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Merge tag 'regulator-v3.15-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git...
[deliverable/linux.git] / fs / nfsd / nfs4xdr.c
1 /*
2 * Server-side XDR for NFSv4
3 *
4 * Copyright (c) 2002 The Regents of the University of Michigan.
5 * All rights reserved.
6 *
7 * Kendrick Smith <kmsmith@umich.edu>
8 * Andy Adamson <andros@umich.edu>
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 *
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in the
18 * documentation and/or other materials provided with the distribution.
19 * 3. Neither the name of the University nor the names of its
20 * contributors may be used to endorse or promote products derived
21 * from this software without specific prior written permission.
22 *
23 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
24 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
25 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
26 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
28 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
29 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
30 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
31 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
32 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
33 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
34 *
35 * TODO: Neil Brown made the following observation: We currently
36 * initially reserve NFSD_BUFSIZE space on the transmit queue and
37 * never release any of that until the request is complete.
38 * It would be good to calculate a new maximum response size while
39 * decoding the COMPOUND, and call svc_reserve with this number
40 * at the end of nfs4svc_decode_compoundargs.
41 */
42
43 #include <linux/slab.h>
44 #include <linux/namei.h>
45 #include <linux/statfs.h>
46 #include <linux/utsname.h>
47 #include <linux/pagemap.h>
48 #include <linux/sunrpc/svcauth_gss.h>
49
50 #include "idmap.h"
51 #include "acl.h"
52 #include "xdr4.h"
53 #include "vfs.h"
54 #include "state.h"
55 #include "cache.h"
56 #include "netns.h"
57
58 #ifdef CONFIG_NFSD_V4_SECURITY_LABEL
59 #include <linux/security.h>
60 #endif
61
62
63 #define NFSDDBG_FACILITY NFSDDBG_XDR
64
65 /*
66 * As per referral draft, the fsid for a referral MUST be different from the fsid of the containing
67 * directory in order to indicate to the client that a filesystem boundary is present
68 * We use a fixed fsid for a referral
69 */
70 #define NFS4_REFERRAL_FSID_MAJOR 0x8000000ULL
71 #define NFS4_REFERRAL_FSID_MINOR 0x8000000ULL
72
73 static __be32
74 check_filename(char *str, int len)
75 {
76 int i;
77
78 if (len == 0)
79 return nfserr_inval;
80 if (isdotent(str, len))
81 return nfserr_badname;
82 for (i = 0; i < len; i++)
83 if (str[i] == '/')
84 return nfserr_badname;
85 return 0;
86 }
87
88 #define DECODE_HEAD \
89 __be32 *p; \
90 __be32 status
91 #define DECODE_TAIL \
92 status = 0; \
93 out: \
94 return status; \
95 xdr_error: \
96 dprintk("NFSD: xdr error (%s:%d)\n", \
97 __FILE__, __LINE__); \
98 status = nfserr_bad_xdr; \
99 goto out
100
101 #define READ32(x) (x) = ntohl(*p++)
102 #define READ64(x) do { \
103 (x) = (u64)ntohl(*p++) << 32; \
104 (x) |= ntohl(*p++); \
105 } while (0)
106 #define READMEM(x,nbytes) do { \
107 x = (char *)p; \
108 p += XDR_QUADLEN(nbytes); \
109 } while (0)
110 #define SAVEMEM(x,nbytes) do { \
111 if (!(x = (p==argp->tmp || p == argp->tmpp) ? \
112 savemem(argp, p, nbytes) : \
113 (char *)p)) { \
114 dprintk("NFSD: xdr error (%s:%d)\n", \
115 __FILE__, __LINE__); \
116 goto xdr_error; \
117 } \
118 p += XDR_QUADLEN(nbytes); \
119 } while (0)
120 #define COPYMEM(x,nbytes) do { \
121 memcpy((x), p, nbytes); \
122 p += XDR_QUADLEN(nbytes); \
123 } while (0)
124
125 /* READ_BUF, read_buf(): nbytes must be <= PAGE_SIZE */
126 #define READ_BUF(nbytes) do { \
127 if (nbytes <= (u32)((char *)argp->end - (char *)argp->p)) { \
128 p = argp->p; \
129 argp->p += XDR_QUADLEN(nbytes); \
130 } else if (!(p = read_buf(argp, nbytes))) { \
131 dprintk("NFSD: xdr error (%s:%d)\n", \
132 __FILE__, __LINE__); \
133 goto xdr_error; \
134 } \
135 } while (0)
136
137 static void next_decode_page(struct nfsd4_compoundargs *argp)
138 {
139 argp->p = page_address(argp->pagelist[0]);
140 argp->pagelist++;
141 if (argp->pagelen < PAGE_SIZE) {
142 argp->end = argp->p + (argp->pagelen>>2);
143 argp->pagelen = 0;
144 } else {
145 argp->end = argp->p + (PAGE_SIZE>>2);
146 argp->pagelen -= PAGE_SIZE;
147 }
148 }
149
150 static __be32 *read_buf(struct nfsd4_compoundargs *argp, u32 nbytes)
151 {
152 /* We want more bytes than seem to be available.
153 * Maybe we need a new page, maybe we have just run out
154 */
155 unsigned int avail = (char *)argp->end - (char *)argp->p;
156 __be32 *p;
157 if (avail + argp->pagelen < nbytes)
158 return NULL;
159 if (avail + PAGE_SIZE < nbytes) /* need more than a page !! */
160 return NULL;
161 /* ok, we can do it with the current plus the next page */
162 if (nbytes <= sizeof(argp->tmp))
163 p = argp->tmp;
164 else {
165 kfree(argp->tmpp);
166 p = argp->tmpp = kmalloc(nbytes, GFP_KERNEL);
167 if (!p)
168 return NULL;
169
170 }
171 /*
172 * The following memcpy is safe because read_buf is always
173 * called with nbytes > avail, and the two cases above both
174 * guarantee p points to at least nbytes bytes.
175 */
176 memcpy(p, argp->p, avail);
177 next_decode_page(argp);
178 memcpy(((char*)p)+avail, argp->p, (nbytes - avail));
179 argp->p += XDR_QUADLEN(nbytes - avail);
180 return p;
181 }
182
183 static int zero_clientid(clientid_t *clid)
184 {
185 return (clid->cl_boot == 0) && (clid->cl_id == 0);
186 }
187
188 /**
189 * defer_free - mark an allocation as deferred freed
190 * @argp: NFSv4 compound argument structure to be freed with
191 * @release: release callback to free @p, typically kfree()
192 * @p: pointer to be freed
193 *
194 * Marks @p to be freed when processing the compound operation
195 * described in @argp finishes.
196 */
197 static int
198 defer_free(struct nfsd4_compoundargs *argp,
199 void (*release)(const void *), void *p)
200 {
201 struct tmpbuf *tb;
202
203 tb = kmalloc(sizeof(*tb), GFP_KERNEL);
204 if (!tb)
205 return -ENOMEM;
206 tb->buf = p;
207 tb->release = release;
208 tb->next = argp->to_free;
209 argp->to_free = tb;
210 return 0;
211 }
212
213 /**
214 * savemem - duplicate a chunk of memory for later processing
215 * @argp: NFSv4 compound argument structure to be freed with
216 * @p: pointer to be duplicated
217 * @nbytes: length to be duplicated
218 *
219 * Returns a pointer to a copy of @nbytes bytes of memory at @p
220 * that are preserved until processing of the NFSv4 compound
221 * operation described by @argp finishes.
222 */
223 static char *savemem(struct nfsd4_compoundargs *argp, __be32 *p, int nbytes)
224 {
225 if (p == argp->tmp) {
226 p = kmemdup(argp->tmp, nbytes, GFP_KERNEL);
227 if (!p)
228 return NULL;
229 } else {
230 BUG_ON(p != argp->tmpp);
231 argp->tmpp = NULL;
232 }
233 if (defer_free(argp, kfree, p)) {
234 kfree(p);
235 return NULL;
236 } else
237 return (char *)p;
238 }
239
240 static __be32
241 nfsd4_decode_bitmap(struct nfsd4_compoundargs *argp, u32 *bmval)
242 {
243 u32 bmlen;
244 DECODE_HEAD;
245
246 bmval[0] = 0;
247 bmval[1] = 0;
248 bmval[2] = 0;
249
250 READ_BUF(4);
251 READ32(bmlen);
252 if (bmlen > 1000)
253 goto xdr_error;
254
255 READ_BUF(bmlen << 2);
256 if (bmlen > 0)
257 READ32(bmval[0]);
258 if (bmlen > 1)
259 READ32(bmval[1]);
260 if (bmlen > 2)
261 READ32(bmval[2]);
262
263 DECODE_TAIL;
264 }
265
266 static __be32
267 nfsd4_decode_fattr(struct nfsd4_compoundargs *argp, u32 *bmval,
268 struct iattr *iattr, struct nfs4_acl **acl,
269 struct xdr_netobj *label)
270 {
271 int expected_len, len = 0;
272 u32 dummy32;
273 char *buf;
274
275 DECODE_HEAD;
276 iattr->ia_valid = 0;
277 if ((status = nfsd4_decode_bitmap(argp, bmval)))
278 return status;
279
280 READ_BUF(4);
281 READ32(expected_len);
282
283 if (bmval[0] & FATTR4_WORD0_SIZE) {
284 READ_BUF(8);
285 len += 8;
286 READ64(iattr->ia_size);
287 iattr->ia_valid |= ATTR_SIZE;
288 }
289 if (bmval[0] & FATTR4_WORD0_ACL) {
290 u32 nace;
291 struct nfs4_ace *ace;
292
293 READ_BUF(4); len += 4;
294 READ32(nace);
295
296 if (nace > NFS4_ACL_MAX)
297 return nfserr_fbig;
298
299 *acl = nfs4_acl_new(nace);
300 if (*acl == NULL)
301 return nfserr_jukebox;
302
303 defer_free(argp, kfree, *acl);
304
305 (*acl)->naces = nace;
306 for (ace = (*acl)->aces; ace < (*acl)->aces + nace; ace++) {
307 READ_BUF(16); len += 16;
308 READ32(ace->type);
309 READ32(ace->flag);
310 READ32(ace->access_mask);
311 READ32(dummy32);
312 READ_BUF(dummy32);
313 len += XDR_QUADLEN(dummy32) << 2;
314 READMEM(buf, dummy32);
315 ace->whotype = nfs4_acl_get_whotype(buf, dummy32);
316 status = nfs_ok;
317 if (ace->whotype != NFS4_ACL_WHO_NAMED)
318 ;
319 else if (ace->flag & NFS4_ACE_IDENTIFIER_GROUP)
320 status = nfsd_map_name_to_gid(argp->rqstp,
321 buf, dummy32, &ace->who_gid);
322 else
323 status = nfsd_map_name_to_uid(argp->rqstp,
324 buf, dummy32, &ace->who_uid);
325 if (status)
326 return status;
327 }
328 } else
329 *acl = NULL;
330 if (bmval[1] & FATTR4_WORD1_MODE) {
331 READ_BUF(4);
332 len += 4;
333 READ32(iattr->ia_mode);
334 iattr->ia_mode &= (S_IFMT | S_IALLUGO);
335 iattr->ia_valid |= ATTR_MODE;
336 }
337 if (bmval[1] & FATTR4_WORD1_OWNER) {
338 READ_BUF(4);
339 len += 4;
340 READ32(dummy32);
341 READ_BUF(dummy32);
342 len += (XDR_QUADLEN(dummy32) << 2);
343 READMEM(buf, dummy32);
344 if ((status = nfsd_map_name_to_uid(argp->rqstp, buf, dummy32, &iattr->ia_uid)))
345 return status;
346 iattr->ia_valid |= ATTR_UID;
347 }
348 if (bmval[1] & FATTR4_WORD1_OWNER_GROUP) {
349 READ_BUF(4);
350 len += 4;
351 READ32(dummy32);
352 READ_BUF(dummy32);
353 len += (XDR_QUADLEN(dummy32) << 2);
354 READMEM(buf, dummy32);
355 if ((status = nfsd_map_name_to_gid(argp->rqstp, buf, dummy32, &iattr->ia_gid)))
356 return status;
357 iattr->ia_valid |= ATTR_GID;
358 }
359 if (bmval[1] & FATTR4_WORD1_TIME_ACCESS_SET) {
360 READ_BUF(4);
361 len += 4;
362 READ32(dummy32);
363 switch (dummy32) {
364 case NFS4_SET_TO_CLIENT_TIME:
365 /* We require the high 32 bits of 'seconds' to be 0, and we ignore
366 all 32 bits of 'nseconds'. */
367 READ_BUF(12);
368 len += 12;
369 READ64(iattr->ia_atime.tv_sec);
370 READ32(iattr->ia_atime.tv_nsec);
371 if (iattr->ia_atime.tv_nsec >= (u32)1000000000)
372 return nfserr_inval;
373 iattr->ia_valid |= (ATTR_ATIME | ATTR_ATIME_SET);
374 break;
375 case NFS4_SET_TO_SERVER_TIME:
376 iattr->ia_valid |= ATTR_ATIME;
377 break;
378 default:
379 goto xdr_error;
380 }
381 }
382 if (bmval[1] & FATTR4_WORD1_TIME_MODIFY_SET) {
383 READ_BUF(4);
384 len += 4;
385 READ32(dummy32);
386 switch (dummy32) {
387 case NFS4_SET_TO_CLIENT_TIME:
388 /* We require the high 32 bits of 'seconds' to be 0, and we ignore
389 all 32 bits of 'nseconds'. */
390 READ_BUF(12);
391 len += 12;
392 READ64(iattr->ia_mtime.tv_sec);
393 READ32(iattr->ia_mtime.tv_nsec);
394 if (iattr->ia_mtime.tv_nsec >= (u32)1000000000)
395 return nfserr_inval;
396 iattr->ia_valid |= (ATTR_MTIME | ATTR_MTIME_SET);
397 break;
398 case NFS4_SET_TO_SERVER_TIME:
399 iattr->ia_valid |= ATTR_MTIME;
400 break;
401 default:
402 goto xdr_error;
403 }
404 }
405
406 label->len = 0;
407 #ifdef CONFIG_NFSD_V4_SECURITY_LABEL
408 if (bmval[2] & FATTR4_WORD2_SECURITY_LABEL) {
409 READ_BUF(4);
410 len += 4;
411 READ32(dummy32); /* lfs: we don't use it */
412 READ_BUF(4);
413 len += 4;
414 READ32(dummy32); /* pi: we don't use it either */
415 READ_BUF(4);
416 len += 4;
417 READ32(dummy32);
418 READ_BUF(dummy32);
419 if (dummy32 > NFSD4_MAX_SEC_LABEL_LEN)
420 return nfserr_badlabel;
421 len += (XDR_QUADLEN(dummy32) << 2);
422 READMEM(buf, dummy32);
423 label->data = kzalloc(dummy32 + 1, GFP_KERNEL);
424 if (!label->data)
425 return nfserr_jukebox;
426 label->len = dummy32;
427 defer_free(argp, kfree, label->data);
428 memcpy(label->data, buf, dummy32);
429 }
430 #endif
431
432 if (bmval[0] & ~NFSD_WRITEABLE_ATTRS_WORD0
433 || bmval[1] & ~NFSD_WRITEABLE_ATTRS_WORD1
434 || bmval[2] & ~NFSD_WRITEABLE_ATTRS_WORD2)
435 READ_BUF(expected_len - len);
436 else if (len != expected_len)
437 goto xdr_error;
438
439 DECODE_TAIL;
440 }
441
442 static __be32
443 nfsd4_decode_stateid(struct nfsd4_compoundargs *argp, stateid_t *sid)
444 {
445 DECODE_HEAD;
446
447 READ_BUF(sizeof(stateid_t));
448 READ32(sid->si_generation);
449 COPYMEM(&sid->si_opaque, sizeof(stateid_opaque_t));
450
451 DECODE_TAIL;
452 }
453
454 static __be32
455 nfsd4_decode_access(struct nfsd4_compoundargs *argp, struct nfsd4_access *access)
456 {
457 DECODE_HEAD;
458
459 READ_BUF(4);
460 READ32(access->ac_req_access);
461
462 DECODE_TAIL;
463 }
464
465 static __be32 nfsd4_decode_cb_sec(struct nfsd4_compoundargs *argp, struct nfsd4_cb_sec *cbs)
466 {
467 DECODE_HEAD;
468 u32 dummy, uid, gid;
469 char *machine_name;
470 int i;
471 int nr_secflavs;
472
473 /* callback_sec_params4 */
474 READ_BUF(4);
475 READ32(nr_secflavs);
476 if (nr_secflavs)
477 cbs->flavor = (u32)(-1);
478 else
479 /* Is this legal? Be generous, take it to mean AUTH_NONE: */
480 cbs->flavor = 0;
481 for (i = 0; i < nr_secflavs; ++i) {
482 READ_BUF(4);
483 READ32(dummy);
484 switch (dummy) {
485 case RPC_AUTH_NULL:
486 /* Nothing to read */
487 if (cbs->flavor == (u32)(-1))
488 cbs->flavor = RPC_AUTH_NULL;
489 break;
490 case RPC_AUTH_UNIX:
491 READ_BUF(8);
492 /* stamp */
493 READ32(dummy);
494
495 /* machine name */
496 READ32(dummy);
497 READ_BUF(dummy);
498 SAVEMEM(machine_name, dummy);
499
500 /* uid, gid */
501 READ_BUF(8);
502 READ32(uid);
503 READ32(gid);
504
505 /* more gids */
506 READ_BUF(4);
507 READ32(dummy);
508 READ_BUF(dummy * 4);
509 if (cbs->flavor == (u32)(-1)) {
510 kuid_t kuid = make_kuid(&init_user_ns, uid);
511 kgid_t kgid = make_kgid(&init_user_ns, gid);
512 if (uid_valid(kuid) && gid_valid(kgid)) {
513 cbs->uid = kuid;
514 cbs->gid = kgid;
515 cbs->flavor = RPC_AUTH_UNIX;
516 } else {
517 dprintk("RPC_AUTH_UNIX with invalid"
518 "uid or gid ignoring!\n");
519 }
520 }
521 break;
522 case RPC_AUTH_GSS:
523 dprintk("RPC_AUTH_GSS callback secflavor "
524 "not supported!\n");
525 READ_BUF(8);
526 /* gcbp_service */
527 READ32(dummy);
528 /* gcbp_handle_from_server */
529 READ32(dummy);
530 READ_BUF(dummy);
531 p += XDR_QUADLEN(dummy);
532 /* gcbp_handle_from_client */
533 READ_BUF(4);
534 READ32(dummy);
535 READ_BUF(dummy);
536 break;
537 default:
538 dprintk("Illegal callback secflavor\n");
539 return nfserr_inval;
540 }
541 }
542 DECODE_TAIL;
543 }
544
545 static __be32 nfsd4_decode_backchannel_ctl(struct nfsd4_compoundargs *argp, struct nfsd4_backchannel_ctl *bc)
546 {
547 DECODE_HEAD;
548
549 READ_BUF(4);
550 READ32(bc->bc_cb_program);
551 nfsd4_decode_cb_sec(argp, &bc->bc_cb_sec);
552
553 DECODE_TAIL;
554 }
555
556 static __be32 nfsd4_decode_bind_conn_to_session(struct nfsd4_compoundargs *argp, struct nfsd4_bind_conn_to_session *bcts)
557 {
558 DECODE_HEAD;
559
560 READ_BUF(NFS4_MAX_SESSIONID_LEN + 8);
561 COPYMEM(bcts->sessionid.data, NFS4_MAX_SESSIONID_LEN);
562 READ32(bcts->dir);
563 /* XXX: skipping ctsa_use_conn_in_rdma_mode. Perhaps Tom Tucker
564 * could help us figure out we should be using it. */
565 DECODE_TAIL;
566 }
567
568 static __be32
569 nfsd4_decode_close(struct nfsd4_compoundargs *argp, struct nfsd4_close *close)
570 {
571 DECODE_HEAD;
572
573 READ_BUF(4);
574 READ32(close->cl_seqid);
575 return nfsd4_decode_stateid(argp, &close->cl_stateid);
576
577 DECODE_TAIL;
578 }
579
580
581 static __be32
582 nfsd4_decode_commit(struct nfsd4_compoundargs *argp, struct nfsd4_commit *commit)
583 {
584 DECODE_HEAD;
585
586 READ_BUF(12);
587 READ64(commit->co_offset);
588 READ32(commit->co_count);
589
590 DECODE_TAIL;
591 }
592
593 static __be32
594 nfsd4_decode_create(struct nfsd4_compoundargs *argp, struct nfsd4_create *create)
595 {
596 DECODE_HEAD;
597
598 READ_BUF(4);
599 READ32(create->cr_type);
600 switch (create->cr_type) {
601 case NF4LNK:
602 READ_BUF(4);
603 READ32(create->cr_linklen);
604 READ_BUF(create->cr_linklen);
605 SAVEMEM(create->cr_linkname, create->cr_linklen);
606 break;
607 case NF4BLK:
608 case NF4CHR:
609 READ_BUF(8);
610 READ32(create->cr_specdata1);
611 READ32(create->cr_specdata2);
612 break;
613 case NF4SOCK:
614 case NF4FIFO:
615 case NF4DIR:
616 default:
617 break;
618 }
619
620 READ_BUF(4);
621 READ32(create->cr_namelen);
622 READ_BUF(create->cr_namelen);
623 SAVEMEM(create->cr_name, create->cr_namelen);
624 if ((status = check_filename(create->cr_name, create->cr_namelen)))
625 return status;
626
627 status = nfsd4_decode_fattr(argp, create->cr_bmval, &create->cr_iattr,
628 &create->cr_acl, &create->cr_label);
629 if (status)
630 goto out;
631
632 DECODE_TAIL;
633 }
634
635 static inline __be32
636 nfsd4_decode_delegreturn(struct nfsd4_compoundargs *argp, struct nfsd4_delegreturn *dr)
637 {
638 return nfsd4_decode_stateid(argp, &dr->dr_stateid);
639 }
640
641 static inline __be32
642 nfsd4_decode_getattr(struct nfsd4_compoundargs *argp, struct nfsd4_getattr *getattr)
643 {
644 return nfsd4_decode_bitmap(argp, getattr->ga_bmval);
645 }
646
647 static __be32
648 nfsd4_decode_link(struct nfsd4_compoundargs *argp, struct nfsd4_link *link)
649 {
650 DECODE_HEAD;
651
652 READ_BUF(4);
653 READ32(link->li_namelen);
654 READ_BUF(link->li_namelen);
655 SAVEMEM(link->li_name, link->li_namelen);
656 if ((status = check_filename(link->li_name, link->li_namelen)))
657 return status;
658
659 DECODE_TAIL;
660 }
661
662 static __be32
663 nfsd4_decode_lock(struct nfsd4_compoundargs *argp, struct nfsd4_lock *lock)
664 {
665 DECODE_HEAD;
666
667 /*
668 * type, reclaim(boolean), offset, length, new_lock_owner(boolean)
669 */
670 READ_BUF(28);
671 READ32(lock->lk_type);
672 if ((lock->lk_type < NFS4_READ_LT) || (lock->lk_type > NFS4_WRITEW_LT))
673 goto xdr_error;
674 READ32(lock->lk_reclaim);
675 READ64(lock->lk_offset);
676 READ64(lock->lk_length);
677 READ32(lock->lk_is_new);
678
679 if (lock->lk_is_new) {
680 READ_BUF(4);
681 READ32(lock->lk_new_open_seqid);
682 status = nfsd4_decode_stateid(argp, &lock->lk_new_open_stateid);
683 if (status)
684 return status;
685 READ_BUF(8 + sizeof(clientid_t));
686 READ32(lock->lk_new_lock_seqid);
687 COPYMEM(&lock->lk_new_clientid, sizeof(clientid_t));
688 READ32(lock->lk_new_owner.len);
689 READ_BUF(lock->lk_new_owner.len);
690 READMEM(lock->lk_new_owner.data, lock->lk_new_owner.len);
691 } else {
692 status = nfsd4_decode_stateid(argp, &lock->lk_old_lock_stateid);
693 if (status)
694 return status;
695 READ_BUF(4);
696 READ32(lock->lk_old_lock_seqid);
697 }
698
699 DECODE_TAIL;
700 }
701
702 static __be32
703 nfsd4_decode_lockt(struct nfsd4_compoundargs *argp, struct nfsd4_lockt *lockt)
704 {
705 DECODE_HEAD;
706
707 READ_BUF(32);
708 READ32(lockt->lt_type);
709 if((lockt->lt_type < NFS4_READ_LT) || (lockt->lt_type > NFS4_WRITEW_LT))
710 goto xdr_error;
711 READ64(lockt->lt_offset);
712 READ64(lockt->lt_length);
713 COPYMEM(&lockt->lt_clientid, 8);
714 READ32(lockt->lt_owner.len);
715 READ_BUF(lockt->lt_owner.len);
716 READMEM(lockt->lt_owner.data, lockt->lt_owner.len);
717
718 DECODE_TAIL;
719 }
720
721 static __be32
722 nfsd4_decode_locku(struct nfsd4_compoundargs *argp, struct nfsd4_locku *locku)
723 {
724 DECODE_HEAD;
725
726 READ_BUF(8);
727 READ32(locku->lu_type);
728 if ((locku->lu_type < NFS4_READ_LT) || (locku->lu_type > NFS4_WRITEW_LT))
729 goto xdr_error;
730 READ32(locku->lu_seqid);
731 status = nfsd4_decode_stateid(argp, &locku->lu_stateid);
732 if (status)
733 return status;
734 READ_BUF(16);
735 READ64(locku->lu_offset);
736 READ64(locku->lu_length);
737
738 DECODE_TAIL;
739 }
740
741 static __be32
742 nfsd4_decode_lookup(struct nfsd4_compoundargs *argp, struct nfsd4_lookup *lookup)
743 {
744 DECODE_HEAD;
745
746 READ_BUF(4);
747 READ32(lookup->lo_len);
748 READ_BUF(lookup->lo_len);
749 SAVEMEM(lookup->lo_name, lookup->lo_len);
750 if ((status = check_filename(lookup->lo_name, lookup->lo_len)))
751 return status;
752
753 DECODE_TAIL;
754 }
755
756 static __be32 nfsd4_decode_share_access(struct nfsd4_compoundargs *argp, u32 *share_access, u32 *deleg_want, u32 *deleg_when)
757 {
758 __be32 *p;
759 u32 w;
760
761 READ_BUF(4);
762 READ32(w);
763 *share_access = w & NFS4_SHARE_ACCESS_MASK;
764 *deleg_want = w & NFS4_SHARE_WANT_MASK;
765 if (deleg_when)
766 *deleg_when = w & NFS4_SHARE_WHEN_MASK;
767
768 switch (w & NFS4_SHARE_ACCESS_MASK) {
769 case NFS4_SHARE_ACCESS_READ:
770 case NFS4_SHARE_ACCESS_WRITE:
771 case NFS4_SHARE_ACCESS_BOTH:
772 break;
773 default:
774 return nfserr_bad_xdr;
775 }
776 w &= ~NFS4_SHARE_ACCESS_MASK;
777 if (!w)
778 return nfs_ok;
779 if (!argp->minorversion)
780 return nfserr_bad_xdr;
781 switch (w & NFS4_SHARE_WANT_MASK) {
782 case NFS4_SHARE_WANT_NO_PREFERENCE:
783 case NFS4_SHARE_WANT_READ_DELEG:
784 case NFS4_SHARE_WANT_WRITE_DELEG:
785 case NFS4_SHARE_WANT_ANY_DELEG:
786 case NFS4_SHARE_WANT_NO_DELEG:
787 case NFS4_SHARE_WANT_CANCEL:
788 break;
789 default:
790 return nfserr_bad_xdr;
791 }
792 w &= ~NFS4_SHARE_WANT_MASK;
793 if (!w)
794 return nfs_ok;
795
796 if (!deleg_when) /* open_downgrade */
797 return nfserr_inval;
798 switch (w) {
799 case NFS4_SHARE_SIGNAL_DELEG_WHEN_RESRC_AVAIL:
800 case NFS4_SHARE_PUSH_DELEG_WHEN_UNCONTENDED:
801 case (NFS4_SHARE_SIGNAL_DELEG_WHEN_RESRC_AVAIL |
802 NFS4_SHARE_PUSH_DELEG_WHEN_UNCONTENDED):
803 return nfs_ok;
804 }
805 xdr_error:
806 return nfserr_bad_xdr;
807 }
808
809 static __be32 nfsd4_decode_share_deny(struct nfsd4_compoundargs *argp, u32 *x)
810 {
811 __be32 *p;
812
813 READ_BUF(4);
814 READ32(*x);
815 /* Note: unlinke access bits, deny bits may be zero. */
816 if (*x & ~NFS4_SHARE_DENY_BOTH)
817 return nfserr_bad_xdr;
818 return nfs_ok;
819 xdr_error:
820 return nfserr_bad_xdr;
821 }
822
823 static __be32 nfsd4_decode_opaque(struct nfsd4_compoundargs *argp, struct xdr_netobj *o)
824 {
825 __be32 *p;
826
827 READ_BUF(4);
828 READ32(o->len);
829
830 if (o->len == 0 || o->len > NFS4_OPAQUE_LIMIT)
831 return nfserr_bad_xdr;
832
833 READ_BUF(o->len);
834 SAVEMEM(o->data, o->len);
835 return nfs_ok;
836 xdr_error:
837 return nfserr_bad_xdr;
838 }
839
840 static __be32
841 nfsd4_decode_open(struct nfsd4_compoundargs *argp, struct nfsd4_open *open)
842 {
843 DECODE_HEAD;
844 u32 dummy;
845
846 memset(open->op_bmval, 0, sizeof(open->op_bmval));
847 open->op_iattr.ia_valid = 0;
848 open->op_openowner = NULL;
849
850 open->op_xdr_error = 0;
851 /* seqid, share_access, share_deny, clientid, ownerlen */
852 READ_BUF(4);
853 READ32(open->op_seqid);
854 /* decode, yet ignore deleg_when until supported */
855 status = nfsd4_decode_share_access(argp, &open->op_share_access,
856 &open->op_deleg_want, &dummy);
857 if (status)
858 goto xdr_error;
859 status = nfsd4_decode_share_deny(argp, &open->op_share_deny);
860 if (status)
861 goto xdr_error;
862 READ_BUF(sizeof(clientid_t));
863 COPYMEM(&open->op_clientid, sizeof(clientid_t));
864 status = nfsd4_decode_opaque(argp, &open->op_owner);
865 if (status)
866 goto xdr_error;
867 READ_BUF(4);
868 READ32(open->op_create);
869 switch (open->op_create) {
870 case NFS4_OPEN_NOCREATE:
871 break;
872 case NFS4_OPEN_CREATE:
873 READ_BUF(4);
874 READ32(open->op_createmode);
875 switch (open->op_createmode) {
876 case NFS4_CREATE_UNCHECKED:
877 case NFS4_CREATE_GUARDED:
878 status = nfsd4_decode_fattr(argp, open->op_bmval,
879 &open->op_iattr, &open->op_acl, &open->op_label);
880 if (status)
881 goto out;
882 break;
883 case NFS4_CREATE_EXCLUSIVE:
884 READ_BUF(NFS4_VERIFIER_SIZE);
885 COPYMEM(open->op_verf.data, NFS4_VERIFIER_SIZE);
886 break;
887 case NFS4_CREATE_EXCLUSIVE4_1:
888 if (argp->minorversion < 1)
889 goto xdr_error;
890 READ_BUF(NFS4_VERIFIER_SIZE);
891 COPYMEM(open->op_verf.data, NFS4_VERIFIER_SIZE);
892 status = nfsd4_decode_fattr(argp, open->op_bmval,
893 &open->op_iattr, &open->op_acl, &open->op_label);
894 if (status)
895 goto out;
896 break;
897 default:
898 goto xdr_error;
899 }
900 break;
901 default:
902 goto xdr_error;
903 }
904
905 /* open_claim */
906 READ_BUF(4);
907 READ32(open->op_claim_type);
908 switch (open->op_claim_type) {
909 case NFS4_OPEN_CLAIM_NULL:
910 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
911 READ_BUF(4);
912 READ32(open->op_fname.len);
913 READ_BUF(open->op_fname.len);
914 SAVEMEM(open->op_fname.data, open->op_fname.len);
915 if ((status = check_filename(open->op_fname.data, open->op_fname.len)))
916 return status;
917 break;
918 case NFS4_OPEN_CLAIM_PREVIOUS:
919 READ_BUF(4);
920 READ32(open->op_delegate_type);
921 break;
922 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
923 status = nfsd4_decode_stateid(argp, &open->op_delegate_stateid);
924 if (status)
925 return status;
926 READ_BUF(4);
927 READ32(open->op_fname.len);
928 READ_BUF(open->op_fname.len);
929 SAVEMEM(open->op_fname.data, open->op_fname.len);
930 if ((status = check_filename(open->op_fname.data, open->op_fname.len)))
931 return status;
932 break;
933 case NFS4_OPEN_CLAIM_FH:
934 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
935 if (argp->minorversion < 1)
936 goto xdr_error;
937 /* void */
938 break;
939 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
940 if (argp->minorversion < 1)
941 goto xdr_error;
942 status = nfsd4_decode_stateid(argp, &open->op_delegate_stateid);
943 if (status)
944 return status;
945 break;
946 default:
947 goto xdr_error;
948 }
949
950 DECODE_TAIL;
951 }
952
953 static __be32
954 nfsd4_decode_open_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_open_confirm *open_conf)
955 {
956 DECODE_HEAD;
957
958 if (argp->minorversion >= 1)
959 return nfserr_notsupp;
960
961 status = nfsd4_decode_stateid(argp, &open_conf->oc_req_stateid);
962 if (status)
963 return status;
964 READ_BUF(4);
965 READ32(open_conf->oc_seqid);
966
967 DECODE_TAIL;
968 }
969
970 static __be32
971 nfsd4_decode_open_downgrade(struct nfsd4_compoundargs *argp, struct nfsd4_open_downgrade *open_down)
972 {
973 DECODE_HEAD;
974
975 status = nfsd4_decode_stateid(argp, &open_down->od_stateid);
976 if (status)
977 return status;
978 READ_BUF(4);
979 READ32(open_down->od_seqid);
980 status = nfsd4_decode_share_access(argp, &open_down->od_share_access,
981 &open_down->od_deleg_want, NULL);
982 if (status)
983 return status;
984 status = nfsd4_decode_share_deny(argp, &open_down->od_share_deny);
985 if (status)
986 return status;
987 DECODE_TAIL;
988 }
989
990 static __be32
991 nfsd4_decode_putfh(struct nfsd4_compoundargs *argp, struct nfsd4_putfh *putfh)
992 {
993 DECODE_HEAD;
994
995 READ_BUF(4);
996 READ32(putfh->pf_fhlen);
997 if (putfh->pf_fhlen > NFS4_FHSIZE)
998 goto xdr_error;
999 READ_BUF(putfh->pf_fhlen);
1000 SAVEMEM(putfh->pf_fhval, putfh->pf_fhlen);
1001
1002 DECODE_TAIL;
1003 }
1004
1005 static __be32
1006 nfsd4_decode_putpubfh(struct nfsd4_compoundargs *argp, void *p)
1007 {
1008 if (argp->minorversion == 0)
1009 return nfs_ok;
1010 return nfserr_notsupp;
1011 }
1012
1013 static __be32
1014 nfsd4_decode_read(struct nfsd4_compoundargs *argp, struct nfsd4_read *read)
1015 {
1016 DECODE_HEAD;
1017
1018 status = nfsd4_decode_stateid(argp, &read->rd_stateid);
1019 if (status)
1020 return status;
1021 READ_BUF(12);
1022 READ64(read->rd_offset);
1023 READ32(read->rd_length);
1024
1025 DECODE_TAIL;
1026 }
1027
1028 static __be32
1029 nfsd4_decode_readdir(struct nfsd4_compoundargs *argp, struct nfsd4_readdir *readdir)
1030 {
1031 DECODE_HEAD;
1032
1033 READ_BUF(24);
1034 READ64(readdir->rd_cookie);
1035 COPYMEM(readdir->rd_verf.data, sizeof(readdir->rd_verf.data));
1036 READ32(readdir->rd_dircount); /* just in case you needed a useless field... */
1037 READ32(readdir->rd_maxcount);
1038 if ((status = nfsd4_decode_bitmap(argp, readdir->rd_bmval)))
1039 goto out;
1040
1041 DECODE_TAIL;
1042 }
1043
1044 static __be32
1045 nfsd4_decode_remove(struct nfsd4_compoundargs *argp, struct nfsd4_remove *remove)
1046 {
1047 DECODE_HEAD;
1048
1049 READ_BUF(4);
1050 READ32(remove->rm_namelen);
1051 READ_BUF(remove->rm_namelen);
1052 SAVEMEM(remove->rm_name, remove->rm_namelen);
1053 if ((status = check_filename(remove->rm_name, remove->rm_namelen)))
1054 return status;
1055
1056 DECODE_TAIL;
1057 }
1058
1059 static __be32
1060 nfsd4_decode_rename(struct nfsd4_compoundargs *argp, struct nfsd4_rename *rename)
1061 {
1062 DECODE_HEAD;
1063
1064 READ_BUF(4);
1065 READ32(rename->rn_snamelen);
1066 READ_BUF(rename->rn_snamelen + 4);
1067 SAVEMEM(rename->rn_sname, rename->rn_snamelen);
1068 READ32(rename->rn_tnamelen);
1069 READ_BUF(rename->rn_tnamelen);
1070 SAVEMEM(rename->rn_tname, rename->rn_tnamelen);
1071 if ((status = check_filename(rename->rn_sname, rename->rn_snamelen)))
1072 return status;
1073 if ((status = check_filename(rename->rn_tname, rename->rn_tnamelen)))
1074 return status;
1075
1076 DECODE_TAIL;
1077 }
1078
1079 static __be32
1080 nfsd4_decode_renew(struct nfsd4_compoundargs *argp, clientid_t *clientid)
1081 {
1082 DECODE_HEAD;
1083
1084 if (argp->minorversion >= 1)
1085 return nfserr_notsupp;
1086
1087 READ_BUF(sizeof(clientid_t));
1088 COPYMEM(clientid, sizeof(clientid_t));
1089
1090 DECODE_TAIL;
1091 }
1092
1093 static __be32
1094 nfsd4_decode_secinfo(struct nfsd4_compoundargs *argp,
1095 struct nfsd4_secinfo *secinfo)
1096 {
1097 DECODE_HEAD;
1098
1099 READ_BUF(4);
1100 READ32(secinfo->si_namelen);
1101 READ_BUF(secinfo->si_namelen);
1102 SAVEMEM(secinfo->si_name, secinfo->si_namelen);
1103 status = check_filename(secinfo->si_name, secinfo->si_namelen);
1104 if (status)
1105 return status;
1106 DECODE_TAIL;
1107 }
1108
1109 static __be32
1110 nfsd4_decode_secinfo_no_name(struct nfsd4_compoundargs *argp,
1111 struct nfsd4_secinfo_no_name *sin)
1112 {
1113 DECODE_HEAD;
1114
1115 READ_BUF(4);
1116 READ32(sin->sin_style);
1117 DECODE_TAIL;
1118 }
1119
1120 static __be32
1121 nfsd4_decode_setattr(struct nfsd4_compoundargs *argp, struct nfsd4_setattr *setattr)
1122 {
1123 __be32 status;
1124
1125 status = nfsd4_decode_stateid(argp, &setattr->sa_stateid);
1126 if (status)
1127 return status;
1128 return nfsd4_decode_fattr(argp, setattr->sa_bmval, &setattr->sa_iattr,
1129 &setattr->sa_acl, &setattr->sa_label);
1130 }
1131
1132 static __be32
1133 nfsd4_decode_setclientid(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid *setclientid)
1134 {
1135 DECODE_HEAD;
1136
1137 if (argp->minorversion >= 1)
1138 return nfserr_notsupp;
1139
1140 READ_BUF(NFS4_VERIFIER_SIZE);
1141 COPYMEM(setclientid->se_verf.data, NFS4_VERIFIER_SIZE);
1142
1143 status = nfsd4_decode_opaque(argp, &setclientid->se_name);
1144 if (status)
1145 return nfserr_bad_xdr;
1146 READ_BUF(8);
1147 READ32(setclientid->se_callback_prog);
1148 READ32(setclientid->se_callback_netid_len);
1149
1150 READ_BUF(setclientid->se_callback_netid_len + 4);
1151 SAVEMEM(setclientid->se_callback_netid_val, setclientid->se_callback_netid_len);
1152 READ32(setclientid->se_callback_addr_len);
1153
1154 READ_BUF(setclientid->se_callback_addr_len + 4);
1155 SAVEMEM(setclientid->se_callback_addr_val, setclientid->se_callback_addr_len);
1156 READ32(setclientid->se_callback_ident);
1157
1158 DECODE_TAIL;
1159 }
1160
1161 static __be32
1162 nfsd4_decode_setclientid_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid_confirm *scd_c)
1163 {
1164 DECODE_HEAD;
1165
1166 if (argp->minorversion >= 1)
1167 return nfserr_notsupp;
1168
1169 READ_BUF(8 + NFS4_VERIFIER_SIZE);
1170 COPYMEM(&scd_c->sc_clientid, 8);
1171 COPYMEM(&scd_c->sc_confirm, NFS4_VERIFIER_SIZE);
1172
1173 DECODE_TAIL;
1174 }
1175
1176 /* Also used for NVERIFY */
1177 static __be32
1178 nfsd4_decode_verify(struct nfsd4_compoundargs *argp, struct nfsd4_verify *verify)
1179 {
1180 DECODE_HEAD;
1181
1182 if ((status = nfsd4_decode_bitmap(argp, verify->ve_bmval)))
1183 goto out;
1184
1185 /* For convenience's sake, we compare raw xdr'd attributes in
1186 * nfsd4_proc_verify */
1187
1188 READ_BUF(4);
1189 READ32(verify->ve_attrlen);
1190 READ_BUF(verify->ve_attrlen);
1191 SAVEMEM(verify->ve_attrval, verify->ve_attrlen);
1192
1193 DECODE_TAIL;
1194 }
1195
1196 static __be32
1197 nfsd4_decode_write(struct nfsd4_compoundargs *argp, struct nfsd4_write *write)
1198 {
1199 int avail;
1200 int len;
1201 DECODE_HEAD;
1202
1203 status = nfsd4_decode_stateid(argp, &write->wr_stateid);
1204 if (status)
1205 return status;
1206 READ_BUF(16);
1207 READ64(write->wr_offset);
1208 READ32(write->wr_stable_how);
1209 if (write->wr_stable_how > 2)
1210 goto xdr_error;
1211 READ32(write->wr_buflen);
1212
1213 /* Sorry .. no magic macros for this.. *
1214 * READ_BUF(write->wr_buflen);
1215 * SAVEMEM(write->wr_buf, write->wr_buflen);
1216 */
1217 avail = (char*)argp->end - (char*)argp->p;
1218 if (avail + argp->pagelen < write->wr_buflen) {
1219 dprintk("NFSD: xdr error (%s:%d)\n",
1220 __FILE__, __LINE__);
1221 goto xdr_error;
1222 }
1223 write->wr_head.iov_base = p;
1224 write->wr_head.iov_len = avail;
1225 write->wr_pagelist = argp->pagelist;
1226
1227 len = XDR_QUADLEN(write->wr_buflen) << 2;
1228 if (len >= avail) {
1229 int pages;
1230
1231 len -= avail;
1232
1233 pages = len >> PAGE_SHIFT;
1234 argp->pagelist += pages;
1235 argp->pagelen -= pages * PAGE_SIZE;
1236 len -= pages * PAGE_SIZE;
1237
1238 argp->p = (__be32 *)page_address(argp->pagelist[0]);
1239 argp->pagelist++;
1240 argp->end = argp->p + XDR_QUADLEN(PAGE_SIZE);
1241 }
1242 argp->p += XDR_QUADLEN(len);
1243
1244 DECODE_TAIL;
1245 }
1246
1247 static __be32
1248 nfsd4_decode_release_lockowner(struct nfsd4_compoundargs *argp, struct nfsd4_release_lockowner *rlockowner)
1249 {
1250 DECODE_HEAD;
1251
1252 if (argp->minorversion >= 1)
1253 return nfserr_notsupp;
1254
1255 READ_BUF(12);
1256 COPYMEM(&rlockowner->rl_clientid, sizeof(clientid_t));
1257 READ32(rlockowner->rl_owner.len);
1258 READ_BUF(rlockowner->rl_owner.len);
1259 READMEM(rlockowner->rl_owner.data, rlockowner->rl_owner.len);
1260
1261 if (argp->minorversion && !zero_clientid(&rlockowner->rl_clientid))
1262 return nfserr_inval;
1263 DECODE_TAIL;
1264 }
1265
1266 static __be32
1267 nfsd4_decode_exchange_id(struct nfsd4_compoundargs *argp,
1268 struct nfsd4_exchange_id *exid)
1269 {
1270 int dummy, tmp;
1271 DECODE_HEAD;
1272
1273 READ_BUF(NFS4_VERIFIER_SIZE);
1274 COPYMEM(exid->verifier.data, NFS4_VERIFIER_SIZE);
1275
1276 status = nfsd4_decode_opaque(argp, &exid->clname);
1277 if (status)
1278 return nfserr_bad_xdr;
1279
1280 READ_BUF(4);
1281 READ32(exid->flags);
1282
1283 /* Ignore state_protect4_a */
1284 READ_BUF(4);
1285 READ32(exid->spa_how);
1286 switch (exid->spa_how) {
1287 case SP4_NONE:
1288 break;
1289 case SP4_MACH_CRED:
1290 /* spo_must_enforce */
1291 READ_BUF(4);
1292 READ32(dummy);
1293 READ_BUF(dummy * 4);
1294 p += dummy;
1295
1296 /* spo_must_allow */
1297 READ_BUF(4);
1298 READ32(dummy);
1299 READ_BUF(dummy * 4);
1300 p += dummy;
1301 break;
1302 case SP4_SSV:
1303 /* ssp_ops */
1304 READ_BUF(4);
1305 READ32(dummy);
1306 READ_BUF(dummy * 4);
1307 p += dummy;
1308
1309 READ_BUF(4);
1310 READ32(dummy);
1311 READ_BUF(dummy * 4);
1312 p += dummy;
1313
1314 /* ssp_hash_algs<> */
1315 READ_BUF(4);
1316 READ32(tmp);
1317 while (tmp--) {
1318 READ_BUF(4);
1319 READ32(dummy);
1320 READ_BUF(dummy);
1321 p += XDR_QUADLEN(dummy);
1322 }
1323
1324 /* ssp_encr_algs<> */
1325 READ_BUF(4);
1326 READ32(tmp);
1327 while (tmp--) {
1328 READ_BUF(4);
1329 READ32(dummy);
1330 READ_BUF(dummy);
1331 p += XDR_QUADLEN(dummy);
1332 }
1333
1334 /* ssp_window and ssp_num_gss_handles */
1335 READ_BUF(8);
1336 READ32(dummy);
1337 READ32(dummy);
1338 break;
1339 default:
1340 goto xdr_error;
1341 }
1342
1343 /* Ignore Implementation ID */
1344 READ_BUF(4); /* nfs_impl_id4 array length */
1345 READ32(dummy);
1346
1347 if (dummy > 1)
1348 goto xdr_error;
1349
1350 if (dummy == 1) {
1351 /* nii_domain */
1352 READ_BUF(4);
1353 READ32(dummy);
1354 READ_BUF(dummy);
1355 p += XDR_QUADLEN(dummy);
1356
1357 /* nii_name */
1358 READ_BUF(4);
1359 READ32(dummy);
1360 READ_BUF(dummy);
1361 p += XDR_QUADLEN(dummy);
1362
1363 /* nii_date */
1364 READ_BUF(12);
1365 p += 3;
1366 }
1367 DECODE_TAIL;
1368 }
1369
1370 static __be32
1371 nfsd4_decode_create_session(struct nfsd4_compoundargs *argp,
1372 struct nfsd4_create_session *sess)
1373 {
1374 DECODE_HEAD;
1375 u32 dummy;
1376
1377 READ_BUF(16);
1378 COPYMEM(&sess->clientid, 8);
1379 READ32(sess->seqid);
1380 READ32(sess->flags);
1381
1382 /* Fore channel attrs */
1383 READ_BUF(28);
1384 READ32(dummy); /* headerpadsz is always 0 */
1385 READ32(sess->fore_channel.maxreq_sz);
1386 READ32(sess->fore_channel.maxresp_sz);
1387 READ32(sess->fore_channel.maxresp_cached);
1388 READ32(sess->fore_channel.maxops);
1389 READ32(sess->fore_channel.maxreqs);
1390 READ32(sess->fore_channel.nr_rdma_attrs);
1391 if (sess->fore_channel.nr_rdma_attrs == 1) {
1392 READ_BUF(4);
1393 READ32(sess->fore_channel.rdma_attrs);
1394 } else if (sess->fore_channel.nr_rdma_attrs > 1) {
1395 dprintk("Too many fore channel attr bitmaps!\n");
1396 goto xdr_error;
1397 }
1398
1399 /* Back channel attrs */
1400 READ_BUF(28);
1401 READ32(dummy); /* headerpadsz is always 0 */
1402 READ32(sess->back_channel.maxreq_sz);
1403 READ32(sess->back_channel.maxresp_sz);
1404 READ32(sess->back_channel.maxresp_cached);
1405 READ32(sess->back_channel.maxops);
1406 READ32(sess->back_channel.maxreqs);
1407 READ32(sess->back_channel.nr_rdma_attrs);
1408 if (sess->back_channel.nr_rdma_attrs == 1) {
1409 READ_BUF(4);
1410 READ32(sess->back_channel.rdma_attrs);
1411 } else if (sess->back_channel.nr_rdma_attrs > 1) {
1412 dprintk("Too many back channel attr bitmaps!\n");
1413 goto xdr_error;
1414 }
1415
1416 READ_BUF(4);
1417 READ32(sess->callback_prog);
1418 nfsd4_decode_cb_sec(argp, &sess->cb_sec);
1419 DECODE_TAIL;
1420 }
1421
1422 static __be32
1423 nfsd4_decode_destroy_session(struct nfsd4_compoundargs *argp,
1424 struct nfsd4_destroy_session *destroy_session)
1425 {
1426 DECODE_HEAD;
1427 READ_BUF(NFS4_MAX_SESSIONID_LEN);
1428 COPYMEM(destroy_session->sessionid.data, NFS4_MAX_SESSIONID_LEN);
1429
1430 DECODE_TAIL;
1431 }
1432
1433 static __be32
1434 nfsd4_decode_free_stateid(struct nfsd4_compoundargs *argp,
1435 struct nfsd4_free_stateid *free_stateid)
1436 {
1437 DECODE_HEAD;
1438
1439 READ_BUF(sizeof(stateid_t));
1440 READ32(free_stateid->fr_stateid.si_generation);
1441 COPYMEM(&free_stateid->fr_stateid.si_opaque, sizeof(stateid_opaque_t));
1442
1443 DECODE_TAIL;
1444 }
1445
1446 static __be32
1447 nfsd4_decode_sequence(struct nfsd4_compoundargs *argp,
1448 struct nfsd4_sequence *seq)
1449 {
1450 DECODE_HEAD;
1451
1452 READ_BUF(NFS4_MAX_SESSIONID_LEN + 16);
1453 COPYMEM(seq->sessionid.data, NFS4_MAX_SESSIONID_LEN);
1454 READ32(seq->seqid);
1455 READ32(seq->slotid);
1456 READ32(seq->maxslots);
1457 READ32(seq->cachethis);
1458
1459 DECODE_TAIL;
1460 }
1461
1462 static __be32
1463 nfsd4_decode_test_stateid(struct nfsd4_compoundargs *argp, struct nfsd4_test_stateid *test_stateid)
1464 {
1465 int i;
1466 __be32 *p, status;
1467 struct nfsd4_test_stateid_id *stateid;
1468
1469 READ_BUF(4);
1470 test_stateid->ts_num_ids = ntohl(*p++);
1471
1472 INIT_LIST_HEAD(&test_stateid->ts_stateid_list);
1473
1474 for (i = 0; i < test_stateid->ts_num_ids; i++) {
1475 stateid = kmalloc(sizeof(struct nfsd4_test_stateid_id), GFP_KERNEL);
1476 if (!stateid) {
1477 status = nfserrno(-ENOMEM);
1478 goto out;
1479 }
1480
1481 defer_free(argp, kfree, stateid);
1482 INIT_LIST_HEAD(&stateid->ts_id_list);
1483 list_add_tail(&stateid->ts_id_list, &test_stateid->ts_stateid_list);
1484
1485 status = nfsd4_decode_stateid(argp, &stateid->ts_id_stateid);
1486 if (status)
1487 goto out;
1488 }
1489
1490 status = 0;
1491 out:
1492 return status;
1493 xdr_error:
1494 dprintk("NFSD: xdr error (%s:%d)\n", __FILE__, __LINE__);
1495 status = nfserr_bad_xdr;
1496 goto out;
1497 }
1498
1499 static __be32 nfsd4_decode_destroy_clientid(struct nfsd4_compoundargs *argp, struct nfsd4_destroy_clientid *dc)
1500 {
1501 DECODE_HEAD;
1502
1503 READ_BUF(8);
1504 COPYMEM(&dc->clientid, 8);
1505
1506 DECODE_TAIL;
1507 }
1508
1509 static __be32 nfsd4_decode_reclaim_complete(struct nfsd4_compoundargs *argp, struct nfsd4_reclaim_complete *rc)
1510 {
1511 DECODE_HEAD;
1512
1513 READ_BUF(4);
1514 READ32(rc->rca_one_fs);
1515
1516 DECODE_TAIL;
1517 }
1518
1519 static __be32
1520 nfsd4_decode_noop(struct nfsd4_compoundargs *argp, void *p)
1521 {
1522 return nfs_ok;
1523 }
1524
1525 static __be32
1526 nfsd4_decode_notsupp(struct nfsd4_compoundargs *argp, void *p)
1527 {
1528 return nfserr_notsupp;
1529 }
1530
1531 typedef __be32(*nfsd4_dec)(struct nfsd4_compoundargs *argp, void *);
1532
1533 static nfsd4_dec nfsd4_dec_ops[] = {
1534 [OP_ACCESS] = (nfsd4_dec)nfsd4_decode_access,
1535 [OP_CLOSE] = (nfsd4_dec)nfsd4_decode_close,
1536 [OP_COMMIT] = (nfsd4_dec)nfsd4_decode_commit,
1537 [OP_CREATE] = (nfsd4_dec)nfsd4_decode_create,
1538 [OP_DELEGPURGE] = (nfsd4_dec)nfsd4_decode_notsupp,
1539 [OP_DELEGRETURN] = (nfsd4_dec)nfsd4_decode_delegreturn,
1540 [OP_GETATTR] = (nfsd4_dec)nfsd4_decode_getattr,
1541 [OP_GETFH] = (nfsd4_dec)nfsd4_decode_noop,
1542 [OP_LINK] = (nfsd4_dec)nfsd4_decode_link,
1543 [OP_LOCK] = (nfsd4_dec)nfsd4_decode_lock,
1544 [OP_LOCKT] = (nfsd4_dec)nfsd4_decode_lockt,
1545 [OP_LOCKU] = (nfsd4_dec)nfsd4_decode_locku,
1546 [OP_LOOKUP] = (nfsd4_dec)nfsd4_decode_lookup,
1547 [OP_LOOKUPP] = (nfsd4_dec)nfsd4_decode_noop,
1548 [OP_NVERIFY] = (nfsd4_dec)nfsd4_decode_verify,
1549 [OP_OPEN] = (nfsd4_dec)nfsd4_decode_open,
1550 [OP_OPENATTR] = (nfsd4_dec)nfsd4_decode_notsupp,
1551 [OP_OPEN_CONFIRM] = (nfsd4_dec)nfsd4_decode_open_confirm,
1552 [OP_OPEN_DOWNGRADE] = (nfsd4_dec)nfsd4_decode_open_downgrade,
1553 [OP_PUTFH] = (nfsd4_dec)nfsd4_decode_putfh,
1554 [OP_PUTPUBFH] = (nfsd4_dec)nfsd4_decode_putpubfh,
1555 [OP_PUTROOTFH] = (nfsd4_dec)nfsd4_decode_noop,
1556 [OP_READ] = (nfsd4_dec)nfsd4_decode_read,
1557 [OP_READDIR] = (nfsd4_dec)nfsd4_decode_readdir,
1558 [OP_READLINK] = (nfsd4_dec)nfsd4_decode_noop,
1559 [OP_REMOVE] = (nfsd4_dec)nfsd4_decode_remove,
1560 [OP_RENAME] = (nfsd4_dec)nfsd4_decode_rename,
1561 [OP_RENEW] = (nfsd4_dec)nfsd4_decode_renew,
1562 [OP_RESTOREFH] = (nfsd4_dec)nfsd4_decode_noop,
1563 [OP_SAVEFH] = (nfsd4_dec)nfsd4_decode_noop,
1564 [OP_SECINFO] = (nfsd4_dec)nfsd4_decode_secinfo,
1565 [OP_SETATTR] = (nfsd4_dec)nfsd4_decode_setattr,
1566 [OP_SETCLIENTID] = (nfsd4_dec)nfsd4_decode_setclientid,
1567 [OP_SETCLIENTID_CONFIRM] = (nfsd4_dec)nfsd4_decode_setclientid_confirm,
1568 [OP_VERIFY] = (nfsd4_dec)nfsd4_decode_verify,
1569 [OP_WRITE] = (nfsd4_dec)nfsd4_decode_write,
1570 [OP_RELEASE_LOCKOWNER] = (nfsd4_dec)nfsd4_decode_release_lockowner,
1571
1572 /* new operations for NFSv4.1 */
1573 [OP_BACKCHANNEL_CTL] = (nfsd4_dec)nfsd4_decode_backchannel_ctl,
1574 [OP_BIND_CONN_TO_SESSION]= (nfsd4_dec)nfsd4_decode_bind_conn_to_session,
1575 [OP_EXCHANGE_ID] = (nfsd4_dec)nfsd4_decode_exchange_id,
1576 [OP_CREATE_SESSION] = (nfsd4_dec)nfsd4_decode_create_session,
1577 [OP_DESTROY_SESSION] = (nfsd4_dec)nfsd4_decode_destroy_session,
1578 [OP_FREE_STATEID] = (nfsd4_dec)nfsd4_decode_free_stateid,
1579 [OP_GET_DIR_DELEGATION] = (nfsd4_dec)nfsd4_decode_notsupp,
1580 [OP_GETDEVICEINFO] = (nfsd4_dec)nfsd4_decode_notsupp,
1581 [OP_GETDEVICELIST] = (nfsd4_dec)nfsd4_decode_notsupp,
1582 [OP_LAYOUTCOMMIT] = (nfsd4_dec)nfsd4_decode_notsupp,
1583 [OP_LAYOUTGET] = (nfsd4_dec)nfsd4_decode_notsupp,
1584 [OP_LAYOUTRETURN] = (nfsd4_dec)nfsd4_decode_notsupp,
1585 [OP_SECINFO_NO_NAME] = (nfsd4_dec)nfsd4_decode_secinfo_no_name,
1586 [OP_SEQUENCE] = (nfsd4_dec)nfsd4_decode_sequence,
1587 [OP_SET_SSV] = (nfsd4_dec)nfsd4_decode_notsupp,
1588 [OP_TEST_STATEID] = (nfsd4_dec)nfsd4_decode_test_stateid,
1589 [OP_WANT_DELEGATION] = (nfsd4_dec)nfsd4_decode_notsupp,
1590 [OP_DESTROY_CLIENTID] = (nfsd4_dec)nfsd4_decode_destroy_clientid,
1591 [OP_RECLAIM_COMPLETE] = (nfsd4_dec)nfsd4_decode_reclaim_complete,
1592 };
1593
1594 static inline bool
1595 nfsd4_opnum_in_range(struct nfsd4_compoundargs *argp, struct nfsd4_op *op)
1596 {
1597 if (op->opnum < FIRST_NFS4_OP)
1598 return false;
1599 else if (argp->minorversion == 0 && op->opnum > LAST_NFS40_OP)
1600 return false;
1601 else if (argp->minorversion == 1 && op->opnum > LAST_NFS41_OP)
1602 return false;
1603 else if (argp->minorversion == 2 && op->opnum > LAST_NFS42_OP)
1604 return false;
1605 return true;
1606 }
1607
1608 /*
1609 * Return a rough estimate of the maximum possible reply size. Note the
1610 * estimate includes rpc headers so is meant to be passed to
1611 * svc_reserve, not svc_reserve_auth.
1612 *
1613 * Also note the current compound encoding permits only one operation to
1614 * use pages beyond the first one, so the maximum possible length is the
1615 * maximum over these values, not the sum.
1616 */
1617 static int nfsd4_max_reply(u32 opnum)
1618 {
1619 switch (opnum) {
1620 case OP_READLINK:
1621 case OP_READDIR:
1622 /*
1623 * Both of these ops take a single page for data and put
1624 * the head and tail in another page:
1625 */
1626 return 2 * PAGE_SIZE;
1627 case OP_READ:
1628 return INT_MAX;
1629 default:
1630 return PAGE_SIZE;
1631 }
1632 }
1633
1634 static __be32
1635 nfsd4_decode_compound(struct nfsd4_compoundargs *argp)
1636 {
1637 DECODE_HEAD;
1638 struct nfsd4_op *op;
1639 bool cachethis = false;
1640 int max_reply = PAGE_SIZE;
1641 int i;
1642
1643 READ_BUF(4);
1644 READ32(argp->taglen);
1645 READ_BUF(argp->taglen + 8);
1646 SAVEMEM(argp->tag, argp->taglen);
1647 READ32(argp->minorversion);
1648 READ32(argp->opcnt);
1649
1650 if (argp->taglen > NFSD4_MAX_TAGLEN)
1651 goto xdr_error;
1652 if (argp->opcnt > 100)
1653 goto xdr_error;
1654
1655 if (argp->opcnt > ARRAY_SIZE(argp->iops)) {
1656 argp->ops = kmalloc(argp->opcnt * sizeof(*argp->ops), GFP_KERNEL);
1657 if (!argp->ops) {
1658 argp->ops = argp->iops;
1659 dprintk("nfsd: couldn't allocate room for COMPOUND\n");
1660 goto xdr_error;
1661 }
1662 }
1663
1664 if (argp->minorversion > NFSD_SUPPORTED_MINOR_VERSION)
1665 argp->opcnt = 0;
1666
1667 for (i = 0; i < argp->opcnt; i++) {
1668 op = &argp->ops[i];
1669 op->replay = NULL;
1670
1671 READ_BUF(4);
1672 READ32(op->opnum);
1673
1674 if (nfsd4_opnum_in_range(argp, op))
1675 op->status = nfsd4_dec_ops[op->opnum](argp, &op->u);
1676 else {
1677 op->opnum = OP_ILLEGAL;
1678 op->status = nfserr_op_illegal;
1679 }
1680
1681 if (op->status) {
1682 argp->opcnt = i+1;
1683 break;
1684 }
1685 /*
1686 * We'll try to cache the result in the DRC if any one
1687 * op in the compound wants to be cached:
1688 */
1689 cachethis |= nfsd4_cache_this_op(op);
1690
1691 max_reply = max(max_reply, nfsd4_max_reply(op->opnum));
1692 }
1693 /* Sessions make the DRC unnecessary: */
1694 if (argp->minorversion)
1695 cachethis = false;
1696 if (max_reply != INT_MAX)
1697 svc_reserve(argp->rqstp, max_reply);
1698 argp->rqstp->rq_cachetype = cachethis ? RC_REPLBUFF : RC_NOCACHE;
1699
1700 DECODE_TAIL;
1701 }
1702
1703 #define WRITE32(n) *p++ = htonl(n)
1704 #define WRITE64(n) do { \
1705 *p++ = htonl((u32)((n) >> 32)); \
1706 *p++ = htonl((u32)(n)); \
1707 } while (0)
1708 #define WRITEMEM(ptr,nbytes) do { if (nbytes > 0) { \
1709 *(p + XDR_QUADLEN(nbytes) -1) = 0; \
1710 memcpy(p, ptr, nbytes); \
1711 p += XDR_QUADLEN(nbytes); \
1712 }} while (0)
1713
1714 static void write32(__be32 **p, u32 n)
1715 {
1716 *(*p)++ = htonl(n);
1717 }
1718
1719 static void write64(__be32 **p, u64 n)
1720 {
1721 write32(p, (n >> 32));
1722 write32(p, (u32)n);
1723 }
1724
1725 static void write_change(__be32 **p, struct kstat *stat, struct inode *inode)
1726 {
1727 if (IS_I_VERSION(inode)) {
1728 write64(p, inode->i_version);
1729 } else {
1730 write32(p, stat->ctime.tv_sec);
1731 write32(p, stat->ctime.tv_nsec);
1732 }
1733 }
1734
1735 static void write_cinfo(__be32 **p, struct nfsd4_change_info *c)
1736 {
1737 write32(p, c->atomic);
1738 if (c->change_supported) {
1739 write64(p, c->before_change);
1740 write64(p, c->after_change);
1741 } else {
1742 write32(p, c->before_ctime_sec);
1743 write32(p, c->before_ctime_nsec);
1744 write32(p, c->after_ctime_sec);
1745 write32(p, c->after_ctime_nsec);
1746 }
1747 }
1748
1749 #define RESERVE_SPACE(nbytes) do { \
1750 p = resp->p; \
1751 BUG_ON(p + XDR_QUADLEN(nbytes) > resp->end); \
1752 } while (0)
1753 #define ADJUST_ARGS() resp->p = p
1754
1755 /* Encode as an array of strings the string given with components
1756 * separated @sep, escaped with esc_enter and esc_exit.
1757 */
1758 static __be32 nfsd4_encode_components_esc(char sep, char *components,
1759 __be32 **pp, int *buflen,
1760 char esc_enter, char esc_exit)
1761 {
1762 __be32 *p = *pp;
1763 __be32 *countp = p;
1764 int strlen, count=0;
1765 char *str, *end, *next;
1766
1767 dprintk("nfsd4_encode_components(%s)\n", components);
1768 if ((*buflen -= 4) < 0)
1769 return nfserr_resource;
1770 WRITE32(0); /* We will fill this in with @count later */
1771 end = str = components;
1772 while (*end) {
1773 bool found_esc = false;
1774
1775 /* try to parse as esc_start, ..., esc_end, sep */
1776 if (*str == esc_enter) {
1777 for (; *end && (*end != esc_exit); end++)
1778 /* find esc_exit or end of string */;
1779 next = end + 1;
1780 if (*end && (!*next || *next == sep)) {
1781 str++;
1782 found_esc = true;
1783 }
1784 }
1785
1786 if (!found_esc)
1787 for (; *end && (*end != sep); end++)
1788 /* find sep or end of string */;
1789
1790 strlen = end - str;
1791 if (strlen) {
1792 if ((*buflen -= ((XDR_QUADLEN(strlen) << 2) + 4)) < 0)
1793 return nfserr_resource;
1794 WRITE32(strlen);
1795 WRITEMEM(str, strlen);
1796 count++;
1797 }
1798 else
1799 end++;
1800 str = end;
1801 }
1802 *pp = p;
1803 p = countp;
1804 WRITE32(count);
1805 return 0;
1806 }
1807
1808 /* Encode as an array of strings the string given with components
1809 * separated @sep.
1810 */
1811 static __be32 nfsd4_encode_components(char sep, char *components,
1812 __be32 **pp, int *buflen)
1813 {
1814 return nfsd4_encode_components_esc(sep, components, pp, buflen, 0, 0);
1815 }
1816
1817 /*
1818 * encode a location element of a fs_locations structure
1819 */
1820 static __be32 nfsd4_encode_fs_location4(struct nfsd4_fs_location *location,
1821 __be32 **pp, int *buflen)
1822 {
1823 __be32 status;
1824 __be32 *p = *pp;
1825
1826 status = nfsd4_encode_components_esc(':', location->hosts, &p, buflen,
1827 '[', ']');
1828 if (status)
1829 return status;
1830 status = nfsd4_encode_components('/', location->path, &p, buflen);
1831 if (status)
1832 return status;
1833 *pp = p;
1834 return 0;
1835 }
1836
1837 /*
1838 * Encode a path in RFC3530 'pathname4' format
1839 */
1840 static __be32 nfsd4_encode_path(const struct path *root,
1841 const struct path *path, __be32 **pp, int *buflen)
1842 {
1843 struct path cur = *path;
1844 __be32 *p = *pp;
1845 struct dentry **components = NULL;
1846 unsigned int ncomponents = 0;
1847 __be32 err = nfserr_jukebox;
1848
1849 dprintk("nfsd4_encode_components(");
1850
1851 path_get(&cur);
1852 /* First walk the path up to the nfsd root, and store the
1853 * dentries/path components in an array.
1854 */
1855 for (;;) {
1856 if (cur.dentry == root->dentry && cur.mnt == root->mnt)
1857 break;
1858 if (cur.dentry == cur.mnt->mnt_root) {
1859 if (follow_up(&cur))
1860 continue;
1861 goto out_free;
1862 }
1863 if ((ncomponents & 15) == 0) {
1864 struct dentry **new;
1865 new = krealloc(components,
1866 sizeof(*new) * (ncomponents + 16),
1867 GFP_KERNEL);
1868 if (!new)
1869 goto out_free;
1870 components = new;
1871 }
1872 components[ncomponents++] = cur.dentry;
1873 cur.dentry = dget_parent(cur.dentry);
1874 }
1875
1876 *buflen -= 4;
1877 if (*buflen < 0)
1878 goto out_free;
1879 WRITE32(ncomponents);
1880
1881 while (ncomponents) {
1882 struct dentry *dentry = components[ncomponents - 1];
1883 unsigned int len;
1884
1885 spin_lock(&dentry->d_lock);
1886 len = dentry->d_name.len;
1887 *buflen -= 4 + (XDR_QUADLEN(len) << 2);
1888 if (*buflen < 0) {
1889 spin_unlock(&dentry->d_lock);
1890 goto out_free;
1891 }
1892 WRITE32(len);
1893 WRITEMEM(dentry->d_name.name, len);
1894 dprintk("/%s", dentry->d_name.name);
1895 spin_unlock(&dentry->d_lock);
1896 dput(dentry);
1897 ncomponents--;
1898 }
1899
1900 *pp = p;
1901 err = 0;
1902 out_free:
1903 dprintk(")\n");
1904 while (ncomponents)
1905 dput(components[--ncomponents]);
1906 kfree(components);
1907 path_put(&cur);
1908 return err;
1909 }
1910
1911 static __be32 nfsd4_encode_fsloc_fsroot(struct svc_rqst *rqstp,
1912 const struct path *path, __be32 **pp, int *buflen)
1913 {
1914 struct svc_export *exp_ps;
1915 __be32 res;
1916
1917 exp_ps = rqst_find_fsidzero_export(rqstp);
1918 if (IS_ERR(exp_ps))
1919 return nfserrno(PTR_ERR(exp_ps));
1920 res = nfsd4_encode_path(&exp_ps->ex_path, path, pp, buflen);
1921 exp_put(exp_ps);
1922 return res;
1923 }
1924
1925 /*
1926 * encode a fs_locations structure
1927 */
1928 static __be32 nfsd4_encode_fs_locations(struct svc_rqst *rqstp,
1929 struct svc_export *exp,
1930 __be32 **pp, int *buflen)
1931 {
1932 __be32 status;
1933 int i;
1934 __be32 *p = *pp;
1935 struct nfsd4_fs_locations *fslocs = &exp->ex_fslocs;
1936
1937 status = nfsd4_encode_fsloc_fsroot(rqstp, &exp->ex_path, &p, buflen);
1938 if (status)
1939 return status;
1940 if ((*buflen -= 4) < 0)
1941 return nfserr_resource;
1942 WRITE32(fslocs->locations_count);
1943 for (i=0; i<fslocs->locations_count; i++) {
1944 status = nfsd4_encode_fs_location4(&fslocs->locations[i],
1945 &p, buflen);
1946 if (status)
1947 return status;
1948 }
1949 *pp = p;
1950 return 0;
1951 }
1952
1953 static u32 nfs4_file_type(umode_t mode)
1954 {
1955 switch (mode & S_IFMT) {
1956 case S_IFIFO: return NF4FIFO;
1957 case S_IFCHR: return NF4CHR;
1958 case S_IFDIR: return NF4DIR;
1959 case S_IFBLK: return NF4BLK;
1960 case S_IFLNK: return NF4LNK;
1961 case S_IFREG: return NF4REG;
1962 case S_IFSOCK: return NF4SOCK;
1963 default: return NF4BAD;
1964 };
1965 }
1966
1967 static inline __be32
1968 nfsd4_encode_aclname(struct svc_rqst *rqstp, struct nfs4_ace *ace,
1969 __be32 **p, int *buflen)
1970 {
1971 if (ace->whotype != NFS4_ACL_WHO_NAMED)
1972 return nfs4_acl_write_who(ace->whotype, p, buflen);
1973 else if (ace->flag & NFS4_ACE_IDENTIFIER_GROUP)
1974 return nfsd4_encode_group(rqstp, ace->who_gid, p, buflen);
1975 else
1976 return nfsd4_encode_user(rqstp, ace->who_uid, p, buflen);
1977 }
1978
1979 #define WORD0_ABSENT_FS_ATTRS (FATTR4_WORD0_FS_LOCATIONS | FATTR4_WORD0_FSID | \
1980 FATTR4_WORD0_RDATTR_ERROR)
1981 #define WORD1_ABSENT_FS_ATTRS FATTR4_WORD1_MOUNTED_ON_FILEID
1982
1983 #ifdef CONFIG_NFSD_V4_SECURITY_LABEL
1984 static inline __be32
1985 nfsd4_encode_security_label(struct svc_rqst *rqstp, void *context, int len, __be32 **pp, int *buflen)
1986 {
1987 __be32 *p = *pp;
1988
1989 if (*buflen < ((XDR_QUADLEN(len) << 2) + 4 + 4 + 4))
1990 return nfserr_resource;
1991
1992 /*
1993 * For now we use a 0 here to indicate the null translation; in
1994 * the future we may place a call to translation code here.
1995 */
1996 if ((*buflen -= 8) < 0)
1997 return nfserr_resource;
1998
1999 WRITE32(0); /* lfs */
2000 WRITE32(0); /* pi */
2001 p = xdr_encode_opaque(p, context, len);
2002 *buflen -= (XDR_QUADLEN(len) << 2) + 4;
2003
2004 *pp = p;
2005 return 0;
2006 }
2007 #else
2008 static inline __be32
2009 nfsd4_encode_security_label(struct svc_rqst *rqstp, void *context, int len, __be32 **pp, int *buflen)
2010 { return 0; }
2011 #endif
2012
2013 static __be32 fattr_handle_absent_fs(u32 *bmval0, u32 *bmval1, u32 *rdattr_err)
2014 {
2015 /* As per referral draft: */
2016 if (*bmval0 & ~WORD0_ABSENT_FS_ATTRS ||
2017 *bmval1 & ~WORD1_ABSENT_FS_ATTRS) {
2018 if (*bmval0 & FATTR4_WORD0_RDATTR_ERROR ||
2019 *bmval0 & FATTR4_WORD0_FS_LOCATIONS)
2020 *rdattr_err = NFSERR_MOVED;
2021 else
2022 return nfserr_moved;
2023 }
2024 *bmval0 &= WORD0_ABSENT_FS_ATTRS;
2025 *bmval1 &= WORD1_ABSENT_FS_ATTRS;
2026 return 0;
2027 }
2028
2029
2030 static int get_parent_attributes(struct svc_export *exp, struct kstat *stat)
2031 {
2032 struct path path = exp->ex_path;
2033 int err;
2034
2035 path_get(&path);
2036 while (follow_up(&path)) {
2037 if (path.dentry != path.mnt->mnt_root)
2038 break;
2039 }
2040 err = vfs_getattr(&path, stat);
2041 path_put(&path);
2042 return err;
2043 }
2044
2045 /*
2046 * Note: @fhp can be NULL; in this case, we might have to compose the filehandle
2047 * ourselves.
2048 *
2049 * countp is the buffer size in _words_
2050 */
2051 __be32
2052 nfsd4_encode_fattr(struct svc_fh *fhp, struct svc_export *exp,
2053 struct dentry *dentry, __be32 **buffer, int count, u32 *bmval,
2054 struct svc_rqst *rqstp, int ignore_crossmnt)
2055 {
2056 u32 bmval0 = bmval[0];
2057 u32 bmval1 = bmval[1];
2058 u32 bmval2 = bmval[2];
2059 struct kstat stat;
2060 struct svc_fh *tempfh = NULL;
2061 struct kstatfs statfs;
2062 int buflen = count << 2;
2063 __be32 *attrlenp;
2064 u32 dummy;
2065 u64 dummy64;
2066 u32 rdattr_err = 0;
2067 __be32 *p = *buffer;
2068 __be32 status;
2069 int err;
2070 int aclsupport = 0;
2071 struct nfs4_acl *acl = NULL;
2072 void *context = NULL;
2073 int contextlen;
2074 bool contextsupport = false;
2075 struct nfsd4_compoundres *resp = rqstp->rq_resp;
2076 u32 minorversion = resp->cstate.minorversion;
2077 struct path path = {
2078 .mnt = exp->ex_path.mnt,
2079 .dentry = dentry,
2080 };
2081 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
2082
2083 BUG_ON(bmval1 & NFSD_WRITEONLY_ATTRS_WORD1);
2084 BUG_ON(bmval0 & ~nfsd_suppattrs0(minorversion));
2085 BUG_ON(bmval1 & ~nfsd_suppattrs1(minorversion));
2086 BUG_ON(bmval2 & ~nfsd_suppattrs2(minorversion));
2087
2088 if (exp->ex_fslocs.migrated) {
2089 BUG_ON(bmval[2]);
2090 status = fattr_handle_absent_fs(&bmval0, &bmval1, &rdattr_err);
2091 if (status)
2092 goto out;
2093 }
2094
2095 err = vfs_getattr(&path, &stat);
2096 if (err)
2097 goto out_nfserr;
2098 if ((bmval0 & (FATTR4_WORD0_FILES_FREE | FATTR4_WORD0_FILES_TOTAL |
2099 FATTR4_WORD0_MAXNAME)) ||
2100 (bmval1 & (FATTR4_WORD1_SPACE_AVAIL | FATTR4_WORD1_SPACE_FREE |
2101 FATTR4_WORD1_SPACE_TOTAL))) {
2102 err = vfs_statfs(&path, &statfs);
2103 if (err)
2104 goto out_nfserr;
2105 }
2106 if ((bmval0 & (FATTR4_WORD0_FILEHANDLE | FATTR4_WORD0_FSID)) && !fhp) {
2107 tempfh = kmalloc(sizeof(struct svc_fh), GFP_KERNEL);
2108 status = nfserr_jukebox;
2109 if (!tempfh)
2110 goto out;
2111 fh_init(tempfh, NFS4_FHSIZE);
2112 status = fh_compose(tempfh, exp, dentry, NULL);
2113 if (status)
2114 goto out;
2115 fhp = tempfh;
2116 }
2117 if (bmval0 & (FATTR4_WORD0_ACL | FATTR4_WORD0_ACLSUPPORT
2118 | FATTR4_WORD0_SUPPORTED_ATTRS)) {
2119 err = nfsd4_get_nfs4_acl(rqstp, dentry, &acl);
2120 aclsupport = (err == 0);
2121 if (bmval0 & FATTR4_WORD0_ACL) {
2122 if (err == -EOPNOTSUPP)
2123 bmval0 &= ~FATTR4_WORD0_ACL;
2124 else if (err == -EINVAL) {
2125 status = nfserr_attrnotsupp;
2126 goto out;
2127 } else if (err != 0)
2128 goto out_nfserr;
2129 }
2130 }
2131
2132 #ifdef CONFIG_NFSD_V4_SECURITY_LABEL
2133 if ((bmval[2] & FATTR4_WORD2_SECURITY_LABEL) ||
2134 bmval[0] & FATTR4_WORD0_SUPPORTED_ATTRS) {
2135 err = security_inode_getsecctx(dentry->d_inode,
2136 &context, &contextlen);
2137 contextsupport = (err == 0);
2138 if (bmval2 & FATTR4_WORD2_SECURITY_LABEL) {
2139 if (err == -EOPNOTSUPP)
2140 bmval2 &= ~FATTR4_WORD2_SECURITY_LABEL;
2141 else if (err)
2142 goto out_nfserr;
2143 }
2144 }
2145 #endif /* CONFIG_NFSD_V4_SECURITY_LABEL */
2146
2147 if (bmval2) {
2148 if ((buflen -= 16) < 0)
2149 goto out_resource;
2150 WRITE32(3);
2151 WRITE32(bmval0);
2152 WRITE32(bmval1);
2153 WRITE32(bmval2);
2154 } else if (bmval1) {
2155 if ((buflen -= 12) < 0)
2156 goto out_resource;
2157 WRITE32(2);
2158 WRITE32(bmval0);
2159 WRITE32(bmval1);
2160 } else {
2161 if ((buflen -= 8) < 0)
2162 goto out_resource;
2163 WRITE32(1);
2164 WRITE32(bmval0);
2165 }
2166 attrlenp = p++; /* to be backfilled later */
2167
2168 if (bmval0 & FATTR4_WORD0_SUPPORTED_ATTRS) {
2169 u32 word0 = nfsd_suppattrs0(minorversion);
2170 u32 word1 = nfsd_suppattrs1(minorversion);
2171 u32 word2 = nfsd_suppattrs2(minorversion);
2172
2173 if (!aclsupport)
2174 word0 &= ~FATTR4_WORD0_ACL;
2175 if (!contextsupport)
2176 word2 &= ~FATTR4_WORD2_SECURITY_LABEL;
2177 if (!word2) {
2178 if ((buflen -= 12) < 0)
2179 goto out_resource;
2180 WRITE32(2);
2181 WRITE32(word0);
2182 WRITE32(word1);
2183 } else {
2184 if ((buflen -= 16) < 0)
2185 goto out_resource;
2186 WRITE32(3);
2187 WRITE32(word0);
2188 WRITE32(word1);
2189 WRITE32(word2);
2190 }
2191 }
2192 if (bmval0 & FATTR4_WORD0_TYPE) {
2193 if ((buflen -= 4) < 0)
2194 goto out_resource;
2195 dummy = nfs4_file_type(stat.mode);
2196 if (dummy == NF4BAD) {
2197 status = nfserr_serverfault;
2198 goto out;
2199 }
2200 WRITE32(dummy);
2201 }
2202 if (bmval0 & FATTR4_WORD0_FH_EXPIRE_TYPE) {
2203 if ((buflen -= 4) < 0)
2204 goto out_resource;
2205 if (exp->ex_flags & NFSEXP_NOSUBTREECHECK)
2206 WRITE32(NFS4_FH_PERSISTENT);
2207 else
2208 WRITE32(NFS4_FH_PERSISTENT|NFS4_FH_VOL_RENAME);
2209 }
2210 if (bmval0 & FATTR4_WORD0_CHANGE) {
2211 if ((buflen -= 8) < 0)
2212 goto out_resource;
2213 write_change(&p, &stat, dentry->d_inode);
2214 }
2215 if (bmval0 & FATTR4_WORD0_SIZE) {
2216 if ((buflen -= 8) < 0)
2217 goto out_resource;
2218 WRITE64(stat.size);
2219 }
2220 if (bmval0 & FATTR4_WORD0_LINK_SUPPORT) {
2221 if ((buflen -= 4) < 0)
2222 goto out_resource;
2223 WRITE32(1);
2224 }
2225 if (bmval0 & FATTR4_WORD0_SYMLINK_SUPPORT) {
2226 if ((buflen -= 4) < 0)
2227 goto out_resource;
2228 WRITE32(1);
2229 }
2230 if (bmval0 & FATTR4_WORD0_NAMED_ATTR) {
2231 if ((buflen -= 4) < 0)
2232 goto out_resource;
2233 WRITE32(0);
2234 }
2235 if (bmval0 & FATTR4_WORD0_FSID) {
2236 if ((buflen -= 16) < 0)
2237 goto out_resource;
2238 if (exp->ex_fslocs.migrated) {
2239 WRITE64(NFS4_REFERRAL_FSID_MAJOR);
2240 WRITE64(NFS4_REFERRAL_FSID_MINOR);
2241 } else switch(fsid_source(fhp)) {
2242 case FSIDSOURCE_FSID:
2243 WRITE64((u64)exp->ex_fsid);
2244 WRITE64((u64)0);
2245 break;
2246 case FSIDSOURCE_DEV:
2247 WRITE32(0);
2248 WRITE32(MAJOR(stat.dev));
2249 WRITE32(0);
2250 WRITE32(MINOR(stat.dev));
2251 break;
2252 case FSIDSOURCE_UUID:
2253 WRITEMEM(exp->ex_uuid, 16);
2254 break;
2255 }
2256 }
2257 if (bmval0 & FATTR4_WORD0_UNIQUE_HANDLES) {
2258 if ((buflen -= 4) < 0)
2259 goto out_resource;
2260 WRITE32(0);
2261 }
2262 if (bmval0 & FATTR4_WORD0_LEASE_TIME) {
2263 if ((buflen -= 4) < 0)
2264 goto out_resource;
2265 WRITE32(nn->nfsd4_lease);
2266 }
2267 if (bmval0 & FATTR4_WORD0_RDATTR_ERROR) {
2268 if ((buflen -= 4) < 0)
2269 goto out_resource;
2270 WRITE32(rdattr_err);
2271 }
2272 if (bmval0 & FATTR4_WORD0_ACL) {
2273 struct nfs4_ace *ace;
2274
2275 if (acl == NULL) {
2276 if ((buflen -= 4) < 0)
2277 goto out_resource;
2278
2279 WRITE32(0);
2280 goto out_acl;
2281 }
2282 if ((buflen -= 4) < 0)
2283 goto out_resource;
2284 WRITE32(acl->naces);
2285
2286 for (ace = acl->aces; ace < acl->aces + acl->naces; ace++) {
2287 if ((buflen -= 4*3) < 0)
2288 goto out_resource;
2289 WRITE32(ace->type);
2290 WRITE32(ace->flag);
2291 WRITE32(ace->access_mask & NFS4_ACE_MASK_ALL);
2292 status = nfsd4_encode_aclname(rqstp, ace, &p, &buflen);
2293 if (status)
2294 goto out;
2295 }
2296 }
2297 out_acl:
2298 if (bmval0 & FATTR4_WORD0_ACLSUPPORT) {
2299 if ((buflen -= 4) < 0)
2300 goto out_resource;
2301 WRITE32(aclsupport ?
2302 ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL : 0);
2303 }
2304 if (bmval0 & FATTR4_WORD0_CANSETTIME) {
2305 if ((buflen -= 4) < 0)
2306 goto out_resource;
2307 WRITE32(1);
2308 }
2309 if (bmval0 & FATTR4_WORD0_CASE_INSENSITIVE) {
2310 if ((buflen -= 4) < 0)
2311 goto out_resource;
2312 WRITE32(0);
2313 }
2314 if (bmval0 & FATTR4_WORD0_CASE_PRESERVING) {
2315 if ((buflen -= 4) < 0)
2316 goto out_resource;
2317 WRITE32(1);
2318 }
2319 if (bmval0 & FATTR4_WORD0_CHOWN_RESTRICTED) {
2320 if ((buflen -= 4) < 0)
2321 goto out_resource;
2322 WRITE32(1);
2323 }
2324 if (bmval0 & FATTR4_WORD0_FILEHANDLE) {
2325 buflen -= (XDR_QUADLEN(fhp->fh_handle.fh_size) << 2) + 4;
2326 if (buflen < 0)
2327 goto out_resource;
2328 WRITE32(fhp->fh_handle.fh_size);
2329 WRITEMEM(&fhp->fh_handle.fh_base, fhp->fh_handle.fh_size);
2330 }
2331 if (bmval0 & FATTR4_WORD0_FILEID) {
2332 if ((buflen -= 8) < 0)
2333 goto out_resource;
2334 WRITE64(stat.ino);
2335 }
2336 if (bmval0 & FATTR4_WORD0_FILES_AVAIL) {
2337 if ((buflen -= 8) < 0)
2338 goto out_resource;
2339 WRITE64((u64) statfs.f_ffree);
2340 }
2341 if (bmval0 & FATTR4_WORD0_FILES_FREE) {
2342 if ((buflen -= 8) < 0)
2343 goto out_resource;
2344 WRITE64((u64) statfs.f_ffree);
2345 }
2346 if (bmval0 & FATTR4_WORD0_FILES_TOTAL) {
2347 if ((buflen -= 8) < 0)
2348 goto out_resource;
2349 WRITE64((u64) statfs.f_files);
2350 }
2351 if (bmval0 & FATTR4_WORD0_FS_LOCATIONS) {
2352 status = nfsd4_encode_fs_locations(rqstp, exp, &p, &buflen);
2353 if (status)
2354 goto out;
2355 }
2356 if (bmval0 & FATTR4_WORD0_HOMOGENEOUS) {
2357 if ((buflen -= 4) < 0)
2358 goto out_resource;
2359 WRITE32(1);
2360 }
2361 if (bmval0 & FATTR4_WORD0_MAXFILESIZE) {
2362 if ((buflen -= 8) < 0)
2363 goto out_resource;
2364 WRITE64(exp->ex_path.mnt->mnt_sb->s_maxbytes);
2365 }
2366 if (bmval0 & FATTR4_WORD0_MAXLINK) {
2367 if ((buflen -= 4) < 0)
2368 goto out_resource;
2369 WRITE32(255);
2370 }
2371 if (bmval0 & FATTR4_WORD0_MAXNAME) {
2372 if ((buflen -= 4) < 0)
2373 goto out_resource;
2374 WRITE32(statfs.f_namelen);
2375 }
2376 if (bmval0 & FATTR4_WORD0_MAXREAD) {
2377 if ((buflen -= 8) < 0)
2378 goto out_resource;
2379 WRITE64((u64) svc_max_payload(rqstp));
2380 }
2381 if (bmval0 & FATTR4_WORD0_MAXWRITE) {
2382 if ((buflen -= 8) < 0)
2383 goto out_resource;
2384 WRITE64((u64) svc_max_payload(rqstp));
2385 }
2386 if (bmval1 & FATTR4_WORD1_MODE) {
2387 if ((buflen -= 4) < 0)
2388 goto out_resource;
2389 WRITE32(stat.mode & S_IALLUGO);
2390 }
2391 if (bmval1 & FATTR4_WORD1_NO_TRUNC) {
2392 if ((buflen -= 4) < 0)
2393 goto out_resource;
2394 WRITE32(1);
2395 }
2396 if (bmval1 & FATTR4_WORD1_NUMLINKS) {
2397 if ((buflen -= 4) < 0)
2398 goto out_resource;
2399 WRITE32(stat.nlink);
2400 }
2401 if (bmval1 & FATTR4_WORD1_OWNER) {
2402 status = nfsd4_encode_user(rqstp, stat.uid, &p, &buflen);
2403 if (status)
2404 goto out;
2405 }
2406 if (bmval1 & FATTR4_WORD1_OWNER_GROUP) {
2407 status = nfsd4_encode_group(rqstp, stat.gid, &p, &buflen);
2408 if (status)
2409 goto out;
2410 }
2411 if (bmval1 & FATTR4_WORD1_RAWDEV) {
2412 if ((buflen -= 8) < 0)
2413 goto out_resource;
2414 WRITE32((u32) MAJOR(stat.rdev));
2415 WRITE32((u32) MINOR(stat.rdev));
2416 }
2417 if (bmval1 & FATTR4_WORD1_SPACE_AVAIL) {
2418 if ((buflen -= 8) < 0)
2419 goto out_resource;
2420 dummy64 = (u64)statfs.f_bavail * (u64)statfs.f_bsize;
2421 WRITE64(dummy64);
2422 }
2423 if (bmval1 & FATTR4_WORD1_SPACE_FREE) {
2424 if ((buflen -= 8) < 0)
2425 goto out_resource;
2426 dummy64 = (u64)statfs.f_bfree * (u64)statfs.f_bsize;
2427 WRITE64(dummy64);
2428 }
2429 if (bmval1 & FATTR4_WORD1_SPACE_TOTAL) {
2430 if ((buflen -= 8) < 0)
2431 goto out_resource;
2432 dummy64 = (u64)statfs.f_blocks * (u64)statfs.f_bsize;
2433 WRITE64(dummy64);
2434 }
2435 if (bmval1 & FATTR4_WORD1_SPACE_USED) {
2436 if ((buflen -= 8) < 0)
2437 goto out_resource;
2438 dummy64 = (u64)stat.blocks << 9;
2439 WRITE64(dummy64);
2440 }
2441 if (bmval1 & FATTR4_WORD1_TIME_ACCESS) {
2442 if ((buflen -= 12) < 0)
2443 goto out_resource;
2444 WRITE64((s64)stat.atime.tv_sec);
2445 WRITE32(stat.atime.tv_nsec);
2446 }
2447 if (bmval1 & FATTR4_WORD1_TIME_DELTA) {
2448 if ((buflen -= 12) < 0)
2449 goto out_resource;
2450 WRITE32(0);
2451 WRITE32(1);
2452 WRITE32(0);
2453 }
2454 if (bmval1 & FATTR4_WORD1_TIME_METADATA) {
2455 if ((buflen -= 12) < 0)
2456 goto out_resource;
2457 WRITE64((s64)stat.ctime.tv_sec);
2458 WRITE32(stat.ctime.tv_nsec);
2459 }
2460 if (bmval1 & FATTR4_WORD1_TIME_MODIFY) {
2461 if ((buflen -= 12) < 0)
2462 goto out_resource;
2463 WRITE64((s64)stat.mtime.tv_sec);
2464 WRITE32(stat.mtime.tv_nsec);
2465 }
2466 if (bmval1 & FATTR4_WORD1_MOUNTED_ON_FILEID) {
2467 if ((buflen -= 8) < 0)
2468 goto out_resource;
2469 /*
2470 * Get parent's attributes if not ignoring crossmount
2471 * and this is the root of a cross-mounted filesystem.
2472 */
2473 if (ignore_crossmnt == 0 &&
2474 dentry == exp->ex_path.mnt->mnt_root)
2475 get_parent_attributes(exp, &stat);
2476 WRITE64(stat.ino);
2477 }
2478 if (bmval2 & FATTR4_WORD2_SECURITY_LABEL) {
2479 status = nfsd4_encode_security_label(rqstp, context,
2480 contextlen, &p, &buflen);
2481 if (status)
2482 goto out;
2483 }
2484 if (bmval2 & FATTR4_WORD2_SUPPATTR_EXCLCREAT) {
2485 if ((buflen -= 16) < 0)
2486 goto out_resource;
2487 WRITE32(3);
2488 WRITE32(NFSD_SUPPATTR_EXCLCREAT_WORD0);
2489 WRITE32(NFSD_SUPPATTR_EXCLCREAT_WORD1);
2490 WRITE32(NFSD_SUPPATTR_EXCLCREAT_WORD2);
2491 }
2492
2493 *attrlenp = htonl((char *)p - (char *)attrlenp - 4);
2494 *buffer = p;
2495 status = nfs_ok;
2496
2497 out:
2498 #ifdef CONFIG_NFSD_V4_SECURITY_LABEL
2499 if (context)
2500 security_release_secctx(context, contextlen);
2501 #endif /* CONFIG_NFSD_V4_SECURITY_LABEL */
2502 kfree(acl);
2503 if (tempfh) {
2504 fh_put(tempfh);
2505 kfree(tempfh);
2506 }
2507 return status;
2508 out_nfserr:
2509 status = nfserrno(err);
2510 goto out;
2511 out_resource:
2512 status = nfserr_resource;
2513 goto out;
2514 }
2515
2516 static inline int attributes_need_mount(u32 *bmval)
2517 {
2518 if (bmval[0] & ~(FATTR4_WORD0_RDATTR_ERROR | FATTR4_WORD0_LEASE_TIME))
2519 return 1;
2520 if (bmval[1] & ~FATTR4_WORD1_MOUNTED_ON_FILEID)
2521 return 1;
2522 return 0;
2523 }
2524
2525 static __be32
2526 nfsd4_encode_dirent_fattr(struct nfsd4_readdir *cd,
2527 const char *name, int namlen, __be32 **p, int buflen)
2528 {
2529 struct svc_export *exp = cd->rd_fhp->fh_export;
2530 struct dentry *dentry;
2531 __be32 nfserr;
2532 int ignore_crossmnt = 0;
2533
2534 dentry = lookup_one_len(name, cd->rd_fhp->fh_dentry, namlen);
2535 if (IS_ERR(dentry))
2536 return nfserrno(PTR_ERR(dentry));
2537 if (!dentry->d_inode) {
2538 /*
2539 * nfsd_buffered_readdir drops the i_mutex between
2540 * readdir and calling this callback, leaving a window
2541 * where this directory entry could have gone away.
2542 */
2543 dput(dentry);
2544 return nfserr_noent;
2545 }
2546
2547 exp_get(exp);
2548 /*
2549 * In the case of a mountpoint, the client may be asking for
2550 * attributes that are only properties of the underlying filesystem
2551 * as opposed to the cross-mounted file system. In such a case,
2552 * we will not follow the cross mount and will fill the attribtutes
2553 * directly from the mountpoint dentry.
2554 */
2555 if (nfsd_mountpoint(dentry, exp)) {
2556 int err;
2557
2558 if (!(exp->ex_flags & NFSEXP_V4ROOT)
2559 && !attributes_need_mount(cd->rd_bmval)) {
2560 ignore_crossmnt = 1;
2561 goto out_encode;
2562 }
2563 /*
2564 * Why the heck aren't we just using nfsd_lookup??
2565 * Different "."/".." handling? Something else?
2566 * At least, add a comment here to explain....
2567 */
2568 err = nfsd_cross_mnt(cd->rd_rqstp, &dentry, &exp);
2569 if (err) {
2570 nfserr = nfserrno(err);
2571 goto out_put;
2572 }
2573 nfserr = check_nfsd_access(exp, cd->rd_rqstp);
2574 if (nfserr)
2575 goto out_put;
2576
2577 }
2578 out_encode:
2579 nfserr = nfsd4_encode_fattr(NULL, exp, dentry, p, buflen, cd->rd_bmval,
2580 cd->rd_rqstp, ignore_crossmnt);
2581 out_put:
2582 dput(dentry);
2583 exp_put(exp);
2584 return nfserr;
2585 }
2586
2587 static __be32 *
2588 nfsd4_encode_rdattr_error(__be32 *p, int buflen, __be32 nfserr)
2589 {
2590 if (buflen < 6)
2591 return NULL;
2592 *p++ = htonl(2);
2593 *p++ = htonl(FATTR4_WORD0_RDATTR_ERROR); /* bmval0 */
2594 *p++ = htonl(0); /* bmval1 */
2595
2596 *p++ = htonl(4); /* attribute length */
2597 *p++ = nfserr; /* no htonl */
2598 return p;
2599 }
2600
2601 static int
2602 nfsd4_encode_dirent(void *ccdv, const char *name, int namlen,
2603 loff_t offset, u64 ino, unsigned int d_type)
2604 {
2605 struct readdir_cd *ccd = ccdv;
2606 struct nfsd4_readdir *cd = container_of(ccd, struct nfsd4_readdir, common);
2607 int buflen;
2608 __be32 *p = cd->buffer;
2609 __be32 *cookiep;
2610 __be32 nfserr = nfserr_toosmall;
2611
2612 /* In nfsv4, "." and ".." never make it onto the wire.. */
2613 if (name && isdotent(name, namlen)) {
2614 cd->common.err = nfs_ok;
2615 return 0;
2616 }
2617
2618 if (cd->offset)
2619 xdr_encode_hyper(cd->offset, (u64) offset);
2620
2621 buflen = cd->buflen - 4 - XDR_QUADLEN(namlen);
2622 if (buflen < 0)
2623 goto fail;
2624
2625 *p++ = xdr_one; /* mark entry present */
2626 cookiep = p;
2627 p = xdr_encode_hyper(p, NFS_OFFSET_MAX); /* offset of next entry */
2628 p = xdr_encode_array(p, name, namlen); /* name length & name */
2629
2630 nfserr = nfsd4_encode_dirent_fattr(cd, name, namlen, &p, buflen);
2631 switch (nfserr) {
2632 case nfs_ok:
2633 break;
2634 case nfserr_resource:
2635 nfserr = nfserr_toosmall;
2636 goto fail;
2637 case nfserr_noent:
2638 goto skip_entry;
2639 default:
2640 /*
2641 * If the client requested the RDATTR_ERROR attribute,
2642 * we stuff the error code into this attribute
2643 * and continue. If this attribute was not requested,
2644 * then in accordance with the spec, we fail the
2645 * entire READDIR operation(!)
2646 */
2647 if (!(cd->rd_bmval[0] & FATTR4_WORD0_RDATTR_ERROR))
2648 goto fail;
2649 p = nfsd4_encode_rdattr_error(p, buflen, nfserr);
2650 if (p == NULL) {
2651 nfserr = nfserr_toosmall;
2652 goto fail;
2653 }
2654 }
2655 cd->buflen -= (p - cd->buffer);
2656 cd->buffer = p;
2657 cd->offset = cookiep;
2658 skip_entry:
2659 cd->common.err = nfs_ok;
2660 return 0;
2661 fail:
2662 cd->common.err = nfserr;
2663 return -EINVAL;
2664 }
2665
2666 static void
2667 nfsd4_encode_stateid(struct nfsd4_compoundres *resp, stateid_t *sid)
2668 {
2669 __be32 *p;
2670
2671 RESERVE_SPACE(sizeof(stateid_t));
2672 WRITE32(sid->si_generation);
2673 WRITEMEM(&sid->si_opaque, sizeof(stateid_opaque_t));
2674 ADJUST_ARGS();
2675 }
2676
2677 static __be32
2678 nfsd4_encode_access(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_access *access)
2679 {
2680 __be32 *p;
2681
2682 if (!nfserr) {
2683 RESERVE_SPACE(8);
2684 WRITE32(access->ac_supported);
2685 WRITE32(access->ac_resp_access);
2686 ADJUST_ARGS();
2687 }
2688 return nfserr;
2689 }
2690
2691 static __be32 nfsd4_encode_bind_conn_to_session(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_bind_conn_to_session *bcts)
2692 {
2693 __be32 *p;
2694
2695 if (!nfserr) {
2696 RESERVE_SPACE(NFS4_MAX_SESSIONID_LEN + 8);
2697 WRITEMEM(bcts->sessionid.data, NFS4_MAX_SESSIONID_LEN);
2698 WRITE32(bcts->dir);
2699 /* Sorry, we do not yet support RDMA over 4.1: */
2700 WRITE32(0);
2701 ADJUST_ARGS();
2702 }
2703 return nfserr;
2704 }
2705
2706 static __be32
2707 nfsd4_encode_close(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_close *close)
2708 {
2709 if (!nfserr)
2710 nfsd4_encode_stateid(resp, &close->cl_stateid);
2711
2712 return nfserr;
2713 }
2714
2715
2716 static __be32
2717 nfsd4_encode_commit(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_commit *commit)
2718 {
2719 __be32 *p;
2720
2721 if (!nfserr) {
2722 RESERVE_SPACE(NFS4_VERIFIER_SIZE);
2723 WRITEMEM(commit->co_verf.data, NFS4_VERIFIER_SIZE);
2724 ADJUST_ARGS();
2725 }
2726 return nfserr;
2727 }
2728
2729 static __be32
2730 nfsd4_encode_create(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_create *create)
2731 {
2732 __be32 *p;
2733
2734 if (!nfserr) {
2735 RESERVE_SPACE(32);
2736 write_cinfo(&p, &create->cr_cinfo);
2737 WRITE32(2);
2738 WRITE32(create->cr_bmval[0]);
2739 WRITE32(create->cr_bmval[1]);
2740 ADJUST_ARGS();
2741 }
2742 return nfserr;
2743 }
2744
2745 static __be32
2746 nfsd4_encode_getattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_getattr *getattr)
2747 {
2748 struct svc_fh *fhp = getattr->ga_fhp;
2749 int buflen;
2750
2751 if (nfserr)
2752 return nfserr;
2753
2754 buflen = resp->end - resp->p - (COMPOUND_ERR_SLACK_SPACE >> 2);
2755 nfserr = nfsd4_encode_fattr(fhp, fhp->fh_export, fhp->fh_dentry,
2756 &resp->p, buflen, getattr->ga_bmval,
2757 resp->rqstp, 0);
2758 return nfserr;
2759 }
2760
2761 static __be32
2762 nfsd4_encode_getfh(struct nfsd4_compoundres *resp, __be32 nfserr, struct svc_fh **fhpp)
2763 {
2764 struct svc_fh *fhp = *fhpp;
2765 unsigned int len;
2766 __be32 *p;
2767
2768 if (!nfserr) {
2769 len = fhp->fh_handle.fh_size;
2770 RESERVE_SPACE(len + 4);
2771 WRITE32(len);
2772 WRITEMEM(&fhp->fh_handle.fh_base, len);
2773 ADJUST_ARGS();
2774 }
2775 return nfserr;
2776 }
2777
2778 /*
2779 * Including all fields other than the name, a LOCK4denied structure requires
2780 * 8(clientid) + 4(namelen) + 8(offset) + 8(length) + 4(type) = 32 bytes.
2781 */
2782 static void
2783 nfsd4_encode_lock_denied(struct nfsd4_compoundres *resp, struct nfsd4_lock_denied *ld)
2784 {
2785 struct xdr_netobj *conf = &ld->ld_owner;
2786 __be32 *p;
2787
2788 RESERVE_SPACE(32 + XDR_LEN(conf->len));
2789 WRITE64(ld->ld_start);
2790 WRITE64(ld->ld_length);
2791 WRITE32(ld->ld_type);
2792 if (conf->len) {
2793 WRITEMEM(&ld->ld_clientid, 8);
2794 WRITE32(conf->len);
2795 WRITEMEM(conf->data, conf->len);
2796 kfree(conf->data);
2797 } else { /* non - nfsv4 lock in conflict, no clientid nor owner */
2798 WRITE64((u64)0); /* clientid */
2799 WRITE32(0); /* length of owner name */
2800 }
2801 ADJUST_ARGS();
2802 }
2803
2804 static __be32
2805 nfsd4_encode_lock(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lock *lock)
2806 {
2807 if (!nfserr)
2808 nfsd4_encode_stateid(resp, &lock->lk_resp_stateid);
2809 else if (nfserr == nfserr_denied)
2810 nfsd4_encode_lock_denied(resp, &lock->lk_denied);
2811
2812 return nfserr;
2813 }
2814
2815 static __be32
2816 nfsd4_encode_lockt(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lockt *lockt)
2817 {
2818 if (nfserr == nfserr_denied)
2819 nfsd4_encode_lock_denied(resp, &lockt->lt_denied);
2820 return nfserr;
2821 }
2822
2823 static __be32
2824 nfsd4_encode_locku(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_locku *locku)
2825 {
2826 if (!nfserr)
2827 nfsd4_encode_stateid(resp, &locku->lu_stateid);
2828
2829 return nfserr;
2830 }
2831
2832
2833 static __be32
2834 nfsd4_encode_link(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_link *link)
2835 {
2836 __be32 *p;
2837
2838 if (!nfserr) {
2839 RESERVE_SPACE(20);
2840 write_cinfo(&p, &link->li_cinfo);
2841 ADJUST_ARGS();
2842 }
2843 return nfserr;
2844 }
2845
2846
2847 static __be32
2848 nfsd4_encode_open(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open *open)
2849 {
2850 __be32 *p;
2851
2852 if (nfserr)
2853 goto out;
2854
2855 nfsd4_encode_stateid(resp, &open->op_stateid);
2856 RESERVE_SPACE(40);
2857 write_cinfo(&p, &open->op_cinfo);
2858 WRITE32(open->op_rflags);
2859 WRITE32(2);
2860 WRITE32(open->op_bmval[0]);
2861 WRITE32(open->op_bmval[1]);
2862 WRITE32(open->op_delegate_type);
2863 ADJUST_ARGS();
2864
2865 switch (open->op_delegate_type) {
2866 case NFS4_OPEN_DELEGATE_NONE:
2867 break;
2868 case NFS4_OPEN_DELEGATE_READ:
2869 nfsd4_encode_stateid(resp, &open->op_delegate_stateid);
2870 RESERVE_SPACE(20);
2871 WRITE32(open->op_recall);
2872
2873 /*
2874 * TODO: ACE's in delegations
2875 */
2876 WRITE32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
2877 WRITE32(0);
2878 WRITE32(0);
2879 WRITE32(0); /* XXX: is NULL principal ok? */
2880 ADJUST_ARGS();
2881 break;
2882 case NFS4_OPEN_DELEGATE_WRITE:
2883 nfsd4_encode_stateid(resp, &open->op_delegate_stateid);
2884 RESERVE_SPACE(32);
2885 WRITE32(0);
2886
2887 /*
2888 * TODO: space_limit's in delegations
2889 */
2890 WRITE32(NFS4_LIMIT_SIZE);
2891 WRITE32(~(u32)0);
2892 WRITE32(~(u32)0);
2893
2894 /*
2895 * TODO: ACE's in delegations
2896 */
2897 WRITE32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
2898 WRITE32(0);
2899 WRITE32(0);
2900 WRITE32(0); /* XXX: is NULL principal ok? */
2901 ADJUST_ARGS();
2902 break;
2903 case NFS4_OPEN_DELEGATE_NONE_EXT: /* 4.1 */
2904 switch (open->op_why_no_deleg) {
2905 case WND4_CONTENTION:
2906 case WND4_RESOURCE:
2907 RESERVE_SPACE(8);
2908 WRITE32(open->op_why_no_deleg);
2909 WRITE32(0); /* deleg signaling not supported yet */
2910 break;
2911 default:
2912 RESERVE_SPACE(4);
2913 WRITE32(open->op_why_no_deleg);
2914 }
2915 ADJUST_ARGS();
2916 break;
2917 default:
2918 BUG();
2919 }
2920 /* XXX save filehandle here */
2921 out:
2922 return nfserr;
2923 }
2924
2925 static __be32
2926 nfsd4_encode_open_confirm(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_confirm *oc)
2927 {
2928 if (!nfserr)
2929 nfsd4_encode_stateid(resp, &oc->oc_resp_stateid);
2930
2931 return nfserr;
2932 }
2933
2934 static __be32
2935 nfsd4_encode_open_downgrade(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_downgrade *od)
2936 {
2937 if (!nfserr)
2938 nfsd4_encode_stateid(resp, &od->od_stateid);
2939
2940 return nfserr;
2941 }
2942
2943 static __be32
2944 nfsd4_encode_read(struct nfsd4_compoundres *resp, __be32 nfserr,
2945 struct nfsd4_read *read)
2946 {
2947 u32 eof;
2948 int v;
2949 struct page *page;
2950 unsigned long maxcount;
2951 long len;
2952 __be32 *p;
2953
2954 if (nfserr)
2955 return nfserr;
2956 if (resp->xbuf->page_len)
2957 return nfserr_resource;
2958
2959 RESERVE_SPACE(8); /* eof flag and byte count */
2960
2961 maxcount = svc_max_payload(resp->rqstp);
2962 if (maxcount > read->rd_length)
2963 maxcount = read->rd_length;
2964
2965 len = maxcount;
2966 v = 0;
2967 while (len > 0) {
2968 page = *(resp->rqstp->rq_next_page);
2969 if (!page) { /* ran out of pages */
2970 maxcount -= len;
2971 break;
2972 }
2973 resp->rqstp->rq_vec[v].iov_base = page_address(page);
2974 resp->rqstp->rq_vec[v].iov_len =
2975 len < PAGE_SIZE ? len : PAGE_SIZE;
2976 resp->rqstp->rq_next_page++;
2977 v++;
2978 len -= PAGE_SIZE;
2979 }
2980 read->rd_vlen = v;
2981
2982 nfserr = nfsd_read_file(read->rd_rqstp, read->rd_fhp, read->rd_filp,
2983 read->rd_offset, resp->rqstp->rq_vec, read->rd_vlen,
2984 &maxcount);
2985
2986 if (nfserr)
2987 return nfserr;
2988 eof = (read->rd_offset + maxcount >=
2989 read->rd_fhp->fh_dentry->d_inode->i_size);
2990
2991 WRITE32(eof);
2992 WRITE32(maxcount);
2993 ADJUST_ARGS();
2994 resp->xbuf->head[0].iov_len = (char*)p
2995 - (char*)resp->xbuf->head[0].iov_base;
2996 resp->xbuf->page_len = maxcount;
2997
2998 /* Use rest of head for padding and remaining ops: */
2999 resp->xbuf->tail[0].iov_base = p;
3000 resp->xbuf->tail[0].iov_len = 0;
3001 if (maxcount&3) {
3002 RESERVE_SPACE(4);
3003 WRITE32(0);
3004 resp->xbuf->tail[0].iov_base += maxcount&3;
3005 resp->xbuf->tail[0].iov_len = 4 - (maxcount&3);
3006 ADJUST_ARGS();
3007 }
3008 return 0;
3009 }
3010
3011 static __be32
3012 nfsd4_encode_readlink(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readlink *readlink)
3013 {
3014 int maxcount;
3015 char *page;
3016 __be32 *p;
3017
3018 if (nfserr)
3019 return nfserr;
3020 if (resp->xbuf->page_len)
3021 return nfserr_resource;
3022 if (!*resp->rqstp->rq_next_page)
3023 return nfserr_resource;
3024
3025 page = page_address(*(resp->rqstp->rq_next_page++));
3026
3027 maxcount = PAGE_SIZE;
3028 RESERVE_SPACE(4);
3029
3030 /*
3031 * XXX: By default, the ->readlink() VFS op will truncate symlinks
3032 * if they would overflow the buffer. Is this kosher in NFSv4? If
3033 * not, one easy fix is: if ->readlink() precisely fills the buffer,
3034 * assume that truncation occurred, and return NFS4ERR_RESOURCE.
3035 */
3036 nfserr = nfsd_readlink(readlink->rl_rqstp, readlink->rl_fhp, page, &maxcount);
3037 if (nfserr == nfserr_isdir)
3038 return nfserr_inval;
3039 if (nfserr)
3040 return nfserr;
3041
3042 WRITE32(maxcount);
3043 ADJUST_ARGS();
3044 resp->xbuf->head[0].iov_len = (char*)p
3045 - (char*)resp->xbuf->head[0].iov_base;
3046 resp->xbuf->page_len = maxcount;
3047
3048 /* Use rest of head for padding and remaining ops: */
3049 resp->xbuf->tail[0].iov_base = p;
3050 resp->xbuf->tail[0].iov_len = 0;
3051 if (maxcount&3) {
3052 RESERVE_SPACE(4);
3053 WRITE32(0);
3054 resp->xbuf->tail[0].iov_base += maxcount&3;
3055 resp->xbuf->tail[0].iov_len = 4 - (maxcount&3);
3056 ADJUST_ARGS();
3057 }
3058 return 0;
3059 }
3060
3061 static __be32
3062 nfsd4_encode_readdir(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readdir *readdir)
3063 {
3064 int maxcount;
3065 loff_t offset;
3066 __be32 *page, *savep, *tailbase;
3067 __be32 *p;
3068
3069 if (nfserr)
3070 return nfserr;
3071 if (resp->xbuf->page_len)
3072 return nfserr_resource;
3073 if (!*resp->rqstp->rq_next_page)
3074 return nfserr_resource;
3075
3076 RESERVE_SPACE(NFS4_VERIFIER_SIZE);
3077 savep = p;
3078
3079 /* XXX: Following NFSv3, we ignore the READDIR verifier for now. */
3080 WRITE32(0);
3081 WRITE32(0);
3082 ADJUST_ARGS();
3083 resp->xbuf->head[0].iov_len = ((char*)resp->p) - (char*)resp->xbuf->head[0].iov_base;
3084 tailbase = p;
3085
3086 maxcount = PAGE_SIZE;
3087 if (maxcount > readdir->rd_maxcount)
3088 maxcount = readdir->rd_maxcount;
3089
3090 /*
3091 * Convert from bytes to words, account for the two words already
3092 * written, make sure to leave two words at the end for the next
3093 * pointer and eof field.
3094 */
3095 maxcount = (maxcount >> 2) - 4;
3096 if (maxcount < 0) {
3097 nfserr = nfserr_toosmall;
3098 goto err_no_verf;
3099 }
3100
3101 page = page_address(*(resp->rqstp->rq_next_page++));
3102 readdir->common.err = 0;
3103 readdir->buflen = maxcount;
3104 readdir->buffer = page;
3105 readdir->offset = NULL;
3106
3107 offset = readdir->rd_cookie;
3108 nfserr = nfsd_readdir(readdir->rd_rqstp, readdir->rd_fhp,
3109 &offset,
3110 &readdir->common, nfsd4_encode_dirent);
3111 if (nfserr == nfs_ok &&
3112 readdir->common.err == nfserr_toosmall &&
3113 readdir->buffer == page)
3114 nfserr = nfserr_toosmall;
3115 if (nfserr)
3116 goto err_no_verf;
3117
3118 if (readdir->offset)
3119 xdr_encode_hyper(readdir->offset, offset);
3120
3121 p = readdir->buffer;
3122 *p++ = 0; /* no more entries */
3123 *p++ = htonl(readdir->common.err == nfserr_eof);
3124 resp->xbuf->page_len = ((char*)p) -
3125 (char*)page_address(*(resp->rqstp->rq_next_page-1));
3126
3127 /* Use rest of head for padding and remaining ops: */
3128 resp->xbuf->tail[0].iov_base = tailbase;
3129 resp->xbuf->tail[0].iov_len = 0;
3130 resp->p = resp->xbuf->tail[0].iov_base;
3131 resp->end = resp->p + (PAGE_SIZE - resp->xbuf->head[0].iov_len)/4;
3132
3133 return 0;
3134 err_no_verf:
3135 p = savep;
3136 ADJUST_ARGS();
3137 return nfserr;
3138 }
3139
3140 static __be32
3141 nfsd4_encode_remove(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_remove *remove)
3142 {
3143 __be32 *p;
3144
3145 if (!nfserr) {
3146 RESERVE_SPACE(20);
3147 write_cinfo(&p, &remove->rm_cinfo);
3148 ADJUST_ARGS();
3149 }
3150 return nfserr;
3151 }
3152
3153 static __be32
3154 nfsd4_encode_rename(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_rename *rename)
3155 {
3156 __be32 *p;
3157
3158 if (!nfserr) {
3159 RESERVE_SPACE(40);
3160 write_cinfo(&p, &rename->rn_sinfo);
3161 write_cinfo(&p, &rename->rn_tinfo);
3162 ADJUST_ARGS();
3163 }
3164 return nfserr;
3165 }
3166
3167 static __be32
3168 nfsd4_do_encode_secinfo(struct nfsd4_compoundres *resp,
3169 __be32 nfserr, struct svc_export *exp)
3170 {
3171 u32 i, nflavs, supported;
3172 struct exp_flavor_info *flavs;
3173 struct exp_flavor_info def_flavs[2];
3174 __be32 *p, *flavorsp;
3175 static bool report = true;
3176
3177 if (nfserr)
3178 goto out;
3179 if (exp->ex_nflavors) {
3180 flavs = exp->ex_flavors;
3181 nflavs = exp->ex_nflavors;
3182 } else { /* Handling of some defaults in absence of real secinfo: */
3183 flavs = def_flavs;
3184 if (exp->ex_client->flavour->flavour == RPC_AUTH_UNIX) {
3185 nflavs = 2;
3186 flavs[0].pseudoflavor = RPC_AUTH_UNIX;
3187 flavs[1].pseudoflavor = RPC_AUTH_NULL;
3188 } else if (exp->ex_client->flavour->flavour == RPC_AUTH_GSS) {
3189 nflavs = 1;
3190 flavs[0].pseudoflavor
3191 = svcauth_gss_flavor(exp->ex_client);
3192 } else {
3193 nflavs = 1;
3194 flavs[0].pseudoflavor
3195 = exp->ex_client->flavour->flavour;
3196 }
3197 }
3198
3199 supported = 0;
3200 RESERVE_SPACE(4);
3201 flavorsp = p++; /* to be backfilled later */
3202 ADJUST_ARGS();
3203
3204 for (i = 0; i < nflavs; i++) {
3205 rpc_authflavor_t pf = flavs[i].pseudoflavor;
3206 struct rpcsec_gss_info info;
3207
3208 if (rpcauth_get_gssinfo(pf, &info) == 0) {
3209 supported++;
3210 RESERVE_SPACE(4 + 4 + XDR_LEN(info.oid.len) + 4 + 4);
3211 WRITE32(RPC_AUTH_GSS);
3212 WRITE32(info.oid.len);
3213 WRITEMEM(info.oid.data, info.oid.len);
3214 WRITE32(info.qop);
3215 WRITE32(info.service);
3216 ADJUST_ARGS();
3217 } else if (pf < RPC_AUTH_MAXFLAVOR) {
3218 supported++;
3219 RESERVE_SPACE(4);
3220 WRITE32(pf);
3221 ADJUST_ARGS();
3222 } else {
3223 if (report)
3224 pr_warn("NFS: SECINFO: security flavor %u "
3225 "is not supported\n", pf);
3226 }
3227 }
3228
3229 if (nflavs != supported)
3230 report = false;
3231 *flavorsp = htonl(supported);
3232
3233 out:
3234 if (exp)
3235 exp_put(exp);
3236 return nfserr;
3237 }
3238
3239 static __be32
3240 nfsd4_encode_secinfo(struct nfsd4_compoundres *resp, __be32 nfserr,
3241 struct nfsd4_secinfo *secinfo)
3242 {
3243 return nfsd4_do_encode_secinfo(resp, nfserr, secinfo->si_exp);
3244 }
3245
3246 static __be32
3247 nfsd4_encode_secinfo_no_name(struct nfsd4_compoundres *resp, __be32 nfserr,
3248 struct nfsd4_secinfo_no_name *secinfo)
3249 {
3250 return nfsd4_do_encode_secinfo(resp, nfserr, secinfo->sin_exp);
3251 }
3252
3253 /*
3254 * The SETATTR encode routine is special -- it always encodes a bitmap,
3255 * regardless of the error status.
3256 */
3257 static __be32
3258 nfsd4_encode_setattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setattr *setattr)
3259 {
3260 __be32 *p;
3261
3262 RESERVE_SPACE(16);
3263 if (nfserr) {
3264 WRITE32(3);
3265 WRITE32(0);
3266 WRITE32(0);
3267 WRITE32(0);
3268 }
3269 else {
3270 WRITE32(3);
3271 WRITE32(setattr->sa_bmval[0]);
3272 WRITE32(setattr->sa_bmval[1]);
3273 WRITE32(setattr->sa_bmval[2]);
3274 }
3275 ADJUST_ARGS();
3276 return nfserr;
3277 }
3278
3279 static __be32
3280 nfsd4_encode_setclientid(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setclientid *scd)
3281 {
3282 __be32 *p;
3283
3284 if (!nfserr) {
3285 RESERVE_SPACE(8 + NFS4_VERIFIER_SIZE);
3286 WRITEMEM(&scd->se_clientid, 8);
3287 WRITEMEM(&scd->se_confirm, NFS4_VERIFIER_SIZE);
3288 ADJUST_ARGS();
3289 }
3290 else if (nfserr == nfserr_clid_inuse) {
3291 RESERVE_SPACE(8);
3292 WRITE32(0);
3293 WRITE32(0);
3294 ADJUST_ARGS();
3295 }
3296 return nfserr;
3297 }
3298
3299 static __be32
3300 nfsd4_encode_write(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_write *write)
3301 {
3302 __be32 *p;
3303
3304 if (!nfserr) {
3305 RESERVE_SPACE(16);
3306 WRITE32(write->wr_bytes_written);
3307 WRITE32(write->wr_how_written);
3308 WRITEMEM(write->wr_verifier.data, NFS4_VERIFIER_SIZE);
3309 ADJUST_ARGS();
3310 }
3311 return nfserr;
3312 }
3313
3314 static const u32 nfs4_minimal_spo_must_enforce[2] = {
3315 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) |
3316 1 << (OP_EXCHANGE_ID - 32) |
3317 1 << (OP_CREATE_SESSION - 32) |
3318 1 << (OP_DESTROY_SESSION - 32) |
3319 1 << (OP_DESTROY_CLIENTID - 32)
3320 };
3321
3322 static __be32
3323 nfsd4_encode_exchange_id(struct nfsd4_compoundres *resp, __be32 nfserr,
3324 struct nfsd4_exchange_id *exid)
3325 {
3326 __be32 *p;
3327 char *major_id;
3328 char *server_scope;
3329 int major_id_sz;
3330 int server_scope_sz;
3331 uint64_t minor_id = 0;
3332
3333 if (nfserr)
3334 return nfserr;
3335
3336 major_id = utsname()->nodename;
3337 major_id_sz = strlen(major_id);
3338 server_scope = utsname()->nodename;
3339 server_scope_sz = strlen(server_scope);
3340
3341 RESERVE_SPACE(
3342 8 /* eir_clientid */ +
3343 4 /* eir_sequenceid */ +
3344 4 /* eir_flags */ +
3345 4 /* spr_how */);
3346
3347 WRITEMEM(&exid->clientid, 8);
3348 WRITE32(exid->seqid);
3349 WRITE32(exid->flags);
3350
3351 WRITE32(exid->spa_how);
3352 ADJUST_ARGS();
3353
3354 switch (exid->spa_how) {
3355 case SP4_NONE:
3356 break;
3357 case SP4_MACH_CRED:
3358 /* spo_must_enforce, spo_must_allow */
3359 RESERVE_SPACE(16);
3360
3361 /* spo_must_enforce bitmap: */
3362 WRITE32(2);
3363 WRITE32(nfs4_minimal_spo_must_enforce[0]);
3364 WRITE32(nfs4_minimal_spo_must_enforce[1]);
3365 /* empty spo_must_allow bitmap: */
3366 WRITE32(0);
3367
3368 ADJUST_ARGS();
3369 break;
3370 default:
3371 WARN_ON_ONCE(1);
3372 }
3373
3374 RESERVE_SPACE(
3375 8 /* so_minor_id */ +
3376 4 /* so_major_id.len */ +
3377 (XDR_QUADLEN(major_id_sz) * 4) +
3378 4 /* eir_server_scope.len */ +
3379 (XDR_QUADLEN(server_scope_sz) * 4) +
3380 4 /* eir_server_impl_id.count (0) */);
3381
3382 /* The server_owner struct */
3383 WRITE64(minor_id); /* Minor id */
3384 /* major id */
3385 WRITE32(major_id_sz);
3386 WRITEMEM(major_id, major_id_sz);
3387
3388 /* Server scope */
3389 WRITE32(server_scope_sz);
3390 WRITEMEM(server_scope, server_scope_sz);
3391
3392 /* Implementation id */
3393 WRITE32(0); /* zero length nfs_impl_id4 array */
3394 ADJUST_ARGS();
3395 return 0;
3396 }
3397
3398 static __be32
3399 nfsd4_encode_create_session(struct nfsd4_compoundres *resp, __be32 nfserr,
3400 struct nfsd4_create_session *sess)
3401 {
3402 __be32 *p;
3403
3404 if (nfserr)
3405 return nfserr;
3406
3407 RESERVE_SPACE(24);
3408 WRITEMEM(sess->sessionid.data, NFS4_MAX_SESSIONID_LEN);
3409 WRITE32(sess->seqid);
3410 WRITE32(sess->flags);
3411 ADJUST_ARGS();
3412
3413 RESERVE_SPACE(28);
3414 WRITE32(0); /* headerpadsz */
3415 WRITE32(sess->fore_channel.maxreq_sz);
3416 WRITE32(sess->fore_channel.maxresp_sz);
3417 WRITE32(sess->fore_channel.maxresp_cached);
3418 WRITE32(sess->fore_channel.maxops);
3419 WRITE32(sess->fore_channel.maxreqs);
3420 WRITE32(sess->fore_channel.nr_rdma_attrs);
3421 ADJUST_ARGS();
3422
3423 if (sess->fore_channel.nr_rdma_attrs) {
3424 RESERVE_SPACE(4);
3425 WRITE32(sess->fore_channel.rdma_attrs);
3426 ADJUST_ARGS();
3427 }
3428
3429 RESERVE_SPACE(28);
3430 WRITE32(0); /* headerpadsz */
3431 WRITE32(sess->back_channel.maxreq_sz);
3432 WRITE32(sess->back_channel.maxresp_sz);
3433 WRITE32(sess->back_channel.maxresp_cached);
3434 WRITE32(sess->back_channel.maxops);
3435 WRITE32(sess->back_channel.maxreqs);
3436 WRITE32(sess->back_channel.nr_rdma_attrs);
3437 ADJUST_ARGS();
3438
3439 if (sess->back_channel.nr_rdma_attrs) {
3440 RESERVE_SPACE(4);
3441 WRITE32(sess->back_channel.rdma_attrs);
3442 ADJUST_ARGS();
3443 }
3444 return 0;
3445 }
3446
3447 static __be32
3448 nfsd4_encode_sequence(struct nfsd4_compoundres *resp, __be32 nfserr,
3449 struct nfsd4_sequence *seq)
3450 {
3451 __be32 *p;
3452
3453 if (nfserr)
3454 return nfserr;
3455
3456 RESERVE_SPACE(NFS4_MAX_SESSIONID_LEN + 20);
3457 WRITEMEM(seq->sessionid.data, NFS4_MAX_SESSIONID_LEN);
3458 WRITE32(seq->seqid);
3459 WRITE32(seq->slotid);
3460 /* Note slotid's are numbered from zero: */
3461 WRITE32(seq->maxslots - 1); /* sr_highest_slotid */
3462 WRITE32(seq->maxslots - 1); /* sr_target_highest_slotid */
3463 WRITE32(seq->status_flags);
3464
3465 ADJUST_ARGS();
3466 resp->cstate.datap = p; /* DRC cache data pointer */
3467 return 0;
3468 }
3469
3470 static __be32
3471 nfsd4_encode_test_stateid(struct nfsd4_compoundres *resp, __be32 nfserr,
3472 struct nfsd4_test_stateid *test_stateid)
3473 {
3474 struct nfsd4_test_stateid_id *stateid, *next;
3475 __be32 *p;
3476
3477 if (nfserr)
3478 return nfserr;
3479
3480 RESERVE_SPACE(4 + (4 * test_stateid->ts_num_ids));
3481 *p++ = htonl(test_stateid->ts_num_ids);
3482
3483 list_for_each_entry_safe(stateid, next, &test_stateid->ts_stateid_list, ts_id_list) {
3484 *p++ = stateid->ts_id_status;
3485 }
3486
3487 ADJUST_ARGS();
3488 return nfserr;
3489 }
3490
3491 static __be32
3492 nfsd4_encode_noop(struct nfsd4_compoundres *resp, __be32 nfserr, void *p)
3493 {
3494 return nfserr;
3495 }
3496
3497 typedef __be32(* nfsd4_enc)(struct nfsd4_compoundres *, __be32, void *);
3498
3499 /*
3500 * Note: nfsd4_enc_ops vector is shared for v4.0 and v4.1
3501 * since we don't need to filter out obsolete ops as this is
3502 * done in the decoding phase.
3503 */
3504 static nfsd4_enc nfsd4_enc_ops[] = {
3505 [OP_ACCESS] = (nfsd4_enc)nfsd4_encode_access,
3506 [OP_CLOSE] = (nfsd4_enc)nfsd4_encode_close,
3507 [OP_COMMIT] = (nfsd4_enc)nfsd4_encode_commit,
3508 [OP_CREATE] = (nfsd4_enc)nfsd4_encode_create,
3509 [OP_DELEGPURGE] = (nfsd4_enc)nfsd4_encode_noop,
3510 [OP_DELEGRETURN] = (nfsd4_enc)nfsd4_encode_noop,
3511 [OP_GETATTR] = (nfsd4_enc)nfsd4_encode_getattr,
3512 [OP_GETFH] = (nfsd4_enc)nfsd4_encode_getfh,
3513 [OP_LINK] = (nfsd4_enc)nfsd4_encode_link,
3514 [OP_LOCK] = (nfsd4_enc)nfsd4_encode_lock,
3515 [OP_LOCKT] = (nfsd4_enc)nfsd4_encode_lockt,
3516 [OP_LOCKU] = (nfsd4_enc)nfsd4_encode_locku,
3517 [OP_LOOKUP] = (nfsd4_enc)nfsd4_encode_noop,
3518 [OP_LOOKUPP] = (nfsd4_enc)nfsd4_encode_noop,
3519 [OP_NVERIFY] = (nfsd4_enc)nfsd4_encode_noop,
3520 [OP_OPEN] = (nfsd4_enc)nfsd4_encode_open,
3521 [OP_OPENATTR] = (nfsd4_enc)nfsd4_encode_noop,
3522 [OP_OPEN_CONFIRM] = (nfsd4_enc)nfsd4_encode_open_confirm,
3523 [OP_OPEN_DOWNGRADE] = (nfsd4_enc)nfsd4_encode_open_downgrade,
3524 [OP_PUTFH] = (nfsd4_enc)nfsd4_encode_noop,
3525 [OP_PUTPUBFH] = (nfsd4_enc)nfsd4_encode_noop,
3526 [OP_PUTROOTFH] = (nfsd4_enc)nfsd4_encode_noop,
3527 [OP_READ] = (nfsd4_enc)nfsd4_encode_read,
3528 [OP_READDIR] = (nfsd4_enc)nfsd4_encode_readdir,
3529 [OP_READLINK] = (nfsd4_enc)nfsd4_encode_readlink,
3530 [OP_REMOVE] = (nfsd4_enc)nfsd4_encode_remove,
3531 [OP_RENAME] = (nfsd4_enc)nfsd4_encode_rename,
3532 [OP_RENEW] = (nfsd4_enc)nfsd4_encode_noop,
3533 [OP_RESTOREFH] = (nfsd4_enc)nfsd4_encode_noop,
3534 [OP_SAVEFH] = (nfsd4_enc)nfsd4_encode_noop,
3535 [OP_SECINFO] = (nfsd4_enc)nfsd4_encode_secinfo,
3536 [OP_SETATTR] = (nfsd4_enc)nfsd4_encode_setattr,
3537 [OP_SETCLIENTID] = (nfsd4_enc)nfsd4_encode_setclientid,
3538 [OP_SETCLIENTID_CONFIRM] = (nfsd4_enc)nfsd4_encode_noop,
3539 [OP_VERIFY] = (nfsd4_enc)nfsd4_encode_noop,
3540 [OP_WRITE] = (nfsd4_enc)nfsd4_encode_write,
3541 [OP_RELEASE_LOCKOWNER] = (nfsd4_enc)nfsd4_encode_noop,
3542
3543 /* NFSv4.1 operations */
3544 [OP_BACKCHANNEL_CTL] = (nfsd4_enc)nfsd4_encode_noop,
3545 [OP_BIND_CONN_TO_SESSION] = (nfsd4_enc)nfsd4_encode_bind_conn_to_session,
3546 [OP_EXCHANGE_ID] = (nfsd4_enc)nfsd4_encode_exchange_id,
3547 [OP_CREATE_SESSION] = (nfsd4_enc)nfsd4_encode_create_session,
3548 [OP_DESTROY_SESSION] = (nfsd4_enc)nfsd4_encode_noop,
3549 [OP_FREE_STATEID] = (nfsd4_enc)nfsd4_encode_noop,
3550 [OP_GET_DIR_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop,
3551 [OP_GETDEVICEINFO] = (nfsd4_enc)nfsd4_encode_noop,
3552 [OP_GETDEVICELIST] = (nfsd4_enc)nfsd4_encode_noop,
3553 [OP_LAYOUTCOMMIT] = (nfsd4_enc)nfsd4_encode_noop,
3554 [OP_LAYOUTGET] = (nfsd4_enc)nfsd4_encode_noop,
3555 [OP_LAYOUTRETURN] = (nfsd4_enc)nfsd4_encode_noop,
3556 [OP_SECINFO_NO_NAME] = (nfsd4_enc)nfsd4_encode_secinfo_no_name,
3557 [OP_SEQUENCE] = (nfsd4_enc)nfsd4_encode_sequence,
3558 [OP_SET_SSV] = (nfsd4_enc)nfsd4_encode_noop,
3559 [OP_TEST_STATEID] = (nfsd4_enc)nfsd4_encode_test_stateid,
3560 [OP_WANT_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop,
3561 [OP_DESTROY_CLIENTID] = (nfsd4_enc)nfsd4_encode_noop,
3562 [OP_RECLAIM_COMPLETE] = (nfsd4_enc)nfsd4_encode_noop,
3563 };
3564
3565 /*
3566 * Calculate the total amount of memory that the compound response has taken
3567 * after encoding the current operation with pad.
3568 *
3569 * pad: if operation is non-idempotent, pad was calculate by op_rsize_bop()
3570 * which was specified at nfsd4_operation, else pad is zero.
3571 *
3572 * Compare this length to the session se_fmaxresp_sz and se_fmaxresp_cached.
3573 *
3574 * Our se_fmaxresp_cached will always be a multiple of PAGE_SIZE, and so
3575 * will be at least a page and will therefore hold the xdr_buf head.
3576 */
3577 __be32 nfsd4_check_resp_size(struct nfsd4_compoundres *resp, u32 pad)
3578 {
3579 struct xdr_buf *xb = &resp->rqstp->rq_res;
3580 struct nfsd4_session *session = NULL;
3581 struct nfsd4_slot *slot = resp->cstate.slot;
3582 u32 length, tlen = 0;
3583
3584 if (!nfsd4_has_session(&resp->cstate))
3585 return 0;
3586
3587 session = resp->cstate.session;
3588
3589 if (xb->page_len == 0) {
3590 length = (char *)resp->p - (char *)xb->head[0].iov_base + pad;
3591 } else {
3592 if (xb->tail[0].iov_base && xb->tail[0].iov_len > 0)
3593 tlen = (char *)resp->p - (char *)xb->tail[0].iov_base;
3594
3595 length = xb->head[0].iov_len + xb->page_len + tlen + pad;
3596 }
3597 dprintk("%s length %u, xb->page_len %u tlen %u pad %u\n", __func__,
3598 length, xb->page_len, tlen, pad);
3599
3600 if (length > session->se_fchannel.maxresp_sz)
3601 return nfserr_rep_too_big;
3602
3603 if ((slot->sl_flags & NFSD4_SLOT_CACHETHIS) &&
3604 length > session->se_fchannel.maxresp_cached)
3605 return nfserr_rep_too_big_to_cache;
3606
3607 return 0;
3608 }
3609
3610 void
3611 nfsd4_encode_operation(struct nfsd4_compoundres *resp, struct nfsd4_op *op)
3612 {
3613 struct nfs4_stateowner *so = resp->cstate.replay_owner;
3614 __be32 *statp;
3615 __be32 *p;
3616
3617 RESERVE_SPACE(8);
3618 WRITE32(op->opnum);
3619 statp = p++; /* to be backfilled at the end */
3620 ADJUST_ARGS();
3621
3622 if (op->opnum == OP_ILLEGAL)
3623 goto status;
3624 BUG_ON(op->opnum < 0 || op->opnum >= ARRAY_SIZE(nfsd4_enc_ops) ||
3625 !nfsd4_enc_ops[op->opnum]);
3626 op->status = nfsd4_enc_ops[op->opnum](resp, op->status, &op->u);
3627 /* nfsd4_check_resp_size guarantees enough room for error status */
3628 if (!op->status)
3629 op->status = nfsd4_check_resp_size(resp, 0);
3630 if (op->status == nfserr_resource && nfsd4_has_session(&resp->cstate)) {
3631 struct nfsd4_slot *slot = resp->cstate.slot;
3632
3633 if (slot->sl_flags & NFSD4_SLOT_CACHETHIS)
3634 op->status = nfserr_rep_too_big_to_cache;
3635 else
3636 op->status = nfserr_rep_too_big;
3637 }
3638 if (so) {
3639 so->so_replay.rp_status = op->status;
3640 so->so_replay.rp_buflen = (char *)resp->p - (char *)(statp+1);
3641 memcpy(so->so_replay.rp_buf, statp+1, so->so_replay.rp_buflen);
3642 }
3643 status:
3644 /*
3645 * Note: We write the status directly, instead of using WRITE32(),
3646 * since it is already in network byte order.
3647 */
3648 *statp = op->status;
3649 }
3650
3651 /*
3652 * Encode the reply stored in the stateowner reply cache
3653 *
3654 * XDR note: do not encode rp->rp_buflen: the buffer contains the
3655 * previously sent already encoded operation.
3656 *
3657 * called with nfs4_lock_state() held
3658 */
3659 void
3660 nfsd4_encode_replay(struct nfsd4_compoundres *resp, struct nfsd4_op *op)
3661 {
3662 __be32 *p;
3663 struct nfs4_replay *rp = op->replay;
3664
3665 BUG_ON(!rp);
3666
3667 RESERVE_SPACE(8);
3668 WRITE32(op->opnum);
3669 *p++ = rp->rp_status; /* already xdr'ed */
3670 ADJUST_ARGS();
3671
3672 RESERVE_SPACE(rp->rp_buflen);
3673 WRITEMEM(rp->rp_buf, rp->rp_buflen);
3674 ADJUST_ARGS();
3675 }
3676
3677 int
3678 nfs4svc_encode_voidres(struct svc_rqst *rqstp, __be32 *p, void *dummy)
3679 {
3680 return xdr_ressize_check(rqstp, p);
3681 }
3682
3683 int nfsd4_release_compoundargs(void *rq, __be32 *p, void *resp)
3684 {
3685 struct svc_rqst *rqstp = rq;
3686 struct nfsd4_compoundargs *args = rqstp->rq_argp;
3687
3688 if (args->ops != args->iops) {
3689 kfree(args->ops);
3690 args->ops = args->iops;
3691 }
3692 kfree(args->tmpp);
3693 args->tmpp = NULL;
3694 while (args->to_free) {
3695 struct tmpbuf *tb = args->to_free;
3696 args->to_free = tb->next;
3697 tb->release(tb->buf);
3698 kfree(tb);
3699 }
3700 return 1;
3701 }
3702
3703 int
3704 nfs4svc_decode_compoundargs(struct svc_rqst *rqstp, __be32 *p, struct nfsd4_compoundargs *args)
3705 {
3706 if (rqstp->rq_arg.head[0].iov_len % 4) {
3707 /* client is nuts */
3708 dprintk("%s: compound not properly padded! (peeraddr=%pISc xid=0x%x)",
3709 __func__, svc_addr(rqstp), be32_to_cpu(rqstp->rq_xid));
3710 return 0;
3711 }
3712 args->p = p;
3713 args->end = rqstp->rq_arg.head[0].iov_base + rqstp->rq_arg.head[0].iov_len;
3714 args->pagelist = rqstp->rq_arg.pages;
3715 args->pagelen = rqstp->rq_arg.page_len;
3716 args->tmpp = NULL;
3717 args->to_free = NULL;
3718 args->ops = args->iops;
3719 args->rqstp = rqstp;
3720
3721 return !nfsd4_decode_compound(args);
3722 }
3723
3724 int
3725 nfs4svc_encode_compoundres(struct svc_rqst *rqstp, __be32 *p, struct nfsd4_compoundres *resp)
3726 {
3727 /*
3728 * All that remains is to write the tag and operation count...
3729 */
3730 struct nfsd4_compound_state *cs = &resp->cstate;
3731 struct kvec *iov;
3732 p = resp->tagp;
3733 *p++ = htonl(resp->taglen);
3734 memcpy(p, resp->tag, resp->taglen);
3735 p += XDR_QUADLEN(resp->taglen);
3736 *p++ = htonl(resp->opcnt);
3737
3738 if (rqstp->rq_res.page_len)
3739 iov = &rqstp->rq_res.tail[0];
3740 else
3741 iov = &rqstp->rq_res.head[0];
3742 iov->iov_len = ((char*)resp->p) - (char*)iov->iov_base;
3743 BUG_ON(iov->iov_len > PAGE_SIZE);
3744 if (nfsd4_has_session(cs)) {
3745 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
3746 struct nfs4_client *clp = cs->session->se_client;
3747 if (cs->status != nfserr_replay_cache) {
3748 nfsd4_store_cache_entry(resp);
3749 cs->slot->sl_flags &= ~NFSD4_SLOT_INUSE;
3750 }
3751 /* Renew the clientid on success and on replay */
3752 spin_lock(&nn->client_lock);
3753 nfsd4_put_session(cs->session);
3754 spin_unlock(&nn->client_lock);
3755 put_client_renew(clp);
3756 }
3757 return 1;
3758 }
3759
3760 /*
3761 * Local variables:
3762 * c-basic-offset: 8
3763 * End:
3764 */
Linux kernel - Deliverables
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