We've forgotten to update root's last_snapshot gen to the latest sub transid,
so that we will free some extent buffers unexpectedly. And this will cause
a inconsistent tree crash.
Signed-off-by: Liu Bo <liubo2...@cn.fujitsu.com>
---
fs/btrfs/transaction.c | 3 ++-
1 files changed, 2 insertions(+), 1 deletions(-)
diff --git a/fs/btrfs/transaction.c b/fs/btrfs/transaction.c
index e3d2970..e31cdef 100644
--- a/fs/btrfs/transaction.c
+++ b/fs/btrfs/transaction.c
@@ -927,7 +927,8 @@ static noinline int create_pending_snapshot(struct
btrfs_trans_handle *trans,
BUG_ON(ret);
record_root_in_trans(trans, root);
- btrfs_set_root_last_snapshot(&root->root_item, trans->transid);
+ btrfs_set_root_last_snapshot(&root->root_item,
+ trans->transaction->sub_transid);
memcpy(new_root_item, &root->root_item, sizeof(*new_root_item));
btrfs_check_and_init_root_item(new_root_item);
--
1.6.5.2
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