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457c8996 | 1 | // SPDX-License-Identifier: GPL-2.0-only |
f54bcf2e TH |
2 | /* |
3 | * Common NFS I/O operations for the pnfs file based | |
4 | * layout drivers. | |
5 | * | |
6 | * Copyright (c) 2014, Primary Data, Inc. All rights reserved. | |
7 | * | |
8 | * Tom Haynes <loghyr@primarydata.com> | |
9 | */ | |
10 | ||
11 | #include <linux/nfs_fs.h> | |
12 | #include <linux/nfs_page.h> | |
6b7f3cf9 | 13 | #include <linux/sunrpc/addr.h> |
5f01d953 | 14 | #include <linux/module.h> |
f54bcf2e | 15 | |
7405f9e1 | 16 | #include "nfs4session.h" |
f54bcf2e TH |
17 | #include "internal.h" |
18 | #include "pnfs.h" | |
19 | ||
875ae069 PT |
20 | #define NFSDBG_FACILITY NFSDBG_PNFS |
21 | ||
f54bcf2e TH |
22 | void pnfs_generic_rw_release(void *data) |
23 | { | |
24 | struct nfs_pgio_header *hdr = data; | |
f54bcf2e | 25 | |
f54bcf2e TH |
26 | nfs_put_client(hdr->ds_clp); |
27 | hdr->mds_ops->rpc_release(data); | |
28 | } | |
29 | EXPORT_SYMBOL_GPL(pnfs_generic_rw_release); | |
30 | ||
31 | /* Fake up some data that will cause nfs_commit_release to retry the writes. */ | |
32 | void pnfs_generic_prepare_to_resend_writes(struct nfs_commit_data *data) | |
33 | { | |
221203ce | 34 | struct nfs_writeverf *verf = data->res.verf; |
f54bcf2e TH |
35 | |
36 | data->task.tk_status = 0; | |
221203ce TM |
37 | memset(&verf->verifier, 0, sizeof(verf->verifier)); |
38 | verf->committed = NFS_UNSTABLE; | |
f54bcf2e TH |
39 | } |
40 | EXPORT_SYMBOL_GPL(pnfs_generic_prepare_to_resend_writes); | |
41 | ||
42 | void pnfs_generic_write_commit_done(struct rpc_task *task, void *data) | |
43 | { | |
44 | struct nfs_commit_data *wdata = data; | |
45 | ||
46 | /* Note this may cause RPC to be resent */ | |
47 | wdata->mds_ops->rpc_call_done(task, data); | |
48 | } | |
49 | EXPORT_SYMBOL_GPL(pnfs_generic_write_commit_done); | |
50 | ||
51 | void pnfs_generic_commit_release(void *calldata) | |
52 | { | |
53 | struct nfs_commit_data *data = calldata; | |
54 | ||
55 | data->completion_ops->completion(data); | |
56 | pnfs_put_lseg(data->lseg); | |
57 | nfs_put_client(data->ds_clp); | |
58 | nfs_commitdata_release(data); | |
59 | } | |
60 | EXPORT_SYMBOL_GPL(pnfs_generic_commit_release); | |
61 | ||
c84bea59 TM |
62 | static struct pnfs_layout_segment * |
63 | pnfs_free_bucket_lseg(struct pnfs_commit_bucket *bucket) | |
64 | { | |
65 | if (list_empty(&bucket->committing) && list_empty(&bucket->written)) { | |
66 | struct pnfs_layout_segment *freeme = bucket->lseg; | |
67 | bucket->lseg = NULL; | |
68 | return freeme; | |
69 | } | |
70 | return NULL; | |
71 | } | |
72 | ||
f54bcf2e TH |
73 | /* The generic layer is about to remove the req from the commit list. |
74 | * If this will make the bucket empty, it will need to put the lseg reference. | |
d0fbb1d8 | 75 | * Note this must be called holding nfsi->commit_mutex |
f54bcf2e TH |
76 | */ |
77 | void | |
78 | pnfs_generic_clear_request_commit(struct nfs_page *req, | |
79 | struct nfs_commit_info *cinfo) | |
80 | { | |
81 | struct pnfs_layout_segment *freeme = NULL; | |
82 | ||
83 | if (!test_and_clear_bit(PG_COMMIT_TO_DS, &req->wb_flags)) | |
84 | goto out; | |
85 | cinfo->ds->nwritten--; | |
86 | if (list_is_singular(&req->wb_list)) { | |
87 | struct pnfs_commit_bucket *bucket; | |
88 | ||
89 | bucket = list_first_entry(&req->wb_list, | |
90 | struct pnfs_commit_bucket, | |
91 | written); | |
c84bea59 | 92 | freeme = pnfs_free_bucket_lseg(bucket); |
f54bcf2e TH |
93 | } |
94 | out: | |
95 | nfs_request_remove_commit_list(req, cinfo); | |
8205b9ce | 96 | pnfs_put_lseg(freeme); |
f54bcf2e TH |
97 | } |
98 | EXPORT_SYMBOL_GPL(pnfs_generic_clear_request_commit); | |
99 | ||
d7242c46 TM |
100 | struct pnfs_commit_array * |
101 | pnfs_alloc_commit_array(size_t n, gfp_t gfp_flags) | |
102 | { | |
103 | struct pnfs_commit_array *p; | |
104 | struct pnfs_commit_bucket *b; | |
105 | ||
106 | p = kmalloc(struct_size(p, buckets, n), gfp_flags); | |
107 | if (!p) | |
108 | return NULL; | |
109 | p->nbuckets = n; | |
110 | INIT_LIST_HEAD(&p->cinfo_list); | |
111 | INIT_LIST_HEAD(&p->lseg_list); | |
112 | p->lseg = NULL; | |
113 | for (b = &p->buckets[0]; n != 0; b++, n--) { | |
114 | INIT_LIST_HEAD(&b->written); | |
115 | INIT_LIST_HEAD(&b->committing); | |
c84bea59 | 116 | b->lseg = NULL; |
d7242c46 TM |
117 | b->direct_verf.committed = NFS_INVALID_STABLE_HOW; |
118 | } | |
119 | return p; | |
120 | } | |
121 | EXPORT_SYMBOL_GPL(pnfs_alloc_commit_array); | |
122 | ||
123 | void | |
124 | pnfs_free_commit_array(struct pnfs_commit_array *p) | |
125 | { | |
126 | kfree_rcu(p, rcu); | |
127 | } | |
128 | EXPORT_SYMBOL_GPL(pnfs_free_commit_array); | |
129 | ||
ba827c9a TM |
130 | static struct pnfs_commit_array * |
131 | pnfs_find_commit_array_by_lseg(struct pnfs_ds_commit_info *fl_cinfo, | |
132 | struct pnfs_layout_segment *lseg) | |
133 | { | |
134 | struct pnfs_commit_array *array; | |
135 | ||
136 | list_for_each_entry_rcu(array, &fl_cinfo->commits, cinfo_list) { | |
137 | if (array->lseg == lseg) | |
138 | return array; | |
139 | } | |
140 | return NULL; | |
141 | } | |
142 | ||
143 | struct pnfs_commit_array * | |
144 | pnfs_add_commit_array(struct pnfs_ds_commit_info *fl_cinfo, | |
145 | struct pnfs_commit_array *new, | |
146 | struct pnfs_layout_segment *lseg) | |
147 | { | |
148 | struct pnfs_commit_array *array; | |
