]> git.proxmox.com Git - mirror_ubuntu-jammy-kernel.git/blame - fs/nfs/flexfilelayout/flexfilelayout.c
projects / mirror_ubuntu-jammy-kernel.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
NFSv4.1/pnfs: Ensure the flexfiles layoutstats timers are consistent
[mirror_ubuntu-jammy-kernel.git] / fs / nfs / flexfilelayout / flexfilelayout.c
CommitLineData
d67ae825
TH		 1/*
2 * Module for pnfs flexfile layout driver.
3 *
4 * Copyright (c) 2014, Primary Data, Inc. All rights reserved.
5 *
6 * Tao Peng <bergwolf@primarydata.com>
7 */
8
9#include <linux/nfs_fs.h>
10#include <linux/nfs_page.h>
11#include <linux/module.h>
12
13#include <linux/sunrpc/metrics.h>
d67ae825
TH		 14
15#include "flexfilelayout.h"
16#include "../nfs4session.h"
40c64c26 17#include "../nfs4idmap.h"
d67ae825
TH		 18#include "../internal.h"
19#include "../delegation.h"
20#include "../nfs4trace.h"
21#include "../iostat.h"
22#include "../nfs.h"
ad4dc53e 23#include "../nfs42.h"
d67ae825
TH		 24
25#define NFSDBG_FACILITY NFSDBG_PNFS_LD
26
27#define FF_LAYOUT_POLL_RETRY_MAX (15*HZ)
28
29static struct pnfs_layout_hdr *
30ff_layout_alloc_layout_hdr(struct inode *inode, gfp_t gfp_flags)
31{
32 struct nfs4_flexfile_layout *ffl;
33
34 ffl = kzalloc(sizeof(*ffl), gfp_flags);
35 if (ffl) {
36 INIT_LIST_HEAD(&ffl->error_list);
37 return &ffl->generic_hdr;
38 } else
39 return NULL;
40}
41
42static void
43ff_layout_free_layout_hdr(struct pnfs_layout_hdr *lo)
44{
45 struct nfs4_ff_layout_ds_err *err, *n;
46
47 list_for_each_entry_safe(err, n, &FF_LAYOUT_FROM_HDR(lo)->error_list,
48 list) {
49 list_del(&err->list);
50 kfree(err);
51 }
52 kfree(FF_LAYOUT_FROM_HDR(lo));
53}
54
55static int decode_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
56{
57 __be32 *p;
58
59 p = xdr_inline_decode(xdr, NFS4_STATEID_SIZE);
60 if (unlikely(p == NULL))
61 return -ENOBUFS;
62 memcpy(stateid, p, NFS4_STATEID_SIZE);
63 dprintk("%s: stateid id= [%x%x%x%x]\n", __func__,
64 p[0], p[1], p[2], p[3]);
65 return 0;
66}
67
68static int decode_deviceid(struct xdr_stream *xdr, struct nfs4_deviceid *devid)
69{
70 __be32 *p;
71
72 p = xdr_inline_decode(xdr, NFS4_DEVICEID4_SIZE);
73 if (unlikely(!p))
74 return -ENOBUFS;
75 memcpy(devid, p, NFS4_DEVICEID4_SIZE);
76 nfs4_print_deviceid(devid);
77 return 0;
78}
79
80static int decode_nfs_fh(struct xdr_stream *xdr, struct nfs_fh *fh)
81{
82 __be32 *p;
83
84 p = xdr_inline_decode(xdr, 4);
85 if (unlikely(!p))
86 return -ENOBUFS;
87 fh->size = be32_to_cpup(p++);
88 if (fh->size > sizeof(struct nfs_fh)) {
89 printk(KERN_ERR "NFS flexfiles: Too big fh received %d\n",
90 fh->size);
91 return -EOVERFLOW;
92 }
93 /* fh.data */
94 p = xdr_inline_decode(xdr, fh->size);
95 if (unlikely(!p))
96 return -ENOBUFS;
97 memcpy(&fh->data, p, fh->size);
98 dprintk("%s: fh len %d\n", __func__, fh->size);
99
100 return 0;
101}
102
103/*
104 * Currently only stringified uids and gids are accepted.
105 * I.e., kerberos is not supported to the DSes, so no pricipals.
106 *
107 * That means that one common function will suffice, but when
108 * principals are added, this should be split to accomodate
109 * calls to both nfs_map_name_to_uid() and nfs_map_group_to_gid().
110 */
111static int
112decode_name(struct xdr_stream *xdr, u32 *id)
113{
114 __be32 *p;
115 int len;
116
117 /* opaque_length(4)*/
118 p = xdr_inline_decode(xdr, 4);
119 if (unlikely(!p))
120 return -ENOBUFS;
121 len = be32_to_cpup(p++);
122 if (len < 0)
123 return -EINVAL;
124
125 dprintk("%s: len %u\n", __func__, len);
126
127 /* opaque body */
128 p = xdr_inline_decode(xdr, len);
129 if (unlikely(!p))
130 return -ENOBUFS;
131
132 if (!nfs_map_string_to_numeric((char *)p, len, id))
133 return -EINVAL;
134
135 return 0;
136}
137
138static void ff_layout_free_mirror_array(struct nfs4_ff_layout_segment *fls)
139{
140 int i;
141
142 if (fls->mirror_array) {
143 for (i = 0; i < fls->mirror_array_cnt; i++) {
144 /* normally mirror_ds is freed in
145 * .free_deviceid_node but we still do it here
146 * for .alloc_lseg error path */
147 if (fls->mirror_array[i]) {
148 kfree(fls->mirror_array[i]->fh_versions);
149 nfs4_ff_layout_put_deviceid(fls->mirror_array[i]->mirror_ds);
150 kfree(fls->mirror_array[i]);
151 }
152 }
153 kfree(fls->mirror_array);
154 fls->mirror_array = NULL;
155 }
156}
157
158static int ff_layout_check_layout(struct nfs4_layoutget_res *lgr)
159{
160 int ret = 0;
161
162 dprintk("--> %s\n", __func__);
163
164 /* FIXME: remove this check when layout segment support is added */
165 if (lgr->range.offset != 0 ||
166 lgr->range.length != NFS4_MAX_UINT64) {
167 dprintk("%s Only whole file layouts supported. Use MDS i/o\n",
168 __func__);
169 ret = -EINVAL;
170 }
171
172 dprintk("--> %s returns %d\n", __func__, ret);
173 return ret;
174}
175
176static void _ff_layout_free_lseg(struct nfs4_ff_layout_segment *fls)
177{
178 if (fls) {
179 ff_layout_free_mirror_array(fls);
180 kfree(fls);
181 }
182}
183
184static void ff_layout_sort_mirrors(struct nfs4_ff_layout_segment *fls)
185{
d67ae825
TH		 186 int i, j;
187
188 for (i = 0; i < fls->mirror_array_cnt - 1; i++) {
189 for (j = i + 1; j < fls->mirror_array_cnt; j++)
190 if (fls->mirror_array[i]->efficiency <
455b6ee6
FF		 191 fls->mirror_array[j]->efficiency)
192 swap(fls->mirror_array[i],
193 fls->mirror_array[j]);
d67ae825
TH		 194 }
195}
196
197static struct pnfs_layout_segment *
198ff_layout_alloc_lseg(struct pnfs_layout_hdr *lh,
199 struct nfs4_layoutget_res *lgr,
200 gfp_t gfp_flags)
201{
202 struct pnfs_layout_segment *ret;
203 struct nfs4_ff_layout_segment *fls = NULL;
204 struct xdr_stream stream;
205 struct xdr_buf buf;
206 struct page *scratch;
207 u64 stripe_unit;
208 u32 mirror_array_cnt;
209 __be32 *p;
210 int i, rc;
211
212 dprintk("--> %s\n", __func__);
213 scratch = alloc_page(gfp_flags);
214 if (!scratch)
215 return ERR_PTR(-ENOMEM);
216
217 xdr_init_decode_pages(&stream, &buf, lgr->layoutp->pages,
218 lgr->layoutp->len);
219 xdr_set_scratch_buffer(&stream, page_address(scratch), PAGE_SIZE);
220
221 /* stripe unit and mirror_array_cnt */
222 rc = -EIO;
223 p = xdr_inline_decode(&stream, 8 + 4);
224 if (!p)
225 goto out_err_free;
226
227 p = xdr_decode_hyper(p, &stripe_unit);
228 mirror_array_cnt = be32_to_cpup(p++);
229 dprintk("%s: stripe_unit=%llu mirror_array_cnt=%u\n", __func__,
230 stripe_unit, mirror_array_cnt);
231
232 if (mirror_array_cnt > NFS4_FLEXFILE_LAYOUT_MAX_MIRROR_CNT ||
233 mirror_array_cnt == 0)
234 goto out_err_free;
235
236 rc = -ENOMEM;
237 fls = kzalloc(sizeof(*fls), gfp_flags);
238 if (!fls)
239 goto out_err_free;
240
241 fls->mirror_array_cnt = mirror_array_cnt;
242 fls->stripe_unit = stripe_unit;
243 fls->mirror_array = kcalloc(fls->mirror_array_cnt,
244 sizeof(fls->mirror_array[0]), gfp_flags);
245 if (fls->mirror_array == NULL)
246 goto out_err_free;
247
248 for (i = 0; i < fls->mirror_array_cnt; i++) {
249 struct nfs4_deviceid devid;
250 struct nfs4_deviceid_node *idnode;
251 u32 ds_count;
252 u32 fh_count;
253 int j;
254
255 rc = -EIO;
256 p = xdr_inline_decode(&stream, 4);
257 if (!p)
258 goto out_err_free;
259 ds_count = be32_to_cpup(p);
260
261 /* FIXME: allow for striping? */
262 if (ds_count != 1)
263 goto out_err_free;
264
265 fls->mirror_array[i] =
266 kzalloc(sizeof(struct nfs4_ff_layout_mirror),
267 gfp_flags);
268 if (fls->mirror_array[i] == NULL) {
269 rc = -ENOMEM;
270 goto out_err_free;
271 }
272
273 spin_lock_init(&fls->mirror_array[i]->lock);
274 fls->mirror_array[i]->ds_count = ds_count;
27c43064 275 fls->mirror_array[i]->lseg = &fls->generic_hdr;
d67ae825
TH		 276
277 /* deviceid */
278 rc = decode_deviceid(&stream, &devid);
279 if (rc)
280 goto out_err_free;
281
282 idnode = nfs4_find_get_deviceid(NFS_SERVER(lh->plh_inode),
283 &devid, lh->plh_lc_cred,
284 gfp_flags);
285 /*
286 * upon success, mirror_ds is allocated by previous
287 * getdeviceinfo, or newly by .alloc_deviceid_node
288 * nfs4_find_get_deviceid failure is indeed getdeviceinfo falure
289 */
290 if (idnode)
291 fls->mirror_array[i]->mirror_ds =
292 FF_LAYOUT_MIRROR_DS(idnode);
293 else
294 goto out_err_free;
