[PATCH v7 49/49] vfs: make lremovexattr retry once on ESTALE error

Jeff Layton
2012-10-02T00:18:16Z

fs/xattr.c | 23 ++++++++++++++---------
1 file changed, 14 insertions(+), 9 deletions(-)

diff --git a/fs/xattr.c b/fs/xattr.c
index d29d5a4..1781875 100644
--- a/fs/xattr.c
+++ b/fs/xattr.c
@@ -665,16 +665,21 @@ SYSCALL_DEFINE2(lremovexattr, const char __user *, pathname,
{
struct path path;
int error;
+ unsigned int try = 0;
+ unsigned int lookup_flags = 0;

- error = user_lpath(pathname, &path);
- if (error)
- return error;
- error = mnt_want_write(path.mnt);
- if (!error) {
- error = removexattr(path.dentry, name);
- mnt_drop_write(path.mnt);
- }
- path_put(&path);
+ do {
+ error = user_path_at(AT_FDCWD, pathname, lookup_flags, &path);
+ if (error)
+ break;
+ error = mnt_want_write(path.mnt);
+ if (!error) {
+ error = removexattr(path.dentry, name);
+ mnt_drop_write(path.mnt);
+ }
+ path_put(&path);
+ lookup_flags |= LOOKUP_REVAL;
+ } while (retry_estale(error, try++));
return error;
}

--
1.7.11.4