]> git.ozlabs.org Git - ccan/blobdiff - ccan/tdb2/check.c
tdb2: simplify logging levels, rename TDB_DEBUG_* to TDB_LOG_*
[ccan] / ccan / tdb2 / check.c
index c5450cccb0cd17d9e8ba248db18fb272b152023c..41acae4e9de3aa13616fadfdd6e6696c1030849f 100644 (file)
@@ -1,7 +1,7 @@
- /* 
+ /*
    Trivial Database 2: free list/block handling
    Copyright (C) Rusty Russell 2010
-   
+
    This library is free software; you can redistribute it and/or
    modify it under the terms of the GNU Lesser General Public
    License as published by the Free Software Foundation; either
@@ -43,25 +43,25 @@ static bool check_header(struct tdb_context *tdb, tdb_off_t *recovery)
        hash_test = TDB_HASH_MAGIC;
        hash_test = tdb_hash(tdb, &hash_test, sizeof(hash_test));
        if (hdr.hash_test != hash_test) {
-               tdb->log(tdb, TDB_DEBUG_ERROR, tdb->log_priv,
-                        "check: hash test %llu should be %llu\n",
-                        (long long)hdr.hash_test,
-                        (long long)hash_test);
+               tdb_logerr(tdb, TDB_ERR_CORRUPT, TDB_LOG_ERROR,
+                          "check: hash test %llu should be %llu",
+                          (long long)hdr.hash_test,
+                          (long long)hash_test);
                return false;
        }
 
        if (strcmp(hdr.magic_food, TDB_MAGIC_FOOD) != 0) {
-               tdb->log(tdb, TDB_DEBUG_ERROR, tdb->log_priv,
-                        "check: bad magic '%.*s'\n",
-                        (unsigned)sizeof(hdr.magic_food), hdr.magic_food);
+               tdb_logerr(tdb, TDB_ERR_CORRUPT, TDB_LOG_ERROR,
+                          "check: bad magic '%.*s'",
+                          (unsigned)sizeof(hdr.magic_food), hdr.magic_food);
                return false;
        }
 
        *recovery = hdr.recovery;
        if (*recovery) {
                if (*recovery < sizeof(hdr) || *recovery > tdb->map_size) {
-                       tdb->log(tdb, TDB_DEBUG_ERROR, tdb->log_priv,
-                                "tdb_check: invalid recovery offset %zu\n",
+                       tdb_logerr(tdb, TDB_ERR_CORRUPT, TDB_LOG_ERROR,
+                                "tdb_check: invalid recovery offset %zu",
                                 (size_t)*recovery);
                        return false;
                }
@@ -81,6 +81,62 @@ static bool check_hash_tree(struct tdb_context *tdb,
                            int (*check)(TDB_DATA, TDB_DATA, void *),
                            void *private_data);
 
+static bool check_hash_chain(struct tdb_context *tdb,
+                            tdb_off_t off,
+                            uint64_t hash,
+                            tdb_off_t used[],
+                            size_t num_used,
+                            size_t *num_found,
+                            int (*check)(TDB_DATA, TDB_DATA, void *),
+                            void *private_data)
+{
+       struct tdb_used_record rec;
+
+       if (tdb_read_convert(tdb, off, &rec, sizeof(rec)) == -1)
+               return false;
+
+       if (rec_magic(&rec) != TDB_CHAIN_MAGIC) {
+               tdb_logerr(tdb, TDB_ERR_CORRUPT, TDB_LOG_ERROR,
+                          "tdb_check: Bad hash chain magic %llu",
+                          (long long)rec_magic(&rec));
+               return false;
+       }
+
+       if (rec_data_length(&rec) != sizeof(struct tdb_chain)) {
+               tdb_logerr(tdb, TDB_ERR_CORRUPT, TDB_LOG_ERROR,
+                          "tdb_check: Bad hash chain length %llu vs %zu",
+                          (long long)rec_data_length(&rec),
+                          sizeof(struct tdb_chain));
+               return false;
+       }
+       if (rec_key_length(&rec) != 0) {
+               tdb_logerr(tdb, TDB_ERR_CORRUPT, TDB_LOG_ERROR,
+                        "tdb_check: Bad hash chain key length %llu",
+                        (long long)rec_key_length(&rec));
+               return false;
+       }
+       if (rec_hash(&rec) != 0) {
+               tdb_logerr(tdb, TDB_ERR_CORRUPT, TDB_LOG_ERROR,
+                        "tdb_check: Bad hash chain hash value %llu",
+                        (long long)rec_hash(&rec));
+               return false;
+       }
+
+       off += sizeof(rec);
+       if (!check_hash_tree(tdb, off, 0, hash, 64,
+                            used, num_used, num_found, check, private_data))
+               return false;
+
+       off = tdb_read_off(tdb, off + offsetof(struct tdb_chain, next));
+       if (off == TDB_OFF_ERR)
+               return false;
+       if (off == 0)
+               return true;
+       (*num_found)++;
+       return check_hash_chain(tdb, off, hash, used, num_used, num_found,
+                               check, private_data);
+}
+
 static bool check_hash_record(struct tdb_context *tdb,
                              tdb_off_t off,
                              uint64_t hprefix,
@@ -93,26 +149,37 @@ static bool check_hash_record(struct tdb_context *tdb,
 {
        struct tdb_used_record rec;
 
