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Commit | Line | Data |
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d67ae825 TH |
1 | /* |
2 | * Module for pnfs flexfile layout driver. | |
3 | * | |
4 | * Copyright (c) 2014, Primary Data, Inc. All rights reserved. | |
5 | * | |
6 | * Tao Peng <bergwolf@primarydata.com> | |
7 | */ | |
8 | ||
9 | #include <linux/nfs_fs.h> | |
10 | #include <linux/nfs_page.h> | |
11 | #include <linux/module.h> | |
12 | ||
13 | #include <linux/sunrpc/metrics.h> | |
d67ae825 TH |
14 | |
15 | #include "flexfilelayout.h" | |
16 | #include "../nfs4session.h" | |
40c64c26 | 17 | #include "../nfs4idmap.h" |
d67ae825 TH |
18 | #include "../internal.h" |
19 | #include "../delegation.h" | |
20 | #include "../nfs4trace.h" | |
21 | #include "../iostat.h" | |
22 | #include "../nfs.h" | |
ad4dc53e | 23 | #include "../nfs42.h" |
d67ae825 TH |
24 | |
25 | #define NFSDBG_FACILITY NFSDBG_PNFS_LD | |
26 | ||
27 | #define FF_LAYOUT_POLL_RETRY_MAX (15*HZ) | |
28 | ||
29 | static struct pnfs_layout_hdr * | |
30 | ff_layout_alloc_layout_hdr(struct inode *inode, gfp_t gfp_flags) | |
31 | { | |
32 | struct nfs4_flexfile_layout *ffl; | |
33 | ||
34 | ffl = kzalloc(sizeof(*ffl), gfp_flags); | |
35 | if (ffl) { | |
36 | INIT_LIST_HEAD(&ffl->error_list); | |
266d12d4 | 37 | INIT_LIST_HEAD(&ffl->mirrors); |
d67ae825 TH |
38 | return &ffl->generic_hdr; |
39 | } else | |
40 | return NULL; | |
41 | } | |
42 | ||
43 | static void | |
44 | ff_layout_free_layout_hdr(struct pnfs_layout_hdr *lo) | |
45 | { | |
46 | struct nfs4_ff_layout_ds_err *err, *n; | |
47 | ||
48 | list_for_each_entry_safe(err, n, &FF_LAYOUT_FROM_HDR(lo)->error_list, | |
49 | list) { | |
50 | list_del(&err->list); | |
51 | kfree(err); | |
52 | } | |
53 | kfree(FF_LAYOUT_FROM_HDR(lo)); | |
54 | } | |
55 | ||
56 | static int decode_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid) | |
57 | { | |
58 | __be32 *p; | |
59 | ||
60 | p = xdr_inline_decode(xdr, NFS4_STATEID_SIZE); | |
61 | if (unlikely(p == NULL)) | |
62 | return -ENOBUFS; | |
63 | memcpy(stateid, p, NFS4_STATEID_SIZE); | |
64 | dprintk("%s: stateid id= [%x%x%x%x]\n", __func__, | |
65 | p[0], p[1], p[2], p[3]); | |
66 | return 0; | |
67 | } | |
68 | ||
69 | static int decode_deviceid(struct xdr_stream *xdr, struct nfs4_deviceid *devid) | |
70 | { | |
71 | __be32 *p; | |
72 | ||
73 | p = xdr_inline_decode(xdr, NFS4_DEVICEID4_SIZE); | |
74 | if (unlikely(!p)) | |
75 | return -ENOBUFS; | |
76 | memcpy(devid, p, NFS4_DEVICEID4_SIZE); | |
77 | nfs4_print_deviceid(devid); | |
78 | return 0; | |
79 | } | |
80 | ||
81 | static int decode_nfs_fh(struct xdr_stream *xdr, struct nfs_fh *fh) | |
82 | { | |
83 | __be32 *p; | |
84 | ||
85 | p = xdr_inline_decode(xdr, 4); | |
86 | if (unlikely(!p)) | |
87 | return -ENOBUFS; | |
88 | fh->size = be32_to_cpup(p++); | |
89 | if (fh->size > sizeof(struct nfs_fh)) { | |
90 | printk(KERN_ERR "NFS flexfiles: Too big fh received %d\n", | |
91 | fh->size); | |
92 | return -EOVERFLOW; | |
93 | } | |
94 | /* fh.data */ | |
95 | p = xdr_inline_decode(xdr, fh->size); | |
96 | if (unlikely(!p)) | |
97 | return -ENOBUFS; | |
98 | memcpy(&fh->data, p, fh->size); | |
99 | dprintk("%s: fh len %d\n", __func__, fh->size); | |
100 | ||
101 | return 0; | |
102 | } | |
103 | ||
104 | /* | |
105 | * Currently only stringified uids and gids are accepted. | |
106 | * I.e., kerberos is not supported to the DSes, so no pricipals. | |
107 | * | |
108 | * That means that one common function will suffice, but when | |
109 | * principals are added, this should be split to accomodate | |
110 | * calls to both nfs_map_name_to_uid() and nfs_map_group_to_gid(). | |
111 | */ | |
112 | static int | |
113 | decode_name(struct xdr_stream *xdr, u32 *id) | |
114 | { | |
115 | __be32 *p; | |
116 | int len; | |
117 | ||
118 | /* opaque_length(4)*/ | |
119 | p = xdr_inline_decode(xdr, 4); | |
120 | if (unlikely(!p)) | |
121 | return -ENOBUFS; | |
122 | len = be32_to_cpup(p++); | |
123 | if (len < 0) | |
124 | return -EINVAL; | |
125 | ||
126 | dprintk("%s: len %u\n", __func__, len); | |
127 | ||
128 | /* opaque body */ | |
129 | p = xdr_inline_decode(xdr, len); | |
130 | if (unlikely(!p)) | |
131 | return -ENOBUFS; | |
132 | ||
133 | if (!nfs_map_string_to_numeric((char *)p, len, id)) | |
134 | return -EINVAL; | |
135 | ||
136 | return 0; | |
137 | } | |
138 | ||
266d12d4 TM |
139 | static bool ff_mirror_match_fh(const struct nfs4_ff_layout_mirror *m1, |
140 | const struct nfs4_ff_layout_mirror *m2) | |
141 | { | |
142 | int i, j; | |
143 | ||
144 | if (m1->fh_versions_cnt != m2->fh_versions_cnt) | |
145 | return false; | |
146 | for (i = 0; i < m1->fh_versions_cnt; i++) { | |
147 | bool found_fh = false; | |
148 | for (j = 0; j < m2->fh_versions_cnt; i++) { | |
149 | if (nfs_compare_fh(&m1->fh_versions[i], | |
150 | &m2->fh_versions[j]) == 0) { | |
151 | found_fh = true; | |
152 | break; | |
153 | } | |
154 | } | |
155 | if (!found_fh) | |
156 | return false; | |
157 | } | |
158 | return true; | |
159 | } | |
160 | ||
161 | static struct nfs4_ff_layout_mirror * | |
162 | ff_layout_add_mirror(struct pnfs_layout_hdr *lo, | |
163 | struct nfs4_ff_layout_mirror *mirror) | |
164 | { | |
165 | struct nfs4_flexfile_layout *ff_layout = FF_LAYOUT_FROM_HDR(lo); | |
166 | struct nfs4_ff_layout_mirror *pos; | |
167 | struct inode *inode = lo->plh_inode; | |
168 | ||
169 | spin_lock(&inode->i_lock); | |
170 | list_for_each_entry(pos, &ff_layout->mirrors, mirrors) { | |
171 | if (mirror->mirror_ds != pos->mirror_ds) | |
172 | continue; | |
173 | if (!ff_mirror_match_fh(mirror, pos)) | |
174 | continue; | |
175 | if (atomic_inc_not_zero(&pos->ref)) { | |
176 | spin_unlock(&inode->i_lock); | |
177 | return pos; | |
178 | } | |
179 | } | |
180 | list_add(&mirror->mirrors, &ff_layout->mirrors); | |
181 | mirror->layout = lo; | |
182 | spin_unlock(&inode->i_lock); | |
183 | return mirror; | |
184 | } | |
185 | ||
186 | void | |
187 | ff_layout_remove_mirror(struct nfs4_ff_layout_mirror *mirror) | |
188 | { | |
189 | struct inode *inode; | |
190 | if (mirror->layout == NULL) | |
191 | return; | |
192 | inode = mirror->layout->plh_inode; | |
193 | spin_lock(&inode->i_lock); | |
194 | list_del(&mirror->mirrors); | |
195 | spin_unlock(&inode->i_lock); | |
196 | mirror->layout = NULL; | |
197 | } | |
198 | ||
28a0d72c TM |
199 | static struct nfs4_ff_layout_mirror *ff_layout_alloc_mirror(gfp_t gfp_flags) |
200 | { | |
201 | struct nfs4_ff_layout_mirror *mirror; | |
202 | ||
203 | mirror = kzalloc(sizeof(*mirror), gfp_flags); | |
204 | if (mirror != NULL) { | |
205 | spin_lock_init(&mirror->lock); | |
206 | atomic_set(&mirror->ref, 1); | |
266d12d4 | 207 | INIT_LIST_HEAD(&mirror->mirrors); |
28a0d72c TM |
208 | } |
209 | return mirror; | |
210 | } | |
211 | ||
212 | static void ff_layout_free_mirror(struct nfs4_ff_layout_mirror *mirror) | |
213 | { | |
266d12d4 | 214 | ff_layout_remove_mirror(mirror); |
28a0d72c TM |
215 | kfree(mirror->fh_versions); |
216 | nfs4_ff_layout_put_deviceid(mirror->mirror_ds); | |
217 | kfree(mirror); | |
218 | } | |
219 | ||
220 | static void ff_layout_put_mirror(struct nfs4_ff_layout_mirror *mirror) | |
221 | { | |
222 | if (mirror != NULL && atomic_dec_and_test(&mirror->ref)) | |
223 | ff_layout_free_mirror(mirror); | |
224 | } | |
225 | ||
d67ae825 TH |
226 | static void ff_layout_free_mirror_array(struct nfs4_ff_layout_segment *fls) |
227 | { | |
228 | int i; | |
229 | ||
230 | if (fls->mirror_array) { | |
231 | for (i = 0; i < fls->mirror_array_cnt; i++) { | |
232 | /* normally mirror_ds is freed in | |
233 | * .free_deviceid_node but we still do it here | |
234 | * for .alloc_lseg error path */ | |
28a0d72c | 235 | ff_layout_put_mirror(fls->mirror_array[i]); |
d67ae825 TH |
236 | } |
237 | kfree(fls->mirror_array); | |
238 | fls->mirror_array = NULL; | |
239 | } | |
240 | } | |
241 | ||
242 | static int ff_layout_check_layout(struct nfs4_layoutget_res *lgr) | |
243 | { | |
244 | int ret = 0; | |
245 | ||
246 | dprintk("--> %s\n", __func__); | |
247 | ||
248 | /* FIXME: remove this check when layout segment support is added */ | |
249 | if (lgr->range.offset != 0 || | |
250 | lgr->range.length != NFS4_MAX_UINT64) { | |
251 | dprintk("%s Only whole file layouts supported. Use MDS i/o\n", | |
252 | __func__); | |
253 | ret = -EINVAL; | |
254 | } | |
255 | ||
256 | dprintk("--> %s returns %d\n", __func__, ret); | |
257 | return ret; | |
258 | } | |
259 | ||
260 | static void _ff_layout_free_lseg(struct nfs4_ff_layout_segment *fls) | |
261 | { | |
262 | if (fls) { | |
263 | ff_layout_free_mirror_array(fls); | |
264 | kfree(fls); | |
265 | } | |
266 | } | |
267 | ||
268 | static void ff_layout_sort_mirrors(struct nfs4_ff_layout_segment *fls) | |
269 | { | |
d67ae825 TH |
270 | int i, j; |
271 | ||
272 | for (i = 0; i < fls->mirror_array_cnt - 1; i++) { | |
273 | for (j = i + 1; j < fls->mirror_array_cnt; j++) | |
274 | if (fls->mirror_array[i]->efficiency < | |
455b6ee6 FF |
275 | fls->mirror_array[j]->efficiency) |
276 | swap(fls->mirror_array[i], | |
277 | fls->mirror_array[j]); | |
d67ae825 TH |
278 | } |
279 | } | |
280 | ||
281 | static struct pnfs_layout_segment * | |
282 | ff_layout_alloc_lseg(struct pnfs_layout_hdr *lh, | |
283 | struct nfs4_layoutget_res *lgr, | |
284 | gfp_t gfp_flags) | |
285 | { | |
286 | struct pnfs_layout_segment *ret; | |
287 | struct nfs4_ff_layout_segment *fls = NULL; | |
288 | struct xdr_stream stream; | |
