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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 > sizeof(struct nfs_fh)) {
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_buffer(&stream, page_address(scratch), PAGE_SIZE);
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 bool fail_return = false;
744 u32 idx;
745
746
747 for (idx = start_idx; idx < fls->mirror_array_cnt; idx++) {
748 if (idx+1 == fls->mirror_array_cnt)
749 fail_return = !check_device;
750
751 mirror = FF_LAYOUT_COMP(lseg, idx);
752 ds = nfs4_ff_layout_prepare_ds(lseg, mirror, fail_return);
753 if (!ds)
754 continue;
755
756 if (check_device &&
757 nfs4_test_deviceid_unavailable(&mirror->mirror_ds->id_node))
758 continue;
759
760 *best_idx = idx;
761 return ds;
762 }
763
764 return NULL;
765}
766
767static struct nfs4_pnfs_ds *
768ff_layout_choose_any_ds_for_read(struct pnfs_layout_segment *lseg,
769 u32 start_idx, u32 *best_idx)
770{
771 return ff_layout_choose_ds_for_read(lseg, start_idx, best_idx, false);
772}
773
774static struct nfs4_pnfs_ds *
775ff_layout_choose_valid_ds_for_read(struct pnfs_layout_segment *lseg,
776 u32 start_idx, u32 *best_idx)
777{
778 return ff_layout_choose_ds_for_read(lseg, start_idx, best_idx, true);
779}
780
781static struct nfs4_pnfs_ds *
782ff_layout_choose_best_ds_for_read(struct pnfs_layout_segment *lseg,
783 u32 start_idx, u32 *best_idx)
784{
785 struct nfs4_pnfs_ds *ds;
786
787 ds = ff_layout_choose_valid_ds_for_read(lseg, start_idx, best_idx);
788 if (ds)
789 return ds;
790 return ff_layout_choose_any_ds_for_read(lseg, start_idx, best_idx);
791}
792
793static struct nfs4_pnfs_ds *
794ff_layout_get_ds_for_read(struct nfs_pageio_descriptor *pgio,
795 u32 *best_idx)
796{
797 struct pnfs_layout_segment *lseg = pgio->pg_lseg;
798 struct nfs4_pnfs_ds *ds;
799
800 ds = ff_layout_choose_best_ds_for_read(lseg, pgio->pg_mirror_idx,
801 best_idx);
802 if (ds || !pgio->pg_mirror_idx)
803 return ds;
804 return ff_layout_choose_best_ds_for_read(lseg, 0, best_idx);
805}
806
807static void
808ff_layout_pg_get_read(struct nfs_pageio_descriptor *pgio,
809 struct nfs_page *req,
810 bool strict_iomode)
811{
812 pnfs_put_lseg(pgio->pg_lseg);
813 pgio->pg_lseg = pnfs_update_layout(pgio->pg_inode,
814 nfs_req_openctx(req),
815 req_offset(req),
816 req->wb_bytes,
817 IOMODE_READ,
818 strict_iomode,
819 GFP_KERNEL);
820 if (IS_ERR(pgio->pg_lseg)) {
821 pgio->pg_error = PTR_ERR(pgio->pg_lseg);
822 pgio->pg_lseg = NULL;
823 }
824}
825
826static void
827ff_layout_pg_check_layout(struct nfs_pageio_descriptor *pgio,
828 struct nfs_page *req)
829{
830 pnfs_generic_pg_check_layout(pgio);
831 pnfs_generic_pg_check_range(pgio, req);
832}
833
834static void
835ff_layout_pg_init_read(struct nfs_pageio_descriptor *pgio,
836 struct nfs_page *req)
837{
838 struct nfs_pgio_mirror *pgm;
839 struct nfs4_ff_layout_mirror *mirror;
840 struct nfs4_pnfs_ds *ds;
841 u32 ds_idx, i;
842
843retry:
844 ff_layout_pg_check_layout(pgio, req);
845
846 if (!pgio->pg_lseg) {
847 ff_layout_pg_get_read(pgio, req, false);
848 if (!pgio->pg_lseg)
849 goto out_nolseg;
850 }
851 if (ff_layout_avoid_read_on_rw(pgio->pg_lseg)) {
852 ff_layout_pg_get_read(pgio, req, true);
853 if (!pgio->pg_lseg)
854 goto out_nolseg;
855 }
856
857 ds = ff_layout_get_ds_for_read(pgio, &ds_idx);
858 if (!ds) {
859 if (!ff_layout_no_fallback_to_mds(pgio->pg_lseg))
860 goto out_mds;
861 pnfs_generic_pg_cleanup(pgio);
862
863 ssleep(1);
864 goto retry;
865 }
866
867 for (i = 0; i < pgio->pg_mirror_count; i++) {
868 mirror = FF_LAYOUT_COMP(pgio->pg_lseg, i);
869 pgm = &pgio->pg_mirrors[i];
870 pgm->pg_bsize = mirror->mirror_ds->ds_versions[0].rsize;
871 }
872
873 pgio->pg_mirror_idx = ds_idx;
874
875 if (NFS_SERVER(pgio->pg_inode)->flags &
876 (NFS_MOUNT_SOFT|NFS_MOUNT_SOFTERR))
877 pgio->pg_maxretrans = io_maxretrans;
878 return;
879out_nolseg:
880 if (pgio->pg_error < 0)
881 return;
882out_mds:
883 trace_pnfs_mds_fallback_pg_init_read(pgio->pg_inode,
884 0, NFS4_MAX_UINT64, IOMODE_READ,
885 NFS_I(pgio->pg_inode)->layout,
886 pgio->pg_lseg);
887 pgio->pg_maxretrans = 0;
888 nfs_pageio_reset_read_mds(pgio);
889}
890
891static void
892ff_layout_pg_init_write(struct nfs_pageio_descriptor *pgio,
893 struct nfs_page *req)
894{
895 struct nfs4_ff_layout_mirror *mirror;
896 struct nfs_pgio_mirror *pgm;
897 struct nfs4_pnfs_ds *ds;
898 u32 i;
899
900retry:
901 ff_layout_pg_check_layout(pgio, req);
902 if (!pgio->pg_lseg) {
903 pgio->pg_lseg = pnfs_update_layout(pgio->pg_inode,
904 nfs_req_openctx(req),
905 req_offset(req),
906 req->wb_bytes,
907 IOMODE_RW,
908 false,
909 GFP_NOFS);
910 if (IS_ERR(pgio->pg_lseg)) {
911 pgio->pg_error = PTR_ERR(pgio->pg_lseg);
912 pgio->pg_lseg = NULL;
913 return;
914 }
915 }
916
917 if (pgio->pg_lseg == NULL)
918 goto out_mds;
919
920
921 if (pgio->pg_mirror_count != FF_LAYOUT_MIRROR_COUNT(pgio->pg_lseg))
922 goto out_eagain;
923
924 for (i = 0; i < pgio->pg_mirror_count; i++) {
925 mirror = FF_LAYOUT_COMP(pgio->pg_lseg, i);
926 ds = nfs4_ff_layout_prepare_ds(pgio->pg_lseg, mirror, true);
927 if (!ds) {
928 if (!ff_layout_no_fallback_to_mds(pgio->pg_lseg))
929 goto out_mds;
930 pnfs_generic_pg_cleanup(pgio);
931
932 ssleep(1);
933 goto retry;
934 }
935 pgm = &pgio->pg_mirrors[i];
936 pgm->pg_bsize = mirror->mirror_ds->ds_versions[0].wsize;
937 }
938
939 if (NFS_SERVER(pgio->pg_inode)->flags &
940 (NFS_MOUNT_SOFT|NFS_MOUNT_SOFTERR))
941 pgio->pg_maxretrans = io_maxretrans;
942 return;
943out_eagain:
944 pnfs_generic_pg_cleanup(pgio);
945 pgio->pg_error = -EAGAIN;
946 return;
947out_mds:
948 trace_pnfs_mds_fallback_pg_init_write(pgio->pg_inode,
949 0, NFS4_MAX_UINT64, IOMODE_RW,
950 NFS_I(pgio->pg_inode)->layout,
951 pgio->pg_lseg);
952 pgio->pg_maxretrans = 0;
953 nfs_pageio_reset_write_mds(pgio);
954 pgio->pg_error = -EAGAIN;
955}
956
957static unsigned int
958ff_layout_pg_get_mirror_count_write(struct nfs_pageio_descriptor *pgio,
959 struct nfs_page *req)
960{
961 if (!pgio->pg_lseg) {
962 pgio->pg_lseg = pnfs_update_layout(pgio->pg_inode,
963 nfs_req_openctx(req),
964 req_offset(req),
965 req->wb_bytes,
966 IOMODE_RW,
967 false,
968 GFP_NOFS);
969 if (IS_ERR(pgio->pg_lseg)) {
970 pgio->pg_error = PTR_ERR(pgio->pg_lseg);
971 pgio->pg_lseg = NULL;
972 goto out;
973 }
974 }
975 if (pgio->pg_lseg)
976 return FF_LAYOUT_MIRROR_COUNT(pgio->pg_lseg);
977
978 trace_pnfs_mds_fallback_pg_get_mirror_count(pgio->pg_inode,
979 0, NFS4_MAX_UINT64, IOMODE_RW,
980 NFS_I(pgio->pg_inode)->layout,
