--- /dev/null
+// SPDX-License-Identifier: GPL-2.0
+
+#include "bcachefs.h"
+#include "checksum.h"
+#include "counters.h"
+#include "disk_groups.h"
+#include "ec.h"
+#include "error.h"
+#include "journal.h"
+#include "journal_sb.h"
+#include "journal_seq_blacklist.h"
+#include "recovery.h"
+#include "replicas.h"
+#include "quota.h"
+#include "sb-clean.h"
+#include "sb-downgrade.h"
+#include "sb-errors.h"
+#include "sb-members.h"
+#include "super-io.h"
+#include "super.h"
+#include "trace.h"
+#include "vstructs.h"
+
+#include <linux/backing-dev.h>
+#include <linux/sort.h>
+
+static const struct blk_holder_ops bch2_sb_handle_bdev_ops = {
+};
+
+struct bch2_metadata_version {
+ u16 version;
+ const char *name;
+};
+
+static const struct bch2_metadata_version bch2_metadata_versions[] = {
+#define x(n, v) { \
+ .version = v, \
+ .name = #n, \
+},
+ BCH_METADATA_VERSIONS()
+#undef x
+};
+
+void bch2_version_to_text(struct printbuf *out, unsigned v)
+{
+ const char *str = "(unknown version)";
+
+ for (unsigned i = 0; i < ARRAY_SIZE(bch2_metadata_versions); i++)
+ if (bch2_metadata_versions[i].version == v) {
+ str = bch2_metadata_versions[i].name;
+ break;
+ }
+
+ prt_printf(out, "%u.%u: %s", BCH_VERSION_MAJOR(v), BCH_VERSION_MINOR(v), str);
+}
+
+unsigned bch2_latest_compatible_version(unsigned v)
+{
+ if (!BCH_VERSION_MAJOR(v))
+ return v;
+
+ for (unsigned i = 0; i < ARRAY_SIZE(bch2_metadata_versions); i++)
+ if (bch2_metadata_versions[i].version > v &&
+ BCH_VERSION_MAJOR(bch2_metadata_versions[i].version) ==
+ BCH_VERSION_MAJOR(v))
+ v = bch2_metadata_versions[i].version;
+
+ return v;
+}
+
+const char * const bch2_sb_fields[] = {
+#define x(name, nr) #name,
+ BCH_SB_FIELDS()
+#undef x
+ NULL
+};
+
+static int bch2_sb_field_validate(struct bch_sb *, struct bch_sb_field *,
+ struct printbuf *);
+
+struct bch_sb_field *bch2_sb_field_get_id(struct bch_sb *sb,
+ enum bch_sb_field_type type)
+{
+ /* XXX: need locking around superblock to access optional fields */
+
+ vstruct_for_each(sb, f)
+ if (le32_to_cpu(f->type) == type)
+ return f;
+ return NULL;
+}
+
+static struct bch_sb_field *__bch2_sb_field_resize(struct bch_sb_handle *sb,
+ struct bch_sb_field *f,
+ unsigned u64s)
+{
+ unsigned old_u64s = f ? le32_to_cpu(f->u64s) : 0;
+ unsigned sb_u64s = le32_to_cpu(sb->sb->u64s) + u64s - old_u64s;
+
+ BUG_ON(__vstruct_bytes(struct bch_sb, sb_u64s) > sb->buffer_size);
+
+ if (!f && !u64s) {
+ /* nothing to do: */
+ } else if (!f) {
+ f = vstruct_last(sb->sb);
+ memset(f, 0, sizeof(u64) * u64s);
+ f->u64s = cpu_to_le32(u64s);
+ f->type = 0;
+ } else {
+ void *src, *dst;
+
+ src = vstruct_end(f);
+
+ if (u64s) {
+ f->u64s = cpu_to_le32(u64s);
+ dst = vstruct_end(f);
+ } else {
+ dst = f;
+ }
+
+ memmove(dst, src, vstruct_end(sb->sb) - src);
+
+ if (dst > src)
+ memset(src, 0, dst - src);
+ }
+
+ sb->sb->u64s = cpu_to_le32(sb_u64s);
+
+ return u64s ? f : NULL;
+}
+
+void bch2_sb_field_delete(struct bch_sb_handle *sb,
+ enum bch_sb_field_type type)
+{
+ struct bch_sb_field *f = bch2_sb_field_get_id(sb->sb, type);
+
+ if (f)
+ __bch2_sb_field_resize(sb, f, 0);
+}
+
+/* Superblock realloc/free: */
+
+void bch2_free_super(struct bch_sb_handle *sb)
+{
+ kfree(sb->bio);
+ if (!IS_ERR_OR_NULL(sb->bdev))
+ blkdev_put(sb->bdev, sb->holder);
+ kfree(sb->holder);
+ kfree(sb->sb_name);
+
+ kfree(sb->sb);
+ memset(sb, 0, sizeof(*sb));
+}
+
+int bch2_sb_realloc(struct bch_sb_handle *sb, unsigned u64s)
+{
+ size_t new_bytes = __vstruct_bytes(struct bch_sb, u64s);
+ size_t new_buffer_size;
+ struct bch_sb *new_sb;
+ struct bio *bio;
+
+ if (sb->bdev)
+ new_bytes = max_t(size_t, new_bytes, bdev_logical_block_size(sb->bdev));
+
+ new_buffer_size = roundup_pow_of_two(new_bytes);
+
+ if (sb->sb && sb->buffer_size >= new_buffer_size)
+ return 0;
+
+ if (sb->sb && sb->have_layout) {
+ u64 max_bytes = 512 << sb->sb->layout.sb_max_size_bits;
+
+ if (new_bytes > max_bytes) {
+ struct printbuf buf = PRINTBUF;
+
+ prt_bdevname(&buf, sb->bdev);
+ prt_printf(&buf, ": superblock too big: want %zu but have %llu", new_bytes, max_bytes);
+ pr_err("%s", buf.buf);
+ printbuf_exit(&buf);
+ return -BCH_ERR_ENOSPC_sb;
+ }
+ }
+
+ if (sb->buffer_size >= new_buffer_size && sb->sb)
+ return 0;
+
+ if (dynamic_fault("bcachefs:add:super_realloc"))
+ return -BCH_ERR_ENOMEM_sb_realloc_injected;
+
+ new_sb = krealloc(sb->sb, new_buffer_size, GFP_NOFS|__GFP_ZERO);
+ if (!new_sb)
+ return -BCH_ERR_ENOMEM_sb_buf_realloc;
+
+ sb->sb = new_sb;
+
+ if (sb->have_bio) {
+ unsigned nr_bvecs = buf_pages(sb->sb, new_buffer_size);
+
