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-rw-r--r--c_src/libbcachefs.c753
1 files changed, 753 insertions, 0 deletions
diff --git a/c_src/libbcachefs.c b/c_src/libbcachefs.c
new file mode 100644
index 00000000..ef4cc718
--- /dev/null
+++ b/c_src/libbcachefs.c
@@ -0,0 +1,753 @@
+#include <ctype.h>
+#include <dirent.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <libgen.h>
+#include <stdbool.h>
+#include <stdint.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/stat.h>
+#include <sys/sysmacros.h>
+#include <sys/types.h>
+#include <time.h>
+#include <unistd.h>
+
+#include <uuid/uuid.h>
+
+#include "libbcachefs.h"
+#include "crypto.h"
+#include "libbcachefs/bcachefs_format.h"
+#include "libbcachefs/btree_cache.h"
+#include "libbcachefs/checksum.h"
+#include "libbcachefs/disk_groups.h"
+#include "libbcachefs/journal_seq_blacklist.h"
+#include "libbcachefs/opts.h"
+#include "libbcachefs/replicas.h"
+#include "libbcachefs/super-io.h"
+#include "tools-util.h"
+
+#define NSEC_PER_SEC 1000000000L
+
+static void init_layout(struct bch_sb_layout *l,
+ unsigned block_size,
+ unsigned sb_size,
+ u64 sb_start, u64 sb_end)
+{
+ u64 sb_pos = sb_start;
+ unsigned i;
+
+ memset(l, 0, sizeof(*l));
+
+ l->magic = BCHFS_MAGIC;
+ l->layout_type = 0;
+ l->nr_superblocks = 2;
+ l->sb_max_size_bits = ilog2(sb_size);
+
+ /* Create two superblocks in the allowed range: */
+ for (i = 0; i < l->nr_superblocks; i++) {
+ if (sb_pos != BCH_SB_SECTOR)
+ sb_pos = round_up(sb_pos, block_size >> 9);
+
+ l->sb_offset[i] = cpu_to_le64(sb_pos);
+ sb_pos += sb_size;
+ }
+
+ if (sb_pos > sb_end)
+ die("insufficient space for superblocks: start %llu end %llu > %llu size %u",
+ sb_start, sb_pos, sb_end, sb_size);
+}
+
+/* minimum size filesystem we can create, given a bucket size: */
+static u64 min_size(unsigned bucket_size)
+{
+ return BCH_MIN_NR_NBUCKETS * bucket_size;
+}
+
+u64 bch2_pick_bucket_size(struct bch_opts opts, struct dev_opts *dev)
+{
+ u64 bucket_size;
+
+ if (dev->size < min_size(opts.block_size))
+ die("cannot format %s, too small (%llu bytes, min %llu)",
+ dev->path, dev->size, min_size(opts.block_size));
+
+ /* Bucket size must be >= block size: */
+ bucket_size = opts.block_size;
+
+ /* Bucket size must be >= btree node size: */
+ if (opt_defined(opts, btree_node_size))
+ bucket_size = max_t(unsigned, bucket_size,
+ opts.btree_node_size);
+
+ /* Want a bucket size of at least 128k, if possible: */
+ bucket_size = max(bucket_size, 128ULL << 10);
+
+ if (dev->size >= min_size(bucket_size)) {
+ unsigned scale = max(1,
+ ilog2(dev->size / min_size(bucket_size)) / 4);
+
+ scale = rounddown_pow_of_two(scale);
+
+ /* max bucket size 1 mb */
+ bucket_size = min(bucket_size * scale, 1ULL << 20);
+ } else {
+ do {
+ bucket_size /= 2;
+ } while (dev->size < min_size(bucket_size));
+ }
+
+ return bucket_size;
+}
+
+void bch2_check_bucket_size(struct bch_opts opts, struct dev_opts *dev)
+{
+ if (dev->bucket_size < opts.block_size)
