From: Kiyoshi Ueda <k-ueda@ct.jp.nec.com>
This patch pulls the pg_init path activation code out of
process_queued_ios() into a new function.
No functional change.
Signed-off-by: Kiyoshi Ueda <k-ueda@ct.jp.nec.com>
Signed-off-by: Jun'ichi Nomura <j-nomura@ce.jp.nec.com>
Signed-off-by: Alasdair G Kergon <agk@redhat.com>
---
drivers/md/dm-mpath.c | 31 +++++++++++++++++++------------
1 file changed, 19 insertions(+), 12 deletions(-)
Index: linux-2.6.33-rc8/drivers/md/dm-mpath.c
===================================================================
--- linux-2.6.33-rc8.orig/drivers/md/dm-mpath.c
+++ linux-2.6.33-rc8/drivers/md/dm-mpath.c
@@ -235,6 +235,21 @@ static void free_multipath(struct multip
* Path selection
*-----------------------------------------------*/
+static void __pg_init_all_paths(struct multipath *m)
+{
+ struct pgpath *pgpath;
+
+ m->pg_init_count++;
+ m->pg_init_required = 0;
+ list_for_each_entry(pgpath, &m->current_pg->pgpaths, list) {
+ /* Skip failed paths */
+ if (!pgpath->is_active)
+ continue;
+ if (queue_work(kmpath_handlerd, &pgpath->activate_path))
+ m->pg_init_in_progress++;
+ }
+}
+
static void __switch_pg(struct multipath *m, struct pgpath *pgpath)
{
m->current_pg = pgpath->pg;
@@ -439,7 +454,7 @@ static void process_queued_ios(struct wo
{
struct multipath *m =
container_of(work, struct multipath, process_queued_ios);
- struct pgpath *pgpath = NULL, *tmp;
+ struct pgpath *pgpath = NULL;
unsigned must_queue = 1;
unsigned long flags;
@@ -457,17 +472,9 @@ static void process_queued_ios(struct wo
(!pgpath && !m->queue_if_no_path))
must_queue = 0;
- if (m->pg_init_required && !m->pg_init_in_progress && pgpath) {
- m->pg_init_count++;
- m->pg_init_required = 0;
- list_for_each_entry(tmp, &pgpath->pg->pgpaths, list) {
- /* Skip failed paths */
- if (!tmp->is_active)
- continue;
- if (queue_work(kmpath_handlerd, &tmp->activate_path))
- m->pg_init_in_progress++;
- }
- }
+ if (m->pg_init_required && !m->pg_init_in_progress && pgpath)
+ __pg_init_all_paths(m);
+
out:
spin_unlock_irqrestore(&m->lock, flags);
if (!must_queue)