NFS: Protect inode->i_nlink updates using inode->i_lock
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
diff --git a/fs/nfs/dir.c b/fs/nfs/dir.c
index b194066..d6ec1c8 100644
--- a/fs/nfs/dir.c
+++ b/fs/nfs/dir.c
@@ -870,6 +870,14 @@
}
+static void nfs_drop_nlink(struct inode *inode)
+{
+ spin_lock(&inode->i_lock);
+ if (inode->i_nlink > 0)
+ drop_nlink(inode);
+ spin_unlock(&inode->i_lock);
+}
+
/*
* Called when the dentry loses inode.
* We use it to clean up silly-renamed files.
@@ -1420,7 +1428,7 @@
error = NFS_PROTO(dir)->remove(dir, &dentry->d_name);
/* The VFS may want to delete this inode */
if (error == 0)
- drop_nlink(inode);
+ nfs_drop_nlink(inode);
nfs_mark_for_revalidate(inode);
} else
error = NFS_PROTO(dir)->remove(dir, &dentry->d_name);
@@ -1647,7 +1655,7 @@
/* dentry still busy? */
goto out;
} else
- drop_nlink(new_inode);
+ nfs_drop_nlink(new_inode);
go_ahead:
/*