linux-kernel - [PATCH v7 31/49] vfs: make do_unlinkat retry on ESTALE errors

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Message-Id: <1349137018-21948-32-git-send-email-jlayton@redhat.com>
Date:	Mon,  1 Oct 2012 20:16:40 -0400
From:	Jeff Layton <jlayton@...hat.com>
To:	viro@...IV.linux.org.uk
Cc:	eparis@...hat.com, linux-fsdevel@...r.kernel.org,
	linux-kernel@...r.kernel.org, linux-audit@...hat.com
Subject: [PATCH v7 31/49] vfs: make do_unlinkat retry on ESTALE errors

Signed-off-by: Jeff Layton <jlayton@...hat.com>
---
 fs/namei.c | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/fs/namei.c b/fs/namei.c
index 0d0b1c0..f311ed1 100644
--- a/fs/namei.c
+++ b/fs/namei.c
@@ -3450,8 +3450,11 @@ static long do_unlinkat(int dfd, const char __user *pathname)
 	struct dentry *dentry;
 	struct nameidata nd;
 	struct inode *inode = NULL;
+	unsigned int try = 0;
+	unsigned int lookup_flags = LOOKUP_PARENT;
 
-	name = user_path_parent(dfd, pathname, &nd, 0);
+retry:
+	name = user_path_parent(dfd, pathname, &nd, try);
 	if (IS_ERR(name))
 		return PTR_ERR(name);
 
@@ -3489,6 +3492,10 @@ exit2:
 exit1:
 	path_put(&nd.path);
 	putname(name);
+	if (retry_estale(error, try++)) {
+		lookup_flags |= LOOKUP_REVAL;
+		goto retry;
+	}
 	return error;
 
 slashes:
-- 
1.7.11.4

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