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btrfs: zoned: use regular writes for relocation 

Now that we have a dedicated block group for relocation, we can use
REQ_OP_WRITE instead of  REQ_OP_ZONE_APPEND for writing out the data on
relocation.

Reviewed-by: Naohiro Aota <naohiro.aota@wdc.com>
Signed-off-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
Johannes Thumshirn 2021-09-09 01:19:28 +09:00 committed by David Sterba
parent 35156d8527
commit e6d261e3b1
1 changed files with 11 additions and 0 deletions
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11
fs/btrfs/zoned.c
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@ -1490,6 +1490,17 @@ bool btrfs_use_zone_append(struct btrfs_inode *inode, u64 start)
if (!is_data_inode(&inode->vfs_inode))
return false;
/*
* Using REQ_OP_ZONE_APPNED for relocation can break assumptions on the
* extent layout the relocation code has.
* Furthermore we have set aside own block-group from which only the
* relocation "process" can allocate and make sure only one process at a
* time can add pages to an extent that gets relocated, so it's safe to
* use regular REQ_OP_WRITE for this special case.
*/
if (btrfs_is_data_reloc_root(inode->root))
return false;
cache = btrfs_lookup_block_group(fs_info, start);
ASSERT(cache);
if (!cache)