+++ /dev/null
-// 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"
-
-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;
- kvpfree(i, offsetof(struct journal_replay, j) +
- vstruct_bytes(&i->j));
-}
-
-static void journal_replay_free(struct bch_fs *c, struct journal_replay *i)
-{
- i->ignore = 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;
- struct journal_ptr *ptr;
- size_t bytes = vstruct_bytes(j);
- u64 last_seq = !JSET_NO_FLUSH(j) ? le64_to_cpu(j->last_seq) : 0;
- int ret = JOURNAL_ENTRY_ADD_OK;
-
- /* 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 (!i || i->ignore)
- continue;
-
- if (le64_to_cpu(i->j.seq) >= last_seq)
- break;
- journal_replay_free(c, i);
- }
- }
-
- 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_ENOMEM_journal_entry_add;
-
- /*
- * Duplicate journal entries? If so we want the one that didn't have a
- * checksum error:
- */
- dup = *_i;
- if (dup) {
- if (bytes == vstruct_bytes(&dup->j) &&
- !memcmp(j, &dup->j, bytes)) {
- i = dup;
- goto found;
- }
-
- if (!entry_ptr.csum_good) {
- i = dup;
- goto found;
- }
-
- if (!dup->csum_good)
- goto replace;
-
- fsck_err(c, journal_entry_replicas_data_mismatch,
- "found duplicate but non identical journal entries (seq %llu)",
- le64_to_cpu(j->seq));
- i = dup;
- goto found;
- }
-replace:
- i = kvpmalloc(offsetof(struct journal_replay, j) + bytes, GFP_KERNEL);
- if (!i)
- return -BCH_ERR_ENOMEM_journal_entry_add;
-
- i->nr_ptrs = 0;
- i->csum_good = entry_ptr.csum_good;
- i->ignore = false;
- unsafe_memcpy(&i->j, j, bytes, "embedded variable length struct");
- i->ptrs[i->nr_ptrs++] = entry_ptr;
-
- if (dup) {
- if (dup->nr_ptrs >= ARRAY_SIZE(dup->ptrs)) {
- bch_err(c, "found too many copies of journal entry %llu",
- le64_to_cpu(i->j.seq));
- dup->nr_ptrs = ARRAY_SIZE(dup->ptrs) - 1;
- }
-
- /* The first ptr should represent the jset we kept: */
- memcpy(i->ptrs + i->nr_ptrs,
- dup->ptrs,
- sizeof(dup->ptrs[0]) * dup->nr_ptrs);
- i->nr_ptrs += dup->nr_ptrs;
- __journal_replay_free(c, dup);
- }
-
- *_i = i;
- return 0;
-found:
- for (ptr = i->ptrs; ptr < i->ptrs + i->nr_ptrs; ptr++) {
- if (ptr->dev == ca->dev_idx) {
- bch_err(c, "duplicate journal entry %llu on same device",
- le64_to_cpu(i->j.seq));
- goto out;
- }
- }
-
- if (i->nr_ptrs >= ARRAY_SIZE(i->ptrs)) {
- bch_err(c, "found too many copies of journal entry %llu",
- le64_to_cpu(i->j.seq));
- goto out;
- }
-
- i->ptrs[i->nr_ptrs++] = entry_ptr;
-out:
-fsck_err:
- 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=");
- prt_str(out, bch2_jset_entry_types[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 (flags & BKEY_INVALID_WRITE) { \
- case READ: \
- mustfix_fsck_err(c, _err, "%s", _buf.buf); \
- break; \
- case WRITE: \
- bch2_sb_error_count(c, BCH_FSCK_ERR_##_err); \
- bch_err(c, "corrupt metadata before write: %s\n", _buf.buf);\
- if (bch2_fs_inconsistent(c)) { \
- ret = -BCH_ERR_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,
- unsigned level, enum btree_id btree_id,
- struct bkey_i *k,
- unsigned version, int big_endian,
- enum bkey_invalid_flags flags)
-{
- int write = flags & BKEY_INVALID_WRITE;
- void *next = vstruct_next(entry);
- struct printbuf buf = PRINTBUF;
- 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(level, btree_id, version, big_endian,
- write, NULL, bkey_to_packed(k));
-
- if (bch2_bkey_invalid(c, bkey_i_to_s_c(k),
- __btree_node_type(level, btree_id), write, &buf)) {
- printbuf_reset(&buf);
- journal_entry_err_msg(&buf, version, jset, entry);
- prt_newline(&buf);
- printbuf_indent_add(&buf, 2);
-
- bch2_bkey_val_to_text(&buf, c, bkey_i_to_s_c(k));
- prt_newline(&buf);
- bch2_bkey_invalid(c, bkey_i_to_s_c(k),
