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 | 29 | |
9b9107a5 SW |
30 | /** |
31 | * gfs2_pin - Pin a buffer in memory | |
32 | * @sdp: The superblock | |
33 | * @bh: The buffer to be pinned | |
34 | * | |
35 | * The log lock must be held when calling this function | |
36 | */ | |
37 | static void gfs2_pin(struct gfs2_sbd *sdp, struct buffer_head *bh) | |
38 | { | |
39 | struct gfs2_bufdata *bd; | |
40 | ||
41 | gfs2_assert_withdraw(sdp, test_bit(SDF_JOURNAL_LIVE, &sdp->sd_flags)); | |
42 | ||
43 | clear_buffer_dirty(bh); | |
44 | if (test_set_buffer_pinned(bh)) | |
45 | gfs2_assert_withdraw(sdp, 0); | |
46 | if (!buffer_uptodate(bh)) | |
47 | gfs2_io_error_bh(sdp, bh); | |
48 | bd = bh->b_private; | |
49 | /* If this buffer is in the AIL and it has already been written | |
50 | * to in-place disk block, remove it from the AIL. | |
51 | */ | |
52 | if (bd->bd_ail) | |
53 | list_move(&bd->bd_ail_st_list, &bd->bd_ail->ai_ail2_list); | |
54 | get_bh(bh); | |
55 | } | |
56 | ||
57 | /** | |
58 | * gfs2_unpin - Unpin a buffer | |
59 | * @sdp: the filesystem the buffer belongs to | |
60 | * @bh: The buffer to unpin | |
61 | * @ai: | |
62 | * | |
63 | */ | |
64 | ||
65 | static void gfs2_unpin(struct gfs2_sbd *sdp, struct buffer_head *bh, | |
66 | struct gfs2_ail *ai) | |
67 | { | |
68 | struct gfs2_bufdata *bd = bh->b_private; | |
69 | ||
70 | gfs2_assert_withdraw(sdp, buffer_uptodate(bh)); | |
71 | ||
72 | if (!buffer_pinned(bh)) | |
73 | gfs2_assert_withdraw(sdp, 0); | |
74 | ||
75 | lock_buffer(bh); | |
76 | mark_buffer_dirty(bh); | |
77 | clear_buffer_pinned(bh); | |
78 | ||
79 | gfs2_log_lock(sdp); | |
80 | if (bd->bd_ail) { | |
81 | list_del(&bd->bd_ail_st_list); | |
82 | brelse(bh); | |
83 | } else { | |
84 | struct gfs2_glock *gl = bd->bd_gl; | |
85 | list_add(&bd->bd_ail_gl_list, &gl->gl_ail_list); | |
86 | atomic_inc(&gl->gl_ail_count); | |
87 | } | |
88 | bd->bd_ail = ai; | |
89 | list_add(&bd->bd_ail_st_list, &ai->ai_ail1_list); | |
90 | gfs2_log_unlock(sdp); | |
91 | unlock_buffer(bh); | |
92 | } | |
93 | ||
94 | static void __glock_lo_add(struct gfs2_sbd *sdp, struct gfs2_log_element *le) | |
b3b94faa DT |
95 | { |
96 | struct gfs2_glock *gl; | |
5c676f6d | 97 | struct gfs2_trans *tr = current->journal_info; |
b3b94faa | 98 | |
5c676f6d | 99 | tr->tr_touched = 1; |
b3b94faa | 100 | |
b3b94faa DT |
101 | gl = container_of(le, struct gfs2_glock, gl_le); |
102 | if (gfs2_assert_withdraw(sdp, gfs2_glock_is_held_excl(gl))) | |
103 | return; | |
b3b94faa | 104 | |
9b9107a5 | 105 | if (!list_empty(&le->le_list)) |
68835625 | 106 | return; |
9b9107a5 | 107 | |
68835625 BM |
108 | gfs2_glock_hold(gl); |
109 | set_bit(GLF_DIRTY, &gl->gl_flags); | |
b3b94faa DT |
110 | sdp->sd_log_num_gl++; |
111 | list_add(&le->le_list, &sdp->sd_log_le_gl); | |
9b9107a5 SW |
112 | } |
113 | ||
114 | static void glock_lo_add(struct gfs2_sbd *sdp, struct gfs2_log_element *le) | |
115 | { | |
116 | gfs2_log_lock(sdp); | |
117 | __glock_lo_add(sdp, le); | |
b3b94faa DT |
118 | gfs2_log_unlock(sdp); |
119 | } | |
120 | ||
121 | static void glock_lo_after_commit(struct gfs2_sbd *sdp, struct gfs2_ail *ai) | |
122 | { | |
123 | struct list_head *head = &sdp->sd_log_le_gl; | |
124 | struct gfs2_glock *gl; | |
125 | ||
126 | while (!list_empty(head)) { | |
127 | gl = list_entry(head->next, struct gfs2_glock, gl_le.le_list); | |
128 | list_del_init(&gl->gl_le.le_list); | |
129 | sdp->sd_log_num_gl--; | |
130 | ||
131 | gfs2_assert_withdraw(sdp, gfs2_glock_is_held_excl(gl)); | |
132 | gfs2_glock_put(gl); | |
133 | } | |
