Commit | Line | Data |
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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 | { | |
1757655d | 81 | struct pnfs_commit_bucket *bucket = NULL; |
f54bcf2e TH |
82 | |
83 | if (!test_and_clear_bit(PG_COMMIT_TO_DS, &req->wb_flags)) | |
84 | goto out; | |
85 | cinfo->ds->nwritten--; | |
1757655d | 86 | if (list_is_singular(&req->wb_list)) |
f54bcf2e | 87 | bucket = list_first_entry(&req->wb_list, |
1757655d | 88 | struct pnfs_commit_bucket, written); |
f54bcf2e TH |
89 | out: |
90 | nfs_request_remove_commit_list(req, cinfo); | |
1757655d TM |
91 | if (bucket) |
92 | pnfs_put_lseg(pnfs_free_bucket_lseg(bucket)); | |
f54bcf2e TH |
93 | } |
94 | EXPORT_SYMBOL_GPL(pnfs_generic_clear_request_commit); | |
95 | ||
d7242c46 TM |
96 | struct pnfs_commit_array * |
97 | pnfs_alloc_commit_array(size_t n, gfp_t gfp_flags) | |
98 | { | |
99 | struct pnfs_commit_array *p; | |
100 | struct pnfs_commit_bucket *b; | |
101 | ||
102 | p = kmalloc(struct_size(p, buckets, n), gfp_flags); | |
103 | if (!p) | |
104 | return NULL; | |
105 | p->nbuckets = n; | |
106 | INIT_LIST_HEAD(&p->cinfo_list); | |
107 | INIT_LIST_HEAD(&p->lseg_list); | |
108 | p->lseg = NULL; | |
109 | for (b = &p->buckets[0]; n != 0; b++, n--) { | |
110 | INIT_LIST_HEAD(&b->written); | |
111 | INIT_LIST_HEAD(&b->committing); | |
c84bea59 | 112 | b->lseg = NULL; |
d7242c46 TM |
113 | b->direct_verf.committed = NFS_INVALID_STABLE_HOW; |
114 | } | |
115 | return p; | |
116 | } | |
117 | EXPORT_SYMBOL_GPL(pnfs_alloc_commit_array); | |
118 | ||
119 | void | |
120 | pnfs_free_commit_array(struct pnfs_commit_array *p) | |
121 | { | |
122 | kfree_rcu(p, rcu); | |
123 | } | |
124 | EXPORT_SYMBOL_GPL(pnfs_free_commit_array); | |
125 | ||
ba827c9a TM |
126 | static struct pnfs_commit_array * |
127 | pnfs_find_commit_array_by_lseg(struct pnfs_ds_commit_info *fl_cinfo, | |
128 | struct pnfs_layout_segment *lseg) | |
129 | { | |
130 | struct pnfs_commit_array *array; | |
131 | ||
132 | list_for_each_entry_rcu(array, &fl_cinfo->commits, cinfo_list) { | |
133 | if (array->lseg == lseg) | |
134 | return array; | |
135 | } | |
136 | return NULL; | |
137 | } | |
138 | ||
139 | struct pnfs_commit_array * | |
140 | pnfs_add_commit_array(struct pnfs_ds_commit_info *fl_cinfo, | |
141 | struct pnfs_commit_array *new, | |
142 | struct pnfs_layout_segment *lseg) | |
143 | { | |
144 | struct pnfs_commit_array *array; | |
145 | ||
146 | array = pnfs_find_commit_array_by_lseg(fl_cinfo, lseg); | |
147 | if (array) | |
148 | return array; | |
149 | new->lseg = lseg; | |
150 | refcount_set(&new->refcount, 1); | |
151 | list_add_rcu(&new->cinfo_list, &fl_cinfo->commits); | |
152 | list_add(&new->lseg_list, &lseg->pls_commits); | |
153 | return new; | |
154 | } | |
155 | EXPORT_SYMBOL_GPL(pnfs_add_commit_array); | |
156 | ||
ba827c9a TM |
157 | static struct pnfs_commit_array * |
158 | pnfs_lookup_commit_array(struct pnfs_ds_commit_info *fl_cinfo, | |
159 | struct pnfs_layout_segment *lseg) | |
160 | { | |
161 | struct pnfs_commit_array *array; | |
162 | ||
163 | rcu_read_lock(); | |
164 | array = pnfs_find_commit_array_by_lseg(fl_cinfo, lseg); | |
165 | if (!array) { | |
166 | rcu_read_unlock(); | |
9c455a8c | 167 | fl_cinfo->ops->setup_ds_info(fl_cinfo, lseg); |
ba827c9a TM |
168 | rcu_read_lock(); |
169 | array = pnfs_find_commit_array_by_lseg(fl_cinfo, lseg); | |
170 | } | |
171 | rcu_read_unlock(); | |
172 | return array; | |
173 | } | |
174 | ||
a9901899 TM |
175 | static void |
176 | pnfs_release_commit_array_locked(struct pnfs_commit_array *array) | |
177 | { | |
178 | list_del_rcu(&array->cinfo_list); | |
179 | list_del(&array->lseg_list); | |
180 | pnfs_free_commit_array(array); | |
181 | } | |
182 | ||
183 | static void | |
184 | pnfs_put_commit_array_locked(struct pnfs_commit_array *array) | |
185 | { | |
186 | if (refcount_dec_and_test(&array->refcount)) | |
187 | pnfs_release_commit_array_locked(array); | |
188 | } | |
189 | ||
190 | static void | |
191 | pnfs_put_commit_array(struct pnfs_commit_array *array, struct inode *inode) | |
192 | { | |
193 | if (refcount_dec_and_lock(&array->refcount, &inode->i_lock)) { | |
194 | pnfs_release_commit_array_locked(array); | |
195 | spin_unlock(&inode->i_lock); | |
196 | } | |
197 | } | |
198 | ||
199 | static struct pnfs_commit_array * | |
200 | pnfs_get_commit_array(struct pnfs_commit_array *array) | |
201 | { | |
202 | if (refcount_inc_not_zero(&array->refcount)) | |
203 | return array; | |
204 | return NULL; | |
205 | } | |
206 | ||
207 | static void | |
208 | pnfs_remove_and_free_commit_array(struct pnfs_commit_array *array) | |
209 | { | |
210 | array->lseg = NULL; | |
211 | list_del_init(&array->lseg_list); | |
212 | pnfs_put_commit_array_locked(array); | |
213 | } | |
214 | ||
215 | void | |
216 | pnfs_generic_ds_cinfo_release_lseg(struct pnfs_ds_commit_info *fl_cinfo, | |
217 | struct pnfs_layout_segment *lseg) | |
218 | { | |
219 | struct pnfs_commit_array *array, *tmp; | |
220 | ||