149 | ||
150 | array = pnfs_find_commit_array_by_lseg(fl_cinfo, lseg); | |
151 | if (array) | |
152 | return array; | |
153 | new->lseg = lseg; | |
154 | refcount_set(&new->refcount, 1); | |
155 | list_add_rcu(&new->cinfo_list, &fl_cinfo->commits); | |
156 | list_add(&new->lseg_list, &lseg->pls_commits); | |
157 | return new; | |
158 | } | |
159 | EXPORT_SYMBOL_GPL(pnfs_add_commit_array); | |
160 | ||
ba827c9a TM |
161 | static struct pnfs_commit_array * |
162 | pnfs_lookup_commit_array(struct pnfs_ds_commit_info *fl_cinfo, | |
163 | struct pnfs_layout_segment *lseg) | |
164 | { | |
165 | struct pnfs_commit_array *array; | |
166 | ||
167 | rcu_read_lock(); | |
168 | array = pnfs_find_commit_array_by_lseg(fl_cinfo, lseg); | |
169 | if (!array) { | |
170 | rcu_read_unlock(); | |
9c455a8c | 171 | fl_cinfo->ops->setup_ds_info(fl_cinfo, lseg); |
ba827c9a TM |
172 | rcu_read_lock(); |
173 | array = pnfs_find_commit_array_by_lseg(fl_cinfo, lseg); | |
174 | } | |
175 | rcu_read_unlock(); | |
176 | return array; | |
177 | } | |
178 | ||
a9901899 TM |
179 | static void |
180 | pnfs_release_commit_array_locked(struct pnfs_commit_array *array) | |
181 | { | |
182 | list_del_rcu(&array->cinfo_list); | |
183 | list_del(&array->lseg_list); | |
184 | pnfs_free_commit_array(array); | |
185 | } | |
186 | ||
187 | static void | |
188 | pnfs_put_commit_array_locked(struct pnfs_commit_array *array) | |
189 | { | |
190 | if (refcount_dec_and_test(&array->refcount)) | |
191 | pnfs_release_commit_array_locked(array); | |
192 | } | |
193 | ||
194 | static void | |
195 | pnfs_put_commit_array(struct pnfs_commit_array *array, struct inode *inode) | |
196 | { | |
197 | if (refcount_dec_and_lock(&array->refcount, &inode->i_lock)) { | |
198 | pnfs_release_commit_array_locked(array); | |
199 | spin_unlock(&inode->i_lock); | |
200 | } | |
201 | } | |
202 | ||
203 | static struct pnfs_commit_array * | |
204 | pnfs_get_commit_array(struct pnfs_commit_array *array) | |
205 | { | |
206 | if (refcount_inc_not_zero(&array->refcount)) | |
207 | return array; | |
208 | return NULL; | |
209 | } | |
210 | ||
211 | static void | |
212 | pnfs_remove_and_free_commit_array(struct pnfs_commit_array *array) | |
213 | { | |
214 | array->lseg = NULL; | |
215 | list_del_init(&array->lseg_list); | |
216 | pnfs_put_commit_array_locked(array); | |
217 | } | |
218 | ||
219 | void | |
220 | pnfs_generic_ds_cinfo_release_lseg(struct pnfs_ds_commit_info *fl_cinfo, | |
221 | struct pnfs_layout_segment *lseg) | |
222 | { | |
223 | struct pnfs_commit_array *array, *tmp; | |
224 | ||
225 | list_for_each_entry_safe(array, tmp, &lseg->pls_commits, lseg_list) | |
226 | pnfs_remove_and_free_commit_array(array); | |
227 | } | |
228 | EXPORT_SYMBOL_GPL(pnfs_generic_ds_cinfo_release_lseg); | |
229 | ||
230 | void | |
231 | pnfs_generic_ds_cinfo_destroy(struct pnfs_ds_commit_info *fl_cinfo) | |
232 | { | |
233 | struct pnfs_commit_array *array, *tmp; | |
234 | ||
235 | list_for_each_entry_safe(array, tmp, &fl_cinfo->commits, cinfo_list) | |
236 | pnfs_remove_and_free_commit_array(array); | |
237 | } | |
238 | EXPORT_SYMBOL_GPL(pnfs_generic_ds_cinfo_destroy); | |
239 | ||
a8e3765e TM |
240 | /* |
241 | * Locks the nfs_page requests for commit and moves them to | |
242 | * @bucket->committing. | |
243 | */ | |
f54bcf2e | 244 | static int |
a8e3765e TM |
245 | pnfs_bucket_scan_ds_commit_list(struct pnfs_commit_bucket *bucket, |
246 | struct nfs_commit_info *cinfo, | |
247 | int max) | |
f54bcf2e TH |
248 | { |
249 | struct list_head *src = &bucket->written; | |
250 | struct list_head *dst = &bucket->committing; | |
251 | int ret; | |
252 | ||
e824f99a | 253 | lockdep_assert_held(&NFS_I(cinfo->inode)->commit_mutex); |
5d2a9d9d | 254 | ret = nfs_scan_commit_list(src, dst, cinfo, max); |
f54bcf2e TH |
255 | if (ret) { |
256 | cinfo->ds->nwritten -= ret; | |
257 | cinfo->ds->ncommitting += ret; | |
f54bcf2e TH |
258 | } |
259 | return ret; | |
260 | } | |
261 | ||
a8e3765e TM |
262 | static int pnfs_bucket_scan_array(struct nfs_commit_info *cinfo, |
263 | struct pnfs_commit_bucket *buckets, | |
264 | unsigned int nbuckets, | |
265 | int max) | |
266 | { | |
267 | unsigned int i; | |
268 | int rv = 0, cnt; | |
269 | ||
270 | for (i = 0; i < nbuckets && max != 0; i++) { | |
271 | cnt = pnfs_bucket_scan_ds_commit_list(&buckets[i], cinfo, max); | |
272 | rv += cnt; | |
273 | max -= cnt; | |
274 | } | |
275 | return rv; | |
276 | } | |
277 | ||
085d1e33 TH |
278 | /* Move reqs from written to committing lists, returning count |
279 | * of number moved. | |
f54bcf2e | 280 | */ |
a8e3765e | 281 | int pnfs_generic_scan_commit_lists(struct nfs_commit_info *cinfo, int max) |
f54bcf2e | 282 | { |
a8e3765e TM |
283 | struct pnfs_ds_commit_info *fl_cinfo = cinfo->ds; |
284 | struct pnfs_commit_array *array; | |
285 | int rv = 0, cnt; | |
286 | ||
a9901899 TM |
287 | rcu_read_lock(); |
288 | list_for_each_entry_rcu(array, &fl_cinfo->commits, cinfo_list) { | |
289 | if (!array->lseg || !pnfs_get_commit_array(array)) | |
290 | continue; | |
291 | rcu_read_unlock(); | |
a8e3765e TM |
292 | cnt = pnfs_bucket_scan_array(cinfo, array->buckets, |
293 | array->nbuckets, max); | |
a9901899 TM |
294 | rcu_read_lock(); |
295 | pnfs_put_commit_array(array, cinfo->inode); | |
f54bcf2e | 296 | rv += cnt; |
a8e3765e TM |
297 | max -= cnt; |
298 | if (!max) | |
299 | break; | |
