diff options
Diffstat (limited to 'fs/bcachefs/sb-members.c')
| -rw-r--r-- | fs/bcachefs/sb-members.c | 339 |
1 files changed, 339 insertions, 0 deletions
diff --git a/fs/bcachefs/sb-members.c b/fs/bcachefs/sb-members.c new file mode 100644 index 000000000000..6dd85bb996fe --- /dev/null +++ b/fs/bcachefs/sb-members.c @@ -0,0 +1,339 @@ +// SPDX-License-Identifier: GPL-2.0 + +#include "bcachefs.h" +#include "disk_groups.h" +#include "opts.h" +#include "replicas.h" +#include "sb-members.h" +#include "super-io.h" + +/* Code for bch_sb_field_members_v1: */ + +static struct bch_member *members_v2_get_mut(struct bch_sb_field_members_v2 *mi, int i) +{ + return (void *) mi->_members + (i * le16_to_cpu(mi->member_bytes)); +} + +struct bch_member *bch2_members_v2_get_mut(struct bch_sb *sb, int i) +{ + return 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 = 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, sizeof(struct bch_member), 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, 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_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 bch_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), 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) > LONG_MAX) { + prt_printf(err, "device %u: too many buckets (got %llu, max %lu)", + i, le64_to_cpu(m.nbuckets), LONG_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; + } + + 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; + + + prt_printf(out, "Device:"); + prt_tab(out); + prt_printf(out, "%u", i); + prt_newline(out); + + printbuf_indent_add(out, 2); + + prt_printf(out, "UUID:"); + prt_tab(out); + pr_uuid(out, m.uuid.b); + prt_newline(out); + + prt_printf(out, "Size:"); + prt_tab(out); + prt_units_u64(out, device_size << 9); + prt_newline(out); + + for (unsigned i = 0; i < BCH_IOPS_NR; i++) { + prt_printf(out, "%s iops:", bch2_iops_measurements[i]); + prt_tab(out); + prt_printf(out, "%u", le32_to_cpu(m.iops[i])); + prt_newline(out); + } + + prt_printf(out, "Bucket size:"); + prt_tab(out); + prt_units_u64(out, bucket_size << 9); + prt_newline(out); + + prt_printf(out, "First bucket:"); + prt_tab(out); + prt_printf(out, "%u", le16_to_cpu(m.first_bucket)); + prt_newline(out); + + prt_printf(out, "Buckets:"); + prt_tab(out); + prt_printf(out, "%llu", le64_to_cpu(m.nbuckets)); + prt_newline(out); + + prt_printf(out, "Last mount:"); + prt_tab(out); + if (m.last_mount) + pr_time(out, le64_to_cpu(m.last_mount)); + else + prt_printf(out, "(never)"); + prt_newline(out); + + prt_printf(out, "State:"); + prt_tab(out); + prt_printf(out, "%s", + BCH_MEMBER_STATE(&m) < BCH_MEMBER_STATE_NR + ? bch2_member_states[BCH_MEMBER_STATE(&m)] + : "unknown"); + prt_newline(out); + + prt_printf(out, "Label:"); + prt_tab(out); + 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, "Data allowed:"); + prt_tab(out); + 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:"); + prt_tab(out); + if (data_have) + prt_bitflags(out, bch2_data_types, data_have); + else + prt_printf(out, "(none)"); + prt_newline(out); + + prt_printf(out, "Discard:"); + prt_tab(out); + prt_printf(out, "%llu", BCH_MEMBER_DISCARD(&m)); + prt_newline(out); + + prt_printf(out, "Freespace initialized:"); + prt_tab(out); + prt_printf(out, "%llu", BCH_MEMBER_FREESPACE_INITIALIZED(&m)); + prt_newline(out); + + printbuf_indent_sub(out, 2); +} + +static int bch2_sb_members_v1_validate(struct bch_sb *sb, + struct bch_sb_field *f, + 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++) { + struct bch_member m = members_v1_get(mi, i); + member_to_text(out, m, 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++) { + struct bch_member m = members_v2_get(mi, i); + member_to_text(out, m, gi, sb, i); + } +} + +static int bch2_sb_members_v2_validate(struct bch_sb *sb, + struct bch_sb_field *f, + struct printbuf *err) +{ + struct bch_sb_field_members_v2 *mi = field_to_type(f, members_v2); + size_t mi_bytes = (void *) 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, +}; |