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e8062719 BH |
1 | /* |
2 | * Copyright (C) 2005, 2006 | |
27d2e149 | 3 | * Avishay Traeger (avishay@gmail.com) |
e8062719 BH |
4 | * Copyright (C) 2008, 2009 |
5 | * Boaz Harrosh <bharrosh@panasas.com> | |
6 | * | |
7 | * Copyrights for code taken from ext2: | |
8 | * Copyright (C) 1992, 1993, 1994, 1995 | |
9 | * Remy Card (card@masi.ibp.fr) | |
10 | * Laboratoire MASI - Institut Blaise Pascal | |
11 | * Universite Pierre et Marie Curie (Paris VI) | |
12 | * from | |
13 | * linux/fs/minix/inode.c | |
14 | * Copyright (C) 1991, 1992 Linus Torvalds | |
15 | * | |
16 | * This file is part of exofs. | |
17 | * | |
18 | * exofs is free software; you can redistribute it and/or modify | |
19 | * it under the terms of the GNU General Public License as published by | |
20 | * the Free Software Foundation. Since it is based on ext2, and the only | |
21 | * valid version of GPL for the Linux kernel is version 2, the only valid | |
22 | * version of GPL for exofs is version 2. | |
23 | * | |
24 | * exofs is distributed in the hope that it will be useful, | |
25 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
26 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
27 | * GNU General Public License for more details. | |
28 | * | |
29 | * You should have received a copy of the GNU General Public License | |
30 | * along with exofs; if not, write to the Free Software | |
31 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | |
32 | */ | |
33 | ||
34 | #include <linux/writeback.h> | |
35 | #include <linux/buffer_head.h> | |
beaec07b | 36 | #include <scsi/scsi_device.h> |
e8062719 BH |
37 | |
38 | #include "exofs.h" | |
39 | ||
40 | #ifdef CONFIG_EXOFS_DEBUG | |
41 | # define EXOFS_DEBUG_OBJ_ISIZE 1 | |
42 | #endif | |
43 | ||
beaec07b BH |
44 | struct page_collect { |
45 | struct exofs_sb_info *sbi; | |
46 | struct request_queue *req_q; | |
47 | struct inode *inode; | |
48 | unsigned expected_pages; | |
49 | ||
50 | struct bio *bio; | |
51 | unsigned nr_pages; | |
52 | unsigned long length; | |
53 | loff_t pg_first; /* keep 64bit also in 32-arches */ | |
54 | }; | |
55 | ||
56 | static void _pcol_init(struct page_collect *pcol, unsigned expected_pages, | |
57 | struct inode *inode) | |
58 | { | |
59 | struct exofs_sb_info *sbi = inode->i_sb->s_fs_info; | |
beaec07b BH |
60 | |
61 | pcol->sbi = sbi; | |
fc2fac5b | 62 | pcol->req_q = osd_request_queue(sbi->s_dev); |
beaec07b BH |
63 | pcol->inode = inode; |
64 | pcol->expected_pages = expected_pages; | |
65 | ||
66 | pcol->bio = NULL; | |
67 | pcol->nr_pages = 0; | |
68 | pcol->length = 0; | |
69 | pcol->pg_first = -1; | |
70 | ||
71 | EXOFS_DBGMSG("_pcol_init ino=0x%lx expected_pages=%u\n", inode->i_ino, | |
72 | expected_pages); | |
73 | } | |
74 | ||
75 | static void _pcol_reset(struct page_collect *pcol) | |
76 | { | |
77 | pcol->expected_pages -= min(pcol->nr_pages, pcol->expected_pages); | |
78 | ||
79 | pcol->bio = NULL; | |
80 | pcol->nr_pages = 0; | |
81 | pcol->length = 0; | |
82 | pcol->pg_first = -1; | |
83 | EXOFS_DBGMSG("_pcol_reset ino=0x%lx expected_pages=%u\n", | |
84 | pcol->inode->i_ino, pcol->expected_pages); | |
85 | ||
86 | /* this is probably the end of the loop but in writes | |
87 | * it might not end here. don't be left with nothing | |
88 | */ | |
89 | if (!pcol->expected_pages) | |
90 | pcol->expected_pages = 128; | |
91 | } | |
92 | ||
93 | static int pcol_try_alloc(struct page_collect *pcol) | |
94 | { | |
95 | int pages = min_t(unsigned, pcol->expected_pages, BIO_MAX_PAGES); | |
96 | ||
97 | for (; pages; pages >>= 1) { | |
98 | pcol->bio = bio_alloc(GFP_KERNEL, pages); | |
99 | if (likely(pcol->bio)) | |
100 | return 0; | |
101 | } | |
102 | ||
103 | EXOFS_ERR("Failed to kcalloc expected_pages=%u\n", | |
104 | pcol->expected_pages); | |
105 | return -ENOMEM; | |
106 | } | |
107 | ||
108 | static void pcol_free(struct page_collect *pcol) | |
109 | { | |
110 | bio_put(pcol->bio); | |
111 | pcol->bio = NULL; | |
112 | } | |
113 | ||
114 | static int pcol_add_page(struct page_collect *pcol, struct page *page, | |
115 | unsigned len) | |
116 | { | |
117 | int added_len = bio_add_pc_page(pcol->req_q, pcol->bio, page, len, 0); | |
118 | if (unlikely(len != added_len)) | |
119 | return -ENOMEM; | |
120 | ||
121 | ++pcol->nr_pages; | |
122 | pcol->length += len; | |
123 | return 0; | |
124 | } | |
125 | ||
126 | static int update_read_page(struct page *page, int ret) | |
127 | { | |
128 | if (ret == 0) { | |
129 | /* Everything is OK */ | |
130 | SetPageUptodate(page); | |
131 | if (PageError(page)) | |
132 | ClearPageError(page); | |
133 | } else if (ret == -EFAULT) { | |
134 | /* In this case we were trying to read something that wasn't on | |
135 | * disk yet - return a page full of zeroes. This should be OK, | |
136 | * because the object should be empty (if there was a write | |
137 | * before this read, the read would be waiting with the page | |
138 | * locked */ | |
139 | clear_highpage(page); | |
140 | ||
141 | SetPageUptodate(page); | |
142 | if (PageError(page)) | |
143 | ClearPageError(page); | |
144 | ret = 0; /* recovered error */ | |
145 | EXOFS_DBGMSG("recovered read error\n"); | |
146 | } else /* Error */ | |
147 | SetPageError(page); | |
148 | ||
149 | return ret; | |
150 | } | |
151 | ||
152 | static void update_write_page(struct page *page, int ret) | |
153 | { | |
154 | if (ret) { | |
155 | mapping_set_error(page->mapping, ret); | |
