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36#include <linux/file.h>
37#include <linux/slab.h>
38#include <linux/namei.h>
39#include <linux/statfs.h>
40#include <linux/utsname.h>
41#include <linux/pagemap.h>
42#include <linux/sunrpc/svcauth_gss.h>
43#include <linux/sunrpc/addr.h>
44#include <linux/xattr.h>
45#include <uapi/linux/xattr.h>
46
47#include "idmap.h"
48#include "acl.h"
49#include "xdr4.h"
50#include "vfs.h"
51#include "state.h"
52#include "cache.h"
53#include "netns.h"
54#include "pnfs.h"
55#include "filecache.h"
56
57#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
58#include <linux/security.h>
59#endif
60
61
62#define NFSDDBG_FACILITY NFSDDBG_XDR
63
64const u32 nfsd_suppattrs[3][3] = {
65 {NFSD4_SUPPORTED_ATTRS_WORD0,
66 NFSD4_SUPPORTED_ATTRS_WORD1,
67 NFSD4_SUPPORTED_ATTRS_WORD2},
68
69 {NFSD4_1_SUPPORTED_ATTRS_WORD0,
70 NFSD4_1_SUPPORTED_ATTRS_WORD1,
71 NFSD4_1_SUPPORTED_ATTRS_WORD2},
72
73 {NFSD4_1_SUPPORTED_ATTRS_WORD0,
74 NFSD4_1_SUPPORTED_ATTRS_WORD1,
75 NFSD4_2_SUPPORTED_ATTRS_WORD2},
76};
77
78
79
80
81
82
83#define NFS4_REFERRAL_FSID_MAJOR 0x8000000ULL
84#define NFS4_REFERRAL_FSID_MINOR 0x8000000ULL
85
86static __be32
87check_filename(char *str, int len)
88{
89 int i;
90
91 if (len == 0)
92 return nfserr_inval;
93 if (isdotent(str, len))
94 return nfserr_badname;
95 for (i = 0; i < len; i++)
96 if (str[i] == '/')
97 return nfserr_badname;
98 return 0;
99}
100
101#define DECODE_HEAD \
102 __be32 *p; \
103 __be32 status
104#define DECODE_TAIL \
105 status = 0; \
106out: \
107 return status; \
108xdr_error: \
109 dprintk("NFSD: xdr error (%s:%d)\n", \
110 __FILE__, __LINE__); \
111 status = nfserr_bad_xdr; \
112 goto out
113
114#define READMEM(x,nbytes) do { \
115 x = (char *)p; \
116 p += XDR_QUADLEN(nbytes); \
117} while (0)
118#define SAVEMEM(x,nbytes) do { \
119 if (!(x = (p==argp->tmp || p == argp->tmpp) ? \
120 savemem(argp, p, nbytes) : \
121 (char *)p)) { \
122 dprintk("NFSD: xdr error (%s:%d)\n", \
123 __FILE__, __LINE__); \
124 goto xdr_error; \
125 } \
126 p += XDR_QUADLEN(nbytes); \
127} while (0)
128#define COPYMEM(x,nbytes) do { \
129 memcpy((x), p, nbytes); \
130 p += XDR_QUADLEN(nbytes); \
131} while (0)
132
133
134#define READ_BUF(nbytes) do { \
135 if (nbytes <= (u32)((char *)argp->end - (char *)argp->p)) { \
136 p = argp->p; \
137 argp->p += XDR_QUADLEN(nbytes); \
138 } else if (!(p = read_buf(argp, nbytes))) { \
139 dprintk("NFSD: xdr error (%s:%d)\n", \
140 __FILE__, __LINE__); \
141 goto xdr_error; \
142 } \
143} while (0)
144
145static void next_decode_page(struct nfsd4_compoundargs *argp)
146{
147 argp->p = page_address(argp->pagelist[0]);
148 argp->pagelist++;
149 if (argp->pagelen < PAGE_SIZE) {
150 argp->end = argp->p + XDR_QUADLEN(argp->pagelen);
151 argp->pagelen = 0;
152 } else {
153 argp->end = argp->p + (PAGE_SIZE>>2);
154 argp->pagelen -= PAGE_SIZE;
155 }
156}
157
158static __be32 *read_buf(struct nfsd4_compoundargs *argp, u32 nbytes)
159{
160
161
162
163 unsigned int avail = (char *)argp->end - (char *)argp->p;
164 __be32 *p;
165
166 if (argp->pagelen == 0) {
167 struct kvec *vec = &argp->rqstp->rq_arg.tail[0];
168
169 if (!argp->tail) {
170 argp->tail = true;
171 avail = vec->iov_len;
172 argp->p = vec->iov_base;
173 argp->end = vec->iov_base + avail;
174 }
175
176 if (avail < nbytes)
177 return NULL;
178
179 p = argp->p;
180 argp->p += XDR_QUADLEN(nbytes);
181 return p;
182 }
183
184 if (avail + argp->pagelen < nbytes)
185 return NULL;
186 if (avail + PAGE_SIZE < nbytes)
187 return NULL;
188
189 if (nbytes <= sizeof(argp->tmp))
190 p = argp->tmp;
191 else {
192 kfree(argp->tmpp);
193 p = argp->tmpp = kmalloc(nbytes, GFP_KERNEL);
194 if (!p)
195 return NULL;
196
197 }
198
199
200
201
202
203 memcpy(p, argp->p, avail);
204 next_decode_page(argp);
205 memcpy(((char*)p)+avail, argp->p, (nbytes - avail));
206 argp->p += XDR_QUADLEN(nbytes - avail);
207 return p;
208}
209
210static unsigned int compoundargs_bytes_left(struct nfsd4_compoundargs *argp)
211{
212 unsigned int this = (char *)argp->end - (char *)argp->p;
213
214 return this + argp->pagelen;
215}
216
217static int zero_clientid(clientid_t *clid)
218{
219 return (clid->cl_boot == 0) && (clid->cl_id == 0);
220}
221
222
223
224
225
226
227
228
229
230static void *
231svcxdr_tmpalloc(struct nfsd4_compoundargs *argp, u32 len)
232{
233 struct svcxdr_tmpbuf *tb;
234
235 tb = kmalloc(sizeof(*tb) + len, GFP_KERNEL);
236 if (!tb)
237 return NULL;
238 tb->next = argp->to_free;
239 argp->to_free = tb;
240 return tb->buf;
241}
242
243
244
245
246
247
248
249
250static char *
251svcxdr_dupstr(struct nfsd4_compoundargs *argp, void *buf, u32 len)
252{
253 char *p = svcxdr_tmpalloc(argp, len + 1);
254
255 if (!p)
256 return NULL;
257 memcpy(p, buf, len);
258 p[len] = '\0';
259 return p;
260}
261
262static __be32
263svcxdr_construct_vector(struct nfsd4_compoundargs *argp, struct kvec *head,
264 struct page ***pagelist, u32 buflen)
265{
266 int avail;
267 int len;
268 int pages;
269
270
271
272
273
274 avail = (char *)argp->end - (char *)argp->p;
275 if (avail + argp->pagelen < buflen) {
276 dprintk("NFSD: xdr error (%s:%d)\n",
277 __FILE__, __LINE__);
278 return nfserr_bad_xdr;
279 }
280 head->iov_base = argp->p;
281 head->iov_len = avail;
282 *pagelist = argp->pagelist;
283
284 len = XDR_QUADLEN(buflen) << 2;
285 if (len >= avail) {
286 len -= avail;
287
288 pages = len >> PAGE_SHIFT;
289 argp->pagelist += pages;
290 argp->pagelen -= pages * PAGE_SIZE;
291 len -= pages * PAGE_SIZE;
292
293 next_decode_page(argp);
294 }
295 argp->p += XDR_QUADLEN(len);
296
297 return 0;
298}
299
300
301
302
303
304
305
306
307
308
309
310static char *savemem(struct nfsd4_compoundargs *argp, __be32 *p, int nbytes)
311{
312 void *ret;
313
314 ret = svcxdr_tmpalloc(argp, nbytes);
315 if (!ret)
316 return NULL;
317 memcpy(ret, p, nbytes);
318 return ret;
319}
320
321static __be32
322nfsd4_decode_time(struct nfsd4_compoundargs *argp, struct timespec64 *tv)
323{
324 DECODE_HEAD;
325
326 READ_BUF(12);
327 p = xdr_decode_hyper(p, &tv->tv_sec);
328 tv->tv_nsec = be32_to_cpup(p++);
329 if (tv->tv_nsec >= (u32)1000000000)
330 return nfserr_inval;
331
332 DECODE_TAIL;
333}
334
335static __be32
336nfsd4_decode_bitmap(struct nfsd4_compoundargs *argp, u32 *bmval)
337{
338 u32 bmlen;
339 DECODE_HEAD;
340
341 bmval[0] = 0;
342 bmval[1] = 0;
343 bmval[2] = 0;
344
345 READ_BUF(4);
346 bmlen = be32_to_cpup(p++);
347 if (bmlen > 1000)
348 goto xdr_error;
349
350 READ_BUF(bmlen << 2);
351 if (bmlen > 0)
352 bmval[0] = be32_to_cpup(p++);
353 if (bmlen > 1)
354 bmval[1] = be32_to_cpup(p++);
355 if (bmlen > 2)
356 bmval[2] = be32_to_cpup(p++);
357
358 DECODE_TAIL;
359}
360
361static __be32
362nfsd4_decode_fattr(struct nfsd4_compoundargs *argp, u32 *bmval,
363 struct iattr *iattr, struct nfs4_acl **acl,
364 struct xdr_netobj *label, int *umask)
365{
366 int expected_len, len = 0;
367 u32 dummy32;
368 char *buf;
369
370 DECODE_HEAD;
371 iattr->ia_valid = 0;
372 if ((status = nfsd4_decode_bitmap(argp, bmval)))
373 return status;
374
375 if (bmval[0] & ~NFSD_WRITEABLE_ATTRS_WORD0
376 || bmval[1] & ~NFSD_WRITEABLE_ATTRS_WORD1
377 || bmval[2] & ~NFSD_WRITEABLE_ATTRS_WORD2) {
378 if (nfsd_attrs_supported(argp->minorversion, bmval))
379 return nfserr_inval;
380 return nfserr_attrnotsupp;
381 }
382
383 READ_BUF(4);
384 expected_len = be32_to_cpup(p++);
385
386 if (bmval[0] & FATTR4_WORD0_SIZE) {
387 READ_BUF(8);
388 len += 8;
389 p = xdr_decode_hyper(p, &iattr->ia_size);
390 iattr->ia_valid |= ATTR_SIZE;
391 }
392 if (bmval[0] & FATTR4_WORD0_ACL) {
393 u32 nace;
394 struct nfs4_ace *ace;
395
396 READ_BUF(4); len += 4;
397 nace = be32_to_cpup(p++);
398
399 if (nace > compoundargs_bytes_left(argp)/20)
400
401
402
403
404
405 return nfserr_fbig;
406
407 *acl = svcxdr_tmpalloc(argp, nfs4_acl_bytes(nace));
408 if (*acl == NULL)
409 return nfserr_jukebox;
410
411 (*acl)->naces = nace;
412 for (ace = (*acl)->aces; ace < (*acl)->aces + nace; ace++) {
413 READ_BUF(16); len += 16;
414 ace->type = be32_to_cpup(p++);
415 ace->flag = be32_to_cpup(p++);
416 ace->access_mask = be32_to_cpup(p++);
417 dummy32 = be32_to_cpup(p++);
418 READ_BUF(dummy32);
419 len += XDR_QUADLEN(dummy32) << 2;
420 READMEM(buf, dummy32);
421 ace->whotype = nfs4_acl_get_whotype(buf, dummy32);
422 status = nfs_ok;
423 if (ace->whotype != NFS4_ACL_WHO_NAMED)
424 ;
425 else if (ace->flag & NFS4_ACE_IDENTIFIER_GROUP)
426 status = nfsd_map_name_to_gid(argp->rqstp,
427 buf, dummy32, &ace->who_gid);
428 else
429 status = nfsd_map_name_to_uid(argp->rqstp,
430 buf, dummy32, &ace->who_uid);
431 if (status)
432 return status;
433 }
434 } else
435 *acl = NULL;
436 if (bmval[1] & FATTR4_WORD1_MODE) {
437 READ_BUF(4);
438 len += 4;
439 iattr->ia_mode = be32_to_cpup(p++);
440 iattr->ia_mode &= (S_IFMT | S_IALLUGO);
441 iattr->ia_valid |= ATTR_MODE;
442 }
443 if (bmval[1] & FATTR4_WORD1_OWNER) {
444 READ_BUF(4);
445 len += 4;
446 dummy32 = be32_to_cpup(p++);
447 READ_BUF(dummy32);
448 len += (XDR_QUADLEN(dummy32) << 2);
449 READMEM(buf, dummy32);
450 if ((status = nfsd_map_name_to_uid(argp->rqstp, buf, dummy32, &iattr->ia_uid)))
451 return status;
452 iattr->ia_valid |= ATTR_UID;
453 }
454 if (bmval[1] & FATTR4_WORD1_OWNER_GROUP) {
455 READ_BUF(4);
456 len += 4;
457 dummy32 = be32_to_cpup(p++);
458 READ_BUF(dummy32);
459 len += (XDR_QUADLEN(dummy32) << 2);
460 READMEM(buf, dummy32);
461 if ((status = nfsd_map_name_to_gid(argp->rqstp, buf, dummy32, &iattr->ia_gid)))
462 return status;
463 iattr->ia_valid |= ATTR_GID;
464 }
465 if (bmval[1] & FATTR4_WORD1_TIME_ACCESS_SET) {
466 READ_BUF(4);
467 len += 4;
468 dummy32 = be32_to_cpup(p++);
469 switch (dummy32) {
470 case NFS4_SET_TO_CLIENT_TIME:
471 len += 12;
472 status = nfsd4_decode_time(argp, &iattr->ia_atime);
473 if (status)
474 return status;
475 iattr->ia_valid |= (ATTR_ATIME | ATTR_ATIME_SET);
476 break;
477 case NFS4_SET_TO_SERVER_TIME:
478 iattr->ia_valid |= ATTR_ATIME;
479 break;
480 default:
481 goto xdr_error;
482 }
483 }
484 if (bmval[1] & FATTR4_WORD1_TIME_MODIFY_SET) {
485 READ_BUF(4);
486 len += 4;
487 dummy32 = be32_to_cpup(p++);
488 switch (dummy32) {
489 case NFS4_SET_TO_CLIENT_TIME:
490 len += 12;
491 status = nfsd4_decode_time(argp, &iattr->ia_mtime);
492 if (status)
493 return status;
494 iattr->ia_valid |= (ATTR_MTIME | ATTR_MTIME_SET);
495 break;
496 case NFS4_SET_TO_SERVER_TIME:
497 iattr->ia_valid |= ATTR_MTIME;
498 break;
499 default:
500 goto xdr_error;
501 }
502 }
503
504 label->len = 0;
505 if (IS_ENABLED(CONFIG_NFSD_V4_SECURITY_LABEL) &&
506 bmval[2] & FATTR4_WORD2_SECURITY_LABEL) {
507 READ_BUF(4);
508 len += 4;
509 dummy32 = be32_to_cpup(p++);
510 READ_BUF(4);
511 len += 4;
512 dummy32 = be32_to_cpup(p++);
513 READ_BUF(4);
514 len += 4;
515 dummy32 = be32_to_cpup(p++);
516 READ_BUF(dummy32);
517 if (dummy32 > NFS4_MAXLABELLEN)
518 return nfserr_badlabel;
519 len += (XDR_QUADLEN(dummy32) << 2);
520 READMEM(buf, dummy32);
521 label->len = dummy32;
522 label->data = svcxdr_dupstr(argp, buf, dummy32);
523 if (!label->data)
524 return nfserr_jukebox;
525 }
526 if (bmval[2] & FATTR4_WORD2_MODE_UMASK) {
527 if (!umask)
528 goto xdr_error;
529 READ_BUF(8);
530 len += 8;
531 dummy32 = be32_to_cpup(p++);
532 iattr->ia_mode = dummy32 & (S_IFMT | S_IALLUGO);
533 dummy32 = be32_to_cpup(p++);
534 *umask = dummy32 & S_IRWXUGO;
535 iattr->ia_valid |= ATTR_MODE;
536 }
537 if (len != expected_len)
538 goto xdr_error;
539
540 DECODE_TAIL;
541}
542
543static __be32
544nfsd4_decode_stateid(struct nfsd4_compoundargs *argp, stateid_t *sid)
545{
546 DECODE_HEAD;
547
548 READ_BUF(sizeof(stateid_t));
549 sid->si_generation = be32_to_cpup(p++);
550 COPYMEM(&sid->si_opaque, sizeof(stateid_opaque_t));
551
552 DECODE_TAIL;
553}
554
555static __be32
556nfsd4_decode_access(struct nfsd4_compoundargs *argp, struct nfsd4_access *access)
557{
558 DECODE_HEAD;
559
560 READ_BUF(4);
561 access->ac_req_access = be32_to_cpup(p++);
562
563 DECODE_TAIL;
564}
565
566static __be32 nfsd4_decode_cb_sec(struct nfsd4_compoundargs *argp, struct nfsd4_cb_sec *cbs)
567{
568 DECODE_HEAD;
569 struct user_namespace *userns = nfsd_user_namespace(argp->rqstp);
570 u32 dummy, uid, gid;
571 char *machine_name;
572 int i;
573 int nr_secflavs;
574
575
576 READ_BUF(4);
577 nr_secflavs = be32_to_cpup(p++);
578 if (nr_secflavs)
579 cbs->flavor = (u32)(-1);
580 else
581
582 cbs->flavor = 0;
583 for (i = 0; i < nr_secflavs; ++i) {
584 READ_BUF(4);
585 dummy = be32_to_cpup(p++);
586 switch (dummy) {
587 case RPC_AUTH_NULL:
588
589 if (cbs->flavor == (u32)(-1))
590 cbs->flavor = RPC_AUTH_NULL;
591 break;
592 case RPC_AUTH_UNIX:
593 READ_BUF(8);
594
595 dummy = be32_to_cpup(p++);
596
597
598 dummy = be32_to_cpup(p++);
599 READ_BUF(dummy);
600 SAVEMEM(machine_name, dummy);
601
602
603 READ_BUF(8);
604 uid = be32_to_cpup(p++);
605 gid = be32_to_cpup(p++);
606
607
608 READ_BUF(4);
609 dummy = be32_to_cpup(p++);
610 READ_BUF(dummy * 4);
611 if (cbs->flavor == (u32)(-1)) {
612 kuid_t kuid = make_kuid(userns, uid);
613 kgid_t kgid = make_kgid(userns, gid);
614 if (uid_valid(kuid) && gid_valid(kgid)) {
615 cbs->uid = kuid;
616 cbs->gid = kgid;
617 cbs->flavor = RPC_AUTH_UNIX;
618 } else {
619 dprintk("RPC_AUTH_UNIX with invalid"
620 "uid or gid ignoring!\n");
621 }
622 }
623 break;
624 case RPC_AUTH_GSS:
625 dprintk("RPC_AUTH_GSS callback secflavor "
626 "not supported!\n");
627 READ_BUF(8);
628
629 dummy = be32_to_cpup(p++);
630
631 dummy = be32_to_cpup(p++);
632 READ_BUF(dummy);
633 p += XDR_QUADLEN(dummy);
634
635 READ_BUF(4);
636 dummy = be32_to_cpup(p++);
637 READ_BUF(dummy);
638 break;
639 default:
640 dprintk("Illegal callback secflavor\n");
641 return nfserr_inval;
642 }
643 }
644 DECODE_TAIL;
645}
646
647static __be32 nfsd4_decode_backchannel_ctl(struct nfsd4_compoundargs *argp, struct nfsd4_backchannel_ctl *bc)
648{
649 DECODE_HEAD;
650
651 READ_BUF(4);
652 bc->bc_cb_program = be32_to_cpup(p++);
653 nfsd4_decode_cb_sec(argp, &bc->bc_cb_sec);
654
655 DECODE_TAIL;
656}
657
658static __be32 nfsd4_decode_bind_conn_to_session(struct nfsd4_compoundargs *argp, struct nfsd4_bind_conn_to_session *bcts)
659{
660 DECODE_HEAD;
661
662 READ_BUF(NFS4_MAX_SESSIONID_LEN + 8);
663 COPYMEM(bcts->sessionid.data, NFS4_MAX_SESSIONID_LEN);
664 bcts->dir = be32_to_cpup(p++);
665
666
667 DECODE_TAIL;
668}
669
670static __be32
671nfsd4_decode_close(struct nfsd4_compoundargs *argp, struct nfsd4_close *close)
672{
673 DECODE_HEAD;
674
675 READ_BUF(4);
676 close->cl_seqid = be32_to_cpup(p++);
677 return nfsd4_decode_stateid(argp, &close->cl_stateid);
678
679 DECODE_TAIL;
680}
681
682
683static __be32
684nfsd4_decode_commit(struct nfsd4_compoundargs *argp, struct nfsd4_commit *commit)
685{
686 DECODE_HEAD;
687
688 READ_BUF(12);
689 p = xdr_decode_hyper(p, &commit->co_offset);
690 commit->co_count = be32_to_cpup(p++);
691
692 DECODE_TAIL;
693}
694
695static __be32
696nfsd4_decode_create(struct nfsd4_compoundargs *argp, struct nfsd4_create *create)
697{
698 DECODE_HEAD;
699
700 READ_BUF(4);
701 create->cr_type = be32_to_cpup(p++);
702 switch (create->cr_type) {
703 case NF4LNK:
704 READ_BUF(4);
705 create->cr_datalen = be32_to_cpup(p++);
706 READ_BUF(create->cr_datalen);
707 create->cr_data = svcxdr_dupstr(argp, p, create->cr_datalen);
708 if (!create->cr_data)
709 return nfserr_jukebox;
710 break;
711 case NF4BLK:
712 case NF4CHR:
713 READ_BUF(8);
714 create->cr_specdata1 = be32_to_cpup(p++);
715 create->cr_specdata2 = be32_to_cpup(p++);
716 break;
717 case NF4SOCK:
718 case NF4FIFO:
719 case NF4DIR:
720 default:
721 break;
722 }
723
724 READ_BUF(4);
725 create->cr_namelen = be32_to_cpup(p++);
726 READ_BUF(create->cr_namelen);
727 SAVEMEM(create->cr_name, create->cr_namelen);
728 if ((status = check_filename(create->cr_name, create->cr_namelen)))
729 return status;
730
731 status = nfsd4_decode_fattr(argp, create->cr_bmval, &create->cr_iattr,
732 &create->cr_acl, &create->cr_label,
733 &create->cr_umask);
734 if (status)
735 goto out;
736
737 DECODE_TAIL;
738}
739
740static inline __be32
741nfsd4_decode_delegreturn(struct nfsd4_compoundargs *argp, struct nfsd4_delegreturn *dr)
742{
743 return nfsd4_decode_stateid(argp, &dr->dr_stateid);
744}
745
746static inline __be32
747nfsd4_decode_getattr(struct nfsd4_compoundargs *argp, struct nfsd4_getattr *getattr)
748{
749 return nfsd4_decode_bitmap(argp, getattr->ga_bmval);
750}
751
752static __be32
753nfsd4_decode_link(struct nfsd4_compoundargs *argp, struct nfsd4_link *link)
754{
755 DECODE_HEAD;
756
757 READ_BUF(4);
758 link->li_namelen = be32_to_cpup(p++);
759 READ_BUF(link->li_namelen);
760 SAVEMEM(link->li_name, link->li_namelen);
761 if ((status = check_filename(link->li_name, link->li_namelen)))
762 return status;
763
764 DECODE_TAIL;
765}
766
767static __be32
768nfsd4_decode_lock(struct nfsd4_compoundargs *argp, struct nfsd4_lock *lock)
