Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * linux/fs/nfs/write.c | |
3 | * | |
7c85d900 | 4 | * Write file data over NFS. |
1da177e4 LT |
5 | * |
6 | * Copyright (C) 1996, 1997, Olaf Kirch <okir@monad.swb.de> | |
7 | */ | |
8 | ||
1da177e4 LT |
9 | #include <linux/types.h> |
10 | #include <linux/slab.h> | |
11 | #include <linux/mm.h> | |
12 | #include <linux/pagemap.h> | |
13 | #include <linux/file.h> | |
1da177e4 | 14 | #include <linux/writeback.h> |
89a09141 | 15 | #include <linux/swap.h> |
074cc1de | 16 | #include <linux/migrate.h> |
1da177e4 LT |
17 | |
18 | #include <linux/sunrpc/clnt.h> | |
19 | #include <linux/nfs_fs.h> | |
20 | #include <linux/nfs_mount.h> | |
21 | #include <linux/nfs_page.h> | |
3fcfab16 | 22 | #include <linux/backing-dev.h> |
afeacc8c | 23 | #include <linux/export.h> |
3fcfab16 | 24 | |
1da177e4 | 25 | #include <asm/uaccess.h> |
1da177e4 LT |
26 | |
27 | #include "delegation.h" | |
49a70f27 | 28 | #include "internal.h" |
91d5b470 | 29 | #include "iostat.h" |
def6ed7e | 30 | #include "nfs4_fs.h" |
074cc1de | 31 | #include "fscache.h" |
94ad1c80 | 32 | #include "pnfs.h" |
1da177e4 LT |
33 | |
34 | #define NFSDBG_FACILITY NFSDBG_PAGECACHE | |
35 | ||
36 | #define MIN_POOL_WRITE (32) | |
37 | #define MIN_POOL_COMMIT (4) | |
38 | ||
39 | /* | |
40 | * Local function declarations | |
41 | */ | |
f8512ad0 | 42 | static void nfs_redirty_request(struct nfs_page *req); |
6c75dc0d | 43 | static const struct rpc_call_ops nfs_write_common_ops; |
788e7a89 | 44 | static const struct rpc_call_ops nfs_commit_ops; |
061ae2ed | 45 | static const struct nfs_pgio_completion_ops nfs_async_write_completion_ops; |
f453a54a | 46 | static const struct nfs_commit_completion_ops nfs_commit_completion_ops; |
1da177e4 | 47 | |
e18b890b | 48 | static struct kmem_cache *nfs_wdata_cachep; |
3feb2d49 | 49 | static mempool_t *nfs_wdata_mempool; |
0b7c0153 | 50 | static struct kmem_cache *nfs_cdata_cachep; |
1da177e4 LT |
51 | static mempool_t *nfs_commit_mempool; |
52 | ||
0b7c0153 | 53 | struct nfs_commit_data *nfs_commitdata_alloc(void) |
1da177e4 | 54 | { |
0b7c0153 | 55 | struct nfs_commit_data *p = mempool_alloc(nfs_commit_mempool, GFP_NOFS); |
40859d7e | 56 | |
1da177e4 LT |
57 | if (p) { |
58 | memset(p, 0, sizeof(*p)); | |
59 | INIT_LIST_HEAD(&p->pages); | |
60 | } | |
61 | return p; | |
62 | } | |
e0c2b380 | 63 | EXPORT_SYMBOL_GPL(nfs_commitdata_alloc); |
1da177e4 | 64 | |
0b7c0153 | 65 | void nfs_commit_free(struct nfs_commit_data *p) |
1da177e4 LT |
66 | { |
67 | mempool_free(p, nfs_commit_mempool); | |
68 | } | |
e0c2b380 | 69 | EXPORT_SYMBOL_GPL(nfs_commit_free); |
1da177e4 | 70 | |
6c75dc0d | 71 | struct nfs_write_header *nfs_writehdr_alloc(void) |
3feb2d49 | 72 | { |
cd841605 | 73 | struct nfs_write_header *p = mempool_alloc(nfs_wdata_mempool, GFP_NOFS); |
3feb2d49 TM |
74 | |
75 | if (p) { | |
cd841605 | 76 | struct nfs_pgio_header *hdr = &p->header; |
cd841605 | 77 | |
3feb2d49 | 78 | memset(p, 0, sizeof(*p)); |
cd841605 | 79 | INIT_LIST_HEAD(&hdr->pages); |
6c75dc0d FI |
80 | INIT_LIST_HEAD(&hdr->rpc_list); |
81 | spin_lock_init(&hdr->lock); | |
82 | atomic_set(&hdr->refcnt, 0); | |
9bce008b | 83 | hdr->verf = &p->verf; |
3feb2d49 TM |
84 | } |
85 | return p; | |
86 | } | |
87 | ||
1763da12 FI |
88 | static struct nfs_write_data *nfs_writedata_alloc(struct nfs_pgio_header *hdr, |
89 | unsigned int pagecount) | |
6c75dc0d FI |
90 | { |
91 | struct nfs_write_data *data, *prealloc; | |
92 | ||
93 | prealloc = &container_of(hdr, struct nfs_write_header, header)->rpc_data; | |
94 | if (prealloc->header == NULL) | |
95 | data = prealloc; | |
96 | else | |
97 | data = kzalloc(sizeof(*data), GFP_KERNEL); | |
98 | if (!data) | |
99 | goto out; | |
100 | ||
101 | if (nfs_pgarray_set(&data->pages, pagecount)) { | |
102 | data->header = hdr; | |
103 | atomic_inc(&hdr->refcnt); | |
104 | } else { | |
105 | if (data != prealloc) | |
106 | kfree(data); | |
107 | data = NULL; | |
108 | } | |
109 | out: | |
110 | return data; | |
111 | } | |
112 | ||
cd841605 | 113 | void nfs_writehdr_free(struct nfs_pgio_header *hdr) |
3feb2d49 | 114 | { |
cd841605 FI |
115 | struct nfs_write_header *whdr = container_of(hdr, struct nfs_write_header, header); |
116 | mempool_free(whdr, nfs_wdata_mempool); | |
3feb2d49 TM |
117 | } |
118 | ||
dce81290 | 119 | void nfs_writedata_release(struct nfs_write_data *wdata) |
1da177e4 | 120 | { |
6c75dc0d FI |
121 | struct nfs_pgio_header *hdr = wdata->header; |
122 | struct nfs_write_header *write_header = container_of(hdr, struct nfs_write_header, header); | |
123 | ||
383ba719 | 124 | put_nfs_open_context(wdata->args.context); |
30dd374f FI |
125 | if (wdata->pages.pagevec != wdata->pages.page_array) |
126 | kfree(wdata->pages.pagevec); | |
6c75dc0d FI |
127 | if (wdata != &write_header->rpc_data) |
128 | kfree(wdata); | |
129 | else | |
130 | wdata->header = NULL; | |
131 | if (atomic_dec_and_test(&hdr->refcnt)) | |
061ae2ed | 132 | hdr->completion_ops->completion(hdr); |
1da177e4 LT |
133 | } |
134 | ||
7b159fc1 TM |
135 | static void nfs_context_set_write_error(struct nfs_open_context *ctx, int error) |
136 | { | |
137 | ctx->error = error; | |
138 | smp_wmb(); | |
139 | set_bit(NFS_CONTEXT_ERROR_WRITE, &ctx->flags); | |
140 | } | |
141 | ||
29418aa4 MG |
142 | static struct nfs_page * |
143 | nfs_page_find_request_locked(struct nfs_inode *nfsi, struct page *page) | |
277459d2 TM |
144 | { |
145 | struct nfs_page *req = NULL; | |
146 | ||
29418aa4 | 147 | if (PagePrivate(page)) |
277459d2 | 148 | req = (struct nfs_page *)page_private(page); |
29418aa4 MG |
149 | else if (unlikely(PageSwapCache(page))) { |
150 | struct nfs_page *freq, *t; | |
151 | ||
152 | /* Linearly search the commit list for the correct req */ | |
153 | list_for_each_entry_safe(freq, t, &nfsi->commit_info.list, wb_list) { | |
154 | if (freq->wb_page == page) { | |
155 | req = freq; | |
156 | break; | |
157 | } | |
158 | } | |
277459d2 | 159 | } |
29418aa4 MG |
160 | |
161 | if (req) | |
162 | kref_get(&req->wb_kref); | |
163 | ||
277459d2 TM |
164 | return req; |
165 | } | |
166 | ||
167 | static struct nfs_page *nfs_page_find_request(struct page *page) | |
168 | { | |
d56b4ddf | 169 | struct inode *inode = page_file_mapping(page)->host; |
277459d2 | 170 | struct nfs_page *req = NULL; |
277459d2 | 171 | |
587142f8 | 172 | spin_lock(&inode->i_lock); |
29418aa4 | 173 | req = nfs_page_find_request_locked(NFS_I(inode), page); |
587142f8 | 174 | spin_unlock(&inode->i_lock); |
277459d2 TM |
175 | return req; |
176 | } | |
177 | ||
1da177e4 LT |
178 | /* Adjust the file length if we're writing beyond the end */ |
179 | static void nfs_grow_file(struct page *page, unsigned int offset, unsigned int count) | |
180 | { | |
d56b4ddf | 181 | struct inode *inode = page_file_mapping(page)->host; |
a3d01454 TM |
182 | loff_t end, i_size; |
183 | pgoff_t end_index; | |
1da177e4 | 184 | |
a3d01454 TM |
185 | spin_lock(&inode->i_lock); |
186 | i_size = i_size_read(inode); | |
187 | end_index = (i_size - 1) >> PAGE_CACHE_SHIFT; | |
d56b4ddf | 188 | if (i_size > 0 && page_file_index(page) < end_index) |
a3d01454 | 189 | goto out; |
d56b4ddf | 190 | end = page_file_offset(page) + ((loff_t)offset+count); |
1da177e4 | 191 | if (i_size >= end) |
a3d01454 | 192 | goto out; |
1da177e4 | 193 | i_size_write(inode, end); |
a3d01454 TM |
194 | nfs_inc_stats(inode, NFSIOS_EXTENDWRITE); |
195 | out: | |
196 | spin_unlock(&inode->i_lock); | |
1da177e4 LT |
197 | } |
198 | ||
a301b777 TM |
199 | /* A writeback failed: mark the page as bad, and invalidate the page cache */ |
200 | static void nfs_set_pageerror(struct page *page) | |
201 | { | |
202 | SetPageError(page); | |
d56b4ddf | 203 | nfs_zap_mapping(page_file_mapping(page)->host, page_file_mapping(page)); |
a301b777 TM |
204 | } |
205 | ||
1da177e4 LT |
206 | /* We can set the PG_uptodate flag if we see that a write request |
207 | * covers the full page. | |
208 | */ | |
209 | static void nfs_mark_uptodate(struct page *page, unsigned int base, unsigned int count) | |
210 | { | |
1da177e4 LT |
211 | if (PageUptodate(page)) |
212 | return; | |
213 | if (base != 0) | |
214 | return; | |
49a70f27 | 215 | if (count != nfs_page_length(page)) |
1da177e4 | 216 | return; |
49a70f27 | 217 | SetPageUptodate(page); |
1da177e4 LT |
218 | } |
219 | ||
1da177e4 LT |
220 | static int wb_priority(struct writeback_control *wbc) |
221 | { | |
222 | if (wbc->for_reclaim) | |
c63c7b05 | 223 | return FLUSH_HIGHPRI | FLUSH_STABLE; |
b17621fe | 224 | if (wbc->for_kupdate || wbc->for_background) |
b31268ac TM |
225 | return FLUSH_LOWPRI | FLUSH_COND_STABLE; |
226 | return FLUSH_COND_STABLE; | |
1da177e4 LT |
227 | } |
228 | ||
89a09141 PZ |
229 | /* |
230 | * NFS congestion control | |
231 | */ | |
232 | ||
233 | int nfs_congestion_kb; | |
234 | ||
235 | #define NFS_CONGESTION_ON_THRESH (nfs_congestion_kb >> (PAGE_SHIFT-10)) | |
236 | #define NFS_CONGESTION_OFF_THRESH \ | |
237 | (NFS_CONGESTION_ON_THRESH - (NFS_CONGESTION_ON_THRESH >> 2)) | |
238 | ||
5a6d41b3 | 239 | static int nfs_set_page_writeback(struct page *page) |
89a09141 | 240 | { |
5a6d41b3 TM |
241 | int ret = test_set_page_writeback(page); |
242 | ||
243 | if (!ret) { | |
d56b4ddf | 244 | struct inode *inode = page_file_mapping(page)->host; |
89a09141 PZ |
