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 <asm/semaphore.h>
19 #include "lm_interface.h"
28 int gfs2_trans_begin_i(struct gfs2_sbd *sdp, unsigned int blocks,
29 unsigned int revokes, char *file, unsigned int line)
31 struct gfs2_trans *tr;
34 if (gfs2_assert_warn(sdp, !current->journal_info) ||
35 gfs2_assert_warn(sdp, blocks || revokes)) {
36 fs_warn(sdp, "(%s, %u)\n", file, line);
40 tr = kzalloc(sizeof(struct gfs2_trans), GFP_NOFS);
46 tr->tr_blocks = blocks;
47 tr->tr_revokes = revokes;
50 tr->tr_reserved += 1 + blocks;
52 tr->tr_reserved += gfs2_struct2blk(sdp, revokes,
54 INIT_LIST_HEAD(&tr->tr_list_buf);
56 gfs2_holder_init(sdp->sd_trans_gl, LM_ST_SHARED,
57 GL_NEVER_RECURSE, &tr->tr_t_gh);
59 error = gfs2_glock_nq(&tr->tr_t_gh);
61 goto fail_holder_uninit;
63 if (!test_bit(SDF_JOURNAL_LIVE, &sdp->sd_flags)) {
64 tr->tr_t_gh.gh_flags |= GL_NOCACHE;
69 error = gfs2_log_reserve(sdp, tr->tr_reserved);
73 current->journal_info = tr;
78 gfs2_glock_dq(&tr->tr_t_gh);
81 gfs2_holder_uninit(&tr->tr_t_gh);
87 void gfs2_trans_end(struct gfs2_sbd *sdp)
89 struct gfs2_trans *tr;
91 tr = current->journal_info;
92 current->journal_info = NULL;
94 if (gfs2_assert_warn(sdp, tr))
97 if (!tr->tr_touched) {
98 gfs2_log_release(sdp, tr->tr_reserved);
100 gfs2_glock_dq(&tr->tr_t_gh);
101 gfs2_holder_uninit(&tr->tr_t_gh);
107 if (gfs2_assert_withdraw(sdp, tr->tr_num_buf <= tr->tr_blocks))
108 fs_err(sdp, "tr_num_buf = %u, tr_blocks = %u "
109 "tr_file = %s, tr_line = %u\n",
110 tr->tr_num_buf, tr->tr_blocks,
111 tr->tr_file, tr->tr_line);
112 if (gfs2_assert_withdraw(sdp, tr->tr_num_revoke <= tr->tr_revokes))
113 fs_err(sdp, "tr_num_revoke = %u, tr_revokes = %u "
114 "tr_file = %s, tr_line = %u\n",
115 tr->tr_num_revoke, tr->tr_revokes,
116 tr->tr_file, tr->tr_line);
118 gfs2_log_commit(sdp, tr);
120 gfs2_glock_dq(&tr->tr_t_gh);
121 gfs2_holder_uninit(&tr->tr_t_gh);
125 if (sdp->sd_vfs->s_flags & MS_SYNCHRONOUS)
129 void gfs2_trans_add_gl(struct gfs2_glock *gl)
131 lops_add(gl->gl_sbd, &gl->gl_le);
135 * gfs2_trans_add_bh - Add a to-be-modified buffer to the current transaction
136 * @gl: the glock the buffer belongs to
137 * @bh: The buffer to add
138 * @meta: True in the case of adding metadata
142 void gfs2_trans_add_bh(struct gfs2_glock *gl, struct buffer_head *bh, int meta)
144 struct gfs2_sbd *sdp = gl->gl_sbd;
145 struct gfs2_bufdata *bd;
149 gfs2_assert(sdp, bd->bd_gl == gl);
151 gfs2_attach_bufdata(gl, bh, meta);
154 lops_add(sdp, &bd->bd_le);
157 void gfs2_trans_add_revoke(struct gfs2_sbd *sdp, uint64_t blkno)
159 struct gfs2_revoke *rv = kmalloc(sizeof(struct gfs2_revoke),
160 GFP_NOFS | __GFP_NOFAIL);
161 lops_init_le(&rv->rv_le, &gfs2_revoke_lops);
162 rv->rv_blkno = blkno;
163 lops_add(sdp, &rv->rv_le);
166 void gfs2_trans_add_unrevoke(struct gfs2_sbd *sdp, uint64_t blkno)
168 struct gfs2_revoke *rv;
173 list_for_each_entry(rv, &sdp->sd_log_le_revoke, rv_le.le_list) {
174 if (rv->rv_blkno == blkno) {
175 list_del(&rv->rv_le.le_list);
176 gfs2_assert_withdraw(sdp, sdp->sd_log_num_revoke);
177 sdp->sd_log_num_revoke--;
183 gfs2_log_unlock(sdp);
186 struct gfs2_trans *tr = current->journal_info;
188 tr->tr_num_revoke_rm++;
192 void gfs2_trans_add_rg(struct gfs2_rgrpd *rgd)
194 lops_add(rgd->rd_sbd, &rgd->rd_le);