Somtetimes you just need to delete an item, add that functionality to
btrfs-corrupt-block. Thanks,
Signed-off-by: Josef Bacik <jbacik@fb.com>
---
btrfs-corrupt-block.c | 47 ++++++++++++++++++++++++++++++++++++++++++++++-
1 file changed, 46 insertions(+), 1 deletion(-)
diff --git a/btrfs-corrupt-block.c b/btrfs-corrupt-block.c
index 22390b5..278a56f 100644
--- a/btrfs-corrupt-block.c
+++ b/btrfs-corrupt-block.c
@@ -108,6 +108,7 @@ static void print_usage(void)
fprintf(stderr, "\t-K The key to corrupt in the format "
"<num>,<num>,<num> (must also specify -f for the
field)\n");
fprintf(stderr, "\t-f The field in the item to corrupt\n");
+ fprintf(stderr, "\t-d Delete this item (must specify -K)\n");
exit(1);
}
@@ -645,6 +646,39 @@ out:
return ret;
}
+static int delete_item(struct btrfs_root *root, struct btrfs_key *key)
+{
+ struct btrfs_trans_handle *trans;
+ struct btrfs_path *path;
+ int ret;
+
+ path = btrfs_alloc_path();
+ if (!path)
+ return -ENOMEM;
+
+ trans = btrfs_start_transaction(root, 1);
+ if (IS_ERR(trans)) {
+ btrfs_free_path(path);
+ fprintf(stderr, "Couldn't start transaction %ld\n",
+ PTR_ERR(trans));
+ return PTR_ERR(trans);
+ }
+
+ ret = btrfs_search_slot(trans, root, key, path, -1, 1);
+ if (ret) {
+ if (ret > 0)
+ ret = -ENOENT;
+ fprintf(stderr, "Error searching to node %d\n", ret);
+ goto out;
+ }
+ ret = btrfs_del_item(trans, root, path);
+ btrfs_mark_buffer_dirty(path->nodes[0]);
+out:
+ btrfs_commit_transaction(trans, root);
+ btrfs_free_path(path);
+ return ret;
+}
+
static struct option long_options[] = {
/* { "byte-count", 1, NULL, 'b' }, */
{ "logical", 1, NULL, 'l' },
@@ -660,6 +694,7 @@ static struct option long_options[] = {
{ "metadata-block", 1, NULL, 'm'},
{ "field", 1, NULL, 'f'},
{ "key", 1, NULL, 'K'},
+ { "delete", 0, NULL, 'd'},
{ 0, 0, 0, 0}
};
@@ -823,6 +858,7 @@ int main(int ac, char **av)
int corrupt_block_keys = 0;
int chunk_rec = 0;
int chunk_tree = 0;
+ int delete = 0;
u64 metadata_block = 0;
u64 inode = 0;
u64 file_extent = (u64)-1;
@@ -834,7 +870,7 @@ int main(int ac, char **av)
while(1) {
int c;
- c = getopt_long(ac, av, "l:c:b:eEkuUi:f:x:m:K:", long_options,
+ c = getopt_long(ac, av, "l:c:b:eEkuUi:f:x:m:K:d", long_options,
&option_index);
if (c < 0)
break;
@@ -885,6 +921,9 @@ int main(int ac, char **av)
print_usage();
}
break;
+ case 'd':
+ delete = 1;
+ break;
default:
print_usage();
}
@@ -981,6 +1020,12 @@ int main(int ac, char **av)
ret = corrupt_metadata_block(root, metadata_block, field);
goto out_close;
}
+ if (delete) {
+ if (!key.objectid)
+ print_usage();
+ ret = delete_item(root, &key);
+ goto out_close;
+ }
if (key.objectid || key.offset || key.type) {
if (!strlen(field))
print_usage();
--
1.8.3.1
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