From: David Sterba <dsterba@suse.com>
To: linux-btrfs@vger.kernel.org
Cc: David Sterba <dsterba@suse.com>
Subject: [PATCH 08/15] btrfs: use raid_attr table to find profiles for integrity lowering
Date: Fri, 17 May 2019 11:43:29 +0200 [thread overview]
Message-ID: <012ba0ba1f25b1ee453cc9ebe76be1202b169ee5.1558085801.git.dsterba@suse.com> (raw)
In-Reply-To: <cover.1558085801.git.dsterba@suse.com>
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>
---
fs/btrfs/volumes.c | 15 ++++++++++-----
1 file changed, 10 insertions(+), 5 deletions(-)
diff --git a/fs/btrfs/volumes.c b/fs/btrfs/volumes.c
index 34e4d2269802..9bcda2d76a33 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);
--
2.21.0
next prev parent reply other threads:[~2019-05-17 9:42 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-05-17 9:43 [PATCH 00/15] RAID/volumes code cleanups David Sterba
2019-05-17 9:43 ` [PATCH 01/15] btrfs: fix minimum number of chunk errors for DUP David Sterba
2019-05-17 14:05 ` Qu Wenruo
2019-05-17 9:43 ` [PATCH 02/15] btrfs: raid56: allow the exact minimum number of devices for balance convert David Sterba
2019-05-17 9:43 ` [PATCH 03/15] btrfs: remove mapping tree structures indirection David Sterba
2019-05-17 9:43 ` [PATCH 04/15] btrfs: use raid_attr table in get_profile_num_devs David Sterba
2019-05-17 9:43 ` [PATCH 05/15] btrfs: use raid_attr in btrfs_chunk_max_errors David Sterba
2019-05-17 9:43 ` [PATCH 06/15] btrfs: use raid_attr table in calc_stripe_length for nparity David Sterba
2019-05-17 10:06 ` Hans van Kranenburg
2019-05-17 12:54 ` David Sterba
2019-05-17 13:06 ` Hans van Kranenburg
2019-05-17 9:43 ` [PATCH 07/15] btrfs: use raid_attr to get allowed profiles for balance conversion David Sterba
2019-05-17 9:43 ` David Sterba [this message]
2019-05-17 9:43 ` [PATCH 09/15] btrfs: use raid_attr table for btrfs_bg_type_to_factor David Sterba
2019-05-17 9:43 ` [PATCH 10/15] btrfs: factor out helper for counting data stripes David Sterba
2019-05-17 9:43 ` [PATCH 11/15] btrfs: use u8 for raid_array members David Sterba
2019-05-17 9:43 ` [PATCH 12/15] btrfs: factor out devs_max setting in __btrfs_alloc_chunk David Sterba
2019-05-17 9:43 ` [PATCH 13/15] btrfs: refactor helper for bg flags to name conversion David Sterba
2019-05-17 9:43 ` [PATCH 14/15] btrfs: constify map parameter for nr_parity_stripes and nr_data_stripes David Sterba
2019-05-17 9:43 ` [PATCH 15/15] btrfs: read number of data stripes from map only once David Sterba
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