134 | gfs2_assert_warn(sdp, !sdp->sd_log_num_gl); | |
135 | } | |
136 | ||
137 | static void buf_lo_add(struct gfs2_sbd *sdp, struct gfs2_log_element *le) | |
138 | { | |
139 | struct gfs2_bufdata *bd = container_of(le, struct gfs2_bufdata, bd_le); | |
140 | struct gfs2_trans *tr; | |
141 | ||
9b9107a5 | 142 | lock_buffer(bd->bd_bh); |
8bd95727 | 143 | gfs2_log_lock(sdp); |
9b9107a5 SW |
144 | if (!list_empty(&bd->bd_list_tr)) |
145 | goto out; | |
5c676f6d | 146 | tr = current->journal_info; |
b3b94faa DT |
147 | tr->tr_touched = 1; |
148 | tr->tr_num_buf++; | |
149 | list_add(&bd->bd_list_tr, &tr->tr_list_buf); | |
b3b94faa | 150 | if (!list_empty(&le->le_list)) |
9b9107a5 SW |
151 | goto out; |
152 | __glock_lo_add(sdp, &bd->bd_gl->gl_le); | |
b3b94faa | 153 | gfs2_meta_check(sdp, bd->bd_bh); |
a98ab220 | 154 | gfs2_pin(sdp, bd->bd_bh); |
b3b94faa DT |
155 | sdp->sd_log_num_buf++; |
156 | list_add(&le->le_list, &sdp->sd_log_le_buf); | |
b3b94faa | 157 | tr->tr_num_buf_new++; |
9b9107a5 SW |
158 | out: |
159 | gfs2_log_unlock(sdp); | |
160 | unlock_buffer(bd->bd_bh); | |
b3b94faa DT |
161 | } |
162 | ||
163 | static void buf_lo_incore_commit(struct gfs2_sbd *sdp, struct gfs2_trans *tr) | |
164 | { | |
165 | struct list_head *head = &tr->tr_list_buf; | |
166 | struct gfs2_bufdata *bd; | |
167 | ||
8bd95727 | 168 | gfs2_log_lock(sdp); |
b3b94faa DT |
169 | while (!list_empty(head)) { |
170 | bd = list_entry(head->next, struct gfs2_bufdata, bd_list_tr); | |
171 | list_del_init(&bd->bd_list_tr); | |
172 | tr->tr_num_buf--; | |
173 | } | |
8bd95727 | 174 | gfs2_log_unlock(sdp); |
b3b94faa DT |
175 | gfs2_assert_warn(sdp, !tr->tr_num_buf); |
176 | } | |
177 | ||
178 | static void buf_lo_before_commit(struct gfs2_sbd *sdp) | |
179 | { | |
180 | struct buffer_head *bh; | |
181 | struct gfs2_log_descriptor *ld; | |
182 | struct gfs2_bufdata *bd1 = NULL, *bd2; | |
905d2aef | 183 | unsigned int total; |
2332c443 | 184 | unsigned int offset = BUF_OFFSET; |
b3b94faa DT |
185 | unsigned int limit; |
186 | unsigned int num; | |
187 | unsigned n; | |
188 | __be64 *ptr; | |
189 | ||
2332c443 | 190 | limit = buf_limit(sdp); |
b3b94faa DT |
191 | /* for 4k blocks, limit = 503 */ |
192 | ||
905d2aef BP |
193 | gfs2_log_lock(sdp); |
194 | total = sdp->sd_log_num_buf; | |
b3b94faa DT |
195 | bd1 = bd2 = list_prepare_entry(bd1, &sdp->sd_log_le_buf, bd_le.le_list); |
196 | while(total) { | |
197 | num = total; | |
198 | if (total > limit) | |
199 | num = limit; | |
905d2aef | 200 | gfs2_log_unlock(sdp); |
b3b94faa | 201 | bh = gfs2_log_get_buf(sdp); |
905d2aef | 202 | gfs2_log_lock(sdp); |
b3b94faa DT |
203 | ld = (struct gfs2_log_descriptor *)bh->b_data; |
204 | ptr = (__be64 *)(bh->b_data + offset); | |
205 | ld->ld_header.mh_magic = cpu_to_be32(GFS2_MAGIC); | |
e3167ded SW |
206 | ld->ld_header.mh_type = cpu_to_be32(GFS2_METATYPE_LD); |
207 | ld->ld_header.mh_format = cpu_to_be32(GFS2_FORMAT_LD); | |
b3b94faa DT |
208 | ld->ld_type = cpu_to_be32(GFS2_LOG_DESC_METADATA); |
209 | ld->ld_length = cpu_to_be32(num + 1); | |
210 | ld->ld_data1 = cpu_to_be32(num); | |
211 | ld->ld_data2 = cpu_to_be32(0); | |
212 | memset(ld->ld_reserved, 0, sizeof(ld->ld_reserved)); | |
213 | ||
214 | n = 0; | |
568f4c96 SW |
215 | list_for_each_entry_continue(bd1, &sdp->sd_log_le_buf, |
216 | bd_le.le_list) { | |
b3b94faa DT |
217 | *ptr++ = cpu_to_be64(bd1->bd_bh->b_blocknr); |
218 | if (++n >= num) | |
219 | break; | |
220 | } | |
221 | ||
905d2aef | 222 | gfs2_log_unlock(sdp); |
b3b94faa DT |
223 | set_buffer_dirty(bh); |
224 | ll_rw_block(WRITE, 1, &bh); | |
905d2aef | 225 | gfs2_log_lock(sdp); |
