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fs: move timespec validation into utimes_common 

Consolidate the validation of the timespec from the two callers into
utimes_common.  That means it is done a little later (e.g. after the
path lookup), but I can't find anything that requires a specific
order of processing the errors.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Acked-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Christoph Hellwig 2020-07-15 08:15:36 +02:00
parent 9d4b74aee8
commit 27eb11c963
1 changed files with 9 additions and 10 deletions
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19
fs/utimes.c
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@ -23,14 +23,19 @@ static int utimes_common(const struct path *path, struct timespec64 *times)
struct inode *inode = path->dentry->d_inode;
struct inode *delegated_inode = NULL;
if (times) {
if (!nsec_valid(times[0].tv_nsec) ||
!nsec_valid(times[1].tv_nsec))
return -EINVAL;
if (times[0].tv_nsec == UTIME_NOW &&
times[1].tv_nsec == UTIME_NOW)
times = NULL;
}
error = mnt_want_write(path->mnt);
if (error)
goto out;
if (times && times[0].tv_nsec == UTIME_NOW &&
times[1].tv_nsec == UTIME_NOW)
times = NULL;
newattrs.ia_valid = ATTR_CTIME | ATTR_MTIME | ATTR_ATIME;
if (times) {
if (times[0].tv_nsec == UTIME_OMIT)
@ -76,9 +81,6 @@ static int do_utimes_path(int dfd, const char __user *filename,
struct path path;
int lookup_flags = 0, error;
if (times &&
(!nsec_valid(times[0].tv_nsec) || !nsec_valid(times[1].tv_nsec)))
return -EINVAL;
if (flags & ~(AT_SYMLINK_NOFOLLOW | AT_EMPTY_PATH))
return -EINVAL;
@ -107,9 +109,6 @@ static int do_utimes_fd(int fd, struct timespec64 *times, int flags)
struct fd f;
int error;
if (times &&
(!nsec_valid(times[0].tv_nsec) || !nsec_valid(times[1].tv_nsec)))
return -EINVAL;
if (flags)
return -EINVAL;