Commit | Line | Data |
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b3b94faa DT |
1 | /* |
2 | * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved. | |
3a8a9a10 | 3 | * Copyright (C) 2004-2006 Red Hat, Inc. All rights reserved. |
b3b94faa DT |
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 | |
e9fc2aa0 | 7 | * of the GNU General Public License version 2. |
b3b94faa DT |
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> | |
d0dc80db | 15 | #include <linux/kallsyms.h> |
f057f6cd | 16 | #include <linux/gfs2_ondisk.h> |
b3b94faa DT |
17 | |
18 | #include "gfs2.h" | |
5c676f6d | 19 | #include "incore.h" |
b3b94faa DT |
20 | #include "glock.h" |
21 | #include "log.h" | |
22 | #include "lops.h" | |
23 | #include "meta_io.h" | |
24 | #include "trans.h" | |
5c676f6d | 25 | #include "util.h" |
b3b94faa | 26 | |
d0dc80db SW |
27 | int gfs2_trans_begin(struct gfs2_sbd *sdp, unsigned int blocks, |
28 | unsigned int revokes) | |
b3b94faa DT |
29 | { |
30 | struct gfs2_trans *tr; | |
31 | int error; | |
32 | ||
d0dc80db SW |
33 | BUG_ON(current->journal_info); |
34 | BUG_ON(blocks == 0 && revokes == 0); | |
b3b94faa | 35 | |
f55ab26a | 36 | tr = kzalloc(sizeof(struct gfs2_trans), GFP_NOFS); |
b3b94faa DT |
37 | if (!tr) |
38 | return -ENOMEM; | |
39 | ||
d0dc80db | 40 | tr->tr_ip = (unsigned long)__builtin_return_address(0); |
b3b94faa DT |
41 | tr->tr_blocks = blocks; |
42 | tr->tr_revokes = revokes; | |
43 | tr->tr_reserved = 1; | |
44 | if (blocks) | |
f4154ea0 | 45 | tr->tr_reserved += 6 + blocks; |
b3b94faa DT |
46 | if (revokes) |
47 | tr->tr_reserved += gfs2_struct2blk(sdp, revokes, | |
cd915493 | 48 | sizeof(u64)); |
b3b94faa DT |
49 | INIT_LIST_HEAD(&tr->tr_list_buf); |
50 | ||
579b78a4 | 51 | gfs2_holder_init(sdp->sd_trans_gl, LM_ST_SHARED, 0, &tr->tr_t_gh); |
b3b94faa | 52 | |
e317ffcb | 53 | error = gfs2_glock_nq(&tr->tr_t_gh); |
b3b94faa | 54 | if (error) |
e317ffcb | 55 | goto fail_holder_uninit; |
b3b94faa DT |
56 | |
57 | if (!test_bit(SDF_JOURNAL_LIVE, &sdp->sd_flags)) { | |
e317ffcb | 58 | tr->tr_t_gh.gh_flags |= GL_NOCACHE; |
b3b94faa DT |
59 | error = -EROFS; |
60 | goto fail_gunlock; | |
61 | } | |
62 | ||
63 | error = gfs2_log_reserve(sdp, tr->tr_reserved); | |
64 | if (error) | |
65 | goto fail_gunlock; | |
66 | ||
5c676f6d | 67 | current->journal_info = tr; |
b3b94faa DT |
68 | |
69 | return 0; | |
70 | ||
484adff8 | 71 | fail_gunlock: |
e317ffcb | 72 | gfs2_glock_dq(&tr->tr_t_gh); |
b3b94faa | 73 | |
484adff8 | 74 | fail_holder_uninit: |
e317ffcb | 75 | gfs2_holder_uninit(&tr->tr_t_gh); |
b3b94faa DT |
76 | kfree(tr); |
77 | ||
78 | return error; | |
79 | } | |
80 | ||
81 | void gfs2_trans_end(struct gfs2_sbd *sdp) | |
82 | { | |
f4154ea0 | 83 | struct gfs2_trans *tr = current->journal_info; |
b3b94faa | 84 | |
f4154ea0 | 85 | BUG_ON(!tr); |
5c676f6d | 86 | current->journal_info = NULL; |
b3b94faa | 87 | |
b3b94faa DT |
88 | if (!tr->tr_touched) { |
89 | gfs2_log_release(sdp, tr->tr_reserved); | |
b4dc7291 SW |
90 | gfs2_glock_dq(&tr->tr_t_gh); |
91 | gfs2_holder_uninit(&tr->tr_t_gh); | |
e317ffcb | 92 | kfree(tr); |
b3b94faa DT |
93 | return; |
94 | } | |
95 | ||
d0dc80db SW |