b3b94faa DT |
226 | |
227 | n = 0; | |
568f4c96 SW |
228 | list_for_each_entry_continue(bd2, &sdp->sd_log_le_buf, |
229 | bd_le.le_list) { | |
905d2aef | 230 | gfs2_log_unlock(sdp); |
b3b94faa DT |
231 | bh = gfs2_log_fake_buf(sdp, bd2->bd_bh); |
232 | set_buffer_dirty(bh); | |
233 | ll_rw_block(WRITE, 1, &bh); | |
905d2aef | 234 | gfs2_log_lock(sdp); |
b3b94faa DT |
235 | if (++n >= num) |
236 | break; | |
237 | } | |
238 | ||
905d2aef | 239 | BUG_ON(total < num); |
b3b94faa DT |
240 | total -= num; |
241 | } | |
905d2aef | 242 | gfs2_log_unlock(sdp); |
b3b94faa DT |
243 | } |
244 | ||
245 | static void buf_lo_after_commit(struct gfs2_sbd *sdp, struct gfs2_ail *ai) | |
246 | { | |
247 | struct list_head *head = &sdp->sd_log_le_buf; | |
248 | struct gfs2_bufdata *bd; | |
249 | ||
250 | while (!list_empty(head)) { | |
251 | bd = list_entry(head->next, struct gfs2_bufdata, bd_le.le_list); | |
252 | list_del_init(&bd->bd_le.le_list); | |
253 | sdp->sd_log_num_buf--; | |
254 | ||
a98ab220 | 255 | gfs2_unpin(sdp, bd->bd_bh, ai); |
b3b94faa DT |
256 | } |
257 | gfs2_assert_warn(sdp, !sdp->sd_log_num_buf); | |
258 | } | |
259 | ||
260 | static void buf_lo_before_scan(struct gfs2_jdesc *jd, | |
55167622 | 261 | struct gfs2_log_header_host *head, int pass) |
b3b94faa | 262 | { |
feaa7bba | 263 | struct gfs2_sbd *sdp = GFS2_SB(jd->jd_inode); |
b3b94faa DT |
264 | |
265 | if (pass != 0) | |
266 | return; | |
267 | ||
268 | sdp->sd_found_blocks = 0; | |
269 | sdp->sd_replayed_blocks = 0; | |
270 | } | |
271 | ||
272 | static int buf_lo_scan_elements(struct gfs2_jdesc *jd, unsigned int start, | |
273 | struct gfs2_log_descriptor *ld, __be64 *ptr, | |
274 | int pass) | |
275 | { | |
feaa7bba SW |
276 | struct gfs2_inode *ip = GFS2_I(jd->jd_inode); |
277 | struct gfs2_sbd *sdp = GFS2_SB(jd->jd_inode); | |
5c676f6d | 278 | struct gfs2_glock *gl = ip->i_gl; |
b3b94faa DT |
279 | unsigned int blks = be32_to_cpu(ld->ld_data1); |
280 | struct buffer_head *bh_log, *bh_ip; | |
cd915493 | 281 | u64 blkno; |
b3b94faa DT |
282 | int error = 0; |
283 | ||
284 | if (pass != 1 || be32_to_cpu(ld->ld_type) != GFS2_LOG_DESC_METADATA) | |
285 | return 0; | |
286 | ||
287 | gfs2_replay_incr_blk(sdp, &start); | |
288 | ||
289 | for (; blks; gfs2_replay_incr_blk(sdp, &start), blks--) { | |
290 | blkno = be64_to_cpu(*ptr++); | |
291 | ||
292 | sdp->sd_found_blocks++; | |
293 | ||
294 | if (gfs2_revoke_check(sdp, blkno, start)) | |
295 | continue; | |
296 | ||
297 | error = gfs2_replay_read_block(jd, start, &bh_log); | |
82ffa516 SW |
298 | if (error) |
299 | return error; | |
b3b94faa DT |
300 | |
301 | bh_ip = gfs2_meta_new(gl, blkno); | |
302 | memcpy(bh_ip->b_data, bh_log->b_data, bh_log->b_size); | |
303 | ||
304 | if (gfs2_meta_check(sdp, bh_ip)) | |
305 | error = -EIO; | |
306 | else | |
307 | mark_buffer_dirty(bh_ip); | |
308 | ||
309 | brelse(bh_log); | |
310 | brelse(bh_ip); | |
311 | ||
312 | if (error) | |
313 | break; | |
314 | ||
315 | sdp->sd_replayed_blocks++; | |
316 | } | |
317 | ||
318 | return error; | |
319 | } | |
320 | ||
321 | static void buf_lo_after_scan(struct gfs2_jdesc *jd, int error, int pass) | |
322 | { | |
feaa7bba SW |
323 | struct gfs2_inode *ip = GFS2_I(jd->jd_inode); |
324 | struct gfs2_sbd *sdp = GFS2_SB(jd->jd_inode); | |
b3b94faa DT |
325 | |
326 | if (error) { | |
7276b3b0 | 327 | gfs2_meta_sync(ip->i_gl); |
b3b94faa DT |
328 | return; |
329 | } | |
330 | if (pass != 1) | |
331 | return; | |
332 | ||
7276b3b0 | 333 | gfs2_meta_sync(ip->i_gl); |
b3b94faa DT |
334 | |
335 | fs_info(sdp, "jid=%u: Replayed %u of %u blocks\n", | |
