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10#include <linux/nfs_fs.h>
11#include <linux/nfs_mount.h>
12#include <linux/nfs_page.h>
13#include <linux/module.h>
14#include <linux/sched/mm.h>
15
16#include <linux/sunrpc/metrics.h>
17
18#include "flexfilelayout.h"
19#include "../nfs4session.h"
20#include "../nfs4idmap.h"
21#include "../internal.h"
22#include "../delegation.h"
23#include "../nfs4trace.h"
24#include "../iostat.h"
25#include "../nfs.h"
26#include "../nfs42.h"
27
28#define NFSDBG_FACILITY NFSDBG_PNFS_LD
29
30#define FF_LAYOUT_POLL_RETRY_MAX (15*HZ)
31#define FF_LAYOUTRETURN_MAXERR 20
32
33static unsigned short io_maxretrans;
34
35static const struct pnfs_commit_ops ff_layout_commit_ops;
36static void ff_layout_read_record_layoutstats_done(struct rpc_task *task,
37 struct nfs_pgio_header *hdr);
38static int ff_layout_mirror_prepare_stats(struct pnfs_layout_hdr *lo,
39 struct nfs42_layoutstat_devinfo *devinfo,
40 int dev_limit);
41static void ff_layout_encode_ff_layoutupdate(struct xdr_stream *xdr,
42 const struct nfs42_layoutstat_devinfo *devinfo,
43 struct nfs4_ff_layout_mirror *mirror);
44
45static struct pnfs_layout_hdr *
46ff_layout_alloc_layout_hdr(struct inode *inode, gfp_t gfp_flags)
47{
48 struct nfs4_flexfile_layout *ffl;
49
50 ffl = kzalloc(sizeof(*ffl), gfp_flags);
51 if (ffl) {
52 pnfs_init_ds_commit_info(&ffl->commit_info);
53 INIT_LIST_HEAD(&ffl->error_list);
54 INIT_LIST_HEAD(&ffl->mirrors);
55 ffl->last_report_time = ktime_get();
56 ffl->commit_info.ops = &ff_layout_commit_ops;
57 return &ffl->generic_hdr;
58 } else
59 return NULL;
60}
61
62static void
63ff_layout_free_layout_hdr(struct pnfs_layout_hdr *lo)
64{
65 struct nfs4_flexfile_layout *ffl = FF_LAYOUT_FROM_HDR(lo);
66 struct nfs4_ff_layout_ds_err *err, *n;
67
68 list_for_each_entry_safe(err, n, &ffl->error_list, list) {
69 list_del(&err->list);
70 kfree(err);
71 }
72 kfree_rcu(ffl, generic_hdr.plh_rcu);
73}
74
75static int decode_pnfs_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
76{
77 __be32 *p;
78
79 p = xdr_inline_decode(xdr, NFS4_STATEID_SIZE);
80 if (unlikely(p == NULL))
81 return -ENOBUFS;
82 stateid->type = NFS4_PNFS_DS_STATEID_TYPE;
83 memcpy(stateid->data, p, NFS4_STATEID_SIZE);
84 dprintk("%s: stateid id= [%x%x%x%x]\n", __func__,
85 p[0], p[1], p[2], p[3]);
86 return 0;
87}
88
89static int decode_deviceid(struct xdr_stream *xdr, struct nfs4_deviceid *devid)
90{
91 __be32 *p;
92
93 p = xdr_inline_decode(xdr, NFS4_DEVICEID4_SIZE);
94 if (unlikely(!p))
95 return -ENOBUFS;
96 memcpy(devid, p, NFS4_DEVICEID4_SIZE);
97 nfs4_print_deviceid(devid);
98 return 0;
99}
100
101static int decode_nfs_fh(struct xdr_stream *xdr, struct nfs_fh *fh)
102{
103 __be32 *p;
104
105 p = xdr_inline_decode(xdr, 4);
106 if (unlikely(!p))
107 return -ENOBUFS;
108 fh->size = be32_to_cpup(p++);
109 if (fh->size > NFS_MAXFHSIZE) {
110 printk(KERN_ERR "NFS flexfiles: Too big fh received %d\n",
111 fh->size);
112 return -EOVERFLOW;
113 }
114
115 p = xdr_inline_decode(xdr, fh->size);
116 if (unlikely(!p))
117 return -ENOBUFS;
118 memcpy(&fh->data, p, fh->size);
119 dprintk("%s: fh len %d\n", __func__, fh->size);
120
121 return 0;
122}
123
124
125
126
127
128
129
130
131
132static int
133decode_name(struct xdr_stream *xdr, u32 *id)
134{
135 __be32 *p;
136 int len;
137
138
139 p = xdr_inline_decode(xdr, 4);
140 if (unlikely(!p))
141 return -ENOBUFS;
142 len = be32_to_cpup(p++);
143 if (len < 0)
144 return -EINVAL;
145
146 dprintk("%s: len %u\n", __func__, len);
147
148
149 p = xdr_inline_decode(xdr, len);
150 if (unlikely(!p))
151 return -ENOBUFS;
152
153 if (!nfs_map_string_to_numeric((char *)p, len, id))
154 return -EINVAL;
155
156 return 0;
157}
158
159static bool ff_mirror_match_fh(const struct nfs4_ff_layout_mirror *m1,
160 const struct nfs4_ff_layout_mirror *m2)
161{
162 int i, j;
163
164 if (m1->fh_versions_cnt != m2->fh_versions_cnt)
165 return false;
166 for (i = 0; i < m1->fh_versions_cnt; i++) {
167 bool found_fh = false;
168 for (j = 0; j < m2->fh_versions_cnt; j++) {
169 if (nfs_compare_fh(&m1->fh_versions[i],
170 &m2->fh_versions[j]) == 0) {
171 found_fh = true;
172 break;
173 }
174 }
175 if (!found_fh)
176 return false;
177 }
178 return true;
179}
180
181static struct nfs4_ff_layout_mirror *
182ff_layout_add_mirror(struct pnfs_layout_hdr *lo,
183 struct nfs4_ff_layout_mirror *mirror)
184{
185 struct nfs4_flexfile_layout *ff_layout = FF_LAYOUT_FROM_HDR(lo);
186 struct nfs4_ff_layout_mirror *pos;
187 struct inode *inode = lo->plh_inode;
188
189 spin_lock(&inode->i_lock);
190 list_for_each_entry(pos, &ff_layout->mirrors, mirrors) {
191 if (memcmp(&mirror->devid, &pos->devid, sizeof(pos->devid)) != 0)
192 continue;
193 if (!ff_mirror_match_fh(mirror, pos))
194 continue;
195 if (refcount_inc_not_zero(&pos->ref)) {
196 spin_unlock(&inode->i_lock);
197 return pos;
198 }
199 }
200 list_add(&mirror->mirrors, &ff_layout->mirrors);
201 mirror->layout = lo;
202 spin_unlock(&inode->i_lock);
203 return mirror;
204}
205
206static void
207ff_layout_remove_mirror(struct nfs4_ff_layout_mirror *mirror)
208{
209 struct inode *inode;
210 if (mirror->layout == NULL)
211 return;
212 inode = mirror->layout->plh_inode;
213 spin_lock(&inode->i_lock);
214 list_del(&mirror->mirrors);
215 spin_unlock(&inode->i_lock);
216 mirror->layout = NULL;
217}
218
219static struct nfs4_ff_layout_mirror *ff_layout_alloc_mirror(gfp_t gfp_flags)
220{
221 struct nfs4_ff_layout_mirror *mirror;
222
223 mirror = kzalloc(sizeof(*mirror), gfp_flags);
224 if (mirror != NULL) {
225 spin_lock_init(&mirror->lock);
226 refcount_set(&mirror->ref, 1);
227 INIT_LIST_HEAD(&mirror->mirrors);
228 }
229 return mirror;
230}
231
232static void ff_layout_free_mirror(struct nfs4_ff_layout_mirror *mirror)
233{
234 const struct cred *cred;
235
236 ff_layout_remove_mirror(mirror);
237 kfree(mirror->fh_versions);
238 cred = rcu_access_pointer(mirror->ro_cred);
239 put_cred(cred);
240 cred = rcu_access_pointer(mirror->rw_cred);
241 put_cred(cred);
242 nfs4_ff_layout_put_deviceid(mirror->mirror_ds);
243 kfree(mirror);
244}
245
246static void ff_layout_put_mirror(struct nfs4_ff_layout_mirror *mirror)
247{
248 if (mirror != NULL && refcount_dec_and_test(&mirror->ref))
249 ff_layout_free_mirror(mirror);
250}
251
252static void ff_layout_free_mirror_array(struct nfs4_ff_layout_segment *fls)
253{
254 u32 i;
255
256 for (i = 0; i < fls->mirror_array_cnt; i++)
257 ff_layout_put_mirror(fls->mirror_array[i]);
258}
259
260static 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
268static bool
269ff_lseg_match_mirrors(struct pnfs_layout_segment *l1,
270 struct pnfs_layout_segment *l2)
271{
272 const struct nfs4_ff_layout_segment *fl1 = FF_LAYOUT_LSEG(l1);
273 const struct nfs4_ff_layout_segment *fl2 = FF_LAYOUT_LSEG(l1);
274 u32 i;
275
276 if (fl1->mirror_array_cnt != fl2->mirror_array_cnt)
277 return false;
278 for (i = 0; i < fl1->mirror_array_cnt; i++) {
279 if (fl1->mirror_array[i] != fl2->mirror_array[i])
280 return false;
281 }
282 return true;
283}
284
285static bool
286ff_lseg_range_is_after(const struct pnfs_layout_range *l1,
287 const struct pnfs_layout_range *l2)
288{
289 u64 end1, end2;
290
291 if (l1->iomode != l2->iomode)
292 return l1->iomode != IOMODE_READ;
293 end1 = pnfs_calc_offset_end(l1->offset, l1->length);
294 end2 = pnfs_calc_offset_end(l2->offset, l2->length);
295 if (end1 < l2->offset)
296 return false;
297 if (end2 < l1->offset)
298 return true;
299 return l2->offset <= l1->offset;
300}
301
302static bool
303ff_lseg_merge(struct pnfs_layout_segment *new,
304 struct pnfs_layout_segment *old)
305{
306 u64 new_end, old_end;
307
308 if (test_bit(NFS_LSEG_LAYOUTRETURN, &old->pls_flags))
309 return false;
310 if (new->pls_range.iomode != old->pls_range.iomode)
311 return false;
312 old_end = pnfs_calc_offset_end(old->pls_range.offset,
313 old->pls_range.length);
314 if (old_end < new->pls_range.offset)
315 return false;
316 new_end = pnfs_calc_offset_end(new->pls_range.offset,
317 new->pls_range.length);
318 if (new_end < old->pls_range.offset)
319 return false;
320 if (!ff_lseg_match_mirrors(new, old))
321 return false;
322
323
324 if (new_end < old_end)
325 new_end = old_end;
326 if (new->pls_range.offset < old->pls_range.offset)
327 new->pls_range.offset = old->pls_range.offset;
328 new->pls_range.length = pnfs_calc_offset_length(new->pls_range.offset,
329 new_end);
330 if (test_bit(NFS_LSEG_ROC, &old->pls_flags))
331 set_bit(NFS_LSEG_ROC, &new->pls_flags);
332 return true;
333}
334
335static void
336ff_layout_add_lseg(struct pnfs_layout_hdr *lo,
337 struct pnfs_layout_segment *lseg,
338 struct list_head *free_me)
339{
340 pnfs_generic_layout_insert_lseg(lo, lseg,
341 ff_lseg_range_is_after,
342 ff_lseg_merge,
343 free_me);
344}
345
346static void ff_layout_sort_mirrors(struct nfs4_ff_layout_segment *fls)
347{
348 int i, j;
349
350 for (i = 0; i < fls->mirror_array_cnt - 1; i++) {
