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btrfs-progs: mkfs: match devid order to the stripe index 

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"
	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@oracle.com>
Reviewed-by: Qu Wenruo <wqu@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
master
Anand Jain 2019-06-28 10:26:11 +08:00 committed by David Sterba
parent 3de68a0e87
commit c501c9e3b8
1 changed files with 2 additions and 2 deletions
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4
volumes.c
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@ -1109,7 +1109,7 @@ again:
return ret;
cur = cur->next;
if (avail >= min_free) {
list_move_tail(&device->dev_list, &private_devs);
list_move(&device->dev_list, &private_devs);
index++;
if (type & BTRFS_BLOCK_GROUP_DUP)
index++;
@ -1166,7 +1166,7 @@ again:
/* loop over this device again if we're doing a dup group */
if (!(type & BTRFS_BLOCK_GROUP_DUP) ||
(index == num_stripes - 1))
list_move_tail(&device->dev_list, dev_list);
list_move(&device->dev_list, dev_list);
ret = btrfs_alloc_dev_extent(trans, device, key.offset,
calc_size, &dev_offset);