/*
* security/tomoyo/common.h
*
* Header file for TOMOYO.
*
* Copyright (C) 2005-2010 NTT DATA CORPORATION
*/
#ifndef _SECURITY_TOMOYO_COMMON_H
#define _SECURITY_TOMOYO_COMMON_H
#include <linux/ctype.h>
#include <linux/string.h>
#include <linux/mm.h>
#include <linux/file.h>
#include <linux/kmod.h>
#include <linux/fs.h>
#include <linux/sched.h>
#include <linux/namei.h>
#include <linux/mount.h>
#include <linux/list.h>
#include <linux/cred.h>
struct linux_binprm;
/********** Constants definitions. **********/
/*
* TOMOYO uses this hash only when appending a string into the string
* table. Frequency of appending strings is very low. So we don't need
* large (e.g. 64k) hash size. 256 will be sufficient.
*/
#define TOMOYO_HASH_BITS 8
#define TOMOYO_MAX_HASH (1u<<TOMOYO_HASH_BITS)
/*
* This is the max length of a token.
*
* A token consists of only ASCII printable characters.
* Non printable characters in a token is represented in \ooo style
* octal string. Thus, \ itself is represented as \\.
*/
#define TOMOYO_MAX_PATHNAME_LEN 4000
/* Profile number is an integer between 0 and 255. */
#define TOMOYO_MAX_PROFILES 256
/* Keywords for ACLs. */
#define TOMOYO_KEYWORD_ALIAS "alias "
#define TOMOYO_KEYWORD_ALLOW_READ "allow_read "
#define TOMOYO_KEYWORD_DELETE "delete "
#define TOMOYO_KEYWORD_DENY_REWRITE "deny_rewrite "
#define TOMOYO_KEYWORD_FILE_PATTERN "file_pattern "
#define TOMOYO_KEYWORD_INITIALIZE_DOMAIN "initialize_domain "
#define TOMOYO_KEYWORD_KEEP_DOMAIN "keep_domain "
#define TOMOYO_KEYWORD_NO_INITIALIZE_DOMAIN "no_initialize_domain "
#define TOMOYO_KEYWORD_NO_KEEP_DOMAIN "no_keep_domain "
#define TOMOYO_KEYWORD_PATH_GROUP "path_group "
#define TOMOYO_KEYWORD_SELECT "select "
#define TOMOYO_KEYWORD_USE_PROFILE "use_profile "
#define TOMOYO_KEYWORD_IGNORE_GLOBAL_ALLOW_READ "ignore_global_allow_read"
/* A domain definition starts with <kernel>. */
#define TOMOYO_ROOT_NAME "<kernel>"
#define TOMOYO_ROOT_NAME_LEN (sizeof(TOMOYO_ROOT_NAME) - 1)
/* Index numbers for Access Controls. */
enum tomoyo_mac_index {
TOMOYO_MAC_FOR_FILE, /* domain_policy.conf */
TOMOYO_MAX_ACCEPT_ENTRY,
TOMOYO_VERBOSE,
TOMOYO_MAX_CONTROL_INDEX
};
/* Index numbers for Access Controls. */
enum tomoyo_acl_entry_type_index {
TOMOYO_TYPE_PATH_ACL,
TOMOYO_TYPE_PATH2_ACL,
};
/* Index numbers for File Controls. */
/*
* TYPE_READ_WRITE_ACL is special. TYPE_READ_WRITE_ACL is automatically set
* if both TYPE_READ_ACL and TYPE_WRITE_ACL are set. Both TYPE_READ_ACL and
* TYPE_WRITE_ACL are automatically set if TYPE_READ_WRITE_ACL is set.
* TYPE_READ_WRITE_ACL is automatically cleared if either TYPE_READ_ACL or
* TYPE_WRITE_ACL is cleared. Both TYPE_READ_ACL and TYPE_WRITE_ACL are
* automatically cleared if TYPE_READ_WRITE_ACL is cleared.