+       if (hprefix_bits >= 64)
+               return check_hash_chain(tdb, off, hprefix, used, num_used,
+                                       num_found, check, private_data);
+
        if (tdb_read_convert(tdb, off, &rec, sizeof(rec)) == -1)
                return false;
 
+       if (rec_magic(&rec) != TDB_HTABLE_MAGIC) {
+               tdb_logerr(tdb, TDB_ERR_CORRUPT, TDB_LOG_ERROR,
+                          "tdb_check: Bad hash table magic %llu",
+                          (long long)rec_magic(&rec));
+               return false;
+       }
        if (rec_data_length(&rec)
            != sizeof(tdb_off_t) << TDB_SUBLEVEL_HASH_BITS) {
-               tdb->log(tdb, TDB_DEBUG_ERROR, tdb->log_priv,
-                        "tdb_check: Bad hash table length %llu vs %llu\n",
-                        (long long)rec_data_length(&rec),
-                        (long long)sizeof(tdb_off_t)<<TDB_SUBLEVEL_HASH_BITS);
+               tdb_logerr(tdb, TDB_ERR_CORRUPT, TDB_LOG_ERROR,
+                          "tdb_check: Bad hash table length %llu vs %llu",
+                          (long long)rec_data_length(&rec),
+                          (long long)sizeof(tdb_off_t)
+                          << TDB_SUBLEVEL_HASH_BITS);
                return false;
        }
        if (rec_key_length(&rec) != 0) {
-               tdb->log(tdb, TDB_DEBUG_ERROR, tdb->log_priv,
-                        "tdb_check: Bad hash table key length %llu\n",
+               tdb_logerr(tdb, TDB_ERR_CORRUPT, TDB_LOG_ERROR,
+                        "tdb_check: Bad hash table key length %llu",
                         (long long)rec_key_length(&rec));
                return false;
        }
        if (rec_hash(&rec) != 0) {
-               tdb->log(tdb, TDB_DEBUG_ERROR, tdb->log_priv,
-                        "tdb_check: Bad hash table hash value %llu\n",
+               tdb_logerr(tdb, TDB_ERR_CORRUPT, TDB_LOG_ERROR,
+                        "tdb_check: Bad hash table hash value %llu",
                         (long long)rec_hash(&rec));
                return false;
        }
@@ -172,19 +239,45 @@ static bool check_hash_tree(struct tdb_context *tdb,
                        off = group[b] & TDB_OFF_MASK;
                        p = asearch(&off, used, num_used, off_cmp);
                        if (!p) {
-                               tdb->log(tdb, TDB_DEBUG_ERROR, tdb->log_priv,
-                                        "tdb_check: Invalid offset %llu "
-                                        "in hash\n",
-                                        (long long)off);
+                               tdb_logerr(tdb, TDB_ERR_CORRUPT,
+                                          TDB_LOG_ERROR,
+                                          "tdb_check: Invalid offset %llu "
+                                          "in hash", (long long)off);
                                goto fail;
                        }
                        /* Mark it invalid. */
                        *p ^= 1;
                        (*num_found)++;
 
