NULL) == 0) {
return rec_ptr;
}
+ /* detect tight infinite loop */
+ if (rec_ptr == r->next) {
+ tdb->ecode = TDB_ERR_CORRUPT;
+ TDB_LOG((tdb, TDB_DEBUG_FATAL, "tdb_find: loop detected.\n"));
+ return 0;
+ }
rec_ptr = r->next;
}
- return TDB_ERRCODE(TDB_ERR_NOEXIST, 0);
+ tdb->ecode = TDB_ERR_NOEXIST;
+ return 0;
}
/* As tdb_find, but if you succeed, keep the lock */
* then the TDB_DATA will have zero length but
* a non-zero pointer
*/
-TDB_DATA tdb_fetch(struct tdb_context *tdb, TDB_DATA key)
+static TDB_DATA _tdb_fetch(struct tdb_context *tdb, TDB_DATA key)
{
tdb_off_t rec_ptr;
struct list_struct rec;
/* find which hash bucket it is in */
hash = tdb->hash_fn(&key);
- if (!(rec_ptr = tdb_find_lock_hash(tdb,key,hash,F_RDLCK,&rec)))
+ if (!(rec_ptr = tdb_find_lock_hash(tdb,key,hash,F_RDLCK,&rec))) {
return tdb_null;
-
+ }
ret.dptr = tdb_alloc_read(tdb, rec_ptr + sizeof(rec) + rec.key_len,
rec.data_len);
ret.dsize = rec.data_len;
return ret;
}
+TDB_DATA tdb_fetch(struct tdb_context *tdb, TDB_DATA key)
+{
+ TDB_DATA ret = _tdb_fetch(tdb, key);
+
+ tdb_trace_1rec_retrec(tdb, "tdb_fetch", key, ret);
+ return ret;
+}
+
/*
* Find an entry in the database and hand the record's data to a parsing
* function. The parsing function is executed under the chain read lock, so it
hash = tdb->hash_fn(&key);
if (!(rec_ptr = tdb_find_lock_hash(tdb,key,hash,F_RDLCK,&rec))) {
- return TDB_ERRCODE(TDB_ERR_NOEXIST, 0);
+ tdb_trace_1rec_ret(tdb, "tdb_parse_record", key,
+ -TDB_ERR_NOEXIST);
+ tdb->ecode = TDB_ERR_NOEXIST;
+ return 0;
}
+ tdb_trace_1rec_ret(tdb, "tdb_parse_record", key, 0);
ret = tdb_parse_data(tdb, key, rec_ptr + sizeof(rec) + rec.key_len,
rec.data_len, parser, private_data);
int tdb_exists(struct tdb_context *tdb, TDB_DATA key)
{
uint32_t hash = tdb->hash_fn(&key);
- return tdb_exists_hash(tdb, key, hash);
+ int ret;
+
+ ret = tdb_exists_hash(tdb, key, hash);
+ tdb_trace_1rec_ret(tdb, "tdb_exists", key, ret);
+ return ret;
}
/* actually delete an entry in the database given the offset */
int tdb_delete(struct tdb_context *tdb, TDB_DATA key)
{
uint32_t hash = tdb->hash_fn(&key);
- return tdb_delete_hash(tdb, key, hash);
+ int ret;
+
+ ret = tdb_delete_hash(tdb, key, hash);
+ tdb_trace_1rec_ret(tdb, "tdb_delete", key, ret);
+ return ret;
}
/*
return 0;
}
-/* store an element in the database, replacing any existing element
- with the same key
-
- return 0 on success, -1 on failure
-*/
-int tdb_store(struct tdb_context *tdb, TDB_DATA key, TDB_DATA dbuf, int flag)
+static int _tdb_store(struct tdb_context *tdb, TDB_DATA key,
+ TDB_DATA dbuf, int flag, uint32_t hash)
{
struct list_struct rec;
- uint32_t hash;
tdb_off_t rec_ptr;
char *p = NULL;
int ret = -1;
