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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 Whitehoused0dc80d2006-03-29 14:36:49 -050015#include <linux/kallsyms.h>
Steven Whitehousef057f6c2009-01-12 10:43:39 +000016#include <linux/gfs2_ondisk.h>
David Teiglandb3b94fa2006-01-16 16:50:04 +000017
18#include "gfs2.h"
Steven Whitehouse5c676f62006-02-27 17:23:27 -050019#include "incore.h"
David Teiglandb3b94fa2006-01-16 16:50:04 +000020#include "glock.h"
21#include "log.h"
22#include "lops.h"
23#include "meta_io.h"
24#include "trans.h"
Steven Whitehouse5c676f62006-02-27 17:23:27 -050025#include "util.h"
Benjamin Marzinski5e687ea2010-05-04 14:29:16 -050026#include "trace_gfs2.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 Whitehousea1c06432009-05-13 10:56:52 +010037 if (!test_bit(SDF_JOURNAL_LIVE, &sdp->sd_flags))
38 return -EROFS;
39
Steven Whitehousef55ab262006-02-21 12:51:39 +000040 tr = kzalloc(sizeof(struct gfs2_trans), GFP_NOFS);
David Teiglandb3b94fa2006-01-16 16:50:04 +000041 if (!tr)
42 return -ENOMEM;
43
Steven Whitehoused0dc80d2006-03-29 14:36:49 -050044 tr->tr_ip = (unsigned long)__builtin_return_address(0);
David Teiglandb3b94fa2006-01-16 16:50:04 +000045 tr->tr_blocks = blocks;
46 tr->tr_revokes = revokes;
47 tr->tr_reserved = 1;
48 if (blocks)
Steven Whitehousef4154ea2006-04-11 14:49:06 -040049 tr->tr_reserved += 6 + blocks;
David Teiglandb3b94fa2006-01-16 16:50:04 +000050 if (revokes)
51 tr->tr_reserved += gfs2_struct2blk(sdp, revokes,
Steven Whitehousecd915492006-09-04 12:49:07 -040052 sizeof(u64));
Jan Kara39263d5e2012-06-12 16:20:41 +020053 sb_start_intwrite(sdp->sd_vfs);
Steven Whitehouse579b78a2006-04-26 14:58:26 -040054 gfs2_holder_init(sdp->sd_trans_gl, LM_ST_SHARED, 0, &tr->tr_t_gh);
David Teiglandb3b94fa2006-01-16 16:50:04 +000055
Steven Whitehousee317ffc2006-03-01 11:39:37 -050056 error = gfs2_glock_nq(&tr->tr_t_gh);
David Teiglandb3b94fa2006-01-16 16:50:04 +000057 if (error)
Steven Whitehousee317ffc2006-03-01 11:39:37 -050058 goto fail_holder_uninit;
David Teiglandb3b94fa2006-01-16 16:50:04 +000059
David Teiglandb3b94fa2006-01-16 16:50:04 +000060 error = gfs2_log_reserve(sdp, tr->tr_reserved);
61 if (error)
62 goto fail_gunlock;
63
Steven Whitehouse5c676f62006-02-27 17:23:27 -050064 current->journal_info = tr;
David Teiglandb3b94fa2006-01-16 16:50:04 +000065
66 return 0;
67
Steven Whitehouse484adff2006-03-29 09:12:12 -050068fail_gunlock:
Steven Whitehousee317ffc2006-03-01 11:39:37 -050069 gfs2_glock_dq(&tr->tr_t_gh);
David Teiglandb3b94fa2006-01-16 16:50:04 +000070
Steven Whitehouse484adff2006-03-29 09:12:12 -050071fail_holder_uninit:
Jan Kara39263d5e2012-06-12 16:20:41 +020072 sb_end_intwrite(sdp->sd_vfs);
Steven Whitehousee317ffc2006-03-01 11:39:37 -050073 gfs2_holder_uninit(&tr->tr_t_gh);
David Teiglandb3b94fa2006-01-16 16:50:04 +000074 kfree(tr);
75
76 return error;
77}
78
