From a534c8d15b1f1d0f861fc2bb9e0529bd8486ec3f Mon Sep 17 00:00:00 2001 From: "Aneesh Kumar K.V" Date: Wed, 30 Jun 2010 19:18:50 +0530 Subject: fs/9p: Prevent parallel rename when doing fid_lookup During fid lookup we need to make sure that the dentry->d_parent doesn't change so that we can safely walk the parent dentries. To ensure that we need to prevent cross directory rename during fid_lookup. Add a per superblock rename_sem rw_semaphore to prevent parallel fid lookup and rename. Signed-off-by: Aneesh Kumar K.V Signed-off-by: Venkateswararao Jujjuri Signed-off-by: Eric Van Hensbergen --- fs/9p/vfs_super.c | 1 + 1 file changed, 1 insertion(+) (limited to 'fs/9p/vfs_super.c') diff --git a/fs/9p/vfs_super.c b/fs/9p/vfs_super.c index 0a2e2030c844..4b9ede0b41b7 100644 --- a/fs/9p/vfs_super.c +++ b/fs/9p/vfs_super.c @@ -287,4 +287,5 @@ struct file_system_type v9fs_fs_type = { .get_sb = v9fs_get_sb, .kill_sb = v9fs_kill_super, .owner = THIS_MODULE, + .fs_flags = FS_RENAME_DOES_D_MOVE, }; -- cgit v1.2.3