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36#include <linux/fs_struct.h>
37#include <linux/file.h>
38#include <linux/slab.h>
39#include <linux/namei.h>
40#include <linux/statfs.h>
41#include <linux/utsname.h>
42#include <linux/pagemap.h>
43#include <linux/sunrpc/svcauth_gss.h>
44
45#include "idmap.h"
46#include "acl.h"
47#include "xdr4.h"
48#include "vfs.h"
49#include "state.h"
50#include "cache.h"
51#include "netns.h"
52#include "pnfs.h"
53
54#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
55#include <linux/security.h>
56#endif
57
58
59#define NFSDDBG_FACILITY NFSDDBG_XDR
60
61const u32 nfsd_suppattrs[3][3] = {
62 {NFSD4_SUPPORTED_ATTRS_WORD0,
63 NFSD4_SUPPORTED_ATTRS_WORD1,
64 NFSD4_SUPPORTED_ATTRS_WORD2},
65
66 {NFSD4_1_SUPPORTED_ATTRS_WORD0,
67 NFSD4_1_SUPPORTED_ATTRS_WORD1,
68 NFSD4_1_SUPPORTED_ATTRS_WORD2},
69
70 {NFSD4_1_SUPPORTED_ATTRS_WORD0,
71 NFSD4_1_SUPPORTED_ATTRS_WORD1,
72 NFSD4_2_SUPPORTED_ATTRS_WORD2},
73};
74
75
76
77
78
79
80#define NFS4_REFERRAL_FSID_MAJOR 0x8000000ULL
81#define NFS4_REFERRAL_FSID_MINOR 0x8000000ULL
82
83static __be32
84check_filename(char *str, int len)
85{
86 int i;
87
88 if (len == 0)
89 return nfserr_inval;
90 if (isdotent(str, len))
91 return nfserr_badname;
92 for (i = 0; i < len; i++)
93 if (str[i] == '/')
94 return nfserr_badname;
95 return 0;
96}
97
98#define DECODE_HEAD \
99 __be32 *p; \
100 __be32 status
101#define DECODE_TAIL \
102 status = 0; \
103out: \
104 return status; \
105xdr_error: \
106 dprintk("NFSD: xdr error (%s:%d)\n", \
107 __FILE__, __LINE__); \
108 status = nfserr_bad_xdr; \
109 goto out
110
111#define READMEM(x,nbytes) do { \
112 x = (char *)p; \
113 p += XDR_QUADLEN(nbytes); \
114} while (0)
115#define SAVEMEM(x,nbytes) do { \
116 if (!(x = (p==argp->tmp || p == argp->tmpp) ? \
117 savemem(argp, p, nbytes) : \
118 (char *)p)) { \
119 dprintk("NFSD: xdr error (%s:%d)\n", \
120 __FILE__, __LINE__); \
121 goto xdr_error; \
122 } \
123 p += XDR_QUADLEN(nbytes); \
124} while (0)
125#define COPYMEM(x,nbytes) do { \
126 memcpy((x), p, nbytes); \
127 p += XDR_QUADLEN(nbytes); \
128} while (0)
129
130
131#define READ_BUF(nbytes) do { \
132 if (nbytes <= (u32)((char *)argp->end - (char *)argp->p)) { \
133 p = argp->p; \
134 argp->p += XDR_QUADLEN(nbytes); \
135 } else if (!(p = read_buf(argp, nbytes))) { \
136 dprintk("NFSD: xdr error (%s:%d)\n", \
137 __FILE__, __LINE__); \
138 goto xdr_error; \
139 } \
140} while (0)
141
142static void next_decode_page(struct nfsd4_compoundargs *argp)
143{
144 argp->p = page_address(argp->pagelist[0]);
145 argp->pagelist++;
146 if (argp->pagelen < PAGE_SIZE) {
147 argp->end = argp->p + (argp->pagelen>>2);
148 argp->pagelen = 0;
149 } else {
150 argp->end = argp->p + (PAGE_SIZE>>2);
151 argp->pagelen -= PAGE_SIZE;
152 }
153}
154
155static __be32 *read_buf(struct nfsd4_compoundargs *argp, u32 nbytes)
156{
157
158
159
160 unsigned int avail = (char *)argp->end - (char *)argp->p;
161 __be32 *p;
162 if (avail + argp->pagelen < nbytes)
163 return NULL;
164 if (avail + PAGE_SIZE < nbytes)
165 return NULL;
166
167 if (nbytes <= sizeof(argp->tmp))
168 p = argp->tmp;
169 else {
170 kfree(argp->tmpp);
171 p = argp->tmpp = kmalloc(nbytes, GFP_KERNEL);
172 if (!p)
173 return NULL;
174
175 }
176
177
178
179
180
181 memcpy(p, argp->p, avail);
182 next_decode_page(argp);
183 memcpy(((char*)p)+avail, argp->p, (nbytes - avail));
184 argp->p += XDR_QUADLEN(nbytes - avail);
185 return p;
186}
187
188static int zero_clientid(clientid_t *clid)
189{
190 return (clid->cl_boot == 0) && (clid->cl_id == 0);
191}
192
193
194
195
196
197
198
199
200
201static void *
202svcxdr_tmpalloc(struct nfsd4_compoundargs *argp, u32 len)
203{
204 struct svcxdr_tmpbuf *tb;
205
206 tb = kmalloc(sizeof(*tb) + len, GFP_KERNEL);
207 if (!tb)
208 return NULL;
209 tb->next = argp->to_free;
210 argp->to_free = tb;
211 return tb->buf;
212}
213
214
215
216
217
218
219
220
221static char *
222svcxdr_dupstr(struct nfsd4_compoundargs *argp, void *buf, u32 len)
223{
224 char *p = svcxdr_tmpalloc(argp, len + 1);
225
226 if (!p)
227 return NULL;
228 memcpy(p, buf, len);
229 p[len] = '\0';
230 return p;
231}
232
233
234
235
236
237
238
239
240
241
242
243static char *savemem(struct nfsd4_compoundargs *argp, __be32 *p, int nbytes)
244{
245 void *ret;
246
247 ret = svcxdr_tmpalloc(argp, nbytes);
248 if (!ret)
249 return NULL;
250 memcpy(ret, p, nbytes);
251 return ret;
252}
253
254
255
256
257
258static __be32
259nfsd4_decode_time(struct nfsd4_compoundargs *argp, struct timespec *tv)
260{
261 DECODE_HEAD;
262 u64 sec;
263
264 READ_BUF(12);
265 p = xdr_decode_hyper(p, &sec);
266 tv->tv_sec = sec;
267 tv->tv_nsec = be32_to_cpup(p++);
268 if (tv->tv_nsec >= (u32)1000000000)
269 return nfserr_inval;
270
271 DECODE_TAIL;
272}
273
274static __be32
275nfsd4_decode_bitmap(struct nfsd4_compoundargs *argp, u32 *bmval)
276{
277 u32 bmlen;
278 DECODE_HEAD;
279
280 bmval[0] = 0;
281 bmval[1] = 0;
282 bmval[2] = 0;
283
284 READ_BUF(4);
285 bmlen = be32_to_cpup(p++);
286 if (bmlen > 1000)
287 goto xdr_error;
288
289 READ_BUF(bmlen << 2);
290 if (bmlen > 0)
291 bmval[0] = be32_to_cpup(p++);
292 if (bmlen > 1)
293 bmval[1] = be32_to_cpup(p++);
294 if (bmlen > 2)
295 bmval[2] = be32_to_cpup(p++);
296
297 DECODE_TAIL;
298}
299
300static __be32
301nfsd4_decode_fattr(struct nfsd4_compoundargs *argp, u32 *bmval,
302 struct iattr *iattr, struct nfs4_acl **acl,
303 struct xdr_netobj *label, int *umask)
304{
305 int expected_len, len = 0;
306 u32 dummy32;
307 char *buf;
308
309 DECODE_HEAD;
310 iattr->ia_valid = 0;
311 if ((status = nfsd4_decode_bitmap(argp, bmval)))
312 return status;
313
314 if (bmval[0] & ~NFSD_WRITEABLE_ATTRS_WORD0
315 || bmval[1] & ~NFSD_WRITEABLE_ATTRS_WORD1
316 || bmval[2] & ~NFSD_WRITEABLE_ATTRS_WORD2) {
317 if (nfsd_attrs_supported(argp->minorversion, bmval))
318 return nfserr_inval;
319 return nfserr_attrnotsupp;
320 }
321
322 READ_BUF(4);
323 expected_len = be32_to_cpup(p++);
324
325 if (bmval[0] & FATTR4_WORD0_SIZE) {
326 READ_BUF(8);
327 len += 8;
328 p = xdr_decode_hyper(p, &iattr->ia_size);
329 iattr->ia_valid |= ATTR_SIZE;
330 }
331 if (bmval[0] & FATTR4_WORD0_ACL) {
332 u32 nace;
333 struct nfs4_ace *ace;
334
335 READ_BUF(4); len += 4;
336 nace = be32_to_cpup(p++);
337
338 if (nace > NFS4_ACL_MAX)
339 return nfserr_fbig;
340
341 *acl = svcxdr_tmpalloc(argp, nfs4_acl_bytes(nace));
342 if (*acl == NULL)
343 return nfserr_jukebox;
344
345 (*acl)->naces = nace;
346 for (ace = (*acl)->aces; ace < (*acl)->aces + nace; ace++) {
347 READ_BUF(16); len += 16;
348 ace->type = be32_to_cpup(p++);
349 ace->flag = be32_to_cpup(p++);
350 ace->access_mask = be32_to_cpup(p++);
351 dummy32 = be32_to_cpup(p++);
352 READ_BUF(dummy32);
353 len += XDR_QUADLEN(dummy32) << 2;
354 READMEM(buf, dummy32);
355 ace->whotype = nfs4_acl_get_whotype(buf, dummy32);
356 status = nfs_ok;
357 if (ace->whotype != NFS4_ACL_WHO_NAMED)
358 ;
359 else if (ace->flag & NFS4_ACE_IDENTIFIER_GROUP)
360 status = nfsd_map_name_to_gid(argp->rqstp,
361 buf, dummy32, &ace->who_gid);
362 else
363 status = nfsd_map_name_to_uid(argp->rqstp,
364 buf, dummy32, &ace->who_uid);
365 if (status)
366 return status;
367 }
368 } else
369 *acl = NULL;
370 if (bmval[1] & FATTR4_WORD1_MODE) {
371 READ_BUF(4);
372 len += 4;
373 iattr->ia_mode = be32_to_cpup(p++);
374 iattr->ia_mode &= (S_IFMT | S_IALLUGO);
375 iattr->ia_valid |= ATTR_MODE;
376 }
377 if (bmval[1] & FATTR4_WORD1_OWNER) {
378 READ_BUF(4);
379 len += 4;
380 dummy32 = be32_to_cpup(p++);
381 READ_BUF(dummy32);
382 len += (XDR_QUADLEN(dummy32) << 2);
383 READMEM(buf, dummy32);
384 if ((status = nfsd_map_name_to_uid(argp->rqstp, buf, dummy32, &iattr->ia_uid)))
385 return status;
386 iattr->ia_valid |= ATTR_UID;
387 }
388 if (bmval[1] & FATTR4_WORD1_OWNER_GROUP) {
389 READ_BUF(4);
390 len += 4;
391 dummy32 = be32_to_cpup(p++);
392 READ_BUF(dummy32);
393 len += (XDR_QUADLEN(dummy32) << 2);
394 READMEM(buf, dummy32);
395 if ((status = nfsd_map_name_to_gid(argp->rqstp, buf, dummy32, &iattr->ia_gid)))
396 return status;
397 iattr->ia_valid |= ATTR_GID;
398 }
399 if (bmval[1] & FATTR4_WORD1_TIME_ACCESS_SET) {
400 READ_BUF(4);
401 len += 4;
402 dummy32 = be32_to_cpup(p++);
403 switch (dummy32) {
404 case NFS4_SET_TO_CLIENT_TIME:
405 len += 12;
406 status = nfsd4_decode_time(argp, &iattr->ia_atime);
407 if (status)
408 return status;
409 iattr->ia_valid |= (ATTR_ATIME | ATTR_ATIME_SET);
410 break;
411 case NFS4_SET_TO_SERVER_TIME:
412 iattr->ia_valid |= ATTR_ATIME;
413 break;
414 default:
415 goto xdr_error;
416 }
417 }
418 if (bmval[1] & FATTR4_WORD1_TIME_MODIFY_SET) {
419 READ_BUF(4);
420 len += 4;
421 dummy32 = be32_to_cpup(p++);
422 switch (dummy32) {
423 case NFS4_SET_TO_CLIENT_TIME:
424 len += 12;
425 status = nfsd4_decode_time(argp, &iattr->ia_mtime);
426 if (status)
427 return status;
428 iattr->ia_valid |= (ATTR_MTIME | ATTR_MTIME_SET);
429 break;
430 case NFS4_SET_TO_SERVER_TIME:
431 iattr->ia_valid |= ATTR_MTIME;
432 break;
433 default:
434 goto xdr_error;
435 }
436 }
437
438 label->len = 0;
439#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
440 if (bmval[2] & FATTR4_WORD2_SECURITY_LABEL) {
441 READ_BUF(4);
442 len += 4;
443 dummy32 = be32_to_cpup(p++);
444 READ_BUF(4);
445 len += 4;
446 dummy32 = be32_to_cpup(p++);
447 READ_BUF(4);
448 len += 4;
449 dummy32 = be32_to_cpup(p++);
450 READ_BUF(dummy32);
451 if (dummy32 > NFS4_MAXLABELLEN)
452 return nfserr_badlabel;
453 len += (XDR_QUADLEN(dummy32) << 2);
454 READMEM(buf, dummy32);
455 label->len = dummy32;
456 label->data = svcxdr_dupstr(argp, buf, dummy32);
457 if (!label->data)
458 return nfserr_jukebox;
459 }
460#endif
461 if (bmval[2] & FATTR4_WORD2_MODE_UMASK) {
462 if (!umask)
463 goto xdr_error;
464 READ_BUF(8);
465 len += 8;
466 dummy32 = be32_to_cpup(p++);
467 iattr->ia_mode = dummy32 & (S_IFMT | S_IALLUGO);
468 dummy32 = be32_to_cpup(p++);
469 *umask = dummy32 & S_IRWXUGO;
470 iattr->ia_valid |= ATTR_MODE;
471 }
472 if (len != expected_len)
473 goto xdr_error;
474
475 DECODE_TAIL;
476}
477
478static __be32
479nfsd4_decode_stateid(struct nfsd4_compoundargs *argp, stateid_t *sid)
480{
481 DECODE_HEAD;
482
483 READ_BUF(sizeof(stateid_t));
484 sid->si_generation = be32_to_cpup(p++);
485 COPYMEM(&sid->si_opaque, sizeof(stateid_opaque_t));
486
487 DECODE_TAIL;
488}
489
490static __be32
491nfsd4_decode_access(struct nfsd4_compoundargs *argp, struct nfsd4_access *access)
492{
493 DECODE_HEAD;
494
495 READ_BUF(4);
496 access->ac_req_access = be32_to_cpup(p++);
497
498 DECODE_TAIL;
499}
500
501static __be32 nfsd4_decode_cb_sec(struct nfsd4_compoundargs *argp, struct nfsd4_cb_sec *cbs)
502{
503 DECODE_HEAD;
504 u32 dummy, uid, gid;
505 char *machine_name;
506 int i;
507 int nr_secflavs;
508
509
510 READ_BUF(4);
511 nr_secflavs = be32_to_cpup(p++);
512 if (nr_secflavs)
513 cbs->flavor = (u32)(-1);
514 else
515
516 cbs->flavor = 0;
517 for (i = 0; i < nr_secflavs; ++i) {
518 READ_BUF(4);
519 dummy = be32_to_cpup(p++);
520 switch (dummy) {
521 case RPC_AUTH_NULL:
522
523 if (cbs->flavor == (u32)(-1))
524 cbs->flavor = RPC_AUTH_NULL;
525 break;
526 case RPC_AUTH_UNIX:
527 READ_BUF(8);
528
529 dummy = be32_to_cpup(p++);
530
531
532 dummy = be32_to_cpup(p++);
533 READ_BUF(dummy);
534 SAVEMEM(machine_name, dummy);
535
536
537 READ_BUF(8);
538 uid = be32_to_cpup(p++);
539 gid = be32_to_cpup(p++);
540
541
542 READ_BUF(4);
543 dummy = be32_to_cpup(p++);
544 READ_BUF(dummy * 4);
545 if (cbs->flavor == (u32)(-1)) {
546 kuid_t kuid = make_kuid(&init_user_ns, uid);
547 kgid_t kgid = make_kgid(&init_user_ns, gid);
548 if (uid_valid(kuid) && gid_valid(kgid)) {
549 cbs->uid = kuid;
550 cbs->gid = kgid;
551 cbs->flavor = RPC_AUTH_UNIX;
552 } else {
553 dprintk("RPC_AUTH_UNIX with invalid"
554 "uid or gid ignoring!\n");
555 }
556 }
557 break;
558 case RPC_AUTH_GSS:
559 dprintk("RPC_AUTH_GSS callback secflavor "
560 "not supported!\n");
561 READ_BUF(8);
562
563 dummy = be32_to_cpup(p++);
564
565 dummy = be32_to_cpup(p++);
566 READ_BUF(dummy);
567 p += XDR_QUADLEN(dummy);
568
569 READ_BUF(4);
570 dummy = be32_to_cpup(p++);
571 READ_BUF(dummy);
572 break;
573 default:
574 dprintk("Illegal callback secflavor\n");
575 return nfserr_inval;
576 }
577 }
578 DECODE_TAIL;
579}
580
581static __be32 nfsd4_decode_backchannel_ctl(struct nfsd4_compoundargs *argp, struct nfsd4_backchannel_ctl *bc)
582{
583 DECODE_HEAD;
584
585 READ_BUF(4);
586 bc->bc_cb_program = be32_to_cpup(p++);
587 nfsd4_decode_cb_sec(argp, &bc->bc_cb_sec);
588
589 DECODE_TAIL;
590}
591
592static __be32 nfsd4_decode_bind_conn_to_session(struct nfsd4_compoundargs *argp, struct nfsd4_bind_conn_to_session *bcts)
593{
594 DECODE_HEAD;
595
596 READ_BUF(NFS4_MAX_SESSIONID_LEN + 8);
597 COPYMEM(bcts->sessionid.data, NFS4_MAX_SESSIONID_LEN);
598 bcts->dir = be32_to_cpup(p++);
599
600
601 DECODE_TAIL;
602}
603
604static __be32
605nfsd4_decode_close(struct nfsd4_compoundargs *argp, struct nfsd4_close *close)
606{
607 DECODE_HEAD;
608
609 READ_BUF(4);
610 close->cl_seqid = be32_to_cpup(p++);
611 return nfsd4_decode_stateid(argp, &close->cl_stateid);
612
613 DECODE_TAIL;
614}
615
616
617static __be32
618nfsd4_decode_commit(struct nfsd4_compoundargs *argp, struct nfsd4_commit *commit)
619{
620 DECODE_HEAD;
621
622 READ_BUF(12);
623 p = xdr_decode_hyper(p, &commit->co_offset);
624 commit->co_count = be32_to_cpup(p++);
625
626 DECODE_TAIL;
627}
628
629static __be32
630nfsd4_decode_create(struct nfsd4_compoundargs *argp, struct nfsd4_create *create)
631{
632 DECODE_HEAD;
633
634 READ_BUF(4);
635 create->cr_type = be32_to_cpup(p++);
636 switch (create->cr_type) {
637 case NF4LNK:
638 READ_BUF(4);
639 create->cr_datalen = be32_to_cpup(p++);
640 READ_BUF(create->cr_datalen);
641 create->cr_data = svcxdr_dupstr(argp, p, create->cr_datalen);
642 if (!create->cr_data)
643 return nfserr_jukebox;
644 break;
645 case NF4BLK:
646 case NF4CHR:
647 READ_BUF(8);
648 create->cr_specdata1 = be32_to_cpup(p++);
649 create->cr_specdata2 = be32_to_cpup(p++);
650 break;
651 case NF4SOCK:
652 case NF4FIFO:
653 case NF4DIR:
654 default:
655 break;
656 }
657
658 READ_BUF(4);
659 create->cr_namelen = be32_to_cpup(p++);
660 READ_BUF(create->cr_namelen);
661 SAVEMEM(create->cr_name, create->cr_namelen);
662 if ((status = check_filename(create->cr_name, create->cr_namelen)))
663 return status;
664
665 status = nfsd4_decode_fattr(argp, create->cr_bmval, &create->cr_iattr,
666 &create->cr_acl, &create->cr_label,
667 ¤t->fs->umask);
668 if (status)
669 goto out;
670
671 DECODE_TAIL;
672}
673
674static inline __be32
675nfsd4_decode_delegreturn(struct nfsd4_compoundargs *argp, struct nfsd4_delegreturn *dr)
676{
677 return nfsd4_decode_stateid(argp, &dr->dr_stateid);
678}
679
680static inline __be32
681nfsd4_decode_getattr(struct nfsd4_compoundargs *argp, struct nfsd4_getattr *getattr)
682{
683 return nfsd4_decode_bitmap(argp, getattr->ga_bmval);
684}
685
686static __be32
687nfsd4_decode_link(struct nfsd4_compoundargs *argp, struct nfsd4_link *link)
688{
689 DECODE_HEAD;
690
691 READ_BUF(4);
692 link->li_namelen = be32_to_cpup(p++);
693 READ_BUF(link->li_namelen);
