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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#include "trace.h"
58
59#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
60#include <linux/security.h>
61#endif
62
63
64#define NFSDDBG_FACILITY NFSDDBG_XDR
65
66const u32 nfsd_suppattrs[3][3] = {
67 {NFSD4_SUPPORTED_ATTRS_WORD0,
68 NFSD4_SUPPORTED_ATTRS_WORD1,
69 NFSD4_SUPPORTED_ATTRS_WORD2},
70
71 {NFSD4_1_SUPPORTED_ATTRS_WORD0,
72 NFSD4_1_SUPPORTED_ATTRS_WORD1,
73 NFSD4_1_SUPPORTED_ATTRS_WORD2},
74
75 {NFSD4_1_SUPPORTED_ATTRS_WORD0,
76 NFSD4_1_SUPPORTED_ATTRS_WORD1,
77 NFSD4_2_SUPPORTED_ATTRS_WORD2},
78};
79
80
81
82
83
84
85#define NFS4_REFERRAL_FSID_MAJOR 0x8000000ULL
86#define NFS4_REFERRAL_FSID_MINOR 0x8000000ULL
87
88static __be32
89check_filename(char *str, int len)
90{
91 int i;
92
93 if (len == 0)
94 return nfserr_inval;
95 if (len > NFS4_MAXNAMLEN)
96 return nfserr_nametoolong;
97 if (isdotent(str, len))
98 return nfserr_badname;
99 for (i = 0; i < len; i++)
100 if (str[i] == '/')
101 return nfserr_badname;
102 return 0;
103}
104
105static int zero_clientid(clientid_t *clid)
106{
107 return (clid->cl_boot == 0) && (clid->cl_id == 0);
108}
109
110
111
112
113
114
115
116
117
118static void *
119svcxdr_tmpalloc(struct nfsd4_compoundargs *argp, u32 len)
120{
121 struct svcxdr_tmpbuf *tb;
122
123 tb = kmalloc(sizeof(*tb) + len, GFP_KERNEL);
124 if (!tb)
125 return NULL;
126 tb->next = argp->to_free;
127 argp->to_free = tb;
128 return tb->buf;
129}
130
131
132
133
134
135
136
137
138static char *
139svcxdr_dupstr(struct nfsd4_compoundargs *argp, void *buf, u32 len)
140{
141 char *p = svcxdr_tmpalloc(argp, len + 1);
142
143 if (!p)
144 return NULL;
145 memcpy(p, buf, len);
146 p[len] = '\0';
147 return p;
148}
149
150static void *
151svcxdr_savemem(struct nfsd4_compoundargs *argp, __be32 *p, u32 len)
152{
153 __be32 *tmp;
154
155
156
157
158
159 if (p != argp->xdr->scratch.iov_base)
160 return p;
161
162 tmp = svcxdr_tmpalloc(argp, len);
163 if (!tmp)
164 return NULL;
165 memcpy(tmp, p, len);
166 return tmp;
167}
168
169
170
171
172
173
174
175
176
177static __be32
178nfsd4_decode_ignored_string(struct nfsd4_compoundargs *argp, u32 maxlen)
179{
180 u32 len;
181
182 if (xdr_stream_decode_u32(argp->xdr, &len) < 0)
183 return nfserr_bad_xdr;
184 if (maxlen && len > maxlen)
185 return nfserr_bad_xdr;
186 if (!xdr_inline_decode(argp->xdr, len))
187 return nfserr_bad_xdr;
188
189 return nfs_ok;
190}
191
192static __be32
193nfsd4_decode_opaque(struct nfsd4_compoundargs *argp, struct xdr_netobj *o)
194{
195 __be32 *p;
196 u32 len;
197
198 if (xdr_stream_decode_u32(argp->xdr, &len) < 0)
199 return nfserr_bad_xdr;
200 if (len == 0 || len > NFS4_OPAQUE_LIMIT)
201 return nfserr_bad_xdr;
202 p = xdr_inline_decode(argp->xdr, len);
203 if (!p)
204 return nfserr_bad_xdr;
205 o->data = svcxdr_savemem(argp, p, len);
206 if (!o->data)
207 return nfserr_jukebox;
208 o->len = len;
209
210 return nfs_ok;
211}
212
213static __be32
214nfsd4_decode_component4(struct nfsd4_compoundargs *argp, char **namp, u32 *lenp)
215{
216 __be32 *p, status;
217
218 if (xdr_stream_decode_u32(argp->xdr, lenp) < 0)
219 return nfserr_bad_xdr;
220 p = xdr_inline_decode(argp->xdr, *lenp);
221 if (!p)
222 return nfserr_bad_xdr;
223 status = check_filename((char *)p, *lenp);
224 if (status)
225 return status;
226 *namp = svcxdr_savemem(argp, p, *lenp);
227 if (!*namp)
228 return nfserr_jukebox;
229
230 return nfs_ok;
231}
232
233static __be32
234nfsd4_decode_nfstime4(struct nfsd4_compoundargs *argp, struct timespec64 *tv)
235{
236 __be32 *p;
237
238 p = xdr_inline_decode(argp->xdr, XDR_UNIT * 3);
239 if (!p)
240 return nfserr_bad_xdr;
241 p = xdr_decode_hyper(p, &tv->tv_sec);
242 tv->tv_nsec = be32_to_cpup(p++);
243 if (tv->tv_nsec >= (u32)1000000000)
244 return nfserr_inval;
245 return nfs_ok;
246}
247
248static __be32
249nfsd4_decode_verifier4(struct nfsd4_compoundargs *argp, nfs4_verifier *verf)
250{
251 __be32 *p;
252
253 p = xdr_inline_decode(argp->xdr, NFS4_VERIFIER_SIZE);
254 if (!p)
255 return nfserr_bad_xdr;
256 memcpy(verf->data, p, sizeof(verf->data));
257 return nfs_ok;
258}
259
260
261
262
263
264
265
266
267
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270
271
272
273
274
275
276
277static __be32
278nfsd4_decode_bitmap4(struct nfsd4_compoundargs *argp, u32 *bmval, u32 bmlen)
279{
280 u32 i, count;
281 __be32 *p;
282
283 if (xdr_stream_decode_u32(argp->xdr, &count) < 0)
284 return nfserr_bad_xdr;
285
286 if (count > 1000)
287 return nfserr_bad_xdr;
288 p = xdr_inline_decode(argp->xdr, count << 2);
289 if (!p)
290 return nfserr_bad_xdr;
291 i = 0;
292 while (i < count)
293 bmval[i++] = be32_to_cpup(p++);
294 while (i < bmlen)
295 bmval[i++] = 0;
296
297 return nfs_ok;
298}
299
300static __be32
301nfsd4_decode_nfsace4(struct nfsd4_compoundargs *argp, struct nfs4_ace *ace)
302{
303 __be32 *p, status;
304 u32 length;
305
306 if (xdr_stream_decode_u32(argp->xdr, &ace->type) < 0)
307 return nfserr_bad_xdr;
308 if (xdr_stream_decode_u32(argp->xdr, &ace->flag) < 0)
309 return nfserr_bad_xdr;
310 if (xdr_stream_decode_u32(argp->xdr, &ace->access_mask) < 0)
311 return nfserr_bad_xdr;
312
313 if (xdr_stream_decode_u32(argp->xdr, &length) < 0)
314 return nfserr_bad_xdr;
315 p = xdr_inline_decode(argp->xdr, length);
316 if (!p)
317 return nfserr_bad_xdr;
318 ace->whotype = nfs4_acl_get_whotype((char *)p, length);
319 if (ace->whotype != NFS4_ACL_WHO_NAMED)
320 status = nfs_ok;
321 else if (ace->flag & NFS4_ACE_IDENTIFIER_GROUP)
322 status = nfsd_map_name_to_gid(argp->rqstp,
323 (char *)p, length, &ace->who_gid);
324 else
325 status = nfsd_map_name_to_uid(argp->rqstp,
326 (char *)p, length, &ace->who_uid);
327
328 return status;
329}
330
331
332static noinline __be32
333nfsd4_decode_acl(struct nfsd4_compoundargs *argp, struct nfs4_acl **acl)
334{
335 struct nfs4_ace *ace;
336 __be32 status;
337 u32 count;
338
339 if (xdr_stream_decode_u32(argp->xdr, &count) < 0)
340 return nfserr_bad_xdr;
341
342 if (count > xdr_stream_remaining(argp->xdr) / 20)
343
344
345
346
347
348 return nfserr_fbig;
349
350 *acl = svcxdr_tmpalloc(argp, nfs4_acl_bytes(count));
351 if (*acl == NULL)
352 return nfserr_jukebox;
353
354 (*acl)->naces = count;
355 for (ace = (*acl)->aces; ace < (*acl)->aces + count; ace++) {
356 status = nfsd4_decode_nfsace4(argp, ace);
357 if (status)
358 return status;
359 }
360
361 return nfs_ok;
362}
363
364static noinline __be32
365nfsd4_decode_security_label(struct nfsd4_compoundargs *argp,
366 struct xdr_netobj *label)
367{
368 u32 lfs, pi, length;
369 __be32 *p;
370
371 if (xdr_stream_decode_u32(argp->xdr, &lfs) < 0)
372 return nfserr_bad_xdr;
373 if (xdr_stream_decode_u32(argp->xdr, &pi) < 0)
374 return nfserr_bad_xdr;
375
376 if (xdr_stream_decode_u32(argp->xdr, &length) < 0)
377 return nfserr_bad_xdr;
378 if (length > NFS4_MAXLABELLEN)
379 return nfserr_badlabel;
380 p = xdr_inline_decode(argp->xdr, length);
381 if (!p)
382 return nfserr_bad_xdr;
383 label->len = length;
384 label->data = svcxdr_dupstr(argp, p, length);
385 if (!label->data)
386 return nfserr_jukebox;
387
388 return nfs_ok;
389}
390
391static __be32
392nfsd4_decode_fattr4(struct nfsd4_compoundargs *argp, u32 *bmval, u32 bmlen,
393 struct iattr *iattr, struct nfs4_acl **acl,
394 struct xdr_netobj *label, int *umask)
395{
396 unsigned int starting_pos;
397 u32 attrlist4_count;
398 __be32 *p, status;
399
400 iattr->ia_valid = 0;
401 status = nfsd4_decode_bitmap4(argp, bmval, bmlen);
402 if (status)
403 return nfserr_bad_xdr;
404
405 if (bmval[0] & ~NFSD_WRITEABLE_ATTRS_WORD0
406 || bmval[1] & ~NFSD_WRITEABLE_ATTRS_WORD1
407 || bmval[2] & ~NFSD_WRITEABLE_ATTRS_WORD2) {
408 if (nfsd_attrs_supported(argp->minorversion, bmval))
409 return nfserr_inval;
410 return nfserr_attrnotsupp;
411 }
412
413 if (xdr_stream_decode_u32(argp->xdr, &attrlist4_count) < 0)
414 return nfserr_bad_xdr;
415 starting_pos = xdr_stream_pos(argp->xdr);
416
417 if (bmval[0] & FATTR4_WORD0_SIZE) {
418 u64 size;
419
420 if (xdr_stream_decode_u64(argp->xdr, &size) < 0)
421 return nfserr_bad_xdr;
422 iattr->ia_size = size;
423 iattr->ia_valid |= ATTR_SIZE;
424 }
425 if (bmval[0] & FATTR4_WORD0_ACL) {
426 status = nfsd4_decode_acl(argp, acl);
427 if (status)
428 return status;
429 } else
430 *acl = NULL;
431 if (bmval[1] & FATTR4_WORD1_MODE) {
432 u32 mode;
433
434 if (xdr_stream_decode_u32(argp->xdr, &mode) < 0)
435 return nfserr_bad_xdr;
436 iattr->ia_mode = mode;
437 iattr->ia_mode &= (S_IFMT | S_IALLUGO);
438 iattr->ia_valid |= ATTR_MODE;
439 }
440 if (bmval[1] & FATTR4_WORD1_OWNER) {
441 u32 length;
442
443 if (xdr_stream_decode_u32(argp->xdr, &length) < 0)
444 return nfserr_bad_xdr;
445 p = xdr_inline_decode(argp->xdr, length);
446 if (!p)
447 return nfserr_bad_xdr;
448 status = nfsd_map_name_to_uid(argp->rqstp, (char *)p, length,
449 &iattr->ia_uid);
450 if (status)
451 return status;
452 iattr->ia_valid |= ATTR_UID;
453 }
454 if (bmval[1] & FATTR4_WORD1_OWNER_GROUP) {
455 u32 length;
456
457 if (xdr_stream_decode_u32(argp->xdr, &length) < 0)
458 return nfserr_bad_xdr;
459 p = xdr_inline_decode(argp->xdr, length);
460 if (!p)
461 return nfserr_bad_xdr;
462 status = nfsd_map_name_to_gid(argp->rqstp, (char *)p, length,
463 &iattr->ia_gid);
464 if (status)
465 return status;
466 iattr->ia_valid |= ATTR_GID;
467 }
468 if (bmval[1] & FATTR4_WORD1_TIME_ACCESS_SET) {
469 u32 set_it;
470
471 if (xdr_stream_decode_u32(argp->xdr, &set_it) < 0)
472 return nfserr_bad_xdr;
473 switch (set_it) {
474 case NFS4_SET_TO_CLIENT_TIME:
475 status = nfsd4_decode_nfstime4(argp, &iattr->ia_atime);
476 if (status)
477 return status;
478 iattr->ia_valid |= (ATTR_ATIME | ATTR_ATIME_SET);
479 break;
480 case NFS4_SET_TO_SERVER_TIME:
481 iattr->ia_valid |= ATTR_ATIME;
482 break;
483 default:
484 return nfserr_bad_xdr;
485 }
486 }
487 if (bmval[1] & FATTR4_WORD1_TIME_MODIFY_SET) {
488 u32 set_it;
489
490 if (xdr_stream_decode_u32(argp->xdr, &set_it) < 0)
491 return nfserr_bad_xdr;
492 switch (set_it) {
493 case NFS4_SET_TO_CLIENT_TIME:
494 status = nfsd4_decode_nfstime4(argp, &iattr->ia_mtime);
495 if (status)
496 return status;
497 iattr->ia_valid |= (ATTR_MTIME | ATTR_MTIME_SET);
498 break;
499 case NFS4_SET_TO_SERVER_TIME:
500 iattr->ia_valid |= ATTR_MTIME;
501 break;
502 default:
503 return nfserr_bad_xdr;
504 }
505 }
506 label->len = 0;
507 if (IS_ENABLED(CONFIG_NFSD_V4_SECURITY_LABEL) &&
508 bmval[2] & FATTR4_WORD2_SECURITY_LABEL) {
509 status = nfsd4_decode_security_label(argp, label);
510 if (status)
511 return status;
512 }
513 if (bmval[2] & FATTR4_WORD2_MODE_UMASK) {
514 u32 mode, mask;
515
516 if (!umask)
517 return nfserr_bad_xdr;
518 if (xdr_stream_decode_u32(argp->xdr, &mode) < 0)
519 return nfserr_bad_xdr;
520 iattr->ia_mode = mode & (S_IFMT | S_IALLUGO);
521 if (xdr_stream_decode_u32(argp->xdr, &mask) < 0)
522 return nfserr_bad_xdr;
523 *umask = mask & S_IRWXUGO;
524 iattr->ia_valid |= ATTR_MODE;
525 }
526
527
528 if (attrlist4_count != xdr_stream_pos(argp->xdr) - starting_pos)
529 return nfserr_bad_xdr;
530
531 return nfs_ok;
532}
533
534static __be32
535nfsd4_decode_stateid4(struct nfsd4_compoundargs *argp, stateid_t *sid)
536{
537 __be32 *p;
538
539 p = xdr_inline_decode(argp->xdr, NFS4_STATEID_SIZE);
540 if (!p)
541 return nfserr_bad_xdr;
542 sid->si_generation = be32_to_cpup(p++);
543 memcpy(&sid->si_opaque, p, sizeof(sid->si_opaque));
544 return nfs_ok;
545}
546
547static __be32
548nfsd4_decode_clientid4(struct nfsd4_compoundargs *argp, clientid_t *clientid)
549{
550 __be32 *p;
551
552 p = xdr_inline_decode(argp->xdr, sizeof(__be64));
553 if (!p)
554 return nfserr_bad_xdr;
555 memcpy(clientid, p, sizeof(*clientid));
556 return nfs_ok;
557}
558
559static __be32
560nfsd4_decode_state_owner4(struct nfsd4_compoundargs *argp,
561 clientid_t *clientid, struct xdr_netobj *owner)
562{
563 __be32 status;
564
565 status = nfsd4_decode_clientid4(argp, clientid);
566 if (status)
567 return status;
568 return nfsd4_decode_opaque(argp, owner);
569}
570
571#ifdef CONFIG_NFSD_PNFS
572static __be32
573nfsd4_decode_deviceid4(struct nfsd4_compoundargs *argp,
574 struct nfsd4_deviceid *devid)
575{
576 __be32 *p;
577
578 p = xdr_inline_decode(argp->xdr, NFS4_DEVICEID4_SIZE);
579 if (!p)
580 return nfserr_bad_xdr;
581 memcpy(devid, p, sizeof(*devid));
582 return nfs_ok;
583}
584
585static __be32
586nfsd4_decode_layoutupdate4(struct nfsd4_compoundargs *argp,
587 struct nfsd4_layoutcommit *lcp)
588{
589 if (xdr_stream_decode_u32(argp->xdr, &lcp->lc_layout_type) < 0)
590 return nfserr_bad_xdr;
591 if (lcp->lc_layout_type < LAYOUT_NFSV4_1_FILES)
592 return nfserr_bad_xdr;
593 if (lcp->lc_layout_type >= LAYOUT_TYPE_MAX)
594 return nfserr_bad_xdr;
595
596 if (xdr_stream_decode_u32(argp->xdr, &lcp->lc_up_len) < 0)
597 return nfserr_bad_xdr;
598 if (lcp->lc_up_len > 0) {
599 lcp->lc_up_layout = xdr_inline_decode(argp->xdr, lcp->lc_up_len);
600 if (!lcp->lc_up_layout)
601 return nfserr_bad_xdr;
602 }
603
604 return nfs_ok;
605}
606
607static __be32
608nfsd4_decode_layoutreturn4(struct nfsd4_compoundargs *argp,
609 struct nfsd4_layoutreturn *lrp)
610{
611 __be32 status;
612
613 if (xdr_stream_decode_u32(argp->xdr, &lrp->lr_return_type) < 0)
614 return nfserr_bad_xdr;
615 switch (lrp->lr_return_type) {
616 case RETURN_FILE:
617 if (xdr_stream_decode_u64(argp->xdr, &lrp->lr_seg.offset) < 0)
618 return nfserr_bad_xdr;
619 if (xdr_stream_decode_u64(argp->xdr, &lrp->lr_seg.length) < 0)
620 return nfserr_bad_xdr;
621 status = nfsd4_decode_stateid4(argp, &lrp->lr_sid);
622 if (status)
623 return status;
624 if (xdr_stream_decode_u32(argp->xdr, &lrp->lrf_body_len) < 0)
625 return nfserr_bad_xdr;
626 if (lrp->lrf_body_len > 0) {
627 lrp->lrf_body = xdr_inline_decode(argp->xdr, lrp->lrf_body_len);
628 if (!lrp->lrf_body)
629 return nfserr_bad_xdr;
630 }
631 break;
632 case RETURN_FSID:
633 case RETURN_ALL:
634 lrp->lr_seg.offset = 0;
635 lrp->lr_seg.length = NFS4_MAX_UINT64;
636 break;
637 default:
638 return nfserr_bad_xdr;
639 }
640
641 return nfs_ok;
642}
643
644#endif
645
646static __be32
647nfsd4_decode_sessionid4(struct nfsd4_compoundargs *argp,
648 struct nfs4_sessionid *sessionid)
649{
650 __be32 *p;
651
652 p = xdr_inline_decode(argp->xdr, NFS4_MAX_SESSIONID_LEN);
653 if (!p)
654 return nfserr_bad_xdr;
655 memcpy(sessionid->data, p, sizeof(sessionid->data));
656 return nfs_ok;
657}
658
659
660static __be32
661nfsd4_decode_authsys_parms(struct nfsd4_compoundargs *argp,
662 struct nfsd4_cb_sec *cbs)
663{
664 u32 stamp, gidcount, uid, gid;
665 __be32 *p, status;
666
667 if (xdr_stream_decode_u32(argp->xdr, &stamp) < 0)
668 return nfserr_bad_xdr;
669
670 status = nfsd4_decode_ignored_string(argp, 255);
671 if (status)
672 return status;
673 if (xdr_stream_decode_u32(argp->xdr, &uid) < 0)
674 return nfserr_bad_xdr;
675 if (xdr_stream_decode_u32(argp->xdr, &gid) < 0)
676 return nfserr_bad_xdr;
677 if (xdr_stream_decode_u32(argp->xdr, &gidcount) < 0)
678 return nfserr_bad_xdr;
679 if (gidcount > 16)
680 return nfserr_bad_xdr;
681 p = xdr_inline_decode(argp->xdr, gidcount << 2);
682 if (!p)
683 return nfserr_bad_xdr;
684 if (cbs->flavor == (u32)(-1)) {
685 struct user_namespace *userns = nfsd_user_namespace(argp->rqstp);
686
687 kuid_t kuid = make_kuid(userns, uid);
688 kgid_t kgid = make_kgid(userns, gid);
689 if (uid_valid(kuid) && gid_valid(kgid)) {
690 cbs->uid = kuid;
691 cbs->gid = kgid;
692 cbs->flavor = RPC_AUTH_UNIX;
693 } else {
694 dprintk("RPC_AUTH_UNIX with invalid uid or gid, ignoring!\n");
695 }
696 }
697
698 return nfs_ok;
699}
700
701static __be32
702nfsd4_decode_gss_cb_handles4(struct nfsd4_compoundargs *argp,
703 struct nfsd4_cb_sec *cbs)
704{
705 __be32 status;
706 u32 service;
707
708 dprintk("RPC_AUTH_GSS callback secflavor not supported!\n");
709
710 if (xdr_stream_decode_u32(argp->xdr, &service) < 0)
711 return nfserr_bad_xdr;
712 if (service < RPC_GSS_SVC_NONE || service > RPC_GSS_SVC_PRIVACY)
713 return nfserr_bad_xdr;
714
715 status = nfsd4_decode_ignored_string(argp, 0);
716 if (status)
717 return status;
718
719 status = nfsd4_decode_ignored_string(argp, 0);
720 if (status)
721 return status;
722
723 return nfs_ok;
724}
725
726
727static __be32
728nfsd4_decode_cb_sec(struct nfsd4_compoundargs *argp, struct nfsd4_cb_sec *cbs)
729{
730 u32 i, secflavor, nr_secflavs;
731 __be32 status;
732
733
734 if (xdr_stream_decode_u32(argp->xdr, &nr_secflavs) < 0)
735 return nfserr_bad_xdr;
736 if (nr_secflavs)
737 cbs->flavor = (u32)(-1);
738 else
739
740 cbs->flavor = 0;
741
742 for (i = 0; i < nr_secflavs; ++i) {
743 if (xdr_stream_decode_u32(argp->xdr, &secflavor) < 0)
744 return nfserr_bad_xdr;
745 switch (secflavor) {
746 case RPC_AUTH_NULL:
747
748 if (cbs->flavor == (u32)(-1))
749 cbs->flavor = RPC_AUTH_NULL;
750 break;
751 case RPC_AUTH_UNIX:
752 status = nfsd4_decode_authsys_parms(argp, cbs);
753 if (status)
754 return status;
755 break;
756 case RPC_AUTH_GSS:
757 status = nfsd4_decode_gss_cb_handles4(argp, cbs);
758 if (status)
759 return status;
760 break;
761 default:
762 return nfserr_inval;
763 }
764 }
765
766 return nfs_ok;
767}
768
769
770
771
772
773
774static __be32
775nfsd4_decode_access(struct nfsd4_compoundargs *argp,
776 struct nfsd4_access *access)
777{
778 if (xdr_stream_decode_u32(argp->xdr, &access->ac_req_access) < 0)
779 return nfserr_bad_xdr;
780 return nfs_ok;
781}
782
783static __be32
784nfsd4_decode_close(struct nfsd4_compoundargs *argp, struct nfsd4_close *close)
785{
786 if (xdr_stream_decode_u32(argp->xdr, &close->cl_seqid) < 0)
787 return nfserr_bad_xdr;
788 return nfsd4_decode_stateid4(argp, &close->cl_stateid);
789}
790
791
792static __be32
793nfsd4_decode_commit(struct nfsd4_compoundargs *argp, struct nfsd4_commit *commit)
794{
795 if (xdr_stream_decode_u64(argp->xdr, &commit->co_offset) < 0)
796 return nfserr_bad_xdr;
797 if (xdr_stream_decode_u32(argp->xdr, &commit->co_count) < 0)
798 return nfserr_bad_xdr;
799 return nfs_ok;
800}
801
802static __be32
803nfsd4_decode_create(struct nfsd4_compoundargs *argp, struct nfsd4_create *create)
804{
805 __be32 *p, status;
806
807 if (xdr_stream_decode_u32(argp->xdr, &create->cr_type) < 0)
808 return nfserr_bad_xdr;
809 switch (create->cr_type) {