*/
enum tomoyo_path_acl_index {
TOMOYO_TYPE_READ_WRITE,
TOMOYO_TYPE_EXECUTE,
TOMOYO_TYPE_READ,
TOMOYO_TYPE_WRITE,
TOMOYO_TYPE_CREATE,
TOMOYO_TYPE_UNLINK,
TOMOYO_TYPE_MKDIR,
TOMOYO_TYPE_RMDIR,
TOMOYO_TYPE_MKFIFO,
TOMOYO_TYPE_MKSOCK,
TOMOYO_TYPE_MKBLOCK,
TOMOYO_TYPE_MKCHAR,
TOMOYO_TYPE_TRUNCATE,
TOMOYO_TYPE_SYMLINK,
TOMOYO_TYPE_REWRITE,
TOMOYO_TYPE_IOCTL,
TOMOYO_TYPE_CHMOD,
TOMOYO_TYPE_CHOWN,
TOMOYO_TYPE_CHGRP,
TOMOYO_TYPE_CHROOT,
TOMOYO_TYPE_MOUNT,
TOMOYO_TYPE_UMOUNT,
TOMOYO_MAX_PATH_OPERATION
};
enum tomoyo_path2_acl_index {
TOMOYO_TYPE_LINK,
TOMOYO_TYPE_RENAME,
TOMOYO_TYPE_PIVOT_ROOT,
TOMOYO_MAX_PATH2_OPERATION
};
enum tomoyo_securityfs_interface_index {
TOMOYO_DOMAINPOLICY,
TOMOYO_EXCEPTIONPOLICY,
TOMOYO_DOMAIN_STATUS,
TOMOYO_PROCESS_STATUS,
TOMOYO_MEMINFO,
TOMOYO_SELFDOMAIN,
TOMOYO_VERSION,
TOMOYO_PROFILE,
TOMOYO_MANAGER
};
/********** Structure definitions. **********/
/*
* tomoyo_page_buffer is a structure which is used for holding a pathname
* obtained from "struct dentry" and "struct vfsmount" pair.
* As of now, it is 4096 bytes. If users complain that 4096 bytes is too small
* (because TOMOYO escapes non ASCII printable characters using \ooo format),
* we will make the buffer larger.
*/
struct tomoyo_page_buffer {
char buffer[4096];
};
/*
* tomoyo_path_info is a structure which is used for holding a string data
* used by TOMOYO.
* This structure has several fields for supporting pattern matching.
*
* (1) "name" is the '\0' terminated string data.
* (2) "hash" is full_name_hash(name, strlen(name)).
* This allows tomoyo_pathcmp() to compare by hash before actually compare
* using strcmp().
* (3) "const_len" is the length of the initial segment of "name" which
* consists entirely of non wildcard characters. In other words, the length
* which we can compare two strings using strncmp().
* (4) "is_dir" is a bool which is true if "name" ends with "/",
* false otherwise.
* TOMOYO distinguishes directory and non-directory. A directory ends with
* "/" and non-directory does not end with "/".
* (5) "is_patterned" is a bool which is true if "name" contains wildcard
* characters, false otherwise. This allows TOMOYO to use "hash" and
* strcmp() for string comparison if "is_patterned" is false.
*/
struct tomoyo_path_info {
const char *name;
u32 hash; /* = full_name_hash(name, strlen(name)) */
u16 const_len; /* = tomoyo_const_part_length(name) */
bool is_dir; /* = tomoyo_strendswith(name, "/") */
bool is_patterned; /* = tomoyo_path_contains_pattern(name) */
};
/*
* tomoyo_name_entry is a structure which is used for linking
* "struct tomoyo_path_info" into tomoyo_name_list .
*/
struct tomoyo_name_entry {
struct list_head list;
atomic_t users;
struct tomoyo_path_info entry;
};
/*
* tomoyo_path_info_with_data is a structure which is used for holding a
* pathname obtained from "struct dentry" and "struct vfsmount" pair.
*
* "struct tomoyo_path_info_with_data" consists of "struct tomoyo_path_info"
* and buffer for the pathname, while "struct tomoyo_page_buffer" consists of
* buffer for the pathname only.
*
* "struct tomoyo_path_info_with_data" is intended to allow TOMOYO to release
* both "struct tomoyo_path_info" and buffer for the pathname by single kfree()
* so that we don't need to return two pointers to the caller. If the caller
* puts "struct tomoyo_path_info" on stack memory, we will be able to remove
* "struct tomoyo_path_info_with_data".
