1 // SPDX-License-Identifier: GPL-2.0-only
3 * Module for pnfs flexfile layout driver.
5 * Copyright (c) 2014, Primary Data, Inc. All rights reserved.
7 * Tao Peng <bergwolf@primarydata.com>
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>
16 #include <linux/sunrpc/metrics.h>
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"
28 #define NFSDBG_FACILITY NFSDBG_PNFS_LD
30 #define FF_LAYOUT_POLL_RETRY_MAX (15*HZ)
31 #define FF_LAYOUTRETURN_MAXERR 20
33 static unsigned short io_maxretrans;
35 static const struct pnfs_commit_ops ff_layout_commit_ops;
36 static void ff_layout_read_record_layoutstats_done(struct rpc_task *task,
37 struct nfs_pgio_header *hdr);
38 static int ff_layout_mirror_prepare_stats(struct pnfs_layout_hdr *lo,
39 struct nfs42_layoutstat_devinfo *devinfo,
41 static void ff_layout_encode_ff_layoutupdate(struct xdr_stream *xdr,
42 const struct nfs42_layoutstat_devinfo *devinfo,
43 struct nfs4_ff_layout_mirror *mirror);
45 static struct pnfs_layout_hdr *
46 ff_layout_alloc_layout_hdr(struct inode *inode, gfp_t gfp_flags)
48 struct nfs4_flexfile_layout *ffl;
50 ffl = kzalloc(sizeof(*ffl), gfp_flags);
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;
63 ff_layout_free_layout_hdr(struct pnfs_layout_hdr *lo)
65 struct nfs4_flexfile_layout *ffl = FF_LAYOUT_FROM_HDR(lo);
66 struct nfs4_ff_layout_ds_err *err, *n;
68 list_for_each_entry_safe(err, n, &ffl->error_list, list) {
72 kfree_rcu(ffl, generic_hdr.plh_rcu);
75 static int decode_pnfs_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
79 p = xdr_inline_decode(xdr, NFS4_STATEID_SIZE);
80 if (unlikely(p == NULL))
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]);
89 static int decode_deviceid(struct xdr_stream *xdr, struct nfs4_deviceid *devid)
93 p = xdr_inline_decode(xdr, NFS4_DEVICEID4_SIZE);
96 memcpy(devid, p, NFS4_DEVICEID4_SIZE);
97 nfs4_print_deviceid(devid);
101 static int decode_nfs_fh(struct xdr_stream *xdr, struct nfs_fh *fh)
105 p = xdr_inline_decode(xdr, 4);
108 fh->size = be32_to_cpup(p++);
109 if (fh->size > NFS_MAXFHSIZE) {
110 printk(KERN_ERR "NFS flexfiles: Too big fh received %d\n",
115 p = xdr_inline_decode(xdr, fh->size);
118 memcpy(&fh->data, p, fh->size);
119 dprintk("%s: fh len %d\n", __func__, fh->size);
125 * Currently only stringified uids and gids are accepted.
126 * I.e., kerberos is not supported to the DSes, so no pricipals.
128 * That means that one common function will suffice, but when
129 * principals are added, this should be split to accomodate
130 * calls to both nfs_map_name_to_uid() and nfs_map_group_to_gid().
133 decode_name(struct xdr_stream *xdr, u32 *id)
138 /* opaque_length(4)*/
139 p = xdr_inline_decode(xdr, 4);
142 len = be32_to_cpup(p++);
146 dprintk("%s: len %u\n", __func__, len);
149 p = xdr_inline_decode(xdr, len);
153 if (!nfs_map_string_to_numeric((char *)p, len, id))
159 static bool ff_mirror_match_fh(const struct nfs4_ff_layout_mirror *m1,
160 const struct nfs4_ff_layout_mirror *m2)
164 if (m1->fh_versions_cnt != m2->fh_versions_cnt)
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) {
181 static struct nfs4_ff_layout_mirror *
182 ff_layout_add_mirror(struct pnfs_layout_hdr *lo,
183 struct nfs4_ff_layout_mirror *mirror)
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;
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)
193 if (!ff_mirror_match_fh(mirror, pos))
195 if (refcount_inc_not_zero(&pos->ref)) {
196 spin_unlock(&inode->i_lock);
200 list_add(&mirror->mirrors, &ff_layout->mirrors);
202 spin_unlock(&inode->i_lock);
207 ff_layout_remove_mirror(struct nfs4_ff_layout_mirror *mirror)
210 if (mirror->layout == NULL)
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;
219 static struct nfs4_ff_layout_mirror *ff_layout_alloc_mirror(gfp_t gfp_flags)
221 struct nfs4_ff_layout_mirror *mirror;
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);
232 static void ff_layout_free_mirror(struct nfs4_ff_layout_mirror *mirror)
234 const struct cred *cred;
236 ff_layout_remove_mirror(mirror);
237 kfree(mirror->fh_versions);
238 cred = rcu_access_pointer(mirror->ro_cred);
240 cred = rcu_access_pointer(mirror->rw_cred);
242 nfs4_ff_layout_put_deviceid(mirror->mirror_ds);
246 static void ff_layout_put_mirror(struct nfs4_ff_layout_mirror *mirror)
248 if (mirror != NULL && refcount_dec_and_test(&mirror->ref))
249 ff_layout_free_mirror(mirror);
252 static void ff_layout_free_mirror_array(struct nfs4_ff_layout_segment *fls)
256 for (i = 0; i < fls->mirror_array_cnt; i++)
257 ff_layout_put_mirror(fls->mirror_array[i]);
260 static void _ff_layout_free_lseg(struct nfs4_ff_layout_segment *fls)
263 ff_layout_free_mirror_array(fls);
269 ff_lseg_match_mirrors(struct pnfs_layout_segment *l1,
270 struct pnfs_layout_segment *l2)
272 const struct nfs4_ff_layout_segment *fl1 = FF_LAYOUT_LSEG(l1);
273 const struct nfs4_ff_layout_segment *fl2 = FF_LAYOUT_LSEG(l1);
276 if (fl1->mirror_array_cnt != fl2->mirror_array_cnt)
278 for (i = 0; i < fl1->mirror_array_cnt; i++) {
279 if (fl1->mirror_array[i] != fl2->mirror_array[i])
286 ff_lseg_range_is_after(const struct pnfs_layout_range *l1,
287 const struct pnfs_layout_range *l2)
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)
297 if (end2 < l1->offset)
299 return l2->offset <= l1->offset;
303 ff_lseg_merge(struct pnfs_layout_segment *new,
304 struct pnfs_layout_segment *old)
306 u64 new_end, old_end;
308 if (test_bit(NFS_LSEG_LAYOUTRETURN, &old->pls_flags))
310 if (new->pls_range.iomode != old->pls_range.iomode)
312 old_end = pnfs_calc_offset_end(old->pls_range.offset,
313 old->pls_range.length);
314 if (old_end < new->pls_range.offset)
316 new_end = pnfs_calc_offset_end(new->pls_range.offset,
317 new->pls_range.length);
318 if (new_end < old->pls_range.offset)
320 if (!ff_lseg_match_mirrors(new, old))
323 /* Mergeable: copy info from 'old' to 'new' */
324 if (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,
330 if (test_bit(NFS_LSEG_ROC, &old->pls_flags))
331 set_bit(NFS_LSEG_ROC, &new->pls_flags);
336 ff_layout_add_lseg(struct pnfs_layout_hdr *lo,
337 struct pnfs_layout_segment *lseg,
338 struct list_head *free_me)
340 pnfs_generic_layout_insert_lseg(lo, lseg,
341 ff_lseg_range_is_after,
346 static void ff_layout_sort_mirrors(struct nfs4_ff_layout_segment *fls)
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]);
359 static struct pnfs_layout_segment *
360 ff_layout_alloc_lseg(struct pnfs_layout_hdr *lh,
361 struct nfs4_layoutget_res *lgr,
364 struct pnfs_layout_segment *ret;
365 struct nfs4_ff_layout_segment *fls = NULL;
366 struct xdr_stream stream;
368 struct page *scratch;
370 u32 mirror_array_cnt;
374 dprintk("--> %s\n", __func__);
375 scratch = alloc_page(gfp_flags);
377 return ERR_PTR(-ENOMEM);
379 xdr_init_decode_pages(&stream, &buf, lgr->layoutp->pages,
381 xdr_set_scratch_buffer(&stream, page_address(scratch), PAGE_SIZE);
383 /* stripe unit and mirror_array_cnt */
385 p = xdr_inline_decode(&stream, 8 + 4);
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);
394 if (mirror_array_cnt > NFS4_FLEXFILE_LAYOUT_MAX_MIRROR_CNT ||
395 mirror_array_cnt == 0)
399 fls = kzalloc(struct_size(fls, mirror_array, mirror_array_cnt),
404 fls->mirror_array_cnt = mirror_array_cnt;
405 fls->stripe_unit = stripe_unit;
407 for (i = 0; i < fls->mirror_array_cnt; i++) {
408 struct nfs4_ff_layout_mirror *mirror;
410 const struct cred __rcu *cred;
413 u32 ds_count, fh_count, id;
417 p = xdr_inline_decode(&stream, 4);
420 ds_count = be32_to_cpup(p);
422 /* FIXME: allow for striping? */
426 fls->mirror_array[i] = ff_layout_alloc_mirror(gfp_flags);
