diff options
Diffstat (limited to 'fs/bcachefs/sb-members.c')
| -rw-r--r-- | fs/bcachefs/sb-members.c | 532 |
1 files changed, 532 insertions, 0 deletions
diff --git a/fs/bcachefs/sb-members.c b/fs/bcachefs/sb-members.c new file mode 100644 index 000000000000..116131f95815 --- /dev/null +++ b/fs/bcachefs/sb-members.c @@ -0,0 +1,532 @@ +// SPDX-License-Identifier: GPL-2.0 + +#include "bcachefs.h" +#include "btree_cache.h" +#include "disk_groups.h" +#include "error.h" +#include "opts.h" +#include "replicas.h" +#include "sb-members.h" +#include "super-io.h" + +void bch2_dev_missing(struct bch_fs *c, unsigned dev) +{ + if (dev != BCH_SB_MEMBER_INVALID) + bch2_fs_inconsistent(c, "pointer to nonexistent device %u", dev); +} + +void bch2_dev_bucket_missing(struct bch_fs *c, struct bpos bucket) +{ + bch2_fs_inconsistent(c, "pointer to nonexistent bucket %llu:%llu", bucket.inode, bucket.offset); +} + +#define x(t, n, ...) [n] = #t, +static const char * const bch2_iops_measurements[] = { + BCH_IOPS_MEASUREMENTS() + NULL +}; + +char * const bch2_member_error_strs[] = { + BCH_MEMBER_ERROR_TYPES() + NULL +}; +#undef x + +/* Code for bch_sb_field_members_v1: */ + +struct bch_member *bch2_members_v2_get_mut(struct bch_sb *sb, int i) +{ + return __bch2_members_v2_get_mut(bch2_sb_field_get(sb, members_v2), i); +} + +static struct bch_member members_v2_get(struct bch_sb_field_members_v2 *mi, int i) +{ + struct bch_member ret, *p = __bch2_members_v2_get_mut(mi, i); + memset(&ret, 0, sizeof(ret)); + memcpy(&ret, p, min_t(size_t, le16_to_cpu(mi->member_bytes), sizeof(ret))); + return ret; +} + +static struct bch_member *members_v1_get_mut(struct bch_sb_field_members_v1 *mi, int i) +{ + return (void *) mi->_members + (i * BCH_MEMBER_V1_BYTES); +} + +static struct bch_member members_v1_get(struct bch_sb_field_members_v1 *mi, int i) +{ + struct bch_member ret, *p = members_v1_get_mut(mi, i); + memset(&ret, 0, sizeof(ret)); + memcpy(&ret, p, min_t(size_t, BCH_MEMBER_V1_BYTES, sizeof(ret))); + return ret; +} + +struct bch_member bch2_sb_member_get(struct bch_sb *sb, int i) +{ + struct bch_sb_field_members_v2 *mi2 = bch2_sb_field_get(sb, members_v2); + if (mi2) + return members_v2_get(mi2, i); + struct bch_sb_field_members_v1 *mi1 = bch2_sb_field_get(sb, members_v1); + return members_v1_get(mi1, i); +} + +static int sb_members_v2_resize_entries(struct bch_fs *c) +{ + struct bch_sb_field_members_v2 *mi = bch2_sb_field_get(c->disk_sb.sb, members_v2); + + if (le16_to_cpu(mi->member_bytes) < sizeof(struct bch_member)) { + unsigned u64s = DIV_ROUND_UP((sizeof(*mi) + sizeof(mi->_members[0]) * + c->disk_sb.sb->nr_devices), 8); + + mi = bch2_sb_field_resize(&c->disk_sb, members_v2, u64s); + if (!mi) + return -BCH_ERR_ENOSPC_sb_members_v2; + + for (int i = c->disk_sb.sb->nr_devices - 1; i >= 0; --i) { + void *dst = (void *) mi->_members + (i * sizeof(struct bch_member)); + memmove(dst, __bch2_members_v2_get_mut(mi, i), le16_to_cpu(mi->member_bytes)); + memset(dst + le16_to_cpu(mi->member_bytes), + 0, (sizeof(struct bch_member) - le16_to_cpu(mi->member_bytes))); + } + mi->member_bytes = cpu_to_le16(sizeof(struct bch_member)); + } + return 0; +} + +int bch2_sb_members_v2_init(struct