This is a note to let you know that I've just added the patch titled
dm space map metadata: fix extending the space map
to the 3.12-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:
dm-space-map-metadata-fix-extending-the-space-map.patch
and it can be found in the queue-3.12 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 7e664b3dec431eebf0c5df5ff704d6197634cf35 Mon Sep 17 00:00:00 2001
From: Joe Thornber <ejt@xxxxxxxxxx>
Date: Tue, 7 Jan 2014 15:49:02 +0000
Subject: dm space map metadata: fix extending the space map
From: Joe Thornber <ejt@xxxxxxxxxx>
commit 7e664b3dec431eebf0c5df5ff704d6197634cf35 upstream.
When extending a metadata space map we should do the first commit whilst
still in bootstrap mode -- a mode where all blocks get allocated in the
new area.
That way the commit overhead is allocated from the newly added space.
Otherwise we risk running out of space.
With this fix, and the previous commit "dm space map common: make sure
new space is used during extend", the following device mapper testsuite
test passes:
dmtest run --suite thin-provisioning -n /resize_metadata_no_io/
Signed-off-by: Joe Thornber <ejt@xxxxxxxxxx>
Signed-off-by: Mike Snitzer <snitzer@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/md/persistent-data/dm-space-map-metadata.c | 18 +++++++++++++-----
1 file changed, 13 insertions(+), 5 deletions(-)
--- a/drivers/md/persistent-data/dm-space-map-metadata.c
+++ b/drivers/md/persistent-data/dm-space-map-metadata.c
@@ -608,20 +608,28 @@ static int sm_metadata_extend(struct dm_
* Flick into a mode where all blocks get allocated in the new area.
*/
smm->begin = old_len;
- memcpy(&smm->sm, &bootstrap_ops, sizeof(smm->sm));
+ memcpy(sm, &bootstrap_ops, sizeof(*sm));
/*
* Extend.
*/
r = sm_ll_extend(&smm->ll, extra_blocks);
+ if (r)
+ goto out;
+ for (i = old_len; !r && i < smm->begin; i++) {
+ r = sm_ll_inc(&smm->ll, i, &ev);
+ if (r)
+ goto out;
+ }
+
+ r = sm_metadata_commit(sm);
+
+out:
/*
* Switch back to normal behaviour.
*/
- memcpy(&smm->sm, &ops, sizeof(smm->sm));
- for (i = old_len; !r && i < smm->begin; i++)
- r = sm_ll_inc(&smm->ll, i, &ev);
-
+ memcpy(sm, &ops, sizeof(*sm));
return r;
}
Patches currently in stable-queue which might be from ejt@xxxxxxxxxx are
queue-3.12/dm-thin-fix-discard-support-to-a-previously-shared-block.patch
queue-3.12/dm-space-map-metadata-fix-extending-the-space-map.patch
queue-3.12/dm-space-map-common-make-sure-new-space-is-used-during-extend.patch
queue-3.12/dm-thin-initialize-dm_thin_new_mapping-returned-by-get_next_mapping.patch
queue-3.12/dm-space-map-metadata-fix-bug-in-resizing-of-thin-metadata.patch
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