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 group_info
*ff_zero_group
;
31 static struct pnfs_layout_hdr
*
32 ff_layout_alloc_layout_hdr(struct inode
*inode
, gfp_t gfp_flags
)
34 struct nfs4_flexfile_layout
*ffl
;
36 ffl
= kzalloc(sizeof(*ffl
), gfp_flags
);
38 INIT_LIST_HEAD(&ffl
->error_list
);
39 INIT_LIST_HEAD(&ffl
->mirrors
);
40 return &ffl
->generic_hdr
;
46 ff_layout_free_layout_hdr(struct pnfs_layout_hdr
*lo
)
48 struct nfs4_ff_layout_ds_err
*err
, *n
;
50 list_for_each_entry_safe(err
, n
, &FF_LAYOUT_FROM_HDR(lo
)->error_list
,
55 kfree(FF_LAYOUT_FROM_HDR(lo
));
58 static int decode_pnfs_stateid(struct xdr_stream
*xdr
, nfs4_stateid
*stateid
)
62 p
= xdr_inline_decode(xdr
, NFS4_STATEID_SIZE
);
63 if (unlikely(p
== NULL
))
65 stateid
->type
= NFS4_PNFS_DS_STATEID_TYPE
;
66 memcpy(stateid
->data
, p
, NFS4_STATEID_SIZE
);
67 dprintk("%s: stateid id= [%x%x%x%x]\n", __func__
,
68 p
[0], p
[1], p
[2], p
[3]);
72 static int decode_deviceid(struct xdr_stream
*xdr
, struct nfs4_deviceid
*devid
)
76 p
= xdr_inline_decode(xdr
, NFS4_DEVICEID4_SIZE
);
79 memcpy(devid
, p
, NFS4_DEVICEID4_SIZE
);
80 nfs4_print_deviceid(devid
);
84 static int decode_nfs_fh(struct xdr_stream
*xdr
, struct nfs_fh
*fh
)
88 p
= xdr_inline_decode(xdr
, 4);
91 fh
->size
= be32_to_cpup(p
++);
92 if (fh
->size
> sizeof(struct nfs_fh
)) {
93 printk(KERN_ERR
"NFS flexfiles: Too big fh received %d\n",
98 p
= xdr_inline_decode(xdr
, fh
->size
);
101 memcpy(&fh
->data
, p
, fh
->size
);
102 dprintk("%s: fh len %d\n", __func__
, fh
->size
);
108 * Currently only stringified uids and gids are accepted.
109 * I.e., kerberos is not supported to the DSes, so no pricipals.
111 * That means that one common function will suffice, but when
112 * principals are added, this should be split to accomodate
113 * calls to both nfs_map_name_to_uid() and nfs_map_group_to_gid().
116 decode_name(struct xdr_stream
*xdr
, u32
*id
)
121 /* opaque_length(4)*/
122 p
= xdr_inline_decode(xdr
, 4);
125 len
= be32_to_cpup(p
++);
129 dprintk("%s: len %u\n", __func__
, len
);
132 p
= xdr_inline_decode(xdr
, len
);
136 if (!nfs_map_string_to_numeric((char *)p
, len
, id
))
142 static bool ff_mirror_match_fh(const struct nfs4_ff_layout_mirror
*m1
,
143 const struct nfs4_ff_layout_mirror
*m2
)
147 if (m1
->fh_versions_cnt
!= m2
->fh_versions_cnt
)
149 for (i
= 0; i
< m1
->fh_versions_cnt
; i
++) {
150 bool found_fh
= false;
151 for (j
= 0; j
< m2
->fh_versions_cnt
; j
++) {
152 if (nfs_compare_fh(&m1
->fh_versions
[i
],
153 &m2
->fh_versions
[j
]) == 0) {
164 static struct nfs4_ff_layout_mirror
*
165 ff_layout_add_mirror(struct pnfs_layout_hdr
*lo
,
166 struct nfs4_ff_layout_mirror
*mirror
)
168 struct nfs4_flexfile_layout
*ff_layout
= FF_LAYOUT_FROM_HDR(lo
);
169 struct nfs4_ff_layout_mirror
*pos
;
170 struct inode
*inode
= lo
->plh_inode
;
172 spin_lock(&inode
->i_lock
);
173 list_for_each_entry(pos
, &ff_layout
->mirrors
, mirrors
) {
174 if (mirror
->mirror_ds
!= pos
->mirror_ds
)
176 if (!ff_mirror_match_fh(mirror
, pos
))
178 if (atomic_inc_not_zero(&pos
->ref
)) {
179 spin_unlock(&inode
->i_lock
);
183 list_add(&mirror
->mirrors
, &ff_layout
->mirrors
);
185 spin_unlock(&inode
->i_lock
);
190 ff_layout_remove_mirror(struct nfs4_ff_layout_mirror
*mirror
)
193 if (mirror
->layout
== NULL
)
195 inode
= mirror
->layout
->plh_inode
;
196 spin_lock(&inode
->i_lock
);
197 list_del(&mirror
->mirrors
);
198 spin_unlock(&inode
->i_lock
);
199 mirror
->layout
= NULL
;
202 static struct nfs4_ff_layout_mirror
*ff_layout_alloc_mirror(gfp_t gfp_flags
)
204 struct nfs4_ff_layout_mirror
*mirror
;
206 mirror
= kzalloc(sizeof(*mirror
), gfp_flags
);
207 if (mirror
!= NULL
) {
208 spin_lock_init(&mirror
->lock
);
209 atomic_set(&mirror
->ref
, 1);
210 INIT_LIST_HEAD(&mirror
->mirrors
);
215 static void ff_layout_free_mirror(struct nfs4_ff_layout_mirror
*mirror
)
217 struct rpc_cred
*cred
;
219 ff_layout_remove_mirror(mirror
);
220 kfree(mirror
->fh_versions
);
221 cred
= rcu_access_pointer(mirror
->ro_cred
);
224 cred
= rcu_access_pointer(mirror
->rw_cred
);
227 nfs4_ff_layout_put_deviceid(mirror
->mirror_ds
);
231 static void ff_layout_put_mirror(struct nfs4_ff_layout_mirror
*mirror
)
233 if (mirror
!= NULL
&& atomic_dec_and_test(&mirror
->ref
))
234 ff_layout_free_mirror(mirror
);
237 static void ff_layout_free_mirror_array(struct nfs4_ff_layout_segment
*fls
)
241 if (fls
->mirror_array
) {
242 for (i
= 0; i
< fls
->mirror_array_cnt
; i
++) {
243 /* normally mirror_ds is freed in
244 * .free_deviceid_node but we still do it here
245 * for .alloc_lseg error path */
246 ff_layout_put_mirror(fls
->mirror_array
[i
]);
248 kfree(fls
->mirror_array
);
249 fls
->mirror_array
= NULL
;
253 static int ff_layout_check_layout(struct nfs4_layoutget_res
*lgr
)
257 dprintk("--> %s\n", __func__
);
259 /* FIXME: remove this check when layout segment support is added */
260 if (lgr
->range
.offset
!= 0 ||
261 lgr
->range
.length
!= NFS4_MAX_UINT64
) {
262 dprintk("%s Only whole file layouts supported. Use MDS i/o\n",
267 dprintk("--> %s returns %d\n", __func__
, ret
);
271 static void _ff_layout_free_lseg(struct nfs4_ff_layout_segment
*fls
)
274 ff_layout_free_mirror_array(fls
);
280 ff_lseg_range_is_after(const struct pnfs_layout_range
*l1
,
281 const struct pnfs_layout_range
*l2
)
285 if (l1
->iomode
!= l2
->iomode
)
286 return l1
->iomode
!= IOMODE_READ
;
287 end1
= pnfs_calc_offset_end(l1
->offset
, l1
->length
);
288 end2
= pnfs_calc_offset_end(l2
->offset
, l2
->length
);
289 if (end1
< l2
->offset
)
291 if (end2
< l1
->offset
)
293 return l2
->offset
<= l1
->offset
;
297 ff_lseg_merge(struct pnfs_layout_segment
*new,
298 struct pnfs_layout_segment
*old
)
300 u64 new_end
, old_end
;
302 if (test_bit(NFS_LSEG_LAYOUTRETURN
, &old
->pls_flags
))
304 if (new->pls_range
.iomode
!= old
->pls_range
.iomode
)
306 old_end
= pnfs_calc_offset_end(old
->pls_range
.offset
,
307 old
->pls_range
.length
);
308 if (old_end
< new->pls_range
.offset
)
310 new_end
= pnfs_calc_offset_end(new->pls_range
.offset
,
311 new->pls_range
.length
);
312 if (new_end
< old
->pls_range
.offset
)
315 /* Mergeable: copy info from 'old' to 'new' */
316 if (new_end
< old_end
)
318 if (new->pls_range
.offset
< old
->pls_range
.offset
)
319 new->pls_range
.offset
= old
->pls_range
.offset
;
320 new->pls_range
.length
= pnfs_calc_offset_length(new->pls_range
.offset
,
322 if (test_bit(NFS_LSEG_ROC
, &old
->pls_flags
))
323 set_bit(NFS_LSEG_ROC
, &new->pls_flags
);
328 ff_layout_add_lseg(struct pnfs_layout_hdr
*lo
,
329 struct pnfs_layout_segment
*lseg
,
330 struct list_head
*free_me
)
332 pnfs_generic_layout_insert_lseg(lo
, lseg
,
333 ff_lseg_range_is_after
,
338 static void ff_layout_sort_mirrors(struct nfs4_ff_layout_segment
*fls
)
342 for (i
= 0; i
< fls
->mirror_array_cnt
- 1; i
++) {
343 for (j
= i
+ 1; j
< fls
->mirror_array_cnt
; j
++)
344 if (fls
->mirror_array
[i
]->efficiency
<
345 fls
->mirror_array
[j
]->efficiency
)
346 swap(fls
->mirror_array
[i
],
347 fls
->mirror_array
[j
]);
351 static void ff_layout_mark_devices_valid(struct nfs4_ff_layout_segment
*fls
)
353 struct nfs4_deviceid_node
*node
;
356 if (!(fls
->flags
& FF_FLAGS_NO_IO_THRU_MDS
))
358 for (i
= 0; i
< fls
->mirror_array_cnt
; i
++) {
359 node
= &fls
->mirror_array
[i
]->mirror_ds
->id_node
