[v5,4/9] btrfs: Use btrfs_test_trans_opt() to handle SPACE_CACHE if it's under transaction protect.

Commit Message

Qu Wenruo Jan. 30, 2015, 9:20 a.m. UTC

Convert btrfs_test_opt() to btrfs_test_trans_opt() if it's called under
transaction protection.
This will ensure SPACE_CACHE bit is consistent during transaction.

Signed-off-by: Qu Wenruo <[e-mail]>
---
changelog:
v3:
  Newly introduced.
v4~v5:
  None
---
 fs/btrfs/extent-tree.c | 2 +-
 fs/btrfs/transaction.c | 7 ++++---
 2 files changed, 5 insertions(+), 4 deletions(-)

Comments

David Sterba Jan. 30, 2015, 7:12 p.m. UTC | #1

On Fri, Jan 30, 2015 at 05:20:49PM +0800, Qu Wenruo wrote:
> Convert btrfs_test_opt() to btrfs_test_trans_opt() if it's called under
> transaction protection.
> This will ensure SPACE_CACHE bit is consistent during transaction.
> 
> Signed-off-by: Qu Wenruo <[e-mail]>

Reviewed-by: David Sterba <[e-mail]>
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Patch

diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c
index a684086..fde502c 100644
--- a/fs/btrfs/extent-tree.c
+++ b/fs/btrfs/extent-tree.c
@@ -3260,7 +3260,7 @@  again:
 
 	spin_lock(&block_group->lock);
 	if (block_group->cached != BTRFS_CACHE_FINISHED ||
-	    !btrfs_test_opt(root, SPACE_CACHE) ||
+	    !btrfs_test_trans_opt(trans, SPACE_CACHE) ||
 	    block_group->delalloc_bytes) {
 		/*
 		 * don't bother trying to write stuff out _if_
diff --git a/fs/btrfs/transaction.c b/fs/btrfs/transaction.c
index 846e1b8..aec5a5a 100644
--- a/fs/btrfs/transaction.c
+++ b/fs/btrfs/transaction.c
@@ -1507,7 +1507,8 @@  static noinline int create_pending_snapshots(struct btrfs_trans_handle *trans,
 	return ret;
 }
 
-static void update_super_roots(struct btrfs_root *root)
+static void update_super_roots(struct btrfs_trans_handle *trans,
+			       struct btrfs_root *root)
 {
 	struct btrfs_root_item *root_item;
 	struct btrfs_super_block *super;
@@ -1523,7 +1524,7 @@  static void update_super_roots(struct btrfs_root *root)
 	super->root = root_item->bytenr;
 	super->generation = root_item->generation;
 	super->root_level = root_item->level;
-	if (btrfs_test_opt(root, SPACE_CACHE))
+	if (btrfs_test_trans_opt(trans, SPACE_CACHE))
 		super->cache_generation = root_item->generation;
 	if (root->fs_info->update_uuid_tree_gen)
 		super->uuid_tree_generation = root_item->generation;
@@ -1987,7 +1988,7 @@  int btrfs_commit_transaction(struct btrfs_trans_handle *trans,
 	switch_commit_roots(cur_trans, root->fs_info);
 
 	assert_qgroups_uptodate(trans);
-	update_super_roots(root);
+	update_super_roots(trans, root);
 
 	btrfs_set_super_log_root(root->fs_info->super_copy, 0);
 	btrfs_set_super_log_root_level(root->fs_info->super_copy, 0);