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7336d0e6 | 1 | // SPDX-License-Identifier: GPL-2.0-only |
b3b94faa DT |
2 | /* |
3 | * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved. | |
3a8a9a10 | 4 | * Copyright (C) 2004-2006 Red Hat, Inc. All rights reserved. |
b3b94faa DT |
5 | */ |
6 | ||
d77d1b58 JP |
7 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
8 | ||
b3b94faa DT |
9 | #include <linux/sched.h> |
10 | #include <linux/slab.h> | |
11 | #include <linux/spinlock.h> | |
12 | #include <linux/completion.h> | |
13 | #include <linux/buffer_head.h> | |
d0dc80db | 14 | #include <linux/kallsyms.h> |
f057f6cd | 15 | #include <linux/gfs2_ondisk.h> |
b3b94faa DT |
16 | |
17 | #include "gfs2.h" | |
5c676f6d | 18 | #include "incore.h" |
b3b94faa | 19 | #include "glock.h" |
767f433f | 20 | #include "inode.h" |
b3b94faa DT |
21 | #include "log.h" |
22 | #include "lops.h" | |
23 | #include "meta_io.h" | |
24 | #include "trans.h" | |
5c676f6d | 25 | #include "util.h" |
5e687eac | 26 | #include "trace_gfs2.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 | |
a1c0643f SW |
37 | if (!test_bit(SDF_JOURNAL_LIVE, &sdp->sd_flags)) |
38 | return -EROFS; | |
39 | ||
f55ab26a | 40 | tr = kzalloc(sizeof(struct gfs2_trans), GFP_NOFS); |
b3b94faa DT |
41 | if (!tr) |
42 | return -ENOMEM; | |
43 | ||
d29c0afe | 44 | tr->tr_ip = _RET_IP_; |
b3b94faa DT |
45 | tr->tr_blocks = blocks; |
46 | tr->tr_revokes = revokes; | |
47 | tr->tr_reserved = 1; | |
9862ca05 | 48 | set_bit(TR_ALLOCED, &tr->tr_flags); |
b3b94faa | 49 | if (blocks) |
f4154ea0 | 50 | tr->tr_reserved += 6 + blocks; |
b3b94faa | 51 | if (revokes) |
2e9eeaa1 | 52 | tr->tr_reserved += gfs2_struct2blk(sdp, revokes); |
d69a3c65 SW |
53 | INIT_LIST_HEAD(&tr->tr_databuf); |
54 | INIT_LIST_HEAD(&tr->tr_buf); | |
55 | ||
39263d5e | 56 | sb_start_intwrite(sdp->sd_vfs); |
b3b94faa | 57 | |
b3b94faa DT |
58 | error = gfs2_log_reserve(sdp, tr->tr_reserved); |
59 | if (error) | |
24972557 | 60 | goto fail; |
b3b94faa | 61 | |
5c676f6d | 62 | current->journal_info = tr; |
b3b94faa DT |
63 | |
64 | return 0; | |
65 | ||
24972557 | 66 | fail: |
39263d5e | 67 | sb_end_intwrite(sdp->sd_vfs); |
b3b94faa DT |
68 | kfree(tr); |
69 | ||
70 | return error; | |
71 | } | |
72 | ||
e54c78a2 | 73 | static void gfs2_print_trans(struct gfs2_sbd *sdp, const struct gfs2_trans *tr) |
c50b91c4 | 74 | { |
e54c78a2 BP |
75 | fs_warn(sdp, "Transaction created at: %pSR\n", (void *)tr->tr_ip); |
76 | fs_warn(sdp, "blocks=%u revokes=%u reserved=%u touched=%u\n", | |
9862ca05 BP |
77 | tr->tr_blocks, tr->tr_revokes, tr->tr_reserved, |
78 | test_bit(TR_TOUCHED, &tr->tr_flags)); | |
a31b4ec5 | 79 | fs_warn(sdp, "Buf %u/%u Databuf %u/%u Revoke %u/%u\n", |
d77d1b58 JP |