981 pgio->pg_lseg);
982
983 nfs_pageio_reset_write_mds(pgio);
984out:
985 return 1;
986}
987
988static const struct nfs_pageio_ops ff_layout_pg_read_ops = {
989 .pg_init = ff_layout_pg_init_read,
990 .pg_test = pnfs_generic_pg_test,
991 .pg_doio = pnfs_generic_pg_readpages,
992 .pg_cleanup = pnfs_generic_pg_cleanup,
993};
994
995static const struct nfs_pageio_ops ff_layout_pg_write_ops = {
996 .pg_init = ff_layout_pg_init_write,
997 .pg_test = pnfs_generic_pg_test,
998 .pg_doio = pnfs_generic_pg_writepages,
999 .pg_get_mirror_count = ff_layout_pg_get_mirror_count_write,
1000 .pg_cleanup = pnfs_generic_pg_cleanup,
1001};
1002
1003static void ff_layout_reset_write(struct nfs_pgio_header *hdr, bool retry_pnfs)
1004{
1005 struct rpc_task *task = &hdr->task;
1006
1007 pnfs_layoutcommit_inode(hdr->inode, false);
1008
1009 if (retry_pnfs) {
1010 dprintk("%s Reset task %5u for i/o through pNFS "
1011 "(req %s/%llu, %u bytes @ offset %llu)\n", __func__,
1012 hdr->task.tk_pid,
1013 hdr->inode->i_sb->s_id,
1014 (unsigned long long)NFS_FILEID(hdr->inode),
1015 hdr->args.count,
1016 (unsigned long long)hdr->args.offset);
1017
1018 hdr->completion_ops->reschedule_io(hdr);
1019 return;
1020 }
1021
1022 if (!test_and_set_bit(NFS_IOHDR_REDO, &hdr->flags)) {
1023 dprintk("%s Reset task %5u for i/o through MDS "
1024 "(req %s/%llu, %u bytes @ offset %llu)\n", __func__,
1025 hdr->task.tk_pid,
1026 hdr->inode->i_sb->s_id,
1027 (unsigned long long)NFS_FILEID(hdr->inode),
1028 hdr->args.count,
1029 (unsigned long long)hdr->args.offset);
1030
1031 trace_pnfs_mds_fallback_write_done(hdr->inode,
1032 hdr->args.offset, hdr->args.count,
1033 IOMODE_RW, NFS_I(hdr->inode)->layout,
1034 hdr->lseg);
1035 task->tk_status = pnfs_write_done_resend_to_mds(hdr);
1036 }
1037}
1038
1039static void ff_layout_resend_pnfs_read(struct nfs_pgio_header *hdr)
1040{
1041 u32 idx = hdr->pgio_mirror_idx + 1;
1042 u32 new_idx = 0;
1043
1044 if (ff_layout_choose_any_ds_for_read(hdr->lseg, idx + 1, &new_idx))
1045 ff_layout_send_layouterror(hdr->lseg);
1046 else
1047 pnfs_error_mark_layout_for_return(hdr->inode, hdr->lseg);
1048 pnfs_read_resend_pnfs(hdr, new_idx);
1049}
1050
1051static void ff_layout_reset_read(struct nfs_pgio_header *hdr)
1052{
1053 struct rpc_task *task = &hdr->task;
1054
1055 pnfs_layoutcommit_inode(hdr->inode, false);
1056 pnfs_error_mark_layout_for_return(hdr->inode, hdr->lseg);
1057
1058 if (!test_and_set_bit(NFS_IOHDR_REDO, &hdr->flags)) {
1059 dprintk("%s Reset task %5u for i/o through MDS "
1060 "(req %s/%llu, %u bytes @ offset %llu)\n", __func__,
1061 hdr->task.tk_pid,
1062 hdr->inode->i_sb->s_id,
1063 (unsigned long long)NFS_FILEID(hdr->inode),
1064 hdr->args.count,
1065 (unsigned long long)hdr->args.offset);
1066
1067 trace_pnfs_mds_fallback_read_done(hdr->inode,
1068 hdr->args.offset, hdr->args.count,
1069 IOMODE_READ, NFS_I(hdr->inode)->layout,
1070 hdr->lseg);
1071 task->tk_status = pnfs_read_done_resend_to_mds(hdr);
1072 }
1073}
1074
1075static int ff_layout_async_handle_error_v4(struct rpc_task *task,
1076 struct nfs4_state *state,
1077 struct nfs_client *clp,
1078 struct pnfs_layout_segment *lseg,
1079 u32 idx)
1080{
1081 struct pnfs_layout_hdr *lo = lseg->pls_layout;
1082 struct inode *inode = lo->plh_inode;
1083 struct nfs4_deviceid_node *devid = FF_LAYOUT_DEVID_NODE(lseg, idx);
1084 struct nfs4_slot_table *tbl = &clp->cl_session->fc_slot_table;
1085
1086 switch (task->tk_status) {
1087 case -NFS4ERR_BADSESSION:
1088 case -NFS4ERR_BADSLOT:
1089 case -NFS4ERR_BAD_HIGH_SLOT:
1090 case -NFS4ERR_DEADSESSION:
1091 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
1092 case -NFS4ERR_SEQ_FALSE_RETRY:
1093 case -NFS4ERR_SEQ_MISORDERED:
1094 dprintk("%s ERROR %d, Reset session. Exchangeid "
1095 "flags 0x%x\n", __func__, task->tk_status,
1096 clp->cl_exchange_flags);
1097 nfs4_schedule_session_recovery(clp->cl_session, task->tk_status);
1098 break;
1099 case -NFS4ERR_DELAY:
1100 case -NFS4ERR_GRACE:
1101 rpc_delay(task, FF_LAYOUT_POLL_RETRY_MAX);
1102 break;
1103 case -NFS4ERR_RETRY_UNCACHED_REP:
1104 break;
1105
1106 case -NFS4ERR_PNFS_NO_LAYOUT:
1107 case -ESTALE:
1108 case -EBADHANDLE:
1109 case -EISDIR:
1110 case -NFS4ERR_FHEXPIRED:
1111 case -NFS4ERR_WRONG_TYPE:
1112 dprintk("%s Invalid layout error %d\n", __func__,
1113 task->tk_status);
1114
1115
1116
1117
1118
1119
1120
1121 pnfs_destroy_layout(NFS_I(inode));
1122 rpc_wake_up(&tbl->slot_tbl_waitq);
1123 goto reset;
1124
1125 case -ECONNREFUSED:
1126 case -EHOSTDOWN:
1127 case -EHOSTUNREACH:
1128 case -ENETUNREACH:
1129 case -EIO:
1130 case -ETIMEDOUT:
1131 case -EPIPE:
1132 dprintk("%s DS connection error %d\n", __func__,
1133 task->tk_status);
1134 nfs4_delete_deviceid(devid->ld, devid->nfs_client,
1135 &devid->deviceid);
1136 rpc_wake_up(&tbl->slot_tbl_waitq);
1137 fallthrough;
1138 default:
1139 if (ff_layout_avoid_mds_available_ds(lseg))
1140 return -NFS4ERR_RESET_TO_PNFS;
1141reset:
1142 dprintk("%s Retry through MDS. Error %d\n", __func__,
1143 task->tk_status);
1144 return -NFS4ERR_RESET_TO_MDS;
1145 }
1146 task->tk_status = 0;
1147 return -EAGAIN;
1148}
1149
1150
1151static int ff_layout_async_handle_error_v3(struct rpc_task *task,
1152 struct pnfs_layout_segment *lseg,
1153 u32 idx)
1154{
1155 struct nfs4_deviceid_node *devid = FF_LAYOUT_DEVID_NODE(lseg, idx);
1156
1157 switch (task->tk_status) {
1158
1159 case -EACCES:
1160 case -ESTALE:
1161 case -EISDIR:
1162 case -EBADHANDLE:
1163 case -ELOOP:
1164 case -ENOSPC:
1165 break;
1166 case -EJUKEBOX:
1167 nfs_inc_stats(lseg->pls_layout->plh_inode, NFSIOS_DELAY);
1168 goto out_retry;
1169 default:
1170 dprintk("%s DS connection error %d\n", __func__,
1171 task->tk_status);
1172 nfs4_delete_deviceid(devid->ld, devid->nfs_client,
1173 &devid->deviceid);
1174 }
1175
1176 return -NFS4ERR_RESET_TO_PNFS;
1177out_retry:
1178 task->tk_status = 0;
1179 rpc_restart_call_prepare(task);
1180 rpc_delay(task, NFS_JUKEBOX_RETRY_TIME);
1181 return -EAGAIN;
1182}
1183
1184static int ff_layout_async_handle_error(struct rpc_task *task,
1185 struct nfs4_state *state,
1186 struct nfs_client *clp,
1187 struct pnfs_layout_segment *lseg,
1188 u32 idx)
1189{
1190 int vers = clp->cl_nfs_mod->rpc_vers->number;
1191
1192 if (task->tk_status >= 0) {
1193 ff_layout_mark_ds_reachable(lseg, idx);
1194 return 0;
1195 }
1196
1197
1198 if (!pnfs_is_valid_lseg(lseg))
1199 return -NFS4ERR_RESET_TO_PNFS;
1200
1201 switch (vers) {
1202 case 3:
1203 return ff_layout_async_handle_error_v3(task, lseg, idx);