810 case NF4LNK:
811 if (xdr_stream_decode_u32(argp->xdr, &create->cr_datalen) < 0)
812 return nfserr_bad_xdr;
813 p = xdr_inline_decode(argp->xdr, create->cr_datalen);
814 if (!p)
815 return nfserr_bad_xdr;
816 create->cr_data = svcxdr_dupstr(argp, p, create->cr_datalen);
817 if (!create->cr_data)
818 return nfserr_jukebox;
819 break;
820 case NF4BLK:
821 case NF4CHR:
822 if (xdr_stream_decode_u32(argp->xdr, &create->cr_specdata1) < 0)
823 return nfserr_bad_xdr;
824 if (xdr_stream_decode_u32(argp->xdr, &create->cr_specdata2) < 0)
825 return nfserr_bad_xdr;
826 break;
827 case NF4SOCK:
828 case NF4FIFO:
829 case NF4DIR:
830 default:
831 break;
832 }
833 status = nfsd4_decode_component4(argp, &create->cr_name,
834 &create->cr_namelen);
835 if (status)
836 return status;
837 status = nfsd4_decode_fattr4(argp, create->cr_bmval,
838 ARRAY_SIZE(create->cr_bmval),
839 &create->cr_iattr, &create->cr_acl,
840 &create->cr_label, &create->cr_umask);
841 if (status)
842 return status;
843
844 return nfs_ok;
845}
846
847static inline __be32
848nfsd4_decode_delegreturn(struct nfsd4_compoundargs *argp, struct nfsd4_delegreturn *dr)
849{
850 return nfsd4_decode_stateid4(argp, &dr->dr_stateid);
851}
852
853static inline __be32
854nfsd4_decode_getattr(struct nfsd4_compoundargs *argp, struct nfsd4_getattr *getattr)
855{
856 return nfsd4_decode_bitmap4(argp, getattr->ga_bmval,
857 ARRAY_SIZE(getattr->ga_bmval));
858}
859
860static __be32
861nfsd4_decode_link(struct nfsd4_compoundargs *argp, struct nfsd4_link *link)
862{
863 return nfsd4_decode_component4(argp, &link->li_name, &link->li_namelen);
864}
865
866static __be32
867nfsd4_decode_open_to_lock_owner4(struct nfsd4_compoundargs *argp,
868 struct nfsd4_lock *lock)
869{
870 __be32 status;
871
872 if (xdr_stream_decode_u32(argp->xdr, &lock->lk_new_open_seqid) < 0)
873 return nfserr_bad_xdr;
874 status = nfsd4_decode_stateid4(argp, &lock->lk_new_open_stateid);
875 if (status)
876 return status;
877 if (xdr_stream_decode_u32(argp->xdr, &lock->lk_new_lock_seqid) < 0)
878 return nfserr_bad_xdr;
879 return nfsd4_decode_state_owner4(argp, &lock->lk_new_clientid,
880 &lock->lk_new_owner);
881}
882
883static __be32
884nfsd4_decode_exist_lock_owner4(struct nfsd4_compoundargs *argp,
885 struct nfsd4_lock *lock)
886{
887 __be32 status;
888
889 status = nfsd4_decode_stateid4(argp, &lock->lk_old_lock_stateid);
890 if (status)
891 return status;
892 if (xdr_stream_decode_u32(argp->xdr, &lock->lk_old_lock_seqid) < 0)
893 return nfserr_bad_xdr;
894
895 return nfs_ok;
896}
897
898static __be32
899nfsd4_decode_locker4(struct nfsd4_compoundargs *argp, struct nfsd4_lock *lock)
900{
901 if (xdr_stream_decode_bool(argp->xdr, &lock->lk_is_new) < 0)
902 return nfserr_bad_xdr;
903 if (lock->lk_is_new)
904 return nfsd4_decode_open_to_lock_owner4(argp, lock);
905 return nfsd4_decode_exist_lock_owner4(argp, lock);
906}
907
908static __be32
909nfsd4_decode_lock(struct nfsd4_compoundargs *argp, struct nfsd4_lock *lock)
910{
911 if (xdr_stream_decode_u32(argp->xdr, &lock->lk_type) < 0)
912 return nfserr_bad_xdr;
913 if ((lock->lk_type < NFS4_READ_LT) || (lock->lk_type > NFS4_WRITEW_LT))
914 return nfserr_bad_xdr;
915 if (xdr_stream_decode_bool(argp->xdr, &lock->lk_reclaim) < 0)
916 return nfserr_bad_xdr;
917 if (xdr_stream_decode_u64(argp->xdr, &lock->lk_offset) < 0)
918 return nfserr_bad_xdr;
919 if (xdr_stream_decode_u64(argp->xdr, &lock->lk_length) < 0)
920 return nfserr_bad_xdr;
921 return nfsd4_decode_locker4(argp, lock);
922}
923
924static __be32
925nfsd4_decode_lockt(struct nfsd4_compoundargs *argp, struct nfsd4_lockt *lockt)
926{
927 if (xdr_stream_decode_u32(argp->xdr, &lockt->lt_type) < 0)
928 return nfserr_bad_xdr;
929 if ((lockt->lt_type < NFS4_READ_LT) || (lockt->lt_type > NFS4_WRITEW_LT))
930 return nfserr_bad_xdr;
931 if (xdr_stream_decode_u64(argp->xdr, &lockt->lt_offset) < 0)
932 return nfserr_bad_xdr;
933 if (xdr_stream_decode_u64(argp->xdr, &lockt->lt_length) < 0)
934 return nfserr_bad_xdr;
935 return nfsd4_decode_state_owner4(argp, &lockt->lt_clientid,
936 &lockt->lt_owner);
937}
938
939static __be32
940nfsd4_decode_locku(struct nfsd4_compoundargs *argp, struct nfsd4_locku *locku)
941{
942 __be32 status;
943
944 if (xdr_stream_decode_u32(argp->xdr, &locku->lu_type) < 0)
945 return nfserr_bad_xdr;
946 if ((locku->lu_type < NFS4_READ_LT) || (locku->lu_type > NFS4_WRITEW_LT))
947 return nfserr_bad_xdr;
948 if (xdr_stream_decode_u32(argp->xdr, &locku->lu_seqid) < 0)
949 return nfserr_bad_xdr;
950 status = nfsd4_decode_stateid4(argp, &locku->lu_stateid);
951 if (status)
952 return status;
953 if (xdr_stream_decode_u64(argp->xdr, &locku->lu_offset) < 0)
954 return nfserr_bad_xdr;
955 if (xdr_stream_decode_u64(argp->xdr, &locku->lu_length) < 0)
956 return nfserr_bad_xdr;
957
958 return nfs_ok;
959}
960
961static __be32
962nfsd4_decode_lookup(struct nfsd4_compoundargs *argp, struct nfsd4_lookup *lookup)
963{
964 return nfsd4_decode_component4(argp, &lookup->lo_name, &lookup->lo_len);
965}
966
967static __be32
968nfsd4_decode_createhow4(struct nfsd4_compoundargs *argp, struct nfsd4_open *open)
969{
970 __be32 status;
971
972 if (xdr_stream_decode_u32(argp->xdr, &open->op_createmode) < 0)
973 return nfserr_bad_xdr;
974 switch (open->op_createmode) {
975 case NFS4_CREATE_UNCHECKED:
976 case NFS4_CREATE_GUARDED:
977 status = nfsd4_decode_fattr4(argp, open->op_bmval,
978 ARRAY_SIZE(open->op_bmval),
979 &open->op_iattr, &open->op_acl,
980 &open->op_label, &open->op_umask);
981 if (status)
982 return status;
983 break;
984 case NFS4_CREATE_EXCLUSIVE:
985 status = nfsd4_decode_verifier4(argp, &open->op_verf);
986 if (status)
987 return status;
988 break;
989 case NFS4_CREATE_EXCLUSIVE4_1:
990 if (argp->minorversion < 1)
991 return nfserr_bad_xdr;
992 status = nfsd4_decode_verifier4(argp, &open->op_verf);
993 if (status)
994 return status;
995 status = nfsd4_decode_fattr4(argp, open->op_bmval,
996 ARRAY_SIZE(open->op_bmval),
997 &open->op_iattr, &open->op_acl,
998 &open->op_label, &open->op_umask);
999 if (status)
1000 return status;
1001 break;
1002 default:
1003 return nfserr_bad_xdr;
1004 }
1005
1006 return nfs_ok;
1007}
1008
1009static __be32
1010nfsd4_decode_openflag4(struct nfsd4_compoundargs *argp, struct nfsd4_open *open)
1011{
1012 __be32 status;
1013
1014 if (xdr_stream_decode_u32(argp->xdr, &open->op_create) < 0)
1015 return nfserr_bad_xdr;
1016 switch (open->op_create) {
1017 case NFS4_OPEN_NOCREATE:
1018 break;
1019 case NFS4_OPEN_CREATE:
1020 status = nfsd4_decode_createhow4(argp, open);
1021 if (status)
1022 return status;
1023 break;
1024 default:
1025 return nfserr_bad_xdr;
1026 }
1027
1028 return nfs_ok;
1029}
1030
1031static __be32 nfsd4_decode_share_access(struct nfsd4_compoundargs *argp, u32 *share_access, u32 *deleg_want, u32 *deleg_when)
1032{
1033 u32 w;
1034
1035 if (xdr_stream_decode_u32(argp->xdr, &w) < 0)
1036 return nfserr_bad_xdr;
1037 *share_access = w & NFS4_SHARE_ACCESS_MASK;
1038 *deleg_want = w & NFS4_SHARE_WANT_MASK;
1039 if (deleg_when)
1040 *deleg_when = w & NFS4_SHARE_WHEN_MASK;
1041
1042 switch (w & NFS4_SHARE_ACCESS_MASK) {
1043 case NFS4_SHARE_ACCESS_READ:
1044 case NFS4_SHARE_ACCESS_WRITE:
1045 case NFS4_SHARE_ACCESS_BOTH:
1046 break;
1047 default:
1048 return nfserr_bad_xdr;
1049 }
1050 w &= ~NFS4_SHARE_ACCESS_MASK;
1051 if (!w)
1052 return nfs_ok;
1053 if (!argp->minorversion)
1054 return nfserr_bad_xdr;
1055 switch (w & NFS4_SHARE_WANT_MASK) {
1056 case NFS4_SHARE_WANT_NO_PREFERENCE:
1057 case NFS4_SHARE_WANT_READ_DELEG:
1058 case NFS4_SHARE_WANT_WRITE_DELEG:
1059 case NFS4_SHARE_WANT_ANY_DELEG:
1060 case NFS4_SHARE_WANT_NO_DELEG:
1061 case NFS4_SHARE_WANT_CANCEL:
1062 break;
1063 default:
1064 return nfserr_bad_xdr;
1065 }
1066 w &= ~NFS4_SHARE_WANT_MASK;
1067 if (!w)
1068 return nfs_ok;
1069
1070 if (!deleg_when)
1071 return nfserr_inval;
1072 switch (w) {
1073 case NFS4_SHARE_SIGNAL_DELEG_WHEN_RESRC_AVAIL:
1074 case NFS4_SHARE_PUSH_DELEG_WHEN_UNCONTENDED:
1075 case (NFS4_SHARE_SIGNAL_DELEG_WHEN_RESRC_AVAIL |
1076 NFS4_SHARE_PUSH_DELEG_WHEN_UNCONTENDED):
1077 return nfs_ok;
1078 }
1079 return nfserr_bad_xdr;
1080}
1081
1082static __be32 nfsd4_decode_share_deny(struct nfsd4_compoundargs *argp, u32 *x)
1083{
1084 if (xdr_stream_decode_u32(argp->xdr, x) < 0)
1085 return nfserr_bad_xdr;
1086
1087 if (*x & ~NFS4_SHARE_DENY_BOTH)
1088 return nfserr_bad_xdr;
1089
1090 return nfs_ok;
1091}
1092
1093static __be32
1094nfsd4_decode_open_claim4(struct nfsd4_compoundargs *argp,
1095 struct nfsd4_open *open)
1096{
1097 __be32 status;
1098
1099 if (xdr_stream_decode_u32(argp->xdr, &open->op_claim_type) < 0)
1100 return nfserr_bad_xdr;
1101 switch (open->op_claim_type) {
1102 case NFS4_OPEN_CLAIM_NULL:
1103 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
1104 status = nfsd4_decode_component4(argp, &open->op_fname,
1105 &open->op_fnamelen);
1106 if (status)
1107 return status;
1108 break;
1109 case NFS4_OPEN_CLAIM_PREVIOUS:
1110 if (xdr_stream_decode_u32(argp->xdr, &open->op_delegate_type) < 0)
1111 return nfserr_bad_xdr;
1112 break;
1113 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1114 status = nfsd4_decode_stateid4(argp, &open->op_delegate_stateid);
1115 if (status)
1116 return status;
1117 status = nfsd4_decode_component4(argp, &open->op_fname,
1118 &open->op_fnamelen);
1119 if (status)
1120 return status;
1121 break;
1122 case NFS4_OPEN_CLAIM_FH:
1123 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
1124 if (argp->minorversion < 1)
1125 return nfserr_bad_xdr;
1126
1127 break;
1128 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1129 if (argp->minorversion < 1)
1130 return nfserr_bad_xdr;
1131 status = nfsd4_decode_stateid4(argp, &open->op_delegate_stateid);
1132 if (status)
1133 return status;
1134 break;
1135 default:
1136 return nfserr_bad_xdr;
1137 }
1138
1139 return nfs_ok;
1140}
1141
1142static __be32
1143nfsd4_decode_open(struct nfsd4_compoundargs *argp, struct nfsd4_open *open)
1144{
1145 __be32 status;
1146 u32 dummy;
1147
1148 memset(open->op_bmval, 0, sizeof(open->op_bmval));
1149 open->op_iattr.ia_valid = 0;
1150 open->op_openowner = NULL;
1151
1152 open->op_xdr_error = 0;
1153 if (xdr_stream_decode_u32(argp->xdr, &open->op_seqid) < 0)
1154 return nfserr_bad_xdr;
1155
1156 status = nfsd4_decode_share_access(argp, &open->op_share_access,
1157 &open->op_deleg_want, &dummy);
1158 if (status)
1159 return status;
1160 status = nfsd4_decode_share_deny(argp, &open->op_share_deny);
1161 if (status)
1162 return status;
1163 status = nfsd4_decode_state_owner4(argp, &open->op_clientid,
1164 &open->op_owner);
1165 if (status)
1166 return status;
1167 status = nfsd4_decode_openflag4(argp, open);
1168 if (status)
1169 return status;
1170 return nfsd4_decode_open_claim4(argp, open);
1171}
1172
1173static __be32
1174nfsd4_decode_open_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_open_confirm *open_conf)
1175{
1176 __be32 status;
1177
1178 if (argp->minorversion >= 1)
1179 return nfserr_notsupp;
1180
1181 status = nfsd4_decode_stateid4(argp, &open_conf->oc_req_stateid);
1182 if (status)
1183 return status;
1184 if (xdr_stream_decode_u32(argp->xdr, &open_conf->oc_seqid) < 0)
1185 return nfserr_bad_xdr;
1186
1187 return nfs_ok;
1188}
1189
1190static __be32
1191nfsd4_decode_open_downgrade(struct nfsd4_compoundargs *argp, struct nfsd4_open_downgrade *open_down)
1192{
1193 __be32 status;
1194
1195 status = nfsd4_decode_stateid4(argp, &open_down->od_stateid);
1196 if (status)
1197 return status;
1198 if (xdr_stream_decode_u32(argp->xdr, &open_down->od_seqid) < 0)
1199 return nfserr_bad_xdr;
1200
1201 status = nfsd4_decode_share_access(argp, &open_down->od_share_access,
1202 &open_down->od_deleg_want, NULL);
1203 if (status)
1204 return status;
1205 return nfsd4_decode_share_deny(argp, &open_down->od_share_deny);
1206}
1207
1208static __be32
1209nfsd4_decode_putfh(struct nfsd4_compoundargs *argp, struct nfsd4_putfh *putfh)
1210{
1211 __be32 *p;
1212
1213 if (xdr_stream_decode_u32(argp->xdr, &putfh->pf_fhlen) < 0)
1214 return nfserr_bad_xdr;
1215 if (putfh->pf_fhlen > NFS4_FHSIZE)
1216 return nfserr_bad_xdr;
1217 p = xdr_inline_decode(argp->xdr, putfh->pf_fhlen);
1218 if (!p)
1219 return nfserr_bad_xdr;
1220 putfh->pf_fhval = svcxdr_savemem(argp, p, putfh->pf_fhlen);
1221 if (!putfh->pf_fhval)
1222 return nfserr_jukebox;
1223
1224 return nfs_ok;
1225}
1226
1227static __be32
1228nfsd4_decode_putpubfh(struct nfsd4_compoundargs *argp, void *p)
1229{
1230 if (argp->minorversion == 0)
1231 return nfs_ok;
1232 return nfserr_notsupp;
1233}
1234
1235static __be32
1236nfsd4_decode_read(struct nfsd4_compoundargs *argp, struct nfsd4_read *read)
1237{
1238 __be32 status;
1239
1240 status = nfsd4_decode_stateid4(argp, &read->rd_stateid);
1241 if (status)
1242 return status;
1243 if (xdr_stream_decode_u64(argp->xdr, &read->rd_offset) < 0)
1244 return nfserr_bad_xdr;
1245 if (xdr_stream_decode_u32(argp->xdr, &read->rd_length) < 0)
1246 return nfserr_bad_xdr;
1247
1248 return nfs_ok;
1249}
1250
1251static __be32
1252nfsd4_decode_readdir(struct nfsd4_compoundargs *argp, struct nfsd4_readdir *readdir)
1253{
1254 __be32 status;
1255
1256 if (xdr_stream_decode_u64(argp->xdr, &readdir->rd_cookie) < 0)
1257 return nfserr_bad_xdr;
1258 status = nfsd4_decode_verifier4(argp, &readdir->rd_verf);
1259 if (status)
1260 return status;
1261 if (xdr_stream_decode_u32(argp->xdr, &readdir->rd_dircount) < 0)
1262 return nfserr_bad_xdr;
1263 if (xdr_stream_decode_u32(argp->xdr, &readdir->rd_maxcount) < 0)
1264 return nfserr_bad_xdr;
1265 if (xdr_stream_decode_uint32_array(argp->xdr, readdir->rd_bmval,
1266 ARRAY_SIZE(readdir->rd_bmval)) < 0)
1267 return nfserr_bad_xdr;
1268
1269 return nfs_ok;
1270}
1271
1272static __be32
1273nfsd4_decode_remove(struct nfsd4_compoundargs *argp, struct nfsd4_remove *remove)
1274{
1275 return nfsd4_decode_component4(argp, &remove->rm_name, &remove->rm_namelen);
1276}
1277
1278static __be32
1279nfsd4_decode_rename(struct nfsd4_compoundargs *argp, struct nfsd4_rename *rename)
1280{
1281 __be32 status;
1282
1283 status = nfsd4_decode_component4(argp, &rename->rn_sname, &rename->rn_snamelen);
1284 if (status)
1285 return status;
1286 return nfsd4_decode_component4(argp, &rename->rn_tname, &rename->rn_tnamelen);
1287}
1288
1289static __be32
1290nfsd4_decode_renew(struct nfsd4_compoundargs *argp, clientid_t *clientid)
1291{
1292 return nfsd4_decode_clientid4(argp, clientid);
1293}
1294
1295static __be32
1296nfsd4_decode_secinfo(struct nfsd4_compoundargs *argp,
1297 struct nfsd4_secinfo *secinfo)
1298{
1299 return nfsd4_decode_component4(argp, &secinfo->si_name, &secinfo->si_namelen);
1300}
1301
1302static __be32
1303nfsd4_decode_setattr(struct nfsd4_compoundargs *argp, struct nfsd4_setattr *setattr)
1304{
1305 __be32 status;
1306
1307 status = nfsd4_decode_stateid4(argp, &setattr->sa_stateid);
1308 if (status)
1309 return status;
1310 return nfsd4_decode_fattr4(argp, setattr->sa_bmval,
1311 ARRAY_SIZE(setattr->sa_bmval),
1312 &setattr->sa_iattr, &setattr->sa_acl,
1313 &setattr->sa_label, NULL);
1314}
1315
1316static __be32
1317nfsd4_decode_setclientid(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid *setclientid)
1318{
1319 __be32 *p, status;
1320
1321 if (argp->minorversion >= 1)
1322 return nfserr_notsupp;
1323
1324 status = nfsd4_decode_verifier4(argp, &setclientid->se_verf);
1325 if (status)
1326 return status;
1327 status = nfsd4_decode_opaque(argp, &setclientid->se_name);
1328 if (status)
1329 return status;
1330 if (xdr_stream_decode_u32(argp->xdr, &setclientid->se_callback_prog) < 0)
1331 return nfserr_bad_xdr;
1332 if (xdr_stream_decode_u32(argp->xdr, &setclientid->se_callback_netid_len) < 0)
1333 return nfserr_bad_xdr;
1334 p = xdr_inline_decode(argp->xdr, setclientid->se_callback_netid_len);
1335 if (!p)
1336 return nfserr_bad_xdr;
1337 setclientid->se_callback_netid_val = svcxdr_savemem(argp, p,
1338 setclientid->se_callback_netid_len);
1339 if (!setclientid->se_callback_netid_val)
1340 return nfserr_jukebox;
1341
1342 if (xdr_stream_decode_u32(argp->xdr, &setclientid->se_callback_addr_len) < 0)
1343 return nfserr_bad_xdr;
1344 p = xdr_inline_decode(argp->xdr, setclientid->se_callback_addr_len);
1345 if (!p)
1346 return nfserr_bad_xdr;
1347 setclientid->se_callback_addr_val = svcxdr_savemem(argp, p,
1348 setclientid->se_callback_addr_len);
1349 if (!setclientid->se_callback_addr_val)
1350 return nfserr_jukebox;
1351 if (xdr_stream_decode_u32(argp->xdr, &setclientid->se_callback_ident) < 0)
1352 return nfserr_bad_xdr;
1353
1354 return nfs_ok;
1355}
1356
1357static __be32
1358nfsd4_decode_setclientid_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid_confirm *scd_c)
1359{
1360 __be32 status;
1361
1362 if (argp->minorversion >= 1)
1363 return nfserr_notsupp;
1364
1365 status = nfsd4_decode_clientid4(argp, &scd_c->sc_clientid);
1366 if (status)
1367 return status;
1368 return nfsd4_decode_verifier4(argp, &scd_c->sc_confirm);
1369}
1370
1371
1372static __be32
1373nfsd4_decode_verify(struct nfsd4_compoundargs *argp, struct nfsd4_verify *verify)
1374{
1375 __be32 *p, status;
1376
1377 status = nfsd4_decode_bitmap4(argp, verify->ve_bmval,
1378 ARRAY_SIZE(verify->ve_bmval));
1379 if (status)
1380 return status;
1381
1382
1383
1384
1385 if (xdr_stream_decode_u32(argp->xdr, &verify->ve_attrlen) < 0)
1386 return nfserr_bad_xdr;
1387 p = xdr_inline_decode(argp->xdr, verify->ve_attrlen);
1388 if (!p)
1389 return nfserr_bad_xdr;
1390 verify->ve_attrval = svcxdr_savemem(argp, p, verify->ve_attrlen);
1391 if (!verify->ve_attrval)
1392 return nfserr_jukebox;
1393
1394 return nfs_ok;
1395}
1396
1397static __be32
1398nfsd4_decode_write(struct nfsd4_compoundargs *argp, struct nfsd4_write *write)
1399{
1400 __be32 status;
1401
1402 status = nfsd4_decode_stateid4(argp, &write->wr_stateid);
1403 if (status)
1404 return status;
1405 if (xdr_stream_decode_u64(argp->xdr, &write->wr_offset) < 0)
1406 return nfserr_bad_xdr;
1407 if (xdr_stream_decode_u32(argp->xdr, &write->wr_stable_how) < 0)
1408 return nfserr_bad_xdr;
1409 if (write->wr_stable_how > NFS_FILE_SYNC)
1410 return nfserr_bad_xdr;
1411 if (xdr_stream_decode_u32(argp->xdr, &write->wr_buflen) < 0)
1412 return nfserr_bad_xdr;
