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36#include <linux/file.h>
37#include <linux/slab.h>
38#include <linux/namei.h>
39#include <linux/statfs.h>
40#include <linux/utsname.h>
41#include <linux/pagemap.h>
42#include <linux/sunrpc/svcauth_gss.h>
43
44#include "idmap.h"
45#include "acl.h"
46#include "xdr4.h"
47#include "vfs.h"
48#include "state.h"
49#include "cache.h"
50#include "netns.h"
51#include "pnfs.h"
52
53#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
54#include <linux/security.h>
55#endif
56
57
58#define NFSDDBG_FACILITY NFSDDBG_XDR
59
60const u32 nfsd_suppattrs[3][3] = {
61 {NFSD4_SUPPORTED_ATTRS_WORD0,
62 NFSD4_SUPPORTED_ATTRS_WORD1,
63 NFSD4_SUPPORTED_ATTRS_WORD2},
64
65 {NFSD4_1_SUPPORTED_ATTRS_WORD0,
66 NFSD4_1_SUPPORTED_ATTRS_WORD1,
67 NFSD4_1_SUPPORTED_ATTRS_WORD2},
68
69 {NFSD4_1_SUPPORTED_ATTRS_WORD0,
70 NFSD4_1_SUPPORTED_ATTRS_WORD1,
71 NFSD4_2_SUPPORTED_ATTRS_WORD2},
72};
73
74
75
76
77
78
79#define NFS4_REFERRAL_FSID_MAJOR 0x8000000ULL
80#define NFS4_REFERRAL_FSID_MINOR 0x8000000ULL
81
82static __be32
83check_filename(char *str, int len)
84{
85 int i;
86
87 if (len == 0)
88 return nfserr_inval;
89 if (isdotent(str, len))
90 return nfserr_badname;
91 for (i = 0; i < len; i++)
92 if (str[i] == '/')
93 return nfserr_badname;
94 return 0;
95}
96
97#define DECODE_HEAD \
98 __be32 *p; \
99 __be32 status
100#define DECODE_TAIL \
101 status = 0; \
102out: \
103 return status; \
104xdr_error: \
105 dprintk("NFSD: xdr error (%s:%d)\n", \
106 __FILE__, __LINE__); \
107 status = nfserr_bad_xdr; \
108 goto out
109
110#define READMEM(x,nbytes) do { \
111 x = (char *)p; \
112 p += XDR_QUADLEN(nbytes); \
113} while (0)
114#define SAVEMEM(x,nbytes) do { \
115 if (!(x = (p==argp->tmp || p == argp->tmpp) ? \
116 savemem(argp, p, nbytes) : \
117 (char *)p)) { \
118 dprintk("NFSD: xdr error (%s:%d)\n", \
119 __FILE__, __LINE__); \
120 goto xdr_error; \
121 } \
122 p += XDR_QUADLEN(nbytes); \
123} while (0)
124#define COPYMEM(x,nbytes) do { \
125 memcpy((x), p, nbytes); \
126 p += XDR_QUADLEN(nbytes); \
127} while (0)
128
129
130#define READ_BUF(nbytes) do { \
131 if (nbytes <= (u32)((char *)argp->end - (char *)argp->p)) { \
132 p = argp->p; \
133 argp->p += XDR_QUADLEN(nbytes); \
134 } else if (!(p = read_buf(argp, nbytes))) { \
135 dprintk("NFSD: xdr error (%s:%d)\n", \
136 __FILE__, __LINE__); \
137 goto xdr_error; \
138 } \
139} while (0)
140
141static void next_decode_page(struct nfsd4_compoundargs *argp)
142{
143 argp->p = page_address(argp->pagelist[0]);
144 argp->pagelist++;
145 if (argp->pagelen < PAGE_SIZE) {
146 argp->end = argp->p + XDR_QUADLEN(argp->pagelen);
147 argp->pagelen = 0;
148 } else {
149 argp->end = argp->p + (PAGE_SIZE>>2);
150 argp->pagelen -= PAGE_SIZE;
151 }
152}
153
154static __be32 *read_buf(struct nfsd4_compoundargs *argp, u32 nbytes)
155{
156
157
158
159 unsigned int avail = (char *)argp->end - (char *)argp->p;
160 __be32 *p;
161
162 if (argp->pagelen == 0) {
163 struct kvec *vec = &argp->rqstp->rq_arg.tail[0];
164
165 if (!argp->tail) {
166 argp->tail = true;
167 avail = vec->iov_len;
168 argp->p = vec->iov_base;
169 argp->end = vec->iov_base + avail;
170 }
171
172 if (avail < nbytes)
173 return NULL;
174
175 p = argp->p;
176 argp->p += XDR_QUADLEN(nbytes);
177 return p;
178 }
179
180 if (avail + argp->pagelen < nbytes)
181 return NULL;
182 if (avail + PAGE_SIZE < nbytes)
183 return NULL;
184
185 if (nbytes <= sizeof(argp->tmp))
186 p = argp->tmp;
187 else {
188 kfree(argp->tmpp);
189 p = argp->tmpp = kmalloc(nbytes, GFP_KERNEL);
190 if (!p)
191 return NULL;
192
193 }
194
195
196
197
198
199 memcpy(p, argp->p, avail);
200 next_decode_page(argp);
201 memcpy(((char*)p)+avail, argp->p, (nbytes - avail));
202 argp->p += XDR_QUADLEN(nbytes - avail);
203 return p;
204}
205
206static int zero_clientid(clientid_t *clid)
207{
208 return (clid->cl_boot == 0) && (clid->cl_id == 0);
209}
210
211
212
213
214
215
216
217
218
219static void *
220svcxdr_tmpalloc(struct nfsd4_compoundargs *argp, u32 len)
221{
222 struct svcxdr_tmpbuf *tb;
223
224 tb = kmalloc(sizeof(*tb) + len, GFP_KERNEL);
225 if (!tb)
226 return NULL;
227 tb->next = argp->to_free;
228 argp->to_free = tb;
229 return tb->buf;
230}
231
232
233
234
235
236
237
238
239static char *
240svcxdr_dupstr(struct nfsd4_compoundargs *argp, void *buf, u32 len)
241{
242 char *p = svcxdr_tmpalloc(argp, len + 1);
243
244 if (!p)
245 return NULL;
246 memcpy(p, buf, len);
247 p[len] = '\0';
248 return p;
249}
250
251
252
253
254
255
256
257
258
259
260
261static char *savemem(struct nfsd4_compoundargs *argp, __be32 *p, int nbytes)
262{
263 void *ret;
264
265 ret = svcxdr_tmpalloc(argp, nbytes);
266 if (!ret)
267 return NULL;
268 memcpy(ret, p, nbytes);
269 return ret;
270}
271
272static __be32
273nfsd4_decode_time(struct nfsd4_compoundargs *argp, struct timespec64 *tv)
274{
275 DECODE_HEAD;
276
277 READ_BUF(12);
278 p = xdr_decode_hyper(p, &tv->tv_sec);
279 tv->tv_nsec = be32_to_cpup(p++);
280 if (tv->tv_nsec >= (u32)1000000000)
281 return nfserr_inval;
282
283 DECODE_TAIL;
284}
285
286static __be32
287nfsd4_decode_bitmap(struct nfsd4_compoundargs *argp, u32 *bmval)
288{
289 u32 bmlen;
290 DECODE_HEAD;
291
292 bmval[0] = 0;
293 bmval[1] = 0;
294 bmval[2] = 0;
295
296 READ_BUF(4);
297 bmlen = be32_to_cpup(p++);
298 if (bmlen > 1000)
299 goto xdr_error;
300
301 READ_BUF(bmlen << 2);
302 if (bmlen > 0)
303 bmval[0] = be32_to_cpup(p++);
304 if (bmlen > 1)
305 bmval[1] = be32_to_cpup(p++);
306 if (bmlen > 2)
307 bmval[2] = be32_to_cpup(p++);
308
309 DECODE_TAIL;
310}
311
312static __be32
313nfsd4_decode_fattr(struct nfsd4_compoundargs *argp, u32 *bmval,
314 struct iattr *iattr, struct nfs4_acl **acl,
315 struct xdr_netobj *label, int *umask)
316{
317 int expected_len, len = 0;
318 u32 dummy32;
319 char *buf;
320
321 DECODE_HEAD;
322 iattr->ia_valid = 0;
323 if ((status = nfsd4_decode_bitmap(argp, bmval)))
324 return status;
325
326 if (bmval[0] & ~NFSD_WRITEABLE_ATTRS_WORD0
327 || bmval[1] & ~NFSD_WRITEABLE_ATTRS_WORD1
328 || bmval[2] & ~NFSD_WRITEABLE_ATTRS_WORD2) {
329 if (nfsd_attrs_supported(argp->minorversion, bmval))
330 return nfserr_inval;
331 return nfserr_attrnotsupp;
332 }
333
334 READ_BUF(4);
335 expected_len = be32_to_cpup(p++);
336
337 if (bmval[0] & FATTR4_WORD0_SIZE) {
338 READ_BUF(8);
339 len += 8;
340 p = xdr_decode_hyper(p, &iattr->ia_size);
341 iattr->ia_valid |= ATTR_SIZE;
342 }
343 if (bmval[0] & FATTR4_WORD0_ACL) {
344 u32 nace;
345 struct nfs4_ace *ace;
346
347 READ_BUF(4); len += 4;
348 nace = be32_to_cpup(p++);
349
350 if (nace > NFS4_ACL_MAX)
351 return nfserr_fbig;
352
353 *acl = svcxdr_tmpalloc(argp, nfs4_acl_bytes(nace));
354 if (*acl == NULL)
355 return nfserr_jukebox;
356
357 (*acl)->naces = nace;
358 for (ace = (*acl)->aces; ace < (*acl)->aces + nace; ace++) {
359 READ_BUF(16); len += 16;
360 ace->type = be32_to_cpup(p++);
361 ace->flag = be32_to_cpup(p++);
362 ace->access_mask = be32_to_cpup(p++);
363 dummy32 = be32_to_cpup(p++);
364 READ_BUF(dummy32);
365 len += XDR_QUADLEN(dummy32) << 2;
366 READMEM(buf, dummy32);
367 ace->whotype = nfs4_acl_get_whotype(buf, dummy32);
368 status = nfs_ok;
369 if (ace->whotype != NFS4_ACL_WHO_NAMED)
370 ;
371 else if (ace->flag & NFS4_ACE_IDENTIFIER_GROUP)
372 status = nfsd_map_name_to_gid(argp->rqstp,
373 buf, dummy32, &ace->who_gid);
374 else
375 status = nfsd_map_name_to_uid(argp->rqstp,
376 buf, dummy32, &ace->who_uid);
377 if (status)
378 return status;
379 }
380 } else
381 *acl = NULL;
382 if (bmval[1] & FATTR4_WORD1_MODE) {
383 READ_BUF(4);
384 len += 4;
385 iattr->ia_mode = be32_to_cpup(p++);
386 iattr->ia_mode &= (S_IFMT | S_IALLUGO);
387 iattr->ia_valid |= ATTR_MODE;
388 }
389 if (bmval[1] & FATTR4_WORD1_OWNER) {
390 READ_BUF(4);
391 len += 4;
392 dummy32 = be32_to_cpup(p++);
393 READ_BUF(dummy32);
394 len += (XDR_QUADLEN(dummy32) << 2);
395 READMEM(buf, dummy32);
396 if ((status = nfsd_map_name_to_uid(argp->rqstp, buf, dummy32, &iattr->ia_uid)))
397 return status;
398 iattr->ia_valid |= ATTR_UID;
399 }
400 if (bmval[1] & FATTR4_WORD1_OWNER_GROUP) {
401 READ_BUF(4);
402 len += 4;
403 dummy32 = be32_to_cpup(p++);
404 READ_BUF(dummy32);
405 len += (XDR_QUADLEN(dummy32) << 2);
406 READMEM(buf, dummy32);
407 if ((status = nfsd_map_name_to_gid(argp->rqstp, buf, dummy32, &iattr->ia_gid)))
408 return status;
409 iattr->ia_valid |= ATTR_GID;
410 }
411 if (bmval[1] & FATTR4_WORD1_TIME_ACCESS_SET) {
412 READ_BUF(4);
413 len += 4;
414 dummy32 = be32_to_cpup(p++);
415 switch (dummy32) {
416 case NFS4_SET_TO_CLIENT_TIME:
417 len += 12;
418 status = nfsd4_decode_time(argp, &iattr->ia_atime);
419 if (status)
420 return status;
421 iattr->ia_valid |= (ATTR_ATIME | ATTR_ATIME_SET);
422 break;
423 case NFS4_SET_TO_SERVER_TIME:
424 iattr->ia_valid |= ATTR_ATIME;
425 break;
426 default:
427 goto xdr_error;
428 }
429 }
430 if (bmval[1] & FATTR4_WORD1_TIME_MODIFY_SET) {
431 READ_BUF(4);
432 len += 4;
433 dummy32 = be32_to_cpup(p++);
434 switch (dummy32) {
435 case NFS4_SET_TO_CLIENT_TIME:
436 len += 12;
437 status = nfsd4_decode_time(argp, &iattr->ia_mtime);
438 if (status)
439 return status;
440 iattr->ia_valid |= (ATTR_MTIME | ATTR_MTIME_SET);
441 break;
442 case NFS4_SET_TO_SERVER_TIME:
443 iattr->ia_valid |= ATTR_MTIME;
444 break;
445 default:
446 goto xdr_error;
447 }
448 }
449
450 label->len = 0;
451 if (IS_ENABLED(CONFIG_NFSD_V4_SECURITY_LABEL) &&
452 bmval[2] & FATTR4_WORD2_SECURITY_LABEL) {
453 READ_BUF(4);
454 len += 4;
455 dummy32 = be32_to_cpup(p++);
456 READ_BUF(4);
457 len += 4;
458 dummy32 = be32_to_cpup(p++);
459 READ_BUF(4);
460 len += 4;
461 dummy32 = be32_to_cpup(p++);
462 READ_BUF(dummy32);
463 if (dummy32 > NFS4_MAXLABELLEN)
464 return nfserr_badlabel;
465 len += (XDR_QUADLEN(dummy32) << 2);
466 READMEM(buf, dummy32);
467 label->len = dummy32;
468 label->data = svcxdr_dupstr(argp, buf, dummy32);
469 if (!label->data)
470 return nfserr_jukebox;
471 }
472 if (bmval[2] & FATTR4_WORD2_MODE_UMASK) {
473 if (!umask)
474 goto xdr_error;
475 READ_BUF(8);
476 len += 8;
477 dummy32 = be32_to_cpup(p++);
478 iattr->ia_mode = dummy32 & (S_IFMT | S_IALLUGO);
479 dummy32 = be32_to_cpup(p++);
480 *umask = dummy32 & S_IRWXUGO;
481 iattr->ia_valid |= ATTR_MODE;
482 }
483 if (len != expected_len)
484 goto xdr_error;
485
486 DECODE_TAIL;
487}
488
489static __be32
490nfsd4_decode_stateid(struct nfsd4_compoundargs *argp, stateid_t *sid)
491{
492 DECODE_HEAD;
493
494 READ_BUF(sizeof(stateid_t));
495 sid->si_generation = be32_to_cpup(p++);
496 COPYMEM(&sid->si_opaque, sizeof(stateid_opaque_t));
497
498 DECODE_TAIL;
499}
500
501static __be32
502nfsd4_decode_access(struct nfsd4_compoundargs *argp, struct nfsd4_access *access)
503{
504 DECODE_HEAD;
505
506 READ_BUF(4);
507 access->ac_req_access = be32_to_cpup(p++);
508
509 DECODE_TAIL;
510}
511
512static __be32 nfsd4_decode_cb_sec(struct nfsd4_compoundargs *argp, struct nfsd4_cb_sec *cbs)
513{
514 DECODE_HEAD;
515 struct user_namespace *userns = nfsd_user_namespace(argp->rqstp);
516 u32 dummy, uid, gid;
517 char *machine_name;
518 int i;
519 int nr_secflavs;
520
521
522 READ_BUF(4);
523 nr_secflavs = be32_to_cpup(p++);
524 if (nr_secflavs)
525 cbs->flavor = (u32)(-1);
526 else
527
528 cbs->flavor = 0;
529 for (i = 0; i < nr_secflavs; ++i) {
530 READ_BUF(4);
531 dummy = be32_to_cpup(p++);
532 switch (dummy) {
533 case RPC_AUTH_NULL:
534
535 if (cbs->flavor == (u32)(-1))
536 cbs->flavor = RPC_AUTH_NULL;
537 break;
538 case RPC_AUTH_UNIX:
539 READ_BUF(8);
540
541 dummy = be32_to_cpup(p++);
542
543
544 dummy = be32_to_cpup(p++);
545 READ_BUF(dummy);
546 SAVEMEM(machine_name, dummy);
547
548
549 READ_BUF(8);
550 uid = be32_to_cpup(p++);
551 gid = be32_to_cpup(p++);
552
553
554 READ_BUF(4);
555 dummy = be32_to_cpup(p++);
556 READ_BUF(dummy * 4);
557 if (cbs->flavor == (u32)(-1)) {
558 kuid_t kuid = make_kuid(userns, uid);
559 kgid_t kgid = make_kgid(userns, gid);
560 if (uid_valid(kuid) && gid_valid(kgid)) {
561 cbs->uid = kuid;
562 cbs->gid = kgid;
563 cbs->flavor = RPC_AUTH_UNIX;
564 } else {
565 dprintk("RPC_AUTH_UNIX with invalid"
566 "uid or gid ignoring!\n");
567 }
568 }
569 break;
570 case RPC_AUTH_GSS:
571 dprintk("RPC_AUTH_GSS callback secflavor "
572 "not supported!\n");
573 READ_BUF(8);
574
575 dummy = be32_to_cpup(p++);
576
577 dummy = be32_to_cpup(p++);
578 READ_BUF(dummy);
579 p += XDR_QUADLEN(dummy);
580
581 READ_BUF(4);
582 dummy = be32_to_cpup(p++);
583 READ_BUF(dummy);
584 break;
585 default:
586 dprintk("Illegal callback secflavor\n");
587 return nfserr_inval;
588 }
589 }
590 DECODE_TAIL;
591}
592
593static __be32 nfsd4_decode_backchannel_ctl(struct nfsd4_compoundargs *argp, struct nfsd4_backchannel_ctl *bc)
594{
595 DECODE_HEAD;
596
597 READ_BUF(4);
598 bc->bc_cb_program = be32_to_cpup(p++);
599 nfsd4_decode_cb_sec(argp, &bc->bc_cb_sec);
600
601 DECODE_TAIL;
602}
603
604static __be32 nfsd4_decode_bind_conn_to_session(struct nfsd4_compoundargs *argp, struct nfsd4_bind_conn_to_session *bcts)
605{
606 DECODE_HEAD;
607
608 READ_BUF(NFS4_MAX_SESSIONID_LEN + 8);
609 COPYMEM(bcts->sessionid.data, NFS4_MAX_SESSIONID_LEN);
610 bcts->dir = be32_to_cpup(p++);
611
612
613 DECODE_TAIL;
614}
615
616static __be32
617nfsd4_decode_close(struct nfsd4_compoundargs *argp, struct nfsd4_close *close)
618{
619 DECODE_HEAD;
620
621 READ_BUF(4);
622 close->cl_seqid = be32_to_cpup(p++);
623 return nfsd4_decode_stateid(argp, &close->cl_stateid);
624
625 DECODE_TAIL;
626}
627
628
629static __be32
630nfsd4_decode_commit(struct nfsd4_compoundargs *argp, struct nfsd4_commit *commit)
631{
632 DECODE_HEAD;
633
634 READ_BUF(12);
635 p = xdr_decode_hyper(p, &commit->co_offset);
636 commit->co_count = be32_to_cpup(p++);
637
638 DECODE_TAIL;
639}
640
641static __be32
642nfsd4_decode_create(struct nfsd4_compoundargs *argp, struct nfsd4_create *create)
643{
644 DECODE_HEAD;
645
646 READ_BUF(4);
647 create->cr_type = be32_to_cpup(p++);
648 switch (create->cr_type) {
649 case NF4LNK:
650 READ_BUF(4);
651 create->cr_datalen = be32_to_cpup(p++);
652 READ_BUF(create->cr_datalen);
653 create->cr_data = svcxdr_dupstr(argp, p, create->cr_datalen);
654 if (!create->cr_data)
655 return nfserr_jukebox;
656 break;
657 case NF4BLK:
658 case NF4CHR:
659 READ_BUF(8);
660 create->cr_specdata1 = be32_to_cpup(p++);
661 create->cr_specdata2 = be32_to_cpup(p++);
662 break;
663 case NF4SOCK:
664 case NF4FIFO:
665 case NF4DIR:
666 default:
667 break;
668 }
669
670 READ_BUF(4);
671 create->cr_namelen = be32_to_cpup(p++);
672 READ_BUF(create->cr_namelen);
673 SAVEMEM(create->cr_name, create->cr_namelen);
674 if ((status = check_filename(create->cr_name, create->cr_namelen)))
675 return status;
676
677 status = nfsd4_decode_fattr(argp, create->cr_bmval, &create->cr_iattr,
678 &create->cr_acl, &create->cr_label,
679 &create->cr_umask);
680 if (status)
681 goto out;
682
683 DECODE_TAIL;
684}
685
686static inline __be32
687nfsd4_decode_delegreturn(struct nfsd4_compoundargs *argp, struct nfsd4_delegreturn *dr)
688{
689 return nfsd4_decode_stateid(argp, &dr->dr_stateid);
690}
691
692static inline __be32
693nfsd4_decode_getattr(struct nfsd4_compoundargs *argp, struct nfsd4_getattr *getattr)
694{
695 return nfsd4_decode_bitmap(argp, getattr->ga_bmval);
