NULL
};
+const char * const set_attrs[] = {
+ "btree_flush_delay",
+ "btree_scan_ratelimit",
+ "bucket_reserve_percent",
+ "cache_reserve_percent",
+ "checksum_type",
+ "congested_read_threshold_us",
+ "congested_write_threshold_us",
+ "data_replicas",
+ "errors",
+ "foreground_target_percent",
+ "gc_sector_percent",
+ "journal_delay_ms",
+ "meta_replicas",
+ "sector_reserve_percent",
+ "tiering_percent",
+ NULL
+};
+
+const char * const cache_attrs[] = {
+ "cache_replacement_policy",
+ "discard",
+ "state",
+ "tier",
+ NULL
+};
+
+const char * const internal_attrs[] = {
+ "btree_shrinker_disabled",
+ "copy_gc_enabled",
+ "foreground_write_rate",
+ "tiering_enabled",
+ "tiering_rate",
+ NULL
+};
+
char *skip_spaces(const char *str)
{
while (isspace(*str))
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;
+ size_t bytes = ((void *) __bset_bkey_last(sb)) - (void *) sb;
/* Zero start of disk */
if (pwrite(fd, zeroes, SB_START, 0) != SB_START) {
}
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)
+ unsigned mode, uint64_t data_offset, const char *label,
+ uuid_le user_uuid, uuid_le set_uuid)
{
char uuid_str[40], set_uuid_str[40];
struct cache_sb sb;
sb.offset = SB_SECTOR;
sb.version = BCACHE_SB_VERSION_BDEV;
sb.magic = BCACHE_MAGIC;
- uuid_generate(sb.uuid.b);
+ uuid_generate(sb.disk_uuid.b);
+ sb.user_uuid = user_uuid;
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);
+ uuid_unparse(sb.disk_uuid.b, uuid_str);
+ uuid_unparse(sb.user_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);
+ SET_BDEV_CACHE_MODE(&sb, mode);
if (data_offset != BDEV_DATA_START_DEFAULT) {
sb.version = BCACHE_SB_VERSION_BDEV_WITH_OFFSET;
- sb.data_offset = data_offset;
+ sb.bdev_data_offset = data_offset;
}
sb.csum = csum_set(&sb, BCH_CSUM_CRC64);
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)
+ unsigned block_size, unsigned *bucket_sizes,
+ int num_bucket_sizes)
{
char uuid_str[40], set_uuid_str[40];
size_t i;
sb->version = BCACHE_SB_VERSION_CDEV_V3;
sb->magic = BCACHE_MAGIC;
sb->block_size = block_size;
- sb->keys = bch_journal_buckets_offset(sb);
+ sb->u64s = bch_journal_buckets_offset(sb);
/*
* don't have a userspace crc32c implementation handy, just always use
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));
+ if (num_bucket_sizes <= 1) {
+ m->bucket_size = bucket_sizes[0];
+ } else {
+ if (!bucket_sizes[i]) {
+ printf("No bucket size specified for cache %zu,"
+ " using the default of %u",
+ i, bucket_sizes[0]);
+ m->bucket_size = bucket_sizes[0];
+ } else {
+ m->bucket_size = bucket_sizes[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;
+ m->nbuckets = getblocks(fds[i]) / m->bucket_size;
+ m->first_bucket = (23 / m->bucket_size) + 1;
- if (sb->nbuckets < 1 << 7) {
+ if (m->nbuckets < 1 << 7) {
fprintf(stderr, "Not enough buckets: %llu, need %u\n",
- sb->nbuckets, 1 << 7);
+ m->nbuckets, 1 << 7);
exit(EXIT_FAILURE);
}
+ }
+
+ for (i = 0; i < sb->nr_in_set; i++) {
+ struct cache_member *m = sb->members + i;
+
+ SET_CACHE_BTREE_NODE_SIZE(sb, min_size);
+
+
+ sb->disk_uuid = m->uuid;
+ sb->nr_this_dev = i;
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);
+ uuid_unparse(sb->disk_uuid.b, uuid_str);
+ uuid_unparse(sb->user_uuid.b, set_uuid_str);
printf("UUID: %s\n"
"Set UUID: %s\n"
"version: %u\n"
"first_bucket: %u\n",
uuid_str, set_uuid_str,
(unsigned) sb->version,
- sb->nbuckets,
+ m->nbuckets,
sb->block_size,
- sb->bucket_size,
+ m->bucket_size,
sb->nr_in_set,
sb->nr_this_dev,
- sb->first_bucket);
+ m->first_bucket);