;
360 clear_bit(NFS_DEVICEID_UNAVAILABLE
, &node
->flags
);
364 static struct pnfs_layout_segment
*
365 ff_layout_alloc_lseg(struct pnfs_layout_hdr
*lh
,
366 struct nfs4_layoutget_res
*lgr
,
369 struct pnfs_layout_segment
*ret
;
370 struct nfs4_ff_layout_segment
*fls
= NULL
;
371 struct xdr_stream stream
;
373 struct page
*scratch
;
375 u32 mirror_array_cnt
;
379 dprintk("--> %s\n", __func__
);
380 scratch
= alloc_page(gfp_flags
);
382 return ERR_PTR(-ENOMEM
);
384 xdr_init_decode_pages(&stream
, &buf
, lgr
->layoutp
->pages
,
386 xdr_set_scratch_buffer(&stream
, page_address(scratch
), PAGE_SIZE
);
388 /* stripe unit and mirror_array_cnt */
390 p
= xdr_inline_decode(&stream
, 8 + 4);
394 p
= xdr_decode_hyper(p
, &stripe_unit
);
395 mirror_array_cnt
= be32_to_cpup(p
++);
396 dprintk("%s: stripe_unit=%llu mirror_array_cnt=%u\n", __func__
,
397 stripe_unit
, mirror_array_cnt
);
399 if (mirror_array_cnt
> NFS4_FLEXFILE_LAYOUT_MAX_MIRROR_CNT
||
400 mirror_array_cnt
== 0)
404 fls
= kzalloc(sizeof(*fls
), gfp_flags
);
408 fls
->mirror_array_cnt
= mirror_array_cnt
;
409 fls
->stripe_unit
= stripe_unit
;
410 fls
->mirror_array
= kcalloc(fls
->mirror_array_cnt
,
411 sizeof(fls
->mirror_array
[0]), gfp_flags
);
412 if (fls
->mirror_array
== NULL
)
415 for (i
= 0; i
< fls
->mirror_array_cnt
; i
++) {
416 struct nfs4_ff_layout_mirror
*mirror
;
417 struct nfs4_deviceid devid
;
418 struct nfs4_deviceid_node
*idnode
;
419 struct auth_cred acred
= { .group_info
= ff_zero_group
};
420 struct rpc_cred __rcu
*cred
;
421 u32 ds_count
, fh_count
, id
;
425 p
= xdr_inline_decode(&stream
, 4);
428 ds_count
= be32_to_cpup(p
);
430 /* FIXME: allow for striping? */
434 fls
->mirror_array
[i
] = ff_layout_alloc_mirror(gfp_flags
);
435 if (fls
->mirror_array
[i
] == NULL
) {
440 fls
->mirror_array
[i
]->ds_count
= ds_count
;
443 rc
= decode_deviceid(&stream
, &devid
);
447 idnode
= nfs4_find_get_deviceid(NFS_SERVER(lh
->plh_inode
),
448 &devid
, lh
->plh_lc_cred
,
451 * upon success, mirror_ds is allocated by previous
452 * getdeviceinfo, or newly by .alloc_deviceid_node
453 * nfs4_find_get_deviceid failure is indeed getdeviceinfo falure
456 fls
->mirror_array
[i
]->mirror_ds
=
457 FF_LAYOUT_MIRROR_DS(idnode
);
463 p
= xdr_inline_decode(&stream
, 4);
466 fls
->mirror_array
[i
]->efficiency
= be32_to_cpup(p
);
469 rc
= decode_pnfs_stateid(&stream
, &fls
->mirror_array
[i
]->stateid
);
474 p
= xdr_inline_decode(&stream
, 4);
477 fh_count
= be32_to_cpup(p
);
479 fls
->mirror_array
[i
]->fh_versions
=
480 kzalloc(fh_count
* sizeof(struct nfs_fh
),
482 if (fls
->mirror_array
[i
]->fh_versions
== NULL
) {
487 for (j
= 0; j
< fh_count
; j
++) {
488 rc
= decode_nfs_fh(&stream
,
489 &fls
->mirror_array
[i
]->fh_versions
[j
]);
494 fls
->mirror_array
[i
]->fh_versions_cnt
= fh_count
;
497 rc
= decode_name(&stream
, &id
);
501 acred
.uid
= make_kuid(&init_user_ns
, id
);
504 rc
= decode_name(&stream
, &id
);
508 acred
.gid
= make_kgid(&init_user_ns
, id
);
510 /* find the cred for it */
511 rcu_assign_pointer(cred
, rpc_lookup_generic_cred(&acred
, 0, gfp_flags
));
517 if (lgr
->range
.iomode
== IOMODE_READ
)
518 rcu_assign_pointer(fls
->mirror_array
[i
]->ro_cred
, cred
);
520 rcu_assign_pointer(fls
->mirror_array
[i
]->rw_cred
, cred
);
522 mirror
= ff_layout_add_mirror(lh
, fls
->mirror_array
[i
]);
523 if (mirror
!= fls
->mirror_array
[i
]) {
524 /* swap cred ptrs so free_mirror will clean up old */
525 if (lgr
->range
.iomode
== IOMODE_READ
) {
526 cred
= xchg(&mirror
->ro_cred
, cred
);
527 rcu_assign_pointer(fls
->mirror_array
[i
]->ro_cred
, cred
);
529 cred
= xchg(&mirror
->rw_cred
, cred
);
530 rcu_assign_pointer(fls
->mirror_array
[i
]->rw_cred
, cred
);
532 ff_layout_free_mirror(fls
->mirror_array
[i
]);
533 fls
->mirror_array
[i
] = mirror
;
536 dprintk("%s: iomode %s uid %u gid %u\n", __func__
,
537 lgr
->range
.iomode
== IOMODE_READ
? "READ" : "RW",
538 from_kuid(&init_user_ns
, acred
.uid
),
539 from_kgid(&init_user_ns
, acred
.gid
));
542 p
= xdr_inline_decode(&stream
, 4);
544 goto out_sort_mirrors
;
545 fls
->flags
= be32_to_cpup(p
);
547 p
= xdr_inline_decode(&stream
, 4);
549 goto out_sort_mirrors
;
550 for (i
=0; i
< fls
->mirror_array_cnt
; i
++)
551 fls
->mirror_array
[i
]->report_interval
= be32_to_cpup(p
);
554 ff_layout_sort_mirrors(fls
);
555 rc
= ff_layout_check_layout(lgr
);
558 ff_layout_mark_devices_valid(fls
);
560 ret
= &fls
->generic_hdr
;
561 dprintk("<-- %s (success)\n", __func__
);
563 __free_page(scratch
);
566 _ff_layout_free_lseg(fls
);
568 dprintk("<-- %s (%d)\n", __func__
, rc
);
572 static bool ff_layout_has_rw_segments(struct pnfs_layout_hdr
*layout
)
574 struct pnfs_layout_segment
*lseg
;
576 list_for_each_entry(lseg
, &layout
->plh_segs
, pls_list
)
577 if (lseg
->pls_range
.iomode
== IOMODE_RW
)
584 ff_layout_free_lseg(struct pnfs_layout_segment
*lseg
)
586 struct nfs4_ff_layout_segment
*fls
= FF_LAYOUT_LSEG(lseg
);
588 dprintk("--> %s\n", __func__
);
590 if (lseg
->pls_range
.iomode
== IOMODE_RW
) {
591 struct nfs4_flexfile_layout
*ffl
;
594 ffl
= FF_LAYOUT_FROM_HDR(lseg
->pls_layout
);
595 inode
= ffl
->generic_hdr
.plh_inode
;
596 spin_lock(&inode
->i_lock
);
597 if (!ff_layout_has_rw_segments(lseg
->pls_layout
)) {
598 ffl
->commit_info
.nbuckets
= 0;
599 kfree(ffl
->commit_info
.buckets
);
600 ffl
->commit_info
.buckets
= NULL
;
602 spin_unlock(&inode
->i_lock
);
604 _ff_layout_free_lseg(fls
);
607 /* Return 1 until we have multiple lsegs support */
609 ff_layout_get_lseg_count(struct nfs4_ff_layout_segment
*fls
)
615 nfs4_ff_start_busy_timer(struct nfs4_ff_busy_timer
*timer
, ktime_t now
)
617 /* first IO request? */
618 if (atomic_inc_return(&timer
->n_ops
) == 1) {
619 timer
->start_time
= now
;
624 nfs4_ff_end_busy_timer(struct nfs4_ff_busy_timer
*timer
, ktime_t now
)
628 if (atomic_dec_return(&timer
->n_ops
) < 0)
631 start
= timer
->start_time
;
632 timer
->start_time
= now
;
633 return ktime_sub(now
, start
);
637 nfs4_ff_layoutstat_start_io(struct nfs4_ff_layout_mirror
*mirror
,
638 struct nfs4_ff_layoutstat
*layoutstat
,
641 static const ktime_t notime
= {0};
642 s64 report_interval
= FF_LAYOUTSTATS_REPORT_INTERVAL
;
644 nfs4_ff_start_busy_timer(&layoutstat
->busy_timer
, now
);
645 if (ktime_equal(mirror
->start_time
, notime
))
646 mirror
->start_time
= now
;
647 if (ktime_equal(mirror
->last_report_time
, notime
))
648 mirror
->last_report_time
= now
;
649 if (mirror
->report_interval
!= 0)
650 report_interval
= (s64
)mirror
->report_interval
* 1000LL;
651 else if (layoutstats_timer
!= 0)
652 report_interval
= (s64
)layoutstats_timer
* 1000LL;
653 if (ktime_to_ms(ktime_sub(now
, mirror
->last_report_time
)) >=
655 mirror
->last_report_time
= now
;
663 nfs4_ff_layout_stat_io_update_requested(struct nfs4_ff_layoutstat
*layoutstat
,
666 struct nfs4_ff_io_stat
*iostat
= &layoutstat
->io_stat
;
668 iostat
->ops_requested
++;
669 iostat
->bytes_requested
+= requested
;
673 nfs4_ff_layout_stat_io_update_completed(struct nfs4_ff_layoutstat
*layoutstat
,
676 ktime_t time_completed
,
677 ktime_t time_started
)
679 struct nfs4_ff_io_stat
*iostat
= &layoutstat
->io_stat
;
680 ktime_t completion_time
= ktime_sub(time_completed
, time_started
);
683 iostat
->ops_completed
++;
684 iostat
->bytes_completed
+= completed
;
685 iostat
->bytes_not_delivered