427 if (fls->mirror_array[i] == NULL) {
432 fls->mirror_array[i]->ds_count = ds_count;
435 rc = decode_deviceid(&stream, &fls->mirror_array[i]->devid);
441 p = xdr_inline_decode(&stream, 4);
444 fls->mirror_array[i]->efficiency = be32_to_cpup(p);
447 rc = decode_pnfs_stateid(&stream, &fls->mirror_array[i]->stateid);
453 p = xdr_inline_decode(&stream, 4);
456 fh_count = be32_to_cpup(p);
458 fls->mirror_array[i]->fh_versions =
459 kcalloc(fh_count, sizeof(struct nfs_fh),
461 if (fls->mirror_array[i]->fh_versions == NULL) {
466 for (j = 0; j < fh_count; j++) {
467 rc = decode_nfs_fh(&stream,
468 &fls->mirror_array[i]->fh_versions[j]);
473 fls->mirror_array[i]->fh_versions_cnt = fh_count;
476 rc = decode_name(&stream, &id);
480 uid = make_kuid(&init_user_ns, id);
483 rc = decode_name(&stream, &id);
487 gid = make_kgid(&init_user_ns, id);
489 if (gfp_flags & __GFP_FS)
490 kcred = prepare_kernel_cred(NULL);
492 unsigned int nofs_flags = memalloc_nofs_save();
493 kcred = prepare_kernel_cred(NULL);
494 memalloc_nofs_restore(nofs_flags);
501 cred = RCU_INITIALIZER(kcred);
503 if (lgr->range.iomode == IOMODE_READ)
504 rcu_assign_pointer(fls->mirror_array[i]->ro_cred, cred);
506 rcu_assign_pointer(fls->mirror_array[i]->rw_cred, cred);
508 mirror = ff_layout_add_mirror(lh, fls->mirror_array[i]);
509 if (mirror != fls->mirror_array[i]) {
510 /* swap cred ptrs so free_mirror will clean up old */
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);
515 cred = xchg(&mirror->rw_cred, cred);
516 rcu_assign_pointer(fls->mirror_array[i]->rw_cred, cred);
518 ff_layout_free_mirror(fls->mirror_array[i]);
519 fls->mirror_array[i] = mirror;
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));
528 p = xdr_inline_decode(&stream, 4);
530 goto out_sort_mirrors;
531 fls->flags = be32_to_cpup(p);
533 p = xdr_inline_decode(&stream, 4);
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);
540 ff_layout_sort_mirrors(fls);
541 ret = &fls->generic_hdr;
542 dprintk("<-- %s (success)\n", __func__);
544 __free_page(scratch);
547 _ff_layout_free_lseg(fls);
549 dprintk("<-- %s (%d)\n", __func__, rc);
554 ff_layout_free_lseg(struct pnfs_layout_segment *lseg)
556 struct nfs4_ff_layout_segment *fls = FF_LAYOUT_LSEG(lseg);
558 dprintk("--> %s\n", __func__);
560 if (lseg->pls_range.iomode == IOMODE_RW) {
561 struct nfs4_flexfile_layout *ffl;
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);
570 _ff_layout_free_lseg(fls);
574 nfs4_ff_start_busy_timer(struct nfs4_ff_busy_timer *timer, ktime_t now)
576 /* first IO request? */
577 if (atomic_inc_return(&timer->n_ops) == 1) {
578 timer->start_time = now;
583 nfs4_ff_end_busy_timer(struct nfs4_ff_busy_timer *timer, ktime_t now)
587 if (atomic_dec_return(&timer->n_ops) < 0)
590 start = timer->start_time;
591 timer->start_time = now;
592 return ktime_sub(now, start);
596 nfs4_ff_layoutstat_start_io(struct nfs4_ff_layout_mirror *mirror,
597 struct nfs4_ff_layoutstat *layoutstat,
600 s64 report_interval = FF_LAYOUTSTATS_REPORT_INTERVAL;
601 struct nfs4_flexfile_layout *ffl = FF_LAYOUT_FROM_HDR(mirror->layout);
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)) >=
612 ffl->last_report_time = now;
620 nfs4_ff_layout_stat_io_update_requested(struct nfs4_ff_layoutstat *layoutstat,
623 struct nfs4_ff_io_stat *iostat = &layoutstat->io_stat;
625 iostat->ops_requested++;
626 iostat->bytes_requested += requested;
630 nfs4_ff_layout_stat_io_update_completed(struct nfs4_ff_layoutstat *layoutstat,
633 ktime_t time_completed,
634 ktime_t time_started)
636 struct nfs4_ff_io_stat *iostat = &layoutstat->io_stat;
637 ktime_t completion_time = ktime_sub(time_completed, time_started);
640 iostat->ops_completed++;
641 iostat->bytes_completed += completed;
642 iostat->bytes_not_delivered += requested - completed;
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,
653 nfs4_ff_layout_stat_io_start_read(struct inode *inode,
654 struct nfs4_ff_layout_mirror *mirror,
655 __u64 requested, ktime_t now)
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);
666 pnfs_report_layoutstat(inode, GFP_KERNEL);
670 nfs4_ff_layout_stat_io_end_read(struct rpc_task *task,
671 struct nfs4_ff_layout_mirror *mirror,
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);
684 nfs4_ff_layout_stat_io_start_write(struct inode *inode,
685 struct nfs4_ff_layout_mirror *mirror,
686 __u64 requested, ktime_t now)
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);
697 pnfs_report_layoutstat(inode, GFP_NOIO);
701 nfs4_ff_layout_stat_io_end_write(struct rpc_task *task,
702 struct nfs4_ff_layout_mirror *mirror,
705 enum nfs3_stable_how committed)
707 if (committed == NFS_UNSTABLE)
708 requested = completed = 0;
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);
718 ff_layout_mark_ds_unreachable(struct pnfs_layout_segment *lseg, u32 idx)
720 struct nfs4_deviceid_node *devid = FF_LAYOUT_DEVID_NODE(lseg, idx);
723 nfs4_mark_deviceid_unavailable(devid);
727 ff_layout_mark_ds_reachable(struct pnfs_layout_segment *lseg, u32 idx)
729 struct nfs4_deviceid_node *devid = FF_LAYOUT_DEVID_NODE(lseg, idx);
732 nfs4_mark_deviceid_available(devid);
735 static struct nfs4_pnfs_ds *
736 ff_layout_choose_ds_for_read(struct pnfs_layout_segment *lseg,
737 u32 start_idx, u32 *best_idx,
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;
746 /* mirrors are initially sorted by efficiency */
747 for (idx = start_idx; idx < fls->mirror_array_cnt; idx++) {
748 if (idx+1 == fls->mirror_array_cnt)
749 fail_return = !check_device;
751 mirror = FF_LAYOUT_COMP(lseg, idx);
752 ds = nfs4_ff_layout_prepare_ds(lseg, mirror, fail_return);
757 nfs4_test_deviceid_unavailable(&mirror->mirror_ds->id_node))
767 static struct nfs4_pnfs_ds *
768 ff_layout_choose_any_ds_for_read(struct pnfs_layout_segment *lseg,
769 u32 start_idx, u32 *best_idx)
771 return ff_layout_choose_ds_for_read(lseg, start_idx, best_idx, false);
774 static struct nfs4_pnfs_ds *
775 ff_layout_choose_valid_ds_for_read(struct pnfs_layout_segment *lseg,
776 u32 start_idx, u32 *best_idx)
778 return ff_layout_choose_ds_for_read(lseg, start_idx, best_idx, true);
781 static struct nfs4_pnfs_ds *
782 ff_layout_choose_best_ds_for_read(struct pnfs_layout_segment *lseg,
783 u32 start_idx, u32 *best_idx)
785 struct nfs4_pnfs_ds *ds;
787 ds = ff_layout_choose_valid_ds_for_read(lseg, start_idx, best_idx);
790 return ff_layout_choose_any_ds_for_read(lseg, start_idx, best_idx);
793 static struct nfs4_pnfs_ds *
794 ff_layout_get_ds_for_read(struct nfs_pageio_descriptor *pgio,
797 struct pnfs_layout_segment *lseg = pgio->pg_lseg;
798 struct nfs4_pnfs_ds *ds;
800 ds = ff_layout_choose_best_ds_for_read(lseg, pgio->pg_mirror_idx,
802 if (ds || !pgio->pg_mirror_idx)
804 return ff_layout_choose_best_ds_for_read(lseg, 0, best_idx);
808 ff_layout_pg_get_read(struct nfs_pageio_descriptor *pgio,
809 struct nfs_page *req,
812 pnfs_put_lseg(pgio->pg_lseg);
813 pgio->pg_lseg = pnfs_update_layout(pgio->pg_inode,
814 nfs_req_openctx(req),
820 if (IS_ERR(pgio->pg_lseg)) {
821 pgio->pg_error = PTR_ERR(pgio->pg_lseg);
822 pgio->pg_lseg = NULL;
827 ff_layout_pg_check_layout(struct nfs_pageio_descriptor *pgio,
828 struct nfs_page *req)
830 pnfs_generic_pg_check_layout(pgio);
831 pnfs_generic_pg_check_range(pgio, req);
835 ff_layout_pg_init_read(struct nfs_pageio_descriptor *pgio,
836 struct nfs_page *req)
838 struct nfs_pgio_mirror *pgm;
839 struct nfs4_ff_layout_mirror *mirror;
840 struct nfs4_pnfs_ds *ds;
844 ff_layout_pg_check_layout(pgio, req);
845 /* Use full layout for now */