696}
697
698static __be32
699nfsd4_decode_link(struct nfsd4_compoundargs *argp, struct nfsd4_link *link)
700{
701 DECODE_HEAD;
702
703 READ_BUF(4);
704 link->li_namelen = be32_to_cpup(p++);
705 READ_BUF(link->li_namelen);
706 SAVEMEM(link->li_name, link->li_namelen);
707 if ((status = check_filename(link->li_name, link->li_namelen)))
708 return status;
709
710 DECODE_TAIL;
711}
712
713static __be32
714nfsd4_decode_lock(struct nfsd4_compoundargs *argp, struct nfsd4_lock *lock)
715{
716 DECODE_HEAD;
717
718
719
720
721 READ_BUF(28);
722 lock->lk_type = be32_to_cpup(p++);
723 if ((lock->lk_type < NFS4_READ_LT) || (lock->lk_type > NFS4_WRITEW_LT))
724 goto xdr_error;
725 lock->lk_reclaim = be32_to_cpup(p++);
726 p = xdr_decode_hyper(p, &lock->lk_offset);
727 p = xdr_decode_hyper(p, &lock->lk_length);
728 lock->lk_is_new = be32_to_cpup(p++);
729
730 if (lock->lk_is_new) {
731 READ_BUF(4);
732 lock->lk_new_open_seqid = be32_to_cpup(p++);
733 status = nfsd4_decode_stateid(argp, &lock->lk_new_open_stateid);
734 if (status)
735 return status;
736 READ_BUF(8 + sizeof(clientid_t));
737 lock->lk_new_lock_seqid = be32_to_cpup(p++);
738 COPYMEM(&lock->lk_new_clientid, sizeof(clientid_t));
739 lock->lk_new_owner.len = be32_to_cpup(p++);
740 READ_BUF(lock->lk_new_owner.len);
741 READMEM(lock->lk_new_owner.data, lock->lk_new_owner.len);
742 } else {
743 status = nfsd4_decode_stateid(argp, &lock->lk_old_lock_stateid);
744 if (status)
745 return status;
746 READ_BUF(4);
747 lock->lk_old_lock_seqid = be32_to_cpup(p++);
748 }
749
750 DECODE_TAIL;
751}
752
753static __be32
754nfsd4_decode_lockt(struct nfsd4_compoundargs *argp, struct nfsd4_lockt *lockt)
755{
756 DECODE_HEAD;
757
758 READ_BUF(32);
759 lockt->lt_type = be32_to_cpup(p++);
760 if((lockt->lt_type < NFS4_READ_LT) || (lockt->lt_type > NFS4_WRITEW_LT))
761 goto xdr_error;
762 p = xdr_decode_hyper(p, &lockt->lt_offset);
763 p = xdr_decode_hyper(p, &lockt->lt_length);
764 COPYMEM(&lockt->lt_clientid, 8);
765 lockt->lt_owner.len = be32_to_cpup(p++);
766 READ_BUF(lockt->lt_owner.len);
767 READMEM(lockt->lt_owner.data, lockt->lt_owner.len);
768
769 DECODE_TAIL;
770}
771
772static __be32
773nfsd4_decode_locku(struct nfsd4_compoundargs *argp, struct nfsd4_locku *locku)
774{
775 DECODE_HEAD;
776
777 READ_BUF(8);
778 locku->lu_type = be32_to_cpup(p++);
779 if ((locku->lu_type < NFS4_READ_LT) || (locku->lu_type > NFS4_WRITEW_LT))
780 goto xdr_error;
781 locku->lu_seqid = be32_to_cpup(p++);
782 status = nfsd4_decode_stateid(argp, &locku->lu_stateid);
783 if (status)
784 return status;
785 READ_BUF(16);
786 p = xdr_decode_hyper(p, &locku->lu_offset);
787 p = xdr_decode_hyper(p, &locku->lu_length);
788
789 DECODE_TAIL;
790}
791
792static __be32
793nfsd4_decode_lookup(struct nfsd4_compoundargs *argp, struct nfsd4_lookup *lookup)
794{
795 DECODE_HEAD;
796
797 READ_BUF(4);
798 lookup->lo_len = be32_to_cpup(p++);
799 READ_BUF(lookup->lo_len);
800 SAVEMEM(lookup->lo_name, lookup->lo_len);
801 if ((status = check_filename(lookup->lo_name, lookup->lo_len)))
802 return status;
803
804 DECODE_TAIL;
805}
806
807static __be32 nfsd4_decode_share_access(struct nfsd4_compoundargs *argp, u32 *share_access, u32 *deleg_want, u32 *deleg_when)
808{
809 __be32 *p;
810 u32 w;
811
812 READ_BUF(4);
813 w = be32_to_cpup(p++);
814 *share_access = w & NFS4_SHARE_ACCESS_MASK;
815 *deleg_want = w & NFS4_SHARE_WANT_MASK;
816 if (deleg_when)
817 *deleg_when = w & NFS4_SHARE_WHEN_MASK;
818
819 switch (w & NFS4_SHARE_ACCESS_MASK) {
820 case NFS4_SHARE_ACCESS_READ:
821 case NFS4_SHARE_ACCESS_WRITE:
822 case NFS4_SHARE_ACCESS_BOTH:
823 break;
824 default:
825 return nfserr_bad_xdr;
826 }
827 w &= ~NFS4_SHARE_ACCESS_MASK;
828 if (!w)
829 return nfs_ok;
830 if (!argp->minorversion)
831 return nfserr_bad_xdr;
832 switch (w & NFS4_SHARE_WANT_MASK) {
833 case NFS4_SHARE_WANT_NO_PREFERENCE:
834 case NFS4_SHARE_WANT_READ_DELEG:
835 case NFS4_SHARE_WANT_WRITE_DELEG:
836 case NFS4_SHARE_WANT_ANY_DELEG:
837 case NFS4_SHARE_WANT_NO_DELEG:
838 case NFS4_SHARE_WANT_CANCEL:
839 break;
840 default:
841 return nfserr_bad_xdr;
842 }
843 w &= ~NFS4_SHARE_WANT_MASK;
844 if (!w)
845 return nfs_ok;
846
847 if (!deleg_when)
848 return nfserr_inval;
849 switch (w) {
850 case NFS4_SHARE_SIGNAL_DELEG_WHEN_RESRC_AVAIL:
851 case NFS4_SHARE_PUSH_DELEG_WHEN_UNCONTENDED:
852 case (NFS4_SHARE_SIGNAL_DELEG_WHEN_RESRC_AVAIL |
853 NFS4_SHARE_PUSH_DELEG_WHEN_UNCONTENDED):
854 return nfs_ok;
855 }
856xdr_error:
857 return nfserr_bad_xdr;
858}
859
860static __be32 nfsd4_decode_share_deny(struct nfsd4_compoundargs *argp, u32 *x)
861{
862 __be32 *p;
863
864 READ_BUF(4);
865 *x = be32_to_cpup(p++);
866
867 if (*x & ~NFS4_SHARE_DENY_BOTH)
868 return nfserr_bad_xdr;
869 return nfs_ok;
870xdr_error:
871 return nfserr_bad_xdr;
872}
873
874static __be32 nfsd4_decode_opaque(struct nfsd4_compoundargs *argp, struct xdr_netobj *o)
875{
876 __be32 *p;
877
878 READ_BUF(4);
879 o->len = be32_to_cpup(p++);
880
881 if (o->len == 0 || o->len > NFS4_OPAQUE_LIMIT)
882 return nfserr_bad_xdr;
883
884 READ_BUF(o->len);
885 SAVEMEM(o->data, o->len);
886 return nfs_ok;
887xdr_error:
888 return nfserr_bad_xdr;
889}
890
891static __be32
892nfsd4_decode_open(struct nfsd4_compoundargs *argp, struct nfsd4_open *open)
893{
894 DECODE_HEAD;
895 u32 dummy;
896
897 memset(open->op_bmval, 0, sizeof(open->op_bmval));
898 open->op_iattr.ia_valid = 0;
899 open->op_openowner = NULL;
900
901 open->op_xdr_error = 0;
902
903 READ_BUF(4);
904 open->op_seqid = be32_to_cpup(p++);
905
906 status = nfsd4_decode_share_access(argp, &open->op_share_access,
907 &open->op_deleg_want, &dummy);
908 if (status)
909 goto xdr_error;
910 status = nfsd4_decode_share_deny(argp, &open->op_share_deny);
911 if (status)
912 goto xdr_error;
913 READ_BUF(sizeof(clientid_t));
914 COPYMEM(&open->op_clientid, sizeof(clientid_t));
915 status = nfsd4_decode_opaque(argp, &open->op_owner);
916 if (status)
917 goto xdr_error;
918 READ_BUF(4);
919 open->op_create = be32_to_cpup(p++);
920 switch (open->op_create) {
921 case NFS4_OPEN_NOCREATE:
922 break;
923 case NFS4_OPEN_CREATE:
924 READ_BUF(4);
925 open->op_createmode = be32_to_cpup(p++);
926 switch (open->op_createmode) {
927 case NFS4_CREATE_UNCHECKED:
928 case NFS4_CREATE_GUARDED:
929 status = nfsd4_decode_fattr(argp, open->op_bmval,
930 &open->op_iattr, &open->op_acl, &open->op_label,
931 &open->op_umask);
932 if (status)
933 goto out;
934 break;
935 case NFS4_CREATE_EXCLUSIVE:
936 READ_BUF(NFS4_VERIFIER_SIZE);
937 COPYMEM(open->op_verf.data, NFS4_VERIFIER_SIZE);
938 break;
939 case NFS4_CREATE_EXCLUSIVE4_1:
940 if (argp->minorversion < 1)
941 goto xdr_error;
942 READ_BUF(NFS4_VERIFIER_SIZE);
943 COPYMEM(open->op_verf.data, NFS4_VERIFIER_SIZE);
944 status = nfsd4_decode_fattr(argp, open->op_bmval,
945 &open->op_iattr, &open->op_acl, &open->op_label,
946 &open->op_umask);
947 if (status)
948 goto out;
949 break;
950 default:
951 goto xdr_error;
952 }
953 break;
954 default:
955 goto xdr_error;
956 }
957
958
959 READ_BUF(4);
960 open->op_claim_type = be32_to_cpup(p++);
961 switch (open->op_claim_type) {
962 case NFS4_OPEN_CLAIM_NULL:
963 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
964 READ_BUF(4);
965 open->op_fname.len = be32_to_cpup(p++);
966 READ_BUF(open->op_fname.len);
967 SAVEMEM(open->op_fname.data, open->op_fname.len);
968 if ((status = check_filename(open->op_fname.data, open->op_fname.len)))
969 return status;
970 break;
971 case NFS4_OPEN_CLAIM_PREVIOUS:
972 READ_BUF(4);
973 open->op_delegate_type = be32_to_cpup(p++);
974 break;
975 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
976 status = nfsd4_decode_stateid(argp, &open->op_delegate_stateid);
977 if (status)
978 return status;
979 READ_BUF(4);
980 open->op_fname.len = be32_to_cpup(p++);
981 READ_BUF(open->op_fname.len);
982 SAVEMEM(open->op_fname.data, open->op_fname.len);
983 if ((status = check_filename(open->op_fname.data, open->op_fname.len)))
984 return status;
985 break;
986 case NFS4_OPEN_CLAIM_FH:
987 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
988 if (argp->minorversion < 1)
989 goto xdr_error;
990
991 break;
992 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
993 if (argp->minorversion < 1)
994 goto xdr_error;
995 status = nfsd4_decode_stateid(argp, &open->op_delegate_stateid);
996 if (status)
997 return status;
998 break;
999 default:
1000 goto xdr_error;
1001 }
1002
1003 DECODE_TAIL;
1004}
1005
1006static __be32
1007nfsd4_decode_open_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_open_confirm *open_conf)
1008{
1009 DECODE_HEAD;
1010
1011 if (argp->minorversion >= 1)
1012 return nfserr_notsupp;
1013
1014 status = nfsd4_decode_stateid(argp, &open_conf->oc_req_stateid);
1015 if (status)
1016 return status;
1017 READ_BUF(4);
1018 open_conf->oc_seqid = be32_to_cpup(p++);
1019
1020 DECODE_TAIL;
1021}
1022
1023static __be32
1024nfsd4_decode_open_downgrade(struct nfsd4_compoundargs *argp, struct nfsd4_open_downgrade *open_down)
1025{
1026 DECODE_HEAD;
1027
1028 status = nfsd4_decode_stateid(argp, &open_down->od_stateid);
1029 if (status)
1030 return status;
1031 READ_BUF(4);
1032 open_down->od_seqid = be32_to_cpup(p++);
1033 status = nfsd4_decode_share_access(argp, &open_down->od_share_access,
1034 &open_down->od_deleg_want, NULL);
1035 if (status)
1036 return status;
1037 status = nfsd4_decode_share_deny(argp, &open_down->od_share_deny);
1038 if (status)
1039 return status;
1040 DECODE_TAIL;
1041}
1042
1043static __be32
1044nfsd4_decode_putfh(struct nfsd4_compoundargs *argp, struct nfsd4_putfh *putfh)
1045{
1046 DECODE_HEAD;
1047
1048 READ_BUF(4);
1049 putfh->pf_fhlen = be32_to_cpup(p++);
1050 if (putfh->pf_fhlen > NFS4_FHSIZE)
1051 goto xdr_error;
1052 READ_BUF(putfh->pf_fhlen);
1053 SAVEMEM(putfh->pf_fhval, putfh->pf_fhlen);
1054
1055 DECODE_TAIL;
1056}
1057
1058static __be32
1059nfsd4_decode_putpubfh(struct nfsd4_compoundargs *argp, void *p)
1060{
1061 if (argp->minorversion == 0)
1062 return nfs_ok;
1063 return nfserr_notsupp;
1064}
1065
1066static __be32
1067nfsd4_decode_read(struct nfsd4_compoundargs *argp, struct nfsd4_read *read)
1068{
1069 DECODE_HEAD;
1070
1071 status = nfsd4_decode_stateid(argp, &read->rd_stateid);
1072 if (status)
1073 return status;
1074 READ_BUF(12);
1075 p = xdr_decode_hyper(p, &read->rd_offset);
1076 read->rd_length = be32_to_cpup(p++);
1077
1078 DECODE_TAIL;
1079}
1080
1081static __be32
1082nfsd4_decode_readdir(struct nfsd4_compoundargs *argp, struct nfsd4_readdir *readdir)
1083{
1084 DECODE_HEAD;
1085
1086 READ_BUF(24);
1087 p = xdr_decode_hyper(p, &readdir->rd_cookie);
1088 COPYMEM(readdir->rd_verf.data, sizeof(readdir->rd_verf.data));
1089 readdir->rd_dircount = be32_to_cpup(p++);
1090 readdir->rd_maxcount = be32_to_cpup(p++);
1091 if ((status = nfsd4_decode_bitmap(argp, readdir->rd_bmval)))
1092 goto out;
1093
1094 DECODE_TAIL;
1095}
1096
1097static __be32
1098nfsd4_decode_remove(struct nfsd4_compoundargs *argp, struct nfsd4_remove *remove)
1099{
1100 DECODE_HEAD;
1101
1102 READ_BUF(4);
1103 remove->rm_namelen = be32_to_cpup(p++);
1104 READ_BUF(remove->rm_namelen);
1105 SAVEMEM(remove->rm_name, remove->rm_namelen);
1106 if ((status = check_filename(remove->rm_name, remove->rm_namelen)))
1107 return status;
1108
1109 DECODE_TAIL;
1110}
1111
1112static __be32
1113nfsd4_decode_rename(struct nfsd4_compoundargs *argp, struct nfsd4_rename *rename)
1114{
1115 DECODE_HEAD;
1116
1117 READ_BUF(4);
1118 rename->rn_snamelen = be32_to_cpup(p++);
1119 READ_BUF(rename->rn_snamelen);
1120 SAVEMEM(rename->rn_sname, rename->rn_snamelen);
1121 READ_BUF(4);
1122 rename->rn_tnamelen = be32_to_cpup(p++);
1123 READ_BUF(rename->rn_tnamelen);
1124 SAVEMEM(rename->rn_tname, rename->rn_tnamelen);
1125 if ((status = check_filename(rename->rn_sname, rename->rn_snamelen)))
1126 return status;
1127 if ((status = check_filename(rename->rn_tname, rename->rn_tnamelen)))
1128 return status;
1129
1130 DECODE_TAIL;
1131}
1132
1133static __be32
1134nfsd4_decode_renew(struct nfsd4_compoundargs *argp, clientid_t *clientid)
1135{
1136 DECODE_HEAD;
1137
1138 if (argp->minorversion >= 1)
1139 return nfserr_notsupp;
1140
1141 READ_BUF(sizeof(clientid_t));
1142 COPYMEM(clientid, sizeof(clientid_t));
1143
1144 DECODE_TAIL;
1145}
1146
1147static __be32
1148nfsd4_decode_secinfo(struct nfsd4_compoundargs *argp,
1149 struct nfsd4_secinfo *secinfo)
1150{
1151 DECODE_HEAD;
1152
1153 READ_BUF(4);
1154 secinfo->si_namelen = be32_to_cpup(p++);
1155 READ_BUF(secinfo->si_namelen);
1156 SAVEMEM(secinfo->si_name, secinfo->si_namelen);
1157 status = check_filename(secinfo->si_name, secinfo->si_namelen);
1158 if (status)
1159 return status;
1160 DECODE_TAIL;
1161}
1162
1163static __be32
1164nfsd4_decode_secinfo_no_name(struct nfsd4_compoundargs *argp,
1165 struct nfsd4_secinfo_no_name *sin)
1166{
1167 DECODE_HEAD;
1168
1169 READ_BUF(4);
1170 sin->sin_style = be32_to_cpup(p++);
1171 DECODE_TAIL;
1172}
1173
1174static __be32
1175nfsd4_decode_setattr(struct nfsd4_compoundargs *argp, struct nfsd4_setattr *setattr)
1176{
1177 __be32 status;
1178
1179 status = nfsd4_decode_stateid(argp, &setattr->sa_stateid);
1180 if (status)
1181 return status;
1182 return nfsd4_decode_fattr(argp, setattr->sa_bmval, &setattr->sa_iattr,
1183 &setattr->sa_acl, &setattr->sa_label, NULL);
1184}
1185
1186static __be32
1187nfsd4_decode_setclientid(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid *setclientid)
1188{
1189 DECODE_HEAD;
1190
1191 if (argp->minorversion >= 1)
1192 return nfserr_notsupp;
1193
1194 READ_BUF(NFS4_VERIFIER_SIZE);
1195 COPYMEM(setclientid->se_verf.data, NFS4_VERIFIER_SIZE);
1196
1197 status = nfsd4_decode_opaque(argp, &setclientid->se_name);
1198 if (status)
1199 return nfserr_bad_xdr;
1200 READ_BUF(8);
1201 setclientid->se_callback_prog = be32_to_cpup(p++);
1202 setclientid->se_callback_netid_len = be32_to_cpup(p++);
1203 READ_BUF(setclientid->se_callback_netid_len);
1204 SAVEMEM(setclientid->se_callback_netid_val, setclientid->se_callback_netid_len);
1205 READ_BUF(4);
1206 setclientid->se_callback_addr_len = be32_to_cpup(p++);
1207
1208 READ_BUF(setclientid->se_callback_addr_len);
1209 SAVEMEM(setclientid->se_callback_addr_val, setclientid->se_callback_addr_len);
1210 READ_BUF(4);
1211 setclientid->se_callback_ident = be32_to_cpup(p++);
1212
1213 DECODE_TAIL;
1214}
1215
1216static __be32
1217nfsd4_decode_setclientid_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid_confirm *scd_c)
1218{
1219 DECODE_HEAD;
1220
1221 if (argp->minorversion >= 1)
1222 return nfserr_notsupp;
1223
1224 READ_BUF(8 + NFS4_VERIFIER_SIZE);
1225 COPYMEM(&scd_c->sc_clientid, 8);
1226 COPYMEM(&scd_c->sc_confirm, NFS4_VERIFIER_SIZE);
1227
1228 DECODE_TAIL;
1229}
1230
1231
1232static __be32
1233nfsd4_decode_verify(struct nfsd4_compoundargs *argp, struct nfsd4_verify *verify)
1234{
1235 DECODE_HEAD;
1236
1237 if ((status = nfsd4_decode_bitmap(argp, verify->ve_bmval)))
1238 goto out;
1239
1240
1241
1242
1243 READ_BUF(4);
1244 verify->ve_attrlen = be32_to_cpup(p++);
1245 READ_BUF(verify->ve_attrlen);
1246 SAVEMEM(verify->ve_attrval, verify->ve_attrlen);
1247
1248 DECODE_TAIL;
1249}
1250
1251static __be32
1252nfsd4_decode_write(struct nfsd4_compoundargs *argp, struct nfsd4_write *write)
