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-rw-r--r--lib/tdb2/test/run-04-basichash.c267
1 files changed, 267 insertions, 0 deletions
diff --git a/lib/tdb2/test/run-04-basichash.c b/lib/tdb2/test/run-04-basichash.c
new file mode 100644
index 0000000000..62031bdb40
--- /dev/null
+++ b/lib/tdb2/test/run-04-basichash.c
@@ -0,0 +1,267 @@
+#include <ccan/tdb2/tdb.c>
+#include <ccan/tdb2/open.c>
+#include <ccan/tdb2/free.c>
+#include <ccan/tdb2/lock.c>
+#include <ccan/tdb2/io.c>
+#include <ccan/tdb2/hash.c>
+#include <ccan/tdb2/transaction.c>
+#include <ccan/tdb2/check.c>
+#include <ccan/tap/tap.h>
+#include "logging.h"
+
+/* We rig the hash so adjacent-numbered records always clash. */
+static uint64_t clash(const void *key, size_t len, uint64_t seed, void *priv)
+{
+ return ((uint64_t)*(const unsigned int *)key)
+ << (64 - TDB_TOPLEVEL_HASH_BITS - 1);
+}
+
+int main(int argc, char *argv[])
+{
+ unsigned int i, j;
+ struct tdb_context *tdb;
+ unsigned int v;
+ struct tdb_used_record rec;
+ struct tdb_data key = { (unsigned char *)&v, sizeof(v) };
+ struct tdb_data dbuf = { (unsigned char *)&v, sizeof(v) };
+ union tdb_attribute hattr = { .hash = { .base = { TDB_ATTRIBUTE_HASH },
+ .fn = clash } };
+ int flags[] = { TDB_INTERNAL, TDB_DEFAULT, TDB_NOMMAP,
+ TDB_INTERNAL|TDB_CONVERT, TDB_CONVERT,
+ TDB_NOMMAP|TDB_CONVERT,
+ };
+
+ hattr.base.next = &tap_log_attr;
+
+ plan_tests(sizeof(flags) / sizeof(flags[0])
+ * (91 + (2 * ((1 << TDB_HASH_GROUP_BITS) - 1))) + 1);
+ for (i = 0; i < sizeof(flags) / sizeof(flags[0]); i++) {
+ struct hash_info h;
+ tdb_off_t new_off, off, subhash;
+
+ tdb = tdb_open("run-04-basichash.tdb", flags[i],
+ O_RDWR|O_CREAT|O_TRUNC, 0600, &hattr);
+ ok1(tdb);
+ if (!tdb)
+ continue;
+
+ v = 0;
+ /* Should not find it. */
+ ok1(find_and_lock(tdb, key, F_WRLCK, &h, &rec, NULL) == 0);
+ /* Should have created correct hash. */
+ ok1(h.h == tdb_hash(tdb, key.dptr, key.dsize));
+ /* Should have located space in group 0, bucket 0. */
+ ok1(h.group_start == offsetof(struct tdb_header, hashtable));
+ ok1(h.home_bucket == 0);
+ ok1(h.found_bucket == 0);
+ ok1(h.hash_used == TDB_TOPLEVEL_HASH_BITS);
+
+ /* Should have lock on bucket 0 */
+ ok1(h.hlock_start == 0);
+ ok1(h.hlock_range ==
+ 1ULL << (64-(TDB_TOPLEVEL_HASH_BITS-TDB_HASH_GROUP_BITS)));
+ ok1((tdb->flags & TDB_NOLOCK) || tdb->file->num_lockrecs == 1);
+ ok1((tdb->flags & TDB_NOLOCK)
+ || tdb->file->lockrecs[0].off == TDB_HASH_LOCK_START);
+ /* FIXME: Check lock length */
+
+ /* Allocate a new record. */
+ new_off = alloc(tdb, key.dsize, dbuf.dsize, h.h,
+ TDB_USED_MAGIC, false);
+ ok1(!TDB_OFF_IS_ERR(new_off));
+
+ /* We should be able to add it now. */
+ ok1(add_to_hash(tdb, &h, new_off) == 0);
+
+ /* Make sure we fill it in for later finding. */
+ off = new_off + sizeof(struct tdb_used_record);
+ ok1(!tdb->methods->twrite(tdb, off, key.dptr, key.dsize));
+ off += key.dsize;
+ ok1(!tdb->methods->twrite(tdb, off, dbuf.dptr, dbuf.dsize));
+
+ /* We should be able to unlock that OK. */
+ ok1(tdb_unlock_hashes(tdb, h.hlock_start, h.hlock_range,
+ F_WRLCK) == 0);
+
+ /* Database should be consistent. */
+ ok1(tdb_check(tdb, NULL, NULL) == 0);
+