769{
770 DECODE_HEAD;
771
772
773
774
775 READ_BUF(28);
776 lock->lk_type = be32_to_cpup(p++);
777 if ((lock->lk_type < NFS4_READ_LT) || (lock->lk_type > NFS4_WRITEW_LT))
778 goto xdr_error;
779 lock->lk_reclaim = be32_to_cpup(p++);
780 p = xdr_decode_hyper(p, &lock->lk_offset);
781 p = xdr_decode_hyper(p, &lock->lk_length);
782 lock->lk_is_new = be32_to_cpup(p++);
783
784 if (lock->lk_is_new) {
785 READ_BUF(4);
786 lock->lk_new_open_seqid = be32_to_cpup(p++);
787 status = nfsd4_decode_stateid(argp, &lock->lk_new_open_stateid);
788 if (status)
789 return status;
790 READ_BUF(8 + sizeof(clientid_t));
791 lock->lk_new_lock_seqid = be32_to_cpup(p++);
792 COPYMEM(&lock->lk_new_clientid, sizeof(clientid_t));
793 lock->lk_new_owner.len = be32_to_cpup(p++);
794 READ_BUF(lock->lk_new_owner.len);
795 READMEM(lock->lk_new_owner.data, lock->lk_new_owner.len);
796 } else {
797 status = nfsd4_decode_stateid(argp, &lock->lk_old_lock_stateid);
798 if (status)
799 return status;
800 READ_BUF(4);
801 lock->lk_old_lock_seqid = be32_to_cpup(p++);
802 }
803
804 DECODE_TAIL;
805}
806
807static __be32
808nfsd4_decode_lockt(struct nfsd4_compoundargs *argp, struct nfsd4_lockt *lockt)
809{
810 DECODE_HEAD;
811
812 READ_BUF(32);
813 lockt->lt_type = be32_to_cpup(p++);
814 if((lockt->lt_type < NFS4_READ_LT) || (lockt->lt_type > NFS4_WRITEW_LT))
815 goto xdr_error;
816 p = xdr_decode_hyper(p, &lockt->lt_offset);
817 p = xdr_decode_hyper(p, &lockt->lt_length);
818 COPYMEM(&lockt->lt_clientid, 8);
819 lockt->lt_owner.len = be32_to_cpup(p++);
820 READ_BUF(lockt->lt_owner.len);
821 READMEM(lockt->lt_owner.data, lockt->lt_owner.len);
822
823 DECODE_TAIL;
824}
825
826static __be32
827nfsd4_decode_locku(struct nfsd4_compoundargs *argp, struct nfsd4_locku *locku)
828{
829 DECODE_HEAD;
830
831 READ_BUF(8);
832 locku->lu_type = be32_to_cpup(p++);
833 if ((locku->lu_type < NFS4_READ_LT) || (locku->lu_type > NFS4_WRITEW_LT))
834 goto xdr_error;
835 locku->lu_seqid = be32_to_cpup(p++);
836 status = nfsd4_decode_stateid(argp, &locku->lu_stateid);
837 if (status)
838 return status;
839 READ_BUF(16);
840 p = xdr_decode_hyper(p, &locku->lu_offset);
841 p = xdr_decode_hyper(p, &locku->lu_length);
842
843 DECODE_TAIL;
844}
845
846static __be32
847nfsd4_decode_lookup(struct nfsd4_compoundargs *argp, struct nfsd4_lookup *lookup)
848{
849 DECODE_HEAD;
850
851 READ_BUF(4);
852 lookup->lo_len = be32_to_cpup(p++);
853 READ_BUF(lookup->lo_len);
854 SAVEMEM(lookup->lo_name, lookup->lo_len);
855 if ((status = check_filename(lookup->lo_name, lookup->lo_len)))
856 return status;
857
858 DECODE_TAIL;
859}
860
861static __be32 nfsd4_decode_share_access(struct nfsd4_compoundargs *argp, u32 *share_access, u32 *deleg_want, u32 *deleg_when)
862{
863 __be32 *p;
864 u32 w;
865
866 READ_BUF(4);
867 w = be32_to_cpup(p++);
868 *share_access = w & NFS4_SHARE_ACCESS_MASK;
869 *deleg_want = w & NFS4_SHARE_WANT_MASK;
870 if (deleg_when)
871 *deleg_when = w & NFS4_SHARE_WHEN_MASK;
872
873 switch (w & NFS4_SHARE_ACCESS_MASK) {
874 case NFS4_SHARE_ACCESS_READ:
875 case NFS4_SHARE_ACCESS_WRITE:
876 case NFS4_SHARE_ACCESS_BOTH:
877 break;
878 default:
879 return nfserr_bad_xdr;
880 }
881 w &= ~NFS4_SHARE_ACCESS_MASK;
882 if (!w)
883 return nfs_ok;
884 if (!argp->minorversion)
885 return nfserr_bad_xdr;
886 switch (w & NFS4_SHARE_WANT_MASK) {
887 case NFS4_SHARE_WANT_NO_PREFERENCE:
888 case NFS4_SHARE_WANT_READ_DELEG:
889 case NFS4_SHARE_WANT_WRITE_DELEG:
890 case NFS4_SHARE_WANT_ANY_DELEG:
891 case NFS4_SHARE_WANT_NO_DELEG:
892 case NFS4_SHARE_WANT_CANCEL:
893 break;
894 default:
895 return nfserr_bad_xdr;
896 }
897 w &= ~NFS4_SHARE_WANT_MASK;
898 if (!w)
899 return nfs_ok;
900
901 if (!deleg_when)
902 return nfserr_inval;
903 switch (w) {
904 case NFS4_SHARE_SIGNAL_DELEG_WHEN_RESRC_AVAIL:
905 case NFS4_SHARE_PUSH_DELEG_WHEN_UNCONTENDED:
906 case (NFS4_SHARE_SIGNAL_DELEG_WHEN_RESRC_AVAIL |
907 NFS4_SHARE_PUSH_DELEG_WHEN_UNCONTENDED):
908 return nfs_ok;
909 }
910xdr_error:
911 return nfserr_bad_xdr;
912}
913
914static __be32 nfsd4_decode_share_deny(struct nfsd4_compoundargs *argp, u32 *x)
915{
916 __be32 *p;
917
918 READ_BUF(4);
919 *x = be32_to_cpup(p++);
920
921 if (*x & ~NFS4_SHARE_DENY_BOTH)
922 return nfserr_bad_xdr;
923 return nfs_ok;
924xdr_error:
925 return nfserr_bad_xdr;
926}
927
928static __be32 nfsd4_decode_opaque(struct nfsd4_compoundargs *argp, struct xdr_netobj *o)
929{
930 __be32 *p;
931
932 READ_BUF(4);
933 o->len = be32_to_cpup(p++);
934
935 if (o->len == 0 || o->len > NFS4_OPAQUE_LIMIT)
936 return nfserr_bad_xdr;
937
938 READ_BUF(o->len);
939 SAVEMEM(o->data, o->len);
940 return nfs_ok;
941xdr_error:
942 return nfserr_bad_xdr;
943}
944
945static __be32
946nfsd4_decode_open(struct nfsd4_compoundargs *argp, struct nfsd4_open *open)
947{
948 DECODE_HEAD;
949 u32 dummy;
950
951 memset(open->op_bmval, 0, sizeof(open->op_bmval));
952 open->op_iattr.ia_valid = 0;
953 open->op_openowner = NULL;
954
955 open->op_xdr_error = 0;
956
957 READ_BUF(4);
958 open->op_seqid = be32_to_cpup(p++);
959
960 status = nfsd4_decode_share_access(argp, &open->op_share_access,
961 &open->op_deleg_want, &dummy);
962 if (status)
963 goto xdr_error;
964 status = nfsd4_decode_share_deny(argp, &open->op_share_deny);
965 if (status)
966 goto xdr_error;
967 READ_BUF(sizeof(clientid_t));
968 COPYMEM(&open->op_clientid, sizeof(clientid_t));
969 status = nfsd4_decode_opaque(argp, &open->op_owner);
970 if (status)
971 goto xdr_error;
972 READ_BUF(4);
973 open->op_create = be32_to_cpup(p++);
974 switch (open->op_create) {
975 case NFS4_OPEN_NOCREATE:
976 break;
977 case NFS4_OPEN_CREATE:
978 READ_BUF(4);
979 open->op_createmode = be32_to_cpup(p++);
980 switch (open->op_createmode) {
981 case NFS4_CREATE_UNCHECKED:
982 case NFS4_CREATE_GUARDED:
983 status = nfsd4_decode_fattr(argp, open->op_bmval,
984 &open->op_iattr, &open->op_acl, &open->op_label,
985 &open->op_umask);
986 if (status)
987 goto out;
988 break;
989 case NFS4_CREATE_EXCLUSIVE:
990 READ_BUF(NFS4_VERIFIER_SIZE);
991 COPYMEM(open->op_verf.data, NFS4_VERIFIER_SIZE);
992 break;
993 case NFS4_CREATE_EXCLUSIVE4_1:
994 if (argp->minorversion < 1)
995 goto xdr_error;
996 READ_BUF(NFS4_VERIFIER_SIZE);
997 COPYMEM(open->op_verf.data, NFS4_VERIFIER_SIZE);
998 status = nfsd4_decode_fattr(argp, open->op_bmval,
999 &open->op_iattr, &open->op_acl, &open->op_label,
1000 &open->op_umask);
1001 if (status)
1002 goto out;
1003 break;
1004 default:
1005 goto xdr_error;
1006 }
1007 break;
1008 default:
1009 goto xdr_error;
1010 }
1011
1012
1013 READ_BUF(4);
1014 open->op_claim_type = be32_to_cpup(p++);
1015 switch (open->op_claim_type) {
1016 case NFS4_OPEN_CLAIM_NULL:
1017 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
1018 READ_BUF(4);
1019 open->op_fname.len = be32_to_cpup(p++);
1020 READ_BUF(open->op_fname.len);
1021 SAVEMEM(open->op_fname.data, open->op_fname.len);
1022 if ((status = check_filename(open->op_fname.data, open->op_fname.len)))
1023 return status;
1024 break;
1025 case NFS4_OPEN_CLAIM_PREVIOUS:
1026 READ_BUF(4);
1027 open->op_delegate_type = be32_to_cpup(p++);
1028 break;
1029 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1030 status = nfsd4_decode_stateid(argp, &open->op_delegate_stateid);
1031 if (status)
1032 return status;
1033 READ_BUF(4);
1034 open->op_fname.len = be32_to_cpup(p++);
1035 READ_BUF(open->op_fname.len);
1036 SAVEMEM(open->op_fname.data, open->op_fname.len);
1037 if ((status = check_filename(open->op_fname.data, open->op_fname.len)))
1038 return status;
1039 break;
1040 case NFS4_OPEN_CLAIM_FH:
1041 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
1042 if (argp->minorversion < 1)
1043 goto xdr_error;
1044
1045 break;
1046 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1047 if (argp->minorversion < 1)
1048 goto xdr_error;
1049 status = nfsd4_decode_stateid(argp, &open->op_delegate_stateid);
1050 if (status)
1051 return status;
1052 break;
1053 default:
1054 goto xdr_error;
1055 }
1056
1057 DECODE_TAIL;
1058}
1059
1060static __be32
1061nfsd4_decode_open_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_open_confirm *open_conf)
1062{
1063 DECODE_HEAD;
1064
1065 if (argp->minorversion >= 1)
1066 return nfserr_notsupp;
1067
1068 status = nfsd4_decode_stateid(argp, &open_conf->oc_req_stateid);
1069 if (status)
1070 return status;
1071 READ_BUF(4);
1072 open_conf->oc_seqid = be32_to_cpup(p++);
1073
1074 DECODE_TAIL;
1075}
1076
1077static __be32
1078nfsd4_decode_open_downgrade(struct nfsd4_compoundargs *argp, struct nfsd4_open_downgrade *open_down)
1079{
1080 DECODE_HEAD;
1081
1082 status = nfsd4_decode_stateid(argp, &open_down->od_stateid);
1083 if (status)
1084 return status;
1085 READ_BUF(4);
1086 open_down->od_seqid = be32_to_cpup(p++);
1087 status = nfsd4_decode_share_access(argp, &open_down->od_share_access,
1088 &open_down->od_deleg_want, NULL);
1089 if (status)
1090 return status;
1091 status = nfsd4_decode_share_deny(argp, &open_down->od_share_deny);
1092 if (status)
1093 return status;
1094 DECODE_TAIL;
1095}
1096
1097static __be32
1098nfsd4_decode_putfh(struct nfsd4_compoundargs *argp, struct nfsd4_putfh *putfh)
1099{
1100 DECODE_HEAD;
1101
1102 READ_BUF(4);
1103 putfh->pf_fhlen = be32_to_cpup(p++);
1104 if (putfh->pf_fhlen > NFS4_FHSIZE)
1105 goto xdr_error;
1106 READ_BUF(putfh->pf_fhlen);
1107 SAVEMEM(putfh->pf_fhval, putfh->pf_fhlen);
1108
1109 DECODE_TAIL;
1110}
1111
1112static __be32
1113nfsd4_decode_putpubfh(struct nfsd4_compoundargs *argp, void *p)
1114{
1115 if (argp->minorversion == 0)
1116 return nfs_ok;
1117 return nfserr_notsupp;
1118}
1119
1120static __be32
1121nfsd4_decode_read(struct nfsd4_compoundargs *argp, struct nfsd4_read *read)
1122{
1123 DECODE_HEAD;
1124
1125 status = nfsd4_decode_stateid(argp, &read->rd_stateid);
1126 if (status)
1127 return status;
1128 READ_BUF(12);
1129 p = xdr_decode_hyper(p, &read->rd_offset);
1130 read->rd_length = be32_to_cpup(p++);
1131
1132 DECODE_TAIL;
1133}
1134
1135static __be32
1136nfsd4_decode_readdir(struct nfsd4_compoundargs *argp, struct nfsd4_readdir *readdir)
1137{
1138 DECODE_HEAD;
1139
1140 READ_BUF(24);
1141 p = xdr_decode_hyper(p, &readdir->rd_cookie);
1142 COPYMEM(readdir->rd_verf.data, sizeof(readdir->rd_verf.data));
1143 readdir->rd_dircount = be32_to_cpup(p++);
1144 readdir->rd_maxcount = be32_to_cpup(p++);
1145 if ((status = nfsd4_decode_bitmap(argp, readdir->rd_bmval)))
1146 goto out;
1147
1148 DECODE_TAIL;
1149}
1150
1151static __be32
1152nfsd4_decode_remove(struct nfsd4_compoundargs *argp, struct nfsd4_remove *remove)
1153{
1154 DECODE_HEAD;
1155
1156 READ_BUF(4);
1157 remove->rm_namelen = be32_to_cpup(p++);
1158 READ_BUF(remove->rm_namelen);
1159 SAVEMEM(remove->rm_name, remove->rm_namelen);
1160 if ((status = check_filename(remove->rm_name, remove->rm_namelen)))
1161 return status;
1162
1163 DECODE_TAIL;
1164}
1165
1166static __be32
1167nfsd4_decode_rename(struct nfsd4_compoundargs *argp, struct nfsd4_rename *rename)
1168{
1169 DECODE_HEAD;
1170
1171 READ_BUF(4);
1172 rename->rn_snamelen = be32_to_cpup(p++);
1173 READ_BUF(rename->rn_snamelen);
1174 SAVEMEM(rename->rn_sname, rename->rn_snamelen);
1175 READ_BUF(4);
1176 rename->rn_tnamelen = be32_to_cpup(p++);
1177 READ_BUF(rename->rn_tnamelen);
1178 SAVEMEM(rename->rn_tname, rename->rn_tnamelen);
1179 if ((status = check_filename(rename->rn_sname, rename->rn_snamelen)))
1180 return status;
1181 if ((status = check_filename(rename->rn_tname, rename->rn_tnamelen)))
1182 return status;
1183
1184 DECODE_TAIL;
1185}
1186
1187static __be32
1188nfsd4_decode_renew(struct nfsd4_compoundargs *argp, clientid_t *clientid)
1189{
1190 DECODE_HEAD;
1191
1192 if (argp->minorversion >= 1)
1193 return nfserr_notsupp;
1194
1195 READ_BUF(sizeof(clientid_t));
1196 COPYMEM(clientid, sizeof(clientid_t));
1197
1198 DECODE_TAIL;
1199}
1200
1201static __be32
1202nfsd4_decode_secinfo(struct nfsd4_compoundargs *argp,
1203 struct nfsd4_secinfo *secinfo)
1204{
1205 DECODE_HEAD;
1206
1207 READ_BUF(4);
1208 secinfo->si_namelen = be32_to_cpup(p++);
1209 READ_BUF(secinfo->si_namelen);
1210 SAVEMEM(secinfo->si_name, secinfo->si_namelen);
1211 status = check_filename(secinfo->si_name, secinfo->si_namelen);
1212 if (status)
1213 return status;
1214 DECODE_TAIL;
1215}
1216
1217static __be32
1218nfsd4_decode_secinfo_no_name(struct nfsd4_compoundargs *argp,
1219 struct nfsd4_secinfo_no_name *sin)
1220{
1221 DECODE_HEAD;
1222
1223 READ_BUF(4);
1224 sin->sin_style = be32_to_cpup(p++);
1225 DECODE_TAIL;
1226}
1227
1228static __be32
1229nfsd4_decode_setattr(struct nfsd4_compoundargs *argp, struct nfsd4_setattr *setattr)
1230{
1231 __be32 status;
1232
1233 status = nfsd4_decode_stateid(argp, &setattr->sa_stateid);
1234 if (status)
1235 return status;
1236 return nfsd4_decode_fattr(argp, setattr->sa_bmval, &setattr->sa_iattr,
1237 &setattr->sa_acl, &setattr->sa_label, NULL);
1238}
1239
1240static __be32
1241nfsd4_decode_setclientid(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid *setclientid)
1242{
1243 DECODE_HEAD;
1244
1245 if (argp->minorversion >= 1)
1246 return nfserr_notsupp;
1247
1248 READ_BUF(NFS4_VERIFIER_SIZE);
1249 COPYMEM(setclientid->se_verf.data, NFS4_VERIFIER_SIZE);
1250
1251 status = nfsd4_decode_opaque(argp, &setclientid->se_name);
1252 if (status)
1253 return nfserr_bad_xdr;
1254 READ_BUF(8);
1255 setclientid->se_callback_prog = be32_to_cpup(p++);
1256 setclientid->se_callback_netid_len = be32_to_cpup(p++);
1257 READ_BUF(setclientid->se_callback_netid_len);
1258 SAVEMEM(setclientid->se_callback_netid_val, setclientid->se_callback_netid_len);
1259 READ_BUF(4);
1260 setclientid->se_callback_addr_len = be32_to_cpup(p++);
1261
1262 READ_BUF(setclientid->se_callback_addr_len);
1263 SAVEMEM(setclientid->se_callback_addr_val, setclientid->se_callback_addr_len);
1264 READ_BUF(4);
1265 setclientid->se_callback_ident = be32_to_cpup(p++);
1266
1267 DECODE_TAIL;
1268}
1269
1270static __be32
1271nfsd4_decode_setclientid_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid_confirm *scd_c)
1272{
1273 DECODE_HEAD;
1274
1275 if (argp->minorversion >= 1)
1276 return nfserr_notsupp;
1277
1278 READ_BUF(8 + NFS4_VERIFIER_SIZE);
1279 COPYMEM(&scd_c->sc_clientid, 8);
1280 COPYMEM(&scd_c->sc_confirm, NFS4_VERIFIER_SIZE);
1281
1282 DECODE_TAIL;
1283}
1284
1285
1286static __be32
1287nfsd4_decode_verify(struct nfsd4_compoundargs *argp, struct nfsd4_verify *verify)
1288{
1289 DECODE_HEAD;
1290
1291 if ((status = nfsd4_decode_bitmap(argp, verify->ve_bmval)))
1292 goto out;
1293
1294
1295
1296
1297 READ_BUF(4);
1298 verify->ve_attrlen = be32_to_cpup(p++);
1299 READ_BUF(verify->ve_attrlen);
1300 SAVEMEM(verify->ve_attrval, verify->ve_attrlen);
1301
1302 DECODE_TAIL;
1303}
1304
1305static __be32
1306nfsd4_decode_write(struct nfsd4_compoundargs *argp, struct nfsd4_write *write)
1307{
1308 DECODE_HEAD;
1309
1310 status = nfsd4_decode_stateid(argp, &write->wr_stateid);
1311 if (status)
1312 return status;
1313 READ_BUF(16);
1314 p = xdr_decode_hyper(p, &write->wr_offset);
1315 write->wr_stable_how = be32_to_cpup(p++);
1316 if (write->wr_stable_how > NFS_FILE_SYNC)
1317 goto xdr_error;
1318 write->wr_buflen = be32_to_cpup(p++);
1319
1320 status = svcxdr_construct_vector(argp, &write->wr_head,
1321 &write->wr_pagelist, write->wr_buflen);
1322 if (status)
1323 return status;
1324
1325 DECODE_TAIL;
1326}
1327
1328static __be32
1329nfsd4_decode_release_lockowner(struct nfsd4_compoundargs *argp, struct nfsd4_release_lockowner *rlockowner)
1330{
1331 DECODE_HEAD;
1332
1333 if (argp->minorversion >= 1)
1334 return nfserr_notsupp;
1335
1336 READ_BUF(12);
1337 COPYMEM(&rlockowner->rl_clientid, sizeof(clientid_t));
1338 rlockowner->rl_owner.len = be32_to_cpup(p++);
1339 READ_BUF(rlockowner->rl_owner.len);
1340 READMEM(rlockowner->rl_owner.data, rlockowner->rl_owner.len);
1341
1342 if (argp->minorversion && !zero_clientid(&rlockowner->rl_clientid))
1343 return nfserr_inval;
1344 DECODE_TAIL;
1345}
1346
1347static __be32
1348nfsd4_decode_exchange_id(struct nfsd4_compoundargs *argp,
1349 struct nfsd4_exchange_id *exid)
1350{
1351 int dummy, tmp;
1352 DECODE_HEAD;
1353
1354 READ_BUF(NFS4_VERIFIER_SIZE);
1355 COPYMEM(exid->verifier.data, NFS4_VERIFIER_SIZE);
1356
1357 status = nfsd4_decode_opaque(argp, &exid->clname);
1358 if (status)
1359 return nfserr_bad_xdr;
1360
1361 READ_BUF(4);
1362 exid->flags = be32_to_cpup(p++);
1363
1364
1365 READ_BUF(4);
1366 exid->spa_how = be32_to_cpup(p++);
1367 switch (exid->spa_how) {
1368 case SP4_NONE:
1369 break;
1370 case SP4_MACH_CRED:
1371
1372 status = nfsd4_decode_bitmap(argp,
1373 exid->spo_must_enforce);
1374 if (status)
1375 goto out;
1376
1377 status = nfsd4_decode_bitmap(argp, exid->spo_must_allow);
1378 if (status)
1379 goto out;
1380 break;
1381 case SP4_SSV:
1382
1383 READ_BUF(4);
1384 dummy = be32_to_cpup(p++);
1385 READ_BUF(dummy * 4);
