dm exception store: add merge specific methods

[safe/jmp/linux-2.6] / drivers / md / raid1.c

diff --git a/drivers/md/raid1.c b/drivers/md/raid1.c
index 8726fd7..e07ce2e 100644 (file)
--- a/drivers/md/raid1.c
+++ b/drivers/md/raid1.c
@@ -64,7 +64,7 @@ static void * r1bio_pool_alloc(gfp_t gfp_flags, void *data)
 
        /* allocate a r1bio with room for raid_disks entries in the bios array */
        r1_bio = kzalloc(size, gfp_flags);
-       if (!r1_bio)
+       if (!r1_bio && pi->mddev)
                unplug_slaves(pi->mddev);
 
        return r1_bio;
@@ -576,6 +576,9 @@ static int raid1_congested(void *data, int bits)
        conf_t *conf = mddev->private;
        int i, ret = 0;
 
+       if (mddev_congested(mddev, bits))
+               return 1;
+
        rcu_read_lock();
        for (i = 0; i < mddev->raid_disks; i++) {
                mdk_rdev_t *rdev = rcu_dereference(conf->mirrors[i].rdev);
@@ -782,8 +785,9 @@ static int make_request(struct request_queue *q, struct bio * bio)
        struct bio_list bl;
        struct page **behind_pages = NULL;
        const int rw = bio_data_dir(bio);
-       const int do_sync = bio_sync(bio);
-       int cpu, do_barriers;
+       const bool do_sync = bio_rw_flagged(bio, BIO_RW_SYNCIO);
+       int cpu;
+       bool do_barriers;
        mdk_rdev_t *blocked_rdev;
 
        /*
@@ -797,7 +801,8 @@ static int make_request(struct request_queue *q, struct bio * bio)
 
        md_write_start(mddev, bio); /* wait on superblock update early */
 
-       if (unlikely(!mddev->barriers_work && bio_barrier(bio))) {
+       if (unlikely(!mddev->barriers_work &&
+                    bio_rw_flagged(bio, BIO_RW_BARRIER))) {
                if (rw == WRITE)
                        md_write_end(mddev);
                bio_endio(bio, -EOPNOTSUPP);
@@ -849,7 +854,7 @@ static int make_request(struct request_queue *q, struct bio * bio)
                read_bio->bi_sector = r1_bio->sector + mirror->rdev->data_offset;
                read_bio->bi_bdev = mirror->rdev->bdev;
                read_bio->bi_end_io = raid1_end_read_request;
-               read_bio->bi_rw = READ | do_sync;
+               read_bio->bi_rw = READ | (do_sync << BIO_RW_SYNCIO);
                read_bio->bi_private = r1_bio;
 
                generic_make_request(read_bio);
@@ -925,7 +930,7 @@ static int make_request(struct request_queue *q, struct bio * bio)
        atomic_set(&r1_bio->remaining, 0);
        atomic_set(&r1_bio->behind_remaining, 0);
 
-       do_barriers = bio_barrier(bio);
+       do_barriers = bio_rw_flagged(bio, BIO_RW_BARRIER);
        if (do_barriers)
                set_bit(R1BIO_Barrier, &r1_bio->state);
 
@@ -941,7 +946,8 @@ static int make_request(struct request_queue *q, struct bio * bio)
                mbio->bi_sector = r1_bio->sector + conf->mirrors[i].rdev->data_offset;
                mbio->bi_bdev = conf->mirrors[i].rdev->bdev;
                mbio->bi_end_io = raid1_end_write_request;
-               mbio->bi_rw = WRITE | do_barriers | do_sync;
+               mbio->bi_rw = WRITE | (do_barriers << BIO_RW_BARRIER) |
+                       (do_sync << BIO_RW_SYNCIO);
                mbio->bi_private = r1_bio;
 
