Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/djbw/async_tx

[~andy/linux] / drivers / md / raid10.c

diff --git a/drivers/md/raid10.c b/drivers/md/raid10.c
index 6736d6dff981c8a1a5c12e773c3d788410a0f191..e293d92641acc2b61c5767d3b343702fd65a509b 100644 (file)
--- a/drivers/md/raid10.c
+++ b/drivers/md/raid10.c
@@ -18,10 +18,13 @@
  * Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  */
 
-#include "dm-bio-list.h"
 #include <linux/delay.h>
-#include <linux/raid/raid10.h>
-#include <linux/raid/bitmap.h>
+#include <linux/blkdev.h>
+#include <linux/seq_file.h>
+#include "md.h"
+#include "dm-bio-list.h"
+#include "raid10.h"
+#include "bitmap.h"
 
 /*
  * RAID10 provides a combination of RAID0 and RAID1 functionality.
@@ -1236,6 +1239,7 @@ static void end_sync_read(struct bio *bio, int error)
        /* for reconstruct, we always reschedule after a read.
         * for resync, only after all reads
         */
+       rdev_dec_pending(conf->mirrors[d].rdev, conf->mddev);
        if (test_bit(R10BIO_IsRecover, &r10_bio->state) ||
            atomic_dec_and_test(&r10_bio->remaining)) {
                /* we have read all the blocks,
@@ -1243,7 +1247,6 @@ static void end_sync_read(struct bio *bio, int error)
                 */
                reschedule_retry(r10_bio);
        }
-       rdev_dec_pending(conf->mirrors[d].rdev, conf->mddev);
 }
 
 static void end_sync_write(struct bio *bio, int error)
@@ -1264,11 +1267,13 @@ static void end_sync_write(struct bio *bio, int error)
 
        update_head_pos(i, r10_bio);
 
+       rdev_dec_pending(conf->mirrors[d].rdev, mddev);
        while (atomic_dec_and_test(&r10_bio->remaining)) {
                if (r10_bio->master_bio == NULL) {
                        /* the primary of several recovery bios */
-                       md_done_sync(mddev, r10_bio->sectors, 1);
+                       sector_t s = r10_bio->sectors;
                        put_buf(r10_bio);
+                       md_done_sync(mddev, s, 1);
                        break;
                } else {
                        r10bio_t *r10_bio2 = (r10bio_t *)r10_bio->master_bio;
@@ -1276,7 +1281,6 @@ static void end_sync_write(struct bio *bio, int error)
                        r10_bio = r10_bio2;
                }
        }
-       rdev_dec_pending(conf->mirrors[d].rdev, mddev);
 }
 
 /*
@@ -1694,7 +1698,7 @@ static sector_t sync_request(mddev_t *mddev, sector_t sector_nr, int *skipped, i
                        return 0;
 
  skipped:
-       max_sector = mddev->size << 1;
+       max_sector = mddev->dev_sectors;
        if (test_bit(MD_RECOVERY_SYNC, &mddev->recovery))
                max_sector = mddev->resync_max_sectors;
        if (sector_nr >= max_sector) {
@@ -1749,8 +1753,6 @@ static sector_t sync_request(mddev_t *mddev, sector_t sector_nr, int *skipped, i
        if (!go_faster && conf->nr_waiting)
                msleep_interruptible(1000);
 
-       bitmap_cond_end_sync(mddev->bitmap, sector_nr);
-
        /* Again, very different code for resync and recovery.
         * Both must result in an r10bio with a list of bios that
         * have bi_end_io, bi_sector, bi_bdev set,
@@ -1886,6 +1888,8 @@ static sector_t sync_request(mddev_t *mddev, sector_t sector_nr, int *skipped, i
                /* resync. Schedule a read for every block at this virt offset */
                int count = 0;
 
+               bitmap_cond_end_sync(mddev->bitmap, sector_nr);
+
                if (!bitmap_start_sync(mddev->bitmap, sector_nr,
                                       &sync_blocks, mddev->degraded) &&
                    !conf->fullsync && !test_bit(MD_RECOVERY_REQUESTED, &mddev->recovery)) {
@@ -2010,13 +2014,32 @@ static sector_t sync_request(mddev_t *mddev, sector_t sector_nr, int *skipped, i
        /* There is nowhere to write, so all non-sync
         * drives must be failed, so try the next chunk...
         */
-       {
-       sector_t sec = max_sector - sector_nr;
-       sectors_skipped += sec;
+       if (sector_nr + max_sync < max_sector)
+               max_sector = sector_nr + max_sync;
+
+       sectors_skipped += (max_sector - sector_nr);
        chunks_skipped ++;
        sector_nr = max_sector;
        goto skipped;
-       }
+}
+
+static sector_t
+raid10_size(mddev_t *mddev, sector_t sectors, int raid_disks)
+{
+       sector_t size;
+       conf_t *conf = mddev_to_conf(mddev);
+
+       if (!raid_disks)
+               raid_disks = mddev->raid_disks;
+       if (!sectors)
+               sectors = mddev->dev_sectors;
+
+       size = sectors >> conf->chunk_shift;
+       sector_div(size, conf->far_copies);
+       size = size * raid_disks;
+       sector_div(size, conf->near_copies);
+
+       return size << conf->chunk_shift;
 }
 
 static int run(mddev_t *mddev)
@@ -2075,7 +2098,7 @@ static int run(mddev_t *mddev)
        conf->far_offset = fo;
        conf->chunk_mask = (sector_t)(mddev->chunk_size>>9)-1;
        conf->chunk_shift = ffz(~mddev->chunk_size) - 9;
-       size = mddev->size >> (conf->chunk_shift-1);
+       size = mddev->dev_sectors >> conf->chunk_shift;
        sector_div(size, fc);
        size = size * conf->raid_disks;
        sector_div(size, nc);
@@ -2088,7 +2111,7 @@ static int run(mddev_t *mddev)
         */
        stride += conf->raid_disks - 1;
        sector_div(stride, conf->raid_disks);
-       mddev->size = stride  << (conf->chunk_shift-1);
+       mddev->dev_sectors = stride << conf->chunk_shift;
 
        if (fo)
                stride = 1;
@@ -2170,8 +2193,8 @@ static int run(mddev_t *mddev)
        /*
         * Ok, everything is just fine now
         */
-       mddev->array_sectors = size << conf->chunk_shift;
-       mddev->resync_max_sectors = size << conf->chunk_shift;
+       md_set_array_sectors(mddev, raid10_size(mddev, 0, 0));
+       mddev->resync_max_sectors = raid10_size(mddev, 0, 0);
 
        mddev->queue->unplug_fn = raid10_unplug;
        mddev->queue->backing_dev_info.congested_fn = raid10_congested;
@@ -2207,6 +2230,9 @@ static int stop(mddev_t *mddev)
 {
        conf_t *conf = mddev_to_conf(mddev);
 
+       raise_barrier(conf, 0);
+       lower_barrier(conf);
+
        md_unregister_thread(mddev->thread);
        mddev->thread = NULL;
        blk_sync_queue(mddev->queue); /* the unplug fn references 'conf'*/
@@ -2254,6 +2280,7 @@ static struct mdk_personality raid10_personality =
        .spare_active   = raid10_spare_active,
        .sync_request   = sync_request,
        .quiesce        = raid10_quiesce,
+       .size           = raid10_size,
 };
 
 static int __init raid_init(void)