+ bio = bio_kmalloc(nr_bvecs, GFP_KERNEL);
+ if (!bio)
+ return -BCH_ERR_ENOMEM_sb_bio_realloc;
+
+ bio_init(bio, NULL, bio->bi_inline_vecs, nr_bvecs, 0);
+
+ kfree(sb->bio);
+ sb->bio = bio;
+ }
+
+ sb->buffer_size = new_buffer_size;
+
+ return 0;
+}
+
+struct bch_sb_field *bch2_sb_field_resize_id(struct bch_sb_handle *sb,
+ enum bch_sb_field_type type,
+ unsigned u64s)
+{
+ struct bch_sb_field *f = bch2_sb_field_get_id(sb->sb, type);
+ ssize_t old_u64s = f ? le32_to_cpu(f->u64s) : 0;
+ ssize_t d = -old_u64s + u64s;
+
+ if (bch2_sb_realloc(sb, le32_to_cpu(sb->sb->u64s) + d))
+ return NULL;
+
+ if (sb->fs_sb) {
+ struct bch_fs *c = container_of(sb, struct bch_fs, disk_sb);
+
+ lockdep_assert_held(&c->sb_lock);
+
+ /* XXX: we're not checking that offline device have enough space */
+
+ for_each_online_member(c, ca) {
+ struct bch_sb_handle *dev_sb = &ca->disk_sb;
+
+ if (bch2_sb_realloc(dev_sb, le32_to_cpu(dev_sb->sb->u64s) + d)) {
+ percpu_ref_put(&ca->ref);
+ return NULL;
+ }
+ }
+ }
+
+ f = bch2_sb_field_get_id(sb->sb, type);
+ f = __bch2_sb_field_resize(sb, f, u64s);
+ if (f)
+ f->type = cpu_to_le32(type);
+ return f;
+}
+
+struct bch_sb_field *bch2_sb_field_get_minsize_id(struct bch_sb_handle *sb,
+ enum bch_sb_field_type type,
+ unsigned u64s)
+{
+ struct bch_sb_field *f = bch2_sb_field_get_id(sb->sb, type);
+
+ if (!f || le32_to_cpu(f->u64s) < u64s)
+ f = bch2_sb_field_resize_id(sb, type, u64s);
+ return f;
+}
+
+/* Superblock validate: */
+
+static int validate_sb_layout(struct bch_sb_layout *layout, struct printbuf *out)
+{
+ u64 offset, prev_offset, max_sectors;
+ unsigned i;
+
+ BUILD_BUG_ON(sizeof(struct bch_sb_layout) != 512);
+
+ if (!uuid_equal(&layout->magic, &BCACHE_MAGIC) &&
+ !uuid_equal(&layout->magic, &BCHFS_MAGIC)) {
+ prt_printf(out, "Not a bcachefs superblock layout");
+ return -BCH_ERR_invalid_sb_layout;
+ }
+
+ if (layout->layout_type != 0) {
+ prt_printf(out, "Invalid superblock layout type %u",
+ layout->layout_type);
+ return -BCH_ERR_invalid_sb_layout_type;
+ }
+
+ if (!layout->nr_superblocks) {
+ prt_printf(out, "Invalid superblock layout: no superblocks");
+ return -BCH_ERR_invalid_sb_layout_nr_superblocks;
+ }
+
+ if (layout->nr_superblocks > ARRAY_SIZE(layout->sb_offset)) {
+ prt_printf(out, "Invalid superblock layout: too many superblocks");
+ return -BCH_ERR_invalid_sb_layout_nr_superblocks;
+ }
+
+ max_sectors = 1 << layout->sb_max_size_bits;
+
+ prev_offset = le64_to_cpu(layout->sb_offset[0]);
+
+ for (i = 1; i < layout->nr_superblocks; i++) {
+ offset = le64_to_cpu(layout->sb_offset[i]);
+
+ if (offset < prev_offset + max_sectors) {
+ prt_printf(out, "Invalid superblock layout: superblocks overlap\n"
+ " (sb %u ends at %llu next starts at %llu",
+ i - 1, prev_offset + max_sectors, offset);
+ return -BCH_ERR_invalid_sb_layout_superblocks_overlap;
+ }
+ prev_offset = offset;
+ }
+
+ return 0;
+}
+
+static int bch2_sb_compatible(struct bch_sb *sb, struct printbuf *out)
+{
+ u16 version = le16_to_cpu(sb->version);
+ u16 version_min = le16_to_cpu(sb->version_min);
+
+ if (!bch2_version_compatible(version)) {
+ prt_str(out, "Unsupported superblock version ");
+ bch2_version_to_text(out, version);
+ prt_str(out, " (min ");
+ bch2_version_to_text(out, bcachefs_metadata_version_min);
+ prt_str(out, ", max ");
+ bch2_version_to_text(out, bcachefs_metadata_version_current);
+ prt_str(out, ")");
+ return -BCH_ERR_invalid_sb_version;
+ }
+
+ if (!bch2_version_compatible(version_min)) {
+ prt_str(out, "Unsupported superblock version_min ");
+ bch2_version_to_text(out, version_min);
+ prt_str(out, " (min ");
+ bch2_version_to_text(out, bcachefs_metadata_version_min);
+ prt_str(out, ", max ");
+ bch2_version_to_text(out, bcachefs_metadata_version_current);
+ prt_str(out, ")");
+ return -BCH_ERR_invalid_sb_version;
+ }
+
+ if (version_min > version) {
+ prt_str(out, "Bad minimum version ");
+ bch2_version_to_text(out, version_min);
+ prt_str(out, ", greater than version field ");
+ bch2_version_to_text(out, version);
+ return -BCH_ERR_invalid_sb_version;
+ }
+
+ return 0;
+}
+
+static int bch2_sb_validate(struct bch_sb_handle *disk_sb, struct printbuf *out,
+ int rw)
+{
+ struct bch_sb *sb = disk_sb->sb;
+ struct bch_sb_field_members_v1 *mi;
+ enum bch_opt_id opt_id;
+ u16 block_size;
+ int ret;
+
+ ret = bch2_sb_compatible(sb, out);
+ if (ret)
+ return ret;
+
+ if (sb->features[1] ||
+ (le64_to_cpu(sb->features[0]) & (~0ULL << BCH_FEATURE_NR))) {
+ prt_printf(out, "Filesystem has incompatible features");
+ return -BCH_ERR_invalid_sb_features;
+ }
+
+ block_size = le16_to_cpu(sb->block_size);
