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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> | |
75ca61c1 | 15 | #include <linux/mempool.h> |
5c676f6d | 16 | #include <linux/gfs2_ondisk.h> |
c969f58c SW |
17 | #include <linux/bio.h> |
18 | #include <linux/fs.h> | |
7f63257d | 19 | #include <linux/list_sort.h> |
b3b94faa DT |
20 | |
21 | #include "gfs2.h" | |
5c676f6d | 22 | #include "incore.h" |
2332c443 | 23 | #include "inode.h" |
b3b94faa DT |
24 | #include "glock.h" |
25 | #include "log.h" | |
26 | #include "lops.h" | |
27 | #include "meta_io.h" | |
28 | #include "recovery.h" | |
29 | #include "rgrp.h" | |
30 | #include "trans.h" | |
5c676f6d | 31 | #include "util.h" |
63997775 | 32 | #include "trace_gfs2.h" |
b3b94faa | 33 | |
9b9107a5 SW |
34 | /** |
35 | * gfs2_pin - Pin a buffer in memory | |
36 | * @sdp: The superblock | |
37 | * @bh: The buffer to be pinned | |
38 | * | |
39 | * The log lock must be held when calling this function | |
40 | */ | |
767f433f | 41 | void gfs2_pin(struct gfs2_sbd *sdp, struct buffer_head *bh) |
9b9107a5 SW |
42 | { |
43 | struct gfs2_bufdata *bd; | |
44 | ||
29687a2a | 45 | BUG_ON(!current->journal_info); |
9b9107a5 SW |
46 | |
47 | clear_buffer_dirty(bh); | |
48 | if (test_set_buffer_pinned(bh)) | |
49 | gfs2_assert_withdraw(sdp, 0); | |
50 | if (!buffer_uptodate(bh)) | |
51 | gfs2_io_error_bh(sdp, bh); | |
52 | bd = bh->b_private; | |
53 | /* If this buffer is in the AIL and it has already been written | |
54 | * to in-place disk block, remove it from the AIL. | |
55 | */ | |
c618e87a | 56 | spin_lock(&sdp->sd_ail_lock); |
16ca9412 BM |
57 | if (bd->bd_tr) |
58 | list_move(&bd->bd_ail_st_list, &bd->bd_tr->tr_ail2_list); | |
c618e87a | 59 | spin_unlock(&sdp->sd_ail_lock); |
9b9107a5 | 60 | get_bh(bh); |
5e687eac | 61 | atomic_inc(&sdp->sd_log_pinned); |
63997775 | 62 | trace_gfs2_pin(bd, 1); |
9b9107a5 SW |
63 | } |
64 | ||
7c9ca621 BP |
65 | static bool buffer_is_rgrp(const struct gfs2_bufdata *bd) |
66 | { | |
67 | return bd->bd_gl->gl_name.ln_type == LM_TYPE_RGRP; | |
68 | } | |
69 | ||
70 | static void maybe_release_space(struct gfs2_bufdata *bd) | |
71 | { | |
72 | struct gfs2_glock *gl = bd->bd_gl; | |
73 | struct gfs2_sbd *sdp = gl->gl_sbd; | |
74 | struct gfs2_rgrpd *rgd = gl->gl_object; | |
75 | unsigned int index = bd->bd_bh->b_blocknr - gl->gl_name.ln_number; | |
76 | struct gfs2_bitmap *bi = rgd->rd_bits + index; | |
77 | ||
78 | if (bi->bi_clone == 0) | |
79 | return; | |
80 | if (sdp->sd_args.ar_discard) | |
66fc061b | 81 | gfs2_rgrp_send_discards(sdp, rgd->rd_data0, bd->bd_bh, bi, 1, NULL); |
7c9ca621 BP |
82 | memcpy(bi->bi_clone + bi->bi_offset, |
83 | bd->bd_bh->b_data + bi->bi_offset, bi->bi_len); | |
84 | clear_bit(GBF_FULL, &bi->bi_flags); | |
85 | rgd->rd_free_clone = rgd->rd_free; | |
5ea5050c | 86 | rgd->rd_extfail_pt = rgd->rd_free; |
7c9ca621 BP |
87 | } |
88 | ||
9b9107a5 SW |
89 | /** |
90 | * gfs2_unpin - Unpin a buffer | |
91 | * @sdp: the filesystem the buffer belongs to | |
92 | * @bh: The buffer to unpin | |
93 | * @ai: | |
29687a2a | 94 | * @flags: The inode dirty flags |
9b9107a5 SW |
95 | * |
96 | */ | |
97 | ||
98 | static void gfs2_unpin(struct gfs2_sbd *sdp, struct buffer_head *bh, | |
16ca9412 | 99 | struct gfs2_trans *tr) |
9b9107a5 SW |
100 | { |
101 | struct gfs2_bufdata *bd = bh->b_private; | |
102 | ||
29687a2a SW |
103 | BUG_ON(!buffer_uptodate(bh)); |
104 | BUG_ON(!buffer_pinned(bh)); | |
9b9107a5 SW |
105 | |
106 | lock_buffer(bh); | |
107 | mark_buffer_dirty(bh); | |
108 | clear_buffer_pinned(bh); | |
109 | ||
7c9ca621 BP |
110 | if (buffer_is_rgrp(bd)) |
111 | maybe_release_space(bd); | |
112 | ||
d6a079e8 | 113 | spin_lock(&sdp->sd_ail_lock); |
16ca9412 | 114 | if (bd->bd_tr) { |
9b9107a5 SW |
115 | list_del(&bd->bd_ail_st_list); |
116 | brelse(bh); | |
117 | } else { | |
118 | struct gfs2_glock *gl = bd->bd_gl; | |
119 | list_add(&bd->bd_ail_gl_list, &gl->gl_ail_list); | |
120 | atomic_inc(&gl->gl_ail_count); | |