694 SAVEMEM(link->li_name, link->li_namelen);
695 if ((status = check_filename(link->li_name, link->li_namelen)))
696 return status;
697
698 DECODE_TAIL;
699}
700
701static __be32
702nfsd4_decode_lock(struct nfsd4_compoundargs *argp, struct nfsd4_lock *lock)
703{
704 DECODE_HEAD;
705
706
707
708
709 READ_BUF(28);
710 lock->lk_type = be32_to_cpup(p++);
711 if ((lock->lk_type < NFS4_READ_LT) || (lock->lk_type > NFS4_WRITEW_LT))
712 goto xdr_error;
713 lock->lk_reclaim = be32_to_cpup(p++);
714 p = xdr_decode_hyper(p, &lock->lk_offset);
715 p = xdr_decode_hyper(p, &lock->lk_length);
716 lock->lk_is_new = be32_to_cpup(p++);
717
718 if (lock->lk_is_new) {
719 READ_BUF(4);
720 lock->lk_new_open_seqid = be32_to_cpup(p++);
721 status = nfsd4_decode_stateid(argp, &lock->lk_new_open_stateid);
722 if (status)
723 return status;
724 READ_BUF(8 + sizeof(clientid_t));
725 lock->lk_new_lock_seqid = be32_to_cpup(p++);
726 COPYMEM(&lock->lk_new_clientid, sizeof(clientid_t));
727 lock->lk_new_owner.len = be32_to_cpup(p++);
728 READ_BUF(lock->lk_new_owner.len);
729 READMEM(lock->lk_new_owner.data, lock->lk_new_owner.len);
730 } else {
731 status = nfsd4_decode_stateid(argp, &lock->lk_old_lock_stateid);
732 if (status)
733 return status;
734 READ_BUF(4);
735 lock->lk_old_lock_seqid = be32_to_cpup(p++);
736 }
737
738 DECODE_TAIL;
739}
740
741static __be32
742nfsd4_decode_lockt(struct nfsd4_compoundargs *argp, struct nfsd4_lockt *lockt)
743{
744 DECODE_HEAD;
745
746 READ_BUF(32);
747 lockt->lt_type = be32_to_cpup(p++);
748 if((lockt->lt_type < NFS4_READ_LT) || (lockt->lt_type > NFS4_WRITEW_LT))
749 goto xdr_error;
750 p = xdr_decode_hyper(p, &lockt->lt_offset);
751 p = xdr_decode_hyper(p, &lockt->lt_length);
752 COPYMEM(&lockt->lt_clientid, 8);
753 lockt->lt_owner.len = be32_to_cpup(p++);
754 READ_BUF(lockt->lt_owner.len);
755 READMEM(lockt->lt_owner.data, lockt->lt_owner.len);
756
757 DECODE_TAIL;
758}
759
760static __be32
761nfsd4_decode_locku(struct nfsd4_compoundargs *argp, struct nfsd4_locku *locku)
762{
763 DECODE_HEAD;
764
765 READ_BUF(8);
766 locku->lu_type = be32_to_cpup(p++);
767 if ((locku->lu_type < NFS4_READ_LT) || (locku->lu_type > NFS4_WRITEW_LT))
768 goto xdr_error;
769 locku->lu_seqid = be32_to_cpup(p++);
770 status = nfsd4_decode_stateid(argp, &locku->lu_stateid);
771 if (status)
772 return status;
773 READ_BUF(16);
774 p = xdr_decode_hyper(p, &locku->lu_offset);
775 p = xdr_decode_hyper(p, &locku->lu_length);
776
777 DECODE_TAIL;
778}
779
780static __be32
781nfsd4_decode_lookup(struct nfsd4_compoundargs *argp, struct nfsd4_lookup *lookup)
782{
783 DECODE_HEAD;
784
785 READ_BUF(4);
786 lookup->lo_len = be32_to_cpup(p++);
787 READ_BUF(lookup->lo_len);
788 SAVEMEM(lookup->lo_name, lookup->lo_len);
789 if ((status = check_filename(lookup->lo_name, lookup->lo_len)))
790 return status;
791
792 DECODE_TAIL;
793}
794
795static __be32 nfsd4_decode_share_access(struct nfsd4_compoundargs *argp, u32 *share_access, u32 *deleg_want, u32 *deleg_when)
796{
797 __be32 *p;
798 u32 w;
799
800 READ_BUF(4);
801 w = be32_to_cpup(p++);
802 *share_access = w & NFS4_SHARE_ACCESS_MASK;
803 *deleg_want = w & NFS4_SHARE_WANT_MASK;
804 if (deleg_when)
805 *deleg_when = w & NFS4_SHARE_WHEN_MASK;
806
807 switch (w & NFS4_SHARE_ACCESS_MASK) {
808 case NFS4_SHARE_ACCESS_READ:
809 case NFS4_SHARE_ACCESS_WRITE:
810 case NFS4_SHARE_ACCESS_BOTH:
811 break;
812 default:
813 return nfserr_bad_xdr;
814 }
815 w &= ~NFS4_SHARE_ACCESS_MASK;
816 if (!w)
817 return nfs_ok;
818 if (!argp->minorversion)
819 return nfserr_bad_xdr;
820 switch (w & NFS4_SHARE_WANT_MASK) {
821 case NFS4_SHARE_WANT_NO_PREFERENCE:
822 case NFS4_SHARE_WANT_READ_DELEG:
823 case NFS4_SHARE_WANT_WRITE_DELEG:
824 case NFS4_SHARE_WANT_ANY_DELEG:
825 case NFS4_SHARE_WANT_NO_DELEG:
826 case NFS4_SHARE_WANT_CANCEL:
827 break;
828 default:
829 return nfserr_bad_xdr;
830 }
831 w &= ~NFS4_SHARE_WANT_MASK;
832 if (!w)
833 return nfs_ok;
834
835 if (!deleg_when)
836 return nfserr_inval;
837 switch (w) {
838 case NFS4_SHARE_SIGNAL_DELEG_WHEN_RESRC_AVAIL:
839 case NFS4_SHARE_PUSH_DELEG_WHEN_UNCONTENDED:
840 case (NFS4_SHARE_SIGNAL_DELEG_WHEN_RESRC_AVAIL |
841 NFS4_SHARE_PUSH_DELEG_WHEN_UNCONTENDED):
842 return nfs_ok;
843 }
844xdr_error:
845 return nfserr_bad_xdr;
846}
847
848static __be32 nfsd4_decode_share_deny(struct nfsd4_compoundargs *argp, u32 *x)
849{
850 __be32 *p;
851
852 READ_BUF(4);
853 *x = be32_to_cpup(p++);
854
855 if (*x & ~NFS4_SHARE_DENY_BOTH)
856 return nfserr_bad_xdr;
857 return nfs_ok;
858xdr_error:
859 return nfserr_bad_xdr;
860}
861
862static __be32 nfsd4_decode_opaque(struct nfsd4_compoundargs *argp, struct xdr_netobj *o)
863{
864 __be32 *p;
865
866 READ_BUF(4);
867 o->len = be32_to_cpup(p++);
868
869 if (o->len == 0 || o->len > NFS4_OPAQUE_LIMIT)
870 return nfserr_bad_xdr;
871
872 READ_BUF(o->len);
873 SAVEMEM(o->data, o->len);
874 return nfs_ok;
875xdr_error:
876 return nfserr_bad_xdr;
877}
878
879static __be32
880nfsd4_decode_open(struct nfsd4_compoundargs *argp, struct nfsd4_open *open)
881{
882 DECODE_HEAD;
883 u32 dummy;
884
885 memset(open->op_bmval, 0, sizeof(open->op_bmval));
886 open->op_iattr.ia_valid = 0;
887 open->op_openowner = NULL;
888
889 open->op_xdr_error = 0;
890
891 READ_BUF(4);
892 open->op_seqid = be32_to_cpup(p++);
893
894 status = nfsd4_decode_share_access(argp, &open->op_share_access,
895 &open->op_deleg_want, &dummy);
896 if (status)
897 goto xdr_error;
898 status = nfsd4_decode_share_deny(argp, &open->op_share_deny);
899 if (status)
900 goto xdr_error;
901 READ_BUF(sizeof(clientid_t));
902 COPYMEM(&open->op_clientid, sizeof(clientid_t));
903 status = nfsd4_decode_opaque(argp, &open->op_owner);
904 if (status)
905 goto xdr_error;
906 READ_BUF(4);
907 open->op_create = be32_to_cpup(p++);
908 switch (open->op_create) {
909 case NFS4_OPEN_NOCREATE:
910 break;
911 case NFS4_OPEN_CREATE:
912 current->fs->umask = 0;
913 READ_BUF(4);
914 open->op_createmode = be32_to_cpup(p++);
915 switch (open->op_createmode) {
916 case NFS4_CREATE_UNCHECKED:
917 case NFS4_CREATE_GUARDED:
918 status = nfsd4_decode_fattr(argp, open->op_bmval,
919 &open->op_iattr, &open->op_acl, &open->op_label,
920 ¤t->fs->umask);
921 if (status)
922 goto out;
923 break;
924 case NFS4_CREATE_EXCLUSIVE:
925 READ_BUF(NFS4_VERIFIER_SIZE);
926 COPYMEM(open->op_verf.data, NFS4_VERIFIER_SIZE);
927 break;
928 case NFS4_CREATE_EXCLUSIVE4_1:
929 if (argp->minorversion < 1)
930 goto xdr_error;
931 READ_BUF(NFS4_VERIFIER_SIZE);
932 COPYMEM(open->op_verf.data, NFS4_VERIFIER_SIZE);
933 status = nfsd4_decode_fattr(argp, open->op_bmval,
934 &open->op_iattr, &open->op_acl, &open->op_label,
935 ¤t->fs->umask);
936 if (status)
937 goto out;
938 break;
939 default:
940 goto xdr_error;
941 }
942 break;
943 default:
944 goto xdr_error;
945 }
946
947
948 READ_BUF(4);
949 open->op_claim_type = be32_to_cpup(p++);
950 switch (open->op_claim_type) {
951 case NFS4_OPEN_CLAIM_NULL:
952 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
953 READ_BUF(4);
954 open->op_fname.len = be32_to_cpup(p++);
955 READ_BUF(open->op_fname.len);
956 SAVEMEM(open->op_fname.data, open->op_fname.len);
957 if ((status = check_filename(open->op_fname.data, open->op_fname.len)))
958 return status;
959 break;
960 case NFS4_OPEN_CLAIM_PREVIOUS:
961 READ_BUF(4);
962 open->op_delegate_type = be32_to_cpup(p++);
963 break;
964 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
965 status = nfsd4_decode_stateid(argp, &open->op_delegate_stateid);
966 if (status)
967 return status;
968 READ_BUF(4);
969 open->op_fname.len = be32_to_cpup(p++);
970 READ_BUF(open->op_fname.len);
971 SAVEMEM(open->op_fname.data, open->op_fname.len);
972 if ((status = check_filename(open->op_fname.data, open->op_fname.len)))
973 return status;
974 break;
975 case NFS4_OPEN_CLAIM_FH:
976 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
977 if (argp->minorversion < 1)
978 goto xdr_error;
979
980 break;
981 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
982 if (argp->minorversion < 1)
983 goto xdr_error;
984 status = nfsd4_decode_stateid(argp, &open->op_delegate_stateid);
985 if (status)
986 return status;
987 break;
988 default:
989 goto xdr_error;
990 }
991
992 DECODE_TAIL;
993}
994
995static __be32
996nfsd4_decode_open_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_open_confirm *open_conf)
997{
998 DECODE_HEAD;
999
1000 if (argp->minorversion >= 1)
1001 return nfserr_notsupp;
1002
1003 status = nfsd4_decode_stateid(argp, &open_conf->oc_req_stateid);
1004 if (status)
1005 return status;
1006 READ_BUF(4);
1007 open_conf->oc_seqid = be32_to_cpup(p++);
1008
1009 DECODE_TAIL;
1010}
1011
1012static __be32
1013nfsd4_decode_open_downgrade(struct nfsd4_compoundargs *argp, struct nfsd4_open_downgrade *open_down)
1014{
1015 DECODE_HEAD;
1016
1017 status = nfsd4_decode_stateid(argp, &open_down->od_stateid);
1018 if (status)
1019 return status;
1020 READ_BUF(4);
1021 open_down->od_seqid = be32_to_cpup(p++);
1022 status = nfsd4_decode_share_access(argp, &open_down->od_share_access,
1023 &open_down->od_deleg_want, NULL);
1024 if (status)
1025 return status;
1026 status = nfsd4_decode_share_deny(argp, &open_down->od_share_deny);
1027 if (status)
1028 return status;
1029 DECODE_TAIL;
1030}
1031
1032static __be32
1033nfsd4_decode_putfh(struct nfsd4_compoundargs *argp, struct nfsd4_putfh *putfh)
1034{
1035 DECODE_HEAD;
1036
1037 READ_BUF(4);
1038 putfh->pf_fhlen = be32_to_cpup(p++);
1039 if (putfh->pf_fhlen > NFS4_FHSIZE)
1040 goto xdr_error;
1041 READ_BUF(putfh->pf_fhlen);
1042 SAVEMEM(putfh->pf_fhval, putfh->pf_fhlen);
1043
1044 DECODE_TAIL;
1045}
1046
1047static __be32
1048nfsd4_decode_putpubfh(struct nfsd4_compoundargs *argp, void *p)
1049{
1050 if (argp->minorversion == 0)
1051 return nfs_ok;
1052 return nfserr_notsupp;
1053}
1054
1055static __be32
1056nfsd4_decode_read(struct nfsd4_compoundargs *argp, struct nfsd4_read *read)
1057{
1058 DECODE_HEAD;
1059
1060 status = nfsd4_decode_stateid(argp, &read->rd_stateid);
1061 if (status)
1062 return status;
1063 READ_BUF(12);
1064 p = xdr_decode_hyper(p, &read->rd_offset);
1065 read->rd_length = be32_to_cpup(p++);
1066
1067 DECODE_TAIL;
1068}
1069
1070static __be32
1071nfsd4_decode_readdir(struct nfsd4_compoundargs *argp, struct nfsd4_readdir *readdir)
1072{
1073 DECODE_HEAD;
1074
1075 READ_BUF(24);
1076 p = xdr_decode_hyper(p, &readdir->rd_cookie);
1077 COPYMEM(readdir->rd_verf.data, sizeof(readdir->rd_verf.data));
1078 readdir->rd_dircount = be32_to_cpup(p++);
1079 readdir->rd_maxcount = be32_to_cpup(p++);
1080 if ((status = nfsd4_decode_bitmap(argp, readdir->rd_bmval)))
1081 goto out;
1082
1083 DECODE_TAIL;
1084}
1085
1086static __be32
1087nfsd4_decode_remove(struct nfsd4_compoundargs *argp, struct nfsd4_remove *remove)
1088{
1089 DECODE_HEAD;
1090
1091 READ_BUF(4);
1092 remove->rm_namelen = be32_to_cpup(p++);
1093 READ_BUF(remove->rm_namelen);
1094 SAVEMEM(remove->rm_name, remove->rm_namelen);
1095 if ((status = check_filename(remove->rm_name, remove->rm_namelen)))
1096 return status;
1097
1098 DECODE_TAIL;
1099}
1100
1101static __be32
1102nfsd4_decode_rename(struct nfsd4_compoundargs *argp, struct nfsd4_rename *rename)
1103{
1104 DECODE_HEAD;
1105
1106 READ_BUF(4);
1107 rename->rn_snamelen = be32_to_cpup(p++);
1108 READ_BUF(rename->rn_snamelen);
1109 SAVEMEM(rename->rn_sname, rename->rn_snamelen);
1110 READ_BUF(4);
1111 rename->rn_tnamelen = be32_to_cpup(p++);
1112 READ_BUF(rename->rn_tnamelen);
1113 SAVEMEM(rename->rn_tname, rename->rn_tnamelen);
1114 if ((status = check_filename(rename->rn_sname, rename->rn_snamelen)))
1115 return status;
1116 if ((status = check_filename(rename->rn_tname, rename->rn_tnamelen)))
1117 return status;
1118
1119 DECODE_TAIL;
1120}
1121
1122static __be32
1123nfsd4_decode_renew(struct nfsd4_compoundargs *argp, clientid_t *clientid)
1124{
1125 DECODE_HEAD;
1126
1127 if (argp->minorversion >= 1)
1128 return nfserr_notsupp;
1129
1130 READ_BUF(sizeof(clientid_t));
1131 COPYMEM(clientid, sizeof(clientid_t));
1132
1133 DECODE_TAIL;
1134}
1135
1136static __be32
1137nfsd4_decode_secinfo(struct nfsd4_compoundargs *argp,
1138 struct nfsd4_secinfo *secinfo)
1139{
1140 DECODE_HEAD;
1141
1142 READ_BUF(4);
1143 secinfo->si_namelen = be32_to_cpup(p++);
1144 READ_BUF(secinfo->si_namelen);
1145 SAVEMEM(secinfo->si_name, secinfo->si_namelen);
1146 status = check_filename(secinfo->si_name, secinfo->si_namelen);
1147 if (status)
1148 return status;
1149 DECODE_TAIL;
1150}
1151
1152static __be32
1153nfsd4_decode_secinfo_no_name(struct nfsd4_compoundargs *argp,
1154 struct nfsd4_secinfo_no_name *sin)
1155{
1156 DECODE_HEAD;
1157
1158 READ_BUF(4);
1159 sin->sin_style = be32_to_cpup(p++);
1160 DECODE_TAIL;
1161}
1162
1163static __be32
1164nfsd4_decode_setattr(struct nfsd4_compoundargs *argp, struct nfsd4_setattr *setattr)
1165{
1166 __be32 status;
1167
1168 status = nfsd4_decode_stateid(argp, &setattr->sa_stateid);
1169 if (status)
1170 return status;
1171 return nfsd4_decode_fattr(argp, setattr->sa_bmval, &setattr->sa_iattr,
1172 &setattr->sa_acl, &setattr->sa_label, NULL);
1173}
1174
1175static __be32
1176nfsd4_decode_setclientid(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid *setclientid)
1177{
1178 DECODE_HEAD;
1179
1180 if (argp->minorversion >= 1)
1181 return nfserr_notsupp;
1182
1183 READ_BUF(NFS4_VERIFIER_SIZE);
1184 COPYMEM(setclientid->se_verf.data, NFS4_VERIFIER_SIZE);
1185
1186 status = nfsd4_decode_opaque(argp, &setclientid->se_name);
1187 if (status)
1188 return nfserr_bad_xdr;
1189 READ_BUF(8);
1190 setclientid->se_callback_prog = be32_to_cpup(p++);
1191 setclientid->se_callback_netid_len = be32_to_cpup(p++);
1192 READ_BUF(setclientid->se_callback_netid_len);
1193 SAVEMEM(setclientid->se_callback_netid_val, setclientid->se_callback_netid_len);
1194 READ_BUF(4);
1195 setclientid->se_callback_addr_len = be32_to_cpup(p++);
1196
1197 READ_BUF(setclientid->se_callback_addr_len);
1198 SAVEMEM(setclientid->se_callback_addr_val, setclientid->se_callback_addr_len);
1199 READ_BUF(4);
1200 setclientid->se_callback_ident = be32_to_cpup(p++);
1201
1202 DECODE_TAIL;
1203}
1204
1205static __be32
1206nfsd4_decode_setclientid_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid_confirm *scd_c)
1207{
1208 DECODE_HEAD;
1209
1210 if (argp->minorversion >= 1)
1211 return nfserr_notsupp;
1212
1213 READ_BUF(8 + NFS4_VERIFIER_SIZE);
1214 COPYMEM(&scd_c->sc_clientid, 8);
1215 COPYMEM(&scd_c->sc_confirm, NFS4_VERIFIER_SIZE);
1216
1217 DECODE_TAIL;
1218}
1219
1220
1221static __be32
1222nfsd4_decode_verify(struct nfsd4_compoundargs *argp, struct nfsd4_verify *verify)
1223{
1224 DECODE_HEAD;
1225
1226 if ((status = nfsd4_decode_bitmap(argp, verify->ve_bmval)))
1227 goto out;
1228
1229
1230
1231
1232 READ_BUF(4);
1233 verify->ve_attrlen = be32_to_cpup(p++);
1234 READ_BUF(verify->ve_attrlen);
1235 SAVEMEM(verify->ve_attrval, verify->ve_attrlen);
1236
1237 DECODE_TAIL;
1238}
1239
1240static __be32
1241nfsd4_decode_write(struct nfsd4_compoundargs *argp, struct nfsd4_write *write)
1242{
1243 int avail;
1244 int len;
1245 DECODE_HEAD;
1246
1247 status = nfsd4_decode_stateid(argp, &write->wr_stateid);