351 for (j = i + 1; j < fls->mirror_array_cnt; j++)
352 if (fls->mirror_array[i]->efficiency <
353 fls->mirror_array[j]->efficiency)
354 swap(fls->mirror_array[i],
355 fls->mirror_array[j]);
356 }
357}
358
359static struct pnfs_layout_segment *
360ff_layout_alloc_lseg(struct pnfs_layout_hdr *lh,
361 struct nfs4_layoutget_res *lgr,
362 gfp_t gfp_flags)
363{
364 struct pnfs_layout_segment *ret;
365 struct nfs4_ff_layout_segment *fls = NULL;
366 struct xdr_stream stream;
367 struct xdr_buf buf;
368 struct page *scratch;
369 u64 stripe_unit;
370 u32 mirror_array_cnt;
371 __be32 *p;
372 int i, rc;
373
374 dprintk("--> %s\n", __func__);
375 scratch = alloc_page(gfp_flags);
376 if (!scratch)
377 return ERR_PTR(-ENOMEM);
378
379 xdr_init_decode_pages(&stream, &buf, lgr->layoutp->pages,
380 lgr->layoutp->len);
381 xdr_set_scratch_page(&stream, scratch);
382
383
384 rc = -EIO;
385 p = xdr_inline_decode(&stream, 8 + 4);
386 if (!p)
387 goto out_err_free;
388
389 p = xdr_decode_hyper(p, &stripe_unit);
390 mirror_array_cnt = be32_to_cpup(p++);
391 dprintk("%s: stripe_unit=%llu mirror_array_cnt=%u\n", __func__,
392 stripe_unit, mirror_array_cnt);
393
394 if (mirror_array_cnt > NFS4_FLEXFILE_LAYOUT_MAX_MIRROR_CNT ||
395 mirror_array_cnt == 0)
396 goto out_err_free;
397
398 rc = -ENOMEM;
399 fls = kzalloc(struct_size(fls, mirror_array, mirror_array_cnt),
400 gfp_flags);
401 if (!fls)
402 goto out_err_free;
403
404 fls->mirror_array_cnt = mirror_array_cnt;
405 fls->stripe_unit = stripe_unit;
406
407 for (i = 0; i < fls->mirror_array_cnt; i++) {
408 struct nfs4_ff_layout_mirror *mirror;
409 struct cred *kcred;
410 const struct cred __rcu *cred;
411 kuid_t uid;
412 kgid_t gid;
413 u32 ds_count, fh_count, id;
414 int j;
415
416 rc = -EIO;
417 p = xdr_inline_decode(&stream, 4);
418 if (!p)
419 goto out_err_free;
420 ds_count = be32_to_cpup(p);
421
422
423 if (ds_count != 1)
424 goto out_err_free;
425
426 fls->mirror_array[i] = ff_layout_alloc_mirror(gfp_flags);
427 if (fls->mirror_array[i] == NULL) {
428 rc = -ENOMEM;
429 goto out_err_free;
430 }
431
432 fls->mirror_array[i]->ds_count = ds_count;
433
434
435 rc = decode_deviceid(&stream, &fls->mirror_array[i]->devid);
436 if (rc)
437 goto out_err_free;
438
439
440 rc = -EIO;
441 p = xdr_inline_decode(&stream, 4);
442 if (!p)
443 goto out_err_free;
444 fls->mirror_array[i]->efficiency = be32_to_cpup(p);
445
446
447 rc = decode_pnfs_stateid(&stream, &fls->mirror_array[i]->stateid);
448 if (rc)
449 goto out_err_free;
450
451
452 rc = -EIO;
453 p = xdr_inline_decode(&stream, 4);
454 if (!p)
455 goto out_err_free;
456 fh_count = be32_to_cpup(p);
457
458 fls->mirror_array[i]->fh_versions =
459 kcalloc(fh_count, sizeof(struct nfs_fh),
460 gfp_flags);
461 if (fls->mirror_array[i]->fh_versions == NULL) {
462 rc = -ENOMEM;
463 goto out_err_free;
464 }
465
466 for (j = 0; j < fh_count; j++) {
467 rc = decode_nfs_fh(&stream,
468 &fls->mirror_array[i]->fh_versions[j]);
469 if (rc)
470 goto out_err_free;
471 }
472
473 fls->mirror_array[i]->fh_versions_cnt = fh_count;
474
475
476 rc = decode_name(&stream, &id);
477 if (rc)
478 goto out_err_free;
479
480 uid = make_kuid(&init_user_ns, id);
481
482
483 rc = decode_name(&stream, &id);
484 if (rc)
485 goto out_err_free;
486
487 gid = make_kgid(&init_user_ns, id);
488
489 if (gfp_flags & __GFP_FS)
490 kcred = prepare_kernel_cred(NULL);
491 else {
492 unsigned int nofs_flags = memalloc_nofs_save();
493 kcred = prepare_kernel_cred(NULL);
494 memalloc_nofs_restore(nofs_flags);
495 }
496 rc = -ENOMEM;
497 if (!kcred)
498 goto out_err_free;
499 kcred->fsuid = uid;
500 kcred->fsgid = gid;
501 cred = RCU_INITIALIZER(kcred);
502
503 if (lgr->range.iomode == IOMODE_READ)
504 rcu_assign_pointer(fls->mirror_array[i]->ro_cred, cred);
505 else
506 rcu_assign_pointer(fls->mirror_array[i]->rw_cred, cred);
507
508 mirror = ff_layout_add_mirror(lh, fls->mirror_array[i]);
509 if (mirror != fls->mirror_array[i]) {
510
511 if (lgr->range.iomode == IOMODE_READ) {
512 cred = xchg(&mirror->ro_cred, cred);
513 rcu_assign_pointer(fls->mirror_array[i]->ro_cred, cred);
514 } else {
515 cred = xchg(&mirror->rw_cred, cred);
516 rcu_assign_pointer(fls->mirror_array[i]->rw_cred, cred);
517 }
518 ff_layout_free_mirror(fls->mirror_array[i]);
519 fls->mirror_array[i] = mirror;
520 }
521
522 dprintk("%s: iomode %s uid %u gid %u\n", __func__,
523 lgr->range.iomode == IOMODE_READ ? "READ" : "RW",
524 from_kuid(&init_user_ns, uid),
525 from_kgid(&init_user_ns, gid));
526 }
527
528 p = xdr_inline_decode(&stream, 4);
529 if (!p)
530 goto out_sort_mirrors;
531 fls->flags = be32_to_cpup(p);
532
533 p = xdr_inline_decode(&stream, 4);
534 if (!p)
535 goto out_sort_mirrors;
536 for (i=0; i < fls->mirror_array_cnt; i++)
537 fls->mirror_array[i]->report_interval = be32_to_cpup(p);
538
539out_sort_mirrors:
540 ff_layout_sort_mirrors(fls);
541 ret = &fls->generic_hdr;
542 dprintk("<-- %s (success)\n", __func__);
543out_free_page:
544 __free_page(scratch);
545 return ret;
546out_err_free:
547 _ff_layout_free_lseg(fls);
548 ret = ERR_PTR(rc);
549 dprintk("<-- %s (%d)\n", __func__, rc);
550 goto out_free_page;
551}
552
553static void
554ff_layout_free_lseg(struct pnfs_layout_segment *lseg)
555{
556 struct nfs4_ff_layout_segment *fls = FF_LAYOUT_LSEG(lseg);
557
558 dprintk("--> %s\n", __func__);
559
560 if (lseg->pls_range.iomode == IOMODE_RW) {
561 struct nfs4_flexfile_layout *ffl;
562 struct inode *inode;
563
564 ffl = FF_LAYOUT_FROM_HDR(lseg->pls_layout);
565 inode = ffl->generic_hdr.plh_inode;
566 spin_lock(&inode->i_lock);
567 pnfs_generic_ds_cinfo_release_lseg(&ffl->commit_info, lseg);
568 spin_unlock(&inode->i_lock);
569 }
570 _ff_layout_free_lseg(fls);
571}
572
573static void
574nfs4_ff_start_busy_timer(struct nfs4_ff_busy_timer *timer, ktime_t now)
575{
576
577 if (atomic_inc_return(&timer->n_ops) == 1) {
578 timer->start_time = now;
579 }
580}
581
582static ktime_t
583nfs4_ff_end_busy_timer(struct nfs4_ff_busy_timer *timer, ktime_t now)
584{
585 ktime_t start;
586
587 if (atomic_dec_return(&timer->n_ops) < 0)
588 WARN_ON_ONCE(1);
589
590 start = timer->start_time;
591 timer->start_time = now;
592 return ktime_sub(now, start);
593}
594
595static bool
596nfs4_ff_layoutstat_start_io(struct nfs4_ff_layout_mirror *mirror,
597 struct nfs4_ff_layoutstat *layoutstat,
598 ktime_t now)
599{
600 s64 report_interval = FF_LAYOUTSTATS_REPORT_INTERVAL;
601 struct nfs4_flexfile_layout *ffl = FF_LAYOUT_FROM_HDR(mirror->layout);
602
603 nfs4_ff_start_busy_timer(&layoutstat->busy_timer, now);
604 if (!mirror->start_time)
605 mirror->start_time = now;
606 if (mirror->report_interval != 0)
607 report_interval = (s64)mirror->report_interval * 1000LL;
608 else if (layoutstats_timer != 0)
609 report_interval = (s64)layoutstats_timer * 1000LL;
610 if (ktime_to_ms(ktime_sub(now, ffl->last_report_time)) >=
611 report_interval) {
612 ffl->last_report_time = now;
613 return true;
614 }
615
616 return false;
617}
618
619static void
620nfs4_ff_layout_stat_io_update_requested(struct nfs4_ff_layoutstat *layoutstat,
621 __u64 requested)
622{
623 struct nfs4_ff_io_stat *iostat = &layoutstat->io_stat;
624
625 iostat->ops_requested++;
626 iostat->bytes_requested += requested;
627}
628
629static void
630nfs4_ff_layout_stat_io_update_completed(struct nfs4_ff_layoutstat *layoutstat,
631 __u64 requested,
632 __u64 completed,
633 ktime_t time_completed,
634 ktime_t time_started)
635{
636 struct nfs4_ff_io_stat *iostat = &layoutstat->io_stat;
637 ktime_t completion_time = ktime_sub(time_completed, time_started);
638 ktime_t timer;
639
640 iostat->ops_completed++;
641 iostat->bytes_completed += completed;
642 iostat->bytes_not_delivered += requested - completed;
643
644 timer = nfs4_ff_end_busy_timer(&layoutstat->busy_timer, time_completed);
645 iostat->total_busy_time =
646 ktime_add(iostat->total_busy_time, timer);
647 iostat->aggregate_completion_time =
648 ktime_add(iostat->aggregate_completion_time,
649 completion_time);
650}
651
652static void
653nfs4_ff_layout_stat_io_start_read(struct inode *inode,
654 struct nfs4_ff_layout_mirror *mirror,
655 __u64 requested, ktime_t now)
656{
657 bool report;
658
659 spin_lock(&mirror->lock);
660 report = nfs4_ff_layoutstat_start_io(mirror, &mirror->read_stat, now);
661 nfs4_ff_layout_stat_io_update_requested(&mirror->read_stat, requested);
662 set_bit(NFS4_FF_MIRROR_STAT_AVAIL, &mirror->flags);
663 spin_unlock(&mirror->lock);
664
665 if (report)
666 pnfs_report_layoutstat(inode, GFP_KERNEL);
667}
668
669static void
670nfs4_ff_layout_stat_io_end_read(struct rpc_task *task,
671 struct nfs4_ff_layout_mirror *mirror,
672 __u64 requested,
673 __u64 completed)
674{
675 spin_lock(&mirror->lock);
676 nfs4_ff_layout_stat_io_update_completed(&mirror->read_stat,
677 requested, completed,
678 ktime_get(), task->tk_start);
679 set_bit(NFS4_FF_MIRROR_STAT_AVAIL, &mirror->flags);
680 spin_unlock(&mirror->lock);
681}
682
683static void