1253{
1254 int avail;
1255 int len;
1256 DECODE_HEAD;
1257
1258 status = nfsd4_decode_stateid(argp, &write->wr_stateid);
1259 if (status)
1260 return status;
1261 READ_BUF(16);
1262 p = xdr_decode_hyper(p, &write->wr_offset);
1263 write->wr_stable_how = be32_to_cpup(p++);
1264 if (write->wr_stable_how > NFS_FILE_SYNC)
1265 goto xdr_error;
1266 write->wr_buflen = be32_to_cpup(p++);
1267
1268
1269
1270
1271
1272 avail = (char*)argp->end - (char*)argp->p;
1273 if (avail + argp->pagelen < write->wr_buflen) {
1274 dprintk("NFSD: xdr error (%s:%d)\n",
1275 __FILE__, __LINE__);
1276 goto xdr_error;
1277 }
1278 write->wr_head.iov_base = p;
1279 write->wr_head.iov_len = avail;
1280 write->wr_pagelist = argp->pagelist;
1281
1282 len = XDR_QUADLEN(write->wr_buflen) << 2;
1283 if (len >= avail) {
1284 int pages;
1285
1286 len -= avail;
1287
1288 pages = len >> PAGE_SHIFT;
1289 argp->pagelist += pages;
1290 argp->pagelen -= pages * PAGE_SIZE;
1291 len -= pages * PAGE_SIZE;
1292
1293 next_decode_page(argp);
1294 }
1295 argp->p += XDR_QUADLEN(len);
1296
1297 DECODE_TAIL;
1298}
1299
1300static __be32
1301nfsd4_decode_release_lockowner(struct nfsd4_compoundargs *argp, struct nfsd4_release_lockowner *rlockowner)
1302{
1303 DECODE_HEAD;
1304
1305 if (argp->minorversion >= 1)
1306 return nfserr_notsupp;
1307
1308 READ_BUF(12);
1309 COPYMEM(&rlockowner->rl_clientid, sizeof(clientid_t));
1310 rlockowner->rl_owner.len = be32_to_cpup(p++);
1311 READ_BUF(rlockowner->rl_owner.len);
1312 READMEM(rlockowner->rl_owner.data, rlockowner->rl_owner.len);
1313
1314 if (argp->minorversion && !zero_clientid(&rlockowner->rl_clientid))
1315 return nfserr_inval;
1316 DECODE_TAIL;
1317}
1318
1319static __be32
1320nfsd4_decode_exchange_id(struct nfsd4_compoundargs *argp,
1321 struct nfsd4_exchange_id *exid)
1322{
1323 int dummy, tmp;
1324 DECODE_HEAD;
1325
1326 READ_BUF(NFS4_VERIFIER_SIZE);
1327 COPYMEM(exid->verifier.data, NFS4_VERIFIER_SIZE);
1328
1329 status = nfsd4_decode_opaque(argp, &exid->clname);
1330 if (status)
1331 return nfserr_bad_xdr;
1332
1333 READ_BUF(4);
1334 exid->flags = be32_to_cpup(p++);
1335
1336
1337 READ_BUF(4);
1338 exid->spa_how = be32_to_cpup(p++);
1339 switch (exid->spa_how) {
1340 case SP4_NONE:
1341 break;
1342 case SP4_MACH_CRED:
1343
1344 status = nfsd4_decode_bitmap(argp,
1345 exid->spo_must_enforce);
1346 if (status)
1347 goto out;
1348
1349 status = nfsd4_decode_bitmap(argp, exid->spo_must_allow);
1350 if (status)
1351 goto out;
1352 break;
1353 case SP4_SSV:
1354
1355 READ_BUF(4);
1356 dummy = be32_to_cpup(p++);
1357 READ_BUF(dummy * 4);
1358 p += dummy;
1359
1360 READ_BUF(4);
1361 dummy = be32_to_cpup(p++);
1362 READ_BUF(dummy * 4);
1363 p += dummy;
1364
1365
1366 READ_BUF(4);
1367 tmp = be32_to_cpup(p++);
1368 while (tmp--) {
1369 READ_BUF(4);
1370 dummy = be32_to_cpup(p++);
1371 READ_BUF(dummy);
1372 p += XDR_QUADLEN(dummy);
1373 }
1374
1375
1376 READ_BUF(4);
1377 tmp = be32_to_cpup(p++);
1378 while (tmp--) {
1379 READ_BUF(4);
1380 dummy = be32_to_cpup(p++);
1381 READ_BUF(dummy);
1382 p += XDR_QUADLEN(dummy);
1383 }
1384
1385
1386 READ_BUF(8);
1387 break;
1388 default:
1389 goto xdr_error;
1390 }
1391
1392 READ_BUF(4);
1393 dummy = be32_to_cpup(p++);
1394
1395 if (dummy > 1)
1396 goto xdr_error;
1397
1398 if (dummy == 1) {
1399 status = nfsd4_decode_opaque(argp, &exid->nii_domain);
1400 if (status)
1401 goto xdr_error;
1402
1403
1404 status = nfsd4_decode_opaque(argp, &exid->nii_name);
1405 if (status)
1406 goto xdr_error;
1407
1408
1409 status = nfsd4_decode_time(argp, &exid->nii_time);
1410 if (status)
1411 goto xdr_error;
1412 }
1413 DECODE_TAIL;
1414}
1415
1416static __be32
1417nfsd4_decode_create_session(struct nfsd4_compoundargs *argp,
1418 struct nfsd4_create_session *sess)
1419{
1420 DECODE_HEAD;
1421 u32 dummy;
1422
1423 READ_BUF(16);
1424 COPYMEM(&sess->clientid, 8);
1425 sess->seqid = be32_to_cpup(p++);
1426 sess->flags = be32_to_cpup(p++);
1427
1428
1429 READ_BUF(28);
1430 dummy = be32_to_cpup(p++);
1431 sess->fore_channel.maxreq_sz = be32_to_cpup(p++);
1432 sess->fore_channel.maxresp_sz = be32_to_cpup(p++);
1433 sess->fore_channel.maxresp_cached = be32_to_cpup(p++);
1434 sess->fore_channel.maxops = be32_to_cpup(p++);
1435 sess->fore_channel.maxreqs = be32_to_cpup(p++);
1436 sess->fore_channel.nr_rdma_attrs = be32_to_cpup(p++);
1437 if (sess->fore_channel.nr_rdma_attrs == 1) {
1438 READ_BUF(4);
1439 sess->fore_channel.rdma_attrs = be32_to_cpup(p++);
1440 } else if (sess->fore_channel.nr_rdma_attrs > 1) {
1441 dprintk("Too many fore channel attr bitmaps!\n");
1442 goto xdr_error;
1443 }
1444
1445
1446 READ_BUF(28);
1447 dummy = be32_to_cpup(p++);
1448 sess->back_channel.maxreq_sz = be32_to_cpup(p++);
1449 sess->back_channel.maxresp_sz = be32_to_cpup(p++);
1450 sess->back_channel.maxresp_cached = be32_to_cpup(p++);
1451 sess->back_channel.maxops = be32_to_cpup(p++);
1452 sess->back_channel.maxreqs = be32_to_cpup(p++);
1453 sess->back_channel.nr_rdma_attrs = be32_to_cpup(p++);
1454 if (sess->back_channel.nr_rdma_attrs == 1) {
1455 READ_BUF(4);
1456 sess->back_channel.rdma_attrs = be32_to_cpup(p++);
1457 } else if (sess->back_channel.nr_rdma_attrs > 1) {
1458 dprintk("Too many back channel attr bitmaps!\n");
1459 goto xdr_error;
1460 }
1461
1462 READ_BUF(4);
1463 sess->callback_prog = be32_to_cpup(p++);
1464 nfsd4_decode_cb_sec(argp, &sess->cb_sec);
1465 DECODE_TAIL;
1466}
1467
1468static __be32
1469nfsd4_decode_destroy_session(struct nfsd4_compoundargs *argp,
1470 struct nfsd4_destroy_session *destroy_session)
1471{
1472 DECODE_HEAD;
1473 READ_BUF(NFS4_MAX_SESSIONID_LEN);
1474 COPYMEM(destroy_session->sessionid.data, NFS4_MAX_SESSIONID_LEN);
1475
1476 DECODE_TAIL;
1477}
1478
1479static __be32
1480nfsd4_decode_free_stateid(struct nfsd4_compoundargs *argp,
1481 struct nfsd4_free_stateid *free_stateid)
1482{
1483 DECODE_HEAD;
1484
1485 READ_BUF(sizeof(stateid_t));
1486 free_stateid->fr_stateid.si_generation = be32_to_cpup(p++);
1487 COPYMEM(&free_stateid->fr_stateid.si_opaque, sizeof(stateid_opaque_t));
1488
1489 DECODE_TAIL;
1490}
1491
1492static __be32
1493nfsd4_decode_sequence(struct nfsd4_compoundargs *argp,
1494 struct nfsd4_sequence *seq)
1495{
1496 DECODE_HEAD;
1497
1498 READ_BUF(NFS4_MAX_SESSIONID_LEN + 16);
1499 COPYMEM(seq->sessionid.data, NFS4_MAX_SESSIONID_LEN);
1500 seq->seqid = be32_to_cpup(p++);
1501 seq->slotid = be32_to_cpup(p++);
1502 seq->maxslots = be32_to_cpup(p++);
1503 seq->cachethis = be32_to_cpup(p++);
1504
1505 DECODE_TAIL;
1506}
1507
1508static __be32
1509nfsd4_decode_test_stateid(struct nfsd4_compoundargs *argp, struct nfsd4_test_stateid *test_stateid)
1510{
1511 int i;
1512 __be32 *p, status;
1513 struct nfsd4_test_stateid_id *stateid;
1514
1515 READ_BUF(4);
1516 test_stateid->ts_num_ids = ntohl(*p++);
1517
1518 INIT_LIST_HEAD(&test_stateid->ts_stateid_list);
1519
1520 for (i = 0; i < test_stateid->ts_num_ids; i++) {
1521 stateid = svcxdr_tmpalloc(argp, sizeof(*stateid));
1522 if (!stateid) {
1523 status = nfserrno(-ENOMEM);
1524 goto out;
1525 }
1526
1527 INIT_LIST_HEAD(&stateid->ts_id_list);
1528 list_add_tail(&stateid->ts_id_list, &test_stateid->ts_stateid_list);
1529
1530 status = nfsd4_decode_stateid(argp, &stateid->ts_id_stateid);
1531 if (status)
1532 goto out;
1533 }
1534
1535 status = 0;
1536out:
1537 return status;
1538xdr_error:
1539 dprintk("NFSD: xdr error (%s:%d)\n", __FILE__, __LINE__);
1540 status = nfserr_bad_xdr;
1541 goto out;
1542}
1543
1544static __be32 nfsd4_decode_destroy_clientid(struct nfsd4_compoundargs *argp, struct nfsd4_destroy_clientid *dc)
1545{
1546 DECODE_HEAD;
1547
1548 READ_BUF(8);
1549 COPYMEM(&dc->clientid, 8);
1550
1551 DECODE_TAIL;
1552}
1553
1554static __be32 nfsd4_decode_reclaim_complete(struct nfsd4_compoundargs *argp, struct nfsd4_reclaim_complete *rc)
1555{
1556 DECODE_HEAD;
1557
1558 READ_BUF(4);
1559 rc->rca_one_fs = be32_to_cpup(p++);
1560
1561 DECODE_TAIL;
1562}
1563
1564#ifdef CONFIG_NFSD_PNFS
1565static __be32
1566nfsd4_decode_getdeviceinfo(struct nfsd4_compoundargs *argp,
1567 struct nfsd4_getdeviceinfo *gdev)
1568{
1569 DECODE_HEAD;
1570 u32 num, i;
1571
1572 READ_BUF(sizeof(struct nfsd4_deviceid) + 3 * 4);
1573 COPYMEM(&gdev->gd_devid, sizeof(struct nfsd4_deviceid));
1574 gdev->gd_layout_type = be32_to_cpup(p++);
1575 gdev->gd_maxcount = be32_to_cpup(p++);
1576 num = be32_to_cpup(p++);
1577 if (num) {
1578 if (num > 1000)
1579 goto xdr_error;
1580 READ_BUF(4 * num);
1581 gdev->gd_notify_types = be32_to_cpup(p++);
1582 for (i = 1; i < num; i++) {
1583 if (be32_to_cpup(p++)) {
1584 status = nfserr_inval;
1585 goto out;
1586 }
1587 }
1588 }
1589 DECODE_TAIL;
1590}
1591
1592static __be32
1593nfsd4_decode_layoutget(struct nfsd4_compoundargs *argp,
1594 struct nfsd4_layoutget *lgp)
1595{
1596 DECODE_HEAD;
1597
1598 READ_BUF(36);
1599 lgp->lg_signal = be32_to_cpup(p++);
1600 lgp->lg_layout_type = be32_to_cpup(p++);
1601 lgp->lg_seg.iomode = be32_to_cpup(p++);
1602 p = xdr_decode_hyper(p, &lgp->lg_seg.offset);
1603 p = xdr_decode_hyper(p, &lgp->lg_seg.length);
1604 p = xdr_decode_hyper(p, &lgp->lg_minlength);
1605
1606 status = nfsd4_decode_stateid(argp, &lgp->lg_sid);
1607 if (status)
1608 return status;
1609
1610 READ_BUF(4);
1611 lgp->lg_maxcount = be32_to_cpup(p++);
1612
1613 DECODE_TAIL;
1614}
1615
1616static __be32
1617nfsd4_decode_layoutcommit(struct nfsd4_compoundargs *argp,
1618 struct nfsd4_layoutcommit *lcp)
1619{
1620 DECODE_HEAD;
1621 u32 timechange;
1622
1623 READ_BUF(20);
1624 p = xdr_decode_hyper(p, &lcp->lc_seg.offset);
1625 p = xdr_decode_hyper(p, &lcp->lc_seg.length);
1626 lcp->lc_reclaim = be32_to_cpup(p++);
1627
1628 status = nfsd4_decode_stateid(argp, &lcp->lc_sid);
1629 if (status)
1630 return status;
1631
1632 READ_BUF(4);
1633 lcp->lc_newoffset = be32_to_cpup(p++);
1634 if (lcp->lc_newoffset) {
1635 READ_BUF(8);
1636 p = xdr_decode_hyper(p, &lcp->lc_last_wr);
1637 } else
1638 lcp->lc_last_wr = 0;
1639 READ_BUF(4);
1640 timechange = be32_to_cpup(p++);
1641 if (timechange) {
1642 status = nfsd4_decode_time(argp, &lcp->lc_mtime);
1643 if (status)
1644 return status;
1645 } else {
1646 lcp->lc_mtime.tv_nsec = UTIME_NOW;
1647 }
1648 READ_BUF(8);
1649 lcp->lc_layout_type = be32_to_cpup(p++);
1650
1651
1652
1653
1654
1655 lcp->lc_up_len = be32_to_cpup(p++);
1656 if (lcp->lc_up_len > 0) {
1657 READ_BUF(lcp->lc_up_len);
1658 READMEM(lcp->lc_up_layout, lcp->lc_up_len);
1659 }
1660
1661 DECODE_TAIL;
1662}
1663
1664static __be32
1665nfsd4_decode_layoutreturn(struct nfsd4_compoundargs *argp,
1666 struct nfsd4_layoutreturn *lrp)
1667{
1668 DECODE_HEAD;
1669
1670 READ_BUF(16);
1671 lrp->lr_reclaim = be32_to_cpup(p++);
1672 lrp->lr_layout_type = be32_to_cpup(p++);
1673 lrp->lr_seg.iomode = be32_to_cpup(p++);
1674 lrp->lr_return_type = be32_to_cpup(p++);
1675 if (lrp->lr_return_type == RETURN_FILE) {
1676 READ_BUF(16);
1677 p = xdr_decode_hyper(p, &lrp->lr_seg.offset);
1678 p = xdr_decode_hyper(p, &lrp->lr_seg.length);
1679
1680 status = nfsd4_decode_stateid(argp, &lrp->lr_sid);
1681 if (status)
1682 return status;
1683
1684 READ_BUF(4);
1685 lrp->lrf_body_len = be32_to_cpup(p++);
1686 if (lrp->lrf_body_len > 0) {
1687 READ_BUF(lrp->lrf_body_len);
1688 READMEM(lrp->lrf_body, lrp->lrf_body_len);
1689 }
1690 } else {
1691 lrp->lr_seg.offset = 0;
1692 lrp->lr_seg.length = NFS4_MAX_UINT64;
1693 }
1694
1695 DECODE_TAIL;
1696}
1697#endif
1698
1699static __be32
1700nfsd4_decode_fallocate(struct nfsd4_compoundargs *argp,
1701 struct nfsd4_fallocate *fallocate)
1702{
1703 DECODE_HEAD;
1704
1705 status = nfsd4_decode_stateid(argp, &fallocate->falloc_stateid);
1706 if (status)
1707 return status;
1708
1709 READ_BUF(16);
1710 p = xdr_decode_hyper(p, &fallocate->falloc_offset);
1711 xdr_decode_hyper(p, &fallocate->falloc_length);
1712
1713 DECODE_TAIL;
1714}
1715
1716static __be32
1717nfsd4_decode_clone(struct nfsd4_compoundargs *argp, struct nfsd4_clone *clone)
1718{
1719 DECODE_HEAD;
1720
1721 status = nfsd4_decode_stateid(argp, &clone->cl_src_stateid);
1722 if (status)
1723 return status;
1724 status = nfsd4_decode_stateid(argp, &clone->cl_dst_stateid);
1725 if (status)
1726 return status;
1727
1728 READ_BUF(8 + 8 + 8);
1729 p = xdr_decode_hyper(p, &clone->cl_src_pos);
1730 p = xdr_decode_hyper(p, &clone->cl_dst_pos);
1731 p = xdr_decode_hyper(p, &clone->cl_count);
1732 DECODE_TAIL;
1733}
1734
1735static __be32
1736nfsd4_decode_copy(struct nfsd4_compoundargs *argp, struct nfsd4_copy *copy)
1737{
1738 DECODE_HEAD;
1739 unsigned int tmp;
1740
1741 status = nfsd4_decode_stateid(argp, ©->cp_src_stateid);
1742 if (status)
1743 return status;
1744 status = nfsd4_decode_stateid(argp, ©->cp_dst_stateid);
1745 if (status)
1746 return status;
1747
1748 READ_BUF(8 + 8 + 8 + 4 + 4 + 4);
1749 p = xdr_decode_hyper(p, ©->cp_src_pos);
1750 p = xdr_decode_hyper(p, ©->cp_dst_pos);
1751 p = xdr_decode_hyper(p, ©->cp_count);
1752 p++;
1753 copy->cp_synchronous = be32_to_cpup(p++);
1754 tmp = be32_to_cpup(p);
1755
1756 DECODE_TAIL;
1757}
1758
1759static __be32
1760nfsd4_decode_offload_status(struct nfsd4_compoundargs *argp,
1761 struct nfsd4_offload_status *os)
1762{
1763 return nfsd4_decode_stateid(argp, &os->stateid);
1764}
1765
1766static __be32
1767nfsd4_decode_seek(struct nfsd4_compoundargs *argp, struct nfsd4_seek *seek)
1768{
1769 DECODE_HEAD;
1770
1771 status = nfsd4_decode_stateid(argp, &seek->seek_stateid);
1772 if (status)
1773 return status;
1774
1775 READ_BUF(8 + 4);
1776 p = xdr_decode_hyper(p, &seek->seek_offset);
1777 seek->seek_whence = be32_to_cpup(p);
1778
1779 DECODE_TAIL;
1780}
1781
1782static __be32
1783nfsd4_decode_noop(struct nfsd4_compoundargs *argp, void *p)
1784{
1785 return nfs_ok;
1786}
1787
1788static __be32
1789nfsd4_decode_notsupp(struct nfsd4_compoundargs *argp, void *p)
1790{
1791 return nfserr_notsupp;
1792}
1793
1794typedef __be32(*nfsd4_dec)(struct nfsd4_compoundargs *argp, void *);
1795
1796static const nfsd4_dec nfsd4_dec_ops[] = {
1797 [OP_ACCESS] = (nfsd4_dec)nfsd4_decode_access,
1798 [OP_CLOSE] = (nfsd4_dec)nfsd4_decode_close,
1799 [OP_COMMIT] = (nfsd4_dec)nfsd4_decode_commit,
1800 [OP_CREATE] = (nfsd4_dec)nfsd4_decode_create,
1801 [OP_DELEGPURGE] = (nfsd4_dec)nfsd4_decode_notsupp,
1802 [OP_DELEGRETURN] = (nfsd4_dec)nfsd4_decode_delegreturn,
1803 [OP_GETATTR] = (nfsd4_dec)nfsd4_decode_getattr,
1804 [OP_GETFH] = (nfsd4_dec)nfsd4_decode_noop,
1805 [OP_LINK] = (nfsd4_dec)nfsd4_decode_link,
1806 [OP_LOCK] = (nfsd4_dec)nfsd4_decode_lock,
1807 [OP_LOCKT] = (nfsd4_dec)nfsd4_decode_lockt,
1808 [OP_LOCKU] = (nfsd4_dec)nfsd4_decode_locku,
1809 [OP_LOOKUP] = (nfsd4_dec)nfsd4_decode_lookup,
1810 [OP_LOOKUPP] = (nfsd4_dec)nfsd4_decode_noop,
1811 [OP_NVERIFY] = (nfsd4_dec)nfsd4_decode_verify,
1812 [OP_OPEN] = (nfsd4_dec)nfsd4_decode_open,
1813 [OP_OPENATTR] = (nfsd4_dec)nfsd4_decode_notsupp,
1814 [OP_OPEN_CONFIRM] = (nfsd4_dec)nfsd4_decode_open_confirm,
1815 [OP_OPEN_DOWNGRADE] = (nfsd4_dec)nfsd4_decode_open_downgrade,
1816 [OP_PUTFH] = (nfsd4_dec)nfsd4_decode_putfh,
1817 [OP_PUTPUBFH] = (nfsd4_dec)nfsd4_decode_putpubfh,
1818 [OP_PUTROOTFH] = (nfsd4_dec)nfsd4_decode_noop,
1819 [OP_READ] = (nfsd4_dec)nfsd4_decode_read,
1820 [OP_READDIR] = (nfsd4_dec)nfsd4_decode_readdir,
