[PATCH v8 11/32] vfs: make do_unlinkat retry on ESTALE errors

[Jeff Layton <jlayton@redhat.com>]

Signed-off-by: Jeff Layton <jlayton@redhat.com>
---
 fs/namei.c | 12 ++++++++++--
 1 file changed, 10 insertions(+), 2 deletions(-)

diff --git a/fs/namei.c b/fs/namei.c
index 7c9bb50..467b9f1 100644
--- a/fs/namei.c
+++ b/fs/namei.c
@@ -3446,9 +3446,13 @@ static long do_unlinkat(int dfd, const char __user *pathname)
 	struct filename *name;
 	struct dentry *dentry;
 	struct nameidata nd;
-	struct inode *inode = NULL;
+	struct inode *inode;
+	unsigned int try = 0;
+	unsigned int lookup_flags = LOOKUP_PARENT;
 
-	name = user_path_parent(dfd, pathname, &nd, 0);
+retry:
+	inode = NULL;
+	name = user_path_parent(dfd, pathname, &nd, try);
 	if (IS_ERR(name))
 		return PTR_ERR(name);
 
@@ -3486,6 +3490,10 @@ exit2:
 exit1:
 	path_put(&nd.path);
 	putname(name);
+	if (retry_estale(error, try++)) {
+		lookup_flags |= LOOKUP_REVAL;
+		goto retry;
+	}
 	return error;
 
 slashes:
-- 
1.7.11.7