diff options
| author | Christoph Hellwig <hch@lst.de> | 2020-07-14 08:47:43 +0200 |
|---|---|---|
| committer | Christoph Hellwig <hch@lst.de> | 2020-07-16 15:33:00 +0200 |
| commit | c04011fe8cbd80af1be6e12b53193bf3846750d7 (patch) | |
| tree | 7cf3bf49adc28ad5ff133986dee7f0e888bc16da | |
| parent | f8456690ba8eb18ea4714e68554e242a04f65cff (diff) | |
fs: add a vfs_fchown helper
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>
| -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 6cd48a61cda3..103c66309bee 100644 --- a/fs/open.c +++ b/fs/open.c @@ -740,23 +740,28 @@ 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 f5abba86107d..0ddd64ca0b45 100644 --- a/include/linux/fs.h +++ b/include/linux/fs.h @@ -1744,6 +1744,8 @@ 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 |