+                       if (hprefix_bits == 64) {
+                               /* Chained entries are unordered. */
+                               if (is_subhash(group[b])) {
+                                       tdb_logerr(tdb, TDB_ERR_CORRUPT,
+                                                  TDB_LOG_ERROR,
+                                                  "tdb_check: Invalid chain"
+                                                  " entry subhash");
+                                       goto fail;
+                               }
+                               h = hash_record(tdb, off);
+                               if (h != hprefix) {
+                                       tdb_logerr(tdb, TDB_ERR_CORRUPT,
+                                                  TDB_LOG_ERROR,
+                                                  "check: bad hash chain"
+                                                  " placement"
+                                                  " 0x%llx vs 0x%llx",
+                                                  (long long)h,
+                                                  (long long)hprefix);
+                                       goto fail;
+                               }
+                               if (tdb_read_convert(tdb, off, &rec,
+                                                    sizeof(rec)))
+                                       goto fail;
+                               goto check;
+                       }
+
                        if (is_subhash(group[b])) {
                                uint64_t subprefix;
-                               subprefix = (hprefix 
+                               subprefix = (hprefix
                                     << (group_bits + TDB_HASH_GROUP_BITS))
                                        + g * (1 << TDB_HASH_GROUP_BITS) + b;
 
@@ -206,18 +299,20 @@ static bool check_hash_tree(struct tdb_context *tdb,
                        used_bits = 0;
                        if (get_bits(h, hprefix_bits, &used_bits) != hprefix
                            && hprefix_bits) {
-                               tdb->log(tdb, TDB_DEBUG_ERROR, tdb->log_priv,
-                                        "check: bad hash placement"
-                                        " 0x%llx vs 0x%llx\n",
+                               tdb_logerr(tdb, TDB_ERR_CORRUPT,
+                                          TDB_LOG_ERROR,
+                                          "check: bad hash placement"
+                                          " 0x%llx vs 0x%llx",
                                         (long long)h, (long long)hprefix);
                                goto fail;
                        }
 
                        /* Does it belong in this group? */
                        if (get_bits(h, group_bits, &used_bits) != g) {
-                               tdb->log(tdb, TDB_DEBUG_ERROR, tdb->log_priv,
-                                        "check: bad group %llu vs %u\n",
-                                        (long long)h, g);
+                               tdb_logerr(tdb, TDB_ERR_CORRUPT,
+                                          TDB_LOG_ERROR,
+                                          "check: bad group %llu vs %u",
+                                          (long long)h, g);
                                goto fail;
                        }
 
@@ -226,11 +321,12 @@ static bool check_hash_tree(struct tdb_context *tdb,
                        if (get_bits(h, TDB_HASH_GROUP_BITS, &used_bits)
                            != bucket) {
                                used_bits -= TDB_HASH_GROUP_BITS;
-                               tdb->log(tdb, TDB_DEBUG_ERROR, tdb->log_priv,
-                                        "check: bad bucket %u vs %u\n",
+                               tdb_logerr(tdb, TDB_ERR_CORRUPT,
+                                          TDB_LOG_ERROR,
+                                        "check: bad bucket %u vs %u",
                                         (unsigned)get_bits(h,
-                                                           TDB_HASH_GROUP_BITS,
-                                                           &used_bits),
+                                                       TDB_HASH_GROUP_BITS,
+                                                       &used_bits),
                                         bucket);
                                goto fail;
                        }
@@ -241,29 +337,31 @@ static bool check_hash_tree(struct tdb_context *tdb,
                             i != b;
                             i = (i + 1) % (1 << TDB_HASH_GROUP_BITS)) {
                                if (group[i] == 0) {
-                                       tdb->log(tdb, TDB_DEBUG_ERROR,
-                                                tdb->log_priv,
-                                                "check: bad group placement"
-                                                " %u vs %u\n",
-                                                b, bucket);
+                                       tdb_logerr(tdb, TDB_ERR_CORRUPT,
+                                                  TDB_LOG_ERROR,
+                                                  "check: bad group placement"
+                                                  " %u vs %u",
+                                                  b, bucket);
                                        goto fail;
                                }
                        }
 