+
+ if (block_size > PAGE_SECTORS) {
+ prt_printf(out, "Block size too big (got %u, max %u)",
+ block_size, PAGE_SECTORS);
+ return -BCH_ERR_invalid_sb_block_size;
+ }
+
+ if (bch2_is_zero(sb->user_uuid.b, sizeof(sb->user_uuid))) {
+ prt_printf(out, "Bad user UUID (got zeroes)");
+ return -BCH_ERR_invalid_sb_uuid;
+ }
+
+ if (bch2_is_zero(sb->uuid.b, sizeof(sb->uuid))) {
+ prt_printf(out, "Bad internal UUID (got zeroes)");
+ return -BCH_ERR_invalid_sb_uuid;
+ }
+
+ if (!sb->nr_devices ||
+ sb->nr_devices > BCH_SB_MEMBERS_MAX) {
+ prt_printf(out, "Bad number of member devices %u (max %u)",
+ sb->nr_devices, BCH_SB_MEMBERS_MAX);
+ return -BCH_ERR_invalid_sb_too_many_members;
+ }
+
+ if (sb->dev_idx >= sb->nr_devices) {
+ prt_printf(out, "Bad dev_idx (got %u, nr_devices %u)",
+ sb->dev_idx, sb->nr_devices);
+ return -BCH_ERR_invalid_sb_dev_idx;
+ }
+
+ if (!sb->time_precision ||
+ le32_to_cpu(sb->time_precision) > NSEC_PER_SEC) {
+ prt_printf(out, "Invalid time precision: %u (min 1, max %lu)",
+ le32_to_cpu(sb->time_precision), NSEC_PER_SEC);
+ return -BCH_ERR_invalid_sb_time_precision;
+ }
+
+ if (rw == READ) {
+ /*
+ * Been seeing a bug where these are getting inexplicably
+ * zeroed, so we're now validating them, but we have to be
+ * careful not to preven people's filesystems from mounting:
+ */
+ if (!BCH_SB_JOURNAL_FLUSH_DELAY(sb))
+ SET_BCH_SB_JOURNAL_FLUSH_DELAY(sb, 1000);
+ if (!BCH_SB_JOURNAL_RECLAIM_DELAY(sb))
+ SET_BCH_SB_JOURNAL_RECLAIM_DELAY(sb, 1000);
+
+ if (!BCH_SB_VERSION_UPGRADE_COMPLETE(sb))
+ SET_BCH_SB_VERSION_UPGRADE_COMPLETE(sb, le16_to_cpu(sb->version));
+ }
+
+ for (opt_id = 0; opt_id < bch2_opts_nr; opt_id++) {
+ const struct bch_option *opt = bch2_opt_table + opt_id;
+
+ if (opt->get_sb != BCH2_NO_SB_OPT) {
+ u64 v = bch2_opt_from_sb(sb, opt_id);
+
+ prt_printf(out, "Invalid option ");
+ ret = bch2_opt_validate(opt, v, out);
+ if (ret)
+ return ret;
+
+ printbuf_reset(out);
+ }
+ }
+
+ /* validate layout */
+ ret = validate_sb_layout(&sb->layout, out);
+ if (ret)
+ return ret;
+
+ vstruct_for_each(sb, f) {
+ if (!f->u64s) {
+ prt_printf(out, "Invalid superblock: optional field with size 0 (type %u)",
+ le32_to_cpu(f->type));
+ return -BCH_ERR_invalid_sb_field_size;
+ }
+
+ if (vstruct_next(f) > vstruct_last(sb)) {
+ prt_printf(out, "Invalid superblock: optional field extends past end of superblock (type %u)",
+ le32_to_cpu(f->type));
+ return -BCH_ERR_invalid_sb_field_size;
+ }
+ }
+
+ /* members must be validated first: */
+ mi = bch2_sb_field_get(sb, members_v1);
+ if (!mi) {
+ prt_printf(out, "Invalid superblock: member info area missing");
+ return -BCH_ERR_invalid_sb_members_missing;
+ }
+
+ ret = bch2_sb_field_validate(sb, &mi->field, out);
+ if (ret)
+ return ret;
+
+ vstruct_for_each(sb, f) {
+ if (le32_to_cpu(f->type) == BCH_SB_FIELD_members_v1)
+ continue;
+
+ ret = bch2_sb_field_validate(sb, f, out);
+ if (ret)
+ return ret;
+ }
+
+ return 0;
+}
+
+/* device open: */
+
+static unsigned long le_ulong_to_cpu(unsigned long v)
+{
+ return sizeof(unsigned long) == 8
+ ? le64_to_cpu(v)
+ : le32_to_cpu(v);
+}
+
+static void le_bitvector_to_cpu(unsigned long *dst, unsigned long *src, unsigned nr)
+{
+ BUG_ON(nr & (BITS_PER_TYPE(long) - 1));
+
+ for (unsigned i = 0; i < BITS_TO_LONGS(nr); i++)
+ dst[i] = le_ulong_to_cpu(src[i]);
+}
+
+static void bch2_sb_update(struct bch_fs *c)
+{
+ struct bch_sb *src = c->disk_sb.sb;
+
+ lockdep_assert_held(&c->sb_lock);
+
+ c->sb.uuid = src->uuid;
+ c->sb.user_uuid = src->user_uuid;
+ c->sb.version = le16_to_cpu(src->version);
+ c->sb.version_min = le16_to_cpu(src->version_min);
+ c->sb.version_upgrade_complete = BCH_SB_VERSION_UPGRADE_COMPLETE(src);
+ c->sb.nr_devices = src->nr_devices;
+ c->sb.clean = BCH_SB_CLEAN(src);
+ c->sb.encryption_type = BCH_SB_ENCRYPTION_TYPE(src);
+
+ c->sb.nsec_per_time_unit = le32_to_cpu(src->time_precision);
+ c->sb.time_units_per_sec = NSEC_PER_SEC / c->sb.nsec_per_time_unit;
+
+ /* XXX this is wrong, we need a 96 or 128 bit integer type */
+ c->sb.time_base_lo = div_u64(le64_to_cpu(src->time_base_lo),
+ c->sb.nsec_per_time_unit);
+ c->sb.time_base_hi = le32_to_cpu(src->time_base_hi);
+
+ c->sb.features = le64_to_cpu(src->features[0]);
+ c->sb.compat = le64_to_cpu(src->compat[0]);
+
+ memset(c->sb.errors_silent, 0, sizeof(c->sb.errors_silent));
+
+ struct bch_sb_field_ext *ext = bch2_sb_field_get(src, ext);
+ if (ext)
+ le_bitvector_to_cpu(c->sb.errors_silent, (void *) ext->errors_silent,
+ sizeof(c->sb.errors_silent) * 8);
+
+ for_each_member_device(c, ca) {