295
296 /* efficiency */
297 rc = -EIO;
298 p = xdr_inline_decode(&stream, 4);
299 if (!p)
300 goto out_err_free;
301 fls->mirror_array[i]->efficiency = be32_to_cpup(p);
302
303 /* stateid */
304 rc = decode_stateid(&stream, &fls->mirror_array[i]->stateid);
305 if (rc)
306 goto out_err_free;
307
308 /* fh */
309 p = xdr_inline_decode(&stream, 4);
310 if (!p)
311 goto out_err_free;
312 fh_count = be32_to_cpup(p);
313
314 fls->mirror_array[i]->fh_versions =
315 kzalloc(fh_count * sizeof(struct nfs_fh),
316 gfp_flags);
317 if (fls->mirror_array[i]->fh_versions == NULL) {
318 rc = -ENOMEM;
319 goto out_err_free;
320 }
321
322 for (j = 0; j < fh_count; j++) {
323 rc = decode_nfs_fh(&stream,
324 &fls->mirror_array[i]->fh_versions[j]);
325 if (rc)
326 goto out_err_free;
327 }
328
329 fls->mirror_array[i]->fh_versions_cnt = fh_count;
330
331 /* user */
332 rc = decode_name(&stream, &fls->mirror_array[i]->uid);
333 if (rc)
334 goto out_err_free;
335
336 /* group */
337 rc = decode_name(&stream, &fls->mirror_array[i]->gid);
338 if (rc)
339 goto out_err_free;
340
341 dprintk("%s: uid %d gid %d\n", __func__,
342 fls->mirror_array[i]->uid,
343 fls->mirror_array[i]->gid);
344 }
345
c0f5f505
TM		 346 p = xdr_inline_decode(&stream, 4);
347 if (p)
348 fls->flags = be32_to_cpup(p);
349
d67ae825
TH		 350 ff_layout_sort_mirrors(fls);
351 rc = ff_layout_check_layout(lgr);
352 if (rc)
353 goto out_err_free;
354
355 ret = &fls->generic_hdr;
356 dprintk("<-- %s (success)\n", __func__);
357out_free_page:
358 __free_page(scratch);
359 return ret;
360out_err_free:
361 _ff_layout_free_lseg(fls);
362 ret = ERR_PTR(rc);
363 dprintk("<-- %s (%d)\n", __func__, rc);
364 goto out_free_page;
365}
366
367static bool ff_layout_has_rw_segments(struct pnfs_layout_hdr *layout)
368{
369 struct pnfs_layout_segment *lseg;
370
371 list_for_each_entry(lseg, &layout->plh_segs, pls_list)
372 if (lseg->pls_range.iomode == IOMODE_RW)
373 return true;
374
375 return false;
376}
377
378static void
379ff_layout_free_lseg(struct pnfs_layout_segment *lseg)
380{
381 struct nfs4_ff_layout_segment *fls = FF_LAYOUT_LSEG(lseg);
382 int i;
383
384 dprintk("--> %s\n", __func__);
385
386 for (i = 0; i < fls->mirror_array_cnt; i++) {
387 if (fls->mirror_array[i]) {
388 nfs4_ff_layout_put_deviceid(fls->mirror_array[i]->mirror_ds);
389 fls->mirror_array[i]->mirror_ds = NULL;
390 if (fls->mirror_array[i]->cred) {
391 put_rpccred(fls->mirror_array[i]->cred);
392 fls->mirror_array[i]->cred = NULL;
393 }
394 }
395 }
396
397 if (lseg->pls_range.iomode == IOMODE_RW) {
398 struct nfs4_flexfile_layout *ffl;
399 struct inode *inode;
400
401 ffl = FF_LAYOUT_FROM_HDR(lseg->pls_layout);
402 inode = ffl->generic_hdr.plh_inode;
403 spin_lock(&inode->i_lock);
404 if (!ff_layout_has_rw_segments(lseg->pls_layout)) {
405 ffl->commit_info.nbuckets = 0;
406 kfree(ffl->commit_info.buckets);
407 ffl->commit_info.buckets = NULL;
408 }
409 spin_unlock(&inode->i_lock);
410 }
411 _ff_layout_free_lseg(fls);
412}
413
414/* Return 1 until we have multiple lsegs support */
415static int
416ff_layout_get_lseg_count(struct nfs4_ff_layout_segment *fls)
417{
418 return 1;
419}
420
abcb7bfc 421static void
e76d28dd 422nfs4_ff_start_busy_timer(struct nfs4_ff_busy_timer *timer, ktime_t now)
abcb7bfc 423{
9bbd9bb4
PT		 424 /* first IO request? */
425 if (atomic_inc_return(&timer->n_ops) == 1) {
e76d28dd 426 timer->start_time = now;
abcb7bfc
TM		 427 }
428}
429
430static ktime_t
e76d28dd 431nfs4_ff_end_busy_timer(struct nfs4_ff_busy_timer *timer, ktime_t now)
abcb7bfc 432{
e76d28dd 433 ktime_t start;
abcb7bfc 434
9bbd9bb4
PT		 435 if (atomic_dec_return(&timer->n_ops) < 0)
436 WARN_ON_ONCE(1);
437
9bbd9bb4
PT		 438 start = timer->start_time;
439 timer->start_time = now;
abcb7bfc
TM		 440 return ktime_sub(now, start);
441}
442
97ba375b 443static bool
d983803d 444nfs4_ff_layoutstat_start_io(struct nfs4_ff_layout_mirror *mirror,
e76d28dd
TM		 445 struct nfs4_ff_layoutstat *layoutstat,
446 ktime_t now)
abcb7bfc 447{
d983803d
PT		 448 static const ktime_t notime = {0};
449
e76d28dd 450 nfs4_ff_start_busy_timer(&layoutstat->busy_timer, now);
9bbd9bb4
PT		 451 if (ktime_equal(mirror->start_time, notime))
452 mirror->start_time = now;
453 if (ktime_equal(mirror->last_report_time, notime))
454 mirror->last_report_time = now;
97ba375b
PT		 455 if (ktime_to_ms(ktime_sub(now, mirror->last_report_time)) >=
456 FF_LAYOUTSTATS_REPORT_INTERVAL) {
457 mirror->last_report_time = now;
458 return true;
459 }
460
461 return false;
abcb7bfc
TM		 462}
463
464static void
465nfs4_ff_layout_stat_io_update_requested(struct nfs4_ff_layoutstat *layoutstat,
466 __u64 requested)
467{
468 struct nfs4_ff_io_stat *iostat = &layoutstat->io_stat;
469
470 iostat->ops_requested++;
471 iostat->bytes_requested += requested;
472}
473
474static void
475nfs4_ff_layout_stat_io_update_completed(struct nfs4_ff_layoutstat *layoutstat,
476 __u64 requested,
477 __u64 completed,
e76d28dd
TM		 478 ktime_t time_completed,
479 ktime_t time_started)
abcb7bfc
TM		 480{
481 struct nfs4_ff_io_stat *iostat = &layoutstat->io_stat;
e76d28dd 482 ktime_t completion_time = ktime_sub(time_completed, time_started);
abcb7bfc
TM		 483 ktime_t timer;
484
485 iostat->ops_completed++;
486 iostat->bytes_completed += completed;
487 iostat->bytes_not_delivered += requested - completed;
488
e76d28dd 489 timer = nfs4_ff_end_busy_timer(&layoutstat->busy_timer, time_completed);
abcb7bfc
TM		 490 iostat->total_busy_time =
491 ktime_add(iostat->total_busy_time, timer);
492 iostat->aggregate_completion_time =
e76d28dd
TM		 493 ktime_add(iostat->aggregate_completion_time,
494 completion_time);
abcb7bfc
TM		 495}
496
497static void
498nfs4_ff_layout_stat_io_start_read(struct nfs4_ff_layout_mirror *mirror,
e76d28dd 499 __u64 requested, ktime_t now)
abcb7bfc 500{
97ba375b
PT		 501 bool report;
502
abcb7bfc 503 spin_lock(&mirror->lock);
e76d28dd 504 report = nfs4_ff_layoutstat_start_io(mirror, &mirror->read_stat, now);
abcb7bfc
TM		 505 nfs4_ff_layout_stat_io_update_requested(&mirror->read_stat, requested);
506 spin_unlock(&mirror->lock);
97ba375b
PT		 507
508 if (report)
c8ad8894
TM		 509 pnfs_report_layoutstat(mirror->lseg->pls_layout->plh_inode,
510 GFP_KERNEL);
abcb7bfc
TM		 511}
512
513static void
514nfs4_ff_layout_stat_io_end_read(struct rpc_task *task,
515 struct nfs4_ff_layout_mirror *mirror,
516 __u64 requested,
517 __u64 completed)
518{
519 spin_lock(&mirror->lock);
520 nfs4_ff_layout_stat_io_update_completed(&mirror->read_stat,
521 requested, completed,
e76d28dd 522 ktime_get(), task->tk_start);
abcb7bfc
TM		 523 spin_unlock(&mirror->lock);
524}
525
526static void
527nfs4_ff_layout_stat_io_start_write(struct nfs4_ff_layout_mirror *mirror,
e76d28dd 528 __u64 requested, ktime_t now)
abcb7bfc 529{
97ba375b
PT		 530 bool report;
531
abcb7bfc 532 spin_lock(&mirror->lock);
e76d28dd 533 report = nfs4_ff_layoutstat_start_io(mirror , &mirror->write_stat, now);
abcb7bfc
TM		 534 nfs4_ff_layout_stat_io_update_requested(&mirror->write_stat, requested);
535 spin_unlock(&mirror->lock);
97ba375b
PT		 536
537 if (report)
c8ad8894
TM		 538 pnfs_report_layoutstat(mirror->lseg->pls_layout->plh_inode,
539 GFP_NOIO);
abcb7bfc
TM		 540}
541
542static void
543nfs4_ff_layout_stat_io_end_write(struct rpc_task *task,
544 struct nfs4_ff_layout_mirror *mirror,
545 __u64 requested,
546 __u64 completed,
547 enum nfs3_stable_how committed)
548{
549 if (committed == NFS_UNSTABLE)
550 requested = completed = 0;
551
552 spin_lock(&mirror->lock);
553 nfs4_ff_layout_stat_io_update_completed(&mirror->write_stat,
e76d28dd 554 requested, completed, ktime_get(), task->tk_start);
abcb7bfc
TM		 555 spin_unlock(&mirror->lock);
556}
557
d67ae825
TH		 558static int
559ff_layout_alloc_commit_info(struct pnfs_layout_segment *lseg,
560 struct nfs_commit_info *cinfo,
561 gfp_t gfp_flags)
562{
563 struct nfs4_ff_layout_segment *fls = FF_LAYOUT_LSEG(lseg);
564 struct pnfs_commit_bucket *buckets;
565 int size;
566
567 if (cinfo->ds->nbuckets != 0) {
568 /* This assumes there is only one RW lseg per file.