1821 [OP_READLINK] = (nfsd4_dec)nfsd4_decode_noop,
1822 [OP_REMOVE] = (nfsd4_dec)nfsd4_decode_remove,
1823 [OP_RENAME] = (nfsd4_dec)nfsd4_decode_rename,
1824 [OP_RENEW] = (nfsd4_dec)nfsd4_decode_renew,
1825 [OP_RESTOREFH] = (nfsd4_dec)nfsd4_decode_noop,
1826 [OP_SAVEFH] = (nfsd4_dec)nfsd4_decode_noop,
1827 [OP_SECINFO] = (nfsd4_dec)nfsd4_decode_secinfo,
1828 [OP_SETATTR] = (nfsd4_dec)nfsd4_decode_setattr,
1829 [OP_SETCLIENTID] = (nfsd4_dec)nfsd4_decode_setclientid,
1830 [OP_SETCLIENTID_CONFIRM] = (nfsd4_dec)nfsd4_decode_setclientid_confirm,
1831 [OP_VERIFY] = (nfsd4_dec)nfsd4_decode_verify,
1832 [OP_WRITE] = (nfsd4_dec)nfsd4_decode_write,
1833 [OP_RELEASE_LOCKOWNER] = (nfsd4_dec)nfsd4_decode_release_lockowner,
1834
1835
1836 [OP_BACKCHANNEL_CTL] = (nfsd4_dec)nfsd4_decode_backchannel_ctl,
1837 [OP_BIND_CONN_TO_SESSION]= (nfsd4_dec)nfsd4_decode_bind_conn_to_session,
1838 [OP_EXCHANGE_ID] = (nfsd4_dec)nfsd4_decode_exchange_id,
1839 [OP_CREATE_SESSION] = (nfsd4_dec)nfsd4_decode_create_session,
1840 [OP_DESTROY_SESSION] = (nfsd4_dec)nfsd4_decode_destroy_session,
1841 [OP_FREE_STATEID] = (nfsd4_dec)nfsd4_decode_free_stateid,
1842 [OP_GET_DIR_DELEGATION] = (nfsd4_dec)nfsd4_decode_notsupp,
1843#ifdef CONFIG_NFSD_PNFS
1844 [OP_GETDEVICEINFO] = (nfsd4_dec)nfsd4_decode_getdeviceinfo,
1845 [OP_GETDEVICELIST] = (nfsd4_dec)nfsd4_decode_notsupp,
1846 [OP_LAYOUTCOMMIT] = (nfsd4_dec)nfsd4_decode_layoutcommit,
1847 [OP_LAYOUTGET] = (nfsd4_dec)nfsd4_decode_layoutget,
1848 [OP_LAYOUTRETURN] = (nfsd4_dec)nfsd4_decode_layoutreturn,
1849#else
1850 [OP_GETDEVICEINFO] = (nfsd4_dec)nfsd4_decode_notsupp,
1851 [OP_GETDEVICELIST] = (nfsd4_dec)nfsd4_decode_notsupp,
1852 [OP_LAYOUTCOMMIT] = (nfsd4_dec)nfsd4_decode_notsupp,
1853 [OP_LAYOUTGET] = (nfsd4_dec)nfsd4_decode_notsupp,
1854 [OP_LAYOUTRETURN] = (nfsd4_dec)nfsd4_decode_notsupp,
1855#endif
1856 [OP_SECINFO_NO_NAME] = (nfsd4_dec)nfsd4_decode_secinfo_no_name,
1857 [OP_SEQUENCE] = (nfsd4_dec)nfsd4_decode_sequence,
1858 [OP_SET_SSV] = (nfsd4_dec)nfsd4_decode_notsupp,
1859 [OP_TEST_STATEID] = (nfsd4_dec)nfsd4_decode_test_stateid,
1860 [OP_WANT_DELEGATION] = (nfsd4_dec)nfsd4_decode_notsupp,
1861 [OP_DESTROY_CLIENTID] = (nfsd4_dec)nfsd4_decode_destroy_clientid,
1862 [OP_RECLAIM_COMPLETE] = (nfsd4_dec)nfsd4_decode_reclaim_complete,
1863
1864
1865 [OP_ALLOCATE] = (nfsd4_dec)nfsd4_decode_fallocate,
1866 [OP_COPY] = (nfsd4_dec)nfsd4_decode_copy,
1867 [OP_COPY_NOTIFY] = (nfsd4_dec)nfsd4_decode_notsupp,
1868 [OP_DEALLOCATE] = (nfsd4_dec)nfsd4_decode_fallocate,
1869 [OP_IO_ADVISE] = (nfsd4_dec)nfsd4_decode_notsupp,
1870 [OP_LAYOUTERROR] = (nfsd4_dec)nfsd4_decode_notsupp,
1871 [OP_LAYOUTSTATS] = (nfsd4_dec)nfsd4_decode_notsupp,
1872 [OP_OFFLOAD_CANCEL] = (nfsd4_dec)nfsd4_decode_offload_status,
1873 [OP_OFFLOAD_STATUS] = (nfsd4_dec)nfsd4_decode_offload_status,
1874 [OP_READ_PLUS] = (nfsd4_dec)nfsd4_decode_notsupp,
1875 [OP_SEEK] = (nfsd4_dec)nfsd4_decode_seek,
1876 [OP_WRITE_SAME] = (nfsd4_dec)nfsd4_decode_notsupp,
1877 [OP_CLONE] = (nfsd4_dec)nfsd4_decode_clone,
1878};
1879
1880static inline bool
1881nfsd4_opnum_in_range(struct nfsd4_compoundargs *argp, struct nfsd4_op *op)
1882{
1883 if (op->opnum < FIRST_NFS4_OP)
1884 return false;
1885 else if (argp->minorversion == 0 && op->opnum > LAST_NFS40_OP)
1886 return false;
1887 else if (argp->minorversion == 1 && op->opnum > LAST_NFS41_OP)
1888 return false;
1889 else if (argp->minorversion == 2 && op->opnum > LAST_NFS42_OP)
1890 return false;
1891 return true;
1892}
1893
1894static __be32
1895nfsd4_decode_compound(struct nfsd4_compoundargs *argp)
1896{
1897 DECODE_HEAD;
1898 struct nfsd4_op *op;
1899 bool cachethis = false;
1900 int auth_slack= argp->rqstp->rq_auth_slack;
1901 int max_reply = auth_slack + 8;
1902 int readcount = 0;
1903 int readbytes = 0;
1904 int i;
1905
1906 READ_BUF(4);
1907 argp->taglen = be32_to_cpup(p++);
1908 READ_BUF(argp->taglen);
1909 SAVEMEM(argp->tag, argp->taglen);
1910 READ_BUF(8);
1911 argp->minorversion = be32_to_cpup(p++);
1912 argp->opcnt = be32_to_cpup(p++);
1913 max_reply += 4 + (XDR_QUADLEN(argp->taglen) << 2);
1914
1915 if (argp->taglen > NFSD4_MAX_TAGLEN)
1916 goto xdr_error;
1917
1918
1919
1920
1921
1922 if (argp->opcnt > NFSD_MAX_OPS_PER_COMPOUND)
1923 return 0;
1924
1925 if (argp->opcnt > ARRAY_SIZE(argp->iops)) {
1926 argp->ops = kzalloc(argp->opcnt * sizeof(*argp->ops), GFP_KERNEL);
1927 if (!argp->ops) {
1928 argp->ops = argp->iops;
1929 dprintk("nfsd: couldn't allocate room for COMPOUND\n");
1930 goto xdr_error;
1931 }
1932 }
1933
1934 if (argp->minorversion > NFSD_SUPPORTED_MINOR_VERSION)
1935 argp->opcnt = 0;
1936
1937 for (i = 0; i < argp->opcnt; i++) {
1938 op = &argp->ops[i];
1939 op->replay = NULL;
1940
1941 READ_BUF(4);
1942 op->opnum = be32_to_cpup(p++);
1943
1944 if (nfsd4_opnum_in_range(argp, op))
1945 op->status = nfsd4_dec_ops[op->opnum](argp, &op->u);
1946 else {
1947 op->opnum = OP_ILLEGAL;
1948 op->status = nfserr_op_illegal;
1949 }
1950 op->opdesc = OPDESC(op);
1951
1952
1953
1954
1955 cachethis |= nfsd4_cache_this_op(op);
1956
1957 if (op->opnum == OP_READ) {
1958 readcount++;
1959 readbytes += nfsd4_max_reply(argp->rqstp, op);
1960 } else
1961 max_reply += nfsd4_max_reply(argp->rqstp, op);
1962
1963
1964
1965
1966
1967
1968 if (op->opnum == OP_LOCK || op->opnum == OP_LOCKT)
1969 max_reply += NFS4_OPAQUE_LIMIT;
1970
1971 if (op->status) {
1972 argp->opcnt = i+1;
1973 break;
1974 }
1975 }
1976
1977 if (argp->minorversion)
1978 cachethis = false;
1979 svc_reserve(argp->rqstp, max_reply + readbytes);
1980 argp->rqstp->rq_cachetype = cachethis ? RC_REPLBUFF : RC_NOCACHE;
1981
1982 if (readcount > 1 || max_reply > PAGE_SIZE - auth_slack)
1983 clear_bit(RQ_SPLICE_OK, &argp->rqstp->rq_flags);
1984
1985 DECODE_TAIL;
1986}
1987
1988static __be32 *encode_change(__be32 *p, struct kstat *stat, struct inode *inode,
1989 struct svc_export *exp)
1990{
1991 if (exp->ex_flags & NFSEXP_V4ROOT) {
1992 *p++ = cpu_to_be32(convert_to_wallclock(exp->cd->flush_time));
1993 *p++ = 0;
1994 } else if (IS_I_VERSION(inode)) {
1995 p = xdr_encode_hyper(p, nfsd4_change_attribute(stat, inode));
1996 } else {
1997 *p++ = cpu_to_be32(stat->ctime.tv_sec);
1998 *p++ = cpu_to_be32(stat->ctime.tv_nsec);
1999 }
2000 return p;
2001}
2002
2003
2004
2005
2006
2007
2008
2009
2010
2011
2012
2013
2014static __be32 *encode_time_delta(__be32 *p, struct inode *inode)
2015{
2016 struct timespec ts;
2017 u32 ns;
2018
2019 ns = max_t(u32, NSEC_PER_SEC/HZ, inode->i_sb->s_time_gran);
2020 ts = ns_to_timespec(ns);
2021
2022 p = xdr_encode_hyper(p, ts.tv_sec);
2023 *p++ = cpu_to_be32(ts.tv_nsec);
2024
2025 return p;
2026}
2027
2028static __be32 *encode_cinfo(__be32 *p, struct nfsd4_change_info *c)
2029{
2030 *p++ = cpu_to_be32(c->atomic);
2031 if (c->change_supported) {
2032 p = xdr_encode_hyper(p, c->before_change);
2033 p = xdr_encode_hyper(p, c->after_change);
2034 } else {
2035 *p++ = cpu_to_be32(c->before_ctime_sec);
2036 *p++ = cpu_to_be32(c->before_ctime_nsec);
2037 *p++ = cpu_to_be32(c->after_ctime_sec);
2038 *p++ = cpu_to_be32(c->after_ctime_nsec);
2039 }
2040 return p;
2041}
2042
2043
2044
2045
2046static __be32 nfsd4_encode_components_esc(struct xdr_stream *xdr, char sep,
2047 char *components, char esc_enter,
2048 char esc_exit)
2049{
2050 __be32 *p;
2051 __be32 pathlen;
2052 int pathlen_offset;
2053 int strlen, count=0;
2054 char *str, *end, *next;
2055
2056 dprintk("nfsd4_encode_components(%s)\n", components);
2057
2058 pathlen_offset = xdr->buf->len;
2059 p = xdr_reserve_space(xdr, 4);
2060 if (!p)
2061 return nfserr_resource;
2062 p++;
2063
2064 end = str = components;
2065 while (*end) {
2066 bool found_esc = false;
2067
2068
2069 if (*str == esc_enter) {
2070 for (; *end && (*end != esc_exit); end++)
2071 ;
2072 next = end + 1;
2073 if (*end && (!*next || *next == sep)) {
2074 str++;
2075 found_esc = true;
2076 }
2077 }
2078
2079 if (!found_esc)
2080 for (; *end && (*end != sep); end++)
2081 ;
2082
2083 strlen = end - str;
2084 if (strlen) {
2085 p = xdr_reserve_space(xdr, strlen + 4);
2086 if (!p)
2087 return nfserr_resource;
2088 p = xdr_encode_opaque(p, str, strlen);
2089 count++;
2090 }
2091 else
2092 end++;
2093 if (found_esc)
2094 end = next;
2095
2096 str = end;
2097 }
2098 pathlen = htonl(count);
2099 write_bytes_to_xdr_buf(xdr->buf, pathlen_offset, &pathlen, 4);
2100 return 0;
2101}
2102
2103
2104
2105
2106static __be32 nfsd4_encode_components(struct xdr_stream *xdr, char sep,
2107 char *components)
2108{
2109 return nfsd4_encode_components_esc(xdr, sep, components, 0, 0);
2110}
2111
2112
2113
2114
2115static __be32 nfsd4_encode_fs_location4(struct xdr_stream *xdr,
2116 struct nfsd4_fs_location *location)
2117{
2118 __be32 status;
2119
2120 status = nfsd4_encode_components_esc(xdr, ':', location->hosts,
2121 '[', ']');
2122 if (status)
2123 return status;
2124 status = nfsd4_encode_components(xdr, '/', location->path);
2125 if (status)
2126 return status;
2127 return 0;
2128}
2129
2130
2131
2132
2133static __be32 nfsd4_encode_path(struct xdr_stream *xdr,
2134 const struct path *root,
2135 const struct path *path)
2136{
2137 struct path cur = *path;
2138 __be32 *p;
2139 struct dentry **components = NULL;
2140 unsigned int ncomponents = 0;
2141 __be32 err = nfserr_jukebox;
2142
2143 dprintk("nfsd4_encode_components(");
2144
2145 path_get(&cur);
2146
2147
2148
2149 for (;;) {
2150 if (path_equal(&cur, root))
2151 break;
2152 if (cur.dentry == cur.mnt->mnt_root) {
2153 if (follow_up(&cur))
2154 continue;
2155 goto out_free;
2156 }
2157 if ((ncomponents & 15) == 0) {
2158 struct dentry **new;
2159 new = krealloc(components,
2160 sizeof(*new) * (ncomponents + 16),
2161 GFP_KERNEL);
2162 if (!new)
2163 goto out_free;
2164 components = new;
2165 }
2166 components[ncomponents++] = cur.dentry;
2167 cur.dentry = dget_parent(cur.dentry);
2168 }
2169 err = nfserr_resource;
2170 p = xdr_reserve_space(xdr, 4);
2171 if (!p)
2172 goto out_free;
2173 *p++ = cpu_to_be32(ncomponents);
2174
2175 while (ncomponents) {
2176 struct dentry *dentry = components[ncomponents - 1];
2177 unsigned int len;
2178
2179 spin_lock(&dentry->d_lock);
2180 len = dentry->d_name.len;
2181 p = xdr_reserve_space(xdr, len + 4);
2182 if (!p) {
2183 spin_unlock(&dentry->d_lock);
2184 goto out_free;
2185 }
2186 p = xdr_encode_opaque(p, dentry->d_name.name, len);
2187 dprintk("/%pd", dentry);
2188 spin_unlock(&dentry->d_lock);
2189 dput(dentry);
2190 ncomponents--;
2191 }
2192
2193 err = 0;
2194out_free:
2195 dprintk(")\n");
2196 while (ncomponents)
2197 dput(components[--ncomponents]);
2198 kfree(components);
2199 path_put(&cur);
2200 return err;
2201}
2202
2203static __be32 nfsd4_encode_fsloc_fsroot(struct xdr_stream *xdr,
2204 struct svc_rqst *rqstp, const struct path *path)
2205{
2206 struct svc_export *exp_ps;
2207 __be32 res;
2208
2209 exp_ps = rqst_find_fsidzero_export(rqstp);
2210 if (IS_ERR(exp_ps))
2211 return nfserrno(PTR_ERR(exp_ps));
2212 res = nfsd4_encode_path(xdr, &exp_ps->ex_path, path);
2213 exp_put(exp_ps);
2214 return res;
2215}
2216
2217
2218
2219
2220static __be32 nfsd4_encode_fs_locations(struct xdr_stream *xdr,
2221 struct svc_rqst *rqstp, struct svc_export *exp)
2222{
2223 __be32 status;
2224 int i;
2225 __be32 *p;
2226 struct nfsd4_fs_locations *fslocs = &exp->ex_fslocs;
2227
2228 status = nfsd4_encode_fsloc_fsroot(xdr, rqstp, &exp->ex_path);
2229 if (status)
2230 return status;
2231 p = xdr_reserve_space(xdr, 4);
2232 if (!p)
2233 return nfserr_resource;
2234 *p++ = cpu_to_be32(fslocs->locations_count);
2235 for (i=0; i<fslocs->locations_count; i++) {
2236 status = nfsd4_encode_fs_location4(xdr, &fslocs->locations[i]);
2237 if (status)
2238 return status;
2239 }
2240 return 0;
2241}
2242
2243static u32 nfs4_file_type(umode_t mode)
2244{
2245 switch (mode & S_IFMT) {
2246 case S_IFIFO: return NF4FIFO;
2247 case S_IFCHR: return NF4CHR;
2248 case S_IFDIR: return NF4DIR;
2249 case S_IFBLK: return NF4BLK;
2250 case S_IFLNK: return NF4LNK;
2251 case S_IFREG: return NF4REG;
2252 case S_IFSOCK: return NF4SOCK;
2253 default: return NF4BAD;
2254 };
2255}
2256
2257static inline __be32
2258nfsd4_encode_aclname(struct xdr_stream *xdr, struct svc_rqst *rqstp,
2259 struct nfs4_ace *ace)
2260{
2261 if (ace->whotype != NFS4_ACL_WHO_NAMED)
2262 return nfs4_acl_write_who(xdr, ace->whotype);
2263 else if (ace->flag & NFS4_ACE_IDENTIFIER_GROUP)
2264 return nfsd4_encode_group(xdr, rqstp, ace->who_gid);
2265 else
2266 return nfsd4_encode_user(xdr, rqstp, ace->who_uid);
2267}
2268
2269static inline __be32
2270nfsd4_encode_layout_types(struct xdr_stream *xdr, u32 layout_types)
2271{
2272 __be32 *p;
2273 unsigned long i = hweight_long(layout_types);
2274
2275 p = xdr_reserve_space(xdr, 4 + 4 * i);
2276 if (!p)
2277 return nfserr_resource;
2278
2279 *p++ = cpu_to_be32(i);
2280
2281 for (i = LAYOUT_NFSV4_1_FILES; i < LAYOUT_TYPE_MAX; ++i)
2282 if (layout_types & (1 << i))
2283 *p++ = cpu_to_be32(i);
2284
2285 return 0;
2286}
2287
2288#define WORD0_ABSENT_FS_ATTRS (FATTR4_WORD0_FS_LOCATIONS | FATTR4_WORD0_FSID | \
2289 FATTR4_WORD0_RDATTR_ERROR)
2290#define WORD1_ABSENT_FS_ATTRS FATTR4_WORD1_MOUNTED_ON_FILEID
2291#define WORD2_ABSENT_FS_ATTRS 0
2292
2293#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
2294static inline __be32
2295nfsd4_encode_security_label(struct xdr_stream *xdr, struct svc_rqst *rqstp,
2296 void *context, int len)
2297{
2298 __be32 *p;
2299
2300 p = xdr_reserve_space(xdr, len + 4 + 4 + 4);
2301 if (!p)
2302 return nfserr_resource;
2303
2304
2305
2306
2307
2308 *p++ = cpu_to_be32(0);
2309 *p++ = cpu_to_be32(0);
2310 p = xdr_encode_opaque(p, context, len);
2311 return 0;
2312}
2313#else
2314static inline __be32
2315nfsd4_encode_security_label(struct xdr_stream *xdr, struct svc_rqst *rqstp,
2316 void *context, int len)
2317{ return 0; }
2318#endif
2319
2320static __be32 fattr_handle_absent_fs(u32 *bmval0, u32 *bmval1, u32 *bmval2, u32 *rdattr_err)
2321{
2322
2323 if (*bmval0 & ~WORD0_ABSENT_FS_ATTRS ||
2324 *bmval1 & ~WORD1_ABSENT_FS_ATTRS) {
2325 if (*bmval0 & FATTR4_WORD0_RDATTR_ERROR ||
2326 *bmval0 & FATTR4_WORD0_FS_LOCATIONS)
2327 *rdattr_err = NFSERR_MOVED;
2328 else
2329 return nfserr_moved;
2330 }
2331 *bmval0 &= WORD0_ABSENT_FS_ATTRS;
2332 *bmval1 &= WORD1_ABSENT_FS_ATTRS;
2333 *bmval2 &= WORD2_ABSENT_FS_ATTRS;
2334 return 0;
2335}
2336
2337
2338static int get_parent_attributes(struct svc_export *exp, struct kstat *stat)
2339{
2340 struct path path = exp->ex_path;
2341 int err;
2342
2343 path_get(&path);
2344 while (follow_up(&path)) {
2345 if (path.dentry != path.mnt->mnt_root)
2346 break;
2347 }
2348 err = vfs_getattr(&path, stat, STATX_BASIC_STATS, AT_STATX_SYNC_AS_STAT);
2349 path_put(&path);
2350 return err;
2351}
2352
2353static __be32
2354nfsd4_encode_bitmap(struct xdr_stream *xdr, u32 bmval0, u32 bmval1, u32 bmval2)
2355{
2356 __be32 *p;
2357
2358 if (bmval2) {
2359 p = xdr_reserve_space(xdr, 16);
2360 if (!p)
2361 goto out_resource;
2362 *p++ = cpu_to_be32(3);
2363 *p++ = cpu_to_be32(bmval0);
2364 *p++ = cpu_to_be32(bmval1);
2365 *p++ = cpu_to_be32(bmval2);
2366 } else if (bmval1) {
2367 p = xdr_reserve_space(xdr, 12);
2368 if (!p)
2369 goto out_resource;
2370 *p++ = cpu_to_be32(2);