- if (tdb->read_only || tdb->traverse_read) {
- tdb->ecode = TDB_ERR_RDONLY;
- return -1;
- }
-
- /* find which hash bucket it is in */
- hash = tdb->hash_fn(&key);
- if (tdb_lock(tdb, BUCKET(hash), F_WRLCK) == -1)
- return -1;
-
/* check for it existing, on insert. */
if (flag == TDB_INSERT) {
if (tdb_exists_hash(tdb, key, hash)) {
}
SAFE_FREE(p);
+ return ret;
+}
+
+/* store an element in the database, replacing any existing element
+ with the same key
+
+ return 0 on success, -1 on failure
+*/
+int tdb_store(struct tdb_context *tdb, TDB_DATA key, TDB_DATA dbuf, int flag)
+{
+ uint32_t hash;
+ int ret;
+
+ if (tdb->read_only || tdb->traverse_read) {
+ tdb->ecode = TDB_ERR_RDONLY;
+ tdb_trace_2rec_flag_ret(tdb, "tdb_store", key, dbuf, flag,
+ -TDB_ERR_RDONLY);
+ return -1;
+ }
+
+ /* find which hash bucket it is in */
+ hash = tdb->hash_fn(&key);
+ if (tdb_lock(tdb, BUCKET(hash), F_WRLCK) == -1)
+ return -1;
+
+ ret = _tdb_store(tdb, key, dbuf, flag, hash);
+ tdb_trace_2rec_flag_ret(tdb, "tdb_store", key, dbuf, flag, ret);
tdb_unlock(tdb, BUCKET(hash), F_WRLCK);
return ret;
}
if (tdb_lock(tdb, BUCKET(hash), F_WRLCK) == -1)
return -1;
- dbuf = tdb_fetch(tdb, key);
+ dbuf = _tdb_fetch(tdb, key);
if (dbuf.dptr == NULL) {
dbuf.dptr = (unsigned char *)malloc(new_dbuf.dsize);
} else {
- unsigned char *new_dptr = (unsigned char *)realloc(dbuf.dptr,
- dbuf.dsize + new_dbuf.dsize);
+ unsigned int new_len = dbuf.dsize + new_dbuf.dsize;
+ unsigned char *new_dptr;
+
+ /* realloc '0' is special: don't do that. */
+ if (new_len == 0)
+ new_len = 1;
+ new_dptr = (unsigned char *)realloc(dbuf.dptr, new_len);
if (new_dptr == NULL) {
free(dbuf.dptr);
}
memcpy(dbuf.dptr + dbuf.dsize, new_dbuf.dptr, new_dbuf.dsize);
dbuf.dsize += new_dbuf.dsize;
- ret = tdb_store(tdb, key, dbuf, 0);
+ ret = _tdb_store(tdb, key, dbuf, 0, hash);
+ tdb_trace_2rec_retrec(tdb, "tdb_append", key, new_dbuf, dbuf);
failed:
tdb_unlock(tdb, BUCKET(hash), F_WRLCK);
tdb_off_t seqnum=0;
tdb_ofs_read(tdb, TDB_SEQNUM_OFS, &seqnum);
+ tdb_trace_ret(tdb, "tdb_get_seqnum", seqnum);
return seqnum;
}
return -1;
}
+ tdb_trace(tdb, "tdb_wipe_all");
+
/* see if the tdb has a recovery area, and remember its size
if so. We don't want to lose this as otherwise each
tdb_wipe_all() in a transaction will increase the size of
tdb_unlockall(tdb);
return -1;
}
+
+
+struct traverse_state {
+ bool error;
+ struct tdb_context *dest_db;
+};
+
+/*
+ traverse function for repacking
+ */
+static int repack_traverse(struct tdb_context *tdb, TDB_DATA key, TDB_DATA data, void *private)
+{
+ struct traverse_state *state = (struct traverse_state *)private;
+ if (tdb_store(state->dest_db, key, data, TDB_INSERT) != 0) {
