2 * Module for pnfs flexfile layout driver.
4 * Copyright (c) 2014, Primary Data, Inc. All rights reserved.
6 * Tao Peng <bergwolf@primarydata.com>
9 #include <linux/nfs_fs.h>
10 #include <linux/nfs_page.h>
11 #include <linux/module.h>
13 #include <linux/sunrpc/metrics.h>
15 #include "flexfilelayout.h"
16 #include "../nfs4session.h"
17 #include "../nfs4idmap.h"
18 #include "../internal.h"
19 #include "../delegation.h"
20 #include "../nfs4trace.h"
21 #include "../iostat.h"
25 #define NFSDBG_FACILITY NFSDBG_PNFS_LD
27 #define FF_LAYOUT_POLL_RETRY_MAX (15*HZ)
29 static struct pnfs_layout_hdr *
30 ff_layout_alloc_layout_hdr(struct inode *inode, gfp_t gfp_flags)
32 struct nfs4_flexfile_layout *ffl;
34 ffl = kzalloc(sizeof(*ffl), gfp_flags);
36 INIT_LIST_HEAD(&ffl->error_list);
37 INIT_LIST_HEAD(&ffl->mirrors);
38 return &ffl->generic_hdr;
44 ff_layout_free_layout_hdr(struct pnfs_layout_hdr *lo)
46 struct nfs4_ff_layout_ds_err *err, *n;
48 list_for_each_entry_safe(err, n, &FF_LAYOUT_FROM_HDR(lo)->error_list,
53 kfree(FF_LAYOUT_FROM_HDR(lo));
56 static int decode_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
60 p = xdr_inline_decode(xdr, NFS4_STATEID_SIZE);
61 if (unlikely(p == NULL))
63 memcpy(stateid, p, NFS4_STATEID_SIZE);
64 dprintk("%s: stateid id= [%x%x%x%x]\n", __func__,
65 p[0], p[1], p[2], p[3]);
69 static int decode_deviceid(struct xdr_stream *xdr, struct nfs4_deviceid *devid)
73 p = xdr_inline_decode(xdr, NFS4_DEVICEID4_SIZE);
76 memcpy(devid, p, NFS4_DEVICEID4_SIZE);
77 nfs4_print_deviceid(devid);
81 static int decode_nfs_fh(struct xdr_stream *xdr, struct nfs_fh *fh)
85 p = xdr_inline_decode(xdr, 4);
88 fh->size = be32_to_cpup(p++);
89 if (fh->size > sizeof(struct nfs_fh)) {
90 printk(KERN_ERR "NFS flexfiles: Too big fh received %d\n",
95 p = xdr_inline_decode(xdr, fh->size);
98 memcpy(&fh->data, p, fh->size);
99 dprintk("%s: fh len %d\n", __func__, fh->size);
105 * Currently only stringified uids and gids are accepted.
106 * I.e., kerberos is not supported to the DSes, so no pricipals.
108 * That means that one common function will suffice, but when
109 * principals are added, this should be split to accomodate
110 * calls to both nfs_map_name_to_uid() and nfs_map_group_to_gid().
113 decode_name(struct xdr_stream *xdr, u32 *id)
118 /* opaque_length(4)*/
119 p = xdr_inline_decode(xdr, 4);
122 len = be32_to_cpup(p++);
126 dprintk("%s: len %u\n", __func__, len);
129 p = xdr_inline_decode(xdr, len);
133 if (!nfs_map_string_to_numeric((char *)p, len, id))
139 static bool ff_mirror_match_fh(const struct nfs4_ff_layout_mirror *m1,
140 const struct nfs4_ff_layout_mirror *m2)
144 if (m1->fh_versions_cnt != m2->fh_versions_cnt)
146 for (i = 0; i < m1->fh_versions_cnt; i++) {
147 bool found_fh = false;
148 for (j = 0; j < m2->fh_versions_cnt; i++) {
149 if (nfs_compare_fh(&m1->fh_versions[i],
150 &m2->fh_versions[j]) == 0) {
161 static struct nfs4_ff_layout_mirror *
162 ff_layout_add_mirror(struct pnfs_layout_hdr *lo,
163 struct nfs4_ff_layout_mirror *mirror)
165 struct nfs4_flexfile_layout *ff_layout = FF_LAYOUT_FROM_HDR(lo);
166 struct nfs4_ff_layout_mirror *pos;
167 struct inode *inode = lo->plh_inode;
169 spin_lock(&inode->i_lock);
170 list_for_each_entry(pos, &ff_layout->mirrors, mirrors) {
171 if (mirror->mirror_ds != pos->mirror_ds)
173 if (!ff_mirror_match_fh(mirror, pos))
175 if (atomic_inc_not_zero(&pos->ref)) {
176 spin_unlock(&inode->i_lock);
180 list_add(&mirror->mirrors, &ff_layout->mirrors);
182 spin_unlock(&inode->i_lock);
187 ff_layout_remove_mirror(struct nfs4_ff_layout_mirror *mirror)
190 if (mirror->layout == NULL)
192 inode = mirror->layout->plh_inode;
193 spin_lock(&inode->i_lock);
194 list_del(&mirror->mirrors);
195 spin_unlock(&inode->i_lock);
196 mirror->layout = NULL;
199 static struct nfs4_ff_layout_mirror *ff_layout_alloc_mirror(gfp_t gfp_flags)
201 struct nfs4_ff_layout_mirror *mirror;
203 mirror = kzalloc(sizeof(*mirror), gfp_flags);
204 if (mirror != NULL) {
205 spin_lock_init(&mirror->lock);
206 atomic_set(&mirror->ref, 1);
207 INIT_LIST_HEAD(&mirror->mirrors);
212 static void ff_layout_free_mirror(struct nfs4_ff_layout_mirror *mirror)
214 ff_layout_remove_mirror(mirror);
215 kfree(mirror->fh_versions);
216 nfs4_ff_layout_put_deviceid(mirror->mirror_ds);
220 static void ff_layout_put_mirror(struct nfs4_ff_layout_mirror *mirror)
222 if (mirror != NULL && atomic_dec_and_test(&mirror->ref))
223 ff_layout_free_mirror(mirror);
226 static void ff_layout_free_mirror_array(struct nfs4_ff_layout_segment *fls)
230 if (fls->mirror_array) {
231 for (i = 0; i < fls->mirror_array_cnt; i++) {
232 /* normally mirror_ds is freed in
233 * .free_deviceid_node but we still do it here
234 * for .alloc_lseg error path */
235 ff_layout_put_mirror(fls->mirror_array[i]);
237 kfree(fls->mirror_array);
238 fls->mirror_array = NULL;
242 static int ff_layout_check_layout(struct nfs4_layoutget_res *lgr)
246 dprintk("--> %s\n", __func__);
248 /* FIXME: remove this check when layout segment support is added */
249 if (lgr->range.offset != 0 ||
250 lgr->range.length != NFS4_MAX_UINT64) {
251 dprintk("%s Only whole file layouts supported. Use MDS i/o\n",
256 dprintk("--> %s returns %d\n", __func__, ret);
260 static void _ff_layout_free_lseg(struct nfs4_ff_layout_segment *fls)
263 ff_layout_free_mirror_array(fls);
268 static void ff_layout_sort_mirrors(struct nfs4_ff_layout_segment *fls)
272 for (i = 0; i < fls->mirror_array_cnt - 1; i++) {
273 for (j = i + 1; j < fls->mirror_array_cnt; j++)
274 if (fls->mirror_array[i]->efficiency <
275 fls->mirror_array[j]->efficiency)
276 swap(fls->mirror_array[i],
277 fls->mirror_array[j]);
281 static struct pnfs_layout_segment *
282 ff_layout_alloc_lseg(struct pnfs_layout_hdr *lh,
283 struct nfs4_layoutget_res *lgr,
286 struct pnfs_layout_segment *ret;
287 struct nfs4_ff_layout_segment *fls = NULL;
288 struct xdr_stream stream;
290 struct page *scratch;
292 u32 mirror_array_cnt;
296 dprintk("--> %s\n", __func__);
297 scratch = alloc_page(gfp_flags);
299 return ERR_PTR(-ENOMEM);
301 xdr_init_decode_pages(&stream, &buf, lgr->layoutp->pages,
303 xdr_set_scratch_buffer(&stream, page_address(scratch), PAGE_SIZE);
305 /* stripe unit and mirror_array_cnt */
307 p = xdr_inline_decode(&stream, 8 + 4);
311 p = xdr_decode_hyper(p, &stripe_unit);
312 mirror_array_cnt = be32_to_cpup(p++);
313 dprintk("%s: stripe_unit=%llu mirror_array_cnt=%u\n", __func__,
314 stripe_unit, mirror_array_cnt);
316 if (mirror_array_cnt > NFS4_FLEXFILE_LAYOUT_MAX_MIRROR_CNT ||
317 mirror_array_cnt == 0)
321 fls = kzalloc(sizeof(*fls), gfp_flags);
325 fls->mirror_array_cnt = mirror_array_cnt;
326 fls->stripe_unit = stripe_unit;
327 fls->mirror_array = kcalloc(fls->mirror_array_cnt,
328 sizeof(fls->mirror_array[0]), gfp_flags);
329 if (fls->mirror_array == NULL)
332 for (i = 0; i < fls->mirror_array_cnt; i++) {