684nfs4_ff_layout_stat_io_start_write(struct inode *inode,
685 struct nfs4_ff_layout_mirror *mirror,
686 __u64 requested, ktime_t now)
687{
688 bool report;
689
690 spin_lock(&mirror->lock);
691 report = nfs4_ff_layoutstat_start_io(mirror , &mirror->write_stat, now);
692 nfs4_ff_layout_stat_io_update_requested(&mirror->write_stat, requested);
693 set_bit(NFS4_FF_MIRROR_STAT_AVAIL, &mirror->flags);
694 spin_unlock(&mirror->lock);
695
696 if (report)
697 pnfs_report_layoutstat(inode, GFP_NOIO);
698}
699
700static void
701nfs4_ff_layout_stat_io_end_write(struct rpc_task *task,
702 struct nfs4_ff_layout_mirror *mirror,
703 __u64 requested,
704 __u64 completed,
705 enum nfs3_stable_how committed)
706{
707 if (committed == NFS_UNSTABLE)
708 requested = completed = 0;
709
710 spin_lock(&mirror->lock);
711 nfs4_ff_layout_stat_io_update_completed(&mirror->write_stat,
712 requested, completed, ktime_get(), task->tk_start);
713 set_bit(NFS4_FF_MIRROR_STAT_AVAIL, &mirror->flags);
714 spin_unlock(&mirror->lock);
715}
716
717static void
718ff_layout_mark_ds_unreachable(struct pnfs_layout_segment *lseg, u32 idx)
719{
720 struct nfs4_deviceid_node *devid = FF_LAYOUT_DEVID_NODE(lseg, idx);
721
722 if (devid)
723 nfs4_mark_deviceid_unavailable(devid);
724}
725
726static void
727ff_layout_mark_ds_reachable(struct pnfs_layout_segment *lseg, u32 idx)
728{
729 struct nfs4_deviceid_node *devid = FF_LAYOUT_DEVID_NODE(lseg, idx);
730
731 if (devid)
732 nfs4_mark_deviceid_available(devid);
733}
734
735static struct nfs4_pnfs_ds *
736ff_layout_choose_ds_for_read(struct pnfs_layout_segment *lseg,
737 u32 start_idx, u32 *best_idx,
738 bool check_device)
739{
740 struct nfs4_ff_layout_segment *fls = FF_LAYOUT_LSEG(lseg);
741 struct nfs4_ff_layout_mirror *mirror;
742 struct nfs4_pnfs_ds *ds;
743 u32 idx;
744
745
746 for (idx = start_idx; idx < fls->mirror_array_cnt; idx++) {
747 mirror = FF_LAYOUT_COMP(lseg, idx);
748 ds = nfs4_ff_layout_prepare_ds(lseg, mirror, false);
749 if (!ds)
750 continue;
751
752 if (check_device &&
753 nfs4_test_deviceid_unavailable(&mirror->mirror_ds->id_node))
754 continue;
755
756 *best_idx = idx;
757 return ds;
758 }
759
760 return NULL;
761}
762
763static struct nfs4_pnfs_ds *
764ff_layout_choose_any_ds_for_read(struct pnfs_layout_segment *lseg,
765 u32 start_idx, u32 *best_idx)
766{
767 return ff_layout_choose_ds_for_read(lseg, start_idx, best_idx, false);
768}
769
770static struct nfs4_pnfs_ds *
771ff_layout_choose_valid_ds_for_read(struct pnfs_layout_segment *lseg,
772 u32 start_idx, u32 *best_idx)
773{
774 return ff_layout_choose_ds_for_read(lseg, start_idx, best_idx, true);
775}
776
777static struct nfs4_pnfs_ds *
778ff_layout_choose_best_ds_for_read(struct pnfs_layout_segment *lseg,
779 u32 start_idx, u32 *best_idx)
780{
781 struct nfs4_pnfs_ds *ds;
782
783 ds = ff_layout_choose_valid_ds_for_read(lseg, start_idx, best_idx);
784 if (ds)
785 return ds;
786 return ff_layout_choose_any_ds_for_read(lseg, start_idx, best_idx);
787}
788
789static struct nfs4_pnfs_ds *
790ff_layout_get_ds_for_read(struct nfs_pageio_descriptor *pgio,
791 u32 *best_idx)
792{
793 struct pnfs_layout_segment *lseg = pgio->pg_lseg;
794 struct nfs4_pnfs_ds *ds;
795
796 ds = ff_layout_choose_best_ds_for_read(lseg, pgio->pg_mirror_idx,
797 best_idx);
798 if (ds || !pgio->pg_mirror_idx)
799 return ds;
800 return ff_layout_choose_best_ds_for_read(lseg, 0, best_idx);
801}
802
803static void
804ff_layout_pg_get_read(struct nfs_pageio_descriptor *pgio,
805 struct nfs_page *req,
806 bool strict_iomode)
807{
808 pnfs_put_lseg(pgio->pg_lseg);
809 pgio->pg_lseg = pnfs_update_layout(pgio->pg_inode,
810 nfs_req_openctx(req),
811 req_offset(req),
812 req->wb_bytes,
813 IOMODE_READ,
814 strict_iomode,
815 GFP_KERNEL);
816 if (IS_ERR(pgio->pg_lseg)) {
817 pgio->pg_error = PTR_ERR(pgio->pg_lseg);
818 pgio->pg_lseg = NULL;
819 }
820}
821
822static void
823ff_layout_pg_check_layout(struct nfs_pageio_descriptor *pgio,
824 struct nfs_page *req)
825{
826 pnfs_generic_pg_check_layout(pgio);
827 pnfs_generic_pg_check_range(pgio, req);
828}
829
830static void
831ff_layout_pg_init_read(struct nfs_pageio_descriptor *pgio,
832 struct nfs_page *req)
833{
834 struct nfs_pgio_mirror *pgm;
835 struct nfs4_ff_layout_mirror *mirror;
836 struct nfs4_pnfs_ds *ds;
837 u32 ds_idx;
838
839retry:
840 ff_layout_pg_check_layout(pgio, req);
841
842 if (!pgio->pg_lseg) {
843 ff_layout_pg_get_read(pgio, req, false);
844 if (!pgio->pg_lseg)
845 goto out_nolseg;
846 }
847 if (ff_layout_avoid_read_on_rw(pgio->pg_lseg)) {
848 ff_layout_pg_get_read(pgio, req, true);
849 if (!pgio->pg_lseg)
850 goto out_nolseg;
851 }
852
853 ds = ff_layout_get_ds_for_read(pgio, &ds_idx);
854 if (!ds) {
855 if (!ff_layout_no_fallback_to_mds(pgio->pg_lseg))
856 goto out_mds;
857 pnfs_generic_pg_cleanup(pgio);
858
859 ssleep(1);
860 goto retry;
861 }
862
863 mirror = FF_LAYOUT_COMP(pgio->pg_lseg, ds_idx);
864 pgm = &pgio->pg_mirrors[0];
865 pgm->pg_bsize = mirror->mirror_ds->ds_versions[0].rsize;
866
867 pgio->pg_mirror_idx = ds_idx;
868
869 if (NFS_SERVER(pgio->pg_inode)->flags &
870 (NFS_MOUNT_SOFT|NFS_MOUNT_SOFTERR))
871 pgio->pg_maxretrans = io_maxretrans;
872 return;
873out_nolseg:
874 if (pgio->pg_error < 0)
875 return;
876out_mds:
877 trace_pnfs_mds_fallback_pg_init_read(pgio->pg_inode,
878 0, NFS4_MAX_UINT64, IOMODE_READ,
879 NFS_I(pgio->pg_inode)->layout,
880 pgio->pg_lseg);
881 pgio->pg_maxretrans = 0;
882 nfs_pageio_reset_read_mds(pgio);
883}
884
885static void
886ff_layout_pg_init_write(struct nfs_pageio_descriptor *pgio,
887 struct nfs_page *req)
888{
889 struct nfs4_ff_layout_mirror *mirror;
890 struct nfs_pgio_mirror *pgm;
891 struct nfs4_pnfs_ds *ds;
892 u32 i;
893
894retry:
895 ff_layout_pg_check_layout(pgio, req);
896 if (!pgio->pg_lseg) {
897 pgio->pg_lseg = pnfs_update_layout(pgio->pg_inode,
898 nfs_req_openctx(req),
899 req_offset(req),
900 req->wb_bytes,
901 IOMODE_RW,
902 false,
903 GFP_NOFS);
904 if (IS_ERR(pgio->pg_lseg)) {
905 pgio->pg_error = PTR_ERR(pgio->pg_lseg);
906 pgio->pg_lseg = NULL;
907 return;
908 }
909 }
910
911 if (pgio->pg_lseg == NULL)
912 goto out_mds;
913
914
915 if (pgio->pg_mirror_count != FF_LAYOUT_MIRROR_COUNT(pgio->pg_lseg))
916 goto out_eagain;
917
918 for (i = 0; i < pgio->pg_mirror_count; i++) {
919 mirror = FF_LAYOUT_COMP(pgio->pg_lseg, i);
920 ds = nfs4_ff_layout_prepare_ds(pgio->pg_lseg, mirror, true);
921 if (!ds) {
922 if (!ff_layout_no_fallback_to_mds(pgio->pg_lseg))
923 goto out_mds;
924 pnfs_generic_pg_cleanup(pgio);
925
926 ssleep(1);
927 goto retry;
928 }
929 pgm = &pgio->pg_mirrors[i];
930 pgm->pg_bsize = mirror->mirror_ds->ds_versions[0].wsize;
931 }
932
933 if (NFS_SERVER(pgio->pg_inode)->flags &
934 (NFS_MOUNT_SOFT|NFS_MOUNT_SOFTERR))
935 pgio->pg_maxretrans = io_maxretrans;
936 return;
937out_eagain:
938 pnfs_generic_pg_cleanup(pgio);
939 pgio->pg_error = -EAGAIN;
940 return;
941out_mds:
942 trace_pnfs_mds_fallback_pg_init_write(pgio->pg_inode,
943 0, NFS4_MAX_UINT64, IOMODE_RW,
944 NFS_I(pgio->pg_inode)->layout,
945 pgio->pg_lseg);
946 pgio->pg_maxretrans = 0;
947 nfs_pageio_reset_write_mds(pgio);
948 pgio->pg_error = -EAGAIN;
949}
950
951static unsigned int
952ff_layout_pg_get_mirror_count_write(struct nfs_pageio_descriptor *pgio,
953 struct nfs_page *req)
954{
955 if (!pgio->pg_lseg) {
956 pgio->pg_lseg = pnfs_update_layout(pgio->pg_inode,
957 nfs_req_openctx(req),
958 req_offset(req),
959 req->wb_bytes,
960 IOMODE_RW,
961 false,
962 GFP_NOFS);
963 if (IS_ERR(pgio->pg_lseg)) {
964 pgio->pg_error = PTR_ERR(pgio->pg_lseg);
965 pgio->pg_lseg = NULL;
966 goto out;
967 }
968 }
969 if (pgio->pg_lseg)
970 return FF_LAYOUT_MIRROR_COUNT(pgio->pg_lseg);
971
972 trace_pnfs_mds_fallback_pg_get_mirror_count(pgio->pg_inode,
973 0, NFS4_MAX_UINT64, IOMODE_RW,
974 NFS_I(pgio->pg_inode)->layout,
975 pgio->pg_lseg);
976
977 nfs_pageio_reset_write_mds(pgio);
978out:
979 return 1;
980}
981
982static u32
983ff_layout_pg_set_mirror_write(struct nfs_pageio_descriptor *desc, u32 idx)
984{
985 u32 old = desc->pg_mirror_idx;
986
987 desc->pg_mirror_idx = idx;
988 return old;
989}
990
991static struct nfs_pgio_mirror *
992ff_layout_pg_get_mirror_write(struct nfs_pageio_descriptor *desc, u32 idx)
993{
994 return &desc->pg_mirrors[idx];
995}
996
997static const struct nfs_pageio_ops ff_layout_pg_read_ops = {
998 .pg_init = ff_layout_pg_init_read,
999 .pg_test = pnfs_generic_pg_test,
1000 .pg_doio = pnfs_generic_pg_readpages,
1001 .pg_cleanup = pnfs_generic_pg_cleanup,
1002};
1003
1004static const struct nfs_pageio_ops ff_layout_pg_write_ops = {
1005 .pg_init = ff_layout_pg_init_write,
1006 .pg_test = pnfs_generic_pg_test,
1007 .pg_doio = pnfs_generic_pg_writepages,
1008 .pg_get_mirror_count = ff_layout_pg_get_mirror_count_write,
1009 .pg_cleanup = pnfs_generic_pg_cleanup,
1010 .pg_get_mirror = ff_layout_pg_get_mirror_write,
1011 .pg_set_mirror = ff_layout_pg_set_mirror_write,
1012};
1013