245 | struct nfs_server *nfss = NFS_SERVER(inode); |
246 | ||
277866a0 | 247 | if (atomic_long_inc_return(&nfss->writeback) > |
8aa7e847 JA |
248 | NFS_CONGESTION_ON_THRESH) { |
249 | set_bdi_congested(&nfss->backing_dev_info, | |
250 | BLK_RW_ASYNC); | |
251 | } | |
89a09141 | 252 | } |
5a6d41b3 | 253 | return ret; |
89a09141 PZ |
254 | } |
255 | ||
256 | static void nfs_end_page_writeback(struct page *page) | |
257 | { | |
d56b4ddf | 258 | struct inode *inode = page_file_mapping(page)->host; |
89a09141 PZ |
259 | struct nfs_server *nfss = NFS_SERVER(inode); |
260 | ||
261 | end_page_writeback(page); | |
c4dc4bee | 262 | if (atomic_long_dec_return(&nfss->writeback) < NFS_CONGESTION_OFF_THRESH) |
8aa7e847 | 263 | clear_bdi_congested(&nfss->backing_dev_info, BLK_RW_ASYNC); |
89a09141 PZ |
264 | } |
265 | ||
cfb506e1 | 266 | static struct nfs_page *nfs_find_and_lock_request(struct page *page, bool nonblock) |
e261f51f | 267 | { |
d56b4ddf | 268 | struct inode *inode = page_file_mapping(page)->host; |
e261f51f | 269 | struct nfs_page *req; |
e261f51f TM |
270 | int ret; |
271 | ||
587142f8 | 272 | spin_lock(&inode->i_lock); |
074cc1de | 273 | for (;;) { |
29418aa4 | 274 | req = nfs_page_find_request_locked(NFS_I(inode), page); |
074cc1de TM |
275 | if (req == NULL) |
276 | break; | |
7ad84aa9 | 277 | if (nfs_lock_request(req)) |
e261f51f TM |
278 | break; |
279 | /* Note: If we hold the page lock, as is the case in nfs_writepage, | |
7ad84aa9 | 280 | * then the call to nfs_lock_request() will always |
e261f51f TM |
281 | * succeed provided that someone hasn't already marked the |
282 | * request as dirty (in which case we don't care). | |
283 | */ | |
587142f8 | 284 | spin_unlock(&inode->i_lock); |
cfb506e1 TM |
285 | if (!nonblock) |
286 | ret = nfs_wait_on_request(req); | |
287 | else | |
288 | ret = -EAGAIN; | |
e261f51f TM |
289 | nfs_release_request(req); |
290 | if (ret != 0) | |
074cc1de | 291 | return ERR_PTR(ret); |
587142f8 | 292 | spin_lock(&inode->i_lock); |
e261f51f | 293 | } |
587142f8 | 294 | spin_unlock(&inode->i_lock); |
074cc1de TM |
295 | return req; |
296 | } | |
297 | ||
298 | /* | |
299 | * Find an associated nfs write request, and prepare to flush it out | |
300 | * May return an error if the user signalled nfs_wait_on_request(). | |
301 | */ | |
302 | static int nfs_page_async_flush(struct nfs_pageio_descriptor *pgio, | |
cfb506e1 | 303 | struct page *page, bool nonblock) |
074cc1de TM |
304 | { |
305 | struct nfs_page *req; | |
306 | int ret = 0; | |
307 | ||
cfb506e1 | 308 | req = nfs_find_and_lock_request(page, nonblock); |
074cc1de TM |
309 | if (!req) |
310 | goto out; | |
311 | ret = PTR_ERR(req); | |
312 | if (IS_ERR(req)) | |
313 | goto out; | |
314 | ||
315 | ret = nfs_set_page_writeback(page); | |
316 | BUG_ON(ret != 0); | |
317 | BUG_ON(test_bit(PG_CLEAN, &req->wb_flags)); | |
318 | ||
f8512ad0 FI |
319 | if (!nfs_pageio_add_request(pgio, req)) { |
320 | nfs_redirty_request(req); | |
074cc1de | 321 | ret = pgio->pg_error; |
f8512ad0 | 322 | } |
074cc1de TM |
323 | out: |
324 | return ret; | |
e261f51f TM |
325 | } |
326 | ||
f758c885 | 327 | static int nfs_do_writepage(struct page *page, struct writeback_control *wbc, struct nfs_pageio_descriptor *pgio) |
1da177e4 | 328 | { |
d56b4ddf | 329 | struct inode *inode = page_file_mapping(page)->host; |
cfb506e1 | 330 | int ret; |
1da177e4 | 331 | |
91d5b470 CL |
332 | nfs_inc_stats(inode, NFSIOS_VFSWRITEPAGE); |
333 | nfs_add_stats(inode, NFSIOS_WRITEPAGES, 1); | |
334 | ||
d56b4ddf | 335 | nfs_pageio_cond_complete(pgio, page_file_index(page)); |
1b430bee | 336 | ret = nfs_page_async_flush(pgio, page, wbc->sync_mode == WB_SYNC_NONE); |
cfb506e1 TM |
337 | if (ret == -EAGAIN) { |
338 | redirty_page_for_writepage(wbc, page); | |
339 | ret = 0; | |
340 | } | |
341 | return ret; | |
f758c885 | 342 | } |
7fe7f848 | 343 | |
f758c885 TM |
344 | /* |
345 | * Write an mmapped page to the server. | |
346 | */ | |
347 | static int nfs_writepage_locked(struct page *page, struct writeback_control *wbc) | |
348 | { | |
349 | struct nfs_pageio_descriptor pgio; | |
350 | int err; | |
49a70f27 | 351 | |
d56b4ddf | 352 | NFS_PROTO(page_file_mapping(page)->host)->write_pageio_init(&pgio, |
57208fa7 BS |
353 | page->mapping->host, |
354 | wb_priority(wbc), | |
355 | &nfs_async_write_completion_ops); | |
f758c885 TM |
356 | err = nfs_do_writepage(page, wbc, &pgio); |
357 | nfs_pageio_complete(&pgio); | |
358 | if (err < 0) | |
359 | return err; | |
360 | if (pgio.pg_error < 0) | |
361 | return pgio.pg_error; | |
362 | return 0; | |
4d770ccf TM |
363 | } |
364 | ||
365 | int nfs_writepage(struct page *page, struct writeback_control *wbc) | |
366 | { | |
f758c885 | 367 | int ret; |
4d770ccf | 368 | |
f758c885 | 369 | ret = nfs_writepage_locked(page, wbc); |
1da177e4 | 370 | unlock_page(page); |
f758c885 TM |
371 | return ret; |
372 | } | |
373 | ||
374 | static int nfs_writepages_callback(struct page *page, struct writeback_control *wbc, void *data) | |
375 | { | |
376 | int ret; | |
377 | ||
378 | ret = nfs_do_writepage(page, wbc, data); | |
379 | unlock_page(page); | |
380 | return ret; | |
1da177e4 LT |
381 | } |
382 | ||
1da177e4 LT |
383 | int nfs_writepages(struct address_space *mapping, struct writeback_control *wbc) |
384 | { | |
1da177e4 | 385 | struct inode *inode = mapping->host; |
72cb77f4 | 386 | unsigned long *bitlock = &NFS_I(inode)->flags; |
c63c7b05 | 387 | struct nfs_pageio_descriptor pgio; |
1da177e4 LT |
388 | int err; |
389 | ||
72cb77f4 TM |
390 | /* Stop dirtying of new pages while we sync */ |
391 | err = wait_on_bit_lock(bitlock, NFS_INO_FLUSHING, | |
392 | nfs_wait_bit_killable, TASK_KILLABLE); | |
393 | if (err) | |
394 | goto out_err; | |
395 | ||
91d5b470 CL |
396 | nfs_inc_stats(inode, NFSIOS_VFSWRITEPAGES); |
397 | ||
57208fa7 | 398 | NFS_PROTO(inode)->write_pageio_init(&pgio, inode, wb_priority(wbc), &nfs_async_write_completion_ops); |
f758c885 | 399 | err = write_cache_pages(mapping, wbc, nfs_writepages_callback, &pgio); |
c63c7b05 | 400 | nfs_pageio_complete(&pgio); |
72cb77f4 TM |
401 | |
402 | clear_bit_unlock(NFS_INO_FLUSHING, bitlock); | |
403 | smp_mb__after_clear_bit(); | |
404 | wake_up_bit(bitlock, NFS_INO_FLUSHING); | |
405 | ||
f758c885 | 406 | if (err < 0) |
72cb77f4 TM |
407 | goto out_err; |
408 | err = pgio.pg_error; | |
409 | if (err < 0) | |
410 | goto out_err; | |
c63c7b05 | 411 | return 0; |
72cb77f4 TM |
412 | out_err: |
413 | return err; | |
1da177e4 LT |
414 | } |
415 | ||
416 | /* | |
417 | * Insert a write request into an inode | |
418 | */ | |
d6d6dc7c | 419 | static void nfs_inode_add_request(struct inode *inode, struct nfs_page *req) |
1da177e4 LT |
420 | { |
421 | struct nfs_inode *nfsi = NFS_I(inode); | |
e7d39069 TM |
422 | |
423 | /* Lock the request! */ | |
7ad84aa9 | 424 | nfs_lock_request(req); |
e7d39069 TM |
425 | |
426 | spin_lock(&inode->i_lock); | |
011e2a7f | 427 | if (!nfsi->npages && NFS_PROTO(inode)->have_delegation(inode, FMODE_WRITE)) |
a9a4a87a | 428 | inode->i_version++; |
29418aa4 MG |
429 | /* |
430 | * Swap-space should not get truncated. Hence no need to plug the race | |
431 | * with invalidate/truncate. | |
432 | */ | |
433 | if (likely(!PageSwapCache(req->wb_page))) { | |
434 | set_bit(PG_MAPPED, &req->wb_flags); | |
435 | SetPagePrivate(req->wb_page); | |
436 | set_page_private(req->wb_page, (unsigned long)req); | |
437 | } | |
1da177e4 | 438 | nfsi->npages++; |
c03b4024 | 439 | kref_get(&req->wb_kref); |
e7d39069 | 440 | spin_unlock(&inode->i_lock); |
1da177e4 LT |
441 | } |
442 | ||
443 | /* | |
89a09141 | 444 | * Remove a write request from an inode |
1da177e4 LT |
445 | */ |
446 | static void nfs_inode_remove_request(struct nfs_page *req) | |
447 | { | |
3d4ff43d | 448 | struct inode *inode = req->wb_context->dentry->d_inode; |
1da177e4 LT |
449 | struct nfs_inode *nfsi = NFS_I(inode); |
450 | ||
451 | BUG_ON (!NFS_WBACK_BUSY(req)); | |
452 | ||
587142f8 | 453 | spin_lock(&inode->i_lock); |
29418aa4 MG |
454 | if (likely(!PageSwapCache(req->wb_page))) { |
455 | set_page_private(req->wb_page, 0); | |
456 | ClearPagePrivate(req->wb_page); | |
457 | clear_bit(PG_MAPPED, &req->wb_flags); | |
458 | } | |
1da177e4 | 459 | nfsi->npages--; |
4d65c520 | 460 | spin_unlock(&inode->i_lock); |
1da177e4 LT |
461 | nfs_release_request(req); |
462 | } | |
463 | ||
61822ab5 | 464 | static void |
6d884e8f | 465 | nfs_mark_request_dirty(struct nfs_page *req) |
61822ab5 | 466 | { |
61822ab5 TM |
467 | __set_page_dirty_nobuffers(req->wb_page); |
468 | } | |
469 | ||
1da177e4 | 470 | #if defined(CONFIG_NFS_V3) || defined(CONFIG_NFS_V4) |
8dd37758 TM |
471 | /** |
472 | * nfs_request_add_commit_list - add request to a commit list | |
473 | * @req: pointer to a struct nfs_page | |
ea2cf228 FI |
474 | * @dst: commit list head |
475 | * @cinfo: holds list lock and accounting info | |
8dd37758 | 476 | * |
ea2cf228 | 477 | * This sets the PG_CLEAN bit, updates the cinfo count of |
8dd37758 TM |
478 | * number of outstanding requests requiring a commit as well as |
479 | * the MM page stats. | |
480 | * | |
ea2cf228 | 481 | * The caller must _not_ hold the cinfo->lock, but must be |
8dd37758 | 482 | * holding the nfs_page lock. |
1da177e4 | 483 | */ |
8dd37758 | 484 | void |
ea2cf228 FI |
485 | nfs_request_add_commit_list(struct nfs_page *req, struct list_head *dst, |