1386 p += dummy;
1387
1388 READ_BUF(4);
1389 dummy = be32_to_cpup(p++);
1390 READ_BUF(dummy * 4);
1391 p += dummy;
1392
1393
1394 READ_BUF(4);
1395 tmp = be32_to_cpup(p++);
1396 while (tmp--) {
1397 READ_BUF(4);
1398 dummy = be32_to_cpup(p++);
1399 READ_BUF(dummy);
1400 p += XDR_QUADLEN(dummy);
1401 }
1402
1403
1404 READ_BUF(4);
1405 tmp = be32_to_cpup(p++);
1406 while (tmp--) {
1407 READ_BUF(4);
1408 dummy = be32_to_cpup(p++);
1409 READ_BUF(dummy);
1410 p += XDR_QUADLEN(dummy);
1411 }
1412
1413
1414 READ_BUF(8);
1415 break;
1416 default:
1417 goto xdr_error;
1418 }
1419
1420 READ_BUF(4);
1421 dummy = be32_to_cpup(p++);
1422
1423 if (dummy > 1)
1424 goto xdr_error;
1425
1426 if (dummy == 1) {
1427 status = nfsd4_decode_opaque(argp, &exid->nii_domain);
1428 if (status)
1429 goto xdr_error;
1430
1431
1432 status = nfsd4_decode_opaque(argp, &exid->nii_name);
1433 if (status)
1434 goto xdr_error;
1435
1436
1437 status = nfsd4_decode_time(argp, &exid->nii_time);
1438 if (status)
1439 goto xdr_error;
1440 }
1441 DECODE_TAIL;
1442}
1443
1444static __be32
1445nfsd4_decode_create_session(struct nfsd4_compoundargs *argp,
1446 struct nfsd4_create_session *sess)
1447{
1448 DECODE_HEAD;
1449
1450 READ_BUF(16);
1451 COPYMEM(&sess->clientid, 8);
1452 sess->seqid = be32_to_cpup(p++);
1453 sess->flags = be32_to_cpup(p++);
1454
1455
1456 READ_BUF(28);
1457 p++;
1458 sess->fore_channel.maxreq_sz = be32_to_cpup(p++);
1459 sess->fore_channel.maxresp_sz = be32_to_cpup(p++);
1460 sess->fore_channel.maxresp_cached = be32_to_cpup(p++);
1461 sess->fore_channel.maxops = be32_to_cpup(p++);
1462 sess->fore_channel.maxreqs = be32_to_cpup(p++);
1463 sess->fore_channel.nr_rdma_attrs = be32_to_cpup(p++);
1464 if (sess->fore_channel.nr_rdma_attrs == 1) {
1465 READ_BUF(4);
1466 sess->fore_channel.rdma_attrs = be32_to_cpup(p++);
1467 } else if (sess->fore_channel.nr_rdma_attrs > 1) {
1468 dprintk("Too many fore channel attr bitmaps!\n");
1469 goto xdr_error;
1470 }
1471
1472
1473 READ_BUF(28);
1474 p++;
1475 sess->back_channel.maxreq_sz = be32_to_cpup(p++);
1476 sess->back_channel.maxresp_sz = be32_to_cpup(p++);
1477 sess->back_channel.maxresp_cached = be32_to_cpup(p++);
1478 sess->back_channel.maxops = be32_to_cpup(p++);
1479 sess->back_channel.maxreqs = be32_to_cpup(p++);
1480 sess->back_channel.nr_rdma_attrs = be32_to_cpup(p++);
1481 if (sess->back_channel.nr_rdma_attrs == 1) {
1482 READ_BUF(4);
1483 sess->back_channel.rdma_attrs = be32_to_cpup(p++);
1484 } else if (sess->back_channel.nr_rdma_attrs > 1) {
1485 dprintk("Too many back channel attr bitmaps!\n");
1486 goto xdr_error;
1487 }
1488
1489 READ_BUF(4);
1490 sess->callback_prog = be32_to_cpup(p++);
1491 nfsd4_decode_cb_sec(argp, &sess->cb_sec);
1492 DECODE_TAIL;
1493}
1494
1495static __be32
1496nfsd4_decode_destroy_session(struct nfsd4_compoundargs *argp,
1497 struct nfsd4_destroy_session *destroy_session)
1498{
1499 DECODE_HEAD;
1500 READ_BUF(NFS4_MAX_SESSIONID_LEN);
1501 COPYMEM(destroy_session->sessionid.data, NFS4_MAX_SESSIONID_LEN);
1502
1503 DECODE_TAIL;
1504}
1505
1506static __be32
1507nfsd4_decode_free_stateid(struct nfsd4_compoundargs *argp,
1508 struct nfsd4_free_stateid *free_stateid)
1509{
1510 DECODE_HEAD;
1511
1512 READ_BUF(sizeof(stateid_t));
1513 free_stateid->fr_stateid.si_generation = be32_to_cpup(p++);
1514 COPYMEM(&free_stateid->fr_stateid.si_opaque, sizeof(stateid_opaque_t));
1515
1516 DECODE_TAIL;
1517}
1518
1519static __be32
1520nfsd4_decode_sequence(struct nfsd4_compoundargs *argp,
1521 struct nfsd4_sequence *seq)
1522{
1523 DECODE_HEAD;
1524
1525 READ_BUF(NFS4_MAX_SESSIONID_LEN + 16);
1526 COPYMEM(seq->sessionid.data, NFS4_MAX_SESSIONID_LEN);
1527 seq->seqid = be32_to_cpup(p++);
1528 seq->slotid = be32_to_cpup(p++);
1529 seq->maxslots = be32_to_cpup(p++);
1530 seq->cachethis = be32_to_cpup(p++);
1531
1532 DECODE_TAIL;
1533}
1534
1535static __be32
1536nfsd4_decode_test_stateid(struct nfsd4_compoundargs *argp, struct nfsd4_test_stateid *test_stateid)
1537{
1538 int i;
1539 __be32 *p, status;
1540 struct nfsd4_test_stateid_id *stateid;
1541
1542 READ_BUF(4);
1543 test_stateid->ts_num_ids = ntohl(*p++);
1544
1545 INIT_LIST_HEAD(&test_stateid->ts_stateid_list);
1546
1547 for (i = 0; i < test_stateid->ts_num_ids; i++) {
1548 stateid = svcxdr_tmpalloc(argp, sizeof(*stateid));
1549 if (!stateid) {
1550 status = nfserrno(-ENOMEM);
1551 goto out;
1552 }
1553
1554 INIT_LIST_HEAD(&stateid->ts_id_list);
1555 list_add_tail(&stateid->ts_id_list, &test_stateid->ts_stateid_list);
1556
1557 status = nfsd4_decode_stateid(argp, &stateid->ts_id_stateid);
1558 if (status)
1559 goto out;
1560 }
1561
1562 status = 0;
1563out:
1564 return status;
1565xdr_error:
1566 dprintk("NFSD: xdr error (%s:%d)\n", __FILE__, __LINE__);
1567 status = nfserr_bad_xdr;
1568 goto out;
1569}
1570
1571static __be32 nfsd4_decode_destroy_clientid(struct nfsd4_compoundargs *argp, struct nfsd4_destroy_clientid *dc)
1572{
1573 DECODE_HEAD;
1574
1575 READ_BUF(8);
1576 COPYMEM(&dc->clientid, 8);
1577
1578 DECODE_TAIL;
1579}
1580
1581static __be32 nfsd4_decode_reclaim_complete(struct nfsd4_compoundargs *argp, struct nfsd4_reclaim_complete *rc)
1582{
1583 DECODE_HEAD;
1584
1585 READ_BUF(4);
1586 rc->rca_one_fs = be32_to_cpup(p++);
1587
1588 DECODE_TAIL;
1589}
1590
1591#ifdef CONFIG_NFSD_PNFS
1592static __be32
1593nfsd4_decode_getdeviceinfo(struct nfsd4_compoundargs *argp,
1594 struct nfsd4_getdeviceinfo *gdev)
1595{
1596 DECODE_HEAD;
1597 u32 num, i;
1598
1599 READ_BUF(sizeof(struct nfsd4_deviceid) + 3 * 4);
1600 COPYMEM(&gdev->gd_devid, sizeof(struct nfsd4_deviceid));
1601 gdev->gd_layout_type = be32_to_cpup(p++);
1602 gdev->gd_maxcount = be32_to_cpup(p++);
1603 num = be32_to_cpup(p++);
1604 if (num) {
1605 if (num > 1000)
1606 goto xdr_error;
1607 READ_BUF(4 * num);
1608 gdev->gd_notify_types = be32_to_cpup(p++);
1609 for (i = 1; i < num; i++) {
1610 if (be32_to_cpup(p++)) {
1611 status = nfserr_inval;
1612 goto out;
1613 }
1614 }
1615 }
1616 DECODE_TAIL;
1617}
1618
1619static __be32
1620nfsd4_decode_layoutget(struct nfsd4_compoundargs *argp,
1621 struct nfsd4_layoutget *lgp)
1622{
1623 DECODE_HEAD;
1624
1625 READ_BUF(36);
1626 lgp->lg_signal = be32_to_cpup(p++);
1627 lgp->lg_layout_type = be32_to_cpup(p++);
1628 lgp->lg_seg.iomode = be32_to_cpup(p++);
1629 p = xdr_decode_hyper(p, &lgp->lg_seg.offset);
1630 p = xdr_decode_hyper(p, &lgp->lg_seg.length);
1631 p = xdr_decode_hyper(p, &lgp->lg_minlength);
1632
1633 status = nfsd4_decode_stateid(argp, &lgp->lg_sid);
1634 if (status)
1635 return status;
1636
1637 READ_BUF(4);
1638 lgp->lg_maxcount = be32_to_cpup(p++);
1639
1640 DECODE_TAIL;
1641}
1642
1643static __be32
1644nfsd4_decode_layoutcommit(struct nfsd4_compoundargs *argp,
1645 struct nfsd4_layoutcommit *lcp)
1646{
1647 DECODE_HEAD;
1648 u32 timechange;
1649
1650 READ_BUF(20);
1651 p = xdr_decode_hyper(p, &lcp->lc_seg.offset);
1652 p = xdr_decode_hyper(p, &lcp->lc_seg.length);
1653 lcp->lc_reclaim = be32_to_cpup(p++);
1654
1655 status = nfsd4_decode_stateid(argp, &lcp->lc_sid);
1656 if (status)
1657 return status;
1658
1659 READ_BUF(4);
1660 lcp->lc_newoffset = be32_to_cpup(p++);
1661 if (lcp->lc_newoffset) {
1662 READ_BUF(8);
1663 p = xdr_decode_hyper(p, &lcp->lc_last_wr);
1664 } else
1665 lcp->lc_last_wr = 0;
1666 READ_BUF(4);
1667 timechange = be32_to_cpup(p++);
1668 if (timechange) {
1669 status = nfsd4_decode_time(argp, &lcp->lc_mtime);
1670 if (status)
1671 return status;
1672 } else {
1673 lcp->lc_mtime.tv_nsec = UTIME_NOW;
1674 }
1675 READ_BUF(8);
1676 lcp->lc_layout_type = be32_to_cpup(p++);
1677
1678
1679
1680
1681
1682 lcp->lc_up_len = be32_to_cpup(p++);
1683 if (lcp->lc_up_len > 0) {
1684 READ_BUF(lcp->lc_up_len);
1685 READMEM(lcp->lc_up_layout, lcp->lc_up_len);
1686 }
1687
1688 DECODE_TAIL;
1689}
1690
1691static __be32
1692nfsd4_decode_layoutreturn(struct nfsd4_compoundargs *argp,
1693 struct nfsd4_layoutreturn *lrp)
1694{
1695 DECODE_HEAD;
1696
1697 READ_BUF(16);
1698 lrp->lr_reclaim = be32_to_cpup(p++);
1699 lrp->lr_layout_type = be32_to_cpup(p++);
1700 lrp->lr_seg.iomode = be32_to_cpup(p++);
1701 lrp->lr_return_type = be32_to_cpup(p++);
1702 if (lrp->lr_return_type == RETURN_FILE) {
1703 READ_BUF(16);
1704 p = xdr_decode_hyper(p, &lrp->lr_seg.offset);
1705 p = xdr_decode_hyper(p, &lrp->lr_seg.length);
1706
1707 status = nfsd4_decode_stateid(argp, &lrp->lr_sid);
1708 if (status)
1709 return status;
1710
1711 READ_BUF(4);
1712 lrp->lrf_body_len = be32_to_cpup(p++);
1713 if (lrp->lrf_body_len > 0) {
1714 READ_BUF(lrp->lrf_body_len);
1715 READMEM(lrp->lrf_body, lrp->lrf_body_len);
1716 }
1717 } else {
1718 lrp->lr_seg.offset = 0;
1719 lrp->lr_seg.length = NFS4_MAX_UINT64;
1720 }
1721
1722 DECODE_TAIL;
1723}
1724#endif
1725
1726static __be32
1727nfsd4_decode_fallocate(struct nfsd4_compoundargs *argp,
1728 struct nfsd4_fallocate *fallocate)
1729{
1730 DECODE_HEAD;
1731
1732 status = nfsd4_decode_stateid(argp, &fallocate->falloc_stateid);
1733 if (status)
1734 return status;
1735
1736 READ_BUF(16);
1737 p = xdr_decode_hyper(p, &fallocate->falloc_offset);
1738 xdr_decode_hyper(p, &fallocate->falloc_length);
1739
1740 DECODE_TAIL;
1741}
1742
1743static __be32
1744nfsd4_decode_clone(struct nfsd4_compoundargs *argp, struct nfsd4_clone *clone)
1745{
1746 DECODE_HEAD;
1747
1748 status = nfsd4_decode_stateid(argp, &clone->cl_src_stateid);
1749 if (status)
1750 return status;
1751 status = nfsd4_decode_stateid(argp, &clone->cl_dst_stateid);
1752 if (status)
1753 return status;
1754
1755 READ_BUF(8 + 8 + 8);
1756 p = xdr_decode_hyper(p, &clone->cl_src_pos);
1757 p = xdr_decode_hyper(p, &clone->cl_dst_pos);
1758 p = xdr_decode_hyper(p, &clone->cl_count);
1759 DECODE_TAIL;
1760}
1761
1762static __be32 nfsd4_decode_nl4_server(struct nfsd4_compoundargs *argp,
1763 struct nl4_server *ns)
1764{
1765 DECODE_HEAD;
1766 struct nfs42_netaddr *naddr;
1767
1768 READ_BUF(4);
1769 ns->nl4_type = be32_to_cpup(p++);
1770
1771
1772 switch (ns->nl4_type) {
1773 case NL4_NETADDR:
1774 naddr = &ns->u.nl4_addr;
1775
1776 READ_BUF(4);
1777 naddr->netid_len = be32_to_cpup(p++);
1778 if (naddr->netid_len > RPCBIND_MAXNETIDLEN)
1779 goto xdr_error;
1780
1781 READ_BUF(naddr->netid_len + 4);
1782 COPYMEM(naddr->netid, naddr->netid_len);
1783
1784 naddr->addr_len = be32_to_cpup(p++);
1785 if (naddr->addr_len > RPCBIND_MAXUADDRLEN)
1786 goto xdr_error;
1787
1788 READ_BUF(naddr->addr_len);
1789 COPYMEM(naddr->addr, naddr->addr_len);
1790 break;
1791 default:
1792 goto xdr_error;
1793 }
1794 DECODE_TAIL;
1795}
1796
1797static __be32
1798nfsd4_decode_copy(struct nfsd4_compoundargs *argp, struct nfsd4_copy *copy)
1799{
1800 DECODE_HEAD;
1801 struct nl4_server *ns_dummy;
1802 int i, count;
1803
1804 status = nfsd4_decode_stateid(argp, ©->cp_src_stateid);
1805 if (status)
1806 return status;
1807 status = nfsd4_decode_stateid(argp, ©->cp_dst_stateid);
1808 if (status)
1809 return status;
1810
1811 READ_BUF(8 + 8 + 8 + 4 + 4 + 4);
1812 p = xdr_decode_hyper(p, ©->cp_src_pos);
1813 p = xdr_decode_hyper(p, ©->cp_dst_pos);
1814 p = xdr_decode_hyper(p, ©->cp_count);
1815 p++;
1816 copy->cp_synchronous = be32_to_cpup(p++);
1817
1818 count = be32_to_cpup(p++);
1819
1820 copy->cp_intra = false;
1821 if (count == 0) {
1822 copy->cp_intra = true;
1823 goto intra;
1824 }
1825
1826
1827 status = nfsd4_decode_nl4_server(argp, ©->cp_src);
1828 if (status)
1829 return status;
1830
1831 ns_dummy = kmalloc(sizeof(struct nl4_server), GFP_KERNEL);
1832 if (ns_dummy == NULL)
1833 return nfserrno(-ENOMEM);
1834 for (i = 0; i < count - 1; i++) {
1835 status = nfsd4_decode_nl4_server(argp, ns_dummy);
1836 if (status) {
1837 kfree(ns_dummy);
1838 return status;
1839 }
1840 }
1841 kfree(ns_dummy);
1842intra:
1843
1844 DECODE_TAIL;
1845}
1846
1847static __be32
1848nfsd4_decode_offload_status(struct nfsd4_compoundargs *argp,
1849 struct nfsd4_offload_status *os)
1850{
1851 return nfsd4_decode_stateid(argp, &os->stateid);
1852}
1853
1854static __be32
1855nfsd4_decode_copy_notify(struct nfsd4_compoundargs *argp,
1856 struct nfsd4_copy_notify *cn)
1857{
1858 int status;
1859
1860 status = nfsd4_decode_stateid(argp, &cn->cpn_src_stateid);
1861 if (status)
1862 return status;
1863 return nfsd4_decode_nl4_server(argp, &cn->cpn_dst);
1864}
1865
1866static __be32
1867nfsd4_decode_seek(struct nfsd4_compoundargs *argp, struct nfsd4_seek *seek)
1868{
1869 DECODE_HEAD;
1870
1871 status = nfsd4_decode_stateid(argp, &seek->seek_stateid);
1872 if (status)
1873 return status;
1874
1875 READ_BUF(8 + 4);
1876 p = xdr_decode_hyper(p, &seek->seek_offset);
1877 seek->seek_whence = be32_to_cpup(p);
1878
1879 DECODE_TAIL;
1880}
1881
1882
1883
1884
1885
1886
1887
1888
1889
1890
1891
1892
1893
1894
1895static __be32
1896nfsd4_vbuf_from_vector(struct nfsd4_compoundargs *argp, struct kvec *head,
1897 struct page **pages, char **bufp, u32 buflen)
1898{
1899 char *tmp, *dp;
1900 u32 len;
1901
1902 if (buflen <= head->iov_len) {
1903
1904
1905
1906
1907 *bufp = head->iov_base;
1908 return 0;
1909 }
1910
1911 tmp = svcxdr_tmpalloc(argp, buflen);
1912 if (tmp == NULL)
1913 return nfserr_jukebox;
1914
1915 dp = tmp;
1916 memcpy(dp, head->iov_base, head->iov_len);
1917 buflen -= head->iov_len;
1918 dp += head->iov_len;
1919
1920 while (buflen > 0) {
1921 len = min_t(u32, buflen, PAGE_SIZE);
1922 memcpy(dp, page_address(*pages), len);
1923
1924 buflen -= len;
1925 dp += len;
1926 pages++;
1927 }
1928
1929 *bufp = tmp;
1930 return 0;
1931}
1932
1933
1934
1935
1936
1937
1938static __be32
1939nfsd4_decode_xattr_name(struct nfsd4_compoundargs *argp, char **namep)
1940{
1941 DECODE_HEAD;
1942 char *name, *sp, *dp;
1943 u32 namelen, cnt;
1944
1945 READ_BUF(4);
1946 namelen = be32_to_cpup(p++);
1947
1948 if (namelen > (XATTR_NAME_MAX - XATTR_USER_PREFIX_LEN))
1949 return nfserr_nametoolong;
1950
1951 if (namelen == 0)
1952 goto xdr_error;
1953
1954 READ_BUF(namelen);
1955
1956 name = svcxdr_tmpalloc(argp, namelen + XATTR_USER_PREFIX_LEN + 1);
1957 if (!name)
1958 return nfserr_jukebox;
1959
1960 memcpy(name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN);
1961
1962
1963
1964
1965
1966 sp = (char *)p;
1967 dp = name + XATTR_USER_PREFIX_LEN;
1968 cnt = namelen;
1969
1970 while (cnt-- > 0) {
1971 if (*sp == '\0')
1972 goto xdr_error;
1973 *dp++ = *sp++;
1974 }
1975 *dp = '\0';
1976
1977 *namep = name;
1978
1979 DECODE_TAIL;
1980}
1981
1982
1983
1984
1985
1986
1987
1988static __be32
1989nfsd4_decode_getxattr(struct nfsd4_compoundargs *argp,
1990 struct nfsd4_getxattr *getxattr)
1991{
1992 __be32 status;
1993 u32 maxcount;
1994
1995 status = nfsd4_decode_xattr_name(argp, &getxattr->getxa_name);
1996 if (status)
1997 return status;
1998
1999 maxcount = svc_max_payload(argp->rqstp);
2000 maxcount = min_t(u32, XATTR_SIZE_MAX, maxcount);
2001
2002 getxattr->getxa_len = maxcount;
2003
2004 return status;
2005}
2006
2007static __be32
2008nfsd4_decode_setxattr(struct nfsd4_compoundargs *argp,
2009 struct nfsd4_setxattr *setxattr)
2010{
2011 DECODE_HEAD;
2012 u32 flags, maxcount, size;
2013 struct kvec head;
2014 struct page **pagelist;
2015
2016 READ_BUF(4);
2017 flags = be32_to_cpup(p++);
2018
2019 if (flags > SETXATTR4_REPLACE)
2020 return nfserr_inval;
2021 setxattr->setxa_flags = flags;
2022
2023 status = nfsd4_decode_xattr_name(argp, &setxattr->setxa_name);
2024 if (status)
2025 return status;
2026
2027 maxcount = svc_max_payload(argp->rqstp);
2028 maxcount = min_t(u32, XATTR_SIZE_MAX, maxcount);
2029
2030 READ_BUF(4);
2031 size = be32_to_cpup(p++);
2032 if (size > maxcount)
2033 return nfserr_xattr2big;
2034
2035 setxattr->setxa_len = size;
2036 if (size > 0) {
2037 status = svcxdr_construct_vector(argp, &head, &pagelist, size);
2038 if (status)
2039 return status;
2040
2041 status = nfsd4_vbuf_from_vector(argp, &head, pagelist,
2042 &setxattr->setxa_buf, size);
2043 }
2044
2045 DECODE_TAIL;
2046}
2047
2048static __be32
2049nfsd4_decode_listxattrs(struct nfsd4_compoundargs *argp,
2050 struct nfsd4_listxattrs *listxattrs)
2051{
2052 DECODE_HEAD;
2053 u32 maxcount;
2054
2055 READ_BUF(12);
2056 p = xdr_decode_hyper(p, &listxattrs->lsxa_cookie);
2057
2058
2059
2060
2061
2062 if (listxattrs->lsxa_cookie >=
2063 (XATTR_LIST_MAX / (XATTR_USER_PREFIX_LEN + 2)))
2064 return nfserr_badcookie;
2065
2066 maxcount = be32_to_cpup(p++);
2067 if (maxcount < 8)
2068
2069 return nfserr_inval;
2070
2071 maxcount = min(maxcount, svc_max_payload(argp->rqstp));
2072 listxattrs->lsxa_maxcount = maxcount;
2073
2074 DECODE_TAIL;
2075}
2076
2077static __be32
2078nfsd4_decode_removexattr(struct nfsd4_compoundargs *argp,
2079 struct nfsd4_removexattr *removexattr)
2080{
2081 return nfsd4_decode_xattr_name(argp, &removexattr->rmxa_name);
2082}
2083
2084static __be32
2085nfsd4_decode_noop(struct nfsd4_compoundargs *argp, void *p)
2086{
2087 return nfs_ok;
2088}
2089
2090static __be32