569 * To support multiple lseg per file, we need to
570 * change struct pnfs_commit_bucket to allow dynamic
571 * increasing nbuckets.
572 */
573 return 0;
574 }
575
576 size = ff_layout_get_lseg_count(fls) * FF_LAYOUT_MIRROR_COUNT(lseg);
577
578 buckets = kcalloc(size, sizeof(struct pnfs_commit_bucket),
579 gfp_flags);
580 if (!buckets)
581 return -ENOMEM;
582 else {
583 int i;
584
585 spin_lock(cinfo->lock);
586 if (cinfo->ds->nbuckets != 0)
587 kfree(buckets);
588 else {
589 cinfo->ds->buckets = buckets;
590 cinfo->ds->nbuckets = size;
591 for (i = 0; i < size; i++) {
592 INIT_LIST_HEAD(&buckets[i].written);
593 INIT_LIST_HEAD(&buckets[i].committing);
594 /* mark direct verifier as unset */
595 buckets[i].direct_verf.committed =
596 NFS_INVALID_STABLE_HOW;
597 }
598 }
599 spin_unlock(cinfo->lock);
600 return 0;
601 }
602}
603
604static struct nfs4_pnfs_ds *
605ff_layout_choose_best_ds_for_read(struct nfs_pageio_descriptor *pgio,
606 int *best_idx)
607{
608 struct nfs4_ff_layout_segment *fls;
609 struct nfs4_pnfs_ds *ds;
610 int idx;
611
612 fls = FF_LAYOUT_LSEG(pgio->pg_lseg);
613 /* mirrors are sorted by efficiency */
614 for (idx = 0; idx < fls->mirror_array_cnt; idx++) {
615 ds = nfs4_ff_layout_prepare_ds(pgio->pg_lseg, idx, false);
616 if (ds) {
617 *best_idx = idx;
618 return ds;
619 }
620 }
621
622 return NULL;
623}
624
625static void
626ff_layout_pg_init_read(struct nfs_pageio_descriptor *pgio,
627 struct nfs_page *req)
628{
629 struct nfs_pgio_mirror *pgm;
630 struct nfs4_ff_layout_mirror *mirror;
631 struct nfs4_pnfs_ds *ds;
632 int ds_idx;
633
634 /* Use full layout for now */
635 if (!pgio->pg_lseg)
636 pgio->pg_lseg = pnfs_update_layout(pgio->pg_inode,
637 req->wb_context,
638 0,
639 NFS4_MAX_UINT64,
640 IOMODE_READ,
641 GFP_KERNEL);
642 /* If no lseg, fall back to read through mds */
643 if (pgio->pg_lseg == NULL)
644 goto out_mds;
645
646 ds = ff_layout_choose_best_ds_for_read(pgio, &ds_idx);
647 if (!ds)
648 goto out_mds;
649 mirror = FF_LAYOUT_COMP(pgio->pg_lseg, ds_idx);
650
651 pgio->pg_mirror_idx = ds_idx;
652
653 /* read always uses only one mirror - idx 0 for pgio layer */
654 pgm = &pgio->pg_mirrors[0];
655 pgm->pg_bsize = mirror->mirror_ds->ds_versions[0].rsize;
656
657 return;
658out_mds:
659 pnfs_put_lseg(pgio->pg_lseg);
660 pgio->pg_lseg = NULL;
661 nfs_pageio_reset_read_mds(pgio);
662}
663
664static void
665ff_layout_pg_init_write(struct nfs_pageio_descriptor *pgio,
666 struct nfs_page *req)
667{
668 struct nfs4_ff_layout_mirror *mirror;
669 struct nfs_pgio_mirror *pgm;
670 struct nfs_commit_info cinfo;
671 struct nfs4_pnfs_ds *ds;
672 int i;
673 int status;
674
675 if (!pgio->pg_lseg)
676 pgio->pg_lseg = pnfs_update_layout(pgio->pg_inode,
677 req->wb_context,
678 0,
679 NFS4_MAX_UINT64,
680 IOMODE_RW,
681 GFP_NOFS);
682 /* If no lseg, fall back to write through mds */
683 if (pgio->pg_lseg == NULL)
684 goto out_mds;
685
686 nfs_init_cinfo(&cinfo, pgio->pg_inode, pgio->pg_dreq);
687 status = ff_layout_alloc_commit_info(pgio->pg_lseg, &cinfo, GFP_NOFS);
688 if (status < 0)
689 goto out_mds;
690
691 /* Use a direct mapping of ds_idx to pgio mirror_idx */
692 if (WARN_ON_ONCE(pgio->pg_mirror_count !=
693 FF_LAYOUT_MIRROR_COUNT(pgio->pg_lseg)))
694 goto out_mds;
695
696 for (i = 0; i < pgio->pg_mirror_count; i++) {
697 ds = nfs4_ff_layout_prepare_ds(pgio->pg_lseg, i, true);
698 if (!ds)
699 goto out_mds;
700 pgm = &pgio->pg_mirrors[i];
701 mirror = FF_LAYOUT_COMP(pgio->pg_lseg, i);
702 pgm->pg_bsize = mirror->mirror_ds->ds_versions[0].wsize;
703 }
704
705 return;
706
707out_mds:
708 pnfs_put_lseg(pgio->pg_lseg);
709 pgio->pg_lseg = NULL;
710 nfs_pageio_reset_write_mds(pgio);
711}
712
713static unsigned int
714ff_layout_pg_get_mirror_count_write(struct nfs_pageio_descriptor *pgio,
715 struct nfs_page *req)
716{
717 if (!pgio->pg_lseg)
718 pgio->pg_lseg = pnfs_update_layout(pgio->pg_inode,
719 req->wb_context,
720 0,
721 NFS4_MAX_UINT64,
722 IOMODE_RW,
723 GFP_NOFS);
724 if (pgio->pg_lseg)
725 return FF_LAYOUT_MIRROR_COUNT(pgio->pg_lseg);
726
727 /* no lseg means that pnfs is not in use, so no mirroring here */
d67ae825
TH		 728 nfs_pageio_reset_write_mds(pgio);
729 return 1;
730}
731
732static const struct nfs_pageio_ops ff_layout_pg_read_ops = {
733 .pg_init = ff_layout_pg_init_read,
734 .pg_test = pnfs_generic_pg_test,
735 .pg_doio = pnfs_generic_pg_readpages,
736 .pg_cleanup = pnfs_generic_pg_cleanup,
737};
738
739static const struct nfs_pageio_ops ff_layout_pg_write_ops = {
740 .pg_init = ff_layout_pg_init_write,
741 .pg_test = pnfs_generic_pg_test,
742 .pg_doio = pnfs_generic_pg_writepages,
743 .pg_get_mirror_count = ff_layout_pg_get_mirror_count_write,
744 .pg_cleanup = pnfs_generic_pg_cleanup,
745};
746
747static void ff_layout_reset_write(struct nfs_pgio_header *hdr, bool retry_pnfs)
748{
749 struct rpc_task *task = &hdr->task;
750
751 pnfs_layoutcommit_inode(hdr->inode, false);
752
753 if (retry_pnfs) {
754 dprintk("%s Reset task %5u for i/o through pNFS "
755 "(req %s/%llu, %u bytes @ offset %llu)\n", __func__,
756 hdr->task.tk_pid,
757 hdr->inode->i_sb->s_id,
758 (unsigned long long)NFS_FILEID(hdr->inode),
759 hdr->args.count,
760 (unsigned long long)hdr->args.offset);
761
762 if (!hdr->dreq) {
763 struct nfs_open_context *ctx;
764
765 ctx = nfs_list_entry(hdr->pages.next)->wb_context;
766 set_bit(NFS_CONTEXT_RESEND_WRITES, &ctx->flags);
767 hdr->completion_ops->error_cleanup(&hdr->pages);
768 } else {
769 nfs_direct_set_resched_writes(hdr->dreq);
770 /* fake unstable write to let common nfs resend pages */
771 hdr->verf.committed = NFS_UNSTABLE;
d6208769 772 hdr->good_bytes = hdr->args.count;
d67ae825
TH		 773 }
774 return;
775 }
776
777 if (!test_and_set_bit(NFS_IOHDR_REDO, &hdr->flags)) {
778 dprintk("%s Reset task %5u for i/o through MDS "
779 "(req %s/%llu, %u bytes @ offset %llu)\n", __func__,
780 hdr->task.tk_pid,
781 hdr->inode->i_sb->s_id,
782 (unsigned long long)NFS_FILEID(hdr->inode),
783 hdr->args.count,
784 (unsigned long long)hdr->args.offset);
785
786 task->tk_status = pnfs_write_done_resend_to_mds(hdr);
787 }
788}
789
790static void ff_layout_reset_read(struct nfs_pgio_header *hdr)
791{
792 struct rpc_task *task = &hdr->task;
793
794 pnfs_layoutcommit_inode(hdr->inode, false);
795
796 if (!test_and_set_bit(NFS_IOHDR_REDO, &hdr->flags)) {
797 dprintk("%s Reset task %5u for i/o through MDS "
798 "(req %s/%llu, %u bytes @ offset %llu)\n", __func__,
799 hdr->task.tk_pid,
800 hdr->inode->i_sb->s_id,
801 (unsigned long long)NFS_FILEID(hdr->inode),
802 hdr->args.count,
803 (unsigned long long)hdr->args.offset);
804
805 task->tk_status = pnfs_read_done_resend_to_mds(hdr);
806 }
807}
808
809static int ff_layout_async_handle_error_v4(struct rpc_task *task,
810 struct nfs4_state *state,
811 struct nfs_client *clp,
812 struct pnfs_layout_segment *lseg,
813 int idx)
814{
815 struct pnfs_layout_hdr *lo = lseg->pls_layout;
816 struct inode *inode = lo->plh_inode;