486 | struct nfs_commit_info *cinfo) | |
1da177e4 | 487 | { |
e468bae9 | 488 | set_bit(PG_CLEAN, &(req)->wb_flags); |
ea2cf228 FI |
489 | spin_lock(cinfo->lock); |
490 | nfs_list_add_request(req, dst); | |
491 | cinfo->mds->ncommit++; | |
492 | spin_unlock(cinfo->lock); | |
56f9cd68 FI |
493 | if (!cinfo->dreq) { |
494 | inc_zone_page_state(req->wb_page, NR_UNSTABLE_NFS); | |
d56b4ddf | 495 | inc_bdi_stat(page_file_mapping(req->wb_page)->backing_dev_info, |
56f9cd68 FI |
496 | BDI_RECLAIMABLE); |
497 | __mark_inode_dirty(req->wb_context->dentry->d_inode, | |
498 | I_DIRTY_DATASYNC); | |
499 | } | |
1da177e4 | 500 | } |
8dd37758 TM |
501 | EXPORT_SYMBOL_GPL(nfs_request_add_commit_list); |
502 | ||
503 | /** | |
504 | * nfs_request_remove_commit_list - Remove request from a commit list | |
505 | * @req: pointer to a nfs_page | |
ea2cf228 | 506 | * @cinfo: holds list lock and accounting info |
8dd37758 | 507 | * |
ea2cf228 | 508 | * This clears the PG_CLEAN bit, and updates the cinfo's count of |
8dd37758 TM |
509 | * number of outstanding requests requiring a commit |
510 | * It does not update the MM page stats. | |
511 | * | |
ea2cf228 | 512 | * The caller _must_ hold the cinfo->lock and the nfs_page lock. |
8dd37758 TM |
513 | */ |
514 | void | |
ea2cf228 FI |
515 | nfs_request_remove_commit_list(struct nfs_page *req, |
516 | struct nfs_commit_info *cinfo) | |
8dd37758 | 517 | { |
8dd37758 TM |
518 | if (!test_and_clear_bit(PG_CLEAN, &(req)->wb_flags)) |
519 | return; | |
520 | nfs_list_remove_request(req); | |
ea2cf228 | 521 | cinfo->mds->ncommit--; |
8dd37758 TM |
522 | } |
523 | EXPORT_SYMBOL_GPL(nfs_request_remove_commit_list); | |
524 | ||
ea2cf228 FI |
525 | static void nfs_init_cinfo_from_inode(struct nfs_commit_info *cinfo, |
526 | struct inode *inode) | |
527 | { | |
528 | cinfo->lock = &inode->i_lock; | |
529 | cinfo->mds = &NFS_I(inode)->commit_info; | |
530 | cinfo->ds = pnfs_get_ds_info(inode); | |
b359f9d0 | 531 | cinfo->dreq = NULL; |
f453a54a | 532 | cinfo->completion_ops = &nfs_commit_completion_ops; |
ea2cf228 FI |
533 | } |
534 | ||
535 | void nfs_init_cinfo(struct nfs_commit_info *cinfo, | |
536 | struct inode *inode, | |
537 | struct nfs_direct_req *dreq) | |
538 | { | |
1763da12 FI |
539 | if (dreq) |
540 | nfs_init_cinfo_from_dreq(cinfo, dreq); | |
541 | else | |
542 | nfs_init_cinfo_from_inode(cinfo, inode); | |
ea2cf228 FI |
543 | } |
544 | EXPORT_SYMBOL_GPL(nfs_init_cinfo); | |
8dd37758 TM |
545 | |
546 | /* | |
547 | * Add a request to the inode's commit list. | |
548 | */ | |
1763da12 | 549 | void |
ea2cf228 FI |
550 | nfs_mark_request_commit(struct nfs_page *req, struct pnfs_layout_segment *lseg, |
551 | struct nfs_commit_info *cinfo) | |
8dd37758 | 552 | { |
ea2cf228 | 553 | if (pnfs_mark_request_commit(req, lseg, cinfo)) |
8dd37758 | 554 | return; |
ea2cf228 | 555 | nfs_request_add_commit_list(req, &cinfo->mds->list, cinfo); |
8dd37758 | 556 | } |
8e821cad | 557 | |
d6d6dc7c FI |
558 | static void |
559 | nfs_clear_page_commit(struct page *page) | |
560 | { | |
561 | dec_zone_page_state(page, NR_UNSTABLE_NFS); | |
d56b4ddf | 562 | dec_bdi_stat(page_file_mapping(page)->backing_dev_info, BDI_RECLAIMABLE); |
d6d6dc7c FI |
563 | } |
564 | ||
8dd37758 | 565 | static void |
e468bae9 TM |
566 | nfs_clear_request_commit(struct nfs_page *req) |
567 | { | |
8dd37758 TM |
568 | if (test_bit(PG_CLEAN, &req->wb_flags)) { |
569 | struct inode *inode = req->wb_context->dentry->d_inode; | |
ea2cf228 | 570 | struct nfs_commit_info cinfo; |
e468bae9 | 571 | |
ea2cf228 FI |
572 | nfs_init_cinfo_from_inode(&cinfo, inode); |
573 | if (!pnfs_clear_request_commit(req, &cinfo)) { | |
574 | spin_lock(cinfo.lock); | |
575 | nfs_request_remove_commit_list(req, &cinfo); | |
576 | spin_unlock(cinfo.lock); | |
8dd37758 | 577 | } |
d6d6dc7c | 578 | nfs_clear_page_commit(req->wb_page); |
e468bae9 | 579 | } |
e468bae9 TM |
580 | } |
581 | ||
8e821cad TM |
582 | static inline |
583 | int nfs_write_need_commit(struct nfs_write_data *data) | |
584 | { | |
465d5243 | 585 | if (data->verf.committed == NFS_DATA_SYNC) |
cd841605 FI |
586 | return data->header->lseg == NULL; |
587 | return data->verf.committed != NFS_FILE_SYNC; | |
8e821cad TM |
588 | } |
589 | ||
8e821cad | 590 | #else |
68cd6fa4 BS |
591 | static void nfs_init_cinfo_from_inode(struct nfs_commit_info *cinfo, |
592 | struct inode *inode) | |
593 | { | |
594 | } | |
595 | ||
596 | void nfs_init_cinfo(struct nfs_commit_info *cinfo, | |
597 | struct inode *inode, | |
598 | struct nfs_direct_req *dreq) | |
599 | { | |
600 | } | |
601 | ||
1763da12 | 602 | void |
ea2cf228 FI |
603 | nfs_mark_request_commit(struct nfs_page *req, struct pnfs_layout_segment *lseg, |
604 | struct nfs_commit_info *cinfo) | |
8e821cad TM |
605 | { |
606 | } | |
607 | ||
8dd37758 | 608 | static void |
e468bae9 TM |
609 | nfs_clear_request_commit(struct nfs_page *req) |
610 | { | |
e468bae9 TM |
611 | } |
612 | ||
8e821cad TM |
613 | static inline |
614 | int nfs_write_need_commit(struct nfs_write_data *data) | |
615 | { | |
616 | return 0; | |
617 | } | |
618 | ||
6c75dc0d FI |
619 | #endif |
620 | ||
061ae2ed | 621 | static void nfs_write_completion(struct nfs_pgio_header *hdr) |
8e821cad | 622 | { |
ea2cf228 | 623 | struct nfs_commit_info cinfo; |
6c75dc0d FI |
624 | unsigned long bytes = 0; |
625 | ||
626 | if (test_bit(NFS_IOHDR_REDO, &hdr->flags)) | |
627 | goto out; | |
ea2cf228 | 628 | nfs_init_cinfo_from_inode(&cinfo, hdr->inode); |
6c75dc0d FI |
629 | while (!list_empty(&hdr->pages)) { |
630 | struct nfs_page *req = nfs_list_entry(hdr->pages.next); | |
6c75dc0d FI |
631 | |
632 | bytes += req->wb_bytes; | |
633 | nfs_list_remove_request(req); | |
634 | if (test_bit(NFS_IOHDR_ERROR, &hdr->flags) && | |
635 | (hdr->good_bytes < bytes)) { | |
d1182b33 | 636 | nfs_set_pageerror(req->wb_page); |
6c75dc0d FI |
637 | nfs_context_set_write_error(req->wb_context, hdr->error); |
638 | goto remove_req; | |
639 | } | |
640 | if (test_bit(NFS_IOHDR_NEED_RESCHED, &hdr->flags)) { | |
641 | nfs_mark_request_dirty(req); | |
642 | goto next; | |
643 | } | |
644 | if (test_bit(NFS_IOHDR_NEED_COMMIT, &hdr->flags)) { | |
2f2c63bc | 645 | memcpy(&req->wb_verf, &hdr->verf->verifier, sizeof(req->wb_verf)); |
ea2cf228 | 646 | nfs_mark_request_commit(req, hdr->lseg, &cinfo); |
6c75dc0d FI |
647 | goto next; |
648 | } | |
649 | remove_req: | |
650 | nfs_inode_remove_request(req); | |
651 | next: | |
1d1afcbc | 652 | nfs_unlock_request(req); |
d1182b33 | 653 | nfs_end_page_writeback(req->wb_page); |
3aff4ebb | 654 | nfs_release_request(req); |
6c75dc0d FI |
655 | } |
656 | out: | |
657 | hdr->release(hdr); | |
8e821cad | 658 | } |
1da177e4 | 659 | |
47c62564 | 660 | #if defined(CONFIG_NFS_V3) || defined(CONFIG_NFS_V4) |
ea2cf228 FI |
661 | static unsigned long |
662 | nfs_reqs_to_commit(struct nfs_commit_info *cinfo) | |
fb8a1f11 | 663 | { |
ea2cf228 | 664 | return cinfo->mds->ncommit; |
d6d6dc7c FI |
665 | } |
666 | ||
ea2cf228 | 667 | /* cinfo->lock held by caller */ |
1763da12 | 668 | int |
ea2cf228 FI |
669 | nfs_scan_commit_list(struct list_head *src, struct list_head *dst, |
670 | struct nfs_commit_info *cinfo, int max) | |
d6d6dc7c FI |
671 | { |
672 | struct nfs_page *req, *tmp; | |
673 | int ret = 0; | |
674 | ||
675 | list_for_each_entry_safe(req, tmp, src, wb_list) { | |
8dd37758 TM |
676 | if (!nfs_lock_request(req)) |
677 | continue; | |
7ad84aa9 | 678 | kref_get(&req->wb_kref); |
ea2cf228 | 679 | if (cond_resched_lock(cinfo->lock)) |
3b3be88d | 680 | list_safe_reset_next(req, tmp, wb_list); |
ea2cf228 | 681 | nfs_request_remove_commit_list(req, cinfo); |
8dd37758 TM |
682 | nfs_list_add_request(req, dst); |
683 | ret++; | |
1763da12 | 684 | if ((ret == max) && !cinfo->dreq) |
8dd37758 | 685 | break; |
d6d6dc7c FI |
686 | } |
687 | return ret; | |
fb8a1f11 TM |
688 | } |
689 | ||
1da177e4 LT |
690 | /* |
691 | * nfs_scan_commit - Scan an inode for commit requests | |
692 | * @inode: NFS inode to scan | |
ea2cf228 FI |
693 | * @dst: mds destination list |
694 | * @cinfo: mds and ds lists of reqs ready to commit | |
1da177e4 LT |
695 | * |
696 | * Moves requests from the inode's 'commit' request list. | |
697 | * The requests are *not* checked to ensure that they form a contiguous set. | |
698 | */ | |
1763da12 | 699 | int |
ea2cf228 FI |
700 | nfs_scan_commit(struct inode *inode, struct list_head *dst, |
701 | struct nfs_commit_info *cinfo) | |
1da177e4 | 702 | { |
d6d6dc7c | 703 | int ret = 0; |
fb8a1f11 | 704 | |
ea2cf228 FI |
705 | spin_lock(cinfo->lock); |
706 | if (cinfo->mds->ncommit > 0) { | |
8dd37758 | 707 | const int max = INT_MAX; |
d6d6dc7c | 708 | |
ea2cf228 FI |
709 | ret = nfs_scan_commit_list(&cinfo->mds->list, dst, |
710 | cinfo, max); | |
711 | ret += pnfs_scan_commit_lists(inode, cinfo, max - ret); | |
d6d6dc7c | 712 | } |
ea2cf228 | 713 | spin_unlock(cinfo->lock); |
ff778d02 | 714 | return ret; |
1da177e4 | 715 | } |
d6d6dc7c | 716 | |
c42de9dd | 717 | #else |
ea2cf228 | 718 | static unsigned long nfs_reqs_to_commit(struct nfs_commit_info *cinfo) |
fb8a1f11 TM |
719 | { |
720 | return 0; | |
721 | } | |
722 | ||
1763da12 FI |
723 | int nfs_scan_commit(struct inode *inode, struct list_head *dst, |
724 | struct nfs_commit_info *cinfo) | |
c42de9dd TM |
725 | { |
726 | return 0; | |
727 | } | |
