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authorHannes Reinecke <hare@suse.de>2008-07-18 04:49:02 +0400
committerJames Bottomley <James.Bottomley@HansenPartnership.com>2008-07-26 23:14:53 +0400
commitae11b1b36da726a8a93409b896704edc6b4f3402 (patch)
tree737e3602cb426c87f64ad26ccbfc12ce707d7b9e /drivers/md
parent057ea7c9683c3d684128cced796f03c179ecf1c2 (diff)
downloadlinux-ae11b1b36da726a8a93409b896704edc6b4f3402.tar.xz
[SCSI] scsi_dh: attach to hardware handler from dm-mpath
multipath keeps a separate device table which may be more current than the built-in one. So we should make sure to always call ->attach whenever a multipath map with hardware handler is instantiated. And we should call ->detach on removal, too. [sekharan: update as per comments from agk] Signed-off-by: Hannes Reinecke <hare@suse.de> Signed-off-by: Chandra Seetharaman <sekharan@us.ibm.com> Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
Diffstat (limited to 'drivers/md')
-rw-r--r--drivers/md/dm-mpath.c13
1 files changed, 13 insertions, 0 deletions
diff --git a/drivers/md/dm-mpath.c b/drivers/md/dm-mpath.c
index fea966d66f98..71dd65aa31b6 100644
--- a/drivers/md/dm-mpath.c
+++ b/drivers/md/dm-mpath.c
@@ -147,9 +147,12 @@ static struct priority_group *alloc_priority_group(void)
static void free_pgpaths(struct list_head *pgpaths, struct dm_target *ti)
{
struct pgpath *pgpath, *tmp;
+ struct multipath *m = ti->private;
list_for_each_entry_safe(pgpath, tmp, pgpaths, list) {
list_del(&pgpath->list);
+ if (m->hw_handler_name)
+ scsi_dh_detach(bdev_get_queue(pgpath->path.dev->bdev));
dm_put_device(ti, pgpath->path.dev);
free_pgpath(pgpath);
}
@@ -548,6 +551,7 @@ static struct pgpath *parse_path(struct arg_set *as, struct path_selector *ps,
{
int r;
struct pgpath *p;
+ struct multipath *m = ti->private;
/* we need at least a path arg */
if (as->argc < 1) {
@@ -566,6 +570,15 @@ static struct pgpath *parse_path(struct arg_set *as, struct path_selector *ps,
goto bad;
}
+ if (m->hw_handler_name) {
+ r = scsi_dh_attach(bdev_get_queue(p->path.dev->bdev),
+ m->hw_handler_name);
+ if (r < 0) {
+ dm_put_device(ti, p->path.dev);
+ goto bad;
+ }
+ }
+
r = ps->type->add_path(ps, &p->path, as->argc, as->argv, &ti->error);
if (r) {
dm_put_device(ti, p->path.dev);