mirror of
https://github.com/koverstreet/bcachefs-tools.git
synced 2025-03-10 00:00:04 +03:00
manual merge
Change-Id: I75355d4671c46edbb2a6a64a7a8b6217d02d4c12
This commit is contained in:
commit
06a26b58fe
36
Makefile.am
36
Makefile.am
@ -2,34 +2,43 @@
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AUTOMAKE_OPTIONS=subdir-objects
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PREFIX=/usr
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AM_CFLAGS=-O2 -Wall -g -std=gnu99
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AM_CFLAGS=-std=gnu99 `pkg-config --cflags uuid blkid`
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AM_LDFLAGS=`pkg-config --libs uuid blkid` -L$(top_builddir)
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bin_PROGRAMS=make-bcache \
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probe-bcache \
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bcache-super-show \
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bcachectl
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bcachectl \
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bcacheadm
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noinst_PROGRAMS=bcache-test
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make_bcache_SOURCES=make-bcache.c bcache.c
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make_bcache_LDFLAGS=`pkg-config --libs uuid blkid`
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make_bcache_CFLAGS=$(AM_CFLAGS) `pkg-config --cflags uuid blkid`
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lib_LIBRARIES=libbcache.a
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libbcache_a_SOURCES=bcache.c
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bcache_LDADD=libbcache.a
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probe_bcache_SOURCES=probe-bcache.c bcache.c
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probe_bcache_LDFLAGS=`pkg-config --libs uuid blkid`
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probe_bcache_CFLAGS=$(AM_CFLAGS) `pkg-config --cflags uuid blkid`
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make_bcache_SOURCES=make-bcache.c
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make_bcache_LDADD=libbcache.a
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bcache_super_show_SOURCES=bcache-super-show.c bcache.c
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bcache_super_show_LDFLAGS=`pkg-config --libs uuid`
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bcache_super_show_CFLAGS=$(AM_CFLAGS) `pkg-config --cflags uuid`
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probe_bcache_SOURCES=probe-bcache.c
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probe_bcache_LDADD=libbcache.a
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bcache_super_show_SOURCES=bcache-super-show.c
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bcache_super_show_LDADD=libbcache.a
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bcachectl_SOURCES=bcachectl.c
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bcache_test_SOURCE=bcache-test.c
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bcache_test_SOURCES=bcache-test.c
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bcache_test_LDFLAGS=-lm `pkg-config --libs openssl`
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bcache_test_CFLAGS=$(AM_CFLAGS) `pkg-config --cflags openssl`
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bcacheadm_SOURCES=bcacheadm.c
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bcacheadm_CFLAGS=$(AM_CFLAGS) -g
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bcacheadm_LDFLAGS=$(AM_LDFLAGS) -lnih
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bcacheadm_LDADD=libbcache.a
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udevrule_DATA=69-bcache.rules
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udevruledir=$(prefix)/lib/udev/rules.d
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@ -41,7 +50,8 @@ initramfsdir=$(prefix)/etc/initramfs-tools/hooks/
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man8_MANS= bcache-super-show.8 \
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make-bcache.8 \
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probe-bcache.8
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probe-bcache.8 \
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bcacheadm.8
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include ../../../../../../../../../../usr/share/DateraContainer/Makefile.rpm
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# some version of automake don't like absolute path names for included makefiles
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|
@ -27,174 +27,18 @@
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#include "bcache.h"
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static bool force_csum = false;
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static void usage()
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void usage()
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{
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fprintf(stderr, "Usage: bcache-super-show [-f] <device>\n");
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}
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static void print_encode(char *in)
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{
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for (char *pos = in; *pos; pos++)
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if (isalnum(*pos) || strchr(".-_", *pos))
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putchar(*pos);
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else
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printf("%%%x", *pos);
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}
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static void show_super_common(struct cache_sb *sb)
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{
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char uuid[40];
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char label[SB_LABEL_SIZE + 1];
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uint64_t expected_csum;
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printf("sb.magic\t\t");
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if (!memcmp(&sb->magic, &BCACHE_MAGIC, sizeof(sb->magic))) {
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printf("ok\n");
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} else {
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printf("bad magic\n");
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fprintf(stderr, "Invalid superblock (bad magic)\n");
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exit(2);
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}
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printf("sb.first_sector\t\t%ju", (uint64_t) sb->offset);
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if (sb->offset == SB_SECTOR) {
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printf(" [match]\n");
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} else {
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printf(" [expected %ds]\n", SB_SECTOR);
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fprintf(stderr, "Invalid superblock (bad sector)\n");
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exit(2);
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}
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printf("sb.csum\t\t\t%ju", (uint64_t) sb->csum);
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expected_csum = csum_set(sb,
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sb->version < BCACHE_SB_VERSION_CDEV_V3
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? BCH_CSUM_CRC64
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: CACHE_SB_CSUM_TYPE(sb));
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if (sb->csum == expected_csum) {
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printf(" [match]\n");
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} else {
|
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printf(" [expected %" PRIX64 "]\n", expected_csum);
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if (!force_csum) {
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fprintf(stderr, "Corrupt superblock (bad csum)\n");
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exit(2);
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}
|
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}
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printf("sb.version\t\t%ju", (uint64_t) sb->version);
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switch (sb->version) {
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// These are handled the same by the kernel
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case BCACHE_SB_VERSION_CDEV:
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case BCACHE_SB_VERSION_CDEV_WITH_UUID:
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printf(" [cache device]\n");
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break;
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// The second adds data offset support
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case BCACHE_SB_VERSION_BDEV:
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case BCACHE_SB_VERSION_BDEV_WITH_OFFSET:
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printf(" [backing device]\n");
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break;
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default:
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printf(" [unknown]\n");
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// exit code?
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exit(EXIT_SUCCESS);
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}
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putchar('\n');
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strncpy(label, (char *) sb->label, SB_LABEL_SIZE);
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label[SB_LABEL_SIZE] = '\0';
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printf("dev.label\t\t");
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if (*label)
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print_encode(label);
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else
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printf("(empty)");
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putchar('\n');
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uuid_unparse(sb->uuid.b, uuid);
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printf("dev.uuid\t\t%s\n", uuid);
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uuid_unparse(sb->set_uuid.b, uuid);
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printf("cset.uuid\t\t%s\n", uuid);
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}
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static void show_super_backingdev(struct cache_sb *sb)
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{
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uint64_t first_sector;
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show_super_common(sb);
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if (sb->version == BCACHE_SB_VERSION_BDEV) {
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first_sector = BDEV_DATA_START_DEFAULT;
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} else {
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if (sb->keys == 1 || sb->d[0]) {
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fprintf(stderr,
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"Possible experimental format detected, bailing\n");
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exit(3);
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}
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first_sector = sb->data_offset;
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}
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printf("dev.data.first_sector\t%ju\n"
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"dev.data.cache_mode\t%s"
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"dev.data.cache_state\t%s\n",
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first_sector,
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bdev_cache_mode[BDEV_CACHE_MODE(sb)],
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bdev_state[BDEV_STATE(sb)]);
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||||
}
|
||||
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static void show_cache_member(struct cache_sb *sb, unsigned i)
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{
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struct cache_member *m = ((struct cache_member *) sb->d) + i;