2371 *p++ = cpu_to_be32(bmval0);
2372 *p++ = cpu_to_be32(bmval1);
2373 } else {
2374 p = xdr_reserve_space(xdr, 8);
2375 if (!p)
2376 goto out_resource;
2377 *p++ = cpu_to_be32(1);
2378 *p++ = cpu_to_be32(bmval0);
2379 }
2380
2381 return 0;
2382out_resource:
2383 return nfserr_resource;
2384}
2385
2386
2387
2388
2389
2390static __be32
2391nfsd4_encode_fattr(struct xdr_stream *xdr, struct svc_fh *fhp,
2392 struct svc_export *exp,
2393 struct dentry *dentry, u32 *bmval,
2394 struct svc_rqst *rqstp, int ignore_crossmnt)
2395{
2396 u32 bmval0 = bmval[0];
2397 u32 bmval1 = bmval[1];
2398 u32 bmval2 = bmval[2];
2399 struct kstat stat;
2400 struct svc_fh *tempfh = NULL;
2401 struct kstatfs statfs;
2402 __be32 *p;
2403 int starting_len = xdr->buf->len;
2404 int attrlen_offset;
2405 __be32 attrlen;
2406 u32 dummy;
2407 u64 dummy64;
2408 u32 rdattr_err = 0;
2409 __be32 status;
2410 int err;
2411 struct nfs4_acl *acl = NULL;
2412#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
2413 void *context = NULL;
2414 int contextlen;
2415#endif
2416 bool contextsupport = false;
2417 struct nfsd4_compoundres *resp = rqstp->rq_resp;
2418 u32 minorversion = resp->cstate.minorversion;
2419 struct path path = {
2420 .mnt = exp->ex_path.mnt,
2421 .dentry = dentry,
2422 };
2423 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
2424
2425 BUG_ON(bmval1 & NFSD_WRITEONLY_ATTRS_WORD1);
2426 BUG_ON(!nfsd_attrs_supported(minorversion, bmval));
2427
2428 if (exp->ex_fslocs.migrated) {
2429 status = fattr_handle_absent_fs(&bmval0, &bmval1, &bmval2, &rdattr_err);
2430 if (status)
2431 goto out;
2432 }
2433
2434 err = vfs_getattr(&path, &stat, STATX_BASIC_STATS, AT_STATX_SYNC_AS_STAT);
2435 if (err)
2436 goto out_nfserr;
2437 if ((bmval0 & (FATTR4_WORD0_FILES_AVAIL | FATTR4_WORD0_FILES_FREE |
2438 FATTR4_WORD0_FILES_TOTAL | FATTR4_WORD0_MAXNAME)) ||
2439 (bmval1 & (FATTR4_WORD1_SPACE_AVAIL | FATTR4_WORD1_SPACE_FREE |
2440 FATTR4_WORD1_SPACE_TOTAL))) {
2441 err = vfs_statfs(&path, &statfs);
2442 if (err)
2443 goto out_nfserr;
2444 }
2445 if ((bmval0 & (FATTR4_WORD0_FILEHANDLE | FATTR4_WORD0_FSID)) && !fhp) {
2446 tempfh = kmalloc(sizeof(struct svc_fh), GFP_KERNEL);
2447 status = nfserr_jukebox;
2448 if (!tempfh)
2449 goto out;
2450 fh_init(tempfh, NFS4_FHSIZE);
2451 status = fh_compose(tempfh, exp, dentry, NULL);
2452 if (status)
2453 goto out;
2454 fhp = tempfh;
2455 }
2456 if (bmval0 & FATTR4_WORD0_ACL) {
2457 err = nfsd4_get_nfs4_acl(rqstp, dentry, &acl);
2458 if (err == -EOPNOTSUPP)
2459 bmval0 &= ~FATTR4_WORD0_ACL;
2460 else if (err == -EINVAL) {
2461 status = nfserr_attrnotsupp;
2462 goto out;
2463 } else if (err != 0)
2464 goto out_nfserr;
2465 }
2466
2467#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
2468 if ((bmval2 & FATTR4_WORD2_SECURITY_LABEL) ||
2469 bmval0 & FATTR4_WORD0_SUPPORTED_ATTRS) {
2470 if (exp->ex_flags & NFSEXP_SECURITY_LABEL)
2471 err = security_inode_getsecctx(d_inode(dentry),
2472 &context, &contextlen);
2473 else
2474 err = -EOPNOTSUPP;
2475 contextsupport = (err == 0);
2476 if (bmval2 & FATTR4_WORD2_SECURITY_LABEL) {
2477 if (err == -EOPNOTSUPP)
2478 bmval2 &= ~FATTR4_WORD2_SECURITY_LABEL;
2479 else if (err)
2480 goto out_nfserr;
2481 }
2482 }
2483#endif
2484
2485 status = nfsd4_encode_bitmap(xdr, bmval0, bmval1, bmval2);
2486 if (status)
2487 goto out;
2488
2489 attrlen_offset = xdr->buf->len;
2490 p = xdr_reserve_space(xdr, 4);
2491 if (!p)
2492 goto out_resource;
2493 p++;
2494
2495 if (bmval0 & FATTR4_WORD0_SUPPORTED_ATTRS) {
2496 u32 supp[3];
2497
2498 memcpy(supp, nfsd_suppattrs[minorversion], sizeof(supp));
2499
2500 if (!IS_POSIXACL(dentry->d_inode))
2501 supp[0] &= ~FATTR4_WORD0_ACL;
2502 if (!contextsupport)
2503 supp[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
2504 if (!supp[2]) {
2505 p = xdr_reserve_space(xdr, 12);
2506 if (!p)
2507 goto out_resource;
2508 *p++ = cpu_to_be32(2);
2509 *p++ = cpu_to_be32(supp[0]);
2510 *p++ = cpu_to_be32(supp[1]);
2511 } else {
2512 p = xdr_reserve_space(xdr, 16);
2513 if (!p)
2514 goto out_resource;
2515 *p++ = cpu_to_be32(3);
2516 *p++ = cpu_to_be32(supp[0]);
2517 *p++ = cpu_to_be32(supp[1]);
2518 *p++ = cpu_to_be32(supp[2]);
2519 }
2520 }
2521 if (bmval0 & FATTR4_WORD0_TYPE) {
2522 p = xdr_reserve_space(xdr, 4);
2523 if (!p)
2524 goto out_resource;
2525 dummy = nfs4_file_type(stat.mode);
2526 if (dummy == NF4BAD) {
2527 status = nfserr_serverfault;
2528 goto out;
2529 }
2530 *p++ = cpu_to_be32(dummy);
2531 }
2532 if (bmval0 & FATTR4_WORD0_FH_EXPIRE_TYPE) {
2533 p = xdr_reserve_space(xdr, 4);
2534 if (!p)
2535 goto out_resource;
2536 if (exp->ex_flags & NFSEXP_NOSUBTREECHECK)
2537 *p++ = cpu_to_be32(NFS4_FH_PERSISTENT);
2538 else
2539 *p++ = cpu_to_be32(NFS4_FH_PERSISTENT|
2540 NFS4_FH_VOL_RENAME);
2541 }
2542 if (bmval0 & FATTR4_WORD0_CHANGE) {
2543 p = xdr_reserve_space(xdr, 8);
2544 if (!p)
2545 goto out_resource;
2546 p = encode_change(p, &stat, d_inode(dentry), exp);
2547 }
2548 if (bmval0 & FATTR4_WORD0_SIZE) {
2549 p = xdr_reserve_space(xdr, 8);
2550 if (!p)
2551 goto out_resource;
2552 p = xdr_encode_hyper(p, stat.size);
2553 }
2554 if (bmval0 & FATTR4_WORD0_LINK_SUPPORT) {
2555 p = xdr_reserve_space(xdr, 4);
2556 if (!p)
2557 goto out_resource;
2558 *p++ = cpu_to_be32(1);
2559 }
2560 if (bmval0 & FATTR4_WORD0_SYMLINK_SUPPORT) {
2561 p = xdr_reserve_space(xdr, 4);
2562 if (!p)
2563 goto out_resource;
2564 *p++ = cpu_to_be32(1);
2565 }
2566 if (bmval0 & FATTR4_WORD0_NAMED_ATTR) {
2567 p = xdr_reserve_space(xdr, 4);
2568 if (!p)
2569 goto out_resource;
2570 *p++ = cpu_to_be32(0);
2571 }
2572 if (bmval0 & FATTR4_WORD0_FSID) {
2573 p = xdr_reserve_space(xdr, 16);
2574 if (!p)
2575 goto out_resource;
2576 if (exp->ex_fslocs.migrated) {
2577 p = xdr_encode_hyper(p, NFS4_REFERRAL_FSID_MAJOR);
2578 p = xdr_encode_hyper(p, NFS4_REFERRAL_FSID_MINOR);
2579 } else switch(fsid_source(fhp)) {
2580 case FSIDSOURCE_FSID:
2581 p = xdr_encode_hyper(p, (u64)exp->ex_fsid);
2582 p = xdr_encode_hyper(p, (u64)0);
2583 break;
2584 case FSIDSOURCE_DEV:
2585 *p++ = cpu_to_be32(0);
2586 *p++ = cpu_to_be32(MAJOR(stat.dev));
2587 *p++ = cpu_to_be32(0);
2588 *p++ = cpu_to_be32(MINOR(stat.dev));
2589 break;
2590 case FSIDSOURCE_UUID:
2591 p = xdr_encode_opaque_fixed(p, exp->ex_uuid,
2592 EX_UUID_LEN);
2593 break;
2594 }
2595 }
2596 if (bmval0 & FATTR4_WORD0_UNIQUE_HANDLES) {
2597 p = xdr_reserve_space(xdr, 4);
2598 if (!p)
2599 goto out_resource;
2600 *p++ = cpu_to_be32(0);
2601 }
2602 if (bmval0 & FATTR4_WORD0_LEASE_TIME) {
2603 p = xdr_reserve_space(xdr, 4);
2604 if (!p)
2605 goto out_resource;
2606 *p++ = cpu_to_be32(nn->nfsd4_lease);
2607 }
2608 if (bmval0 & FATTR4_WORD0_RDATTR_ERROR) {
2609 p = xdr_reserve_space(xdr, 4);
2610 if (!p)
2611 goto out_resource;
2612 *p++ = cpu_to_be32(rdattr_err);
2613 }
2614 if (bmval0 & FATTR4_WORD0_ACL) {
2615 struct nfs4_ace *ace;
2616
2617 if (acl == NULL) {
2618 p = xdr_reserve_space(xdr, 4);
2619 if (!p)
2620 goto out_resource;
2621
2622 *p++ = cpu_to_be32(0);
2623 goto out_acl;
2624 }
2625 p = xdr_reserve_space(xdr, 4);
2626 if (!p)
2627 goto out_resource;
2628 *p++ = cpu_to_be32(acl->naces);
2629
2630 for (ace = acl->aces; ace < acl->aces + acl->naces; ace++) {
2631 p = xdr_reserve_space(xdr, 4*3);
2632 if (!p)
2633 goto out_resource;
2634 *p++ = cpu_to_be32(ace->type);
2635 *p++ = cpu_to_be32(ace->flag);
2636 *p++ = cpu_to_be32(ace->access_mask &
2637 NFS4_ACE_MASK_ALL);
2638 status = nfsd4_encode_aclname(xdr, rqstp, ace);
2639 if (status)
2640 goto out;
2641 }
2642 }
2643out_acl:
2644 if (bmval0 & FATTR4_WORD0_ACLSUPPORT) {
2645 p = xdr_reserve_space(xdr, 4);
2646 if (!p)
2647 goto out_resource;
2648 *p++ = cpu_to_be32(IS_POSIXACL(dentry->d_inode) ?
2649 ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL : 0);
2650 }
2651 if (bmval0 & FATTR4_WORD0_CANSETTIME) {
2652 p = xdr_reserve_space(xdr, 4);
2653 if (!p)
2654 goto out_resource;
2655 *p++ = cpu_to_be32(1);
2656 }
2657 if (bmval0 & FATTR4_WORD0_CASE_INSENSITIVE) {
2658 p = xdr_reserve_space(xdr, 4);
2659 if (!p)
2660 goto out_resource;
2661 *p++ = cpu_to_be32(0);
2662 }
2663 if (bmval0 & FATTR4_WORD0_CASE_PRESERVING) {
2664 p = xdr_reserve_space(xdr, 4);
2665 if (!p)
2666 goto out_resource;
2667 *p++ = cpu_to_be32(1);
2668 }
2669 if (bmval0 & FATTR4_WORD0_CHOWN_RESTRICTED) {
2670 p = xdr_reserve_space(xdr, 4);
2671 if (!p)
2672 goto out_resource;
2673 *p++ = cpu_to_be32(1);
2674 }
2675 if (bmval0 & FATTR4_WORD0_FILEHANDLE) {
2676 p = xdr_reserve_space(xdr, fhp->fh_handle.fh_size + 4);
2677 if (!p)
2678 goto out_resource;
2679 p = xdr_encode_opaque(p, &fhp->fh_handle.fh_base,
2680 fhp->fh_handle.fh_size);
2681 }
2682 if (bmval0 & FATTR4_WORD0_FILEID) {
2683 p = xdr_reserve_space(xdr, 8);
2684 if (!p)
2685 goto out_resource;
2686 p = xdr_encode_hyper(p, stat.ino);
2687 }
2688 if (bmval0 & FATTR4_WORD0_FILES_AVAIL) {
2689 p = xdr_reserve_space(xdr, 8);
2690 if (!p)
2691 goto out_resource;
2692 p = xdr_encode_hyper(p, (u64) statfs.f_ffree);
2693 }
2694 if (bmval0 & FATTR4_WORD0_FILES_FREE) {
2695 p = xdr_reserve_space(xdr, 8);
2696 if (!p)
2697 goto out_resource;
2698 p = xdr_encode_hyper(p, (u64) statfs.f_ffree);
2699 }
2700 if (bmval0 & FATTR4_WORD0_FILES_TOTAL) {
2701 p = xdr_reserve_space(xdr, 8);
2702 if (!p)
2703 goto out_resource;
2704 p = xdr_encode_hyper(p, (u64) statfs.f_files);
2705 }
2706 if (bmval0 & FATTR4_WORD0_FS_LOCATIONS) {
2707 status = nfsd4_encode_fs_locations(xdr, rqstp, exp);
2708 if (status)
2709 goto out;
2710 }
2711 if (bmval0 & FATTR4_WORD0_HOMOGENEOUS) {
2712 p = xdr_reserve_space(xdr, 4);
2713 if (!p)
2714 goto out_resource;
2715 *p++ = cpu_to_be32(1);
2716 }
2717 if (bmval0 & FATTR4_WORD0_MAXFILESIZE) {
2718 p = xdr_reserve_space(xdr, 8);
2719 if (!p)
2720 goto out_resource;
2721 p = xdr_encode_hyper(p, exp->ex_path.mnt->mnt_sb->s_maxbytes);
2722 }
2723 if (bmval0 & FATTR4_WORD0_MAXLINK) {
2724 p = xdr_reserve_space(xdr, 4);
2725 if (!p)
2726 goto out_resource;
2727 *p++ = cpu_to_be32(255);
2728 }
2729 if (bmval0 & FATTR4_WORD0_MAXNAME) {
2730 p = xdr_reserve_space(xdr, 4);
2731 if (!p)
2732 goto out_resource;
2733 *p++ = cpu_to_be32(statfs.f_namelen);
2734 }
2735 if (bmval0 & FATTR4_WORD0_MAXREAD) {
2736 p = xdr_reserve_space(xdr, 8);
2737 if (!p)
2738 goto out_resource;
2739 p = xdr_encode_hyper(p, (u64) svc_max_payload(rqstp));
2740 }
2741 if (bmval0 & FATTR4_WORD0_MAXWRITE) {
2742 p = xdr_reserve_space(xdr, 8);
2743 if (!p)
2744 goto out_resource;
2745 p = xdr_encode_hyper(p, (u64) svc_max_payload(rqstp));
2746 }
2747 if (bmval1 & FATTR4_WORD1_MODE) {
2748 p = xdr_reserve_space(xdr, 4);
2749 if (!p)
2750 goto out_resource;
2751 *p++ = cpu_to_be32(stat.mode & S_IALLUGO);
2752 }
2753 if (bmval1 & FATTR4_WORD1_NO_TRUNC) {
2754 p = xdr_reserve_space(xdr, 4);
2755 if (!p)
2756 goto out_resource;
2757 *p++ = cpu_to_be32(1);
2758 }
2759 if (bmval1 & FATTR4_WORD1_NUMLINKS) {
2760 p = xdr_reserve_space(xdr, 4);
2761 if (!p)
2762 goto out_resource;
2763 *p++ = cpu_to_be32(stat.nlink);
2764 }
2765 if (bmval1 & FATTR4_WORD1_OWNER) {
2766 status = nfsd4_encode_user(xdr, rqstp, stat.uid);
2767 if (status)
2768 goto out;
2769 }
2770 if (bmval1 & FATTR4_WORD1_OWNER_GROUP) {
2771 status = nfsd4_encode_group(xdr, rqstp, stat.gid);
2772 if (status)
2773 goto out;
2774 }
2775 if (bmval1 & FATTR4_WORD1_RAWDEV) {
2776 p = xdr_reserve_space(xdr, 8);
2777 if (!p)
2778 goto out_resource;
2779 *p++ = cpu_to_be32((u32) MAJOR(stat.rdev));
2780 *p++ = cpu_to_be32((u32) MINOR(stat.rdev));
2781 }
2782 if (bmval1 & FATTR4_WORD1_SPACE_AVAIL) {
2783 p = xdr_reserve_space(xdr, 8);
2784 if (!p)
2785 goto out_resource;
2786 dummy64 = (u64)statfs.f_bavail * (u64)statfs.f_bsize;
2787 p = xdr_encode_hyper(p, dummy64);
2788 }
2789 if (bmval1 & FATTR4_WORD1_SPACE_FREE) {
2790 p = xdr_reserve_space(xdr, 8);
2791 if (!p)
2792 goto out_resource;
2793 dummy64 = (u64)statfs.f_bfree * (u64)statfs.f_bsize;
2794 p = xdr_encode_hyper(p, dummy64);
2795 }
2796 if (bmval1 & FATTR4_WORD1_SPACE_TOTAL) {
2797 p = xdr_reserve_space(xdr, 8);
2798 if (!p)
2799 goto out_resource;
2800 dummy64 = (u64)statfs.f_blocks * (u64)statfs.f_bsize;
2801 p = xdr_encode_hyper(p, dummy64);
2802 }
2803 if (bmval1 & FATTR4_WORD1_SPACE_USED) {
2804 p = xdr_reserve_space(xdr, 8);
2805 if (!p)
2806 goto out_resource;
2807 dummy64 = (u64)stat.blocks << 9;
2808 p = xdr_encode_hyper(p, dummy64);
2809 }
2810 if (bmval1 & FATTR4_WORD1_TIME_ACCESS) {
2811 p = xdr_reserve_space(xdr, 12);
2812 if (!p)
2813 goto out_resource;
2814 p = xdr_encode_hyper(p, (s64)stat.atime.tv_sec);
2815 *p++ = cpu_to_be32(stat.atime.tv_nsec);
2816 }
2817 if (bmval1 & FATTR4_WORD1_TIME_DELTA) {
2818 p = xdr_reserve_space(xdr, 12);
2819 if (!p)
2820 goto out_resource;
2821 p = encode_time_delta(p, d_inode(dentry));
2822 }
2823 if (bmval1 & FATTR4_WORD1_TIME_METADATA) {
2824 p = xdr_reserve_space(xdr, 12);
2825 if (!p)
2826 goto out_resource;
2827 p = xdr_encode_hyper(p, (s64)stat.ctime.tv_sec);
2828 *p++ = cpu_to_be32(stat.ctime.tv_nsec);
2829 }
2830 if (bmval1 & FATTR4_WORD1_TIME_MODIFY) {
2831 p = xdr_reserve_space(xdr, 12);
2832 if (!p)
2833 goto out_resource;
2834 p = xdr_encode_hyper(p, (s64)stat.mtime.tv_sec);
2835 *p++ = cpu_to_be32(stat.mtime.tv_nsec);
2836 }
2837 if (bmval1 & FATTR4_WORD1_MOUNTED_ON_FILEID) {
2838 struct kstat parent_stat;
2839 u64 ino = stat.ino;
2840
2841 p = xdr_reserve_space(xdr, 8);
2842 if (!p)
2843 goto out_resource;
2844
2845
2846
2847
2848 if (ignore_crossmnt == 0 &&
2849 dentry == exp->ex_path.mnt->mnt_root) {
2850 err = get_parent_attributes(exp, &parent_stat);
2851 if (err)
2852 goto out_nfserr;
2853 ino = parent_stat.ino;
2854 }
2855 p = xdr_encode_hyper(p, ino);
2856 }
2857#ifdef CONFIG_NFSD_PNFS
2858 if (bmval1 & FATTR4_WORD1_FS_LAYOUT_TYPES) {
2859 status = nfsd4_encode_layout_types(xdr, exp->ex_layout_types);
2860 if (status)
2861 goto out;
2862 }
2863
2864 if (bmval2 & FATTR4_WORD2_LAYOUT_TYPES) {
2865 status = nfsd4_encode_layout_types(xdr, exp->ex_layout_types);
2866 if (status)
2867 goto out;
2868 }
2869
2870 if (bmval2 & FATTR4_WORD2_LAYOUT_BLKSIZE) {
2871 p = xdr_reserve_space(xdr, 4);
2872 if (!p)
2873 goto out_resource;
2874 *p++ = cpu_to_be32(stat.blksize);
2875 }
2876#endif
2877 if (bmval2 & FATTR4_WORD2_SUPPATTR_EXCLCREAT) {
2878 u32 supp[3];
2879
2880 memcpy(supp, nfsd_suppattrs[minorversion], sizeof(supp));
2881 supp[0] &= NFSD_SUPPATTR_EXCLCREAT_WORD0;
2882 supp[1] &= NFSD_SUPPATTR_EXCLCREAT_WORD1;
2883 supp[2] &= NFSD_SUPPATTR_EXCLCREAT_WORD2;
2884
2885 status = nfsd4_encode_bitmap(xdr, supp[0], supp[1], supp[2]);
2886 if (status)
2887 goto out;
2888 }
2889
2890 if (bmval2 & FATTR4_WORD2_CHANGE_ATTR_TYPE) {
2891 p = xdr_reserve_space(xdr, 4);
2892 if (!p)
2893 goto out_resource;
2894 if (IS_I_VERSION(d_inode(dentry)))
2895 *p++ = cpu_to_be32(NFS4_CHANGE_TYPE_IS_MONOTONIC_INCR);
2896 else
2897 *p++ = cpu_to_be32(NFS4_CHANGE_TYPE_IS_TIME_METADATA);
2898 }
2899
2900#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
2901 if (bmval2 & FATTR4_WORD2_SECURITY_LABEL) {
2902 status = nfsd4_encode_security_label(xdr, rqstp, context,
2903 contextlen);
2904 if (status)
2905 goto out;
2906 }
2907#endif
2908
2909 attrlen = htonl(xdr->buf->len - attrlen_offset - 4);