121 | } | |
16ca9412 BM |
122 | bd->bd_tr = tr; |
123 | list_add(&bd->bd_ail_st_list, &tr->tr_ail1_list); | |
d6a079e8 DC |
124 | spin_unlock(&sdp->sd_ail_lock); |
125 | ||
29687a2a | 126 | clear_bit(GLF_LFLUSH, &bd->bd_gl->gl_flags); |
63997775 | 127 | trace_gfs2_pin(bd, 0); |
9b9107a5 | 128 | unlock_buffer(bh); |
5e687eac | 129 | atomic_dec(&sdp->sd_log_pinned); |
9b9107a5 SW |
130 | } |
131 | ||
e8c92ed7 | 132 | static void gfs2_log_incr_head(struct gfs2_sbd *sdp) |
16615be1 | 133 | { |
e8c92ed7 SW |
134 | BUG_ON((sdp->sd_log_flush_head == sdp->sd_log_tail) && |
135 | (sdp->sd_log_flush_head != sdp->sd_log_head)); | |
136 | ||
137 | if (++sdp->sd_log_flush_head == sdp->sd_jdesc->jd_blocks) { | |
138 | sdp->sd_log_flush_head = 0; | |
139 | sdp->sd_log_flush_wrapped = 1; | |
140 | } | |
16615be1 SW |
141 | } |
142 | ||
e8c92ed7 | 143 | static u64 gfs2_log_bmap(struct gfs2_sbd *sdp) |
16615be1 | 144 | { |
e8c92ed7 SW |
145 | unsigned int lbn = sdp->sd_log_flush_head; |
146 | struct gfs2_journal_extent *je; | |
147 | u64 block; | |
148 | ||
149 | list_for_each_entry(je, &sdp->sd_jdesc->extent_list, extent_list) { | |
150 | if (lbn >= je->lblock && lbn < je->lblock + je->blocks) { | |
151 | block = je->dblock + lbn - je->lblock; | |
152 | gfs2_log_incr_head(sdp); | |
153 | return block; | |
154 | } | |
155 | } | |
156 | ||
157 | return -1; | |
16615be1 SW |
158 | } |
159 | ||
e8c92ed7 SW |
160 | /** |
161 | * gfs2_end_log_write_bh - end log write of pagecache data with buffers | |
162 | * @sdp: The superblock | |
163 | * @bvec: The bio_vec | |
164 | * @error: The i/o status | |
165 | * | |
166 | * This finds the relavent buffers and unlocks then and sets the | |
167 | * error flag according to the status of the i/o request. This is | |
168 | * used when the log is writing data which has an in-place version | |
169 | * that is pinned in the pagecache. | |
170 | */ | |
171 | ||
172 | static void gfs2_end_log_write_bh(struct gfs2_sbd *sdp, struct bio_vec *bvec, | |
173 | int error) | |
16615be1 | 174 | { |
e8c92ed7 SW |
175 | struct buffer_head *bh, *next; |
176 | struct page *page = bvec->bv_page; | |
177 | unsigned size; | |
178 | ||
179 | bh = page_buffers(page); | |
180 | size = bvec->bv_len; | |
181 | while (bh_offset(bh) < bvec->bv_offset) | |
182 | bh = bh->b_this_page; | |
183 | do { | |
184 | if (error) | |
185 | set_buffer_write_io_error(bh); | |
186 | unlock_buffer(bh); | |
187 | next = bh->b_this_page; | |
188 | size -= bh->b_size; | |
189 | brelse(bh); | |
190 | bh = next; | |
191 | } while(bh && size); | |
16615be1 SW |
192 | } |
193 | ||
47ac5537 | 194 | /** |
e8c92ed7 SW |
195 | * gfs2_end_log_write - end of i/o to the log |
196 | * @bio: The bio | |
197 | * @error: Status of i/o request | |
198 | * | |
199 | * Each bio_vec contains either data from the pagecache or data | |
200 | * relating to the log itself. Here we iterate over the bio_vec | |
201 | * array, processing both kinds of data. | |
47ac5537 SW |
202 | * |
203 | */ | |
204 | ||
e8c92ed7 | 205 | static void gfs2_end_log_write(struct bio *bio, int error) |
47ac5537 | 206 | { |
e8c92ed7 SW |
207 | struct gfs2_sbd *sdp = bio->bi_private; |
208 | struct bio_vec *bvec; | |
209 | struct page *page; | |
210 | int i; | |
211 | ||
212 | if (error) { | |
213 | sdp->sd_log_error = error; | |
214 | fs_err(sdp, "Error %d writing to log\n", error); | |
215 | } | |
216 | ||
e97e548b | 217 | bio_for_each_segment_all(bvec, bio, i) { |
e8c92ed7 SW |
218 | page = bvec->bv_page; |
219 | if (page_has_buffers(page)) | |
220 | gfs2_end_log_write_bh(sdp, bvec, error); | |
221 | else | |
222 | mempool_free(page, gfs2_page_pool); | |
223 | } | |
47ac5537 | 224 | |
e8c92ed7 | 225 | bio_put(bio); |
47ac5537 SW |
226 | if (atomic_dec_and_test(&sdp->sd_log_in_flight)) |
227 | wake_up(&sdp->sd_log_flush_wait); | |
228 | } | |
229 | ||
230 | /** | |
e8c92ed7 SW |
231 | * gfs2_log_flush_bio - Submit any pending log bio |
232 | * @sdp: The superblock | |
233 | * @rw: The rw flags | |
