@@ -202,7 +202,7 @@ static void cache_rbio_pages(struct btrfs_raid_bio *rbio)
*/
static int rbio_bucket(struct btrfs_raid_bio *rbio)
{
- u64 num = rbio->bioc->raid_map[0];
+ u64 num = rbio->bioc->full_stripe_logical;
/*
* we shift down quite a bit. We're using byte
@@ -571,7 +571,7 @@ static int rbio_can_merge(struct btrfs_raid_bio *last,
test_bit(RBIO_CACHE_BIT, &cur->flags))
return 0;
- if (last->bioc->raid_map[0] != cur->bioc->raid_map[0])
+ if (last->bioc->full_stripe_logical != cur->bioc->full_stripe_logical)
return 0;
/* we can't merge with different operations */
@@ -666,7 +666,7 @@ static noinline int lock_stripe_add(struct btrfs_raid_bio *rbio)
spin_lock_irqsave(&h->lock, flags);
list_for_each_entry(cur, &h->hash_list, hash_list) {
- if (cur->bioc->raid_map[0] != rbio->bioc->raid_map[0])
+ if (cur->bioc->full_stripe_logical != rbio->bioc->full_stripe_logical)
continue;
spin_lock(&cur->bio_list_lock);
@@ -1119,7 +1119,7 @@ static void index_one_bio(struct btrfs_raid_bio *rbio, struct bio *bio)
struct bio_vec bvec;
struct bvec_iter iter;
u32 offset = (bio->bi_iter.bi_sector << SECTOR_SHIFT) -
- rbio->bioc->raid_map[0];
+ rbio->bioc->full_stripe_logical;
bio_for_each_segment(bvec, bio, iter) {
u32 bvec_offset;
@@ -1343,7 +1343,7 @@ static void set_rbio_range_error(struct btrfs_raid_bio *rbio, struct bio *bio)
{
struct btrfs_fs_info *fs_info = rbio->bioc->fs_info;
u32 offset = (bio->bi_iter.bi_sector << SECTOR_SHIFT) -
- rbio->bioc->raid_map[0];
+ rbio->bioc->full_stripe_logical;
int total_nr_sector = offset >> fs_info->sectorsize_bits;
ASSERT(total_nr_sector < rbio->nr_data * rbio->stripe_nsectors);
@@ -1620,7 +1620,7 @@ static void rbio_add_bio(struct btrfs_raid_bio *rbio, struct bio *orig_bio)
{
const struct btrfs_fs_info *fs_info = rbio->bioc->fs_info;
const u64 orig_logical = orig_bio->bi_iter.bi_sector << SECTOR_SHIFT;
- const u64 full_stripe_start = rbio->bioc->raid_map[0];
+ const u64 full_stripe_start = rbio->bioc->full_stripe_logical;
const u32 orig_len = orig_bio->bi_iter.bi_size;
const u32 sectorsize = fs_info->sectorsize;
u64 cur_logical;
@@ -1807,9 +1807,8 @@ static int recover_vertical(struct btrfs_raid_bio *rbio, int sector_nr,
* here due to a crc mismatch and we can't give them the
* data they want.
*/
- if (rbio->bioc->raid_map[failb] == RAID6_Q_STRIPE) {
- if (rbio->bioc->raid_map[faila] ==
- RAID5_P_STRIPE)
+ if (failb == rbio->real_stripes - 1) {
+ if (faila == rbio->real_stripes - 2)
/*
* Only P and Q are corrupted.
* We only care about data stripes recovery,
@@ -1823,7 +1822,7 @@ static int recover_vertical(struct btrfs_raid_bio *rbio, int sector_nr,
goto pstripe;
}
- if (rbio->bioc->raid_map[failb] == RAID5_P_STRIPE) {
+ if (failb == rbio->real_stripes - 2) {
raid6_datap_recov(rbio->real_stripes, sectorsize,
faila, pointers);
} else {
@@ -2086,8 +2085,8 @@ static void fill_data_csums(struct btrfs_raid_bio *rbio)
{
struct btrfs_fs_info *fs_info = rbio->bioc->fs_info;
struct btrfs_root *csum_root = btrfs_csum_root(fs_info,
- rbio->bioc->raid_map[0]);
- const u64 start = rbio->bioc->raid_map[0];
+ rbio->bioc->full_stripe_logical);
+ const u64 start = rbio->bioc->full_stripe_logical;
const u32 len = (rbio->nr_data * rbio->stripe_nsectors) <<
fs_info->sectorsize_bits;
int ret;
@@ -2135,7 +2134,7 @@ static void fill_data_csums(struct btrfs_raid_bio *rbio)
*/
btrfs_warn_rl(fs_info,
"sub-stripe write for full stripe %llu is not safe, failed to get csum: %d",
- rbio->bioc->raid_map[0], ret);
+ rbio->bioc->full_stripe_logical, ret);
no_csum:
kfree(rbio->csum_buf);
bitmap_free(rbio->csum_bitmap);
@@ -2391,10 +2390,10 @@ void raid56_add_scrub_pages(struct btrfs_raid_bio *rbio, struct page *page,
