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> | |
14 | #include <linux/nfs_idmap.h> | |
15 | ||
16 | #include "flexfilelayout.h" | |
17 | #include "../nfs4session.h" | |
18 | #include "../internal.h" | |
19 | #include "../delegation.h" | |
20 | #include "../nfs4trace.h" | |
21 | #include "../iostat.h" | |
22 | #include "../nfs.h" | |
23 | ||
24 | #define NFSDBG_FACILITY NFSDBG_PNFS_LD | |
25 | ||
26 | #define FF_LAYOUT_POLL_RETRY_MAX (15*HZ) | |
27 | ||
28 | static struct pnfs_layout_hdr * | |
29 | ff_layout_alloc_layout_hdr(struct inode *inode, gfp_t gfp_flags) | |
30 | { | |
31 | struct nfs4_flexfile_layout *ffl; | |
32 | ||
33 | ffl = kzalloc(sizeof(*ffl), gfp_flags); | |
34 | if (ffl) { | |
35 | INIT_LIST_HEAD(&ffl->error_list); | |
36 | return &ffl->generic_hdr; | |
37 | } else | |
38 | return NULL; | |
39 | } | |
40 | ||
41 | static void | |
42 | ff_layout_free_layout_hdr(struct pnfs_layout_hdr *lo) | |
43 | { | |
44 | struct nfs4_ff_layout_ds_err *err, *n; | |
45 | ||
46 | list_for_each_entry_safe(err, n, &FF_LAYOUT_FROM_HDR(lo)->error_list, | |
47 | list) { | |
48 | list_del(&err->list); | |
49 | kfree(err); | |
50 | } | |
51 | kfree(FF_LAYOUT_FROM_HDR(lo)); | |
52 | } | |
53 | ||
54 | static int decode_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid) | |
55 | { | |
56 | __be32 *p; | |
57 | ||
58 | p = xdr_inline_decode(xdr, NFS4_STATEID_SIZE); | |
59 | if (unlikely(p == NULL)) | |
60 | return -ENOBUFS; | |
61 | memcpy(stateid, p, NFS4_STATEID_SIZE); | |
62 | dprintk("%s: stateid id= [%x%x%x%x]\n", __func__, | |
63 | p[0], p[1], p[2], p[3]); | |
64 | return 0; | |
65 | } | |
66 | ||
67 | static int decode_deviceid(struct xdr_stream *xdr, struct nfs4_deviceid *devid) | |
68 | { | |
69 | __be32 *p; | |
70 | ||
71 | p = xdr_inline_decode(xdr, NFS4_DEVICEID4_SIZE); | |
72 | if (unlikely(!p)) | |
73 | return -ENOBUFS; | |
74 | memcpy(devid, p, NFS4_DEVICEID4_SIZE); | |
75 | nfs4_print_deviceid(devid); | |
76 | return 0; | |
77 | } | |
78 | ||
79 | static int decode_nfs_fh(struct xdr_stream *xdr, struct nfs_fh *fh) | |
80 | { | |
81 | __be32 *p; | |
82 | ||
83 | p = xdr_inline_decode(xdr, 4); | |
84 | if (unlikely(!p)) | |
85 | return -ENOBUFS; | |
86 | fh->size = be32_to_cpup(p++); | |
87 | if (fh->size > sizeof(struct nfs_fh)) { | |
88 | printk(KERN_ERR "NFS flexfiles: Too big fh received %d\n", | |
89 | fh->size); | |
90 | return -EOVERFLOW; | |
91 | } | |
92 | /* fh.data */ | |
93 | p = xdr_inline_decode(xdr, fh->size); | |
94 | if (unlikely(!p)) | |
95 | return -ENOBUFS; | |
96 | memcpy(&fh->data, p, fh->size); | |
97 | dprintk("%s: fh len %d\n", __func__, fh->size); | |
98 | ||
99 | return 0; | |
100 | } | |
101 | ||
102 | /* | |
103 | * Currently only stringified uids and gids are accepted. | |
104 | * I.e., kerberos is not supported to the DSes, so no pricipals. | |
105 | * | |
106 | * That means that one common function will suffice, but when | |
107 | * principals are added, this should be split to accomodate | |
108 | * calls to both nfs_map_name_to_uid() and nfs_map_group_to_gid(). | |
109 | */ | |
110 | static int | |
111 | decode_name(struct xdr_stream *xdr, u32 *id) | |
112 | { | |
113 | __be32 *p; | |
114 | int len; | |
115 | ||
116 | /* opaque_length(4)*/ | |
117 | p = xdr_inline_decode(xdr, 4); | |
118 | if (unlikely(!p)) | |
119 | return -ENOBUFS; | |
120 | len = be32_to_cpup(p++); | |
121 | if (len < 0) | |
122 | return -EINVAL; | |
123 | ||
124 | dprintk("%s: len %u\n", __func__, len); | |
125 | ||
126 | /* opaque body */ | |
127 | p = xdr_inline_decode(xdr, len); | |
128 | if (unlikely(!p)) | |
129 | return -ENOBUFS; | |
130 | ||
131 | if (!nfs_map_string_to_numeric((char *)p, len, id)) | |
132 | return -EINVAL; | |
133 | ||
134 | return 0; | |
135 | } | |
136 | ||
137 | static void ff_layout_free_mirror_array(struct nfs4_ff_layout_segment *fls) | |
138 | { | |
139 | int i; | |
140 | ||
141 | if (fls->mirror_array) { | |
142 | for (i = 0; i < fls->mirror_array_cnt; i++) { | |
143 | /* normally mirror_ds is freed in | |
144 | * .free_deviceid_node but we still do it here | |
145 | * for .alloc_lseg error path */ | |
146 | if (fls->mirror_array[i]) { | |
147 | kfree(fls->mirror_array[i]->fh_versions); | |
148 | nfs4_ff_layout_put_deviceid(fls->mirror_array[i]->mirror_ds); | |
149 | kfree(fls->mirror_array[i]); | |
150 | } | |
151 | } | |
152 | kfree(fls->mirror_array); | |
153 | fls->mirror_array = NULL; | |
154 | } | |
155 | } | |
156 | ||
157 | static int ff_layout_check_layout(struct nfs4_layoutget_res *lgr) | |
158 | { | |
159 | int ret = 0; | |
160 | ||
161 | dprintk("--> %s\n", __func__); | |
162 | ||
163 | /* FIXME: remove this check when layout segment support is added */ | |
164 | if (lgr->range.offset != 0 || | |
165 | lgr->range.length != NFS4_MAX_UINT64) { | |
166 | dprintk("%s Only whole file layouts supported. Use MDS i/o\n", | |
167 | __func__); | |
168 | ret = -EINVAL; | |
169 | } | |
170 | ||
171 | dprintk("--> %s returns %d\n", __func__, ret); | |
172 | return ret; | |
173 | } | |
174 | ||
175 | static void _ff_layout_free_lseg(struct nfs4_ff_layout_segment *fls) | |
176 | { | |
177 | if (fls) { | |
178 | ff_layout_free_mirror_array(fls); | |
179 | kfree(fls); | |
180 | } | |
181 | } | |
182 | ||
183 | static void ff_layout_sort_mirrors(struct nfs4_ff_layout_segment *fls) | |
184 | { | |
185 | struct nfs4_ff_layout_mirror *tmp; | |
186 | int i, j; | |
187 | ||
188 | for (i = 0; i < fls->mirror_array_cnt - 1; i++) { | |
189 | for (j = i + 1; j < fls->mirror_array_cnt; j++) | |
190 | if (fls->mirror_array[i]->efficiency < | |
191 | fls->mirror_array[j]->efficiency) { | |
192 | tmp = fls->mirror_array[i]; | |
193 | fls->mirror_array[i] = fls->mirror_array[j]; | |
194 | fls->mirror_array[j] = tmp; | |
195 | } | |
196 | } | |
197 | } | |
198 | ||
199 | static struct pnfs_layout_segment * | |
200 | ff_layout_alloc_lseg(struct pnfs_layout_hdr *lh, | |
201 | struct nfs4_layoutget_res *lgr, | |
202 | gfp_t gfp_flags) | |
203 | { | |
204 | struct pnfs_layout_segment *ret; | |
205 | struct nfs4_ff_layout_segment *fls = NULL; | |
206 | struct xdr_stream stream; | |
207 | struct xdr_buf buf; | |
208 | struct page *scratch; | |
209 | u64 stripe_unit; | |
210 | u32 mirror_array_cnt; | |
211 | __be32 *p; | |
212 | int i, rc; | |
213 | ||
214 | dprintk("--> %s\n", __func__); | |
215 | scratch = alloc_page(gfp_flags); | |
216 | if (!scratch) | |
217 | return ERR_PTR(-ENOMEM); | |
218 | ||
219 | xdr_init_decode_pages(&stream, &buf, lgr->layoutp->pages, | |
220 | lgr->layoutp->len); | |
221 | xdr_set_scratch_buffer(&stream, page_address(scratch), PAGE_SIZE); | |
222 | ||
223 | /* stripe unit and mirror_array_cnt */ | |