47ac5537 | 234 | * |
e8c92ed7 SW |
235 | * Submit any pending part-built or full bio to the block device. If |
236 | * there is no pending bio, then this is a no-op. | |
47ac5537 SW |
237 | */ |
238 | ||
e8c92ed7 | 239 | void gfs2_log_flush_bio(struct gfs2_sbd *sdp, int rw) |
47ac5537 | 240 | { |
e8c92ed7 SW |
241 | if (sdp->sd_log_bio) { |
242 | atomic_inc(&sdp->sd_log_in_flight); | |
243 | submit_bio(rw, sdp->sd_log_bio); | |
244 | sdp->sd_log_bio = NULL; | |
245 | } | |
246 | } | |
47ac5537 | 247 | |
e8c92ed7 SW |
248 | /** |
249 | * gfs2_log_alloc_bio - Allocate a new bio for log writing | |
250 | * @sdp: The superblock | |
251 | * @blkno: The next device block number we want to write to | |
252 | * | |
253 | * This should never be called when there is a cached bio in the | |
254 | * super block. When it returns, there will be a cached bio in the | |
255 | * super block which will have as many bio_vecs as the device is | |
256 | * happy to handle. | |
257 | * | |
258 | * Returns: Newly allocated bio | |
259 | */ | |
260 | ||
261 | static struct bio *gfs2_log_alloc_bio(struct gfs2_sbd *sdp, u64 blkno) | |
262 | { | |
263 | struct super_block *sb = sdp->sd_vfs; | |
264 | unsigned nrvecs = bio_get_nr_vecs(sb->s_bdev); | |
265 | struct bio *bio; | |
266 | ||
267 | BUG_ON(sdp->sd_log_bio); | |
268 | ||
269 | while (1) { | |
270 | bio = bio_alloc(GFP_NOIO, nrvecs); | |
271 | if (likely(bio)) | |
272 | break; | |
273 | nrvecs = max(nrvecs/2, 1U); | |
274 | } | |
47ac5537 | 275 | |
4f024f37 | 276 | bio->bi_iter.bi_sector = blkno * (sb->s_blocksize >> 9); |
e8c92ed7 SW |
277 | bio->bi_bdev = sb->s_bdev; |
278 | bio->bi_end_io = gfs2_end_log_write; | |
279 | bio->bi_private = sdp; | |
280 | ||
281 | sdp->sd_log_bio = bio; | |
282 | ||
283 | return bio; | |
47ac5537 SW |
284 | } |
285 | ||
286 | /** | |
e8c92ed7 SW |
287 | * gfs2_log_get_bio - Get cached log bio, or allocate a new one |
288 | * @sdp: The superblock | |
289 | * @blkno: The device block number we want to write to | |
290 | * | |
291 | * If there is a cached bio, then if the next block number is sequential | |
292 | * with the previous one, return it, otherwise flush the bio to the | |
293 | * device. If there is not a cached bio, or we just flushed it, then | |
294 | * allocate a new one. | |
47ac5537 | 295 | * |
e8c92ed7 | 296 | * Returns: The bio to use for log writes |
47ac5537 SW |
297 | */ |
298 | ||
e8c92ed7 | 299 | static struct bio *gfs2_log_get_bio(struct gfs2_sbd *sdp, u64 blkno) |
47ac5537 | 300 | { |
e8c92ed7 SW |
301 | struct bio *bio = sdp->sd_log_bio; |
302 | u64 nblk; | |
303 | ||
304 | if (bio) { | |
f73a1c7d | 305 | nblk = bio_end_sector(bio); |
e8c92ed7 SW |
306 | nblk >>= sdp->sd_fsb2bb_shift; |
307 | if (blkno == nblk) | |
308 | return bio; | |
309 | gfs2_log_flush_bio(sdp, WRITE); | |
310 | } | |
311 | ||
312 | return gfs2_log_alloc_bio(sdp, blkno); | |
47ac5537 SW |
313 | } |
314 | ||
e8c92ed7 | 315 | |
47ac5537 | 316 | /** |
e8c92ed7 | 317 | * gfs2_log_write - write to log |
47ac5537 | 318 | * @sdp: the filesystem |
e8c92ed7 SW |
319 | * @page: the page to write |
320 | * @size: the size of the data to write | |
321 | * @offset: the offset within the page | |
47ac5537 | 322 | * |
e8c92ed7 SW |
323 | * Try and add the page segment to the current bio. If that fails, |
324 | * submit the current bio to the device and create a new one, and | |
325 | * then add the page segment to that. | |
47ac5537 SW |
326 | */ |
327 | ||
e8c92ed7 SW |
328 | static void gfs2_log_write(struct gfs2_sbd *sdp, struct page *page, |
329 | unsigned size, unsigned offset) | |
47ac5537 | 330 | { |
e8c92ed7 SW |
331 | u64 blkno = gfs2_log_bmap(sdp); |
332 | struct bio *bio; | |
333 | int ret; | |
334 | ||
335 | bio = gfs2_log_get_bio(sdp, blkno); | |
336 | ret = bio_add_page(bio, page, size, offset); | |
337 | if (ret == 0) { | |
338 | gfs2_log_flush_bio(sdp, WRITE); | |
339 | bio = gfs2_log_alloc_bio(sdp, blkno); | |
340 | ret = bio_add_page(bio, page, size, offset); | |