817 struct nfs_server *mds_server = NFS_SERVER(inode);
818
819 struct nfs4_deviceid_node *devid = FF_LAYOUT_DEVID_NODE(lseg, idx);
820 struct nfs_client *mds_client = mds_server->nfs_client;
821 struct nfs4_slot_table *tbl = &clp->cl_session->fc_slot_table;
822
823 if (task->tk_status >= 0)
824 return 0;
825
826 switch (task->tk_status) {
827 /* MDS state errors */
828 case -NFS4ERR_DELEG_REVOKED:
829 case -NFS4ERR_ADMIN_REVOKED:
830 case -NFS4ERR_BAD_STATEID:
831 if (state == NULL)
832 break;
833 nfs_remove_bad_delegation(state->inode);
834 case -NFS4ERR_OPENMODE:
835 if (state == NULL)
836 break;
837 if (nfs4_schedule_stateid_recovery(mds_server, state) < 0)
838 goto out_bad_stateid;
839 goto wait_on_recovery;
840 case -NFS4ERR_EXPIRED:
841 if (state != NULL) {
842 if (nfs4_schedule_stateid_recovery(mds_server, state) < 0)
843 goto out_bad_stateid;
844 }
845 nfs4_schedule_lease_recovery(mds_client);
846 goto wait_on_recovery;
847 /* DS session errors */
848 case -NFS4ERR_BADSESSION:
849 case -NFS4ERR_BADSLOT:
850 case -NFS4ERR_BAD_HIGH_SLOT:
851 case -NFS4ERR_DEADSESSION:
852 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
853 case -NFS4ERR_SEQ_FALSE_RETRY:
854 case -NFS4ERR_SEQ_MISORDERED:
855 dprintk("%s ERROR %d, Reset session. Exchangeid "
856 "flags 0x%x\n", __func__, task->tk_status,
857 clp->cl_exchange_flags);
858 nfs4_schedule_session_recovery(clp->cl_session, task->tk_status);
859 break;
860 case -NFS4ERR_DELAY:
861 case -NFS4ERR_GRACE:
862 rpc_delay(task, FF_LAYOUT_POLL_RETRY_MAX);
863 break;
864 case -NFS4ERR_RETRY_UNCACHED_REP:
865 break;
866 /* Invalidate Layout errors */
867 case -NFS4ERR_PNFS_NO_LAYOUT:
868 case -ESTALE: /* mapped NFS4ERR_STALE */
869 case -EBADHANDLE: /* mapped NFS4ERR_BADHANDLE */
870 case -EISDIR: /* mapped NFS4ERR_ISDIR */
871 case -NFS4ERR_FHEXPIRED:
872 case -NFS4ERR_WRONG_TYPE:
873 dprintk("%s Invalid layout error %d\n", __func__,
874 task->tk_status);
875 /*
876 * Destroy layout so new i/o will get a new layout.
877 * Layout will not be destroyed until all current lseg
878 * references are put. Mark layout as invalid to resend failed
879 * i/o and all i/o waiting on the slot table to the MDS until
880 * layout is destroyed and a new valid layout is obtained.
881 */
882 pnfs_destroy_layout(NFS_I(inode));
883 rpc_wake_up(&tbl->slot_tbl_waitq);
884 goto reset;
885 /* RPC connection errors */
886 case -ECONNREFUSED:
887 case -EHOSTDOWN:
888 case -EHOSTUNREACH:
889 case -ENETUNREACH:
890 case -EIO:
891 case -ETIMEDOUT:
892 case -EPIPE:
893 dprintk("%s DS connection error %d\n", __func__,
894 task->tk_status);
895 nfs4_mark_deviceid_unavailable(devid);
896 rpc_wake_up(&tbl->slot_tbl_waitq);
897 /* fall through */
898 default:
899 if (ff_layout_has_available_ds(lseg))
900 return -NFS4ERR_RESET_TO_PNFS;
901reset:
902 dprintk("%s Retry through MDS. Error %d\n", __func__,
903 task->tk_status);
904 return -NFS4ERR_RESET_TO_MDS;
905 }
906out:
907 task->tk_status = 0;
908 return -EAGAIN;
909out_bad_stateid:
910 task->tk_status = -EIO;
911 return 0;
912wait_on_recovery:
913 rpc_sleep_on(&mds_client->cl_rpcwaitq, task, NULL);
914 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &mds_client->cl_state) == 0)
915 rpc_wake_up_queued_task(&mds_client->cl_rpcwaitq, task);
916 goto out;
917}
918
919/* Retry all errors through either pNFS or MDS except for -EJUKEBOX */
920static int ff_layout_async_handle_error_v3(struct rpc_task *task,
921 struct pnfs_layout_segment *lseg,
922 int idx)
923{
924 struct nfs4_deviceid_node *devid = FF_LAYOUT_DEVID_NODE(lseg, idx);
925
926 if (task->tk_status >= 0)
927 return 0;
928
929 if (task->tk_status != -EJUKEBOX) {
930 dprintk("%s DS connection error %d\n", __func__,
931 task->tk_status);
932 nfs4_mark_deviceid_unavailable(devid);
933 if (ff_layout_has_available_ds(lseg))
934 return -NFS4ERR_RESET_TO_PNFS;
935 else
936 return -NFS4ERR_RESET_TO_MDS;
937 }
938
939 if (task->tk_status == -EJUKEBOX)
940 nfs_inc_stats(lseg->pls_layout->plh_inode, NFSIOS_DELAY);
941 task->tk_status = 0;
942 rpc_restart_call(task);
943 rpc_delay(task, NFS_JUKEBOX_RETRY_TIME);
944 return -EAGAIN;
945}
946
947static int ff_layout_async_handle_error(struct rpc_task *task,
948 struct nfs4_state *state,
949 struct nfs_client *clp,
950 struct pnfs_layout_segment *lseg,
951 int idx)
952{
953 int vers = clp->cl_nfs_mod->rpc_vers->number;
954
955 switch (vers) {
956 case 3:
957 return ff_layout_async_handle_error_v3(task, lseg, idx);
958 case 4:
959 return ff_layout_async_handle_error_v4(task, state, clp,
960 lseg, idx);
961 default:
962 /* should never happen */
963 WARN_ON_ONCE(1);
964 return 0;
965 }
966}
967
968static void ff_layout_io_track_ds_error(struct pnfs_layout_segment *lseg,
969 int idx, u64 offset, u64 length,
970 u32 status, int opnum)
971{
972 struct nfs4_ff_layout_mirror *mirror;
973 int err;
974
975 mirror = FF_LAYOUT_COMP(lseg, idx);
976 err = ff_layout_track_ds_error(FF_LAYOUT_FROM_HDR(lseg->pls_layout),
977 mirror, offset, length, status, opnum,
978 GFP_NOIO);
979 dprintk("%s: err %d op %d status %u\n", __func__, err, opnum, status);
980}
981
982/* NFS_PROTO call done callback routines */
983
984static int ff_layout_read_done_cb(struct rpc_task *task,
985 struct nfs_pgio_header *hdr)
986{
987 struct inode *inode;
988 int err;
989
990 trace_nfs4_pnfs_read(hdr, task->tk_status);
991 if (task->tk_status == -ETIMEDOUT && !hdr->res.op_status)
992 hdr->res.op_status = NFS4ERR_NXIO;
993 if (task->tk_status < 0 && hdr->res.op_status)
994 ff_layout_io_track_ds_error(hdr->lseg, hdr->pgio_mirror_idx,
995 hdr->args.offset, hdr->args.count,
996 hdr->res.op_status, OP_READ);
997 err = ff_layout_async_handle_error(task, hdr->args.context->state,
998 hdr->ds_clp, hdr->lseg,
999 hdr->pgio_mirror_idx);
1000
1001 switch (err) {
1002 case -NFS4ERR_RESET_TO_PNFS:
1003 set_bit(NFS_LAYOUT_RETURN_BEFORE_CLOSE,
1004 &hdr->lseg->pls_layout->plh_flags);
1005 pnfs_read_resend_pnfs(hdr);
1006 return task->tk_status;
1007 case -NFS4ERR_RESET_TO_MDS:
1008 inode = hdr->lseg->pls_layout->plh_inode;
1009 pnfs_error_mark_layout_for_return(inode, hdr->lseg);
1010 ff_layout_reset_read(hdr);
1011 return task->tk_status;
1012 case -EAGAIN:
1013 rpc_restart_call_prepare(task);
1014 return -EAGAIN;
1015 }
1016
1017 return 0;
1018}
1019
c0f5f505
TM		 1020static bool
1021ff_layout_need_layoutcommit(struct pnfs_layout_segment *lseg)
1022{
1023 return !(FF_LAYOUT_LSEG(lseg)->flags & FF_FLAGS_NO_LAYOUTCOMMIT);
1024}
1025
d67ae825
TH		 1026/*
1027 * We reference the rpc_cred of the first WRITE that triggers the need for
1028 * a LAYOUTCOMMIT, and use it to send the layoutcommit compound.
1029 * rfc5661 is not clear about which credential should be used.
1030 *
1031 * Flexlayout client should treat DS replied FILE_SYNC as DATA_SYNC, so
1032 * to follow http://www.rfc-editor.org/errata_search.php?rfc=5661&eid=2751
1033 * we always send layoutcommit after DS writes.