336 | jd->jd_jid, sdp->sd_replayed_blocks, sdp->sd_found_blocks); | |
337 | } | |
338 | ||
339 | static void revoke_lo_add(struct gfs2_sbd *sdp, struct gfs2_log_element *le) | |
340 | { | |
341 | struct gfs2_trans *tr; | |
342 | ||
5c676f6d | 343 | tr = current->journal_info; |
b3b94faa DT |
344 | tr->tr_touched = 1; |
345 | tr->tr_num_revoke++; | |
346 | ||
347 | gfs2_log_lock(sdp); | |
348 | sdp->sd_log_num_revoke++; | |
349 | list_add(&le->le_list, &sdp->sd_log_le_revoke); | |
350 | gfs2_log_unlock(sdp); | |
351 | } | |
352 | ||
353 | static void revoke_lo_before_commit(struct gfs2_sbd *sdp) | |
354 | { | |
355 | struct gfs2_log_descriptor *ld; | |
356 | struct gfs2_meta_header *mh; | |
357 | struct buffer_head *bh; | |
358 | unsigned int offset; | |
359 | struct list_head *head = &sdp->sd_log_le_revoke; | |
360 | struct gfs2_revoke *rv; | |
361 | ||
362 | if (!sdp->sd_log_num_revoke) | |
363 | return; | |
364 | ||
365 | bh = gfs2_log_get_buf(sdp); | |
366 | ld = (struct gfs2_log_descriptor *)bh->b_data; | |
367 | ld->ld_header.mh_magic = cpu_to_be32(GFS2_MAGIC); | |
e3167ded SW |
368 | ld->ld_header.mh_type = cpu_to_be32(GFS2_METATYPE_LD); |
369 | ld->ld_header.mh_format = cpu_to_be32(GFS2_FORMAT_LD); | |
b3b94faa | 370 | ld->ld_type = cpu_to_be32(GFS2_LOG_DESC_REVOKE); |
568f4c96 | 371 | ld->ld_length = cpu_to_be32(gfs2_struct2blk(sdp, sdp->sd_log_num_revoke, |
cd915493 | 372 | sizeof(u64))); |
b3b94faa DT |
373 | ld->ld_data1 = cpu_to_be32(sdp->sd_log_num_revoke); |
374 | ld->ld_data2 = cpu_to_be32(0); | |
375 | memset(ld->ld_reserved, 0, sizeof(ld->ld_reserved)); | |
376 | offset = sizeof(struct gfs2_log_descriptor); | |
377 | ||
378 | while (!list_empty(head)) { | |
379 | rv = list_entry(head->next, struct gfs2_revoke, rv_le.le_list); | |
13538b8e | 380 | list_del_init(&rv->rv_le.le_list); |
b3b94faa DT |
381 | sdp->sd_log_num_revoke--; |
382 | ||
cd915493 | 383 | if (offset + sizeof(u64) > sdp->sd_sb.sb_bsize) { |
b3b94faa DT |
384 | set_buffer_dirty(bh); |
385 | ll_rw_block(WRITE, 1, &bh); | |
386 | ||
387 | bh = gfs2_log_get_buf(sdp); | |
388 | mh = (struct gfs2_meta_header *)bh->b_data; | |
389 | mh->mh_magic = cpu_to_be32(GFS2_MAGIC); | |
e3167ded SW |
390 | mh->mh_type = cpu_to_be32(GFS2_METATYPE_LB); |
391 | mh->mh_format = cpu_to_be32(GFS2_FORMAT_LB); | |
b3b94faa DT |
392 | offset = sizeof(struct gfs2_meta_header); |
393 | } | |
394 | ||
395 | *(__be64 *)(bh->b_data + offset) = cpu_to_be64(rv->rv_blkno); | |
396 | kfree(rv); | |
397 | ||
cd915493 | 398 | offset += sizeof(u64); |
b3b94faa DT |
399 | } |
400 | gfs2_assert_withdraw(sdp, !sdp->sd_log_num_revoke); | |
401 | ||
402 | set_buffer_dirty(bh); | |
403 | ll_rw_block(WRITE, 1, &bh); | |
404 | } | |
405 | ||
406 | static void revoke_lo_before_scan(struct gfs2_jdesc *jd, | |
55167622 | 407 | struct gfs2_log_header_host *head, int pass) |
b3b94faa | 408 | { |
feaa7bba | 409 | struct gfs2_sbd *sdp = GFS2_SB(jd->jd_inode); |
b3b94faa DT |
410 | |
411 | if (pass != 0) | |
412 | return; | |
413 | ||
414 | sdp->sd_found_revokes = 0; | |
415 | sdp->sd_replay_tail = head->lh_tail; | |
416 | } | |
417 | ||
418 | static int revoke_lo_scan_elements(struct gfs2_jdesc *jd, unsigned int start, | |
419 | struct gfs2_log_descriptor *ld, __be64 *ptr, | |
420 | int pass) | |
421 | { | |
feaa7bba | 422 | struct gfs2_sbd *sdp = GFS2_SB(jd->jd_inode); |
b3b94faa DT |
423 | unsigned int blks = be32_to_cpu(ld->ld_length); |
424 | unsigned int revokes = be32_to_cpu(ld->ld_data1); | |
425 | struct buffer_head *bh; | |
426 | unsigned int offset; | |