846 if (!pgio->pg_lseg) {
847 ff_layout_pg_get_read(pgio, req, false);
851 if (ff_layout_avoid_read_on_rw(pgio->pg_lseg)) {
852 ff_layout_pg_get_read(pgio, req, true);
857 ds = ff_layout_get_ds_for_read(pgio, &ds_idx);
859 if (!ff_layout_no_fallback_to_mds(pgio->pg_lseg))
861 pnfs_generic_pg_cleanup(pgio);
862 /* Sleep for 1 second before retrying */
867 mirror = FF_LAYOUT_COMP(pgio->pg_lseg, ds_idx);
868 pgm = &pgio->pg_mirrors[0];
869 pgm->pg_bsize = mirror->mirror_ds->ds_versions[0].rsize;
871 pgio->pg_mirror_idx = ds_idx;
873 if (NFS_SERVER(pgio->pg_inode)->flags &
874 (NFS_MOUNT_SOFT|NFS_MOUNT_SOFTERR))
875 pgio->pg_maxretrans = io_maxretrans;
878 if (pgio->pg_error < 0)
881 trace_pnfs_mds_fallback_pg_init_read(pgio->pg_inode,
882 0, NFS4_MAX_UINT64, IOMODE_READ,
883 NFS_I(pgio->pg_inode)->layout,
885 pgio->pg_maxretrans = 0;
886 nfs_pageio_reset_read_mds(pgio);
890 ff_layout_pg_init_write(struct nfs_pageio_descriptor *pgio,
891 struct nfs_page *req)
893 struct nfs4_ff_layout_mirror *mirror;
894 struct nfs_pgio_mirror *pgm;
895 struct nfs4_pnfs_ds *ds;
899 ff_layout_pg_check_layout(pgio, req);
900 if (!pgio->pg_lseg) {
901 pgio->pg_lseg = pnfs_update_layout(pgio->pg_inode,
902 nfs_req_openctx(req),
908 if (IS_ERR(pgio->pg_lseg)) {
909 pgio->pg_error = PTR_ERR(pgio->pg_lseg);
910 pgio->pg_lseg = NULL;
914 /* If no lseg, fall back to write through mds */
915 if (pgio->pg_lseg == NULL)
918 /* Use a direct mapping of ds_idx to pgio mirror_idx */
919 if (pgio->pg_mirror_count != FF_LAYOUT_MIRROR_COUNT(pgio->pg_lseg))
922 for (i = 0; i < pgio->pg_mirror_count; i++) {
923 mirror = FF_LAYOUT_COMP(pgio->pg_lseg, i);
924 ds = nfs4_ff_layout_prepare_ds(pgio->pg_lseg, mirror, true);
926 if (!ff_layout_no_fallback_to_mds(pgio->pg_lseg))
928 pnfs_generic_pg_cleanup(pgio);
929 /* Sleep for 1 second before retrying */
933 pgm = &pgio->pg_mirrors[i];
934 pgm->pg_bsize = mirror->mirror_ds->ds_versions[0].wsize;
937 if (NFS_SERVER(pgio->pg_inode)->flags &
938 (NFS_MOUNT_SOFT|NFS_MOUNT_SOFTERR))
939 pgio->pg_maxretrans = io_maxretrans;
942 pnfs_generic_pg_cleanup(pgio);
943 pgio->pg_error = -EAGAIN;
946 trace_pnfs_mds_fallback_pg_init_write(pgio->pg_inode,
947 0, NFS4_MAX_UINT64, IOMODE_RW,
948 NFS_I(pgio->pg_inode)->layout,
950 pgio->pg_maxretrans = 0;
951 nfs_pageio_reset_write_mds(pgio);
952 pgio->pg_error = -EAGAIN;
956 ff_layout_pg_get_mirror_count_write(struct nfs_pageio_descriptor *pgio,
957 struct nfs_page *req)
959 if (!pgio->pg_lseg) {
960 pgio->pg_lseg = pnfs_update_layout(pgio->pg_inode,
961 nfs_req_openctx(req),
967 if (IS_ERR(pgio->pg_lseg)) {
968 pgio->pg_error = PTR_ERR(pgio->pg_lseg);
969 pgio->pg_lseg = NULL;
974 return FF_LAYOUT_MIRROR_COUNT(pgio->pg_lseg);
976 trace_pnfs_mds_fallback_pg_get_mirror_count(pgio->pg_inode,
977 0, NFS4_MAX_UINT64, IOMODE_RW,
978 NFS_I(pgio->pg_inode)->layout,
980 /* no lseg means that pnfs is not in use, so no mirroring here */
981 nfs_pageio_reset_write_mds(pgio);
987 ff_layout_pg_set_mirror_write(struct nfs_pageio_descriptor *desc, u32 idx)
989 u32 old = desc->pg_mirror_idx;
991 desc->pg_mirror_idx = idx;
995 static struct nfs_pgio_mirror *
996 ff_layout_pg_get_mirror_write(struct nfs_pageio_descriptor *desc, u32 idx)
998 return &desc->pg_mirrors[idx];
1001 static const struct nfs_pageio_ops ff_layout_pg_read_ops = {
1002 .pg_init = ff_layout_pg_init_read,
1003 .pg_test = pnfs_generic_pg_test,
1004 .pg_doio = pnfs_generic_pg_readpages,
1005 .pg_cleanup = pnfs_generic_pg_cleanup,
1008 static const struct nfs_pageio_ops ff_layout_pg_write_ops = {
1009 .pg_init = ff_layout_pg_init_write,
1010 .pg_test = pnfs_generic_pg_test,
1011 .pg_doio = pnfs_generic_pg_writepages,
1012 .pg_get_mirror_count = ff_layout_pg_get_mirror_count_write,
1013 .pg_cleanup = pnfs_generic_pg_cleanup,
1014 .pg_get_mirror = ff_layout_pg_get_mirror_write,
1015 .pg_set_mirror = ff_layout_pg_set_mirror_write,
1018 static void ff_layout_reset_write(struct nfs_pgio_header *hdr, bool retry_pnfs)
1020 struct rpc_task *task = &hdr->task;
1022 pnfs_layoutcommit_inode(hdr->inode, false);
1025 dprintk("%s Reset task %5u for i/o through pNFS "
1026 "(req %s/%llu, %u bytes @ offset %llu)\n", __func__,
1028 hdr->inode->i_sb->s_id,
1029 (unsigned long long)NFS_FILEID(hdr->inode),
1031 (unsigned long long)hdr->args.offset);
1033 hdr->completion_ops->reschedule_io(hdr);
1037 if (!test_and_set_bit(NFS_IOHDR_REDO, &hdr->flags)) {
1038 dprintk("%s Reset task %5u for i/o through MDS "
1039 "(req %s/%llu, %u bytes @ offset %llu)\n", __func__,
1041 hdr->inode->i_sb->s_id,
1042 (unsigned long long)NFS_FILEID(hdr->inode),
1044 (unsigned long long)hdr->args.offset);
1046 trace_pnfs_mds_fallback_write_done(hdr->inode,
1047 hdr->args.offset, hdr->args.count,
1048 IOMODE_RW, NFS_I(hdr->inode)->layout,
1050 task->tk_status = pnfs_write_done_resend_to_mds(hdr);
1054 static void ff_layout_resend_pnfs_read(struct nfs_pgio_header *hdr)
1056 u32 idx = hdr->pgio_mirror_idx + 1;
1059 if (ff_layout_choose_any_ds_for_read(hdr->lseg, idx, &new_idx))
1060 ff_layout_send_layouterror(hdr->lseg);
1062 pnfs_error_mark_layout_for_return(hdr->inode, hdr->lseg);
1063 pnfs_read_resend_pnfs(hdr, new_idx);
1066 static void ff_layout_reset_read(struct nfs_pgio_header *hdr)
1068 struct rpc_task *task = &hdr->task;
1070 pnfs_layoutcommit_inode(hdr->inode, false);
1071 pnfs_error_mark_layout_for_return(hdr->inode, hdr->lseg);
1073 if (!test_and_set_bit(NFS_IOHDR_REDO, &hdr->flags)) {
1074 dprintk("%s Reset task %5u for i/o through MDS "
1075 "(req %s/%llu, %u bytes @ offset %llu)\n", __func__,
1077 hdr->inode->i_sb->s_id,
1078 (unsigned long long)NFS_FILEID(hdr->inode),
1080 (unsigned long long)hdr->args.offset);
1082 trace_pnfs_mds_fallback_read_done(hdr->inode,
1083 hdr->args.offset, hdr->args.count,
1084 IOMODE_READ, NFS_I(hdr->inode)->layout,
1086 task->tk_status = pnfs_read_done_resend_to_mds(hdr);
1090 static int ff_layout_async_handle_error_v4(struct rpc_task *task,
1091 struct nfs4_state *state,
1092 struct nfs_client *clp,
1093 struct pnfs_layout_segment *lseg,
1096 struct pnfs_layout_hdr *lo = lseg->pls_layout;
1097 struct inode *inode = lo->plh_inode;
1098 struct nfs4_deviceid_node *devid = FF_LAYOUT_DEVID_NODE(lseg, idx);
1099 struct nfs4_slot_table *tbl = &clp->cl_session->fc_slot_table;
1101 switch (task->tk_status) {
1102 case -NFS4ERR_BADSESSION:
1103 case -NFS4ERR_BADSLOT:
1104 case -NFS4ERR_BAD_HIGH_SLOT:
1105 case -NFS4ERR_DEADSESSION:
1106 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
1107 case -NFS4ERR_SEQ_FALSE_RETRY:
1108 case -NFS4ERR_SEQ_MISORDERED:
1109 dprintk("%s ERROR %d, Reset session. Exchangeid "
1110 "flags 0x%x\n", __func__, task->tk_status,
1111 clp->cl_exchange_flags);
1112 nfs4_schedule_session_recovery(clp->cl_session, task->tk_status);
1114 case -NFS4ERR_DELAY:
1115 case -NFS4ERR_GRACE:
1116 rpc_delay(task, FF_LAYOUT_POLL_RETRY_MAX);
1118 case -NFS4ERR_RETRY_UNCACHED_REP:
1120 /* Invalidate Layout errors */
1121 case -NFS4ERR_PNFS_NO_LAYOUT:
1122 case -ESTALE: /* mapped NFS4ERR_STALE */
1123 case -EBADHANDLE: /* mapped NFS4ERR_BADHANDLE */
1124 case -EISDIR: /* mapped NFS4ERR_ISDIR */
1125 case -NFS4ERR_FHEXPIRED:
1126 case -NFS4ERR_WRONG_TYPE:
1127 dprintk("%s Invalid layout error %d\n", __func__,
1130 * Destroy layout so new i/o will get a new layout.
1131 * Layout will not be destroyed until all current lseg
1132 * references are put. Mark layout as invalid to resend failed
1133 * i/o and all i/o waiting on the slot table to the MDS until
1134 * layout is destroyed and a new valid layout is obtained.