156 | SetPageError(page); | |
157 | } | |
158 | end_page_writeback(page); | |
159 | } | |
160 | ||
161 | /* Called at the end of reads, to optionally unlock pages and update their | |
162 | * status. | |
163 | */ | |
164 | static int __readpages_done(struct osd_request *or, struct page_collect *pcol, | |
165 | bool do_unlock) | |
166 | { | |
167 | struct bio_vec *bvec; | |
168 | int i; | |
169 | u64 resid; | |
170 | u64 good_bytes; | |
171 | u64 length = 0; | |
172 | int ret = exofs_check_ok_resid(or, &resid, NULL); | |
173 | ||
174 | osd_end_request(or); | |
175 | ||
176 | if (likely(!ret)) | |
177 | good_bytes = pcol->length; | |
178 | else if (!resid) | |
179 | good_bytes = 0; | |
180 | else | |
181 | good_bytes = pcol->length - resid; | |
182 | ||
183 | EXOFS_DBGMSG("readpages_done(0x%lx) good_bytes=0x%llx" | |
184 | " length=0x%lx nr_pages=%u\n", | |
185 | pcol->inode->i_ino, _LLU(good_bytes), pcol->length, | |
186 | pcol->nr_pages); | |
187 | ||
188 | __bio_for_each_segment(bvec, pcol->bio, i, 0) { | |
189 | struct page *page = bvec->bv_page; | |
190 | struct inode *inode = page->mapping->host; | |
191 | int page_stat; | |
192 | ||
193 | if (inode != pcol->inode) | |
194 | continue; /* osd might add more pages at end */ | |
195 | ||
196 | if (likely(length < good_bytes)) | |
197 | page_stat = 0; | |
198 | else | |
199 | page_stat = ret; | |
200 | ||
201 | EXOFS_DBGMSG(" readpages_done(0x%lx, 0x%lx) %s\n", | |
202 | inode->i_ino, page->index, | |
203 | page_stat ? "bad_bytes" : "good_bytes"); | |
204 | ||
205 | ret = update_read_page(page, page_stat); | |
206 | if (do_unlock) | |
207 | unlock_page(page); | |
208 | length += bvec->bv_len; | |
209 | } | |
210 | ||
211 | pcol_free(pcol); | |
212 | EXOFS_DBGMSG("readpages_done END\n"); | |
213 | return ret; | |
214 | } | |
215 | ||
216 | /* callback of async reads */ | |
217 | static void readpages_done(struct osd_request *or, void *p) | |
218 | { | |
219 | struct page_collect *pcol = p; | |
220 | ||
221 | __readpages_done(or, pcol, true); | |
222 | atomic_dec(&pcol->sbi->s_curr_pending); | |
223 | kfree(p); | |
224 | } | |
225 | ||
226 | static void _unlock_pcol_pages(struct page_collect *pcol, int ret, int rw) | |
227 | { | |
228 | struct bio_vec *bvec; | |
229 | int i; | |
230 | ||
231 | __bio_for_each_segment(bvec, pcol->bio, i, 0) { | |
232 | struct page *page = bvec->bv_page; | |
233 | ||
234 | if (rw == READ) | |
235 | update_read_page(page, ret); | |
236 | else | |
237 | update_write_page(page, ret); | |
238 | ||
239 | unlock_page(page); | |
240 | } | |
241 | pcol_free(pcol); | |
242 | } | |
243 | ||
244 | static int read_exec(struct page_collect *pcol, bool is_sync) | |
245 | { | |
246 | struct exofs_i_info *oi = exofs_i(pcol->inode); | |
247 | struct osd_obj_id obj = {pcol->sbi->s_pid, | |
248 | pcol->inode->i_ino + EXOFS_OBJ_OFF}; | |
249 | struct osd_request *or = NULL; | |
250 | struct page_collect *pcol_copy = NULL; | |
251 | loff_t i_start = pcol->pg_first << PAGE_CACHE_SHIFT; | |
252 | int ret; | |
253 | ||
254 | if (!pcol->bio) | |
255 | return 0; | |
256 | ||
257 | /* see comment in _readpage() about sync reads */ | |
258 | WARN_ON(is_sync && (pcol->nr_pages != 1)); | |
259 | ||
260 | or = osd_start_request(pcol->sbi->s_dev, GFP_KERNEL); | |
261 | if (unlikely(!or)) { | |
262 | ret = -ENOMEM; | |
263 | goto err; | |
264 | } | |
265 | ||
62f469b5 | 266 | osd_req_read(or, &obj, i_start, pcol->bio, pcol->length); |
beaec07b BH |
267 | |
268 | if (is_sync) { | |
269 | exofs_sync_op(or, pcol->sbi->s_timeout, oi->i_cred); | |
270 | return __readpages_done(or, pcol, false); | |
271 | } | |
272 | ||
273 | pcol_copy = kmalloc(sizeof(*pcol_copy), GFP_KERNEL); | |
274 | if (!pcol_copy) { | |
275 | ret = -ENOMEM; | |
276 | goto err; | |
277 | } | |
278 | ||
279 | *pcol_copy = *pcol; | |
280 | ret = exofs_async_op(or, readpages_done, pcol_copy, oi->i_cred); | |
281 | if (unlikely(ret)) | |
282 | goto err; | |
283 | ||
284 | atomic_inc(&pcol->sbi->s_curr_pending); | |
285 | ||
286 | EXOFS_DBGMSG("read_exec obj=0x%llx start=0x%llx length=0x%lx\n", | |
287 | obj.id, _LLU(i_start), pcol->length); | |
288 | ||
289 | /* pages ownership was passed to pcol_copy */ | |
290 | _pcol_reset(pcol); | |
291 | return 0; | |
292 | ||
293 | err: | |
294 | if (!is_sync) | |
295 | _unlock_pcol_pages(pcol, ret, READ); | |
b76a3f93 BH |
296 | else /* Pages unlocked by caller in sync mode only free bio */ |
297 | pcol_free(pcol); | |
298 | ||
beaec07b BH |
299 | kfree(pcol_copy); |
300 | if (or) | |
301 | osd_end_request(or); | |
302 | return ret; | |
303 | } | |
304 | ||
305 | /* readpage_strip is called either directly from readpage() or by the VFS from | |
306 | * within read_cache_pages(), to add one more page to be read. It will try to | |
307 | * collect as many contiguous pages as posible. If a discontinuity is | |
308 | * encountered, or it runs out of resources, it will submit the previous segment | |
309 | * and will start a new collection. Eventually caller must submit the last | |
310 | * segment if present. | |
311 | */ | |
312 | static int readpage_strip(void *data, struct page *page) | |
313 | { | |
314 | struct page_collect *pcol = data; | |
315 | struct inode *inode = pcol->inode; | |
316 | struct exofs_i_info *oi = exofs_i(inode); | |
317 | loff_t i_size = i_size_read(inode); | |
318 | pgoff_t end_index = i_size >> PAGE_CACHE_SHIFT; | |
319 | size_t len; | |
320 | int ret; | |
321 | ||