Benjamin Marzinski5e687ea2010-05-04 14:29:16 -050079/**
80 * gfs2_log_release - Release a given number of log blocks
81 * @sdp: The GFS2 superblock
82 * @blks: The number of blocks
83 *
84 */
85
86static void gfs2_log_release(struct gfs2_sbd *sdp, unsigned int blks)
87{
88
89 atomic_add(blks, &sdp->sd_log_blks_free);
90 trace_gfs2_log_blocks(sdp, blks);
91 gfs2_assert_withdraw(sdp, atomic_read(&sdp->sd_log_blks_free) <=
92 sdp->sd_jdesc->jd_blocks);
93 up_read(&sdp->sd_log_flush_lock);
94}
95
Steven Whitehousec50b91c2012-04-16 16:40:56 +010096static void gfs2_print_trans(const struct gfs2_trans *tr)
97{
98 print_symbol(KERN_WARNING "GFS2: Transaction created at: %s\n", tr->tr_ip);
99 printk(KERN_WARNING "GFS2: blocks=%u revokes=%u reserved=%u touched=%d\n",
100 tr->tr_blocks, tr->tr_revokes, tr->tr_reserved, tr->tr_touched);
101 printk(KERN_WARNING "GFS2: Buf %u/%u Databuf %u/%u Revoke %u/%u\n",
102 tr->tr_num_buf_new, tr->tr_num_buf_rm,
103 tr->tr_num_databuf_new, tr->tr_num_databuf_rm,
104 tr->tr_num_revoke, tr->tr_num_revoke_rm);
105}
106
David Teiglandb3b94fa2006-01-16 16:50:04 +0000107void gfs2_trans_end(struct gfs2_sbd *sdp)
108{
Steven Whitehousef4154ea2006-04-11 14:49:06 -0400109 struct gfs2_trans *tr = current->journal_info;
Steven Whitehousec50b91c2012-04-16 16:40:56 +0100110 s64 nbuf;
Steven Whitehousef4154ea2006-04-11 14:49:06 -0400111 BUG_ON(!tr);
Steven Whitehouse5c676f62006-02-27 17:23:27 -0500112 current->journal_info = NULL;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000113
David Teiglandb3b94fa2006-01-16 16:50:04 +0000114 if (!tr->tr_touched) {
115 gfs2_log_release(sdp, tr->tr_reserved);
Steven Whitehoused8348de2009-02-05 10:12:38 +0000116 if (tr->tr_t_gh.gh_gl) {
117 gfs2_glock_dq(&tr->tr_t_gh);
118 gfs2_holder_uninit(&tr->tr_t_gh);
119 kfree(tr);
120 }
Jan Kara39263d5e2012-06-12 16:20:41 +0200121 sb_end_intwrite(sdp->sd_vfs);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000122 return;
123 }
124
Steven Whitehousec50b91c2012-04-16 16:40:56 +0100125 nbuf = tr->tr_num_buf_new + tr->tr_num_databuf_new;
126 nbuf -= tr->tr_num_buf_rm;
127 nbuf -= tr->tr_num_databuf_rm;
128
129 if (gfs2_assert_withdraw(sdp, (nbuf <= tr->tr_blocks) &&
130 (tr->tr_num_revoke <= tr->tr_revokes)))
131 gfs2_print_trans(tr);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000132
133 gfs2_log_commit(sdp, tr);
Steven Whitehoused8348de2009-02-05 10:12:38 +0000134 if (tr->tr_t_gh.gh_gl) {
135 gfs2_glock_dq(&tr->tr_t_gh);
136 gfs2_holder_uninit(&tr->tr_t_gh);
137 kfree(tr);
138 }
David Teiglandb3b94fa2006-01-16 16:50:04 +0000139
140 if (sdp->sd_vfs->s_flags & MS_SYNCHRONOUS)
Steven Whitehouseb09e5932006-04-07 11:17:32 -0400141 gfs2_log_flush(sdp, NULL);
Jan Kara39263d5e2012-06-12 16:20:41 +0200142 sb_end_intwrite(sdp->sd_vfs);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000143}
144
David Teiglandb3b94fa2006-01-16 16:50:04 +0000145/**