1136 pnfs_destroy_layout(NFS_I(inode));
1137 rpc_wake_up(&tbl->slot_tbl_waitq);
1139 /* RPC connection errors */
1147 dprintk("%s DS connection error %d\n", __func__,
1149 nfs4_delete_deviceid(devid->ld, devid->nfs_client,
1151 rpc_wake_up(&tbl->slot_tbl_waitq);
1154 if (ff_layout_avoid_mds_available_ds(lseg))
1155 return -NFS4ERR_RESET_TO_PNFS;
1157 dprintk("%s Retry through MDS. Error %d\n", __func__,
1159 return -NFS4ERR_RESET_TO_MDS;
1161 task->tk_status = 0;
1165 /* Retry all errors through either pNFS or MDS except for -EJUKEBOX */
1166 static int ff_layout_async_handle_error_v3(struct rpc_task *task,
1167 struct pnfs_layout_segment *lseg,
1170 struct nfs4_deviceid_node *devid = FF_LAYOUT_DEVID_NODE(lseg, idx);
1172 switch (task->tk_status) {
1173 /* File access problems. Don't mark the device as unavailable */
1182 nfs_inc_stats(lseg->pls_layout->plh_inode, NFSIOS_DELAY);
1185 dprintk("%s DS connection error %d\n", __func__,
1187 nfs4_delete_deviceid(devid->ld, devid->nfs_client,
1190 /* FIXME: Need to prevent infinite looping here. */
1191 return -NFS4ERR_RESET_TO_PNFS;
1193 task->tk_status = 0;
1194 rpc_restart_call_prepare(task);
1195 rpc_delay(task, NFS_JUKEBOX_RETRY_TIME);
1199 static int ff_layout_async_handle_error(struct rpc_task *task,
1200 struct nfs4_state *state,
1201 struct nfs_client *clp,
1202 struct pnfs_layout_segment *lseg,
1205 int vers = clp->cl_nfs_mod->rpc_vers->number;
1207 if (task->tk_status >= 0) {
1208 ff_layout_mark_ds_reachable(lseg, idx);
1212 /* Handle the case of an invalid layout segment */
1213 if (!pnfs_is_valid_lseg(lseg))
1214 return -NFS4ERR_RESET_TO_PNFS;
1218 return ff_layout_async_handle_error_v3(task, lseg, idx);
1220 return ff_layout_async_handle_error_v4(task, state, clp,
1223 /* should never happen */
1229 static void ff_layout_io_track_ds_error(struct pnfs_layout_segment *lseg,
1230 u32 idx, u64 offset, u64 length,
1231 u32 *op_status, int opnum, int error)
1233 struct nfs4_ff_layout_mirror *mirror;
1234 u32 status = *op_status;
1241 case -EPROTONOSUPPORT:
1253 *op_status = status = NFS4ERR_NXIO;
1256 *op_status = status = NFS4ERR_ACCESS;
1263 mirror = FF_LAYOUT_COMP(lseg, idx);
1264 err = ff_layout_track_ds_error(FF_LAYOUT_FROM_HDR(lseg->pls_layout),
1265 mirror, offset, length, status, opnum,
1273 ff_layout_mark_ds_unreachable(lseg, idx);
1275 * Don't return the layout if this is a read and we still
1276 * have layouts to try
1278 if (opnum == OP_READ)
1282 pnfs_error_mark_layout_for_return(lseg->pls_layout->plh_inode,
1286 dprintk("%s: err %d op %d status %u\n", __func__, err, opnum, status);
1289 /* NFS_PROTO call done callback routines */
1290 static int ff_layout_read_done_cb(struct rpc_task *task,
1291 struct nfs_pgio_header *hdr)
1295 if (task->tk_status < 0) {
1296 ff_layout_io_track_ds_error(hdr->lseg, hdr->pgio_mirror_idx,
1297 hdr->args.offset, hdr->args.count,
1298 &hdr->res.op_status, OP_READ,
1300 trace_ff_layout_read_error(hdr);
1303 err = ff_layout_async_handle_error(task, hdr->args.context->state,
1304 hdr->ds_clp, hdr->lseg,
1305 hdr->pgio_mirror_idx);
1307 trace_nfs4_pnfs_read(hdr, err);
1308 clear_bit(NFS_IOHDR_RESEND_PNFS, &hdr->flags);
1309 clear_bit(NFS_IOHDR_RESEND_MDS, &hdr->flags);
1311 case -NFS4ERR_RESET_TO_PNFS:
1312 set_bit(NFS_IOHDR_RESEND_PNFS, &hdr->flags);
1313 return task->tk_status;
1314 case -NFS4ERR_RESET_TO_MDS:
1315 set_bit(NFS_IOHDR_RESEND_MDS, &hdr->flags);
1316 return task->tk_status;
1323 rpc_restart_call_prepare(task);
1328 ff_layout_need_layoutcommit(struct pnfs_layout_segment *lseg)
1330 return !(FF_LAYOUT_LSEG(lseg)->flags & FF_FLAGS_NO_LAYOUTCOMMIT);
1334 * We reference the rpc_cred of the first WRITE that triggers the need for
1335 * a LAYOUTCOMMIT, and use it to send the layoutcommit compound.
1336 * rfc5661 is not clear about which credential should be used.
1338 * Flexlayout client should treat DS replied FILE_SYNC as DATA_SYNC, so
1339 * to follow http://www.rfc-editor.org/errata_search.php?rfc=5661&eid=2751
1340 * we always send layoutcommit after DS writes.
1343 ff_layout_set_layoutcommit(struct inode *inode,
1344 struct pnfs_layout_segment *lseg,
1347 if (!ff_layout_need_layoutcommit(lseg))
1350 pnfs_set_layoutcommit(inode, lseg, end_offset);
1351 dprintk("%s inode %lu pls_end_pos %llu\n", __func__, inode->i_ino,
1352 (unsigned long long) NFS_I(inode)->layout->plh_lwb);
1355 static void ff_layout_read_record_layoutstats_start(struct rpc_task *task,
1356 struct nfs_pgio_header *hdr)
1358 if (test_and_set_bit(NFS_IOHDR_STAT, &hdr->flags))
1360 nfs4_ff_layout_stat_io_start_read(hdr->inode,
1361 FF_LAYOUT_COMP(hdr->lseg, hdr->pgio_mirror_idx),
1366 static void ff_layout_read_record_layoutstats_done(struct rpc_task *task,
1367 struct nfs_pgio_header *hdr)
1369 if (!test_and_clear_bit(NFS_IOHDR_STAT, &hdr->flags))
1371 nfs4_ff_layout_stat_io_end_read(task,
1372 FF_LAYOUT_COMP(hdr->lseg, hdr->pgio_mirror_idx),
1375 set_bit(NFS_LSEG_LAYOUTRETURN, &hdr->lseg->pls_flags);
1378 static int ff_layout_read_prepare_common(struct rpc_task *task,
1379 struct nfs_pgio_header *hdr)
1381 if (unlikely(test_bit(NFS_CONTEXT_BAD, &hdr->args.context->flags))) {
1382 rpc_exit(task, -EIO);
1386 ff_layout_read_record_layoutstats_start(task, hdr);
1391 * Call ops for the async read/write cases
1392 * In the case of dense layouts, the offset needs to be reset to its
1395 static void ff_layout_read_prepare_v3(struct rpc_task *task, void *data)
1397 struct nfs_pgio_header *hdr = data;
1399 if (ff_layout_read_prepare_common(task, hdr))
1402 rpc_call_start(task);
1405 static void ff_layout_read_prepare_v4(struct rpc_task *task, void *data)
1407 struct nfs_pgio_header *hdr = data;
1409 if (nfs4_setup_sequence(hdr->ds_clp,
1410 &hdr->args.seq_args,
1415 ff_layout_read_prepare_common(task, hdr);
1418 static void ff_layout_read_call_done(struct rpc_task *task, void *data)
1420 struct nfs_pgio_header *hdr = data;
1422 dprintk("--> %s task->tk_status %d\n", __func__, task->tk_status);
1424 if (test_bit(NFS_IOHDR_REDO, &hdr->flags) &&
1425 task->tk_status == 0) {
1426 nfs4_sequence_done(task, &hdr->res.seq_res);
1430 /* Note this may cause RPC to be resent */
1431 hdr->mds_ops->rpc_call_done(task, hdr);
1434 static void ff_layout_read_count_stats(struct rpc_task *task, void *data)
1436 struct nfs_pgio_header *hdr = data;
1438 ff_layout_read_record_layoutstats_done(task, hdr);
1439 rpc_count_iostats_metrics(task,
1440 &NFS_CLIENT(hdr->inode)->cl_metrics[NFSPROC4_CLNT_READ]);
1443 static void ff_layout_read_release(void *data)
1445 struct nfs_pgio_header *hdr = data;
1447 ff_layout_read_record_layoutstats_done(&hdr->task, hdr);
1448 if (test_bit(NFS_IOHDR_RESEND_PNFS, &hdr->flags))
1449 ff_layout_resend_pnfs_read(hdr);
1450 else if (test_bit(NFS_IOHDR_RESEND_MDS, &hdr->flags))
1451 ff_layout_reset_read(hdr);
1452 pnfs_generic_rw_release(data);
1456 static int ff_layout_write_done_cb(struct rpc_task *task,
1457 struct nfs_pgio_header *hdr)
1459 loff_t end_offs = 0;
1462 if (task->tk_status < 0) {
1463 ff_layout_io_track_ds_error(hdr->lseg, hdr->pgio_mirror_idx,
1464 hdr->args.offset, hdr->args.count,
1465 &hdr->res.op_status, OP_WRITE,
1467 trace_ff_layout_write_error(hdr);
1470 err = ff_layout_async_handle_error(task, hdr->args.context->state,
1471 hdr->ds_clp, hdr->lseg,
1472 hdr->pgio_mirror_idx);
1474 trace_nfs4_pnfs_write(hdr, err);
1475 clear_bit(NFS_IOHDR_RESEND_PNFS, &hdr->flags);
1476 clear_bit(NFS_IOHDR_RESEND_MDS, &hdr->flags);
1478 case -NFS4ERR_RESET_TO_PNFS:
1479 set_bit(NFS_IOHDR_RESEND_PNFS, &hdr->flags);
1480 return task->tk_status;
1481 case -NFS4ERR_RESET_TO_MDS:
1482 set_bit(NFS_IOHDR_RESEND_MDS, &hdr->flags);
1483 return task->tk_status;
1488 if (hdr->res.verf->committed == NFS_FILE_SYNC ||
1489 hdr->res.verf->committed == NFS_DATA_SYNC)
1490 end_offs = hdr->mds_offset + (loff_t)hdr->res.count;
1492 /* Note: if the write is unstable, don't set end_offs until commit */
1493 ff_layout_set_layoutcommit(hdr->inode, hdr->lseg, end_offs);
1495 /* zero out fattr since we don't care DS attr at all */
1496 hdr->fattr.valid = 0;
1497 if (task->tk_status >= 0)
1498 nfs_writeback_update_inode(hdr);