1da177e4 LT |
728 | #endif |
729 | ||
1da177e4 | 730 | /* |
e7d39069 TM |
731 | * Search for an existing write request, and attempt to update |
732 | * it to reflect a new dirty region on a given page. | |
1da177e4 | 733 | * |
e7d39069 TM |
734 | * If the attempt fails, then the existing request is flushed out |
735 | * to disk. | |
1da177e4 | 736 | */ |
e7d39069 TM |
737 | static struct nfs_page *nfs_try_to_update_request(struct inode *inode, |
738 | struct page *page, | |
739 | unsigned int offset, | |
740 | unsigned int bytes) | |
1da177e4 | 741 | { |
e7d39069 TM |
742 | struct nfs_page *req; |
743 | unsigned int rqend; | |
744 | unsigned int end; | |
745 | int error; | |
746 | ||
747 | if (!PagePrivate(page)) | |
748 | return NULL; | |
1da177e4 LT |
749 | |
750 | end = offset + bytes; | |
e7d39069 | 751 | spin_lock(&inode->i_lock); |
1da177e4 | 752 | |
1da177e4 | 753 | for (;;) { |
29418aa4 | 754 | req = nfs_page_find_request_locked(NFS_I(inode), page); |
e7d39069 TM |
755 | if (req == NULL) |
756 | goto out_unlock; | |
757 | ||
758 | rqend = req->wb_offset + req->wb_bytes; | |
759 | /* | |
760 | * Tell the caller to flush out the request if | |
761 | * the offsets are non-contiguous. | |
762 | * Note: nfs_flush_incompatible() will already | |
763 | * have flushed out requests having wrong owners. | |
764 | */ | |
e468bae9 | 765 | if (offset > rqend |
e7d39069 TM |
766 | || end < req->wb_offset) |
767 | goto out_flushme; | |
768 | ||
7ad84aa9 | 769 | if (nfs_lock_request(req)) |
1da177e4 | 770 | break; |
1da177e4 | 771 | |
e7d39069 | 772 | /* The request is locked, so wait and then retry */ |
587142f8 | 773 | spin_unlock(&inode->i_lock); |
e7d39069 TM |
774 | error = nfs_wait_on_request(req); |
775 | nfs_release_request(req); | |
776 | if (error != 0) | |
777 | goto out_err; | |
778 | spin_lock(&inode->i_lock); | |
1da177e4 LT |
779 | } |
780 | ||
781 | /* Okay, the request matches. Update the region */ | |
782 | if (offset < req->wb_offset) { | |
783 | req->wb_offset = offset; | |
784 | req->wb_pgbase = offset; | |
1da177e4 | 785 | } |
1da177e4 LT |
786 | if (end > rqend) |
787 | req->wb_bytes = end - req->wb_offset; | |
e7d39069 TM |
788 | else |
789 | req->wb_bytes = rqend - req->wb_offset; | |
790 | out_unlock: | |
791 | spin_unlock(&inode->i_lock); | |
ca138f36 FI |
792 | if (req) |
793 | nfs_clear_request_commit(req); | |
e7d39069 TM |
794 | return req; |
795 | out_flushme: | |
796 | spin_unlock(&inode->i_lock); | |
797 | nfs_release_request(req); | |
798 | error = nfs_wb_page(inode, page); | |
799 | out_err: | |
800 | return ERR_PTR(error); | |
801 | } | |
802 | ||
803 | /* | |
804 | * Try to update an existing write request, or create one if there is none. | |
805 | * | |
806 | * Note: Should always be called with the Page Lock held to prevent races | |
807 | * if we have to add a new request. Also assumes that the caller has | |
808 | * already called nfs_flush_incompatible() if necessary. | |
809 | */ | |
810 | static struct nfs_page * nfs_setup_write_request(struct nfs_open_context* ctx, | |
811 | struct page *page, unsigned int offset, unsigned int bytes) | |
812 | { | |
d56b4ddf | 813 | struct inode *inode = page_file_mapping(page)->host; |
e7d39069 | 814 | struct nfs_page *req; |
1da177e4 | 815 | |
e7d39069 TM |
816 | req = nfs_try_to_update_request(inode, page, offset, bytes); |
817 | if (req != NULL) | |
818 | goto out; | |
819 | req = nfs_create_request(ctx, inode, page, offset, bytes); | |
820 | if (IS_ERR(req)) | |
821 | goto out; | |
d6d6dc7c | 822 | nfs_inode_add_request(inode, req); |
efc91ed0 | 823 | out: |
61e930a9 | 824 | return req; |
1da177e4 LT |
825 | } |
826 | ||
e7d39069 TM |
827 | static int nfs_writepage_setup(struct nfs_open_context *ctx, struct page *page, |
828 | unsigned int offset, unsigned int count) | |
829 | { | |
830 | struct nfs_page *req; | |
831 | ||
832 | req = nfs_setup_write_request(ctx, page, offset, count); | |
833 | if (IS_ERR(req)) | |
834 | return PTR_ERR(req); | |
835 | /* Update file length */ | |
836 | nfs_grow_file(page, offset, count); | |
837 | nfs_mark_uptodate(page, req->wb_pgbase, req->wb_bytes); | |
a6305ddb | 838 | nfs_mark_request_dirty(req); |
1d1afcbc | 839 | nfs_unlock_and_release_request(req); |
e7d39069 TM |
840 | return 0; |
841 | } | |
842 | ||
1da177e4 LT |
843 | int nfs_flush_incompatible(struct file *file, struct page *page) |
844 | { | |
cd3758e3 | 845 | struct nfs_open_context *ctx = nfs_file_open_context(file); |
1da177e4 | 846 | struct nfs_page *req; |
1a54533e | 847 | int do_flush, status; |
1da177e4 LT |
848 | /* |
849 | * Look for a request corresponding to this page. If there | |
850 | * is one, and it belongs to another file, we flush it out | |
851 | * before we try to copy anything into the page. Do this | |
852 | * due to the lack of an ACCESS-type call in NFSv2. | |
853 | * Also do the same if we find a request from an existing | |
854 | * dropped page. | |
855 | */ | |
1a54533e TM |
856 | do { |
857 | req = nfs_page_find_request(page); | |
858 | if (req == NULL) | |
859 | return 0; | |
f11ac8db TM |
860 | do_flush = req->wb_page != page || req->wb_context != ctx || |
861 | req->wb_lock_context->lockowner != current->files || | |
862 | req->wb_lock_context->pid != current->tgid; | |
1da177e4 | 863 | nfs_release_request(req); |
1a54533e TM |
864 | if (!do_flush) |
865 | return 0; | |
d56b4ddf | 866 | status = nfs_wb_page(page_file_mapping(page)->host, page); |
1a54533e TM |
867 | } while (status == 0); |
868 | return status; | |
1da177e4 LT |
869 | } |
870 | ||
5d47a356 TM |
871 | /* |
872 | * If the page cache is marked as unsafe or invalid, then we can't rely on | |
873 | * the PageUptodate() flag. In this case, we will need to turn off | |
874 | * write optimisations that depend on the page contents being correct. | |
875 | */ | |
8d197a56 | 876 | static bool nfs_write_pageuptodate(struct page *page, struct inode *inode) |
5d47a356 | 877 | { |
8d197a56 TM |
878 | if (nfs_have_delegated_attributes(inode)) |
879 | goto out; | |
880 | if (NFS_I(inode)->cache_validity & NFS_INO_REVAL_PAGECACHE) | |
881 | return false; | |
882 | out: | |
883 | return PageUptodate(page) != 0; | |
5d47a356 TM |
884 | } |
885 | ||
1da177e4 LT |
886 | /* |
887 | * Update and possibly write a cached page of an NFS file. | |
888 | * | |
889 | * XXX: Keep an eye on generic_file_read to make sure it doesn't do bad | |
890 | * things with a page scheduled for an RPC call (e.g. invalidate it). | |
891 | */ | |
892 | int nfs_updatepage(struct file *file, struct page *page, | |
893 | unsigned int offset, unsigned int count) | |
894 | { | |
cd3758e3 | 895 | struct nfs_open_context *ctx = nfs_file_open_context(file); |
d56b4ddf | 896 | struct inode *inode = page_file_mapping(page)->host; |
1da177e4 LT |
897 | int status = 0; |
898 | ||
91d5b470 CL |
899 | nfs_inc_stats(inode, NFSIOS_VFSUPDATEPAGE); |
900 | ||
48186c7d | 901 | dprintk("NFS: nfs_updatepage(%s/%s %d@%lld)\n", |
01cce933 JJS |
902 | file->f_path.dentry->d_parent->d_name.name, |
903 | file->f_path.dentry->d_name.name, count, | |
d56b4ddf | 904 | (long long)(page_file_offset(page) + offset)); |
1da177e4 | 905 | |
1da177e4 | 906 | /* If we're not using byte range locks, and we know the page |
5d47a356 TM |
907 | * is up to date, it may be more efficient to extend the write |
908 | * to cover the entire page in order to avoid fragmentation | |
909 | * inefficiencies. | |
1da177e4 | 910 | */ |
5d47a356 TM |
911 | if (nfs_write_pageuptodate(page, inode) && |
912 | inode->i_flock == NULL && | |
6b2f3d1f | 913 | !(file->f_flags & O_DSYNC)) { |
49a70f27 | 914 | count = max(count + offset, nfs_page_length(page)); |
1da177e4 | 915 | offset = 0; |
1da177e4 LT |
916 | } |
917 | ||
e21195a7 | 918 | status = nfs_writepage_setup(ctx, page, offset, count); |
03fa9e84 TM |
919 | if (status < 0) |
920 | nfs_set_pageerror(page); | |
59b7c05f TM |
921 | else |
922 | __set_page_dirty_nobuffers(page); | |
1da177e4 | 923 | |
48186c7d | 924 | dprintk("NFS: nfs_updatepage returns %d (isize %lld)\n", |
1da177e4 | 925 | status, (long long)i_size_read(inode)); |
1da177e4 LT |
926 | return status; |
927 | } | |
928 | ||
3ff7576d | 929 | static int flush_task_priority(int how) |
1da177e4 LT |
930 | { |
931 | switch (how & (FLUSH_HIGHPRI|FLUSH_LOWPRI)) { | |
932 | case FLUSH_HIGHPRI: | |
933 | return RPC_PRIORITY_HIGH; | |
934 | case FLUSH_LOWPRI: | |
935 | return RPC_PRIORITY_LOW; | |
936 | } | |
937 | return RPC_PRIORITY_NORMAL; | |
938 | } | |
939 | ||
c5996c4e FI |
940 | int nfs_initiate_write(struct rpc_clnt *clnt, |
941 | struct nfs_write_data *data, | |
d138d5d1 | 942 | const struct rpc_call_ops *call_ops, |
9f0ec176 | 943 | int how, int flags) |
1da177e4 | 944 | { |
cd841605 | 945 | struct inode *inode = data->header->inode; |
3ff7576d | 946 | int priority = flush_task_priority(how); |
07737691 | 947 | struct rpc_task *task; |
bdc7f021 TM |
948 | struct rpc_message msg = { |
949 | .rpc_argp = &data->args, | |
950 | .rpc_resp = &data->res, | |
cd841605 | 951 | .rpc_cred = data->header->cred, |
bdc7f021 | 952 | }; |
84115e1c | 953 | struct rpc_task_setup task_setup_data = { |
d138d5d1 | 954 | .rpc_client = clnt, |
07737691 | 955 | .task = &data->task, |
bdc7f021 | 956 | .rpc_message = &msg, |
84115e1c TM |
957 | .callback_ops = call_ops, |