1014static void ff_layout_reset_write(struct nfs_pgio_header *hdr, bool retry_pnfs)
1015{
1016 struct rpc_task *task = &hdr->task;
1017
1018 pnfs_layoutcommit_inode(hdr->inode, false);
1019
1020 if (retry_pnfs) {
1021 dprintk("%s Reset task %5u for i/o through pNFS "
1022 "(req %s/%llu, %u bytes @ offset %llu)\n", __func__,
1023 hdr->task.tk_pid,
1024 hdr->inode->i_sb->s_id,
1025 (unsigned long long)NFS_FILEID(hdr->inode),
1026 hdr->args.count,
1027 (unsigned long long)hdr->args.offset);
1028
1029 hdr->completion_ops->reschedule_io(hdr);
1030 return;
1031 }
1032
1033 if (!test_and_set_bit(NFS_IOHDR_REDO, &hdr->flags)) {
1034 dprintk("%s Reset task %5u for i/o through MDS "
1035 "(req %s/%llu, %u bytes @ offset %llu)\n", __func__,
1036 hdr->task.tk_pid,
1037 hdr->inode->i_sb->s_id,
1038 (unsigned long long)NFS_FILEID(hdr->inode),
1039 hdr->args.count,
1040 (unsigned long long)hdr->args.offset);
1041
1042 trace_pnfs_mds_fallback_write_done(hdr->inode,
1043 hdr->args.offset, hdr->args.count,
1044 IOMODE_RW, NFS_I(hdr->inode)->layout,
1045 hdr->lseg);
1046 task->tk_status = pnfs_write_done_resend_to_mds(hdr);
1047 }
1048}
1049
1050static void ff_layout_resend_pnfs_read(struct nfs_pgio_header *hdr)
1051{
1052 u32 idx = hdr->pgio_mirror_idx + 1;
1053 u32 new_idx = 0;
1054
1055 if (ff_layout_choose_any_ds_for_read(hdr->lseg, idx, &new_idx))
1056 ff_layout_send_layouterror(hdr->lseg);
1057 else
1058 pnfs_error_mark_layout_for_return(hdr->inode, hdr->lseg);
1059 pnfs_read_resend_pnfs(hdr, new_idx);
1060}
1061
1062static void ff_layout_reset_read(struct nfs_pgio_header *hdr)
1063{
1064 struct rpc_task *task = &hdr->task;
1065
1066 pnfs_layoutcommit_inode(hdr->inode, false);
1067 pnfs_error_mark_layout_for_return(hdr->inode, hdr->lseg);
1068
1069 if (!test_and_set_bit(NFS_IOHDR_REDO, &hdr->flags)) {
1070 dprintk("%s Reset task %5u for i/o through MDS "
1071 "(req %s/%llu, %u bytes @ offset %llu)\n", __func__,
1072 hdr->task.tk_pid,
1073 hdr->inode->i_sb->s_id,
1074 (unsigned long long)NFS_FILEID(hdr->inode),
1075 hdr->args.count,
1076 (unsigned long long)hdr->args.offset);
1077
1078 trace_pnfs_mds_fallback_read_done(hdr->inode,
1079 hdr->args.offset, hdr->args.count,
1080 IOMODE_READ, NFS_I(hdr->inode)->layout,
1081 hdr->lseg);
1082 task->tk_status = pnfs_read_done_resend_to_mds(hdr);
1083 }
1084}
1085
1086static int ff_layout_async_handle_error_v4(struct rpc_task *task,
1087 struct nfs4_state *state,
1088 struct nfs_client *clp,
1089 struct pnfs_layout_segment *lseg,
1090 u32 idx)
1091{
1092 struct pnfs_layout_hdr *lo = lseg->pls_layout;
1093 struct inode *inode = lo->plh_inode;
1094 struct nfs4_deviceid_node *devid = FF_LAYOUT_DEVID_NODE(lseg, idx);
1095 struct nfs4_slot_table *tbl = &clp->cl_session->fc_slot_table;
1096
1097 switch (task->tk_status) {
1098 case -NFS4ERR_BADSESSION:
1099 case -NFS4ERR_BADSLOT:
1100 case -NFS4ERR_BAD_HIGH_SLOT:
1101 case -NFS4ERR_DEADSESSION:
1102 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
1103 case -NFS4ERR_SEQ_FALSE_RETRY:
1104 case -NFS4ERR_SEQ_MISORDERED:
1105 dprintk("%s ERROR %d, Reset session. Exchangeid "
1106 "flags 0x%x\n", __func__, task->tk_status,
1107 clp->cl_exchange_flags);
1108 nfs4_schedule_session_recovery(clp->cl_session, task->tk_status);
1109 break;
1110 case -NFS4ERR_DELAY:
1111 case -NFS4ERR_GRACE:
1112 rpc_delay(task, FF_LAYOUT_POLL_RETRY_MAX);
1113 break;
1114 case -NFS4ERR_RETRY_UNCACHED_REP:
1115 break;
1116
1117 case -NFS4ERR_PNFS_NO_LAYOUT:
1118 case -ESTALE:
1119 case -EBADHANDLE:
1120 case -EISDIR:
1121 case -NFS4ERR_FHEXPIRED:
1122 case -NFS4ERR_WRONG_TYPE:
1123 dprintk("%s Invalid layout error %d\n", __func__,
1124 task->tk_status);
1125
1126
1127
1128
1129
1130
1131
1132 pnfs_destroy_layout(NFS_I(inode));
1133 rpc_wake_up(&tbl->slot_tbl_waitq);
1134 goto reset;
1135
1136 case -ECONNREFUSED:
1137 case -EHOSTDOWN:
1138 case -EHOSTUNREACH:
1139 case -ENETUNREACH:
1140 case -EIO:
1141 case -ETIMEDOUT:
1142 case -EPIPE:
1143 dprintk("%s DS connection error %d\n", __func__,
1144 task->tk_status);
1145 nfs4_delete_deviceid(devid->ld, devid->nfs_client,
1146 &devid->deviceid);
1147 rpc_wake_up(&tbl->slot_tbl_waitq);
1148 fallthrough;
1149 default:
1150 if (ff_layout_avoid_mds_available_ds(lseg))
1151 return -NFS4ERR_RESET_TO_PNFS;
1152reset:
1153 dprintk("%s Retry through MDS. Error %d\n", __func__,
1154 task->tk_status);
1155 return -NFS4ERR_RESET_TO_MDS;
1156 }
1157 task->tk_status = 0;
1158 return -EAGAIN;
1159}
1160
1161
1162static int ff_layout_async_handle_error_v3(struct rpc_task *task,
1163 struct pnfs_layout_segment *lseg,
1164 u32 idx)
1165{
1166 struct nfs4_deviceid_node *devid = FF_LAYOUT_DEVID_NODE(lseg, idx);
1167
1168 switch (task->tk_status) {
1169
1170 case -EACCES:
1171 case -ESTALE:
1172 case -EISDIR:
1173 case -EBADHANDLE:
1174 case -ELOOP:
1175 case -ENOSPC:
1176 break;
1177 case -EJUKEBOX:
1178 nfs_inc_stats(lseg->pls_layout->plh_inode, NFSIOS_DELAY);
1179 goto out_retry;
1180 default:
1181 dprintk("%s DS connection error %d\n", __func__,
1182 task->tk_status);
1183 nfs4_delete_deviceid(devid->ld, devid->nfs_client,
1184 &devid->deviceid);
1185 }
1186
1187 return -NFS4ERR_RESET_TO_PNFS;
1188out_retry:
1189 task->tk_status = 0;
1190 rpc_restart_call_prepare(task);
1191 rpc_delay(task, NFS_JUKEBOX_RETRY_TIME);
1192 return -EAGAIN;
1193}
1194
1195static int ff_layout_async_handle_error(struct rpc_task *task,
1196 struct nfs4_state *state,
1197 struct nfs_client *clp,
1198 struct pnfs_layout_segment *lseg,
1199 u32 idx)
1200{
1201 int vers = clp->cl_nfs_mod->rpc_vers->number;
1202
1203 if (task->tk_status >= 0) {
1204 ff_layout_mark_ds_reachable(lseg, idx);
1205 return 0;
1206 }
1207
1208
1209 if (!pnfs_is_valid_lseg(lseg))
1210 return -NFS4ERR_RESET_TO_PNFS;
1211
1212 switch (vers) {
1213 case 3:
1214 return ff_layout_async_handle_error_v3(task, lseg, idx);
1215 case 4:
1216 return ff_layout_async_handle_error_v4(task, state, clp,
1217 lseg, idx);
1218 default:
1219
1220 WARN_ON_ONCE(1);
1221 return 0;
1222 }
1223}
1224
1225static void ff_layout_io_track_ds_error(struct pnfs_layout_segment *lseg,
1226 u32 idx, u64 offset, u64 length,
1227 u32 *op_status, int opnum, int error)
1228{
1229 struct nfs4_ff_layout_mirror *mirror;
1230 u32 status = *op_status;
1231 int err;
1232
1233 if (status == 0) {
1234 switch (error) {
1235 case -ETIMEDOUT:
1236 case -EPFNOSUPPORT:
1237 case -EPROTONOSUPPORT:
1238 case -EOPNOTSUPP:
1239 case -ECONNREFUSED:
1240 case -ECONNRESET:
1241 case -EHOSTDOWN:
1242 case -EHOSTUNREACH:
1243 case -ENETUNREACH:
1244 case -EADDRINUSE:
1245 case -ENOBUFS:
1246 case -EPIPE:
1247 case -EPERM:
1248 *op_status = status = NFS4ERR_NXIO;
1249 break;
1250 case -EACCES:
1251 *op_status = status = NFS4ERR_ACCESS;
1252 break;
1253 default:
1254 return;
1255 }
1256 }
1257
1258 mirror = FF_LAYOUT_COMP(lseg, idx);
1259 err = ff_layout_track_ds_error(FF_LAYOUT_FROM_HDR(lseg->pls_layout),
1260 mirror, offset, length, status, opnum,
1261 GFP_NOIO);
1262
1263 switch (status) {
1264 case NFS4ERR_DELAY:
1265 case NFS4ERR_GRACE:
1266 break;
1267 case NFS4ERR_NXIO:
1268 ff_layout_mark_ds_unreachable(lseg, idx);
1269
1270
1271
1272
1273 if (opnum == OP_READ)
1274 break;
1275 fallthrough;
1276 default:
1277 pnfs_error_mark_layout_for_return(lseg->pls_layout->plh_inode,
1278 lseg);
1279 }
1280
1281 dprintk("%s: err %d op %d status %u\n", __func__, err, opnum, status);
1282}
1283
1284
1285static int ff_layout_read_done_cb(struct rpc_task *task,
1286 struct nfs_pgio_header *hdr)
1287{
1288 int err;
1289
1290 if (task->tk_status < 0) {
1291 ff_layout_io_track_ds_error(hdr->lseg, hdr->pgio_mirror_idx,
1292 hdr->args.offset, hdr->args.count,
1293 &hdr->res.op_status, OP_READ,
1294 task->tk_status);
1295 trace_ff_layout_read_error(hdr);
1296 }
1297
1298 err = ff_layout_async_handle_error(task, hdr->args.context->state,
1299 hdr->ds_clp, hdr->lseg,
1300 hdr->pgio_mirror_idx);
1301
1302 trace_nfs4_pnfs_read(hdr, err);
1303 clear_bit(NFS_IOHDR_RESEND_PNFS, &hdr->flags);
1304 clear_bit(NFS_IOHDR_RESEND_MDS, &hdr->flags);
1305 switch (err) {
1306 case -NFS4ERR_RESET_TO_PNFS:
1307 set_bit(NFS_IOHDR_RESEND_PNFS, &hdr->flags);
1308 return task->tk_status;
1309 case -NFS4ERR_RESET_TO_MDS:
1310 set_bit(NFS_IOHDR_RESEND_MDS, &hdr->flags);
1311 return task->tk_status;
1312 case -EAGAIN:
1313 goto out_eagain;
1314 }
1315
1316 return 0;
1317out_eagain:
1318 rpc_restart_call_prepare(task);
1319 return -EAGAIN;
1320}
1321
1322static bool
1323ff_layout_need_layoutcommit(struct pnfs_layout_segment *lseg)
1324{
1325 return !(FF_LAYOUT_LSEG(lseg)->flags & FF_FLAGS_NO_LAYOUTCOMMIT);
1326}
1327
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337static void
1338ff_layout_set_layoutcommit(struct inode *inode,
1339 struct pnfs_layout_segment *lseg,
1340 loff_t end_offset)
1341{
1342 if (!ff_layout_need_layoutcommit(lseg))
1343 return;
1344
1345 pnfs_set_layoutcommit(inode, lseg, end_offset);
