#define NR_RESERVED_BUFS 32
-static mdk_personality_t multipath_personality;
-
-
-static void *mp_pool_alloc(gfp_t gfp_flags, void *data)
-{
- struct multipath_bh *mpb;
- mpb = kmalloc(sizeof(*mpb), gfp_flags);
- if (mpb)
- memset(mpb, 0, sizeof(*mpb));
- return mpb;
-}
-
-static void mp_pool_free(void *mpb, void *data)
-{
- kfree(mpb);
-}
-
static int multipath_map (multipath_conf_t *conf)
{
int i, disks = conf->raid_disks;
rcu_read_unlock();
return ret;
}
+static int multipath_congested(void *data, int bits)
+{
+ mddev_t *mddev = data;
+ multipath_conf_t *conf = mddev_to_conf(mddev);
+ int i, ret = 0;
+
+ rcu_read_lock();
+ for (i = 0; i < mddev->raid_disks ; i++) {
+ mdk_rdev_t *rdev = rcu_dereference(conf->multipaths[i].rdev);
+ if (rdev && !test_bit(Faulty, &rdev->flags)) {
+ request_queue_t *q = bdev_get_queue(rdev->bdev);
+
+ ret |= bdi_congested(&q->backing_dev_info, bits);
+ /* Just like multipath_map, we just check the
+ * first available device
+ */
+ break;
+ }
+ }
+ rcu_read_unlock();
+ return ret;
+}
/*
* Careful, this can execute in IRQ contexts as well!
char b[BDEVNAME_SIZE];
clear_bit(In_sync, &rdev->flags);
set_bit(Faulty, &rdev->flags);
- mddev->sb_dirty = 1;
+ set_bit(MD_CHANGE_DEVS, &mddev->flags);
conf->working_disks--;
printk(KERN_ALERT "multipath: IO failure on %s,"
" disabling IO path. \n Operation continuing"
static int multipath_add_disk(mddev_t *mddev, mdk_rdev_t *rdev)
{
multipath_conf_t *conf = mddev->private;
+ struct request_queue *q;
int found = 0;
int path;
struct multipath_info *p;
for (path=0; path<mddev->raid_disks; path++)
if ((p=conf->multipaths+path)->rdev == NULL) {
- blk_queue_stack_limits(mddev->queue,
- rdev->bdev->bd_disk->queue);
+ q = rdev->bdev->bd_disk->queue;
+ blk_queue_stack_limits(mddev->queue, q);
/* as we don't honour merge_bvec_fn, we must never risk
* violating it, so limit ->max_sector to one PAGE, as
* (Note: it is very unlikely that a device with
* merge_bvec_fn will be involved in multipath.)
*/
- if (rdev->bdev->bd_disk->queue->merge_bvec_fn &&
+ if (q->merge_bvec_fn &&
mddev->queue->max_sectors > (PAGE_SIZE>>9))
blk_queue_max_sectors(mddev->queue, PAGE_SIZE>>9);
* should be freed in multipath_stop()]
*/
- conf = kmalloc(sizeof(multipath_conf_t), GFP_KERNEL);
+ conf = kzalloc(sizeof(multipath_conf_t), GFP_KERNEL);
mddev->private = conf;
if (!conf) {
printk(KERN_ERR
mdname(mddev));
goto out;
}
- memset(conf, 0, sizeof(*conf));
- conf->multipaths = kmalloc(sizeof(struct multipath_info)*mddev->raid_disks,
+ conf->multipaths = kzalloc(sizeof(struct multipath_info)*mddev->raid_disks,
GFP_KERNEL);
if (!conf->multipaths) {
printk(KERN_ERR
mdname(mddev));
goto out_free_conf;
}
- memset(conf->multipaths, 0, sizeof(struct multipath_info)*mddev->raid_disks);
conf->working_disks = 0;
ITERATE_RDEV(mddev,rdev,tmp) {
}
conf->raid_disks = mddev->raid_disks;
- mddev->sb_dirty = 1;
conf->mddev = mddev;
spin_lock_init(&conf->device_lock);
INIT_LIST_HEAD(&conf->retry_list);
}
mddev->degraded = conf->raid_disks = conf->working_disks;
- conf->pool = mempool_create(NR_RESERVED_BUFS,
- mp_pool_alloc, mp_pool_free,
- NULL);
+ conf->pool = mempool_create_kzalloc_pool(NR_RESERVED_BUFS,
+ sizeof(struct multipath_bh));
if (conf->pool == NULL) {
printk(KERN_ERR
"multipath: couldn't allocate memory for %s\n",
mddev->queue->unplug_fn = multipath_unplug;
mddev->queue->issue_flush_fn = multipath_issue_flush;
+ mddev->queue->backing_dev_info.congested_fn = multipath_congested;
+ mddev->queue->backing_dev_info.congested_data = mddev;
return 0;
return 0;
}
-static mdk_personality_t multipath_personality=
+static struct mdk_personality multipath_personality =
{
.name = "multipath",
+ .level = LEVEL_MULTIPATH,
.owner = THIS_MODULE,
.make_request = multipath_make_request,
.run = multipath_run,
static int __init multipath_init (void)
{
- return register_md_personality (MULTIPATH, &multipath_personality);
+ return register_md_personality (&multipath_personality);
}
static void __exit multipath_exit (void)
{
- unregister_md_personality (MULTIPATH);
+ unregister_md_personality (&multipath_personality);
}
module_init(multipath_init);
module_exit(multipath_exit);
MODULE_LICENSE("GPL");
MODULE_ALIAS("md-personality-7"); /* MULTIPATH */
+MODULE_ALIAS("md-multipath");
+MODULE_ALIAS("md-level--4");