diff options
Diffstat (limited to 'fs/bcachefs/journal_io.c')
| -rw-r--r-- | fs/bcachefs/journal_io.c | 2242 |
1 files changed, 0 insertions, 2242 deletions
diff --git a/fs/bcachefs/journal_io.c b/fs/bcachefs/journal_io.c deleted file mode 100644 index 29bea8e0e495..000000000000 --- a/fs/bcachefs/journal_io.c +++ /dev/null @@ -1,2242 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0 -#include "bcachefs.h" -#include "alloc_background.h" -#include "alloc_foreground.h" -#include "btree_io.h" -#include "btree_update_interior.h" -#include "btree_write_buffer.h" -#include "buckets.h" -#include "checksum.h" -#include "disk_groups.h" -#include "error.h" -#include "journal.h" -#include "journal_io.h" -#include "journal_reclaim.h" -#include "journal_seq_blacklist.h" -#include "replicas.h" -#include "sb-clean.h" -#include "trace.h" - -#include <linux/ioprio.h> -#include <linux/string_choices.h> -#include <linux/sched/sysctl.h> - -void bch2_journal_pos_from_member_info_set(struct bch_fs *c) -{ - lockdep_assert_held(&c->sb_lock); - - for_each_member_device(c, ca) { - struct bch_member *m = bch2_members_v2_get_mut(c->disk_sb.sb, ca->dev_idx); - - m->last_journal_bucket = cpu_to_le32(ca->journal.cur_idx); - m->last_journal_bucket_offset = cpu_to_le32(ca->mi.bucket_size - ca->journal.sectors_free); - } -} - -void bch2_journal_pos_from_member_info_resume(struct bch_fs *c) -{ - mutex_lock(&c->sb_lock); - for_each_member_device(c, ca) { - struct bch_member m = bch2_sb_member_get(c->disk_sb.sb, ca->dev_idx); - - unsigned idx = le32_to_cpu(m.last_journal_bucket); - if (idx < ca->journal.nr) - ca->journal.cur_idx = idx; - unsigned offset = le32_to_cpu(m.last_journal_bucket_offset); - if (offset <= ca->mi.bucket_size) - ca->journal.sectors_free = ca->mi.bucket_size - offset; - } - mutex_unlock(&c->sb_lock); -} - -static void bch2_journal_ptr_to_text(struct printbuf *out, struct bch_fs *c, struct journal_ptr *p) -{ - struct bch_dev *ca = bch2_dev_tryget_noerror(c, p->dev); - prt_printf(out, "%s %u:%u:%u (sector %llu)", - ca ? ca->name : "(invalid dev)", - p->dev, p->bucket, p->bucket_offset, p->sector); - bch2_dev_put(ca); -} - -void bch2_journal_ptrs_to_text(struct printbuf *out, struct bch_fs *c, struct journal_replay *j) -{ - darray_for_each(j->ptrs, i) { - if (i != j->ptrs.data) - prt_printf(out, " "); - bch2_journal_ptr_to_text(out, c, i); - } -} - -static void bch2_journal_datetime_to_text(struct printbuf *out, struct jset *j) -{ - for_each_jset_entry_type(entry, j, BCH_JSET_ENTRY_datetime) { - struct jset_entry_datetime *datetime = - container_of(entry, struct jset_entry_datetime, entry); - bch2_prt_datetime(out, le64_to_cpu(datetime->seconds)); - break; - } -} - -static void bch2_journal_replay_to_text(struct printbuf *out, struct bch_fs *c, - struct journal_replay *j) -{ - prt_printf(out, "seq %llu ", le64_to_cpu(j->j.seq)); - bch2_journal_datetime_to_text(out, &j->j); - prt_char(out, ' '); - bch2_journal_ptrs_to_text(out, c, j); -} - -static struct nonce journal_nonce(const struct jset *jset) -{ - return (struct nonce) {{ - [0] = 0, - [1] = ((__le32 *) &jset->seq)[0], - [2] = ((__le32 *) &jset->seq)[1], - [3] = BCH_NONCE_JOURNAL, - }}; -} - -static bool jset_csum_good(struct bch_fs *c, struct jset *j, struct bch_csum *csum) -{ - if (!bch2_checksum_type_valid(c, JSET_CSUM_TYPE(j))) { - *csum = (struct bch_csum) {}; - return false; - } - - *csum = csum_vstruct(c, JSET_CSUM_TYPE(j), journal_nonce(j), j); - return !bch2_crc_cmp(j->csum, *csum); -} - -static inline u32 journal_entry_radix_idx(struct bch_fs *c, u64 seq) -{ - return (seq - c->journal_entries_base_seq) & (~0U >> 1); -} - -static void __journal_replay_free(struct bch_fs *c, - struct journal_replay *i) -{ - struct journal_replay **p = - genradix_ptr(&c->journal_entries, - journal_entry_radix_idx(c, le64_to_cpu(i->j.seq))); - - BUG_ON(*p != i); - *p = NULL; - kvfree(i); -} - -static void journal_replay_free(struct bch_fs *c, struct journal_replay *i, bool blacklisted) -{ - if (blacklisted) - i->ignore_blacklisted = true; - else - i->ignore_not_dirty = true; - - if (!c->opts.read_entire_journal) - __journal_replay_free(c, i); -} - -struct journal_list { - struct closure cl; - u64 last_seq; - struct mutex lock; - int ret; -}; - -#define JOURNAL_ENTRY_ADD_OK 0 -#define JOURNAL_ENTRY_ADD_OUT_OF_RANGE 5 - -/* - * Given a journal entry we just read, add it to the list of journal entries to - * be replayed: - */ -static int journal_entry_add(struct bch_fs *c, struct bch_dev *ca, - struct journal_ptr entry_ptr, - struct journal_list *jlist, struct jset *j) -{ - struct genradix_iter iter; - struct journal_replay **_i, *i, *dup; - size_t bytes = vstruct_bytes(j); - u64 last_seq = !JSET_NO_FLUSH(j) ? le64_to_cpu(j->last_seq) : 0; - struct printbuf buf = PRINTBUF; - int ret = JOURNAL_ENTRY_ADD_OK; - - if (last_seq && c->opts.journal_rewind) - last_seq = min(last_seq, c->opts.journal_rewind); - - if (!c->journal.oldest_seq_found_ondisk || - le64_to_cpu(j->seq) < c->journal.oldest_seq_found_ondisk) - c->journal.oldest_seq_found_ondisk = le64_to_cpu(j->seq); - - /* Is this entry older than the range we need? */ - if (!c->opts.read_entire_journal && - le64_to_cpu(j->seq) < jlist->last_seq) - return JOURNAL_ENTRY_ADD_OUT_OF_RANGE; - - /* - * genradixes are indexed by a ulong, not a u64, so we can't index them - * by sequence number directly: Assume instead that they will all fall - * within the range of +-2billion of the filrst one we find. - */ - if (!c->journal_entries_base_seq) - c->journal_entries_base_seq = max_t(s64, 1, le64_to_cpu(j->seq) - S32_MAX); - - /* Drop entries we don't need anymore */ - if (last_seq > jlist->last_seq && !c->opts.read_entire_journal) { - genradix_for_each_from(&c->journal_entries, iter, _i, - journal_entry_radix_idx(c, jlist->last_seq)) { - i = *_i; - - if (journal_replay_ignore(i)) - continue; - - if (le64_to_cpu(i->j.seq) >= last_seq) - break; - - journal_replay_free(c, i, false); - } - } - - jlist->last_seq = max(jlist->last_seq, last_seq); - - _i = genradix_ptr_alloc(&c->journal_entries, - journal_entry_radix_idx(c, le64_to_cpu(j->seq)), - GFP_KERNEL); - if (!_i) - return bch_err_throw(c, ENOMEM_journal_entry_add); - - /* - * Duplicate journal entries? If so we want the one that didn't have a - * checksum error: - */ - dup = *_i; - if (dup) { - bool identical = bytes == vstruct_bytes(&dup->j) && - !memcmp(j, &dup->j, bytes); - bool not_identical = !identical && - entry_ptr.csum_good && - dup->csum_good; - - bool same_device = false; - darray_for_each(dup->ptrs, ptr) - if (ptr->dev == ca->dev_idx) - same_device = true; - - ret = darray_push(&dup->ptrs, entry_ptr); - if (ret) - goto out; - - bch2_journal_replay_to_text(&buf, c, dup); - - fsck_err_on(same_device, - c, journal_entry_dup_same_device, - "duplicate journal entry on same device\n%s", - buf.buf); - - fsck_err_on(not_identical, - c, journal_entry_replicas_data_mismatch, - "found duplicate but non identical journal entries\n%s", - buf.buf); - - if (entry_ptr.csum_good && !identical) - goto replace; - - goto out; - } -replace: - i = kvmalloc(offsetof(struct journal_replay, j) + bytes, GFP_KERNEL); - if (!i) - return bch_err_throw(c, ENOMEM_journal_entry_add); - - darray_init(&i->ptrs); - i->csum_good = entry_ptr.csum_good; - i->ignore_blacklisted = false; - i->ignore_not_dirty = false; - unsafe_memcpy(&i->j, j, bytes, "embedded variable length struct"); - - if (dup) { - /* The first ptr should represent the jset we kept: */ - darray_for_each(dup->ptrs, ptr) - darray_push(&i->ptrs, *ptr); - __journal_replay_free(c, dup); - } else { - darray_push(&i->ptrs, entry_ptr); - } - - *_i = i; -out: -fsck_err: - printbuf_exit(&buf); - return ret; -} - -/* this fills in a range with empty jset_entries: */ -static void journal_entry_null_range(void *start, void *end) -{ - struct jset_entry *entry; - - for (entry = start; entry != end; entry = vstruct_next(entry)) - memset(entry, 0, sizeof(*entry)); -} - -#define JOURNAL_ENTRY_REREAD 5 -#define JOURNAL_ENTRY_NONE 6 -#define JOURNAL_ENTRY_BAD 7 - -static void journal_entry_err_msg(struct printbuf *out, - u32 version, - struct jset *jset, - struct jset_entry *entry) -{ - prt_str(out, "invalid journal entry, version="); - bch2_version_to_text(out, version); - - if (entry) { - prt_str(out, " type="); - bch2_prt_jset_entry_type(out, entry->type); - } - - if (!jset) { - prt_printf(out, " in superblock"); - } else { - - prt_printf(out, " seq=%llu", le64_to_cpu(jset->seq)); - - if (entry) - prt_printf(out, " offset=%zi/%u", - (u64 *) entry - jset->_data, - le32_to_cpu(jset->u64s)); - } - - prt_str(out, ": "); -} - -#define journal_entry_err(c, version, jset, entry, _err, msg, ...) \ -({ \ - struct printbuf _buf = PRINTBUF; \ - \ - journal_entry_err_msg(&_buf, version, jset, entry); \ - prt_printf(&_buf, msg, ##__VA_ARGS__); \ - \ - switch (from.flags & BCH_VALIDATE_write) { \ - case READ: \ - mustfix_fsck_err(c, _err, "%s", _buf.buf); \ - break; \ - case WRITE: \ - bch2_sb_error_count(c, BCH_FSCK_ERR_##_err); \ - if (bch2_fs_inconsistent(c, \ - "corrupt metadata before write: %s\n", _buf.buf)) {\ - ret = bch_err_throw(c, fsck_errors_not_fixed); \ - goto fsck_err; \ - } \ - break; \ - } \ - \ - printbuf_exit(&_buf); \ - true; \ -}) - -#define journal_entry_err_on(cond, ...) \ - ((cond) ? journal_entry_err(__VA_ARGS__) : false) - -#define FSCK_DELETED_KEY 5 - -static int journal_validate_key(struct bch_fs *c, - struct jset *jset, - struct jset_entry *entry, - struct bkey_i *k, - struct bkey_validate_context from, - unsigned version, int big_endian) -{ - enum bch_validate_flags flags = from.flags; - int write = flags & BCH_VALIDATE_write; - void *next = vstruct_next(entry); - int ret = 0; - - if (journal_entry_err_on(!k->k.u64s, - c, version, jset, entry, - journal_entry_bkey_u64s_0, - "k->u64s 0")) { - entry->u64s = cpu_to_le16((u64 *) k - entry->_data); - journal_entry_null_range(vstruct_next(entry), next); - return FSCK_DELETED_KEY; - } - - if (journal_entry_err_on((void *) bkey_next(k) > - (void *) vstruct_next(entry), - c, version, jset, entry, - journal_entry_bkey_past_end, - "extends past end of journal entry")) { - entry->u64s = cpu_to_le16((u64 *) k - entry->_data); - journal_entry_null_range(vstruct_next(entry), next); - return FSCK_DELETED_KEY; - } - - if (journal_entry_err_on(k->k.format != KEY_FORMAT_CURRENT, - c, version, jset, entry, - journal_entry_bkey_bad_format, - "bad format %u", k->k.format)) { - le16_add_cpu(&entry->u64s, -((u16) k->k.u64s)); - memmove(k, bkey_next(k), next - (void *) bkey_next(k)); - journal_entry_null_range(vstruct_next(entry), next); - return FSCK_DELETED_KEY; - } - - if (!write) - bch2_bkey_compat(from.level, from.btree, version, big_endian, - write, NULL, bkey_to_packed(k)); - - ret = bch2_bkey_validate(c, bkey_i_to_s_c(k), from); - if (ret == -BCH_ERR_fsck_delete_bkey) { - le16_add_cpu(&entry->u64s, -((u16) k->k.u64s)); - memmove(k, bkey_next(k), next - (void *) bkey_next(k)); - journal_entry_null_range(vstruct_next(entry), next); - return FSCK_DELETED_KEY; - } - if (ret) - goto fsck_err; - - if (write) - bch2_bkey_compat(from.level, from.btree, version, big_endian, - write, NULL, bkey_to_packed(k)); -fsck_err: - return ret; -} - -static int journal_entry_btree_keys_validate(struct bch_fs *c, - struct jset *jset, - struct jset_entry *entry, - unsigned version, int big_endian, - struct bkey_validate_context from) -{ - struct bkey_i *k = entry->start; - - from.level = entry->level; - from.btree = entry->btree_id; - - while (k != vstruct_last(entry)) { - int ret = journal_validate_key(c, jset, entry, k, from, version, big_endian); - if (ret == FSCK_DELETED_KEY) - continue; - else if (ret) - return ret; - - k = bkey_next(k); - } - - return 0; -} - -static void journal_entry_btree_keys_to_text(struct printbuf *out, struct bch_fs *c, - struct jset_entry *entry) -{ - bool first = true; - - jset_entry_for_each_key(entry, k) { - /* We may be called on entries that haven't been validated: */ - if (!k->k.u64s) - break; - - if (!first) { - prt_newline(out); - bch2_prt_jset_entry_type(out, entry->type); - prt_str(out, ": "); - } - bch2_btree_id_level_to_text(out, entry->btree_id, entry->level); - prt_char(out, ' '); - bch2_bkey_val_to_text(out, c, bkey_i_to_s_c(k)); - first = false; - } -} - -static int journal_entry_btree_root_validate(struct bch_fs *c, - struct jset *jset, - struct jset_entry *entry, - unsigned version, int big_endian, - struct bkey_validate_context from) -{ - struct bkey_i *k = entry->start; - int ret = 0; - - from.root = true; - from.level = entry->level + 1; - from.btree = entry->btree_id; - - if (journal_entry_err_on(!entry->u64s || - le16_to_cpu(entry->u64s) != k->k.u64s, - c, version, jset, entry, - journal_entry_btree_root_bad_size, - "invalid btree root journal entry: wrong number of keys")) { - void *next = vstruct_next(entry); - /* - * we don't want to null out this jset_entry, - * just the contents, so that later we can tell - * we were _supposed_ to have a btree root - */ - entry->u64s = 0; - journal_entry_null_range(vstruct_next(entry), next); - return 0; - } - - ret = journal_validate_key(c, jset, entry, k, from, version, big_endian); - if (ret == FSCK_DELETED_KEY) - ret = 0; -fsck_err: - return ret; -} - -static void journal_entry_btree_root_to_text(struct printbuf *out, struct bch_fs *c, - struct jset_entry *entry) -{ - journal_entry_btree_keys_to_text(out, c, entry); -} - -static int journal_entry_prio_ptrs_validate(struct bch_fs *c, - struct jset *jset, - struct jset_entry *entry, - unsigned version, int big_endian, - struct bkey_validate_context from) -{ - /* obsolete, don't care: */ - return 0; -} - -static void journal_entry_prio_ptrs_to_text(struct printbuf *out, struct bch_fs *c, - struct jset_entry *entry) -{ -} - -static int journal_entry_blacklist_validate(struct bch_fs *c, - struct jset *jset, - struct jset_entry *entry, - unsigned version, int big_endian, - struct bkey_validate_context from) -{ - int ret = 0; - - if (journal_entry_err_on(le16_to_cpu(entry->u64s) != 1, - c, version, jset, entry, - journal_entry_blacklist_bad_size, - "invalid journal seq blacklist entry: bad size")) { - journal_entry_null_range(entry, vstruct_next(entry)); - } -fsck_err: - return ret; -} - -static void journal_entry_blacklist_to_text(struct printbuf *out, struct bch_fs *c, - struct jset_entry *entry) -{ - struct jset_entry_blacklist *bl = - container_of(entry, struct jset_entry_blacklist, entry); - - prt_printf(out, "seq=%llu", le64_to_cpu(bl->seq)); -} - -static int journal_entry_blacklist_v2_validate(struct bch_fs *c, - struct jset *jset, - struct jset_entry *entry, - unsigned version, int big_endian, - struct bkey_validate_context from) -{ - struct jset_entry_blacklist_v2 *bl_entry; - int ret = 0; - - if (journal_entry_err_on(le16_to_cpu(entry->u64s) != 2, - c, version, jset, entry, - journal_entry_blacklist_v2_bad_size, - "invalid journal seq blacklist entry: bad size")) { - journal_entry_null_range(entry, vstruct_next(entry)); - goto