Commit | Line | Data |
---|---|---|
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> | |
5c676f6d | 15 | #include <linux/gfs2_ondisk.h> |
7d308590 | 16 | #include <linux/lm_interface.h> |
b3b94faa DT |
17 | |
18 | #include "gfs2.h" | |
5c676f6d | 19 | #include "incore.h" |
2332c443 | 20 | #include "inode.h" |
b3b94faa DT |
21 | #include "glock.h" |
22 | #include "log.h" | |
23 | #include "lops.h" | |
24 | #include "meta_io.h" | |
25 | #include "recovery.h" | |
26 | #include "rgrp.h" | |
27 | #include "trans.h" | |
5c676f6d | 28 | #include "util.h" |
b3b94faa DT |
29 | |
30 | static void glock_lo_add(struct gfs2_sbd *sdp, struct gfs2_log_element *le) | |
31 | { | |
32 | struct gfs2_glock *gl; | |
5c676f6d | 33 | struct gfs2_trans *tr = current->journal_info; |
b3b94faa | 34 | |
5c676f6d | 35 | tr->tr_touched = 1; |
b3b94faa | 36 | |
b3b94faa DT |
37 | gl = container_of(le, struct gfs2_glock, gl_le); |
38 | if (gfs2_assert_withdraw(sdp, gfs2_glock_is_held_excl(gl))) | |
39 | return; | |
b3b94faa DT |
40 | |
41 | gfs2_log_lock(sdp); | |
68835625 BM |
42 | if (!list_empty(&le->le_list)){ |
43 | gfs2_log_unlock(sdp); | |
44 | return; | |
45 | } | |
46 | gfs2_glock_hold(gl); | |
47 | set_bit(GLF_DIRTY, &gl->gl_flags); | |
b3b94faa DT |
48 | sdp->sd_log_num_gl++; |
49 | list_add(&le->le_list, &sdp->sd_log_le_gl); | |
50 | gfs2_log_unlock(sdp); | |
51 | } | |
52 | ||
53 | static void glock_lo_after_commit(struct gfs2_sbd *sdp, struct gfs2_ail *ai) | |
54 | { | |
55 | struct list_head *head = &sdp->sd_log_le_gl; | |
56 | struct gfs2_glock *gl; | |
57 | ||
58 | while (!list_empty(head)) { | |
59 | gl = list_entry(head->next, struct gfs2_glock, gl_le.le_list); | |
60 | list_del_init(&gl->gl_le.le_list); | |
61 | sdp->sd_log_num_gl--; | |
62 | ||
63 | gfs2_assert_withdraw(sdp, gfs2_glock_is_held_excl(gl)); | |
64 | gfs2_glock_put(gl); | |
65 | } | |
66 | gfs2_assert_warn(sdp, !sdp->sd_log_num_gl); | |
67 | } | |
68 | ||
69 | static void buf_lo_add(struct gfs2_sbd *sdp, struct gfs2_log_element *le) | |
70 | { | |
71 | struct gfs2_bufdata *bd = container_of(le, struct gfs2_bufdata, bd_le); | |
72 | struct gfs2_trans *tr; | |
73 | ||
8bd95727 SW |
74 | gfs2_log_lock(sdp); |
75 | if (!list_empty(&bd->bd_list_tr)) { | |
76 | gfs2_log_unlock(sdp); | |
b3b94faa | 77 | return; |
8bd95727 | 78 | } |
5c676f6d | 79 | tr = current->journal_info; |
b3b94faa DT |
80 | tr->tr_touched = 1; |
81 | tr->tr_num_buf++; | |
82 | list_add(&bd->bd_list_tr, &tr->tr_list_buf); | |
8bd95727 | 83 | gfs2_log_unlock(sdp); |
b3b94faa DT |
84 | |
85 | if (!list_empty(&le->le_list)) | |
86 | return; | |
87 | ||
88 | gfs2_trans_add_gl(bd->bd_gl); | |
89 | ||
90 | gfs2_meta_check(sdp, bd->bd_bh); | |
a98ab220 | 91 | gfs2_pin(sdp, bd->bd_bh); |
b3b94faa DT |
92 | gfs2_log_lock(sdp); |
93 | sdp->sd_log_num_buf++; | |
94 | list_add(&le->le_list, &sdp->sd_log_le_buf); | |
95 | gfs2_log_unlock(sdp); | |
96 | ||
97 | tr->tr_num_buf_new++; | |
98 | } | |
99 | ||
100 | static void buf_lo_incore_commit(struct gfs2_sbd *sdp, struct gfs2_trans *tr) | |
101 | { | |
102 | struct list_head *head = &tr->tr_list_buf; | |
103 | struct gfs2_bufdata *bd; | |
104 | ||
8bd95727 | 105 | gfs2_log_lock(sdp); |
b3b94faa DT |
106 | while (!list_empty(head)) { |
107 | bd = list_entry(head->next, struct gfs2_bufdata, bd_list_tr); | |
108 | list_del_init(&bd->bd_list_tr); | |
109 | tr->tr_num_buf--; | |
110 | } | |
8bd95727 | 111 | gfs2_log_unlock(sdp); |
b3b94faa DT |
112 | gfs2_assert_warn(sdp, !tr->tr_num_buf); |
113 | } | |
114 | ||
115 | static void buf_lo_before_commit(struct gfs2_sbd *sdp) | |
116 | { | |
117 | struct buffer_head *bh; | |
118 | struct gfs2_log_descriptor *ld; | |