289 | struct xdr_buf buf; | |
290 | struct page *scratch; | |
291 | u64 stripe_unit; | |
292 | u32 mirror_array_cnt; | |
293 | __be32 *p; | |
294 | int i, rc; | |
295 | ||
296 | dprintk("--> %s\n", __func__); | |
297 | scratch = alloc_page(gfp_flags); | |
298 | if (!scratch) | |
299 | return ERR_PTR(-ENOMEM); | |
300 | ||
301 | xdr_init_decode_pages(&stream, &buf, lgr->layoutp->pages, | |
302 | lgr->layoutp->len); | |
303 | xdr_set_scratch_buffer(&stream, page_address(scratch), PAGE_SIZE); | |
304 | ||
305 | /* stripe unit and mirror_array_cnt */ | |
306 | rc = -EIO; | |
307 | p = xdr_inline_decode(&stream, 8 + 4); | |
308 | if (!p) | |
309 | goto out_err_free; | |
310 | ||
311 | p = xdr_decode_hyper(p, &stripe_unit); | |
312 | mirror_array_cnt = be32_to_cpup(p++); | |
313 | dprintk("%s: stripe_unit=%llu mirror_array_cnt=%u\n", __func__, | |
314 | stripe_unit, mirror_array_cnt); | |
315 | ||
316 | if (mirror_array_cnt > NFS4_FLEXFILE_LAYOUT_MAX_MIRROR_CNT || | |
317 | mirror_array_cnt == 0) | |
318 | goto out_err_free; | |
319 | ||
320 | rc = -ENOMEM; | |
321 | fls = kzalloc(sizeof(*fls), gfp_flags); | |
322 | if (!fls) | |
323 | goto out_err_free; | |
324 | ||
325 | fls->mirror_array_cnt = mirror_array_cnt; | |
326 | fls->stripe_unit = stripe_unit; | |
327 | fls->mirror_array = kcalloc(fls->mirror_array_cnt, | |
328 | sizeof(fls->mirror_array[0]), gfp_flags); | |
329 | if (fls->mirror_array == NULL) | |
330 | goto out_err_free; | |
331 | ||
332 | for (i = 0; i < fls->mirror_array_cnt; i++) { | |
266d12d4 | 333 | struct nfs4_ff_layout_mirror *mirror; |
d67ae825 TH |
334 | struct nfs4_deviceid devid; |
335 | struct nfs4_deviceid_node *idnode; | |
336 | u32 ds_count; | |
337 | u32 fh_count; | |
338 | int j; | |
339 | ||
340 | rc = -EIO; | |
341 | p = xdr_inline_decode(&stream, 4); | |
342 | if (!p) | |
343 | goto out_err_free; | |
344 | ds_count = be32_to_cpup(p); | |
345 | ||
346 | /* FIXME: allow for striping? */ | |
347 | if (ds_count != 1) | |
348 | goto out_err_free; | |
349 | ||
28a0d72c | 350 | fls->mirror_array[i] = ff_layout_alloc_mirror(gfp_flags); |
d67ae825 TH |
351 | if (fls->mirror_array[i] == NULL) { |
352 | rc = -ENOMEM; | |
353 | goto out_err_free; | |
354 | } | |
355 | ||
d67ae825 TH |
356 | fls->mirror_array[i]->ds_count = ds_count; |
357 | ||
358 | /* deviceid */ | |
359 | rc = decode_deviceid(&stream, &devid); | |
360 | if (rc) | |
361 | goto out_err_free; | |
362 | ||
363 | idnode = nfs4_find_get_deviceid(NFS_SERVER(lh->plh_inode), | |
364 | &devid, lh->plh_lc_cred, | |
365 | gfp_flags); | |
366 | /* | |
367 | * upon success, mirror_ds is allocated by previous | |
368 | * getdeviceinfo, or newly by .alloc_deviceid_node | |
369 | * nfs4_find_get_deviceid failure is indeed getdeviceinfo falure | |
370 | */ | |
371 | if (idnode) | |
372 | fls->mirror_array[i]->mirror_ds = | |
373 | FF_LAYOUT_MIRROR_DS(idnode); | |
374 | else | |
375 | goto out_err_free; | |
376 | ||
377 | /* efficiency */ | |
378 | rc = -EIO; | |
379 | p = xdr_inline_decode(&stream, 4); | |
380 | if (!p) | |
381 | goto out_err_free; | |
382 | fls->mirror_array[i]->efficiency = be32_to_cpup(p); | |
383 | ||
384 | /* stateid */ | |
385 | rc = decode_stateid(&stream, &fls->mirror_array[i]->stateid); | |
386 | if (rc) | |
387 | goto out_err_free; | |
388 | ||
389 | /* fh */ | |
390 | p = xdr_inline_decode(&stream, 4); | |
391 | if (!p) | |
392 | goto out_err_free; | |
393 | fh_count = be32_to_cpup(p); | |
394 | ||
395 | fls->mirror_array[i]->fh_versions = | |
396 | kzalloc(fh_count * sizeof(struct nfs_fh), | |
397 | gfp_flags); | |
398 | if (fls->mirror_array[i]->fh_versions == NULL) { | |
399 | rc = -ENOMEM; | |
400 | goto out_err_free; | |
401 | } | |
402 | ||
403 | for (j = 0; j < fh_count; j++) { | |
404 | rc = decode_nfs_fh(&stream, | |
405 | &fls->mirror_array[i]->fh_versions[j]); | |
406 | if (rc) | |
407 | goto out_err_free; | |
408 | } | |
409 | ||
410 | fls->mirror_array[i]->fh_versions_cnt = fh_count; | |
411 | ||
412 | /* user */ | |
413 | rc = decode_name(&stream, &fls->mirror_array[i]->uid); | |
414 | if (rc) | |
415 | goto out_err_free; | |
416 | ||
417 | /* group */ | |
418 | rc = decode_name(&stream, &fls->mirror_array[i]->gid); | |
419 | if (rc) | |
420 | goto out_err_free; | |
421 | ||
266d12d4 TM |
422 | mirror = ff_layout_add_mirror(lh, fls->mirror_array[i]); |
423 | if (mirror != fls->mirror_array[i]) { | |
424 | ff_layout_free_mirror(fls->mirror_array[i]); | |
425 | fls->mirror_array[i] = mirror; | |
426 | } | |
427 | ||
d67ae825 TH |
428 | dprintk("%s: uid %d gid %d\n", __func__, |
429 | fls->mirror_array[i]->uid, | |
430 | fls->mirror_array[i]->gid); | |
431 | } | |
432 | ||
c0f5f505 TM |
433 | p = xdr_inline_decode(&stream, 4); |
434 | if (p) | |
435 | fls->flags = be32_to_cpup(p); | |
436 | ||
d67ae825 TH |
437 | ff_layout_sort_mirrors(fls); |
438 | rc = ff_layout_check_layout(lgr); | |
439 | if (rc) | |
440 | goto out_err_free; | |
441 | ||
442 | ret = &fls->generic_hdr; | |
443 | dprintk("<-- %s (success)\n", __func__); | |
444 | out_free_page: | |
445 | __free_page(scratch); | |
446 | return ret; | |
447 | out_err_free: | |
448 | _ff_layout_free_lseg(fls); | |
449 | ret = ERR_PTR(rc); | |
450 | dprintk("<-- %s (%d)\n", __func__, rc); | |
451 | goto out_free_page; | |
452 | } | |
453 | ||
454 | static bool ff_layout_has_rw_segments(struct pnfs_layout_hdr *layout) | |
455 | { | |
456 | struct pnfs_layout_segment *lseg; | |
457 | ||
458 | list_for_each_entry(lseg, &layout->plh_segs, pls_list) | |
459 | if (lseg->pls_range.iomode == IOMODE_RW) | |
460 | return true; | |
461 | ||
462 | return false; | |
463 | } | |
464 | ||
465 | static void | |
466 | ff_layout_free_lseg(struct pnfs_layout_segment *lseg) | |
467 | { | |
468 | struct nfs4_ff_layout_segment *fls = FF_LAYOUT_LSEG(lseg); | |
469 | int i; | |
470 | ||
471 | dprintk("--> %s\n", __func__); | |
472 | ||
473 | for (i = 0; i < fls->mirror_array_cnt; i++) { | |
474 | if (fls->mirror_array[i]) { | |
475 | nfs4_ff_layout_put_deviceid(fls->mirror_array[i]->mirror_ds); | |
476 | fls->mirror_array[i]->mirror_ds = NULL; | |
477 | if (fls->mirror_array[i]->cred) { | |
478 | put_rpccred(fls->mirror_array[i]->cred); | |
479 | fls->mirror_array[i]->cred = NULL; | |
480 | } | |
481 | } | |
482 | } | |
483 | ||
484 | if (lseg->pls_range.iomode == IOMODE_RW) { | |
485 | struct nfs4_flexfile_layout *ffl; | |
486 | struct inode *inode; | |
487 | ||
488 | ffl = FF_LAYOUT_FROM_HDR(lseg->pls_layout); | |
489 | inode = ffl->generic_hdr.plh_inode; | |
490 | spin_lock(&inode->i_lock); | |
491 | if (!ff_layout_has_rw_segments(lseg->pls_layout)) { | |
492 | ffl->commit_info.nbuckets = 0; | |
493 | kfree(ffl->commit_info.buckets); | |
494 | ffl->commit_info.buckets = NULL; | |
495 | } | |
496 | spin_unlock(&inode->i_lock); | |
497 | } | |
498 | _ff_layout_free_lseg(fls); | |
499 | } | |
500 | ||
501 | /* Return 1 until we have multiple lsegs support */ | |
502 | static int | |
503 | ff_layout_get_lseg_count(struct nfs4_ff_layout_segment *fls) | |
504 | { | |
505 | return 1; | |
506 | } | |
507 | ||
abcb7bfc | 508 | static void |
e76d28dd | 509 | nfs4_ff_start_busy_timer(struct nfs4_ff_busy_timer *timer, ktime_t now) |
abcb7bfc | 510 | { |
9bbd9bb4 PT |
511 | /* first IO request? */ |
512 | if (atomic_inc_return(&timer->n_ops) == 1) { | |
e76d28dd | 513 | timer->start_time = now; |
abcb7bfc TM |
514 | } |
515 | } | |
516 | ||
517 | static ktime_t | |
e76d28dd | 518 | nfs4_ff_end_busy_timer(struct nfs4_ff_busy_timer *timer, ktime_t now) |
abcb7bfc | 519 | { |
e76d28dd | 520 | ktime_t start; |
abcb7bfc | 521 | |
9bbd9bb4 PT |
522 | if (atomic_dec_return(&timer->n_ops) < 0) |
523 | WARN_ON_ONCE(1); | |
524 | ||
9bbd9bb4 PT |
525 | start = timer->start_time; |
526 | timer->start_time = now; | |
abcb7bfc TM |
527 | return ktime_sub(now, start); |
528 | } | |
529 | ||
97ba375b | 530 | static bool |
d983803d | 531 | nfs4_ff_layoutstat_start_io(struct nfs4_ff_layout_mirror *mirror, |
e76d28dd TM |
532 | struct nfs4_ff_layoutstat *layoutstat, |
533 | ktime_t now) | |
abcb7bfc | 534 | { |
d983803d | 535 | static const ktime_t notime = {0}; |
bbf58bf3 | 536 | s64 report_interval = FF_LAYOUTSTATS_REPORT_INTERVAL; |
d983803d | 537 | |
e76d28dd | 538 | nfs4_ff_start_busy_timer(&layoutstat->busy_timer, now); |
9bbd9bb4 PT |
539 | if (ktime_equal(mirror->start_time, notime)) |
540 | mirror->start_time = now; | |
541 | if (ktime_equal(mirror->last_report_time, notime)) | |
542 | mirror->last_report_time = now; | |
bbf58bf3 TM |
543 | if (layoutstats_timer != 0) |
544 | report_interval = (s64)layoutstats_timer * 1000LL; | |
97ba375b | 545 | if (ktime_to_ms(ktime_sub(now, mirror->last_report_time)) >= |
bbf58bf3 | 546 | report_interval) { |
97ba375b PT |
547 | mirror->last_report_time = now; |
548 | return true; | |
549 | } | |
550 | ||
551 | return false; | |
abcb7bfc TM |
552 | } |
553 | ||
554 | static void | |
555 | nfs4_ff_layout_stat_io_update_requested(struct nfs4_ff_layoutstat *layoutstat, | |
556 | __u64 requested) | |
557 | { | |
558 | struct nfs4_ff_io_stat *iostat = &layoutstat->io_stat; | |
559 | ||
560 | iostat->ops_requested++; | |
561 | iostat->bytes_requested += requested; | |
562 | } | |
563 | ||
564 | static void | |
565 | nfs4_ff_layout_stat_io_update_completed(struct nfs4_ff_layoutstat *layoutstat, | |
566 | __u64 requested, | |
567 | __u64 completed, | |
e76d28dd TM |
568 | ktime_t time_completed, |
569 | ktime_t time_started) | |
abcb7bfc TM |