333 struct nfs4_ff_layout_mirror *mirror;
334 struct nfs4_deviceid devid;
335 struct nfs4_deviceid_node *idnode;
341 p = xdr_inline_decode(&stream, 4);
344 ds_count = be32_to_cpup(p);
346 /* FIXME: allow for striping? */
350 fls->mirror_array[i] = ff_layout_alloc_mirror(gfp_flags);
351 if (fls->mirror_array[i] == NULL) {
356 fls->mirror_array[i]->ds_count = ds_count;
359 rc = decode_deviceid(&stream, &devid);
363 idnode = nfs4_find_get_deviceid(NFS_SERVER(lh->plh_inode),
364 &devid, lh->plh_lc_cred,
367 * upon success, mirror_ds is allocated by previous
368 * getdeviceinfo, or newly by .alloc_deviceid_node
369 * nfs4_find_get_deviceid failure is indeed getdeviceinfo falure
372 fls->mirror_array[i]->mirror_ds =
373 FF_LAYOUT_MIRROR_DS(idnode);
379 p = xdr_inline_decode(&stream, 4);
382 fls->mirror_array[i]->efficiency = be32_to_cpup(p);
385 rc = decode_stateid(&stream, &fls->mirror_array[i]->stateid);
390 p = xdr_inline_decode(&stream, 4);
393 fh_count = be32_to_cpup(p);
395 fls->mirror_array[i]->fh_versions =
396 kzalloc(fh_count * sizeof(struct nfs_fh),
398 if (fls->mirror_array[i]->fh_versions == NULL) {
403 for (j = 0; j < fh_count; j++) {
404 rc = decode_nfs_fh(&stream,
405 &fls->mirror_array[i]->fh_versions[j]);
410 fls->mirror_array[i]->fh_versions_cnt = fh_count;
413 rc = decode_name(&stream, &fls->mirror_array[i]->uid);
418 rc = decode_name(&stream, &fls->mirror_array[i]->gid);
422 mirror = ff_layout_add_mirror(lh, fls->mirror_array[i]);
423 if (mirror != fls->mirror_array[i]) {
424 ff_layout_free_mirror(fls->mirror_array[i]);
425 fls->mirror_array[i] = mirror;
428 dprintk("%s: uid %d gid %d\n", __func__,
429 fls->mirror_array[i]->uid,
430 fls->mirror_array[i]->gid);
433 p = xdr_inline_decode(&stream, 4);
435 fls->flags = be32_to_cpup(p);
437 ff_layout_sort_mirrors(fls);
438 rc = ff_layout_check_layout(lgr);
442 ret = &fls->generic_hdr;
443 dprintk("<-- %s (success)\n", __func__);
445 __free_page(scratch);
448 _ff_layout_free_lseg(fls);
450 dprintk("<-- %s (%d)\n", __func__, rc);
454 static bool ff_layout_has_rw_segments(struct pnfs_layout_hdr *layout)
456 struct pnfs_layout_segment *lseg;
458 list_for_each_entry(lseg, &layout->plh_segs, pls_list)
459 if (lseg->pls_range.iomode == IOMODE_RW)
466 ff_layout_free_lseg(struct pnfs_layout_segment *lseg)
468 struct nfs4_ff_layout_segment *fls = FF_LAYOUT_LSEG(lseg);
471 dprintk("--> %s\n", __func__);
473 for (i = 0; i < fls->mirror_array_cnt; i++) {
474 if (fls->mirror_array[i]) {
475 nfs4_ff_layout_put_deviceid(fls->mirror_array[i]->mirror_ds);
476 fls->mirror_array[i]->mirror_ds = NULL;
477 if (fls->mirror_array[i]->cred) {
478 put_rpccred(fls->mirror_array[i]->cred);
479 fls->mirror_array[i]->cred = NULL;
484 if (lseg->pls_range.iomode == IOMODE_RW) {
485 struct nfs4_flexfile_layout *ffl;
488 ffl = FF_LAYOUT_FROM_HDR(lseg->pls_layout);
489 inode = ffl->generic_hdr.plh_inode;
490 spin_lock(&inode->i_lock);
491 if (!ff_layout_has_rw_segments(lseg->pls_layout)) {
492 ffl->commit_info.nbuckets = 0;
493 kfree(ffl->commit_info.buckets);
494 ffl->commit_info.buckets = NULL;
496 spin_unlock(&inode->i_lock);
498 _ff_layout_free_lseg(fls);
501 /* Return 1 until we have multiple lsegs support */
503 ff_layout_get_lseg_count(struct nfs4_ff_layout_segment *fls)
509 nfs4_ff_start_busy_timer(struct nfs4_ff_busy_timer *timer, ktime_t now)
511 /* first IO request? */
512 if (atomic_inc_return(&timer->n_ops) == 1) {
513 timer->start_time = now;
518 nfs4_ff_end_busy_timer(struct nfs4_ff_busy_timer *timer, ktime_t now)
522 if (atomic_dec_return(&timer->n_ops) < 0)
525 start = timer->start_time;
526 timer->start_time = now;
527 return ktime_sub(now, start);
531 nfs4_ff_layoutstat_start_io(struct nfs4_ff_layout_mirror *mirror,
532 struct nfs4_ff_layoutstat *layoutstat,
535 static const ktime_t notime = {0};
537 nfs4_ff_start_busy_timer(&layoutstat->busy_timer, now);
538 if (ktime_equal(mirror->start_time, notime))
539 mirror->start_time = now;
540 if (ktime_equal(mirror->last_report_time, notime))
541 mirror->last_report_time = now;
542 if (ktime_to_ms(ktime_sub(now, mirror->last_report_time)) >=
543 FF_LAYOUTSTATS_REPORT_INTERVAL) {
544 mirror->last_report_time = now;
552 nfs4_ff_layout_stat_io_update_requested(struct nfs4_ff_layoutstat *layoutstat,
555 struct nfs4_ff_io_stat *iostat = &layoutstat->io_stat;
557 iostat->ops_requested++;
558 iostat->bytes_requested += requested;
562 nfs4_ff_layout_stat_io_update_completed(struct nfs4_ff_layoutstat *layoutstat,
565 ktime_t time_completed,
566 ktime_t time_started)
568 struct nfs4_ff_io_stat *iostat = &layoutstat->io_stat;
569 ktime_t completion_time = ktime_sub(time_completed, time_started);
572 iostat->ops_completed++;
573 iostat->bytes_completed += completed;
574 iostat->bytes_not_delivered += requested - completed;
576 timer = nfs4_ff_end_busy_timer(&layoutstat->busy_timer, time_completed);
577 iostat->total_busy_time =
578 ktime_add(iostat->total_busy_time, timer);
579 iostat->aggregate_completion_time =
580 ktime_add(iostat->aggregate_completion_time,
585 nfs4_ff_layout_stat_io_start_read(struct inode *inode,
586 struct nfs4_ff_layout_mirror *mirror,
587 __u64 requested, ktime_t now)
591 spin_lock(&mirror->lock);
592 report = nfs4_ff_layoutstat_start_io(mirror, &mirror->read_stat, now);
593 nfs4_ff_layout_stat_io_update_requested(&mirror->read_stat, requested);
594 spin_unlock(&mirror->lock);
597 pnfs_report_layoutstat(inode, GFP_KERNEL);
601 nfs4_ff_layout_stat_io_end_read(struct rpc_task *task,
602 struct nfs4_ff_layout_mirror *mirror,
606 spin_lock(&mirror->lock);
607 nfs4_ff_layout_stat_io_update_completed(&mirror->read_stat,
608 requested, completed,
609 ktime_get(), task->tk_start);
610 spin_unlock(&mirror->lock);
614 nfs4_ff_layout_stat_io_start_write(struct inode *inode,
615 struct nfs4_ff_layout_mirror *mirror,
616 __u64 requested, ktime_t now)
620 spin_lock(&mirror->lock);
621 report = nfs4_ff_layoutstat_start_io(mirror , &mirror->write_stat, now);
622 nfs4_ff_layout_stat_io_update_requested(&mirror->write_stat, requested);
623 spin_unlock(&mirror->lock);
626 pnfs_report_layoutstat(inode, GFP_NOIO);
630 nfs4_ff_layout_stat_io_end_write(struct rpc_task *task,
631 struct nfs4_ff_layout_mirror *mirror,
634 enum nfs3_stable_how committed)
636 if (committed == NFS_UNSTABLE)
637 requested = completed = 0;
639 spin_lock(&mirror->lock);
640 nfs4_ff_layout_stat_io_update_completed(&mirror->write_stat,
641 requested, completed, ktime_get(), task->tk_start);
642 spin_unlock(&mirror->lock);
646 ff_layout_alloc_commit_info(struct pnfs_layout_segment *lseg,
647 struct nfs_commit_info *cinfo,
650 struct nfs4_ff_layout_segment *fls = FF_LAYOUT_LSEG(lseg);
651 struct pnfs_commit_bucket *buckets;
654 if (cinfo->ds->nbuckets != 0) {
655 /* This assumes there is only one RW lseg per file.
