From: Jeff Layton <jlayton@redhat.com>
Date: Mon, 17 Mar 2014 11:06:58 +0000 (-0400)
Subject: nfs: emit a fsnotify_nameremove call in sillyrename codepath
X-Git-Tag: v3.15-rc1~66^2~12^2~2
X-Git-Url: https://asedeno.scripts.mit.edu/gitweb/?a=commitdiff_plain;h=f7be728468263fcbaa1e9dcae83fb97a88b4127c;p=linux.git

nfs: emit a fsnotify_nameremove call in sillyrename codepath

If a file is sillyrenamed, then the generic vfs_unlink code will skip
emitting fsnotify events for it.

This patch has the sillyrename code do that instead.

In truth this is a little bit odd since we aren't actually removing the
dentry per-se, but renaming it. Still, this is probably the right thing
to do since it's what userland apps expect to see when an unlink()
occurs or some file is renamed on top of the dentry.

Signed-off-by: Jeff Layton <jlayton@redhat.com>
Tested-by: Anna Schumaker <Anna.Schumaker@netapp.com>
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
---

diff --git a/fs/nfs/unlink.c b/fs/nfs/unlink.c
index 818ded7b7b74..de54129336c6 100644
--- a/fs/nfs/unlink.c
+++ b/fs/nfs/unlink.c
@@ -14,6 +14,7 @@
 #include <linux/sched.h>
 #include <linux/wait.h>
 #include <linux/namei.h>
+#include <linux/fsnotify.h>
 
 #include "internal.h"
 #include "nfs4_fs.h"
@@ -465,8 +466,18 @@ nfs_async_rename(struct inode *old_dir, struct inode *new_dir,
 static void
 nfs_complete_sillyrename(struct rpc_task *task, struct nfs_renamedata *data)
 {
-	if (task->tk_status != 0)
-		nfs_cancel_async_unlink(data->old_dentry);
+	struct dentry *dentry = data->old_dentry;
+
+	if (task->tk_status != 0) {
+		nfs_cancel_async_unlink(dentry);
+		return;
+	}
+
+	/*
+	 * vfs_unlink and the like do not issue this when a file is
+	 * sillyrenamed, so do it here.
+	 */
+	fsnotify_nameremove(dentry, 0);
 }
 
 #define SILLYNAME_PREFIX ".nfs"