+ state->error = true;
+ return -1;
+ }
+ return 0;
+}
+
+/*
+ repack a tdb
+ */
+int tdb_repack(struct tdb_context *tdb)
+{
+ struct tdb_context *tmp_db;
+ struct traverse_state state;
+
+ tdb_trace(tdb, "tdb_repack");
+
+ if (tdb_transaction_start(tdb) != 0) {
+ TDB_LOG((tdb, TDB_DEBUG_FATAL, "tdb_repack: Failed to start transaction\n"));
+ return -1;
+ }
+
+ tmp_db = tdb_open("tmpdb", tdb_hash_size(tdb), TDB_INTERNAL, O_RDWR|O_CREAT, 0);
+ if (tmp_db == NULL) {
+ TDB_LOG((tdb, TDB_DEBUG_FATAL, "tdb_repack: Failed to create tmp_db\n"));
+ tdb_transaction_cancel(tdb);
+ return -1;
+ }
+
+ state.error = false;
+ state.dest_db = tmp_db;
+
+ if (tdb_traverse_read(tdb, repack_traverse, &state) == -1) {
+ TDB_LOG((tdb, TDB_DEBUG_FATAL, "tdb_repack: Failed to traverse copying out\n"));
+ tdb_transaction_cancel(tdb);
+ tdb_close(tmp_db);
+ return -1;
+ }
+
+ if (state.error) {
+ TDB_LOG((tdb, TDB_DEBUG_FATAL, "tdb_repack: Error during traversal\n"));
+ tdb_transaction_cancel(tdb);
+ tdb_close(tmp_db);
+ return -1;
+ }
+
+ if (tdb_wipe_all(tdb) != 0) {
+ TDB_LOG((tdb, TDB_DEBUG_FATAL, "tdb_repack: Failed to wipe database\n"));
+ tdb_transaction_cancel(tdb);
+ tdb_close(tmp_db);
+ return -1;
+ }
+
+ state.error = false;
+ state.dest_db = tdb;
+
+ if (tdb_traverse_read(tmp_db, repack_traverse, &state) == -1) {
+ TDB_LOG((tdb, TDB_DEBUG_FATAL, "tdb_repack: Failed to traverse copying back\n"));
+ tdb_transaction_cancel(tdb);
+ tdb_close(tmp_db);
+ return -1;
+ }
+
+ if (state.error) {
+ TDB_LOG((tdb, TDB_DEBUG_FATAL, "tdb_repack: Error during second traversal\n"));
+ tdb_transaction_cancel(tdb);
+ tdb_close(tmp_db);
+ return -1;
+ }
+
+ tdb_close(tmp_db);
+
+ if (tdb_transaction_commit(tdb) != 0) {
+ TDB_LOG((tdb, TDB_DEBUG_FATAL, "tdb_repack: Failed to commit\n"));
+ return -1;
+ }
+
+ return 0;
+}
+
+#ifdef TDB_TRACE
+static void tdb_trace_write(struct tdb_context *tdb, const char *str)
+{
+ if (write(tdb->tracefd, str, strlen(str)) != strlen(str)) {
+ close(tdb->tracefd);
+ tdb->tracefd = -1;
+ }
+}
+
+static void tdb_trace_start(struct tdb_context *tdb)
+{
+ tdb_off_t seqnum=0;
+ char msg[sizeof(tdb_off_t) * 4];
+
+ tdb_ofs_read(tdb, TDB_SEQNUM_OFS, &seqnum);
+ sprintf(msg, "%u ", seqnum);
+ tdb_trace_write(tdb, msg);
+}
+
+static void tdb_trace_end(struct tdb_context *tdb)
+{
+ tdb_trace_write(tdb, "\n");
+}
+
+static void tdb_trace_end_ret(struct tdb_context *tdb, int ret)
+{
+ char msg[sizeof(ret) * 4];
+ sprintf(msg, " = %i\n", ret);
+ tdb_trace_write(tdb, msg);
+}
+
+static void tdb_trace_record(struct tdb_context *tdb, TDB_DATA rec)
+{
+ char msg[20 + rec.dsize*2], *p;
+ unsigned int i;
+
+ /* We differentiate zero-length records from non-existent ones. */