- __btree_node_type(level, btree_id), write, &buf);
-
- mustfix_fsck_err(c, journal_entry_bkey_invalid,
- "%s", buf.buf);
-
- 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);
-
- printbuf_exit(&buf);
- return FSCK_DELETED_KEY;
- }
-
- if (write)
- bch2_bkey_compat(level, btree_id, version, big_endian,
- write, NULL, bkey_to_packed(k));
-fsck_err:
- printbuf_exit(&buf);
- 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,
- enum bkey_invalid_flags flags)
-{
- struct bkey_i *k = entry->start;
-
- while (k != vstruct_last(entry)) {
- int ret = journal_validate_key(c, jset, entry,
- entry->level,
- entry->btree_id,
- k, version, big_endian,
- flags|BKEY_INVALID_JOURNAL);
- if (ret == FSCK_DELETED_KEY)
- continue;
-
- 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)
-{
- struct bkey_i *k;
- bool first = true;
-
- jset_entry_for_each_key(entry, k) {
- if (!first) {
- prt_newline(out);
- prt_printf(out, "%s: ", bch2_jset_entry_types[entry->type]);
- }
- prt_printf(out, "btree=%s l=%u ", bch2_btree_id_str(entry->btree_id), entry->level);
- 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,
- enum bkey_invalid_flags flags)
-{
- struct bkey_i *k = entry->start;
- int ret = 0;
-
- 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, 1, entry->btree_id, k,
- version, big_endian, flags);
- 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,
- enum bkey_invalid_flags flags)
-{
- /* 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,
- enum bkey_invalid_flags flags)
-{
- 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,
- enum bkey_invalid_flags flags)
-{
- 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,
- enum bkey_invalid_flags flags)
-{
- 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_printf(out, "type=%s v=%llu",
- bch2_fs_usage_types[u->entry.btree_id],
- 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,
- enum bkey_invalid_flags flags)
-{
- 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->disk_sb.sb, &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,
- enum bkey_invalid_flags flags)
-{
- 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", clock->rw ? "write" : "read", 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,
- enum bkey_invalid_flags flags)
-{
- 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);
- unsigned dev;
- 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;
- }
-
- dev = le32_to_cpu(u->dev);
-
- if (journal_entry_err_on(!bch2_dev_exists2(c, dev),
- c, version, jset, entry,
- journal_entry_dev_usage_bad_dev,
- "bad dev")) {
- 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);
-
- prt_printf(out, "dev=%u", le32_to_cpu(u->dev));
-
- for (i = 0; i < nr_types; i++) {
- if (i < BCH_DATA_NR)
- prt_printf(out, " %s", bch2_data_types[i]);
- else
- prt_printf(out, " (unknown data type %u)", 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));
- }
-}
-
-static int journal_entry_log_validate(struct bch_fs *c,
- struct jset *jset,
- struct jset_entry *entry,
- unsigned version, int big_endian,
- enum bkey_invalid_flags flags)
-{
- 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);
- unsigned bytes = vstruct_bytes(entry) - offsetof(struct jset_entry_log, d);
-
- prt_printf(out, "%.*s", bytes, l->d);
-}
-
-static int journal_entry_overwrite_validate(struct bch_fs *c,
- struct jset *jset,
- struct jset_entry *entry,
- unsigned version, int big_endian,
- enum bkey_invalid_flags flags)
-{
- return journal_entry_btree_keys_validate(c, jset, entry,
- version, big_endian, READ);
-}
-
-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_write_buffer_keys_validate(struct bch_fs *c,
- struct jset *jset,
- struct jset_entry *entry,
- unsigned version, int big_endian,