1346 dprintk("%s inode %lu pls_end_pos %llu\n", __func__, inode->i_ino,
1347 (unsigned long long) NFS_I(inode)->layout->plh_lwb);
1348}
1349
1350static void ff_layout_read_record_layoutstats_start(struct rpc_task *task,
1351 struct nfs_pgio_header *hdr)
1352{
1353 if (test_and_set_bit(NFS_IOHDR_STAT, &hdr->flags))
1354 return;
1355 nfs4_ff_layout_stat_io_start_read(hdr->inode,
1356 FF_LAYOUT_COMP(hdr->lseg, hdr->pgio_mirror_idx),
1357 hdr->args.count,
1358 task->tk_start);
1359}
1360
1361static void ff_layout_read_record_layoutstats_done(struct rpc_task *task,
1362 struct nfs_pgio_header *hdr)
1363{
1364 if (!test_and_clear_bit(NFS_IOHDR_STAT, &hdr->flags))
1365 return;
1366 nfs4_ff_layout_stat_io_end_read(task,
1367 FF_LAYOUT_COMP(hdr->lseg, hdr->pgio_mirror_idx),
1368 hdr->args.count,
1369 hdr->res.count);
1370 set_bit(NFS_LSEG_LAYOUTRETURN, &hdr->lseg->pls_flags);
1371}
1372
1373static int ff_layout_read_prepare_common(struct rpc_task *task,
1374 struct nfs_pgio_header *hdr)
1375{
1376 if (unlikely(test_bit(NFS_CONTEXT_BAD, &hdr->args.context->flags))) {
1377 rpc_exit(task, -EIO);
1378 return -EIO;
1379 }
1380
1381 ff_layout_read_record_layoutstats_start(task, hdr);
1382 return 0;
1383}
1384
1385
1386
1387
1388
1389
1390static void ff_layout_read_prepare_v3(struct rpc_task *task, void *data)
1391{
1392 struct nfs_pgio_header *hdr = data;
1393
1394 if (ff_layout_read_prepare_common(task, hdr))
1395 return;
1396
1397 rpc_call_start(task);
1398}
1399
1400static void ff_layout_read_prepare_v4(struct rpc_task *task, void *data)
1401{
1402 struct nfs_pgio_header *hdr = data;
1403
1404 if (nfs4_setup_sequence(hdr->ds_clp,
1405 &hdr->args.seq_args,
1406 &hdr->res.seq_res,
1407 task))
1408 return;
1409
1410 ff_layout_read_prepare_common(task, hdr);
1411}
1412
1413static void ff_layout_read_call_done(struct rpc_task *task, void *data)
1414{
1415 struct nfs_pgio_header *hdr = data;
1416
1417 dprintk("--> %s task->tk_status %d\n", __func__, task->tk_status);
1418
1419 if (test_bit(NFS_IOHDR_REDO, &hdr->flags) &&
1420 task->tk_status == 0) {
1421 nfs4_sequence_done(task, &hdr->res.seq_res);
1422 return;
1423 }
1424
1425
1426 hdr->mds_ops->rpc_call_done(task, hdr);
1427}
1428
1429static void ff_layout_read_count_stats(struct rpc_task *task, void *data)
1430{
1431 struct nfs_pgio_header *hdr = data;
1432
1433 ff_layout_read_record_layoutstats_done(task, hdr);
1434 rpc_count_iostats_metrics(task,
1435 &NFS_CLIENT(hdr->inode)->cl_metrics[NFSPROC4_CLNT_READ]);
1436}
1437
1438static void ff_layout_read_release(void *data)
1439{
1440 struct nfs_pgio_header *hdr = data;
1441
1442 ff_layout_read_record_layoutstats_done(&hdr->task, hdr);
1443 if (test_bit(NFS_IOHDR_RESEND_PNFS, &hdr->flags))
1444 ff_layout_resend_pnfs_read(hdr);
1445 else if (test_bit(NFS_IOHDR_RESEND_MDS, &hdr->flags))
1446 ff_layout_reset_read(hdr);
1447 pnfs_generic_rw_release(data);
1448}
1449
1450
1451static int ff_layout_write_done_cb(struct rpc_task *task,
1452 struct nfs_pgio_header *hdr)
1453{
1454 loff_t end_offs = 0;
1455 int err;
1456
1457 if (task->tk_status < 0) {
1458 ff_layout_io_track_ds_error(hdr->lseg, hdr->pgio_mirror_idx,
1459 hdr->args.offset, hdr->args.count,
1460 &hdr->res.op_status, OP_WRITE,
1461 task->tk_status);
1462 trace_ff_layout_write_error(hdr);
1463 }
1464
1465 err = ff_layout_async_handle_error(task, hdr->args.context->state,
1466 hdr->ds_clp, hdr->lseg,
1467 hdr->pgio_mirror_idx);
1468
1469 trace_nfs4_pnfs_write(hdr, err);
1470 clear_bit(NFS_IOHDR_RESEND_PNFS, &hdr->flags);
1471 clear_bit(NFS_IOHDR_RESEND_MDS, &hdr->flags);
1472 switch (err) {
1473 case -NFS4ERR_RESET_TO_PNFS:
1474 set_bit(NFS_IOHDR_RESEND_PNFS, &hdr->flags);
1475 return task->tk_status;
1476 case -NFS4ERR_RESET_TO_MDS:
1477 set_bit(NFS_IOHDR_RESEND_MDS, &hdr->flags);
1478 return task->tk_status;
1479 case -EAGAIN:
1480 return -EAGAIN;
1481 }
1482
1483 if (hdr->res.verf->committed == NFS_FILE_SYNC ||
1484 hdr->res.verf->committed == NFS_DATA_SYNC)
1485 end_offs = hdr->mds_offset + (loff_t)hdr->res.count;
1486
1487
1488 ff_layout_set_layoutcommit(hdr->inode, hdr->lseg, end_offs);
1489
1490
1491 hdr->fattr.valid = 0;
1492 if (task->tk_status >= 0)
1493 nfs_writeback_update_inode(hdr);
1494
1495 return 0;
1496}
1497
1498static int ff_layout_commit_done_cb(struct rpc_task *task,
1499 struct nfs_commit_data *data)
1500{
1501 int err;
1502
1503 if (task->tk_status < 0) {
1504 ff_layout_io_track_ds_error(data->lseg, data->ds_commit_index,
1505 data->args.offset, data->args.count,
1506 &data->res.op_status, OP_COMMIT,
1507 task->tk_status);
1508 trace_ff_layout_commit_error(data);
1509 }
1510
1511 err = ff_layout_async_handle_error(task, NULL, data->ds_clp,
1512 data->lseg, data->ds_commit_index);
1513
1514 trace_nfs4_pnfs_commit_ds(data, err);
1515 switch (err) {
1516 case -NFS4ERR_RESET_TO_PNFS:
1517 pnfs_generic_prepare_to_resend_writes(data);
1518 return -EAGAIN;
1519 case -NFS4ERR_RESET_TO_MDS:
1520 pnfs_generic_prepare_to_resend_writes(data);
1521 return -EAGAIN;
1522 case -EAGAIN:
1523 rpc_restart_call_prepare(task);
1524 return -EAGAIN;
1525 }
1526
1527 ff_layout_set_layoutcommit(data->inode, data->lseg, data->lwb);
1528
1529 return 0;
1530}
1531
1532static void ff_layout_write_record_layoutstats_start(struct rpc_task *task,
1533 struct nfs_pgio_header *hdr)
1534{
1535 if (test_and_set_bit(NFS_IOHDR_STAT, &hdr->flags))
1536 return;
1537 nfs4_ff_layout_stat_io_start_write(hdr->inode,
1538 FF_LAYOUT_COMP(hdr->lseg, hdr->pgio_mirror_idx),
1539 hdr->args.count,
1540 task->tk_start);
1541}
1542
1543static void ff_layout_write_record_layoutstats_done(struct rpc_task *task,
1544 struct nfs_pgio_header *hdr)
1545{
1546 if (!test_and_clear_bit(NFS_IOHDR_STAT, &hdr->flags))
1547 return;
1548 nfs4_ff_layout_stat_io_end_write(task,
1549 FF_LAYOUT_COMP(hdr->lseg, hdr->pgio_mirror_idx),
1550 hdr->args.count, hdr->res.count,
1551 hdr->res.verf->committed);
1552 set_bit(NFS_LSEG_LAYOUTRETURN, &hdr->lseg->pls_flags);
1553}
1554
1555static int ff_layout_write_prepare_common(struct rpc_task *task,
1556 struct nfs_pgio_header *hdr)
1557{
1558 if (unlikely(test_bit(NFS_CONTEXT_BAD, &hdr->args.context->flags))) {
1559 rpc_exit(task, -EIO);
1560 return -EIO;
1561 }
1562
1563 ff_layout_write_record_layoutstats_start(task, hdr);
1564 return 0;
1565}
1566
1567static void ff_layout_write_prepare_v3(struct rpc_task *task, void *data)
1568{
1569 struct nfs_pgio_header *hdr = data;
1570
1571 if (ff_layout_write_prepare_common(task, hdr))
1572 return;
1573
1574 rpc_call_start(task);
1575}
1576
1577static void ff_layout_write_prepare_v4(struct rpc_task *task, void *data)
1578{
1579 struct nfs_pgio_header *hdr = data;
1580
1581 if (nfs4_setup_sequence(hdr->ds_clp,
1582 &hdr->args.seq_args,
1583 &hdr->res.seq_res,
1584 task))
1585 return;
1586
1587 ff_layout_write_prepare_common(task, hdr);
1588}
1589
1590static void ff_layout_write_call_done(struct rpc_task *task, void *data)
1591{
1592 struct nfs_pgio_header *hdr = data;
1593
1594 if (test_bit(NFS_IOHDR_REDO, &hdr->flags) &&
1595 task->tk_status == 0) {
1596 nfs4_sequence_done(task, &hdr->res.seq_res);
1597 return;
1598 }
1599
1600
1601 hdr->mds_ops->rpc_call_done(task, hdr);
1602}
1603
1604static void ff_layout_write_count_stats(struct rpc_task *task, void *data)
1605{
1606 struct nfs_pgio_header *hdr = data;
1607
1608 ff_layout_write_record_layoutstats_done(task, hdr);
1609 rpc_count_iostats_metrics(task,
1610 &NFS_CLIENT(hdr->inode)->cl_metrics[NFSPROC4_CLNT_WRITE]);
1611}
1612
1613static void ff_layout_write_release(void *data)
1614{
1615 struct nfs_pgio_header *hdr = data;
1616
1617 ff_layout_write_record_layoutstats_done(&hdr->task, hdr);
1618 if (test_bit(NFS_IOHDR_RESEND_PNFS, &hdr->flags)) {
1619 ff_layout_send_layouterror(hdr->lseg);
1620 ff_layout_reset_write(hdr, true);
1621 } else if (test_bit(NFS_IOHDR_RESEND_MDS, &hdr->flags))
1622 ff_layout_reset_write(hdr, false);
1623 pnfs_generic_rw_release(data);
1624}
1625
1626static void ff_layout_commit_record_layoutstats_start(struct rpc_task *task,
1627 struct nfs_commit_data *cdata)
1628{
1629 if (test_and_set_bit(NFS_IOHDR_STAT, &cdata->flags))
1630 return;
1631 nfs4_ff_layout_stat_io_start_write(cdata->inode,
1632 FF_LAYOUT_COMP(cdata->lseg, cdata->ds_commit_index),
1633 0, task->tk_start);
1634}
1635
1636static void ff_layout_commit_record_layoutstats_done(struct rpc_task *task,
1637 struct nfs_commit_data *cdata)
1638{
1639 struct nfs_page *req;
1640 __u64 count = 0;
1641
1642 if (!test_and_clear_bit(NFS_IOHDR_STAT, &cdata->flags))
1643 return;
1644
1645 if (task->tk_status == 0) {
1646 list_for_each_entry(req, &cdata->pages, wb_list)
1647 count += req->wb_bytes;
1648 }
1649 nfs4_ff_layout_stat_io_end_write(task,
1650 FF_LAYOUT_COMP(cdata->lseg, cdata->ds_commit_index),
1651 count, count, NFS_FILE_SYNC);
1652 set_bit(NFS_LSEG_LAYOUTRETURN, &cdata->lseg->pls_flags);
1653}
1654
1655static void ff_layout_commit_prepare_common(struct rpc_task *task,
