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![Kent Overstreet](/assets/img/avatar_default.png)
Make things easier when we're debugging long fsck runs - persist the work that successful recovery passes did. Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
246 lines
5.8 KiB
C
246 lines
5.8 KiB
C
// SPDX-License-Identifier: GPL-2.0
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#include "bcachefs.h"
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#include "alloc_background.h"
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#include "backpointers.h"
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#include "btree_gc.h"
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#include "btree_node_scan.h"
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#include "ec.h"
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#include "fsck.h"
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#include "inode.h"
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#include "journal.h"
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#include "lru.h"
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#include "logged_ops.h"
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#include "rebalance.h"
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#include "recovery.h"
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#include "recovery_passes.h"
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#include "snapshot.h"
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#include "subvolume.h"
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#include "super.h"
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#include "super-io.h"
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const char * const bch2_recovery_passes[] = {
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#define x(_fn, ...) #_fn,
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BCH_RECOVERY_PASSES()
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#undef x
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NULL
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};
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static int bch2_set_may_go_rw(struct bch_fs *c)
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{
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struct journal_keys *keys = &c->journal_keys;
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/*
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* After we go RW, the journal keys buffer can't be modified (except for
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* setting journal_key->overwritten: it will be accessed by multiple
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* threads
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*/
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move_gap(keys, keys->nr);
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set_bit(BCH_FS_may_go_rw, &c->flags);
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if (keys->nr || c->opts.fsck || !c->sb.clean || c->recovery_passes_explicit)
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return bch2_fs_read_write_early(c);
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return 0;
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}
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struct recovery_pass_fn {
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int (*fn)(struct bch_fs *);
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unsigned when;
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};
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static struct recovery_pass_fn recovery_pass_fns[] = {
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#define x(_fn, _id, _when) { .fn = bch2_##_fn, .when = _when },
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BCH_RECOVERY_PASSES()
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#undef x
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};
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static const u8 passes_to_stable_map[] = {
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#define x(n, id, ...) [BCH_RECOVERY_PASS_##n] = BCH_RECOVERY_PASS_STABLE_##n,
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BCH_RECOVERY_PASSES()
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#undef x
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};
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static enum bch_recovery_pass_stable bch2_recovery_pass_to_stable(enum bch_recovery_pass pass)
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{
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return passes_to_stable_map[pass];
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}
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u64 bch2_recovery_passes_to_stable(u64 v)
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{
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u64 ret = 0;
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for (unsigned i = 0; i < ARRAY_SIZE(passes_to_stable_map); i++)
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if (v & BIT_ULL(i))
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ret |= BIT_ULL(passes_to_stable_map[i]);
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return ret;
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}
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u64 bch2_recovery_passes_from_stable(u64 v)
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{
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static const u8 map[] = {
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#define x(n, id, ...) [BCH_RECOVERY_PASS_STABLE_##n] = BCH_RECOVERY_PASS_##n,
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BCH_RECOVERY_PASSES()
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#undef x
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};
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u64 ret = 0;
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for (unsigned i = 0; i < ARRAY_SIZE(map); i++)
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if (v & BIT_ULL(i))
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ret |= BIT_ULL(map[i]);
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return ret;
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}
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/*
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* For when we need to rewind recovery passes and run a pass we skipped:
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*/
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int bch2_run_explicit_recovery_pass(struct bch_fs *c,
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enum bch_recovery_pass pass)
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{
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if (c->recovery_passes_explicit & BIT_ULL(pass))
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return 0;
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bch_info(c, "running explicit recovery pass %s (%u), currently at %s (%u)",
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bch2_recovery_passes[pass], pass,
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bch2_recovery_passes[c->curr_recovery_pass], c->curr_recovery_pass);
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c->recovery_passes_explicit |= BIT_ULL(pass);
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if (c->curr_recovery_pass >= pass) {
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c->curr_recovery_pass = pass;
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c->recovery_passes_complete &= (1ULL << pass) >> 1;
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return -BCH_ERR_restart_recovery;
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} else {
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return 0;
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}
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}
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int bch2_run_explicit_recovery_pass_persistent(struct bch_fs *c,
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enum bch_recovery_pass pass)