656 * To support multiple lseg per file, we need to
657 * change struct pnfs_commit_bucket to allow dynamic
658 * increasing nbuckets.
663 size = ff_layout_get_lseg_count(fls) * FF_LAYOUT_MIRROR_COUNT(lseg);
665 buckets = kcalloc(size, sizeof(struct pnfs_commit_bucket),
672 spin_lock(cinfo->lock);
673 if (cinfo->ds->nbuckets != 0)
676 cinfo->ds->buckets = buckets;
677 cinfo->ds->nbuckets = size;
678 for (i = 0; i < size; i++) {
679 INIT_LIST_HEAD(&buckets[i].written);
680 INIT_LIST_HEAD(&buckets[i].committing);
681 /* mark direct verifier as unset */
682 buckets[i].direct_verf.committed =
683 NFS_INVALID_STABLE_HOW;
686 spin_unlock(cinfo->lock);
691 static struct nfs4_pnfs_ds *
692 ff_layout_choose_best_ds_for_read(struct nfs_pageio_descriptor *pgio,
695 struct nfs4_ff_layout_segment *fls;
696 struct nfs4_pnfs_ds *ds;
699 fls = FF_LAYOUT_LSEG(pgio->pg_lseg);
700 /* mirrors are sorted by efficiency */
701 for (idx = 0; idx < fls->mirror_array_cnt; idx++) {
702 ds = nfs4_ff_layout_prepare_ds(pgio->pg_lseg, idx, false);
713 ff_layout_pg_init_read(struct nfs_pageio_descriptor *pgio,
714 struct nfs_page *req)
716 struct nfs_pgio_mirror *pgm;
717 struct nfs4_ff_layout_mirror *mirror;
718 struct nfs4_pnfs_ds *ds;
721 /* Use full layout for now */
723 pgio->pg_lseg = pnfs_update_layout(pgio->pg_inode,
729 /* If no lseg, fall back to read through mds */
730 if (pgio->pg_lseg == NULL)
733 ds = ff_layout_choose_best_ds_for_read(pgio, &ds_idx);
736 mirror = FF_LAYOUT_COMP(pgio->pg_lseg, ds_idx);
738 pgio->pg_mirror_idx = ds_idx;
740 /* read always uses only one mirror - idx 0 for pgio layer */
741 pgm = &pgio->pg_mirrors[0];
742 pgm->pg_bsize = mirror->mirror_ds->ds_versions[0].rsize;
746 pnfs_put_lseg(pgio->pg_lseg);
747 pgio->pg_lseg = NULL;
748 nfs_pageio_reset_read_mds(pgio);
752 ff_layout_pg_init_write(struct nfs_pageio_descriptor *pgio,
753 struct nfs_page *req)
755 struct nfs4_ff_layout_mirror *mirror;
756 struct nfs_pgio_mirror *pgm;
757 struct nfs_commit_info cinfo;
758 struct nfs4_pnfs_ds *ds;
763 pgio->pg_lseg = pnfs_update_layout(pgio->pg_inode,
769 /* If no lseg, fall back to write through mds */
770 if (pgio->pg_lseg == NULL)
773 nfs_init_cinfo(&cinfo, pgio->pg_inode, pgio->pg_dreq);
774 status = ff_layout_alloc_commit_info(pgio->pg_lseg, &cinfo, GFP_NOFS);
778 /* Use a direct mapping of ds_idx to pgio mirror_idx */
779 if (WARN_ON_ONCE(pgio->pg_mirror_count !=
780 FF_LAYOUT_MIRROR_COUNT(pgio->pg_lseg)))
783 for (i = 0; i < pgio->pg_mirror_count; i++) {
784 ds = nfs4_ff_layout_prepare_ds(pgio->pg_lseg, i, true);
787 pgm = &pgio->pg_mirrors[i];
788 mirror = FF_LAYOUT_COMP(pgio->pg_lseg, i);
789 pgm->pg_bsize = mirror->mirror_ds->ds_versions[0].wsize;
795 pnfs_put_lseg(pgio->pg_lseg);
796 pgio->pg_lseg = NULL;
797 nfs_pageio_reset_write_mds(pgio);
801 ff_layout_pg_get_mirror_count_write(struct nfs_pageio_descriptor *pgio,
802 struct nfs_page *req)
805 pgio->pg_lseg = pnfs_update_layout(pgio->pg_inode,
812 return FF_LAYOUT_MIRROR_COUNT(pgio->pg_lseg);
814 /* no lseg means that pnfs is not in use, so no mirroring here */
815 nfs_pageio_reset_write_mds(pgio);
819 static const struct nfs_pageio_ops ff_layout_pg_read_ops = {
820 .pg_init = ff_layout_pg_init_read,
821 .pg_test = pnfs_generic_pg_test,
822 .pg_doio = pnfs_generic_pg_readpages,
823 .pg_cleanup = pnfs_generic_pg_cleanup,
826 static const struct nfs_pageio_ops ff_layout_pg_write_ops = {
827 .pg_init = ff_layout_pg_init_write,
828 .pg_test = pnfs_generic_pg_test,
829 .pg_doio = pnfs_generic_pg_writepages,
830 .pg_get_mirror_count = ff_layout_pg_get_mirror_count_write,
831 .pg_cleanup = pnfs_generic_pg_cleanup,
834 static void ff_layout_reset_write(struct nfs_pgio_header *hdr, bool retry_pnfs)
836 struct rpc_task *task = &hdr->task;
838 pnfs_layoutcommit_inode(hdr->inode, false);
841 dprintk("%s Reset task %5u for i/o through pNFS "
842 "(req %s/%llu, %u bytes @ offset %llu)\n", __func__,
844 hdr->inode->i_sb->s_id,
845 (unsigned long long)NFS_FILEID(hdr->inode),
847 (unsigned long long)hdr->args.offset);
850 struct nfs_open_context *ctx;
852 ctx = nfs_list_entry(hdr->pages.next)->wb_context;
853 set_bit(NFS_CONTEXT_RESEND_WRITES, &ctx->flags);
854 hdr->completion_ops->error_cleanup(&hdr->pages);
856 nfs_direct_set_resched_writes(hdr->dreq);
857 /* fake unstable write to let common nfs resend pages */
858 hdr->verf.committed = NFS_UNSTABLE;
859 hdr->good_bytes = hdr->args.count;
864 if (!test_and_set_bit(NFS_IOHDR_REDO, &hdr->flags)) {
865 dprintk("%s Reset task %5u for i/o through MDS "
866 "(req %s/%llu, %u bytes @ offset %llu)\n", __func__,
868 hdr->inode->i_sb->s_id,
869 (unsigned long long)NFS_FILEID(hdr->inode),
871 (unsigned long long)hdr->args.offset);
873 task->tk_status = pnfs_write_done_resend_to_mds(hdr);
877 static void ff_layout_reset_read(struct nfs_pgio_header *hdr)
879 struct rpc_task *task = &hdr->task;
881 pnfs_layoutcommit_inode(hdr->inode, false);
883 if (!test_and_set_bit(NFS_IOHDR_REDO, &hdr->flags)) {
884 dprintk("%s Reset task %5u for i/o through MDS "
885 "(req %s/%llu, %u bytes @ offset %llu)\n", __func__,
887 hdr->inode->i_sb->s_id,
888 (unsigned long long)NFS_FILEID(hdr->inode),
890 (unsigned long long)hdr->args.offset);
892 task->tk_status = pnfs_read_done_resend_to_mds(hdr);
896 static int ff_layout_async_handle_error_v4(struct rpc_task *task,
897 struct nfs4_state *state,
898 struct nfs_client *clp,
899 struct pnfs_layout_segment *lseg,
902 struct pnfs_layout_hdr *lo = lseg->pls_layout;
903 struct inode *inode = lo->plh_inode;
904 struct nfs_server *mds_server = NFS_SERVER(inode);
906 struct nfs4_deviceid_node *devid = FF_LAYOUT_DEVID_NODE(lseg, idx);