-                       if (tdb_read_convert(tdb, off, &rec, sizeof(rec)) == -1)
+                       if (tdb_read_convert(tdb, off, &rec, sizeof(rec)))
                                goto fail;
 
                        /* Bottom bits must match header. */
                        if ((h & ((1 << 11)-1)) != rec_hash(&rec)) {
-                               tdb->log(tdb, TDB_DEBUG_ERROR, tdb->log_priv,
-                                        "tdb_check: Bad hash magic at"
-                                        " offset %llu (0x%llx vs 0x%llx)\n",
-                                        (long long)off,
-                                        (long long)h,
-                                        (long long)rec_hash(&rec));
+                               tdb_logerr(tdb, TDB_ERR_CORRUPT,
+                                          TDB_LOG_ERROR,
+                                          "tdb_check: Bad hash magic at"
+                                          " offset %llu (0x%llx vs 0x%llx)",
+                                          (long long)off,
+                                          (long long)h,
+                                          (long long)rec_hash(&rec));
                                goto fail;
                        }
 
+               check:
                        if (check) {
                                TDB_DATA key, data;
                                key.dsize = rec_key_length(&rec);
@@ -291,12 +389,12 @@ fail:
 
 static bool check_hash(struct tdb_context *tdb,
                       tdb_off_t used[],
-                      size_t num_used, size_t num_flists,
+                      size_t num_used, size_t num_ftables,
                       int (*check)(TDB_DATA, TDB_DATA, void *),
                       void *private_data)
 {
-       /* Free lists also show up as used. */
-       size_t num_found = num_flists;
+       /* Free tables also show up as used. */
+       size_t num_found = num_ftables;
 
        if (!check_hash_tree(tdb, offsetof(struct tdb_header, hashtable),
                             TDB_TOPLEVEL_HASH_BITS-TDB_HASH_GROUP_BITS,
@@ -305,8 +403,8 @@ static bool check_hash(struct tdb_context *tdb,
                return false;
 
        if (num_found != num_used) {
-               tdb->log(tdb, TDB_DEBUG_ERROR, tdb->log_priv,
-                        "tdb_check: Not all entries are in hash\n");
+               tdb_logerr(tdb, TDB_ERR_CORRUPT, TDB_LOG_ERROR,
+                          "tdb_check: Not all entries are in hash");
                return false;
        }
        return true;
@@ -315,62 +413,63 @@ static bool check_hash(struct tdb_context *tdb,
 static bool check_free(struct tdb_context *tdb,
                       tdb_off_t off,
                       const struct tdb_free_record *frec,
-                      tdb_off_t prev, tdb_off_t flist_off, unsigned int bucket)
+                      tdb_off_t prev, unsigned int ftable,
+                      unsigned int bucket)
 {
        if (frec_magic(frec) != TDB_FREE_MAGIC) {
-               tdb->log(tdb, TDB_DEBUG_ERROR, tdb->log_priv,
-                        "tdb_check: offset %llu bad magic 0x%llx\n",
-                        (long long)off, (long long)frec->magic_and_meta);
+               tdb_logerr(tdb, TDB_ERR_CORRUPT, TDB_LOG_ERROR,
+                          "tdb_check: offset %llu bad magic 0x%llx",
+                          (long long)off, (long long)frec->magic_and_prev);
                return false;
        }
-       if (frec_flist(frec) != flist_off) {
-               tdb->log(tdb, TDB_DEBUG_ERROR, tdb->log_priv,
-                        "tdb_check: offset %llu bad freelist 0x%llx\n",
-                        (long long)off, (long long)frec_flist(frec));
+       if (frec_ftable(frec) != ftable) {
+               tdb_logerr(tdb, TDB_ERR_CORRUPT, TDB_LOG_ERROR,
+                          "tdb_check: offset %llu bad freetable %u",
+                          (long long)off, frec_ftable(frec));
                return false;
        }
 