*/
struct tomoyo_path_info_with_data {
/* Keep "head" first, for this pointer is passed to kfree(). */
struct tomoyo_path_info head;
char barrier1[16]; /* Safeguard for overrun. */
char body[TOMOYO_MAX_PATHNAME_LEN];
char barrier2[16]; /* Safeguard for overrun. */
};
struct tomoyo_name_union {
const struct tomoyo_path_info *filename;
struct tomoyo_path_group *group;
u8 is_group;
};
/* Structure for "path_group" directive. */
struct tomoyo_path_group {
struct list_head list;
const struct tomoyo_path_info *group_name;
struct list_head member_list;
atomic_t users;
};
/* Structure for "path_group" directive. */
struct tomoyo_path_group_member {
struct list_head list;
bool is_deleted;
const struct tomoyo_path_info *member_name;
};
/*
* tomoyo_acl_info is a structure which is used for holding
*
* (1) "list" which is linked to the ->acl_info_list of
* "struct tomoyo_domain_info"
* (2) "type" which tells type of the entry (either
* "struct tomoyo_path_acl" or "struct tomoyo_path2_acl").
*
* Packing "struct tomoyo_acl_info" allows
* "struct tomoyo_path_acl" to embed "u8" + "u16" and
* "struct tomoyo_path2_acl" to embed "u8"
* without enlarging their structure size.
*/
struct tomoyo_acl_info {
struct list_head list;
u8 type;
} __packed;
/*
* tomoyo_domain_info is a structure which is used for holding permissions
* (e.g. "allow_read /lib/libc-2.5.so") given to each domain.
* It has following fields.
*
* (1) "list" which is linked to tomoyo_domain_list .
* (2) "acl_info_list" which is linked to "struct tomoyo_acl_info".
* (3) "domainname" which holds the name of the domain.
* (4) "profile" which remembers profile number assigned to this domain.
* (5) "is_deleted" is a bool which is true if this domain is marked as
* "deleted", false otherwise.
* (6) "quota_warned" is a bool which is used for suppressing warning message
* when learning mode learned too much entries.
* (7) "ignore_global_allow_read" is a bool which is true if this domain
* should ignore "allow_read" directive in exception policy.
* (8) "transition_failed" is a bool which is set to true when this domain was
* unable to create a new domain at tomoyo_find_next_domain() because the
* name of the domain to be created was too long or it could not allocate
* memory. If set to true, more than one process continued execve()
* without domain transition.
* (9) "users" is an atomic_t that holds how many "struct cred"->security
* are referring this "struct tomoyo_domain_info". If is_deleted == true
* and users == 0, this struct will be kfree()d upon next garbage
* collection.
*
* A domain's lifecycle is an analogy of files on / directory.
* Multiple domains with the same domainname cannot be created (as with
* creating files with the same filename fails with -EEXIST).
* If a process reached a domain, that process can reside in that domain after
* that domain is marked as "deleted" (as with a process can access an already
* open()ed file after that file was unlink()ed).
*/
struct tomoyo_domain_info {
struct list_head list;
struct list_head acl_info_list;
/* Name of this domain. Never NULL. */
const struct tomoyo_path_info *domainname;
u8 profile; /* Profile number to use. */
bool is_deleted; /* Delete flag. */
bool quota_warned; /* Quota warnning flag. */
bool ignore_global_allow_read; /* Ignore "allow_read" flag. */
bool transition_failed; /* Domain transition failed flag. */
atomic_t users; /* Number of referring credentials. */
};
/*
* tomoyo_path_acl is a structure which is used for holding an
* entry with one pathname operation (e.g. open(), mkdir()).
* It has following fields.
*
* (1) "head" which is a "struct tomoyo_acl_info".
* (2) "perm" which is a bitmask of permitted operations.
* (3) "name" is the pathname.
*
* Directives held by this structure are "allow_read/write", "allow_execute",
* "allow_read", "allow_write", "allow_create", "allow_unlink", "allow_mkdir",
* "allow_rmdir", "allow_mkfifo", "allow_mksock", "allow_mkblock",
* "allow_mkchar", "allow_truncate", "allow_symlink", "allow_rewrite",
* "allow_chmod", "allow_chown", "allow_chgrp", "allow_chroot", "allow_mount"
* and "allow_unmount".
