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-rw-r--r--drivers/md/raid10.c154
1 files changed, 121 insertions, 33 deletions
diff --git a/drivers/md/raid10.c b/drivers/md/raid10.c
index 6022e2aaf3aa..fc9ebbab3f62 100644
--- a/drivers/md/raid10.c
+++ b/drivers/md/raid10.c
@@ -1141,7 +1141,7 @@ retry_write:
wake_up(&conf->wait_barrier);
if (sectors_handled < (bio->bi_size >> 9)) {
- /* We need another r1_bio. It has already been counted
+ /* We need another r10_bio. It has already been counted
* in bio->bi_phys_segments.
*/
r10_bio = mempool_alloc(conf->r10bio_pool, GFP_NOIO);
@@ -1438,29 +1438,10 @@ static void end_sync_read(struct bio *bio, int error)
}
}
-static void end_sync_write(struct bio *bio, int error)
+static void end_sync_request(r10bio_t *r10_bio)
{
- int uptodate = test_bit(BIO_UPTODATE, &bio->bi_flags);
- r10bio_t *r10_bio = bio->bi_private;
mddev_t *mddev = r10_bio->mddev;
- conf_t *conf = mddev->private;
- int d;
- sector_t first_bad;
- int bad_sectors;
- int slot;
-
- d = find_bio_disk(conf, r10_bio, bio, &slot);
-
- if (!uptodate) {
- set_bit(WriteErrorSeen, &conf->mirrors[d].rdev->flags);
- set_bit(R10BIO_WriteError, &r10_bio->state);
- } else if (is_badblock(conf->mirrors[d].rdev,
- r10_bio->devs[slot].addr,
- r10_bio->sectors,
- &first_bad, &bad_sectors))
- set_bit(R10BIO_MadeGood, &r10_bio->state);
- 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 */
@@ -1484,6 +1465,33 @@ static void end_sync_write(struct bio *bio, int error)
}
}
+static void end_sync_write(struct bio *bio, int error)
+{
+ int uptodate = test_bit(BIO_UPTODATE, &bio->bi_flags);
+ r10bio_t *r10_bio = bio->bi_private;
+ mddev_t *mddev = r10_bio->mddev;
+ conf_t *conf = mddev->private;
+ int d;
+ sector_t first_bad;
+ int bad_sectors;
+ int slot;
+
+ d = find_bio_disk(conf, r10_bio, bio, &slot);
+
+ if (!uptodate) {
+ set_bit(WriteErrorSeen, &conf->mirrors[d].rdev->flags);
+ set_bit(R10BIO_WriteError, &r10_bio->state);
+ } else if (is_badblock(conf->mirrors[d].rdev,
+ r10_bio->devs[slot].addr,
+ r10_bio->sectors,
+ &first_bad, &bad_sectors))
+ set_bit(R10BIO_MadeGood, &r10_bio->state);
+
+ rdev_dec_pending(conf->mirrors[d].rdev, mddev);
+
+ end_sync_request(r10_bio);
+}
+
/*
* Note: sync and recover and handled very differently for raid10
* This code is for resync.
@@ -1600,6 +1608,84 @@ done:
* The second for writing.
*
*/
+static void fix_recovery_read_error(r10bio_t *r10_bio)
+{
+ /* We got a read error during recovery.
+ * We repeat the read in smaller page-sized sections.
+ * If a read succeeds, write it to the new device or record
+ * a bad block if we cannot.
+ * If a read fails, record a bad block on both old and
+ * new devices.