do_write_sb(fds[i], sb);
}
}
static void show_uuid_only(struct cache_sb *sb, char *dev_uuid) {
- uuid_unparse(sb->uuid.b, dev_uuid);
+ uuid_unparse(sb->disk_uuid.b, dev_uuid);
}
static void show_super_common(struct cache_sb *sb, bool force_csum)
printf(" [match]\n");
} else {
printf(" [expected %" PRIX64 "]\n", expected_csum);
- if (!force_csum) {
+ if (force_csum) {
fprintf(stderr, "Corrupt superblock (bad csum)\n");
exit(2);
}
printf("(empty)");
putchar('\n');
- uuid_unparse(sb->uuid.b, uuid);
+ uuid_unparse(sb->disk_uuid.b, uuid);
printf("dev.uuid\t\t%s\n", uuid);
- uuid_unparse(sb->set_uuid.b, uuid);
+ uuid_unparse(sb->user_uuid.b, uuid);
printf("cset.uuid\t\t%s\n", uuid);
}
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;
+ first_sector = sb->bdev_data_offset;
}
printf("dev.data.first_sector\t%ju\n"
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)
{
+ struct cache_member *m = sb->members + sb->nr_this_dev;
+
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);
+ m->bucket_size);
// total_sectors includes the superblock;
printf("dev.cache.first_sector\t%u\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,
+ m->bucket_size * m->first_bucket,
+ m->bucket_size * (m->nbuckets - m->first_bucket),
+ m->bucket_size * m->nbuckets,
CACHE_SYNC(sb) ? "yes" : "no",
sb->nr_this_dev,
sb->nr_in_set);
- show_cache_member(sb, sb->nr_this_dev);
+ 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));
}
-static int __sysfs_attr_type(char *attr, const char **attr_arr) {
- int i, j;
- for(i = 0; attr_arr[i] != NULL; i++)
+static int __sysfs_attr_type(const char *attr, const char * const *attr_arr)
+{
+ for (unsigned i = 0; attr_arr[i] != NULL; i++)
if(!strcmp(attr, attr_arr[i]))
return 1;
return 0;
}
-enum sysfs_attr sysfs_attr_type(char *attr) {
- int ret;
+enum sysfs_attr sysfs_attr_type(const char *attr)
+{
if(__sysfs_attr_type(attr, set_attrs))
return SET_ATTR;
if(__sysfs_attr_type(attr, cache_attrs))
return -1;
}
-static void __sysfs_attr_list(const char **attr_arr) {
- int i, j;
- for (i = 0; attr_arr[i] != NULL; i++)
+static void __sysfs_attr_list(const char * const *attr_arr)
+{
+ for (unsigned i = 0; attr_arr[i] != NULL; i++)
printf("%s\n", attr_arr[i]);
}
-void sysfs_attr_list() {
+void sysfs_attr_list()
+{
__sysfs_attr_list(set_attrs);
__sysfs_attr_list(cache_attrs);
__sysfs_attr_list(internal_attrs);
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);
+ size_t bytes = 4096;
+ struct cache_sb *sb = aligned_alloc(bytes, bytes);
- int fd = open(dev, O_RDONLY);
+ int fd = open(dev, O_RDONLY|O_DIRECT);
if (fd < 0) {
printf("Can't open dev %s: %s\n", dev, strerror(errno));
return NULL;
}
- if (pread(fd, sb, bytes, SB_START) != bytes) {
- fprintf(stderr, "Couldn't read\n");
- return NULL;
- }
-
- 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");
+ while (true) {
+ int ret = pread(fd, sb, bytes, SB_START);
+ if (ret < 0) {
+ fprintf(stderr, "Couldn't read superblock: %s\n",
+ strerror(errno));
+ close(fd);
+ free(sb);
return NULL;
+ } else if (bytes > sizeof(sb) + sb->u64s * sizeof(u64)) {
+ /* We read the whole superblock */
+ break;
}
+
+ /*
+ * otherwise double the size of our dest
+ * and read again
+ */
+ free(sb);
+ bytes *= 2;
+ sb = aligned_alloc(4096, bytes);
}
+ close(fd);
+
if(uuid_only) {
show_uuid_only(sb, dev_uuid);
return sb;
return sb;
}
-static void dev_name(const char *ugly_path) {
+char *dev_name(const char *ugly_path) {
char buf[32];
int i, end = strlen(ugly_path);
// Is the dev guaranteed to be in /dev?