bch_fs *c) +{ + struct bch_sb_field_members_v1 *mi1; + struct bch_sb_field_members_v2 *mi2; + + if (!bch2_sb_field_get(c->disk_sb.sb, members_v2)) { + mi2 = bch2_sb_field_resize(&c->disk_sb, members_v2, + DIV_ROUND_UP(sizeof(*mi2) + + sizeof(struct bch_member) * c->sb.nr_devices, + sizeof(u64))); + mi1 = bch2_sb_field_get(c->disk_sb.sb, members_v1); + memcpy(&mi2->_members[0], &mi1->_members[0], + BCH_MEMBER_V1_BYTES * c->sb.nr_devices); + memset(&mi2->pad[0], 0, sizeof(mi2->pad)); + mi2->member_bytes = cpu_to_le16(BCH_MEMBER_V1_BYTES); + } + + return sb_members_v2_resize_entries(c); +} + +int bch2_sb_members_cpy_v2_v1(struct bch_sb_handle *disk_sb) +{ + struct bch_sb_field_members_v1 *mi1; + struct bch_sb_field_members_v2 *mi2; + + mi1 = bch2_sb_field_resize(disk_sb, members_v1, + DIV_ROUND_UP(sizeof(*mi1) + BCH_MEMBER_V1_BYTES * + disk_sb->sb->nr_devices, sizeof(u64))); + if (!mi1) + return -BCH_ERR_ENOSPC_sb_members; + + mi2 = bch2_sb_field_get(disk_sb->sb, members_v2); + + for (unsigned i = 0; i < disk_sb->sb->nr_devices; i++) + memcpy(members_v1_get_mut(mi1, i), __bch2_members_v2_get_mut(mi2, i), BCH_MEMBER_V1_BYTES); + + return 0; +} + +static int validate_member(struct printbuf *err, + struct bch_member m, + struct bch_sb *sb, + int i) +{ + if (le64_to_cpu(m.nbuckets) > BCH_MEMBER_NBUCKETS_MAX) { + prt_printf(err, "device %u: too many buckets (got %llu, max %u)", + i, le64_to_cpu(m.nbuckets), BCH_MEMBER_NBUCKETS_MAX); + return -BCH_ERR_invalid_sb_members; + } + + if (le64_to_cpu(m.nbuckets) - + le16_to_cpu(m.first_bucket) < BCH_MIN_NR_NBUCKETS) { + prt_printf(err, "device %u: not enough buckets (got %llu, max %u)", + i, le64_to_cpu(m.nbuckets), BCH_MIN_NR_NBUCKETS); + return -BCH_ERR_invalid_sb_members; + } + + if (le16_to_cpu(m.bucket_size) < + le16_to_cpu(sb->block_size)) { + prt_printf(err, "device %u: bucket size %u smaller than block size %u", + i, le16_to_cpu(m.bucket_size), le16_to_cpu(sb->block_size)); + return -BCH_ERR_invalid_sb_members; + } + + if (le16_to_cpu(m.bucket_size) < + BCH_SB_BTREE_NODE_SIZE(sb)) { + prt_printf(err, "device %u: bucket size %u smaller than btree node size %llu", + i, le16_to_cpu(m.bucket_size), BCH_SB_BTREE_NODE_SIZE(sb)); + return -BCH_ERR_invalid_sb_members; + } + + if (m.btree_bitmap_shift >= BCH_MI_BTREE_BITMAP_SHIFT_MAX) { + prt_printf(err, "device %u: invalid btree_bitmap_shift %u", i, m.btree_bitmap_shift); + return -BCH_ERR_invalid_sb_members; + } + + return 0; +} + +static void member_to_text(struct printbuf *out, + struct bch_member m, + struct bch_sb_field_disk_groups *gi, + struct bch_sb *sb, + int i) +{ + unsigned data_have = bch2_sb_dev_has_data(sb, i); + u64 bucket_size = le16_to_cpu(m.bucket_size); + u64 device_size = le64_to_cpu(m.nbuckets) * bucket_size; + + if (!bch2_member_alive(&m)) + return; + + prt_printf(out, "Device:\t%u\n", i); + + printbuf_indent_add(out, 2); + + prt_printf(out, "Label:\t"); + if (BCH_MEMBER_GROUP(&m)) { + unsigned idx = BCH_MEMBER_GROUP(&m) - 1; + + if (idx < disk_groups_nr(gi)) + prt_printf(out, "%s (%u)", + gi->entries[idx].label, idx); + else + prt_printf(out, "(bad disk labels section)"); + } else { + prt_printf(out, "(none)"); + } + prt_newline(out); + + prt_printf(out, "UUID:\t"); + pr_uuid(out, m.uuid.b); + prt_newline(out); + + prt_printf(out, "Size:\t"); + prt_units_u64(out, device_size << 9); + prt_newline(out); + + for (unsigned i = 0; i < BCH_MEMBER_ERROR_NR; i++) + prt_printf(out, "%s errors:\t%llu\n", bch2_member_error_strs[i], le64_to_cpu(m.errors[i])); + + for (unsigned i = 0; i < BCH_IOPS_NR; i++) + prt_printf(out, "%s iops:\t%u\n", bch2_iops_measurements[i], le32_to_cpu(m.iops[i])); + + prt_printf(out, "Bucket size:\t"); + prt_units_u64(out, bucket_size << 9); + prt_newline(out); + + prt_printf(out, "First bucket:\t%u\n", le16_to_cpu(m.first_bucket)); + prt_printf(out, "Buckets:\t%llu\n", le64_to_cpu(m.nbuckets)); + + prt_printf(out, "Last mount:\t"); + if (m.last_mount) + bch2_prt_datetime(out, le64_to_cpu(m.last_mount)); + else + prt_printf(out, "(never)"); + prt_newline(out); + + prt_printf(out, "Last superblock write:\t%llu\n", le64_to_cpu(m.seq)); + + prt_printf(out, "State:\t%s\n", + BCH_MEMBER_STATE(&m) < BCH_MEMBER_STATE_NR + ? bch2_member_states[BCH_MEMBER_STATE(&m)] + : "unknown"); + + prt_printf(out, "Data allowed:\t"); + if (BCH_MEMBER_DATA_ALLOWED(&m)) + prt_bitflags(out, __bch2_data_types, BCH_MEMBER_DATA_ALLOWED(&m)); + else + prt_printf(out, "(none)"); + prt_newline(out); + + prt_printf(out, "Has data:\t"); + if (data_have) + prt_bitflags(out, __bch2_data_types, data_have); + else + prt_printf(out, "(none)"); + prt_newline(out); + + prt_printf(out, "Btree allocated bitmap blocksize:\t"); + if (m.btree_bitmap_shift < 64) + prt_units_u64(out, 1ULL << m.btree_bitmap_shift); + else + prt_printf(out, "(invalid shift %u)", m.btree_bitmap_shift); + prt_newline(out); + + prt_printf(out, "Btree allocated bitmap:\t"); + bch2_prt_u64_base2_nbits(out, le64_to_cpu(m.btree_allocated_bitmap), 64); + prt_newline(out); + + prt_printf(out, "Durability:\t%llu\n", BCH_MEMBER_DURABILITY(&m) ? BCH_MEMBER_DURABILITY(&m) - 1 : 1); + + prt_printf(out, "Discard:\t%llu\n", BCH_MEMBER_DISCARD(&m)); + prt_printf(out, "Freespace initialized:\t%llu\n", BCH_MEMBER_FREESPACE_INITIALIZED(&m)); + + printbuf_indent_sub(out, 2); +} + +static int bch2_sb_members_v1_validate(struct bch_sb *sb, struct bch_sb_field *f, + enum bch_validate_flags flags, struct printbuf *err) +{ + struct bch_sb_field_members_v1 *mi = field_to_type(f, members_v1); + unsigned i; + + if ((void *) members_v1_get_mut(mi, sb->nr_devices) > vstruct_end(&mi->field)) { + prt_printf(err, "too many devices for section size"); + return -BCH_ERR_invalid_sb_members; + } + + for (i = 0; i < sb->nr_devices; i++) { + struct bch_member m = members_v1_get(mi, i); + + int ret = validate_member(err, m, sb, i); + if (ret) + return ret; + } + + return 0; +} + +static void bch2_sb_members_v1_to_text(struct printbuf *out, struct bch_sb *sb, + struct bch_sb_field *f) +{ + struct bch_sb_field_members_v1 *mi = field_to_type(f, members_v1); + struct bch_sb_field_disk_groups *gi = bch2_sb_field_get(sb, disk_groups); + unsigned i; + + for (i = 0; i < sb->nr_devices; i++) + member_to_text(out, members_v1_get(mi, i), gi, sb, i); +} + +const struct bch_sb_field_ops bch_sb_field_ops_members_v1 = { + .validate = bch2_sb_members_v1_validate, + .to_text = bch2_sb_members_v1_to_text, +}; + +static void bch2_sb_members_v2_to_text(struct printbuf *out, struct bch_sb *sb, + struct bch_sb_field *f) +{ + struct bch_sb_field_members_v2 *mi = field_to_type(f, members_v2); + struct bch_sb_field_disk_groups *gi = bch2_sb_field_get(sb, disk_groups); + unsigned i; + + for (i = 0; i < sb->nr_devices; i++) + member_to_text(out, members_v2_get(mi, i), gi, sb, i); +} + +static int bch2_sb_members_v2_validate(struct bch_sb *sb, struct bch_sb_field *f, + enum bch_validate_flags flags, struct printbuf *err) +{ + struct bch_sb_field_members_v2 *mi = field_to_type(f, members_v2); + size_t mi_bytes = (void *) __bch2_members_v2_get_mut(mi, sb->nr_devices) - + (void *) mi; + + if (mi_bytes > vstruct_bytes(&mi->field)) { + prt_printf(err, "section too small (%zu > %zu)", + mi_bytes, vstruct_bytes(&mi->field)); + return -BCH_ERR_invalid_sb_members; + } + + for (unsigned i = 0; i < sb->nr_devices; i++) { + int ret = validate_member(err, members_v2_get(mi, i), sb, i); + if (ret) + return ret; + } + + return 0; +} + +const struct bch_sb_field_ops bch_sb_field_ops_members_v2 = { + .validate = bch2_sb_members_v2_validate, + .to_text = bch2_sb_members_v2_to_text, +}; + +void bch2_sb_members_from_cpu(struct bch_fs *c) +{ + struct bch_sb_field_members_v2 *mi = bch2_sb_field_get(c->disk_sb.sb, members_v2); + + rcu_read_lock(); + for_each_member_device_rcu(c, ca, NULL) { + struct bch_member *m = __bch2_members_v2_get_mut(mi, ca->dev_idx); + + for (unsigned e = 0; e < BCH_MEMBER_ERROR_NR; e++) + m->errors[e] = cpu_to_le64(atomic64_read(&ca->errors[e])); + } + rcu_read_unlock(); +} + +void bch2_dev_io_errors_to_text(struct printbuf *out, struct bch_dev *ca) +{ + struct bch_fs *c = ca->fs; + struct bch_member m; + + mutex_lock(&ca->fs->sb_lock); + m = bch2_sb_member_get(c->disk_sb.sb, ca->dev_idx); + mutex_unlock(&ca->fs->sb_lock); + + printbuf_tabstop_push(out, 12); + + prt_str(out, "IO errors since filesystem creation"); + prt_newline(out); + + printbuf_indent_add(out, 2); + for (unsigned i = 0; i < BCH_MEMBER_ERROR_NR; i++) + prt_printf(out, "%s:\t%llu\n", bch2_member_error_strs[i], atomic64_read(&ca->errors[i])); + printbuf_indent_sub(out, 2); + + prt_str(out, "IO errors since "); + bch2_pr_time_units(out, (ktime_get_real_seconds() - le64_to_cpu(m.errors_reset_time)) * NSEC_PER_SEC); + prt_str(out, " ago"); + prt_newline(out); + + printbuf_indent_add(out, 2); + for (unsigned i = 0; i < BCH_MEMBER_ERROR_NR; i++) + prt_printf(out, "%s:\t%llu\n", bch2_member_error_strs[i], + atomic64_read(&ca->errors[i]) - le64_to_cpu(m.errors_at_reset[i])); + printbuf_indent_sub(out, 2); +} + +void bch2_dev_errors_reset(struct bch_dev *ca) +{ + struct bch_fs *c = ca->fs; + struct bch_member *m; + + mutex_lock(&c->sb_lock); + m = bch2_members_v2_get_mut(c->disk_sb.sb, ca->dev_idx); + for (unsigned i = 0; i < ARRAY_SIZE(m->errors_at_reset); i++) + m->errors_at_reset[i] = cpu_to_le64(atomic64_read(&ca->errors[i])); + m->errors_reset_time = cpu_to_le64(ktime_get_real_seconds()); + + bch2_write_super(c); + mutex_unlock(&c->sb_lock); +} + +/* + * Per member "range has btree nodes" bitmap: + * + * This