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printf("cache.state\t%s\n", cache_state[CACHE_STATE(m)]);
|
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printf("cache.tier\t%llu\n", CACHE_TIER(m));
|
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||||
printf("cache.replication_set\t%llu\n", CACHE_REPLICATION_SET(m));
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printf("cache.cur_meta_replicas\t%llu\n", REPLICATION_SET_CUR_META_REPLICAS(m));
|
||||
printf("cache.cur_data_replicas\t%llu\n", REPLICATION_SET_CUR_DATA_REPLICAS(m));
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printf("cache.has_metadata\t%llu\n", CACHE_HAS_METADATA(m));
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printf("cache.has_data\t%llu\n", CACHE_HAS_DATA(m));
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printf("cache.replacement\t%s\n", replacement_policies[CACHE_REPLACEMENT(m)]);
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printf("cache.discard\t%llu\n", CACHE_DISCARD(m));
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}
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static void show_super_cache(struct cache_sb *sb)
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{
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show_super_common(sb);
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printf("dev.sectors_per_block\t%u\n"
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"dev.sectors_per_bucket\t%u\n",
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sb->block_size,
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sb->bucket_size);
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||||
// total_sectors includes the superblock;
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printf("dev.cache.first_sector\t%u\n"
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"dev.cache.cache_sectors\t%llu\n"
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"dev.cache.total_sectors\t%llu\n"
|
||||
"dev.cache.ordered\t%s\n"
|
||||
"dev.cache.pos\t\t%u\n"
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||||
"dev.cache.setsize\t\t%u\n",
|
||||
sb->bucket_size * sb->first_bucket,
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sb->bucket_size * (sb->nbuckets - sb->first_bucket),
|
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sb->bucket_size * sb->nbuckets,
|
||||
CACHE_SYNC(sb) ? "yes" : "no",
|
||||
sb->nr_this_dev,
|
||||
sb->nr_in_set);
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show_cache_member(sb, sb->nr_this_dev);
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}
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|
||||
int main(int argc, char **argv)
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||||
{
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||||
int o;
|
||||
extern char *optarg;
|
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struct cache_sb sb_stack, *sb = &sb_stack;
|
||||
size_t bytes = sizeof(*sb);
|
||||
bool force_csum = false;
|
||||
|
||||
while ((o = getopt(argc, argv, "f")) != EOF)
|
||||
switch (o) {
|
||||
@ -237,9 +81,9 @@ int main(int argc, char **argv)
|
||||
}
|
||||
|
||||
if (!SB_IS_BDEV(sb))
|
||||
show_super_cache(sb);
|
||||
show_super_cache(sb, force_csum);
|
||||
else
|
||||
show_super_backingdev(sb);
|
||||
show_super_backingdev(sb, force_csum);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
@ -7,7 +7,7 @@ License: GPL
|
||||
Group: tools
|
||||
BuildRoot: %{_tmppath}/%{name}-root
|
||||
Requires: libblkid
|
||||
BuildRequires: pkgconfig libblkid-devel linux-headers
|
||||
BuildRequires: pkgconfig libblkid-devel linux-headers libnih-devel
|
||||
Summary: tools to manage bcache
|
||||
|
||||
|
||||
|
877
bcache.c
877
bcache.c
@ -5,10 +5,27 @@
|
||||
#include <stdio.h>
|
||||
#include <stdlib.h>
|
||||
#include <stdint.h>
|
||||
#include <fcntl.h>
|
||||
#include <inttypes.h>
|
||||
#include <getopt.h>
|
||||
#include <limits.h>
|
||||
#include <linux/fs.h>
|
||||
#include <stdbool.h>
|
||||
#include <string.h>
|
||||
#include <sys/ioctl.h>
|
||||
#include <sys/types.h>
|
||||
#include <sys/stat.h>
|
||||
#include <dirent.h>
|
||||
#include <unistd.h>
|
||||
#include <uuid/uuid.h>
|
||||
#include <blkid.h>
|
||||
|
||||
#include "bcache.h"
|
||||
|
||||
#define __KERNEL__
|
||||
#include <linux/bcache-ioctl.h>
|
||||
#undef __KERNEL__
|
||||
|
||||
const char * const cache_state[] = {
|
||||
"active",
|
||||
"ro",
|
||||
@ -351,3 +368,863 @@ uint64_t bch_checksum(unsigned type, const void *data, size_t len)
|
||||
|
||||
return crc ^ 0xffffffffffffffffULL;
|
||||
}
|
||||
|
||||
uint64_t getblocks(int fd)
|
||||
{
|
||||
uint64_t ret;
|
||||
struct stat statbuf;
|
||||
if (fstat(fd, &statbuf)) {
|
||||
perror("getblocks: stat error\n");
|
||||
exit(EXIT_FAILURE);
|
||||
}
|
||||
ret = statbuf.st_size / 512;
|
||||
if (S_ISBLK(statbuf.st_mode))
|
||||
if (ioctl(fd, BLKGETSIZE, &ret)) {
|
||||
perror("ioctl error getting blksize");
|
||||
exit(EXIT_FAILURE);
|
||||
}
|
||||
return ret;
|
||||
}
|
||||
|
||||
uint64_t hatoi(const char *s)
|
||||
{
|
||||
char *e;
|
||||
long long i = strtoll(s, &e, 10);
|
||||
switch (*e) {
|
||||
case 't':
|
||||
case 'T':
|
||||
i *= 1024;
|
||||
case 'g':
|
||||
case 'G':
|
||||
i *= 1024;
|
||||
case 'm':
|
||||
case 'M':
|
||||
i *= 1024;
|
||||
case 'k':
|
||||
case 'K':
|
||||
i *= 1024;
|
||||
}
|
||||
return i;
|
||||
}
|
||||
|
||||
unsigned hatoi_validate(const char *s, const char *msg)
|
||||
{
|
||||
uint64_t v = hatoi(s);
|
||||
|
||||
if (v & (v - 1)) {
|
||||
fprintf(stderr, "%s must be a power of two\n", msg);
|
||||
exit(EXIT_FAILURE);
|
||||
}
|
||||
|
||||
v /= 512;
|
||||
|
||||
if (v > USHRT_MAX) {
|
||||
fprintf(stderr, "%s too large\n", msg);
|
||||
exit(EXIT_FAILURE);
|
||||
}
|
||||
|
||||
if (!v) {
|
||||
fprintf(stderr, "%s too small\n", msg);
|
||||
exit(EXIT_FAILURE);
|
||||
}
|
||||
|
||||
return v;
|
||||
}
|
||||
|
||||
static void do_write_sb(int fd, struct cache_sb *sb)
|
||||
{
|
||||
char zeroes[SB_START] = {0};
|
||||
size_t bytes = ((void *) bset_bkey_last(sb)) - (void *) sb;
|
||||
|
||||
/* Zero start of disk */
|
||||
if (pwrite(fd, zeroes, SB_START, 0) != SB_START) {
|
||||
perror("write error trying to zero start of disk\n");
|
||||
exit(EXIT_FAILURE);
|
||||
}
|
||||
/* Write superblock */
|
||||
if (pwrite(fd, sb, bytes, SB_START) != bytes) {
|
||||
perror("write error trying to write superblock\n");
|
||||
exit(EXIT_FAILURE);
|
||||
}
|
||||
|
||||
fsync(fd);
|
||||
close(fd);
|
||||
}
|
||||
|
||||
void write_backingdev_sb(int fd, unsigned block_size, unsigned *bucket_sizes,
|
||||
bool writeback, uint64_t data_offset,
|
||||
const char *label,
|
||||
uuid_le set_uuid)
|
||||
{
|
||||
char uuid_str[40], set_uuid_str[40];
|
||||
struct cache_sb sb;
|
||||
|
||||
memset(&sb, 0, sizeof(struct cache_sb));
|
||||
|
||||
sb.offset = SB_SECTOR;
|
||||
sb.version = BCACHE_SB_VERSION_BDEV;
|
||||
sb.magic = BCACHE_MAGIC;
|
||||
uuid_generate(sb.uuid.b);
|
||||
sb.set_uuid = set_uuid;
|
||||
sb.bucket_size = bucket_sizes[0];
|
||||
sb.block_size = block_size;
|
||||
|
||||
uuid_unparse(sb.uuid.b, uuid_str);
|
||||
uuid_unparse(sb.set_uuid.b, set_uuid_str);
|
||||
if (label)
|
||||
memcpy(sb.label, label, SB_LABEL_SIZE);
|
||||
|
||||
SET_BDEV_CACHE_MODE(&sb, writeback
|
||||
? CACHE_MODE_WRITEBACK
|
||||
: CACHE_MODE_WRITETHROUGH);
|
||||
|
||||
if (data_offset != BDEV_DATA_START_DEFAULT) {
|
||||
sb.version = BCACHE_SB_VERSION_BDEV_WITH_OFFSET;
|
||||
sb.data_offset = data_offset;
|
||||
}
|
||||
|
||||
sb.csum = csum_set(&sb, BCH_CSUM_CRC64);
|
||||
|
||||
printf("UUID: %s\n"
|
||||
"Set UUID: %s\n"
|
||||
"version: %u\n"
|
||||
"block_size: %u\n"
|
||||
"data_offset: %ju\n",
|
||||
uuid_str, set_uuid_str,
|
||||
(unsigned) sb.version,
|
||||
sb.block_size,
|
||||
data_offset);
|
||||
|
||||
do_write_sb(fd, &sb);
|
||||
}
|
||||
|
||||
int dev_open(const char *dev, bool wipe_bcache)
|
||||
{
|
||||
struct cache_sb sb;
|
||||
blkid_probe pr;
|
||||
int fd;
|
||||
char err[MAX_PATH];
|
||||
|
||||
if ((fd = open(dev, O_RDWR|O_EXCL)) == -1) {
|
||||
sprintf(err, "Can't open dev %s: %s\n", dev, strerror(errno));
|
||||
goto err;
|
||||
}
|
||||
|
||||
if (pread(fd, &sb, sizeof(sb), SB_START) != sizeof(sb)) {
|
||||
sprintf(err, "Failed to read superblock");
|
||||
goto err;
|
||||
}
|
||||
|
||||
if (!memcmp(&sb.magic, &BCACHE_MAGIC, 16) && !wipe_bcache) {
|
||||
sprintf(err, "Already a bcache device on %s, "
|
||||
"overwrite with --wipe-bcache\n", dev);
|
||||
goto err;
|
||||
}
|
||||
|
||||
if (!(pr = blkid_new_probe())) {
|
||||
sprintf(err, "Failed to create a new probe");
|
||||
goto err;
|
||||
}
|
||||
if (blkid_probe_set_device(pr, fd, 0, 0)) {
|
||||
sprintf(err, "failed to set probe to device");
|
||||
goto err;
|
||||
}
|
||||
/* enable ptable probing; superblock probing is enabled by default */
|
||||
if (blkid_probe_enable_partitions(pr, true)) {
|
||||
sprintf(err, "Failed to enable partitions on probe");
|
||||
goto err;
|
||||
}
|
||||
if (!blkid_do_probe(pr)) {
|
||||
/* XXX wipefs doesn't know how to remove partition tables */
|
||||
sprintf(err, "Device %s already has a non-bcache superblock, "
|
||||
"remove it using wipefs and wipefs -a\n", dev);
|
||||
goto err;
|
||||
}
|
||||
|
||||
return fd;
|
||||
|
||||
err:
|
||||
fprintf(stderr, "dev_open failed with: %s", err);
|
||||
exit(EXIT_FAILURE);
|
||||
}
|
||||
|
||||
static unsigned min_bucket_size(int num_bucket_sizes, unsigned *bucket_sizes)
|
||||
{
|
||||
int i;
|
||||
unsigned min = bucket_sizes[0];
|
||||
|
||||
for (i = 0; i < num_bucket_sizes; i++)
|
||||
min = bucket_sizes[i] < min ? bucket_sizes[i] : min;
|
||||
|
||||
return min;
|
||||
}
|
||||
|
||||
static unsigned node_size(unsigned bucket_size) {
|
||||
|
||||
if (bucket_size <= 256)
|
||||
return bucket_size;
|
||||
else if (bucket_size <= 512)
|
||||
return bucket_size / 2;
|
||||
else
|
||||
return bucket_size / 4;
|
||||
}
|
||||
|
||||
void write_cache_sbs(int *fds, struct cache_sb *sb,
|
||||
unsigned block_size, unsigned *bucket_sizes,
|
||||
int num_bucket_sizes)
|
||||
{
|
||||
char uuid_str[40], set_uuid_str[40];
|
||||
size_t i;
|
||||
unsigned min_size = min_bucket_size(num_bucket_sizes, bucket_sizes);
|
||||
|
||||
sb->offset = SB_SECTOR;
|
||||
sb->version = BCACHE_SB_VERSION_CDEV_V3;
|
||||
sb->magic = BCACHE_MAGIC;
|
||||
sb->block_size = block_size;
|
||||
sb->keys = bch_journal_buckets_offset(sb);
|
||||
|
||||
/*
|
||||
* don't have a userspace crc32c implementation handy, just always use
|
||||
* crc64
|
||||
*/
|
||||
SET_CACHE_SB_CSUM_TYPE(sb, BCH_CSUM_CRC64);
|
||||
|
||||
for (i = 0; i < sb->nr_in_set; i++) {
|
||||
struct cache_member *m = sb->members + i;
|
||||
|
||||
if (num_bucket_sizes <= 1)
|
||||
sb->bucket_size = bucket_sizes[0];
|
||||
else
|
||||
sb->bucket_size = bucket_sizes[i];
|
||||
SET_CACHE_BTREE_NODE_SIZE(sb, node_size(min_size));
|
||||
|
||||
sb->uuid = m->uuid;
|
||||
sb->nbuckets = getblocks(fds[i]) / sb->bucket_size;
|
||||
sb->nr_this_dev = i;
|
||||
sb->first_bucket = (23 / sb->bucket_size) + 1;
|
||||
|
||||
if (sb->nbuckets < 1 << 7) {
|
||||
fprintf(stderr, "Not enough buckets: %llu, need %u\n",
|
||||
sb->nbuckets, 1 << 7);
|
||||
exit(EXIT_FAILURE);
|
||||
}
|
||||
|
||||
sb->csum = csum_set(sb, CACHE_SB_CSUM_TYPE(sb));
|
||||
|
||||
uuid_unparse(sb->uuid.b, uuid_str);
|
||||
uuid_unparse(sb->set_uuid.b, set_uuid_str);
|
||||
printf("UUID: %s\n"
|
||||
"Set UUID: %s\n"
|
||||
"version: %u\n"
|
||||
"nbuckets: %llu\n"
|
||||
"block_size: %u\n"
|
||||
"bucket_size: %u\n"
|
||||
"nr_in_set: %u\n"
|
||||
"nr_this_dev: %u\n"
|
||||
"first_bucket: %u\n",
|
||||
uuid_str, set_uuid_str,
|
||||
(unsigned) sb->version,
|
||||
sb->nbuckets,
|
||||
sb->block_size,
|
||||
sb->bucket_size,
|
||||
sb->nr_in_set,
|
||||
sb->nr_this_dev,
|
||||
sb->first_bucket);
|
||||
|
||||
do_write_sb(fds[i], sb);
|
||||
}
|
||||
}
|
||||
|
||||
void next_cache_device(struct cache_sb *sb,
|
||||
unsigned replication_set,
|
||||
int tier,
|
||||
unsigned replacement_policy,
|
||||
bool discard)
|
||||
{
|
||||
struct cache_member *m = sb->members + sb->nr_in_set;
|
||||
|
||||
SET_CACHE_REPLICATION_SET(m, replication_set);
|
||||
SET_CACHE_TIER(m, tier);
|
||||
SET_CACHE_REPLACEMENT(m, replacement_policy);
|
||||
SET_CACHE_DISCARD(m, discard);
|
||||
uuid_generate(m->uuid.b);
|
||||
|
||||
sb->nr_in_set++;
|
||||
}
|
||||
|
||||
unsigned get_blocksize(const char *path)
|
||||
{
|
||||
struct stat statbuf;
|
||||
|
||||
if (stat(path, &statbuf)) {
|
||||
fprintf(stderr, "Error statting %s: %s\n",
|
||||
path, strerror(errno));
|
||||
exit(EXIT_FAILURE);
|
||||
}
|
||||
|
||||
if (S_ISBLK(statbuf.st_mode)) {
|
||||
/* check IO limits:
|
||||
* BLKALIGNOFF: alignment_offset
|
||||
* BLKPBSZGET: physical_block_size
|
||||
* BLKSSZGET: logical_block_size
|
||||
* BLKIOMIN: minimum_io_size
|
||||
* BLKIOOPT: optimal_io_size
|
||||
*
|
||||
* It may be tempting to use physical_block_size,
|
||||
* or even minimum_io_size.