1204 case 4:
1205 return ff_layout_async_handle_error_v4(task, state, clp,
1206 lseg, idx);
1207 default:
1208
1209 WARN_ON_ONCE(1);
1210 return 0;
1211 }
1212}
1213
1214static void ff_layout_io_track_ds_error(struct pnfs_layout_segment *lseg,
1215 u32 idx, u64 offset, u64 length,
1216 u32 *op_status, int opnum, int error)
1217{
1218 struct nfs4_ff_layout_mirror *mirror;
1219 u32 status = *op_status;
1220 int err;
1221
1222 if (status == 0) {
1223 switch (error) {
1224 case -ETIMEDOUT:
1225 case -EPFNOSUPPORT:
1226 case -EPROTONOSUPPORT:
1227 case -EOPNOTSUPP:
1228 case -ECONNREFUSED:
1229 case -ECONNRESET:
1230 case -EHOSTDOWN:
1231 case -EHOSTUNREACH:
1232 case -ENETUNREACH:
1233 case -EADDRINUSE:
1234 case -ENOBUFS:
1235 case -EPIPE:
1236 case -EPERM:
1237 *op_status = status = NFS4ERR_NXIO;
1238 break;
1239 case -EACCES:
1240 *op_status = status = NFS4ERR_ACCESS;
1241 break;
1242 default:
1243 return;
1244 }
1245 }
1246
1247 mirror = FF_LAYOUT_COMP(lseg, idx);
1248 err = ff_layout_track_ds_error(FF_LAYOUT_FROM_HDR(lseg->pls_layout),
1249 mirror, offset, length, status, opnum,
1250 GFP_NOIO);
1251
1252 switch (status) {
1253 case NFS4ERR_DELAY:
1254 case NFS4ERR_GRACE:
1255 break;
1256 case NFS4ERR_NXIO:
1257 ff_layout_mark_ds_unreachable(lseg, idx);
1258
1259
1260
1261
1262 if (opnum == OP_READ)
1263 break;
1264 fallthrough;
1265 default:
1266 pnfs_error_mark_layout_for_return(lseg->pls_layout->plh_inode,
1267 lseg);
1268 }
1269
1270 dprintk("%s: err %d op %d status %u\n", __func__, err, opnum, status);
1271}
1272
1273
1274static int ff_layout_read_done_cb(struct rpc_task *task,
1275 struct nfs_pgio_header *hdr)
1276{
1277 int err;
1278
1279 if (task->tk_status < 0) {
1280 ff_layout_io_track_ds_error(hdr->lseg, hdr->pgio_mirror_idx,
1281 hdr->args.offset, hdr->args.count,
1282 &hdr->res.op_status, OP_READ,
1283 task->tk_status);
1284 trace_ff_layout_read_error(hdr);
1285 }
1286
1287 err = ff_layout_async_handle_error(task, hdr->args.context->state,
1288 hdr->ds_clp, hdr->lseg,
1289 hdr->pgio_mirror_idx);
1290
1291 trace_nfs4_pnfs_read(hdr, err);
1292 clear_bit(NFS_IOHDR_RESEND_PNFS, &hdr->flags);
1293 clear_bit(NFS_IOHDR_RESEND_MDS, &hdr->flags);
1294 switch (err) {
1295 case -NFS4ERR_RESET_TO_PNFS:
1296 set_bit(NFS_IOHDR_RESEND_PNFS, &hdr->flags);
1297 return task->tk_status;
1298 case -NFS4ERR_RESET_TO_MDS:
1299 set_bit(NFS_IOHDR_RESEND_MDS, &hdr->flags);
1300 return task->tk_status;
1301 case -EAGAIN:
1302 goto out_eagain;
1303 }
1304
1305 return 0;
1306out_eagain:
1307 rpc_restart_call_prepare(task);
1308 return -EAGAIN;
1309}
1310
1311static bool
1312ff_layout_need_layoutcommit(struct pnfs_layout_segment *lseg)
1313{
1314 return !(FF_LAYOUT_LSEG(lseg)->flags & FF_FLAGS_NO_LAYOUTCOMMIT);
1315}
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326static void
1327ff_layout_set_layoutcommit(struct inode *inode,
1328 struct pnfs_layout_segment *lseg,
1329 loff_t end_offset)
1330{
1331 if (!ff_layout_need_layoutcommit(lseg))
1332 return;
1333
1334 pnfs_set_layoutcommit(inode, lseg, end_offset);
1335 dprintk("%s inode %lu pls_end_pos %llu\n", __func__, inode->i_ino,
1336 (unsigned long long) NFS_I(inode)->layout->plh_lwb);
1337}
1338
1339static void ff_layout_read_record_layoutstats_start(struct rpc_task *task,
1340 struct nfs_pgio_header *hdr)
1341{
1342 if (test_and_set_bit(NFS_IOHDR_STAT, &hdr->flags))
1343 return;
1344 nfs4_ff_layout_stat_io_start_read(hdr->inode,
1345 FF_LAYOUT_COMP(hdr->lseg, hdr->pgio_mirror_idx),
1346 hdr->args.count,
1347 task->tk_start);
1348}
1349
1350static void ff_layout_read_record_layoutstats_done(struct rpc_task *task,
1351 struct nfs_pgio_header *hdr)
1352{
1353 if (!test_and_clear_bit(NFS_IOHDR_STAT, &hdr->flags))
1354 return;
1355 nfs4_ff_layout_stat_io_end_read(task,
1356 FF_LAYOUT_COMP(hdr->lseg, hdr->pgio_mirror_idx),
1357 hdr->args.count,
1358 hdr->res.count);
1359 set_bit(NFS_LSEG_LAYOUTRETURN, &hdr->lseg->pls_flags);
1360}
1361
1362static int ff_layout_read_prepare_common(struct rpc_task *task,
1363 struct nfs_pgio_header *hdr)
1364{
1365 if (unlikely(test_bit(NFS_CONTEXT_BAD, &hdr->args.context->flags))) {
1366 rpc_exit(task, -EIO);
1367 return -EIO;
1368 }
1369
1370 ff_layout_read_record_layoutstats_start(task, hdr);
1371 return 0;
1372}
1373
1374
1375
1376
1377
1378
1379static void ff_layout_read_prepare_v3(struct rpc_task *task, void *data)
1380{
1381 struct nfs_pgio_header *hdr = data;
1382
1383 if (ff_layout_read_prepare_common(task, hdr))
1384 return;
1385
1386 rpc_call_start(task);
1387}
1388
1389static void ff_layout_read_prepare_v4(struct rpc_task *task, void *data)
1390{
1391 struct nfs_pgio_header *hdr = data;
1392
1393 if (nfs4_setup_sequence(hdr->ds_clp,
1394 &hdr->args.seq_args,
1395 &hdr->res.seq_res,
1396 task))
1397 return;
1398
1399 ff_layout_read_prepare_common(task, hdr);
1400}
1401
1402static void ff_layout_read_call_done(struct rpc_task *task, void *data)
1403{
1404 struct nfs_pgio_header *hdr = data;
1405
1406 dprintk("--> %s task->tk_status %d\n", __func__, task->tk_status);
1407
1408 if (test_bit(NFS_IOHDR_REDO, &hdr->flags) &&
1409 task->tk_status == 0) {
1410 nfs4_sequence_done(task, &hdr->res.seq_res);
1411 return;
1412 }
1413
1414
1415 hdr->mds_ops->rpc_call_done(task, hdr);
1416}
1417
1418static void ff_layout_read_count_stats(struct rpc_task *task, void *data)
1419{
1420 struct nfs_pgio_header *hdr = data;
1421
1422 ff_layout_read_record_layoutstats_done(task, hdr);
1423 rpc_count_iostats_metrics(task,
1424 &NFS_CLIENT(hdr->inode)->cl_metrics[NFSPROC4_CLNT_READ]);
1425}
1426
1427static void ff_layout_read_release(void *data)
1428{
1429 struct nfs_pgio_header *hdr = data;
1430
1431 ff_layout_read_record_layoutstats_done(&hdr->task, hdr);
1432 if (test_bit(NFS_IOHDR_RESEND_PNFS, &hdr->flags))
1433 ff_layout_resend_pnfs_read(hdr);
1434 else if (test_bit(NFS_IOHDR_RESEND_MDS, &hdr->flags))
1435 ff_layout_reset_read(hdr);
1436 pnfs_generic_rw_release(data);
1437}
1438
1439
1440static int ff_layout_write_done_cb(struct rpc_task *task,
1441 struct nfs_pgio_header *hdr)
1442{
1443 loff_t end_offs = 0;
1444 int err;
1445
1446 if (task->tk_status < 0) {
1447 ff_layout_io_track_ds_error(hdr->lseg, hdr->pgio_mirror_idx,
1448 hdr->args.offset, hdr->args.count,
1449 &hdr->res.op_status, OP_WRITE,
1450 task->tk_status);
1451 trace_ff_layout_write_error(hdr);
1452 }
1453
1454 err = ff_layout_async_handle_error(task, hdr->args.context->state,
1455 hdr->ds_clp, hdr->lseg,
