/* Set when the read-repair is finished. */
SCRUB_STRIPE_FLAG_REPAIR_DONE,
+
+ /*
+ * Set for data stripes if it's triggered from P/Q stripe.
+ * During such scrub, we should not report errors in data stripes, nor
+ * update the accounting.
+ */
+ SCRUB_STRIPE_FLAG_NO_REPORT,
};
#define SCRUB_STRIPE_PAGES (BTRFS_STRIPE_LEN / PAGE_SIZE)
struct scrub_ctx {
struct scrub_bio *bios[SCRUB_BIOS_PER_SCTX];
struct scrub_stripe stripes[SCRUB_STRIPES_PER_SCTX];
+ struct scrub_stripe *raid56_data_stripes;
struct btrfs_fs_info *fs_info;
int first_free;
int curr;
int nr_repaired_sectors = 0;
int sector_nr;
+ if (test_bit(SCRUB_STRIPE_FLAG_NO_REPORT, &stripe->state))
+ return;
+
/*
* Init needed infos for error reporting.
*
return ret;
}
-static noinline_for_stack int scrub_raid56_parity(struct scrub_ctx *sctx,
- struct map_lookup *map,
- struct btrfs_device *sdev,
- u64 logic_start,
- u64 logic_end)
+int scrub_raid56_parity(struct scrub_ctx *sctx, struct map_lookup *map,
+ struct btrfs_device *sdev, u64 logic_start, u64 logic_end)
{
struct btrfs_fs_info *fs_info = sctx->fs_info;
struct btrfs_path *path;
sctx->cur_stripe = 0;
}
+static void raid56_scrub_wait_endio(struct bio *bio)
+{
+ complete(bio->bi_private);
+}
+
static int queue_scrub_stripe(struct scrub_ctx *sctx, struct btrfs_block_group *bg,
struct btrfs_device *dev, int mirror_num,
u64 logical, u32 length, u64 physical)
return 0;
}
+static int scrub_raid56_parity_stripe(struct scrub_ctx *sctx,
+ struct btrfs_device *scrub_dev,
+ struct btrfs_block_group *bg,
+ struct map_lookup *map,
+ u64 full_stripe_start)
+{
+ DECLARE_COMPLETION_ONSTACK(io_done);
+ struct btrfs_fs_info *fs_info = sctx->fs_info;
+ struct btrfs_raid_bio *rbio;
+ struct btrfs_io_context *bioc = NULL;
+ struct bio *bio;
+ struct scrub_stripe *stripe;
+ bool all_empty = true;
+ const int data_stripes = nr_data_stripes(map);
+ unsigned long extent_bitmap = 0;
+ u64 length = data_stripes << BTRFS_STRIPE_LEN_SHIFT;
+ int ret;
+
+ ASSERT(sctx->raid56_data_stripes);
+
+ for (int i = 0; i < data_stripes; i++) {
+ int stripe_index;
+ int rot;
+ u64 physical;
+
+ stripe = &sctx->raid56_data_stripes[i];
+ rot = div_u64(full_stripe_start - bg->start,
+ data_stripes) >> BTRFS_STRIPE_LEN_SHIFT;
+ stripe_index = (i + rot) % map->num_stripes;
+ physical = map->stripes[stripe_index].physical +
+ (rot << BTRFS_STRIPE_LEN_SHIFT);
+
+ scrub_reset_stripe(stripe);
+ set_bit(SCRUB_STRIPE_FLAG_NO_REPORT, &stripe->state);
+ ret = scrub_find_fill_first_stripe(bg,
+ map->stripes[stripe_index].dev, physical, 1,
+ full_stripe_start + (i << BTRFS_STRIPE_LEN_SHIFT),
+ BTRFS_STRIPE_LEN, stripe);
+ if (ret < 0)
+ goto out;
+ /*
+ * No extent in this data stripe, need to manually mark them
+ * initialized to make later read submission happy.
+ */
+ if (ret > 0) {
+ stripe->logical = full_stripe_start +
+ (i << BTRFS_STRIPE_LEN_SHIFT);
+ stripe->dev = map->stripes[stripe_index].dev;
+ stripe->mirror_num = 1;
+ set_bit(SCRUB_STRIPE_FLAG_INITIALIZED, &stripe->state);
+ }
+ }
+
+ /* Check if all data stripes are empty. */
+ for (int i = 0; i < data_stripes; i++) {
+ stripe = &sctx->raid56_data_stripes[i];
+ if (!bitmap_empty(&stripe->extent_sector_bitmap, stripe->nr_sectors)) {
+ all_empty = false;
+ break;
+ }
+ }
+ if (all_empty) {
+ ret = 0;
+ goto out;
+ }
+
+ for (int i = 0; i < data_stripes; i++) {
+ stripe = &sctx->raid56_data_stripes[i];
+ scrub_submit_initial_read(sctx, stripe);
+ }
+ for (int i = 0; i < data_stripes; i++) {
+ stripe = &sctx->raid56_data_stripes[i];
+
+ wait_event(stripe->repair_wait,
+ test_bit(SCRUB_STRIPE_FLAG_REPAIR_DONE, &stripe->state));
+ }
+ /* For now, no zoned support for RAID56. */
+ ASSERT(!btrfs_is_zoned(sctx->fs_info));
+
+ /* Writeback for the repaired sectors. */
+ for (int i = 0; i < data_stripes; i++) {
+ unsigned long repaired;
+
+ stripe = &sctx->raid56_data_stripes[i];
+
+ bitmap_andnot(&repaired, &stripe->init_error_bitmap,
+ &stripe->error_bitmap, stripe->nr_sectors);
+ scrub_write_sectors(sctx, stripe, repaired, false);
+ }
+
+ /* Wait for the above writebacks to finish. */
+ for (int i = 0; i < data_stripes; i++) {
+ stripe = &sctx->raid56_data_stripes[i];
+
+ wait_scrub_stripe_io(stripe);
+ }
+
+ /*
+ * Now all data stripes are properly verified. Check if we have any
+ * unrepaired, if so abort immediately or we could further corrupt the
+ * P/Q stripes.