- enum bkey_invalid_flags flags)
-{
- return journal_entry_btree_keys_validate(c, jset, entry,
- version, big_endian, READ);
-}
-
-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);
-}
-
-struct jset_entry_ops {
- int (*validate)(struct bch_fs *, struct jset *,
- struct jset_entry *, unsigned, int,
- enum bkey_invalid_flags);
- 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,
- enum bkey_invalid_flags flags)
-{
- return entry->type < BCH_JSET_ENTRY_NR
- ? bch2_jset_entry_ops[entry->type].validate(c, jset, entry,
- version, big_endian, flags)
- : 0;
-}
-
-void bch2_journal_entry_to_text(struct printbuf *out, struct bch_fs *c,
- struct jset_entry *entry)
-{
- if (entry->type < BCH_JSET_ENTRY_NR) {
- prt_printf(out, "%s: ", bch2_jset_entry_types[entry->type]);
- bch2_jset_entry_ops[entry->type].to_text(out, c, entry);
- } else {
- prt_printf(out, "(unknown type %u)", entry->type);
- }
-}
-
-static int jset_validate_entries(struct bch_fs *c, struct jset *jset,
- enum bkey_invalid_flags flags)
-{
- unsigned version = le32_to_cpu(jset->version);
- int ret = 0;
-
- vstruct_for_each(jset, entry) {
- 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), flags);
- 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 bkey_invalid_flags flags)
-{
- unsigned version;
- int ret = 0;
-
- if (le64_to_cpu(jset->magic) != jset_magic(c))
- return JOURNAL_ENTRY_NONE;
-
- 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)
-{
- size_t bytes = vstruct_bytes(jset);
- unsigned version;
- enum bkey_invalid_flags flags = BKEY_INVALID_JOURNAL;
- int ret = 0;
-
- if (le64_to_cpu(jset->magic) != jset_magic(c))
- return JOURNAL_ENTRY_NONE;
-
- 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;
- }
-
- 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 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_ENOMEM_journal_read_buf_realloc;
-
- new_size = roundup_pow_of_two(new_size);
- n = kvpmalloc(new_size, GFP_KERNEL);
- if (!n)
- return -BCH_ERR_ENOMEM_journal_read_buf_realloc;
-
- kvpfree(b->data, b->size);
- 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;
- struct printbuf err = PRINTBUF;
- 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);
- 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);
-
- ret = submit_bio_wait(bio);
- kfree(bio);
-
- if (bch2_dev_io_err_on(ret, ca, BCH_MEMBER_ERROR_read,
- "journal read error: sector %llu",
- offset) ||
- bch2_meta_read_fault("journal")) {
- /*
- * 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
- */
- goto out;
- }
-
- 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(buf,
- vstruct_bytes(j));
- if (ret)
- goto err;
- }
- goto reread;
- case JOURNAL_ENTRY_NONE:
- if (!saw_bad)
- goto out;
- /*
- * 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:
- goto err;
- }
-
- /*
- * 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])
- goto out;
-
- ja->bucket_seq[bucket] = le64_to_cpu(j->seq);
-
- enum bch_csum_type csum_type = JSET_CSUM_TYPE(j);
- struct bch_csum csum;
- csum_good = jset_csum_good(c, j, &csum);
-
- if (bch2_dev_io_err_on(!csum_good, ca, BCH_MEMBER_ERROR_checksum,
- "%s",
- (printbuf_reset(&err),
- prt_str(&err, "journal "),
- bch2_csum_err_msg(&err, csum_type, j->csum, csum),
- err.buf)))
- 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,
- "error 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,
- .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:
- goto err;
- }
-next_block:
- pr_debug("next");
- offset += sectors;
- sectors_read -= sectors;
- j = ((void *) j) + (sectors << 9);
- }
-
-out:
- ret = 0;
-err:
- printbuf_exit(&err);
- return ret;
-}
-
-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_replay *r, **_r;
