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| author | Christoph Hellwig <hch@lst.de> | 2020-07-14 08:47:43 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2024-04-13 12:50:13 +0200 |
| commit | c2f18e9a7619e194e564cd159e830efe7ce7545f (patch) | |
| tree | 661fb8f0b57a1baca0271c60d8020b19bcac7ebb | |
| parent | a65f5dbf3249b9ca9c05a843d2a5bddad0b9adf6 (diff) | |
| download | linux-stable-c2f18e9a7619e194e564cd159e830efe7ce7545f.tar.gz linux-stable-c2f18e9a7619e194e564cd159e830efe7ce7545f.tar.bz2 linux-stable-c2f18e9a7619e194e564cd159e830efe7ce7545f.zip | |
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 76996f920ebf..e072e86003f5 100644 --- a/fs/open.c +++ b/fs/open.c @@ -707,23 +707,28 @@ 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 e2c87c056742..7d93d22ad106 100644 --- a/include/linux/fs.h +++ b/include/linux/fs.h @@ -1660,6 +1660,8 @@ 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); /* |