+ if (rec.dptr == NULL) {
+ tdb_trace_write(tdb, " NULL");
+ return;
+ }
+
+ p = msg;
+ p += sprintf(p, " %zu:", rec.dsize);
+ for (i = 0; i < rec.dsize; i++)
+ p += sprintf(p, "%02x", rec.dptr[i]);
+
+ tdb_trace_write(tdb, msg);
+}
+
+void tdb_trace(struct tdb_context *tdb, const char *op)
+{
+ tdb_trace_start(tdb);
+ tdb_trace_write(tdb, op);
+ tdb_trace_end(tdb);
+}
+
+void tdb_trace_seqnum(struct tdb_context *tdb, uint32_t seqnum, const char *op)
+{
+ char msg[sizeof(tdb_off_t) * 4];
+
+ sprintf(msg, "%u ", seqnum);
+ tdb_trace_write(tdb, msg);
+ tdb_trace_write(tdb, op);
+ tdb_trace_end(tdb);
+}
+
+void tdb_trace_open(struct tdb_context *tdb, const char *op,
+ unsigned hash_size, unsigned tdb_flags, unsigned open_flags)
+{
+ char msg[128];
+
+ sprintf(msg, "%s %u %#x %#x", op, hash_size, tdb_flags, open_flags);
+ tdb_trace_start(tdb);
+ tdb_trace_write(tdb, msg);
+ tdb_trace_end(tdb);
+}
+
+void tdb_trace_ret(struct tdb_context *tdb, const char *op, int ret)
+{
+ tdb_trace_start(tdb);
+ tdb_trace_write(tdb, op);
+ tdb_trace_end_ret(tdb, ret);
+}
+
+void tdb_trace_retrec(struct tdb_context *tdb, const char *op, TDB_DATA ret)
+{
+ tdb_trace_start(tdb);
+ tdb_trace_write(tdb, op);
+ tdb_trace_write(tdb, " =");
+ tdb_trace_record(tdb, ret);
+ tdb_trace_end(tdb);
+}
+
+void tdb_trace_1rec(struct tdb_context *tdb, const char *op,
+ TDB_DATA rec)
+{
+ tdb_trace_start(tdb);
+ tdb_trace_write(tdb, op);
+ tdb_trace_record(tdb, rec);
+ tdb_trace_end(tdb);
+}
+
+void tdb_trace_1rec_ret(struct tdb_context *tdb, const char *op,
+ TDB_DATA rec, int ret)
+{
+ tdb_trace_start(tdb);
+ tdb_trace_write(tdb, op);
+ tdb_trace_record(tdb, rec);
+ tdb_trace_end_ret(tdb, ret);
+}
+
+void tdb_trace_1rec_retrec(struct tdb_context *tdb, const char *op,
+ TDB_DATA rec, TDB_DATA ret)
+{
+ tdb_trace_start(tdb);
+ tdb_trace_write(tdb, op);
+ tdb_trace_record(tdb, rec);
+ tdb_trace_write(tdb, " =");
+ tdb_trace_record(tdb, ret);
+ tdb_trace_end(tdb);
+}
+
+void tdb_trace_2rec_flag_ret(struct tdb_context *tdb, const char *op,
+ TDB_DATA rec1, TDB_DATA rec2, unsigned flag,
+ int ret)
+{
+ char msg[sizeof(ret) * 4];
+
+ sprintf(msg, " %#x", flag);
+ tdb_trace_start(tdb);
+ tdb_trace_write(tdb, op);
+ tdb_trace_record(tdb, rec1);
+ tdb_trace_record(tdb, rec2);
+ tdb_trace_write(tdb, msg);
+ tdb_trace_end_ret(tdb, ret);
+}
+
+void tdb_trace_2rec_retrec(struct tdb_context *tdb, const char *op,
+ TDB_DATA rec1, TDB_DATA rec2, TDB_DATA ret)
+{
+ tdb_trace_start(tdb);
+ tdb_trace_write(tdb, op);
+ tdb_trace_record(tdb, rec1);
+ tdb_trace_record(tdb, rec2);
+ tdb_trace_write(tdb, " =");
+ tdb_trace_record(tdb, ret);
+ tdb_trace_end(tdb);
+}
+#endif
projects / ccan / blobdiff