*/
struct tomoyo_path_acl {
struct tomoyo_acl_info head; /* type = TOMOYO_TYPE_PATH_ACL */
u8 perm_high;
u16 perm;
struct tomoyo_name_union name;
};
/*
* tomoyo_path2_acl is a structure which is used for holding an
* entry with two pathnames operation (i.e. link(), rename() and pivot_root()).
* It has following fields.
*
* (1) "head" which is a "struct tomoyo_acl_info".
* (2) "perm" which is a bitmask of permitted operations.
* (3) "name1" is the source/old pathname.
* (4) "name2" is the destination/new pathname.
*
* Directives held by this structure are "allow_rename", "allow_link" and
* "allow_pivot_root".
*/
struct tomoyo_path2_acl {
struct tomoyo_acl_info head; /* type = TOMOYO_TYPE_PATH2_ACL */
u8 perm;
struct tomoyo_name_union name1;
struct tomoyo_name_union name2;
};
/*
* tomoyo_io_buffer is a structure which is used for reading and modifying
* configuration via /sys/kernel/security/tomoyo/ interface.
* It has many fields. ->read_var1 , ->read_var2 , ->write_var1 are used as
* cursors.
*
* Since the content of /sys/kernel/security/tomoyo/domain_policy is a list of
* "struct tomoyo_domain_info" entries and each "struct tomoyo_domain_info"
* entry has a list of "struct tomoyo_acl_info", we need two cursors when
* reading (one is for traversing tomoyo_domain_list and the other is for
* traversing "struct tomoyo_acl_info"->acl_info_list ).
*
* If a line written to /sys/kernel/security/tomoyo/domain_policy starts with
* "select ", TOMOYO seeks the cursor ->read_var1 and ->write_var1 to the
* domain with the domainname specified by the rest of that line (NULL is set
* if seek failed).
* If a line written to /sys/kernel/security/tomoyo/domain_policy starts with
* "delete ", TOMOYO deletes an entry or a domain specified by the rest of that
* line (->write_var1 is set to NULL if a domain was deleted).
* If a line written to /sys/kernel/security/tomoyo/domain_policy starts with
* neither "select " nor "delete ", an entry or a domain specified by that line
* is appended.
*/
struct tomoyo_io_buffer {
int (*read) (struct tomoyo_io_buffer *);
int (*write) (struct tomoyo_io_buffer *);
/* Exclusive lock for this structure. */
struct mutex io_sem;
/* Index returned by tomoyo_read_lock(). */
int reader_idx;
/* The position currently reading from. */
struct list_head *read_var1;
/* Extra variables for reading. */
struct list_head *read_var2;
/* The position currently writing to. */
struct tomoyo_domain_info *write_var1;
/* The step for reading. */
int read_step;
/* Buffer for reading. */
char *read_buf;
/* EOF flag for reading. */
bool read_eof;
/* Read domain ACL of specified PID? */
bool read_single_domain;
/* Extra variable for reading. */
u8 read_bit;
/* Bytes available for reading. */
int read_avail;
/* Size of read buffer. */
int readbuf_size;
/* Buffer for writing. */
char *write_buf;
/* Bytes available for writing. */
int write_avail;
/* Size of write buffer. */
int writebuf_size;
};
/*
* tomoyo_globally_readable_file_entry is a structure which is used for holding
* "allow_read" entries.
* It has following fields.
*
* (1) "list" which is linked to tomoyo_globally_readable_list .
* (2) "filename" is a pathname which is allowed to open(O_RDONLY).
* (3) "is_deleted" is a bool which is true if marked as deleted, false
* otherwise.
*/
struct tomoyo_globally_readable_file_entry {
struct list_head list;
const struct tomoyo_path_info *filename;
bool is_deleted;
};
/*
* tomoyo_pattern_entry is a structure which is used for holding
* "tomoyo_pattern_list" entries.
* It has following fields.
*
* (1) "list" which is linked to tomoyo_pattern_list .
* (2) "pattern" is a pathname pattern which is used for converting pathnames
* to pathname patterns during learning mode.
* (3) "is_deleted" is a bool which is true if marked as deleted, false
* otherwise.
*/
struct tomoyo_pattern_entry {
struct list_head list;
const struct tomoyo_path_info *pattern;
bool is_deleted;
};
/*
* tomoyo_no_rewrite_entry is a structure which is used for holding
* "deny_rewrite" entries.
