@@ -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>|<x.y.z>' 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(
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 <anand.jain@oracle.com> --- btrfs-convert.c | 21 +++++++++++++++++++++ 1 file changed, 21 insertions(+)