|
||||
* But to be as transparent as possible,
|
||||
* we want to use logical_block_size.
|
||||
*/
|
||||
unsigned int logical_block_size;
|
||||
int fd = open(path, O_RDONLY);
|
||||
|
||||
if (fd < 0) {
|
||||
fprintf(stderr, "open(%s) failed: %m\n", path);
|
||||
exit(EXIT_FAILURE);
|
||||
}
|
||||
if (ioctl(fd, BLKSSZGET, &logical_block_size)) {
|
||||
fprintf(stderr, "ioctl(%s, BLKSSZGET) failed: %m\n", path);
|
||||
exit(EXIT_FAILURE);
|
||||
}
|
||||
close(fd);
|
||||
return logical_block_size / 512;
|
||||
|
||||
}
|
||||
/* else: not a block device.
|
||||
* Why would we even want to write a bcache super block there? */
|
||||
|
||||
return statbuf.st_blksize / 512;
|
||||
}
|
||||
|
||||
long strtoul_or_die(const char *p, size_t max, const char *msg)
|
||||
{
|
||||
errno = 0;
|
||||
long v = strtol(p, NULL, 10);
|
||||
if (errno || v < 0 || v >= max) {
|
||||
fprintf(stderr, "Invalid %s %zi\n", msg, v);
|
||||
exit(EXIT_FAILURE);
|
||||
}
|
||||
|
||||
return v;
|
||||
}
|
||||
|
||||
static void print_encode(char *in)
|
||||
{
|
||||
char *pos;
|
||||
for (pos = in; *pos; pos++)
|
||||
if (isalnum(*pos) || strchr(".-_", *pos))
|
||||
putchar(*pos);
|
||||
else
|
||||
printf("%%%x", *pos);
|
||||
}
|
||||
|
||||
static void show_uuid_only(struct cache_sb *sb, char *dev_uuid) {
|
||||
uuid_unparse(sb->uuid.b, dev_uuid);
|
||||
}
|
||||
|
||||
static void show_super_common(struct cache_sb *sb, bool force_csum)
|
||||
{
|
||||
char uuid[40];
|
||||
char label[SB_LABEL_SIZE + 1];
|
||||
uint64_t expected_csum;
|
||||
|
||||
printf("sb.magic\t\t");
|
||||
if (!memcmp(&sb->magic, &BCACHE_MAGIC, sizeof(sb->magic))) {
|
||||
printf("ok\n");
|
||||
} else {
|
||||
printf("bad magic\n");
|
||||
fprintf(stderr, "Invalid superblock (bad magic)\n");
|
||||
exit(2);
|
||||
}
|
||||
|
||||
printf("sb.first_sector\t\t%ju", (uint64_t) sb->offset);
|
||||
if (sb->offset == SB_SECTOR) {
|
||||
printf(" [match]\n");
|
||||
} else {
|
||||
printf(" [expected %ds]\n", SB_SECTOR);
|
||||
fprintf(stderr, "Invalid superblock (bad sector)\n");
|
||||
exit(2);
|
||||
}
|
||||
|
||||
printf("sb.csum\t\t\t%ju", (uint64_t) sb->csum);
|
||||
expected_csum = csum_set(sb,
|
||||
sb->version < BCACHE_SB_VERSION_CDEV_V3
|
||||
? BCH_CSUM_CRC64
|
||||
: CACHE_SB_CSUM_TYPE(sb));
|
||||
if (sb->csum == expected_csum) {
|
||||
printf(" [match]\n");
|
||||
} else {
|
||||
printf(" [expected %" PRIX64 "]\n", expected_csum);
|
||||
if (!force_csum) {
|
||||
fprintf(stderr, "Corrupt superblock (bad csum)\n");
|
||||
exit(2);
|
||||
}
|
||||
}
|
||||
|
||||
printf("sb.version\t\t%ju", (uint64_t) sb->version);
|
||||
switch (sb->version) {
|
||||
// These are handled the same by the kernel
|
||||
case BCACHE_SB_VERSION_CDEV:
|
||||
case BCACHE_SB_VERSION_CDEV_WITH_UUID:
|
||||
printf(" [cache device]\n");
|
||||
break;
|
||||
|
||||
// The second adds data offset support
|
||||
case BCACHE_SB_VERSION_BDEV:
|
||||
case BCACHE_SB_VERSION_BDEV_WITH_OFFSET:
|
||||
printf(" [backing device]\n");
|
||||
break;
|
||||
|
||||
default:
|
||||
printf(" [unknown]\n");
|
||||
// exit code?
|
||||
exit(EXIT_SUCCESS);
|
||||
}
|
||||
|
||||
putchar('\n');
|
||||
|
||||
strncpy(label, (char *) sb->label, SB_LABEL_SIZE);
|
||||
label[SB_LABEL_SIZE] = '\0';
|
||||
printf("dev.label\t\t");
|
||||
if (*label)
|
||||
print_encode(label);
|
||||
else
|
||||
printf("(empty)");
|
||||
putchar('\n');
|
||||
|
||||
uuid_unparse(sb->uuid.b, uuid);
|
||||
printf("dev.uuid\t\t%s\n", uuid);
|
||||
|
||||
uuid_unparse(sb->set_uuid.b, uuid);
|
||||
printf("cset.uuid\t\t%s\n", uuid);
|
||||
}
|
||||
|
||||
void show_super_backingdev(struct cache_sb *sb, bool force_csum)
|
||||
{
|
||||
uint64_t first_sector;
|
||||
|
||||
show_super_common(sb, force_csum);
|
||||
|
||||
if (sb->version == BCACHE_SB_VERSION_BDEV) {
|
||||
first_sector = BDEV_DATA_START_DEFAULT;
|
||||
} else {
|
||||
if (sb->keys == 1 || sb->d[0]) {
|
||||
fprintf(stderr,
|
||||
"Possible experimental format detected, bailing\n");
|
||||
exit(3);
|
||||
}
|
||||
first_sector = sb->data_offset;
|
||||
}
|
||||
|
||||
printf("dev.data.first_sector\t%ju\n"
|
||||
"dev.data.cache_mode\t%s"
|
||||
"dev.data.cache_state\t%s\n",
|
||||
first_sector,
|
||||
bdev_cache_mode[BDEV_CACHE_MODE(sb)],
|
||||
bdev_state[BDEV_STATE(sb)]);
|
||||
}
|
||||
|
||||
static void show_cache_member(struct cache_sb *sb, unsigned i)
|
||||
{
|
||||
struct cache_member *m = ((struct cache_member *) sb->d) + i;
|
||||
|
||||
printf("cache.state\t%s\n", cache_state[CACHE_STATE(m)]);
|
||||
printf("cache.tier\t%llu\n", CACHE_TIER(m));
|
||||
|
||||
printf("cache.replication_set\t%llu\n", CACHE_REPLICATION_SET(m));
|
||||
printf("cache.cur_meta_replicas\t%llu\n", REPLICATION_SET_CUR_META_REPLICAS(m));
|
||||
printf("cache.cur_data_replicas\t%llu\n", REPLICATION_SET_CUR_DATA_REPLICAS(m));
|
||||
|
||||
printf("cache.has_metadata\t%llu\n", CACHE_HAS_METADATA(m));
|
||||
printf("cache.has_data\t%llu\n", CACHE_HAS_DATA(m));
|
||||
|
||||
printf("cache.replacement\t%s\n", replacement_policies[CACHE_REPLACEMENT(m)]);
|
||||
printf("cache.discard\t%llu\n", CACHE_DISCARD(m));
|
||||
}
|
||||
|
||||
void show_super_cache(struct cache_sb *sb, bool force_csum)
|
||||
{
|
||||
show_super_common(sb, force_csum);
|
||||
|
||||
printf("dev.sectors_per_block\t%u\n"
|
||||
"dev.sectors_per_bucket\t%u\n",
|
||||
sb->block_size,
|
||||
sb->bucket_size);
|
||||
|
||||
// total_sectors includes the superblock;
|
||||
printf("dev.cache.first_sector\t%u\n"
|
||||
"dev.cache.cache_sectors\t%llu\n"
|
||||
"dev.cache.total_sectors\t%llu\n"
|
||||
"dev.cache.ordered\t%s\n"
|
||||
"dev.cache.pos\t\t%u\n"
|
||||
"dev.cache.setsize\t\t%u\n",
|
||||
sb->bucket_size * sb->first_bucket,
|
||||
sb->bucket_size * (sb->nbuckets - sb->first_bucket),
|
||||
sb->bucket_size * sb->nbuckets,
|
||||
CACHE_SYNC(sb) ? "yes" : "no",
|
||||
sb->nr_this_dev,
|
||||
sb->nr_in_set);
|
||||
|
||||
show_cache_member(sb, sb->nr_this_dev);
|
||||
}
|
||||
|
||||
struct cache_sb *query_dev(char *dev, bool force_csum,
|
||||
bool print_sb, bool uuid_only, char *dev_uuid)
|
||||
{
|
||||
struct cache_sb sb_stack, *sb = &sb_stack;
|
||||
size_t bytes = sizeof(*sb);
|
||||
|
||||
int fd = open(dev, O_RDONLY);
|
||||
if (fd < 0) {
|
||||
printf("Can't open dev %s: %s\n", dev, strerror(errno));
|
||||
exit(2);
|
||||
}
|
||||
|
||||
if (pread(fd, sb, bytes, SB_START) != bytes) {
|
||||
fprintf(stderr, "Couldn't read\n");
|
||||
exit(2);
|
||||
}
|
||||
|
||||
if (sb->keys) {
|
||||
bytes = sizeof(*sb) + sb->keys * sizeof(uint64_t);
|
||||
sb = malloc(bytes);
|
||||
|
||||
if (pread(fd, sb, bytes, SB_START) != bytes) {
|
||||
fprintf(stderr, "Couldn't read\n");
|
||||
exit(2);
|
||||
}
|
||||
}
|
||||
|
||||
if(uuid_only) {
|
||||
show_uuid_only(sb, dev_uuid);
|
||||
return sb;
|
||||
}
|
||||
|
||||
if(print_sb) {
|
||||
if (!SB_IS_BDEV(sb))
|
||||
show_super_cache(sb, force_csum);
|
||||
else
|
||||
show_super_backingdev(sb, force_csum);
|
||||
}
|
||||
|
||||
return sb;
|
||||
}
|
||||
|
||||
static void dev_name(const char *ugly_path) {
|
||||
char buf[32];
|
||||
int i, end = strlen(ugly_path);
|
||||
|
||||
//Chop off "/bcache", then look for the next '/' from the end
|
||||
for (i = end - 8; ; i--)
|
||||
if(ugly_path[i] == '/')
|
||||
break;
|
||||
|
||||
strcpy(buf, ugly_path + i);
|
||||
buf[end - i - 7] = 0;
|
||||
|
||||
// Is the dev guaranteed to be in /dev?