119 | struct gfs2_bufdata *bd1 = NULL, *bd2; | |
120 | unsigned int total = sdp->sd_log_num_buf; | |
2332c443 | 121 | unsigned int offset = BUF_OFFSET; |
b3b94faa DT |
122 | unsigned int limit; |
123 | unsigned int num; | |
124 | unsigned n; | |
125 | __be64 *ptr; | |
126 | ||
2332c443 | 127 | limit = buf_limit(sdp); |
b3b94faa DT |
128 | /* for 4k blocks, limit = 503 */ |
129 | ||
130 | bd1 = bd2 = list_prepare_entry(bd1, &sdp->sd_log_le_buf, bd_le.le_list); | |
131 | while(total) { | |
132 | num = total; | |
133 | if (total > limit) | |
134 | num = limit; | |
135 | bh = gfs2_log_get_buf(sdp); | |
136 | ld = (struct gfs2_log_descriptor *)bh->b_data; | |
137 | ptr = (__be64 *)(bh->b_data + offset); | |
138 | ld->ld_header.mh_magic = cpu_to_be32(GFS2_MAGIC); | |
e3167ded SW |
139 | ld->ld_header.mh_type = cpu_to_be32(GFS2_METATYPE_LD); |
140 | ld->ld_header.mh_format = cpu_to_be32(GFS2_FORMAT_LD); | |
b3b94faa DT |
141 | ld->ld_type = cpu_to_be32(GFS2_LOG_DESC_METADATA); |
142 | ld->ld_length = cpu_to_be32(num + 1); | |
143 | ld->ld_data1 = cpu_to_be32(num); | |
144 | ld->ld_data2 = cpu_to_be32(0); | |
145 | memset(ld->ld_reserved, 0, sizeof(ld->ld_reserved)); | |
146 | ||
147 | n = 0; | |
568f4c96 SW |
148 | list_for_each_entry_continue(bd1, &sdp->sd_log_le_buf, |
149 | bd_le.le_list) { | |
b3b94faa DT |
150 | *ptr++ = cpu_to_be64(bd1->bd_bh->b_blocknr); |
151 | if (++n >= num) | |
152 | break; | |
153 | } | |
154 | ||
155 | set_buffer_dirty(bh); | |
156 | ll_rw_block(WRITE, 1, &bh); | |
157 | ||
158 | n = 0; | |
568f4c96 SW |
159 | list_for_each_entry_continue(bd2, &sdp->sd_log_le_buf, |
160 | bd_le.le_list) { | |
b3b94faa DT |
161 | bh = gfs2_log_fake_buf(sdp, bd2->bd_bh); |
162 | set_buffer_dirty(bh); | |
163 | ll_rw_block(WRITE, 1, &bh); | |
164 | if (++n >= num) | |
165 | break; | |
166 | } | |
167 | ||
168 | total -= num; | |
169 | } | |
170 | } | |
171 | ||
172 | static void buf_lo_after_commit(struct gfs2_sbd *sdp, struct gfs2_ail *ai) | |
173 | { | |
174 | struct list_head *head = &sdp->sd_log_le_buf; | |
175 | struct gfs2_bufdata *bd; | |
176 | ||
177 | while (!list_empty(head)) { | |
178 | bd = list_entry(head->next, struct gfs2_bufdata, bd_le.le_list); | |
179 | list_del_init(&bd->bd_le.le_list); | |
180 | sdp->sd_log_num_buf--; | |
181 | ||
a98ab220 | 182 | gfs2_unpin(sdp, bd->bd_bh, ai); |
b3b94faa DT |
183 | } |
184 | gfs2_assert_warn(sdp, !sdp->sd_log_num_buf); | |
185 | } | |
186 | ||
187 | static void buf_lo_before_scan(struct gfs2_jdesc *jd, | |
55167622 | 188 | struct gfs2_log_header_host *head, int pass) |
b3b94faa | 189 | { |
feaa7bba | 190 | struct gfs2_sbd *sdp = GFS2_SB(jd->jd_inode); |
b3b94faa DT |
191 | |
192 | if (pass != 0) | |
193 | return; | |
194 | ||
195 | sdp->sd_found_blocks = 0; | |
196 | sdp->sd_replayed_blocks = 0; | |
197 | } | |
198 | ||
199 | static int buf_lo_scan_elements(struct gfs2_jdesc *jd, unsigned int start, | |
200 | struct gfs2_log_descriptor *ld, __be64 *ptr, | |
201 | int pass) | |
202 | { | |
feaa7bba SW |
203 | struct gfs2_inode *ip = GFS2_I(jd->jd_inode); |
204 | struct gfs2_sbd *sdp = GFS2_SB(jd->jd_inode); | |
5c676f6d | 205 | struct gfs2_glock *gl = ip->i_gl; |
b3b94faa DT |
206 | unsigned int blks = be32_to_cpu(ld->ld_data1); |
207 | struct buffer_head *bh_log, *bh_ip; | |
cd915493 | 208 | u64 blkno; |
b3b94faa DT |
209 | int error = 0; |
210 | ||
211 | if (pass != 1 || be32_to_cpu(ld->ld_type) != GFS2_LOG_DESC_METADATA) | |
212 | return 0; | |
213 | ||
214 | gfs2_replay_incr_blk(sdp, &start); | |
215 | ||
216 | for (; blks; gfs2_replay_incr_blk(sdp, &start), blks--) { | |
217 | blkno = be64_to_cpu(*ptr++); | |
218 | ||
219 | sdp->sd_found_blocks++; | |
220 | ||