341 | WARN_ON(ret == 0); | |
342 | } | |
343 | } | |
47ac5537 | 344 | |
e8c92ed7 SW |
345 | /** |
346 | * gfs2_log_write_bh - write a buffer's content to the log | |
347 | * @sdp: The super block | |
348 | * @bh: The buffer pointing to the in-place location | |
349 | * | |
350 | * This writes the content of the buffer to the next available location | |
351 | * in the log. The buffer will be unlocked once the i/o to the log has | |
352 | * completed. | |
353 | */ | |
354 | ||
355 | static void gfs2_log_write_bh(struct gfs2_sbd *sdp, struct buffer_head *bh) | |
356 | { | |
357 | gfs2_log_write(sdp, bh->b_page, bh->b_size, bh_offset(bh)); | |
358 | } | |
47ac5537 | 359 | |
e8c92ed7 SW |
360 | /** |
361 | * gfs2_log_write_page - write one block stored in a page, into the log | |
362 | * @sdp: The superblock | |
363 | * @page: The struct page | |
364 | * | |
365 | * This writes the first block-sized part of the page into the log. Note | |
366 | * that the page must have been allocated from the gfs2_page_pool mempool | |
367 | * and that after this has been called, ownership has been transferred and | |
368 | * the page may be freed at any time. | |
369 | */ | |
47ac5537 | 370 | |
e8c92ed7 SW |
371 | void gfs2_log_write_page(struct gfs2_sbd *sdp, struct page *page) |
372 | { | |
373 | struct super_block *sb = sdp->sd_vfs; | |
374 | gfs2_log_write(sdp, page, sb->s_blocksize, 0); | |
47ac5537 | 375 | } |
16615be1 | 376 | |
dad30e90 SW |
377 | static struct page *gfs2_get_log_desc(struct gfs2_sbd *sdp, u32 ld_type, |
378 | u32 ld_length, u32 ld_data1) | |
16615be1 | 379 | { |
144a4c2f | 380 | struct page *page = mempool_alloc(gfs2_page_pool, GFP_NOIO); |
e8c92ed7 SW |
381 | struct gfs2_log_descriptor *ld = page_address(page); |
382 | clear_page(ld); | |
16615be1 SW |
383 | ld->ld_header.mh_magic = cpu_to_be32(GFS2_MAGIC); |
384 | ld->ld_header.mh_type = cpu_to_be32(GFS2_METATYPE_LD); | |
385 | ld->ld_header.mh_format = cpu_to_be32(GFS2_FORMAT_LD); | |
386 | ld->ld_type = cpu_to_be32(ld_type); | |
dad30e90 SW |
387 | ld->ld_length = cpu_to_be32(ld_length); |
388 | ld->ld_data1 = cpu_to_be32(ld_data1); | |
16615be1 | 389 | ld->ld_data2 = 0; |
e8c92ed7 | 390 | return page; |
16615be1 SW |
391 | } |
392 | ||
dad30e90 SW |
393 | static void gfs2_check_magic(struct buffer_head *bh) |
394 | { | |
395 | void *kaddr; | |
396 | __be32 *ptr; | |
397 | ||
398 | clear_buffer_escaped(bh); | |
399 | kaddr = kmap_atomic(bh->b_page); | |
400 | ptr = kaddr + bh_offset(bh); | |
401 | if (*ptr == cpu_to_be32(GFS2_MAGIC)) | |
402 | set_buffer_escaped(bh); | |
403 | kunmap_atomic(kaddr); | |
404 | } | |
405 | ||
7f63257d BM |
406 | static int blocknr_cmp(void *priv, struct list_head *a, struct list_head *b) |
407 | { | |
408 | struct gfs2_bufdata *bda, *bdb; | |
409 | ||
410 | bda = list_entry(a, struct gfs2_bufdata, bd_list); | |
411 | bdb = list_entry(b, struct gfs2_bufdata, bd_list); | |
412 | ||
413 | if (bda->bd_bh->b_blocknr < bdb->bd_bh->b_blocknr) | |
414 | return -1; | |
415 | if (bda->bd_bh->b_blocknr > bdb->bd_bh->b_blocknr) | |
416 | return 1; | |
417 | return 0; | |
418 | } | |
419 | ||
dad30e90 SW |
420 | static void gfs2_before_commit(struct gfs2_sbd *sdp, unsigned int limit, |
421 | unsigned int total, struct list_head *blist, | |
422 | bool is_databuf) | |
b3b94faa | 423 | { |
b3b94faa DT |
424 | struct gfs2_log_descriptor *ld; |
425 | struct gfs2_bufdata *bd1 = NULL, *bd2; | |
e8c92ed7 | 426 | struct page *page; |
b3b94faa DT |
427 | unsigned int num; |
428 | unsigned n; | |
429 | __be64 *ptr; | |
430 | ||
905d2aef | 431 | gfs2_log_lock(sdp); |
7f63257d | 432 | list_sort(NULL, blist, blocknr_cmp); |
c0752aa7 | 433 | bd1 = bd2 = list_prepare_entry(bd1, blist, bd_list); |
b3b94faa DT |
434 | while(total) { |
435 | num = total; | |
436 | if (total > limit) | |
437 | num = limit; | |
905d2aef | 438 | gfs2_log_unlock(sdp); |
4a586812 BP |
439 | page = gfs2_get_log_desc(sdp, |
440 | is_databuf ? GFS2_LOG_DESC_JDATA : | |