|
||||
// This is needed for finding the superblock with a query-dev
|
||||
printf("/dev%s\n", buf);
|
||||
}
|
||||
|
||||
static void list_cacheset_devs(char *cset_dir, char *cset_name, bool parse_dev_name) {
|
||||
int i = 0;
|
||||
DIR *cachedir;
|
||||
struct stat cache_stat;
|
||||
char intbuf[4];
|
||||
char entry[MAX_PATH];
|
||||
|
||||
snprintf(entry, MAX_PATH, "%s/%s/cache0", cset_dir, cset_name);
|
||||
snprintf(intbuf, 4, "%d", i);
|
||||
|
||||
while(true) {
|
||||
char buf[MAX_PATH];
|
||||
int len;
|
||||
|
||||
if((cachedir = opendir(entry)) == NULL)
|
||||
break;
|
||||
|
||||
if(stat(entry, &cache_stat))
|
||||
break;
|
||||
|
||||
if((len = readlink(entry, buf, sizeof(buf) - 1)) != -1) {
|
||||
buf[len] = '\0';
|
||||
if(parse_dev_name)
|
||||
dev_name(buf);
|
||||
else
|
||||
printf("\t%s\n", buf);
|
||||
}
|
||||
|
||||
/* remove i from end and append i++ */
|
||||
entry[strlen(entry)-strlen(intbuf)] = 0;
|
||||
i++;
|
||||
snprintf(intbuf, 4, "%d", i);
|
||||
strcat(entry, intbuf);
|
||||
}
|
||||
}
|
||||
|
||||
char *find_matching_uuid(char *stats_dir, char *subdir, const char *stats_dev_uuid) {
|
||||
/* Do a query-dev --uuid only to get the uuid
|
||||
* repeat on each dev until we find a matching one
|
||||
* append that cache# to subdir and return
|
||||
*/
|
||||
|
||||
int i = 0;
|
||||
DIR *cachedir;
|
||||
struct stat cache_stat;
|
||||
char intbuf[4];
|
||||
char entry[MAX_PATH];
|
||||
char *err = NULL;
|
||||
|
||||
snprintf(entry, MAX_PATH, "%s%s", stats_dir, subdir);
|
||||
snprintf(intbuf, 4, "%d", i);
|
||||
strcat(entry, intbuf);
|
||||
|
||||
while(true) {
|
||||
char buf[MAX_PATH];
|
||||
int len;
|
||||
|
||||
if((cachedir = opendir(entry)) == NULL)
|
||||
break;
|
||||
|
||||
if(stat(entry, &cache_stat))
|
||||
break;
|
||||
|
||||
if((len = readlink(entry, buf, sizeof(buf) - 1)) != -1) {
|
||||
char dev_uuid[40];
|
||||
buf[len] = '\0';
|
||||
int i, end = strlen(buf);
|
||||
char tmp[32], devname[32];
|
||||
|
||||
/* Chop off "/bcache", then look for the
|
||||
* next '/' from the end
|
||||
*/
|
||||
for (i = end - 8; ; i--)
|
||||
if(buf[i] == '/')
|
||||
break;
|
||||
|
||||
strcpy(tmp, buf + i);
|
||||
tmp[end - i - 7] = 0;
|
||||
strcpy(devname, "/dev");
|
||||
strcat(devname, tmp);
|
||||
|
||||
query_dev(devname, false, false, true, dev_uuid);
|
||||
if(!strcmp(stats_dev_uuid, dev_uuid)) {
|
||||
strcat(subdir, intbuf);
|
||||
return err;
|
||||
}
|
||||
}
|
||||
|
||||
/* remove i from end and append i++ */
|
||||
entry[strlen(entry)-strlen(intbuf)] = 0;
|
||||
i++;
|
||||
snprintf(intbuf, 4, "%d", i);
|
||||
strcat(entry, intbuf);
|
||||
}
|
||||
|
||||
|
||||
err = "dev uuid doesn't exist in cache_set";
|
||||
return err;
|
||||
}
|
||||
|
||||
char *list_cachesets(char *cset_dir, bool list_devs)
|
||||
{
|
||||
struct dirent *ent;
|
||||
DIR *dir;
|
||||
char *err = NULL;
|
||||
|
||||
dir = opendir(cset_dir);
|
||||
if (!dir) {
|
||||
err = "Failed to open cacheset dir";
|
||||
goto err;
|
||||
}
|
||||
|
||||
while ((ent = readdir(dir)) != NULL) {
|
||||
struct stat statbuf;
|
||||
char entry[MAX_PATH];
|
||||
struct dirent *cache_ent;
|
||||
|
||||
if (!strcmp(ent->d_name, ".") || !strcmp(ent->d_name, ".."))
|
||||
continue;
|
||||
|
||||
snprintf(entry, MAX_PATH, "%s/%s", cset_dir, ent->d_name);
|
||||
if(stat(entry, &statbuf) == -1) {
|
||||
err = "Failed to stat cacheset subdir";
|
||||
goto err;
|
||||
}
|
||||
|
||||
if (S_ISDIR(statbuf.st_mode)) {
|
||||
printf("%s\n", ent->d_name);
|
||||
|
||||
if(list_devs) {
|
||||
list_cacheset_devs(cset_dir, ent->d_name, true);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
err:
|
||||
closedir(dir);
|
||||
return err;
|
||||
}
|
||||
|
||||
char *register_bcache(char *const *devs)
|
||||
{
|
||||
int ret, bcachefd;
|
||||
char *err = NULL;
|
||||
|
||||
bcachefd = open("/dev/bcache", O_RDWR);
|
||||
if (bcachefd < 0) {
|
||||
err = "Can't open bcache device";
|
||||
goto err;
|
||||
}
|
||||
|
||||
ret = ioctl(bcachefd, BCH_IOCTL_REGISTER, devs);
|
||||
if (ret < 0) {
|
||||
char tmp[64];
|
||||
snprintf(tmp, 64, "ioctl register error: %s\n",
|
||||
strerror(ret));
|
||||
err = strdup(tmp);
|
||||
goto err;
|
||||
}
|
||||
|
||||
err:
|
||||
if (bcachefd)
|
||||
close(bcachefd);
|
||||
return err;
|
||||
}
|
||||
|
||||
char *unregister_bcache(char *const *devs)
|
||||
{
|
||||
int ret, bcachefd;
|
||||
char *err = NULL;
|
||||
|
||||
bcachefd = open("/dev/bcache", O_RDWR);
|
||||
if (bcachefd < 0) {
|
||||
err = "Can't open bcache device";
|
||||
goto err;
|
||||
}
|
||||
|
||||
ret = ioctl(bcachefd, BCH_IOCTL_UNREGISTER, devs);
|
||||
if (ret < 0) {
|
||||
char tmp[64];
|
||||
snprintf(tmp, 64, "ioctl unregister error: %s\n",
|
||||
strerror(ret));
|
||||
err = strdup(tmp);
|
||||
goto err;
|
||||
}
|
||||
|
||||
err:
|
||||
close(bcachefd);
|
||||
return err;
|
||||
}
|
||||
|
||||
char *probe(char *dev, int udev)
|
||||
{
|
||||
struct cache_sb sb;
|
||||
char uuid[40];
|
||||
blkid_probe pr;
|
||||
char *err = NULL;
|
||||
|
||||
int fd = open(dev, O_RDONLY);
|
||||
if (fd == -1) {
|
||||
err = "Got file descriptor -1 trying to open dev";
|
||||
goto err;
|
||||
}
|
||||
|
||||
if (!(pr = blkid_new_probe())) {
|
||||
err = "Failed trying to get a blkid for new probe";
|
||||
goto err;
|
||||
}
|
||||
|
||||
if (blkid_probe_set_device(pr, fd, 0, 0)) {
|
||||
err = "Failed blkid probe set device";
|
||||
goto err;
|
||||
}
|
||||
|
||||
/* probe partitions too */
|
||||
if (blkid_probe_enable_partitions(pr, true)) {
|
||||
err = "Enable probe partitions";
|
||||
goto err;
|
||||
}
|
||||
|
||||
/* bail if anything was found
|
||||
* probe-bcache isn't needed once blkid recognizes bcache */
|
||||
if (!blkid_do_probe(pr)) {
|
||||
err = "blkid recognizes bcache";
|
||||
goto err;
|
||||
}
|
||||
|
||||
if (pread(fd, &sb, sizeof(sb), SB_START) != sizeof(sb)) {
|
||||
err = "Failed to read superblock";
|
||||
goto err;
|
||||
}
|
||||
|
||||
if (memcmp(&sb.magic, &BCACHE_MAGIC, sizeof(sb.magic))) {
|
||||
err = "Bcache magic incorrect";
|
||||
goto err;
|
||||
}
|
||||
|
||||
uuid_unparse(sb.uuid.b, uuid);
|
||||
|
||||
if (udev)
|
||||
printf("ID_FS_UUID=%s\n"
|
||||
"ID_FS_UUID_ENC=%s\n"
|
||||
"ID_FS_TYPE=bcache\n",
|
||||
uuid, uuid);
|
||||
else
|
||||
printf("%s: UUID=\"\" TYPE=\"bcache\"\n", uuid);
|
||||
|
||||
return 0;
|
||||
|
||||
err:
|
||||
return err;
|
||||
}
|
||||
|
||||
void sb_state(struct cache_sb *sb, char *dev)
|
||||
{
|
||||
struct cache_member *m = ((struct cache_member *) sb->d) +
|
||||
sb->nr_this_dev;
|
||||
|
||||
printf("device %s\n", dev);
|
||||
printf("\tcache state\t%s\n", cache_state[CACHE_STATE(m)]);
|
||||
printf("\tcache_tier\t%llu\n", CACHE_TIER(m));
|
||||
printf("\tseq#: \t%llu\n", sb->seq);
|
||||
|
||||
}
|
||||
|
||||
char *read_stat_dir(DIR *dir, char *stats_dir, char *stat_name, bool print_val)
|
||||
{
|
||||
struct stat statbuf;
|
||||
char entry[MAX_PATH];
|
||||
char *err = NULL;
|
||||
|
||||
snprintf(entry, MAX_PATH, "%s/%s", stats_dir, stat_name);
|
||||
if(stat(entry, &statbuf) == -1) {
|
||||
char tmp[MAX_PATH];
|
||||
snprintf(tmp, MAX_PATH, "Failed to stat %s\n", entry);
|
||||
err = strdup(tmp);
|
||||
goto err;
|
||||
}
|
||||
|
||||
if (S_ISREG(statbuf.st_mode)) {
|
||||
char buf[MAX_PATH];
|
||||
FILE *fp = NULL;
|
||||
|
||||
fp = fopen(entry, "r");
|
||||
if(!fp) {
|
||||
/* If we can't open the file, this is probably because
|
||||
* of permissions, just move to the next file */
|
||||
return NULL;
|
||||
}
|
||||
|
||||
while(fgets(buf, MAX_PATH, fp));
|
||||
|
||||
if(print_val)
|
||||
printf("%s\n", buf);
|
||||
else
|
||||
printf("%s\n", stat_name);
|
||||
fclose(fp);
|
||||
}
|
||||
err:
|
||||
return err;
|
||||
}
|
||||
|
36
bcache.h
36
bcache.h
@ -8,6 +8,7 @@
|
||||
#define _BCACHE_H
|
||||
|
||||
#include <linux/bcache.h>
|
||||
#include <dirent.h>
|
||||
|
||||
typedef __u8 u8;
|
||||
typedef __u16 u16;
|
||||
@ -20,6 +21,15 @@ typedef __s32 s32;
|
||||
typedef __s64 s64;
|
||||
|
||||
#define SB_START (SB_SECTOR * 512)
|
||||
#define MAX_PATH 256
|
||||
|
||||
|
||||
#define max(x, y) ({ \
|
||||
typeof(x) _max1 = (x); \
|
||||
typeof(y) _max2 = (y); \
|
||||
(void) (&_max1 == &_max2); \
|
||||
_max1 > _max2 ? _max1 : _max2; })
|
||||
|
||||
|
||||
extern const char * const cache_state[];
|
||||
extern const char * const replacement_policies[];
|
||||
@ -34,6 +44,32 @@ void print_string_list(const char * const[], size_t);
|
||||
|
||||
uint64_t bch_checksum(unsigned, const void *, size_t);
|
||||
|
||||
uint64_t getblocks(int);
|
||||
uint64_t hatoi(const char *);
|
||||
unsigned hatoi_validate(const char *, const char *);
|
||||
void write_backingdev_sb(int, unsigned, unsigned *, bool, uint64_t,
|
||||
const char *, uuid_le);
|
||||
int dev_open(const char *, bool);
|
||||
void write_cache_sbs(int *, struct cache_sb *, unsigned, unsigned *, int);
|
||||
void next_cache_device(struct cache_sb *, unsigned, int, unsigned, bool);
|
||||
unsigned get_blocksize(const char *);
|
||||
long strtoul_or_die(const char *, size_t, const char *);
|
||||
|
||||
void show_super_backingdev(struct cache_sb *, bool);
|
||||
void show_super_cache(struct cache_sb *, bool);
|
||||
|
||||
struct cache_sb *query_dev(char *, bool, bool, bool, char *dev_uuid);
|
||||
char *list_cachesets(char *, bool);
|
||||
char *parse_array_to_list(char *const *);
|
||||
char *register_bcache(char *const *);
|
||||
char *unregister_bcache(char *const *);
|
||||
char *probe(char *, int);
|
||||
void sb_state(struct cache_sb *, char *);
|
||||
char *read_stat_dir(DIR *, char *, char *, bool);
|
||||
char *find_matching_uuid(char *, char *, const char*);
|
||||
//int add_device(char *);
|
||||
//int remove_device(char *);
|
||||
|
||||
#define csum_set(i, type) \
|
||||
({ \
|
||||
void *start = ((void *) (i)) + sizeof(uint64_t); \
|
||||
|
151
bcacheadm.8
Normal file
151
bcacheadm.8
Normal file
@ -0,0 +1,151 @@
|
||||
.TH bcacheadm 8
|
||||
.SH NAME
|
||||
bcacheadm \- manage bcache devices
|
||||
|
||||
.SH SYNOPSIS
|
||||
.B bcacheadm
|
||||
[\fIoptions\fR]
|
||||
.B COMMAND
|
||||
[\fIoptions\fR]
|
||||
|
||||
.SH COMMANDS
|
||||
.TP
|
||||
.BR format
|
||||
.RS
|
||||
Format one or a list of devices with bcache data structures. You need to do this before you create a volume.