+ die("Bucket size (%llu) cannot be smaller than block size (%u)",
+ dev->bucket_size, opts.block_size);
+
+ if (opt_defined(opts, btree_node_size) &&
+ dev->bucket_size < opts.btree_node_size)
+ die("Bucket size (%llu) cannot be smaller than btree node size (%u)",
+ dev->bucket_size, opts.btree_node_size);
+
+ if (dev->nbuckets < BCH_MIN_NR_NBUCKETS)
+ die("Not enough buckets: %llu, need %u (bucket size %llu)",
+ dev->nbuckets, BCH_MIN_NR_NBUCKETS, dev->bucket_size);
+
+ if (dev->bucket_size > (u32) U16_MAX << 9)
+ die("Bucket size (%llu) too big (max %u)",
+ dev->bucket_size, (u32) U16_MAX << 9);
+}
+
+static unsigned parse_target(struct bch_sb_handle *sb,
+ struct dev_opts *devs, size_t nr_devs,
+ const char *s)
+{
+ struct dev_opts *i;
+ int idx;
+
+ if (!s)
+ return 0;
+
+ for (i = devs; i < devs + nr_devs; i++)
+ if (!strcmp(s, i->path))
+ return dev_to_target(i - devs);
+
+ idx = bch2_disk_path_find(sb, s);
+ if (idx >= 0)
+ return group_to_target(idx);
+
+ die("Invalid target %s", s);
+ return 0;
+}
+
+struct bch_sb *bch2_format(struct bch_opt_strs fs_opt_strs,
+ struct bch_opts fs_opts,
+ struct format_opts opts,
+ struct dev_opts *devs,
+ size_t nr_devs)
+{
+ struct bch_sb_handle sb = { NULL };
+ struct dev_opts *i;
+ unsigned max_dev_block_size = 0;
+ unsigned opt_id;
+ u64 min_bucket_size = U64_MAX;
+
+ for (i = devs; i < devs + nr_devs; i++)
+ max_dev_block_size = max(max_dev_block_size, get_blocksize(i->bdev->bd_fd));
+
+ /* calculate block size: */
+ if (!opt_defined(fs_opts, block_size)) {
+ opt_set(fs_opts, block_size, max_dev_block_size);
+ } else if (fs_opts.block_size < max_dev_block_size)
+ die("blocksize too small: %u, must be greater than device blocksize %u",
+ fs_opts.block_size, max_dev_block_size);
+
+ /* get device size, if it wasn't specified: */
+ for (i = devs; i < devs + nr_devs; i++)
+ if (!i->size)
+ i->size = get_size(i->bdev->bd_fd);
+
+ /* calculate bucket sizes: */
+ for (i = devs; i < devs + nr_devs; i++)
+ min_bucket_size = min(min_bucket_size,
+ i->bucket_size ?: bch2_pick_bucket_size(fs_opts, i));
+
+ for (i = devs; i < devs + nr_devs; i++)
+ if (!i->bucket_size)
+ i->bucket_size = min_bucket_size;
+
+ for (i = devs; i < devs + nr_devs; i++) {
+ i->nbuckets = i->size / i->bucket_size;
+ bch2_check_bucket_size(fs_opts, i);
+ }
+
+ /* calculate btree node size: */
+ if (!opt_defined(fs_opts, btree_node_size)) {
+ /* 256k default btree node size */
+ opt_set(fs_opts, btree_node_size, 256 << 10);
+
+ for (i = devs; i < devs + nr_devs; i++)
+ fs_opts.btree_node_size =
+ min_t(unsigned, fs_opts.btree_node_size,
+ i->bucket_size);
+ }
+
+ if (uuid_is_null(opts.uuid.b))
+ uuid_generate(opts.uuid.b);
+
+ if (bch2_sb_realloc(&sb, 0))
+ die("insufficient memory");
+
+ sb.sb->version = le16_to_cpu(opts.version);
+ sb.sb->version_min = le16_to_cpu(opts.version);
+ sb.sb->magic = BCHFS_MAGIC;
+ sb.sb->user_uuid = opts.uuid;
+ sb.sb->nr_devices = nr_devs;
+
+ if (opts.version == bcachefs_metadata_version_current)
