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path: root/drivers/md/raid5.c
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Diffstat (limited to 'drivers/md/raid5.c')
-rw-r--r--drivers/md/raid5.c111
1 files changed, 57 insertions, 54 deletions
diff --git a/drivers/md/raid5.c b/drivers/md/raid5.c
index f09e7677ee9f..5c79429acc64 100644
--- a/drivers/md/raid5.c
+++ b/drivers/md/raid5.c
@@ -906,8 +906,7 @@ static bool stripe_can_batch(struct stripe_head *sh)
if (raid5_has_log(conf) || raid5_has_ppl(conf))
return false;
return test_bit(STRIPE_BATCH_READY, &sh->state) &&
- !test_bit(STRIPE_BITMAP_PENDING, &sh->state) &&
- is_full_stripe_write(sh);
+ is_full_stripe_write(sh);
}
/* we only do back search */
@@ -1345,8 +1344,6 @@ again:
submit_bio_noacct(rbi);
}
if (!rdev && !rrdev) {
- if (op_is_write(op))
- set_bit(STRIPE_DEGRADED, &sh->state);
pr_debug("skip op %d on disc %d for sector %llu\n",
bi->bi_opf, i, (unsigned long long)sh->sector);
clear_bit(R5_LOCKED, &sh->dev[i].flags);
@@ -2884,7 +2881,6 @@ static void raid5_end_write_request(struct bio *bi)
set_bit(R5_MadeGoodRepl, &sh->dev[i].flags);
} else {
if (bi->bi_status) {
- set_bit(STRIPE_DEGRADED, &sh->state);
set_bit(WriteErrorSeen, &rdev->flags);
set_bit(R5_WriteError, &sh->dev[i].flags);
if (!test_and_set_bit(WantReplacement, &rdev->flags))
@@ -3548,29 +3544,9 @@ static void __add_stripe_bio(struct stripe_head *sh, struct bio *bi,
(*bip)->bi_iter.bi_sector, sh->sector, dd_idx,
sh->dev[dd_idx].sector);
- if (conf->mddev->bitmap && firstwrite) {
- /* Cannot hold spinlock over bitmap_startwrite,
- * but must ensure this isn't added to a batch until
- * we have added to the bitmap and set bm_seq.
- * So set STRIPE_BITMAP_PENDING to prevent
- * batching.
- * If multiple __add_stripe_bio() calls race here they
- * much all set STRIPE_BITMAP_PENDING. So only the first one
- * to complete "bitmap_startwrite" gets to set
- * STRIPE_BIT_DELAY. This is important as once a stripe
- * is added to a batch, STRIPE_BIT_DELAY cannot be changed
- * any more.
- */
- set_bit(STRIPE_BITMAP_PENDING, &sh->state);
- spin_unlock_irq(&sh->stripe_lock);
- conf->mddev->bitmap_ops->startwrite(conf->mddev, sh->sector,
- RAID5_STRIPE_SECTORS(conf), false);
- spin_lock_irq(&sh->stripe_lock);
- clear_bit(STRIPE_BITMAP_PENDING, &sh->state);
- if (!sh->batch_head) {
- sh->bm_seq = conf->seq_flush+1;
- set_bit(STRIPE_BIT_DELAY, &sh->state);
- }
+ if (conf->mddev->bitmap && firstwrite && !sh->batch_head) {
+ sh->bm_seq = conf->seq_flush+1;
+ set_bit(STRIPE_BIT_DELAY, &sh->state);
}
}
@@ -3621,7 +3597,6 @@ handle_failed_stripe(struct r5conf *conf, struct stripe_head *sh,
BUG_ON(sh->batch_head);
for (i = disks; i--; ) {
struct bio *bi;
- int bitmap_end = 0;
if (test_bit(R5_ReadError, &sh->dev[i].flags)) {
struct md_rdev *rdev = conf->disks[i].rdev;
@@ -3646,8 +3621,6 @@ handle_failed_stripe(struct r5conf *conf, struct stripe_head *sh,