907 struct nfs_client *mds_client = mds_server->nfs_client;
908 struct nfs4_slot_table *tbl = &clp->cl_session->fc_slot_table;
910 if (task->tk_status >= 0)
913 switch (task->tk_status) {
914 /* MDS state errors */
915 case -NFS4ERR_DELEG_REVOKED:
916 case -NFS4ERR_ADMIN_REVOKED:
917 case -NFS4ERR_BAD_STATEID:
920 nfs_remove_bad_delegation(state->inode);
921 case -NFS4ERR_OPENMODE:
924 if (nfs4_schedule_stateid_recovery(mds_server, state) < 0)
925 goto out_bad_stateid;
926 goto wait_on_recovery;
927 case -NFS4ERR_EXPIRED:
929 if (nfs4_schedule_stateid_recovery(mds_server, state) < 0)
930 goto out_bad_stateid;
932 nfs4_schedule_lease_recovery(mds_client);
933 goto wait_on_recovery;
934 /* DS session errors */
935 case -NFS4ERR_BADSESSION:
936 case -NFS4ERR_BADSLOT:
937 case -NFS4ERR_BAD_HIGH_SLOT:
938 case -NFS4ERR_DEADSESSION:
939 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
940 case -NFS4ERR_SEQ_FALSE_RETRY:
941 case -NFS4ERR_SEQ_MISORDERED:
942 dprintk("%s ERROR %d, Reset session. Exchangeid "
943 "flags 0x%x\n", __func__, task->tk_status,
944 clp->cl_exchange_flags);
945 nfs4_schedule_session_recovery(clp->cl_session, task->tk_status);
949 rpc_delay(task, FF_LAYOUT_POLL_RETRY_MAX);
951 case -NFS4ERR_RETRY_UNCACHED_REP:
953 /* Invalidate Layout errors */
954 case -NFS4ERR_PNFS_NO_LAYOUT:
955 case -ESTALE: /* mapped NFS4ERR_STALE */
956 case -EBADHANDLE: /* mapped NFS4ERR_BADHANDLE */
957 case -EISDIR: /* mapped NFS4ERR_ISDIR */
958 case -NFS4ERR_FHEXPIRED:
959 case -NFS4ERR_WRONG_TYPE:
960 dprintk("%s Invalid layout error %d\n", __func__,
963 * Destroy layout so new i/o will get a new layout.
964 * Layout will not be destroyed until all current lseg
965 * references are put. Mark layout as invalid to resend failed
966 * i/o and all i/o waiting on the slot table to the MDS until
967 * layout is destroyed and a new valid layout is obtained.
969 pnfs_destroy_layout(NFS_I(inode));
970 rpc_wake_up(&tbl->slot_tbl_waitq);
972 /* RPC connection errors */
980 dprintk("%s DS connection error %d\n", __func__,
982 nfs4_mark_deviceid_unavailable(devid);
983 rpc_wake_up(&tbl->slot_tbl_waitq);
986 if (ff_layout_has_available_ds(lseg))
987 return -NFS4ERR_RESET_TO_PNFS;
989 dprintk("%s Retry through MDS. Error %d\n", __func__,
991 return -NFS4ERR_RESET_TO_MDS;
997 task->tk_status = -EIO;
1000 rpc_sleep_on(&mds_client->cl_rpcwaitq, task, NULL);
1001 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &mds_client->cl_state) == 0)
1002 rpc_wake_up_queued_task(&mds_client->cl_rpcwaitq, task);
1006 /* Retry all errors through either pNFS or MDS except for -EJUKEBOX */
1007 static int ff_layout_async_handle_error_v3(struct rpc_task *task,
1008 struct pnfs_layout_segment *lseg,
1011 struct nfs4_deviceid_node *devid = FF_LAYOUT_DEVID_NODE(lseg, idx);
1013 if (task->tk_status >= 0)
1016 if (task->tk_status != -EJUKEBOX) {
1017 dprintk("%s DS connection error %d\n", __func__,
1019 nfs4_mark_deviceid_unavailable(devid);
1020 if (ff_layout_has_available_ds(lseg))
1021 return -NFS4ERR_RESET_TO_PNFS;
1023 return -NFS4ERR_RESET_TO_MDS;
1026 if (task->tk_status == -EJUKEBOX)
1027 nfs_inc_stats(lseg->pls_layout->plh_inode, NFSIOS_DELAY);
1028 task->tk_status = 0;
1029 rpc_restart_call(task);
1030 rpc_delay(task, NFS_JUKEBOX_RETRY_TIME);
1034 static int ff_layout_async_handle_error(struct rpc_task *task,
1035 struct nfs4_state *state,
1036 struct nfs_client *clp,
1037 struct pnfs_layout_segment *lseg,
1040 int vers = clp->cl_nfs_mod->rpc_vers->number;
1044 return ff_layout_async_handle_error_v3(task, lseg, idx);
1046 return ff_layout_async_handle_error_v4(task, state, clp,
1049 /* should never happen */
1055 static void ff_layout_io_track_ds_error(struct pnfs_layout_segment *lseg,
1056 int idx, u64 offset, u64 length,
1057 u32 status, int opnum, int error)
1059 struct nfs4_ff_layout_mirror *mirror;
1066 case -EPROTONOSUPPORT:
1077 status = NFS4ERR_NXIO;
1080 status = NFS4ERR_ACCESS;
1087 mirror = FF_LAYOUT_COMP(lseg, idx);
1088 err = ff_layout_track_ds_error(FF_LAYOUT_FROM_HDR(lseg->pls_layout),
1089 mirror, offset, length, status, opnum,
1091 dprintk("%s: err %d op %d status %u\n", __func__, err, opnum, status);
1094 /* NFS_PROTO call done callback routines */
1096 static int ff_layout_read_done_cb(struct rpc_task *task,
1097 struct nfs_pgio_header *hdr)
1099 struct inode *inode;
1102 trace_nfs4_pnfs_read(hdr, task->tk_status);
1103 if (task->tk_status < 0)
1104 ff_layout_io_track_ds_error(hdr->lseg, hdr->pgio_mirror_idx,
1105 hdr->args.offset, hdr->args.count,
1106 hdr->res.op_status, OP_READ,
1108 err = ff_layout_async_handle_error(task, hdr->args.context->state,
1109 hdr->ds_clp, hdr->lseg,
1110 hdr->pgio_mirror_idx);
1113 case -NFS4ERR_RESET_TO_PNFS:
1114 set_bit(NFS_LAYOUT_RETURN_BEFORE_CLOSE,
1115 &hdr->lseg->pls_layout->plh_flags);
1116 pnfs_read_resend_pnfs(hdr);
1117 return task->tk_status;
1118 case -NFS4ERR_RESET_TO_MDS:
1119 inode = hdr->lseg->pls_layout->plh_inode;
1120 pnfs_error_mark_layout_for_return(inode, hdr->lseg);
1121 ff_layout_reset_read(hdr);
1122 return task->tk_status;
1124 rpc_restart_call_prepare(task);
1132 ff_layout_need_layoutcommit(struct pnfs_layout_segment *lseg)
1134 return !(FF_LAYOUT_LSEG(lseg)->flags & FF_FLAGS_NO_LAYOUTCOMMIT);
1138 * We reference the rpc_cred of the first WRITE that triggers the need for
1139 * a LAYOUTCOMMIT, and use it to send the layoutcommit compound.
1140 * rfc5661 is not clear about which credential should be used.
1142 * Flexlayout client should treat DS replied FILE_SYNC as DATA_SYNC, so
1143 * to follow http://www.rfc-editor.org/errata_search.php?rfc=5661&eid=2751
1144 * we always send layoutcommit after DS writes.