2091nfsd4_decode_notsupp(struct nfsd4_compoundargs *argp, void *p)
2092{
2093 return nfserr_notsupp;
2094}
2095
2096typedef __be32(*nfsd4_dec)(struct nfsd4_compoundargs *argp, void *);
2097
2098static const nfsd4_dec nfsd4_dec_ops[] = {
2099 [OP_ACCESS] = (nfsd4_dec)nfsd4_decode_access,
2100 [OP_CLOSE] = (nfsd4_dec)nfsd4_decode_close,
2101 [OP_COMMIT] = (nfsd4_dec)nfsd4_decode_commit,
2102 [OP_CREATE] = (nfsd4_dec)nfsd4_decode_create,
2103 [OP_DELEGPURGE] = (nfsd4_dec)nfsd4_decode_notsupp,
2104 [OP_DELEGRETURN] = (nfsd4_dec)nfsd4_decode_delegreturn,
2105 [OP_GETATTR] = (nfsd4_dec)nfsd4_decode_getattr,
2106 [OP_GETFH] = (nfsd4_dec)nfsd4_decode_noop,
2107 [OP_LINK] = (nfsd4_dec)nfsd4_decode_link,
2108 [OP_LOCK] = (nfsd4_dec)nfsd4_decode_lock,
2109 [OP_LOCKT] = (nfsd4_dec)nfsd4_decode_lockt,
2110 [OP_LOCKU] = (nfsd4_dec)nfsd4_decode_locku,
2111 [OP_LOOKUP] = (nfsd4_dec)nfsd4_decode_lookup,
2112 [OP_LOOKUPP] = (nfsd4_dec)nfsd4_decode_noop,
2113 [OP_NVERIFY] = (nfsd4_dec)nfsd4_decode_verify,
2114 [OP_OPEN] = (nfsd4_dec)nfsd4_decode_open,
2115 [OP_OPENATTR] = (nfsd4_dec)nfsd4_decode_notsupp,
2116 [OP_OPEN_CONFIRM] = (nfsd4_dec)nfsd4_decode_open_confirm,
2117 [OP_OPEN_DOWNGRADE] = (nfsd4_dec)nfsd4_decode_open_downgrade,
2118 [OP_PUTFH] = (nfsd4_dec)nfsd4_decode_putfh,
2119 [OP_PUTPUBFH] = (nfsd4_dec)nfsd4_decode_putpubfh,
2120 [OP_PUTROOTFH] = (nfsd4_dec)nfsd4_decode_noop,
2121 [OP_READ] = (nfsd4_dec)nfsd4_decode_read,
2122 [OP_READDIR] = (nfsd4_dec)nfsd4_decode_readdir,
2123 [OP_READLINK] = (nfsd4_dec)nfsd4_decode_noop,
2124 [OP_REMOVE] = (nfsd4_dec)nfsd4_decode_remove,
2125 [OP_RENAME] = (nfsd4_dec)nfsd4_decode_rename,
2126 [OP_RENEW] = (nfsd4_dec)nfsd4_decode_renew,
2127 [OP_RESTOREFH] = (nfsd4_dec)nfsd4_decode_noop,
2128 [OP_SAVEFH] = (nfsd4_dec)nfsd4_decode_noop,
2129 [OP_SECINFO] = (nfsd4_dec)nfsd4_decode_secinfo,
2130 [OP_SETATTR] = (nfsd4_dec)nfsd4_decode_setattr,
2131 [OP_SETCLIENTID] = (nfsd4_dec)nfsd4_decode_setclientid,
2132 [OP_SETCLIENTID_CONFIRM] = (nfsd4_dec)nfsd4_decode_setclientid_confirm,
2133 [OP_VERIFY] = (nfsd4_dec)nfsd4_decode_verify,
2134 [OP_WRITE] = (nfsd4_dec)nfsd4_decode_write,
2135 [OP_RELEASE_LOCKOWNER] = (nfsd4_dec)nfsd4_decode_release_lockowner,
2136
2137
2138 [OP_BACKCHANNEL_CTL] = (nfsd4_dec)nfsd4_decode_backchannel_ctl,
2139 [OP_BIND_CONN_TO_SESSION]= (nfsd4_dec)nfsd4_decode_bind_conn_to_session,
2140 [OP_EXCHANGE_ID] = (nfsd4_dec)nfsd4_decode_exchange_id,
2141 [OP_CREATE_SESSION] = (nfsd4_dec)nfsd4_decode_create_session,
2142 [OP_DESTROY_SESSION] = (nfsd4_dec)nfsd4_decode_destroy_session,
2143 [OP_FREE_STATEID] = (nfsd4_dec)nfsd4_decode_free_stateid,
2144 [OP_GET_DIR_DELEGATION] = (nfsd4_dec)nfsd4_decode_notsupp,
2145#ifdef CONFIG_NFSD_PNFS
2146 [OP_GETDEVICEINFO] = (nfsd4_dec)nfsd4_decode_getdeviceinfo,
2147 [OP_GETDEVICELIST] = (nfsd4_dec)nfsd4_decode_notsupp,
2148 [OP_LAYOUTCOMMIT] = (nfsd4_dec)nfsd4_decode_layoutcommit,
2149 [OP_LAYOUTGET] = (nfsd4_dec)nfsd4_decode_layoutget,
2150 [OP_LAYOUTRETURN] = (nfsd4_dec)nfsd4_decode_layoutreturn,
2151#else
2152 [OP_GETDEVICEINFO] = (nfsd4_dec)nfsd4_decode_notsupp,
2153 [OP_GETDEVICELIST] = (nfsd4_dec)nfsd4_decode_notsupp,
2154 [OP_LAYOUTCOMMIT] = (nfsd4_dec)nfsd4_decode_notsupp,
2155 [OP_LAYOUTGET] = (nfsd4_dec)nfsd4_decode_notsupp,
2156 [OP_LAYOUTRETURN] = (nfsd4_dec)nfsd4_decode_notsupp,
2157#endif
2158 [OP_SECINFO_NO_NAME] = (nfsd4_dec)nfsd4_decode_secinfo_no_name,
2159 [OP_SEQUENCE] = (nfsd4_dec)nfsd4_decode_sequence,
2160 [OP_SET_SSV] = (nfsd4_dec)nfsd4_decode_notsupp,
2161 [OP_TEST_STATEID] = (nfsd4_dec)nfsd4_decode_test_stateid,
2162 [OP_WANT_DELEGATION] = (nfsd4_dec)nfsd4_decode_notsupp,
2163 [OP_DESTROY_CLIENTID] = (nfsd4_dec)nfsd4_decode_destroy_clientid,
2164 [OP_RECLAIM_COMPLETE] = (nfsd4_dec)nfsd4_decode_reclaim_complete,
2165
2166
2167 [OP_ALLOCATE] = (nfsd4_dec)nfsd4_decode_fallocate,
2168 [OP_COPY] = (nfsd4_dec)nfsd4_decode_copy,
2169 [OP_COPY_NOTIFY] = (nfsd4_dec)nfsd4_decode_copy_notify,
2170 [OP_DEALLOCATE] = (nfsd4_dec)nfsd4_decode_fallocate,
2171 [OP_IO_ADVISE] = (nfsd4_dec)nfsd4_decode_notsupp,
2172 [OP_LAYOUTERROR] = (nfsd4_dec)nfsd4_decode_notsupp,
2173 [OP_LAYOUTSTATS] = (nfsd4_dec)nfsd4_decode_notsupp,
2174 [OP_OFFLOAD_CANCEL] = (nfsd4_dec)nfsd4_decode_offload_status,
2175 [OP_OFFLOAD_STATUS] = (nfsd4_dec)nfsd4_decode_offload_status,
2176 [OP_READ_PLUS] = (nfsd4_dec)nfsd4_decode_notsupp,
2177 [OP_SEEK] = (nfsd4_dec)nfsd4_decode_seek,
2178 [OP_WRITE_SAME] = (nfsd4_dec)nfsd4_decode_notsupp,
2179 [OP_CLONE] = (nfsd4_dec)nfsd4_decode_clone,
2180
2181 [OP_GETXATTR] = (nfsd4_dec)nfsd4_decode_getxattr,
2182 [OP_SETXATTR] = (nfsd4_dec)nfsd4_decode_setxattr,
2183 [OP_LISTXATTRS] = (nfsd4_dec)nfsd4_decode_listxattrs,
2184 [OP_REMOVEXATTR] = (nfsd4_dec)nfsd4_decode_removexattr,
2185};
2186
2187static inline bool
2188nfsd4_opnum_in_range(struct nfsd4_compoundargs *argp, struct nfsd4_op *op)
2189{
2190 if (op->opnum < FIRST_NFS4_OP)
2191 return false;
2192 else if (argp->minorversion == 0 && op->opnum > LAST_NFS40_OP)
2193 return false;
2194 else if (argp->minorversion == 1 && op->opnum > LAST_NFS41_OP)
2195 return false;
2196 else if (argp->minorversion == 2 && op->opnum > LAST_NFS42_OP)
2197 return false;
2198 return true;
2199}
2200
2201static __be32
2202nfsd4_decode_compound(struct nfsd4_compoundargs *argp)
2203{
2204 DECODE_HEAD;
2205 struct nfsd4_op *op;
2206 bool cachethis = false;
2207 int auth_slack= argp->rqstp->rq_auth_slack;
2208 int max_reply = auth_slack + 8;
2209 int readcount = 0;
2210 int readbytes = 0;
2211 int i;
2212
2213 READ_BUF(4);
2214 argp->taglen = be32_to_cpup(p++);
2215 READ_BUF(argp->taglen);
2216 SAVEMEM(argp->tag, argp->taglen);
2217 READ_BUF(8);
2218 argp->minorversion = be32_to_cpup(p++);
2219 argp->opcnt = be32_to_cpup(p++);
2220 max_reply += 4 + (XDR_QUADLEN(argp->taglen) << 2);
2221
2222 if (argp->taglen > NFSD4_MAX_TAGLEN)
2223 goto xdr_error;
2224
2225
2226
2227
2228
2229 if (argp->opcnt > NFSD_MAX_OPS_PER_COMPOUND)
2230 return 0;
2231
2232 if (argp->opcnt > ARRAY_SIZE(argp->iops)) {
2233 argp->ops = kzalloc(argp->opcnt * sizeof(*argp->ops), GFP_KERNEL);
2234 if (!argp->ops) {
2235 argp->ops = argp->iops;
2236 dprintk("nfsd: couldn't allocate room for COMPOUND\n");
2237 goto xdr_error;
2238 }
2239 }
2240
2241 if (argp->minorversion > NFSD_SUPPORTED_MINOR_VERSION)
2242 argp->opcnt = 0;
2243
2244 for (i = 0; i < argp->opcnt; i++) {
2245 op = &argp->ops[i];
2246 op->replay = NULL;
2247
2248 READ_BUF(4);
2249 op->opnum = be32_to_cpup(p++);
2250
2251 if (nfsd4_opnum_in_range(argp, op))
2252 op->status = nfsd4_dec_ops[op->opnum](argp, &op->u);
2253 else {
2254 op->opnum = OP_ILLEGAL;
2255 op->status = nfserr_op_illegal;
2256 }
2257 op->opdesc = OPDESC(op);
2258
2259
2260
2261
2262 cachethis |= nfsd4_cache_this_op(op);
2263
2264 if (op->opnum == OP_READ) {
2265 readcount++;
2266 readbytes += nfsd4_max_reply(argp->rqstp, op);
2267 } else
2268 max_reply += nfsd4_max_reply(argp->rqstp, op);
2269
2270
2271
2272
2273
2274
2275 if (op->opnum == OP_LOCK || op->opnum == OP_LOCKT)
2276 max_reply += NFS4_OPAQUE_LIMIT;
2277
2278 if (op->status) {
2279 argp->opcnt = i+1;
2280 break;
2281 }
2282 }
2283
2284 if (argp->minorversion)
2285 cachethis = false;
2286 svc_reserve(argp->rqstp, max_reply + readbytes);
2287 argp->rqstp->rq_cachetype = cachethis ? RC_REPLBUFF : RC_NOCACHE;
2288
2289 if (readcount > 1 || max_reply > PAGE_SIZE - auth_slack)
2290 clear_bit(RQ_SPLICE_OK, &argp->rqstp->rq_flags);
2291
2292 DECODE_TAIL;
2293}
2294
2295static __be32 *encode_change(__be32 *p, struct kstat *stat, struct inode *inode,
2296 struct svc_export *exp)
2297{
2298 if (exp->ex_flags & NFSEXP_V4ROOT) {
2299 *p++ = cpu_to_be32(convert_to_wallclock(exp->cd->flush_time));
2300 *p++ = 0;
2301 } else if (IS_I_VERSION(inode)) {
2302 p = xdr_encode_hyper(p, nfsd4_change_attribute(stat, inode));
2303 } else {
2304 *p++ = cpu_to_be32(stat->ctime.tv_sec);
2305 *p++ = cpu_to_be32(stat->ctime.tv_nsec);
2306 }
2307 return p;
2308}
2309
2310
2311
2312
2313
2314
2315
2316
2317
2318
2319
2320
2321static __be32 *encode_time_delta(__be32 *p, struct inode *inode)
2322{
2323 struct timespec64 ts;
2324 u32 ns;
2325
2326 ns = max_t(u32, NSEC_PER_SEC/HZ, inode->i_sb->s_time_gran);
2327 ts = ns_to_timespec64(ns);
2328
2329 p = xdr_encode_hyper(p, ts.tv_sec);
2330 *p++ = cpu_to_be32(ts.tv_nsec);
2331
2332 return p;
2333}
2334
2335static __be32 *encode_cinfo(__be32 *p, struct nfsd4_change_info *c)
2336{
2337 *p++ = cpu_to_be32(c->atomic);
2338 if (c->change_supported) {
2339 p = xdr_encode_hyper(p, c->before_change);
2340 p = xdr_encode_hyper(p, c->after_change);
2341 } else {
2342 *p++ = cpu_to_be32(c->before_ctime_sec);
2343 *p++ = cpu_to_be32(c->before_ctime_nsec);
2344 *p++ = cpu_to_be32(c->after_ctime_sec);
2345 *p++ = cpu_to_be32(c->after_ctime_nsec);
2346 }
2347 return p;
2348}
2349
2350
2351
2352
2353static __be32 nfsd4_encode_components_esc(struct xdr_stream *xdr, char sep,
2354 char *components, char esc_enter,
2355 char esc_exit)
2356{
2357 __be32 *p;
2358 __be32 pathlen;
2359 int pathlen_offset;
2360 int strlen, count=0;
2361 char *str, *end, *next;
2362
2363 dprintk("nfsd4_encode_components(%s)\n", components);
2364
2365 pathlen_offset = xdr->buf->len;
2366 p = xdr_reserve_space(xdr, 4);
2367 if (!p)
2368 return nfserr_resource;
2369 p++;
2370
2371 end = str = components;
2372 while (*end) {
2373 bool found_esc = false;
2374
2375
2376 if (*str == esc_enter) {
2377 for (; *end && (*end != esc_exit); end++)
2378 ;
2379 next = end + 1;
2380 if (*end && (!*next || *next == sep)) {
2381 str++;
2382 found_esc = true;
2383 }
2384 }
2385
2386 if (!found_esc)
2387 for (; *end && (*end != sep); end++)
2388 ;
2389
2390 strlen = end - str;
2391 if (strlen) {
2392 p = xdr_reserve_space(xdr, strlen + 4);
2393 if (!p)
2394 return nfserr_resource;
2395 p = xdr_encode_opaque(p, str, strlen);
2396 count++;
2397 }
2398 else
2399 end++;
2400 if (found_esc)
2401 end = next;
2402
2403 str = end;
2404 }
2405 pathlen = htonl(count);
2406 write_bytes_to_xdr_buf(xdr->buf, pathlen_offset, &pathlen, 4);
2407 return 0;
2408}
2409
2410
2411
2412
2413static __be32 nfsd4_encode_components(struct xdr_stream *xdr, char sep,
2414 char *components)
2415{
2416 return nfsd4_encode_components_esc(xdr, sep, components, 0, 0);
2417}
2418
2419
2420
2421
2422static __be32 nfsd4_encode_fs_location4(struct xdr_stream *xdr,
2423 struct nfsd4_fs_location *location)
2424{
2425 __be32 status;
2426
2427 status = nfsd4_encode_components_esc(xdr, ':', location->hosts,
2428 '[', ']');
2429 if (status)
2430 return status;
2431 status = nfsd4_encode_components(xdr, '/', location->path);
2432 if (status)
2433 return status;
2434 return 0;
2435}
2436
2437
2438
2439
2440static __be32 nfsd4_encode_path(struct xdr_stream *xdr,
2441 const struct path *root,
2442 const struct path *path)
2443{
2444 struct path cur = *path;
2445 __be32 *p;
2446 struct dentry **components = NULL;
2447 unsigned int ncomponents = 0;
2448 __be32 err = nfserr_jukebox;
2449
2450 dprintk("nfsd4_encode_components(");
2451
2452 path_get(&cur);
2453
2454
2455
2456 for (;;) {
2457 if (path_equal(&cur, root))
2458 break;
2459 if (cur.dentry == cur.mnt->mnt_root) {
2460 if (follow_up(&cur))
2461 continue;
2462 goto out_free;
2463 }
2464 if ((ncomponents & 15) == 0) {
2465 struct dentry **new;
2466 new = krealloc(components,
2467 sizeof(*new) * (ncomponents + 16),
2468 GFP_KERNEL);
2469 if (!new)
2470 goto out_free;
2471 components = new;
2472 }
2473 components[ncomponents++] = cur.dentry;
2474 cur.dentry = dget_parent(cur.dentry);
2475 }
2476 err = nfserr_resource;
2477 p = xdr_reserve_space(xdr, 4);
2478 if (!p)
2479 goto out_free;
2480 *p++ = cpu_to_be32(ncomponents);
2481
2482 while (ncomponents) {
2483 struct dentry *dentry = components[ncomponents - 1];
2484 unsigned int len;
2485
2486 spin_lock(&dentry->d_lock);
2487 len = dentry->d_name.len;
2488 p = xdr_reserve_space(xdr, len + 4);
2489 if (!p) {
2490 spin_unlock(&dentry->d_lock);
2491 goto out_free;
2492 }
2493 p = xdr_encode_opaque(p, dentry->d_name.name, len);
2494 dprintk("/%pd", dentry);
2495 spin_unlock(&dentry->d_lock);
2496 dput(dentry);
2497 ncomponents--;
2498 }
2499
2500 err = 0;
2501out_free:
2502 dprintk(")\n");
2503 while (ncomponents)
2504 dput(components[--ncomponents]);
2505 kfree(components);
2506 path_put(&cur);
2507 return err;
2508}
2509
2510static __be32 nfsd4_encode_fsloc_fsroot(struct xdr_stream *xdr,
2511 struct svc_rqst *rqstp, const struct path *path)
2512{
2513 struct svc_export *exp_ps;
2514 __be32 res;
2515
2516 exp_ps = rqst_find_fsidzero_export(rqstp);
2517 if (IS_ERR(exp_ps))
2518 return nfserrno(PTR_ERR(exp_ps));
2519 res = nfsd4_encode_path(xdr, &exp_ps->ex_path, path);
2520 exp_put(exp_ps);
2521 return res;
2522}
2523
2524
2525
2526
2527static __be32 nfsd4_encode_fs_locations(struct xdr_stream *xdr,
2528 struct svc_rqst *rqstp, struct svc_export *exp)
2529{
2530 __be32 status;
2531 int i;
2532 __be32 *p;
2533 struct nfsd4_fs_locations *fslocs = &exp->ex_fslocs;
2534
2535 status = nfsd4_encode_fsloc_fsroot(xdr, rqstp, &exp->ex_path);
2536 if (status)
2537 return status;
2538 p = xdr_reserve_space(xdr, 4);
2539 if (!p)
2540 return nfserr_resource;
2541 *p++ = cpu_to_be32(fslocs->locations_count);
2542 for (i=0; i<fslocs->locations_count; i++) {
2543 status = nfsd4_encode_fs_location4(xdr, &fslocs->locations[i]);
2544 if (status)
2545 return status;
2546 }
2547 return 0;
2548}
2549
2550static u32 nfs4_file_type(umode_t mode)
2551{
2552 switch (mode & S_IFMT) {
2553 case S_IFIFO: return NF4FIFO;
2554 case S_IFCHR: return NF4CHR;
2555 case S_IFDIR: return NF4DIR;
2556 case S_IFBLK: return NF4BLK;
2557 case S_IFLNK: return NF4LNK;
2558 case S_IFREG: return NF4REG;
2559 case S_IFSOCK: return NF4SOCK;
2560 default: return NF4BAD;
2561 };
2562}
2563
2564static inline __be32
2565nfsd4_encode_aclname(struct xdr_stream *xdr, struct svc_rqst *rqstp,
2566 struct nfs4_ace *ace)
2567{
2568 if (ace->whotype != NFS4_ACL_WHO_NAMED)
2569 return nfs4_acl_write_who(xdr, ace->whotype);
2570 else if (ace->flag & NFS4_ACE_IDENTIFIER_GROUP)
2571 return nfsd4_encode_group(xdr, rqstp, ace->who_gid);
2572 else
2573 return nfsd4_encode_user(xdr, rqstp, ace->who_uid);
2574}
2575
2576static inline __be32
2577nfsd4_encode_layout_types(struct xdr_stream *xdr, u32 layout_types)
2578{
2579 __be32 *p;
2580 unsigned long i = hweight_long(layout_types);
2581
2582 p = xdr_reserve_space(xdr, 4 + 4 * i);
2583 if (!p)
2584 return nfserr_resource;
2585
2586 *p++ = cpu_to_be32(i);
2587
2588 for (i = LAYOUT_NFSV4_1_FILES; i < LAYOUT_TYPE_MAX; ++i)
2589 if (layout_types & (1 << i))
2590 *p++ = cpu_to_be32(i);
2591
2592 return 0;
2593}
2594
2595#define WORD0_ABSENT_FS_ATTRS (FATTR4_WORD0_FS_LOCATIONS | FATTR4_WORD0_FSID | \
2596 FATTR4_WORD0_RDATTR_ERROR)
2597#define WORD1_ABSENT_FS_ATTRS FATTR4_WORD1_MOUNTED_ON_FILEID
2598#define WORD2_ABSENT_FS_ATTRS 0
2599
2600#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
2601static inline __be32
2602nfsd4_encode_security_label(struct xdr_stream *xdr, struct svc_rqst *rqstp,
2603 void *context, int len)
2604{
2605 __be32 *p;
2606
2607 p = xdr_reserve_space(xdr, len + 4 + 4 + 4);
2608 if (!p)
2609 return nfserr_resource;
2610
2611
2612
2613
2614
2615 *p++ = cpu_to_be32(0);
2616 *p++ = cpu_to_be32(0);
2617 p = xdr_encode_opaque(p, context, len);
2618 return 0;
2619}
2620#else
2621static inline __be32
2622nfsd4_encode_security_label(struct xdr_stream *xdr, struct svc_rqst *rqstp,
2623 void *context, int len)
2624{ return 0; }
2625#endif
2626
2627static __be32 fattr_handle_absent_fs(u32 *bmval0, u32 *bmval1, u32 *bmval2, u32 *rdattr_err)
2628{
2629
2630 if (*bmval0 & ~WORD0_ABSENT_FS_ATTRS ||
2631 *bmval1 & ~WORD1_ABSENT_FS_ATTRS) {
2632 if (*bmval0 & FATTR4_WORD0_RDATTR_ERROR ||
2633 *bmval0 & FATTR4_WORD0_FS_LOCATIONS)
2634 *rdattr_err = NFSERR_MOVED;
2635 else
2636 return nfserr_moved;
2637 }
2638 *bmval0 &= WORD0_ABSENT_FS_ATTRS;
2639 *bmval1 &= WORD1_ABSENT_FS_ATTRS;
2640 *bmval2 &= WORD2_ABSENT_FS_ATTRS;
2641 return 0;
2642}
2643
2644
2645static int get_parent_attributes(struct svc_export *exp, struct kstat *stat)
2646{
2647 struct path path = exp->ex_path;
2648 int err;
2649
2650 path_get(&path);
2651 while (follow_up(&path)) {
2652 if (path.dentry != path.mnt->mnt_root)
2653 break;
2654 }
2655 err = vfs_getattr(&path, stat, STATX_BASIC_STATS, AT_STATX_SYNC_AS_STAT);
2656 path_put(&path);
2657 return err;
2658}
2659
2660static __be32
2661nfsd4_encode_bitmap(struct xdr_stream *xdr, u32 bmval0, u32 bmval1, u32 bmval2)
2662{
2663 __be32 *p;
2664
2665 if (bmval2) {
2666 p = xdr_reserve_space(xdr, 16);
2667 if (!p)
2668 goto out_resource;
2669 *p++ = cpu_to_be32(3);
2670 *p++ = cpu_to_be32(bmval0);
2671 *p++ = cpu_to_be32(bmval1);
2672 *p++ = cpu_to_be32(bmval2);
2673 } else if (bmval1) {