221 | list_for_each_entry_safe(array, tmp, &lseg->pls_commits, lseg_list) | |
222 | pnfs_remove_and_free_commit_array(array); | |
223 | } | |
224 | EXPORT_SYMBOL_GPL(pnfs_generic_ds_cinfo_release_lseg); | |
225 | ||
226 | void | |
227 | pnfs_generic_ds_cinfo_destroy(struct pnfs_ds_commit_info *fl_cinfo) | |
228 | { | |
229 | struct pnfs_commit_array *array, *tmp; | |
230 | ||
231 | list_for_each_entry_safe(array, tmp, &fl_cinfo->commits, cinfo_list) | |
232 | pnfs_remove_and_free_commit_array(array); | |
233 | } | |
234 | EXPORT_SYMBOL_GPL(pnfs_generic_ds_cinfo_destroy); | |
235 | ||
a8e3765e TM |
236 | /* |
237 | * Locks the nfs_page requests for commit and moves them to | |
238 | * @bucket->committing. | |
239 | */ | |
f54bcf2e | 240 | static int |
a8e3765e TM |
241 | pnfs_bucket_scan_ds_commit_list(struct pnfs_commit_bucket *bucket, |
242 | struct nfs_commit_info *cinfo, | |
243 | int max) | |
f54bcf2e TH |
244 | { |
245 | struct list_head *src = &bucket->written; | |
246 | struct list_head *dst = &bucket->committing; | |
247 | int ret; | |
248 | ||
e824f99a | 249 | lockdep_assert_held(&NFS_I(cinfo->inode)->commit_mutex); |
5d2a9d9d | 250 | ret = nfs_scan_commit_list(src, dst, cinfo, max); |
f54bcf2e TH |
251 | if (ret) { |
252 | cinfo->ds->nwritten -= ret; | |
253 | cinfo->ds->ncommitting += ret; | |
f54bcf2e TH |
254 | } |
255 | return ret; | |
256 | } | |
257 | ||
a8e3765e TM |
258 | static int pnfs_bucket_scan_array(struct nfs_commit_info *cinfo, |
259 | struct pnfs_commit_bucket *buckets, | |
260 | unsigned int nbuckets, | |
261 | int max) | |
262 | { | |
263 | unsigned int i; | |
264 | int rv = 0, cnt; | |
265 | ||
266 | for (i = 0; i < nbuckets && max != 0; i++) { | |
267 | cnt = pnfs_bucket_scan_ds_commit_list(&buckets[i], cinfo, max); | |
268 | rv += cnt; | |
269 | max -= cnt; | |
270 | } | |
271 | return rv; | |
272 | } | |
273 | ||
085d1e33 TH |
274 | /* Move reqs from written to committing lists, returning count |
275 | * of number moved. | |
f54bcf2e | 276 | */ |
a8e3765e | 277 | int pnfs_generic_scan_commit_lists(struct nfs_commit_info *cinfo, int max) |
f54bcf2e | 278 | { |
a8e3765e TM |
279 | struct pnfs_ds_commit_info *fl_cinfo = cinfo->ds; |
280 | struct pnfs_commit_array *array; | |
281 | int rv = 0, cnt; | |
282 | ||
a9901899 TM |
283 | rcu_read_lock(); |
284 | list_for_each_entry_rcu(array, &fl_cinfo->commits, cinfo_list) { | |
285 | if (!array->lseg || !pnfs_get_commit_array(array)) | |
286 | continue; | |
287 | rcu_read_unlock(); | |
a8e3765e TM |
288 | cnt = pnfs_bucket_scan_array(cinfo, array->buckets, |
289 | array->nbuckets, max); | |
a9901899 TM |
290 | rcu_read_lock(); |
291 | pnfs_put_commit_array(array, cinfo->inode); | |
f54bcf2e | 292 | rv += cnt; |
a8e3765e TM |
293 | max -= cnt; |
294 | if (!max) | |
295 | break; | |
f54bcf2e | 296 | } |
a9901899 | 297 | rcu_read_unlock(); |
f54bcf2e TH |
298 | return rv; |
299 | } | |
300 | EXPORT_SYMBOL_GPL(pnfs_generic_scan_commit_lists); | |
301 | ||
fce9ed03 TM |
302 | static unsigned int |
303 | pnfs_bucket_recover_commit_reqs(struct list_head *dst, | |
304 | struct pnfs_commit_bucket *buckets, | |
305 | unsigned int nbuckets, | |
306 | struct nfs_commit_info *cinfo) | |
f54bcf2e TH |
307 | { |
308 | struct pnfs_commit_bucket *b; | |
309 | struct pnfs_layout_segment *freeme; | |
fce9ed03 TM |
310 | unsigned int nwritten, ret = 0; |
311 | unsigned int i; | |
f54bcf2e TH |
312 | |
313 | restart: | |
fce9ed03 | 314 | for (i = 0, b = buckets; i < nbuckets; i++, b++) { |
5d2a9d9d | 315 | nwritten = nfs_scan_commit_list(&b->written, dst, cinfo, 0); |
e39928f9 TM |
316 | if (!nwritten) |
317 | continue; | |
fce9ed03 | 318 | ret += nwritten; |
c84bea59 TM |
319 | freeme = pnfs_free_bucket_lseg(b); |
320 | if (freeme) { | |
f54bcf2e TH |
321 | pnfs_put_lseg(freeme); |
322 | goto restart; | |
323 | } | |
324 | } | |
fce9ed03 TM |
325 | return ret; |
326 | } | |
327 | ||
328 | /* Pull everything off the committing lists and dump into @dst. */ | |
329 | void pnfs_generic_recover_commit_reqs(struct list_head *dst, | |
330 | struct nfs_commit_info *cinfo) | |
331 | { | |
332 | struct pnfs_ds_commit_info *fl_cinfo = cinfo->ds; | |
333 | struct pnfs_commit_array *array; | |
334 | unsigned int nwritten; | |
335 | ||
336 | lockdep_assert_held(&NFS_I(cinfo->inode)->commit_mutex); | |
a9901899 TM |
337 | rcu_read_lock(); |
338 | list_for_each_entry_rcu(array, &fl_cinfo->commits, cinfo_list) { | |
339 | if (!array->lseg || !pnfs_get_commit_array(array)) | |
340 | continue; | |
341 | rcu_read_unlock(); | |
fce9ed03 TM |
342 | nwritten = pnfs_bucket_recover_commit_reqs(dst, |
343 | array->buckets, | |
344 | array->nbuckets, | |
345 | cinfo); | |
a9901899 TM |
346 | rcu_read_lock(); |
347 | pnfs_put_commit_array(array, cinfo->inode); | |
fce9ed03 TM |
348 | fl_cinfo->nwritten -= nwritten; |
349 | } | |
a9901899 | 350 | rcu_read_unlock(); |
f54bcf2e TH |
351 | } |
352 | EXPORT_SYMBOL_GPL(pnfs_generic_recover_commit_reqs); | |
353 | ||
fb6b53ba TM |
354 | static struct nfs_page * |