1248 if (status)
1249 return status;
1250 READ_BUF(16);
1251 p = xdr_decode_hyper(p, &write->wr_offset);
1252 write->wr_stable_how = be32_to_cpup(p++);
1253 if (write->wr_stable_how > NFS_FILE_SYNC)
1254 goto xdr_error;
1255 write->wr_buflen = be32_to_cpup(p++);
1256
1257
1258
1259
1260
1261 avail = (char*)argp->end - (char*)argp->p;
1262 if (avail + argp->pagelen < write->wr_buflen) {
1263 dprintk("NFSD: xdr error (%s:%d)\n",
1264 __FILE__, __LINE__);
1265 goto xdr_error;
1266 }
1267 write->wr_head.iov_base = p;
1268 write->wr_head.iov_len = avail;
1269 write->wr_pagelist = argp->pagelist;
1270
1271 len = XDR_QUADLEN(write->wr_buflen) << 2;
1272 if (len >= avail) {
1273 int pages;
1274
1275 len -= avail;
1276
1277 pages = len >> PAGE_SHIFT;
1278 argp->pagelist += pages;
1279 argp->pagelen -= pages * PAGE_SIZE;
1280 len -= pages * PAGE_SIZE;
1281
1282 argp->p = (__be32 *)page_address(argp->pagelist[0]);
1283 argp->pagelist++;
1284 argp->end = argp->p + XDR_QUADLEN(PAGE_SIZE);
1285 }
1286 argp->p += XDR_QUADLEN(len);
1287
1288 DECODE_TAIL;
1289}
1290
1291static __be32
1292nfsd4_decode_release_lockowner(struct nfsd4_compoundargs *argp, struct nfsd4_release_lockowner *rlockowner)
1293{
1294 DECODE_HEAD;
1295
1296 if (argp->minorversion >= 1)
1297 return nfserr_notsupp;
1298
1299 READ_BUF(12);
1300 COPYMEM(&rlockowner->rl_clientid, sizeof(clientid_t));
1301 rlockowner->rl_owner.len = be32_to_cpup(p++);
1302 READ_BUF(rlockowner->rl_owner.len);
1303 READMEM(rlockowner->rl_owner.data, rlockowner->rl_owner.len);
1304
1305 if (argp->minorversion && !zero_clientid(&rlockowner->rl_clientid))
1306 return nfserr_inval;
1307 DECODE_TAIL;
1308}
1309
1310static __be32
1311nfsd4_decode_exchange_id(struct nfsd4_compoundargs *argp,
1312 struct nfsd4_exchange_id *exid)
1313{
1314 int dummy, tmp;
1315 DECODE_HEAD;
1316
1317 READ_BUF(NFS4_VERIFIER_SIZE);
1318 COPYMEM(exid->verifier.data, NFS4_VERIFIER_SIZE);
1319
1320 status = nfsd4_decode_opaque(argp, &exid->clname);
1321 if (status)
1322 return nfserr_bad_xdr;
1323
1324 READ_BUF(4);
1325 exid->flags = be32_to_cpup(p++);
1326
1327
1328 READ_BUF(4);
1329 exid->spa_how = be32_to_cpup(p++);
1330 switch (exid->spa_how) {
1331 case SP4_NONE:
1332 break;
1333 case SP4_MACH_CRED:
1334
1335 status = nfsd4_decode_bitmap(argp,
1336 exid->spo_must_enforce);
1337 if (status)
1338 goto out;
1339
1340 status = nfsd4_decode_bitmap(argp, exid->spo_must_allow);
1341 if (status)
1342 goto out;
1343 break;
1344 case SP4_SSV:
1345
1346 READ_BUF(4);
1347 dummy = be32_to_cpup(p++);
1348 READ_BUF(dummy * 4);
1349 p += dummy;
1350
1351 READ_BUF(4);
1352 dummy = be32_to_cpup(p++);
1353 READ_BUF(dummy * 4);
1354 p += dummy;
1355
1356
1357 READ_BUF(4);
1358 tmp = be32_to_cpup(p++);
1359 while (tmp--) {
1360 READ_BUF(4);
1361 dummy = be32_to_cpup(p++);
1362 READ_BUF(dummy);
1363 p += XDR_QUADLEN(dummy);
1364 }
1365
1366
1367 READ_BUF(4);
1368 tmp = be32_to_cpup(p++);
1369 while (tmp--) {
1370 READ_BUF(4);
1371 dummy = be32_to_cpup(p++);
1372 READ_BUF(dummy);
1373 p += XDR_QUADLEN(dummy);
1374 }
1375
1376
1377 READ_BUF(8);
1378 dummy = be32_to_cpup(p++);
1379 dummy = be32_to_cpup(p++);
1380 break;
1381 default:
1382 goto xdr_error;
1383 }
1384
1385
1386 READ_BUF(4);
1387 dummy = be32_to_cpup(p++);
1388
1389 if (dummy > 1)
1390 goto xdr_error;
1391
1392 if (dummy == 1) {
1393
1394 READ_BUF(4);
1395 dummy = be32_to_cpup(p++);
1396 READ_BUF(dummy);
1397 p += XDR_QUADLEN(dummy);
1398
1399
1400 READ_BUF(4);
1401 dummy = be32_to_cpup(p++);
1402 READ_BUF(dummy);
1403 p += XDR_QUADLEN(dummy);
1404
1405
1406 READ_BUF(12);
1407 p += 3;
1408 }
1409 DECODE_TAIL;
1410}
1411
1412static __be32
1413nfsd4_decode_create_session(struct nfsd4_compoundargs *argp,
1414 struct nfsd4_create_session *sess)
1415{
1416 DECODE_HEAD;
1417 u32 dummy;
1418
1419 READ_BUF(16);
1420 COPYMEM(&sess->clientid, 8);
1421 sess->seqid = be32_to_cpup(p++);
1422 sess->flags = be32_to_cpup(p++);
1423
1424
1425 READ_BUF(28);
1426 dummy = be32_to_cpup(p++);
1427 sess->fore_channel.maxreq_sz = be32_to_cpup(p++);
1428 sess->fore_channel.maxresp_sz = be32_to_cpup(p++);
1429 sess->fore_channel.maxresp_cached = be32_to_cpup(p++);
1430 sess->fore_channel.maxops = be32_to_cpup(p++);
1431 sess->fore_channel.maxreqs = be32_to_cpup(p++);
1432 sess->fore_channel.nr_rdma_attrs = be32_to_cpup(p++);
1433 if (sess->fore_channel.nr_rdma_attrs == 1) {
1434 READ_BUF(4);
1435 sess->fore_channel.rdma_attrs = be32_to_cpup(p++);
1436 } else if (sess->fore_channel.nr_rdma_attrs > 1) {
1437 dprintk("Too many fore channel attr bitmaps!\n");
1438 goto xdr_error;
1439 }
1440
1441
1442 READ_BUF(28);
1443 dummy = be32_to_cpup(p++);
1444 sess->back_channel.maxreq_sz = be32_to_cpup(p++);
1445 sess->back_channel.maxresp_sz = be32_to_cpup(p++);
1446 sess->back_channel.maxresp_cached = be32_to_cpup(p++);
1447 sess->back_channel.maxops = be32_to_cpup(p++);
1448 sess->back_channel.maxreqs = be32_to_cpup(p++);
1449 sess->back_channel.nr_rdma_attrs = be32_to_cpup(p++);
1450 if (sess->back_channel.nr_rdma_attrs == 1) {
1451 READ_BUF(4);
1452 sess->back_channel.rdma_attrs = be32_to_cpup(p++);
1453 } else if (sess->back_channel.nr_rdma_attrs > 1) {
1454 dprintk("Too many back channel attr bitmaps!\n");
1455 goto xdr_error;
1456 }
1457
1458 READ_BUF(4);
1459 sess->callback_prog = be32_to_cpup(p++);
1460 nfsd4_decode_cb_sec(argp, &sess->cb_sec);
1461 DECODE_TAIL;
1462}
1463
1464static __be32
1465nfsd4_decode_destroy_session(struct nfsd4_compoundargs *argp,
1466 struct nfsd4_destroy_session *destroy_session)
1467{
1468 DECODE_HEAD;
1469 READ_BUF(NFS4_MAX_SESSIONID_LEN);
1470 COPYMEM(destroy_session->sessionid.data, NFS4_MAX_SESSIONID_LEN);
1471
1472 DECODE_TAIL;
1473}
1474
1475static __be32
1476nfsd4_decode_free_stateid(struct nfsd4_compoundargs *argp,
1477 struct nfsd4_free_stateid *free_stateid)
1478{
1479 DECODE_HEAD;
1480
1481 READ_BUF(sizeof(stateid_t));
1482 free_stateid->fr_stateid.si_generation = be32_to_cpup(p++);
1483 COPYMEM(&free_stateid->fr_stateid.si_opaque, sizeof(stateid_opaque_t));
1484
1485 DECODE_TAIL;
1486}
1487
1488static __be32
1489nfsd4_decode_sequence(struct nfsd4_compoundargs *argp,
1490 struct nfsd4_sequence *seq)
1491{
1492 DECODE_HEAD;
1493
1494 READ_BUF(NFS4_MAX_SESSIONID_LEN + 16);
1495 COPYMEM(seq->sessionid.data, NFS4_MAX_SESSIONID_LEN);
1496 seq->seqid = be32_to_cpup(p++);
1497 seq->slotid = be32_to_cpup(p++);
1498 seq->maxslots = be32_to_cpup(p++);
1499 seq->cachethis = be32_to_cpup(p++);
1500
1501 DECODE_TAIL;
1502}
1503
1504static __be32
1505nfsd4_decode_test_stateid(struct nfsd4_compoundargs *argp, struct nfsd4_test_stateid *test_stateid)
1506{
1507 int i;
1508 __be32 *p, status;
1509 struct nfsd4_test_stateid_id *stateid;
1510
1511 READ_BUF(4);
1512 test_stateid->ts_num_ids = ntohl(*p++);
1513
1514 INIT_LIST_HEAD(&test_stateid->ts_stateid_list);
1515
1516 for (i = 0; i < test_stateid->ts_num_ids; i++) {
1517 stateid = svcxdr_tmpalloc(argp, sizeof(*stateid));
1518 if (!stateid) {
1519 status = nfserrno(-ENOMEM);
1520 goto out;
1521 }
1522
1523 INIT_LIST_HEAD(&stateid->ts_id_list);
1524 list_add_tail(&stateid->ts_id_list, &test_stateid->ts_stateid_list);
1525
1526 status = nfsd4_decode_stateid(argp, &stateid->ts_id_stateid);
1527 if (status)
1528 goto out;
1529 }
1530
1531 status = 0;
1532out:
1533 return status;
1534xdr_error:
1535 dprintk("NFSD: xdr error (%s:%d)\n", __FILE__, __LINE__);
1536 status = nfserr_bad_xdr;
1537 goto out;
1538}
1539
1540static __be32 nfsd4_decode_destroy_clientid(struct nfsd4_compoundargs *argp, struct nfsd4_destroy_clientid *dc)
1541{
1542 DECODE_HEAD;
1543
1544 READ_BUF(8);
1545 COPYMEM(&dc->clientid, 8);
1546
1547 DECODE_TAIL;
1548}
1549
1550static __be32 nfsd4_decode_reclaim_complete(struct nfsd4_compoundargs *argp, struct nfsd4_reclaim_complete *rc)
1551{
1552 DECODE_HEAD;
1553
1554 READ_BUF(4);
1555 rc->rca_one_fs = be32_to_cpup(p++);
1556
1557 DECODE_TAIL;
1558}
1559
1560#ifdef CONFIG_NFSD_PNFS
1561static __be32
1562nfsd4_decode_getdeviceinfo(struct nfsd4_compoundargs *argp,
1563 struct nfsd4_getdeviceinfo *gdev)
1564{
1565 DECODE_HEAD;
1566 u32 num, i;
1567
1568 READ_BUF(sizeof(struct nfsd4_deviceid) + 3 * 4);
1569 COPYMEM(&gdev->gd_devid, sizeof(struct nfsd4_deviceid));
1570 gdev->gd_layout_type = be32_to_cpup(p++);
1571 gdev->gd_maxcount = be32_to_cpup(p++);
1572 num = be32_to_cpup(p++);
1573 if (num) {
1574 READ_BUF(4 * num);
1575 gdev->gd_notify_types = be32_to_cpup(p++);
1576 for (i = 1; i < num; i++) {
1577 if (be32_to_cpup(p++)) {
1578 status = nfserr_inval;
1579 goto out;
1580 }
1581 }
1582 }
1583 DECODE_TAIL;
1584}
1585
1586static __be32
1587nfsd4_decode_layoutget(struct nfsd4_compoundargs *argp,
1588 struct nfsd4_layoutget *lgp)
1589{
1590 DECODE_HEAD;
1591
1592 READ_BUF(36);
1593 lgp->lg_signal = be32_to_cpup(p++);
1594 lgp->lg_layout_type = be32_to_cpup(p++);
1595 lgp->lg_seg.iomode = be32_to_cpup(p++);
1596 p = xdr_decode_hyper(p, &lgp->lg_seg.offset);
1597 p = xdr_decode_hyper(p, &lgp->lg_seg.length);
1598 p = xdr_decode_hyper(p, &lgp->lg_minlength);
1599
1600 status = nfsd4_decode_stateid(argp, &lgp->lg_sid);
1601 if (status)
1602 return status;
1603
1604 READ_BUF(4);
1605 lgp->lg_maxcount = be32_to_cpup(p++);
1606
1607 DECODE_TAIL;
1608}
1609
1610static __be32
1611nfsd4_decode_layoutcommit(struct nfsd4_compoundargs *argp,
1612 struct nfsd4_layoutcommit *lcp)
1613{
1614 DECODE_HEAD;
1615 u32 timechange;
1616
1617 READ_BUF(20);
1618 p = xdr_decode_hyper(p, &lcp->lc_seg.offset);
1619 p = xdr_decode_hyper(p, &lcp->lc_seg.length);
1620 lcp->lc_reclaim = be32_to_cpup(p++);
1621
1622 status = nfsd4_decode_stateid(argp, &lcp->lc_sid);
1623 if (status)
1624 return status;
1625
1626 READ_BUF(4);
1627 lcp->lc_newoffset = be32_to_cpup(p++);
1628 if (lcp->lc_newoffset) {
1629 READ_BUF(8);
1630 p = xdr_decode_hyper(p, &lcp->lc_last_wr);
1631 } else
1632 lcp->lc_last_wr = 0;
1633 READ_BUF(4);
1634 timechange = be32_to_cpup(p++);
1635 if (timechange) {
1636 status = nfsd4_decode_time(argp, &lcp->lc_mtime);
1637 if (status)
1638 return status;
1639 } else {
1640 lcp->lc_mtime.tv_nsec = UTIME_NOW;
1641 }
1642 READ_BUF(8);
1643 lcp->lc_layout_type = be32_to_cpup(p++);
1644
1645
1646
1647
1648
1649 lcp->lc_up_len = be32_to_cpup(p++);
1650 if (lcp->lc_up_len > 0) {
1651 READ_BUF(lcp->lc_up_len);
1652 READMEM(lcp->lc_up_layout, lcp->lc_up_len);
1653 }
1654
1655 DECODE_TAIL;
1656}
1657
1658static __be32
1659nfsd4_decode_layoutreturn(struct nfsd4_compoundargs *argp,
1660 struct nfsd4_layoutreturn *lrp)
1661{
1662 DECODE_HEAD;
1663
1664 READ_BUF(16);
1665 lrp->lr_reclaim = be32_to_cpup(p++);
1666 lrp->lr_layout_type = be32_to_cpup(p++);
1667 lrp->lr_seg.iomode = be32_to_cpup(p++);
1668 lrp->lr_return_type = be32_to_cpup(p++);
1669 if (lrp->lr_return_type == RETURN_FILE) {
1670 READ_BUF(16);
1671 p = xdr_decode_hyper(p, &lrp->lr_seg.offset);
1672 p = xdr_decode_hyper(p, &lrp->lr_seg.length);
1673
1674 status = nfsd4_decode_stateid(argp, &lrp->lr_sid);
1675 if (status)
1676 return status;
1677
1678 READ_BUF(4);
1679 lrp->lrf_body_len = be32_to_cpup(p++);
1680 if (lrp->lrf_body_len > 0) {
1681 READ_BUF(lrp->lrf_body_len);
1682 READMEM(lrp->lrf_body, lrp->lrf_body_len);
1683 }
1684 } else {
1685 lrp->lr_seg.offset = 0;
1686 lrp->lr_seg.length = NFS4_MAX_UINT64;
1687 }
1688
1689 DECODE_TAIL;
1690}
1691#endif
1692
1693static __be32
1694nfsd4_decode_fallocate(struct nfsd4_compoundargs *argp,
1695 struct nfsd4_fallocate *fallocate)
1696{
1697 DECODE_HEAD;
1698
1699 status = nfsd4_decode_stateid(argp, &fallocate->falloc_stateid);
1700 if (status)
1701 return status;
1702
1703 READ_BUF(16);
1704 p = xdr_decode_hyper(p, &fallocate->falloc_offset);
1705 xdr_decode_hyper(p, &fallocate->falloc_length);
1706
1707 DECODE_TAIL;
1708}
1709
1710static __be32
1711nfsd4_decode_clone(struct nfsd4_compoundargs *argp, struct nfsd4_clone *clone)
1712{
1713 DECODE_HEAD;
1714
1715 status = nfsd4_decode_stateid(argp, &clone->cl_src_stateid);
1716 if (status)
1717 return status;
1718 status = nfsd4_decode_stateid(argp, &clone->cl_dst_stateid);
1719 if (status)
1720 return status;
1721
1722 READ_BUF(8 + 8 + 8);
1723 p = xdr_decode_hyper(p, &clone->cl_src_pos);
1724 p = xdr_decode_hyper(p, &clone->cl_dst_pos);
1725 p = xdr_decode_hyper(p, &clone->cl_count);
1726 DECODE_TAIL;
1727}
1728
1729static __be32
1730nfsd4_decode_copy(struct nfsd4_compoundargs *argp, struct nfsd4_copy *copy)
1731{
1732 DECODE_HEAD;
1733 unsigned int tmp;
1734
1735 status = nfsd4_decode_stateid(argp, ©->cp_src_stateid);
1736 if (status)
1737 return status;
1738 status = nfsd4_decode_stateid(argp, ©->cp_dst_stateid);
1739 if (status)
1740 return status;
1741
1742 READ_BUF(8 + 8 + 8 + 4 + 4 + 4);
1743 p = xdr_decode_hyper(p, ©->cp_src_pos);
1744 p = xdr_decode_hyper(p, ©->cp_dst_pos);
1745 p = xdr_decode_hyper(p, ©->cp_count);
1746 copy->cp_consecutive = be32_to_cpup(p++);
1747 copy->cp_synchronous = be32_to_cpup(p++);
1748 tmp = be32_to_cpup(p);
1749
1750 DECODE_TAIL;
1751}
1752
1753static __be32
1754nfsd4_decode_seek(struct nfsd4_compoundargs *argp, struct nfsd4_seek *seek)
1755{
1756 DECODE_HEAD;
1757
1758 status = nfsd4_decode_stateid(argp, &seek->seek_stateid);
1759 if (status)
1760 return status;
1761
1762 READ_BUF(8 + 4);
1763 p = xdr_decode_hyper(p, &seek->seek_offset);
1764 seek->seek_whence = be32_to_cpup(p);
1765
1766 DECODE_TAIL;
1767}
1768
1769static __be32
1770nfsd4_decode_noop(struct nfsd4_compoundargs *argp, void *p)
1771{
1772 return nfs_ok;
1773}
1774
1775static __be32
1776nfsd4_decode_notsupp(struct nfsd4_compoundargs *argp, void *p)
1777{
1778 return nfserr_notsupp;
1779}
1780
1781typedef __be32(*nfsd4_dec)(struct nfsd4_compoundargs *argp, void *);
1782
1783static nfsd4_dec nfsd4_dec_ops[] = {
1784 [OP_ACCESS] = (nfsd4_dec)nfsd4_decode_access,
1785 [OP_CLOSE] = (nfsd4_dec)nfsd4_decode_close,
1786 [OP_COMMIT] = (nfsd4_dec)nfsd4_decode_commit,
1787 [OP_CREATE] = (nfsd4_dec)nfsd4_decode_create,
1788 [OP_DELEGPURGE] = (nfsd4_dec)nfsd4_decode_notsupp,
1789 [OP_DELEGRETURN] = (nfsd4_dec)nfsd4_decode_delegreturn,
1790 [OP_GETATTR] = (nfsd4_dec)nfsd4_decode_getattr,
1791 [OP_GETFH] = (nfsd4_dec)nfsd4_decode_noop,
1792 [OP_LINK] = (nfsd4_dec)nfsd4_decode_link,
1793 [OP_LOCK] = (nfsd4_dec)nfsd4_decode_lock,
1794 [OP_LOCKT] = (nfsd4_dec)nfsd4_decode_lockt,
1795 [OP_LOCKU] = (nfsd4_dec)nfsd4_decode_locku,
1796 [OP_LOOKUP] = (nfsd4_dec)nfsd4_decode_lookup,
1797 [OP_LOOKUPP] = (nfsd4_dec)nfsd4_decode_noop,
1798 [OP_NVERIFY] = (nfsd4_dec)nfsd4_decode_verify,
1799 [OP_OPEN] = (nfsd4_dec)nfsd4_decode_open,
1800 [OP_OPENATTR] = (nfsd4_dec)nfsd4_decode_notsupp,
1801 [OP_OPEN_CONFIRM] = (nfsd4_dec)nfsd4_decode_open_confirm,
1802 [OP_OPEN_DOWNGRADE] = (nfsd4_dec)nfsd4_decode_open_downgrade,
1803 [OP_PUTFH] = (nfsd4_dec)nfsd4_decode_putfh,
1804 [OP_PUTPUBFH] = (nfsd4_dec)nfsd4_decode_putpubfh,
1805 [OP_PUTROOTFH] = (nfsd4_dec)nfsd4_decode_noop,
1806 [OP_READ] = (nfsd4_dec)nfsd4_decode_read,
1807 [OP_READDIR] = (nfsd4_dec)nfsd4_decode_readdir,
1808 [OP_READLINK] = (nfsd4_dec)nfsd4_decode_noop,
1809 [OP_REMOVE] = (nfsd4_dec)nfsd4_decode_remove,
