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authorZhao Lei <zhaolei@cn.fujitsu.com>2015-01-20 15:11:43 +0800
committerChris Mason <clm@fb.com>2015-01-21 18:06:49 -0800
commit10f11900167a83e0c229c4c27e73e720ebd55b5c (patch)
treeab1a3b7bd34f51ea09ef505ed518423332f53a99 /fs/btrfs
parentbe50a8ddaae1d07135fd7e1c7017c1611075a560 (diff)
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.c10
-rw-r--r--fs/btrfs/scrub.c28
-rw-r--r--fs/btrfs/volumes.c1
-rw-r--r--fs/btrfs/volumes.h1
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;