322 | /* FIXME: Just for debugging, will be removed */ | |
323 | if (PageUptodate(page)) | |
324 | EXOFS_ERR("PageUptodate(0x%lx, 0x%lx)\n", pcol->inode->i_ino, | |
325 | page->index); | |
326 | ||
327 | if (page->index < end_index) | |
328 | len = PAGE_CACHE_SIZE; | |
329 | else if (page->index == end_index) | |
330 | len = i_size & ~PAGE_CACHE_MASK; | |
331 | else | |
332 | len = 0; | |
333 | ||
334 | if (!len || !obj_created(oi)) { | |
335 | /* this will be out of bounds, or doesn't exist yet. | |
336 | * Current page is cleared and the request is split | |
337 | */ | |
338 | clear_highpage(page); | |
339 | ||
340 | SetPageUptodate(page); | |
341 | if (PageError(page)) | |
342 | ClearPageError(page); | |
343 | ||
344 | unlock_page(page); | |
345 | EXOFS_DBGMSG("readpage_strip(0x%lx, 0x%lx) empty page," | |
346 | " splitting\n", inode->i_ino, page->index); | |
347 | ||
348 | return read_exec(pcol, false); | |
349 | } | |
350 | ||
351 | try_again: | |
352 | ||
353 | if (unlikely(pcol->pg_first == -1)) { | |
354 | pcol->pg_first = page->index; | |
355 | } else if (unlikely((pcol->pg_first + pcol->nr_pages) != | |
356 | page->index)) { | |
357 | /* Discontinuity detected, split the request */ | |
358 | ret = read_exec(pcol, false); | |
359 | if (unlikely(ret)) | |
360 | goto fail; | |
361 | goto try_again; | |
362 | } | |
363 | ||
364 | if (!pcol->bio) { | |
365 | ret = pcol_try_alloc(pcol); | |
366 | if (unlikely(ret)) | |
367 | goto fail; | |
368 | } | |
369 | ||
370 | if (len != PAGE_CACHE_SIZE) | |
371 | zero_user(page, len, PAGE_CACHE_SIZE - len); | |
372 | ||
373 | EXOFS_DBGMSG(" readpage_strip(0x%lx, 0x%lx) len=0x%zx\n", | |
374 | inode->i_ino, page->index, len); | |
375 | ||
376 | ret = pcol_add_page(pcol, page, len); | |
377 | if (ret) { | |
378 | EXOFS_DBGMSG("Failed pcol_add_page pages[i]=%p " | |
379 | "this_len=0x%zx nr_pages=%u length=0x%lx\n", | |
380 | page, len, pcol->nr_pages, pcol->length); | |
381 | ||
382 | /* split the request, and start again with current page */ | |
383 | ret = read_exec(pcol, false); | |
384 | if (unlikely(ret)) | |
385 | goto fail; | |
386 | ||
387 | goto try_again; | |
388 | } | |
389 | ||
390 | return 0; | |
391 | ||
392 | fail: | |
393 | /* SetPageError(page); ??? */ | |
394 | unlock_page(page); | |
395 | return ret; | |
396 | } | |
397 | ||
398 | static int exofs_readpages(struct file *file, struct address_space *mapping, | |
399 | struct list_head *pages, unsigned nr_pages) | |
400 | { | |
401 | struct page_collect pcol; | |
402 | int ret; | |
403 | ||
404 | _pcol_init(&pcol, nr_pages, mapping->host); | |
405 | ||
406 | ret = read_cache_pages(mapping, pages, readpage_strip, &pcol); | |
407 | if (ret) { | |
408 | EXOFS_ERR("read_cache_pages => %d\n", ret); | |
409 | return ret; | |
410 | } | |
411 | ||
412 | return read_exec(&pcol, false); | |
413 | } | |
414 | ||
415 | static int _readpage(struct page *page, bool is_sync) | |
416 | { | |
417 | struct page_collect pcol; | |
418 | int ret; | |
419 | ||
420 | _pcol_init(&pcol, 1, page->mapping->host); | |
421 | ||
422 | /* readpage_strip might call read_exec(,async) inside at several places | |
423 | * but this is safe for is_async=0 since read_exec will not do anything | |
424 | * when we have a single page. | |
425 | */ | |
426 | ret = readpage_strip(&pcol, page); | |
427 | if (ret) { | |
428 | EXOFS_ERR("_readpage => %d\n", ret); | |
429 | return ret; | |
430 | } | |
431 | ||
432 | return read_exec(&pcol, is_sync); | |
433 | } | |
434 | ||
435 | /* | |
436 | * We don't need the file | |
437 | */ | |
438 | static int exofs_readpage(struct file *file, struct page *page) | |
439 | { | |
440 | return _readpage(page, false); | |
441 | } | |
442 | ||
443 | /* Callback for osd_write. All writes are asynchronouse */ | |
444 | static void writepages_done(struct osd_request *or, void *p) | |
445 | { | |
446 | struct page_collect *pcol = p; | |
447 | struct bio_vec *bvec; | |
448 | int i; | |
449 | u64 resid; | |
450 | u64 good_bytes; | |
451 | u64 length = 0; | |
452 | ||
453 | int ret = exofs_check_ok_resid(or, NULL, &resid); | |
454 | ||
455 | osd_end_request(or); | |
456 | atomic_dec(&pcol->sbi->s_curr_pending); | |
457 | ||
458 | if (likely(!ret)) | |
459 | good_bytes = pcol->length; | |
460 | else if (!resid) | |
461 | good_bytes = 0; | |
462 | else | |
463 | good_bytes = pcol->length - resid; | |
464 | ||
465 | EXOFS_DBGMSG("writepages_done(0x%lx) good_bytes=0x%llx" | |
466 | " length=0x%lx nr_pages=%u\n", | |
467 | pcol->inode->i_ino, _LLU(good_bytes), pcol->length, | |
468 | pcol->nr_pages); | |
469 | ||
470 | __bio_for_each_segment(bvec, pcol->bio, i, 0) { | |
471 | struct page *page = bvec->bv_page; | |
472 | struct inode *inode = page->mapping->host; | |
473 | int page_stat; | |
474 | ||
475 | if (inode != pcol->inode) | |
476 | continue; /* osd might add more pages to a bio */ | |
477 | ||
478 | if (likely(length < good_bytes)) | |
479 | page_stat = 0; | |
480 | else | |
481 | page_stat = ret; | |
482 | ||
483 | update_write_page(page, page_stat); | |
484 | unlock_page(page); | |
485 | EXOFS_DBGMSG(" writepages_done(0x%lx, 0x%lx) status=%d\n", | |
486 | inode->i_ino, page->index, page_stat); | |
487 | ||
488 | length += bvec->bv_len; | |
489 | } | |
490 | ||
491 | pcol_free(pcol); | |
492 | kfree(pcol); | |
493 | EXOFS_DBGMSG("writepages_done END\n"); | |
494 | } | |
495 | ||
496 | static int write_exec(struct page_collect *pcol) | |
497 | { | |
498 | struct exofs_i_info *oi = exofs_i(pcol->inode); | |
