166325755SMatthew Dillon /* 266325755SMatthew Dillon * Copyright (c) 2007 The DragonFly Project. All rights reserved. 366325755SMatthew Dillon * 466325755SMatthew Dillon * This code is derived from software contributed to The DragonFly Project 566325755SMatthew Dillon * by Matthew Dillon <dillon@backplane.com> 666325755SMatthew Dillon * 766325755SMatthew Dillon * Redistribution and use in source and binary forms, with or without 866325755SMatthew Dillon * modification, are permitted provided that the following conditions 966325755SMatthew Dillon * are met: 1066325755SMatthew Dillon * 1166325755SMatthew Dillon * 1. Redistributions of source code must retain the above copyright 1266325755SMatthew Dillon * notice, this list of conditions and the following disclaimer. 1366325755SMatthew Dillon * 2. Redistributions in binary form must reproduce the above copyright 1466325755SMatthew Dillon * notice, this list of conditions and the following disclaimer in 1566325755SMatthew Dillon * the documentation and/or other materials provided with the 1666325755SMatthew Dillon * distribution. 1766325755SMatthew Dillon * 3. Neither the name of The DragonFly Project nor the names of its 1866325755SMatthew Dillon * contributors may be used to endorse or promote products derived 1966325755SMatthew Dillon * from this software without specific, prior written permission. 2066325755SMatthew Dillon * 2166325755SMatthew Dillon * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 2266325755SMatthew Dillon * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 2366325755SMatthew Dillon * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 2466325755SMatthew Dillon * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE 2566325755SMatthew Dillon * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 2666325755SMatthew Dillon * INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING, 2766325755SMatthew Dillon * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 2866325755SMatthew Dillon * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 2966325755SMatthew Dillon * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 3066325755SMatthew Dillon * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT 3166325755SMatthew Dillon * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 3266325755SMatthew Dillon * SUCH DAMAGE. 3366325755SMatthew Dillon * 34*a89aec1bSMatthew Dillon * $DragonFly: src/sys/vfs/hammer/hammer_transaction.c,v 1.3 2007/11/20 07:16:28 dillon Exp $ 3566325755SMatthew Dillon */ 3666325755SMatthew Dillon 3766325755SMatthew Dillon #include "hammer.h" 3866325755SMatthew Dillon 3966325755SMatthew Dillon void 408cd0a023SMatthew Dillon hammer_start_transaction(struct hammer_transaction *trans, 418cd0a023SMatthew Dillon struct hammer_mount *hmp) 4266325755SMatthew Dillon { 43*a89aec1bSMatthew Dillon int error; 4466325755SMatthew Dillon 4566325755SMatthew Dillon trans->hmp = hmp; 46*a89aec1bSMatthew Dillon trans->rootvol = hammer_get_root_volume(hmp, &error); 47*a89aec1bSMatthew Dillon KKASSERT(error == 0); 48*a89aec1bSMatthew Dillon trans->tid = hammer_alloc_tid(trans); 4966325755SMatthew Dillon } 5066325755SMatthew Dillon 5166325755SMatthew Dillon void 5266325755SMatthew Dillon hammer_abort_transaction(struct hammer_transaction *trans) 5366325755SMatthew Dillon { 54*a89aec1bSMatthew Dillon hammer_rel_volume(trans->rootvol, 0); 5566325755SMatthew Dillon KKASSERT(0); 5666325755SMatthew Dillon } 5766325755SMatthew Dillon 5866325755SMatthew Dillon void 5966325755SMatthew Dillon hammer_commit_transaction(struct hammer_transaction *trans) 6066325755SMatthew Dillon { 61*a89aec1bSMatthew Dillon hammer_rel_volume(trans->rootvol, 0); 6266325755SMatthew Dillon } 6366325755SMatthew Dillon 64*a89aec1bSMatthew Dillon hammer_tid_t 65*a89aec1bSMatthew Dillon hammer_alloc_tid(hammer_transaction_t trans) 66*a89aec1bSMatthew Dillon { 67*a89aec1bSMatthew Dillon hammer_volume_ondisk_t ondisk; 68*a89aec1bSMatthew Dillon struct timespec ts; 69*a89aec1bSMatthew Dillon hammer_tid_t tid; 70*a89aec1bSMatthew Dillon 71*a89aec1bSMatthew Dillon getnanotime(&ts); 72*a89aec1bSMatthew Dillon tid = ts.tv_sec * 1000000000LL + ts.tv_nsec; 73*a89aec1bSMatthew Dillon ondisk = trans->rootvol->ondisk; 74*a89aec1bSMatthew Dillon if (tid < ondisk->vol0_nexttid) 75*a89aec1bSMatthew Dillon tid = ondisk->vol0_nexttid; 76*a89aec1bSMatthew Dillon if (tid == 0xFFFFFFFFFFFFFFFFULL) 77*a89aec1bSMatthew Dillon panic("hammer_start_transaction: Ran out of TIDs!"); 78*a89aec1bSMatthew Dillon ondisk->vol0_nexttid = tid + 1; 79*a89aec1bSMatthew Dillon hammer_modify_volume(trans->rootvol); 80*a89aec1bSMatthew Dillon 81*a89aec1bSMatthew Dillon return(tid); 82*a89aec1bSMatthew Dillon } 83*a89aec1bSMatthew Dillon 84*a89aec1bSMatthew Dillon hammer_tid_t 85*a89aec1bSMatthew Dillon hammer_alloc_recid(hammer_transaction_t trans) 86*a89aec1bSMatthew Dillon { 87*a89aec1bSMatthew Dillon hammer_volume_ondisk_t ondisk; 88*a89aec1bSMatthew Dillon hammer_tid_t recid; 89*a89aec1bSMatthew Dillon 90*a89aec1bSMatthew Dillon ondisk = trans->rootvol->ondisk; 91*a89aec1bSMatthew Dillon recid = ++ondisk->vol0_recid; 92*a89aec1bSMatthew Dillon hammer_modify_volume(trans->rootvol); 93*a89aec1bSMatthew Dillon return(recid); 94*a89aec1bSMatthew Dillon } 95