARAMETER; + + ksmbd_debug(SMB, "decoding %d negotiate contexts\n", neg_ctxt_cnt); + if (len_of_smb <= offset) { + ksmbd_debug(SMB, "Invalid response: negotiate context offset\n"); + return status; + } + + len_of_ctxts = len_of_smb - offset; + + while (i++ < neg_ctxt_cnt) { + int clen; + + /* check that offset is not beyond end of SMB */ + if (len_of_ctxts == 0) + break; + + if (len_of_ctxts < sizeof(struct smb2_neg_context)) + break; + + pctx = (struct smb2_neg_context *)((char *)pctx + offset); + clen = le16_to_cpu(pctx->DataLength); + if (clen + sizeof(struct smb2_neg_context) > len_of_ctxts) + break; + + if (pctx->ContextType == SMB2_PREAUTH_INTEGRITY_CAPABILITIES) { + ksmbd_debug(SMB, + "deassemble SMB2_PREAUTH_INTEGRITY_CAPABILITIES context\n"); + if (conn->preauth_info->Preauth_HashId) + break; + + status = decode_preauth_ctxt(conn, + (struct smb2_preauth_neg_context *)pctx, + len_of_ctxts); + if (status != STATUS_SUCCESS) + break; + } else if (pctx->ContextType == SMB2_ENCRYPTION_CAPABILITIES) { + ksmbd_debug(SMB, + "deassemble SMB2_ENCRYPTION_CAPABILITIES context\n"); + if (conn->cipher_type) + break; + + decode_encrypt_ctxt(conn, + (struct smb2_encryption_neg_context *)pctx, + len_of_ctxts); + } else if (pctx->ContextType == SMB2_COMPRESSION_CAPABILITIES) { + ksmbd_debug(SMB, + "deassemble SMB2_COMPRESSION_CAPABILITIES context\n"); + if (conn->compress_algorithm) + break; + + decode_compress_ctxt(conn, + (struct smb2_compression_capabilities_context *)pctx); + } else if (pctx->ContextType == SMB2_NETNAME_NEGOTIATE_CONTEXT_ID) { + ksmbd_debug(SMB, + "deassemble SMB2_NETNAME_NEGOTIATE_CONTEXT_ID context\n"); + } else if (pctx->ContextType == SMB2_POSIX_EXTENSIONS_AVAILABLE) { + ksmbd_debug(SMB, + "deassemble SMB2_POSIX_EXTENSIONS_AVAILABLE context\n"); + conn->posix_ext_supported = true; + } else if (pctx->ContextType == SMB2_SIGNING_CAPABILITIES) { + ksmbd_debug(SMB, + "deassemble SMB2_SIGNING_CAPABILITIES context\n"); + decode_sign_cap_ctxt(conn, + (struct smb2_signing_capabilities *)pctx, + len_of_ctxts); + } + + /* offsets must be 8 byte aligned */ + clen = (clen + 7) & ~0x7; + offset = clen + sizeof(struct smb2_neg_context); + len_of_ctxts -= clen + sizeof(struct smb2_neg_context); + } + return status; +} + +/** + * smb2_handle_negotiate() - handler for smb2 negotiate command + * @work: smb work containing smb request buffer + * + * Return: 0 + */ +int smb2_handle_negotiate(struct ksmbd_work *work) +{ + struct ksmbd_conn *conn = work->conn; + struct smb2_negotiate_req *req = smb2_get_msg(work->request_buf); + struct smb2_negotiate_rsp *rsp = smb2_get_msg(work->response_buf); + int rc = 0; + unsigned int smb2_buf_len, smb2_neg_size; + __le32 status; + + ksmbd_debug(SMB, "Received negotiate request\n"); + conn->need_neg = false; + if (ksmbd_conn_good(conn)) { + pr_err("conn->tcp_status is already in CifsGood State\n"); + work->send_no_response = 1; + return rc; + } + + if (req->DialectCount == 0) { + pr_err("malformed packet\n"); + rsp->hdr.Status = STATUS_INVALID_PARAMETER; + rc = -EINVAL; + goto err_out; + } + + smb2_buf_len = get_rfc1002_len(work->request_buf); + smb2_neg_size = offsetof(struct smb2_negotiate_req, Dialects); + if (smb2_neg_size > smb2_buf_len) { + rsp->hdr.Status = STATUS_INVALID_PARAMETER; + rc = -EINVAL; + goto err_out; + } + + if (conn->dialect == SMB311_PROT_ID) { + unsigned int nego_ctxt_off = le32_to_cpu(req->NegotiateContextOffset); + + if (smb2_buf_len < nego_ctxt_off) { + rsp->hdr.Status = STATUS_INVALID_PARAMETER; + rc = -EINVAL; + goto err_out; + } + + if (smb2_neg_size > nego_ctxt_off) { + rsp->hdr.Status = STATUS_INVALID_PARAMETER; + rc = -EINVAL; + goto err_out; + } + + if (smb2_neg_size + le16_to_cpu(req->DialectCount) * sizeof(__le16) > + nego_ctxt_off) { + rsp->hdr.Status = STATUS_INVALID_PARAMETER; + rc = -EINVAL; + goto err_out; + } + } else { + if (smb2_neg_size + le16_to_cpu(req->DialectCount) * sizeof(__le16) > + smb2_buf_len) { + rsp->hdr.Status = STATUS_INVALID_PARAMETER; + rc = -EINVAL; + goto err_out; + } + } + + conn->cli_cap = le32_to_cpu(req->Capabilities); + switch (conn->dialect) { + case SMB311_PROT_ID: + conn->preauth_info = + kzalloc(sizeof(struct preauth_integrity_info), + GFP_KERNEL); + if (!conn->preauth_info) { + rc = -ENOMEM; + rsp->hdr.Status = STATUS_INVALID_PARAMETER; + goto err_out; + } + + status = deassemble_neg_contexts(conn, req, + get_rfc1002_len(work->request_buf)); + if (status != STATUS_SUCCESS) { + pr_err("deassemble_neg_contexts error(0x%x)\n", + status); + rsp->hdr.Status = status; + rc = -EINVAL; + kfree(conn->preauth_info); + conn->preauth_info = NULL; + goto err_out; + } + + rc = init_smb3_11_server(conn); + if (rc < 0) { + rsp->hdr.Status = STATUS_INVALID_PARAMETER; + kfree(conn->preauth_info); + conn->preauth_info = NULL; + goto err_out; + } + + ksmbd_gen_preauth_integrity_hash(conn, + work->request_buf, + conn->preauth_info->Preauth_HashValue); + rsp->NegotiateContextOffset = + cpu_to_le32(OFFSET_OF_NEG_CONTEXT); + assemble_neg_contexts(conn, rsp, work->response_buf); + break; + case SMB302_PROT_ID: + init_smb3_02_server(conn); + break; + case SMB30_PROT_ID: + init_smb3_0_server(conn); + break; + case SMB21_PROT_ID: + init_smb2_1_server(conn); + break; + case SMB2X_PROT_ID: + case BAD_PROT_ID: + default: + ksmbd_debug(SMB, "Server dialect :0x%x not supported\n", + conn->dialect); + rsp->hdr.Status = STATUS_NOT_SUPPORTED; + rc = -EINVAL; + goto err_out; + } + rsp->Capabilities = cpu_to_le32(conn->vals->capabilities); + + /* For stats */ + conn->connection_type = conn->dialect; + + rsp->MaxTransactSize = cpu_to_le32(conn->vals->max_trans_size); + rsp->MaxReadSize = cpu_to_le32(conn->vals->max_read_size); + rsp->MaxWriteSize = cpu_to_le32(conn->vals->max_write_size); + + memcpy(conn->ClientGUID, req->ClientGUID, + SMB2_CLIENT_GUID_SIZE); + conn->cli_sec_mode = le16_to_cpu(req->SecurityMode); + + rsp->StructureSize = cpu_to_le16(65); + rsp->DialectRevision = cpu_to_le16(conn->dialect); + /* Not setting conn guid rsp->ServerGUID, as it + * not used by client for identifying server + */ + memset(rsp->ServerGUID, 0, SMB2_CLIENT_GUID_SIZE); + + rsp->SystemTime = cpu_to_le64(ksmbd_systime()); + rsp->ServerStartTime = 0; + ksmbd_debug(SMB, "negotiate context offset %d, count %d\n", + le32_to_cpu(rsp->NegotiateContextOffset), + le16_to_cpu(rsp->NegotiateContextCount)); + + rsp->SecurityBufferOffset = cpu_to_le16(128); + rsp->SecurityBufferLength = cpu_to_le16(AUTH_GSS_LENGTH); + ksmbd_copy_gss_neg_header((char *)(&rsp->hdr) + + le16_to_cpu(rsp->SecurityBufferOffset)); + inc_rfc1001_len(work->response_buf, sizeof(struct smb2_negotiate_rsp) - + sizeof(struct smb2_hdr) + AUTH_GSS_LENGTH); + rsp->SecurityMode = SMB2_NEGOTIATE_SIGNING_ENABLED_LE; + conn->use_spnego = true; + + if ((server_conf.signing == KSMBD_CONFIG_OPT_AUTO || + server_conf.signing == KSMBD_CONFIG_OPT_DISABLED) && + req->SecurityMode & SMB2_NEGOTIATE_SIGNING_REQUIRED_LE) + conn->sign = true; + else if (server_conf.signing == KSMBD_CONFIG_OPT_MANDATORY) { + server_conf.enforced_signing = true; + rsp->SecurityMode |= SMB2_NEGOTIATE_SIGNING_REQUIRED_LE; + conn->sign = true; + } + + conn->srv_sec_mode = le16_to_cpu(rsp->SecurityMode); + ksmbd_conn_set_need_negotiate(conn); + +err_out: + if (rc < 0) + smb2_set_err_rsp(work); + + return rc; +} + +static int alloc_preauth_hash(struct ksmbd_session *sess, + struct ksmbd_conn *conn) +{ + if (sess->Preauth_HashValue) + return 0; + + sess->Preauth_HashValue = kmemdup(conn->preauth_info->Preauth_HashValue, + PREAUTH_HASHVALUE_SIZE, GFP_KERNEL); + if (!sess->Preauth_HashValue) + return -ENOMEM; + + return 0; +} + +static int generate_preauth_hash(struct ksmbd_work *work) +{ + struct ksmbd_conn *conn = work->conn; + struct ksmbd_session *sess = work->sess; + u8 *preauth_hash; + + if (conn->dialect != SMB311_PROT_ID) + return 0; + + if (conn->binding) { + struct preauth_session *preauth_sess; + + preauth_sess = ksmbd_preauth_session_lookup(conn, sess->id); + if (!preauth_sess) { + preauth_sess = ksmbd_preauth_session_alloc(conn, sess->id); + if (!preauth_sess) + return -ENOMEM; + } + + preauth_hash = preauth_sess->Preauth_HashValue; + } else { + if (!sess->Preauth_HashValue) + if (alloc_preauth_hash(sess, conn)) + return -ENOMEM; + preauth_hash = sess->Preauth_HashValue; + } + + ksmbd_gen_preauth_integrity_hash(conn, work->request_buf, preauth_hash); + return 0; +} + +static int decode_negotiation_token(struct ksmbd_conn *conn, + struct negotiate_message *negblob, + size_t sz) +{ + if (!conn->use_spnego) + return -EINVAL; + + if (ksmbd_decode_negTokenInit((char *)negblob, sz, conn)) { + if (ksmbd_decode_negTokenTarg((char *)negblob, sz, conn)) { + conn->auth_mechs |= KSMBD_AUTH_NTLMSSP; + conn->preferred_auth_mech = KSMBD_AUTH_NTLMSSP; + conn->use_spnego = false; + } + } + return 0; +} + +static int ntlm_negotiate(struct ksmbd_work *work, + struct negotiate_message *negblob, + size_t negblob_len) +{ + struct smb2_sess_setup_rsp *rsp = smb2_get_msg(work->response_buf); + struct challenge_message *chgblob; + unsigned char *spnego_blob = NULL; + u16 spnego_blob_len; + char *neg_blob; + int sz, rc; + + ksmbd_debug(SMB, "negotiate phase\n"); + rc = ksmbd_decode_ntlmssp_neg_blob(negblob, negblob_len, work->conn); + if (rc) + return rc; + + sz = le16_to_cpu(rsp->SecurityBufferOffset); + chgblob = + (struct challenge_message *)((char *)&rsp->hdr.ProtocolId + sz); + memset(chgblob, 0, sizeof(struct challenge_message)); + + if (!work->conn->use_spnego) { + sz = ksmbd_build_ntlmssp_challenge_blob(chgblob, work->conn); + if (sz < 0) + return -ENOMEM; + + rsp->SecurityBufferLength = cpu_to_le16(sz); + return 0; + } + + sz = sizeof(struct challenge_message); + sz += (strlen(ksmbd_netbios_name()) * 2 + 1 + 4) * 6; + + neg_blob = kzalloc(sz, GFP_KERNEL); + if (!neg_blob) + return -ENOMEM; + + chgblob = (struct challenge_message *)neg_blob; + sz = ksmbd_build_ntlmssp_challenge_blob(chgblob, work->conn); + if (sz < 0) { + rc = -ENOMEM; + goto out; + } + + rc = build_spnego_ntlmssp_neg_blob(&spnego_blob, &spnego_blob_len, + neg_blob, sz); + if (rc) { + rc = -ENOMEM; + goto out; + } + + sz = le16_to_cpu(rsp->SecurityBufferOffset); + memcpy((char *)&rsp->hdr.ProtocolId + sz, spnego_blob, spnego_blob_len); + rsp->SecurityBufferLength = cpu_to_le16(spnego_blob_len); + +out: + kfree(spnego_blob); + kfree(neg_blob); + return rc; +} + +static struct authenticate_message *user_authblob(struct ksmbd_conn *conn, + struct smb2_sess_setup_req *req) +{ + int sz; + + if (conn->use_spnego && conn->mechToken) + return (struct authenticate_message *)conn->mechToken; + + sz = le16_to_cpu(req->SecurityBufferOffset); + return (struct authenticate_message *)((char *)&req->hdr.ProtocolId + + sz); +} + +static struct ksmbd_user *session_user(struct ksmbd_conn *conn, + struct smb2_sess_setup_req *req) +{ + struct authenticate_message *authblob; + struct ksmbd_user *user; + char *name; + unsigned int name_off, name_len, secbuf_len; + + secbuf_len = le16_to_cpu(req->SecurityBufferLength); + if (secbuf_len < sizeof(struct authenticate_message)) { + ksmbd_debug(SMB, "blob len %d too small\n", secbuf_len); + return NULL; + } + authblob = user_authblob(conn, req); + name_off = le32_to_cpu(authblob->UserName.BufferOffset); + name_len = le16_to_cpu(authblob->UserName.Length); + + if (secbuf_len < (u64)name_off + name_len) + return NULL; + + name = smb_strndup_from_utf16((const char *)authblob + name_off, + name_len, + true, + conn->local_nls); + if (IS_ERR(name)) { + pr_err("cannot allocate memory\n"); + return NULL; + } + + ksmbd_debug(SMB, "session setup request for user %s\n", name); + user = ksmbd_login_user(name); + kfree(name); + return user; +} + +static int ntlm_authenticate(struct ksmbd_work *work) +{ + struct smb2_sess_setup_req *req = smb2_get_msg(work->request_buf); + struct smb2_sess_setup_rsp *rsp = smb2_get_msg(work->response_buf); + struct ksmbd_conn *conn = work->conn; + struct ksmbd_session *sess = work->sess; + struct channel *chann = NULL; + struct ksmbd_user *user; + u64 prev_id; + int sz, rc; + + ksmbd_debug(SMB, "authenticate phase\n"); + if (conn->use_spnego) { + unsigned char *spnego_blob; + u16 spnego_blob_len; + + rc = build_spnego_ntlmssp_auth_blob(&spnego_blob, + &spnego_blob_len, + 0); + if (rc) + return -ENOMEM; + + sz = le16_to_cpu(rsp->SecurityBufferOffset); + memcpy((char *)&rsp->hdr.ProtocolId + sz, spnego_blob, spnego_blob_len); + rsp->SecurityBufferLength = cpu_to_le16(spnego_blob_len); + kfree(spnego_blob); + inc_rfc1001_len(work->response_buf, spnego_blob_len - 1); + } + + user = session_user(conn, req); + if (!user) { + ksmbd_debug(SMB, "Unknown user name or an error\n"); + return -EPERM; + } + + /* Check for previous session */ + prev_id = le64_to_cpu(req->PreviousSessionId); + if (prev_id && prev_id != sess->id) + destroy_previous_session(conn, user, prev_id); + + if (sess->state == SMB2_SESSION_VALID) { + /* + * Reuse session if anonymous try to connect + * on reauthetication. + */ + if (conn->binding == false && ksmbd_anonymous_user(user)) { + ksmbd_free_user(user); + return 0; + } + + if (!ksmbd_compare_user(sess->user, user)) { + ksmbd_free_user(user); + return -EPERM; + } + ksmbd_free_user(user); + } else { + sess->user = user; + } + + if (conn->binding == false && user_guest(sess->user)) { + rsp->SessionFlags = SMB2_SESSION_FLAG_IS_GUEST_LE; + } else { + struct authenticate_message *authblob; + + authblob = user_authblob(conn, req); + sz = le16_to_cpu(req->SecurityBufferLength); + rc = ksmbd_decode_ntlmssp_auth_blob(authblob, sz, conn, sess); + if (rc) { + set_user_flag(sess->user, KSMBD_USER_FLAG_BAD_PASSWORD); + ksmbd_debug(SMB, "authentication failed\n"); + return -EPERM; + } + } + + /* + * If session state is SMB2_SESSION_VALID, We can assume + * that it is reauthentication. And the user/password + * has been verified, so return it here. + */ + if (sess->state == SMB2_SESSION_VALID) { + if (conn->binding) + goto binding_session; + return 0; + } + + if ((rsp->SessionFlags != SMB2_SESSION_FLAG_IS_GUEST_LE && + (conn->sign || server_conf.enforced_signing)) || + (req->SecurityMode & SMB2_NEGOTIATE_SIGNING_REQUIRED)) + sess->sign = true; + + if (smb3_encryption_negotiated(conn) && + !(req->Flags & SMB2_SESSION_REQ_FLAG_BINDING)) { + rc = conn->ops->generate_encryptionkey(conn, sess); + if (rc) { + ksmbd_debug(SMB, + "SMB3 encryption key generation failed\n"); + return -EINVAL; + } + sess->enc = true; + if (server_conf.flags & KSMBD_GLOBAL_FLAG_SMB2_ENCRYPTION) + rsp->SessionFlags = SMB2_SESSION_FLAG_ENCRYPT_DATA_LE; + /* + * signing is disable if encryption is enable + * on this session + */ + sess->sign = false; + } + +binding_session: + if (conn->dialect >= SMB30_PROT_ID) { + chann = lookup_chann_list(sess, conn); + if (!chann) { + chann = kmalloc(sizeof(struct channel), GFP_KERNEL); + if (!chann) + return -ENOMEM; + + chann->conn = conn; + xa_store(&sess->ksmbd_chann_list, (long)conn, chann, GFP_KERNEL); + } + } + + if (conn->ops->generate_signingkey) { + rc = conn->ops->generate_signingkey(sess, conn); + if (rc) { + ksmbd_debug(SMB, "SMB3 signing key generation failed\n"); + return -EINVAL; + } + } + + if (!ksmbd_conn_lookup_dialect(conn)) { + pr_err("fail to verify the dialect\n"); + return -ENOENT; + } + return 0; +} + +#ifdef CONFIG_SMB_SERVER_KERBEROS5 +static int krb5_authenticate(struct ksmbd_work *work) +{ + struct smb2_sess_setup_req *req = smb2_get_msg(work->request_buf); + struct smb2_sess_setup_rsp *rsp = smb2_get_msg(work->response_buf); + struct ksmbd_conn *conn = work->conn; + struct ksmbd_session *sess = work->sess; + char *in_blob, *out_blob; + struct channel *chann = NULL; + u64 prev_sess_id; + int in_len, out_len; + int retval; + + in_blob = (char *)&req->hdr.ProtocolId + + le16_to_cpu(req->SecurityBufferOffset); + in_len = le16_to_cpu(req->SecurityBufferLength); + out_blob = (char *)&rsp->hdr.ProtocolId + + le16_to_cpu(rsp->SecurityBufferOffset); + out_len = work->response_sz - + (le16_to_cpu(rsp->SecurityBufferOffset) + 4); + + /* Check previous session */ + prev_sess_id = le64_to_cpu(req->PreviousSessionId); + if (prev_sess_id && prev_sess_id != sess->id) + destroy_previous_session(conn, sess->user, prev_sess_id); + + if (sess->state == SMB2_SESSION_VALID) + ksmbd_free_user(sess->user); + + retval = ksmbd_krb5_authenticate(sess, in_blob, in_len, + out_blob, &out_len); + if (retval) { + ksmbd_debug(SMB, "krb5 authentication failed\n"); + return -EINVAL; + } + rsp->SecurityBufferLength = cpu_to_le16(out_len); + inc_rfc1001_len(work->response_buf, out_len - 1); + + if ((conn->sign || server_conf.enforced_signing) || + (req->SecurityMode & SMB2_NEGOTIATE_SIGNING_REQUIRED)) + sess->sign = true; + + if (smb3_encryption_negotiated(conn)) { + retval = conn->ops->generate_encryptionkey(conn, sess); + if (retval) { + ksmbd_debug(SMB, + "SMB3 encryption key generation failed\n"); + return -EINVAL; + } + sess->enc = true; + if (server_conf.flags & KSMBD_GLOBAL_FLAG_SMB2_ENCRYPTION) + rsp->SessionFlags = SMB2_SESSION_FLAG_ENCRYPT_DATA_LE; + sess->sign = false; + } + + if (conn->dialect >= SMB30_PROT_ID) { + chann = lookup_chann_list(sess, conn); + if (!chann) { + chann = kmalloc(sizeof(struct channel), GFP_KERNEL); + if (!chann) + return -ENOMEM; + + chann->conn = conn; + xa_store(&sess->ksmbd_chann_list, (long)conn, chann, GFP_KERNEL); + } + } + + if (conn->ops->generate_signingkey) { + retval = conn->ops->generate_signingkey(sess, conn); + if (retval) { + ksmbd_debug(SMB, "SMB3 signing key generation failed\n"); + return -EINVAL; + } + } + + if (!ksmbd_conn_lookup_dialect(conn)) { + pr_err("fail to verify the dialect\n"); + return -ENOENT; + } + return 0; +} +#else +static int krb5_authenticate(struct ksmbd_work *work) +{ + return -EOPNOTSUPP; +} +#endif + +int smb2_sess_setup(struct ksmbd_work *work) +{ + struct ksmbd_conn *conn = work->conn; + struct smb2_sess_setup_req *req = smb2_get_msg(work->request_buf); + struct smb2_sess_setup_rsp *rsp = smb2_get_msg(work->response_buf); + struct ksmbd_session *sess; + struct negotiate_message *negblob; + unsigned int negblob_len, negblob_off; + int rc = 0; + + ksmbd_debug(SMB, "Received request for session setup\n"); + + rsp->StructureSize = cpu_to_le16(9); + rsp->SessionFlags = 0; + rsp->SecurityBufferOffset = cpu_to_le16(72); + rsp->SecurityBufferLength = 0; + inc_rfc1001_len(work->response_buf, 9); + + ksmbd_conn_lock(conn); + if (!req->hdr.SessionId) { + sess = ksmbd_smb2_session_create(); + if (!sess) { + rc = -ENOMEM; + goto out_err; + } + rsp->hdr.SessionId = cpu_to_le64(sess->id); + rc = ksmbd_session_register(conn, sess); + if (rc) + goto out_err; + } else if (conn->dialect >= SMB30_PROT_ID && + (server_conf.flags & KSMBD_GLOBAL_FLAG_SMB3_MULTICHANNEL) && + req->Flags & SMB2_SESSION_REQ_FLAG_BINDING) { + u64 sess_id = le64_to_cpu(req->hdr.SessionId); + + sess = ksmbd_session_lookup_slowpath(sess_id); + if (!sess) { + rc = -ENOENT; + goto out_err; + } + + if (conn->dialect != sess->dialect) { + rc = -EINVAL; + goto out_err; + } + + if (!(req->hdr.Flags & SMB2_FLAGS_SIGNED)) { + rc = -EINVAL; + goto out_err; + } + + if (strncmp(conn->ClientGUID, sess->ClientGUID, + SMB2_CLIENT_GUID_SIZE)) { + rc = -ENOENT; + goto out_err; + } + + if (sess->state == SMB2_SESSION_IN_PROGRESS) { + rc = -EACCES; + goto out_err; + } + + if (sess->state == SMB2_SESSION_EXPIRED) { + rc = -EFAULT; + goto out_err; + } + + if (ksmbd_conn_need_reconnect(conn)) { + rc = -EFAULT; + sess = NULL; + goto out_err; + } + + if (ksmbd_session_lookup(conn, sess_id)) { + rc = -EACCES; + goto out_err; + } + + if (user_guest(sess->user)) { + rc = -EOPNOTSUPP; + goto out_err; + } + + conn->binding = true; + } else if ((conn->dialect < SMB30_PROT_ID || + server_conf.flags & KSMBD_GLOBAL_FLAG_SMB3_MULTICHANNEL) && + (req->Flags & SMB2_SESSION_REQ_FLAG_BINDING)) { + sess = NULL; + rc = -EACCES; + goto out_err; + } else { + sess = ksmbd_session_lookup(conn, + le64_to_cpu(req->hdr.SessionId)); + if (!sess) { + rc = -ENOENT; + goto out_err; + } + + if (sess->state == SMB2_SESSION_EXPIRED) { + rc = -EFAULT; + goto out_err; + } + + if (ksmbd_conn_need_reconnect(conn)) { + rc = -EFAULT; + sess = NULL; + goto out_err; + } + } + work->sess = sess; + + negblob_off = le16_to_cpu(req->SecurityBufferOffset); + negblob_len = le16_to_cpu(req->SecurityBufferLength); + if (negblob_off < offsetof(struct smb2_sess_setup_req, Buffer) || + negblob_len < offsetof(struct negotiate_message, NegotiateFlags)) { + rc = -EINVAL; + goto out_err; + } + + negblob = (struct negotiate_message *)((char *)&req->hdr.ProtocolId + + negblob_off); + + if (decode_negotiation_token(conn, negblob, negblob_len) == 0) { + if (conn->mechToken) + negblob = (struct negotiate_message *)conn->mechToken; + } + + if (server_conf.auth_mechs & conn->auth_mechs) { + rc = generate_preauth_hash(work); + if (rc) + goto out_err; + + if (conn->preferred_auth_mech & + (KSMBD_AUTH_KRB5 | KSMBD_AUTH_MSKRB5)) { + rc = krb5_authenticate(work); + if (rc) { + rc = -EINVAL; + goto out_err; + } + + if (!ksmbd_conn_need_reconnect(conn)) { + ksmbd_conn_set_good(conn); + sess->state = SMB2_SESSION_VALID; + } + kfree(sess->Preauth_HashValue); + sess->Preauth_HashValue = NULL; + } else if (conn->preferred_auth_mech == KSMBD_AUTH_NTLMSSP) { + if (negblob->MessageType == NtLmNegotiate) { + rc = ntlm_negotiate(work, negblob, negblob_len); + if (rc) + goto out_err; + rsp->hdr.Status = + STATUS_MORE_PROCESSING_REQUIRED; + /* + * Note: here total size -1 is done as an + * adjustment for 0 size blob + */ + inc_rfc1001_len(work->response_buf, + le16_to_cpu(rsp->SecurityBufferLength) - 1); + + } else if (negblob->MessageType == NtLmAuthenticate) { + rc = ntlm_authenticate(work); + if (rc) + goto out_err; + + if (!ksmbd_conn_need_reconnect(conn)) { + ksmbd_conn_set_good(conn); + sess->state = SMB2_SESSION_VALID; + } + if (conn->binding) { + struct preauth_session *preauth_sess; + + preauth_sess = + ksmbd_preauth_session_lookup(conn, sess->id); + if (preauth_sess) { + list_del(&preauth_sess->preauth_entry); + kfree(preauth_sess); + } + } + kfree(sess->Preauth_HashValue); + sess->Preauth_HashValue = NULL; + } else { + pr_info_ratelimited("Unknown NTLMSSP message type : 0x%x\n", + le32_to_cpu(negblob->MessageType)); + rc = -EINVAL; + } + } else { + /* TODO: need one more negotiation */ + pr_err("Not support the preferred authentication\n"); + rc = -EINVAL; + } + } else { + pr_err("Not support authentication\n"); + rc = -EINVAL; + } + +out_err: + if (rc == -EINVAL) + rsp->hdr.Status = STATUS_INVALID_PARAMETER; + else if (rc == -ENOENT) + rsp->hdr.Status = STATUS_USER_SESSION_DELETED; + else if (rc == -EACCES) + rsp->hdr.Status = STATUS_REQUEST_NOT_ACCEPTED; + else if (rc == -EFAULT) + rsp->hdr.Status = STATUS_NETWORK_SESSION_EXPIRED; + else if (rc == -ENOMEM) + rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES; + else if (rc == -EOPNOTSUPP) + rsp->hdr.Status = STATUS_NOT_SUPPORTED; + else if (rc) + rsp->hdr.Status = STATUS_LOGON_FAILURE; + + if (conn->use_spnego && conn->mechToken) { + kfree(conn->mechToken); + conn->mechToken = NULL; + } + + if (rc < 0) { + /* + * SecurityBufferOffset should be set to zero + * in session setup error response. + */ + rsp->SecurityBufferOffset = 0; + + if (sess) { + bool try_delay = false; + + /* + * To avoid dictionary attacks (repeated session setups rapidly sent) to + * connect to server, ksmbd make a delay of a 5 seconds on session setup + * failure to make it harder to send enough random connection requests + * to break into a server. + */ + if (sess->user && sess->user->flags & KSMBD_USER_FLAG_DELAY_SESSION) + try_delay = true; + + sess->last_active = jiffies; + sess->state = SMB2_SESSION_EXPIRED; + if (try_delay) { + ksmbd_conn_set_need_reconnect(conn); + ssleep(5); + ksmbd_conn_set_need_negotiate(conn); + } + } + } + + ksmbd_conn_unlock(conn); + return rc; +} + +/** + * smb2_tree_connect() - handler for smb2 tree connect command + * @work: smb work containing smb request buffer + * + * Return: 0 on success, otherwise error + */ +int smb2_tree_connect(struct ksmbd_work *work) +{ + struct ksmbd_conn *conn = work->conn; + struct smb2_tree_connect_req *req = smb2_get_msg(work->request_buf); + struct smb2_tree_connect_rsp *rsp = smb2_get_msg(work->response_buf); + struct ksmbd_session *sess = work->sess; + char *treename = NULL, *name = NULL; + struct ksmbd_tree_conn_status status; + struct ksmbd_share_config *share; + int rc = -EINVAL; + + treename = smb_strndup_from_utf16(req->Buffer, + le16_to_cpu(req->PathLength), true, + conn->local_nls); + if (IS_ERR(treename)) { + pr_err("treename is NULL\n"); + status.ret = KSMBD_TREE_CONN_STATUS_ERROR; + goto out_err1; + } + + name = ksmbd_extract_sharename(conn->um, treename); + if (IS_ERR(name)) { + status.ret = KSMBD_TREE_CONN_STATUS_ERROR; + goto out_err1; + } + + ksmbd_debug(SMB, "tree connect request for tree %s treename %s\n", + name, treename); + + status = ksmbd_tree_conn_connect(conn, sess, name); + if (status.ret == KSMBD_TREE_CONN_STATUS_OK) + rsp->hdr.Id.SyncId.TreeId = cpu_to_le32(status.tree_conn->id); + else + goto out_err1; + + share = status.tree_conn->share_conf; + if (test_share_config_flag(share, KSMBD_SHARE_FLAG_PIPE)) { + ksmbd_debug(SMB, "IPC share path request\n"); + rsp->ShareType = SMB2_SHARE_TYPE_PIPE; + rsp->MaximalAccess = FILE_READ_DATA_LE | FILE_READ_EA_LE | + FILE_EXECUTE_LE | FILE_READ_ATTRIBUTES_LE | + FILE_DELETE_LE | FILE_READ_CONTROL_LE | + FILE_WRITE_DAC_LE | FILE_WRITE_OWNER_LE | + FILE_SYNCHRONIZE_LE; + } else { + rsp->ShareType = SMB2_SHARE_TYPE_DISK; + rsp->MaximalAccess = FILE_READ_DATA_LE | FILE_READ_EA_LE | + FILE_EXECUTE_LE | FILE_READ_ATTRIBUTES_LE; + if (test_tree_conn_flag(status.tree_conn, + KSMBD_TREE_CONN_FLAG_WRITABLE)) { + rsp->MaximalAccess |= FILE_WRITE_DATA_LE | + FILE_APPEND_DATA_LE | FILE_WRITE_EA_LE | + FILE_DELETE_LE | FILE_WRITE_ATTRIBUTES_LE | + FILE_DELETE_CHILD_LE | FILE_READ_CONTROL_LE | + FILE_WRITE_DAC_LE | FILE_WRITE_OWNER_LE | + FILE_SYNCHRONIZE_LE; + } + } + + status.tree_conn->maximal_access = le32_to_cpu(rsp->MaximalAccess); + if (conn->posix_ext_supported) + status.tree_conn->posix_extensions = true; + + rsp->StructureSize = cpu_to_le16(16); + inc_rfc1001_len(work->response_buf, 16); +out_err1: + rsp->Capabilities = 0; + rsp->Reserved = 0; + /* default manual caching */ + rsp->ShareFlags = SMB2_SHAREFLAG_MANUAL_CACHING; + + if (!IS_ERR(treename)) + kfree(treename); + if (!IS_ERR(name)) + kfree(name); + + switch (status.ret) { + case KSMBD_TREE_CONN_STATUS_OK: + rsp->hdr.Status = STATUS_SUCCESS; + rc = 0; + break; + case -ESTALE: + case -ENOENT: + case KSMBD_TREE_CONN_STATUS_NO_SHARE: + rsp->hdr.Status = STATUS_BAD_NETWORK_NAME; + break; + case -ENOMEM: + case KSMBD_TREE_CONN_STATUS_NOMEM: + rsp->hdr.Status = STATUS_NO_MEMORY; + break; + case KSMBD_TREE_CONN_STATUS_ERROR: + case KSMBD_TREE_CONN_STATUS_TOO_MANY_CONNS: + case KSMBD_TREE_CONN_STATUS_TOO_MANY_SESSIONS: + rsp->hdr.Status = STATUS_ACCESS_DENIED; + break; + case -EINVAL: + rsp->hdr.Status = STATUS_INVALID_PARAMETER; + break; + default: + rsp->hdr.Status = STATUS_ACCESS_DENIED; + } + + if (status.ret != KSMBD_TREE_CONN_STATUS_OK) + smb2_set_err_rsp(work); + + return rc; +} + +/** + * smb2_create_open_flags() - convert smb open flags to unix open flags + * @file_present: is file already present + * @access: file access flags + * @disposition: file disposition flags + * @may_flags: set with MAY_ flags + * + * Return: file open flags + */ +static int smb2_create_open_flags(bool file_present, __le32 access, + __le32 disposition, + int *may_flags) +{ + int oflags = O_NONBLOCK | O_LARGEFILE; + + if (access & FILE_READ_DESIRED_ACCESS_LE && + access & FILE_WRITE_DESIRE_ACCESS_LE) { + oflags |= O_RDWR; + *may_flags = MAY_OPEN | MAY_READ | MAY_WRITE; + } else if (access & FILE_WRITE_DESIRE_ACCESS_LE) { + oflags |= O_WRONLY; + *may_flags = MAY_OPEN | MAY_WRITE; + } else { + oflags |= O_RDONLY; + *may_flags = MAY_OPEN | MAY_READ; + } + + if (access == FILE_READ_ATTRIBUTES_LE) + oflags |= O_PATH; + + if (file_present) { + switch (disposition & FILE_CREATE_MASK_LE) { + case FILE_OPEN_LE: + case FILE_CREATE_LE: + break; + case FILE_SUPERSEDE_LE: + case FILE_OVERWRITE_LE: + case FILE_OVERWRITE_IF_LE: + oflags |= O_TRUNC; + break; + default: + break; + } + } else { + switch (disposition & FILE_CREATE_MASK_LE) { + case FILE_SUPERSEDE_LE: + case FILE_CREATE_LE: + case FILE_OPEN_IF_LE: + case FILE_OVERWRITE_IF_LE: + oflags |= O_CREAT; + break; + case FILE_OPEN_LE: + case FILE_OVERWRITE_LE: + oflags &= ~O_CREAT; + break; + default: + break; + } + } + + return oflags; +} + +/** + * smb2_tree_disconnect() - handler for smb tree connect request + * @work: smb work containing request buffer + * + * Return: 0 + */ +int smb2_tree_disconnect(struct ksmbd_work *work) +{ + struct smb2_tree_disconnect_rsp *rsp = smb2_get_msg(work->response_buf); + struct ksmbd_session *sess = work->sess; + struct ksmbd_tree_connect *tcon = work->tcon; + + rsp->StructureSize = cpu_to_le16(4); + inc_rfc1001_len(work->response_buf, 4); + + ksmbd_debug(SMB, "request\n"); + + if (!tcon || test_and_set_bit(TREE_CONN_EXPIRE, &tcon->status)) { + struct smb2_tree_disconnect_req *req = + smb2_get_msg(work->request_buf); + + ksmbd_debug(SMB, "Invalid tid %d\n", req->hdr.Id.SyncId.TreeId); + + rsp->hdr.Status = STATUS_NETWORK_NAME_DELETED; + smb2_set_err_rsp(work); + return 0; + } + + ksmbd_close_tree_conn_fds(work); + ksmbd_tree_conn_disconnect(sess, tcon); + work->tcon = NULL; + return 0; +} + +/** + * smb2_session_logoff() - handler for session log off request + * @work: smb work containing request buffer + * + * Return: 0 + */ +int smb2_session_logoff(struct ksmbd_work *work) +{ + struct ksmbd_conn *conn = work->conn; + struct smb2_logoff_rsp *rsp = smb2_get_msg(work->response_buf); + struct ksmbd_session *sess; + struct smb2_logoff_req *req = smb2_get_msg(work->request_buf); + u64 sess_id = le64_to_cpu(req->hdr.SessionId); + + rsp->StructureSize = cpu_to_le16(4); + inc_rfc1001_len(work->response_buf, 4); + + ksmbd_debug(SMB, "request\n"); + + ksmbd_all_conn_set_status(sess_id, KSMBD_SESS_NEED_RECONNECT); + ksmbd_close_session_fds(work); + ksmbd_conn_wait_idle(conn, sess_id); + + /* + * Re-lookup session to validate if session is deleted + * while waiting request complete + */ + sess = ksmbd_session_lookup_all(conn, sess_id); + if (ksmbd_tree_conn_session_logoff(sess)) { + ksmbd_debug(SMB, "Invalid tid %d\n", req->hdr.Id.SyncId.TreeId); + rsp->hdr.Status = STATUS_NETWORK_NAME_DELETED; + smb2_set_err_rsp(work); + return 0; + } + + ksmbd_destroy_file_table(&sess->file_table); + sess->state = SMB2_SESSION_EXPIRED; + + ksmbd_free_user(sess->user); + sess->user = NULL; + ksmbd_all_conn_set_status(sess_id, KSMBD_SESS_NEED_NEGOTIATE); + return 0; +} + +/** + * create_smb2_pipe() - create IPC pipe + * @work: smb work containing request buffer + * + * Return: 0 on success, otherwise error + */ +static noinline int create_smb2_pipe(struct ksmbd_work *work) +{ + struct smb2_create_rsp *rsp = smb2_get_msg(work->response_buf); + struct smb2_create_req *req = smb2_get_msg(work->request_buf); + int id; + int err; + char *name; + + name = smb_strndup_from_utf16(req->Buffer, le16_to_cpu(req->NameLength), + 1, work->conn->local_nls); + if (IS_ERR(name)) { + rsp->hdr.Status = STATUS_NO_MEMORY; + err = PTR_ERR(name); + goto out; + } + + id = ksmbd_session_rpc_open(work->sess, name); + if (id < 0) { + pr_err("Unable to open RPC pipe: %d\n", id); + err = id; + goto out; + } + + rsp->hdr.Status = STATUS_SUCCESS; + rsp->StructureSize = cpu_to_le16(89); + rsp->OplockLevel = SMB2_OPLOCK_LEVEL_NONE; + rsp->Flags = 0; + rsp->CreateAction = cpu_to_le32(FILE_OPENED); + + rsp->CreationTime = cpu_to_le64(0); + rsp->LastAccessTime = cpu_to_le64(0); + rsp->ChangeTime = cpu_to_le64(0); + rsp->AllocationSize = cpu_to_le64(0); + rsp->EndofFile = cpu_to_le64(0); + rsp->FileAttributes = FILE_ATTRIBUTE_NORMAL_LE; + rsp->Reserved2 = 0; + rsp->VolatileFileId = id; + rsp->PersistentFileId = 0; + rsp->CreateContextsOffset = 0; + rsp->CreateContextsLength = 0; + + inc_rfc1001_len(work->response_buf, 88); /* StructureSize - 1*/ + kfree(name); + return 0; + +out: + switch (err) { + case -EINVAL: + rsp->hdr.Status = STATUS_INVALID_PARAMETER; + break; + case -ENOSPC: + case -ENOMEM: + rsp->hdr.Status = STATUS_NO_MEMORY; + break; + } + + if (!IS_ERR(name)) + kfree(name); + + smb2_set_err_rsp(work); + return err; +} + +/** + * smb2_set_ea() - handler for setting extended attributes using set + * info command + * @eabuf: set info command buffer + * @buf_len: set info command buffer length + * @path: dentry path for get ea + * + * Return: 0 on success, otherwise error + */ +static int smb2_set_ea(struct smb2_ea_info *eabuf, unsigned int buf_len, + const struct path *path) +{ + struct mnt_idmap *idmap = mnt_idmap(path->mnt); + char *attr_name = NULL, *value; + int rc = 0; + unsigned int next = 0; + + if (buf_len < sizeof(struct smb2_ea_info) + eabuf->EaNameLength + + le16_to_cpu(eabuf->EaValueLength)) + return -EINVAL; + + attr_name = kmalloc(XATTR_NAME_MAX + 1, GFP_KERNEL); + if (!attr_name) + return -ENOMEM; + + do { + if (!eabuf->EaNameLength) + goto next; + + ksmbd_debug(SMB, + "name : <%s>, name_len : %u, value_len : %u, next : %u\n", + eabuf->name, eabuf->EaNameLength, + le16_to_cpu(eabuf->EaValueLength), + le32_to_cpu(eabuf->NextEntryOffset)); + + if (eabuf->EaNameLength > + (XATTR_NAME_MAX - XATTR_USER_PREFIX_LEN)) { + rc = -EINVAL; + break; + } + + memcpy(attr_name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN); + memcpy(&attr_name[XATTR_USER_PREFIX_LEN], eabuf->name, + eabuf->EaNameLength); + attr_name[XATTR_USER_PREFIX_LEN + eabuf->EaNameLength] = '\0'; + value = (char *)&eabuf->name + eabuf->EaNameLength + 1; + + if (!eabuf->EaValueLength) { + rc = ksmbd_vfs_casexattr_len(idmap, + path->dentry, + attr_name, + XATTR_USER_PREFIX_LEN + + eabuf->EaNameLength); + + /* delete the EA only when it exits */ + if (rc > 0) { + rc = ksmbd_vfs_remove_xattr(idmap, + path->dentry, + attr_name); + + if (rc < 0) { + ksmbd_debug(SMB, + "remove xattr failed(%d)\n", + rc); + break; + } + } + + /* if the EA doesn't exist, just do nothing. */ + rc = 0; + } else { + rc = ksmbd_vfs_setxattr(idmap, + path->dentry, attr_name, value, + le16_to_cpu(eabuf->EaValueLength), 0); + if (rc < 0) { + ksmbd_debug(SMB, + "ksmbd_vfs_setxattr is failed(%d)\n", + rc); + break; + } + } + +next: + next = le32_to_cpu(eabuf->NextEntryOffset); + if (next == 0 || buf_len < next) + break; + buf_len -= next; + eabuf = (struct smb2_ea_info *)((char *)eabuf + next); + if (next < (u32)eabuf->EaNameLength + le16_to_cpu(eabuf->EaValueLength)) + break; + + } while (next != 0); + + kfree(attr_name); + return rc; +} + +static noinline int smb2_set_stream_name_xattr(const struct path *path, + struct ksmbd_file *fp, + char *stream_name, int s_type) +{ + struct mnt_idmap *idmap = mnt_idmap(path->mnt); + size_t xattr_stream_size; + char *xattr_stream_name; + int rc; + + rc = ksmbd_vfs_xattr_stream_name(stream_name, + &xattr_stream_name, + &xattr_stream_size, + s_type); + if (rc) + return rc; + + fp->stream.name = xattr_stream_name; + fp->stream.size = xattr_stream_size; + + /* Check if there is stream prefix in xattr space */ + rc = ksmbd_vfs_casexattr_len(idmap, + path->dentry, + xattr_stream_name, + xattr_stream_size); + if (rc >= 0) + return 0; + + if (fp->cdoption == FILE_OPEN_LE) { + ksmbd_debug(SMB, "XATTR stream name lookup failed: %d\n", rc); + return -EBADF; + } + + rc = ksmbd_vfs_setxattr(idmap, path->dentry, + xattr_stream_name, NULL, 0, 0); + if (rc < 0) + pr_err("Failed to store XATTR stream name :%d\n", rc); + return 0; +} + +static int smb2_remove_smb_xattrs(const struct path *path) +{ + struct mnt_idmap *idmap = mnt_idmap(path->mnt); + char *name, *xattr_list = NULL; + ssize_t xattr_list_len; + int err = 0; + + xattr_list_len = ksmbd_vfs_listxattr(path->dentry, &xattr_list); + if (xattr_list_len < 0) { + goto out; + } else if (!xattr_list_len) { + ksmbd_debug(SMB, "empty xattr in the file\n"); + goto out; + } + + for (name = xattr_list; name - xattr_list < xattr_list_len; + name += strlen(name) + 1) { + ksmbd_debug(SMB, "%s, len %zd\n", name, strlen(name)); + + if (!strncmp(name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN) && + !strncmp(&name[XATTR_USER_PREFIX_LEN], STREAM_PREFIX, + STREAM_PREFIX_LEN)) { + err = ksmbd_vfs_remove_xattr(idmap, path->dentry, + name); + if (err) + ksmbd_debug(SMB, "remove xattr failed : %s\n", + name); + } + } +out: + kvfree(xattr_list); + return err; +} + +static int smb2_create_truncate(const struct path *path) +{ + int rc = vfs_truncate(path, 0); + + if (rc) { + pr_err("vfs_truncate failed, rc %d\n", rc); + return rc; + } + + rc = smb2_remove_smb_xattrs(path); + if (rc == -EOPNOTSUPP) + rc = 0; + if (rc) + ksmbd_debug(SMB, + "ksmbd_truncate_stream_name_xattr failed, rc %d\n", + rc); + return rc; +} + +static void smb2_new_xattrs(struct ksmbd_tree_connect *tcon, const struct path *path, + struct ksmbd_file *fp) +{ + struct xattr_dos_attrib da = {0}; + int rc; + + if (!test_share_config_flag(tcon->share_conf, + KSMBD_SHARE_FLAG_STORE_DOS_ATTRS)) + return; + + da.version = 4; + da.attr = le32_to_cpu(fp->f_ci->m_fattr); + da.itime = da.create_time = fp->create_time; + da.flags = XATTR_DOSINFO_ATTRIB | XATTR_DOSINFO_CREATE_TIME | + XATTR_DOSINFO_ITIME; + + rc = ksmbd_vfs_set_dos_attrib_xattr(mnt_idmap(path->mnt), + path->dentry, &da); + if (rc) + ksmbd_debug(SMB, "failed to store file attribute into xattr\n"); +} + +static void smb2_update_xattrs(struct ksmbd_tree_connect *tcon, + const struct path *path, struct ksmbd_file *fp) +{ + struct xattr_dos_attrib da; + int rc; + + fp->f_ci->m_fattr &= ~(FILE_ATTRIBUTE_HIDDEN_LE | FILE_ATTRIBUTE_SYSTEM_LE); + + /* get FileAttributes from XATTR_NAME_DOS_ATTRIBUTE */ + if (!test_share_config_flag(tcon->share_conf, + KSMBD_SHARE_FLAG_STORE_DOS_ATTRS)) + return; + + rc = ksmbd_vfs_get_dos_attrib_xattr(mnt_idmap(path->mnt), + path->dentry, &da); + if (rc > 0) { + fp->f_ci->m_fattr = cpu_to_le32(da.attr); + fp->create_time = da.create_time; + fp->itime = da.itime; + } +} + +static int smb2_creat(struct ksmbd_work *work, struct path *path, char *name, + int open_flags, umode_t posix_mode, bool is_dir) +{ + struct ksmbd_tree_connect *tcon = work->tcon; + struct ksmbd_share_config *share = tcon->share_conf; + umode_t mode; + int rc; + + if (!(open_flags & O_CREAT)) + return -EBADF; + + ksmbd_debug(SMB, "file does not exist, so creating\n"); + if (is_dir == true) { + ksmbd_debug(SMB, "creating directory\n"); + + mode = share_config_directory_mode(share, posix_mode); + rc = ksmbd_vfs_mkdir(work, name, mode); + if (rc) + return rc; + } else { + ksmbd_debug(SMB, "creating regular file\n"); + + mode = share_config_create_mode(share, posix_mode); + rc = ksmbd_vfs_create(work, name, mode); + if (rc) + return rc; + } + + rc = ksmbd_vfs_kern_path_locked(work, name, 0, path, 0); + if (rc) { + pr_err("cannot get linux path (%s), err = %d\n", + name, rc); + return rc; + } + return 0; +} + +static int smb2_create_sd_buffer(struct ksmbd_work *work, + struct smb2_create_req *req, + const struct path *path) +{ + struct create_context *context; + struct create_sd_buf_req *sd_buf; + + if (!req->CreateContextsOffset) + return -ENOENT; + + /* Parse SD BUFFER create contexts */ + context = smb2_find_context_vals(req, SMB2_CREATE_SD_BUFFER, 4); + if (!context) + return -ENOENT; + else if (IS_ERR(context)) + return PTR_ERR(context); + + ksmbd_debug(SMB, + "Set ACLs using SMB2_CREATE_SD_BUFFER context\n"); + sd_buf = (struct create_sd_buf_req *)context; + if (le16_to_cpu(context->DataOffset) + + le32_to_cpu(context->DataLength) < + sizeof(struct create_sd_buf_req)) + return -EINVAL; + return set_info_sec(work->conn, work->tcon, path, &sd_buf->ntsd, + le32_to_cpu(sd_buf->ccontext.DataLength), true); +} + +static void ksmbd_acls_fattr(struct smb_fattr *fattr, + struct mnt_idmap *idmap, + struct inode *inode) +{ + vfsuid_t vfsuid = i_uid_into_vfsuid(idmap, inode); + vfsgid_t vfsgid = i_gid_into_vfsgid(idmap, inode); + + fattr->cf_uid = vfsuid_into_kuid(vfsuid); + fattr->cf_gid = vfsgid_into_kgid(vfsgid); + fattr->cf_mode = inode->i_mode; + fattr->cf_acls = NULL; + fattr->cf_dacls = NULL; + + if (IS_ENABLED(CONFIG_FS_POSIX_ACL)) { + fattr->cf_acls = get_inode_acl(inode, ACL_TYPE_ACCESS); + if (S_ISDIR(inode->i_mode)) + fattr->cf_dacls = get_inode_acl(inode, ACL_TYPE_DEFAULT); + } +} + +/** + * smb2_open() - handler for smb file open request + * @work: smb work containing request buffer + * + * Return: 0 on success, otherwise error + */ +int smb2_open(struct ksmbd_work *work) +{ + struct ksmbd_conn *conn = work->conn; + struct ksmbd_session *sess = work->sess; + struct ksmbd_tree_connect *tcon = work->tcon; + struct smb2_create_req *req; + struct smb2_create_rsp *rsp; + struct path path; + struct ksmbd_share_config *share = tcon->share_conf; + struct ksmbd_file *fp = NULL; + struct file *filp = NULL; + struct mnt_idmap *idmap = NULL; + struct kstat stat; + struct create_context *context; + struct lease_ctx_info *lc = NULL; + struct create_ea_buf_req *ea_buf = NULL; + struct oplock_info *opinfo; + __le32 *next_ptr = NULL; + int req_op_level = 0, open_flags = 0, may_flags = 0, file_info = 0; + int rc = 0; + int contxt_cnt = 0, query_disk_id = 0; + int maximal_access_ctxt = 0, posix_ctxt = 0; + int s_type = 0; + int next_off = 0; + char *name = NULL; + char *stream_name = NULL; + bool file_present = false, created = false, already_permitted = false; + int share_ret, need_truncate = 0; + u64 time; + umode_t posix_mode = 0; + __le32 daccess, maximal_access = 0; + + WORK_BUFFERS(work, req, rsp); + + if (req->hdr.NextCommand && !work->next_smb2_rcv_hdr_off && + (req->hdr.Flags & SMB2_FLAGS_RELATED_OPERATIONS)) { + ksmbd_debug(SMB, "invalid flag in chained command\n"); + rsp->hdr.Status = STATUS_INVALID_PARAMETER; + smb2_set_err_rsp(work); + return -EINVAL; + } + + if (test_share_config_flag(share, KSMBD_SHARE_FLAG_PIPE)) { + ksmbd_debug(SMB, "IPC pipe create request\n"); + return create_smb2_pipe(work); + } + + if (req->NameLength) { + if ((req->CreateOptions & FILE_DIRECTORY_FILE_LE) && + *(char *)req->Buffer == '\\') { + pr_err("not allow directory name included leading slash\n"); + rc = -EINVAL; + goto err_out1; + } + + name = smb2_get_name(req->Buffer, + le16_to_cpu(req->NameLength), + work->conn->local_nls); + if (IS_ERR(name)) { + rc = PTR_ERR(name); + if (rc != -ENOMEM) + rc = -ENOENT; + name = NULL; + goto err_out1; + } + + ksmbd_debug(SMB, "converted name = %s\n", name); + if (strchr(name, ':')) { + if (!test_share_config_flag(work->tcon->share_conf, + KSMBD_SHARE_FLAG_STREAMS)) { + rc = -EBADF; + goto err_out1; + } + rc = parse_stream_name(name, &stream_name, &s_type); + if (rc < 0) + goto err_out1; + } + + rc = ksmbd_validate_filename(name); + if (rc < 0) + goto err_out1; + + if (ksmbd_share_veto_filename(share, name)) { + rc = -ENOENT; + ksmbd_debug(SMB, "Reject open(), vetoed file: %s\n", + name); + goto err_out1; + } + } else { + name = kstrdup("", GFP_KERNEL); + if (!name) { + rc = -ENOMEM; + goto err_out1; + } + } + + req_op_level = req->RequestedOplockLevel; + if (req_op_level == SMB2_OPLOCK_LEVEL_LEASE) + lc = parse_lease_state(req); + + if (le32_to_cpu(req->ImpersonationLevel) > le32_to_cpu(IL_DELEGATE)) { + pr_err("Invalid impersonationlevel : 0x%x\n", + le32_to_cpu(req->ImpersonationLevel)); + rc = -EIO; + rsp->hdr.Status = STATUS_BAD_IMPERSONATION_LEVEL; + goto err_out1; + } + + if (req->CreateOptions && !(req->CreateOptions & CREATE_OPTIONS_MASK_LE)) { + pr_err("Invalid create options : 0x%x\n", + le32_to_cpu(req->CreateOptions)); + rc = -EINVAL; + goto err_out1; + } else { + if (req->CreateOptions & FILE_SEQUENTIAL_ONLY_LE && + req->CreateOptions & FILE_RANDOM_ACCESS_LE) + req->CreateOptions = ~(FILE_SEQUENTIAL_ONLY_LE); + + if (req->CreateOptions & + (FILE_OPEN_BY_FILE_ID_LE | CREATE_TREE_CONNECTION | + FILE_RESERVE_OPFILTER_LE)) { + rc = -EOPNOTSUPP; + goto err_out1; + } + + if (req->CreateOptions & FILE_DIRECTORY_FILE_LE) { + if (req->CreateOptions & FILE_NON_DIRECTORY_FILE_LE) { + rc = -EINVAL; + goto err_out1; + } else if (req->CreateOptions & FILE_NO_COMPRESSION_LE) { + req->CreateOptions = ~(FILE_NO_COMPRESSION_LE); + } + } + } + + if (le32_to_cpu(req->CreateDisposition) > + le32_to_cpu(FILE_OVERWRITE_IF_LE)) { + pr_err("Invalid create disposition : 0x%x\n", + le32_to_cpu(req->CreateDisposition)); + rc = -EINVAL; + goto err_out1; + } + + if (!(req->DesiredAccess & DESIRED_ACCESS_MASK)) { + pr_err("Invalid desired access : 0x%x\n", + le32_to_cpu(req->DesiredAccess)); + rc = -EACCES; + goto err_out1; + } + + if (req->FileAttributes && !(req->FileAttributes & FILE_ATTRIBUTE_MASK_LE)) { + pr_err("Invalid file attribute : 0x%x\n", + le32_to_cpu(req->FileAttributes)); + rc = -EINVAL; + goto err_out1; + } + + if (req->CreateContextsOffset) { + /* Parse non-durable handle create contexts */ + context = smb2_find_context_vals(req, SMB2_CREATE_EA_BUFFER, 4); + if (IS_ERR(context)) { + rc = PTR_ERR(context); + goto err_out1; + } else if (context) { + ea_buf = (struct create_ea_buf_req *)context; + if (le16_to_cpu(context->DataOffset) + + le32_to_cpu(context->DataLength) < + sizeof(struct create_ea_buf_req)) { + rc = -EINVAL; + goto err_out1; + } + if (req->CreateOptions & FILE_NO_EA_KNOWLEDGE_LE) { + rsp->hdr.Status = STATUS_ACCESS_DENIED; + rc = -EACCES; + goto err_out1; + } + } + + context = smb2_find_context_vals(req, + SMB2_CREATE_QUERY_MAXIMAL_ACCESS_REQUEST, 4); + if (IS_ERR(context)) { + rc = PTR_ERR(context); + goto err_out1; + } else if (context) { + ksmbd_debug(SMB, + "get query maximal access context\n"); + maximal_access_ctxt = 1; + } + + context = smb2_find_context_vals(req, + SMB2_CREATE_TIMEWARP_REQUEST, 4); + if (IS_ERR(context)) { + rc = PTR_ERR(context); + goto err_out1; + } else if (context) { + ksmbd_debug(SMB, "get timewarp context\n"); + rc = -EBADF; + goto err_out1; + } + + if (tcon->posix_extensions) { + context = smb2_find_context_vals(req, + SMB2_CREATE_TAG_POSIX, 16); + if (IS_ERR(context)) { + rc = PTR_ERR(context); + goto err_out1; + } else if (context) { + struct create_posix *posix = + (struct create_posix *)context; + if (le16_to_cpu(context->DataOffset) + + le32_to_cpu(context->DataLength) < + sizeof(struct create_posix) - 4) { + rc = -EINVAL; + goto err_out1; + } + ksmbd_debug(SMB, "get posix context\n"); + + posix_mode = le32_to_cpu(posix->Mode); + posix_ctxt = 1; + } + } + } + + if (ksmbd_override_fsids(work)) { + rc = -ENOMEM; + goto err_out1; + } + + rc = ksmbd_vfs_kern_path_locked(work, name, LOOKUP_NO_SYMLINKS, &path, 1); + if (!rc) { + file_present = true; + + if (req->CreateOptions & FILE_DELETE_ON_CLOSE_LE) { + /* + * If file exists with under flags, return access + * denied error. + */ + if (req->CreateDisposition == FILE_OVERWRITE_IF_LE || + req->CreateDisposition == FILE_OPEN_IF_LE) { + rc = -EACCES; + goto err_out; + } + + if (!test_tree_conn_flag(tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) { + ksmbd_debug(SMB, + "User does not have write permission\n"); + rc = -EACCES; + goto err_out; + } + } else if (d_is_symlink(path.dentry)) { + rc = -EACCES; + goto err_out; + } + + file_present = true; + idmap = mnt_idmap(path.mnt); + } else { + if (rc != -ENOENT) + goto err_out; + ksmbd_debug(SMB, "can not get linux path for %s, rc = %d\n", + name, rc); + rc = 0; + } + + if (stream_name) { + if (req->CreateOptions & FILE_DIRECTORY_FILE_LE) { + if (s_type == DATA_STREAM) { + rc = -EIO; + rsp->hdr.Status = STATUS_NOT_A_DIRECTORY; + } + } else { + if (file_present && S_ISDIR(d_inode(path.dentry)->i_mode) && + s_type == DATA_STREAM) { + rc = -EIO; + rsp->hdr.Status = STATUS_FILE_IS_A_DIRECTORY; + } + } + + if (req->CreateOptions & FILE_DIRECTORY_FILE_LE && + req->FileAttributes & FILE_ATTRIBUTE_NORMAL_LE) { + rsp->hdr.Status = STATUS_NOT_A_DIRECTORY; + rc = -EIO; + } + + if (rc < 0) + goto err_out; + } + + if (file_present && req->CreateOptions & FILE_NON_DIRECTORY_FILE_LE && + S_ISDIR(d_inode(path.dentry)->i_mode) && + !(req->CreateOptions & FILE_DELETE_ON_CLOSE_LE)) { + ksmbd_debug(SMB, "open() argument is a directory: %s, %x\n", + name, req->CreateOptions); + rsp->hdr.Status = STATUS_FILE_IS_A_DIRECTORY; + rc = -EIO; + goto err_out; + } + + if (file_present && (req->CreateOptions & FILE_DIRECTORY_FILE_LE) && + !(req->CreateDisposition == FILE_CREATE_LE) && + !S_ISDIR(d_inode(path.dentry)->i_mode)) { + rsp->hdr.Status = STATUS_NOT_A_DIRECTORY; + rc = -EIO; + goto err_out; + } + + if (!stream_name && file_present && + req->CreateDisposition == FILE_CREATE_LE) { + rc = -EEXIST; + goto err_out; + } + + daccess = smb_map_generic_desired_access(req->DesiredAccess); + + if (file_present && !(req->CreateOptions & FILE_DELETE_ON_CLOSE_LE)) { + rc = smb_check_perm_dacl(conn, &path, &daccess, + sess->user->uid); + if (rc) + goto err_out; + } + + if (daccess & FILE_MAXIMAL_ACCESS_LE) { + if (!file_present) { + daccess = cpu_to_le32(GENERIC_ALL_FLAGS); + } else { + rc = ksmbd_vfs_query_maximal_access(idmap, + path.dentry, + &daccess); + if (rc) + goto err_out; + already_permitted = true; + } + maximal_access = daccess; + } + + open_flags = smb2_create_open_flags(file_present, daccess, + req->CreateDisposition, + &may_flags); + + if (!test_tree_conn_flag(tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) { + if (open_flags & O_CREAT) { + ksmbd_debug(SMB, + "User does not have write permission\n"); + rc = -EACCES; + goto err_out; + } + } + + /*create file if not present */ + if (!file_present) { + rc = smb2_creat(work, &path, name, open_flags, posix_mode, + req->CreateOptions & FILE_DIRECTORY_FILE_LE); + if (rc) { + if (rc == -ENOENT) { + rc = -EIO; + rsp->hdr.Status = STATUS_OBJECT_PATH_NOT_FOUND; + } + goto err_out; + } + + created = true; + idmap = mnt_idmap(path.mnt); + if (ea_buf) { + if (le32_to_cpu(ea_buf->ccontext.DataLength) < + sizeof(struct smb2_ea_info)) { + rc = -EINVAL; + goto err_out; + } + + rc = smb2_set_ea(&ea_buf->ea, + le32_to_cpu(ea_buf->ccontext.DataLength), + &path); + if (rc == -EOPNOTSUPP) + rc = 0; + else if (rc) + goto err_out; + } + } else if (!already_permitted) { + /* FILE_READ_ATTRIBUTE is allowed without inode_permission, + * because execute(search) permission on a parent directory, + * is already granted. + */ + if (daccess & ~(FILE_READ_ATTRIBUTES_LE | FILE_READ_CONTROL_LE)) { + rc = inode_permission(idmap, + d_inode(path.dentry), + may_flags); + if (rc) + goto err_out; + + if ((daccess & FILE_DELETE_LE) || + (req->CreateOptions & FILE_DELETE_ON_CLOSE_LE)) { + rc = inode_permission(idmap, + d_inode(path.dentry->d_parent), + MAY_EXEC | MAY_WRITE); + if (rc) + goto err_out; + } + } + } + + rc = ksmbd_query_inode_status(d_inode(path.dentry->d_parent)); + if (rc == KSMBD_INODE_STATUS_PENDING_DELETE) { + rc = -EBUSY; + goto err_out; + } + + rc = 0; + filp = dentry_open(&path, open_flags, current_cred()); + if (IS_ERR(filp)) { + rc = PTR_ERR(filp); + pr_err("dentry open for dir failed, rc %d\n", rc); + goto err_out; + } + + if (file_present) { + if (!