355 | pnfs_bucket_search_commit_reqs(struct pnfs_commit_bucket *buckets, | |
356 | unsigned int nbuckets, struct page *page) | |
357 | { | |
358 | struct nfs_page *req; | |
359 | struct pnfs_commit_bucket *b; | |
360 | unsigned int i; | |
361 | ||
362 | /* Linearly search the commit lists for each bucket until a matching | |
363 | * request is found */ | |
364 | for (i = 0, b = buckets; i < nbuckets; i++, b++) { | |
365 | list_for_each_entry(req, &b->written, wb_list) { | |
366 | if (req->wb_page == page) | |
367 | return req->wb_head; | |
368 | } | |
369 | list_for_each_entry(req, &b->committing, wb_list) { | |
370 | if (req->wb_page == page) | |
371 | return req->wb_head; | |
372 | } | |
373 | } | |
374 | return NULL; | |
375 | } | |
376 | ||
377 | /* pnfs_generic_search_commit_reqs - Search lists in @cinfo for the head reqest | |
378 | * for @page | |
379 | * @cinfo - commit info for current inode | |
380 | * @page - page to search for matching head request | |
381 | * | |
382 | * Returns a the head request if one is found, otherwise returns NULL. | |
383 | */ | |
384 | struct nfs_page * | |
385 | pnfs_generic_search_commit_reqs(struct nfs_commit_info *cinfo, struct page *page) | |
386 | { | |
387 | struct pnfs_ds_commit_info *fl_cinfo = cinfo->ds; | |
388 | struct pnfs_commit_array *array; | |
389 | struct nfs_page *req; | |
390 | ||
fb6b53ba TM |
391 | list_for_each_entry(array, &fl_cinfo->commits, cinfo_list) { |
392 | req = pnfs_bucket_search_commit_reqs(array->buckets, | |
393 | array->nbuckets, page); | |
394 | if (req) | |
395 | return req; | |
396 | } | |
397 | return NULL; | |
398 | } | |
399 | EXPORT_SYMBOL_GPL(pnfs_generic_search_commit_reqs); | |
400 | ||
19573c93 TM |
401 | static struct pnfs_layout_segment * |
402 | pnfs_bucket_get_committing(struct list_head *head, | |
403 | struct pnfs_commit_bucket *bucket, | |
404 | struct nfs_commit_info *cinfo) | |
f54bcf2e | 405 | { |
46c9ea1d | 406 | struct pnfs_layout_segment *lseg; |
41181886 | 407 | struct list_head *pos; |
19573c93 TM |
408 | |
409 | list_for_each(pos, &bucket->committing) | |
410 | cinfo->ds->ncommitting--; | |
411 | list_splice_init(&bucket->committing, head); | |
46c9ea1d TM |
412 | lseg = pnfs_free_bucket_lseg(bucket); |
413 | if (!lseg) | |
414 | lseg = pnfs_get_lseg(bucket->lseg); | |
415 | return lseg; | |
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); | |
427 | return data; | |
428 | } | |
429 | ||
430 | static void pnfs_generic_retry_commit(struct pnfs_commit_bucket *buckets, | |
431 | unsigned int nbuckets, | |
432 | struct nfs_commit_info *cinfo, | |
433 | unsigned int idx) | |
434 | { | |
435 | struct pnfs_commit_bucket *bucket; | |
436 | struct pnfs_layout_segment *freeme; | |
27571297 | 437 | LIST_HEAD(pages); |
f54bcf2e | 438 | |
19573c93 | 439 | for (bucket = buckets; idx < nbuckets; bucket++, idx++) { |
f54bcf2e TH |
440 | if (list_empty(&bucket->committing)) |
441 | continue; | |
19573c93 TM |
442 | mutex_lock(&NFS_I(cinfo->inode)->commit_mutex); |
443 | freeme = pnfs_bucket_get_committing(&pages, bucket, cinfo); | |
d0fbb1d8 | 444 | mutex_unlock(&NFS_I(cinfo->inode)->commit_mutex); |
19573c93 | 445 | nfs_retry_commit(&pages, freeme, cinfo, idx); |
f54bcf2e TH |
446 | pnfs_put_lseg(freeme); |
447 | } | |
448 | } | |
449 | ||
450 | static unsigned int | |
19573c93 TM |
451 | pnfs_bucket_alloc_ds_commits(struct list_head *list, |
452 | struct pnfs_commit_bucket *buckets, | |
453 | unsigned int nbuckets, | |
454 | struct nfs_commit_info *cinfo) | |
f54bcf2e | 455 | { |
f54bcf2e TH |
456 | struct pnfs_commit_bucket *bucket; |
457 | struct nfs_commit_data *data; | |
19573c93 | 458 | unsigned int i; |
f54bcf2e TH |
459 | unsigned int nreq = 0; |
460 | ||
19573c93 | 461 | for (i = 0, bucket = buckets; i < nbuckets; i++, bucket++) { |
f54bcf2e TH |
462 | if (list_empty(&bucket->committing)) |
463 | continue; | |
19573c93 TM |
464 | mutex_lock(&NFS_I(cinfo->inode)->commit_mutex); |
465 | if (!list_empty(&bucket->committing)) { | |
466 | data = pnfs_bucket_fetch_commitdata(bucket, cinfo); | |
467 | if (!data) | |
468 | goto out_error; | |
469 | data->ds_commit_index = i; | |
470 | list_add_tail(&data->list, list); | |
471 | atomic_inc(&cinfo->mds->rpcs_out); | |
472 | nreq++; | |
473 | } | |
474 | mutex_unlock(&NFS_I(cinfo->inode)->commit_mutex); | |
f54bcf2e | 475 | } |
f54bcf2e | 476 | return nreq; |
19573c93 | 477 | out_error: |
d0fbb1d8 | 478 | mutex_unlock(&NFS_I(cinfo->inode)->commit_mutex); |
19573c93 TM |
479 | /* Clean up on error */ |
480 | pnfs_generic_retry_commit(buckets, nbuckets, cinfo, i); | |
481 | return nreq; | |
ade8febd WAA |
482 | } |
483 | ||
0cb1f6df TM |
484 | static unsigned int |
485 | pnfs_alloc_ds_commits_list(struct list_head *list, | |
486 | struct pnfs_ds_commit_info *fl_cinfo, | |
487 | struct nfs_commit_info *cinfo) | |
488 | { | |
489 | struct pnfs_commit_array *array; | |
490 | unsigned int ret = 0; | |
491 | ||
a9901899 TM |
492 | rcu_read_lock(); |
