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a850bde649
fsck_err() now optionally takes a btree_trans; if the current thread has one, it is required that it be passed. The next patch will use this to unlock when waiting for user input. Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
198 lines
5.0 KiB
C
198 lines
5.0 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 "btree_iter.h"
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#include "btree_update.h"
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#include "btree_write_buffer.h"
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#include "error.h"
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#include "lru.h"
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#include "recovery.h"
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/* KEY_TYPE_lru is obsolete: */
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int bch2_lru_invalid(struct bch_fs *c, struct bkey_s_c k,
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enum bch_validate_flags flags,
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struct printbuf *err)
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{
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int ret = 0;
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bkey_fsck_err_on(!lru_pos_time(k.k->p), c, err,
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lru_entry_at_time_0,
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"lru entry at time=0");
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fsck_err:
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return ret;
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}
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void bch2_lru_to_text(struct printbuf *out, struct bch_fs *c,
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struct bkey_s_c k)
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{
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const struct bch_lru *lru = bkey_s_c_to_lru(k).v;
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prt_printf(out, "idx %llu", le64_to_cpu(lru->idx));
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}
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void bch2_lru_pos_to_text(struct printbuf *out, struct bpos lru)
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{
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prt_printf(out, "%llu:%llu -> %llu:%llu",
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lru_pos_id(lru),
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lru_pos_time(lru),
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u64_to_bucket(lru.offset).inode,
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u64_to_bucket(lru.offset).offset);
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}
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static int __bch2_lru_set(struct btree_trans *trans, u16 lru_id,
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u64 dev_bucket, u64 time, bool set)
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{
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return time
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? bch2_btree_bit_mod_buffered(trans, BTREE_ID_lru,
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lru_pos(lru_id, dev_bucket, time), set)
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: 0;
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}
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int bch2_lru_del(struct btree_trans *trans, u16 lru_id, u64 dev_bucket, u64 time)
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{
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return __bch2_lru_set(trans, lru_id, dev_bucket, time, KEY_TYPE_deleted);
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}
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int bch2_lru_set(struct btree_trans *trans, u16 lru_id, u64 dev_bucket, u64 time)
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{
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return __bch2_lru_set(trans, lru_id, dev_bucket, time, KEY_TYPE_set);
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}
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int bch2_lru_change(struct btree_trans *trans,
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u16 lru_id, u64 dev_bucket,
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u64 old_time, u64 new_time)
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{
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if (old_time == new_time)
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return 0;
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return bch2_lru_del(trans, lru_id, dev_bucket, old_time) ?:
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bch2_lru_set(trans, lru_id, dev_bucket, new_time);
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}
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static const char * const bch2_lru_types[] = {
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#define x(n) #n,
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BCH_LRU_TYPES()
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#undef x
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NULL
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};
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int bch2_lru_check_set(struct btree_trans *trans,
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u16 lru_id, u64 time,
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struct bkey_s_c referring_k,
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struct bkey_buf *last_flushed)
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{
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struct bch_fs *c = trans->c;
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struct printbuf buf = PRINTBUF;
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struct btree_iter lru_iter;
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struct bkey_s_c lru_k =
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bch2_bkey_get_iter(trans, &lru_iter, BTREE_ID_lru,
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lru_pos(lru_id,
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bucket_to_u64(referring_k.k->p),
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time), 0);
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int ret = bkey_err(lru_k);
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if (ret)
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return ret;
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if (lru_k.k->type != KEY_TYPE_set) {
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ret = bch2_btree_write_buffer_maybe_flush(trans, referring_k, last_flushed);
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if (ret)
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goto err;
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if (fsck_err(trans, alloc_key_to_missing_lru_entry,
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"missing %s lru entry\n"
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" %s",
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bch2_lru_types[lru_type(lru_k)],
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(bch2_bkey_val_to_text(&buf, c, referring_k), buf.buf))) {
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ret = bch2_lru_set(trans, lru_id, bucket_to_u64(referring_k.k->p), time);
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if (ret)
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goto err;
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}
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}
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err:
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fsck_err:
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bch2_trans_iter_exit(trans, &lru_iter);
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printbuf_exit(&buf);
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return ret;
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}
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static int bch2_check_lru_key(struct btree_trans *trans,
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struct btree_iter *lru_iter,
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struct bkey_s_c lru_k,
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struct bpos *last_flushed_pos)
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{
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struct bch_fs *c = trans->c;
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struct btree_iter iter;
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struct bkey_s_c k;
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struct bch_alloc_v4 a_convert;
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const struct bch_alloc_v4 *a;
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struct printbuf buf1 = PRINTBUF;
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struct printbuf buf2 = PRINTBUF;
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enum bch_lru_type type = lru_type(lru_k);
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struct bpos alloc_pos = u64_to_bucket(lru_k.k->p.offset);
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u64 idx;
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int ret;
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if (fsck_err_on(!bch2_dev_bucket_exists(c, alloc_pos),
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trans, lru_entry_to_invalid_bucket,
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"lru key points to nonexistent device:bucket %llu:%llu",
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alloc_pos.inode, alloc_pos.offset))
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return bch2_btree_delete_at(trans, lru_iter, 0);
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k = bch2_bkey_get_iter(trans, &iter, BTREE_ID_alloc, alloc_pos, 0);
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ret = bkey_err(k);
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if (ret)
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goto err;
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a = bch2_alloc_to_v4(k, &a_convert);
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switch (type) {
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case BCH_LRU_read:
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idx = alloc_lru_idx_read(*a);
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break;
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case BCH_LRU_fragmentation:
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idx = a->fragmentation_lru;
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break;
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}
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if (lru_k.k->type != KEY_TYPE_set ||
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lru_pos_time(lru_k.k->p) != idx) {
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if (!bpos_eq(*last_flushed_pos, lru_k.k->p)) {
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*last_flushed_pos = lru_k.k->p;
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ret = bch2_btree_write_buffer_flush_sync(trans) ?:
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-BCH_ERR_transaction_restart_write_buffer_flush;
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goto out;
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}
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if (fsck_err(trans, lru_entry_bad,
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"incorrect lru entry: lru %s time %llu\n"
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" %s\n"
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" for %s",
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bch2_lru_types[type],
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lru_pos_time(lru_k.k->p),
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(bch2_bkey_val_to_text(&buf1, c, lru_k), buf1.buf),
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(bch2_bkey_val_to_text(&buf2, c, k), buf2.buf)))
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ret = bch2_btree_delete_at(trans, lru_iter, 0);
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}
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out:
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err:
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fsck_err:
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bch2_trans_iter_exit(trans, &iter);
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printbuf_exit(&buf2);
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printbuf_exit(&buf1);
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return ret;
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}
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int bch2_check_lrus(struct bch_fs *c)
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{
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struct bpos last_flushed_pos = POS_MIN;
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int ret = bch2_trans_run(c,
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for_each_btree_key_commit(trans, iter,
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BTREE_ID_lru, POS_MIN, BTREE_ITER_prefetch, k,
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NULL, NULL, BCH_TRANS_COMMIT_no_enospc|BCH_TRANS_COMMIT_lazy_rw,
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bch2_check_lru_key(trans, &iter, k, &last_flushed_pos)));
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bch_err_fn(c, ret);
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return ret;
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}
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