diff options
author | Zhao Lei <zhaolei@cn.fujitsu.com> | 2015-01-20 15:11:43 +0800 |
---|---|---|
committer | Chris Mason <clm@fb.com> | 2015-01-21 18:06:49 -0800 |
commit | 10f11900167a83e0c229c4c27e73e720ebd55b5c (patch) | |
tree | ab1a3b7bd34f51ea09ef505ed518423332f53a99 /fs/btrfs | |
parent | be50a8ddaae1d07135fd7e1c7017c1611075a560 (diff) | |
download | linux-10f11900167a83e0c229c4c27e73e720ebd55b5c.tar.bz2 |
Btrfs: Include map_type in raid_bio
Corrent code use many kinds of "clever" way to determine operation
target's raid type, as:
raid_map != NULL
or
raid_map[MAX_NR] == RAID[56]_Q_STRIPE
To make code easy to maintenance, this patch put raid type into
bbio, and we can always get raid type from bbio with a "stupid"
way.
Signed-off-by: Zhao Lei <zhaolei@cn.fujitsu.com>
Signed-off-by: Miao Xie <miaox@cn.fujitsu.com>
Signed-off-by: Chris Mason <clm@fb.com>
Diffstat (limited to 'fs/btrfs')
-rw-r--r-- | fs/btrfs/raid56.c | 10 | ||||
-rw-r--r-- | fs/btrfs/scrub.c | 28 | ||||
-rw-r--r-- | fs/btrfs/volumes.c | 1 | ||||
-rw-r--r-- | fs/btrfs/volumes.h | 1 |
4 files changed, 22 insertions, 18 deletions
diff --git a/fs/btrfs/raid56.c b/fs/btrfs/raid56.c index cbc416204452..5264858ed768 100644 --- a/fs/btrfs/raid56.c +++ b/fs/btrfs/raid56.c @@ -994,10 +994,12 @@ static struct btrfs_raid_bio *alloc_rbio(struct btrfs_root *root, rbio->bio_pages = p + sizeof(struct page *) * num_pages; rbio->dbitmap = p + sizeof(struct page *) * num_pages * 2; - if (bbio->raid_map[real_stripes - 1] == RAID6_Q_STRIPE) + if (bbio->map_type & BTRFS_BLOCK_GROUP_RAID5) + nr_data = real_stripes - 1; + else if (bbio->map_type & BTRFS_BLOCK_GROUP_RAID6) nr_data = real_stripes - 2; else - nr_data = real_stripes - 1; + BUG(); rbio->nr_data = nr_data; return rbio; @@ -1850,9 +1852,7 @@ static void __raid_recover_end_io(struct btrfs_raid_bio *rbio) } /* all raid6 handling here */ - if (rbio->bbio->raid_map[rbio->real_stripes - 1] == - RAID6_Q_STRIPE) { - + if (rbio->bbio->map_type & BTRFS_BLOCK_GROUP_RAID6) { /* * single failure, rebuild from parity raid5 * style diff --git a/fs/btrfs/scrub.c b/fs/btrfs/scrub.c index c3a98931980f..19781e924443 100644 --- a/fs/btrfs/scrub.c +++ b/fs/btrfs/scrub.c @@ -1256,19 +1256,16 @@ out: static inline int scrub_nr_raid_mirrors(struct btrfs_bio *bbio) { - if (bbio->raid_map) { - int real_stripes = bbio->num_stripes - bbio->num_tgtdevs; - - if (bbio->raid_map[real_stripes - 1] == RAID6_Q_STRIPE) - return 3; - else - return 2; - } else { + if (bbio->map_type & BTRFS_BLOCK_GROUP_RAID5) + return 2; + else if (bbio->map_type & BTRFS_BLOCK_GROUP_RAID6) + return 3; + else return (int)bbio->num_stripes; - } } -static inline void scrub_stripe_index_and_offset(u64 logical, u64 *raid_map, +static inline void scrub_stripe_index_and_offset(u64 logical, u64 map_type, + u64 *raid_map, u64 mapped_length, int nstripes, int mirror, int *stripe_index, @@ -1276,7 +1273,7 @@ static inline void scrub_stripe_index_and_offset(u64 logical, u64 *raid_map, { int i; - if (raid_map) { + if (map_type & (BTRFS_BLOCK_GROUP_RAID5 | BTRFS_BLOCK_GROUP_RAID6)) { /* RAID5/6 */ for (i = 0; i < nstripes; i++) { if (raid_map[i] == RAID6_Q_STRIPE || @@ -1350,6 +1347,7 @@ static int scrub_setup_recheck_block(struct scrub_block *original_sblock, BUG_ON(page_index >= SCRUB_PAGES_PER_RD_BIO); nmirrors = min(scrub_nr_raid_mirrors(bbio), BTRFS_MAX_MIRRORS); + for (mirror_index = 0; mirror_index < nmirrors; mirror_index++) { struct scrub_block *sblock; @@ -1370,7 +1368,9 @@ leave_nomem: sblock->pagev[page_index] = page; page->logical = logical; - scrub_stripe_index_and_offset(logical, bbio->raid_map, + scrub_stripe_index_and_offset(logical, + bbio->map_type, + bbio->raid_map, mapped_length, bbio->num_stripes - bbio->num_tgtdevs, @@ -1419,7 +1419,9 @@ static void scrub_bio_wait_endio(struct bio *bio, int error) static inline int scrub_is_page_on_raid56(struct scrub_page *page) { - return page->recover && page->recover->bbio->raid_map; + return page->recover && + (page->recover->bbio->map_type & (BTRFS_BLOCK_GROUP_RAID5 | + BTRFS_BLOCK_GROUP_RAID6)); } static int scrub_submit_raid56_bio_wait(struct btrfs_fs_info *fs_info, diff --git a/fs/btrfs/volumes.c b/fs/btrfs/volumes.c index 0843bcd6304c..8933d70c3d53 100644 --- a/fs/btrfs/volumes.c +++ b/fs/btrfs/volumes.c @@ -5453,6 +5453,7 @@ static int __btrfs_map_block(struct btrfs_fs_info *fs_info, int rw, } *bbio_ret = bbio; + bbio->map_type = map->type; bbio->num_stripes = num_stripes; bbio->max_errors = max_errors; bbio->mirror_num = mirror_num; diff --git a/fs/btrfs/volumes.h b/fs/btrfs/volumes.h index 4313e8ff91e5..83069dec6898 100644 --- a/fs/btrfs/volumes.h +++ b/fs/btrfs/volumes.h @@ -298,6 +298,7 @@ struct btrfs_bio { atomic_t refs; atomic_t stripes_pending; struct btrfs_fs_info *fs_info; + u64 map_type; /* get from map_lookup->type */ bio_end_io_t *end_io; struct bio *orig_bio; unsigned long flags; |