80 | tr->tr_num_buf_new, tr->tr_num_buf_rm, |
81 | tr->tr_num_databuf_new, tr->tr_num_databuf_rm, | |
a31b4ec5 | 82 | tr->tr_num_revoke, tr->tr_num_revoke_rm); |
c50b91c4 SW |
83 | } |
84 | ||
b3b94faa DT |
85 | void gfs2_trans_end(struct gfs2_sbd *sdp) |
86 | { | |
f4154ea0 | 87 | struct gfs2_trans *tr = current->journal_info; |
c50b91c4 | 88 | s64 nbuf; |
9862ca05 | 89 | int alloced = test_bit(TR_ALLOCED, &tr->tr_flags); |
2e60d768 | 90 | |
5c676f6d | 91 | current->journal_info = NULL; |
b3b94faa | 92 | |
9862ca05 | 93 | if (!test_bit(TR_TOUCHED, &tr->tr_flags)) { |
b3b94faa | 94 | gfs2_log_release(sdp, tr->tr_reserved); |
2e60d768 | 95 | if (alloced) { |
d8348de0 | 96 | kfree(tr); |
2e60d768 BM |
97 | sb_end_intwrite(sdp->sd_vfs); |
98 | } | |
b3b94faa DT |
99 | return; |
100 | } | |
101 | ||
c50b91c4 SW |
102 | nbuf = tr->tr_num_buf_new + tr->tr_num_databuf_new; |
103 | nbuf -= tr->tr_num_buf_rm; | |
104 | nbuf -= tr->tr_num_databuf_rm; | |
105 | ||
106 | if (gfs2_assert_withdraw(sdp, (nbuf <= tr->tr_blocks) && | |
107 | (tr->tr_num_revoke <= tr->tr_revokes))) | |
e54c78a2 | 108 | gfs2_print_trans(sdp, tr); |
b3b94faa DT |
109 | |
110 | gfs2_log_commit(sdp, tr); | |
9862ca05 BP |
111 | if (alloced && !test_bit(TR_ATTACHED, &tr->tr_flags)) |
112 | kfree(tr); | |
16ca9412 | 113 | up_read(&sdp->sd_log_flush_lock); |
b3b94faa | 114 | |
1751e8a6 | 115 | if (sdp->sd_vfs->s_flags & SB_SYNCHRONOUS) |
805c0907 BP |
116 | gfs2_log_flush(sdp, NULL, GFS2_LOG_HEAD_FLUSH_NORMAL | |
117 | GFS2_LFC_TRANS_END); | |
2e60d768 BM |
118 | if (alloced) |
119 | sb_end_intwrite(sdp->sd_vfs); | |
b3b94faa DT |
120 | } |
121 | ||
c76c4d96 | 122 | static struct gfs2_bufdata *gfs2_alloc_bufdata(struct gfs2_glock *gl, |
cbbe76c8 | 123 | struct buffer_head *bh) |
c76c4d96 SW |
124 | { |
125 | struct gfs2_bufdata *bd; | |
126 | ||
127 | bd = kmem_cache_zalloc(gfs2_bufdata_cachep, GFP_NOFS | __GFP_NOFAIL); | |
128 | bd->bd_bh = bh; | |
129 | bd->bd_gl = gl; | |
c76c4d96 SW |
130 | INIT_LIST_HEAD(&bd->bd_list); |
131 | bh->b_private = bd; | |
132 | return bd; | |
133 | } | |
134 | ||
b3b94faa | 135 | /** |
45138990 SW |
136 | * gfs2_trans_add_data - Add a databuf to the transaction. |
137 | * @gl: The inode glock associated with the buffer | |
138 | * @bh: The buffer to add | |
b3b94faa | 139 | * |
845802b1 AG |
140 | * This is used in journaled data mode. |
141 | * We need to journal the data block in the same way as metadata in | |
142 | * the functions above. The difference is that here we have a tag | |
143 | * which is two __be64's being the block number (as per meta data) | |
144 | * and a flag which says whether the data block needs escaping or | |
145 | * not. This means we need a new log entry for each 251 or so data | |
