On Wed, 2011-11-02 at 04:56 +0000, Ben Hutchings wrote: > On Mon, 2011-10-31 at 14:35 +0100, Bernd Zeimetz wrote: > > Package: linux-2.6 > > Version: 2.6.32-38 > > > > Hi, > > > > removing paths to our SAN and adding them back results in > [...] > > Does the attached patch help? Instructions for building a patched > kernel can be found at: > > http://kernel-handbook.alioth.debian.org/ch-common-tasks.html#s-common-official Sorry, you'll need this patch as well. Ben. -- Ben Hutchings Sturgeon's Law: Ninety percent of everything is crap.
From: Mike Anderson <andmike@linux.vnet.ibm.com>
Date: Thu, 10 Dec 2009 23:52:20 +0000
Subject: [PATCH] dm: add dm_deleting_md function
commit 432a212c0dd0f4ca386cf37c5b740ac9dbda4479 upstream.
Add dm_deleting_md to check whether or not a given mapped
device is currently being deleted.
Signed-off-by: Mike Anderson <andmike@linux.vnet.ibm.com>
Signed-off-by: Alasdair G Kergon <agk@redhat.com>
---
drivers/md/dm.c | 9 +++++++--
drivers/md/dm.h | 5 +++++
2 files changed, 12 insertions(+), 2 deletions(-)
diff --git a/drivers/md/dm.c b/drivers/md/dm.c
index 233a2e9..16f759f 100644
--- a/drivers/md/dm.c
+++ b/drivers/md/dm.c
@@ -329,6 +329,11 @@ static void __exit dm_exit(void)
/*
* Block device functions
*/
+int dm_deleting_md(struct mapped_device *md)
+{
+ return test_bit(DMF_DELETING, &md->flags);
+}
+
static int dm_blk_open(struct block_device *bdev, fmode_t mode)
{
struct mapped_device *md;
@@ -340,7 +345,7 @@ static int dm_blk_open(struct block_device *bdev, fmode_t mode)
goto out;
if (test_bit(DMF_FREEING, &md->flags) ||
- test_bit(DMF_DELETING, &md->flags)) {
+ dm_deleting_md(md)) {
md = NULL;
goto out;
}
@@ -2659,7 +2664,7 @@ struct mapped_device *dm_get_from_kobject(struct kobject *kobj)
return NULL;
if (test_bit(DMF_FREEING, &md->flags) ||
- test_bit(DMF_DELETING, &md->flags))
+ dm_deleting_md(md))
return NULL;
dm_get(md);
diff --git a/drivers/md/dm.h b/drivers/md/dm.h
index 4a95e8f..604a5f2 100644
--- a/drivers/md/dm.h
+++ b/drivers/md/dm.h
@@ -89,6 +89,11 @@ int dm_target_iterate(void (*iter_func)(struct target_type *tt,
int dm_split_args(int *argc, char ***argvp, char *input);
/*
+ * Is this mapped_device being deleted?
+ */
+int dm_deleting_md(struct mapped_device *md);
+
+/*
* The device-mapper can be driven through one of two interfaces;
* ioctl or filesystem, depending which patch you have applied.
*/
--
1.7.7
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