2674 p = xdr_reserve_space(xdr, 12);
2675 if (!p)
2676 goto out_resource;
2677 *p++ = cpu_to_be32(2);
2678 *p++ = cpu_to_be32(bmval0);
2679 *p++ = cpu_to_be32(bmval1);
2680 } else {
2681 p = xdr_reserve_space(xdr, 8);
2682 if (!p)
2683 goto out_resource;
2684 *p++ = cpu_to_be32(1);
2685 *p++ = cpu_to_be32(bmval0);
2686 }
2687
2688 return 0;
2689out_resource:
2690 return nfserr_resource;
2691}
2692
2693
2694
2695
2696
2697static __be32
2698nfsd4_encode_fattr(struct xdr_stream *xdr, struct svc_fh *fhp,
2699 struct svc_export *exp,
2700 struct dentry *dentry, u32 *bmval,
2701 struct svc_rqst *rqstp, int ignore_crossmnt)
2702{
2703 u32 bmval0 = bmval[0];
2704 u32 bmval1 = bmval[1];
2705 u32 bmval2 = bmval[2];
2706 struct kstat stat;
2707 struct svc_fh *tempfh = NULL;
2708 struct kstatfs statfs;
2709 __be32 *p;
2710 int starting_len = xdr->buf->len;
2711 int attrlen_offset;
2712 __be32 attrlen;
2713 u32 dummy;
2714 u64 dummy64;
2715 u32 rdattr_err = 0;
2716 __be32 status;
2717 int err;
2718 struct nfs4_acl *acl = NULL;
2719#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
2720 void *context = NULL;
2721 int contextlen;
2722#endif
2723 bool contextsupport = false;
2724 struct nfsd4_compoundres *resp = rqstp->rq_resp;
2725 u32 minorversion = resp->cstate.minorversion;
2726 struct path path = {
2727 .mnt = exp->ex_path.mnt,
2728 .dentry = dentry,
2729 };
2730 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
2731
2732 BUG_ON(bmval1 & NFSD_WRITEONLY_ATTRS_WORD1);
2733 BUG_ON(!nfsd_attrs_supported(minorversion, bmval));
2734
2735 if (exp->ex_fslocs.migrated) {
2736 status = fattr_handle_absent_fs(&bmval0, &bmval1, &bmval2, &rdattr_err);
2737 if (status)
2738 goto out;
2739 }
2740
2741 err = vfs_getattr(&path, &stat, STATX_BASIC_STATS, AT_STATX_SYNC_AS_STAT);
2742 if (err)
2743 goto out_nfserr;
2744 if ((bmval0 & (FATTR4_WORD0_FILES_AVAIL | FATTR4_WORD0_FILES_FREE |
2745 FATTR4_WORD0_FILES_TOTAL | FATTR4_WORD0_MAXNAME)) ||
2746 (bmval1 & (FATTR4_WORD1_SPACE_AVAIL | FATTR4_WORD1_SPACE_FREE |
2747 FATTR4_WORD1_SPACE_TOTAL))) {
2748 err = vfs_statfs(&path, &statfs);
2749 if (err)
2750 goto out_nfserr;
2751 }
2752 if ((bmval0 & (FATTR4_WORD0_FILEHANDLE | FATTR4_WORD0_FSID)) && !fhp) {
2753 tempfh = kmalloc(sizeof(struct svc_fh), GFP_KERNEL);
2754 status = nfserr_jukebox;
2755 if (!tempfh)
2756 goto out;
2757 fh_init(tempfh, NFS4_FHSIZE);
2758 status = fh_compose(tempfh, exp, dentry, NULL);
2759 if (status)
2760 goto out;
2761 fhp = tempfh;
2762 }
2763 if (bmval0 & FATTR4_WORD0_ACL) {
2764 err = nfsd4_get_nfs4_acl(rqstp, dentry, &acl);
2765 if (err == -EOPNOTSUPP)
2766 bmval0 &= ~FATTR4_WORD0_ACL;
2767 else if (err == -EINVAL) {
2768 status = nfserr_attrnotsupp;
2769 goto out;
2770 } else if (err != 0)
2771 goto out_nfserr;
2772 }
2773
2774#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
2775 if ((bmval2 & FATTR4_WORD2_SECURITY_LABEL) ||
2776 bmval0 & FATTR4_WORD0_SUPPORTED_ATTRS) {
2777 if (exp->ex_flags & NFSEXP_SECURITY_LABEL)
2778 err = security_inode_getsecctx(d_inode(dentry),
2779 &context, &contextlen);
2780 else
2781 err = -EOPNOTSUPP;
2782 contextsupport = (err == 0);
2783 if (bmval2 & FATTR4_WORD2_SECURITY_LABEL) {
2784 if (err == -EOPNOTSUPP)
2785 bmval2 &= ~FATTR4_WORD2_SECURITY_LABEL;
2786 else if (err)
2787 goto out_nfserr;
2788 }
2789 }
2790#endif
2791
2792 status = nfsd4_encode_bitmap(xdr, bmval0, bmval1, bmval2);
2793 if (status)
2794 goto out;
2795
2796 attrlen_offset = xdr->buf->len;
2797 p = xdr_reserve_space(xdr, 4);
2798 if (!p)
2799 goto out_resource;
2800 p++;
2801
2802 if (bmval0 & FATTR4_WORD0_SUPPORTED_ATTRS) {
2803 u32 supp[3];
2804
2805 memcpy(supp, nfsd_suppattrs[minorversion], sizeof(supp));
2806
2807 if (!IS_POSIXACL(dentry->d_inode))
2808 supp[0] &= ~FATTR4_WORD0_ACL;
2809 if (!contextsupport)
2810 supp[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
2811 if (!supp[2]) {
2812 p = xdr_reserve_space(xdr, 12);
2813 if (!p)
2814 goto out_resource;
2815 *p++ = cpu_to_be32(2);
2816 *p++ = cpu_to_be32(supp[0]);
2817 *p++ = cpu_to_be32(supp[1]);
2818 } else {
2819 p = xdr_reserve_space(xdr, 16);
2820 if (!p)
2821 goto out_resource;
2822 *p++ = cpu_to_be32(3);
2823 *p++ = cpu_to_be32(supp[0]);
2824 *p++ = cpu_to_be32(supp[1]);
2825 *p++ = cpu_to_be32(supp[2]);
2826 }
2827 }
2828 if (bmval0 & FATTR4_WORD0_TYPE) {
2829 p = xdr_reserve_space(xdr, 4);
2830 if (!p)
2831 goto out_resource;
2832 dummy = nfs4_file_type(stat.mode);
2833 if (dummy == NF4BAD) {
2834 status = nfserr_serverfault;
2835 goto out;
2836 }
2837 *p++ = cpu_to_be32(dummy);
2838 }
2839 if (bmval0 & FATTR4_WORD0_FH_EXPIRE_TYPE) {
2840 p = xdr_reserve_space(xdr, 4);
2841 if (!p)
2842 goto out_resource;
2843 if (exp->ex_flags & NFSEXP_NOSUBTREECHECK)
2844 *p++ = cpu_to_be32(NFS4_FH_PERSISTENT);
2845 else
2846 *p++ = cpu_to_be32(NFS4_FH_PERSISTENT|
2847 NFS4_FH_VOL_RENAME);
2848 }
2849 if (bmval0 & FATTR4_WORD0_CHANGE) {
2850 p = xdr_reserve_space(xdr, 8);
2851 if (!p)
2852 goto out_resource;
2853 p = encode_change(p, &stat, d_inode(dentry), exp);
2854 }
2855 if (bmval0 & FATTR4_WORD0_SIZE) {
2856 p = xdr_reserve_space(xdr, 8);
2857 if (!p)
2858 goto out_resource;
2859 p = xdr_encode_hyper(p, stat.size);
2860 }
2861 if (bmval0 & FATTR4_WORD0_LINK_SUPPORT) {
2862 p = xdr_reserve_space(xdr, 4);
2863 if (!p)
2864 goto out_resource;
2865 *p++ = cpu_to_be32(1);
2866 }
2867 if (bmval0 & FATTR4_WORD0_SYMLINK_SUPPORT) {
2868 p = xdr_reserve_space(xdr, 4);
2869 if (!p)
2870 goto out_resource;
2871 *p++ = cpu_to_be32(1);
2872 }
2873 if (bmval0 & FATTR4_WORD0_NAMED_ATTR) {
2874 p = xdr_reserve_space(xdr, 4);
2875 if (!p)
2876 goto out_resource;
2877 *p++ = cpu_to_be32(0);
2878 }
2879 if (bmval0 & FATTR4_WORD0_FSID) {
2880 p = xdr_reserve_space(xdr, 16);
2881 if (!p)
2882 goto out_resource;
2883 if (exp->ex_fslocs.migrated) {
2884 p = xdr_encode_hyper(p, NFS4_REFERRAL_FSID_MAJOR);
2885 p = xdr_encode_hyper(p, NFS4_REFERRAL_FSID_MINOR);
2886 } else switch(fsid_source(fhp)) {
2887 case FSIDSOURCE_FSID:
2888 p = xdr_encode_hyper(p, (u64)exp->ex_fsid);
2889 p = xdr_encode_hyper(p, (u64)0);
2890 break;
2891 case FSIDSOURCE_DEV:
2892 *p++ = cpu_to_be32(0);
2893 *p++ = cpu_to_be32(MAJOR(stat.dev));
2894 *p++ = cpu_to_be32(0);
2895 *p++ = cpu_to_be32(MINOR(stat.dev));
2896 break;
2897 case FSIDSOURCE_UUID:
2898 p = xdr_encode_opaque_fixed(p, exp->ex_uuid,
2899 EX_UUID_LEN);
2900 break;
2901 }
2902 }
2903 if (bmval0 & FATTR4_WORD0_UNIQUE_HANDLES) {
2904 p = xdr_reserve_space(xdr, 4);
2905 if (!p)
2906 goto out_resource;
2907 *p++ = cpu_to_be32(0);
2908 }
2909 if (bmval0 & FATTR4_WORD0_LEASE_TIME) {
2910 p = xdr_reserve_space(xdr, 4);
2911 if (!p)
2912 goto out_resource;
2913 *p++ = cpu_to_be32(nn->nfsd4_lease);
2914 }
2915 if (bmval0 & FATTR4_WORD0_RDATTR_ERROR) {
2916 p = xdr_reserve_space(xdr, 4);
2917 if (!p)
2918 goto out_resource;
2919 *p++ = cpu_to_be32(rdattr_err);
2920 }
2921 if (bmval0 & FATTR4_WORD0_ACL) {
2922 struct nfs4_ace *ace;
2923
2924 if (acl == NULL) {
2925 p = xdr_reserve_space(xdr, 4);
2926 if (!p)
2927 goto out_resource;
2928
2929 *p++ = cpu_to_be32(0);
2930 goto out_acl;
2931 }
2932 p = xdr_reserve_space(xdr, 4);
2933 if (!p)
2934 goto out_resource;
2935 *p++ = cpu_to_be32(acl->naces);
2936
2937 for (ace = acl->aces; ace < acl->aces + acl->naces; ace++) {
2938 p = xdr_reserve_space(xdr, 4*3);
2939 if (!p)
2940 goto out_resource;
2941 *p++ = cpu_to_be32(ace->type);
2942 *p++ = cpu_to_be32(ace->flag);
2943 *p++ = cpu_to_be32(ace->access_mask &
2944 NFS4_ACE_MASK_ALL);
2945 status = nfsd4_encode_aclname(xdr, rqstp, ace);
2946 if (status)
2947 goto out;
2948 }
2949 }
2950out_acl:
2951 if (bmval0 & FATTR4_WORD0_ACLSUPPORT) {
2952 p = xdr_reserve_space(xdr, 4);
2953 if (!p)
2954 goto out_resource;
2955 *p++ = cpu_to_be32(IS_POSIXACL(dentry->d_inode) ?
2956 ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL : 0);
2957 }
2958 if (bmval0 & FATTR4_WORD0_CANSETTIME) {
2959 p = xdr_reserve_space(xdr, 4);
2960 if (!p)
2961 goto out_resource;
2962 *p++ = cpu_to_be32(1);
2963 }
2964 if (bmval0 & FATTR4_WORD0_CASE_INSENSITIVE) {
2965 p = xdr_reserve_space(xdr, 4);
2966 if (!p)
2967 goto out_resource;
2968 *p++ = cpu_to_be32(0);
2969 }
2970 if (bmval0 & FATTR4_WORD0_CASE_PRESERVING) {
2971 p = xdr_reserve_space(xdr, 4);
2972 if (!p)
2973 goto out_resource;
2974 *p++ = cpu_to_be32(1);
2975 }
2976 if (bmval0 & FATTR4_WORD0_CHOWN_RESTRICTED) {
2977 p = xdr_reserve_space(xdr, 4);
2978 if (!p)
2979 goto out_resource;
2980 *p++ = cpu_to_be32(1);
2981 }
2982 if (bmval0 & FATTR4_WORD0_FILEHANDLE) {
2983 p = xdr_reserve_space(xdr, fhp->fh_handle.fh_size + 4);
2984 if (!p)
2985 goto out_resource;
2986 p = xdr_encode_opaque(p, &fhp->fh_handle.fh_base,
2987 fhp->fh_handle.fh_size);
2988 }
2989 if (bmval0 & FATTR4_WORD0_FILEID) {
2990 p = xdr_reserve_space(xdr, 8);
2991 if (!p)
2992 goto out_resource;
2993 p = xdr_encode_hyper(p, stat.ino);
2994 }
2995 if (bmval0 & FATTR4_WORD0_FILES_AVAIL) {
2996 p = xdr_reserve_space(xdr, 8);
2997 if (!p)
2998 goto out_resource;
2999 p = xdr_encode_hyper(p, (u64) statfs.f_ffree);
3000 }
3001 if (bmval0 & FATTR4_WORD0_FILES_FREE) {
3002 p = xdr_reserve_space(xdr, 8);
3003 if (!p)
3004 goto out_resource;
3005 p = xdr_encode_hyper(p, (u64) statfs.f_ffree);
3006 }
3007 if (bmval0 & FATTR4_WORD0_FILES_TOTAL) {
3008 p = xdr_reserve_space(xdr, 8);
3009 if (!p)
3010 goto out_resource;
3011 p = xdr_encode_hyper(p, (u64) statfs.f_files);
3012 }
3013 if (bmval0 & FATTR4_WORD0_FS_LOCATIONS) {
3014 status = nfsd4_encode_fs_locations(xdr, rqstp, exp);
3015 if (status)
3016 goto out;
3017 }
3018 if (bmval0 & FATTR4_WORD0_HOMOGENEOUS) {
3019 p = xdr_reserve_space(xdr, 4);
3020 if (!p)
3021 goto out_resource;
3022 *p++ = cpu_to_be32(1);
3023 }
3024 if (bmval0 & FATTR4_WORD0_MAXFILESIZE) {
3025 p = xdr_reserve_space(xdr, 8);
3026 if (!p)
3027 goto out_resource;
3028 p = xdr_encode_hyper(p, exp->ex_path.mnt->mnt_sb->s_maxbytes);
3029 }
3030 if (bmval0 & FATTR4_WORD0_MAXLINK) {
3031 p = xdr_reserve_space(xdr, 4);
3032 if (!p)
3033 goto out_resource;
3034 *p++ = cpu_to_be32(255);
3035 }
3036 if (bmval0 & FATTR4_WORD0_MAXNAME) {
3037 p = xdr_reserve_space(xdr, 4);
3038 if (!p)
3039 goto out_resource;
3040 *p++ = cpu_to_be32(statfs.f_namelen);
3041 }
3042 if (bmval0 & FATTR4_WORD0_MAXREAD) {
3043 p = xdr_reserve_space(xdr, 8);
3044 if (!p)
3045 goto out_resource;
3046 p = xdr_encode_hyper(p, (u64) svc_max_payload(rqstp));
3047 }
3048 if (bmval0 & FATTR4_WORD0_MAXWRITE) {
3049 p = xdr_reserve_space(xdr, 8);
3050 if (!p)
3051 goto out_resource;
3052 p = xdr_encode_hyper(p, (u64) svc_max_payload(rqstp));
3053 }
3054 if (bmval1 & FATTR4_WORD1_MODE) {
3055 p = xdr_reserve_space(xdr, 4);
3056 if (!p)
3057 goto out_resource;
3058 *p++ = cpu_to_be32(stat.mode & S_IALLUGO);
3059 }
3060 if (bmval1 & FATTR4_WORD1_NO_TRUNC) {
3061 p = xdr_reserve_space(xdr, 4);
3062 if (!p)
3063 goto out_resource;
3064 *p++ = cpu_to_be32(1);
3065 }
3066 if (bmval1 & FATTR4_WORD1_NUMLINKS) {
3067 p = xdr_reserve_space(xdr, 4);
3068 if (!p)
3069 goto out_resource;
3070 *p++ = cpu_to_be32(stat.nlink);
3071 }
3072 if (bmval1 & FATTR4_WORD1_OWNER) {
3073 status = nfsd4_encode_user(xdr, rqstp, stat.uid);
3074 if (status)
3075 goto out;
3076 }
3077 if (bmval1 & FATTR4_WORD1_OWNER_GROUP) {
3078 status = nfsd4_encode_group(xdr, rqstp, stat.gid);
3079 if (status)
3080 goto out;
3081 }
3082 if (bmval1 & FATTR4_WORD1_RAWDEV) {
3083 p = xdr_reserve_space(xdr, 8);
3084 if (!p)
3085 goto out_resource;
3086 *p++ = cpu_to_be32((u32) MAJOR(stat.rdev));
3087 *p++ = cpu_to_be32((u32) MINOR(stat.rdev));
3088 }
3089 if (bmval1 & FATTR4_WORD1_SPACE_AVAIL) {
3090 p = xdr_reserve_space(xdr, 8);
3091 if (!p)
3092 goto out_resource;
3093 dummy64 = (u64)statfs.f_bavail * (u64)statfs.f_bsize;
3094 p = xdr_encode_hyper(p, dummy64);
3095 }
3096 if (bmval1 & FATTR4_WORD1_SPACE_FREE) {
3097 p = xdr_reserve_space(xdr, 8);
3098 if (!p)
3099 goto out_resource;
3100 dummy64 = (u64)statfs.f_bfree * (u64)statfs.f_bsize;
3101 p = xdr_encode_hyper(p, dummy64);
3102 }
3103 if (bmval1 & FATTR4_WORD1_SPACE_TOTAL) {
3104 p = xdr_reserve_space(xdr, 8);
3105 if (!p)
3106 goto out_resource;
3107 dummy64 = (u64)statfs.f_blocks * (u64)statfs.f_bsize;
3108 p = xdr_encode_hyper(p, dummy64);
3109 }
3110 if (bmval1 & FATTR4_WORD1_SPACE_USED) {
3111 p = xdr_reserve_space(xdr, 8);
3112 if (!p)
3113 goto out_resource;
3114 dummy64 = (u64)stat.blocks << 9;
3115 p = xdr_encode_hyper(p, dummy64);
3116 }
3117 if (bmval1 & FATTR4_WORD1_TIME_ACCESS) {
3118 p = xdr_reserve_space(xdr, 12);
3119 if (!p)
3120 goto out_resource;
3121 p = xdr_encode_hyper(p, (s64)stat.atime.tv_sec);
3122 *p++ = cpu_to_be32(stat.atime.tv_nsec);
3123 }
3124 if (bmval1 & FATTR4_WORD1_TIME_DELTA) {
3125 p = xdr_reserve_space(xdr, 12);
3126 if (!p)
3127 goto out_resource;
3128 p = encode_time_delta(p, d_inode(dentry));
3129 }
3130 if (bmval1 & FATTR4_WORD1_TIME_METADATA) {
3131 p = xdr_reserve_space(xdr, 12);
3132 if (!p)
3133 goto out_resource;
3134 p = xdr_encode_hyper(p, (s64)stat.ctime.tv_sec);
3135 *p++ = cpu_to_be32(stat.ctime.tv_nsec);
3136 }
3137 if (bmval1 & FATTR4_WORD1_TIME_MODIFY) {
3138 p = xdr_reserve_space(xdr, 12);
3139 if (!p)
3140 goto out_resource;
3141 p = xdr_encode_hyper(p, (s64)stat.mtime.tv_sec);
3142 *p++ = cpu_to_be32(stat.mtime.tv_nsec);
3143 }
3144 if (bmval1 & FATTR4_WORD1_MOUNTED_ON_FILEID) {
3145 struct kstat parent_stat;
3146 u64 ino = stat.ino;
3147
3148 p = xdr_reserve_space(xdr, 8);
3149 if (!p)
3150 goto out_resource;
3151
3152
3153
3154
3155 if (ignore_crossmnt == 0 &&
3156 dentry == exp->ex_path.mnt->mnt_root) {
3157 err = get_parent_attributes(exp, &parent_stat);
3158 if (err)
3159 goto out_nfserr;
3160 ino = parent_stat.ino;
3161 }
3162 p = xdr_encode_hyper(p, ino);
3163 }
3164#ifdef CONFIG_NFSD_PNFS
3165 if (bmval1 & FATTR4_WORD1_FS_LAYOUT_TYPES) {
3166 status = nfsd4_encode_layout_types(xdr, exp->ex_layout_types);
3167 if (status)
3168 goto out;
3169 }
3170
3171 if (bmval2 & FATTR4_WORD2_LAYOUT_TYPES) {
3172 status = nfsd4_encode_layout_types(xdr, exp->ex_layout_types);
3173 if (status)
3174 goto out;
3175 }
3176
3177 if (bmval2 & FATTR4_WORD2_LAYOUT_BLKSIZE) {
3178 p = xdr_reserve_space(xdr, 4);
3179 if (!p)
3180 goto out_resource;
3181 *p++ = cpu_to_be32(stat.blksize);
3182 }
3183#endif
3184 if (bmval2 & FATTR4_WORD2_SUPPATTR_EXCLCREAT) {
3185 u32 supp[3];
3186
3187 memcpy(supp, nfsd_suppattrs[minorversion], sizeof(supp));
3188 supp[0] &= NFSD_SUPPATTR_EXCLCREAT_WORD0;
3189 supp[1] &= NFSD_SUPPATTR_EXCLCREAT_WORD1;
3190 supp[2] &= NFSD_SUPPATTR_EXCLCREAT_WORD2;
3191
3192 status = nfsd4_encode_bitmap(xdr, supp[0], supp[1], supp[2]);
3193 if (status)
3194 goto out;
3195 }
3196
3197 if (bmval2 & FATTR4_WORD2_CHANGE_ATTR_TYPE) {
3198 p = xdr_reserve_space(xdr, 4);
3199 if (!p)
3200 goto out_resource;
3201 if (IS_I_VERSION(d_inode(dentry)))
3202 *p++ = cpu_to_be32(NFS4_CHANGE_TYPE_IS_MONOTONIC_INCR);
3203 else
3204 *p++ = cpu_to_be32(NFS4_CHANGE_TYPE_IS_TIME_METADATA);
3205 }
3206
3207#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
3208 if (bmval2 & FATTR4_WORD2_SECURITY_LABEL) {
3209 status = nfsd4_encode_security_label(xdr, rqstp, context,
3210 contextlen);
3211 if (status)
3212 goto out;
3213 }
3214#endif
3215
3216 if (bmval2 & FATTR4_WORD2_XATTR_SUPPORT) {
3217 p = xdr_reserve_space(xdr, 4);
3218 if (!p)
3219 goto out_resource;
3220 err = xattr_supported_namespace(d_inode(dentry),
3221 XATTR_USER_PREFIX);
3222 *p++ = cpu_to_be32(err == 0);
3223 }
3224
3225 attrlen = htonl(xdr->buf->len - attrlen_offset - 4);
3226 write_bytes_to_xdr_buf(xdr->buf, attrlen_offset, &attrlen, 4);
3227 status = nfs_ok;
3228
3229out:
3230#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
3231 if (context)
3232 security_release_secctx(context, contextlen);
3233#endif
3234 kfree(acl);
3235 if (tempfh) {
3236 fh_put(tempfh);
3237 kfree(tempfh);
3238 }
3239 if (status)
3240 xdr_truncate_encode(xdr, starting_len);
3241 return status;
3242out_nfserr:
3243 status = nfserrno(err);
3244 goto out;
3245out_resource:
3246 status = nfserr_resource;
3247 goto out;
3248}
3249
3250static void svcxdr_init_encode_from_buffer(struct xdr_stream *xdr,
3251 struct xdr_buf *buf, __be32 *p, int bytes)
3252{
3253 xdr->scratch.iov_len = 0;
3254 memset(buf, 0, sizeof(struct xdr_buf));
3255 buf->head[0].iov_base = p;
3256 buf->head[0].iov_len = 0;
3257 buf->len = 0;
3258 xdr->buf = buf;
3259 xdr->iov = buf->head;
3260 xdr->p = p;
3261 xdr->end = (void *)p + bytes;
3262 buf->buflen = bytes;
3263}
3264
3265__be32 nfsd4_encode_fattr_to_buf(__be32 **p, int words,
3266 struct svc_fh *fhp, struct svc_export *exp,
3267 struct dentry *dentry, u32 *bmval,
3268 struct svc_rqst *rqstp, int ignore_crossmnt)
3269{
3270 struct xdr_buf dummy;
3271 struct xdr_stream xdr;
3272 __be32 ret;
3273
3274 svcxdr_init_encode_from_buffer(&xdr, &dummy, *p, words << 2);
