[PATCH v1 RESEND 10/12] vfs: fix symlinkat to retry on ESTALE errors

[Jeff Layton <jlayton@redhat.com>]

Signed-off-by: Jeff Layton <jlayton@redhat.com>
---
 fs/namei.c |    6 +++++-
 1 files changed, 5 insertions(+), 1 deletions(-)

diff --git a/fs/namei.c b/fs/namei.c
index cee62f1..b5d28fe 100644
--- a/fs/namei.c
+++ b/fs/namei.c
@@ -2957,12 +2957,14 @@ SYSCALL_DEFINE3(symlinkat, const char __user *, oldname,
 	char *from;
 	struct dentry *dentry;
 	struct path path;
+	unsigned int try = 0;
 
 	from = getname(oldname);
 	if (IS_ERR(from))
 		return PTR_ERR(from);
 
-	dentry = user_path_create(newdfd, newname, &path, false, false);
+retry:
+	dentry = user_path_create(newdfd, newname, &path, false, try);
 	error = PTR_ERR(dentry);
 	if (IS_ERR(dentry))
 		goto out_putname;
@@ -2980,6 +2982,8 @@ out_dput:
 	dput(dentry);
 	mutex_unlock(&path.dentry->d_inode->i_mutex);
 	path_put(&path);
+	if (retry_estale(error, try++))
+		goto retry;
 out_putname:
 	putname(from);
 	return error;
-- 
1.7.7.6