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| author | Anand Jain <anand.jain@oracle.com> | 2021-10-05 16:12:40 -0400 |
|---|---|---|
| committer | David Sterba <dsterba@suse.com> | 2021-10-26 19:08:06 +0200 |
| commit | add9745adc2fa13e6a6e2c26c78dcb05da031a44 (patch) | |
| tree | 9b868ae84e7d0168826c330e84697950cbc41807 /fs/btrfs/volumes.h | |
| parent | 8e906945c069fbc9377f2748a661ac06d039ea77 (diff) | |
| download | lwn-add9745adc2fa13e6a6e2c26c78dcb05da031a44.tar.gz lwn-add9745adc2fa13e6a6e2c26c78dcb05da031a44.zip | |
btrfs: add comments for device counts in struct btrfs_fs_devices
A bug was was checking a wrong device count before we delete the struct
btrfs_fs_devices in btrfs_rm_device(). To avoid future confusion and
easy reference add a comment about the various device counts that we have
in the struct btrfs_fs_devices.
Signed-off-by: Anand Jain <anand.jain@oracle.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Diffstat (limited to 'fs/btrfs/volumes.h')
| -rw-r--r-- | fs/btrfs/volumes.h | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/fs/btrfs/volumes.h b/fs/btrfs/volumes.h index 49322a43593a..874406f51b86 100644 --- a/fs/btrfs/volumes.h +++ b/fs/btrfs/volumes.h @@ -236,11 +236,30 @@ struct btrfs_fs_devices { bool fsid_change; struct list_head fs_list; + /* + * Number of devices under this fsid including missing and + * replace-target device and excludes seed devices. + */ u64 num_devices; + + /* + * The number of devices that successfully opened, including + * replace-target, excludes seed devices. + */ u64 open_devices; + + /* The number of devices that are under the chunk allocation list. */ u64 rw_devices; + + /* Count of missing devices under this fsid excluding seed device. */ u64 missing_devices; u64 total_rw_bytes; + + /* + * Count of devices from btrfs_super_block::num_devices for this fsid, + * which includes the seed device, excludes the transient replace-target + * device. + */ u64 total_devices; /* Highest generation number of seen devices */ |