1147 ff_layout_set_layoutcommit(struct nfs_pgio_header *hdr)
1149 if (!ff_layout_need_layoutcommit(hdr->lseg))
1152 pnfs_set_layoutcommit(hdr->inode, hdr->lseg,
1153 hdr->mds_offset + hdr->res.count);
1154 dprintk("%s inode %lu pls_end_pos %lu\n", __func__, hdr->inode->i_ino,
1155 (unsigned long) NFS_I(hdr->inode)->layout->plh_lwb);
1159 ff_layout_reset_to_mds(struct pnfs_layout_segment *lseg, int idx)
1161 /* No mirroring for now */
1162 struct nfs4_deviceid_node *node = FF_LAYOUT_DEVID_NODE(lseg, idx);
1164 return ff_layout_test_devid_unavailable(node);
1167 static int ff_layout_read_prepare_common(struct rpc_task *task,
1168 struct nfs_pgio_header *hdr)
1170 nfs4_ff_layout_stat_io_start_read(hdr->inode,
1171 FF_LAYOUT_COMP(hdr->lseg, hdr->pgio_mirror_idx),
1175 if (unlikely(test_bit(NFS_CONTEXT_BAD, &hdr->args.context->flags))) {
1176 rpc_exit(task, -EIO);
1179 if (ff_layout_reset_to_mds(hdr->lseg, hdr->pgio_mirror_idx)) {
1180 dprintk("%s task %u reset io to MDS\n", __func__, task->tk_pid);
1181 if (ff_layout_has_available_ds(hdr->lseg))
1182 pnfs_read_resend_pnfs(hdr);
1184 ff_layout_reset_read(hdr);
1188 hdr->pgio_done_cb = ff_layout_read_done_cb;
1194 * Call ops for the async read/write cases
1195 * In the case of dense layouts, the offset needs to be reset to its
1198 static void ff_layout_read_prepare_v3(struct rpc_task *task, void *data)
1200 struct nfs_pgio_header *hdr = data;
1202 if (ff_layout_read_prepare_common(task, hdr))
1205 rpc_call_start(task);
1208 static int ff_layout_setup_sequence(struct nfs_client *ds_clp,
1209 struct nfs4_sequence_args *args,
1210 struct nfs4_sequence_res *res,
1211 struct rpc_task *task)
1213 if (ds_clp->cl_session)
1214 return nfs41_setup_sequence(ds_clp->cl_session,
1218 return nfs40_setup_sequence(ds_clp->cl_slot_tbl,
1224 static void ff_layout_read_prepare_v4(struct rpc_task *task, void *data)
1226 struct nfs_pgio_header *hdr = data;
1228 if (ff_layout_setup_sequence(hdr->ds_clp,
1229 &hdr->args.seq_args,
1234 if (ff_layout_read_prepare_common(task, hdr))
1237 if (nfs4_set_rw_stateid(&hdr->args.stateid, hdr->args.context,
1238 hdr->args.lock_context, FMODE_READ) == -EIO)
1239 rpc_exit(task, -EIO); /* lost lock, terminate I/O */
1242 static void ff_layout_read_call_done(struct rpc_task *task, void *data)
1244 struct nfs_pgio_header *hdr = data;
1246 dprintk("--> %s task->tk_status %d\n", __func__, task->tk_status);
1248 nfs4_ff_layout_stat_io_end_read(task,
1249 FF_LAYOUT_COMP(hdr->lseg, hdr->pgio_mirror_idx),
1250 hdr->args.count, hdr->res.count);
1252 if (test_bit(NFS_IOHDR_REDO, &hdr->flags) &&
1253 task->tk_status == 0) {
1254 nfs4_sequence_done(task, &hdr->res.seq_res);
1258 /* Note this may cause RPC to be resent */
1259 hdr->mds_ops->rpc_call_done(task, hdr);
1262 static void ff_layout_read_count_stats(struct rpc_task *task, void *data)
1264 struct nfs_pgio_header *hdr = data;
1266 rpc_count_iostats_metrics(task,
1267 &NFS_CLIENT(hdr->inode)->cl_metrics[NFSPROC4_CLNT_READ]);
1270 static int ff_layout_write_done_cb(struct rpc_task *task,
1271 struct nfs_pgio_header *hdr)
1273 struct inode *inode;
1276 trace_nfs4_pnfs_write(hdr, task->tk_status);
1277 if (task->tk_status < 0)
1278 ff_layout_io_track_ds_error(hdr->lseg, hdr->pgio_mirror_idx,
1279 hdr->args.offset, hdr->args.count,
1280 hdr->res.op_status, OP_WRITE,
1282 err = ff_layout_async_handle_error(task, hdr->args.context->state,
1283 hdr->ds_clp, hdr->lseg,
1284 hdr->pgio_mirror_idx);
1287 case -NFS4ERR_RESET_TO_PNFS:
1288 case -NFS4ERR_RESET_TO_MDS:
1289 inode = hdr->lseg->pls_layout->plh_inode;
1290 pnfs_error_mark_layout_for_return(inode, hdr->lseg);
1291 if (err == -NFS4ERR_RESET_TO_PNFS) {
1292 pnfs_set_retry_layoutget(hdr->lseg->pls_layout);
1293 ff_layout_reset_write(hdr, true);
1295 pnfs_clear_retry_layoutget(hdr->lseg->pls_layout);
1296 ff_layout_reset_write(hdr, false);
1298 return task->tk_status;
1300 rpc_restart_call_prepare(task);
1304 if (hdr->res.verf->committed == NFS_FILE_SYNC ||
1305 hdr->res.verf->committed == NFS_DATA_SYNC)
1306 ff_layout_set_layoutcommit(hdr);
1308 /* zero out fattr since we don't care DS attr at all */
1309 hdr->fattr.valid = 0;
1310 if (task->tk_status >= 0)
1311 nfs_writeback_update_inode(hdr);
1316 static int ff_layout_commit_done_cb(struct rpc_task *task,
1317 struct nfs_commit_data *data)
1319 struct inode *inode;
1322 trace_nfs4_pnfs_commit_ds(data, task->tk_status);
1323 if (task->tk_status < 0)
1324 ff_layout_io_track_ds_error(data->lseg, data->ds_commit_index,
1325 data->args.offset, data->args.count,
1326 data->res.op_status, OP_COMMIT,
1328 err = ff_layout_async_handle_error(task, NULL, data->ds_clp,
1329 data->lseg, data->ds_commit_index);
1332 case -NFS4ERR_RESET_TO_PNFS:
1333 case -NFS4ERR_RESET_TO_MDS:
1334 inode = data->lseg->pls_layout->plh_inode;
1335 pnfs_error_mark_layout_for_return(inode, data->lseg);
1336 if (err == -NFS4ERR_RESET_TO_PNFS)
1337 pnfs_set_retry_layoutget(data->lseg->pls_layout);
1339 pnfs_clear_retry_layoutget(data->lseg->pls_layout);
1340 pnfs_generic_prepare_to_resend_writes(data);
1343 rpc_restart_call_prepare(task);
1347 if (data->verf.committed == NFS_UNSTABLE
1348 && ff_layout_need_layoutcommit(data->lseg))
1349 pnfs_set_layoutcommit(data->inode, data->lseg, data->lwb);
1354 static int ff_layout_write_prepare_common(struct rpc_task *task,
1355 struct nfs_pgio_header *hdr)
1357 nfs4_ff_layout_stat_io_start_write(hdr->inode,
1358 FF_LAYOUT_COMP(hdr->lseg, hdr->pgio_mirror_idx),
1362 if (unlikely(test_bit(NFS_CONTEXT_BAD, &hdr->args.context->flags))) {
1363 rpc_exit(task, -EIO);
1367 if (ff_layout_reset_to_mds(hdr->lseg, hdr->pgio_mirror_idx)) {
1370 retry_pnfs = ff_layout_has_available_ds(hdr->lseg);
1371 dprintk("%s task %u reset io to %s\n", __func__,
1372 task->tk_pid, retry_pnfs ? "pNFS" : "MDS");
1373 ff_layout_reset_write(hdr, retry_pnfs);
1381 static void ff_layout_write_prepare_v3(struct rpc_task *task, void *data)
1383 struct nfs_pgio_header *hdr = data;
1385 if (ff_layout_write_prepare_common(task, hdr))
1388 rpc_call_start(task);
1391 static void ff_layout_write_prepare_v4(struct rpc_task *task, void *data)
1393 struct nfs_pgio_header *hdr = data;
1395 if (ff_layout_setup_sequence(hdr->ds_clp,
1396 &hdr->args.seq_args,
1401 if (ff_layout_write_prepare_common(task, hdr))
1404 if (nfs4_set_rw_stateid(&hdr->args.stateid, hdr->args.context,
1405 hdr->args.lock_context, FMODE_WRITE) == -EIO)
1406 rpc_exit(task, -EIO); /* lost lock, terminate I/O */
