[PATCH V2 07/10] block-progs: block_group: add dirty_bgs list related memebers

[damenly.su@gmail.com]

From: Su Yue <Damenly_Su@gmx.com>

The old style uses extent bit BLOCK_GROUP_DIRTY to mark dirty block
groups in extent cache. To replace it, add btrfs_trans_handle::dirty_bgs
and btrfs_block_group_cache::dirty_list.

Signed-off-by: Su Yue <Damenly_Su@gmx.com>
Reviewed-by: Qu Wenruo <wqu@suse.com>
---
 ctree.h       | 3 +++
 extent-tree.c | 4 ++++
 transaction.c | 1 +
 transaction.h | 3 ++-
 4 files changed, 10 insertions(+), 1 deletion(-)

diff --git a/ctree.h b/ctree.h
index f3f5f52f2559..61ce53c46302 100644
--- a/ctree.h
+++ b/ctree.h
@@ -1119,6 +1119,9 @@ struct btrfs_block_group_cache {
 
 	/* Block group cache stuff */
 	struct rb_node cache_node;
+
+	/* For dirty block groups */
+	struct list_head dirty_list;
 };
 
 struct btrfs_device;
diff --git a/extent-tree.c b/extent-tree.c
index 9e681273d4b8..615d823ec4de 100644
--- a/extent-tree.c
+++ b/extent-tree.c
@@ -2814,6 +2814,8 @@ static int read_one_block_group(struct btrfs_fs_info *fs_info,
 	cache->pinned = 0;
 	cache->flags = btrfs_block_group_flags(&bgi);
 	cache->used = btrfs_block_group_used(&bgi);
+	INIT_LIST_HEAD(&cache->dirty_list);
+
 	if (cache->flags & BTRFS_BLOCK_GROUP_DATA) {
 		bit = BLOCK_GROUP_DATA;
 	} else if (cache->flags & BTRFS_BLOCK_GROUP_SYSTEM) {
@@ -2895,6 +2897,7 @@ btrfs_add_block_group(struct btrfs_fs_info *fs_info, u64 bytes_used, u64 type,
 	cache->key.type = BTRFS_BLOCK_GROUP_ITEM_KEY;
 	cache->used = bytes_used;
 	cache->flags = type;
+	INIT_LIST_HEAD(&cache->dirty_list);
 
 	exclude_super_stripes(fs_info, cache);
 	ret = update_space_info(fs_info, cache->flags, size, bytes_used,
@@ -2992,6 +2995,7 @@ int btrfs_make_block_groups(struct btrfs_trans_handle *trans,
 		cache->key.type = BTRFS_BLOCK_GROUP_ITEM_KEY;
 		cache->used = 0;
 		cache->flags = group_type;
+		INIT_LIST_HEAD(&cache->dirty_list);
 
 		ret = update_space_info(fs_info, group_type, group_size,
 					0, &cache->space_info);
diff --git a/transaction.c b/transaction.c
index c9035c765a74..269e52c01d29 100644
--- a/transaction.c
+++ b/transaction.c
@@ -52,6 +52,7 @@ struct btrfs_trans_handle* btrfs_start_transaction(struct btrfs_root *root,
 	root->last_trans = h->transid;
 	root->commit_root = root->node;
 	extent_buffer_get(root->node);
+	INIT_LIST_HEAD(&h->dirty_bgs);
 
 	return h;
 }
diff --git a/transaction.h b/transaction.h
index 750f456b3cc0..8fa65508fa8d 100644
--- a/transaction.h
+++ b/transaction.h
@@ -22,6 +22,7 @@
 #include "kerncompat.h"
 #include "ctree.h"
 #include "delayed-ref.h"
+#include "kernel-lib/list.h"
 
 struct btrfs_trans_handle {
 	struct btrfs_fs_info *fs_info;
@@ -35,7 +36,7 @@ struct btrfs_trans_handle {
 	unsigned long blocks_used;
 	struct btrfs_block_group_cache *block_group;
 	struct btrfs_delayed_ref_root delayed_refs;
-
+	struct list_head dirty_bgs;
 };
 
 struct btrfs_trans_handle* btrfs_start_transaction(struct btrfs_root *root,
-- 
2.21.0 (Apple Git-122.2)