1503 static int ff_layout_commit_done_cb(struct rpc_task *task,
1504 struct nfs_commit_data *data)
1508 if (task->tk_status < 0) {
1509 ff_layout_io_track_ds_error(data->lseg, data->ds_commit_index,
1510 data->args.offset, data->args.count,
1511 &data->res.op_status, OP_COMMIT,
1513 trace_ff_layout_commit_error(data);
1516 err = ff_layout_async_handle_error(task, NULL, data->ds_clp,
1517 data->lseg, data->ds_commit_index);
1519 trace_nfs4_pnfs_commit_ds(data, err);
1521 case -NFS4ERR_RESET_TO_PNFS:
1522 pnfs_generic_prepare_to_resend_writes(data);
1524 case -NFS4ERR_RESET_TO_MDS:
1525 pnfs_generic_prepare_to_resend_writes(data);
1528 rpc_restart_call_prepare(task);
1532 ff_layout_set_layoutcommit(data->inode, data->lseg, data->lwb);
1537 static void ff_layout_write_record_layoutstats_start(struct rpc_task *task,
1538 struct nfs_pgio_header *hdr)
1540 if (test_and_set_bit(NFS_IOHDR_STAT, &hdr->flags))
1542 nfs4_ff_layout_stat_io_start_write(hdr->inode,
1543 FF_LAYOUT_COMP(hdr->lseg, hdr->pgio_mirror_idx),
1548 static void ff_layout_write_record_layoutstats_done(struct rpc_task *task,
1549 struct nfs_pgio_header *hdr)
1551 if (!test_and_clear_bit(NFS_IOHDR_STAT, &hdr->flags))
1553 nfs4_ff_layout_stat_io_end_write(task,
1554 FF_LAYOUT_COMP(hdr->lseg, hdr->pgio_mirror_idx),
1555 hdr->args.count, hdr->res.count,
1556 hdr->res.verf->committed);
1557 set_bit(NFS_LSEG_LAYOUTRETURN, &hdr->lseg->pls_flags);
1560 static int ff_layout_write_prepare_common(struct rpc_task *task,
1561 struct nfs_pgio_header *hdr)
1563 if (unlikely(test_bit(NFS_CONTEXT_BAD, &hdr->args.context->flags))) {
1564 rpc_exit(task, -EIO);
1568 ff_layout_write_record_layoutstats_start(task, hdr);
1572 static void ff_layout_write_prepare_v3(struct rpc_task *task, void *data)
1574 struct nfs_pgio_header *hdr = data;
1576 if (ff_layout_write_prepare_common(task, hdr))
1579 rpc_call_start(task);
1582 static void ff_layout_write_prepare_v4(struct rpc_task *task, void *data)
1584 struct nfs_pgio_header *hdr = data;
1586 if (nfs4_setup_sequence(hdr->ds_clp,
1587 &hdr->args.seq_args,
1592 ff_layout_write_prepare_common(task, hdr);
1595 static void ff_layout_write_call_done(struct rpc_task *task, void *data)
1597 struct nfs_pgio_header *hdr = data;
1599 if (test_bit(NFS_IOHDR_REDO, &hdr->flags) &&
1600 task->tk_status == 0) {
1601 nfs4_sequence_done(task, &hdr->res.seq_res);
1605 /* Note this may cause RPC to be resent */
1606 hdr->mds_ops->rpc_call_done(task, hdr);
1609 static void ff_layout_write_count_stats(struct rpc_task *task, void *data)
1611 struct nfs_pgio_header *hdr = data;
1613 ff_layout_write_record_layoutstats_done(task, hdr);
1614 rpc_count_iostats_metrics(task,
1615 &NFS_CLIENT(hdr->inode)->cl_metrics[NFSPROC4_CLNT_WRITE]);
1618 static void ff_layout_write_release(void *data)
1620 struct nfs_pgio_header *hdr = data;
1622 ff_layout_write_record_layoutstats_done(&hdr->task, hdr);
1623 if (test_bit(NFS_IOHDR_RESEND_PNFS, &hdr->flags)) {
1624 ff_layout_send_layouterror(hdr->lseg);
1625 ff_layout_reset_write(hdr, true);
1626 } else if (test_bit(NFS_IOHDR_RESEND_MDS, &hdr->flags))
1627 ff_layout_reset_write(hdr, false);
1628 pnfs_generic_rw_release(data);
1631 static void ff_layout_commit_record_layoutstats_start(struct rpc_task *task,
1632 struct nfs_commit_data *cdata)
1634 if (test_and_set_bit(NFS_IOHDR_STAT, &cdata->flags))
1636 nfs4_ff_layout_stat_io_start_write(cdata->inode,
1637 FF_LAYOUT_COMP(cdata->lseg, cdata->ds_commit_index),
1641 static void ff_layout_commit_record_layoutstats_done(struct rpc_task *task,
1642 struct nfs_commit_data *cdata)
1644 struct nfs_page *req;
1647 if (!test_and_clear_bit(NFS_IOHDR_STAT, &cdata->flags))
1650 if (task->tk_status == 0) {
1651 list_for_each_entry(req, &cdata->pages, wb_list)
1652 count += req->wb_bytes;
1654 nfs4_ff_layout_stat_io_end_write(task,
1655 FF_LAYOUT_COMP(cdata->lseg, cdata->ds_commit_index),
1656 count, count, NFS_FILE_SYNC);
1657 set_bit(NFS_LSEG_LAYOUTRETURN, &cdata->lseg->pls_flags);
1660 static void ff_layout_commit_prepare_common(struct rpc_task *task,
1661 struct nfs_commit_data *cdata)
1663 ff_layout_commit_record_layoutstats_start(task, cdata);
1666 static void ff_layout_commit_prepare_v3(struct rpc_task *task, void *data)
1668 ff_layout_commit_prepare_common(task, data);
1669 rpc_call_start(task);
1672 static void ff_layout_commit_prepare_v4(struct rpc_task *task, void *data)
1674 struct nfs_commit_data *wdata = data;
1676 if (nfs4_setup_sequence(wdata->ds_clp,
1677 &wdata->args.seq_args,
1678 &wdata->res.seq_res,
1681 ff_layout_commit_prepare_common(task, data);
1684 static void ff_layout_commit_done(struct rpc_task *task, void *data)
1686 pnfs_generic_write_commit_done(task, data);
1689 static void ff_layout_commit_count_stats(struct rpc_task *task, void *data)
1691 struct nfs_commit_data *cdata = data;
1693 ff_layout_commit_record_layoutstats_done(task, cdata);
1694 rpc_count_iostats_metrics(task,
1695 &NFS_CLIENT(cdata->inode)->cl_metrics[NFSPROC4_CLNT_COMMIT]);
1698 static void ff_layout_commit_release(void *data)
1700 struct nfs_commit_data *cdata = data;
1702 ff_layout_commit_record_layoutstats_done(&cdata->task, cdata);
1703 pnfs_generic_commit_release(data);
1706 static const struct rpc_call_ops ff_layout_read_call_ops_v3 = {
1707 .rpc_call_prepare = ff_layout_read_prepare_v3,
1708 .rpc_call_done = ff_layout_read_call_done,
1709 .rpc_count_stats = ff_layout_read_count_stats,
1710 .rpc_release = ff_layout_read_release,
1713 static const struct rpc_call_ops ff_layout_read_call_ops_v4 = {
1714 .rpc_call_prepare = ff_layout_read_prepare_v4,
1715 .rpc_call_done = ff_layout_read_call_done,
1716 .rpc_count_stats = ff_layout_read_count_stats,
1717 .rpc_release = ff_layout_read_release,
1720 static const struct rpc_call_ops ff_layout_write_call_ops_v3 = {
1721 .rpc_call_prepare = ff_layout_write_prepare_v3,
1722 .rpc_call_done = ff_layout_write_call_done,
1723 .rpc_count_stats = ff_layout_write_count_stats,
1724 .rpc_release = ff_layout_write_release,
1727 static const struct rpc_call_ops ff_layout_write_call_ops_v4 = {
1728 .rpc_call_prepare = ff_layout_write_prepare_v4,
1729 .rpc_call_done = ff_layout_write_call_done,
1730 .rpc_count_stats = ff_layout_write_count_stats,
1731 .rpc_release = ff_layout_write_release,
1734 static const struct rpc_call_ops ff_layout_commit_call_ops_v3 = {
1735 .rpc_call_prepare = ff_layout_commit_prepare_v3,
1736 .rpc_call_done = ff_layout_commit_done,
1737 .rpc_count_stats = ff_layout_commit_count_stats,
1738 .rpc_release = ff_layout_commit_release,
1741 static const struct rpc_call_ops ff_layout_commit_call_ops_v4 = {
1742 .rpc_call_prepare = ff_layout_commit_prepare_v4,
1743 .rpc_call_done = ff_layout_commit_done,
1744 .rpc_count_stats = ff_layout_commit_count_stats,
1745 .rpc_release = ff_layout_commit_release,
1748 static enum pnfs_try_status
1749 ff_layout_read_pagelist(struct nfs_pgio_header *hdr)
1751 struct pnfs_layout_segment *lseg = hdr->lseg;
1752 struct nfs4_pnfs_ds *ds;
1753 struct rpc_clnt *ds_clnt;
1754 struct nfs4_ff_layout_mirror *mirror;
1755 const struct cred *ds_cred;
1756 loff_t offset = hdr->args.offset;
1757 u32 idx = hdr->pgio_mirror_idx;
1761 dprintk("--> %s ino %lu pgbase %u req %zu@%llu\n",
1762 __func__, hdr->inode->i_ino,
1763 hdr->args.pgbase, (size_t)hdr->args.count, offset);
1765 mirror = FF_LAYOUT_COMP(lseg, idx);
1766 ds = nfs4_ff_layout_prepare_ds(lseg, mirror, false);
1770 ds_clnt = nfs4_ff_find_or_create_ds_client(mirror, ds->ds_clp,
1772 if (IS_ERR(ds_clnt))
1775 ds_cred = ff_layout_get_ds_cred(mirror, &lseg->pls_range, hdr->cred);
1779 vers = nfs4_ff_layout_ds_version(mirror);
1781 dprintk("%s USE DS: %s cl_count %d vers %d\n", __func__,
1782 ds->ds_remotestr, refcount_read(&ds->ds_clp->cl_count), vers);
1784 hdr->pgio_done_cb = ff_layout_read_done_cb;
1785 refcount_inc(&ds->ds_clp->cl_count);
1786 hdr->ds_clp = ds->ds_clp;
1787 fh = nfs4_ff_layout_select_ds_fh(mirror);
1791 nfs4_ff_layout_select_ds_stateid(mirror, &hdr->args.stateid);
1794 * Note that if we ever decide to split across DSes,
1795 * then we may need to handle dense-like offsets.