493 | list_for_each_entry_rcu(array, &fl_cinfo->commits, cinfo_list) { | |
494 | if (!array->lseg || !pnfs_get_commit_array(array)) | |
495 | continue; | |
496 | rcu_read_unlock(); | |
0cb1f6df TM |
497 | ret += pnfs_bucket_alloc_ds_commits(list, array->buckets, |
498 | array->nbuckets, cinfo); | |
a9901899 TM |
499 | rcu_read_lock(); |
500 | pnfs_put_commit_array(array, cinfo->inode); | |
501 | } | |
27d231c0 | 502 | rcu_read_unlock(); |
0cb1f6df TM |
503 | return ret; |
504 | } | |
505 | ||
f54bcf2e TH |
506 | /* This follows nfs_commit_list pretty closely */ |
507 | int | |
508 | pnfs_generic_commit_pagelist(struct inode *inode, struct list_head *mds_pages, | |
509 | int how, struct nfs_commit_info *cinfo, | |
510 | int (*initiate_commit)(struct nfs_commit_data *data, | |
511 | int how)) | |
512 | { | |
19573c93 | 513 | struct pnfs_ds_commit_info *fl_cinfo = cinfo->ds; |
f54bcf2e TH |
514 | struct nfs_commit_data *data, *tmp; |
515 | LIST_HEAD(list); | |
516 | unsigned int nreq = 0; | |
517 | ||
518 | if (!list_empty(mds_pages)) { | |
518662e0 N |
519 | data = nfs_commitdata_alloc(true); |
520 | data->ds_commit_index = -1; | |
19573c93 TM |
521 | list_splice_init(mds_pages, &data->pages); |
522 | list_add_tail(&data->list, &list); | |
523 | atomic_inc(&cinfo->mds->rpcs_out); | |
518662e0 | 524 | nreq++; |
f54bcf2e TH |
525 | } |
526 | ||
0cb1f6df | 527 | nreq += pnfs_alloc_ds_commits_list(&list, fl_cinfo, cinfo); |
af7cf057 | 528 | if (nreq == 0) |
f54bcf2e | 529 | goto out; |
f54bcf2e | 530 | |
19573c93 TM |
531 | list_for_each_entry_safe(data, tmp, &list, list) { |
532 | list_del(&data->list); | |
27571297 | 533 | if (data->ds_commit_index < 0) { |
19573c93 | 534 | nfs_init_commit(data, NULL, NULL, cinfo); |
f54bcf2e | 535 | nfs_initiate_commit(NFS_CLIENT(inode), data, |
c36aae9a | 536 | NFS_PROTO(data->inode), |
4fa7ef69 TM |
537 | data->mds_ops, how, |
538 | RPC_TASK_CRED_NOREF); | |
f54bcf2e | 539 | } else { |
19573c93 | 540 | nfs_init_commit(data, NULL, data->lseg, cinfo); |
f54bcf2e TH |
541 | initiate_commit(data, how); |
542 | } | |
543 | } | |
544 | out: | |
f54bcf2e TH |
545 | return PNFS_ATTEMPTED; |
546 | } | |
547 | EXPORT_SYMBOL_GPL(pnfs_generic_commit_pagelist); | |
875ae069 PT |
548 | |
549 | /* | |
550 | * Data server cache | |
551 | * | |
552 | * Data servers can be mapped to different device ids. | |
553 | * nfs4_pnfs_ds reference counting | |
554 | * - set to 1 on allocation | |
555 | * - incremented when a device id maps a data server already in the cache. | |
556 | * - decremented when deviceid is removed from the cache. | |
557 | */ | |
558 | static DEFINE_SPINLOCK(nfs4_ds_cache_lock); | |
559 | static LIST_HEAD(nfs4_data_server_cache); | |
560 | ||
561 | /* Debug routines */ | |
562 | static void | |
563 | print_ds(struct nfs4_pnfs_ds *ds) | |
564 | { | |
565 | if (ds == NULL) { | |
566 | printk(KERN_WARNING "%s NULL device\n", __func__); | |
567 | return; | |
568 | } | |
569 | printk(KERN_WARNING " ds %s\n" | |
570 | " ref count %d\n" | |
571 | " client %p\n" | |
572 | " cl_exchange_flags %x\n", | |
573 | ds->ds_remotestr, | |
a2a5dea7 | 574 | refcount_read(&ds->ds_count), ds->ds_clp, |
875ae069 PT |
575 | ds->ds_clp ? ds->ds_clp->cl_exchange_flags : 0); |
576 | } | |
577 | ||
578 | static bool | |
579 | same_sockaddr(struct sockaddr *addr1, struct sockaddr *addr2) | |
580 | { | |
581 | struct sockaddr_in *a, *b; | |
582 | struct sockaddr_in6 *a6, *b6; | |
583 | ||
584 | if (addr1->sa_family != addr2->sa_family) | |
585 | return false; | |
586 | ||
587 | switch (addr1->sa_family) { | |
588 | case AF_INET: | |
589 | a = (struct sockaddr_in *)addr1; | |
590 | b = (struct sockaddr_in *)addr2; | |
591 | ||
592 | if (a->sin_addr.s_addr == b->sin_addr.s_addr && | |
593 | a->sin_port == b->sin_port) | |
594 | return true; | |
595 | break; | |
596 | ||
597 | case AF_INET6: | |
598 | a6 = (struct sockaddr_in6 *)addr1; | |
599 | b6 = (struct sockaddr_in6 *)addr2; | |
600 | ||
601 | /* LINKLOCAL addresses must have matching scope_id */ | |
602 | if (ipv6_addr_src_scope(&a6->sin6_addr) == | |
603 | IPV6_ADDR_SCOPE_LINKLOCAL && | |
604 | a6->sin6_scope_id != b6->sin6_scope_id) | |
605 | return false; | |
606 | ||
607 | if (ipv6_addr_equal(&a6->sin6_addr, &b6->sin6_addr) && | |
608 | a6->sin6_port == b6->sin6_port) | |
609 | return true; | |
610 | break; | |
611 | ||
612 | default: | |
613 | dprintk("%s: unhandled address family: %u\n", | |
614 | __func__, addr1->sa_family); | |
615 | return false; | |
616 | } | |
617 | ||
618 | return false; | |
619 | } | |
620 | ||
6f536936 TM |
621 | /* |
622 | * Checks if 'dsaddrs1' contains a subset of 'dsaddrs2'. If it does, | |
623 | * declare a match. | |
624 | */ | |
875ae069 PT |
625 | static bool |
626 | _same_data_server_addrs_locked(const struct list_head *dsaddrs1, | |
627 | const struct list_head *dsaddrs2) | |
628 | { | |
629 | struct nfs4_pnfs_ds_addr *da1, *da2; | |
6f536936 TM |
630 | struct sockaddr *sa1, *sa2; |
631 | bool match = false; | |
632 | ||