1656 struct nfs_commit_data *cdata)
1657{
1658 ff_layout_commit_record_layoutstats_start(task, cdata);
1659}
1660
1661static void ff_layout_commit_prepare_v3(struct rpc_task *task, void *data)
1662{
1663 ff_layout_commit_prepare_common(task, data);
1664 rpc_call_start(task);
1665}
1666
1667static void ff_layout_commit_prepare_v4(struct rpc_task *task, void *data)
1668{
1669 struct nfs_commit_data *wdata = data;
1670
1671 if (nfs4_setup_sequence(wdata->ds_clp,
1672 &wdata->args.seq_args,
1673 &wdata->res.seq_res,
1674 task))
1675 return;
1676 ff_layout_commit_prepare_common(task, data);
1677}
1678
1679static void ff_layout_commit_done(struct rpc_task *task, void *data)
1680{
1681 pnfs_generic_write_commit_done(task, data);
1682}
1683
1684static void ff_layout_commit_count_stats(struct rpc_task *task, void *data)
1685{
1686 struct nfs_commit_data *cdata = data;
1687
1688 ff_layout_commit_record_layoutstats_done(task, cdata);
1689 rpc_count_iostats_metrics(task,
1690 &NFS_CLIENT(cdata->inode)->cl_metrics[NFSPROC4_CLNT_COMMIT]);
1691}
1692
1693static void ff_layout_commit_release(void *data)
1694{
1695 struct nfs_commit_data *cdata = data;
1696
1697 ff_layout_commit_record_layoutstats_done(&cdata->task, cdata);
1698 pnfs_generic_commit_release(data);
1699}
1700
1701static const struct rpc_call_ops ff_layout_read_call_ops_v3 = {
1702 .rpc_call_prepare = ff_layout_read_prepare_v3,
1703 .rpc_call_done = ff_layout_read_call_done,
1704 .rpc_count_stats = ff_layout_read_count_stats,
1705 .rpc_release = ff_layout_read_release,
1706};
1707
1708static const struct rpc_call_ops ff_layout_read_call_ops_v4 = {
1709 .rpc_call_prepare = ff_layout_read_prepare_v4,
1710 .rpc_call_done = ff_layout_read_call_done,
1711 .rpc_count_stats = ff_layout_read_count_stats,
1712 .rpc_release = ff_layout_read_release,
1713};
1714
1715static const struct rpc_call_ops ff_layout_write_call_ops_v3 = {
1716 .rpc_call_prepare = ff_layout_write_prepare_v3,
1717 .rpc_call_done = ff_layout_write_call_done,
1718 .rpc_count_stats = ff_layout_write_count_stats,
1719 .rpc_release = ff_layout_write_release,
1720};
1721
1722static const struct rpc_call_ops ff_layout_write_call_ops_v4 = {
1723 .rpc_call_prepare = ff_layout_write_prepare_v4,
1724 .rpc_call_done = ff_layout_write_call_done,
1725 .rpc_count_stats = ff_layout_write_count_stats,
1726 .rpc_release = ff_layout_write_release,
1727};
1728
1729static const struct rpc_call_ops ff_layout_commit_call_ops_v3 = {
1730 .rpc_call_prepare = ff_layout_commit_prepare_v3,
1731 .rpc_call_done = ff_layout_commit_done,
1732 .rpc_count_stats = ff_layout_commit_count_stats,
1733 .rpc_release = ff_layout_commit_release,
1734};
1735
1736static const struct rpc_call_ops ff_layout_commit_call_ops_v4 = {
1737 .rpc_call_prepare = ff_layout_commit_prepare_v4,
1738 .rpc_call_done = ff_layout_commit_done,
1739 .rpc_count_stats = ff_layout_commit_count_stats,
1740 .rpc_release = ff_layout_commit_release,
1741};
1742
1743static enum pnfs_try_status
1744ff_layout_read_pagelist(struct nfs_pgio_header *hdr)
1745{
1746 struct pnfs_layout_segment *lseg = hdr->lseg;
1747 struct nfs4_pnfs_ds *ds;
1748 struct rpc_clnt *ds_clnt;
1749 struct nfs4_ff_layout_mirror *mirror;
1750 const struct cred *ds_cred;
1751 loff_t offset = hdr->args.offset;
1752 u32 idx = hdr->pgio_mirror_idx;
1753 int vers;
1754 struct nfs_fh *fh;
1755
1756 dprintk("--> %s ino %lu pgbase %u req %zu@%llu\n",
1757 __func__, hdr->inode->i_ino,
1758 hdr->args.pgbase, (size_t)hdr->args.count, offset);
1759
1760 mirror = FF_LAYOUT_COMP(lseg, idx);
1761 ds = nfs4_ff_layout_prepare_ds(lseg, mirror, false);
1762 if (!ds)
1763 goto out_failed;
1764
1765 ds_clnt = nfs4_ff_find_or_create_ds_client(mirror, ds->ds_clp,
1766 hdr->inode);
1767 if (IS_ERR(ds_clnt))
1768 goto out_failed;
1769
1770 ds_cred = ff_layout_get_ds_cred(mirror, &lseg->pls_range, hdr->cred);
1771 if (!ds_cred)
1772 goto out_failed;
1773
1774 vers = nfs4_ff_layout_ds_version(mirror);
1775
1776 dprintk("%s USE DS: %s cl_count %d vers %d\n", __func__,
1777 ds->ds_remotestr, refcount_read(&ds->ds_clp->cl_count), vers);
1778
1779 hdr->pgio_done_cb = ff_layout_read_done_cb;
1780 refcount_inc(&ds->ds_clp->cl_count);
1781 hdr->ds_clp = ds->ds_clp;
1782 fh = nfs4_ff_layout_select_ds_fh(mirror);
1783 if (fh)
1784 hdr->args.fh = fh;
1785
1786 nfs4_ff_layout_select_ds_stateid(mirror, &hdr->args.stateid);
1787
1788
1789
1790
1791
1792 hdr->args.offset = offset;
1793 hdr->mds_offset = offset;
1794
1795
1796 nfs_initiate_pgio(ds_clnt, hdr, ds_cred, ds->ds_clp->rpc_ops,
1797 vers == 3 ? &ff_layout_read_call_ops_v3 :
1798 &ff_layout_read_call_ops_v4,
1799 0, RPC_TASK_SOFTCONN);
1800 put_cred(ds_cred);
1801 return PNFS_ATTEMPTED;
1802
1803out_failed:
1804 if (ff_layout_avoid_mds_available_ds(lseg))
1805 return PNFS_TRY_AGAIN;
1806 trace_pnfs_mds_fallback_read_pagelist(hdr->inode,
1807 hdr->args.offset, hdr->args.count,
1808 IOMODE_READ, NFS_I(hdr->inode)->layout, lseg);
1809 return PNFS_NOT_ATTEMPTED;
1810}
1811
1812
1813static enum pnfs_try_status
1814ff_layout_write_pagelist(struct nfs_pgio_header *hdr, int sync)
1815{
1816 struct pnfs_layout_segment *lseg = hdr->lseg;
1817 struct nfs4_pnfs_ds *ds;
1818 struct rpc_clnt *ds_clnt;
1819 struct nfs4_ff_layout_mirror *mirror;
1820 const struct cred *ds_cred;
1821 loff_t offset = hdr->args.offset;
1822 int vers;
1823 struct nfs_fh *fh;
1824 u32 idx = hdr->pgio_mirror_idx;
1825
1826 mirror = FF_LAYOUT_COMP(lseg, idx);
1827 ds = nfs4_ff_layout_prepare_ds(lseg, mirror, true);
1828 if (!ds)
1829 goto out_failed;
1830
1831 ds_clnt = nfs4_ff_find_or_create_ds_client(mirror, ds->ds_clp,
1832 hdr->inode);
1833 if (IS_ERR(ds_clnt))
1834 goto out_failed;
1835
1836 ds_cred = ff_layout_get_ds_cred(mirror, &lseg->pls_range, hdr->cred);
1837 if (!ds_cred)
1838 goto out_failed;
1839
1840 vers = nfs4_ff_layout_ds_version(mirror);
1841
1842 dprintk("%s ino %lu sync %d req %zu@%llu DS: %s cl_count %d vers %d\n",
1843 __func__, hdr->inode->i_ino, sync, (size_t) hdr->args.count,
1844 offset, ds->ds_remotestr, refcount_read(&ds->ds_clp->cl_count),
1845 vers);
1846
1847 hdr->pgio_done_cb = ff_layout_write_done_cb;
1848 refcount_inc(&ds->ds_clp->cl_count);
1849 hdr->ds_clp = ds->ds_clp;
1850 hdr->ds_commit_idx = idx;
1851 fh = nfs4_ff_layout_select_ds_fh(mirror);
1852 if (fh)
1853 hdr->args.fh = fh;
1854
1855 nfs4_ff_layout_select_ds_stateid(mirror, &hdr->args.stateid);
1856
1857
1858
1859
1860
1861 hdr->args.offset = offset;
1862
1863
1864 nfs_initiate_pgio(ds_clnt, hdr, ds_cred, ds->ds_clp->rpc_ops,
1865 vers == 3 ? &ff_layout_write_call_ops_v3 :
1866 &ff_layout_write_call_ops_v4,
1867 sync, RPC_TASK_SOFTCONN);
1868 put_cred(ds_cred);
1869 return PNFS_ATTEMPTED;
1870
1871out_failed:
1872 if (ff_layout_avoid_mds_available_ds(lseg))
1873 return PNFS_TRY_AGAIN;
1874 trace_pnfs_mds_fallback_write_pagelist(hdr->inode,
1875 hdr->args.offset, hdr->args.count,
1876 IOMODE_RW, NFS_I(hdr->inode)->layout, lseg);
1877 return PNFS_NOT_ATTEMPTED;
1878}
1879
1880static u32 calc_ds_index_from_commit(struct pnfs_layout_segment *lseg, u32 i)
1881{
1882 return i;
1883}
1884
1885static struct nfs_fh *
1886select_ds_fh_from_commit(struct pnfs_layout_segment *lseg, u32 i)
1887{
1888 struct nfs4_ff_layout_segment *flseg = FF_LAYOUT_LSEG(lseg);
1889
1890
1891
1892
1893 return &flseg->mirror_array[i]->fh_versions[0];
1894}
1895
1896static int ff_layout_initiate_commit(struct nfs_commit_data *data, int how)
1897{
1898 struct pnfs_layout_segment *lseg = data->lseg;
1899 struct nfs4_pnfs_ds *ds;
1900 struct rpc_clnt *ds_clnt;
1901 struct nfs4_ff_layout_mirror *mirror;
1902 const struct cred *ds_cred;
1903 u32 idx;
1904 int vers, ret;
1905 struct nfs_fh *fh;
1906
1907 if (!lseg || !(pnfs_is_valid_lseg(lseg) ||
1908 test_bit(NFS_LSEG_LAYOUTRETURN, &lseg->pls_flags)))
1909 goto out_err;
1910
1911 idx = calc_ds_index_from_commit(lseg, data->ds_commit_index);
1912 mirror = FF_LAYOUT_COMP(lseg, idx);
1913 ds = nfs4_ff_layout_prepare_ds(lseg, mirror, true);
1914 if (!ds)
1915 goto out_err;
1916
1917 ds_clnt = nfs4_ff_find_or_create_ds_client(mirror, ds->ds_clp,
1918 data->inode);
1919 if (IS_ERR(ds_clnt))
1920 goto out_err;
1921
1922 ds_cred = ff_layout_get_ds_cred(mirror, &lseg->pls_range, data->cred);
1923 if (!ds_cred)
1924 goto out_err;
1925
1926 vers = nfs4_ff_layout_ds_version(mirror);
1927
1928 dprintk("%s ino %lu, how %d cl_count %d vers %d\n", __func__,
1929 data->inode->i_ino, how, refcount_read(&ds->ds_clp->cl_count),
1930 vers);
1931 data->commit_done_cb = ff_layout_commit_done_cb;
1932 data->cred = ds_cred;
1933 refcount_inc(&ds->ds_clp->cl_count);
1934 data->ds_clp = ds->ds_clp;
1935 fh = select_ds_fh_from_commit(lseg, data->ds_commit_index);
1936 if (fh)
1937 data->args.fh = fh;
1938
1939 ret = nfs_initiate_commit(ds_clnt, data, ds->ds_clp->rpc_ops,
1940 vers == 3 ? &ff_layout_commit_call_ops_v3 :
1941 &ff_layout_commit_call_ops_v4,