146 | * blocks, which isn't an enormous overhead but twice as much as | |
147 | * for normal metadata blocks. | |
b3b94faa | 148 | */ |
45138990 | 149 | void gfs2_trans_add_data(struct gfs2_glock *gl, struct buffer_head *bh) |
767f433f SW |
150 | { |
151 | struct gfs2_trans *tr = current->journal_info; | |
15562c43 | 152 | struct gfs2_sbd *sdp = gl->gl_name.ln_sbd; |
45138990 | 153 | struct gfs2_bufdata *bd; |
767f433f | 154 | |
96e5d1d3 | 155 | lock_buffer(bh); |
aacee720 BP |
156 | if (buffer_pinned(bh)) { |
157 | set_bit(TR_TOUCHED, &tr->tr_flags); | |
158 | goto out; | |
159 | } | |
96e5d1d3 | 160 | gfs2_log_lock(sdp); |
5c676f6d | 161 | bd = bh->b_private; |
c76c4d96 | 162 | if (bd == NULL) { |
96e5d1d3 BM |
163 | gfs2_log_unlock(sdp); |
164 | unlock_buffer(bh); | |
c76c4d96 | 165 | if (bh->b_private == NULL) |
cbbe76c8 | 166 | bd = gfs2_alloc_bufdata(gl, bh); |
491e94f7 BP |
167 | else |
168 | bd = bh->b_private; | |
96e5d1d3 BM |
169 | lock_buffer(bh); |
170 | gfs2_log_lock(sdp); | |
b3b94faa | 171 | } |
c76c4d96 | 172 | gfs2_assert(sdp, bd->bd_gl == gl); |
9862ca05 | 173 | set_bit(TR_TOUCHED, &tr->tr_flags); |
45138990 SW |
174 | if (list_empty(&bd->bd_list)) { |
175 | set_bit(GLF_LFLUSH, &bd->bd_gl->gl_flags); | |
176 | set_bit(GLF_DIRTY, &bd->bd_gl->gl_flags); | |
177 | gfs2_pin(sdp, bd->bd_bh); | |
178 | tr->tr_num_databuf_new++; | |
d69a3c65 | 179 | list_add_tail(&bd->bd_list, &tr->tr_databuf); |
45138990 | 180 | } |
96e5d1d3 | 181 | gfs2_log_unlock(sdp); |
aacee720 | 182 | out: |
96e5d1d3 | 183 | unlock_buffer(bh); |
b3b94faa DT |
184 | } |
185 | ||
192738b7 | 186 | void gfs2_trans_add_meta(struct gfs2_glock *gl, struct buffer_head *bh) |
350a9b0a | 187 | { |
192738b7 BP |
188 | |
189 | struct gfs2_sbd *sdp = gl->gl_name.ln_sbd; | |
190 | struct gfs2_bufdata *bd; | |
767f433f | 191 | struct gfs2_meta_header *mh; |
aacee720 | 192 | struct gfs2_trans *tr = current->journal_info; |
2e60d768 | 193 | enum gfs2_freeze_state state = atomic_read(&sdp->sd_freeze_state); |
767f433f | 194 | |
192738b7 | 195 | lock_buffer(bh); |
aacee720 BP |
196 | if (buffer_pinned(bh)) { |
197 | set_bit(TR_TOUCHED, &tr->tr_flags); | |
198 | goto out; | |
199 | } | |
192738b7 BP |
200 | gfs2_log_lock(sdp); |
201 | bd = bh->b_private; | |
202 | if (bd == NULL) { | |
203 | gfs2_log_unlock(sdp); | |
204 | unlock_buffer(bh); | |
205 | lock_page(bh->b_page); | |
206 | if (bh->b_private == NULL) | |
cbbe76c8 | 207 | bd = gfs2_alloc_bufdata(gl, bh); |
192738b7 BP |
208 | else |
209 | bd = bh->b_private; | |
210 | unlock_page(bh->b_page); | |
211 | lock_buffer(bh); | |
212 | gfs2_log_lock(sdp); | |
213 | } | |
214 | gfs2_assert(sdp, bd->bd_gl == gl); | |
9862ca05 | 215 | set_bit(TR_TOUCHED, &tr->tr_flags); |