1034 */
1035static void
1036ff_layout_set_layoutcommit(struct nfs_pgio_header *hdr)
1037{
c0f5f505
TM		 1038 if (!ff_layout_need_layoutcommit(hdr->lseg))
1039 return;
1040
67af7611
TM		 1041 pnfs_set_layoutcommit(hdr->inode, hdr->lseg,
1042 hdr->mds_offset + hdr->res.count);
d67ae825
TH		 1043 dprintk("%s inode %lu pls_end_pos %lu\n", __func__, hdr->inode->i_ino,
1044 (unsigned long) NFS_I(hdr->inode)->layout->plh_lwb);
1045}
1046
1047static bool
1048ff_layout_reset_to_mds(struct pnfs_layout_segment *lseg, int idx)
1049{
1050 /* No mirroring for now */
1051 struct nfs4_deviceid_node *node = FF_LAYOUT_DEVID_NODE(lseg, idx);
1052
1053 return ff_layout_test_devid_unavailable(node);
1054}
1055
1056static int ff_layout_read_prepare_common(struct rpc_task *task,
1057 struct nfs_pgio_header *hdr)
1058{
abcb7bfc
TM		 1059 nfs4_ff_layout_stat_io_start_read(
1060 FF_LAYOUT_COMP(hdr->lseg, hdr->pgio_mirror_idx),
e76d28dd
TM		 1061 hdr->args.count,
1062 task->tk_start);
abcb7bfc 1063
d67ae825
TH		 1064 if (unlikely(test_bit(NFS_CONTEXT_BAD, &hdr->args.context->flags))) {
1065 rpc_exit(task, -EIO);
1066 return -EIO;
1067 }
1068 if (ff_layout_reset_to_mds(hdr->lseg, hdr->pgio_mirror_idx)) {
1069 dprintk("%s task %u reset io to MDS\n", __func__, task->tk_pid);
1070 if (ff_layout_has_available_ds(hdr->lseg))
1071 pnfs_read_resend_pnfs(hdr);
1072 else
1073 ff_layout_reset_read(hdr);
1074 rpc_exit(task, 0);
1075 return -EAGAIN;
1076 }
1077 hdr->pgio_done_cb = ff_layout_read_done_cb;
1078
1079 return 0;
1080}
1081
1082/*
1083 * Call ops for the async read/write cases
1084 * In the case of dense layouts, the offset needs to be reset to its
1085 * original value.
1086 */
1087static void ff_layout_read_prepare_v3(struct rpc_task *task, void *data)
1088{
1089 struct nfs_pgio_header *hdr = data;
1090
1091 if (ff_layout_read_prepare_common(task, hdr))
1092 return;
1093
1094 rpc_call_start(task);
1095}
1096
1097static int ff_layout_setup_sequence(struct nfs_client *ds_clp,
1098 struct nfs4_sequence_args *args,
1099 struct nfs4_sequence_res *res,
1100 struct rpc_task *task)
1101{
1102 if (ds_clp->cl_session)
1103 return nfs41_setup_sequence(ds_clp->cl_session,
1104 args,
1105 res,
1106 task);
1107 return nfs40_setup_sequence(ds_clp->cl_slot_tbl,
1108 args,
1109 res,
1110 task);
1111}
1112
1113static void ff_layout_read_prepare_v4(struct rpc_task *task, void *data)
1114{
1115 struct nfs_pgio_header *hdr = data;
1116
d67ae825
TH		 1117 if (ff_layout_setup_sequence(hdr->ds_clp,
1118 &hdr->args.seq_args,
1119 &hdr->res.seq_res,
1120 task))
1121 return;
1122
abcb7bfc
TM		 1123 if (ff_layout_read_prepare_common(task, hdr))
1124 return;
1125
d67ae825
TH		 1126 if (nfs4_set_rw_stateid(&hdr->args.stateid, hdr->args.context,
1127 hdr->args.lock_context, FMODE_READ) == -EIO)
1128 rpc_exit(task, -EIO); /* lost lock, terminate I/O */
1129}
1130
1131static void ff_layout_read_call_done(struct rpc_task *task, void *data)
1132{
1133 struct nfs_pgio_header *hdr = data;
1134
1135 dprintk("--> %s task->tk_status %d\n", __func__, task->tk_status);
1136
abcb7bfc
TM		 1137 nfs4_ff_layout_stat_io_end_read(task,
1138 FF_LAYOUT_COMP(hdr->lseg, hdr->pgio_mirror_idx),
1139 hdr->args.count, hdr->res.count);
1140
d67ae825
TH		 1141 if (test_bit(NFS_IOHDR_REDO, &hdr->flags) &&
1142 task->tk_status == 0) {
1143 nfs4_sequence_done(task, &hdr->res.seq_res);
1144 return;
1145 }
1146
1147 /* Note this may cause RPC to be resent */
1148 hdr->mds_ops->rpc_call_done(task, hdr);
1149}
1150
1151static void ff_layout_read_count_stats(struct rpc_task *task, void *data)
1152{
1153 struct nfs_pgio_header *hdr = data;
1154
1155 rpc_count_iostats_metrics(task,
1156 &NFS_CLIENT(hdr->inode)->cl_metrics[NFSPROC4_CLNT_READ]);
1157}
1158
1159static int ff_layout_write_done_cb(struct rpc_task *task,
1160 struct nfs_pgio_header *hdr)
1161{
1162 struct inode *inode;
1163 int err;
1164
1165 trace_nfs4_pnfs_write(hdr, task->tk_status);
1166 if (task->tk_status == -ETIMEDOUT && !hdr->res.op_status)
1167 hdr->res.op_status = NFS4ERR_NXIO;
1168 if (task->tk_status < 0 && hdr->res.op_status)
1169 ff_layout_io_track_ds_error(hdr->lseg, hdr->pgio_mirror_idx,
1170 hdr->args.offset, hdr->args.count,
1171 hdr->res.op_status, OP_WRITE);
1172 err = ff_layout_async_handle_error(task, hdr->args.context->state,
1173 hdr->ds_clp, hdr->lseg,
1174 hdr->pgio_mirror_idx);
1175
1176 switch (err) {
1177 case -NFS4ERR_RESET_TO_PNFS:
1178 case -NFS4ERR_RESET_TO_MDS:
1179 inode = hdr->lseg->pls_layout->plh_inode;
1180 pnfs_error_mark_layout_for_return(inode, hdr->lseg);
1181 if (err == -NFS4ERR_RESET_TO_PNFS) {
1182 pnfs_set_retry_layoutget(hdr->lseg->pls_layout);
1183 ff_layout_reset_write(hdr, true);
1184 } else {
1185 pnfs_clear_retry_layoutget(hdr->lseg->pls_layout);
1186 ff_layout_reset_write(hdr, false);
1187 }
1188 return task->tk_status;
1189 case -EAGAIN:
1190 rpc_restart_call_prepare(task);
1191 return -EAGAIN;
1192 }
1193
1194 if (hdr->res.verf->committed == NFS_FILE_SYNC ||
1195 hdr->res.verf->committed == NFS_DATA_SYNC)
1196 ff_layout_set_layoutcommit(hdr);
1197
69f230d9
PT		 1198 if (task->tk_status >= 0)
1199 nfs_writeback_update_inode(hdr);
1200
d67ae825
TH		 1201 return 0;
1202}
1203
1204static int ff_layout_commit_done_cb(struct rpc_task *task,
1205 struct nfs_commit_data *data)
1206{
1207 struct inode *inode;
1208 int err;
1209
1210 trace_nfs4_pnfs_commit_ds(data, task->tk_status);
1211 if (task->tk_status == -ETIMEDOUT && !data->res.op_status)
1212 data->res.op_status = NFS4ERR_NXIO;
1213 if (task->tk_status < 0 && data->res.op_status)
1214 ff_layout_io_track_ds_error(data->lseg, data->ds_commit_index,
1215 data->args.offset, data->args.count,
1216 data->res.op_status, OP_COMMIT);
1217 err = ff_layout_async_handle_error(task, NULL, data->ds_clp,
1218 data->lseg, data->ds_commit_index);
1219
1220 switch (err) {
1221 case -NFS4ERR_RESET_TO_PNFS:
1222 case -NFS4ERR_RESET_TO_MDS:
1223 inode = data->lseg->pls_layout->plh_inode;
1224 pnfs_error_mark_layout_for_return(inode, data->lseg);
1225 if (err == -NFS4ERR_RESET_TO_PNFS)
1226 pnfs_set_retry_layoutget(data->lseg->pls_layout);
1227 else
1228 pnfs_clear_retry_layoutget(data->lseg->pls_layout);
1229 pnfs_generic_prepare_to_resend_writes(data);
1230 return -EAGAIN;
1231 case -EAGAIN:
1232 rpc_restart_call_prepare(task);
1233 return -EAGAIN;
1234 }
1235
c0f5f505
TM		 1236 if (data->verf.committed == NFS_UNSTABLE
1237 && ff_layout_need_layoutcommit(data->lseg))
67af7611 1238 pnfs_set_layoutcommit(data->inode, data->lseg, data->lwb);
d67ae825
TH		 1239
1240 return 0;
1241}
1242
1243static int ff_layout_write_prepare_common(struct rpc_task *task,
1244 struct nfs_pgio_header *hdr)
1245{
abcb7bfc
TM		 1246 nfs4_ff_layout_stat_io_start_write(
1247 FF_LAYOUT_COMP(hdr->lseg, hdr->pgio_mirror_idx),
e76d28dd
TM		 1248 hdr->args.count,
1249 task->tk_start);
abcb7bfc 1250
d67ae825
TH		 1251 if (unlikely(test_bit(NFS_CONTEXT_BAD, &hdr->args.context->flags))) {
1252 rpc_exit(task, -EIO);
1253 return -EIO;
1254 }
1255
1256 if (ff_layout_reset_to_mds(hdr->lseg, hdr->pgio_mirror_idx)) {
1257 bool retry_pnfs;
1258
1259 retry_pnfs = ff_layout_has_available_ds(hdr->lseg);
1260 dprintk("%s task %u reset io to %s\n", __func__,
1261 task->tk_pid, retry_pnfs ? "pNFS" : "MDS");
1262 ff_layout_reset_write(hdr, retry_pnfs);
1263 rpc_exit(task, 0);
1264 return -EAGAIN;
1265 }
1266
1267 return 0;
1268}
1269
1270static void ff_layout_write_prepare_v3(struct rpc_task *task, void *data)
1271{
1272 struct nfs_pgio_header *hdr = data;
1273
1274 if (ff_layout_write_prepare_common(task, hdr))
1275 return;
1276
1277 rpc_call_start(task);
1278}
1279
1280static void ff_layout_write_prepare_v4(struct rpc_task *task, void *data)
1281{
1282 struct nfs_pgio_header *hdr = data;
1283
d67ae825
TH		 1284 if (ff_layout_setup_sequence(hdr->ds_clp,