1942 how, RPC_TASK_SOFTCONN);
1943 put_cred(ds_cred);
1944 return ret;
1945out_err:
1946 pnfs_generic_prepare_to_resend_writes(data);
1947 pnfs_generic_commit_release(data);
1948 return -EAGAIN;
1949}
1950
1951static int
1952ff_layout_commit_pagelist(struct inode *inode, struct list_head *mds_pages,
1953 int how, struct nfs_commit_info *cinfo)
1954{
1955 return pnfs_generic_commit_pagelist(inode, mds_pages, how, cinfo,
1956 ff_layout_initiate_commit);
1957}
1958
1959static struct pnfs_ds_commit_info *
1960ff_layout_get_ds_info(struct inode *inode)
1961{
1962 struct pnfs_layout_hdr *layout = NFS_I(inode)->layout;
1963
1964 if (layout == NULL)
1965 return NULL;
1966
1967 return &FF_LAYOUT_FROM_HDR(layout)->commit_info;
1968}
1969
1970static void
1971ff_layout_setup_ds_info(struct pnfs_ds_commit_info *fl_cinfo,
1972 struct pnfs_layout_segment *lseg)
1973{
1974 struct nfs4_ff_layout_segment *flseg = FF_LAYOUT_LSEG(lseg);
1975 struct inode *inode = lseg->pls_layout->plh_inode;
1976 struct pnfs_commit_array *array, *new;
1977
1978 new = pnfs_alloc_commit_array(flseg->mirror_array_cnt, GFP_NOIO);
1979 if (new) {
1980 spin_lock(&inode->i_lock);
1981 array = pnfs_add_commit_array(fl_cinfo, new, lseg);
1982 spin_unlock(&inode->i_lock);
1983 if (array != new)
1984 pnfs_free_commit_array(new);
1985 }
1986}
1987
1988static void
1989ff_layout_release_ds_info(struct pnfs_ds_commit_info *fl_cinfo,
1990 struct inode *inode)
1991{
1992 spin_lock(&inode->i_lock);
1993 pnfs_generic_ds_cinfo_destroy(fl_cinfo);
1994 spin_unlock(&inode->i_lock);
1995}
1996
1997static void
1998ff_layout_free_deviceid_node(struct nfs4_deviceid_node *d)
1999{
2000 nfs4_ff_layout_free_deviceid(container_of(d, struct nfs4_ff_layout_ds,
2001 id_node));
2002}
2003
2004static int ff_layout_encode_ioerr(struct xdr_stream *xdr,
2005 const struct nfs4_layoutreturn_args *args,
2006 const struct nfs4_flexfile_layoutreturn_args *ff_args)
2007{
2008 __be32 *start;
2009
2010 start = xdr_reserve_space(xdr, 4);
2011 if (unlikely(!start))
2012 return -E2BIG;
2013
2014 *start = cpu_to_be32(ff_args->num_errors);
2015
2016 return ff_layout_encode_ds_ioerr(xdr, &ff_args->errors);
2017}
2018
2019static void
2020encode_opaque_fixed(struct xdr_stream *xdr, const void *buf, size_t len)
2021{
2022 WARN_ON_ONCE(xdr_stream_encode_opaque_fixed(xdr, buf, len) < 0);
2023}
2024
2025static void
2026ff_layout_encode_ff_iostat_head(struct xdr_stream *xdr,
2027 const nfs4_stateid *stateid,
2028 const struct nfs42_layoutstat_devinfo *devinfo)
2029{
2030 __be32 *p;
2031
2032 p = xdr_reserve_space(xdr, 8 + 8);
2033 p = xdr_encode_hyper(p, devinfo->offset);
2034 p = xdr_encode_hyper(p, devinfo->length);
2035 encode_opaque_fixed(xdr, stateid->data, NFS4_STATEID_SIZE);
2036 p = xdr_reserve_space(xdr, 4*8);
2037 p = xdr_encode_hyper(p, devinfo->read_count);
2038 p = xdr_encode_hyper(p, devinfo->read_bytes);
2039 p = xdr_encode_hyper(p, devinfo->write_count);
2040 p = xdr_encode_hyper(p, devinfo->write_bytes);
2041 encode_opaque_fixed(xdr, devinfo->dev_id.data, NFS4_DEVICEID4_SIZE);
2042}
2043
2044static void
2045ff_layout_encode_ff_iostat(struct xdr_stream *xdr,
2046 const nfs4_stateid *stateid,
2047 const struct nfs42_layoutstat_devinfo *devinfo)
2048{
2049 ff_layout_encode_ff_iostat_head(xdr, stateid, devinfo);
2050 ff_layout_encode_ff_layoutupdate(xdr, devinfo,
2051 devinfo->ld_private.data);
2052}
2053
2054
2055static void ff_layout_encode_iostats_array(struct xdr_stream *xdr,
2056 const struct nfs4_layoutreturn_args *args,
2057 struct nfs4_flexfile_layoutreturn_args *ff_args)
2058{
2059 __be32 *p;
2060 int i;
2061
2062 p = xdr_reserve_space(xdr, 4);
2063 *p = cpu_to_be32(ff_args->num_dev);
2064 for (i = 0; i < ff_args->num_dev; i++)
2065 ff_layout_encode_ff_iostat(xdr,
2066 &args->layout->plh_stateid,
2067 &ff_args->devinfo[i]);
2068}
2069
2070static void
2071ff_layout_free_iostats_array(struct nfs42_layoutstat_devinfo *devinfo,
2072 unsigned int num_entries)
2073{
2074 unsigned int i;
2075
2076 for (i = 0; i < num_entries; i++) {
2077 if (!devinfo[i].ld_private.ops)
2078 continue;
2079 if (!devinfo[i].ld_private.ops->free)
2080 continue;
2081 devinfo[i].ld_private.ops->free(&devinfo[i].ld_private);
2082 }
2083}
2084
2085static struct nfs4_deviceid_node *
2086ff_layout_alloc_deviceid_node(struct nfs_server *server,
2087 struct pnfs_device *pdev, gfp_t gfp_flags)
2088{
2089 struct nfs4_ff_layout_ds *dsaddr;
2090
2091 dsaddr = nfs4_ff_alloc_deviceid_node(server, pdev, gfp_flags);
2092 if (!dsaddr)
2093 return NULL;
2094 return &dsaddr->id_node;
2095}
2096
2097static void
2098ff_layout_encode_layoutreturn(struct xdr_stream *xdr,
2099 const void *voidargs,
2100 const struct nfs4_xdr_opaque_data *ff_opaque)
2101{
2102 const struct nfs4_layoutreturn_args *args = voidargs;
2103 struct nfs4_flexfile_layoutreturn_args *ff_args = ff_opaque->data;
2104 struct xdr_buf tmp_buf = {
2105 .head = {
2106 [0] = {
2107 .iov_base = page_address(ff_args->pages[0]),
2108 },
2109 },
2110 .buflen = PAGE_SIZE,
2111 };
2112 struct xdr_stream tmp_xdr;
2113 __be32 *start;
2114
2115 dprintk("%s: Begin\n", __func__);
2116
2117 xdr_init_encode(&tmp_xdr, &tmp_buf, NULL, NULL);
2118
2119 ff_layout_encode_ioerr(&tmp_xdr, args, ff_args);
2120 ff_layout_encode_iostats_array(&tmp_xdr, args, ff_args);
2121
2122 start = xdr_reserve_space(xdr, 4);
2123 *start = cpu_to_be32(tmp_buf.len);
2124 xdr_write_pages(xdr, ff_args->pages, 0, tmp_buf.len);
2125
2126 dprintk("%s: Return\n", __func__);
2127}
2128
2129static void
2130ff_layout_free_layoutreturn(struct nfs4_xdr_opaque_data *args)
2131{
2132 struct nfs4_flexfile_layoutreturn_args *ff_args;
2133
2134 if (!args->data)
2135 return;
2136 ff_args = args->data;
2137 args->data = NULL;
2138
2139 ff_layout_free_ds_ioerr(&ff_args->errors);
2140 ff_layout_free_iostats_array(ff_args->devinfo, ff_args->num_dev);
2141
2142 put_page(ff_args->pages[0]);
2143 kfree(ff_args);
2144}
2145
2146static const struct nfs4_xdr_opaque_ops layoutreturn_ops = {
2147 .encode = ff_layout_encode_layoutreturn,
2148 .free = ff_layout_free_layoutreturn,
2149};
2150
2151static int
2152ff_layout_prepare_layoutreturn(struct nfs4_layoutreturn_args *args)
2153{
2154 struct nfs4_flexfile_layoutreturn_args *ff_args;
2155 struct nfs4_flexfile_layout *ff_layout = FF_LAYOUT_FROM_HDR(args->layout);
2156
2157 ff_args = kmalloc(sizeof(*ff_args), GFP_KERNEL);
2158 if (!ff_args)
2159 goto out_nomem;
2160 ff_args->pages[0] = alloc_page(GFP_KERNEL);
2161 if (!ff_args->pages[0])
2162 goto out_nomem_free;
2163
2164 INIT_LIST_HEAD(&ff_args->errors);
2165 ff_args->num_errors = ff_layout_fetch_ds_ioerr(args->layout,
2166 &args->range, &ff_args->errors,
2167 FF_LAYOUTRETURN_MAXERR);
2168
2169 spin_lock(&args->inode->i_lock);
2170 ff_args->num_dev = ff_layout_mirror_prepare_stats(&ff_layout->generic_hdr,
2171 &ff_args->devinfo[0], ARRAY_SIZE(ff_args->devinfo));
2172 spin_unlock(&args->inode->i_lock);
2173
2174 args->ld_private->ops = &layoutreturn_ops;
2175 args->ld_private->data = ff_args;
2176 return 0;
2177out_nomem_free:
2178 kfree(ff_args);
2179out_nomem:
2180 return -ENOMEM;
2181}
2182
2183#ifdef CONFIG_NFS_V4_2
2184void
2185ff_layout_send_layouterror(struct pnfs_layout_segment *lseg)
2186{
2187 struct pnfs_layout_hdr *lo = lseg->pls_layout;
2188 struct nfs42_layout_error *errors;
2189 LIST_HEAD(head);
2190
2191 if (!nfs_server_capable(lo->plh_inode, NFS_CAP_LAYOUTERROR))
2192 return;
2193 ff_layout_fetch_ds_ioerr(lo, &lseg->pls_range, &head, -1);
2194 if (list_empty(&head))
2195 return;
2196
2197 errors = kmalloc_array(NFS42_LAYOUTERROR_MAX,
2198 sizeof(*errors), GFP_NOFS);
2199 if (errors != NULL) {
2200 const struct nfs4_ff_layout_ds_err *pos;
2201 size_t n = 0;
2202
2203 list_for_each_entry(pos, &head, list) {
2204 errors[n].offset = pos->offset;
2205 errors[n].length = pos->length;
2206 nfs4_stateid_copy(&errors[n].stateid, &pos->stateid);
2207 errors[n].errors[0].dev_id = pos->deviceid;
2208 errors[n].errors[0].status = pos->status;
2209 errors[n].errors[0].opnum = pos->opnum;
2210 n++;
2211 if (!list_is_last(&pos->list, &head) &&
2212 n < NFS42_LAYOUTERROR_MAX)
2213 continue;
2214 if (nfs42_proc_layouterror(lseg, errors, n) < 0)
2215 break;
2216 n = 0;
2217 }
2218 kfree(errors);
2219 }
2220 ff_layout_free_ds_ioerr(&head);
2221}
2222#else
2223void
2224ff_layout_send_layouterror(struct pnfs_layout_segment *lseg)
2225{
2226}
2227#endif
2228
2229static int
2230ff_layout_ntop4(const struct sockaddr *sap, char *buf, const size_t buflen)
2231{
2232 const struct sockaddr_in *sin = (struct sockaddr_in *)sap;
2233
2234 return snprintf(buf, buflen, "%pI4", &sin->sin_addr);
2235}
2236
2237static size_t
2238ff_layout_ntop6_noscopeid(const struct sockaddr *sap, char *buf,
2239 const int buflen)
2240{
2241 const struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)sap;
2242 const struct in6_addr *addr = &sin6->sin6_addr;
2243
2244
2245
2246
2247
2248
2249 if (ipv6_addr_any(addr))