633 | list_for_each_entry(da1, dsaddrs1, da_node) { | |
634 | sa1 = (struct sockaddr *)&da1->da_addr; | |
635 | match = false; | |
636 | list_for_each_entry(da2, dsaddrs2, da_node) { | |
637 | sa2 = (struct sockaddr *)&da2->da_addr; | |
638 | match = same_sockaddr(sa1, sa2); | |
639 | if (match) | |
640 | break; | |
641 | } | |
642 | if (!match) | |
643 | break; | |
875ae069 | 644 | } |
6f536936 | 645 | return match; |
875ae069 PT |
646 | } |
647 | ||
648 | /* | |
649 | * Lookup DS by addresses. nfs4_ds_cache_lock is held | |
650 | */ | |
651 | static struct nfs4_pnfs_ds * | |
652 | _data_server_lookup_locked(const struct list_head *dsaddrs) | |
653 | { | |
654 | struct nfs4_pnfs_ds *ds; | |
655 | ||
656 | list_for_each_entry(ds, &nfs4_data_server_cache, ds_node) | |
657 | if (_same_data_server_addrs_locked(&ds->ds_addrs, dsaddrs)) | |
658 | return ds; | |
659 | return NULL; | |
660 | } | |
661 | ||
190c75a3 TM |
662 | static struct nfs4_pnfs_ds_addr *nfs4_pnfs_ds_addr_alloc(gfp_t gfp_flags) |
663 | { | |
664 | struct nfs4_pnfs_ds_addr *da = kzalloc(sizeof(*da), gfp_flags); | |
665 | if (da) | |
666 | INIT_LIST_HEAD(&da->da_node); | |
667 | return da; | |
668 | } | |
669 | ||
670 | static void nfs4_pnfs_ds_addr_free(struct nfs4_pnfs_ds_addr *da) | |
671 | { | |
672 | kfree(da->da_remotestr); | |
4be78d26 | 673 | kfree(da->da_netid); |
190c75a3 TM |
674 | kfree(da); |
675 | } | |
676 | ||
875ae069 PT |
677 | static void destroy_ds(struct nfs4_pnfs_ds *ds) |
678 | { | |
679 | struct nfs4_pnfs_ds_addr *da; | |
680 | ||
681 | dprintk("--> %s\n", __func__); | |
682 | ifdebug(FACILITY) | |
683 | print_ds(ds); | |
684 | ||
685 | nfs_put_client(ds->ds_clp); | |
686 | ||
687 | while (!list_empty(&ds->ds_addrs)) { | |
688 | da = list_first_entry(&ds->ds_addrs, | |
689 | struct nfs4_pnfs_ds_addr, | |
690 | da_node); | |
691 | list_del_init(&da->da_node); | |
190c75a3 | 692 | nfs4_pnfs_ds_addr_free(da); |
875ae069 PT |
693 | } |
694 | ||
695 | kfree(ds->ds_remotestr); | |
696 | kfree(ds); | |
697 | } | |
698 | ||
699 | void nfs4_pnfs_ds_put(struct nfs4_pnfs_ds *ds) | |
700 | { | |
a2a5dea7 | 701 | if (refcount_dec_and_lock(&ds->ds_count, |
875ae069 PT |
702 | &nfs4_ds_cache_lock)) { |
703 | list_del_init(&ds->ds_node); | |
704 | spin_unlock(&nfs4_ds_cache_lock); | |
705 | destroy_ds(ds); | |
706 | } | |
707 | } | |
708 | EXPORT_SYMBOL_GPL(nfs4_pnfs_ds_put); | |
709 | ||
710 | /* | |
711 | * Create a string with a human readable address and port to avoid | |
712 | * complicated setup around many dprinks. | |
713 | */ | |
714 | static char * | |
715 | nfs4_pnfs_remotestr(struct list_head *dsaddrs, gfp_t gfp_flags) | |
716 | { | |
717 | struct nfs4_pnfs_ds_addr *da; | |
718 | char *remotestr; | |
719 | size_t len; | |
720 | char *p; | |
721 | ||
722 | len = 3; /* '{', '}' and eol */ | |
723 | list_for_each_entry(da, dsaddrs, da_node) { | |
724 | len += strlen(da->da_remotestr) + 1; /* string plus comma */ | |
725 | } | |
726 | ||
727 | remotestr = kzalloc(len, gfp_flags); | |
728 | if (!remotestr) | |
729 | return NULL; | |
730 | ||
731 | p = remotestr; | |
732 | *(p++) = '{'; | |
733 | len--; | |
734 | list_for_each_entry(da, dsaddrs, da_node) { | |
735 | size_t ll = strlen(da->da_remotestr); | |
736 | ||
737 | if (ll > len) | |
738 | goto out_err; | |
739 | ||
740 | memcpy(p, da->da_remotestr, ll); | |
741 | p += ll; | |
742 | len -= ll; | |
743 | ||
744 | if (len < 1) | |
745 | goto out_err; | |
746 | (*p++) = ','; | |
747 | len--; | |
748 | } | |
749 | if (len < 2) | |
750 | goto out_err; | |
751 | *(p++) = '}'; | |
752 | *p = '\0'; | |
753 | return remotestr; | |
754 | out_err: | |
755 | kfree(remotestr); | |
756 | return NULL; | |
757 | } | |
758 | ||
759 | /* | |
760 | * Given a list of multipath struct nfs4_pnfs_ds_addr, add it to ds cache if | |
761 | * uncached and return cached struct nfs4_pnfs_ds. | |
762 | */ | |
763 | struct nfs4_pnfs_ds * | |
764 | nfs4_pnfs_ds_add(struct list_head *dsaddrs, gfp_t gfp_flags) | |
765 | { | |
766 | struct nfs4_pnfs_ds *tmp_ds, *ds = NULL; | |
767 | char *remotestr; | |
768 | ||
769 | if (list_empty(dsaddrs)) { | |
770 | dprintk("%s: no addresses defined\n", __func__); | |
771 | goto out; | |
772 | } | |
773 | ||
774 | ds = kzalloc(sizeof(*ds), gfp_flags); | |
775 | if (!ds) | |
776 | goto out; | |
777 | ||
778 | /* this is only used for debugging, so it's ok if its NULL */ | |
779 | remotestr = nfs4_pnfs_remotestr(dsaddrs, gfp_flags); | |
780 | ||
781 | spin_lock(&nfs4_ds_cache_lock); | |
782 | tmp_ds = _data_server_lookup_locked(dsaddrs); | |
783 | if (tmp_ds == NULL) { | |
784 | INIT_LIST_HEAD(&ds->ds_addrs); | |
785 | list_splice_init(dsaddrs, &ds->ds_addrs); | |
786 | ds->ds_remotestr = remotestr; | |
a2a5dea7 | 787 | refcount_set(&ds->ds_count, 1); |
875ae069 PT |
788 | INIT_LIST_HEAD(&ds->ds_node); |
789 | ds->ds_clp = NULL; | |
790 | list_add(&ds->ds_node, &nfs4_data_server_cache); | |
791 | dprintk("%s add new data server %s\n", __func__, | |
792 | ds->ds_remotestr); | |
793 | } else { | |