1810 [OP_RENAME] = (nfsd4_dec)nfsd4_decode_rename,
1811 [OP_RENEW] = (nfsd4_dec)nfsd4_decode_renew,
1812 [OP_RESTOREFH] = (nfsd4_dec)nfsd4_decode_noop,
1813 [OP_SAVEFH] = (nfsd4_dec)nfsd4_decode_noop,
1814 [OP_SECINFO] = (nfsd4_dec)nfsd4_decode_secinfo,
1815 [OP_SETATTR] = (nfsd4_dec)nfsd4_decode_setattr,
1816 [OP_SETCLIENTID] = (nfsd4_dec)nfsd4_decode_setclientid,
1817 [OP_SETCLIENTID_CONFIRM] = (nfsd4_dec)nfsd4_decode_setclientid_confirm,
1818 [OP_VERIFY] = (nfsd4_dec)nfsd4_decode_verify,
1819 [OP_WRITE] = (nfsd4_dec)nfsd4_decode_write,
1820 [OP_RELEASE_LOCKOWNER] = (nfsd4_dec)nfsd4_decode_release_lockowner,
1821
1822
1823 [OP_BACKCHANNEL_CTL] = (nfsd4_dec)nfsd4_decode_backchannel_ctl,
1824 [OP_BIND_CONN_TO_SESSION]= (nfsd4_dec)nfsd4_decode_bind_conn_to_session,
1825 [OP_EXCHANGE_ID] = (nfsd4_dec)nfsd4_decode_exchange_id,
1826 [OP_CREATE_SESSION] = (nfsd4_dec)nfsd4_decode_create_session,
1827 [OP_DESTROY_SESSION] = (nfsd4_dec)nfsd4_decode_destroy_session,
1828 [OP_FREE_STATEID] = (nfsd4_dec)nfsd4_decode_free_stateid,
1829 [OP_GET_DIR_DELEGATION] = (nfsd4_dec)nfsd4_decode_notsupp,
1830#ifdef CONFIG_NFSD_PNFS
1831 [OP_GETDEVICEINFO] = (nfsd4_dec)nfsd4_decode_getdeviceinfo,
1832 [OP_GETDEVICELIST] = (nfsd4_dec)nfsd4_decode_notsupp,
1833 [OP_LAYOUTCOMMIT] = (nfsd4_dec)nfsd4_decode_layoutcommit,
1834 [OP_LAYOUTGET] = (nfsd4_dec)nfsd4_decode_layoutget,
1835 [OP_LAYOUTRETURN] = (nfsd4_dec)nfsd4_decode_layoutreturn,
1836#else
1837 [OP_GETDEVICEINFO] = (nfsd4_dec)nfsd4_decode_notsupp,
1838 [OP_GETDEVICELIST] = (nfsd4_dec)nfsd4_decode_notsupp,
1839 [OP_LAYOUTCOMMIT] = (nfsd4_dec)nfsd4_decode_notsupp,
1840 [OP_LAYOUTGET] = (nfsd4_dec)nfsd4_decode_notsupp,
1841 [OP_LAYOUTRETURN] = (nfsd4_dec)nfsd4_decode_notsupp,
1842#endif
1843 [OP_SECINFO_NO_NAME] = (nfsd4_dec)nfsd4_decode_secinfo_no_name,
1844 [OP_SEQUENCE] = (nfsd4_dec)nfsd4_decode_sequence,
1845 [OP_SET_SSV] = (nfsd4_dec)nfsd4_decode_notsupp,
1846 [OP_TEST_STATEID] = (nfsd4_dec)nfsd4_decode_test_stateid,
1847 [OP_WANT_DELEGATION] = (nfsd4_dec)nfsd4_decode_notsupp,
1848 [OP_DESTROY_CLIENTID] = (nfsd4_dec)nfsd4_decode_destroy_clientid,
1849 [OP_RECLAIM_COMPLETE] = (nfsd4_dec)nfsd4_decode_reclaim_complete,
1850
1851
1852 [OP_ALLOCATE] = (nfsd4_dec)nfsd4_decode_fallocate,
1853 [OP_COPY] = (nfsd4_dec)nfsd4_decode_copy,
1854 [OP_COPY_NOTIFY] = (nfsd4_dec)nfsd4_decode_notsupp,
1855 [OP_DEALLOCATE] = (nfsd4_dec)nfsd4_decode_fallocate,
1856 [OP_IO_ADVISE] = (nfsd4_dec)nfsd4_decode_notsupp,
1857 [OP_LAYOUTERROR] = (nfsd4_dec)nfsd4_decode_notsupp,
1858 [OP_LAYOUTSTATS] = (nfsd4_dec)nfsd4_decode_notsupp,
1859 [OP_OFFLOAD_CANCEL] = (nfsd4_dec)nfsd4_decode_notsupp,
1860 [OP_OFFLOAD_STATUS] = (nfsd4_dec)nfsd4_decode_notsupp,
1861 [OP_READ_PLUS] = (nfsd4_dec)nfsd4_decode_notsupp,
1862 [OP_SEEK] = (nfsd4_dec)nfsd4_decode_seek,
1863 [OP_WRITE_SAME] = (nfsd4_dec)nfsd4_decode_notsupp,
1864 [OP_CLONE] = (nfsd4_dec)nfsd4_decode_clone,
1865};
1866
1867static inline bool
1868nfsd4_opnum_in_range(struct nfsd4_compoundargs *argp, struct nfsd4_op *op)
1869{
1870 if (op->opnum < FIRST_NFS4_OP)
1871 return false;
1872 else if (argp->minorversion == 0 && op->opnum > LAST_NFS40_OP)
1873 return false;
1874 else if (argp->minorversion == 1 && op->opnum > LAST_NFS41_OP)
1875 return false;
1876 else if (argp->minorversion == 2 && op->opnum > LAST_NFS42_OP)
1877 return false;
1878 return true;
1879}
1880
1881static __be32
1882nfsd4_decode_compound(struct nfsd4_compoundargs *argp)
1883{
1884 DECODE_HEAD;
1885 struct nfsd4_op *op;
1886 bool cachethis = false;
1887 int auth_slack= argp->rqstp->rq_auth_slack;
1888 int max_reply = auth_slack + 8;
1889 int readcount = 0;
1890 int readbytes = 0;
1891 int i;
1892
1893 READ_BUF(4);
1894 argp->taglen = be32_to_cpup(p++);
1895 READ_BUF(argp->taglen);
1896 SAVEMEM(argp->tag, argp->taglen);
1897 READ_BUF(8);
1898 argp->minorversion = be32_to_cpup(p++);
1899 argp->opcnt = be32_to_cpup(p++);
1900 max_reply += 4 + (XDR_QUADLEN(argp->taglen) << 2);
1901
1902 if (argp->taglen > NFSD4_MAX_TAGLEN)
1903 goto xdr_error;
1904 if (argp->opcnt > 100)
1905 goto xdr_error;
1906
1907 if (argp->opcnt > ARRAY_SIZE(argp->iops)) {
1908 argp->ops = kzalloc(argp->opcnt * sizeof(*argp->ops), GFP_KERNEL);
1909 if (!argp->ops) {
1910 argp->ops = argp->iops;
1911 dprintk("nfsd: couldn't allocate room for COMPOUND\n");
1912 goto xdr_error;
1913 }
1914 }
1915
1916 if (argp->minorversion > NFSD_SUPPORTED_MINOR_VERSION)
1917 argp->opcnt = 0;
1918
1919 for (i = 0; i < argp->opcnt; i++) {
1920 op = &argp->ops[i];
1921 op->replay = NULL;
1922
1923 READ_BUF(4);
1924 op->opnum = be32_to_cpup(p++);
1925
1926 if (nfsd4_opnum_in_range(argp, op))
1927 op->status = nfsd4_dec_ops[op->opnum](argp, &op->u);
1928 else {
1929 op->opnum = OP_ILLEGAL;
1930 op->status = nfserr_op_illegal;
1931 }
1932
1933
1934
1935
1936 cachethis |= nfsd4_cache_this_op(op);
1937
1938 if (op->opnum == OP_READ) {
1939 readcount++;
1940 readbytes += nfsd4_max_reply(argp->rqstp, op);
1941 } else
1942 max_reply += nfsd4_max_reply(argp->rqstp, op);
1943
1944
1945
1946
1947
1948
1949 if (op->opnum == OP_LOCK || op->opnum == OP_LOCKT)
1950 max_reply += NFS4_OPAQUE_LIMIT;
1951
1952 if (op->status) {
1953 argp->opcnt = i+1;
1954 break;
1955 }
1956 }
1957
1958 if (argp->minorversion)
1959 cachethis = false;
1960 svc_reserve(argp->rqstp, max_reply + readbytes);
1961 argp->rqstp->rq_cachetype = cachethis ? RC_REPLBUFF : RC_NOCACHE;
1962
1963 if (readcount > 1 || max_reply > PAGE_SIZE - auth_slack)
1964 clear_bit(RQ_SPLICE_OK, &argp->rqstp->rq_flags);
1965
1966 DECODE_TAIL;
1967}
1968
1969static __be32 *encode_change(__be32 *p, struct kstat *stat, struct inode *inode,
1970 struct svc_export *exp)
1971{
1972 if (exp->ex_flags & NFSEXP_V4ROOT) {
1973 *p++ = cpu_to_be32(convert_to_wallclock(exp->cd->flush_time));
1974 *p++ = 0;
1975 } else if (IS_I_VERSION(inode)) {
1976 p = xdr_encode_hyper(p, inode->i_version);
1977 } else {
1978 *p++ = cpu_to_be32(stat->ctime.tv_sec);
1979 *p++ = cpu_to_be32(stat->ctime.tv_nsec);
1980 }
1981 return p;
1982}
1983
1984static __be32 *encode_cinfo(__be32 *p, struct nfsd4_change_info *c)
1985{
1986 *p++ = cpu_to_be32(c->atomic);
1987 if (c->change_supported) {
1988 p = xdr_encode_hyper(p, c->before_change);
1989 p = xdr_encode_hyper(p, c->after_change);
1990 } else {
1991 *p++ = cpu_to_be32(c->before_ctime_sec);
1992 *p++ = cpu_to_be32(c->before_ctime_nsec);
1993 *p++ = cpu_to_be32(c->after_ctime_sec);
1994 *p++ = cpu_to_be32(c->after_ctime_nsec);
1995 }
1996 return p;
1997}
1998
1999
2000
2001
2002static __be32 nfsd4_encode_components_esc(struct xdr_stream *xdr, char sep,
2003 char *components, char esc_enter,
2004 char esc_exit)
2005{
2006 __be32 *p;
2007 __be32 pathlen;
2008 int pathlen_offset;
2009 int strlen, count=0;
2010 char *str, *end, *next;
2011
2012 dprintk("nfsd4_encode_components(%s)\n", components);
2013
2014 pathlen_offset = xdr->buf->len;
2015 p = xdr_reserve_space(xdr, 4);
2016 if (!p)
2017 return nfserr_resource;
2018 p++;
2019
2020 end = str = components;
2021 while (*end) {
2022 bool found_esc = false;
2023
2024
2025 if (*str == esc_enter) {
2026 for (; *end && (*end != esc_exit); end++)
2027 ;
2028 next = end + 1;
2029 if (*end && (!*next || *next == sep)) {
2030 str++;
2031 found_esc = true;
2032 }
2033 }
2034
2035 if (!found_esc)
2036 for (; *end && (*end != sep); end++)
2037 ;
2038
2039 strlen = end - str;
2040 if (strlen) {
2041 p = xdr_reserve_space(xdr, strlen + 4);
2042 if (!p)
2043 return nfserr_resource;
2044 p = xdr_encode_opaque(p, str, strlen);
2045 count++;
2046 }
2047 else
2048 end++;
2049 if (found_esc)
2050 end = next;
2051
2052 str = end;
2053 }
2054 pathlen = htonl(count);
2055 write_bytes_to_xdr_buf(xdr->buf, pathlen_offset, &pathlen, 4);
2056 return 0;
2057}
2058
2059
2060
2061
2062static __be32 nfsd4_encode_components(struct xdr_stream *xdr, char sep,
2063 char *components)
2064{
2065 return nfsd4_encode_components_esc(xdr, sep, components, 0, 0);
2066}
2067
2068
2069
2070
2071static __be32 nfsd4_encode_fs_location4(struct xdr_stream *xdr,
2072 struct nfsd4_fs_location *location)
2073{
2074 __be32 status;
2075
2076 status = nfsd4_encode_components_esc(xdr, ':', location->hosts,
2077 '[', ']');
2078 if (status)
2079 return status;
2080 status = nfsd4_encode_components(xdr, '/', location->path);
2081 if (status)
2082 return status;
2083 return 0;
2084}
2085
2086
2087
2088
2089static __be32 nfsd4_encode_path(struct xdr_stream *xdr,
2090 const struct path *root,
2091 const struct path *path)
2092{
2093 struct path cur = *path;
2094 __be32 *p;
2095 struct dentry **components = NULL;
2096 unsigned int ncomponents = 0;
2097 __be32 err = nfserr_jukebox;
2098
2099 dprintk("nfsd4_encode_components(");
2100
2101 path_get(&cur);
2102
2103
2104
2105 for (;;) {
2106 if (path_equal(&cur, root))
2107 break;
2108 if (cur.dentry == cur.mnt->mnt_root) {
2109 if (follow_up(&cur))
2110 continue;
2111 goto out_free;
2112 }
2113 if ((ncomponents & 15) == 0) {
2114 struct dentry **new;
2115 new = krealloc(components,
2116 sizeof(*new) * (ncomponents + 16),
2117 GFP_KERNEL);
2118 if (!new)
2119 goto out_free;
2120 components = new;
2121 }
2122 components[ncomponents++] = cur.dentry;
2123 cur.dentry = dget_parent(cur.dentry);
2124 }
2125 err = nfserr_resource;
2126 p = xdr_reserve_space(xdr, 4);
2127 if (!p)
2128 goto out_free;
2129 *p++ = cpu_to_be32(ncomponents);
2130
2131 while (ncomponents) {
2132 struct dentry *dentry = components[ncomponents - 1];
2133 unsigned int len;
2134
2135 spin_lock(&dentry->d_lock);
2136 len = dentry->d_name.len;
2137 p = xdr_reserve_space(xdr, len + 4);
2138 if (!p) {
2139 spin_unlock(&dentry->d_lock);
2140 goto out_free;
2141 }
2142 p = xdr_encode_opaque(p, dentry->d_name.name, len);
2143 dprintk("/%pd", dentry);
2144 spin_unlock(&dentry->d_lock);
2145 dput(dentry);
2146 ncomponents--;
2147 }
2148
2149 err = 0;
2150out_free:
2151 dprintk(")\n");
2152 while (ncomponents)
2153 dput(components[--ncomponents]);
2154 kfree(components);
2155 path_put(&cur);
2156 return err;
2157}
2158
2159static __be32 nfsd4_encode_fsloc_fsroot(struct xdr_stream *xdr,
2160 struct svc_rqst *rqstp, const struct path *path)
2161{
2162 struct svc_export *exp_ps;
2163 __be32 res;
2164
2165 exp_ps = rqst_find_fsidzero_export(rqstp);
2166 if (IS_ERR(exp_ps))
2167 return nfserrno(PTR_ERR(exp_ps));
2168 res = nfsd4_encode_path(xdr, &exp_ps->ex_path, path);
2169 exp_put(exp_ps);
2170 return res;
2171}
2172
2173
2174
2175
2176static __be32 nfsd4_encode_fs_locations(struct xdr_stream *xdr,
2177 struct svc_rqst *rqstp, struct svc_export *exp)
2178{
2179 __be32 status;
2180 int i;
2181 __be32 *p;
2182 struct nfsd4_fs_locations *fslocs = &exp->ex_fslocs;
2183
2184 status = nfsd4_encode_fsloc_fsroot(xdr, rqstp, &exp->ex_path);
2185 if (status)
2186 return status;
2187 p = xdr_reserve_space(xdr, 4);
2188 if (!p)
2189 return nfserr_resource;
2190 *p++ = cpu_to_be32(fslocs->locations_count);
2191 for (i=0; i<fslocs->locations_count; i++) {
2192 status = nfsd4_encode_fs_location4(xdr, &fslocs->locations[i]);
2193 if (status)
2194 return status;
2195 }
2196 return 0;
2197}
2198
2199static u32 nfs4_file_type(umode_t mode)
2200{
2201 switch (mode & S_IFMT) {
2202 case S_IFIFO: return NF4FIFO;
2203 case S_IFCHR: return NF4CHR;
2204 case S_IFDIR: return NF4DIR;
2205 case S_IFBLK: return NF4BLK;
2206 case S_IFLNK: return NF4LNK;
2207 case S_IFREG: return NF4REG;
2208 case S_IFSOCK: return NF4SOCK;
2209 default: return NF4BAD;
2210 };
2211}
2212
2213static inline __be32
2214nfsd4_encode_aclname(struct xdr_stream *xdr, struct svc_rqst *rqstp,
2215 struct nfs4_ace *ace)
2216{
2217 if (ace->whotype != NFS4_ACL_WHO_NAMED)
2218 return nfs4_acl_write_who(xdr, ace->whotype);
2219 else if (ace->flag & NFS4_ACE_IDENTIFIER_GROUP)
2220 return nfsd4_encode_group(xdr, rqstp, ace->who_gid);
2221 else
2222 return nfsd4_encode_user(xdr, rqstp, ace->who_uid);
2223}
2224
2225static inline __be32
2226nfsd4_encode_layout_types(struct xdr_stream *xdr, u32 layout_types)
2227{
2228 __be32 *p;
2229 unsigned long i = hweight_long(layout_types);
2230
2231 p = xdr_reserve_space(xdr, 4 + 4 * i);
2232 if (!p)
2233 return nfserr_resource;
2234
2235 *p++ = cpu_to_be32(i);
2236
2237 for (i = LAYOUT_NFSV4_1_FILES; i < LAYOUT_TYPE_MAX; ++i)
2238 if (layout_types & (1 << i))
2239 *p++ = cpu_to_be32(i);
2240
2241 return 0;
2242}
2243
2244#define WORD0_ABSENT_FS_ATTRS (FATTR4_WORD0_FS_LOCATIONS | FATTR4_WORD0_FSID | \
2245 FATTR4_WORD0_RDATTR_ERROR)
2246#define WORD1_ABSENT_FS_ATTRS FATTR4_WORD1_MOUNTED_ON_FILEID
2247#define WORD2_ABSENT_FS_ATTRS 0
2248
2249#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
2250static inline __be32
2251nfsd4_encode_security_label(struct xdr_stream *xdr, struct svc_rqst *rqstp,
2252 void *context, int len)
2253{
2254 __be32 *p;
2255
2256 p = xdr_reserve_space(xdr, len + 4 + 4 + 4);
2257 if (!p)
2258 return nfserr_resource;
2259
2260
2261
2262
2263
2264 *p++ = cpu_to_be32(0);
2265 *p++ = cpu_to_be32(0);
2266 p = xdr_encode_opaque(p, context, len);
2267 return 0;
2268}
2269#else
2270static inline __be32
2271nfsd4_encode_security_label(struct xdr_stream *xdr, struct svc_rqst *rqstp,
2272 void *context, int len)
2273{ return 0; }
2274#endif
2275
2276static __be32 fattr_handle_absent_fs(u32 *bmval0, u32 *bmval1, u32 *bmval2, u32 *rdattr_err)
2277{
2278
2279 if (*bmval0 & ~WORD0_ABSENT_FS_ATTRS ||
2280 *bmval1 & ~WORD1_ABSENT_FS_ATTRS) {
2281 if (*bmval0 & FATTR4_WORD0_RDATTR_ERROR ||
2282 *bmval0 & FATTR4_WORD0_FS_LOCATIONS)
2283 *rdattr_err = NFSERR_MOVED;
2284 else
2285 return nfserr_moved;
2286 }
2287 *bmval0 &= WORD0_ABSENT_FS_ATTRS;
2288 *bmval1 &= WORD1_ABSENT_FS_ATTRS;
2289 *bmval2 &= WORD2_ABSENT_FS_ATTRS;
2290 return 0;
2291}
2292
2293
2294static int get_parent_attributes(struct svc_export *exp, struct kstat *stat)
2295{
2296 struct path path = exp->ex_path;
2297 int err;
2298
2299 path_get(&path);
2300 while (follow_up(&path)) {
2301 if (path.dentry != path.mnt->mnt_root)
2302 break;
2303 }
2304 err = vfs_getattr(&path, stat, STATX_BASIC_STATS, AT_STATX_SYNC_AS_STAT);
2305 path_put(&path);
2306 return err;
2307}
2308
2309static __be32
2310nfsd4_encode_bitmap(struct xdr_stream *xdr, u32 bmval0, u32 bmval1, u32 bmval2)
2311{
2312 __be32 *p;
2313
2314 if (bmval2) {
2315 p = xdr_reserve_space(xdr, 16);
2316 if (!p)
2317 goto out_resource;
2318 *p++ = cpu_to_be32(3);
2319 *p++ = cpu_to_be32(bmval0);
2320 *p++ = cpu_to_be32(bmval1);
2321 *p++ = cpu_to_be32(bmval2);
2322 } else if (bmval1) {
2323 p = xdr_reserve_space(xdr, 12);
2324 if (!p)
2325 goto out_resource;
2326 *p++ = cpu_to_be32(2);
2327 *p++ = cpu_to_be32(bmval0);
2328 *p++ = cpu_to_be32(bmval1);
2329 } else {
2330 p = xdr_reserve_space(xdr, 8);
2331 if (!p)
2332 goto out_resource;
2333 *p++ = cpu_to_be32(1);
2334 *p++ = cpu_to_be32(bmval0);
2335 }
2336
2337 return 0;
2338out_resource:
2339 return nfserr_resource;
2340}
2341
2342
2343
2344
2345
2346static __be32
2347nfsd4_encode_fattr(struct xdr_stream *xdr, struct svc_fh *fhp,
2348 struct svc_export *exp,
2349 struct dentry *dentry, u32 *bmval,