958 | .callback_data = data, | |
101070ca | 959 | .workqueue = nfsiod_workqueue, |
9f0ec176 | 960 | .flags = RPC_TASK_ASYNC | flags, |
3ff7576d | 961 | .priority = priority, |
84115e1c | 962 | }; |
2c61be0a | 963 | int ret = 0; |
1da177e4 | 964 | |
d138d5d1 AA |
965 | /* Set up the initial task struct. */ |
966 | NFS_PROTO(inode)->write_setup(data, &msg); | |
967 | ||
968 | dprintk("NFS: %5u initiated write call " | |
969 | "(req %s/%lld, %u bytes @ offset %llu)\n", | |
970 | data->task.tk_pid, | |
971 | inode->i_sb->s_id, | |
972 | (long long)NFS_FILEID(inode), | |
973 | data->args.count, | |
974 | (unsigned long long)data->args.offset); | |
975 | ||
976 | task = rpc_run_task(&task_setup_data); | |
977 | if (IS_ERR(task)) { | |
978 | ret = PTR_ERR(task); | |
979 | goto out; | |
980 | } | |
981 | if (how & FLUSH_SYNC) { | |
982 | ret = rpc_wait_for_completion_task(task); | |
983 | if (ret == 0) | |
984 | ret = task->tk_status; | |
985 | } | |
986 | rpc_put_task(task); | |
987 | out: | |
988 | return ret; | |
989 | } | |
a69aef14 | 990 | EXPORT_SYMBOL_GPL(nfs_initiate_write); |
d138d5d1 AA |
991 | |
992 | /* | |
993 | * Set up the argument/result storage required for the RPC call. | |
994 | */ | |
6c75dc0d | 995 | static void nfs_write_rpcsetup(struct nfs_write_data *data, |
d138d5d1 | 996 | unsigned int count, unsigned int offset, |
ea2cf228 | 997 | int how, struct nfs_commit_info *cinfo) |
d138d5d1 | 998 | { |
6c75dc0d | 999 | struct nfs_page *req = data->header->req; |
d138d5d1 | 1000 | |
1da177e4 LT |
1001 | /* Set up the RPC argument and reply structs |
1002 | * NB: take care not to mess about with data->commit et al. */ | |
1003 | ||
6c75dc0d | 1004 | data->args.fh = NFS_FH(data->header->inode); |
1da177e4 | 1005 | data->args.offset = req_offset(req) + offset; |
2bea038c BH |
1006 | /* pnfs_set_layoutcommit needs this */ |
1007 | data->mds_offset = data->args.offset; | |
1da177e4 | 1008 | data->args.pgbase = req->wb_pgbase + offset; |
30dd374f | 1009 | data->args.pages = data->pages.pagevec; |
1da177e4 | 1010 | data->args.count = count; |
383ba719 | 1011 | data->args.context = get_nfs_open_context(req->wb_context); |
f11ac8db | 1012 | data->args.lock_context = req->wb_lock_context; |
bdc7f021 | 1013 | data->args.stable = NFS_UNSTABLE; |
87ed5eb4 TM |
1014 | switch (how & (FLUSH_STABLE | FLUSH_COND_STABLE)) { |
1015 | case 0: | |
1016 | break; | |
1017 | case FLUSH_COND_STABLE: | |
ea2cf228 | 1018 | if (nfs_reqs_to_commit(cinfo)) |
87ed5eb4 TM |
1019 | break; |
1020 | default: | |
1021 | data->args.stable = NFS_FILE_SYNC; | |
bdc7f021 | 1022 | } |
1da177e4 LT |
1023 | |
1024 | data->res.fattr = &data->fattr; | |
1025 | data->res.count = count; | |
1026 | data->res.verf = &data->verf; | |
0e574af1 | 1027 | nfs_fattr_init(&data->fattr); |
6e4efd56 | 1028 | } |
1da177e4 | 1029 | |
6e4efd56 TM |
1030 | static int nfs_do_write(struct nfs_write_data *data, |
1031 | const struct rpc_call_ops *call_ops, | |
6e4efd56 TM |
1032 | int how) |
1033 | { | |
cd841605 | 1034 | struct inode *inode = data->header->inode; |
0382b744 | 1035 | |
9f0ec176 | 1036 | return nfs_initiate_write(NFS_CLIENT(inode), data, call_ops, how, 0); |
1da177e4 LT |
1037 | } |
1038 | ||
275acaaf TM |
1039 | static int nfs_do_multiple_writes(struct list_head *head, |
1040 | const struct rpc_call_ops *call_ops, | |
275acaaf TM |
1041 | int how) |
1042 | { | |
1043 | struct nfs_write_data *data; | |
1044 | int ret = 0; | |
1045 | ||
1046 | while (!list_empty(head)) { | |
1047 | int ret2; | |
1048 | ||
6c75dc0d | 1049 | data = list_first_entry(head, struct nfs_write_data, list); |
275acaaf TM |
1050 | list_del_init(&data->list); |
1051 | ||
dce81290 | 1052 | ret2 = nfs_do_write(data, call_ops, how); |
275acaaf TM |
1053 | if (ret == 0) |
1054 | ret = ret2; | |
1055 | } | |
1056 | return ret; | |
1057 | } | |
1058 | ||
6d884e8f F |
1059 | /* If a nfs_flush_* function fails, it should remove reqs from @head and |
1060 | * call this on each, which will prepare them to be retried on next | |
1061 | * writeback using standard nfs. | |
1062 | */ | |
1063 | static void nfs_redirty_request(struct nfs_page *req) | |
1064 | { | |
1065 | nfs_mark_request_dirty(req); | |
1d1afcbc | 1066 | nfs_unlock_request(req); |
d1182b33 | 1067 | nfs_end_page_writeback(req->wb_page); |
3aff4ebb | 1068 | nfs_release_request(req); |
6d884e8f F |
1069 | } |
1070 | ||
061ae2ed | 1071 | static void nfs_async_write_error(struct list_head *head) |
6c75dc0d FI |
1072 | { |
1073 | struct nfs_page *req; | |
1074 | ||
1075 | while (!list_empty(head)) { | |
1076 | req = nfs_list_entry(head->next); | |
1077 | nfs_list_remove_request(req); | |
1078 | nfs_redirty_request(req); | |
1079 | } | |
1080 | } | |
1081 | ||
061ae2ed FI |
1082 | static const struct nfs_pgio_completion_ops nfs_async_write_completion_ops = { |
1083 | .error_cleanup = nfs_async_write_error, | |
1084 | .completion = nfs_write_completion, | |
1085 | }; | |
1086 | ||
25b11dcd TM |
1087 | static void nfs_flush_error(struct nfs_pageio_descriptor *desc, |
1088 | struct nfs_pgio_header *hdr) | |
1089 | { | |
1090 | set_bit(NFS_IOHDR_REDO, &hdr->flags); | |
1091 | while (!list_empty(&hdr->rpc_list)) { | |
1092 | struct nfs_write_data *data = list_first_entry(&hdr->rpc_list, | |
1093 | struct nfs_write_data, list); | |
1094 | list_del(&data->list); | |
1095 | nfs_writedata_release(data); | |
1096 | } | |
1097 | desc->pg_completion_ops->error_cleanup(&desc->pg_list); | |
1098 | } | |
1099 | ||
1da177e4 LT |
1100 | /* |
1101 | * Generate multiple small requests to write out a single | |
1102 | * contiguous dirty area on one page. | |
1103 | */ | |
6c75dc0d FI |
1104 | static int nfs_flush_multi(struct nfs_pageio_descriptor *desc, |
1105 | struct nfs_pgio_header *hdr) | |
1da177e4 | 1106 | { |
6c75dc0d | 1107 | struct nfs_page *req = hdr->req; |
1da177e4 LT |
1108 | struct page *page = req->wb_page; |
1109 | struct nfs_write_data *data; | |
d097971d | 1110 | size_t wsize = desc->pg_bsize, nbytes; |
e9f7bee1 | 1111 | unsigned int offset; |
1da177e4 | 1112 | int requests = 0; |
ea2cf228 | 1113 | struct nfs_commit_info cinfo; |
1da177e4 | 1114 | |
ea2cf228 | 1115 | nfs_init_cinfo(&cinfo, desc->pg_inode, desc->pg_dreq); |
1da177e4 | 1116 | |
b31268ac | 1117 | if ((desc->pg_ioflags & FLUSH_COND_STABLE) && |
ea2cf228 | 1118 | (desc->pg_moreio || nfs_reqs_to_commit(&cinfo) || |
b31268ac TM |
1119 | desc->pg_count > wsize)) |
1120 | desc->pg_ioflags &= ~FLUSH_COND_STABLE; | |
1121 | ||
1122 | ||
275acaaf | 1123 | offset = 0; |
c76069bd | 1124 | nbytes = desc->pg_count; |
e9f7bee1 TM |
1125 | do { |
1126 | size_t len = min(nbytes, wsize); | |
1127 | ||
6c75dc0d | 1128 | data = nfs_writedata_alloc(hdr, 1); |
25b11dcd TM |
1129 | if (!data) { |
1130 | nfs_flush_error(desc, hdr); | |
1131 | return -ENOMEM; | |
1132 | } | |
30dd374f | 1133 | data->pages.pagevec[0] = page; |
ea2cf228 | 1134 | nfs_write_rpcsetup(data, len, offset, desc->pg_ioflags, &cinfo); |
6c75dc0d | 1135 | list_add(&data->list, &hdr->rpc_list); |
1da177e4 | 1136 | requests++; |
e9f7bee1 | 1137 | nbytes -= len; |
275acaaf | 1138 | offset += len; |
e9f7bee1 | 1139 | } while (nbytes != 0); |
25b11dcd TM |
1140 | nfs_list_remove_request(req); |
1141 | nfs_list_add_request(req, &hdr->pages); | |
6c75dc0d | 1142 | desc->pg_rpc_callops = &nfs_write_common_ops; |
25b11dcd | 1143 | return 0; |
1da177e4 LT |
1144 | } |
1145 | ||
1146 | /* | |
1147 | * Create an RPC task for the given write request and kick it. | |
1148 | * The page must have been locked by the caller. | |
1149 | * | |
1150 | * It may happen that the page we're passed is not marked dirty. | |
1151 | * This is the case if nfs_updatepage detects a conflicting request | |
1152 | * that has been written but not committed. | |
1153 | */ | |
6c75dc0d FI |
1154 | static int nfs_flush_one(struct nfs_pageio_descriptor *desc, |
1155 | struct nfs_pgio_header *hdr) | |
1da177e4 LT |
1156 | { |
1157 | struct nfs_page *req; | |
1158 | struct page **pages; | |
1159 | struct nfs_write_data *data; | |
c76069bd | 1160 | struct list_head *head = &desc->pg_list; |
ea2cf228 | 1161 | struct nfs_commit_info cinfo; |
1da177e4 | 1162 | |
6c75dc0d FI |
1163 | data = nfs_writedata_alloc(hdr, nfs_page_array_len(desc->pg_base, |
1164 | desc->pg_count)); | |
1165 | if (!data) { | |
25b11dcd TM |
1166 | nfs_flush_error(desc, hdr); |
1167 | return -ENOMEM; | |
44b83799 | 1168 | } |
6c75dc0d | 1169 | |
ea2cf228 | 1170 | nfs_init_cinfo(&cinfo, desc->pg_inode, desc->pg_dreq); |
30dd374f | 1171 | pages = data->pages.pagevec; |
1da177e4 LT |
1172 | while (!list_empty(head)) { |
1173 | req = nfs_list_entry(head->next); | |
1174 | nfs_list_remove_request(req); | |
6c75dc0d | 1175 | nfs_list_add_request(req, &hdr->pages); |
1da177e4 | 1176 | *pages++ = req->wb_page; |
1da177e4 | 1177 | } |
1da177e4 | 1178 | |
b31268ac | 1179 | if ((desc->pg_ioflags & FLUSH_COND_STABLE) && |
ea2cf228 | 1180 | (desc->pg_moreio || nfs_reqs_to_commit(&cinfo))) |
b31268ac TM |
1181 | desc->pg_ioflags &= ~FLUSH_COND_STABLE; |
1182 | ||
1da177e4 | 1183 | /* Set up the argument struct */ |
ea2cf228 | 1184 | nfs_write_rpcsetup(data, desc->pg_count, 0, desc->pg_ioflags, &cinfo); |
6c75dc0d FI |
1185 | list_add(&data->list, &hdr->rpc_list); |
1186 | desc->pg_rpc_callops = &nfs_write_common_ops; | |
25b11dcd | 1187 | return 0; |
1da177e4 LT |