+= requested
- completed
;
687 timer
= nfs4_ff_end_busy_timer(&layoutstat
->busy_timer
, time_completed
);
688 iostat
->total_busy_time
=
689 ktime_add(iostat
->total_busy_time
, timer
);
690 iostat
->aggregate_completion_time
=
691 ktime_add(iostat
->aggregate_completion_time
,
696 nfs4_ff_layout_stat_io_start_read(struct inode
*inode
,
697 struct nfs4_ff_layout_mirror
*mirror
,
698 __u64 requested
, ktime_t now
)
702 spin_lock(&mirror
->lock
);
703 report
= nfs4_ff_layoutstat_start_io(mirror
, &mirror
->read_stat
, now
);
704 nfs4_ff_layout_stat_io_update_requested(&mirror
->read_stat
, requested
);
705 spin_unlock(&mirror
->lock
);
708 pnfs_report_layoutstat(inode
, GFP_KERNEL
);
712 nfs4_ff_layout_stat_io_end_read(struct rpc_task
*task
,
713 struct nfs4_ff_layout_mirror
*mirror
,
717 spin_lock(&mirror
->lock
);
718 nfs4_ff_layout_stat_io_update_completed(&mirror
->read_stat
,
719 requested
, completed
,
720 ktime_get(), task
->tk_start
);
721 spin_unlock(&mirror
->lock
);
725 nfs4_ff_layout_stat_io_start_write(struct inode
*inode
,
726 struct nfs4_ff_layout_mirror
*mirror
,
727 __u64 requested
, ktime_t now
)
731 spin_lock(&mirror
->lock
);
732 report
= nfs4_ff_layoutstat_start_io(mirror
, &mirror
->write_stat
, now
);
733 nfs4_ff_layout_stat_io_update_requested(&mirror
->write_stat
, requested
);
734 spin_unlock(&mirror
->lock
);
737 pnfs_report_layoutstat(inode
, GFP_NOIO
);
741 nfs4_ff_layout_stat_io_end_write(struct rpc_task
*task
,
742 struct nfs4_ff_layout_mirror
*mirror
,
745 enum nfs3_stable_how committed
)
747 if (committed
== NFS_UNSTABLE
)
748 requested
= completed
= 0;
750 spin_lock(&mirror
->lock
);
751 nfs4_ff_layout_stat_io_update_completed(&mirror
->write_stat
,
752 requested
, completed
, ktime_get(), task
->tk_start
);
753 spin_unlock(&mirror
->lock
);
757 ff_layout_alloc_commit_info(struct pnfs_layout_segment
*lseg
,
758 struct nfs_commit_info
*cinfo
,
761 struct nfs4_ff_layout_segment
*fls
= FF_LAYOUT_LSEG(lseg
);
762 struct pnfs_commit_bucket
*buckets
;
765 if (cinfo
->ds
->nbuckets
!= 0) {
766 /* This assumes there is only one RW lseg per file.
767 * To support multiple lseg per file, we need to
768 * change struct pnfs_commit_bucket to allow dynamic
769 * increasing nbuckets.
774 size
= ff_layout_get_lseg_count(fls
) * FF_LAYOUT_MIRROR_COUNT(lseg
);
776 buckets
= kcalloc(size
, sizeof(struct pnfs_commit_bucket
),
783 spin_lock(&cinfo
->inode
->i_lock
);
784 if (cinfo
->ds
->nbuckets
!= 0)
787 cinfo
->ds
->buckets
= buckets
;
788 cinfo
->ds
->nbuckets
= size
;
789 for (i
= 0; i
< size
; i
++) {
790 INIT_LIST_HEAD(&buckets
[i
].written
);
791 INIT_LIST_HEAD(&buckets
[i
].committing
);
792 /* mark direct verifier as unset */
793 buckets
[i
].direct_verf
.committed
=
794 NFS_INVALID_STABLE_HOW
;
797 spin_unlock(&cinfo
->inode
->i_lock
);
802 static struct nfs4_pnfs_ds
*
803 ff_layout_choose_best_ds_for_read(struct pnfs_layout_segment
*lseg
,
807 struct nfs4_ff_layout_segment
*fls
= FF_LAYOUT_LSEG(lseg
);
808 struct nfs4_pnfs_ds
*ds
;
811 /* mirrors are sorted by efficiency */
812 for (idx
= start_idx
; idx
< fls
->mirror_array_cnt
; idx
++) {
813 ds
= nfs4_ff_layout_prepare_ds(lseg
, idx
, false);
824 ff_layout_pg_get_read(struct nfs_pageio_descriptor
*pgio
,
825 struct nfs_page
*req
,
829 pnfs_put_lseg(pgio
->pg_lseg
);
830 pgio
->pg_lseg
= pnfs_update_layout(pgio
->pg_inode
,
837 if (IS_ERR(pgio
->pg_lseg
)) {
838 pgio
->pg_error
= PTR_ERR(pgio
->pg_lseg
);
839 pgio
->pg_lseg
= NULL
;
842 /* If we don't have checking, do get a IOMODE_RW
843 * segment, and the server wants to avoid READs
846 if (pgio
->pg_lseg
&& !strict_iomode
&&
847 ff_layout_avoid_read_on_rw(pgio
->pg_lseg
)) {
848 strict_iomode
= true;
854 ff_layout_pg_init_read(struct nfs_pageio_descriptor
*pgio
,
855 struct nfs_page
*req
)
857 struct nfs_pgio_mirror
*pgm
;
858 struct nfs4_ff_layout_mirror
*mirror
;
859 struct nfs4_pnfs_ds
*ds
;
862 /* Use full layout for now */
864 ff_layout_pg_get_read(pgio
, req
, false);
865 else if (ff_layout_avoid_read_on_rw(pgio
->pg_lseg
))
866 ff_layout_pg_get_read(pgio
, req
, true);
868 /* If no lseg, fall back to read through mds */
869 if (pgio
->pg_lseg
== NULL
)
872 ds
= ff_layout_choose_best_ds_for_read(pgio
->pg_lseg
, 0, &ds_idx
);
874 if (ff_layout_no_fallback_to_mds(pgio
->pg_lseg
))
880 mirror
= FF_LAYOUT_COMP(pgio
->pg_lseg
, ds_idx
);
882 pgio
->pg_mirror_idx
= ds_idx
;
884 /* read always uses only one mirror - idx 0 for pgio layer */
885 pgm
= &pgio
->pg_mirrors
[0];
886 pgm
->pg_bsize
= mirror
->mirror_ds
->ds_versions
[0].rsize
;
890 pnfs_put_lseg(pgio
->pg_lseg
);
891 pgio
->pg_lseg
= NULL
;
892 nfs_pageio_reset_read_mds(pgio
);
896 pnfs_set_lo_fail(pgio
->pg_lseg
);
897 pnfs_put_lseg(pgio
->pg_lseg
);
898 pgio
->pg_lseg
= NULL
;
902 ff_layout_pg_init_write(struct nfs_pageio_descriptor
*pgio
,
903 struct nfs_page
*req
)
905 struct nfs4_ff_layout_mirror
*mirror
;
906 struct nfs_pgio_mirror
*pgm
;
907 struct nfs_commit_info cinfo
;
908 struct nfs4_pnfs_ds
*ds
;
912 if (!pgio
->pg_lseg
) {
913 pgio
->pg_lseg
= pnfs_update_layout(pgio
->pg_inode
,
920 if (IS_ERR(pgio
->pg_lseg
)) {
921 pgio
->pg_error
= PTR_ERR(pgio
->pg_lseg
);
922 pgio
->pg_lseg
= NULL
;
926 /* If no lseg, fall back to write through mds */
927 if (pgio
->pg_lseg
== NULL
)
930 nfs_init_cinfo(&cinfo
, pgio
->pg_inode
, pgio
->pg_dreq
);
931 status
= ff_layout_alloc_commit_info(pgio
->pg_lseg
, &cinfo
, GFP_NOFS
);
935 /* Use a direct mapping of ds_idx to pgio mirror_idx */
936 if (WARN_ON_ONCE(pgio
->pg_mirror_count
!=
937 FF_LAYOUT_MIRROR_COUNT(pgio
->pg_lseg
)))
940 for (i
= 0; i
< pgio
->pg_mirror_count
; i
++) {
941 ds
= nfs4_ff_layout_prepare_ds(pgio
->pg_lseg
, i
, true);
943 if (ff_layout_no_fallback_to_mds(pgio
->pg_lseg
))
948 pgm
= &pgio
->pg_mirrors
[i
];
949 mirror
= FF_LAYOUT_COMP(pgio
->pg_lseg
, i
);
950 pgm
->pg_bsize
= mirror
->mirror_ds
->ds_versions
[0].wsize
;
956 pnfs_put_lseg(pgio
->pg_lseg
);
957 pgio
->pg_lseg
= NULL
;
958 nfs_pageio_reset_write_mds(pgio
);
962 pnfs_set_lo_fail(pgio
->pg_lseg
);
963 pnfs_put_lseg(pgio
->pg_lseg
);
964 pgio
->pg_lseg
= NULL
;
968 ff_layout_pg_get_mirror_count_write(struct nfs_pageio_descriptor
*pgio
,
969 struct nfs_page
*req
)
971 if (!pgio
->pg_lseg
) {
972 pgio
->pg_lseg
= pnfs_update_layout(pgio
->pg_inode
,
979 if (IS_ERR(pgio
->pg_lseg
)) {
980 pgio
->pg_error
= PTR_ERR(pgio
->pg_lseg
);
981 pgio
->pg_lseg
= NULL
;
986 return FF_LAYOUT_MIRROR_COUNT(pgio
->pg_lseg
);
988 /* no lseg means that pnfs is not in use, so no mirroring here */
989 nfs_pageio_reset_write_mds(pgio
);
994 static const struct nfs_pageio_ops ff_layout_pg_read_ops
= {
995 .pg_init
= ff_layout_pg_init_read
,
996 .pg_test
= pnfs_generic_pg_test
,
997 .pg_doio
= pnfs_generic_pg_readpages
,
998 .pg_cleanup
= pnfs_generic_pg_cleanup
,
1001 static const struct nfs_pageio_ops ff_layout_pg_write_ops
= {
1002 .pg_init
= ff_layout_pg_init_write
,
1003 .pg_test
= pnfs_generic_pg_test
,
1004 .pg_doio
= pnfs_generic_pg_writepages
,
1005 .pg_get_mirror_count
= ff_layout_pg_get_mirror_count_write
,
1006 .pg_cleanup
= pnfs_generic_pg_cleanup
,
1009 static void ff_layout_reset_write(struct nfs_pgio_header
*hdr
, bool retry_pnfs
)
1011 struct rpc_task
*task
= &hdr
->task
;
1013 pnfs_layoutcommit_inode(hdr
->inode
, false);