1456 hdr->pgio_mirror_idx);
1457
1458 trace_nfs4_pnfs_write(hdr, err);
1459 clear_bit(NFS_IOHDR_RESEND_PNFS, &hdr->flags);
1460 clear_bit(NFS_IOHDR_RESEND_MDS, &hdr->flags);
1461 switch (err) {
1462 case -NFS4ERR_RESET_TO_PNFS:
1463 set_bit(NFS_IOHDR_RESEND_PNFS, &hdr->flags);
1464 return task->tk_status;
1465 case -NFS4ERR_RESET_TO_MDS:
1466 set_bit(NFS_IOHDR_RESEND_MDS, &hdr->flags);
1467 return task->tk_status;
1468 case -EAGAIN:
1469 return -EAGAIN;
1470 }
1471
1472 if (hdr->res.verf->committed == NFS_FILE_SYNC ||
1473 hdr->res.verf->committed == NFS_DATA_SYNC)
1474 end_offs = hdr->mds_offset + (loff_t)hdr->res.count;
1475
1476
1477 ff_layout_set_layoutcommit(hdr->inode, hdr->lseg, end_offs);
1478
1479
1480 hdr->fattr.valid = 0;
1481 if (task->tk_status >= 0)
1482 nfs_writeback_update_inode(hdr);
1483
1484 return 0;
1485}
1486
1487static int ff_layout_commit_done_cb(struct rpc_task *task,
1488 struct nfs_commit_data *data)
1489{
1490 int err;
1491
1492 if (task->tk_status < 0) {
1493 ff_layout_io_track_ds_error(data->lseg, data->ds_commit_index,
1494 data->args.offset, data->args.count,
1495 &data->res.op_status, OP_COMMIT,
1496 task->tk_status);
1497 trace_ff_layout_commit_error(data);
1498 }
1499
1500 err = ff_layout_async_handle_error(task, NULL, data->ds_clp,
1501 data->lseg, data->ds_commit_index);
1502
1503 trace_nfs4_pnfs_commit_ds(data, err);
1504 switch (err) {
1505 case -NFS4ERR_RESET_TO_PNFS:
1506 pnfs_generic_prepare_to_resend_writes(data);
1507 return -EAGAIN;
1508 case -NFS4ERR_RESET_TO_MDS:
1509 pnfs_generic_prepare_to_resend_writes(data);
1510 return -EAGAIN;
1511 case -EAGAIN:
1512 rpc_restart_call_prepare(task);
1513 return -EAGAIN;
1514 }
1515
1516 ff_layout_set_layoutcommit(data->inode, data->lseg, data->lwb);
1517
1518 return 0;
1519}
1520
1521static void ff_layout_write_record_layoutstats_start(struct rpc_task *task,
1522 struct nfs_pgio_header *hdr)
1523{
1524 if (test_and_set_bit(NFS_IOHDR_STAT, &hdr->flags))
1525 return;
1526 nfs4_ff_layout_stat_io_start_write(hdr->inode,
1527 FF_LAYOUT_COMP(hdr->lseg, hdr->pgio_mirror_idx),
1528 hdr->args.count,
1529 task->tk_start);
1530}
1531
1532static void ff_layout_write_record_layoutstats_done(struct rpc_task *task,
1533 struct nfs_pgio_header *hdr)
1534{
1535 if (!test_and_clear_bit(NFS_IOHDR_STAT, &hdr->flags))
1536 return;
1537 nfs4_ff_layout_stat_io_end_write(task,
1538 FF_LAYOUT_COMP(hdr->lseg, hdr->pgio_mirror_idx),
1539 hdr->args.count, hdr->res.count,
1540 hdr->res.verf->committed);
1541 set_bit(NFS_LSEG_LAYOUTRETURN, &hdr->lseg->pls_flags);
1542}
1543
1544static int ff_layout_write_prepare_common(struct rpc_task *task,
1545 struct nfs_pgio_header *hdr)
1546{
1547 if (unlikely(test_bit(NFS_CONTEXT_BAD, &hdr->args.context->flags))) {
1548 rpc_exit(task, -EIO);
1549 return -EIO;
1550 }
1551
1552 ff_layout_write_record_layoutstats_start(task, hdr);
1553 return 0;
1554}
1555
1556static void ff_layout_write_prepare_v3(struct rpc_task *task, void *data)
1557{
1558 struct nfs_pgio_header *hdr = data;
1559
1560 if (ff_layout_write_prepare_common(task, hdr))
1561 return;
1562
1563 rpc_call_start(task);
1564}
1565
1566static void ff_layout_write_prepare_v4(struct rpc_task *task, void *data)
1567{
1568 struct nfs_pgio_header *hdr = data;
1569
1570 if (nfs4_setup_sequence(hdr->ds_clp,
1571 &hdr->args.seq_args,
1572 &hdr->res.seq_res,
1573 task))
1574 return;
1575
1576 ff_layout_write_prepare_common(task, hdr);
1577}
1578
1579static void ff_layout_write_call_done(struct rpc_task *task, void *data)
1580{
1581 struct nfs_pgio_header *hdr = data;
1582
1583 if (test_bit(NFS_IOHDR_REDO, &hdr->flags) &&
1584 task->tk_status == 0) {
1585 nfs4_sequence_done(task, &hdr->res.seq_res);
1586 return;
1587 }
1588
1589
1590 hdr->mds_ops->rpc_call_done(task, hdr);
1591}
1592
1593static void ff_layout_write_count_stats(struct rpc_task *task, void *data)
1594{
1595 struct nfs_pgio_header *hdr = data;
1596
1597 ff_layout_write_record_layoutstats_done(task, hdr);
1598 rpc_count_iostats_metrics(task,
1599 &NFS_CLIENT(hdr->inode)->cl_metrics[NFSPROC4_CLNT_WRITE]);
1600}
1601
1602static void ff_layout_write_release(void *data)
1603{
1604 struct nfs_pgio_header *hdr = data;
1605
1606 ff_layout_write_record_layoutstats_done(&hdr->task, hdr);
1607 if (test_bit(NFS_IOHDR_RESEND_PNFS, &hdr->flags)) {
1608 ff_layout_send_layouterror(hdr->lseg);
1609 ff_layout_reset_write(hdr, true);
1610 } else if (test_bit(NFS_IOHDR_RESEND_MDS, &hdr->flags))
1611 ff_layout_reset_write(hdr, false);
1612 pnfs_generic_rw_release(data);
1613}
1614
1615static void ff_layout_commit_record_layoutstats_start(struct rpc_task *task,
1616 struct nfs_commit_data *cdata)
1617{
1618 if (test_and_set_bit(NFS_IOHDR_STAT, &cdata->flags))
1619 return;
1620 nfs4_ff_layout_stat_io_start_write(cdata->inode,
1621 FF_LAYOUT_COMP(cdata->lseg, cdata->ds_commit_index),
1622 0, task->tk_start);
1623}
1624
1625static void ff_layout_commit_record_layoutstats_done(struct rpc_task *task,
1626 struct nfs_commit_data *cdata)
1627{
1628 struct nfs_page *req;
1629 __u64 count = 0;
1630
1631 if (!test_and_clear_bit(NFS_IOHDR_STAT, &cdata->flags))
1632 return;
1633
1634 if (task->tk_status == 0) {
1635 list_for_each_entry(req, &cdata->pages, wb_list)
1636 count += req->wb_bytes;
1637 }
1638 nfs4_ff_layout_stat_io_end_write(task,
1639 FF_LAYOUT_COMP(cdata->lseg, cdata->ds_commit_index),
1640 count, count, NFS_FILE_SYNC);
1641 set_bit(NFS_LSEG_LAYOUTRETURN, &cdata->lseg->pls_flags);
1642}
1643
1644static void ff_layout_commit_prepare_common(struct rpc_task *task,
1645 struct nfs_commit_data *cdata)
1646{
1647 ff_layout_commit_record_layoutstats_start(task, cdata);
1648}
1649
1650static void ff_layout_commit_prepare_v3(struct rpc_task *task, void *data)
1651{
1652 ff_layout_commit_prepare_common(task, data);
1653 rpc_call_start(task);
1654}
1655
1656static void ff_layout_commit_prepare_v4(struct rpc_task *task, void *data)
1657{
1658 struct nfs_commit_data *wdata = data;
1659
1660 if (nfs4_setup_sequence(wdata->ds_clp,
1661 &wdata->args.seq_args,
1662 &wdata->res.seq_res,
1663 task))
1664 return;
1665 ff_layout_commit_prepare_common(task, data);
1666}
1667
1668static void ff_layout_commit_done(struct rpc_task *task, void *data)
1669{
1670 pnfs_generic_write_commit_done(task, data);
1671}
1672
1673static void ff_layout_commit_count_stats(struct rpc_task *task, void *data)
1674{
1675 struct nfs_commit_data *cdata = data;
1676
1677 ff_layout_commit_record_layoutstats_done(task, cdata);