1285 &hdr->args.seq_args,
1286 &hdr->res.seq_res,
1287 task))
1288 return;
1289
abcb7bfc
TM		 1290 if (ff_layout_write_prepare_common(task, hdr))
1291 return;
1292
d67ae825
TH		 1293 if (nfs4_set_rw_stateid(&hdr->args.stateid, hdr->args.context,
1294 hdr->args.lock_context, FMODE_WRITE) == -EIO)
1295 rpc_exit(task, -EIO); /* lost lock, terminate I/O */
1296}
1297
1298static void ff_layout_write_call_done(struct rpc_task *task, void *data)
1299{
1300 struct nfs_pgio_header *hdr = data;
1301
abcb7bfc
TM		 1302 nfs4_ff_layout_stat_io_end_write(task,
1303 FF_LAYOUT_COMP(hdr->lseg, hdr->pgio_mirror_idx),
1304 hdr->args.count, hdr->res.count,
1305 hdr->res.verf->committed);
1306
d67ae825
TH		 1307 if (test_bit(NFS_IOHDR_REDO, &hdr->flags) &&
1308 task->tk_status == 0) {
1309 nfs4_sequence_done(task, &hdr->res.seq_res);
1310 return;
1311 }
1312
1313 /* Note this may cause RPC to be resent */
1314 hdr->mds_ops->rpc_call_done(task, hdr);
1315}
1316
1317static void ff_layout_write_count_stats(struct rpc_task *task, void *data)
1318{
1319 struct nfs_pgio_header *hdr = data;
1320
1321 rpc_count_iostats_metrics(task,
1322 &NFS_CLIENT(hdr->inode)->cl_metrics[NFSPROC4_CLNT_WRITE]);
1323}
1324
abcb7bfc
TM		 1325static void ff_layout_commit_prepare_common(struct rpc_task *task,
1326 struct nfs_commit_data *cdata)
1327{
1328 nfs4_ff_layout_stat_io_start_write(
1329 FF_LAYOUT_COMP(cdata->lseg, cdata->ds_commit_index),
e76d28dd 1330 0, task->tk_start);
abcb7bfc
TM		 1331}
1332
d67ae825
TH		 1333static void ff_layout_commit_prepare_v3(struct rpc_task *task, void *data)
1334{
abcb7bfc 1335 ff_layout_commit_prepare_common(task, data);
d67ae825
TH		 1336 rpc_call_start(task);
1337}
1338
1339static void ff_layout_commit_prepare_v4(struct rpc_task *task, void *data)
1340{
1341 struct nfs_commit_data *wdata = data;
1342
abcb7bfc 1343 if (ff_layout_setup_sequence(wdata->ds_clp,
d67ae825
TH		 1344 &wdata->args.seq_args,
1345 &wdata->res.seq_res,
abcb7bfc
TM		 1346 task))
1347 return;
1348 ff_layout_commit_prepare_common(task, data);
1349}
1350
1351static void ff_layout_commit_done(struct rpc_task *task, void *data)
1352{
1353 struct nfs_commit_data *cdata = data;
1354 struct nfs_page *req;
1355 __u64 count = 0;
1356
1357 if (task->tk_status == 0) {
1358 list_for_each_entry(req, &cdata->pages, wb_list)
1359 count += req->wb_bytes;
1360 }
1361
1362 nfs4_ff_layout_stat_io_end_write(task,
1363 FF_LAYOUT_COMP(cdata->lseg, cdata->ds_commit_index),
1364 count, count, NFS_FILE_SYNC);
1365
1366 pnfs_generic_write_commit_done(task, data);
d67ae825
TH		 1367}
1368
1369static void ff_layout_commit_count_stats(struct rpc_task *task, void *data)
1370{
1371 struct nfs_commit_data *cdata = data;
1372
1373 rpc_count_iostats_metrics(task,
1374 &NFS_CLIENT(cdata->inode)->cl_metrics[NFSPROC4_CLNT_COMMIT]);
1375}
1376
1377static const struct rpc_call_ops ff_layout_read_call_ops_v3 = {
1378 .rpc_call_prepare = ff_layout_read_prepare_v3,
1379 .rpc_call_done = ff_layout_read_call_done,
1380 .rpc_count_stats = ff_layout_read_count_stats,
1381 .rpc_release = pnfs_generic_rw_release,
1382};
1383
1384static const struct rpc_call_ops ff_layout_read_call_ops_v4 = {
1385 .rpc_call_prepare = ff_layout_read_prepare_v4,
1386 .rpc_call_done = ff_layout_read_call_done,
1387 .rpc_count_stats = ff_layout_read_count_stats,
1388 .rpc_release = pnfs_generic_rw_release,
1389};
1390
1391static const struct rpc_call_ops ff_layout_write_call_ops_v3 = {
1392 .rpc_call_prepare = ff_layout_write_prepare_v3,
1393 .rpc_call_done = ff_layout_write_call_done,
1394 .rpc_count_stats = ff_layout_write_count_stats,
1395 .rpc_release = pnfs_generic_rw_release,
1396};
1397
1398static const struct rpc_call_ops ff_layout_write_call_ops_v4 = {
1399 .rpc_call_prepare = ff_layout_write_prepare_v4,
1400 .rpc_call_done = ff_layout_write_call_done,
1401 .rpc_count_stats = ff_layout_write_count_stats,
1402 .rpc_release = pnfs_generic_rw_release,
1403};
1404
1405static const struct rpc_call_ops ff_layout_commit_call_ops_v3 = {
1406 .rpc_call_prepare = ff_layout_commit_prepare_v3,
abcb7bfc 1407 .rpc_call_done = ff_layout_commit_done,
d67ae825
TH		 1408 .rpc_count_stats = ff_layout_commit_count_stats,
1409 .rpc_release = pnfs_generic_commit_release,
1410};
1411
1412static const struct rpc_call_ops ff_layout_commit_call_ops_v4 = {
1413 .rpc_call_prepare = ff_layout_commit_prepare_v4,
abcb7bfc 1414 .rpc_call_done = ff_layout_commit_done,
d67ae825
TH		 1415 .rpc_count_stats = ff_layout_commit_count_stats,
1416 .rpc_release = pnfs_generic_commit_release,
1417};
1418
1419static enum pnfs_try_status
1420ff_layout_read_pagelist(struct nfs_pgio_header *hdr)
1421{
1422 struct pnfs_layout_segment *lseg = hdr->lseg;
1423 struct nfs4_pnfs_ds *ds;
1424 struct rpc_clnt *ds_clnt;
1425 struct rpc_cred *ds_cred;
1426 loff_t offset = hdr->args.offset;
1427 u32 idx = hdr->pgio_mirror_idx;
1428 int vers;
1429 struct nfs_fh *fh;
1430
1431 dprintk("--> %s ino %lu pgbase %u req %Zu@%llu\n",
1432 __func__, hdr->inode->i_ino,
1433 hdr->args.pgbase, (size_t)hdr->args.count, offset);
1434
1435 ds = nfs4_ff_layout_prepare_ds(lseg, idx, false);
1436 if (!ds)
1437 goto out_failed;
1438
1439 ds_clnt = nfs4_ff_find_or_create_ds_client(lseg, idx, ds->ds_clp,
1440 hdr->inode);
1441 if (IS_ERR(ds_clnt))
1442 goto out_failed;
1443
1444 ds_cred = ff_layout_get_ds_cred(lseg, idx, hdr->cred);
1445 if (IS_ERR(ds_cred))
1446 goto out_failed;
1447
1448 vers = nfs4_ff_layout_ds_version(lseg, idx);
1449
1450 dprintk("%s USE DS: %s cl_count %d vers %d\n", __func__,
1451 ds->ds_remotestr, atomic_read(&ds->ds_clp->cl_count), vers);
1452
1453 atomic_inc(&ds->ds_clp->cl_count);
1454 hdr->ds_clp = ds->ds_clp;
1455 fh = nfs4_ff_layout_select_ds_fh(lseg, idx);
1456 if (fh)
1457 hdr->args.fh = fh;
d67ae825
TH		 1458 /*
1459 * Note that if we ever decide to split across DSes,
1460 * then we may need to handle dense-like offsets.
1461 */
1462 hdr->args.offset = offset;
1463 hdr->mds_offset = offset;
1464
1465 /* Perform an asynchronous read to ds */
1466 nfs_initiate_pgio(ds_clnt, hdr, ds_cred, ds->ds_clp->rpc_ops,
1467 vers == 3 ? &ff_layout_read_call_ops_v3 :
1468 &ff_layout_read_call_ops_v4,
1469 0, RPC_TASK_SOFTCONN);
1470
1471 return PNFS_ATTEMPTED;
1472
1473out_failed:
1474 if (ff_layout_has_available_ds(lseg))
1475 return PNFS_TRY_AGAIN;
1476 return PNFS_NOT_ATTEMPTED;
1477}
1478
1479/* Perform async writes. */
1480static enum pnfs_try_status
1481ff_layout_write_pagelist(struct nfs_pgio_header *hdr, int sync)
1482{
1483 struct pnfs_layout_segment *lseg = hdr->lseg;
1484 struct nfs4_pnfs_ds *ds;
1485 struct rpc_clnt *ds_clnt;
1486 struct rpc_cred *ds_cred;
1487 loff_t offset = hdr->args.offset;
1488 int vers;
1489 struct nfs_fh *fh;
1490 int idx = hdr->pgio_mirror_idx;
1491
1492 ds = nfs4_ff_layout_prepare_ds(lseg, idx, true);
1493 if (!ds)
1494 return PNFS_NOT_ATTEMPTED;
1495
1496 ds_clnt = nfs4_ff_find_or_create_ds_client(lseg, idx, ds->ds_clp,
1497 hdr->inode);
1498 if (IS_ERR(ds_clnt))
1499 return PNFS_NOT_ATTEMPTED;
1500
1501 ds_cred = ff_layout_get_ds_cred(lseg, idx, hdr->cred);
1502 if (IS_ERR(ds_cred))
1503 return PNFS_NOT_ATTEMPTED;
1504
1505 vers = nfs4_ff_layout_ds_version(lseg, idx);
1506
1507 dprintk("%s ino %lu sync %d req %Zu@%llu DS: %s cl_count %d vers %d\n",
1508 __func__, hdr->inode->i_ino, sync, (size_t) hdr->args.count,
1509 offset, ds->ds_remotestr, atomic_read(&ds->ds_clp->cl_count),
1510 vers);
1511
1512 hdr->pgio_done_cb = ff_layout_write_done_cb;
1513 atomic_inc(&ds->ds_clp->cl_count);
1514 hdr->ds_clp = ds->ds_clp;
1515 hdr->ds_commit_idx = idx;
1516 fh = nfs4_ff_layout_select_ds_fh(lseg, idx);
1517 if (fh)
1518 hdr->args.fh = fh;
1519
1520 /*
1521 * Note that if we ever decide to split across DSes,
1522 * then we may need to handle dense-like offsets.