cd915493 | 427 | u64 blkno; |
b3b94faa DT |
428 | int first = 1; |
429 | int error; | |
430 | ||
431 | if (pass != 0 || be32_to_cpu(ld->ld_type) != GFS2_LOG_DESC_REVOKE) | |
432 | return 0; | |
433 | ||
434 | offset = sizeof(struct gfs2_log_descriptor); | |
435 | ||
436 | for (; blks; gfs2_replay_incr_blk(sdp, &start), blks--) { | |
437 | error = gfs2_replay_read_block(jd, start, &bh); | |
438 | if (error) | |
439 | return error; | |
440 | ||
441 | if (!first) | |
442 | gfs2_metatype_check(sdp, bh, GFS2_METATYPE_LB); | |
443 | ||
cd915493 | 444 | while (offset + sizeof(u64) <= sdp->sd_sb.sb_bsize) { |
b3b94faa DT |
445 | blkno = be64_to_cpu(*(__be64 *)(bh->b_data + offset)); |
446 | ||
447 | error = gfs2_revoke_add(sdp, blkno, start); | |
448 | if (error < 0) | |
449 | return error; | |
450 | else if (error) | |
451 | sdp->sd_found_revokes++; | |
452 | ||
453 | if (!--revokes) | |
454 | break; | |
cd915493 | 455 | offset += sizeof(u64); |
b3b94faa DT |
456 | } |
457 | ||
458 | brelse(bh); | |
459 | offset = sizeof(struct gfs2_meta_header); | |
460 | first = 0; | |
461 | } | |
462 | ||
463 | return 0; | |
464 | } | |
465 | ||
466 | static void revoke_lo_after_scan(struct gfs2_jdesc *jd, int error, int pass) | |
467 | { | |
feaa7bba | 468 | struct gfs2_sbd *sdp = GFS2_SB(jd->jd_inode); |
b3b94faa DT |
469 | |
470 | if (error) { | |
471 | gfs2_revoke_clean(sdp); | |
472 | return; | |
473 | } | |
474 | if (pass != 1) | |
475 | return; | |
476 | ||
477 | fs_info(sdp, "jid=%u: Found %u revoke tags\n", | |
478 | jd->jd_jid, sdp->sd_found_revokes); | |
479 | ||
480 | gfs2_revoke_clean(sdp); | |
481 | } | |
482 | ||
483 | static void rg_lo_add(struct gfs2_sbd *sdp, struct gfs2_log_element *le) | |
484 | { | |
485 | struct gfs2_rgrpd *rgd; | |
5c676f6d | 486 | struct gfs2_trans *tr = current->journal_info; |
b3b94faa | 487 | |
5c676f6d | 488 | tr->tr_touched = 1; |
b3b94faa | 489 | |
b3b94faa | 490 | rgd = container_of(le, struct gfs2_rgrpd, rd_le); |
b3b94faa DT |
491 | |
492 | gfs2_log_lock(sdp); | |
68835625 BM |
493 | if (!list_empty(&le->le_list)){ |
494 | gfs2_log_unlock(sdp); | |
495 | return; | |
496 | } | |
497 | gfs2_rgrp_bh_hold(rgd); | |
b3b94faa DT |
498 | sdp->sd_log_num_rg++; |
499 | list_add(&le->le_list, &sdp->sd_log_le_rg); | |
907b9bce | 500 | gfs2_log_unlock(sdp); |
b3b94faa DT |
501 | } |
502 | ||
503 | static void rg_lo_after_commit(struct gfs2_sbd *sdp, struct gfs2_ail *ai) | |
504 | { | |
505 | struct list_head *head = &sdp->sd_log_le_rg; | |
506 | struct gfs2_rgrpd *rgd; | |
507 | ||
508 | while (!list_empty(head)) { | |
509 | rgd = list_entry(head->next, struct gfs2_rgrpd, rd_le.le_list); | |
510 | list_del_init(&rgd->rd_le.le_list); | |
511 | sdp->sd_log_num_rg--; | |
512 | ||
513 | gfs2_rgrp_repolish_clones(rgd); | |
514 | gfs2_rgrp_bh_put(rgd); | |
515 | } | |
516 | gfs2_assert_warn(sdp, !sdp->sd_log_num_rg); | |
517 | } | |
518 | ||
18ec7d5c SW |
519 | /** |
520 | * databuf_lo_add - Add a databuf to the transaction. | |
521 | * | |
522 | * This is used in two distinct cases: | |
523 | * i) In ordered write mode | |
524 | * We put the data buffer on a list so that we can ensure that its | |
525 | * synced to disk at the right time | |
526 | * ii) In journaled data mode | |
527 | * We need to journal the data block in the same way as metadata in | |
528 | * the functions above. The difference is that here we have a tag | |
529 | * which is two __be64's being the block number (as per meta data) | |
530 | * and a flag which says whether the data block needs escaping or | |
531 | * not. This means we need a new log entry for each 251 or so data | |