441 | GFS2_LOG_DESC_METADATA, num + 1, num); | |
e8c92ed7 | 442 | ld = page_address(page); |
905d2aef | 443 | gfs2_log_lock(sdp); |
e8c92ed7 | 444 | ptr = (__be64 *)(ld + 1); |
b3b94faa DT |
445 | |
446 | n = 0; | |
c0752aa7 | 447 | list_for_each_entry_continue(bd1, blist, bd_list) { |
b3b94faa | 448 | *ptr++ = cpu_to_be64(bd1->bd_bh->b_blocknr); |
dad30e90 SW |
449 | if (is_databuf) { |
450 | gfs2_check_magic(bd1->bd_bh); | |
451 | *ptr++ = cpu_to_be64(buffer_escaped(bd1->bd_bh) ? 1 : 0); | |
452 | } | |
b3b94faa DT |
453 | if (++n >= num) |
454 | break; | |
455 | } | |
456 | ||
905d2aef | 457 | gfs2_log_unlock(sdp); |
e8c92ed7 | 458 | gfs2_log_write_page(sdp, page); |
905d2aef | 459 | gfs2_log_lock(sdp); |
b3b94faa DT |
460 | |
461 | n = 0; | |
c0752aa7 | 462 | list_for_each_entry_continue(bd2, blist, bd_list) { |
16615be1 | 463 | get_bh(bd2->bd_bh); |
905d2aef | 464 | gfs2_log_unlock(sdp); |
16615be1 | 465 | lock_buffer(bd2->bd_bh); |
dad30e90 SW |
466 | |
467 | if (buffer_escaped(bd2->bd_bh)) { | |
468 | void *kaddr; | |
469 | page = mempool_alloc(gfs2_page_pool, GFP_NOIO); | |
470 | ptr = page_address(page); | |
471 | kaddr = kmap_atomic(bd2->bd_bh->b_page); | |
472 | memcpy(ptr, kaddr + bh_offset(bd2->bd_bh), | |
473 | bd2->bd_bh->b_size); | |
474 | kunmap_atomic(kaddr); | |
475 | *(__be32 *)ptr = 0; | |
476 | clear_buffer_escaped(bd2->bd_bh); | |
477 | unlock_buffer(bd2->bd_bh); | |
478 | brelse(bd2->bd_bh); | |
479 | gfs2_log_write_page(sdp, page); | |
480 | } else { | |
481 | gfs2_log_write_bh(sdp, bd2->bd_bh); | |
482 | } | |
905d2aef | 483 | gfs2_log_lock(sdp); |
b3b94faa DT |
484 | if (++n >= num) |
485 | break; | |
486 | } | |
487 | ||
905d2aef | 488 | BUG_ON(total < num); |
b3b94faa DT |
489 | total -= num; |
490 | } | |
905d2aef | 491 | gfs2_log_unlock(sdp); |
b3b94faa DT |
492 | } |
493 | ||
dad30e90 SW |
494 | static void buf_lo_before_commit(struct gfs2_sbd *sdp) |
495 | { | |
496 | unsigned int limit = buf_limit(sdp); /* 503 for 4k blocks */ | |
497 | ||
498 | gfs2_before_commit(sdp, limit, sdp->sd_log_num_buf, | |
499 | &sdp->sd_log_le_buf, 0); | |
500 | } | |
501 | ||
16ca9412 | 502 | static void buf_lo_after_commit(struct gfs2_sbd *sdp, struct gfs2_trans *tr) |
b3b94faa DT |
503 | { |
504 | struct list_head *head = &sdp->sd_log_le_buf; | |
505 | struct gfs2_bufdata *bd; | |
506 | ||
16ca9412 BM |
507 | if (tr == NULL) { |
508 | gfs2_assert(sdp, list_empty(head)); | |
509 | return; | |
510 | } | |
511 | ||
b3b94faa | 512 | while (!list_empty(head)) { |
c0752aa7 BP |
513 | bd = list_entry(head->next, struct gfs2_bufdata, bd_list); |
514 | list_del_init(&bd->bd_list); | |
b3b94faa DT |
515 | sdp->sd_log_num_buf--; |
516 | ||
16ca9412 | 517 | gfs2_unpin(sdp, bd->bd_bh, tr); |
b3b94faa DT |
518 | } |
519 | gfs2_assert_warn(sdp, !sdp->sd_log_num_buf); | |
520 | } | |
521 | ||
522 | static void buf_lo_before_scan(struct gfs2_jdesc *jd, | |
55167622 | 523 | struct gfs2_log_header_host *head, int pass) |
b3b94faa | 524 | { |
feaa7bba | 525 | struct gfs2_sbd *sdp = GFS2_SB(jd->jd_inode); |
b3b94faa DT |
526 | |
527 | if (pass != 0) | |
528 | return; | |
529 | ||
530 | sdp->sd_found_blocks = 0; | |
531 | sdp->sd_replayed_blocks = 0; | |
532 | } | |
533 | ||
534 | static int buf_lo_scan_elements(struct gfs2_jdesc *jd, unsigned int start, | |
535 | struct gfs2_log_descriptor *ld, __be64 *ptr, | |
536 | int pass) | |
537 | { | |
feaa7bba SW |
538 | struct gfs2_inode *ip = GFS2_I(jd->jd_inode); |
539 | struct gfs2_sbd *sdp = GFS2_SB(jd->jd_inode); | |
5c676f6d | 540 | struct gfs2_glock *gl = ip->i_gl; |
b3b94faa DT |
541 | unsigned int blks = be32_to_cpu(ld->ld_data1); |
542 | struct buffer_head *bh_log, *bh_ip; | |
cd915493 | 543 | u64 blkno; |
b3b94faa DT |
544 | int error = 0; |
545 | ||
546 | if (pass != 1 || be32_to_cpu(ld->ld_type) != GFS2_LOG_DESC_METADATA) | |
547 | return 0; | |
548 | ||
549 | gfs2_replay_incr_blk(sdp, &start); | |
550 | ||
551 | for (; blks; gfs2_replay_incr_blk(sdp, &start), blks--) { | |