1409 static void ff_layout_write_call_done(struct rpc_task *task, void *data)
1411 struct nfs_pgio_header *hdr = data;
1413 nfs4_ff_layout_stat_io_end_write(task,
1414 FF_LAYOUT_COMP(hdr->lseg, hdr->pgio_mirror_idx),
1415 hdr->args.count, hdr->res.count,
1416 hdr->res.verf->committed);
1418 if (test_bit(NFS_IOHDR_REDO, &hdr->flags) &&
1419 task->tk_status == 0) {
1420 nfs4_sequence_done(task, &hdr->res.seq_res);
1424 /* Note this may cause RPC to be resent */
1425 hdr->mds_ops->rpc_call_done(task, hdr);
1428 static void ff_layout_write_count_stats(struct rpc_task *task, void *data)
1430 struct nfs_pgio_header *hdr = data;
1432 rpc_count_iostats_metrics(task,
1433 &NFS_CLIENT(hdr->inode)->cl_metrics[NFSPROC4_CLNT_WRITE]);
1436 static void ff_layout_commit_prepare_common(struct rpc_task *task,
1437 struct nfs_commit_data *cdata)
1439 nfs4_ff_layout_stat_io_start_write(cdata->inode,
1440 FF_LAYOUT_COMP(cdata->lseg, cdata->ds_commit_index),
1444 static void ff_layout_commit_prepare_v3(struct rpc_task *task, void *data)
1446 ff_layout_commit_prepare_common(task, data);
1447 rpc_call_start(task);
1450 static void ff_layout_commit_prepare_v4(struct rpc_task *task, void *data)
1452 struct nfs_commit_data *wdata = data;
1454 if (ff_layout_setup_sequence(wdata->ds_clp,
1455 &wdata->args.seq_args,
1456 &wdata->res.seq_res,
1459 ff_layout_commit_prepare_common(task, data);
1462 static void ff_layout_commit_done(struct rpc_task *task, void *data)
1464 struct nfs_commit_data *cdata = data;
1465 struct nfs_page *req;
1468 if (task->tk_status == 0) {
1469 list_for_each_entry(req, &cdata->pages, wb_list)
1470 count += req->wb_bytes;
1473 nfs4_ff_layout_stat_io_end_write(task,
1474 FF_LAYOUT_COMP(cdata->lseg, cdata->ds_commit_index),
1475 count, count, NFS_FILE_SYNC);
1477 pnfs_generic_write_commit_done(task, data);
1480 static void ff_layout_commit_count_stats(struct rpc_task *task, void *data)
1482 struct nfs_commit_data *cdata = data;
1484 rpc_count_iostats_metrics(task,
1485 &NFS_CLIENT(cdata->inode)->cl_metrics[NFSPROC4_CLNT_COMMIT]);
1488 static const struct rpc_call_ops ff_layout_read_call_ops_v3 = {
1489 .rpc_call_prepare = ff_layout_read_prepare_v3,
1490 .rpc_call_done = ff_layout_read_call_done,
1491 .rpc_count_stats = ff_layout_read_count_stats,
1492 .rpc_release = pnfs_generic_rw_release,
1495 static const struct rpc_call_ops ff_layout_read_call_ops_v4 = {
1496 .rpc_call_prepare = ff_layout_read_prepare_v4,
1497 .rpc_call_done = ff_layout_read_call_done,
1498 .rpc_count_stats = ff_layout_read_count_stats,
1499 .rpc_release = pnfs_generic_rw_release,
1502 static const struct rpc_call_ops ff_layout_write_call_ops_v3 = {
1503 .rpc_call_prepare = ff_layout_write_prepare_v3,
1504 .rpc_call_done = ff_layout_write_call_done,
1505 .rpc_count_stats = ff_layout_write_count_stats,
1506 .rpc_release = pnfs_generic_rw_release,
1509 static const struct rpc_call_ops ff_layout_write_call_ops_v4 = {
1510 .rpc_call_prepare = ff_layout_write_prepare_v4,
1511 .rpc_call_done = ff_layout_write_call_done,
1512 .rpc_count_stats = ff_layout_write_count_stats,
1513 .rpc_release = pnfs_generic_rw_release,
1516 static const struct rpc_call_ops ff_layout_commit_call_ops_v3 = {
1517 .rpc_call_prepare = ff_layout_commit_prepare_v3,
1518 .rpc_call_done = ff_layout_commit_done,
1519 .rpc_count_stats = ff_layout_commit_count_stats,
1520 .rpc_release = pnfs_generic_commit_release,
1523 static const struct rpc_call_ops ff_layout_commit_call_ops_v4 = {
1524 .rpc_call_prepare = ff_layout_commit_prepare_v4,
1525 .rpc_call_done = ff_layout_commit_done,
1526 .rpc_count_stats = ff_layout_commit_count_stats,
1527 .rpc_release = pnfs_generic_commit_release,
1530 static enum pnfs_try_status
1531 ff_layout_read_pagelist(struct nfs_pgio_header *hdr)
1533 struct pnfs_layout_segment *lseg = hdr->lseg;
1534 struct nfs4_pnfs_ds *ds;
1535 struct rpc_clnt *ds_clnt;
1536 struct rpc_cred *ds_cred;
1537 loff_t offset = hdr->args.offset;
1538 u32 idx = hdr->pgio_mirror_idx;
1542 dprintk("--> %s ino %lu pgbase %u req %Zu@%llu\n",
1543 __func__, hdr->inode->i_ino,
1544 hdr->args.pgbase, (size_t)hdr->args.count, offset);
1546 ds = nfs4_ff_layout_prepare_ds(lseg, idx, false);
1550 ds_clnt = nfs4_ff_find_or_create_ds_client(lseg, idx, ds->ds_clp,
1552 if (IS_ERR(ds_clnt))
1555 ds_cred = ff_layout_get_ds_cred(lseg, idx, hdr->cred);
1556 if (IS_ERR(ds_cred))
1559 vers = nfs4_ff_layout_ds_version(lseg, idx);
1561 dprintk("%s USE DS: %s cl_count %d vers %d\n", __func__,
1562 ds->ds_remotestr, atomic_read(&ds->ds_clp->cl_count), vers);
1564 atomic_inc(&ds->ds_clp->cl_count);
1565 hdr->ds_clp = ds->ds_clp;
1566 fh = nfs4_ff_layout_select_ds_fh(lseg, idx);
1570 * Note that if we ever decide to split across DSes,
1571 * then we may need to handle dense-like offsets.
1573 hdr->args.offset = offset;
1574 hdr->mds_offset = offset;
1576 /* Perform an asynchronous read to ds */
1577 nfs_initiate_pgio(ds_clnt, hdr, ds_cred, ds->ds_clp->rpc_ops,
1578 vers == 3 ? &ff_layout_read_call_ops_v3 :
1579 &ff_layout_read_call_ops_v4,
1580 0, RPC_TASK_SOFTCONN);
1582 return PNFS_ATTEMPTED;
1585 if (ff_layout_has_available_ds(lseg))
1586 return PNFS_TRY_AGAIN;
1587 return PNFS_NOT_ATTEMPTED;
1590 /* Perform async writes. */
1591 static enum pnfs_try_status
1592 ff_layout_write_pagelist(struct nfs_pgio_header *hdr, int sync)
1594 struct pnfs_layout_segment *lseg = hdr->lseg;
1595 struct nfs4_pnfs_ds *ds;
1596 struct rpc_clnt *ds_clnt;
1597 struct rpc_cred *ds_cred;
1598 loff_t offset = hdr->args.offset;
1601 int idx = hdr->pgio_mirror_idx;
1603 ds = nfs4_ff_layout_prepare_ds(lseg, idx, true);
1605 return PNFS_NOT_ATTEMPTED;
1607 ds_clnt = nfs4_ff_find_or_create_ds_client(lseg, idx, ds->ds_clp,
1609 if (IS_ERR(ds_clnt))
1610 return PNFS_NOT_ATTEMPTED;
1612 ds_cred = ff_layout_get_ds_cred(lseg, idx, hdr->cred);
1613 if (IS_ERR(ds_cred))
1614 return PNFS_NOT_ATTEMPTED;
1616 vers = nfs4_ff_layout_ds_version(lseg, idx);
1618 dprintk("%s ino %lu sync %d req %Zu@%llu DS: %s cl_count %d vers %d\n",
1619 __func__, hdr->inode->i_ino, sync, (size_t) hdr->args.count,
1620 offset, ds->ds_remotestr, atomic_read(&ds->ds_clp->cl_count),
1623 hdr->pgio_done_cb = ff_layout_write_done_cb;
1624 atomic_inc(&ds->ds_clp->cl_count);
1625 hdr->ds_clp = ds->ds_clp;
1626 hdr->ds_commit_idx = idx;
1627 fh = nfs4_ff_layout_select_ds_fh(lseg, idx);
1632 * Note that if we ever decide to split across DSes,
1633 * then we may need to handle dense-like offsets.