* It has following fields.
*
* (1) "list" which is linked to tomoyo_no_rewrite_list .
* (2) "pattern" is a pathname which is by default not permitted to modify
* already existing content.
* (3) "is_deleted" is a bool which is true if marked as deleted, false
* otherwise.
*/
struct tomoyo_no_rewrite_entry {
struct list_head list;
const struct tomoyo_path_info *pattern;
bool is_deleted;
};
/*
* tomoyo_domain_initializer_entry is a structure which is used for holding
* "initialize_domain" and "no_initialize_domain" entries.
* It has following fields.
*
* (1) "list" which is linked to tomoyo_domain_initializer_list .
* (2) "domainname" which is "a domainname" or "the last component of a
* domainname". This field is NULL if "from" clause is not specified.
* (3) "program" which is a program's pathname.
* (4) "is_deleted" is a bool which is true if marked as deleted, false
* otherwise.
* (5) "is_not" is a bool which is true if "no_initialize_domain", false
* otherwise.
* (6) "is_last_name" is a bool which is true if "domainname" is "the last
* component of a domainname", false otherwise.
*/
struct tomoyo_domain_initializer_entry {
struct list_head list;
const struct tomoyo_path_info *domainname; /* This may be NULL */
const struct tomoyo_path_info *program;
bool is_deleted;
bool is_not; /* True if this entry is "no_initialize_domain". */
/* True if the domainname is tomoyo_get_last_name(). */
bool is_last_name;
};
/*
* tomoyo_domain_keeper_entry is a structure which is used for holding
* "keep_domain" and "no_keep_domain" entries.
* It has following fields.
*
* (1) "list" which is linked to tomoyo_domain_keeper_list .
* (2) "domainname" which is "a domainname" or "the last component of a
* domainname".
* (3) "program" which is a program's pathname.
* This field is NULL if "from" clause is not specified.
* (4) "is_deleted" is a bool which is true if marked as deleted, false
* otherwise.
* (5) "is_not" is a bool which is true if "no_initialize_domain", false
* otherwise.
* (6) "is_last_name" is a bool which is true if "domainname" is "the last
* component of a domainname", false otherwise.
*/
struct tomoyo_domain_keeper_entry {
struct list_head list;
const struct tomoyo_path_info *domainname;
const struct tomoyo_path_info *program; /* This may be NULL */
bool is_deleted;
bool is_not; /* True if this entry is "no_keep_domain". */
/* True if the domainname is tomoyo_get_last_name(). */
bool is_last_name;
};
/*
* tomoyo_alias_entry is a structure which is used for holding "alias" entries.
* It has following fields.
*
* (1) "list" which is linked to tomoyo_alias_list .
* (2) "original_name" which is a dereferenced pathname.
* (3) "aliased_name" which is a symlink's pathname.
* (4) "is_deleted" is a bool which is true if marked as deleted, false
* otherwise.
*/
struct tomoyo_alias_entry {
struct list_head list;
const struct tomoyo_path_info *original_name;
const struct tomoyo_path_info *aliased_name;
bool is_deleted;
};
/*
* tomoyo_policy_manager_entry is a structure which is used for holding list of
* domainnames or programs which are permitted to modify configuration via
* /sys/kernel/security/tomoyo/ interface.
* It has following fields.
*
* (1) "list" which is linked to tomoyo_policy_manager_list .
* (2) "manager" is a domainname or a program's pathname.
* (3) "is_domain" is a bool which is true if "manager" is a domainname, false
* otherwise.
* (4) "is_deleted" is a bool which is true if marked as deleted, false
* otherwise.
*/
struct tomoyo_policy_manager_entry {
struct list_head list;
/* A path to program or a domainname. */
const struct tomoyo_path_info *manager;
bool is_domain; /* True if manager is a domainname. */
bool is_deleted; /* True if this entry is deleted. */
};
/********** Function prototypes. **********/
/* Check whether the given name matches the given name_union. */
bool tomoyo_compare_name_union(const struct tomoyo_path_info *name,
const struct tomoyo_name_union *ptr);
/* Check whether the domain has too many ACL entries to hold. */
bool tomoyo_domain_quota_is_ok(struct tomoyo_domain_info * const domain);
/* Transactional sprintf() for policy dump. */
bool tomoyo_io_printf(struct tomoyo_io_buffer *head, const char *fmt, ...)