+ /* Now, this should give a successful lookup. */
+ ok1(find_and_lock(tdb, key, F_WRLCK, &h, &rec, NULL)
+ == new_off);
+ /* Should have created correct hash. */
+ ok1(h.h == tdb_hash(tdb, key.dptr, key.dsize));
+ /* Should have located space in group 0, bucket 0. */
+ ok1(h.group_start == offsetof(struct tdb_header, hashtable));
+ ok1(h.home_bucket == 0);
+ ok1(h.found_bucket == 0);
+ ok1(h.hash_used == TDB_TOPLEVEL_HASH_BITS);
+
+ /* Should have lock on bucket 0 */
+ ok1(h.hlock_start == 0);
+ ok1(h.hlock_range ==
+ 1ULL << (64-(TDB_TOPLEVEL_HASH_BITS-TDB_HASH_GROUP_BITS)));
+ ok1((tdb->flags & TDB_NOLOCK) || tdb->file->num_lockrecs == 1);
+ ok1((tdb->flags & TDB_NOLOCK)
+ || tdb->file->lockrecs[0].off == TDB_HASH_LOCK_START);
+ /* FIXME: Check lock length */
+
+ ok1(tdb_unlock_hashes(tdb, h.hlock_start, h.hlock_range,
+ F_WRLCK) == 0);
+
+ /* Database should be consistent. */
+ ok1(tdb_check(tdb, NULL, NULL) == 0);
+
+ /* Test expansion. */
+ v = 1;
+ ok1(find_and_lock(tdb, key, F_WRLCK, &h, &rec, NULL) == 0);
+ /* Should have created correct hash. */
+ ok1(h.h == tdb_hash(tdb, key.dptr, key.dsize));
+ /* Should have located space in group 0, bucket 1. */
+ ok1(h.group_start == offsetof(struct tdb_header, hashtable));
+ ok1(h.home_bucket == 0);
+ ok1(h.found_bucket == 1);
+ ok1(h.hash_used == TDB_TOPLEVEL_HASH_BITS);
+
+ /* Should have lock on bucket 0 */
+ ok1(h.hlock_start == 0);
+ ok1(h.hlock_range ==
+ 1ULL << (64-(TDB_TOPLEVEL_HASH_BITS-TDB_HASH_GROUP_BITS)));
+ ok1((tdb->flags & TDB_NOLOCK) || tdb->file->num_lockrecs == 1);
+ ok1((tdb->flags & TDB_NOLOCK)
+ || tdb->file->lockrecs[0].off == TDB_HASH_LOCK_START);
+ /* FIXME: Check lock length */
+
+ /* Make it expand 0'th bucket. */
+ ok1(expand_group(tdb, &h) == 0);
+ /* First one should be subhash, next should be empty. */
+ ok1(is_subhash(h.group[0]));
+ subhash = (h.group[0] & TDB_OFF_MASK);
+ for (j = 1; j < (1 << TDB_HASH_GROUP_BITS); j++)
+ ok1(h.group[j] == 0);
+
+ ok1(tdb_write_convert(tdb, h.group_start,
+ h.group, sizeof(h.group)) == 0);
+ ok1(tdb_unlock_hashes(tdb, h.hlock_start, h.hlock_range,
+ F_WRLCK) == 0);
+
+ /* Should be happy with expansion. */
+ ok1(tdb_check(tdb, NULL, NULL) == 0);
+
+ /* Should be able to find it. */
+ v = 0;
+ ok1(find_and_lock(tdb, key, F_WRLCK, &h, &rec, NULL)
+ == new_off);
+ /* Should have created correct hash. */
+ ok1(h.h == tdb_hash(tdb, key.dptr, key.dsize));
+ /* Should have located space in expanded group 0, bucket 0. */
+ ok1(h.group_start == subhash + sizeof(struct tdb_used_record));
+ ok1(h.home_bucket == 0);
+ ok1(h.found_bucket == 0);
+ ok1(h.hash_used == TDB_TOPLEVEL_HASH_BITS
+ + TDB_SUBLEVEL_HASH_BITS);
+
+ /* Should have lock on bucket 0 */
+ ok1(h.hlock_start == 0);
+ ok1(h.hlock_range ==
+ 1ULL << (64-(TDB_TOPLEVEL_HASH_BITS-TDB_HASH_GROUP_BITS)));
+ ok1((tdb->flags & TDB_NOLOCK) || tdb->file->num_lockrecs == 1);
+ ok1((tdb->flags & TDB_NOLOCK)
+ || tdb->file->lockrecs[0].off == TDB_HASH_LOCK_START);
+ /* FIXME: Check lock length */
+
+ /* Simple delete should work. */
+ ok1(delete_from_hash(tdb, &h) == 0);
+ ok1(add_free_record(tdb, new_off,
+ sizeof(struct tdb_used_record)
+ + rec_key_length(&rec)
+ + rec_data_length(&rec)
