X-Git-Url: http://git.rot13.org/?a=blobdiff_plain;f=drivers%2Fmd%2Fmultipath.c;h=171ff41b52b053e7acdc2f6c78e0ef34ed2bd695;hb=1bef84bea273f40486936ae97cda70ee8b252cd0;hp=145cdc5ad008090e67cabe449e10d8cac5395ff1;hpb=4ddccb8eb9d1c57c7dd3838d8328690bf1869145;p=powerpc.git

diff --git a/drivers/md/multipath.c b/drivers/md/multipath.c
index 145cdc5ad0..171ff41b52 100644
--- a/drivers/md/multipath.c
+++ b/drivers/md/multipath.c
@@ -35,23 +35,6 @@
 #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;
@@ -245,6 +228,28 @@ static int multipath_issue_flush(request_queue_t *q, struct gendisk *disk,
 	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!
@@ -270,7 +275,7 @@ static void multipath_error (mddev_t *mddev, mdk_rdev_t *rdev)
 			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"
@@ -308,6 +313,7 @@ static void print_multipath_conf (multipath_conf_t *conf)
 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;
@@ -316,8 +322,8 @@ static int multipath_add_disk(mddev_t *mddev, mdk_rdev_t *rdev)
 
 	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
@@ -325,7 +331,7 @@ static int multipath_add_disk(mddev_t *mddev, mdk_rdev_t *rdev)
 		 * (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);
 
@@ -444,7 +450,7 @@ static int multipath_run (mddev_t *mddev)
 	 * 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 
@@ -452,9 +458,8 @@ static int multipath_run (mddev_t *mddev)
 			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 
@@ -462,7 +467,6 @@ static int multipath_run (mddev_t *mddev)
 			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) {
@@ -488,7 +492,6 @@ static int multipath_run (mddev_t *mddev)
 	}
 
 	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);
@@ -500,9 +503,8 @@ static int multipath_run (mddev_t *mddev)
 	}
 	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",
@@ -529,6 +531,8 @@ static int multipath_run (mddev_t *mddev)
 
 	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;
 
@@ -557,9 +561,10 @@ static int multipath_stop (mddev_t *mddev)
 	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,
@@ -572,15 +577,17 @@ static mdk_personality_t multipath_personality=
 
 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");