mirror of
https://github.com/koverstreet/bcachefs-tools.git
synced 2025-02-22 00:00:03 +03:00
Fix option parsing so that passing --bucket_size after the device works
This makes supporting -U more annoying; dropping that for the moment, unless someone complains
This commit is contained in:
Kent Overstreet
parent
445032e1b6
commit
335ac31ba5
183
make-bcache.c
183
make-bcache.c
@ -136,7 +136,7 @@ void usage()
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" -B, --bdev Format a backing device\n"
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" -b, --bucket bucket size\n"
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" -w, --block block size (hard sector size of SSD, often 2k)\n"
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" -U UUID\n"
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// " -U UUID\n"
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" --writeback enable writeback\n"
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" --discard enable discards\n"
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" --cache_replacement_policy=(lru|fifo)\n"
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@ -151,37 +151,36 @@ const char * const cache_replacement_policies[] = {
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NULL
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};
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int writeback;
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int discard;
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unsigned cache_replacement_policy;
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uint64_t data_offset = BDEV_DATA_START;
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struct option opts[] = {
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{ "cache", 0, NULL, 'C' },
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{ "bdev", 0, NULL, 'B' },
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{ "bucket", 1, NULL, 'b' },
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{ "block", 1, NULL, 'w' },
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{ "writeback", 0, &writeback, 1 },
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{ "discard", 0, &discard, 1 },
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{ "cache_replacement_policy", 1, NULL, 'p' },
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// { "data_offset", 1, NULL, 'o' },
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{ "help", 0, NULL, 'h' },
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{ NULL, 0, NULL, 0 },
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};
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void write_sb(char *dev, struct cache_sb *sb)
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static void write_sb(char *dev, unsigned block_size, unsigned bucket_size,
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bool writeback, bool discard,
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unsigned cache_replacement_policy,
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uint64_t data_offset,
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uuid_t set_uuid, bool bdev)
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{
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int fd;
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char uuid[40], set_uuid[40];
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char uuid_str[40], set_uuid_str[40];
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struct cache_sb sb;
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if (sb->version > BCACHE_SB_MAX_VERSION) {
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printf("Must specify one of -C or -B\n");
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usage();
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}
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memset(&sb, 0, sizeof(struct cache_sb));
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if (sb->bucket_size < sb->block_size) {
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printf("Bucket size cannot be smaller than block size\n");
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exit(EXIT_FAILURE);
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sb.version = bdev ? CACHE_BACKING_DEV : 0;
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sb.bucket_size = bucket_size;
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sb.block_size = block_size;
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uuid_generate(sb.uuid);
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memcpy(sb.set_uuid, set_uuid, sizeof(sb.set_uuid));
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if (SB_BDEV(&sb)) {
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SET_BDEV_WRITEBACK(&sb, writeback);
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if (data_offset != BDEV_DATA_START) {
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sb.version = BCACHE_SB_BDEV_VERSION;
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sb.keys = 1;
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sb.d[0] = data_offset;
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}
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} else {
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SET_CACHE_DISCARD(&sb, discard);
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SET_CACHE_REPLACEMENT(&sb, cache_replacement_policy);
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}
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if ((fd = open(dev, O_RDWR|O_EXCL)) == -1) {
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@ -189,106 +188,108 @@ void write_sb(char *dev, struct cache_sb *sb)
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exit(EXIT_FAILURE);
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}
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sb->flags = 0;
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sb.offset = SB_SECTOR;
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memcpy(sb.magic, bcache_magic, 16);
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sb.nbuckets = getblocks(fd) / sb.bucket_size;
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sb.nr_in_set = 1;
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sb.first_bucket = (23 / sb.bucket_size) + 1;
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sb.csum = csum_set(&sb);
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if (SB_BDEV(sb)) {
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SET_BDEV_WRITEBACK(sb, writeback);
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if (data_offset != BDEV_DATA_START) {
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sb->version = BCACHE_SB_BDEV_VERSION;
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sb->keys = 1;
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sb->d[0] = data_offset;
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}
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} else {
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SET_CACHE_DISCARD(sb, discard);
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SET_CACHE_REPLACEMENT(sb, cache_replacement_policy);
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}
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sb->offset = SB_SECTOR;
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memcpy(sb->magic, bcache_magic, 16);
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sb->nbuckets = getblocks(fd) / sb->bucket_size;
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sb->nr_in_set = 1;
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sb->first_bucket = (23 / sb->bucket_size) + 1;
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uuid_unparse(sb->uuid, uuid);
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uuid_unparse(sb->set_uuid, set_uuid);
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sb->csum = csum_set(sb);
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if (sb->nbuckets < 1 << 7) {
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if (sb.nbuckets < 1 << 7) {
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printf("Not enough buckets: %ju, need %u\n",
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sb->nbuckets, 1 << 7);
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sb.nbuckets, 1 << 7);
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exit(EXIT_FAILURE);
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}
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uuid_unparse(sb.uuid, uuid_str);
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uuid_unparse(sb.set_uuid, set_uuid_str);
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printf("UUID: %s\n"
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"Set UUID: %s\n"
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"version: %u\n"
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"nbuckets: %ju\n"
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"block_size: %u\n"
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"bucket_size: %u\n"
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"nr_in_set: %u\n"
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"nr_this_dev: %u\n"
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"first_bucket: %u\n",
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uuid, set_uuid,
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sb->nbuckets,
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sb->block_size,
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sb->bucket_size,
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sb->nr_in_set,