- struct genradix_iter iter;
- struct journal_read_buf buf = { NULL, 0 };
- unsigned i;
- int ret = 0;
-
- if (!ja->nr)
- goto out;
-
- ret = journal_read_buf_realloc(&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;
- }
-
- ja->sectors_free = ca->mi.bucket_size;
-
- mutex_lock(&jlist->lock);
- genradix_for_each_reverse(&c->journal_entries, iter, _r) {
- r = *_r;
-
- if (!r)
- continue;
-
- for (i = 0; i < r->nr_ptrs; i++) {
- if (r->ptrs[i].dev == ca->dev_idx) {
- unsigned wrote = bucket_remainder(ca, r->ptrs[i].sector) +
- vstruct_sectors(&r->j, c->block_bits);
-
- ja->cur_idx = r->ptrs[i].bucket;
- ja->sectors_free = ca->mi.bucket_size - wrote;
- goto found;
- }
- }
- }
-found:
- mutex_unlock(&jlist->lock);
-
- if (ja->bucket_seq[ja->cur_idx] &&
- ja->sectors_free == ca->mi.bucket_size) {
-#if 0
- /*
- * Debug code for ZNS support, where we (probably) want to be
- * correlated where we stopped in the journal to the zone write
- * points:
- */
- bch_err(c, "ja->sectors_free == ca->mi.bucket_size");
- bch_err(c, "cur_idx %u/%u", ja->cur_idx, ja->nr);
- for (i = 0; i < 3; i++) {
- unsigned idx = (ja->cur_idx + ja->nr - 1 + i) % ja->nr;
-
- bch_err(c, "bucket_seq[%u] = %llu", idx, ja->bucket_seq[idx]);
- }
-#endif
- ja->sectors_free = 0;
- }
-
- /*
- * 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);
- kvpfree(buf.data, buf.size);
- percpu_ref_put(&ca->io_ref);
- closure_return(cl);
- return;
-err:
- mutex_lock(&jlist->lock);
- jlist->ret = ret;
- mutex_unlock(&jlist->lock);
- goto out;
-}
-
-void bch2_journal_ptrs_to_text(struct printbuf *out, struct bch_fs *c,
- struct journal_replay *j)
-{
- unsigned i;
-
- for (i = 0; i < j->nr_ptrs; i++) {
- struct bch_dev *ca = bch_dev_bkey_exists(c, j->ptrs[i].dev);
- u64 offset;
-
- div64_u64_rem(j->ptrs[i].sector, ca->mi.bucket_size, &offset);
-
- if (i)
- prt_printf(out, " ");
- prt_printf(out, "%u:%u:%u (sector %llu)",
- j->ptrs[i].dev,
- j->ptrs[i].bucket,
- j->ptrs[i].bucket_offset,
- j->ptrs[i].sector);
- }
-}
-
-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, *prev = NULL;
- 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) &&
- percpu_ref_tryget(&ca->io_ref))
- closure_call(&ca->journal.read,
- bch2_journal_read_device,
- system_unbound_wq,
- &jlist.cl);
- else
- degraded = true;
- }
-
- closure_sync(&jlist.cl);
-
- 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) {
- enum bkey_invalid_flags flags = BKEY_INVALID_JOURNAL;
-
- i = *_i;
-
- if (!i || i->ignore)
- continue;
-
- if (!*start_seq)
- *blacklist_seq = *start_seq = le64_to_cpu(i->j.seq) + 1;
-
- if (JSET_NO_FLUSH(&i->j)) {
- i->ignore = true;
- continue;
- }
-
- if (!last_write_torn && !i->csum_good) {
- last_write_torn = true;
- i->ignore = true;
- continue;
- }
-
- 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;
- }
-
- bch_info(c, "journal read done, replaying entries %llu-%llu",
- *last_seq, *blacklist_seq - 1);
-
- if (*start_seq != *blacklist_seq)
- bch_info(c, "dropped unflushed entries %llu-%llu",
- *blacklist_seq, *start_seq - 1);
-
- /* Drop blacklisted entries and entries older than last_seq: */
- genradix_for_each(&c->journal_entries, radix_iter, _i) {
- i = *_i;
-
- if (!i || i->ignore)
- continue;
-
- seq = le64_to_cpu(i->j.seq);
- if (seq < *last_seq) {
- journal_replay_free(c, i);
- 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 = true;
- }
- }
-
- /* Check for missing entries: */
- seq = *last_seq;
- genradix_for_each(&c->journal_entries, radix_iter, _i) {
- i = *_i;
-
- if (!i || i->ignore)
- continue;
-
- BUG_ON(seq > le64_to_cpu(i->j.seq));
-
- while (seq < le64_to_cpu(i->j.seq)) {
- u64 missing_start, missing_end;