        if (tdb->methods->oob(tdb, off
-                             + frec->data_len+sizeof(struct tdb_used_record),
+                             + frec_len(frec) + sizeof(struct tdb_used_record),
                              false))
                return false;
-       if (size_to_bucket(frec->data_len) != bucket) {
-               tdb->log(tdb, TDB_DEBUG_ERROR, tdb->log_priv,
-                        "tdb_check: offset %llu in wrong bucket %u vs %u\n",
-                        (long long)off,
-                        bucket, size_to_bucket(frec->data_len));
+       if (size_to_bucket(frec_len(frec)) != bucket) {
+               tdb_logerr(tdb, TDB_ERR_CORRUPT, TDB_LOG_ERROR,
+                          "tdb_check: offset %llu in wrong bucket %u vs %u",
+                          (long long)off,
+                          bucket, size_to_bucket(frec_len(frec)));
                return false;
        }
-       if (prev != frec->prev) {
-               tdb->log(tdb, TDB_DEBUG_ERROR, tdb->log_priv,
-                        "tdb_check: offset %llu bad prev %llu vs %llu\n",
-                        (long long)off,
-                        (long long)prev, (long long)frec->prev);
+       if (prev != frec_prev(frec)) {
+               tdb_logerr(tdb, TDB_ERR_CORRUPT, TDB_LOG_ERROR,
+                          "tdb_check: offset %llu bad prev %llu vs %llu",
+                          (long long)off,
+                          (long long)prev, (long long)frec_len(frec));
                return false;
        }
        return true;
 }
-                      
-static bool check_free_list(struct tdb_context *tdb,
-                           tdb_off_t flist_off,
-                           tdb_off_t free[],
-                           size_t num_free,
-                           size_t *num_found)
+
+static bool check_free_table(struct tdb_context *tdb,
+                            tdb_off_t ftable_off,
+                            unsigned ftable_num,
+                            tdb_off_t fr[],
+                            size_t num_free,
+                            size_t *num_found)
 {
-       struct tdb_freelist flist;
+       struct tdb_freetable ft;
        tdb_off_t h;
        unsigned int i;
 
-       if (tdb_read_convert(tdb, flist_off, &flist, sizeof(flist)) == -1)
+       if (tdb_read_convert(tdb, ftable_off, &ft, sizeof(ft)) == -1)
                return false;
 
-       if (rec_magic(&flist.hdr) != TDB_MAGIC
-           || rec_key_length(&flist.hdr) != 0
-           || rec_data_length(&flist.hdr) != sizeof(flist) - sizeof(flist.hdr)
-           || rec_hash(&flist.hdr) != 1) {
-               tdb->log(tdb, TDB_DEBUG_ERROR,
-                        tdb->log_priv,
-                        "tdb_check: Invalid header on free list\n");
+       if (rec_magic(&ft.hdr) != TDB_FTABLE_MAGIC
+           || rec_key_length(&ft.hdr) != 0
+           || rec_data_length(&ft.hdr) != sizeof(ft) - sizeof(ft.hdr)
+           || rec_hash(&ft.hdr) != 0) {
+               tdb_logerr(tdb, TDB_ERR_CORRUPT, TDB_LOG_ERROR,
+                          "tdb_check: Invalid header on free table");
                return false;
        }
 
@@ -378,23 +477,23 @@ static bool check_free_list(struct tdb_context *tdb,
                tdb_off_t off, prev = 0, *p;
                struct tdb_free_record f;
 
-               h = bucket_off(flist_off, i);
+               h = bucket_off(ftable_off, i);
                for (off = tdb_read_off(tdb, h); off; off = f.next) {
                        if (off == TDB_OFF_ERR)
                                return false;
                        if (tdb_read_convert(tdb, off, &f, sizeof(f)))
                                return false;
-                       if (!check_free(tdb, off, &f, prev, flist_off, i))
+                       if (!check_free(tdb, off, &f, prev, ftable_num, i))
                                return false;
 
