On Fri, Jun 28, 2019 at 10:26:11AM +0800, Anand Jain wrote: > At the time mkfs.btrfs the device id and stripe index gets reversed as > shown in [1]. This patch helps to keep them in order at the time of > mkfs.btrfs. And makes it easier to debug. > > Before: > Stripe 0 is on devid 2; Stipe 1 is on devid 1; > > ./mkfs.btrfs -fq -draid1 -mraid1 /dev/sdb /dev/sdc && btrfs in dump-tree -d /dev/sdb | grep -A 10000 "chunk tree" | grep -B 10000 "device tree" | grep -A 13 "FIRST_CHUNK_TREE CHUNK_ITEM" I've reformatted that so it's not overly long line. For dumps it's ok but a command can be split by && or | . > item 2 key (FIRST_CHUNK_TREE CHUNK_ITEM 22020096) itemoff 15975 itemsize 112 > length 8388608 owner 2 stripe_len 65536 type SYSTEM|RAID1 > io_align 65536 io_width 65536 sector_size 4096 > num_stripes 2 sub_stripes 0 > stripe 0 devid 2 offset 1048576 > dev_uuid d9fe51c4-6e79-446d-87ee-5be3184798cd > stripe 1 devid 1 offset 22020096 > dev_uuid 16f626ca-1a54-469b-ac7e-25623af884ab > item 3 key (FIRST_CHUNK_TREE CHUNK_ITEM 30408704) itemoff 15863 itemsize 112 > length 268435456 owner 2 stripe_len 65536 type METADATA|RAID1 > io_align 65536 io_width 65536 sector_size 4096 > num_stripes 2 sub_stripes 0 > stripe 0 devid 2 offset 9437184 > dev_uuid d9fe51c4-6e79-446d-87ee-5be3184798cd > stripe 1 devid 1 offset 30408704 > dev_uuid 16f626ca-1a54-469b-ac7e-25623af884ab > item 4 key (FIRST_CHUNK_TREE CHUNK_ITEM 298844160) itemoff 15751 itemsize 112 > length 314572800 owner 2 stripe_len 65536 type DATA|RAID1 > io_align 65536 io_width 65536 sector_size 4096 > num_stripes 2 sub_stripes 0 > stripe 0 devid 2 offset 277872640 > dev_uuid d9fe51c4-6e79-446d-87ee-5be3184798cd > stripe 1 devid 1 offset 298844160 > dev_uuid 16f626ca-1a54-469b-ac7e-25623af884ab > > After: > Stripe 0 is on devid 1; Stripe 1 is on devid 2 > > ./mkfs.btrfs -fq -draid1 -mraid1 /dev/sdb /dev/sdc && btrfs in dump-tree -d /dev/sdb | grep -A 10000 "chunk tree" | grep -B 10000 "device tree" | grep -A 13 "FIRST_CHUNK_TREE CHUNK_ITEM" > /dev/sdb: 8 bytes were erased at offset 0x00010040 (btrfs): 5f 42 48 52 66 53 5f 4d > /dev/sdc: 8 bytes were erased at offset 0x00010040 (btrfs): 5f 42 48 52 66 53 5f 4d > item 2 key (FIRST_CHUNK_TREE CHUNK_ITEM 22020096) itemoff 15975 itemsize 112 > length 8388608 owner 2 stripe_len 65536 type SYSTEM|RAID1 > io_align 65536 io_width 65536 sector_size 4096 > num_stripes 2 sub_stripes 0 > stripe 0 devid 1 offset 22020096 > dev_uuid 6abc88fa-f42e-4f0c-9bc3-2225735e51d1 > stripe 1 devid 2 offset 1048576 > dev_uuid 73746d27-13a6-4d58-ac6b-48c90c31d94d > item 3 key (FIRST_CHUNK_TREE CHUNK_ITEM 30408704) itemoff 15863 itemsize 112 > length 268435456 owner 2 stripe_len 65536 type METADATA|RAID1 > io_align 65536 io_width 65536 sector_size 4096 > num_stripes 2 sub_stripes 0 > stripe 0 devid 1 offset 30408704 > dev_uuid 6abc88fa-f42e-4f0c-9bc3-2225735e51d1 > stripe 1 devid 2 offset 9437184 > dev_uuid 73746d27-13a6-4d58-ac6b-48c90c31d94d > item 4 key (FIRST_CHUNK_TREE CHUNK_ITEM 298844160) itemoff 15751 itemsize 112 > length 314572800 owner 2 stripe_len 65536 type DATA|RAID1 > io_align 65536 io_width 65536 sector_size 4096 > num_stripes 2 sub_stripes 0 > stripe 0 devid 1 offset 298844160 > dev_uuid 6abc88fa-f42e-4f0c-9bc3-2225735e51d1 > stripe 1 devid 2 offset 277872640 > dev_uuid 73746d27-13a6-4d58-ac6b-48c90c31d94d > > Signed-off-by: Anand Jain <anand.jain@xxxxxxxxxx> Added to devel, thanks.