f54bcf2e | 300 | } |
a9901899 | 301 | rcu_read_unlock(); |
f54bcf2e TH |
302 | return rv; |
303 | } | |
304 | EXPORT_SYMBOL_GPL(pnfs_generic_scan_commit_lists); | |
305 | ||
fce9ed03 TM |
306 | static unsigned int |
307 | pnfs_bucket_recover_commit_reqs(struct list_head *dst, | |
308 | struct pnfs_commit_bucket *buckets, | |
309 | unsigned int nbuckets, | |
310 | struct nfs_commit_info *cinfo) | |
f54bcf2e TH |
311 | { |
312 | struct pnfs_commit_bucket *b; | |
313 | struct pnfs_layout_segment *freeme; | |
fce9ed03 TM |
314 | unsigned int nwritten, ret = 0; |
315 | unsigned int i; | |
f54bcf2e TH |
316 | |
317 | restart: | |
fce9ed03 | 318 | for (i = 0, b = buckets; i < nbuckets; i++, b++) { |
5d2a9d9d | 319 | nwritten = nfs_scan_commit_list(&b->written, dst, cinfo, 0); |
e39928f9 TM |
320 | if (!nwritten) |
321 | continue; | |
fce9ed03 | 322 | ret += nwritten; |
c84bea59 TM |
323 | freeme = pnfs_free_bucket_lseg(b); |
324 | if (freeme) { | |
f54bcf2e TH |
325 | pnfs_put_lseg(freeme); |
326 | goto restart; | |
327 | } | |
328 | } | |
fce9ed03 TM |
329 | return ret; |
330 | } | |
331 | ||
332 | /* Pull everything off the committing lists and dump into @dst. */ | |
333 | void pnfs_generic_recover_commit_reqs(struct list_head *dst, | |
334 | struct nfs_commit_info *cinfo) | |
335 | { | |
336 | struct pnfs_ds_commit_info *fl_cinfo = cinfo->ds; | |
337 | struct pnfs_commit_array *array; | |
338 | unsigned int nwritten; | |
339 | ||
340 | lockdep_assert_held(&NFS_I(cinfo->inode)->commit_mutex); | |
a9901899 TM |
341 | rcu_read_lock(); |
342 | list_for_each_entry_rcu(array, &fl_cinfo->commits, cinfo_list) { | |
343 | if (!array->lseg || !pnfs_get_commit_array(array)) | |
344 | continue; | |
345 | rcu_read_unlock(); | |
fce9ed03 TM |
346 | nwritten = pnfs_bucket_recover_commit_reqs(dst, |
347 | array->buckets, | |
348 | array->nbuckets, | |
349 | cinfo); | |
a9901899 TM |
350 | rcu_read_lock(); |
351 | pnfs_put_commit_array(array, cinfo->inode); | |
fce9ed03 TM |
352 | fl_cinfo->nwritten -= nwritten; |
353 | } | |
a9901899 | 354 | rcu_read_unlock(); |
f54bcf2e TH |
355 | } |
356 | EXPORT_SYMBOL_GPL(pnfs_generic_recover_commit_reqs); | |
357 | ||
fb6b53ba TM |
358 | static struct nfs_page * |
359 | pnfs_bucket_search_commit_reqs(struct pnfs_commit_bucket *buckets, | |
360 | unsigned int nbuckets, struct page *page) | |
361 | { | |
362 | struct nfs_page *req; | |
363 | struct pnfs_commit_bucket *b; | |
364 | unsigned int i; | |
365 | ||
366 | /* Linearly search the commit lists for each bucket until a matching | |
367 | * request is found */ | |
368 | for (i = 0, b = buckets; i < nbuckets; i++, b++) { | |
369 | list_for_each_entry(req, &b->written, wb_list) { | |
370 | if (req->wb_page == page) | |
371 | return req->wb_head; | |
372 | } | |
373 | list_for_each_entry(req, &b->committing, wb_list) { | |
374 | if (req->wb_page == page) | |
375 | return req->wb_head; | |
376 | } | |
377 | } | |
378 | return NULL; | |
379 | } | |
380 | ||
381 | /* pnfs_generic_search_commit_reqs - Search lists in @cinfo for the head reqest | |
382 | * for @page | |
383 | * @cinfo - commit info for current inode | |
384 | * @page - page to search for matching head request | |
385 | * | |
386 | * Returns a the head request if one is found, otherwise returns NULL. | |
387 | */ | |
388 | struct nfs_page * | |
389 | pnfs_generic_search_commit_reqs(struct nfs_commit_info *cinfo, struct page *page) | |
390 | { | |
391 | struct pnfs_ds_commit_info *fl_cinfo = cinfo->ds; | |
392 | struct pnfs_commit_array *array; | |
393 | struct nfs_page *req; | |
394 | ||
fb6b53ba TM |
395 | list_for_each_entry(array, &fl_cinfo->commits, cinfo_list) { |
396 | req = pnfs_bucket_search_commit_reqs(array->buckets, | |
397 | array->nbuckets, page); | |
398 | if (req) | |
399 | return req; | |
400 | } | |
401 | return NULL; | |
402 | } | |
403 | EXPORT_SYMBOL_GPL(pnfs_generic_search_commit_reqs); | |
404 | ||
19573c93 TM |
405 | static struct pnfs_layout_segment * |
406 | pnfs_bucket_get_committing(struct list_head *head, | |
407 | struct pnfs_commit_bucket *bucket, | |
408 | struct nfs_commit_info *cinfo) | |
f54bcf2e | 409 | { |
41181886 | 410 | struct list_head *pos; |
19573c93 TM |
411 | |
412 | list_for_each(pos, &bucket->committing) | |
413 | cinfo->ds->ncommitting--; | |
414 | list_splice_init(&bucket->committing, head); | |
c84bea59 | 415 | return pnfs_free_bucket_lseg(bucket); |
19573c93 TM |
416 | } |
417 | ||
418 | static struct nfs_commit_data * | |
419 | pnfs_bucket_fetch_commitdata(struct pnfs_commit_bucket *bucket, | |
420 | struct nfs_commit_info *cinfo) | |
421 | { | |
422 | struct nfs_commit_data *data = nfs_commitdata_alloc(false); | |
423 | ||
424 | if (!data) | |
425 | return NULL; | |
426 | data->lseg = pnfs_bucket_get_committing(&data->pages, bucket, cinfo); | |
c84bea59 TM |
427 | if (!data->lseg) |
428 | data->lseg = pnfs_get_lseg(bucket->lseg); | |
19573c93 TM |
429 | return data; |
430 | } | |
431 | ||
432 | static void pnfs_generic_retry_commit(struct pnfs_commit_bucket *buckets, | |
433 | unsigned int nbuckets, | |
434 | struct nfs_commit_info *cinfo, | |
435 | unsigned int idx) | |
436 | { | |
437 | struct pnfs_commit_bucket *bucket; | |
438 | struct pnfs_layout_segment *freeme; | |
27571297 | 439 | LIST_HEAD(pages); |
f54bcf2e | 440 | |
19573c93 | 441 | for (bucket = buckets; idx < nbuckets; bucket++, idx++) { |