|
||||
.RE
|
||||
|
||||
.BR register
|
||||
.RS
|
||||
Register a list of devices.
|
||||
.RE
|
||||
|
||||
.BR list-cachesets
|
||||
.RS
|
||||
List cachesets on this system. This just searches /sys/fs/bcache.
|
||||
.RE
|
||||
|
||||
.BR query-devs
|
||||
.RS
|
||||
Gives info about the superblock for a list of devices.
|
||||
.RE
|
||||
|
||||
.BR status
|
||||
.RS
|
||||
Finds the status of the most up to date superblock in each tier. Pass in a list of devices.
|
||||
.RE
|
||||
|
||||
.BR stats
|
||||
.RS
|
||||
List bcache specific statistics. Use --list to find out exactly what these are. To list stats for a cacheset, just give the cacheset uuid. To target a cache within the cacheset, use the -c option. To get time interval stats, use the hour, day, etc, options.
|
||||
.RE
|
||||
|
||||
.BR probe
|
||||
.RS
|
||||
Return UUID if device identified as bcache-formatted.
|
||||
.PP
|
||||
Only necessary until support for the bcache superblock is included
|
||||
in blkid; in the meantime, provides just enough functionality for a udev script
|
||||
to create the /dev/disk/by-uuid symlink.
|
||||
.RE
|
||||
|
||||
.BR help
|
||||
.RS
|
||||
List the bcacheadm commands
|
||||
.RE
|
||||
|
||||
.SH OPTIONS
|
||||
.SH Options for bcacheadm
|
||||
.TP
|
||||
.BR \--help
|
||||
|
||||
|
||||
.SH Options for format
|
||||
.TP
|
||||
.BR \-C
|
||||
Create a cache
|
||||
.TP
|
||||
.BR \-B
|
||||
Create a backing device
|
||||
.TP
|
||||
.BR \-b\ --bucket-size=
|
||||
Specifies the bucket size.
|
||||
.TP
|
||||
.BR \-l\ --label=
|
||||
label
|
||||
.TP
|
||||
.BR \-w,\ --block=
|
||||
block size (hard sector size of SSD, often 2k
|
||||
.TP
|
||||
.BR \-t,\ --tier=
|
||||
tier of subsequent devices
|
||||
.TP
|
||||
.BR \--cache-replacement-policy=
|
||||
one of lru, fifo, or random
|
||||
.TP
|
||||
.BR \-o,\ --data_offset=
|
||||
data offset in sectors
|
||||
.TP
|
||||
.BR \--cset-uuid=
|
||||
Create a cache device with the specified UUID
|
||||
.TP
|
||||
.BR \--csum_type=
|
||||
One of none, csc32c, or csc64
|
||||
.TP
|
||||
.BR \--meta-replicas=
|
||||
Number of metadata replicas
|
||||
.TP
|
||||
.BR \--data-replicas=
|
||||
Number of data replicas
|
||||
.TP
|
||||
.BR \--wipe-bcache
|
||||
Destroy existing bcache data if present
|
||||
.TP
|
||||
.BR \--discard
|
||||
Enable discards
|
||||
.TP
|
||||
.BR \--writeback
|
||||
Enable writeback
|
||||
|
||||
.SH Options for register
|
||||
|
||||
.SH Options for list-cachesets
|
||||
.TP
|
||||
.BR \-d,\ --dir=
|
||||
Provide a directory other than /sys/fs/bcache
|
||||
|
||||
.SH Options for query-devs
|
||||
.TP
|
||||
.BR \-f,\ --force-csum
|
||||
Enables bcacheadm to going even if the superblock crc is invalid
|
||||
|
||||
.SH Options for status
|
||||
|
||||
.SH Options for stats
|
||||
.TP
|
||||
.BR \-a,\ --all
|
||||
List all stats and their values for the given device.
|
||||
.TP
|
||||
.BR \-l,\ --list
|
||||
List the names of the different stats for the given device.
|
||||
.TP
|
||||
.BR \-u,\ --set=
|
||||
UUID for the cacheset
|
||||
.TP
|
||||
.BR \-d,\ --dev=
|
||||
UUID for a device within the cacheset. Must pass in the cacheset UUID in order to search for a dev.
|
||||
.TP
|
||||
.BR \-c,\ --cache=
|
||||
Cache number, starts from 0
|
||||
.TP
|
||||
.BR \--five-min-stats
|
||||
stats accumulated in the last 5 minutes
|
||||
.TP
|
||||
.BR \--hour-stats
|
||||
stats accumulated in the last hour
|
||||
.TP
|
||||
.BR \--day-stats
|
||||
stats accumulated in the last day
|
||||
.TP
|
||||
.BR \--total-stats
|
||||
stats accumulated in total
|
565
bcacheadm.c
Normal file
565
bcacheadm.c
Normal file
@ -0,0 +1,565 @@
|
||||
/*
|
||||
* Authors: Kent Overstreet <kmo@daterainc.com>
|
||||
* Gabriel de Perthuis <g2p.code@gmail.com>
|
||||
* Jacob Malevich <jam@datera.io>
|
||||
*
|
||||
* GPLv2
|
||||
*/
|
||||
|
||||
#include <nih/option.h>
|
||||
#include <nih/command.h>
|
||||
#include <nih/main.h>
|
||||
#include <nih/logging.h>
|
||||
#include <stdlib.h>
|
||||
#include <stdio.h>
|
||||
#include <ctype.h>
|
||||
#include <errno.h>
|
||||
#include <inttypes.h>
|
||||
#include <limits.h>
|
||||
#include <fcntl.h>
|
||||
#include <unistd.h>
|
||||
#include <stdbool.h>
|
||||
#include <stdint.h>
|
||||
#include <blkid.h>
|
||||
#include <string.h>
|
||||
#include <linux/fs.h>
|
||||
#include <sys/ioctl.h>
|
||||
#include <sys/types.h>
|
||||
#include <sys/stat.h>
|
||||
#include <uuid/uuid.h>
|
||||
#include <dirent.h>
|
||||
#include <bcache.h> //libbcache
|
||||
|
||||
#define PACKAGE_NAME "bcacheadm"
|
||||
#define PACKAGE_VERSION "1.0"
|
||||
#define PACKAGE_BUGREPORT "bugreport"
|
||||
|
||||
#define MAX_DEVS MAX_CACHES_PER_SET
|
||||
|
||||
|
||||
/* bcacheadm globals */
|
||||
enum exit {
|
||||
EXIT_OK = 0, /* Ok */
|
||||
EXIT_ERROR = 1, /* General/OS error */
|
||||
EXIT_SHELL = 2, /* Start maintenance shell */
|
||||
EXIT_SHELL_REBOOT = 3, /* Start maintenance shell, reboot when done */
|
||||
EXIT_REBOOT = 4, /* System must reboot */
|
||||
};
|
||||
|
||||
|
||||
/* make-bcache globals */
|
||||
int bdev = -1;
|
||||
int devs = 0;
|
||||
char *cache_devices[MAX_DEVS];
|
||||
int tier_mapping[MAX_DEVS];
|
||||
char *backing_devices[MAX_DEVS];
|
||||
char *backing_dev_labels[MAX_DEVS];
|
||||
size_t i, nr_backing_devices = 0, nr_cache_devices = 0;
|
||||
unsigned block_size = 0;
|
||||
unsigned bucket_sizes[MAX_DEVS];
|
||||
int num_bucket_sizes = 0;
|
||||
int writeback = 0, discard = 0, wipe_bcache = 0;
|
||||
unsigned replication_set = 0, replacement_policy = 0;
|
||||
uint64_t data_offset = BDEV_DATA_START_DEFAULT;
|
||||
char *label = NULL;
|
||||
struct cache_sb *cache_set_sb = NULL;
|
||||
enum long_opts {
|
||||
CACHE_SET_UUID = 256,
|
||||
CSUM_TYPE,
|
||||
REPLICATION_SET,
|
||||
META_REPLICAS,
|
||||
DATA_REPLICAS,
|
||||
};
|
||||
const char *cache_set_uuid = 0;
|
||||
const char *csum_type = 0;
|
||||
char *metadata_replicas = 0;
|
||||
char *data_replicas = 0;
|
||||
char *tier = 0;
|
||||
|
||||
|
||||
/* query-dev globals */
|
||||
bool force_csum = false;
|
||||
bool uuid_only = false;
|
||||
|
||||
/* probe globals */
|
||||
bool udev = false;
|
||||
|
||||
/* list globals */
|
||||
char *cset_dir = "/sys/fs/bcache";
|
||||
bool list_devs = false;
|
||||
|
||||
/* status globals */
|
||||
bool status_all = false;
|
||||
|
||||
/* stats globals */
|
||||
bool stats_all = false;
|
||||
bool stats_list = false;
|
||||
static const char *stats_uuid = NULL;
|
||||
static const char *stats_dev_uuid = NULL;
|
||||
static const char *stats_cache_num = NULL;
|
||||
bool stats_five_min = false;
|
||||
bool stats_hour = false;
|
||||
bool stats_day = false;
|
||||
bool stats_total = false;
|
||||
|
||||
/* make-bcache option setters */
|
||||
static int set_block_size(NihOption *option, const char *arg)
|
||||
{
|
||||
block_size = hatoi_validate(arg, "block size");
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int set_cache(NihOption *option, const char *arg)
|
||||
{
|
||||
bdev = 0;
|
||||
cache_devices[nr_cache_devices] = strdup(arg);
|
||||
if(!tier)
|
||||
tier_mapping[nr_cache_devices] = 0;
|
||||
else {
|
||||
int ntier = atoi(tier);
|
||||
if(ntier == 0 || ntier == 1)
|
||||
tier_mapping[nr_cache_devices] = ntier;
|
||||
else
|
||||
printf("Invalid tier\n");
|
||||
}
|
||||
|
||||
devs++;
|
||||
nr_cache_devices++;
|
||||
}
|
||||
|
||||
static int set_bdev(NihOption *option, const char *arg)
|
||||
{
|
||||
bdev = 1;
|
||||
|
||||
if(label)
|
||||
backing_dev_labels[nr_backing_devices] = strdup(label);
|
||||
|
||||
backing_devices[nr_backing_devices] = strdup(arg);
|
||||
|
||||
nr_backing_devices++;
|
||||
devs++;
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int set_bucket_sizes(NihOption *option, const char *arg)
|
||||
{
|
||||
bucket_sizes[num_bucket_sizes]=hatoi_validate(arg, "bucket size");
|
||||
num_bucket_sizes++;
|
||||
return 0;
|
||||
}
|
||||
|
||||
/* probe setters */
|
||||
static int set_udev(NihOption *option, const char *arg)
|
||||
{
|
||||
if (strcmp("udev", arg)) {
|
||||
printf("Invalid output format %s\n", arg);
|
||||
exit(EXIT_FAILURE);
|
||||
}
|
||||
udev = true;
|
||||
return 0;
|
||||
}
|
||||
|
||||
|
||||
/* options */
|
||||
static NihOption make_bcache_options[] = {
|
||||
// {int shortoption, char* longoption, char* help, NihOptionGroup, char* argname, void *value, NihOptionSetter}
|
||||
{'C', "cache", N_("Format a cache device"), NULL, "dev", NULL, set_cache},
|
||||
{'B', "bdev", N_("Format a backing device"), NULL, "dev", NULL, set_bdev},
|
||||
{'l', "label", N_("label"), NULL, "label", &label, NULL},
|
||||
//Only one bucket_size supported until a list of bucket sizes is parsed correctly
|
||||
{'b', "bucket", N_("bucket size"), NULL, "size", NULL, set_bucket_sizes},
|
||||
//Does the default setter automatically convert strings to an int?