// This is needed for finding the superblock with a query-dev
- printf("/dev%s\n", buf);
+ return strdup(buf);
}
-static void list_cacheset_devs(char *cset_dir, char *cset_name, bool parse_dev_name) {
- int i = 0;
- DIR *cachedir;
+static void list_cacheset_devs(char *cset_dir, char *cset_name, bool parse_dev_name)
+{
+ DIR *cachedir, *dir;
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);
+ struct dirent *ent;
+ snprintf(entry, MAX_PATH, "%s/%s", cset_dir, cset_name);
+
+ if((dir = opendir(entry)) != NULL) {
+ while((ent = readdir(dir)) != NULL) {
+ char buf[MAX_PATH];
+ int len;
+ char *tmp;
+
+ /*
+ * We are looking for all cache# directories
+ * do a strlen < 9 to skip over other entries
+ * that also start with "cache"
+ */
+ if(strncmp(ent->d_name, "cache", 5) ||
+ !(strlen(ent->d_name) < 9))
+ continue;
+
+ snprintf(entry, MAX_PATH, "%s/%s/%s",
+ cset_dir,
+ cset_name,
+ ent->d_name);
+
+ if((cachedir = opendir(entry)) == NULL)
+ continue;
+
+ if(stat(entry, &cache_stat))
+ continue;
+
+ if((len = readlink(entry, buf, sizeof(buf) - 1)) !=
+ -1) {
+ buf[len] = '\0';
+ if(parse_dev_name) {
+ tmp = dev_name(buf);
+ printf("/dev%s\n", tmp);
+ free(tmp);
+ } 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) {
+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
sb = query_dev(devname, false, false, true, dev_uuid);
if(!sb)
return err;
+ else
+ free(sb);
if(!strcmp(stats_dev_uuid, dev_uuid)) {
strcat(subdir, intbuf);
int ret, bcachefd;
char *err = NULL;
- bcachefd = open("/dev/bcache", O_RDWR);
+ bcachefd = open("/dev/bcache_extent0", O_RDWR);
if (bcachefd < 0) {
err = "Can't open bcache device";
goto err;
}
- ret = ioctl(bcachefd, BCH_IOCTL_UNREGISTER, devs);
+ ret = ioctl(bcachefd, BCH_IOCTL_STOP);
if (ret < 0) {
char tmp[64];
snprintf(tmp, 64, "ioctl unregister error: %s\n",
return err;
}
-char *add_devices(char *const *devs, char *uuid)
+char *add_devices(char *const *devs)
{
int ret, bcachefd;
char *err = NULL;
- bcachefd = open("/dev/bcache", O_RDWR);
+ bcachefd = open("/dev/bcache_extent0", O_RDWR);
if (bcachefd < 0) {
err = "Can't open bcache device";
goto err;
struct bch_ioctl_add_disks ia;
ia.devs = devs;
- ia.uuid = uuid;
ret = ioctl(bcachefd, BCH_IOCTL_ADD_DISKS, &ia);
if (ret < 0) {
int ret, bcachefd;
char *err = NULL;
- bcachefd = open("/dev/bcache", O_RDWR);
+ bcachefd = open("/dev/bcache_extent0", O_RDWR);
if (bcachefd < 0) {
err = "Can't open bcache device";
goto err;
return err;
}
+char *device_set_failed(const char *dev_uuid) {
+ int ret, bcachefd;
+ char *err = NULL;
+ uuid_le dev;
+ struct bch_ioctl_disk_failed df;
+
+ bcachefd = open("/dev/bcache_extent0", O_RDWR);
+ if (bcachefd < 0) {
+ err = "Can't open bcache device";
+ goto err;
+ }
+
+ uuid_parse(dev_uuid, dev.b);
+ df.dev_uuid = dev;
+
+ ret = ioctl(bcachefd, BCH_IOCTL_SET_DISK_FAILED, &df);
+ if (ret < 0) {
+ char tmp[128];
+ snprintf(tmp, 128, "ioctl set disk failed error %s\n",
+ strerror(ret));
+ err = strdup(tmp);
+ }
+
+err:
+ close(bcachefd);
+ return err;
+}
+
char *probe(char *dev, int udev)
{
struct cache_sb sb;
goto err;
}
- uuid_unparse(sb.uuid.b, uuid);
+ uuid_unparse(sb.disk_uuid.b, uuid);
if (udev)
printf("ID_FS_UUID=%s\n"
return err;
}