1413 if (!xdr_stream_subsegment(argp->xdr, &write->wr_payload, write->wr_buflen))
1414 return nfserr_bad_xdr;
1415
1416 return nfs_ok;
1417}
1418
1419static __be32
1420nfsd4_decode_release_lockowner(struct nfsd4_compoundargs *argp, struct nfsd4_release_lockowner *rlockowner)
1421{
1422 __be32 status;
1423
1424 if (argp->minorversion >= 1)
1425 return nfserr_notsupp;
1426
1427 status = nfsd4_decode_state_owner4(argp, &rlockowner->rl_clientid,
1428 &rlockowner->rl_owner);
1429 if (status)
1430 return status;
1431
1432 if (argp->minorversion && !zero_clientid(&rlockowner->rl_clientid))
1433 return nfserr_inval;
1434
1435 return nfs_ok;
1436}
1437
1438static __be32 nfsd4_decode_backchannel_ctl(struct nfsd4_compoundargs *argp, struct nfsd4_backchannel_ctl *bc)
1439{
1440 if (xdr_stream_decode_u32(argp->xdr, &bc->bc_cb_program) < 0)
1441 return nfserr_bad_xdr;
1442 return nfsd4_decode_cb_sec(argp, &bc->bc_cb_sec);
1443}
1444
1445static __be32 nfsd4_decode_bind_conn_to_session(struct nfsd4_compoundargs *argp, struct nfsd4_bind_conn_to_session *bcts)
1446{
1447 u32 use_conn_in_rdma_mode;
1448 __be32 status;
1449
1450 status = nfsd4_decode_sessionid4(argp, &bcts->sessionid);
1451 if (status)
1452 return status;
1453 if (xdr_stream_decode_u32(argp->xdr, &bcts->dir) < 0)
1454 return nfserr_bad_xdr;
1455 if (xdr_stream_decode_u32(argp->xdr, &use_conn_in_rdma_mode) < 0)
1456 return nfserr_bad_xdr;
1457
1458 return nfs_ok;
1459}
1460
1461static __be32
1462nfsd4_decode_state_protect_ops(struct nfsd4_compoundargs *argp,
1463 struct nfsd4_exchange_id *exid)
1464{
1465 __be32 status;
1466
1467 status = nfsd4_decode_bitmap4(argp, exid->spo_must_enforce,
1468 ARRAY_SIZE(exid->spo_must_enforce));
1469 if (status)
1470 return nfserr_bad_xdr;
1471 status = nfsd4_decode_bitmap4(argp, exid->spo_must_allow,
1472 ARRAY_SIZE(exid->spo_must_allow));
1473 if (status)
1474 return nfserr_bad_xdr;
1475
1476 return nfs_ok;
1477}
1478
1479
1480
1481
1482
1483static noinline __be32
1484nfsd4_decode_ssv_sp_parms(struct nfsd4_compoundargs *argp,
1485 struct nfsd4_exchange_id *exid)
1486{
1487 u32 count, window, num_gss_handles;
1488 __be32 status;
1489
1490
1491 status = nfsd4_decode_state_protect_ops(argp, exid);
1492 if (status)
1493 return status;
1494
1495
1496 if (xdr_stream_decode_u32(argp->xdr, &count) < 0)
1497 return nfserr_bad_xdr;
1498 while (count--) {
1499 status = nfsd4_decode_ignored_string(argp, 0);
1500 if (status)
1501 return status;
1502 }
1503
1504
1505 if (xdr_stream_decode_u32(argp->xdr, &count) < 0)
1506 return nfserr_bad_xdr;
1507 while (count--) {
1508 status = nfsd4_decode_ignored_string(argp, 0);
1509 if (status)
1510 return status;
1511 }
1512
1513 if (xdr_stream_decode_u32(argp->xdr, &window) < 0)
1514 return nfserr_bad_xdr;
1515 if (xdr_stream_decode_u32(argp->xdr, &num_gss_handles) < 0)
1516 return nfserr_bad_xdr;
1517
1518 return nfs_ok;
1519}
1520
1521static __be32
1522nfsd4_decode_state_protect4_a(struct nfsd4_compoundargs *argp,
1523 struct nfsd4_exchange_id *exid)
1524{
1525 __be32 status;
1526
1527 if (xdr_stream_decode_u32(argp->xdr, &exid->spa_how) < 0)
1528 return nfserr_bad_xdr;
1529 switch (exid->spa_how) {
1530 case SP4_NONE:
1531 break;
1532 case SP4_MACH_CRED:
1533 status = nfsd4_decode_state_protect_ops(argp, exid);
1534 if (status)
1535 return status;
1536 break;
1537 case SP4_SSV:
1538 status = nfsd4_decode_ssv_sp_parms(argp, exid);
1539 if (status)
1540 return status;
1541 break;
1542 default:
1543 return nfserr_bad_xdr;
1544 }
1545
1546 return nfs_ok;
1547}
1548
1549static __be32
1550nfsd4_decode_nfs_impl_id4(struct nfsd4_compoundargs *argp,
1551 struct nfsd4_exchange_id *exid)
1552{
1553 __be32 status;
1554 u32 count;
1555
1556 if (xdr_stream_decode_u32(argp->xdr, &count) < 0)
1557 return nfserr_bad_xdr;
1558 switch (count) {
1559 case 0:
1560 break;
1561 case 1:
1562
1563
1564
1565 status = nfsd4_decode_opaque(argp, &exid->nii_domain);
1566 if (status)
1567 return status;
1568
1569
1570
1571 status = nfsd4_decode_opaque(argp, &exid->nii_name);
1572 if (status)
1573 return status;
1574 status = nfsd4_decode_nfstime4(argp, &exid->nii_time);
1575 if (status)
1576 return status;
1577 break;
1578 default:
1579 return nfserr_bad_xdr;
1580 }
1581
1582 return nfs_ok;
1583}
1584
1585static __be32
1586nfsd4_decode_exchange_id(struct nfsd4_compoundargs *argp,
1587 struct nfsd4_exchange_id *exid)
1588{
1589 __be32 status;
1590
1591 status = nfsd4_decode_verifier4(argp, &exid->verifier);
1592 if (status)
1593 return status;
1594 status = nfsd4_decode_opaque(argp, &exid->clname);
1595 if (status)
1596 return status;
1597 if (xdr_stream_decode_u32(argp->xdr, &exid->flags) < 0)
1598 return nfserr_bad_xdr;
1599 status = nfsd4_decode_state_protect4_a(argp, exid);
1600 if (status)
1601 return status;
1602 return nfsd4_decode_nfs_impl_id4(argp, exid);
1603}
1604
1605static __be32
1606nfsd4_decode_channel_attrs4(struct nfsd4_compoundargs *argp,
1607 struct nfsd4_channel_attrs *ca)
1608{
1609 __be32 *p;
1610
1611 p = xdr_inline_decode(argp->xdr, XDR_UNIT * 7);
1612 if (!p)
1613 return nfserr_bad_xdr;
1614
1615
1616 p++;
1617 ca->maxreq_sz = be32_to_cpup(p++);
1618 ca->maxresp_sz = be32_to_cpup(p++);
1619 ca->maxresp_cached = be32_to_cpup(p++);
1620 ca->maxops = be32_to_cpup(p++);
1621 ca->maxreqs = be32_to_cpup(p++);
1622 ca->nr_rdma_attrs = be32_to_cpup(p);
1623 switch (ca->nr_rdma_attrs) {
1624 case 0:
1625 break;
1626 case 1:
1627 if (xdr_stream_decode_u32(argp->xdr, &ca->rdma_attrs) < 0)
1628 return nfserr_bad_xdr;
1629 break;
1630 default:
1631 return nfserr_bad_xdr;
1632 }
1633
1634 return nfs_ok;
1635}
1636
1637static __be32
1638nfsd4_decode_create_session(struct nfsd4_compoundargs *argp,
1639 struct nfsd4_create_session *sess)
1640{
1641 __be32 status;
1642
1643 status = nfsd4_decode_clientid4(argp, &sess->clientid);
1644 if (status)
1645 return status;
1646 if (xdr_stream_decode_u32(argp->xdr, &sess->seqid) < 0)
1647 return nfserr_bad_xdr;
1648 if (xdr_stream_decode_u32(argp->xdr, &sess->flags) < 0)
1649 return nfserr_bad_xdr;
1650 status = nfsd4_decode_channel_attrs4(argp, &sess->fore_channel);
1651 if (status)
1652 return status;
1653 status = nfsd4_decode_channel_attrs4(argp, &sess->back_channel);
1654 if (status)
1655 return status;
1656 if (xdr_stream_decode_u32(argp->xdr, &sess->callback_prog) < 0)
1657 return nfserr_bad_xdr;
1658 status = nfsd4_decode_cb_sec(argp, &sess->cb_sec);
1659 if (status)
1660 return status;
1661
1662 return nfs_ok;
1663}
1664
1665static __be32
1666nfsd4_decode_destroy_session(struct nfsd4_compoundargs *argp,
1667 struct nfsd4_destroy_session *destroy_session)
1668{
1669 return nfsd4_decode_sessionid4(argp, &destroy_session->sessionid);
1670}
1671
1672static __be32
1673nfsd4_decode_free_stateid(struct nfsd4_compoundargs *argp,
1674 struct nfsd4_free_stateid *free_stateid)
1675{
1676 return nfsd4_decode_stateid4(argp, &free_stateid->fr_stateid);
1677}
1678
1679#ifdef CONFIG_NFSD_PNFS
1680static __be32
1681nfsd4_decode_getdeviceinfo(struct nfsd4_compoundargs *argp,
1682 struct nfsd4_getdeviceinfo *gdev)
1683{
1684 __be32 status;
1685
1686 status = nfsd4_decode_deviceid4(argp, &gdev->gd_devid);
1687 if (status)
1688 return status;
1689 if (xdr_stream_decode_u32(argp->xdr, &gdev->gd_layout_type) < 0)
1690 return nfserr_bad_xdr;
1691 if (xdr_stream_decode_u32(argp->xdr, &gdev->gd_maxcount) < 0)
1692 return nfserr_bad_xdr;
1693 if (xdr_stream_decode_uint32_array(argp->xdr,
1694 &gdev->gd_notify_types, 1) < 0)
1695 return nfserr_bad_xdr;
1696
1697 return nfs_ok;
1698}
1699
1700static __be32
1701nfsd4_decode_layoutcommit(struct nfsd4_compoundargs *argp,
1702 struct nfsd4_layoutcommit *lcp)
1703{
1704 __be32 *p, status;
1705
1706 if (xdr_stream_decode_u64(argp->xdr, &lcp->lc_seg.offset) < 0)
1707 return nfserr_bad_xdr;
1708 if (xdr_stream_decode_u64(argp->xdr, &lcp->lc_seg.length) < 0)
1709 return nfserr_bad_xdr;
1710 if (xdr_stream_decode_bool(argp->xdr, &lcp->lc_reclaim) < 0)
1711 return nfserr_bad_xdr;
1712 status = nfsd4_decode_stateid4(argp, &lcp->lc_sid);
1713 if (status)
1714 return status;
1715 if (xdr_stream_decode_u32(argp->xdr, &lcp->lc_newoffset) < 0)
1716 return nfserr_bad_xdr;
1717 if (lcp->lc_newoffset) {
1718 if (xdr_stream_decode_u64(argp->xdr, &lcp->lc_last_wr) < 0)
1719 return nfserr_bad_xdr;
1720 } else
1721 lcp->lc_last_wr = 0;
1722 p = xdr_inline_decode(argp->xdr, XDR_UNIT);
1723 if (!p)
1724 return nfserr_bad_xdr;
1725 if (xdr_item_is_present(p)) {
1726 status = nfsd4_decode_nfstime4(argp, &lcp->lc_mtime);
1727 if (status)
1728 return status;
1729 } else {
1730 lcp->lc_mtime.tv_nsec = UTIME_NOW;
1731 }
1732 return nfsd4_decode_layoutupdate4(argp, lcp);
1733}
1734
1735static __be32
1736nfsd4_decode_layoutget(struct nfsd4_compoundargs *argp,
1737 struct nfsd4_layoutget *lgp)
1738{
1739 __be32 status;
1740
1741 if (xdr_stream_decode_u32(argp->xdr, &lgp->lg_signal) < 0)
1742 return nfserr_bad_xdr;
1743 if (xdr_stream_decode_u32(argp->xdr, &lgp->lg_layout_type) < 0)
1744 return nfserr_bad_xdr;
1745 if (xdr_stream_decode_u32(argp->xdr, &lgp->lg_seg.iomode) < 0)
1746 return nfserr_bad_xdr;
1747 if (xdr_stream_decode_u64(argp->xdr, &lgp->lg_seg.offset) < 0)
1748 return nfserr_bad_xdr;
1749 if (xdr_stream_decode_u64(argp->xdr, &lgp->lg_seg.length) < 0)
1750 return nfserr_bad_xdr;
1751 if (xdr_stream_decode_u64(argp->xdr, &lgp->lg_minlength) < 0)
1752 return nfserr_bad_xdr;
1753 status = nfsd4_decode_stateid4(argp, &lgp->lg_sid);
1754 if (status)
1755 return status;
1756 if (xdr_stream_decode_u32(argp->xdr, &lgp->lg_maxcount) < 0)
1757 return nfserr_bad_xdr;
1758
1759 return nfs_ok;
1760}
1761
1762static __be32
1763nfsd4_decode_layoutreturn(struct nfsd4_compoundargs *argp,
1764 struct nfsd4_layoutreturn *lrp)
1765{
1766 if (xdr_stream_decode_bool(argp->xdr, &lrp->lr_reclaim) < 0)
1767 return nfserr_bad_xdr;
1768 if (xdr_stream_decode_u32(argp->xdr, &lrp->lr_layout_type) < 0)
1769 return nfserr_bad_xdr;
1770 if (xdr_stream_decode_u32(argp->xdr, &lrp->lr_seg.iomode) < 0)
1771 return nfserr_bad_xdr;
1772 return nfsd4_decode_layoutreturn4(argp, lrp);
1773}
1774#endif
1775
1776static __be32 nfsd4_decode_secinfo_no_name(struct nfsd4_compoundargs *argp,
1777 struct nfsd4_secinfo_no_name *sin)
1778{
1779 if (xdr_stream_decode_u32(argp->xdr, &sin->sin_style) < 0)
1780 return nfserr_bad_xdr;
1781 return nfs_ok;
1782}
1783
1784static __be32
1785nfsd4_decode_sequence(struct nfsd4_compoundargs *argp,
1786 struct nfsd4_sequence *seq)
1787{
1788 __be32 *p, status;
1789
1790 status = nfsd4_decode_sessionid4(argp, &seq->sessionid);
1791 if (status)
1792 return status;
1793 p = xdr_inline_decode(argp->xdr, XDR_UNIT * 4);
1794 if (!p)
1795 return nfserr_bad_xdr;
1796 seq->seqid = be32_to_cpup(p++);
1797 seq->slotid = be32_to_cpup(p++);
1798 seq->maxslots = be32_to_cpup(p++);
1799 seq->cachethis = be32_to_cpup(p);
1800
1801 return nfs_ok;
1802}
1803
1804static __be32
1805nfsd4_decode_test_stateid(struct nfsd4_compoundargs *argp, struct nfsd4_test_stateid *test_stateid)
1806{
1807 struct nfsd4_test_stateid_id *stateid;
1808 __be32 status;
1809 u32 i;
1810
1811 if (xdr_stream_decode_u32(argp->xdr, &test_stateid->ts_num_ids) < 0)
1812 return nfserr_bad_xdr;
1813
1814 INIT_LIST_HEAD(&test_stateid->ts_stateid_list);
1815 for (i = 0; i < test_stateid->ts_num_ids; i++) {
1816 stateid = svcxdr_tmpalloc(argp, sizeof(*stateid));
1817 if (!stateid)
1818 return nfserrno(-ENOMEM);
1819 INIT_LIST_HEAD(&stateid->ts_id_list);
1820 list_add_tail(&stateid->ts_id_list, &test_stateid->ts_stateid_list);
1821 status = nfsd4_decode_stateid4(argp, &stateid->ts_id_stateid);
1822 if (status)
1823 return status;
1824 }
1825
1826 return nfs_ok;
1827}
1828
1829static __be32 nfsd4_decode_destroy_clientid(struct nfsd4_compoundargs *argp,
1830 struct nfsd4_destroy_clientid *dc)
1831{
1832 return nfsd4_decode_clientid4(argp, &dc->clientid);
1833}
1834
1835static __be32 nfsd4_decode_reclaim_complete(struct nfsd4_compoundargs *argp,
1836 struct nfsd4_reclaim_complete *rc)
1837{
1838 if (xdr_stream_decode_bool(argp->xdr, &rc->rca_one_fs) < 0)
1839 return nfserr_bad_xdr;
1840 return nfs_ok;
1841}
1842
1843static __be32
1844nfsd4_decode_fallocate(struct nfsd4_compoundargs *argp,
1845 struct nfsd4_fallocate *fallocate)
1846{
1847 __be32 status;
1848
1849 status = nfsd4_decode_stateid4(argp, &fallocate->falloc_stateid);
1850 if (status)
1851 return status;
1852 if (xdr_stream_decode_u64(argp->xdr, &fallocate->falloc_offset) < 0)
1853 return nfserr_bad_xdr;
1854 if (xdr_stream_decode_u64(argp->xdr, &fallocate->falloc_length) < 0)
1855 return nfserr_bad_xdr;
1856
1857 return nfs_ok;
1858}
1859
1860static __be32 nfsd4_decode_nl4_server(struct nfsd4_compoundargs *argp,
1861 struct nl4_server *ns)
1862{
1863 struct nfs42_netaddr *naddr;
1864 __be32 *p;
1865
1866 if (xdr_stream_decode_u32(argp->xdr, &ns->nl4_type) < 0)
1867 return nfserr_bad_xdr;
1868
1869
1870 switch (ns->nl4_type) {
1871 case NL4_NETADDR:
1872 naddr = &ns->u.nl4_addr;
1873
1874 if (xdr_stream_decode_u32(argp->xdr, &naddr->netid_len) < 0)
1875 return nfserr_bad_xdr;
1876 if (naddr->netid_len > RPCBIND_MAXNETIDLEN)
1877 return nfserr_bad_xdr;
1878
1879 p = xdr_inline_decode(argp->xdr, naddr->netid_len);
1880 if (!p)
1881 return nfserr_bad_xdr;
1882 memcpy(naddr->netid, p, naddr->netid_len);
1883
1884 if (xdr_stream_decode_u32(argp->xdr, &naddr->addr_len) < 0)
1885 return nfserr_bad_xdr;
1886 if (naddr->addr_len > RPCBIND_MAXUADDRLEN)
1887 return nfserr_bad_xdr;
1888
1889 p = xdr_inline_decode(argp->xdr, naddr->addr_len);
1890 if (!p)
1891 return nfserr_bad_xdr;
1892 memcpy(naddr->addr, p, naddr->addr_len);
1893 break;
1894 default:
1895 return nfserr_bad_xdr;
1896 }
1897
1898 return nfs_ok;
1899}
1900
1901static __be32
1902nfsd4_decode_copy(struct nfsd4_compoundargs *argp, struct nfsd4_copy *copy)
1903{
1904 struct nl4_server *ns_dummy;
1905 u32 consecutive, i, count;
1906 __be32 status;
1907
1908 status = nfsd4_decode_stateid4(argp, ©->cp_src_stateid);
1909 if (status)
1910 return status;
1911 status = nfsd4_decode_stateid4(argp, ©->cp_dst_stateid);
1912 if (status)
1913 return status;
1914 if (xdr_stream_decode_u64(argp->xdr, ©->cp_src_pos) < 0)
1915 return nfserr_bad_xdr;
1916 if (xdr_stream_decode_u64(argp->xdr, ©->cp_dst_pos) < 0)
1917 return nfserr_bad_xdr;
1918 if (xdr_stream_decode_u64(argp->xdr, ©->cp_count) < 0)
1919 return nfserr_bad_xdr;
1920
1921 if (xdr_stream_decode_u32(argp->xdr, &consecutive) < 0)
1922 return nfserr_bad_xdr;
1923 if (xdr_stream_decode_u32(argp->xdr, ©->cp_synchronous) < 0)
1924 return nfserr_bad_xdr;
1925
1926 if (xdr_stream_decode_u32(argp->xdr, &count) < 0)
1927 return nfserr_bad_xdr;
1928 copy->cp_intra = false;
1929 if (count == 0) {
1930 copy->cp_intra = true;
1931 return nfs_ok;
1932 }
1933
1934
1935 status = nfsd4_decode_nl4_server(argp, ©->cp_src);
1936 if (status)
1937 return status;
1938
1939 ns_dummy = kmalloc(sizeof(struct nl4_server), GFP_KERNEL);
1940 if (ns_dummy == NULL)
1941 return nfserrno(-ENOMEM);
1942 for (i = 0; i < count - 1; i++) {
1943 status = nfsd4_decode_nl4_server(argp, ns_dummy);
1944 if (status) {
1945 kfree(ns_dummy);
1946 return status;
1947 }
1948 }
1949 kfree(ns_dummy);
1950
1951 return nfs_ok;
1952}
1953
1954static __be32
1955nfsd4_decode_copy_notify(struct nfsd4_compoundargs *argp,
1956 struct nfsd4_copy_notify *cn)
1957{
1958 __be32 status;
1959
1960 status = nfsd4_decode_stateid4(argp, &cn->cpn_src_stateid);
1961 if (status)
1962 return status;
1963 return nfsd4_decode_nl4_server(argp, &cn->cpn_dst);
1964}
1965
1966static __be32
1967nfsd4_decode_offload_status(struct nfsd4_compoundargs *argp,
1968 struct nfsd4_offload_status *os)
1969{
1970 return nfsd4_decode_stateid4(argp, &os->stateid);
1971}
1972
1973static __be32
1974nfsd4_decode_seek(struct nfsd4_compoundargs *argp, struct nfsd4_seek *seek)
1975{
1976 __be32 status;
1977
1978 status = nfsd4_decode_stateid4(argp, &seek->seek_stateid);
1979 if (status)
1980 return status;
1981 if (xdr_stream_decode_u64(argp->xdr, &seek->seek_offset) < 0)
1982 return nfserr_bad_xdr;
1983 if (xdr_stream_decode_u32(argp->xdr, &seek->seek_whence) < 0)
1984 return nfserr_bad_xdr;
1985
1986 return nfs_ok;
1987}
1988
1989static __be32
1990nfsd4_decode_clone(struct nfsd4_compoundargs *argp, struct nfsd4_clone *clone)
1991{
1992 __be32 status;
1993
1994 status = nfsd4_decode_stateid4(argp, &clone->cl_src_stateid);
1995 if (status)
1996 return status;
1997 status = nfsd4_decode_stateid4(argp, &clone->cl_dst_stateid);
1998 if (status)
1999 return status;
2000 if (xdr_stream_decode_u64(argp->xdr, &clone->cl_src_pos) < 0)
2001 return nfserr_bad_xdr;
2002 if (xdr_stream_decode_u64(argp->xdr, &clone->cl_dst_pos) < 0)
2003 return nfserr_bad_xdr;
2004 if (xdr_stream_decode_u64(argp->xdr, &clone->cl_count) < 0)
2005 return nfserr_bad_xdr;
2006
2007 return nfs_ok;
2008}
2009
2010
2011
2012
2013
2014
2015
2016
2017
2018
2019
2020
2021
2022static __be32
2023nfsd4_vbuf_from_vector(struct nfsd4_compoundargs *argp, struct xdr_buf *xdr,
2024 char **bufp, u32 buflen)
2025{
2026 struct page **pages = xdr->pages;
2027 struct kvec *head = xdr->head;
2028 char *tmp, *dp;
2029 u32 len;
2030
2031 if (buflen <= head->iov_len) {
2032
2033
2034
2035
2036 *bufp = head->iov_base;
2037 return 0;
2038 }
2039
2040 tmp = svcxdr_tmpalloc(argp, buflen);
2041 if (tmp == NULL)
2042 return nfserr_jukebox;
2043
2044 dp = tmp;
2045 memcpy(dp, head->iov_base, head->iov_len);
2046 buflen -= head->iov_len;
2047 dp += head->iov_len;
2048
2049 while (buflen > 0) {
2050 len = min_t(u32, buflen, PAGE_SIZE);
2051 memcpy(dp, page_address(*pages), len);
2052
2053 buflen -= len;
2054 dp += len;
2055 pages++;
2056 }
2057
2058 *bufp = tmp;
2059 return 0;
2060}
2061
2062
2063
2064
2065
2066
2067static __be32
2068nfsd4_decode_xattr_name(struct nfsd4_compoundargs *argp, char **namep)
2069{
2070 char *name, *sp, *dp;
2071 u32 namelen, cnt;
2072 __be32 *p;
2073
2074 if (xdr_stream_decode_u32(argp->xdr, &namelen) < 0)
2075 return nfserr_bad_xdr;
2076 if (namelen > (XATTR_NAME_MAX - XATTR_USER_PREFIX_LEN))
2077 return nfserr_nametoolong;
2078 if (namelen == 0)
2079 return nfserr_bad_xdr;
2080 p = xdr_inline_decode(argp->xdr, namelen);