                        /* FIXME: Check hash bits */
-                       p = asearch(&off, free, num_free, off_cmp);
+                       p = asearch(&off, fr, num_free, off_cmp);
                        if (!p) {
-                               tdb->log(tdb, TDB_DEBUG_ERROR,
-                                        tdb->log_priv,
-                                        "tdb_check: Invalid offset"
-                                        " %llu in free table\n",
-                                        (long long)off);
+                               tdb_logerr(tdb, TDB_ERR_CORRUPT,
+                                          TDB_LOG_ERROR,
+                                          "tdb_check: Invalid offset"
+                                          " %llu in free table",
+                                          (long long)off);
                                return false;
                        }
                        /* Mark it invalid. */
@@ -413,7 +512,7 @@ size_t dead_space(struct tdb_context *tdb, tdb_off_t off)
 
        for (len = 0; off + len < tdb->map_size; len++) {
                char c;
-               if (tdb->methods->read(tdb, off, &c, 1))
+               if (tdb->methods->tread(tdb, off, &c, 1))
                        return 0;
                if (c != 0 && c != 0x43)
                        break;
@@ -423,7 +522,7 @@ size_t dead_space(struct tdb_context *tdb, tdb_off_t off)
 
 static bool check_linear(struct tdb_context *tdb,
                         tdb_off_t **used, size_t *num_used,
-                        tdb_off_t **free, size_t *num_free,
+                        tdb_off_t **fr, size_t *num_free,
                         tdb_off_t recovery)
 {
        tdb_off_t off;
@@ -435,100 +534,133 @@ static bool check_linear(struct tdb_context *tdb,
                        struct tdb_used_record u;
                        struct tdb_free_record f;
                        struct tdb_recovery_record r;
-               } pad, *p;
-               p = tdb_get(tdb, off, &pad, sizeof(pad));
-               if (!p)
+               } rec;
+               /* r is larger: only get that if we need to. */
+               if (tdb_read_convert(tdb, off, &rec, sizeof(rec.f)) == -1)
                        return false;
 
                /* If we crash after ftruncate, we can get zeroes or fill. */
-               if (p->r.magic == TDB_RECOVERY_INVALID_MAGIC
-                   || p->r.magic ==  0x4343434343434343ULL) {
+               if (rec.r.magic == TDB_RECOVERY_INVALID_MAGIC
+                   || rec.r.magic ==  0x4343434343434343ULL) {
+                       if (tdb_read_convert(tdb, off, &rec, sizeof(rec.r)))
+                               return false;
+
                        if (recovery == off) {
                                found_recovery = true;
-                               len = sizeof(p->r) + p->r.max_len;
+                               len = sizeof(rec.r) + rec.r.max_len;
                        } else {
                                len = dead_space(tdb, off);
-                               if (len < sizeof(p->r)) {
-                                       tdb->log(tdb, TDB_DEBUG_ERROR,
-                                                tdb->log_priv,
-                                                "tdb_check: invalid dead space"
-                                                " at %zu\n", (size_t)off);
+                               if (len < sizeof(rec.r)) {
+                                       tdb_logerr(tdb, TDB_ERR_CORRUPT,
+                                                  TDB_LOG_ERROR,
+                                                  "tdb_check: invalid dead"
+                                                  " space at %zu",
+                                                  (size_t)off);
                                        return false;
                                }
 