221 | if (gfs2_revoke_check(sdp, blkno, start)) | |
222 | continue; | |
223 | ||
224 | error = gfs2_replay_read_block(jd, start, &bh_log); | |
82ffa516 SW |
225 | if (error) |
226 | return error; | |
b3b94faa DT |
227 | |
228 | bh_ip = gfs2_meta_new(gl, blkno); | |
229 | memcpy(bh_ip->b_data, bh_log->b_data, bh_log->b_size); | |
230 | ||
231 | if (gfs2_meta_check(sdp, bh_ip)) | |
232 | error = -EIO; | |
233 | else | |
234 | mark_buffer_dirty(bh_ip); | |
235 | ||
236 | brelse(bh_log); | |
237 | brelse(bh_ip); | |
238 | ||
239 | if (error) | |
240 | break; | |
241 | ||
242 | sdp->sd_replayed_blocks++; | |
243 | } | |
244 | ||
245 | return error; | |
246 | } | |
247 | ||
248 | static void buf_lo_after_scan(struct gfs2_jdesc *jd, int error, int pass) | |
249 | { | |
feaa7bba SW |
250 | struct gfs2_inode *ip = GFS2_I(jd->jd_inode); |
251 | struct gfs2_sbd *sdp = GFS2_SB(jd->jd_inode); | |
b3b94faa DT |
252 | |
253 | if (error) { | |
7276b3b0 | 254 | gfs2_meta_sync(ip->i_gl); |
b3b94faa DT |
255 | return; |
256 | } | |
257 | if (pass != 1) | |
258 | return; | |
259 | ||
7276b3b0 | 260 | gfs2_meta_sync(ip->i_gl); |
b3b94faa DT |
261 | |
262 | fs_info(sdp, "jid=%u: Replayed %u of %u blocks\n", | |
263 | jd->jd_jid, sdp->sd_replayed_blocks, sdp->sd_found_blocks); | |
264 | } | |
265 | ||
266 | static void revoke_lo_add(struct gfs2_sbd *sdp, struct gfs2_log_element *le) | |
267 | { | |
268 | struct gfs2_trans *tr; | |
269 | ||
5c676f6d | 270 | tr = current->journal_info; |
b3b94faa DT |
271 | tr->tr_touched = 1; |
272 | tr->tr_num_revoke++; | |
273 | ||
274 | gfs2_log_lock(sdp); | |
275 | sdp->sd_log_num_revoke++; | |
276 | list_add(&le->le_list, &sdp->sd_log_le_revoke); | |
277 | gfs2_log_unlock(sdp); | |
278 | } | |
279 | ||
280 | static void revoke_lo_before_commit(struct gfs2_sbd *sdp) | |
281 | { | |
282 | struct gfs2_log_descriptor *ld; | |
283 | struct gfs2_meta_header *mh; | |
284 | struct buffer_head *bh; | |
285 | unsigned int offset; | |
286 | struct list_head *head = &sdp->sd_log_le_revoke; | |
287 | struct gfs2_revoke *rv; | |
288 | ||
289 | if (!sdp->sd_log_num_revoke) | |
290 | return; | |
291 | ||
292 | bh = gfs2_log_get_buf(sdp); | |
293 | ld = (struct gfs2_log_descriptor *)bh->b_data; | |
294 | ld->ld_header.mh_magic = cpu_to_be32(GFS2_MAGIC); | |
e3167ded SW |
295 | ld->ld_header.mh_type = cpu_to_be32(GFS2_METATYPE_LD); |
296 | ld->ld_header.mh_format = cpu_to_be32(GFS2_FORMAT_LD); | |
b3b94faa | 297 | ld->ld_type = cpu_to_be32(GFS2_LOG_DESC_REVOKE); |
568f4c96 | 298 | ld->ld_length = cpu_to_be32(gfs2_struct2blk(sdp, sdp->sd_log_num_revoke, |
cd915493 | 299 | sizeof(u64))); |
b3b94faa DT |
300 | ld->ld_data1 = cpu_to_be32(sdp->sd_log_num_revoke); |
301 | ld->ld_data2 = cpu_to_be32(0); | |
302 | memset(ld->ld_reserved, 0, sizeof(ld->ld_reserved)); | |
303 | offset = sizeof(struct gfs2_log_descriptor); | |
304 | ||
305 | while (!list_empty(head)) { | |
306 | rv = list_entry(head->next, struct gfs2_revoke, rv_le.le_list); | |
13538b8e | 307 | list_del_init(&rv->rv_le.le_list); |
b3b94faa DT |
308 | sdp->sd_log_num_revoke--; |
309 | ||
cd915493 | 310 | if (offset + sizeof(u64) > sdp->sd_sb.sb_bsize) { |
b3b94faa DT |
311 | set_buffer_dirty(bh); |
312 | ll_rw_block(WRITE, 1, &bh); | |
313 | ||
314 | bh = gfs2_log_get_buf(sdp); | |
315 | mh = (struct gfs2_meta_header *)bh->b_data; | |
316 | mh->mh_magic = cpu_to_be32(GFS2_MAGIC); | |
e3167ded SW |
317 | mh->mh_type = cpu_to_be32(GFS2_METATYPE_LB); |
318 | mh->mh_format = cpu_to_be32(GFS2_FORMAT_LB); | |
b3b94faa DT |
319 | offset = sizeof(struct gfs2_meta_header); |
320 | } | |
321 | ||
322 | *(__be64 *)(bh->b_data + offset) = cpu_to_be64(rv->rv_blkno); | |
323 | kfree(rv); | |
324 | ||
