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vfs: make fchownat 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 14ff690c0f
commit 99a5df37a0
1 changed files with 5 additions and 0 deletions
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5
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; lookup_flags = (flag & AT_SYMLINK_NOFOLLOW) ? 0 : LOOKUP_FOLLOW;
if (flag & AT_EMPTY_PATH) if (flag & AT_EMPTY_PATH)
lookup_flags |= LOOKUP_EMPTY; lookup_flags |= LOOKUP_EMPTY;
retry:
error = user_path_at(dfd, filename, lookup_flags, &path); error = user_path_at(dfd, filename, lookup_flags, &path);
if (error) if (error)
goto out; goto out;
@ -592,6 +593,10 @@ SYSCALL_DEFINE5(fchownat, int, dfd, const char __user *, filename, uid_t, user,
mnt_drop_write(path.mnt); mnt_drop_write(path.mnt);
out_release: out_release:
path_put(&path); path_put(&path);
if (retry_estale(error, lookup_flags)) {
lookup_flags |= LOOKUP_REVAL;
goto retry;
}
out: out:
return error; return error;
} }