From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from aserp1040.oracle.com ([141.146.126.69]:20722 "EHLO aserp1040.oracle.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753568AbbKYMI6 (ORCPT ); Wed, 25 Nov 2015 07:08:58 -0500 From: Anand Jain To: linux-btrfs@vger.kernel.org Cc: dsterba@suse.cz, calestyo@scientia.net, ahferroin7@gmail.com, 1i5t5.duncan@cox.net Subject: [PATCH 7/7] btrfs-progs: add -O comp= option for btrfs-convert Date: Wed, 25 Nov 2015 20:08:20 +0800 Message-Id: <1448453300-8449-8-git-send-email-anand.jain@oracle.com> In-Reply-To: <1448453300-8449-1-git-send-email-anand.jain@oracle.com> References: <1448453300-8449-1-git-send-email-anand.jain@oracle.com> Sender: linux-btrfs-owner@vger.kernel.org List-ID: User may want to convert the FS to a minimum kernel version. As they may need to use btrfs on a set of known kernel versions. And have the disk layout compatible. Signed-off-by: Anand Jain --- btrfs-convert.c | 21 +++++++++++++++++++++ 1 file changed, 21 insertions(+) diff --git a/btrfs-convert.c b/btrfs-convert.c index b0a998b..01b8940 100644 --- a/btrfs-convert.c +++ b/btrfs-convert.c @@ -2879,6 +2879,8 @@ static void print_usage(void) printf("\t-L|--copy-label use label from converted filesystem\n"); printf("\t-p|--progress show converting progress (default)\n"); printf("\t-O|--features LIST comma separated list of filesystem features\n"); + printf("\t use '-O list-all' to list features\n"); + printf("\t use '-O comp=|' x.y.z is the minimum kernel version to be supported\n"); printf("\t--no-progress show only overview, not the detailed progress\n"); } @@ -2970,6 +2972,24 @@ int main(int argc, char *argv[]) case 'O': { char *orig = strdup(optarg); char *tmp = orig; + char *tok; + + tok = strtok(tmp, "="); + if (!strcmp(tok, "comp")) { + tok = strtok(NULL, "="); + if (!tok) { + fprintf(stderr, + "Provide a version for 'comp=' option, ref to 'mkfs.btrfs -O list-all'\n"); + exit(1); + } + if (btrfs_features_allowed_by_version(tok, &features) < 0) { + fprintf(stderr, "Wrong version format: '%s'\n", tok); + exit(1); + } + features &= BTRFS_MKFS_DEFAULT_FEATURES; + goto cont; + } + tmp = orig; tmp = btrfs_parse_fs_features(tmp, &features); if (tmp) { @@ -2979,6 +2999,7 @@ int main(int argc, char *argv[]) free(orig); exit(1); } +cont: free(orig); if (features & BTRFS_FEATURE_LIST_ALL) { btrfs_list_all_fs_features( -- 2.6.2