+++ /dev/null
- /*
- 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
- version 3 of the License, or (at your option) any later version.
-
- This library is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- Lesser General Public License for more details.
-
- You should have received a copy of the GNU Lesser General Public
- License along with this library; if not, see <http://www.gnu.org/licenses/>.
-*/
-#include "private.h"
-#include <ccan/likely/likely.h>
-#include <ccan/asearch/asearch.h>
-
-/* We keep an ordered array of offsets. */
-static bool append(struct ntdb_context *ntdb,
- ntdb_off_t **arr, size_t *num, ntdb_off_t off)
-{
- ntdb_off_t *new;
-
- if (*num == 0) {
- new = ntdb->alloc_fn(ntdb, sizeof(ntdb_off_t), ntdb->alloc_data);
- } else {
- new = ntdb->expand_fn(*arr, (*num + 1) * sizeof(ntdb_off_t),
- ntdb->alloc_data);
- }
- if (!new)
- return false;
- new[(*num)++] = off;
- *arr = new;
- return true;
-}
-
-static enum NTDB_ERROR check_header(struct ntdb_context *ntdb,
- ntdb_off_t *recovery,
- uint64_t *features,
- size_t *num_capabilities)
-{
- uint64_t hash_test;
- struct ntdb_header hdr;
- enum NTDB_ERROR ecode;
- ntdb_off_t off, next;
-
- ecode = ntdb_read_convert(ntdb, 0, &hdr, sizeof(hdr));
- if (ecode != NTDB_SUCCESS) {
- return ecode;
- }
- /* magic food should not be converted, so convert back. */
- ntdb_convert(ntdb, hdr.magic_food, sizeof(hdr.magic_food));
-
- hash_test = NTDB_HASH_MAGIC;
- hash_test = ntdb_hash(ntdb, &hash_test, sizeof(hash_test));
- if (hdr.hash_test != hash_test) {
- return ntdb_logerr(ntdb, NTDB_ERR_CORRUPT, NTDB_LOG_ERROR,
- "check: hash test %llu should be %llu",
- (long long)hdr.hash_test,
- (long long)hash_test);
- }
-
- if (strcmp(hdr.magic_food, NTDB_MAGIC_FOOD) != 0) {
- return ntdb_logerr(ntdb, NTDB_ERR_CORRUPT, NTDB_LOG_ERROR,
- "check: bad magic '%.*s'",
- (unsigned)sizeof(hdr.magic_food),
- hdr.magic_food);
- }
-
- /* Features which are used must be a subset of features offered. */
- if (hdr.features_used & ~hdr.features_offered) {
- return ntdb_logerr(ntdb, NTDB_ERR_CORRUPT, NTDB_LOG_ERROR,
- "check: features used (0x%llx) which"
- " are not offered (0x%llx)",
- (long long)hdr.features_used,
- (long long)hdr.features_offered);
- }
-
- *features = hdr.features_offered;
- *recovery = hdr.recovery;
- if (*recovery) {
- if (*recovery < sizeof(hdr)
- || *recovery > ntdb->file->map_size) {
- return ntdb_logerr(ntdb, NTDB_ERR_CORRUPT, NTDB_LOG_ERROR,
- "ntdb_check:"
- " invalid recovery offset %zu",
- (size_t)*recovery);
- }
- }
-
- for (off = hdr.capabilities; off && ecode == NTDB_SUCCESS; off = next) {
- const struct ntdb_capability *cap;
- enum NTDB_ERROR e;
-
- cap = ntdb_access_read(ntdb, off, sizeof(*cap), true);