1523 */
1524 hdr->args.offset = offset;
1525
1526 /* Perform an asynchronous write */
1527 nfs_initiate_pgio(ds_clnt, hdr, ds_cred, ds->ds_clp->rpc_ops,
1528 vers == 3 ? &ff_layout_write_call_ops_v3 :
1529 &ff_layout_write_call_ops_v4,
1530 sync, RPC_TASK_SOFTCONN);
1531 return PNFS_ATTEMPTED;
1532}
1533
d67ae825
TH		 1534static u32 calc_ds_index_from_commit(struct pnfs_layout_segment *lseg, u32 i)
1535{
1536 return i;
1537}
1538
1539static struct nfs_fh *
1540select_ds_fh_from_commit(struct pnfs_layout_segment *lseg, u32 i)
1541{
1542 struct nfs4_ff_layout_segment *flseg = FF_LAYOUT_LSEG(lseg);
1543
1544 /* FIXME: Assume that there is only one NFS version available
1545 * for the DS.
1546 */
1547 return &flseg->mirror_array[i]->fh_versions[0];
1548}
1549
1550static int ff_layout_initiate_commit(struct nfs_commit_data *data, int how)
1551{
1552 struct pnfs_layout_segment *lseg = data->lseg;
1553 struct nfs4_pnfs_ds *ds;
1554 struct rpc_clnt *ds_clnt;
1555 struct rpc_cred *ds_cred;
1556 u32 idx;
1557 int vers;
1558 struct nfs_fh *fh;
1559
1560 idx = calc_ds_index_from_commit(lseg, data->ds_commit_index);
1561 ds = nfs4_ff_layout_prepare_ds(lseg, idx, true);
1562 if (!ds)
1563 goto out_err;
1564
1565 ds_clnt = nfs4_ff_find_or_create_ds_client(lseg, idx, ds->ds_clp,
1566 data->inode);
1567 if (IS_ERR(ds_clnt))
1568 goto out_err;
1569
1570 ds_cred = ff_layout_get_ds_cred(lseg, idx, data->cred);
1571 if (IS_ERR(ds_cred))
1572 goto out_err;
1573
1574 vers = nfs4_ff_layout_ds_version(lseg, idx);
1575
1576 dprintk("%s ino %lu, how %d cl_count %d vers %d\n", __func__,
1577 data->inode->i_ino, how, atomic_read(&ds->ds_clp->cl_count),
1578 vers);
1579 data->commit_done_cb = ff_layout_commit_done_cb;
1580 data->cred = ds_cred;
1581 atomic_inc(&ds->ds_clp->cl_count);
1582 data->ds_clp = ds->ds_clp;
1583 fh = select_ds_fh_from_commit(lseg, data->ds_commit_index);
1584 if (fh)
1585 data->args.fh = fh;
abcb7bfc 1586
d67ae825
TH		 1587 return nfs_initiate_commit(ds_clnt, data, ds->ds_clp->rpc_ops,
1588 vers == 3 ? &ff_layout_commit_call_ops_v3 :
1589 &ff_layout_commit_call_ops_v4,
1590 how, RPC_TASK_SOFTCONN);
1591out_err:
1592 pnfs_generic_prepare_to_resend_writes(data);
1593 pnfs_generic_commit_release(data);
1594 return -EAGAIN;
1595}
1596
1597static int
1598ff_layout_commit_pagelist(struct inode *inode, struct list_head *mds_pages,
1599 int how, struct nfs_commit_info *cinfo)
1600{
1601 return pnfs_generic_commit_pagelist(inode, mds_pages, how, cinfo,
1602 ff_layout_initiate_commit);
1603}
1604
1605static struct pnfs_ds_commit_info *
1606ff_layout_get_ds_info(struct inode *inode)
1607{
1608 struct pnfs_layout_hdr *layout = NFS_I(inode)->layout;
1609
1610 if (layout == NULL)
1611 return NULL;
1612
1613 return &FF_LAYOUT_FROM_HDR(layout)->commit_info;
1614}
1615
1616static void
fc87701b 1617ff_layout_free_deviceid_node(struct nfs4_deviceid_node *d)
d67ae825
TH		 1618{
1619 nfs4_ff_layout_free_deviceid(container_of(d, struct nfs4_ff_layout_ds,
1620 id_node));
1621}
1622
1623static int ff_layout_encode_ioerr(struct nfs4_flexfile_layout *flo,
1624 struct xdr_stream *xdr,
1625 const struct nfs4_layoutreturn_args *args)
1626{
1627 struct pnfs_layout_hdr *hdr = &flo->generic_hdr;
1628 __be32 *start;
1629 int count = 0, ret = 0;
1630
1631 start = xdr_reserve_space(xdr, 4);
1632 if (unlikely(!start))
1633 return -E2BIG;
1634
1635 /* This assume we always return _ALL_ layouts */
1636 spin_lock(&hdr->plh_inode->i_lock);
1637 ret = ff_layout_encode_ds_ioerr(flo, xdr, &count, &args->range);
1638 spin_unlock(&hdr->plh_inode->i_lock);
1639
1640 *start = cpu_to_be32(count);
1641
1642 return ret;
1643}
1644
1645/* report nothing for now */
1646static void ff_layout_encode_iostats(struct nfs4_flexfile_layout *flo,
1647 struct xdr_stream *xdr,
1648 const struct nfs4_layoutreturn_args *args)
1649{
1650 __be32 *p;
1651
1652 p = xdr_reserve_space(xdr, 4);
1653 if (likely(p))
1654 *p = cpu_to_be32(0);
1655}
1656
1657static struct nfs4_deviceid_node *
1658ff_layout_alloc_deviceid_node(struct nfs_server *server,
1659 struct pnfs_device *pdev, gfp_t gfp_flags)
1660{
1661 struct nfs4_ff_layout_ds *dsaddr;
1662
1663 dsaddr = nfs4_ff_alloc_deviceid_node(server, pdev, gfp_flags);
1664 if (!dsaddr)
1665 return NULL;
1666 return &dsaddr->id_node;
1667}
1668
1669static void
1670ff_layout_encode_layoutreturn(struct pnfs_layout_hdr *lo,
1671 struct xdr_stream *xdr,
1672 const struct nfs4_layoutreturn_args *args)
1673{
1674 struct nfs4_flexfile_layout *flo = FF_LAYOUT_FROM_HDR(lo);
1675 __be32 *start;
1676
1677 dprintk("%s: Begin\n", __func__);
1678 start = xdr_reserve_space(xdr, 4);
1679 BUG_ON(!start);
1680
1681 if (ff_layout_encode_ioerr(flo, xdr, args))
1682 goto out;
1683
1684 ff_layout_encode_iostats(flo, xdr, args);
1685out:
1686 *start = cpu_to_be32((xdr->p - start - 1) * 4);
1687 dprintk("%s: Return\n", __func__);
1688}
1689
27c43064
PT		 1690static int
1691ff_layout_ntop4(const struct sockaddr *sap, char *buf, const size_t buflen)
1692{
1693 const struct sockaddr_in *sin = (struct sockaddr_in *)sap;
1694
1695 return snprintf(buf, buflen, "%pI4", &sin->sin_addr);
1696}
1697
1698static size_t
1699ff_layout_ntop6_noscopeid(const struct sockaddr *sap, char *buf,
1700 const int buflen)
1701{
1702 const struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)sap;
1703 const struct in6_addr *addr = &sin6->sin6_addr;
1704
1705 /*
1706 * RFC 4291, Section 2.2.2
1707 *
1708 * Shorthanded ANY address
1709 */
1710 if (ipv6_addr_any(addr))
1711 return snprintf(buf, buflen, "::");
1712
1713 /*
1714 * RFC 4291, Section 2.2.2
1715 *
1716 * Shorthanded loopback address
1717 */
1718 if (ipv6_addr_loopback(addr))
1719 return snprintf(buf, buflen, "::1");
1720
1721 /*
1722 * RFC 4291, Section 2.2.3
1723 *
1724 * Special presentation address format for mapped v4
1725 * addresses.
