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*d113fda1SMatthew Dillon * $DragonFly: src/sys/vfs/hammer/hammer_transaction.c,v 1.6 2008/01/01 01:00:03 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 { 43a89aec1bSMatthew Dillon int error; 4466325755SMatthew Dillon 4566325755SMatthew Dillon trans->hmp = hmp; 46a89aec1bSMatthew Dillon trans->rootvol = hammer_get_root_volume(hmp, &error); 47a89aec1bSMatthew Dillon KKASSERT(error == 0); 48a89aec1bSMatthew Dillon trans->tid = hammer_alloc_tid(trans); 4966325755SMatthew Dillon } 5066325755SMatthew Dillon 5166325755SMatthew Dillon void 52*d113fda1SMatthew Dillon hammer_start_transaction_tid(struct hammer_transaction *trans, 53*d113fda1SMatthew Dillon struct hammer_mount *hmp, hammer_tid_t tid) 54*d113fda1SMatthew Dillon { 55*d113fda1SMatthew Dillon int error; 56*d113fda1SMatthew Dillon 57*d113fda1SMatthew Dillon trans->hmp = hmp; 58*d113fda1SMatthew Dillon trans->rootvol = hammer_get_root_volume(hmp, &error); 59*d113fda1SMatthew Dillon KKASSERT(error == 0); 60*d113fda1SMatthew Dillon trans->tid = tid; 61*d113fda1SMatthew Dillon } 62*d113fda1SMatthew Dillon 63*d113fda1SMatthew Dillon void 6466325755SMatthew Dillon hammer_abort_transaction(struct hammer_transaction *trans) 6566325755SMatthew Dillon { 66a89aec1bSMatthew Dillon hammer_rel_volume(trans->rootvol, 0); 6766325755SMatthew Dillon } 6866325755SMatthew Dillon 6966325755SMatthew Dillon void 7066325755SMatthew Dillon hammer_commit_transaction(struct hammer_transaction *trans) 7166325755SMatthew Dillon { 72a89aec1bSMatthew Dillon hammer_rel_volume(trans->rootvol, 0); 7366325755SMatthew Dillon } 7466325755SMatthew Dillon 75*d113fda1SMatthew Dillon /* 76*d113fda1SMatthew Dillon * Note: Successive transaction ids must be at least 2 apart so the 77*d113fda1SMatthew Dillon * B-Tree code can make a separator that does not match either the 78*d113fda1SMatthew Dillon * left or right hand sides. 79*d113fda1SMatthew Dillon */ 80a89aec1bSMatthew Dillon hammer_tid_t 81a89aec1bSMatthew Dillon hammer_alloc_tid(hammer_transaction_t trans) 82a89aec1bSMatthew Dillon { 83a89aec1bSMatthew Dillon hammer_volume_ondisk_t ondisk; 84a89aec1bSMatthew Dillon struct timespec ts; 85a89aec1bSMatthew Dillon hammer_tid_t tid; 86a89aec1bSMatthew Dillon 87a89aec1bSMatthew Dillon getnanotime(&ts); 88a89aec1bSMatthew Dillon tid = ts.tv_sec * 1000000000LL + ts.tv_nsec; 890b075555SMatthew Dillon hammer_modify_volume(trans->rootvol); 90a89aec1bSMatthew Dillon ondisk = trans->rootvol->ondisk; 91a89aec1bSMatthew Dillon if (tid < ondisk->vol0_nexttid) 92a89aec1bSMatthew Dillon tid = ondisk->vol0_nexttid; 93a89aec1bSMatthew Dillon if (tid == 0xFFFFFFFFFFFFFFFFULL) 94a89aec1bSMatthew Dillon panic("hammer_start_transaction: Ran out of TIDs!"); 95*d113fda1SMatthew Dillon if (hammer_debug_tid) { 96*d113fda1SMatthew Dillon kprintf("alloc_tid %016llx (0x%08x)\n", 97*d113fda1SMatthew Dillon tid, (int)(tid / 1000000000LL)); 98*d113fda1SMatthew Dillon } 99*d113fda1SMatthew Dillon ondisk->vol0_nexttid = tid + 2; 1000b075555SMatthew Dillon hammer_modify_volume_done(trans->rootvol); 101a89aec1bSMatthew Dillon 102a89aec1bSMatthew Dillon return(tid); 103a89aec1bSMatthew Dillon } 104a89aec1bSMatthew Dillon 105a89aec1bSMatthew Dillon hammer_tid_t 106a89aec1bSMatthew Dillon hammer_alloc_recid(hammer_transaction_t trans) 107a89aec1bSMatthew Dillon { 108a89aec1bSMatthew Dillon hammer_volume_ondisk_t ondisk; 109a89aec1bSMatthew Dillon hammer_tid_t recid; 110a89aec1bSMatthew Dillon 1110b075555SMatthew Dillon hammer_modify_volume(trans->rootvol); 112a89aec1bSMatthew Dillon ondisk = trans->rootvol->ondisk; 113a89aec1bSMatthew Dillon recid = ++ondisk->vol0_recid; 1140b075555SMatthew Dillon hammer_modify_volume_done(trans->rootvol); 115a89aec1bSMatthew Dillon return(recid); 116a89aec1bSMatthew Dillon } 117