(open_flags & O_TRUNC)) + file_info = FILE_OPENED; + else + file_info = FILE_OVERWRITTEN; + + if ((req->CreateDisposition & FILE_CREATE_MASK_LE) == + FILE_SUPERSEDE_LE) + file_info = FILE_SUPERSEDED; + } else if (open_flags & O_CREAT) { + file_info = FILE_CREATED; + } + + ksmbd_vfs_set_fadvise(filp, req->CreateOptions); + + /* Obtain Volatile-ID */ + fp = ksmbd_open_fd(work, filp); + if (IS_ERR(fp)) { + fput(filp); + rc = PTR_ERR(fp); + fp = NULL; + goto err_out; + } + + /* Get Persistent-ID */ + ksmbd_open_durable_fd(fp); + if (!has_file_id(fp->persistent_id)) { + rc = -ENOMEM; + goto err_out; + } + + fp->cdoption = req->CreateDisposition; + fp->daccess = daccess; + fp->saccess = req->ShareAccess; + fp->coption = req->CreateOptions; + + /* Set default windows and posix acls if creating new file */ + if (created) { + int posix_acl_rc; + struct inode *inode = d_inode(path.dentry); + + posix_acl_rc = ksmbd_vfs_inherit_posix_acl(idmap, + path.dentry, + d_inode(path.dentry->d_parent)); + if (posix_acl_rc) + ksmbd_debug(SMB, "inherit posix acl failed : %d\n", posix_acl_rc); + + if (test_share_config_flag(work->tcon->share_conf, + KSMBD_SHARE_FLAG_ACL_XATTR)) { + rc = smb_inherit_dacl(conn, &path, sess->user->uid, + sess->user->gid); + } + + if (rc) { + rc = smb2_create_sd_buffer(work, req, &path); + if (rc) { + if (posix_acl_rc) + ksmbd_vfs_set_init_posix_acl(idmap, + path.dentry); + + if (test_share_config_flag(work->tcon->share_conf, + KSMBD_SHARE_FLAG_ACL_XATTR)) { + struct smb_fattr fattr; + struct smb_ntsd *pntsd; + int pntsd_size, ace_num = 0; + + ksmbd_acls_fattr(&fattr, idmap, inode); + if (fattr.cf_acls) + ace_num = fattr.cf_acls->a_count; + if (fattr.cf_dacls) + ace_num += fattr.cf_dacls->a_count; + + pntsd = kmalloc(sizeof(struct smb_ntsd) + + sizeof(struct smb_sid) * 3 + + sizeof(struct smb_acl) + + sizeof(struct smb_ace) * ace_num * 2, + GFP_KERNEL); + if (!pntsd) { + posix_acl_release(fattr.cf_acls); + posix_acl_release(fattr.cf_dacls); + goto err_out; + } + + rc = build_sec_desc(idmap, + pntsd, NULL, 0, + OWNER_SECINFO | + GROUP_SECINFO | + DACL_SECINFO, + &pntsd_size, &fattr); + posix_acl_release(fattr.cf_acls); + posix_acl_release(fattr.cf_dacls); + if (rc) { + kfree(pntsd); + goto err_out; + } + + rc = ksmbd_vfs_set_sd_xattr(conn, + idmap, + path.dentry, + pntsd, + pntsd_size); + kfree(pntsd); + if (rc) + pr_err("failed to store ntacl in xattr : %d\n", + rc); + } + } + } + rc = 0; + } + + if (stream_name) { + rc = smb2_set_stream_name_xattr(&path, + fp, + stream_name, + s_type); + if (rc) + goto err_out; + file_info = FILE_CREATED; + } + + fp->attrib_only = !(req->DesiredAccess & ~(FILE_READ_ATTRIBUTES_LE | + FILE_WRITE_ATTRIBUTES_LE | FILE_SYNCHRONIZE_LE)); + if (!S_ISDIR(file_inode(filp)->i_mode) && open_flags & O_TRUNC && + !fp->attrib_only && !stream_name) { + smb_break_all_oplock(work, fp); + need_truncate = 1; + } + + /* fp should be searchable through ksmbd_inode.m_fp_list + * after daccess, saccess, attrib_only, and stream are + * initialized. + */ + write_lock(&fp->f_ci->m_lock); + list_add(&fp->node, &fp->f_ci->m_fp_list); + write_unlock(&fp->f_ci->m_lock); + + /* Check delete pending among previous fp before oplock break */ + if (ksmbd_inode_pending_delete(fp)) { + rc = -EBUSY; + goto err_out; + } + + share_ret = ksmbd_smb_check_shared_mode(fp->filp, fp); + if (!test_share_config_flag(work->tcon->share_conf, KSMBD_SHARE_FLAG_OPLOCKS) || + (req_op_level == SMB2_OPLOCK_LEVEL_LEASE && + !(conn->vals->capabilities & SMB2_GLOBAL_CAP_LEASING))) { + if (share_ret < 0 && !S_ISDIR(file_inode(fp->filp)->i_mode)) { + rc = share_ret; + goto err_out; + } + } else { + if (req_op_level == SMB2_OPLOCK_LEVEL_LEASE) { + req_op_level = smb2_map_lease_to_oplock(lc->req_state); + ksmbd_debug(SMB, + "lease req for(%s) req oplock state 0x%x, lease state 0x%x\n", + name, req_op_level, lc->req_state); + rc = find_same_lease_key(sess, fp->f_ci, lc); + if (rc) + goto err_out; + } else if (open_flags == O_RDONLY && + (req_op_level == SMB2_OPLOCK_LEVEL_BATCH || + req_op_level == SMB2_OPLOCK_LEVEL_EXCLUSIVE)) + req_op_level = SMB2_OPLOCK_LEVEL_II; + + rc = smb_grant_oplock(work, req_op_level, + fp->persistent_id, fp, + le32_to_cpu(req->hdr.Id.SyncId.TreeId), + lc, share_ret); + if (rc < 0) + goto err_out; + } + + if (req->CreateOptions & FILE_DELETE_ON_CLOSE_LE) + ksmbd_fd_set_delete_on_close(fp, file_info); + + if (need_truncate) { + rc = smb2_create_truncate(&path); + if (rc) + goto err_out; + } + + if (req->CreateContextsOffset) { + struct create_alloc_size_req *az_req; + + az_req = (struct create_alloc_size_req *)smb2_find_context_vals(req, + SMB2_CREATE_ALLOCATION_SIZE, 4); + if (IS_ERR(az_req)) { + rc = PTR_ERR(az_req); + goto err_out; + } else if (az_req) { + loff_t alloc_size; + int err; + + if (le16_to_cpu(az_req->ccontext.DataOffset) + + le32_to_cpu(az_req->ccontext.DataLength) < + sizeof(struct create_alloc_size_req)) { + rc = -EINVAL; + goto err_out; + } + alloc_size = le64_to_cpu(az_req->AllocationSize); + ksmbd_debug(SMB, + "request smb2 create allocate size : %llu\n", + alloc_size); + smb_break_all_levII_oplock(work, fp, 1); + err = vfs_fallocate(fp->filp, FALLOC_FL_KEEP_SIZE, 0, + alloc_size); + if (err < 0) + ksmbd_debug(SMB, + "vfs_fallocate is failed : %d\n", + err); + } + + context = smb2_find_context_vals(req, SMB2_CREATE_QUERY_ON_DISK_ID, 4); + if (IS_ERR(context)) { + rc = PTR_ERR(context); + goto err_out; + } else if (context) { + ksmbd_debug(SMB, "get query on disk id context\n"); + query_disk_id = 1; + } + } + + rc = ksmbd_vfs_getattr(&path, &stat); + if (rc) + goto err_out; + + if (stat.result_mask & STATX_BTIME) + fp->create_time = ksmbd_UnixTimeToNT(stat.btime); + else + fp->create_time = ksmbd_UnixTimeToNT(stat.ctime); + if (req->FileAttributes || fp->f_ci->m_fattr == 0) + fp->f_ci->m_fattr = + cpu_to_le32(smb2_get_dos_mode(&stat, le32_to_cpu(req->FileAttributes))); + + if (!created) + smb2_update_xattrs(tcon, &path, fp); + else + smb2_new_xattrs(tcon, &path, fp); + + memcpy(fp->client_guid, conn->ClientGUID, SMB2_CLIENT_GUID_SIZE); + + rsp->StructureSize = cpu_to_le16(89); + rcu_read_lock(); + opinfo = rcu_dereference(fp->f_opinfo); + rsp->OplockLevel = opinfo != NULL ? opinfo->level : 0; + rcu_read_unlock(); + rsp->Flags = 0; + rsp->CreateAction = cpu_to_le32(file_info); + rsp->CreationTime = cpu_to_le64(fp->create_time); + time = ksmbd_UnixTimeToNT(stat.atime); + rsp->LastAccessTime = cpu_to_le64(time); + time = ksmbd_UnixTimeToNT(stat.mtime); + rsp->LastWriteTime = cpu_to_le64(time); + time = ksmbd_UnixTimeToNT(stat.ctime); + rsp->ChangeTime = cpu_to_le64(time); + rsp->AllocationSize = S_ISDIR(stat.mode) ? 0 : + cpu_to_le64(stat.blocks << 9); + rsp->EndofFile = S_ISDIR(stat.mode) ? 0 : cpu_to_le64(stat.size); + rsp->FileAttributes = fp->f_ci->m_fattr; + + rsp->Reserved2 = 0; + + rsp->PersistentFileId = fp->persistent_id; + rsp->VolatileFileId = fp->volatile_id; + + rsp->CreateContextsOffset = 0; + rsp->CreateContextsLength = 0; + inc_rfc1001_len(work->response_buf, 88); /* StructureSize - 1*/ + + /* If lease is request send lease context response */ + if (opinfo && opinfo->is_lease) { + struct create_context *lease_ccontext; + + ksmbd_debug(SMB, "lease granted on(%s) lease state 0x%x\n", + name, opinfo->o_lease->state); + rsp->OplockLevel = SMB2_OPLOCK_LEVEL_LEASE; + + lease_ccontext = (struct create_context *)rsp->Buffer; + contxt_cnt++; + create_lease_buf(rsp->Buffer, opinfo->o_lease); + le32_add_cpu(&rsp->CreateContextsLength, + conn->vals->create_lease_size); + inc_rfc1001_len(work->response_buf, + conn->vals->create_lease_size); + next_ptr = &lease_ccontext->Next; + next_off = conn->vals->create_lease_size; + } + + if (maximal_access_ctxt) { + struct create_context *mxac_ccontext; + + if (maximal_access == 0) + ksmbd_vfs_query_maximal_access(idmap, + path.dentry, + &maximal_access); + mxac_ccontext = (struct create_context *)(rsp->Buffer + + le32_to_cpu(rsp->CreateContextsLength)); + contxt_cnt++; + create_mxac_rsp_buf(rsp->Buffer + + le32_to_cpu(rsp->CreateContextsLength), + le32_to_cpu(maximal_access)); + le32_add_cpu(&rsp->CreateContextsLength, + conn->vals->create_mxac_size); + inc_rfc1001_len(work->response_buf, + conn->vals->create_mxac_size); + if (next_ptr) + *next_ptr = cpu_to_le32(next_off); + next_ptr = &mxac_ccontext->Next; + next_off = conn->vals->create_mxac_size; + } + + if (query_disk_id) { + struct create_context *disk_id_ccontext; + + disk_id_ccontext = (struct create_context *)(rsp->Buffer + + le32_to_cpu(rsp->CreateContextsLength)); + contxt_cnt++; + create_disk_id_rsp_buf(rsp->Buffer + + le32_to_cpu(rsp->CreateContextsLength), + stat.ino, tcon->id); + le32_add_cpu(&rsp->CreateContextsLength, + conn->vals->create_disk_id_size); + inc_rfc1001_len(work->response_buf, + conn->vals->create_disk_id_size); + if (next_ptr) + *next_ptr = cpu_to_le32(next_off); + next_ptr = &disk_id_ccontext->Next; + next_off = conn->vals->create_disk_id_size; + } + + if (posix_ctxt) { + contxt_cnt++; + create_posix_rsp_buf(rsp->Buffer + + le32_to_cpu(rsp->CreateContextsLength), + fp); + le32_add_cpu(&rsp->CreateContextsLength, + conn->vals->create_posix_size); + inc_rfc1001_len(work->response_buf, + conn->vals->create_posix_size); + if (next_ptr) + *next_ptr = cpu_to_le32(next_off); + } + + if (contxt_cnt > 0) { + rsp->CreateContextsOffset = + cpu_to_le32(offsetof(struct smb2_create_rsp, Buffer)); + } + +err_out: + if (file_present || created) { + inode_unlock(d_inode(path.dentry->d_parent)); + dput(path.dentry); + } + ksmbd_revert_fsids(work); +err_out1: + + if (rc) { + if (rc == -EINVAL) + rsp->hdr.Status = STATUS_INVALID_PARAMETER; + else if (rc == -EOPNOTSUPP) + rsp->hdr.Status = STATUS_NOT_SUPPORTED; + else if (rc == -EACCES || rc == -ESTALE || rc == -EXDEV) + rsp->hdr.Status = STATUS_ACCESS_DENIED; + else if (rc == -ENOENT) + rsp->hdr.Status = STATUS_OBJECT_NAME_INVALID; + else if (rc == -EPERM) + rsp->hdr.Status = STATUS_SHARING_VIOLATION; + else if (rc == -EBUSY) + rsp->hdr.Status = STATUS_DELETE_PENDING; + else if (rc == -EBADF) + rsp->hdr.Status = STATUS_OBJECT_NAME_NOT_FOUND; + else if (rc == -ENOEXEC) + rsp->hdr.Status = STATUS_DUPLICATE_OBJECTID; + else if (rc == -ENXIO) + rsp->hdr.Status = STATUS_NO_SUCH_DEVICE; + else if (rc == -EEXIST) + rsp->hdr.Status = STATUS_OBJECT_NAME_COLLISION; + else if (rc == -EMFILE) + rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES; + if (!rsp->hdr.Status) + rsp->hdr.Status = STATUS_UNEXPECTED_IO_ERROR; + + if (fp) + ksmbd_fd_put(work, fp); + smb2_set_err_rsp(work); + ksmbd_debug(SMB, "Error response: %x\n", rsp->hdr.Status); + } + + kfree(name); + kfree(lc); + + return 0; +} + +static int readdir_info_level_struct_sz(int info_level) +{ + switch (info_level) { + case FILE_FULL_DIRECTORY_INFORMATION: + return sizeof(struct file_full_directory_info); + case FILE_BOTH_DIRECTORY_INFORMATION: + return sizeof(struct file_both_directory_info); + case FILE_DIRECTORY_INFORMATION: + return sizeof(struct file_directory_info); + case FILE_NAMES_INFORMATION: + return sizeof(struct file_names_info); + case FILEID_FULL_DIRECTORY_INFORMATION: + return sizeof(struct file_id_full_dir_info); + case FILEID_BOTH_DIRECTORY_INFORMATION: + return sizeof(struct file_id_both_directory_info); + case SMB_FIND_FILE_POSIX_INFO: + return sizeof(struct smb2_posix_info); + default: + return -EOPNOTSUPP; + } +} + +static int dentry_name(struct ksmbd_dir_info *d_info, int info_level) +{ + switch (info_level) { + case FILE_FULL_DIRECTORY_INFORMATION: + { + struct file_full_directory_info *ffdinfo; + + ffdinfo = (struct file_full_directory_info *)d_info->rptr; + d_info->rptr += le32_to_cpu(ffdinfo->NextEntryOffset); + d_info->name = ffdinfo->FileName; + d_info->name_len = le32_to_cpu(ffdinfo->FileNameLength); + return 0; + } + case FILE_BOTH_DIRECTORY_INFORMATION: + { + struct file_both_directory_info *fbdinfo; + + fbdinfo = (struct file_both_directory_info *)d_info->rptr; + d_info->rptr += le32_to_cpu(fbdinfo->NextEntryOffset); + d_info->name = fbdinfo->FileName; + d_info->name_len = le32_to_cpu(fbdinfo->FileNameLength); + return 0; + } + case FILE_DIRECTORY_INFORMATION: + { + struct file_directory_info *fdinfo; + + fdinfo = (struct file_directory_info *)d_info->rptr; + d_info->rptr += le32_to_cpu(fdinfo->NextEntryOffset); + d_info->name = fdinfo->FileName; + d_info->name_len = le32_to_cpu(fdinfo->FileNameLength); + return 0; + } + case FILE_NAMES_INFORMATION: + { + struct file_names_info *fninfo; + + fninfo = (struct file_names_info *)d_info->rptr; + d_info->rptr += le32_to_cpu(fninfo->NextEntryOffset); + d_info->name = fninfo->FileName; + d_info->name_len = le32_to_cpu(fninfo->FileNameLength); + return 0; + } + case FILEID_FULL_DIRECTORY_INFORMATION: + { + struct file_id_full_dir_info *dinfo; + + dinfo = (struct file_id_full_dir_info *)d_info->rptr; + d_info->rptr += le32_to_cpu(dinfo->NextEntryOffset); + d_info->name = dinfo->FileName; + d_info->name_len = le32_to_cpu(dinfo->FileNameLength); + return 0; + } + case FILEID_BOTH_DIRECTORY_INFORMATION: + { + struct file_id_both_directory_info *fibdinfo; + + fibdinfo = (struct file_id_both_directory_info *)d_info->rptr; + d_info->rptr += le32_to_cpu(fibdinfo->NextEntryOffset); + d_info->name = fibdinfo->FileName; + d_info->name_len = le32_to_cpu(fibdinfo->FileNameLength); + return 0; + } + case SMB_FIND_FILE_POSIX_INFO: + { + struct smb2_posix_info *posix_info; + + posix_info = (struct smb2_posix_info *)d_info->rptr; + d_info->rptr += le32_to_cpu(posix_info->NextEntryOffset); + d_info->name = posix_info->name; + d_info->name_len = le32_to_cpu(posix_info->name_len); + return 0; + } + default: + return -EINVAL; + } +} + +/** + * smb2_populate_readdir_entry() - encode directory entry in smb2 response + * buffer + * @conn: connection instance + * @info_level: smb information level + * @d_info: structure included variables for query dir + * @ksmbd_kstat: ksmbd wrapper of dirent stat information + * + * if directory has many entries, find first can't read it fully. + * find next might be called multiple times to read remaining dir entries + * + * Return: 0 on success, otherwise error + */ +static int smb2_populate_readdir_entry(struct ksmbd_conn *conn, int info_level, + struct ksmbd_dir_info *d_info, + struct ksmbd_kstat *ksmbd_kstat) +{ + int next_entry_offset = 0; + char *conv_name; + int conv_len; + void *kstat; + int struct_sz, rc = 0; + + conv_name = ksmbd_convert_dir_info_name(d_info, + conn->local_nls, + &conv_len); + if (!conv_name) + return -ENOMEM; + + /* Somehow the name has only terminating NULL bytes */ + if (conv_len < 0) { + rc = -EINVAL; + goto free_conv_name; + } + + struct_sz = readdir_info_level_struct_sz(info_level) + conv_len; + next_entry_offset = ALIGN(struct_sz, KSMBD_DIR_INFO_ALIGNMENT); + d_info->last_entry_off_align = next_entry_offset - struct_sz; + + if (next_entry_offset > d_info->out_buf_len) { + d_info->out_buf_len = 0; + rc = -ENOSPC; + goto free_conv_name; + } + + kstat = d_info->wptr; + if (info_level != FILE_NAMES_INFORMATION) + kstat = ksmbd_vfs_init_kstat(&d_info->wptr, ksmbd_kstat); + + switch (info_level) { + case FILE_FULL_DIRECTORY_INFORMATION: + { + struct file_full_directory_info *ffdinfo; + + ffdinfo = (struct file_full_directory_info *)kstat; + ffdinfo->FileNameLength = cpu_to_le32(conv_len); + ffdinfo->EaSize = + smb2_get_reparse_tag_special_file(ksmbd_kstat->kstat->mode); + if (ffdinfo->EaSize) + ffdinfo->ExtFileAttributes = FILE_ATTRIBUTE_REPARSE_POINT_LE; + if (d_info->hide_dot_file && d_info->name[0] == '.') + ffdinfo->ExtFileAttributes |= FILE_ATTRIBUTE_HIDDEN_LE; + memcpy(ffdinfo->FileName, conv_name, conv_len); + ffdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset); + break; + } + case FILE_BOTH_DIRECTORY_INFORMATION: + { + struct file_both_directory_info *fbdinfo; + + fbdinfo = (struct file_both_directory_info *)kstat; + fbdinfo->FileNameLength = cpu_to_le32(conv_len); + fbdinfo->EaSize = + smb2_get_reparse_tag_special_file(ksmbd_kstat->kstat->mode); + if (fbdinfo->EaSize) + fbdinfo->ExtFileAttributes = FILE_ATTRIBUTE_REPARSE_POINT_LE; + fbdinfo->ShortNameLength = 0; + fbdinfo->Reserved = 0; + if (d_info->hide_dot_file && d_info->name[0] == '.') + fbdinfo->ExtFileAttributes |= FILE_ATTRIBUTE_HIDDEN_LE; + memcpy(fbdinfo->FileName, conv_name, conv_len); + fbdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset); + break; + } + case FILE_DIRECTORY_INFORMATION: + { + struct file_directory_info *fdinfo; + + fdinfo = (struct file_directory_info *)kstat; + fdinfo->FileNameLength = cpu_to_le32(conv_len); + if (d_info->hide_dot_file && d_info->name[0] == '.') + fdinfo->ExtFileAttributes |= FILE_ATTRIBUTE_HIDDEN_LE; + memcpy(fdinfo->FileName, conv_name, conv_len); + fdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset); + break; + } + case FILE_NAMES_INFORMATION: + { + struct file_names_info *fninfo; + + fninfo = (struct file_names_info *)kstat; + fninfo->FileNameLength = cpu_to_le32(conv_len); + memcpy(fninfo->FileName, conv_name, conv_len); + fninfo->NextEntryOffset = cpu_to_le32(next_entry_offset); + break; + } + case FILEID_FULL_DIRECTORY_INFORMATION: + { + struct file_id_full_dir_info *dinfo; + + dinfo = (struct file_id_full_dir_info *)kstat; + dinfo->FileNameLength = cpu_to_le32(conv_len); + dinfo->EaSize = + smb2_get_reparse_tag_special_file(ksmbd_kstat->kstat->mode); + if (dinfo->EaSize) + dinfo->ExtFileAttributes = FILE_ATTRIBUTE_REPARSE_POINT_LE; + dinfo->Reserved = 0; + dinfo->UniqueId = cpu_to_le64(ksmbd_kstat->kstat->ino); + if (d_info->hide_dot_file && d_info->name[0] == '.') + dinfo->ExtFileAttributes |= FILE_ATTRIBUTE_HIDDEN_LE; + memcpy(dinfo->FileName, conv_name, conv_len); + dinfo->NextEntryOffset = cpu_to_le32(next_entry_offset); + break; + } + case FILEID_BOTH_DIRECTORY_INFORMATION: + { + struct file_id_both_directory_info *fibdinfo; + + fibdinfo = (struct file_id_both_directory_info *)kstat; + fibdinfo->FileNameLength = cpu_to_le32(conv_len); + fibdinfo->EaSize = + smb2_get_reparse_tag_special_file(ksmbd_kstat->kstat->mode); + if (fibdinfo->EaSize) + fibdinfo->ExtFileAttributes = FILE_ATTRIBUTE_REPARSE_POINT_LE; + fibdinfo->UniqueId = cpu_to_le64(ksmbd_kstat->kstat->ino); + fibdinfo->ShortNameLength = 0; + fibdinfo->Reserved = 0; + fibdinfo->Reserved2 = cpu_to_le16(0); + if (d_info->hide_dot_file && d_info->name[0] == '.') + fibdinfo->ExtFileAttributes |= FILE_ATTRIBUTE_HIDDEN_LE; + memcpy(fibdinfo->FileName, conv_name, conv_len); + fibdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset); + break; + } + case SMB_FIND_FILE_POSIX_INFO: + { + struct smb2_posix_info *posix_info; + u64 time; + + posix_info = (struct smb2_posix_info *)kstat; + posix_info->Ignored = 0; + posix_info->CreationTime = cpu_to_le64(ksmbd_kstat->create_time); + time = ksmbd_UnixTimeToNT(ksmbd_kstat->kstat->ctime); + posix_info->ChangeTime = cpu_to_le64(time); + time = ksmbd_UnixTimeToNT(ksmbd_kstat->kstat->atime); + posix_info->LastAccessTime = cpu_to_le64(time); + time = ksmbd_UnixTimeToNT(ksmbd_kstat->kstat->mtime); + posix_info->LastWriteTime = cpu_to_le64(time); + posix_info->EndOfFile = cpu_to_le64(ksmbd_kstat->kstat->size); + posix_info->AllocationSize = cpu_to_le64(ksmbd_kstat->kstat->blocks << 9); + posix_info->DeviceId = cpu_to_le32(ksmbd_kstat->kstat->rdev); + posix_info->HardLinks = cpu_to_le32(ksmbd_kstat->kstat->nlink); + posix_info->Mode = cpu_to_le32(ksmbd_kstat->kstat->mode & 0777); + posix_info->Inode = cpu_to_le64(ksmbd_kstat->kstat->ino); + posix_info->DosAttributes = + S_ISDIR(ksmbd_kstat->kstat->mode) ? + FILE_ATTRIBUTE_DIRECTORY_LE : FILE_ATTRIBUTE_ARCHIVE_LE; + if (d_info->hide_dot_file && d_info->name[0] == '.') + posix_info->DosAttributes |= FILE_ATTRIBUTE_HIDDEN_LE; + /* + * SidBuffer(32) contain two sids(Domain sid(16), UNIX group sid(16)). + * UNIX sid(16) = revision(1) + num_subauth(1) + authority(6) + + * sub_auth(4 * 1(num_subauth)) + RID(4). + */ + id_to_sid(from_kuid_munged(&init_user_ns, ksmbd_kstat->kstat->uid), + SIDUNIX_USER, (struct smb_sid *)&posix_info->SidBuffer[0]); + id_to_sid(from_kgid_munged(&init_user_ns, ksmbd_kstat->kstat->gid), + SIDUNIX_GROUP, (struct smb_sid *)&posix_info->SidBuffer[16]); + memcpy(posix_info->name, conv_name, conv_len); + posix_info->name_len = cpu_to_le32(conv_len); + posix_info->NextEntryOffset = cpu_to_le32(next_entry_offset); + break; + } + + } /* switch (info_level) */ + + d_info->last_entry_offset = d_info->data_count; + d_info->data_count += next_entry_offset; + d_info->out_buf_len -= next_entry_offset; + d_info->wptr += next_entry_offset; + + ksmbd_debug(SMB, + "info_level : %d, buf_len :%d, next_offset : %d, data_count : %d\n", + info_level, d_info->out_buf_len, + next_entry_offset, d_info->data_count); + +free_conv_name: + kfree(conv_name); + return rc; +} + +struct smb2_query_dir_private { + struct ksmbd_work *work; + char *search_pattern; + struct ksmbd_file *dir_fp; + + struct ksmbd_dir_info *d_info; + int info_level; +}; + +static void lock_dir(struct ksmbd_file *dir_fp) +{ + struct dentry *dir = dir_fp->filp->f_path.dentry; + + inode_lock_nested(d_inode(dir), I_MUTEX_PARENT); +} + +static void unlock_dir(struct ksmbd_file *dir_fp) +{ + struct dentry *dir = dir_fp->filp->f_path.dentry; + + inode_unlock(d_inode(dir)); +} + +static int process_query_dir_entries(struct smb2_query_dir_private *priv) +{ + struct mnt_idmap *idmap = file_mnt_idmap(priv->dir_fp->filp); + struct kstat kstat; + struct ksmbd_kstat ksmbd_kstat; + int rc; + int i; + + for (i = 0; i < priv->d_info->num_entry; i++) { + struct dentry *dent; + + if (dentry_name(priv->d_info, priv->info_level)) + return -EINVAL; + + lock_dir(priv->dir_fp); + dent = lookup_one(idmap, priv->d_info->name, + priv->dir_fp->filp->f_path.dentry, + priv->d_info->name_len); + unlock_dir(priv->dir_fp); + + if (IS_ERR(dent)) { + ksmbd_debug(SMB, "Cannot lookup `%s' [%ld]\n", + priv->d_info->name, + PTR_ERR(dent)); + continue; + } + if (unlikely(d_is_negative(dent))) { + dput(dent); + ksmbd_debug(SMB, "Negative dentry `%s'\n", + priv->d_info->name); + continue; + } + + ksmbd_kstat.kstat = &kstat; + if (priv->info_level != FILE_NAMES_INFORMATION) + ksmbd_vfs_fill_dentry_attrs(priv->work, + idmap, + dent, + &ksmbd_kstat); + + rc = smb2_populate_readdir_entry(priv->work->conn, + priv->info_level, + priv->d_info, + &ksmbd_kstat); + dput(dent); + if (rc) + return rc; + } + return 0; +} + +static int reserve_populate_dentry(struct ksmbd_dir_info *d_info, + int info_level) +{ + int struct_sz; + int conv_len; + int next_entry_offset; + + struct_sz = readdir_info_level_struct_sz(info_level); + if (struct_sz == -EOPNOTSUPP) + return -EOPNOTSUPP; + + conv_len = (d_info->name_len + 1) * 2; + next_entry_offset = ALIGN(struct_sz + conv_len, + KSMBD_DIR_INFO_ALIGNMENT); + + if (next_entry_offset > d_info->out_buf_len) { + d_info->out_buf_len = 0; + return -ENOSPC; + } + + switch (info_level) { + case FILE_FULL_DIRECTORY_INFORMATION: + { + struct file_full_directory_info *ffdinfo; + + ffdinfo = (struct file_full_directory_info *)d_info->wptr; + memcpy(ffdinfo->FileName, d_info->name, d_info->name_len); + ffdinfo->FileName[d_info->name_len] = 0x00; + ffdinfo->FileNameLength = cpu_to_le32(d_info->name_len); + ffdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset); + break; + } + case FILE_BOTH_DIRECTORY_INFORMATION: + { + struct file_both_directory_info *fbdinfo; + + fbdinfo = (struct file_both_directory_info *)d_info->wptr; + memcpy(fbdinfo->FileName, d_info->name, d_info->name_len); + fbdinfo->FileName[d_info->name_len] = 0x00; + fbdinfo->FileNameLength = cpu_to_le32(d_info->name_len); + fbdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset); + break; + } + case FILE_DIRECTORY_INFORMATION: + { + struct file_directory_info *fdinfo; + + fdinfo = (struct file_directory_info *)d_info->wptr; + memcpy(fdinfo->FileName, d_info->name, d_info->name_len); + fdinfo->FileName[d_info->name_len] = 0x00; + fdinfo->FileNameLength = cpu_to_le32(d_info->name_len); + fdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset); + break; + } + case FILE_NAMES_INFORMATION: + { + struct file_names_info *fninfo; + + fninfo = (struct file_names_info *)d_info->wptr; + memcpy(fninfo->FileName, d_info->name, d_info->name_len); + fninfo->FileName[d_info->name_len] = 0x00; + fninfo->FileNameLength = cpu_to_le32(d_info->name_len); + fninfo->NextEntryOffset = cpu_to_le32(next_entry_offset); + break; + } + case FILEID_FULL_DIRECTORY_INFORMATION: + { + struct file_id_full_dir_info *dinfo; + + dinfo = (struct file_id_full_dir_info *)d_info->wptr; + memcpy(dinfo->FileName, d_info->name, d_info->name_len); + dinfo->FileName[d_info->name_len] = 0x00; + dinfo->FileNameLength = cpu_to_le32(d_info->name_len); + dinfo->NextEntryOffset = cpu_to_le32(next_entry_offset); + break; + } + case FILEID_BOTH_DIRECTORY_INFORMATION: + { + struct file_id_both_directory_info *fibdinfo; + + fibdinfo = (struct file_id_both_directory_info *)d_info->wptr; + memcpy(fibdinfo->FileName, d_info->name, d_info->name_len); + fibdinfo->FileName[d_info->name_len] = 0x00; + fibdinfo->FileNameLength = cpu_to_le32(d_info->name_len); + fibdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset); + break; + } + case SMB_FIND_FILE_POSIX_INFO: + { + struct smb2_posix_info *posix_info; + + posix_info = (struct smb2_posix_info *)d_info->wptr; + memcpy(posix_info->name, d_info->name, d_info->name_len); + posix_info->name[d_info->name_len] = 0x00; + posix_info->name_len = cpu_to_le32(d_info->name_len); + posix_info->NextEntryOffset = + cpu_to_le32(next_entry_offset); + break; + } + } /* switch (info_level) */ + + d_info->num_entry++; + d_info->out_buf_len -= next_entry_offset; + d_info->wptr += next_entry_offset; + return 0; +} + +static bool __query_dir(struct dir_context *ctx, const char *name, int namlen, + loff_t offset, u64 ino, unsigned int d_type) +{ + struct ksmbd_readdir_data *buf; + struct smb2_query_dir_private *priv; + struct ksmbd_dir_info *d_info; + int rc; + + buf = container_of(ctx, struct ksmbd_readdir_data, ctx); + priv = buf->private; + d_info = priv->d_info; + + /* dot and dotdot entries are already reserved */ + if (!strcmp(".", name) || !strcmp("..", name)) + return true; + if (ksmbd_share_veto_filename(priv->work->tcon->share_conf, name)) + return true; + if (!match_pattern(name, namlen, priv->search_pattern)) + return true; + + d_info->name = name; + d_info->name_len = namlen; + rc = reserve_populate_dentry(d_info, priv->info_level); + if (rc) + return false; + if (d_info->flags & SMB2_RETURN_SINGLE_ENTRY) + d_info->out_buf_len = 0; + return true; +} + +static int verify_info_level(int info_level) +{ + switch (info_level) { + case FILE_FULL_DIRECTORY_INFORMATION: + case FILE_BOTH_DIRECTORY_INFORMATION: + case FILE_DIRECTORY_INFORMATION: + case FILE_NAMES_INFORMATION: + case FILEID_FULL_DIRECTORY_INFORMATION: + case FILEID_BOTH_DIRECTORY_INFORMATION: + case SMB_FIND_FILE_POSIX_INFO: + break; + default: + return -EOPNOTSUPP; + } + + return 0; +} + +static int smb2_resp_buf_len(struct ksmbd_work *work, unsigned short hdr2_len) +{ + int free_len; + + free_len = (int)(work->response_sz - + (get_rfc1002_len(work->response_buf) + 4)) - hdr2_len; + return free_len; +} + +static int smb2_calc_max_out_buf_len(struct ksmbd_work *work, + unsigned short hdr2_len, + unsigned int out_buf_len) +{ + int free_len; + + if (out_buf_len > work->conn->vals->max_trans_size) + return -EINVAL; + + free_len = smb2_resp_buf_len(work, hdr2_len); + if (free_len < 0) + return -EINVAL; + + return min_t(int, out_buf_len, free_len); +} + +int smb2_query_dir(struct ksmbd_work *work) +{ + struct ksmbd_conn *conn = work->conn; + struct smb2_query_directory_req *req; + struct smb2_query_directory_rsp *rsp; + struct ksmbd_share_config *share = work->tcon->share_conf; + struct ksmbd_file *dir_fp = NULL; + struct ksmbd_dir_info d_info; + int rc = 0; + char *srch_ptr = NULL; + unsigned char srch_flag; + int buffer_sz; + struct smb2_query_dir_private query_dir_private = {NULL, }; + + WORK_BUFFERS(work, req, rsp); + + if (ksmbd_override_fsids(work)) { + rsp->hdr.Status = STATUS_NO_MEMORY; + smb2_set_err_rsp(work); + return -ENOMEM; + } + + rc = verify_info_level(req->FileInformationClass); + if (rc) { + rc = -EFAULT; + goto err_out2; + } + + dir_fp = ksmbd_lookup_fd_slow(work, req->VolatileFileId, req->PersistentFileId); + if (!dir_fp) { + rc = -EBADF; + goto err_out2; + } + + if (!