+ sb.sb->features[0] |= cpu_to_le64(BCH_SB_FEATURES_ALL);
+
+ uuid_generate(sb.sb->uuid.b);
+
+ if (opts.label)
+ memcpy(sb.sb->label,
+ opts.label,
+ min(strlen(opts.label), sizeof(sb.sb->label)));
+
+ for (opt_id = 0;
+ opt_id < bch2_opts_nr;
+ opt_id++) {
+ u64 v;
+
+ v = bch2_opt_defined_by_id(&fs_opts, opt_id)
+ ? bch2_opt_get_by_id(&fs_opts, opt_id)
+ : bch2_opt_get_by_id(&bch2_opts_default, opt_id);
+
+ __bch2_opt_set_sb(sb.sb, &bch2_opt_table[opt_id], v);
+ }
+
+ struct timespec now;
+ if (clock_gettime(CLOCK_REALTIME, &now))
+ die("error getting current time: %m");
+
+ sb.sb->time_base_lo = cpu_to_le64(now.tv_sec * NSEC_PER_SEC + now.tv_nsec);
+ sb.sb->time_precision = cpu_to_le32(1);
+
+ /* Member info: */
+ struct bch_sb_field_members_v2 *mi =
+ bch2_sb_field_resize(&sb, members_v2,
+ (sizeof(*mi) + sizeof(struct bch_member) *
+ nr_devs) / sizeof(u64));
+ mi->member_bytes = cpu_to_le16(sizeof(struct bch_member));
+ for (i = devs; i < devs + nr_devs; i++) {
+ struct bch_member *m = bch2_members_v2_get_mut(sb.sb, (i - devs));
+
+ uuid_generate(m->uuid.b);
+ m->nbuckets = cpu_to_le64(i->nbuckets);
+ m->first_bucket = 0;
+ m->bucket_size = cpu_to_le16(i->bucket_size >> 9);
+
+ SET_BCH_MEMBER_DISCARD(m, i->discard);
+ SET_BCH_MEMBER_DATA_ALLOWED(m, i->data_allowed);
+ SET_BCH_MEMBER_DURABILITY(m, i->durability + 1);
+ }
+
+ /* Disk labels*/
+ for (i = devs; i < devs + nr_devs; i++) {
+ struct bch_member *m;
+ int idx;
+
+ if (!i->label)
+ continue;
+
+ idx = bch2_disk_path_find_or_create(&sb, i->label);
+ if (idx < 0)
+ die("error creating disk path: %s", strerror(-idx));
+
+ /*
+ * Recompute mi and m after each sb modification: its location
+ * in memory may have changed due to reallocation.
+ */
+ m = bch2_members_v2_get_mut(sb.sb, (i - devs));
+ SET_BCH_MEMBER_GROUP(m, idx + 1);
+ }
+
+ SET_BCH_SB_FOREGROUND_TARGET(sb.sb,
+ parse_target(&sb, devs, nr_devs, fs_opt_strs.foreground_target));
+ SET_BCH_SB_BACKGROUND_TARGET(sb.sb,
+ parse_target(&sb, devs, nr_devs, fs_opt_strs.background_target));
+ SET_BCH_SB_PROMOTE_TARGET(sb.sb,
+ parse_target(&sb, devs, nr_devs, fs_opt_strs.promote_target));
+ SET_BCH_SB_METADATA_TARGET(sb.sb,
+ parse_target(&sb, devs, nr_devs, fs_opt_strs.metadata_target));
+
+ /* Crypt: */
+ if (opts.encrypted) {
+ struct bch_sb_field_crypt *crypt =
+ bch2_sb_field_resize(&sb, crypt, sizeof(*crypt) / sizeof(u64));
+
+ bch_sb_crypt_init(sb.sb, crypt, opts.passphrase);
+ SET_BCH_SB_ENCRYPTION_TYPE(sb.sb, 1);
+ }
+
+ bch2_sb_members_cpy_v2_v1(&sb);
+
+ for (i = devs; i < devs + nr_devs; i++) {
+ u64 size_sectors = i->size >> 9;
+
+ sb.sb->dev_idx = i - devs;
+
+ if (!i->sb_offset) {
+ i->sb_offset = BCH_SB_SECTOR;
+ i->sb_end = size_sectors;
+ }
+
+ init_layout(&sb.sb->layout, fs_opts.block_size,
+ opts.superblock_size,
+ i->sb_offset, i->sb_end);
+
+ /*
+ * Also create a backup superblock at the end of the disk:
+ *
+ * If we're not creating a superblock at the default offset, it