1678 rpc_count_iostats_metrics(task,
1679 &NFS_CLIENT(cdata->inode)->cl_metrics[NFSPROC4_CLNT_COMMIT]);
1680}
1681
1682static void ff_layout_commit_release(void *data)
1683{
1684 struct nfs_commit_data *cdata = data;
1685
1686 ff_layout_commit_record_layoutstats_done(&cdata->task, cdata);
1687 pnfs_generic_commit_release(data);
1688}
1689
1690static const struct rpc_call_ops ff_layout_read_call_ops_v3 = {
1691 .rpc_call_prepare = ff_layout_read_prepare_v3,
1692 .rpc_call_done = ff_layout_read_call_done,
1693 .rpc_count_stats = ff_layout_read_count_stats,
1694 .rpc_release = ff_layout_read_release,
1695};
1696
1697static const struct rpc_call_ops ff_layout_read_call_ops_v4 = {
1698 .rpc_call_prepare = ff_layout_read_prepare_v4,
1699 .rpc_call_done = ff_layout_read_call_done,
1700 .rpc_count_stats = ff_layout_read_count_stats,
1701 .rpc_release = ff_layout_read_release,
1702};
1703
1704static const struct rpc_call_ops ff_layout_write_call_ops_v3 = {
1705 .rpc_call_prepare = ff_layout_write_prepare_v3,
1706 .rpc_call_done = ff_layout_write_call_done,
1707 .rpc_count_stats = ff_layout_write_count_stats,
1708 .rpc_release = ff_layout_write_release,
1709};
1710
1711static const struct rpc_call_ops ff_layout_write_call_ops_v4 = {
1712 .rpc_call_prepare = ff_layout_write_prepare_v4,
1713 .rpc_call_done = ff_layout_write_call_done,
1714 .rpc_count_stats = ff_layout_write_count_stats,
1715 .rpc_release = ff_layout_write_release,
1716};
1717
1718static const struct rpc_call_ops ff_layout_commit_call_ops_v3 = {
1719 .rpc_call_prepare = ff_layout_commit_prepare_v3,
1720 .rpc_call_done = ff_layout_commit_done,
1721 .rpc_count_stats = ff_layout_commit_count_stats,
1722 .rpc_release = ff_layout_commit_release,
1723};
1724
1725static const struct rpc_call_ops ff_layout_commit_call_ops_v4 = {
1726 .rpc_call_prepare = ff_layout_commit_prepare_v4,
1727 .rpc_call_done = ff_layout_commit_done,
1728 .rpc_count_stats = ff_layout_commit_count_stats,
1729 .rpc_release = ff_layout_commit_release,
1730};
1731
1732static enum pnfs_try_status
1733ff_layout_read_pagelist(struct nfs_pgio_header *hdr)
1734{
1735 struct pnfs_layout_segment *lseg = hdr->lseg;
1736 struct nfs4_pnfs_ds *ds;
1737 struct rpc_clnt *ds_clnt;
1738 struct nfs4_ff_layout_mirror *mirror;
1739 const struct cred *ds_cred;
1740 loff_t offset = hdr->args.offset;
1741 u32 idx = hdr->pgio_mirror_idx;
1742 int vers;
1743 struct nfs_fh *fh;
1744
1745 dprintk("--> %s ino %lu pgbase %u req %zu@%llu\n",
1746 __func__, hdr->inode->i_ino,
1747 hdr->args.pgbase, (size_t)hdr->args.count, offset);
1748
1749 mirror = FF_LAYOUT_COMP(lseg, idx);
1750 ds = nfs4_ff_layout_prepare_ds(lseg, mirror, false);
1751 if (!ds)
1752 goto out_failed;
1753
1754 ds_clnt = nfs4_ff_find_or_create_ds_client(mirror, ds->ds_clp,
1755 hdr->inode);
1756 if (IS_ERR(ds_clnt))
1757 goto out_failed;
1758
1759 ds_cred = ff_layout_get_ds_cred(mirror, &lseg->pls_range, hdr->cred);
1760 if (!ds_cred)
1761 goto out_failed;
1762
1763 vers = nfs4_ff_layout_ds_version(mirror);
1764
1765 dprintk("%s USE DS: %s cl_count %d vers %d\n", __func__,
1766 ds->ds_remotestr, refcount_read(&ds->ds_clp->cl_count), vers);
1767
1768 hdr->pgio_done_cb = ff_layout_read_done_cb;
1769 refcount_inc(&ds->ds_clp->cl_count);
1770 hdr->ds_clp = ds->ds_clp;
1771 fh = nfs4_ff_layout_select_ds_fh(mirror);
1772 if (fh)
1773 hdr->args.fh = fh;
1774
1775 nfs4_ff_layout_select_ds_stateid(mirror, &hdr->args.stateid);
1776
1777
1778
1779
1780
1781 hdr->args.offset = offset;
1782 hdr->mds_offset = offset;
1783
1784
1785 nfs_initiate_pgio(ds_clnt, hdr, ds_cred, ds->ds_clp->rpc_ops,
1786 vers == 3 ? &ff_layout_read_call_ops_v3 :
1787 &ff_layout_read_call_ops_v4,
1788 0, RPC_TASK_SOFTCONN);
1789 put_cred(ds_cred);
1790 return PNFS_ATTEMPTED;
1791
1792out_failed:
1793 if (ff_layout_avoid_mds_available_ds(lseg))
1794 return PNFS_TRY_AGAIN;
1795 trace_pnfs_mds_fallback_read_pagelist(hdr->inode,
1796 hdr->args.offset, hdr->args.count,
1797 IOMODE_READ, NFS_I(hdr->inode)->layout, lseg);
1798 return PNFS_NOT_ATTEMPTED;
1799}
1800
1801
1802static enum pnfs_try_status
1803ff_layout_write_pagelist(struct nfs_pgio_header *hdr, int sync)
1804{
1805 struct pnfs_layout_segment *lseg = hdr->lseg;
1806 struct nfs4_pnfs_ds *ds;
1807 struct rpc_clnt *ds_clnt;
1808 struct nfs4_ff_layout_mirror *mirror;
1809 const struct cred *ds_cred;
1810 loff_t offset = hdr->args.offset;
1811 int vers;
1812 struct nfs_fh *fh;
1813 u32 idx = hdr->pgio_mirror_idx;
1814
1815 mirror = FF_LAYOUT_COMP(lseg, idx);
1816 ds = nfs4_ff_layout_prepare_ds(lseg, mirror, true);
1817 if (!ds)
1818 goto out_failed;
1819
1820 ds_clnt = nfs4_ff_find_or_create_ds_client(mirror, ds->ds_clp,
1821 hdr->inode);
1822 if (IS_ERR(ds_clnt))
1823 goto out_failed;
1824
1825 ds_cred = ff_layout_get_ds_cred(mirror, &lseg->pls_range, hdr->cred);
1826 if (!ds_cred)
1827 goto out_failed;
1828
1829 vers = nfs4_ff_layout_ds_version(mirror);
1830
1831 dprintk("%s ino %lu sync %d req %zu@%llu DS: %s cl_count %d vers %d\n",
1832 __func__, hdr->inode->i_ino, sync, (size_t) hdr->args.count,
1833 offset, ds->ds_remotestr, refcount_read(&ds->ds_clp->cl_count),
1834 vers);
1835
1836 hdr->pgio_done_cb = ff_layout_write_done_cb;
1837 refcount_inc(&ds->ds_clp->cl_count);
1838 hdr->ds_clp = ds->ds_clp;
1839 hdr->ds_commit_idx = idx;
1840 fh = nfs4_ff_layout_select_ds_fh(mirror);
1841 if (fh)
1842 hdr->args.fh = fh;
1843
1844 nfs4_ff_layout_select_ds_stateid(mirror, &hdr->args.stateid);
1845
1846
1847
1848
1849
1850 hdr->args.offset = offset;
1851
1852
1853 nfs_initiate_pgio(ds_clnt, hdr, ds_cred, ds->ds_clp->rpc_ops,
1854 vers == 3 ? &ff_layout_write_call_ops_v3 :
1855 &ff_layout_write_call_ops_v4,
1856 sync, RPC_TASK_SOFTCONN);
1857 put_cred(ds_cred);
1858 return PNFS_ATTEMPTED;
1859
1860out_failed:
1861 if (ff_layout_avoid_mds_available_ds(lseg))
1862 return PNFS_TRY_AGAIN;
1863 trace_pnfs_mds_fallback_write_pagelist(hdr->inode,
1864 hdr->args.offset, hdr->args.count,
1865 IOMODE_RW, NFS_I(hdr->inode)->layout, lseg);
1866 return PNFS_NOT_ATTEMPTED;
1867}
1868
1869static u32 calc_ds_index_from_commit(struct pnfs_layout_segment *lseg, u32 i)
1870{
1871 return i;
1872}
1873
1874static struct nfs_fh *
1875select_ds_fh_from_commit(struct pnfs_layout_segment *lseg, u32 i)
1876{
1877 struct nfs4_ff_layout_segment *flseg = FF_LAYOUT_LSEG(lseg);
1878
1879
1880
1881
1882 return &flseg->mirror_array[i]->fh_versions[0];
1883}
1884
