2 * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
3 * Copyright (C) 2004-2005 Red Hat, Inc. All rights reserved.
5 * This copyrighted material is made available to anyone wishing to use,
6 * modify, copy, or redistribute it subject to the terms and conditions
7 * of the GNU General Public License v.2.
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>
15 #include <linux/gfs2_ondisk.h>
16 #include <linux/kallsyms.h>
17 #include <asm/semaphore.h>
20 #include "lm_interface.h"
29 int gfs2_trans_begin(struct gfs2_sbd *sdp, unsigned int blocks,
32 struct gfs2_trans *tr;
35 BUG_ON(current->journal_info);
36 BUG_ON(blocks == 0 && revokes == 0);
38 tr = kzalloc(sizeof(struct gfs2_trans), GFP_NOFS);
42 tr->tr_ip = (unsigned long)__builtin_return_address(0);
43 tr->tr_blocks = blocks;
44 tr->tr_revokes = revokes;
47 tr->tr_reserved += 6 + blocks;
49 tr->tr_reserved += gfs2_struct2blk(sdp, revokes,
51 INIT_LIST_HEAD(&tr->tr_list_buf);
53 gfs2_holder_init(sdp->sd_trans_gl, LM_ST_SHARED,
54 GL_NEVER_RECURSE, &tr->tr_t_gh);
56 error = gfs2_glock_nq(&tr->tr_t_gh);
58 goto fail_holder_uninit;
60 if (!test_bit(SDF_JOURNAL_LIVE, &sdp->sd_flags)) {
61 tr->tr_t_gh.gh_flags |= GL_NOCACHE;
66 error = gfs2_log_reserve(sdp, tr->tr_reserved);
70 current->journal_info = tr;
75 gfs2_glock_dq(&tr->tr_t_gh);
78 gfs2_holder_uninit(&tr->tr_t_gh);
84 void gfs2_trans_end(struct gfs2_sbd *sdp)
86 struct gfs2_trans *tr = current->journal_info;
89 current->journal_info = NULL;
91 if (!tr->tr_touched) {
92 gfs2_log_release(sdp, tr->tr_reserved);
93 gfs2_glock_dq(&tr->tr_t_gh);
94 gfs2_holder_uninit(&tr->tr_t_gh);
99 if (gfs2_assert_withdraw(sdp, tr->tr_num_buf <= tr->tr_blocks)) {
100 fs_err(sdp, "tr_num_buf = %u, tr_blocks = %u ",
101 tr->tr_num_buf, tr->tr_blocks);
102 print_symbol(KERN_WARNING "GFS2: Transaction created at: %s\n", tr->tr_ip);
104 if (gfs2_assert_withdraw(sdp, tr->tr_num_revoke <= tr->tr_revokes)) {
105 fs_err(sdp, "tr_num_revoke = %u, tr_revokes = %u ",
106 tr->tr_num_revoke, tr->tr_revokes);
107 print_symbol(KERN_WARNING "GFS2: Transaction created at: %s\n", tr->tr_ip);
110 gfs2_log_commit(sdp, tr);
111 gfs2_glock_dq(&tr->tr_t_gh);
112 gfs2_holder_uninit(&tr->tr_t_gh);
115 if (sdp->sd_vfs->s_flags & MS_SYNCHRONOUS)
116 gfs2_log_flush(sdp, NULL);
119 void gfs2_trans_add_gl(struct gfs2_glock *gl)
121 lops_add(gl->gl_sbd, &gl->gl_le);
125 * gfs2_trans_add_bh - Add a to-be-modified buffer to the current transaction
126 * @gl: the glock the buffer belongs to
127 * @bh: The buffer to add
128 * @meta: True in the case of adding metadata
132 void gfs2_trans_add_bh(struct gfs2_glock *gl, struct buffer_head *bh, int meta)
134 struct gfs2_sbd *sdp = gl->gl_sbd;
135 struct gfs2_bufdata *bd;
139 gfs2_assert(sdp, bd->bd_gl == gl);
141 gfs2_attach_bufdata(gl, bh, meta);
144 lops_add(sdp, &bd->bd_le);
147 void gfs2_trans_add_revoke(struct gfs2_sbd *sdp, uint64_t blkno)
149 struct gfs2_revoke *rv = kmalloc(sizeof(struct gfs2_revoke),
150 GFP_NOFS | __GFP_NOFAIL);
151 lops_init_le(&rv->rv_le, &gfs2_revoke_lops);
152 rv->rv_blkno = blkno;
153 lops_add(sdp, &rv->rv_le);
156 void gfs2_trans_add_unrevoke(struct gfs2_sbd *sdp, uint64_t blkno)
158 struct gfs2_revoke *rv;
163 list_for_each_entry(rv, &sdp->sd_log_le_revoke, rv_le.le_list) {
164 if (rv->rv_blkno == blkno) {
165 list_del(&rv->rv_le.le_list);
166 gfs2_assert_withdraw(sdp, sdp->sd_log_num_revoke);
167 sdp->sd_log_num_revoke--;
173 gfs2_log_unlock(sdp);
176 struct gfs2_trans *tr = current->journal_info;
178 tr->tr_num_revoke_rm++;
182 void gfs2_trans_add_rg(struct gfs2_rgrpd *rgd)
184 lops_add(rgd->rd_sbd, &rgd->rd_le);