1797 hdr->args.offset = offset;
1798 hdr->mds_offset = offset;
1800 /* Perform an asynchronous read to ds */
1801 nfs_initiate_pgio(ds_clnt, hdr, ds_cred, ds->ds_clp->rpc_ops,
1802 vers == 3 ? &ff_layout_read_call_ops_v3 :
1803 &ff_layout_read_call_ops_v4,
1804 0, RPC_TASK_SOFTCONN);
1806 return PNFS_ATTEMPTED;
1809 if (ff_layout_avoid_mds_available_ds(lseg))
1810 return PNFS_TRY_AGAIN;
1811 trace_pnfs_mds_fallback_read_pagelist(hdr->inode,
1812 hdr->args.offset, hdr->args.count,
1813 IOMODE_READ, NFS_I(hdr->inode)->layout, lseg);
1814 return PNFS_NOT_ATTEMPTED;
1817 /* Perform async writes. */
1818 static enum pnfs_try_status
1819 ff_layout_write_pagelist(struct nfs_pgio_header *hdr, int sync)
1821 struct pnfs_layout_segment *lseg = hdr->lseg;
1822 struct nfs4_pnfs_ds *ds;
1823 struct rpc_clnt *ds_clnt;
1824 struct nfs4_ff_layout_mirror *mirror;
1825 const struct cred *ds_cred;
1826 loff_t offset = hdr->args.offset;
1829 u32 idx = hdr->pgio_mirror_idx;
1831 mirror = FF_LAYOUT_COMP(lseg, idx);
1832 ds = nfs4_ff_layout_prepare_ds(lseg, mirror, true);
1836 ds_clnt = nfs4_ff_find_or_create_ds_client(mirror, ds->ds_clp,
1838 if (IS_ERR(ds_clnt))
1841 ds_cred = ff_layout_get_ds_cred(mirror, &lseg->pls_range, hdr->cred);
1845 vers = nfs4_ff_layout_ds_version(mirror);
1847 dprintk("%s ino %lu sync %d req %zu@%llu DS: %s cl_count %d vers %d\n",
1848 __func__, hdr->inode->i_ino, sync, (size_t) hdr->args.count,
1849 offset, ds->ds_remotestr, refcount_read(&ds->ds_clp->cl_count),
1852 hdr->pgio_done_cb = ff_layout_write_done_cb;
1853 refcount_inc(&ds->ds_clp->cl_count);
1854 hdr->ds_clp = ds->ds_clp;
1855 hdr->ds_commit_idx = idx;
1856 fh = nfs4_ff_layout_select_ds_fh(mirror);
1860 nfs4_ff_layout_select_ds_stateid(mirror, &hdr->args.stateid);
1863 * Note that if we ever decide to split across DSes,
1864 * then we may need to handle dense-like offsets.
1866 hdr->args.offset = offset;
1868 /* Perform an asynchronous write */
1869 nfs_initiate_pgio(ds_clnt, hdr, ds_cred, ds->ds_clp->rpc_ops,
1870 vers == 3 ? &ff_layout_write_call_ops_v3 :
1871 &ff_layout_write_call_ops_v4,
1872 sync, RPC_TASK_SOFTCONN);
1874 return PNFS_ATTEMPTED;
1877 if (ff_layout_avoid_mds_available_ds(lseg))
1878 return PNFS_TRY_AGAIN;
1879 trace_pnfs_mds_fallback_write_pagelist(hdr->inode,
1880 hdr->args.offset, hdr->args.count,
1881 IOMODE_RW, NFS_I(hdr->inode)->layout, lseg);
1882 return PNFS_NOT_ATTEMPTED;
1885 static u32 calc_ds_index_from_commit(struct pnfs_layout_segment *lseg, u32 i)
1890 static struct nfs_fh *
1891 select_ds_fh_from_commit(struct pnfs_layout_segment *lseg, u32 i)
1893 struct nfs4_ff_layout_segment *flseg = FF_LAYOUT_LSEG(lseg);
1895 /* FIXME: Assume that there is only one NFS version available
1898 return &flseg->mirror_array[i]->fh_versions[0];
1901 static int ff_layout_initiate_commit(struct nfs_commit_data *data, int how)
1903 struct pnfs_layout_segment *lseg = data->lseg;
1904 struct nfs4_pnfs_ds *ds;
1905 struct rpc_clnt *ds_clnt;
1906 struct nfs4_ff_layout_mirror *mirror;
1907 const struct cred *ds_cred;
1912 if (!lseg || !(pnfs_is_valid_lseg(lseg) ||
1913 test_bit(NFS_LSEG_LAYOUTRETURN, &lseg->pls_flags)))
1916 idx = calc_ds_index_from_commit(lseg, data->ds_commit_index);
1917 mirror = FF_LAYOUT_COMP(lseg, idx);
1918 ds = nfs4_ff_layout_prepare_ds(lseg, mirror, true);
1922 ds_clnt = nfs4_ff_find_or_create_ds_client(mirror, ds->ds_clp,
1924 if (IS_ERR(ds_clnt))
1927 ds_cred = ff_layout_get_ds_cred(mirror, &lseg->pls_range, data->cred);
1931 vers = nfs4_ff_layout_ds_version(mirror);
1933 dprintk("%s ino %lu, how %d cl_count %d vers %d\n", __func__,
1934 data->inode->i_ino, how, refcount_read(&ds->ds_clp->cl_count),
1936 data->commit_done_cb = ff_layout_commit_done_cb;
1937 data->cred = ds_cred;
1938 refcount_inc(&ds->ds_clp->cl_count);
1939 data->ds_clp = ds->ds_clp;
1940 fh = select_ds_fh_from_commit(lseg, data->ds_commit_index);
1944 ret = nfs_initiate_commit(ds_clnt, data, ds->ds_clp->rpc_ops,
1945 vers == 3 ? &ff_layout_commit_call_ops_v3 :
1946 &ff_layout_commit_call_ops_v4,
1947 how, RPC_TASK_SOFTCONN);
1951 pnfs_generic_prepare_to_resend_writes(data);
1952 pnfs_generic_commit_release(data);
1957 ff_layout_commit_pagelist(struct inode *inode, struct list_head *mds_pages,
1958 int how, struct nfs_commit_info *cinfo)
1960 return pnfs_generic_commit_pagelist(inode, mds_pages, how, cinfo,
1961 ff_layout_initiate_commit);
1964 static struct pnfs_ds_commit_info *
1965 ff_layout_get_ds_info(struct inode *inode)
1967 struct pnfs_layout_hdr *layout = NFS_I(inode)->layout;
1972 return &FF_LAYOUT_FROM_HDR(layout)->commit_info;
1976 ff_layout_setup_ds_info(struct pnfs_ds_commit_info *fl_cinfo,
1977 struct pnfs_layout_segment *lseg)
1979 struct nfs4_ff_layout_segment *flseg = FF_LAYOUT_LSEG(lseg);
1980 struct inode *inode = lseg->pls_layout->plh_inode;
1981 struct pnfs_commit_array *array, *new;
1983 new = pnfs_alloc_commit_array(flseg->mirror_array_cnt, GFP_NOIO);
1985 spin_lock(&inode->i_lock);
1986 array = pnfs_add_commit_array(fl_cinfo, new, lseg);
1987 spin_unlock(&inode->i_lock);
1989 pnfs_free_commit_array(new);
1994 ff_layout_release_ds_info(struct pnfs_ds_commit_info *fl_cinfo,
1995 struct inode *inode)
1997 spin_lock(&inode->i_lock);
1998 pnfs_generic_ds_cinfo_destroy(fl_cinfo);
1999 spin_unlock(&inode->i_lock);
2003 ff_layout_free_deviceid_node(struct nfs4_deviceid_node *d)
2005 nfs4_ff_layout_free_deviceid(container_of(d, struct nfs4_ff_layout_ds,
2009 static int ff_layout_encode_ioerr(struct xdr_stream *xdr,
2010 const struct nfs4_layoutreturn_args *args,
2011 const struct nfs4_flexfile_layoutreturn_args *ff_args)
2015 start = xdr_reserve_space(xdr, 4);
2016 if (unlikely(!start))
2019 *start = cpu_to_be32(ff_args->num_errors);
2020 /* This assume we always return _ALL_ layouts */
2021 return ff_layout_encode_ds_ioerr(xdr, &ff_args->errors);
2025 encode_opaque_fixed(struct xdr_stream *xdr, const void *buf, size_t len)
2027 WARN_ON_ONCE(xdr_stream_encode_opaque_fixed(xdr, buf, len) < 0);
2031 ff_layout_encode_ff_iostat_head(struct xdr_stream *xdr,
2032 const nfs4_stateid *stateid,
2033 const struct nfs42_layoutstat_devinfo *devinfo)
2037 p = xdr_reserve_space(xdr, 8 + 8);
2038 p = xdr_encode_hyper(p, devinfo->offset);
2039 p = xdr_encode_hyper(p, devinfo->length);
2040 encode_opaque_fixed(xdr, stateid->data, NFS4_STATEID_SIZE);
2041 p = xdr_reserve_space(xdr, 4*8);
2042 p = xdr_encode_hyper(p, devinfo->read_count);
2043 p = xdr_encode_hyper(p, devinfo->read_bytes);
2044 p = xdr_encode_hyper(p, devinfo->write_count);
2045 p = xdr_encode_hyper(p, devinfo->write_bytes);