2350 struct svc_rqst *rqstp, int ignore_crossmnt)
2351{
2352 u32 bmval0 = bmval[0];
2353 u32 bmval1 = bmval[1];
2354 u32 bmval2 = bmval[2];
2355 struct kstat stat;
2356 struct svc_fh *tempfh = NULL;
2357 struct kstatfs statfs;
2358 __be32 *p;
2359 int starting_len = xdr->buf->len;
2360 int attrlen_offset;
2361 __be32 attrlen;
2362 u32 dummy;
2363 u64 dummy64;
2364 u32 rdattr_err = 0;
2365 __be32 status;
2366 int err;
2367 struct nfs4_acl *acl = NULL;
2368 void *context = NULL;
2369 int contextlen;
2370 bool contextsupport = false;
2371 struct nfsd4_compoundres *resp = rqstp->rq_resp;
2372 u32 minorversion = resp->cstate.minorversion;
2373 struct path path = {
2374 .mnt = exp->ex_path.mnt,
2375 .dentry = dentry,
2376 };
2377 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
2378
2379 BUG_ON(bmval1 & NFSD_WRITEONLY_ATTRS_WORD1);
2380 BUG_ON(!nfsd_attrs_supported(minorversion, bmval));
2381
2382 if (exp->ex_fslocs.migrated) {
2383 status = fattr_handle_absent_fs(&bmval0, &bmval1, &bmval2, &rdattr_err);
2384 if (status)
2385 goto out;
2386 }
2387
2388 err = vfs_getattr(&path, &stat, STATX_BASIC_STATS, AT_STATX_SYNC_AS_STAT);
2389 if (err)
2390 goto out_nfserr;
2391 if ((bmval0 & (FATTR4_WORD0_FILES_AVAIL | FATTR4_WORD0_FILES_FREE |
2392 FATTR4_WORD0_FILES_TOTAL | FATTR4_WORD0_MAXNAME)) ||
2393 (bmval1 & (FATTR4_WORD1_SPACE_AVAIL | FATTR4_WORD1_SPACE_FREE |
2394 FATTR4_WORD1_SPACE_TOTAL))) {
2395 err = vfs_statfs(&path, &statfs);
2396 if (err)
2397 goto out_nfserr;
2398 }
2399 if ((bmval0 & (FATTR4_WORD0_FILEHANDLE | FATTR4_WORD0_FSID)) && !fhp) {
2400 tempfh = kmalloc(sizeof(struct svc_fh), GFP_KERNEL);
2401 status = nfserr_jukebox;
2402 if (!tempfh)
2403 goto out;
2404 fh_init(tempfh, NFS4_FHSIZE);
2405 status = fh_compose(tempfh, exp, dentry, NULL);
2406 if (status)
2407 goto out;
2408 fhp = tempfh;
2409 }
2410 if (bmval0 & FATTR4_WORD0_ACL) {
2411 err = nfsd4_get_nfs4_acl(rqstp, dentry, &acl);
2412 if (err == -EOPNOTSUPP)
2413 bmval0 &= ~FATTR4_WORD0_ACL;
2414 else if (err == -EINVAL) {
2415 status = nfserr_attrnotsupp;
2416 goto out;
2417 } else if (err != 0)
2418 goto out_nfserr;
2419 }
2420
2421#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
2422 if ((bmval2 & FATTR4_WORD2_SECURITY_LABEL) ||
2423 bmval0 & FATTR4_WORD0_SUPPORTED_ATTRS) {
2424 if (exp->ex_flags & NFSEXP_SECURITY_LABEL)
2425 err = security_inode_getsecctx(d_inode(dentry),
2426 &context, &contextlen);
2427 else
2428 err = -EOPNOTSUPP;
2429 contextsupport = (err == 0);
2430 if (bmval2 & FATTR4_WORD2_SECURITY_LABEL) {
2431 if (err == -EOPNOTSUPP)
2432 bmval2 &= ~FATTR4_WORD2_SECURITY_LABEL;
2433 else if (err)
2434 goto out_nfserr;
2435 }
2436 }
2437#endif
2438
2439 status = nfsd4_encode_bitmap(xdr, bmval0, bmval1, bmval2);
2440 if (status)
2441 goto out;
2442
2443 attrlen_offset = xdr->buf->len;
2444 p = xdr_reserve_space(xdr, 4);
2445 if (!p)
2446 goto out_resource;
2447 p++;
2448
2449 if (bmval0 & FATTR4_WORD0_SUPPORTED_ATTRS) {
2450 u32 supp[3];
2451
2452 memcpy(supp, nfsd_suppattrs[minorversion], sizeof(supp));
2453
2454 if (!IS_POSIXACL(dentry->d_inode))
2455 supp[0] &= ~FATTR4_WORD0_ACL;
2456 if (!contextsupport)
2457 supp[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
2458 if (!supp[2]) {
2459 p = xdr_reserve_space(xdr, 12);
2460 if (!p)
2461 goto out_resource;
2462 *p++ = cpu_to_be32(2);
2463 *p++ = cpu_to_be32(supp[0]);
2464 *p++ = cpu_to_be32(supp[1]);
2465 } else {
2466 p = xdr_reserve_space(xdr, 16);
2467 if (!p)
2468 goto out_resource;
2469 *p++ = cpu_to_be32(3);
2470 *p++ = cpu_to_be32(supp[0]);
2471 *p++ = cpu_to_be32(supp[1]);
2472 *p++ = cpu_to_be32(supp[2]);
2473 }
2474 }
2475 if (bmval0 & FATTR4_WORD0_TYPE) {
2476 p = xdr_reserve_space(xdr, 4);
2477 if (!p)
2478 goto out_resource;
2479 dummy = nfs4_file_type(stat.mode);
2480 if (dummy == NF4BAD) {
2481 status = nfserr_serverfault;
2482 goto out;
2483 }
2484 *p++ = cpu_to_be32(dummy);
2485 }
2486 if (bmval0 & FATTR4_WORD0_FH_EXPIRE_TYPE) {
2487 p = xdr_reserve_space(xdr, 4);
2488 if (!p)
2489 goto out_resource;
2490 if (exp->ex_flags & NFSEXP_NOSUBTREECHECK)
2491 *p++ = cpu_to_be32(NFS4_FH_PERSISTENT);
2492 else
2493 *p++ = cpu_to_be32(NFS4_FH_PERSISTENT|
2494 NFS4_FH_VOL_RENAME);
2495 }
2496 if (bmval0 & FATTR4_WORD0_CHANGE) {
2497 p = xdr_reserve_space(xdr, 8);
2498 if (!p)
2499 goto out_resource;
2500 p = encode_change(p, &stat, d_inode(dentry), exp);
2501 }
2502 if (bmval0 & FATTR4_WORD0_SIZE) {
2503 p = xdr_reserve_space(xdr, 8);
2504 if (!p)
2505 goto out_resource;
2506 p = xdr_encode_hyper(p, stat.size);
2507 }
2508 if (bmval0 & FATTR4_WORD0_LINK_SUPPORT) {
2509 p = xdr_reserve_space(xdr, 4);
2510 if (!p)
2511 goto out_resource;
2512 *p++ = cpu_to_be32(1);
2513 }
2514 if (bmval0 & FATTR4_WORD0_SYMLINK_SUPPORT) {
2515 p = xdr_reserve_space(xdr, 4);
2516 if (!p)
2517 goto out_resource;
2518 *p++ = cpu_to_be32(1);
2519 }
2520 if (bmval0 & FATTR4_WORD0_NAMED_ATTR) {
2521 p = xdr_reserve_space(xdr, 4);
2522 if (!p)
2523 goto out_resource;
2524 *p++ = cpu_to_be32(0);
2525 }
2526 if (bmval0 & FATTR4_WORD0_FSID) {
2527 p = xdr_reserve_space(xdr, 16);
2528 if (!p)
2529 goto out_resource;
2530 if (exp->ex_fslocs.migrated) {
2531 p = xdr_encode_hyper(p, NFS4_REFERRAL_FSID_MAJOR);
2532 p = xdr_encode_hyper(p, NFS4_REFERRAL_FSID_MINOR);
2533 } else switch(fsid_source(fhp)) {
2534 case FSIDSOURCE_FSID:
2535 p = xdr_encode_hyper(p, (u64)exp->ex_fsid);
2536 p = xdr_encode_hyper(p, (u64)0);
2537 break;
2538 case FSIDSOURCE_DEV:
2539 *p++ = cpu_to_be32(0);
2540 *p++ = cpu_to_be32(MAJOR(stat.dev));
2541 *p++ = cpu_to_be32(0);
2542 *p++ = cpu_to_be32(MINOR(stat.dev));
2543 break;
2544 case FSIDSOURCE_UUID:
2545 p = xdr_encode_opaque_fixed(p, exp->ex_uuid,
2546 EX_UUID_LEN);
2547 break;
2548 }
2549 }
2550 if (bmval0 & FATTR4_WORD0_UNIQUE_HANDLES) {
2551 p = xdr_reserve_space(xdr, 4);
2552 if (!p)
2553 goto out_resource;
2554 *p++ = cpu_to_be32(0);
2555 }
2556 if (bmval0 & FATTR4_WORD0_LEASE_TIME) {
2557 p = xdr_reserve_space(xdr, 4);
2558 if (!p)
2559 goto out_resource;
2560 *p++ = cpu_to_be32(nn->nfsd4_lease);
2561 }
2562 if (bmval0 & FATTR4_WORD0_RDATTR_ERROR) {
2563 p = xdr_reserve_space(xdr, 4);
2564 if (!p)
2565 goto out_resource;
2566 *p++ = cpu_to_be32(rdattr_err);
2567 }
2568 if (bmval0 & FATTR4_WORD0_ACL) {
2569 struct nfs4_ace *ace;
2570
2571 if (acl == NULL) {
2572 p = xdr_reserve_space(xdr, 4);
2573 if (!p)
2574 goto out_resource;
2575
2576 *p++ = cpu_to_be32(0);
2577 goto out_acl;
2578 }
2579 p = xdr_reserve_space(xdr, 4);
2580 if (!p)
2581 goto out_resource;
2582 *p++ = cpu_to_be32(acl->naces);
2583
2584 for (ace = acl->aces; ace < acl->aces + acl->naces; ace++) {
2585 p = xdr_reserve_space(xdr, 4*3);
2586 if (!p)
2587 goto out_resource;
2588 *p++ = cpu_to_be32(ace->type);
2589 *p++ = cpu_to_be32(ace->flag);
2590 *p++ = cpu_to_be32(ace->access_mask &
2591 NFS4_ACE_MASK_ALL);
2592 status = nfsd4_encode_aclname(xdr, rqstp, ace);
2593 if (status)
2594 goto out;
2595 }
2596 }
2597out_acl:
2598 if (bmval0 & FATTR4_WORD0_ACLSUPPORT) {
2599 p = xdr_reserve_space(xdr, 4);
2600 if (!p)
2601 goto out_resource;
2602 *p++ = cpu_to_be32(IS_POSIXACL(dentry->d_inode) ?
2603 ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL : 0);
2604 }
2605 if (bmval0 & FATTR4_WORD0_CANSETTIME) {
2606 p = xdr_reserve_space(xdr, 4);
2607 if (!p)
2608 goto out_resource;
2609 *p++ = cpu_to_be32(1);
2610 }
2611 if (bmval0 & FATTR4_WORD0_CASE_INSENSITIVE) {
2612 p = xdr_reserve_space(xdr, 4);
2613 if (!p)
2614 goto out_resource;
2615 *p++ = cpu_to_be32(0);
2616 }
2617 if (bmval0 & FATTR4_WORD0_CASE_PRESERVING) {
2618 p = xdr_reserve_space(xdr, 4);
2619 if (!p)
2620 goto out_resource;
2621 *p++ = cpu_to_be32(1);
2622 }
2623 if (bmval0 & FATTR4_WORD0_CHOWN_RESTRICTED) {
2624 p = xdr_reserve_space(xdr, 4);
2625 if (!p)
2626 goto out_resource;
2627 *p++ = cpu_to_be32(1);
2628 }
2629 if (bmval0 & FATTR4_WORD0_FILEHANDLE) {
2630 p = xdr_reserve_space(xdr, fhp->fh_handle.fh_size + 4);
2631 if (!p)
2632 goto out_resource;
2633 p = xdr_encode_opaque(p, &fhp->fh_handle.fh_base,
2634 fhp->fh_handle.fh_size);
2635 }
2636 if (bmval0 & FATTR4_WORD0_FILEID) {
2637 p = xdr_reserve_space(xdr, 8);
2638 if (!p)
2639 goto out_resource;
2640 p = xdr_encode_hyper(p, stat.ino);
2641 }
2642 if (bmval0 & FATTR4_WORD0_FILES_AVAIL) {
2643 p = xdr_reserve_space(xdr, 8);
2644 if (!p)
2645 goto out_resource;
2646 p = xdr_encode_hyper(p, (u64) statfs.f_ffree);
2647 }
2648 if (bmval0 & FATTR4_WORD0_FILES_FREE) {
2649 p = xdr_reserve_space(xdr, 8);
2650 if (!p)
2651 goto out_resource;
2652 p = xdr_encode_hyper(p, (u64) statfs.f_ffree);
2653 }
2654 if (bmval0 & FATTR4_WORD0_FILES_TOTAL) {
2655 p = xdr_reserve_space(xdr, 8);
2656 if (!p)
2657 goto out_resource;
2658 p = xdr_encode_hyper(p, (u64) statfs.f_files);
2659 }
2660 if (bmval0 & FATTR4_WORD0_FS_LOCATIONS) {
2661 status = nfsd4_encode_fs_locations(xdr, rqstp, exp);
2662 if (status)
2663 goto out;
2664 }
2665 if (bmval0 & FATTR4_WORD0_HOMOGENEOUS) {
2666 p = xdr_reserve_space(xdr, 4);
2667 if (!p)
2668 goto out_resource;
2669 *p++ = cpu_to_be32(1);
2670 }
2671 if (bmval0 & FATTR4_WORD0_MAXFILESIZE) {
2672 p = xdr_reserve_space(xdr, 8);
2673 if (!p)
2674 goto out_resource;
2675 p = xdr_encode_hyper(p, exp->ex_path.mnt->mnt_sb->s_maxbytes);
2676 }
2677 if (bmval0 & FATTR4_WORD0_MAXLINK) {
2678 p = xdr_reserve_space(xdr, 4);
2679 if (!p)
2680 goto out_resource;
2681 *p++ = cpu_to_be32(255);
2682 }
2683 if (bmval0 & FATTR4_WORD0_MAXNAME) {
2684 p = xdr_reserve_space(xdr, 4);
2685 if (!p)
2686 goto out_resource;
2687 *p++ = cpu_to_be32(statfs.f_namelen);
2688 }
2689 if (bmval0 & FATTR4_WORD0_MAXREAD) {
2690 p = xdr_reserve_space(xdr, 8);
2691 if (!p)
2692 goto out_resource;
2693 p = xdr_encode_hyper(p, (u64) svc_max_payload(rqstp));
2694 }
2695 if (bmval0 & FATTR4_WORD0_MAXWRITE) {
2696 p = xdr_reserve_space(xdr, 8);
2697 if (!p)
2698 goto out_resource;
2699 p = xdr_encode_hyper(p, (u64) svc_max_payload(rqstp));
2700 }
2701 if (bmval1 & FATTR4_WORD1_MODE) {
2702 p = xdr_reserve_space(xdr, 4);
2703 if (!p)
2704 goto out_resource;
2705 *p++ = cpu_to_be32(stat.mode & S_IALLUGO);
2706 }
2707 if (bmval1 & FATTR4_WORD1_NO_TRUNC) {
2708 p = xdr_reserve_space(xdr, 4);
2709 if (!p)
2710 goto out_resource;
2711 *p++ = cpu_to_be32(1);
2712 }
2713 if (bmval1 & FATTR4_WORD1_NUMLINKS) {
2714 p = xdr_reserve_space(xdr, 4);
2715 if (!p)
2716 goto out_resource;
2717 *p++ = cpu_to_be32(stat.nlink);
2718 }
2719 if (bmval1 & FATTR4_WORD1_OWNER) {
2720 status = nfsd4_encode_user(xdr, rqstp, stat.uid);
2721 if (status)
2722 goto out;
2723 }
2724 if (bmval1 & FATTR4_WORD1_OWNER_GROUP) {
2725 status = nfsd4_encode_group(xdr, rqstp, stat.gid);
2726 if (status)
2727 goto out;
2728 }
2729 if (bmval1 & FATTR4_WORD1_RAWDEV) {
2730 p = xdr_reserve_space(xdr, 8);
2731 if (!p)
2732 goto out_resource;
2733 *p++ = cpu_to_be32((u32) MAJOR(stat.rdev));
2734 *p++ = cpu_to_be32((u32) MINOR(stat.rdev));
2735 }
2736 if (bmval1 & FATTR4_WORD1_SPACE_AVAIL) {
2737 p = xdr_reserve_space(xdr, 8);
2738 if (!p)
2739 goto out_resource;
2740 dummy64 = (u64)statfs.f_bavail * (u64)statfs.f_bsize;
2741 p = xdr_encode_hyper(p, dummy64);
2742 }
2743 if (bmval1 & FATTR4_WORD1_SPACE_FREE) {
2744 p = xdr_reserve_space(xdr, 8);
2745 if (!p)
2746 goto out_resource;
2747 dummy64 = (u64)statfs.f_bfree * (u64)statfs.f_bsize;
2748 p = xdr_encode_hyper(p, dummy64);
2749 }
2750 if (bmval1 & FATTR4_WORD1_SPACE_TOTAL) {
2751 p = xdr_reserve_space(xdr, 8);
2752 if (!p)
2753 goto out_resource;
2754 dummy64 = (u64)statfs.f_blocks * (u64)statfs.f_bsize;
2755 p = xdr_encode_hyper(p, dummy64);
2756 }
2757 if (bmval1 & FATTR4_WORD1_SPACE_USED) {
2758 p = xdr_reserve_space(xdr, 8);
2759 if (!p)
2760 goto out_resource;
2761 dummy64 = (u64)stat.blocks << 9;
2762 p = xdr_encode_hyper(p, dummy64);
2763 }
2764 if (bmval1 & FATTR4_WORD1_TIME_ACCESS) {
2765 p = xdr_reserve_space(xdr, 12);
2766 if (!p)
2767 goto out_resource;
2768 p = xdr_encode_hyper(p, (s64)stat.atime.tv_sec);
2769 *p++ = cpu_to_be32(stat.atime.tv_nsec);
2770 }
2771 if (bmval1 & FATTR4_WORD1_TIME_DELTA) {
2772 p = xdr_reserve_space(xdr, 12);
2773 if (!p)
2774 goto out_resource;
2775 *p++ = cpu_to_be32(0);
2776 *p++ = cpu_to_be32(1);
2777 *p++ = cpu_to_be32(0);
2778 }
2779 if (bmval1 & FATTR4_WORD1_TIME_METADATA) {
2780 p = xdr_reserve_space(xdr, 12);
2781 if (!p)
2782 goto out_resource;
2783 p = xdr_encode_hyper(p, (s64)stat.ctime.tv_sec);
2784 *p++ = cpu_to_be32(stat.ctime.tv_nsec);
2785 }
2786 if (bmval1 & FATTR4_WORD1_TIME_MODIFY) {
2787 p = xdr_reserve_space(xdr, 12);
2788 if (!p)
2789 goto out_resource;
2790 p = xdr_encode_hyper(p, (s64)stat.mtime.tv_sec);
2791 *p++ = cpu_to_be32(stat.mtime.tv_nsec);
2792 }
2793 if (bmval1 & FATTR4_WORD1_MOUNTED_ON_FILEID) {
2794 struct kstat parent_stat;
2795 u64 ino = stat.ino;
2796
2797 p = xdr_reserve_space(xdr, 8);
2798 if (!p)
2799 goto out_resource;
2800
2801
2802
2803
2804 if (ignore_crossmnt == 0 &&
2805 dentry == exp->ex_path.mnt->mnt_root) {
2806 err = get_parent_attributes(exp, &parent_stat);
2807 if (err)
2808 goto out_nfserr;
2809 ino = parent_stat.ino;
2810 }
2811 p = xdr_encode_hyper(p, ino);
2812 }
2813#ifdef CONFIG_NFSD_PNFS
2814 if (bmval1 & FATTR4_WORD1_FS_LAYOUT_TYPES) {
2815 status = nfsd4_encode_layout_types(xdr, exp->ex_layout_types);
2816 if (status)
2817 goto out;
2818 }
2819
2820 if (bmval2 & FATTR4_WORD2_LAYOUT_TYPES) {
2821 status = nfsd4_encode_layout_types(xdr, exp->ex_layout_types);
2822 if (status)
2823 goto out;
2824 }
2825
2826 if (bmval2 & FATTR4_WORD2_LAYOUT_BLKSIZE) {
2827 p = xdr_reserve_space(xdr, 4);
2828 if (!p)
2829 goto out_resource;
2830 *p++ = cpu_to_be32(stat.blksize);
2831 }
2832#endif
2833 if (bmval2 & FATTR4_WORD2_SUPPATTR_EXCLCREAT) {
2834 status = nfsd4_encode_bitmap(xdr, NFSD_SUPPATTR_EXCLCREAT_WORD0,
2835 NFSD_SUPPATTR_EXCLCREAT_WORD1,
2836 NFSD_SUPPATTR_EXCLCREAT_WORD2);
2837 if (status)
2838 goto out;
2839 }
2840
2841 if (bmval2 & FATTR4_WORD2_SECURITY_LABEL) {
2842 status = nfsd4_encode_security_label(xdr, rqstp, context,
2843 contextlen);
2844 if (status)
2845 goto out;
2846 }
2847
2848 attrlen = htonl(xdr->buf->len - attrlen_offset - 4);
2849 write_bytes_to_xdr_buf(xdr->buf, attrlen_offset, &attrlen, 4);
2850 status = nfs_ok;
2851
2852out:
2853#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
2854 if (context)
2855 security_release_secctx(context, contextlen);
2856#endif
2857 kfree(acl);
2858 if (tempfh) {
2859 fh_put(tempfh);
2860 kfree(tempfh);
2861 }
2862 if (status)
2863 xdr_truncate_encode(xdr, starting_len);
2864 return status;
2865out_nfserr:
2866 status = nfserrno(err);
2867 goto out;
2868out_resource:
2869 status = nfserr_resource;
2870 goto out;
2871}
2872
2873static void svcxdr_init_encode_from_buffer(struct xdr_stream *xdr,
2874 struct xdr_buf *buf, __be32 *p, int bytes)
2875{
2876 xdr->scratch.iov_len = 0;
2877 memset(buf, 0, sizeof(struct xdr_buf));
2878 buf->head[0].iov_base = p;
2879 buf->head[0].iov_len = 0;
2880 buf->len = 0;
2881 xdr->buf = buf;
2882 xdr->iov = buf->head;
2883 xdr->p = p;
2884 xdr->end = (void *)p + bytes;