- struct printbuf buf1 = PRINTBUF, buf2 = PRINTBUF;
-
- 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;
-
- missing_start = seq;
-
- while (seq < le64_to_cpu(i->j.seq) &&
- !bch2_journal_seq_is_blacklisted(c, seq, false))
- seq++;
-
- if (prev) {
- bch2_journal_ptrs_to_text(&buf1, c, prev);
- prt_printf(&buf1, " size %zu", vstruct_sectors(&prev->j, c->block_bits));
- } else
- prt_printf(&buf1, "(none)");
- bch2_journal_ptrs_to_text(&buf2, c, i);
-
- missing_end = seq - 1;
- fsck_err(c, journal_entries_missing,
- "journal entries %llu-%llu missing! (replaying %llu-%llu)\n"
- " prev at %s\n"
- " next at %s",
- missing_start, missing_end,
- *last_seq, *blacklist_seq - 1,
- buf1.buf, buf2.buf);
-
- printbuf_exit(&buf1);
- printbuf_exit(&buf2);
- }
-
- prev = i;
- seq++;
- }
-
- genradix_for_each(&c->journal_entries, radix_iter, _i) {
- struct bch_replicas_padded replicas = {
- .e.data_type = BCH_DATA_journal,
- .e.nr_required = 1,
- };
- unsigned ptr;
-
- i = *_i;
- if (!i || i->ignore)
- continue;
-
- for (ptr = 0; ptr < i->nr_ptrs; ptr++) {
- struct bch_dev *ca = bch_dev_bkey_exists(c, i->ptrs[ptr].dev);
-
- if (!i->ptrs[ptr].csum_good)
- bch_err_dev_offset(ca, i->ptrs[ptr].sector,
- "invalid journal checksum, seq %llu%s",
- le64_to_cpu(i->j.seq),
- i->csum_good ? " (had good copy on another device)" : "");
- }
-
- ret = jset_validate(c,
- bch_dev_bkey_exists(c, i->ptrs[0].dev),
- &i->j,
- i->ptrs[0].sector,
- READ);
- if (ret)
- goto err;
-
- for (ptr = 0; ptr < i->nr_ptrs; ptr++)
- replicas.e.devs[replicas.e.nr_devs++] = i->ptrs[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_write_alloc(struct journal *j,
- struct journal_buf *w,
- struct dev_alloc_list *devs_sorted,
- unsigned sectors,
- unsigned *replicas,
- unsigned replicas_want)
-{
- struct bch_fs *c = container_of(j, struct bch_fs, journal);
- struct journal_device *ja;
- struct bch_dev *ca;
- unsigned i;
-
- if (*replicas >= replicas_want)
- return;
-
- for (i = 0; i < devs_sorted->nr; i++) {
- ca = rcu_dereference(c->devs[devs_sorted->devs[i]]);
- if (!ca)
- continue;
-
- 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)
- 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;
- }
-}
-
-/**
- * journal_write_alloc - decide where to write next journal entry
- *
- * @j: journal object
- * @w: journal buf (entry to be written)
- *
- * Returns: 0 on success, or -EROFS on failure
- */
-static int journal_write_alloc(struct journal *j, struct journal_buf *w)
-{
- struct bch_fs *c = container_of(j, struct bch_fs, journal);
- struct bch_devs_mask devs;
- struct journal_device *ja;
- struct bch_dev *ca;
- 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 i, replicas = 0, replicas_want =
- READ_ONCE(c->opts.metadata_replicas);
-
- rcu_read_lock();
-retry:
- devs = target_rw_devs(c, BCH_DATA_journal, target);
-
- devs_sorted = bch2_dev_alloc_list(c, &j->wp.stripe, &devs);
-
- __journal_write_alloc(j, w, &devs_sorted,
- sectors, &replicas, replicas_want);
-
- if (replicas >= replicas_want)
- goto done;
-
- for (i = 0; i < devs_sorted.nr; i++) {
- ca = rcu_dereference(c->devs[devs_sorted.devs[i]]);
- if (!ca)
- continue;
-
- 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(w->data->seq);
- }
- }
-
- __journal_write_alloc(j, w, &devs_sorted,
- sectors, &replicas, replicas_want);
-
- if (replicas < replicas_want && target) {
- /* Retry from all devices: */
- target = 0;
- goto retry;
- }
-done:
- rcu_read_unlock();
-
- BUG_ON(bkey_val_u64s(&w->key.k) > BCH_REPLICAS_MAX);
-
- return replicas >= c->opts.metadata_replicas_required ? 0 : -EROFS;
-}
-
-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 = kvpmalloc(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);
