*
* GPLv2
*/
-
#include <errno.h>
+#include <fcntl.h>
+#include <getopt.h>
#include <stdbool.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
+#include <sys/stat.h>
#include <sys/types.h>
#include <unistd.h>
+#include <blkid.h>
#include <uuid/uuid.h>
-#include <nih/command.h>
-#include <nih/option.h>
-
#include "ccan/darray/darray.h"
-#include "bcache.h"
+#include "bcache-cmds.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)
+/* Open a block device, do magic blkid stuff: */
+static int open_for_format(const char *dev, bool force)
{
- 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;
-}
+ blkid_probe pr;
+ const char *fs_type = NULL, *fs_label = NULL;
+ size_t fs_type_len, fs_label_len;
+ int fd;
+
+ if ((fd = open(dev, O_RDWR|O_EXCL)) == -1)
+ die("Can't open dev %s: %s\n", dev, strerror(errno));
+
+ if (force)
+ return fd;
+
+ if (!(pr = blkid_new_probe()))
+ die("blkid error 1");
+ if (blkid_probe_set_device(pr, fd, 0, 0))
+ die("blkid error 2");
+ if (blkid_probe_enable_partitions(pr, true))
+ die("blkid error 3");
+ if (blkid_do_fullprobe(pr) < 0)
+ die("blkid error 4");
+
+ blkid_probe_lookup_value(pr, "TYPE", &fs_type, &fs_type_len);
+ blkid_probe_lookup_value(pr, "LABEL", &fs_label, &fs_label_len);
+
+ if (fs_type) {
+ if (fs_label)
+ printf("%s contains a %s filesystem labelled '%s'\n",
+ dev, fs_type, fs_label);
+ else
+ printf("%s contains a %s filesystem\n",
+ dev, fs_type);
+ if (!ask_proceed())
+ exit(EXIT_FAILURE);
+ }
-static int set_compression_type(NihOption *option, const char *arg)
-{
- compression_type = read_string_list_or_die(arg, compression_types,
- "compression type");
- return 0;
+ blkid_free_probe(pr);
+ return fd;
}
-static int set_on_error_action(NihOption *option, const char *arg)
+static void usage(void)
{
- on_error_action = read_string_list_or_die(arg, error_actions,
- "error action");
- return 0;
+ puts("bcache format - create a new bcache filesystem on one or more devices\n"
+ "Usage: bcache format [OPTION]... <devices>\n"
+ "\n"
+ "Options:\n"
+ " -b, --block=size\n"
+ " --btree_node=size Btree node size, default 256k\n"
+ " --metadata_checksum_type=(none|crc32c|crc64)\n"
+ " --data_checksum_type=(none|crc32c|crc64)\n"
+ " --compression_type=(none|lz4|gzip)\n"
+ " --error_action=(continue|readonly|panic)\n"
+ " Action to take on filesystem error\n"
+ " --max_journal_entry_size=size\n"
+ " -l, --label=label\n"
+ " --uuid=uuid\n"
+ " -f, --force\n"
+ "\n"
+ "Device specific options:\n"
+ " --fs_size=size Size of filesystem on device\n"
+ " --bucket=size bucket size\n"
+ " --discard Enable discards\n"
+ " -t, --tier=# tier of subsequent devices\n"
+ "\n"
+ " -h, --help display this help and exit\n"
+ "\n"
+ "Device specific options must come before corresponding devices, e.g.\n"
+ " bcache format --tier 0 /dev/sdb --tier 1 /dev/sdc\n"
+ "\n"
+ "Report bugs to <linux-bcache@vger.kernel.org>");
+ exit(EXIT_SUCCESS);
}
-static int set_tier(NihOption *option, const char *arg)
-{
- tier = strtoul_or_die(arg, CACHE_TIERS, "tier");
- return 0;
-}
+#define OPTS \
+ OPT('b', block_size, required_argument) \
+ OPT(0, btree_node_size, required_argument) \
+ OPT(0, metadata_checksum_type, required_argument) \
+ OPT(0, data_checksum_type, required_argument) \
+ OPT(0, compression_type, required_argument) \
+ OPT('e', error_action, required_argument) \
+ OPT(0, max_journal_entry_size, required_argument) \
+ OPT('L', label, required_argument) \
+ OPT('U', uuid, required_argument) \
+ OPT('f', force, no_argument) \
+ OPT(0, fs_size, required_argument) \