2885 buf->buflen = bytes;
2886}
2887
2888__be32 nfsd4_encode_fattr_to_buf(__be32 **p, int words,
2889 struct svc_fh *fhp, struct svc_export *exp,
2890 struct dentry *dentry, u32 *bmval,
2891 struct svc_rqst *rqstp, int ignore_crossmnt)
2892{
2893 struct xdr_buf dummy;
2894 struct xdr_stream xdr;
2895 __be32 ret;
2896
2897 svcxdr_init_encode_from_buffer(&xdr, &dummy, *p, words << 2);
2898 ret = nfsd4_encode_fattr(&xdr, fhp, exp, dentry, bmval, rqstp,
2899 ignore_crossmnt);
2900 *p = xdr.p;
2901 return ret;
2902}
2903
2904static inline int attributes_need_mount(u32 *bmval)
2905{
2906 if (bmval[0] & ~(FATTR4_WORD0_RDATTR_ERROR | FATTR4_WORD0_LEASE_TIME))
2907 return 1;
2908 if (bmval[1] & ~FATTR4_WORD1_MOUNTED_ON_FILEID)
2909 return 1;
2910 return 0;
2911}
2912
2913static __be32
2914nfsd4_encode_dirent_fattr(struct xdr_stream *xdr, struct nfsd4_readdir *cd,
2915 const char *name, int namlen)
2916{
2917 struct svc_export *exp = cd->rd_fhp->fh_export;
2918 struct dentry *dentry;
2919 __be32 nfserr;
2920 int ignore_crossmnt = 0;
2921
2922 dentry = lookup_one_len_unlocked(name, cd->rd_fhp->fh_dentry, namlen);
2923 if (IS_ERR(dentry))
2924 return nfserrno(PTR_ERR(dentry));
2925 if (d_really_is_negative(dentry)) {
2926
2927
2928
2929
2930
2931 dput(dentry);
2932 return nfserr_noent;
2933 }
2934
2935 exp_get(exp);
2936
2937
2938
2939
2940
2941
2942
2943 if (nfsd_mountpoint(dentry, exp)) {
2944 int err;
2945
2946 if (!(exp->ex_flags & NFSEXP_V4ROOT)
2947 && !attributes_need_mount(cd->rd_bmval)) {
2948 ignore_crossmnt = 1;
2949 goto out_encode;
2950 }
2951
2952
2953
2954
2955
2956 err = nfsd_cross_mnt(cd->rd_rqstp, &dentry, &exp);
2957 if (err) {
2958 nfserr = nfserrno(err);
2959 goto out_put;
2960 }
2961 nfserr = check_nfsd_access(exp, cd->rd_rqstp);
2962 if (nfserr)
2963 goto out_put;
2964
2965 }
2966out_encode:
2967 nfserr = nfsd4_encode_fattr(xdr, NULL, exp, dentry, cd->rd_bmval,
2968 cd->rd_rqstp, ignore_crossmnt);
2969out_put:
2970 dput(dentry);
2971 exp_put(exp);
2972 return nfserr;
2973}
2974
2975static __be32 *
2976nfsd4_encode_rdattr_error(struct xdr_stream *xdr, __be32 nfserr)
2977{
2978 __be32 *p;
2979
2980 p = xdr_reserve_space(xdr, 20);
2981 if (!p)
2982 return NULL;
2983 *p++ = htonl(2);
2984 *p++ = htonl(FATTR4_WORD0_RDATTR_ERROR);
2985 *p++ = htonl(0);
2986
2987 *p++ = htonl(4);
2988 *p++ = nfserr;
2989 return p;
2990}
2991
2992static int
2993nfsd4_encode_dirent(void *ccdv, const char *name, int namlen,
2994 loff_t offset, u64 ino, unsigned int d_type)
2995{
2996 struct readdir_cd *ccd = ccdv;
2997 struct nfsd4_readdir *cd = container_of(ccd, struct nfsd4_readdir, common);
2998 struct xdr_stream *xdr = cd->xdr;
2999 int start_offset = xdr->buf->len;
3000 int cookie_offset;
3001 u32 name_and_cookie;
3002 int entry_bytes;
3003 __be32 nfserr = nfserr_toosmall;
3004 __be64 wire_offset;
3005 __be32 *p;
3006
3007
3008 if (name && isdotent(name, namlen)) {
3009 cd->common.err = nfs_ok;
3010 return 0;
3011 }
3012
3013 if (cd->cookie_offset) {
3014 wire_offset = cpu_to_be64(offset);
3015 write_bytes_to_xdr_buf(xdr->buf, cd->cookie_offset,
3016 &wire_offset, 8);
3017 }
3018
3019 p = xdr_reserve_space(xdr, 4);
3020 if (!p)
3021 goto fail;
3022 *p++ = xdr_one;
3023 cookie_offset = xdr->buf->len;
3024 p = xdr_reserve_space(xdr, 3*4 + namlen);
3025 if (!p)
3026 goto fail;
3027 p = xdr_encode_hyper(p, NFS_OFFSET_MAX);
3028 p = xdr_encode_array(p, name, namlen);
3029
3030 nfserr = nfsd4_encode_dirent_fattr(xdr, cd, name, namlen);
3031 switch (nfserr) {
3032 case nfs_ok:
3033 break;
3034 case nfserr_resource:
3035 nfserr = nfserr_toosmall;
3036 goto fail;
3037 case nfserr_noent:
3038 xdr_truncate_encode(xdr, start_offset);
3039 goto skip_entry;
3040 default:
3041
3042
3043
3044
3045
3046
3047
3048 if (!(cd->rd_bmval[0] & FATTR4_WORD0_RDATTR_ERROR))
3049 goto fail;
3050 p = nfsd4_encode_rdattr_error(xdr, nfserr);
3051 if (p == NULL) {
3052 nfserr = nfserr_toosmall;
3053 goto fail;
3054 }
3055 }
3056 nfserr = nfserr_toosmall;
3057 entry_bytes = xdr->buf->len - start_offset;
3058 if (entry_bytes > cd->rd_maxcount)
3059 goto fail;
3060 cd->rd_maxcount -= entry_bytes;
3061
3062
3063
3064
3065 if (!cd->rd_dircount)
3066 goto fail;
3067 name_and_cookie = 4 + 4 * XDR_QUADLEN(namlen) + 8;
3068 if (name_and_cookie > cd->rd_dircount && cd->cookie_offset)
3069 goto fail;
3070 cd->rd_dircount -= min(cd->rd_dircount, name_and_cookie);
3071
3072 cd->cookie_offset = cookie_offset;
3073skip_entry:
3074 cd->common.err = nfs_ok;
3075 return 0;
3076fail:
3077 xdr_truncate_encode(xdr, start_offset);
3078 cd->common.err = nfserr;
3079 return -EINVAL;
3080}
3081
3082static __be32
3083nfsd4_encode_stateid(struct xdr_stream *xdr, stateid_t *sid)
3084{
3085 __be32 *p;
3086
3087 p = xdr_reserve_space(xdr, sizeof(stateid_t));
3088 if (!p)
3089 return nfserr_resource;
3090 *p++ = cpu_to_be32(sid->si_generation);
3091 p = xdr_encode_opaque_fixed(p, &sid->si_opaque,
3092 sizeof(stateid_opaque_t));
3093 return 0;
3094}
3095
3096static __be32
3097nfsd4_encode_access(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_access *access)
3098{
3099 struct xdr_stream *xdr = &resp->xdr;
3100 __be32 *p;
3101
3102 if (!nfserr) {
3103 p = xdr_reserve_space(xdr, 8);
3104 if (!p)
3105 return nfserr_resource;
3106 *p++ = cpu_to_be32(access->ac_supported);
3107 *p++ = cpu_to_be32(access->ac_resp_access);
3108 }
3109 return nfserr;
3110}
3111
3112static __be32 nfsd4_encode_bind_conn_to_session(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_bind_conn_to_session *bcts)
3113{
3114 struct xdr_stream *xdr = &resp->xdr;
3115 __be32 *p;
3116
3117 if (!nfserr) {
3118 p = xdr_reserve_space(xdr, NFS4_MAX_SESSIONID_LEN + 8);
3119 if (!p)
3120 return nfserr_resource;
3121 p = xdr_encode_opaque_fixed(p, bcts->sessionid.data,
3122 NFS4_MAX_SESSIONID_LEN);
3123 *p++ = cpu_to_be32(bcts->dir);
3124
3125 *p++ = cpu_to_be32(0);
3126 }
3127 return nfserr;
3128}
3129
3130static __be32
3131nfsd4_encode_close(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_close *close)
3132{
3133 struct xdr_stream *xdr = &resp->xdr;
3134
3135 if (!nfserr)
3136 nfserr = nfsd4_encode_stateid(xdr, &close->cl_stateid);
3137
3138 return nfserr;
3139}
3140
3141
3142static __be32
3143nfsd4_encode_commit(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_commit *commit)
3144{
3145 struct xdr_stream *xdr = &resp->xdr;
3146 __be32 *p;
3147
3148 if (!nfserr) {
3149 p = xdr_reserve_space(xdr, NFS4_VERIFIER_SIZE);
3150 if (!p)
3151 return nfserr_resource;
3152 p = xdr_encode_opaque_fixed(p, commit->co_verf.data,
3153 NFS4_VERIFIER_SIZE);
3154 }
3155 return nfserr;
3156}
3157
3158static __be32
3159nfsd4_encode_create(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_create *create)
3160{
3161 struct xdr_stream *xdr = &resp->xdr;
3162 __be32 *p;
3163
3164 if (!nfserr) {
3165 p = xdr_reserve_space(xdr, 20);
3166 if (!p)
3167 return nfserr_resource;
3168 encode_cinfo(p, &create->cr_cinfo);
3169 nfserr = nfsd4_encode_bitmap(xdr, create->cr_bmval[0],
3170 create->cr_bmval[1], create->cr_bmval[2]);
3171 }
3172 return nfserr;
3173}
3174
3175static __be32
3176nfsd4_encode_getattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_getattr *getattr)
3177{
3178 struct svc_fh *fhp = getattr->ga_fhp;
3179 struct xdr_stream *xdr = &resp->xdr;
3180
3181 if (nfserr)
3182 return nfserr;
3183
3184 nfserr = nfsd4_encode_fattr(xdr, fhp, fhp->fh_export, fhp->fh_dentry,
3185 getattr->ga_bmval,
3186 resp->rqstp, 0);
3187 return nfserr;
3188}
3189
3190static __be32
3191nfsd4_encode_getfh(struct nfsd4_compoundres *resp, __be32 nfserr, struct svc_fh **fhpp)
3192{
3193 struct xdr_stream *xdr = &resp->xdr;
3194 struct svc_fh *fhp = *fhpp;
3195 unsigned int len;
3196 __be32 *p;
3197
3198 if (!nfserr) {
3199 len = fhp->fh_handle.fh_size;
3200 p = xdr_reserve_space(xdr, len + 4);
3201 if (!p)
3202 return nfserr_resource;
3203 p = xdr_encode_opaque(p, &fhp->fh_handle.fh_base, len);
3204 }
3205 return nfserr;
3206}
3207
3208
3209
3210
3211
3212static __be32
3213nfsd4_encode_lock_denied(struct xdr_stream *xdr, struct nfsd4_lock_denied *ld)
3214{
3215 struct xdr_netobj *conf = &ld->ld_owner;
3216 __be32 *p;
3217
3218again:
3219 p = xdr_reserve_space(xdr, 32 + XDR_LEN(conf->len));
3220 if (!p) {
3221
3222
3223
3224
3225 if (conf->len) {
3226 kfree(conf->data);
3227 conf->len = 0;
3228 conf->data = NULL;
3229 goto again;
3230 }
3231 return nfserr_resource;
3232 }
3233 p = xdr_encode_hyper(p, ld->ld_start);
3234 p = xdr_encode_hyper(p, ld->ld_length);
3235 *p++ = cpu_to_be32(ld->ld_type);
3236 if (conf->len) {
3237 p = xdr_encode_opaque_fixed(p, &ld->ld_clientid, 8);
3238 p = xdr_encode_opaque(p, conf->data, conf->len);
3239 kfree(conf->data);
3240 } else {
3241 p = xdr_encode_hyper(p, (u64)0);
3242 *p++ = cpu_to_be32(0);
3243 }
3244 return nfserr_denied;
3245}
3246
3247static __be32
3248nfsd4_encode_lock(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lock *lock)
3249{
3250 struct xdr_stream *xdr = &resp->xdr;
3251
3252 if (!nfserr)
3253 nfserr = nfsd4_encode_stateid(xdr, &lock->lk_resp_stateid);
3254 else if (nfserr == nfserr_denied)
3255 nfserr = nfsd4_encode_lock_denied(xdr, &lock->lk_denied);
3256
3257 return nfserr;
3258}
3259
3260static __be32
3261nfsd4_encode_lockt(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lockt *lockt)
3262{
3263 struct xdr_stream *xdr = &resp->xdr;
3264
3265 if (nfserr == nfserr_denied)
3266 nfsd4_encode_lock_denied(xdr, &lockt->lt_denied);
3267 return nfserr;
3268}
3269
3270static __be32
3271nfsd4_encode_locku(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_locku *locku)
3272{
3273 struct xdr_stream *xdr = &resp->xdr;
3274
3275 if (!nfserr)
3276 nfserr = nfsd4_encode_stateid(xdr, &locku->lu_stateid);
3277
3278 return nfserr;
3279}
3280
3281
3282static __be32
3283nfsd4_encode_link(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_link *link)
3284{
3285 struct xdr_stream *xdr = &resp->xdr;
3286 __be32 *p;
3287
3288 if (!nfserr) {
3289 p = xdr_reserve_space(xdr, 20);
3290 if (!p)
3291 return nfserr_resource;
3292 p = encode_cinfo(p, &link->li_cinfo);
3293 }
3294 return nfserr;
3295}
3296
3297
3298static __be32
3299nfsd4_encode_open(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open *open)
3300{
3301 struct xdr_stream *xdr = &resp->xdr;
3302 __be32 *p;
3303
3304 if (nfserr)
3305 goto out;
3306
3307 nfserr = nfsd4_encode_stateid(xdr, &open->op_stateid);
3308 if (nfserr)
3309 goto out;
3310 p = xdr_reserve_space(xdr, 24);
3311 if (!p)
3312 return nfserr_resource;
3313 p = encode_cinfo(p, &open->op_cinfo);
3314 *p++ = cpu_to_be32(open->op_rflags);
3315
3316 nfserr = nfsd4_encode_bitmap(xdr, open->op_bmval[0], open->op_bmval[1],
3317 open->op_bmval[2]);
3318 if (nfserr)
3319 goto out;
3320
3321 p = xdr_reserve_space(xdr, 4);
3322 if (!p)
3323 return nfserr_resource;
3324
3325 *p++ = cpu_to_be32(open->op_delegate_type);
3326 switch (open->op_delegate_type) {
3327 case NFS4_OPEN_DELEGATE_NONE:
3328 break;
3329 case NFS4_OPEN_DELEGATE_READ:
3330 nfserr = nfsd4_encode_stateid(xdr, &open->op_delegate_stateid);
3331 if (nfserr)
3332 return nfserr;
3333 p = xdr_reserve_space(xdr, 20);
3334 if (!p)
3335 return nfserr_resource;
3336 *p++ = cpu_to_be32(open->op_recall);
3337
3338
3339
3340
3341 *p++ = cpu_to_be32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
3342 *p++ = cpu_to_be32(0);
3343 *p++ = cpu_to_be32(0);
3344 *p++ = cpu_to_be32(0);
3345 break;
3346 case NFS4_OPEN_DELEGATE_WRITE:
3347 nfserr = nfsd4_encode_stateid(xdr, &open->op_delegate_stateid);
3348 if (nfserr)
3349 return nfserr;
3350 p = xdr_reserve_space(xdr, 32);
3351 if (!p)
3352 return nfserr_resource;
3353 *p++ = cpu_to_be32(0);
3354
3355
3356
3357
3358 *p++ = cpu_to_be32(NFS4_LIMIT_SIZE);
3359 *p++ = cpu_to_be32(~(u32)0);
3360 *p++ = cpu_to_be32(~(u32)0);
3361
3362
3363
3364
3365 *p++ = cpu_to_be32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
3366 *p++ = cpu_to_be32(0);
3367 *p++ = cpu_to_be32(0);
3368 *p++ = cpu_to_be32(0);
3369 break;
3370 case NFS4_OPEN_DELEGATE_NONE_EXT:
3371 switch (open->op_why_no_deleg) {
3372 case WND4_CONTENTION:
3373 case WND4_RESOURCE:
3374 p = xdr_reserve_space(xdr, 8);
3375 if (!p)
3376 return nfserr_resource;
3377 *p++ = cpu_to_be32(open->op_why_no_deleg);
3378
3379 *p++ = cpu_to_be32(0);
3380 break;
3381 default:
3382 p = xdr_reserve_space(xdr, 4);
3383 if (!p)
3384 return nfserr_resource;
3385 *p++ = cpu_to_be32(open->op_why_no_deleg);
3386 }
3387 break;
3388 default:
3389 BUG();
3390 }
3391
3392out:
3393 return nfserr;
3394}
3395
3396static __be32
3397nfsd4_encode_open_confirm(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_confirm *oc)
3398{
3399 struct xdr_stream *xdr = &resp->xdr;
3400
3401 if (!nfserr)
3402 nfserr = nfsd4_encode_stateid(xdr, &oc->oc_resp_stateid);
3403
3404 return nfserr;
3405}
3406
3407static __be32
3408nfsd4_encode_open_downgrade(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_downgrade *od)
3409{
3410 struct xdr_stream *xdr = &resp->xdr;
3411
3412 if (!nfserr)
3413 nfserr = nfsd4_encode_stateid(xdr, &od->od_stateid);
3414
3415 return nfserr;
3416}
3417
3418static __be32 nfsd4_encode_splice_read(
3419 struct nfsd4_compoundres *resp,
3420 struct nfsd4_read *read,
3421 struct file *file, unsigned long maxcount)
3422{
3423 struct xdr_stream *xdr = &resp->xdr;
3424 struct xdr_buf *buf = xdr->buf;
3425 u32 eof;
3426 long len;
3427 int space_left;
3428 __be32 nfserr;
3429 __be32 *p = xdr->p - 2;
3430
3431
3432 if (xdr->end - xdr->p < 1)
3433 return nfserr_resource;
3434
3435 len = maxcount;
3436 nfserr = nfsd_splice_read(read->rd_rqstp, file,
3437 read->rd_offset, &maxcount);
3438 if (nfserr) {
3439
3440
3441
3442
3443
3444 buf->page_len = 0;
3445 return nfserr;
3446 }
3447
3448 eof = nfsd_eof_on_read(len, maxcount, read->rd_offset,
3449 d_inode(read->rd_fhp->fh_dentry)->i_size);
3450
3451 *(p++) = htonl(eof);
3452 *(p++) = htonl(maxcount);
3453
3454 buf->page_len = maxcount;
3455 buf->len += maxcount;
3456 xdr->page_ptr += (buf->page_base + maxcount + PAGE_SIZE - 1)
3457 / PAGE_SIZE;
3458
3459
3460 buf->tail[0].iov_base = xdr->p;
3461 buf->tail[0].iov_len = 0;
3462 xdr->iov = buf->tail;
3463 if (maxcount&3) {
3464 int pad = 4 - (maxcount&3);
3465
3466 *(xdr->p++) = 0;
3467
3468 buf->tail[0].iov_base += maxcount&3;
3469 buf->tail[0].iov_len = pad;
3470 buf->len += pad;
3471 }
3472
3473 space_left = min_t(int, (void *)xdr->end - (void *)xdr->p,
3474 buf->buflen - buf->len);
3475 buf->buflen = buf->len + space_left;
3476 xdr->end = (__be32 *)((void *)xdr->end + space_left);
3477
3478 return 0;
3479}
3480
3481static __be32 nfsd4_encode_readv(struct nfsd4_compoundres *resp,
3482 struct nfsd4_read *read,
3483 struct file *file, unsigned long maxcount)
3484{
3485 struct xdr_stream *xdr = &resp->xdr;
3486 u32 eof;
3487 int v;
3488 int starting_len = xdr->buf->len - 8;
3489 long len;
3490 int thislen;
3491 __be32 nfserr;
3492 __be32 tmp;
3493 __be32 *p;
3494 u32 zzz = 0;
3495 int pad;
3496
3497 len = maxcount;
3498 v = 0;
3499
3500 thislen = min_t(long, len, ((void *)xdr->end - (void *)xdr->p));