96 | if (gfs2_assert_withdraw(sdp, tr->tr_num_buf <= tr->tr_blocks)) { |
97 | fs_err(sdp, "tr_num_buf = %u, tr_blocks = %u ", | |
98 | tr->tr_num_buf, tr->tr_blocks); | |
99 | print_symbol(KERN_WARNING "GFS2: Transaction created at: %s\n", tr->tr_ip); | |
100 | } | |
cd45697f | 101 | if (gfs2_assert_withdraw(sdp, tr->tr_num_revoke <= tr->tr_revokes)) { |
d0dc80db SW |
102 | fs_err(sdp, "tr_num_revoke = %u, tr_revokes = %u ", |
103 | tr->tr_num_revoke, tr->tr_revokes); | |
104 | print_symbol(KERN_WARNING "GFS2: Transaction created at: %s\n", tr->tr_ip); | |
cd45697f | 105 | } |
b3b94faa DT |
106 | |
107 | gfs2_log_commit(sdp, tr); | |
b4dc7291 SW |
108 | gfs2_glock_dq(&tr->tr_t_gh); |
109 | gfs2_holder_uninit(&tr->tr_t_gh); | |
b4dc7291 | 110 | kfree(tr); |
b3b94faa DT |
111 | |
112 | if (sdp->sd_vfs->s_flags & MS_SYNCHRONOUS) | |
b09e593d | 113 | gfs2_log_flush(sdp, NULL); |
b3b94faa DT |
114 | } |
115 | ||
b3b94faa DT |
116 | /** |
117 | * gfs2_trans_add_bh - Add a to-be-modified buffer to the current transaction | |
118 | * @gl: the glock the buffer belongs to | |
119 | * @bh: The buffer to add | |
d4e9c4c3 | 120 | * @meta: True in the case of adding metadata |
b3b94faa DT |
121 | * |
122 | */ | |
123 | ||
d4e9c4c3 | 124 | void gfs2_trans_add_bh(struct gfs2_glock *gl, struct buffer_head *bh, int meta) |
b3b94faa DT |
125 | { |
126 | struct gfs2_sbd *sdp = gl->gl_sbd; | |
127 | struct gfs2_bufdata *bd; | |
128 | ||
5c676f6d | 129 | bd = bh->b_private; |
b3b94faa DT |
130 | if (bd) |
131 | gfs2_assert(sdp, bd->bd_gl == gl); | |
132 | else { | |
586dfdaa | 133 | gfs2_attach_bufdata(gl, bh, meta); |
5c676f6d | 134 | bd = bh->b_private; |
b3b94faa | 135 | } |
b3b94faa DT |
136 | lops_add(sdp, &bd->bd_le); |
137 | } | |
138 | ||
1ad38c43 | 139 | void gfs2_trans_add_revoke(struct gfs2_sbd *sdp, struct gfs2_bufdata *bd) |
b3b94faa | 140 | { |
1ad38c43 SW |
141 | BUG_ON(!list_empty(&bd->bd_le.le_list)); |
142 | BUG_ON(!list_empty(&bd->bd_ail_st_list)); | |
143 | BUG_ON(!list_empty(&bd->bd_ail_gl_list)); | |
82e86087 | 144 | lops_init_le(&bd->bd_le, &gfs2_revoke_lops); |
82e86087 | 145 | lops_add(sdp, &bd->bd_le); |
b3b94faa DT |
146 | } |
147 | ||
5731be53 | 148 | void gfs2_trans_add_unrevoke(struct gfs2_sbd *sdp, u64 blkno, unsigned int len) |
b3b94faa | 149 | { |
5731be53 SW |
150 | struct gfs2_bufdata *bd, *tmp; |
151 | struct gfs2_trans *tr = current->journal_info; | |
152 | unsigned int n = len; | |
b3b94faa DT |
153 | |
154 | gfs2_log_lock(sdp); | |
5731be53 SW |
155 | list_for_each_entry_safe(bd, tmp, &sdp->sd_log_le_revoke, bd_le.le_list) { |
156 | if ((bd->bd_blkno >= blkno) && (bd->bd_blkno < (blkno + len))) { | |
1ad38c43 | 157 | list_del_init(&bd->bd_le.le_list); |
b3b94faa DT |
158 | gfs2_assert_withdraw(sdp, sdp->sd_log_num_revoke); |
159 | sdp->sd_log_num_revoke--; | |
5731be53 SW |
160 | kmem_cache_free(gfs2_bufdata_cachep, bd); |
161 | tr->tr_num_revoke_rm++; | |
162 | if (--n == 0) | |
163 | break; | |
b3b94faa DT |
164 | } |
165 | } | |
b3b94faa | 166 | gfs2_log_unlock(sdp); |
b3b94faa DT |
167 | } |
168 | ||
169 | void gfs2_trans_add_rg(struct gfs2_rgrpd *rgd) | |
170 | { | |
171 | lops_add(rgd->rd_sbd, &rgd->rd_le); | |
172 | } | |
173 |