is so that if we ever have to run the btree node scan to repair we don't + * have to scan full devices: + */ + +bool bch2_dev_btree_bitmap_marked(struct bch_fs *c, struct bkey_s_c k) +{ + bool ret = true; + rcu_read_lock(); + bkey_for_each_ptr(bch2_bkey_ptrs_c(k), ptr) { + struct bch_dev *ca = bch2_dev_rcu(c, ptr->dev); + if (!ca) + continue; + + if (!bch2_dev_btree_bitmap_marked_sectors(ca, ptr->offset, btree_sectors(c))) { + ret = false; + break; + } + } + rcu_read_unlock(); + return ret; +} + +static void __bch2_dev_btree_bitmap_mark(struct bch_sb_field_members_v2 *mi, unsigned dev, + u64 start, unsigned sectors) +{ + struct bch_member *m = __bch2_members_v2_get_mut(mi, dev); + u64 bitmap = le64_to_cpu(m->btree_allocated_bitmap); + + u64 end = start + sectors; + + int resize = ilog2(roundup_pow_of_two(end)) - (m->btree_bitmap_shift + 6); + if (resize > 0) { + u64 new_bitmap = 0; + + for (unsigned i = 0; i < 64; i++) + if (bitmap & BIT_ULL(i)) + new_bitmap |= BIT_ULL(i >> resize); + bitmap = new_bitmap; + m->btree_bitmap_shift += resize; + } + + BUG_ON(m->btree_bitmap_shift >= BCH_MI_BTREE_BITMAP_SHIFT_MAX); + BUG_ON(end > 64ULL << m->btree_bitmap_shift); + + for (unsigned bit = start >> m->btree_bitmap_shift; + (u64) bit << m->btree_bitmap_shift < end; + bit++) + bitmap |= BIT_ULL(bit); + + m->btree_allocated_bitmap = cpu_to_le64(bitmap); +} + +void bch2_dev_btree_bitmap_mark(struct bch_fs *c, struct bkey_s_c k) +{ + lockdep_assert_held(&c->sb_lock); + + struct bch_sb_field_members_v2 *mi = bch2_sb_field_get(c->disk_sb.sb, members_v2); + bkey_for_each_ptr(bch2_bkey_ptrs_c(k), ptr) { + if (!bch2_member_exists(c->disk_sb.sb, ptr->dev)) + continue; + + __bch2_dev_btree_bitmap_mark(mi, ptr->dev, ptr->offset, btree_sectors(c)); + } +} + +unsigned bch2_sb_nr_devices(const struct bch_sb *sb) +{ + unsigned nr = 0; + + for (unsigned i = 0; i < sb->nr_devices; i++) + nr += bch2_member_exists((struct bch_sb *) sb, i); + return nr; +} + +int bch2_sb_member_alloc(struct bch_fs *c) +{ + unsigned dev_idx = c->sb.nr_devices; + struct bch_sb_field_members_v2 *mi; + unsigned nr_devices; + unsigned u64s; + int best = -1; + u64 best_last_mount = 0; + + if (dev_idx < BCH_SB_MEMBERS_MAX) + goto have_slot; + + for (dev_idx = 0; dev_idx < BCH_SB_MEMBERS_MAX; dev_idx++) { + /* eventually BCH_SB_MEMBERS_MAX will be raised */ + if (dev_idx == BCH_SB_MEMBER_INVALID) + continue; + + struct bch_member m = bch2_sb_member_get(c->disk_sb.sb, dev_idx); + if (bch2_member_alive(&m)) + continue; + + u64 last_mount = le64_to_cpu(m.last_mount); + if (best < 0 || last_mount < best_last_mount) { + best = dev_idx; + best_last_mount = last_mount; + } + } + if (best >= 0) { + dev_idx = best; + goto have_slot; + } + + return -BCH_ERR_ENOSPC_sb_members; +have_slot: + nr_devices = max_t(unsigned, dev_idx + 1, c->sb.nr_devices); + + mi = bch2_sb_field_get(c->disk_sb.sb, members_v2); + u64s = DIV_ROUND_UP(sizeof(struct bch_sb_field_members_v2) + + le16_to_cpu(mi->member_bytes) * nr_devices, sizeof(u64)); + + mi = bch2_sb_field_resize(&c->disk_sb, members_v2, u64s); + if (!mi) + return -BCH_ERR_ENOSPC_sb_members; + + c->disk_sb.sb->nr_devices = nr_devices; + return dev_idx; +} |