1726 */
1727 if (ipv6_addr_v4mapped(addr))
1728 return snprintf(buf, buflen, "::ffff:%pI4",
1729 &addr->s6_addr32[3]);
1730
1731 /*
1732 * RFC 4291, Section 2.2.1
1733 */
1734 return snprintf(buf, buflen, "%pI6c", addr);
1735}
1736
1737/* Derived from rpc_sockaddr2uaddr */
1738static void
1739ff_layout_encode_netaddr(struct xdr_stream *xdr, struct nfs4_pnfs_ds_addr *da)
1740{
1741 struct sockaddr *sap = (struct sockaddr *)&da->da_addr;
1742 char portbuf[RPCBIND_MAXUADDRPLEN];
1743 char addrbuf[RPCBIND_MAXUADDRLEN];
1744 char *netid;
1745 unsigned short port;
1746 int len, netid_len;
1747 __be32 *p;
1748
1749 switch (sap->sa_family) {
1750 case AF_INET:
1751 if (ff_layout_ntop4(sap, addrbuf, sizeof(addrbuf)) == 0)
1752 return;
1753 port = ntohs(((struct sockaddr_in *)sap)->sin_port);
1754 netid = "tcp";
1755 netid_len = 3;
1756 break;
1757 case AF_INET6:
1758 if (ff_layout_ntop6_noscopeid(sap, addrbuf, sizeof(addrbuf)) == 0)
1759 return;
1760 port = ntohs(((struct sockaddr_in6 *)sap)->sin6_port);
1761 netid = "tcp6";
1762 netid_len = 4;
1763 break;
1764 default:
1765 /* we only support tcp and tcp6 */
1766 WARN_ON_ONCE(1);
1767 return;
1768 }
1769
1770 snprintf(portbuf, sizeof(portbuf), ".%u.%u", port >> 8, port & 0xff);
1771 len = strlcat(addrbuf, portbuf, sizeof(addrbuf));
1772
1773 p = xdr_reserve_space(xdr, 4 + netid_len);
1774 xdr_encode_opaque(p, netid, netid_len);
1775
1776 p = xdr_reserve_space(xdr, 4 + len);
1777 xdr_encode_opaque(p, addrbuf, len);
1778}
1779
1780static void
1781ff_layout_encode_nfstime(struct xdr_stream *xdr,
1782 ktime_t t)
1783{
1784 struct timespec64 ts;
1785 __be32 *p;
1786
1787 p = xdr_reserve_space(xdr, 12);
1788 ts = ktime_to_timespec64(t);
1789 p = xdr_encode_hyper(p, ts.tv_sec);
1790 *p++ = cpu_to_be32(ts.tv_nsec);
1791}
1792
1793static void
1794ff_layout_encode_io_latency(struct xdr_stream *xdr,
1795 struct nfs4_ff_io_stat *stat)
1796{
1797 __be32 *p;
1798
1799 p = xdr_reserve_space(xdr, 5 * 8);
1800 p = xdr_encode_hyper(p, stat->ops_requested);
1801 p = xdr_encode_hyper(p, stat->bytes_requested);
1802 p = xdr_encode_hyper(p, stat->ops_completed);
1803 p = xdr_encode_hyper(p, stat->bytes_completed);
1804 p = xdr_encode_hyper(p, stat->bytes_not_delivered);
1805 ff_layout_encode_nfstime(xdr, stat->total_busy_time);
1806 ff_layout_encode_nfstime(xdr, stat->aggregate_completion_time);
1807}
1808
1809static void
1810ff_layout_encode_layoutstats(struct xdr_stream *xdr,
1811 struct nfs42_layoutstat_args *args,
1812 struct nfs42_layoutstat_devinfo *devinfo)
1813{
1814 struct nfs4_ff_layout_mirror *mirror = devinfo->layout_private;
1815 struct nfs4_pnfs_ds_addr *da;
1816 struct nfs4_pnfs_ds *ds = mirror->mirror_ds->ds;
1817 struct nfs_fh *fh = &mirror->fh_versions[0];
1818 __be32 *p, *start;
1819
1820 da = list_first_entry(&ds->ds_addrs, struct nfs4_pnfs_ds_addr, da_node);
1821 dprintk("%s: DS %s: encoding address %s\n",
1822 __func__, ds->ds_remotestr, da->da_remotestr);
1823 /* layoutupdate length */
1824 start = xdr_reserve_space(xdr, 4);
1825 /* netaddr4 */
1826 ff_layout_encode_netaddr(xdr, da);
1827 /* nfs_fh4 */
1828 p = xdr_reserve_space(xdr, 4 + fh->size);
1829 xdr_encode_opaque(p, fh->data, fh->size);
1830 /* ff_io_latency4 read */
1831 spin_lock(&mirror->lock);
1832 ff_layout_encode_io_latency(xdr, &mirror->read_stat.io_stat);
1833 /* ff_io_latency4 write */
1834 ff_layout_encode_io_latency(xdr, &mirror->write_stat.io_stat);
1835 spin_unlock(&mirror->lock);
1836 /* nfstime4 */
1837 ff_layout_encode_nfstime(xdr, ktime_sub(ktime_get(), mirror->start_time));
1838 /* bool */
1839 p = xdr_reserve_space(xdr, 4);
1840 *p = cpu_to_be32(false);
1841
1842 *start = cpu_to_be32((xdr->p - start - 1) * 4);
1843}
1844
ad4dc53e
PT		 1845static bool
1846ff_layout_mirror_prepare_stats(struct nfs42_layoutstat_args *args,
1847 struct pnfs_layout_segment *pls,
1848 int *dev_count, int dev_limit)
1849{
1850 struct nfs4_ff_layout_mirror *mirror;
1851 struct nfs4_deviceid_node *dev;
1852 struct nfs42_layoutstat_devinfo *devinfo;
1853 int i;
1854
690edcfa 1855 for (i = 0; i < FF_LAYOUT_MIRROR_COUNT(pls); i++) {
ad4dc53e
PT		 1856 if (*dev_count >= dev_limit)
1857 break;
1858 mirror = FF_LAYOUT_COMP(pls, i);
27c43064
PT		 1859 if (!mirror || !mirror->mirror_ds)
1860 continue;
ad4dc53e
PT		 1861 dev = FF_LAYOUT_DEVID_NODE(pls, i);
1862 devinfo = &args->devinfo[*dev_count];
1863 memcpy(&devinfo->dev_id, &dev->deviceid, NFS4_DEVICEID4_SIZE);
1864 devinfo->offset = pls->pls_range.offset;
1865 devinfo->length = pls->pls_range.length;
d099d7b8 1866 devinfo->read_count = mirror->read_stat.io_stat.ops_completed;
ad4dc53e 1867 devinfo->read_bytes = mirror->read_stat.io_stat.bytes_completed;
d099d7b8 1868 devinfo->write_count = mirror->write_stat.io_stat.ops_completed;
ad4dc53e
PT		 1869 devinfo->write_bytes = mirror->write_stat.io_stat.bytes_completed;
1870 devinfo->layout_type = LAYOUT_FLEX_FILES;
27c43064
PT		 1871 devinfo->layoutstats_encode = ff_layout_encode_layoutstats;
1872 devinfo->layout_private = mirror;
1873 /* lseg refcount put in cleanup_layoutstats */
1874 pnfs_get_lseg(pls);
ad4dc53e
PT		 1875
1876 ++(*dev_count);
1877 }
1878
1879 return *dev_count < dev_limit;
1880}
1881
1882static int
1883ff_layout_prepare_layoutstats(struct nfs42_layoutstat_args *args)
1884{
1885 struct pnfs_layout_segment *pls;
1886 int dev_count = 0;
1887
1888 spin_lock(&args->inode->i_lock);
1889 list_for_each_entry(pls, &NFS_I(args->inode)->layout->plh_segs, pls_list) {
1890 dev_count += FF_LAYOUT_MIRROR_COUNT(pls);
1891 }
1892 spin_unlock(&args->inode->i_lock);
1893 /* For now, send at most PNFS_LAYOUTSTATS_MAXDEV statistics */
1894 if (dev_count > PNFS_LAYOUTSTATS_MAXDEV) {
1895 dprintk("%s: truncating devinfo to limit (%d:%d)\n",
1896 __func__, dev_count, PNFS_LAYOUTSTATS_MAXDEV);
1897 dev_count = PNFS_LAYOUTSTATS_MAXDEV;
1898 }
1899 args->devinfo = kmalloc(dev_count * sizeof(*args->devinfo), GFP_KERNEL);
1900 if (!args->devinfo)
1901 return -ENOMEM;
1902
1903 dev_count = 0;
1904 spin_lock(&args->inode->i_lock);
1905 list_for_each_entry(pls, &NFS_I(args->inode)->layout->plh_segs, pls_list) {
1906 if (!ff_layout_mirror_prepare_stats(args, pls, &dev_count,
1907 PNFS_LAYOUTSTATS_MAXDEV)) {
1908 break;
1909 }
1910 }
1911 spin_unlock(&args->inode->i_lock);
1912 args->num_dev = dev_count;
1913
1914 return 0;
1915}
1916
27c43064
PT		 1917static void
1918ff_layout_cleanup_layoutstats(struct nfs42_layoutstat_data *data)
1919{
1920 struct nfs4_ff_layout_mirror *mirror;
1921 int i;
1922
1923 for (i = 0; i < data->args.num_dev; i++) {
1924 mirror = data->args.devinfo[i].layout_private;
1925 data->args.devinfo[i].layout_private = NULL;
1926 pnfs_put_lseg(mirror->lseg);
1927 }
1928}
1929
d67ae825
TH		 1930static struct pnfs_layoutdriver_type flexfilelayout_type = {
1931 .id = LAYOUT_FLEX_FILES,
1932 .name = "LAYOUT_FLEX_FILES",
1933 .owner = THIS_MODULE,
1934 .alloc_layout_hdr = ff_layout_alloc_layout_hdr,
1935 .free_layout_hdr = ff_layout_free_layout_hdr,
1936 .alloc_lseg = ff_layout_alloc_lseg,
1937 .free_lseg = ff_layout_free_lseg,
1938 .pg_read_ops = &ff_layout_pg_read_ops,
1939 .pg_write_ops = &ff_layout_pg_write_ops,
1940 .get_ds_info = ff_layout_get_ds_info,
fc87701b 1941 .free_deviceid_node = ff_layout_free_deviceid_node,
338d00cf 1942 .mark_request_commit = pnfs_layout_mark_request_commit,
d67ae825
TH		 1943 .clear_request_commit = pnfs_generic_clear_request_commit,
1944 .scan_commit_lists = pnfs_generic_scan_commit_lists,
1945 .recover_commit_reqs = pnfs_generic_recover_commit_reqs,
1946 .commit_pagelist = ff_layout_commit_pagelist,
1947 .read_pagelist = ff_layout_read_pagelist,
1948 .write_pagelist = ff_layout_write_pagelist,
1949 .alloc_deviceid_node = ff_layout_alloc_deviceid_node,
1950 .encode_layoutreturn = ff_layout_encode_layoutreturn,
5bb89b47 1951 .sync = pnfs_nfs_generic_sync,
ad4dc53e 1952 .prepare_layoutstats = ff_layout_prepare_layoutstats,
27c43064 1953 .cleanup_layoutstats = ff_layout_cleanup_layoutstats,
d67ae825
TH		 1954};
1955
1956static int __init nfs4flexfilelayout_init(void)
1957{
1958 printk(KERN_INFO "%s: NFSv4 Flexfile Layout Driver Registering...\n",
1959 __func__);
1960 return pnfs_register_layoutdriver(&flexfilelayout_type);
1961}
1962
1963static void __exit nfs4flexfilelayout_exit(void)
1964{
1965 printk(KERN_INFO "%s: NFSv4 Flexfile Layout Driver Unregistering...\n",
1966 __func__);
1967 pnfs_unregister_layoutdriver(&flexfilelayout_type);
1968}
1969
1970MODULE_ALIAS("nfs-layouttype4-4");
1971
1972MODULE_LICENSE("GPL");
1973MODULE_DESCRIPTION("The NFSv4 flexfile layout driver");
1974
1975module_init(nfs4flexfilelayout_init);
1976module_exit(nfs4flexfilelayout_exit);
Ubuntu Jammy Linux kernel mirror