+ struct bch_member m = bch2_sb_member_get(src, ca->dev_idx);
+ ca->mi = bch2_mi_to_cpu(&m);
+ }
+}
+
+static int __copy_super(struct bch_sb_handle *dst_handle, struct bch_sb *src)
+{
+ struct bch_sb_field *src_f, *dst_f;
+ struct bch_sb *dst = dst_handle->sb;
+ unsigned i;
+
+ dst->version = src->version;
+ dst->version_min = src->version_min;
+ dst->seq = src->seq;
+ dst->uuid = src->uuid;
+ dst->user_uuid = src->user_uuid;
+ memcpy(dst->label, src->label, sizeof(dst->label));
+
+ dst->block_size = src->block_size;
+ dst->nr_devices = src->nr_devices;
+
+ dst->time_base_lo = src->time_base_lo;
+ dst->time_base_hi = src->time_base_hi;
+ dst->time_precision = src->time_precision;
+ dst->write_time = src->write_time;
+
+ memcpy(dst->flags, src->flags, sizeof(dst->flags));
+ memcpy(dst->features, src->features, sizeof(dst->features));
+ memcpy(dst->compat, src->compat, sizeof(dst->compat));
+
+ for (i = 0; i < BCH_SB_FIELD_NR; i++) {
+ int d;
+
+ if ((1U << i) & BCH_SINGLE_DEVICE_SB_FIELDS)
+ continue;
+
+ src_f = bch2_sb_field_get_id(src, i);
+ dst_f = bch2_sb_field_get_id(dst, i);
+
+ d = (src_f ? le32_to_cpu(src_f->u64s) : 0) -
+ (dst_f ? le32_to_cpu(dst_f->u64s) : 0);
+ if (d > 0) {
+ int ret = bch2_sb_realloc(dst_handle,
+ le32_to_cpu(dst_handle->sb->u64s) + d);
+
+ if (ret)
+ return ret;
+
+ dst = dst_handle->sb;
+ dst_f = bch2_sb_field_get_id(dst, i);
+ }
+
+ dst_f = __bch2_sb_field_resize(dst_handle, dst_f,
+ src_f ? le32_to_cpu(src_f->u64s) : 0);
+
+ if (src_f)
+ memcpy(dst_f, src_f, vstruct_bytes(src_f));
+ }
+
+ return 0;
+}
+
+int bch2_sb_to_fs(struct bch_fs *c, struct bch_sb *src)
+{
+ int ret;
+
+ lockdep_assert_held(&c->sb_lock);
+
+ ret = bch2_sb_realloc(&c->disk_sb, 0) ?:
+ __copy_super(&c->disk_sb, src) ?:
+ bch2_sb_replicas_to_cpu_replicas(c) ?:
+ bch2_sb_disk_groups_to_cpu(c);
+ if (ret)
+ return ret;
+
+ bch2_sb_update(c);
+ return 0;
+}
+
+int bch2_sb_from_fs(struct bch_fs *c, struct bch_dev *ca)
+{
+ return __copy_super(&ca->disk_sb, c->disk_sb.sb);
+}
+
+/* read superblock: */
+
+static int read_one_super(struct bch_sb_handle *sb, u64 offset, struct printbuf *err)
+{
+ size_t bytes;
+ int ret;
+reread:
+ bio_reset(sb->bio, sb->bdev, REQ_OP_READ|REQ_SYNC|REQ_META);
+ sb->bio->bi_iter.bi_sector = offset;
+ bch2_bio_map(sb->bio, sb->sb, sb->buffer_size);
+
+ ret = submit_bio_wait(sb->bio);
+ if (ret) {
+ prt_printf(err, "IO error: %i", ret);
+ return ret;
+ }
+
+ if (!uuid_equal(&sb->sb->magic, &BCACHE_MAGIC) &&
+ !uuid_equal(&sb->sb->magic, &BCHFS_MAGIC)) {
+ prt_str(err, "Not a bcachefs superblock (got magic ");
+ pr_uuid(err, sb->sb->magic.b);
+ prt_str(err, ")");
+ return -BCH_ERR_invalid_sb_magic;
+ }
+
+ ret = bch2_sb_compatible(sb->sb, err);
+ if (ret)
+ return ret;
+
+ bytes = vstruct_bytes(sb->sb);
+
+ if (bytes > 512 << sb->sb->layout.sb_max_size_bits) {
+ prt_printf(err, "Invalid superblock: too big (got %zu bytes, layout max %lu)",
+ bytes, 512UL << sb->sb->layout.sb_max_size_bits);
+ return -BCH_ERR_invalid_sb_too_big;
+ }
+
+ if (bytes > sb->buffer_size) {
+ ret = bch2_sb_realloc(sb, le32_to_cpu(sb->sb->u64s));
+ if (ret)
+ return ret;
+ goto reread;
+ }
+
+ enum bch_csum_type csum_type = BCH_SB_CSUM_TYPE(sb->sb);
+ if (csum_type >= BCH_CSUM_NR) {
+ prt_printf(err, "unknown checksum type %llu", BCH_SB_CSUM_TYPE(sb->sb));
+ return -BCH_ERR_invalid_sb_csum_type;
+ }
+
+ /* XXX: verify MACs */
+ struct bch_csum csum = csum_vstruct(NULL, csum_type, null_nonce(), sb->sb);
+ if (bch2_crc_cmp(csum, sb->sb->csum)) {
+ bch2_csum_err_msg(err, csum_type, sb->sb->csum, csum);
+ return -BCH_ERR_invalid_sb_csum;
+ }
+
+ sb->seq = le64_to_cpu(sb->sb->seq);
+
+ return 0;
+}
+
+static int __bch2_read_super(const char *path, struct bch_opts *opts,
+ struct bch_sb_handle *sb, bool ignore_notbchfs_msg)
+{
+ u64 offset = opt_get(*opts, sb);
+ struct bch_sb_layout layout;
+ struct printbuf err = PRINTBUF;
+ struct printbuf err2 = PRINTBUF;
+ __le64 *i;
+ int ret;
+#ifndef __KERNEL__
+retry:
+#endif
+ memset(sb, 0, sizeof(*sb));
+ sb->mode = BLK_OPEN_READ;
+ sb->have_bio = true;
+ sb->holder = kmalloc(1, GFP_KERNEL);
+ if (!sb->holder)
+ return -ENOMEM;
+
+ sb->sb_name = kstrdup(path, GFP_KERNEL);
+ if (!sb->sb_name)
+ return -ENOMEM;
+
+#ifndef __KERNEL__
+ if (opt_get(*opts, direct_io) == false)
+ sb->mode |= BLK_OPEN_BUFFERED;
+#endif
+
+ if (!opt_get(*opts, noexcl))
+ sb->mode |= BLK_OPEN_EXCL;
+
+ if (!opt_get(*opts, nochanges))
+ sb->mode |= BLK_OPEN_WRITE;
+
+ sb->bdev = blkdev_get_by_path(path, sb->mode, sb->holder, &bch2_sb_handle_bdev_ops);
+ if (IS_ERR(sb->bdev) &&