2910 write_bytes_to_xdr_buf(xdr->buf, attrlen_offset, &attrlen, 4);
2911 status = nfs_ok;
2912
2913out:
2914#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
2915 if (context)
2916 security_release_secctx(context, contextlen);
2917#endif
2918 kfree(acl);
2919 if (tempfh) {
2920 fh_put(tempfh);
2921 kfree(tempfh);
2922 }
2923 if (status)
2924 xdr_truncate_encode(xdr, starting_len);
2925 return status;
2926out_nfserr:
2927 status = nfserrno(err);
2928 goto out;
2929out_resource:
2930 status = nfserr_resource;
2931 goto out;
2932}
2933
2934static void svcxdr_init_encode_from_buffer(struct xdr_stream *xdr,
2935 struct xdr_buf *buf, __be32 *p, int bytes)
2936{
2937 xdr->scratch.iov_len = 0;
2938 memset(buf, 0, sizeof(struct xdr_buf));
2939 buf->head[0].iov_base = p;
2940 buf->head[0].iov_len = 0;
2941 buf->len = 0;
2942 xdr->buf = buf;
2943 xdr->iov = buf->head;
2944 xdr->p = p;
2945 xdr->end = (void *)p + bytes;
2946 buf->buflen = bytes;
2947}
2948
2949__be32 nfsd4_encode_fattr_to_buf(__be32 **p, int words,
2950 struct svc_fh *fhp, struct svc_export *exp,
2951 struct dentry *dentry, u32 *bmval,
2952 struct svc_rqst *rqstp, int ignore_crossmnt)
2953{
2954 struct xdr_buf dummy;
2955 struct xdr_stream xdr;
2956 __be32 ret;
2957
2958 svcxdr_init_encode_from_buffer(&xdr, &dummy, *p, words << 2);
2959 ret = nfsd4_encode_fattr(&xdr, fhp, exp, dentry, bmval, rqstp,
2960 ignore_crossmnt);
2961 *p = xdr.p;
2962 return ret;
2963}
2964
2965static inline int attributes_need_mount(u32 *bmval)
2966{
2967 if (bmval[0] & ~(FATTR4_WORD0_RDATTR_ERROR | FATTR4_WORD0_LEASE_TIME))
2968 return 1;
2969 if (bmval[1] & ~FATTR4_WORD1_MOUNTED_ON_FILEID)
2970 return 1;
2971 return 0;
2972}
2973
2974static __be32
2975nfsd4_encode_dirent_fattr(struct xdr_stream *xdr, struct nfsd4_readdir *cd,
2976 const char *name, int namlen)
2977{
2978 struct svc_export *exp = cd->rd_fhp->fh_export;
2979 struct dentry *dentry;
2980 __be32 nfserr;
2981 int ignore_crossmnt = 0;
2982
2983 dentry = lookup_one_len_unlocked(name, cd->rd_fhp->fh_dentry, namlen);
2984 if (IS_ERR(dentry))
2985 return nfserrno(PTR_ERR(dentry));
2986 if (d_really_is_negative(dentry)) {
2987
2988
2989
2990
2991
2992 dput(dentry);
2993 return nfserr_noent;
2994 }
2995
2996 exp_get(exp);
2997
2998
2999
3000
3001
3002
3003
3004 if (nfsd_mountpoint(dentry, exp)) {
3005 int err;
3006
3007 if (!(exp->ex_flags & NFSEXP_V4ROOT)
3008 && !attributes_need_mount(cd->rd_bmval)) {
3009 ignore_crossmnt = 1;
3010 goto out_encode;
3011 }
3012
3013
3014
3015
3016
3017 err = nfsd_cross_mnt(cd->rd_rqstp, &dentry, &exp);
3018 if (err) {
3019 nfserr = nfserrno(err);
3020 goto out_put;
3021 }
3022 nfserr = check_nfsd_access(exp, cd->rd_rqstp);
3023 if (nfserr)
3024 goto out_put;
3025
3026 }
3027out_encode:
3028 nfserr = nfsd4_encode_fattr(xdr, NULL, exp, dentry, cd->rd_bmval,
3029 cd->rd_rqstp, ignore_crossmnt);
3030out_put:
3031 dput(dentry);
3032 exp_put(exp);
3033 return nfserr;
3034}
3035
3036static __be32 *
3037nfsd4_encode_rdattr_error(struct xdr_stream *xdr, __be32 nfserr)
3038{
3039 __be32 *p;
3040
3041 p = xdr_reserve_space(xdr, 20);
3042 if (!p)
3043 return NULL;
3044 *p++ = htonl(2);
3045 *p++ = htonl(FATTR4_WORD0_RDATTR_ERROR);
3046 *p++ = htonl(0);
3047
3048 *p++ = htonl(4);
3049 *p++ = nfserr;
3050 return p;
3051}
3052
3053static int
3054nfsd4_encode_dirent(void *ccdv, const char *name, int namlen,
3055 loff_t offset, u64 ino, unsigned int d_type)
3056{
3057 struct readdir_cd *ccd = ccdv;
3058 struct nfsd4_readdir *cd = container_of(ccd, struct nfsd4_readdir, common);
3059 struct xdr_stream *xdr = cd->xdr;
3060 int start_offset = xdr->buf->len;
3061 int cookie_offset;
3062 u32 name_and_cookie;
3063 int entry_bytes;
3064 __be32 nfserr = nfserr_toosmall;
3065 __be64 wire_offset;
3066 __be32 *p;
3067
3068
3069 if (name && isdotent(name, namlen)) {
3070 cd->common.err = nfs_ok;
3071 return 0;
3072 }
3073
3074 if (cd->cookie_offset) {
3075 wire_offset = cpu_to_be64(offset);
3076 write_bytes_to_xdr_buf(xdr->buf, cd->cookie_offset,
3077 &wire_offset, 8);
3078 }
3079
3080 p = xdr_reserve_space(xdr, 4);
3081 if (!p)
3082 goto fail;
3083 *p++ = xdr_one;
3084 cookie_offset = xdr->buf->len;
3085 p = xdr_reserve_space(xdr, 3*4 + namlen);
3086 if (!p)
3087 goto fail;
3088 p = xdr_encode_hyper(p, NFS_OFFSET_MAX);
3089 p = xdr_encode_array(p, name, namlen);
3090
3091 nfserr = nfsd4_encode_dirent_fattr(xdr, cd, name, namlen);
3092 switch (nfserr) {
3093 case nfs_ok:
3094 break;
3095 case nfserr_resource:
3096 nfserr = nfserr_toosmall;
3097 goto fail;
3098 case nfserr_noent:
3099 xdr_truncate_encode(xdr, start_offset);
3100 goto skip_entry;
3101 default:
3102
3103
3104
3105
3106
3107
3108
3109 if (!(cd->rd_bmval[0] & FATTR4_WORD0_RDATTR_ERROR))
3110 goto fail;
3111 p = nfsd4_encode_rdattr_error(xdr, nfserr);
3112 if (p == NULL) {
3113 nfserr = nfserr_toosmall;
3114 goto fail;
3115 }
3116 }
3117 nfserr = nfserr_toosmall;
3118 entry_bytes = xdr->buf->len - start_offset;
3119 if (entry_bytes > cd->rd_maxcount)
3120 goto fail;
3121 cd->rd_maxcount -= entry_bytes;
3122
3123
3124
3125
3126 if (!cd->rd_dircount)
3127 goto fail;
3128 name_and_cookie = 4 + 4 * XDR_QUADLEN(namlen) + 8;
3129 if (name_and_cookie > cd->rd_dircount && cd->cookie_offset)
3130 goto fail;
3131 cd->rd_dircount -= min(cd->rd_dircount, name_and_cookie);
3132
3133 cd->cookie_offset = cookie_offset;
3134skip_entry:
3135 cd->common.err = nfs_ok;
3136 return 0;
3137fail:
3138 xdr_truncate_encode(xdr, start_offset);
3139 cd->common.err = nfserr;
3140 return -EINVAL;
3141}
3142
3143static __be32
3144nfsd4_encode_stateid(struct xdr_stream *xdr, stateid_t *sid)
3145{
3146 __be32 *p;
3147
3148 p = xdr_reserve_space(xdr, sizeof(stateid_t));
3149 if (!p)
3150 return nfserr_resource;
3151 *p++ = cpu_to_be32(sid->si_generation);
3152 p = xdr_encode_opaque_fixed(p, &sid->si_opaque,
3153 sizeof(stateid_opaque_t));
3154 return 0;
3155}
3156
3157static __be32
3158nfsd4_encode_access(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_access *access)
3159{
3160 struct xdr_stream *xdr = &resp->xdr;
3161 __be32 *p;
3162
3163 p = xdr_reserve_space(xdr, 8);
3164 if (!p)
3165 return nfserr_resource;
3166 *p++ = cpu_to_be32(access->ac_supported);
3167 *p++ = cpu_to_be32(access->ac_resp_access);
3168 return 0;
3169}
3170
3171static __be32 nfsd4_encode_bind_conn_to_session(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_bind_conn_to_session *bcts)
3172{
3173 struct xdr_stream *xdr = &resp->xdr;
3174 __be32 *p;
3175
3176 p = xdr_reserve_space(xdr, NFS4_MAX_SESSIONID_LEN + 8);
3177 if (!p)
3178 return nfserr_resource;
3179 p = xdr_encode_opaque_fixed(p, bcts->sessionid.data,
3180 NFS4_MAX_SESSIONID_LEN);
3181 *p++ = cpu_to_be32(bcts->dir);
3182
3183 *p++ = cpu_to_be32(0);
3184 return 0;
3185}
3186
3187static __be32
3188nfsd4_encode_close(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_close *close)
3189{
3190 struct xdr_stream *xdr = &resp->xdr;
3191
3192 return nfsd4_encode_stateid(xdr, &close->cl_stateid);
3193}
3194
3195
3196static __be32
3197nfsd4_encode_commit(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_commit *commit)
3198{
3199 struct xdr_stream *xdr = &resp->xdr;
3200 __be32 *p;
3201
3202 p = xdr_reserve_space(xdr, NFS4_VERIFIER_SIZE);
3203 if (!p)
3204 return nfserr_resource;
3205 p = xdr_encode_opaque_fixed(p, commit->co_verf.data,
3206 NFS4_VERIFIER_SIZE);
3207 return 0;
3208}
3209
3210static __be32
3211nfsd4_encode_create(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_create *create)
3212{
3213 struct xdr_stream *xdr = &resp->xdr;
3214 __be32 *p;
3215
3216 p = xdr_reserve_space(xdr, 20);
3217 if (!p)
3218 return nfserr_resource;
3219 encode_cinfo(p, &create->cr_cinfo);
3220 nfserr = nfsd4_encode_bitmap(xdr, create->cr_bmval[0],
3221 create->cr_bmval[1], create->cr_bmval[2]);
3222 return 0;
3223}
3224
3225static __be32
3226nfsd4_encode_getattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_getattr *getattr)
3227{
3228 struct svc_fh *fhp = getattr->ga_fhp;
3229 struct xdr_stream *xdr = &resp->xdr;
3230
3231 return nfsd4_encode_fattr(xdr, fhp, fhp->fh_export, fhp->fh_dentry,
3232 getattr->ga_bmval, resp->rqstp, 0);
3233}
3234
3235static __be32
3236nfsd4_encode_getfh(struct nfsd4_compoundres *resp, __be32 nfserr, struct svc_fh **fhpp)
3237{
3238 struct xdr_stream *xdr = &resp->xdr;
3239 struct svc_fh *fhp = *fhpp;
3240 unsigned int len;
3241 __be32 *p;
3242
3243 len = fhp->fh_handle.fh_size;
3244 p = xdr_reserve_space(xdr, len + 4);
3245 if (!p)
3246 return nfserr_resource;
3247 p = xdr_encode_opaque(p, &fhp->fh_handle.fh_base, len);
3248 return 0;
3249}
3250
3251
3252
3253
3254
3255static __be32
3256nfsd4_encode_lock_denied(struct xdr_stream *xdr, struct nfsd4_lock_denied *ld)
3257{
3258 struct xdr_netobj *conf = &ld->ld_owner;
3259 __be32 *p;
3260
3261again:
3262 p = xdr_reserve_space(xdr, 32 + XDR_LEN(conf->len));
3263 if (!p) {
3264
3265
3266
3267
3268 if (conf->len) {
3269 kfree(conf->data);
3270 conf->len = 0;
3271 conf->data = NULL;
3272 goto again;
3273 }
3274 return nfserr_resource;
3275 }
3276 p = xdr_encode_hyper(p, ld->ld_start);
3277 p = xdr_encode_hyper(p, ld->ld_length);
3278 *p++ = cpu_to_be32(ld->ld_type);
3279 if (conf->len) {
3280 p = xdr_encode_opaque_fixed(p, &ld->ld_clientid, 8);
3281 p = xdr_encode_opaque(p, conf->data, conf->len);
3282 kfree(conf->data);
3283 } else {
3284 p = xdr_encode_hyper(p, (u64)0);
3285 *p++ = cpu_to_be32(0);
3286 }
3287 return nfserr_denied;
3288}
3289
3290static __be32
3291nfsd4_encode_lock(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lock *lock)
3292{
3293 struct xdr_stream *xdr = &resp->xdr;
3294
3295 if (!nfserr)
3296 nfserr = nfsd4_encode_stateid(xdr, &lock->lk_resp_stateid);
3297 else if (nfserr == nfserr_denied)
3298 nfserr = nfsd4_encode_lock_denied(xdr, &lock->lk_denied);
3299
3300 return nfserr;
3301}
3302
3303static __be32
3304nfsd4_encode_lockt(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lockt *lockt)
3305{
3306 struct xdr_stream *xdr = &resp->xdr;
3307
3308 if (nfserr == nfserr_denied)
3309 nfsd4_encode_lock_denied(xdr, &lockt->lt_denied);
3310 return nfserr;
3311}
3312
3313static __be32
3314nfsd4_encode_locku(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_locku *locku)
3315{
3316 struct xdr_stream *xdr = &resp->xdr;
3317
3318 return nfsd4_encode_stateid(xdr, &locku->lu_stateid);
3319}
3320
3321
3322static __be32
3323nfsd4_encode_link(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_link *link)
3324{
3325 struct xdr_stream *xdr = &resp->xdr;
3326 __be32 *p;
3327
3328 p = xdr_reserve_space(xdr, 20);
3329 if (!p)
3330 return nfserr_resource;
3331 p = encode_cinfo(p, &link->li_cinfo);
3332 return 0;
3333}
3334
3335
3336static __be32
3337nfsd4_encode_open(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open *open)
3338{
3339 struct xdr_stream *xdr = &resp->xdr;
3340 __be32 *p;
3341
3342 nfserr = nfsd4_encode_stateid(xdr, &open->op_stateid);
3343 if (nfserr)
3344 return nfserr;
3345 p = xdr_reserve_space(xdr, 24);
3346 if (!p)
3347 return nfserr_resource;
3348 p = encode_cinfo(p, &open->op_cinfo);
3349 *p++ = cpu_to_be32(open->op_rflags);
3350
3351 nfserr = nfsd4_encode_bitmap(xdr, open->op_bmval[0], open->op_bmval[1],
3352 open->op_bmval[2]);
3353 if (nfserr)
3354 return nfserr;
3355
3356 p = xdr_reserve_space(xdr, 4);
3357 if (!p)
3358 return nfserr_resource;
3359
3360 *p++ = cpu_to_be32(open->op_delegate_type);
3361 switch (open->op_delegate_type) {
3362 case NFS4_OPEN_DELEGATE_NONE:
3363 break;
3364 case NFS4_OPEN_DELEGATE_READ:
3365 nfserr = nfsd4_encode_stateid(xdr, &open->op_delegate_stateid);
3366 if (nfserr)
3367 return nfserr;
3368 p = xdr_reserve_space(xdr, 20);
3369 if (!p)
3370 return nfserr_resource;
3371 *p++ = cpu_to_be32(open->op_recall);
3372
3373
3374
3375
3376 *p++ = cpu_to_be32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
3377 *p++ = cpu_to_be32(0);
3378 *p++ = cpu_to_be32(0);
3379 *p++ = cpu_to_be32(0);
3380 break;
3381 case NFS4_OPEN_DELEGATE_WRITE:
3382 nfserr = nfsd4_encode_stateid(xdr, &open->op_delegate_stateid);
3383 if (nfserr)
3384 return nfserr;
3385 p = xdr_reserve_space(xdr, 32);
3386 if (!p)
3387 return nfserr_resource;
3388 *p++ = cpu_to_be32(0);
3389
3390
3391
3392
3393 *p++ = cpu_to_be32(NFS4_LIMIT_SIZE);
3394 *p++ = cpu_to_be32(~(u32)0);
3395 *p++ = cpu_to_be32(~(u32)0);
3396
3397
3398
3399
3400 *p++ = cpu_to_be32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
3401 *p++ = cpu_to_be32(0);
3402 *p++ = cpu_to_be32(0);
3403 *p++ = cpu_to_be32(0);
3404 break;
3405 case NFS4_OPEN_DELEGATE_NONE_EXT:
3406 switch (open->op_why_no_deleg) {
3407 case WND4_CONTENTION:
3408 case WND4_RESOURCE:
3409 p = xdr_reserve_space(xdr, 8);
3410 if (!p)
3411 return nfserr_resource;
3412 *p++ = cpu_to_be32(open->op_why_no_deleg);
3413
3414 *p++ = cpu_to_be32(0);
3415 break;
3416 default:
3417 p = xdr_reserve_space(xdr, 4);
3418 if (!p)
3419 return nfserr_resource;
3420 *p++ = cpu_to_be32(open->op_why_no_deleg);
3421 }
3422 break;
3423 default:
3424 BUG();
3425 }
3426
3427 return 0;
3428}
3429
3430static __be32
3431nfsd4_encode_open_confirm(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_confirm *oc)
3432{
3433 struct xdr_stream *xdr = &resp->xdr;
3434
3435 return nfsd4_encode_stateid(xdr, &oc->oc_resp_stateid);
3436}
3437
3438static __be32
3439nfsd4_encode_open_downgrade(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_downgrade *od)
3440{
3441 struct xdr_stream *xdr = &resp->xdr;
3442
3443 return nfsd4_encode_stateid(xdr, &od->od_stateid);
3444}
3445
3446static __be32 nfsd4_encode_splice_read(
3447 struct nfsd4_compoundres *resp,
3448 struct nfsd4_read *read,
3449 struct file *file, unsigned long maxcount)
3450{
3451 struct xdr_stream *xdr = &resp->xdr;
3452 struct xdr_buf *buf = xdr->buf;
3453 u32 eof;
3454 long len;
3455 int space_left;
3456 __be32 nfserr;
3457 __be32 *p = xdr->p - 2;
3458
3459
3460 if (xdr->end - xdr->p < 1)
3461 return nfserr_resource;
3462
3463 len = maxcount;
3464 nfserr = nfsd_splice_read(read->rd_rqstp, read->rd_fhp,
3465 file, read->rd_offset, &maxcount);
3466 read->rd_length = maxcount;
3467 if (nfserr) {
3468
3469
3470
3471
3472
3473 buf->page_len = 0;
3474 return nfserr;
3475 }
3476
3477 eof = nfsd_eof_on_read(len, maxcount, read->rd_offset,
3478 d_inode(read->rd_fhp->fh_dentry)->i_size);
3479
3480 *(p++) = htonl(eof);
3481 *(p++) = htonl(maxcount);
3482
3483 buf->page_len = maxcount;
3484 buf->len += maxcount;
3485 xdr->page_ptr += (buf->page_base + maxcount + PAGE_SIZE - 1)
3486 / PAGE_SIZE;
3487
3488
3489 buf->tail[0].iov_base = xdr->p;
3490 buf->tail[0].iov_len = 0;
3491 xdr->iov = buf->tail;
3492 if (maxcount&3) {
3493 int pad = 4 - (maxcount&3);
3494
3495 *(xdr->p++) = 0;
3496
3497 buf->tail[0].iov_base += maxcount&3;
3498 buf->tail[0].iov_len = pad;
3499 buf->len += pad;
3500 }
3501
3502 space_left = min_t(int, (void *)xdr->end - (void *)xdr->p,
3503 buf->buflen - buf->len);
3504 buf->buflen = buf->len + space_left;
3505 xdr->end = (__be32 *)((void *)xdr->end + space_left);
3506
3507 return 0;
3508}
3509
3510static __be32 nfsd4_encode_readv(struct nfsd4_compoundres *resp,
3511 struct nfsd4_read *read,