|
||||
{'w', "block", N_("block size (hard sector size of SSD, often 2k"), NULL,"size", NULL, set_block_size},
|
||||
{'t', "tier", N_("tier of subsequent devices"), NULL,"#", &tier, NULL},
|
||||
{'p', "cache_replacement_policy", N_("one of (lru|fifo|random)"), NULL,"policy", &replacement_policy, NULL},
|
||||
{'o', "data_offset", N_("data offset in sectors"), NULL,"offset", &data_offset, NULL},
|
||||
|
||||
{0, "cset-uuid", N_("UUID for the cache set"), NULL, "uuid", &cache_set_uuid, NULL},
|
||||
{0, "csum-type", N_("One of (none|crc32c|crc64)"), NULL, "type", &csum_type, NULL },
|
||||
{0, "replication-set",N_("replication set of subsequent devices"), NULL, NULL, &replication_set, NULL },
|
||||
{0, "meta-replicas",N_("number of metadata replicas"), NULL, "#", &metadata_replicas, NULL},
|
||||
{0, "data-replicas",N_("number of data replicas"), NULL, "#", &data_replicas, NULL },
|
||||
|
||||
{0, "wipe-bcache", N_("destroy existing bcache data if present"), NULL, NULL, &wipe_bcache, NULL},
|
||||
{0, "discard", N_("enable discards"), NULL, NULL, &discard, NULL},
|
||||
{0, "writeback", N_("enable writeback"), NULL, NULL, &writeback, NULL},
|
||||
|
||||
NIH_OPTION_LAST
|
||||
};
|
||||
|
||||
static NihOption probe_bcache_options[] = {
|
||||
{'o', "udev", N_("udev"), NULL, NULL, NULL, set_udev},
|
||||
NIH_OPTION_LAST
|
||||
};
|
||||
|
||||
static NihOption bcache_register_options[] = {
|
||||
NIH_OPTION_LAST
|
||||
};
|
||||
|
||||
static NihOption bcache_unregister_options[] = {
|
||||
NIH_OPTION_LAST
|
||||
};
|
||||
|
||||
static NihOption query_devs_options[] = {
|
||||
{'f', "force_csum", N_("force_csum"), NULL, NULL, &force_csum, NULL},
|
||||
{'u', "uuid-only", N_("only print out the uuid for the devices, not the whole superblock"), NULL, NULL, &uuid_only, NULL},
|
||||
NIH_OPTION_LAST
|
||||
};
|
||||
|
||||
static NihOption list_cachesets_options[] = {
|
||||
{'d', "dir", N_("directory"), NULL, NULL, &cset_dir, NULL},
|
||||
{0, "list-devs", N_("list all devices in the cache sets as well"), NULL, NULL, &list_devs, NULL},
|
||||
NIH_OPTION_LAST
|
||||
};
|
||||
|
||||
static NihOption status_options[] = {
|
||||
{'a', "all", N_("all"), NULL, NULL, &status_all, NULL},
|
||||
NIH_OPTION_LAST
|
||||
};
|
||||
|
||||
static NihOption stats_options[] = {
|
||||
{'a', "all", N_("all"), NULL, NULL, &stats_all, NULL},
|
||||
{'l', "list", N_("list"), NULL, NULL, &stats_list, NULL},
|
||||
{'u', "set", N_("cache_set UUID"), NULL, "UUID", &stats_uuid, NULL},
|
||||
{'d', "dev", N_("dev UUID"), NULL, "UUID", &stats_dev_uuid, NULL},
|
||||
{'c', "cache", N_("cache number (starts from 0)"), NULL, "CACHE#", &stats_cache_num, NULL},
|
||||
{0, "five-min-stats", N_("stats accumulated in last 5 minutes"), NULL, NULL, &stats_five_min, NULL},
|
||||
{0, "hour-stats", N_("stats accumulated in last hour"), NULL, NULL, &stats_hour, NULL},
|
||||
{0, "day-stats", N_("stats accumulated in last day"), NULL, NULL, &stats_day, NULL},
|
||||
{0, "total-stats", N_("stats accumulated in total"), NULL, NULL, &stats_total, NULL},
|
||||
NIH_OPTION_LAST
|
||||
};
|
||||
|
||||
static NihOption options[] = {
|
||||
NIH_OPTION_LAST
|
||||
};
|
||||
|
||||
|
||||
/* commands */
|
||||
int make_bcache(NihCommand *command, char *const *args)
|
||||
{
|
||||
int cache_dev_fd[devs];
|
||||
|
||||
int backing_dev_fd[devs];
|
||||
|
||||
cache_set_sb = calloc(1, sizeof(*cache_set_sb) +
|
||||
sizeof(struct cache_member) * devs);
|
||||
|
||||
if (cache_set_uuid) {
|
||||
if(uuid_parse(cache_set_uuid, cache_set_sb->set_uuid.b)) {
|
||||
fprintf(stderr, "Bad uuid\n");
|
||||
return -1;
|
||||
}
|
||||
} else {
|
||||
uuid_generate(cache_set_sb->set_uuid.b);
|
||||
}
|
||||
|
||||
if (csum_type) {
|
||||
SET_CACHE_PREFERRED_CSUM_TYPE(cache_set_sb,
|
||||
read_string_list_or_die(csum_type, csum_types,
|
||||
"csum type"));
|
||||
} else {
|
||||
SET_CACHE_PREFERRED_CSUM_TYPE(cache_set_sb, BCH_CSUM_CRC32C);
|
||||
}
|
||||
|
||||
if (metadata_replicas) {
|
||||
SET_CACHE_SET_META_REPLICAS_WANT(cache_set_sb,
|
||||
strtoul_or_die(metadata_replicas,
|
||||
CACHE_SET_META_REPLICAS_WANT_MAX,
|
||||
"meta replicas"));
|
||||
} else {
|
||||
SET_CACHE_SET_META_REPLICAS_WANT(cache_set_sb, 1);
|
||||
}
|
||||
|
||||
if (data_replicas) {
|
||||
SET_CACHE_SET_DATA_REPLICAS_WANT(cache_set_sb,
|
||||
strtoul_or_die(data_replicas,
|
||||
CACHE_SET_DATA_REPLICAS_WANT_MAX,
|
||||
"data replicas"));
|
||||
} else {
|
||||
SET_CACHE_SET_DATA_REPLICAS_WANT(cache_set_sb, 1);
|
||||
}
|
||||
|
||||
if (bdev == -1) {
|
||||
fprintf(stderr, "Please specify -C or -B\n");
|
||||
exit(EXIT_FAILURE);
|
||||
}
|
||||
|
||||
if(!bucket_sizes[0]) bucket_sizes[0] = 1024;
|
||||
|
||||
for(i = 0; i < nr_cache_devices; i++)
|
||||
next_cache_device(cache_set_sb,
|
||||
replication_set,
|
||||
tier_mapping[i],
|
||||
replacement_policy,
|
||||
discard);
|
||||
|
||||
if (!cache_set_sb->nr_in_set && !nr_backing_devices) {
|
||||
fprintf(stderr, "Please supply a device\n");
|
||||
exit(EXIT_FAILURE);
|
||||
}
|
||||
|
||||
i = 0;
|
||||
do {
|
||||
if (bucket_sizes[i] < block_size) {
|
||||
fprintf(stderr,
|
||||
"Bucket size cannot be smaller than block size\n");
|
||||
exit(EXIT_FAILURE);
|
||||
}
|
||||
i++;
|
||||
} while (i < num_bucket_sizes);
|
||||
|
||||
if (!block_size) {
|
||||
for (i = 0; i < cache_set_sb->nr_in_set; i++)
|
||||
block_size = max(block_size,
|
||||
get_blocksize(cache_devices[i]));
|
||||
|
||||
for (i = 0; i < nr_backing_devices; i++)
|
||||
block_size = max(block_size,
|
||||
get_blocksize(backing_devices[i]));
|
||||
}
|
||||
|
||||
for (i = 0; i < cache_set_sb->nr_in_set; i++)
|
||||
cache_dev_fd[i] = dev_open(cache_devices[i], wipe_bcache);
|
||||
|
||||
for (i = 0; i < nr_backing_devices; i++)
|
||||
backing_dev_fd[i] = dev_open(backing_devices[i], wipe_bcache);
|
||||
|
||||
write_cache_sbs(cache_dev_fd, cache_set_sb, block_size,
|
||||
bucket_sizes, num_bucket_sizes);
|
||||
|
||||
for (i = 0; i < nr_backing_devices; i++)
|
||||
write_backingdev_sb(backing_dev_fd[i],
|
||||
block_size, bucket_sizes,
|
||||
writeback, data_offset,
|
||||
backing_dev_labels[i],
|
||||
cache_set_sb->set_uuid);
|
||||
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
int probe_bcache(NihCommand *command, char *const *args)
|
||||
{
|
||||
int i;
|
||||
char *err = NULL;
|
||||
|
||||
for (i = 0; args[i] != NULL; i++) {
|
||||
err = probe(args[i], udev);
|
||||
if(err) {
|
||||
printf("probe_bcache error: %s\n", err);
|
||||
return -1;
|
||||
}
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
int bcache_register(NihCommand *command, char *const *args)
|
||||
{
|
||||
char *err = NULL;
|
||||
|
||||
err = register_bcache(args);
|
||||
if (err) {
|
||||
printf("bcache_register error: %s\n", err);
|
||||
return -1;
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
int bcache_unregister(NihCommand *command, char *const *args)
|
||||
{
|
||||
char *err = NULL;
|
||||
|
||||
err = unregister_bcache(args);
|
||||
if (err) {
|
||||
printf("bcache_unregister error: %s\n", err);
|
||||
return -1;
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
int bcache_list_cachesets(NihCommand *command, char *const *args)
|
||||
{
|
||||
char *err = NULL;
|
||||
err = list_cachesets(cset_dir, list_devs);
|
||||
if (err) {
|
||||
printf("bcache_list_cachesets error :%s\n", err);
|
||||
return -1;
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
int bcache_query_devs(NihCommand *command, char *const *args)
|
||||
{
|
||||
int i;
|
||||
|
||||
for (i = 0; args[i] != NULL; i++){
|
||||
char dev_uuid[40];
|
||||
query_dev(args[i], force_csum, true, uuid_only, dev_uuid);
|
||||
if(uuid_only)
|
||||
printf("%s\n", dev_uuid);
|
||||
}
|
||||
}
|
||||
|
||||
int bcache_status(NihCommand *command, char *const *args)
|
||||
{
|
||||
int i;
|
||||
struct cache_sb *sb_tier0 = NULL, *sb_tier1 = NULL;
|
||||
char *dev0 = NULL, *dev1 = NULL;
|
||||
|
||||
for (i = 0; args[i] != NULL; i++) {
|
||||
struct cache_sb *sb = query_dev(args[i], false, false, false, NULL);
|
||||