+ PTR_ERR(sb->bdev) == -EACCES &&
+ opt_get(*opts, read_only)) {
+ sb->mode &= ~BLK_OPEN_WRITE;
+
+ sb->bdev = blkdev_get_by_path(path, sb->mode, sb->holder, &bch2_sb_handle_bdev_ops);
+ if (!IS_ERR(sb->bdev))
+ opt_set(*opts, nochanges, true);
+ }
+
+ if (IS_ERR(sb->bdev)) {
+ ret = PTR_ERR(sb->bdev);
+ goto out;
+ }
+
+ ret = bch2_sb_realloc(sb, 0);
+ if (ret) {
+ prt_printf(&err, "error allocating memory for superblock");
+ goto err;
+ }
+
+ if (bch2_fs_init_fault("read_super")) {
+ prt_printf(&err, "dynamic fault");
+ ret = -EFAULT;
+ goto err;
+ }
+
+ ret = read_one_super(sb, offset, &err);
+ if (!ret)
+ goto got_super;
+
+ if (opt_defined(*opts, sb))
+ goto err;
+
+ prt_printf(&err2, "bcachefs (%s): error reading default superblock: %s\n",
+ path, err.buf);
+ if (ret == -BCH_ERR_invalid_sb_magic && ignore_notbchfs_msg)
+ printk(KERN_INFO "%s", err2.buf);
+ else
+ printk(KERN_ERR "%s", err2.buf);
+
+ printbuf_exit(&err2);
+ printbuf_reset(&err);
+
+ /*
+ * Error reading primary superblock - read location of backup
+ * superblocks:
+ */
+ bio_reset(sb->bio, sb->bdev, REQ_OP_READ|REQ_SYNC|REQ_META);
+ sb->bio->bi_iter.bi_sector = BCH_SB_LAYOUT_SECTOR;
+ /*
+ * use sb buffer to read layout, since sb buffer is page aligned but
+ * layout won't be:
+ */
+ bch2_bio_map(sb->bio, sb->sb, sizeof(struct bch_sb_layout));
+
+ ret = submit_bio_wait(sb->bio);
+ if (ret) {
+ prt_printf(&err, "IO error: %i", ret);
+ goto err;
+ }
+
+ memcpy(&layout, sb->sb, sizeof(layout));
+ ret = validate_sb_layout(&layout, &err);
+ if (ret)
+ goto err;
+
+ for (i = layout.sb_offset;
+ i < layout.sb_offset + layout.nr_superblocks; i++) {
+ offset = le64_to_cpu(*i);
+
+ if (offset == opt_get(*opts, sb))
+ continue;
+
+ ret = read_one_super(sb, offset, &err);
+ if (!ret)
+ goto got_super;
+ }
+
+ goto err;
+
+got_super:
+ if (le16_to_cpu(sb->sb->block_size) << 9 <
+ bdev_logical_block_size(sb->bdev) &&
+ opt_get(*opts, direct_io)) {
+#ifndef __KERNEL__
+ opt_set(*opts, direct_io, false);
+ bch2_free_super(sb);
+ goto retry;
+#endif
+ prt_printf(&err, "block size (%u) smaller than device block size (%u)",
+ le16_to_cpu(sb->sb->block_size) << 9,
+ bdev_logical_block_size(sb->bdev));
+ ret = -BCH_ERR_block_size_too_small;
+ goto err;
+ }
+
+ ret = 0;
+ sb->have_layout = true;
+
+ ret = bch2_sb_validate(sb, &err, READ);
+ if (ret) {
+ printk(KERN_ERR "bcachefs (%s): error validating superblock: %s\n",
+ path, err.buf);
+ goto err_no_print;
+ }
+out:
+ printbuf_exit(&err);
+ return ret;
+err:
+ printk(KERN_ERR "bcachefs (%s): error reading superblock: %s\n",
+ path, err.buf);
+err_no_print:
+ bch2_free_super(sb);
+ goto out;
+}
+
+int bch2_read_super(const char *path, struct bch_opts *opts,
+ struct bch_sb_handle *sb)
+{
+ return __bch2_read_super(path, opts, sb, false);
+}
+
+/* provide a silenced version for mount.bcachefs */
+
+int bch2_read_super_silent(const char *path, struct bch_opts *opts,
+ struct bch_sb_handle *sb)
+{
+ return __bch2_read_super(path, opts, sb, true);
+}
+
+/* write superblock: */
+
+static void write_super_endio(struct bio *bio)
+{
+ struct bch_dev *ca = bio->bi_private;
+
+ /* XXX: return errors directly */
+
+ if (bch2_dev_io_err_on(bio->bi_status, ca,
+ bio_data_dir(bio)
+ ? BCH_MEMBER_ERROR_write
+ : BCH_MEMBER_ERROR_read,
+ "superblock %s error: %s",
+ bio_data_dir(bio) ? "write" : "read",
+ bch2_blk_status_to_str(bio->bi_status)))
+ ca->sb_write_error = 1;
+
+ closure_put(&ca->fs->sb_write);
+ percpu_ref_put(&ca->io_ref);
+}
+
+static void read_back_super(struct bch_fs *c, struct bch_dev *ca)
+{
+ struct bch_sb *sb = ca->disk_sb.sb;
+ struct bio *bio = ca->disk_sb.bio;
+
+ bio_reset(bio, ca->disk_sb.bdev, REQ_OP_READ|REQ_SYNC|REQ_META);
+ bio->bi_iter.bi_sector = le64_to_cpu(sb->layout.sb_offset[0]);
+ bio->bi_end_io = write_super_endio;
+ bio->bi_private = ca;
+ bch2_bio_map(bio, ca->sb_read_scratch, PAGE_SIZE);
+
+ this_cpu_add(ca->io_done->sectors[READ][BCH_DATA_sb],
+ bio_sectors(bio));
+
+ percpu_ref_get(&ca->io_ref);
+ closure_bio_submit(bio, &c->sb_write);
+}
+
+static void write_one_super(struct bch_fs *c, struct bch_dev *ca, unsigned idx)
+{
+ struct bch_sb *sb = ca->disk_sb.sb;
+ struct bio *bio = ca->disk_sb.bio;
+
+ sb->offset = sb->layout.sb_offset[idx];
+
+ SET_BCH_SB_CSUM_TYPE(sb, bch2_csum_opt_to_type(c->opts.metadata_checksum, false));
+ sb->csum = csum_vstruct(c, BCH_SB_CSUM_TYPE(sb),
+ null_nonce(), sb);
+
+ bio_reset(bio, ca->disk_sb.bdev, REQ_OP_WRITE|REQ_SYNC|REQ_META);
+ bio->bi_iter.bi_sector = le64_to_cpu(sb->offset);
+ bio->bi_end_io = write_super_endio;
+ bio->bi_private = ca;
+ bch2_bio_map(bio, sb,
+ roundup((size_t) vstruct_bytes(sb),
+ bdev_logical_block_size(ca->disk_sb.bdev)));
+
+ this_cpu_add(ca->io_done->sectors[WRITE][BCH_DATA_sb],
+ bio_sectors(bio));
+
+ percpu_ref_get(&ca->io_ref);
+ closure_bio_submit(bio, &c->sb_write);
+}
+
+int bch2_write_super(struct bch_fs *c)
+{
+ struct closure *cl = &c->sb_write;
+ struct printbuf err = PRINTBUF;
+ unsigned sb = 0, nr_wrote;
+ struct bch_devs_mask sb_written;
+ bool wrote, can_mount_without_written, can_mount_with_written;
+ unsigned degraded_flags = BCH_FORCE_IF_DEGRADED;
+ int ret = 0;
+
+ trace_and_count(c, write_super, c, _RET_IP_);
+
+ if (c->opts.very_degraded)
+ degraded_flags |= BCH_FORCE_IF_LOST;
+
+ lockdep_assert_held(&c->sb_lock);
+
+ closure_init_stack(cl);
+ memset(&sb_written, 0, sizeof(sb_written));
+
+ /* Make sure we're using the new magic numbers: */
+ c->disk_sb.sb->magic = BCHFS_MAGIC;
+ c->disk_sb.sb->layout.magic = BCHFS_MAGIC;
+
+ le64_add_cpu(&c->disk_sb.sb->seq, 1);
+
+ struct bch_sb_field_members_v2 *mi = bch2_sb_field_get(c->disk_sb.sb, members_v2);
+ for_each_online_member(c, ca)
+ __bch2_members_v2_get_mut(mi, ca->dev_idx)->seq = c->disk_sb.sb->seq;
+ c->disk_sb.sb->write_time = cpu_to_le64(ktime_get_real_seconds());
+
+ if (test_bit(BCH_FS_error, &c->flags))
+ SET_BCH_SB_HAS_ERRORS(c->disk_sb.sb, 1);
+ if (test_bit(BCH_FS_topology_error, &c->flags))
+ SET_BCH_SB_HAS_TOPOLOGY_ERRORS(c->disk_sb.sb, 1);
+
+ SET_BCH_SB_BIG_ENDIAN(c->disk_sb.sb, CPU_BIG_ENDIAN);
+
+ bch2_sb_counters_from_cpu(c);
+ bch2_sb_members_from_cpu(c);
+ bch2_sb_members_cpy_v2_v1(&c->disk_sb);
+ bch2_sb_errors_from_cpu(c);
+ bch2_sb_downgrade_update(c);
+
+ for_each_online_member(c, ca)
+ bch2_sb_from_fs(c, ca);
+
+ for_each_online_member(c, ca) {
+ printbuf_reset(&err);
+
+ ret = bch2_sb_validate(&ca->disk_sb, &err, WRITE);
+ if (ret) {
+ bch2_fs_inconsistent(c, "sb invalid before write: %s", err.buf);
+ percpu_ref_put(&ca->io_ref);
+ goto out;
+ }
+ }
+
+ if (c->opts.nochanges)
+ goto out;
+
+ /*
+ * Defer writing the superblock until filesystem initialization is
+ * complete - don't write out a partly initialized superblock:
+ */
+ if (!BCH_SB_INITIALIZED(c->disk_sb.sb))
+ goto out;
+
+ if (le16_to_cpu(c->disk_sb.sb->version) > bcachefs_metadata_version_current) {
+ struct printbuf buf = PRINTBUF;
+ prt_printf(&buf, "attempting to write superblock that wasn't version downgraded (");
+ bch2_version_to_text(&buf, le16_to_cpu(c->disk_sb.sb->version));
+ prt_str(&buf, " > ");
+ bch2_version_to_text(&buf, bcachefs_metadata_version_current);
+ prt_str(&buf, ")");
+ bch2_fs_fatal_error(c, "%s", buf.buf);
+ printbuf_exit(&buf);
+ return -BCH_ERR_sb_not_downgraded;
+ }
+
+ for_each_online_member(c, ca) {
+ __set_bit(ca->dev_idx, sb_written.d);
+ ca->sb_write_error = 0;
+ }
+
+ for_each_online_member(c, ca)
+ read_back_super(c, ca);
+ closure_sync(cl);
+
+ for_each_online_member(c, ca) {
+ if (ca->sb_write_error)
+ continue;
+
+ if (le64_to_cpu(ca->sb_read_scratch->seq) < ca->disk_sb.seq) {
+ bch2_fs_fatal_error(c,
+ "Superblock write was silently dropped! (seq %llu expected %llu)",
+ le64_to_cpu(ca->sb_read_scratch->seq),
+ ca->disk_sb.seq);
+ percpu_ref_put(&ca->io_ref);
+ ret = -BCH_ERR_erofs_sb_err;
+ goto out;
+ }
+
+ if (le64_to_cpu(ca->sb_read_scratch->seq) > ca->disk_sb.seq) {
+ bch2_fs_fatal_error(c,
+ "Superblock modified by another process (seq %llu expected %llu)",
+ le64_to_cpu(ca->sb_read_scratch->seq),
+ ca->disk_sb.seq);
+ percpu_ref_put(&ca->io_ref);
+ ret = -BCH_ERR_erofs_sb_err;
+ goto out;
+ }
+ }
+
+ do {
+ wrote = false;
+ for_each_online_member(c, ca)
+ if (!ca->sb_write_error &&
+ sb < ca->disk_sb.sb->layout.nr_superblocks) {
+ write_one_super(c, ca, sb);
+ wrote = true;
+ }
+ closure_sync(cl);
+ sb++;
+ } while (wrote);
+
+ for_each_online_member(c, ca) {
+ if (ca->sb_write_error)
+ __clear_bit(ca->dev_idx, sb_written.d);
+ else
+ ca->disk_sb.seq = le64_to_cpu(ca->disk_sb.sb->seq);
+ }
+
+ nr_wrote = dev_mask_nr(&sb_written);
+
+ can_mount_with_written =
+ bch2_have_enough_devs(c, sb_written, degraded_flags, false);
+
+ for (unsigned i = 0; i < ARRAY_SIZE(sb_written.d); i++)
+ sb_written.d[i] = ~sb_written.d[i];
+
+ can_mount_without_written =
+ bch2_have_enough_devs(c, sb_written, degraded_flags, false);
+
+ /*
+ * If we would be able to mount _without_ the devices we successfully
+ * wrote superblocks to, we weren't able to write to enough devices:
+ *
+ * Exception: if we can mount without the successes because we haven't