570 | { |
571 | struct nfs4_ff_io_stat *iostat = &layoutstat->io_stat; | |
e76d28dd | 572 | ktime_t completion_time = ktime_sub(time_completed, time_started); |
abcb7bfc TM |
573 | ktime_t timer; |
574 | ||
575 | iostat->ops_completed++; | |
576 | iostat->bytes_completed += completed; | |
577 | iostat->bytes_not_delivered += requested - completed; | |
578 | ||
e76d28dd | 579 | timer = nfs4_ff_end_busy_timer(&layoutstat->busy_timer, time_completed); |
abcb7bfc TM |
580 | iostat->total_busy_time = |
581 | ktime_add(iostat->total_busy_time, timer); | |
582 | iostat->aggregate_completion_time = | |
e76d28dd TM |
583 | ktime_add(iostat->aggregate_completion_time, |
584 | completion_time); | |
abcb7bfc TM |
585 | } |
586 | ||
587 | static void | |
0b7baf94 TM |
588 | nfs4_ff_layout_stat_io_start_read(struct inode *inode, |
589 | struct nfs4_ff_layout_mirror *mirror, | |
e76d28dd | 590 | __u64 requested, ktime_t now) |
abcb7bfc | 591 | { |
97ba375b PT |
592 | bool report; |
593 | ||
abcb7bfc | 594 | spin_lock(&mirror->lock); |
e76d28dd | 595 | report = nfs4_ff_layoutstat_start_io(mirror, &mirror->read_stat, now); |
abcb7bfc TM |
596 | nfs4_ff_layout_stat_io_update_requested(&mirror->read_stat, requested); |
597 | spin_unlock(&mirror->lock); | |
97ba375b PT |
598 | |
599 | if (report) | |
0b7baf94 | 600 | pnfs_report_layoutstat(inode, GFP_KERNEL); |
abcb7bfc TM |
601 | } |
602 | ||
603 | static void | |
604 | nfs4_ff_layout_stat_io_end_read(struct rpc_task *task, | |
605 | struct nfs4_ff_layout_mirror *mirror, | |
606 | __u64 requested, | |
607 | __u64 completed) | |
608 | { | |
609 | spin_lock(&mirror->lock); | |
610 | nfs4_ff_layout_stat_io_update_completed(&mirror->read_stat, | |
611 | requested, completed, | |
e76d28dd | 612 | ktime_get(), task->tk_start); |
abcb7bfc TM |
613 | spin_unlock(&mirror->lock); |
614 | } | |
615 | ||
616 | static void | |
0b7baf94 TM |
617 | nfs4_ff_layout_stat_io_start_write(struct inode *inode, |
618 | struct nfs4_ff_layout_mirror *mirror, | |
e76d28dd | 619 | __u64 requested, ktime_t now) |
abcb7bfc | 620 | { |
97ba375b PT |
621 | bool report; |
622 | ||
abcb7bfc | 623 | spin_lock(&mirror->lock); |
e76d28dd | 624 | report = nfs4_ff_layoutstat_start_io(mirror , &mirror->write_stat, now); |
abcb7bfc TM |
625 | nfs4_ff_layout_stat_io_update_requested(&mirror->write_stat, requested); |
626 | spin_unlock(&mirror->lock); | |
97ba375b PT |
627 | |
628 | if (report) | |
0b7baf94 | 629 | pnfs_report_layoutstat(inode, GFP_NOIO); |
abcb7bfc TM |
630 | } |
631 | ||
632 | static void | |
633 | nfs4_ff_layout_stat_io_end_write(struct rpc_task *task, | |
634 | struct nfs4_ff_layout_mirror *mirror, | |
635 | __u64 requested, | |
636 | __u64 completed, | |
637 | enum nfs3_stable_how committed) | |
638 | { | |
639 | if (committed == NFS_UNSTABLE) | |
640 | requested = completed = 0; | |
641 | ||
642 | spin_lock(&mirror->lock); | |
643 | nfs4_ff_layout_stat_io_update_completed(&mirror->write_stat, | |
e76d28dd | 644 | requested, completed, ktime_get(), task->tk_start); |
abcb7bfc TM |
645 | spin_unlock(&mirror->lock); |
646 | } | |
647 | ||
d67ae825 TH |
648 | static int |
649 | ff_layout_alloc_commit_info(struct pnfs_layout_segment *lseg, | |
650 | struct nfs_commit_info *cinfo, | |
651 | gfp_t gfp_flags) | |
652 | { | |
653 | struct nfs4_ff_layout_segment *fls = FF_LAYOUT_LSEG(lseg); | |
654 | struct pnfs_commit_bucket *buckets; | |
655 | int size; | |
656 | ||
657 | if (cinfo->ds->nbuckets != 0) { | |
658 | /* This assumes there is only one RW lseg per file. | |
659 | * To support multiple lseg per file, we need to | |
660 | * change struct pnfs_commit_bucket to allow dynamic | |
661 | * increasing nbuckets. | |
662 | */ | |
663 | return 0; | |
664 | } | |
665 | ||
666 | size = ff_layout_get_lseg_count(fls) * FF_LAYOUT_MIRROR_COUNT(lseg); | |
667 | ||
668 | buckets = kcalloc(size, sizeof(struct pnfs_commit_bucket), | |
669 | gfp_flags); | |
670 | if (!buckets) | |
671 | return -ENOMEM; | |
672 | else { | |
673 | int i; | |
674 | ||
675 | spin_lock(cinfo->lock); | |
676 | if (cinfo->ds->nbuckets != 0) | |
677 | kfree(buckets); | |
678 | else { | |
679 | cinfo->ds->buckets = buckets; | |
680 | cinfo->ds->nbuckets = size; | |
681 | for (i = 0; i < size; i++) { | |
682 | INIT_LIST_HEAD(&buckets[i].written); | |
683 | INIT_LIST_HEAD(&buckets[i].committing); | |
684 | /* mark direct verifier as unset */ | |
685 | buckets[i].direct_verf.committed = | |
686 | NFS_INVALID_STABLE_HOW; | |
687 | } | |
688 | } | |
689 | spin_unlock(cinfo->lock); | |
690 | return 0; | |
691 | } | |
692 | } | |
693 | ||
694 | static struct nfs4_pnfs_ds * | |
695 | ff_layout_choose_best_ds_for_read(struct nfs_pageio_descriptor *pgio, | |
696 | int *best_idx) | |
697 | { | |
698 | struct nfs4_ff_layout_segment *fls; | |
699 | struct nfs4_pnfs_ds *ds; | |
700 | int idx; | |
701 | ||
702 | fls = FF_LAYOUT_LSEG(pgio->pg_lseg); | |
703 | /* mirrors are sorted by efficiency */ | |
704 | for (idx = 0; idx < fls->mirror_array_cnt; idx++) { | |
705 | ds = nfs4_ff_layout_prepare_ds(pgio->pg_lseg, idx, false); | |
706 | if (ds) { | |
707 | *best_idx = idx; | |
708 | return ds; | |
709 | } | |
710 | } | |
711 | ||
712 | return NULL; | |
713 | } | |
714 | ||
715 | static void | |
716 | ff_layout_pg_init_read(struct nfs_pageio_descriptor *pgio, | |
717 | struct nfs_page *req) | |
718 | { | |
719 | struct nfs_pgio_mirror *pgm; | |
720 | struct nfs4_ff_layout_mirror *mirror; | |
721 | struct nfs4_pnfs_ds *ds; | |
722 | int ds_idx; | |
723 | ||
724 | /* Use full layout for now */ | |
725 | if (!pgio->pg_lseg) | |
726 | pgio->pg_lseg = pnfs_update_layout(pgio->pg_inode, | |
727 | req->wb_context, | |
728 | 0, | |
729 | NFS4_MAX_UINT64, | |
730 | IOMODE_READ, | |
731 | GFP_KERNEL); | |
732 | /* If no lseg, fall back to read through mds */ | |
733 | if (pgio->pg_lseg == NULL) | |
734 | goto out_mds; | |
735 | ||
736 | ds = ff_layout_choose_best_ds_for_read(pgio, &ds_idx); | |
737 | if (!ds) | |
738 | goto out_mds; | |
739 | mirror = FF_LAYOUT_COMP(pgio->pg_lseg, ds_idx); | |
740 | ||
741 | pgio->pg_mirror_idx = ds_idx; | |
742 | ||
743 | /* read always uses only one mirror - idx 0 for pgio layer */ | |
744 | pgm = &pgio->pg_mirrors[0]; | |
745 | pgm->pg_bsize = mirror->mirror_ds->ds_versions[0].rsize; | |
746 | ||
747 | return; | |
748 | out_mds: | |
749 | pnfs_put_lseg(pgio->pg_lseg); | |
750 | pgio->pg_lseg = NULL; | |
751 | nfs_pageio_reset_read_mds(pgio); | |
752 | } | |
753 | ||
754 | static void | |
755 | ff_layout_pg_init_write(struct nfs_pageio_descriptor *pgio, | |
756 | struct nfs_page *req) | |
757 | { | |
758 | struct nfs4_ff_layout_mirror *mirror; | |
759 | struct nfs_pgio_mirror *pgm; | |
760 | struct nfs_commit_info cinfo; | |
761 | struct nfs4_pnfs_ds *ds; | |
762 | int i; | |
763 | int status; | |
764 | ||
765 | if (!pgio->pg_lseg) | |
766 | pgio->pg_lseg = pnfs_update_layout(pgio->pg_inode, | |
767 | req->wb_context, | |
768 | 0, | |
769 | NFS4_MAX_UINT64, | |
770 | IOMODE_RW, | |
771 | GFP_NOFS); | |
772 | /* If no lseg, fall back to write through mds */ | |
773 | if (pgio->pg_lseg == NULL) | |
774 | goto out_mds; | |
775 | ||
776 | nfs_init_cinfo(&cinfo, pgio->pg_inode, pgio->pg_dreq); | |
777 | status = ff_layout_alloc_commit_info(pgio->pg_lseg, &cinfo, GFP_NOFS); | |
778 | if (status < 0) | |
779 | goto out_mds; | |
780 | ||
781 | /* Use a direct mapping of ds_idx to pgio mirror_idx */ | |
782 | if (WARN_ON_ONCE(pgio->pg_mirror_count != | |
783 | FF_LAYOUT_MIRROR_COUNT(pgio->pg_lseg))) | |
784 | goto out_mds; | |
785 | ||
786 | for (i = 0; i < pgio->pg_mirror_count; i++) { | |
787 | ds = nfs4_ff_layout_prepare_ds(pgio->pg_lseg, i, true); | |
788 | if (!ds) | |
789 | goto out_mds; | |
790 | pgm = &pgio->pg_mirrors[i]; | |
791 | mirror = FF_LAYOUT_COMP(pgio->pg_lseg, i); | |
792 | pgm->pg_bsize = mirror->mirror_ds->ds_versions[0].wsize; | |
793 | } | |
794 | ||
795 | return; | |
796 | ||
797 | out_mds: | |
798 | pnfs_put_lseg(pgio->pg_lseg); | |
799 | pgio->pg_lseg = NULL; | |
800 | nfs_pageio_reset_write_mds(pgio); | |
801 | } | |
802 | ||
803 | static unsigned int | |
804 | ff_layout_pg_get_mirror_count_write(struct nfs_pageio_descriptor *pgio, | |
805 | struct nfs_page *req) | |
806 | { | |
807 | if (!pgio->pg_lseg) | |
808 | pgio->pg_lseg = pnfs_update_layout(pgio->pg_inode, | |
809 | req->wb_context, | |
810 | 0, | |
811 | NFS4_MAX_UINT64, | |
812 | IOMODE_RW, | |
813 | GFP_NOFS); | |
814 | if (pgio->pg_lseg) | |
815 | return FF_LAYOUT_MIRROR_COUNT(pgio->pg_lseg); | |
816 | ||
817 | /* no lseg means that pnfs is not in use, so no mirroring here */ | |
d67ae825 TH |
818 | nfs_pageio_reset_write_mds(pgio); |
819 | return 1; | |
820 | } | |
821 | ||
822 | static const struct nfs_pageio_ops ff_layout_pg_read_ops = { | |
823 | .pg_init = ff_layout_pg_init_read, | |
824 | .pg_test = pnfs_generic_pg_test, | |
825 | .pg_doio = pnfs_generic_pg_readpages, | |
826 | .pg_cleanup = pnfs_generic_pg_cleanup, | |
827 | }; | |
828 | ||
829 | static const struct nfs_pageio_ops ff_layout_pg_write_ops = { | |
830 | .pg_init = ff_layout_pg_init_write, | |
831 | .pg_test = pnfs_generic_pg_test, | |
832 | .pg_doio = pnfs_generic_pg_writepages, | |
833 | .pg_get_mirror_count = ff_layout_pg_get_mirror_count_write, | |
834 | .pg_cleanup = pnfs_generic_pg_cleanup, | |
835 | }; | |
836 | ||
837 | static void ff_layout_reset_write(struct nfs_pgio_header *hdr, bool retry_pnfs) | |
838 | { | |
839 | struct rpc_task *task = &hdr->task; | |