3275 ret = nfsd4_encode_fattr(&xdr, fhp, exp, dentry, bmval, rqstp,
3276 ignore_crossmnt);
3277 *p = xdr.p;
3278 return ret;
3279}
3280
3281static inline int attributes_need_mount(u32 *bmval)
3282{
3283 if (bmval[0] & ~(FATTR4_WORD0_RDATTR_ERROR | FATTR4_WORD0_LEASE_TIME))
3284 return 1;
3285 if (bmval[1] & ~FATTR4_WORD1_MOUNTED_ON_FILEID)
3286 return 1;
3287 return 0;
3288}
3289
3290static __be32
3291nfsd4_encode_dirent_fattr(struct xdr_stream *xdr, struct nfsd4_readdir *cd,
3292 const char *name, int namlen)
3293{
3294 struct svc_export *exp = cd->rd_fhp->fh_export;
3295 struct dentry *dentry;
3296 __be32 nfserr;
3297 int ignore_crossmnt = 0;
3298
3299 dentry = lookup_positive_unlocked(name, cd->rd_fhp->fh_dentry, namlen);
3300 if (IS_ERR(dentry))
3301 return nfserrno(PTR_ERR(dentry));
3302
3303 exp_get(exp);
3304
3305
3306
3307
3308
3309
3310
3311 if (nfsd_mountpoint(dentry, exp)) {
3312 int err;
3313
3314 if (!(exp->ex_flags & NFSEXP_V4ROOT)
3315 && !attributes_need_mount(cd->rd_bmval)) {
3316 ignore_crossmnt = 1;
3317 goto out_encode;
3318 }
3319
3320
3321
3322
3323
3324 err = nfsd_cross_mnt(cd->rd_rqstp, &dentry, &exp);
3325 if (err) {
3326 nfserr = nfserrno(err);
3327 goto out_put;
3328 }
3329 nfserr = check_nfsd_access(exp, cd->rd_rqstp);
3330 if (nfserr)
3331 goto out_put;
3332
3333 }
3334out_encode:
3335 nfserr = nfsd4_encode_fattr(xdr, NULL, exp, dentry, cd->rd_bmval,
3336 cd->rd_rqstp, ignore_crossmnt);
3337out_put:
3338 dput(dentry);
3339 exp_put(exp);
3340 return nfserr;
3341}
3342
3343static __be32 *
3344nfsd4_encode_rdattr_error(struct xdr_stream *xdr, __be32 nfserr)
3345{
3346 __be32 *p;
3347
3348 p = xdr_reserve_space(xdr, 20);
3349 if (!p)
3350 return NULL;
3351 *p++ = htonl(2);
3352 *p++ = htonl(FATTR4_WORD0_RDATTR_ERROR);
3353 *p++ = htonl(0);
3354
3355 *p++ = htonl(4);
3356 *p++ = nfserr;
3357 return p;
3358}
3359
3360static int
3361nfsd4_encode_dirent(void *ccdv, const char *name, int namlen,
3362 loff_t offset, u64 ino, unsigned int d_type)
3363{
3364 struct readdir_cd *ccd = ccdv;
3365 struct nfsd4_readdir *cd = container_of(ccd, struct nfsd4_readdir, common);
3366 struct xdr_stream *xdr = cd->xdr;
3367 int start_offset = xdr->buf->len;
3368 int cookie_offset;
3369 u32 name_and_cookie;
3370 int entry_bytes;
3371 __be32 nfserr = nfserr_toosmall;
3372 __be64 wire_offset;
3373 __be32 *p;
3374
3375
3376 if (name && isdotent(name, namlen)) {
3377 cd->common.err = nfs_ok;
3378 return 0;
3379 }
3380
3381 if (cd->cookie_offset) {
3382 wire_offset = cpu_to_be64(offset);
3383 write_bytes_to_xdr_buf(xdr->buf, cd->cookie_offset,
3384 &wire_offset, 8);
3385 }
3386
3387 p = xdr_reserve_space(xdr, 4);
3388 if (!p)
3389 goto fail;
3390 *p++ = xdr_one;
3391 cookie_offset = xdr->buf->len;
3392 p = xdr_reserve_space(xdr, 3*4 + namlen);
3393 if (!p)
3394 goto fail;
3395 p = xdr_encode_hyper(p, NFS_OFFSET_MAX);
3396 p = xdr_encode_array(p, name, namlen);
3397
3398 nfserr = nfsd4_encode_dirent_fattr(xdr, cd, name, namlen);
3399 switch (nfserr) {
3400 case nfs_ok:
3401 break;
3402 case nfserr_resource:
3403 nfserr = nfserr_toosmall;
3404 goto fail;
3405 case nfserr_noent:
3406 xdr_truncate_encode(xdr, start_offset);
3407 goto skip_entry;
3408 default:
3409
3410
3411
3412
3413
3414
3415
3416 if (!(cd->rd_bmval[0] & FATTR4_WORD0_RDATTR_ERROR))
3417 goto fail;
3418 p = nfsd4_encode_rdattr_error(xdr, nfserr);
3419 if (p == NULL) {
3420 nfserr = nfserr_toosmall;
3421 goto fail;
3422 }
3423 }
3424 nfserr = nfserr_toosmall;
3425 entry_bytes = xdr->buf->len - start_offset;
3426 if (entry_bytes > cd->rd_maxcount)
3427 goto fail;
3428 cd->rd_maxcount -= entry_bytes;
3429
3430
3431
3432
3433 if (!cd->rd_dircount)
3434 goto fail;
3435 name_and_cookie = 4 + 4 * XDR_QUADLEN(namlen) + 8;
3436 if (name_and_cookie > cd->rd_dircount && cd->cookie_offset)
3437 goto fail;
3438 cd->rd_dircount -= min(cd->rd_dircount, name_and_cookie);
3439
3440 cd->cookie_offset = cookie_offset;
3441skip_entry:
3442 cd->common.err = nfs_ok;
3443 return 0;
3444fail:
3445 xdr_truncate_encode(xdr, start_offset);
3446 cd->common.err = nfserr;
3447 return -EINVAL;
3448}
3449
3450static __be32
3451nfsd4_encode_stateid(struct xdr_stream *xdr, stateid_t *sid)
3452{
3453 __be32 *p;
3454
3455 p = xdr_reserve_space(xdr, sizeof(stateid_t));
3456 if (!p)
3457 return nfserr_resource;
3458 *p++ = cpu_to_be32(sid->si_generation);
3459 p = xdr_encode_opaque_fixed(p, &sid->si_opaque,
3460 sizeof(stateid_opaque_t));
3461 return 0;
3462}
3463
3464static __be32
3465nfsd4_encode_access(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_access *access)
3466{
3467 struct xdr_stream *xdr = &resp->xdr;
3468 __be32 *p;
3469
3470 p = xdr_reserve_space(xdr, 8);
3471 if (!p)
3472 return nfserr_resource;
3473 *p++ = cpu_to_be32(access->ac_supported);
3474 *p++ = cpu_to_be32(access->ac_resp_access);
3475 return 0;
3476}
3477
3478static __be32 nfsd4_encode_bind_conn_to_session(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_bind_conn_to_session *bcts)
3479{
3480 struct xdr_stream *xdr = &resp->xdr;
3481 __be32 *p;
3482
3483 p = xdr_reserve_space(xdr, NFS4_MAX_SESSIONID_LEN + 8);
3484 if (!p)
3485 return nfserr_resource;
3486 p = xdr_encode_opaque_fixed(p, bcts->sessionid.data,
3487 NFS4_MAX_SESSIONID_LEN);
3488 *p++ = cpu_to_be32(bcts->dir);
3489
3490 *p++ = cpu_to_be32(0);
3491 return 0;
3492}
3493
3494static __be32
3495nfsd4_encode_close(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_close *close)
3496{
3497 struct xdr_stream *xdr = &resp->xdr;
3498
3499 return nfsd4_encode_stateid(xdr, &close->cl_stateid);
3500}
3501
3502
3503static __be32
3504nfsd4_encode_commit(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_commit *commit)
3505{
3506 struct xdr_stream *xdr = &resp->xdr;
3507 __be32 *p;
3508
3509 p = xdr_reserve_space(xdr, NFS4_VERIFIER_SIZE);
3510 if (!p)
3511 return nfserr_resource;
3512 p = xdr_encode_opaque_fixed(p, commit->co_verf.data,
3513 NFS4_VERIFIER_SIZE);
3514 return 0;
3515}
3516
3517static __be32
3518nfsd4_encode_create(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_create *create)
3519{
3520 struct xdr_stream *xdr = &resp->xdr;
3521 __be32 *p;
3522
3523 p = xdr_reserve_space(xdr, 20);
3524 if (!p)
3525 return nfserr_resource;
3526 encode_cinfo(p, &create->cr_cinfo);
3527 return nfsd4_encode_bitmap(xdr, create->cr_bmval[0],
3528 create->cr_bmval[1], create->cr_bmval[2]);
3529}
3530
3531static __be32
3532nfsd4_encode_getattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_getattr *getattr)
3533{
3534 struct svc_fh *fhp = getattr->ga_fhp;
3535 struct xdr_stream *xdr = &resp->xdr;
3536
3537 return nfsd4_encode_fattr(xdr, fhp, fhp->fh_export, fhp->fh_dentry,
3538 getattr->ga_bmval, resp->rqstp, 0);
3539}
3540
3541static __be32
3542nfsd4_encode_getfh(struct nfsd4_compoundres *resp, __be32 nfserr, struct svc_fh **fhpp)
3543{
3544 struct xdr_stream *xdr = &resp->xdr;
3545 struct svc_fh *fhp = *fhpp;
3546 unsigned int len;
3547 __be32 *p;
3548
3549 len = fhp->fh_handle.fh_size;
3550 p = xdr_reserve_space(xdr, len + 4);
3551 if (!p)
3552 return nfserr_resource;
3553 p = xdr_encode_opaque(p, &fhp->fh_handle.fh_base, len);
3554 return 0;
3555}
3556
3557
3558
3559
3560
3561static __be32
3562nfsd4_encode_lock_denied(struct xdr_stream *xdr, struct nfsd4_lock_denied *ld)
3563{
3564 struct xdr_netobj *conf = &ld->ld_owner;
3565 __be32 *p;
3566
3567again:
3568 p = xdr_reserve_space(xdr, 32 + XDR_LEN(conf->len));
3569 if (!p) {
3570
3571
3572
3573
3574 if (conf->len) {
3575 kfree(conf->data);
3576 conf->len = 0;
3577 conf->data = NULL;
3578 goto again;
3579 }
3580 return nfserr_resource;
3581 }
3582 p = xdr_encode_hyper(p, ld->ld_start);
3583 p = xdr_encode_hyper(p, ld->ld_length);
3584 *p++ = cpu_to_be32(ld->ld_type);
3585 if (conf->len) {
3586 p = xdr_encode_opaque_fixed(p, &ld->ld_clientid, 8);
3587 p = xdr_encode_opaque(p, conf->data, conf->len);
3588 kfree(conf->data);
3589 } else {
3590 p = xdr_encode_hyper(p, (u64)0);
3591 *p++ = cpu_to_be32(0);
3592 }
3593 return nfserr_denied;
3594}
3595
3596static __be32
3597nfsd4_encode_lock(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lock *lock)
3598{
3599 struct xdr_stream *xdr = &resp->xdr;
3600
3601 if (!nfserr)
3602 nfserr = nfsd4_encode_stateid(xdr, &lock->lk_resp_stateid);
3603 else if (nfserr == nfserr_denied)
3604 nfserr = nfsd4_encode_lock_denied(xdr, &lock->lk_denied);
3605
3606 return nfserr;
3607}
3608
3609static __be32
3610nfsd4_encode_lockt(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lockt *lockt)
3611{
3612 struct xdr_stream *xdr = &resp->xdr;
3613
3614 if (nfserr == nfserr_denied)
3615 nfsd4_encode_lock_denied(xdr, &lockt->lt_denied);
3616 return nfserr;
3617}
3618
3619static __be32
3620nfsd4_encode_locku(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_locku *locku)
3621{
3622 struct xdr_stream *xdr = &resp->xdr;
3623
3624 return nfsd4_encode_stateid(xdr, &locku->lu_stateid);
3625}
3626
3627
3628static __be32
3629nfsd4_encode_link(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_link *link)
3630{
3631 struct xdr_stream *xdr = &resp->xdr;
3632 __be32 *p;
3633
3634 p = xdr_reserve_space(xdr, 20);
3635 if (!p)
3636 return nfserr_resource;
3637 p = encode_cinfo(p, &link->li_cinfo);
3638 return 0;
3639}
3640
3641
3642static __be32
3643nfsd4_encode_open(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open *open)
3644{
3645 struct xdr_stream *xdr = &resp->xdr;
3646 __be32 *p;
3647
3648 nfserr = nfsd4_encode_stateid(xdr, &open->op_stateid);
3649 if (nfserr)
3650 return nfserr;
3651 p = xdr_reserve_space(xdr, 24);
3652 if (!p)
3653 return nfserr_resource;
3654 p = encode_cinfo(p, &open->op_cinfo);
3655 *p++ = cpu_to_be32(open->op_rflags);
3656
3657 nfserr = nfsd4_encode_bitmap(xdr, open->op_bmval[0], open->op_bmval[1],
3658 open->op_bmval[2]);
3659 if (nfserr)
3660 return nfserr;
3661
3662 p = xdr_reserve_space(xdr, 4);
3663 if (!p)
3664 return nfserr_resource;
3665
3666 *p++ = cpu_to_be32(open->op_delegate_type);
3667 switch (open->op_delegate_type) {
3668 case NFS4_OPEN_DELEGATE_NONE:
3669 break;
3670 case NFS4_OPEN_DELEGATE_READ:
3671 nfserr = nfsd4_encode_stateid(xdr, &open->op_delegate_stateid);
3672 if (nfserr)
3673 return nfserr;
3674 p = xdr_reserve_space(xdr, 20);
3675 if (!p)
3676 return nfserr_resource;
3677 *p++ = cpu_to_be32(open->op_recall);
3678
3679
3680
3681
3682 *p++ = cpu_to_be32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
3683 *p++ = cpu_to_be32(0);
3684 *p++ = cpu_to_be32(0);
3685 *p++ = cpu_to_be32(0);
3686 break;
3687 case NFS4_OPEN_DELEGATE_WRITE:
3688 nfserr = nfsd4_encode_stateid(xdr, &open->op_delegate_stateid);
3689 if (nfserr)
3690 return nfserr;
3691 p = xdr_reserve_space(xdr, 32);
3692 if (!p)
3693 return nfserr_resource;
3694 *p++ = cpu_to_be32(0);
3695
3696
3697
3698
3699 *p++ = cpu_to_be32(NFS4_LIMIT_SIZE);
3700 *p++ = cpu_to_be32(~(u32)0);
3701 *p++ = cpu_to_be32(~(u32)0);
3702
3703
3704
3705
3706 *p++ = cpu_to_be32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
3707 *p++ = cpu_to_be32(0);
3708 *p++ = cpu_to_be32(0);
3709 *p++ = cpu_to_be32(0);
3710 break;
3711 case NFS4_OPEN_DELEGATE_NONE_EXT:
3712 switch (open->op_why_no_deleg) {
3713 case WND4_CONTENTION:
3714 case WND4_RESOURCE:
3715 p = xdr_reserve_space(xdr, 8);
3716 if (!p)
3717 return nfserr_resource;
3718 *p++ = cpu_to_be32(open->op_why_no_deleg);
3719
3720 *p++ = cpu_to_be32(0);
3721 break;
3722 default:
3723 p = xdr_reserve_space(xdr, 4);
3724 if (!p)
3725 return nfserr_resource;
3726 *p++ = cpu_to_be32(open->op_why_no_deleg);
3727 }
3728 break;
3729 default:
3730 BUG();
3731 }
3732
3733 return 0;
3734}
3735
3736static __be32
3737nfsd4_encode_open_confirm(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_confirm *oc)
3738{
3739 struct xdr_stream *xdr = &resp->xdr;
3740
3741 return nfsd4_encode_stateid(xdr, &oc->oc_resp_stateid);
3742}
3743
3744static __be32
3745nfsd4_encode_open_downgrade(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_downgrade *od)
3746{
3747 struct xdr_stream *xdr = &resp->xdr;
3748
3749 return nfsd4_encode_stateid(xdr, &od->od_stateid);
3750}
3751
3752static __be32 nfsd4_encode_splice_read(
3753 struct nfsd4_compoundres *resp,
3754 struct nfsd4_read *read,
3755 struct file *file, unsigned long maxcount)
3756{
3757 struct xdr_stream *xdr = &resp->xdr;
3758 struct xdr_buf *buf = xdr->buf;
3759 u32 eof;
3760 int space_left;
3761 __be32 nfserr;
3762 __be32 *p = xdr->p - 2;
3763
3764
3765 if (xdr->end - xdr->p < 1)
3766 return nfserr_resource;
3767
3768 nfserr = nfsd_splice_read(read->rd_rqstp, read->rd_fhp,
3769 file, read->rd_offset, &maxcount, &eof);
3770 read->rd_length = maxcount;
3771 if (nfserr) {
3772
3773
3774
3775
3776
3777 buf->page_len = 0;
3778 return nfserr;
3779 }
3780
3781 *(p++) = htonl(eof);
3782 *(p++) = htonl(maxcount);
3783
3784 buf->page_len = maxcount;
3785 buf->len += maxcount;
3786 xdr->page_ptr += (buf->page_base + maxcount + PAGE_SIZE - 1)
3787 / PAGE_SIZE;
3788
3789
3790 buf->tail[0].iov_base = xdr->p;
3791 buf->tail[0].iov_len = 0;
3792 xdr->iov = buf->tail;
3793 if (maxcount&3) {
3794 int pad = 4 - (maxcount&3);
3795
3796 *(xdr->p++) = 0;
3797
3798 buf->tail[0].iov_base += maxcount&3;
3799 buf->tail[0].iov_len = pad;
3800 buf->len += pad;
3801 }
3802
3803 space_left = min_t(int, (void *)xdr->end - (void *)xdr->p,
3804 buf->buflen - buf->len);
3805 buf->buflen = buf->len + space_left;
3806 xdr->end = (__be32 *)((void *)xdr->end + space_left);
3807
3808 return 0;
3809}
3810
3811static __be32 nfsd4_encode_readv(struct nfsd4_compoundres *resp,
3812 struct nfsd4_read *read,
3813 struct file *file, unsigned long maxcount)
3814{
3815 struct xdr_stream *xdr = &resp->xdr;
3816 u32 eof;
3817 int v;
3818 int starting_len = xdr->buf->len - 8;
3819 long len;
3820 int thislen;
3821 __be32 nfserr;
3822 __be32 tmp;
3823 __be32 *p;
3824 int pad;
3825
3826
3827
3828
3829
3830 if (xdr->iov == xdr->buf->head) {
3831 xdr->iov = NULL;
3832 xdr->end = xdr->p;
3833 }
3834
3835 len = maxcount;
3836 v = 0;
3837 while (len) {
3838 thislen = min_t(long, len, PAGE_SIZE);
3839 p = xdr_reserve_space(xdr, thislen);
3840 WARN_ON_ONCE(!p);
3841 resp->rqstp->rq_vec[v].iov_base = p;
3842 resp->rqstp->rq_vec[v].iov_len = thislen;
3843 v++;
3844 len -= thislen;
3845 }
3846 read->rd_vlen = v;
3847
3848 nfserr = nfsd_readv(resp->rqstp, read->rd_fhp, file, read->rd_offset,
3849 resp->rqstp->rq_vec, read->rd_vlen, &maxcount,
3850 &eof);
3851 read->rd_length = maxcount;
3852 if (nfserr)
3853 return nfserr;
3854 if (svc_encode_read_payload(resp->rqstp, starting_len + 8, maxcount))
3855 return nfserr_io;
3856 xdr_truncate_encode(xdr, starting_len + 8 + xdr_align_size(maxcount));
3857
3858 tmp = htonl(eof);
3859 write_bytes_to_xdr_buf(xdr->buf, starting_len , &tmp, 4);
3860 tmp = htonl(maxcount);
3861 write_bytes_to_xdr_buf(xdr->buf, starting_len + 4, &tmp, 4);
3862
3863 tmp = xdr_zero;
3864 pad = (maxcount&3) ? 4 - (maxcount&3) : 0;
3865 write_bytes_to_xdr_buf(xdr->buf, starting_len + 8 + maxcount,
3866 &tmp, pad);
3867 return 0;
3868
3869}
3870
3871static __be32
3872nfsd4_encode_read(struct nfsd4_compoundres *resp, __be32 nfserr,
3873 struct nfsd4_read *read)
3874{
3875 unsigned long maxcount;
3876 struct xdr_stream *xdr = &resp->xdr;
3877 struct file *file;
3878 int starting_len = xdr->buf->len;
3879 __be32 *p;
3880
3881 if (nfserr)
3882 return nfserr;
3883 file = read->rd_nf->nf_file;
3884
3885 p = xdr_reserve_space(xdr, 8);
3886 if (!p) {
3887 WARN_ON_ONCE(test_bit(RQ_SPLICE_OK, &resp->rqstp->rq_flags));
3888 return nfserr_resource;
3889 }
3890 if (resp->xdr.buf->page_len &&
3891 test_bit(RQ_SPLICE_OK, &resp->rqstp->rq_flags)) {
3892 WARN_ON_ONCE(1);
3893 return nfserr_resource;
3894 }
3895 xdr_commit_encode(xdr);
3896
3897 maxcount = svc_max_payload(resp->rqstp);
3898 maxcount = min_t(unsigned long, maxcount,
3899 (xdr->buf->buflen - xdr->buf->len));
3900 maxcount = min_t(unsigned long, maxcount, read->rd_length);
3901
3902 if (file->f_op->splice_read &&
3903 test_bit(RQ_SPLICE_OK, &resp->rqstp->rq_flags))
3904 nfserr = nfsd4_encode_splice_read(resp, read, file, maxcount);
3905 else
3906 nfserr = nfsd4_encode_readv(resp, read, file, maxcount);
3907
3908 if (nfserr)
3909 xdr_truncate_encode(xdr, starting_len);
3910
3911 return nfserr;
3912}
3913
3914static __be32
3915nfsd4_encode_readlink(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readlink *readlink)
3916{
3917 int maxcount;
3918 __be32 wire_count;
3919 int zero = 0;
3920 struct xdr_stream *xdr = &resp->xdr;
3921 int length_offset = xdr->buf->len;
3922 __be32 *p;
3923
3924 p = xdr_reserve_space(xdr, 4);
3925 if (!p)
3926 return nfserr_resource;
3927 maxcount = PAGE_SIZE;
3928
3929 p = xdr_reserve_space(xdr, maxcount);
3930 if (!p)
3931 return nfserr_resource;
3932
3933
3934
3935
3936
3937