+ * written anything (new filesystem), we continue if we'd be able to
+ * mount with the devices we did successfully write to:
+ */
+ if (bch2_fs_fatal_err_on(!nr_wrote ||
+ !can_mount_with_written ||
+ (can_mount_without_written &&
+ !can_mount_with_written), c,
+ "Unable to write superblock to sufficient devices (from %ps)",
+ (void *) _RET_IP_))
+ ret = -1;
+out:
+ /* Make new options visible after they're persistent: */
+ bch2_sb_update(c);
+ printbuf_exit(&err);
+ return ret;
+}
+
+void __bch2_check_set_feature(struct bch_fs *c, unsigned feat)
+{
+ mutex_lock(&c->sb_lock);
+ if (!(c->sb.features & (1ULL << feat))) {
+ c->disk_sb.sb->features[0] |= cpu_to_le64(1ULL << feat);
+
+ bch2_write_super(c);
+ }
+ mutex_unlock(&c->sb_lock);
+}
+
+/* Downgrade if superblock is at a higher version than currently supported: */
+bool bch2_check_version_downgrade(struct bch_fs *c)
+{
+ bool ret = bcachefs_metadata_version_current < c->sb.version;
+
+ lockdep_assert_held(&c->sb_lock);
+
+ /*
+ * Downgrade, if superblock is at a higher version than currently
+ * supported:
+ *
+ * c->sb will be checked before we write the superblock, so update it as
+ * well:
+ */
+ if (BCH_SB_VERSION_UPGRADE_COMPLETE(c->disk_sb.sb) > bcachefs_metadata_version_current) {
+ SET_BCH_SB_VERSION_UPGRADE_COMPLETE(c->disk_sb.sb, bcachefs_metadata_version_current);
+ c->sb.version_upgrade_complete = bcachefs_metadata_version_current;
+ }
+ if (c->sb.version > bcachefs_metadata_version_current) {
+ c->disk_sb.sb->version = cpu_to_le16(bcachefs_metadata_version_current);
+ c->sb.version = bcachefs_metadata_version_current;
+ }
+ if (c->sb.version_min > bcachefs_metadata_version_current) {
+ c->disk_sb.sb->version_min = cpu_to_le16(bcachefs_metadata_version_current);
+ c->sb.version_min = bcachefs_metadata_version_current;
+ }
+ c->disk_sb.sb->compat[0] &= cpu_to_le64((1ULL << BCH_COMPAT_NR) - 1);
+ return ret;
+}
+
+void bch2_sb_upgrade(struct bch_fs *c, unsigned new_version)
+{
+ lockdep_assert_held(&c->sb_lock);
+
+ if (BCH_VERSION_MAJOR(new_version) >
+ BCH_VERSION_MAJOR(le16_to_cpu(c->disk_sb.sb->version)))
+ bch2_sb_field_resize(&c->disk_sb, downgrade, 0);
+
+ c->disk_sb.sb->version = cpu_to_le16(new_version);
+ c->disk_sb.sb->features[0] |= cpu_to_le64(BCH_SB_FEATURES_ALL);
+}
+
+static int bch2_sb_ext_validate(struct bch_sb *sb, struct bch_sb_field *f,
+ struct printbuf *err)
+{
+ if (vstruct_bytes(f) < 88) {
+ prt_printf(err, "field too small (%zu < %u)", vstruct_bytes(f), 88);
+ return -BCH_ERR_invalid_sb_ext;
+ }
+
+ return 0;
+}
+
+static void bch2_sb_ext_to_text(struct printbuf *out, struct bch_sb *sb,
+ struct bch_sb_field *f)
+{
+ struct bch_sb_field_ext *e = field_to_type(f, ext);
+
+ prt_printf(out, "Recovery passes required:");
+ prt_tab(out);
+ prt_bitflags(out, bch2_recovery_passes,
+ bch2_recovery_passes_from_stable(le64_to_cpu(e->recovery_passes_required[0])));
+ prt_newline(out);
+
+ unsigned long *errors_silent = kmalloc(sizeof(e->errors_silent), GFP_KERNEL);
+ if (errors_silent) {
+ le_bitvector_to_cpu(errors_silent, (void *) e->errors_silent, sizeof(e->errors_silent) * 8);
+
+ prt_printf(out, "Errors to silently fix:");
+ prt_tab(out);
+ prt_bitflags_vector(out, bch2_sb_error_strs, errors_silent, sizeof(e->errors_silent) * 8);
+ prt_newline(out);
+
+ kfree(errors_silent);
+ }
+}
+
+static const struct bch_sb_field_ops bch_sb_field_ops_ext = {
+ .validate = bch2_sb_ext_validate,
+ .to_text = bch2_sb_ext_to_text,
+};
+
+static const struct bch_sb_field_ops *bch2_sb_field_ops[] = {
+#define x(f, nr) \
+ [BCH_SB_FIELD_##f] = &bch_sb_field_ops_##f,
+ BCH_SB_FIELDS()
+#undef x
+};
+
+static const struct bch_sb_field_ops bch2_sb_field_null_ops;
+
+static const struct bch_sb_field_ops *bch2_sb_field_type_ops(unsigned type)
+{
+ return likely(type < ARRAY_SIZE(bch2_sb_field_ops))
+ ? bch2_sb_field_ops[type]
+ : &bch2_sb_field_null_ops;
+}
+
+static int bch2_sb_field_validate(struct bch_sb *sb, struct bch_sb_field *f,
+ struct printbuf *err)
+{
+ unsigned type = le32_to_cpu(f->type);
+ struct printbuf field_err = PRINTBUF;
+ const struct bch_sb_field_ops *ops = bch2_sb_field_type_ops(type);
+ int ret;
+
+ ret = ops->validate ? ops->validate(sb, f, &field_err) : 0;
+ if (ret) {
+ prt_printf(err, "Invalid superblock section %s: %s",
+ bch2_sb_fields[type], field_err.buf);
+ prt_newline(err);
+ bch2_sb_field_to_text(err, sb, f);
+ }
+
+ printbuf_exit(&field_err);
+ return ret;
+}
+
+void __bch2_sb_field_to_text(struct printbuf *out, struct bch_sb *sb,
+ struct bch_sb_field *f)
+{
+ unsigned type = le32_to_cpu(f->type);