840 | ||
841 | pnfs_layoutcommit_inode(hdr->inode, false); | |
842 | ||
843 | if (retry_pnfs) { | |
844 | dprintk("%s Reset task %5u for i/o through pNFS " | |
845 | "(req %s/%llu, %u bytes @ offset %llu)\n", __func__, | |
846 | hdr->task.tk_pid, | |
847 | hdr->inode->i_sb->s_id, | |
848 | (unsigned long long)NFS_FILEID(hdr->inode), | |
849 | hdr->args.count, | |
850 | (unsigned long long)hdr->args.offset); | |
851 | ||
852 | if (!hdr->dreq) { | |
853 | struct nfs_open_context *ctx; | |
854 | ||
855 | ctx = nfs_list_entry(hdr->pages.next)->wb_context; | |
856 | set_bit(NFS_CONTEXT_RESEND_WRITES, &ctx->flags); | |
857 | hdr->completion_ops->error_cleanup(&hdr->pages); | |
858 | } else { | |
859 | nfs_direct_set_resched_writes(hdr->dreq); | |
860 | /* fake unstable write to let common nfs resend pages */ | |
861 | hdr->verf.committed = NFS_UNSTABLE; | |
d6208769 | 862 | hdr->good_bytes = hdr->args.count; |
d67ae825 TH |
863 | } |
864 | return; | |
865 | } | |
866 | ||
867 | if (!test_and_set_bit(NFS_IOHDR_REDO, &hdr->flags)) { | |
868 | dprintk("%s Reset task %5u for i/o through MDS " | |
869 | "(req %s/%llu, %u bytes @ offset %llu)\n", __func__, | |
870 | hdr->task.tk_pid, | |
871 | hdr->inode->i_sb->s_id, | |
872 | (unsigned long long)NFS_FILEID(hdr->inode), | |
873 | hdr->args.count, | |
874 | (unsigned long long)hdr->args.offset); | |
875 | ||
876 | task->tk_status = pnfs_write_done_resend_to_mds(hdr); | |
877 | } | |
878 | } | |
879 | ||
880 | static void ff_layout_reset_read(struct nfs_pgio_header *hdr) | |
881 | { | |
882 | struct rpc_task *task = &hdr->task; | |
883 | ||
884 | pnfs_layoutcommit_inode(hdr->inode, false); | |
885 | ||
886 | if (!test_and_set_bit(NFS_IOHDR_REDO, &hdr->flags)) { | |
887 | dprintk("%s Reset task %5u for i/o through MDS " | |
888 | "(req %s/%llu, %u bytes @ offset %llu)\n", __func__, | |
889 | hdr->task.tk_pid, | |
890 | hdr->inode->i_sb->s_id, | |
891 | (unsigned long long)NFS_FILEID(hdr->inode), | |
892 | hdr->args.count, | |
893 | (unsigned long long)hdr->args.offset); | |
894 | ||
895 | task->tk_status = pnfs_read_done_resend_to_mds(hdr); | |
896 | } | |
897 | } | |
898 | ||
899 | static int ff_layout_async_handle_error_v4(struct rpc_task *task, | |
900 | struct nfs4_state *state, | |
901 | struct nfs_client *clp, | |
902 | struct pnfs_layout_segment *lseg, | |
903 | int idx) | |
904 | { | |
905 | struct pnfs_layout_hdr *lo = lseg->pls_layout; | |
906 | struct inode *inode = lo->plh_inode; | |
907 | struct nfs_server *mds_server = NFS_SERVER(inode); | |
908 | ||
909 | struct nfs4_deviceid_node *devid = FF_LAYOUT_DEVID_NODE(lseg, idx); | |
910 | struct nfs_client *mds_client = mds_server->nfs_client; | |
911 | struct nfs4_slot_table *tbl = &clp->cl_session->fc_slot_table; | |
912 | ||
913 | if (task->tk_status >= 0) | |
914 | return 0; | |
915 | ||
916 | switch (task->tk_status) { | |
917 | /* MDS state errors */ | |
918 | case -NFS4ERR_DELEG_REVOKED: | |
919 | case -NFS4ERR_ADMIN_REVOKED: | |
920 | case -NFS4ERR_BAD_STATEID: | |
921 | if (state == NULL) | |
922 | break; | |
923 | nfs_remove_bad_delegation(state->inode); | |
924 | case -NFS4ERR_OPENMODE: | |
925 | if (state == NULL) | |
926 | break; | |
927 | if (nfs4_schedule_stateid_recovery(mds_server, state) < 0) | |
928 | goto out_bad_stateid; | |
929 | goto wait_on_recovery; | |
930 | case -NFS4ERR_EXPIRED: | |
931 | if (state != NULL) { | |
932 | if (nfs4_schedule_stateid_recovery(mds_server, state) < 0) | |
933 | goto out_bad_stateid; | |
934 | } | |
935 | nfs4_schedule_lease_recovery(mds_client); | |
936 | goto wait_on_recovery; | |
937 | /* DS session errors */ | |
938 | case -NFS4ERR_BADSESSION: | |
939 | case -NFS4ERR_BADSLOT: | |
940 | case -NFS4ERR_BAD_HIGH_SLOT: | |
941 | case -NFS4ERR_DEADSESSION: | |
942 | case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: | |
943 | case -NFS4ERR_SEQ_FALSE_RETRY: | |
944 | case -NFS4ERR_SEQ_MISORDERED: | |
945 | dprintk("%s ERROR %d, Reset session. Exchangeid " | |
946 | "flags 0x%x\n", __func__, task->tk_status, | |
947 | clp->cl_exchange_flags); | |
948 | nfs4_schedule_session_recovery(clp->cl_session, task->tk_status); | |
949 | break; | |
950 | case -NFS4ERR_DELAY: | |
951 | case -NFS4ERR_GRACE: | |
952 | rpc_delay(task, FF_LAYOUT_POLL_RETRY_MAX); | |
953 | break; | |
954 | case -NFS4ERR_RETRY_UNCACHED_REP: | |
955 | break; | |
956 | /* Invalidate Layout errors */ | |
957 | case -NFS4ERR_PNFS_NO_LAYOUT: | |
958 | case -ESTALE: /* mapped NFS4ERR_STALE */ | |
959 | case -EBADHANDLE: /* mapped NFS4ERR_BADHANDLE */ | |
960 | case -EISDIR: /* mapped NFS4ERR_ISDIR */ | |
961 | case -NFS4ERR_FHEXPIRED: | |
962 | case -NFS4ERR_WRONG_TYPE: | |
963 | dprintk("%s Invalid layout error %d\n", __func__, | |
964 | task->tk_status); | |
965 | /* | |
966 | * Destroy layout so new i/o will get a new layout. | |
967 | * Layout will not be destroyed until all current lseg | |
968 | * references are put. Mark layout as invalid to resend failed | |
969 | * i/o and all i/o waiting on the slot table to the MDS until | |
970 | * layout is destroyed and a new valid layout is obtained. | |
971 | */ | |
972 | pnfs_destroy_layout(NFS_I(inode)); | |
973 | rpc_wake_up(&tbl->slot_tbl_waitq); | |
974 | goto reset; | |
975 | /* RPC connection errors */ | |
976 | case -ECONNREFUSED: | |
977 | case -EHOSTDOWN: | |
978 | case -EHOSTUNREACH: | |
979 | case -ENETUNREACH: | |
980 | case -EIO: | |
981 | case -ETIMEDOUT: | |
982 | case -EPIPE: | |
983 | dprintk("%s DS connection error %d\n", __func__, | |
984 | task->tk_status); | |
985 | nfs4_mark_deviceid_unavailable(devid); | |
986 | rpc_wake_up(&tbl->slot_tbl_waitq); | |
987 | /* fall through */ | |
988 | default: | |
989 | if (ff_layout_has_available_ds(lseg)) | |
990 | return -NFS4ERR_RESET_TO_PNFS; | |
991 | reset: | |
992 | dprintk("%s Retry through MDS. Error %d\n", __func__, | |
993 | task->tk_status); | |
994 | return -NFS4ERR_RESET_TO_MDS; | |
995 | } | |
996 | out: | |
997 | task->tk_status = 0; | |
998 | return -EAGAIN; | |
999 | out_bad_stateid: | |
1000 | task->tk_status = -EIO; | |
1001 | return 0; | |
1002 | wait_on_recovery: | |
1003 | rpc_sleep_on(&mds_client->cl_rpcwaitq, task, NULL); | |
1004 | if (test_bit(NFS4CLNT_MANAGER_RUNNING, &mds_client->cl_state) == 0) | |
1005 | rpc_wake_up_queued_task(&mds_client->cl_rpcwaitq, task); | |
1006 | goto out; | |
1007 | } | |
1008 | ||
1009 | /* Retry all errors through either pNFS or MDS except for -EJUKEBOX */ | |
1010 | static int ff_layout_async_handle_error_v3(struct rpc_task *task, | |
1011 | struct pnfs_layout_segment *lseg, | |
1012 | int idx) | |
1013 | { | |
1014 | struct nfs4_deviceid_node *devid = FF_LAYOUT_DEVID_NODE(lseg, idx); | |
1015 | ||
1016 | if (task->tk_status >= 0) | |
1017 | return 0; | |
1018 | ||
1019 | if (task->tk_status != -EJUKEBOX) { | |
1020 | dprintk("%s DS connection error %d\n", __func__, | |
1021 | task->tk_status); | |
1022 | nfs4_mark_deviceid_unavailable(devid); | |
1023 | if (ff_layout_has_available_ds(lseg)) | |
1024 | return -NFS4ERR_RESET_TO_PNFS; | |
1025 | else | |
1026 | return -NFS4ERR_RESET_TO_MDS; | |
1027 | } | |
1028 | ||
1029 | if (task->tk_status == -EJUKEBOX) | |
1030 | nfs_inc_stats(lseg->pls_layout->plh_inode, NFSIOS_DELAY); | |
1031 | task->tk_status = 0; | |
1032 | rpc_restart_call(task); | |
1033 | rpc_delay(task, NFS_JUKEBOX_RETRY_TIME); | |
1034 | return -EAGAIN; | |
1035 | } | |
1036 | ||
1037 | static int ff_layout_async_handle_error(struct rpc_task *task, | |
1038 | struct nfs4_state *state, | |
1039 | struct nfs_client *clp, | |
1040 | struct pnfs_layout_segment *lseg, | |
1041 | int idx) | |
1042 | { | |
1043 | int vers = clp->cl_nfs_mod->rpc_vers->number; | |
1044 | ||
1045 | switch (vers) { | |
1046 | case 3: | |
1047 | return ff_layout_async_handle_error_v3(task, lseg, idx); | |
1048 | case 4: | |
1049 | return ff_layout_async_handle_error_v4(task, state, clp, | |
1050 | lseg, idx); | |
1051 | default: | |
1052 | /* should never happen */ | |
1053 | WARN_ON_ONCE(1); | |
1054 | return 0; | |
1055 | } | |
1056 | } | |
1057 | ||
1058 | static void ff_layout_io_track_ds_error(struct pnfs_layout_segment *lseg, | |
1059 | int idx, u64 offset, u64 length, | |
dd52128a | 1060 | u32 status, int opnum, int error) |
d67ae825 TH |
1061 | { |
1062 | struct nfs4_ff_layout_mirror *mirror; | |
1063 | int err; | |
1064 | ||
dd52128a TM |
1065 | if (status == 0) { |
1066 | switch (error) { | |
1067 | case -ETIMEDOUT: | |
1068 | case -EPFNOSUPPORT: | |
1069 | case -EPROTONOSUPPORT: | |
1070 | case -EOPNOTSUPP: | |
1071 | case -ECONNREFUSED: | |
1072 | case -ECONNRESET: | |
1073 | case -EHOSTDOWN: | |
1074 | case -EHOSTUNREACH: | |
1075 | case -ENETUNREACH: | |
1076 | case -EADDRINUSE: | |
1077 | case -ENOBUFS: | |
1078 | case -EPIPE: | |
1079 | case -EPERM: | |
1080 | status = NFS4ERR_NXIO; | |
1081 | break; | |
1082 | case -EACCES: | |
1083 | status = NFS4ERR_ACCESS; | |
1084 | break; | |
1085 | default: | |
1086 | return; | |
1087 | } | |
1088 | } | |
1089 | ||
d67ae825 TH |
1090 | mirror = FF_LAYOUT_COMP(lseg, idx); |
1091 | err = ff_layout_track_ds_error(FF_LAYOUT_FROM_HDR(lseg->pls_layout), | |
1092 | mirror, offset, length, status, opnum, | |
1093 | GFP_NOIO); | |
1094 | dprintk("%s: err %d op %d status %u\n", __func__, err, opnum, status); | |
1095 | } | |
1096 | ||
1097 | /* NFS_PROTO call done callback routines */ | |
1098 | ||
1099 | static int ff_layout_read_done_cb(struct rpc_task *task, | |
