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git.proxmox.com Git - mirror_ubuntu-jammy-kernel.git/blob - fs/gfs2/trans.c
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
);