499 | struct osd_obj_id obj = {pcol->sbi->s_pid, | |
500 | pcol->inode->i_ino + EXOFS_OBJ_OFF}; | |
501 | struct osd_request *or = NULL; | |
502 | struct page_collect *pcol_copy = NULL; | |
503 | loff_t i_start = pcol->pg_first << PAGE_CACHE_SHIFT; | |
504 | int ret; | |
505 | ||
506 | if (!pcol->bio) | |
507 | return 0; | |
508 | ||
509 | or = osd_start_request(pcol->sbi->s_dev, GFP_KERNEL); | |
510 | if (unlikely(!or)) { | |
511 | EXOFS_ERR("write_exec: Faild to osd_start_request()\n"); | |
512 | ret = -ENOMEM; | |
513 | goto err; | |
514 | } | |
515 | ||
516 | pcol_copy = kmalloc(sizeof(*pcol_copy), GFP_KERNEL); | |
517 | if (!pcol_copy) { | |
518 | EXOFS_ERR("write_exec: Faild to kmalloc(pcol)\n"); | |
519 | ret = -ENOMEM; | |
520 | goto err; | |
521 | } | |
522 | ||
523 | *pcol_copy = *pcol; | |
524 | ||
62f469b5 BH |
525 | pcol_copy->bio->bi_rw |= (1 << BIO_RW); /* FIXME: bio_set_dir() */ |
526 | osd_req_write(or, &obj, i_start, pcol_copy->bio, pcol_copy->length); | |
beaec07b BH |
527 | ret = exofs_async_op(or, writepages_done, pcol_copy, oi->i_cred); |
528 | if (unlikely(ret)) { | |
529 | EXOFS_ERR("write_exec: exofs_async_op() Faild\n"); | |
530 | goto err; | |
531 | } | |
532 | ||
533 | atomic_inc(&pcol->sbi->s_curr_pending); | |
534 | EXOFS_DBGMSG("write_exec(0x%lx, 0x%llx) start=0x%llx length=0x%lx\n", | |
535 | pcol->inode->i_ino, pcol->pg_first, _LLU(i_start), | |
536 | pcol->length); | |
537 | /* pages ownership was passed to pcol_copy */ | |
538 | _pcol_reset(pcol); | |
539 | return 0; | |
540 | ||
541 | err: | |
542 | _unlock_pcol_pages(pcol, ret, WRITE); | |
543 | kfree(pcol_copy); | |
544 | if (or) | |
545 | osd_end_request(or); | |
546 | return ret; | |
547 | } | |
548 | ||
549 | /* writepage_strip is called either directly from writepage() or by the VFS from | |
550 | * within write_cache_pages(), to add one more page to be written to storage. | |
551 | * It will try to collect as many contiguous pages as possible. If a | |
552 | * discontinuity is encountered or it runs out of resources it will submit the | |
553 | * previous segment and will start a new collection. | |
554 | * Eventually caller must submit the last segment if present. | |
555 | */ | |
556 | static int writepage_strip(struct page *page, | |
557 | struct writeback_control *wbc_unused, void *data) | |
558 | { | |
559 | struct page_collect *pcol = data; | |
560 | struct inode *inode = pcol->inode; | |
561 | struct exofs_i_info *oi = exofs_i(inode); | |
562 | loff_t i_size = i_size_read(inode); | |
563 | pgoff_t end_index = i_size >> PAGE_CACHE_SHIFT; | |
564 | size_t len; | |
565 | int ret; | |
566 | ||
567 | BUG_ON(!PageLocked(page)); | |
568 | ||
569 | ret = wait_obj_created(oi); | |
570 | if (unlikely(ret)) | |
571 | goto fail; | |
572 | ||
573 | if (page->index < end_index) | |
574 | /* in this case, the page is within the limits of the file */ | |
575 | len = PAGE_CACHE_SIZE; | |
576 | else { | |
577 | len = i_size & ~PAGE_CACHE_MASK; | |
578 | ||
579 | if (page->index > end_index || !len) { | |
580 | /* in this case, the page is outside the limits | |
581 | * (truncate in progress) | |
582 | */ | |
583 | ret = write_exec(pcol); | |
584 | if (unlikely(ret)) | |
585 | goto fail; | |
586 | if (PageError(page)) | |
587 | ClearPageError(page); | |
588 | unlock_page(page); | |
589 | return 0; | |
590 | } | |
591 | } | |
592 | ||
593 | try_again: | |
594 | ||
595 | if (unlikely(pcol->pg_first == -1)) { | |
596 | pcol->pg_first = page->index; | |
597 | } else if (unlikely((pcol->pg_first + pcol->nr_pages) != | |
598 | page->index)) { | |
599 | /* Discontinuity detected, split the request */ | |
600 | ret = write_exec(pcol); | |
601 | if (unlikely(ret)) | |
602 | goto fail; | |
603 | goto try_again; | |
604 | } | |
605 | ||
606 | if (!pcol->bio) { | |
607 | ret = pcol_try_alloc(pcol); | |
608 | if (unlikely(ret)) | |
609 | goto fail; | |
610 | } | |
611 | ||
612 | EXOFS_DBGMSG(" writepage_strip(0x%lx, 0x%lx) len=0x%zx\n", | |
613 | inode->i_ino, page->index, len); | |
614 | ||
615 | ret = pcol_add_page(pcol, page, len); | |
616 | if (unlikely(ret)) { | |
617 | EXOFS_DBGMSG("Failed pcol_add_page " | |
618 | "nr_pages=%u total_length=0x%lx\n", | |
619 | pcol->nr_pages, pcol->length); | |
620 | ||
621 | /* split the request, next loop will start again */ | |
622 | ret = write_exec(pcol); | |
623 | if (unlikely(ret)) { | |
624 | EXOFS_DBGMSG("write_exec faild => %d", ret); | |
625 | goto fail; | |
626 | } | |
627 | ||
628 | goto try_again; | |
629 | } | |
630 | ||
631 | BUG_ON(PageWriteback(page)); | |
632 | set_page_writeback(page); | |
633 | ||
634 | return 0; | |
635 | ||
636 | fail: | |
637 | set_bit(AS_EIO, &page->mapping->flags); | |
638 | unlock_page(page); | |
639 | return ret; | |
640 | } | |
641 | ||
642 | static int exofs_writepages(struct address_space *mapping, | |
643 | struct writeback_control *wbc) | |
644 | { | |
645 | struct page_collect pcol; | |
646 | long start, end, expected_pages; | |
647 | int ret; | |
648 | ||
649 | start = wbc->range_start >> PAGE_CACHE_SHIFT; | |
650 | end = (wbc->range_end == LLONG_MAX) ? | |
651 | start + mapping->nrpages : | |
652 | wbc->range_end >> PAGE_CACHE_SHIFT; | |
653 | ||
654 | if (start || end) | |
655 | expected_pages = min(end - start + 1, 32L); | |
656 | else | |
657 | expected_pages = mapping->nrpages; | |
658 | ||
659 | EXOFS_DBGMSG("inode(0x%lx) wbc->start=0x%llx wbc->end=0x%llx" | |
660 | " m->nrpages=%lu start=0x%lx end=0x%lx\n", | |