2046 encode_opaque_fixed(xdr, devinfo->dev_id.data, NFS4_DEVICEID4_SIZE);
2050 ff_layout_encode_ff_iostat(struct xdr_stream *xdr,
2051 const nfs4_stateid *stateid,
2052 const struct nfs42_layoutstat_devinfo *devinfo)
2054 ff_layout_encode_ff_iostat_head(xdr, stateid, devinfo);
2055 ff_layout_encode_ff_layoutupdate(xdr, devinfo,
2056 devinfo->ld_private.data);
2059 /* report nothing for now */
2060 static void ff_layout_encode_iostats_array(struct xdr_stream *xdr,
2061 const struct nfs4_layoutreturn_args *args,
2062 struct nfs4_flexfile_layoutreturn_args *ff_args)
2067 p = xdr_reserve_space(xdr, 4);
2068 *p = cpu_to_be32(ff_args->num_dev);
2069 for (i = 0; i < ff_args->num_dev; i++)
2070 ff_layout_encode_ff_iostat(xdr,
2071 &args->layout->plh_stateid,
2072 &ff_args->devinfo[i]);
2076 ff_layout_free_iostats_array(struct nfs42_layoutstat_devinfo *devinfo,
2077 unsigned int num_entries)
2081 for (i = 0; i < num_entries; i++) {
2082 if (!devinfo[i].ld_private.ops)
2084 if (!devinfo[i].ld_private.ops->free)
2086 devinfo[i].ld_private.ops->free(&devinfo[i].ld_private);
2090 static struct nfs4_deviceid_node *
2091 ff_layout_alloc_deviceid_node(struct nfs_server *server,
2092 struct pnfs_device *pdev, gfp_t gfp_flags)
2094 struct nfs4_ff_layout_ds *dsaddr;
2096 dsaddr = nfs4_ff_alloc_deviceid_node(server, pdev, gfp_flags);
2099 return &dsaddr->id_node;
2103 ff_layout_encode_layoutreturn(struct xdr_stream *xdr,
2104 const void *voidargs,
2105 const struct nfs4_xdr_opaque_data *ff_opaque)
2107 const struct nfs4_layoutreturn_args *args = voidargs;
2108 struct nfs4_flexfile_layoutreturn_args *ff_args = ff_opaque->data;
2109 struct xdr_buf tmp_buf = {
2112 .iov_base = page_address(ff_args->pages[0]),
2115 .buflen = PAGE_SIZE,
2117 struct xdr_stream tmp_xdr;
2120 dprintk("%s: Begin\n", __func__);
2122 xdr_init_encode(&tmp_xdr, &tmp_buf, NULL, NULL);
2124 ff_layout_encode_ioerr(&tmp_xdr, args, ff_args);
2125 ff_layout_encode_iostats_array(&tmp_xdr, args, ff_args);
2127 start = xdr_reserve_space(xdr, 4);
2128 *start = cpu_to_be32(tmp_buf.len);
2129 xdr_write_pages(xdr, ff_args->pages, 0, tmp_buf.len);
2131 dprintk("%s: Return\n", __func__);
2135 ff_layout_free_layoutreturn(struct nfs4_xdr_opaque_data *args)
2137 struct nfs4_flexfile_layoutreturn_args *ff_args;
2141 ff_args = args->data;
2144 ff_layout_free_ds_ioerr(&ff_args->errors);
2145 ff_layout_free_iostats_array(ff_args->devinfo, ff_args->num_dev);
2147 put_page(ff_args->pages[0]);
2151 static const struct nfs4_xdr_opaque_ops layoutreturn_ops = {
2152 .encode = ff_layout_encode_layoutreturn,
2153 .free = ff_layout_free_layoutreturn,
2157 ff_layout_prepare_layoutreturn(struct nfs4_layoutreturn_args *args)
2159 struct nfs4_flexfile_layoutreturn_args *ff_args;
2160 struct nfs4_flexfile_layout *ff_layout = FF_LAYOUT_FROM_HDR(args->layout);
2162 ff_args = kmalloc(sizeof(*ff_args), GFP_KERNEL);
2165 ff_args->pages[0] = alloc_page(GFP_KERNEL);
2166 if (!ff_args->pages[0])
2167 goto out_nomem_free;
2169 INIT_LIST_HEAD(&ff_args->errors);
2170 ff_args->num_errors = ff_layout_fetch_ds_ioerr(args->layout,
2171 &args->range, &ff_args->errors,
2172 FF_LAYOUTRETURN_MAXERR);
2174 spin_lock(&args->inode->i_lock);
2175 ff_args->num_dev = ff_layout_mirror_prepare_stats(&ff_layout->generic_hdr,
2176 &ff_args->devinfo[0], ARRAY_SIZE(ff_args->devinfo));
2177 spin_unlock(&args->inode->i_lock);
2179 args->ld_private->ops = &layoutreturn_ops;
2180 args->ld_private->data = ff_args;
2188 #ifdef CONFIG_NFS_V4_2
2190 ff_layout_send_layouterror(struct pnfs_layout_segment *lseg)
2192 struct pnfs_layout_hdr *lo = lseg->pls_layout;
2193 struct nfs42_layout_error *errors;
2196 if (!nfs_server_capable(lo->plh_inode, NFS_CAP_LAYOUTERROR))
2198 ff_layout_fetch_ds_ioerr(lo, &lseg->pls_range, &head, -1);
2199 if (list_empty(&head))
2202 errors = kmalloc_array(NFS42_LAYOUTERROR_MAX,
2203 sizeof(*errors), GFP_NOFS);
2204 if (errors != NULL) {
2205 const struct nfs4_ff_layout_ds_err *pos;
2208 list_for_each_entry(pos, &head, list) {
2209 errors[n].offset = pos->offset;
2210 errors[n].length = pos->length;
2211 nfs4_stateid_copy(&errors[n].stateid, &pos->stateid);
2212 errors[n].errors[0].dev_id = pos->deviceid;
2213 errors[n].errors[0].status = pos->status;
2214 errors[n].errors[0].opnum = pos->opnum;
2216 if (!list_is_last(&pos->list, &head) &&
2217 n < NFS42_LAYOUTERROR_MAX)
2219 if (nfs42_proc_layouterror(lseg, errors, n) < 0)
2225 ff_layout_free_ds_ioerr(&head);
2229 ff_layout_send_layouterror(struct pnfs_layout_segment *lseg)
2235 ff_layout_ntop4(const struct sockaddr *sap, char *buf, const size_t buflen)
2237 const struct sockaddr_in *sin = (struct sockaddr_in *)sap;
2239 return snprintf(buf, buflen, "%pI4", &sin->sin_addr);
2243 ff_layout_ntop6_noscopeid(const struct sockaddr *sap, char *buf,
2246 const struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)sap;
2247 const struct in6_addr *addr = &sin6->sin6_addr;
2250 * RFC 4291, Section 2.2.2
2252 * Shorthanded ANY address
2254 if (ipv6_addr_any(addr))
2255 return snprintf(buf, buflen, "::");
2258 * RFC 4291, Section 2.2.2
2260 * Shorthanded loopback address
2262 if (ipv6_addr_loopback(addr))
2263 return snprintf(buf, buflen, "::1");
2266 * RFC 4291, Section 2.2.3
2268 * Special presentation address format for mapped v4
2271 if (ipv6_addr_v4mapped(addr))
2272 return snprintf(buf, buflen, "::ffff:%pI4",
2273 &addr->s6_addr32[3]);
2276 * RFC 4291, Section 2.2.1
2278 return snprintf(buf, buflen, "%pI6c", addr);
2281 /* Derived from rpc_sockaddr2uaddr */
2283 ff_layout_encode_netaddr(struct xdr_stream *xdr, struct nfs4_pnfs_ds_addr *da)
2285 struct sockaddr *sap = (struct sockaddr *)&da->da_addr;
2286 char portbuf[RPCBIND_MAXUADDRPLEN];
2287 char addrbuf[RPCBIND_MAXUADDRLEN];
2289 unsigned short port;
2293 switch (sap->sa_family) {
2295 if (ff_layout_ntop4(sap, addrbuf, sizeof(addrbuf)) == 0)
2297 port = ntohs(((struct sockaddr_in *)sap)->sin_port);
2302 if (ff_layout_ntop6_noscopeid(sap, addrbuf, sizeof(addrbuf)) == 0)
2304 port = ntohs(((struct sockaddr_in6 *)sap)->sin6_port);
2309 /* we only support tcp and tcp6 */
2314 snprintf(portbuf, sizeof(portbuf), ".%u.%u", port >> 8, port & 0xff);
2315 len = strlcat(addrbuf, portbuf, sizeof(addrbuf));
2317 p = xdr_reserve_space(xdr, 4 + netid_len);
2318 xdr_encode_opaque(p, netid, netid_len);
2320 p = xdr_reserve_space(xdr, 4 + len);
2321 xdr_encode_opaque(p, addrbuf, len);
2325 ff_layout_encode_nfstime(struct xdr_stream *xdr,
2328 struct timespec64 ts;
2331 p = xdr_reserve_space(xdr, 12);
2332 ts = ktime_to_timespec64(t);
2333 p = xdr_encode_hyper(p, ts.tv_sec);
2334 *p++ = cpu_to_be32(ts.tv_nsec);