552 | blkno = be64_to_cpu(*ptr++); | |
553 | ||
554 | sdp->sd_found_blocks++; | |
555 | ||
556 | if (gfs2_revoke_check(sdp, blkno, start)) | |
557 | continue; | |
558 | ||
559 | error = gfs2_replay_read_block(jd, start, &bh_log); | |
82ffa516 SW |
560 | if (error) |
561 | return error; | |
b3b94faa DT |
562 | |
563 | bh_ip = gfs2_meta_new(gl, blkno); | |
564 | memcpy(bh_ip->b_data, bh_log->b_data, bh_log->b_size); | |
565 | ||
566 | if (gfs2_meta_check(sdp, bh_ip)) | |
567 | error = -EIO; | |
568 | else | |
569 | mark_buffer_dirty(bh_ip); | |
570 | ||
571 | brelse(bh_log); | |
572 | brelse(bh_ip); | |
573 | ||
574 | if (error) | |
575 | break; | |
576 | ||
577 | sdp->sd_replayed_blocks++; | |
578 | } | |
579 | ||
580 | return error; | |
581 | } | |
582 | ||
7c0ef28a SW |
583 | /** |
584 | * gfs2_meta_sync - Sync all buffers associated with a glock | |
585 | * @gl: The glock | |
586 | * | |
587 | */ | |
588 | ||
589 | static void gfs2_meta_sync(struct gfs2_glock *gl) | |
590 | { | |
591 | struct address_space *mapping = gfs2_glock2aspace(gl); | |
70d4ee94 | 592 | struct gfs2_sbd *sdp = gl->gl_sbd; |
7c0ef28a SW |
593 | int error; |
594 | ||
70d4ee94 SW |
595 | if (mapping == NULL) |
596 | mapping = &sdp->sd_aspace; | |
597 | ||
7c0ef28a SW |
598 | filemap_fdatawrite(mapping); |
599 | error = filemap_fdatawait(mapping); | |
600 | ||
601 | if (error) | |
602 | gfs2_io_error(gl->gl_sbd); | |
603 | } | |
604 | ||
b3b94faa DT |
605 | static void buf_lo_after_scan(struct gfs2_jdesc *jd, int error, int pass) |
606 | { | |
feaa7bba SW |
607 | struct gfs2_inode *ip = GFS2_I(jd->jd_inode); |
608 | struct gfs2_sbd *sdp = GFS2_SB(jd->jd_inode); | |
b3b94faa DT |
609 | |
610 | if (error) { | |
7276b3b0 | 611 | gfs2_meta_sync(ip->i_gl); |
b3b94faa DT |
612 | return; |
613 | } | |
614 | if (pass != 1) | |
615 | return; | |
616 | ||
7276b3b0 | 617 | gfs2_meta_sync(ip->i_gl); |
b3b94faa DT |
618 | |
619 | fs_info(sdp, "jid=%u: Replayed %u of %u blocks\n", | |
620 | jd->jd_jid, sdp->sd_replayed_blocks, sdp->sd_found_blocks); | |
621 | } | |
622 | ||
b3b94faa DT |
623 | static void revoke_lo_before_commit(struct gfs2_sbd *sdp) |
624 | { | |
b3b94faa | 625 | struct gfs2_meta_header *mh; |
b3b94faa DT |
626 | unsigned int offset; |
627 | struct list_head *head = &sdp->sd_log_le_revoke; | |
82e86087 | 628 | struct gfs2_bufdata *bd; |
e8c92ed7 | 629 | struct page *page; |
dad30e90 | 630 | unsigned int length; |
b3b94faa | 631 | |
5d054964 | 632 | gfs2_write_revokes(sdp); |
b3b94faa DT |
633 | if (!sdp->sd_log_num_revoke) |
634 | return; | |
635 | ||
dad30e90 SW |
636 | length = gfs2_struct2blk(sdp, sdp->sd_log_num_revoke, sizeof(u64)); |
637 | page = gfs2_get_log_desc(sdp, GFS2_LOG_DESC_REVOKE, length, sdp->sd_log_num_revoke); | |
b3b94faa DT |
638 | offset = sizeof(struct gfs2_log_descriptor); |
639 | ||
c0752aa7 | 640 | list_for_each_entry(bd, head, bd_list) { |
b3b94faa DT |
641 | sdp->sd_log_num_revoke--; |
642 | ||
cd915493 | 643 | if (offset + sizeof(u64) > sdp->sd_sb.sb_bsize) { |
b3b94faa | 644 | |
e8c92ed7 SW |
645 | gfs2_log_write_page(sdp, page); |
646 | page = mempool_alloc(gfs2_page_pool, GFP_NOIO); | |
647 | mh = page_address(page); | |
648 | clear_page(mh); | |
b3b94faa | 649 | mh->mh_magic = cpu_to_be32(GFS2_MAGIC); |
e3167ded SW |
650 | mh->mh_type = cpu_to_be32(GFS2_METATYPE_LB); |
651 | mh->mh_format = cpu_to_be32(GFS2_FORMAT_LB); | |
b3b94faa DT |
652 | offset = sizeof(struct gfs2_meta_header); |
653 | } | |
654 | ||
e8c92ed7 | 655 | *(__be64 *)(page_address(page) + offset) = cpu_to_be64(bd->bd_blkno); |
cd915493 | 656 | offset += sizeof(u64); |
b3b94faa DT |
657 | } |
658 | gfs2_assert_withdraw(sdp, !sdp->sd_log_num_revoke); | |
659 | ||
e8c92ed7 | 660 | gfs2_log_write_page(sdp, page); |
b3b94faa DT |
661 | } |
662 | ||
16ca9412 | 663 | static void revoke_lo_after_commit(struct gfs2_sbd *sdp, struct gfs2_trans *tr) |
f42ab085 SW |
664 | { |
665 | struct list_head *head = &sdp->sd_log_le_revoke; | |