1188 | } |
1189 | ||
6c75dc0d FI |
1190 | int nfs_generic_flush(struct nfs_pageio_descriptor *desc, |
1191 | struct nfs_pgio_header *hdr) | |
dce81290 TM |
1192 | { |
1193 | if (desc->pg_bsize < PAGE_CACHE_SIZE) | |
6c75dc0d FI |
1194 | return nfs_flush_multi(desc, hdr); |
1195 | return nfs_flush_one(desc, hdr); | |
dce81290 TM |
1196 | } |
1197 | ||
1198 | static int nfs_generic_pg_writepages(struct nfs_pageio_descriptor *desc) | |
1751c363 | 1199 | { |
6c75dc0d FI |
1200 | struct nfs_write_header *whdr; |
1201 | struct nfs_pgio_header *hdr; | |
275acaaf TM |
1202 | int ret; |
1203 | ||
6c75dc0d FI |
1204 | whdr = nfs_writehdr_alloc(); |
1205 | if (!whdr) { | |
9b5415b5 | 1206 | desc->pg_completion_ops->error_cleanup(&desc->pg_list); |
6c75dc0d FI |
1207 | return -ENOMEM; |
1208 | } | |
1209 | hdr = &whdr->header; | |
1210 | nfs_pgheader_init(desc, hdr, nfs_writehdr_free); | |
1211 | atomic_inc(&hdr->refcnt); | |
1212 | ret = nfs_generic_flush(desc, hdr); | |
50828d7e | 1213 | if (ret == 0) |
6c75dc0d FI |
1214 | ret = nfs_do_multiple_writes(&hdr->rpc_list, |
1215 | desc->pg_rpc_callops, | |
1216 | desc->pg_ioflags); | |
6c75dc0d | 1217 | if (atomic_dec_and_test(&hdr->refcnt)) |
061ae2ed | 1218 | hdr->completion_ops->completion(hdr); |
275acaaf | 1219 | return ret; |
1751c363 | 1220 | } |
1751c363 TM |
1221 | |
1222 | static const struct nfs_pageio_ops nfs_pageio_write_ops = { | |
1223 | .pg_test = nfs_generic_pg_test, | |
1224 | .pg_doio = nfs_generic_pg_writepages, | |
1225 | }; | |
1226 | ||
57208fa7 | 1227 | void nfs_pageio_init_write(struct nfs_pageio_descriptor *pgio, |
061ae2ed FI |
1228 | struct inode *inode, int ioflags, |
1229 | const struct nfs_pgio_completion_ops *compl_ops) | |
1da177e4 | 1230 | { |
061ae2ed | 1231 | nfs_pageio_init(pgio, inode, &nfs_pageio_write_ops, compl_ops, |
1751c363 TM |
1232 | NFS_SERVER(inode)->wsize, ioflags); |
1233 | } | |
1da177e4 | 1234 | |
dce81290 TM |
1235 | void nfs_pageio_reset_write_mds(struct nfs_pageio_descriptor *pgio) |
1236 | { | |
1237 | pgio->pg_ops = &nfs_pageio_write_ops; | |
1238 | pgio->pg_bsize = NFS_SERVER(pgio->pg_inode)->wsize; | |
1239 | } | |
1f945357 | 1240 | EXPORT_SYMBOL_GPL(nfs_pageio_reset_write_mds); |
dce81290 | 1241 | |
1da177e4 | 1242 | |
def6ed7e AA |
1243 | void nfs_write_prepare(struct rpc_task *task, void *calldata) |
1244 | { | |
1245 | struct nfs_write_data *data = calldata; | |
cd841605 | 1246 | NFS_PROTO(data->header->inode)->write_rpc_prepare(task, data); |
def6ed7e | 1247 | } |
def6ed7e | 1248 | |
0b7c0153 FI |
1249 | void nfs_commit_prepare(struct rpc_task *task, void *calldata) |
1250 | { | |
1251 | struct nfs_commit_data *data = calldata; | |
1252 | ||
1253 | NFS_PROTO(data->inode)->commit_rpc_prepare(task, data); | |
1254 | } | |
1255 | ||
1da177e4 LT |
1256 | /* |
1257 | * Handle a write reply that flushes a whole page. | |
1258 | * | |
1259 | * FIXME: There is an inherent race with invalidate_inode_pages and | |
1260 | * writebacks since the page->count is kept > 1 for as long | |
1261 | * as the page has a write request pending. | |
1262 | */ | |
6c75dc0d | 1263 | static void nfs_writeback_done_common(struct rpc_task *task, void *calldata) |
1da177e4 | 1264 | { |
788e7a89 | 1265 | struct nfs_write_data *data = calldata; |
1da177e4 | 1266 | |
c9d8f89d TM |
1267 | nfs_writeback_done(task, data); |
1268 | } | |
1269 | ||
6c75dc0d | 1270 | static void nfs_writeback_release_common(void *calldata) |
c9d8f89d TM |
1271 | { |
1272 | struct nfs_write_data *data = calldata; | |
cd841605 | 1273 | struct nfs_pgio_header *hdr = data->header; |
e2fecb21 | 1274 | int status = data->task.tk_status; |
788e7a89 | 1275 | |
6c75dc0d FI |
1276 | if ((status >= 0) && nfs_write_need_commit(data)) { |
1277 | spin_lock(&hdr->lock); | |
1278 | if (test_bit(NFS_IOHDR_NEED_RESCHED, &hdr->flags)) | |
1279 | ; /* Do nothing */ | |
1280 | else if (!test_and_set_bit(NFS_IOHDR_NEED_COMMIT, &hdr->flags)) | |
9bce008b TM |
1281 | memcpy(hdr->verf, &data->verf, sizeof(*hdr->verf)); |
1282 | else if (memcmp(hdr->verf, &data->verf, sizeof(*hdr->verf))) | |
6c75dc0d FI |
1283 | set_bit(NFS_IOHDR_NEED_RESCHED, &hdr->flags); |
1284 | spin_unlock(&hdr->lock); | |
1da177e4 | 1285 | } |
cd841605 | 1286 | nfs_writedata_release(data); |
1da177e4 LT |
1287 | } |
1288 | ||
6c75dc0d | 1289 | static const struct rpc_call_ops nfs_write_common_ops = { |
def6ed7e | 1290 | .rpc_call_prepare = nfs_write_prepare, |
6c75dc0d FI |
1291 | .rpc_call_done = nfs_writeback_done_common, |
1292 | .rpc_release = nfs_writeback_release_common, | |
788e7a89 TM |
1293 | }; |
1294 | ||
1295 | ||
1da177e4 LT |
1296 | /* |
1297 | * This function is called when the WRITE call is complete. | |
1298 | */ | |
13602896 | 1299 | void nfs_writeback_done(struct rpc_task *task, struct nfs_write_data *data) |
1da177e4 | 1300 | { |
1da177e4 LT |
1301 | struct nfs_writeargs *argp = &data->args; |
1302 | struct nfs_writeres *resp = &data->res; | |
cd841605 | 1303 | struct inode *inode = data->header->inode; |
788e7a89 | 1304 | int status; |
1da177e4 | 1305 | |
a3f565b1 | 1306 | dprintk("NFS: %5u nfs_writeback_done (status %d)\n", |
1da177e4 LT |
1307 | task->tk_pid, task->tk_status); |
1308 | ||
f551e44f CL |
1309 | /* |
1310 | * ->write_done will attempt to use post-op attributes to detect | |
1311 | * conflicting writes by other clients. A strict interpretation | |
1312 | * of close-to-open would allow us to continue caching even if | |
1313 | * another writer had changed the file, but some applications | |
1314 | * depend on tighter cache coherency when writing. | |
1315 | */ | |
cd841605 | 1316 | status = NFS_PROTO(inode)->write_done(task, data); |
788e7a89 | 1317 | if (status != 0) |
13602896 | 1318 | return; |
cd841605 | 1319 | nfs_add_stats(inode, NFSIOS_SERVERWRITTENBYTES, resp->count); |
91d5b470 | 1320 | |
1da177e4 LT |
1321 | #if defined(CONFIG_NFS_V3) || defined(CONFIG_NFS_V4) |
1322 | if (resp->verf->committed < argp->stable && task->tk_status >= 0) { | |
1323 | /* We tried a write call, but the server did not | |
1324 | * commit data to stable storage even though we | |
1325 | * requested it. | |
1326 | * Note: There is a known bug in Tru64 < 5.0 in which | |
1327 | * the server reports NFS_DATA_SYNC, but performs | |
1328 | * NFS_FILE_SYNC. We therefore implement this checking | |
1329 | * as a dprintk() in order to avoid filling syslog. | |
1330 | */ | |
1331 | static unsigned long complain; | |
1332 | ||
a69aef14 | 1333 | /* Note this will print the MDS for a DS write */ |
1da177e4 | 1334 | if (time_before(complain, jiffies)) { |
48186c7d | 1335 | dprintk("NFS: faulty NFS server %s:" |
1da177e4 | 1336 | " (committed = %d) != (stable = %d)\n", |
cd841605 | 1337 | NFS_SERVER(inode)->nfs_client->cl_hostname, |
1da177e4 LT |
1338 | resp->verf->committed, argp->stable); |
1339 | complain = jiffies + 300 * HZ; | |
1340 | } | |
1341 | } | |
1342 | #endif | |
6c75dc0d FI |
1343 | if (task->tk_status < 0) |
1344 | nfs_set_pgio_error(data->header, task->tk_status, argp->offset); | |
1345 | else if (resp->count < argp->count) { | |
1da177e4 LT |
1346 | static unsigned long complain; |
1347 | ||
6c75dc0d | 1348 | /* This a short write! */ |
cd841605 | 1349 | nfs_inc_stats(inode, NFSIOS_SHORTWRITE); |
91d5b470 | 1350 | |
1da177e4 | 1351 | /* Has the server at least made some progress? */ |
6c75dc0d FI |
1352 | if (resp->count == 0) { |
1353 | if (time_before(complain, jiffies)) { | |
1354 | printk(KERN_WARNING | |
1355 | "NFS: Server wrote zero bytes, expected %u.\n", | |
1356 | argp->count); | |
1357 | complain = jiffies + 300 * HZ; | |
1da177e4 | 1358 | } |
6c75dc0d FI |
1359 | nfs_set_pgio_error(data->header, -EIO, argp->offset); |
1360 | task->tk_status = -EIO; | |
13602896 | 1361 | return; |
1da177e4 | 1362 | } |
6c75dc0d FI |
1363 | /* Was this an NFSv2 write or an NFSv3 stable write? */ |
1364 | if (resp->verf->committed != NFS_UNSTABLE) { | |
1365 | /* Resend from where the server left off */ | |
1366 | data->mds_offset += resp->count; | |
1367 | argp->offset += resp->count; | |
1368 | argp->pgbase += resp->count; | |
1369 | argp->count -= resp->count; | |
1370 | } else { | |
1371 | /* Resend as a stable write in order to avoid | |
1372 | * headaches in the case of a server crash. | |
1373 | */ | |
1374 | argp->stable = NFS_FILE_SYNC; | |
1da177e4 | 1375 | } |
6c75dc0d | 1376 | rpc_restart_call_prepare(task); |
1da177e4 | 1377 | } |
1da177e4 LT |
1378 | } |
1379 | ||
1380 | ||
1381 | #if defined(CONFIG_NFS_V3) || defined(CONFIG_NFS_V4) | |
71d0a611 TM |
1382 | static int nfs_commit_set_lock(struct nfs_inode *nfsi, int may_wait) |
1383 | { | |
b8413f98 TM |
1384 | int ret; |
1385 | ||
71d0a611 TM |
1386 | if (!test_and_set_bit(NFS_INO_COMMIT, &nfsi->flags)) |
1387 | return 1; | |
b8413f98 TM |
1388 | if (!may_wait) |
1389 | return 0; | |
1390 | ret = out_of_line_wait_on_bit_lock(&nfsi->flags, | |
1391 | NFS_INO_COMMIT, | |
1392 | nfs_wait_bit_killable, | |
1393 | TASK_KILLABLE); | |
1394 | return (ret < 0) ? ret : 1; | |
71d0a611 TM |
1395 | } |
1396 | ||
f453a54a | 1397 | static void nfs_commit_clear_lock(struct nfs_inode *nfsi) |
71d0a611 TM |
1398 | { |
1399 | clear_bit(NFS_INO_COMMIT, &nfsi->flags); | |
1400 | smp_mb__after_clear_bit(); | |
1401 | wake_up_bit(&nfsi->flags, NFS_INO_COMMIT); | |
1402 | } | |
1403 | ||