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{
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enum bch_recovery_pass_stable s = bch2_recovery_pass_to_stable(pass);
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mutex_lock(&c->sb_lock);
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struct bch_sb_field_ext *ext = bch2_sb_field_get(c->disk_sb.sb, ext);
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if (!test_bit_le64(s, ext->recovery_passes_required)) {
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__set_bit_le64(s, ext->recovery_passes_required);
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bch2_write_super(c);
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}
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mutex_unlock(&c->sb_lock);
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return bch2_run_explicit_recovery_pass(c, pass);
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}
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static void bch2_clear_recovery_pass_required(struct bch_fs *c,
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enum bch_recovery_pass pass)
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{
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enum bch_recovery_pass_stable s = bch2_recovery_pass_to_stable(pass);
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mutex_lock(&c->sb_lock);
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struct bch_sb_field_ext *ext = bch2_sb_field_get(c->disk_sb.sb, ext);
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if (test_bit_le64(s, ext->recovery_passes_required)) {
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__clear_bit_le64(s, ext->recovery_passes_required);
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bch2_write_super(c);
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}
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mutex_unlock(&c->sb_lock);
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}
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u64 bch2_fsck_recovery_passes(void)
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{
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u64 ret = 0;
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for (unsigned i = 0; i < ARRAY_SIZE(recovery_pass_fns); i++)
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if (recovery_pass_fns[i].when & PASS_FSCK)
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ret |= BIT_ULL(i);
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return ret;
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}
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static bool should_run_recovery_pass(struct bch_fs *c, enum bch_recovery_pass pass)
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{
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struct recovery_pass_fn *p = recovery_pass_fns + pass;
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if (c->recovery_passes_explicit & BIT_ULL(pass))
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return true;
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if ((p->when & PASS_FSCK) && c->opts.fsck)
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return true;
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if ((p->when & PASS_UNCLEAN) && !c->sb.clean)
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return true;
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if (p->when & PASS_ALWAYS)
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return true;
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return false;
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}
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static int bch2_run_recovery_pass(struct bch_fs *c, enum bch_recovery_pass pass)
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{
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struct recovery_pass_fn *p = recovery_pass_fns + pass;
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int ret;
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if (!(p->when & PASS_SILENT))
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bch2_print(c, KERN_INFO bch2_log_msg(c, "%s..."),
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bch2_recovery_passes[pass]);
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ret = p->fn(c);
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if (ret)
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return ret;
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if (!(p->when & PASS_SILENT))
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bch2_print(c, KERN_CONT " done\n");
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return 0;
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}
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int bch2_run_online_recovery_passes(struct bch_fs *c)
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{
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int ret = 0;
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for (unsigned i = 0; i < ARRAY_SIZE(recovery_pass_fns); i++) {
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struct recovery_pass_fn *p = recovery_pass_fns + i;
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if (!(p->when & PASS_ONLINE))
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continue;
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ret = bch2_run_recovery_pass(c, i);
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if (bch2_err_matches(ret, BCH_ERR_restart_recovery)) {
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i = c->curr_recovery_pass;
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continue;
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}
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if (ret)
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break;
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}
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return ret;
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}
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int bch2_run_recovery_passes(struct bch_fs *c)
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{
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int ret = 0;
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while (c->curr_recovery_pass < ARRAY_SIZE(recovery_pass_fns)) {
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if (c->opts.recovery_pass_last &&
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c->curr_recovery_pass > c->opts.recovery_pass_last)
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break;
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if (should_run_recovery_pass(c, c->curr_recovery_pass)) {
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unsigned pass = c->curr_recovery_pass;
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ret = bch2_run_recovery_pass(c, c->curr_recovery_pass) ?:
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bch2_journal_flush(&c->journal);
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if (bch2_err_matches(ret, BCH_ERR_restart_recovery) ||
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(ret && c->curr_recovery_pass < pass))
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continue;
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if (ret)
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break;
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c->recovery_passes_complete |= BIT_ULL(c->curr_recovery_pass);
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}
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c->recovery_pass_done = max(c->recovery_pass_done, c->curr_recovery_pass);
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if (!test_bit(BCH_FS_error, &c->flags))
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bch2_clear_recovery_pass_required(c, c->curr_recovery_pass);
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c->curr_recovery_pass++;
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}
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return ret;
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}
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