1100 | struct nfs_pgio_header *hdr) | |
1101 | { | |
1102 | struct inode *inode; | |
1103 | int err; | |
1104 | ||
1105 | trace_nfs4_pnfs_read(hdr, task->tk_status); | |
dd52128a | 1106 | if (task->tk_status < 0) |
d67ae825 TH |
1107 | ff_layout_io_track_ds_error(hdr->lseg, hdr->pgio_mirror_idx, |
1108 | hdr->args.offset, hdr->args.count, | |
dd52128a TM |
1109 | hdr->res.op_status, OP_READ, |
1110 | task->tk_status); | |
d67ae825 TH |
1111 | err = ff_layout_async_handle_error(task, hdr->args.context->state, |
1112 | hdr->ds_clp, hdr->lseg, | |
1113 | hdr->pgio_mirror_idx); | |
1114 | ||
1115 | switch (err) { | |
1116 | case -NFS4ERR_RESET_TO_PNFS: | |
1117 | set_bit(NFS_LAYOUT_RETURN_BEFORE_CLOSE, | |
1118 | &hdr->lseg->pls_layout->plh_flags); | |
1119 | pnfs_read_resend_pnfs(hdr); | |
1120 | return task->tk_status; | |
1121 | case -NFS4ERR_RESET_TO_MDS: | |
1122 | inode = hdr->lseg->pls_layout->plh_inode; | |
1123 | pnfs_error_mark_layout_for_return(inode, hdr->lseg); | |
1124 | ff_layout_reset_read(hdr); | |
1125 | return task->tk_status; | |
1126 | case -EAGAIN: | |
1127 | rpc_restart_call_prepare(task); | |
1128 | return -EAGAIN; | |
1129 | } | |
1130 | ||
1131 | return 0; | |
1132 | } | |
1133 | ||
c0f5f505 TM |
1134 | static bool |
1135 | ff_layout_need_layoutcommit(struct pnfs_layout_segment *lseg) | |
1136 | { | |
1137 | return !(FF_LAYOUT_LSEG(lseg)->flags & FF_FLAGS_NO_LAYOUTCOMMIT); | |
1138 | } | |
1139 | ||
d67ae825 TH |
1140 | /* |
1141 | * We reference the rpc_cred of the first WRITE that triggers the need for | |
1142 | * a LAYOUTCOMMIT, and use it to send the layoutcommit compound. | |
1143 | * rfc5661 is not clear about which credential should be used. | |
1144 | * | |
1145 | * Flexlayout client should treat DS replied FILE_SYNC as DATA_SYNC, so | |
1146 | * to follow http://www.rfc-editor.org/errata_search.php?rfc=5661&eid=2751 | |
1147 | * we always send layoutcommit after DS writes. | |
1148 | */ | |
1149 | static void | |
1150 | ff_layout_set_layoutcommit(struct nfs_pgio_header *hdr) | |
1151 | { | |
c0f5f505 TM |
1152 | if (!ff_layout_need_layoutcommit(hdr->lseg)) |
1153 | return; | |
1154 | ||
67af7611 TM |
1155 | pnfs_set_layoutcommit(hdr->inode, hdr->lseg, |
1156 | hdr->mds_offset + hdr->res.count); | |
d67ae825 TH |
1157 | dprintk("%s inode %lu pls_end_pos %lu\n", __func__, hdr->inode->i_ino, |
1158 | (unsigned long) NFS_I(hdr->inode)->layout->plh_lwb); | |
1159 | } | |
1160 | ||
1161 | static bool | |
1162 | ff_layout_reset_to_mds(struct pnfs_layout_segment *lseg, int idx) | |
1163 | { | |
1164 | /* No mirroring for now */ | |
1165 | struct nfs4_deviceid_node *node = FF_LAYOUT_DEVID_NODE(lseg, idx); | |
1166 | ||
1167 | return ff_layout_test_devid_unavailable(node); | |
1168 | } | |
1169 | ||
1170 | static int ff_layout_read_prepare_common(struct rpc_task *task, | |
1171 | struct nfs_pgio_header *hdr) | |
1172 | { | |
0b7baf94 | 1173 | nfs4_ff_layout_stat_io_start_read(hdr->inode, |
abcb7bfc | 1174 | FF_LAYOUT_COMP(hdr->lseg, hdr->pgio_mirror_idx), |
e76d28dd TM |
1175 | hdr->args.count, |
1176 | task->tk_start); | |
abcb7bfc | 1177 | |
d67ae825 TH |
1178 | if (unlikely(test_bit(NFS_CONTEXT_BAD, &hdr->args.context->flags))) { |
1179 | rpc_exit(task, -EIO); | |
1180 | return -EIO; | |
1181 | } | |
1182 | if (ff_layout_reset_to_mds(hdr->lseg, hdr->pgio_mirror_idx)) { | |
1183 | dprintk("%s task %u reset io to MDS\n", __func__, task->tk_pid); | |
1184 | if (ff_layout_has_available_ds(hdr->lseg)) | |
1185 | pnfs_read_resend_pnfs(hdr); | |
1186 | else | |
1187 | ff_layout_reset_read(hdr); | |
1188 | rpc_exit(task, 0); | |
1189 | return -EAGAIN; | |
1190 | } | |
1191 | hdr->pgio_done_cb = ff_layout_read_done_cb; | |
1192 | ||
1193 | return 0; | |
1194 | } | |
1195 | ||
1196 | /* | |
1197 | * Call ops for the async read/write cases | |
1198 | * In the case of dense layouts, the offset needs to be reset to its | |
1199 | * original value. | |
1200 | */ | |
1201 | static void ff_layout_read_prepare_v3(struct rpc_task *task, void *data) | |
1202 | { | |
1203 | struct nfs_pgio_header *hdr = data; | |
1204 | ||
1205 | if (ff_layout_read_prepare_common(task, hdr)) | |
1206 | return; | |
1207 | ||
1208 | rpc_call_start(task); | |
1209 | } | |
1210 | ||
1211 | static int ff_layout_setup_sequence(struct nfs_client *ds_clp, | |
1212 | struct nfs4_sequence_args *args, | |
1213 | struct nfs4_sequence_res *res, | |
1214 | struct rpc_task *task) | |
1215 | { | |
1216 | if (ds_clp->cl_session) | |
1217 | return nfs41_setup_sequence(ds_clp->cl_session, | |
1218 | args, | |
1219 | res, | |
1220 | task); | |
1221 | return nfs40_setup_sequence(ds_clp->cl_slot_tbl, | |
1222 | args, | |
1223 | res, | |
1224 | task); | |
1225 | } | |
1226 | ||
1227 | static void ff_layout_read_prepare_v4(struct rpc_task *task, void *data) | |
1228 | { | |
1229 | struct nfs_pgio_header *hdr = data; | |
1230 | ||
d67ae825 TH |
1231 | if (ff_layout_setup_sequence(hdr->ds_clp, |
1232 | &hdr->args.seq_args, | |
1233 | &hdr->res.seq_res, | |
1234 | task)) | |
1235 | return; | |
1236 | ||
abcb7bfc TM |
1237 | if (ff_layout_read_prepare_common(task, hdr)) |
1238 | return; | |
1239 | ||
d67ae825 TH |
1240 | if (nfs4_set_rw_stateid(&hdr->args.stateid, hdr->args.context, |
1241 | hdr->args.lock_context, FMODE_READ) == -EIO) | |
1242 | rpc_exit(task, -EIO); /* lost lock, terminate I/O */ | |
1243 | } | |
1244 | ||
1245 | static void ff_layout_read_call_done(struct rpc_task *task, void *data) | |
1246 | { | |
1247 | struct nfs_pgio_header *hdr = data; | |
1248 | ||
1249 | dprintk("--> %s task->tk_status %d\n", __func__, task->tk_status); | |
1250 | ||
abcb7bfc TM |
1251 | nfs4_ff_layout_stat_io_end_read(task, |
1252 | FF_LAYOUT_COMP(hdr->lseg, hdr->pgio_mirror_idx), | |
1253 | hdr->args.count, hdr->res.count); | |
1254 | ||
d67ae825 TH |
1255 | if (test_bit(NFS_IOHDR_REDO, &hdr->flags) && |
1256 | task->tk_status == 0) { | |
1257 | nfs4_sequence_done(task, &hdr->res.seq_res); | |
1258 | return; | |
1259 | } | |
1260 | ||
1261 | /* Note this may cause RPC to be resent */ | |
1262 | hdr->mds_ops->rpc_call_done(task, hdr); | |
1263 | } | |
1264 | ||
1265 | static void ff_layout_read_count_stats(struct rpc_task *task, void *data) | |
1266 | { | |
1267 | struct nfs_pgio_header *hdr = data; | |
1268 | ||
1269 | rpc_count_iostats_metrics(task, | |
1270 | &NFS_CLIENT(hdr->inode)->cl_metrics[NFSPROC4_CLNT_READ]); | |
1271 | } | |
1272 | ||
1273 | static int ff_layout_write_done_cb(struct rpc_task *task, | |
1274 | struct nfs_pgio_header *hdr) | |
1275 | { | |
1276 | struct inode *inode; | |
1277 | int err; | |
1278 | ||
1279 | trace_nfs4_pnfs_write(hdr, task->tk_status); | |
dd52128a | 1280 | if (task->tk_status < 0) |
d67ae825 TH |
1281 | ff_layout_io_track_ds_error(hdr->lseg, hdr->pgio_mirror_idx, |
1282 | hdr->args.offset, hdr->args.count, | |
dd52128a TM |
1283 | hdr->res.op_status, OP_WRITE, |
1284 | task->tk_status); | |
d67ae825 TH |
1285 | err = ff_layout_async_handle_error(task, hdr->args.context->state, |
1286 | hdr->ds_clp, hdr->lseg, | |
1287 | hdr->pgio_mirror_idx); | |
1288 | ||
1289 | switch (err) { | |
1290 | case -NFS4ERR_RESET_TO_PNFS: | |
1291 | case -NFS4ERR_RESET_TO_MDS: | |
1292 | inode = hdr->lseg->pls_layout->plh_inode; | |
1293 | pnfs_error_mark_layout_for_return(inode, hdr->lseg); | |
1294 | if (err == -NFS4ERR_RESET_TO_PNFS) { | |
1295 | pnfs_set_retry_layoutget(hdr->lseg->pls_layout); | |
1296 | ff_layout_reset_write(hdr, true); | |
1297 | } else { | |
1298 | pnfs_clear_retry_layoutget(hdr->lseg->pls_layout); | |
1299 | ff_layout_reset_write(hdr, false); | |
1300 | } | |
1301 | return task->tk_status; | |
1302 | case -EAGAIN: | |
1303 | rpc_restart_call_prepare(task); | |
1304 | return -EAGAIN; | |
1305 | } | |
1306 | ||
1307 | if (hdr->res.verf->committed == NFS_FILE_SYNC || | |
1308 | hdr->res.verf->committed == NFS_DATA_SYNC) | |
1309 | ff_layout_set_layoutcommit(hdr); | |
1310 | ||
54204010 PT |
1311 | /* zero out fattr since we don't care DS attr at all */ |
1312 | hdr->fattr.valid = 0; | |
69f230d9 PT |
1313 | if (task->tk_status >= 0) |
1314 | nfs_writeback_update_inode(hdr); | |
1315 | ||
d67ae825 TH |
1316 | return 0; |
1317 | } | |
1318 | ||
1319 | static int ff_layout_commit_done_cb(struct rpc_task *task, | |
1320 | struct nfs_commit_data *data) | |
1321 | { | |
1322 | struct inode *inode; | |
1323 | int err; | |
1324 | ||
1325 | trace_nfs4_pnfs_commit_ds(data, task->tk_status); | |
dd52128a | 1326 | if (task->tk_status < 0) |
d67ae825 TH |
1327 | ff_layout_io_track_ds_error(data->lseg, data->ds_commit_index, |
1328 | data->args.offset, data->args.count, | |
dd52128a TM |
1329 | data->res.op_status, OP_COMMIT, |
1330 | task->tk_status); | |
d67ae825 TH |
1331 | err = ff_layout_async_handle_error(task, NULL, data->ds_clp, |
1332 | data->lseg, data->ds_commit_index); | |
1333 | ||
1334 | switch (err) { | |
1335 | case -NFS4ERR_RESET_TO_PNFS: | |
1336 | case -NFS4ERR_RESET_TO_MDS: | |
1337 | inode = data->lseg->pls_layout->plh_inode; | |
1338 | pnfs_error_mark_layout_for_return(inode, data->lseg); | |
1339 | if (err == -NFS4ERR_RESET_TO_PNFS) | |
1340 | pnfs_set_retry_layoutget(data->lseg->pls_layout); | |
1341 | else | |
1342 | pnfs_clear_retry_layoutget(data->lseg->pls_layout); | |
1343 | pnfs_generic_prepare_to_resend_writes(data); | |
1344 | return -EAGAIN; | |
1345 | case -EAGAIN: | |
1346 | rpc_restart_call_prepare(task); | |
1347 | return -EAGAIN; | |
1348 | } | |
