btrfs: move btrfs_abort_transaction to transaction.c

While trying to sync messages.[ch] I ended up with this dependency on
messages.h in the rest of btrfs-progs code base because it's where
btrfs_abort_transaction() was now held.  We want to keep messages.[ch]
limited to the kernel code, and the btrfs_abort_transaction() code
better fits in the transaction code and not in messages.

Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Signed-off-by: Josef Bacik <josef@toxicpanda.com>
Reviewed-by: David Sterba <dsterba@suse.com>
[ move the __cold attributes ]
Signed-off-by: David Sterba <dsterba@suse.com>

1 files changed, 29 insertions, 0 deletions

diff --git a/fs/btrfs/transaction.c b/fs/btrfs/transaction.c
index b8c52e89688c..528efe559866 100644
--- a/fs/btrfs/transaction.c
+++ b/fs/btrfs/transaction.c
@@ -2604,6 +2604,35 @@ int btrfs_clean_one_deleted_snapshot(struct btrfs_fs_info *fs_info)
 	return (ret < 0) ? 0 : 1;
 }
 
+/*
+ * We only mark the transaction aborted and then set the file system read-only.
+ * This will prevent new transactions from starting or trying to join this
+ * one.
+ *
+ * This means that error recovery at the call site is limited to freeing
+ * any local memory allocations and passing the error code up without
+ * further cleanup. The transaction should complete as it normally would
+ * in the call path but will return -EIO.
+ *
+ * We'll complete the cleanup in btrfs_end_transaction and
+ * btrfs_commit_transaction.
+ */
+void __cold __btrfs_abort_transaction(struct btrfs_trans_handle *trans,
+				      const char *function,
+				      unsigned int line, int errno, bool first_hit)
+{
+	struct btrfs_fs_info *fs_info = trans->fs_info;
+
+	WRITE_ONCE(trans->aborted, errno);
+	WRITE_ONCE(trans->transaction->aborted, errno);
+	if (first_hit && errno == -ENOSPC)
+		btrfs_dump_space_info_for_trans_abort(fs_info);
+	/* Wake up anybody who may be waiting on this transaction */
+	wake_up(&fs_info->transaction_wait);
+	wake_up(&fs_info->transaction_blocked_wait);
+	__btrfs_handle_fs_error(fs_info, function, line, errno, NULL);
+}
+
 int __init btrfs_transaction_init(void)
 {
 	btrfs_trans_handle_cachep = kmem_cache_create("btrfs_trans_handle",