0b7c0153 | 1404 | void nfs_commitdata_release(struct nfs_commit_data *data) |
1da177e4 | 1405 | { |
0b7c0153 FI |
1406 | put_nfs_open_context(data->context); |
1407 | nfs_commit_free(data); | |
1da177e4 | 1408 | } |
e0c2b380 | 1409 | EXPORT_SYMBOL_GPL(nfs_commitdata_release); |
1da177e4 | 1410 | |
0b7c0153 | 1411 | int nfs_initiate_commit(struct rpc_clnt *clnt, struct nfs_commit_data *data, |
9ace33cd | 1412 | const struct rpc_call_ops *call_ops, |
9f0ec176 | 1413 | int how, int flags) |
1da177e4 | 1414 | { |
07737691 | 1415 | struct rpc_task *task; |
9ace33cd | 1416 | int priority = flush_task_priority(how); |
bdc7f021 TM |
1417 | struct rpc_message msg = { |
1418 | .rpc_argp = &data->args, | |
1419 | .rpc_resp = &data->res, | |
9ace33cd | 1420 | .rpc_cred = data->cred, |
bdc7f021 | 1421 | }; |
84115e1c | 1422 | struct rpc_task_setup task_setup_data = { |
07737691 | 1423 | .task = &data->task, |
9ace33cd | 1424 | .rpc_client = clnt, |
bdc7f021 | 1425 | .rpc_message = &msg, |
9ace33cd | 1426 | .callback_ops = call_ops, |
84115e1c | 1427 | .callback_data = data, |
101070ca | 1428 | .workqueue = nfsiod_workqueue, |
9f0ec176 | 1429 | .flags = RPC_TASK_ASYNC | flags, |
3ff7576d | 1430 | .priority = priority, |
84115e1c | 1431 | }; |
9ace33cd FI |
1432 | /* Set up the initial task struct. */ |
1433 | NFS_PROTO(data->inode)->commit_setup(data, &msg); | |
1434 | ||
1435 | dprintk("NFS: %5u initiated commit call\n", data->task.tk_pid); | |
1436 | ||
1437 | task = rpc_run_task(&task_setup_data); | |
1438 | if (IS_ERR(task)) | |
1439 | return PTR_ERR(task); | |
1440 | if (how & FLUSH_SYNC) | |
1441 | rpc_wait_for_completion_task(task); | |
1442 | rpc_put_task(task); | |
1443 | return 0; | |
1444 | } | |
e0c2b380 | 1445 | EXPORT_SYMBOL_GPL(nfs_initiate_commit); |
9ace33cd FI |
1446 | |
1447 | /* | |
1448 | * Set up the argument/result storage required for the RPC call. | |
1449 | */ | |
0b7c0153 | 1450 | void nfs_init_commit(struct nfs_commit_data *data, |
f453a54a FI |
1451 | struct list_head *head, |
1452 | struct pnfs_layout_segment *lseg, | |
1453 | struct nfs_commit_info *cinfo) | |
9ace33cd FI |
1454 | { |
1455 | struct nfs_page *first = nfs_list_entry(head->next); | |
3d4ff43d | 1456 | struct inode *inode = first->wb_context->dentry->d_inode; |
1da177e4 LT |
1457 | |
1458 | /* Set up the RPC argument and reply structs | |
1459 | * NB: take care not to mess about with data->commit et al. */ | |
1460 | ||
1461 | list_splice_init(head, &data->pages); | |
1da177e4 | 1462 | |
1da177e4 | 1463 | data->inode = inode; |
9ace33cd | 1464 | data->cred = first->wb_context->cred; |
988b6dce | 1465 | data->lseg = lseg; /* reference transferred */ |
9ace33cd | 1466 | data->mds_ops = &nfs_commit_ops; |
f453a54a | 1467 | data->completion_ops = cinfo->completion_ops; |
b359f9d0 | 1468 | data->dreq = cinfo->dreq; |
1da177e4 LT |
1469 | |
1470 | data->args.fh = NFS_FH(data->inode); | |
3da28eb1 TM |
1471 | /* Note: we always request a commit of the entire inode */ |
1472 | data->args.offset = 0; | |
1473 | data->args.count = 0; | |
0b7c0153 | 1474 | data->context = get_nfs_open_context(first->wb_context); |
1da177e4 LT |
1475 | data->res.fattr = &data->fattr; |
1476 | data->res.verf = &data->verf; | |
0e574af1 | 1477 | nfs_fattr_init(&data->fattr); |
1da177e4 | 1478 | } |
e0c2b380 | 1479 | EXPORT_SYMBOL_GPL(nfs_init_commit); |
1da177e4 | 1480 | |
e0c2b380 | 1481 | void nfs_retry_commit(struct list_head *page_list, |
ea2cf228 FI |
1482 | struct pnfs_layout_segment *lseg, |
1483 | struct nfs_commit_info *cinfo) | |
64bfeb49 FI |
1484 | { |
1485 | struct nfs_page *req; | |
1486 | ||
1487 | while (!list_empty(page_list)) { | |
1488 | req = nfs_list_entry(page_list->next); | |
1489 | nfs_list_remove_request(req); | |
ea2cf228 | 1490 | nfs_mark_request_commit(req, lseg, cinfo); |
56f9cd68 FI |
1491 | if (!cinfo->dreq) { |
1492 | dec_zone_page_state(req->wb_page, NR_UNSTABLE_NFS); | |
d56b4ddf | 1493 | dec_bdi_stat(page_file_mapping(req->wb_page)->backing_dev_info, |
56f9cd68 FI |
1494 | BDI_RECLAIMABLE); |
1495 | } | |
1d1afcbc | 1496 | nfs_unlock_and_release_request(req); |
64bfeb49 FI |
1497 | } |
1498 | } | |
e0c2b380 | 1499 | EXPORT_SYMBOL_GPL(nfs_retry_commit); |
64bfeb49 | 1500 | |
1da177e4 LT |
1501 | /* |
1502 | * Commit dirty pages | |
1503 | */ | |
1504 | static int | |
ea2cf228 FI |
1505 | nfs_commit_list(struct inode *inode, struct list_head *head, int how, |
1506 | struct nfs_commit_info *cinfo) | |
1da177e4 | 1507 | { |
0b7c0153 | 1508 | struct nfs_commit_data *data; |
1da177e4 | 1509 | |
c9d8f89d | 1510 | data = nfs_commitdata_alloc(); |
1da177e4 LT |
1511 | |
1512 | if (!data) | |
1513 | goto out_bad; | |
1514 | ||
1515 | /* Set up the argument struct */ | |
f453a54a FI |
1516 | nfs_init_commit(data, head, NULL, cinfo); |
1517 | atomic_inc(&cinfo->mds->rpcs_out); | |
9f0ec176 AA |
1518 | return nfs_initiate_commit(NFS_CLIENT(inode), data, data->mds_ops, |
1519 | how, 0); | |
1da177e4 | 1520 | out_bad: |
ea2cf228 | 1521 | nfs_retry_commit(head, NULL, cinfo); |
f453a54a | 1522 | cinfo->completion_ops->error_cleanup(NFS_I(inode)); |
1da177e4 LT |
1523 | return -ENOMEM; |
1524 | } | |
1525 | ||
1526 | /* | |
1527 | * COMMIT call returned | |
1528 | */ | |
788e7a89 | 1529 | static void nfs_commit_done(struct rpc_task *task, void *calldata) |
1da177e4 | 1530 | { |
0b7c0153 | 1531 | struct nfs_commit_data *data = calldata; |
1da177e4 | 1532 | |
a3f565b1 | 1533 | dprintk("NFS: %5u nfs_commit_done (status %d)\n", |
1da177e4 LT |
1534 | task->tk_pid, task->tk_status); |
1535 | ||
788e7a89 | 1536 | /* Call the NFS version-specific code */ |
c0d0e96b | 1537 | NFS_PROTO(data->inode)->commit_done(task, data); |
c9d8f89d TM |
1538 | } |
1539 | ||
f453a54a | 1540 | static void nfs_commit_release_pages(struct nfs_commit_data *data) |
c9d8f89d | 1541 | { |
5917ce84 | 1542 | struct nfs_page *req; |
c9d8f89d | 1543 | int status = data->task.tk_status; |
f453a54a | 1544 | struct nfs_commit_info cinfo; |
788e7a89 | 1545 | |
1da177e4 LT |
1546 | while (!list_empty(&data->pages)) { |
1547 | req = nfs_list_entry(data->pages.next); | |
1548 | nfs_list_remove_request(req); | |
d6d6dc7c | 1549 | nfs_clear_page_commit(req->wb_page); |
1da177e4 | 1550 | |
48186c7d | 1551 | dprintk("NFS: commit (%s/%lld %d@%lld)", |
3d4ff43d AV |
1552 | req->wb_context->dentry->d_sb->s_id, |
1553 | (long long)NFS_FILEID(req->wb_context->dentry->d_inode), | |
1da177e4 LT |
1554 | req->wb_bytes, |
1555 | (long long)req_offset(req)); | |
c9d8f89d TM |
1556 | if (status < 0) { |
1557 | nfs_context_set_write_error(req->wb_context, status); | |
1da177e4 | 1558 | nfs_inode_remove_request(req); |
c9d8f89d | 1559 | dprintk(", error = %d\n", status); |
1da177e4 LT |
1560 | goto next; |
1561 | } | |
1562 | ||
1563 | /* Okay, COMMIT succeeded, apparently. Check the verifier | |
1564 | * returned by the server against all stored verfs. */ | |
2f2c63bc | 1565 | if (!memcmp(&req->wb_verf, &data->verf.verifier, sizeof(req->wb_verf))) { |
1da177e4 LT |
1566 | /* We have a match */ |
1567 | nfs_inode_remove_request(req); | |
1568 | dprintk(" OK\n"); | |
1569 | goto next; | |
1570 | } | |
1571 | /* We have a mismatch. Write the page again */ | |
1572 | dprintk(" mismatch\n"); | |
6d884e8f | 1573 | nfs_mark_request_dirty(req); |
1da177e4 | 1574 | next: |
1d1afcbc | 1575 | nfs_unlock_and_release_request(req); |
1da177e4 | 1576 | } |
f453a54a FI |
1577 | nfs_init_cinfo(&cinfo, data->inode, data->dreq); |
1578 | if (atomic_dec_and_test(&cinfo.mds->rpcs_out)) | |
1579 | nfs_commit_clear_lock(NFS_I(data->inode)); | |
5917ce84 FI |
1580 | } |
1581 | ||
1582 | static void nfs_commit_release(void *calldata) | |
1583 | { | |
0b7c0153 | 1584 | struct nfs_commit_data *data = calldata; |
5917ce84 | 1585 | |
f453a54a | 1586 | data->completion_ops->completion(data); |
c9d8f89d | 1587 | nfs_commitdata_release(calldata); |
1da177e4 | 1588 | } |
788e7a89 TM |
1589 | |
1590 | static const struct rpc_call_ops nfs_commit_ops = { | |
0b7c0153 | 1591 | .rpc_call_prepare = nfs_commit_prepare, |
788e7a89 TM |
1592 | .rpc_call_done = nfs_commit_done, |
1593 | .rpc_release = nfs_commit_release, | |
1594 | }; | |
1da177e4 | 1595 | |
f453a54a FI |
1596 | static const struct nfs_commit_completion_ops nfs_commit_completion_ops = { |
1597 | .completion = nfs_commit_release_pages, | |
1598 | .error_cleanup = nfs_commit_clear_lock, | |
1599 | }; | |
1600 | ||
1763da12 FI |
1601 | int nfs_generic_commit_list(struct inode *inode, struct list_head *head, |
1602 | int how, struct nfs_commit_info *cinfo) | |
84c53ab5 FI |
1603 | { |
1604 | int status; | |
1605 | ||
ea2cf228 | 1606 | status = pnfs_commit_list(inode, head, how, cinfo); |
84c53ab5 | 1607 | if (status == PNFS_NOT_ATTEMPTED) |
ea2cf228 | 1608 | status = nfs_commit_list(inode, head, how, cinfo); |
84c53ab5 FI |
1609 | return status; |
1610 | } | |
1611 | ||
b608b283 | 1612 | int nfs_commit_inode(struct inode *inode, int how) |
1da177e4 | 1613 | { |
1da177e4 | 1614 | LIST_HEAD(head); |
ea2cf228 | 1615 | struct nfs_commit_info cinfo; |
71d0a611 | 1616 | int may_wait = how & FLUSH_SYNC; |
b8413f98 | 1617 | int res; |
1da177e4 | 1618 | |
b8413f98 TM |
1619 | res = nfs_commit_set_lock(NFS_I(inode), may_wait); |
1620 | if (res <= 0) | |
c5efa5fc | 1621 | goto out_mark_dirty; |
ea2cf228 FI |
