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vfs: make fchmodat retry once on ESTALE errors

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Signed-off-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Jeff Layton 2012-12-11 12:10:13 -05:00 committed by Al Viro
parent 2771261ec5
commit 14ff690c0f
1 changed files with 7 additions and 2 deletions
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9
fs/open.c
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@ -514,11 +514,16 @@ SYSCALL_DEFINE3(fchmodat, int, dfd, const char __user *, filename, umode_t, mode
{
struct path path;
int error;
error = user_path_at(dfd, filename, LOOKUP_FOLLOW, &path);
unsigned int lookup_flags = LOOKUP_FOLLOW;
retry:
error = user_path_at(dfd, filename, lookup_flags, &path);
if (!error) {
error = chmod_common(&path, mode);
path_put(&path);
if (retry_estale(error, lookup_flags)) {
lookup_flags |= LOOKUP_REVAL;
goto retry;
}
}
return error;
}