__attribute__ ((format(printf, 2, 3)));
/* Check whether the domainname is correct. */
bool tomoyo_is_correct_domain(const unsigned char *domainname);
/* Check whether the token is correct. */
bool tomoyo_is_correct_path(const char *filename, const s8 start_type,
const s8 pattern_type, const s8 end_type);
/* Check whether the token can be a domainname. */
bool tomoyo_is_domain_def(const unsigned char *buffer);
bool tomoyo_parse_name_union(const char *filename,
struct tomoyo_name_union *ptr);
/* Check whether the given filename matches the given path_group. */
bool tomoyo_path_matches_group(const struct tomoyo_path_info *pathname,
const struct tomoyo_path_group *group,
const bool may_use_pattern);
/* Check whether the given filename matches the given pattern. */
bool tomoyo_path_matches_pattern(const struct tomoyo_path_info *filename,
const struct tomoyo_path_info *pattern);
/* Read "alias" entry in exception policy. */
bool tomoyo_read_alias_policy(struct tomoyo_io_buffer *head);
/*
* Read "initialize_domain" and "no_initialize_domain" entry
* in exception policy.
*/
bool tomoyo_read_domain_initializer_policy(struct tomoyo_io_buffer *head);
/* Read "keep_domain" and "no_keep_domain" entry in exception policy. */
bool tomoyo_read_domain_keeper_policy(struct tomoyo_io_buffer *head);
/* Read "file_pattern" entry in exception policy. */
bool tomoyo_read_file_pattern(struct tomoyo_io_buffer *head);
/* Read "path_group" entry in exception policy. */
bool tomoyo_read_path_group_policy(struct tomoyo_io_buffer *head);
/* Read "allow_read" entry in exception policy. */
bool tomoyo_read_globally_readable_policy(struct tomoyo_io_buffer *head);
/* Read "deny_rewrite" entry in exception policy. */
bool tomoyo_read_no_rewrite_policy(struct tomoyo_io_buffer *head);
/* Tokenize a line. */
bool tomoyo_tokenize(char *buffer, char *w[], size_t size);
/* Write domain policy violation warning message to console? */
bool tomoyo_verbose_mode(const struct tomoyo_domain_info *domain);
/* Convert double path operation to operation name. */
const char *tomoyo_path22keyword(const u8 operation);
/* Get the last component of the given domainname. */
const char *tomoyo_get_last_name(const struct tomoyo_domain_info *domain);
/* Get warning message. */
const char *tomoyo_get_msg(const bool is_enforce);
/* Convert single path operation to operation name. */
const char *tomoyo_path2keyword(const u8 operation);
/* Create "alias" entry in exception policy. */
int tomoyo_write_alias_policy(char *data, const bool is_delete);
/*
* Create "initialize_domain" and "no_initialize_domain" entry
* in exception policy.
*/
int tomoyo_write_domain_initializer_policy(char *data, const bool is_not,
const bool is_delete);
/* Create "keep_domain" and "no_keep_domain" entry in exception policy. */
int tomoyo_write_domain_keeper_policy(char *data, const bool is_not,
const bool is_delete);
/*
* Create "allow_read/write", "allow_execute", "allow_read", "allow_write",
* "allow_create", "allow_unlink", "allow_mkdir", "allow_rmdir",
* "allow_mkfifo", "allow_mksock", "allow_mkblock", "allow_mkchar",
* "allow_truncate", "allow_symlink", "allow_rewrite", "allow_rename" and
* "allow_link" entry in domain policy.