794 | kfree(remotestr); | |
795 | kfree(ds); | |
a2a5dea7 | 796 | refcount_inc(&tmp_ds->ds_count); |
875ae069 PT |
797 | dprintk("%s data server %s found, inc'ed ds_count to %d\n", |
798 | __func__, tmp_ds->ds_remotestr, | |
a2a5dea7 | 799 | refcount_read(&tmp_ds->ds_count)); |
875ae069 PT |
800 | ds = tmp_ds; |
801 | } | |
802 | spin_unlock(&nfs4_ds_cache_lock); | |
803 | out: | |
804 | return ds; | |
805 | } | |
806 | EXPORT_SYMBOL_GPL(nfs4_pnfs_ds_add); | |
6b7f3cf9 | 807 | |
7405f9e1 PT |
808 | static void nfs4_wait_ds_connect(struct nfs4_pnfs_ds *ds) |
809 | { | |
810 | might_sleep(); | |
811 | wait_on_bit(&ds->ds_state, NFS4DS_CONNECTING, | |
812 | TASK_KILLABLE); | |
813 | } | |
814 | ||
815 | static void nfs4_clear_ds_conn_bit(struct nfs4_pnfs_ds *ds) | |
816 | { | |
817 | smp_mb__before_atomic(); | |
818 | clear_bit(NFS4DS_CONNECTING, &ds->ds_state); | |
819 | smp_mb__after_atomic(); | |
820 | wake_up_bit(&ds->ds_state, NFS4DS_CONNECTING); | |
821 | } | |
822 | ||
5f01d953 | 823 | static struct nfs_client *(*get_v3_ds_connect)( |
b224f7cb | 824 | struct nfs_server *mds_srv, |
5f01d953 PT |
825 | const struct sockaddr *ds_addr, |
826 | int ds_addrlen, | |
827 | int ds_proto, | |
828 | unsigned int ds_timeo, | |
7d38de3f | 829 | unsigned int ds_retrans); |
5f01d953 PT |
830 | |
831 | static bool load_v3_ds_connect(void) | |
832 | { | |
833 | if (!get_v3_ds_connect) { | |
834 | get_v3_ds_connect = symbol_request(nfs3_set_ds_client); | |
835 | WARN_ON_ONCE(!get_v3_ds_connect); | |
836 | } | |
837 | ||
838 | return(get_v3_ds_connect != NULL); | |
839 | } | |
840 | ||
df137bc1 | 841 | void nfs4_pnfs_v3_ds_connect_unload(void) |
5f01d953 PT |
842 | { |
843 | if (get_v3_ds_connect) { | |
844 | symbol_put(nfs3_set_ds_client); | |
845 | get_v3_ds_connect = NULL; | |
846 | } | |
847 | } | |
5f01d953 PT |
848 | |
849 | static int _nfs4_pnfs_v3_ds_connect(struct nfs_server *mds_srv, | |
850 | struct nfs4_pnfs_ds *ds, | |
851 | unsigned int timeo, | |
7d38de3f | 852 | unsigned int retrans) |
5f01d953 PT |
853 | { |
854 | struct nfs_client *clp = ERR_PTR(-EIO); | |
855 | struct nfs4_pnfs_ds_addr *da; | |
856 | int status = 0; | |
857 | ||
7d38de3f | 858 | dprintk("--> %s DS %s\n", __func__, ds->ds_remotestr); |
5f01d953 PT |
859 | |
860 | if (!load_v3_ds_connect()) | |
861 | goto out; | |
862 | ||
863 | list_for_each_entry(da, &ds->ds_addrs, da_node) { | |
864 | dprintk("%s: DS %s: trying address %s\n", | |
865 | __func__, ds->ds_remotestr, da->da_remotestr); | |
866 | ||
fc821d59 TM |
867 | if (!IS_ERR(clp)) { |
868 | struct xprt_create xprt_args = { | |
4be78d26 | 869 | .ident = da->da_transport, |
fc821d59 TM |
870 | .net = clp->cl_net, |
871 | .dstaddr = (struct sockaddr *)&da->da_addr, | |
872 | .addrlen = da->da_addrlen, | |
873 | .servername = clp->cl_hostname, | |
874 | }; | |
a12f996d | 875 | |
4be78d26 TM |
876 | if (da->da_transport != clp->cl_proto) |
877 | continue; | |
a12f996d TM |
878 | if (da->da_addr.ss_family != clp->cl_addr.ss_family) |
879 | continue; | |
fc821d59 TM |
880 | /* Add this address as an alias */ |
881 | rpc_clnt_add_xprt(clp->cl_rpcclient, &xprt_args, | |
882 | rpc_clnt_test_and_add_xprt, NULL); | |
bf2bf9b8 TM |
883 | continue; |
884 | } | |
885 | clp = get_v3_ds_connect(mds_srv, | |
886 | (struct sockaddr *)&da->da_addr, | |
4be78d26 | 887 | da->da_addrlen, da->da_transport, |
bf2bf9b8 TM |
888 | timeo, retrans); |
889 | if (IS_ERR(clp)) | |
890 | continue; | |
891 | clp->cl_rpcclient->cl_softerr = 0; | |
892 | clp->cl_rpcclient->cl_softrtry = 0; | |
5f01d953 PT |
893 | } |
894 | ||
895 | if (IS_ERR(clp)) { | |
896 | status = PTR_ERR(clp); | |
897 | goto out; | |
898 | } | |
899 | ||
900 | smp_wmb(); | |
901 | ds->ds_clp = clp; | |
902 | dprintk("%s [new] addr: %s\n", __func__, ds->ds_remotestr); | |
903 | out: | |
904 | return status; | |
905 | } | |
906 | ||
907 | static int _nfs4_pnfs_v4_ds_connect(struct nfs_server *mds_srv, | |
7405f9e1 PT |
908 | struct nfs4_pnfs_ds *ds, |
909 | unsigned int timeo, | |
064172f3 | 910 | unsigned int retrans, |
7d38de3f | 911 | u32 minor_version) |
7405f9e1 PT |
912 | { |
913 | struct nfs_client *clp = ERR_PTR(-EIO); | |
914 | struct nfs4_pnfs_ds_addr *da; | |
915 | int status = 0; | |
916 | ||
7d38de3f | 917 | dprintk("--> %s DS %s\n", __func__, ds->ds_remotestr); |
7405f9e1 PT |
918 | |
919 | list_for_each_entry(da, &ds->ds_addrs, da_node) { | |
920 | dprintk("%s: DS %s: trying address %s\n", | |
921 | __func__, ds->ds_remotestr, da->da_remotestr); | |
922 | ||
04fa2c6b AA |
923 | if (!IS_ERR(clp) && clp->cl_mvops->session_trunk) { |
924 | struct xprt_create xprt_args = { | |
4be78d26 | 925 | .ident = da->da_transport, |
04fa2c6b AA |
926 | .net = clp->cl_net, |
927 | .dstaddr = (struct sockaddr *)&da->da_addr, | |
928 | .addrlen = da->da_addrlen, | |
929 | .servername = clp->cl_hostname, | |
930 | }; | |
931 | struct nfs4_add_xprt_data xprtdata = { | |
932 | .clp = clp, | |
04fa2c6b AA |
933 | }; |
934 | struct rpc_add_xprt_test rpcdata = { | |