sh->dev[i].towrite = NULL;
sh->overwrite_disks = 0;
spin_unlock_irq(&sh->stripe_lock);
- if (bi)
- bitmap_end = 1;
log_stripe_write_finished(sh);
@@ -3662,11 +3635,6 @@ handle_failed_stripe(struct r5conf *conf, struct stripe_head *sh,
bio_io_error(bi);
bi = nextbi;
}
- if (bitmap_end)
- conf->mddev->bitmap_ops->endwrite(conf->mddev,
- sh->sector, RAID5_STRIPE_SECTORS(conf),
- false, false);
- bitmap_end = 0;
/* and fail all 'written' */
bi = sh->dev[i].written;
sh->dev[i].written = NULL;
@@ -3675,7 +3643,6 @@ handle_failed_stripe(struct r5conf *conf, struct stripe_head *sh,
sh->dev[i].page = sh->dev[i].orig_page;
}
- if (bi) bitmap_end = 1;
while (bi && bi->bi_iter.bi_sector <
sh->dev[i].sector + RAID5_STRIPE_SECTORS(conf)) {
struct bio *bi2 = r5_next_bio(conf, bi, sh->dev[i].sector);
@@ -3709,10 +3676,6 @@ handle_failed_stripe(struct r5conf *conf, struct stripe_head *sh,
bi = nextbi;
}
}
- if (bitmap_end)
- conf->mddev->bitmap_ops->endwrite(conf->mddev,
- sh->sector, RAID5_STRIPE_SECTORS(conf),
- false, false);
/* If we were in the middle of a write the parity block might
* still be locked - so just clear all R5_LOCKED flags
*/
@@ -4061,10 +4024,7 @@ returnbi:
bio_endio(wbi);
wbi = wbi2;
}
- conf->mddev->bitmap_ops->endwrite(conf->mddev,
- sh->sector, RAID5_STRIPE_SECTORS(conf),
- !test_bit(STRIPE_DEGRADED, &sh->state),
- false);
+
if (head_sh->batch_head) {
sh = list_first_entry(&sh->batch_list,
struct stripe_head,
@@ -4341,7 +4301,6 @@ static void handle_parity_checks5(struct r5conf *conf, struct stripe_head *sh,
s->locked++;
set_bit(R5_Wantwrite, &dev->flags);
- clear_bit(STRIPE_DEGRADED, &sh->state);
set_bit(STRIPE_INSYNC, &sh->state);
break;
case check_state_run:
@@ -4498,7 +4457,6 @@ static void handle_parity_checks6(struct r5conf *conf, struct stripe_head *sh,
clear_bit(R5_Wantwrite, &dev->flags);
s->locked--;
}
- clear_bit(STRIPE_DEGRADED, &sh->state);
set_bit(STRIPE_INSYNC, &sh->state);
break;
@@ -4891,8 +4849,7 @@ static void break_stripe_batch_list(struct stripe_head *head_sh,
(1 << STRIPE_COMPUTE_RUN) |
(1 << STRIPE_DISCARD) |
(1 << STRIPE_BATCH_READY) |
- (1 << STRIPE_BATCH_ERR) |
- (1 << STRIPE_BITMAP_PENDING)),
+ (1 << STRIPE_BATCH_ERR)),
"stripe state: %lx\n", sh->state);
WARN_ONCE(head_sh->state & ((1 << STRIPE_DISCARD) |
(1 << STRIPE_REPLACED)),
@@ -4900,7 +4857,6 @@ static void break_stripe_batch_list(struct stripe_head *head_sh,
set_mask_bits(&sh->state, ~(STRIPE_EXPAND_SYNC_FLAGS |
(1 << STRIPE_PREREAD_ACTIVE) |
- (1 << STRIPE_DEGRADED) |
(1 << STRIPE_ON_UNPLUG_LIST)),
head_sh->state & (1 << STRIPE_INSYNC));
@@ -5784,10 +5740,6 @@ static void make_discard_request(struct mddev *mddev, struct bio *bi)
}
spin_unlock_irq(&sh->stripe_lock);
if (conf->mddev->bitmap) {
- for (d = 0; d < conf->raid_disks - conf->max_degraded;
- d++)
- mddev->bitmap_ops->startwrite(mddev, sh->sector,
