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| author |   Johannes Thumshirn <johannes.thumshirn@wdc.com> | 2022-01-26 05:46:23 -0800 |
|---|---|---|
| committer |   David Sterba <dsterba@suse.com> | 2022-03-14 13:13:49 +0100 |
| commit | 265f7237dd258e1d4d0b3f84ffea92d7d1c08861 (patch) | |
| tree | 6ba3a8313eed76f625364e9d34ea888fa88d144f | |
| parent | btrfs: zoned: prepare for allowing DUP on zoned (diff) | |
| download | linux-dev-265f7237dd258e1d4d0b3f84ffea92d7d1c08861.tar.xz linux-dev-265f7237dd258e1d4d0b3f84ffea92d7d1c08861.zip | |
btrfs: zoned: allow DUP on meta-data block groups
Allow creating or reading block-groups on a zoned device with DUP as a
meta-data profile.
This works because we're using the zoned_meta_io_lock and REQ_OP_WRITE
operations for meta-data on zoned btrfs, so all writes to meta-data zones
are aligned to the zone's write-pointer.
Upon loading of the block-group, it is ensured both zones do have the same
zone capacity and write-pointer offsets, so no extra machinery is needed
to keep the write-pointers in sync for the meta-data zones. If this
prerequisite is not met, loading of the block-group is refused.
Signed-off-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Signed-off-by: David Sterba <dsterba@suse.com>
| -rw-r--r-- | fs/btrfs/zoned.c | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/fs/btrfs/zoned.c b/fs/btrfs/zoned.c index 4f6f7afaa5a2..3aad1970ee43 100644 --- a/fs/btrfs/zoned.c +++ b/fs/btrfs/zoned.c @@ -1419,6 +1419,42 @@ int btrfs_load_block_group_zone_info(struct btrfs_block_group *cache, bool new) cache->zone_is_active = test_bit(0, active); break; case BTRFS_BLOCK_GROUP_DUP: + if (map->type & BTRFS_BLOCK_GROUP_DATA) { + btrfs_err(fs_info, "zoned: profile DUP not yet supported on data bg"); + ret = -EINVAL; + goto out; + } + if (alloc_offsets[0] == WP_MISSING_DEV) { + btrfs_err(fs_info, + "zoned: cannot recover write pointer for zone %llu", + physical[0]); + ret = -EIO; + goto out; + } + if (alloc_offsets[1] == WP_MISSING_DEV) { + btrfs_err(fs_info, + "zoned: cannot recover write pointer for zone %llu", + physical[1]); + ret = -EIO; + goto out; + } + if (alloc_offsets[0] != alloc_offsets[1]) { + btrfs_err(fs_info, + "zoned: write pointer offset mismatch of zones in DUP profile"); + ret = -EIO; + goto out; + } + if (test_bit(0, active) != test_bit(1, active)) { + if (!btrfs_zone_activate(cache)) { + ret = -EIO; + goto out; + } + } else { + cache->zone_is_active = test_bit(0, active); + } + cache->alloc_offset = alloc_offsets[0]; + cache->zone_capacity = min(caps[0], caps[1]); + break; case BTRFS_BLOCK_GROUP_RAID1: case BTRFS_BLOCK_GROUP_RAID0: case BTRFS_BLOCK_GROUP_RAID10: |