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| author |   David Sterba <dsterba@suse.com> | 2019-05-17 11:43:29 +0200 |
|---|---|---|
| committer | David Sterba <dsterba@suse.com> | 2019-07-01 13:34:57 +0200 |
| commit | 6079e12cdb8f9afb02b9f4f3e4d13c076e1e99e9 (patch) | |
| tree | 6351e4bb7109aced1f2d208bbdf0fe02ef340775 /fs/btrfs | |
| parent | btrfs: use raid_attr to get allowed profiles for balance conversion (diff) | |
| download | linux-dev-6079e12cdb8f9afb02b9f4f3e4d13c076e1e99e9.tar.xz linux-dev-6079e12cdb8f9afb02b9f4f3e4d13c076e1e99e9.zip | |
btrfs: use raid_attr table to find profiles for integrity lowering
Replace open coded list of the profiles by selecting them from the
raid_attr table. The criteria are now more explicit, we need profiles
that have more than 1 copy of the data or can reconstruct the data with
a missing device.
Signed-off-by: David Sterba <dsterba@suse.com>
Diffstat (limited to 'fs/btrfs')
| -rw-r--r-- | fs/btrfs/volumes.c | 15 |
1 files changed, 10 insertions, 5 deletions
diff --git a/fs/btrfs/volumes.c b/fs/btrfs/volumes.c index 301e60b11dd0..71add22e041a 100644 --- a/fs/btrfs/volumes.c +++ b/fs/btrfs/volumes.c @@ -4110,11 +4110,16 @@ int btrfs_balance(struct btrfs_fs_info *fs_info, goto out; } - /* allow to reduce meta or sys integrity only if force set */ - allowed = BTRFS_BLOCK_GROUP_DUP | BTRFS_BLOCK_GROUP_RAID1 | - BTRFS_BLOCK_GROUP_RAID10 | - BTRFS_BLOCK_GROUP_RAID5 | - BTRFS_BLOCK_GROUP_RAID6; + /* + * Allow to reduce metadata or system integrity only if force set for + * profiles with redundancy (copies, parity) + */ + allowed = 0; + for (i = 0; i < ARRAY_SIZE(btrfs_raid_array); i++) { + if (btrfs_raid_array[i].ncopies >= 2 || + btrfs_raid_array[i].tolerated_failures >= 1) + allowed |= btrfs_raid_array[i].bg_flag; + } do { seq = read_seqbegin(&fs_info->profiles_lock); |