532 | * blocks, which isn't an enormous overhead but twice as much as | |
533 | * for normal metadata blocks. | |
534 | */ | |
b3b94faa DT |
535 | static void databuf_lo_add(struct gfs2_sbd *sdp, struct gfs2_log_element *le) |
536 | { | |
18ec7d5c | 537 | struct gfs2_bufdata *bd = container_of(le, struct gfs2_bufdata, bd_le); |
5c676f6d | 538 | struct gfs2_trans *tr = current->journal_info; |
18ec7d5c | 539 | struct address_space *mapping = bd->bd_bh->b_page->mapping; |
feaa7bba | 540 | struct gfs2_inode *ip = GFS2_I(mapping->host); |
b3b94faa | 541 | |
9b9107a5 | 542 | lock_buffer(bd->bd_bh); |
8bd95727 | 543 | gfs2_log_lock(sdp); |
9b9107a5 SW |
544 | if (!list_empty(&bd->bd_list_tr)) |
545 | goto out; | |
2332c443 | 546 | tr->tr_touched = 1; |
773ed1a0 RP |
547 | if (gfs2_is_jdata(ip)) { |
548 | tr->tr_num_buf++; | |
549 | list_add(&bd->bd_list_tr, &tr->tr_list_buf); | |
550 | } | |
2332c443 | 551 | if (!list_empty(&le->le_list)) |
9b9107a5 | 552 | goto out; |
2332c443 | 553 | |
9b9107a5 | 554 | __glock_lo_add(sdp, &bd->bd_gl->gl_le); |
2332c443 | 555 | if (gfs2_is_jdata(ip)) { |
2332c443 RP |
556 | gfs2_pin(sdp, bd->bd_bh); |
557 | tr->tr_num_databuf_new++; | |
d7b616e2 SW |
558 | sdp->sd_log_num_databuf++; |
559 | list_add(&le->le_list, &sdp->sd_log_le_databuf); | |
560 | } else { | |
561 | list_add(&le->le_list, &sdp->sd_log_le_ordered); | |
9b9107a5 | 562 | } |
9b9107a5 | 563 | out: |
b3b94faa | 564 | gfs2_log_unlock(sdp); |
9b9107a5 | 565 | unlock_buffer(bd->bd_bh); |
b3b94faa DT |
566 | } |
567 | ||
18ec7d5c SW |
568 | static int gfs2_check_magic(struct buffer_head *bh) |
569 | { | |
570 | struct page *page = bh->b_page; | |
571 | void *kaddr; | |
572 | __be32 *ptr; | |
573 | int rv = 0; | |
574 | ||
575 | kaddr = kmap_atomic(page, KM_USER0); | |
576 | ptr = kaddr + bh_offset(bh); | |
577 | if (*ptr == cpu_to_be32(GFS2_MAGIC)) | |
578 | rv = 1; | |
c312c4fd | 579 | kunmap_atomic(kaddr, KM_USER0); |
18ec7d5c SW |
580 | |
581 | return rv; | |
582 | } | |
583 | ||
584 | /** | |
585 | * databuf_lo_before_commit - Scan the data buffers, writing as we go | |
586 | * | |
18ec7d5c | 587 | */ |
d7b616e2 | 588 | |
b3b94faa DT |
589 | static void databuf_lo_before_commit(struct gfs2_sbd *sdp) |
590 | { | |
d7b616e2 | 591 | struct gfs2_bufdata *bd1 = NULL, *bd2; |
70209331 | 592 | struct buffer_head *bh = NULL,*bh1 = NULL; |
18ec7d5c SW |
593 | struct gfs2_log_descriptor *ld; |
594 | unsigned int limit; | |
d7b616e2 | 595 | unsigned int total; |
18ec7d5c | 596 | unsigned int num, n; |
f55ab26a | 597 | __be64 *ptr = NULL; |
d7b616e2 SW |
598 | int magic; |
599 | ||
b3b94faa | 600 | |
2332c443 | 601 | limit = databuf_limit(sdp); |
b3b94faa | 602 | |
f55ab26a | 603 | gfs2_log_lock(sdp); |
d7b616e2 | 604 | total = sdp->sd_log_num_databuf; |
568f4c96 SW |
605 | bd2 = bd1 = list_prepare_entry(bd1, &sdp->sd_log_le_databuf, |
606 | bd_le.le_list); | |
d7b616e2 SW |
607 | while(total) { |
608 | num = total; | |
18ec7d5c SW |
609 | if (num > limit) |
610 | num = limit; | |
d7b616e2 SW |
611 | |
612 | gfs2_log_unlock(sdp); | |
613 | bh = gfs2_log_get_buf(sdp); | |
614 | gfs2_log_lock(sdp); | |
615 | ||
616 | ld = (struct gfs2_log_descriptor *)bh->b_data; | |
617 | ptr = (__be64 *)(bh->b_data + DATABUF_OFFSET); | |
618 | ld->ld_header.mh_magic = cpu_to_be32(GFS2_MAGIC); | |
619 | ld->ld_header.mh_type = cpu_to_be32(GFS2_METATYPE_LD); | |
620 | ld->ld_header.mh_format = cpu_to_be32(GFS2_FORMAT_LD); | |
621 | ld->ld_type = cpu_to_be32(GFS2_LOG_DESC_JDATA); | |
622 | ld->ld_length = cpu_to_be32(num + 1); | |