-
- kvpfree(new_buf, new_size);
-}
-
-static inline struct journal_buf *journal_last_unwritten_buf(struct journal *j)
-{
- return j->buf + (journal_last_unwritten_seq(j) & JOURNAL_BUF_MASK);
-}
-
-static CLOSURE_CALLBACK(journal_write_done)
-{
- closure_type(j, struct journal, io);
- struct bch_fs *c = container_of(j, struct bch_fs, journal);
- struct journal_buf *w = journal_last_unwritten_buf(j);
- struct bch_replicas_padded replicas;
- union journal_res_state old, new;
- u64 v, 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) {
- bch_err(c, "unable to write journal to sufficient devices");
- err = -EIO;
- } else {
- bch2_devlist_to_replicas(&replicas.e, BCH_DATA_journal,
- w->devs_written);
- if (bch2_mark_replicas(c, &replicas.e))
- err = -EIO;
- }
-
- if (err)
- bch2_fatal_error(c);
-
- spin_lock(&j->lock);
- seq = le64_to_cpu(w->data->seq);
-
- if (seq >= j->pin.front)
- journal_seq_pin(j, seq)->devs = w->devs_written;
-
- if (!err) {
- if (!JSET_NO_FLUSH(w->data)) {
- j->flushed_seq_ondisk = seq;
- j->last_seq_ondisk = w->last_seq;
-
- bch2_do_discards(c);
- closure_wake_up(&c->freelist_wait);
-
- bch2_reset_alloc_cursors(c);
- }
- } else if (!j->err_seq || seq < j->err_seq)
- j->err_seq = seq;
-
- 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);
-
- /* also must come before signalling write completion: */
- closure_debug_destroy(cl);
-
- v = atomic64_read(&j->reservations.counter);
- do {
- old.v = new.v = v;
- BUG_ON(journal_state_count(new, new.unwritten_idx));
-
- new.unwritten_idx++;
- } while ((v = atomic64_cmpxchg(&j->reservations.counter,
- old.v, new.v)) != old.v);
-
- bch2_journal_reclaim_fast(j);
- bch2_journal_space_available(j);
-
- track_event_change(&c->times[BCH_TIME_blocked_journal_max_in_flight],
- &j->max_in_flight_start, false);
-
- closure_wake_up(&w->wait);
- journal_wake(j);
-
- if (!journal_state_count(new, new.unwritten_idx) &&
- journal_last_unwritten_seq(j) <= journal_cur_seq(j)) {
- spin_unlock(&j->lock);
- closure_call(&j->io, bch2_journal_write, c->io_complete_wq, NULL);
- } else if (journal_last_unwritten_seq(j) == journal_cur_seq(j) &&
- new.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:
- */
-
- spin_unlock(&j->lock);
- mod_delayed_work(c->io_complete_wq, &j->write_work, max(0L, delta));
- } else {
- spin_unlock(&j->lock);
- }
-}
-
-static void journal_write_endio(struct bio *bio)
-{
- struct bch_dev *ca = bio->bi_private;
- struct journal *j = &ca->fs->journal;
- struct journal_buf *w = journal_last_unwritten_buf(j);
- unsigned long flags;
-
- if (bch2_dev_io_err_on(bio->bi_status, ca, BCH_MEMBER_ERROR_write,
- "error writing journal entry %llu: %s",
- le64_to_cpu(w->data->seq),
- bch2_blk_status_to_str(bio->bi_status)) ||
- bch2_meta_write_fault("journal")) {
- 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(&j->io);
- percpu_ref_put(&ca->io_ref);
-}
-
-static CLOSURE_CALLBACK(do_journal_write)
-{
- closure_type(j, struct journal, io);
- struct bch_fs *c = container_of(j, struct bch_fs, journal);
- struct bch_dev *ca;
- struct journal_buf *w = journal_last_unwritten_buf(j);
- struct bio *bio;
- unsigned sectors = vstruct_sectors(w->data, c->block_bits);
-
- extent_for_each_ptr(bkey_i_to_s_extent(&w->key), ptr) {
- ca = bch_dev_bkey_exists(c, ptr->dev);
- if (!percpu_ref_tryget(&ca->io_ref)) {
- /* XXX: fix this */
- bch_err(c, "missing device for journal write\n");
- continue;
- }
-
- this_cpu_add(ca->io_done->sectors[WRITE][BCH_DATA_journal],
- sectors);
-
- bio = ca->journal.bio;
- 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;
-
- 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);
-
- ca->journal.bucket_seq[ca->journal.cur_idx] =