661 | mapping->host->i_ino, wbc->range_start, wbc->range_end, | |
662 | mapping->nrpages, start, end); | |
663 | ||
664 | _pcol_init(&pcol, expected_pages, mapping->host); | |
665 | ||
666 | ret = write_cache_pages(mapping, wbc, writepage_strip, &pcol); | |
667 | if (ret) { | |
668 | EXOFS_ERR("write_cache_pages => %d\n", ret); | |
669 | return ret; | |
670 | } | |
671 | ||
672 | return write_exec(&pcol); | |
673 | } | |
674 | ||
675 | static int exofs_writepage(struct page *page, struct writeback_control *wbc) | |
676 | { | |
677 | struct page_collect pcol; | |
678 | int ret; | |
679 | ||
680 | _pcol_init(&pcol, 1, page->mapping->host); | |
681 | ||
682 | ret = writepage_strip(page, NULL, &pcol); | |
683 | if (ret) { | |
684 | EXOFS_ERR("exofs_writepage => %d\n", ret); | |
685 | return ret; | |
686 | } | |
687 | ||
688 | return write_exec(&pcol); | |
689 | } | |
690 | ||
691 | int exofs_write_begin(struct file *file, struct address_space *mapping, | |
692 | loff_t pos, unsigned len, unsigned flags, | |
693 | struct page **pagep, void **fsdata) | |
694 | { | |
695 | int ret = 0; | |
696 | struct page *page; | |
697 | ||
698 | page = *pagep; | |
699 | if (page == NULL) { | |
700 | ret = simple_write_begin(file, mapping, pos, len, flags, pagep, | |
701 | fsdata); | |
702 | if (ret) { | |
703 | EXOFS_DBGMSG("simple_write_begin faild\n"); | |
704 | return ret; | |
705 | } | |
706 | ||
707 | page = *pagep; | |
708 | } | |
709 | ||
710 | /* read modify write */ | |
711 | if (!PageUptodate(page) && (len != PAGE_CACHE_SIZE)) { | |
712 | ret = _readpage(page, true); | |
713 | if (ret) { | |
714 | /*SetPageError was done by _readpage. Is it ok?*/ | |
715 | unlock_page(page); | |
716 | EXOFS_DBGMSG("__readpage_filler faild\n"); | |
717 | } | |
718 | } | |
719 | ||
720 | return ret; | |
721 | } | |
722 | ||
723 | static int exofs_write_begin_export(struct file *file, | |
724 | struct address_space *mapping, | |
725 | loff_t pos, unsigned len, unsigned flags, | |
726 | struct page **pagep, void **fsdata) | |
727 | { | |
728 | *pagep = NULL; | |
729 | ||
730 | return exofs_write_begin(file, mapping, pos, len, flags, pagep, | |
731 | fsdata); | |
732 | } | |
733 | ||
734 | const struct address_space_operations exofs_aops = { | |
735 | .readpage = exofs_readpage, | |
736 | .readpages = exofs_readpages, | |
737 | .writepage = exofs_writepage, | |
738 | .writepages = exofs_writepages, | |
739 | .write_begin = exofs_write_begin_export, | |
740 | .write_end = simple_write_end, | |
741 | }; | |
742 | ||
e8062719 BH |
743 | /****************************************************************************** |
744 | * INODE OPERATIONS | |
745 | *****************************************************************************/ | |
746 | ||
747 | /* | |
748 | * Test whether an inode is a fast symlink. | |
749 | */ | |
750 | static inline int exofs_inode_is_fast_symlink(struct inode *inode) | |
751 | { | |
752 | struct exofs_i_info *oi = exofs_i(inode); | |
753 | ||
754 | return S_ISLNK(inode->i_mode) && (oi->i_data[0] != 0); | |
755 | } | |
756 | ||
757 | /* | |
758 | * get_block_t - Fill in a buffer_head | |
759 | * An OSD takes care of block allocation so we just fake an allocation by | |
760 | * putting in the inode's sector_t in the buffer_head. | |
761 | * TODO: What about the case of create==0 and @iblock does not exist in the | |
762 | * object? | |
763 | */ | |
764 | static int exofs_get_block(struct inode *inode, sector_t iblock, | |
765 | struct buffer_head *bh_result, int create) | |
766 | { | |
767 | map_bh(bh_result, inode->i_sb, iblock); | |
768 | return 0; | |
769 | } | |
770 | ||
771 | const struct osd_attr g_attr_logical_length = ATTR_DEF( | |
772 | OSD_APAGE_OBJECT_INFORMATION, OSD_ATTR_OI_LOGICAL_LENGTH, 8); | |
773 | ||
774 | /* | |
775 | * Truncate a file to the specified size - all we have to do is set the size | |
776 | * attribute. We make sure the object exists first. | |
777 | */ | |
778 | void exofs_truncate(struct inode *inode) | |
779 | { | |
780 | struct exofs_sb_info *sbi = inode->i_sb->s_fs_info; | |
781 | struct exofs_i_info *oi = exofs_i(inode); | |
782 | struct osd_obj_id obj = {sbi->s_pid, inode->i_ino + EXOFS_OBJ_OFF}; | |
783 | struct osd_request *or; | |
784 | struct osd_attr attr; | |
785 | loff_t isize = i_size_read(inode); | |
786 | __be64 newsize; | |
787 | int ret; | |
788 | ||
789 | if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) | |
790 | || S_ISLNK(inode->i_mode))) | |
791 | return; | |
792 | if (exofs_inode_is_fast_symlink(inode)) | |
793 | return; | |
794 | if (IS_APPEND(inode) || IS_IMMUTABLE(inode)) | |
795 | return; | |
796 | inode->i_mtime = inode->i_ctime = CURRENT_TIME; | |
797 | ||
798 | nobh_truncate_page(inode->i_mapping, isize, exofs_get_block); | |
799 | ||
800 | or = osd_start_request(sbi->s_dev, GFP_KERNEL); | |
801 | if (unlikely(!or)) { | |
802 | EXOFS_ERR("ERROR: exofs_truncate: osd_start_request failed\n"); | |
803 | goto fail; | |
804 | } | |
805 | ||
806 | osd_req_set_attributes(or, &obj); | |
807 | ||
808 | newsize = cpu_to_be64((u64)isize); | |
809 | attr = g_attr_logical_length; | |
810 | attr.val_ptr = &newsize; | |
811 | osd_req_add_set_attr_list(or, &attr, 1); | |
812 | ||
813 | /* if we are about to truncate an object, and it hasn't been | |
814 | * created yet, wait | |
815 | */ | |
816 | if (unlikely(wait_obj_created(oi))) | |
817 | goto fail; | |
818 | ||
819 | ret = exofs_sync_op(or, sbi->s_timeout, oi->i_cred); | |