1016 dprintk("%s Reset task %5u for i/o through pNFS "
1017 "(req %s/%llu, %u bytes @ offset %llu)\n", __func__
,
1019 hdr
->inode
->i_sb
->s_id
,
1020 (unsigned long long)NFS_FILEID(hdr
->inode
),
1022 (unsigned long long)hdr
->args
.offset
);
1024 hdr
->completion_ops
->reschedule_io(hdr
);
1028 if (!test_and_set_bit(NFS_IOHDR_REDO
, &hdr
->flags
)) {
1029 dprintk("%s Reset task %5u for i/o through MDS "
1030 "(req %s/%llu, %u bytes @ offset %llu)\n", __func__
,
1032 hdr
->inode
->i_sb
->s_id
,
1033 (unsigned long long)NFS_FILEID(hdr
->inode
),
1035 (unsigned long long)hdr
->args
.offset
);
1037 task
->tk_status
= pnfs_write_done_resend_to_mds(hdr
);
1041 static void ff_layout_reset_read(struct nfs_pgio_header
*hdr
)
1043 struct rpc_task
*task
= &hdr
->task
;
1045 pnfs_layoutcommit_inode(hdr
->inode
, false);
1047 if (!test_and_set_bit(NFS_IOHDR_REDO
, &hdr
->flags
)) {
1048 dprintk("%s Reset task %5u for i/o through MDS "
1049 "(req %s/%llu, %u bytes @ offset %llu)\n", __func__
,
1051 hdr
->inode
->i_sb
->s_id
,
1052 (unsigned long long)NFS_FILEID(hdr
->inode
),
1054 (unsigned long long)hdr
->args
.offset
);
1056 task
->tk_status
= pnfs_read_done_resend_to_mds(hdr
);
1060 static int ff_layout_async_handle_error_v4(struct rpc_task
*task
,
1061 struct nfs4_state
*state
,
1062 struct nfs_client
*clp
,
1063 struct pnfs_layout_segment
*lseg
,
1066 struct pnfs_layout_hdr
*lo
= lseg
->pls_layout
;
1067 struct inode
*inode
= lo
->plh_inode
;
1068 struct nfs_server
*mds_server
= NFS_SERVER(inode
);
1070 struct nfs4_deviceid_node
*devid
= FF_LAYOUT_DEVID_NODE(lseg
, idx
);
1071 struct nfs_client
*mds_client
= mds_server
->nfs_client
;
1072 struct nfs4_slot_table
*tbl
= &clp
->cl_session
->fc_slot_table
;
1074 if (task
->tk_status
>= 0)
1077 switch (task
->tk_status
) {
1078 /* MDS state errors */
1079 case -NFS4ERR_DELEG_REVOKED
:
1080 case -NFS4ERR_ADMIN_REVOKED
:
1081 case -NFS4ERR_BAD_STATEID
:
1084 nfs_remove_bad_delegation(state
->inode
);
1085 case -NFS4ERR_OPENMODE
:
1088 if (nfs4_schedule_stateid_recovery(mds_server
, state
) < 0)
1089 goto out_bad_stateid
;
1090 goto wait_on_recovery
;
1091 case -NFS4ERR_EXPIRED
:
1092 if (state
!= NULL
) {
1093 if (nfs4_schedule_stateid_recovery(mds_server
, state
) < 0)
1094 goto out_bad_stateid
;
1096 nfs4_schedule_lease_recovery(mds_client
);
1097 goto wait_on_recovery
;
1098 /* DS session errors */
1099 case -NFS4ERR_BADSESSION
:
1100 case -NFS4ERR_BADSLOT
:
1101 case -NFS4ERR_BAD_HIGH_SLOT
:
1102 case -NFS4ERR_DEADSESSION
:
1103 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION
:
1104 case -NFS4ERR_SEQ_FALSE_RETRY
:
1105 case -NFS4ERR_SEQ_MISORDERED
:
1106 dprintk("%s ERROR %d, Reset session. Exchangeid "
1107 "flags 0x%x\n", __func__
, task
->tk_status
,
1108 clp
->cl_exchange_flags
);
1109 nfs4_schedule_session_recovery(clp
->cl_session
, task
->tk_status
);
1111 case -NFS4ERR_DELAY
:
1112 case -NFS4ERR_GRACE
:
1113 rpc_delay(task
, FF_LAYOUT_POLL_RETRY_MAX
);
1115 case -NFS4ERR_RETRY_UNCACHED_REP
:
1117 /* Invalidate Layout errors */
1118 case -NFS4ERR_PNFS_NO_LAYOUT
:
1119 case -ESTALE
: /* mapped NFS4ERR_STALE */
1120 case -EBADHANDLE
: /* mapped NFS4ERR_BADHANDLE */
1121 case -EISDIR
: /* mapped NFS4ERR_ISDIR */
1122 case -NFS4ERR_FHEXPIRED
:
1123 case -NFS4ERR_WRONG_TYPE
:
1124 dprintk("%s Invalid layout error %d\n", __func__
,
1127 * Destroy layout so new i/o will get a new layout.
1128 * Layout will not be destroyed until all current lseg
1129 * references are put. Mark layout as invalid to resend failed
1130 * i/o and all i/o waiting on the slot table to the MDS until
1131 * layout is destroyed and a new valid layout is obtained.
1133 pnfs_destroy_layout(NFS_I(inode
));
1134 rpc_wake_up(&tbl
->slot_tbl_waitq
);
1136 /* RPC connection errors */
1144 dprintk("%s DS connection error %d\n", __func__
,
1146 nfs4_mark_deviceid_unavailable(devid
);
1147 rpc_wake_up(&tbl
->slot_tbl_waitq
);
1150 if (ff_layout_avoid_mds_available_ds(lseg
))
1151 return -NFS4ERR_RESET_TO_PNFS
;
1153 dprintk("%s Retry through MDS. Error %d\n", __func__
,
1155 return -NFS4ERR_RESET_TO_MDS
;
1158 task
->tk_status
= 0;
1161 task
->tk_status
= -EIO
;
1164 rpc_sleep_on(&mds_client
->cl_rpcwaitq
, task
, NULL
);
1165 if (test_bit(NFS4CLNT_MANAGER_RUNNING
, &mds_client
->cl_state
) == 0)
1166 rpc_wake_up_queued_task(&mds_client
->cl_rpcwaitq
, task
);
1170 /* Retry all errors through either pNFS or MDS except for -EJUKEBOX */
1171 static int ff_layout_async_handle_error_v3(struct rpc_task
*task
,
1172 struct pnfs_layout_segment
*lseg
,
1175 struct nfs4_deviceid_node
*devid
= FF_LAYOUT_DEVID_NODE(lseg
, idx
);
1177 if (task
->tk_status
>= 0)
1180 switch (task
->tk_status
) {
1181 /* File access problems. Don't mark the device as unavailable */
1190 nfs_inc_stats(lseg
->pls_layout
->plh_inode
, NFSIOS_DELAY
);
1193 dprintk("%s DS connection error %d\n", __func__
,
1195 nfs4_mark_deviceid_unavailable(devid
);
1197 /* FIXME: Need to prevent infinite looping here. */
1198 return -NFS4ERR_RESET_TO_PNFS
;
1200 task
->tk_status
= 0;
1201 rpc_restart_call_prepare(task
);
1202 rpc_delay(task
, NFS_JUKEBOX_RETRY_TIME
);
1206 static int ff_layout_async_handle_error(struct rpc_task
*task
,
1207 struct nfs4_state
*state
,
1208 struct nfs_client
*clp
,
1209 struct pnfs_layout_segment
*lseg
,
1212 int vers
= clp
->cl_nfs_mod
->rpc_vers
->number
;
1216 return ff_layout_async_handle_error_v3(task
, lseg
, idx
);
1218 return ff_layout_async_handle_error_v4(task
, state
, clp
,
1221 /* should never happen */
1227 static void ff_layout_io_track_ds_error(struct pnfs_layout_segment
*lseg
,
1228 int idx
, u64 offset
, u64 length
,
1229 u32 status
, int opnum
, int error
)
1231 struct nfs4_ff_layout_mirror
*mirror
;
1238 case -EPROTONOSUPPORT
:
1249 status
= NFS4ERR_NXIO
;
1252 status
= NFS4ERR_ACCESS
;
1267 mirror
= FF_LAYOUT_COMP(lseg
, idx
);
1268 err
= ff_layout_track_ds_error(FF_LAYOUT_FROM_HDR(lseg
->pls_layout
),
1269 mirror
, offset
, length
, status
, opnum
,
1271 pnfs_error_mark_layout_for_return(lseg
->pls_layout
->plh_inode
, lseg
);
1272 dprintk("%s: err %d op %d status %u\n", __func__
, err
, opnum
, status
);
1275 /* NFS_PROTO call done callback routines */
1276 static int ff_layout_read_done_cb(struct rpc_task
*task
,
1277 struct nfs_pgio_header
*hdr
)
1281 trace_nfs4_pnfs_read(hdr
, task
->tk_status
);
1282 if (task
->tk_status
< 0)
1283 ff_layout_io_track_ds_error(hdr
->lseg
, hdr
->pgio_mirror_idx
,
1284 hdr
->args
.offset
, hdr
->args
.count
,
1285 hdr
->res
.op_status
, OP_READ
,
1287 err
= ff_layout_async_handle_error(task
, hdr
->args
.context
->state
,
1288 hdr
->ds_clp
, hdr
->lseg
,
1289 hdr
->pgio_mirror_idx
);
1292 case -NFS4ERR_RESET_TO_PNFS
:
1293 if (ff_layout_choose_best_ds_for_read(hdr
->lseg
,
1294 hdr
->pgio_mirror_idx
+ 1,
1295 &hdr
->pgio_mirror_idx
))
1297 pnfs_read_resend_pnfs(hdr
);
1298 return task
->tk_status
;
1299 case -NFS4ERR_RESET_TO_MDS
:
1300 ff_layout_reset_read(hdr
);
1301 return task
->tk_status
;
1308 rpc_restart_call_prepare(task
);
1313 ff_layout_need_layoutcommit(struct pnfs_layout_segment
*lseg
)
1315 return !(FF_LAYOUT_LSEG(lseg
)->flags
& FF_FLAGS_NO_LAYOUTCOMMIT
);
1319 * We reference the rpc_cred of the first WRITE that triggers the need for
1320 * a LAYOUTCOMMIT, and use it to send the layoutcommit compound.