2081 if (!p)
2082 return nfserr_bad_xdr;
2083 name = svcxdr_tmpalloc(argp, namelen + XATTR_USER_PREFIX_LEN + 1);
2084 if (!name)
2085 return nfserr_jukebox;
2086 memcpy(name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN);
2087
2088
2089
2090
2091
2092 sp = (char *)p;
2093 dp = name + XATTR_USER_PREFIX_LEN;
2094 cnt = namelen;
2095
2096 while (cnt-- > 0) {
2097 if (*sp == '\0')
2098 return nfserr_bad_xdr;
2099 *dp++ = *sp++;
2100 }
2101 *dp = '\0';
2102
2103 *namep = name;
2104
2105 return nfs_ok;
2106}
2107
2108
2109
2110
2111
2112
2113
2114static __be32
2115nfsd4_decode_getxattr(struct nfsd4_compoundargs *argp,
2116 struct nfsd4_getxattr *getxattr)
2117{
2118 __be32 status;
2119 u32 maxcount;
2120
2121 status = nfsd4_decode_xattr_name(argp, &getxattr->getxa_name);
2122 if (status)
2123 return status;
2124
2125 maxcount = svc_max_payload(argp->rqstp);
2126 maxcount = min_t(u32, XATTR_SIZE_MAX, maxcount);
2127
2128 getxattr->getxa_len = maxcount;
2129
2130 return status;
2131}
2132
2133static __be32
2134nfsd4_decode_setxattr(struct nfsd4_compoundargs *argp,
2135 struct nfsd4_setxattr *setxattr)
2136{
2137 u32 flags, maxcount, size;
2138 __be32 status;
2139
2140 if (xdr_stream_decode_u32(argp->xdr, &flags) < 0)
2141 return nfserr_bad_xdr;
2142
2143 if (flags > SETXATTR4_REPLACE)
2144 return nfserr_inval;
2145 setxattr->setxa_flags = flags;
2146
2147 status = nfsd4_decode_xattr_name(argp, &setxattr->setxa_name);
2148 if (status)
2149 return status;
2150
2151 maxcount = svc_max_payload(argp->rqstp);
2152 maxcount = min_t(u32, XATTR_SIZE_MAX, maxcount);
2153
2154 if (xdr_stream_decode_u32(argp->xdr, &size) < 0)
2155 return nfserr_bad_xdr;
2156 if (size > maxcount)
2157 return nfserr_xattr2big;
2158
2159 setxattr->setxa_len = size;
2160 if (size > 0) {
2161 struct xdr_buf payload;
2162
2163 if (!xdr_stream_subsegment(argp->xdr, &payload, size))
2164 return nfserr_bad_xdr;
2165 status = nfsd4_vbuf_from_vector(argp, &payload,
2166 &setxattr->setxa_buf, size);
2167 }
2168
2169 return nfs_ok;
2170}
2171
2172static __be32
2173nfsd4_decode_listxattrs(struct nfsd4_compoundargs *argp,
2174 struct nfsd4_listxattrs *listxattrs)
2175{
2176 u32 maxcount;
2177
2178 if (xdr_stream_decode_u64(argp->xdr, &listxattrs->lsxa_cookie) < 0)
2179 return nfserr_bad_xdr;
2180
2181
2182
2183
2184
2185 if (listxattrs->lsxa_cookie >=
2186 (XATTR_LIST_MAX / (XATTR_USER_PREFIX_LEN + 2)))
2187 return nfserr_badcookie;
2188
2189 if (xdr_stream_decode_u32(argp->xdr, &maxcount) < 0)
2190 return nfserr_bad_xdr;
2191 if (maxcount < 8)
2192
2193 return nfserr_inval;
2194
2195 maxcount = min(maxcount, svc_max_payload(argp->rqstp));
2196 listxattrs->lsxa_maxcount = maxcount;
2197
2198 return nfs_ok;
2199}
2200
2201static __be32
2202nfsd4_decode_removexattr(struct nfsd4_compoundargs *argp,
2203 struct nfsd4_removexattr *removexattr)
2204{
2205 return nfsd4_decode_xattr_name(argp, &removexattr->rmxa_name);
2206}
2207
2208static __be32
2209nfsd4_decode_noop(struct nfsd4_compoundargs *argp, void *p)
2210{
2211 return nfs_ok;
2212}
2213
2214static __be32
2215nfsd4_decode_notsupp(struct nfsd4_compoundargs *argp, void *p)
2216{
2217 return nfserr_notsupp;
2218}
2219
2220typedef __be32(*nfsd4_dec)(struct nfsd4_compoundargs *argp, void *);
2221
2222static const nfsd4_dec nfsd4_dec_ops[] = {
2223 [OP_ACCESS] = (nfsd4_dec)nfsd4_decode_access,
2224 [OP_CLOSE] = (nfsd4_dec)nfsd4_decode_close,
2225 [OP_COMMIT] = (nfsd4_dec)nfsd4_decode_commit,
2226 [OP_CREATE] = (nfsd4_dec)nfsd4_decode_create,
2227 [OP_DELEGPURGE] = (nfsd4_dec)nfsd4_decode_notsupp,
2228 [OP_DELEGRETURN] = (nfsd4_dec)nfsd4_decode_delegreturn,
2229 [OP_GETATTR] = (nfsd4_dec)nfsd4_decode_getattr,
2230 [OP_GETFH] = (nfsd4_dec)nfsd4_decode_noop,
2231 [OP_LINK] = (nfsd4_dec)nfsd4_decode_link,
2232 [OP_LOCK] = (nfsd4_dec)nfsd4_decode_lock,
2233 [OP_LOCKT] = (nfsd4_dec)nfsd4_decode_lockt,
2234 [OP_LOCKU] = (nfsd4_dec)nfsd4_decode_locku,
2235 [OP_LOOKUP] = (nfsd4_dec)nfsd4_decode_lookup,
2236 [OP_LOOKUPP] = (nfsd4_dec)nfsd4_decode_noop,
2237 [OP_NVERIFY] = (nfsd4_dec)nfsd4_decode_verify,
2238 [OP_OPEN] = (nfsd4_dec)nfsd4_decode_open,
2239 [OP_OPENATTR] = (nfsd4_dec)nfsd4_decode_notsupp,
2240 [OP_OPEN_CONFIRM] = (nfsd4_dec)nfsd4_decode_open_confirm,
2241 [OP_OPEN_DOWNGRADE] = (nfsd4_dec)nfsd4_decode_open_downgrade,
2242 [OP_PUTFH] = (nfsd4_dec)nfsd4_decode_putfh,
2243 [OP_PUTPUBFH] = (nfsd4_dec)nfsd4_decode_putpubfh,
2244 [OP_PUTROOTFH] = (nfsd4_dec)nfsd4_decode_noop,
2245 [OP_READ] = (nfsd4_dec)nfsd4_decode_read,
2246 [OP_READDIR] = (nfsd4_dec)nfsd4_decode_readdir,
2247 [OP_READLINK] = (nfsd4_dec)nfsd4_decode_noop,
2248 [OP_REMOVE] = (nfsd4_dec)nfsd4_decode_remove,
2249 [OP_RENAME] = (nfsd4_dec)nfsd4_decode_rename,
2250 [OP_RENEW] = (nfsd4_dec)nfsd4_decode_renew,
2251 [OP_RESTOREFH] = (nfsd4_dec)nfsd4_decode_noop,
2252 [OP_SAVEFH] = (nfsd4_dec)nfsd4_decode_noop,
2253 [OP_SECINFO] = (nfsd4_dec)nfsd4_decode_secinfo,
2254 [OP_SETATTR] = (nfsd4_dec)nfsd4_decode_setattr,
2255 [OP_SETCLIENTID] = (nfsd4_dec)nfsd4_decode_setclientid,
2256 [OP_SETCLIENTID_CONFIRM] = (nfsd4_dec)nfsd4_decode_setclientid_confirm,
2257 [OP_VERIFY] = (nfsd4_dec)nfsd4_decode_verify,
2258 [OP_WRITE] = (nfsd4_dec)nfsd4_decode_write,
2259 [OP_RELEASE_LOCKOWNER] = (nfsd4_dec)nfsd4_decode_release_lockowner,
2260
2261
2262 [OP_BACKCHANNEL_CTL] = (nfsd4_dec)nfsd4_decode_backchannel_ctl,
2263 [OP_BIND_CONN_TO_SESSION]= (nfsd4_dec)nfsd4_decode_bind_conn_to_session,
2264 [OP_EXCHANGE_ID] = (nfsd4_dec)nfsd4_decode_exchange_id,
2265 [OP_CREATE_SESSION] = (nfsd4_dec)nfsd4_decode_create_session,
2266 [OP_DESTROY_SESSION] = (nfsd4_dec)nfsd4_decode_destroy_session,
2267 [OP_FREE_STATEID] = (nfsd4_dec)nfsd4_decode_free_stateid,
2268 [OP_GET_DIR_DELEGATION] = (nfsd4_dec)nfsd4_decode_notsupp,
2269#ifdef CONFIG_NFSD_PNFS
2270 [OP_GETDEVICEINFO] = (nfsd4_dec)nfsd4_decode_getdeviceinfo,
2271 [OP_GETDEVICELIST] = (nfsd4_dec)nfsd4_decode_notsupp,
2272 [OP_LAYOUTCOMMIT] = (nfsd4_dec)nfsd4_decode_layoutcommit,
2273 [OP_LAYOUTGET] = (nfsd4_dec)nfsd4_decode_layoutget,
2274 [OP_LAYOUTRETURN] = (nfsd4_dec)nfsd4_decode_layoutreturn,
2275#else
2276 [OP_GETDEVICEINFO] = (nfsd4_dec)nfsd4_decode_notsupp,
2277 [OP_GETDEVICELIST] = (nfsd4_dec)nfsd4_decode_notsupp,
2278 [OP_LAYOUTCOMMIT] = (nfsd4_dec)nfsd4_decode_notsupp,
2279 [OP_LAYOUTGET] = (nfsd4_dec)nfsd4_decode_notsupp,
2280 [OP_LAYOUTRETURN] = (nfsd4_dec)nfsd4_decode_notsupp,
2281#endif
2282 [OP_SECINFO_NO_NAME] = (nfsd4_dec)nfsd4_decode_secinfo_no_name,
2283 [OP_SEQUENCE] = (nfsd4_dec)nfsd4_decode_sequence,
2284 [OP_SET_SSV] = (nfsd4_dec)nfsd4_decode_notsupp,
2285 [OP_TEST_STATEID] = (nfsd4_dec)nfsd4_decode_test_stateid,
2286 [OP_WANT_DELEGATION] = (nfsd4_dec)nfsd4_decode_notsupp,
2287 [OP_DESTROY_CLIENTID] = (nfsd4_dec)nfsd4_decode_destroy_clientid,
2288 [OP_RECLAIM_COMPLETE] = (nfsd4_dec)nfsd4_decode_reclaim_complete,
2289
2290
2291 [OP_ALLOCATE] = (nfsd4_dec)nfsd4_decode_fallocate,
2292 [OP_COPY] = (nfsd4_dec)nfsd4_decode_copy,
2293 [OP_COPY_NOTIFY] = (nfsd4_dec)nfsd4_decode_copy_notify,
2294 [OP_DEALLOCATE] = (nfsd4_dec)nfsd4_decode_fallocate,
2295 [OP_IO_ADVISE] = (nfsd4_dec)nfsd4_decode_notsupp,
2296 [OP_LAYOUTERROR] = (nfsd4_dec)nfsd4_decode_notsupp,
2297 [OP_LAYOUTSTATS] = (nfsd4_dec)nfsd4_decode_notsupp,
2298 [OP_OFFLOAD_CANCEL] = (nfsd4_dec)nfsd4_decode_offload_status,
2299 [OP_OFFLOAD_STATUS] = (nfsd4_dec)nfsd4_decode_offload_status,
2300 [OP_READ_PLUS] = (nfsd4_dec)nfsd4_decode_read,
2301 [OP_SEEK] = (nfsd4_dec)nfsd4_decode_seek,
2302 [OP_WRITE_SAME] = (nfsd4_dec)nfsd4_decode_notsupp,
2303 [OP_CLONE] = (nfsd4_dec)nfsd4_decode_clone,
2304
2305 [OP_GETXATTR] = (nfsd4_dec)nfsd4_decode_getxattr,
2306 [OP_SETXATTR] = (nfsd4_dec)nfsd4_decode_setxattr,
2307 [OP_LISTXATTRS] = (nfsd4_dec)nfsd4_decode_listxattrs,
2308 [OP_REMOVEXATTR] = (nfsd4_dec)nfsd4_decode_removexattr,
2309};
2310
2311static inline bool
2312nfsd4_opnum_in_range(struct nfsd4_compoundargs *argp, struct nfsd4_op *op)
2313{
2314 if (op->opnum < FIRST_NFS4_OP)
2315 return false;
2316 else if (argp->minorversion == 0 && op->opnum > LAST_NFS40_OP)
2317 return false;
2318 else if (argp->minorversion == 1 && op->opnum > LAST_NFS41_OP)
2319 return false;
2320 else if (argp->minorversion == 2 && op->opnum > LAST_NFS42_OP)
2321 return false;
2322 return true;
2323}
2324
2325static int
2326nfsd4_decode_compound(struct nfsd4_compoundargs *argp)
2327{
2328 struct nfsd4_op *op;
2329 bool cachethis = false;
2330 int auth_slack= argp->rqstp->rq_auth_slack;
2331 int max_reply = auth_slack + 8;
2332 int readcount = 0;
2333 int readbytes = 0;
2334 __be32 *p;
2335 int i;
2336
2337 if (xdr_stream_decode_u32(argp->xdr, &argp->taglen) < 0)
2338 return 0;
2339 max_reply += XDR_UNIT;
2340 argp->tag = NULL;
2341 if (unlikely(argp->taglen)) {
2342 if (argp->taglen > NFSD4_MAX_TAGLEN)
2343 return 0;
2344 p = xdr_inline_decode(argp->xdr, argp->taglen);
2345 if (!p)
2346 return 0;
2347 argp->tag = svcxdr_savemem(argp, p, argp->taglen);
2348 if (!argp->tag)
2349 return 0;
2350 max_reply += xdr_align_size(argp->taglen);
2351 }
2352
2353 if (xdr_stream_decode_u32(argp->xdr, &argp->minorversion) < 0)
2354 return 0;
2355 if (xdr_stream_decode_u32(argp->xdr, &argp->opcnt) < 0)
2356 return 0;
2357
2358
2359
2360
2361
2362
2363 if (argp->opcnt > NFSD_MAX_OPS_PER_COMPOUND)
2364 return 1;
2365
2366 if (argp->opcnt > ARRAY_SIZE(argp->iops)) {
2367 argp->ops = kzalloc(argp->opcnt * sizeof(*argp->ops), GFP_KERNEL);
2368 if (!argp->ops) {
2369 argp->ops = argp->iops;
2370 dprintk("nfsd: couldn't allocate room for COMPOUND\n");
2371 return 0;
2372 }
2373 }
2374
2375 if (argp->minorversion > NFSD_SUPPORTED_MINOR_VERSION)
2376 argp->opcnt = 0;
2377
2378 for (i = 0; i < argp->opcnt; i++) {
2379 op = &argp->ops[i];
2380 op->replay = NULL;
2381
2382 if (xdr_stream_decode_u32(argp->xdr, &op->opnum) < 0)
2383 return 0;
2384 if (nfsd4_opnum_in_range(argp, op)) {
2385 op->status = nfsd4_dec_ops[op->opnum](argp, &op->u);
2386 if (op->status != nfs_ok)
2387 trace_nfsd_compound_decode_err(argp->rqstp,
2388 argp->opcnt, i,
2389 op->opnum,
2390 op->status);
2391 } else {
2392 op->opnum = OP_ILLEGAL;
2393 op->status = nfserr_op_illegal;
2394 }
2395 op->opdesc = OPDESC(op);
2396
2397
2398
2399
2400 cachethis |= nfsd4_cache_this_op(op);
2401
2402 if (op->opnum == OP_READ || op->opnum == OP_READ_PLUS) {
2403 readcount++;
2404 readbytes += nfsd4_max_reply(argp->rqstp, op);
2405 } else
2406 max_reply += nfsd4_max_reply(argp->rqstp, op);
2407
2408
2409
2410
2411
2412
2413 if (op->opnum == OP_LOCK || op->opnum == OP_LOCKT)
2414 max_reply += NFS4_OPAQUE_LIMIT;
2415
2416 if (op->status) {
2417 argp->opcnt = i+1;
2418 break;
2419 }
2420 }
2421
2422 if (argp->minorversion)
2423 cachethis = false;
2424 svc_reserve(argp->rqstp, max_reply + readbytes);
2425 argp->rqstp->rq_cachetype = cachethis ? RC_REPLBUFF : RC_NOCACHE;
2426
2427 if (readcount > 1 || max_reply > PAGE_SIZE - auth_slack)
2428 clear_bit(RQ_SPLICE_OK, &argp->rqstp->rq_flags);
2429
2430 return 1;
2431}
2432
2433static __be32 *encode_change(__be32 *p, struct kstat *stat, struct inode *inode,
2434 struct svc_export *exp)
2435{
2436 if (exp->ex_flags & NFSEXP_V4ROOT) {
2437 *p++ = cpu_to_be32(convert_to_wallclock(exp->cd->flush_time));
2438 *p++ = 0;
2439 } else
2440 p = xdr_encode_hyper(p, nfsd4_change_attribute(stat, inode));
2441 return p;
2442}
2443
2444
2445
2446
2447
2448
2449
2450
2451
2452
2453
2454
2455static __be32 *encode_time_delta(__be32 *p, struct inode *inode)
2456{
2457 struct timespec64 ts;
2458 u32 ns;
2459
2460 ns = max_t(u32, NSEC_PER_SEC/HZ, inode->i_sb->s_time_gran);
2461 ts = ns_to_timespec64(ns);
2462
2463 p = xdr_encode_hyper(p, ts.tv_sec);
2464 *p++ = cpu_to_be32(ts.tv_nsec);
2465
2466 return p;
2467}
2468
2469static __be32 *encode_cinfo(__be32 *p, struct nfsd4_change_info *c)
2470{
2471 *p++ = cpu_to_be32(c->atomic);
2472 p = xdr_encode_hyper(p, c->before_change);
2473 p = xdr_encode_hyper(p, c->after_change);
2474 return p;
2475}
2476
2477
2478
2479
2480static __be32 nfsd4_encode_components_esc(struct xdr_stream *xdr, char sep,
2481 char *components, char esc_enter,
2482 char esc_exit)
2483{
2484 __be32 *p;
2485 __be32 pathlen;
2486 int pathlen_offset;
2487 int strlen, count=0;
2488 char *str, *end, *next;
2489
2490 dprintk("nfsd4_encode_components(%s)\n", components);
2491
2492 pathlen_offset = xdr->buf->len;
2493 p = xdr_reserve_space(xdr, 4);
2494 if (!p)
2495 return nfserr_resource;
2496 p++;
2497
2498 end = str = components;
2499 while (*end) {
2500 bool found_esc = false;
2501
2502
2503 if (*str == esc_enter) {
2504 for (; *end && (*end != esc_exit); end++)
2505 ;
2506 next = end + 1;
2507 if (*end && (!*next || *next == sep)) {
2508 str++;
2509 found_esc = true;
2510 }
2511 }
2512
2513 if (!found_esc)
2514 for (; *end && (*end != sep); end++)
2515 ;
2516
2517 strlen = end - str;
2518 if (strlen) {
2519 p = xdr_reserve_space(xdr, strlen + 4);
2520 if (!p)
2521 return nfserr_resource;
2522 p = xdr_encode_opaque(p, str, strlen);
2523 count++;
2524 }
2525 else
2526 end++;
2527 if (found_esc)
2528 end = next;
2529
2530 str = end;
2531 }
2532 pathlen = htonl(count);
2533 write_bytes_to_xdr_buf(xdr->buf, pathlen_offset, &pathlen, 4);
2534 return 0;
2535}
2536
2537
2538
2539
2540static __be32 nfsd4_encode_components(struct xdr_stream *xdr, char sep,
2541 char *components)
2542{
2543 return nfsd4_encode_components_esc(xdr, sep, components, 0, 0);
2544}
2545
2546
2547
2548
2549static __be32 nfsd4_encode_fs_location4(struct xdr_stream *xdr,
2550 struct nfsd4_fs_location *location)
2551{
2552 __be32 status;
2553
2554 status = nfsd4_encode_components_esc(xdr, ':', location->hosts,
2555 '[', ']');
2556 if (status)
2557 return status;
2558 status = nfsd4_encode_components(xdr, '/', location->path);
2559 if (status)
2560 return status;
2561 return 0;
2562}
2563
2564
2565
2566
2567static __be32 nfsd4_encode_path(struct xdr_stream *xdr,
2568 const struct path *root,
2569 const struct path *path)
2570{
2571 struct path cur = *path;
2572 __be32 *p;
2573 struct dentry **components = NULL;
2574 unsigned int ncomponents = 0;
2575 __be32 err = nfserr_jukebox;
2576
2577 dprintk("nfsd4_encode_components(");
2578
2579 path_get(&cur);
2580
2581
2582
2583 for (;;) {
2584 if (path_equal(&cur, root))
2585 break;
2586 if (cur.dentry == cur.mnt->mnt_root) {
2587 if (follow_up(&cur))
2588 continue;
2589 goto out_free;
2590 }
2591 if ((ncomponents & 15) == 0) {
2592 struct dentry **new;
2593 new = krealloc(components,
2594 sizeof(*new) * (ncomponents + 16),
2595 GFP_KERNEL);
2596 if (!new)
2597 goto out_free;
2598 components = new;
2599 }
2600 components[ncomponents++] = cur.dentry;
2601 cur.dentry = dget_parent(cur.dentry);
2602 }
2603 err = nfserr_resource;
2604 p = xdr_reserve_space(xdr, 4);
2605 if (!p)
2606 goto out_free;
2607 *p++ = cpu_to_be32(ncomponents);
2608
2609 while (ncomponents) {
2610 struct dentry *dentry = components[ncomponents - 1];
2611 unsigned int len;
2612
2613 spin_lock(&dentry->d_lock);
2614 len = dentry->d_name.len;
2615 p = xdr_reserve_space(xdr, len + 4);
2616 if (!p) {
2617 spin_unlock(&dentry->d_lock);
2618 goto out_free;
2619 }
2620 p = xdr_encode_opaque(p, dentry->d_name.name, len);
2621 dprintk("/%pd", dentry);
2622 spin_unlock(&dentry->d_lock);
2623 dput(dentry);
2624 ncomponents--;
2625 }
2626
2627 err = 0;
2628out_free:
2629 dprintk(")\n");
2630 while (ncomponents)
2631 dput(components[--ncomponents]);
2632 kfree(components);
2633 path_put(&cur);
2634 return err;
2635}
2636
2637static __be32 nfsd4_encode_fsloc_fsroot(struct xdr_stream *xdr,
2638 struct svc_rqst *rqstp, const struct path *path)
2639{
2640 struct svc_export *exp_ps;
2641 __be32 res;
2642
2643 exp_ps = rqst_find_fsidzero_export(rqstp);
2644 if (IS_ERR(exp_ps))
2645 return nfserrno(PTR_ERR(exp_ps));
2646 res = nfsd4_encode_path(xdr, &exp_ps->ex_path, path);
2647 exp_put(exp_ps);
2648 return res;
2649}
2650
2651
2652
2653
2654static __be32 nfsd4_encode_fs_locations(struct xdr_stream *xdr,
2655 struct svc_rqst *rqstp, struct svc_export *exp)
2656{
2657 __be32 status;
2658 int i;
2659 __be32 *p;
2660 struct nfsd4_fs_locations *fslocs = &exp->ex_fslocs;
2661
2662 status = nfsd4_encode_fsloc_fsroot(xdr, rqstp, &exp->ex_path);
2663 if (status)
2664 return status;
2665 p = xdr_reserve_space(xdr, 4);
2666 if (!p)
2667 return nfserr_resource;
2668 *p++ = cpu_to_be32(fslocs->locations_count);
2669 for (i=0; i<fslocs->locations_count; i++) {
2670 status = nfsd4_encode_fs_location4(xdr, &fslocs->locations[i]);
2671 if (status)
2672 return status;
2673 }
2674 return 0;
2675}
2676
2677static u32 nfs4_file_type(umode_t mode)
2678{
2679 switch (mode & S_IFMT) {
2680 case S_IFIFO: return NF4FIFO;
2681 case S_IFCHR: return NF4CHR;
2682 case S_IFDIR: return NF4DIR;
2683 case S_IFBLK: return NF4BLK;
2684 case S_IFLNK: return NF4LNK;
2685 case S_IFREG: return NF4REG;
2686 case S_IFSOCK: return NF4SOCK;
2687 default: return NF4BAD;
2688 }
2689}
2690
2691static inline __be32
2692nfsd4_encode_aclname(struct xdr_stream *xdr, struct svc_rqst *rqstp,
2693 struct nfs4_ace *ace)
2694{
2695 if (ace->whotype != NFS4_ACL_WHO_NAMED)
2696 return nfs4_acl_write_who(xdr, ace->whotype);
2697 else if (ace->flag & NFS4_ACE_IDENTIFIER_GROUP)
2698 return nfsd4_encode_group(xdr, rqstp, ace->who_gid);
2699 else
2700 return nfsd4_encode_user(xdr, rqstp, ace->who_uid);
2701}
2702
2703static inline __be32
2704nfsd4_encode_layout_types(struct xdr_stream *xdr, u32 layout_types)
2705{
2706 __be32 *p;
2707 unsigned long i = hweight_long(layout_types);
2708
2709 p = xdr_reserve_space(xdr, 4 + 4 * i);
2710 if (!p)
2711 return nfserr_resource;
2712
2713 *p++ = cpu_to_be32(i);
2714
2715 for (i = LAYOUT_NFSV4_1_FILES; i < LAYOUT_TYPE_MAX; ++i)
2716 if (layout_types & (1 << i))
2717 *p++ = cpu_to_be32(i);
2718
2719 return 0;
2720}
2721
2722#define WORD0_ABSENT_FS_ATTRS (FATTR4_WORD0_FS_LOCATIONS | FATTR4_WORD0_FSID | \
2723 FATTR4_WORD0_RDATTR_ERROR)
2724#define WORD1_ABSENT_FS_ATTRS FATTR4_WORD1_MOUNTED_ON_FILEID
2725#define WORD2_ABSENT_FS_ATTRS 0
2726
2727#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
2728static inline __be32
2729nfsd4_encode_security_label(struct xdr_stream *xdr, struct svc_rqst *rqstp,