820 | osd_end_request(or); | |
821 | if (ret) | |
822 | goto fail; | |
823 | ||
824 | out: | |
825 | mark_inode_dirty(inode); | |
826 | return; | |
827 | fail: | |
828 | make_bad_inode(inode); | |
829 | goto out; | |
830 | } | |
831 | ||
832 | /* | |
833 | * Set inode attributes - just call generic functions. | |
834 | */ | |
835 | int exofs_setattr(struct dentry *dentry, struct iattr *iattr) | |
836 | { | |
837 | struct inode *inode = dentry->d_inode; | |
838 | int error; | |
839 | ||
840 | error = inode_change_ok(inode, iattr); | |
841 | if (error) | |
842 | return error; | |
843 | ||
844 | error = inode_setattr(inode, iattr); | |
845 | return error; | |
846 | } | |
e6af00f1 BH |
847 | |
848 | /* | |
849 | * Read an inode from the OSD, and return it as is. We also return the size | |
850 | * attribute in the 'sanity' argument if we got compiled with debugging turned | |
851 | * on. | |
852 | */ | |
853 | static int exofs_get_inode(struct super_block *sb, struct exofs_i_info *oi, | |
854 | struct exofs_fcb *inode, uint64_t *sanity) | |
855 | { | |
856 | struct exofs_sb_info *sbi = sb->s_fs_info; | |
857 | struct osd_request *or; | |
858 | struct osd_attr attr; | |
859 | struct osd_obj_id obj = {sbi->s_pid, | |
860 | oi->vfs_inode.i_ino + EXOFS_OBJ_OFF}; | |
861 | int ret; | |
862 | ||
863 | exofs_make_credential(oi->i_cred, &obj); | |
864 | ||
865 | or = osd_start_request(sbi->s_dev, GFP_KERNEL); | |
866 | if (unlikely(!or)) { | |
867 | EXOFS_ERR("exofs_get_inode: osd_start_request failed.\n"); | |
868 | return -ENOMEM; | |
869 | } | |
870 | osd_req_get_attributes(or, &obj); | |
871 | ||
872 | /* we need the inode attribute */ | |
873 | osd_req_add_get_attr_list(or, &g_attr_inode_data, 1); | |
874 | ||
875 | #ifdef EXOFS_DEBUG_OBJ_ISIZE | |
876 | /* we get the size attributes to do a sanity check */ | |
877 | osd_req_add_get_attr_list(or, &g_attr_logical_length, 1); | |
878 | #endif | |
879 | ||
880 | ret = exofs_sync_op(or, sbi->s_timeout, oi->i_cred); | |
881 | if (ret) | |
882 | goto out; | |
883 | ||
884 | attr = g_attr_inode_data; | |
885 | ret = extract_attr_from_req(or, &attr); | |
886 | if (ret) { | |
887 | EXOFS_ERR("exofs_get_inode: extract_attr_from_req failed\n"); | |
888 | goto out; | |
889 | } | |
890 | ||
891 | WARN_ON(attr.len != EXOFS_INO_ATTR_SIZE); | |
892 | memcpy(inode, attr.val_ptr, EXOFS_INO_ATTR_SIZE); | |
893 | ||
894 | #ifdef EXOFS_DEBUG_OBJ_ISIZE | |
895 | attr = g_attr_logical_length; | |
896 | ret = extract_attr_from_req(or, &attr); | |
897 | if (ret) { | |
898 | EXOFS_ERR("ERROR: extract attr from or failed\n"); | |
899 | goto out; | |
900 | } | |
901 | *sanity = get_unaligned_be64(attr.val_ptr); | |
902 | #endif | |
903 | ||
904 | out: | |
905 | osd_end_request(or); | |
906 | return ret; | |
907 | } | |
908 | ||
909 | /* | |
910 | * Fill in an inode read from the OSD and set it up for use | |
911 | */ | |
912 | struct inode *exofs_iget(struct super_block *sb, unsigned long ino) | |
913 | { | |
914 | struct exofs_i_info *oi; | |
915 | struct exofs_fcb fcb; | |
916 | struct inode *inode; | |
917 | uint64_t uninitialized_var(sanity); | |
918 | int ret; | |
919 | ||
920 | inode = iget_locked(sb, ino); | |
921 | if (!inode) | |
922 | return ERR_PTR(-ENOMEM); | |
923 | if (!(inode->i_state & I_NEW)) | |
924 | return inode; | |
925 | oi = exofs_i(inode); | |
926 | ||
927 | /* read the inode from the osd */ | |
928 | ret = exofs_get_inode(sb, oi, &fcb, &sanity); | |
929 | if (ret) | |
930 | goto bad_inode; | |
931 | ||
932 | init_waitqueue_head(&oi->i_wq); | |
933 | set_obj_created(oi); | |
934 | ||
935 | /* copy stuff from on-disk struct to in-memory struct */ | |
936 | inode->i_mode = le16_to_cpu(fcb.i_mode); | |
937 | inode->i_uid = le32_to_cpu(fcb.i_uid); | |
938 | inode->i_gid = le32_to_cpu(fcb.i_gid); | |
939 | inode->i_nlink = le16_to_cpu(fcb.i_links_count); | |
940 | inode->i_ctime.tv_sec = (signed)le32_to_cpu(fcb.i_ctime); | |
941 | inode->i_atime.tv_sec = (signed)le32_to_cpu(fcb.i_atime); | |
942 | inode->i_mtime.tv_sec = (signed)le32_to_cpu(fcb.i_mtime); | |
943 | inode->i_ctime.tv_nsec = | |
944 | inode->i_atime.tv_nsec = inode->i_mtime.tv_nsec = 0; | |
945 | oi->i_commit_size = le64_to_cpu(fcb.i_size); | |
946 | i_size_write(inode, oi->i_commit_size); | |
947 | inode->i_blkbits = EXOFS_BLKSHIFT; | |
948 | inode->i_generation = le32_to_cpu(fcb.i_generation); | |
949 | ||
950 | #ifdef EXOFS_DEBUG_OBJ_ISIZE | |
951 | if ((inode->i_size != sanity) && | |
952 | (!exofs_inode_is_fast_symlink(inode))) { | |
58311c43 | 953 | EXOFS_ERR("WARNING: Size of inode=%llu != object=%llu\n", |
e6af00f1 BH |
954 | inode->i_size, _LLU(sanity)); |
955 | } | |
956 | #endif | |
957 | ||
958 | oi->i_dir_start_lookup = 0; | |
959 | ||
960 | if ((inode->i_nlink == 0) && (inode->i_mode == 0)) { | |
961 | ret = -ESTALE; | |
962 | goto bad_inode; | |
963 | } | |
964 | ||
965 | if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) { | |
966 | if (fcb.i_data[0]) | |
967 | inode->i_rdev = | |
968 | old_decode_dev(le32_to_cpu(fcb.i_data[0])); | |
969 | else | |
970 | inode->i_rdev = | |
971 | new_decode_dev(le32_to_cpu(fcb.i_data[1])); | |
972 | } else { | |
973 | memcpy(oi->i_data, fcb.i_data, sizeof(fcb.i_data)); | |
974 | } | |
975 | ||
976 | if (S_ISREG(inode->i_mode)) { | |
977 | inode->i_op = &exofs_file_inode_operations; | |
978 | inode->i_fop = &exofs_file_operations; | |
979 | inode->i_mapping->a_ops = &exofs_aops; | |