3501 p = xdr_reserve_space(xdr, (thislen+3)&~3);
3502 WARN_ON_ONCE(!p);
3503 resp->rqstp->rq_vec[v].iov_base = p;
3504 resp->rqstp->rq_vec[v].iov_len = thislen;
3505 v++;
3506 len -= thislen;
3507
3508 while (len) {
3509 thislen = min_t(long, len, PAGE_SIZE);
3510 p = xdr_reserve_space(xdr, (thislen+3)&~3);
3511 WARN_ON_ONCE(!p);
3512 resp->rqstp->rq_vec[v].iov_base = p;
3513 resp->rqstp->rq_vec[v].iov_len = thislen;
3514 v++;
3515 len -= thislen;
3516 }
3517 read->rd_vlen = v;
3518
3519 len = maxcount;
3520 nfserr = nfsd_readv(file, read->rd_offset, resp->rqstp->rq_vec,
3521 read->rd_vlen, &maxcount);
3522 if (nfserr)
3523 return nfserr;
3524 xdr_truncate_encode(xdr, starting_len + 8 + ((maxcount+3)&~3));
3525
3526 eof = nfsd_eof_on_read(len, maxcount, read->rd_offset,
3527 d_inode(read->rd_fhp->fh_dentry)->i_size);
3528
3529 tmp = htonl(eof);
3530 write_bytes_to_xdr_buf(xdr->buf, starting_len , &tmp, 4);
3531 tmp = htonl(maxcount);
3532 write_bytes_to_xdr_buf(xdr->buf, starting_len + 4, &tmp, 4);
3533
3534 pad = (maxcount&3) ? 4 - (maxcount&3) : 0;
3535 write_bytes_to_xdr_buf(xdr->buf, starting_len + 8 + maxcount,
3536 &zzz, pad);
3537 return 0;
3538
3539}
3540
3541static __be32
3542nfsd4_encode_read(struct nfsd4_compoundres *resp, __be32 nfserr,
3543 struct nfsd4_read *read)
3544{
3545 unsigned long maxcount;
3546 struct xdr_stream *xdr = &resp->xdr;
3547 struct file *file = read->rd_filp;
3548 int starting_len = xdr->buf->len;
3549 struct raparms *ra = NULL;
3550 __be32 *p;
3551
3552 if (nfserr)
3553 goto out;
3554
3555 p = xdr_reserve_space(xdr, 8);
3556 if (!p) {
3557 WARN_ON_ONCE(test_bit(RQ_SPLICE_OK, &resp->rqstp->rq_flags));
3558 nfserr = nfserr_resource;
3559 goto out;
3560 }
3561 if (resp->xdr.buf->page_len &&
3562 test_bit(RQ_SPLICE_OK, &resp->rqstp->rq_flags)) {
3563 WARN_ON_ONCE(1);
3564 nfserr = nfserr_resource;
3565 goto out;
3566 }
3567 xdr_commit_encode(xdr);
3568
3569 maxcount = svc_max_payload(resp->rqstp);
3570 maxcount = min_t(unsigned long, maxcount,
3571 (xdr->buf->buflen - xdr->buf->len));
3572 maxcount = min_t(unsigned long, maxcount, read->rd_length);
3573
3574 if (read->rd_tmp_file)
3575 ra = nfsd_init_raparms(file);
3576
3577 if (file->f_op->splice_read &&
3578 test_bit(RQ_SPLICE_OK, &resp->rqstp->rq_flags))
3579 nfserr = nfsd4_encode_splice_read(resp, read, file, maxcount);
3580 else
3581 nfserr = nfsd4_encode_readv(resp, read, file, maxcount);
3582
3583 if (ra)
3584 nfsd_put_raparams(file, ra);
3585
3586 if (nfserr)
3587 xdr_truncate_encode(xdr, starting_len);
3588
3589out:
3590 if (file)
3591 fput(file);
3592 return nfserr;
3593}
3594
3595static __be32
3596nfsd4_encode_readlink(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readlink *readlink)
3597{
3598 int maxcount;
3599 __be32 wire_count;
3600 int zero = 0;
3601 struct xdr_stream *xdr = &resp->xdr;
3602 int length_offset = xdr->buf->len;
3603 __be32 *p;
3604
3605 if (nfserr)
3606 return nfserr;
3607
3608 p = xdr_reserve_space(xdr, 4);
3609 if (!p)
3610 return nfserr_resource;
3611 maxcount = PAGE_SIZE;
3612
3613 p = xdr_reserve_space(xdr, maxcount);
3614 if (!p)
3615 return nfserr_resource;
3616
3617
3618
3619
3620
3621
3622 nfserr = nfsd_readlink(readlink->rl_rqstp, readlink->rl_fhp,
3623 (char *)p, &maxcount);
3624 if (nfserr == nfserr_isdir)
3625 nfserr = nfserr_inval;
3626 if (nfserr) {
3627 xdr_truncate_encode(xdr, length_offset);
3628 return nfserr;
3629 }
3630
3631 wire_count = htonl(maxcount);
3632 write_bytes_to_xdr_buf(xdr->buf, length_offset, &wire_count, 4);
3633 xdr_truncate_encode(xdr, length_offset + 4 + ALIGN(maxcount, 4));
3634 if (maxcount & 3)
3635 write_bytes_to_xdr_buf(xdr->buf, length_offset + 4 + maxcount,
3636 &zero, 4 - (maxcount&3));
3637 return 0;
3638}
3639
3640static __be32
3641nfsd4_encode_readdir(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readdir *readdir)
3642{
3643 int maxcount;
3644 int bytes_left;
3645 loff_t offset;
3646 __be64 wire_offset;
3647 struct xdr_stream *xdr = &resp->xdr;
3648 int starting_len = xdr->buf->len;
3649 __be32 *p;
3650
3651 if (nfserr)
3652 return nfserr;
3653
3654 p = xdr_reserve_space(xdr, NFS4_VERIFIER_SIZE);
3655 if (!p)
3656 return nfserr_resource;
3657
3658
3659 *p++ = cpu_to_be32(0);
3660 *p++ = cpu_to_be32(0);
3661 resp->xdr.buf->head[0].iov_len = ((char *)resp->xdr.p)
3662 - (char *)resp->xdr.buf->head[0].iov_base;
3663
3664
3665
3666
3667
3668 bytes_left = xdr->buf->buflen - xdr->buf->len
3669 - COMPOUND_ERR_SLACK_SPACE - 8;
3670 if (bytes_left < 0) {
3671 nfserr = nfserr_resource;
3672 goto err_no_verf;
3673 }
3674 maxcount = min_t(u32, readdir->rd_maxcount, INT_MAX);
3675
3676
3677
3678
3679
3680 if (maxcount < 16) {
3681 nfserr = nfserr_toosmall;
3682 goto err_no_verf;
3683 }
3684 maxcount = min_t(int, maxcount-16, bytes_left);
3685
3686
3687 if (!readdir->rd_dircount)
3688 readdir->rd_dircount = INT_MAX;
3689
3690 readdir->xdr = xdr;
3691 readdir->rd_maxcount = maxcount;
3692 readdir->common.err = 0;
3693 readdir->cookie_offset = 0;
3694
3695 offset = readdir->rd_cookie;
3696 nfserr = nfsd_readdir(readdir->rd_rqstp, readdir->rd_fhp,
3697 &offset,
3698 &readdir->common, nfsd4_encode_dirent);
3699 if (nfserr == nfs_ok &&
3700 readdir->common.err == nfserr_toosmall &&
3701 xdr->buf->len == starting_len + 8) {
3702
3703 if (maxcount - 16 < bytes_left)
3704
3705 nfserr = nfserr_toosmall;
3706 else
3707
3708 nfserr = nfserr_resource;
3709 }
3710 if (nfserr)
3711 goto err_no_verf;
3712
3713 if (readdir->cookie_offset) {
3714 wire_offset = cpu_to_be64(offset);
3715 write_bytes_to_xdr_buf(xdr->buf, readdir->cookie_offset,
3716 &wire_offset, 8);
3717 }
3718
3719 p = xdr_reserve_space(xdr, 8);
3720 if (!p) {
3721 WARN_ON_ONCE(1);
3722 goto err_no_verf;
3723 }
3724 *p++ = 0;
3725 *p++ = htonl(readdir->common.err == nfserr_eof);
3726
3727 return 0;
3728err_no_verf:
3729 xdr_truncate_encode(xdr, starting_len);
3730 return nfserr;
3731}
3732
3733static __be32
3734nfsd4_encode_remove(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_remove *remove)
3735{
3736 struct xdr_stream *xdr = &resp->xdr;
3737 __be32 *p;
3738
3739 if (!nfserr) {
3740 p = xdr_reserve_space(xdr, 20);
3741 if (!p)
3742 return nfserr_resource;
3743 p = encode_cinfo(p, &remove->rm_cinfo);
3744 }
3745 return nfserr;
3746}
3747
3748static __be32
3749nfsd4_encode_rename(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_rename *rename)
3750{
3751 struct xdr_stream *xdr = &resp->xdr;
3752 __be32 *p;
3753
3754 if (!nfserr) {
3755 p = xdr_reserve_space(xdr, 40);
3756 if (!p)
3757 return nfserr_resource;
3758 p = encode_cinfo(p, &rename->rn_sinfo);
3759 p = encode_cinfo(p, &rename->rn_tinfo);
3760 }
3761 return nfserr;
3762}
3763
3764static __be32
3765nfsd4_do_encode_secinfo(struct xdr_stream *xdr,
3766 __be32 nfserr, struct svc_export *exp)
3767{
3768 u32 i, nflavs, supported;
3769 struct exp_flavor_info *flavs;
3770 struct exp_flavor_info def_flavs[2];
3771 __be32 *p, *flavorsp;
3772 static bool report = true;
3773
3774 if (nfserr)
3775 goto out;
3776 nfserr = nfserr_resource;
3777 if (exp->ex_nflavors) {
3778 flavs = exp->ex_flavors;
3779 nflavs = exp->ex_nflavors;
3780 } else {
3781 flavs = def_flavs;
3782 if (exp->ex_client->flavour->flavour == RPC_AUTH_UNIX) {
3783 nflavs = 2;
3784 flavs[0].pseudoflavor = RPC_AUTH_UNIX;
3785 flavs[1].pseudoflavor = RPC_AUTH_NULL;
3786 } else if (exp->ex_client->flavour->flavour == RPC_AUTH_GSS) {
3787 nflavs = 1;
3788 flavs[0].pseudoflavor
3789 = svcauth_gss_flavor(exp->ex_client);
3790 } else {
3791 nflavs = 1;
3792 flavs[0].pseudoflavor
3793 = exp->ex_client->flavour->flavour;
3794 }
3795 }
3796
3797 supported = 0;
3798 p = xdr_reserve_space(xdr, 4);
3799 if (!p)
3800 goto out;
3801 flavorsp = p++;
3802
3803 for (i = 0; i < nflavs; i++) {
3804 rpc_authflavor_t pf = flavs[i].pseudoflavor;
3805 struct rpcsec_gss_info info;
3806
3807 if (rpcauth_get_gssinfo(pf, &info) == 0) {
3808 supported++;
3809 p = xdr_reserve_space(xdr, 4 + 4 +
3810 XDR_LEN(info.oid.len) + 4 + 4);
3811 if (!p)
3812 goto out;
3813 *p++ = cpu_to_be32(RPC_AUTH_GSS);
3814 p = xdr_encode_opaque(p, info.oid.data, info.oid.len);
3815 *p++ = cpu_to_be32(info.qop);
3816 *p++ = cpu_to_be32(info.service);
3817 } else if (pf < RPC_AUTH_MAXFLAVOR) {
3818 supported++;
3819 p = xdr_reserve_space(xdr, 4);
3820 if (!p)
3821 goto out;
3822 *p++ = cpu_to_be32(pf);
3823 } else {
3824 if (report)
3825 pr_warn("NFS: SECINFO: security flavor %u "
3826 "is not supported\n", pf);
3827 }
3828 }
3829
3830 if (nflavs != supported)
3831 report = false;
3832 *flavorsp = htonl(supported);
3833 nfserr = 0;
3834out:
3835 if (exp)
3836 exp_put(exp);
3837 return nfserr;
3838}
3839
3840static __be32
3841nfsd4_encode_secinfo(struct nfsd4_compoundres *resp, __be32 nfserr,
3842 struct nfsd4_secinfo *secinfo)
3843{
3844 struct xdr_stream *xdr = &resp->xdr;
3845
3846 return nfsd4_do_encode_secinfo(xdr, nfserr, secinfo->si_exp);
3847}
3848
3849static __be32
3850nfsd4_encode_secinfo_no_name(struct nfsd4_compoundres *resp, __be32 nfserr,
3851 struct nfsd4_secinfo_no_name *secinfo)
3852{
3853 struct xdr_stream *xdr = &resp->xdr;
3854
3855 return nfsd4_do_encode_secinfo(xdr, nfserr, secinfo->sin_exp);
3856}
3857
3858
3859
3860
3861
3862static __be32
3863nfsd4_encode_setattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setattr *setattr)
3864{
3865 struct xdr_stream *xdr = &resp->xdr;
3866 __be32 *p;
3867
3868 p = xdr_reserve_space(xdr, 16);
3869 if (!p)
3870 return nfserr_resource;
3871 if (nfserr) {
3872 *p++ = cpu_to_be32(3);
3873 *p++ = cpu_to_be32(0);
3874 *p++ = cpu_to_be32(0);
3875 *p++ = cpu_to_be32(0);
3876 }
3877 else {
3878 *p++ = cpu_to_be32(3);
3879 *p++ = cpu_to_be32(setattr->sa_bmval[0]);
3880 *p++ = cpu_to_be32(setattr->sa_bmval[1]);
3881 *p++ = cpu_to_be32(setattr->sa_bmval[2]);
3882 }
3883 return nfserr;
3884}
3885
3886static __be32
3887nfsd4_encode_setclientid(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setclientid *scd)
3888{
3889 struct xdr_stream *xdr = &resp->xdr;
3890 __be32 *p;
3891
3892 if (!nfserr) {
3893 p = xdr_reserve_space(xdr, 8 + NFS4_VERIFIER_SIZE);
3894 if (!p)
3895 return nfserr_resource;
3896 p = xdr_encode_opaque_fixed(p, &scd->se_clientid, 8);
3897 p = xdr_encode_opaque_fixed(p, &scd->se_confirm,
3898 NFS4_VERIFIER_SIZE);
3899 }
3900 else if (nfserr == nfserr_clid_inuse) {
3901 p = xdr_reserve_space(xdr, 8);
3902 if (!p)
3903 return nfserr_resource;
3904 *p++ = cpu_to_be32(0);
3905 *p++ = cpu_to_be32(0);
3906 }
3907 return nfserr;
3908}
3909
3910static __be32
3911nfsd4_encode_write(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_write *write)
3912{
3913 struct xdr_stream *xdr = &resp->xdr;
3914 __be32 *p;
3915
3916 if (!nfserr) {
3917 p = xdr_reserve_space(xdr, 16);
3918 if (!p)
3919 return nfserr_resource;
3920 *p++ = cpu_to_be32(write->wr_bytes_written);
3921 *p++ = cpu_to_be32(write->wr_how_written);
3922 p = xdr_encode_opaque_fixed(p, write->wr_verifier.data,
3923 NFS4_VERIFIER_SIZE);
3924 }
3925 return nfserr;
3926}
3927
3928static __be32
3929nfsd4_encode_exchange_id(struct nfsd4_compoundres *resp, __be32 nfserr,
3930 struct nfsd4_exchange_id *exid)
3931{
3932 struct xdr_stream *xdr = &resp->xdr;
3933 __be32 *p;
3934 char *major_id;
3935 char *server_scope;
3936 int major_id_sz;
3937 int server_scope_sz;
3938 int status = 0;
3939 uint64_t minor_id = 0;
3940
3941 if (nfserr)
3942 return nfserr;
3943
3944 major_id = utsname()->nodename;
3945 major_id_sz = strlen(major_id);
3946 server_scope = utsname()->nodename;
3947 server_scope_sz = strlen(server_scope);
3948
3949 p = xdr_reserve_space(xdr,
3950 8 +
3951 4 +
3952 4 +
3953 4 );
3954 if (!p)
3955 return nfserr_resource;
3956
3957 p = xdr_encode_opaque_fixed(p, &exid->clientid, 8);
3958 *p++ = cpu_to_be32(exid->seqid);
3959 *p++ = cpu_to_be32(exid->flags);
3960
3961 *p++ = cpu_to_be32(exid->spa_how);
3962
3963 switch (exid->spa_how) {
3964 case SP4_NONE:
3965 break;
3966 case SP4_MACH_CRED:
3967
3968 status = nfsd4_encode_bitmap(xdr,
3969 exid->spo_must_enforce[0],
3970 exid->spo_must_enforce[1],
3971 exid->spo_must_enforce[2]);
3972 if (status)
3973 goto out;
3974
3975 status = nfsd4_encode_bitmap(xdr,
3976 exid->spo_must_allow[0],
3977 exid->spo_must_allow[1],
3978 exid->spo_must_allow[2]);
3979 if (status)
3980 goto out;
3981 break;
3982 default:
3983 WARN_ON_ONCE(1);
3984 }
3985
3986 p = xdr_reserve_space(xdr,
3987 8 +
3988 4 +
3989 (XDR_QUADLEN(major_id_sz) * 4) +
3990 4 +
3991 (XDR_QUADLEN(server_scope_sz) * 4) +
3992 4 );
3993 if (!p)
3994 return nfserr_resource;
3995
3996
3997 p = xdr_encode_hyper(p, minor_id);
3998
3999 p = xdr_encode_opaque(p, major_id, major_id_sz);
4000
4001
4002 p = xdr_encode_opaque(p, server_scope, server_scope_sz);
4003
4004
4005 *p++ = cpu_to_be32(0);
4006 return 0;
4007out:
4008 return status;
4009}
4010
4011static __be32
4012nfsd4_encode_create_session(struct nfsd4_compoundres *resp, __be32 nfserr,
4013 struct nfsd4_create_session *sess)
4014{
4015 struct xdr_stream *xdr = &resp->xdr;
4016 __be32 *p;
4017
4018 if (nfserr)
4019 return nfserr;
4020
4021 p = xdr_reserve_space(xdr, 24);
4022 if (!p)
4023 return nfserr_resource;
4024 p = xdr_encode_opaque_fixed(p, sess->sessionid.data,
4025 NFS4_MAX_SESSIONID_LEN);
4026 *p++ = cpu_to_be32(sess->seqid);
4027 *p++ = cpu_to_be32(sess->flags);
4028
4029 p = xdr_reserve_space(xdr, 28);
4030 if (!p)
4031 return nfserr_resource;
4032 *p++ = cpu_to_be32(0);
4033 *p++ = cpu_to_be32(sess->fore_channel.maxreq_sz);
4034 *p++ = cpu_to_be32(sess->fore_channel.maxresp_sz);
4035 *p++ = cpu_to_be32(sess->fore_channel.maxresp_cached);
4036 *p++ = cpu_to_be32(sess->fore_channel.maxops);
4037 *p++ = cpu_to_be32(sess->fore_channel.maxreqs);
4038 *p++ = cpu_to_be32(sess->fore_channel.nr_rdma_attrs);
4039
4040 if (sess->fore_channel.nr_rdma_attrs) {
4041 p = xdr_reserve_space(xdr, 4);
4042 if (!p)
4043 return nfserr_resource;
4044 *p++ = cpu_to_be32(sess->fore_channel.rdma_attrs);
4045 }
4046
4047 p = xdr_reserve_space(xdr, 28);
4048 if (!p)
4049 return nfserr_resource;
4050 *p++ = cpu_to_be32(0);
4051 *p++ = cpu_to_be32(sess->back_channel.maxreq_sz);
4052 *p++ = cpu_to_be32(sess->back_channel.maxresp_sz);
4053 *p++ = cpu_to_be32(sess->back_channel.maxresp_cached);
4054 *p++ = cpu_to_be32(sess->back_channel.maxops);
4055 *p++ = cpu_to_be32(sess->back_channel.maxreqs);
4056 *p++ = cpu_to_be32(sess->back_channel.nr_rdma_attrs);
4057
4058 if (sess->back_channel.nr_rdma_attrs) {
4059 p = xdr_reserve_space(xdr, 4);
4060 if (!p)
4061 return nfserr_resource;
4062 *p++ = cpu_to_be32(sess->back_channel.rdma_attrs);
4063 }
4064 return 0;
4065}
4066
4067static __be32
4068nfsd4_encode_sequence(struct nfsd4_compoundres *resp, __be32 nfserr,
4069 struct nfsd4_sequence *seq)
4070{
4071 struct xdr_stream *xdr = &resp->xdr;
4072 __be32 *p;
4073
4074 if (nfserr)
4075 return nfserr;
4076
4077 p = xdr_reserve_space(xdr, NFS4_MAX_SESSIONID_LEN + 20);
4078 if (!p)
4079 return nfserr_resource;
4080 p = xdr_encode_opaque_fixed(p, seq->sessionid.data,
4081 NFS4_MAX_SESSIONID_LEN);
4082 *p++ = cpu_to_be32(seq->seqid);
