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https://github.com/kdave/btrfs-progs
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Btrfs-progs: add the ability to delete items
Somtetimes you just need to delete an item, add that functionality to btrfs-corrupt-block. Thanks, Signed-off-by: Josef Bacik <jbacik@fb.com> Signed-off-by: David Sterba <dsterba@suse.cz>
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5676e94ad8
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@ -111,6 +111,7 @@ static void print_usage(void)
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fprintf(stderr, "\t-I An item to corrupt (must also specify the field "
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"to corrupt and a root+key for the item)\n");
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fprintf(stderr, "\t-D Corrupt a dir item, must specify key and field\n");
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fprintf(stderr, "\t-d Delete this item (must specify -K)\n");
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exit(1);
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}
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@ -811,6 +812,39 @@ out:
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return ret;
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}
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static int delete_item(struct btrfs_root *root, struct btrfs_key *key)
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{
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struct btrfs_trans_handle *trans;
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struct btrfs_path *path;
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int ret;
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path = btrfs_alloc_path();
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if (!path)
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return -ENOMEM;
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trans = btrfs_start_transaction(root, 1);
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if (IS_ERR(trans)) {
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btrfs_free_path(path);
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fprintf(stderr, "Couldn't start transaction %ld\n",
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PTR_ERR(trans));
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return PTR_ERR(trans);
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}
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ret = btrfs_search_slot(trans, root, key, path, -1, 1);
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if (ret) {
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if (ret > 0)
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ret = -ENOENT;
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fprintf(stderr, "Error searching to node %d\n", ret);
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goto out;
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}
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ret = btrfs_del_item(trans, root, path);
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btrfs_mark_buffer_dirty(path->nodes[0]);
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out:
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btrfs_commit_transaction(trans, root);
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btrfs_free_path(path);
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return ret;
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}
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static struct option long_options[] = {
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/* { "byte-count", 1, NULL, 'b' }, */
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{ "logical", 1, NULL, 'l' },
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@ -828,6 +862,7 @@ static struct option long_options[] = {
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{ "key", 1, NULL, 'K'},
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{ "item", 0, NULL, 'I'},
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{ "dir-item", 0, NULL, 'D'},
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{ "delete", 0, NULL, 'd'},
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{ 0, 0, 0, 0}
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};
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@ -993,6 +1028,7 @@ int main(int ac, char **av)
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int chunk_tree = 0;
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int corrupt_item = 0;
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int corrupt_di = 0;
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int delete = 0;
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u64 metadata_block = 0;
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u64 inode = 0;
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u64 file_extent = (u64)-1;
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@ -1004,7 +1040,7 @@ int main(int ac, char **av)
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while(1) {
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int c;
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c = getopt_long(ac, av, "l:c:b:eEkuUi:f:x:m:K:ID", long_options,
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c = getopt_long(ac, av, "l:c:b:eEkuUi:f:x:m:K:IDd", long_options,
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&option_index);
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if (c < 0)
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break;
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@ -1060,6 +1096,8 @@ int main(int ac, char **av)
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break;
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case 'I':
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corrupt_item = 1;
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case 'd':
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delete = 1;
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break;
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default:
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print_usage();
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@ -1167,6 +1205,11 @@ int main(int ac, char **av)
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if (!key.objectid)
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print_usage();
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ret = corrupt_btrfs_item(root, &key, field);
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}
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if (delete) {
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if (!key.objectid)
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print_usage();
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ret = delete_item(root, &key);
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goto out_close;
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}
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if (key.objectid || key.offset || key.type) {
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