224 | rc = -EIO; | |
225 | p = xdr_inline_decode(&stream, 8 + 4); | |
226 | if (!p) | |
227 | goto out_err_free; | |
228 | ||
229 | p = xdr_decode_hyper(p, &stripe_unit); | |
230 | mirror_array_cnt = be32_to_cpup(p++); | |
231 | dprintk("%s: stripe_unit=%llu mirror_array_cnt=%u\n", __func__, | |
232 | stripe_unit, mirror_array_cnt); | |
233 | ||
234 | if (mirror_array_cnt > NFS4_FLEXFILE_LAYOUT_MAX_MIRROR_CNT || | |
235 | mirror_array_cnt == 0) | |
236 | goto out_err_free; | |
237 | ||
238 | rc = -ENOMEM; | |
239 | fls = kzalloc(sizeof(*fls), gfp_flags); | |
240 | if (!fls) | |
241 | goto out_err_free; | |
242 | ||
243 | fls->mirror_array_cnt = mirror_array_cnt; | |
244 | fls->stripe_unit = stripe_unit; | |
245 | fls->mirror_array = kcalloc(fls->mirror_array_cnt, | |
246 | sizeof(fls->mirror_array[0]), gfp_flags); | |
247 | if (fls->mirror_array == NULL) | |
248 | goto out_err_free; | |
249 | ||
250 | for (i = 0; i < fls->mirror_array_cnt; i++) { | |
251 | struct nfs4_deviceid devid; | |
252 | struct nfs4_deviceid_node *idnode; | |
253 | u32 ds_count; | |
254 | u32 fh_count; | |
255 | int j; | |
256 | ||
257 | rc = -EIO; | |
258 | p = xdr_inline_decode(&stream, 4); | |
259 | if (!p) | |
260 | goto out_err_free; | |
261 | ds_count = be32_to_cpup(p); | |
262 | ||
263 | /* FIXME: allow for striping? */ | |
264 | if (ds_count != 1) | |
265 | goto out_err_free; | |
266 | ||
267 | fls->mirror_array[i] = | |
268 | kzalloc(sizeof(struct nfs4_ff_layout_mirror), | |
269 | gfp_flags); | |
270 | if (fls->mirror_array[i] == NULL) { | |
271 | rc = -ENOMEM; | |
272 | goto out_err_free; | |
273 | } | |
274 | ||
275 | spin_lock_init(&fls->mirror_array[i]->lock); | |
276 | fls->mirror_array[i]->ds_count = ds_count; | |
277 | ||
278 | /* deviceid */ | |
279 | rc = decode_deviceid(&stream, &devid); | |
280 | if (rc) | |
281 | goto out_err_free; | |
282 | ||
283 | idnode = nfs4_find_get_deviceid(NFS_SERVER(lh->plh_inode), | |
284 | &devid, lh->plh_lc_cred, | |
285 | gfp_flags); | |
286 | /* | |
287 | * upon success, mirror_ds is allocated by previous | |
288 | * getdeviceinfo, or newly by .alloc_deviceid_node | |
289 | * nfs4_find_get_deviceid failure is indeed getdeviceinfo falure | |
290 | */ | |
291 | if (idnode) | |
292 | fls->mirror_array[i]->mirror_ds = | |
293 | FF_LAYOUT_MIRROR_DS(idnode); | |
294 | else | |
295 | goto out_err_free; | |
296 | ||
297 | /* efficiency */ | |
298 | rc = -EIO; | |
299 | p = xdr_inline_decode(&stream, 4); | |
300 | if (!p) | |
301 | goto out_err_free; | |
302 | fls->mirror_array[i]->efficiency = be32_to_cpup(p); | |
303 | ||
304 | /* stateid */ | |
305 | rc = decode_stateid(&stream, &fls->mirror_array[i]->stateid); | |
306 | if (rc) | |
307 | goto out_err_free; | |
308 | ||
309 | /* fh */ | |
310 | p = xdr_inline_decode(&stream, 4); | |
311 | if (!p) | |
312 | goto out_err_free; | |
313 | fh_count = be32_to_cpup(p); | |
314 | ||
315 | fls->mirror_array[i]->fh_versions = | |
316 | kzalloc(fh_count * sizeof(struct nfs_fh), | |
317 | gfp_flags); | |
318 | if (fls->mirror_array[i]->fh_versions == NULL) { | |
319 | rc = -ENOMEM; | |
320 | goto out_err_free; | |
321 | } | |
322 | ||
323 | for (j = 0; j < fh_count; j++) { | |
324 | rc = decode_nfs_fh(&stream, | |
325 | &fls->mirror_array[i]->fh_versions[j]); | |
326 | if (rc) | |
327 | goto out_err_free; | |
328 | } | |
329 | ||
330 | fls->mirror_array[i]->fh_versions_cnt = fh_count; | |
331 | ||
332 | /* user */ | |
333 | rc = decode_name(&stream, &fls->mirror_array[i]->uid); | |
334 | if (rc) | |
335 | goto out_err_free; | |
336 | ||
337 | /* group */ | |
338 | rc = decode_name(&stream, &fls->mirror_array[i]->gid); | |
339 | if (rc) | |
340 | goto out_err_free; | |
341 | ||
342 | dprintk("%s: uid %d gid %d\n", __func__, | |
343 | fls->mirror_array[i]->uid, | |
344 | fls->mirror_array[i]->gid); | |
345 | } | |
346 | ||
347 | ff_layout_sort_mirrors(fls); | |
348 | rc = ff_layout_check_layout(lgr); | |
349 | if (rc) | |
350 | goto out_err_free; | |
351 | ||
352 | ret = &fls->generic_hdr; | |
353 | dprintk("<-- %s (success)\n", __func__); | |
354 | out_free_page: | |
355 | __free_page(scratch); | |
356 | return ret; | |
357 | out_err_free: | |
358 | _ff_layout_free_lseg(fls); | |
359 | ret = ERR_PTR(rc); | |
360 | dprintk("<-- %s (%d)\n", __func__, rc); | |
361 | goto out_free_page; | |
362 | } | |
363 | ||
364 | static bool ff_layout_has_rw_segments(struct pnfs_layout_hdr *layout) | |
365 | { | |
366 | struct pnfs_layout_segment *lseg; | |
367 | ||
368 | list_for_each_entry(lseg, &layout->plh_segs, pls_list) | |
369 | if (lseg->pls_range.iomode == IOMODE_RW) | |
370 | return true; | |
371 | ||
372 | return false; | |
373 | } | |
374 | ||
375 | static void | |
376 | ff_layout_free_lseg(struct pnfs_layout_segment *lseg) | |
377 | { | |
378 | struct nfs4_ff_layout_segment *fls = FF_LAYOUT_LSEG(lseg); | |
379 | int i; | |
380 | ||
381 | dprintk("--> %s\n", __func__); | |
382 | ||
383 | for (i = 0; i < fls->mirror_array_cnt; i++) { | |
384 | if (fls->mirror_array[i]) { | |
385 | nfs4_ff_layout_put_deviceid(fls->mirror_array[i]->mirror_ds); | |
386 | fls->mirror_array[i]->mirror_ds = NULL; | |
387 | if (fls->mirror_array[i]->cred) { | |
388 | put_rpccred(fls->mirror_array[i]->cred); | |
389 | fls->mirror_array[i]->cred = NULL; | |
390 | } | |
391 | } | |
392 | } | |
393 | ||
394 | if (lseg->pls_range.iomode == IOMODE_RW) { | |
395 | struct nfs4_flexfile_layout *ffl; | |
396 | struct inode *inode; | |
397 | ||
398 | ffl = FF_LAYOUT_FROM_HDR(lseg->pls_layout); | |
399 | inode = ffl->generic_hdr.plh_inode; | |
400 | spin_lock(&inode->i_lock); | |
401 | if (!ff_layout_has_rw_segments(lseg->pls_layout)) { | |
402 | ffl->commit_info.nbuckets = 0; | |
403 | kfree(ffl->commit_info.buckets); | |
404 | ffl->commit_info.buckets = NULL; | |
405 | } | |
406 | spin_unlock(&inode->i_lock); | |
407 | } | |
408 | _ff_layout_free_lseg(fls); | |
409 | } | |
410 | ||
411 | /* Return 1 until we have multiple lsegs support */ | |
412 | static int | |
413 | ff_layout_get_lseg_count(struct nfs4_ff_layout_segment *fls) | |
414 | { | |
415 | return 1; | |
416 | } | |
417 | ||
418 | static int | |
419 | ff_layout_alloc_commit_info(struct pnfs_layout_segment *lseg, | |
420 | struct nfs_commit_info *cinfo, | |
421 | gfp_t gfp_flags) | |
422 | { | |
423 | struct nfs4_ff_layout_segment *fls = FF_LAYOUT_LSEG(lseg); | |
424 | struct pnfs_commit_bucket *buckets; | |
425 | int size; | |
426 | ||
427 | if (cinfo->ds->nbuckets != 0) { | |
428 | /* This assumes there is only one RW lseg per file. | |
429 | * To support multiple lseg per file, we need to | |
430 | * change struct pnfs_commit_bucket to allow dynamic | |