1885static int ff_layout_initiate_commit(struct nfs_commit_data *data, int how)
1886{
1887 struct pnfs_layout_segment *lseg = data->lseg;
1888 struct nfs4_pnfs_ds *ds;
1889 struct rpc_clnt *ds_clnt;
1890 struct nfs4_ff_layout_mirror *mirror;
1891 const struct cred *ds_cred;
1892 u32 idx;
1893 int vers, ret;
1894 struct nfs_fh *fh;
1895
1896 if (!lseg || !(pnfs_is_valid_lseg(lseg) ||
1897 test_bit(NFS_LSEG_LAYOUTRETURN, &lseg->pls_flags)))
1898 goto out_err;
1899
1900 idx = calc_ds_index_from_commit(lseg, data->ds_commit_index);
1901 mirror = FF_LAYOUT_COMP(lseg, idx);
1902 ds = nfs4_ff_layout_prepare_ds(lseg, mirror, true);
1903 if (!ds)
1904 goto out_err;
1905
1906 ds_clnt = nfs4_ff_find_or_create_ds_client(mirror, ds->ds_clp,
1907 data->inode);
1908 if (IS_ERR(ds_clnt))
1909 goto out_err;
1910
1911 ds_cred = ff_layout_get_ds_cred(mirror, &lseg->pls_range, data->cred);
1912 if (!ds_cred)
1913 goto out_err;
1914
1915 vers = nfs4_ff_layout_ds_version(mirror);
1916
1917 dprintk("%s ino %lu, how %d cl_count %d vers %d\n", __func__,
1918 data->inode->i_ino, how, refcount_read(&ds->ds_clp->cl_count),
1919 vers);
1920 data->commit_done_cb = ff_layout_commit_done_cb;
1921 data->cred = ds_cred;
1922 refcount_inc(&ds->ds_clp->cl_count);
1923 data->ds_clp = ds->ds_clp;
1924 fh = select_ds_fh_from_commit(lseg, data->ds_commit_index);
1925 if (fh)
1926 data->args.fh = fh;
1927
1928 ret = nfs_initiate_commit(ds_clnt, data, ds->ds_clp->rpc_ops,
1929 vers == 3 ? &ff_layout_commit_call_ops_v3 :
1930 &ff_layout_commit_call_ops_v4,
1931 how, RPC_TASK_SOFTCONN);
1932 put_cred(ds_cred);
1933 return ret;
1934out_err:
1935 pnfs_generic_prepare_to_resend_writes(data);
1936 pnfs_generic_commit_release(data);
1937 return -EAGAIN;
1938}
1939
1940static int
1941ff_layout_commit_pagelist(struct inode *inode, struct list_head *mds_pages,
1942 int how, struct nfs_commit_info *cinfo)
1943{
1944 return pnfs_generic_commit_pagelist(inode, mds_pages, how, cinfo,
1945 ff_layout_initiate_commit);
1946}
1947
1948static struct pnfs_ds_commit_info *
1949ff_layout_get_ds_info(struct inode *inode)
1950{
1951 struct pnfs_layout_hdr *layout = NFS_I(inode)->layout;
1952
1953 if (layout == NULL)
1954 return NULL;
1955
1956 return &FF_LAYOUT_FROM_HDR(layout)->commit_info;
1957}
1958
1959static void
1960ff_layout_setup_ds_info(struct pnfs_ds_commit_info *fl_cinfo,
1961 struct pnfs_layout_segment *lseg)
1962{
1963 struct nfs4_ff_layout_segment *flseg = FF_LAYOUT_LSEG(lseg);
1964 struct inode *inode = lseg->pls_layout->plh_inode;
1965 struct pnfs_commit_array *array, *new;
1966
1967 new = pnfs_alloc_commit_array(flseg->mirror_array_cnt, GFP_NOIO);
1968 if (new) {
1969 spin_lock(&inode->i_lock);
1970 array = pnfs_add_commit_array(fl_cinfo, new, lseg);
1971 spin_unlock(&inode->i_lock);
1972 if (array != new)
1973 pnfs_free_commit_array(new);
1974 }
1975}
1976
1977static void
1978ff_layout_release_ds_info(struct pnfs_ds_commit_info *fl_cinfo,
1979 struct inode *inode)
1980{
1981 spin_lock(&inode->i_lock);
1982 pnfs_generic_ds_cinfo_destroy(fl_cinfo);
1983 spin_unlock(&inode->i_lock);
1984}
1985
1986static void
1987ff_layout_free_deviceid_node(struct nfs4_deviceid_node *d)
1988{
1989 nfs4_ff_layout_free_deviceid(container_of(d, struct nfs4_ff_layout_ds,
1990 id_node));
1991}
1992
1993static int ff_layout_encode_ioerr(struct xdr_stream *xdr,
1994 const struct nfs4_layoutreturn_args *args,
1995 const struct nfs4_flexfile_layoutreturn_args *ff_args)
1996{
1997 __be32 *start;
1998
1999 start = xdr_reserve_space(xdr, 4);
2000 if (unlikely(!start))
2001 return -E2BIG;
2002
2003 *start = cpu_to_be32(ff_args->num_errors);
2004
2005 return ff_layout_encode_ds_ioerr(xdr, &ff_args->errors);
2006}
2007
2008static void
2009encode_opaque_fixed(struct xdr_stream *xdr, const void *buf, size_t len)
2010{
2011 WARN_ON_ONCE(xdr_stream_encode_opaque_fixed(xdr, buf, len) < 0);
2012}
2013
2014static void
2015ff_layout_encode_ff_iostat_head(struct xdr_stream *xdr,
2016 const nfs4_stateid *stateid,
2017 const struct nfs42_layoutstat_devinfo *devinfo)
2018{
2019 __be32 *p;
2020
2021 p = xdr_reserve_space(xdr, 8 + 8);
2022 p = xdr_encode_hyper(p, devinfo->offset);
2023 p = xdr_encode_hyper(p, devinfo->length);
2024 encode_opaque_fixed(xdr, stateid->data, NFS4_STATEID_SIZE);
2025 p = xdr_reserve_space(xdr, 4*8);
2026 p = xdr_encode_hyper(p, devinfo->read_count);
2027 p = xdr_encode_hyper(p, devinfo->read_bytes);
2028 p = xdr_encode_hyper(p, devinfo->write_count);
2029 p = xdr_encode_hyper(p, devinfo->write_bytes);
2030 encode_opaque_fixed(xdr, devinfo->dev_id.data, NFS4_DEVICEID4_SIZE);
2031}
2032
2033static void
2034ff_layout_encode_ff_iostat(struct xdr_stream *xdr,
2035 const nfs4_stateid *stateid,
2036 const struct nfs42_layoutstat_devinfo *devinfo)
2037{
2038 ff_layout_encode_ff_iostat_head(xdr, stateid, devinfo);
2039 ff_layout_encode_ff_layoutupdate(xdr, devinfo,
2040 devinfo->ld_private.data);
2041}
2042
2043
2044static void ff_layout_encode_iostats_array(struct xdr_stream *xdr,
2045 const struct nfs4_layoutreturn_args *args,
2046 struct nfs4_flexfile_layoutreturn_args *ff_args)
2047{
2048 __be32 *p;
2049 int i;
2050
2051 p = xdr_reserve_space(xdr, 4);
2052 *p = cpu_to_be32(ff_args->num_dev);
2053 for (i = 0; i < ff_args->num_dev; i++)
2054 ff_layout_encode_ff_iostat(xdr,
2055 &args->layout->plh_stateid,
2056 &ff_args->devinfo[i]);
2057}
2058
2059static void
2060ff_layout_free_iostats_array(struct nfs42_layoutstat_devinfo *devinfo,
2061 unsigned int num_entries)
2062{
2063 unsigned int i;
2064
2065 for (i = 0; i < num_entries; i++) {
2066 if (!devinfo[i].ld_private.ops)
2067 continue;
2068 if (!devinfo[i].ld_private.ops->free)
2069 continue;
2070 devinfo[i].ld_private.ops->free(&devinfo[i].ld_private);
2071 }
2072}
2073
2074static struct nfs4_deviceid_node *
2075ff_layout_alloc_deviceid_node(struct nfs_server *server,
2076 struct pnfs_device *pdev, gfp_t gfp_flags)
2077{
2078 struct nfs4_ff_layout_ds *dsaddr;
2079
2080 dsaddr = nfs4_ff_alloc_deviceid_node(server, pdev, gfp_flags);
2081 if (!dsaddr)
2082 return NULL;
2083 return &dsaddr->id_node;
2084}
2085
2086static void
2087ff_layout_encode_layoutreturn(struct xdr_stream *xdr,
2088 const void *voidargs,
2089 const struct nfs4_xdr_opaque_data *ff_opaque)
2090{
2091 const struct nfs4_layoutreturn_args *args = voidargs;
2092 struct nfs4_flexfile_layoutreturn_args *ff_args = ff_opaque->data;
2093 struct xdr_buf tmp_buf = {
2094 .head = {
2095 [0] = {
2096 .iov_base = page_address(ff_args->pages[0]),