935 | .add_xprt_test = clp->cl_mvops->session_trunk, | |
936 | .data = &xprtdata, | |
937 | }; | |
938 | ||
4be78d26 TM |
939 | if (da->da_transport != clp->cl_proto) |
940 | continue; | |
a12f996d TM |
941 | if (da->da_addr.ss_family != clp->cl_addr.ss_family) |
942 | continue; | |
04fa2c6b AA |
943 | /** |
944 | * Test this address for session trunking and | |
945 | * add as an alias | |
946 | */ | |
a12f996d | 947 | xprtdata.cred = nfs4_get_clid_cred(clp), |
04fa2c6b AA |
948 | rpc_clnt_add_xprt(clp->cl_rpcclient, &xprt_args, |
949 | rpc_clnt_setup_test_and_add_xprt, | |
950 | &rpcdata); | |
951 | if (xprtdata.cred) | |
a52458b4 | 952 | put_cred(xprtdata.cred); |
04fa2c6b AA |
953 | } else { |
954 | clp = nfs4_set_ds_client(mds_srv, | |
955 | (struct sockaddr *)&da->da_addr, | |
4be78d26 TM |
956 | da->da_addrlen, |
957 | da->da_transport, timeo, | |
958 | retrans, minor_version); | |
04fa2c6b AA |
959 | if (IS_ERR(clp)) |
960 | continue; | |
961 | ||
962 | status = nfs4_init_ds_session(clp, | |
963 | mds_srv->nfs_client->cl_lease_time); | |
964 | if (status) { | |
965 | nfs_put_client(clp); | |
966 | clp = ERR_PTR(-EIO); | |
967 | continue; | |
968 | } | |
969 | ||
970 | } | |
7405f9e1 PT |
971 | } |
972 | ||
973 | if (IS_ERR(clp)) { | |
974 | status = PTR_ERR(clp); | |
975 | goto out; | |
976 | } | |
977 | ||
7405f9e1 PT |
978 | smp_wmb(); |
979 | ds->ds_clp = clp; | |
980 | dprintk("%s [new] addr: %s\n", __func__, ds->ds_remotestr); | |
981 | out: | |
982 | return status; | |
7405f9e1 PT |
983 | } |
984 | ||
985 | /* | |
986 | * Create an rpc connection to the nfs4_pnfs_ds data server. | |
987 | * Currently only supports IPv4 and IPv6 addresses. | |
a33e4b03 | 988 | * If connection fails, make devid unavailable and return a -errno. |
7405f9e1 | 989 | */ |
a33e4b03 | 990 | int nfs4_pnfs_ds_connect(struct nfs_server *mds_srv, struct nfs4_pnfs_ds *ds, |
7405f9e1 | 991 | struct nfs4_deviceid_node *devid, unsigned int timeo, |
7d38de3f | 992 | unsigned int retrans, u32 version, u32 minor_version) |
7405f9e1 | 993 | { |
da066f3f | 994 | int err; |
7405f9e1 | 995 | |
da066f3f WAA |
996 | again: |
997 | err = 0; | |
998 | if (test_and_set_bit(NFS4DS_CONNECTING, &ds->ds_state) == 0) { | |
5f01d953 PT |
999 | if (version == 3) { |
1000 | err = _nfs4_pnfs_v3_ds_connect(mds_srv, ds, timeo, | |
7d38de3f | 1001 | retrans); |
5f01d953 PT |
1002 | } else if (version == 4) { |
1003 | err = _nfs4_pnfs_v4_ds_connect(mds_srv, ds, timeo, | |
7d38de3f | 1004 | retrans, minor_version); |
5f01d953 PT |
1005 | } else { |
1006 | dprintk("%s: unsupported DS version %d\n", __func__, | |
1007 | version); | |
1008 | err = -EPROTONOSUPPORT; | |
1009 | } | |
1010 | ||
7405f9e1 PT |
1011 | nfs4_clear_ds_conn_bit(ds); |
1012 | } else { | |
1013 | nfs4_wait_ds_connect(ds); | |
da066f3f WAA |
1014 | |
1015 | /* what was waited on didn't connect AND didn't mark unavail */ | |
1016 | if (!ds->ds_clp && !nfs4_test_deviceid_unavailable(devid)) | |
1017 | goto again; | |
7405f9e1 | 1018 | } |
a33e4b03 WAA |
1019 | |
1020 | /* | |
1021 | * At this point the ds->ds_clp should be ready, but it might have | |
1022 | * hit an error. | |
1023 | */ | |
da066f3f WAA |
1024 | if (!err) { |
1025 | if (!ds->ds_clp || !nfs_client_init_is_complete(ds->ds_clp)) { | |
1026 | WARN_ON_ONCE(ds->ds_clp || | |
1027 | !nfs4_test_deviceid_unavailable(devid)); | |
1028 | return -EINVAL; | |
1029 | } | |
1030 | err = nfs_client_init_status(ds->ds_clp); | |
a33e4b03 WAA |
1031 | } |
1032 | ||
da066f3f | 1033 | return err; |
7405f9e1 PT |
1034 | } |
1035 | EXPORT_SYMBOL_GPL(nfs4_pnfs_ds_connect); | |
1036 | ||
6b7f3cf9 PT |
1037 | /* |
1038 | * Currently only supports ipv4, ipv6 and one multi-path address. | |
1039 | */ | |
1040 | struct nfs4_pnfs_ds_addr * | |
1041 | nfs4_decode_mp_ds_addr(struct net *net, struct xdr_stream *xdr, gfp_t gfp_flags) | |
1042 | { | |
1043 | struct nfs4_pnfs_ds_addr *da = NULL; | |
1044 | char *buf, *portstr; | |
1045 | __be16 port; | |
98899813 | 1046 | ssize_t nlen, rlen; |
6b7f3cf9 | 1047 | int tmp[2]; |
4be78d26 TM |
1048 | char *netid; |
1049 | size_t len; | |
6b7f3cf9 PT |
1050 | char *startsep = ""; |
1051 | char *endsep = ""; | |
1052 | ||
1053 | ||
1054 | /* r_netid */ | |
98899813 TM |
1055 | nlen = xdr_stream_decode_string_dup(xdr, &netid, XDR_MAX_NETOBJ, |
1056 | gfp_flags); | |
1057 | if (unlikely(nlen < 0)) | |
6b7f3cf9 | 1058 | goto out_err; |
6b7f3cf9 PT |
1059 | |
1060 | /* r_addr: ip/ip6addr with port in dec octets - see RFC 5665 */ | |
6b7f3cf9 | 1061 | /* port is ".ABC.DEF", 8 chars max */ |
98899813 TM |
1062 | rlen = xdr_stream_decode_string_dup(xdr, &buf, INET6_ADDRSTRLEN + |
1063 | IPV6_SCOPE_ID_LEN + 8, gfp_flags); | |
1064 | if (unlikely(rlen < 0)) | |
6b7f3cf9 | 1065 | goto out_free_netid; |
6b7f3cf9 PT |
1066 | |
1067 | /* replace port '.' with '-' */ | |
1068 | portstr = strrchr(buf, '.'); | |
1069 | if (!portstr) { | |
1070 | dprintk("%s: Failed finding expected dot in port\n", | |
1071 | __func__); | |