(dir_fp->daccess & FILE_LIST_DIRECTORY_LE) || + inode_permission(file_mnt_idmap(dir_fp->filp), + file_inode(dir_fp->filp), + MAY_READ | MAY_EXEC)) { + pr_err("no right to enumerate directory (%pD)\n", dir_fp->filp); + rc = -EACCES; + goto err_out2; + } + + if (!S_ISDIR(file_inode(dir_fp->filp)->i_mode)) { + pr_err("can't do query dir for a file\n"); + rc = -EINVAL; + goto err_out2; + } + + srch_flag = req->Flags; + srch_ptr = smb_strndup_from_utf16(req->Buffer, + le16_to_cpu(req->FileNameLength), 1, + conn->local_nls); + if (IS_ERR(srch_ptr)) { + ksmbd_debug(SMB, "Search Pattern not found\n"); + rc = -EINVAL; + goto err_out2; + } else { + ksmbd_debug(SMB, "Search pattern is %s\n", srch_ptr); + } + + if (srch_flag & SMB2_REOPEN || srch_flag & SMB2_RESTART_SCANS) { + ksmbd_debug(SMB, "Restart directory scan\n"); + generic_file_llseek(dir_fp->filp, 0, SEEK_SET); + } + + memset(&d_info, 0, sizeof(struct ksmbd_dir_info)); + d_info.wptr = (char *)rsp->Buffer; + d_info.rptr = (char *)rsp->Buffer; + d_info.out_buf_len = + smb2_calc_max_out_buf_len(work, 8, + le32_to_cpu(req->OutputBufferLength)); + if (d_info.out_buf_len < 0) { + rc = -EINVAL; + goto err_out; + } + d_info.flags = srch_flag; + + /* + * reserve dot and dotdot entries in head of buffer + * in first response + */ + rc = ksmbd_populate_dot_dotdot_entries(work, req->FileInformationClass, + dir_fp, &d_info, srch_ptr, + smb2_populate_readdir_entry); + if (rc == -ENOSPC) + rc = 0; + else if (rc) + goto err_out; + + if (test_share_config_flag(share, KSMBD_SHARE_FLAG_HIDE_DOT_FILES)) + d_info.hide_dot_file = true; + + buffer_sz = d_info.out_buf_len; + d_info.rptr = d_info.wptr; + query_dir_private.work = work; + query_dir_private.search_pattern = srch_ptr; + query_dir_private.dir_fp = dir_fp; + query_dir_private.d_info = &d_info; + query_dir_private.info_level = req->FileInformationClass; + dir_fp->readdir_data.private = &query_dir_private; + set_ctx_actor(&dir_fp->readdir_data.ctx, __query_dir); + + rc = iterate_dir(dir_fp->filp, &dir_fp->readdir_data.ctx); + /* + * req->OutputBufferLength is too small to contain even one entry. + * In this case, it immediately returns OutputBufferLength 0 to client. + */ + if (!d_info.out_buf_len && !d_info.num_entry) + goto no_buf_len; + if (rc > 0 || rc == -ENOSPC) + rc = 0; + else if (rc) + goto err_out; + + d_info.wptr = d_info.rptr; + d_info.out_buf_len = buffer_sz; + rc = process_query_dir_entries(&query_dir_private); + if (rc) + goto err_out; + + if (!d_info.data_count && d_info.out_buf_len >= 0) { + if (srch_flag & SMB2_RETURN_SINGLE_ENTRY && !is_asterisk(srch_ptr)) { + rsp->hdr.Status = STATUS_NO_SUCH_FILE; + } else { + dir_fp->dot_dotdot[0] = dir_fp->dot_dotdot[1] = 0; + rsp->hdr.Status = STATUS_NO_MORE_FILES; + } + rsp->StructureSize = cpu_to_le16(9); + rsp->OutputBufferOffset = cpu_to_le16(0); + rsp->OutputBufferLength = cpu_to_le32(0); + rsp->Buffer[0] = 0; + inc_rfc1001_len(work->response_buf, 9); + } else { +no_buf_len: + ((struct file_directory_info *) + ((char *)rsp->Buffer + d_info.last_entry_offset)) + ->NextEntryOffset = 0; + if (d_info.data_count >= d_info.last_entry_off_align) + d_info.data_count -= d_info.last_entry_off_align; + + rsp->StructureSize = cpu_to_le16(9); + rsp->OutputBufferOffset = cpu_to_le16(72); + rsp->OutputBufferLength = cpu_to_le32(d_info.data_count); + inc_rfc1001_len(work->response_buf, 8 + d_info.data_count); + } + + kfree(srch_ptr); + ksmbd_fd_put(work, dir_fp); + ksmbd_revert_fsids(work); + return 0; + +err_out: + pr_err("error while processing smb2 query dir rc = %d\n", rc); + kfree(srch_ptr); + +err_out2: + if (rc == -EINVAL) + rsp->hdr.Status = STATUS_INVALID_PARAMETER; + else if (rc == -EACCES) + rsp->hdr.Status = STATUS_ACCESS_DENIED; + else if (rc == -ENOENT) + rsp->hdr.Status = STATUS_NO_SUCH_FILE; + else if (rc == -EBADF) + rsp->hdr.Status = STATUS_FILE_CLOSED; + else if (rc == -ENOMEM) + rsp->hdr.Status = STATUS_NO_MEMORY; + else if (rc == -EFAULT) + rsp->hdr.Status = STATUS_INVALID_INFO_CLASS; + else if (rc == -EIO) + rsp->hdr.Status = STATUS_FILE_CORRUPT_ERROR; + if (!rsp->hdr.Status) + rsp->hdr.Status = STATUS_UNEXPECTED_IO_ERROR; + + smb2_set_err_rsp(work); + ksmbd_fd_put(work, dir_fp); + ksmbd_revert_fsids(work); + return 0; +} + +/** + * buffer_check_err() - helper function to check buffer errors + * @reqOutputBufferLength: max buffer length expected in command response + * @rsp: query info response buffer contains output buffer length + * @rsp_org: base response buffer pointer in case of chained response + * @infoclass_size: query info class response buffer size + * + * Return: 0 on success, otherwise error + */ +static int buffer_check_err(int reqOutputBufferLength, + struct smb2_query_info_rsp *rsp, + void *rsp_org, int infoclass_size) +{ + if (reqOutputBufferLength < le32_to_cpu(rsp->OutputBufferLength)) { + if (reqOutputBufferLength < infoclass_size) { + pr_err("Invalid Buffer Size Requested\n"); + rsp->hdr.Status = STATUS_INFO_LENGTH_MISMATCH; + *(__be32 *)rsp_org = cpu_to_be32(sizeof(struct smb2_hdr)); + return -EINVAL; + } + + ksmbd_debug(SMB, "Buffer Overflow\n"); + rsp->hdr.Status = STATUS_BUFFER_OVERFLOW; + *(__be32 *)rsp_org = cpu_to_be32(sizeof(struct smb2_hdr) + + reqOutputBufferLength); + rsp->OutputBufferLength = cpu_to_le32(reqOutputBufferLength); + } + return 0; +} + +static void get_standard_info_pipe(struct smb2_query_info_rsp *rsp, + void *rsp_org) +{ + struct smb2_file_standard_info *sinfo; + + sinfo = (struct smb2_file_standard_info *)rsp->Buffer; + + sinfo->AllocationSize = cpu_to_le64(4096); + sinfo->EndOfFile = cpu_to_le64(0); + sinfo->NumberOfLinks = cpu_to_le32(1); + sinfo->DeletePending = 1; + sinfo->Directory = 0; + rsp->OutputBufferLength = + cpu_to_le32(sizeof(struct smb2_file_standard_info)); + inc_rfc1001_len(rsp_org, sizeof(struct smb2_file_standard_info)); +} + +static void get_internal_info_pipe(struct smb2_query_info_rsp *rsp, u64 num, + void *rsp_org) +{ + struct smb2_file_internal_info *file_info; + + file_info = (struct smb2_file_internal_info *)rsp->Buffer; + + /* any unique number */ + file_info->IndexNumber = cpu_to_le64(num | (1ULL << 63)); + rsp->OutputBufferLength = + cpu_to_le32(sizeof(struct smb2_file_internal_info)); + inc_rfc1001_len(rsp_org, sizeof(struct smb2_file_internal_info)); +} + +static int smb2_get_info_file_pipe(struct ksmbd_session *sess, + struct smb2_query_info_req *req, + struct smb2_query_info_rsp *rsp, + void *rsp_org) +{ + u64 id; + int rc; + + /* + * Windows can sometime send query file info request on + * pipe without opening it, checking error condition here + */ + id = req->VolatileFileId; + if (!ksmbd_session_rpc_method(sess, id)) + return -ENOENT; + + ksmbd_debug(SMB, "FileInfoClass %u, FileId 0x%llx\n", + req->FileInfoClass, req->VolatileFileId); + + switch (req->FileInfoClass) { + case FILE_STANDARD_INFORMATION: + get_standard_info_pipe(rsp, rsp_org); + rc = buffer_check_err(le32_to_cpu(req->OutputBufferLength), + rsp, rsp_org, + FILE_STANDARD_INFORMATION_SIZE); + break; + case FILE_INTERNAL_INFORMATION: + get_internal_info_pipe(rsp, id, rsp_org); + rc = buffer_check_err(le32_to_cpu(req->OutputBufferLength), + rsp, rsp_org, + FILE_INTERNAL_INFORMATION_SIZE); + break; + default: + ksmbd_debug(SMB, "smb2_info_file_pipe for %u not supported\n", + req->FileInfoClass); + rc = -EOPNOTSUPP; + } + return rc; +} + +/** + * smb2_get_ea() - handler for smb2 get extended attribute command + * @work: smb work containing query info command buffer + * @fp: ksmbd_file pointer + * @req: get extended attribute request + * @rsp: response buffer pointer + * @rsp_org: base response buffer pointer in case of chained response + * + * Return: 0 on success, otherwise error + */ +static int smb2_get_ea(struct ksmbd_work *work, struct ksmbd_file *fp, + struct smb2_query_info_req *req, + struct smb2_query_info_rsp *rsp, void *rsp_org) +{ + struct smb2_ea_info *eainfo, *prev_eainfo; + char *name, *ptr, *xattr_list = NULL, *buf; + int rc, name_len, value_len, xattr_list_len, idx; + ssize_t buf_free_len, alignment_bytes, next_offset, rsp_data_cnt = 0; + struct smb2_ea_info_req *ea_req = NULL; + const struct path *path; + struct mnt_idmap *idmap = file_mnt_idmap(fp->filp); + + if (!(fp->daccess & FILE_READ_EA_LE)) { + pr_err("Not permitted to read ext attr : 0x%x\n", + fp->daccess); + return -EACCES; + } + + path = &fp->filp->f_path; + /* single EA entry is requested with given user.* name */ + if (req->InputBufferLength) { + if (le32_to_cpu(req->InputBufferLength) < + sizeof(struct smb2_ea_info_req)) + return -EINVAL; + + ea_req = (struct smb2_ea_info_req *)req->Buffer; + } else { + /* need to send all EAs, if no specific EA is requested*/ + if (le32_to_cpu(req->Flags) & SL_RETURN_SINGLE_ENTRY) + ksmbd_debug(SMB, + "All EAs are requested but need to send single EA entry in rsp flags 0x%x\n", + le32_to_cpu(req->Flags)); + } + + buf_free_len = + smb2_calc_max_out_buf_len(work, 8, + le32_to_cpu(req->OutputBufferLength)); + if (buf_free_len < 0) + return -EINVAL; + + rc = ksmbd_vfs_listxattr(path->dentry, &xattr_list); + if (rc < 0) { + rsp->hdr.Status = STATUS_INVALID_HANDLE; + goto out; + } else if (!rc) { /* there is no EA in the file */ + ksmbd_debug(SMB, "no ea data in the file\n"); + goto done; + } + xattr_list_len = rc; + + ptr = (char *)rsp->Buffer; + eainfo = (struct smb2_ea_info *)ptr; + prev_eainfo = eainfo; + idx = 0; + + while (idx < xattr_list_len) { + name = xattr_list + idx; + name_len = strlen(name); + + ksmbd_debug(SMB, "%s, len %d\n", name, name_len); + idx += name_len + 1; + + /* + * CIFS does not support EA other than user.* namespace, + * still keep the framework generic, to list other attrs + * in future. + */ + if (strncmp(name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN)) + continue; + + if (!strncmp(&name[XATTR_USER_PREFIX_LEN], STREAM_PREFIX, + STREAM_PREFIX_LEN)) + continue; + + if (req->InputBufferLength && + strncmp(&name[XATTR_USER_PREFIX_LEN], ea_req->name, + ea_req->EaNameLength)) + continue; + + if (!strncmp(&name[XATTR_USER_PREFIX_LEN], + DOS_ATTRIBUTE_PREFIX, DOS_ATTRIBUTE_PREFIX_LEN)) + continue; + + if (!strncmp(name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN)) + name_len -= XATTR_USER_PREFIX_LEN; + + ptr = (char *)(&eainfo->name + name_len + 1); + buf_free_len -= (offsetof(struct smb2_ea_info, name) + + name_len + 1); + /* bailout if xattr can't fit in buf_free_len */ + value_len = ksmbd_vfs_getxattr(idmap, path->dentry, + name, &buf); + if (value_len <= 0) { + rc = -ENOENT; + rsp->hdr.Status = STATUS_INVALID_HANDLE; + goto out; + } + + buf_free_len -= value_len; + if (buf_free_len < 0) { + kfree(buf); + break; + } + + memcpy(ptr, buf, value_len); + kfree(buf); + + ptr += value_len; + eainfo->Flags = 0; + eainfo->EaNameLength = name_len; + + if (!strncmp(name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN)) + memcpy(eainfo->name, &name[XATTR_USER_PREFIX_LEN], + name_len); + else + memcpy(eainfo->name, name, name_len); + + eainfo->name[name_len] = '\0'; + eainfo->EaValueLength = cpu_to_le16(value_len); + next_offset = offsetof(struct smb2_ea_info, name) + + name_len + 1 + value_len; + + /* align next xattr entry at 4 byte bundary */ + alignment_bytes = ((next_offset + 3) & ~3) - next_offset; + if (alignment_bytes) { + memset(ptr, '\0', alignment_bytes); + ptr += alignment_bytes; + next_offset += alignment_bytes; + buf_free_len -= alignment_bytes; + } + eainfo->NextEntryOffset = cpu_to_le32(next_offset); + prev_eainfo = eainfo; + eainfo = (struct smb2_ea_info *)ptr; + rsp_data_cnt += next_offset; + + if (req->InputBufferLength) { + ksmbd_debug(SMB, "single entry requested\n"); + break; + } + } + + /* no more ea entries */ + prev_eainfo->NextEntryOffset = 0; +done: + rc = 0; + if (rsp_data_cnt == 0) + rsp->hdr.Status = STATUS_NO_EAS_ON_FILE; + rsp->OutputBufferLength = cpu_to_le32(rsp_data_cnt); + inc_rfc1001_len(rsp_org, rsp_data_cnt); +out: + kvfree(xattr_list); + return rc; +} + +static void get_file_access_info(struct smb2_query_info_rsp *rsp, + struct ksmbd_file *fp, void *rsp_org) +{ + struct smb2_file_access_info *file_info; + + file_info = (struct smb2_file_access_info *)rsp->Buffer; + file_info->AccessFlags = fp->daccess; + rsp->OutputBufferLength = + cpu_to_le32(sizeof(struct smb2_file_access_info)); + inc_rfc1001_len(rsp_org, sizeof(struct smb2_file_access_info)); +} + +static int get_file_basic_info(struct smb2_query_info_rsp *rsp, + struct ksmbd_file *fp, void *rsp_org) +{ + struct smb2_file_basic_info *basic_info; + struct kstat stat; + u64 time; + + if (!(fp->daccess & FILE_READ_ATTRIBUTES_LE)) { + pr_err("no right to read the attributes : 0x%x\n", + fp->daccess); + return -EACCES; + } + + basic_info = (struct smb2_file_basic_info *)rsp->Buffer; + generic_fillattr(file_mnt_idmap(fp->filp), file_inode(fp->filp), + &stat); + basic_info->CreationTime = cpu_to_le64(fp->create_time); + time = ksmbd_UnixTimeToNT(stat.atime); + basic_info->LastAccessTime = cpu_to_le64(time); + time = ksmbd_UnixTimeToNT(stat.mtime); + basic_info->LastWriteTime = cpu_to_le64(time); + time = ksmbd_UnixTimeToNT(stat.ctime); + basic_info->ChangeTime = cpu_to_le64(time); + basic_info->Attributes = fp->f_ci->m_fattr; + basic_info->Pad1 = 0; + rsp->OutputBufferLength = + cpu_to_le32(sizeof(struct smb2_file_basic_info)); + inc_rfc1001_len(rsp_org, sizeof(struct smb2_file_basic_info)); + return 0; +} + +static unsigned long long get_allocation_size(struct inode *inode, + struct kstat *stat) +{ + unsigned long long alloc_size = 0; + + if (!S_ISDIR(stat->mode)) { + if ((inode->i_blocks << 9) <= stat->size) + alloc_size = stat->size; + else + alloc_size = inode->i_blocks << 9; + } + + return alloc_size; +} + +static void get_file_standard_info(struct smb2_query_info_rsp *rsp, + struct ksmbd_file *fp, void *rsp_org) +{ + struct smb2_file_standard_info *sinfo; + unsigned int delete_pending; + struct inode *inode; + struct kstat stat; + + inode = file_inode(fp->filp); + generic_fillattr(file_mnt_idmap(fp->filp), inode, &stat); + + sinfo = (struct smb2_file_standard_info *)rsp->Buffer; + delete_pending = ksmbd_inode_pending_delete(fp); + + sinfo->AllocationSize = cpu_to_le64(get_allocation_size(inode, &stat)); + sinfo->EndOfFile = S_ISDIR(stat.mode) ? 0 : cpu_to_le64(stat.size); + sinfo->NumberOfLinks = cpu_to_le32(get_nlink(&stat) - delete_pending); + sinfo->DeletePending = delete_pending; + sinfo->Directory = S_ISDIR(stat.mode) ? 1 : 0; + rsp->OutputBufferLength = + cpu_to_le32(sizeof(struct smb2_file_standard_info)); + inc_rfc1001_len(rsp_org, + sizeof(struct smb2_file_standard_info)); +} + +static void get_file_alignment_info(struct smb2_query_info_rsp *rsp, + void *rsp_org) +{ + struct smb2_file_alignment_info *file_info; + + file_info = (struct smb2_file_alignment_info *)rsp->Buffer; + file_info->AlignmentRequirement = 0; + rsp->OutputBufferLength = + cpu_to_le32(sizeof(struct smb2_file_alignment_info)); + inc_rfc1001_len(rsp_org, + sizeof(struct smb2_file_alignment_info)); +} + +static int get_file_all_info(struct ksmbd_work *work, + struct smb2_query_info_rsp *rsp, + struct ksmbd_file *fp, + void *rsp_org) +{ + struct ksmbd_conn *conn = work->conn; + struct smb2_file_all_info *file_info; + unsigned int delete_pending; + struct inode *inode; + struct kstat stat; + int conv_len; + char *filename; + u64 time; + + if (!(fp->daccess & FILE_READ_ATTRIBUTES_LE)) { + ksmbd_debug(SMB, "no right to read the attributes : 0x%x\n", + fp->daccess); + return -EACCES; + } + + filename = convert_to_nt_pathname(work->tcon->share_conf, &fp->filp->f_path); + if (IS_ERR(filename)) + return PTR_ERR(filename); + + inode = file_inode(fp->filp); + generic_fillattr(file_mnt_idmap(fp->filp), inode, &stat); + + ksmbd_debug(SMB, "filename = %s\n", filename); + delete_pending = ksmbd_inode_pending_delete(fp); + file_info = (struct smb2_file_all_info *)rsp->Buffer; + + file_info->CreationTime = cpu_to_le64(fp->create_time); + time = ksmbd_UnixTimeToNT(stat.atime); + file_info->LastAccessTime = cpu_to_le64(time); + time = ksmbd_UnixTimeToNT(stat.mtime); + file_info->LastWriteTime = cpu_to_le64(time); + time = ksmbd_UnixTimeToNT(stat.ctime); + file_info->ChangeTime = cpu_to_le64(time); + file_info->Attributes = fp->f_ci->m_fattr; + file_info->Pad1 = 0; + file_info->AllocationSize = + cpu_to_le64(get_allocation_size(inode, &stat)); + file_info->EndOfFile = S_ISDIR(stat.mode) ? 0 : cpu_to_le64(stat.size); + file_info->NumberOfLinks = + cpu_to_le32(get_nlink(&stat) - delete_pending); + file_info->DeletePending = delete_pending; + file_info->Directory = S_ISDIR(stat.mode) ? 1 : 0; + file_info->Pad2 = 0; + file_info->IndexNumber = cpu_to_le64(stat.ino); + file_info->EASize = 0; + file_info->AccessFlags = fp->daccess; + file_info->CurrentByteOffset = cpu_to_le64(fp->filp->f_pos); + file_info->Mode = fp->coption; + file_info->AlignmentRequirement = 0; + conv_len = smbConvertToUTF16((__le16 *)file_info->FileName, filename, + PATH_MAX, conn->local_nls, 0); + conv_len *= 2; + file_info->FileNameLength = cpu_to_le32(conv_len); + rsp->OutputBufferLength = + cpu_to_le32(sizeof(struct smb2_file_all_info) + conv_len - 1); + kfree(filename); + inc_rfc1001_len(rsp_org, le32_to_cpu(rsp->OutputBufferLength)); + return 0; +} + +static void get_file_alternate_info(struct ksmbd_work *work, + struct smb2_query_info_rsp *rsp, + struct ksmbd_file *fp, + void *rsp_org) +{ + struct ksmbd_conn *conn = work->conn; + struct smb2_file_alt_name_info *file_info; + struct dentry *dentry = fp->filp->f_path.dentry; + int conv_len; + + spin_lock(&dentry->d_lock); + file_info = (struct smb2_file_alt_name_info *)rsp->Buffer; + conv_len = ksmbd_extract_shortname(conn, + dentry->d_name.name, + file_info->FileName); + spin_unlock(&dentry->d_lock); + file_info->FileNameLength = cpu_to_le32(conv_len); + rsp->OutputBufferLength = + cpu_to_le32(sizeof(struct smb2_file_alt_name_info) + conv_len); + inc_rfc1001_len(rsp_org, le32_to_cpu(rsp->OutputBufferLength)); +} + +static void get_file_stream_info(struct ksmbd_work *work, + struct smb2_query_info_rsp *rsp, + struct ksmbd_file *fp, + void *rsp_org) +{ + struct ksmbd_conn *conn = work->conn; + struct smb2_file_stream_info *file_info; + char *stream_name, *xattr_list = NULL, *stream_buf; + struct kstat stat; + const struct path *path = &fp->filp->f_path; + ssize_t xattr_list_len; + int nbytes = 0, streamlen, stream_name_len, next, idx = 0; + int buf_free_len; + struct smb2_query_info_req *req = ksmbd_req_buf_next(work); + + generic_fillattr(file_mnt_idmap(fp->filp), file_inode(fp->filp), + &stat); + file_info = (struct smb2_file_stream_info *)rsp->Buffer; + + buf_free_len = + smb2_calc_max_out_buf_len(work, 8, + le32_to_cpu(req->OutputBufferLength)); + if (buf_free_len < 0) + goto out; + + xattr_list_len = ksmbd_vfs_listxattr(path->dentry, &xattr_list); + if (xattr_list_len < 0) { + goto out; + } else if (!xattr_list_len) { + ksmbd_debug(SMB, "empty xattr in the file\n"); + goto out; + } + + while (idx < xattr_list_len) { + stream_name = xattr_list + idx; + streamlen = strlen(stream_name); + idx += streamlen + 1; + + ksmbd_debug(SMB, "%s, len %d\n", stream_name, streamlen); + + if (strncmp(&stream_name[XATTR_USER_PREFIX_LEN], + STREAM_PREFIX, STREAM_PREFIX_LEN)) + continue; + + stream_name_len = streamlen - (XATTR_USER_PREFIX_LEN + + STREAM_PREFIX_LEN); + streamlen = stream_name_len; + + /* plus : size */ + streamlen += 1; + stream_buf = kmalloc(streamlen + 1, GFP_KERNEL); + if (!stream_buf) + break; + + streamlen = snprintf(stream_buf, streamlen + 1, + ":%s", &stream_name[XATTR_NAME_STREAM_LEN]); + + next = sizeof(struct smb2_file_stream_info) + streamlen * 2; + if (next > buf_free_len) { + kfree(stream_buf); + break; + } + + file_info = (struct smb2_file_stream_info *)&rsp->Buffer[nbytes]; + streamlen = smbConvertToUTF16((__le16 *)file_info->StreamName, + stream_buf, streamlen, + conn->local_nls, 0); + streamlen *= 2; + kfree(stream_buf); + file_info->StreamNameLength = cpu_to_le32(streamlen); + file_info->StreamSize = cpu_to_le64(stream_name_len); + file_info->StreamAllocationSize = cpu_to_le64(stream_name_len); + + nbytes += next; + buf_free_len -= next; + file_info->NextEntryOffset = cpu_to_le32(next); + } + +out: + if (!S_ISDIR(stat.mode) && + buf_free_len >= sizeof(struct smb2_file_stream_info) + 7 * 2) { + file_info = (struct smb2_file_stream_info *) + &rsp->Buffer[nbytes]; + streamlen = smbConvertToUTF16((__le16 *)file_info->StreamName, + "::$DATA", 7, conn->local_nls, 0); + streamlen *= 2; + file_info->StreamNameLength = cpu_to_le32(streamlen); + file_info->StreamSize = cpu_to_le64(stat.size); + file_info->StreamAllocationSize = cpu_to_le64(stat.blocks << 9); + nbytes += sizeof(struct smb2_file_stream_info) + streamlen; + } + + /* last entry offset should be 0 */ + file_info->NextEntryOffset = 0; + kvfree(xattr_list); + + rsp->OutputBufferLength = cpu_to_le32(nbytes); + inc_rfc1001_len(rsp_org, nbytes); +} + +static void get_file_internal_info(struct smb2_query_info_rsp *rsp, + struct ksmbd_file *fp, void *rsp_org) +{ + struct smb2_file_internal_info *file_info; + struct kstat stat; + + generic_fillattr(file_mnt_idmap(fp->filp), file_inode(fp->filp), + &stat); + file_info = (struct smb2_file_internal_info *)rsp->Buffer; + file_info->IndexNumber = cpu_to_le64(stat.ino); + rsp->OutputBufferLength = + cpu_to_le32(sizeof(struct smb2_file_internal_info)); + inc_rfc1001_len(rsp_org, sizeof(struct smb2_file_internal_info)); +} + +static int get_file_network_open_info(struct smb2_query_info_rsp *rsp, + struct ksmbd_file *fp, void *rsp_org) +{ + struct smb2_file_ntwrk_info *file_info; + struct inode *inode; + struct kstat stat; + u64 time; + + if (!(fp->daccess & FILE_READ_ATTRIBUTES_LE)) { + pr_err("no right to read the attributes : 0x%x\n", + fp->daccess); + return -EACCES; + } + + file_info = (struct smb2_file_ntwrk_info *)rsp->Buffer; + + inode = file_inode(fp->filp); + generic_fillattr(file_mnt_idmap(fp->filp), inode, &stat); + + file_info->CreationTime = cpu_to_le64(fp->create_time); + time = ksmbd_UnixTimeToNT(stat.atime); + file_info->LastAccessTime = cpu_to_le64(time); + time = ksmbd_UnixTimeToNT(stat.mtime); + file_info->LastWriteTime = cpu_to_le64(time); + time = ksmbd_UnixTimeToNT(stat.ctime); + file_info->ChangeTime = cpu_to_le64(time); + file_info->Attributes = fp->f_ci->m_fattr; + file_info->AllocationSize = + cpu_to_le64(get_allocation_size(inode, &stat)); + file_info->EndOfFile = S_ISDIR(stat.mode) ? 0 : cpu_to_le64(stat.size); + file_info->Reserved = cpu_to_le32(0); + rsp->OutputBufferLength = + cpu_to_le32(sizeof(struct smb2_file_ntwrk_info)); + inc_rfc1001_len(rsp_org, sizeof(struct smb2_file_ntwrk_info)); + return 0; +} + +static void get_file_ea_info(struct smb2_query_info_rsp *rsp, void *rsp_org) +{ + struct smb2_file_ea_info *file_info; + + file_info = (struct smb2_file_ea_info *)rsp->Buffer; + file_info->EASize = 0; + rsp->OutputBufferLength = + cpu_to_le32(sizeof(struct smb2_file_ea_info)); + inc_rfc1001_len(rsp_org, sizeof(struct smb2_file_ea_info)); +} + +static void get_file_position_info(struct smb2_query_info_rsp *rsp, + struct ksmbd_file *fp, void *rsp_org) +{ + struct smb2_file_pos_info *file_info; + + file_info = (struct smb2_file_pos_info *)rsp->Buffer; + file_info->CurrentByteOffset = cpu_to_le64(fp->filp->f_pos); + rsp->OutputBufferLength = + cpu_to_le32(sizeof(struct smb2_file_pos_info)); + inc_rfc1001_len(rsp_org, sizeof(struct smb2_file_pos_info)); +} + +static void get_file_mode_info(struct smb2_query_info_rsp *rsp, + struct ksmbd_file *fp, void *rsp_org) +{ + struct smb2_file_mode_info *file_info; + + file_info = (struct smb2_file_mode_info *)rsp->Buffer; + file_info->Mode = fp->coption & FILE_MODE_INFO_MASK; + rsp->OutputBufferLength = + cpu_to_le32(sizeof(struct smb2_file_mode_info)); + inc_rfc1001_len(rsp_org, sizeof(struct smb2_file_mode_info)); +} + +static void get_file_compression_info(struct smb2_query_info_rsp *rsp, + struct ksmbd_file *fp, void *rsp_org) +{ + struct smb2_file_comp_info *file_info; + struct kstat stat; + + generic_fillattr(file_mnt_idmap(fp->filp), file_inode(fp->filp), + &stat); + + file_info = (struct smb2_file_comp_info *)rsp->Buffer; + file_info->CompressedFileSize = cpu_to_le64(stat.blocks << 9); + file_info->CompressionFormat = COMPRESSION_FORMAT_NONE; + file_info->CompressionUnitShift = 0; + file_info->ChunkShift = 0; + file_info->ClusterShift = 0; + memset(&file_info->Reserved[0], 0, 3); + + rsp->OutputBufferLength = + cpu_to_le32(sizeof(struct smb2_file_comp_info)); + inc_rfc1001_len(rsp_org, sizeof(struct smb2_file_comp_info)); +} + +static int get_file_attribute_tag_info(struct smb2_query_info_rsp *rsp, + struct ksmbd_file *fp, void *rsp_org) +{ + struct smb2_file_attr_tag_info *file_info; + + if (!