int stripe_offset;
int index;
- ASSERT(logical >= rbio->bioc->raid_map[0]);
- ASSERT(logical + sectorsize <= rbio->bioc->raid_map[0] +
+ ASSERT(logical >= rbio->bioc->full_stripe_logical);
+ ASSERT(logical + sectorsize <= rbio->bioc->full_stripe_logical +
BTRFS_STRIPE_LEN * rbio->nr_data);
- stripe_offset = (int)(logical - rbio->bioc->raid_map[0]);
+ stripe_offset = (int)(logical - rbio->bioc->full_stripe_logical);
index = stripe_offset / sectorsize;
rbio->bio_sectors[index].page = page;
rbio->bio_sectors[index].pgoff = pgoff;
@@ -1430,7 +1430,7 @@ static inline int scrub_nr_raid_mirrors(struct btrfs_io_context *bioc)
}
static inline void scrub_stripe_index_and_offset(u64 logical, u64 map_type,
- u64 *raid_map,
+ u64 full_stripe_logical,
int nstripes, int mirror,
int *stripe_index,
u64 *stripe_offset)
@@ -1438,19 +1438,21 @@ static inline void scrub_stripe_index_and_offset(u64 logical, u64 map_type,
int i;
if (map_type & BTRFS_BLOCK_GROUP_RAID56_MASK) {
- /* RAID5/6 */
- for (i = 0; i < nstripes; i++) {
- if (raid_map[i] == RAID6_Q_STRIPE ||
- raid_map[i] == RAID5_P_STRIPE)
- continue;
+ const int nr_data_stripes = (map_type & BTRFS_BLOCK_GROUP_RAID5) ?
+ nstripes - 1 : nstripes - 2;
- if (logical >= raid_map[i] &&
- logical < raid_map[i] + BTRFS_STRIPE_LEN)
+ /* RAID5/6 */
+ for (i = 0; i < nr_data_stripes; i++) {
+ const u64 data_stripe_start = full_stripe_logical +
+ (i * BTRFS_STRIPE_LEN);
+
+ if (logical >= data_stripe_start &&
+ logical < data_stripe_start + BTRFS_STRIPE_LEN)
break;
}
*stripe_index = i;
- *stripe_offset = logical - raid_map[i];
+ *stripe_offset = logical - full_stripe_logical;
} else {
/* The other RAID type */
*stripe_index = mirror;
@@ -1538,7 +1540,7 @@ static int scrub_setup_recheck_block(struct scrub_block *original_sblock,
scrub_stripe_index_and_offset(logical,
bioc->map_type,
- bioc->raid_map,
+ bioc->full_stripe_logical,
bioc->num_stripes -
bioc->replace_nr_stripes,
mirror_index,
@@ -2398,7 +2400,7 @@ static void scrub_missing_raid56_pages(struct scrub_block *sblock)
btrfs_bio_counter_inc_blocked(fs_info);
ret = btrfs_map_sblock(fs_info, BTRFS_MAP_GET_READ_MIRRORS, logical,
&length, &bioc);
- if (ret || !bioc || !bioc->raid_map)
+ if (ret || !bioc)
goto bioc_out;
if (WARN_ON(!sctx->is_dev_replace ||
@@ -3008,7 +3010,7 @@ static void scrub_parity_check_and_repair(struct scrub_parity *sparity)
btrfs_bio_counter_inc_blocked(fs_info);
ret = btrfs_map_sblock(fs_info, BTRFS_MAP_WRITE, sparity->logic_start,
&length, &bioc);
- if (ret || !bioc || !bioc->raid_map)
+ if (ret || !bioc)
goto bioc_out;
bio = bio_alloc(NULL, BIO_MAX_VECS, REQ_OP_READ, GFP_NOFS);
@@ -5878,25 +5878,6 @@ static int find_live_mirror(struct btrfs_fs_info *fs_info,
return preferred_mirror;
}
-/* Bubble-sort the stripe set to put the parity/syndrome stripes last */
-static void sort_parity_stripes(struct btrfs_io_context *bioc, int num_stripes)
-{
- int i;
- int again = 1;
-
- while (again) {
- again = 0;
- for (i = 0; i < num_stripes - 1; i++) {
- /* Swap if parity is on a smaller index */
- if (bioc->raid_map[i] > bioc->raid_map[i + 1]) {
- swap(bioc->stripes[i], bioc->stripes[i + 1]);
- swap(bioc->raid_map[i], bioc->raid_map[i + 1]);
- again = 1;
- }
- }
- }
-}
-
static struct btrfs_io_context *alloc_btrfs_io_context(struct btrfs_fs_info *fs_info,
u16 total_stripes)
{
@@ -5906,12 +5887,7 @@ static struct btrfs_io_context *alloc_btrfs_io_context(struct btrfs_fs_info *fs_
/* The size of btrfs_io_context */
sizeof(struct btrfs_io_context) +
/* Plus the variable array for the stripes */
- sizeof(struct btrfs_io_stripe) * (total_stripes) +
- /*
- * Plus the raid_map, which includes both the tgt dev
- * and the stripes.