struct cache_member *m = ((struct cache_member *) sb->d) +
|
||||
sb->nr_this_dev;
|
||||
long long unsigned cache_tier = CACHE_TIER(m);
|
||||
|
||||
if (!cache_tier)
|
||||
if (!sb_tier0 || sb->seq > sb_tier0->seq) {
|
||||
sb_tier0 = sb;
|
||||
dev0 = args[i];
|
||||
}
|
||||
else if (cache_tier == 1)
|
||||
if (!sb_tier1 || sb->seq > sb_tier1->seq) {
|
||||
sb_tier1 = sb;
|
||||
dev1 = args[i];
|
||||
}
|
||||
}
|
||||
if (sb_tier0) sb_state(sb_tier0, dev0);
|
||||
if (sb_tier1) sb_state(sb_tier1, dev1);
|
||||
}
|
||||
|
||||
static char *stats_subdir(char* stats_dir)
|
||||
{
|
||||
char tmp[50] = "/";
|
||||
char *err = NULL;
|
||||
if(stats_dev_uuid) {
|
||||
strcat(tmp, "cache");
|
||||
err = find_matching_uuid(stats_dir, tmp, stats_dev_uuid);
|
||||
if(err)
|
||||
goto err;
|
||||
} else if(stats_cache_num) {
|
||||
strcat(tmp, "cache");
|
||||
strcat(tmp, stats_cache_num);
|
||||
} else if (stats_five_min)
|
||||
strcat(tmp, "stats_five_minute");
|
||||
else if (stats_hour)
|
||||
strcat(tmp, "stats_hour");
|
||||
else if (stats_day)
|
||||
strcat(tmp, "stats_day");
|
||||
else if (stats_total)
|
||||
strcat(tmp, "stats_total");
|
||||
else
|
||||
return err;
|
||||
|
||||
strcat(stats_dir, tmp);
|
||||
|
||||
err:
|
||||
return err;
|
||||
}
|
||||
|
||||
int bcache_stats(NihCommand *command, char *const *args)
|
||||
{
|
||||
int i;
|
||||
char stats_dir[MAX_PATH];
|
||||
DIR *dir = NULL;
|
||||
struct dirent *ent = NULL;
|
||||
char *err = NULL;
|
||||
|
||||
if (stats_uuid) {
|
||||
snprintf(stats_dir, MAX_PATH, "%s/%s", cset_dir, stats_uuid);
|
||||
err = stats_subdir(stats_dir);
|
||||
if(err)
|
||||
goto err;
|
||||
|
||||
dir = opendir(stats_dir);
|
||||
if (!dir) {
|
||||
err = "Failed to open dir";
|
||||
goto err;
|
||||
}
|
||||
} else {
|
||||
err = "Must provide a cacheset uuid";
|
||||
goto err;
|
||||
}
|
||||
|
||||
if(stats_list || stats_all) {
|
||||
while ((ent = readdir(dir)) != NULL) {
|
||||
err = read_stat_dir(dir, stats_dir, ent->d_name, stats_all);
|
||||
if (err)
|
||||
goto err;
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
for (i = 0; args[i] != NULL; i++) {
|
||||
err = read_stat_dir(dir, stats_dir, args[i], true);
|
||||
if (err)
|
||||
goto err;
|
||||
}
|
||||
|
||||
closedir(dir);
|
||||
return 0;
|
||||
|
||||
err:
|
||||
closedir(dir);
|
||||
printf("bcache_stats error: %s\n", err);
|
||||
return -1;
|
||||
}
|
||||
|
||||
static NihCommand commands[] = {
|
||||
{"format", N_("format <list of drives>"),
|
||||
"Format one or a list of devices with bcache datastructures."
|
||||
" You need to do this before you create a volume",
|
||||
N_("format drive[s] with bcache"),
|
||||
NULL, make_bcache_options, make_bcache},
|
||||
{"probe", N_("probe <list of devices>"),
|
||||
"Does a blkid_probe on a device",
|
||||
N_("Does a blkid_probe on a device"),
|
||||
NULL, probe_bcache_options, probe_bcache},
|
||||
{"register", N_("register <list of devices>"),
|
||||
"Registers a list of devices",
|
||||
N_("Registers a list of devices"),
|
||||
NULL, bcache_register_options, bcache_register},
|
||||
{"unregister", N_("unregister <list of devices>"),
|
||||
"Unregisters a list of devices",
|
||||
N_("Unregisters a list of devices"),
|
||||
NULL, bcache_unregister_options, bcache_unregister},
|
||||
{"list-cachesets", N_("list-cachesets"),
|
||||
"Lists cachesets in /sys/fs/bcache",
|
||||
N_("Lists cachesets in /sys/fs/bcache"),
|
||||
NULL, list_cachesets_options, bcache_list_cachesets},
|
||||
{"query-devs", N_("query <list of devices>"),
|
||||
"Gives info about the superblock of a list of devices",
|
||||
N_("show superblock on each of the listed drive"),
|
||||
NULL, query_devs_options, bcache_query_devs},
|
||||
{"status", N_("status <list of devices>"),
|
||||
"Finds the status of the most up to date superblock",
|
||||
N_("Finds the status of the most up to date superblock"),
|
||||
NULL, status_options, bcache_status},
|
||||
{"stats", N_("stats <list of devices>"),
|
||||
"List various bcache statistics",
|
||||
N_("List various bcache statistics"),
|
||||
NULL, stats_options, bcache_stats},
|
||||
NIH_COMMAND_LAST
|
||||
};
|
||||
|
||||
|
||||
int main(int argc, char *argv[])
|
||||
{
|
||||
int ret = 0;
|
||||
nih_main_init (argv[0]);
|
||||
|
||||
nih_option_set_synopsis (_("Manage bcache devices"));
|
||||
nih_option_set_help (
|
||||
_("Helps you manage bcache devices"));
|
||||
|
||||
ret = nih_command_parser (NULL, argc, argv, options, commands);
|
||||
if (ret < 0)
|
||||
exit (1);
|
||||
|
||||
nih_signal_reset();
|
||||
}
|
@ -11,7 +11,6 @@ AC_CONFIG_MACRO_DIR([m4])
|
||||
# Checks for programs.
|
||||
AC_PROG_CC
|
||||
|
||||
|
||||
# Checks for libraries.
|
||||
|
||||
# Checks for header files.
|
||||
|
333
make-bcache.c
333
make-bcache.c
@ -5,10 +5,9 @@
|
||||
*/
|
||||
|
||||
#define _FILE_OFFSET_BITS 64
|
||||
#define __USE_FILE_OFFSET64
|
||||
#define __USE_FILE_OFFSET 64
|
||||
#define _XOPEN_SOURCE 600
|
||||
|
||||
#include <blkid.h>
|
||||
#include <ctype.h>
|
||||
#include <errno.h>
|
||||
#include <fcntl.h>
|
||||
@ -28,74 +27,6 @@
|
||||
|
||||
#include "bcache.h"
|
||||
|
||||
#define max(x, y) ({ \
|
||||
typeof(x) _max1 = (x); \
|
||||
typeof(y) _max2 = (y); \
|
||||
(void) (&_max1 == &_max2); \
|
||||
_max1 > _max2 ? _max1 : _max2; })
|
||||
|
||||
uint64_t getblocks(int fd)
|
||||
{
|
||||
uint64_t ret;
|
||||
struct stat statbuf;
|
||||
if (fstat(fd, &statbuf)) {
|
||||
perror("stat error\n");
|
||||
exit(EXIT_FAILURE);
|
||||
}
|
||||
ret = statbuf.st_size / 512;
|
||||
if (S_ISBLK(statbuf.st_mode))
|
||||
if (ioctl(fd, BLKGETSIZE, &ret)) {
|
||||
perror("ioctl error");
|
||||
exit(EXIT_FAILURE);
|
||||
}
|
||||
return ret;
|
||||
}
|
||||
|
||||
uint64_t hatoi(const char *s)
|
||||
{
|
||||
char *e;
|
||||
long long i = strtoll(s, &e, 10);
|
||||
switch (*e) {
|
||||
case 't':
|
||||
case 'T':
|
||||
i *= 1024;
|
||||
case 'g':
|
||||
case 'G':
|
||||
i *= 1024;
|
||||
case 'm':
|
||||
case 'M':
|
||||
i *= 1024;
|
||||
case 'k':
|
||||
case 'K':
|
||||
i *= 1024;
|
||||
}
|
||||
return i;
|
||||
}
|
||||
|
||||
unsigned hatoi_validate(const char *s, const char *msg)
|
||||
{
|
||||
uint64_t v = hatoi(s);
|
||||
|
||||
if (v & (v - 1)) {
|
||||
fprintf(stderr, "%s must be a power of two\n", msg);
|
||||
exit(EXIT_FAILURE);
|
||||
}
|
||||
|
||||
v /= 512;
|
||||
|
||||
if (v > USHRT_MAX) {
|
||||
fprintf(stderr, "%s too large\n", msg);
|
||||
exit(EXIT_FAILURE);
|
||||
}
|
||||
|
||||
if (!v) {
|
||||
fprintf(stderr, "%s too small\n", msg);
|
||||
exit(EXIT_FAILURE);
|
||||
}
|
||||
|
||||
return v;
|
||||
}
|
||||
|
||||
void usage()
|
||||
{
|
||||
fprintf(stderr,
|
||||
@ -123,249 +54,14 @@ void usage()
|
||||
exit(EXIT_FAILURE);
|
||||
}
|
||||
|
||||
static void do_write_sb(int fd, struct cache_sb *sb)
|
||||
{
|
||||
char zeroes[SB_START] = {0};
|
||||
size_t bytes = ((void *) bset_bkey_last(sb)) - (void *) sb;
|
||||
|
||||
/* Zero start of disk */
|
||||
if (pwrite(fd, zeroes, SB_START, 0) != SB_START) {
|
||||
perror("write error\n");
|
||||
exit(EXIT_FAILURE);
|
||||
}
|
||||
/* Write superblock */
|
||||
if (pwrite(fd, sb, bytes, SB_START) != bytes) {
|
||||
perror("write error\n");
|
||||
exit(EXIT_FAILURE);
|
||||
}
|
||||
|
||||
fsync(fd);
|
||||
close(fd);
|
||||
}
|
||||
|
||||
static void write_backingdev_sb(int fd, unsigned block_size, unsigned bucket_size,
|
||||
bool writeback, uint64_t data_offset,
|
||||
const char *label,
|
||||
uuid_le set_uuid)
|
||||
{
|
||||
char uuid_str[40], set_uuid_str[40];
|
||||
struct cache_sb sb;
|
||||
|
||||
memset(&sb, 0, sizeof(struct cache_sb));
|
||||
|
||||
sb.offset = SB_SECTOR;
|
||||
sb.version = BCACHE_SB_VERSION_BDEV;
|
||||
sb.magic = BCACHE_MAGIC;
|
||||
uuid_generate(sb.uuid.b);
|
||||
sb.set_uuid = set_uuid;
|
||||
sb.bucket_size = bucket_size;
|
||||
sb.block_size = block_size;
|
||||
|
||||
uuid_unparse(sb.uuid.b, uuid_str);
|
||||
uuid_unparse(sb.set_uuid.b, set_uuid_str);
|
||||
if (label)
|
||||
memcpy(sb.label, label, SB_LABEL_SIZE);
|
||||
|
||||