431 | * increasing nbuckets. | |
432 | */ | |
433 | return 0; | |
434 | } | |
435 | ||
436 | size = ff_layout_get_lseg_count(fls) * FF_LAYOUT_MIRROR_COUNT(lseg); | |
437 | ||
438 | buckets = kcalloc(size, sizeof(struct pnfs_commit_bucket), | |
439 | gfp_flags); | |
440 | if (!buckets) | |
441 | return -ENOMEM; | |
442 | else { | |
443 | int i; | |
444 | ||
445 | spin_lock(cinfo->lock); | |
446 | if (cinfo->ds->nbuckets != 0) | |
447 | kfree(buckets); | |
448 | else { | |
449 | cinfo->ds->buckets = buckets; | |
450 | cinfo->ds->nbuckets = size; | |
451 | for (i = 0; i < size; i++) { | |
452 | INIT_LIST_HEAD(&buckets[i].written); | |
453 | INIT_LIST_HEAD(&buckets[i].committing); | |
454 | /* mark direct verifier as unset */ | |
455 | buckets[i].direct_verf.committed = | |
456 | NFS_INVALID_STABLE_HOW; | |
457 | } | |
458 | } | |
459 | spin_unlock(cinfo->lock); | |
460 | return 0; | |
461 | } | |
462 | } | |
463 | ||
464 | static struct nfs4_pnfs_ds * | |
465 | ff_layout_choose_best_ds_for_read(struct nfs_pageio_descriptor *pgio, | |
466 | int *best_idx) | |
467 | { | |
468 | struct nfs4_ff_layout_segment *fls; | |
469 | struct nfs4_pnfs_ds *ds; | |
470 | int idx; | |
471 | ||
472 | fls = FF_LAYOUT_LSEG(pgio->pg_lseg); | |
473 | /* mirrors are sorted by efficiency */ | |
474 | for (idx = 0; idx < fls->mirror_array_cnt; idx++) { | |
475 | ds = nfs4_ff_layout_prepare_ds(pgio->pg_lseg, idx, false); | |
476 | if (ds) { | |
477 | *best_idx = idx; | |
478 | return ds; | |
479 | } | |
480 | } | |
481 | ||
482 | return NULL; | |
483 | } | |
484 | ||
485 | static void | |
486 | ff_layout_pg_init_read(struct nfs_pageio_descriptor *pgio, | |
487 | struct nfs_page *req) | |
488 | { | |
489 | struct nfs_pgio_mirror *pgm; | |
490 | struct nfs4_ff_layout_mirror *mirror; | |
491 | struct nfs4_pnfs_ds *ds; | |
492 | int ds_idx; | |
493 | ||
494 | /* Use full layout for now */ | |
495 | if (!pgio->pg_lseg) | |
496 | pgio->pg_lseg = pnfs_update_layout(pgio->pg_inode, | |
497 | req->wb_context, | |
498 | 0, | |
499 | NFS4_MAX_UINT64, | |
500 | IOMODE_READ, | |
501 | GFP_KERNEL); | |
502 | /* If no lseg, fall back to read through mds */ | |
503 | if (pgio->pg_lseg == NULL) | |
504 | goto out_mds; | |
505 | ||
506 | ds = ff_layout_choose_best_ds_for_read(pgio, &ds_idx); | |
507 | if (!ds) | |
508 | goto out_mds; | |
509 | mirror = FF_LAYOUT_COMP(pgio->pg_lseg, ds_idx); | |
510 | ||
511 | pgio->pg_mirror_idx = ds_idx; | |
512 | ||
513 | /* read always uses only one mirror - idx 0 for pgio layer */ | |
514 | pgm = &pgio->pg_mirrors[0]; | |
515 | pgm->pg_bsize = mirror->mirror_ds->ds_versions[0].rsize; | |
516 | ||
517 | return; | |
518 | out_mds: | |
519 | pnfs_put_lseg(pgio->pg_lseg); | |
520 | pgio->pg_lseg = NULL; | |
521 | nfs_pageio_reset_read_mds(pgio); | |
522 | } | |
523 | ||
524 | static void | |
525 | ff_layout_pg_init_write(struct nfs_pageio_descriptor *pgio, | |
526 | struct nfs_page *req) | |
527 | { | |
528 | struct nfs4_ff_layout_mirror *mirror; | |
529 | struct nfs_pgio_mirror *pgm; | |
530 | struct nfs_commit_info cinfo; | |
531 | struct nfs4_pnfs_ds *ds; | |
532 | int i; | |
533 | int status; | |
534 | ||
535 | if (!pgio->pg_lseg) | |
536 | pgio->pg_lseg = pnfs_update_layout(pgio->pg_inode, | |
537 | req->wb_context, | |
538 | 0, | |
539 | NFS4_MAX_UINT64, | |
540 | IOMODE_RW, | |
541 | GFP_NOFS); | |
542 | /* If no lseg, fall back to write through mds */ | |
543 | if (pgio->pg_lseg == NULL) | |
544 | goto out_mds; | |
545 | ||
546 | nfs_init_cinfo(&cinfo, pgio->pg_inode, pgio->pg_dreq); | |
547 | status = ff_layout_alloc_commit_info(pgio->pg_lseg, &cinfo, GFP_NOFS); | |
548 | if (status < 0) | |
549 | goto out_mds; | |
550 | ||
551 | /* Use a direct mapping of ds_idx to pgio mirror_idx */ | |
552 | if (WARN_ON_ONCE(pgio->pg_mirror_count != | |
553 | FF_LAYOUT_MIRROR_COUNT(pgio->pg_lseg))) | |
554 | goto out_mds; | |
555 | ||
556 | for (i = 0; i < pgio->pg_mirror_count; i++) { | |
557 | ds = nfs4_ff_layout_prepare_ds(pgio->pg_lseg, i, true); | |
558 | if (!ds) | |
559 | goto out_mds; | |
560 | pgm = &pgio->pg_mirrors[i]; | |
561 | mirror = FF_LAYOUT_COMP(pgio->pg_lseg, i); | |
562 | pgm->pg_bsize = mirror->mirror_ds->ds_versions[0].wsize; | |
563 | } | |
564 | ||
565 | return; | |
566 | ||
567 | out_mds: | |
568 | pnfs_put_lseg(pgio->pg_lseg); | |
569 | pgio->pg_lseg = NULL; | |
570 | nfs_pageio_reset_write_mds(pgio); | |
571 | } | |
572 | ||
573 | static unsigned int | |
574 | ff_layout_pg_get_mirror_count_write(struct nfs_pageio_descriptor *pgio, | |
575 | struct nfs_page *req) | |
576 | { | |
577 | if (!pgio->pg_lseg) | |
578 | pgio->pg_lseg = pnfs_update_layout(pgio->pg_inode, | |
579 | req->wb_context, | |
580 | 0, | |
581 | NFS4_MAX_UINT64, | |
582 | IOMODE_RW, | |
583 | GFP_NOFS); | |
584 | if (pgio->pg_lseg) | |
585 | return FF_LAYOUT_MIRROR_COUNT(pgio->pg_lseg); | |
586 | ||
587 | /* no lseg means that pnfs is not in use, so no mirroring here */ | |
588 | pnfs_put_lseg(pgio->pg_lseg); | |
589 | pgio->pg_lseg = NULL; | |
590 | nfs_pageio_reset_write_mds(pgio); | |
591 | return 1; | |
592 | } | |
593 | ||
594 | static const struct nfs_pageio_ops ff_layout_pg_read_ops = { | |
595 | .pg_init = ff_layout_pg_init_read, | |
596 | .pg_test = pnfs_generic_pg_test, | |
597 | .pg_doio = pnfs_generic_pg_readpages, | |
598 | .pg_cleanup = pnfs_generic_pg_cleanup, | |
599 | }; | |
600 | ||
601 | static const struct nfs_pageio_ops ff_layout_pg_write_ops = { | |
602 | .pg_init = ff_layout_pg_init_write, | |
603 | .pg_test = pnfs_generic_pg_test, | |
604 | .pg_doio = pnfs_generic_pg_writepages, | |
605 | .pg_get_mirror_count = ff_layout_pg_get_mirror_count_write, | |
606 | .pg_cleanup = pnfs_generic_pg_cleanup, | |
607 | }; | |
608 | ||
609 | static void ff_layout_reset_write(struct nfs_pgio_header *hdr, bool retry_pnfs) | |
610 | { | |
611 | struct rpc_task *task = &hdr->task; | |
612 | ||
613 | pnfs_layoutcommit_inode(hdr->inode, false); | |
614 | ||
615 | if (retry_pnfs) { | |
616 | dprintk("%s Reset task %5u for i/o through pNFS " | |
617 | "(req %s/%llu, %u bytes @ offset %llu)\n", __func__, | |
618 | hdr->task.tk_pid, | |
619 | hdr->inode->i_sb->s_id, | |
620 | (unsigned long long)NFS_FILEID(hdr->inode), | |
621 | hdr->args.count, | |
622 | (unsigned long long)hdr->args.offset); | |
623 | ||
624 | if (!hdr->dreq) { | |
625 | struct nfs_open_context *ctx; | |
626 | ||
627 | ctx = nfs_list_entry(hdr->pages.next)->wb_context; | |
628 | set_bit(NFS_CONTEXT_RESEND_WRITES, &ctx->flags); | |
629 | hdr->completion_ops->error_cleanup(&hdr->pages); | |
630 | } else { | |
631 | nfs_direct_set_resched_writes(hdr->dreq); | |
632 | /* fake unstable write to let common nfs resend pages */ | |