3512 struct file *file, unsigned long maxcount)
3513{
3514 struct xdr_stream *xdr = &resp->xdr;
3515 u32 eof;
3516 int v;
3517 int starting_len = xdr->buf->len - 8;
3518 long len;
3519 int thislen;
3520 __be32 nfserr;
3521 __be32 tmp;
3522 __be32 *p;
3523 u32 zzz = 0;
3524 int pad;
3525
3526 len = maxcount;
3527 v = 0;
3528
3529 thislen = min_t(long, len, ((void *)xdr->end - (void *)xdr->p));
3530 p = xdr_reserve_space(xdr, (thislen+3)&~3);
3531 WARN_ON_ONCE(!p);
3532 resp->rqstp->rq_vec[v].iov_base = p;
3533 resp->rqstp->rq_vec[v].iov_len = thislen;
3534 v++;
3535 len -= thislen;
3536
3537 while (len) {
3538 thislen = min_t(long, len, PAGE_SIZE);
3539 p = xdr_reserve_space(xdr, (thislen+3)&~3);
3540 WARN_ON_ONCE(!p);
3541 resp->rqstp->rq_vec[v].iov_base = p;
3542 resp->rqstp->rq_vec[v].iov_len = thislen;
3543 v++;
3544 len -= thislen;
3545 }
3546 read->rd_vlen = v;
3547
3548 len = maxcount;
3549 nfserr = nfsd_readv(resp->rqstp, read->rd_fhp, file, read->rd_offset,
3550 resp->rqstp->rq_vec, read->rd_vlen, &maxcount);
3551 read->rd_length = maxcount;
3552 if (nfserr)
3553 return nfserr;
3554 xdr_truncate_encode(xdr, starting_len + 8 + ((maxcount+3)&~3));
3555
3556 eof = nfsd_eof_on_read(len, maxcount, read->rd_offset,
3557 d_inode(read->rd_fhp->fh_dentry)->i_size);
3558
3559 tmp = htonl(eof);
3560 write_bytes_to_xdr_buf(xdr->buf, starting_len , &tmp, 4);
3561 tmp = htonl(maxcount);
3562 write_bytes_to_xdr_buf(xdr->buf, starting_len + 4, &tmp, 4);
3563
3564 pad = (maxcount&3) ? 4 - (maxcount&3) : 0;
3565 write_bytes_to_xdr_buf(xdr->buf, starting_len + 8 + maxcount,
3566 &zzz, pad);
3567 return 0;
3568
3569}
3570
3571static __be32
3572nfsd4_encode_read(struct nfsd4_compoundres *resp, __be32 nfserr,
3573 struct nfsd4_read *read)
3574{
3575 unsigned long maxcount;
3576 struct xdr_stream *xdr = &resp->xdr;
3577 struct file *file = read->rd_filp;
3578 int starting_len = xdr->buf->len;
3579 struct raparms *ra = NULL;
3580 __be32 *p;
3581
3582 p = xdr_reserve_space(xdr, 8);
3583 if (!p) {
3584 WARN_ON_ONCE(test_bit(RQ_SPLICE_OK, &resp->rqstp->rq_flags));
3585 return nfserr_resource;
3586 }
3587 if (resp->xdr.buf->page_len &&
3588 test_bit(RQ_SPLICE_OK, &resp->rqstp->rq_flags)) {
3589 WARN_ON_ONCE(1);
3590 return nfserr_resource;
3591 }
3592 xdr_commit_encode(xdr);
3593
3594 maxcount = svc_max_payload(resp->rqstp);
3595 maxcount = min_t(unsigned long, maxcount,
3596 (xdr->buf->buflen - xdr->buf->len));
3597 maxcount = min_t(unsigned long, maxcount, read->rd_length);
3598
3599 if (read->rd_tmp_file)
3600 ra = nfsd_init_raparms(file);
3601
3602 if (file->f_op->splice_read &&
3603 test_bit(RQ_SPLICE_OK, &resp->rqstp->rq_flags))
3604 nfserr = nfsd4_encode_splice_read(resp, read, file, maxcount);
3605 else
3606 nfserr = nfsd4_encode_readv(resp, read, file, maxcount);
3607
3608 if (ra)
3609 nfsd_put_raparams(file, ra);
3610
3611 if (nfserr)
3612 xdr_truncate_encode(xdr, starting_len);
3613
3614 return nfserr;
3615}
3616
3617static __be32
3618nfsd4_encode_readlink(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readlink *readlink)
3619{
3620 int maxcount;
3621 __be32 wire_count;
3622 int zero = 0;
3623 struct xdr_stream *xdr = &resp->xdr;
3624 int length_offset = xdr->buf->len;
3625 __be32 *p;
3626
3627 p = xdr_reserve_space(xdr, 4);
3628 if (!p)
3629 return nfserr_resource;
3630 maxcount = PAGE_SIZE;
3631
3632 p = xdr_reserve_space(xdr, maxcount);
3633 if (!p)
3634 return nfserr_resource;
3635
3636
3637
3638
3639
3640
3641 nfserr = nfsd_readlink(readlink->rl_rqstp, readlink->rl_fhp,
3642 (char *)p, &maxcount);
3643 if (nfserr == nfserr_isdir)
3644 nfserr = nfserr_inval;
3645 if (nfserr) {
3646 xdr_truncate_encode(xdr, length_offset);
3647 return nfserr;
3648 }
3649
3650 wire_count = htonl(maxcount);
3651 write_bytes_to_xdr_buf(xdr->buf, length_offset, &wire_count, 4);
3652 xdr_truncate_encode(xdr, length_offset + 4 + ALIGN(maxcount, 4));
3653 if (maxcount & 3)
3654 write_bytes_to_xdr_buf(xdr->buf, length_offset + 4 + maxcount,
3655 &zero, 4 - (maxcount&3));
3656 return 0;
3657}
3658
3659static __be32
3660nfsd4_encode_readdir(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readdir *readdir)
3661{
3662 int maxcount;
3663 int bytes_left;
3664 loff_t offset;
3665 __be64 wire_offset;
3666 struct xdr_stream *xdr = &resp->xdr;
3667 int starting_len = xdr->buf->len;
3668 __be32 *p;
3669
3670 p = xdr_reserve_space(xdr, NFS4_VERIFIER_SIZE);
3671 if (!p)
3672 return nfserr_resource;
3673
3674
3675 *p++ = cpu_to_be32(0);
3676 *p++ = cpu_to_be32(0);
3677 resp->xdr.buf->head[0].iov_len = ((char *)resp->xdr.p)
3678 - (char *)resp->xdr.buf->head[0].iov_base;
3679
3680
3681
3682
3683
3684 bytes_left = xdr->buf->buflen - xdr->buf->len
3685 - COMPOUND_ERR_SLACK_SPACE - 8;
3686 if (bytes_left < 0) {
3687 nfserr = nfserr_resource;
3688 goto err_no_verf;
3689 }
3690 maxcount = svc_max_payload(resp->rqstp);
3691 maxcount = min_t(u32, readdir->rd_maxcount, maxcount);
3692
3693
3694
3695
3696
3697 if (maxcount < 16) {
3698 nfserr = nfserr_toosmall;
3699 goto err_no_verf;
3700 }
3701 maxcount = min_t(int, maxcount-16, bytes_left);
3702
3703
3704 if (!readdir->rd_dircount)
3705 readdir->rd_dircount = svc_max_payload(resp->rqstp);
3706
3707 readdir->xdr = xdr;
3708 readdir->rd_maxcount = maxcount;
3709 readdir->common.err = 0;
3710 readdir->cookie_offset = 0;
3711
3712 offset = readdir->rd_cookie;
3713 nfserr = nfsd_readdir(readdir->rd_rqstp, readdir->rd_fhp,
3714 &offset,
3715 &readdir->common, nfsd4_encode_dirent);
3716 if (nfserr == nfs_ok &&
3717 readdir->common.err == nfserr_toosmall &&
3718 xdr->buf->len == starting_len + 8) {
3719
3720 if (maxcount - 16 < bytes_left)
3721
3722 nfserr = nfserr_toosmall;
3723 else
3724
3725 nfserr = nfserr_resource;
3726 }
3727 if (nfserr)
3728 goto err_no_verf;
3729
3730 if (readdir->cookie_offset) {
3731 wire_offset = cpu_to_be64(offset);
3732 write_bytes_to_xdr_buf(xdr->buf, readdir->cookie_offset,
3733 &wire_offset, 8);
3734 }
3735
3736 p = xdr_reserve_space(xdr, 8);
3737 if (!p) {
3738 WARN_ON_ONCE(1);
3739 goto err_no_verf;
3740 }
3741 *p++ = 0;
3742 *p++ = htonl(readdir->common.err == nfserr_eof);
3743
3744 return 0;
3745err_no_verf:
3746 xdr_truncate_encode(xdr, starting_len);
3747 return nfserr;
3748}
3749
3750static __be32
3751nfsd4_encode_remove(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_remove *remove)
3752{
3753 struct xdr_stream *xdr = &resp->xdr;
3754 __be32 *p;
3755
3756 p = xdr_reserve_space(xdr, 20);
3757 if (!p)
3758 return nfserr_resource;
3759 p = encode_cinfo(p, &remove->rm_cinfo);
3760 return 0;
3761}
3762
3763static __be32
3764nfsd4_encode_rename(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_rename *rename)
3765{
3766 struct xdr_stream *xdr = &resp->xdr;
3767 __be32 *p;
3768
3769 p = xdr_reserve_space(xdr, 40);
3770 if (!p)
3771 return nfserr_resource;
3772 p = encode_cinfo(p, &rename->rn_sinfo);
3773 p = encode_cinfo(p, &rename->rn_tinfo);
3774 return 0;
3775}
3776
3777static __be32
3778nfsd4_do_encode_secinfo(struct xdr_stream *xdr, struct svc_export *exp)
3779{
3780 u32 i, nflavs, supported;
3781 struct exp_flavor_info *flavs;
3782 struct exp_flavor_info def_flavs[2];
3783 __be32 *p, *flavorsp;
3784 static bool report = true;
3785
3786 if (exp->ex_nflavors) {
3787 flavs = exp->ex_flavors;
3788 nflavs = exp->ex_nflavors;
3789 } else {
3790 flavs = def_flavs;
3791 if (exp->ex_client->flavour->flavour == RPC_AUTH_UNIX) {
3792 nflavs = 2;
3793 flavs[0].pseudoflavor = RPC_AUTH_UNIX;
3794 flavs[1].pseudoflavor = RPC_AUTH_NULL;
3795 } else if (exp->ex_client->flavour->flavour == RPC_AUTH_GSS) {
3796 nflavs = 1;
3797 flavs[0].pseudoflavor
3798 = svcauth_gss_flavor(exp->ex_client);
3799 } else {
3800 nflavs = 1;
3801 flavs[0].pseudoflavor
3802 = exp->ex_client->flavour->flavour;
3803 }
3804 }
3805
3806 supported = 0;
3807 p = xdr_reserve_space(xdr, 4);
3808 if (!p)
3809 return nfserr_resource;
3810 flavorsp = p++;
3811
3812 for (i = 0; i < nflavs; i++) {
3813 rpc_authflavor_t pf = flavs[i].pseudoflavor;
3814 struct rpcsec_gss_info info;
3815
3816 if (rpcauth_get_gssinfo(pf, &info) == 0) {
3817 supported++;
3818 p = xdr_reserve_space(xdr, 4 + 4 +
3819 XDR_LEN(info.oid.len) + 4 + 4);
3820 if (!p)
3821 return nfserr_resource;
3822 *p++ = cpu_to_be32(RPC_AUTH_GSS);
3823 p = xdr_encode_opaque(p, info.oid.data, info.oid.len);
3824 *p++ = cpu_to_be32(info.qop);
3825 *p++ = cpu_to_be32(info.service);
3826 } else if (pf < RPC_AUTH_MAXFLAVOR) {
3827 supported++;
3828 p = xdr_reserve_space(xdr, 4);
3829 if (!p)
3830 return nfserr_resource;
3831 *p++ = cpu_to_be32(pf);
3832 } else {
3833 if (report)
3834 pr_warn("NFS: SECINFO: security flavor %u "
3835 "is not supported\n", pf);
3836 }
3837 }
3838
3839 if (nflavs != supported)
3840 report = false;
3841 *flavorsp = htonl(supported);
3842 return 0;
3843}
3844
3845static __be32
3846nfsd4_encode_secinfo(struct nfsd4_compoundres *resp, __be32 nfserr,
3847 struct nfsd4_secinfo *secinfo)
3848{
3849 struct xdr_stream *xdr = &resp->xdr;
3850
3851 return nfsd4_do_encode_secinfo(xdr, secinfo->si_exp);
3852}
3853
3854static __be32
3855nfsd4_encode_secinfo_no_name(struct nfsd4_compoundres *resp, __be32 nfserr,
3856 struct nfsd4_secinfo_no_name *secinfo)
3857{
3858 struct xdr_stream *xdr = &resp->xdr;
3859
3860 return nfsd4_do_encode_secinfo(xdr, secinfo->sin_exp);
3861}
3862
3863
3864
3865
3866
3867static __be32
3868nfsd4_encode_setattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setattr *setattr)
3869{
3870 struct xdr_stream *xdr = &resp->xdr;
3871 __be32 *p;
3872
3873 p = xdr_reserve_space(xdr, 16);
3874 if (!p)
3875 return nfserr_resource;
3876 if (nfserr) {
3877 *p++ = cpu_to_be32(3);
3878 *p++ = cpu_to_be32(0);
3879 *p++ = cpu_to_be32(0);
3880 *p++ = cpu_to_be32(0);
3881 }
3882 else {
3883 *p++ = cpu_to_be32(3);
3884 *p++ = cpu_to_be32(setattr->sa_bmval[0]);
3885 *p++ = cpu_to_be32(setattr->sa_bmval[1]);
3886 *p++ = cpu_to_be32(setattr->sa_bmval[2]);
3887 }
3888 return nfserr;
3889}
3890
3891static __be32
3892nfsd4_encode_setclientid(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setclientid *scd)
3893{
3894 struct xdr_stream *xdr = &resp->xdr;
3895 __be32 *p;
3896
3897 if (!nfserr) {
3898 p = xdr_reserve_space(xdr, 8 + NFS4_VERIFIER_SIZE);
3899 if (!p)
3900 return nfserr_resource;
3901 p = xdr_encode_opaque_fixed(p, &scd->se_clientid, 8);
3902 p = xdr_encode_opaque_fixed(p, &scd->se_confirm,
3903 NFS4_VERIFIER_SIZE);
3904 }
3905 else if (nfserr == nfserr_clid_inuse) {
3906 p = xdr_reserve_space(xdr, 8);
3907 if (!p)
3908 return nfserr_resource;
3909 *p++ = cpu_to_be32(0);
3910 *p++ = cpu_to_be32(0);
3911 }
3912 return nfserr;
3913}
3914
3915static __be32
3916nfsd4_encode_write(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_write *write)
3917{
3918 struct xdr_stream *xdr = &resp->xdr;
3919 __be32 *p;
3920
3921 p = xdr_reserve_space(xdr, 16);
3922 if (!p)
3923 return nfserr_resource;
3924 *p++ = cpu_to_be32(write->wr_bytes_written);
3925 *p++ = cpu_to_be32(write->wr_how_written);
3926 p = xdr_encode_opaque_fixed(p, write->wr_verifier.data,
3927 NFS4_VERIFIER_SIZE);
3928 return 0;
3929}
3930
3931static __be32
3932nfsd4_encode_exchange_id(struct nfsd4_compoundres *resp, __be32 nfserr,
3933 struct nfsd4_exchange_id *exid)
3934{
3935 struct xdr_stream *xdr = &resp->xdr;
3936 __be32 *p;
3937 char *major_id;
3938 char *server_scope;
3939 int major_id_sz;
3940 int server_scope_sz;
3941 uint64_t minor_id = 0;
3942
3943 major_id = utsname()->nodename;
3944 major_id_sz = strlen(major_id);
3945 server_scope = utsname()->nodename;
3946 server_scope_sz = strlen(server_scope);
3947
3948 p = xdr_reserve_space(xdr,
3949 8 +
3950 4 +
3951 4 +
3952 4 );
3953 if (!p)
3954 return nfserr_resource;
3955
3956 p = xdr_encode_opaque_fixed(p, &exid->clientid, 8);
3957 *p++ = cpu_to_be32(exid->seqid);
3958 *p++ = cpu_to_be32(exid->flags);
3959
3960 *p++ = cpu_to_be32(exid->spa_how);
3961
3962 switch (exid->spa_how) {
3963 case SP4_NONE:
3964 break;
3965 case SP4_MACH_CRED:
3966
3967 nfserr = nfsd4_encode_bitmap(xdr,
3968 exid->spo_must_enforce[0],
3969 exid->spo_must_enforce[1],
3970 exid->spo_must_enforce[2]);
3971 if (nfserr)
3972 return nfserr;
3973
3974 nfserr = nfsd4_encode_bitmap(xdr,
3975 exid->spo_must_allow[0],
3976 exid->spo_must_allow[1],
3977 exid->spo_must_allow[2]);
3978 if (nfserr)
3979 return nfserr;
3980 break;
3981 default:
3982 WARN_ON_ONCE(1);
3983 }
3984
3985 p = xdr_reserve_space(xdr,
3986 8 +
3987 4 +
3988 (XDR_QUADLEN(major_id_sz) * 4) +
3989 4 +
3990 (XDR_QUADLEN(server_scope_sz) * 4) +
3991 4 );
3992 if (!p)
3993 return nfserr_resource;
3994
3995
3996 p = xdr_encode_hyper(p, minor_id);
3997
3998 p = xdr_encode_opaque(p, major_id, major_id_sz);
3999
4000
4001 p = xdr_encode_opaque(p, server_scope, server_scope_sz);
4002
4003
4004 *p++ = cpu_to_be32(0);
4005 return 0;
4006}
4007
4008static __be32
4009nfsd4_encode_create_session(struct nfsd4_compoundres *resp, __be32 nfserr,
4010 struct nfsd4_create_session *sess)
4011{
4012 struct xdr_stream *xdr = &resp->xdr;
4013 __be32 *p;
4014
4015 p = xdr_reserve_space(xdr, 24);
4016 if (!p)
4017 return nfserr_resource;
4018 p = xdr_encode_opaque_fixed(p, sess->sessionid.data,
4019 NFS4_MAX_SESSIONID_LEN);
4020 *p++ = cpu_to_be32(sess->seqid);
4021 *p++ = cpu_to_be32(sess->flags);
4022
4023 p = xdr_reserve_space(xdr, 28);
4024 if (!p)
4025 return nfserr_resource;
4026 *p++ = cpu_to_be32(0);
4027 *p++ = cpu_to_be32(sess->fore_channel.maxreq_sz);
4028 *p++ = cpu_to_be32(sess->fore_channel.maxresp_sz);
4029 *p++ = cpu_to_be32(sess->fore_channel.maxresp_cached);
4030 *p++ = cpu_to_be32(sess->fore_channel.maxops);
4031 *p++ = cpu_to_be32(sess->fore_channel.maxreqs);
4032 *p++ = cpu_to_be32(sess->fore_channel.nr_rdma_attrs);
4033
4034 if (sess->fore_channel.nr_rdma_attrs) {
4035 p = xdr_reserve_space(xdr, 4);
4036 if (!p)
4037 return nfserr_resource;
4038 *p++ = cpu_to_be32(sess->fore_channel.rdma_attrs);
4039 }
4040
4041 p = xdr_reserve_space(xdr, 28);
4042 if (!p)
4043 return nfserr_resource;
4044 *p++ = cpu_to_be32(0);
4045 *p++ = cpu_to_be32(sess->back_channel.maxreq_sz);
4046 *p++ = cpu_to_be32(sess->back_channel.maxresp_sz);
4047 *p++ = cpu_to_be32(sess->back_channel.maxresp_cached);
4048 *p++ = cpu_to_be32(sess->back_channel.maxops);
4049 *p++ = cpu_to_be32(sess->back_channel.maxreqs);
4050 *p++ = cpu_to_be32(sess->back_channel.nr_rdma_attrs);
4051
4052 if (sess->back_channel.nr_rdma_attrs) {
4053 p = xdr_reserve_space(xdr, 4);
4054 if (!p)
4055 return nfserr_resource;
4056 *p++ = cpu_to_be32(sess->back_channel.rdma_attrs);
4057 }
4058 return 0;
4059}
4060
4061static __be32
4062nfsd4_encode_sequence(struct nfsd4_compoundres *resp, __be32 nfserr,
4063 struct nfsd4_sequence *seq)
4064{
4065 struct xdr_stream *xdr = &resp->xdr;
4066 __be32 *p;
4067
4068 p = xdr_reserve_space(xdr, NFS4_MAX_SESSIONID_LEN + 20);
4069 if (!p)
4070 return nfserr_resource;
4071 p = xdr_encode_opaque_fixed(p, seq->sessionid.data,
4072 NFS4_MAX_SESSIONID_LEN);
4073 *p++ = cpu_to_be32(seq->seqid);
4074 *p++ = cpu_to_be32(seq->slotid);
4075
4076 *p++ = cpu_to_be32(seq->maxslots - 1);
4077 *p++ = cpu_to_be32(seq->maxslots - 1);
4078 *p++ = cpu_to_be32(seq->status_flags);
4079