623 | ld->ld_data1 = cpu_to_be32(num); | |
624 | ld->ld_data2 = cpu_to_be32(0); | |
625 | memset(ld->ld_reserved, 0, sizeof(ld->ld_reserved)); | |
626 | ||
18ec7d5c | 627 | n = 0; |
d7b616e2 SW |
628 | list_for_each_entry_continue(bd1, &sdp->sd_log_le_databuf, |
629 | bd_le.le_list) { | |
70209331 RC |
630 | bh1 = bd1->bd_bh; |
631 | ||
d7b616e2 SW |
632 | magic = gfs2_check_magic(bh1); |
633 | *ptr++ = cpu_to_be64(bh1->b_blocknr); | |
634 | *ptr++ = cpu_to_be64((__u64)magic); | |
635 | clear_buffer_escaped(bh1); | |
636 | if (unlikely(magic != 0)) | |
637 | set_buffer_escaped(bh1); | |
638 | if (++n >= num) | |
639 | break; | |
18ec7d5c | 640 | } |
f55ab26a | 641 | gfs2_log_unlock(sdp); |
b3b94faa | 642 | if (bh) { |
18ec7d5c SW |
643 | set_buffer_dirty(bh); |
644 | ll_rw_block(WRITE, 1, &bh); | |
645 | bh = NULL; | |
905d2aef | 646 | ptr = NULL; |
18ec7d5c SW |
647 | } |
648 | n = 0; | |
f55ab26a | 649 | gfs2_log_lock(sdp); |
568f4c96 SW |
650 | list_for_each_entry_continue(bd2, &sdp->sd_log_le_databuf, |
651 | bd_le.le_list) { | |
18ec7d5c SW |
652 | if (!bd2->bd_bh) |
653 | continue; | |
654 | /* copy buffer if it needs escaping */ | |
f55ab26a | 655 | gfs2_log_unlock(sdp); |
18ec7d5c SW |
656 | if (unlikely(buffer_escaped(bd2->bd_bh))) { |
657 | void *kaddr; | |
658 | struct page *page = bd2->bd_bh->b_page; | |
659 | bh = gfs2_log_get_buf(sdp); | |
660 | kaddr = kmap_atomic(page, KM_USER0); | |
568f4c96 SW |
661 | memcpy(bh->b_data, |
662 | kaddr + bh_offset(bd2->bd_bh), | |
663 | sdp->sd_sb.sb_bsize); | |
c312c4fd | 664 | kunmap_atomic(kaddr, KM_USER0); |
18ec7d5c SW |
665 | *(__be32 *)bh->b_data = 0; |
666 | } else { | |
667 | bh = gfs2_log_fake_buf(sdp, bd2->bd_bh); | |
b3b94faa | 668 | } |
18ec7d5c SW |
669 | set_buffer_dirty(bh); |
670 | ll_rw_block(WRITE, 1, &bh); | |
f55ab26a | 671 | gfs2_log_lock(sdp); |
18ec7d5c SW |
672 | if (++n >= num) |
673 | break; | |
674 | } | |
675 | bh = NULL; | |
d7b616e2 SW |
676 | BUG_ON(total < num); |
677 | total -= num; | |
b3b94faa | 678 | } |
f55ab26a | 679 | gfs2_log_unlock(sdp); |
18ec7d5c SW |
680 | } |
681 | ||
682 | static int databuf_lo_scan_elements(struct gfs2_jdesc *jd, unsigned int start, | |
683 | struct gfs2_log_descriptor *ld, | |
684 | __be64 *ptr, int pass) | |
685 | { | |
feaa7bba SW |
686 | struct gfs2_inode *ip = GFS2_I(jd->jd_inode); |
687 | struct gfs2_sbd *sdp = GFS2_SB(jd->jd_inode); | |
5c676f6d | 688 | struct gfs2_glock *gl = ip->i_gl; |
18ec7d5c SW |
689 | unsigned int blks = be32_to_cpu(ld->ld_data1); |
690 | struct buffer_head *bh_log, *bh_ip; | |
cd915493 SW |
691 | u64 blkno; |
692 | u64 esc; | |
18ec7d5c SW |
693 | int error = 0; |
694 | ||
695 | if (pass != 1 || be32_to_cpu(ld->ld_type) != GFS2_LOG_DESC_JDATA) | |
696 | return 0; | |
697 | ||
698 | gfs2_replay_incr_blk(sdp, &start); | |
699 | for (; blks; gfs2_replay_incr_blk(sdp, &start), blks--) { | |
700 | blkno = be64_to_cpu(*ptr++); | |
701 | esc = be64_to_cpu(*ptr++); | |
702 | ||
703 | sdp->sd_found_blocks++; | |
704 | ||
705 | if (gfs2_revoke_check(sdp, blkno, start)) | |
706 | continue; | |
707 | ||
708 | error = gfs2_replay_read_block(jd, start, &bh_log); | |
709 | if (error) | |
710 | return error; | |
711 | ||
712 | bh_ip = gfs2_meta_new(gl, blkno); | |
713 | memcpy(bh_ip->b_data, bh_log->b_data, bh_log->b_size); | |
714 | ||
715 | /* Unescape */ | |
716 | if (esc) { | |
717 | __be32 *eptr = (__be32 *)bh_ip->b_data; | |
718 | *eptr = cpu_to_be32(GFS2_MAGIC); | |
719 | } | |
720 | mark_buffer_dirty(bh_ip); | |
721 | ||
722 | brelse(bh_log); | |
723 | brelse(bh_ip); | |
724 | if (error) | |