633 | hdr->verf.committed = NFS_UNSTABLE; | |
634 | hdr->good_bytes = 0; | |
635 | } | |
636 | return; | |
637 | } | |
638 | ||
639 | if (!test_and_set_bit(NFS_IOHDR_REDO, &hdr->flags)) { | |
640 | dprintk("%s Reset task %5u for i/o through MDS " | |
641 | "(req %s/%llu, %u bytes @ offset %llu)\n", __func__, | |
642 | hdr->task.tk_pid, | |
643 | hdr->inode->i_sb->s_id, | |
644 | (unsigned long long)NFS_FILEID(hdr->inode), | |
645 | hdr->args.count, | |
646 | (unsigned long long)hdr->args.offset); | |
647 | ||
648 | task->tk_status = pnfs_write_done_resend_to_mds(hdr); | |
649 | } | |
650 | } | |
651 | ||
652 | static void ff_layout_reset_read(struct nfs_pgio_header *hdr) | |
653 | { | |
654 | struct rpc_task *task = &hdr->task; | |
655 | ||
656 | pnfs_layoutcommit_inode(hdr->inode, false); | |
657 | ||
658 | if (!test_and_set_bit(NFS_IOHDR_REDO, &hdr->flags)) { | |
659 | dprintk("%s Reset task %5u for i/o through MDS " | |
660 | "(req %s/%llu, %u bytes @ offset %llu)\n", __func__, | |
661 | hdr->task.tk_pid, | |
662 | hdr->inode->i_sb->s_id, | |
663 | (unsigned long long)NFS_FILEID(hdr->inode), | |
664 | hdr->args.count, | |
665 | (unsigned long long)hdr->args.offset); | |
666 | ||
667 | task->tk_status = pnfs_read_done_resend_to_mds(hdr); | |
668 | } | |
669 | } | |
670 | ||
671 | static int ff_layout_async_handle_error_v4(struct rpc_task *task, | |
672 | struct nfs4_state *state, | |
673 | struct nfs_client *clp, | |
674 | struct pnfs_layout_segment *lseg, | |
675 | int idx) | |
676 | { | |
677 | struct pnfs_layout_hdr *lo = lseg->pls_layout; | |
678 | struct inode *inode = lo->plh_inode; | |
679 | struct nfs_server *mds_server = NFS_SERVER(inode); | |
680 | ||
681 | struct nfs4_deviceid_node *devid = FF_LAYOUT_DEVID_NODE(lseg, idx); | |
682 | struct nfs_client *mds_client = mds_server->nfs_client; | |
683 | struct nfs4_slot_table *tbl = &clp->cl_session->fc_slot_table; | |
684 | ||
685 | if (task->tk_status >= 0) | |
686 | return 0; | |
687 | ||
688 | switch (task->tk_status) { | |
689 | /* MDS state errors */ | |
690 | case -NFS4ERR_DELEG_REVOKED: | |
691 | case -NFS4ERR_ADMIN_REVOKED: | |
692 | case -NFS4ERR_BAD_STATEID: | |
693 | if (state == NULL) | |
694 | break; | |
695 | nfs_remove_bad_delegation(state->inode); | |
696 | case -NFS4ERR_OPENMODE: | |
697 | if (state == NULL) | |
698 | break; | |
699 | if (nfs4_schedule_stateid_recovery(mds_server, state) < 0) | |
700 | goto out_bad_stateid; | |
701 | goto wait_on_recovery; | |
702 | case -NFS4ERR_EXPIRED: | |
703 | if (state != NULL) { | |
704 | if (nfs4_schedule_stateid_recovery(mds_server, state) < 0) | |
705 | goto out_bad_stateid; | |
706 | } | |
707 | nfs4_schedule_lease_recovery(mds_client); | |
708 | goto wait_on_recovery; | |
709 | /* DS session errors */ | |
710 | case -NFS4ERR_BADSESSION: | |
711 | case -NFS4ERR_BADSLOT: | |
712 | case -NFS4ERR_BAD_HIGH_SLOT: | |
713 | case -NFS4ERR_DEADSESSION: | |
714 | case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: | |
715 | case -NFS4ERR_SEQ_FALSE_RETRY: | |
716 | case -NFS4ERR_SEQ_MISORDERED: | |
717 | dprintk("%s ERROR %d, Reset session. Exchangeid " | |
718 | "flags 0x%x\n", __func__, task->tk_status, | |
719 | clp->cl_exchange_flags); | |
720 | nfs4_schedule_session_recovery(clp->cl_session, task->tk_status); | |
721 | break; | |
722 | case -NFS4ERR_DELAY: | |
723 | case -NFS4ERR_GRACE: | |
724 | rpc_delay(task, FF_LAYOUT_POLL_RETRY_MAX); | |
725 | break; | |
726 | case -NFS4ERR_RETRY_UNCACHED_REP: | |
727 | break; | |
728 | /* Invalidate Layout errors */ | |
729 | case -NFS4ERR_PNFS_NO_LAYOUT: | |
730 | case -ESTALE: /* mapped NFS4ERR_STALE */ | |
731 | case -EBADHANDLE: /* mapped NFS4ERR_BADHANDLE */ | |
732 | case -EISDIR: /* mapped NFS4ERR_ISDIR */ | |
733 | case -NFS4ERR_FHEXPIRED: | |
734 | case -NFS4ERR_WRONG_TYPE: | |
735 | dprintk("%s Invalid layout error %d\n", __func__, | |
736 | task->tk_status); | |
737 | /* | |
738 | * Destroy layout so new i/o will get a new layout. | |
739 | * Layout will not be destroyed until all current lseg | |
740 | * references are put. Mark layout as invalid to resend failed | |
741 | * i/o and all i/o waiting on the slot table to the MDS until | |
742 | * layout is destroyed and a new valid layout is obtained. | |
743 | */ | |
744 | pnfs_destroy_layout(NFS_I(inode)); | |
745 | rpc_wake_up(&tbl->slot_tbl_waitq); | |
746 | goto reset; | |
747 | /* RPC connection errors */ | |
748 | case -ECONNREFUSED: | |
749 | case -EHOSTDOWN: | |
750 | case -EHOSTUNREACH: | |
751 | case -ENETUNREACH: | |
752 | case -EIO: | |
753 | case -ETIMEDOUT: | |
754 | case -EPIPE: | |
755 | dprintk("%s DS connection error %d\n", __func__, | |
756 | task->tk_status); | |
757 | nfs4_mark_deviceid_unavailable(devid); | |
758 | rpc_wake_up(&tbl->slot_tbl_waitq); | |
759 | /* fall through */ | |
760 | default: | |
761 | if (ff_layout_has_available_ds(lseg)) | |
762 | return -NFS4ERR_RESET_TO_PNFS; | |
763 | reset: | |
764 | dprintk("%s Retry through MDS. Error %d\n", __func__, | |
765 | task->tk_status); | |
766 | return -NFS4ERR_RESET_TO_MDS; | |
767 | } | |
768 | out: | |
769 | task->tk_status = 0; | |
770 | return -EAGAIN; | |
771 | out_bad_stateid: | |
772 | task->tk_status = -EIO; | |
773 | return 0; | |
774 | wait_on_recovery: | |
775 | rpc_sleep_on(&mds_client->cl_rpcwaitq, task, NULL); | |
776 | if (test_bit(NFS4CLNT_MANAGER_RUNNING, &mds_client->cl_state) == 0) | |
777 | rpc_wake_up_queued_task(&mds_client->cl_rpcwaitq, task); | |
778 | goto out; | |
779 | } | |
780 | ||
781 | /* Retry all errors through either pNFS or MDS except for -EJUKEBOX */ | |
782 | static int ff_layout_async_handle_error_v3(struct rpc_task *task, | |
783 | struct pnfs_layout_segment *lseg, | |
784 | int idx) | |
785 | { | |
786 | struct nfs4_deviceid_node *devid = FF_LAYOUT_DEVID_NODE(lseg, idx); | |
787 | ||
788 | if (task->tk_status >= 0) | |
789 | return 0; | |
790 | ||
791 | if (task->tk_status != -EJUKEBOX) { | |
792 | dprintk("%s DS connection error %d\n", __func__, | |
793 | task->tk_status); | |
794 | nfs4_mark_deviceid_unavailable(devid); | |
795 | if (ff_layout_has_available_ds(lseg)) | |
796 | return -NFS4ERR_RESET_TO_PNFS; | |
797 | else | |
798 | return -NFS4ERR_RESET_TO_MDS; | |
799 | } | |
800 | ||
801 | if (task->tk_status == -EJUKEBOX) | |
802 | nfs_inc_stats(lseg->pls_layout->plh_inode, NFSIOS_DELAY); | |
803 | task->tk_status = 0; | |
804 | rpc_restart_call(task); | |
805 | rpc_delay(task, NFS_JUKEBOX_RETRY_TIME); | |
806 | return -EAGAIN; | |
807 | } | |
808 | ||
809 | static int ff_layout_async_handle_error(struct rpc_task *task, | |
810 | struct nfs4_state *state, | |
811 | struct nfs_client *clp, | |