cd915493 | 325 | offset += sizeof(u64); |
b3b94faa DT |
326 | } |
327 | gfs2_assert_withdraw(sdp, !sdp->sd_log_num_revoke); | |
328 | ||
329 | set_buffer_dirty(bh); | |
330 | ll_rw_block(WRITE, 1, &bh); | |
331 | } | |
332 | ||
333 | static void revoke_lo_before_scan(struct gfs2_jdesc *jd, | |
55167622 | 334 | struct gfs2_log_header_host *head, int pass) |
b3b94faa | 335 | { |
feaa7bba | 336 | struct gfs2_sbd *sdp = GFS2_SB(jd->jd_inode); |
b3b94faa DT |
337 | |
338 | if (pass != 0) | |
339 | return; | |
340 | ||
341 | sdp->sd_found_revokes = 0; | |
342 | sdp->sd_replay_tail = head->lh_tail; | |
343 | } | |
344 | ||
345 | static int revoke_lo_scan_elements(struct gfs2_jdesc *jd, unsigned int start, | |
346 | struct gfs2_log_descriptor *ld, __be64 *ptr, | |
347 | int pass) | |
348 | { | |
feaa7bba | 349 | struct gfs2_sbd *sdp = GFS2_SB(jd->jd_inode); |
b3b94faa DT |
350 | unsigned int blks = be32_to_cpu(ld->ld_length); |
351 | unsigned int revokes = be32_to_cpu(ld->ld_data1); | |
352 | struct buffer_head *bh; | |
353 | unsigned int offset; | |
cd915493 | 354 | u64 blkno; |
b3b94faa DT |
355 | int first = 1; |
356 | int error; | |
357 | ||
358 | if (pass != 0 || be32_to_cpu(ld->ld_type) != GFS2_LOG_DESC_REVOKE) | |
359 | return 0; | |
360 | ||
361 | offset = sizeof(struct gfs2_log_descriptor); | |
362 | ||
363 | for (; blks; gfs2_replay_incr_blk(sdp, &start), blks--) { | |
364 | error = gfs2_replay_read_block(jd, start, &bh); | |
365 | if (error) | |
366 | return error; | |
367 | ||
368 | if (!first) | |
369 | gfs2_metatype_check(sdp, bh, GFS2_METATYPE_LB); | |
370 | ||
cd915493 | 371 | while (offset + sizeof(u64) <= sdp->sd_sb.sb_bsize) { |
b3b94faa DT |
372 | blkno = be64_to_cpu(*(__be64 *)(bh->b_data + offset)); |
373 | ||
374 | error = gfs2_revoke_add(sdp, blkno, start); | |
375 | if (error < 0) | |
376 | return error; | |
377 | else if (error) | |
378 | sdp->sd_found_revokes++; | |
379 | ||
380 | if (!--revokes) | |
381 | break; | |
cd915493 | 382 | offset += sizeof(u64); |
b3b94faa DT |
383 | } |
384 | ||
385 | brelse(bh); | |
386 | offset = sizeof(struct gfs2_meta_header); | |
387 | first = 0; | |
388 | } | |
389 | ||
390 | return 0; | |
391 | } | |
392 | ||
393 | static void revoke_lo_after_scan(struct gfs2_jdesc *jd, int error, int pass) | |
394 | { | |
feaa7bba | 395 | struct gfs2_sbd *sdp = GFS2_SB(jd->jd_inode); |
b3b94faa DT |
396 | |
397 | if (error) { | |
398 | gfs2_revoke_clean(sdp); | |
399 | return; | |
400 | } | |
401 | if (pass != 1) | |
402 | return; | |
403 | ||
404 | fs_info(sdp, "jid=%u: Found %u revoke tags\n", | |
405 | jd->jd_jid, sdp->sd_found_revokes); | |
406 | ||
407 | gfs2_revoke_clean(sdp); | |
408 | } | |
409 | ||
410 | static void rg_lo_add(struct gfs2_sbd *sdp, struct gfs2_log_element *le) | |
411 | { | |
412 | struct gfs2_rgrpd *rgd; | |
5c676f6d | 413 | struct gfs2_trans *tr = current->journal_info; |
b3b94faa | 414 | |
5c676f6d | 415 | tr->tr_touched = 1; |
b3b94faa | 416 | |
b3b94faa | 417 | rgd = container_of(le, struct gfs2_rgrpd, rd_le); |
b3b94faa DT |
418 | |
419 | gfs2_log_lock(sdp); | |
68835625 BM |
420 | if (!list_empty(&le->le_list)){ |
421 | gfs2_log_unlock(sdp); | |
422 | return; | |
423 | } | |
424 | gfs2_rgrp_bh_hold(rgd); | |
b3b94faa DT |
425 | sdp->sd_log_num_rg++; |
426 | list_add(&le->le_list, &sdp->sd_log_le_rg); | |
907b9bce | 427 | gfs2_log_unlock(sdp); |
b3b94faa DT |
428 | } |
429 | ||
430 | static void rg_lo_after_commit(struct gfs2_sbd *sdp, struct gfs2_ail *ai) | |
431 | { | |
432 | struct list_head *head = &sdp->sd_log_le_rg; | |
433 | struct gfs2_rgrpd *rgd; | |
434 | ||
435 | while (!list_empty(head)) { | |
436 | rgd = list_entry(head->next, struct gfs2_rgrpd, rd_le.le_list); | |
