blob: f8dabf8446bb417000b556b53d5f29b7fc74e8fd [file] [log] [blame]
David Teiglandb3b94fa2006-01-16 16:50:04 +00001/*
2 * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
Steven Whitehouse3a8a9a12006-05-18 15:09:15 -04003 * Copyright (C) 2004-2006 Red Hat, Inc. All rights reserved.
David Teiglandb3b94fa2006-01-16 16:50:04 +00004 *
5 * This copyrighted material is made available to anyone wishing to use,
6 * modify, copy, or redistribute it subject to the terms and conditions
Steven Whitehousee9fc2aa2006-09-01 11:05:15 -04007 * of the GNU General Public License version 2.
David Teiglandb3b94fa2006-01-16 16:50:04 +00008 */
9
10#include <linux/sched.h>
11#include <linux/slab.h>
12#include <linux/spinlock.h>
13#include <linux/completion.h>
14#include <linux/buffer_head.h>
Steven Whitehouse5c676f62006-02-27 17:23:27 -050015#include <linux/gfs2_ondisk.h>
Steven Whitehoused0dc80d2006-03-29 14:36:49 -050016#include <linux/kallsyms.h>
Fabio Massimo Di Nitto7d308592006-09-19 07:56:29 +020017#include <linux/lm_interface.h>
David Teiglandb3b94fa2006-01-16 16:50:04 +000018
19#include "gfs2.h"
Steven Whitehouse5c676f62006-02-27 17:23:27 -050020#include "incore.h"
David Teiglandb3b94fa2006-01-16 16:50:04 +000021#include "glock.h"
22#include "log.h"
23#include "lops.h"
24#include "meta_io.h"
25#include "trans.h"
Steven Whitehouse5c676f62006-02-27 17:23:27 -050026#include "util.h"
David Teiglandb3b94fa2006-01-16 16:50:04 +000027
Steven Whitehoused0dc80d2006-03-29 14:36:49 -050028int gfs2_trans_begin(struct gfs2_sbd *sdp, unsigned int blocks,
29 unsigned int revokes)
David Teiglandb3b94fa2006-01-16 16:50:04 +000030{
31 struct gfs2_trans *tr;
32 int error;
33
Steven Whitehoused0dc80d2006-03-29 14:36:49 -050034 BUG_ON(current->journal_info);
35 BUG_ON(blocks == 0 && revokes == 0);
David Teiglandb3b94fa2006-01-16 16:50:04 +000036
Steven Whitehousef55ab262006-02-21 12:51:39 +000037 tr = kzalloc(sizeof(struct gfs2_trans), GFP_NOFS);
David Teiglandb3b94fa2006-01-16 16:50:04 +000038 if (!tr)
39 return -ENOMEM;
40
Steven Whitehoused0dc80d2006-03-29 14:36:49 -050041 tr->tr_ip = (unsigned long)__builtin_return_address(0);
David Teiglandb3b94fa2006-01-16 16:50:04 +000042 tr->tr_blocks = blocks;
43 tr->tr_revokes = revokes;
44 tr->tr_reserved = 1;
45 if (blocks)
Steven Whitehousef4154ea2006-04-11 14:49:06 -040046 tr->tr_reserved += 6 + blocks;
David Teiglandb3b94fa2006-01-16 16:50:04 +000047 if (revokes)
48 tr->tr_reserved += gfs2_struct2blk(sdp, revokes,
Steven Whitehousecd915492006-09-04 12:49:07 -040049 sizeof(u64));
David Teiglandb3b94fa2006-01-16 16:50:04 +000050 INIT_LIST_HEAD(&tr->tr_list_buf);
51
Steven Whitehouse579b78a2006-04-26 14:58:26 -040052 gfs2_holder_init(sdp->sd_trans_gl, LM_ST_SHARED, 0, &tr->tr_t_gh);
David Teiglandb3b94fa2006-01-16 16:50:04 +000053
Steven Whitehousee317ffc2006-03-01 11:39:37 -050054 error = gfs2_glock_nq(&tr->tr_t_gh);