2730 void *context, int len)
2731{
2732 __be32 *p;
2733
2734 p = xdr_reserve_space(xdr, len + 4 + 4 + 4);
2735 if (!p)
2736 return nfserr_resource;
2737
2738
2739
2740
2741
2742 *p++ = cpu_to_be32(0);
2743 *p++ = cpu_to_be32(0);
2744 p = xdr_encode_opaque(p, context, len);
2745 return 0;
2746}
2747#else
2748static inline __be32
2749nfsd4_encode_security_label(struct xdr_stream *xdr, struct svc_rqst *rqstp,
2750 void *context, int len)
2751{ return 0; }
2752#endif
2753
2754static __be32 fattr_handle_absent_fs(u32 *bmval0, u32 *bmval1, u32 *bmval2, u32 *rdattr_err)
2755{
2756
2757 if (*bmval0 & ~WORD0_ABSENT_FS_ATTRS ||
2758 *bmval1 & ~WORD1_ABSENT_FS_ATTRS) {
2759 if (*bmval0 & FATTR4_WORD0_RDATTR_ERROR ||
2760 *bmval0 & FATTR4_WORD0_FS_LOCATIONS)
2761 *rdattr_err = NFSERR_MOVED;
2762 else
2763 return nfserr_moved;
2764 }
2765 *bmval0 &= WORD0_ABSENT_FS_ATTRS;
2766 *bmval1 &= WORD1_ABSENT_FS_ATTRS;
2767 *bmval2 &= WORD2_ABSENT_FS_ATTRS;
2768 return 0;
2769}
2770
2771
2772static int get_parent_attributes(struct svc_export *exp, struct kstat *stat)
2773{
2774 struct path path = exp->ex_path;
2775 int err;
2776
2777 path_get(&path);
2778 while (follow_up(&path)) {
2779 if (path.dentry != path.mnt->mnt_root)
2780 break;
2781 }
2782 err = vfs_getattr(&path, stat, STATX_BASIC_STATS, AT_STATX_SYNC_AS_STAT);
2783 path_put(&path);
2784 return err;
2785}
2786
2787static __be32
2788nfsd4_encode_bitmap(struct xdr_stream *xdr, u32 bmval0, u32 bmval1, u32 bmval2)
2789{
2790 __be32 *p;
2791
2792 if (bmval2) {
2793 p = xdr_reserve_space(xdr, 16);
2794 if (!p)
2795 goto out_resource;
2796 *p++ = cpu_to_be32(3);
2797 *p++ = cpu_to_be32(bmval0);
2798 *p++ = cpu_to_be32(bmval1);
2799 *p++ = cpu_to_be32(bmval2);
2800 } else if (bmval1) {
2801 p = xdr_reserve_space(xdr, 12);
2802 if (!p)
2803 goto out_resource;
2804 *p++ = cpu_to_be32(2);
2805 *p++ = cpu_to_be32(bmval0);
2806 *p++ = cpu_to_be32(bmval1);
2807 } else {
2808 p = xdr_reserve_space(xdr, 8);
2809 if (!p)
2810 goto out_resource;
2811 *p++ = cpu_to_be32(1);
2812 *p++ = cpu_to_be32(bmval0);
2813 }
2814
2815 return 0;
2816out_resource:
2817 return nfserr_resource;
2818}
2819
2820
2821
2822
2823
2824static __be32
2825nfsd4_encode_fattr(struct xdr_stream *xdr, struct svc_fh *fhp,
2826 struct svc_export *exp,
2827 struct dentry *dentry, u32 *bmval,
2828 struct svc_rqst *rqstp, int ignore_crossmnt)
2829{
2830 u32 bmval0 = bmval[0];
2831 u32 bmval1 = bmval[1];
2832 u32 bmval2 = bmval[2];
2833 struct kstat stat;
2834 struct svc_fh *tempfh = NULL;
2835 struct kstatfs statfs;
2836 __be32 *p;
2837 int starting_len = xdr->buf->len;
2838 int attrlen_offset;
2839 __be32 attrlen;
2840 u32 dummy;
2841 u64 dummy64;
2842 u32 rdattr_err = 0;
2843 __be32 status;
2844 int err;
2845 struct nfs4_acl *acl = NULL;
2846#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
2847 void *context = NULL;
2848 int contextlen;
2849#endif
2850 bool contextsupport = false;
2851 struct nfsd4_compoundres *resp = rqstp->rq_resp;
2852 u32 minorversion = resp->cstate.minorversion;
2853 struct path path = {
2854 .mnt = exp->ex_path.mnt,
2855 .dentry = dentry,
2856 };
2857 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
2858
2859 BUG_ON(bmval1 & NFSD_WRITEONLY_ATTRS_WORD1);
2860 BUG_ON(!nfsd_attrs_supported(minorversion, bmval));
2861
2862 if (exp->ex_fslocs.migrated) {
2863 status = fattr_handle_absent_fs(&bmval0, &bmval1, &bmval2, &rdattr_err);
2864 if (status)
2865 goto out;
2866 }
2867
2868 err = vfs_getattr(&path, &stat, STATX_BASIC_STATS, AT_STATX_SYNC_AS_STAT);
2869 if (err)
2870 goto out_nfserr;
2871 if ((bmval0 & (FATTR4_WORD0_FILES_AVAIL | FATTR4_WORD0_FILES_FREE |
2872 FATTR4_WORD0_FILES_TOTAL | FATTR4_WORD0_MAXNAME)) ||
2873 (bmval1 & (FATTR4_WORD1_SPACE_AVAIL | FATTR4_WORD1_SPACE_FREE |
2874 FATTR4_WORD1_SPACE_TOTAL))) {
2875 err = vfs_statfs(&path, &statfs);
2876 if (err)
2877 goto out_nfserr;
2878 }
2879 if ((bmval0 & (FATTR4_WORD0_FILEHANDLE | FATTR4_WORD0_FSID)) && !fhp) {
2880 tempfh = kmalloc(sizeof(struct svc_fh), GFP_KERNEL);
2881 status = nfserr_jukebox;
2882 if (!tempfh)
2883 goto out;
2884 fh_init(tempfh, NFS4_FHSIZE);
2885 status = fh_compose(tempfh, exp, dentry, NULL);
2886 if (status)
2887 goto out;
2888 fhp = tempfh;
2889 }
2890 if (bmval0 & FATTR4_WORD0_ACL) {
2891 err = nfsd4_get_nfs4_acl(rqstp, dentry, &acl);
2892 if (err == -EOPNOTSUPP)
2893 bmval0 &= ~FATTR4_WORD0_ACL;
2894 else if (err == -EINVAL) {
2895 status = nfserr_attrnotsupp;
2896 goto out;
2897 } else if (err != 0)
2898 goto out_nfserr;
2899 }
2900
2901#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
2902 if ((bmval2 & FATTR4_WORD2_SECURITY_LABEL) ||
2903 bmval0 & FATTR4_WORD0_SUPPORTED_ATTRS) {
2904 if (exp->ex_flags & NFSEXP_SECURITY_LABEL)
2905 err = security_inode_getsecctx(d_inode(dentry),
2906 &context, &contextlen);
2907 else
2908 err = -EOPNOTSUPP;
2909 contextsupport = (err == 0);
2910 if (bmval2 & FATTR4_WORD2_SECURITY_LABEL) {
2911 if (err == -EOPNOTSUPP)
2912 bmval2 &= ~FATTR4_WORD2_SECURITY_LABEL;
2913 else if (err)
2914 goto out_nfserr;
2915 }
2916 }
2917#endif
2918
2919 status = nfsd4_encode_bitmap(xdr, bmval0, bmval1, bmval2);
2920 if (status)
2921 goto out;
2922
2923 attrlen_offset = xdr->buf->len;
2924 p = xdr_reserve_space(xdr, 4);
2925 if (!p)
2926 goto out_resource;
2927 p++;
2928
2929 if (bmval0 & FATTR4_WORD0_SUPPORTED_ATTRS) {
2930 u32 supp[3];
2931
2932 memcpy(supp, nfsd_suppattrs[minorversion], sizeof(supp));
2933
2934 if (!IS_POSIXACL(dentry->d_inode))
2935 supp[0] &= ~FATTR4_WORD0_ACL;
2936 if (!contextsupport)
2937 supp[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
2938 if (!supp[2]) {
2939 p = xdr_reserve_space(xdr, 12);
2940 if (!p)
2941 goto out_resource;
2942 *p++ = cpu_to_be32(2);
2943 *p++ = cpu_to_be32(supp[0]);
2944 *p++ = cpu_to_be32(supp[1]);
2945 } else {
2946 p = xdr_reserve_space(xdr, 16);
2947 if (!p)
2948 goto out_resource;
2949 *p++ = cpu_to_be32(3);
2950 *p++ = cpu_to_be32(supp[0]);
2951 *p++ = cpu_to_be32(supp[1]);
2952 *p++ = cpu_to_be32(supp[2]);
2953 }
2954 }
2955 if (bmval0 & FATTR4_WORD0_TYPE) {
2956 p = xdr_reserve_space(xdr, 4);
2957 if (!p)
2958 goto out_resource;
2959 dummy = nfs4_file_type(stat.mode);
2960 if (dummy == NF4BAD) {
2961 status = nfserr_serverfault;
2962 goto out;
2963 }
2964 *p++ = cpu_to_be32(dummy);
2965 }
2966 if (bmval0 & FATTR4_WORD0_FH_EXPIRE_TYPE) {
2967 p = xdr_reserve_space(xdr, 4);
2968 if (!p)
2969 goto out_resource;
2970 if (exp->ex_flags & NFSEXP_NOSUBTREECHECK)
2971 *p++ = cpu_to_be32(NFS4_FH_PERSISTENT);
2972 else
2973 *p++ = cpu_to_be32(NFS4_FH_PERSISTENT|
2974 NFS4_FH_VOL_RENAME);
2975 }
2976 if (bmval0 & FATTR4_WORD0_CHANGE) {
2977 p = xdr_reserve_space(xdr, 8);
2978 if (!p)
2979 goto out_resource;
2980 p = encode_change(p, &stat, d_inode(dentry), exp);
2981 }
2982 if (bmval0 & FATTR4_WORD0_SIZE) {
2983 p = xdr_reserve_space(xdr, 8);
2984 if (!p)
2985 goto out_resource;
2986 p = xdr_encode_hyper(p, stat.size);
2987 }
2988 if (bmval0 & FATTR4_WORD0_LINK_SUPPORT) {
2989 p = xdr_reserve_space(xdr, 4);
2990 if (!p)
2991 goto out_resource;
2992 *p++ = cpu_to_be32(1);
2993 }
2994 if (bmval0 & FATTR4_WORD0_SYMLINK_SUPPORT) {
2995 p = xdr_reserve_space(xdr, 4);
2996 if (!p)
2997 goto out_resource;
2998 *p++ = cpu_to_be32(1);
2999 }
3000 if (bmval0 & FATTR4_WORD0_NAMED_ATTR) {
3001 p = xdr_reserve_space(xdr, 4);
3002 if (!p)
3003 goto out_resource;
3004 *p++ = cpu_to_be32(0);
3005 }
3006 if (bmval0 & FATTR4_WORD0_FSID) {
3007 p = xdr_reserve_space(xdr, 16);
3008 if (!p)
3009 goto out_resource;
3010 if (exp->ex_fslocs.migrated) {
3011 p = xdr_encode_hyper(p, NFS4_REFERRAL_FSID_MAJOR);
3012 p = xdr_encode_hyper(p, NFS4_REFERRAL_FSID_MINOR);
3013 } else switch(fsid_source(fhp)) {
3014 case FSIDSOURCE_FSID:
3015 p = xdr_encode_hyper(p, (u64)exp->ex_fsid);
3016 p = xdr_encode_hyper(p, (u64)0);
3017 break;
3018 case FSIDSOURCE_DEV:
3019 *p++ = cpu_to_be32(0);
3020 *p++ = cpu_to_be32(MAJOR(stat.dev));
3021 *p++ = cpu_to_be32(0);
3022 *p++ = cpu_to_be32(MINOR(stat.dev));
3023 break;
3024 case FSIDSOURCE_UUID:
3025 p = xdr_encode_opaque_fixed(p, exp->ex_uuid,
3026 EX_UUID_LEN);
3027 break;
3028 }
3029 }
3030 if (bmval0 & FATTR4_WORD0_UNIQUE_HANDLES) {
3031 p = xdr_reserve_space(xdr, 4);
3032 if (!p)
3033 goto out_resource;
3034 *p++ = cpu_to_be32(0);
3035 }
3036 if (bmval0 & FATTR4_WORD0_LEASE_TIME) {
3037 p = xdr_reserve_space(xdr, 4);
3038 if (!p)
3039 goto out_resource;
3040 *p++ = cpu_to_be32(nn->nfsd4_lease);
3041 }
3042 if (bmval0 & FATTR4_WORD0_RDATTR_ERROR) {
3043 p = xdr_reserve_space(xdr, 4);
3044 if (!p)
3045 goto out_resource;
3046 *p++ = cpu_to_be32(rdattr_err);
3047 }
3048 if (bmval0 & FATTR4_WORD0_ACL) {
3049 struct nfs4_ace *ace;
3050
3051 if (acl == NULL) {
3052 p = xdr_reserve_space(xdr, 4);
3053 if (!p)
3054 goto out_resource;
3055
3056 *p++ = cpu_to_be32(0);
3057 goto out_acl;
3058 }
3059 p = xdr_reserve_space(xdr, 4);
3060 if (!p)
3061 goto out_resource;
3062 *p++ = cpu_to_be32(acl->naces);
3063
3064 for (ace = acl->aces; ace < acl->aces + acl->naces; ace++) {
3065 p = xdr_reserve_space(xdr, 4*3);
3066 if (!p)
3067 goto out_resource;
3068 *p++ = cpu_to_be32(ace->type);
3069 *p++ = cpu_to_be32(ace->flag);
3070 *p++ = cpu_to_be32(ace->access_mask &
3071 NFS4_ACE_MASK_ALL);
3072 status = nfsd4_encode_aclname(xdr, rqstp, ace);
3073 if (status)
3074 goto out;
3075 }
3076 }
3077out_acl:
3078 if (bmval0 & FATTR4_WORD0_ACLSUPPORT) {
3079 p = xdr_reserve_space(xdr, 4);
3080 if (!p)
3081 goto out_resource;
3082 *p++ = cpu_to_be32(IS_POSIXACL(dentry->d_inode) ?
3083 ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL : 0);
3084 }
3085 if (bmval0 & FATTR4_WORD0_CANSETTIME) {
3086 p = xdr_reserve_space(xdr, 4);
3087 if (!p)
3088 goto out_resource;
3089 *p++ = cpu_to_be32(1);
3090 }
3091 if (bmval0 & FATTR4_WORD0_CASE_INSENSITIVE) {
3092 p = xdr_reserve_space(xdr, 4);
3093 if (!p)
3094 goto out_resource;
3095 *p++ = cpu_to_be32(0);
3096 }
3097 if (bmval0 & FATTR4_WORD0_CASE_PRESERVING) {
3098 p = xdr_reserve_space(xdr, 4);
3099 if (!p)
3100 goto out_resource;
3101 *p++ = cpu_to_be32(1);
3102 }
3103 if (bmval0 & FATTR4_WORD0_CHOWN_RESTRICTED) {
3104 p = xdr_reserve_space(xdr, 4);
3105 if (!p)
3106 goto out_resource;
3107 *p++ = cpu_to_be32(1);
3108 }
3109 if (bmval0 & FATTR4_WORD0_FILEHANDLE) {
3110 p = xdr_reserve_space(xdr, fhp->fh_handle.fh_size + 4);
3111 if (!p)
3112 goto out_resource;
3113 p = xdr_encode_opaque(p, &fhp->fh_handle.fh_base,
3114 fhp->fh_handle.fh_size);
3115 }
3116 if (bmval0 & FATTR4_WORD0_FILEID) {
3117 p = xdr_reserve_space(xdr, 8);
3118 if (!p)
3119 goto out_resource;
3120 p = xdr_encode_hyper(p, stat.ino);
3121 }
3122 if (bmval0 & FATTR4_WORD0_FILES_AVAIL) {
3123 p = xdr_reserve_space(xdr, 8);
3124 if (!p)
3125 goto out_resource;
3126 p = xdr_encode_hyper(p, (u64) statfs.f_ffree);
3127 }
3128 if (bmval0 & FATTR4_WORD0_FILES_FREE) {
3129 p = xdr_reserve_space(xdr, 8);
3130 if (!p)
3131 goto out_resource;
3132 p = xdr_encode_hyper(p, (u64) statfs.f_ffree);
3133 }
3134 if (bmval0 & FATTR4_WORD0_FILES_TOTAL) {
3135 p = xdr_reserve_space(xdr, 8);
3136 if (!p)
3137 goto out_resource;
3138 p = xdr_encode_hyper(p, (u64) statfs.f_files);
3139 }
3140 if (bmval0 & FATTR4_WORD0_FS_LOCATIONS) {
3141 status = nfsd4_encode_fs_locations(xdr, rqstp, exp);
3142 if (status)
3143 goto out;
3144 }
3145 if (bmval0 & FATTR4_WORD0_HOMOGENEOUS) {
3146 p = xdr_reserve_space(xdr, 4);
3147 if (!p)
3148 goto out_resource;
3149 *p++ = cpu_to_be32(1);
3150 }
3151 if (bmval0 & FATTR4_WORD0_MAXFILESIZE) {
3152 p = xdr_reserve_space(xdr, 8);
3153 if (!p)
3154 goto out_resource;
3155 p = xdr_encode_hyper(p, exp->ex_path.mnt->mnt_sb->s_maxbytes);
3156 }
3157 if (bmval0 & FATTR4_WORD0_MAXLINK) {
3158 p = xdr_reserve_space(xdr, 4);
3159 if (!p)
3160 goto out_resource;
3161 *p++ = cpu_to_be32(255);
3162 }
3163 if (bmval0 & FATTR4_WORD0_MAXNAME) {
3164 p = xdr_reserve_space(xdr, 4);
3165 if (!p)
3166 goto out_resource;
3167 *p++ = cpu_to_be32(statfs.f_namelen);
3168 }
3169 if (bmval0 & FATTR4_WORD0_MAXREAD) {
3170 p = xdr_reserve_space(xdr, 8);
3171 if (!p)
3172 goto out_resource;
3173 p = xdr_encode_hyper(p, (u64) svc_max_payload(rqstp));
3174 }
3175 if (bmval0 & FATTR4_WORD0_MAXWRITE) {
3176 p = xdr_reserve_space(xdr, 8);
3177 if (!p)
3178 goto out_resource;
3179 p = xdr_encode_hyper(p, (u64) svc_max_payload(rqstp));
3180 }
3181 if (bmval1 & FATTR4_WORD1_MODE) {
3182 p = xdr_reserve_space(xdr, 4);
3183 if (!p)
3184 goto out_resource;
3185 *p++ = cpu_to_be32(stat.mode & S_IALLUGO);
3186 }
3187 if (bmval1 & FATTR4_WORD1_NO_TRUNC) {
3188 p = xdr_reserve_space(xdr, 4);
3189 if (!p)
3190 goto out_resource;
3191 *p++ = cpu_to_be32(1);
3192 }
3193 if (bmval1 & FATTR4_WORD1_NUMLINKS) {
3194 p = xdr_reserve_space(xdr, 4);
3195 if (!p)
3196 goto out_resource;
3197 *p++ = cpu_to_be32(stat.nlink);
3198 }
3199 if (bmval1 & FATTR4_WORD1_OWNER) {
3200 status = nfsd4_encode_user(xdr, rqstp, stat.uid);
3201 if (status)
3202 goto out;
3203 }
3204 if (bmval1 & FATTR4_WORD1_OWNER_GROUP) {
3205 status = nfsd4_encode_group(xdr, rqstp, stat.gid);
3206 if (status)
3207 goto out;
3208 }
3209 if (bmval1 & FATTR4_WORD1_RAWDEV) {
3210 p = xdr_reserve_space(xdr, 8);
3211 if (!p)
3212 goto out_resource;
3213 *p++ = cpu_to_be32((u32) MAJOR(stat.rdev));
3214 *p++ = cpu_to_be32((u32) MINOR(stat.rdev));
3215 }
3216 if (bmval1 & FATTR4_WORD1_SPACE_AVAIL) {
3217 p = xdr_reserve_space(xdr, 8);
3218 if (!p)
3219 goto out_resource;
3220 dummy64 = (u64)statfs.f_bavail * (u64)statfs.f_bsize;
3221 p = xdr_encode_hyper(p, dummy64);
3222 }
3223 if (bmval1 & FATTR4_WORD1_SPACE_FREE) {
3224 p = xdr_reserve_space(xdr, 8);
3225 if (!p)
3226 goto out_resource;
3227 dummy64 = (u64)statfs.f_bfree * (u64)statfs.f_bsize;
3228 p = xdr_encode_hyper(p, dummy64);
3229 }
3230 if (bmval1 & FATTR4_WORD1_SPACE_TOTAL) {
3231 p = xdr_reserve_space(xdr, 8);
3232 if (!p)
3233 goto out_resource;
3234 dummy64 = (u64)statfs.f_blocks * (u64)statfs.f_bsize;
3235 p = xdr_encode_hyper(p, dummy64);
3236 }
3237 if (bmval1 & FATTR4_WORD1_SPACE_USED) {
3238 p = xdr_reserve_space(xdr, 8);
3239 if (!p)
3240 goto out_resource;
3241 dummy64 = (u64)stat.blocks << 9;
3242 p = xdr_encode_hyper(p, dummy64);
3243 }
3244 if (bmval1 & FATTR4_WORD1_TIME_ACCESS) {
3245 p = xdr_reserve_space(xdr, 12);
3246 if (!p)
3247 goto out_resource;
3248 p = xdr_encode_hyper(p, (s64)stat.atime.tv_sec);
3249 *p++ = cpu_to_be32(stat.atime.tv_nsec);
3250 }
3251 if (bmval1 & FATTR4_WORD1_TIME_DELTA) {
3252 p = xdr_reserve_space(xdr, 12);
3253 if (!p)
3254 goto out_resource;
3255 p = encode_time_delta(p, d_inode(dentry));
3256 }
3257 if (bmval1 & FATTR4_WORD1_TIME_METADATA) {
3258 p = xdr_reserve_space(xdr, 12);
3259 if (!p)
3260 goto out_resource;
3261 p = xdr_encode_hyper(p, (s64)stat.ctime.tv_sec);
3262 *p++ = cpu_to_be32(stat.ctime.tv_nsec);
3263 }
3264 if (bmval1 & FATTR4_WORD1_TIME_MODIFY) {
3265 p = xdr_reserve_space(xdr, 12);
3266 if (!p)
3267 goto out_resource;
3268 p = xdr_encode_hyper(p, (s64)stat.mtime.tv_sec);
3269 *p++ = cpu_to_be32(stat.mtime.tv_nsec);
3270 }
3271 if (bmval1 & FATTR4_WORD1_MOUNTED_ON_FILEID) {
3272 struct kstat parent_stat;
3273 u64 ino = stat.ino;
3274
3275 p = xdr_reserve_space(xdr, 8);
3276 if (!p)
3277 goto out_resource;
3278
3279
3280
3281
3282 if (ignore_crossmnt == 0 &&
3283 dentry == exp->ex_path.mnt->mnt_root) {
3284 err = get_parent_attributes(exp, &parent_stat);
3285 if (err)
3286 goto out_nfserr;
3287 ino = parent_stat.ino;
3288 }
3289 p = xdr_encode_hyper(p, ino);
3290 }
3291#ifdef CONFIG_NFSD_PNFS
3292 if (bmval1 & FATTR4_WORD1_FS_LAYOUT_TYPES) {
3293 status = nfsd4_encode_layout_types(xdr, exp->ex_layout_types);
3294 if (status)
3295 goto out;
3296 }
3297
3298 if (bmval2 & FATTR4_WORD2_LAYOUT_TYPES) {
3299 status = nfsd4_encode_layout_types(xdr, exp->ex_layout_types);
3300 if (status)
3301 goto out;
3302 }
3303
3304 if (bmval2 & FATTR4_WORD2_LAYOUT_BLKSIZE) {
3305 p = xdr_reserve_space(xdr, 4);
3306 if (!p)
3307 goto out_resource;
3308 *p++ = cpu_to_be32(stat.blksize);
3309 }
3310#endif
3311 if (bmval2 & FATTR4_WORD2_SUPPATTR_EXCLCREAT) {
3312 u32 supp[3];
3313
3314 memcpy(supp, nfsd_suppattrs[minorversion], sizeof(supp));
3315 supp[0] &= NFSD_SUPPATTR_EXCLCREAT_WORD0;
3316 supp[1] &= NFSD_SUPPATTR_EXCLCREAT_WORD1;
3317 supp[2] &= NFSD_SUPPATTR_EXCLCREAT_WORD2;
3318
3319 status = nfsd4_encode_bitmap(xdr, supp[0], supp[1], supp[2]);
3320 if (status)
3321 goto out;
3322 }
3323
3324#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
3325 if (bmval2 & FATTR4_WORD2_SECURITY_LABEL) {
3326 status = nfsd4_encode_security_label(xdr, rqstp, context,
3327 contextlen);
3328 if (status)
3329 goto out;
3330 }
3331#endif
3332
3333 if (bmval2 & FATTR4_WORD2_XATTR_SUPPORT) {
3334 p = xdr_reserve_space(xdr, 4);
3335 if (!p)
3336 goto out_resource;
3337 err = xattr_supported_namespace(d_inode(dentry),
3338 XATTR_USER_PREFIX);
3339 *p++ = cpu_to_be32(err == 0);
3340 }
3341
3342 attrlen = htonl(xdr->buf->len - attrlen_offset - 4);
3343 write_bytes_to_xdr_buf(xdr->buf, attrlen_offset, &attrlen, 4);
3344 status = nfs_ok;
3345
3346out:
3347#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
3348 if (context)
3349 security_release_secctx(context, contextlen);
3350#endif
3351 kfree(acl);
3352 if (tempfh) {
3353 fh_put(tempfh);
3354 kfree(tempfh);
3355 }
3356 if (status)
3357 xdr_truncate_encode(xdr, starting_len);
3358 return status;
3359out_nfserr:
3360 status = nfserrno(err);
3361 goto out;
3362out_resource:
3363 status = nfserr_resource;
3364 goto out;
3365}
3366
3367static void svcxdr_init_encode_from_buffer(struct xdr_stream *xdr,
3368 struct xdr_buf *buf, __be32 *p, int bytes)
3369{
3370 xdr->scratch.iov_len = 0;
3371 memset(buf, 0, sizeof(struct xdr_buf));
3372 buf->head[0].iov_base = p;
3373 buf->head[0].iov_len = 0;
3374 buf->len = 0;
3375 xdr->buf = buf;
3376 xdr->iov = buf->head;
3377 xdr->p = p;
3378 xdr->end = (void *)p + bytes;
3379 buf->buflen = bytes;
3380}
3381
3382__be32 nfsd4_encode_fattr_to_buf(__be32 **p, int words,
3383 struct svc_fh *fhp, struct svc_export *exp,
3384 struct dentry *dentry, u32 *bmval,
3385 struct svc_rqst *rqstp, int ignore_crossmnt)
3386{
3387 struct xdr_buf dummy;
3388 struct xdr_stream xdr;