1349 | ||
c0f5f505 TM |
1350 | if (data->verf.committed == NFS_UNSTABLE |
1351 | && ff_layout_need_layoutcommit(data->lseg)) | |
67af7611 | 1352 | pnfs_set_layoutcommit(data->inode, data->lseg, data->lwb); |
d67ae825 TH |
1353 | |
1354 | return 0; | |
1355 | } | |
1356 | ||
1357 | static int ff_layout_write_prepare_common(struct rpc_task *task, | |
1358 | struct nfs_pgio_header *hdr) | |
1359 | { | |
0b7baf94 | 1360 | nfs4_ff_layout_stat_io_start_write(hdr->inode, |
abcb7bfc | 1361 | FF_LAYOUT_COMP(hdr->lseg, hdr->pgio_mirror_idx), |
e76d28dd TM |
1362 | hdr->args.count, |
1363 | task->tk_start); | |
abcb7bfc | 1364 | |
d67ae825 TH |
1365 | if (unlikely(test_bit(NFS_CONTEXT_BAD, &hdr->args.context->flags))) { |
1366 | rpc_exit(task, -EIO); | |
1367 | return -EIO; | |
1368 | } | |
1369 | ||
1370 | if (ff_layout_reset_to_mds(hdr->lseg, hdr->pgio_mirror_idx)) { | |
1371 | bool retry_pnfs; | |
1372 | ||
1373 | retry_pnfs = ff_layout_has_available_ds(hdr->lseg); | |
1374 | dprintk("%s task %u reset io to %s\n", __func__, | |
1375 | task->tk_pid, retry_pnfs ? "pNFS" : "MDS"); | |
1376 | ff_layout_reset_write(hdr, retry_pnfs); | |
1377 | rpc_exit(task, 0); | |
1378 | return -EAGAIN; | |
1379 | } | |
1380 | ||
1381 | return 0; | |
1382 | } | |
1383 | ||
1384 | static void ff_layout_write_prepare_v3(struct rpc_task *task, void *data) | |
1385 | { | |
1386 | struct nfs_pgio_header *hdr = data; | |
1387 | ||
1388 | if (ff_layout_write_prepare_common(task, hdr)) | |
1389 | return; | |
1390 | ||
1391 | rpc_call_start(task); | |
1392 | } | |
1393 | ||
1394 | static void ff_layout_write_prepare_v4(struct rpc_task *task, void *data) | |
1395 | { | |
1396 | struct nfs_pgio_header *hdr = data; | |
1397 | ||
d67ae825 TH |
1398 | if (ff_layout_setup_sequence(hdr->ds_clp, |
1399 | &hdr->args.seq_args, | |
1400 | &hdr->res.seq_res, | |
1401 | task)) | |
1402 | return; | |
1403 | ||
abcb7bfc TM |
1404 | if (ff_layout_write_prepare_common(task, hdr)) |
1405 | return; | |
1406 | ||
d67ae825 TH |
1407 | if (nfs4_set_rw_stateid(&hdr->args.stateid, hdr->args.context, |
1408 | hdr->args.lock_context, FMODE_WRITE) == -EIO) | |
1409 | rpc_exit(task, -EIO); /* lost lock, terminate I/O */ | |
1410 | } | |
1411 | ||
1412 | static void ff_layout_write_call_done(struct rpc_task *task, void *data) | |
1413 | { | |
1414 | struct nfs_pgio_header *hdr = data; | |
1415 | ||
abcb7bfc TM |
1416 | nfs4_ff_layout_stat_io_end_write(task, |
1417 | FF_LAYOUT_COMP(hdr->lseg, hdr->pgio_mirror_idx), | |
1418 | hdr->args.count, hdr->res.count, | |
1419 | hdr->res.verf->committed); | |
1420 | ||
d67ae825 TH |
1421 | if (test_bit(NFS_IOHDR_REDO, &hdr->flags) && |
1422 | task->tk_status == 0) { | |
1423 | nfs4_sequence_done(task, &hdr->res.seq_res); | |
1424 | return; | |
1425 | } | |
1426 | ||
1427 | /* Note this may cause RPC to be resent */ | |
1428 | hdr->mds_ops->rpc_call_done(task, hdr); | |
1429 | } | |
1430 | ||
1431 | static void ff_layout_write_count_stats(struct rpc_task *task, void *data) | |
1432 | { | |
1433 | struct nfs_pgio_header *hdr = data; | |
1434 | ||
1435 | rpc_count_iostats_metrics(task, | |
1436 | &NFS_CLIENT(hdr->inode)->cl_metrics[NFSPROC4_CLNT_WRITE]); | |
1437 | } | |
1438 | ||
abcb7bfc TM |
1439 | static void ff_layout_commit_prepare_common(struct rpc_task *task, |
1440 | struct nfs_commit_data *cdata) | |
1441 | { | |
0b7baf94 | 1442 | nfs4_ff_layout_stat_io_start_write(cdata->inode, |
abcb7bfc | 1443 | FF_LAYOUT_COMP(cdata->lseg, cdata->ds_commit_index), |
e76d28dd | 1444 | 0, task->tk_start); |
abcb7bfc TM |
1445 | } |
1446 | ||
d67ae825 TH |
1447 | static void ff_layout_commit_prepare_v3(struct rpc_task *task, void *data) |
1448 | { | |
abcb7bfc | 1449 | ff_layout_commit_prepare_common(task, data); |
d67ae825 TH |
1450 | rpc_call_start(task); |
1451 | } | |
1452 | ||
1453 | static void ff_layout_commit_prepare_v4(struct rpc_task *task, void *data) | |
1454 | { | |
1455 | struct nfs_commit_data *wdata = data; | |
1456 | ||
abcb7bfc | 1457 | if (ff_layout_setup_sequence(wdata->ds_clp, |
d67ae825 TH |
1458 | &wdata->args.seq_args, |
1459 | &wdata->res.seq_res, | |
abcb7bfc TM |
1460 | task)) |
1461 | return; | |
1462 | ff_layout_commit_prepare_common(task, data); | |
1463 | } | |
1464 | ||
1465 | static void ff_layout_commit_done(struct rpc_task *task, void *data) | |
1466 | { | |
1467 | struct nfs_commit_data *cdata = data; | |
1468 | struct nfs_page *req; | |
1469 | __u64 count = 0; | |
1470 | ||
1471 | if (task->tk_status == 0) { | |
1472 | list_for_each_entry(req, &cdata->pages, wb_list) | |
1473 | count += req->wb_bytes; | |
1474 | } | |
1475 | ||
1476 | nfs4_ff_layout_stat_io_end_write(task, | |
1477 | FF_LAYOUT_COMP(cdata->lseg, cdata->ds_commit_index), | |
1478 | count, count, NFS_FILE_SYNC); | |
1479 | ||
1480 | pnfs_generic_write_commit_done(task, data); | |
d67ae825 TH |
1481 | } |
1482 | ||
1483 | static void ff_layout_commit_count_stats(struct rpc_task *task, void *data) | |
1484 | { | |
1485 | struct nfs_commit_data *cdata = data; | |
1486 | ||
1487 | rpc_count_iostats_metrics(task, | |
1488 | &NFS_CLIENT(cdata->inode)->cl_metrics[NFSPROC4_CLNT_COMMIT]); | |
1489 | } | |
1490 | ||
1491 | static const struct rpc_call_ops ff_layout_read_call_ops_v3 = { | |
1492 | .rpc_call_prepare = ff_layout_read_prepare_v3, | |
1493 | .rpc_call_done = ff_layout_read_call_done, | |
1494 | .rpc_count_stats = ff_layout_read_count_stats, | |
1495 | .rpc_release = pnfs_generic_rw_release, | |
1496 | }; | |
1497 | ||
1498 | static const struct rpc_call_ops ff_layout_read_call_ops_v4 = { | |
1499 | .rpc_call_prepare = ff_layout_read_prepare_v4, | |
1500 | .rpc_call_done = ff_layout_read_call_done, | |
1501 | .rpc_count_stats = ff_layout_read_count_stats, | |
1502 | .rpc_release = pnfs_generic_rw_release, | |
1503 | }; | |
1504 | ||
1505 | static const struct rpc_call_ops ff_layout_write_call_ops_v3 = { | |
1506 | .rpc_call_prepare = ff_layout_write_prepare_v3, | |
1507 | .rpc_call_done = ff_layout_write_call_done, | |
1508 | .rpc_count_stats = ff_layout_write_count_stats, | |
1509 | .rpc_release = pnfs_generic_rw_release, | |
1510 | }; | |
1511 | ||
1512 | static const struct rpc_call_ops ff_layout_write_call_ops_v4 = { | |
1513 | .rpc_call_prepare = ff_layout_write_prepare_v4, | |
1514 | .rpc_call_done = ff_layout_write_call_done, | |
1515 | .rpc_count_stats = ff_layout_write_count_stats, | |
1516 | .rpc_release = pnfs_generic_rw_release, | |
1517 | }; | |
1518 | ||
1519 | static const struct rpc_call_ops ff_layout_commit_call_ops_v3 = { | |
1520 | .rpc_call_prepare = ff_layout_commit_prepare_v3, | |
abcb7bfc | 1521 | .rpc_call_done = ff_layout_commit_done, |
d67ae825 TH |
1522 | .rpc_count_stats = ff_layout_commit_count_stats, |
1523 | .rpc_release = pnfs_generic_commit_release, | |
1524 | }; | |
1525 | ||
1526 | static const struct rpc_call_ops ff_layout_commit_call_ops_v4 = { | |
1527 | .rpc_call_prepare = ff_layout_commit_prepare_v4, | |
abcb7bfc | 1528 | .rpc_call_done = ff_layout_commit_done, |
d67ae825 TH |
1529 | .rpc_count_stats = ff_layout_commit_count_stats, |
1530 | .rpc_release = pnfs_generic_commit_release, | |
1531 | }; | |
1532 | ||
1533 | static enum pnfs_try_status | |
1534 | ff_layout_read_pagelist(struct nfs_pgio_header *hdr) | |
1535 | { | |
1536 | struct pnfs_layout_segment *lseg = hdr->lseg; | |
1537 | struct nfs4_pnfs_ds *ds; | |
1538 | struct rpc_clnt *ds_clnt; | |
1539 | struct rpc_cred *ds_cred; | |
1540 | loff_t offset = hdr->args.offset; | |
1541 | u32 idx = hdr->pgio_mirror_idx; | |
1542 | int vers; | |
1543 | struct nfs_fh *fh; | |
1544 | ||
1545 | dprintk("--> %s ino %lu pgbase %u req %Zu@%llu\n", | |
1546 | __func__, hdr->inode->i_ino, | |
1547 | hdr->args.pgbase, (size_t)hdr->args.count, offset); | |
1548 | ||
1549 | ds = nfs4_ff_layout_prepare_ds(lseg, idx, false); | |
1550 | if (!ds) | |
1551 | goto out_failed; | |
1552 | ||
1553 | ds_clnt = nfs4_ff_find_or_create_ds_client(lseg, idx, ds->ds_clp, | |
1554 | hdr->inode); | |
1555 | if (IS_ERR(ds_clnt)) | |
1556 | goto out_failed; | |
1557 | ||
1558 | ds_cred = ff_layout_get_ds_cred(lseg, idx, hdr->cred); | |
1559 | if (IS_ERR(ds_cred)) | |
1560 | goto out_failed; | |
1561 | ||
1562 | vers = nfs4_ff_layout_ds_version(lseg, idx); | |
1563 | ||
1564 | dprintk("%s USE DS: %s cl_count %d vers %d\n", __func__, | |
1565 | ds->ds_remotestr, atomic_read(&ds->ds_clp->cl_count), vers); | |
1566 | ||
1567 | atomic_inc(&ds->ds_clp->cl_count); | |
1568 | hdr->ds_clp = ds->ds_clp; | |
1569 | fh = nfs4_ff_layout_select_ds_fh(lseg, idx); | |
1570 | if (fh) | |
1571 | hdr->args.fh = fh; | |
d67ae825 TH |
1572 | /* |
1573 | * Note that if we ever decide to split across DSes, | |
1574 | * then we may need to handle dense-like offsets. | |
1575 | */ | |
1576 | hdr->args.offset = offset; | |
1577 | hdr->mds_offset = offset; | |
1578 | ||
1579 | /* Perform an asynchronous read to ds */ | |
1580 | nfs_initiate_pgio(ds_clnt, hdr, ds_cred, ds->ds_clp->rpc_ops, | |
1581 | vers == 3 ? &ff_layout_read_call_ops_v3 : | |
1582 | &ff_layout_read_call_ops_v4, | |
1583 | 0, RPC_TASK_SOFTCONN); | |
1584 | ||
1585 | return PNFS_ATTEMPTED; | |
1586 | ||
1587 | out_failed: | |
1588 | if (ff_layout_has_available_ds(lseg)) | |
1589 | return PNFS_TRY_AGAIN; | |
1590 | return PNFS_NOT_ATTEMPTED; | |
1591 | } | |
1592 | ||
1593 | /* Perform async writes. */ | |
1594 | static enum pnfs_try_status | |
1595 | ff_layout_write_pagelist(struct nfs_pgio_header *hdr, int sync) | |
