diff options
| author | Hyunchul Lee <hyc.lee@gmail.com> | 2021-05-26 18:59:06 +0900 |
|---|---|---|
| committer | Namjae Jeon <namjae.jeon@samsung.com> | 2021-05-26 19:13:54 +0900 |
| commit | a6a5fa77805b291afc90291a6ae705b1759b9735 (patch) | |
| tree | 861dcd20a4053c9277d5c3f2110a8ed6198a6f97 /fs/cifsd/vfs.c | |
| parent | fc2d1b58c4f2c7240093d738ca99cfcf7a8b3107 (diff) | |
| download | lwn-a6a5fa77805b291afc90291a6ae705b1759b9735.tar.gz lwn-a6a5fa77805b291afc90291a6ae705b1759b9735.zip | |
cifsd: lookup a file with LOOKUP_FOLLOW only if 'follow symlinks = yes'
Some vfs help functions lookup a file with
LOOKUP_FOLLOW regardless of the "follow symlinks"
option.
Signed-off-by: Hyunchul Lee <hyc.lee@gmail.com>
Signed-off-by: Namjae Jeon <namjae.jeon@samsung.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
Diffstat (limited to 'fs/cifsd/vfs.c')
| -rw-r--r-- | fs/cifsd/vfs.c | 24 |
1 files changed, 20 insertions, 4 deletions
diff --git a/fs/cifsd/vfs.c b/fs/cifsd/vfs.c index 355e1a5a893b..291953eff5fa 100644 --- a/fs/cifsd/vfs.c +++ b/fs/cifsd/vfs.c @@ -572,11 +572,16 @@ int ksmbd_vfs_remove_file(struct ksmbd_work *work, char *name) struct path path; struct dentry *dentry, *parent; int err; + int flags = 0; if (ksmbd_override_fsids(work)) return -ENOMEM; - err = kern_path(name, LOOKUP_FOLLOW, &path); + if (test_share_config_flag(work->tcon->share_conf, + KSMBD_SHARE_FLAG_FOLLOW_SYMLINKS)) + flags = LOOKUP_FOLLOW; + + err = kern_path(name, flags, &path); if (err) { ksmbd_debug(VFS, "can't get %s, err %d\n", name, err); ksmbd_revert_fsids(work); @@ -634,11 +639,16 @@ int ksmbd_vfs_link(struct ksmbd_work *work, const char *oldname, struct path oldpath, newpath; struct dentry *dentry; int err; + int flags = 0; if (ksmbd_override_fsids(work)) return -ENOMEM; - err = kern_path(oldname, LOOKUP_FOLLOW, &oldpath); + if (test_share_config_flag(work->tcon->share_conf, + KSMBD_SHARE_FLAG_FOLLOW_SYMLINKS)) + flags = LOOKUP_FOLLOW; + + err = kern_path(oldname, flags, &oldpath); if (err) { ksmbd_err("cannot get linux path for %s, err = %d\n", oldname, err); @@ -646,7 +656,7 @@ int ksmbd_vfs_link(struct ksmbd_work *work, const char *oldname, } dentry = kern_path_create(AT_FDCWD, newname, &newpath, - LOOKUP_FOLLOW | LOOKUP_REVAL); + flags | LOOKUP_REVAL); if (IS_ERR(dentry)) { err = PTR_ERR(dentry); ksmbd_err("path create err for %s, err %d\n", newname, err); @@ -749,6 +759,7 @@ int ksmbd_vfs_fp_rename(struct ksmbd_work *work, struct ksmbd_file *fp, struct dentry *src_dent, *trap_dent, *src_child; char *dst_name; int err; + int flags; dst_name = extract_last_component(newname); if (!dst_name) @@ -757,7 +768,12 @@ int ksmbd_vfs_fp_rename(struct ksmbd_work *work, struct ksmbd_file *fp, src_dent_parent = dget_parent(fp->filp->f_path.dentry); src_dent = fp->filp->f_path.dentry; - err = kern_path(newname, LOOKUP_FOLLOW | LOOKUP_DIRECTORY, &dst_path); + flags = LOOKUP_DIRECTORY; + if (test_share_config_flag(work->tcon->share_conf, + KSMBD_SHARE_FLAG_FOLLOW_SYMLINKS)) + flags |= LOOKUP_FOLLOW; + + err = kern_path(newname, flags, &dst_path); if (err) { ksmbd_debug(VFS, "Cannot get path for %s [%d]\n", newname, err); goto out; |