2097 },
2098 },
2099 .buflen = PAGE_SIZE,
2100 };
2101 struct xdr_stream tmp_xdr;
2102 __be32 *start;
2103
2104 dprintk("%s: Begin\n", __func__);
2105
2106 xdr_init_encode(&tmp_xdr, &tmp_buf, NULL, NULL);
2107
2108 ff_layout_encode_ioerr(&tmp_xdr, args, ff_args);
2109 ff_layout_encode_iostats_array(&tmp_xdr, args, ff_args);
2110
2111 start = xdr_reserve_space(xdr, 4);
2112 *start = cpu_to_be32(tmp_buf.len);
2113 xdr_write_pages(xdr, ff_args->pages, 0, tmp_buf.len);
2114
2115 dprintk("%s: Return\n", __func__);
2116}
2117
2118static void
2119ff_layout_free_layoutreturn(struct nfs4_xdr_opaque_data *args)
2120{
2121 struct nfs4_flexfile_layoutreturn_args *ff_args;
2122
2123 if (!args->data)
2124 return;
2125 ff_args = args->data;
2126 args->data = NULL;
2127
2128 ff_layout_free_ds_ioerr(&ff_args->errors);
2129 ff_layout_free_iostats_array(ff_args->devinfo, ff_args->num_dev);
2130
2131 put_page(ff_args->pages[0]);
2132 kfree(ff_args);
2133}
2134
2135static const struct nfs4_xdr_opaque_ops layoutreturn_ops = {
2136 .encode = ff_layout_encode_layoutreturn,
2137 .free = ff_layout_free_layoutreturn,
2138};
2139
2140static int
2141ff_layout_prepare_layoutreturn(struct nfs4_layoutreturn_args *args)
2142{
2143 struct nfs4_flexfile_layoutreturn_args *ff_args;
2144 struct nfs4_flexfile_layout *ff_layout = FF_LAYOUT_FROM_HDR(args->layout);
2145
2146 ff_args = kmalloc(sizeof(*ff_args), GFP_KERNEL);
2147 if (!ff_args)
2148 goto out_nomem;
2149 ff_args->pages[0] = alloc_page(GFP_KERNEL);
2150 if (!ff_args->pages[0])
2151 goto out_nomem_free;
2152
2153 INIT_LIST_HEAD(&ff_args->errors);
2154 ff_args->num_errors = ff_layout_fetch_ds_ioerr(args->layout,
2155 &args->range, &ff_args->errors,
2156 FF_LAYOUTRETURN_MAXERR);
2157
2158 spin_lock(&args->inode->i_lock);
2159 ff_args->num_dev = ff_layout_mirror_prepare_stats(&ff_layout->generic_hdr,
2160 &ff_args->devinfo[0], ARRAY_SIZE(ff_args->devinfo));
2161 spin_unlock(&args->inode->i_lock);
2162
2163 args->ld_private->ops = &layoutreturn_ops;
2164 args->ld_private->data = ff_args;
2165 return 0;
2166out_nomem_free:
2167 kfree(ff_args);
2168out_nomem:
2169 return -ENOMEM;
2170}
2171
2172#ifdef CONFIG_NFS_V4_2
2173void
2174ff_layout_send_layouterror(struct pnfs_layout_segment *lseg)
2175{
2176 struct pnfs_layout_hdr *lo = lseg->pls_layout;
2177 struct nfs42_layout_error *errors;
2178 LIST_HEAD(head);
2179
2180 if (!nfs_server_capable(lo->plh_inode, NFS_CAP_LAYOUTERROR))
2181 return;
2182 ff_layout_fetch_ds_ioerr(lo, &lseg->pls_range, &head, -1);
2183 if (list_empty(&head))
2184 return;
2185
2186 errors = kmalloc_array(NFS42_LAYOUTERROR_MAX,
2187 sizeof(*errors), GFP_NOFS);
2188 if (errors != NULL) {
2189 const struct nfs4_ff_layout_ds_err *pos;
2190 size_t n = 0;
2191
2192 list_for_each_entry(pos, &head, list) {
2193 errors[n].offset = pos->offset;
2194 errors[n].length = pos->length;
2195 nfs4_stateid_copy(&errors[n].stateid, &pos->stateid);
2196 errors[n].errors[0].dev_id = pos->deviceid;
2197 errors[n].errors[0].status = pos->status;
2198 errors[n].errors[0].opnum = pos->opnum;
2199 n++;
2200 if (!list_is_last(&pos->list, &head) &&
2201 n < NFS42_LAYOUTERROR_MAX)
2202 continue;
2203 if (nfs42_proc_layouterror(lseg, errors, n) < 0)
2204 break;
2205 n = 0;
2206 }
2207 kfree(errors);
2208 }
2209 ff_layout_free_ds_ioerr(&head);
2210}
2211#else
2212void
2213ff_layout_send_layouterror(struct pnfs_layout_segment *lseg)
2214{
2215}
2216#endif
2217
2218static int
2219ff_layout_ntop4(const struct sockaddr *sap, char *buf, const size_t buflen)
2220{
2221 const struct sockaddr_in *sin = (struct sockaddr_in *)sap;
2222
2223 return snprintf(buf, buflen, "%pI4", &sin->sin_addr);
2224}
2225
2226static size_t
2227ff_layout_ntop6_noscopeid(const struct sockaddr *sap, char *buf,
2228 const int buflen)
2229{
2230 const struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)sap;
2231 const struct in6_addr *addr = &sin6->sin6_addr;
2232
2233
2234
2235
2236
2237
2238 if (ipv6_addr_any(addr))
2239 return snprintf(buf, buflen, "::");
2240
2241
2242
2243
2244
2245
2246 if (ipv6_addr_loopback(addr))
2247 return snprintf(buf, buflen, "::1");
2248
2249
2250
2251
2252
2253
2254
2255 if (ipv6_addr_v4mapped(addr))
2256 return snprintf(buf, buflen, "::ffff:%pI4",
2257 &addr->s6_addr32[3]);
2258
2259
2260
2261
2262 return snprintf(buf, buflen, "%pI6c", addr);
2263}
2264
2265
2266static void
2267ff_layout_encode_netaddr(struct xdr_stream *xdr, struct nfs4_pnfs_ds_addr *da)
2268{
2269 struct sockaddr *sap = (struct sockaddr *)&da->da_addr;
2270 char portbuf[RPCBIND_MAXUADDRPLEN];
2271 char addrbuf[RPCBIND_MAXUADDRLEN];
2272 char *netid;
2273 unsigned short port;
2274 int len, netid_len;
2275 __be32 *p;
2276
2277 switch (sap->sa_family) {
2278 case AF_INET:
2279 if (ff_layout_ntop4(sap, addrbuf, sizeof(addrbuf)) == 0)
2280 return;
2281 port = ntohs(((struct sockaddr_in *)sap)->sin_port);
2282 netid = "tcp";
2283 netid_len = 3;
2284 break;
2285 case AF_INET6:
2286 if (ff_layout_ntop6_noscopeid(sap, addrbuf, sizeof(addrbuf)) == 0)
2287 return;
2288 port = ntohs(((struct sockaddr_in6 *)sap)->sin6_port);
2289 netid = "tcp6";
2290 netid_len = 4;
2291 break;
2292 default:
2293
2294 WARN_ON_ONCE(1);
2295 return;
2296 }
2297
2298 snprintf(portbuf, sizeof(portbuf), ".%u.%u", port >> 8, port & 0xff);
2299 len = strlcat(addrbuf, portbuf, sizeof(addrbuf));
2300
2301 p = xdr_reserve_space(xdr, 4 + netid_len);
2302 xdr_encode_opaque(p, netid, netid_len);
2303
2304 p = xdr_reserve_space(xdr, 4 + len);
2305 xdr_encode_opaque(p, addrbuf, len);
2306}
2307
2308static void
2309ff_layout_encode_nfstime(struct xdr_stream *xdr,
2310 ktime_t t)
2311{
2312 struct timespec64 ts;
2313 __be32 *p;
2314
2315 p = xdr_reserve_space(xdr, 12);
2316 ts = ktime_to_timespec64(t);
2317 p = xdr_encode_hyper(p, ts.tv_sec);
2318 *p++ = cpu_to_be32(ts.tv_nsec);
2319}
2320
2321static void
2322ff_layout_encode_io_latency(struct xdr_stream *xdr,
2323 struct nfs4_ff_io_stat *stat)
2324{
2325 __be32 *p;
2326
2327 p = xdr_reserve_space(xdr, 5 * 8);
2328 p = xdr_encode_hyper(p, stat->ops_requested);
2329 p = xdr_encode_hyper(p, stat->bytes_requested);
2330 p = xdr_encode_hyper(p, stat->ops_completed);
2331 p = xdr_encode_hyper(p, stat->bytes_completed);
2332 p = xdr_encode_hyper(p, stat->bytes_not_delivered);
2333 ff_layout_encode_nfstime(xdr, stat->total_busy_time);
2334 ff_layout_encode_nfstime(xdr, stat->aggregate_completion_time);
2335}
2336
2337static void
2338ff_layout_encode_ff_layoutupdate(struct xdr_stream *xdr,