437 | list_del_init(&rgd->rd_le.le_list); | |
438 | sdp->sd_log_num_rg--; | |
439 | ||
440 | gfs2_rgrp_repolish_clones(rgd); | |
441 | gfs2_rgrp_bh_put(rgd); | |
442 | } | |
443 | gfs2_assert_warn(sdp, !sdp->sd_log_num_rg); | |
444 | } | |
445 | ||
18ec7d5c SW |
446 | /** |
447 | * databuf_lo_add - Add a databuf to the transaction. | |
448 | * | |
449 | * This is used in two distinct cases: | |
450 | * i) In ordered write mode | |
451 | * We put the data buffer on a list so that we can ensure that its | |
452 | * synced to disk at the right time | |
453 | * ii) In journaled data mode | |
454 | * We need to journal the data block in the same way as metadata in | |
455 | * the functions above. The difference is that here we have a tag | |
456 | * which is two __be64's being the block number (as per meta data) | |
457 | * and a flag which says whether the data block needs escaping or | |
458 | * not. This means we need a new log entry for each 251 or so data | |
459 | * blocks, which isn't an enormous overhead but twice as much as | |
460 | * for normal metadata blocks. | |
461 | */ | |
b3b94faa DT |
462 | static void databuf_lo_add(struct gfs2_sbd *sdp, struct gfs2_log_element *le) |
463 | { | |
18ec7d5c | 464 | struct gfs2_bufdata *bd = container_of(le, struct gfs2_bufdata, bd_le); |
5c676f6d | 465 | struct gfs2_trans *tr = current->journal_info; |
18ec7d5c | 466 | struct address_space *mapping = bd->bd_bh->b_page->mapping; |
feaa7bba | 467 | struct gfs2_inode *ip = GFS2_I(mapping->host); |
b3b94faa | 468 | |
8bd95727 | 469 | gfs2_log_lock(sdp); |
2332c443 | 470 | if (!list_empty(&bd->bd_list_tr)) { |
8bd95727 | 471 | gfs2_log_unlock(sdp); |
2332c443 | 472 | return; |
18ec7d5c | 473 | } |
2332c443 | 474 | tr->tr_touched = 1; |
773ed1a0 RP |
475 | if (gfs2_is_jdata(ip)) { |
476 | tr->tr_num_buf++; | |
477 | list_add(&bd->bd_list_tr, &tr->tr_list_buf); | |
478 | } | |
2332c443 RP |
479 | gfs2_log_unlock(sdp); |
480 | if (!list_empty(&le->le_list)) | |
481 | return; | |
482 | ||
b61dde79 | 483 | gfs2_trans_add_gl(bd->bd_gl); |
2332c443 RP |
484 | if (gfs2_is_jdata(ip)) { |
485 | sdp->sd_log_num_jdata++; | |
486 | gfs2_pin(sdp, bd->bd_bh); | |
487 | tr->tr_num_databuf_new++; | |
13538b8e | 488 | } |
2332c443 | 489 | gfs2_log_lock(sdp); |
bdcb8856 | 490 | sdp->sd_log_num_databuf++; |
2332c443 | 491 | list_add(&le->le_list, &sdp->sd_log_le_databuf); |
b3b94faa DT |
492 | gfs2_log_unlock(sdp); |
493 | } | |
494 | ||
18ec7d5c SW |
495 | static int gfs2_check_magic(struct buffer_head *bh) |
496 | { | |
497 | struct page *page = bh->b_page; | |
498 | void *kaddr; | |
499 | __be32 *ptr; | |
500 | int rv = 0; | |
501 | ||
502 | kaddr = kmap_atomic(page, KM_USER0); | |
503 | ptr = kaddr + bh_offset(bh); | |
504 | if (*ptr == cpu_to_be32(GFS2_MAGIC)) | |
505 | rv = 1; | |
c312c4fd | 506 | kunmap_atomic(kaddr, KM_USER0); |
18ec7d5c SW |
507 | |
508 | return rv; | |
509 | } | |
510 | ||
511 | /** | |
512 | * databuf_lo_before_commit - Scan the data buffers, writing as we go | |
513 | * | |
514 | * Here we scan through the lists of buffers and make the assumption | |
515 | * that any buffer thats been pinned is being journaled, and that | |
516 | * any unpinned buffer is an ordered write data buffer and therefore | |
517 | * will be written back rather than journaled. | |
518 | */ | |
b3b94faa DT |
519 | static void databuf_lo_before_commit(struct gfs2_sbd *sdp) |
520 | { | |
b3b94faa | 521 | LIST_HEAD(started); |
18ec7d5c | 522 | struct gfs2_bufdata *bd1 = NULL, *bd2, *bdt; |
70209331 | 523 | struct buffer_head *bh = NULL,*bh1 = NULL; |
18ec7d5c SW |
524 | struct gfs2_log_descriptor *ld; |
525 | unsigned int limit; | |
bdcb8856 | 526 | unsigned int total_dbuf; |