3389 __be32 ret;
3390
3391 svcxdr_init_encode_from_buffer(&xdr, &dummy, *p, words << 2);
3392 ret = nfsd4_encode_fattr(&xdr, fhp, exp, dentry, bmval, rqstp,
3393 ignore_crossmnt);
3394 *p = xdr.p;
3395 return ret;
3396}
3397
3398static inline int attributes_need_mount(u32 *bmval)
3399{
3400 if (bmval[0] & ~(FATTR4_WORD0_RDATTR_ERROR | FATTR4_WORD0_LEASE_TIME))
3401 return 1;
3402 if (bmval[1] & ~FATTR4_WORD1_MOUNTED_ON_FILEID)
3403 return 1;
3404 return 0;
3405}
3406
3407static __be32
3408nfsd4_encode_dirent_fattr(struct xdr_stream *xdr, struct nfsd4_readdir *cd,
3409 const char *name, int namlen)
3410{
3411 struct svc_export *exp = cd->rd_fhp->fh_export;
3412 struct dentry *dentry;
3413 __be32 nfserr;
3414 int ignore_crossmnt = 0;
3415
3416 dentry = lookup_positive_unlocked(name, cd->rd_fhp->fh_dentry, namlen);
3417 if (IS_ERR(dentry))
3418 return nfserrno(PTR_ERR(dentry));
3419
3420 exp_get(exp);
3421
3422
3423
3424
3425
3426
3427
3428 if (nfsd_mountpoint(dentry, exp)) {
3429 int err;
3430
3431 if (!(exp->ex_flags & NFSEXP_V4ROOT)
3432 && !attributes_need_mount(cd->rd_bmval)) {
3433 ignore_crossmnt = 1;
3434 goto out_encode;
3435 }
3436
3437
3438
3439
3440
3441 err = nfsd_cross_mnt(cd->rd_rqstp, &dentry, &exp);
3442 if (err) {
3443 nfserr = nfserrno(err);
3444 goto out_put;
3445 }
3446 nfserr = check_nfsd_access(exp, cd->rd_rqstp);
3447 if (nfserr)
3448 goto out_put;
3449
3450 }
3451out_encode:
3452 nfserr = nfsd4_encode_fattr(xdr, NULL, exp, dentry, cd->rd_bmval,
3453 cd->rd_rqstp, ignore_crossmnt);
3454out_put:
3455 dput(dentry);
3456 exp_put(exp);
3457 return nfserr;
3458}
3459
3460static __be32 *
3461nfsd4_encode_rdattr_error(struct xdr_stream *xdr, __be32 nfserr)
3462{
3463 __be32 *p;
3464
3465 p = xdr_reserve_space(xdr, 20);
3466 if (!p)
3467 return NULL;
3468 *p++ = htonl(2);
3469 *p++ = htonl(FATTR4_WORD0_RDATTR_ERROR);
3470 *p++ = htonl(0);
3471
3472 *p++ = htonl(4);
3473 *p++ = nfserr;
3474 return p;
3475}
3476
3477static int
3478nfsd4_encode_dirent(void *ccdv, const char *name, int namlen,
3479 loff_t offset, u64 ino, unsigned int d_type)
3480{
3481 struct readdir_cd *ccd = ccdv;
3482 struct nfsd4_readdir *cd = container_of(ccd, struct nfsd4_readdir, common);
3483 struct xdr_stream *xdr = cd->xdr;
3484 int start_offset = xdr->buf->len;
3485 int cookie_offset;
3486 u32 name_and_cookie;
3487 int entry_bytes;
3488 __be32 nfserr = nfserr_toosmall;
3489 __be64 wire_offset;
3490 __be32 *p;
3491
3492
3493 if (name && isdotent(name, namlen)) {
3494 cd->common.err = nfs_ok;
3495 return 0;
3496 }
3497
3498 if (cd->cookie_offset) {
3499 wire_offset = cpu_to_be64(offset);
3500 write_bytes_to_xdr_buf(xdr->buf, cd->cookie_offset,
3501 &wire_offset, 8);
3502 }
3503
3504 p = xdr_reserve_space(xdr, 4);
3505 if (!p)
3506 goto fail;
3507 *p++ = xdr_one;
3508 cookie_offset = xdr->buf->len;
3509 p = xdr_reserve_space(xdr, 3*4 + namlen);
3510 if (!p)
3511 goto fail;
3512 p = xdr_encode_hyper(p, NFS_OFFSET_MAX);
3513 p = xdr_encode_array(p, name, namlen);
3514
3515 nfserr = nfsd4_encode_dirent_fattr(xdr, cd, name, namlen);
3516 switch (nfserr) {
3517 case nfs_ok:
3518 break;
3519 case nfserr_resource:
3520 nfserr = nfserr_toosmall;
3521 goto fail;
3522 case nfserr_noent:
3523 xdr_truncate_encode(xdr, start_offset);
3524 goto skip_entry;
3525 default:
3526
3527
3528
3529
3530
3531
3532
3533 if (!(cd->rd_bmval[0] & FATTR4_WORD0_RDATTR_ERROR))
3534 goto fail;
3535 p = nfsd4_encode_rdattr_error(xdr, nfserr);
3536 if (p == NULL) {
3537 nfserr = nfserr_toosmall;
3538 goto fail;
3539 }
3540 }
3541 nfserr = nfserr_toosmall;
3542 entry_bytes = xdr->buf->len - start_offset;
3543 if (entry_bytes > cd->rd_maxcount)
3544 goto fail;
3545 cd->rd_maxcount -= entry_bytes;
3546
3547
3548
3549
3550
3551 if (cd->rd_dircount) {
3552 name_and_cookie = 4 + 4 * XDR_QUADLEN(namlen) + 8;
3553 if (name_and_cookie > cd->rd_dircount && cd->cookie_offset)
3554 goto fail;
3555 cd->rd_dircount -= min(cd->rd_dircount, name_and_cookie);
3556 if (!cd->rd_dircount)
3557 cd->rd_maxcount = 0;
3558 }
3559
3560 cd->cookie_offset = cookie_offset;
3561skip_entry:
3562 cd->common.err = nfs_ok;
3563 return 0;
3564fail:
3565 xdr_truncate_encode(xdr, start_offset);
3566 cd->common.err = nfserr;
3567 return -EINVAL;
3568}
3569
3570static __be32
3571nfsd4_encode_stateid(struct xdr_stream *xdr, stateid_t *sid)
3572{
3573 __be32 *p;
3574
3575 p = xdr_reserve_space(xdr, sizeof(stateid_t));
3576 if (!p)
3577 return nfserr_resource;
3578 *p++ = cpu_to_be32(sid->si_generation);
3579 p = xdr_encode_opaque_fixed(p, &sid->si_opaque,
3580 sizeof(stateid_opaque_t));
3581 return 0;
3582}
3583
3584static __be32
3585nfsd4_encode_access(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_access *access)
3586{
3587 struct xdr_stream *xdr = resp->xdr;
3588 __be32 *p;
3589
3590 p = xdr_reserve_space(xdr, 8);
3591 if (!p)
3592 return nfserr_resource;
3593 *p++ = cpu_to_be32(access->ac_supported);
3594 *p++ = cpu_to_be32(access->ac_resp_access);
3595 return 0;
3596}
3597
3598static __be32 nfsd4_encode_bind_conn_to_session(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_bind_conn_to_session *bcts)
3599{
3600 struct xdr_stream *xdr = resp->xdr;
3601 __be32 *p;
3602
3603 p = xdr_reserve_space(xdr, NFS4_MAX_SESSIONID_LEN + 8);
3604 if (!p)
3605 return nfserr_resource;
3606 p = xdr_encode_opaque_fixed(p, bcts->sessionid.data,
3607 NFS4_MAX_SESSIONID_LEN);
3608 *p++ = cpu_to_be32(bcts->dir);
3609
3610 *p++ = cpu_to_be32(0);
3611 return 0;
3612}
3613
3614static __be32
3615nfsd4_encode_close(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_close *close)
3616{
3617 struct xdr_stream *xdr = resp->xdr;
3618
3619 return nfsd4_encode_stateid(xdr, &close->cl_stateid);
3620}
3621
3622
3623static __be32
3624nfsd4_encode_commit(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_commit *commit)
3625{
3626 struct xdr_stream *xdr = resp->xdr;
3627 __be32 *p;
3628
3629 p = xdr_reserve_space(xdr, NFS4_VERIFIER_SIZE);
3630 if (!p)
3631 return nfserr_resource;
3632 p = xdr_encode_opaque_fixed(p, commit->co_verf.data,
3633 NFS4_VERIFIER_SIZE);
3634 return 0;
3635}
3636
3637static __be32
3638nfsd4_encode_create(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_create *create)
3639{
3640 struct xdr_stream *xdr = resp->xdr;
3641 __be32 *p;
3642
3643 p = xdr_reserve_space(xdr, 20);
3644 if (!p)
3645 return nfserr_resource;
3646 encode_cinfo(p, &create->cr_cinfo);
3647 return nfsd4_encode_bitmap(xdr, create->cr_bmval[0],
3648 create->cr_bmval[1], create->cr_bmval[2]);
3649}
3650
3651static __be32
3652nfsd4_encode_getattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_getattr *getattr)
3653{
3654 struct svc_fh *fhp = getattr->ga_fhp;
3655 struct xdr_stream *xdr = resp->xdr;
3656
3657 return nfsd4_encode_fattr(xdr, fhp, fhp->fh_export, fhp->fh_dentry,
3658 getattr->ga_bmval, resp->rqstp, 0);
3659}
3660
3661static __be32
3662nfsd4_encode_getfh(struct nfsd4_compoundres *resp, __be32 nfserr, struct svc_fh **fhpp)
3663{
3664 struct xdr_stream *xdr = resp->xdr;
3665 struct svc_fh *fhp = *fhpp;
3666 unsigned int len;
3667 __be32 *p;
3668
3669 len = fhp->fh_handle.fh_size;
3670 p = xdr_reserve_space(xdr, len + 4);
3671 if (!p)
3672 return nfserr_resource;
3673 p = xdr_encode_opaque(p, &fhp->fh_handle.fh_base, len);
3674 return 0;
3675}
3676
3677
3678
3679
3680
3681static __be32
3682nfsd4_encode_lock_denied(struct xdr_stream *xdr, struct nfsd4_lock_denied *ld)
3683{
3684 struct xdr_netobj *conf = &ld->ld_owner;
3685 __be32 *p;
3686
3687again:
3688 p = xdr_reserve_space(xdr, 32 + XDR_LEN(conf->len));
3689 if (!p) {
3690
3691
3692
3693
3694 if (conf->len) {
3695 kfree(conf->data);
3696 conf->len = 0;
3697 conf->data = NULL;
3698 goto again;
3699 }
3700 return nfserr_resource;
3701 }
3702 p = xdr_encode_hyper(p, ld->ld_start);
3703 p = xdr_encode_hyper(p, ld->ld_length);
3704 *p++ = cpu_to_be32(ld->ld_type);
3705 if (conf->len) {
3706 p = xdr_encode_opaque_fixed(p, &ld->ld_clientid, 8);
3707 p = xdr_encode_opaque(p, conf->data, conf->len);
3708 kfree(conf->data);
3709 } else {
3710 p = xdr_encode_hyper(p, (u64)0);
3711 *p++ = cpu_to_be32(0);
3712 }
3713 return nfserr_denied;
3714}
3715
3716static __be32
3717nfsd4_encode_lock(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lock *lock)
3718{
3719 struct xdr_stream *xdr = resp->xdr;
3720
3721 if (!nfserr)
3722 nfserr = nfsd4_encode_stateid(xdr, &lock->lk_resp_stateid);
3723 else if (nfserr == nfserr_denied)
3724 nfserr = nfsd4_encode_lock_denied(xdr, &lock->lk_denied);
3725
3726 return nfserr;
3727}
3728
3729static __be32
3730nfsd4_encode_lockt(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lockt *lockt)
3731{
3732 struct xdr_stream *xdr = resp->xdr;
3733
3734 if (nfserr == nfserr_denied)
3735 nfsd4_encode_lock_denied(xdr, &lockt->lt_denied);
3736 return nfserr;
3737}
3738
3739static __be32
3740nfsd4_encode_locku(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_locku *locku)
3741{
3742 struct xdr_stream *xdr = resp->xdr;
3743
3744 return nfsd4_encode_stateid(xdr, &locku->lu_stateid);
3745}
3746
3747
3748static __be32
3749nfsd4_encode_link(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_link *link)
3750{
3751 struct xdr_stream *xdr = resp->xdr;
3752 __be32 *p;
3753
3754 p = xdr_reserve_space(xdr, 20);
3755 if (!p)
3756 return nfserr_resource;
3757 p = encode_cinfo(p, &link->li_cinfo);
3758 return 0;
3759}
3760
3761
3762static __be32
3763nfsd4_encode_open(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open *open)
3764{
3765 struct xdr_stream *xdr = resp->xdr;
3766 __be32 *p;
3767
3768 nfserr = nfsd4_encode_stateid(xdr, &open->op_stateid);
3769 if (nfserr)
3770 return nfserr;
3771 p = xdr_reserve_space(xdr, 24);
3772 if (!p)
3773 return nfserr_resource;
3774 p = encode_cinfo(p, &open->op_cinfo);
3775 *p++ = cpu_to_be32(open->op_rflags);
3776
3777 nfserr = nfsd4_encode_bitmap(xdr, open->op_bmval[0], open->op_bmval[1],
3778 open->op_bmval[2]);
3779 if (nfserr)
3780 return nfserr;
3781
3782 p = xdr_reserve_space(xdr, 4);
3783 if (!p)
3784 return nfserr_resource;
3785
3786 *p++ = cpu_to_be32(open->op_delegate_type);
3787 switch (open->op_delegate_type) {
3788 case NFS4_OPEN_DELEGATE_NONE:
3789 break;
3790 case NFS4_OPEN_DELEGATE_READ:
3791 nfserr = nfsd4_encode_stateid(xdr, &open->op_delegate_stateid);
3792 if (nfserr)
3793 return nfserr;
3794 p = xdr_reserve_space(xdr, 20);
3795 if (!p)
3796 return nfserr_resource;
3797 *p++ = cpu_to_be32(open->op_recall);
3798
3799
3800
3801
3802 *p++ = cpu_to_be32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
3803 *p++ = cpu_to_be32(0);
3804 *p++ = cpu_to_be32(0);
3805 *p++ = cpu_to_be32(0);
3806 break;
3807 case NFS4_OPEN_DELEGATE_WRITE:
3808 nfserr = nfsd4_encode_stateid(xdr, &open->op_delegate_stateid);
3809 if (nfserr)
3810 return nfserr;
3811 p = xdr_reserve_space(xdr, 32);
3812 if (!p)
3813 return nfserr_resource;
3814 *p++ = cpu_to_be32(0);
3815
3816
3817
3818
3819 *p++ = cpu_to_be32(NFS4_LIMIT_SIZE);
3820 *p++ = cpu_to_be32(~(u32)0);
3821 *p++ = cpu_to_be32(~(u32)0);
3822
3823
3824
3825
3826 *p++ = cpu_to_be32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
3827 *p++ = cpu_to_be32(0);
3828 *p++ = cpu_to_be32(0);
3829 *p++ = cpu_to_be32(0);
3830 break;
3831 case NFS4_OPEN_DELEGATE_NONE_EXT:
3832 switch (open->op_why_no_deleg) {
3833 case WND4_CONTENTION:
3834 case WND4_RESOURCE:
3835 p = xdr_reserve_space(xdr, 8);
3836 if (!p)
3837 return nfserr_resource;
3838 *p++ = cpu_to_be32(open->op_why_no_deleg);
3839
3840 *p++ = cpu_to_be32(0);
3841 break;
3842 default:
3843 p = xdr_reserve_space(xdr, 4);
3844 if (!p)
3845 return nfserr_resource;
3846 *p++ = cpu_to_be32(open->op_why_no_deleg);
3847 }
3848 break;
3849 default:
3850 BUG();
3851 }
3852
3853 return 0;
3854}
3855
3856static __be32
3857nfsd4_encode_open_confirm(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_confirm *oc)
3858{
3859 struct xdr_stream *xdr = resp->xdr;
3860
3861 return nfsd4_encode_stateid(xdr, &oc->oc_resp_stateid);
3862}
3863
3864static __be32
3865nfsd4_encode_open_downgrade(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_downgrade *od)
3866{
3867 struct xdr_stream *xdr = resp->xdr;
3868
3869 return nfsd4_encode_stateid(xdr, &od->od_stateid);
3870}
3871
3872static __be32 nfsd4_encode_splice_read(
3873 struct nfsd4_compoundres *resp,
3874 struct nfsd4_read *read,
3875 struct file *file, unsigned long maxcount)
3876{
3877 struct xdr_stream *xdr = resp->xdr;
3878 struct xdr_buf *buf = xdr->buf;
3879 int status, space_left;
3880 u32 eof;
3881 __be32 nfserr;
3882 __be32 *p = xdr->p - 2;
3883
3884
3885 if (xdr->end - xdr->p < 1)
3886 return nfserr_resource;
3887
3888 nfserr = nfsd_splice_read(read->rd_rqstp, read->rd_fhp,
3889 file, read->rd_offset, &maxcount, &eof);
3890 read->rd_length = maxcount;
3891 if (nfserr)
3892 goto out_err;
3893 status = svc_encode_result_payload(read->rd_rqstp,
3894 buf->head[0].iov_len, maxcount);
3895 if (status) {
3896 nfserr = nfserrno(status);
3897 goto out_err;
3898 }
3899
3900 *(p++) = htonl(eof);
3901 *(p++) = htonl(maxcount);
3902
3903 buf->page_len = maxcount;
3904 buf->len += maxcount;
3905 xdr->page_ptr += (buf->page_base + maxcount + PAGE_SIZE - 1)
3906 / PAGE_SIZE;
3907
3908
3909 buf->tail[0].iov_base = xdr->p;
3910 buf->tail[0].iov_len = 0;
3911 xdr->iov = buf->tail;
3912 if (maxcount&3) {
3913 int pad = 4 - (maxcount&3);
3914
3915 *(xdr->p++) = 0;
3916
3917 buf->tail[0].iov_base += maxcount&3;
3918 buf->tail[0].iov_len = pad;
3919 buf->len += pad;
3920 }
3921
3922 space_left = min_t(int, (void *)xdr->end - (void *)xdr->p,
3923 buf->buflen - buf->len);
3924 buf->buflen = buf->len + space_left;
3925 xdr->end = (__be32 *)((void *)xdr->end + space_left);
3926
3927 return 0;
3928
3929out_err:
3930
3931
3932
3933
3934
3935 buf->page_len = 0;
3936 return nfserr;
3937}
3938
3939static __be32 nfsd4_encode_readv(struct nfsd4_compoundres *resp,
3940 struct nfsd4_read *read,
3941 struct file *file, unsigned long maxcount)
3942{
3943 struct xdr_stream *xdr = resp->xdr;
3944 u32 eof;
3945 int starting_len = xdr->buf->len - 8;
3946 __be32 nfserr;
3947 __be32 tmp;
3948 int pad;
3949
3950 read->rd_vlen = xdr_reserve_space_vec(xdr, resp->rqstp->rq_vec, maxcount);
3951 if (read->rd_vlen < 0)
3952 return nfserr_resource;
3953
3954 nfserr = nfsd_readv(resp->rqstp, read->rd_fhp, file, read->rd_offset,
3955 resp->rqstp->rq_vec, read->rd_vlen, &maxcount,
3956 &eof);
3957 read->rd_length = maxcount;
3958 if (nfserr)
3959 return nfserr;
3960 if (svc_encode_result_payload(resp->rqstp, starting_len + 8, maxcount))
3961 return nfserr_io;
3962 xdr_truncate_encode(xdr, starting_len + 8 + xdr_align_size(maxcount));
3963
3964 tmp = htonl(eof);
3965 write_bytes_to_xdr_buf(xdr->buf, starting_len , &tmp, 4);
3966 tmp = htonl(maxcount);
3967 write_bytes_to_xdr_buf(xdr->buf, starting_len + 4, &tmp, 4);
3968
3969 tmp = xdr_zero;
3970 pad = (maxcount&3) ? 4 - (maxcount&3) : 0;
3971 write_bytes_to_xdr_buf(xdr->buf, starting_len + 8 + maxcount,
3972 &tmp, pad);
3973 return 0;
3974
3975}
3976
3977static __be32
3978nfsd4_encode_read(struct nfsd4_compoundres *resp, __be32 nfserr,
3979 struct nfsd4_read *read)
3980{
3981 unsigned long maxcount;
3982 struct xdr_stream *xdr = resp->xdr;
3983 struct file *file;
3984 int starting_len = xdr->buf->len;
3985 __be32 *p;
3986
3987 if (nfserr)
3988 return nfserr;
3989 file = read->rd_nf->nf_file;
3990
3991 p = xdr_reserve_space(xdr, 8);
3992 if (!p) {
3993 WARN_ON_ONCE(test_bit(RQ_SPLICE_OK, &resp->rqstp->rq_flags));
3994 return nfserr_resource;
3995 }
3996 if (resp->xdr->buf->page_len &&
3997 test_bit(RQ_SPLICE_OK, &resp->rqstp->rq_flags)) {
3998 WARN_ON_ONCE(1);
3999 return nfserr_resource;
4000 }
4001 xdr_commit_encode(xdr);
4002
4003 maxcount = svc_max_payload(resp->rqstp);
4004 maxcount = min_t(unsigned long, maxcount,
4005 (xdr->buf->buflen - xdr->buf->len));
4006 maxcount = min_t(unsigned long, maxcount, read->rd_length);
4007
4008 if (file->f_op->splice_read &&
4009 test_bit(RQ_SPLICE_OK, &resp->rqstp->rq_flags))
4010 nfserr = nfsd4_encode_splice_read(resp, read, file, maxcount);
4011 else
4012 nfserr = nfsd4_encode_readv(resp, read, file, maxcount);
4013
4014 if (nfserr)
4015 xdr_truncate_encode(xdr, starting_len);
4016
4017 return nfserr;
4018}
4019
4020static __be32
4021nfsd4_encode_readlink(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readlink *readlink)
4022{
4023 int maxcount;
4024 __be32 wire_count;
4025 int zero = 0;
4026 struct xdr_stream *xdr = resp->xdr;
4027 int length_offset = xdr->buf->len;
4028 int status;
4029 __be32 *p;
4030
4031 p = xdr_reserve_space(xdr, 4);
4032 if (!p)
4033 return nfserr_resource;
4034 maxcount = PAGE_SIZE;
4035
4036 p = xdr_reserve_space(xdr, maxcount);
4037 if (!p)
4038 return nfserr_resource;
4039
4040
4041
4042
4043
4044
4045 nfserr = nfsd_readlink(readlink->rl_rqstp, readlink->rl_fhp,
4046 (char *)p, &maxcount);
4047 if (nfserr == nfserr_isdir)
4048 nfserr = nfserr_inval;
4049 if (nfserr)
4050 goto out_err;
4051 status = svc_encode_result_payload(readlink->rl_rqstp, length_offset,
4052 maxcount);
4053 if (status) {
4054 nfserr = nfserrno(status);
4055 goto out_err;
4056 }
4057
4058 wire_count = htonl(maxcount);
4059 write_bytes_to_xdr_buf(xdr->buf, length_offset, &wire_count, 4);
4060 xdr_truncate_encode(xdr, length_offset + 4 + ALIGN(maxcount, 4));
4061 if (maxcount & 3)
4062 write_bytes_to_xdr_buf(xdr->buf, length_offset + 4 + maxcount,
4063 &zero, 4 - (maxcount&3));
4064 return 0;
4065
4066out_err:
4067 xdr_truncate_encode(xdr, length_offset);
4068 return nfserr;
4069}
4070
4071static __be32
4072nfsd4_encode_readdir(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readdir *readdir)
4073{
4074 int maxcount;
4075 int bytes_left;
4076 loff_t offset;
4077 __be64 wire_offset;
4078 struct xdr_stream *xdr = resp->xdr;
4079 int starting_len = xdr->buf->len;
4080 __be32 *p;
4081
4082 p = xdr_reserve_space(xdr, NFS4_VERIFIER_SIZE);
4083 if (!p)
4084 return nfserr_resource;
4085
4086
4087 *p++ = cpu_to_be32(0);
4088 *p++ = cpu_to_be32(0);
4089 xdr->buf->head[0].iov_len = (char *)xdr->p -
4090 (char *)xdr->buf->head[0].iov_base;
4091
4092
4093
4094
4095
4096 bytes_left = xdr->buf->buflen - xdr->buf->len
4097 - COMPOUND_ERR_SLACK_SPACE - 8;