1635 hdr->args.offset = offset;
1637 /* Perform an asynchronous write */
1638 nfs_initiate_pgio(ds_clnt, hdr, ds_cred, ds->ds_clp->rpc_ops,
1639 vers == 3 ? &ff_layout_write_call_ops_v3 :
1640 &ff_layout_write_call_ops_v4,
1641 sync, RPC_TASK_SOFTCONN);
1642 return PNFS_ATTEMPTED;
1645 static u32 calc_ds_index_from_commit(struct pnfs_layout_segment *lseg, u32 i)
1650 static struct nfs_fh *
1651 select_ds_fh_from_commit(struct pnfs_layout_segment *lseg, u32 i)
1653 struct nfs4_ff_layout_segment *flseg = FF_LAYOUT_LSEG(lseg);
1655 /* FIXME: Assume that there is only one NFS version available
1658 return &flseg->mirror_array[i]->fh_versions[0];
1661 static int ff_layout_initiate_commit(struct nfs_commit_data *data, int how)
1663 struct pnfs_layout_segment *lseg = data->lseg;
1664 struct nfs4_pnfs_ds *ds;
1665 struct rpc_clnt *ds_clnt;
1666 struct rpc_cred *ds_cred;
1671 idx = calc_ds_index_from_commit(lseg, data->ds_commit_index);
1672 ds = nfs4_ff_layout_prepare_ds(lseg, idx, true);
1676 ds_clnt = nfs4_ff_find_or_create_ds_client(lseg, idx, ds->ds_clp,
1678 if (IS_ERR(ds_clnt))
1681 ds_cred = ff_layout_get_ds_cred(lseg, idx, data->cred);
1682 if (IS_ERR(ds_cred))
1685 vers = nfs4_ff_layout_ds_version(lseg, idx);
1687 dprintk("%s ino %lu, how %d cl_count %d vers %d\n", __func__,
1688 data->inode->i_ino, how, atomic_read(&ds->ds_clp->cl_count),
1690 data->commit_done_cb = ff_layout_commit_done_cb;
1691 data->cred = ds_cred;
1692 atomic_inc(&ds->ds_clp->cl_count);
1693 data->ds_clp = ds->ds_clp;
1694 fh = select_ds_fh_from_commit(lseg, data->ds_commit_index);
1698 return nfs_initiate_commit(ds_clnt, data, ds->ds_clp->rpc_ops,
1699 vers == 3 ? &ff_layout_commit_call_ops_v3 :
1700 &ff_layout_commit_call_ops_v4,
1701 how, RPC_TASK_SOFTCONN);
1703 pnfs_generic_prepare_to_resend_writes(data);
1704 pnfs_generic_commit_release(data);
1709 ff_layout_commit_pagelist(struct inode *inode, struct list_head *mds_pages,
1710 int how, struct nfs_commit_info *cinfo)
1712 return pnfs_generic_commit_pagelist(inode, mds_pages, how, cinfo,
1713 ff_layout_initiate_commit);
1716 static struct pnfs_ds_commit_info *
1717 ff_layout_get_ds_info(struct inode *inode)
1719 struct pnfs_layout_hdr *layout = NFS_I(inode)->layout;
1724 return &FF_LAYOUT_FROM_HDR(layout)->commit_info;
1728 ff_layout_free_deviceid_node(struct nfs4_deviceid_node *d)
1730 nfs4_ff_layout_free_deviceid(container_of(d, struct nfs4_ff_layout_ds,
1734 static int ff_layout_encode_ioerr(struct nfs4_flexfile_layout *flo,
1735 struct xdr_stream *xdr,
1736 const struct nfs4_layoutreturn_args *args)
1738 struct pnfs_layout_hdr *hdr = &flo->generic_hdr;
1740 int count = 0, ret = 0;
1742 start = xdr_reserve_space(xdr, 4);
1743 if (unlikely(!start))
1746 /* This assume we always return _ALL_ layouts */
1747 spin_lock(&hdr->plh_inode->i_lock);
1748 ret = ff_layout_encode_ds_ioerr(flo, xdr, &count, &args->range);
1749 spin_unlock(&hdr->plh_inode->i_lock);
1751 *start = cpu_to_be32(count);
1756 /* report nothing for now */
1757 static void ff_layout_encode_iostats(struct nfs4_flexfile_layout *flo,
1758 struct xdr_stream *xdr,
1759 const struct nfs4_layoutreturn_args *args)
1763 p = xdr_reserve_space(xdr, 4);
1765 *p = cpu_to_be32(0);
1768 static struct nfs4_deviceid_node *
1769 ff_layout_alloc_deviceid_node(struct nfs_server *server,
1770 struct pnfs_device *pdev, gfp_t gfp_flags)
1772 struct nfs4_ff_layout_ds *dsaddr;
1774 dsaddr = nfs4_ff_alloc_deviceid_node(server, pdev, gfp_flags);
1777 return &dsaddr->id_node;
1781 ff_layout_encode_layoutreturn(struct pnfs_layout_hdr *lo,
1782 struct xdr_stream *xdr,
1783 const struct nfs4_layoutreturn_args *args)
1785 struct nfs4_flexfile_layout *flo = FF_LAYOUT_FROM_HDR(lo);
1788 dprintk("%s: Begin\n", __func__);
1789 start = xdr_reserve_space(xdr, 4);
1792 if (ff_layout_encode_ioerr(flo, xdr, args))
1795 ff_layout_encode_iostats(flo, xdr, args);
1797 *start = cpu_to_be32((xdr->p - start - 1) * 4);
1798 dprintk("%s: Return\n", __func__);
1802 ff_layout_ntop4(const struct sockaddr *sap, char *buf, const size_t buflen)
1804 const struct sockaddr_in *sin = (struct sockaddr_in *)sap;
1806 return snprintf(buf, buflen, "%pI4", &sin->sin_addr);
1810 ff_layout_ntop6_noscopeid(const struct sockaddr *sap, char *buf,
1813 const struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)sap;
1814 const struct in6_addr *addr = &sin6->sin6_addr;
1817 * RFC 4291, Section 2.2.2
1819 * Shorthanded ANY address
1821 if (ipv6_addr_any(addr))
1822 return snprintf(buf, buflen, "::");
1825 * RFC 4291, Section 2.2.2
1827 * Shorthanded loopback address
1829 if (ipv6_addr_loopback(addr))
1830 return snprintf(buf, buflen, "::1");
1833 * RFC 4291, Section 2.2.3
1835 * Special presentation address format for mapped v4
1838 if (ipv6_addr_v4mapped(addr))
1839 return snprintf(buf, buflen, "::ffff:%pI4",
1840 &addr->s6_addr32[3]);
1843 * RFC 4291, Section 2.2.1
1845 return snprintf(buf, buflen, "%pI6c", addr);
1848 /* Derived from rpc_sockaddr2uaddr */
1850 ff_layout_encode_netaddr(struct xdr_stream *xdr, struct nfs4_pnfs_ds_addr *da)
1852 struct sockaddr *sap = (struct sockaddr *)&da->da_addr;
1853 char portbuf[RPCBIND_MAXUADDRPLEN];
1854 char addrbuf[RPCBIND_MAXUADDRLEN];
1856 unsigned short port;
1860 switch (sap->sa_family) {
1862 if (ff_layout_ntop4(sap, addrbuf, sizeof(addrbuf)) == 0)
1864 port = ntohs(((struct sockaddr_in *)sap)->sin_port);
1869 if (ff_layout_ntop6_noscopeid(sap, addrbuf, sizeof(addrbuf)) == 0)
1871 port = ntohs(((struct sockaddr_in6 *)sap)->sin6_port);
1876 /* we only support tcp and tcp6 */
1881 snprintf(portbuf, sizeof(portbuf), ".%u.%u", port >> 8, port & 0xff);
1882 len = strlcat(addrbuf, portbuf, sizeof(addrbuf));
1884 p = xdr_reserve_space(xdr, 4 + netid_len);
1885 xdr_encode_opaque(p, netid, netid_len);
1887 p = xdr_reserve_space(xdr, 4 + len);
1888 xdr_encode_opaque(p, addrbuf, len);
1892 ff_layout_encode_nfstime(struct xdr_stream *xdr,
1895 struct timespec64 ts;
1898 p = xdr_reserve_space(xdr, 12);
