Btrfs: qgroup state and initialization

Add state to fs_info.

Signed-off-by: Arne Jansen <sensille@gmx.net>

2 files changed, 31 insertions, 0 deletions

diff --git a/fs/btrfs/ctree.h b/fs/btrfs/ctree.h
index 27cf995564ed..a5269d4a164f 100644
--- a/fs/btrfs/ctree.h
+++ b/fs/btrfs/ctree.h
@@ -1120,6 +1120,7 @@ struct btrfs_fs_info {
         struct btrfs_root *dev_root;
         struct btrfs_root *fs_root;
         struct btrfs_root *csum_root;
+        struct btrfs_root *quota_root;
 
         /* the log root tree is a directory of all the other log roots */
         struct btrfs_root *log_root_tree;
@@ -1374,6 +1375,29 @@ struct btrfs_fs_info {
 #ifdef CONFIG_BTRFS_FS_CHECK_INTEGRITY
         u32 check_integrity_print_mask;
 #endif
+        /*
+         * quota information
+         */
+        unsigned int quota_enabled:1;
+
+        /*
+         * quota_enabled only changes state after a commit. This holds the
+         * next state.
+         */
+        unsigned int pending_quota_state:1;
+
+        /* is qgroup tracking in a consistent state? */
+        u64 qgroup_flags;
+
+        /* holds configuration and tracking. Protected by qgroup_lock */
+        struct rb_root qgroup_tree;
+        spinlock_t qgroup_lock;
+
+        /* list of dirty qgroups to be written at next commit */
+        struct list_head dirty_qgroups;
+
+        /* used by btrfs_qgroup_record_ref for an efficient tree traversal */
+        u64 qgroup_seq;
 
         /* filesystem state */
         u64 fs_state;
diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c
index 6fc243eccffa..eca054974425 100644
--- a/fs/btrfs/disk-io.c
+++ b/fs/btrfs/disk-io.c
@@ -2110,6 +2110,13 @@ int open_ctree(struct super_block *sb,
         init_rwsem(&fs_info->cleanup_work_sem);
         init_rwsem(&fs_info->subvol_sem);
 
+        spin_lock_init(&fs_info->qgroup_lock);
+        fs_info->qgroup_tree = RB_ROOT;
+        INIT_LIST_HEAD(&fs_info->dirty_qgroups);
+        fs_info->qgroup_seq = 1;
+        fs_info->quota_enabled = 0;
+        fs_info->pending_quota_state = 0;
+
         btrfs_init_free_cluster(&fs_info->meta_alloc_cluster);
         btrfs_init_free_cluster(&fs_info->data_alloc_cluster);