Quite a lot of qgroup corruption happens due to wrong timing of calling
btrfs_qgroup_prepare_account_extents().
Since the safest timing is calling it just before
btrfs_qgroup_account_extents(), there is no need to separate these 2
function.
Merging them will make code cleaner and less bug prone.
Signed-off-by: Qu Wenruo <quwen...@cn.fujitsu.com>
---
fs/btrfs/qgroup.c | 50 +++++++++++++++++---------------------------------
fs/btrfs/qgroup.h | 2 --
fs/btrfs/transaction.c | 10 ----------
3 files changed, 17 insertions(+), 45 deletions(-)
diff --git a/fs/btrfs/qgroup.c b/fs/btrfs/qgroup.c
index 905fed1ee0dd..9f01c25469f7 100644
--- a/fs/btrfs/qgroup.c
+++ b/fs/btrfs/qgroup.c
@@ -1403,38 +1403,6 @@ int btrfs_limit_qgroup(struct btrfs_trans_handle *trans,
return ret;
}
-int btrfs_qgroup_prepare_account_extents(struct btrfs_trans_handle *trans,
- struct btrfs_fs_info *fs_info)
-{
- struct btrfs_qgroup_extent_record *record;
- struct btrfs_delayed_ref_root *delayed_refs;
- struct rb_node *node;
- u64 qgroup_to_skip;
- int ret = 0;
-
- delayed_refs = &trans->transaction->delayed_refs;
- qgroup_to_skip = delayed_refs->qgroup_to_skip;
-
- /*
- * No need to do lock, since this function will only be called in
- * btrfs_commit_transaction().
- */
- node = rb_first(&delayed_refs->dirty_extent_root);
- while (node) {
- record = rb_entry(node, struct btrfs_qgroup_extent_record,
- node);
- if (WARN_ON(!record->old_roots))
- ret = btrfs_find_all_roots(NULL, fs_info,
- record->bytenr, 0, &record->old_roots);
- if (ret < 0)
- break;
- if (qgroup_to_skip)
- ulist_del(record->old_roots, qgroup_to_skip, 0);
- node = rb_next(node);
- }
- return ret;
-}
-
int btrfs_qgroup_trace_extent_nolock(struct btrfs_fs_info *fs_info,
struct btrfs_delayed_ref_root *delayed_refs,
struct btrfs_qgroup_extent_record *record)
@@ -2051,6 +2019,19 @@ int btrfs_qgroup_account_extents(struct
btrfs_trans_handle *trans,
if (!ret) {
/*
+ * old roots should be searched when inserting qgroup
+ * extent record
+ */
+ if (WARN_ON(!record->old_roots)) {
+ /* Search commit root to find old_roots */
+ ret = btrfs_find_all_roots(NULL, fs_info,
+ record->bytenr, 0,
+ &record->old_roots);
+ if (ret < 0)
+ goto cleanup;
+ }
+
+ /*
* Use SEQ_LAST as time_seq to do special search, which
* doesn't lock tree or delayed_refs and search current
* root. It's safe inside commit_transaction().
@@ -2059,8 +2040,11 @@ int btrfs_qgroup_account_extents(struct
btrfs_trans_handle *trans,
record->bytenr, SEQ_LAST, &new_roots);
if (ret < 0)
goto cleanup;
- if (qgroup_to_skip)
+ if (qgroup_to_skip) {
ulist_del(new_roots, qgroup_to_skip, 0);
+ ulist_del(record->old_roots, qgroup_to_skip,
+ 0);
+ }
ret = btrfs_qgroup_account_extent(trans, fs_info,
record->bytenr, record->num_bytes,
record->old_roots, new_roots);
diff --git a/fs/btrfs/qgroup.h b/fs/btrfs/qgroup.h
index fe04d3f295c6..38d14d4575c0 100644
--- a/fs/btrfs/qgroup.h
+++ b/fs/btrfs/qgroup.h
@@ -134,8 +134,6 @@ int btrfs_limit_qgroup(struct btrfs_trans_handle *trans,
int btrfs_read_qgroup_config(struct btrfs_fs_info *fs_info);
void btrfs_free_qgroup_config(struct btrfs_fs_info *fs_info);
struct btrfs_delayed_extent_op;
-int btrfs_qgroup_prepare_account_extents(struct btrfs_trans_handle *trans,
- struct btrfs_fs_info *fs_info);
/*
* Inform qgroup to trace one dirty extent, its info is recorded in @record.
* So qgroup can account it at transaction committing time.
diff --git a/fs/btrfs/transaction.c b/fs/btrfs/transaction.c
index 2168654c90a1..ee5b41d297d1 100644
--- a/fs/btrfs/transaction.c
+++ b/fs/btrfs/transaction.c
@@ -1374,9 +1374,6 @@ static int qgroup_account_snapshot(struct
btrfs_trans_handle *trans,
ret = commit_fs_roots(trans, fs_info);
if (ret)
goto out;
- ret = btrfs_qgroup_prepare_account_extents(trans, fs_info);
- if (ret < 0)
- goto out;
ret = btrfs_qgroup_account_extents(trans, fs_info);
if (ret < 0)
goto out;
@@ -2180,13 +2177,6 @@ int btrfs_commit_transaction(struct btrfs_trans_handle
*trans)
goto scrub_continue;
}
- ret = btrfs_qgroup_prepare_account_extents(trans, fs_info);
- if (ret) {
- mutex_unlock(&fs_info->tree_log_mutex);
- mutex_unlock(&fs_info->reloc_mutex);
- goto scrub_continue;
- }
-
/*
* Since fs roots are all committed, we can get a quite accurate
* new_roots. So let's do quota accounting.
--
2.12.2
--
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