1321 * rfc5661 is not clear about which credential should be used.
1323 * Flexlayout client should treat DS replied FILE_SYNC as DATA_SYNC, so
1324 * to follow http://www.rfc-editor.org/errata_search.php?rfc=5661&eid=2751
1325 * we always send layoutcommit after DS writes.
1328 ff_layout_set_layoutcommit(struct nfs_pgio_header
*hdr
)
1330 if (!ff_layout_need_layoutcommit(hdr
->lseg
))
1333 pnfs_set_layoutcommit(hdr
->inode
, hdr
->lseg
,
1334 hdr
->mds_offset
+ hdr
->res
.count
);
1335 dprintk("%s inode %lu pls_end_pos %lu\n", __func__
, hdr
->inode
->i_ino
,
1336 (unsigned long) NFS_I(hdr
->inode
)->layout
->plh_lwb
);
1340 ff_layout_device_unavailable(struct pnfs_layout_segment
*lseg
, int idx
)
1342 /* No mirroring for now */
1343 struct nfs4_deviceid_node
*node
= FF_LAYOUT_DEVID_NODE(lseg
, idx
);
1345 return ff_layout_test_devid_unavailable(node
);
1348 static void ff_layout_read_record_layoutstats_start(struct rpc_task
*task
,
1349 struct nfs_pgio_header
*hdr
)
1351 if (test_and_set_bit(NFS_IOHDR_STAT
, &hdr
->flags
))
1353 nfs4_ff_layout_stat_io_start_read(hdr
->inode
,
1354 FF_LAYOUT_COMP(hdr
->lseg
, hdr
->pgio_mirror_idx
),
1359 static void ff_layout_read_record_layoutstats_done(struct rpc_task
*task
,
1360 struct nfs_pgio_header
*hdr
)
1362 if (!test_and_clear_bit(NFS_IOHDR_STAT
, &hdr
->flags
))
1364 nfs4_ff_layout_stat_io_end_read(task
,
1365 FF_LAYOUT_COMP(hdr
->lseg
, hdr
->pgio_mirror_idx
),
1370 static int ff_layout_read_prepare_common(struct rpc_task
*task
,
1371 struct nfs_pgio_header
*hdr
)
1373 if (unlikely(test_bit(NFS_CONTEXT_BAD
, &hdr
->args
.context
->flags
))) {
1374 rpc_exit(task
, -EIO
);
1377 if (ff_layout_device_unavailable(hdr
->lseg
, hdr
->pgio_mirror_idx
)) {
1378 rpc_exit(task
, -EHOSTDOWN
);
1382 ff_layout_read_record_layoutstats_start(task
, hdr
);
1387 * Call ops for the async read/write cases
1388 * In the case of dense layouts, the offset needs to be reset to its
1391 static void ff_layout_read_prepare_v3(struct rpc_task
*task
, void *data
)
1393 struct nfs_pgio_header
*hdr
= data
;
1395 if (ff_layout_read_prepare_common(task
, hdr
))
1398 rpc_call_start(task
);
1401 static int ff_layout_setup_sequence(struct nfs_client
*ds_clp
,
1402 struct nfs4_sequence_args
*args
,
1403 struct nfs4_sequence_res
*res
,
1404 struct rpc_task
*task
)
1406 if (ds_clp
->cl_session
)
1407 return nfs41_setup_sequence(ds_clp
->cl_session
,
1411 return nfs40_setup_sequence(ds_clp
->cl_slot_tbl
,
1417 static void ff_layout_read_prepare_v4(struct rpc_task
*task
, void *data
)
1419 struct nfs_pgio_header
*hdr
= data
;
1421 if (ff_layout_setup_sequence(hdr
->ds_clp
,
1422 &hdr
->args
.seq_args
,
1427 if (ff_layout_read_prepare_common(task
, hdr
))
1430 if (nfs4_set_rw_stateid(&hdr
->args
.stateid
, hdr
->args
.context
,
1431 hdr
->args
.lock_context
, FMODE_READ
) == -EIO
)
1432 rpc_exit(task
, -EIO
); /* lost lock, terminate I/O */
1435 static void ff_layout_read_call_done(struct rpc_task
*task
, void *data
)
1437 struct nfs_pgio_header
*hdr
= data
;
1439 dprintk("--> %s task->tk_status %d\n", __func__
, task
->tk_status
);
1441 if (test_bit(NFS_IOHDR_REDO
, &hdr
->flags
) &&
1442 task
->tk_status
== 0) {
1443 nfs4_sequence_done(task
, &hdr
->res
.seq_res
);
1447 /* Note this may cause RPC to be resent */
1448 hdr
->mds_ops
->rpc_call_done(task
, hdr
);
1451 static void ff_layout_read_count_stats(struct rpc_task
*task
, void *data
)
1453 struct nfs_pgio_header
*hdr
= data
;
1455 ff_layout_read_record_layoutstats_done(task
, hdr
);
1456 rpc_count_iostats_metrics(task
,
1457 &NFS_CLIENT(hdr
->inode
)->cl_metrics
[NFSPROC4_CLNT_READ
]);
1460 static void ff_layout_read_release(void *data
)
1462 struct nfs_pgio_header
*hdr
= data
;
1464 ff_layout_read_record_layoutstats_done(&hdr
->task
, hdr
);
1465 pnfs_generic_rw_release(data
);
1469 static int ff_layout_write_done_cb(struct rpc_task
*task
,
1470 struct nfs_pgio_header
*hdr
)
1474 trace_nfs4_pnfs_write(hdr
, task
->tk_status
);
1475 if (task
->tk_status
< 0)
1476 ff_layout_io_track_ds_error(hdr
->lseg
, hdr
->pgio_mirror_idx
,
1477 hdr
->args
.offset
, hdr
->args
.count
,
1478 hdr
->res
.op_status
, OP_WRITE
,
1480 err
= ff_layout_async_handle_error(task
, hdr
->args
.context
->state
,
1481 hdr
->ds_clp
, hdr
->lseg
,
1482 hdr
->pgio_mirror_idx
);
1485 case -NFS4ERR_RESET_TO_PNFS
:
1486 ff_layout_reset_write(hdr
, true);
1487 return task
->tk_status
;
1488 case -NFS4ERR_RESET_TO_MDS
:
1489 ff_layout_reset_write(hdr
, false);
1490 return task
->tk_status
;
1495 if (hdr
->res
.verf
->committed
== NFS_FILE_SYNC
||
1496 hdr
->res
.verf
->committed
== NFS_DATA_SYNC
)
1497 ff_layout_set_layoutcommit(hdr
);
1499 /* zero out fattr since we don't care DS attr at all */
1500 hdr
->fattr
.valid
= 0;
1501 if (task
->tk_status
>= 0)
1502 nfs_writeback_update_inode(hdr
);
1507 static int ff_layout_commit_done_cb(struct rpc_task
*task
,
1508 struct nfs_commit_data
*data
)
1512 trace_nfs4_pnfs_commit_ds(data
, task
->tk_status
);
1513 if (task
->tk_status
< 0)
1514 ff_layout_io_track_ds_error(data
->lseg
, data
->ds_commit_index
,
1515 data
->args
.offset
, data
->args
.count
,
1516 data
->res
.op_status
, OP_COMMIT
,
1518 err
= ff_layout_async_handle_error(task
, NULL
, data
->ds_clp
,
1519 data
->lseg
, data
->ds_commit_index
);
1522 case -NFS4ERR_RESET_TO_PNFS
:
1523 pnfs_generic_prepare_to_resend_writes(data
);
1525 case -NFS4ERR_RESET_TO_MDS
:
1526 pnfs_generic_prepare_to_resend_writes(data
);
1529 rpc_restart_call_prepare(task
);
1533 if (data
->verf
.committed
== NFS_UNSTABLE
1534 && ff_layout_need_layoutcommit(data
->lseg
))
1535 pnfs_set_layoutcommit(data
->inode
, data
->lseg
, data
->lwb
);
1540 static void ff_layout_write_record_layoutstats_start(struct rpc_task
*task
,
1541 struct nfs_pgio_header
*hdr
)
1543 if (test_and_set_bit(NFS_IOHDR_STAT
, &hdr
->flags
))
1545 nfs4_ff_layout_stat_io_start_write(hdr
->inode
,
1546 FF_LAYOUT_COMP(hdr
->lseg
, hdr
->pgio_mirror_idx
),
1551 static void ff_layout_write_record_layoutstats_done(struct rpc_task
*task
,
1552 struct nfs_pgio_header
*hdr
)
1554 if (!test_and_clear_bit(NFS_IOHDR_STAT
, &hdr
->flags
))
1556 nfs4_ff_layout_stat_io_end_write(task
,
1557 FF_LAYOUT_COMP(hdr
->lseg
, hdr
->pgio_mirror_idx
),
1558 hdr
->args
.count
, hdr
->res
.count
,
1559 hdr
->res
.verf
->committed
);
1562 static int ff_layout_write_prepare_common(struct rpc_task
*task
,
1563 struct nfs_pgio_header
*hdr
)
1565 if (unlikely(test_bit(NFS_CONTEXT_BAD
, &hdr
->args
.context
->flags
))) {
1566 rpc_exit(task
, -EIO
);