-                               tdb->log(tdb, TDB_DEBUG_WARNING, tdb->log_priv,
-                                        "Dead space at %zu-%zu (of %zu)\n",
-                                        (size_t)off, (size_t)(off + len),
-                                        (size_t)tdb->map_size);
+                               tdb_logerr(tdb, TDB_SUCCESS, TDB_LOG_WARNING,
+                                          "Dead space at %zu-%zu (of %zu)",
+                                          (size_t)off, (size_t)(off + len),
+                                          (size_t)tdb->map_size);
                        }
-               } else if (p->r.magic == TDB_RECOVERY_MAGIC) {
+               } else if (rec.r.magic == TDB_RECOVERY_MAGIC) {
+                       if (tdb_read_convert(tdb, off, &rec, sizeof(rec.r)))
+                               return false;
                        if (recovery != off) {
-                               tdb->log(tdb, TDB_DEBUG_ERROR, tdb->log_priv,
-                                        "tdb_check: unexpected recovery"
-                                        " record at offset %zu\n",
-                                        (size_t)off);
+                               tdb_logerr(tdb, TDB_ERR_CORRUPT,
+                                          TDB_LOG_ERROR,
+                                          "tdb_check: unexpected recovery"
+                                          " record at offset %zu",
+                                          (size_t)off);
+                               return false;
+                       }
+                       if (rec.r.len > rec.r.max_len) {
+                               tdb_logerr(tdb, TDB_ERR_CORRUPT,
+                                          TDB_LOG_ERROR,
+                                          "tdb_check: invalid recovery length"
+                                          " %zu", (size_t)rec.r.len);
+                               return false;
+                       }
+                       if (rec.r.eof > tdb->map_size) {
+                               tdb_logerr(tdb, TDB_ERR_CORRUPT,
+                                          TDB_LOG_ERROR,
+                                          "tdb_check: invalid old EOF"
+                                          " %zu", (size_t)rec.r.eof);
                                return false;
                        }
                        found_recovery = true;
-                       len = sizeof(p->r) + p->r.max_len;
-               } else if (frec_magic(&p->f) == TDB_FREE_MAGIC
-                          || frec_magic(&p->f) == TDB_COALESCING_MAGIC) {
-                       len = sizeof(p->u) + p->f.data_len;
+                       len = sizeof(rec.r) + rec.r.max_len;
+               } else if (frec_magic(&rec.f) == TDB_FREE_MAGIC) {
+                       len = sizeof(rec.u) + frec_len(&rec.f);
                        if (off + len > tdb->map_size) {
-                               tdb->log(tdb, TDB_DEBUG_ERROR, tdb->log_priv,
-                                        "tdb_check: free overlength %llu"
-                                        " at offset %llu\n",
-                                        (long long)len, (long long)off);
+                               tdb_logerr(tdb, TDB_ERR_CORRUPT,
+                                          TDB_LOG_ERROR,
+                                          "tdb_check: free overlength %llu"
+                                          " at offset %llu",
+                                          (long long)len, (long long)off);
                                return false;
                        }
-                       /* This record is free! */
-                       if (frec_magic(&p->f) == TDB_FREE_MAGIC
-                           && !append(free, num_free, off))
+                       /* This record should be in free lists. */
+                       if (frec_ftable(&rec.f) != TDB_FTABLE_NONE
+                           && !append(fr, num_free, off)) {
+                               tdb_logerr(tdb, TDB_ERR_OOM,
+                                          TDB_LOG_ERROR,
+                                          "tdb_check: tracking %zu'th"
+                                          " free record.", *num_free);
                                return false;
-               } else {
+                       }
+               } else if (rec_magic(&rec.u) == TDB_USED_MAGIC
+                          || rec_magic(&rec.u) == TDB_CHAIN_MAGIC
+                          || rec_magic(&rec.u) == TDB_HTABLE_MAGIC
+                          || rec_magic(&rec.u) == TDB_FTABLE_MAGIC) {
                        uint64_t klen, dlen, extra;
 
                        /* This record is used! */
-                       if (rec_magic(&p->u) != TDB_MAGIC) {
-                               tdb->log(tdb, TDB_DEBUG_ERROR, tdb->log_priv,
-                                        "tdb_check: Bad magic 0x%llx"
-                                        " at offset %llu\n",
-                                        (long long)rec_magic(&p->u),
-                                        (long long)off);
+                       if (!append(used, num_used, off)) {
+                               tdb_logerr(tdb, TDB_ERR_OOM,
+                                          TDB_LOG_ERROR,
+                                          "tdb_check: tracking %zu'th"
+                                          " used record.", *num_used);
                                return false;
                        }
 
-                       if (!append(used, num_used, off))
-                               return false;
-
-                       klen = rec_key_length(&p->u);
-                       dlen = rec_data_length(&p->u);
-                       extra = rec_extra_padding(&p->u);
+                       klen = rec_key_length(&rec.u);
+                       dlen = rec_data_length(&rec.u);
+                       extra = rec_extra_padding(&rec.u);
 
-                       len = sizeof(p->u) + klen + dlen + extra;
+                       len = sizeof(rec.u) + klen + dlen + extra;
                        if (off + len > tdb->map_size) {
-                               tdb->log(tdb, TDB_DEBUG_ERROR, tdb->log_priv,
-                                        "tdb_check: used overlength %llu"
-                                        " at offset %llu\n",
-                                        (long long)len, (long long)off);
+                               tdb_logerr(tdb, TDB_ERR_CORRUPT,
+                                          TDB_LOG_ERROR,
+                                          "tdb_check: used overlength %llu"
+                                          " at offset %llu",
+                                          (long long)len, (long long)off);
                                return false;
                        }
 