+ * means we're being run from the migrate tool and we could be
+ * overwriting existing data if we write to the end of the disk:
+ */
+ if (i->sb_offset == BCH_SB_SECTOR) {
+ struct bch_sb_layout *l = &sb.sb->layout;
+ u64 backup_sb = size_sectors - (1 << l->sb_max_size_bits);
+
+ backup_sb = rounddown(backup_sb, i->bucket_size >> 9);
+ l->sb_offset[l->nr_superblocks++] = cpu_to_le64(backup_sb);
+ }
+
+ if (i->sb_offset == BCH_SB_SECTOR) {
+ /* Zero start of disk */
+ static const char zeroes[BCH_SB_SECTOR << 9];
+
+ xpwrite(i->bdev->bd_fd, zeroes, BCH_SB_SECTOR << 9, 0,
+ "zeroing start of disk");
+ }
+
+ bch2_super_write(i->bdev->bd_fd, sb.sb);
+ close(i->bdev->bd_fd);
+ }
+
+ return sb.sb;
+}
+
+void bch2_super_write(int fd, struct bch_sb *sb)
+{
+ struct nonce nonce = { 0 };
+ unsigned bs = get_blocksize(fd);
+
+ unsigned i;
+ for (i = 0; i < sb->layout.nr_superblocks; i++) {
+ sb->offset = sb->layout.sb_offset[i];
+
+ if (sb->offset == BCH_SB_SECTOR) {
+ /* Write backup layout */
+
+ BUG_ON(bs > 4096);
+
+ char *buf = aligned_alloc(bs, bs);
+ xpread(fd, buf, bs, 4096 - bs);
+ memcpy(buf + bs - sizeof(sb->layout),
+ &sb->layout,
+ sizeof(sb->layout));
+ xpwrite(fd, buf, bs, 4096 - bs,
+ "backup layout");
+ free(buf);
+
+ }
+
+ sb->csum = csum_vstruct(NULL, BCH_SB_CSUM_TYPE(sb), nonce, sb);
+ xpwrite(fd, sb, round_up(vstruct_bytes(sb), bs),
+ le64_to_cpu(sb->offset) << 9,
+ "superblock");
+ }
+
+ fsync(fd);
+}
+
+struct bch_sb *__bch2_super_read(int fd, u64 sector)
+{
+ struct bch_sb sb, *ret;
+
+ xpread(fd, &sb, sizeof(sb), sector << 9);
+
+ if (memcmp(&sb.magic, &BCACHE_MAGIC, sizeof(sb.magic)) &&
+ memcmp(&sb.magic, &BCHFS_MAGIC, sizeof(sb.magic)))
+ die("not a bcachefs superblock");
+
+ size_t bytes = vstruct_bytes(&sb);
+
+ ret = malloc(bytes);
+
+ xpread(fd, ret, bytes, sector << 9);
+
+ return ret;
+}
+
+/* ioctl interface: */
+
+/* Global control device: */
+int bcachectl_open(void)
+{
+ return xopen("/dev/bcachefs-ctl", O_RDWR);
+}
+
+/* Filesystem handles (ioctl, sysfs dir): */
+
+#define SYSFS_BASE "/sys/fs/bcachefs/"
+
+void bcache_fs_close(struct bchfs_handle fs)
+{
+ close(fs.ioctl_fd);
+ close(fs.sysfs_fd);
+}
+
+struct bchfs_handle bcache_fs_open(const char *path)
+{
+ struct bchfs_handle ret;
+
+ if (!uuid_parse(path, ret.uuid.b)) {
+ /* It's a UUID, look it up in sysfs: */
+ char *sysfs = mprintf(SYSFS_BASE "%s", path);
+ ret.sysfs_fd = xopen(sysfs, O_RDONLY);
+
+ char *minor = read_file_str(ret.sysfs_fd, "minor");
+ char *ctl = mprintf("/dev/bcachefs%s-ctl", minor);
+ ret.ioctl_fd = xopen(ctl, O_RDWR);
+
+ free(sysfs);
+ free(minor);
+ free(ctl);
+ } else {
+ /* It's a path: */
+ ret.ioctl_fd = open(path, O_RDONLY);
+ if (ret.ioctl_fd < 0)
+ die("Error opening filesystem at %s: %m", path);
+
+ struct bch_ioctl_query_uuid uuid;
+ if (ioctl(ret.ioctl_fd, BCH_IOCTL_QUERY_UUID, &uuid) < 0)
+ die("error opening %s: not a bcachefs filesystem", path);
+
+ ret.uuid = uuid.uuid;
+
+ char uuid_str[40];