146 * gfs2_trans_add_bh - Add a to-be-modified buffer to the current transaction
147 * @gl: the glock the buffer belongs to
148 * @bh: The buffer to add
Steven Whitehoused4e9c4c2006-01-18 11:19:28 +0000149 * @meta: True in the case of adding metadata
David Teiglandb3b94fa2006-01-16 16:50:04 +0000150 *
151 */
152
Steven Whitehoused4e9c4c2006-01-18 11:19:28 +0000153void gfs2_trans_add_bh(struct gfs2_glock *gl, struct buffer_head *bh, int meta)
David Teiglandb3b94fa2006-01-16 16:50:04 +0000154{
155 struct gfs2_sbd *sdp = gl->gl_sbd;
156 struct gfs2_bufdata *bd;
157
Steven Whitehouse5c676f62006-02-27 17:23:27 -0500158 bd = bh->b_private;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000159 if (bd)
160 gfs2_assert(sdp, bd->bd_gl == gl);
161 else {
Steven Whitehouse586dfda2006-01-18 11:32:00 +0000162 gfs2_attach_bufdata(gl, bh, meta);
Steven Whitehouse5c676f62006-02-27 17:23:27 -0500163 bd = bh->b_private;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000164 }
Bob Petersonc0752aa2012-05-01 12:00:34 -0400165 lops_add(sdp, bd);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000166}
167
Steven Whitehouse1ad38c42007-09-03 11:01:33 +0100168void gfs2_trans_add_revoke(struct gfs2_sbd *sdp, struct gfs2_bufdata *bd)
David Teiglandb3b94fa2006-01-16 16:50:04 +0000169{
Bob Petersonc0752aa2012-05-01 12:00:34 -0400170 BUG_ON(!list_empty(&bd->bd_list));
Steven Whitehouse1ad38c42007-09-03 11:01:33 +0100171 BUG_ON(!list_empty(&bd->bd_ail_st_list));
172 BUG_ON(!list_empty(&bd->bd_ail_gl_list));
Bob Petersonc0752aa2012-05-01 12:00:34 -0400173 lops_init_le(bd, &gfs2_revoke_lops);
174 lops_add(sdp, bd);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000175}
176
Steven Whitehouse5731be52008-02-01 13:16:55 +0000177void gfs2_trans_add_unrevoke(struct gfs2_sbd *sdp, u64 blkno, unsigned int len)
David Teiglandb3b94fa2006-01-16 16:50:04 +0000178{
Steven Whitehouse5731be52008-02-01 13:16:55 +0000179 struct gfs2_bufdata *bd, *tmp;
180 struct gfs2_trans *tr = current->journal_info;
181 unsigned int n = len;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000182
183 gfs2_log_lock(sdp);
Bob Petersonc0752aa2012-05-01 12:00:34 -0400184 list_for_each_entry_safe(bd, tmp, &sdp->sd_log_le_revoke, bd_list) {
Steven Whitehouse5731be52008-02-01 13:16:55 +0000185 if ((bd->bd_blkno >= blkno) && (bd->bd_blkno < (blkno + len))) {
Bob Petersonc0752aa2012-05-01 12:00:34 -0400186 list_del_init(&bd->bd_list);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000187 gfs2_assert_withdraw(sdp, sdp->sd_log_num_revoke);
188 sdp->sd_log_num_revoke--;
Steven Whitehouse5731be52008-02-01 13:16:55 +0000189 kmem_cache_free(gfs2_bufdata_cachep, bd);
190 tr->tr_num_revoke_rm++;
191 if (--n == 0)
192 break;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000193 }
194 }
David Teiglandb3b94fa2006-01-16 16:50:04 +0000195 gfs2_log_unlock(sdp);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000196}
197