+ *
+ * During the loop, also populate extent_bitmap.
+ */
+ for (int i = 0; i < data_stripes; i++) {
+ unsigned long error;
+
+ stripe = &sctx->raid56_data_stripes[i];
+
+ /*
+ * We should only check the errors where there is an extent.
+ * As we may hit an empty data stripe while it's missing.
+ */
+ bitmap_and(&error, &stripe->error_bitmap,
+ &stripe->extent_sector_bitmap, stripe->nr_sectors);
+ if (!bitmap_empty(&error, stripe->nr_sectors)) {
+ btrfs_err(fs_info,
+"unrepaired sectors detected, full stripe %llu data stripe %u errors %*pbl",
+ full_stripe_start, i, stripe->nr_sectors,
+ &error);
+ ret = -EIO;
+ goto out;
+ }
+ bitmap_or(&extent_bitmap, &extent_bitmap,
+ &stripe->extent_sector_bitmap, stripe->nr_sectors);
+ }
+
+ /* Now we can check and regenerate the P/Q stripe. */
+ bio = bio_alloc(NULL, 1, REQ_OP_READ, GFP_NOFS);
+ bio->bi_iter.bi_sector = full_stripe_start >> SECTOR_SHIFT;
+ bio->bi_private = &io_done;
+ bio->bi_end_io = raid56_scrub_wait_endio;
+
+ btrfs_bio_counter_inc_blocked(fs_info);
+ ret = btrfs_map_sblock(fs_info, BTRFS_MAP_WRITE, full_stripe_start,
+ &length, &bioc);
+ if (ret < 0) {
+ btrfs_put_bioc(bioc);
+ btrfs_bio_counter_dec(fs_info);
+ goto out;
+ }
+ rbio = raid56_parity_alloc_scrub_rbio(bio, bioc, scrub_dev, &extent_bitmap,
+ BTRFS_STRIPE_LEN >> fs_info->sectorsize_bits);
+ btrfs_put_bioc(bioc);
+ if (!rbio) {
+ ret = -ENOMEM;
+ btrfs_bio_counter_dec(fs_info);
+ goto out;
+ }
+ raid56_parity_submit_scrub_rbio(rbio);
+ wait_for_completion_io(&io_done);
+ ret = blk_status_to_errno(bio->bi_status);
+ bio_put(bio);
+ btrfs_bio_counter_dec(fs_info);
+
+out:
+ return ret;
+}
+
/*
* Scrub one range which can only has simple mirror based profile.
* (Including all range in SINGLE/DUP/RAID1/RAID1C*, and each stripe in
/* Offset inside the chunk */
u64 offset;
u64 stripe_logical;
- u64 stripe_end;
int stop_loop = 0;
wait_event(sctx->list_wait,
sctx->flush_all_writes = true;
}
+ /* Prepare the extra data stripes used by RAID56. */
+ if (profile & BTRFS_BLOCK_GROUP_RAID56_MASK) {
+ ASSERT(sctx->raid56_data_stripes == NULL);
+
+ sctx->raid56_data_stripes = kcalloc(nr_data_stripes(map),
+ sizeof(struct scrub_stripe),
+ GFP_KERNEL);
+ if (!sctx->raid56_data_stripes) {
+ ret = -ENOMEM;
+ goto out;
+ }
+ for (int i = 0; i < nr_data_stripes(map); i++) {
+ ret = init_scrub_stripe(fs_info,
+ &sctx->raid56_data_stripes[i]);
+ if (ret < 0)
+ goto out;
+ sctx->raid56_data_stripes[i].bg = bg;
+ sctx->raid56_data_stripes[i].sctx = sctx;
+ }
+ }
/*
* There used to be a big double loop to handle all profiles using the
* same routine, which grows larger and more gross over time.
if (ret) {
/* it is parity strip */
stripe_logical += chunk_logical;
- stripe_end = stripe_logical + increment;
- ret = scrub_raid56_parity(sctx, map, scrub_dev,
- stripe_logical,
- stripe_end);
+ ret = scrub_raid56_parity_stripe(sctx, scrub_dev, bg,
+ map, stripe_logical);
if (ret)
goto out;
goto next;
scrub_wr_submit(sctx);
mutex_unlock(&sctx->wr_lock);
flush_scrub_stripes(sctx);
+ if (sctx->raid56_data_stripes) {
+ for (int i = 0; i < nr_data_stripes(map); i++)
+ release_scrub_stripe(&sctx->raid56_data_stripes[i]);
+ kfree(sctx->raid56_data_stripes);
+ sctx->raid56_data_stripes = NULL;
+ }
if (sctx->is_dev_replace && ret >= 0) {
int ret2;
projects / linux-2.6-microblaze.git / commitdiff