725 | break; | |
726 | ||
727 | sdp->sd_replayed_blocks++; | |
728 | } | |
729 | ||
730 | return error; | |
731 | } | |
732 | ||
733 | /* FIXME: sort out accounting for log blocks etc. */ | |
734 | ||
735 | static void databuf_lo_after_scan(struct gfs2_jdesc *jd, int error, int pass) | |
736 | { | |
feaa7bba SW |
737 | struct gfs2_inode *ip = GFS2_I(jd->jd_inode); |
738 | struct gfs2_sbd *sdp = GFS2_SB(jd->jd_inode); | |
18ec7d5c SW |
739 | |
740 | if (error) { | |
7276b3b0 | 741 | gfs2_meta_sync(ip->i_gl); |
18ec7d5c SW |
742 | return; |
743 | } | |
744 | if (pass != 1) | |
745 | return; | |
746 | ||
747 | /* data sync? */ | |
7276b3b0 | 748 | gfs2_meta_sync(ip->i_gl); |
18ec7d5c SW |
749 | |
750 | fs_info(sdp, "jid=%u: Replayed %u of %u data blocks\n", | |
751 | jd->jd_jid, sdp->sd_replayed_blocks, sdp->sd_found_blocks); | |
752 | } | |
753 | ||
754 | static void databuf_lo_after_commit(struct gfs2_sbd *sdp, struct gfs2_ail *ai) | |
755 | { | |
756 | struct list_head *head = &sdp->sd_log_le_databuf; | |
757 | struct gfs2_bufdata *bd; | |
758 | ||
759 | while (!list_empty(head)) { | |
760 | bd = list_entry(head->next, struct gfs2_bufdata, bd_le.le_list); | |
b8e1aabf | 761 | list_del_init(&bd->bd_le.le_list); |
18ec7d5c | 762 | sdp->sd_log_num_databuf--; |
18ec7d5c | 763 | gfs2_unpin(sdp, bd->bd_bh, ai); |
18ec7d5c | 764 | } |
b3b94faa DT |
765 | gfs2_assert_warn(sdp, !sdp->sd_log_num_databuf); |
766 | } | |
767 | ||
18ec7d5c | 768 | |
b09e593d | 769 | const struct gfs2_log_operations gfs2_glock_lops = { |
b3b94faa DT |
770 | .lo_add = glock_lo_add, |
771 | .lo_after_commit = glock_lo_after_commit, | |
ea67eedb | 772 | .lo_name = "glock", |
b3b94faa DT |
773 | }; |
774 | ||
b09e593d | 775 | const struct gfs2_log_operations gfs2_buf_lops = { |
b3b94faa DT |
776 | .lo_add = buf_lo_add, |
777 | .lo_incore_commit = buf_lo_incore_commit, | |
778 | .lo_before_commit = buf_lo_before_commit, | |
779 | .lo_after_commit = buf_lo_after_commit, | |
780 | .lo_before_scan = buf_lo_before_scan, | |
781 | .lo_scan_elements = buf_lo_scan_elements, | |
782 | .lo_after_scan = buf_lo_after_scan, | |
ea67eedb | 783 | .lo_name = "buf", |
b3b94faa DT |
784 | }; |
785 | ||
b09e593d | 786 | const struct gfs2_log_operations gfs2_revoke_lops = { |
b3b94faa DT |
787 | .lo_add = revoke_lo_add, |
788 | .lo_before_commit = revoke_lo_before_commit, | |
789 | .lo_before_scan = revoke_lo_before_scan, | |
790 | .lo_scan_elements = revoke_lo_scan_elements, | |
791 | .lo_after_scan = revoke_lo_after_scan, | |
ea67eedb | 792 | .lo_name = "revoke", |
b3b94faa DT |
793 | }; |
794 | ||
b09e593d | 795 | const struct gfs2_log_operations gfs2_rg_lops = { |
b3b94faa DT |
796 | .lo_add = rg_lo_add, |
797 | .lo_after_commit = rg_lo_after_commit, | |
ea67eedb | 798 | .lo_name = "rg", |
b3b94faa DT |
799 | }; |
800 | ||
b09e593d | 801 | const struct gfs2_log_operations gfs2_databuf_lops = { |
b3b94faa | 802 | .lo_add = databuf_lo_add, |
18ec7d5c | 803 | .lo_incore_commit = buf_lo_incore_commit, |
b3b94faa | 804 | .lo_before_commit = databuf_lo_before_commit, |
18ec7d5c SW |
805 | .lo_after_commit = databuf_lo_after_commit, |
806 | .lo_scan_elements = databuf_lo_scan_elements, | |
807 | .lo_after_scan = databuf_lo_after_scan, | |
ea67eedb | 808 | .lo_name = "databuf", |
b3b94faa DT |
809 | }; |
810 | ||
b09e593d | 811 | const struct gfs2_log_operations *gfs2_log_ops[] = { |
b3b94faa DT |
812 | &gfs2_glock_lops, |
813 | &gfs2_buf_lops, | |
814 | &gfs2_revoke_lops, | |
815 | &gfs2_rg_lops, | |
816 | &gfs2_databuf_lops, | |
ea67eedb | 817 | NULL, |
b3b94faa DT |
818 | }; |
819 |