f54bcf2e TH |
442 | if (list_empty(&bucket->committing)) |
443 | continue; | |
19573c93 TM |
444 | mutex_lock(&NFS_I(cinfo->inode)->commit_mutex); |
445 | freeme = pnfs_bucket_get_committing(&pages, bucket, cinfo); | |
d0fbb1d8 | 446 | mutex_unlock(&NFS_I(cinfo->inode)->commit_mutex); |
19573c93 | 447 | nfs_retry_commit(&pages, freeme, cinfo, idx); |
f54bcf2e TH |
448 | pnfs_put_lseg(freeme); |
449 | } | |
450 | } | |
451 | ||
452 | static unsigned int | |
19573c93 TM |
453 | pnfs_bucket_alloc_ds_commits(struct list_head *list, |
454 | struct pnfs_commit_bucket *buckets, | |
455 | unsigned int nbuckets, | |
456 | struct nfs_commit_info *cinfo) | |
f54bcf2e | 457 | { |
f54bcf2e TH |
458 | struct pnfs_commit_bucket *bucket; |
459 | struct nfs_commit_data *data; | |
19573c93 | 460 | unsigned int i; |
f54bcf2e TH |
461 | unsigned int nreq = 0; |
462 | ||
19573c93 | 463 | for (i = 0, bucket = buckets; i < nbuckets; i++, bucket++) { |
f54bcf2e TH |
464 | if (list_empty(&bucket->committing)) |
465 | continue; | |
19573c93 TM |
466 | mutex_lock(&NFS_I(cinfo->inode)->commit_mutex); |
467 | if (!list_empty(&bucket->committing)) { | |
468 | data = pnfs_bucket_fetch_commitdata(bucket, cinfo); | |
469 | if (!data) | |
470 | goto out_error; | |
471 | data->ds_commit_index = i; | |
472 | list_add_tail(&data->list, list); | |
473 | atomic_inc(&cinfo->mds->rpcs_out); | |
474 | nreq++; | |
475 | } | |
476 | mutex_unlock(&NFS_I(cinfo->inode)->commit_mutex); | |
f54bcf2e | 477 | } |
f54bcf2e | 478 | return nreq; |
19573c93 | 479 | out_error: |
d0fbb1d8 | 480 | mutex_unlock(&NFS_I(cinfo->inode)->commit_mutex); |
19573c93 TM |
481 | /* Clean up on error */ |
482 | pnfs_generic_retry_commit(buckets, nbuckets, cinfo, i); | |
483 | return nreq; | |
ade8febd WAA |
484 | } |
485 | ||
0cb1f6df TM |
486 | static unsigned int |
487 | pnfs_alloc_ds_commits_list(struct list_head *list, | |
488 | struct pnfs_ds_commit_info *fl_cinfo, | |
489 | struct nfs_commit_info *cinfo) | |
490 | { | |
491 | struct pnfs_commit_array *array; | |
492 | unsigned int ret = 0; | |
493 | ||
a9901899 TM |
494 | rcu_read_lock(); |
495 | list_for_each_entry_rcu(array, &fl_cinfo->commits, cinfo_list) { | |
496 | if (!array->lseg || !pnfs_get_commit_array(array)) | |
497 | continue; | |
498 | rcu_read_unlock(); | |
0cb1f6df TM |
499 | ret += pnfs_bucket_alloc_ds_commits(list, array->buckets, |
500 | array->nbuckets, cinfo); | |
a9901899 TM |
501 | rcu_read_lock(); |
502 | pnfs_put_commit_array(array, cinfo->inode); | |
503 | } | |
27d231c0 | 504 | rcu_read_unlock(); |
0cb1f6df TM |
505 | return ret; |
506 | } | |
507 | ||
f54bcf2e TH |
508 | /* This follows nfs_commit_list pretty closely */ |
509 | int | |
510 | pnfs_generic_commit_pagelist(struct inode *inode, struct list_head *mds_pages, | |
511 | int how, struct nfs_commit_info *cinfo, | |
512 | int (*initiate_commit)(struct nfs_commit_data *data, | |
513 | int how)) | |
514 | { | |
19573c93 | 515 | struct pnfs_ds_commit_info *fl_cinfo = cinfo->ds; |
f54bcf2e TH |
516 | struct nfs_commit_data *data, *tmp; |
517 | LIST_HEAD(list); | |
518 | unsigned int nreq = 0; | |
519 | ||
520 | if (!list_empty(mds_pages)) { | |
518662e0 N |
521 | data = nfs_commitdata_alloc(true); |
522 | data->ds_commit_index = -1; | |
19573c93 TM |
523 | list_splice_init(mds_pages, &data->pages); |
524 | list_add_tail(&data->list, &list); | |
525 | atomic_inc(&cinfo->mds->rpcs_out); | |
518662e0 | 526 | nreq++; |
f54bcf2e TH |
527 | } |
528 | ||
0cb1f6df | 529 | nreq += pnfs_alloc_ds_commits_list(&list, fl_cinfo, cinfo); |
af7cf057 | 530 | if (nreq == 0) |
f54bcf2e | 531 | goto out; |
f54bcf2e | 532 | |
19573c93 TM |
533 | list_for_each_entry_safe(data, tmp, &list, list) { |
534 | list_del(&data->list); | |
27571297 | 535 | if (data->ds_commit_index < 0) { |
19573c93 | 536 | nfs_init_commit(data, NULL, NULL, cinfo); |
f54bcf2e | 537 | nfs_initiate_commit(NFS_CLIENT(inode), data, |
c36aae9a | 538 | NFS_PROTO(data->inode), |
4fa7ef69 TM |
539 | data->mds_ops, how, |
540 | RPC_TASK_CRED_NOREF); | |
f54bcf2e | 541 | } else { |
19573c93 | 542 | nfs_init_commit(data, NULL, data->lseg, cinfo); |
f54bcf2e TH |
543 | initiate_commit(data, how); |
544 | } | |
545 | } | |
546 | out: | |
f54bcf2e TH |
547 | return PNFS_ATTEMPTED; |
548 | } | |
549 | EXPORT_SYMBOL_GPL(pnfs_generic_commit_pagelist); | |
875ae069 PT |
550 | |
551 | /* | |
552 | * Data server cache | |
553 | * | |
554 | * Data servers can be mapped to different device ids. | |
555 | * nfs4_pnfs_ds reference counting | |
556 | * - set to 1 on allocation | |
557 | * - incremented when a device id maps a data server already in the cache. | |
558 | * - decremented when deviceid is removed from the cache. | |
559 | */ | |
560 | static DEFINE_SPINLOCK(nfs4_ds_cache_lock); | |
561 | static LIST_HEAD(nfs4_data_server_cache); | |
562 | ||
563 | /* Debug routines */ | |
564 | static void | |
565 | print_ds(struct nfs4_pnfs_ds *ds) | |
566 | { | |
567 | if (ds == NULL) { | |
568 | printk(KERN_WARNING "%s NULL device\n", __func__); | |
569 | return; | |
570 | } | |
571 | printk(KERN_WARNING " ds %s\n" | |
572 | " ref count %d\n" | |
573 | " client %p\n" | |
574 | " cl_exchange_flags %x\n", | |
575 | ds->ds_remotestr, | |
a2a5dea7 | 576 | refcount_read(&ds->ds_count), ds->ds_clp, |
875ae069 PT |
577 | ds->ds_clp ? ds->ds_clp->cl_exchange_flags : 0); |