+ uuid_unparse(uuid.uuid.b, uuid_str);
+
+ char *sysfs = mprintf(SYSFS_BASE "%s", uuid_str);
+ ret.sysfs_fd = xopen(sysfs, O_RDONLY);
+ free(sysfs);
+ }
+
+ return ret;
+}
+
+/*
+ * Given a path to a block device, open the filesystem it belongs to; also
+ * return the device's idx:
+ */
+struct bchfs_handle bchu_fs_open_by_dev(const char *path, int *idx)
+{
+ struct bch_opts opts = bch2_opts_empty();
+ char buf[1024], *uuid_str;
+
+ struct stat stat = xstat(path);
+
+ if (S_ISBLK(stat.st_mode)) {
+ char *sysfs = mprintf("/sys/dev/block/%u:%u/bcachefs",
+ major(stat.st_dev),
+ minor(stat.st_dev));
+
+ ssize_t len = readlink(sysfs, buf, sizeof(buf));
+ free(sysfs);
+
+ if (len <= 0)
+ goto read_super;
+
+ char *p = strrchr(buf, '/');
+ if (!p || sscanf(p + 1, "dev-%u", idx) != 1)
+ die("error parsing sysfs");
+
+ *p = '\0';
+ p = strrchr(buf, '/');
+ uuid_str = p + 1;
+ } else {
+read_super:
+ opt_set(opts, noexcl, true);
+ opt_set(opts, nochanges, true);
+
+ struct bch_sb_handle sb;
+ int ret = bch2_read_super(path, &opts, &sb);
+ if (ret)
+ die("Error opening %s: %s", path, strerror(-ret));
+
+ *idx = sb.sb->dev_idx;
+ uuid_str = buf;
+ uuid_unparse(sb.sb->user_uuid.b, uuid_str);
+
+ bch2_free_super(&sb);
+ }
+
+ return bcache_fs_open(uuid_str);
+}
+
+int bchu_dev_path_to_idx(struct bchfs_handle fs, const char *dev_path)
+{
+ int idx;
+ struct bchfs_handle fs2 = bchu_fs_open_by_dev(dev_path, &idx);
+
+ if (memcmp(&fs.uuid, &fs2.uuid, sizeof(fs.uuid)))
+ idx = -1;
+ bcache_fs_close(fs2);
+ return idx;
+}
+
+int bchu_data(struct bchfs_handle fs, struct bch_ioctl_data cmd)
+{
+ int progress_fd = xioctl(fs.ioctl_fd, BCH_IOCTL_DATA, &cmd);
+
+ while (1) {
+ struct bch_ioctl_data_event e;
+
+ if (read(progress_fd, &e, sizeof(e)) != sizeof(e))
+ die("error reading from progress fd %m");
+
+ if (e.type)
+ continue;
+
+ if (e.p.data_type == U8_MAX)
+ break;
+
+ printf("\33[2K\r");
+
+ printf("%llu%% complete: current position %s",
+ e.p.sectors_total
+ ? e.p.sectors_done * 100 / e.p.sectors_total
+ : 0,
+ bch2_data_types[e.p.data_type]);
+
+ switch (e.p.data_type) {
+ case BCH_DATA_btree:
+ case BCH_DATA_user:
+ printf(" %s:%llu:%llu",
+ bch2_btree_id_str(e.p.btree_id),
+ e.p.pos.inode,
+ e.p.pos.offset);
+ }
+
+ fflush(stdout);
+ sleep(1);
+ }
+ printf("\nDone\n");
+
+ close(progress_fd);
+ return 0;
+}
+
+/* option parsing */
+
+void bch2_opt_strs_free(struct bch_opt_strs *opts)
+{
+ unsigned i;
+
+ for (i = 0; i < bch2_opts_nr; i++) {
+ free(opts->by_id[i]);
+ opts->by_id[i] = NULL;
+ }
+}
+
+struct bch_opt_strs bch2_cmdline_opts_get(int *argc, char *argv[],
+ unsigned opt_types)
+{
+ struct bch_opt_strs opts;
+ unsigned i = 1;
+
+ memset(&opts, 0, sizeof(opts));
+
+ while (i < *argc) {
+ char *optstr = strcmp_prefix(argv[i], "--");
+ char *valstr = NULL, *p;
+ int optid, nr_args = 1;
+
+ if (!optstr) {
+ i++;
+ continue;
+ }
+
+ optstr = strdup(optstr);
+
+ p = optstr;
+ while (isalpha(*p) || *p == '_')
+ p++;
+
+ if (*p == '=') {
