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btrfs-progs: mkfs: new option to specify checksum type

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Add an option to mkfs to specify which checksum algorithm will be used
for the filesystem. Currently only crc32c is supported.

The option name is -c, presumably one of the comonly used options so it
gets the lowercase option.

Signed-off-by: Johannes Thumshirn <jthumshirn@suse.de>
Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
Johannes Thumshirn 2019-09-03 17:00:42 +02:00 committed by David Sterba
parent ed33908b44
commit 56198f3a9d
3 changed files with 26 additions and 3 deletions
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2
convert/common.c
View File

@ -135,7 +135,7 @@ static int setup_temp_super(int fd, struct btrfs_mkfs_config *cfg,
super->__unused_leafsize = cpu_to_le32(cfg->nodesize);
btrfs_set_super_nodesize(super, cfg->nodesize);
btrfs_set_super_stripesize(super, cfg->stripesize);
btrfs_set_super_csum_type(super, BTRFS_CSUM_TYPE_CRC32);
btrfs_set_super_csum_type(super, cfg->csum_type);
btrfs_set_super_chunk_root(super, chunk_bytenr);
btrfs_set_super_cache_generation(super, -1);
btrfs_set_super_incompat_flags(super, cfg->features);

2
mkfs/common.c
View File

@ -202,7 +202,7 @@ int make_btrfs(int fd, struct btrfs_mkfs_config *cfg)
super.__unused_leafsize = cpu_to_le32(cfg->nodesize);
btrfs_set_super_nodesize(&super, cfg->nodesize);
btrfs_set_super_stripesize(&super, cfg->stripesize);
btrfs_set_super_csum_type(&super, BTRFS_CSUM_TYPE_CRC32);
btrfs_set_super_csum_type(&super, cfg->csum_type);
btrfs_set_super_chunk_root_generation(&super, 1);
btrfs_set_super_cache_generation(&super, -1);
btrfs_set_super_incompat_flags(&super, cfg->features);

25
mkfs/main.c
View File

@ -341,6 +341,8 @@ static void print_usage(int ret)
printf("\t-m|--metadata PROFILE metadata profile, values like for data profile\n");
printf("\t-M|--mixed mix metadata and data together\n");
printf(" features:\n");
printf("\t--csum TYPE\n");
printf("\t--checksum TYPE checksum algorithm to use (default: crc32c)\n");
printf("\t-n|--nodesize SIZE size of btree nodes\n");
printf("\t-s|--sectorsize SIZE data block size (may not be mountable by current kernel)\n");
printf("\t-O|--features LIST comma separated list of filesystem features (use '-O list-all' to list features)\n");
@ -386,6 +388,18 @@ static u64 parse_profile(const char *s)
return 0;
}
static enum btrfs_csum_type parse_csum_type(const char *s)
{
if (strcasecmp(s, "crc32c") == 0) {
return BTRFS_CSUM_TYPE_CRC32;
} else {
error("unknown csum type %s", s);
exit(1);
}
/* not reached */
return 0;
}
static char *parse_label(const char *input)
{
int len = strlen(input);
@ -832,15 +846,20 @@ int BOX_MAIN(mkfs)(int argc, char **argv)
u64 features = BTRFS_MKFS_DEFAULT_FEATURES;
struct mkfs_allocation allocation = { 0 };
struct btrfs_mkfs_config mkfs_cfg;
enum btrfs_csum_type csum_type = BTRFS_CSUM_TYPE_CRC32;
crc32c_optimization_init();
while(1) {
int c;
enum { GETOPT_VAL_SHRINK = 257 };
enum { GETOPT_VAL_SHRINK = 257, GETOPT_VAL_CHECKSUM };
static const struct option long_options[] = {
{ "alloc-start", required_argument, NULL, 'A'},
{ "byte-count", required_argument, NULL, 'b' },
{ "csum", required_argument, NULL,
GETOPT_VAL_CHECKSUM },
{ "checksum", required_argument, NULL,
GETOPT_VAL_CHECKSUM },
{ "force", no_argument, NULL, 'f' },
{ "leafsize", required_argument, NULL, 'l' },
{ "label", required_argument, NULL, 'L'},
@ -938,6 +957,9 @@ int BOX_MAIN(mkfs)(int argc, char **argv)
case GETOPT_VAL_SHRINK:
shrink_rootdir = true;
break;
case GETOPT_VAL_CHECKSUM:
csum_type = parse_csum_type(optarg);
break;
case GETOPT_VAL_HELP:
default:
print_usage(c != GETOPT_VAL_HELP);
@ -1177,6 +1199,7 @@ int BOX_MAIN(mkfs)(int argc, char **argv)
mkfs_cfg.sectorsize = sectorsize;
mkfs_cfg.stripesize = stripesize;
mkfs_cfg.features = features;
mkfs_cfg.csum_type = csum_type;
ret = make_btrfs(fd, &mkfs_cfg);
if (ret) {