1622 | nfs_init_cinfo_from_inode(&cinfo, inode); |
1623 | res = nfs_scan_commit(inode, &head, &cinfo); | |
1da177e4 | 1624 | if (res) { |
a861a1e1 FI |
1625 | int error; |
1626 | ||
ea2cf228 | 1627 | error = nfs_generic_commit_list(inode, &head, how, &cinfo); |
3da28eb1 TM |
1628 | if (error < 0) |
1629 | return error; | |
b8413f98 | 1630 | if (!may_wait) |
c5efa5fc | 1631 | goto out_mark_dirty; |
b8413f98 TM |
1632 | error = wait_on_bit(&NFS_I(inode)->flags, |
1633 | NFS_INO_COMMIT, | |
1634 | nfs_wait_bit_killable, | |
1635 | TASK_KILLABLE); | |
1636 | if (error < 0) | |
1637 | return error; | |
71d0a611 TM |
1638 | } else |
1639 | nfs_commit_clear_lock(NFS_I(inode)); | |
c5efa5fc TM |
1640 | return res; |
1641 | /* Note: If we exit without ensuring that the commit is complete, | |
1642 | * we must mark the inode as dirty. Otherwise, future calls to | |
1643 | * sync_inode() with the WB_SYNC_ALL flag set will fail to ensure | |
1644 | * that the data is on the disk. | |
1645 | */ | |
1646 | out_mark_dirty: | |
1647 | __mark_inode_dirty(inode, I_DIRTY_DATASYNC); | |
1da177e4 LT |
1648 | return res; |
1649 | } | |
8fc795f7 TM |
1650 | |
1651 | static int nfs_commit_unstable_pages(struct inode *inode, struct writeback_control *wbc) | |
1652 | { | |
420e3646 TM |
1653 | struct nfs_inode *nfsi = NFS_I(inode); |
1654 | int flags = FLUSH_SYNC; | |
1655 | int ret = 0; | |
8fc795f7 | 1656 | |
3236c3e1 | 1657 | /* no commits means nothing needs to be done */ |
ea2cf228 | 1658 | if (!nfsi->commit_info.ncommit) |
3236c3e1 JL |
1659 | return ret; |
1660 | ||
a00dd6c0 JL |
1661 | if (wbc->sync_mode == WB_SYNC_NONE) { |
1662 | /* Don't commit yet if this is a non-blocking flush and there | |
1663 | * are a lot of outstanding writes for this mapping. | |
1664 | */ | |
ea2cf228 | 1665 | if (nfsi->commit_info.ncommit <= (nfsi->npages >> 1)) |
a00dd6c0 | 1666 | goto out_mark_dirty; |
420e3646 | 1667 | |
a00dd6c0 | 1668 | /* don't wait for the COMMIT response */ |
420e3646 | 1669 | flags = 0; |
a00dd6c0 JL |
1670 | } |
1671 | ||
420e3646 TM |
1672 | ret = nfs_commit_inode(inode, flags); |
1673 | if (ret >= 0) { | |
1674 | if (wbc->sync_mode == WB_SYNC_NONE) { | |
1675 | if (ret < wbc->nr_to_write) | |
1676 | wbc->nr_to_write -= ret; | |
1677 | else | |
1678 | wbc->nr_to_write = 0; | |
1679 | } | |
8fc795f7 | 1680 | return 0; |
420e3646 TM |
1681 | } |
1682 | out_mark_dirty: | |
8fc795f7 TM |
1683 | __mark_inode_dirty(inode, I_DIRTY_DATASYNC); |
1684 | return ret; | |
1685 | } | |
c63c7b05 | 1686 | #else |
8fc795f7 TM |
1687 | static int nfs_commit_unstable_pages(struct inode *inode, struct writeback_control *wbc) |
1688 | { | |
1689 | return 0; | |
1690 | } | |
1da177e4 LT |
1691 | #endif |
1692 | ||
8fc795f7 TM |
1693 | int nfs_write_inode(struct inode *inode, struct writeback_control *wbc) |
1694 | { | |
a8d8f02c BS |
1695 | return nfs_commit_unstable_pages(inode, wbc); |
1696 | } | |
1697 | ||
1698 | #ifdef CONFIG_NFS_V4 | |
1699 | int nfs4_write_inode(struct inode *inode, struct writeback_control *wbc) | |
1700 | { | |
1701 | int ret = nfs_write_inode(inode, wbc); | |
863a3c6c | 1702 | |
863a3c6c | 1703 | if (ret >= 0 && test_bit(NFS_INO_LAYOUTCOMMIT, &NFS_I(inode)->flags)) { |
ef311537 AA |
1704 | int status; |
1705 | bool sync = true; | |
863a3c6c | 1706 | |
846d5a09 | 1707 | if (wbc->sync_mode == WB_SYNC_NONE) |
ef311537 | 1708 | sync = false; |
863a3c6c AA |
1709 | |
1710 | status = pnfs_layoutcommit_inode(inode, sync); | |
1711 | if (status < 0) | |
1712 | return status; | |
1713 | } | |
1714 | return ret; | |
8fc795f7 | 1715 | } |
a8d8f02c | 1716 | #endif |
8fc795f7 | 1717 | |
acdc53b2 TM |
1718 | /* |
1719 | * flush the inode to disk. | |
1720 | */ | |
1721 | int nfs_wb_all(struct inode *inode) | |
34901f70 TM |
1722 | { |
1723 | struct writeback_control wbc = { | |
72cb77f4 | 1724 | .sync_mode = WB_SYNC_ALL, |
34901f70 | 1725 | .nr_to_write = LONG_MAX, |
d7fb1207 TM |
1726 | .range_start = 0, |
1727 | .range_end = LLONG_MAX, | |
34901f70 | 1728 | }; |
34901f70 | 1729 | |
acdc53b2 | 1730 | return sync_inode(inode, &wbc); |
1c75950b TM |
1731 | } |
1732 | ||
1b3b4a1a TM |
1733 | int nfs_wb_page_cancel(struct inode *inode, struct page *page) |
1734 | { | |
1735 | struct nfs_page *req; | |
1b3b4a1a TM |
1736 | int ret = 0; |
1737 | ||
1738 | BUG_ON(!PageLocked(page)); | |
1739 | for (;;) { | |
ba8b06e6 | 1740 | wait_on_page_writeback(page); |
1b3b4a1a TM |
1741 | req = nfs_page_find_request(page); |
1742 | if (req == NULL) | |
1b3b4a1a | 1743 | break; |
7ad84aa9 | 1744 | if (nfs_lock_request(req)) { |
8dd37758 | 1745 | nfs_clear_request_commit(req); |
1b3b4a1a TM |
1746 | nfs_inode_remove_request(req); |
1747 | /* | |
1748 | * In case nfs_inode_remove_request has marked the | |
1749 | * page as being dirty | |
1750 | */ | |
1751 | cancel_dirty_page(page, PAGE_CACHE_SIZE); | |
1d1afcbc | 1752 | nfs_unlock_and_release_request(req); |
1b3b4a1a TM |
1753 | break; |
1754 | } | |
1755 | ret = nfs_wait_on_request(req); | |
c9edda71 | 1756 | nfs_release_request(req); |
1b3b4a1a | 1757 | if (ret < 0) |
c988950e | 1758 | break; |
1b3b4a1a | 1759 | } |
1b3b4a1a TM |
1760 | return ret; |
1761 | } | |
1762 | ||
7f2f12d9 TM |
1763 | /* |
1764 | * Write back all requests on one page - we do this before reading it. | |
1765 | */ | |
1766 | int nfs_wb_page(struct inode *inode, struct page *page) | |
1c75950b | 1767 | { |
29418aa4 | 1768 | loff_t range_start = page_file_offset(page); |
1c75950b | 1769 | loff_t range_end = range_start + (loff_t)(PAGE_CACHE_SIZE - 1); |
4d770ccf | 1770 | struct writeback_control wbc = { |
4d770ccf | 1771 | .sync_mode = WB_SYNC_ALL, |
7f2f12d9 | 1772 | .nr_to_write = 0, |
4d770ccf TM |
1773 | .range_start = range_start, |
1774 | .range_end = range_end, | |
1775 | }; | |
1776 | int ret; | |
1c75950b | 1777 | |
0522f6ad | 1778 | for (;;) { |
ba8b06e6 | 1779 | wait_on_page_writeback(page); |
73e3302f TM |
1780 | if (clear_page_dirty_for_io(page)) { |
1781 | ret = nfs_writepage_locked(page, &wbc); | |
1782 | if (ret < 0) | |
1783 | goto out_error; | |
0522f6ad | 1784 | continue; |
7f2f12d9 | 1785 | } |
0522f6ad TM |
1786 | if (!PagePrivate(page)) |
1787 | break; | |
1788 | ret = nfs_commit_inode(inode, FLUSH_SYNC); | |
ba8b06e6 | 1789 | if (ret < 0) |
73e3302f | 1790 | goto out_error; |
7f2f12d9 | 1791 | } |
73e3302f TM |
1792 | return 0; |
1793 | out_error: | |
4d770ccf | 1794 | return ret; |
1c75950b TM |
1795 | } |
1796 | ||
074cc1de TM |
1797 | #ifdef CONFIG_MIGRATION |
1798 | int nfs_migrate_page(struct address_space *mapping, struct page *newpage, | |
a6bc32b8 | 1799 | struct page *page, enum migrate_mode mode) |
074cc1de | 1800 | { |
2da95652 JL |
1801 | /* |
1802 | * If PagePrivate is set, then the page is currently associated with | |
1803 | * an in-progress read or write request. Don't try to migrate it. | |
1804 | * | |
1805 | * FIXME: we could do this in principle, but we'll need a way to ensure | |
1806 | * that we can safely release the inode reference while holding | |
1807 | * the page lock. | |
1808 | */ | |
1809 | if (PagePrivate(page)) | |
1810 | return -EBUSY; | |
074cc1de | 1811 | |
7549ad5f | 1812 | nfs_fscache_release_page(page, GFP_KERNEL); |
074cc1de | 1813 | |
a6bc32b8 | 1814 | return migrate_page(mapping, newpage, page, mode); |
074cc1de TM |
1815 | } |
1816 | #endif | |
1817 | ||
f7b422b1 | 1818 | int __init nfs_init_writepagecache(void) |
1da177e4 LT |
1819 | { |
1820 | nfs_wdata_cachep = kmem_cache_create("nfs_write_data", | |
cd841605 | 1821 | sizeof(struct nfs_write_header), |
1da177e4 | 1822 | 0, SLAB_HWCACHE_ALIGN, |
20c2df83 | 1823 | NULL); |
1da177e4 LT |
1824 | if (nfs_wdata_cachep == NULL) |
1825 | return -ENOMEM; | |
1826 | ||
93d2341c MD |
1827 | nfs_wdata_mempool = mempool_create_slab_pool(MIN_POOL_WRITE, |
1828 | nfs_wdata_cachep); | |
1da177e4 LT |
1829 | if (nfs_wdata_mempool == NULL) |
1830 | return -ENOMEM; | |
1831 | ||
0b7c0153 FI |
1832 | nfs_cdata_cachep = kmem_cache_create("nfs_commit_data", |
1833 | sizeof(struct nfs_commit_data), | |
1834 | 0, SLAB_HWCACHE_ALIGN, | |
1835 | NULL); | |
1836 | if (nfs_cdata_cachep == NULL) | |
1837 | return -ENOMEM; | |
1838 | ||
93d2341c MD |
1839 | nfs_commit_mempool = mempool_create_slab_pool(MIN_POOL_COMMIT, |
1840 | nfs_wdata_cachep); | |
1da177e4 LT |
1841 | if (nfs_commit_mempool == NULL) |
1842 | return -ENOMEM; | |
1843 | ||
89a09141 PZ |
1844 | /* |
1845 | * NFS congestion size, scale with available memory. | |
1846 | * | |
1847 | * 64MB: 8192k | |
1848 | * 128MB: 11585k | |
1849 | * 256MB: 16384k | |
1850 | * 512MB: 23170k | |
1851 | * 1GB: 32768k | |
1852 | * 2GB: 46340k | |
1853 | * 4GB: 65536k | |
1854 | * 8GB: 92681k | |
1855 | * 16GB: 131072k | |
1856 | * | |
1857 | * This allows larger machines to have larger/more transfers. | |
1858 | * Limit the default to 256M | |
1859 | */ | |
1860 | nfs_congestion_kb = (16*int_sqrt(totalram_pages)) << (PAGE_SHIFT-10); | |
1861 | if (nfs_congestion_kb > 256*1024) | |
1862 | nfs_congestion_kb = 256*1024; | |
1863 | ||
1da177e4 LT |
1864 | return 0; |
1865 | } | |
1866 | ||
266bee88 | 1867 | void nfs_destroy_writepagecache(void) |
1da177e4 LT |
1868 | { |
1869 | mempool_destroy(nfs_commit_mempool); | |
1870 | mempool_destroy(nfs_wdata_mempool); | |
1a1d92c1 | 1871 | kmem_cache_destroy(nfs_wdata_cachep); |
1da177e4 LT |
1872 | } |
1873 |