- if (NTDB_PTR_IS_ERR(cap)) {
- return NTDB_PTR_ERR(cap);
- }
-
- /* All capabilities are unknown. */
- e = unknown_capability(ntdb, "ntdb_check", cap->type);
- next = cap->next;
- ntdb_access_release(ntdb, cap);
- if (e)
- return e;
- (*num_capabilities)++;
- }
-
- /* Don't check reserved: they *can* be used later. */
- return NTDB_SUCCESS;
-}
-
-static int off_cmp(const ntdb_off_t *a, const ntdb_off_t *b, void *ctx)
-{
- /* Can overflow an int. */
- return *a > *b ? 1
- : *a < *b ? -1
- : 0;
-}
-
-static enum NTDB_ERROR check_entry(struct ntdb_context *ntdb,
- ntdb_off_t off_and_hash,
- ntdb_len_t bucket,
- ntdb_off_t used[],
- size_t num_used,
- size_t *num_found,
- enum NTDB_ERROR (*check)(NTDB_DATA,
- NTDB_DATA,
- void *),
- void *data)
-{
- enum NTDB_ERROR ecode;
- const struct ntdb_used_record *r;
- const unsigned char *kptr;
- ntdb_len_t klen, dlen;
- uint32_t hash;
- ntdb_off_t off = off_and_hash & NTDB_OFF_MASK;
- ntdb_off_t *p;
-
- /* Empty bucket is fine. */
- if (!off_and_hash) {
- return NTDB_SUCCESS;
- }
-
- /* This can't point to a chain, we handled those at toplevel. */
- if (off_and_hash & (1ULL << NTDB_OFF_CHAIN_BIT)) {
- return ntdb_logerr(ntdb, NTDB_ERR_CORRUPT, NTDB_LOG_ERROR,
- "ntdb_check: Invalid chain bit in offset "
- " %llu", (long long)off_and_hash);
- }
-
- p = asearch(&off, used, num_used, off_cmp, NULL);
- if (!p) {
- return ntdb_logerr(ntdb, NTDB_ERR_CORRUPT, NTDB_LOG_ERROR,
- "ntdb_check: Invalid offset"
- " %llu in hash", (long long)off);
- }
- /* Mark it invalid. */
- *p ^= 1;
- (*num_found)++;
-
- r = ntdb_access_read(ntdb, off, sizeof(*r), true);
- if (NTDB_PTR_IS_ERR(r)) {
- return NTDB_PTR_ERR(r);
- }
- klen = rec_key_length(r);
- dlen = rec_data_length(r);
- ntdb_access_release(ntdb, r);
-
- kptr = ntdb_access_read(ntdb, off + sizeof(*r), klen + dlen, false);
- if (NTDB_PTR_IS_ERR(kptr)) {
- return NTDB_PTR_ERR(kptr);
- }
-
- hash = ntdb_hash(ntdb, kptr, klen);
-
- /* Are we in the right chain? */
- if (bits_from(hash, 0, ntdb->hash_bits) != bucket) {
- ecode = ntdb_logerr(ntdb, NTDB_ERR_CORRUPT,
- NTDB_LOG_ERROR,
- "ntdb_check: Bad bucket %u vs %llu",
- bits_from(hash, 0, ntdb->hash_bits),
- (long long)bucket);
- /* Next 8 bits should be the same as top bits of bucket. */
- } else if (bits_from(hash, ntdb->hash_bits, NTDB_OFF_UPPER_STEAL)
- != bits_from(off_and_hash, 64-NTDB_OFF_UPPER_STEAL,
- NTDB_OFF_UPPER_STEAL)) {
- ecode = ntdb_logerr(ntdb, NTDB_ERR_CORRUPT,
- NTDB_LOG_ERROR,
- "ntdb_check: Bad hash bits %llu vs %llu",
- (long long)off_and_hash,
- (long long)hash);
- } else if (check) {
- NTDB_DATA k, d;
-
- k = ntdb_mkdata(kptr, klen);
- d = ntdb_mkdata(kptr + klen, dlen);
- ecode = check(k, d, data);
- } else {
- ecode = NTDB_SUCCESS;
- }
- ntdb_access_release(ntdb, kptr);
-
- return ecode;
-}
-
-static enum NTDB_ERROR check_hash_chain(struct ntdb_context *ntdb,
- ntdb_off_t off,
- ntdb_len_t bucket,
- ntdb_off_t used[],
- size_t num_used,
- size_t *num_found,
- enum NTDB_ERROR (*check)(NTDB_DATA,
- NTDB_DATA,
- void *),
- void *data)
-{
- struct ntdb_used_record rec;
- enum NTDB_ERROR ecode;
- const ntdb_off_t *entries;
- ntdb_len_t i, num;
-
- /* This is a used entry. */
- (*num_found)++;
-
- ecode = ntdb_read_convert(ntdb, off, &rec, sizeof(rec));
- if (ecode != NTDB_SUCCESS) {
- return ecode;
- }
-
- if (rec_magic(&rec) != NTDB_CHAIN_MAGIC) {
- return ntdb_logerr(ntdb, NTDB_ERR_CORRUPT, NTDB_LOG_ERROR,
- "ntdb_check: Bad hash chain magic %llu",
- (long long)rec_magic(&rec));
- }
-
- if (rec_data_length(&rec) % sizeof(ntdb_off_t)) {
- return ntdb_logerr(ntdb, NTDB_ERR_CORRUPT, NTDB_LOG_ERROR,
- "ntdb_check: Bad hash chain data length %llu",
- (long long)rec_data_length(&rec));
- }
-
- if (rec_key_length(&rec) != 0) {
- return ntdb_logerr(ntdb, NTDB_ERR_CORRUPT, NTDB_LOG_ERROR,
- "ntdb_check: Bad hash chain key length %llu",
- (long long)rec_key_length(&rec));
- }
-
- off += sizeof(rec);
- num = rec_data_length(&rec) / sizeof(ntdb_off_t);
- entries = ntdb_access_read(ntdb, off, rec_data_length(&rec), true);
- if (NTDB_PTR_IS_ERR(entries)) {
- return NTDB_PTR_ERR(entries);
- }
-
- /* Check each non-deleted entry in chain. */
- for (i = 0; i < num; i++) {
- ecode = check_entry(ntdb, entries[i], bucket,
- used, num_used, num_found, check, data);
- if (ecode) {
- break;
- }
- }
-
- ntdb_access_release(ntdb, entries);
- return ecode;
-}
-
-static enum NTDB_ERROR check_hash(struct ntdb_context *ntdb,
- ntdb_off_t used[],
- size_t num_used,
- size_t num_other_used,
- enum NTDB_ERROR (*check)(NTDB_DATA,
- NTDB_DATA,
- void *),
- void *data)
-{
- enum NTDB_ERROR ecode;
- struct ntdb_used_record rec;
- const ntdb_off_t *entries;
- ntdb_len_t i;
- /* Free tables and capabilities also show up as used, as do we. */
- size_t num_found = num_other_used + 1;
-
- ecode = ntdb_read_convert(ntdb, NTDB_HASH_OFFSET, &rec, sizeof(rec));
- if (ecode != NTDB_SUCCESS) {
- return ecode;
- }
-
- if (rec_magic(&rec) != NTDB_HTABLE_MAGIC) {
- return ntdb_logerr(ntdb, NTDB_ERR_CORRUPT, NTDB_LOG_ERROR,
- "ntdb_check: Bad hash table magic %llu",
- (long long)rec_magic(&rec));
- }
-
- if (rec_data_length(&rec) != (sizeof(ntdb_off_t) << ntdb->hash_bits)) {
- return ntdb_logerr(ntdb, NTDB_ERR_CORRUPT, NTDB_LOG_ERROR,
- "ntdb_check: Bad hash table data length %llu",
- (long long)rec_data_length(&rec));
- }
-
- if (rec_key_length(&rec) != 0) {
- return ntdb_logerr(ntdb, NTDB_ERR_CORRUPT, NTDB_LOG_ERROR,
- "ntdb_check: Bad hash table key length %llu",
- (long long)rec_key_length(&rec));
- }
-
- entries = ntdb_access_read(ntdb, NTDB_HASH_OFFSET + sizeof(rec),
- rec_data_length(&rec), true);
- if (NTDB_PTR_IS_ERR(entries)) {
- return NTDB_PTR_ERR(entries);
- }
-
- for (i = 0; i < (1 << ntdb->hash_bits); i++) {
- ntdb_off_t off = entries[i] & NTDB_OFF_MASK;
- if (entries[i] & (1ULL << NTDB_OFF_CHAIN_BIT)) {
- ecode = check_hash_chain(ntdb, off, i,
- used, num_used, &num_found,
- check, data);
- } else {
- ecode = check_entry(ntdb, entries[i], i,
- used, num_used, &num_found,
- check, data);
- }
- if (ecode) {
- break;
- }
- }
- ntdb_access_release(ntdb, entries);
-
- if (ecode == NTDB_SUCCESS && num_found != num_used) {
- ecode = ntdb_logerr(ntdb, NTDB_ERR_CORRUPT, NTDB_LOG_ERROR,
- "ntdb_check: Not all entries are in hash");
- }
- return ecode;
-}
-
-static enum NTDB_ERROR check_free(struct ntdb_context *ntdb,
- ntdb_off_t off,
- const struct ntdb_free_record *frec,
- ntdb_off_t prev, unsigned int ftable,
- unsigned int bucket)
-{
- enum NTDB_ERROR ecode;
-
- if (frec_magic(frec) != NTDB_FREE_MAGIC) {
- return ntdb_logerr(ntdb, NTDB_ERR_CORRUPT, NTDB_LOG_ERROR,
- "ntdb_check: offset %llu bad magic 0x%llx",
- (long long)off,
- (long long)frec->magic_and_prev);
- }
- if (frec_ftable(frec) != ftable) {
- return ntdb_logerr(ntdb, NTDB_ERR_CORRUPT, NTDB_LOG_ERROR,
- "ntdb_check: offset %llu bad freetable %u",
- (long long)off, frec_ftable(frec));
-
- }
-
- ecode = ntdb_oob(ntdb, off,
- frec_len(frec) + sizeof(struct ntdb_used_record),
- false);
- if (ecode != NTDB_SUCCESS) {
- return ecode;
- }
- if (size_to_bucket(frec_len(frec)) != bucket) {
- return ntdb_logerr(ntdb, NTDB_ERR_CORRUPT, NTDB_LOG_ERROR,
- "ntdb_check: offset %llu in wrong bucket"
- " (%u vs %u)",
- (long long)off,
- bucket, size_to_bucket(frec_len(frec)));
- }
- if (prev && prev != frec_prev(frec)) {
- return ntdb_logerr(ntdb, NTDB_ERR_CORRUPT, NTDB_LOG_ERROR,
- "ntdb_check: offset %llu bad prev"
- " (%llu vs %llu)",
- (long long)off,
- (long long)prev, (long long)frec_len(frec));
- }
- return NTDB_SUCCESS;
-}
-
-static enum NTDB_ERROR check_free_table(struct ntdb_context *ntdb,
- ntdb_off_t ftable_off,
- unsigned ftable_num,
- ntdb_off_t fr[],
- size_t num_free,
- size_t *num_found)
-{
- struct ntdb_freetable ft;
- ntdb_off_t h;
- unsigned int i;
- enum NTDB_ERROR ecode;
-
- ecode = ntdb_read_convert(ntdb, ftable_off, &ft, sizeof(ft));
- if (ecode != NTDB_SUCCESS) {
- return ecode;
- }
-
- if (rec_magic(&ft.hdr) != NTDB_FTABLE_MAGIC
- || rec_key_length(&ft.hdr) != 0
- || rec_data_length(&ft.hdr) != sizeof(ft) - sizeof(ft.hdr)) {
- return ntdb_logerr(ntdb, NTDB_ERR_CORRUPT, NTDB_LOG_ERROR,
- "ntdb_check: Invalid header on free table");
- }
-
- for (i = 0; i < NTDB_FREE_BUCKETS; i++) {
- ntdb_off_t off, prev = 0, *p, first = 0;
- struct ntdb_free_record f;
-
- h = bucket_off(ftable_off, i);
- for (off = ntdb_read_off(ntdb, h); off; off = f.next) {
- if (NTDB_OFF_IS_ERR(off)) {
- return NTDB_OFF_TO_ERR(off);
- }
- if (!first) {
- off &= NTDB_OFF_MASK;
- first = off;
- }
- ecode = ntdb_read_convert(ntdb, off, &f, sizeof(f));
- if (ecode != NTDB_SUCCESS) {
- return ecode;
- }
- ecode = check_free(ntdb, off, &f, prev, ftable_num, i);
- if (ecode != NTDB_SUCCESS) {
- return ecode;
- }
-
- /* FIXME: Check hash bits */
- p = asearch(&off, fr, num_free, off_cmp, NULL);
- if (!p) {
- return ntdb_logerr(ntdb, NTDB_ERR_CORRUPT,
- NTDB_LOG_ERROR,
- "ntdb_check: Invalid offset"
- " %llu in free table",
- (long long)off);
- }
- /* Mark it invalid. */
- *p ^= 1;
- (*num_found)++;
- prev = off;
- }
-
- if (first) {
- /* Now we can check first back pointer. */
- ecode = ntdb_read_convert(ntdb, first, &f, sizeof(f));
- if (ecode != NTDB_SUCCESS) {
- return ecode;
- }
- ecode = check_free(ntdb, first, &f, prev, ftable_num, i);
- if (ecode != NTDB_SUCCESS) {
- return ecode;
- }
- }
- }
- return NTDB_SUCCESS;
-}
-
-/* Slow, but should be very rare. */
-ntdb_off_t dead_space(struct ntdb_context *ntdb, ntdb_off_t off)
-{
- size_t len;
- enum NTDB_ERROR ecode;
-
- for (len = 0; off + len < ntdb->file->map_size; len++) {
- char c;
- ecode = ntdb->io->tread(ntdb, off, &c, 1);
- if (ecode != NTDB_SUCCESS) {
- return NTDB_ERR_TO_OFF(ecode);
- }
- if (c != 0 && c != 0x43)
- break;
- }
- return len;
-}
-
-static enum NTDB_ERROR check_linear(struct ntdb_context *ntdb,
- ntdb_off_t **used, size_t *num_used,
- ntdb_off_t **fr, size_t *num_free,
- uint64_t features, ntdb_off_t recovery)
-{
- ntdb_off_t off;
- ntdb_len_t len;
- enum NTDB_ERROR ecode;
- bool found_recovery = false;
-
- for (off = sizeof(struct ntdb_header);
- off < ntdb->file->map_size;
- off += len) {
- union {
- struct ntdb_used_record u;
- struct ntdb_free_record f;
- struct ntdb_recovery_record r;
- } rec;
- /* r is larger: only get that if we need to. */
- ecode = ntdb_read_convert(ntdb, off, &rec, sizeof(rec.f));
- if (ecode != NTDB_SUCCESS) {
- return ecode;
- }
-
- /* If we crash after ftruncate, we can get zeroes or fill. */
- if (rec.r.magic == NTDB_RECOVERY_INVALID_MAGIC
- || rec.r.magic == 0x4343434343434343ULL) {
- ecode = ntdb_read_convert(ntdb, off, &rec, sizeof(rec.r));
- if (ecode != NTDB_SUCCESS) {
- return ecode;
- }
- if (recovery == off) {
- found_recovery = true;
- len = sizeof(rec.r) + rec.r.max_len;
- } else {
- len = dead_space(ntdb, off);
- if (NTDB_OFF_IS_ERR(len)) {
- return NTDB_OFF_TO_ERR(len);
- }
- if (len < sizeof(rec.r)) {
- return ntdb_logerr(ntdb, NTDB_ERR_CORRUPT,
- NTDB_LOG_ERROR,
- "ntdb_check: invalid"
- " dead space at %zu",
- (size_t)off);
- }
-
- ntdb_logerr(ntdb, NTDB_SUCCESS, NTDB_LOG_WARNING,
- "Dead space at %zu-%zu (of %zu)",
- (size_t)off, (size_t)(off + len),
- (size_t)ntdb->file->map_size);
- }
- } else if (rec.r.magic == NTDB_RECOVERY_MAGIC) {
- ecode = ntdb_read_convert(ntdb, off, &rec, sizeof(rec.r));
- if (ecode != NTDB_SUCCESS) {
- return ecode;
- }
- if (recovery != off) {
- return ntdb_logerr(ntdb, NTDB_ERR_CORRUPT,
- NTDB_LOG_ERROR,
- "ntdb_check: unexpected"
- " recovery record at offset"
- " %zu",
- (size_t)off);
- }
- if (rec.r.len > rec.r.max_len) {
- return ntdb_logerr(ntdb, NTDB_ERR_CORRUPT,
- NTDB_LOG_ERROR,
- "ntdb_check: invalid recovery"
- " length %zu",
- (size_t)rec.r.len);
- }
- if (rec.r.eof > ntdb->file->map_size) {
- return ntdb_logerr(ntdb, NTDB_ERR_CORRUPT,
- NTDB_LOG_ERROR,
- "ntdb_check: invalid old EOF"
- " %zu", (size_t)rec.r.eof);
- }
- found_recovery = true;
- len = sizeof(rec.r) + rec.r.max_len;
- } else if (frec_magic(&rec.f) == NTDB_FREE_MAGIC) {
- len = sizeof(rec.u) + frec_len(&rec.f);
- if (off + len > ntdb->file->map_size) {
- return ntdb_logerr(ntdb, NTDB_ERR_CORRUPT,
- NTDB_LOG_ERROR,
- "ntdb_check: free overlength"
- " %llu at offset %llu",
- (long long)len,
- (long long)off);
- }
- /* This record should be in free lists. */
- if (frec_ftable(&rec.f) != NTDB_FTABLE_NONE
- && !append(ntdb, fr, num_free, off)) {
- return ntdb_logerr(ntdb, NTDB_ERR_OOM,
- NTDB_LOG_ERROR,
- "ntdb_check: tracking %zu'th"
- " free record.", *num_free);
- }
- } else if (rec_magic(&rec.u) == NTDB_USED_MAGIC
- || rec_magic(&rec.u) == NTDB_CHAIN_MAGIC
- || rec_magic(&rec.u) == NTDB_HTABLE_MAGIC
- || rec_magic(&rec.u) == NTDB_FTABLE_MAGIC
- || rec_magic(&rec.u) == NTDB_CAP_MAGIC) {
- uint64_t klen, dlen, extra;
-
- /* This record is used! */
- if (!append(ntdb, used, num_used, off)) {
- return ntdb_logerr(ntdb, NTDB_ERR_OOM,
- NTDB_LOG_ERROR,
- "ntdb_check: tracking %zu'th"
- " used record.", *num_used);
- }
-
- klen = rec_key_length(&rec.u);
- dlen = rec_data_length(&rec.u);
- extra = rec_extra_padding(&rec.u);
-
- len = sizeof(rec.u) + klen + dlen + extra;
- if (off + len > ntdb->file->map_size) {
- return ntdb_logerr(ntdb, NTDB_ERR_CORRUPT,
- NTDB_LOG_ERROR,
- "ntdb_check: used overlength"
- " %llu at offset %llu",
- (long long)len,
- (long long)off);
- }
-
- if (len < sizeof(rec.f)) {
- return ntdb_logerr(ntdb, NTDB_ERR_CORRUPT,
- NTDB_LOG_ERROR,
- "ntdb_check: too short record"
- " %llu at %llu",
- (long long)len,
- (long long)off);
- }
-
- /* Check that records have correct 0 at end (but may
- * not in future). */
- if (extra && !features
- && rec_magic(&rec.u) != NTDB_CAP_MAGIC) {
- const char *p;
- char c;
- p = ntdb_access_read(ntdb, off + sizeof(rec.u)
- + klen + dlen, 1, false);
- if (NTDB_PTR_IS_ERR(p))
- return NTDB_PTR_ERR(p);
- c = *p;
- ntdb_access_release(ntdb, p);
-
- if (c != '\0') {
- return ntdb_logerr(ntdb, NTDB_ERR_CORRUPT,
- NTDB_LOG_ERROR,
- "ntdb_check:"
- " non-zero extra"
- " at %llu",
- (long long)off);
- }
- }
- } else {
- return ntdb_logerr(ntdb, NTDB_ERR_CORRUPT,
- NTDB_LOG_ERROR,
- "ntdb_check: Bad magic 0x%llx"
- " at offset %zu",
- (long long)rec_magic(&rec.u),
- (size_t)off);
- }
- }
-
- /* We must have found recovery area if there was one. */
- if (recovery != 0 && !found_recovery) {
- return ntdb_logerr(ntdb, NTDB_ERR_CORRUPT, NTDB_LOG_ERROR,
- "ntdb_check: expected a recovery area at %zu",
- (size_t)recovery);
- }
-
- return NTDB_SUCCESS;
-}
-
-_PUBLIC_ enum NTDB_ERROR ntdb_check_(struct ntdb_context *ntdb,
- enum NTDB_ERROR (*check)(NTDB_DATA, NTDB_DATA, void *),
- void *data)
-{
- ntdb_off_t *fr = NULL, *used = NULL;
- ntdb_off_t ft = 0, recovery = 0;
- size_t num_free = 0, num_used = 0, num_found = 0, num_ftables = 0,
- num_capabilities = 0;
- uint64_t features = 0;
- enum NTDB_ERROR ecode;
-
- if (ntdb->flags & NTDB_CANT_CHECK) {
- return ntdb_logerr(ntdb, NTDB_SUCCESS, NTDB_LOG_WARNING,
- "ntdb_check: database has unknown capability,"
- " cannot check.");
- }
-
- ecode = ntdb_allrecord_lock(ntdb, F_RDLCK, NTDB_LOCK_WAIT, false);
- if (ecode != NTDB_SUCCESS) {
- return ecode;
- }
-
- ecode = ntdb_lock_expand(ntdb, F_RDLCK);
- if (ecode != NTDB_SUCCESS) {
- ntdb_allrecord_unlock(ntdb, F_RDLCK);
- return ecode;
- }
-
- ecode = check_header(ntdb, &recovery, &features, &num_capabilities);
- if (ecode != NTDB_SUCCESS)
- goto out;
-
- /* First we do a linear scan, checking all records. */
- ecode = check_linear(ntdb, &used, &num_used, &fr, &num_free, features,
- recovery);
- if (ecode != NTDB_SUCCESS)
- goto out;
-
- for (ft = first_ftable(ntdb); ft; ft = next_ftable(ntdb, ft)) {
- if (NTDB_OFF_IS_ERR(ft)) {
- ecode = NTDB_OFF_TO_ERR(ft);
- goto out;
- }
- ecode = check_free_table(ntdb, ft, num_ftables, fr, num_free,
- &num_found);
- if (ecode != NTDB_SUCCESS)
- goto out;
- num_ftables++;
- }
-
- /* FIXME: Check key uniqueness? */
- ecode = check_hash(ntdb, used, num_used, num_ftables + num_capabilities,
- check, data);
- if (ecode != NTDB_SUCCESS)
- goto out;
-
- if (num_found != num_free) {
- ecode = ntdb_logerr(ntdb, NTDB_ERR_CORRUPT, NTDB_LOG_ERROR,
- "ntdb_check: Not all entries are in"
- " free table");
- }
-
-out:
- ntdb_allrecord_unlock(ntdb, F_RDLCK);
- ntdb_unlock_expand(ntdb, F_RDLCK);
- ntdb->free_fn(fr, ntdb->alloc_data);
- ntdb->free_fn(used, ntdb->alloc_data);
- return ecode;
-}
projects / ccan / blobdiff