out; - } - - bl_entry = container_of(entry, struct jset_entry_blacklist_v2, entry); - - if (journal_entry_err_on(le64_to_cpu(bl_entry->start) > - le64_to_cpu(bl_entry->end), - c, version, jset, entry, - journal_entry_blacklist_v2_start_past_end, - "invalid journal seq blacklist entry: start > end")) { - journal_entry_null_range(entry, vstruct_next(entry)); - } -out: -fsck_err: - return ret; -} - -static void journal_entry_blacklist_v2_to_text(struct printbuf *out, struct bch_fs *c, - struct jset_entry *entry) -{ - struct jset_entry_blacklist_v2 *bl = - container_of(entry, struct jset_entry_blacklist_v2, entry); - - prt_printf(out, "start=%llu end=%llu", - le64_to_cpu(bl->start), - le64_to_cpu(bl->end)); -} - -static int journal_entry_usage_validate(struct bch_fs *c, - struct jset *jset, - struct jset_entry *entry, - unsigned version, int big_endian, - struct bkey_validate_context from) -{ - struct jset_entry_usage *u = - container_of(entry, struct jset_entry_usage, entry); - unsigned bytes = jset_u64s(le16_to_cpu(entry->u64s)) * sizeof(u64); - int ret = 0; - - if (journal_entry_err_on(bytes < sizeof(*u), - c, version, jset, entry, - journal_entry_usage_bad_size, - "invalid journal entry usage: bad size")) { - journal_entry_null_range(entry, vstruct_next(entry)); - return ret; - } - -fsck_err: - return ret; -} - -static void journal_entry_usage_to_text(struct printbuf *out, struct bch_fs *c, - struct jset_entry *entry) -{ - struct jset_entry_usage *u = - container_of(entry, struct jset_entry_usage, entry); - - prt_str(out, "type="); - bch2_prt_fs_usage_type(out, u->entry.btree_id); - prt_printf(out, " v=%llu", le64_to_cpu(u->v)); -} - -static int journal_entry_data_usage_validate(struct bch_fs *c, - struct jset *jset, - struct jset_entry *entry, - unsigned version, int big_endian, - struct bkey_validate_context from) -{ - struct jset_entry_data_usage *u = - container_of(entry, struct jset_entry_data_usage, entry); - unsigned bytes = jset_u64s(le16_to_cpu(entry->u64s)) * sizeof(u64); - struct printbuf err = PRINTBUF; - int ret = 0; - - if (journal_entry_err_on(bytes < sizeof(*u) || - bytes < sizeof(*u) + u->r.nr_devs, - c, version, jset, entry, - journal_entry_data_usage_bad_size, - "invalid journal entry usage: bad size")) { - journal_entry_null_range(entry, vstruct_next(entry)); - goto out; - } - - if (journal_entry_err_on(bch2_replicas_entry_validate(&u->r, c, &err), - c, version, jset, entry, - journal_entry_data_usage_bad_size, - "invalid journal entry usage: %s", err.buf)) { - journal_entry_null_range(entry, vstruct_next(entry)); - goto out; - } -out: -fsck_err: - printbuf_exit(&err); - return ret; -} - -static void journal_entry_data_usage_to_text(struct printbuf *out, struct bch_fs *c, - struct jset_entry *entry) -{ - struct jset_entry_data_usage *u = - container_of(entry, struct jset_entry_data_usage, entry); - - bch2_replicas_entry_to_text(out, &u->r); - prt_printf(out, "=%llu", le64_to_cpu(u->v)); -} - -static int journal_entry_clock_validate(struct bch_fs *c, - struct jset *jset, - struct jset_entry *entry, - unsigned version, int big_endian, - struct bkey_validate_context from) -{ - struct jset_entry_clock *clock = - container_of(entry, struct jset_entry_clock, entry); - unsigned bytes = jset_u64s(le16_to_cpu(entry->u64s)) * sizeof(u64); - int ret = 0; - - if (journal_entry_err_on(bytes != sizeof(*clock), - c, version, jset, entry, - journal_entry_clock_bad_size, - "bad size")) { - journal_entry_null_range(entry, vstruct_next(entry)); - return ret; - } - - if (journal_entry_err_on(clock->rw > 1, - c, version, jset, entry, - journal_entry_clock_bad_rw, - "bad rw")) { - journal_entry_null_range(entry, vstruct_next(entry)); - return ret; - } - -fsck_err: - return ret; -} - -static void journal_entry_clock_to_text(struct printbuf *out, struct bch_fs *c, - struct jset_entry *entry) -{ - struct jset_entry_clock *clock = - container_of(entry, struct jset_entry_clock, entry); - - prt_printf(out, "%s=%llu", str_write_read(clock->rw), le64_to_cpu(clock->time)); -} - -static int journal_entry_dev_usage_validate(struct bch_fs *c, - struct jset *jset, - struct jset_entry *entry, - unsigned version, int big_endian, - struct bkey_validate_context from) -{ - struct jset_entry_dev_usage *u = - container_of(entry, struct jset_entry_dev_usage, entry); - unsigned bytes = jset_u64s(le16_to_cpu(entry->u64s)) * sizeof(u64); - unsigned expected = sizeof(*u); - int ret = 0; - - if (journal_entry_err_on(bytes < expected, - c, version, jset, entry, - journal_entry_dev_usage_bad_size, - "bad size (%u < %u)", - bytes, expected)) { - journal_entry_null_range(entry, vstruct_next(entry)); - return ret; - } - - if (journal_entry_err_on(u->pad, - c, version, jset, entry, - journal_entry_dev_usage_bad_pad, - "bad pad")) { - journal_entry_null_range(entry, vstruct_next(entry)); - return ret; - } - -fsck_err: - return ret; -} - -static void journal_entry_dev_usage_to_text(struct printbuf *out, struct bch_fs *c, - struct jset_entry *entry) -{ - struct jset_entry_dev_usage *u = - container_of(entry, struct jset_entry_dev_usage, entry); - unsigned i, nr_types = jset_entry_dev_usage_nr_types(u); - - if (vstruct_bytes(entry) < sizeof(*u)) - return; - - prt_printf(out, "dev=%u", le32_to_cpu(u->dev)); - - printbuf_indent_add(out, 2); - for (i = 0; i < nr_types; i++) { - prt_newline(out); - bch2_prt_data_type(out, i); - prt_printf(out, ": buckets=%llu sectors=%llu fragmented=%llu", - le64_to_cpu(u->d[i].buckets), - le64_to_cpu(u->d[i].sectors), - le64_to_cpu(u->d[i].fragmented)); - } - printbuf_indent_sub(out, 2); -} - -static int journal_entry_log_validate(struct bch_fs *c, - struct jset *jset, - struct jset_entry *entry, - unsigned version, int big_endian, - struct bkey_validate_context from) -{ - return 0; -} - -static void journal_entry_log_to_text(struct printbuf *out, struct bch_fs *c, - struct jset_entry *entry) -{ - struct jset_entry_log *l = container_of(entry, struct jset_entry_log, entry); - - prt_printf(out, "%.*s", jset_entry_log_msg_bytes(l), l->d); -} - -static int journal_entry_overwrite_validate(struct bch_fs *c, - struct jset *jset, - struct jset_entry *entry, - unsigned version, int big_endian, - struct bkey_validate_context from) -{ - from.flags = 0; - return journal_entry_btree_keys_validate(c, jset, entry, - version, big_endian, from); -} - -static void journal_entry_overwrite_to_text(struct printbuf *out, struct bch_fs *c, - struct jset_entry *entry) -{ - journal_entry_btree_keys_to_text(out, c, entry); -} - -static int journal_entry_log_bkey_validate(struct bch_fs *c, - struct jset *jset, - struct jset_entry *entry, - unsigned version, int big_endian, - struct bkey_validate_context from) -{ - from.flags = 0; - return journal_entry_btree_keys_validate(c, jset, entry, - version, big_endian, from); -} - -static void journal_entry_log_bkey_to_text(struct printbuf *out, struct bch_fs *c, - struct jset_entry *entry) -{ - journal_entry_btree_keys_to_text(out, c, entry); -} - -static int journal_entry_write_buffer_keys_validate(struct bch_fs *c, - struct jset *jset, - struct jset_entry *entry, - unsigned version, int big_endian, - struct bkey_validate_context from) -{ - return journal_entry_btree_keys_validate(c, jset, entry, - version, big_endian, from); -} - -static void journal_entry_write_buffer_keys_to_text(struct printbuf *out, struct bch_fs *c, - struct jset_entry *entry) -{ - journal_entry_btree_keys_to_text(out, c, entry); -} - -static int journal_entry_datetime_validate(struct bch_fs *c, - struct jset *jset, - struct jset_entry *entry, - unsigned version, int big_endian, - struct bkey_validate_context from) -{ - unsigned bytes = vstruct_bytes(entry); - unsigned expected = 16; - int ret = 0; - - if (journal_entry_err_on(vstruct_bytes(entry) < expected, - c, version, jset, entry, - journal_entry_dev_usage_bad_size, - "bad size (%u < %u)", - bytes, expected)) { - journal_entry_null_range(entry, vstruct_next(entry)); - return ret; - } -fsck_err: - return ret; -} - -static void journal_entry_datetime_to_text(struct printbuf *out, struct bch_fs *c, - struct jset_entry *entry) -{ - struct jset_entry_datetime *datetime = - container_of(entry, struct jset_entry_datetime, entry); - - bch2_prt_datetime(out, le64_to_cpu(datetime->seconds)); -} - -struct jset_entry_ops { - int (*validate)(struct bch_fs *, struct jset *, - struct jset_entry *, unsigned, int, - struct bkey_validate_context); - void (*to_text)(struct printbuf *, struct bch_fs *, struct jset_entry *); -}; - -static const struct jset_entry_ops bch2_jset_entry_ops[] = { -#define x(f, nr) \ - [BCH_JSET_ENTRY_##f] = (struct jset_entry_ops) { \ - .validate = journal_entry_##f##_validate, \ - .to_text = journal_entry_##f##_to_text, \ - }, - BCH_JSET_ENTRY_TYPES() -#undef x -}; - -int bch2_journal_entry_validate(struct bch_fs *c, - struct jset *jset, - struct jset_entry *entry, - unsigned version, int big_endian, - struct bkey_validate_context from) -{ - return entry->type < BCH_JSET_ENTRY_NR - ? bch2_jset_entry_ops[entry->type].validate(c, jset, entry, - version, big_endian, from) - : 0; -} - -void bch2_journal_entry_to_text(struct printbuf *out, struct bch_fs *c, - struct jset_entry *entry) -{ - bch2_prt_jset_entry_type(out, entry->type); - - if (entry->type < BCH_JSET_ENTRY_NR) { - prt_str(out, ": "); - bch2_jset_entry_ops[entry->type].to_text(out, c, entry); - } -} - -static int jset_validate_entries(struct bch_fs *c, struct jset *jset, - enum bch_validate_flags flags) -{ - struct bkey_validate_context from = { - .flags = flags, - .from = BKEY_VALIDATE_journal, - .journal_seq = le64_to_cpu(jset->seq), - }; - - unsigned version = le32_to_cpu(jset->version); - int ret = 0; - - vstruct_for_each(jset, entry) { - from.journal_offset = (u64 *) entry - jset->_data; - - if (journal_entry_err_on(vstruct_next(entry) > vstruct_last(jset), - c, version, jset, entry, - journal_entry_past_jset_end, - "journal entry extends past end of jset")) { - jset->u64s = cpu_to_le32((u64 *) entry - jset->_data); - break; - } - - ret = bch2_journal_entry_validate(c, jset, entry, version, - JSET_BIG_ENDIAN(jset), from); - if (ret) - break; - } -fsck_err: - return ret; -} - -static int jset_validate(struct bch_fs *c, - struct bch_dev *ca, - struct jset *jset, u64 sector, - enum bch_validate_flags flags) -{ - struct bkey_validate_context from = { - .flags = flags, - .from = BKEY_VALIDATE_journal, - .journal_seq = le64_to_cpu(jset->seq), - }; - int ret = 0; - - if (le64_to_cpu(jset->magic) != jset_magic(c)) - return JOURNAL_ENTRY_NONE; - - unsigned version = le32_to_cpu(jset->version); - if (journal_entry_err_on(!bch2_version_compatible(version), - c, version, jset, NULL, - jset_unsupported_version, - "%s sector %llu seq %llu: incompatible journal entry version %u.%u", - ca ? ca->name : c->name, - sector, le64_to_cpu(jset->seq), - BCH_VERSION_MAJOR(version), - BCH_VERSION_MINOR(version))) { - /* don't try to continue: */ - return -EINVAL; - } - - if (journal_entry_err_on(!bch2_checksum_type_valid(c, JSET_CSUM_TYPE(jset)), - c, version, jset, NULL, - jset_unknown_csum, - "%s sector %llu seq %llu: journal entry with unknown csum type %llu", - ca ? ca->name : c->name, - sector, le64_to_cpu(jset->seq), - JSET_CSUM_TYPE(jset))) - ret = JOURNAL_ENTRY_BAD; - - /* last_seq is ignored when JSET_NO_FLUSH is true */ - if (journal_entry_err_on(!JSET_NO_FLUSH(jset) && - le64_to_cpu(jset->last_seq) > le64_to_cpu(jset->seq), - c, version, jset, NULL, - jset_last_seq_newer_than_seq, - "invalid journal entry: last_seq > seq (%llu > %llu)", - le64_to_cpu(jset->last_seq), - le64_to_cpu(jset->seq))) { - jset->last_seq = jset->seq; - return JOURNAL_ENTRY_BAD; - } - - ret = jset_validate_entries(c, jset, flags); -fsck_err: - return ret; -} - -static int jset_validate_early(struct bch_fs *c, - struct bch_dev *ca, - struct jset *jset, u64 sector, - unsigned bucket_sectors_left, - unsigned sectors_read) -{ - struct bkey_validate_context from = { - .from = BKEY_VALIDATE_journal, - .journal_seq = le64_to_cpu(jset->seq), - }; - int ret = 0; - - if (le64_to_cpu(jset->magic) != jset_magic(c)) - return JOURNAL_ENTRY_NONE; - - unsigned version = le32_to_cpu(jset->version); - if (journal_entry_err_on(!bch2_version_compatible(version), - c, version, jset, NULL, - jset_unsupported_version, - "%s sector %llu seq %llu: unknown journal entry version %u.%u", - ca ? ca->name : c->name, - sector, le64_to_cpu(jset->seq), - BCH_VERSION_MAJOR(version), - BCH_VERSION_MINOR(version))) { - /* don't try to continue: */ - return -EINVAL; - } - - size_t bytes = vstruct_bytes(jset); - if (bytes > (sectors_read << 9) && - sectors_read < bucket_sectors_left) - return JOURNAL_ENTRY_REREAD; - - if (journal_entry_err_on(bytes > bucket_sectors_left << 9, - c, version, jset, NULL, - jset_past_bucket_end, - "%s sector %llu seq %llu: journal entry too big (%zu bytes)", - ca ? ca->name : c->name, - sector, le64_to_cpu(jset->seq), bytes)) - le32_add_cpu(&jset->u64s, - -((bytes - (bucket_sectors_left << 9)) / 8)); -fsck_err: - return ret; -} - -struct journal_read_buf { - void *data; - size_t size; -}; - -static int journal_read_buf_realloc(struct bch_fs *c, struct journal_read_buf *b, - size_t new_size) -{ - void *n; - - /* the bios are sized for this many pages, max: */ - if (new_size > JOURNAL_ENTRY_SIZE_MAX) - return bch_err_throw(c, ENOMEM_journal_read_buf_realloc); - - new_size = roundup_pow_of_two(new_size); - n = kvmalloc(new_size, GFP_KERNEL); - if (!n) - return bch_err_throw(c, ENOMEM_journal_read_buf_realloc); - - kvfree(b->data); - b->data = n; - b->size = new_size; - return 0; -} - -static int journal_read_bucket(struct bch_dev *ca, - struct journal_read_buf *buf, - struct journal_list *jlist, - unsigned bucket) -{ - struct bch_fs *c = ca->fs; - struct journal_device *ja = &ca->journal; - struct jset *j = NULL; - unsigned sectors, sectors_read = 0; - u64 offset = bucket_to_sector(ca, ja->buckets[bucket]), - end = offset + ca->mi.bucket_size; - bool saw_bad = false, csum_good; - int ret = 0; - - pr_debug("reading %u", bucket); - - while (offset < end) { - if (!sectors_read) { - struct bio *bio; - unsigned nr_bvecs; -reread: - sectors_read = min_t(unsigned, - end - offset, buf->size >> 9); - nr_bvecs = buf_pages(buf->data, sectors_read << 9); - - bio = bio_kmalloc(nr_bvecs, GFP_KERNEL); - if (!bio) - return bch_err_throw(c, ENOMEM_journal_read_bucket); - bio_init(bio, ca->disk_sb.bdev, bio->bi_inline_vecs, nr_bvecs, REQ_OP_READ); - - bio->bi_iter.bi_sector = offset; - bch2_bio_map(bio, buf->data, sectors_read << 9); - - u64 submit_time = local_clock(); - ret = submit_bio_wait(bio); - kfree(bio); - - if (!ret && bch2_meta_read_fault("journal")) - ret = bch_err_throw(c, EIO_fault_injected); - - bch2_account_io_completion(ca, BCH_MEMBER_ERROR_read, - submit_time, !ret); - - if (ret) { - bch_err_dev_ratelimited(ca, - "journal read error: sector %llu", offset); - /* - * We don't error out of the recovery process - * here, since the relevant journal entry may be - * found on a different device, and