578 | } | |
579 | ||
580 | static bool | |
581 | same_sockaddr(struct sockaddr *addr1, struct sockaddr *addr2) | |
582 | { | |
583 | struct sockaddr_in *a, *b; | |
584 | struct sockaddr_in6 *a6, *b6; | |
585 | ||
586 | if (addr1->sa_family != addr2->sa_family) | |
587 | return false; | |
588 | ||
589 | switch (addr1->sa_family) { | |
590 | case AF_INET: | |
591 | a = (struct sockaddr_in *)addr1; | |
592 | b = (struct sockaddr_in *)addr2; | |
593 | ||
594 | if (a->sin_addr.s_addr == b->sin_addr.s_addr && | |
595 | a->sin_port == b->sin_port) | |
596 | return true; | |
597 | break; | |
598 | ||
599 | case AF_INET6: | |
600 | a6 = (struct sockaddr_in6 *)addr1; | |
601 | b6 = (struct sockaddr_in6 *)addr2; | |
602 | ||
603 | /* LINKLOCAL addresses must have matching scope_id */ | |
604 | if (ipv6_addr_src_scope(&a6->sin6_addr) == | |
605 | IPV6_ADDR_SCOPE_LINKLOCAL && | |
606 | a6->sin6_scope_id != b6->sin6_scope_id) | |
607 | return false; | |
608 | ||
609 | if (ipv6_addr_equal(&a6->sin6_addr, &b6->sin6_addr) && | |
610 | a6->sin6_port == b6->sin6_port) | |
611 | return true; | |
612 | break; | |
613 | ||
614 | default: | |
615 | dprintk("%s: unhandled address family: %u\n", | |
616 | __func__, addr1->sa_family); | |
617 | return false; | |
618 | } | |
619 | ||
620 | return false; | |
621 | } | |
622 | ||
6f536936 TM |
623 | /* |
624 | * Checks if 'dsaddrs1' contains a subset of 'dsaddrs2'. If it does, | |
625 | * declare a match. | |
626 | */ | |
875ae069 PT |
627 | static bool |
628 | _same_data_server_addrs_locked(const struct list_head *dsaddrs1, | |
629 | const struct list_head *dsaddrs2) | |
630 | { | |
631 | struct nfs4_pnfs_ds_addr *da1, *da2; | |
6f536936 TM |
632 | struct sockaddr *sa1, *sa2; |
633 | bool match = false; | |
634 | ||
635 | list_for_each_entry(da1, dsaddrs1, da_node) { | |
636 | sa1 = (struct sockaddr *)&da1->da_addr; | |
637 | match = false; | |
638 | list_for_each_entry(da2, dsaddrs2, da_node) { | |
639 | sa2 = (struct sockaddr *)&da2->da_addr; | |
640 | match = same_sockaddr(sa1, sa2); | |
641 | if (match) | |
642 | break; | |
643 | } | |
644 | if (!match) | |
645 | break; | |
875ae069 | 646 | } |
6f536936 | 647 | return match; |
875ae069 PT |
648 | } |
649 | ||
650 | /* | |
651 | * Lookup DS by addresses. nfs4_ds_cache_lock is held | |
652 | */ | |
653 | static struct nfs4_pnfs_ds * | |
654 | _data_server_lookup_locked(const struct list_head *dsaddrs) | |
655 | { | |
656 | struct nfs4_pnfs_ds *ds; | |
657 | ||
658 | list_for_each_entry(ds, &nfs4_data_server_cache, ds_node) | |
659 | if (_same_data_server_addrs_locked(&ds->ds_addrs, dsaddrs)) | |
660 | return ds; | |
661 | return NULL; | |
662 | } | |
663 | ||
664 | static void destroy_ds(struct nfs4_pnfs_ds *ds) | |
665 | { | |
666 | struct nfs4_pnfs_ds_addr *da; | |
667 | ||
668 | dprintk("--> %s\n", __func__); | |
669 | ifdebug(FACILITY) | |
670 | print_ds(ds); | |
671 | ||
672 | nfs_put_client(ds->ds_clp); | |
673 | ||
674 | while (!list_empty(&ds->ds_addrs)) { | |
675 | da = list_first_entry(&ds->ds_addrs, | |
676 | struct nfs4_pnfs_ds_addr, | |
677 | da_node); | |
678 | list_del_init(&da->da_node); | |
679 | kfree(da->da_remotestr); | |
680 | kfree(da); | |
681 | } | |
682 | ||
683 | kfree(ds->ds_remotestr); | |
684 | kfree(ds); | |
685 | } | |
686 | ||
687 | void nfs4_pnfs_ds_put(struct nfs4_pnfs_ds *ds) | |
688 | { | |
a2a5dea7 | 689 | if (refcount_dec_and_lock(&ds->ds_count, |
875ae069 PT |
690 | &nfs4_ds_cache_lock)) { |
691 | list_del_init(&ds->ds_node); | |
692 | spin_unlock(&nfs4_ds_cache_lock); | |
693 | destroy_ds(ds); | |
694 | } | |
695 | } | |
696 | EXPORT_SYMBOL_GPL(nfs4_pnfs_ds_put); | |
697 | ||
698 | /* | |
699 | * Create a string with a human readable address and port to avoid | |
700 | * complicated setup around many dprinks. | |
701 | */ | |
702 | static char * | |
703 | nfs4_pnfs_remotestr(struct list_head *dsaddrs, gfp_t gfp_flags) | |
704 | { | |
705 | struct nfs4_pnfs_ds_addr *da; | |
706 | char *remotestr; | |
707 | size_t len; | |
708 | char *p; | |
709 | ||
710 | len = 3; /* '{', '}' and eol */ | |
711 | list_for_each_entry(da, dsaddrs, da_node) { | |
712 | len += strlen(da->da_remotestr) + 1; /* string plus comma */ | |
713 | } | |
714 | ||
715 | remotestr = kzalloc(len, gfp_flags); | |
716 | if (!remotestr) | |
717 | return NULL; | |
718 | ||
719 | p = remotestr; | |
720 | *(p++) = '{'; | |
721 | len--; | |
722 | list_for_each_entry(da, dsaddrs, da_node) { | |
723 | size_t ll = strlen(da->da_remotestr); | |
724 | ||
725 | if (ll > len) | |
726 | goto out_err; | |
727 | ||
728 | memcpy(p, da->da_remotestr, ll); | |
729 | p += ll; | |
730 | len -= ll; | |
731 | ||
732 | if (len < 1) | |
733 | goto out_err; | |
734 | (*p++) = ','; | |
735 | len--; | |
736 | } | |
737 | if (len < 2) | |
738 | goto out_err; | |
739 | *(p++) = '}'; | |
740 | *p = '\0'; | |
741 | return remotestr; | |
742 | out_err: | |
743 | kfree(remotestr); | |
744 | return NULL; | |
745 | } | |
746 | ||
747 | /* | |
748 | * Given a list of multipath struct nfs4_pnfs_ds_addr, add it to ds cache if | |
749 | * uncached and return cached struct nfs4_pnfs_ds. | |
750 | */ | |
751 | struct nfs4_pnfs_ds * | |
752 | nfs4_pnfs_ds_add(struct list_head *dsaddrs, gfp_t gfp_flags) | |
753 | { | |
754 | struct nfs4_pnfs_ds *tmp_ds, *ds = NULL; | |
755 | char *remotestr; | |
756 | ||
757 | if (list_empty(dsaddrs)) { | |