1596 | { | |
1597 | struct pnfs_layout_segment *lseg = hdr->lseg; | |
1598 | struct nfs4_pnfs_ds *ds; | |
1599 | struct rpc_clnt *ds_clnt; | |
1600 | struct rpc_cred *ds_cred; | |
1601 | loff_t offset = hdr->args.offset; | |
1602 | int vers; | |
1603 | struct nfs_fh *fh; | |
1604 | int idx = hdr->pgio_mirror_idx; | |
1605 | ||
1606 | ds = nfs4_ff_layout_prepare_ds(lseg, idx, true); | |
1607 | if (!ds) | |
1608 | return PNFS_NOT_ATTEMPTED; | |
1609 | ||
1610 | ds_clnt = nfs4_ff_find_or_create_ds_client(lseg, idx, ds->ds_clp, | |
1611 | hdr->inode); | |
1612 | if (IS_ERR(ds_clnt)) | |
1613 | return PNFS_NOT_ATTEMPTED; | |
1614 | ||
1615 | ds_cred = ff_layout_get_ds_cred(lseg, idx, hdr->cred); | |
1616 | if (IS_ERR(ds_cred)) | |
1617 | return PNFS_NOT_ATTEMPTED; | |
1618 | ||
1619 | vers = nfs4_ff_layout_ds_version(lseg, idx); | |
1620 | ||
1621 | dprintk("%s ino %lu sync %d req %Zu@%llu DS: %s cl_count %d vers %d\n", | |
1622 | __func__, hdr->inode->i_ino, sync, (size_t) hdr->args.count, | |
1623 | offset, ds->ds_remotestr, atomic_read(&ds->ds_clp->cl_count), | |
1624 | vers); | |
1625 | ||
1626 | hdr->pgio_done_cb = ff_layout_write_done_cb; | |
1627 | atomic_inc(&ds->ds_clp->cl_count); | |
1628 | hdr->ds_clp = ds->ds_clp; | |
1629 | hdr->ds_commit_idx = idx; | |
1630 | fh = nfs4_ff_layout_select_ds_fh(lseg, idx); | |
1631 | if (fh) | |
1632 | hdr->args.fh = fh; | |
1633 | ||
1634 | /* | |
1635 | * Note that if we ever decide to split across DSes, | |
1636 | * then we may need to handle dense-like offsets. | |
1637 | */ | |
1638 | hdr->args.offset = offset; | |
1639 | ||
1640 | /* Perform an asynchronous write */ | |
1641 | nfs_initiate_pgio(ds_clnt, hdr, ds_cred, ds->ds_clp->rpc_ops, | |
1642 | vers == 3 ? &ff_layout_write_call_ops_v3 : | |
1643 | &ff_layout_write_call_ops_v4, | |
1644 | sync, RPC_TASK_SOFTCONN); | |
1645 | return PNFS_ATTEMPTED; | |
1646 | } | |
1647 | ||
d67ae825 TH |
1648 | static u32 calc_ds_index_from_commit(struct pnfs_layout_segment *lseg, u32 i) |
1649 | { | |
1650 | return i; | |
1651 | } | |
1652 | ||
1653 | static struct nfs_fh * | |
1654 | select_ds_fh_from_commit(struct pnfs_layout_segment *lseg, u32 i) | |
1655 | { | |
1656 | struct nfs4_ff_layout_segment *flseg = FF_LAYOUT_LSEG(lseg); | |
1657 | ||
1658 | /* FIXME: Assume that there is only one NFS version available | |
1659 | * for the DS. | |
1660 | */ | |
1661 | return &flseg->mirror_array[i]->fh_versions[0]; | |
1662 | } | |
1663 | ||
1664 | static int ff_layout_initiate_commit(struct nfs_commit_data *data, int how) | |
1665 | { | |
1666 | struct pnfs_layout_segment *lseg = data->lseg; | |
1667 | struct nfs4_pnfs_ds *ds; | |
1668 | struct rpc_clnt *ds_clnt; | |
1669 | struct rpc_cred *ds_cred; | |
1670 | u32 idx; | |
1671 | int vers; | |
1672 | struct nfs_fh *fh; | |
1673 | ||
1674 | idx = calc_ds_index_from_commit(lseg, data->ds_commit_index); | |
1675 | ds = nfs4_ff_layout_prepare_ds(lseg, idx, true); | |
1676 | if (!ds) | |
1677 | goto out_err; | |
1678 | ||
1679 | ds_clnt = nfs4_ff_find_or_create_ds_client(lseg, idx, ds->ds_clp, | |
1680 | data->inode); | |
1681 | if (IS_ERR(ds_clnt)) | |
1682 | goto out_err; | |
1683 | ||
1684 | ds_cred = ff_layout_get_ds_cred(lseg, idx, data->cred); | |
1685 | if (IS_ERR(ds_cred)) | |
1686 | goto out_err; | |
1687 | ||
1688 | vers = nfs4_ff_layout_ds_version(lseg, idx); | |
1689 | ||
1690 | dprintk("%s ino %lu, how %d cl_count %d vers %d\n", __func__, | |
1691 | data->inode->i_ino, how, atomic_read(&ds->ds_clp->cl_count), | |
1692 | vers); | |
1693 | data->commit_done_cb = ff_layout_commit_done_cb; | |
1694 | data->cred = ds_cred; | |
1695 | atomic_inc(&ds->ds_clp->cl_count); | |
1696 | data->ds_clp = ds->ds_clp; | |
1697 | fh = select_ds_fh_from_commit(lseg, data->ds_commit_index); | |
1698 | if (fh) | |
1699 | data->args.fh = fh; | |
abcb7bfc | 1700 | |
d67ae825 TH |
1701 | return nfs_initiate_commit(ds_clnt, data, ds->ds_clp->rpc_ops, |
1702 | vers == 3 ? &ff_layout_commit_call_ops_v3 : | |
1703 | &ff_layout_commit_call_ops_v4, | |
1704 | how, RPC_TASK_SOFTCONN); | |
1705 | out_err: | |
1706 | pnfs_generic_prepare_to_resend_writes(data); | |
1707 | pnfs_generic_commit_release(data); | |
1708 | return -EAGAIN; | |
1709 | } | |
1710 | ||
1711 | static int | |
1712 | ff_layout_commit_pagelist(struct inode *inode, struct list_head *mds_pages, | |
1713 | int how, struct nfs_commit_info *cinfo) | |
1714 | { | |
1715 | return pnfs_generic_commit_pagelist(inode, mds_pages, how, cinfo, | |
1716 | ff_layout_initiate_commit); | |
1717 | } | |
1718 | ||
1719 | static struct pnfs_ds_commit_info * | |
1720 | ff_layout_get_ds_info(struct inode *inode) | |
1721 | { | |
1722 | struct pnfs_layout_hdr *layout = NFS_I(inode)->layout; | |
1723 | ||
1724 | if (layout == NULL) | |
1725 | return NULL; | |
1726 | ||
1727 | return &FF_LAYOUT_FROM_HDR(layout)->commit_info; | |
1728 | } | |
1729 | ||
1730 | static void | |
fc87701b | 1731 | ff_layout_free_deviceid_node(struct nfs4_deviceid_node *d) |
d67ae825 TH |
1732 | { |
1733 | nfs4_ff_layout_free_deviceid(container_of(d, struct nfs4_ff_layout_ds, | |
1734 | id_node)); | |
1735 | } | |
1736 | ||
1737 | static int ff_layout_encode_ioerr(struct nfs4_flexfile_layout *flo, | |
1738 | struct xdr_stream *xdr, | |
1739 | const struct nfs4_layoutreturn_args *args) | |
1740 | { | |
1741 | struct pnfs_layout_hdr *hdr = &flo->generic_hdr; | |
1742 | __be32 *start; | |
1743 | int count = 0, ret = 0; | |
1744 | ||
1745 | start = xdr_reserve_space(xdr, 4); | |
1746 | if (unlikely(!start)) | |
1747 | return -E2BIG; | |
1748 | ||
1749 | /* This assume we always return _ALL_ layouts */ | |
1750 | spin_lock(&hdr->plh_inode->i_lock); | |
1751 | ret = ff_layout_encode_ds_ioerr(flo, xdr, &count, &args->range); | |
1752 | spin_unlock(&hdr->plh_inode->i_lock); | |
1753 | ||
1754 | *start = cpu_to_be32(count); | |
1755 | ||
1756 | return ret; | |
1757 | } | |
1758 | ||
1759 | /* report nothing for now */ | |
1760 | static void ff_layout_encode_iostats(struct nfs4_flexfile_layout *flo, | |
1761 | struct xdr_stream *xdr, | |
1762 | const struct nfs4_layoutreturn_args *args) | |
1763 | { | |
1764 | __be32 *p; | |
1765 | ||
1766 | p = xdr_reserve_space(xdr, 4); | |
1767 | if (likely(p)) | |
1768 | *p = cpu_to_be32(0); | |
1769 | } | |
1770 | ||
1771 | static struct nfs4_deviceid_node * | |
1772 | ff_layout_alloc_deviceid_node(struct nfs_server *server, | |
1773 | struct pnfs_device *pdev, gfp_t gfp_flags) | |
1774 | { | |
1775 | struct nfs4_ff_layout_ds *dsaddr; | |
1776 | ||
1777 | dsaddr = nfs4_ff_alloc_deviceid_node(server, pdev, gfp_flags); | |
1778 | if (!dsaddr) | |
1779 | return NULL; | |
1780 | return &dsaddr->id_node; | |
1781 | } | |
1782 | ||
1783 | static void | |
1784 | ff_layout_encode_layoutreturn(struct pnfs_layout_hdr *lo, | |
1785 | struct xdr_stream *xdr, | |
1786 | const struct nfs4_layoutreturn_args *args) | |
1787 | { | |
1788 | struct nfs4_flexfile_layout *flo = FF_LAYOUT_FROM_HDR(lo); | |
1789 | __be32 *start; | |
1790 | ||
1791 | dprintk("%s: Begin\n", __func__); | |
1792 | start = xdr_reserve_space(xdr, 4); | |
1793 | BUG_ON(!start); | |
1794 | ||
1795 | if (ff_layout_encode_ioerr(flo, xdr, args)) | |
1796 | goto out; | |
1797 | ||
1798 | ff_layout_encode_iostats(flo, xdr, args); | |
1799 | out: | |
1800 | *start = cpu_to_be32((xdr->p - start - 1) * 4); | |
1801 | dprintk("%s: Return\n", __func__); | |
1802 | } | |
1803 | ||
27c43064 PT |
1804 | static int |
1805 | ff_layout_ntop4(const struct sockaddr *sap, char *buf, const size_t buflen) | |
1806 | { | |
1807 | const struct sockaddr_in *sin = (struct sockaddr_in *)sap; | |
1808 | ||
1809 | return snprintf(buf, buflen, "%pI4", &sin->sin_addr); | |
1810 | } | |
1811 | ||
1812 | static size_t | |
1813 | ff_layout_ntop6_noscopeid(const struct sockaddr *sap, char *buf, | |
1814 | const int buflen) | |
1815 | { | |
1816 | const struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)sap; | |
1817 | const struct in6_addr *addr = &sin6->sin6_addr; | |
1818 | ||
1819 | /* | |
1820 | * RFC 4291, Section 2.2.2 | |
1821 | * | |
1822 | * Shorthanded ANY address | |
1823 | */ | |
1824 | if (ipv6_addr_any(addr)) | |
1825 | return snprintf(buf, buflen, "::"); | |
1826 | ||
1827 | /* | |
1828 | * RFC 4291, Section 2.2.2 | |
1829 | * | |
1830 | * Shorthanded loopback address | |
1831 | */ | |
1832 | if (ipv6_addr_loopback(addr)) | |
1833 | return snprintf(buf, buflen, "::1"); | |
1834 | ||
1835 | /* | |
1836 | * RFC 4291, Section 2.2.3 | |
1837 | * | |
1838 | * Special presentation address format for mapped v4 | |
1839 | * addresses. | |
1840 | */ | |
1841 | if (ipv6_addr_v4mapped(addr)) | |
1842 | return snprintf(buf, buflen, "::ffff:%pI4", | |
1843 | &addr->s6_addr32[3]); | |
1844 | ||
1845 | /* | |
1846 | * RFC 4291, Section 2.2.1 | |
1847 | */ | |
1848 | return snprintf(buf, buflen, "%pI6c", addr); | |
1849 | } | |
1850 | ||
1851 | /* Derived from rpc_sockaddr2uaddr */ | |
1852 | static void | |
1853 | ff_layout_encode_netaddr(struct xdr_stream *xdr, struct nfs4_pnfs_ds_addr *da) | |
1854 | { | |
1855 | struct sockaddr *sap = (struct sockaddr *)&da->da_addr; | |
1856 | char portbuf[RPCBIND_MAXUADDRPLEN]; | |
1857 | char addrbuf[RPCBIND_MAXUADDRLEN]; | |
1858 | char *netid; | |
1859 | unsigned short port; | |
1860 | int len, netid_len; | |
1861 | __be32 *p; | |
1862 | ||
1863 | switch (sap->sa_family) { | |
1864 | case AF_INET: | |
1865 | if (ff_layout_ntop4(sap, addrbuf, sizeof(addrbuf)) == 0) | |