*/
int tomoyo_write_file_policy(char *data, struct tomoyo_domain_info *domain,
const bool is_delete);
/* Create "allow_read" entry in exception policy. */
int tomoyo_write_globally_readable_policy(char *data, const bool is_delete);
/* Create "deny_rewrite" entry in exception policy. */
int tomoyo_write_no_rewrite_policy(char *data, const bool is_delete);
/* Create "file_pattern" entry in exception policy. */
int tomoyo_write_pattern_policy(char *data, const bool is_delete);
/* Create "path_group" entry in exception policy. */
int tomoyo_write_path_group_policy(char *data, const bool is_delete);
/* Find a domain by the given name. */
struct tomoyo_domain_info *tomoyo_find_domain(const char *domainname);
/* Find or create a domain by the given name. */
struct tomoyo_domain_info *tomoyo_find_or_assign_new_domain(const char *
domainname,
const u8 profile);
/* Allocate memory for "struct tomoyo_path_group". */
struct tomoyo_path_group *tomoyo_get_path_group(const char *group_name);
/* Check mode for specified functionality. */
unsigned int tomoyo_check_flags(const struct tomoyo_domain_info *domain,
const u8 index);
/* Fill in "struct tomoyo_path_info" members. */
void tomoyo_fill_path_info(struct tomoyo_path_info *ptr);
/* Run policy loader when /sbin/init starts. */
void tomoyo_load_policy(const char *filename);
/* Convert binary string to ascii string. */
int tomoyo_encode(char *buffer, int buflen, const char *str);
/* Returns realpath(3) of the given pathname but ignores chroot'ed root. */
int tomoyo_realpath_from_path2(struct path *path, char *newname,
int newname_len);
/*
* Returns realpath(3) of the given pathname but ignores chroot'ed root.
* These functions use kzalloc(), so the caller must call kfree()
* if these functions didn't return NULL.
*/
char *tomoyo_realpath(const char *pathname);
/*
* Same with tomoyo_realpath() except that it doesn't follow the final symlink.
*/
char *tomoyo_realpath_nofollow(const char *pathname);
/* Same with tomoyo_realpath() except that the pathname is already solved. */
char *tomoyo_realpath_from_path(struct path *path);
/* Check memory quota. */
bool tomoyo_memory_ok(void *ptr);
void *tomoyo_commit_ok(void *data, const unsigned int size);
/*
* Keep the given name on the RAM.
* The RAM is shared, so NEVER try to modify or kfree() the returned name.
*/
const struct tomoyo_path_info *tomoyo_get_name(const char *name);
/* Check for memory usage. */
int tomoyo_read_memory_counter(struct tomoyo_io_buffer *head);
/* Set memory quota. */
int tomoyo_write_memory_quota(struct tomoyo_io_buffer *head);
/* Initialize realpath related code. */
void __init tomoyo_realpath_init(void);
int tomoyo_check_exec_perm(struct tomoyo_domain_info *domain,
const struct tomoyo_path_info *filename);
int tomoyo_check_open_permission(struct tomoyo_domain_info *domain,
struct path *path, const int flag);
int tomoyo_path_perm(const u8 operation, struct path *path);
int tomoyo_path2_perm(const u8 operation, struct path *path1,
struct path *path2);
int tomoyo_check_rewrite_permission(struct file *filp);
int tomoyo_find_next_domain(struct linux_binprm *bprm);
/* Drop refcount on tomoyo_name_union. */
void tomoyo_put_name_union(struct tomoyo_name_union *ptr);
/* Run garbage collector. */
void tomoyo_run_gc(void);
void tomoyo_memory_free(void *ptr);
/********** External variable definitions. **********/
/* Lock for GC. */
extern struct srcu_struct tomoyo_ss;
/* The list for "struct tomoyo_domain_info". */
extern struct list_head tomoyo_domain_list;
extern struct list_head tomoyo_path_group_list;
extern struct list_head tomoyo_domain_initializer_list;
extern struct list_head tomoyo_domain_keeper_list;
extern struct list_head tomoyo_alias_list;
extern struct list_head tomoyo_globally_readable_list;
extern struct list_head tomoyo_pattern_list;
extern struct list_head tomoyo_no_rewrite_list;
extern struct list_head tomoyo_policy_manager_list;
extern struct list_head tomoyo_name_list[TOMOYO_MAX_HASH];
/* Lock for protecting policy. */
extern struct mutex tomoyo_policy_lock;
/* Has /sbin/init started? */
extern bool tomoyo_policy_loaded;
/* The kernel's domain. */
extern struct tomoyo_domain_info tomoyo_kernel_domain;
/********** Inlined functions. **********/
static inline int tomoyo_read_lock(void)
{
return srcu_read_lock(&tomoyo_ss);
}
static inline void tomoyo_read_unlock(int idx)
{
srcu_read_unlock(&tomoyo_ss, idx);
}
/* strcmp() for "struct tomoyo_path_info" structure. */
static inline bool tomoyo_pathcmp(const struct tomoyo_path_info *a,
const struct tomoyo_path_info *b)
{
return a->hash != b->hash || strcmp(a->name, b->name);
}
/**
* tomoyo_is_valid - Check whether the character is a valid char.