4083 *p++ = cpu_to_be32(seq->slotid);
4084
4085 *p++ = cpu_to_be32(seq->maxslots - 1);
4086 *p++ = cpu_to_be32(seq->maxslots - 1);
4087 *p++ = cpu_to_be32(seq->status_flags);
4088
4089 resp->cstate.data_offset = xdr->buf->len;
4090 return 0;
4091}
4092
4093static __be32
4094nfsd4_encode_test_stateid(struct nfsd4_compoundres *resp, __be32 nfserr,
4095 struct nfsd4_test_stateid *test_stateid)
4096{
4097 struct xdr_stream *xdr = &resp->xdr;
4098 struct nfsd4_test_stateid_id *stateid, *next;
4099 __be32 *p;
4100
4101 if (nfserr)
4102 return nfserr;
4103
4104 p = xdr_reserve_space(xdr, 4 + (4 * test_stateid->ts_num_ids));
4105 if (!p)
4106 return nfserr_resource;
4107 *p++ = htonl(test_stateid->ts_num_ids);
4108
4109 list_for_each_entry_safe(stateid, next, &test_stateid->ts_stateid_list, ts_id_list) {
4110 *p++ = stateid->ts_id_status;
4111 }
4112
4113 return nfserr;
4114}
4115
4116#ifdef CONFIG_NFSD_PNFS
4117static __be32
4118nfsd4_encode_getdeviceinfo(struct nfsd4_compoundres *resp, __be32 nfserr,
4119 struct nfsd4_getdeviceinfo *gdev)
4120{
4121 struct xdr_stream *xdr = &resp->xdr;
4122 const struct nfsd4_layout_ops *ops =
4123 nfsd4_layout_ops[gdev->gd_layout_type];
4124 u32 starting_len = xdr->buf->len, needed_len;
4125 __be32 *p;
4126
4127 dprintk("%s: err %d\n", __func__, be32_to_cpu(nfserr));
4128 if (nfserr)
4129 goto out;
4130
4131 nfserr = nfserr_resource;
4132 p = xdr_reserve_space(xdr, 4);
4133 if (!p)
4134 goto out;
4135
4136 *p++ = cpu_to_be32(gdev->gd_layout_type);
4137
4138
4139 if (gdev->gd_maxcount != 0) {
4140 nfserr = ops->encode_getdeviceinfo(xdr, gdev);
4141 if (nfserr) {
4142
4143
4144
4145
4146
4147 if (xdr->buf->len + 4 > gdev->gd_maxcount)
4148 goto toosmall;
4149 goto out;
4150 }
4151 }
4152
4153 nfserr = nfserr_resource;
4154 if (gdev->gd_notify_types) {
4155 p = xdr_reserve_space(xdr, 4 + 4);
4156 if (!p)
4157 goto out;
4158 *p++ = cpu_to_be32(1);
4159 *p++ = cpu_to_be32(gdev->gd_notify_types);
4160 } else {
4161 p = xdr_reserve_space(xdr, 4);
4162 if (!p)
4163 goto out;
4164 *p++ = 0;
4165 }
4166
4167 nfserr = 0;
4168out:
4169 kfree(gdev->gd_device);
4170 dprintk("%s: done: %d\n", __func__, be32_to_cpu(nfserr));
4171 return nfserr;
4172
4173toosmall:
4174 dprintk("%s: maxcount too small\n", __func__);
4175 needed_len = xdr->buf->len + 4 ;
4176 xdr_truncate_encode(xdr, starting_len);
4177 p = xdr_reserve_space(xdr, 4);
4178 if (!p) {
4179 nfserr = nfserr_resource;
4180 } else {
4181 *p++ = cpu_to_be32(needed_len);
4182 nfserr = nfserr_toosmall;
4183 }
4184 goto out;
4185}
4186
4187static __be32
4188nfsd4_encode_layoutget(struct nfsd4_compoundres *resp, __be32 nfserr,
4189 struct nfsd4_layoutget *lgp)
4190{
4191 struct xdr_stream *xdr = &resp->xdr;
4192 const struct nfsd4_layout_ops *ops =
4193 nfsd4_layout_ops[lgp->lg_layout_type];
4194 __be32 *p;
4195
4196 dprintk("%s: err %d\n", __func__, nfserr);
4197 if (nfserr)
4198 goto out;
4199
4200 nfserr = nfserr_resource;
4201 p = xdr_reserve_space(xdr, 36 + sizeof(stateid_opaque_t));
4202 if (!p)
4203 goto out;
4204
4205 *p++ = cpu_to_be32(1);
4206 *p++ = cpu_to_be32(lgp->lg_sid.si_generation);
4207 p = xdr_encode_opaque_fixed(p, &lgp->lg_sid.si_opaque,
4208 sizeof(stateid_opaque_t));
4209
4210 *p++ = cpu_to_be32(1);
4211 p = xdr_encode_hyper(p, lgp->lg_seg.offset);
4212 p = xdr_encode_hyper(p, lgp->lg_seg.length);
4213 *p++ = cpu_to_be32(lgp->lg_seg.iomode);
4214 *p++ = cpu_to_be32(lgp->lg_layout_type);
4215
4216 nfserr = ops->encode_layoutget(xdr, lgp);
4217out:
4218 kfree(lgp->lg_content);
4219 return nfserr;
4220}
4221
4222static __be32
4223nfsd4_encode_layoutcommit(struct nfsd4_compoundres *resp, __be32 nfserr,
4224 struct nfsd4_layoutcommit *lcp)
4225{
4226 struct xdr_stream *xdr = &resp->xdr;
4227 __be32 *p;
4228
4229 if (nfserr)
4230 return nfserr;
4231
4232 p = xdr_reserve_space(xdr, 4);
4233 if (!p)
4234 return nfserr_resource;
4235 *p++ = cpu_to_be32(lcp->lc_size_chg);
4236 if (lcp->lc_size_chg) {
4237 p = xdr_reserve_space(xdr, 8);
4238 if (!p)
4239 return nfserr_resource;
4240 p = xdr_encode_hyper(p, lcp->lc_newsize);
4241 }
4242
4243 return nfs_ok;
4244}
4245
4246static __be32
4247nfsd4_encode_layoutreturn(struct nfsd4_compoundres *resp, __be32 nfserr,
4248 struct nfsd4_layoutreturn *lrp)
4249{
4250 struct xdr_stream *xdr = &resp->xdr;
4251 __be32 *p;
4252
4253 if (nfserr)
4254 return nfserr;
4255
4256 p = xdr_reserve_space(xdr, 4);
4257 if (!p)
4258 return nfserr_resource;
4259 *p++ = cpu_to_be32(lrp->lrs_present);
4260 if (lrp->lrs_present)
4261 return nfsd4_encode_stateid(xdr, &lrp->lr_sid);
4262 return nfs_ok;
4263}
4264#endif
4265
4266static __be32
4267nfsd42_encode_write_res(struct nfsd4_compoundres *resp, struct nfsd42_write_res *write)
4268{
4269 __be32 *p;
4270
4271 p = xdr_reserve_space(&resp->xdr, 4 + 8 + 4 + NFS4_VERIFIER_SIZE);
4272 if (!p)
4273 return nfserr_resource;
4274
4275 *p++ = cpu_to_be32(0);
4276 p = xdr_encode_hyper(p, write->wr_bytes_written);
4277 *p++ = cpu_to_be32(write->wr_stable_how);
4278 p = xdr_encode_opaque_fixed(p, write->wr_verifier.data,
4279 NFS4_VERIFIER_SIZE);
4280 return nfs_ok;
4281}
4282
4283static __be32
4284nfsd4_encode_copy(struct nfsd4_compoundres *resp, __be32 nfserr,
4285 struct nfsd4_copy *copy)
4286{
4287 __be32 *p;
4288
4289 if (!nfserr) {
4290 nfserr = nfsd42_encode_write_res(resp, ©->cp_res);
4291 if (nfserr)
4292 return nfserr;
4293
4294 p = xdr_reserve_space(&resp->xdr, 4 + 4);
4295 *p++ = cpu_to_be32(copy->cp_consecutive);
4296 *p++ = cpu_to_be32(copy->cp_synchronous);
4297 }
4298 return nfserr;
4299}
4300
4301static __be32
4302nfsd4_encode_seek(struct nfsd4_compoundres *resp, __be32 nfserr,
4303 struct nfsd4_seek *seek)
4304{
4305 __be32 *p;
4306
4307 if (nfserr)
4308 return nfserr;
4309
4310 p = xdr_reserve_space(&resp->xdr, 4 + 8);
4311 *p++ = cpu_to_be32(seek->seek_eof);
4312 p = xdr_encode_hyper(p, seek->seek_pos);
4313
4314 return nfserr;
4315}
4316
4317static __be32
4318nfsd4_encode_noop(struct nfsd4_compoundres *resp, __be32 nfserr, void *p)
4319{
4320 return nfserr;
4321}
4322
4323typedef __be32(* nfsd4_enc)(struct nfsd4_compoundres *, __be32, void *);
4324
4325
4326
4327
4328
4329
4330static nfsd4_enc nfsd4_enc_ops[] = {
4331 [OP_ACCESS] = (nfsd4_enc)nfsd4_encode_access,
4332 [OP_CLOSE] = (nfsd4_enc)nfsd4_encode_close,
4333 [OP_COMMIT] = (nfsd4_enc)nfsd4_encode_commit,
4334 [OP_CREATE] = (nfsd4_enc)nfsd4_encode_create,
4335 [OP_DELEGPURGE] = (nfsd4_enc)nfsd4_encode_noop,
4336 [OP_DELEGRETURN] = (nfsd4_enc)nfsd4_encode_noop,
4337 [OP_GETATTR] = (nfsd4_enc)nfsd4_encode_getattr,
4338 [OP_GETFH] = (nfsd4_enc)nfsd4_encode_getfh,
4339 [OP_LINK] = (nfsd4_enc)nfsd4_encode_link,
4340 [OP_LOCK] = (nfsd4_enc)nfsd4_encode_lock,
4341 [OP_LOCKT] = (nfsd4_enc)nfsd4_encode_lockt,
4342 [OP_LOCKU] = (nfsd4_enc)nfsd4_encode_locku,
4343 [OP_LOOKUP] = (nfsd4_enc)nfsd4_encode_noop,
4344 [OP_LOOKUPP] = (nfsd4_enc)nfsd4_encode_noop,
4345 [OP_NVERIFY] = (nfsd4_enc)nfsd4_encode_noop,
4346 [OP_OPEN] = (nfsd4_enc)nfsd4_encode_open,
4347 [OP_OPENATTR] = (nfsd4_enc)nfsd4_encode_noop,
4348 [OP_OPEN_CONFIRM] = (nfsd4_enc)nfsd4_encode_open_confirm,
4349 [OP_OPEN_DOWNGRADE] = (nfsd4_enc)nfsd4_encode_open_downgrade,
4350 [OP_PUTFH] = (nfsd4_enc)nfsd4_encode_noop,
4351 [OP_PUTPUBFH] = (nfsd4_enc)nfsd4_encode_noop,
4352 [OP_PUTROOTFH] = (nfsd4_enc)nfsd4_encode_noop,
4353 [OP_READ] = (nfsd4_enc)nfsd4_encode_read,
4354 [OP_READDIR] = (nfsd4_enc)nfsd4_encode_readdir,
4355 [OP_READLINK] = (nfsd4_enc)nfsd4_encode_readlink,
4356 [OP_REMOVE] = (nfsd4_enc)nfsd4_encode_remove,
4357 [OP_RENAME] = (nfsd4_enc)nfsd4_encode_rename,
4358 [OP_RENEW] = (nfsd4_enc)nfsd4_encode_noop,
4359 [OP_RESTOREFH] = (nfsd4_enc)nfsd4_encode_noop,
4360 [OP_SAVEFH] = (nfsd4_enc)nfsd4_encode_noop,
4361 [OP_SECINFO] = (nfsd4_enc)nfsd4_encode_secinfo,
4362 [OP_SETATTR] = (nfsd4_enc)nfsd4_encode_setattr,
4363 [OP_SETCLIENTID] = (nfsd4_enc)nfsd4_encode_setclientid,
4364 [OP_SETCLIENTID_CONFIRM] = (nfsd4_enc)nfsd4_encode_noop,
4365 [OP_VERIFY] = (nfsd4_enc)nfsd4_encode_noop,
4366 [OP_WRITE] = (nfsd4_enc)nfsd4_encode_write,
4367 [OP_RELEASE_LOCKOWNER] = (nfsd4_enc)nfsd4_encode_noop,
4368
4369
4370 [OP_BACKCHANNEL_CTL] = (nfsd4_enc)nfsd4_encode_noop,
4371 [OP_BIND_CONN_TO_SESSION] = (nfsd4_enc)nfsd4_encode_bind_conn_to_session,
4372 [OP_EXCHANGE_ID] = (nfsd4_enc)nfsd4_encode_exchange_id,
4373 [OP_CREATE_SESSION] = (nfsd4_enc)nfsd4_encode_create_session,
4374 [OP_DESTROY_SESSION] = (nfsd4_enc)nfsd4_encode_noop,
4375 [OP_FREE_STATEID] = (nfsd4_enc)nfsd4_encode_noop,
4376 [OP_GET_DIR_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop,
4377#ifdef CONFIG_NFSD_PNFS
4378 [OP_GETDEVICEINFO] = (nfsd4_enc)nfsd4_encode_getdeviceinfo,
4379 [OP_GETDEVICELIST] = (nfsd4_enc)nfsd4_encode_noop,
4380 [OP_LAYOUTCOMMIT] = (nfsd4_enc)nfsd4_encode_layoutcommit,
4381 [OP_LAYOUTGET] = (nfsd4_enc)nfsd4_encode_layoutget,
4382 [OP_LAYOUTRETURN] = (nfsd4_enc)nfsd4_encode_layoutreturn,
4383#else
4384 [OP_GETDEVICEINFO] = (nfsd4_enc)nfsd4_encode_noop,
4385 [OP_GETDEVICELIST] = (nfsd4_enc)nfsd4_encode_noop,
4386 [OP_LAYOUTCOMMIT] = (nfsd4_enc)nfsd4_encode_noop,
4387 [OP_LAYOUTGET] = (nfsd4_enc)nfsd4_encode_noop,
4388 [OP_LAYOUTRETURN] = (nfsd4_enc)nfsd4_encode_noop,
4389#endif
4390 [OP_SECINFO_NO_NAME] = (nfsd4_enc)nfsd4_encode_secinfo_no_name,
4391 [OP_SEQUENCE] = (nfsd4_enc)nfsd4_encode_sequence,
4392 [OP_SET_SSV] = (nfsd4_enc)nfsd4_encode_noop,
4393 [OP_TEST_STATEID] = (nfsd4_enc)nfsd4_encode_test_stateid,
4394 [OP_WANT_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop,
4395 [OP_DESTROY_CLIENTID] = (nfsd4_enc)nfsd4_encode_noop,
4396 [OP_RECLAIM_COMPLETE] = (nfsd4_enc)nfsd4_encode_noop,
4397
4398
4399 [OP_ALLOCATE] = (nfsd4_enc)nfsd4_encode_noop,
4400 [OP_COPY] = (nfsd4_enc)nfsd4_encode_copy,
4401 [OP_COPY_NOTIFY] = (nfsd4_enc)nfsd4_encode_noop,
4402 [OP_DEALLOCATE] = (nfsd4_enc)nfsd4_encode_noop,
4403 [OP_IO_ADVISE] = (nfsd4_enc)nfsd4_encode_noop,
4404 [OP_LAYOUTERROR] = (nfsd4_enc)nfsd4_encode_noop,
4405 [OP_LAYOUTSTATS] = (nfsd4_enc)nfsd4_encode_noop,
4406 [OP_OFFLOAD_CANCEL] = (nfsd4_enc)nfsd4_encode_noop,
4407 [OP_OFFLOAD_STATUS] = (nfsd4_enc)nfsd4_encode_noop,
4408 [OP_READ_PLUS] = (nfsd4_enc)nfsd4_encode_noop,
4409 [OP_SEEK] = (nfsd4_enc)nfsd4_encode_seek,
4410 [OP_WRITE_SAME] = (nfsd4_enc)nfsd4_encode_noop,
4411 [OP_CLONE] = (nfsd4_enc)nfsd4_encode_noop,
4412};
4413
4414
4415
4416
4417
4418
4419
4420
4421
4422
4423
4424
4425
4426
4427__be32 nfsd4_check_resp_size(struct nfsd4_compoundres *resp, u32 respsize)
4428{
4429 struct xdr_buf *buf = &resp->rqstp->rq_res;
4430 struct nfsd4_slot *slot = resp->cstate.slot;
4431
4432 if (buf->len + respsize <= buf->buflen)
4433 return nfs_ok;
4434 if (!nfsd4_has_session(&resp->cstate))
4435 return nfserr_resource;
4436 if (slot->sl_flags & NFSD4_SLOT_CACHETHIS) {
4437 WARN_ON_ONCE(1);
4438 return nfserr_rep_too_big_to_cache;
4439 }
4440 return nfserr_rep_too_big;
4441}
4442
4443void
4444nfsd4_encode_operation(struct nfsd4_compoundres *resp, struct nfsd4_op *op)
4445{
4446 struct xdr_stream *xdr = &resp->xdr;
4447 struct nfs4_stateowner *so = resp->cstate.replay_owner;
4448 struct svc_rqst *rqstp = resp->rqstp;
4449 int post_err_offset;
4450 nfsd4_enc encoder;
4451 __be32 *p;
4452
4453 p = xdr_reserve_space(xdr, 8);
4454 if (!p) {
4455 WARN_ON_ONCE(1);
4456 return;
4457 }
4458 *p++ = cpu_to_be32(op->opnum);
4459 post_err_offset = xdr->buf->len;
4460
4461 if (op->opnum == OP_ILLEGAL)
4462 goto status;
4463 BUG_ON(op->opnum < 0 || op->opnum >= ARRAY_SIZE(nfsd4_enc_ops) ||
4464 !nfsd4_enc_ops[op->opnum]);
4465 encoder = nfsd4_enc_ops[op->opnum];
4466 op->status = encoder(resp, op->status, &op->u);
4467 xdr_commit_encode(xdr);
4468
4469
4470 if (!op->status) {
4471 int space_needed = 0;
4472 if (!nfsd4_last_compound_op(rqstp))
4473 space_needed = COMPOUND_ERR_SLACK_SPACE;
4474 op->status = nfsd4_check_resp_size(resp, space_needed);
4475 }
4476 if (op->status == nfserr_resource && nfsd4_has_session(&resp->cstate)) {
4477 struct nfsd4_slot *slot = resp->cstate.slot;
4478
4479 if (slot->sl_flags & NFSD4_SLOT_CACHETHIS)
4480 op->status = nfserr_rep_too_big_to_cache;
4481 else
4482 op->status = nfserr_rep_too_big;
4483 }
4484 if (op->status == nfserr_resource ||
4485 op->status == nfserr_rep_too_big ||
4486 op->status == nfserr_rep_too_big_to_cache) {
4487
4488
4489
4490
4491
4492
4493
4494 warn_on_nonidempotent_op(op);
4495 xdr_truncate_encode(xdr, post_err_offset);
4496 }
4497 if (so) {
4498 int len = xdr->buf->len - post_err_offset;
4499
4500 so->so_replay.rp_status = op->status;
4501 so->so_replay.rp_buflen = len;
4502 read_bytes_from_xdr_buf(xdr->buf, post_err_offset,
4503 so->so_replay.rp_buf, len);
4504 }
4505status:
4506
4507 write_bytes_to_xdr_buf(xdr->buf, post_err_offset - 4, &op->status, 4);
4508}
4509
4510
4511
4512
4513
4514
4515
4516void
4517nfsd4_encode_replay(struct xdr_stream *xdr, struct nfsd4_op *op)
4518{
4519 __be32 *p;
4520 struct nfs4_replay *rp = op->replay;
4521
4522 BUG_ON(!rp);
4523
4524 p = xdr_reserve_space(xdr, 8 + rp->rp_buflen);
4525 if (!p) {
4526 WARN_ON_ONCE(1);
4527 return;
4528 }
4529 *p++ = cpu_to_be32(op->opnum);
4530 *p++ = rp->rp_status;
4531
4532 p = xdr_encode_opaque_fixed(p, rp->rp_buf, rp->rp_buflen);
4533}
4534
4535int
4536nfs4svc_encode_voidres(struct svc_rqst *rqstp, __be32 *p, void *dummy)
4537{
4538 return xdr_ressize_check(rqstp, p);
4539}
4540
4541int nfsd4_release_compoundargs(void *rq, __be32 *p, void *resp)
4542{
4543 struct svc_rqst *rqstp = rq;
4544 struct nfsd4_compoundargs *args = rqstp->rq_argp;
4545
4546 if (args->ops != args->iops) {
4547 kfree(args->ops);
4548 args->ops = args->iops;
4549 }
4550 kfree(args->tmpp);
4551 args->tmpp = NULL;
4552 while (args->to_free) {
4553 struct svcxdr_tmpbuf *tb = args->to_free;
4554 args->to_free = tb->next;
4555 kfree(tb);
4556 }
4557 return 1;
4558}
4559
4560int
4561nfs4svc_decode_compoundargs(struct svc_rqst *rqstp, __be32 *p, struct nfsd4_compoundargs *args)
4562{
4563 if (rqstp->rq_arg.head[0].iov_len % 4) {
4564
4565 dprintk("%s: compound not properly padded! (peeraddr=%pISc xid=0x%x)",
4566 __func__, svc_addr(rqstp), be32_to_cpu(rqstp->rq_xid));
4567 return 0;
4568 }
4569 args->p = p;
4570 args->end = rqstp->rq_arg.head[0].iov_base + rqstp->rq_arg.head[0].iov_len;
4571 args->pagelist = rqstp->rq_arg.pages;
4572 args->pagelen = rqstp->rq_arg.page_len;
4573 args->tmpp = NULL;
4574 args->to_free = NULL;
4575 args->ops = args->iops;
4576 args->rqstp = rqstp;
4577
4578 return !nfsd4_decode_compound(args);
4579}
4580
4581int
4582nfs4svc_encode_compoundres(struct svc_rqst *rqstp, __be32 *p, struct nfsd4_compoundres *resp)
4583{
4584
4585
4586
4587 struct xdr_buf *buf = resp->xdr.buf;
4588
4589 WARN_ON_ONCE(buf->len != buf->head[0].iov_len + buf->page_len +
4590 buf->tail[0].iov_len);
4591
4592 rqstp->rq_next_page = resp->xdr.page_ptr + 1;
4593
4594 p = resp->tagp;
4595 *p++ = htonl(resp->taglen);
4596 memcpy(p, resp->tag, resp->taglen);
4597 p += XDR_QUADLEN(resp->taglen);
4598 *p++ = htonl(resp->opcnt);
4599
4600 nfsd4_sequence_done(resp);
4601 return 1;
4602}
4603
4604
4605
4606
4607
4608
4609