(fp->daccess & FILE_READ_ATTRIBUTES_LE)) { + pr_err("no right to read the attributes : 0x%x\n", + fp->daccess); + return -EACCES; + } + + file_info = (struct smb2_file_attr_tag_info *)rsp->Buffer; + file_info->FileAttributes = fp->f_ci->m_fattr; + file_info->ReparseTag = 0; + rsp->OutputBufferLength = + cpu_to_le32(sizeof(struct smb2_file_attr_tag_info)); + inc_rfc1001_len(rsp_org, sizeof(struct smb2_file_attr_tag_info)); + return 0; +} + +static int find_file_posix_info(struct smb2_query_info_rsp *rsp, + struct ksmbd_file *fp, void *rsp_org) +{ + struct smb311_posix_qinfo *file_info; + struct inode *inode = file_inode(fp->filp); + struct mnt_idmap *idmap = file_mnt_idmap(fp->filp); + vfsuid_t vfsuid = i_uid_into_vfsuid(idmap, inode); + vfsgid_t vfsgid = i_gid_into_vfsgid(idmap, inode); + u64 time; + int out_buf_len = sizeof(struct smb311_posix_qinfo) + 32; + + file_info = (struct smb311_posix_qinfo *)rsp->Buffer; + file_info->CreationTime = cpu_to_le64(fp->create_time); + time = ksmbd_UnixTimeToNT(inode->i_atime); + file_info->LastAccessTime = cpu_to_le64(time); + time = ksmbd_UnixTimeToNT(inode->i_mtime); + file_info->LastWriteTime = cpu_to_le64(time); + time = ksmbd_UnixTimeToNT(inode->i_ctime); + file_info->ChangeTime = cpu_to_le64(time); + file_info->DosAttributes = fp->f_ci->m_fattr; + file_info->Inode = cpu_to_le64(inode->i_ino); + file_info->EndOfFile = cpu_to_le64(inode->i_size); + file_info->AllocationSize = cpu_to_le64(inode->i_blocks << 9); + file_info->HardLinks = cpu_to_le32(inode->i_nlink); + file_info->Mode = cpu_to_le32(inode->i_mode & 0777); + file_info->DeviceId = cpu_to_le32(inode->i_rdev); + + /* + * Sids(32) contain two sids(Domain sid(16), UNIX group sid(16)). + * UNIX sid(16) = revision(1) + num_subauth(1) + authority(6) + + * sub_auth(4 * 1(num_subauth)) + RID(4). + */ + id_to_sid(from_kuid_munged(&init_user_ns, vfsuid_into_kuid(vfsuid)), + SIDUNIX_USER, (struct smb_sid *)&file_info->Sids[0]); + id_to_sid(from_kgid_munged(&init_user_ns, vfsgid_into_kgid(vfsgid)), + SIDUNIX_GROUP, (struct smb_sid *)&file_info->Sids[16]); + + rsp->OutputBufferLength = cpu_to_le32(out_buf_len); + inc_rfc1001_len(rsp_org, out_buf_len); + return out_buf_len; +} + +static int smb2_get_info_file(struct ksmbd_work *work, + struct smb2_query_info_req *req, + struct smb2_query_info_rsp *rsp) +{ + struct ksmbd_file *fp; + int fileinfoclass = 0; + int rc = 0; + int file_infoclass_size; + unsigned int id = KSMBD_NO_FID, pid = KSMBD_NO_FID; + + if (test_share_config_flag(work->tcon->share_conf, + KSMBD_SHARE_FLAG_PIPE)) { + /* smb2 info file called for pipe */ + return smb2_get_info_file_pipe(work->sess, req, rsp, + work->response_buf); + } + + if (work->next_smb2_rcv_hdr_off) { + if (!has_file_id(req->VolatileFileId)) { + ksmbd_debug(SMB, "Compound request set FID = %llu\n", + work->compound_fid); + id = work->compound_fid; + pid = work->compound_pfid; + } + } + + if (!has_file_id(id)) { + id = req->VolatileFileId; + pid = req->PersistentFileId; + } + + fp = ksmbd_lookup_fd_slow(work, id, pid); + if (!fp) + return -ENOENT; + + fileinfoclass = req->FileInfoClass; + + switch (fileinfoclass) { + case FILE_ACCESS_INFORMATION: + get_file_access_info(rsp, fp, work->response_buf); + file_infoclass_size = FILE_ACCESS_INFORMATION_SIZE; + break; + + case FILE_BASIC_INFORMATION: + rc = get_file_basic_info(rsp, fp, work->response_buf); + file_infoclass_size = FILE_BASIC_INFORMATION_SIZE; + break; + + case FILE_STANDARD_INFORMATION: + get_file_standard_info(rsp, fp, work->response_buf); + file_infoclass_size = FILE_STANDARD_INFORMATION_SIZE; + break; + + case FILE_ALIGNMENT_INFORMATION: + get_file_alignment_info(rsp, work->response_buf); + file_infoclass_size = FILE_ALIGNMENT_INFORMATION_SIZE; + break; + + case FILE_ALL_INFORMATION: + rc = get_file_all_info(work, rsp, fp, work->response_buf); + file_infoclass_size = FILE_ALL_INFORMATION_SIZE; + break; + + case FILE_ALTERNATE_NAME_INFORMATION: + get_file_alternate_info(work, rsp, fp, work->response_buf); + file_infoclass_size = FILE_ALTERNATE_NAME_INFORMATION_SIZE; + break; + + case FILE_STREAM_INFORMATION: + get_file_stream_info(work, rsp, fp, work->response_buf); + file_infoclass_size = FILE_STREAM_INFORMATION_SIZE; + break; + + case FILE_INTERNAL_INFORMATION: + get_file_internal_info(rsp, fp, work->response_buf); + file_infoclass_size = FILE_INTERNAL_INFORMATION_SIZE; + break; + + case FILE_NETWORK_OPEN_INFORMATION: + rc = get_file_network_open_info(rsp, fp, work->response_buf); + file_infoclass_size = FILE_NETWORK_OPEN_INFORMATION_SIZE; + break; + + case FILE_EA_INFORMATION: + get_file_ea_info(rsp, work->response_buf); + file_infoclass_size = FILE_EA_INFORMATION_SIZE; + break; + + case FILE_FULL_EA_INFORMATION: + rc = smb2_get_ea(work, fp, req, rsp, work->response_buf); + file_infoclass_size = FILE_FULL_EA_INFORMATION_SIZE; + break; + + case FILE_POSITION_INFORMATION: + get_file_position_info(rsp, fp, work->response_buf); + file_infoclass_size = FILE_POSITION_INFORMATION_SIZE; + break; + + case FILE_MODE_INFORMATION: + get_file_mode_info(rsp, fp, work->response_buf); + file_infoclass_size = FILE_MODE_INFORMATION_SIZE; + break; + + case FILE_COMPRESSION_INFORMATION: + get_file_compression_info(rsp, fp, work->response_buf); + file_infoclass_size = FILE_COMPRESSION_INFORMATION_SIZE; + break; + + case FILE_ATTRIBUTE_TAG_INFORMATION: + rc = get_file_attribute_tag_info(rsp, fp, work->response_buf); + file_infoclass_size = FILE_ATTRIBUTE_TAG_INFORMATION_SIZE; + break; + case SMB_FIND_FILE_POSIX_INFO: + if (!work->tcon->posix_extensions) { + pr_err("client doesn't negotiate with SMB3.1.1 POSIX Extensions\n"); + rc = -EOPNOTSUPP; + } else { + file_infoclass_size = find_file_posix_info(rsp, fp, + work->response_buf); + } + break; + default: + ksmbd_debug(SMB, "fileinfoclass %d not supported yet\n", + fileinfoclass); + rc = -EOPNOTSUPP; + } + if (!rc) + rc = buffer_check_err(le32_to_cpu(req->OutputBufferLength), + rsp, work->response_buf, + file_infoclass_size); + ksmbd_fd_put(work, fp); + return rc; +} + +static int smb2_get_info_filesystem(struct ksmbd_work *work, + struct smb2_query_info_req *req, + struct smb2_query_info_rsp *rsp) +{ + struct ksmbd_session *sess = work->sess; + struct ksmbd_conn *conn = work->conn; + struct ksmbd_share_config *share = work->tcon->share_conf; + int fsinfoclass = 0; + struct kstatfs stfs; + struct path path; + int rc = 0, len; + int fs_infoclass_size = 0; + + if (!share->path) + return -EIO; + + rc = kern_path(share->path, LOOKUP_NO_SYMLINKS, &path); + if (rc) { + pr_err("cannot create vfs path\n"); + return -EIO; + } + + rc = vfs_statfs(&path, &stfs); + if (rc) { + pr_err("cannot do stat of path %s\n", share->path); + path_put(&path); + return -EIO; + } + + fsinfoclass = req->FileInfoClass; + + switch (fsinfoclass) { + case FS_DEVICE_INFORMATION: + { + struct filesystem_device_info *info; + + info = (struct filesystem_device_info *)rsp->Buffer; + + info->DeviceType = cpu_to_le32(stfs.f_type); + info->DeviceCharacteristics = cpu_to_le32(0x00000020); + rsp->OutputBufferLength = cpu_to_le32(8); + inc_rfc1001_len(work->response_buf, 8); + fs_infoclass_size = FS_DEVICE_INFORMATION_SIZE; + break; + } + case FS_ATTRIBUTE_INFORMATION: + { + struct filesystem_attribute_info *info; + size_t sz; + + info = (struct filesystem_attribute_info *)rsp->Buffer; + info->Attributes = cpu_to_le32(FILE_SUPPORTS_OBJECT_IDS | + FILE_PERSISTENT_ACLS | + FILE_UNICODE_ON_DISK | + FILE_CASE_PRESERVED_NAMES | + FILE_CASE_SENSITIVE_SEARCH | + FILE_SUPPORTS_BLOCK_REFCOUNTING); + + info->Attributes |= cpu_to_le32(server_conf.share_fake_fscaps); + + if (test_share_config_flag(work->tcon->share_conf, + KSMBD_SHARE_FLAG_STREAMS)) + info->Attributes |= cpu_to_le32(FILE_NAMED_STREAMS); + + info->MaxPathNameComponentLength = cpu_to_le32(stfs.f_namelen); + len = smbConvertToUTF16((__le16 *)info->FileSystemName, + "NTFS", PATH_MAX, conn->local_nls, 0); + len = len * 2; + info->FileSystemNameLen = cpu_to_le32(len); + sz = sizeof(struct filesystem_attribute_info) - 2 + len; + rsp->OutputBufferLength = cpu_to_le32(sz); + inc_rfc1001_len(work->response_buf, sz); + fs_infoclass_size = FS_ATTRIBUTE_INFORMATION_SIZE; + break; + } + case FS_VOLUME_INFORMATION: + { + struct filesystem_vol_info *info; + size_t sz; + unsigned int serial_crc = 0; + + info = (struct filesystem_vol_info *)(rsp->Buffer); + info->VolumeCreationTime = 0; + serial_crc = crc32_le(serial_crc, share->name, + strlen(share->name)); + serial_crc = crc32_le(serial_crc, share->path, + strlen(share->path)); + serial_crc = crc32_le(serial_crc, ksmbd_netbios_name(), + strlen(ksmbd_netbios_name())); + /* Taking dummy value of serial number*/ + info->SerialNumber = cpu_to_le32(serial_crc); + len = smbConvertToUTF16((__le16 *)info->VolumeLabel, + share->name, PATH_MAX, + conn->local_nls, 0); + len = len * 2; + info->VolumeLabelSize = cpu_to_le32(len); + info->Reserved = 0; + sz = sizeof(struct filesystem_vol_info) - 2 + len; + rsp->OutputBufferLength = cpu_to_le32(sz); + inc_rfc1001_len(work->response_buf, sz); + fs_infoclass_size = FS_VOLUME_INFORMATION_SIZE; + break; + } + case FS_SIZE_INFORMATION: + { + struct filesystem_info *info; + + info = (struct filesystem_info *)(rsp->Buffer); + info->TotalAllocationUnits = cpu_to_le64(stfs.f_blocks); + info->FreeAllocationUnits = cpu_to_le64(stfs.f_bfree); + info->SectorsPerAllocationUnit = cpu_to_le32(1); + info->BytesPerSector = cpu_to_le32(stfs.f_bsize); + rsp->OutputBufferLength = cpu_to_le32(24); + inc_rfc1001_len(work->response_buf, 24); + fs_infoclass_size = FS_SIZE_INFORMATION_SIZE; + break; + } + case FS_FULL_SIZE_INFORMATION: + { + struct smb2_fs_full_size_info *info; + + info = (struct smb2_fs_full_size_info *)(rsp->Buffer); + info->TotalAllocationUnits = cpu_to_le64(stfs.f_blocks); + info->CallerAvailableAllocationUnits = + cpu_to_le64(stfs.f_bavail); + info->ActualAvailableAllocationUnits = + cpu_to_le64(stfs.f_bfree); + info->SectorsPerAllocationUnit = cpu_to_le32(1); + info->BytesPerSector = cpu_to_le32(stfs.f_bsize); + rsp->OutputBufferLength = cpu_to_le32(32); + inc_rfc1001_len(work->response_buf, 32); + fs_infoclass_size = FS_FULL_SIZE_INFORMATION_SIZE; + break; + } + case FS_OBJECT_ID_INFORMATION: + { + struct object_id_info *info; + + info = (struct object_id_info *)(rsp->Buffer); + + if (!user_guest(sess->user)) + memcpy(info->objid, user_passkey(sess->user), 16); + else + memset(info->objid, 0, 16); + + info->extended_info.magic = cpu_to_le32(EXTENDED_INFO_MAGIC); + info->extended_info.version = cpu_to_le32(1); + info->extended_info.release = cpu_to_le32(1); + info->extended_info.rel_date = 0; + memcpy(info->extended_info.version_string, "1.1.0", strlen("1.1.0")); + rsp->OutputBufferLength = cpu_to_le32(64); + inc_rfc1001_len(work->response_buf, 64); + fs_infoclass_size = FS_OBJECT_ID_INFORMATION_SIZE; + break; + } + case FS_SECTOR_SIZE_INFORMATION: + { + struct smb3_fs_ss_info *info; + unsigned int sector_size = + min_t(unsigned int, path.mnt->mnt_sb->s_blocksize, 4096); + + info = (struct smb3_fs_ss_info *)(rsp->Buffer); + + info->LogicalBytesPerSector = cpu_to_le32(sector_size); + info->PhysicalBytesPerSectorForAtomicity = + cpu_to_le32(sector_size); + info->PhysicalBytesPerSectorForPerf = cpu_to_le32(sector_size); + info->FSEffPhysicalBytesPerSectorForAtomicity = + cpu_to_le32(sector_size); + info->Flags = cpu_to_le32(SSINFO_FLAGS_ALIGNED_DEVICE | + SSINFO_FLAGS_PARTITION_ALIGNED_ON_DEVICE); + info->ByteOffsetForSectorAlignment = 0; + info->ByteOffsetForPartitionAlignment = 0; + rsp->OutputBufferLength = cpu_to_le32(28); + inc_rfc1001_len(work->response_buf, 28); + fs_infoclass_size = FS_SECTOR_SIZE_INFORMATION_SIZE; + break; + } + case FS_CONTROL_INFORMATION: + { + /* + * TODO : The current implementation is based on + * test result with win7(NTFS) server. It's need to + * modify this to get valid Quota values + * from Linux kernel + */ + struct smb2_fs_control_info *info; + + info = (struct smb2_fs_control_info *)(rsp->Buffer); + info->FreeSpaceStartFiltering = 0; + info->FreeSpaceThreshold = 0; + info->FreeSpaceStopFiltering = 0; + info->DefaultQuotaThreshold = cpu_to_le64(SMB2_NO_FID); + info->DefaultQuotaLimit = cpu_to_le64(SMB2_NO_FID); + info->Padding = 0; + rsp->OutputBufferLength = cpu_to_le32(48); + inc_rfc1001_len(work->response_buf, 48); + fs_infoclass_size = FS_CONTROL_INFORMATION_SIZE; + break; + } + case FS_POSIX_INFORMATION: + { + struct filesystem_posix_info *info; + + if (!work->tcon->posix_extensions) { + pr_err("client doesn't negotiate with SMB3.1.1 POSIX Extensions\n"); + rc = -EOPNOTSUPP; + } else { + info = (struct filesystem_posix_info *)(rsp->Buffer); + info->OptimalTransferSize = cpu_to_le32(stfs.f_bsize); + info->BlockSize = cpu_to_le32(stfs.f_bsize); + info->TotalBlocks = cpu_to_le64(stfs.f_blocks); + info->BlocksAvail = cpu_to_le64(stfs.f_bfree); + info->UserBlocksAvail = cpu_to_le64(stfs.f_bavail); + info->TotalFileNodes = cpu_to_le64(stfs.f_files); + info->FreeFileNodes = cpu_to_le64(stfs.f_ffree); + rsp->OutputBufferLength = cpu_to_le32(56); + inc_rfc1001_len(work->response_buf, 56); + fs_infoclass_size = FS_POSIX_INFORMATION_SIZE; + } + break; + } + default: + path_put(&path); + return -EOPNOTSUPP; + } + rc = buffer_check_err(le32_to_cpu(req->OutputBufferLength), + rsp, work->response_buf, + fs_infoclass_size); + path_put(&path); + return rc; +} + +static int smb2_get_info_sec(struct ksmbd_work *work, + struct smb2_query_info_req *req, + struct smb2_query_info_rsp *rsp) +{ + struct ksmbd_file *fp; + struct mnt_idmap *idmap; + struct smb_ntsd *pntsd = (struct smb_ntsd *)rsp->Buffer, *ppntsd = NULL; + struct smb_fattr fattr = {{0}}; + struct inode *inode; + __u32 secdesclen = 0; + unsigned int id = KSMBD_NO_FID, pid = KSMBD_NO_FID; + int addition_info = le32_to_cpu(req->AdditionalInformation); + int rc = 0, ppntsd_size = 0; + + if (addition_info & ~(OWNER_SECINFO | GROUP_SECINFO | DACL_SECINFO | + PROTECTED_DACL_SECINFO | + UNPROTECTED_DACL_SECINFO)) { + ksmbd_debug(SMB, "Unsupported addition info: 0x%x)\n", + addition_info); + + pntsd->revision = cpu_to_le16(1); + pntsd->type = cpu_to_le16(SELF_RELATIVE | DACL_PROTECTED); + pntsd->osidoffset = 0; + pntsd->gsidoffset = 0; + pntsd->sacloffset = 0; + pntsd->dacloffset = 0; + + secdesclen = sizeof(struct smb_ntsd); + rsp->OutputBufferLength = cpu_to_le32(secdesclen); + inc_rfc1001_len(work->response_buf, secdesclen); + + return 0; + } + + if (work->next_smb2_rcv_hdr_off) { + if (!has_file_id(req->VolatileFileId)) { + ksmbd_debug(SMB, "Compound request set FID = %llu\n", + work->compound_fid); + id = work->compound_fid; + pid = work->compound_pfid; + } + } + + if (!has_file_id(id)) { + id = req->VolatileFileId; + pid = req->PersistentFileId; + } + + fp = ksmbd_lookup_fd_slow(work, id, pid); + if (!fp) + return -ENOENT; + + idmap = file_mnt_idmap(fp->filp); + inode = file_inode(fp->filp); + ksmbd_acls_fattr(&fattr, idmap, inode); + + if (test_share_config_flag(work->tcon->share_conf, + KSMBD_SHARE_FLAG_ACL_XATTR)) + ppntsd_size = ksmbd_vfs_get_sd_xattr(work->conn, idmap, + fp->filp->f_path.dentry, + &ppntsd); + + /* Check if sd buffer size exceeds response buffer size */ + if (smb2_resp_buf_len(work, 8) > ppntsd_size) + rc = build_sec_desc(idmap, pntsd, ppntsd, ppntsd_size, + addition_info, &secdesclen, &fattr); + posix_acl_release(fattr.cf_acls); + posix_acl_release(fattr.cf_dacls); + kfree(ppntsd); + ksmbd_fd_put(work, fp); + if (rc) + return rc; + + rsp->OutputBufferLength = cpu_to_le32(secdesclen); + inc_rfc1001_len(work->response_buf, secdesclen); + return 0; +} + +/** + * smb2_query_info() - handler for smb2 query info command + * @work: smb work containing query info request buffer + * + * Return: 0 on success, otherwise error + */ +int smb2_query_info(struct ksmbd_work *work) +{ + struct smb2_query_info_req *req; + struct smb2_query_info_rsp *rsp; + int rc = 0; + + WORK_BUFFERS(work, req, rsp); + + ksmbd_debug(SMB, "GOT query info request\n"); + + switch (req->InfoType) { + case SMB2_O_INFO_FILE: + ksmbd_debug(SMB, "GOT SMB2_O_INFO_FILE\n"); + rc = smb2_get_info_file(work, req, rsp); + break; + case SMB2_O_INFO_FILESYSTEM: + ksmbd_debug(SMB, "GOT SMB2_O_INFO_FILESYSTEM\n"); + rc = smb2_get_info_filesystem(work, req, rsp); + break; + case SMB2_O_INFO_SECURITY: + ksmbd_debug(SMB, "GOT SMB2_O_INFO_SECURITY\n"); + rc = smb2_get_info_sec(work, req, rsp); + break; + default: + ksmbd_debug(SMB, "InfoType %d not supported yet\n", + req->InfoType); + rc = -EOPNOTSUPP; + } + + if (rc < 0) { + if (rc == -EACCES) + rsp->hdr.Status = STATUS_ACCESS_DENIED; + else if (rc == -ENOENT) + rsp->hdr.Status = STATUS_FILE_CLOSED; + else if (rc == -EIO) + rsp->hdr.Status = STATUS_UNEXPECTED_IO_ERROR; + else if (rc == -EOPNOTSUPP || rsp->hdr.Status == 0) + rsp->hdr.Status = STATUS_INVALID_INFO_CLASS; + smb2_set_err_rsp(work); + + ksmbd_debug(SMB, "error while processing smb2 query rc = %d\n", + rc); + return rc; + } + rsp->StructureSize = cpu_to_le16(9); + rsp->OutputBufferOffset = cpu_to_le16(72); + inc_rfc1001_len(work->response_buf, 8); + return 0; +} + +/** + * smb2_close_pipe() - handler for closing IPC pipe + * @work: smb work containing close request buffer + * + * Return: 0 + */ +static noinline int smb2_close_pipe(struct ksmbd_work *work) +{ + u64 id; + struct smb2_close_req *req = smb2_get_msg(work->request_buf); + struct smb2_close_rsp *rsp = smb2_get_msg(work->response_buf); + + id = req->VolatileFileId; + ksmbd_session_rpc_close(work->sess, id); + + rsp->StructureSize = cpu_to_le16(60); + rsp->Flags = 0; + rsp->Reserved = 0; + rsp->CreationTime = 0; + rsp->LastAccessTime = 0; + rsp->LastWriteTime = 0; + rsp->ChangeTime = 0; + rsp->AllocationSize = 0; + rsp->EndOfFile = 0; + rsp->Attributes = 0; + inc_rfc1001_len(work->response_buf, 60); + return 0; +} + +/** + * smb2_close() - handler for smb2 close file command + * @work: smb work containing close request buffer + * + * Return: 0 + */ +int smb2_close(struct ksmbd_work *work) +{ + u64 volatile_id = KSMBD_NO_FID; + u64 sess_id; + struct smb2_close_req *req; + struct smb2_close_rsp *rsp; + struct ksmbd_conn *conn = work->conn; + struct ksmbd_file *fp; + struct inode *inode; + u64 time; + int err = 0; + + WORK_BUFFERS(work, req, rsp); + + if (test_share_config_flag(work->tcon->share_conf, + KSMBD_SHARE_FLAG_PIPE)) { + ksmbd_debug(SMB, "IPC pipe close request\n"); + return smb2_close_pipe(work); + } + + sess_id = le64_to_cpu(req->hdr.SessionId); + if (req->hdr.Flags & SMB2_FLAGS_RELATED_OPERATIONS) + sess_id = work->compound_sid; + + work->compound_sid = 0; + if (check_session_id(conn, sess_id)) { + work->compound_sid = sess_id; + } else { + rsp->hdr.Status = STATUS_USER_SESSION_DELETED; + if (req->hdr.Flags & SMB2_FLAGS_RELATED_OPERATIONS) + rsp->hdr.Status = STATUS_INVALID_PARAMETER; + err = -EBADF; + goto out; + } + + if (work->next_smb2_rcv_hdr_off && + !has_file_id(req->VolatileFileId)) { + if (!has_file_id(work->compound_fid)) { + /* file already closed, return FILE_CLOSED */ + ksmbd_debug(SMB, "file already closed\n"); + rsp->hdr.Status = STATUS_FILE_CLOSED; + err = -EBADF; + goto out; + } else { + ksmbd_debug(SMB, + "Compound request set FID = %llu:%llu\n", + work->compound_fid, + work->compound_pfid); + volatile_id = work->compound_fid; + + /* file closed, stored id is not valid anymore */ + work->compound_fid = KSMBD_NO_FID; + work->compound_pfid = KSMBD_NO_FID; + } + } else { + volatile_id = req->VolatileFileId; + } + ksmbd_debug(SMB, "volatile_id = %llu\n", volatile_id); + + rsp->StructureSize = cpu_to_le16(60); + rsp->Reserved = 0; + + if (req->Flags == SMB2_CLOSE_FLAG_POSTQUERY_ATTRIB) { + fp = ksmbd_lookup_fd_fast(work, volatile_id); + if (!fp) { + err = -ENOENT; + goto out; + } + + inode = file_inode(fp->filp); + rsp->Flags = SMB2_CLOSE_FLAG_POSTQUERY_ATTRIB; + rsp->AllocationSize = S_ISDIR(inode->i_mode) ? 0 : + cpu_to_le64(inode->i_blocks << 9); + rsp->EndOfFile = cpu_to_le64(inode->i_size); + rsp->Attributes = fp->f_ci->m_fattr; + rsp->CreationTime = cpu_to_le64(fp->create_time); + time = ksmbd_UnixTimeToNT(inode->i_atime); + rsp->LastAccessTime = cpu_to_le64(time); + time = ksmbd_UnixTimeToNT(inode->i_mtime); + rsp->LastWriteTime = cpu_to_le64(time); + time = ksmbd_UnixTimeToNT(inode->i_ctime); + rsp->ChangeTime = cpu_to_le64(time); + ksmbd_fd_put(work, fp); + } else { + rsp->Flags = 0; + rsp->AllocationSize = 0; + rsp->EndOfFile = 0; + rsp->Attributes = 0; + rsp->CreationTime = 0; + rsp->LastAccessTime = 0; + rsp->LastWriteTime = 0; + rsp->ChangeTime = 0; + } + + err = ksmbd_close_fd(work, volatile_id); +out: + if (err) { + if (rsp->hdr.Status == 0) + rsp->hdr.Status = STATUS_FILE_CLOSED; + smb2_set_err_rsp(work); + } else { + inc_rfc1001_len(work->response_buf, 60); + } + + return 0; +} + +/** + * smb2_echo() - handler for smb2 echo(ping) command + * @work: smb work containing echo request buffer + * + * Return: 0 + */ +int smb2_echo(struct ksmbd_work *work) +{ + struct smb2_echo_rsp *rsp = smb2_get_msg(work->response_buf); + + rsp->StructureSize = cpu_to_le16(4); + rsp->Reserved = 0; + inc_rfc1001_len(work->response_buf, 4); + return 0; +} + +static int smb2_rename(struct ksmbd_work *work, + struct ksmbd_file *fp, + struct smb2_file_rename_info *file_info, + struct nls_table *local_nls) +{ + struct ksmbd_share_config *share = fp->tcon->share_conf; + char *new_name = NULL; + int rc, flags = 0; + + ksmbd_debug(SMB, "setting FILE_RENAME_INFO\n"); + new_name = smb2_get_name(file_info->FileName, + le32_to_cpu(file_info->FileNameLength), + local_nls); + if (IS_ERR(new_name)) + return PTR_ERR(new_name); + + if (strchr(new_name, ':')) { + int s_type; + char *xattr_stream_name, *stream_name = NULL; + size_t xattr_stream_size; + int len; + + rc = parse_stream_name(new_name, &stream_name, &s_type); + if (rc < 0) + goto out; + + len = strlen(new_name); + if (len > 0 && new_name[len - 1] != '/') { + pr_err("not allow base filename in rename\n"); + rc = -ESHARE; + goto out; + } + + rc = ksmbd_vfs_xattr_stream_name(stream_name, + &xattr_stream_name, + &xattr_stream_size, + s_type); + if (rc) + goto out; + + rc = ksmbd_vfs_setxattr(file_mnt_idmap(fp->filp), + fp->filp->f_path.dentry, + xattr_stream_name, + NULL, 0, 0); + if (rc < 0) { + pr_err("failed to store stream name in xattr: %d\n", + rc); + rc = -EINVAL; + goto out; + } + + goto out; + } + + ksmbd_debug(SMB, "new name %s\n", new_name); + if (ksmbd_share_veto_filename(share, new_name)) { + rc = -ENOENT; + ksmbd_debug(SMB, "Can't rename vetoed file: %s\n", new_name); + goto out; + } + + if (!file_info->ReplaceIfExists) + flags = RENAME_NOREPLACE; + + rc = ksmbd_vfs_rename(work, &fp->filp->f_path, new_name, flags); +out: + kfree(new_name); + return rc; +} + +static int smb2_create_link(struct ksmbd_work *work, + struct ksmbd_share_config *share, + struct smb2_file_link_info *file_info, + unsigned int buf_len, struct file *filp, + struct nls_table *local_nls) +{ + char *link_name = NULL, *target_name = NULL, *pathname = NULL; + struct path path; + bool file_present = true; + int rc; + + if (buf_len < (u64)sizeof(struct smb2_file_link_info) + + le32_to_cpu(file_info->FileNameLength)) + return -EINVAL; + + ksmbd_debug(SMB, "setting FILE_LINK_INFORMATION\n"); + pathname = kmalloc(PATH_MAX, GFP_KERNEL); + if (!pathname) + return -ENOMEM; + + link_name = smb2_get_name(file_info->FileName, + le32_to_cpu(file_info->FileNameLength), + local_nls); + if (IS_ERR(link_name) || S_ISDIR(file_inode(filp)->i_mode)) { + rc = -EINVAL; + goto out; + } + + ksmbd_debug(SMB, "link name is %s\n", link_name); + target_name = file_path(filp, pathname, PATH_MAX); + if (IS_ERR(target_name)) { + rc = -EINVAL; + goto out; + } + + ksmbd_debug(SMB, "target name is %s\n", target_name); + rc = ksmbd_vfs_kern_path_locked(work, link_name, LOOKUP_NO_SYMLINKS, + &path, 0); + if (rc) { + if (rc != -ENOENT) + goto out; + file_present = false; + } + + if (file_info->ReplaceIfExists) { + if (file_present) { + rc = ksmbd_vfs_remove_file(work, &path); + if (rc) { + rc = -EINVAL; + ksmbd_debug(SMB, "cannot delete %s\n", + link_name); + goto out; + } + } + } else { + if (file_present) { + rc = -EEXIST; + ksmbd_debug(SMB, "link already exists\n"); + goto out; + } + } + + rc = ksmbd_vfs_link(work, target_name, link_name); + if (rc) + rc = -EINVAL; +out: + if (file_present) { + inode_unlock(d_inode(path.dentry->d_parent)); + path_put(&path); + } + if (!IS_ERR(link_name)) + kfree(link_name); + kfree(pathname); + return rc; +} + +static int set_file_basic_info(struct ksmbd_file *fp, + struct smb2_file_basic_info *file_info, + struct ksmbd_share_config *share) +{ + struct iattr attrs; + struct file *filp; + struct inode *inode; + struct mnt_idmap *idmap; + int rc = 0; + + if (!(fp->daccess & FILE_WRITE_ATTRIBUTES_LE)) + return -EACCES; + + attrs.ia_valid = 0; + filp = fp->filp; + inode = file_inode(filp); + idmap = file_mnt_idmap(filp); + + if (file_info->CreationTime) + fp->create_time = le64_to_cpu(file_info->CreationTime); + + if (file_info->LastAccessTime) { + attrs.ia_atime = ksmbd_NTtimeToUnix(file_info->LastAccessTime); + attrs.ia_valid |= (ATTR_ATIME | ATTR_ATIME_SET); + } + + attrs.ia_valid |= ATTR_CTIME; + if (file_info->ChangeTime) + attrs.ia_ctime = ksmbd_NTtimeToUnix(file_info->ChangeTime); + else + attrs.ia_ctime = inode->i_ctime; + + if (file_info->LastWriteTime) { + attrs.ia_mtime = ksmbd_NTtimeToUnix(file_info->LastWriteTime); + attrs.ia_valid |= (ATTR_MTIME | ATTR_MTIME_SET); + } + + if (file_info->Attributes) { + if (!S_ISDIR(inode->i_mode) && + file_info->Attributes & FILE_ATTRIBUTE_DIRECTORY_LE) { + pr_err("can't change a file to a directory\n"); + return -EINVAL; + } + + if (!