812 | struct pnfs_layout_segment *lseg, | |
813 | int idx) | |
814 | { | |
815 | int vers = clp->cl_nfs_mod->rpc_vers->number; | |
816 | ||
817 | switch (vers) { | |
818 | case 3: | |
819 | return ff_layout_async_handle_error_v3(task, lseg, idx); | |
820 | case 4: | |
821 | return ff_layout_async_handle_error_v4(task, state, clp, | |
822 | lseg, idx); | |
823 | default: | |
824 | /* should never happen */ | |
825 | WARN_ON_ONCE(1); | |
826 | return 0; | |
827 | } | |
828 | } | |
829 | ||
830 | static void ff_layout_io_track_ds_error(struct pnfs_layout_segment *lseg, | |
831 | int idx, u64 offset, u64 length, | |
832 | u32 status, int opnum) | |
833 | { | |
834 | struct nfs4_ff_layout_mirror *mirror; | |
835 | int err; | |
836 | ||
837 | mirror = FF_LAYOUT_COMP(lseg, idx); | |
838 | err = ff_layout_track_ds_error(FF_LAYOUT_FROM_HDR(lseg->pls_layout), | |
839 | mirror, offset, length, status, opnum, | |
840 | GFP_NOIO); | |
841 | dprintk("%s: err %d op %d status %u\n", __func__, err, opnum, status); | |
842 | } | |
843 | ||
844 | /* NFS_PROTO call done callback routines */ | |
845 | ||
846 | static int ff_layout_read_done_cb(struct rpc_task *task, | |
847 | struct nfs_pgio_header *hdr) | |
848 | { | |
849 | struct inode *inode; | |
850 | int err; | |
851 | ||
852 | trace_nfs4_pnfs_read(hdr, task->tk_status); | |
853 | if (task->tk_status == -ETIMEDOUT && !hdr->res.op_status) | |
854 | hdr->res.op_status = NFS4ERR_NXIO; | |
855 | if (task->tk_status < 0 && hdr->res.op_status) | |
856 | ff_layout_io_track_ds_error(hdr->lseg, hdr->pgio_mirror_idx, | |
857 | hdr->args.offset, hdr->args.count, | |
858 | hdr->res.op_status, OP_READ); | |
859 | err = ff_layout_async_handle_error(task, hdr->args.context->state, | |
860 | hdr->ds_clp, hdr->lseg, | |
861 | hdr->pgio_mirror_idx); | |
862 | ||
863 | switch (err) { | |
864 | case -NFS4ERR_RESET_TO_PNFS: | |
865 | set_bit(NFS_LAYOUT_RETURN_BEFORE_CLOSE, | |
866 | &hdr->lseg->pls_layout->plh_flags); | |
867 | pnfs_read_resend_pnfs(hdr); | |
868 | return task->tk_status; | |
869 | case -NFS4ERR_RESET_TO_MDS: | |
870 | inode = hdr->lseg->pls_layout->plh_inode; | |
871 | pnfs_error_mark_layout_for_return(inode, hdr->lseg); | |
872 | ff_layout_reset_read(hdr); | |
873 | return task->tk_status; | |
874 | case -EAGAIN: | |
875 | rpc_restart_call_prepare(task); | |
876 | return -EAGAIN; | |
877 | } | |
878 | ||
879 | return 0; | |
880 | } | |
881 | ||
882 | /* | |
883 | * We reference the rpc_cred of the first WRITE that triggers the need for | |
884 | * a LAYOUTCOMMIT, and use it to send the layoutcommit compound. | |
885 | * rfc5661 is not clear about which credential should be used. | |
886 | * | |
887 | * Flexlayout client should treat DS replied FILE_SYNC as DATA_SYNC, so | |
888 | * to follow http://www.rfc-editor.org/errata_search.php?rfc=5661&eid=2751 | |
889 | * we always send layoutcommit after DS writes. | |
890 | */ | |
891 | static void | |
892 | ff_layout_set_layoutcommit(struct nfs_pgio_header *hdr) | |
893 | { | |
67af7611 TM |
894 | pnfs_set_layoutcommit(hdr->inode, hdr->lseg, |
895 | hdr->mds_offset + hdr->res.count); | |
d67ae825 TH |
896 | dprintk("%s inode %lu pls_end_pos %lu\n", __func__, hdr->inode->i_ino, |
897 | (unsigned long) NFS_I(hdr->inode)->layout->plh_lwb); | |
898 | } | |
899 | ||
900 | static bool | |
901 | ff_layout_reset_to_mds(struct pnfs_layout_segment *lseg, int idx) | |
902 | { | |
903 | /* No mirroring for now */ | |
904 | struct nfs4_deviceid_node *node = FF_LAYOUT_DEVID_NODE(lseg, idx); | |
905 | ||
906 | return ff_layout_test_devid_unavailable(node); | |
907 | } | |
908 | ||
909 | static int ff_layout_read_prepare_common(struct rpc_task *task, | |
910 | struct nfs_pgio_header *hdr) | |
911 | { | |
912 | if (unlikely(test_bit(NFS_CONTEXT_BAD, &hdr->args.context->flags))) { | |
913 | rpc_exit(task, -EIO); | |
914 | return -EIO; | |
915 | } | |
916 | if (ff_layout_reset_to_mds(hdr->lseg, hdr->pgio_mirror_idx)) { | |
917 | dprintk("%s task %u reset io to MDS\n", __func__, task->tk_pid); | |
918 | if (ff_layout_has_available_ds(hdr->lseg)) | |
919 | pnfs_read_resend_pnfs(hdr); | |
920 | else | |
921 | ff_layout_reset_read(hdr); | |
922 | rpc_exit(task, 0); | |
923 | return -EAGAIN; | |
924 | } | |
925 | hdr->pgio_done_cb = ff_layout_read_done_cb; | |
926 | ||
927 | return 0; | |
928 | } | |
929 | ||
930 | /* | |
931 | * Call ops for the async read/write cases | |
932 | * In the case of dense layouts, the offset needs to be reset to its | |
933 | * original value. | |
934 | */ | |
935 | static void ff_layout_read_prepare_v3(struct rpc_task *task, void *data) | |
936 | { | |
937 | struct nfs_pgio_header *hdr = data; | |
938 | ||
939 | if (ff_layout_read_prepare_common(task, hdr)) | |
940 | return; | |
941 | ||
942 | rpc_call_start(task); | |
943 | } | |
944 | ||
945 | static int ff_layout_setup_sequence(struct nfs_client *ds_clp, | |
946 | struct nfs4_sequence_args *args, | |
947 | struct nfs4_sequence_res *res, | |
948 | struct rpc_task *task) | |
949 | { | |
950 | if (ds_clp->cl_session) | |
951 | return nfs41_setup_sequence(ds_clp->cl_session, | |
952 | args, | |
953 | res, | |
954 | task); | |
955 | return nfs40_setup_sequence(ds_clp->cl_slot_tbl, | |
956 | args, | |
957 | res, | |
958 | task); | |
959 | } | |
960 | ||
961 | static void ff_layout_read_prepare_v4(struct rpc_task *task, void *data) | |
962 | { | |
963 | struct nfs_pgio_header *hdr = data; | |
964 | ||
965 | if (ff_layout_read_prepare_common(task, hdr)) | |
966 | return; | |
967 | ||
968 | if (ff_layout_setup_sequence(hdr->ds_clp, | |
969 | &hdr->args.seq_args, | |
970 | &hdr->res.seq_res, | |
971 | task)) | |
972 | return; | |
973 | ||
974 | if (nfs4_set_rw_stateid(&hdr->args.stateid, hdr->args.context, | |
975 | hdr->args.lock_context, FMODE_READ) == -EIO) | |
976 | rpc_exit(task, -EIO); /* lost lock, terminate I/O */ | |
977 | } | |
978 | ||
979 | static void ff_layout_read_call_done(struct rpc_task *task, void *data) | |
980 | { | |
981 | struct nfs_pgio_header *hdr = data; | |
982 | ||
983 | dprintk("--> %s task->tk_status %d\n", __func__, task->tk_status); | |
984 | ||
985 | if (test_bit(NFS_IOHDR_REDO, &hdr->flags) && | |
986 | task->tk_status == 0) { | |
987 | nfs4_sequence_done(task, &hdr->res.seq_res); | |
988 | return; | |
989 | } | |
990 | ||
991 | /* Note this may cause RPC to be resent */ | |
992 | hdr->mds_ops->rpc_call_done(task, hdr); | |
993 | } | |
994 | ||
995 | static void ff_layout_read_count_stats(struct rpc_task *task, void *data) | |
996 | { | |
997 | struct nfs_pgio_header *hdr = data; | |
998 | ||
999 | rpc_count_iostats_metrics(task, | |
1000 | &NFS_CLIENT(hdr->inode)->cl_metrics[NFSPROC4_CLNT_READ]); | |