1072 | goto out_free_buf; | |
1073 | } | |
1074 | *portstr = '-'; | |
1075 | ||
1076 | /* find '.' between address and port */ | |
1077 | portstr = strrchr(buf, '.'); | |
1078 | if (!portstr) { | |
1079 | dprintk("%s: Failed finding expected dot between address and " | |
1080 | "port\n", __func__); | |
1081 | goto out_free_buf; | |
1082 | } | |
1083 | *portstr = '\0'; | |
1084 | ||
190c75a3 | 1085 | da = nfs4_pnfs_ds_addr_alloc(gfp_flags); |
6b7f3cf9 PT |
1086 | if (unlikely(!da)) |
1087 | goto out_free_buf; | |
1088 | ||
6b7f3cf9 PT |
1089 | if (!rpc_pton(net, buf, portstr-buf, (struct sockaddr *)&da->da_addr, |
1090 | sizeof(da->da_addr))) { | |
1091 | dprintk("%s: error parsing address %s\n", __func__, buf); | |
1092 | goto out_free_da; | |
1093 | } | |
1094 | ||
1095 | portstr++; | |
1096 | sscanf(portstr, "%d-%d", &tmp[0], &tmp[1]); | |
1097 | port = htons((tmp[0] << 8) | (tmp[1])); | |
1098 | ||
1099 | switch (da->da_addr.ss_family) { | |
1100 | case AF_INET: | |
1101 | ((struct sockaddr_in *)&da->da_addr)->sin_port = port; | |
1102 | da->da_addrlen = sizeof(struct sockaddr_in); | |
6b7f3cf9 PT |
1103 | break; |
1104 | ||
1105 | case AF_INET6: | |
1106 | ((struct sockaddr_in6 *)&da->da_addr)->sin6_port = port; | |
1107 | da->da_addrlen = sizeof(struct sockaddr_in6); | |
6b7f3cf9 PT |
1108 | startsep = "["; |
1109 | endsep = "]"; | |
1110 | break; | |
1111 | ||
1112 | default: | |
1113 | dprintk("%s: unsupported address family: %u\n", | |
1114 | __func__, da->da_addr.ss_family); | |
1115 | goto out_free_da; | |
1116 | } | |
1117 | ||
4be78d26 TM |
1118 | da->da_transport = xprt_find_transport_ident(netid); |
1119 | if (da->da_transport < 0) { | |
1120 | dprintk("%s: ERROR: unknown r_netid \"%s\"\n", | |
1121 | __func__, netid); | |
6b7f3cf9 PT |
1122 | goto out_free_da; |
1123 | } | |
1124 | ||
4be78d26 TM |
1125 | da->da_netid = netid; |
1126 | ||
6b7f3cf9 PT |
1127 | /* save human readable address */ |
1128 | len = strlen(startsep) + strlen(buf) + strlen(endsep) + 7; | |
1129 | da->da_remotestr = kzalloc(len, gfp_flags); | |
1130 | ||
1131 | /* NULL is ok, only used for dprintk */ | |
1132 | if (da->da_remotestr) | |
1133 | snprintf(da->da_remotestr, len, "%s%s%s:%u", startsep, | |
1134 | buf, endsep, ntohs(port)); | |
1135 | ||
1136 | dprintk("%s: Parsed DS addr %s\n", __func__, da->da_remotestr); | |
1137 | kfree(buf); | |
6b7f3cf9 PT |
1138 | return da; |
1139 | ||
1140 | out_free_da: | |
1141 | kfree(da); | |
1142 | out_free_buf: | |
1143 | dprintk("%s: Error parsing DS addr: %s\n", __func__, buf); | |
1144 | kfree(buf); | |
1145 | out_free_netid: | |
1146 | kfree(netid); | |
1147 | out_err: | |
1148 | return NULL; | |
1149 | } | |
1150 | EXPORT_SYMBOL_GPL(nfs4_decode_mp_ds_addr); | |
338d00cf TH |
1151 | |
1152 | void | |
1153 | pnfs_layout_mark_request_commit(struct nfs_page *req, | |
1154 | struct pnfs_layout_segment *lseg, | |
1155 | struct nfs_commit_info *cinfo, | |
1156 | u32 ds_commit_idx) | |
1157 | { | |
1158 | struct list_head *list; | |
ba827c9a | 1159 | struct pnfs_commit_array *array; |
e18c18eb | 1160 | struct pnfs_commit_bucket *bucket; |
338d00cf | 1161 | |
e824f99a | 1162 | mutex_lock(&NFS_I(cinfo->inode)->commit_mutex); |
ba827c9a | 1163 | array = pnfs_lookup_commit_array(cinfo->ds, lseg); |
e18c18eb | 1164 | if (!array || !pnfs_is_valid_lseg(lseg)) |
ba827c9a | 1165 | goto out_resched; |
e18c18eb TM |
1166 | bucket = &array->buckets[ds_commit_idx]; |
1167 | list = &bucket->written; | |
1168 | /* Non-empty buckets hold a reference on the lseg. That ref | |
1169 | * is normally transferred to the COMMIT call and released | |
1170 | * there. It could also be released if the last req is pulled | |
1171 | * off due to a rewrite, in which case it will be done in | |
1172 | * pnfs_common_clear_request_commit | |
1173 | */ | |
1174 | if (!bucket->lseg) | |
1175 | bucket->lseg = pnfs_get_lseg(lseg); | |
338d00cf TH |
1176 | set_bit(PG_COMMIT_TO_DS, &req->wb_flags); |
1177 | cinfo->ds->nwritten++; | |
338d00cf | 1178 | |
86d80f97 | 1179 | nfs_request_add_commit_list_locked(req, list, cinfo); |
e824f99a | 1180 | mutex_unlock(&NFS_I(cinfo->inode)->commit_mutex); |
86d80f97 | 1181 | nfs_mark_page_unstable(req->wb_page, cinfo); |
ba827c9a TM |
1182 | return; |
1183 | out_resched: | |
1184 | mutex_unlock(&NFS_I(cinfo->inode)->commit_mutex); | |
1185 | cinfo->completion_ops->resched_write(cinfo, req); | |
338d00cf TH |
1186 | } |
1187 | EXPORT_SYMBOL_GPL(pnfs_layout_mark_request_commit); | |
5bb89b47 TM |
1188 | |
1189 | int | |
1190 | pnfs_nfs_generic_sync(struct inode *inode, bool datasync) | |
1191 | { | |
2e18d4d8 TM |
1192 | int ret; |
1193 | ||
1194 | if (!pnfs_layoutcommit_outstanding(inode)) | |
1195 | return 0; | |
1196 | ret = nfs_commit_inode(inode, FLUSH_SYNC); | |
1197 | if (ret < 0) | |
1198 | return ret; | |
5bb89b47 TM |
1199 | if (datasync) |
1200 | return 0; | |
1201 | return pnfs_layoutcommit_inode(inode, true); | |
1202 | } | |
1203 | EXPORT_SYMBOL_GPL(pnfs_nfs_generic_sync); | |
1204 |