18ec7d5c SW |
527 | unsigned int total_jdata = sdp->sd_log_num_jdata; |
528 | unsigned int num, n; | |
f55ab26a | 529 | __be64 *ptr = NULL; |
b3b94faa | 530 | |
2332c443 | 531 | limit = databuf_limit(sdp); |
b3b94faa | 532 | |
18ec7d5c SW |
533 | /* |
534 | * Start writing ordered buffers, write journaled buffers | |
535 | * into the log along with a header | |
536 | */ | |
f55ab26a | 537 | gfs2_log_lock(sdp); |
bdcb8856 | 538 | total_dbuf = sdp->sd_log_num_databuf; |
568f4c96 SW |
539 | bd2 = bd1 = list_prepare_entry(bd1, &sdp->sd_log_le_databuf, |
540 | bd_le.le_list); | |
18ec7d5c SW |
541 | while(total_dbuf) { |
542 | num = total_jdata; | |
543 | if (num > limit) | |
544 | num = limit; | |
545 | n = 0; | |
568f4c96 SW |
546 | list_for_each_entry_safe_continue(bd1, bdt, |
547 | &sdp->sd_log_le_databuf, | |
548 | bd_le.le_list) { | |
70209331 RC |
549 | /* store off the buffer head in a local ptr since |
550 | * gfs2_bufdata might change when we drop the log lock | |
551 | */ | |
552 | bh1 = bd1->bd_bh; | |
553 | ||
18ec7d5c | 554 | /* An ordered write buffer */ |
70209331 | 555 | if (bh1 && !buffer_pinned(bh1)) { |
18ec7d5c SW |
556 | list_move(&bd1->bd_le.le_list, &started); |
557 | if (bd1 == bd2) { | |
558 | bd2 = NULL; | |
568f4c96 SW |
559 | bd2 = list_prepare_entry(bd2, |
560 | &sdp->sd_log_le_databuf, | |
561 | bd_le.le_list); | |
18ec7d5c SW |
562 | } |
563 | total_dbuf--; | |
70209331 RC |
564 | if (bh1) { |
565 | if (buffer_dirty(bh1)) { | |
566 | get_bh(bh1); | |
567 | ||
f55ab26a | 568 | gfs2_log_unlock(sdp); |
70209331 RC |
569 | |
570 | ll_rw_block(SWRITE, 1, &bh1); | |
571 | brelse(bh1); | |
572 | ||
f55ab26a | 573 | gfs2_log_lock(sdp); |
18ec7d5c | 574 | } |
18ec7d5c SW |
575 | continue; |
576 | } | |
18ec7d5c | 577 | continue; |
70209331 | 578 | } else if (bh1) { /* A journaled buffer */ |
18ec7d5c SW |
579 | int magic; |
580 | gfs2_log_unlock(sdp); | |
18ec7d5c SW |
581 | if (!bh) { |
582 | bh = gfs2_log_get_buf(sdp); | |
568f4c96 SW |
583 | ld = (struct gfs2_log_descriptor *) |
584 | bh->b_data; | |
2332c443 RP |
585 | ptr = (__be64 *)(bh->b_data + |
586 | DATABUF_OFFSET); | |
568f4c96 SW |
587 | ld->ld_header.mh_magic = |
588 | cpu_to_be32(GFS2_MAGIC); | |
589 | ld->ld_header.mh_type = | |
e3167ded | 590 | cpu_to_be32(GFS2_METATYPE_LD); |
568f4c96 | 591 | ld->ld_header.mh_format = |
e3167ded | 592 | cpu_to_be32(GFS2_FORMAT_LD); |
568f4c96 SW |
593 | ld->ld_type = |
594 | cpu_to_be32(GFS2_LOG_DESC_JDATA); | |
18ec7d5c SW |
595 | ld->ld_length = cpu_to_be32(num + 1); |
596 | ld->ld_data1 = cpu_to_be32(num); | |
597 | ld->ld_data2 = cpu_to_be32(0); | |
598 | memset(ld->ld_reserved, 0, sizeof(ld->ld_reserved)); | |
599 | } | |
70209331 RC |
600 | magic = gfs2_check_magic(bh1); |
601 | *ptr++ = cpu_to_be64(bh1->b_blocknr); | |
18ec7d5c | 602 | *ptr++ = cpu_to_be64((__u64)magic); |
70209331 | 603 | clear_buffer_escaped(bh1); |
18ec7d5c | 604 | if (unlikely(magic != 0)) |
70209331 | 605 | set_buffer_escaped(bh1); |
f55ab26a | 606 | gfs2_log_lock(sdp); |
2332c443 | 607 | if (++n >= num) |
18ec7d5c | 608 | break; |
70209331 | 609 | } else if (!bh1) { |
623d9355 SW |
610 | total_dbuf--; |
611 | sdp->sd_log_num_databuf--; | |
612 | list_del_init(&bd1->bd_le.le_list); | |
613 | if (bd1 == bd2) { | |
614 | bd2 = NULL; | |
615 | bd2 = list_prepare_entry(bd2, | |
616 | &sdp->sd_log_le_databuf, | |
617 | bd_le.le_list); | |
618 | } | |
619 | kmem_cache_free(gfs2_bufdata_cachep, bd1); | |
18ec7d5c SW |
620 | } |
621 | } | |
f55ab26a | 622 | gfs2_log_unlock(sdp); |
b3b94faa | 623 | if (bh) { |
8fb68595 | 624 | set_buffer_mapped(bh); |
18ec7d5c SW |
625 | set_buffer_dirty(bh); |
626 | ll_rw_block(WRITE, 1, &bh); | |