758 | dprintk("%s: no addresses defined\n", __func__); | |
759 | goto out; | |
760 | } | |
761 | ||
762 | ds = kzalloc(sizeof(*ds), gfp_flags); | |
763 | if (!ds) | |
764 | goto out; | |
765 | ||
766 | /* this is only used for debugging, so it's ok if its NULL */ | |
767 | remotestr = nfs4_pnfs_remotestr(dsaddrs, gfp_flags); | |
768 | ||
769 | spin_lock(&nfs4_ds_cache_lock); | |
770 | tmp_ds = _data_server_lookup_locked(dsaddrs); | |
771 | if (tmp_ds == NULL) { | |
772 | INIT_LIST_HEAD(&ds->ds_addrs); | |
773 | list_splice_init(dsaddrs, &ds->ds_addrs); | |
774 | ds->ds_remotestr = remotestr; | |
a2a5dea7 | 775 | refcount_set(&ds->ds_count, 1); |
875ae069 PT |
776 | INIT_LIST_HEAD(&ds->ds_node); |
777 | ds->ds_clp = NULL; | |
778 | list_add(&ds->ds_node, &nfs4_data_server_cache); | |
779 | dprintk("%s add new data server %s\n", __func__, | |
780 | ds->ds_remotestr); | |
781 | } else { | |
782 | kfree(remotestr); | |
783 | kfree(ds); | |
a2a5dea7 | 784 | refcount_inc(&tmp_ds->ds_count); |
875ae069 PT |
785 | dprintk("%s data server %s found, inc'ed ds_count to %d\n", |
786 | __func__, tmp_ds->ds_remotestr, | |
a2a5dea7 | 787 | refcount_read(&tmp_ds->ds_count)); |
875ae069 PT |
788 | ds = tmp_ds; |
789 | } | |
790 | spin_unlock(&nfs4_ds_cache_lock); | |
791 | out: | |
792 | return ds; | |
793 | } | |
794 | EXPORT_SYMBOL_GPL(nfs4_pnfs_ds_add); | |
6b7f3cf9 | 795 | |
7405f9e1 PT |
796 | static void nfs4_wait_ds_connect(struct nfs4_pnfs_ds *ds) |
797 | { | |
798 | might_sleep(); | |
799 | wait_on_bit(&ds->ds_state, NFS4DS_CONNECTING, | |
800 | TASK_KILLABLE); | |
801 | } | |
802 | ||
803 | static void nfs4_clear_ds_conn_bit(struct nfs4_pnfs_ds *ds) | |
804 | { | |
805 | smp_mb__before_atomic(); | |
806 | clear_bit(NFS4DS_CONNECTING, &ds->ds_state); | |
807 | smp_mb__after_atomic(); | |
808 | wake_up_bit(&ds->ds_state, NFS4DS_CONNECTING); | |
809 | } | |
810 | ||
5f01d953 | 811 | static struct nfs_client *(*get_v3_ds_connect)( |
b224f7cb | 812 | struct nfs_server *mds_srv, |
5f01d953 PT |
813 | const struct sockaddr *ds_addr, |
814 | int ds_addrlen, | |
815 | int ds_proto, | |
816 | unsigned int ds_timeo, | |
7d38de3f | 817 | unsigned int ds_retrans); |
5f01d953 PT |
818 | |
819 | static bool load_v3_ds_connect(void) | |
820 | { | |
821 | if (!get_v3_ds_connect) { | |
822 | get_v3_ds_connect = symbol_request(nfs3_set_ds_client); | |
823 | WARN_ON_ONCE(!get_v3_ds_connect); | |
824 | } | |
825 | ||
826 | return(get_v3_ds_connect != NULL); | |
827 | } | |
828 | ||
df137bc1 | 829 | void nfs4_pnfs_v3_ds_connect_unload(void) |
5f01d953 PT |
830 | { |
831 | if (get_v3_ds_connect) { | |
832 | symbol_put(nfs3_set_ds_client); | |
833 | get_v3_ds_connect = NULL; | |
834 | } | |
835 | } | |
5f01d953 PT |
836 | |
837 | static int _nfs4_pnfs_v3_ds_connect(struct nfs_server *mds_srv, | |
838 | struct nfs4_pnfs_ds *ds, | |
839 | unsigned int timeo, | |
7d38de3f | 840 | unsigned int retrans) |
5f01d953 PT |
841 | { |
842 | struct nfs_client *clp = ERR_PTR(-EIO); | |
843 | struct nfs4_pnfs_ds_addr *da; | |
844 | int status = 0; | |
845 | ||
7d38de3f | 846 | dprintk("--> %s DS %s\n", __func__, ds->ds_remotestr); |
5f01d953 PT |
847 | |
848 | if (!load_v3_ds_connect()) | |
849 | goto out; | |
850 | ||
851 | list_for_each_entry(da, &ds->ds_addrs, da_node) { | |
852 | dprintk("%s: DS %s: trying address %s\n", | |
853 | __func__, ds->ds_remotestr, da->da_remotestr); | |
854 | ||
fc821d59 TM |
855 | if (!IS_ERR(clp)) { |
856 | struct xprt_create xprt_args = { | |
857 | .ident = XPRT_TRANSPORT_TCP, | |
858 | .net = clp->cl_net, | |
859 | .dstaddr = (struct sockaddr *)&da->da_addr, | |
860 | .addrlen = da->da_addrlen, | |
861 | .servername = clp->cl_hostname, | |
862 | }; | |
863 | /* Add this address as an alias */ | |
864 | rpc_clnt_add_xprt(clp->cl_rpcclient, &xprt_args, | |
865 | rpc_clnt_test_and_add_xprt, NULL); | |
bf2bf9b8 TM |
866 | continue; |
867 | } | |
868 | clp = get_v3_ds_connect(mds_srv, | |
869 | (struct sockaddr *)&da->da_addr, | |
870 | da->da_addrlen, IPPROTO_TCP, | |
871 | timeo, retrans); | |
872 | if (IS_ERR(clp)) | |
873 | continue; | |
874 | clp->cl_rpcclient->cl_softerr = 0; | |
875 | clp->cl_rpcclient->cl_softrtry = 0; | |
5f01d953 PT |
876 | } |
877 | ||
878 | if (IS_ERR(clp)) { | |
879 | status = PTR_ERR(clp); | |
880 | goto out; | |
881 | } | |
882 | ||
883 | smp_wmb(); | |
884 | ds->ds_clp = clp; | |
885 | dprintk("%s [new] addr: %s\n", __func__, ds->ds_remotestr); | |
886 | out: | |
887 | return status; | |
888 | } | |
889 | ||
890 | static int _nfs4_pnfs_v4_ds_connect(struct nfs_server *mds_srv, | |
7405f9e1 PT |
891 | struct nfs4_pnfs_ds *ds, |
892 | unsigned int timeo, | |
064172f3 | 893 | unsigned int retrans, |
7d38de3f | 894 | u32 minor_version) |
7405f9e1 PT |
895 | { |
896 | struct nfs_client *clp = ERR_PTR(-EIO); | |
897 | struct nfs4_pnfs_ds_addr *da; | |
898 | int status = 0; | |
899 | ||
7d38de3f | 900 | dprintk("--> %s DS %s\n", __func__, ds->ds_remotestr); |
7405f9e1 PT |
901 | |
902 | list_for_each_entry(da, &ds->ds_addrs, da_node) { | |
903 | dprintk("%s: DS %s: trying address %s\n", | |
904 | __func__, ds->ds_remotestr, da->da_remotestr); | |
905 | ||
04fa2c6b AA |
906 | if (!IS_ERR(clp) && clp->cl_mvops->session_trunk) { |
907 | struct xprt_create xprt_args = { | |
908 | .ident = XPRT_TRANSPORT_TCP, | |
909 | .net = clp->cl_net, | |