1570 if (ff_layout_device_unavailable(hdr
->lseg
, hdr
->pgio_mirror_idx
)) {
1571 rpc_exit(task
, -EHOSTDOWN
);
1575 ff_layout_write_record_layoutstats_start(task
, hdr
);
1579 static void ff_layout_write_prepare_v3(struct rpc_task
*task
, void *data
)
1581 struct nfs_pgio_header
*hdr
= data
;
1583 if (ff_layout_write_prepare_common(task
, hdr
))
1586 rpc_call_start(task
);
1589 static void ff_layout_write_prepare_v4(struct rpc_task
*task
, void *data
)
1591 struct nfs_pgio_header
*hdr
= data
;
1593 if (ff_layout_setup_sequence(hdr
->ds_clp
,
1594 &hdr
->args
.seq_args
,
1599 if (ff_layout_write_prepare_common(task
, hdr
))
1602 if (nfs4_set_rw_stateid(&hdr
->args
.stateid
, hdr
->args
.context
,
1603 hdr
->args
.lock_context
, FMODE_WRITE
) == -EIO
)
1604 rpc_exit(task
, -EIO
); /* lost lock, terminate I/O */
1607 static void ff_layout_write_call_done(struct rpc_task
*task
, void *data
)
1609 struct nfs_pgio_header
*hdr
= data
;
1611 if (test_bit(NFS_IOHDR_REDO
, &hdr
->flags
) &&
1612 task
->tk_status
== 0) {
1613 nfs4_sequence_done(task
, &hdr
->res
.seq_res
);
1617 /* Note this may cause RPC to be resent */
1618 hdr
->mds_ops
->rpc_call_done(task
, hdr
);
1621 static void ff_layout_write_count_stats(struct rpc_task
*task
, void *data
)
1623 struct nfs_pgio_header
*hdr
= data
;
1625 ff_layout_write_record_layoutstats_done(task
, hdr
);
1626 rpc_count_iostats_metrics(task
,
1627 &NFS_CLIENT(hdr
->inode
)->cl_metrics
[NFSPROC4_CLNT_WRITE
]);
1630 static void ff_layout_write_release(void *data
)
1632 struct nfs_pgio_header
*hdr
= data
;
1634 ff_layout_write_record_layoutstats_done(&hdr
->task
, hdr
);
1635 pnfs_generic_rw_release(data
);
1638 static void ff_layout_commit_record_layoutstats_start(struct rpc_task
*task
,
1639 struct nfs_commit_data
*cdata
)
1641 if (test_and_set_bit(NFS_IOHDR_STAT
, &cdata
->flags
))
1643 nfs4_ff_layout_stat_io_start_write(cdata
->inode
,
1644 FF_LAYOUT_COMP(cdata
->lseg
, cdata
->ds_commit_index
),
1648 static void ff_layout_commit_record_layoutstats_done(struct rpc_task
*task
,
1649 struct nfs_commit_data
*cdata
)
1651 struct nfs_page
*req
;
1654 if (!test_and_clear_bit(NFS_IOHDR_STAT
, &cdata
->flags
))
1657 if (task
->tk_status
== 0) {
1658 list_for_each_entry(req
, &cdata
->pages
, wb_list
)
1659 count
+= req
->wb_bytes
;
1661 nfs4_ff_layout_stat_io_end_write(task
,
1662 FF_LAYOUT_COMP(cdata
->lseg
, cdata
->ds_commit_index
),
1663 count
, count
, NFS_FILE_SYNC
);
1666 static void ff_layout_commit_prepare_common(struct rpc_task
*task
,
1667 struct nfs_commit_data
*cdata
)
1669 ff_layout_commit_record_layoutstats_start(task
, cdata
);
1672 static void ff_layout_commit_prepare_v3(struct rpc_task
*task
, void *data
)
1674 ff_layout_commit_prepare_common(task
, data
);
1675 rpc_call_start(task
);
1678 static void ff_layout_commit_prepare_v4(struct rpc_task
*task
, void *data
)
1680 struct nfs_commit_data
*wdata
= data
;
1682 if (ff_layout_setup_sequence(wdata
->ds_clp
,
1683 &wdata
->args
.seq_args
,
1684 &wdata
->res
.seq_res
,
1687 ff_layout_commit_prepare_common(task
, data
);
1690 static void ff_layout_commit_done(struct rpc_task
*task
, void *data
)
1692 pnfs_generic_write_commit_done(task
, data
);
1695 static void ff_layout_commit_count_stats(struct rpc_task
*task
, void *data
)
1697 struct nfs_commit_data
*cdata
= data
;
1699 ff_layout_commit_record_layoutstats_done(task
, cdata
);
1700 rpc_count_iostats_metrics(task
,
1701 &NFS_CLIENT(cdata
->inode
)->cl_metrics
[NFSPROC4_CLNT_COMMIT
]);
1704 static void ff_layout_commit_release(void *data
)
1706 struct nfs_commit_data
*cdata
= data
;
1708 ff_layout_commit_record_layoutstats_done(&cdata
->task
, cdata
);
1709 pnfs_generic_commit_release(data
);
1712 static const struct rpc_call_ops ff_layout_read_call_ops_v3
= {
1713 .rpc_call_prepare
= ff_layout_read_prepare_v3
,
1714 .rpc_call_done
= ff_layout_read_call_done
,
1715 .rpc_count_stats
= ff_layout_read_count_stats
,
1716 .rpc_release
= ff_layout_read_release
,
1719 static const struct rpc_call_ops ff_layout_read_call_ops_v4
= {
1720 .rpc_call_prepare
= ff_layout_read_prepare_v4
,
1721 .rpc_call_done
= ff_layout_read_call_done
,
1722 .rpc_count_stats
= ff_layout_read_count_stats
,
1723 .rpc_release
= ff_layout_read_release
,
1726 static const struct rpc_call_ops ff_layout_write_call_ops_v3
= {
1727 .rpc_call_prepare
= ff_layout_write_prepare_v3
,
1728 .rpc_call_done
= ff_layout_write_call_done
,
1729 .rpc_count_stats
= ff_layout_write_count_stats
,
1730 .rpc_release
= ff_layout_write_release
,
1733 static const struct rpc_call_ops ff_layout_write_call_ops_v4
= {
1734 .rpc_call_prepare
= ff_layout_write_prepare_v4
,
1735 .rpc_call_done
= ff_layout_write_call_done
,
1736 .rpc_count_stats
= ff_layout_write_count_stats
,
1737 .rpc_release
= ff_layout_write_release
,
1740 static const struct rpc_call_ops ff_layout_commit_call_ops_v3
= {
1741 .rpc_call_prepare
= ff_layout_commit_prepare_v3
,
1742 .rpc_call_done
= ff_layout_commit_done
,
1743 .rpc_count_stats
= ff_layout_commit_count_stats
,
1744 .rpc_release
= ff_layout_commit_release
,
1747 static const struct rpc_call_ops ff_layout_commit_call_ops_v4
= {
1748 .rpc_call_prepare
= ff_layout_commit_prepare_v4
,
1749 .rpc_call_done
= ff_layout_commit_done
,
1750 .rpc_count_stats
= ff_layout_commit_count_stats
,
1751 .rpc_release
= ff_layout_commit_release
,
1754 static enum pnfs_try_status
1755 ff_layout_read_pagelist(struct nfs_pgio_header
*hdr
)
1757 struct pnfs_layout_segment
*lseg
= hdr
->lseg
;
1758 struct nfs4_pnfs_ds
*ds
;
1759 struct rpc_clnt
*ds_clnt
;
1760 struct rpc_cred
*ds_cred
;
1761 loff_t offset
= hdr
->args
.offset
;
1762 u32 idx
= hdr
->pgio_mirror_idx
;
1766 dprintk("--> %s ino %lu pgbase %u req %Zu@%llu\n",
1767 __func__
, hdr
->inode
->i_ino
,
1768 hdr
->args
.pgbase
, (size_t)hdr
->args
.count
, offset
);
1770 ds
= nfs4_ff_layout_prepare_ds(lseg
, idx
, false);
1774 ds_clnt
= nfs4_ff_find_or_create_ds_client(lseg
, idx
, ds
->ds_clp
,
1776 if (IS_ERR(ds_clnt
))
1779 ds_cred
= ff_layout_get_ds_cred(lseg
, idx
, hdr
->cred
);
1783 vers
= nfs4_ff_layout_ds_version(lseg
, idx
);
1785 dprintk("%s USE DS: %s cl_count %d vers %d\n", __func__
,
1786 ds
->ds_remotestr
, atomic_read(&ds
->ds_clp
->cl_count
), vers
);
1788 hdr
->pgio_done_cb
= ff_layout_read_done_cb
;
1789 atomic_inc(&ds
->ds_clp
->cl_count
);
1790 hdr
->ds_clp
= ds
->ds_clp
;
1791 fh
= nfs4_ff_layout_select_ds_fh(lseg
, idx
);
1795 * Note that if we ever decide to split across DSes,
1796 * then we may need to handle dense-like offsets.