+ *p = '\0';
+ valstr = p + 1;
+ }
+
+ optid = bch2_opt_lookup(optstr);
+ if (optid < 0 ||
+ !(bch2_opt_table[optid].flags & opt_types)) {
+ i++;
+ goto next;
+ }
+
+ if (!valstr &&
+ bch2_opt_table[optid].type != BCH_OPT_BOOL) {
+ nr_args = 2;
+ valstr = argv[i + 1];
+ }
+
+ if (!valstr)
+ valstr = "1";
+
+ opts.by_id[optid] = strdup(valstr);
+
+ *argc -= nr_args;
+ memmove(&argv[i],
+ &argv[i + nr_args],
+ sizeof(char *) * (*argc - i));
+ argv[*argc] = NULL;
+next:
+ free(optstr);
+ }
+
+ return opts;
+}
+
+struct bch_opts bch2_parse_opts(struct bch_opt_strs strs)
+{
+ struct bch_opts opts = bch2_opts_empty();
+ struct printbuf err = PRINTBUF;
+ unsigned i;
+ int ret;
+ u64 v;
+
+ for (i = 0; i < bch2_opts_nr; i++) {
+ if (!strs.by_id[i])
+ continue;
+
+ ret = bch2_opt_parse(NULL,
+ &bch2_opt_table[i],
+ strs.by_id[i], &v, &err);
+ if (ret < 0)
+ die("Invalid option %s", err.buf);
+
+ bch2_opt_set_by_id(&opts, i, v);
+ }
+
+ printbuf_exit(&err);
+ return opts;
+}
+
+#define newline(c) \
+ do { \
+ printf("\n"); \
+ c = 0; \
+ } while(0)
+void bch2_opts_usage(unsigned opt_types)
+{
+ const struct bch_option *opt;
+ unsigned i, c = 0, helpcol = 30;
+
+
+
+ for (opt = bch2_opt_table;
+ opt < bch2_opt_table + bch2_opts_nr;
+ opt++) {
+ if (!(opt->flags & opt_types))
+ continue;
+
+ c += printf(" --%s", opt->attr.name);
+
+ switch (opt->type) {
+ case BCH_OPT_BOOL:
+ break;
+ case BCH_OPT_STR:
+ c += printf("=(");
+ for (i = 0; opt->choices[i]; i++) {
+ if (i)
+ c += printf("|");
+ c += printf("%s", opt->choices[i]);
+ }
+ c += printf(")");
+ break;
+ default:
+ c += printf("=%s", opt->hint);
+ break;
+ }
+
+ if (opt->help) {
+ const char *l = opt->help;
+
+ if (c >= helpcol)
+ newline(c);
+
+ while (1) {
+ const char *n = strchrnul(l, '\n');
+
+ while (c < helpcol) {
+ putchar(' ');
+ c++;
+ }
+ printf("%.*s", (int) (n - l), l);
+ newline(c);
+
+ if (!*n)
+ break;
+ l = n + 1;
+ }
+ } else {
+ newline(c);
+ }
+ }
+}
+
+dev_names bchu_fs_get_devices(struct bchfs_handle fs)
+{
+ DIR *dir = fdopendir(fs.sysfs_fd);
+ struct dirent *d;
+ dev_names devs;
+
+ darray_init(&devs);
+
+ while ((errno = 0), (d = readdir(dir))) {
+ struct dev_name n = { 0, NULL, NULL };
+
+ if (sscanf(d->d_name, "dev-%u", &n.idx) != 1)
+ continue;
+
+ char *block_attr = mprintf("dev-%u/block", n.idx);
+
+ char sysfs_block_buf[4096];
+ ssize_t r = readlinkat(fs.sysfs_fd, block_attr,
+ sysfs_block_buf, sizeof(sysfs_block_buf));
+ if (r > 0) {
+ sysfs_block_buf[r] = '\0';
+ n.dev = strdup(basename(sysfs_block_buf));
+ }
+
+ free(block_attr);
+
+ char *label_attr = mprintf("dev-%u/label", n.idx);
+ n.label = read_file_str(fs.sysfs_fd, label_attr);
+ free(label_attr);
+
+ char *durability_attr = mprintf("dev-%u/durability", n.idx);
+ n.durability = read_file_u64(fs.sysfs_fd, durability_attr);
+ free(durability_attr);
+
+ darray_push(&devs, n);
+ }
+
+ closedir(dir);
+
+ return devs;
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-06-28 21:31:41 +0000