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| author | Qu Wenruo <wqu@suse.com> | 2020-06-28 13:07:15 +0800 |
|---|---|---|
| committer | David Sterba <dsterba@suse.com> | 2020-07-27 12:55:37 +0200 |
| commit | 49e5fb46211de0744170928466e68166eabbd8b3 (patch) | |
| tree | d46a857d6495925542479ff60df0257f07a1b324 /fs/btrfs/ctree.h | |
| parent | 06f67c47076e5c3ee65276171596479dcc3a3941 (diff) | |
btrfs: qgroup: export qgroups in sysfs
This patch will add the following sysfs interface:
/sys/fs/btrfs/<UUID>/qgroups/<qgroup_id>/referenced
/sys/fs/btrfs/<UUID>/qgroups/<qgroup_id>/exclusive
/sys/fs/btrfs/<UUID>/qgroups/<qgroup_id>/max_referenced
/sys/fs/btrfs/<UUID>/qgroups/<qgroup_id>/max_exclusive
/sys/fs/btrfs/<UUID>/qgroups/<qgroup_id>/limit_flags
Which is also available in output of "btrfs qgroup show".
/sys/fs/btrfs/<UUID>/qgroups/<qgroup_id>/rsv_data
/sys/fs/btrfs/<UUID>/qgroups/<qgroup_id>/rsv_meta_pertrans
/sys/fs/btrfs/<UUID>/qgroups/<qgroup_id>/rsv_meta_prealloc
The last 3 rsv related members are not visible to users, but can be very
useful to debug qgroup limit related bugs.
Also, to avoid '/' used in <qgroup_id>, the separator between qgroup
level and qgroup id is changed to '_'.
The interface is not hidden behind 'debug' as we want this interface to
be included into production build and to provide another way to read the
qgroup information besides the ioctls.
Signed-off-by: Qu Wenruo <wqu@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Diffstat (limited to 'fs/btrfs/ctree.h')
| -rw-r--r-- | fs/btrfs/ctree.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/fs/btrfs/ctree.h b/fs/btrfs/ctree.h index 0ea3d89beb26..2b0d95a4b0da 100644 --- a/fs/btrfs/ctree.h +++ b/fs/btrfs/ctree.h @@ -779,6 +779,7 @@ struct btrfs_fs_info { u32 thread_pool_size; struct kobject *space_info_kobj; + struct kobject *qgroups_kobj; u64 total_pinned; |