                if (behind_pages) {
@@ -1600,7 +1606,7 @@ static void raid1d(mddev_t *mddev)
                         * We already have a nr_pending reference on these rdevs.
                         */
                        int i;
-                       const int do_sync = bio_sync(r1_bio->master_bio);
+                       const bool do_sync = bio_rw_flagged(r1_bio->master_bio, BIO_RW_SYNCIO);
                        clear_bit(R1BIO_BarrierRetry, &r1_bio->state);
                        clear_bit(R1BIO_Barrier, &r1_bio->state);
                        for (i=0; i < conf->raid_disks; i++)
@@ -1621,7 +1627,8 @@ static void raid1d(mddev_t *mddev)
                                                conf->mirrors[i].rdev->data_offset;
                                        bio->bi_bdev = conf->mirrors[i].rdev->bdev;
                                        bio->bi_end_io = raid1_end_write_request;
-                                       bio->bi_rw = WRITE | do_sync;
+                                       bio->bi_rw = WRITE |
+                                               (do_sync << BIO_RW_SYNCIO);
                                        bio->bi_private = r1_bio;
                                        r1_bio->bios[i] = bio;
                                        generic_make_request(bio);
@@ -1643,18 +1650,19 @@ static void raid1d(mddev_t *mddev)
                                               r1_bio->sector,
                                               r1_bio->sectors);
                                unfreeze_array(conf);
-                       }
+                       } else
+                               md_error(mddev,
+                                        conf->mirrors[r1_bio->read_disk].rdev);
 
                        bio = r1_bio->bios[r1_bio->read_disk];
-                       if ((disk=read_balance(conf, r1_bio)) == -1 ||
-                           disk == r1_bio->read_disk) {
+                       if ((disk=read_balance(conf, r1_bio)) == -1) {
                                printk(KERN_ALERT "raid1: %s: unrecoverable I/O"
                                       " read error for block %llu\n",
                                       bdevname(bio->bi_bdev,b),
                                       (unsigned long long)r1_bio->sector);
                                raid_end_bio_io(r1_bio);
                        } else {
-                               const int do_sync = bio_sync(r1_bio->master_bio);
+                               const bool do_sync = bio_rw_flagged(r1_bio->master_bio, BIO_RW_SYNCIO);
                                r1_bio->bios[r1_bio->read_disk] =
                                        mddev->ro ? IO_BLOCKED : NULL;
                                r1_bio->read_disk = disk;
@@ -1670,12 +1678,13 @@ static void raid1d(mddev_t *mddev)
                                bio->bi_sector = r1_bio->sector + rdev->data_offset;
                                bio->bi_bdev = rdev->bdev;
                                bio->bi_end_io = raid1_end_read_request;
-                               bio->bi_rw = READ | do_sync;
+                               bio->bi_rw = READ | (do_sync << BIO_RW_SYNCIO);
                                bio->bi_private = r1_bio;
                                unplug = 1;
                                generic_make_request(bio);
                        }
                }
+               cond_resched();
        }
        if (unplug)
                unplug_slaves(mddev);
@@ -1971,13 +1980,14 @@ static int run(mddev_t *mddev)
        conf->poolinfo = kmalloc(sizeof(*conf->poolinfo), GFP_KERNEL);
        if (!conf->poolinfo)
                goto out_no_mem;
-       conf->poolinfo->mddev = mddev;
+       conf->poolinfo->mddev = NULL;
        conf->poolinfo->raid_disks = mddev->raid_disks;
        conf->r1bio_pool = mempool_create(NR_RAID1_BIOS, r1bio_pool_alloc,
                                          r1bio_pool_free,
                                          conf->poolinfo);
        if (!conf->r1bio_pool)
                goto out_no_mem;
+       conf->poolinfo->mddev = mddev;
 
        spin_lock_init(&conf->device_lock);
        mddev->queue->queue_lock = &conf->device_lock;
@@ -2045,7 +2055,7 @@ static int run(mddev_t *mddev)
        conf->last_used = j;
 
 
-       mddev->thread = md_register_thread(raid1d, mddev, "%s_raid1");
+       mddev->thread = md_register_thread(raid1d, mddev, NULL);
        if (!mddev->thread) {
                printk(KERN_ERR
                       "raid1: couldn't allocate thread for %s\n",