4098 if (bytes_left < 0) {
4099 nfserr = nfserr_resource;
4100 goto err_no_verf;
4101 }
4102 maxcount = svc_max_payload(resp->rqstp);
4103 maxcount = min_t(u32, readdir->rd_maxcount, maxcount);
4104
4105
4106
4107
4108
4109 if (maxcount < 16) {
4110 nfserr = nfserr_toosmall;
4111 goto err_no_verf;
4112 }
4113 maxcount = min_t(int, maxcount-16, bytes_left);
4114
4115
4116 if (!readdir->rd_dircount)
4117 readdir->rd_dircount = svc_max_payload(resp->rqstp);
4118
4119 readdir->xdr = xdr;
4120 readdir->rd_maxcount = maxcount;
4121 readdir->common.err = 0;
4122 readdir->cookie_offset = 0;
4123
4124 offset = readdir->rd_cookie;
4125 nfserr = nfsd_readdir(readdir->rd_rqstp, readdir->rd_fhp,
4126 &offset,
4127 &readdir->common, nfsd4_encode_dirent);
4128 if (nfserr == nfs_ok &&
4129 readdir->common.err == nfserr_toosmall &&
4130 xdr->buf->len == starting_len + 8) {
4131
4132 if (maxcount - 16 < bytes_left)
4133
4134 nfserr = nfserr_toosmall;
4135 else
4136
4137 nfserr = nfserr_resource;
4138 }
4139 if (nfserr)
4140 goto err_no_verf;
4141
4142 if (readdir->cookie_offset) {
4143 wire_offset = cpu_to_be64(offset);
4144 write_bytes_to_xdr_buf(xdr->buf, readdir->cookie_offset,
4145 &wire_offset, 8);
4146 }
4147
4148 p = xdr_reserve_space(xdr, 8);
4149 if (!p) {
4150 WARN_ON_ONCE(1);
4151 goto err_no_verf;
4152 }
4153 *p++ = 0;
4154 *p++ = htonl(readdir->common.err == nfserr_eof);
4155
4156 return 0;
4157err_no_verf:
4158 xdr_truncate_encode(xdr, starting_len);
4159 return nfserr;
4160}
4161
4162static __be32
4163nfsd4_encode_remove(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_remove *remove)
4164{
4165 struct xdr_stream *xdr = resp->xdr;
4166 __be32 *p;
4167
4168 p = xdr_reserve_space(xdr, 20);
4169 if (!p)
4170 return nfserr_resource;
4171 p = encode_cinfo(p, &remove->rm_cinfo);
4172 return 0;
4173}
4174
4175static __be32
4176nfsd4_encode_rename(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_rename *rename)
4177{
4178 struct xdr_stream *xdr = resp->xdr;
4179 __be32 *p;
4180
4181 p = xdr_reserve_space(xdr, 40);
4182 if (!p)
4183 return nfserr_resource;
4184 p = encode_cinfo(p, &rename->rn_sinfo);
4185 p = encode_cinfo(p, &rename->rn_tinfo);
4186 return 0;
4187}
4188
4189static __be32
4190nfsd4_do_encode_secinfo(struct xdr_stream *xdr, struct svc_export *exp)
4191{
4192 u32 i, nflavs, supported;
4193 struct exp_flavor_info *flavs;
4194 struct exp_flavor_info def_flavs[2];
4195 __be32 *p, *flavorsp;
4196 static bool report = true;
4197
4198 if (exp->ex_nflavors) {
4199 flavs = exp->ex_flavors;
4200 nflavs = exp->ex_nflavors;
4201 } else {
4202 flavs = def_flavs;
4203 if (exp->ex_client->flavour->flavour == RPC_AUTH_UNIX) {
4204 nflavs = 2;
4205 flavs[0].pseudoflavor = RPC_AUTH_UNIX;
4206 flavs[1].pseudoflavor = RPC_AUTH_NULL;
4207 } else if (exp->ex_client->flavour->flavour == RPC_AUTH_GSS) {
4208 nflavs = 1;
4209 flavs[0].pseudoflavor
4210 = svcauth_gss_flavor(exp->ex_client);
4211 } else {
4212 nflavs = 1;
4213 flavs[0].pseudoflavor
4214 = exp->ex_client->flavour->flavour;
4215 }
4216 }
4217
4218 supported = 0;
4219 p = xdr_reserve_space(xdr, 4);
4220 if (!p)
4221 return nfserr_resource;
4222 flavorsp = p++;
4223
4224 for (i = 0; i < nflavs; i++) {
4225 rpc_authflavor_t pf = flavs[i].pseudoflavor;
4226 struct rpcsec_gss_info info;
4227
4228 if (rpcauth_get_gssinfo(pf, &info) == 0) {
4229 supported++;
4230 p = xdr_reserve_space(xdr, 4 + 4 +
4231 XDR_LEN(info.oid.len) + 4 + 4);
4232 if (!p)
4233 return nfserr_resource;
4234 *p++ = cpu_to_be32(RPC_AUTH_GSS);
4235 p = xdr_encode_opaque(p, info.oid.data, info.oid.len);
4236 *p++ = cpu_to_be32(info.qop);
4237 *p++ = cpu_to_be32(info.service);
4238 } else if (pf < RPC_AUTH_MAXFLAVOR) {
4239 supported++;
4240 p = xdr_reserve_space(xdr, 4);
4241 if (!p)
4242 return nfserr_resource;
4243 *p++ = cpu_to_be32(pf);
4244 } else {
4245 if (report)
4246 pr_warn("NFS: SECINFO: security flavor %u "
4247 "is not supported\n", pf);
4248 }
4249 }
4250
4251 if (nflavs != supported)
4252 report = false;
4253 *flavorsp = htonl(supported);
4254 return 0;
4255}
4256
4257static __be32
4258nfsd4_encode_secinfo(struct nfsd4_compoundres *resp, __be32 nfserr,
4259 struct nfsd4_secinfo *secinfo)
4260{
4261 struct xdr_stream *xdr = resp->xdr;
4262
4263 return nfsd4_do_encode_secinfo(xdr, secinfo->si_exp);
4264}
4265
4266static __be32
4267nfsd4_encode_secinfo_no_name(struct nfsd4_compoundres *resp, __be32 nfserr,
4268 struct nfsd4_secinfo_no_name *secinfo)
4269{
4270 struct xdr_stream *xdr = resp->xdr;
4271
4272 return nfsd4_do_encode_secinfo(xdr, secinfo->sin_exp);
4273}
4274
4275
4276
4277
4278
4279static __be32
4280nfsd4_encode_setattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setattr *setattr)
4281{
4282 struct xdr_stream *xdr = resp->xdr;
4283 __be32 *p;
4284
4285 p = xdr_reserve_space(xdr, 16);
4286 if (!p)
4287 return nfserr_resource;
4288 if (nfserr) {
4289 *p++ = cpu_to_be32(3);
4290 *p++ = cpu_to_be32(0);
4291 *p++ = cpu_to_be32(0);
4292 *p++ = cpu_to_be32(0);
4293 }
4294 else {
4295 *p++ = cpu_to_be32(3);
4296 *p++ = cpu_to_be32(setattr->sa_bmval[0]);
4297 *p++ = cpu_to_be32(setattr->sa_bmval[1]);
4298 *p++ = cpu_to_be32(setattr->sa_bmval[2]);
4299 }
4300 return nfserr;
4301}
4302
4303static __be32
4304nfsd4_encode_setclientid(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setclientid *scd)
4305{
4306 struct xdr_stream *xdr = resp->xdr;
4307 __be32 *p;
4308
4309 if (!nfserr) {
4310 p = xdr_reserve_space(xdr, 8 + NFS4_VERIFIER_SIZE);
4311 if (!p)
4312 return nfserr_resource;
4313 p = xdr_encode_opaque_fixed(p, &scd->se_clientid, 8);
4314 p = xdr_encode_opaque_fixed(p, &scd->se_confirm,
4315 NFS4_VERIFIER_SIZE);
4316 }
4317 else if (nfserr == nfserr_clid_inuse) {
4318 p = xdr_reserve_space(xdr, 8);
4319 if (!p)
4320 return nfserr_resource;
4321 *p++ = cpu_to_be32(0);
4322 *p++ = cpu_to_be32(0);
4323 }
4324 return nfserr;
4325}
4326
4327static __be32
4328nfsd4_encode_write(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_write *write)
4329{
4330 struct xdr_stream *xdr = resp->xdr;
4331 __be32 *p;
4332
4333 p = xdr_reserve_space(xdr, 16);
4334 if (!p)
4335 return nfserr_resource;
4336 *p++ = cpu_to_be32(write->wr_bytes_written);
4337 *p++ = cpu_to_be32(write->wr_how_written);
4338 p = xdr_encode_opaque_fixed(p, write->wr_verifier.data,
4339 NFS4_VERIFIER_SIZE);
4340 return 0;
4341}
4342
4343static __be32
4344nfsd4_encode_exchange_id(struct nfsd4_compoundres *resp, __be32 nfserr,
4345 struct nfsd4_exchange_id *exid)
4346{
4347 struct xdr_stream *xdr = resp->xdr;
4348 __be32 *p;
4349 char *major_id;
4350 char *server_scope;
4351 int major_id_sz;
4352 int server_scope_sz;
4353 uint64_t minor_id = 0;
4354 struct nfsd_net *nn = net_generic(SVC_NET(resp->rqstp), nfsd_net_id);
4355
4356 major_id = nn->nfsd_name;
4357 major_id_sz = strlen(nn->nfsd_name);
4358 server_scope = nn->nfsd_name;
4359 server_scope_sz = strlen(nn->nfsd_name);
4360
4361 p = xdr_reserve_space(xdr,
4362 8 +
4363 4 +
4364 4 +
4365 4 );
4366 if (!p)
4367 return nfserr_resource;
4368
4369 p = xdr_encode_opaque_fixed(p, &exid->clientid, 8);
4370 *p++ = cpu_to_be32(exid->seqid);
4371 *p++ = cpu_to_be32(exid->flags);
4372
4373 *p++ = cpu_to_be32(exid->spa_how);
4374
4375 switch (exid->spa_how) {
4376 case SP4_NONE:
4377 break;
4378 case SP4_MACH_CRED:
4379
4380 nfserr = nfsd4_encode_bitmap(xdr,
4381 exid->spo_must_enforce[0],
4382 exid->spo_must_enforce[1],
4383 exid->spo_must_enforce[2]);
4384 if (nfserr)
4385 return nfserr;
4386
4387 nfserr = nfsd4_encode_bitmap(xdr,
4388 exid->spo_must_allow[0],
4389 exid->spo_must_allow[1],
4390 exid->spo_must_allow[2]);
4391 if (nfserr)
4392 return nfserr;
4393 break;
4394 default:
4395 WARN_ON_ONCE(1);
4396 }
4397
4398 p = xdr_reserve_space(xdr,
4399 8 +
4400 4 +
4401 (XDR_QUADLEN(major_id_sz) * 4) +
4402 4 +
4403 (XDR_QUADLEN(server_scope_sz) * 4) +
4404 4 );
4405 if (!p)
4406 return nfserr_resource;
4407
4408
4409 p = xdr_encode_hyper(p, minor_id);
4410
4411 p = xdr_encode_opaque(p, major_id, major_id_sz);
4412
4413
4414 p = xdr_encode_opaque(p, server_scope, server_scope_sz);
4415
4416
4417 *p++ = cpu_to_be32(0);
4418 return 0;
4419}
4420
4421static __be32
4422nfsd4_encode_create_session(struct nfsd4_compoundres *resp, __be32 nfserr,
4423 struct nfsd4_create_session *sess)
4424{
4425 struct xdr_stream *xdr = resp->xdr;
4426 __be32 *p;
4427
4428 p = xdr_reserve_space(xdr, 24);
4429 if (!p)
4430 return nfserr_resource;
4431 p = xdr_encode_opaque_fixed(p, sess->sessionid.data,
4432 NFS4_MAX_SESSIONID_LEN);
4433 *p++ = cpu_to_be32(sess->seqid);
4434 *p++ = cpu_to_be32(sess->flags);
4435
4436 p = xdr_reserve_space(xdr, 28);
4437 if (!p)
4438 return nfserr_resource;
4439 *p++ = cpu_to_be32(0);
4440 *p++ = cpu_to_be32(sess->fore_channel.maxreq_sz);
4441 *p++ = cpu_to_be32(sess->fore_channel.maxresp_sz);
4442 *p++ = cpu_to_be32(sess->fore_channel.maxresp_cached);
4443 *p++ = cpu_to_be32(sess->fore_channel.maxops);
4444 *p++ = cpu_to_be32(sess->fore_channel.maxreqs);
4445 *p++ = cpu_to_be32(sess->fore_channel.nr_rdma_attrs);
4446
4447 if (sess->fore_channel.nr_rdma_attrs) {
4448 p = xdr_reserve_space(xdr, 4);
4449 if (!p)
4450 return nfserr_resource;
4451 *p++ = cpu_to_be32(sess->fore_channel.rdma_attrs);
4452 }
4453
4454 p = xdr_reserve_space(xdr, 28);
4455 if (!p)
4456 return nfserr_resource;
4457 *p++ = cpu_to_be32(0);
4458 *p++ = cpu_to_be32(sess->back_channel.maxreq_sz);
4459 *p++ = cpu_to_be32(sess->back_channel.maxresp_sz);
4460 *p++ = cpu_to_be32(sess->back_channel.maxresp_cached);
4461 *p++ = cpu_to_be32(sess->back_channel.maxops);
4462 *p++ = cpu_to_be32(sess->back_channel.maxreqs);
4463 *p++ = cpu_to_be32(sess->back_channel.nr_rdma_attrs);
4464
4465 if (sess->back_channel.nr_rdma_attrs) {
4466 p = xdr_reserve_space(xdr, 4);
4467 if (!p)
4468 return nfserr_resource;
4469 *p++ = cpu_to_be32(sess->back_channel.rdma_attrs);
4470 }
4471 return 0;
4472}
4473
4474static __be32
4475nfsd4_encode_sequence(struct nfsd4_compoundres *resp, __be32 nfserr,
4476 struct nfsd4_sequence *seq)
4477{
4478 struct xdr_stream *xdr = resp->xdr;
4479 __be32 *p;
4480
4481 p = xdr_reserve_space(xdr, NFS4_MAX_SESSIONID_LEN + 20);
4482 if (!p)
4483 return nfserr_resource;
4484 p = xdr_encode_opaque_fixed(p, seq->sessionid.data,
4485 NFS4_MAX_SESSIONID_LEN);
4486 *p++ = cpu_to_be32(seq->seqid);
4487 *p++ = cpu_to_be32(seq->slotid);
4488
4489 *p++ = cpu_to_be32(seq->maxslots - 1);
4490 *p++ = cpu_to_be32(seq->maxslots - 1);
4491 *p++ = cpu_to_be32(seq->status_flags);
4492
4493 resp->cstate.data_offset = xdr->buf->len;
4494 return 0;
4495}
4496
4497static __be32
4498nfsd4_encode_test_stateid(struct nfsd4_compoundres *resp, __be32 nfserr,
4499 struct nfsd4_test_stateid *test_stateid)
4500{
4501 struct xdr_stream *xdr = resp->xdr;
4502 struct nfsd4_test_stateid_id *stateid, *next;
4503 __be32 *p;
4504
4505 p = xdr_reserve_space(xdr, 4 + (4 * test_stateid->ts_num_ids));
4506 if (!p)
4507 return nfserr_resource;
4508 *p++ = htonl(test_stateid->ts_num_ids);
4509
4510 list_for_each_entry_safe(stateid, next, &test_stateid->ts_stateid_list, ts_id_list) {
4511 *p++ = stateid->ts_id_status;
4512 }
4513
4514 return 0;
4515}
4516
4517#ifdef CONFIG_NFSD_PNFS
4518static __be32
4519nfsd4_encode_getdeviceinfo(struct nfsd4_compoundres *resp, __be32 nfserr,
4520 struct nfsd4_getdeviceinfo *gdev)
4521{
4522 struct xdr_stream *xdr = resp->xdr;
4523 const struct nfsd4_layout_ops *ops;
4524 u32 starting_len = xdr->buf->len, needed_len;
4525 __be32 *p;
4526
4527 p = xdr_reserve_space(xdr, 4);
4528 if (!p)
4529 return nfserr_resource;
4530
4531 *p++ = cpu_to_be32(gdev->gd_layout_type);
4532
4533
4534 if (gdev->gd_maxcount != 0) {
4535 ops = nfsd4_layout_ops[gdev->gd_layout_type];
4536 nfserr = ops->encode_getdeviceinfo(xdr, gdev);
4537 if (nfserr) {
4538
4539
4540
4541
4542
4543 if (xdr->buf->len + 4 > gdev->gd_maxcount)
4544 goto toosmall;
4545 return nfserr;
4546 }
4547 }
4548
4549 if (gdev->gd_notify_types) {
4550 p = xdr_reserve_space(xdr, 4 + 4);
4551 if (!p)
4552 return nfserr_resource;
4553 *p++ = cpu_to_be32(1);
4554 *p++ = cpu_to_be32(gdev->gd_notify_types);
4555 } else {
4556 p = xdr_reserve_space(xdr, 4);
4557 if (!p)
4558 return nfserr_resource;
4559 *p++ = 0;
4560 }
4561
4562 return 0;
4563toosmall:
4564 dprintk("%s: maxcount too small\n", __func__);
4565 needed_len = xdr->buf->len + 4 ;
4566 xdr_truncate_encode(xdr, starting_len);
4567 p = xdr_reserve_space(xdr, 4);
4568 if (!p)
4569 return nfserr_resource;
4570 *p++ = cpu_to_be32(needed_len);
4571 return nfserr_toosmall;
4572}
4573
4574static __be32
4575nfsd4_encode_layoutget(struct nfsd4_compoundres *resp, __be32 nfserr,
4576 struct nfsd4_layoutget *lgp)
4577{
4578 struct xdr_stream *xdr = resp->xdr;
4579 const struct nfsd4_layout_ops *ops;
4580 __be32 *p;
4581
4582 p = xdr_reserve_space(xdr, 36 + sizeof(stateid_opaque_t));
4583 if (!p)
4584 return nfserr_resource;
4585
4586 *p++ = cpu_to_be32(1);
4587 *p++ = cpu_to_be32(lgp->lg_sid.si_generation);
4588 p = xdr_encode_opaque_fixed(p, &lgp->lg_sid.si_opaque,
4589 sizeof(stateid_opaque_t));
4590
4591 *p++ = cpu_to_be32(1);
4592 p = xdr_encode_hyper(p, lgp->lg_seg.offset);
4593 p = xdr_encode_hyper(p, lgp->lg_seg.length);
4594 *p++ = cpu_to_be32(lgp->lg_seg.iomode);
4595 *p++ = cpu_to_be32(lgp->lg_layout_type);
4596
4597 ops = nfsd4_layout_ops[lgp->lg_layout_type];
4598 return ops->encode_layoutget(xdr, lgp);
4599}
4600
4601static __be32
4602nfsd4_encode_layoutcommit(struct nfsd4_compoundres *resp, __be32 nfserr,
4603 struct nfsd4_layoutcommit *lcp)
4604{
4605 struct xdr_stream *xdr = resp->xdr;
4606 __be32 *p;
4607
4608 p = xdr_reserve_space(xdr, 4);
4609 if (!p)
4610 return nfserr_resource;
4611 *p++ = cpu_to_be32(lcp->lc_size_chg);
4612 if (lcp->lc_size_chg) {
4613 p = xdr_reserve_space(xdr, 8);
4614 if (!p)
4615 return nfserr_resource;
4616 p = xdr_encode_hyper(p, lcp->lc_newsize);
4617 }
4618
4619 return 0;
4620}
4621
4622static __be32
4623nfsd4_encode_layoutreturn(struct nfsd4_compoundres *resp, __be32 nfserr,
4624 struct nfsd4_layoutreturn *lrp)
4625{
4626 struct xdr_stream *xdr = resp->xdr;
4627 __be32 *p;
4628
4629 p = xdr_reserve_space(xdr, 4);
4630 if (!p)
4631 return nfserr_resource;
4632 *p++ = cpu_to_be32(lrp->lrs_present);
4633 if (lrp->lrs_present)
4634 return nfsd4_encode_stateid(xdr, &lrp->lr_sid);
4635 return 0;
4636}
4637#endif
4638
4639static __be32
4640nfsd42_encode_write_res(struct nfsd4_compoundres *resp,
4641 struct nfsd42_write_res *write, bool sync)
4642{
4643 __be32 *p;
4644 p = xdr_reserve_space(resp->xdr, 4);
4645 if (!p)
4646 return nfserr_resource;
4647
4648 if (sync)
4649 *p++ = cpu_to_be32(0);
4650 else {
4651 __be32 nfserr;
4652 *p++ = cpu_to_be32(1);
4653 nfserr = nfsd4_encode_stateid(resp->xdr, &write->cb_stateid);
4654 if (nfserr)
4655 return nfserr;
4656 }
4657 p = xdr_reserve_space(resp->xdr, 8 + 4 + NFS4_VERIFIER_SIZE);
4658 if (!p)
4659 return nfserr_resource;
4660
4661 p = xdr_encode_hyper(p, write->wr_bytes_written);
4662 *p++ = cpu_to_be32(write->wr_stable_how);
4663 p = xdr_encode_opaque_fixed(p, write->wr_verifier.data,
4664 NFS4_VERIFIER_SIZE);
4665 return nfs_ok;
4666}
4667
4668static __be32
4669nfsd42_encode_nl4_server(struct nfsd4_compoundres *resp, struct nl4_server *ns)
4670{
4671 struct xdr_stream *xdr = resp->xdr;
4672 struct nfs42_netaddr *addr;
4673 __be32 *p;
4674
4675 p = xdr_reserve_space(xdr, 4);
4676 *p++ = cpu_to_be32(ns->nl4_type);
4677
4678 switch (ns->nl4_type) {
4679 case NL4_NETADDR:
4680 addr = &ns->u.nl4_addr;
4681
4682
4683
4684
4685 p = xdr_reserve_space(xdr,
4686 4 +
4687 (XDR_QUADLEN(addr->netid_len) * 4) +
4688 4 +
4689 (XDR_QUADLEN(addr->addr_len) * 4));
4690 if (!p)
4691 return nfserr_resource;
4692
4693 *p++ = cpu_to_be32(addr->netid_len);
4694 p = xdr_encode_opaque_fixed(p, addr->netid,
4695 addr->netid_len);
4696 *p++ = cpu_to_be32(addr->addr_len);
4697 p = xdr_encode_opaque_fixed(p, addr->addr,
4698 addr->addr_len);
4699 break;
4700 default:
4701 WARN_ON_ONCE(ns->nl4_type != NL4_NETADDR);
4702 return nfserr_inval;
4703 }
4704
4705 return 0;
4706}
4707
4708static __be32
4709nfsd4_encode_copy(struct nfsd4_compoundres *resp, __be32 nfserr,
4710 struct nfsd4_copy *copy)
4711{
4712 __be32 *p;
4713
4714 nfserr = nfsd42_encode_write_res(resp, ©->cp_res,
4715 !!copy->cp_synchronous);
4716 if (nfserr)
4717 return nfserr;
4718
4719 p = xdr_reserve_space(resp->xdr, 4 + 4);
4720 *p++ = xdr_one;
4721 *p++ = cpu_to_be32(copy->cp_synchronous);
4722 return 0;
4723}
4724
4725static __be32
4726nfsd4_encode_offload_status(struct nfsd4_compoundres *resp, __be32 nfserr,
4727 struct nfsd4_offload_status *os)
4728{
4729 struct xdr_stream *xdr = resp->xdr;
4730 __be32 *p;
4731
4732 p = xdr_reserve_space(xdr, 8 + 4);
4733 if (!p)
4734 return nfserr_resource;
4735 p = xdr_encode_hyper(p, os->count);
4736 *p++ = cpu_to_be32(0);
4737 return nfserr;
4738}
4739
4740static __be32
4741nfsd4_encode_read_plus_data(struct nfsd4_compoundres *resp,
4742 struct nfsd4_read *read,
4743 unsigned long *maxcount, u32 *eof,
4744 loff_t *pos)
4745{
4746 struct xdr_stream *xdr = resp->xdr;
4747 struct file *file = read->rd_nf->nf_file;
4748 int starting_len = xdr->buf->len;
4749 loff_t hole_pos;
4750 __be32 nfserr;
4751 __be32 *p, tmp;
4752 __be64 tmp64;
4753
4754 hole_pos = pos ? *pos : vfs_llseek(file, read->rd_offset, SEEK_HOLE);
4755 if (hole_pos > read->rd_offset)
4756 *maxcount = min_t(unsigned long, *maxcount, hole_pos - read->rd_offset);
4757 *maxcount = min_t(unsigned long, *maxcount, (xdr->buf->buflen - xdr->buf->len));
4758
4759
4760 p = xdr_reserve_space(xdr, 4 + 8 + 4);
4761 if (!p)
4762 return nfserr_resource;
4763
4764 read->rd_vlen = xdr_reserve_space_vec(xdr, resp->rqstp->rq_vec, *maxcount);
4765 if (read->rd_vlen < 0)
4766 return nfserr_resource;
4767
4768 nfserr = nfsd_readv(resp->rqstp, read->rd_fhp, file, read->rd_offset,
4769 resp->rqstp->rq_vec, read->rd_vlen, maxcount, eof);
4770 if (nfserr)
4771 return nfserr;
4772 xdr_truncate_encode(xdr, starting_len + 16 + xdr_align_size(*maxcount));
4773
4774 tmp = htonl(NFS4_CONTENT_DATA);
4775 write_bytes_to_xdr_buf(xdr->buf, starting_len, &tmp, 4);
4776 tmp64 = cpu_to_be64(read->rd_offset);