-                       if (len < sizeof(p->f)) {
-                               tdb->log(tdb, TDB_DEBUG_ERROR, tdb->log_priv,
-                                        "tdb_check: too short record %llu at"
-                                        " %llu\n",
-                                        (long long)len, (long long)off);
+                       if (len < sizeof(rec.f)) {
+                               tdb_logerr(tdb, TDB_ERR_CORRUPT,
+                                          TDB_LOG_ERROR,
+                                          "tdb_check: too short record %llu"
+                                          " at %llu",
+                                          (long long)len, (long long)off);
                                return false;
                        }
+               } else {
+                       tdb_logerr(tdb, TDB_ERR_CORRUPT,
+                                  TDB_LOG_ERROR,
+                                  "tdb_check: Bad magic 0x%llx at offset %zu",
+                                  (long long)rec_magic(&rec.u), (size_t)off);
+                       return false;
                }
        }
 
        /* We must have found recovery area if there was one. */
        if (recovery != 0 && !found_recovery) {
-               tdb->log(tdb, TDB_DEBUG_ERROR, tdb->log_priv,
-                        "tdb_check: expected a recovery area at %zu\n",
-                        (size_t)recovery);
+               tdb_logerr(tdb, TDB_ERR_CORRUPT, TDB_LOG_ERROR,
+                          "tdb_check: expected a recovery area at %zu",
+                          (size_t)recovery);
                return false;
        }
 
@@ -539,8 +671,8 @@ int tdb_check(struct tdb_context *tdb,
              int (*check)(TDB_DATA key, TDB_DATA data, void *private_data),
              void *private_data)
 {
-       tdb_off_t *free = NULL, *used = NULL, flist, recovery;
-       size_t num_free = 0, num_used = 0, num_found = 0, num_flists = 0;
+       tdb_off_t *fr = NULL, *used = NULL, ft, recovery;
+       size_t num_free = 0, num_used = 0, num_found = 0, num_ftables = 0;
 
        if (tdb_allrecord_lock(tdb, F_RDLCK, TDB_LOCK_WAIT, false) != 0)
                return -1;
@@ -554,32 +686,37 @@ int tdb_check(struct tdb_context *tdb,
                goto fail;
 
        /* First we do a linear scan, checking all records. */
-       if (!check_linear(tdb, &used, &num_used, &free, &num_free, recovery))
+       if (!check_linear(tdb, &used, &num_used, &fr, &num_free, recovery))
                goto fail;
 
-       for (flist = first_flist(tdb); flist; flist = next_flist(tdb, flist)) {
-               if (flist == TDB_OFF_ERR)
+       for (ft = first_ftable(tdb); ft; ft = next_ftable(tdb, ft)) {
+               if (ft == TDB_OFF_ERR)
                        goto fail;
-               if (!check_free_list(tdb, flist, free, num_free, &num_found))
+               if (!check_free_table(tdb, ft, num_ftables, fr, num_free,
+                                     &num_found))
                        goto fail;
-               num_flists++;
+               num_ftables++;
        }
 
        /* FIXME: Check key uniqueness? */
-       if (!check_hash(tdb, used, num_used, num_flists, check, private_data))
+       if (!check_hash(tdb, used, num_used, num_ftables, check, private_data))
                goto fail;
 
        if (num_found != num_free) {
-               tdb->log(tdb, TDB_DEBUG_ERROR, tdb->log_priv,
-                        "tdb_check: Not all entries are in free table\n");
+               tdb_logerr(tdb, TDB_ERR_CORRUPT, TDB_LOG_ERROR,
+                          "tdb_check: Not all entries are in free table");
                return -1;
        }
 
        tdb_allrecord_unlock(tdb, F_RDLCK);
        tdb_unlock_expand(tdb, F_RDLCK);
+       free(fr);
+       free(used);
        return 0;
 
 fail:
+       free(fr);
+       free(used);
        tdb_allrecord_unlock(tdb, F_RDLCK);
        tdb_unlock_expand(tdb, F_RDLCK);
        return -1;