1001 | } | |
1002 | ||
1003 | static int ff_layout_write_done_cb(struct rpc_task *task, | |
1004 | struct nfs_pgio_header *hdr) | |
1005 | { | |
1006 | struct inode *inode; | |
1007 | int err; | |
1008 | ||
1009 | trace_nfs4_pnfs_write(hdr, task->tk_status); | |
1010 | if (task->tk_status == -ETIMEDOUT && !hdr->res.op_status) | |
1011 | hdr->res.op_status = NFS4ERR_NXIO; | |
1012 | if (task->tk_status < 0 && hdr->res.op_status) | |
1013 | ff_layout_io_track_ds_error(hdr->lseg, hdr->pgio_mirror_idx, | |
1014 | hdr->args.offset, hdr->args.count, | |
1015 | hdr->res.op_status, OP_WRITE); | |
1016 | err = ff_layout_async_handle_error(task, hdr->args.context->state, | |
1017 | hdr->ds_clp, hdr->lseg, | |
1018 | hdr->pgio_mirror_idx); | |
1019 | ||
1020 | switch (err) { | |
1021 | case -NFS4ERR_RESET_TO_PNFS: | |
1022 | case -NFS4ERR_RESET_TO_MDS: | |
1023 | inode = hdr->lseg->pls_layout->plh_inode; | |
1024 | pnfs_error_mark_layout_for_return(inode, hdr->lseg); | |
1025 | if (err == -NFS4ERR_RESET_TO_PNFS) { | |
1026 | pnfs_set_retry_layoutget(hdr->lseg->pls_layout); | |
1027 | ff_layout_reset_write(hdr, true); | |
1028 | } else { | |
1029 | pnfs_clear_retry_layoutget(hdr->lseg->pls_layout); | |
1030 | ff_layout_reset_write(hdr, false); | |
1031 | } | |
1032 | return task->tk_status; | |
1033 | case -EAGAIN: | |
1034 | rpc_restart_call_prepare(task); | |
1035 | return -EAGAIN; | |
1036 | } | |
1037 | ||
1038 | if (hdr->res.verf->committed == NFS_FILE_SYNC || | |
1039 | hdr->res.verf->committed == NFS_DATA_SYNC) | |
1040 | ff_layout_set_layoutcommit(hdr); | |
1041 | ||
1042 | return 0; | |
1043 | } | |
1044 | ||
1045 | static int ff_layout_commit_done_cb(struct rpc_task *task, | |
1046 | struct nfs_commit_data *data) | |
1047 | { | |
1048 | struct inode *inode; | |
1049 | int err; | |
1050 | ||
1051 | trace_nfs4_pnfs_commit_ds(data, task->tk_status); | |
1052 | if (task->tk_status == -ETIMEDOUT && !data->res.op_status) | |
1053 | data->res.op_status = NFS4ERR_NXIO; | |
1054 | if (task->tk_status < 0 && data->res.op_status) | |
1055 | ff_layout_io_track_ds_error(data->lseg, data->ds_commit_index, | |
1056 | data->args.offset, data->args.count, | |
1057 | data->res.op_status, OP_COMMIT); | |
1058 | err = ff_layout_async_handle_error(task, NULL, data->ds_clp, | |
1059 | data->lseg, data->ds_commit_index); | |
1060 | ||
1061 | switch (err) { | |
1062 | case -NFS4ERR_RESET_TO_PNFS: | |
1063 | case -NFS4ERR_RESET_TO_MDS: | |
1064 | inode = data->lseg->pls_layout->plh_inode; | |
1065 | pnfs_error_mark_layout_for_return(inode, data->lseg); | |
1066 | if (err == -NFS4ERR_RESET_TO_PNFS) | |
1067 | pnfs_set_retry_layoutget(data->lseg->pls_layout); | |
1068 | else | |
1069 | pnfs_clear_retry_layoutget(data->lseg->pls_layout); | |
1070 | pnfs_generic_prepare_to_resend_writes(data); | |
1071 | return -EAGAIN; | |
1072 | case -EAGAIN: | |
1073 | rpc_restart_call_prepare(task); | |
1074 | return -EAGAIN; | |
1075 | } | |
1076 | ||
1077 | if (data->verf.committed == NFS_UNSTABLE) | |
67af7611 | 1078 | pnfs_set_layoutcommit(data->inode, data->lseg, data->lwb); |
d67ae825 TH |
1079 | |
1080 | return 0; | |
1081 | } | |
1082 | ||
1083 | static int ff_layout_write_prepare_common(struct rpc_task *task, | |
1084 | struct nfs_pgio_header *hdr) | |
1085 | { | |
1086 | if (unlikely(test_bit(NFS_CONTEXT_BAD, &hdr->args.context->flags))) { | |
1087 | rpc_exit(task, -EIO); | |
1088 | return -EIO; | |
1089 | } | |
1090 | ||
1091 | if (ff_layout_reset_to_mds(hdr->lseg, hdr->pgio_mirror_idx)) { | |
1092 | bool retry_pnfs; | |
1093 | ||
1094 | retry_pnfs = ff_layout_has_available_ds(hdr->lseg); | |
1095 | dprintk("%s task %u reset io to %s\n", __func__, | |
1096 | task->tk_pid, retry_pnfs ? "pNFS" : "MDS"); | |
1097 | ff_layout_reset_write(hdr, retry_pnfs); | |
1098 | rpc_exit(task, 0); | |
1099 | return -EAGAIN; | |
1100 | } | |
1101 | ||
1102 | return 0; | |
1103 | } | |
1104 | ||
1105 | static void ff_layout_write_prepare_v3(struct rpc_task *task, void *data) | |
1106 | { | |
1107 | struct nfs_pgio_header *hdr = data; | |
1108 | ||
1109 | if (ff_layout_write_prepare_common(task, hdr)) | |
1110 | return; | |
1111 | ||
1112 | rpc_call_start(task); | |
1113 | } | |
1114 | ||
1115 | static void ff_layout_write_prepare_v4(struct rpc_task *task, void *data) | |
1116 | { | |
1117 | struct nfs_pgio_header *hdr = data; | |
1118 | ||
1119 | if (ff_layout_write_prepare_common(task, hdr)) | |
1120 | return; | |
1121 | ||
1122 | if (ff_layout_setup_sequence(hdr->ds_clp, | |
1123 | &hdr->args.seq_args, | |
1124 | &hdr->res.seq_res, | |
1125 | task)) | |
1126 | return; | |
1127 | ||
1128 | if (nfs4_set_rw_stateid(&hdr->args.stateid, hdr->args.context, | |
1129 | hdr->args.lock_context, FMODE_WRITE) == -EIO) | |
1130 | rpc_exit(task, -EIO); /* lost lock, terminate I/O */ | |
1131 | } | |
1132 | ||
1133 | static void ff_layout_write_call_done(struct rpc_task *task, void *data) | |
1134 | { | |
1135 | struct nfs_pgio_header *hdr = data; | |
1136 | ||
1137 | if (test_bit(NFS_IOHDR_REDO, &hdr->flags) && | |
1138 | task->tk_status == 0) { | |
1139 | nfs4_sequence_done(task, &hdr->res.seq_res); | |
1140 | return; | |
1141 | } | |
1142 | ||
1143 | /* Note this may cause RPC to be resent */ | |
1144 | hdr->mds_ops->rpc_call_done(task, hdr); | |
1145 | } | |
1146 | ||
1147 | static void ff_layout_write_count_stats(struct rpc_task *task, void *data) | |
1148 | { | |
1149 | struct nfs_pgio_header *hdr = data; | |
1150 | ||
1151 | rpc_count_iostats_metrics(task, | |
1152 | &NFS_CLIENT(hdr->inode)->cl_metrics[NFSPROC4_CLNT_WRITE]); | |
1153 | } | |
1154 | ||
1155 | static void ff_layout_commit_prepare_v3(struct rpc_task *task, void *data) | |
1156 | { | |
1157 | rpc_call_start(task); | |
1158 | } | |
1159 | ||
1160 | static void ff_layout_commit_prepare_v4(struct rpc_task *task, void *data) | |
1161 | { | |
1162 | struct nfs_commit_data *wdata = data; | |
1163 | ||
1164 | ff_layout_setup_sequence(wdata->ds_clp, | |
1165 | &wdata->args.seq_args, | |
1166 | &wdata->res.seq_res, | |
1167 | task); | |
1168 | } | |
1169 | ||
1170 | static void ff_layout_commit_count_stats(struct rpc_task *task, void *data) | |
1171 | { | |
1172 | struct nfs_commit_data *cdata = data; | |
1173 | ||
1174 | rpc_count_iostats_metrics(task, | |
1175 | &NFS_CLIENT(cdata->inode)->cl_metrics[NFSPROC4_CLNT_COMMIT]); | |
1176 | } | |
1177 | ||
1178 | static const struct rpc_call_ops ff_layout_read_call_ops_v3 = { | |
1179 | .rpc_call_prepare = ff_layout_read_prepare_v3, | |
1180 | .rpc_call_done = ff_layout_read_call_done, | |
1181 | .rpc_count_stats = ff_layout_read_count_stats, | |
1182 | .rpc_release = pnfs_generic_rw_release, | |
1183 | }; | |