3938 nfserr = nfsd_readlink(readlink->rl_rqstp, readlink->rl_fhp,
3939 (char *)p, &maxcount);
3940 if (nfserr == nfserr_isdir)
3941 nfserr = nfserr_inval;
3942 if (nfserr) {
3943 xdr_truncate_encode(xdr, length_offset);
3944 return nfserr;
3945 }
3946
3947 wire_count = htonl(maxcount);
3948 write_bytes_to_xdr_buf(xdr->buf, length_offset, &wire_count, 4);
3949 xdr_truncate_encode(xdr, length_offset + 4 + ALIGN(maxcount, 4));
3950 if (maxcount & 3)
3951 write_bytes_to_xdr_buf(xdr->buf, length_offset + 4 + maxcount,
3952 &zero, 4 - (maxcount&3));
3953 return 0;
3954}
3955
3956static __be32
3957nfsd4_encode_readdir(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readdir *readdir)
3958{
3959 int maxcount;
3960 int bytes_left;
3961 loff_t offset;
3962 __be64 wire_offset;
3963 struct xdr_stream *xdr = &resp->xdr;
3964 int starting_len = xdr->buf->len;
3965 __be32 *p;
3966
3967 p = xdr_reserve_space(xdr, NFS4_VERIFIER_SIZE);
3968 if (!p)
3969 return nfserr_resource;
3970
3971
3972 *p++ = cpu_to_be32(0);
3973 *p++ = cpu_to_be32(0);
3974 resp->xdr.buf->head[0].iov_len = ((char *)resp->xdr.p)
3975 - (char *)resp->xdr.buf->head[0].iov_base;
3976
3977
3978
3979
3980
3981 bytes_left = xdr->buf->buflen - xdr->buf->len
3982 - COMPOUND_ERR_SLACK_SPACE - 8;
3983 if (bytes_left < 0) {
3984 nfserr = nfserr_resource;
3985 goto err_no_verf;
3986 }
3987 maxcount = svc_max_payload(resp->rqstp);
3988 maxcount = min_t(u32, readdir->rd_maxcount, maxcount);
3989
3990
3991
3992
3993
3994 if (maxcount < 16) {
3995 nfserr = nfserr_toosmall;
3996 goto err_no_verf;
3997 }
3998 maxcount = min_t(int, maxcount-16, bytes_left);
3999
4000
4001 if (!readdir->rd_dircount)
4002 readdir->rd_dircount = svc_max_payload(resp->rqstp);
4003
4004 readdir->xdr = xdr;
4005 readdir->rd_maxcount = maxcount;
4006 readdir->common.err = 0;
4007 readdir->cookie_offset = 0;
4008
4009 offset = readdir->rd_cookie;
4010 nfserr = nfsd_readdir(readdir->rd_rqstp, readdir->rd_fhp,
4011 &offset,
4012 &readdir->common, nfsd4_encode_dirent);
4013 if (nfserr == nfs_ok &&
4014 readdir->common.err == nfserr_toosmall &&
4015 xdr->buf->len == starting_len + 8) {
4016
4017 if (maxcount - 16 < bytes_left)
4018
4019 nfserr = nfserr_toosmall;
4020 else
4021
4022 nfserr = nfserr_resource;
4023 }
4024 if (nfserr)
4025 goto err_no_verf;
4026
4027 if (readdir->cookie_offset) {
4028 wire_offset = cpu_to_be64(offset);
4029 write_bytes_to_xdr_buf(xdr->buf, readdir->cookie_offset,
4030 &wire_offset, 8);
4031 }
4032
4033 p = xdr_reserve_space(xdr, 8);
4034 if (!p) {
4035 WARN_ON_ONCE(1);
4036 goto err_no_verf;
4037 }
4038 *p++ = 0;
4039 *p++ = htonl(readdir->common.err == nfserr_eof);
4040
4041 return 0;
4042err_no_verf:
4043 xdr_truncate_encode(xdr, starting_len);
4044 return nfserr;
4045}
4046
4047static __be32
4048nfsd4_encode_remove(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_remove *remove)
4049{
4050 struct xdr_stream *xdr = &resp->xdr;
4051 __be32 *p;
4052
4053 p = xdr_reserve_space(xdr, 20);
4054 if (!p)
4055 return nfserr_resource;
4056 p = encode_cinfo(p, &remove->rm_cinfo);
4057 return 0;
4058}
4059
4060static __be32
4061nfsd4_encode_rename(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_rename *rename)
4062{
4063 struct xdr_stream *xdr = &resp->xdr;
4064 __be32 *p;
4065
4066 p = xdr_reserve_space(xdr, 40);
4067 if (!p)
4068 return nfserr_resource;
4069 p = encode_cinfo(p, &rename->rn_sinfo);
4070 p = encode_cinfo(p, &rename->rn_tinfo);
4071 return 0;
4072}
4073
4074static __be32
4075nfsd4_do_encode_secinfo(struct xdr_stream *xdr, struct svc_export *exp)
4076{
4077 u32 i, nflavs, supported;
4078 struct exp_flavor_info *flavs;
4079 struct exp_flavor_info def_flavs[2];
4080 __be32 *p, *flavorsp;
4081 static bool report = true;
4082
4083 if (exp->ex_nflavors) {
4084 flavs = exp->ex_flavors;
4085 nflavs = exp->ex_nflavors;
4086 } else {
4087 flavs = def_flavs;
4088 if (exp->ex_client->flavour->flavour == RPC_AUTH_UNIX) {
4089 nflavs = 2;
4090 flavs[0].pseudoflavor = RPC_AUTH_UNIX;
4091 flavs[1].pseudoflavor = RPC_AUTH_NULL;
4092 } else if (exp->ex_client->flavour->flavour == RPC_AUTH_GSS) {
4093 nflavs = 1;
4094 flavs[0].pseudoflavor
4095 = svcauth_gss_flavor(exp->ex_client);
4096 } else {
4097 nflavs = 1;
4098 flavs[0].pseudoflavor
4099 = exp->ex_client->flavour->flavour;
4100 }
4101 }
4102
4103 supported = 0;
4104 p = xdr_reserve_space(xdr, 4);
4105 if (!p)
4106 return nfserr_resource;
4107 flavorsp = p++;
4108
4109 for (i = 0; i < nflavs; i++) {
4110 rpc_authflavor_t pf = flavs[i].pseudoflavor;
4111 struct rpcsec_gss_info info;
4112
4113 if (rpcauth_get_gssinfo(pf, &info) == 0) {
4114 supported++;
4115 p = xdr_reserve_space(xdr, 4 + 4 +
4116 XDR_LEN(info.oid.len) + 4 + 4);
4117 if (!p)
4118 return nfserr_resource;
4119 *p++ = cpu_to_be32(RPC_AUTH_GSS);
4120 p = xdr_encode_opaque(p, info.oid.data, info.oid.len);
4121 *p++ = cpu_to_be32(info.qop);
4122 *p++ = cpu_to_be32(info.service);
4123 } else if (pf < RPC_AUTH_MAXFLAVOR) {
4124 supported++;
4125 p = xdr_reserve_space(xdr, 4);
4126 if (!p)
4127 return nfserr_resource;
4128 *p++ = cpu_to_be32(pf);
4129 } else {
4130 if (report)
4131 pr_warn("NFS: SECINFO: security flavor %u "
4132 "is not supported\n", pf);
4133 }
4134 }
4135
4136 if (nflavs != supported)
4137 report = false;
4138 *flavorsp = htonl(supported);
4139 return 0;
4140}
4141
4142static __be32
4143nfsd4_encode_secinfo(struct nfsd4_compoundres *resp, __be32 nfserr,
4144 struct nfsd4_secinfo *secinfo)
4145{
4146 struct xdr_stream *xdr = &resp->xdr;
4147
4148 return nfsd4_do_encode_secinfo(xdr, secinfo->si_exp);
4149}
4150
4151static __be32
4152nfsd4_encode_secinfo_no_name(struct nfsd4_compoundres *resp, __be32 nfserr,
4153 struct nfsd4_secinfo_no_name *secinfo)
4154{
4155 struct xdr_stream *xdr = &resp->xdr;
4156
4157 return nfsd4_do_encode_secinfo(xdr, secinfo->sin_exp);
4158}
4159
4160
4161
4162
4163
4164static __be32
4165nfsd4_encode_setattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setattr *setattr)
4166{
4167 struct xdr_stream *xdr = &resp->xdr;
4168 __be32 *p;
4169
4170 p = xdr_reserve_space(xdr, 16);
4171 if (!p)
4172 return nfserr_resource;
4173 if (nfserr) {
4174 *p++ = cpu_to_be32(3);
4175 *p++ = cpu_to_be32(0);
4176 *p++ = cpu_to_be32(0);
4177 *p++ = cpu_to_be32(0);
4178 }
4179 else {
4180 *p++ = cpu_to_be32(3);
4181 *p++ = cpu_to_be32(setattr->sa_bmval[0]);
4182 *p++ = cpu_to_be32(setattr->sa_bmval[1]);
4183 *p++ = cpu_to_be32(setattr->sa_bmval[2]);
4184 }
4185 return nfserr;
4186}
4187
4188static __be32
4189nfsd4_encode_setclientid(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setclientid *scd)
4190{
4191 struct xdr_stream *xdr = &resp->xdr;
4192 __be32 *p;
4193
4194 if (!nfserr) {
4195 p = xdr_reserve_space(xdr, 8 + NFS4_VERIFIER_SIZE);
4196 if (!p)
4197 return nfserr_resource;
4198 p = xdr_encode_opaque_fixed(p, &scd->se_clientid, 8);
4199 p = xdr_encode_opaque_fixed(p, &scd->se_confirm,
4200 NFS4_VERIFIER_SIZE);
4201 }
4202 else if (nfserr == nfserr_clid_inuse) {
4203 p = xdr_reserve_space(xdr, 8);
4204 if (!p)
4205 return nfserr_resource;
4206 *p++ = cpu_to_be32(0);
4207 *p++ = cpu_to_be32(0);
4208 }
4209 return nfserr;
4210}
4211
4212static __be32
4213nfsd4_encode_write(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_write *write)
4214{
4215 struct xdr_stream *xdr = &resp->xdr;
4216 __be32 *p;
4217
4218 p = xdr_reserve_space(xdr, 16);
4219 if (!p)
4220 return nfserr_resource;
4221 *p++ = cpu_to_be32(write->wr_bytes_written);
4222 *p++ = cpu_to_be32(write->wr_how_written);
4223 p = xdr_encode_opaque_fixed(p, write->wr_verifier.data,
4224 NFS4_VERIFIER_SIZE);
4225 return 0;
4226}
4227
4228static __be32
4229nfsd4_encode_exchange_id(struct nfsd4_compoundres *resp, __be32 nfserr,
4230 struct nfsd4_exchange_id *exid)
4231{
4232 struct xdr_stream *xdr = &resp->xdr;
4233 __be32 *p;
4234 char *major_id;
4235 char *server_scope;
4236 int major_id_sz;
4237 int server_scope_sz;
4238 uint64_t minor_id = 0;
4239 struct nfsd_net *nn = net_generic(SVC_NET(resp->rqstp), nfsd_net_id);
4240
4241 major_id = nn->nfsd_name;
4242 major_id_sz = strlen(nn->nfsd_name);
4243 server_scope = nn->nfsd_name;
4244 server_scope_sz = strlen(nn->nfsd_name);
4245
4246 p = xdr_reserve_space(xdr,
4247 8 +
4248 4 +
4249 4 +
4250 4 );
4251 if (!p)
4252 return nfserr_resource;
4253
4254 p = xdr_encode_opaque_fixed(p, &exid->clientid, 8);
4255 *p++ = cpu_to_be32(exid->seqid);
4256 *p++ = cpu_to_be32(exid->flags);
4257
4258 *p++ = cpu_to_be32(exid->spa_how);
4259
4260 switch (exid->spa_how) {
4261 case SP4_NONE:
4262 break;
4263 case SP4_MACH_CRED:
4264
4265 nfserr = nfsd4_encode_bitmap(xdr,
4266 exid->spo_must_enforce[0],
4267 exid->spo_must_enforce[1],
4268 exid->spo_must_enforce[2]);
4269 if (nfserr)
4270 return nfserr;
4271
4272 nfserr = nfsd4_encode_bitmap(xdr,
4273 exid->spo_must_allow[0],
4274 exid->spo_must_allow[1],
4275 exid->spo_must_allow[2]);
4276 if (nfserr)
4277 return nfserr;
4278 break;
4279 default:
4280 WARN_ON_ONCE(1);
4281 }
4282
4283 p = xdr_reserve_space(xdr,
4284 8 +
4285 4 +
4286 (XDR_QUADLEN(major_id_sz) * 4) +
4287 4 +
4288 (XDR_QUADLEN(server_scope_sz) * 4) +
4289 4 );
4290 if (!p)
4291 return nfserr_resource;
4292
4293
4294 p = xdr_encode_hyper(p, minor_id);
4295
4296 p = xdr_encode_opaque(p, major_id, major_id_sz);
4297
4298
4299 p = xdr_encode_opaque(p, server_scope, server_scope_sz);
4300
4301
4302 *p++ = cpu_to_be32(0);
4303 return 0;
4304}
4305
4306static __be32
4307nfsd4_encode_create_session(struct nfsd4_compoundres *resp, __be32 nfserr,
4308 struct nfsd4_create_session *sess)
4309{
4310 struct xdr_stream *xdr = &resp->xdr;
4311 __be32 *p;
4312
4313 p = xdr_reserve_space(xdr, 24);
4314 if (!p)
4315 return nfserr_resource;
4316 p = xdr_encode_opaque_fixed(p, sess->sessionid.data,
4317 NFS4_MAX_SESSIONID_LEN);
4318 *p++ = cpu_to_be32(sess->seqid);
4319 *p++ = cpu_to_be32(sess->flags);
4320
4321 p = xdr_reserve_space(xdr, 28);
4322 if (!p)
4323 return nfserr_resource;
4324 *p++ = cpu_to_be32(0);
4325 *p++ = cpu_to_be32(sess->fore_channel.maxreq_sz);
4326 *p++ = cpu_to_be32(sess->fore_channel.maxresp_sz);
4327 *p++ = cpu_to_be32(sess->fore_channel.maxresp_cached);
4328 *p++ = cpu_to_be32(sess->fore_channel.maxops);
4329 *p++ = cpu_to_be32(sess->fore_channel.maxreqs);
4330 *p++ = cpu_to_be32(sess->fore_channel.nr_rdma_attrs);
4331
4332 if (sess->fore_channel.nr_rdma_attrs) {
4333 p = xdr_reserve_space(xdr, 4);
4334 if (!p)
4335 return nfserr_resource;
4336 *p++ = cpu_to_be32(sess->fore_channel.rdma_attrs);
4337 }
4338
4339 p = xdr_reserve_space(xdr, 28);
4340 if (!p)
4341 return nfserr_resource;
4342 *p++ = cpu_to_be32(0);
4343 *p++ = cpu_to_be32(sess->back_channel.maxreq_sz);
4344 *p++ = cpu_to_be32(sess->back_channel.maxresp_sz);
4345 *p++ = cpu_to_be32(sess->back_channel.maxresp_cached);
4346 *p++ = cpu_to_be32(sess->back_channel.maxops);
4347 *p++ = cpu_to_be32(sess->back_channel.maxreqs);
4348 *p++ = cpu_to_be32(sess->back_channel.nr_rdma_attrs);
4349
4350 if (sess->back_channel.nr_rdma_attrs) {
4351 p = xdr_reserve_space(xdr, 4);
4352 if (!p)
4353 return nfserr_resource;
4354 *p++ = cpu_to_be32(sess->back_channel.rdma_attrs);
4355 }
4356 return 0;
4357}
4358
4359static __be32
4360nfsd4_encode_sequence(struct nfsd4_compoundres *resp, __be32 nfserr,
4361 struct nfsd4_sequence *seq)
4362{
4363 struct xdr_stream *xdr = &resp->xdr;
4364 __be32 *p;
4365
4366 p = xdr_reserve_space(xdr, NFS4_MAX_SESSIONID_LEN + 20);
4367 if (!p)
4368 return nfserr_resource;
4369 p = xdr_encode_opaque_fixed(p, seq->sessionid.data,
4370 NFS4_MAX_SESSIONID_LEN);
4371 *p++ = cpu_to_be32(seq->seqid);
4372 *p++ = cpu_to_be32(seq->slotid);
4373
4374 *p++ = cpu_to_be32(seq->maxslots - 1);
4375 *p++ = cpu_to_be32(seq->maxslots - 1);
4376 *p++ = cpu_to_be32(seq->status_flags);
4377
4378 resp->cstate.data_offset = xdr->buf->len;
4379 return 0;
4380}
4381
4382static __be32
4383nfsd4_encode_test_stateid(struct nfsd4_compoundres *resp, __be32 nfserr,
4384 struct nfsd4_test_stateid *test_stateid)
4385{
4386 struct xdr_stream *xdr = &resp->xdr;
4387 struct nfsd4_test_stateid_id *stateid, *next;
4388 __be32 *p;
4389
4390 p = xdr_reserve_space(xdr, 4 + (4 * test_stateid->ts_num_ids));
4391 if (!p)
4392 return nfserr_resource;
4393 *p++ = htonl(test_stateid->ts_num_ids);
4394
4395 list_for_each_entry_safe(stateid, next, &test_stateid->ts_stateid_list, ts_id_list) {
4396 *p++ = stateid->ts_id_status;
4397 }
4398
4399 return 0;
4400}
4401
4402#ifdef CONFIG_NFSD_PNFS
4403static __be32
4404nfsd4_encode_getdeviceinfo(struct nfsd4_compoundres *resp, __be32 nfserr,
4405 struct nfsd4_getdeviceinfo *gdev)
4406{
4407 struct xdr_stream *xdr = &resp->xdr;
4408 const struct nfsd4_layout_ops *ops;
4409 u32 starting_len = xdr->buf->len, needed_len;
4410 __be32 *p;
4411
4412 p = xdr_reserve_space(xdr, 4);
4413 if (!p)
4414 return nfserr_resource;
4415
4416 *p++ = cpu_to_be32(gdev->gd_layout_type);
4417
4418
4419 if (gdev->gd_maxcount != 0) {
4420 ops = nfsd4_layout_ops[gdev->gd_layout_type];
4421 nfserr = ops->encode_getdeviceinfo(xdr, gdev);
4422 if (nfserr) {
4423
4424
4425
4426
4427
4428 if (xdr->buf->len + 4 > gdev->gd_maxcount)
4429 goto toosmall;
4430 return nfserr;
4431 }
4432 }
4433
4434 if (gdev->gd_notify_types) {
4435 p = xdr_reserve_space(xdr, 4 + 4);
4436 if (!p)
4437 return nfserr_resource;
4438 *p++ = cpu_to_be32(1);
4439 *p++ = cpu_to_be32(gdev->gd_notify_types);
4440 } else {
4441 p = xdr_reserve_space(xdr, 4);
4442 if (!p)
4443 return nfserr_resource;
4444 *p++ = 0;
4445 }
4446
4447 return 0;
4448toosmall:
4449 dprintk("%s: maxcount too small\n", __func__);
4450 needed_len = xdr->buf->len + 4 ;
4451 xdr_truncate_encode(xdr, starting_len);
4452 p = xdr_reserve_space(xdr, 4);
4453 if (!p)
4454 return nfserr_resource;
4455 *p++ = cpu_to_be32(needed_len);
4456 return nfserr_toosmall;
4457}
4458
4459static __be32
4460nfsd4_encode_layoutget(struct nfsd4_compoundres *resp, __be32 nfserr,
4461 struct nfsd4_layoutget *lgp)
4462{
4463 struct xdr_stream *xdr = &resp->xdr;
4464 const struct nfsd4_layout_ops *ops;
4465 __be32 *p;
4466
4467 p = xdr_reserve_space(xdr, 36 + sizeof(stateid_opaque_t));
4468 if (!p)
4469 return nfserr_resource;
4470
4471 *p++ = cpu_to_be32(1);
4472 *p++ = cpu_to_be32(lgp->lg_sid.si_generation);
4473 p = xdr_encode_opaque_fixed(p, &lgp->lg_sid.si_opaque,
4474 sizeof(stateid_opaque_t));
4475
4476 *p++ = cpu_to_be32(1);
4477 p = xdr_encode_hyper(p, lgp->lg_seg.offset);
4478 p = xdr_encode_hyper(p, lgp->lg_seg.length);
4479 *p++ = cpu_to_be32(lgp->lg_seg.iomode);
4480 *p++ = cpu_to_be32(lgp->lg_layout_type);
4481
4482 ops = nfsd4_layout_ops[lgp->lg_layout_type];
4483 return ops->encode_layoutget(xdr, lgp);
4484}
4485
4486static __be32
4487nfsd4_encode_layoutcommit(struct nfsd4_compoundres *resp, __be32 nfserr,
4488 struct nfsd4_layoutcommit *lcp)
4489{
4490 struct xdr_stream *xdr = &resp->xdr;
4491 __be32 *p;
4492
4493 p = xdr_reserve_space(xdr, 4);
4494 if (!p)
4495 return nfserr_resource;
4496 *p++ = cpu_to_be32(lcp->lc_size_chg);
4497 if (lcp->lc_size_chg) {
4498 p = xdr_reserve_space(xdr, 8);
4499 if (!p)
4500 return nfserr_resource;
4501 p = xdr_encode_hyper(p, lcp->lc_newsize);
4502 }
4503
4504 return 0;
4505}
4506
4507static __be32
4508nfsd4_encode_layoutreturn(struct nfsd4_compoundres *resp, __be32 nfserr,
4509 struct nfsd4_layoutreturn *lrp)
4510{
4511 struct xdr_stream *xdr = &resp->xdr;
4512 __be32 *p;
4513
4514 p = xdr_reserve_space(xdr, 4);
4515 if (!p)
4516 return nfserr_resource;
4517 *p++ = cpu_to_be32(lrp->lrs_present);
4518 if (lrp->lrs_present)
4519 return nfsd4_encode_stateid(xdr, &lrp->lr_sid);
4520 return 0;
4521}
4522#endif
4523
4524static __be32
4525nfsd42_encode_write_res(struct nfsd4_compoundres *resp,
4526 struct nfsd42_write_res *write, bool sync)
4527{
4528 __be32 *p;
4529 p = xdr_reserve_space(&resp->xdr, 4);
4530 if (!p)
4531 return nfserr_resource;
4532
4533 if (sync)
4534 *p++ = cpu_to_be32(0);
4535 else {
4536 __be32 nfserr;
4537 *p++ = cpu_to_be32(1);
4538 nfserr = nfsd4_encode_stateid(&resp->xdr, &write->cb_stateid);
4539 if (nfserr)
4540 return nfserr;
4541 }
4542 p = xdr_reserve_space(&resp->xdr, 8 + 4 + NFS4_VERIFIER_SIZE);
4543 if (!p)
4544 return nfserr_resource;
4545
4546 p = xdr_encode_hyper(p, write->wr_bytes_written);
4547 *p++ = cpu_to_be32(write->wr_stable_how);
4548 p = xdr_encode_opaque_fixed(p, write->wr_verifier.data,
4549 NFS4_VERIFIER_SIZE);
4550 return nfs_ok;
4551}
4552
4553static __be32
4554nfsd42_encode_nl4_server(struct nfsd4_compoundres *resp, struct nl4_server *ns)
4555{
4556 struct xdr_stream *xdr = &resp->xdr;
4557 struct nfs42_netaddr *addr;
4558 __be32 *p;
4559
4560 p = xdr_reserve_space(xdr, 4);
4561 *p++ = cpu_to_be32(ns->nl4_type);
4562
4563 switch (ns->nl4_type) {
4564 case NL4_NETADDR:
4565 addr = &ns->u.nl4_addr;
4566
4567
4568
4569
4570 p = xdr_reserve_space(xdr,