+ OPT(0, bucket_size, required_argument) \
+ OPT('t', tier, required_argument) \
+ OPT(0, discard, no_argument) \
+ OPT('h', help, no_argument)
+
+enum {
+ Opt_no_opt = 1,
+#define OPT(shortopt, longopt, has_arg) Opt_##longopt,
+ OPTS
+#undef OPT
+};
-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 const struct option format_opts[] = {
+#define OPT(shortopt, longopt, has_arg) { \
+ #longopt, has_arg, NULL, Opt_##longopt \
+ },
+ OPTS
+#undef OPT
+ { NULL }
+};
-static int set_data_replicas(NihOption *option, const char *arg)
+int cmd_format(int argc, char *argv[])
{
- 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 },
+ darray(struct dev_opts) devices;
+ struct dev_opts *dev;
+ unsigned block_size = 0;
+ unsigned btree_node_size = 0;
+ unsigned meta_csum_type = BCH_CSUM_CRC32C;
+ unsigned data_csum_type = BCH_CSUM_CRC32C;
+ unsigned compression_type = BCH_COMPRESSION_NONE;
+ unsigned on_error_action = BCH_ON_ERROR_RO;
+ char *label = NULL;
+ uuid_le uuid;
+ bool force = false;
/* 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)
-{
+ u64 filesystem_size = 0;
+ unsigned bucket_size = 0;
+ unsigned tier = 0;
+ bool discard = false;
+ unsigned max_journal_entry_size = 0;
char *passphrase = NULL;
+ int opt;
+
+ darray_init(devices);
+ uuid_clear(uuid.b);
+
+ while ((opt = getopt_long(argc, argv,
+ "-b:e:L:U:ft:h",
+ format_opts,
+ NULL)) != -1)
+ switch (opt) {
+ case Opt_block_size:
+ case 'b':
+ block_size = hatoi_validate(optarg,
+ "block size");
+ break;
+ case Opt_btree_node_size:
+ btree_node_size = hatoi_validate(optarg,
+ "btree node size");
+ break;
+ case Opt_metadata_checksum_type:
+ meta_csum_type = read_string_list_or_die(optarg,
+ csum_types, "checksum type");
+ break;
+ case Opt_data_checksum_type:
+ data_csum_type = read_string_list_or_die(optarg,
+ csum_types, "checksum type");
+ break;
+ case Opt_compression_type:
+ compression_type = read_string_list_or_die(optarg,
+ compression_types, "compression type");
+ break;
+ case Opt_error_action:
+ case 'e':
+ on_error_action = read_string_list_or_die(optarg,
+ error_actions, "error action");
+ break;
+ case Opt_max_journal_entry_size:
+ max_journal_entry_size = hatoi_validate(optarg,
+ "journal entry size");
+ break;
+ case Opt_label:
+ case 'L':
+ label = strdup(optarg);
+ break;
+ case Opt_uuid:
+ case 'U':
+ if (uuid_parse(optarg, uuid.b))
+ die("Bad uuid");
+ break;
+ case Opt_force:
+ case 'f':
+ force = true;
+ break;
+ case Opt_fs_size:
+ filesystem_size = hatoi(optarg) >> 9;
+ break;
+ case Opt_bucket_size:
+ bucket_size = hatoi_validate(optarg, "bucket size");
+ break;
+ case Opt_tier:
+ case 't':
+ tier = strtoul_or_die(optarg, CACHE_TIERS, "tier");
+ break;
+ case Opt_discard:
+ discard = true;
+ break;
+ case Opt_no_opt:
+ darray_append(devices, (struct dev_opts) {
+ .path = strdup(optarg),
+ .size = filesystem_size,
+ .bucket_size = bucket_size,
+ .tier = tier,
+ .discard = discard,
+ });
+ break;
+ case Opt_help:
+ case 'h':
+ usage();
+ break;
+ }
- if (!darray_size(cache_devices))
+ if (!darray_size(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);
- }
+ darray_foreach(dev, devices)
+ dev->fd = open_for_format(dev->path, force);
- bcache_format(cache_devices.item, darray_size(cache_devices),
+ bcache_format(devices.item, darray_size(devices),
block_size,
btree_node_size,
meta_csum_type,
data_csum_type,
compression_type,
- passphrase,
- meta_replicas,
- data_replicas,
+ 1,
+ 1,
on_error_action,
+ max_journal_entry_size,
label,
uuid);
projects / bcachefs-tools-debian / blobdiff