1899 ts = ktime_to_timespec64(t);
1900 p = xdr_encode_hyper(p, ts.tv_sec);
1901 *p++ = cpu_to_be32(ts.tv_nsec);
1905 ff_layout_encode_io_latency(struct xdr_stream *xdr,
1906 struct nfs4_ff_io_stat *stat)
1910 p = xdr_reserve_space(xdr, 5 * 8);
1911 p = xdr_encode_hyper(p, stat->ops_requested);
1912 p = xdr_encode_hyper(p, stat->bytes_requested);
1913 p = xdr_encode_hyper(p, stat->ops_completed);
1914 p = xdr_encode_hyper(p, stat->bytes_completed);
1915 p = xdr_encode_hyper(p, stat->bytes_not_delivered);
1916 ff_layout_encode_nfstime(xdr, stat->total_busy_time);
1917 ff_layout_encode_nfstime(xdr, stat->aggregate_completion_time);
1921 ff_layout_encode_layoutstats(struct xdr_stream *xdr,
1922 struct nfs42_layoutstat_args *args,
1923 struct nfs42_layoutstat_devinfo *devinfo)
1925 struct nfs4_ff_layout_mirror *mirror = devinfo->layout_private;
1926 struct nfs4_pnfs_ds_addr *da;
1927 struct nfs4_pnfs_ds *ds = mirror->mirror_ds->ds;
1928 struct nfs_fh *fh = &mirror->fh_versions[0];
1931 da = list_first_entry(&ds->ds_addrs, struct nfs4_pnfs_ds_addr, da_node);
1932 dprintk("%s: DS %s: encoding address %s\n",
1933 __func__, ds->ds_remotestr, da->da_remotestr);
1934 /* layoutupdate length */
1935 start = xdr_reserve_space(xdr, 4);
1937 ff_layout_encode_netaddr(xdr, da);
1939 p = xdr_reserve_space(xdr, 4 + fh->size);
1940 xdr_encode_opaque(p, fh->data, fh->size);
1941 /* ff_io_latency4 read */
1942 spin_lock(&mirror->lock);
1943 ff_layout_encode_io_latency(xdr, &mirror->read_stat.io_stat);
1944 /* ff_io_latency4 write */
1945 ff_layout_encode_io_latency(xdr, &mirror->write_stat.io_stat);
1946 spin_unlock(&mirror->lock);
1948 ff_layout_encode_nfstime(xdr, ktime_sub(ktime_get(), mirror->start_time));
1950 p = xdr_reserve_space(xdr, 4);
1951 *p = cpu_to_be32(false);
1953 *start = cpu_to_be32((xdr->p - start - 1) * 4);
1957 ff_layout_mirror_prepare_stats(struct nfs42_layoutstat_args *args,
1958 struct pnfs_layout_hdr *lo,
1961 struct nfs4_flexfile_layout *ff_layout = FF_LAYOUT_FROM_HDR(lo);
1962 struct nfs4_ff_layout_mirror *mirror;
1963 struct nfs4_deviceid_node *dev;
1964 struct nfs42_layoutstat_devinfo *devinfo;
1967 list_for_each_entry(mirror, &ff_layout->mirrors, mirrors) {
1970 if (!mirror->mirror_ds)
1972 /* mirror refcount put in cleanup_layoutstats */
1973 if (!atomic_inc_not_zero(&mirror->ref))
1975 dev = &mirror->mirror_ds->id_node;
1976 devinfo = &args->devinfo[i];
1977 memcpy(&devinfo->dev_id, &dev->deviceid, NFS4_DEVICEID4_SIZE);
1978 devinfo->offset = 0;
1979 devinfo->length = NFS4_MAX_UINT64;
1980 devinfo->read_count = mirror->read_stat.io_stat.ops_completed;
1981 devinfo->read_bytes = mirror->read_stat.io_stat.bytes_completed;
1982 devinfo->write_count = mirror->write_stat.io_stat.ops_completed;
1983 devinfo->write_bytes = mirror->write_stat.io_stat.bytes_completed;
1984 devinfo->layout_type = LAYOUT_FLEX_FILES;
1985 devinfo->layoutstats_encode = ff_layout_encode_layoutstats;
1986 devinfo->layout_private = mirror;
1994 ff_layout_prepare_layoutstats(struct nfs42_layoutstat_args *args)
1996 struct nfs4_flexfile_layout *ff_layout;
1997 struct nfs4_ff_layout_mirror *mirror;
2000 spin_lock(&args->inode->i_lock);
2001 ff_layout = FF_LAYOUT_FROM_HDR(NFS_I(args->inode)->layout);
2002 list_for_each_entry(mirror, &ff_layout->mirrors, mirrors) {
2003 if (atomic_read(&mirror->ref) != 0)
2006 spin_unlock(&args->inode->i_lock);
2007 /* For now, send at most PNFS_LAYOUTSTATS_MAXDEV statistics */
2008 if (dev_count > PNFS_LAYOUTSTATS_MAXDEV) {
2009 dprintk("%s: truncating devinfo to limit (%d:%d)\n",
2010 __func__, dev_count, PNFS_LAYOUTSTATS_MAXDEV);
2011 dev_count = PNFS_LAYOUTSTATS_MAXDEV;
2013 args->devinfo = kmalloc_array(dev_count, sizeof(*args->devinfo), GFP_NOIO);
2017 spin_lock(&args->inode->i_lock);
2018 args->num_dev = ff_layout_mirror_prepare_stats(args,
2019 &ff_layout->generic_hdr, dev_count);
2020 spin_unlock(&args->inode->i_lock);
2026 ff_layout_cleanup_layoutstats(struct nfs42_layoutstat_data *data)
2028 struct nfs4_ff_layout_mirror *mirror;
2031 for (i = 0; i < data->args.num_dev; i++) {
2032 mirror = data->args.devinfo[i].layout_private;
2033 data->args.devinfo[i].layout_private = NULL;
2034 ff_layout_put_mirror(mirror);
2038 static struct pnfs_layoutdriver_type flexfilelayout_type = {
2039 .id = LAYOUT_FLEX_FILES,
2040 .name = "LAYOUT_FLEX_FILES",
2041 .owner = THIS_MODULE,
2042 .alloc_layout_hdr = ff_layout_alloc_layout_hdr,
2043 .free_layout_hdr = ff_layout_free_layout_hdr,
2044 .alloc_lseg = ff_layout_alloc_lseg,
2045 .free_lseg = ff_layout_free_lseg,
2046 .pg_read_ops = &ff_layout_pg_read_ops,
2047 .pg_write_ops = &ff_layout_pg_write_ops,
2048 .get_ds_info = ff_layout_get_ds_info,
2049 .free_deviceid_node = ff_layout_free_deviceid_node,
2050 .mark_request_commit = pnfs_layout_mark_request_commit,
2051 .clear_request_commit = pnfs_generic_clear_request_commit,
2052 .scan_commit_lists = pnfs_generic_scan_commit_lists,
2053 .recover_commit_reqs = pnfs_generic_recover_commit_reqs,
2054 .commit_pagelist = ff_layout_commit_pagelist,
2055 .read_pagelist = ff_layout_read_pagelist,
2056 .write_pagelist = ff_layout_write_pagelist,
2057 .alloc_deviceid_node = ff_layout_alloc_deviceid_node,
2058 .encode_layoutreturn = ff_layout_encode_layoutreturn,
2059 .sync = pnfs_nfs_generic_sync,
2060 .prepare_layoutstats = ff_layout_prepare_layoutstats,
2061 .cleanup_layoutstats = ff_layout_cleanup_layoutstats,
2064 static int __init nfs4flexfilelayout_init(void)
2066 printk(KERN_INFO "%s: NFSv4 Flexfile Layout Driver Registering...\n",
2068 return pnfs_register_layoutdriver(&flexfilelayout_type);
2071 static void __exit nfs4flexfilelayout_exit(void)
2073 printk(KERN_INFO "%s: NFSv4 Flexfile Layout Driver Unregistering...\n",
2075 pnfs_unregister_layoutdriver(&flexfilelayout_type);
2078 MODULE_ALIAS("nfs-layouttype4-4");
2080 MODULE_LICENSE("GPL");
2081 MODULE_DESCRIPTION("The NFSv4 flexfile layout driver");
2083 module_init(nfs4flexfilelayout_init);
2084 module_exit(nfs4flexfilelayout_exit);