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-rw-r--r--fs/btrfs/disk-io.c111
-rw-r--r--fs/btrfs/transaction.c22
-rw-r--r--fs/btrfs/transaction.h1
3 files changed, 52 insertions, 82 deletions
diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c
index 01a26e2eb310..b131d716d5a5 100644
--- a/fs/btrfs/disk-io.c
+++ b/fs/btrfs/disk-io.c
@@ -64,7 +64,6 @@ static void btrfs_destroy_ordered_operations(struct btrfs_transaction *t,
static void btrfs_destroy_ordered_extents(struct btrfs_root *root);
static int btrfs_destroy_delayed_refs(struct btrfs_transaction *trans,
struct btrfs_root *root);
-static void btrfs_evict_pending_snapshots(struct btrfs_transaction *t);
static void btrfs_destroy_delalloc_inodes(struct btrfs_root *root);
static int btrfs_destroy_marked_extents(struct btrfs_root *root,
struct extent_io_tree *dirty_pages,
@@ -3915,24 +3914,6 @@ static int btrfs_destroy_delayed_refs(struct btrfs_transaction *trans,
return ret;
}
-static void btrfs_evict_pending_snapshots(struct btrfs_transaction *t)
-{
- struct btrfs_pending_snapshot *snapshot;
- struct list_head splice;
-
- INIT_LIST_HEAD(&splice);
-
- list_splice_init(&t->pending_snapshots, &splice);
-
- while (!list_empty(&splice)) {
- snapshot = list_entry(splice.next,
- struct btrfs_pending_snapshot,
- list);
- snapshot->error = -ECANCELED;
- list_del_init(&snapshot->list);
- }
-}
-
static void btrfs_destroy_delalloc_inodes(struct btrfs_root *root)
{
struct btrfs_inode *btrfs_inode;
@@ -4062,6 +4043,8 @@ again:
void btrfs_cleanup_one_transaction(struct btrfs_transaction *cur_trans,
struct btrfs_root *root)
{
+ btrfs_destroy_ordered_operations(cur_trans, root);
+
btrfs_destroy_delayed_refs(cur_trans, root);
btrfs_block_rsv_release(root, &root->fs_info->trans_block_rsv,
cur_trans->dirty_pages.dirty_bytes);
@@ -4069,8 +4052,6 @@ void btrfs_cleanup_one_transaction(struct btrfs_transaction *cur_trans,
cur_trans->state = TRANS_STATE_COMMIT_START;
wake_up(&root->fs_info->transaction_blocked_wait);
- btrfs_evict_pending_snapshots(cur_trans);
-
cur_trans->state = TRANS_STATE_UNBLOCKED;
wake_up(&root->fs_info->transaction_wait);
@@ -4094,63 +4075,51 @@ void btrfs_cleanup_one_transaction(struct btrfs_transaction *cur_trans,
static int btrfs_cleanup_transaction(struct btrfs_root *root)
{
struct btrfs_transaction *t;
- LIST_HEAD(list);
mutex_lock(&root->fs_info->transaction_kthread_mutex);
spin_lock(&root->fs_info->trans_lock);
- list_splice_init(&root->fs_info->trans_list, &list);
- root->fs_info->running_transaction = NULL;
- spin_unlock(&root->fs_info->trans_lock);
-
- while (!list_empty(&list)) {
- t = list_entry(list.next, struct btrfs_transaction, list);
-
- btrfs_destroy_ordered_operations(t, root);
-
- btrfs_destroy_all_ordered_extents(root->fs_info);
-
- btrfs_destroy_delayed_refs(t, root);
-
- /*
- * FIXME: cleanup wait for commit
- * We needn't acquire the lock here, because we are during
- * the umount, there is no other task which will change it.
- */
- t->state = TRANS_STATE_COMMIT_START;
- smp_mb();
- if (waitqueue_active(&root->fs_info->transaction_blocked_wait))
- wake_up(&root->fs_info->transaction_blocked_wait);
-
- btrfs_evict_pending_snapshots(t);
-
- t->state = TRANS_STATE_UNBLOCKED;
- smp_mb();
- if (waitqueue_active(&root->fs_info->transaction_wait))
- wake_up(&root->fs_info->transaction_wait);
-
- btrfs_destroy_delayed_inodes(root);
- btrfs_assert_delayed_root_empty(root);
-
- btrfs_destroy_all_delalloc_inodes(root->fs_info);
-
- btrfs_destroy_marked_extents(root, &t->dirty_pages,
- EXTENT_DIRTY);
-
- btrfs_destroy_pinned_extent(root,
- root->fs_info->pinned_extents);
-
- t->state = TRANS_STATE_COMPLETED;
- smp_mb();
- if (waitqueue_active(&t->commit_wait))
- wake_up(&t->commit_wait);
+ while (!list_empty(&root->fs_info->trans_list)) {
+ t = list_first_entry(&root->fs_info->trans_list,
+ struct btrfs_transaction, list);
+ if (t->state >= TRANS_STATE_COMMIT_START) {
+ atomic_inc(&t->use_count);
+ spin_unlock(&root->fs_info->trans_lock);
+ btrfs_wait_for_commit(root, t->transid);
+ btrfs_put_transaction(t);
+ spin_lock(&root->fs_info->trans_lock);
+ continue;
+ }
+ if (t == root->fs_info->running_transaction) {
+ t->state = TRANS_STATE_COMMIT_DOING;
+ spin_unlock(&root->fs_info->trans_lock);
+ /*
+ * We wait for 0 num_writers since we don't hold a trans
+ * handle open currently for this transaction.