767f433f | 216 | if (!list_empty(&bd->bd_list)) |
192738b7 | 217 | goto out_unlock; |
767f433f SW |
218 | set_bit(GLF_LFLUSH, &bd->bd_gl->gl_flags); |
219 | set_bit(GLF_DIRTY, &bd->bd_gl->gl_flags); | |
220 | mh = (struct gfs2_meta_header *)bd->bd_bh->b_data; | |
221 | if (unlikely(mh->mh_magic != cpu_to_be32(GFS2_MAGIC))) { | |
e54c78a2 BP |
222 | fs_err(sdp, "Attempting to add uninitialised block to " |
223 | "journal (inplace block=%lld)\n", | |
767f433f SW |
224 | (unsigned long long)bd->bd_bh->b_blocknr); |
225 | BUG(); | |
226 | } | |
2e60d768 | 227 | if (unlikely(state == SFS_FROZEN)) { |
e54c78a2 | 228 | fs_info(sdp, "GFS2:adding buf while frozen\n"); |
2e60d768 BM |
229 | gfs2_assert_withdraw(sdp, 0); |
230 | } | |
2ca0c2fb BP |
231 | if (unlikely(gfs2_withdrawn(sdp))) { |
232 | fs_info(sdp, "GFS2:adding buf while withdrawn! 0x%llx\n", | |
233 | (unsigned long long)bd->bd_bh->b_blocknr); | |
234 | } | |
767f433f SW |
235 | gfs2_pin(sdp, bd->bd_bh); |
236 | mh->__pad0 = cpu_to_be64(0); | |
237 | mh->mh_jid = cpu_to_be32(sdp->sd_jdesc->jd_jid); | |
d69a3c65 | 238 | list_add(&bd->bd_list, &tr->tr_buf); |
767f433f | 239 | tr->tr_num_buf_new++; |
192738b7 | 240 | out_unlock: |
767f433f | 241 | gfs2_log_unlock(sdp); |
aacee720 | 242 | out: |
767f433f | 243 | unlock_buffer(bh); |
350a9b0a SW |
244 | } |
245 | ||
1ad38c43 | 246 | void gfs2_trans_add_revoke(struct gfs2_sbd *sdp, struct gfs2_bufdata *bd) |
b3b94faa | 247 | { |
75f2b879 SW |
248 | struct gfs2_trans *tr = current->journal_info; |
249 | ||
c0752aa7 | 250 | BUG_ON(!list_empty(&bd->bd_list)); |
5d054964 | 251 | gfs2_add_revoke(sdp, bd); |
9862ca05 | 252 | set_bit(TR_TOUCHED, &tr->tr_flags); |
75f2b879 | 253 | tr->tr_num_revoke++; |
b3b94faa DT |
254 | } |
255 | ||
fbb27873 | 256 | void gfs2_trans_remove_revoke(struct gfs2_sbd *sdp, u64 blkno, unsigned int len) |
b3b94faa | 257 | { |
5731be53 SW |
258 | struct gfs2_bufdata *bd, *tmp; |
259 | struct gfs2_trans *tr = current->journal_info; | |
260 | unsigned int n = len; | |
b3b94faa DT |
261 | |
262 | gfs2_log_lock(sdp); | |
a5b1d3fc | 263 | list_for_each_entry_safe(bd, tmp, &sdp->sd_log_revokes, bd_list) { |
5731be53 | 264 | if ((bd->bd_blkno >= blkno) && (bd->bd_blkno < (blkno + len))) { |
c0752aa7 | 265 | list_del_init(&bd->bd_list); |
b3b94faa DT |
266 | gfs2_assert_withdraw(sdp, sdp->sd_log_num_revoke); |
267 | sdp->sd_log_num_revoke--; | |
fe5e7ba1 BP |
268 | if (bd->bd_gl) |
269 | gfs2_glock_remove_revoke(bd->bd_gl); | |
5731be53 | 270 | kmem_cache_free(gfs2_bufdata_cachep, bd); |
a31b4ec5 | 271 | tr->tr_num_revoke_rm++; |
5731be53 SW |
272 | if (--n == 0) |
273 | break; | |
b3b94faa DT |
274 | } |
275 | } | |
b3b94faa | 276 | gfs2_log_unlock(sdp); |
b3b94faa DT |
277 | } |
278 |