packaging: Apply ASLR feature

[platform/upstream/btrfs-progs.git] / transaction.c

diff --git a/transaction.c b/transaction.c
index 6677a22..ad70572 100644 (file)
--- a/transaction.c
+++ b/transaction.c
@@ -26,6 +26,9 @@ struct btrfs_trans_handle* btrfs_start_transaction(struct btrfs_root *root,
        struct btrfs_fs_info *fs_info = root->fs_info;
        struct btrfs_trans_handle *h = kzalloc(sizeof(*h), GFP_NOFS);
 
+       if (fs_info->transaction_aborted)
+               return ERR_PTR(-EROFS);
+
        if (!h)
                return ERR_PTR(-ENOMEM);
        if (root->commit_root) {
@@ -141,6 +144,9 @@ int btrfs_commit_transaction(struct btrfs_trans_handle *trans,
        int ret = 0;
        struct btrfs_fs_info *fs_info = root->fs_info;
 
+       if (trans->fs_info->transaction_aborted)
+               return -EROFS;
+
        if (root->commit_root == root->node)
                goto commit_tree;
        if (root == root->fs_info->tree_root)
@@ -173,3 +179,7 @@ commit_tree:
        return 0;
 }
 
+void btrfs_abort_transaction(struct btrfs_trans_handle *trans, int error)
+{
+       trans->fs_info->transaction_aborted = error;
+}