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b3b94faa DT |
1 | /* |
2 | * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved. | |
3 | * Copyright (C) 2004-2005 Red Hat, Inc. All rights reserved. | |
4 | * | |
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. | |
8 | */ | |
9 | ||
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> | |
5c676f6d | 15 | #include <linux/gfs2_ondisk.h> |
d0dc80db | 16 | #include <linux/kallsyms.h> |
b3b94faa DT |
17 | |
18 | #include "gfs2.h" | |
5c676f6d SW |
19 | #include "lm_interface.h" |
20 | #include "incore.h" | |
b3b94faa DT |
21 | #include "glock.h" |
22 | #include "log.h" | |
23 | #include "lops.h" | |
24 | #include "meta_io.h" | |
25 | #include "trans.h" | |
5c676f6d | 26 | #include "util.h" |
b3b94faa | 27 | |
d0dc80db SW |
28 | int gfs2_trans_begin(struct gfs2_sbd *sdp, unsigned int blocks, |
29 | unsigned int revokes) | |
b3b94faa DT |
30 | { |
31 | struct gfs2_trans *tr; | |
32 | int error; | |
33 | ||
d0dc80db SW |
34 | BUG_ON(current->journal_info); |
35 | BUG_ON(blocks == 0 && revokes == 0); | |
b3b94faa | 36 | |
f55ab26a | 37 | tr = kzalloc(sizeof(struct gfs2_trans), GFP_NOFS); |
b3b94faa DT |
38 | if (!tr) |
39 | return -ENOMEM; | |
40 | ||
d0dc80db | 41 | tr->tr_ip = (unsigned long)__builtin_return_address(0); |
b3b94faa DT |
42 | tr->tr_blocks = blocks; |
43 | tr->tr_revokes = revokes; | |
44 | tr->tr_reserved = 1; | |
45 | if (blocks) | |
f4154ea0 | 46 | tr->tr_reserved += 6 + blocks; |
b3b94faa DT |
47 | if (revokes) |
48 | tr->tr_reserved += gfs2_struct2blk(sdp, revokes, | |
49 | sizeof(uint64_t)); | |
50 | INIT_LIST_HEAD(&tr->tr_list_buf); | |
51 | ||
579b78a4 | 52 | gfs2_holder_init(sdp->sd_trans_gl, LM_ST_SHARED, 0, &tr->tr_t_gh); |
b3b94faa | 53 | |
e317ffcb | 54 | error = gfs2_glock_nq(&tr->tr_t_gh); |
b3b94faa | 55 | if (error) |
e317ffcb | 56 | goto fail_holder_uninit; |
b3b94faa DT |
57 | |
58 | if (!test_bit(SDF_JOURNAL_LIVE, &sdp->sd_flags)) { | |
e317ffcb | 59 | tr->tr_t_gh.gh_flags |= GL_NOCACHE; |
b3b94faa DT |
60 | error = -EROFS; |
61 | goto fail_gunlock; | |
62 | } | |
63 | ||
64 | error = gfs2_log_reserve(sdp, tr->tr_reserved); | |
65 | if (error) | |
66 | goto fail_gunlock; | |
67 | ||
5c676f6d | 68 | current->journal_info = tr; |
b3b94faa DT |
69 | |
70 | return 0; | |
71 | ||
484adff8 | 72 | fail_gunlock: |
e317ffcb | 73 | gfs2_glock_dq(&tr->tr_t_gh); |
b3b94faa | 74 | |
484adff8 | 75 | fail_holder_uninit: |
e317ffcb | 76 | gfs2_holder_uninit(&tr->tr_t_gh); |
b3b94faa DT |
77 | kfree(tr); |
78 | ||
79 | return error; | |
80 | } | |
81 | ||
82 | void gfs2_trans_end(struct gfs2_sbd *sdp) | |
83 | { | |
f4154ea0 | 84 | struct gfs2_trans *tr = current->journal_info; |
b3b94faa | 85 | |
f4154ea0 | 86 | BUG_ON(!tr); |
5c676f6d | 87 | current->journal_info = NULL; |
b3b94faa | 88 | |
b3b94faa DT |
89 | if (!tr->tr_touched) { |
90 | gfs2_log_release(sdp, tr->tr_reserved); | |
b4dc7291 SW |
91 | gfs2_glock_dq(&tr->tr_t_gh); |
92 | gfs2_holder_uninit(&tr->tr_t_gh); | |
e317ffcb | 93 | kfree(tr); |
b3b94faa DT |
94 | return; |
95 | } | |
96 | ||
d0dc80db SW |