- */
- sizeof(u64) * (total_stripes),
+ sizeof(struct btrfs_io_stripe) * (total_stripes),
GFP_NOFS);
if (!bioc)
@@ -5920,8 +5896,8 @@ static struct btrfs_io_context *alloc_btrfs_io_context(struct btrfs_fs_info *fs_
refcount_set(&bioc->refs, 1);
bioc->fs_info = fs_info;
- bioc->raid_map = (u64 *)(bioc->stripes + total_stripes);
bioc->replace_stripe_src = -1;
+ bioc->full_stripe_logical = (u64)-1;
return bioc;
}
@@ -6525,33 +6501,39 @@ int __btrfs_map_block(struct btrfs_fs_info *fs_info, enum btrfs_map_op op,
}
bioc->map_type = map->type;
- for (i = 0; i < num_stripes; i++) {
- set_io_stripe(&bioc->stripes[i], map, stripe_index, stripe_offset,
- stripe_nr);
- stripe_index++;
- }
-
- /* Build raid_map */
+ /*
+ * For RAID56 full map, we need to make sure the stripes[] follows the
+ * rule that data stripes are all ordered, then followed with P and Q
+ * (if we have).
+ *
+ * It's still mostly the same as other profiles, just with extra rotation.
+ */
if (map->type & BTRFS_BLOCK_GROUP_RAID56_MASK && need_raid_map &&
(need_full_stripe(op) || mirror_num > 1)) {
- u64 tmp;
- unsigned rot;
-
- /* Work out the disk rotation on this stripe-set */
- rot = stripe_nr % num_stripes;
-
- /* Fill in the logical address of each stripe */
- tmp = stripe_nr * data_stripes;
- for (i = 0; i < data_stripes; i++)
- bioc->raid_map[(i + rot) % num_stripes] =
- em->start + ((tmp + i) << BTRFS_STRIPE_LEN_SHIFT);
-
- bioc->raid_map[(i + rot) % map->num_stripes] = RAID5_P_STRIPE;
- if (map->type & BTRFS_BLOCK_GROUP_RAID6)
- bioc->raid_map[(i + rot + 1) % num_stripes] =
- RAID6_Q_STRIPE;
-
- sort_parity_stripes(bioc, num_stripes);
+ /*
+ * For RAID56 @stripe_nr is already the number of full stripes
+ * before us, which is also the rotation value (needs to modulo
+ * with num_stripes).
+ *
+ * In this case, we just add @stripe_nr with @i, then do the
+ * modulo, to reduce one modulo call.
+ */
+ bioc->full_stripe_logical = em->start +
+ ((stripe_nr * data_stripes) << BTRFS_STRIPE_LEN_SHIFT);
+ for (i = 0; i < num_stripes; i++)
+ set_io_stripe(&bioc->stripes[i], map,
+ (i + stripe_nr) % num_stripes,
+ stripe_offset, stripe_nr);
+ } else {
+ /*
+ * For all other non-RAID56 profiles, just copy the target
+ * stripe into the bioc.
+ */
+ for (i = 0; i < num_stripes; i++) {
+ set_io_stripe(&bioc->stripes[i], map, stripe_index,
+ stripe_offset, stripe_nr);
+ stripe_index++;
+ }
}
if (need_full_stripe(op))
@@ -459,11 +459,22 @@ struct btrfs_io_context {
u16 replace_nr_stripes;
s16 replace_stripe_src;
/*
- * logical block numbers for the start of each stripe
- * The last one or two are p/q. These are sorted,
- * so raid_map[0] is the start of our full stripe
+ * Logical bytenr of the full stripe start, only for RAID56 cases.
+ *
+ * When this value is set to other than (u64)-1, the stripes[] should
+ * follow this pattern:
+ *
+ * (real_stripes = num_stripes - replace_nr_stripes)
+ * (data_stripes = (is_raid6) ? (real_stripes - 2) : (real_stripes - 1))
+ *
+ * stripes[0]: The first data stripe
+ * stripes[1]: The second data stripe
+ * ...
+ * stripes[data_stripes - 1]: The last data stripe
+ * stripes[data_stripes]: The P stripe
+ * stripes[data_stripes + 1]: The Q stripe (only for RAID6).
*/
- u64 *raid_map;
+ u64 full_stripe_logical;
struct btrfs_io_stripe stripes[];
};
@@ -2422,7 +2422,7 @@ DECLARE_EVENT_CLASS(btrfs_raid56_bio,
),
TP_fast_assign_btrfs(rbio->bioc->fs_info,
- __entry->full_stripe = rbio->bioc->raid_map[0];
+ __entry->full_stripe = rbio->bioc->full_stripe_logical;
__entry->physical = bio->bi_iter.bi_sector << SECTOR_SHIFT;
__entry->len = bio->bi_iter.bi_size;
__entry->opf = bio_op(bio);