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
144 void gfs2_trans_add_bh(struct gfs2_glock
*gl
, struct buffer_head
*bh
)
146 struct gfs2_sbd
*sdp
= gl
->gl_sbd
;
147 struct gfs2_bufdata
*bd
;
151 gfs2_assert(sdp
, bd
->bd_gl
== gl
);
153 gfs2_meta_attach_bufdata(gl
, bh
);
157 lops_add(sdp
, &bd
->bd_le
);
160 void gfs2_trans_add_revoke(struct gfs2_sbd
*sdp
, uint64_t blkno
)
162 struct gfs2_revoke
*rv
= kmalloc(sizeof(struct gfs2_revoke
),
163 GFP_KERNEL
| __GFP_NOFAIL
);
164 lops_init_le(&rv
->rv_le
, &gfs2_revoke_lops
);
165 rv
->rv_blkno
= blkno
;
166 lops_add(sdp
, &rv
->rv_le
);
169 void gfs2_trans_add_unrevoke(struct gfs2_sbd
*sdp
, uint64_t blkno
)
171 struct gfs2_revoke
*rv
;
176 list_for_each_entry(rv
, &sdp
->sd_log_le_revoke
, rv_le
.le_list
) {
177 if (rv
->rv_blkno
== blkno
) {
178 list_del(&rv
->rv_le
.le_list
);
179 gfs2_assert_withdraw(sdp
, sdp
->sd_log_num_revoke
);
180 sdp
->sd_log_num_revoke
--;
186 gfs2_log_unlock(sdp
);
190 get_transaction
->tr_num_revoke_rm
++;
194 void gfs2_trans_add_rg(struct gfs2_rgrpd
*rgd
)
196 lops_add(rgd
->rd_sbd
, &rgd
->rd_le
);
199 void gfs2_trans_add_databuf(struct gfs2_sbd
*sdp
, struct buffer_head
*bh
)
201 struct gfs2_databuf
*db
;
205 db
= kmalloc(sizeof(struct gfs2_databuf
),
206 GFP_KERNEL
| __GFP_NOFAIL
);
207 lops_init_le(&db
->db_le
, &gfs2_databuf_lops
);
211 lops_add(sdp
, &db
->db_le
);
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