97 | if (gfs2_assert_withdraw(sdp, tr->tr_num_buf <= tr->tr_blocks)) { |
98 | fs_err(sdp, "tr_num_buf = %u, tr_blocks = %u ", | |
99 | tr->tr_num_buf, tr->tr_blocks); | |
100 | print_symbol(KERN_WARNING "GFS2: Transaction created at: %s\n", tr->tr_ip); | |
101 | } | |
cd45697f | 102 | if (gfs2_assert_withdraw(sdp, tr->tr_num_revoke <= tr->tr_revokes)) { |
d0dc80db SW |
103 | fs_err(sdp, "tr_num_revoke = %u, tr_revokes = %u ", |
104 | tr->tr_num_revoke, tr->tr_revokes); | |
105 | print_symbol(KERN_WARNING "GFS2: Transaction created at: %s\n", tr->tr_ip); | |
cd45697f | 106 | } |
b3b94faa DT |
107 | |
108 | gfs2_log_commit(sdp, tr); | |
b4dc7291 SW |
109 | gfs2_glock_dq(&tr->tr_t_gh); |
110 | gfs2_holder_uninit(&tr->tr_t_gh); | |
b4dc7291 | 111 | kfree(tr); |
b3b94faa DT |
112 | |
113 | if (sdp->sd_vfs->s_flags & MS_SYNCHRONOUS) | |
b09e593d | 114 | gfs2_log_flush(sdp, NULL); |
b3b94faa DT |
115 | } |
116 | ||
117 | void gfs2_trans_add_gl(struct gfs2_glock *gl) | |
118 | { | |
119 | lops_add(gl->gl_sbd, &gl->gl_le); | |
120 | } | |
121 | ||
122 | /** | |
123 | * gfs2_trans_add_bh - Add a to-be-modified buffer to the current transaction | |
124 | * @gl: the glock the buffer belongs to | |
125 | * @bh: The buffer to add | |
d4e9c4c3 | 126 | * @meta: True in the case of adding metadata |
b3b94faa DT |
127 | * |
128 | */ | |
129 | ||
d4e9c4c3 | 130 | void gfs2_trans_add_bh(struct gfs2_glock *gl, struct buffer_head *bh, int meta) |
b3b94faa DT |
131 | { |
132 | struct gfs2_sbd *sdp = gl->gl_sbd; | |
133 | struct gfs2_bufdata *bd; | |
134 | ||
5c676f6d | 135 | bd = bh->b_private; |
b3b94faa DT |
136 | if (bd) |
137 | gfs2_assert(sdp, bd->bd_gl == gl); | |
138 | else { | |
586dfdaa | 139 | gfs2_attach_bufdata(gl, bh, meta); |
5c676f6d | 140 | bd = bh->b_private; |
b3b94faa | 141 | } |
b3b94faa DT |
142 | lops_add(sdp, &bd->bd_le); |
143 | } | |
144 | ||
145 | void gfs2_trans_add_revoke(struct gfs2_sbd *sdp, uint64_t blkno) | |
146 | { | |
147 | struct gfs2_revoke *rv = kmalloc(sizeof(struct gfs2_revoke), | |
18ec7d5c | 148 | GFP_NOFS | __GFP_NOFAIL); |
b3b94faa DT |
149 | lops_init_le(&rv->rv_le, &gfs2_revoke_lops); |
150 | rv->rv_blkno = blkno; | |
151 | lops_add(sdp, &rv->rv_le); | |
152 | } | |
153 | ||
154 | void gfs2_trans_add_unrevoke(struct gfs2_sbd *sdp, uint64_t blkno) | |
155 | { | |
156 | struct gfs2_revoke *rv; | |
157 | int found = 0; | |
158 | ||
159 | gfs2_log_lock(sdp); | |
160 | ||
161 | list_for_each_entry(rv, &sdp->sd_log_le_revoke, rv_le.le_list) { | |
162 | if (rv->rv_blkno == blkno) { | |
163 | list_del(&rv->rv_le.le_list); | |
164 | gfs2_assert_withdraw(sdp, sdp->sd_log_num_revoke); | |
165 | sdp->sd_log_num_revoke--; | |
166 | found = 1; | |
167 | break; | |
168 | } | |
169 | } | |
170 | ||
171 | gfs2_log_unlock(sdp); | |
172 | ||
173 | if (found) { | |
5c676f6d | 174 | struct gfs2_trans *tr = current->journal_info; |
b3b94faa | 175 | kfree(rv); |
5c676f6d | 176 | tr->tr_num_revoke_rm++; |
b3b94faa DT |
177 | } |
178 | } | |
179 | ||
180 | void gfs2_trans_add_rg(struct gfs2_rgrpd *rgd) | |
181 | { | |
182 | lops_add(rgd->rd_sbd, &rgd->rd_le); | |
183 | } | |
184 |