From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mx0b-00082601.pphosted.com ([67.231.153.30]:11907 "EHLO mx0b-00082601.pphosted.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S933069AbbESOVI (ORCPT ); Tue, 19 May 2015 10:21:08 -0400 Received: from pps.filterd (m0004060 [127.0.0.1]) by mx0b-00082601.pphosted.com (8.14.5/8.14.5) with SMTP id t4JEGVo3018937 for ; Tue, 19 May 2015 07:21:07 -0700 Received: from mail.thefacebook.com ([199.201.64.23]) by mx0b-00082601.pphosted.com with ESMTP id 1ug43urpxa-1 (version=TLSv1/SSLv3 cipher=AES128-SHA bits=128 verify=NOT) for ; Tue, 19 May 2015 07:21:07 -0700 From: Josef Bacik To: Subject: [PATCH] Btrfs-progs: add the ability to remove csums Date: Tue, 19 May 2015 10:21:04 -0400 Message-ID: <1432045264-5285-1-git-send-email-jbacik@fb.com> MIME-Version: 1.0 Content-Type: text/plain Sender: linux-btrfs-owner@vger.kernel.org List-ID: Sometimes we need to test what happens when we're missing a csum for a range, so add an option to btrfs-corrupt-block to be able to remove a csum range. Thanks, Signed-off-by: Josef Bacik --- btrfs-corrupt-block.c | 34 +++++++++++++++++++++++++++++++++- 1 file changed, 33 insertions(+), 1 deletion(-) diff --git a/btrfs-corrupt-block.c b/btrfs-corrupt-block.c index f332bdf..7fa92ab 100644 --- a/btrfs-corrupt-block.c +++ b/btrfs-corrupt-block.c @@ -110,6 +110,9 @@ static void print_usage(void) fprintf(stderr, "\t-D Corrupt a dir item, must specify key and field\n"); fprintf(stderr, "\t-d Delete this item (must specify -K)\n"); fprintf(stderr, "\t-r Operate on this root (only works with -d)\n"); + fprintf(stderr, "\t-C Delete a csum for the specified bytenr. When " + "used with -b it'll delete that many bytes, otherwise it's " + "just sectorsize\n"); exit(1); } @@ -843,6 +846,26 @@ out: return ret; } +static int delete_csum(struct btrfs_root *root, u64 bytenr, u64 bytes) +{ + struct btrfs_trans_handle *trans; + int ret; + + root = root->fs_info->csum_root; + trans = btrfs_start_transaction(root, 1); + if (IS_ERR(trans)) { + fprintf(stderr, "Couldn't start transaction %ld\n", + PTR_ERR(trans)); + return PTR_ERR(trans); + } + + ret = btrfs_del_csums(trans, root, bytenr, bytes); + if (ret) + fprintf(stderr, "Error deleting csums %d\n", ret); + btrfs_commit_transaction(trans, root); + return ret; +} + /* corrupt item using NO cow. * Because chunk recover will recover based on whole partition scaning, * If using COW, chunk recover will use the old item to recover, @@ -1009,6 +1032,7 @@ int main(int ac, char **av) u64 inode = 0; u64 file_extent = (u64)-1; u64 root_objectid = 0; + u64 csum_bytenr = 0; char field[FIELD_BUF_LEN]; field[0] = '\0'; @@ -1037,10 +1061,11 @@ int main(int ac, char **av) { "dir-item", 0, NULL, 'D'}, { "delete", 0, NULL, 'd'}, { "root", 0, NULL, 'r'}, + { "csum", 1, NULL, 'C'}, { NULL, 0, NULL, 0 } }; - c = getopt_long(ac, av, "l:c:b:eEkuUi:f:x:m:K:IDdr:", + c = getopt_long(ac, av, "l:c:b:eEkuUi:f:x:m:K:IDdr:C:", long_options, &option_index); if (c < 0) break; @@ -1104,6 +1129,9 @@ int main(int ac, char **av) case 'r': root_objectid = arg_strtou64(optarg); break; + case 'C': + csum_bytenr = arg_strtou64(optarg); + break; default: print_usage(); } @@ -1206,6 +1234,10 @@ int main(int ac, char **av) ret = corrupt_dir_item(root, &key, field); goto out_close; } + if (csum_bytenr) { + ret = delete_csum(root, csum_bytenr, bytes); + goto out_close; + } if (corrupt_item) { if (!key.objectid) print_usage(); -- 1.8.3.1