Patch "btrfs: cleanup orphans while looking up default subvolume" has been added to the 4.0-stable tree

Patch "btrfs: cleanup orphans while looking up default subvolume" has been added to the 4.0-stable tree

[gregkh]

This is a note to let you know that I've just added the patch titled

    btrfs: cleanup orphans while looking up default subvolume

to the 4.0-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     btrfs-cleanup-orphans-while-looking-up-default-subvolume.patch
and it can be found in the queue-4.0 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.


>From 727b9784b6085c99c2f836bf4fcc2848dc9cf904 Mon Sep 17 00:00:00 2001
From: Jeff Mahoney <jeffm@suse.com>
Date: Fri, 20 Mar 2015 14:02:09 -0400
Subject: btrfs: cleanup orphans while looking up default subvolume

From: Jeff Mahoney <jeffm@suse.com>

commit 727b9784b6085c99c2f836bf4fcc2848dc9cf904 upstream.

Orphans in the fs tree are cleaned up via open_ctree and subvolume
orphans are cleaned via btrfs_lookup_dentry -- except when a default
subvolume is in use.  The name for the default subvolume uses a manual
lookup that doesn't trigger orphan cleanup and needs to trigger it
manually as well. This doesn't apply to the remount case since the
subvolumes are cleaned up by walking the root radix tree.

Signed-off-by: Jeff Mahoney <jeffm@suse.com>
Reviewed-by: David Sterba <dsterba@suse.cz>
Signed-off-by: Chris Mason <clm@fb.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 fs/btrfs/super.c |    9 +++++++++
 1 file changed, 9 insertions(+)

--- a/fs/btrfs/super.c
+++ b/fs/btrfs/super.c
@@ -901,6 +901,15 @@ find_root:
 	if (IS_ERR(new_root))
 		return ERR_CAST(new_root);
 
+	if (!(sb->s_flags & MS_RDONLY)) {
+		int ret;
+		down_read(&fs_info->cleanup_work_sem);
+		ret = btrfs_orphan_cleanup(new_root);
+		up_read(&fs_info->cleanup_work_sem);
+		if (ret)
+			return ERR_PTR(ret);
+	}
+
 	dir_id = btrfs_root_dirid(&new_root->root_item);
 setup_root:
 	location.objectid = dir_id;


Patches currently in stable-queue which might be from jeffm@suse.com are

queue-4.0/btrfs-cleanup-orphans-while-looking-up-default-subvolume.patch
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