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zap.c (321527) zap.c (321547)
1/*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License (the "License").
6 * You may not use this file except in compliance with the License.
7 *
8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE

--- 1342 unchanged lines hidden (view full) ---

1351 if (err == 0) {
1352 zap_stats_ptrtbl(zap, db->db_data,
1353 1<<(bs-3), zs);
1354 dmu_buf_rele(db, FTAG);
1355 }
1356 }
1357 }
1358}
1/*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License (the "License").
6 * You may not use this file except in compliance with the License.
7 *
8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE

--- 1342 unchanged lines hidden (view full) ---

1351 if (err == 0) {
1352 zap_stats_ptrtbl(zap, db->db_data,
1353 1<<(bs-3), zs);
1354 dmu_buf_rele(db, FTAG);
1355 }
1356 }
1357 }
1358}
1359
1360int
1361fzap_count_write(zap_name_t *zn, int add, refcount_t *towrite,
1362 refcount_t *tooverwrite)
1363{
1364 zap_t *zap = zn->zn_zap;
1365 zap_leaf_t *l;
1366 int err;
1367
1368 /*
1369 * Account for the header block of the fatzap.
1370 */
1371 if (!add && dmu_buf_freeable(zap->zap_dbuf)) {
1372 (void) refcount_add_many(tooverwrite,
1373 zap->zap_dbuf->db_size, FTAG);
1374 } else {
1375 (void) refcount_add_many(towrite,
1376 zap->zap_dbuf->db_size, FTAG);
1377 }
1378
1379 /*
1380 * Account for the pointer table blocks.
1381 * If we are adding we need to account for the following cases :
1382 * - If the pointer table is embedded, this operation could force an
1383 * external pointer table.
1384 * - If this already has an external pointer table this operation
1385 * could extend the table.
1386 */
1387 if (add) {
1388 if (zap_f_phys(zap)->zap_ptrtbl.zt_blk == 0) {
1389 (void) refcount_add_many(towrite,
1390 zap->zap_dbuf->db_size, FTAG);
1391 } else {
1392 (void) refcount_add_many(towrite,
1393 zap->zap_dbuf->db_size * 3, FTAG);
1394 }
1395 }
1396
1397 /*
1398 * Now, check if the block containing leaf is freeable
1399 * and account accordingly.
1400 */
1401 err = zap_deref_leaf(zap, zn->zn_hash, NULL, RW_READER, &l);
1402 if (err != 0) {
1403 return (err);
1404 }
1405
1406 if (!add && dmu_buf_freeable(l->l_dbuf)) {
1407 (void) refcount_add_many(tooverwrite, l->l_dbuf->db_size, FTAG);
1408 } else {
1409 /*
1410 * If this an add operation, the leaf block could split.
1411 * Hence, we need to account for an additional leaf block.
1412 */
1413 (void) refcount_add_many(towrite,
1414 (add ? 2 : 1) * l->l_dbuf->db_size, FTAG);
1415 }
1416
1417 zap_put_leaf(l);
1418 return (0);
1419}