666 | struct gfs2_bufdata *bd; | |
667 | struct gfs2_glock *gl; | |
668 | ||
669 | while (!list_empty(head)) { | |
c0752aa7 BP |
670 | bd = list_entry(head->next, struct gfs2_bufdata, bd_list); |
671 | list_del_init(&bd->bd_list); | |
f42ab085 SW |
672 | gl = bd->bd_gl; |
673 | atomic_dec(&gl->gl_revokes); | |
674 | clear_bit(GLF_LFLUSH, &gl->gl_flags); | |
675 | kmem_cache_free(gfs2_bufdata_cachep, bd); | |
676 | } | |
677 | } | |
678 | ||
b3b94faa | 679 | static void revoke_lo_before_scan(struct gfs2_jdesc *jd, |
55167622 | 680 | struct gfs2_log_header_host *head, int pass) |
b3b94faa | 681 | { |
feaa7bba | 682 | struct gfs2_sbd *sdp = GFS2_SB(jd->jd_inode); |
b3b94faa DT |
683 | |
684 | if (pass != 0) | |
685 | return; | |
686 | ||
687 | sdp->sd_found_revokes = 0; | |
688 | sdp->sd_replay_tail = head->lh_tail; | |
689 | } | |
690 | ||
691 | static int revoke_lo_scan_elements(struct gfs2_jdesc *jd, unsigned int start, | |
692 | struct gfs2_log_descriptor *ld, __be64 *ptr, | |
693 | int pass) | |
694 | { | |
feaa7bba | 695 | struct gfs2_sbd *sdp = GFS2_SB(jd->jd_inode); |
b3b94faa DT |
696 | unsigned int blks = be32_to_cpu(ld->ld_length); |
697 | unsigned int revokes = be32_to_cpu(ld->ld_data1); | |
698 | struct buffer_head *bh; | |
699 | unsigned int offset; | |
cd915493 | 700 | u64 blkno; |
b3b94faa DT |
701 | int first = 1; |
702 | int error; | |
703 | ||
704 | if (pass != 0 || be32_to_cpu(ld->ld_type) != GFS2_LOG_DESC_REVOKE) | |
705 | return 0; | |
706 | ||
707 | offset = sizeof(struct gfs2_log_descriptor); | |
708 | ||
709 | for (; blks; gfs2_replay_incr_blk(sdp, &start), blks--) { | |
710 | error = gfs2_replay_read_block(jd, start, &bh); | |
711 | if (error) | |
712 | return error; | |
713 | ||
714 | if (!first) | |
715 | gfs2_metatype_check(sdp, bh, GFS2_METATYPE_LB); | |
716 | ||
cd915493 | 717 | while (offset + sizeof(u64) <= sdp->sd_sb.sb_bsize) { |
b3b94faa DT |
718 | blkno = be64_to_cpu(*(__be64 *)(bh->b_data + offset)); |
719 | ||
720 | error = gfs2_revoke_add(sdp, blkno, start); | |
3ad62e87 BP |
721 | if (error < 0) { |
722 | brelse(bh); | |
b3b94faa | 723 | return error; |
3ad62e87 | 724 | } |
b3b94faa DT |
725 | else if (error) |
726 | sdp->sd_found_revokes++; | |
727 | ||
728 | if (!--revokes) | |
729 | break; | |
cd915493 | 730 | offset += sizeof(u64); |
b3b94faa DT |
731 | } |
732 | ||
733 | brelse(bh); | |
734 | offset = sizeof(struct gfs2_meta_header); | |
735 | first = 0; | |
736 | } | |
737 | ||
738 | return 0; | |
739 | } | |
740 | ||
741 | static void revoke_lo_after_scan(struct gfs2_jdesc *jd, int error, int pass) | |
742 | { | |
feaa7bba | 743 | struct gfs2_sbd *sdp = GFS2_SB(jd->jd_inode); |
b3b94faa DT |
744 | |
745 | if (error) { | |
746 | gfs2_revoke_clean(sdp); | |
747 | return; | |
748 | } | |
749 | if (pass != 1) | |
750 | return; | |
751 | ||
752 | fs_info(sdp, "jid=%u: Found %u revoke tags\n", | |
753 | jd->jd_jid, sdp->sd_found_revokes); | |
754 | ||
755 | gfs2_revoke_clean(sdp); | |
756 | } | |
757 | ||
16615be1 SW |
758 | /** |
759 | * databuf_lo_before_commit - Scan the data buffers, writing as we go | |
760 | * | |
761 | */ | |
762 | ||
763 | static void databuf_lo_before_commit(struct gfs2_sbd *sdp) | |
764 | { | |
dad30e90 | 765 | unsigned int limit = buf_limit(sdp) / 2; |
16615be1 | 766 | |
dad30e90 SW |
767 | gfs2_before_commit(sdp, limit, sdp->sd_log_num_databuf, |
768 | &sdp->sd_log_le_databuf, 1); | |
18ec7d5c SW |
769 | } |
770 | ||
771 | static int databuf_lo_scan_elements(struct gfs2_jdesc *jd, unsigned int start, | |
772 | struct gfs2_log_descriptor *ld, | |
773 | __be64 *ptr, int pass) | |
774 | { | |
feaa7bba SW |
775 | struct gfs2_inode *ip = GFS2_I(jd->jd_inode); |
776 | struct gfs2_sbd *sdp = GFS2_SB(jd->jd_inode); | |
5c676f6d | 777 | struct gfs2_glock *gl = ip->i_gl; |
18ec7d5c SW |
778 | unsigned int blks = be32_to_cpu(ld->ld_data1); |
779 | struct buffer_head *bh_log, *bh_ip; | |
cd915493 SW |
780 | u64 blkno; |
781 | u64 esc; | |
18ec7d5c SW |
782 | int error = 0; |
