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| author | Anand Jain <Anand.Jain@oracle.com> | 2017-12-18 17:08:59 +0800 |
|---|---|---|
| committer | David Sterba <dsterba@suse.com> | 2018-01-22 16:08:20 +0100 |
| commit | 6528b99d3d20795ff947d9b3fd736affe901acef (patch) | |
| tree | e184957907d6a57cd0c1b53e193e07b9e39ea352 /fs/btrfs/volumes.c | |
| parent | e43bbe5e16d87b40f3b382b3a43b0142d6d1193d (diff) | |
| download | linux-6528b99d3d20795ff947d9b3fd736affe901acef.tar.bz2 | |
btrfs: factor btrfs_check_rw_degradable() to check given device
Update btrfs_check_rw_degradable() to check against the given device if
its lost.
We can use this function to know if the volume is going to be in
degraded mode OR failed state, when the given device fails. Which is
needed when we are handling the device failed state.
A preparatory patch does not affect the flow as such.
Signed-off-by: Anand Jain <anand.jain@oracle.com>
Reviewed-by: Qu Wenruo <wqu@suse.com>
[ enhance comment ]
Signed-off-by: David Sterba <dsterba@suse.com>
Diffstat (limited to 'fs/btrfs/volumes.c')
| -rw-r--r-- | fs/btrfs/volumes.c | 10 |
1 files changed, 8 insertions, 2 deletions
diff --git a/fs/btrfs/volumes.c b/fs/btrfs/volumes.c index 9a04245003ab..f85991a2585c 100644 --- a/fs/btrfs/volumes.c +++ b/fs/btrfs/volumes.c @@ -6851,10 +6851,13 @@ out_short_read: /* * Check if all chunks in the fs are OK for read-write degraded mount * + * If the @failing_dev is specified, it's accounted as missing. + * * Return true if all chunks meet the minimal RW mount requirements. * Return false if any chunk doesn't meet the minimal RW mount requirements. */ -bool btrfs_check_rw_degradable(struct btrfs_fs_info *fs_info) +bool btrfs_check_rw_degradable(struct btrfs_fs_info *fs_info, + struct btrfs_device *failing_dev) { struct btrfs_mapping_tree *map_tree = &fs_info->mapping_tree; struct extent_map *em; @@ -6886,9 +6889,12 @@ bool btrfs_check_rw_degradable(struct btrfs_fs_info *fs_info) test_bit(BTRFS_DEV_STATE_MISSING, &dev->dev_state) || dev->last_flush_error) missing++; + else if (failing_dev && failing_dev == dev) + missing++; } if (missing > max_tolerated) { - btrfs_warn(fs_info, + if (!failing_dev) + btrfs_warn(fs_info, "chunk %llu missing %d devices, max tolerance is %d for writeable mount", em->start, missing, max_tolerated); free_extent_map(em); |