1798 hdr
->args
.offset
= offset
;
1799 hdr
->mds_offset
= offset
;
1801 /* Perform an asynchronous read to ds */
1802 nfs_initiate_pgio(ds_clnt
, hdr
, ds_cred
, ds
->ds_clp
->rpc_ops
,
1803 vers
== 3 ? &ff_layout_read_call_ops_v3
:
1804 &ff_layout_read_call_ops_v4
,
1805 0, RPC_TASK_SOFTCONN
);
1806 put_rpccred(ds_cred
);
1807 return PNFS_ATTEMPTED
;
1810 if (ff_layout_avoid_mds_available_ds(lseg
))
1811 return PNFS_TRY_AGAIN
;
1812 return PNFS_NOT_ATTEMPTED
;
1815 /* Perform async writes. */
1816 static enum pnfs_try_status
1817 ff_layout_write_pagelist(struct nfs_pgio_header
*hdr
, int sync
)
1819 struct pnfs_layout_segment
*lseg
= hdr
->lseg
;
1820 struct nfs4_pnfs_ds
*ds
;
1821 struct rpc_clnt
*ds_clnt
;
1822 struct rpc_cred
*ds_cred
;
1823 loff_t offset
= hdr
->args
.offset
;
1826 int idx
= hdr
->pgio_mirror_idx
;
1828 ds
= nfs4_ff_layout_prepare_ds(lseg
, idx
, true);
1830 return PNFS_NOT_ATTEMPTED
;
1832 ds_clnt
= nfs4_ff_find_or_create_ds_client(lseg
, idx
, ds
->ds_clp
,
1834 if (IS_ERR(ds_clnt
))
1835 return PNFS_NOT_ATTEMPTED
;
1837 ds_cred
= ff_layout_get_ds_cred(lseg
, idx
, hdr
->cred
);
1839 return PNFS_NOT_ATTEMPTED
;
1841 vers
= nfs4_ff_layout_ds_version(lseg
, idx
);
1843 dprintk("%s ino %lu sync %d req %Zu@%llu DS: %s cl_count %d vers %d\n",
1844 __func__
, hdr
->inode
->i_ino
, sync
, (size_t) hdr
->args
.count
,
1845 offset
, ds
->ds_remotestr
, atomic_read(&ds
->ds_clp
->cl_count
),
1848 hdr
->pgio_done_cb
= ff_layout_write_done_cb
;
1849 atomic_inc(&ds
->ds_clp
->cl_count
);
1850 hdr
->ds_clp
= ds
->ds_clp
;
1851 hdr
->ds_commit_idx
= idx
;
1852 fh
= nfs4_ff_layout_select_ds_fh(lseg
, idx
);
1857 * Note that if we ever decide to split across DSes,
1858 * then we may need to handle dense-like offsets.
1860 hdr
->args
.offset
= offset
;
1862 /* Perform an asynchronous write */
1863 nfs_initiate_pgio(ds_clnt
, hdr
, ds_cred
, ds
->ds_clp
->rpc_ops
,
1864 vers
== 3 ? &ff_layout_write_call_ops_v3
:
1865 &ff_layout_write_call_ops_v4
,
1866 sync
, RPC_TASK_SOFTCONN
);
1867 put_rpccred(ds_cred
);
1868 return PNFS_ATTEMPTED
;
1871 static u32
calc_ds_index_from_commit(struct pnfs_layout_segment
*lseg
, u32 i
)
1876 static struct nfs_fh
*
1877 select_ds_fh_from_commit(struct pnfs_layout_segment
*lseg
, u32 i
)
1879 struct nfs4_ff_layout_segment
*flseg
= FF_LAYOUT_LSEG(lseg
);
1881 /* FIXME: Assume that there is only one NFS version available
1884 return &flseg
->mirror_array
[i
]->fh_versions
[0];
1887 static int ff_layout_initiate_commit(struct nfs_commit_data
*data
, int how
)
1889 struct pnfs_layout_segment
*lseg
= data
->lseg
;
1890 struct nfs4_pnfs_ds
*ds
;
1891 struct rpc_clnt
*ds_clnt
;
1892 struct rpc_cred
*ds_cred
;
1897 idx
= calc_ds_index_from_commit(lseg
, data
->ds_commit_index
);
1898 ds
= nfs4_ff_layout_prepare_ds(lseg
, idx
, true);
1902 ds_clnt
= nfs4_ff_find_or_create_ds_client(lseg
, idx
, ds
->ds_clp
,
1904 if (IS_ERR(ds_clnt
))
1907 ds_cred
= ff_layout_get_ds_cred(lseg
, idx
, data
->cred
);
1911 vers
= nfs4_ff_layout_ds_version(lseg
, idx
);
1913 dprintk("%s ino %lu, how %d cl_count %d vers %d\n", __func__
,
1914 data
->inode
->i_ino
, how
, atomic_read(&ds
->ds_clp
->cl_count
),
1916 data
->commit_done_cb
= ff_layout_commit_done_cb
;
1917 data
->cred
= ds_cred
;
1918 atomic_inc(&ds
->ds_clp
->cl_count
);
1919 data
->ds_clp
= ds
->ds_clp
;
1920 fh
= select_ds_fh_from_commit(lseg
, data
->ds_commit_index
);
1924 ret
= nfs_initiate_commit(ds_clnt
, data
, ds
->ds_clp
->rpc_ops
,
1925 vers
== 3 ? &ff_layout_commit_call_ops_v3
:
1926 &ff_layout_commit_call_ops_v4
,
1927 how
, RPC_TASK_SOFTCONN
);
1928 put_rpccred(ds_cred
);
1931 pnfs_generic_prepare_to_resend_writes(data
);
1932 pnfs_generic_commit_release(data
);
1937 ff_layout_commit_pagelist(struct inode
*inode
, struct list_head
*mds_pages
,
1938 int how
, struct nfs_commit_info
*cinfo
)
1940 return pnfs_generic_commit_pagelist(inode
, mds_pages
, how
, cinfo
,
1941 ff_layout_initiate_commit
);
1944 static struct pnfs_ds_commit_info
*
1945 ff_layout_get_ds_info(struct inode
*inode
)
1947 struct pnfs_layout_hdr
*layout
= NFS_I(inode
)->layout
;
1952 return &FF_LAYOUT_FROM_HDR(layout
)->commit_info
;
1956 ff_layout_free_deviceid_node(struct nfs4_deviceid_node
*d
)
1958 nfs4_ff_layout_free_deviceid(container_of(d
, struct nfs4_ff_layout_ds
,
1962 static int ff_layout_encode_ioerr(struct nfs4_flexfile_layout
*flo
,
1963 struct xdr_stream
*xdr
,
1964 const struct nfs4_layoutreturn_args
*args
)
1966 struct pnfs_layout_hdr
*hdr
= &flo
->generic_hdr
;
1968 int count
= 0, ret
= 0;
1970 start
= xdr_reserve_space(xdr
, 4);
1971 if (unlikely(!start
))
1974 /* This assume we always return _ALL_ layouts */
1975 spin_lock(&hdr
->plh_inode
->i_lock
);
1976 ret
= ff_layout_encode_ds_ioerr(flo
, xdr
, &count
, &args
->range
);
1977 spin_unlock(&hdr
->plh_inode
->i_lock
);
1979 *start
= cpu_to_be32(count
);
1984 /* report nothing for now */
1985 static void ff_layout_encode_iostats(struct nfs4_flexfile_layout
*flo
,
1986 struct xdr_stream
*xdr
,
1987 const struct nfs4_layoutreturn_args
*args
)
1991 p
= xdr_reserve_space(xdr
, 4);
1993 *p
= cpu_to_be32(0);
1996 static struct nfs4_deviceid_node
*
1997 ff_layout_alloc_deviceid_node(struct nfs_server
*server
,
1998 struct pnfs_device
*pdev
, gfp_t gfp_flags
)
2000 struct nfs4_ff_layout_ds
*dsaddr
;
2002 dsaddr
= nfs4_ff_alloc_deviceid_node(server
, pdev
, gfp_flags
);
2005 return &dsaddr
->id_node
;
2009 ff_layout_encode_layoutreturn(struct pnfs_layout_hdr
*lo
,
2010 struct xdr_stream
*xdr
,
2011 const struct nfs4_layoutreturn_args
*args
)
2013 struct nfs4_flexfile_layout
*flo
= FF_LAYOUT_FROM_HDR(lo
);
2016 dprintk("%s: Begin\n", __func__
);
2017 start
= xdr_reserve_space(xdr
, 4);
2020 ff_layout_encode_ioerr(flo
, xdr
, args
);
2021 ff_layout_encode_iostats(flo
, xdr
, args
);
2023 *start
= cpu_to_be32((xdr
->p
- start
- 1) * 4);
2024 dprintk("%s: Return\n", __func__
);
2028 ff_layout_ntop4(const struct sockaddr
*sap
, char *buf
, const size_t buflen
)
2030 const struct sockaddr_in
*sin
= (struct sockaddr_in
*)sap
;
2032 return snprintf(buf
, buflen
, "%pI4", &sin
->sin_addr
);
2036 ff_layout_ntop6_noscopeid(const struct sockaddr
*sap
, char *buf
,
2039 const struct sockaddr_in6
*sin6
= (struct sockaddr_in6
*)sap
;
2040 const struct in6_addr
*addr
= &sin6
->sin6_addr
;
2043 * RFC 4291, Section 2.2.2
2045 * Shorthanded ANY address
2047 if (ipv6_addr_any(addr
))
2048 return snprintf(buf
, buflen
, "::");
2051 * RFC 4291, Section 2.2.2
2053 * Shorthanded loopback address
2055 if (ipv6_addr_loopback(addr
))
2056 return snprintf(buf
, buflen
, "::1");
2059 * RFC 4291, Section 2.2.3
2061 * Special presentation address format for mapped v4
2064 if (ipv6_addr_v4mapped(addr
))
2065 return snprintf(buf
, buflen
, "::ffff:%pI4",
2066 &addr
->s6_addr32
[3]);
2069 * RFC 4291, Section 2.2.1
2071 return snprintf(buf
, buflen
, "%pI6c", addr
);
2074 /* Derived from rpc_sockaddr2uaddr */
2076 ff_layout_encode_netaddr(struct xdr_stream
*xdr
, struct nfs4_pnfs_ds_addr
*da
)
2078 struct sockaddr
*sap
= (struct sockaddr
*)&da
->da_addr
;
2079 char portbuf
[RPCBIND_MAXUADDRPLEN
];
2080 char addrbuf
[RPCBIND_MAXUADDRLEN
];
2082 unsigned short port
;