David Teiglandb3b94fa2006-01-16 16:50:04 +000055 if (error)
Steven Whitehousee317ffc2006-03-01 11:39:37 -050056 goto fail_holder_uninit;
David Teiglandb3b94fa2006-01-16 16:50:04 +000057
58 if (!test_bit(SDF_JOURNAL_LIVE, &sdp->sd_flags)) {
Steven Whitehousee317ffc2006-03-01 11:39:37 -050059 tr->tr_t_gh.gh_flags |= GL_NOCACHE;
David Teiglandb3b94fa2006-01-16 16:50:04 +000060 error = -EROFS;
61 goto fail_gunlock;
62 }
63
64 error = gfs2_log_reserve(sdp, tr->tr_reserved);
65 if (error)
66 goto fail_gunlock;
67
Steven Whitehouse5c676f62006-02-27 17:23:27 -050068 current->journal_info = tr;
David Teiglandb3b94fa2006-01-16 16:50:04 +000069
70 return 0;
71
Steven Whitehouse484adff2006-03-29 09:12:12 -050072fail_gunlock:
Steven Whitehousee317ffc2006-03-01 11:39:37 -050073 gfs2_glock_dq(&tr->tr_t_gh);
David Teiglandb3b94fa2006-01-16 16:50:04 +000074
Steven Whitehouse484adff2006-03-29 09:12:12 -050075fail_holder_uninit:
Steven Whitehousee317ffc2006-03-01 11:39:37 -050076 gfs2_holder_uninit(&tr->tr_t_gh);
David Teiglandb3b94fa2006-01-16 16:50:04 +000077 kfree(tr);
78
79 return error;
80}
81
82void gfs2_trans_end(struct gfs2_sbd *sdp)
83{
Steven Whitehousef4154ea2006-04-11 14:49:06 -040084 struct gfs2_trans *tr = current->journal_info;
David Teiglandb3b94fa2006-01-16 16:50:04 +000085
Steven Whitehousef4154ea2006-04-11 14:49:06 -040086 BUG_ON(!tr);
Steven Whitehouse5c676f62006-02-27 17:23:27 -050087 current->journal_info = NULL;
David Teiglandb3b94fa2006-01-16 16:50:04 +000088
David Teiglandb3b94fa2006-01-16 16:50:04 +000089 if (!tr->tr_touched) {
90 gfs2_log_release(sdp, tr->tr_reserved);
Steven Whitehouseb4dc7292006-03-01 17:41:58 -050091 gfs2_glock_dq(&tr->tr_t_gh);
92 gfs2_holder_uninit(&tr->tr_t_gh);
Steven Whitehousee317ffc2006-03-01 11:39:37 -050093 kfree(tr);
David Teiglandb3b94fa2006-01-16 16:50:04 +000094 return;
95 }
96
Steven Whitehoused0dc80d2006-03-29 14:36:49 -050097 if (gfs2_assert_withdraw(sdp, tr->tr_num_buf <= tr->tr_blocks)) {
98 fs_err(sdp, "tr_num_buf = %u, tr_blocks = %u ",
99 tr->tr_num_buf, tr->tr_blocks);
100 print_symbol(KERN_WARNING "GFS2: Transaction created at: %s\n", tr->tr_ip);
101 }
Steven Whitehousecd456972006-03-30 11:10:12 -0500102 if (gfs2_assert_withdraw(sdp, tr->tr_num_revoke <= tr->tr_revokes)) {
Steven Whitehoused0dc80d2006-03-29 14:36:49 -0500103 fs_err(sdp, "tr_num_revoke = %u, tr_revokes = %u ",
104 tr->tr_num_revoke, tr->tr_revokes);
105 print_symbol(KERN_WARNING "GFS2: Transaction created at: %s\n", tr->tr_ip);
Steven Whitehousecd456972006-03-30 11:10:12 -0500106 }
David Teiglandb3b94fa2006-01-16 16:50:04 +0000107
108 gfs2_log_commit(sdp, tr);
Steven Whitehouseb4dc7292006-03-01 17:41:58 -0500109 gfs2_glock_dq(&tr->tr_t_gh);
110 gfs2_holder_uninit(&tr->tr_t_gh);
Steven Whitehouseb4dc7292006-03-01 17:41:58 -0500111 kfree(tr);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000112
