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/*
* Authors: Kent Overstreet <kent.overstreet@gmail.com>
* Gabriel de Perthuis <g2p.code@gmail.com>
* Jacob Malevich <jam@datera.io>
*
* GPLv2
*/
#include <errno.h>
#include <stdbool.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/types.h>
#include <unistd.h>
#include <uuid/uuid.h>
#include <nih/command.h>
#include <nih/option.h>
#include "ccan/darray/darray.h"
#include "bcache.h"
#include "libbcache.h"
#include "bcache-format.h"
#include "crypto.h"
/* All in units of 512 byte sectors */
static darray(struct dev_opts) cache_devices;
static unsigned block_size, btree_node_size;
static unsigned meta_csum_type = BCH_CSUM_CRC32C;
static unsigned data_csum_type = BCH_CSUM_CRC32C;
static unsigned compression_type = BCH_COMPRESSION_NONE;
static int encrypted;
static unsigned meta_replicas = 1, data_replicas = 1;
static unsigned on_error_action;
static char *label = NULL;
static uuid_le uuid;
/* Device specific options: */
static u64 filesystem_size;
static unsigned bucket_size;
static unsigned tier;
static unsigned replacement_policy;
static int discard;
static int set_cache(NihOption *option, const char *arg)
{
darray_append(cache_devices, (struct dev_opts) {
.fd = dev_open(arg),
.dev = strdup(arg),
.size = filesystem_size,
.bucket_size = bucket_size,
.tier = tier,
.replacement_policy = replacement_policy,
.discard = discard,
});
return 0;
}
static int set_uuid(NihOption *option, const char *arg)
{
if (uuid_parse(arg, uuid.b))
die("Bad uuid");
return 0;
}
static int set_block_size(NihOption *option, const char *arg)
{
block_size = hatoi_validate(arg, "block size");
return 0;
}
static int set_bucket_sizes(NihOption *option, const char *arg)
{
bucket_size = hatoi_validate(arg, "bucket size");
return 0;
}
static int set_btree_node_size(NihOption *option, const char *arg)
{
btree_node_size = hatoi_validate(arg, "btree node size");
return 0;
}
static int set_filesystem_size(NihOption *option, const char *arg)
{
filesystem_size = hatoi(arg) >> 9;
return 0;
}
static int set_replacement_policy(NihOption *option, const char *arg)
{
replacement_policy = read_string_list_or_die(arg, replacement_policies,
"replacement policy");
return 0;
}
static int set_csum_type(NihOption *option, const char *arg)
{
unsigned *csum_type = option->value;
*csum_type = read_string_list_or_die(arg, csum_types, "checksum type");
return 0;
}
static int set_compression_type(NihOption *option, const char *arg)
{
compression_type = read_string_list_or_die(arg, compression_types,
"compression type");
return 0;
}
static int set_on_error_action(NihOption *option, const char *arg)
{
on_error_action = read_string_list_or_die(arg, error_actions,
"error action");
return 0;
}
static int set_tier(NihOption *option, const char *arg)
{
tier = strtoul_or_die(arg, CACHE_TIERS, "tier");
return 0;
}
static int set_meta_replicas(NihOption *option, const char *arg)
{
meta_replicas = strtoul_or_die(arg, CACHE_SET_META_REPLICAS_WANT_MAX,
"meta_replicas");
return 0;
}
static int set_data_replicas(NihOption *option, const char *arg)
{
data_replicas = strtoul_or_die(arg, CACHE_SET_DATA_REPLICAS_WANT_MAX,
"data_replicas");
return 0;
}
NihOption opts_format[] = {
// { int shortoption, char *longoption, char *help, NihOptionGroup, char *argname, void *value, NihOptionSetter}
{ 'C', "cache", N_("Format a cache device"),
NULL, "dev", NULL, set_cache },
{ 'w', "block", N_("block size"),
NULL, "size", NULL, set_block_size },
{ 'n', "btree_node", N_("Btree node size, default 256k"),
NULL, "size", NULL, set_btree_node_size },
{ 0, "metadata_csum_type", N_("Checksum type"),
NULL, "(none|crc32c|crc64)", &meta_csum_type, set_csum_type },
{ 0, "data_csum_type", N_("Checksum type"),
NULL, "(none|crc32c|crc64)", &data_csum_type, set_csum_type },
{ 0, "compression_type", N_("Compression type"),
NULL, "(none|gzip)", NULL, set_compression_type },
{ 0, "encrypted", N_("enable encryption"),
NULL, NULL, &encrypted, NULL },
{ 0, "meta_replicas", N_("number of metadata replicas"),
NULL, "#", NULL, set_meta_replicas },
{ 0, "data_replicas", N_("number of data replicas"),
NULL, "#", NULL, set_data_replicas },
{ 0, "error_action", N_("Action to take on filesystem error"),
NULL, "(continue|readonly|panic)", NULL, set_on_error_action },
{ 'l', "label", N_("label"),
NULL, "label", &label, NULL},
{ 0, "uuid", N_("filesystem UUID"),
NULL, "uuid", NULL, set_uuid },
/* Device specific options: */
{ 0, "fs_size", N_("Size of filesystem on device" ),
NULL, "size", NULL, set_filesystem_size },
{ 'b', "bucket", N_("bucket size"),
NULL, "size", NULL, set_bucket_sizes },
{ 't', "tier", N_("tier of subsequent devices"),
NULL, "#", NULL, set_tier },
{ 'p', "cache_replacement_policy", NULL,
NULL, "(lru|fifo|random)", NULL, set_replacement_policy },
{ 0, "discard", N_("Enable discards"),
NULL, NULL, &discard, NULL },
NIH_OPTION_LAST
};
int cmd_format(NihCommand *command, char * const *args)
{
char *passphrase = NULL;
if (!darray_size(cache_devices))
die("Please supply a device");
if (uuid_is_null(uuid.b))
uuid_generate(uuid.b);
if (encrypted) {
char *pass2;
passphrase = read_passphrase("Enter passphrase: ");
pass2 = read_passphrase("Enter same passphrase again: ");
if (strcmp(passphrase, pass2)) {
memzero_explicit(passphrase, strlen(passphrase));
memzero_explicit(pass2, strlen(pass2));
die("Passphrases do not match");
}
memzero_explicit(pass2, strlen(pass2));
free(pass2);
}
bcache_format(cache_devices.item, darray_size(cache_devices),
block_size,
btree_node_size,
meta_csum_type,
data_csum_type,
compression_type,
passphrase,
meta_replicas,
data_replicas,
on_error_action,
label,
uuid);
if (passphrase) {
memzero_explicit(passphrase, strlen(passphrase));
free(passphrase);
}
return 0;
}
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