4777 write_bytes_to_xdr_buf(xdr->buf, starting_len + 4, &tmp64, 8);
4778 tmp = htonl(*maxcount);
4779 write_bytes_to_xdr_buf(xdr->buf, starting_len + 12, &tmp, 4);
4780
4781 tmp = xdr_zero;
4782 write_bytes_to_xdr_buf(xdr->buf, starting_len + 16 + *maxcount, &tmp,
4783 xdr_pad_size(*maxcount));
4784 return nfs_ok;
4785}
4786
4787static __be32
4788nfsd4_encode_read_plus_hole(struct nfsd4_compoundres *resp,
4789 struct nfsd4_read *read,
4790 unsigned long *maxcount, u32 *eof)
4791{
4792 struct file *file = read->rd_nf->nf_file;
4793 loff_t data_pos = vfs_llseek(file, read->rd_offset, SEEK_DATA);
4794 loff_t f_size = i_size_read(file_inode(file));
4795 unsigned long count;
4796 __be32 *p;
4797
4798 if (data_pos == -ENXIO)
4799 data_pos = f_size;
4800 else if (data_pos <= read->rd_offset || (data_pos < f_size && data_pos % PAGE_SIZE))
4801 return nfsd4_encode_read_plus_data(resp, read, maxcount, eof, &f_size);
4802 count = data_pos - read->rd_offset;
4803
4804
4805 p = xdr_reserve_space(resp->xdr, 4 + 8 + 8);
4806 if (!p)
4807 return nfserr_resource;
4808
4809 *p++ = htonl(NFS4_CONTENT_HOLE);
4810 p = xdr_encode_hyper(p, read->rd_offset);
4811 p = xdr_encode_hyper(p, count);
4812
4813 *eof = (read->rd_offset + count) >= f_size;
4814 *maxcount = min_t(unsigned long, count, *maxcount);
4815 return nfs_ok;
4816}
4817
4818static __be32
4819nfsd4_encode_read_plus(struct nfsd4_compoundres *resp, __be32 nfserr,
4820 struct nfsd4_read *read)
4821{
4822 unsigned long maxcount, count;
4823 struct xdr_stream *xdr = resp->xdr;
4824 struct file *file;
4825 int starting_len = xdr->buf->len;
4826 int last_segment = xdr->buf->len;
4827 int segments = 0;
4828 __be32 *p, tmp;
4829 bool is_data;
4830 loff_t pos;
4831 u32 eof;
4832
4833 if (nfserr)
4834 return nfserr;
4835 file = read->rd_nf->nf_file;
4836
4837
4838 p = xdr_reserve_space(xdr, 4 + 4);
4839 if (!p)
4840 return nfserr_resource;
4841 xdr_commit_encode(xdr);
4842
4843 maxcount = svc_max_payload(resp->rqstp);
4844 maxcount = min_t(unsigned long, maxcount,
4845 (xdr->buf->buflen - xdr->buf->len));
4846 maxcount = min_t(unsigned long, maxcount, read->rd_length);
4847 count = maxcount;
4848
4849 eof = read->rd_offset >= i_size_read(file_inode(file));
4850 if (eof)
4851 goto out;
4852
4853 pos = vfs_llseek(file, read->rd_offset, SEEK_HOLE);
4854 is_data = pos > read->rd_offset;
4855
4856 while (count > 0 && !eof) {
4857 maxcount = count;
4858 if (is_data)
4859 nfserr = nfsd4_encode_read_plus_data(resp, read, &maxcount, &eof,
4860 segments == 0 ? &pos : NULL);
4861 else
4862 nfserr = nfsd4_encode_read_plus_hole(resp, read, &maxcount, &eof);
4863 if (nfserr)
4864 goto out;
4865 count -= maxcount;
4866 read->rd_offset += maxcount;
4867 is_data = !is_data;
4868 last_segment = xdr->buf->len;
4869 segments++;
4870 }
4871
4872out:
4873 if (nfserr && segments == 0)
4874 xdr_truncate_encode(xdr, starting_len);
4875 else {
4876 if (nfserr) {
4877 xdr_truncate_encode(xdr, last_segment);
4878 nfserr = nfs_ok;
4879 eof = 0;
4880 }
4881 tmp = htonl(eof);
4882 write_bytes_to_xdr_buf(xdr->buf, starting_len, &tmp, 4);
4883 tmp = htonl(segments);
4884 write_bytes_to_xdr_buf(xdr->buf, starting_len + 4, &tmp, 4);
4885 }
4886
4887 return nfserr;
4888}
4889
4890static __be32
4891nfsd4_encode_copy_notify(struct nfsd4_compoundres *resp, __be32 nfserr,
4892 struct nfsd4_copy_notify *cn)
4893{
4894 struct xdr_stream *xdr = resp->xdr;
4895 __be32 *p;
4896
4897 if (nfserr)
4898 return nfserr;
4899
4900
4901 p = xdr_reserve_space(xdr, 12);
4902 if (!p)
4903 return nfserr_resource;
4904
4905
4906 p = xdr_encode_hyper(p, cn->cpn_sec);
4907 *p++ = cpu_to_be32(cn->cpn_nsec);
4908
4909
4910 nfserr = nfsd4_encode_stateid(xdr, &cn->cpn_cnr_stateid);
4911 if (nfserr)
4912 return nfserr;
4913
4914
4915 p = xdr_reserve_space(xdr, 4);
4916 if (!p)
4917 return nfserr_resource;
4918
4919 *p++ = cpu_to_be32(1);
4920
4921 return nfsd42_encode_nl4_server(resp, &cn->cpn_src);
4922}
4923
4924static __be32
4925nfsd4_encode_seek(struct nfsd4_compoundres *resp, __be32 nfserr,
4926 struct nfsd4_seek *seek)
4927{
4928 __be32 *p;
4929
4930 p = xdr_reserve_space(resp->xdr, 4 + 8);
4931 *p++ = cpu_to_be32(seek->seek_eof);
4932 p = xdr_encode_hyper(p, seek->seek_pos);
4933
4934 return 0;
4935}
4936
4937static __be32
4938nfsd4_encode_noop(struct nfsd4_compoundres *resp, __be32 nfserr, void *p)
4939{
4940 return nfserr;
4941}
4942
4943
4944
4945
4946static __be32
4947nfsd4_vbuf_to_stream(struct xdr_stream *xdr, char *buf, u32 buflen)
4948{
4949 u32 cplen;
4950 __be32 *p;
4951
4952 cplen = min_t(unsigned long, buflen,
4953 ((void *)xdr->end - (void *)xdr->p));
4954 p = xdr_reserve_space(xdr, cplen);
4955 if (!p)
4956 return nfserr_resource;
4957
4958 memcpy(p, buf, cplen);
4959 buf += cplen;
4960 buflen -= cplen;
4961
4962 while (buflen) {
4963 cplen = min_t(u32, buflen, PAGE_SIZE);
4964 p = xdr_reserve_space(xdr, cplen);
4965 if (!p)
4966 return nfserr_resource;
4967
4968 memcpy(p, buf, cplen);
4969
4970 if (cplen < PAGE_SIZE) {
4971
4972
4973
4974
4975
4976 xdr_encode_opaque_fixed(p, NULL, cplen);
4977 break;
4978 }
4979
4980 buflen -= PAGE_SIZE;
4981 buf += PAGE_SIZE;
4982 }
4983
4984 return 0;
4985}
4986
4987static __be32
4988nfsd4_encode_getxattr(struct nfsd4_compoundres *resp, __be32 nfserr,
4989 struct nfsd4_getxattr *getxattr)
4990{
4991 struct xdr_stream *xdr = resp->xdr;
4992 __be32 *p, err;
4993
4994 p = xdr_reserve_space(xdr, 4);
4995 if (!p)
4996 return nfserr_resource;
4997
4998 *p = cpu_to_be32(getxattr->getxa_len);
4999
5000 if (getxattr->getxa_len == 0)
5001 return 0;
5002
5003 err = nfsd4_vbuf_to_stream(xdr, getxattr->getxa_buf,
5004 getxattr->getxa_len);
5005
5006 kvfree(getxattr->getxa_buf);
5007
5008 return err;
5009}
5010
5011static __be32
5012nfsd4_encode_setxattr(struct nfsd4_compoundres *resp, __be32 nfserr,
5013 struct nfsd4_setxattr *setxattr)
5014{
5015 struct xdr_stream *xdr = resp->xdr;
5016 __be32 *p;
5017
5018 p = xdr_reserve_space(xdr, 20);
5019 if (!p)
5020 return nfserr_resource;
5021
5022 encode_cinfo(p, &setxattr->setxa_cinfo);
5023
5024 return 0;
5025}
5026
5027
5028
5029
5030static __be32
5031nfsd4_listxattr_validate_cookie(struct nfsd4_listxattrs *listxattrs,
5032 u32 *offsetp)
5033{
5034 u64 cookie = listxattrs->lsxa_cookie;
5035
5036
5037
5038
5039
5040
5041 if (cookie > (listxattrs->lsxa_len) / (XATTR_USER_PREFIX_LEN + 2))
5042 return nfserr_badcookie;
5043
5044 if (cookie > (listxattrs->lsxa_maxcount /
5045 (XDR_QUADLEN(XATTR_USER_PREFIX_LEN + 2) + 4)))
5046 return nfserr_badcookie;
5047
5048 *offsetp = (u32)cookie;
5049 return 0;
5050}
5051
5052static __be32
5053nfsd4_encode_listxattrs(struct nfsd4_compoundres *resp, __be32 nfserr,
5054 struct nfsd4_listxattrs *listxattrs)
5055{
5056 struct xdr_stream *xdr = resp->xdr;
5057 u32 cookie_offset, count_offset, eof;
5058 u32 left, xdrleft, slen, count;
5059 u32 xdrlen, offset;
5060 u64 cookie;
5061 char *sp;
5062 __be32 status, tmp;
5063 __be32 *p;
5064 u32 nuser;
5065
5066 eof = 1;
5067
5068 status = nfsd4_listxattr_validate_cookie(listxattrs, &offset);
5069 if (status)
5070 goto out;
5071
5072
5073
5074
5075
5076 cookie_offset = xdr->buf->len;
5077 count_offset = cookie_offset + 8;
5078 p = xdr_reserve_space(xdr, 12);
5079 if (!p) {
5080 status = nfserr_resource;
5081 goto out;
5082 }
5083
5084 count = 0;
5085 left = listxattrs->lsxa_len;
5086 sp = listxattrs->lsxa_buf;
5087 nuser = 0;
5088
5089 xdrleft = listxattrs->lsxa_maxcount;
5090
5091 while (left > 0 && xdrleft > 0) {
5092 slen = strlen(sp);
5093
5094
5095
5096
5097 if (strncmp(sp, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN))
5098 goto contloop;
5099
5100 slen -= XATTR_USER_PREFIX_LEN;
5101 xdrlen = 4 + ((slen + 3) & ~3);
5102 if (xdrlen > xdrleft) {
5103 if (count == 0) {
5104
5105
5106
5107 status = nfserr_toosmall;
5108 goto out;
5109 }
5110 eof = 0;
5111 goto wreof;
5112 }
5113
5114 left -= XATTR_USER_PREFIX_LEN;
5115 sp += XATTR_USER_PREFIX_LEN;
5116 if (nuser++ < offset)
5117 goto contloop;
5118
5119
5120 p = xdr_reserve_space(xdr, xdrlen);
5121 if (!p) {
5122 status = nfserr_resource;
5123 goto out;
5124 }
5125
5126 xdr_encode_opaque(p, sp, slen);
5127
5128 xdrleft -= xdrlen;
5129 count++;
5130contloop:
5131 sp += slen + 1;
5132 left -= slen + 1;
5133 }
5134
5135
5136
5137
5138
5139 if (nuser > 0 && count == 0) {
5140 status = nfserr_badcookie;
5141 goto out;
5142 }
5143
5144wreof:
5145 p = xdr_reserve_space(xdr, 4);
5146 if (!p) {
5147 status = nfserr_resource;
5148 goto out;
5149 }
5150 *p = cpu_to_be32(eof);
5151
5152 cookie = offset + count;
5153
5154 write_bytes_to_xdr_buf(xdr->buf, cookie_offset, &cookie, 8);
5155 tmp = cpu_to_be32(count);
5156 write_bytes_to_xdr_buf(xdr->buf, count_offset, &tmp, 4);
5157out:
5158 if (listxattrs->lsxa_len)
5159 kvfree(listxattrs->lsxa_buf);
5160 return status;
5161}
5162
5163static __be32
5164nfsd4_encode_removexattr(struct nfsd4_compoundres *resp, __be32 nfserr,
5165 struct nfsd4_removexattr *removexattr)
5166{
5167 struct xdr_stream *xdr = resp->xdr;
5168 __be32 *p;
5169
5170 p = xdr_reserve_space(xdr, 20);
5171 if (!p)
5172 return nfserr_resource;
5173
5174 p = encode_cinfo(p, &removexattr->rmxa_cinfo);
5175 return 0;
5176}
5177
5178typedef __be32(* nfsd4_enc)(struct nfsd4_compoundres *, __be32, void *);
5179
5180
5181
5182
5183
5184
5185static const nfsd4_enc nfsd4_enc_ops[] = {
5186 [OP_ACCESS] = (nfsd4_enc)nfsd4_encode_access,
5187 [OP_CLOSE] = (nfsd4_enc)nfsd4_encode_close,
5188 [OP_COMMIT] = (nfsd4_enc)nfsd4_encode_commit,
5189 [OP_CREATE] = (nfsd4_enc)nfsd4_encode_create,
5190 [OP_DELEGPURGE] = (nfsd4_enc)nfsd4_encode_noop,
5191 [OP_DELEGRETURN] = (nfsd4_enc)nfsd4_encode_noop,
5192 [OP_GETATTR] = (nfsd4_enc)nfsd4_encode_getattr,
5193 [OP_GETFH] = (nfsd4_enc)nfsd4_encode_getfh,
5194 [OP_LINK] = (nfsd4_enc)nfsd4_encode_link,
5195 [OP_LOCK] = (nfsd4_enc)nfsd4_encode_lock,
5196 [OP_LOCKT] = (nfsd4_enc)nfsd4_encode_lockt,
5197 [OP_LOCKU] = (nfsd4_enc)nfsd4_encode_locku,
5198 [OP_LOOKUP] = (nfsd4_enc)nfsd4_encode_noop,
5199 [OP_LOOKUPP] = (nfsd4_enc)nfsd4_encode_noop,
5200 [OP_NVERIFY] = (nfsd4_enc)nfsd4_encode_noop,
5201 [OP_OPEN] = (nfsd4_enc)nfsd4_encode_open,
5202 [OP_OPENATTR] = (nfsd4_enc)nfsd4_encode_noop,
5203 [OP_OPEN_CONFIRM] = (nfsd4_enc)nfsd4_encode_open_confirm,
5204 [OP_OPEN_DOWNGRADE] = (nfsd4_enc)nfsd4_encode_open_downgrade,
5205 [OP_PUTFH] = (nfsd4_enc)nfsd4_encode_noop,
5206 [OP_PUTPUBFH] = (nfsd4_enc)nfsd4_encode_noop,
5207 [OP_PUTROOTFH] = (nfsd4_enc)nfsd4_encode_noop,
5208 [OP_READ] = (nfsd4_enc)nfsd4_encode_read,
5209 [OP_READDIR] = (nfsd4_enc)nfsd4_encode_readdir,
5210 [OP_READLINK] = (nfsd4_enc)nfsd4_encode_readlink,
5211 [OP_REMOVE] = (nfsd4_enc)nfsd4_encode_remove,
5212 [OP_RENAME] = (nfsd4_enc)nfsd4_encode_rename,
5213 [OP_RENEW] = (nfsd4_enc)nfsd4_encode_noop,
5214 [OP_RESTOREFH] = (nfsd4_enc)nfsd4_encode_noop,
5215 [OP_SAVEFH] = (nfsd4_enc)nfsd4_encode_noop,
5216 [OP_SECINFO] = (nfsd4_enc)nfsd4_encode_secinfo,
5217 [OP_SETATTR] = (nfsd4_enc)nfsd4_encode_setattr,
5218 [OP_SETCLIENTID] = (nfsd4_enc)nfsd4_encode_setclientid,
5219 [OP_SETCLIENTID_CONFIRM] = (nfsd4_enc)nfsd4_encode_noop,
5220 [OP_VERIFY] = (nfsd4_enc)nfsd4_encode_noop,
5221 [OP_WRITE] = (nfsd4_enc)nfsd4_encode_write,
5222 [OP_RELEASE_LOCKOWNER] = (nfsd4_enc)nfsd4_encode_noop,
5223
5224
5225 [OP_BACKCHANNEL_CTL] = (nfsd4_enc)nfsd4_encode_noop,
5226 [OP_BIND_CONN_TO_SESSION] = (nfsd4_enc)nfsd4_encode_bind_conn_to_session,
5227 [OP_EXCHANGE_ID] = (nfsd4_enc)nfsd4_encode_exchange_id,
5228 [OP_CREATE_SESSION] = (nfsd4_enc)nfsd4_encode_create_session,
5229 [OP_DESTROY_SESSION] = (nfsd4_enc)nfsd4_encode_noop,
5230 [OP_FREE_STATEID] = (nfsd4_enc)nfsd4_encode_noop,
5231 [OP_GET_DIR_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop,
5232#ifdef CONFIG_NFSD_PNFS
5233 [OP_GETDEVICEINFO] = (nfsd4_enc)nfsd4_encode_getdeviceinfo,
5234 [OP_GETDEVICELIST] = (nfsd4_enc)nfsd4_encode_noop,
5235 [OP_LAYOUTCOMMIT] = (nfsd4_enc)nfsd4_encode_layoutcommit,
5236 [OP_LAYOUTGET] = (nfsd4_enc)nfsd4_encode_layoutget,
5237 [OP_LAYOUTRETURN] = (nfsd4_enc)nfsd4_encode_layoutreturn,
5238#else
5239 [OP_GETDEVICEINFO] = (nfsd4_enc)nfsd4_encode_noop,
5240 [OP_GETDEVICELIST] = (nfsd4_enc)nfsd4_encode_noop,
5241 [OP_LAYOUTCOMMIT] = (nfsd4_enc)nfsd4_encode_noop,
5242 [OP_LAYOUTGET] = (nfsd4_enc)nfsd4_encode_noop,
5243 [OP_LAYOUTRETURN] = (nfsd4_enc)nfsd4_encode_noop,
5244#endif
5245 [OP_SECINFO_NO_NAME] = (nfsd4_enc)nfsd4_encode_secinfo_no_name,
5246 [OP_SEQUENCE] = (nfsd4_enc)nfsd4_encode_sequence,
5247 [OP_SET_SSV] = (nfsd4_enc)nfsd4_encode_noop,
5248 [OP_TEST_STATEID] = (nfsd4_enc)nfsd4_encode_test_stateid,
5249 [OP_WANT_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop,
5250 [OP_DESTROY_CLIENTID] = (nfsd4_enc)nfsd4_encode_noop,
5251 [OP_RECLAIM_COMPLETE] = (nfsd4_enc)nfsd4_encode_noop,
5252
5253
5254 [OP_ALLOCATE] = (nfsd4_enc)nfsd4_encode_noop,
5255 [OP_COPY] = (nfsd4_enc)nfsd4_encode_copy,
5256 [OP_COPY_NOTIFY] = (nfsd4_enc)nfsd4_encode_copy_notify,
5257 [OP_DEALLOCATE] = (nfsd4_enc)nfsd4_encode_noop,
5258 [OP_IO_ADVISE] = (nfsd4_enc)nfsd4_encode_noop,
5259 [OP_LAYOUTERROR] = (nfsd4_enc)nfsd4_encode_noop,
5260 [OP_LAYOUTSTATS] = (nfsd4_enc)nfsd4_encode_noop,
5261 [OP_OFFLOAD_CANCEL] = (nfsd4_enc)nfsd4_encode_noop,
5262 [OP_OFFLOAD_STATUS] = (nfsd4_enc)nfsd4_encode_offload_status,
5263 [OP_READ_PLUS] = (nfsd4_enc)nfsd4_encode_read_plus,
5264 [OP_SEEK] = (nfsd4_enc)nfsd4_encode_seek,
5265 [OP_WRITE_SAME] = (nfsd4_enc)nfsd4_encode_noop,
5266 [OP_CLONE] = (nfsd4_enc)nfsd4_encode_noop,
5267
5268
5269 [OP_GETXATTR] = (nfsd4_enc)nfsd4_encode_getxattr,
5270 [OP_SETXATTR] = (nfsd4_enc)nfsd4_encode_setxattr,
5271 [OP_LISTXATTRS] = (nfsd4_enc)nfsd4_encode_listxattrs,
5272 [OP_REMOVEXATTR] = (nfsd4_enc)nfsd4_encode_removexattr,
5273};
5274
5275
5276
5277
5278
5279
5280
5281
5282
5283
5284
5285
5286
5287
5288__be32 nfsd4_check_resp_size(struct nfsd4_compoundres *resp, u32 respsize)
5289{
5290 struct xdr_buf *buf = &resp->rqstp->rq_res;
5291 struct nfsd4_slot *slot = resp->cstate.slot;
5292
5293 if (buf->len + respsize <= buf->buflen)
5294 return nfs_ok;
5295 if (!nfsd4_has_session(&resp->cstate))
5296 return nfserr_resource;
5297 if (slot->sl_flags & NFSD4_SLOT_CACHETHIS) {
5298 WARN_ON_ONCE(1);
5299 return nfserr_rep_too_big_to_cache;
5300 }
5301 return nfserr_rep_too_big;
5302}
5303
5304void
5305nfsd4_encode_operation(struct nfsd4_compoundres *resp, struct nfsd4_op *op)
5306{
5307 struct xdr_stream *xdr = resp->xdr;
5308 struct nfs4_stateowner *so = resp->cstate.replay_owner;
5309 struct svc_rqst *rqstp = resp->rqstp;
5310 const struct nfsd4_operation *opdesc = op->opdesc;
5311 int post_err_offset;
5312 nfsd4_enc encoder;
5313 __be32 *p;
5314
5315 p = xdr_reserve_space(xdr, 8);
5316 if (!p) {
5317 WARN_ON_ONCE(1);
5318 return;
5319 }
5320 *p++ = cpu_to_be32(op->opnum);
5321 post_err_offset = xdr->buf->len;
5322
5323 if (op->opnum == OP_ILLEGAL)
5324 goto status;
5325 if (op->status && opdesc &&
5326 !(opdesc->op_flags & OP_NONTRIVIAL_ERROR_ENCODE))
5327 goto status;
5328 BUG_ON(op->opnum >= ARRAY_SIZE(nfsd4_enc_ops) ||
5329 !nfsd4_enc_ops[op->opnum]);
5330 encoder = nfsd4_enc_ops[op->opnum];
5331 op->status = encoder(resp, op->status, &op->u);
5332 if (op->status)
5333 trace_nfsd_compound_encode_err(rqstp, op->opnum, op->status);
5334 if (opdesc && opdesc->op_release)
5335 opdesc->op_release(&op->u);
5336 xdr_commit_encode(xdr);
5337
5338
5339 if (!op->status) {
5340 int space_needed = 0;
5341 if (!nfsd4_last_compound_op(rqstp))
5342 space_needed = COMPOUND_ERR_SLACK_SPACE;
5343 op->status = nfsd4_check_resp_size(resp, space_needed);
5344 }
5345 if (op->status == nfserr_resource && nfsd4_has_session(&resp->cstate)) {
5346 struct nfsd4_slot *slot = resp->cstate.slot;
5347
5348 if (slot->sl_flags & NFSD4_SLOT_CACHETHIS)
5349 op->status = nfserr_rep_too_big_to_cache;
5350 else
5351 op->status = nfserr_rep_too_big;
5352 }
5353 if (op->status == nfserr_resource ||
5354 op->status == nfserr_rep_too_big ||
5355 op->status == nfserr_rep_too_big_to_cache) {
5356
5357
5358
5359
5360
5361
5362
5363 warn_on_nonidempotent_op(op);
5364 xdr_truncate_encode(xdr, post_err_offset);
5365 }
5366 if (so) {
5367 int len = xdr->buf->len - post_err_offset;
5368
5369 so->so_replay.rp_status = op->status;
5370 so->so_replay.rp_buflen = len;
5371 read_bytes_from_xdr_buf(xdr->buf, post_err_offset,
5372 so->so_replay.rp_buf, len);
5373 }
5374status:
5375
5376 write_bytes_to_xdr_buf(xdr->buf, post_err_offset - 4, &op->status, 4);
5377}
5378
5379
5380
5381
5382
5383
5384
5385void
5386nfsd4_encode_replay(struct xdr_stream *xdr, struct nfsd4_op *op)
5387{
5388 __be32 *p;
5389 struct nfs4_replay *rp = op->replay;
5390
5391 p = xdr_reserve_space(xdr, 8 + rp->rp_buflen);
5392 if (!p) {
5393 WARN_ON_ONCE(1);
5394 return;
5395 }
5396 *p++ = cpu_to_be32(op->opnum);
5397 *p++ = rp->rp_status;
5398
5399 p = xdr_encode_opaque_fixed(p, rp->rp_buf, rp->rp_buflen);
5400}
5401
5402void nfsd4_release_compoundargs(struct svc_rqst *rqstp)
5403{
5404 struct nfsd4_compoundargs *args = rqstp->rq_argp;
5405
5406 if (args->ops != args->iops) {
5407 kfree(args->ops);
5408 args->ops = args->iops;
5409 }
5410 while (args->to_free) {
5411 struct svcxdr_tmpbuf *tb = args->to_free;
5412 args->to_free = tb->next;
5413 kfree(tb);
5414 }
5415}
5416
5417int
5418nfs4svc_decode_compoundargs(struct svc_rqst *rqstp, __be32 *p)
5419{
5420 struct nfsd4_compoundargs *args = rqstp->rq_argp;
5421
5422
5423 args->to_free = NULL;
5424
5425 args->xdr = &rqstp->rq_arg_stream;
5426 args->ops = args->iops;
5427 args->rqstp = rqstp;
5428
5429 return nfsd4_decode_compound(args);
5430}
5431
5432int
5433nfs4svc_encode_compoundres(struct svc_rqst *rqstp, __be32 *p)
5434{
5435 struct nfsd4_compoundres *resp = rqstp->rq_resp;
5436 struct xdr_buf *buf = resp->xdr->buf;
5437
5438 WARN_ON_ONCE(buf->len != buf->head[0].iov_len + buf->page_len +
5439 buf->tail[0].iov_len);
5440
5441 *p = resp->cstate.status;
5442
5443 rqstp->rq_next_page = resp->xdr->page_ptr + 1;
5444
5445 p = resp->tagp;
5446 *p++ = htonl(resp->taglen);
5447 memcpy(p, resp->tag, resp->taglen);
5448 p += XDR_QUADLEN(resp->taglen);
5449 *p++ = htonl(resp->opcnt);
5450
5451 nfsd4_sequence_done(resp);
5452 return 1;
5453}
5454