From 9d220c95f5191f6e99fbb992d5f36a929d3fc432 Mon Sep 17 00:00:00 2001 From: Qu Wenruo Date: Mon, 13 Apr 2015 11:02:16 +0800 Subject: [PATCH] btrfs: qgroup: Switch rescan to new mechanism. Switch rescan to use the new new extent oriented mechanism. As rescan is also based on extent, new mechanism is just a perfect match for rescan. With re-designed internal functions, rescan is quite easy, just call btrfs_find_all_roots() and then btrfs_qgroup_account_one_extent(). Signed-off-by: Qu Wenruo Signed-off-by: Chris Mason --- fs/btrfs/qgroup.c | 43 +++++++------------------------------------ 1 file changed, 7 insertions(+), 36 deletions(-) diff --git a/fs/btrfs/qgroup.c b/fs/btrfs/qgroup.c index 607c6ca..70c366f 100644 --- a/fs/btrfs/qgroup.c +++ b/fs/btrfs/qgroup.c @@ -3002,15 +3002,13 @@ void assert_qgroups_uptodate(struct btrfs_trans_handle *trans) */ static int qgroup_rescan_leaf(struct btrfs_fs_info *fs_info, struct btrfs_path *path, - struct btrfs_trans_handle *trans, struct ulist *qgroups, - struct ulist *tmp, struct extent_buffer *scratch_leaf) + struct btrfs_trans_handle *trans, + struct extent_buffer *scratch_leaf) { struct btrfs_key found; struct ulist *roots = NULL; struct seq_list tree_mod_seq_elem = SEQ_LIST_INIT(tree_mod_seq_elem); u64 num_bytes; - u64 seq; - int new_roots; int slot; int ret; @@ -3060,33 +3058,15 @@ qgroup_rescan_leaf(struct btrfs_fs_info *fs_info, struct btrfs_path *path, else num_bytes = found.offset; - ulist_reinit(qgroups); ret = btrfs_find_all_roots(NULL, fs_info, found.objectid, 0, &roots); if (ret < 0) goto out; - spin_lock(&fs_info->qgroup_lock); - seq = fs_info->qgroup_seq; - fs_info->qgroup_seq += roots->nnodes + 1; /* max refcnt */ - - new_roots = 0; - ret = qgroup_calc_old_refcnt(fs_info, 0, tmp, roots, qgroups, - seq, &new_roots, 1); - if (ret < 0) { - spin_unlock(&fs_info->qgroup_lock); - ulist_free(roots); - goto out; - } - - ret = qgroup_adjust_counters(fs_info, 0, num_bytes, qgroups, - seq, 0, new_roots, 1); - if (ret < 0) { - spin_unlock(&fs_info->qgroup_lock); - ulist_free(roots); + /* For rescan, just pass old_roots as NULL */ + ret = btrfs_qgroup_account_extent(trans, fs_info, + found.objectid, num_bytes, NULL, roots); + if (ret < 0) goto out; - } - spin_unlock(&fs_info->qgroup_lock); - ulist_free(roots); } out: btrfs_put_tree_mod_seq(fs_info, &tree_mod_seq_elem); @@ -3100,7 +3080,6 @@ static void btrfs_qgroup_rescan_worker(struct btrfs_work *work) qgroup_rescan_work); struct btrfs_path *path; struct btrfs_trans_handle *trans = NULL; - struct ulist *tmp = NULL, *qgroups = NULL; struct extent_buffer *scratch_leaf = NULL; int err = -ENOMEM; int ret = 0; @@ -3108,12 +3087,6 @@ static void btrfs_qgroup_rescan_worker(struct btrfs_work *work) path = btrfs_alloc_path(); if (!path) goto out; - qgroups = ulist_alloc(GFP_NOFS); - if (!qgroups) - goto out; - tmp = ulist_alloc(GFP_NOFS); - if (!tmp) - goto out; scratch_leaf = kmalloc(sizeof(*scratch_leaf), GFP_NOFS); if (!scratch_leaf) goto out; @@ -3129,7 +3102,7 @@ static void btrfs_qgroup_rescan_worker(struct btrfs_work *work) err = -EINTR; } else { err = qgroup_rescan_leaf(fs_info, path, trans, - qgroups, tmp, scratch_leaf); + scratch_leaf); } if (err > 0) btrfs_commit_transaction(trans, fs_info->fs_root); @@ -3139,8 +3112,6 @@ static void btrfs_qgroup_rescan_worker(struct btrfs_work *work) out: kfree(scratch_leaf); - ulist_free(qgroups); - ulist_free(tmp); btrfs_free_path(path); mutex_lock(&fs_info->qgroup_rescan_lock); -- 2.7.4