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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 <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
);