SET_BDEV_CACHE_MODE(&sb, writeback
|
||||
? CACHE_MODE_WRITEBACK
|
||||
: CACHE_MODE_WRITETHROUGH);
|
||||
|
||||
if (data_offset != BDEV_DATA_START_DEFAULT) {
|
||||
sb.version = BCACHE_SB_VERSION_BDEV_WITH_OFFSET;
|
||||
sb.data_offset = data_offset;
|
||||
}
|
||||
|
||||
sb.csum = csum_set(&sb, BCH_CSUM_CRC64);
|
||||
|
||||
printf("UUID: %s\n"
|
||||
"Set UUID: %s\n"
|
||||
"version: %u\n"
|
||||
"block_size: %u\n"
|
||||
"data_offset: %ju\n",
|
||||
uuid_str, set_uuid_str,
|
||||
(unsigned) sb.version,
|
||||
sb.block_size,
|
||||
data_offset);
|
||||
|
||||
do_write_sb(fd, &sb);
|
||||
}
|
||||
|
||||
static int dev_open(const char *dev, bool wipe_bcache)
|
||||
{
|
||||
struct cache_sb sb;
|
||||
blkid_probe pr;
|
||||
int fd;
|
||||
|
||||
if ((fd = open(dev, O_RDWR|O_EXCL)) == -1) {
|
||||
fprintf(stderr, "Can't open dev %s: %s\n", dev, strerror(errno));
|
||||
exit(EXIT_FAILURE);
|
||||
}
|
||||
|
||||
if (pread(fd, &sb, sizeof(sb), SB_START) != sizeof(sb))
|
||||
exit(EXIT_FAILURE);
|
||||
|
||||
if (!memcmp(&sb.magic, &BCACHE_MAGIC, 16) && !wipe_bcache) {
|
||||
fprintf(stderr, "Already a bcache device on %s, "
|
||||
"overwrite with --wipe-bcache\n", dev);
|
||||
exit(EXIT_FAILURE);
|
||||
}
|
||||
|
||||
if (!(pr = blkid_new_probe()))
|
||||
exit(EXIT_FAILURE);
|
||||
if (blkid_probe_set_device(pr, fd, 0, 0))
|
||||
exit(EXIT_FAILURE);
|
||||
/* enable ptable probing; superblock probing is enabled by default */
|
||||
if (blkid_probe_enable_partitions(pr, true))
|
||||
exit(EXIT_FAILURE);
|
||||
if (!blkid_do_probe(pr)) {
|
||||
/* XXX wipefs doesn't know how to remove partition tables */
|
||||
fprintf(stderr, "Device %s already has a non-bcache superblock, "
|
||||
"remove it using wipefs and wipefs -a\n", dev);
|
||||
exit(EXIT_FAILURE);
|
||||
}
|
||||
|
||||
return fd;
|
||||
}
|
||||
|
||||
static void write_cache_sbs(int *fds, struct cache_sb *sb,
|
||||
unsigned block_size, unsigned bucket_size)
|
||||
{
|
||||
char uuid_str[40], set_uuid_str[40];
|
||||
size_t i;
|
||||
|
||||
sb->offset = SB_SECTOR;
|
||||
sb->version = BCACHE_SB_VERSION_CDEV_V3;
|
||||
sb->magic = BCACHE_MAGIC;
|
||||
sb->bucket_size = bucket_size;
|
||||
sb->block_size = block_size;
|
||||
sb->keys = bch_journal_buckets_offset(sb);
|
||||
|
||||
/*
|
||||
* don't have a userspace crc32c implementation handy, just always use
|
||||
* crc64
|
||||
*/
|
||||
SET_CACHE_SB_CSUM_TYPE(sb, BCH_CSUM_CRC64);
|
||||
|
||||
for (i = 0; i < sb->nr_in_set; i++) {
|
||||
struct cache_member *m = sb->members + i;
|
||||
|
||||
sb->uuid = m->uuid;
|
||||
|
||||
sb->nbuckets = getblocks(fds[i]) / sb->bucket_size;
|
||||
sb->nr_this_dev = i;
|
||||
sb->first_bucket = (23 / sb->bucket_size) + 1;
|
||||
|
||||
if (sb->nbuckets < 1 << 7) {
|
||||
fprintf(stderr, "Not enough buckets: %llu, need %u\n",
|
||||
sb->nbuckets, 1 << 7);
|
||||
exit(EXIT_FAILURE);
|
||||
}
|
||||
|
||||
sb->csum = csum_set(sb, CACHE_SB_CSUM_TYPE(sb));
|
||||
|
||||
uuid_unparse(sb->uuid.b, uuid_str);
|
||||
uuid_unparse(sb->set_uuid.b, set_uuid_str);
|
||||
printf("UUID: %s\n"
|
||||
"Set UUID: %s\n"
|
||||
"version: %u\n"
|
||||
"nbuckets: %llu\n"
|
||||
"block_size: %u\n"
|
||||
"bucket_size: %u\n"
|
||||
"nr_in_set: %u\n"
|
||||
"nr_this_dev: %u\n"
|
||||
"first_bucket: %u\n",
|
||||
uuid_str, set_uuid_str,
|
||||
(unsigned) sb->version,
|
||||
sb->nbuckets,
|
||||
sb->block_size,
|
||||
sb->bucket_size,
|
||||
sb->nr_in_set,
|
||||
sb->nr_this_dev,
|
||||
sb->first_bucket);
|
||||
|
||||
do_write_sb(fds[i], sb);
|
||||
}
|
||||
}
|
||||
|
||||
static void next_cache_device(struct cache_sb *sb,
|
||||
unsigned replication_set,
|
||||
unsigned tier,
|
||||
unsigned replacement_policy,
|
||||
bool discard)
|
||||
{
|
||||
struct cache_member *m = sb->members + sb->nr_in_set;
|
||||
|
||||
SET_CACHE_REPLICATION_SET(m, replication_set);
|
||||
SET_CACHE_TIER(m, tier);
|
||||
SET_CACHE_REPLACEMENT(m, replacement_policy);
|
||||
SET_CACHE_DISCARD(m, discard);
|
||||
uuid_generate(m->uuid.b);
|
||||
|
||||
sb->nr_in_set++;
|
||||
}
|
||||
|
||||
static unsigned get_blocksize(const char *path)
|
||||
{
|
||||
struct stat statbuf;
|
||||
|
||||
if (stat(path, &statbuf)) {
|
||||
fprintf(stderr, "Error statting %s: %s\n",
|
||||
path, strerror(errno));
|
||||
exit(EXIT_FAILURE);
|
||||
}
|
||||
|
||||
if (S_ISBLK(statbuf.st_mode)) {
|
||||
/* check IO limits:
|
||||
* BLKALIGNOFF: alignment_offset
|
||||
* BLKPBSZGET: physical_block_size
|
||||
* BLKSSZGET: logical_block_size
|
||||
* BLKIOMIN: minimum_io_size
|
||||
* BLKIOOPT: optimal_io_size
|
||||
*
|
||||
* It may be tempting to use physical_block_size,
|
||||
* or even minimum_io_size.
|
||||
* But to be as transparent as possible,
|
||||
* we want to use logical_block_size.
|
||||
*/
|
||||
unsigned int logical_block_size;
|
||||
int fd = open(path, O_RDONLY);
|
||||
|
||||
if (fd < 0) {
|
||||
fprintf(stderr, "open(%s) failed: %m\n", path);
|
||||
exit(EXIT_FAILURE);
|
||||
}
|
||||
if (ioctl(fd, BLKSSZGET, &logical_block_size)) {
|
||||
fprintf(stderr, "ioctl(%s, BLKSSZGET) failed: %m\n", path);
|
||||
exit(EXIT_FAILURE);
|
||||
}
|
||||
close(fd);
|
||||
return logical_block_size / 512;
|
||||
|
||||
}
|
||||
/* else: not a block device.
|
||||
* Why would we even want to write a bcache super block there? */
|
||||
|
||||
return statbuf.st_blksize / 512;
|
||||
}
|
||||
|
||||
static long strtoul_or_die(const char *p, size_t max, const char *msg)
|
||||
{
|
||||
errno = 0;
|
||||
long v = strtol(optarg, NULL, 10);
|
||||
if (errno || v < 0 || v >= max) {
|
||||
fprintf(stderr, "Invalid %s %zi\n", msg, v);
|
||||
exit(EXIT_FAILURE);
|
||||
}
|
||||
|
||||
return v;
|
||||
}
|
||||
|
||||
int main(int argc, char **argv)
|
||||
{
|
||||
int c, bdev = -1;
|
||||
size_t i, nr_backing_devices = 0;
|
||||
|
||||
unsigned block_size = 0, bucket_size = 1024;
|
||||
unsigned block_size = 0;
|
||||
unsigned bucket_sizes[argc];
|
||||
int num_bucket_sizes = 0;
|
||||
int writeback = 0, discard = 0, wipe_bcache = 0;
|
||||
unsigned replication_set = 0, tier = 0, replacement_policy = 0;
|
||||
uint64_t data_offset = BDEV_DATA_START_DEFAULT;
|
||||
@ -418,6 +114,7 @@ int main(int argc, char **argv)
|
||||
SET_CACHE_PREFERRED_CSUM_TYPE(cache_set_sb, BCH_CSUM_CRC32C);
|
||||
SET_CACHE_SET_META_REPLICAS_WANT(cache_set_sb, 1);
|
||||
SET_CACHE_SET_DATA_REPLICAS_WANT(cache_set_sb, 1);
|
||||
bucket_sizes[0] = 1024;
|
||||
|
||||
while ((c = getopt_long(argc, argv,
|
||||
"-hCBU:w:b:l:",
|
||||
@ -448,7 +145,8 @@ int main(int argc, char **argv)
|
||||
break;
|
||||
|
||||
case 'b':
|
||||
bucket_size = hatoi_validate(optarg, "bucket size");
|
||||
bucket_sizes[num_bucket_sizes] = hatoi_validate(optarg, "bucket size");
|
||||
num_bucket_sizes++;
|
||||
break;
|
||||
case 'w':
|
||||
block_size = hatoi_validate(optarg, "block size");
|
||||
@ -518,10 +216,14 @@ int main(int argc, char **argv)
|
||||
usage();
|
||||
}
|
||||
|
||||
if (bucket_size < block_size) {
|
||||
fprintf(stderr, "Bucket size cannot be smaller than block size\n");
|
||||
exit(EXIT_FAILURE);
|
||||
}
|
||||
i = 0;
|
||||
do {
|
||||
if (bucket_sizes[i] < block_size) {
|
||||
fprintf(stderr, "Bucket size cannot be smaller than block size\n");
|
||||
exit(EXIT_FAILURE);
|
||||
}
|
||||
i++;
|
||||
} while (i < num_bucket_sizes);
|
||||
|
||||
if (!block_size) {
|
||||
for (i = 0; i < cache_set_sb->nr_in_set; i++)
|
||||
@ -539,11 +241,12 @@ int main(int argc, char **argv)
|
||||
for (i = 0; i < nr_backing_devices; i++)
|
||||
backing_dev_fd[i] = dev_open(backing_devices[i], wipe_bcache);
|
||||
|
||||
write_cache_sbs(cache_dev_fd, cache_set_sb, block_size, bucket_size);
|
||||
write_cache_sbs(cache_dev_fd, cache_set_sb, block_size,
|
||||
bucket_sizes, num_bucket_sizes);
|
||||
|
||||
for (i = 0; i < nr_backing_devices; i++)
|
||||
write_backingdev_sb(backing_dev_fd[i],
|
||||
block_size, bucket_size,
|
||||
block_size, bucket_sizes,
|
||||
writeback, data_offset,
|
||||
backing_dev_labels[i],
|
||||
cache_set_sb->set_uuid);
|
||||
|
Loading…
Reference in New Issue
Block a user