113 if (sdp->sd_vfs->s_flags & MS_SYNCHRONOUS)
Steven Whitehouseb09e5932006-04-07 11:17:32 -0400114 gfs2_log_flush(sdp, NULL);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000115}
116
117void gfs2_trans_add_gl(struct gfs2_glock *gl)
118{
119 lops_add(gl->gl_sbd, &gl->gl_le);
120}
121
122/**
123 * gfs2_trans_add_bh - Add a to-be-modified buffer to the current transaction
124 * @gl: the glock the buffer belongs to
125 * @bh: The buffer to add
Steven Whitehoused4e9c4c2006-01-18 11:19:28 +0000126 * @meta: True in the case of adding metadata
David Teiglandb3b94fa2006-01-16 16:50:04 +0000127 *
128 */
129
Steven Whitehoused4e9c4c2006-01-18 11:19:28 +0000130void gfs2_trans_add_bh(struct gfs2_glock *gl, struct buffer_head *bh, int meta)
David Teiglandb3b94fa2006-01-16 16:50:04 +0000131{
132 struct gfs2_sbd *sdp = gl->gl_sbd;
133 struct gfs2_bufdata *bd;
134
Steven Whitehouse5c676f62006-02-27 17:23:27 -0500135 bd = bh->b_private;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000136 if (bd)
137 gfs2_assert(sdp, bd->bd_gl == gl);
138 else {
Steven Whitehouse586dfda2006-01-18 11:32:00 +0000139 gfs2_attach_bufdata(gl, bh, meta);
Steven Whitehouse5c676f62006-02-27 17:23:27 -0500140 bd = bh->b_private;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000141 }
David Teiglandb3b94fa2006-01-16 16:50:04 +0000142 lops_add(sdp, &bd->bd_le);
143}
144
Steven Whitehousecd915492006-09-04 12:49:07 -0400145void gfs2_trans_add_revoke(struct gfs2_sbd *sdp, u64 blkno)
David Teiglandb3b94fa2006-01-16 16:50:04 +0000146{
147 struct gfs2_revoke *rv = kmalloc(sizeof(struct gfs2_revoke),
Steven Whitehouse18ec7d52006-02-08 11:50:51 +0000148 GFP_NOFS | __GFP_NOFAIL);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000149 lops_init_le(&rv->rv_le, &gfs2_revoke_lops);
150 rv->rv_blkno = blkno;
151 lops_add(sdp, &rv->rv_le);
152}
153
Steven Whitehousecd915492006-09-04 12:49:07 -0400154void gfs2_trans_add_unrevoke(struct gfs2_sbd *sdp, u64 blkno)
David Teiglandb3b94fa2006-01-16 16:50:04 +0000155{
156 struct gfs2_revoke *rv;
157 int found = 0;
158
159 gfs2_log_lock(sdp);
160
161 list_for_each_entry(rv, &sdp->sd_log_le_revoke, rv_le.le_list) {
162 if (rv->rv_blkno == blkno) {
163 list_del(&rv->rv_le.le_list);
164 gfs2_assert_withdraw(sdp, sdp->sd_log_num_revoke);
165 sdp->sd_log_num_revoke--;
166 found = 1;
167 break;
168 }
169 }
170
171 gfs2_log_unlock(sdp);
172
173 if (found) {
Steven Whitehouse5c676f62006-02-27 17:23:27 -0500174 struct gfs2_trans *tr = current->journal_info;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000175 kfree(rv);
Steven Whitehouse5c676f62006-02-27 17:23:27 -0500176 tr->tr_num_revoke_rm++;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000177 }
178}
179
180void gfs2_trans_add_rg(struct gfs2_rgrpd *rgd)
181{
182 lops_add(rgd->rd_sbd, &rgd->rd_le);
183}
184