-
-read_more:
- rdev = read_balance(conf, r10_bio, &max_sectors);
- if (rdev == NULL) {
- pr_crit_ratelimited("md/raid10:%s: %s: unrecoverable I/O read error for block %llu\n",
- mdname(mddev), b,
- (unsigned long long)r10_bio->sector);
- raid_end_bio_io(r10_bio);
- return;
- }
-
- do_sync = (r10_bio->master_bio->bi_opf & REQ_SYNC);
- slot = r10_bio->read_slot;
- pr_err_ratelimited("md/raid10:%s: %s: redirecting sector %llu to another mirror\n",
- mdname(mddev),
- bdevname(rdev->bdev, b),
- (unsigned long long)r10_bio->sector);
- bio = bio_clone_fast(r10_bio->master_bio, GFP_NOIO, mddev->bio_set);
- bio_trim(bio, r10_bio->sector - bio->bi_iter.bi_sector, max_sectors);
- r10_bio->devs[slot].bio = bio;
- r10_bio->devs[slot].rdev = rdev;
- bio->bi_iter.bi_sector = r10_bio->devs[slot].addr
- + choose_data_offset(r10_bio, rdev);
- bio->bi_bdev = rdev->bdev;
- bio_set_op_attrs(bio, REQ_OP_READ, do_sync);
- if (test_bit(FailFast, &rdev->flags) &&
- test_bit(R10BIO_FailFast, &r10_bio->state))
- bio->bi_opf |= MD_FAILFAST;
- bio->bi_private = r10_bio;
- bio->bi_end_io = raid10_end_read_request;
- trace_block_bio_remap(bdev_get_queue(bio->bi_bdev),
- bio, bio_dev,
- bio_last_sector - r10_bio->sectors);
-
- if (max_sectors < r10_bio->sectors) {
- /* Drat - have to split this up more */
- struct bio *mbio = r10_bio->master_bio;
- int sectors_handled =
- r10_bio->sector + max_sectors
- - mbio->bi_iter.bi_sector;
- r10_bio->sectors = max_sectors;
- bio_inc_remaining(mbio);
- inc_pending(conf);
- generic_make_request(bio);
-
- r10_bio = mempool_alloc(conf->r10bio_pool,
- GFP_NOIO);
- r10_bio->master_bio = mbio;
- r10_bio->sectors = bio_sectors(mbio) - sectors_handled;
- r10_bio->state = 0;
- set_bit(R10BIO_ReadError,
- &r10_bio->state);
- r10_bio->mddev = mddev;
- r10_bio->sector = mbio->bi_iter.bi_sector
- + sectors_handled;
-
- goto read_more;
- } else
- generic_make_request(bio);