4571 4 +
4572 (XDR_QUADLEN(addr->netid_len) * 4) +
4573 4 +
4574 (XDR_QUADLEN(addr->addr_len) * 4));
4575 if (!p)
4576 return nfserr_resource;
4577
4578 *p++ = cpu_to_be32(addr->netid_len);
4579 p = xdr_encode_opaque_fixed(p, addr->netid,
4580 addr->netid_len);
4581 *p++ = cpu_to_be32(addr->addr_len);
4582 p = xdr_encode_opaque_fixed(p, addr->addr,
4583 addr->addr_len);
4584 break;
4585 default:
4586 WARN_ON_ONCE(ns->nl4_type != NL4_NETADDR);
4587 return nfserr_inval;
4588 }
4589
4590 return 0;
4591}
4592
4593static __be32
4594nfsd4_encode_copy(struct nfsd4_compoundres *resp, __be32 nfserr,
4595 struct nfsd4_copy *copy)
4596{
4597 __be32 *p;
4598
4599 nfserr = nfsd42_encode_write_res(resp, ©->cp_res,
4600 copy->cp_synchronous);
4601 if (nfserr)
4602 return nfserr;
4603
4604 p = xdr_reserve_space(&resp->xdr, 4 + 4);
4605 *p++ = xdr_one;
4606 *p++ = cpu_to_be32(copy->cp_synchronous);
4607 return 0;
4608}
4609
4610static __be32
4611nfsd4_encode_offload_status(struct nfsd4_compoundres *resp, __be32 nfserr,
4612 struct nfsd4_offload_status *os)
4613{
4614 struct xdr_stream *xdr = &resp->xdr;
4615 __be32 *p;
4616
4617 p = xdr_reserve_space(xdr, 8 + 4);
4618 if (!p)
4619 return nfserr_resource;
4620 p = xdr_encode_hyper(p, os->count);
4621 *p++ = cpu_to_be32(0);
4622
4623 return nfserr;
4624}
4625
4626static __be32
4627nfsd4_encode_copy_notify(struct nfsd4_compoundres *resp, __be32 nfserr,
4628 struct nfsd4_copy_notify *cn)
4629{
4630 struct xdr_stream *xdr = &resp->xdr;
4631 __be32 *p;
4632
4633 if (nfserr)
4634 return nfserr;
4635
4636
4637 p = xdr_reserve_space(xdr, 12);
4638 if (!p)
4639 return nfserr_resource;
4640
4641
4642 p = xdr_encode_hyper(p, cn->cpn_sec);
4643 *p++ = cpu_to_be32(cn->cpn_nsec);
4644
4645
4646 nfserr = nfsd4_encode_stateid(xdr, &cn->cpn_cnr_stateid);
4647 if (nfserr)
4648 return nfserr;
4649
4650
4651 p = xdr_reserve_space(xdr, 4);
4652 if (!p)
4653 return nfserr_resource;
4654
4655 *p++ = cpu_to_be32(1);
4656
4657 return nfsd42_encode_nl4_server(resp, &cn->cpn_src);
4658}
4659
4660static __be32
4661nfsd4_encode_seek(struct nfsd4_compoundres *resp, __be32 nfserr,
4662 struct nfsd4_seek *seek)
4663{
4664 __be32 *p;
4665
4666 p = xdr_reserve_space(&resp->xdr, 4 + 8);
4667 *p++ = cpu_to_be32(seek->seek_eof);
4668 p = xdr_encode_hyper(p, seek->seek_pos);
4669
4670 return 0;
4671}
4672
4673static __be32
4674nfsd4_encode_noop(struct nfsd4_compoundres *resp, __be32 nfserr, void *p)
4675{
4676 return nfserr;
4677}
4678
4679
4680
4681
4682static int
4683nfsd4_vbuf_to_stream(struct xdr_stream *xdr, char *buf, u32 buflen)
4684{
4685 u32 cplen;
4686 __be32 *p;
4687
4688 cplen = min_t(unsigned long, buflen,
4689 ((void *)xdr->end - (void *)xdr->p));
4690 p = xdr_reserve_space(xdr, cplen);
4691 if (!p)
4692 return nfserr_resource;
4693
4694 memcpy(p, buf, cplen);
4695 buf += cplen;
4696 buflen -= cplen;
4697
4698 while (buflen) {
4699 cplen = min_t(u32, buflen, PAGE_SIZE);
4700 p = xdr_reserve_space(xdr, cplen);
4701 if (!p)
4702 return nfserr_resource;
4703
4704 memcpy(p, buf, cplen);
4705
4706 if (cplen < PAGE_SIZE) {
4707
4708
4709
4710
4711
4712 xdr_encode_opaque_fixed(p, NULL, cplen);
4713 break;
4714 }
4715
4716 buflen -= PAGE_SIZE;
4717 buf += PAGE_SIZE;
4718 }
4719
4720 return 0;
4721}
4722
4723static __be32
4724nfsd4_encode_getxattr(struct nfsd4_compoundres *resp, __be32 nfserr,
4725 struct nfsd4_getxattr *getxattr)
4726{
4727 struct xdr_stream *xdr = &resp->xdr;
4728 __be32 *p, err;
4729
4730 p = xdr_reserve_space(xdr, 4);
4731 if (!p)
4732 return nfserr_resource;
4733
4734 *p = cpu_to_be32(getxattr->getxa_len);
4735
4736 if (getxattr->getxa_len == 0)
4737 return 0;
4738
4739 err = nfsd4_vbuf_to_stream(xdr, getxattr->getxa_buf,
4740 getxattr->getxa_len);
4741
4742 kvfree(getxattr->getxa_buf);
4743
4744 return err;
4745}
4746
4747static __be32
4748nfsd4_encode_setxattr(struct nfsd4_compoundres *resp, __be32 nfserr,
4749 struct nfsd4_setxattr *setxattr)
4750{
4751 struct xdr_stream *xdr = &resp->xdr;
4752 __be32 *p;
4753
4754 p = xdr_reserve_space(xdr, 20);
4755 if (!p)
4756 return nfserr_resource;
4757
4758 encode_cinfo(p, &setxattr->setxa_cinfo);
4759
4760 return 0;
4761}
4762
4763
4764
4765
4766static __be32
4767nfsd4_listxattr_validate_cookie(struct nfsd4_listxattrs *listxattrs,
4768 u32 *offsetp)
4769{
4770 u64 cookie = listxattrs->lsxa_cookie;
4771
4772
4773
4774
4775
4776
4777 if (cookie > (listxattrs->lsxa_len) / (XATTR_USER_PREFIX_LEN + 2))
4778 return nfserr_badcookie;
4779
4780 if (cookie > (listxattrs->lsxa_maxcount /
4781 (XDR_QUADLEN(XATTR_USER_PREFIX_LEN + 2) + 4)))
4782 return nfserr_badcookie;
4783
4784 *offsetp = (u32)cookie;
4785 return 0;
4786}
4787
4788static __be32
4789nfsd4_encode_listxattrs(struct nfsd4_compoundres *resp, __be32 nfserr,
4790 struct nfsd4_listxattrs *listxattrs)
4791{
4792 struct xdr_stream *xdr = &resp->xdr;
4793 u32 cookie_offset, count_offset, eof;
4794 u32 left, xdrleft, slen, count;
4795 u32 xdrlen, offset;
4796 u64 cookie;
4797 char *sp;
4798 __be32 status;
4799 __be32 *p;
4800 u32 nuser;
4801
4802 eof = 1;
4803
4804 status = nfsd4_listxattr_validate_cookie(listxattrs, &offset);
4805 if (status)
4806 goto out;
4807
4808
4809
4810
4811
4812 cookie_offset = xdr->buf->len;
4813 count_offset = cookie_offset + 8;
4814 p = xdr_reserve_space(xdr, 12);
4815 if (!p) {
4816 status = nfserr_resource;
4817 goto out;
4818 }
4819
4820 count = 0;
4821 left = listxattrs->lsxa_len;
4822 sp = listxattrs->lsxa_buf;
4823 nuser = 0;
4824
4825 xdrleft = listxattrs->lsxa_maxcount;
4826
4827 while (left > 0 && xdrleft > 0) {
4828 slen = strlen(sp);
4829
4830
4831
4832
4833 if (strncmp(sp, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN))
4834 goto contloop;
4835
4836 slen -= XATTR_USER_PREFIX_LEN;
4837 xdrlen = 4 + ((slen + 3) & ~3);
4838 if (xdrlen > xdrleft) {
4839 if (count == 0) {
4840
4841
4842
4843 status = nfserr_toosmall;
4844 goto out;
4845 }
4846 eof = 0;
4847 goto wreof;
4848 }
4849
4850 left -= XATTR_USER_PREFIX_LEN;
4851 sp += XATTR_USER_PREFIX_LEN;
4852 if (nuser++ < offset)
4853 goto contloop;
4854
4855
4856 p = xdr_reserve_space(xdr, xdrlen);
4857 if (!p) {
4858 status = nfserr_resource;
4859 goto out;
4860 }
4861
4862 p = xdr_encode_opaque(p, sp, slen);
4863
4864 xdrleft -= xdrlen;
4865 count++;
4866contloop:
4867 sp += slen + 1;
4868 left -= slen + 1;
4869 }
4870
4871
4872
4873
4874
4875 if (nuser > 0 && count == 0) {
4876 status = nfserr_badcookie;
4877 goto out;
4878 }
4879
4880wreof:
4881 p = xdr_reserve_space(xdr, 4);
4882 if (!p) {
4883 status = nfserr_resource;
4884 goto out;
4885 }
4886 *p = cpu_to_be32(eof);
4887
4888 cookie = offset + count;
4889
4890 write_bytes_to_xdr_buf(xdr->buf, cookie_offset, &cookie, 8);
4891 count = htonl(count);
4892 write_bytes_to_xdr_buf(xdr->buf, count_offset, &count, 4);
4893out:
4894 if (listxattrs->lsxa_len)
4895 kvfree(listxattrs->lsxa_buf);
4896 return status;
4897}
4898
4899static __be32
4900nfsd4_encode_removexattr(struct nfsd4_compoundres *resp, __be32 nfserr,
4901 struct nfsd4_removexattr *removexattr)
4902{
4903 struct xdr_stream *xdr = &resp->xdr;
4904 __be32 *p;
4905
4906 p = xdr_reserve_space(xdr, 20);
4907 if (!p)
4908 return nfserr_resource;
4909
4910 p = encode_cinfo(p, &removexattr->rmxa_cinfo);
4911 return 0;
4912}
4913
4914typedef __be32(* nfsd4_enc)(struct nfsd4_compoundres *, __be32, void *);
4915
4916
4917
4918
4919
4920
4921static const nfsd4_enc nfsd4_enc_ops[] = {
4922 [OP_ACCESS] = (nfsd4_enc)nfsd4_encode_access,
4923 [OP_CLOSE] = (nfsd4_enc)nfsd4_encode_close,
4924 [OP_COMMIT] = (nfsd4_enc)nfsd4_encode_commit,
4925 [OP_CREATE] = (nfsd4_enc)nfsd4_encode_create,
4926 [OP_DELEGPURGE] = (nfsd4_enc)nfsd4_encode_noop,
4927 [OP_DELEGRETURN] = (nfsd4_enc)nfsd4_encode_noop,
4928 [OP_GETATTR] = (nfsd4_enc)nfsd4_encode_getattr,
4929 [OP_GETFH] = (nfsd4_enc)nfsd4_encode_getfh,
4930 [OP_LINK] = (nfsd4_enc)nfsd4_encode_link,
4931 [OP_LOCK] = (nfsd4_enc)nfsd4_encode_lock,
4932 [OP_LOCKT] = (nfsd4_enc)nfsd4_encode_lockt,
4933 [OP_LOCKU] = (nfsd4_enc)nfsd4_encode_locku,
4934 [OP_LOOKUP] = (nfsd4_enc)nfsd4_encode_noop,
4935 [OP_LOOKUPP] = (nfsd4_enc)nfsd4_encode_noop,
4936 [OP_NVERIFY] = (nfsd4_enc)nfsd4_encode_noop,
4937 [OP_OPEN] = (nfsd4_enc)nfsd4_encode_open,
4938 [OP_OPENATTR] = (nfsd4_enc)nfsd4_encode_noop,
4939 [OP_OPEN_CONFIRM] = (nfsd4_enc)nfsd4_encode_open_confirm,
4940 [OP_OPEN_DOWNGRADE] = (nfsd4_enc)nfsd4_encode_open_downgrade,
4941 [OP_PUTFH] = (nfsd4_enc)nfsd4_encode_noop,
4942 [OP_PUTPUBFH] = (nfsd4_enc)nfsd4_encode_noop,
4943 [OP_PUTROOTFH] = (nfsd4_enc)nfsd4_encode_noop,
4944 [OP_READ] = (nfsd4_enc)nfsd4_encode_read,
4945 [OP_READDIR] = (nfsd4_enc)nfsd4_encode_readdir,
4946 [OP_READLINK] = (nfsd4_enc)nfsd4_encode_readlink,
4947 [OP_REMOVE] = (nfsd4_enc)nfsd4_encode_remove,
4948 [OP_RENAME] = (nfsd4_enc)nfsd4_encode_rename,
4949 [OP_RENEW] = (nfsd4_enc)nfsd4_encode_noop,
4950 [OP_RESTOREFH] = (nfsd4_enc)nfsd4_encode_noop,
4951 [OP_SAVEFH] = (nfsd4_enc)nfsd4_encode_noop,
4952 [OP_SECINFO] = (nfsd4_enc)nfsd4_encode_secinfo,
4953 [OP_SETATTR] = (nfsd4_enc)nfsd4_encode_setattr,
4954 [OP_SETCLIENTID] = (nfsd4_enc)nfsd4_encode_setclientid,
4955 [OP_SETCLIENTID_CONFIRM] = (nfsd4_enc)nfsd4_encode_noop,
4956 [OP_VERIFY] = (nfsd4_enc)nfsd4_encode_noop,
4957 [OP_WRITE] = (nfsd4_enc)nfsd4_encode_write,
4958 [OP_RELEASE_LOCKOWNER] = (nfsd4_enc)nfsd4_encode_noop,
4959
4960
4961 [OP_BACKCHANNEL_CTL] = (nfsd4_enc)nfsd4_encode_noop,
4962 [OP_BIND_CONN_TO_SESSION] = (nfsd4_enc)nfsd4_encode_bind_conn_to_session,
4963 [OP_EXCHANGE_ID] = (nfsd4_enc)nfsd4_encode_exchange_id,
4964 [OP_CREATE_SESSION] = (nfsd4_enc)nfsd4_encode_create_session,
4965 [OP_DESTROY_SESSION] = (nfsd4_enc)nfsd4_encode_noop,
4966 [OP_FREE_STATEID] = (nfsd4_enc)nfsd4_encode_noop,
4967 [OP_GET_DIR_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop,
4968#ifdef CONFIG_NFSD_PNFS
4969 [OP_GETDEVICEINFO] = (nfsd4_enc)nfsd4_encode_getdeviceinfo,
4970 [OP_GETDEVICELIST] = (nfsd4_enc)nfsd4_encode_noop,
4971 [OP_LAYOUTCOMMIT] = (nfsd4_enc)nfsd4_encode_layoutcommit,
4972 [OP_LAYOUTGET] = (nfsd4_enc)nfsd4_encode_layoutget,
4973 [OP_LAYOUTRETURN] = (nfsd4_enc)nfsd4_encode_layoutreturn,
4974#else
4975 [OP_GETDEVICEINFO] = (nfsd4_enc)nfsd4_encode_noop,
4976 [OP_GETDEVICELIST] = (nfsd4_enc)nfsd4_encode_noop,
4977 [OP_LAYOUTCOMMIT] = (nfsd4_enc)nfsd4_encode_noop,
4978 [OP_LAYOUTGET] = (nfsd4_enc)nfsd4_encode_noop,
4979 [OP_LAYOUTRETURN] = (nfsd4_enc)nfsd4_encode_noop,
4980#endif
4981 [OP_SECINFO_NO_NAME] = (nfsd4_enc)nfsd4_encode_secinfo_no_name,
4982 [OP_SEQUENCE] = (nfsd4_enc)nfsd4_encode_sequence,
4983 [OP_SET_SSV] = (nfsd4_enc)nfsd4_encode_noop,
4984 [OP_TEST_STATEID] = (nfsd4_enc)nfsd4_encode_test_stateid,
4985 [OP_WANT_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop,
4986 [OP_DESTROY_CLIENTID] = (nfsd4_enc)nfsd4_encode_noop,
4987 [OP_RECLAIM_COMPLETE] = (nfsd4_enc)nfsd4_encode_noop,
4988
4989
4990 [OP_ALLOCATE] = (nfsd4_enc)nfsd4_encode_noop,
4991 [OP_COPY] = (nfsd4_enc)nfsd4_encode_copy,
4992 [OP_COPY_NOTIFY] = (nfsd4_enc)nfsd4_encode_copy_notify,
4993 [OP_DEALLOCATE] = (nfsd4_enc)nfsd4_encode_noop,
4994 [OP_IO_ADVISE] = (nfsd4_enc)nfsd4_encode_noop,
4995 [OP_LAYOUTERROR] = (nfsd4_enc)nfsd4_encode_noop,
4996 [OP_LAYOUTSTATS] = (nfsd4_enc)nfsd4_encode_noop,
4997 [OP_OFFLOAD_CANCEL] = (nfsd4_enc)nfsd4_encode_noop,
4998 [OP_OFFLOAD_STATUS] = (nfsd4_enc)nfsd4_encode_offload_status,
4999 [OP_READ_PLUS] = (nfsd4_enc)nfsd4_encode_noop,
5000 [OP_SEEK] = (nfsd4_enc)nfsd4_encode_seek,
5001 [OP_WRITE_SAME] = (nfsd4_enc)nfsd4_encode_noop,
5002 [OP_CLONE] = (nfsd4_enc)nfsd4_encode_noop,
5003
5004
5005 [OP_GETXATTR] = (nfsd4_enc)nfsd4_encode_getxattr,
5006 [OP_SETXATTR] = (nfsd4_enc)nfsd4_encode_setxattr,
5007 [OP_LISTXATTRS] = (nfsd4_enc)nfsd4_encode_listxattrs,
5008 [OP_REMOVEXATTR] = (nfsd4_enc)nfsd4_encode_removexattr,
5009};
5010
5011
5012
5013
5014
5015
5016
5017
5018
5019
5020
5021
5022
5023
5024__be32 nfsd4_check_resp_size(struct nfsd4_compoundres *resp, u32 respsize)
5025{
5026 struct xdr_buf *buf = &resp->rqstp->rq_res;
5027 struct nfsd4_slot *slot = resp->cstate.slot;
5028
5029 if (buf->len + respsize <= buf->buflen)
5030 return nfs_ok;
5031 if (!nfsd4_has_session(&resp->cstate))
5032 return nfserr_resource;
5033 if (slot->sl_flags & NFSD4_SLOT_CACHETHIS) {
5034 WARN_ON_ONCE(1);
5035 return nfserr_rep_too_big_to_cache;
5036 }
5037 return nfserr_rep_too_big;
5038}
5039
5040void
5041nfsd4_encode_operation(struct nfsd4_compoundres *resp, struct nfsd4_op *op)
5042{
5043 struct xdr_stream *xdr = &resp->xdr;
5044 struct nfs4_stateowner *so = resp->cstate.replay_owner;
5045 struct svc_rqst *rqstp = resp->rqstp;
5046 const struct nfsd4_operation *opdesc = op->opdesc;
5047 int post_err_offset;
5048 nfsd4_enc encoder;
5049 __be32 *p;
5050
5051 p = xdr_reserve_space(xdr, 8);
5052 if (!p) {
5053 WARN_ON_ONCE(1);
5054 return;
5055 }
5056 *p++ = cpu_to_be32(op->opnum);
5057 post_err_offset = xdr->buf->len;
5058
5059 if (op->opnum == OP_ILLEGAL)
5060 goto status;
5061 if (op->status && opdesc &&
5062 !(opdesc->op_flags & OP_NONTRIVIAL_ERROR_ENCODE))
5063 goto status;
5064 BUG_ON(op->opnum < 0 || op->opnum >= ARRAY_SIZE(nfsd4_enc_ops) ||
5065 !nfsd4_enc_ops[op->opnum]);
5066 encoder = nfsd4_enc_ops[op->opnum];
5067 op->status = encoder(resp, op->status, &op->u);
5068 if (opdesc && opdesc->op_release)
5069 opdesc->op_release(&op->u);
5070 xdr_commit_encode(xdr);
5071
5072
5073 if (!op->status) {
5074 int space_needed = 0;
5075 if (!nfsd4_last_compound_op(rqstp))
5076 space_needed = COMPOUND_ERR_SLACK_SPACE;
5077 op->status = nfsd4_check_resp_size(resp, space_needed);
5078 }
5079 if (op->status == nfserr_resource && nfsd4_has_session(&resp->cstate)) {
5080 struct nfsd4_slot *slot = resp->cstate.slot;
5081
5082 if (slot->sl_flags & NFSD4_SLOT_CACHETHIS)
5083 op->status = nfserr_rep_too_big_to_cache;
5084 else
5085 op->status = nfserr_rep_too_big;
5086 }
5087 if (op->status == nfserr_resource ||
5088 op->status == nfserr_rep_too_big ||
5089 op->status == nfserr_rep_too_big_to_cache) {
5090
5091
5092
5093
5094
5095
5096
5097 warn_on_nonidempotent_op(op);
5098 xdr_truncate_encode(xdr, post_err_offset);
5099 }
5100 if (so) {
5101 int len = xdr->buf->len - post_err_offset;
5102
5103 so->so_replay.rp_status = op->status;
5104 so->so_replay.rp_buflen = len;
5105 read_bytes_from_xdr_buf(xdr->buf, post_err_offset,
5106 so->so_replay.rp_buf, len);
5107 }
5108status:
5109
5110 write_bytes_to_xdr_buf(xdr->buf, post_err_offset - 4, &op->status, 4);
5111}
5112
5113
5114
5115
5116
5117
5118
5119void
5120nfsd4_encode_replay(struct xdr_stream *xdr, struct nfsd4_op *op)
5121{
5122 __be32 *p;
5123 struct nfs4_replay *rp = op->replay;
5124
5125 p = xdr_reserve_space(xdr, 8 + rp->rp_buflen);
5126 if (!p) {
5127 WARN_ON_ONCE(1);
5128 return;
5129 }
5130 *p++ = cpu_to_be32(op->opnum);
5131 *p++ = rp->rp_status;
5132
5133 p = xdr_encode_opaque_fixed(p, rp->rp_buf, rp->rp_buflen);
5134}
5135
5136int
5137nfs4svc_encode_voidres(struct svc_rqst *rqstp, __be32 *p)
5138{
5139 return xdr_ressize_check(rqstp, p);
5140}
5141
5142void nfsd4_release_compoundargs(struct svc_rqst *rqstp)
5143{
5144 struct nfsd4_compoundargs *args = rqstp->rq_argp;
5145
5146 if (args->ops != args->iops) {
5147 kfree(args->ops);
5148 args->ops = args->iops;
5149 }
5150 kfree(args->tmpp);
5151 args->tmpp = NULL;
5152 while (args->to_free) {
5153 struct svcxdr_tmpbuf *tb = args->to_free;
5154 args->to_free = tb->next;
5155 kfree(tb);
5156 }
5157}
5158
5159int
5160nfs4svc_decode_compoundargs(struct svc_rqst *rqstp, __be32 *p)
5161{
5162 struct nfsd4_compoundargs *args = rqstp->rq_argp;
5163
5164 if (rqstp->rq_arg.head[0].iov_len % 4) {
5165
5166 dprintk("%s: compound not properly padded! (peeraddr=%pISc xid=0x%x)",
5167 __func__, svc_addr(rqstp), be32_to_cpu(rqstp->rq_xid));
5168 return 0;
5169 }
5170 args->p = p;
5171 args->end = rqstp->rq_arg.head[0].iov_base + rqstp->rq_arg.head[0].iov_len;
5172 args->pagelist = rqstp->rq_arg.pages;
5173 args->pagelen = rqstp->rq_arg.page_len;
5174 args->tail = false;
5175 args->tmpp = NULL;
5176 args->to_free = NULL;
5177 args->ops = args->iops;
5178 args->rqstp = rqstp;
5179
5180 return !nfsd4_decode_compound(args);
5181}
5182
5183int
5184nfs4svc_encode_compoundres(struct svc_rqst *rqstp, __be32 *p)
5185{
5186
5187
5188
5189 struct nfsd4_compoundres *resp = rqstp->rq_resp;
5190 struct xdr_buf *buf = resp->xdr.buf;
5191
5192 WARN_ON_ONCE(buf->len != buf->head[0].iov_len + buf->page_len +
5193 buf->tail[0].iov_len);
5194
5195 rqstp->rq_next_page = resp->xdr.page_ptr + 1;
5196
5197 p = resp->tagp;
5198 *p++ = htonl(resp->taglen);
5199 memcpy(p, resp->tag, resp->taglen);
5200 p += XDR_QUADLEN(resp->taglen);
5201 *p++ = htonl(resp->opcnt);
5202
5203 nfsd4_sequence_done(resp);
5204 return 1;
5205}
5206
5207
5208
5209
5210
5211
5212