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dm mpath: refactor pg_init

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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>
This commit is contained in:
Kiyoshi Ueda 2010-03-06 02:32:18 +00:00 committed by Alasdair G Kergon
parent 2bded7bd7e
commit fb61264297
1 changed files with 19 additions and 12 deletions
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31
drivers/md/dm-mpath.c
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@ -235,6 +235,21 @@ static void free_multipath(struct multipath *m)
* 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 work_struct *work)
{
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 work_struct *work)
(!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)