(S_ISDIR(inode->i_mode) && file_info->Attributes == FILE_ATTRIBUTE_NORMAL_LE)) + fp->f_ci->m_fattr = file_info->Attributes | + (fp->f_ci->m_fattr & FILE_ATTRIBUTE_DIRECTORY_LE); + } + + if (test_share_config_flag(share, KSMBD_SHARE_FLAG_STORE_DOS_ATTRS) && + (file_info->CreationTime || file_info->Attributes)) { + struct xattr_dos_attrib da = {0}; + + da.version = 4; + da.itime = fp->itime; + da.create_time = fp->create_time; + da.attr = le32_to_cpu(fp->f_ci->m_fattr); + da.flags = XATTR_DOSINFO_ATTRIB | XATTR_DOSINFO_CREATE_TIME | + XATTR_DOSINFO_ITIME; + + rc = ksmbd_vfs_set_dos_attrib_xattr(idmap, + filp->f_path.dentry, &da); + if (rc) + ksmbd_debug(SMB, + "failed to restore file attribute in EA\n"); + rc = 0; + } + + if (attrs.ia_valid) { + struct dentry *dentry = filp->f_path.dentry; + struct inode *inode = d_inode(dentry); + + if (IS_IMMUTABLE(inode) || IS_APPEND(inode)) + return -EACCES; + + inode_lock(inode); + inode->i_ctime = attrs.ia_ctime; + attrs.ia_valid &= ~ATTR_CTIME; + rc = notify_change(idmap, dentry, &attrs, NULL); + inode_unlock(inode); + } + return rc; +} + +static int set_file_allocation_info(struct ksmbd_work *work, + struct ksmbd_file *fp, + struct smb2_file_alloc_info *file_alloc_info) +{ + /* + * TODO : It's working fine only when store dos attributes + * is not yes. need to implement a logic which works + * properly with any smb.conf option + */ + + loff_t alloc_blks; + struct inode *inode; + int rc; + + if (!(fp->daccess & FILE_WRITE_DATA_LE)) + return -EACCES; + + alloc_blks = (le64_to_cpu(file_alloc_info->AllocationSize) + 511) >> 9; + inode = file_inode(fp->filp); + + if (alloc_blks > inode->i_blocks) { + smb_break_all_levII_oplock(work, fp, 1); + rc = vfs_fallocate(fp->filp, FALLOC_FL_KEEP_SIZE, 0, + alloc_blks * 512); + if (rc && rc != -EOPNOTSUPP) { + pr_err("vfs_fallocate is failed : %d\n", rc); + return rc; + } + } else if (alloc_blks < inode->i_blocks) { + loff_t size; + + /* + * Allocation size could be smaller than original one + * which means allocated blocks in file should be + * deallocated. use truncate to cut out it, but inode + * size is also updated with truncate offset. + * inode size is retained by backup inode size. + */ + size = i_size_read(inode); + rc = ksmbd_vfs_truncate(work, fp, alloc_blks * 512); + if (rc) { + pr_err("truncate failed!, err %d\n", rc); + return rc; + } + if (size < alloc_blks * 512) + i_size_write(inode, size); + } + return 0; +} + +static int set_end_of_file_info(struct ksmbd_work *work, struct ksmbd_file *fp, + struct smb2_file_eof_info *file_eof_info) +{ + loff_t newsize; + struct inode *inode; + int rc; + + if (!(fp->daccess & FILE_WRITE_DATA_LE)) + return -EACCES; + + newsize = le64_to_cpu(file_eof_info->EndOfFile); + inode = file_inode(fp->filp); + + /* + * If FILE_END_OF_FILE_INFORMATION of set_info_file is called + * on FAT32 shared device, truncate execution time is too long + * and network error could cause from windows client. because + * truncate of some filesystem like FAT32 fill zero data in + * truncated range. + */ + if (inode->i_sb->s_magic != MSDOS_SUPER_MAGIC) { + ksmbd_debug(SMB, "truncated to newsize %lld\n", newsize); + rc = ksmbd_vfs_truncate(work, fp, newsize); + if (rc) { + ksmbd_debug(SMB, "truncate failed!, err %d\n", rc); + if (rc != -EAGAIN) + rc = -EBADF; + return rc; + } + } + return 0; +} + +static int set_rename_info(struct ksmbd_work *work, struct ksmbd_file *fp, + struct smb2_file_rename_info *rename_info, + unsigned int buf_len) +{ + if (!(fp->daccess & FILE_DELETE_LE)) { + pr_err("no right to delete : 0x%x\n", fp->daccess); + return -EACCES; + } + + if (buf_len < (u64)sizeof(struct smb2_file_rename_info) + + le32_to_cpu(rename_info->FileNameLength)) + return -EINVAL; + + if (!le32_to_cpu(rename_info->FileNameLength)) + return -EINVAL; + + return smb2_rename(work, fp, rename_info, work->conn->local_nls); +} + +static int set_file_disposition_info(struct ksmbd_file *fp, + struct smb2_file_disposition_info *file_info) +{ + struct inode *inode; + + if (!(fp->daccess & FILE_DELETE_LE)) { + pr_err("no right to delete : 0x%x\n", fp->daccess); + return -EACCES; + } + + inode = file_inode(fp->filp); + if (file_info->DeletePending) { + if (S_ISDIR(inode->i_mode) && + ksmbd_vfs_empty_dir(fp) == -ENOTEMPTY) + return -EBUSY; + ksmbd_set_inode_pending_delete(fp); + } else { + ksmbd_clear_inode_pending_delete(fp); + } + return 0; +} + +static int set_file_position_info(struct ksmbd_file *fp, + struct smb2_file_pos_info *file_info) +{ + loff_t current_byte_offset; + unsigned long sector_size; + struct inode *inode; + + inode = file_inode(fp->filp); + current_byte_offset = le64_to_cpu(file_info->CurrentByteOffset); + sector_size = inode->i_sb->s_blocksize; + + if (current_byte_offset < 0 || + (fp->coption == FILE_NO_INTERMEDIATE_BUFFERING_LE && + current_byte_offset & (sector_size - 1))) { + pr_err("CurrentByteOffset is not valid : %llu\n", + current_byte_offset); + return -EINVAL; + } + + fp->filp->f_pos = current_byte_offset; + return 0; +} + +static int set_file_mode_info(struct ksmbd_file *fp, + struct smb2_file_mode_info *file_info) +{ + __le32 mode; + + mode = file_info->Mode; + + if ((mode & ~FILE_MODE_INFO_MASK)) { + pr_err("Mode is not valid : 0x%x\n", le32_to_cpu(mode)); + return -EINVAL; + } + + /* + * TODO : need to implement consideration for + * FILE_SYNCHRONOUS_IO_ALERT and FILE_SYNCHRONOUS_IO_NONALERT + */ + ksmbd_vfs_set_fadvise(fp->filp, mode); + fp->coption = mode; + return 0; +} + +/** + * smb2_set_info_file() - handler for smb2 set info command + * @work: smb work containing set info command buffer + * @fp: ksmbd_file pointer + * @req: request buffer pointer + * @share: ksmbd_share_config pointer + * + * Return: 0 on success, otherwise error + * TODO: need to implement an error handling for STATUS_INFO_LENGTH_MISMATCH + */ +static int smb2_set_info_file(struct ksmbd_work *work, struct ksmbd_file *fp, + struct smb2_set_info_req *req, + struct ksmbd_share_config *share) +{ + unsigned int buf_len = le32_to_cpu(req->BufferLength); + + switch (req->FileInfoClass) { + case FILE_BASIC_INFORMATION: + { + if (buf_len < sizeof(struct smb2_file_basic_info)) + return -EINVAL; + + return set_file_basic_info(fp, (struct smb2_file_basic_info *)req->Buffer, share); + } + case FILE_ALLOCATION_INFORMATION: + { + if (buf_len < sizeof(struct smb2_file_alloc_info)) + return -EINVAL; + + return set_file_allocation_info(work, fp, + (struct smb2_file_alloc_info *)req->Buffer); + } + case FILE_END_OF_FILE_INFORMATION: + { + if (buf_len < sizeof(struct smb2_file_eof_info)) + return -EINVAL; + + return set_end_of_file_info(work, fp, + (struct smb2_file_eof_info *)req->Buffer); + } + case FILE_RENAME_INFORMATION: + { + if (!test_tree_conn_flag(work->tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) { + ksmbd_debug(SMB, + "User does not have write permission\n"); + return -EACCES; + } + + if (buf_len < sizeof(struct smb2_file_rename_info)) + return -EINVAL; + + return set_rename_info(work, fp, + (struct smb2_file_rename_info *)req->Buffer, + buf_len); + } + case FILE_LINK_INFORMATION: + { + if (buf_len < sizeof(struct smb2_file_link_info)) + return -EINVAL; + + return smb2_create_link(work, work->tcon->share_conf, + (struct smb2_file_link_info *)req->Buffer, + buf_len, fp->filp, + work->conn->local_nls); + } + case FILE_DISPOSITION_INFORMATION: + { + if (!test_tree_conn_flag(work->tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) { + ksmbd_debug(SMB, + "User does not have write permission\n"); + return -EACCES; + } + + if (buf_len < sizeof(struct smb2_file_disposition_info)) + return -EINVAL; + + return set_file_disposition_info(fp, + (struct smb2_file_disposition_info *)req->Buffer); + } + case FILE_FULL_EA_INFORMATION: + { + if (!(fp->daccess & FILE_WRITE_EA_LE)) { + pr_err("Not permitted to write ext attr: 0x%x\n", + fp->daccess); + return -EACCES; + } + + if (buf_len < sizeof(struct smb2_ea_info)) + return -EINVAL; + + return smb2_set_ea((struct smb2_ea_info *)req->Buffer, + buf_len, &fp->filp->f_path); + } + case FILE_POSITION_INFORMATION: + { + if (buf_len < sizeof(struct smb2_file_pos_info)) + return -EINVAL; + + return set_file_position_info(fp, (struct smb2_file_pos_info *)req->Buffer); + } + case FILE_MODE_INFORMATION: + { + if (buf_len < sizeof(struct smb2_file_mode_info)) + return -EINVAL; + + return set_file_mode_info(fp, (struct smb2_file_mode_info *)req->Buffer); + } + } + + pr_err("Unimplemented Fileinfoclass :%d\n", req->FileInfoClass); + return -EOPNOTSUPP; +} + +static int smb2_set_info_sec(struct ksmbd_file *fp, int addition_info, + char *buffer, int buf_len) +{ + struct smb_ntsd *pntsd = (struct smb_ntsd *)buffer; + + fp->saccess |= FILE_SHARE_DELETE_LE; + + return set_info_sec(fp->conn, fp->tcon, &fp->filp->f_path, pntsd, + buf_len, false); +} + +/** + * smb2_set_info() - handler for smb2 set info command handler + * @work: smb work containing set info request buffer + * + * Return: 0 on success, otherwise error + */ +int smb2_set_info(struct ksmbd_work *work) +{ + struct smb2_set_info_req *req; + struct smb2_set_info_rsp *rsp; + struct ksmbd_file *fp; + int rc = 0; + unsigned int id = KSMBD_NO_FID, pid = KSMBD_NO_FID; + + ksmbd_debug(SMB, "Received set info request\n"); + + if (work->next_smb2_rcv_hdr_off) { + req = ksmbd_req_buf_next(work); + rsp = ksmbd_resp_buf_next(work); + if (!has_file_id(req->VolatileFileId)) { + ksmbd_debug(SMB, "Compound request set FID = %llu\n", + work->compound_fid); + id = work->compound_fid; + pid = work->compound_pfid; + } + } else { + req = smb2_get_msg(work->request_buf); + rsp = smb2_get_msg(work->response_buf); + } + + if (!has_file_id(id)) { + id = req->VolatileFileId; + pid = req->PersistentFileId; + } + + fp = ksmbd_lookup_fd_slow(work, id, pid); + if (!fp) { + ksmbd_debug(SMB, "Invalid id for close: %u\n", id); + rc = -ENOENT; + goto err_out; + } + + switch (req->InfoType) { + case SMB2_O_INFO_FILE: + ksmbd_debug(SMB, "GOT SMB2_O_INFO_FILE\n"); + rc = smb2_set_info_file(work, fp, req, work->tcon->share_conf); + break; + case SMB2_O_INFO_SECURITY: + ksmbd_debug(SMB, "GOT SMB2_O_INFO_SECURITY\n"); + if (ksmbd_override_fsids(work)) { + rc = -ENOMEM; + goto err_out; + } + rc = smb2_set_info_sec(fp, + le32_to_cpu(req->AdditionalInformation), + req->Buffer, + le32_to_cpu(req->BufferLength)); + ksmbd_revert_fsids(work); + break; + default: + rc = -EOPNOTSUPP; + } + + if (rc < 0) + goto err_out; + + rsp->StructureSize = cpu_to_le16(2); + inc_rfc1001_len(work->response_buf, 2); + ksmbd_fd_put(work, fp); + return 0; + +err_out: + if (rc == -EACCES || rc == -EPERM || rc == -EXDEV) + rsp->hdr.Status = STATUS_ACCESS_DENIED; + else if (rc == -EINVAL) + rsp->hdr.Status = STATUS_INVALID_PARAMETER; + else if (rc == -ESHARE) + rsp->hdr.Status = STATUS_SHARING_VIOLATION; + else if (rc == -ENOENT) + rsp->hdr.Status = STATUS_OBJECT_NAME_INVALID; + else if (rc == -EBUSY || rc == -ENOTEMPTY) + rsp->hdr.Status = STATUS_DIRECTORY_NOT_EMPTY; + else if (rc == -EAGAIN) + rsp->hdr.Status = STATUS_FILE_LOCK_CONFLICT; + else if (rc == -EBADF || rc == -ESTALE) + rsp->hdr.Status = STATUS_INVALID_HANDLE; + else if (rc == -EEXIST) + rsp->hdr.Status = STATUS_OBJECT_NAME_COLLISION; + else if (rsp->hdr.Status == 0 || rc == -EOPNOTSUPP) + rsp->hdr.Status = STATUS_INVALID_INFO_CLASS; + smb2_set_err_rsp(work); + ksmbd_fd_put(work, fp); + ksmbd_debug(SMB, "error while processing smb2 query rc = %d\n", rc); + return rc; +} + +/** + * smb2_read_pipe() - handler for smb2 read from IPC pipe + * @work: smb work containing read IPC pipe command buffer + * + * Return: 0 on success, otherwise error + */ +static noinline int smb2_read_pipe(struct ksmbd_work *work) +{ + int nbytes = 0, err; + u64 id; + struct ksmbd_rpc_command *rpc_resp; + struct smb2_read_req *req = smb2_get_msg(work->request_buf); + struct smb2_read_rsp *rsp = smb2_get_msg(work->response_buf); + + id = req->VolatileFileId; + + inc_rfc1001_len(work->response_buf, 16); + rpc_resp = ksmbd_rpc_read(work->sess, id); + if (rpc_resp) { + if (rpc_resp->flags != KSMBD_RPC_OK) { + err = -EINVAL; + goto out; + } + + work->aux_payload_buf = + kvmalloc(rpc_resp->payload_sz, GFP_KERNEL | __GFP_ZERO); + if (!work->aux_payload_buf) { + err = -ENOMEM; + goto out; + } + + memcpy(work->aux_payload_buf, rpc_resp->payload, + rpc_resp->payload_sz); + + nbytes = rpc_resp->payload_sz; + work->resp_hdr_sz = get_rfc1002_len(work->response_buf) + 4; + work->aux_payload_sz = nbytes; + kvfree(rpc_resp); + } + + rsp->StructureSize = cpu_to_le16(17); + rsp->DataOffset = 80; + rsp->Reserved = 0; + rsp->DataLength = cpu_to_le32(nbytes); + rsp->DataRemaining = 0; + rsp->Flags = 0; + inc_rfc1001_len(work->response_buf, nbytes); + return 0; + +out: + rsp->hdr.Status = STATUS_UNEXPECTED_IO_ERROR; + smb2_set_err_rsp(work); + kvfree(rpc_resp); + return err; +} + +static int smb2_set_remote_key_for_rdma(struct ksmbd_work *work, + struct smb2_buffer_desc_v1 *desc, + __le32 Channel, + __le16 ChannelInfoLength) +{ + unsigned int i, ch_count; + + if (work->conn->dialect == SMB30_PROT_ID && + Channel != SMB2_CHANNEL_RDMA_V1) + return -EINVAL; + + ch_count = le16_to_cpu(ChannelInfoLength) / sizeof(*desc); + if (ksmbd_debug_types & KSMBD_DEBUG_RDMA) { + for (i = 0; i < ch_count; i++) { + pr_info("RDMA r/w request %#x: token %#x, length %#x\n", + i, + le32_to_cpu(desc[i].token), + le32_to_cpu(desc[i].length)); + } + } + if (!ch_count) + return -EINVAL; + + work->need_invalidate_rkey = + (Channel == SMB2_CHANNEL_RDMA_V1_INVALIDATE); + if (Channel == SMB2_CHANNEL_RDMA_V1_INVALIDATE) + work->remote_key = le32_to_cpu(desc->token); + return 0; +} + +static ssize_t smb2_read_rdma_channel(struct ksmbd_work *work, + struct smb2_read_req *req, void *data_buf, + size_t length) +{ + int err; + + err = ksmbd_conn_rdma_write(work->conn, data_buf, length, + (struct smb2_buffer_desc_v1 *) + ((char *)req + le16_to_cpu(req->ReadChannelInfoOffset)), + le16_to_cpu(req->ReadChannelInfoLength)); + if (err) + return err; + + return length; +} + +/** + * smb2_read() - handler for smb2 read from file + * @work: smb work containing read command buffer + * + * Return: 0 on success, otherwise error + */ +int smb2_read(struct ksmbd_work *work) +{ + struct ksmbd_conn *conn = work->conn; + struct smb2_read_req *req; + struct smb2_read_rsp *rsp; + struct ksmbd_file *fp = NULL; + loff_t offset; + size_t length, mincount; + ssize_t nbytes = 0, remain_bytes = 0; + int err = 0; + bool is_rdma_channel = false; + unsigned int max_read_size = conn->vals->max_read_size; + + WORK_BUFFERS(work, req, rsp); + + if (test_share_config_flag(work->tcon->share_conf, + KSMBD_SHARE_FLAG_PIPE)) { + ksmbd_debug(SMB, "IPC pipe read request\n"); + return smb2_read_pipe(work); + } + + if (req->Channel == SMB2_CHANNEL_RDMA_V1_INVALIDATE || + req->Channel == SMB2_CHANNEL_RDMA_V1) { + is_rdma_channel = true; + max_read_size = get_smbd_max_read_write_size(); + } + + if (is_rdma_channel == true) { + unsigned int ch_offset = le16_to_cpu(req->ReadChannelInfoOffset); + + if (ch_offset < offsetof(struct smb2_read_req, Buffer)) { + err = -EINVAL; + goto out; + } + err = smb2_set_remote_key_for_rdma(work, + (struct smb2_buffer_desc_v1 *) + ((char *)req + ch_offset), + req->Channel, + req->ReadChannelInfoLength); + if (err) + goto out; + } + + fp = ksmbd_lookup_fd_slow(work, req->VolatileFileId, req->PersistentFileId); + if (!fp) { + err = -ENOENT; + goto out; + } + + if (!(fp->daccess & (FILE_READ_DATA_LE | FILE_READ_ATTRIBUTES_LE))) { + pr_err("Not permitted to read : 0x%x\n", fp->daccess); + err = -EACCES; + goto out; + } + + offset = le64_to_cpu(req->Offset); + length = le32_to_cpu(req->Length); + mincount = le32_to_cpu(req->MinimumCount); + + if (length > max_read_size) { + ksmbd_debug(SMB, "limiting read size to max size(%u)\n", + max_read_size); + err = -EINVAL; + goto out; + } + + ksmbd_debug(SMB, "filename %pD, offset %lld, len %zu\n", + fp->filp, offset, length); + + work->aux_payload_buf = kvmalloc(length, GFP_KERNEL | __GFP_ZERO); + if (!work->aux_payload_buf) { + err = -ENOMEM; + goto out; + } + + nbytes = ksmbd_vfs_read(work, fp, length, &offset); + if (nbytes < 0) { + err = nbytes; + goto out; + } + + if ((nbytes == 0 && length != 0) || nbytes < mincount) { + kvfree(work->aux_payload_buf); + work->aux_payload_buf = NULL; + rsp->hdr.Status = STATUS_END_OF_FILE; + smb2_set_err_rsp(work); + ksmbd_fd_put(work, fp); + return 0; + } + + ksmbd_debug(SMB, "nbytes %zu, offset %lld mincount %zu\n", + nbytes, offset, mincount); + + if (is_rdma_channel == true) { + /* write data to the client using rdma channel */ + remain_bytes = smb2_read_rdma_channel(work, req, + work->aux_payload_buf, + nbytes); + kvfree(work->aux_payload_buf); + work->aux_payload_buf = NULL; + + nbytes = 0; + if (remain_bytes < 0) { + err = (int)remain_bytes; + goto out; + } + } + + rsp->StructureSize = cpu_to_le16(17); + rsp->DataOffset = 80; + rsp->Reserved = 0; + rsp->DataLength = cpu_to_le32(nbytes); + rsp->DataRemaining = cpu_to_le32(remain_bytes); + rsp->Flags = 0; + inc_rfc1001_len(work->response_buf, 16); + work->resp_hdr_sz = get_rfc1002_len(work->response_buf) + 4; + work->aux_payload_sz = nbytes; + inc_rfc1001_len(work->response_buf, nbytes); + ksmbd_fd_put(work, fp); + return 0; + +out: + if (err) { + if (err == -EISDIR) + rsp->hdr.Status = STATUS_INVALID_DEVICE_REQUEST; + else if (err == -EAGAIN) + rsp->hdr.Status = STATUS_FILE_LOCK_CONFLICT; + else if (err == -ENOENT) + rsp->hdr.Status = STATUS_FILE_CLOSED; + else if (err == -EACCES) + rsp->hdr.Status = STATUS_ACCESS_DENIED; + else if (err == -ESHARE) + rsp->hdr.Status = STATUS_SHARING_VIOLATION; + else if (err == -EINVAL) + rsp->hdr.Status = STATUS_INVALID_PARAMETER; + else + rsp->hdr.Status = STATUS_INVALID_HANDLE; + + smb2_set_err_rsp(work); + } + ksmbd_fd_put(work, fp); + return err; +} + +/** + * smb2_write_pipe() - handler for smb2 write on IPC pipe + * @work: smb work containing write IPC pipe command buffer + * + * Return: 0 on success, otherwise error + */ +static noinline int smb2_write_pipe(struct ksmbd_work *work) +{ + struct smb2_write_req *req = smb2_get_msg(work->request_buf); + struct smb2_write_rsp *rsp = smb2_get_msg(work->response_buf); + struct ksmbd_rpc_command *rpc_resp; + u64 id = 0; + int err = 0, ret = 0; + char *data_buf; + size_t length; + + length = le32_to_cpu(req->Length); + id = req->VolatileFileId; + + if ((u64)le16_to_cpu(req->DataOffset) + length > + get_rfc1002_len(work->request_buf)) { + pr_err("invalid write data offset %u, smb_len %u\n", + le16_to_cpu(req->DataOffset), + get_rfc1002_len(work->request_buf)); + err = -EINVAL; + goto out; + } + + data_buf = (char *)(((char *)&req->hdr.ProtocolId) + + le16_to_cpu(req->DataOffset)); + + rpc_resp = ksmbd_rpc_write(work->sess, id, data_buf, length); + if (rpc_resp) { + if (rpc_resp->flags == KSMBD_RPC_ENOTIMPLEMENTED) { + rsp->hdr.Status = STATUS_NOT_SUPPORTED; + kvfree(rpc_resp); + smb2_set_err_rsp(work); + return -EOPNOTSUPP; + } + if (rpc_resp->flags != KSMBD_RPC_OK) { + rsp->hdr.Status = STATUS_INVALID_HANDLE; + smb2_set_err_rsp(work); + kvfree(rpc_resp); + return ret; + } + kvfree(rpc_resp); + } + + rsp->StructureSize = cpu_to_le16(17); + rsp->DataOffset = 0; + rsp->Reserved = 0; + rsp->DataLength = cpu_to_le32(length); + rsp->DataRemaining = 0; + rsp->Reserved2 = 0; + inc_rfc1001_len(work->response_buf, 16); + return 0; +out: + if (err) { + rsp->hdr.Status = STATUS_INVALID_HANDLE; + smb2_set_err_rsp(work); + } + + return err; +} + +static ssize_t smb2_write_rdma_channel(struct ksmbd_work *work, + struct smb2_write_req *req, + struct ksmbd_file *fp, + loff_t offset, size_t length, bool sync) +{ + char *data_buf; + int ret; + ssize_t nbytes; + + data_buf = kvmalloc(length, GFP_KERNEL | __GFP_ZERO); + if (!data_buf) + return -ENOMEM; + + ret = ksmbd_conn_rdma_read(work->conn, data_buf, length, + (struct smb2_buffer_desc_v1 *) + ((char *)req + le16_to_cpu(req->WriteChannelInfoOffset)), + le16_to_cpu(req->WriteChannelInfoLength)); + if (ret < 0) { + kvfree(data_buf); + return ret; + } + + ret = ksmbd_vfs_write(work, fp, data_buf, length, &offset, sync, &nbytes); + kvfree(data_buf); + if (ret < 0) + return ret; + + return nbytes; +} + +/** + * smb2_write() - handler for smb2 write from file + * @work: smb work containing write command buffer + * + * Return: 0 on success, otherwise error + */ +int smb2_write(struct ksmbd_work *work) +{ + struct smb2_write_req *req; + struct smb2_write_rsp *rsp; + struct ksmbd_file *fp = NULL; + loff_t offset; + size_t length; + ssize_t nbytes; + char *data_buf; + bool writethrough = false, is_rdma_channel = false; + int err = 0; + unsigned int max_write_size = work->conn->vals->max_write_size; + + WORK_BUFFERS(work, req, rsp); + + if (test_share_config_flag(work->tcon->share_conf, KSMBD_SHARE_FLAG_PIPE)) { + ksmbd_debug(SMB, "IPC pipe write request\n"); + return smb2_write_pipe(work); + } + + offset = le64_to_cpu(req->Offset); + length = le32_to_cpu(req->Length); + + if (req->Channel == SMB2_CHANNEL_RDMA_V1 || + req->Channel == SMB2_CHANNEL_RDMA_V1_INVALIDATE) { + is_rdma_channel = true; + max_write_size = get_smbd_max_read_write_size(); + length = le32_to_cpu(req->RemainingBytes); + } + + if (is_rdma_channel == true) { + unsigned int ch_offset = le16_to_cpu(req->WriteChannelInfoOffset); + + if (req->Length != 0 || req->DataOffset != 0 || + ch_offset < offsetof(struct smb2_write_req, Buffer)) { + err = -EINVAL; + goto out; + } + err = smb2_set_remote_key_for_rdma(work, + (struct smb2_buffer_desc_v1 *) + ((char *)req + ch_offset), + req->Channel, + req->WriteChannelInfoLength); + if (err) + goto out; + } + + if (!test_tree_conn_flag(work->tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) { + ksmbd_debug(SMB, "User does not have write permission\n"); + err = -EACCES; + goto out; + } + + fp = ksmbd_lookup_fd_slow(work, req->VolatileFileId, req->PersistentFileId); + if (!fp) { + err = -ENOENT; + goto out; + } + + if (!(fp->daccess & (FILE_WRITE_DATA_LE | FILE_READ_ATTRIBUTES_LE))) { + pr_err("Not permitted to write : 0x%x\n", fp->daccess); + err = -EACCES; + goto out; + } + + if (length > max_write_size) { + ksmbd_debug(SMB, "limiting write size to max size(%u)\n", + max_write_size); + err = -EINVAL; + goto out; + } + + ksmbd_debug(SMB, "flags %u\n", le32_to_cpu(req->Flags)); + if (le32_to_cpu(req->Flags) & SMB2_WRITEFLAG_WRITE_THROUGH) + writethrough = true; + + if (is_rdma_channel == false) { + if (le16_to_cpu(req->DataOffset) < + offsetof(struct smb2_write_req, Buffer)) { + err = -EINVAL; + goto out; + } + + data_buf = (char *)(((char *)&req->hdr.ProtocolId) + + le16_to_cpu(req->DataOffset)); + + ksmbd_debug(SMB, "filename %pD, offset %lld, len %zu\n", + fp->filp, offset, length); + err = ksmbd_vfs_write(work, fp, data_buf, length, &offset, + writethrough, &nbytes); + if (err < 0) + goto out; + } else { + /* read data from the client using rdma channel, and + * write the data. + */ + nbytes = smb2_write_rdma_channel(work, req, fp, offset, length, + writethrough); + if (nbytes < 0) { + err = (int)nbytes; + goto out; + } + } + + rsp->StructureSize = cpu_to_le16(17); + rsp->DataOffset = 0; + rsp->Reserved = 0; + rsp->DataLength = cpu_to_le32(nbytes); + rsp->DataRemaining = 0; + rsp->Reserved2 = 0; + inc_rfc1001_len(work->response_buf, 16); + ksmbd_fd_put(work, fp); + return 0; + +out: + if (err == -EAGAIN) + rsp->hdr.Status = STATUS_FILE_LOCK_CONFLICT; + else if (err == -ENOSPC || err == -EFBIG) + rsp->hdr.Status = STATUS_DISK_FULL; + else if (err == -ENOENT) + rsp->hdr.Status = STATUS_FILE_CLOSED; + else if (err == -EACCES) + rsp->hdr.Status = STATUS_ACCESS_DENIED; + else if (err == -ESHARE) + rsp->hdr.Status = STATUS_SHARING_VIOLATION; + else if (err == -EINVAL) + rsp->hdr.Status = STATUS_INVALID_PARAMETER; + else + rsp->hdr.Status = STATUS_INVALID_HANDLE; + + smb2_set_err_rsp(work); + ksmbd_fd_put(work, fp); + return err; +} + +/** + * smb2_flush() - handler for smb2 flush file - fsync + * @work: smb work containing flush command buffer + * + * Return: 0 on success, otherwise error + */ +int smb2_flush(struct ksmbd_work *work) +{ + struct smb2_flush_req *req; + struct smb2_flush_rsp *rsp; + int err; + + WORK_BUFFERS(work, req, rsp); + + ksmbd_debug(SMB, "SMB2_FLUSH called for fid %llu\n", req->VolatileFileId); + + err = ksmbd_vfs_fsync(work, req->VolatileFileId, req->PersistentFileId); + if (err) + goto out; + + rsp->StructureSize = cpu_to_le16(4); + rsp->Reserved = 0; + inc_rfc1001_len(work->response_buf, 4); + return 0; + +out: + if (err) { + rsp->hdr.Status = STATUS_INVALID_HANDLE; + smb2_set_err_rsp(work); + } + + return err; +} + +/** + * smb2_cancel() - handler for smb2 cancel command + * @work: smb work containing cancel command buffer + * + * Return: 0 on success, otherwise error + */ +int smb2_cancel(struct ksmbd_work *work) +{ + struct ksmbd_conn *conn = work->conn; + struct smb2_hdr *hdr = smb2_get_msg(work->request_buf); + struct smb2_hdr *chdr; + struct ksmbd_work *iter; + struct list_head *command_list; + + ksmbd_debug(SMB, "smb2 cancel called on mid %llu, async flags 0x%x\n", + hdr->MessageId, hdr->Flags); + + if (hdr->Flags & SMB2_FLAGS_ASYNC_COMMAND) { + command_list = &conn->async_requests; + + spin_lock(&conn->request_lock); + list_for_each_entry(iter, command_list, + async_request_entry) { + chdr = smb2_get_msg(iter->request_buf); + + if (iter->async_id != + le64_to_cpu(hdr->Id.AsyncId)) + continue; + + ksmbd_debug(SMB, + "smb2 with AsyncId %llu cancelled command = 0x%x\n", + le64_to_cpu(hdr->Id.AsyncId), + le16_to_cpu(chdr->Command)); + iter->state = KSMBD_WORK_CANCELLED; + if (iter->cancel_fn) + iter->cancel_fn(iter->cancel_argv); + break; + } + spin_unlock(&conn->request_lock); + } else { + command_list = &conn->requests; + + spin_lock(&conn->request_lock); + list_for_each_entry(iter, command_list, request_entry) { + chdr = smb2_get_msg(iter->request_buf); + + if (chdr->MessageId != hdr->MessageId || + iter == work) + continue; + + ksmbd_debug(SMB, + "smb2 with mid %llu cancelled command = 