980 | } else if (S_ISDIR(inode->i_mode)) { | |
981 | inode->i_op = &exofs_dir_inode_operations; | |
982 | inode->i_fop = &exofs_dir_operations; | |
983 | inode->i_mapping->a_ops = &exofs_aops; | |
984 | } else if (S_ISLNK(inode->i_mode)) { | |
985 | if (exofs_inode_is_fast_symlink(inode)) | |
986 | inode->i_op = &exofs_fast_symlink_inode_operations; | |
987 | else { | |
988 | inode->i_op = &exofs_symlink_inode_operations; | |
989 | inode->i_mapping->a_ops = &exofs_aops; | |
990 | } | |
991 | } else { | |
992 | inode->i_op = &exofs_special_inode_operations; | |
993 | if (fcb.i_data[0]) | |
994 | init_special_inode(inode, inode->i_mode, | |
995 | old_decode_dev(le32_to_cpu(fcb.i_data[0]))); | |
996 | else | |
997 | init_special_inode(inode, inode->i_mode, | |
998 | new_decode_dev(le32_to_cpu(fcb.i_data[1]))); | |
999 | } | |
1000 | ||
1001 | unlock_new_inode(inode); | |
1002 | return inode; | |
1003 | ||
1004 | bad_inode: | |
1005 | iget_failed(inode); | |
1006 | return ERR_PTR(ret); | |
1007 | } | |
1008 | ||
1009 | int __exofs_wait_obj_created(struct exofs_i_info *oi) | |
1010 | { | |
1011 | if (!obj_created(oi)) { | |
1012 | BUG_ON(!obj_2bcreated(oi)); | |
1013 | wait_event(oi->i_wq, obj_created(oi)); | |
1014 | } | |
1015 | return unlikely(is_bad_inode(&oi->vfs_inode)) ? -EIO : 0; | |
1016 | } | |
1017 | /* | |
1018 | * Callback function from exofs_new_inode(). The important thing is that we | |
1019 | * set the obj_created flag so that other methods know that the object exists on | |
1020 | * the OSD. | |
1021 | */ | |
1022 | static void create_done(struct osd_request *or, void *p) | |
1023 | { | |
1024 | struct inode *inode = p; | |
1025 | struct exofs_i_info *oi = exofs_i(inode); | |
1026 | struct exofs_sb_info *sbi = inode->i_sb->s_fs_info; | |
1027 | int ret; | |
1028 | ||
1029 | ret = exofs_check_ok(or); | |
1030 | osd_end_request(or); | |
1031 | atomic_dec(&sbi->s_curr_pending); | |
1032 | ||
1033 | if (unlikely(ret)) { | |
1034 | EXOFS_ERR("object=0x%llx creation faild in pid=0x%llx", | |
1035 | _LLU(sbi->s_pid), _LLU(inode->i_ino + EXOFS_OBJ_OFF)); | |
1036 | make_bad_inode(inode); | |
1037 | } else | |
1038 | set_obj_created(oi); | |
1039 | ||
1040 | atomic_dec(&inode->i_count); | |
1041 | wake_up(&oi->i_wq); | |
1042 | } | |
1043 | ||
1044 | /* | |
1045 | * Set up a new inode and create an object for it on the OSD | |
1046 | */ | |
1047 | struct inode *exofs_new_inode(struct inode *dir, int mode) | |
1048 | { | |
1049 | struct super_block *sb; | |
1050 | struct inode *inode; | |
1051 | struct exofs_i_info *oi; | |
1052 | struct exofs_sb_info *sbi; | |
1053 | struct osd_request *or; | |
1054 | struct osd_obj_id obj; | |
1055 | int ret; | |
1056 | ||
1057 | sb = dir->i_sb; | |
1058 | inode = new_inode(sb); | |
1059 | if (!inode) | |
1060 | return ERR_PTR(-ENOMEM); | |
1061 | ||
1062 | oi = exofs_i(inode); | |
1063 | ||
1064 | init_waitqueue_head(&oi->i_wq); | |
1065 | set_obj_2bcreated(oi); | |
1066 | ||
1067 | sbi = sb->s_fs_info; | |
1068 | ||
1069 | sb->s_dirt = 1; | |
1070 | inode->i_uid = current->cred->fsuid; | |
1071 | if (dir->i_mode & S_ISGID) { | |
1072 | inode->i_gid = dir->i_gid; | |
1073 | if (S_ISDIR(mode)) | |
1074 | mode |= S_ISGID; | |
1075 | } else { | |
1076 | inode->i_gid = current->cred->fsgid; | |
1077 | } | |
1078 | inode->i_mode = mode; | |
1079 | ||
1080 | inode->i_ino = sbi->s_nextid++; | |
1081 | inode->i_blkbits = EXOFS_BLKSHIFT; | |
1082 | inode->i_mtime = inode->i_atime = inode->i_ctime = CURRENT_TIME; | |
1083 | oi->i_commit_size = inode->i_size = 0; | |
1084 | spin_lock(&sbi->s_next_gen_lock); | |
1085 | inode->i_generation = sbi->s_next_generation++; | |
1086 | spin_unlock(&sbi->s_next_gen_lock); | |
1087 | insert_inode_hash(inode); | |
1088 | ||
1089 | mark_inode_dirty(inode); | |
1090 | ||
1091 | obj.partition = sbi->s_pid; | |
1092 | obj.id = inode->i_ino + EXOFS_OBJ_OFF; | |
1093 | exofs_make_credential(oi->i_cred, &obj); | |
1094 | ||
1095 | or = osd_start_request(sbi->s_dev, GFP_KERNEL); | |
1096 | if (unlikely(!or)) { | |
1097 | EXOFS_ERR("exofs_new_inode: osd_start_request failed\n"); | |
1098 | return ERR_PTR(-ENOMEM); | |
1099 | } | |
1100 | ||
1101 | osd_req_create_object(or, &obj); | |
1102 | ||
1103 | /* increment the refcount so that the inode will still be around when we | |
1104 | * reach the callback | |
1105 | */ | |
1106 | atomic_inc(&inode->i_count); | |
1107 | ||
1108 | ret = exofs_async_op(or, create_done, inode, oi->i_cred); | |
1109 | if (ret) { | |
1110 | atomic_dec(&inode->i_count); | |
1111 | osd_end_request(or); | |
1112 | return ERR_PTR(-EIO); | |
1113 | } | |
1114 | atomic_inc(&sbi->s_curr_pending); | |
1115 | ||
1116 | return inode; | |
1117 | } | |
ba9e5e98 BH |
1118 | |
1119 | /* | |
1120 | * struct to pass two arguments to update_inode's callback | |
1121 | */ | |
1122 | struct updatei_args { | |
1123 | struct exofs_sb_info *sbi; | |
1124 | struct exofs_fcb fcb; | |
1125 | }; | |
1126 | ||
1127 | /* | |
1128 | * Callback function from exofs_update_inode(). | |
1129 | */ | |
1130 | static void updatei_done(struct osd_request *or, void *p) | |
1131 | { | |
1132 | struct updatei_args *args = p; | |
1133 | ||
1134 | osd_end_request(or); | |
1135 | ||
1136 | atomic_dec(&args->sbi->s_curr_pending); | |
1137 | ||
1138 | kfree(args); | |
1139 | } | |
1140 | ||
1141 | /* | |
1142 | * Write the inode to the OSD. Just fill up the struct, and set the attribute | |
1143 | * synchronously or asynchronously depending on the do_sync flag. | |
