2 * Copyright (c) 2007 The DragonFly Project. All rights reserved.
4 * This code is derived from software contributed to The DragonFly Project
5 * by Matthew Dillon <dillon@backplane.com>
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in
15 * the documentation and/or other materials provided with the
17 * 3. Neither the name of The DragonFly Project nor the names of its
18 * contributors may be used to endorse or promote products derived
19 * from this software without specific, prior written permission.
21 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
22 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
23 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
24 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
25 * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
26 * INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING,
27 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
28 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
29 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
30 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
31 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34 * $DragonFly: src/sys/vfs/hammer/hammer_transaction.c,v 1.9 2008/02/08 08:31:00 dillon Exp $
40 hammer_start_transaction(struct hammer_transaction *trans,
41 struct hammer_mount *hmp)
46 trans->rootvol = hammer_get_root_volume(hmp, &error);
48 trans->tid = hammer_alloc_tid(trans);
52 hammer_start_transaction_tid(struct hammer_transaction *trans,
53 struct hammer_mount *hmp, hammer_tid_t tid)
58 trans->rootvol = hammer_get_root_volume(hmp, &error);
64 hammer_abort_transaction(struct hammer_transaction *trans)
66 hammer_rel_volume(trans->rootvol, 0);
70 hammer_commit_transaction(struct hammer_transaction *trans)
72 hammer_rel_volume(trans->rootvol, 0);
76 * Note: Successive transaction ids must be at least 2 apart so the
77 * B-Tree code can make a separator that does not match either the
78 * left or right hand sides.
81 hammer_alloc_tid(hammer_transaction_t trans)
83 hammer_volume_ondisk_t ondisk;
88 tid = ts.tv_sec * 1000000000LL + ts.tv_nsec;
89 hammer_modify_volume(trans->rootvol, NULL, 0);
90 ondisk = trans->rootvol->ondisk;
91 if (tid < ondisk->vol0_next_tid)
92 tid = ondisk->vol0_next_tid;
93 if (tid == 0xFFFFFFFFFFFFFFFFULL)
94 panic("hammer_start_transaction: Ran out of TIDs!");
95 if (hammer_debug_tid) {
96 kprintf("alloc_tid %016llx (0x%08x)\n",
97 tid, (int)(tid / 1000000000LL));
99 ondisk->vol0_next_tid = tid + 2;