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 <asm/semaphore.h>
24 int gfs2_trans_begin_i(struct gfs2_sbd *sdp, unsigned int blocks,
25 unsigned int revokes, char *file, unsigned int line)
27 struct gfs2_trans *tr;
30 if (gfs2_assert_warn(sdp, !get_transaction) ||
31 gfs2_assert_warn(sdp, blocks || revokes)) {
32 fs_warn(sdp, "(%s, %u)\n", file, line);
36 tr = kzalloc(sizeof(struct gfs2_trans), GFP_KERNEL);
42 tr->tr_blocks = blocks;
43 tr->tr_revokes = revokes;
46 tr->tr_reserved += 1 + blocks;
48 tr->tr_reserved += gfs2_struct2blk(sdp, revokes,
50 INIT_LIST_HEAD(&tr->tr_list_buf);
53 tr->tr_t_gh = gfs2_holder_get(sdp->sd_trans_gl, LM_ST_SHARED,
54 GL_NEVER_RECURSE, GFP_KERNEL);
58 error = gfs2_glock_nq(tr->tr_t_gh);
62 if (!test_bit(SDF_JOURNAL_LIVE, &sdp->sd_flags)) {
63 tr->tr_t_gh->gh_flags |= GL_NOCACHE;
68 error = gfs2_log_reserve(sdp, tr->tr_reserved);
77 gfs2_glock_dq(tr->tr_t_gh);
80 gfs2_holder_put(tr->tr_t_gh);
88 void gfs2_trans_end(struct gfs2_sbd *sdp)
90 struct gfs2_trans *tr;
91 struct gfs2_holder *t_gh;
94 set_transaction(NULL);
96 if (gfs2_assert_warn(sdp, tr))
102 if (!tr->tr_touched) {
103 gfs2_log_release(sdp, tr->tr_reserved);
107 gfs2_holder_put(t_gh);
112 if (gfs2_assert_withdraw(sdp, tr->tr_num_buf <= tr->tr_blocks))
113 fs_err(sdp, "tr_num_buf = %u, tr_blocks = %u "
114 "tr_file = %s, tr_line = %u\n",
115 tr->tr_num_buf, tr->tr_blocks,
116 tr->tr_file, tr->tr_line);
117 if (gfs2_assert_withdraw(sdp, tr->tr_num_revoke <= tr->tr_revokes))
118 fs_err(sdp, "tr_num_revoke = %u, tr_revokes = %u "
119 "tr_file = %s, tr_line = %u\n",
120 tr->tr_num_revoke, tr->tr_revokes,
121 tr->tr_file, tr->tr_line);
123 gfs2_log_commit(sdp, tr);
126 gfs2_holder_put(t_gh);
128 if (sdp->sd_vfs->s_flags & MS_SYNCHRONOUS)
132 void gfs2_trans_add_gl(struct gfs2_glock *gl)
134 lops_add(gl->gl_sbd, &gl->gl_le);
138 * gfs2_trans_add_bh - Add a to-be-modified buffer to the current transaction
139 * @gl: the glock the buffer belongs to
140 * @bh: The buffer to add
141 * @meta: True in the case of adding metadata
145 void gfs2_trans_add_bh(struct gfs2_glock *gl, struct buffer_head *bh, int meta)
147 struct gfs2_sbd *sdp = gl->gl_sbd;
148 struct gfs2_bufdata *bd;
152 gfs2_assert(sdp, bd->bd_gl == gl);
154 gfs2_attach_bufdata(gl, bh, meta);
158 lops_add(sdp, &bd->bd_le);
161 void gfs2_trans_add_revoke(struct gfs2_sbd *sdp, uint64_t blkno)
163 struct gfs2_revoke *rv = kmalloc(sizeof(struct gfs2_revoke),
164 GFP_KERNEL | __GFP_NOFAIL);
165 lops_init_le(&rv->rv_le, &gfs2_revoke_lops);
166 rv->rv_blkno = blkno;
167 lops_add(sdp, &rv->rv_le);
170 void gfs2_trans_add_unrevoke(struct gfs2_sbd *sdp, uint64_t blkno)
172 struct gfs2_revoke *rv;
177 list_for_each_entry(rv, &sdp->sd_log_le_revoke, rv_le.le_list) {
178 if (rv->rv_blkno == blkno) {
179 list_del(&rv->rv_le.le_list);
180 gfs2_assert_withdraw(sdp, sdp->sd_log_num_revoke);
181 sdp->sd_log_num_revoke--;
187 gfs2_log_unlock(sdp);
191 get_transaction->tr_num_revoke_rm++;
195 void gfs2_trans_add_rg(struct gfs2_rgrpd *rgd)
197 lops_add(rgd->rd_sbd, &rgd->rd_le);
200 void gfs2_trans_add_databuf(struct gfs2_sbd *sdp, struct buffer_head *bh)
202 struct gfs2_databuf *db;
206 db = kmalloc(sizeof(struct gfs2_databuf),
207 GFP_KERNEL | __GFP_NOFAIL);
208 lops_init_le(&db->db_le, &gfs2_databuf_lops);
212 lops_add(sdp, &db->db_le);