1144 | */ | |
1145 | static int exofs_update_inode(struct inode *inode, int do_sync) | |
1146 | { | |
1147 | struct exofs_i_info *oi = exofs_i(inode); | |
1148 | struct super_block *sb = inode->i_sb; | |
1149 | struct exofs_sb_info *sbi = sb->s_fs_info; | |
1150 | struct osd_obj_id obj = {sbi->s_pid, inode->i_ino + EXOFS_OBJ_OFF}; | |
1151 | struct osd_request *or; | |
1152 | struct osd_attr attr; | |
1153 | struct exofs_fcb *fcb; | |
1154 | struct updatei_args *args; | |
1155 | int ret; | |
1156 | ||
1157 | args = kzalloc(sizeof(*args), GFP_KERNEL); | |
1158 | if (!args) | |
1159 | return -ENOMEM; | |
1160 | ||
1161 | fcb = &args->fcb; | |
1162 | ||
1163 | fcb->i_mode = cpu_to_le16(inode->i_mode); | |
1164 | fcb->i_uid = cpu_to_le32(inode->i_uid); | |
1165 | fcb->i_gid = cpu_to_le32(inode->i_gid); | |
1166 | fcb->i_links_count = cpu_to_le16(inode->i_nlink); | |
1167 | fcb->i_ctime = cpu_to_le32(inode->i_ctime.tv_sec); | |
1168 | fcb->i_atime = cpu_to_le32(inode->i_atime.tv_sec); | |
1169 | fcb->i_mtime = cpu_to_le32(inode->i_mtime.tv_sec); | |
1170 | oi->i_commit_size = i_size_read(inode); | |
1171 | fcb->i_size = cpu_to_le64(oi->i_commit_size); | |
1172 | fcb->i_generation = cpu_to_le32(inode->i_generation); | |
1173 | ||
1174 | if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) { | |
1175 | if (old_valid_dev(inode->i_rdev)) { | |
1176 | fcb->i_data[0] = | |
1177 | cpu_to_le32(old_encode_dev(inode->i_rdev)); | |
1178 | fcb->i_data[1] = 0; | |
1179 | } else { | |
1180 | fcb->i_data[0] = 0; | |
1181 | fcb->i_data[1] = | |
1182 | cpu_to_le32(new_encode_dev(inode->i_rdev)); | |
1183 | fcb->i_data[2] = 0; | |
1184 | } | |
1185 | } else | |
1186 | memcpy(fcb->i_data, oi->i_data, sizeof(fcb->i_data)); | |
1187 | ||
1188 | or = osd_start_request(sbi->s_dev, GFP_KERNEL); | |
1189 | if (unlikely(!or)) { | |
1190 | EXOFS_ERR("exofs_update_inode: osd_start_request failed.\n"); | |
1191 | ret = -ENOMEM; | |
1192 | goto free_args; | |
1193 | } | |
1194 | ||
1195 | osd_req_set_attributes(or, &obj); | |
1196 | ||
1197 | attr = g_attr_inode_data; | |
1198 | attr.val_ptr = fcb; | |
1199 | osd_req_add_set_attr_list(or, &attr, 1); | |
1200 | ||
1201 | if (!obj_created(oi)) { | |
1202 | EXOFS_DBGMSG("!obj_created\n"); | |
1203 | BUG_ON(!obj_2bcreated(oi)); | |
1204 | wait_event(oi->i_wq, obj_created(oi)); | |
1205 | EXOFS_DBGMSG("wait_event done\n"); | |
1206 | } | |
1207 | ||
1208 | if (do_sync) { | |
1209 | ret = exofs_sync_op(or, sbi->s_timeout, oi->i_cred); | |
1210 | osd_end_request(or); | |
1211 | goto free_args; | |
1212 | } else { | |
1213 | args->sbi = sbi; | |
1214 | ||
1215 | ret = exofs_async_op(or, updatei_done, args, oi->i_cred); | |
1216 | if (ret) { | |
1217 | osd_end_request(or); | |
1218 | goto free_args; | |
1219 | } | |
1220 | atomic_inc(&sbi->s_curr_pending); | |
1221 | goto out; /* deallocation in updatei_done */ | |
1222 | } | |
1223 | ||
1224 | free_args: | |
1225 | kfree(args); | |
1226 | out: | |
1227 | EXOFS_DBGMSG("ret=>%d\n", ret); | |
1228 | return ret; | |
1229 | } | |
1230 | ||
1231 | int exofs_write_inode(struct inode *inode, int wait) | |
1232 | { | |
1233 | return exofs_update_inode(inode, wait); | |
1234 | } | |
1235 | ||
1236 | /* | |
1237 | * Callback function from exofs_delete_inode() - don't have much cleaning up to | |
1238 | * do. | |
1239 | */ | |
1240 | static void delete_done(struct osd_request *or, void *p) | |
1241 | { | |
1242 | struct exofs_sb_info *sbi; | |
1243 | osd_end_request(or); | |
1244 | sbi = p; | |
1245 | atomic_dec(&sbi->s_curr_pending); | |
1246 | } | |
1247 | ||
1248 | /* | |
1249 | * Called when the refcount of an inode reaches zero. We remove the object | |
1250 | * from the OSD here. We make sure the object was created before we try and | |
1251 | * delete it. | |
1252 | */ | |
1253 | void exofs_delete_inode(struct inode *inode) | |
1254 | { | |
1255 | struct exofs_i_info *oi = exofs_i(inode); | |
1256 | struct super_block *sb = inode->i_sb; | |
1257 | struct exofs_sb_info *sbi = sb->s_fs_info; | |
1258 | struct osd_obj_id obj = {sbi->s_pid, inode->i_ino + EXOFS_OBJ_OFF}; | |
1259 | struct osd_request *or; | |
1260 | int ret; | |
1261 | ||
1262 | truncate_inode_pages(&inode->i_data, 0); | |
1263 | ||
1264 | if (is_bad_inode(inode)) | |
1265 | goto no_delete; | |
1266 | ||
1267 | mark_inode_dirty(inode); | |
1268 | exofs_update_inode(inode, inode_needs_sync(inode)); | |
1269 | ||
1270 | inode->i_size = 0; | |
1271 | if (inode->i_blocks) | |
1272 | exofs_truncate(inode); | |
1273 | ||
1274 | clear_inode(inode); | |
1275 | ||
1276 | or = osd_start_request(sbi->s_dev, GFP_KERNEL); | |
1277 | if (unlikely(!or)) { | |
1278 | EXOFS_ERR("exofs_delete_inode: osd_start_request failed\n"); | |
1279 | return; | |
1280 | } | |
1281 | ||
1282 | osd_req_remove_object(or, &obj); | |
1283 | ||
1284 | /* if we are deleting an obj that hasn't been created yet, wait */ | |
1285 | if (!obj_created(oi)) { | |
1286 | BUG_ON(!obj_2bcreated(oi)); | |
1287 | wait_event(oi->i_wq, obj_created(oi)); | |
1288 | } | |
1289 | ||
1290 | ret = exofs_async_op(or, delete_done, sbi, oi->i_cred); | |
1291 | if (ret) { | |
1292 | EXOFS_ERR( | |
1293 | "ERROR: @exofs_delete_inode exofs_async_op failed\n"); | |
1294 | osd_end_request(or); | |
1295 | return; | |
1296 | } | |
1297 | atomic_inc(&sbi->s_curr_pending); | |
1298 | ||
1299 | return; | |
1300 | ||
1301 | no_delete: | |
1302 | clear_inode(inode); | |
1303 | } |