+ */
+ wait_event(t->writer_wait,
+ atomic_read(&t->num_writers) == 0);
+ } else {
+ spin_unlock(&root->fs_info->trans_lock);
+ }
+ btrfs_cleanup_one_transaction(t, root);
- atomic_set(&t->use_count, 0);
+ spin_lock(&root->fs_info->trans_lock);
+ if (t == root->fs_info->running_transaction)
+ root->fs_info->running_transaction = NULL;
list_del_init(&t->list);
- memset(t, 0, sizeof(*t));
- kmem_cache_free(btrfs_transaction_cachep, t);
- }
+ spin_unlock(&root->fs_info->trans_lock);
+ btrfs_put_transaction(t);
+ trace_btrfs_transaction_commit(root);
+ spin_lock(&root->fs_info->trans_lock);
+ }
+ spin_unlock(&root->fs_info->trans_lock);
+ btrfs_destroy_all_ordered_extents(root->fs_info);
+ btrfs_destroy_delayed_inodes(root);
+ btrfs_assert_delayed_root_empty(root);
+ btrfs_destroy_pinned_extent(root, root->fs_info->pinned_extents);
+ btrfs_destroy_all_delalloc_inodes(root->fs_info);
mutex_unlock(&root->fs_info->transaction_kthread_mutex);
return 0;
diff --git a/fs/btrfs/transaction.c b/fs/btrfs/transaction.c
index f08e22885c21..134039fd59bb 100644
--- a/fs/btrfs/transaction.c
+++ b/fs/btrfs/transaction.c
@@ -57,7 +57,7 @@ static unsigned int btrfs_blocked_trans_types[TRANS_STATE_MAX] = {
__TRANS_JOIN_NOLOCK),
};
-static void put_transaction(struct btrfs_transaction *transaction)
+void btrfs_put_transaction(struct btrfs_transaction *transaction)
{
WARN_ON(atomic_read(&transaction->use_count) == 0);
if (atomic_dec_and_test(&transaction->use_count)) {
@@ -332,7 +332,7 @@ static void wait_current_trans(struct btrfs_root *root)
wait_event(root->fs_info->transaction_wait,
cur_trans->state >= TRANS_STATE_UNBLOCKED ||
cur_trans->aborted);
- put_transaction(cur_trans);
+ btrfs_put_transaction(cur_trans);
} else {
spin_unlock(&root->fs_info->trans_lock);
}
@@ -610,7 +610,7 @@ int btrfs_wait_for_commit(struct btrfs_root *root, u64 transid)
}
wait_for_commit(root, cur_trans);
- put_transaction(cur_trans);
+ btrfs_put_transaction(cur_trans);
out:
return ret;
}
@@ -735,7 +735,7 @@ static int __btrfs_end_transaction(struct btrfs_trans_handle *trans,
smp_mb();
if (waitqueue_active(&cur_trans->writer_wait))
wake_up(&cur_trans->writer_wait);
- put_transaction(cur_trans);
+ btrfs_put_transaction(cur_trans);
if (current->journal_info == trans)
current->journal_info = NULL;
@@ -1515,7 +1515,7 @@ int btrfs_commit_transaction_async(struct btrfs_trans_handle *trans,
if (current->journal_info == trans)
current->journal_info = NULL;
- put_transaction(cur_trans);
+ btrfs_put_transaction(cur_trans);
return 0;
}
@@ -1559,8 +1559,8 @@ static void cleanup_transaction(struct btrfs_trans_handle *trans,
if (trans->type & __TRANS_FREEZABLE)
sb_end_intwrite(root->fs_info->sb);
- put_transaction(cur_trans);
- put_transaction(cur_trans);
+ btrfs_put_transaction(cur_trans);
+ btrfs_put_transaction(cur_trans);
trace_btrfs_transaction_commit(root);
@@ -1676,7 +1676,7 @@ int btrfs_commit_transaction(struct btrfs_trans_handle *trans,
wait_for_commit(root, cur_trans);
- put_transaction(cur_trans);
+ btrfs_put_transaction(cur_trans);
return ret;
}
@@ -1693,7 +1693,7 @@ int btrfs_commit_transaction(struct btrfs_trans_handle *trans,
wait_for_commit(root, prev_trans);
- put_transaction(prev_trans);
+ btrfs_put_transaction(prev_trans);
} else {
spin_unlock(&root->fs_info->trans_lock);
}
@@ -1892,8 +1892,8 @@ int btrfs_commit_transaction(struct btrfs_trans_handle *trans,
list_del_init(&cur_trans->list);
spin_unlock(&root->fs_info->trans_lock);
- put_transaction(cur_trans);
- put_transaction(cur_trans);
+ btrfs_put_transaction(cur_trans);
+ btrfs_put_transaction(cur_trans);
if (trans->type & __TRANS_FREEZABLE)
sb_end_intwrite(root->fs_info->sb);
diff --git a/fs/btrfs/transaction.h b/fs/btrfs/transaction.h
index 5c2af8491621..306f88ae1de3 100644
--- a/fs/btrfs/transaction.h
+++ b/fs/btrfs/transaction.h
@@ -166,4 +166,5 @@ int btrfs_wait_marked_extents(struct btrfs_root *root,
struct extent_io_tree *dirty_pages, int mark);
int btrfs_transaction_blocked(struct btrfs_fs_info *info);
int btrfs_transaction_in_commit(struct btrfs_fs_info *info);
+void btrfs_put_transaction(struct btrfs_transaction *transaction);
#endif
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