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fs: add a vfs_fchmod helper

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Add a helper for struct file based chmode 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>
This commit is contained in:
Christoph Hellwig 2020-07-14 08:55:05 +02:00
parent c04011fe8c
commit 9e96c8c0e9
2 changed files with 8 additions and 2 deletions
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9
fs/open.c
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@ -602,14 +602,19 @@ static int chmod_common(const struct path *path, umode_t mode)
return error;
}
int vfs_fchmod(struct file *file, umode_t mode)
{
audit_file(file);
return chmod_common(&file->f_path, mode);
}
int ksys_fchmod(unsigned int fd, umode_t mode)
{
struct fd f = fdget(fd);
int err = -EBADF;
if (f.file) {
audit_file(f.file);
err = chmod_common(&f.file->f_path, mode);
err = vfs_fchmod(f.file, mode);
fdput(f);
}
return err;

1
include/linux/fs.h
View File

@ -1745,6 +1745,7 @@ int vfs_mkobj(struct dentry *, umode_t,
void *);
int vfs_fchown(struct file *file, uid_t user, gid_t group);
int vfs_fchmod(struct file *file, umode_t mode);
extern long vfs_ioctl(struct file *file, unsigned int cmd, unsigned long arg);