2250 return snprintf(buf, buflen, "::");
2251
2252
2253
2254
2255
2256
2257 if (ipv6_addr_loopback(addr))
2258 return snprintf(buf, buflen, "::1");
2259
2260
2261
2262
2263
2264
2265
2266 if (ipv6_addr_v4mapped(addr))
2267 return snprintf(buf, buflen, "::ffff:%pI4",
2268 &addr->s6_addr32[3]);
2269
2270
2271
2272
2273 return snprintf(buf, buflen, "%pI6c", addr);
2274}
2275
2276
2277static void
2278ff_layout_encode_netaddr(struct xdr_stream *xdr, struct nfs4_pnfs_ds_addr *da)
2279{
2280 struct sockaddr *sap = (struct sockaddr *)&da->da_addr;
2281 char portbuf[RPCBIND_MAXUADDRPLEN];
2282 char addrbuf[RPCBIND_MAXUADDRLEN];
2283 unsigned short port;
2284 int len, netid_len;
2285 __be32 *p;
2286
2287 switch (sap->sa_family) {
2288 case AF_INET:
2289 if (ff_layout_ntop4(sap, addrbuf, sizeof(addrbuf)) == 0)
2290 return;
2291 port = ntohs(((struct sockaddr_in *)sap)->sin_port);
2292 break;
2293 case AF_INET6:
2294 if (ff_layout_ntop6_noscopeid(sap, addrbuf, sizeof(addrbuf)) == 0)
2295 return;
2296 port = ntohs(((struct sockaddr_in6 *)sap)->sin6_port);
2297 break;
2298 default:
2299 WARN_ON_ONCE(1);
2300 return;
2301 }
2302
2303 snprintf(portbuf, sizeof(portbuf), ".%u.%u", port >> 8, port & 0xff);
2304 len = strlcat(addrbuf, portbuf, sizeof(addrbuf));
2305
2306 netid_len = strlen(da->da_netid);
2307 p = xdr_reserve_space(xdr, 4 + netid_len);
2308 xdr_encode_opaque(p, da->da_netid, netid_len);
2309
2310 p = xdr_reserve_space(xdr, 4 + len);
2311 xdr_encode_opaque(p, addrbuf, len);
2312}
2313
2314static void
2315ff_layout_encode_nfstime(struct xdr_stream *xdr,
2316 ktime_t t)
2317{
2318 struct timespec64 ts;
2319 __be32 *p;
2320
2321 p = xdr_reserve_space(xdr, 12);
2322 ts = ktime_to_timespec64(t);
2323 p = xdr_encode_hyper(p, ts.tv_sec);
2324 *p++ = cpu_to_be32(ts.tv_nsec);
2325}
2326
2327static void
2328ff_layout_encode_io_latency(struct xdr_stream *xdr,
2329 struct nfs4_ff_io_stat *stat)
2330{
2331 __be32 *p;
2332
2333 p = xdr_reserve_space(xdr, 5 * 8);
2334 p = xdr_encode_hyper(p, stat->ops_requested);
2335 p = xdr_encode_hyper(p, stat->bytes_requested);
2336 p = xdr_encode_hyper(p, stat->ops_completed);
2337 p = xdr_encode_hyper(p, stat->bytes_completed);
2338 p = xdr_encode_hyper(p, stat->bytes_not_delivered);
2339 ff_layout_encode_nfstime(xdr, stat->total_busy_time);
2340 ff_layout_encode_nfstime(xdr, stat->aggregate_completion_time);
2341}
2342
2343static void
2344ff_layout_encode_ff_layoutupdate(struct xdr_stream *xdr,
2345 const struct nfs42_layoutstat_devinfo *devinfo,
2346 struct nfs4_ff_layout_mirror *mirror)
2347{
2348 struct nfs4_pnfs_ds_addr *da;
2349 struct nfs4_pnfs_ds *ds = mirror->mirror_ds->ds;
2350 struct nfs_fh *fh = &mirror->fh_versions[0];
2351 __be32 *p;
2352
2353 da = list_first_entry(&ds->ds_addrs, struct nfs4_pnfs_ds_addr, da_node);
2354 dprintk("%s: DS %s: encoding address %s\n",
2355 __func__, ds->ds_remotestr, da->da_remotestr);
2356
2357 ff_layout_encode_netaddr(xdr, da);
2358
2359 p = xdr_reserve_space(xdr, 4 + fh->size);
2360 xdr_encode_opaque(p, fh->data, fh->size);
2361
2362 spin_lock(&mirror->lock);
2363 ff_layout_encode_io_latency(xdr, &mirror->read_stat.io_stat);
2364
2365 ff_layout_encode_io_latency(xdr, &mirror->write_stat.io_stat);
2366 spin_unlock(&mirror->lock);
2367
2368 ff_layout_encode_nfstime(xdr, ktime_sub(ktime_get(), mirror->start_time));
2369
2370 p = xdr_reserve_space(xdr, 4);
2371 *p = cpu_to_be32(false);
2372}
2373
2374static void
2375ff_layout_encode_layoutstats(struct xdr_stream *xdr, const void *args,
2376 const struct nfs4_xdr_opaque_data *opaque)
2377{
2378 struct nfs42_layoutstat_devinfo *devinfo = container_of(opaque,
2379 struct nfs42_layoutstat_devinfo, ld_private);
2380 __be32 *start;
2381
2382
2383 start = xdr_reserve_space(xdr, 4);
2384 ff_layout_encode_ff_layoutupdate(xdr, devinfo, opaque->data);
2385
2386 *start = cpu_to_be32((xdr->p - start - 1) * 4);
2387}
2388
2389static void
2390ff_layout_free_layoutstats(struct nfs4_xdr_opaque_data *opaque)
2391{
2392 struct nfs4_ff_layout_mirror *mirror = opaque->data;
2393
2394 ff_layout_put_mirror(mirror);
2395}
2396
2397static const struct nfs4_xdr_opaque_ops layoutstat_ops = {
2398 .encode = ff_layout_encode_layoutstats,
2399 .free = ff_layout_free_layoutstats,
2400};
2401
2402static int
2403ff_layout_mirror_prepare_stats(struct pnfs_layout_hdr *lo,
2404 struct nfs42_layoutstat_devinfo *devinfo,
2405 int dev_limit)
2406{
2407 struct nfs4_flexfile_layout *ff_layout = FF_LAYOUT_FROM_HDR(lo);
2408 struct nfs4_ff_layout_mirror *mirror;
2409 struct nfs4_deviceid_node *dev;
2410 int i = 0;
2411
2412 list_for_each_entry(mirror, &ff_layout->mirrors, mirrors) {
2413 if (i >= dev_limit)
2414 break;
2415 if (IS_ERR_OR_NULL(mirror->mirror_ds))
2416 continue;
2417 if (!test_and_clear_bit(NFS4_FF_MIRROR_STAT_AVAIL, &mirror->flags))
2418 continue;
2419
2420 if (!refcount_inc_not_zero(&mirror->ref))
2421 continue;
2422 dev = &mirror->mirror_ds->id_node;
2423 memcpy(&devinfo->dev_id, &dev->deviceid, NFS4_DEVICEID4_SIZE);
2424 devinfo->offset = 0;
2425 devinfo->length = NFS4_MAX_UINT64;
2426 spin_lock(&mirror->lock);
2427 devinfo->read_count = mirror->read_stat.io_stat.ops_completed;
2428 devinfo->read_bytes = mirror->read_stat.io_stat.bytes_completed;
2429 devinfo->write_count = mirror->write_stat.io_stat.ops_completed;
2430 devinfo->write_bytes = mirror->write_stat.io_stat.bytes_completed;
2431 spin_unlock(&mirror->lock);
2432 devinfo->layout_type = LAYOUT_FLEX_FILES;
2433 devinfo->ld_private.ops = &layoutstat_ops;
2434 devinfo->ld_private.data = mirror;
2435
2436 devinfo++;
2437 i++;
2438 }
2439 return i;
2440}
2441
2442static int
2443ff_layout_prepare_layoutstats(struct nfs42_layoutstat_args *args)
2444{
2445 struct nfs4_flexfile_layout *ff_layout;
2446 const int dev_count = PNFS_LAYOUTSTATS_MAXDEV;
2447
2448
2449 args->devinfo = kmalloc_array(dev_count, sizeof(*args->devinfo), GFP_NOIO);
2450 if (!args->devinfo)
2451 return -ENOMEM;
2452
2453 spin_lock(&args->inode->i_lock);
2454 ff_layout = FF_LAYOUT_FROM_HDR(NFS_I(args->inode)->layout);
2455 args->num_dev = ff_layout_mirror_prepare_stats(&ff_layout->generic_hdr,
2456 &args->devinfo[0], dev_count);
2457 spin_unlock(&args->inode->i_lock);
2458 if (!args->num_dev) {
2459 kfree(args->devinfo);
2460 args->devinfo = NULL;
2461 return -ENOENT;
2462 }
2463
2464 return 0;
2465}
2466
2467static int
2468ff_layout_set_layoutdriver(struct nfs_server *server,
2469 const struct nfs_fh *dummy)
2470{
2471#if IS_ENABLED(CONFIG_NFS_V4_2)
2472 server->caps |= NFS_CAP_LAYOUTSTATS;
2473#endif
2474 return 0;
2475}
2476
2477static const struct pnfs_commit_ops ff_layout_commit_ops = {
2478 .setup_ds_info = ff_layout_setup_ds_info,
2479 .release_ds_info = ff_layout_release_ds_info,
2480 .mark_request_commit = pnfs_layout_mark_request_commit,
2481 .clear_request_commit = pnfs_generic_clear_request_commit,
2482 .scan_commit_lists = pnfs_generic_scan_commit_lists,
2483 .recover_commit_reqs = pnfs_generic_recover_commit_reqs,
2484 .commit_pagelist = ff_layout_commit_pagelist,
2485};
2486
2487static struct pnfs_layoutdriver_type flexfilelayout_type = {
2488 .id = LAYOUT_FLEX_FILES,
2489 .name = "LAYOUT_FLEX_FILES",
2490 .owner = THIS_MODULE,
2491 .flags = PNFS_LAYOUTGET_ON_OPEN,
2492 .max_layoutget_response = 4096,
2493 .set_layoutdriver = ff_layout_set_layoutdriver,
2494 .alloc_layout_hdr = ff_layout_alloc_layout_hdr,
2495 .free_layout_hdr = ff_layout_free_layout_hdr,
2496 .alloc_lseg = ff_layout_alloc_lseg,
2497 .free_lseg = ff_layout_free_lseg,
2498 .add_lseg = ff_layout_add_lseg,
2499 .pg_read_ops = &ff_layout_pg_read_ops,
2500 .pg_write_ops = &ff_layout_pg_write_ops,
2501 .get_ds_info = ff_layout_get_ds_info,
2502 .free_deviceid_node = ff_layout_free_deviceid_node,
2503 .read_pagelist = ff_layout_read_pagelist,
2504 .write_pagelist = ff_layout_write_pagelist,
2505 .alloc_deviceid_node = ff_layout_alloc_deviceid_node,
2506 .prepare_layoutreturn = ff_layout_prepare_layoutreturn,
2507 .sync = pnfs_nfs_generic_sync,
2508 .prepare_layoutstats = ff_layout_prepare_layoutstats,
2509};
2510
2511static int __init nfs4flexfilelayout_init(void)
2512{
2513 printk(KERN_INFO "%s: NFSv4 Flexfile Layout Driver Registering...\n",
2514 __func__);
2515 return pnfs_register_layoutdriver(&flexfilelayout_type);
2516}
2517
2518static void __exit nfs4flexfilelayout_exit(void)
2519{
2520 printk(KERN_INFO "%s: NFSv4 Flexfile Layout Driver Unregistering...\n",
2521 __func__);
2522 pnfs_unregister_layoutdriver(&flexfilelayout_type);
2523}
2524
2525MODULE_ALIAS("nfs-layouttype4-4");
2526
2527MODULE_LICENSE("GPL");
2528MODULE_DESCRIPTION("The NFSv4 flexfile layout driver");
2529
2530module_init(nfs4flexfilelayout_init);
2531module_exit(nfs4flexfilelayout_exit);
2532
2533module_param(io_maxretrans, ushort, 0644);
2534MODULE_PARM_DESC(io_maxretrans, "The number of times the NFSv4.1 client "
2535 "retries an I/O request before returning an error. ");
2536