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sb->nr_this_dev,
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sb->first_bucket);
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uuid_str, set_uuid_str,
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(unsigned) sb.version,
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sb.nbuckets,
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sb.block_size,
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sb.bucket_size,
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sb.nr_in_set,
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sb.nr_this_dev,
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sb.first_bucket);
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if (pwrite(fd, sb, sizeof(*sb), SB_SECTOR << 9) != sizeof(*sb)) {
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if (pwrite(fd, &sb, sizeof(sb), SB_SECTOR << 9) != sizeof(sb)) {
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perror("write error\n");
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exit(EXIT_FAILURE);
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}
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fsync(fd);
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close(fd);
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uuid_generate(sb->uuid);
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}
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int main(int argc, char **argv)
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{
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bool written = false;
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int c;
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struct cache_sb sb;
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int c, bdev = -1;
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unsigned i, ncache_devices = 0, nbacking_devices = 0;
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char *cache_devices[argc];
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char *backing_devices[argc];
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memset(&sb, 0, sizeof(struct cache_sb));
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sb.version = -1;
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sb.block_size = 1;
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sb.bucket_size = 1024;
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unsigned block_size = 1, bucket_size = 1024;
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int writeback = 0, discard = 0;
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unsigned cache_replacement_policy = 0;
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uint64_t data_offset = BDEV_DATA_START;
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uuid_t set_uuid;
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uuid_generate(sb.uuid);
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uuid_generate(sb.set_uuid);
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uuid_generate(set_uuid);
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struct option opts[] = {
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{ "cache", 0, NULL, 'C' },
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{ "bdev", 0, NULL, 'B' },
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{ "bucket", 1, NULL, 'b' },
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{ "block", 1, NULL, 'w' },
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{ "writeback", 0, &writeback, 1 },
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{ "discard", 0, &discard, 1 },
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{ "cache_replacement_policy", 1, NULL, 'p' },
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{ "data_offset", 1, NULL, 'o' },
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{ "help", 0, NULL, 'h' },
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{ NULL, 0, NULL, 0 },
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};
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while ((c = getopt_long(argc, argv,
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"-hCBU:w:b:",
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opts, NULL)) != -1)
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switch (c) {
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case 'C':
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sb.version = 0;
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bdev = 0;
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break;
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case 'B':
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sb.version = CACHE_BACKING_DEV;
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bdev = 1;
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break;
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case 'b':
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sb.bucket_size = hatoi_validate(optarg, "bucket size");
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bucket_size = hatoi_validate(optarg, "bucket size");
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break;
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case 'w':
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sb.block_size = hatoi_validate(optarg, "block size");
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block_size = hatoi_validate(optarg, "block size");
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break;
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#if 0
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case 'U':
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if (uuid_parse(optarg, sb.uuid)) {
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printf("Bad uuid\n");
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exit(EXIT_FAILURE);
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}
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break;
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#endif
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case 'p':
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cache_replacement_policy = read_string_list(optarg,
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cache_replacement_policies);
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break;
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case 'o':
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data_offset = atoll(optarg);
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if (sb.d[0] < BDEV_DATA_START) {
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if (data_offset < BDEV_DATA_START) {
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printf("Bad data offset; minimum %d sectors\n", BDEV_DATA_START);
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exit(EXIT_FAILURE);
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}
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@ -297,15 +298,37 @@ int main(int argc, char **argv)
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usage();
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break;
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case 1:
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write_sb(optarg, &sb);
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written = true;
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if (bdev == -1) {
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printf("Please specify -C or -B\n");
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exit(EXIT_FAILURE);
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}
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if (bdev)
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backing_devices[nbacking_devices++] = optarg;
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else
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cache_devices[ncache_devices++] = optarg;
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break;
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}
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if (!written) {
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if (!ncache_devices && !nbacking_devices) {
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printf("Please supply a device\n");
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usage();
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}
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if (bucket_size < block_size) {
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printf("Bucket size cannot be smaller than block size\n");
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exit(EXIT_FAILURE);
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}
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for (i = 0; i < ncache_devices; i++)
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write_sb(cache_devices[i], block_size, bucket_size,
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writeback, discard, cache_replacement_policy,
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data_offset, set_uuid, false);
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for (i = 0; i < nbacking_devices; i++)
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write_sb(backing_devices[i], block_size, bucket_size,
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writeback, discard, cache_replacement_policy,
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data_offset, set_uuid, true);
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return 0;
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}
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