0x%x\n", + le64_to_cpu(hdr->MessageId), + le16_to_cpu(chdr->Command)); + iter->state = KSMBD_WORK_CANCELLED; + break; + } + spin_unlock(&conn->request_lock); + } + + /* For SMB2_CANCEL command itself send no response*/ + work->send_no_response = 1; + return 0; +} + +struct file_lock *smb_flock_init(struct file *f) +{ + struct file_lock *fl; + + fl = locks_alloc_lock(); + if (!fl) + goto out; + + locks_init_lock(fl); + + fl->fl_owner = f; + fl->fl_pid = current->tgid; + fl->fl_file = f; + fl->fl_flags = FL_POSIX; + fl->fl_ops = NULL; + fl->fl_lmops = NULL; + +out: + return fl; +} + +static int smb2_set_flock_flags(struct file_lock *flock, int flags) +{ + int cmd = -EINVAL; + + /* Checking for wrong flag combination during lock request*/ + switch (flags) { + case SMB2_LOCKFLAG_SHARED: + ksmbd_debug(SMB, "received shared request\n"); + cmd = F_SETLKW; + flock->fl_type = F_RDLCK; + flock->fl_flags |= FL_SLEEP; + break; + case SMB2_LOCKFLAG_EXCLUSIVE: + ksmbd_debug(SMB, "received exclusive request\n"); + cmd = F_SETLKW; + flock->fl_type = F_WRLCK; + flock->fl_flags |= FL_SLEEP; + break; + case SMB2_LOCKFLAG_SHARED | SMB2_LOCKFLAG_FAIL_IMMEDIATELY: + ksmbd_debug(SMB, + "received shared & fail immediately request\n"); + cmd = F_SETLK; + flock->fl_type = F_RDLCK; + break; + case SMB2_LOCKFLAG_EXCLUSIVE | SMB2_LOCKFLAG_FAIL_IMMEDIATELY: + ksmbd_debug(SMB, + "received exclusive & fail immediately request\n"); + cmd = F_SETLK; + flock->fl_type = F_WRLCK; + break; + case SMB2_LOCKFLAG_UNLOCK: + ksmbd_debug(SMB, "received unlock request\n"); + flock->fl_type = F_UNLCK; + cmd = F_SETLK; + break; + } + + return cmd; +} + +static struct ksmbd_lock *smb2_lock_init(struct file_lock *flock, + unsigned int cmd, int flags, + struct list_head *lock_list) +{ + struct ksmbd_lock *lock; + + lock = kzalloc(sizeof(struct ksmbd_lock), GFP_KERNEL); + if (!lock) + return NULL; + + lock->cmd = cmd; + lock->fl = flock; + lock->start = flock->fl_start; + lock->end = flock->fl_end; + lock->flags = flags; + if (lock->start == lock->end) + lock->zero_len = 1; + INIT_LIST_HEAD(&lock->clist); + INIT_LIST_HEAD(&lock->flist); + INIT_LIST_HEAD(&lock->llist); + list_add_tail(&lock->llist, lock_list); + + return lock; +} + +static void smb2_remove_blocked_lock(void **argv) +{ + struct file_lock *flock = (struct file_lock *)argv[0]; + + ksmbd_vfs_posix_lock_unblock(flock); + wake_up(&flock->fl_wait); +} + +static inline bool lock_defer_pending(struct file_lock *fl) +{ + /* check pending lock waiters */ + return waitqueue_active(&fl->fl_wait); +} + +/** + * smb2_lock() - handler for smb2 file lock command + * @work: smb work containing lock command buffer + * + * Return: 0 on success, otherwise error + */ +int smb2_lock(struct ksmbd_work *work) +{ + struct smb2_lock_req *req = smb2_get_msg(work->request_buf); + struct smb2_lock_rsp *rsp = smb2_get_msg(work->response_buf); + struct smb2_lock_element *lock_ele; + struct ksmbd_file *fp = NULL; + struct file_lock *flock = NULL; + struct file *filp = NULL; + int lock_count; + int flags = 0; + int cmd = 0; + int err = -EIO, i, rc = 0; + u64 lock_start, lock_length; + struct ksmbd_lock *smb_lock = NULL, *cmp_lock, *tmp, *tmp2; + struct ksmbd_conn *conn; + int nolock = 0; + LIST_HEAD(lock_list); + LIST_HEAD(rollback_list); + int prior_lock = 0; + + ksmbd_debug(SMB, "Received lock request\n"); + fp = ksmbd_lookup_fd_slow(work, req->VolatileFileId, req->PersistentFileId); + if (!fp) { + ksmbd_debug(SMB, "Invalid file id for lock : %llu\n", req->VolatileFileId); + err = -ENOENT; + goto out2; + } + + filp = fp->filp; + lock_count = le16_to_cpu(req->LockCount); + lock_ele = req->locks; + + ksmbd_debug(SMB, "lock count is %d\n", lock_count); + if (!lock_count) { + err = -EINVAL; + goto out2; + } + + for (i = 0; i < lock_count; i++) { + flags = le32_to_cpu(lock_ele[i].Flags); + + flock = smb_flock_init(filp); + if (!flock) + goto out; + + cmd = smb2_set_flock_flags(flock, flags); + + lock_start = le64_to_cpu(lock_ele[i].Offset); + lock_length = le64_to_cpu(lock_ele[i].Length); + if (lock_start > U64_MAX - lock_length) { + pr_err("Invalid lock range requested\n"); + rsp->hdr.Status = STATUS_INVALID_LOCK_RANGE; + locks_free_lock(flock); + goto out; + } + + if (lock_start > OFFSET_MAX) + flock->fl_start = OFFSET_MAX; + else + flock->fl_start = lock_start; + + lock_length = le64_to_cpu(lock_ele[i].Length); + if (lock_length > OFFSET_MAX - flock->fl_start) + lock_length = OFFSET_MAX - flock->fl_start; + + flock->fl_end = flock->fl_start + lock_length; + + if (flock->fl_end < flock->fl_start) { + ksmbd_debug(SMB, + "the end offset(%llx) is smaller than the start offset(%llx)\n", + flock->fl_end, flock->fl_start); + rsp->hdr.Status = STATUS_INVALID_LOCK_RANGE; + locks_free_lock(flock); + goto out; + } + + /* Check conflict locks in one request */ + list_for_each_entry(cmp_lock, &lock_list, llist) { + if (cmp_lock->fl->fl_start <= flock->fl_start && + cmp_lock->fl->fl_end >= flock->fl_end) { + if (cmp_lock->fl->fl_type != F_UNLCK && + flock->fl_type != F_UNLCK) { + pr_err("conflict two locks in one request\n"); + err = -EINVAL; + locks_free_lock(flock); + goto out; + } + } + } + + smb_lock = smb2_lock_init(flock, cmd, flags, &lock_list); + if (!smb_lock) { + err = -EINVAL; + locks_free_lock(flock); + goto out; + } + } + + list_for_each_entry_safe(smb_lock, tmp, &lock_list, llist) { + if (smb_lock->cmd < 0) { + err = -EINVAL; + goto out; + } + + if (!(smb_lock->flags & SMB2_LOCKFLAG_MASK)) { + err = -EINVAL; + goto out; + } + + if ((prior_lock & (SMB2_LOCKFLAG_EXCLUSIVE | SMB2_LOCKFLAG_SHARED) && + smb_lock->flags & SMB2_LOCKFLAG_UNLOCK) || + (prior_lock == SMB2_LOCKFLAG_UNLOCK && + !(smb_lock->flags & SMB2_LOCKFLAG_UNLOCK))) { + err = -EINVAL; + goto out; + } + + prior_lock = smb_lock->flags; + + if (!(smb_lock->flags & SMB2_LOCKFLAG_UNLOCK) && + !(smb_lock->flags & SMB2_LOCKFLAG_FAIL_IMMEDIATELY)) + goto no_check_cl; + + nolock = 1; + /* check locks in connection list */ + down_read(&conn_list_lock); + list_for_each_entry(conn, &conn_list, conns_list) { + spin_lock(&conn->llist_lock); + list_for_each_entry_safe(cmp_lock, tmp2, &conn->lock_list, clist) { + if (file_inode(cmp_lock->fl->fl_file) != + file_inode(smb_lock->fl->fl_file)) + continue; + + if (smb_lock->fl->fl_type == F_UNLCK) { + if (cmp_lock->fl->fl_file == smb_lock->fl->fl_file && + cmp_lock->start == smb_lock->start && + cmp_lock->end == smb_lock->end && + !lock_defer_pending(cmp_lock->fl)) { + nolock = 0; + list_del(&cmp_lock->flist); + list_del(&cmp_lock->clist); + spin_unlock(&conn->llist_lock); + up_read(&conn_list_lock); + + locks_free_lock(cmp_lock->fl); + kfree(cmp_lock); + goto out_check_cl; + } + continue; + } + + if (cmp_lock->fl->fl_file == smb_lock->fl->fl_file) { + if (smb_lock->flags & SMB2_LOCKFLAG_SHARED) + continue; + } else { + if (cmp_lock->flags & SMB2_LOCKFLAG_SHARED) + continue; + } + + /* check zero byte lock range */ + if (cmp_lock->zero_len && !smb_lock->zero_len && + cmp_lock->start > smb_lock->start && + cmp_lock->start < smb_lock->end) { + spin_unlock(&conn->llist_lock); + up_read(&conn_list_lock); + pr_err("previous lock conflict with zero byte lock range\n"); + goto out; + } + + if (smb_lock->zero_len && !cmp_lock->zero_len && + smb_lock->start > cmp_lock->start && + smb_lock->start < cmp_lock->end) { + spin_unlock(&conn->llist_lock); + up_read(&conn_list_lock); + pr_err("current lock conflict with zero byte lock range\n"); + goto out; + } + + if (((cmp_lock->start <= smb_lock->start && + cmp_lock->end > smb_lock->start) || + (cmp_lock->start < smb_lock->end && + cmp_lock->end >= smb_lock->end)) && + !cmp_lock->zero_len && !smb_lock->zero_len) { + spin_unlock(&conn->llist_lock); + up_read(&conn_list_lock); + pr_err("Not allow lock operation on exclusive lock range\n"); + goto out; + } + } + spin_unlock(&conn->llist_lock); + } + up_read(&conn_list_lock); +out_check_cl: + if (smb_lock->fl->fl_type == F_UNLCK && nolock) { + pr_err("Try to unlock nolocked range\n"); + rsp->hdr.Status = STATUS_RANGE_NOT_LOCKED; + goto out; + } + +no_check_cl: + if (smb_lock->zero_len) { + err = 0; + goto skip; + } + + flock = smb_lock->fl; + list_del(&smb_lock->llist); +retry: + rc = vfs_lock_file(filp, smb_lock->cmd, flock, NULL); +skip: + if (flags & SMB2_LOCKFLAG_UNLOCK) { + if (!rc) { + ksmbd_debug(SMB, "File unlocked\n"); + } else if (rc == -ENOENT) { + rsp->hdr.Status = STATUS_NOT_LOCKED; + goto out; + } + locks_free_lock(flock); + kfree(smb_lock); + } else { + if (rc == FILE_LOCK_DEFERRED) { + void **argv; + + ksmbd_debug(SMB, + "would have to wait for getting lock\n"); + spin_lock(&work->conn->llist_lock); + list_add_tail(&smb_lock->clist, + &work->conn->lock_list); + spin_unlock(&work->conn->llist_lock); + list_add(&smb_lock->llist, &rollback_list); + + argv = kmalloc(sizeof(void *), GFP_KERNEL); + if (!argv) { + err = -ENOMEM; + goto out; + } + argv[0] = flock; + + rc = setup_async_work(work, + smb2_remove_blocked_lock, + argv); + if (rc) { + err = -ENOMEM; + goto out; + } + spin_lock(&fp->f_lock); + list_add(&work->fp_entry, &fp->blocked_works); + spin_unlock(&fp->f_lock); + + smb2_send_interim_resp(work, STATUS_PENDING); + + ksmbd_vfs_posix_lock_wait(flock); + + spin_lock(&fp->f_lock); + list_del(&work->fp_entry); + spin_unlock(&fp->f_lock); + + if (work->state != KSMBD_WORK_ACTIVE) { + list_del(&smb_lock->llist); + spin_lock(&work->conn->llist_lock); + list_del(&smb_lock->clist); + spin_unlock(&work->conn->llist_lock); + locks_free_lock(flock); + + if (work->state == KSMBD_WORK_CANCELLED) { + rsp->hdr.Status = + STATUS_CANCELLED; + kfree(smb_lock); + smb2_send_interim_resp(work, + STATUS_CANCELLED); + work->send_no_response = 1; + goto out; + } + + init_smb2_rsp_hdr(work); + smb2_set_err_rsp(work); + rsp->hdr.Status = + STATUS_RANGE_NOT_LOCKED; + kfree(smb_lock); + goto out2; + } + + list_del(&smb_lock->llist); + spin_lock(&work->conn->llist_lock); + list_del(&smb_lock->clist); + spin_unlock(&work->conn->llist_lock); + release_async_work(work); + goto retry; + } else if (!rc) { + spin_lock(&work->conn->llist_lock); + list_add_tail(&smb_lock->clist, + &work->conn->lock_list); + list_add_tail(&smb_lock->flist, + &fp->lock_list); + spin_unlock(&work->conn->llist_lock); + list_add(&smb_lock->llist, &rollback_list); + ksmbd_debug(SMB, "successful in taking lock\n"); + } else { + goto out; + } + } + } + + if (atomic_read(&fp->f_ci->op_count) > 1) + smb_break_all_oplock(work, fp); + + rsp->StructureSize = cpu_to_le16(4); + ksmbd_debug(SMB, "successful in taking lock\n"); + rsp->hdr.Status = STATUS_SUCCESS; + rsp->Reserved = 0; + inc_rfc1001_len(work->response_buf, 4); + ksmbd_fd_put(work, fp); + return 0; + +out: + list_for_each_entry_safe(smb_lock, tmp, &lock_list, llist) { + locks_free_lock(smb_lock->fl); + list_del(&smb_lock->llist); + kfree(smb_lock); + } + + list_for_each_entry_safe(smb_lock, tmp, &rollback_list, llist) { + struct file_lock *rlock = NULL; + + rlock = smb_flock_init(filp); + rlock->fl_type = F_UNLCK; + rlock->fl_start = smb_lock->start; + rlock->fl_end = smb_lock->end; + + rc = vfs_lock_file(filp, F_SETLK, rlock, NULL); + if (rc) + pr_err("rollback unlock fail : %d\n", rc); + + list_del(&smb_lock->llist); + spin_lock(&work->conn->llist_lock); + if (!list_empty(&smb_lock->flist)) + list_del(&smb_lock->flist); + list_del(&smb_lock->clist); + spin_unlock(&work->conn->llist_lock); + + locks_free_lock(smb_lock->fl); + locks_free_lock(rlock); + kfree(smb_lock); + } +out2: + ksmbd_debug(SMB, "failed in taking lock(flags : %x), err : %d\n", flags, err); + + if (!rsp->hdr.Status) { + if (err == -EINVAL) + rsp->hdr.Status = STATUS_INVALID_PARAMETER; + else if (err == -ENOMEM) + rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES; + else if (err == -ENOENT) + rsp->hdr.Status = STATUS_FILE_CLOSED; + else + rsp->hdr.Status = STATUS_LOCK_NOT_GRANTED; + } + + smb2_set_err_rsp(work); + ksmbd_fd_put(work, fp); + return err; +} + +static int fsctl_copychunk(struct ksmbd_work *work, + struct copychunk_ioctl_req *ci_req, + unsigned int cnt_code, + unsigned int input_count, + unsigned long long volatile_id, + unsigned long long persistent_id, + struct smb2_ioctl_rsp *rsp) +{ + struct copychunk_ioctl_rsp *ci_rsp; + struct ksmbd_file *src_fp = NULL, *dst_fp = NULL; + struct srv_copychunk *chunks; + unsigned int i, chunk_count, chunk_count_written = 0; + unsigned int chunk_size_written = 0; + loff_t total_size_written = 0; + int ret = 0; + + ci_rsp = (struct copychunk_ioctl_rsp *)&rsp->Buffer[0]; + + rsp->VolatileFileId = volatile_id; + rsp->PersistentFileId = persistent_id; + ci_rsp->ChunksWritten = + cpu_to_le32(ksmbd_server_side_copy_max_chunk_count()); + ci_rsp->ChunkBytesWritten = + cpu_to_le32(ksmbd_server_side_copy_max_chunk_size()); + ci_rsp->TotalBytesWritten = + cpu_to_le32(ksmbd_server_side_copy_max_total_size()); + + chunks = (struct srv_copychunk *)&ci_req->Chunks[0]; + chunk_count = le32_to_cpu(ci_req->ChunkCount); + if (chunk_count == 0) + goto out; + total_size_written = 0; + + /* verify the SRV_COPYCHUNK_COPY packet */ + if (chunk_count > ksmbd_server_side_copy_max_chunk_count() || + input_count < offsetof(struct copychunk_ioctl_req, Chunks) + + chunk_count * sizeof(struct srv_copychunk)) { + rsp->hdr.Status = STATUS_INVALID_PARAMETER; + return -EINVAL; + } + + for (i = 0; i < chunk_count; i++) { + if (le32_to_cpu(chunks[i].Length) == 0 || + le32_to_cpu(chunks[i].Length) > ksmbd_server_side_copy_max_chunk_size()) + break; + total_size_written += le32_to_cpu(chunks[i].Length); + } + + if (i < chunk_count || + total_size_written > ksmbd_server_side_copy_max_total_size()) { + rsp->hdr.Status = STATUS_INVALID_PARAMETER; + return -EINVAL; + } + + src_fp = ksmbd_lookup_foreign_fd(work, + le64_to_cpu(ci_req->ResumeKey[0])); + dst_fp = ksmbd_lookup_fd_slow(work, volatile_id, persistent_id); + ret = -EINVAL; + if (!src_fp || + src_fp->persistent_id != le64_to_cpu(ci_req->ResumeKey[1])) { + rsp->hdr.Status = STATUS_OBJECT_NAME_NOT_FOUND; + goto out; + } + + if (!dst_fp) { + rsp->hdr.Status = STATUS_FILE_CLOSED; + goto out; + } + + /* + * FILE_READ_DATA should only be included in + * the FSCTL_COPYCHUNK case + */ + if (cnt_code == FSCTL_COPYCHUNK && + !(dst_fp->daccess & (FILE_READ_DATA_LE | FILE_GENERIC_READ_LE))) { + rsp->hdr.Status = STATUS_ACCESS_DENIED; + goto out; + } + + ret = ksmbd_vfs_copy_file_ranges(work, src_fp, dst_fp, + chunks, chunk_count, + &chunk_count_written, + &chunk_size_written, + &total_size_written); + if (ret < 0) { + if (ret == -EACCES) + rsp->hdr.Status = STATUS_ACCESS_DENIED; + if (ret == -EAGAIN) + rsp->hdr.Status = STATUS_FILE_LOCK_CONFLICT; + else if (ret == -EBADF) + rsp->hdr.Status = STATUS_INVALID_HANDLE; + else if (ret == -EFBIG || ret == -ENOSPC) + rsp->hdr.Status = STATUS_DISK_FULL; + else if (ret == -EINVAL) + rsp->hdr.Status = STATUS_INVALID_PARAMETER; + else if (ret == -EISDIR) + rsp->hdr.Status = STATUS_FILE_IS_A_DIRECTORY; + else if (ret == -E2BIG) + rsp->hdr.Status = STATUS_INVALID_VIEW_SIZE; + else + rsp->hdr.Status = STATUS_UNEXPECTED_IO_ERROR; + } + + ci_rsp->ChunksWritten = cpu_to_le32(chunk_count_written); + ci_rsp->ChunkBytesWritten = cpu_to_le32(chunk_size_written); + ci_rsp->TotalBytesWritten = cpu_to_le32(total_size_written); +out: + ksmbd_fd_put(work, src_fp); + ksmbd_fd_put(work, dst_fp); + return ret; +} + +static __be32 idev_ipv4_address(struct in_device *idev) +{ + __be32 addr = 0; + + struct in_ifaddr *ifa; + + rcu_read_lock(); + in_dev_for_each_ifa_rcu(ifa, idev) { + if (ifa->ifa_flags & IFA_F_SECONDARY) + continue; + + addr = ifa->ifa_address; + break; + } + rcu_read_unlock(); + return addr; +} + +static int fsctl_query_iface_info_ioctl(struct ksmbd_conn *conn, + struct smb2_ioctl_rsp *rsp, + unsigned int out_buf_len) +{ + struct network_interface_info_ioctl_rsp *nii_rsp = NULL; + int nbytes = 0; + struct net_device *netdev; + struct sockaddr_storage_rsp *sockaddr_storage; + unsigned int flags; + unsigned long long speed; + + rtnl_lock(); + for_each_netdev(&init_net, netdev) { + bool ipv4_set = false; + + if (netdev->type == ARPHRD_LOOPBACK) + continue; + + flags = dev_get_flags(netdev); + if (!(flags & IFF_RUNNING)) + continue; +ipv6_retry: + if (out_buf_len < + nbytes + sizeof(struct network_interface_info_ioctl_rsp)) { + rtnl_unlock(); + return -ENOSPC; + } + + nii_rsp = (struct network_interface_info_ioctl_rsp *) + &rsp->Buffer[nbytes]; + nii_rsp->IfIndex = cpu_to_le32(netdev->ifindex); + + nii_rsp->Capability = 0; + if (netdev->real_num_tx_queues > 1) + nii_rsp->Capability |= cpu_to_le32(RSS_CAPABLE); + if (ksmbd_rdma_capable_netdev(netdev)) + nii_rsp->Capability |= cpu_to_le32(RDMA_CAPABLE); + + nii_rsp->Next = cpu_to_le32(152); + nii_rsp->Reserved = 0; + + if (netdev->ethtool_ops->get_link_ksettings) { + struct ethtool_link_ksettings cmd; + + netdev->ethtool_ops->get_link_ksettings(netdev, &cmd); + speed = cmd.base.speed; + } else { + ksmbd_debug(SMB, "%s %s\n", netdev->name, + "speed is unknown, defaulting to 1Gb/sec"); + speed = SPEED_1000; + } + + speed *= 1000000; + nii_rsp->LinkSpeed = cpu_to_le64(speed); + + sockaddr_storage = (struct sockaddr_storage_rsp *) + nii_rsp->SockAddr_Storage; + memset(sockaddr_storage, 0, 128); + + if (!ipv4_set) { + struct in_device *idev; + + sockaddr_storage->Family = cpu_to_le16(INTERNETWORK); + sockaddr_storage->addr4.Port = 0; + + idev = __in_dev_get_rtnl(netdev); + if (!idev) + continue; + sockaddr_storage->addr4.IPv4address = + idev_ipv4_address(idev); + nbytes += sizeof(struct network_interface_info_ioctl_rsp); + ipv4_set = true; + goto ipv6_retry; + } else { + struct inet6_dev *idev6; + struct inet6_ifaddr *ifa; + __u8 *ipv6_addr = sockaddr_storage->addr6.IPv6address; + + sockaddr_storage->Family = cpu_to_le16(INTERNETWORKV6); + sockaddr_storage->addr6.Port = 0; + sockaddr_storage->addr6.FlowInfo = 0; + + idev6 = __in6_dev_get(netdev); + if (!idev6) + continue; + + list_for_each_entry(ifa, &idev6->addr_list, if_list) { + if (ifa->flags & (IFA_F_TENTATIVE | + IFA_F_DEPRECATED)) + continue; + memcpy(ipv6_addr, ifa->addr.s6_addr, 16); + break; + } + sockaddr_storage->addr6.ScopeId = 0; + nbytes += sizeof(struct network_interface_info_ioctl_rsp); + } + } + rtnl_unlock(); + + /* zero if this is last one */ + if (nii_rsp) + nii_rsp->Next = 0; + + rsp->PersistentFileId = SMB2_NO_FID; + rsp->VolatileFileId = SMB2_NO_FID; + return nbytes; +} + +static int fsctl_validate_negotiate_info(struct ksmbd_conn *conn, + struct validate_negotiate_info_req *neg_req, + struct validate_negotiate_info_rsp *neg_rsp, + unsigned int in_buf_len) +{ + int ret = 0; + int dialect; + + if (in_buf_len < offsetof(struct validate_negotiate_info_req, Dialects) + + le16_to_cpu(neg_req->DialectCount) * sizeof(__le16)) + return -EINVAL; + + dialect = ksmbd_lookup_dialect_by_id(neg_req->Dialects, + neg_req->DialectCount); + if (dialect == BAD_PROT_ID || dialect != conn->dialect) { + ret = -EINVAL; + goto err_out; + } + + if (strncmp(neg_req->Guid, conn->ClientGUID, SMB2_CLIENT_GUID_SIZE)) { + ret = -EINVAL; + goto err_out; + } + + if (le16_to_cpu(neg_req->SecurityMode) != conn->cli_sec_mode) { + ret = -EINVAL; + goto err_out; + } + + if (le32_to_cpu(neg_req->Capabilities) != conn->cli_cap) { + ret = -EINVAL; + goto err_out; + } + + neg_rsp->Capabilities = cpu_to_le32(conn->vals->capabilities); + memset(neg_rsp->Guid, 0, SMB2_CLIENT_GUID_SIZE); + neg_rsp->SecurityMode = cpu_to_le16(conn->srv_sec_mode); + neg_rsp->Dialect = cpu_to_le16(conn->dialect); +err_out: + return ret; +} + +static int fsctl_query_allocated_ranges(struct ksmbd_work *work, u64 id, + struct file_allocated_range_buffer *qar_req, + struct file_allocated_range_buffer *qar_rsp, + unsigned int in_count, unsigned int *out_count) +{ + struct ksmbd_file *fp; + loff_t start, length; + int ret = 0; + + *out_count = 0; + if (in_count == 0) + return -EINVAL; + + start = le64_to_cpu(qar_req->file_offset); + length = le64_to_cpu(qar_req->length); + + if (start < 0 || length < 0) + return -EINVAL; + + fp = ksmbd_lookup_fd_fast(work, id); + if (!fp) + return -ENOENT; + + ret = ksmbd_vfs_fqar_lseek(fp, start, length, + qar_rsp, in_count, out_count); + if (ret && ret != -E2BIG) + *out_count = 0; + + ksmbd_fd_put(work, fp); + return ret; +} + +static int fsctl_pipe_transceive(struct ksmbd_work *work, u64 id, + unsigned int out_buf_len, + struct smb2_ioctl_req *req, + struct smb2_ioctl_rsp *rsp) +{ + struct ksmbd_rpc_command *rpc_resp; + char *data_buf = (char *)&req->Buffer[0]; + int nbytes = 0; + + rpc_resp = ksmbd_rpc_ioctl(work->sess, id, data_buf, + le32_to_cpu(req->InputCount)); + if (rpc_resp) { + if (rpc_resp->flags == KSMBD_RPC_SOME_NOT_MAPPED) { + /* + * set STATUS_SOME_NOT_MAPPED response + * for unknown domain sid. + */ + rsp->hdr.Status = STATUS_SOME_NOT_MAPPED; + } else if (rpc_resp->flags == KSMBD_RPC_ENOTIMPLEMENTED) { + rsp->hdr.Status = STATUS_NOT_SUPPORTED; + goto out; + } else if (rpc_resp->flags != KSMBD_RPC_OK) { + rsp->hdr.Status = STATUS_INVALID_PARAMETER; + goto out; + } + + nbytes = rpc_resp->payload_sz; + if (rpc_resp->payload_sz > out_buf_len) { + rsp->hdr.Status = STATUS_BUFFER_OVERFLOW; + nbytes = out_buf_len; + } + + if (!rpc_resp->payload_sz) { + rsp->hdr.Status = + STATUS_UNEXPECTED_IO_ERROR; + goto out; + } + + memcpy((char *)rsp->Buffer, rpc_resp->payload, nbytes); + } +out: + kvfree(rpc_resp); + return nbytes; +} + +static inline int fsctl_set_sparse(struct ksmbd_work *work, u64 id, + struct file_sparse *sparse) +{ + struct ksmbd_file *fp; + struct mnt_idmap *idmap; + int ret = 0; + __le32 old_fattr; + + fp = ksmbd_lookup_fd_fast(work, id); + if (!fp) + return -ENOENT; + idmap = file_mnt_idmap(fp->filp); + + old_fattr = fp->f_ci->m_fattr; + if (sparse->SetSparse) + fp->f_ci->m_fattr |= FILE_ATTRIBUTE_SPARSE_FILE_LE; + else + fp->f_ci->m_fattr &= ~FILE_ATTRIBUTE_SPARSE_FILE_LE; + + if (fp->f_ci->m_fattr != old_fattr && + test_share_config_flag(work->tcon->share_conf, + KSMBD_SHARE_FLAG_STORE_DOS_ATTRS)) { + struct xattr_dos_attrib da; + + ret = ksmbd_vfs_get_dos_attrib_xattr(idmap, + fp->filp->f_path.dentry, &da); + if (ret <= 0) + goto out; + + da.attr = le32_to_cpu(fp->f_ci->m_fattr); + ret = ksmbd_vfs_set_dos_attrib_xattr(idmap, + fp->filp->f_path.dentry, &da); + if (ret) + fp->f_ci->m_fattr = old_fattr; + } + +out: + ksmbd_fd_put(work, fp); + return ret; +} + +static int fsctl_request_resume_key(struct ksmbd_work *work, + struct smb2_ioctl_req *req, + struct resume_key_ioctl_rsp *key_rsp) +{ + struct ksmbd_file *fp; + + fp = ksmbd_lookup_fd_slow(work, req->VolatileFileId, req->PersistentFileId); + if (!fp) + return -ENOENT; + + memset(key_rsp, 0, sizeof(*key_rsp)); + key_rsp->ResumeKey[0] = req->VolatileFileId; + key_rsp->ResumeKey[1] = req->PersistentFileId; + ksmbd_fd_put(work, fp); + + return 0; +} + +/** + * smb2_ioctl() - handler for smb2 ioctl command + * @work: smb work containing ioctl command buffer + * + * Return: 0 on success, otherwise error + */ +int smb2_ioctl(struct ksmbd_work *work) +{ + struct smb2_ioctl_req *req; + struct smb2_ioctl_rsp *rsp; + unsigned int cnt_code, nbytes = 0, out_buf_len, in_buf_len; + u64 id = KSMBD_NO_FID; + struct ksmbd_conn *conn = work->conn; + int ret = 0; + + if (work->next_smb2_rcv_hdr_off) { + req = ksmbd_req_buf_next(work); + rsp = ksmbd_resp_buf_next(work); + if (!has_file_id(req->VolatileFileId)) { + ksmbd_debug(SMB, "Compound request set FID = %llu\n", + work->compound_fid); + id = work->compound_fid; + } + } else { + req = smb2_get_msg(work->request_buf); + rsp = smb2_get_msg(work->response_buf); + } + + if (!has_file_id(id)) + id = req->VolatileFileId; + + if (req->Flags != cpu_to_le32(SMB2_0_IOCTL_IS_FSCTL)) { + rsp->hdr.Status = STATUS_NOT_SUPPORTED; + goto out; + } + + cnt_code = le32_to_cpu(req->CtlCode); + ret = smb2_calc_max_out_buf_len(work, 48, + le32_to_cpu(req->MaxOutputResponse)); + if (ret < 0) { + rsp->hdr.Status = STATUS_INVALID_PARAMETER; + goto out; + } + out_buf_len = (unsigned int)ret; + in_buf_len = le32_to_cpu(req->InputCount); + + switch (cnt_code) { + case FSCTL_DFS_GET_REFERRALS: + case FSCTL_DFS_GET_REFERRALS_EX: + /* Not support DFS yet */ + rsp->hdr.Status = STATUS_FS_DRIVER_REQUIRED; + goto out; + case FSCTL_CREATE_OR_GET_OBJECT_ID: + { + struct file_object_buf_type1_ioctl_rsp *obj_buf; + + nbytes = sizeof(struct file_object_buf_type1_ioctl_rsp); + obj_buf = (struct file_object_buf_type1_ioctl_rsp *) + &rsp->Buffer[0]; + + /* + * TODO: This is dummy implementation to pass smbtorture + * Need to check correct response later + */ + memset(obj_buf->ObjectId, 0x0, 16); + memset(obj_buf->BirthVolumeId, 0x0, 16); + memset(obj_buf->BirthObjectId, 0x0, 16); + memset(obj_buf->DomainId, 0x0, 16); + + break; + } + case FSCTL_PIPE_TRANSCEIVE: + out_buf_len = min_t(u32, KSMBD_IPC_MAX_PAYLOAD, out_buf_len); + nbytes = fsctl_pipe_transceive(work, id, out_buf_len, req, rsp); + break; + case FSCTL_VALIDATE_NEGOTIATE_INFO: + if (conn->dialect < SMB30_PROT_ID) { + ret = -EOPNOTSUPP; + goto out; + } + + if (in_buf_len < offsetof(struct validate_negotiate_info_req, + Dialects)) { + ret = -EINVAL; + goto out; + } + + if (out_buf_len < sizeof(struct validate_negotiate_info_rsp)) { + ret = -EINVAL; + goto out; + } + + ret = fsctl_validate_negotiate_info(conn, + (struct validate_negotiate_info_req *)&req->Buffer[0], + (struct validate_negotiate_info_rsp *)&rsp->Buffer[0], + in_buf_len); + if (ret < 0) + goto out; + + nbytes = sizeof(struct validate_negotiate_info_rsp); + rsp->PersistentFileId = SMB2_NO_FID; + rsp->VolatileFileId = SMB2_NO_FID; + break; + case FSCTL_QUERY_NETWORK_INTERFACE_INFO: + ret = fsctl_query_iface_info_ioctl(conn, rsp, out_buf_len); + if (ret < 0) + goto out; + nbytes = ret; + break; + case FSCTL_REQUEST_RESUME_KEY: + if (out_buf_len < sizeof(struct resume_key_ioctl_rsp)) { + ret = -EINVAL; + goto out; + } + + ret = fsctl_request_resume_key(work, req, + (struct resume_key_ioctl_rsp *)&rsp->Buffer[0]); + if (ret < 0) + goto out; + rsp->PersistentFileId = req->PersistentFileId; + rsp->VolatileFileId = req->VolatileFileId; + nbytes = sizeof(struct resume_key_ioctl_rsp); + break; + case FSCTL_COPYCHUNK: + case FSCTL_COPYCHUNK_WRITE: + if (!test_tree_conn_flag(work->tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) { + ksmbd_debug(SMB, + "User does not have write permission\n"); + ret = -EACCES; + goto out; + } + + if (in_buf_len < sizeof(struct copychunk_ioctl_req)) { + ret = -EINVAL; + goto out; + } + + if (out_buf_len < sizeof(struct copychunk_ioctl_rsp)) { + ret = -EINVAL; + goto out; + } + + nbytes = sizeof(struct copychunk_ioctl_rsp); + rsp->VolatileFileId = req->VolatileFileId; + rsp->PersistentFileId = req->PersistentFileId; + fsctl_copychunk(work, + (struct copychunk_ioctl_req *)&req->Buffer[0], + le32_to_cpu(req->CtlCode), + le32_to_cpu(req->InputCount), + req->VolatileFileId, + req->PersistentFileId, + rsp); + break; + case FSCTL_SET_SPARSE: + if (in_buf_len < sizeof(struct file_sparse)) { + ret = -EINVAL; + goto out; + } + + ret = fsctl_set_sparse(work, id, + (struct file_sparse *)&req->Buffer[0]); + if (ret < 0) + goto out; + break; + case FSCTL_SET_ZERO_DATA: + { + struct file_zero_data_information *zero_data; + struct ksmbd_file *fp; + loff_t off, len, bfz; + + if (!test_tree_conn_flag(work->tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) { + ksmbd_debug(SMB, + "User does not have write permission\n"); + ret = -EACCES; + goto out; + } + + if (in_buf_len < sizeof(struct file_zero_data_information)) { + ret = -EINVAL; + goto out; + } + + zero_data = + (struct file_zero_data_information *)&req->Buffer[0]; + + off = le64_to_cpu(zero_data->FileOffset); + bfz = le64_to_cpu(zero_data->BeyondFinalZero); + if (off < 0 || bfz < 0 || off > bfz) { + ret = -EINVAL; + goto out; + } + + len = bfz - off; + if (len) { + fp = ksmbd_lookup_fd_fast(work, id); + if (!fp) { + ret = -ENOENT; + goto out; + } + + ret = ksmbd_vfs_zero_data(work, fp, off, len); + ksmbd_fd_put(work, fp); + if (ret < 0) + goto out; + } + break; + } + case FSCTL_QUERY_ALLOCATED_RANGES: + if (in_buf_len < sizeof(struct file_allocated_range_buffer)) { + ret = -EINVAL; + goto out; + } + + ret = fsctl_query_allocated_ranges(work, id, + (struct file_allocated_range_buffer *)&req->Buffer[0], + (struct file_allocated_range_buffer *)&rsp->Buffer[0], + out_buf_len / + sizeof(struct file_allocated_range_buffer), &nbytes); + if (ret == -E2BIG) { + rsp->hdr.Status = STATUS_BUFFER_OVERFLOW; + } else if (ret < 0) { + nbytes = 0; + goto out; + } + + nbytes *= sizeof(struct file_allocated_range_buffer); + break; + case FSCTL_GET_REPARSE_POINT: + { + struct reparse_data_buffer *reparse_ptr; + struct ksmbd_file *fp; + + reparse_ptr = (struct reparse_data_buffer *)&rsp->Buffer[0]; + fp = ksmbd_lookup_fd_fast(work, id); + if (!fp) { + pr_err("not found fp!!