910 | .dstaddr = (struct sockaddr *)&da->da_addr, | |
911 | .addrlen = da->da_addrlen, | |
912 | .servername = clp->cl_hostname, | |
913 | }; | |
914 | struct nfs4_add_xprt_data xprtdata = { | |
915 | .clp = clp, | |
916 | .cred = nfs4_get_clid_cred(clp), | |
917 | }; | |
918 | struct rpc_add_xprt_test rpcdata = { | |
919 | .add_xprt_test = clp->cl_mvops->session_trunk, | |
920 | .data = &xprtdata, | |
921 | }; | |
922 | ||
923 | /** | |
924 | * Test this address for session trunking and | |
925 | * add as an alias | |
926 | */ | |
927 | rpc_clnt_add_xprt(clp->cl_rpcclient, &xprt_args, | |
928 | rpc_clnt_setup_test_and_add_xprt, | |
929 | &rpcdata); | |
930 | if (xprtdata.cred) | |
a52458b4 | 931 | put_cred(xprtdata.cred); |
04fa2c6b AA |
932 | } else { |
933 | clp = nfs4_set_ds_client(mds_srv, | |
934 | (struct sockaddr *)&da->da_addr, | |
935 | da->da_addrlen, IPPROTO_TCP, | |
7d38de3f | 936 | timeo, retrans, minor_version); |
04fa2c6b AA |
937 | if (IS_ERR(clp)) |
938 | continue; | |
939 | ||
940 | status = nfs4_init_ds_session(clp, | |
941 | mds_srv->nfs_client->cl_lease_time); | |
942 | if (status) { | |
943 | nfs_put_client(clp); | |
944 | clp = ERR_PTR(-EIO); | |
945 | continue; | |
946 | } | |
947 | ||
948 | } | |
7405f9e1 PT |
949 | } |
950 | ||
951 | if (IS_ERR(clp)) { | |
952 | status = PTR_ERR(clp); | |
953 | goto out; | |
954 | } | |
955 | ||
7405f9e1 PT |
956 | smp_wmb(); |
957 | ds->ds_clp = clp; | |
958 | dprintk("%s [new] addr: %s\n", __func__, ds->ds_remotestr); | |
959 | out: | |
960 | return status; | |
7405f9e1 PT |
961 | } |
962 | ||
963 | /* | |
964 | * Create an rpc connection to the nfs4_pnfs_ds data server. | |
965 | * Currently only supports IPv4 and IPv6 addresses. | |
a33e4b03 | 966 | * If connection fails, make devid unavailable and return a -errno. |
7405f9e1 | 967 | */ |
a33e4b03 | 968 | int nfs4_pnfs_ds_connect(struct nfs_server *mds_srv, struct nfs4_pnfs_ds *ds, |
7405f9e1 | 969 | struct nfs4_deviceid_node *devid, unsigned int timeo, |
7d38de3f | 970 | unsigned int retrans, u32 version, u32 minor_version) |
7405f9e1 | 971 | { |
da066f3f | 972 | int err; |
7405f9e1 | 973 | |
da066f3f WAA |
974 | again: |
975 | err = 0; | |
976 | if (test_and_set_bit(NFS4DS_CONNECTING, &ds->ds_state) == 0) { | |
5f01d953 PT |
977 | if (version == 3) { |
978 | err = _nfs4_pnfs_v3_ds_connect(mds_srv, ds, timeo, | |
7d38de3f | 979 | retrans); |
5f01d953 PT |
980 | } else if (version == 4) { |
981 | err = _nfs4_pnfs_v4_ds_connect(mds_srv, ds, timeo, | |
7d38de3f | 982 | retrans, minor_version); |
5f01d953 PT |
983 | } else { |
984 | dprintk("%s: unsupported DS version %d\n", __func__, | |
985 | version); | |
986 | err = -EPROTONOSUPPORT; | |
987 | } | |
988 | ||
7405f9e1 PT |
989 | nfs4_clear_ds_conn_bit(ds); |
990 | } else { | |
991 | nfs4_wait_ds_connect(ds); | |
da066f3f WAA |
992 | |
993 | /* what was waited on didn't connect AND didn't mark unavail */ | |
994 | if (!ds->ds_clp && !nfs4_test_deviceid_unavailable(devid)) | |
995 | goto again; | |
7405f9e1 | 996 | } |
a33e4b03 WAA |
997 | |
998 | /* | |
999 | * At this point the ds->ds_clp should be ready, but it might have | |
1000 | * hit an error. | |
1001 | */ | |
da066f3f WAA |
1002 | if (!err) { |
1003 | if (!ds->ds_clp || !nfs_client_init_is_complete(ds->ds_clp)) { | |
1004 | WARN_ON_ONCE(ds->ds_clp || | |
1005 | !nfs4_test_deviceid_unavailable(devid)); | |
1006 | return -EINVAL; | |
1007 | } | |
1008 | err = nfs_client_init_status(ds->ds_clp); | |
a33e4b03 WAA |
1009 | } |
1010 | ||
da066f3f | 1011 | return err; |
7405f9e1 PT |
1012 | } |
1013 | EXPORT_SYMBOL_GPL(nfs4_pnfs_ds_connect); | |
1014 | ||
6b7f3cf9 PT |
1015 | /* |
1016 | * Currently only supports ipv4, ipv6 and one multi-path address. | |
1017 | */ | |
1018 | struct nfs4_pnfs_ds_addr * | |
1019 | nfs4_decode_mp_ds_addr(struct net *net, struct xdr_stream *xdr, gfp_t gfp_flags) | |
1020 | { | |
1021 | struct nfs4_pnfs_ds_addr *da = NULL; | |
1022 | char *buf, *portstr; | |
1023 | __be16 port; | |
1024 | int nlen, rlen; | |
1025 | int tmp[2]; | |
1026 | __be32 *p; | |
1027 | char *netid, *match_netid; | |
1028 | size_t len, match_netid_len; | |
1029 | char *startsep = ""; | |
1030 | char *endsep = ""; | |
1031 | ||
1032 | ||
1033 | /* r_netid */ | |
1034 | p = xdr_inline_decode(xdr, 4); | |
1035 | if (unlikely(!p)) | |
1036 | goto out_err; | |
1037 | nlen = be32_to_cpup(p++); | |
1038 | ||
1039 | p = xdr_inline_decode(xdr, nlen); | |
1040 | if (unlikely(!p)) | |
1041 | goto out_err; | |
1042 | ||
1043 | netid = kmalloc(nlen+1, gfp_flags); | |
1044 | if (unlikely(!netid)) | |
1045 | goto out_err; | |
1046 | ||
1047 | netid[nlen] = '\0'; | |
1048 | memcpy(netid, p, nlen); | |
1049 | ||
1050 | /* r_addr: ip/ip6addr with port in dec octets - see RFC 5665 */ | |
1051 | p = xdr_inline_decode(xdr, 4); | |
1052 | if (unlikely(!p)) | |
1053 | goto out_free_netid; | |
1054 | rlen = be32_to_cpup(p); | |
1055 | ||
1056 | p = xdr_inline_decode(xdr, rlen); | |
1057 | if (unlikely(!p)) | |
1058 | goto out_free_netid; | |
1059 | ||
1060 | /* port is ".ABC.DEF", 8 chars max */ | |
1061 | if (rlen > INET6_ADDRSTRLEN + IPV6_SCOPE_ID_LEN + 8) { | |
1062 | dprintk("%s: Invalid address, length %d\n", __func__, | |
1063 | rlen); | |
1064 | goto out_free_netid; | |
1065 | } | |
1066 | buf = kmalloc(rlen + 1, gfp_flags); | |
1067 | if (!buf) { | |
1068 | dprintk("%s: Not enough memory\n", __func__); | |
