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vfs: make fchownat retry once on ESTALE errors

Signed-off-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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1 parent 14ff690 commit 99a5df37a03c99e57d0da4f847a515b658963fbb @jtlayton jtlayton committed with Al Viro Dec 11, 2012
Showing with 5 additions and 0 deletions.
  1. +5 −0 fs/open.c
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@@ -582,6 +582,7 @@ SYSCALL_DEFINE5(fchownat, int, dfd, const char __user *, filename, uid_t, user,
lookup_flags = (flag & AT_SYMLINK_NOFOLLOW) ? 0 : LOOKUP_FOLLOW;
if (flag & AT_EMPTY_PATH)
lookup_flags |= LOOKUP_EMPTY;
+retry:
error = user_path_at(dfd, filename, lookup_flags, &path);
if (error)
goto out;
@@ -592,6 +593,10 @@ SYSCALL_DEFINE5(fchownat, int, dfd, const char __user *, filename, uid_t, user,
mnt_drop_write(path.mnt);
out_release:
path_put(&path);
+ if (retry_estale(error, lookup_flags)) {
+ lookup_flags |= LOOKUP_REVAL;
+ goto retry;
+ }
out:
return error;
}

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