missing or - * no journal entries will be handled later - */ - return 0; - } - - j = buf->data; - } - - ret = jset_validate_early(c, ca, j, offset, - end - offset, sectors_read); - switch (ret) { - case 0: - sectors = vstruct_sectors(j, c->block_bits); - break; - case JOURNAL_ENTRY_REREAD: - if (vstruct_bytes(j) > buf->size) { - ret = journal_read_buf_realloc(c, buf, - vstruct_bytes(j)); - if (ret) - return ret; - } - goto reread; - case JOURNAL_ENTRY_NONE: - if (!saw_bad) - return 0; - /* - * On checksum error we don't really trust the size - * field of the journal entry we read, so try reading - * again at next block boundary: - */ - sectors = block_sectors(c); - goto next_block; - default: - return ret; - } - - if (le64_to_cpu(j->seq) > ja->highest_seq_found) { - ja->highest_seq_found = le64_to_cpu(j->seq); - ja->cur_idx = bucket; - ja->sectors_free = ca->mi.bucket_size - - bucket_remainder(ca, offset) - sectors; - } - - /* - * This happens sometimes if we don't have discards on - - * when we've partially overwritten a bucket with new - * journal entries. We don't need the rest of the - * bucket: - */ - if (le64_to_cpu(j->seq) < ja->bucket_seq[bucket]) - return 0; - - ja->bucket_seq[bucket] = le64_to_cpu(j->seq); - - struct bch_csum csum; - csum_good = jset_csum_good(c, j, &csum); - - bch2_account_io_completion(ca, BCH_MEMBER_ERROR_checksum, 0, csum_good); - - if (!csum_good) { - /* - * Don't print an error here, we'll print the error - * later if we need this journal entry - */ - saw_bad = true; - } - - ret = bch2_encrypt(c, JSET_CSUM_TYPE(j), journal_nonce(j), - j->encrypted_start, - vstruct_end(j) - (void *) j->encrypted_start); - bch2_fs_fatal_err_on(ret, c, "decrypting journal entry: %s", bch2_err_str(ret)); - - mutex_lock(&jlist->lock); - ret = journal_entry_add(c, ca, (struct journal_ptr) { - .csum_good = csum_good, - .csum = csum, - .dev = ca->dev_idx, - .bucket = bucket, - .bucket_offset = offset - - bucket_to_sector(ca, ja->buckets[bucket]), - .sector = offset, - }, jlist, j); - mutex_unlock(&jlist->lock); - - switch (ret) { - case JOURNAL_ENTRY_ADD_OK: - break; - case JOURNAL_ENTRY_ADD_OUT_OF_RANGE: - break; - default: - return ret; - } -next_block: - pr_debug("next"); - offset += sectors; - sectors_read -= sectors; - j = ((void *) j) + (sectors << 9); - } - - return 0; -} - -static CLOSURE_CALLBACK(bch2_journal_read_device) -{ - closure_type(ja, struct journal_device, read); - struct bch_dev *ca = container_of(ja, struct bch_dev, journal); - struct bch_fs *c = ca->fs; - struct journal_list *jlist = - container_of(cl->parent, struct journal_list, cl); - struct journal_read_buf buf = { NULL, 0 }; - unsigned i; - int ret = 0; - - if (!ja->nr) - goto out; - - ret = journal_read_buf_realloc(c, &buf, PAGE_SIZE); - if (ret) - goto err; - - pr_debug("%u journal buckets", ja->nr); - - for (i = 0; i < ja->nr; i++) { - ret = journal_read_bucket(ca, &buf, jlist, i); - if (ret) - goto err; - } - - /* - * Set dirty_idx to indicate the entire journal is full and needs to be - * reclaimed - journal reclaim will immediately reclaim whatever isn't - * pinned when it first runs: - */ - ja->discard_idx = ja->dirty_idx_ondisk = - ja->dirty_idx = (ja->cur_idx + 1) % ja->nr; -out: - bch_verbose(c, "journal read done on device %s, ret %i", ca->name, ret); - kvfree(buf.data); - enumerated_ref_put(&ca->io_ref[READ], BCH_DEV_READ_REF_journal_read); - closure_return(cl); - return; -err: - mutex_lock(&jlist->lock); - jlist->ret = ret; - mutex_unlock(&jlist->lock); - goto out; -} - -noinline_for_stack -static void bch2_journal_print_checksum_error(struct bch_fs *c, struct journal_replay *j) -{ - struct printbuf buf = PRINTBUF; - enum bch_csum_type csum_type = JSET_CSUM_TYPE(&j->j); - bool have_good = false; - - prt_printf(&buf, "invalid journal checksum(s) at seq %llu ", le64_to_cpu(j->j.seq)); - bch2_journal_datetime_to_text(&buf, &j->j); - prt_newline(&buf); - - darray_for_each(j->ptrs, ptr) - if (!ptr->csum_good) { - bch2_journal_ptr_to_text(&buf, c, ptr); - prt_char(&buf, ' '); - bch2_csum_to_text(&buf, csum_type, ptr->csum); - prt_newline(&buf); - } else { - have_good = true; - } - - prt_printf(&buf, "should be "); - bch2_csum_to_text(&buf, csum_type, j->j.csum); - - if (have_good) - prt_printf(&buf, "\n(had good copy on another device)"); - - bch2_print_str(c, KERN_ERR, buf.buf); - printbuf_exit(&buf); -} - -noinline_for_stack -static int bch2_journal_check_for_missing(struct bch_fs *c, u64 start_seq, u64 end_seq) -{ - struct printbuf buf = PRINTBUF; - int ret = 0; - - struct genradix_iter radix_iter; - struct journal_replay *i, **_i, *prev = NULL; - u64 seq = start_seq; - - genradix_for_each(&c->journal_entries, radix_iter, _i) { - i = *_i; - - if (journal_replay_ignore(i)) - continue; - - BUG_ON(seq > le64_to_cpu(i->j.seq)); - - while (seq < le64_to_cpu(i->j.seq)) { - while (seq < le64_to_cpu(i->j.seq) && - bch2_journal_seq_is_blacklisted(c, seq, false)) - seq++; - - if (seq == le64_to_cpu(i->j.seq)) - break; - - u64 missing_start = seq; - - while (seq < le64_to_cpu(i->j.seq) && - !bch2_journal_seq_is_blacklisted(c, seq, false)) - seq++; - - u64 missing_end = seq - 1; - - printbuf_reset(&buf); - prt_printf(&buf, "journal entries %llu-%llu missing! (replaying %llu-%llu)", - missing_start, missing_end, - start_seq, end_seq); - - prt_printf(&buf, "\nprev at "); - if (prev) { - bch2_journal_ptrs_to_text(&buf, c, prev); - prt_printf(&buf, " size %zu", vstruct_sectors(&prev->j, c->block_bits)); - } else - prt_printf(&buf, "(none)"); - - prt_printf(&buf, "\nnext at "); - bch2_journal_ptrs_to_text(&buf, c, i); - prt_printf(&buf, ", continue?"); - - fsck_err(c, journal_entries_missing, "%s", buf.buf); - } - - prev = i; - seq++; - } -fsck_err: - printbuf_exit(&buf); - return ret; -} - -int bch2_journal_read(struct bch_fs *c, - u64 *last_seq, - u64 *blacklist_seq, - u64 *start_seq) -{ - struct journal_list jlist; - struct journal_replay *i, **_i; - struct genradix_iter radix_iter; - struct printbuf buf = PRINTBUF; - bool degraded = false, last_write_torn = false; - u64 seq; - int ret = 0; - - closure_init_stack(&jlist.cl); - mutex_init(&jlist.lock); - jlist.last_seq = 0; - jlist.ret = 0; - - for_each_member_device(c, ca) { - if (!c->opts.fsck && - !(bch2_dev_has_data(c, ca) & (1 << BCH_DATA_journal))) - continue; - - if ((ca->mi.state == BCH_MEMBER_STATE_rw || - ca->mi.state == BCH_MEMBER_STATE_ro) && - enumerated_ref_tryget(&ca->io_ref[READ], - BCH_DEV_READ_REF_journal_read)) - closure_call(&ca->journal.read, - bch2_journal_read_device, - system_dfl_wq, - &jlist.cl); - else - degraded = true; - } - - while (closure_sync_timeout(&jlist.cl, sysctl_hung_task_timeout_secs * HZ / 2)) - ; - - if (jlist.ret) - return jlist.ret; - - *last_seq = 0; - *start_seq = 0; - *blacklist_seq = 0; - - /* - * Find most recent flush entry, and ignore newer non flush entries - - * those entries will be blacklisted: - */ - genradix_for_each_reverse(&c->journal_entries, radix_iter, _i) { - i = *_i; - - if (journal_replay_ignore(i)) - continue; - - if (!*start_seq) - *blacklist_seq = *start_seq = le64_to_cpu(i->j.seq) + 1; - - if (JSET_NO_FLUSH(&i->j)) { - i->ignore_blacklisted = true; - continue; - } - - if (!last_write_torn && !i->csum_good) { - last_write_torn = true; - i->ignore_blacklisted = true; - continue; - } - - struct bkey_validate_context from = { - .from = BKEY_VALIDATE_journal, - .journal_seq = le64_to_cpu(i->j.seq), - }; - if (journal_entry_err_on(le64_to_cpu(i->j.last_seq) > le64_to_cpu(i->j.seq), - c, le32_to_cpu(i->j.version), &i->j, NULL, - jset_last_seq_newer_than_seq, - "invalid journal entry: last_seq > seq (%llu > %llu)", - le64_to_cpu(i->j.last_seq), - le64_to_cpu(i->j.seq))) - i->j.last_seq = i->j.seq; - - *last_seq = le64_to_cpu(i->j.last_seq); - *blacklist_seq = le64_to_cpu(i->j.seq) + 1; - break; - } - - if (!