1069 | goto out_free_netid; | |
1070 | } | |
1071 | buf[rlen] = '\0'; | |
1072 | memcpy(buf, p, rlen); | |
1073 | ||
1074 | /* replace port '.' with '-' */ | |
1075 | portstr = strrchr(buf, '.'); | |
1076 | if (!portstr) { | |
1077 | dprintk("%s: Failed finding expected dot in port\n", | |
1078 | __func__); | |
1079 | goto out_free_buf; | |
1080 | } | |
1081 | *portstr = '-'; | |
1082 | ||
1083 | /* find '.' between address and port */ | |
1084 | portstr = strrchr(buf, '.'); | |
1085 | if (!portstr) { | |
1086 | dprintk("%s: Failed finding expected dot between address and " | |
1087 | "port\n", __func__); | |
1088 | goto out_free_buf; | |
1089 | } | |
1090 | *portstr = '\0'; | |
1091 | ||
1092 | da = kzalloc(sizeof(*da), gfp_flags); | |
1093 | if (unlikely(!da)) | |
1094 | goto out_free_buf; | |
1095 | ||
1096 | INIT_LIST_HEAD(&da->da_node); | |
1097 | ||
1098 | if (!rpc_pton(net, buf, portstr-buf, (struct sockaddr *)&da->da_addr, | |
1099 | sizeof(da->da_addr))) { | |
1100 | dprintk("%s: error parsing address %s\n", __func__, buf); | |
1101 | goto out_free_da; | |
1102 | } | |
1103 | ||
1104 | portstr++; | |
1105 | sscanf(portstr, "%d-%d", &tmp[0], &tmp[1]); | |
1106 | port = htons((tmp[0] << 8) | (tmp[1])); | |
1107 | ||
1108 | switch (da->da_addr.ss_family) { | |
1109 | case AF_INET: | |
1110 | ((struct sockaddr_in *)&da->da_addr)->sin_port = port; | |
1111 | da->da_addrlen = sizeof(struct sockaddr_in); | |
1112 | match_netid = "tcp"; | |
1113 | match_netid_len = 3; | |
1114 | break; | |
1115 | ||
1116 | case AF_INET6: | |
1117 | ((struct sockaddr_in6 *)&da->da_addr)->sin6_port = port; | |
1118 | da->da_addrlen = sizeof(struct sockaddr_in6); | |
1119 | match_netid = "tcp6"; | |
1120 | match_netid_len = 4; | |
1121 | startsep = "["; | |
1122 | endsep = "]"; | |
1123 | break; | |
1124 | ||
1125 | default: | |
1126 | dprintk("%s: unsupported address family: %u\n", | |
1127 | __func__, da->da_addr.ss_family); | |
1128 | goto out_free_da; | |
1129 | } | |
1130 | ||
1131 | if (nlen != match_netid_len || strncmp(netid, match_netid, nlen)) { | |
1132 | dprintk("%s: ERROR: r_netid \"%s\" != \"%s\"\n", | |
1133 | __func__, netid, match_netid); | |
1134 | goto out_free_da; | |
1135 | } | |
1136 | ||
1137 | /* save human readable address */ | |
1138 | len = strlen(startsep) + strlen(buf) + strlen(endsep) + 7; | |
1139 | da->da_remotestr = kzalloc(len, gfp_flags); | |
1140 | ||
1141 | /* NULL is ok, only used for dprintk */ | |
1142 | if (da->da_remotestr) | |
1143 | snprintf(da->da_remotestr, len, "%s%s%s:%u", startsep, | |
1144 | buf, endsep, ntohs(port)); | |
1145 | ||
1146 | dprintk("%s: Parsed DS addr %s\n", __func__, da->da_remotestr); | |
1147 | kfree(buf); | |
1148 | kfree(netid); | |
1149 | return da; | |
1150 | ||
1151 | out_free_da: | |
1152 | kfree(da); | |
1153 | out_free_buf: | |
1154 | dprintk("%s: Error parsing DS addr: %s\n", __func__, buf); | |
1155 | kfree(buf); | |
1156 | out_free_netid: | |
1157 | kfree(netid); | |
1158 | out_err: | |
1159 | return NULL; | |
1160 | } | |
1161 | EXPORT_SYMBOL_GPL(nfs4_decode_mp_ds_addr); | |
338d00cf TH |
1162 | |
1163 | void | |
1164 | pnfs_layout_mark_request_commit(struct nfs_page *req, | |
1165 | struct pnfs_layout_segment *lseg, | |
1166 | struct nfs_commit_info *cinfo, | |
1167 | u32 ds_commit_idx) | |
1168 | { | |
1169 | struct list_head *list; | |
ba827c9a | 1170 | struct pnfs_commit_array *array; |
e18c18eb | 1171 | struct pnfs_commit_bucket *bucket; |
338d00cf | 1172 | |
e824f99a | 1173 | mutex_lock(&NFS_I(cinfo->inode)->commit_mutex); |
ba827c9a | 1174 | array = pnfs_lookup_commit_array(cinfo->ds, lseg); |
e18c18eb | 1175 | if (!array || !pnfs_is_valid_lseg(lseg)) |
ba827c9a | 1176 | goto out_resched; |
e18c18eb TM |
1177 | bucket = &array->buckets[ds_commit_idx]; |
1178 | list = &bucket->written; | |
1179 | /* Non-empty buckets hold a reference on the lseg. That ref | |
1180 | * is normally transferred to the COMMIT call and released | |
1181 | * there. It could also be released if the last req is pulled | |
1182 | * off due to a rewrite, in which case it will be done in | |
1183 | * pnfs_common_clear_request_commit | |
1184 | */ | |
1185 | if (!bucket->lseg) | |
1186 | bucket->lseg = pnfs_get_lseg(lseg); | |
338d00cf TH |
1187 | set_bit(PG_COMMIT_TO_DS, &req->wb_flags); |
1188 | cinfo->ds->nwritten++; | |
338d00cf | 1189 | |
86d80f97 | 1190 | nfs_request_add_commit_list_locked(req, list, cinfo); |
e824f99a | 1191 | mutex_unlock(&NFS_I(cinfo->inode)->commit_mutex); |
86d80f97 | 1192 | nfs_mark_page_unstable(req->wb_page, cinfo); |
ba827c9a TM |
1193 | return; |
1194 | out_resched: | |
1195 | mutex_unlock(&NFS_I(cinfo->inode)->commit_mutex); | |
1196 | cinfo->completion_ops->resched_write(cinfo, req); | |
338d00cf TH |
1197 | } |
1198 | EXPORT_SYMBOL_GPL(pnfs_layout_mark_request_commit); | |
5bb89b47 TM |
1199 | |
1200 | int | |
1201 | pnfs_nfs_generic_sync(struct inode *inode, bool datasync) | |
1202 | { | |
2e18d4d8 TM |
1203 | int ret; |
1204 | ||
1205 | if (!pnfs_layoutcommit_outstanding(inode)) | |
1206 | return 0; | |
1207 | ret = nfs_commit_inode(inode, FLUSH_SYNC); | |
1208 | if (ret < 0) | |
1209 | return ret; | |
5bb89b47 TM |
1210 | if (datasync) |
1211 | return 0; | |
1212 | return pnfs_layoutcommit_inode(inode, true); | |
1213 | } | |
1214 | EXPORT_SYMBOL_GPL(pnfs_nfs_generic_sync); | |
1215 |