4080 resp->cstate.data_offset = xdr->buf->len;
4081 return 0;
4082}
4083
4084static __be32
4085nfsd4_encode_test_stateid(struct nfsd4_compoundres *resp, __be32 nfserr,
4086 struct nfsd4_test_stateid *test_stateid)
4087{
4088 struct xdr_stream *xdr = &resp->xdr;
4089 struct nfsd4_test_stateid_id *stateid, *next;
4090 __be32 *p;
4091
4092 p = xdr_reserve_space(xdr, 4 + (4 * test_stateid->ts_num_ids));
4093 if (!p)
4094 return nfserr_resource;
4095 *p++ = htonl(test_stateid->ts_num_ids);
4096
4097 list_for_each_entry_safe(stateid, next, &test_stateid->ts_stateid_list, ts_id_list) {
4098 *p++ = stateid->ts_id_status;
4099 }
4100
4101 return 0;
4102}
4103
4104#ifdef CONFIG_NFSD_PNFS
4105static __be32
4106nfsd4_encode_getdeviceinfo(struct nfsd4_compoundres *resp, __be32 nfserr,
4107 struct nfsd4_getdeviceinfo *gdev)
4108{
4109 struct xdr_stream *xdr = &resp->xdr;
4110 const struct nfsd4_layout_ops *ops;
4111 u32 starting_len = xdr->buf->len, needed_len;
4112 __be32 *p;
4113
4114 p = xdr_reserve_space(xdr, 4);
4115 if (!p)
4116 return nfserr_resource;
4117
4118 *p++ = cpu_to_be32(gdev->gd_layout_type);
4119
4120
4121 if (gdev->gd_maxcount != 0) {
4122 ops = nfsd4_layout_ops[gdev->gd_layout_type];
4123 nfserr = ops->encode_getdeviceinfo(xdr, gdev);
4124 if (nfserr) {
4125
4126
4127
4128
4129
4130 if (xdr->buf->len + 4 > gdev->gd_maxcount)
4131 goto toosmall;
4132 return nfserr;
4133 }
4134 }
4135
4136 if (gdev->gd_notify_types) {
4137 p = xdr_reserve_space(xdr, 4 + 4);
4138 if (!p)
4139 return nfserr_resource;
4140 *p++ = cpu_to_be32(1);
4141 *p++ = cpu_to_be32(gdev->gd_notify_types);
4142 } else {
4143 p = xdr_reserve_space(xdr, 4);
4144 if (!p)
4145 return nfserr_resource;
4146 *p++ = 0;
4147 }
4148
4149 return 0;
4150toosmall:
4151 dprintk("%s: maxcount too small\n", __func__);
4152 needed_len = xdr->buf->len + 4 ;
4153 xdr_truncate_encode(xdr, starting_len);
4154 p = xdr_reserve_space(xdr, 4);
4155 if (!p)
4156 return nfserr_resource;
4157 *p++ = cpu_to_be32(needed_len);
4158 return nfserr_toosmall;
4159}
4160
4161static __be32
4162nfsd4_encode_layoutget(struct nfsd4_compoundres *resp, __be32 nfserr,
4163 struct nfsd4_layoutget *lgp)
4164{
4165 struct xdr_stream *xdr = &resp->xdr;
4166 const struct nfsd4_layout_ops *ops;
4167 __be32 *p;
4168
4169 p = xdr_reserve_space(xdr, 36 + sizeof(stateid_opaque_t));
4170 if (!p)
4171 return nfserr_resource;
4172
4173 *p++ = cpu_to_be32(1);
4174 *p++ = cpu_to_be32(lgp->lg_sid.si_generation);
4175 p = xdr_encode_opaque_fixed(p, &lgp->lg_sid.si_opaque,
4176 sizeof(stateid_opaque_t));
4177
4178 *p++ = cpu_to_be32(1);
4179 p = xdr_encode_hyper(p, lgp->lg_seg.offset);
4180 p = xdr_encode_hyper(p, lgp->lg_seg.length);
4181 *p++ = cpu_to_be32(lgp->lg_seg.iomode);
4182 *p++ = cpu_to_be32(lgp->lg_layout_type);
4183
4184 ops = nfsd4_layout_ops[lgp->lg_layout_type];
4185 return ops->encode_layoutget(xdr, lgp);
4186}
4187
4188static __be32
4189nfsd4_encode_layoutcommit(struct nfsd4_compoundres *resp, __be32 nfserr,
4190 struct nfsd4_layoutcommit *lcp)
4191{
4192 struct xdr_stream *xdr = &resp->xdr;
4193 __be32 *p;
4194
4195 p = xdr_reserve_space(xdr, 4);
4196 if (!p)
4197 return nfserr_resource;
4198 *p++ = cpu_to_be32(lcp->lc_size_chg);
4199 if (lcp->lc_size_chg) {
4200 p = xdr_reserve_space(xdr, 8);
4201 if (!p)
4202 return nfserr_resource;
4203 p = xdr_encode_hyper(p, lcp->lc_newsize);
4204 }
4205
4206 return 0;
4207}
4208
4209static __be32
4210nfsd4_encode_layoutreturn(struct nfsd4_compoundres *resp, __be32 nfserr,
4211 struct nfsd4_layoutreturn *lrp)
4212{
4213 struct xdr_stream *xdr = &resp->xdr;
4214 __be32 *p;
4215
4216 p = xdr_reserve_space(xdr, 4);
4217 if (!p)
4218 return nfserr_resource;
4219 *p++ = cpu_to_be32(lrp->lrs_present);
4220 if (lrp->lrs_present)
4221 return nfsd4_encode_stateid(xdr, &lrp->lr_sid);
4222 return 0;
4223}
4224#endif
4225
4226static __be32
4227nfsd42_encode_write_res(struct nfsd4_compoundres *resp,
4228 struct nfsd42_write_res *write, bool sync)
4229{
4230 __be32 *p;
4231 p = xdr_reserve_space(&resp->xdr, 4);
4232 if (!p)
4233 return nfserr_resource;
4234
4235 if (sync)
4236 *p++ = cpu_to_be32(0);
4237 else {
4238 __be32 nfserr;
4239 *p++ = cpu_to_be32(1);
4240 nfserr = nfsd4_encode_stateid(&resp->xdr, &write->cb_stateid);
4241 if (nfserr)
4242 return nfserr;
4243 }
4244 p = xdr_reserve_space(&resp->xdr, 8 + 4 + NFS4_VERIFIER_SIZE);
4245 if (!p)
4246 return nfserr_resource;
4247
4248 p = xdr_encode_hyper(p, write->wr_bytes_written);
4249 *p++ = cpu_to_be32(write->wr_stable_how);
4250 p = xdr_encode_opaque_fixed(p, write->wr_verifier.data,
4251 NFS4_VERIFIER_SIZE);
4252 return nfs_ok;
4253}
4254
4255static __be32
4256nfsd4_encode_copy(struct nfsd4_compoundres *resp, __be32 nfserr,
4257 struct nfsd4_copy *copy)
4258{
4259 __be32 *p;
4260
4261 nfserr = nfsd42_encode_write_res(resp, ©->cp_res,
4262 copy->cp_synchronous);
4263 if (nfserr)
4264 return nfserr;
4265
4266 p = xdr_reserve_space(&resp->xdr, 4 + 4);
4267 *p++ = xdr_one;
4268 *p++ = cpu_to_be32(copy->cp_synchronous);
4269 return 0;
4270}
4271
4272static __be32
4273nfsd4_encode_offload_status(struct nfsd4_compoundres *resp, __be32 nfserr,
4274 struct nfsd4_offload_status *os)
4275{
4276 struct xdr_stream *xdr = &resp->xdr;
4277 __be32 *p;
4278
4279 p = xdr_reserve_space(xdr, 8 + 4);
4280 if (!p)
4281 return nfserr_resource;
4282 p = xdr_encode_hyper(p, os->count);
4283 *p++ = cpu_to_be32(0);
4284
4285 return nfserr;
4286}
4287
4288static __be32
4289nfsd4_encode_seek(struct nfsd4_compoundres *resp, __be32 nfserr,
4290 struct nfsd4_seek *seek)
4291{
4292 __be32 *p;
4293
4294 p = xdr_reserve_space(&resp->xdr, 4 + 8);
4295 *p++ = cpu_to_be32(seek->seek_eof);
4296 p = xdr_encode_hyper(p, seek->seek_pos);
4297
4298 return 0;
4299}
4300
4301static __be32
4302nfsd4_encode_noop(struct nfsd4_compoundres *resp, __be32 nfserr, void *p)
4303{
4304 return nfserr;
4305}
4306
4307typedef __be32(* nfsd4_enc)(struct nfsd4_compoundres *, __be32, void *);
4308
4309
4310
4311
4312
4313
4314static const nfsd4_enc nfsd4_enc_ops[] = {
4315 [OP_ACCESS] = (nfsd4_enc)nfsd4_encode_access,
4316 [OP_CLOSE] = (nfsd4_enc)nfsd4_encode_close,
4317 [OP_COMMIT] = (nfsd4_enc)nfsd4_encode_commit,
4318 [OP_CREATE] = (nfsd4_enc)nfsd4_encode_create,
4319 [OP_DELEGPURGE] = (nfsd4_enc)nfsd4_encode_noop,
4320 [OP_DELEGRETURN] = (nfsd4_enc)nfsd4_encode_noop,
4321 [OP_GETATTR] = (nfsd4_enc)nfsd4_encode_getattr,
4322 [OP_GETFH] = (nfsd4_enc)nfsd4_encode_getfh,
4323 [OP_LINK] = (nfsd4_enc)nfsd4_encode_link,
4324 [OP_LOCK] = (nfsd4_enc)nfsd4_encode_lock,
4325 [OP_LOCKT] = (nfsd4_enc)nfsd4_encode_lockt,
4326 [OP_LOCKU] = (nfsd4_enc)nfsd4_encode_locku,
4327 [OP_LOOKUP] = (nfsd4_enc)nfsd4_encode_noop,
4328 [OP_LOOKUPP] = (nfsd4_enc)nfsd4_encode_noop,
4329 [OP_NVERIFY] = (nfsd4_enc)nfsd4_encode_noop,
4330 [OP_OPEN] = (nfsd4_enc)nfsd4_encode_open,
4331 [OP_OPENATTR] = (nfsd4_enc)nfsd4_encode_noop,
4332 [OP_OPEN_CONFIRM] = (nfsd4_enc)nfsd4_encode_open_confirm,
4333 [OP_OPEN_DOWNGRADE] = (nfsd4_enc)nfsd4_encode_open_downgrade,
4334 [OP_PUTFH] = (nfsd4_enc)nfsd4_encode_noop,
4335 [OP_PUTPUBFH] = (nfsd4_enc)nfsd4_encode_noop,
4336 [OP_PUTROOTFH] = (nfsd4_enc)nfsd4_encode_noop,
4337 [OP_READ] = (nfsd4_enc)nfsd4_encode_read,
4338 [OP_READDIR] = (nfsd4_enc)nfsd4_encode_readdir,
4339 [OP_READLINK] = (nfsd4_enc)nfsd4_encode_readlink,
4340 [OP_REMOVE] = (nfsd4_enc)nfsd4_encode_remove,
4341 [OP_RENAME] = (nfsd4_enc)nfsd4_encode_rename,
4342 [OP_RENEW] = (nfsd4_enc)nfsd4_encode_noop,
4343 [OP_RESTOREFH] = (nfsd4_enc)nfsd4_encode_noop,
4344 [OP_SAVEFH] = (nfsd4_enc)nfsd4_encode_noop,
4345 [OP_SECINFO] = (nfsd4_enc)nfsd4_encode_secinfo,
4346 [OP_SETATTR] = (nfsd4_enc)nfsd4_encode_setattr,
4347 [OP_SETCLIENTID] = (nfsd4_enc)nfsd4_encode_setclientid,
4348 [OP_SETCLIENTID_CONFIRM] = (nfsd4_enc)nfsd4_encode_noop,
4349 [OP_VERIFY] = (nfsd4_enc)nfsd4_encode_noop,
4350 [OP_WRITE] = (nfsd4_enc)nfsd4_encode_write,
4351 [OP_RELEASE_LOCKOWNER] = (nfsd4_enc)nfsd4_encode_noop,
4352
4353
4354 [OP_BACKCHANNEL_CTL] = (nfsd4_enc)nfsd4_encode_noop,
4355 [OP_BIND_CONN_TO_SESSION] = (nfsd4_enc)nfsd4_encode_bind_conn_to_session,
4356 [OP_EXCHANGE_ID] = (nfsd4_enc)nfsd4_encode_exchange_id,
4357 [OP_CREATE_SESSION] = (nfsd4_enc)nfsd4_encode_create_session,
4358 [OP_DESTROY_SESSION] = (nfsd4_enc)nfsd4_encode_noop,
4359 [OP_FREE_STATEID] = (nfsd4_enc)nfsd4_encode_noop,
4360 [OP_GET_DIR_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop,
4361#ifdef CONFIG_NFSD_PNFS
4362 [OP_GETDEVICEINFO] = (nfsd4_enc)nfsd4_encode_getdeviceinfo,
4363 [OP_GETDEVICELIST] = (nfsd4_enc)nfsd4_encode_noop,
4364 [OP_LAYOUTCOMMIT] = (nfsd4_enc)nfsd4_encode_layoutcommit,
4365 [OP_LAYOUTGET] = (nfsd4_enc)nfsd4_encode_layoutget,
4366 [OP_LAYOUTRETURN] = (nfsd4_enc)nfsd4_encode_layoutreturn,
4367#else
4368 [OP_GETDEVICEINFO] = (nfsd4_enc)nfsd4_encode_noop,
4369 [OP_GETDEVICELIST] = (nfsd4_enc)nfsd4_encode_noop,
4370 [OP_LAYOUTCOMMIT] = (nfsd4_enc)nfsd4_encode_noop,
4371 [OP_LAYOUTGET] = (nfsd4_enc)nfsd4_encode_noop,
4372 [OP_LAYOUTRETURN] = (nfsd4_enc)nfsd4_encode_noop,
4373#endif
4374 [OP_SECINFO_NO_NAME] = (nfsd4_enc)nfsd4_encode_secinfo_no_name,
4375 [OP_SEQUENCE] = (nfsd4_enc)nfsd4_encode_sequence,
4376 [OP_SET_SSV] = (nfsd4_enc)nfsd4_encode_noop,
4377 [OP_TEST_STATEID] = (nfsd4_enc)nfsd4_encode_test_stateid,
4378 [OP_WANT_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop,
4379 [OP_DESTROY_CLIENTID] = (nfsd4_enc)nfsd4_encode_noop,
4380 [OP_RECLAIM_COMPLETE] = (nfsd4_enc)nfsd4_encode_noop,
4381
4382
4383 [OP_ALLOCATE] = (nfsd4_enc)nfsd4_encode_noop,
4384 [OP_COPY] = (nfsd4_enc)nfsd4_encode_copy,
4385 [OP_COPY_NOTIFY] = (nfsd4_enc)nfsd4_encode_noop,
4386 [OP_DEALLOCATE] = (nfsd4_enc)nfsd4_encode_noop,
4387 [OP_IO_ADVISE] = (nfsd4_enc)nfsd4_encode_noop,
4388 [OP_LAYOUTERROR] = (nfsd4_enc)nfsd4_encode_noop,
4389 [OP_LAYOUTSTATS] = (nfsd4_enc)nfsd4_encode_noop,
4390 [OP_OFFLOAD_CANCEL] = (nfsd4_enc)nfsd4_encode_noop,
4391 [OP_OFFLOAD_STATUS] = (nfsd4_enc)nfsd4_encode_offload_status,
4392 [OP_READ_PLUS] = (nfsd4_enc)nfsd4_encode_noop,
4393 [OP_SEEK] = (nfsd4_enc)nfsd4_encode_seek,
4394 [OP_WRITE_SAME] = (nfsd4_enc)nfsd4_encode_noop,
4395 [OP_CLONE] = (nfsd4_enc)nfsd4_encode_noop,
4396};
4397
4398
4399
4400
4401
4402
4403
4404
4405
4406
4407
4408
4409
4410
4411__be32 nfsd4_check_resp_size(struct nfsd4_compoundres *resp, u32 respsize)
4412{
4413 struct xdr_buf *buf = &resp->rqstp->rq_res;
4414 struct nfsd4_slot *slot = resp->cstate.slot;
4415
4416 if (buf->len + respsize <= buf->buflen)
4417 return nfs_ok;
4418 if (!nfsd4_has_session(&resp->cstate))
4419 return nfserr_resource;
4420 if (slot->sl_flags & NFSD4_SLOT_CACHETHIS) {
4421 WARN_ON_ONCE(1);
4422 return nfserr_rep_too_big_to_cache;
4423 }
4424 return nfserr_rep_too_big;
4425}
4426
4427void
4428nfsd4_encode_operation(struct nfsd4_compoundres *resp, struct nfsd4_op *op)
4429{
4430 struct xdr_stream *xdr = &resp->xdr;
4431 struct nfs4_stateowner *so = resp->cstate.replay_owner;
4432 struct svc_rqst *rqstp = resp->rqstp;
4433 const struct nfsd4_operation *opdesc = op->opdesc;
4434 int post_err_offset;
4435 nfsd4_enc encoder;
4436 __be32 *p;
4437
4438 p = xdr_reserve_space(xdr, 8);
4439 if (!p) {
4440 WARN_ON_ONCE(1);
4441 return;
4442 }
4443 *p++ = cpu_to_be32(op->opnum);
4444 post_err_offset = xdr->buf->len;
4445
4446 if (op->opnum == OP_ILLEGAL)
4447 goto status;
4448 if (op->status && opdesc &&
4449 !(opdesc->op_flags & OP_NONTRIVIAL_ERROR_ENCODE))
4450 goto status;
4451 BUG_ON(op->opnum < 0 || op->opnum >= ARRAY_SIZE(nfsd4_enc_ops) ||
4452 !nfsd4_enc_ops[op->opnum]);
4453 encoder = nfsd4_enc_ops[op->opnum];
4454 op->status = encoder(resp, op->status, &op->u);
4455 if (opdesc && opdesc->op_release)
4456 opdesc->op_release(&op->u);
4457 xdr_commit_encode(xdr);
4458
4459
4460 if (!op->status) {
4461 int space_needed = 0;
4462 if (!nfsd4_last_compound_op(rqstp))
4463 space_needed = COMPOUND_ERR_SLACK_SPACE;
4464 op->status = nfsd4_check_resp_size(resp, space_needed);
4465 }
4466 if (op->status == nfserr_resource && nfsd4_has_session(&resp->cstate)) {
4467 struct nfsd4_slot *slot = resp->cstate.slot;
4468
4469 if (slot->sl_flags & NFSD4_SLOT_CACHETHIS)
4470 op->status = nfserr_rep_too_big_to_cache;
4471 else
4472 op->status = nfserr_rep_too_big;
4473 }
4474 if (op->status == nfserr_resource ||
4475 op->status == nfserr_rep_too_big ||
4476 op->status == nfserr_rep_too_big_to_cache) {
4477
4478
4479
4480
4481
4482
4483
4484 warn_on_nonidempotent_op(op);
4485 xdr_truncate_encode(xdr, post_err_offset);
4486 }
4487 if (so) {
4488 int len = xdr->buf->len - post_err_offset;
4489
4490 so->so_replay.rp_status = op->status;
4491 so->so_replay.rp_buflen = len;
4492 read_bytes_from_xdr_buf(xdr->buf, post_err_offset,
4493 so->so_replay.rp_buf, len);
4494 }
4495status:
4496
4497 write_bytes_to_xdr_buf(xdr->buf, post_err_offset - 4, &op->status, 4);
4498}
4499
4500
4501
4502
4503
4504
4505
4506void
4507nfsd4_encode_replay(struct xdr_stream *xdr, struct nfsd4_op *op)
4508{
4509 __be32 *p;
4510 struct nfs4_replay *rp = op->replay;
4511
4512 BUG_ON(!rp);
4513
4514 p = xdr_reserve_space(xdr, 8 + rp->rp_buflen);
4515 if (!p) {
4516 WARN_ON_ONCE(1);
4517 return;
4518 }
4519 *p++ = cpu_to_be32(op->opnum);
4520 *p++ = rp->rp_status;
4521
4522 p = xdr_encode_opaque_fixed(p, rp->rp_buf, rp->rp_buflen);
4523}
4524
4525int
4526nfs4svc_encode_voidres(struct svc_rqst *rqstp, __be32 *p)
4527{
4528 return xdr_ressize_check(rqstp, p);
4529}
4530
4531void nfsd4_release_compoundargs(struct svc_rqst *rqstp)
4532{
4533 struct nfsd4_compoundargs *args = rqstp->rq_argp;
4534
4535 if (args->ops != args->iops) {
4536 kfree(args->ops);
4537 args->ops = args->iops;
4538 }
4539 kfree(args->tmpp);
4540 args->tmpp = NULL;
4541 while (args->to_free) {
4542 struct svcxdr_tmpbuf *tb = args->to_free;
4543 args->to_free = tb->next;
4544 kfree(tb);
4545 }
4546}
4547
4548int
4549nfs4svc_decode_compoundargs(struct svc_rqst *rqstp, __be32 *p)
4550{
4551 struct nfsd4_compoundargs *args = rqstp->rq_argp;
4552
4553 if (rqstp->rq_arg.head[0].iov_len % 4) {
4554
4555 dprintk("%s: compound not properly padded! (peeraddr=%pISc xid=0x%x)",
4556 __func__, svc_addr(rqstp), be32_to_cpu(rqstp->rq_xid));
4557 return 0;
4558 }
4559 args->p = p;
4560 args->end = rqstp->rq_arg.head[0].iov_base + rqstp->rq_arg.head[0].iov_len;
4561 args->pagelist = rqstp->rq_arg.pages;
4562 args->pagelen = rqstp->rq_arg.page_len;
4563 args->tail = false;
4564 args->tmpp = NULL;
4565 args->to_free = NULL;
4566 args->ops = args->iops;
4567 args->rqstp = rqstp;
4568
4569 return !nfsd4_decode_compound(args);
4570}
4571
4572int
4573nfs4svc_encode_compoundres(struct svc_rqst *rqstp, __be32 *p)
4574{
4575
4576
4577
4578 struct nfsd4_compoundres *resp = rqstp->rq_resp;
4579 struct xdr_buf *buf = resp->xdr.buf;
4580
4581 WARN_ON_ONCE(buf->len != buf->head[0].iov_len + buf->page_len +
4582 buf->tail[0].iov_len);
4583
4584 rqstp->rq_next_page = resp->xdr.page_ptr + 1;
4585
4586 p = resp->tagp;
4587 *p++ = htonl(resp->taglen);
4588 memcpy(p, resp->tag, resp->taglen);
4589 p += XDR_QUADLEN(resp->taglen);
4590 *p++ = htonl(resp->opcnt);
4591
4592 nfsd4_sequence_done(resp);
4593 return 1;
4594}
4595
4596
4597
4598
4599
4600
4601