- le64_to_cpu(w->data->seq);
- }
-
- continue_at(cl, journal_write_done, c->io_complete_wq);
-}
-
-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 sectors, bytes, u64s;
- unsigned long btree_roots_have = 0;
- bool validate_before_checksum = false;
- 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);
-
- struct bkey_i *k;
- 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, "-ENOMEM flushing journal keys to btree write buffer");
- bch2_journal_keys_to_write_buffer_end(c, &wb);
- return ret;
- }
- }
- i->type = BCH_JSET_ENTRY_btree_keys;
- break;
- }
- }
-
- if (wb.wb)
- bch2_journal_keys_to_write_buffer_end(c, &wb);
- w->need_flush_to_write_buffer = false;
-
- start = end = vstruct_last(jset);
-
- end = bch2_btree_roots_to_journal_entries(c, end, btree_roots_have);
-
- bch2_journal_super_entries_add_common(c, &end, seq);
- u64s = (u64 *) end - (u64 *) start;
- BUG_ON(u64s > j->entry_u64s_reserved);
-
- le32_add_cpu(&jset->u64s, u64s);
-
- sectors = vstruct_sectors(jset, c->block_bits);
- bytes = vstruct_bytes(jset);
-
- if (sectors > w->sectors) {
- bch2_fs_fatal_error(c, "aieeee! 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;
- }
-
- 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,
- "error decrypting journal entry: %i", 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;
-
- 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 -EIO;
-
- if (error ||
- w->noflush ||
- (!w->must_flush &&
- (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 {
- 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(j, struct journal, io);
- struct bch_fs *c = container_of(j, struct bch_fs, journal);
- struct journal_buf *w = journal_last_unwritten_buf(j);
- struct bch_replicas_padded replicas;
- struct bio *bio;
- struct printbuf journal_debug_buf = PRINTBUF;
- unsigned nr_rw_members = 0;
- int ret;
-
- BUG_ON(BCH_SB_CLEAN(c->disk_sb.sb));
-
- j->write_start_time = local_clock();
-
- spin_lock(&j->lock);
- ret = bch2_journal_write_pick_flush(j, w);
- spin_unlock(&j->lock);
- if (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 (ret)
- goto err;
-
- j->entry_bytes_written += vstruct_bytes(w->data);
-
- while (1) {
- spin_lock(&j->lock);
- ret = journal_write_alloc(j, w);
- if (!ret || !j->can_discard)
- break;
-
- spin_unlock(&j->lock);
- bch2_journal_do_discards(j);
- }
-
- if (ret) {
- __bch2_journal_debug_to_text(&journal_debug_buf, j);
- spin_unlock(&j->lock);
- bch_err(c, "Unable to allocate journal write:\n%s",
- journal_debug_buf.buf);
- printbuf_exit(&journal_debug_buf);
- goto err;
- }
-
- /*
- * write is allocated, no longer need to account for it in
- * bch2_journal_space_available():
- */
- w->sectors = 0;
-
- /*
- * journal entry has been compacted and allocated, recalculate space
- * available:
- */
- bch2_journal_space_available(j);
- spin_unlock(&j->lock);
-
- w->devs_written = bch2_bkey_devs(bkey_i_to_s_c(&w->key));
-
- if (c->opts.nochanges)
- goto no_io;
-
- for_each_rw_member(c, ca)
- nr_rw_members++;
-
- if (nr_rw_members > 1)
- w->separate_flush = true;
-
- /*
- * 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 (!JSET_NO_FLUSH(w->data) && w->separate_flush) {
- for_each_rw_member(c, ca) {
- percpu_ref_get(&ca->io_ref);
-
- bio = ca->journal.bio;
- bio_reset(bio, ca->disk_sb.bdev, REQ_OP_FLUSH);
- bio->bi_end_io = journal_write_endio;
- bio->bi_private = ca;
- closure_bio_submit(bio, cl);
- }
- }
-
- continue_at(cl, do_journal_write, c->io_complete_wq);
- return;
-no_io:
- continue_at(cl, journal_write_done, c->io_complete_wq);
- return;
-err:
- bch2_fatal_error(c);
- continue_at(cl, journal_write_done, c->io_complete_wq);
-}
projects / bcachefs-tools-debian / blobdiff