diff options
| author | Christoph Hellwig <hch@lst.de> | 2020-07-14 09:47:43 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2024-04-13 13:51:35 +0300 |
| commit | 8eba8d11459240e5a8132e4e50ae00a9a41954f4 (patch) | |
| tree | 21ea8f4f88087dadc71fd0776894fa915b5d7ba1 | |
| parent | 9550632ba9989ad55843129cb297d92e06e25cf2 (diff) | |
| download | linux-8eba8d11459240e5a8132e4e50ae00a9a41954f4.tar.xz | |
fs: add a vfs_fchown helper
[ Upstream commit c04011fe8cbd80af1be6e12b53193bf3846750d7 ]
Add a helper for struct file based chown operations. To be used by
the initramfs code soon.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Acked-by: Linus Torvalds <torvalds@linux-foundation.org>
Stable-dep-of: 4624b346cf67 ("init: open /initrd.image with O_LARGEFILE")
Signed-off-by: Sasha Levin <sashal@kernel.org>
| -rw-r--r-- | fs/open.c | 29 | ||||
| -rw-r--r-- | include/linux/fs.h | 2 |
2 files changed, 19 insertions, 12 deletions
diff --git a/fs/open.c b/fs/open.c index dcbd01611237..9213c15d8a8d 100644 --- a/fs/open.c +++ b/fs/open.c @@ -708,23 +708,28 @@ SYSCALL_DEFINE3(lchown, const char __user *, filename, uid_t, user, gid_t, group AT_SYMLINK_NOFOLLOW); } +int vfs_fchown(struct file *file, uid_t user, gid_t group) +{ + int error; + + error = mnt_want_write_file(file); + if (error) + return error; + audit_file(file); + error = chown_common(&file->f_path, user, group); + mnt_drop_write_file(file); + return error; +} + int ksys_fchown(unsigned int fd, uid_t user, gid_t group) { struct fd f = fdget(fd); int error = -EBADF; - if (!f.file) - goto out; - - error = mnt_want_write_file(f.file); - if (error) - goto out_fput; - audit_file(f.file); - error = chown_common(&f.file->f_path, user, group); - mnt_drop_write_file(f.file); -out_fput: - fdput(f); -out: + if (f.file) { + error = vfs_fchown(f.file, user, group); + fdput(f); + } return error; } diff --git a/include/linux/fs.h b/include/linux/fs.h index 272f261894b1..03de5c713456 100644 --- a/include/linux/fs.h +++ b/include/linux/fs.h @@ -1730,6 +1730,8 @@ int vfs_mkobj(struct dentry *, umode_t, int (*f)(struct dentry *, umode_t, void *), void *); +int vfs_fchown(struct file *file, uid_t user, gid_t group); + extern long vfs_ioctl(struct file *file, unsigned int cmd, unsigned long arg); #ifdef CONFIG_COMPAT |