Commit | Line | Data |
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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> |
b3b94faa DT |
16 | #include <asm/semaphore.h> |
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 DT |
27 | |
28 | int gfs2_trans_begin_i(struct gfs2_sbd *sdp, unsigned int blocks, | |
29 | unsigned int revokes, char *file, unsigned int line) | |
30 | { | |
31 | struct gfs2_trans *tr; | |
32 | int error; | |
33 | ||
5c676f6d | 34 | if (gfs2_assert_warn(sdp, !current->journal_info) || |
b3b94faa DT |
35 | gfs2_assert_warn(sdp, blocks || revokes)) { |
36 | fs_warn(sdp, "(%s, %u)\n", file, line); | |
37 | return -EINVAL; | |
38 | } | |
39 | ||
f55ab26a | 40 | tr = kzalloc(sizeof(struct gfs2_trans), GFP_NOFS); |
b3b94faa DT |
41 | if (!tr) |
42 | return -ENOMEM; | |
43 | ||
44 | tr->tr_file = file; | |
45 | tr->tr_line = line; | |
46 | tr->tr_blocks = blocks; | |
47 | tr->tr_revokes = revokes; | |
48 | tr->tr_reserved = 1; | |
49 | if (blocks) | |
50 | tr->tr_reserved += 1 + blocks; | |
51 | if (revokes) | |
52 | tr->tr_reserved += gfs2_struct2blk(sdp, revokes, | |
53 | sizeof(uint64_t)); | |
54 | INIT_LIST_HEAD(&tr->tr_list_buf); | |
55 | ||
e317ffcb SW |
56 | gfs2_holder_init(sdp->sd_trans_gl, LM_ST_SHARED, |
57 | GL_NEVER_RECURSE, &tr->tr_t_gh); | |
b3b94faa | 58 | |
e317ffcb | 59 | error = gfs2_glock_nq(&tr->tr_t_gh); |
b3b94faa | 60 | if (error) |
e317ffcb | 61 | goto fail_holder_uninit; |
b3b94faa DT |
62 | |
63 | if (!test_bit(SDF_JOURNAL_LIVE, &sdp->sd_flags)) { | |
e317ffcb | 64 | tr->tr_t_gh.gh_flags |= GL_NOCACHE; |
b3b94faa DT |
65 | error = -EROFS; |
66 | goto fail_gunlock; | |
67 | } | |
68 | ||
69 | error = gfs2_log_reserve(sdp, tr->tr_reserved); | |
70 | if (error) | |
71 | goto fail_gunlock; | |
72 | ||
5c676f6d | 73 | current->journal_info = tr; |
b3b94faa DT |
74 | |
75 | return 0; | |
76 | ||
77 | fail_gunlock: | |
e317ffcb | 78 | gfs2_glock_dq(&tr->tr_t_gh); |
b3b94faa | 79 | |
e317ffcb SW |
80 | fail_holder_uninit: |
81 | gfs2_holder_uninit(&tr->tr_t_gh); | |
b3b94faa DT |
82 | kfree(tr); |
83 | ||
84 | return error; | |
85 | } | |
86 | ||
87 | void gfs2_trans_end(struct gfs2_sbd *sdp) | |
88 | { | |
89 | struct gfs2_trans *tr; | |
b3b94faa | 90 | |
5c676f6d SW |
91 | tr = current->journal_info; |
92 | current->journal_info = NULL; | |
b3b94faa DT |
93 | |
94 | if (gfs2_assert_warn(sdp, tr)) | |
95 | return; | |
96 | ||
b3b94faa DT |
97 | if (!tr->tr_touched) { |
98 | gfs2_log_release(sdp, tr->tr_reserved); | |
b3b94faa | 99 | |
b4dc7291 SW |
100 | gfs2_glock_dq(&tr->tr_t_gh); |
101 | gfs2_holder_uninit(&tr->tr_t_gh); | |
b3b94faa | 102 | |
e317ffcb | 103 | kfree(tr); |
b3b94faa DT |
104 | return; |
105 | } | |
106 | ||
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); | |
117 | ||
118 | gfs2_log_commit(sdp, tr); | |
119 | ||
b4dc7291 SW |
120 | gfs2_glock_dq(&tr->tr_t_gh); |
121 | gfs2_holder_uninit(&tr->tr_t_gh); | |
122 | ||
123 | kfree(tr); | |
b3b94faa DT |
124 | |
125 | if (sdp->sd_vfs->s_flags & MS_SYNCHRONOUS) | |
126 | gfs2_log_flush(sdp); | |
127 | } | |
128 | ||
129 | void gfs2_trans_add_gl(struct gfs2_glock *gl) | |
130 | { | |
131 | lops_add(gl->gl_sbd, &gl->gl_le); | |
132 | } | |
133 | ||
134 | /** | |
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 | |
d4e9c4c3 | 138 | * @meta: True in the case of adding metadata |
b3b94faa DT |
139 | * |
140 | */ | |
141 | ||
d4e9c4c3 | 142 | void gfs2_trans_add_bh(struct gfs2_glock *gl, struct buffer_head *bh, int meta) |
b3b94faa DT |
143 | { |
144 | struct gfs2_sbd *sdp = gl->gl_sbd; | |
145 | struct gfs2_bufdata *bd; | |
146 | ||
5c676f6d | 147 | bd = bh->b_private; |
b3b94faa DT |
148 | if (bd) |
149 | gfs2_assert(sdp, bd->bd_gl == gl); | |
150 | else { | |
586dfdaa | 151 | gfs2_attach_bufdata(gl, bh, meta); |
5c676f6d | 152 | bd = bh->b_private; |
b3b94faa | 153 | } |
b3b94faa DT |
154 | lops_add(sdp, &bd->bd_le); |
155 | } | |
156 | ||
157 | void gfs2_trans_add_revoke(struct gfs2_sbd *sdp, uint64_t blkno) | |
158 | { | |
159 | struct gfs2_revoke *rv = kmalloc(sizeof(struct gfs2_revoke), | |
18ec7d5c | 160 | GFP_NOFS | __GFP_NOFAIL); |
b3b94faa DT |
161 | lops_init_le(&rv->rv_le, &gfs2_revoke_lops); |
162 | rv->rv_blkno = blkno; | |
163 | lops_add(sdp, &rv->rv_le); | |
164 | } | |
165 | ||
166 | void gfs2_trans_add_unrevoke(struct gfs2_sbd *sdp, uint64_t blkno) | |
167 | { | |
168 | struct gfs2_revoke *rv; | |
169 | int found = 0; | |
170 | ||
171 | gfs2_log_lock(sdp); | |
172 | ||
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--; | |
178 | found = 1; | |
179 | break; | |
180 | } | |
181 | } | |
182 | ||
183 | gfs2_log_unlock(sdp); | |
184 | ||
185 | if (found) { | |
5c676f6d | 186 | struct gfs2_trans *tr = current->journal_info; |
b3b94faa | 187 | kfree(rv); |
5c676f6d | 188 | tr->tr_num_revoke_rm++; |
b3b94faa DT |
189 | } |
190 | } | |
191 | ||
192 | void gfs2_trans_add_rg(struct gfs2_rgrpd *rgd) | |
193 | { | |
194 | lops_add(rgd->rd_sbd, &rgd->rd_le); | |
195 | } | |
196 |