1184 | ||
1185 | static const struct rpc_call_ops ff_layout_read_call_ops_v4 = { | |
1186 | .rpc_call_prepare = ff_layout_read_prepare_v4, | |
1187 | .rpc_call_done = ff_layout_read_call_done, | |
1188 | .rpc_count_stats = ff_layout_read_count_stats, | |
1189 | .rpc_release = pnfs_generic_rw_release, | |
1190 | }; | |
1191 | ||
1192 | static const struct rpc_call_ops ff_layout_write_call_ops_v3 = { | |
1193 | .rpc_call_prepare = ff_layout_write_prepare_v3, | |
1194 | .rpc_call_done = ff_layout_write_call_done, | |
1195 | .rpc_count_stats = ff_layout_write_count_stats, | |
1196 | .rpc_release = pnfs_generic_rw_release, | |
1197 | }; | |
1198 | ||
1199 | static const struct rpc_call_ops ff_layout_write_call_ops_v4 = { | |
1200 | .rpc_call_prepare = ff_layout_write_prepare_v4, | |
1201 | .rpc_call_done = ff_layout_write_call_done, | |
1202 | .rpc_count_stats = ff_layout_write_count_stats, | |
1203 | .rpc_release = pnfs_generic_rw_release, | |
1204 | }; | |
1205 | ||
1206 | static const struct rpc_call_ops ff_layout_commit_call_ops_v3 = { | |
1207 | .rpc_call_prepare = ff_layout_commit_prepare_v3, | |
1208 | .rpc_call_done = pnfs_generic_write_commit_done, | |
1209 | .rpc_count_stats = ff_layout_commit_count_stats, | |
1210 | .rpc_release = pnfs_generic_commit_release, | |
1211 | }; | |
1212 | ||
1213 | static const struct rpc_call_ops ff_layout_commit_call_ops_v4 = { | |
1214 | .rpc_call_prepare = ff_layout_commit_prepare_v4, | |
1215 | .rpc_call_done = pnfs_generic_write_commit_done, | |
1216 | .rpc_count_stats = ff_layout_commit_count_stats, | |
1217 | .rpc_release = pnfs_generic_commit_release, | |
1218 | }; | |
1219 | ||
1220 | static enum pnfs_try_status | |
1221 | ff_layout_read_pagelist(struct nfs_pgio_header *hdr) | |
1222 | { | |
1223 | struct pnfs_layout_segment *lseg = hdr->lseg; | |
1224 | struct nfs4_pnfs_ds *ds; | |
1225 | struct rpc_clnt *ds_clnt; | |
1226 | struct rpc_cred *ds_cred; | |
1227 | loff_t offset = hdr->args.offset; | |
1228 | u32 idx = hdr->pgio_mirror_idx; | |
1229 | int vers; | |
1230 | struct nfs_fh *fh; | |
1231 | ||
1232 | dprintk("--> %s ino %lu pgbase %u req %Zu@%llu\n", | |
1233 | __func__, hdr->inode->i_ino, | |
1234 | hdr->args.pgbase, (size_t)hdr->args.count, offset); | |
1235 | ||
1236 | ds = nfs4_ff_layout_prepare_ds(lseg, idx, false); | |
1237 | if (!ds) | |
1238 | goto out_failed; | |
1239 | ||
1240 | ds_clnt = nfs4_ff_find_or_create_ds_client(lseg, idx, ds->ds_clp, | |
1241 | hdr->inode); | |
1242 | if (IS_ERR(ds_clnt)) | |
1243 | goto out_failed; | |
1244 | ||
1245 | ds_cred = ff_layout_get_ds_cred(lseg, idx, hdr->cred); | |
1246 | if (IS_ERR(ds_cred)) | |
1247 | goto out_failed; | |
1248 | ||
1249 | vers = nfs4_ff_layout_ds_version(lseg, idx); | |
1250 | ||
1251 | dprintk("%s USE DS: %s cl_count %d vers %d\n", __func__, | |
1252 | ds->ds_remotestr, atomic_read(&ds->ds_clp->cl_count), vers); | |
1253 | ||
1254 | atomic_inc(&ds->ds_clp->cl_count); | |
1255 | hdr->ds_clp = ds->ds_clp; | |
1256 | fh = nfs4_ff_layout_select_ds_fh(lseg, idx); | |
1257 | if (fh) | |
1258 | hdr->args.fh = fh; | |
1259 | ||
1260 | /* | |
1261 | * Note that if we ever decide to split across DSes, | |
1262 | * then we may need to handle dense-like offsets. | |
1263 | */ | |
1264 | hdr->args.offset = offset; | |
1265 | hdr->mds_offset = offset; | |
1266 | ||
1267 | /* Perform an asynchronous read to ds */ | |
1268 | nfs_initiate_pgio(ds_clnt, hdr, ds_cred, ds->ds_clp->rpc_ops, | |
1269 | vers == 3 ? &ff_layout_read_call_ops_v3 : | |
1270 | &ff_layout_read_call_ops_v4, | |
1271 | 0, RPC_TASK_SOFTCONN); | |
1272 | ||
1273 | return PNFS_ATTEMPTED; | |
1274 | ||
1275 | out_failed: | |
1276 | if (ff_layout_has_available_ds(lseg)) | |
1277 | return PNFS_TRY_AGAIN; | |
1278 | return PNFS_NOT_ATTEMPTED; | |
1279 | } | |
1280 | ||
1281 | /* Perform async writes. */ | |
1282 | static enum pnfs_try_status | |
1283 | ff_layout_write_pagelist(struct nfs_pgio_header *hdr, int sync) | |
1284 | { | |
1285 | struct pnfs_layout_segment *lseg = hdr->lseg; | |
1286 | struct nfs4_pnfs_ds *ds; | |
1287 | struct rpc_clnt *ds_clnt; | |
1288 | struct rpc_cred *ds_cred; | |
1289 | loff_t offset = hdr->args.offset; | |
1290 | int vers; | |
1291 | struct nfs_fh *fh; | |
1292 | int idx = hdr->pgio_mirror_idx; | |
1293 | ||
1294 | ds = nfs4_ff_layout_prepare_ds(lseg, idx, true); | |
1295 | if (!ds) | |
1296 | return PNFS_NOT_ATTEMPTED; | |
1297 | ||
1298 | ds_clnt = nfs4_ff_find_or_create_ds_client(lseg, idx, ds->ds_clp, | |
1299 | hdr->inode); | |
1300 | if (IS_ERR(ds_clnt)) | |
1301 | return PNFS_NOT_ATTEMPTED; | |
1302 | ||
1303 | ds_cred = ff_layout_get_ds_cred(lseg, idx, hdr->cred); | |
1304 | if (IS_ERR(ds_cred)) | |
1305 | return PNFS_NOT_ATTEMPTED; | |
1306 | ||
1307 | vers = nfs4_ff_layout_ds_version(lseg, idx); | |
1308 | ||
1309 | dprintk("%s ino %lu sync %d req %Zu@%llu DS: %s cl_count %d vers %d\n", | |
1310 | __func__, hdr->inode->i_ino, sync, (size_t) hdr->args.count, | |
1311 | offset, ds->ds_remotestr, atomic_read(&ds->ds_clp->cl_count), | |
1312 | vers); | |
1313 | ||
1314 | hdr->pgio_done_cb = ff_layout_write_done_cb; | |
1315 | atomic_inc(&ds->ds_clp->cl_count); | |
1316 | hdr->ds_clp = ds->ds_clp; | |
1317 | hdr->ds_commit_idx = idx; | |
1318 | fh = nfs4_ff_layout_select_ds_fh(lseg, idx); | |
1319 | if (fh) | |
1320 | hdr->args.fh = fh; | |
1321 | ||
1322 | /* | |
1323 | * Note that if we ever decide to split across DSes, | |
1324 | * then we may need to handle dense-like offsets. | |
1325 | */ | |
1326 | hdr->args.offset = offset; | |
1327 | ||
1328 | /* Perform an asynchronous write */ | |
1329 | nfs_initiate_pgio(ds_clnt, hdr, ds_cred, ds->ds_clp->rpc_ops, | |
1330 | vers == 3 ? &ff_layout_write_call_ops_v3 : | |
1331 | &ff_layout_write_call_ops_v4, | |
1332 | sync, RPC_TASK_SOFTCONN); | |
1333 | return PNFS_ATTEMPTED; | |
1334 | } | |
1335 | ||
d67ae825 TH |
1336 | static u32 calc_ds_index_from_commit(struct pnfs_layout_segment *lseg, u32 i) |
1337 | { | |
1338 | return i; | |
1339 | } | |
1340 | ||
1341 | static struct nfs_fh * | |
1342 | select_ds_fh_from_commit(struct pnfs_layout_segment *lseg, u32 i) | |
1343 | { | |
1344 | struct nfs4_ff_layout_segment *flseg = FF_LAYOUT_LSEG(lseg); | |
1345 | ||
1346 | /* FIXME: Assume that there is only one NFS version available | |
1347 | * for the DS. | |
1348 | */ | |
1349 | return &flseg->mirror_array[i]->fh_versions[0]; | |
1350 | } | |
1351 | ||
1352 | static int ff_layout_initiate_commit(struct nfs_commit_data *data, int how) | |
1353 | { | |
1354 | struct pnfs_layout_segment *lseg = data->lseg; | |
1355 | struct nfs4_pnfs_ds *ds; | |
1356 | struct rpc_clnt *ds_clnt; | |
1357 | struct rpc_cred *ds_cred; | |