\n"); + ret = -ENOENT; + goto out; + } + + reparse_ptr->ReparseTag = + smb2_get_reparse_tag_special_file(file_inode(fp->filp)->i_mode); + reparse_ptr->ReparseDataLength = 0; + ksmbd_fd_put(work, fp); + nbytes = sizeof(struct reparse_data_buffer); + break; + } + case FSCTL_DUPLICATE_EXTENTS_TO_FILE: + { + struct ksmbd_file *fp_in, *fp_out = NULL; + struct duplicate_extents_to_file *dup_ext; + loff_t src_off, dst_off, length, cloned; + + if (in_buf_len < sizeof(struct duplicate_extents_to_file)) { + ret = -EINVAL; + goto out; + } + + dup_ext = (struct duplicate_extents_to_file *)&req->Buffer[0]; + + fp_in = ksmbd_lookup_fd_slow(work, dup_ext->VolatileFileHandle, + dup_ext->PersistentFileHandle); + if (!fp_in) { + pr_err("not found file handle in duplicate extent to file\n"); + ret = -ENOENT; + goto out; + } + + fp_out = ksmbd_lookup_fd_fast(work, id); + if (!fp_out) { + pr_err("not found fp\n"); + ret = -ENOENT; + goto dup_ext_out; + } + + src_off = le64_to_cpu(dup_ext->SourceFileOffset); + dst_off = le64_to_cpu(dup_ext->TargetFileOffset); + length = le64_to_cpu(dup_ext->ByteCount); + /* + * XXX: It is not clear if FSCTL_DUPLICATE_EXTENTS_TO_FILE + * should fall back to vfs_copy_file_range(). This could be + * beneficial when re-exporting nfs/smb mount, but note that + * this can result in partial copy that returns an error status. + * If/when FSCTL_DUPLICATE_EXTENTS_TO_FILE_EX is implemented, + * fall back to vfs_copy_file_range(), should be avoided when + * the flag DUPLICATE_EXTENTS_DATA_EX_SOURCE_ATOMIC is set. + */ + cloned = vfs_clone_file_range(fp_in->filp, src_off, + fp_out->filp, dst_off, length, 0); + if (cloned == -EXDEV || cloned == -EOPNOTSUPP) { + ret = -EOPNOTSUPP; + goto dup_ext_out; + } else if (cloned != length) { + cloned = vfs_copy_file_range(fp_in->filp, src_off, + fp_out->filp, dst_off, + length, 0); + if (cloned != length) { + if (cloned < 0) + ret = cloned; + else + ret = -EINVAL; + } + } + +dup_ext_out: + ksmbd_fd_put(work, fp_in); + ksmbd_fd_put(work, fp_out); + if (ret < 0) + goto out; + break; + } + default: + ksmbd_debug(SMB, "not implemented yet ioctl command 0x%x\n", + cnt_code); + ret = -EOPNOTSUPP; + goto out; + } + + rsp->CtlCode = cpu_to_le32(cnt_code); + rsp->InputCount = cpu_to_le32(0); + rsp->InputOffset = cpu_to_le32(112); + rsp->OutputOffset = cpu_to_le32(112); + rsp->OutputCount = cpu_to_le32(nbytes); + rsp->StructureSize = cpu_to_le16(49); + rsp->Reserved = cpu_to_le16(0); + rsp->Flags = cpu_to_le32(0); + rsp->Reserved2 = cpu_to_le32(0); + inc_rfc1001_len(work->response_buf, 48 + nbytes); + + return 0; + +out: + if (ret == -EACCES) + rsp->hdr.Status = STATUS_ACCESS_DENIED; + else if (ret == -ENOENT) + rsp->hdr.Status = STATUS_OBJECT_NAME_NOT_FOUND; + else if (ret == -EOPNOTSUPP) + rsp->hdr.Status = STATUS_NOT_SUPPORTED; + else if (ret == -ENOSPC) + rsp->hdr.Status = STATUS_BUFFER_TOO_SMALL; + else if (ret < 0 || rsp->hdr.Status == 0) + rsp->hdr.Status = STATUS_INVALID_PARAMETER; + smb2_set_err_rsp(work); + return 0; +} + +/** + * smb20_oplock_break_ack() - handler for smb2.0 oplock break command + * @work: smb work containing oplock break command buffer + * + * Return: 0 + */ +static void smb20_oplock_break_ack(struct ksmbd_work *work) +{ + struct smb2_oplock_break *req = smb2_get_msg(work->request_buf); + struct smb2_oplock_break *rsp = smb2_get_msg(work->response_buf); + struct ksmbd_file *fp; + struct oplock_info *opinfo = NULL; + __le32 err = 0; + int ret = 0; + u64 volatile_id, persistent_id; + char req_oplevel = 0, rsp_oplevel = 0; + unsigned int oplock_change_type; + + volatile_id = req->VolatileFid; + persistent_id = req->PersistentFid; + req_oplevel = req->OplockLevel; + ksmbd_debug(OPLOCK, "v_id %llu, p_id %llu request oplock level %d\n", + volatile_id, persistent_id, req_oplevel); + + fp = ksmbd_lookup_fd_slow(work, volatile_id, persistent_id); + if (!fp) { + rsp->hdr.Status = STATUS_FILE_CLOSED; + smb2_set_err_rsp(work); + return; + } + + opinfo = opinfo_get(fp); + if (!opinfo) { + pr_err("unexpected null oplock_info\n"); + rsp->hdr.Status = STATUS_INVALID_OPLOCK_PROTOCOL; + smb2_set_err_rsp(work); + ksmbd_fd_put(work, fp); + return; + } + + if (opinfo->level == SMB2_OPLOCK_LEVEL_NONE) { + rsp->hdr.Status = STATUS_INVALID_OPLOCK_PROTOCOL; + goto err_out; + } + + if (opinfo->op_state == OPLOCK_STATE_NONE) { + ksmbd_debug(SMB, "unexpected oplock state 0x%x\n", opinfo->op_state); + rsp->hdr.Status = STATUS_UNSUCCESSFUL; + goto err_out; + } + + if ((opinfo->level == SMB2_OPLOCK_LEVEL_EXCLUSIVE || + opinfo->level == SMB2_OPLOCK_LEVEL_BATCH) && + (req_oplevel != SMB2_OPLOCK_LEVEL_II && + req_oplevel != SMB2_OPLOCK_LEVEL_NONE)) { + err = STATUS_INVALID_OPLOCK_PROTOCOL; + oplock_change_type = OPLOCK_WRITE_TO_NONE; + } else if (opinfo->level == SMB2_OPLOCK_LEVEL_II && + req_oplevel != SMB2_OPLOCK_LEVEL_NONE) { + err = STATUS_INVALID_OPLOCK_PROTOCOL; + oplock_change_type = OPLOCK_READ_TO_NONE; + } else if (req_oplevel == SMB2_OPLOCK_LEVEL_II || + req_oplevel == SMB2_OPLOCK_LEVEL_NONE) { + err = STATUS_INVALID_DEVICE_STATE; + if ((opinfo->level == SMB2_OPLOCK_LEVEL_EXCLUSIVE || + opinfo->level == SMB2_OPLOCK_LEVEL_BATCH) && + req_oplevel == SMB2_OPLOCK_LEVEL_II) { + oplock_change_type = OPLOCK_WRITE_TO_READ; + } else if ((opinfo->level == SMB2_OPLOCK_LEVEL_EXCLUSIVE || + opinfo->level == SMB2_OPLOCK_LEVEL_BATCH) && + req_oplevel == SMB2_OPLOCK_LEVEL_NONE) { + oplock_change_type = OPLOCK_WRITE_TO_NONE; + } else if (opinfo->level == SMB2_OPLOCK_LEVEL_II && + req_oplevel == SMB2_OPLOCK_LEVEL_NONE) { + oplock_change_type = OPLOCK_READ_TO_NONE; + } else { + oplock_change_type = 0; + } + } else { + oplock_change_type = 0; + } + + switch (oplock_change_type) { + case OPLOCK_WRITE_TO_READ: + ret = opinfo_write_to_read(opinfo); + rsp_oplevel = SMB2_OPLOCK_LEVEL_II; + break; + case OPLOCK_WRITE_TO_NONE: + ret = opinfo_write_to_none(opinfo); + rsp_oplevel = SMB2_OPLOCK_LEVEL_NONE; + break; + case OPLOCK_READ_TO_NONE: + ret = opinfo_read_to_none(opinfo); + rsp_oplevel = SMB2_OPLOCK_LEVEL_NONE; + break; + default: + pr_err("unknown oplock change 0x%x -> 0x%x\n", + opinfo->level, rsp_oplevel); + } + + if (ret < 0) { + rsp->hdr.Status = err; + goto err_out; + } + + opinfo_put(opinfo); + ksmbd_fd_put(work, fp); + opinfo->op_state = OPLOCK_STATE_NONE; + wake_up_interruptible_all(&opinfo->oplock_q); + + rsp->StructureSize = cpu_to_le16(24); + rsp->OplockLevel = rsp_oplevel; + rsp->Reserved = 0; + rsp->Reserved2 = 0; + rsp->VolatileFid = volatile_id; + rsp->PersistentFid = persistent_id; + inc_rfc1001_len(work->response_buf, 24); + return; + +err_out: + opinfo->op_state = OPLOCK_STATE_NONE; + wake_up_interruptible_all(&opinfo->oplock_q); + + opinfo_put(opinfo); + ksmbd_fd_put(work, fp); + smb2_set_err_rsp(work); +} + +static int check_lease_state(struct lease *lease, __le32 req_state) +{ + if ((lease->new_state == + (SMB2_LEASE_READ_CACHING_LE | SMB2_LEASE_HANDLE_CACHING_LE)) && + !(req_state & SMB2_LEASE_WRITE_CACHING_LE)) { + lease->new_state = req_state; + return 0; + } + + if (lease->new_state == req_state) + return 0; + + return 1; +} + +/** + * smb21_lease_break_ack() - handler for smb2.1 lease break command + * @work: smb work containing lease break command buffer + * + * Return: 0 + */ +static void smb21_lease_break_ack(struct ksmbd_work *work) +{ + struct ksmbd_conn *conn = work->conn; + struct smb2_lease_ack *req = smb2_get_msg(work->request_buf); + struct smb2_lease_ack *rsp = smb2_get_msg(work->response_buf); + struct oplock_info *opinfo; + __le32 err = 0; + int ret = 0; + unsigned int lease_change_type; + __le32 lease_state; + struct lease *lease; + + ksmbd_debug(OPLOCK, "smb21 lease break, lease state(0x%x)\n", + le32_to_cpu(req->LeaseState)); + opinfo = lookup_lease_in_table(conn, req->LeaseKey); + if (!opinfo) { + ksmbd_debug(OPLOCK, "file not opened\n"); + smb2_set_err_rsp(work); + rsp->hdr.Status = STATUS_UNSUCCESSFUL; + return; + } + lease = opinfo->o_lease; + + if (opinfo->op_state == OPLOCK_STATE_NONE) { + pr_err("unexpected lease break state 0x%x\n", + opinfo->op_state); + rsp->hdr.Status = STATUS_UNSUCCESSFUL; + goto err_out; + } + + if (check_lease_state(lease, req->LeaseState)) { + rsp->hdr.Status = STATUS_REQUEST_NOT_ACCEPTED; + ksmbd_debug(OPLOCK, + "req lease state: 0x%x, expected state: 0x%x\n", + req->LeaseState, lease->new_state); + goto err_out; + } + + if (!atomic_read(&opinfo->breaking_cnt)) { + rsp->hdr.Status = STATUS_UNSUCCESSFUL; + goto err_out; + } + + /* check for bad lease state */ + if (req->LeaseState & + (~(SMB2_LEASE_READ_CACHING_LE | SMB2_LEASE_HANDLE_CACHING_LE))) { + err = STATUS_INVALID_OPLOCK_PROTOCOL; + if (lease->state & SMB2_LEASE_WRITE_CACHING_LE) + lease_change_type = OPLOCK_WRITE_TO_NONE; + else + lease_change_type = OPLOCK_READ_TO_NONE; + ksmbd_debug(OPLOCK, "handle bad lease state 0x%x -> 0x%x\n", + le32_to_cpu(lease->state), + le32_to_cpu(req->LeaseState)); + } else if (lease->state == SMB2_LEASE_READ_CACHING_LE && + req->LeaseState != SMB2_LEASE_NONE_LE) { + err = STATUS_INVALID_OPLOCK_PROTOCOL; + lease_change_type = OPLOCK_READ_TO_NONE; + ksmbd_debug(OPLOCK, "handle bad lease state 0x%x -> 0x%x\n", + le32_to_cpu(lease->state), + le32_to_cpu(req->LeaseState)); + } else { + /* valid lease state changes */ + err = STATUS_INVALID_DEVICE_STATE; + if (req->LeaseState == SMB2_LEASE_NONE_LE) { + if (lease->state & SMB2_LEASE_WRITE_CACHING_LE) + lease_change_type = OPLOCK_WRITE_TO_NONE; + else + lease_change_type = OPLOCK_READ_TO_NONE; + } else if (req->LeaseState & SMB2_LEASE_READ_CACHING_LE) { + if (lease->state & SMB2_LEASE_WRITE_CACHING_LE) + lease_change_type = OPLOCK_WRITE_TO_READ; + else + lease_change_type = OPLOCK_READ_HANDLE_TO_READ; + } else { + lease_change_type = 0; + } + } + + switch (lease_change_type) { + case OPLOCK_WRITE_TO_READ: + ret = opinfo_write_to_read(opinfo); + break; + case OPLOCK_READ_HANDLE_TO_READ: + ret = opinfo_read_handle_to_read(opinfo); + break; + case OPLOCK_WRITE_TO_NONE: + ret = opinfo_write_to_none(opinfo); + break; + case OPLOCK_READ_TO_NONE: + ret = opinfo_read_to_none(opinfo); + break; + default: + ksmbd_debug(OPLOCK, "unknown lease change 0x%x -> 0x%x\n", + le32_to_cpu(lease->state), + le32_to_cpu(req->LeaseState)); + } + + lease_state = lease->state; + opinfo->op_state = OPLOCK_STATE_NONE; + wake_up_interruptible_all(&opinfo->oplock_q); + atomic_dec(&opinfo->breaking_cnt); + wake_up_interruptible_all(&opinfo->oplock_brk); + opinfo_put(opinfo); + + if (ret < 0) { + rsp->hdr.Status = err; + goto err_out; + } + + rsp->StructureSize = cpu_to_le16(36); + rsp->Reserved = 0; + rsp->Flags = 0; + memcpy(rsp->LeaseKey, req->LeaseKey, 16); + rsp->LeaseState = lease_state; + rsp->LeaseDuration = 0; + inc_rfc1001_len(work->response_buf, 36); + return; + +err_out: + opinfo->op_state = OPLOCK_STATE_NONE; + wake_up_interruptible_all(&opinfo->oplock_q); + atomic_dec(&opinfo->breaking_cnt); + wake_up_interruptible_all(&opinfo->oplock_brk); + + opinfo_put(opinfo); + smb2_set_err_rsp(work); +} + +/** + * smb2_oplock_break() - dispatcher for smb2.0 and 2.1 oplock/lease break + * @work: smb work containing oplock/lease break command buffer + * + * Return: 0 + */ +int smb2_oplock_break(struct ksmbd_work *work) +{ + struct smb2_oplock_break *req = smb2_get_msg(work->request_buf); + struct smb2_oplock_break *rsp = smb2_get_msg(work->response_buf); + + switch (le16_to_cpu(req->StructureSize)) { + case OP_BREAK_STRUCT_SIZE_20: + smb20_oplock_break_ack(work); + break; + case OP_BREAK_STRUCT_SIZE_21: + smb21_lease_break_ack(work); + break; + default: + ksmbd_debug(OPLOCK, "invalid break cmd %d\n", + le16_to_cpu(req->StructureSize)); + rsp->hdr.Status = STATUS_INVALID_PARAMETER; + smb2_set_err_rsp(work); + } + + return 0; +} + +/** + * smb2_notify() - handler for smb2 notify request + * @work: smb work containing notify command buffer + * + * Return: 0 + */ +int smb2_notify(struct ksmbd_work *work) +{ + struct smb2_change_notify_req *req; + struct smb2_change_notify_rsp *rsp; + + WORK_BUFFERS(work, req, rsp); + + if (work->next_smb2_rcv_hdr_off && req->hdr.NextCommand) { + rsp->hdr.Status = STATUS_INTERNAL_ERROR; + smb2_set_err_rsp(work); + return 0; + } + + smb2_set_err_rsp(work); + rsp->hdr.Status = STATUS_NOT_IMPLEMENTED; + return 0; +} + +/** + * smb2_is_sign_req() - handler for checking packet signing status + * @work: smb work containing notify command buffer + * @command: SMB2 command id + * + * Return: true if packed is signed, false otherwise + */ +bool smb2_is_sign_req(struct ksmbd_work *work, unsigned int command) +{ + struct smb2_hdr *rcv_hdr2 = smb2_get_msg(work->request_buf); + + if ((rcv_hdr2->Flags & SMB2_FLAGS_SIGNED) && + command != SMB2_NEGOTIATE_HE && + command != SMB2_SESSION_SETUP_HE && + command != SMB2_OPLOCK_BREAK_HE) + return true; + + return false; +} + +/** + * smb2_check_sign_req() - handler for req packet sign processing + * @work: smb work containing notify command buffer + * + * Return: 1 on success, 0 otherwise + */ +int smb2_check_sign_req(struct ksmbd_work *work) +{ + struct smb2_hdr *hdr; + char signature_req[SMB2_SIGNATURE_SIZE]; + char signature[SMB2_HMACSHA256_SIZE]; + struct kvec iov[1]; + size_t len; + + hdr = smb2_get_msg(work->request_buf); + if (work->next_smb2_rcv_hdr_off) + hdr = ksmbd_req_buf_next(work); + + if (!hdr->NextCommand && !work->next_smb2_rcv_hdr_off) + len = get_rfc1002_len(work->request_buf); + else if (hdr->NextCommand) + len = le32_to_cpu(hdr->NextCommand); + else + len = get_rfc1002_len(work->request_buf) - + work->next_smb2_rcv_hdr_off; + + memcpy(signature_req, hdr->Signature, SMB2_SIGNATURE_SIZE); + memset(hdr->Signature, 0, SMB2_SIGNATURE_SIZE); + + iov[0].iov_base = (char *)&hdr->ProtocolId; + iov[0].iov_len = len; + + if (ksmbd_sign_smb2_pdu(work->conn, work->sess->sess_key, iov, 1, + signature)) + return 0; + + if (memcmp(signature, signature_req, SMB2_SIGNATURE_SIZE)) { + pr_err("bad smb2 signature\n"); + return 0; + } + + return 1; +} + +/** + * smb2_set_sign_rsp() - handler for rsp packet sign processing + * @work: smb work containing notify command buffer + * + */ +void smb2_set_sign_rsp(struct ksmbd_work *work) +{ + struct smb2_hdr *hdr; + struct smb2_hdr *req_hdr; + char signature[SMB2_HMACSHA256_SIZE]; + struct kvec iov[2]; + size_t len; + int n_vec = 1; + + hdr = smb2_get_msg(work->response_buf); + if (work->next_smb2_rsp_hdr_off) + hdr = ksmbd_resp_buf_next(work); + + req_hdr = ksmbd_req_buf_next(work); + + if (!work->next_smb2_rsp_hdr_off) { + len = get_rfc1002_len(work->response_buf); + if (req_hdr->NextCommand) + len = ALIGN(len, 8); + } else { + len = get_rfc1002_len(work->response_buf) - + work->next_smb2_rsp_hdr_off; + len = ALIGN(len, 8); + } + + if (req_hdr->NextCommand) + hdr->NextCommand = cpu_to_le32(len); + + hdr->Flags |= SMB2_FLAGS_SIGNED; + memset(hdr->Signature, 0, SMB2_SIGNATURE_SIZE); + + iov[0].iov_base = (char *)&hdr->ProtocolId; + iov[0].iov_len = len; + + if (work->aux_payload_sz) { + iov[0].iov_len -= work->aux_payload_sz; + + iov[1].iov_base = work->aux_payload_buf; + iov[1].iov_len = work->aux_payload_sz; + n_vec++; + } + + if (!ksmbd_sign_smb2_pdu(work->conn, work->sess->sess_key, iov, n_vec, + signature)) + memcpy(hdr->Signature, signature, SMB2_SIGNATURE_SIZE); +} + +/** + * smb3_check_sign_req() - handler for req packet sign processing + * @work: smb work containing notify command buffer + * + * Return: 1 on success, 0 otherwise + */ +int smb3_check_sign_req(struct ksmbd_work *work) +{ + struct ksmbd_conn *conn = work->conn; + char *signing_key; + struct smb2_hdr *hdr; + struct channel *chann; + char signature_req[SMB2_SIGNATURE_SIZE]; + char signature[SMB2_CMACAES_SIZE]; + struct kvec iov[1]; + size_t len; + + hdr = smb2_get_msg(work->request_buf); + if (work->next_smb2_rcv_hdr_off) + hdr = ksmbd_req_buf_next(work); + + if (!hdr->NextCommand && !work->next_smb2_rcv_hdr_off) + len = get_rfc1002_len(work->request_buf); + else if (hdr->NextCommand) + len = le32_to_cpu(hdr->NextCommand); + else + len = get_rfc1002_len(work->request_buf) - + work->next_smb2_rcv_hdr_off; + + if (le16_to_cpu(hdr->Command) == SMB2_SESSION_SETUP_HE) { + signing_key = work->sess->smb3signingkey; + } else { + chann = lookup_chann_list(work->sess, conn); + if (!chann) { + return 0; + } + signing_key = chann->smb3signingkey; + } + + if (!signing_key) { + pr_err("SMB3 signing key is not generated\n"); + return 0; + } + + memcpy(signature_req, hdr->Signature, SMB2_SIGNATURE_SIZE); + memset(hdr->Signature, 0, SMB2_SIGNATURE_SIZE); + iov[0].iov_base = (char *)&hdr->ProtocolId; + iov[0].iov_len = len; + + if (ksmbd_sign_smb3_pdu(conn, signing_key, iov, 1, signature)) + return 0; + + if (memcmp(signature, signature_req, SMB2_SIGNATURE_SIZE)) { + pr_err("bad smb2 signature\n"); + return 0; + } + + return 1; +} + +/** + * smb3_set_sign_rsp() - handler for rsp packet sign processing + * @work: smb work containing notify command buffer + * + */ +void smb3_set_sign_rsp(struct ksmbd_work *work) +{ + struct ksmbd_conn *conn = work->conn; + struct smb2_hdr *req_hdr, *hdr; + struct channel *chann; + char signature[SMB2_CMACAES_SIZE]; + struct kvec iov[2]; + int n_vec = 1; + size_t len; + char *signing_key; + + hdr = smb2_get_msg(work->response_buf); + if (work->next_smb2_rsp_hdr_off) + hdr = ksmbd_resp_buf_next(work); + + req_hdr = ksmbd_req_buf_next(work); + + if (!work->next_smb2_rsp_hdr_off) { + len = get_rfc1002_len(work->response_buf); + if (req_hdr->NextCommand) + len = ALIGN(len, 8); + } else { + len = get_rfc1002_len(work->response_buf) - + work->next_smb2_rsp_hdr_off; + len = ALIGN(len, 8); + } + + if (conn->binding == false && + le16_to_cpu(hdr->Command) == SMB2_SESSION_SETUP_HE) { + signing_key = work->sess->smb3signingkey; + } else { + chann = lookup_chann_list(work->sess, work->conn); + if (!chann) { + return; + } + signing_key = chann->smb3signingkey; + } + + if (!signing_key) + return; + + if (req_hdr->NextCommand) + hdr->NextCommand = cpu_to_le32(len); + + hdr->Flags |= SMB2_FLAGS_SIGNED; + memset(hdr->Signature, 0, SMB2_SIGNATURE_SIZE); + iov[0].iov_base = (char *)&hdr->ProtocolId; + iov[0].iov_len = len; + if (work->aux_payload_sz) { + iov[0].iov_len -= work->aux_payload_sz; + iov[1].iov_base = work->aux_payload_buf; + iov[1].iov_len = work->aux_payload_sz; + n_vec++; + } + + if (!ksmbd_sign_smb3_pdu(conn, signing_key, iov, n_vec, signature)) + memcpy(hdr->Signature, signature, SMB2_SIGNATURE_SIZE); +} + +/** + * smb3_preauth_hash_rsp() - handler for computing preauth hash on response + * @work: smb work containing response buffer + * + */ +void smb3_preauth_hash_rsp(struct ksmbd_work *work) +{ + struct ksmbd_conn *conn = work->conn; + struct ksmbd_session *sess = work->sess; + struct smb2_hdr *req, *rsp; + + if (conn->dialect != SMB311_PROT_ID) + return; + + WORK_BUFFERS(work, req, rsp); + + if (le16_to_cpu(req->Command) == SMB2_NEGOTIATE_HE && + conn->preauth_info) + ksmbd_gen_preauth_integrity_hash(conn, work->response_buf, + conn->preauth_info->Preauth_HashValue); + + if (le16_to_cpu(rsp->Command) == SMB2_SESSION_SETUP_HE && sess) { + __u8 *hash_value; + + if (conn->binding) { + struct preauth_session *preauth_sess; + + preauth_sess = ksmbd_preauth_session_lookup(conn, sess->id); + if (!preauth_sess) + return; + hash_value = preauth_sess->Preauth_HashValue; + } else { + hash_value = sess->Preauth_HashValue; + if (!hash_value) + return; + } + ksmbd_gen_preauth_integrity_hash(conn, work->response_buf, + hash_value); + } +} + +static void fill_transform_hdr(void *tr_buf, char *old_buf, __le16 cipher_type) +{ + struct smb2_transform_hdr *tr_hdr = tr_buf + 4; + struct smb2_hdr *hdr = smb2_get_msg(old_buf); + unsigned int orig_len = get_rfc1002_len(old_buf); + + /* tr_buf must be cleared by the caller */ + tr_hdr->ProtocolId = SMB2_TRANSFORM_PROTO_NUM; + tr_hdr->OriginalMessageSize = cpu_to_le32(orig_len); + tr_hdr->Flags = cpu_to_le16(TRANSFORM_FLAG_ENCRYPTED); + if (cipher_type == SMB2_ENCRYPTION_AES128_GCM || + cipher_type == SMB2_ENCRYPTION_AES256_GCM) + get_random_bytes(&tr_hdr->Nonce, SMB3_AES_GCM_NONCE); + else + get_random_bytes(&tr_hdr->Nonce, SMB3_AES_CCM_NONCE); + memcpy(&tr_hdr->SessionId, &hdr->SessionId, 8); + inc_rfc1001_len(tr_buf, sizeof(struct smb2_transform_hdr)); + inc_rfc1001_len(tr_buf, orig_len); +} + +int smb3_encrypt_resp(struct ksmbd_work *work) +{ + char *buf = work->response_buf; + struct kvec iov[3]; + int rc = -ENOMEM; + int buf_size = 0, rq_nvec = 2 + (work->aux_payload_sz ? 1 : 0); + + if (ARRAY_SIZE(iov) < rq_nvec) + return -ENOMEM; + + work->tr_buf = kzalloc(sizeof(struct smb2_transform_hdr) + 4, GFP_KERNEL); + if (!work->tr_buf) + return rc; + + /* fill transform header */ + fill_transform_hdr(work->tr_buf, buf, work->conn->cipher_type); + + iov[0].iov_base = work->tr_buf; + iov[0].iov_len = sizeof(struct smb2_transform_hdr) + 4; + buf_size += iov[0].iov_len - 4; + + iov[1].iov_base = buf + 4; + iov[1].iov_len = get_rfc1002_len(buf); + if (work->aux_payload_sz) { + iov[1].iov_len = work->resp_hdr_sz - 4; + + iov[2].iov_base = work->aux_payload_buf; + iov[2].iov_len = work->aux_payload_sz; + buf_size += iov[2].iov_len; + } + buf_size += iov[1].iov_len; + work->resp_hdr_sz = iov[1].iov_len; + + rc = ksmbd_crypt_message(work, iov, rq_nvec, 1); + if (rc) + return rc; + + memmove(buf, iov[1].iov_base, iov[1].iov_len); + *(__be32 *)work->tr_buf = cpu_to_be32(buf_size); + + return rc; +} + +bool smb3_is_transform_hdr(void *buf) +{ + struct smb2_transform_hdr *trhdr = smb2_get_msg(buf); + + return trhdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM; +} + +int smb3_decrypt_req(struct ksmbd_work *work) +{ + struct ksmbd_session *sess; + char *buf = work->request_buf; + unsigned int pdu_length = get_rfc1002_len(buf); + struct kvec iov[2]; + int buf_data_size = pdu_length - sizeof(struct smb2_transform_hdr); + struct smb2_transform_hdr *tr_hdr = smb2_get_msg(buf); + int rc = 0; + + if (buf_data_size < sizeof(struct smb2_hdr)) { + pr_err("Transform message is too small (%u)\n", + pdu_length); + return -ECONNABORTED; + } + + if (buf_data_size < le32_to_cpu(tr_hdr->OriginalMessageSize)) { + pr_err("Transform message is broken\n"); + return -ECONNABORTED; + } + + sess = ksmbd_session_lookup_all(work->conn, le64_to_cpu(tr_hdr->SessionId)); + if (!sess) { + pr_err("invalid session id(%llx) in transform header\n", + le64_to_cpu(tr_hdr->SessionId)); + return -ECONNABORTED; + } + + iov[0].iov_base = buf; + iov[0].iov_len = sizeof(struct smb2_transform_hdr) + 4; + iov[1].iov_base = buf + sizeof(struct smb2_transform_hdr) + 4; + iov[1].iov_len = buf_data_size; + rc = ksmbd_crypt_message(work, iov, 2, 0); + if (rc) + return rc; + + memmove(buf + 4, iov[1].iov_base, buf_data_size); + *(__be32 *)buf = cpu_to_be32(buf_data_size); + + return rc; +} + +bool smb3_11_final_sess_setup_resp(struct ksmbd_work *work) +{ + struct ksmbd_conn *conn = work->conn; + struct ksmbd_session *sess = work->sess; + struct smb2_hdr *rsp = smb2_get_msg(work->response_buf); + + if (conn->dialect < SMB30_PROT_ID) + return false; + + if (work->next_smb2_rcv_hdr_off) + rsp = ksmbd_resp_buf_next(work); + + if (le16_to_cpu(rsp->Command) == SMB2_SESSION_SETUP_HE && + sess->user && !user_guest(sess->user) && + rsp->Status == STATUS_SUCCESS) + return true; + return false; +} |