+ const struct bch_sb_field_ops *ops = bch2_sb_field_type_ops(type);
+
+ if (!out->nr_tabstops)
+ printbuf_tabstop_push(out, 32);
+
+ if (ops->to_text)
+ ops->to_text(out, sb, f);
+}
+
+void bch2_sb_field_to_text(struct printbuf *out, struct bch_sb *sb,
+ struct bch_sb_field *f)
+{
+ unsigned type = le32_to_cpu(f->type);
+
+ if (type < BCH_SB_FIELD_NR)
+ prt_printf(out, "%s", bch2_sb_fields[type]);
+ else
+ prt_printf(out, "(unknown field %u)", type);
+
+ prt_printf(out, " (size %zu):", vstruct_bytes(f));
+ prt_newline(out);
+
+ __bch2_sb_field_to_text(out, sb, f);
+}
+
+void bch2_sb_layout_to_text(struct printbuf *out, struct bch_sb_layout *l)
+{
+ unsigned i;
+
+ prt_printf(out, "Type: %u", l->layout_type);
+ prt_newline(out);
+
+ prt_str(out, "Superblock max size: ");
+ prt_units_u64(out, 512 << l->sb_max_size_bits);
+ prt_newline(out);
+
+ prt_printf(out, "Nr superblocks: %u", l->nr_superblocks);
+ prt_newline(out);
+
+ prt_str(out, "Offsets: ");
+ for (i = 0; i < l->nr_superblocks; i++) {
+ if (i)
+ prt_str(out, ", ");
+ prt_printf(out, "%llu", le64_to_cpu(l->sb_offset[i]));
+ }
+ prt_newline(out);
+}
+
+void bch2_sb_to_text(struct printbuf *out, struct bch_sb *sb,
+ bool print_layout, unsigned fields)
+{
+ u64 fields_have = 0;
+ unsigned nr_devices = 0;
+
+ if (!out->nr_tabstops)
+ printbuf_tabstop_push(out, 44);
+
+ for (int i = 0; i < sb->nr_devices; i++)
+ nr_devices += bch2_dev_exists(sb, i);
+
+ prt_printf(out, "External UUID:");
+ prt_tab(out);
+ pr_uuid(out, sb->user_uuid.b);
+ prt_newline(out);
+
+ prt_printf(out, "Internal UUID:");
+ prt_tab(out);
+ pr_uuid(out, sb->uuid.b);
+ prt_newline(out);
+
+ prt_printf(out, "Magic number:");
+ prt_tab(out);
+ pr_uuid(out, sb->magic.b);
+ prt_newline(out);
+
+ prt_str(out, "Device index:");
+ prt_tab(out);
+ prt_printf(out, "%u", sb->dev_idx);
+ prt_newline(out);
+
+ prt_str(out, "Label:");
+ prt_tab(out);
+ prt_printf(out, "%.*s", (int) sizeof(sb->label), sb->label);
+ prt_newline(out);
+
+ prt_str(out, "Version:");
+ prt_tab(out);
+ bch2_version_to_text(out, le16_to_cpu(sb->version));
+ prt_newline(out);
+
+ prt_str(out, "Version upgrade complete:");
+ prt_tab(out);
+ bch2_version_to_text(out, BCH_SB_VERSION_UPGRADE_COMPLETE(sb));
+ prt_newline(out);
+
+ prt_printf(out, "Oldest version on disk:");
+ prt_tab(out);
+ bch2_version_to_text(out, le16_to_cpu(sb->version_min));
+ prt_newline(out);
+
+ prt_printf(out, "Created:");
+ prt_tab(out);
+ if (sb->time_base_lo)
+ bch2_prt_datetime(out, div_u64(le64_to_cpu(sb->time_base_lo), NSEC_PER_SEC));
+ else
+ prt_printf(out, "(not set)");
+ prt_newline(out);
+
+ prt_printf(out, "Sequence number:");
+ prt_tab(out);
+ prt_printf(out, "%llu", le64_to_cpu(sb->seq));
+ prt_newline(out);
+
+ prt_printf(out, "Time of last write:");
+ prt_tab(out);
+ bch2_prt_datetime(out, le64_to_cpu(sb->write_time));
+ prt_newline(out);
+
+ prt_printf(out, "Superblock size:");
+ prt_tab(out);
+ prt_printf(out, "%zu", vstruct_bytes(sb));
+ prt_newline(out);
+
+ prt_printf(out, "Clean:");
+ prt_tab(out);
+ prt_printf(out, "%llu", BCH_SB_CLEAN(sb));
+ prt_newline(out);
+
+ prt_printf(out, "Devices:");
+ prt_tab(out);
+ prt_printf(out, "%u", nr_devices);
+ prt_newline(out);
+
+ prt_printf(out, "Sections:");
+ vstruct_for_each(sb, f)
+ fields_have |= 1 << le32_to_cpu(f->type);
+ prt_tab(out);
+ prt_bitflags(out, bch2_sb_fields, fields_have);
+ prt_newline(out);
+
+ prt_printf(out, "Features:");
+ prt_tab(out);
+ prt_bitflags(out, bch2_sb_features, le64_to_cpu(sb->features[0]));
+ prt_newline(out);
+
+ prt_printf(out, "Compat features:");
+ prt_tab(out);
+ prt_bitflags(out, bch2_sb_compat, le64_to_cpu(sb->compat[0]));
+ prt_newline(out);
+
+ prt_newline(out);
+ prt_printf(out, "Options:");
+ prt_newline(out);
+ printbuf_indent_add(out, 2);
+ {
+ enum bch_opt_id id;
+
+ for (id = 0; id < bch2_opts_nr; id++) {
+ const struct bch_option *opt = bch2_opt_table + id;
+
+ if (opt->get_sb != BCH2_NO_SB_OPT) {
+ u64 v = bch2_opt_from_sb(sb, id);
+
+ prt_printf(out, "%s:", opt->attr.name);
+ prt_tab(out);
+ bch2_opt_to_text(out, NULL, sb, opt, v,
+ OPT_HUMAN_READABLE|OPT_SHOW_FULL_LIST);
+ prt_newline(out);
+ }
+ }
+ }
+
+ printbuf_indent_sub(out, 2);
+
+ if (print_layout) {
+ prt_newline(out);
+ prt_printf(out, "layout:");
+ prt_newline(out);
+ printbuf_indent_add(out, 2);
+ bch2_sb_layout_to_text(out, &sb->layout);
+ printbuf_indent_sub(out, 2);
+ }
+
+ vstruct_for_each(sb, f)
+ if (fields & (1 << le32_to_cpu(f->type))) {
+ prt_newline(out);
+ bch2_sb_field_to_text(out, sb, f);
+ }
+}
projects / bcachefs-tools-debian / blobdiff