*
* @c: The character to check.
*
* Returns true if @c is a valid character, false otherwise.
*/
static inline bool tomoyo_is_valid(const unsigned char c)
{
return c > ' ' && c < 127;
}
/**
* tomoyo_is_invalid - Check whether the character is an invalid char.
*
* @c: The character to check.
*
* Returns true if @c is an invalid character, false otherwise.
*/
static inline bool tomoyo_is_invalid(const unsigned char c)
{
return c && (c <= ' ' || c >= 127);
}
static inline void tomoyo_put_name(const struct tomoyo_path_info *name)
{
if (name) {
struct tomoyo_name_entry *ptr =
container_of(name, struct tomoyo_name_entry, entry);
atomic_dec(&ptr->users);
}
}
static inline void tomoyo_put_path_group(struct tomoyo_path_group *group)
{
if (group)
atomic_dec(&group->users);
}
static inline struct tomoyo_domain_info *tomoyo_domain(void)
{
return current_cred()->security;
}
static inline struct tomoyo_domain_info *tomoyo_real_domain(struct task_struct
*task)
{
return task_cred_xxx(task, security);
}
static inline bool tomoyo_is_same_acl_head(const struct tomoyo_acl_info *p1,
const struct tomoyo_acl_info *p2)
{
return p1->type == p2->type;
}
static inline bool tomoyo_is_same_name_union
(const struct tomoyo_name_union *p1, const struct tomoyo_name_union *p2)
{
return p1->filename == p2->filename && p1->group == p2->group &&
p1->is_group == p2->is_group;
}
static inline bool tomoyo_is_same_path_acl(const struct tomoyo_path_acl *p1,
const struct tomoyo_path_acl *p2)
{
return tomoyo_is_same_acl_head(&p1->head, &p2->head) &&
tomoyo_is_same_name_union(&p1->name, &p2->name);
}
static inline bool tomoyo_is_same_path2_acl(const struct tomoyo_path2_acl *p1,
const struct tomoyo_path2_acl *p2)
{
return tomoyo_is_same_acl_head(&p1->head, &p2->head) &&
tomoyo_is_same_name_union(&p1->name1, &p2->name1) &&
tomoyo_is_same_name_union(&p1->name2, &p2->name2);
}
static inline bool tomoyo_is_same_domain_initializer_entry
(const struct tomoyo_domain_initializer_entry *p1,
const struct tomoyo_domain_initializer_entry *p2)
{
return p1->is_not == p2->is_not && p1->is_last_name == p2->is_last_name
&& p1->domainname == p2->domainname
&& p1->program == p2->program;
}
static inline bool tomoyo_is_same_domain_keeper_entry
(const struct tomoyo_domain_keeper_entry *p1,
const struct tomoyo_domain_keeper_entry *p2)
{
return p1->is_not == p2->is_not && p1->is_last_name == p2->is_last_name
&& p1->domainname == p2->domainname
&& p1->program == p2->program;
}
static inline bool tomoyo_is_same_alias_entry
(const struct tomoyo_alias_entry *p1, const struct tomoyo_alias_entry *p2)
{
return p1->original_name == p2->original_name &&
p1->aliased_name == p2->aliased_name;
}
/**
* list_for_each_cookie - iterate over a list with cookie.
* @pos: the &struct list_head to use as a loop cursor.
* @cookie: the &struct list_head to use as a cookie.
* @head: the head for your list.
*
* Same with list_for_each_rcu() except that this primitive uses @cookie
* so that we can continue iteration.
* @cookie must be NULL when iteration starts, and @cookie will become
* NULL when iteration finishes.
*/
#define list_for_each_cookie(pos, cookie, head) \
for (({ if (!cookie) \
cookie = head; }), \
pos = rcu_dereference((cookie)->next); \
prefetch(pos->next), pos != (head) || ((cookie) = NULL); \
(cookie) = pos, pos = rcu_dereference(pos->next))
#endif /* !defined(_SECURITY_TOMOYO_COMMON_H) */