-char *read_stat_dir(DIR *dir, char *stats_dir, char *stat_name, bool print_val)
+char *read_stat_dir(DIR *dir, char *stats_dir, char *stat_name, char *ret)
{
struct stat statbuf;
char entry[MAX_PATH];
}
if (S_ISREG(statbuf.st_mode)) {
- char buf[MAX_PATH];
FILE *fp = NULL;
fp = fopen(entry, "r");
return NULL;
}
- while(fgets(buf, MAX_PATH, fp));
+ while(fgets(ret, MAX_PATH, fp));
+ fclose(fp);
+ }
+err:
+ return err;
+}
+
+char *bcache_get_capacity(const char *cset_dir, const char *capacity_uuid,
+ bool show_devs)
+{
+ char *err = NULL;
+ char bucket_size_path[MAX_PATH];
+ char nbuckets_path[MAX_PATH];
+ char avail_buckets_path[MAX_PATH];
+ char cache_path[MAX_PATH];
+
+ double bucket_sizes[MAX_DEVS];
+ double nbuckets[MAX_DEVS];
+ double avail_buckets[MAX_DEVS];
+ char *dev_names[MAX_DEVS];
+ int dev_count = 0, i;
+ char intbuf[4];
+ double total_cap = 0, total_free = 0;
+ int precision = 2;
+
+ snprintf(bucket_size_path, MAX_PATH, "%s/%s/%s/%s", cset_dir,
+ capacity_uuid, "cache0", "bucket_size_bytes");
+ snprintf(nbuckets_path, MAX_PATH, "%s/%s/%s/%s", cset_dir,
+ capacity_uuid, "cache0", "nbuckets");
+ snprintf(avail_buckets_path, MAX_PATH, "%s/%s/%s/%s", cset_dir,
+ capacity_uuid, "cache0", "available_buckets");
+ snprintf(cache_path, MAX_PATH, "%s/%s/%s", cset_dir, capacity_uuid,
+ "cache0");
+
+ while (true) {
+ char buf[MAX_PATH];
+ int len;
+ DIR *cache_dir;
+
+ if((cache_dir = opendir(cache_path)) == NULL)
+ break;
- if(print_val)
- printf("%s\n", buf);
+ err = read_stat_dir(cache_dir, cache_path,
+ "bucket_size_bytes", buf);
+ if (err)
+ goto err;
else
- printf("%s\n", stat_name);
- fclose(fp);
+ bucket_sizes[dev_count] = atof(buf);
+
+ err = read_stat_dir(cache_dir, cache_path,
+ "nbuckets", buf);
+ if (err)
+ goto err;
+ else
+ nbuckets[dev_count] = atof(buf);
+
+ err = read_stat_dir(cache_dir, cache_path,
+ "available_buckets", buf);
+ if (err)
+ goto err;
+ else
+ avail_buckets[dev_count] = atof(buf);
+
+ if((len = readlink(cache_path, buf, sizeof(buf) - 1)) != -1) {
+ buf[len] = '\0';
+ dev_names[dev_count] = dev_name(buf);
+ }
+
+ snprintf(intbuf, 4, "%d", dev_count);
+
+ /* remove i/stat and append i++/stat */
+ bucket_size_path[strlen(cache_path) - strlen(intbuf)] = 0;
+ nbuckets_path[strlen(cache_path) - strlen(intbuf)] = 0;
+ avail_buckets_path[strlen(cache_path) - strlen(intbuf)] = 0;
+ cache_path[strlen(cache_path) - strlen(intbuf)] = 0;
+
+ dev_count++;
+
+ strcat(cache_path, intbuf);
+ strcat(bucket_size_path, intbuf);
+ strcat(nbuckets_path, intbuf);
+ strcat(avail_buckets_path, intbuf);
+ }
+
+ printf("%-15s%-25s%-25s\n", "Device Name", "Capacity (512 Blocks)", "Free (512 Blocks)");
+
+ if (show_devs) {
+ for (i = 0; i < dev_count; i++) {
+ printf("%s%-11s%-25.*f%-25.*f\n", "/dev", dev_names[i],
+ precision,
+ (bucket_sizes[i] * nbuckets[i]) / 512,
+ precision,
+ (bucket_sizes[i] * avail_buckets[i]) / 512);
+ }
}
+
+ for (i = 0; i < dev_count; i++) {
+ total_cap += (bucket_sizes[i] * nbuckets[i]) / 512;
+ total_free += (bucket_sizes[i] * avail_buckets[i]) / 512;
+
+ }
+
+ printf("%-15s%-25.*f%-25.*f\n", "Total", precision, total_cap,
+ precision, total_free);
+
err:
+ for (i = 0; i < dev_count; i++)
+ if (dev_names[i])
+ free(dev_names[i]);
return err;
}