1866 | return; | |
1867 | port = ntohs(((struct sockaddr_in *)sap)->sin_port); | |
1868 | netid = "tcp"; | |
1869 | netid_len = 3; | |
1870 | break; | |
1871 | case AF_INET6: | |
1872 | if (ff_layout_ntop6_noscopeid(sap, addrbuf, sizeof(addrbuf)) == 0) | |
1873 | return; | |
1874 | port = ntohs(((struct sockaddr_in6 *)sap)->sin6_port); | |
1875 | netid = "tcp6"; | |
1876 | netid_len = 4; | |
1877 | break; | |
1878 | default: | |
1879 | /* we only support tcp and tcp6 */ | |
1880 | WARN_ON_ONCE(1); | |
1881 | return; | |
1882 | } | |
1883 | ||
1884 | snprintf(portbuf, sizeof(portbuf), ".%u.%u", port >> 8, port & 0xff); | |
1885 | len = strlcat(addrbuf, portbuf, sizeof(addrbuf)); | |
1886 | ||
1887 | p = xdr_reserve_space(xdr, 4 + netid_len); | |
1888 | xdr_encode_opaque(p, netid, netid_len); | |
1889 | ||
1890 | p = xdr_reserve_space(xdr, 4 + len); | |
1891 | xdr_encode_opaque(p, addrbuf, len); | |
1892 | } | |
1893 | ||
1894 | static void | |
1895 | ff_layout_encode_nfstime(struct xdr_stream *xdr, | |
1896 | ktime_t t) | |
1897 | { | |
1898 | struct timespec64 ts; | |
1899 | __be32 *p; | |
1900 | ||
1901 | p = xdr_reserve_space(xdr, 12); | |
1902 | ts = ktime_to_timespec64(t); | |
1903 | p = xdr_encode_hyper(p, ts.tv_sec); | |
1904 | *p++ = cpu_to_be32(ts.tv_nsec); | |
1905 | } | |
1906 | ||
1907 | static void | |
1908 | ff_layout_encode_io_latency(struct xdr_stream *xdr, | |
1909 | struct nfs4_ff_io_stat *stat) | |
1910 | { | |
1911 | __be32 *p; | |
1912 | ||
1913 | p = xdr_reserve_space(xdr, 5 * 8); | |
1914 | p = xdr_encode_hyper(p, stat->ops_requested); | |
1915 | p = xdr_encode_hyper(p, stat->bytes_requested); | |
1916 | p = xdr_encode_hyper(p, stat->ops_completed); | |
1917 | p = xdr_encode_hyper(p, stat->bytes_completed); | |
1918 | p = xdr_encode_hyper(p, stat->bytes_not_delivered); | |
1919 | ff_layout_encode_nfstime(xdr, stat->total_busy_time); | |
1920 | ff_layout_encode_nfstime(xdr, stat->aggregate_completion_time); | |
1921 | } | |
1922 | ||
1923 | static void | |
1924 | ff_layout_encode_layoutstats(struct xdr_stream *xdr, | |
1925 | struct nfs42_layoutstat_args *args, | |
1926 | struct nfs42_layoutstat_devinfo *devinfo) | |
1927 | { | |
1928 | struct nfs4_ff_layout_mirror *mirror = devinfo->layout_private; | |
1929 | struct nfs4_pnfs_ds_addr *da; | |
1930 | struct nfs4_pnfs_ds *ds = mirror->mirror_ds->ds; | |
1931 | struct nfs_fh *fh = &mirror->fh_versions[0]; | |
1932 | __be32 *p, *start; | |
1933 | ||
1934 | da = list_first_entry(&ds->ds_addrs, struct nfs4_pnfs_ds_addr, da_node); | |
1935 | dprintk("%s: DS %s: encoding address %s\n", | |
1936 | __func__, ds->ds_remotestr, da->da_remotestr); | |
1937 | /* layoutupdate length */ | |
1938 | start = xdr_reserve_space(xdr, 4); | |
1939 | /* netaddr4 */ | |
1940 | ff_layout_encode_netaddr(xdr, da); | |
1941 | /* nfs_fh4 */ | |
1942 | p = xdr_reserve_space(xdr, 4 + fh->size); | |
1943 | xdr_encode_opaque(p, fh->data, fh->size); | |
1944 | /* ff_io_latency4 read */ | |
1945 | spin_lock(&mirror->lock); | |
1946 | ff_layout_encode_io_latency(xdr, &mirror->read_stat.io_stat); | |
1947 | /* ff_io_latency4 write */ | |
1948 | ff_layout_encode_io_latency(xdr, &mirror->write_stat.io_stat); | |
1949 | spin_unlock(&mirror->lock); | |
1950 | /* nfstime4 */ | |
1951 | ff_layout_encode_nfstime(xdr, ktime_sub(ktime_get(), mirror->start_time)); | |
1952 | /* bool */ | |
1953 | p = xdr_reserve_space(xdr, 4); | |
1954 | *p = cpu_to_be32(false); | |
1955 | ||
1956 | *start = cpu_to_be32((xdr->p - start - 1) * 4); | |
1957 | } | |
1958 | ||
266d12d4 | 1959 | static int |
ad4dc53e | 1960 | ff_layout_mirror_prepare_stats(struct nfs42_layoutstat_args *args, |
266d12d4 TM |
1961 | struct pnfs_layout_hdr *lo, |
1962 | int dev_limit) | |
ad4dc53e | 1963 | { |
266d12d4 | 1964 | struct nfs4_flexfile_layout *ff_layout = FF_LAYOUT_FROM_HDR(lo); |
ad4dc53e PT |
1965 | struct nfs4_ff_layout_mirror *mirror; |
1966 | struct nfs4_deviceid_node *dev; | |
1967 | struct nfs42_layoutstat_devinfo *devinfo; | |
266d12d4 | 1968 | int i = 0; |
ad4dc53e | 1969 | |
266d12d4 TM |
1970 | list_for_each_entry(mirror, &ff_layout->mirrors, mirrors) { |
1971 | if (i >= dev_limit) | |
ad4dc53e | 1972 | break; |
266d12d4 | 1973 | if (!mirror->mirror_ds) |
27c43064 | 1974 | continue; |
266d12d4 TM |
1975 | /* mirror refcount put in cleanup_layoutstats */ |
1976 | if (!atomic_inc_not_zero(&mirror->ref)) | |
1977 | continue; | |
1978 | dev = &mirror->mirror_ds->id_node; | |
1979 | devinfo = &args->devinfo[i]; | |
ad4dc53e | 1980 | memcpy(&devinfo->dev_id, &dev->deviceid, NFS4_DEVICEID4_SIZE); |
266d12d4 TM |
1981 | devinfo->offset = 0; |
1982 | devinfo->length = NFS4_MAX_UINT64; | |
d099d7b8 | 1983 | devinfo->read_count = mirror->read_stat.io_stat.ops_completed; |
ad4dc53e | 1984 | devinfo->read_bytes = mirror->read_stat.io_stat.bytes_completed; |
d099d7b8 | 1985 | devinfo->write_count = mirror->write_stat.io_stat.ops_completed; |
ad4dc53e PT |
1986 | devinfo->write_bytes = mirror->write_stat.io_stat.bytes_completed; |
1987 | devinfo->layout_type = LAYOUT_FLEX_FILES; | |
27c43064 PT |
1988 | devinfo->layoutstats_encode = ff_layout_encode_layoutstats; |
1989 | devinfo->layout_private = mirror; | |
ad4dc53e | 1990 | |
266d12d4 | 1991 | i++; |
ad4dc53e | 1992 | } |
266d12d4 | 1993 | return i; |
ad4dc53e PT |
1994 | } |
1995 | ||
1996 | static int | |
1997 | ff_layout_prepare_layoutstats(struct nfs42_layoutstat_args *args) | |
1998 | { | |
266d12d4 TM |
1999 | struct nfs4_flexfile_layout *ff_layout; |
2000 | struct nfs4_ff_layout_mirror *mirror; | |
ad4dc53e PT |
2001 | int dev_count = 0; |
2002 | ||
2003 | spin_lock(&args->inode->i_lock); | |
266d12d4 TM |
2004 | ff_layout = FF_LAYOUT_FROM_HDR(NFS_I(args->inode)->layout); |
2005 | list_for_each_entry(mirror, &ff_layout->mirrors, mirrors) { | |
2006 | if (atomic_read(&mirror->ref) != 0) | |
2007 | dev_count ++; | |
ad4dc53e PT |
2008 | } |
2009 | spin_unlock(&args->inode->i_lock); | |
2010 | /* For now, send at most PNFS_LAYOUTSTATS_MAXDEV statistics */ | |
2011 | if (dev_count > PNFS_LAYOUTSTATS_MAXDEV) { | |
2012 | dprintk("%s: truncating devinfo to limit (%d:%d)\n", | |
2013 | __func__, dev_count, PNFS_LAYOUTSTATS_MAXDEV); | |
2014 | dev_count = PNFS_LAYOUTSTATS_MAXDEV; | |
2015 | } | |
266d12d4 | 2016 | args->devinfo = kmalloc_array(dev_count, sizeof(*args->devinfo), GFP_NOIO); |
ad4dc53e PT |
2017 | if (!args->devinfo) |
2018 | return -ENOMEM; | |
2019 | ||
ad4dc53e | 2020 | spin_lock(&args->inode->i_lock); |
266d12d4 TM |
2021 | args->num_dev = ff_layout_mirror_prepare_stats(args, |
2022 | &ff_layout->generic_hdr, dev_count); | |
ad4dc53e | 2023 | spin_unlock(&args->inode->i_lock); |
ad4dc53e PT |
2024 | |
2025 | return 0; | |
2026 | } | |
2027 | ||
27c43064 PT |
2028 | static void |
2029 | ff_layout_cleanup_layoutstats(struct nfs42_layoutstat_data *data) | |
2030 | { | |
2031 | struct nfs4_ff_layout_mirror *mirror; | |
2032 | int i; | |
2033 | ||
2034 | for (i = 0; i < data->args.num_dev; i++) { | |
2035 | mirror = data->args.devinfo[i].layout_private; | |
2036 | data->args.devinfo[i].layout_private = NULL; | |
0b7baf94 | 2037 | ff_layout_put_mirror(mirror); |
27c43064 PT |
2038 | } |
2039 | } | |
2040 | ||
d67ae825 TH |
2041 | static struct pnfs_layoutdriver_type flexfilelayout_type = { |
2042 | .id = LAYOUT_FLEX_FILES, | |
2043 | .name = "LAYOUT_FLEX_FILES", | |
2044 | .owner = THIS_MODULE, | |
2045 | .alloc_layout_hdr = ff_layout_alloc_layout_hdr, | |
2046 | .free_layout_hdr = ff_layout_free_layout_hdr, | |
2047 | .alloc_lseg = ff_layout_alloc_lseg, | |
2048 | .free_lseg = ff_layout_free_lseg, | |
2049 | .pg_read_ops = &ff_layout_pg_read_ops, | |
2050 | .pg_write_ops = &ff_layout_pg_write_ops, | |
2051 | .get_ds_info = ff_layout_get_ds_info, | |
fc87701b | 2052 | .free_deviceid_node = ff_layout_free_deviceid_node, |
338d00cf | 2053 | .mark_request_commit = pnfs_layout_mark_request_commit, |
d67ae825 TH |
2054 | .clear_request_commit = pnfs_generic_clear_request_commit, |
2055 | .scan_commit_lists = pnfs_generic_scan_commit_lists, | |
2056 | .recover_commit_reqs = pnfs_generic_recover_commit_reqs, | |
2057 | .commit_pagelist = ff_layout_commit_pagelist, | |
2058 | .read_pagelist = ff_layout_read_pagelist, | |
2059 | .write_pagelist = ff_layout_write_pagelist, | |
2060 | .alloc_deviceid_node = ff_layout_alloc_deviceid_node, | |
2061 | .encode_layoutreturn = ff_layout_encode_layoutreturn, | |
5bb89b47 | 2062 | .sync = pnfs_nfs_generic_sync, |
ad4dc53e | 2063 | .prepare_layoutstats = ff_layout_prepare_layoutstats, |
27c43064 | 2064 | .cleanup_layoutstats = ff_layout_cleanup_layoutstats, |
d67ae825 TH |
2065 | }; |
2066 | ||
2067 | static int __init nfs4flexfilelayout_init(void) | |
2068 | { | |
2069 | printk(KERN_INFO "%s: NFSv4 Flexfile Layout Driver Registering...\n", | |
2070 | __func__); | |
2071 | return pnfs_register_layoutdriver(&flexfilelayout_type); | |
2072 | } | |
2073 | ||
2074 | static void __exit nfs4flexfilelayout_exit(void) | |
2075 | { | |
2076 | printk(KERN_INFO "%s: NFSv4 Flexfile Layout Driver Unregistering...\n", | |
2077 | __func__); | |
2078 | pnfs_unregister_layoutdriver(&flexfilelayout_type); | |
2079 | } | |
2080 | ||
2081 | MODULE_ALIAS("nfs-layouttype4-4"); | |
2082 | ||
2083 | MODULE_LICENSE("GPL"); | |
2084 | MODULE_DESCRIPTION("The NFSv4 flexfile layout driver"); | |
2085 | ||
2086 | module_init(nfs4flexfilelayout_init); | |
2087 | module_exit(nfs4flexfilelayout_exit); |