783 | ||
784 | if (pass != 1 || be32_to_cpu(ld->ld_type) != GFS2_LOG_DESC_JDATA) | |
785 | return 0; | |
786 | ||
787 | gfs2_replay_incr_blk(sdp, &start); | |
788 | for (; blks; gfs2_replay_incr_blk(sdp, &start), blks--) { | |
789 | blkno = be64_to_cpu(*ptr++); | |
790 | esc = be64_to_cpu(*ptr++); | |
791 | ||
792 | sdp->sd_found_blocks++; | |
793 | ||
794 | if (gfs2_revoke_check(sdp, blkno, start)) | |
795 | continue; | |
796 | ||
797 | error = gfs2_replay_read_block(jd, start, &bh_log); | |
798 | if (error) | |
799 | return error; | |
800 | ||
801 | bh_ip = gfs2_meta_new(gl, blkno); | |
802 | memcpy(bh_ip->b_data, bh_log->b_data, bh_log->b_size); | |
803 | ||
804 | /* Unescape */ | |
805 | if (esc) { | |
806 | __be32 *eptr = (__be32 *)bh_ip->b_data; | |
807 | *eptr = cpu_to_be32(GFS2_MAGIC); | |
808 | } | |
809 | mark_buffer_dirty(bh_ip); | |
810 | ||
811 | brelse(bh_log); | |
812 | brelse(bh_ip); | |
18ec7d5c SW |
813 | |
814 | sdp->sd_replayed_blocks++; | |
815 | } | |
816 | ||
817 | return error; | |
818 | } | |
819 | ||
820 | /* FIXME: sort out accounting for log blocks etc. */ | |
821 | ||
822 | static void databuf_lo_after_scan(struct gfs2_jdesc *jd, int error, int pass) | |
823 | { | |
feaa7bba SW |
824 | struct gfs2_inode *ip = GFS2_I(jd->jd_inode); |
825 | struct gfs2_sbd *sdp = GFS2_SB(jd->jd_inode); | |
18ec7d5c SW |
826 | |
827 | if (error) { | |
7276b3b0 | 828 | gfs2_meta_sync(ip->i_gl); |
18ec7d5c SW |
829 | return; |
830 | } | |
831 | if (pass != 1) | |
832 | return; | |
833 | ||
834 | /* data sync? */ | |
7276b3b0 | 835 | gfs2_meta_sync(ip->i_gl); |
18ec7d5c SW |
836 | |
837 | fs_info(sdp, "jid=%u: Replayed %u of %u data blocks\n", | |
838 | jd->jd_jid, sdp->sd_replayed_blocks, sdp->sd_found_blocks); | |
839 | } | |
840 | ||
16ca9412 | 841 | static void databuf_lo_after_commit(struct gfs2_sbd *sdp, struct gfs2_trans *tr) |
18ec7d5c SW |
842 | { |
843 | struct list_head *head = &sdp->sd_log_le_databuf; | |
844 | struct gfs2_bufdata *bd; | |
845 | ||
16ca9412 BM |
846 | if (tr == NULL) { |
847 | gfs2_assert(sdp, list_empty(head)); | |
848 | return; | |
849 | } | |
850 | ||
18ec7d5c | 851 | while (!list_empty(head)) { |
c0752aa7 BP |
852 | bd = list_entry(head->next, struct gfs2_bufdata, bd_list); |
853 | list_del_init(&bd->bd_list); | |
18ec7d5c | 854 | sdp->sd_log_num_databuf--; |
16ca9412 | 855 | gfs2_unpin(sdp, bd->bd_bh, tr); |
18ec7d5c | 856 | } |
b3b94faa DT |
857 | gfs2_assert_warn(sdp, !sdp->sd_log_num_databuf); |
858 | } | |
859 | ||
18ec7d5c | 860 | |
b09e593d | 861 | const struct gfs2_log_operations gfs2_buf_lops = { |
b3b94faa DT |
862 | .lo_before_commit = buf_lo_before_commit, |
863 | .lo_after_commit = buf_lo_after_commit, | |
864 | .lo_before_scan = buf_lo_before_scan, | |
865 | .lo_scan_elements = buf_lo_scan_elements, | |
866 | .lo_after_scan = buf_lo_after_scan, | |
ea67eedb | 867 | .lo_name = "buf", |
b3b94faa DT |
868 | }; |
869 | ||
b09e593d | 870 | const struct gfs2_log_operations gfs2_revoke_lops = { |
b3b94faa | 871 | .lo_before_commit = revoke_lo_before_commit, |
f42ab085 | 872 | .lo_after_commit = revoke_lo_after_commit, |
b3b94faa DT |
873 | .lo_before_scan = revoke_lo_before_scan, |
874 | .lo_scan_elements = revoke_lo_scan_elements, | |
875 | .lo_after_scan = revoke_lo_after_scan, | |
ea67eedb | 876 | .lo_name = "revoke", |
b3b94faa DT |
877 | }; |
878 | ||
b09e593d | 879 | const struct gfs2_log_operations gfs2_databuf_lops = { |
b3b94faa | 880 | .lo_before_commit = databuf_lo_before_commit, |
18ec7d5c SW |
881 | .lo_after_commit = databuf_lo_after_commit, |
882 | .lo_scan_elements = databuf_lo_scan_elements, | |
883 | .lo_after_scan = databuf_lo_after_scan, | |
ea67eedb | 884 | .lo_name = "databuf", |
b3b94faa DT |
885 | }; |
886 | ||
b09e593d | 887 | const struct gfs2_log_operations *gfs2_log_ops[] = { |
16615be1 | 888 | &gfs2_databuf_lops, |
b3b94faa | 889 | &gfs2_buf_lops, |
16615be1 | 890 | &gfs2_revoke_lops, |
ea67eedb | 891 | NULL, |
b3b94faa DT |
892 | }; |
893 |