2339 const struct nfs42_layoutstat_devinfo *devinfo,
2340 struct nfs4_ff_layout_mirror *mirror)
2341{
2342 struct nfs4_pnfs_ds_addr *da;
2343 struct nfs4_pnfs_ds *ds = mirror->mirror_ds->ds;
2344 struct nfs_fh *fh = &mirror->fh_versions[0];
2345 __be32 *p;
2346
2347 da = list_first_entry(&ds->ds_addrs, struct nfs4_pnfs_ds_addr, da_node);
2348 dprintk("%s: DS %s: encoding address %s\n",
2349 __func__, ds->ds_remotestr, da->da_remotestr);
2350
2351 ff_layout_encode_netaddr(xdr, da);
2352
2353 p = xdr_reserve_space(xdr, 4 + fh->size);
2354 xdr_encode_opaque(p, fh->data, fh->size);
2355
2356 spin_lock(&mirror->lock);
2357 ff_layout_encode_io_latency(xdr, &mirror->read_stat.io_stat);
2358
2359 ff_layout_encode_io_latency(xdr, &mirror->write_stat.io_stat);
2360 spin_unlock(&mirror->lock);
2361
2362 ff_layout_encode_nfstime(xdr, ktime_sub(ktime_get(), mirror->start_time));
2363
2364 p = xdr_reserve_space(xdr, 4);
2365 *p = cpu_to_be32(false);
2366}
2367
2368static void
2369ff_layout_encode_layoutstats(struct xdr_stream *xdr, const void *args,
2370 const struct nfs4_xdr_opaque_data *opaque)
2371{
2372 struct nfs42_layoutstat_devinfo *devinfo = container_of(opaque,
2373 struct nfs42_layoutstat_devinfo, ld_private);
2374 __be32 *start;
2375
2376
2377 start = xdr_reserve_space(xdr, 4);
2378 ff_layout_encode_ff_layoutupdate(xdr, devinfo, opaque->data);
2379
2380 *start = cpu_to_be32((xdr->p - start - 1) * 4);
2381}
2382
2383static void
2384ff_layout_free_layoutstats(struct nfs4_xdr_opaque_data *opaque)
2385{
2386 struct nfs4_ff_layout_mirror *mirror = opaque->data;
2387
2388 ff_layout_put_mirror(mirror);
2389}
2390
2391static const struct nfs4_xdr_opaque_ops layoutstat_ops = {
2392 .encode = ff_layout_encode_layoutstats,
2393 .free = ff_layout_free_layoutstats,
2394};
2395
2396static int
2397ff_layout_mirror_prepare_stats(struct pnfs_layout_hdr *lo,
2398 struct nfs42_layoutstat_devinfo *devinfo,
2399 int dev_limit)
2400{
2401 struct nfs4_flexfile_layout *ff_layout = FF_LAYOUT_FROM_HDR(lo);
2402 struct nfs4_ff_layout_mirror *mirror;
2403 struct nfs4_deviceid_node *dev;
2404 int i = 0;
2405
2406 list_for_each_entry(mirror, &ff_layout->mirrors, mirrors) {
2407 if (i >= dev_limit)
2408 break;
2409 if (IS_ERR_OR_NULL(mirror->mirror_ds))
2410 continue;
2411 if (!test_and_clear_bit(NFS4_FF_MIRROR_STAT_AVAIL, &mirror->flags))
2412 continue;
2413
2414 if (!refcount_inc_not_zero(&mirror->ref))
2415 continue;
2416 dev = &mirror->mirror_ds->id_node;
2417 memcpy(&devinfo->dev_id, &dev->deviceid, NFS4_DEVICEID4_SIZE);
2418 devinfo->offset = 0;
2419 devinfo->length = NFS4_MAX_UINT64;
2420 spin_lock(&mirror->lock);
2421 devinfo->read_count = mirror->read_stat.io_stat.ops_completed;
2422 devinfo->read_bytes = mirror->read_stat.io_stat.bytes_completed;
2423 devinfo->write_count = mirror->write_stat.io_stat.ops_completed;
2424 devinfo->write_bytes = mirror->write_stat.io_stat.bytes_completed;
2425 spin_unlock(&mirror->lock);
2426 devinfo->layout_type = LAYOUT_FLEX_FILES;
2427 devinfo->ld_private.ops = &layoutstat_ops;
2428 devinfo->ld_private.data = mirror;
2429
2430 devinfo++;
2431 i++;
2432 }
2433 return i;
2434}
2435
2436static int
2437ff_layout_prepare_layoutstats(struct nfs42_layoutstat_args *args)
2438{
2439 struct nfs4_flexfile_layout *ff_layout;
2440 const int dev_count = PNFS_LAYOUTSTATS_MAXDEV;
2441
2442
2443 args->devinfo = kmalloc_array(dev_count, sizeof(*args->devinfo), GFP_NOIO);
2444 if (!args->devinfo)
2445 return -ENOMEM;
2446
2447 spin_lock(&args->inode->i_lock);
2448 ff_layout = FF_LAYOUT_FROM_HDR(NFS_I(args->inode)->layout);
2449 args->num_dev = ff_layout_mirror_prepare_stats(&ff_layout->generic_hdr,
2450 &args->devinfo[0], dev_count);
2451 spin_unlock(&args->inode->i_lock);
2452 if (!args->num_dev) {
2453 kfree(args->devinfo);
2454 args->devinfo = NULL;
2455 return -ENOENT;
2456 }
2457
2458 return 0;
2459}
2460
2461static int
2462ff_layout_set_layoutdriver(struct nfs_server *server,
2463 const struct nfs_fh *dummy)
2464{
2465#if IS_ENABLED(CONFIG_NFS_V4_2)
2466 server->caps |= NFS_CAP_LAYOUTSTATS;
2467#endif
2468 return 0;
2469}
2470
2471static const struct pnfs_commit_ops ff_layout_commit_ops = {
2472 .setup_ds_info = ff_layout_setup_ds_info,
2473 .release_ds_info = ff_layout_release_ds_info,
2474 .mark_request_commit = pnfs_layout_mark_request_commit,
2475 .clear_request_commit = pnfs_generic_clear_request_commit,
2476 .scan_commit_lists = pnfs_generic_scan_commit_lists,
2477 .recover_commit_reqs = pnfs_generic_recover_commit_reqs,
2478 .commit_pagelist = ff_layout_commit_pagelist,
2479};
2480
2481static struct pnfs_layoutdriver_type flexfilelayout_type = {
2482 .id = LAYOUT_FLEX_FILES,
2483 .name = "LAYOUT_FLEX_FILES",
2484 .owner = THIS_MODULE,
2485 .flags = PNFS_LAYOUTGET_ON_OPEN,
2486 .max_layoutget_response = 4096,
2487 .set_layoutdriver = ff_layout_set_layoutdriver,
2488 .alloc_layout_hdr = ff_layout_alloc_layout_hdr,
2489 .free_layout_hdr = ff_layout_free_layout_hdr,
2490 .alloc_lseg = ff_layout_alloc_lseg,
2491 .free_lseg = ff_layout_free_lseg,
2492 .add_lseg = ff_layout_add_lseg,
2493 .pg_read_ops = &ff_layout_pg_read_ops,
2494 .pg_write_ops = &ff_layout_pg_write_ops,
2495 .get_ds_info = ff_layout_get_ds_info,
2496 .free_deviceid_node = ff_layout_free_deviceid_node,
2497 .read_pagelist = ff_layout_read_pagelist,
2498 .write_pagelist = ff_layout_write_pagelist,
2499 .alloc_deviceid_node = ff_layout_alloc_deviceid_node,
2500 .prepare_layoutreturn = ff_layout_prepare_layoutreturn,
2501 .sync = pnfs_nfs_generic_sync,
2502 .prepare_layoutstats = ff_layout_prepare_layoutstats,
2503};
2504
2505static int __init nfs4flexfilelayout_init(void)
2506{
2507 printk(KERN_INFO "%s: NFSv4 Flexfile Layout Driver Registering...\n",
2508 __func__);
2509 return pnfs_register_layoutdriver(&flexfilelayout_type);
2510}
2511
2512static void __exit nfs4flexfilelayout_exit(void)
2513{
2514 printk(KERN_INFO "%s: NFSv4 Flexfile Layout Driver Unregistering...\n",
2515 __func__);
2516 pnfs_unregister_layoutdriver(&flexfilelayout_type);
2517}
2518
2519MODULE_ALIAS("nfs-layouttype4-4");
2520
2521MODULE_LICENSE("GPL");
2522MODULE_DESCRIPTION("The NFSv4 flexfile layout driver");
2523
2524module_init(nfs4flexfilelayout_init);
2525module_exit(nfs4flexfilelayout_exit);
2526
2527module_param(io_maxretrans, ushort, 0644);
2528MODULE_PARM_DESC(io_maxretrans, "The number of times the NFSv4.1 client "
2529 "retries an I/O request before returning an error. ");
2530