627 | bh = NULL; | |
628 | } | |
629 | n = 0; | |
f55ab26a | 630 | gfs2_log_lock(sdp); |
568f4c96 SW |
631 | list_for_each_entry_continue(bd2, &sdp->sd_log_le_databuf, |
632 | bd_le.le_list) { | |
18ec7d5c SW |
633 | if (!bd2->bd_bh) |
634 | continue; | |
635 | /* copy buffer if it needs escaping */ | |
f55ab26a | 636 | gfs2_log_unlock(sdp); |
18ec7d5c SW |
637 | if (unlikely(buffer_escaped(bd2->bd_bh))) { |
638 | void *kaddr; | |
639 | struct page *page = bd2->bd_bh->b_page; | |
640 | bh = gfs2_log_get_buf(sdp); | |
641 | kaddr = kmap_atomic(page, KM_USER0); | |
568f4c96 SW |
642 | memcpy(bh->b_data, |
643 | kaddr + bh_offset(bd2->bd_bh), | |
644 | sdp->sd_sb.sb_bsize); | |
c312c4fd | 645 | kunmap_atomic(kaddr, KM_USER0); |
18ec7d5c SW |
646 | *(__be32 *)bh->b_data = 0; |
647 | } else { | |
648 | bh = gfs2_log_fake_buf(sdp, bd2->bd_bh); | |
b3b94faa | 649 | } |
18ec7d5c SW |
650 | set_buffer_dirty(bh); |
651 | ll_rw_block(WRITE, 1, &bh); | |
f55ab26a | 652 | gfs2_log_lock(sdp); |
18ec7d5c SW |
653 | if (++n >= num) |
654 | break; | |
655 | } | |
656 | bh = NULL; | |
bdcb8856 | 657 | BUG_ON(total_dbuf < num); |
18ec7d5c SW |
658 | total_dbuf -= num; |
659 | total_jdata -= num; | |
b3b94faa | 660 | } |
f55ab26a SW |
661 | gfs2_log_unlock(sdp); |
662 | ||
18ec7d5c | 663 | /* Wait on all ordered buffers */ |
b3b94faa | 664 | while (!list_empty(&started)) { |
13538b8e | 665 | gfs2_log_lock(sdp); |
568f4c96 SW |
666 | bd1 = list_entry(started.next, struct gfs2_bufdata, |
667 | bd_le.le_list); | |
08867605 | 668 | list_del_init(&bd1->bd_le.le_list); |
b3b94faa | 669 | sdp->sd_log_num_databuf--; |
18ec7d5c | 670 | bh = bd1->bd_bh; |
b3b94faa | 671 | if (bh) { |
5c676f6d | 672 | bh->b_private = NULL; |
15d00c0b | 673 | get_bh(bh); |
b3b94faa DT |
674 | gfs2_log_unlock(sdp); |
675 | wait_on_buffer(bh); | |
676 | brelse(bh); | |
677 | } else | |
678 | gfs2_log_unlock(sdp); | |
679 | ||
3a8476dd | 680 | kmem_cache_free(gfs2_bufdata_cachep, bd1); |
b3b94faa DT |
681 | } |
682 | ||
18ec7d5c SW |
683 | /* We've removed all the ordered write bufs here, so only jdata left */ |
684 | gfs2_assert_warn(sdp, sdp->sd_log_num_databuf == sdp->sd_log_num_jdata); | |
685 | } | |
686 | ||
687 | static int databuf_lo_scan_elements(struct gfs2_jdesc *jd, unsigned int start, | |
688 | struct gfs2_log_descriptor *ld, | |
689 | __be64 *ptr, int pass) | |
690 | { | |
feaa7bba SW |
691 | struct gfs2_inode *ip = GFS2_I(jd->jd_inode); |
692 | struct gfs2_sbd *sdp = GFS2_SB(jd->jd_inode); | |
5c676f6d | 693 | struct gfs2_glock *gl = ip->i_gl; |
18ec7d5c SW |
694 | unsigned int blks = be32_to_cpu(ld->ld_data1); |
695 | struct buffer_head *bh_log, *bh_ip; | |
cd915493 SW |
696 | u64 blkno; |
697 | u64 esc; | |
18ec7d5c SW |
698 | int error = 0; |
699 | ||
700 | if (pass != 1 || be32_to_cpu(ld->ld_type) != GFS2_LOG_DESC_JDATA) | |
701 | return 0; | |
702 | ||
703 | gfs2_replay_incr_blk(sdp, &start); | |
704 | for (; blks; gfs2_replay_incr_blk(sdp, &start), blks--) { | |
705 | blkno = be64_to_cpu(*ptr++); | |
706 | esc = be64_to_cpu(*ptr++); | |
707 | ||
708 | sdp->sd_found_blocks++; | |
709 | ||
710 | if (gfs2_revoke_check(sdp, blkno, start)) | |
711 | continue; | |
712 | ||
713 | error = gfs2_replay_read_block(jd, start, &bh_log); | |
714 | if (error) | |
715 | return error; | |
716 | ||
717 | bh_ip = gfs2_meta_new(gl, blkno); | |
718 | memcpy(bh_ip->b_data, bh_log->b_data, bh_log->b_size); | |
719 | ||
720 | /* Unescape */ | |
721 | if (esc) { | |
722 | __be32 *eptr = (__be32 *)bh_ip->b_data; | |
723 | *eptr = cpu_to_be32(GFS2_MAGIC); | |
724 | } | |
725 | mark_buffer_dirty(bh_ip); | |
726 | ||
727 | brelse(bh_log); | |
728 | brelse(bh_ip); | |
729 | if (error) | |