2338 ff_layout_encode_io_latency(struct xdr_stream *xdr,
2339 struct nfs4_ff_io_stat *stat)
2343 p = xdr_reserve_space(xdr, 5 * 8);
2344 p = xdr_encode_hyper(p, stat->ops_requested);
2345 p = xdr_encode_hyper(p, stat->bytes_requested);
2346 p = xdr_encode_hyper(p, stat->ops_completed);
2347 p = xdr_encode_hyper(p, stat->bytes_completed);
2348 p = xdr_encode_hyper(p, stat->bytes_not_delivered);
2349 ff_layout_encode_nfstime(xdr, stat->total_busy_time);
2350 ff_layout_encode_nfstime(xdr, stat->aggregate_completion_time);
2354 ff_layout_encode_ff_layoutupdate(struct xdr_stream *xdr,
2355 const struct nfs42_layoutstat_devinfo *devinfo,
2356 struct nfs4_ff_layout_mirror *mirror)
2358 struct nfs4_pnfs_ds_addr *da;
2359 struct nfs4_pnfs_ds *ds = mirror->mirror_ds->ds;
2360 struct nfs_fh *fh = &mirror->fh_versions[0];
2363 da = list_first_entry(&ds->ds_addrs, struct nfs4_pnfs_ds_addr, da_node);
2364 dprintk("%s: DS %s: encoding address %s\n",
2365 __func__, ds->ds_remotestr, da->da_remotestr);
2367 ff_layout_encode_netaddr(xdr, da);
2369 p = xdr_reserve_space(xdr, 4 + fh->size);
2370 xdr_encode_opaque(p, fh->data, fh->size);
2371 /* ff_io_latency4 read */
2372 spin_lock(&mirror->lock);
2373 ff_layout_encode_io_latency(xdr, &mirror->read_stat.io_stat);
2374 /* ff_io_latency4 write */
2375 ff_layout_encode_io_latency(xdr, &mirror->write_stat.io_stat);
2376 spin_unlock(&mirror->lock);
2378 ff_layout_encode_nfstime(xdr, ktime_sub(ktime_get(), mirror->start_time));
2380 p = xdr_reserve_space(xdr, 4);
2381 *p = cpu_to_be32(false);
2385 ff_layout_encode_layoutstats(struct xdr_stream *xdr, const void *args,
2386 const struct nfs4_xdr_opaque_data *opaque)
2388 struct nfs42_layoutstat_devinfo *devinfo = container_of(opaque,
2389 struct nfs42_layoutstat_devinfo, ld_private);
2392 /* layoutupdate length */
2393 start = xdr_reserve_space(xdr, 4);
2394 ff_layout_encode_ff_layoutupdate(xdr, devinfo, opaque->data);
2396 *start = cpu_to_be32((xdr->p - start - 1) * 4);
2400 ff_layout_free_layoutstats(struct nfs4_xdr_opaque_data *opaque)
2402 struct nfs4_ff_layout_mirror *mirror = opaque->data;
2404 ff_layout_put_mirror(mirror);
2407 static const struct nfs4_xdr_opaque_ops layoutstat_ops = {
2408 .encode = ff_layout_encode_layoutstats,
2409 .free = ff_layout_free_layoutstats,
2413 ff_layout_mirror_prepare_stats(struct pnfs_layout_hdr *lo,
2414 struct nfs42_layoutstat_devinfo *devinfo,
2417 struct nfs4_flexfile_layout *ff_layout = FF_LAYOUT_FROM_HDR(lo);
2418 struct nfs4_ff_layout_mirror *mirror;
2419 struct nfs4_deviceid_node *dev;
2422 list_for_each_entry(mirror, &ff_layout->mirrors, mirrors) {
2425 if (IS_ERR_OR_NULL(mirror->mirror_ds))
2427 if (!test_and_clear_bit(NFS4_FF_MIRROR_STAT_AVAIL, &mirror->flags))
2429 /* mirror refcount put in cleanup_layoutstats */
2430 if (!refcount_inc_not_zero(&mirror->ref))
2432 dev = &mirror->mirror_ds->id_node;
2433 memcpy(&devinfo->dev_id, &dev->deviceid, NFS4_DEVICEID4_SIZE);
2434 devinfo->offset = 0;
2435 devinfo->length = NFS4_MAX_UINT64;
2436 spin_lock(&mirror->lock);
2437 devinfo->read_count = mirror->read_stat.io_stat.ops_completed;
2438 devinfo->read_bytes = mirror->read_stat.io_stat.bytes_completed;
2439 devinfo->write_count = mirror->write_stat.io_stat.ops_completed;
2440 devinfo->write_bytes = mirror->write_stat.io_stat.bytes_completed;
2441 spin_unlock(&mirror->lock);
2442 devinfo->layout_type = LAYOUT_FLEX_FILES;
2443 devinfo->ld_private.ops = &layoutstat_ops;
2444 devinfo->ld_private.data = mirror;
2453 ff_layout_prepare_layoutstats(struct nfs42_layoutstat_args *args)
2455 struct nfs4_flexfile_layout *ff_layout;
2456 const int dev_count = PNFS_LAYOUTSTATS_MAXDEV;
2458 /* For now, send at most PNFS_LAYOUTSTATS_MAXDEV statistics */
2459 args->devinfo = kmalloc_array(dev_count, sizeof(*args->devinfo), GFP_NOIO);
2463 spin_lock(&args->inode->i_lock);
2464 ff_layout = FF_LAYOUT_FROM_HDR(NFS_I(args->inode)->layout);
2465 args->num_dev = ff_layout_mirror_prepare_stats(&ff_layout->generic_hdr,
2466 &args->devinfo[0], dev_count);
2467 spin_unlock(&args->inode->i_lock);
2468 if (!args->num_dev) {
2469 kfree(args->devinfo);
2470 args->devinfo = NULL;
2478 ff_layout_set_layoutdriver(struct nfs_server *server,
2479 const struct nfs_fh *dummy)
2481 #if IS_ENABLED(CONFIG_NFS_V4_2)
2482 server->caps |= NFS_CAP_LAYOUTSTATS;
2487 static const struct pnfs_commit_ops ff_layout_commit_ops = {
2488 .setup_ds_info = ff_layout_setup_ds_info,
2489 .release_ds_info = ff_layout_release_ds_info,
2490 .mark_request_commit = pnfs_layout_mark_request_commit,
2491 .clear_request_commit = pnfs_generic_clear_request_commit,
2492 .scan_commit_lists = pnfs_generic_scan_commit_lists,
2493 .recover_commit_reqs = pnfs_generic_recover_commit_reqs,
2494 .commit_pagelist = ff_layout_commit_pagelist,
2497 static struct pnfs_layoutdriver_type flexfilelayout_type = {
2498 .id = LAYOUT_FLEX_FILES,
2499 .name = "LAYOUT_FLEX_FILES",
2500 .owner = THIS_MODULE,
2501 .flags = PNFS_LAYOUTGET_ON_OPEN,
2502 .max_layoutget_response = 4096, /* 1 page or so... */
2503 .set_layoutdriver = ff_layout_set_layoutdriver,
2504 .alloc_layout_hdr = ff_layout_alloc_layout_hdr,
2505 .free_layout_hdr = ff_layout_free_layout_hdr,
2506 .alloc_lseg = ff_layout_alloc_lseg,
2507 .free_lseg = ff_layout_free_lseg,
2508 .add_lseg = ff_layout_add_lseg,
2509 .pg_read_ops = &ff_layout_pg_read_ops,
2510 .pg_write_ops = &ff_layout_pg_write_ops,
2511 .get_ds_info = ff_layout_get_ds_info,
2512 .free_deviceid_node = ff_layout_free_deviceid_node,
2513 .read_pagelist = ff_layout_read_pagelist,
2514 .write_pagelist = ff_layout_write_pagelist,
2515 .alloc_deviceid_node = ff_layout_alloc_deviceid_node,
2516 .prepare_layoutreturn = ff_layout_prepare_layoutreturn,
2517 .sync = pnfs_nfs_generic_sync,
2518 .prepare_layoutstats = ff_layout_prepare_layoutstats,
2521 static int __init nfs4flexfilelayout_init(void)
2523 printk(KERN_INFO "%s: NFSv4 Flexfile Layout Driver Registering...\n",
2525 return pnfs_register_layoutdriver(&flexfilelayout_type);
2528 static void __exit nfs4flexfilelayout_exit(void)
2530 printk(KERN_INFO "%s: NFSv4 Flexfile Layout Driver Unregistering...\n",
2532 pnfs_unregister_layoutdriver(&flexfilelayout_type);
2535 MODULE_ALIAS("nfs-layouttype4-4");
2537 MODULE_LICENSE("GPL");
2538 MODULE_DESCRIPTION("The NFSv4 flexfile layout driver");
2540 module_init(nfs4flexfilelayout_init);
2541 module_exit(nfs4flexfilelayout_exit);
2543 module_param(io_maxretrans, ushort, 0644);
2544 MODULE_PARM_DESC(io_maxretrans, "The number of times the NFSv4.1 client "
2545 "retries an I/O request before returning an error. ");