+ */
+ mddev_t *mddev = r10_bio->mddev;
+ conf_t *conf = mddev->private;
+ struct bio *bio = r10_bio->devs[0].bio;
+ sector_t sect = 0;
+ int sectors = r10_bio->sectors;
+ int idx = 0;
+ int dr = r10_bio->devs[0].devnum;
+ int dw = r10_bio->devs[1].devnum;
+
+ while (sectors) {
+ int s = sectors;
+ mdk_rdev_t *rdev;
+ sector_t addr;
+ int ok;
+
+ if (s > (PAGE_SIZE>>9))
+ s = PAGE_SIZE >> 9;
+
+ rdev = conf->mirrors[dr].rdev;
+ addr = r10_bio->devs[0].addr + sect,
+ ok = sync_page_io(rdev,
+ addr,
+ s << 9,
+ bio->bi_io_vec[idx].bv_page,
+ READ, false);
+ if (ok) {
+ rdev = conf->mirrors[dw].rdev;
+ addr = r10_bio->devs[1].addr + sect;
+ ok = sync_page_io(rdev,
+ addr,
+ s << 9,
+ bio->bi_io_vec[idx].bv_page,
+ WRITE, false);
+ if (!ok)
+ set_bit(WriteErrorSeen, &rdev->flags);
+ }
+ if (!ok) {
+ /* We don't worry if we cannot set a bad block -
+ * it really is bad so there is no loss in not
+ * recording it yet
+ */
+ rdev_set_badblocks(rdev, addr, s, 0);
+
+ if (rdev != conf->mirrors[dw].rdev) {
+ /* need bad block on destination too */
+ mdk_rdev_t *rdev2 = conf->mirrors[dw].rdev;
+ addr = r10_bio->devs[1].addr + sect;
+ ok = rdev_set_badblocks(rdev2, addr, s, 0);
+ if (!ok) {
+ /* just abort the recovery */
+ printk(KERN_NOTICE
+ "md/raid10:%s: recovery aborted"
+ " due to read error\n",
+ mdname(mddev));
+
+ conf->mirrors[dw].recovery_disabled
+ = mddev->recovery_disabled;
+ set_bit(MD_RECOVERY_INTR,
+ &mddev->recovery);
+ break;
+ }
+ }
+ }
+
+ sectors -= s;
+ sect += s;
+ idx++;
+ }
+}
static void recovery_request_write(mddev_t *mddev, r10bio_t *r10_bio)
{
@@ -1607,6 +1693,12 @@ static void recovery_request_write(mddev_t *mddev, r10bio_t *r10_bio)
int d;
struct bio *wbio;
+ if (!test_bit(R10BIO_Uptodate, &r10_bio->state)) {
+ fix_recovery_read_error(r10_bio);
+ end_sync_request(r10_bio);
+ return;
+ }
+
/*
* share the pages with the first bio
* and submit the write request
@@ -1616,16 +1708,7 @@ static void recovery_request_write(mddev_t *mddev, r10bio_t *r10_bio)
atomic_inc(&conf->mirrors[d].rdev->nr_pending);
md_sync_acct(conf->mirrors[d].rdev->bdev, wbio->bi_size >> 9);
- if (test_bit(R10BIO_Uptodate, &r10_bio->state))
- generic_make_request(wbio);
- else {
- printk(KERN_NOTICE
- "md/raid10:%s: recovery aborted due to read error\n",
- mdname(mddev));
- conf->mirrors[d].recovery_disabled = mddev->recovery_disabled;
- set_bit(MD_RECOVERY_INTR, &mddev->recovery);
- bio_endio(wbio, 0);
- }
+ generic_make_request(wbio);
}
@@ -2339,6 +2422,7 @@ static sector_t sync_request(mddev_t *mddev, sector_t sector_nr,
for (j=0; j<conf->copies;j++) {
int k;
int d = r10_bio->devs[j].devnum;
+ sector_t from_addr, to_addr;
mdk_rdev_t *rdev;
sector_t sector, first_bad;
int bad_sectors;
@@ -2368,7 +2452,8 @@ static sector_t sync_request(mddev_t *mddev, sector_t sector_nr,
bio->bi_private = r10_bio;
bio->bi_end_io = end_sync_read;
bio->bi_rw = READ;
- bio->bi_sector = r10_bio->devs[j].addr +
+ from_addr = r10_bio->devs[j].addr;
+ bio->bi_sector = from_addr +
conf->mirrors[d].rdev->data_offset;
bio->bi_bdev = conf->mirrors[d].rdev->bdev;
atomic_inc(&conf->mirrors[d].rdev->nr_pending);
@@ -2385,12 +2470,15 @@ static sector_t sync_request(mddev_t *mddev, sector_t sector_nr,
bio->bi_private = r10_bio;
bio->bi_end_io = end_sync_write;
bio->bi_rw = WRITE;
- bio->bi_sector = r10_bio->devs[k].addr +
+ to_addr = r10_bio->devs[k].addr;
+ bio->bi_sector = to_addr +
conf->mirrors[i].rdev->data_offset;
bio->bi_bdev = conf->mirrors[i].rdev->bdev;
r10_bio->devs[0].devnum = d;
+ r10_bio->devs[0].addr = from_addr;
r10_bio->devs[1].devnum = i;
+ r10_bio->devs[1].addr = to_addr;
break;
}
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