*start_seq) { - bch_info(c, "journal read done, but no entries found"); - return 0; - } - - if (!*last_seq) { - fsck_err(c, dirty_but_no_journal_entries_post_drop_nonflushes, - "journal read done, but no entries found after dropping non-flushes"); - return 0; - } - - printbuf_reset(&buf); - prt_printf(&buf, "journal read done, replaying entries %llu-%llu", - *last_seq, *blacklist_seq - 1); - - /* - * Drop blacklisted entries and entries older than last_seq (or start of - * journal rewind: - */ - u64 drop_before = *last_seq; - if (c->opts.journal_rewind) { - drop_before = min(drop_before, c->opts.journal_rewind); - prt_printf(&buf, " (rewinding from %llu)", c->opts.journal_rewind); - } - - *last_seq = drop_before; - if (*start_seq != *blacklist_seq) - prt_printf(&buf, " (unflushed %llu-%llu)", *blacklist_seq, *start_seq - 1); - bch_info(c, "%s", buf.buf); - genradix_for_each(&c->journal_entries, radix_iter, _i) { - i = *_i; - - if (journal_replay_ignore(i)) - continue; - - seq = le64_to_cpu(i->j.seq); - if (seq < drop_before) { - journal_replay_free(c, i, false); - continue; - } - - if (bch2_journal_seq_is_blacklisted(c, seq, true)) { - fsck_err_on(!JSET_NO_FLUSH(&i->j), c, - jset_seq_blacklisted, - "found blacklisted journal entry %llu", seq); - i->ignore_blacklisted = true; - } - } - - ret = bch2_journal_check_for_missing(c, drop_before, *blacklist_seq - 1); - if (ret) - goto err; - - genradix_for_each(&c->journal_entries, radix_iter, _i) { - union bch_replicas_padded replicas = { - .e.data_type = BCH_DATA_journal, - .e.nr_devs = 0, - .e.nr_required = 1, - }; - - i = *_i; - if (journal_replay_ignore(i)) - continue; - - /* - * Don't print checksum errors until we know we're going to use - * a given journal entry: - */ - darray_for_each(i->ptrs, ptr) - if (!ptr->csum_good) { - bch2_journal_print_checksum_error(c, i); - break; - } - - ret = jset_validate(c, - bch2_dev_have_ref(c, i->ptrs.data[0].dev), - &i->j, - i->ptrs.data[0].sector, - READ); - if (ret) - goto err; - - darray_for_each(i->ptrs, ptr) - replicas_entry_add_dev(&replicas.e, ptr->dev); - - bch2_replicas_entry_sort(&replicas.e); - - printbuf_reset(&buf); - bch2_replicas_entry_to_text(&buf, &replicas.e); - - if (!degraded && - !bch2_replicas_marked(c, &replicas.e) && - (le64_to_cpu(i->j.seq) == *last_seq || - fsck_err(c, journal_entry_replicas_not_marked, - "superblock not marked as containing replicas for journal entry %llu\n%s", - le64_to_cpu(i->j.seq), buf.buf))) { - ret = bch2_mark_replicas(c, &replicas.e); - if (ret) - goto err; - } - } -err: -fsck_err: - printbuf_exit(&buf); - return ret; -} - -/* journal write: */ - -static void journal_advance_devs_to_next_bucket(struct journal *j, - struct dev_alloc_list *devs, - unsigned sectors, __le64 seq) -{ - struct bch_fs *c = container_of(j, struct bch_fs, journal); - - guard(rcu)(); - darray_for_each(*devs, i) { - struct bch_dev *ca = rcu_dereference(c->devs[*i]); - if (!ca) - continue; - - struct journal_device *ja = &ca->journal; - - if (sectors > ja->sectors_free && - sectors <= ca->mi.bucket_size && - bch2_journal_dev_buckets_available(j, ja, - journal_space_discarded)) { - ja->cur_idx = (ja->cur_idx + 1) % ja->nr; - ja->sectors_free = ca->mi.bucket_size; - - /* - * ja->bucket_seq[ja->cur_idx] must always have - * something sensible: - */ - ja->bucket_seq[ja->cur_idx] = le64_to_cpu(seq); - } - } -} - -static void __journal_write_alloc(struct journal *j, - struct journal_buf *w, - struct dev_alloc_list *devs, - unsigned sectors, - unsigned *replicas, - unsigned replicas_want) -{ - struct bch_fs *c = container_of(j, struct bch_fs, journal); - - darray_for_each(*devs, i) { - struct bch_dev *ca = bch2_dev_get_ioref(c, *i, WRITE, - BCH_DEV_WRITE_REF_journal_write); - if (!ca) - continue; - - struct journal_device *ja = &ca->journal; - - /* - * Check that we can use this device, and aren't already using - * it: - */ - if (!ca->mi.durability || - ca->mi.state != BCH_MEMBER_STATE_rw || - !ja->nr || - bch2_bkey_has_device_c(bkey_i_to_s_c(&w->key), ca->dev_idx) || - sectors > ja->sectors_free) { - enumerated_ref_put(&ca->io_ref[WRITE], BCH_DEV_WRITE_REF_journal_write); - continue; - } - - bch2_dev_stripe_increment(ca, &j->wp.stripe); - - bch2_bkey_append_ptr(&w->key, - (struct bch_extent_ptr) { - .offset = bucket_to_sector(ca, - ja->buckets[ja->cur_idx]) + - ca->mi.bucket_size - - ja->sectors_free, - .dev = ca->dev_idx, - }); - - ja->sectors_free -= sectors; - ja->bucket_seq[ja->cur_idx] = le64_to_cpu(w->data->seq); - - *replicas += ca->mi.durability; - - if (*replicas >= replicas_want) - break; - } -} - -static int journal_write_alloc(struct journal *j, struct journal_buf *w, - unsigned *replicas) -{ - struct bch_fs *c = container_of(j, struct bch_fs, journal); - struct bch_devs_mask devs; - struct dev_alloc_list devs_sorted; - unsigned sectors = vstruct_sectors(w->data, c->block_bits); - unsigned target = c->opts.metadata_target ?: - c->opts.foreground_target; - unsigned replicas_want = READ_ONCE(c->opts.metadata_replicas); - unsigned replicas_need = min_t(unsigned, replicas_want, - READ_ONCE(c->opts.metadata_replicas_required)); - bool advance_done = false; - -retry_target: - devs = target_rw_devs(c, BCH_DATA_journal, target); - bch2_dev_alloc_list(c, &j->wp.stripe, &devs, &devs_sorted); -retry_alloc: - __journal_write_alloc(j, w, &devs_sorted, sectors, replicas, replicas_want); - - if (likely(*replicas >= replicas_want)) - goto done; - - if (!advance_done) { - journal_advance_devs_to_next_bucket(j, &devs_sorted, sectors, w->data->seq); - advance_done = true; - goto retry_alloc; - } - - if (*replicas < replicas_want && target) { - /* Retry from all devices: */ - target = 0; - advance_done = false; - goto retry_target; - } -done: - BUG_ON(bkey_val_u64s(&w->key.k) > BCH_REPLICAS_MAX); - -#if 0 - /* - * XXX: we need a way to alert the user when we go degraded for any - * reason - */ - if (*replicas < min(replicas_want, - dev_mask_nr(&c->rw_devs[BCH_DATA_free]))) { - } -#endif - - return *replicas >= replicas_need ? 0 : -BCH_ERR_insufficient_journal_devices; -} - -static void journal_buf_realloc(struct journal *j, struct journal_buf *buf) -{ - struct bch_fs *c = container_of(j, struct bch_fs, journal); - - /* we aren't holding j->lock: */ - unsigned new_size = READ_ONCE(j->buf_size_want); - void *new_buf; - - if (buf->buf_size >= new_size) - return; - - size_t btree_write_buffer_size = new_size / 64; - - if (bch2_btree_write_buffer_resize(c, btree_write_buffer_size)) - return; - - new_buf = kvmalloc(new_size, GFP_NOFS|__GFP_NOWARN); - if (!new_buf) - return; - - memcpy(new_buf, buf->data, buf->buf_size); - - spin_lock(&j->lock); - swap(buf->data, new_buf); - swap(buf->buf_size, new_size); - spin_unlock(&j->lock); - - kvfree(new_buf); -} - -static CLOSURE_CALLBACK(journal_write_done) -{ - closure_type(w, struct journal_buf, io); - struct journal *j = container_of(w, struct journal, buf[w->idx]); - struct bch_fs *c = container_of(j, struct bch_fs, journal); - union bch_replicas_padded replicas; - u64 seq = le64_to_cpu(w->data->seq); - int err = 0; - - bch2_time_stats_update(!JSET_NO_FLUSH(w->data) - ? j->flush_write_time - : j->noflush_write_time, j->write_start_time); - - if (!w->devs_written.nr) { - err = bch_err_throw(c, journal_write_err); - } else { - bch2_devlist_to_replicas(&replicas.e, BCH_DATA_journal, - w->devs_written); - err = bch2_mark_replicas(c, &replicas.e); - } - - if (err && !bch2_journal_error(j)) { - struct printbuf buf = PRINTBUF; - bch2_log_msg_start(c, &buf); - - if (err == -BCH_ERR_journal_write_err) - prt_printf(&buf, "unable to write journal to sufficient devices\n"); - else - prt_printf(&buf, "journal write error marking replicas: %s\n", - bch2_err_str(err)); - - bch2_fs_emergency_read_only2(c, &buf); - - bch2_print_str(c, KERN_ERR, buf.buf); - printbuf_exit(&buf); - } - - closure_debug_destroy(cl); - - spin_lock(&j->lock); - if (seq >= j->pin.front) - journal_seq_pin(j, seq)->devs = w->devs_written; - if (err && (!j->err_seq || seq < j->err_seq)) - j->err_seq = seq; - w->write_done = true; - - if (!j->free_buf || j->free_buf_size < w->buf_size) { - swap(j->free_buf, w->data); - swap(j->free_buf_size, w->buf_size); - } - - if (w->data) { - void *buf = w->data; - w->data = NULL; - w->buf_size = 0; - - spin_unlock(&j->lock); - kvfree(buf); - spin_lock(&j->lock); - } - - bool completed = false; - bool do_discards = false; - - for (seq = journal_last_unwritten_seq(j); - seq <= journal_cur_seq(j); - seq++) { - w = j->buf + (seq & JOURNAL_BUF_MASK); - if (!w->write_done) - break; - - if (!j->err_seq && !w->noflush) { - j->flushed_seq_ondisk = seq; - j->last_seq_ondisk = w->last_seq; - - closure_wake_up(&c->freelist_wait); - bch2_reset_alloc_cursors(c); - do_discards = true; - } - - j->seq_ondisk = seq; - - /* - * Updating last_seq_ondisk may let bch2_journal_reclaim_work() discard - * more buckets: - * - * Must come before signaling write completion, for - * bch2_fs_journal_stop(): - */ - if (j->watermark != BCH_WATERMARK_stripe) - journal_reclaim_kick(&c->journal); - - closure_wake_up(&w->wait); - completed = true; - } - - if (completed) { - bch2_journal_reclaim_fast(j); - bch2_journal_space_available(j); - - track_event_change(&c->times[BCH_TIME_blocked_journal_max_in_flight], false); - - journal_wake(j); - } - - if (journal_last_unwritten_seq(j) == journal_cur_seq(j) && - j->reservations.cur_entry_offset < JOURNAL_ENTRY_CLOSED_VAL) { - struct journal_buf *buf = journal_cur_buf(j); - long delta = buf->expires - jiffies; - - /* - * We don't close a journal entry to write it while there's - * previous entries still in flight - the current journal entry - * might want to be written now: - */ - mod_delayed_work(j->wq, &j->write_work, max(0L, delta)); - } - - /* - * We don't typically trigger journal writes from her - the next journal - * write will be triggered immediately after the previous one is - * allocated, in bch2_journal_write() - but the journal write error path - * is special: - */ - bch2_journal_do_writes(j); - spin_unlock(&j->lock); - - if (do_discards) - bch2_do_discards(c); -} - -static void journal_write_endio(struct bio *bio) -{ - struct journal_bio *jbio = container_of(bio, struct journal_bio, bio); - struct bch_dev *ca = jbio->ca; - struct journal *j = &ca->fs->journal; - struct journal_buf *w = j->buf + jbio->buf_idx; - - bch2_account_io_completion(ca, BCH_MEMBER_ERROR_write, - jbio->submit_time, !bio->bi_status); - - if (bio->bi_status) { - bch_err_dev_ratelimited(ca, - "error writing journal entry %llu: %s", - le64_to_cpu(w->data->seq), - bch2_blk_status_to_str(bio->bi_status)); - - unsigned long flags; - spin_lock_irqsave(&j->err_lock, flags); - bch2_dev_list_drop_dev(&w->devs_written, ca->dev_idx); - spin_unlock_irqrestore(&j->err_lock, flags); - } - - closure_put(&w->io); - enumerated_ref_put(&ca->io_ref[WRITE], BCH_DEV_WRITE_REF_journal_write); -} - -static CLOSURE_CALLBACK(journal_write_submit) -{ - closure_type(w, struct journal_buf, io); - struct journal *j = container_of(w, struct journal, buf[w->idx]); - struct bch_fs *c = container_of(j, struct bch_fs, journal); - unsigned sectors = vstruct_sectors(w->data, c->block_bits); - - extent_for_each_ptr(bkey_i_to_s_extent(&w->key), ptr) { - struct bch_dev *ca = bch2_dev_have_ref(c, ptr->dev); - - this_cpu_add(ca->io_done->sectors[WRITE][BCH_DATA_journal], - sectors); - - struct journal_device *ja = &ca->journal; - struct journal_bio *jbio = ja->bio[w->idx]; - struct bio *bio = &jbio->bio; - - jbio->submit_time = local_clock(); - - bio_reset(bio, ca->disk_sb.bdev, REQ_OP_WRITE|REQ_SYNC|REQ_META); - bio->bi_iter.bi_sector = ptr->offset; - bio->bi_end_io = journal_write_endio; - bio->bi_private = ca; - bio->bi_ioprio = IOPRIO_PRIO_VALUE(IOPRIO_CLASS_RT, 0); - - BUG_ON(bio->bi_iter.bi_sector == ca->prev_journal_sector); - ca->prev_journal_sector = bio->bi_iter.bi_sector; - - if (!JSET_NO_FLUSH(w->data)) - bio->bi_opf |= REQ_FUA; - if (!JSET_NO_FLUSH(w->data) && !w->separate_flush) - bio->bi_opf |= REQ_PREFLUSH; - - bch2_bio_map(bio, w->data, sectors << 9); - - trace_and_count(c, journal_write, bio); - closure_bio_submit(bio, cl); - - ja->bucket_seq[ja->cur_idx] = le64_to_cpu(w->data->seq); - } - - continue_at(cl, journal_write_done, j->wq); -} - -static CLOSURE_CALLBACK(journal_write_preflush) -{ - closure_type(w, struct journal_buf, io); - struct journal *j = container_of(w, struct journal, buf[w->idx]); - struct bch_fs *c = container_of(j, struct bch_fs, journal); - - /* - * Wait for previous journal writes to comelete; they won't necessarily - * be flushed if they're still in flight - */ - if (j->seq_ondisk + 1 != le64_to_cpu(w->data->seq)) { - spin_lock(&j->lock); - if (j->seq_ondisk + 1 != le64_to_cpu(w->data->seq)) { - closure_wait(&j->async_wait, cl); - spin_unlock(&j->lock); - continue_at(cl, journal_write_preflush, j->wq); - return; - } - spin_unlock(&j->lock); - } - - if (w->separate_flush) { - for_each_rw_member(c, ca, BCH_DEV_WRITE_REF_journal_write) { - enumerated_ref_get(&ca->io_ref[WRITE], - BCH_DEV_WRITE_REF_journal_write); - - struct journal_device *ja = &ca->journal; - struct bio *bio = &ja->bio[w->idx]->bio; - bio_reset(bio, ca->disk_sb.bdev, - REQ_OP_WRITE|REQ_SYNC|REQ_META|REQ_PREFLUSH); - bio->bi_end_io = journal_write_endio; - bio->bi_private = ca; - closure_bio_submit(bio, cl); - } - - continue_at(cl, journal_write_submit, j->wq); - } else { - /* - * no need to punt to another work item if we're not waiting on - * preflushes - */ - journal_write_submit(&cl->work); - } -} - -static int bch2_journal_write_prep(struct journal *j, struct journal_buf *w) -{ - struct bch_fs *c = container_of(j, struct bch_fs, journal); - struct jset_entry *start, *end; - struct jset *jset = w->data; - struct journal_keys_to_wb wb = { NULL }; - unsigned u64s; - unsigned long btree_roots_have = 0; - u64 seq = le64_to_cpu(jset->seq); - int ret; - - /* - * Simple compaction, dropping empty jset_entries (from journal - * reservations that weren't fully used) and merging jset_entries that - * can be. - * - * If we wanted to be really fancy here, we could sort all the keys in - * the jset and drop keys that were overwritten - probably not worth it: - */ - vstruct_for_each(jset, i) { - unsigned u64s = le16_to_cpu(i->u64s); - - /* Empty entry: */ - if (!u64s) - continue; - - /* - * New btree roots are set by journalling them; when the journal - * entry gets written we have to propagate them to - * c->btree_roots - * - * But, every journal entry we write has to contain all the - * btree roots (at least for now); so after we copy btree roots - * to c->btree_roots we have to get any missing btree roots and - * add them to this journal entry: - */ - switch (i->type) { - case BCH_JSET_ENTRY_btree_root: - bch2_journal_entry_to_btree_root(c, i); - __set_bit(i->btree_id, &btree_roots_have); - break; - case BCH_JSET_ENTRY_write_buffer_keys: - EBUG_ON(!w->need_flush_to_write_buffer); - - if (!wb.wb) - bch2_journal_keys_to_write_buffer_start(c, &wb, seq); - - jset_entry_for_each_key(i, k) { - ret = bch2_journal_key_to_wb(c, &wb, i->btree_id, k); - if (ret) { - bch2_fs_fatal_error(c, "flushing journal keys to btree write buffer: %s", - bch2_err_str(ret)); - bch2_journal_keys_to_write_buffer_end(c, &wb); - return ret; - } - } - i->type = BCH_JSET_ENTRY_btree_keys; - break; - } - } - - if (wb.wb) { - ret = bch2_journal_keys_to_write_buffer_end(c, &wb); - if (ret) { - bch2_fs_fatal_error(c, "error flushing journal keys to btree write buffer: %s", - bch2_err_str(ret)); - return ret; - } - } - - spin_lock(&c->journal.lock); - w->need_flush_to_write_buffer = false; - spin_unlock(&c->journal.lock); - - start = end = vstruct_last(jset); - - end = bch2_btree_roots_to_journal_entries(c, end, btree_roots_have); - - struct jset_entry_datetime *d = - container_of(jset_entry_init(&end, sizeof(*d)), struct jset_entry_datetime, entry); - d->entry.type = BCH_JSET_ENTRY_datetime; - d->seconds = cpu_to_le64(ktime_get_real_seconds()); - - bch2_journal_super_entries_add_common(c, &end, seq); - u64s = (u64 *) end - (u64 *) start; - - WARN_ON(u64s > j->entry_u64s_reserved); - - le32_add_cpu(&jset->u64s, u64s); - - unsigned sectors = vstruct_sectors(jset, c->block_bits); - - if (sectors > w->sectors) { - bch2_fs_fatal_error(c, ": journal write overran available space, %zu > %u (extra %u reserved %u/%u)", - vstruct_bytes(jset), w->sectors << 9, - u64s, w->u64s_reserved, j->entry_u64s_reserved); - return -EINVAL; - } - - return 0; -} - -static int bch2_journal_write_checksum(struct journal *j, struct journal_buf *w) -{ - struct bch_fs *c = container_of(j, struct bch_fs, journal); - struct jset *jset = w->data; - u64 seq = le64_to_cpu(jset->seq); - bool validate_before_checksum = false; - int ret = 0; - - jset->magic = cpu_to_le64(jset_magic(c)); - jset->version = cpu_to_le32(c->sb.version); - - SET_JSET_BIG_ENDIAN(jset, CPU_BIG_ENDIAN); - SET_JSET_CSUM_TYPE(jset, bch2_meta_checksum_type(c)); - - if (!JSET_NO_FLUSH(jset) && journal_entry_empty(jset)) - j->last_empty_seq = seq; - - if (bch2_csum_type_is_encryption(JSET_CSUM_TYPE(jset))) - validate_before_checksum = true; - - if (le32_to_cpu(jset->version) < bcachefs_metadata_version_current) - validate_before_checksum = true; - - if (validate_before_checksum && - (ret = jset_validate(c, NULL, jset, 0, WRITE))) - return ret; - - ret = bch2_encrypt(c, JSET_CSUM_TYPE(jset), journal_nonce(jset), - jset->encrypted_start, - vstruct_end(jset) - (void *) jset->encrypted_start); - if (bch2_fs_fatal_err_on(ret, c, "encrypting journal entry: %s", bch2_err_str(ret))) - return ret; - - jset->csum = csum_vstruct(c, JSET_CSUM_TYPE(jset), - journal_nonce(jset), jset); - - if (!validate_before_checksum && - (ret = jset_validate(c, NULL, jset, 0, WRITE))) - return ret; - - unsigned sectors = vstruct_sectors(jset, c->block_bits); - unsigned bytes = vstruct_bytes(jset); - memset((void *) jset + bytes, 0, (sectors << 9) - bytes); - return 0; -} - -static int bch2_journal_write_pick_flush(struct journal *j, struct journal_buf *w) -{ - struct bch_fs *c = container_of(j, struct bch_fs, journal); - int error = bch2_journal_error(j); - - /* - * If the journal is in an error state - we did an emergency shutdown - - * we prefer to continue doing journal writes. We just mark them as - * noflush so they'll never be used, but they'll still be visible by the - * list_journal tool - this helps in debugging. - * - * There's a caveat: the first journal write after marking the - * superblock dirty must always be a flush write, because on startup - * from a clean shutdown we didn't necessarily read the journal and the - * new journal write might overwrite whatever was in the journal - * previously - we can't leave the journal without any flush writes in - * it. - * - * So if we're in an error state, and we're still starting up, we don't - * write anything at all. - */ - if (error && test_bit(JOURNAL_need_flush_write, &j->flags)) - return error; - - if (error || - w->noflush || - (!w->must_flush && - time_before(jiffies, j->last_flush_write + - msecs_to_jiffies(c->opts.journal_flush_delay)) && - test_bit(JOURNAL_may_skip_flush, &j->flags))) { - w->noflush = true; - SET_JSET_NO_FLUSH(w->data, true); - w->data->last_seq = 0; - w->last_seq = 0; - - j->nr_noflush_writes++; - } else { - w->must_flush = true; - j->last_flush_write = jiffies; - j->nr_flush_writes++; - clear_bit(JOURNAL_need_flush_write, &j->flags); - } - - return 0; -} - -CLOSURE_CALLBACK(bch2_journal_write) -{ - closure_type(w, struct journal_buf, io); - struct journal *j = container_of(w, struct journal, buf[w->idx]); - struct bch_fs *c = container_of(j, struct bch_fs, journal); - union bch_replicas_padded replicas; - unsigned nr_rw_members = dev_mask_nr(&c->rw_devs[BCH_DATA_free]); - int ret; - - BUG_ON(BCH_SB_CLEAN(c->disk_sb.sb)); - BUG_ON(!w->write_started); - BUG_ON(w->write_allocated); - BUG_ON(w->write_done); - - j->write_start_time = local_clock(); - - spin_lock(&j->lock); - if (nr_rw_members > 1) - w->separate_flush = true; - - ret = bch2_journal_write_pick_flush(j, w); - spin_unlock(&j->lock); - - if (unlikely(ret)) - goto err; - - mutex_lock(&j->buf_lock); - journal_buf_realloc(j, w); - - ret = bch2_journal_write_prep(j, w); - mutex_unlock(&j->buf_lock); - - if (unlikely(ret)) - goto err; - - unsigned replicas_allocated = 0; - while (1) { - ret = journal_write_alloc(j, w, &replicas_allocated); - if (!ret || !j->can_discard) - break; - - bch2_journal_do_discards(j); - } - - if (unlikely(ret)) - goto err_allocate_write; - - ret = bch2_journal_write_checksum(j, w); - if (unlikely(ret)) - goto err; - - spin_lock(&j->lock); - /* - * write is allocated, no longer need to account for it in - * bch2_journal_space_available(): - */ - w->sectors = 0; - w->write_allocated = true; - j->entry_bytes_written += vstruct_bytes(w->data); - - /* - * journal entry has been compacted and allocated, recalculate space - * available: - */ - bch2_journal_space_available(j); - bch2_journal_do_writes(j); - spin_unlock(&j->lock); - - w->devs_written = bch2_bkey_devs(bkey_i_to_s_c(&w->key)); - - /* - * Mark journal replicas before we submit the write to guarantee - * recovery will find the journal entries after a crash. - */ - bch2_devlist_to_replicas(&replicas.e, BCH_DATA_journal, - w->devs_written); - ret = bch2_mark_replicas(c, &replicas.e); - if (ret) - goto err; - - if (c->opts.nochanges) - goto no_io; - - if (!JSET_NO_FLUSH(w->data)) - continue_at(cl, journal_write_preflush, j->wq); - else - continue_at(cl, journal_write_submit, j->wq); - return; -err_allocate_write: - if (!bch2_journal_error(j)) { - struct printbuf buf = PRINTBUF; - - bch2_journal_debug_to_text(&buf, j); - prt_printf(&buf, bch2_fmt(c, "Unable to allocate journal write at seq %llu for %zu sectors: %s"), - le64_to_cpu(w->data->seq), - vstruct_sectors(w->data, c->block_bits), - bch2_err_str(ret)); - bch2_print_str(c, KERN_ERR, buf.buf); - printbuf_exit(&buf); - } -err: - bch2_fatal_error(c); -no_io: - extent_for_each_ptr(bkey_i_to_s_extent(&w->key), ptr) { - struct bch_dev *ca = bch2_dev_have_ref(c, ptr->dev); - enumerated_ref_put(&ca->io_ref[WRITE], BCH_DEV_WRITE_REF_journal_write); - } - - continue_at(cl, journal_write_done, j->wq); -} |