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authorFilipe Manana <fdmanana@gmail.com>2014-06-24 17:48:28 +0100
committerChris Mason <clm@fb.com>2014-06-28 13:48:46 -0700
commit46c4e71e9b02a649c722f06569f5b6575da02dba (patch)
tree9e4d947c41be9ed97076a630bd80a6e7dcfba2b8 /fs/btrfs
parentc39aa7056f50fa7b49265ea35c0f3eddb7c7be68 (diff)
Btrfs: assert send doesn't attempt to start transactions
When starting a transaction just assert that current->journal_info doesn't contain a send transaction stub, since send isn't supposed to start transactions and when it finishes (either successfully or not) it's supposed to set current->journal_info to NULL. This is motivated by the change titled: Btrfs: fix crash when starting transaction Signed-off-by: Filipe David Borba Manana <fdmanana@gmail.com> Signed-off-by: Chris Mason <clm@fb.com>
Diffstat (limited to 'fs/btrfs')
-rw-r--r--fs/btrfs/transaction.c6
1 files changed, 4 insertions, 2 deletions
diff --git a/fs/btrfs/transaction.c b/fs/btrfs/transaction.c
index 511839c04f11..a32ad65b6cdc 100644
--- a/fs/btrfs/transaction.c
+++ b/fs/btrfs/transaction.c
@@ -386,11 +386,13 @@ start_transaction(struct btrfs_root *root, u64 num_items, unsigned int type,
bool reloc_reserved = false;
int ret;
+ /* Send isn't supposed to start transactions. */
+ ASSERT(current->journal_info != (void *)BTRFS_SEND_TRANS_STUB);
+
if (test_bit(BTRFS_FS_STATE_ERROR, &root->fs_info->fs_state))
return ERR_PTR(-EROFS);
- if (current->journal_info &&
- current->journal_info != (void *)BTRFS_SEND_TRANS_STUB) {
+ if (current->journal_info) {
WARN_ON(type & TRANS_EXTWRITERS);
h = current->journal_info;
h->use_count++;