1358 | u32 idx; | |
1359 | int vers; | |
1360 | struct nfs_fh *fh; | |
1361 | ||
1362 | idx = calc_ds_index_from_commit(lseg, data->ds_commit_index); | |
1363 | ds = nfs4_ff_layout_prepare_ds(lseg, idx, true); | |
1364 | if (!ds) | |
1365 | goto out_err; | |
1366 | ||
1367 | ds_clnt = nfs4_ff_find_or_create_ds_client(lseg, idx, ds->ds_clp, | |
1368 | data->inode); | |
1369 | if (IS_ERR(ds_clnt)) | |
1370 | goto out_err; | |
1371 | ||
1372 | ds_cred = ff_layout_get_ds_cred(lseg, idx, data->cred); | |
1373 | if (IS_ERR(ds_cred)) | |
1374 | goto out_err; | |
1375 | ||
1376 | vers = nfs4_ff_layout_ds_version(lseg, idx); | |
1377 | ||
1378 | dprintk("%s ino %lu, how %d cl_count %d vers %d\n", __func__, | |
1379 | data->inode->i_ino, how, atomic_read(&ds->ds_clp->cl_count), | |
1380 | vers); | |
1381 | data->commit_done_cb = ff_layout_commit_done_cb; | |
1382 | data->cred = ds_cred; | |
1383 | atomic_inc(&ds->ds_clp->cl_count); | |
1384 | data->ds_clp = ds->ds_clp; | |
1385 | fh = select_ds_fh_from_commit(lseg, data->ds_commit_index); | |
1386 | if (fh) | |
1387 | data->args.fh = fh; | |
1388 | return nfs_initiate_commit(ds_clnt, data, ds->ds_clp->rpc_ops, | |
1389 | vers == 3 ? &ff_layout_commit_call_ops_v3 : | |
1390 | &ff_layout_commit_call_ops_v4, | |
1391 | how, RPC_TASK_SOFTCONN); | |
1392 | out_err: | |
1393 | pnfs_generic_prepare_to_resend_writes(data); | |
1394 | pnfs_generic_commit_release(data); | |
1395 | return -EAGAIN; | |
1396 | } | |
1397 | ||
1398 | static int | |
1399 | ff_layout_commit_pagelist(struct inode *inode, struct list_head *mds_pages, | |
1400 | int how, struct nfs_commit_info *cinfo) | |
1401 | { | |
1402 | return pnfs_generic_commit_pagelist(inode, mds_pages, how, cinfo, | |
1403 | ff_layout_initiate_commit); | |
1404 | } | |
1405 | ||
1406 | static struct pnfs_ds_commit_info * | |
1407 | ff_layout_get_ds_info(struct inode *inode) | |
1408 | { | |
1409 | struct pnfs_layout_hdr *layout = NFS_I(inode)->layout; | |
1410 | ||
1411 | if (layout == NULL) | |
1412 | return NULL; | |
1413 | ||
1414 | return &FF_LAYOUT_FROM_HDR(layout)->commit_info; | |
1415 | } | |
1416 | ||
1417 | static void | |
fc87701b | 1418 | ff_layout_free_deviceid_node(struct nfs4_deviceid_node *d) |
d67ae825 TH |
1419 | { |
1420 | nfs4_ff_layout_free_deviceid(container_of(d, struct nfs4_ff_layout_ds, | |
1421 | id_node)); | |
1422 | } | |
1423 | ||
1424 | static int ff_layout_encode_ioerr(struct nfs4_flexfile_layout *flo, | |
1425 | struct xdr_stream *xdr, | |
1426 | const struct nfs4_layoutreturn_args *args) | |
1427 | { | |
1428 | struct pnfs_layout_hdr *hdr = &flo->generic_hdr; | |
1429 | __be32 *start; | |
1430 | int count = 0, ret = 0; | |
1431 | ||
1432 | start = xdr_reserve_space(xdr, 4); | |
1433 | if (unlikely(!start)) | |
1434 | return -E2BIG; | |
1435 | ||
1436 | /* This assume we always return _ALL_ layouts */ | |
1437 | spin_lock(&hdr->plh_inode->i_lock); | |
1438 | ret = ff_layout_encode_ds_ioerr(flo, xdr, &count, &args->range); | |
1439 | spin_unlock(&hdr->plh_inode->i_lock); | |
1440 | ||
1441 | *start = cpu_to_be32(count); | |
1442 | ||
1443 | return ret; | |
1444 | } | |
1445 | ||
1446 | /* report nothing for now */ | |
1447 | static void ff_layout_encode_iostats(struct nfs4_flexfile_layout *flo, | |
1448 | struct xdr_stream *xdr, | |
1449 | const struct nfs4_layoutreturn_args *args) | |
1450 | { | |
1451 | __be32 *p; | |
1452 | ||
1453 | p = xdr_reserve_space(xdr, 4); | |
1454 | if (likely(p)) | |
1455 | *p = cpu_to_be32(0); | |
1456 | } | |
1457 | ||
1458 | static struct nfs4_deviceid_node * | |
1459 | ff_layout_alloc_deviceid_node(struct nfs_server *server, | |
1460 | struct pnfs_device *pdev, gfp_t gfp_flags) | |
1461 | { | |
1462 | struct nfs4_ff_layout_ds *dsaddr; | |
1463 | ||
1464 | dsaddr = nfs4_ff_alloc_deviceid_node(server, pdev, gfp_flags); | |
1465 | if (!dsaddr) | |
1466 | return NULL; | |
1467 | return &dsaddr->id_node; | |
1468 | } | |
1469 | ||
1470 | static void | |
1471 | ff_layout_encode_layoutreturn(struct pnfs_layout_hdr *lo, | |
1472 | struct xdr_stream *xdr, | |
1473 | const struct nfs4_layoutreturn_args *args) | |
1474 | { | |
1475 | struct nfs4_flexfile_layout *flo = FF_LAYOUT_FROM_HDR(lo); | |
1476 | __be32 *start; | |
1477 | ||
1478 | dprintk("%s: Begin\n", __func__); | |
1479 | start = xdr_reserve_space(xdr, 4); | |
1480 | BUG_ON(!start); | |
1481 | ||
1482 | if (ff_layout_encode_ioerr(flo, xdr, args)) | |
1483 | goto out; | |
1484 | ||
1485 | ff_layout_encode_iostats(flo, xdr, args); | |
1486 | out: | |
1487 | *start = cpu_to_be32((xdr->p - start - 1) * 4); | |
1488 | dprintk("%s: Return\n", __func__); | |
1489 | } | |
1490 | ||
1491 | static struct pnfs_layoutdriver_type flexfilelayout_type = { | |
1492 | .id = LAYOUT_FLEX_FILES, | |
1493 | .name = "LAYOUT_FLEX_FILES", | |
1494 | .owner = THIS_MODULE, | |
1495 | .alloc_layout_hdr = ff_layout_alloc_layout_hdr, | |
1496 | .free_layout_hdr = ff_layout_free_layout_hdr, | |
1497 | .alloc_lseg = ff_layout_alloc_lseg, | |
1498 | .free_lseg = ff_layout_free_lseg, | |
1499 | .pg_read_ops = &ff_layout_pg_read_ops, | |
1500 | .pg_write_ops = &ff_layout_pg_write_ops, | |
1501 | .get_ds_info = ff_layout_get_ds_info, | |
fc87701b | 1502 | .free_deviceid_node = ff_layout_free_deviceid_node, |
338d00cf | 1503 | .mark_request_commit = pnfs_layout_mark_request_commit, |
d67ae825 TH |
1504 | .clear_request_commit = pnfs_generic_clear_request_commit, |
1505 | .scan_commit_lists = pnfs_generic_scan_commit_lists, | |
1506 | .recover_commit_reqs = pnfs_generic_recover_commit_reqs, | |
1507 | .commit_pagelist = ff_layout_commit_pagelist, | |
1508 | .read_pagelist = ff_layout_read_pagelist, | |
1509 | .write_pagelist = ff_layout_write_pagelist, | |
1510 | .alloc_deviceid_node = ff_layout_alloc_deviceid_node, | |
1511 | .encode_layoutreturn = ff_layout_encode_layoutreturn, | |
1512 | }; | |
1513 | ||
1514 | static int __init nfs4flexfilelayout_init(void) | |
1515 | { | |
1516 | printk(KERN_INFO "%s: NFSv4 Flexfile Layout Driver Registering...\n", | |
1517 | __func__); | |
1518 | return pnfs_register_layoutdriver(&flexfilelayout_type); | |
1519 | } | |
1520 | ||
1521 | static void __exit nfs4flexfilelayout_exit(void) | |
1522 | { | |
1523 | printk(KERN_INFO "%s: NFSv4 Flexfile Layout Driver Unregistering...\n", | |
1524 | __func__); | |
1525 | pnfs_unregister_layoutdriver(&flexfilelayout_type); | |
1526 | } | |
1527 | ||
1528 | MODULE_ALIAS("nfs-layouttype4-4"); | |
1529 | ||
1530 | MODULE_LICENSE("GPL"); | |
1531 | MODULE_DESCRIPTION("The NFSv4 flexfile layout driver"); | |
1532 | ||
1533 | module_init(nfs4flexfilelayout_init); | |
1534 | module_exit(nfs4flexfilelayout_exit); |