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btrfs: zoned: handle RAID profiles in btrfs_can_activate_zone()

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btrfs_can_activate_zone() only accounts for the single and DUP profiles.
For a RAID0, RAID1, RAID1C3, RAID1C4 or RAID10 block group the profile
switch matches no case, so 'ret' stays false and the function reports
that no zone can be activated, even when the devices have plenty of
active zones left.

As a side effect BTRFS_FS_NEED_ZONE_FINISH gets set and, since
btrfs_can_activate_zone() bails out early once that bit is set, data
allocations will fail permanently: writers loop on -EAGAIN and hang in
btrfs_new_extent_direct() waiting for the bit to clear.

Each of these profiles needs one active zone per device, just like
single, so handle them the same way.

Reviewed-by: Boris Burkov <boris@bur.io>
Signed-off-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
Johannes Thumshirn 2026-08-24 18:19:10 +02:00 committed by David Sterba
parent 09f1294ee2
commit 3a35e787ac
1 changed files with 5 additions and 0 deletions
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5
fs/btrfs/zoned.c
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@ -2688,6 +2688,11 @@ bool btrfs_can_activate_zone(struct btrfs_fs_devices *fs_devices, u64 flags)
switch (flags & BTRFS_BLOCK_GROUP_PROFILE_MASK) {
case 0: /* single */
case BTRFS_BLOCK_GROUP_RAID0:
case BTRFS_BLOCK_GROUP_RAID1:
case BTRFS_BLOCK_GROUP_RAID1C3:
case BTRFS_BLOCK_GROUP_RAID1C4:
case BTRFS_BLOCK_GROUP_RAID10:
ret = (atomic_read(&zinfo->active_zones_left) >= (1 + reserved));
break;
case BTRFS_BLOCK_GROUP_DUP: