return true;
}
-static enum TDB_ERROR check_header(struct tdb_context *tdb, tdb_off_t *recovery)
+static enum TDB_ERROR check_header(struct tdb_context *tdb, tdb_off_t *recovery,
+ uint64_t *features)
{
uint64_t hash_test;
struct tdb_header hdr;
hdr.magic_food);
}
+ /* Features which are used must be a subset of features offered. */
+ if (hdr.features_used & ~hdr.features_offered) {
+ return tdb_logerr(tdb, TDB_ERR_CORRUPT, TDB_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 > tdb->map_size) {
static enum TDB_ERROR check_linear(struct tdb_context *tdb,
tdb_off_t **used, size_t *num_used,
tdb_off_t **fr, size_t *num_free,
- tdb_off_t recovery)
+ uint64_t features, tdb_off_t recovery)
{
tdb_off_t off;
tdb_len_t len;
(long long)len,
(long long)off);
}
+
+ /* Check that records have correct 0 at end (but may
+ * not in future). */
+ if (extra && !features) {
+ const char *p;
+ char c;
+ p = tdb_access_read(tdb, off + sizeof(rec.u)
+ + klen + dlen, 1, false);
+ if (TDB_PTR_IS_ERR(p))
+ return TDB_PTR_ERR(p);
+ c = *p;
+ tdb_access_release(tdb, p);
+
+ if (c != '\0') {
+ return tdb_logerr(tdb, TDB_ERR_CORRUPT,
+ TDB_LOG_ERROR,
+ "tdb_check:"
+ " non-zero extra"
+ " at %llu",
+ (long long)off);
+ }
+ }
} else {
return tdb_logerr(tdb, TDB_ERR_CORRUPT,
TDB_LOG_ERROR,
{
tdb_off_t *fr = NULL, *used = NULL, ft, recovery;
size_t num_free = 0, num_used = 0, num_found = 0, num_ftables = 0;
+ uint64_t features;
enum TDB_ERROR ecode;
ecode = tdb_allrecord_lock(tdb, F_RDLCK, TDB_LOCK_WAIT, false);
return ecode;
}
- ecode = check_header(tdb, &recovery);
+ ecode = check_header(tdb, &recovery, &features);
if (ecode != TDB_SUCCESS)
goto out;
/* First we do a linear scan, checking all records. */
- ecode = check_linear(tdb, &used, &num_used, &fr, &num_free, recovery);
+ ecode = check_linear(tdb, &used, &num_used, &fr, &num_free, features,
+ recovery);
if (ecode != TDB_SUCCESS)
goto out;