- RAID5_STRIPE_SECTORS(conf), false);
sh->bm_seq = conf->seq_flush + 1;
set_bit(STRIPE_BIT_DELAY, &sh->state);
}
@@ -5928,6 +5880,54 @@ static enum reshape_loc get_reshape_loc(struct mddev *mddev,
return LOC_BEHIND_RESHAPE;
}
+static void raid5_bitmap_sector(struct mddev *mddev, sector_t *offset,
+ unsigned long *sectors)
+{
+ struct r5conf *conf = mddev->private;
+ sector_t start = *offset;
+ sector_t end = start + *sectors;
+ sector_t prev_start = start;
+ sector_t prev_end = end;
+ int sectors_per_chunk;
+ enum reshape_loc loc;
+ int dd_idx;
+
+ sectors_per_chunk = conf->chunk_sectors *
+ (conf->raid_disks - conf->max_degraded);
+ start = round_down(start, sectors_per_chunk);
+ end = round_up(end, sectors_per_chunk);
+
+ start = raid5_compute_sector(conf, start, 0, &dd_idx, NULL);
+ end = raid5_compute_sector(conf, end, 0, &dd_idx, NULL);
+
+ /*
+ * For LOC_INSIDE_RESHAPE, this IO will wait for reshape to make
+ * progress, hence it's the same as LOC_BEHIND_RESHAPE.
+ */
+ loc = get_reshape_loc(mddev, conf, prev_start);
+ if (likely(loc != LOC_AHEAD_OF_RESHAPE)) {
+ *offset = start;
+ *sectors = end - start;
+ return;
+ }
+
+ sectors_per_chunk = conf->prev_chunk_sectors *
+ (conf->previous_raid_disks - conf->max_degraded);
+ prev_start = round_down(prev_start, sectors_per_chunk);
+ prev_end = round_down(prev_end, sectors_per_chunk);
+
+ prev_start = raid5_compute_sector(conf, prev_start, 1, &dd_idx, NULL);
+ prev_end = raid5_compute_sector(conf, prev_end, 1, &dd_idx, NULL);
+
+ /*
+ * for LOC_AHEAD_OF_RESHAPE, reshape can make progress before this IO
+ * is handled in make_stripe_request(), we can't know this here hence
+ * we set bits for both.
+ */
+ *offset = min(start, prev_start);
+ *sectors = max(end, prev_end) - *offset;
+}
+
static enum stripe_result make_stripe_request(struct mddev *mddev,
struct r5conf *conf, struct stripe_request_ctx *ctx,
sector_t logical_sector, struct bio *bi)
@@ -8976,6 +8976,7 @@ static struct md_personality raid6_personality =
.takeover = raid6_takeover,
.change_consistency_policy = raid5_change_consistency_policy,
.prepare_suspend = raid5_prepare_suspend,
+ .bitmap_sector = raid5_bitmap_sector,
};
static struct md_personality raid5_personality =
{
@@ -9001,6 +9002,7 @@ static struct md_personality raid5_personality =
.takeover = raid5_takeover,
.change_consistency_policy = raid5_change_consistency_policy,
.prepare_suspend = raid5_prepare_suspend,
+ .bitmap_sector = raid5_bitmap_sector,
};
static struct md_personality raid4_personality =
@@ -9027,6 +9029,7 @@ static struct md_personality raid4_personality =
.takeover = raid4_takeover,
.change_consistency_policy = raid5_change_consistency_policy,
.prepare_suspend = raid5_prepare_suspend,
+ .bitmap_sector = raid5_bitmap_sector,
};
static int __init raid5_init(void)
generated by cgit v1.2.3 (git 2.39.0) at 2025-05-08 07:17:01 +0300