+ + rec_extra_padding(&rec),
+ TDB_LOCK_NOWAIT, false) == 0);
+ ok1(tdb_unlock_hashes(tdb, h.hlock_start, h.hlock_range,
+ F_WRLCK) == 0);
+ ok1(tdb_check(tdb, NULL, NULL) == 0);
+
+ /* Test second-level expansion: should expand 0th bucket. */
+ v = 0;
+ ok1(find_and_lock(tdb, key, F_WRLCK, &h, &rec, NULL) == 0);
+ /* Should have created correct hash. */
+ ok1(h.h == tdb_hash(tdb, key.dptr, key.dsize));
+ /* Should have located space in group 0, bucket 0. */
+ ok1(h.group_start == subhash + sizeof(struct tdb_used_record));
+ ok1(h.home_bucket == 0);
+ ok1(h.found_bucket == 0);
+ ok1(h.hash_used == TDB_TOPLEVEL_HASH_BITS+TDB_SUBLEVEL_HASH_BITS);
+
+ /* Should have lock on bucket 0 */
+ ok1(h.hlock_start == 0);
+ ok1(h.hlock_range ==
+ 1ULL << (64-(TDB_TOPLEVEL_HASH_BITS-TDB_HASH_GROUP_BITS)));
+ ok1((tdb->flags & TDB_NOLOCK) || tdb->file->num_lockrecs == 1);
+ ok1((tdb->flags & TDB_NOLOCK)
+ || tdb->file->lockrecs[0].off == TDB_HASH_LOCK_START);
+ /* FIXME: Check lock length */
+
+ ok1(expand_group(tdb, &h) == 0);
+ /* First one should be subhash, next should be empty. */
+ ok1(is_subhash(h.group[0]));
+ subhash = (h.group[0] & TDB_OFF_MASK);
+ for (j = 1; j < (1 << TDB_HASH_GROUP_BITS); j++)
+ ok1(h.group[j] == 0);
+ ok1(tdb_write_convert(tdb, h.group_start,
+ h.group, sizeof(h.group)) == 0);
+ ok1(tdb_unlock_hashes(tdb, h.hlock_start, h.hlock_range,
+ F_WRLCK) == 0);
+
+ /* Should be happy with expansion. */
+ ok1(tdb_check(tdb, NULL, NULL) == 0);
+
+ ok1(find_and_lock(tdb, key, F_WRLCK, &h, &rec, NULL) == 0);
+ /* Should have created correct hash. */
+ ok1(h.h == tdb_hash(tdb, key.dptr, key.dsize));
+ /* Should have located space in group 0, bucket 0. */
+ ok1(h.group_start == subhash + sizeof(struct tdb_used_record));
+ ok1(h.home_bucket == 0);
+ ok1(h.found_bucket == 0);
+ ok1(h.hash_used == TDB_TOPLEVEL_HASH_BITS
+ + TDB_SUBLEVEL_HASH_BITS * 2);
+
+ /* We should be able to add it now. */
+ /* Allocate a new record. */
+ new_off = alloc(tdb, key.dsize, dbuf.dsize, h.h,
+ TDB_USED_MAGIC, false);
+ ok1(!TDB_OFF_IS_ERR(new_off));
+ ok1(add_to_hash(tdb, &h, new_off) == 0);
+
+ /* Make sure we fill it in for later finding. */
+ off = new_off + sizeof(struct tdb_used_record);
+ ok1(!tdb->methods->twrite(tdb, off, key.dptr, key.dsize));
+ off += key.dsize;
+ ok1(!tdb->methods->twrite(tdb, off, dbuf.dptr, dbuf.dsize));
+
+ /* We should be able to unlock that OK. */
+ ok1(tdb_unlock_hashes(tdb, h.hlock_start, h.hlock_range,
+ F_WRLCK) == 0);
+
+ /* Database should be consistent. */
+ ok1(tdb_check(tdb, NULL, NULL) == 0);
+
+ /* Should be able to find it. */
+ v = 0;
+ ok1(find_and_lock(tdb, key, F_WRLCK, &h, &rec, NULL)
+ == new_off);
+ /* Should have created correct hash. */
+ ok1(h.h == tdb_hash(tdb, key.dptr, key.dsize));
+ /* Should have located space in expanded group 0, bucket 0. */
+ ok1(h.group_start == subhash + sizeof(struct tdb_used_record));
+ ok1(h.home_bucket == 0);
+ ok1(h.found_bucket == 0);
+ ok1(h.hash_used == TDB_TOPLEVEL_HASH_BITS
+ + TDB_SUBLEVEL_HASH_BITS * 2);
+
+ tdb_close(tdb);
+ }
+
+ ok1(tap_log_messages == 0);
+ return exit_status();
+}
generated by cgit (git 2.34.1) at 2024-07-03 00:59:27 +0000