2086 switch (sap
->sa_family
) {
2088 if (ff_layout_ntop4(sap
, addrbuf
, sizeof(addrbuf
)) == 0)
2090 port
= ntohs(((struct sockaddr_in
*)sap
)->sin_port
);
2095 if (ff_layout_ntop6_noscopeid(sap
, addrbuf
, sizeof(addrbuf
)) == 0)
2097 port
= ntohs(((struct sockaddr_in6
*)sap
)->sin6_port
);
2102 /* we only support tcp and tcp6 */
2107 snprintf(portbuf
, sizeof(portbuf
), ".%u.%u", port
>> 8, port
& 0xff);
2108 len
= strlcat(addrbuf
, portbuf
, sizeof(addrbuf
));
2110 p
= xdr_reserve_space(xdr
, 4 + netid_len
);
2111 xdr_encode_opaque(p
, netid
, netid_len
);
2113 p
= xdr_reserve_space(xdr
, 4 + len
);
2114 xdr_encode_opaque(p
, addrbuf
, len
);
2118 ff_layout_encode_nfstime(struct xdr_stream
*xdr
,
2121 struct timespec64 ts
;
2124 p
= xdr_reserve_space(xdr
, 12);
2125 ts
= ktime_to_timespec64(t
);
2126 p
= xdr_encode_hyper(p
, ts
.tv_sec
);
2127 *p
++ = cpu_to_be32(ts
.tv_nsec
);
2131 ff_layout_encode_io_latency(struct xdr_stream
*xdr
,
2132 struct nfs4_ff_io_stat
*stat
)
2136 p
= xdr_reserve_space(xdr
, 5 * 8);
2137 p
= xdr_encode_hyper(p
, stat
->ops_requested
);
2138 p
= xdr_encode_hyper(p
, stat
->bytes_requested
);
2139 p
= xdr_encode_hyper(p
, stat
->ops_completed
);
2140 p
= xdr_encode_hyper(p
, stat
->bytes_completed
);
2141 p
= xdr_encode_hyper(p
, stat
->bytes_not_delivered
);
2142 ff_layout_encode_nfstime(xdr
, stat
->total_busy_time
);
2143 ff_layout_encode_nfstime(xdr
, stat
->aggregate_completion_time
);
2147 ff_layout_encode_layoutstats(struct xdr_stream
*xdr
,
2148 struct nfs42_layoutstat_args
*args
,
2149 struct nfs42_layoutstat_devinfo
*devinfo
)
2151 struct nfs4_ff_layout_mirror
*mirror
= devinfo
->layout_private
;
2152 struct nfs4_pnfs_ds_addr
*da
;
2153 struct nfs4_pnfs_ds
*ds
= mirror
->mirror_ds
->ds
;
2154 struct nfs_fh
*fh
= &mirror
->fh_versions
[0];
2157 da
= list_first_entry(&ds
->ds_addrs
, struct nfs4_pnfs_ds_addr
, da_node
);
2158 dprintk("%s: DS %s: encoding address %s\n",
2159 __func__
, ds
->ds_remotestr
, da
->da_remotestr
);
2160 /* layoutupdate length */
2161 start
= xdr_reserve_space(xdr
, 4);
2163 ff_layout_encode_netaddr(xdr
, da
);
2165 p
= xdr_reserve_space(xdr
, 4 + fh
->size
);
2166 xdr_encode_opaque(p
, fh
->data
, fh
->size
);
2167 /* ff_io_latency4 read */
2168 spin_lock(&mirror
->lock
);
2169 ff_layout_encode_io_latency(xdr
, &mirror
->read_stat
.io_stat
);
2170 /* ff_io_latency4 write */
2171 ff_layout_encode_io_latency(xdr
, &mirror
->write_stat
.io_stat
);
2172 spin_unlock(&mirror
->lock
);
2174 ff_layout_encode_nfstime(xdr
, ktime_sub(ktime_get(), mirror
->start_time
));
2176 p
= xdr_reserve_space(xdr
, 4);
2177 *p
= cpu_to_be32(false);
2179 *start
= cpu_to_be32((xdr
->p
- start
- 1) * 4);
2183 ff_layout_mirror_prepare_stats(struct nfs42_layoutstat_args
*args
,
2184 struct pnfs_layout_hdr
*lo
,
2187 struct nfs4_flexfile_layout
*ff_layout
= FF_LAYOUT_FROM_HDR(lo
);
2188 struct nfs4_ff_layout_mirror
*mirror
;
2189 struct nfs4_deviceid_node
*dev
;
2190 struct nfs42_layoutstat_devinfo
*devinfo
;
2193 list_for_each_entry(mirror
, &ff_layout
->mirrors
, mirrors
) {
2196 if (!mirror
->mirror_ds
)
2198 /* mirror refcount put in cleanup_layoutstats */
2199 if (!atomic_inc_not_zero(&mirror
->ref
))
2201 dev
= &mirror
->mirror_ds
->id_node
;
2202 devinfo
= &args
->devinfo
[i
];
2203 memcpy(&devinfo
->dev_id
, &dev
->deviceid
, NFS4_DEVICEID4_SIZE
);
2204 devinfo
->offset
= 0;
2205 devinfo
->length
= NFS4_MAX_UINT64
;
2206 devinfo
->read_count
= mirror
->read_stat
.io_stat
.ops_completed
;
2207 devinfo
->read_bytes
= mirror
->read_stat
.io_stat
.bytes_completed
;
2208 devinfo
->write_count
= mirror
->write_stat
.io_stat
.ops_completed
;
2209 devinfo
->write_bytes
= mirror
->write_stat
.io_stat
.bytes_completed
;
2210 devinfo
->layout_type
= LAYOUT_FLEX_FILES
;
2211 devinfo
->layoutstats_encode
= ff_layout_encode_layoutstats
;
2212 devinfo
->layout_private
= mirror
;
2220 ff_layout_prepare_layoutstats(struct nfs42_layoutstat_args
*args
)
2222 struct nfs4_flexfile_layout
*ff_layout
;
2223 struct nfs4_ff_layout_mirror
*mirror
;
2226 spin_lock(&args
->inode
->i_lock
);
2227 ff_layout
= FF_LAYOUT_FROM_HDR(NFS_I(args
->inode
)->layout
);
2228 list_for_each_entry(mirror
, &ff_layout
->mirrors
, mirrors
) {
2229 if (atomic_read(&mirror
->ref
) != 0)
2232 spin_unlock(&args
->inode
->i_lock
);
2233 /* For now, send at most PNFS_LAYOUTSTATS_MAXDEV statistics */
2234 if (dev_count
> PNFS_LAYOUTSTATS_MAXDEV
) {
2235 dprintk("%s: truncating devinfo to limit (%d:%d)\n",
2236 __func__
, dev_count
, PNFS_LAYOUTSTATS_MAXDEV
);
2237 dev_count
= PNFS_LAYOUTSTATS_MAXDEV
;
2239 args
->devinfo
= kmalloc_array(dev_count
, sizeof(*args
->devinfo
), GFP_NOIO
);
2243 spin_lock(&args
->inode
->i_lock
);
2244 args
->num_dev
= ff_layout_mirror_prepare_stats(args
,
2245 &ff_layout
->generic_hdr
, dev_count
);
2246 spin_unlock(&args
->inode
->i_lock
);
2252 ff_layout_cleanup_layoutstats(struct nfs42_layoutstat_data
*data
)
2254 struct nfs4_ff_layout_mirror
*mirror
;
2257 for (i
= 0; i
< data
->args
.num_dev
; i
++) {
2258 mirror
= data
->args
.devinfo
[i
].layout_private
;
2259 data
->args
.devinfo
[i
].layout_private
= NULL
;
2260 ff_layout_put_mirror(mirror
);
2264 static struct pnfs_layoutdriver_type flexfilelayout_type
= {
2265 .id
= LAYOUT_FLEX_FILES
,
2266 .name
= "LAYOUT_FLEX_FILES",
2267 .owner
= THIS_MODULE
,
2268 .alloc_layout_hdr
= ff_layout_alloc_layout_hdr
,
2269 .free_layout_hdr
= ff_layout_free_layout_hdr
,
2270 .alloc_lseg
= ff_layout_alloc_lseg
,
2271 .free_lseg
= ff_layout_free_lseg
,
2272 .add_lseg
= ff_layout_add_lseg
,
2273 .pg_read_ops
= &ff_layout_pg_read_ops
,
2274 .pg_write_ops
= &ff_layout_pg_write_ops
,
2275 .get_ds_info
= ff_layout_get_ds_info
,
2276 .free_deviceid_node
= ff_layout_free_deviceid_node
,
2277 .mark_request_commit
= pnfs_layout_mark_request_commit
,
2278 .clear_request_commit
= pnfs_generic_clear_request_commit
,
2279 .scan_commit_lists
= pnfs_generic_scan_commit_lists
,
2280 .recover_commit_reqs
= pnfs_generic_recover_commit_reqs
,
2281 .commit_pagelist
= ff_layout_commit_pagelist
,
2282 .read_pagelist
= ff_layout_read_pagelist
,
2283 .write_pagelist
= ff_layout_write_pagelist
,
2284 .alloc_deviceid_node
= ff_layout_alloc_deviceid_node
,
2285 .encode_layoutreturn
= ff_layout_encode_layoutreturn
,
2286 .sync
= pnfs_nfs_generic_sync
,
2287 .prepare_layoutstats
= ff_layout_prepare_layoutstats
,
2288 .cleanup_layoutstats
= ff_layout_cleanup_layoutstats
,
2291 static int __init
nfs4flexfilelayout_init(void)
2293 printk(KERN_INFO
"%s: NFSv4 Flexfile Layout Driver Registering...\n",
2295 if (!ff_zero_group
) {
2296 ff_zero_group
= groups_alloc(0);
2300 return pnfs_register_layoutdriver(&flexfilelayout_type
);
2303 static void __exit
nfs4flexfilelayout_exit(void)
2305 printk(KERN_INFO
"%s: NFSv4 Flexfile Layout Driver Unregistering...\n",
2307 pnfs_unregister_layoutdriver(&flexfilelayout_type
);
2308 if (ff_zero_group
) {
2309 put_group_info(ff_zero_group
);
2310 ff_zero_group
= NULL
;
2314 MODULE_ALIAS("nfs-layouttype4-4");
2316 MODULE_LICENSE("GPL");
2317 MODULE_DESCRIPTION("The NFSv4 flexfile layout driver");
2319 module_init(nfs4flexfilelayout_init
);
2320 module_exit(nfs4flexfilelayout_exit
);