730 | break; | |
731 | ||
732 | sdp->sd_replayed_blocks++; | |
733 | } | |
734 | ||
735 | return error; | |
736 | } | |
737 | ||
738 | /* FIXME: sort out accounting for log blocks etc. */ | |
739 | ||
740 | static void databuf_lo_after_scan(struct gfs2_jdesc *jd, int error, int pass) | |
741 | { | |
feaa7bba SW |
742 | struct gfs2_inode *ip = GFS2_I(jd->jd_inode); |
743 | struct gfs2_sbd *sdp = GFS2_SB(jd->jd_inode); | |
18ec7d5c SW |
744 | |
745 | if (error) { | |
7276b3b0 | 746 | gfs2_meta_sync(ip->i_gl); |
18ec7d5c SW |
747 | return; |
748 | } | |
749 | if (pass != 1) | |
750 | return; | |
751 | ||
752 | /* data sync? */ | |
7276b3b0 | 753 | gfs2_meta_sync(ip->i_gl); |
18ec7d5c SW |
754 | |
755 | fs_info(sdp, "jid=%u: Replayed %u of %u data blocks\n", | |
756 | jd->jd_jid, sdp->sd_replayed_blocks, sdp->sd_found_blocks); | |
757 | } | |
758 | ||
759 | static void databuf_lo_after_commit(struct gfs2_sbd *sdp, struct gfs2_ail *ai) | |
760 | { | |
761 | struct list_head *head = &sdp->sd_log_le_databuf; | |
762 | struct gfs2_bufdata *bd; | |
763 | ||
764 | while (!list_empty(head)) { | |
765 | bd = list_entry(head->next, struct gfs2_bufdata, bd_le.le_list); | |
b8e1aabf | 766 | list_del_init(&bd->bd_le.le_list); |
18ec7d5c SW |
767 | sdp->sd_log_num_databuf--; |
768 | sdp->sd_log_num_jdata--; | |
769 | gfs2_unpin(sdp, bd->bd_bh, ai); | |
18ec7d5c | 770 | } |
b3b94faa | 771 | gfs2_assert_warn(sdp, !sdp->sd_log_num_databuf); |
18ec7d5c | 772 | gfs2_assert_warn(sdp, !sdp->sd_log_num_jdata); |
b3b94faa DT |
773 | } |
774 | ||
18ec7d5c | 775 | |
b09e593d | 776 | const struct gfs2_log_operations gfs2_glock_lops = { |
b3b94faa DT |
777 | .lo_add = glock_lo_add, |
778 | .lo_after_commit = glock_lo_after_commit, | |
ea67eedb | 779 | .lo_name = "glock", |
b3b94faa DT |
780 | }; |
781 | ||
b09e593d | 782 | const struct gfs2_log_operations gfs2_buf_lops = { |
b3b94faa DT |
783 | .lo_add = buf_lo_add, |
784 | .lo_incore_commit = buf_lo_incore_commit, | |
785 | .lo_before_commit = buf_lo_before_commit, | |
786 | .lo_after_commit = buf_lo_after_commit, | |
787 | .lo_before_scan = buf_lo_before_scan, | |
788 | .lo_scan_elements = buf_lo_scan_elements, | |
789 | .lo_after_scan = buf_lo_after_scan, | |
ea67eedb | 790 | .lo_name = "buf", |
b3b94faa DT |
791 | }; |
792 | ||
b09e593d | 793 | const struct gfs2_log_operations gfs2_revoke_lops = { |
b3b94faa DT |
794 | .lo_add = revoke_lo_add, |
795 | .lo_before_commit = revoke_lo_before_commit, | |
796 | .lo_before_scan = revoke_lo_before_scan, | |
797 | .lo_scan_elements = revoke_lo_scan_elements, | |
798 | .lo_after_scan = revoke_lo_after_scan, | |
ea67eedb | 799 | .lo_name = "revoke", |
b3b94faa DT |
800 | }; |
801 | ||
b09e593d | 802 | const struct gfs2_log_operations gfs2_rg_lops = { |
b3b94faa DT |
803 | .lo_add = rg_lo_add, |
804 | .lo_after_commit = rg_lo_after_commit, | |
ea67eedb | 805 | .lo_name = "rg", |
b3b94faa DT |
806 | }; |
807 | ||
b09e593d | 808 | const struct gfs2_log_operations gfs2_databuf_lops = { |
b3b94faa | 809 | .lo_add = databuf_lo_add, |
18ec7d5c | 810 | .lo_incore_commit = buf_lo_incore_commit, |
b3b94faa | 811 | .lo_before_commit = databuf_lo_before_commit, |
18ec7d5c SW |
812 | .lo_after_commit = databuf_lo_after_commit, |
813 | .lo_scan_elements = databuf_lo_scan_elements, | |
814 | .lo_after_scan = databuf_lo_after_scan, | |
ea67eedb | 815 | .lo_name = "databuf", |
b3b94faa DT |
816 | }; |
817 | ||
b09e593d | 818 | const struct gfs2_log_operations *gfs2_log_ops[] = { |
b3b94faa DT |
819 | &gfs2_glock_lops, |
820 | &gfs2_buf_lops, | |
821 | &gfs2_revoke_lops, | |
822 | &gfs2_rg_lops, | |
823 | &gfs2_databuf_lops, | |
ea67eedb | 824 | NULL, |
b3b94faa DT |
825 | }; |
826 |