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| author | Qu Wenruo <wqu@suse.com> | 2017-12-12 15:34:23 +0800 |
|---|---|---|
| committer | David Sterba <dsterba@suse.com> | 2018-03-31 01:41:13 +0200 |
| commit | d4e5c92055d8933e9a2030fcbe6d0dbbec538c58 (patch) | |
| tree | 3c88b2192178f7725c238049693b7f9752de0281 /fs/btrfs/qgroup.h | |
| parent | 0a0d4415e3389b6a2e89896808dea27d2402d154 (diff) | |
| download | linux-d4e5c92055d8933e9a2030fcbe6d0dbbec538c58.tar.gz | |
btrfs: qgroup: Skeleton to support separate qgroup reservation type
Instead of single qgroup->reserved, use a new structure btrfs_qgroup_rsv to store different types of reservation. This patch only updates the header needed to compile. Signed-off-by: Qu Wenruo <wqu@suse.com> Signed-off-by: David Sterba <dsterba@suse.com>
Diffstat (limited to 'fs/btrfs/qgroup.h')
| -rw-r--r-- | fs/btrfs/qgroup.h | 27 |
1 files changed, 25 insertions, 2 deletions
diff --git a/fs/btrfs/qgroup.h b/fs/btrfs/qgroup.h index ad003483d20c..b5ee229b3ef1 100644 --- a/fs/btrfs/qgroup.h +++ b/fs/btrfs/qgroup.h @@ -61,6 +61,26 @@ struct btrfs_qgroup_extent_record { struct ulist *old_roots; }; +enum btrfs_qgroup_rsv_type { + BTRFS_QGROUP_RSV_DATA = 0, + BTRFS_QGROUP_RSV_META, + BTRFS_QGROUP_RSV_LAST, +}; + +/* + * Represents how many bytes we have reserved for this qgroup. + * + * Each type should have different reservation behavior. + * E.g, data follows its io_tree flag modification, while + * *currently* meta is just reserve-and-clear during transcation. + * + * TODO: Add new type for reservation which can survive transaction commit. + * Currect metadata reservation behavior is not suitable for such case. + */ +struct btrfs_qgroup_rsv { + u64 values[BTRFS_QGROUP_RSV_LAST]; +}; + /* * one struct for each qgroup, organized in fs_info->qgroup_tree. */ @@ -88,6 +108,7 @@ struct btrfs_qgroup { * reservation tracking */ u64 reserved; + struct btrfs_qgroup_rsv rsv; /* * lists @@ -227,12 +248,14 @@ int btrfs_qgroup_inherit(struct btrfs_trans_handle *trans, struct btrfs_fs_info *fs_info, u64 srcid, u64 objectid, struct btrfs_qgroup_inherit *inherit); void btrfs_qgroup_free_refroot(struct btrfs_fs_info *fs_info, - u64 ref_root, u64 num_bytes); + u64 ref_root, u64 num_bytes, + enum btrfs_qgroup_rsv_type type); static inline void btrfs_qgroup_free_delayed_ref(struct btrfs_fs_info *fs_info, u64 ref_root, u64 num_bytes) { trace_btrfs_qgroup_free_delayed_ref(fs_info, ref_root, num_bytes); - btrfs_qgroup_free_refroot(fs_info, ref_root, num_bytes); + btrfs_qgroup_free_refroot(fs_info, ref_root, num_bytes, + BTRFS_QGROUP_RSV_DATA); } #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS |