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nfsd4: warn on open failure after create
[GitHub/mt8127/android_kernel_alcatel_ttab.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
57 #define NFSDDBG_FACILITY NFSDDBG_XDR
58
59 /*
60 * As per referral draft, the fsid for a referral MUST be different from the fsid of the containing
61 * directory in order to indicate to the client that a filesystem boundary is present
62 * We use a fixed fsid for a referral
63 */
64 #define NFS4_REFERRAL_FSID_MAJOR 0x8000000ULL
65 #define NFS4_REFERRAL_FSID_MINOR 0x8000000ULL
66
67 static __be32
68 check_filename(char *str, int len, __be32 err)
69 {
70 int i;
71
72 if (len == 0)
73 return nfserr_inval;
74 if (isdotent(str, len))
75 return err;
76 for (i = 0; i < len; i++)
77 if (str[i] == '/')
78 return err;
79 return 0;
80 }
81
82 #define DECODE_HEAD \
83 __be32 *p; \
84 __be32 status
85 #define DECODE_TAIL \
86 status = 0; \
87 out: \
88 return status; \
89 xdr_error: \
90 dprintk("NFSD: xdr error (%s:%d)\n", \
91 __FILE__, __LINE__); \
92 status = nfserr_bad_xdr; \
93 goto out
94
95 #define READ32(x) (x) = ntohl(*p++)
96 #define READ64(x) do { \
97 (x) = (u64)ntohl(*p++) << 32; \
98 (x) |= ntohl(*p++); \
99 } while (0)
100 #define READTIME(x) do { \
101 p++; \
102 (x) = ntohl(*p++); \
103 p++; \
104 } while (0)
105 #define READMEM(x,nbytes) do { \
106 x = (char *)p; \
107 p += XDR_QUADLEN(nbytes); \
108 } while (0)
109 #define SAVEMEM(x,nbytes) do { \
110 if (!(x = (p==argp->tmp || p == argp->tmpp) ? \
111 savemem(argp, p, nbytes) : \
112 (char *)p)) { \
113 dprintk("NFSD: xdr error (%s:%d)\n", \
114 __FILE__, __LINE__); \
115 goto xdr_error; \
116 } \
117 p += XDR_QUADLEN(nbytes); \
118 } while (0)
119 #define COPYMEM(x,nbytes) do { \
120 memcpy((x), p, nbytes); \
121 p += XDR_QUADLEN(nbytes); \
122 } while (0)
123
124 /* READ_BUF, read_buf(): nbytes must be <= PAGE_SIZE */
125 #define READ_BUF(nbytes) do { \
126 if (nbytes <= (u32)((char *)argp->end - (char *)argp->p)) { \
127 p = argp->p; \
128 argp->p += XDR_QUADLEN(nbytes); \
129 } else if (!(p = read_buf(argp, nbytes))) { \
130 dprintk("NFSD: xdr error (%s:%d)\n", \
131 __FILE__, __LINE__); \
132 goto xdr_error; \
133 } \
134 } while (0)
135
136 static void save_buf(struct nfsd4_compoundargs *argp, struct nfsd4_saved_compoundargs *savep)
137 {
138 savep->p = argp->p;
139 savep->end = argp->end;
140 savep->pagelen = argp->pagelen;
141 savep->pagelist = argp->pagelist;
142 }
143
144 static void restore_buf(struct nfsd4_compoundargs *argp, struct nfsd4_saved_compoundargs *savep)
145 {
146 argp->p = savep->p;
147 argp->end = savep->end;
148 argp->pagelen = savep->pagelen;
149 argp->pagelist = savep->pagelist;
150 }
151
152 static __be32 *read_buf(struct nfsd4_compoundargs *argp, u32 nbytes)
153 {
154 /* We want more bytes than seem to be available.
155 * Maybe we need a new page, maybe we have just run out
156 */
157 unsigned int avail = (char *)argp->end - (char *)argp->p;
158 __be32 *p;
159 if (avail + argp->pagelen < nbytes)
160 return NULL;
161 if (avail + PAGE_SIZE < nbytes) /* need more than a page !! */
162 return NULL;
163 /* ok, we can do it with the current plus the next page */
164 if (nbytes <= sizeof(argp->tmp))
165 p = argp->tmp;
166 else {
167 kfree(argp->tmpp);
168 p = argp->tmpp = kmalloc(nbytes, GFP_KERNEL);
169 if (!p)
170 return NULL;
171
172 }
173 /*
174 * The following memcpy is safe because read_buf is always
175 * called with nbytes > avail, and the two cases above both
176 * guarantee p points to at least nbytes bytes.
177 */
178 memcpy(p, argp->p, avail);
179 /* step to next page */
180 argp->p = page_address(argp->pagelist[0]);
181 argp->pagelist++;
182 if (argp->pagelen < PAGE_SIZE) {
183 argp->end = argp->p + (argp->pagelen>>2);
184 argp->pagelen = 0;
185 } else {
186 argp->end = argp->p + (PAGE_SIZE>>2);
187 argp->pagelen -= PAGE_SIZE;
188 }
189 memcpy(((char*)p)+avail, argp->p, (nbytes - avail));
190 argp->p += XDR_QUADLEN(nbytes - avail);
191 return p;
192 }
193
194 static int zero_clientid(clientid_t *clid)
195 {
196 return (clid->cl_boot == 0) && (clid->cl_id == 0);
197 }
198
199 static int
200 defer_free(struct nfsd4_compoundargs *argp,
201 void (*release)(const void *), void *p)
202 {
203 struct tmpbuf *tb;
204
205 tb = kmalloc(sizeof(*tb), GFP_KERNEL);
206 if (!tb)
207 return -ENOMEM;
208 tb->buf = p;
209 tb->release = release;
210 tb->next = argp->to_free;
211 argp->to_free = tb;
212 return 0;
213 }
214
215 static char *savemem(struct nfsd4_compoundargs *argp, __be32 *p, int nbytes)
216 {
217 if (p == argp->tmp) {
218 p = kmalloc(nbytes, GFP_KERNEL);
219 if (!p)
220 return NULL;
221 memcpy(p, argp->tmp, nbytes);
222 } else {
223 BUG_ON(p != argp->tmpp);
224 argp->tmpp = NULL;
225 }
226 if (defer_free(argp, kfree, p)) {
227 kfree(p);
228 return NULL;
229 } else
230 return (char *)p;
231 }
232
233 static __be32
234 nfsd4_decode_bitmap(struct nfsd4_compoundargs *argp, u32 *bmval)
235 {
236 u32 bmlen;
237 DECODE_HEAD;
238
239 bmval[0] = 0;
240 bmval[1] = 0;
241 bmval[2] = 0;
242
243 READ_BUF(4);
244 READ32(bmlen);
245 if (bmlen > 1000)
246 goto xdr_error;
247
248 READ_BUF(bmlen << 2);
249 if (bmlen > 0)
250 READ32(bmval[0]);
251 if (bmlen > 1)
252 READ32(bmval[1]);
253 if (bmlen > 2)
254 READ32(bmval[2]);
255
256 DECODE_TAIL;
257 }
258
259 static __be32
260 nfsd4_decode_fattr(struct nfsd4_compoundargs *argp, u32 *bmval,
261 struct iattr *iattr, struct nfs4_acl **acl)
262 {
263 int expected_len, len = 0;
264 u32 dummy32;
265 char *buf;
266 int host_err;
267
268 DECODE_HEAD;
269 iattr->ia_valid = 0;
270 if ((status = nfsd4_decode_bitmap(argp, bmval)))
271 return status;
272
273 READ_BUF(4);
274 READ32(expected_len);
275
276 if (bmval[0] & FATTR4_WORD0_SIZE) {
277 READ_BUF(8);
278 len += 8;
279 READ64(iattr->ia_size);
280 iattr->ia_valid |= ATTR_SIZE;
281 }
282 if (bmval[0] & FATTR4_WORD0_ACL) {
283 int nace;
284 struct nfs4_ace *ace;
285
286 READ_BUF(4); len += 4;
287 READ32(nace);
288
289 if (nace > NFS4_ACL_MAX)
290 return nfserr_resource;
291
292 *acl = nfs4_acl_new(nace);
293 if (*acl == NULL) {
294 host_err = -ENOMEM;
295 goto out_nfserr;
296 }
297 defer_free(argp, kfree, *acl);
298
299 (*acl)->naces = nace;
300 for (ace = (*acl)->aces; ace < (*acl)->aces + nace; ace++) {
301 READ_BUF(16); len += 16;
302 READ32(ace->type);
303 READ32(ace->flag);
304 READ32(ace->access_mask);
305 READ32(dummy32);
306 READ_BUF(dummy32);
307 len += XDR_QUADLEN(dummy32) << 2;
308 READMEM(buf, dummy32);
309 ace->whotype = nfs4_acl_get_whotype(buf, dummy32);
310 status = nfs_ok;
311 if (ace->whotype != NFS4_ACL_WHO_NAMED)
312 ace->who = 0;
313 else if (ace->flag & NFS4_ACE_IDENTIFIER_GROUP)
314 status = nfsd_map_name_to_gid(argp->rqstp,
315 buf, dummy32, &ace->who);
316 else
317 status = nfsd_map_name_to_uid(argp->rqstp,
318 buf, dummy32, &ace->who);
319 if (status)
320 return status;
321 }
322 } else
323 *acl = NULL;
324 if (bmval[1] & FATTR4_WORD1_MODE) {
325 READ_BUF(4);
326 len += 4;
327 READ32(iattr->ia_mode);
328 iattr->ia_mode &= (S_IFMT | S_IALLUGO);
329 iattr->ia_valid |= ATTR_MODE;
330 }
331 if (bmval[1] & FATTR4_WORD1_OWNER) {
332 READ_BUF(4);
333 len += 4;
334 READ32(dummy32);
335 READ_BUF(dummy32);
336 len += (XDR_QUADLEN(dummy32) << 2);
337 READMEM(buf, dummy32);
338 if ((status = nfsd_map_name_to_uid(argp->rqstp, buf, dummy32, &iattr->ia_uid)))
339 return status;
340 iattr->ia_valid |= ATTR_UID;
341 }
342 if (bmval[1] & FATTR4_WORD1_OWNER_GROUP) {
343 READ_BUF(4);
344 len += 4;
345 READ32(dummy32);
346 READ_BUF(dummy32);
347 len += (XDR_QUADLEN(dummy32) << 2);
348 READMEM(buf, dummy32);
349 if ((status = nfsd_map_name_to_gid(argp->rqstp, buf, dummy32, &iattr->ia_gid)))
350 return status;
351 iattr->ia_valid |= ATTR_GID;
352 }
353 if (bmval[1] & FATTR4_WORD1_TIME_ACCESS_SET) {
354 READ_BUF(4);
355 len += 4;
356 READ32(dummy32);
357 switch (dummy32) {
358 case NFS4_SET_TO_CLIENT_TIME:
359 /* We require the high 32 bits of 'seconds' to be 0, and we ignore
360 all 32 bits of 'nseconds'. */
361 READ_BUF(12);
362 len += 12;
363 READ32(dummy32);
364 if (dummy32)
365 return nfserr_inval;
366 READ32(iattr->ia_atime.tv_sec);
367 READ32(iattr->ia_atime.tv_nsec);
368 if (iattr->ia_atime.tv_nsec >= (u32)1000000000)
369 return nfserr_inval;
370 iattr->ia_valid |= (ATTR_ATIME | ATTR_ATIME_SET);
371 break;
372 case NFS4_SET_TO_SERVER_TIME:
373 iattr->ia_valid |= ATTR_ATIME;
374 break;
375 default:
376 goto xdr_error;
377 }
378 }
379 if (bmval[1] & FATTR4_WORD1_TIME_MODIFY_SET) {
380 READ_BUF(4);
381 len += 4;
382 READ32(dummy32);
383 switch (dummy32) {
384 case NFS4_SET_TO_CLIENT_TIME:
385 /* We require the high 32 bits of 'seconds' to be 0, and we ignore
386 all 32 bits of 'nseconds'. */
387 READ_BUF(12);
388 len += 12;
389 READ32(dummy32);
390 if (dummy32)
391 return nfserr_inval;
392 READ32(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 if (bmval[0] & ~NFSD_WRITEABLE_ATTRS_WORD0
406 || bmval[1] & ~NFSD_WRITEABLE_ATTRS_WORD1
407 || bmval[2] & ~NFSD_WRITEABLE_ATTRS_WORD2)
408 READ_BUF(expected_len - len);
409 else if (len != expected_len)
410 goto xdr_error;
411
412 DECODE_TAIL;
413
414 out_nfserr:
415 status = nfserrno(host_err);
416 goto out;
417 }
418
419 static __be32
420 nfsd4_decode_stateid(struct nfsd4_compoundargs *argp, stateid_t *sid)
421 {
422 DECODE_HEAD;
423
424 READ_BUF(sizeof(stateid_t));
425 READ32(sid->si_generation);
426 COPYMEM(&sid->si_opaque, sizeof(stateid_opaque_t));
427
428 DECODE_TAIL;
429 }
430
431 static __be32
432 nfsd4_decode_access(struct nfsd4_compoundargs *argp, struct nfsd4_access *access)
433 {
434 DECODE_HEAD;
435
436 READ_BUF(4);
437 READ32(access->ac_req_access);
438
439 DECODE_TAIL;
440 }
441
442 static __be32 nfsd4_decode_bind_conn_to_session(struct nfsd4_compoundargs *argp, struct nfsd4_bind_conn_to_session *bcts)
443 {
444 DECODE_HEAD;
445
446 READ_BUF(NFS4_MAX_SESSIONID_LEN + 8);
447 COPYMEM(bcts->sessionid.data, NFS4_MAX_SESSIONID_LEN);
448 READ32(bcts->dir);
449 /* XXX: skipping ctsa_use_conn_in_rdma_mode. Perhaps Tom Tucker
450 * could help us figure out we should be using it. */
451 DECODE_TAIL;
452 }
453
454 static __be32
455 nfsd4_decode_close(struct nfsd4_compoundargs *argp, struct nfsd4_close *close)
456 {
457 DECODE_HEAD;
458
459 READ_BUF(4);
460 READ32(close->cl_seqid);
461 return nfsd4_decode_stateid(argp, &close->cl_stateid);
462
463 DECODE_TAIL;
464 }
465
466
467 static __be32
468 nfsd4_decode_commit(struct nfsd4_compoundargs *argp, struct nfsd4_commit *commit)
469 {
470 DECODE_HEAD;
471
472 READ_BUF(12);
473 READ64(commit->co_offset);
474 READ32(commit->co_count);
475
476 DECODE_TAIL;
477 }
478
479 static __be32
480 nfsd4_decode_create(struct nfsd4_compoundargs *argp, struct nfsd4_create *create)
481 {
482 DECODE_HEAD;
483
484 READ_BUF(4);
485 READ32(create->cr_type);
486 switch (create->cr_type) {
487 case NF4LNK:
488 READ_BUF(4);
489 READ32(create->cr_linklen);
490 READ_BUF(create->cr_linklen);
491 SAVEMEM(create->cr_linkname, create->cr_linklen);
492 break;
493 case NF4BLK:
494 case NF4CHR:
495 READ_BUF(8);
496 READ32(create->cr_specdata1);
497 READ32(create->cr_specdata2);
498 break;
499 case NF4SOCK:
500 case NF4FIFO:
501 case NF4DIR:
502 default:
503 break;
504 }
505
506 READ_BUF(4);
507 READ32(create->cr_namelen);
508 READ_BUF(create->cr_namelen);
509 SAVEMEM(create->cr_name, create->cr_namelen);
510 if ((status = check_filename(create->cr_name, create->cr_namelen, nfserr_inval)))
511 return status;
512
513 status = nfsd4_decode_fattr(argp, create->cr_bmval, &create->cr_iattr,
514 &create->cr_acl);
515 if (status)
516 goto out;
517
518 DECODE_TAIL;
519 }
520
521 static inline __be32
522 nfsd4_decode_delegreturn(struct nfsd4_compoundargs *argp, struct nfsd4_delegreturn *dr)
523 {
524 return nfsd4_decode_stateid(argp, &dr->dr_stateid);
525 }
526
527 static inline __be32
528 nfsd4_decode_getattr(struct nfsd4_compoundargs *argp, struct nfsd4_getattr *getattr)
529 {
530 return nfsd4_decode_bitmap(argp, getattr->ga_bmval);
531 }
532
533 static __be32
534 nfsd4_decode_link(struct nfsd4_compoundargs *argp, struct nfsd4_link *link)
535 {
536 DECODE_HEAD;
537
538 READ_BUF(4);
539 READ32(link->li_namelen);
540 READ_BUF(link->li_namelen);
541 SAVEMEM(link->li_name, link->li_namelen);
542 if ((status = check_filename(link->li_name, link->li_namelen, nfserr_inval)))
543 return status;
544
545 DECODE_TAIL;
546 }
547
548 static __be32
549 nfsd4_decode_lock(struct nfsd4_compoundargs *argp, struct nfsd4_lock *lock)
550 {
551 DECODE_HEAD;
552
553 /*
554 * type, reclaim(boolean), offset, length, new_lock_owner(boolean)
555 */
556 READ_BUF(28);
557 READ32(lock->lk_type);
558 if ((lock->lk_type < NFS4_READ_LT) || (lock->lk_type > NFS4_WRITEW_LT))
559 goto xdr_error;
560 READ32(lock->lk_reclaim);
561 READ64(lock->lk_offset);
562 READ64(lock->lk_length);
563 READ32(lock->lk_is_new);
564
565 if (lock->lk_is_new) {
566 READ_BUF(4);
567 READ32(lock->lk_new_open_seqid);
568 status = nfsd4_decode_stateid(argp, &lock->lk_new_open_stateid);
569 if (status)
570 return status;
571 READ_BUF(8 + sizeof(clientid_t));
572 READ32(lock->lk_new_lock_seqid);
573 COPYMEM(&lock->lk_new_clientid, sizeof(clientid_t));
574 READ32(lock->lk_new_owner.len);
575 READ_BUF(lock->lk_new_owner.len);
576 READMEM(lock->lk_new_owner.data, lock->lk_new_owner.len);
577 } else {
578 status = nfsd4_decode_stateid(argp, &lock->lk_old_lock_stateid);
579 if (status)
580 return status;
581 READ_BUF(4);
582 READ32(lock->lk_old_lock_seqid);
583 }
584
585 DECODE_TAIL;
586 }
587
588 static __be32
589 nfsd4_decode_lockt(struct nfsd4_compoundargs *argp, struct nfsd4_lockt *lockt)
590 {
591 DECODE_HEAD;
592
593 READ_BUF(32);
594 READ32(lockt->lt_type);
595 if((lockt->lt_type < NFS4_READ_LT) || (lockt->lt_type > NFS4_WRITEW_LT))
596 goto xdr_error;
597 READ64(lockt->lt_offset);
598 READ64(lockt->lt_length);
599 COPYMEM(&lockt->lt_clientid, 8);
600 READ32(lockt->lt_owner.len);
601 READ_BUF(lockt->lt_owner.len);
602 READMEM(lockt->lt_owner.data, lockt->lt_owner.len);
603
604 DECODE_TAIL;
605 }
606
607 static __be32
608 nfsd4_decode_locku(struct nfsd4_compoundargs *argp, struct nfsd4_locku *locku)
609 {
610 DECODE_HEAD;
611
612 READ_BUF(8);
613 READ32(locku->lu_type);
614 if ((locku->lu_type < NFS4_READ_LT) || (locku->lu_type > NFS4_WRITEW_LT))
615 goto xdr_error;
616 READ32(locku->lu_seqid);
617 status = nfsd4_decode_stateid(argp, &locku->lu_stateid);
618 if (status)
619 return status;
620 READ_BUF(16);
621 READ64(locku->lu_offset);
622 READ64(locku->lu_length);
623
624 DECODE_TAIL;
625 }
626
627 static __be32
628 nfsd4_decode_lookup(struct nfsd4_compoundargs *argp, struct nfsd4_lookup *lookup)
629 {
630 DECODE_HEAD;
631
632 READ_BUF(4);
633 READ32(lookup->lo_len);
634 READ_BUF(lookup->lo_len);
635 SAVEMEM(lookup->lo_name, lookup->lo_len);
636 if ((status = check_filename(lookup->lo_name, lookup->lo_len, nfserr_noent)))
637 return status;
638
639 DECODE_TAIL;
640 }
641
642 static __be32 nfsd4_decode_share_access(struct nfsd4_compoundargs *argp, u32 *x)
643 {
644 __be32 *p;
645 u32 w;
646
647 READ_BUF(4);
648 READ32(w);
649 *x = w;
650 switch (w & NFS4_SHARE_ACCESS_MASK) {
651 case NFS4_SHARE_ACCESS_READ:
652 case NFS4_SHARE_ACCESS_WRITE:
653 case NFS4_SHARE_ACCESS_BOTH:
654 break;
655 default:
656 return nfserr_bad_xdr;
657 }
658 w &= !NFS4_SHARE_ACCESS_MASK;
659 if (!w)
660 return nfs_ok;
661 if (!argp->minorversion)
662 return nfserr_bad_xdr;
663 switch (w & NFS4_SHARE_WANT_MASK) {
664 case NFS4_SHARE_WANT_NO_PREFERENCE:
665 case NFS4_SHARE_WANT_READ_DELEG:
666 case NFS4_SHARE_WANT_WRITE_DELEG:
667 case NFS4_SHARE_WANT_ANY_DELEG:
668 case NFS4_SHARE_WANT_NO_DELEG:
669 case NFS4_SHARE_WANT_CANCEL:
670 break;
671 default:
672 return nfserr_bad_xdr;
673 }
674 w &= !NFS4_SHARE_WANT_MASK;
675 if (!w)
676 return nfs_ok;
677 switch (w) {
678 case NFS4_SHARE_SIGNAL_DELEG_WHEN_RESRC_AVAIL:
679 case NFS4_SHARE_PUSH_DELEG_WHEN_UNCONTENDED:
680 return nfs_ok;
681 }
682 xdr_error:
683 return nfserr_bad_xdr;
684 }
685
686 static __be32 nfsd4_decode_share_deny(struct nfsd4_compoundargs *argp, u32 *x)
687 {
688 __be32 *p;
689
690 READ_BUF(4);
691 READ32(*x);
692 /* Note: unlinke access bits, deny bits may be zero. */
693 if (*x & ~NFS4_SHARE_DENY_BOTH)
694 return nfserr_bad_xdr;
695 return nfs_ok;
696 xdr_error:
697 return nfserr_bad_xdr;
698 }
699
700 static __be32 nfsd4_decode_opaque(struct nfsd4_compoundargs *argp, struct xdr_netobj *o)
701 {
702 __be32 *p;
703
704 READ_BUF(4);
705 READ32(o->len);
706
707 if (o->len == 0 || o->len > NFS4_OPAQUE_LIMIT)
708 return nfserr_bad_xdr;
709
710 READ_BUF(o->len);
711 SAVEMEM(o->data, o->len);
712 return nfs_ok;
713 xdr_error:
714 return nfserr_bad_xdr;
715 }
716
717 static __be32
718 nfsd4_decode_open(struct nfsd4_compoundargs *argp, struct nfsd4_open *open)
719 {
720 DECODE_HEAD;
721
722 memset(open->op_bmval, 0, sizeof(open->op_bmval));
723 open->op_iattr.ia_valid = 0;
724 open->op_openowner = NULL;
725
726 /* seqid, share_access, share_deny, clientid, ownerlen */
727 READ_BUF(4);
728 READ32(open->op_seqid);
729 status = nfsd4_decode_share_access(argp, &open->op_share_access);
730 if (status)
731 goto xdr_error;
732 status = nfsd4_decode_share_deny(argp, &open->op_share_deny);
733 if (status)
734 goto xdr_error;
735 READ_BUF(sizeof(clientid_t));
736 COPYMEM(&open->op_clientid, sizeof(clientid_t));
737 status = nfsd4_decode_opaque(argp, &open->op_owner);
738 if (status)
739 goto xdr_error;
740 READ_BUF(4);
741 READ32(open->op_create);
742 switch (open->op_create) {
743 case NFS4_OPEN_NOCREATE:
744 break;
745 case NFS4_OPEN_CREATE:
746 READ_BUF(4);
747 READ32(open->op_createmode);
748 switch (open->op_createmode) {
749 case NFS4_CREATE_UNCHECKED:
750 case NFS4_CREATE_GUARDED:
751 status = nfsd4_decode_fattr(argp, open->op_bmval,
752 &open->op_iattr, &open->op_acl);
753 if (status)
754 goto out;
755 break;
756 case NFS4_CREATE_EXCLUSIVE:
757 READ_BUF(8);
758 COPYMEM(open->op_verf.data, 8);
759 break;
760 case NFS4_CREATE_EXCLUSIVE4_1:
761 if (argp->minorversion < 1)
762 goto xdr_error;
763 READ_BUF(8);
764 COPYMEM(open->op_verf.data, 8);
765 status = nfsd4_decode_fattr(argp, open->op_bmval,
766 &open->op_iattr, &open->op_acl);
767 if (status)
768 goto out;
769 break;
770 default:
771 goto xdr_error;
772 }
773 break;
774 default:
775 goto xdr_error;
776 }
777
778 /* open_claim */
779 READ_BUF(4);
780 READ32(open->op_claim_type);
781 switch (open->op_claim_type) {
782 case NFS4_OPEN_CLAIM_NULL:
783 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
784 READ_BUF(4);
785 READ32(open->op_fname.len);
786 READ_BUF(open->op_fname.len);
787 SAVEMEM(open->op_fname.data, open->op_fname.len);
788 if ((status = check_filename(open->op_fname.data, open->op_fname.len, nfserr_inval)))
789 return status;
790 break;
791 case NFS4_OPEN_CLAIM_PREVIOUS:
792 READ_BUF(4);
793 READ32(open->op_delegate_type);
794 break;
795 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
796 status = nfsd4_decode_stateid(argp, &open->op_delegate_stateid);
797 if (status)
798 return status;
799 READ_BUF(4);
800 READ32(open->op_fname.len);
801 READ_BUF(open->op_fname.len);
802 SAVEMEM(open->op_fname.data, open->op_fname.len);
803 if ((status = check_filename(open->op_fname.data, open->op_fname.len, nfserr_inval)))
804 return status;
805 break;
806 default:
807 goto xdr_error;
808 }
809
810 DECODE_TAIL;
811 }
812
813 static __be32
814 nfsd4_decode_open_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_open_confirm *open_conf)
815 {
816 DECODE_HEAD;
817
818 status = nfsd4_decode_stateid(argp, &open_conf->oc_req_stateid);
819 if (status)
820 return status;
821 READ_BUF(4);
822 READ32(open_conf->oc_seqid);
823
824 DECODE_TAIL;
825 }
826
827 static __be32
828 nfsd4_decode_open_downgrade(struct nfsd4_compoundargs *argp, struct nfsd4_open_downgrade *open_down)
829 {
830 DECODE_HEAD;
831
832 status = nfsd4_decode_stateid(argp, &open_down->od_stateid);
833 if (status)
834 return status;
835 READ_BUF(4);
836 READ32(open_down->od_seqid);
837 status = nfsd4_decode_share_access(argp, &open_down->od_share_access);
838 if (status)
839 return status;
840 status = nfsd4_decode_share_deny(argp, &open_down->od_share_deny);
841 if (status)
842 return status;
843 DECODE_TAIL;
844 }
845
846 static __be32
847 nfsd4_decode_putfh(struct nfsd4_compoundargs *argp, struct nfsd4_putfh *putfh)
848 {
849 DECODE_HEAD;
850
851 READ_BUF(4);
852 READ32(putfh->pf_fhlen);
853 if (putfh->pf_fhlen > NFS4_FHSIZE)
854 goto xdr_error;
855 READ_BUF(putfh->pf_fhlen);
856 SAVEMEM(putfh->pf_fhval, putfh->pf_fhlen);
857
858 DECODE_TAIL;
859 }
860
861 static __be32
862 nfsd4_decode_read(struct nfsd4_compoundargs *argp, struct nfsd4_read *read)
863 {
864 DECODE_HEAD;
865
866 status = nfsd4_decode_stateid(argp, &read->rd_stateid);
867 if (status)
868 return status;
869 READ_BUF(12);
870 READ64(read->rd_offset);
871 READ32(read->rd_length);
872
873 DECODE_TAIL;
874 }
875
876 static __be32
877 nfsd4_decode_readdir(struct nfsd4_compoundargs *argp, struct nfsd4_readdir *readdir)
878 {
879 DECODE_HEAD;
880
881 READ_BUF(24);
882 READ64(readdir->rd_cookie);
883 COPYMEM(readdir->rd_verf.data, sizeof(readdir->rd_verf.data));
884 READ32(readdir->rd_dircount); /* just in case you needed a useless field... */
885 READ32(readdir->rd_maxcount);
886 if ((status = nfsd4_decode_bitmap(argp, readdir->rd_bmval)))
887 goto out;
888
889 DECODE_TAIL;
890 }
891
892 static __be32
893 nfsd4_decode_remove(struct nfsd4_compoundargs *argp, struct nfsd4_remove *remove)
894 {
895 DECODE_HEAD;
896
897 READ_BUF(4);
898 READ32(remove->rm_namelen);
899 READ_BUF(remove->rm_namelen);
900 SAVEMEM(remove->rm_name, remove->rm_namelen);
901 if ((status = check_filename(remove->rm_name, remove->rm_namelen, nfserr_noent)))
902 return status;
903
904 DECODE_TAIL;
905 }
906
907 static __be32
908 nfsd4_decode_rename(struct nfsd4_compoundargs *argp, struct nfsd4_rename *rename)
909 {
910 DECODE_HEAD;
911
912 READ_BUF(4);
913 READ32(rename->rn_snamelen);
914 READ_BUF(rename->rn_snamelen + 4);
915 SAVEMEM(rename->rn_sname, rename->rn_snamelen);
916 READ32(rename->rn_tnamelen);
917 READ_BUF(rename->rn_tnamelen);
918 SAVEMEM(rename->rn_tname, rename->rn_tnamelen);
919 if ((status = check_filename(rename->rn_sname, rename->rn_snamelen, nfserr_noent)))
920 return status;
921 if ((status = check_filename(rename->rn_tname, rename->rn_tnamelen, nfserr_inval)))
922 return status;
923
924 DECODE_TAIL;
925 }
926
927 static __be32
928 nfsd4_decode_renew(struct nfsd4_compoundargs *argp, clientid_t *clientid)
929 {
930 DECODE_HEAD;
931
932 READ_BUF(sizeof(clientid_t));
933 COPYMEM(clientid, sizeof(clientid_t));
934
935 DECODE_TAIL;
936 }
937
938 static __be32
939 nfsd4_decode_secinfo(struct nfsd4_compoundargs *argp,
940 struct nfsd4_secinfo *secinfo)
941 {
942 DECODE_HEAD;
943
944 READ_BUF(4);
945 READ32(secinfo->si_namelen);
946 READ_BUF(secinfo->si_namelen);
947 SAVEMEM(secinfo->si_name, secinfo->si_namelen);
948 status = check_filename(secinfo->si_name, secinfo->si_namelen,
949 nfserr_noent);
950 if (status)
951 return status;
952 DECODE_TAIL;
953 }
954
955 static __be32
956 nfsd4_decode_secinfo_no_name(struct nfsd4_compoundargs *argp,
957 struct nfsd4_secinfo_no_name *sin)
958 {
959 DECODE_HEAD;
960
961 READ_BUF(4);
962 READ32(sin->sin_style);
963 DECODE_TAIL;
964 }
965
966 static __be32
967 nfsd4_decode_setattr(struct nfsd4_compoundargs *argp, struct nfsd4_setattr *setattr)
968 {
969 __be32 status;
970
971 status = nfsd4_decode_stateid(argp, &setattr->sa_stateid);
972 if (status)
973 return status;
974 return nfsd4_decode_fattr(argp, setattr->sa_bmval, &setattr->sa_iattr,
975 &setattr->sa_acl);
976 }
977
978 static __be32
979 nfsd4_decode_setclientid(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid *setclientid)
980 {
981 DECODE_HEAD;
982
983 READ_BUF(8);
984 COPYMEM(setclientid->se_verf.data, 8);
985
986 status = nfsd4_decode_opaque(argp, &setclientid->se_name);
987 if (status)
988 return nfserr_bad_xdr;
989 READ_BUF(8);
990 READ32(setclientid->se_callback_prog);
991 READ32(setclientid->se_callback_netid_len);
992
993 READ_BUF(setclientid->se_callback_netid_len + 4);
994 SAVEMEM(setclientid->se_callback_netid_val, setclientid->se_callback_netid_len);
995 READ32(setclientid->se_callback_addr_len);
996
997 READ_BUF(setclientid->se_callback_addr_len + 4);
998 SAVEMEM(setclientid->se_callback_addr_val, setclientid->se_callback_addr_len);
999 READ32(setclientid->se_callback_ident);
1000
1001 DECODE_TAIL;
1002 }
1003
1004 static __be32
1005 nfsd4_decode_setclientid_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid_confirm *scd_c)
1006 {
1007 DECODE_HEAD;
1008
1009 READ_BUF(8 + sizeof(nfs4_verifier));
1010 COPYMEM(&scd_c->sc_clientid, 8);
1011 COPYMEM(&scd_c->sc_confirm, sizeof(nfs4_verifier));
1012
1013 DECODE_TAIL;
1014 }
1015
1016 /* Also used for NVERIFY */
1017 static __be32
1018 nfsd4_decode_verify(struct nfsd4_compoundargs *argp, struct nfsd4_verify *verify)
1019 {
1020 #if 0
1021 struct nfsd4_compoundargs save = {
1022 .p = argp->p,
1023 .end = argp->end,
1024 .rqstp = argp->rqstp,
1025 };
1026 u32 ve_bmval[2];
1027 struct iattr ve_iattr; /* request */
1028 struct nfs4_acl *ve_acl; /* request */
1029 #endif
1030 DECODE_HEAD;
1031
1032 if ((status = nfsd4_decode_bitmap(argp, verify->ve_bmval)))
1033 goto out;
1034
1035 /* For convenience's sake, we compare raw xdr'd attributes in
1036 * nfsd4_proc_verify; however we still decode here just to return
1037 * correct error in case of bad xdr. */
1038 #if 0
1039 status = nfsd4_decode_fattr(ve_bmval, &ve_iattr, &ve_acl);
1040 if (status == nfserr_inval) {
1041 status = nfserrno(status);
1042 goto out;
1043 }
1044 #endif
1045 READ_BUF(4);
1046 READ32(verify->ve_attrlen);
1047 READ_BUF(verify->ve_attrlen);
1048 SAVEMEM(verify->ve_attrval, verify->ve_attrlen);
1049
1050 DECODE_TAIL;
1051 }
1052
1053 static __be32
1054 nfsd4_decode_write(struct nfsd4_compoundargs *argp, struct nfsd4_write *write)
1055 {
1056 int avail;
1057 int v;
1058 int len;
1059 DECODE_HEAD;
1060
1061 status = nfsd4_decode_stateid(argp, &write->wr_stateid);
1062 if (status)
1063 return status;
1064 READ_BUF(16);
1065 READ64(write->wr_offset);
1066 READ32(write->wr_stable_how);
1067 if (write->wr_stable_how > 2)
1068 goto xdr_error;
1069 READ32(write->wr_buflen);
1070
1071 /* Sorry .. no magic macros for this.. *
1072 * READ_BUF(write->wr_buflen);
1073 * SAVEMEM(write->wr_buf, write->wr_buflen);
1074 */
1075 avail = (char*)argp->end - (char*)argp->p;
1076 if (avail + argp->pagelen < write->wr_buflen) {
1077 dprintk("NFSD: xdr error (%s:%d)\n",
1078 __FILE__, __LINE__);
1079 goto xdr_error;
1080 }
1081 argp->rqstp->rq_vec[0].iov_base = p;
1082 argp->rqstp->rq_vec[0].iov_len = avail;
1083 v = 0;
1084 len = write->wr_buflen;
1085 while (len > argp->rqstp->rq_vec[v].iov_len) {
1086 len -= argp->rqstp->rq_vec[v].iov_len;
1087 v++;
1088 argp->rqstp->rq_vec[v].iov_base = page_address(argp->pagelist[0]);
1089 argp->pagelist++;
1090 if (argp->pagelen >= PAGE_SIZE) {
1091 argp->rqstp->rq_vec[v].iov_len = PAGE_SIZE;
1092 argp->pagelen -= PAGE_SIZE;
1093 } else {
1094 argp->rqstp->rq_vec[v].iov_len = argp->pagelen;
1095 argp->pagelen -= len;
1096 }
1097 }
1098 argp->end = (__be32*) (argp->rqstp->rq_vec[v].iov_base + argp->rqstp->rq_vec[v].iov_len);
1099 argp->p = (__be32*) (argp->rqstp->rq_vec[v].iov_base + (XDR_QUADLEN(len) << 2));
1100 argp->rqstp->rq_vec[v].iov_len = len;
1101 write->wr_vlen = v+1;
1102
1103 DECODE_TAIL;
1104 }
1105
1106 static __be32
1107 nfsd4_decode_release_lockowner(struct nfsd4_compoundargs *argp, struct nfsd4_release_lockowner *rlockowner)
1108 {
1109 DECODE_HEAD;
1110
1111 READ_BUF(12);
1112 COPYMEM(&rlockowner->rl_clientid, sizeof(clientid_t));
1113 READ32(rlockowner->rl_owner.len);
1114 READ_BUF(rlockowner->rl_owner.len);
1115 READMEM(rlockowner->rl_owner.data, rlockowner->rl_owner.len);
1116
1117 if (argp->minorversion && !zero_clientid(&rlockowner->rl_clientid))
1118 return nfserr_inval;
1119 DECODE_TAIL;
1120 }
1121
1122 static __be32
1123 nfsd4_decode_exchange_id(struct nfsd4_compoundargs *argp,
1124 struct nfsd4_exchange_id *exid)
1125 {
1126 int dummy, tmp;
1127 DECODE_HEAD;
1128
1129 READ_BUF(NFS4_VERIFIER_SIZE);
1130 COPYMEM(exid->verifier.data, NFS4_VERIFIER_SIZE);
1131
1132 status = nfsd4_decode_opaque(argp, &exid->clname);
1133 if (status)
1134 return nfserr_bad_xdr;
1135
1136 READ_BUF(4);
1137 READ32(exid->flags);
1138
1139 /* Ignore state_protect4_a */
1140 READ_BUF(4);
1141 READ32(exid->spa_how);
1142 switch (exid->spa_how) {
1143 case SP4_NONE:
1144 break;
1145 case SP4_MACH_CRED:
1146 /* spo_must_enforce */
1147 READ_BUF(4);
1148 READ32(dummy);
1149 READ_BUF(dummy * 4);
1150 p += dummy;
1151
1152 /* spo_must_allow */
1153 READ_BUF(4);
1154 READ32(dummy);
1155 READ_BUF(dummy * 4);
1156 p += dummy;
1157 break;
1158 case SP4_SSV:
1159 /* ssp_ops */
1160 READ_BUF(4);
1161 READ32(dummy);
1162 READ_BUF(dummy * 4);
1163 p += dummy;
1164
1165 READ_BUF(4);
1166 READ32(dummy);
1167 READ_BUF(dummy * 4);
1168 p += dummy;
1169
1170 /* ssp_hash_algs<> */
1171 READ_BUF(4);
1172 READ32(tmp);
1173 while (tmp--) {
1174 READ_BUF(4);
1175 READ32(dummy);
1176 READ_BUF(dummy);
1177 p += XDR_QUADLEN(dummy);
1178 }
1179
1180 /* ssp_encr_algs<> */
1181 READ_BUF(4);
1182 READ32(tmp);
1183 while (tmp--) {
1184 READ_BUF(4);
1185 READ32(dummy);
1186 READ_BUF(dummy);
1187 p += XDR_QUADLEN(dummy);
1188 }
1189
1190 /* ssp_window and ssp_num_gss_handles */
1191 READ_BUF(8);
1192 READ32(dummy);
1193 READ32(dummy);
1194 break;
1195 default:
1196 goto xdr_error;
1197 }
1198
1199 /* Ignore Implementation ID */
1200 READ_BUF(4); /* nfs_impl_id4 array length */
1201 READ32(dummy);
1202
1203 if (dummy > 1)
1204 goto xdr_error;
1205
1206 if (dummy == 1) {
1207 /* nii_domain */
1208 READ_BUF(4);
1209 READ32(dummy);
1210 READ_BUF(dummy);
1211 p += XDR_QUADLEN(dummy);
1212
1213 /* nii_name */
1214 READ_BUF(4);
1215 READ32(dummy);
1216 READ_BUF(dummy);
1217 p += XDR_QUADLEN(dummy);
1218
1219 /* nii_date */
1220 READ_BUF(12);
1221 p += 3;
1222 }
1223 DECODE_TAIL;
1224 }
1225
1226 static __be32
1227 nfsd4_decode_create_session(struct nfsd4_compoundargs *argp,
1228 struct nfsd4_create_session *sess)
1229 {
1230 DECODE_HEAD;
1231
1232 u32 dummy;
1233 char *machine_name;
1234 int i;
1235 int nr_secflavs;
1236
1237 READ_BUF(16);
1238 COPYMEM(&sess->clientid, 8);
1239 READ32(sess->seqid);
1240 READ32(sess->flags);
1241
1242 /* Fore channel attrs */
1243 READ_BUF(28);
1244 READ32(dummy); /* headerpadsz is always 0 */
1245 READ32(sess->fore_channel.maxreq_sz);
1246 READ32(sess->fore_channel.maxresp_sz);
1247 READ32(sess->fore_channel.maxresp_cached);
1248 READ32(sess->fore_channel.maxops);
1249 READ32(sess->fore_channel.maxreqs);
1250 READ32(sess->fore_channel.nr_rdma_attrs);
1251 if (sess->fore_channel.nr_rdma_attrs == 1) {
1252 READ_BUF(4);
1253 READ32(sess->fore_channel.rdma_attrs);
1254 } else if (sess->fore_channel.nr_rdma_attrs > 1) {
1255 dprintk("Too many fore channel attr bitmaps!\n");
1256 goto xdr_error;
1257 }
1258
1259 /* Back channel attrs */
1260 READ_BUF(28);
1261 READ32(dummy); /* headerpadsz is always 0 */
1262 READ32(sess->back_channel.maxreq_sz);
1263 READ32(sess->back_channel.maxresp_sz);
1264 READ32(sess->back_channel.maxresp_cached);
1265 READ32(sess->back_channel.maxops);
1266 READ32(sess->back_channel.maxreqs);
1267 READ32(sess->back_channel.nr_rdma_attrs);
1268 if (sess->back_channel.nr_rdma_attrs == 1) {
1269 READ_BUF(4);
1270 READ32(sess->back_channel.rdma_attrs);
1271 } else if (sess->back_channel.nr_rdma_attrs > 1) {
1272 dprintk("Too many back channel attr bitmaps!\n");
1273 goto xdr_error;
1274 }
1275
1276 READ_BUF(8);
1277 READ32(sess->callback_prog);
1278
1279 /* callback_sec_params4 */
1280 READ32(nr_secflavs);
1281 for (i = 0; i < nr_secflavs; ++i) {
1282 READ_BUF(4);
1283 READ32(dummy);
1284 switch (dummy) {
1285 case RPC_AUTH_NULL:
1286 /* Nothing to read */
1287 break;
1288 case RPC_AUTH_UNIX:
1289 READ_BUF(8);
1290 /* stamp */
1291 READ32(dummy);
1292
1293 /* machine name */
1294 READ32(dummy);
1295 READ_BUF(dummy);
1296 SAVEMEM(machine_name, dummy);
1297
1298 /* uid, gid */
1299 READ_BUF(8);
1300 READ32(sess->uid);
1301 READ32(sess->gid);
1302
1303 /* more gids */
1304 READ_BUF(4);
1305 READ32(dummy);
1306 READ_BUF(dummy * 4);
1307 break;
1308 case RPC_AUTH_GSS:
1309 dprintk("RPC_AUTH_GSS callback secflavor "
1310 "not supported!\n");
1311 READ_BUF(8);
1312 /* gcbp_service */
1313 READ32(dummy);
1314 /* gcbp_handle_from_server */
1315 READ32(dummy);
1316 READ_BUF(dummy);
1317 p += XDR_QUADLEN(dummy);
1318 /* gcbp_handle_from_client */
1319 READ_BUF(4);
1320 READ32(dummy);
1321 READ_BUF(dummy);
1322 break;
1323 default:
1324 dprintk("Illegal callback secflavor\n");
1325 return nfserr_inval;
1326 }
1327 }
1328 DECODE_TAIL;
1329 }
1330
1331 static __be32
1332 nfsd4_decode_destroy_session(struct nfsd4_compoundargs *argp,
1333 struct nfsd4_destroy_session *destroy_session)
1334 {
1335 DECODE_HEAD;
1336 READ_BUF(NFS4_MAX_SESSIONID_LEN);
1337 COPYMEM(destroy_session->sessionid.data, NFS4_MAX_SESSIONID_LEN);
1338
1339 DECODE_TAIL;
1340 }
1341
1342 static __be32
1343 nfsd4_decode_free_stateid(struct nfsd4_compoundargs *argp,
1344 struct nfsd4_free_stateid *free_stateid)
1345 {
1346 DECODE_HEAD;
1347
1348 READ_BUF(sizeof(stateid_t));
1349 READ32(free_stateid->fr_stateid.si_generation);
1350 COPYMEM(&free_stateid->fr_stateid.si_opaque, sizeof(stateid_opaque_t));
1351
1352 DECODE_TAIL;
1353 }
1354
1355 static __be32
1356 nfsd4_decode_sequence(struct nfsd4_compoundargs *argp,
1357 struct nfsd4_sequence *seq)
1358 {
1359 DECODE_HEAD;
1360
1361 READ_BUF(NFS4_MAX_SESSIONID_LEN + 16);
1362 COPYMEM(seq->sessionid.data, NFS4_MAX_SESSIONID_LEN);
1363 READ32(seq->seqid);
1364 READ32(seq->slotid);
1365 READ32(seq->maxslots);
1366 READ32(seq->cachethis);
1367
1368 DECODE_TAIL;
1369 }
1370
1371 static __be32
1372 nfsd4_decode_test_stateid(struct nfsd4_compoundargs *argp, struct nfsd4_test_stateid *test_stateid)
1373 {
1374 unsigned int nbytes;
1375 stateid_t si;
1376 int i;
1377 __be32 *p;
1378 __be32 status;
1379
1380 READ_BUF(4);
1381 test_stateid->ts_num_ids = ntohl(*p++);
1382
1383 nbytes = test_stateid->ts_num_ids * sizeof(stateid_t);
1384 if (nbytes > (u32)((char *)argp->end - (char *)argp->p))
1385 goto xdr_error;
1386
1387 test_stateid->ts_saved_args = argp;
1388 save_buf(argp, &test_stateid->ts_savedp);
1389
1390 for (i = 0; i < test_stateid->ts_num_ids; i++) {
1391 status = nfsd4_decode_stateid(argp, &si);
1392 if (status)
1393 return status;
1394 }
1395
1396 status = 0;
1397 out:
1398 return status;
1399 xdr_error:
1400 dprintk("NFSD: xdr error (%s:%d)\n", __FILE__, __LINE__);
1401 status = nfserr_bad_xdr;
1402 goto out;
1403 }
1404
1405 static __be32 nfsd4_decode_reclaim_complete(struct nfsd4_compoundargs *argp, struct nfsd4_reclaim_complete *rc)
1406 {
1407 DECODE_HEAD;
1408
1409 READ_BUF(4);
1410 READ32(rc->rca_one_fs);
1411
1412 DECODE_TAIL;
1413 }
1414
1415 static __be32
1416 nfsd4_decode_noop(struct nfsd4_compoundargs *argp, void *p)
1417 {
1418 return nfs_ok;
1419 }
1420
1421 static __be32
1422 nfsd4_decode_notsupp(struct nfsd4_compoundargs *argp, void *p)
1423 {
1424 return nfserr_notsupp;
1425 }
1426
1427 typedef __be32(*nfsd4_dec)(struct nfsd4_compoundargs *argp, void *);
1428
1429 static nfsd4_dec nfsd4_dec_ops[] = {
1430 [OP_ACCESS] = (nfsd4_dec)nfsd4_decode_access,
1431 [OP_CLOSE] = (nfsd4_dec)nfsd4_decode_close,
1432 [OP_COMMIT] = (nfsd4_dec)nfsd4_decode_commit,
1433 [OP_CREATE] = (nfsd4_dec)nfsd4_decode_create,
1434 [OP_DELEGPURGE] = (nfsd4_dec)nfsd4_decode_notsupp,
1435 [OP_DELEGRETURN] = (nfsd4_dec)nfsd4_decode_delegreturn,
1436 [OP_GETATTR] = (nfsd4_dec)nfsd4_decode_getattr,
1437 [OP_GETFH] = (nfsd4_dec)nfsd4_decode_noop,
1438 [OP_LINK] = (nfsd4_dec)nfsd4_decode_link,
1439 [OP_LOCK] = (nfsd4_dec)nfsd4_decode_lock,
1440 [OP_LOCKT] = (nfsd4_dec)nfsd4_decode_lockt,
1441 [OP_LOCKU] = (nfsd4_dec)nfsd4_decode_locku,
1442 [OP_LOOKUP] = (nfsd4_dec)nfsd4_decode_lookup,
1443 [OP_LOOKUPP] = (nfsd4_dec)nfsd4_decode_noop,
1444 [OP_NVERIFY] = (nfsd4_dec)nfsd4_decode_verify,
1445 [OP_OPEN] = (nfsd4_dec)nfsd4_decode_open,
1446 [OP_OPENATTR] = (nfsd4_dec)nfsd4_decode_notsupp,
1447 [OP_OPEN_CONFIRM] = (nfsd4_dec)nfsd4_decode_open_confirm,
1448 [OP_OPEN_DOWNGRADE] = (nfsd4_dec)nfsd4_decode_open_downgrade,
1449 [OP_PUTFH] = (nfsd4_dec)nfsd4_decode_putfh,
1450 [OP_PUTPUBFH] = (nfsd4_dec)nfsd4_decode_noop,
1451 [OP_PUTROOTFH] = (nfsd4_dec)nfsd4_decode_noop,
1452 [OP_READ] = (nfsd4_dec)nfsd4_decode_read,
1453 [OP_READDIR] = (nfsd4_dec)nfsd4_decode_readdir,
1454 [OP_READLINK] = (nfsd4_dec)nfsd4_decode_noop,
1455 [OP_REMOVE] = (nfsd4_dec)nfsd4_decode_remove,
1456 [OP_RENAME] = (nfsd4_dec)nfsd4_decode_rename,
1457 [OP_RENEW] = (nfsd4_dec)nfsd4_decode_renew,
1458 [OP_RESTOREFH] = (nfsd4_dec)nfsd4_decode_noop,
1459 [OP_SAVEFH] = (nfsd4_dec)nfsd4_decode_noop,
1460 [OP_SECINFO] = (nfsd4_dec)nfsd4_decode_secinfo,
1461 [OP_SETATTR] = (nfsd4_dec)nfsd4_decode_setattr,
1462 [OP_SETCLIENTID] = (nfsd4_dec)nfsd4_decode_setclientid,
1463 [OP_SETCLIENTID_CONFIRM] = (nfsd4_dec)nfsd4_decode_setclientid_confirm,
1464 [OP_VERIFY] = (nfsd4_dec)nfsd4_decode_verify,
1465 [OP_WRITE] = (nfsd4_dec)nfsd4_decode_write,
1466 [OP_RELEASE_LOCKOWNER] = (nfsd4_dec)nfsd4_decode_release_lockowner,
1467 };
1468
1469 static nfsd4_dec nfsd41_dec_ops[] = {
1470 [OP_ACCESS] = (nfsd4_dec)nfsd4_decode_access,
1471 [OP_CLOSE] = (nfsd4_dec)nfsd4_decode_close,
1472 [OP_COMMIT] = (nfsd4_dec)nfsd4_decode_commit,
1473 [OP_CREATE] = (nfsd4_dec)nfsd4_decode_create,
1474 [OP_DELEGPURGE] = (nfsd4_dec)nfsd4_decode_notsupp,
1475 [OP_DELEGRETURN] = (nfsd4_dec)nfsd4_decode_delegreturn,
1476 [OP_GETATTR] = (nfsd4_dec)nfsd4_decode_getattr,
1477 [OP_GETFH] = (nfsd4_dec)nfsd4_decode_noop,
1478 [OP_LINK] = (nfsd4_dec)nfsd4_decode_link,
1479 [OP_LOCK] = (nfsd4_dec)nfsd4_decode_lock,
1480 [OP_LOCKT] = (nfsd4_dec)nfsd4_decode_lockt,
1481 [OP_LOCKU] = (nfsd4_dec)nfsd4_decode_locku,
1482 [OP_LOOKUP] = (nfsd4_dec)nfsd4_decode_lookup,
1483 [OP_LOOKUPP] = (nfsd4_dec)nfsd4_decode_noop,
1484 [OP_NVERIFY] = (nfsd4_dec)nfsd4_decode_verify,
1485 [OP_OPEN] = (nfsd4_dec)nfsd4_decode_open,
1486 [OP_OPENATTR] = (nfsd4_dec)nfsd4_decode_notsupp,
1487 [OP_OPEN_CONFIRM] = (nfsd4_dec)nfsd4_decode_notsupp,
1488 [OP_OPEN_DOWNGRADE] = (nfsd4_dec)nfsd4_decode_open_downgrade,
1489 [OP_PUTFH] = (nfsd4_dec)nfsd4_decode_putfh,
1490 [OP_PUTPUBFH] = (nfsd4_dec)nfsd4_decode_notsupp,
1491 [OP_PUTROOTFH] = (nfsd4_dec)nfsd4_decode_noop,
1492 [OP_READ] = (nfsd4_dec)nfsd4_decode_read,
1493 [OP_READDIR] = (nfsd4_dec)nfsd4_decode_readdir,
1494 [OP_READLINK] = (nfsd4_dec)nfsd4_decode_noop,
1495 [OP_REMOVE] = (nfsd4_dec)nfsd4_decode_remove,
1496 [OP_RENAME] = (nfsd4_dec)nfsd4_decode_rename,
1497 [OP_RENEW] = (nfsd4_dec)nfsd4_decode_notsupp,
1498 [OP_RESTOREFH] = (nfsd4_dec)nfsd4_decode_noop,
1499 [OP_SAVEFH] = (nfsd4_dec)nfsd4_decode_noop,
1500 [OP_SECINFO] = (nfsd4_dec)nfsd4_decode_secinfo,
1501 [OP_SETATTR] = (nfsd4_dec)nfsd4_decode_setattr,
1502 [OP_SETCLIENTID] = (nfsd4_dec)nfsd4_decode_notsupp,
1503 [OP_SETCLIENTID_CONFIRM]= (nfsd4_dec)nfsd4_decode_notsupp,
1504 [OP_VERIFY] = (nfsd4_dec)nfsd4_decode_verify,
1505 [OP_WRITE] = (nfsd4_dec)nfsd4_decode_write,
1506 [OP_RELEASE_LOCKOWNER] = (nfsd4_dec)nfsd4_decode_notsupp,
1507
1508 /* new operations for NFSv4.1 */
1509 [OP_BACKCHANNEL_CTL] = (nfsd4_dec)nfsd4_decode_notsupp,
1510 [OP_BIND_CONN_TO_SESSION]= (nfsd4_dec)nfsd4_decode_bind_conn_to_session,
1511 [OP_EXCHANGE_ID] = (nfsd4_dec)nfsd4_decode_exchange_id,
1512 [OP_CREATE_SESSION] = (nfsd4_dec)nfsd4_decode_create_session,
1513 [OP_DESTROY_SESSION] = (nfsd4_dec)nfsd4_decode_destroy_session,
1514 [OP_FREE_STATEID] = (nfsd4_dec)nfsd4_decode_free_stateid,
1515 [OP_GET_DIR_DELEGATION] = (nfsd4_dec)nfsd4_decode_notsupp,
1516 [OP_GETDEVICEINFO] = (nfsd4_dec)nfsd4_decode_notsupp,
1517 [OP_GETDEVICELIST] = (nfsd4_dec)nfsd4_decode_notsupp,
1518 [OP_LAYOUTCOMMIT] = (nfsd4_dec)nfsd4_decode_notsupp,
1519 [OP_LAYOUTGET] = (nfsd4_dec)nfsd4_decode_notsupp,
1520 [OP_LAYOUTRETURN] = (nfsd4_dec)nfsd4_decode_notsupp,
1521 [OP_SECINFO_NO_NAME] = (nfsd4_dec)nfsd4_decode_secinfo_no_name,
1522 [OP_SEQUENCE] = (nfsd4_dec)nfsd4_decode_sequence,
1523 [OP_SET_SSV] = (nfsd4_dec)nfsd4_decode_notsupp,
1524 [OP_TEST_STATEID] = (nfsd4_dec)nfsd4_decode_test_stateid,
1525 [OP_WANT_DELEGATION] = (nfsd4_dec)nfsd4_decode_notsupp,
1526 [OP_DESTROY_CLIENTID] = (nfsd4_dec)nfsd4_decode_notsupp,
1527 [OP_RECLAIM_COMPLETE] = (nfsd4_dec)nfsd4_decode_reclaim_complete,
1528 };
1529
1530 struct nfsd4_minorversion_ops {
1531 nfsd4_dec *decoders;
1532 int nops;
1533 };
1534
1535 static struct nfsd4_minorversion_ops nfsd4_minorversion[] = {
1536 [0] = { nfsd4_dec_ops, ARRAY_SIZE(nfsd4_dec_ops) },
1537 [1] = { nfsd41_dec_ops, ARRAY_SIZE(nfsd41_dec_ops) },
1538 };
1539
1540 static __be32
1541 nfsd4_decode_compound(struct nfsd4_compoundargs *argp)
1542 {
1543 DECODE_HEAD;
1544 struct nfsd4_op *op;
1545 struct nfsd4_minorversion_ops *ops;
1546 bool cachethis = false;
1547 int i;
1548
1549 /*
1550 * XXX: According to spec, we should check the tag
1551 * for UTF-8 compliance. I'm postponing this for
1552 * now because it seems that some clients do use
1553 * binary tags.
1554 */
1555 READ_BUF(4);
1556 READ32(argp->taglen);
1557 READ_BUF(argp->taglen + 8);
1558 SAVEMEM(argp->tag, argp->taglen);
1559 READ32(argp->minorversion);
1560 READ32(argp->opcnt);
1561
1562 if (argp->taglen > NFSD4_MAX_TAGLEN)
1563 goto xdr_error;
1564 if (argp->opcnt > 100)
1565 goto xdr_error;
1566
1567 if (argp->opcnt > ARRAY_SIZE(argp->iops)) {
1568 argp->ops = kmalloc(argp->opcnt * sizeof(*argp->ops), GFP_KERNEL);
1569 if (!argp->ops) {
1570 argp->ops = argp->iops;
1571 dprintk("nfsd: couldn't allocate room for COMPOUND\n");
1572 goto xdr_error;
1573 }
1574 }
1575
1576 if (argp->minorversion >= ARRAY_SIZE(nfsd4_minorversion))
1577 argp->opcnt = 0;
1578
1579 ops = &nfsd4_minorversion[argp->minorversion];
1580 for (i = 0; i < argp->opcnt; i++) {
1581 op = &argp->ops[i];
1582 op->replay = NULL;
1583
1584 /*
1585 * We can't use READ_BUF() here because we need to handle
1586 * a missing opcode as an OP_WRITE + 1. So we need to check
1587 * to see if we're truly at the end of our buffer or if there
1588 * is another page we need to flip to.
1589 */
1590
1591 if (argp->p == argp->end) {
1592 if (argp->pagelen < 4) {
1593 /* There isn't an opcode still on the wire */
1594 op->opnum = OP_WRITE + 1;
1595 op->status = nfserr_bad_xdr;
1596 argp->opcnt = i+1;
1597 break;
1598 }
1599
1600 /*
1601 * False alarm. We just hit a page boundary, but there
1602 * is still data available. Move pointer across page
1603 * boundary. *snip from READ_BUF*
1604 */
1605 argp->p = page_address(argp->pagelist[0]);
1606 argp->pagelist++;
1607 if (argp->pagelen < PAGE_SIZE) {
1608 argp->end = argp->p + (argp->pagelen>>2);
1609 argp->pagelen = 0;
1610 } else {
1611 argp->end = argp->p + (PAGE_SIZE>>2);
1612 argp->pagelen -= PAGE_SIZE;
1613 }
1614 }
1615 op->opnum = ntohl(*argp->p++);
1616
1617 if (op->opnum >= FIRST_NFS4_OP && op->opnum <= LAST_NFS4_OP)
1618 op->status = ops->decoders[op->opnum](argp, &op->u);
1619 else {
1620 op->opnum = OP_ILLEGAL;
1621 op->status = nfserr_op_illegal;
1622 }
1623
1624 if (op->status) {
1625 argp->opcnt = i+1;
1626 break;
1627 }
1628 /*
1629 * We'll try to cache the result in the DRC if any one
1630 * op in the compound wants to be cached:
1631 */
1632 cachethis |= nfsd4_cache_this_op(op);
1633 }
1634 /* Sessions make the DRC unnecessary: */
1635 if (argp->minorversion)
1636 cachethis = false;
1637 argp->rqstp->rq_cachetype = cachethis ? RC_REPLBUFF : RC_NOCACHE;
1638
1639 DECODE_TAIL;
1640 }
1641
1642 #define WRITE32(n) *p++ = htonl(n)
1643 #define WRITE64(n) do { \
1644 *p++ = htonl((u32)((n) >> 32)); \
1645 *p++ = htonl((u32)(n)); \
1646 } while (0)
1647 #define WRITEMEM(ptr,nbytes) do { if (nbytes > 0) { \
1648 *(p + XDR_QUADLEN(nbytes) -1) = 0; \
1649 memcpy(p, ptr, nbytes); \
1650 p += XDR_QUADLEN(nbytes); \
1651 }} while (0)
1652
1653 static void write32(__be32 **p, u32 n)
1654 {
1655 *(*p)++ = n;
1656 }
1657
1658 static void write64(__be32 **p, u64 n)
1659 {
1660 write32(p, (u32)(n >> 32));
1661 write32(p, (u32)n);
1662 }
1663
1664 static void write_change(__be32 **p, struct kstat *stat, struct inode *inode)
1665 {
1666 if (IS_I_VERSION(inode)) {
1667 write64(p, inode->i_version);
1668 } else {
1669 write32(p, stat->ctime.tv_sec);
1670 write32(p, stat->ctime.tv_nsec);
1671 }
1672 }
1673
1674 static void write_cinfo(__be32 **p, struct nfsd4_change_info *c)
1675 {
1676 write32(p, c->atomic);
1677 if (c->change_supported) {
1678 write64(p, c->before_change);
1679 write64(p, c->after_change);
1680 } else {
1681 write32(p, c->before_ctime_sec);
1682 write32(p, c->before_ctime_nsec);
1683 write32(p, c->after_ctime_sec);
1684 write32(p, c->after_ctime_nsec);
1685 }
1686 }
1687
1688 #define RESERVE_SPACE(nbytes) do { \
1689 p = resp->p; \
1690 BUG_ON(p + XDR_QUADLEN(nbytes) > resp->end); \
1691 } while (0)
1692 #define ADJUST_ARGS() resp->p = p
1693
1694 /*
1695 * Header routine to setup seqid operation replay cache
1696 */
1697 #define ENCODE_SEQID_OP_HEAD \
1698 __be32 *save; \
1699 \
1700 save = resp->p;
1701
1702 /*
1703 * Routine for encoding the result of a "seqid-mutating" NFSv4 operation. This
1704 * is where sequence id's are incremented, and the replay cache is filled.
1705 * Note that we increment sequence id's here, at the last moment, so we're sure
1706 * we know whether the error to be returned is a sequence id mutating error.
1707 */
1708
1709 static void encode_seqid_op_tail(struct nfsd4_compoundres *resp, __be32 *save, __be32 nfserr)
1710 {
1711 struct nfs4_stateowner *stateowner = resp->cstate.replay_owner;
1712
1713 if (seqid_mutating_err(ntohl(nfserr)) && stateowner) {
1714 stateowner->so_seqid++;
1715 stateowner->so_replay.rp_status = nfserr;
1716 stateowner->so_replay.rp_buflen =
1717 (char *)resp->p - (char *)save;
1718 memcpy(stateowner->so_replay.rp_buf, save,
1719 stateowner->so_replay.rp_buflen);
1720 nfsd4_purge_closed_stateid(stateowner);
1721 }
1722 }
1723
1724 /* Encode as an array of strings the string given with components
1725 * separated @sep.
1726 */
1727 static __be32 nfsd4_encode_components(char sep, char *components,
1728 __be32 **pp, int *buflen)
1729 {
1730 __be32 *p = *pp;
1731 __be32 *countp = p;
1732 int strlen, count=0;
1733 char *str, *end;
1734
1735 dprintk("nfsd4_encode_components(%s)\n", components);
1736 if ((*buflen -= 4) < 0)
1737 return nfserr_resource;
1738 WRITE32(0); /* We will fill this in with @count later */
1739 end = str = components;
1740 while (*end) {
1741 for (; *end && (*end != sep); end++)
1742 ; /* Point to end of component */
1743 strlen = end - str;
1744 if (strlen) {
1745 if ((*buflen -= ((XDR_QUADLEN(strlen) << 2) + 4)) < 0)
1746 return nfserr_resource;
1747 WRITE32(strlen);
1748 WRITEMEM(str, strlen);
1749 count++;
1750 }
1751 else
1752 end++;
1753 str = end;
1754 }
1755 *pp = p;
1756 p = countp;
1757 WRITE32(count);
1758 return 0;
1759 }
1760
1761 /*
1762 * encode a location element of a fs_locations structure
1763 */
1764 static __be32 nfsd4_encode_fs_location4(struct nfsd4_fs_location *location,
1765 __be32 **pp, int *buflen)
1766 {
1767 __be32 status;
1768 __be32 *p = *pp;
1769
1770 status = nfsd4_encode_components(':', location->hosts, &p, buflen);
1771 if (status)
1772 return status;
1773 status = nfsd4_encode_components('/', location->path, &p, buflen);
1774 if (status)
1775 return status;
1776 *pp = p;
1777 return 0;
1778 }
1779
1780 /*
1781 * Encode a path in RFC3530 'pathname4' format
1782 */
1783 static __be32 nfsd4_encode_path(const struct path *root,
1784 const struct path *path, __be32 **pp, int *buflen)
1785 {
1786 struct path cur = {
1787 .mnt = path->mnt,
1788 .dentry = path->dentry,
1789 };
1790 __be32 *p = *pp;
1791 struct dentry **components = NULL;
1792 unsigned int ncomponents = 0;
1793 __be32 err = nfserr_jukebox;
1794
1795 dprintk("nfsd4_encode_components(");
1796
1797 path_get(&cur);
1798 /* First walk the path up to the nfsd root, and store the
1799 * dentries/path components in an array.
1800 */
1801 for (;;) {
1802 if (cur.dentry == root->dentry && cur.mnt == root->mnt)
1803 break;
1804 if (cur.dentry == cur.mnt->mnt_root) {
1805 if (follow_up(&cur))
1806 continue;
1807 goto out_free;
1808 }
1809 if ((ncomponents & 15) == 0) {
1810 struct dentry **new;
1811 new = krealloc(components,
1812 sizeof(*new) * (ncomponents + 16),
1813 GFP_KERNEL);
1814 if (!new)
1815 goto out_free;
1816 components = new;
1817 }
1818 components[ncomponents++] = cur.dentry;
1819 cur.dentry = dget_parent(cur.dentry);
1820 }
1821
1822 *buflen -= 4;
1823 if (*buflen < 0)
1824 goto out_free;
1825 WRITE32(ncomponents);
1826
1827 while (ncomponents) {
1828 struct dentry *dentry = components[ncomponents - 1];
1829 unsigned int len = dentry->d_name.len;
1830
1831 *buflen -= 4 + (XDR_QUADLEN(len) << 2);
1832 if (*buflen < 0)
1833 goto out_free;
1834 WRITE32(len);
1835 WRITEMEM(dentry->d_name.name, len);
1836 dprintk("/%s", dentry->d_name.name);
1837 dput(dentry);
1838 ncomponents--;
1839 }
1840
1841 *pp = p;
1842 err = 0;
1843 out_free:
1844 dprintk(")\n");
1845 while (ncomponents)
1846 dput(components[--ncomponents]);
1847 kfree(components);
1848 path_put(&cur);
1849 return err;
1850 }
1851
1852 static __be32 nfsd4_encode_fsloc_fsroot(struct svc_rqst *rqstp,
1853 const struct path *path, __be32 **pp, int *buflen)
1854 {
1855 struct svc_export *exp_ps;
1856 __be32 res;
1857
1858 exp_ps = rqst_find_fsidzero_export(rqstp);
1859 if (IS_ERR(exp_ps))
1860 return nfserrno(PTR_ERR(exp_ps));
1861 res = nfsd4_encode_path(&exp_ps->ex_path, path, pp, buflen);
1862 exp_put(exp_ps);
1863 return res;
1864 }
1865
1866 /*
1867 * encode a fs_locations structure
1868 */
1869 static __be32 nfsd4_encode_fs_locations(struct svc_rqst *rqstp,
1870 struct svc_export *exp,
1871 __be32 **pp, int *buflen)
1872 {
1873 __be32 status;
1874 int i;
1875 __be32 *p = *pp;
1876 struct nfsd4_fs_locations *fslocs = &exp->ex_fslocs;
1877
1878 status = nfsd4_encode_fsloc_fsroot(rqstp, &exp->ex_path, &p, buflen);
1879 if (status)
1880 return status;
1881 if ((*buflen -= 4) < 0)
1882 return nfserr_resource;
1883 WRITE32(fslocs->locations_count);
1884 for (i=0; i<fslocs->locations_count; i++) {
1885 status = nfsd4_encode_fs_location4(&fslocs->locations[i],
1886 &p, buflen);
1887 if (status)
1888 return status;
1889 }
1890 *pp = p;
1891 return 0;
1892 }
1893
1894 static u32 nfs4_file_type(umode_t mode)
1895 {
1896 switch (mode & S_IFMT) {
1897 case S_IFIFO: return NF4FIFO;
1898 case S_IFCHR: return NF4CHR;
1899 case S_IFDIR: return NF4DIR;
1900 case S_IFBLK: return NF4BLK;
1901 case S_IFLNK: return NF4LNK;
1902 case S_IFREG: return NF4REG;
1903 case S_IFSOCK: return NF4SOCK;
1904 default: return NF4BAD;
1905 };
1906 }
1907
1908 static __be32
1909 nfsd4_encode_name(struct svc_rqst *rqstp, int whotype, uid_t id, int group,
1910 __be32 **p, int *buflen)
1911 {
1912 int status;
1913
1914 if (*buflen < (XDR_QUADLEN(IDMAP_NAMESZ) << 2) + 4)
1915 return nfserr_resource;
1916 if (whotype != NFS4_ACL_WHO_NAMED)
1917 status = nfs4_acl_write_who(whotype, (u8 *)(*p + 1));
1918 else if (group)
1919 status = nfsd_map_gid_to_name(rqstp, id, (u8 *)(*p + 1));
1920 else
1921 status = nfsd_map_uid_to_name(rqstp, id, (u8 *)(*p + 1));
1922 if (status < 0)
1923 return nfserrno(status);
1924 *p = xdr_encode_opaque(*p, NULL, status);
1925 *buflen -= (XDR_QUADLEN(status) << 2) + 4;
1926 BUG_ON(*buflen < 0);
1927 return 0;
1928 }
1929
1930 static inline __be32
1931 nfsd4_encode_user(struct svc_rqst *rqstp, uid_t uid, __be32 **p, int *buflen)
1932 {
1933 return nfsd4_encode_name(rqstp, NFS4_ACL_WHO_NAMED, uid, 0, p, buflen);
1934 }
1935
1936 static inline __be32
1937 nfsd4_encode_group(struct svc_rqst *rqstp, uid_t gid, __be32 **p, int *buflen)
1938 {
1939 return nfsd4_encode_name(rqstp, NFS4_ACL_WHO_NAMED, gid, 1, p, buflen);
1940 }
1941
1942 static inline __be32
1943 nfsd4_encode_aclname(struct svc_rqst *rqstp, int whotype, uid_t id, int group,
1944 __be32 **p, int *buflen)
1945 {
1946 return nfsd4_encode_name(rqstp, whotype, id, group, p, buflen);
1947 }
1948
1949 #define WORD0_ABSENT_FS_ATTRS (FATTR4_WORD0_FS_LOCATIONS | FATTR4_WORD0_FSID | \
1950 FATTR4_WORD0_RDATTR_ERROR)
1951 #define WORD1_ABSENT_FS_ATTRS FATTR4_WORD1_MOUNTED_ON_FILEID
1952
1953 static __be32 fattr_handle_absent_fs(u32 *bmval0, u32 *bmval1, u32 *rdattr_err)
1954 {
1955 /* As per referral draft: */
1956 if (*bmval0 & ~WORD0_ABSENT_FS_ATTRS ||
1957 *bmval1 & ~WORD1_ABSENT_FS_ATTRS) {
1958 if (*bmval0 & FATTR4_WORD0_RDATTR_ERROR ||
1959 *bmval0 & FATTR4_WORD0_FS_LOCATIONS)
1960 *rdattr_err = NFSERR_MOVED;
1961 else
1962 return nfserr_moved;
1963 }
1964 *bmval0 &= WORD0_ABSENT_FS_ATTRS;
1965 *bmval1 &= WORD1_ABSENT_FS_ATTRS;
1966 return 0;
1967 }
1968
1969 /*
1970 * Note: @fhp can be NULL; in this case, we might have to compose the filehandle
1971 * ourselves.
1972 *
1973 * @countp is the buffer size in _words_; upon successful return this becomes
1974 * replaced with the number of words written.
1975 */
1976 __be32
1977 nfsd4_encode_fattr(struct svc_fh *fhp, struct svc_export *exp,
1978 struct dentry *dentry, __be32 *buffer, int *countp, u32 *bmval,
1979 struct svc_rqst *rqstp, int ignore_crossmnt)
1980 {
1981 u32 bmval0 = bmval[0];
1982 u32 bmval1 = bmval[1];
1983 u32 bmval2 = bmval[2];
1984 struct kstat stat;
1985 struct svc_fh tempfh;
1986 struct kstatfs statfs;
1987 int buflen = *countp << 2;
1988 __be32 *attrlenp;
1989 u32 dummy;
1990 u64 dummy64;
1991 u32 rdattr_err = 0;
1992 __be32 *p = buffer;
1993 __be32 status;
1994 int err;
1995 int aclsupport = 0;
1996 struct nfs4_acl *acl = NULL;
1997 struct nfsd4_compoundres *resp = rqstp->rq_resp;
1998 u32 minorversion = resp->cstate.minorversion;
1999 struct path path = {
2000 .mnt = exp->ex_path.mnt,
2001 .dentry = dentry,
2002 };
2003
2004 BUG_ON(bmval1 & NFSD_WRITEONLY_ATTRS_WORD1);
2005 BUG_ON(bmval0 & ~nfsd_suppattrs0(minorversion));
2006 BUG_ON(bmval1 & ~nfsd_suppattrs1(minorversion));
2007 BUG_ON(bmval2 & ~nfsd_suppattrs2(minorversion));
2008
2009 if (exp->ex_fslocs.migrated) {
2010 BUG_ON(bmval[2]);
2011 status = fattr_handle_absent_fs(&bmval0, &bmval1, &rdattr_err);
2012 if (status)
2013 goto out;
2014 }
2015
2016 err = vfs_getattr(exp->ex_path.mnt, dentry, &stat);
2017 if (err)
2018 goto out_nfserr;
2019 if ((bmval0 & (FATTR4_WORD0_FILES_FREE | FATTR4_WORD0_FILES_TOTAL |
2020 FATTR4_WORD0_MAXNAME)) ||
2021 (bmval1 & (FATTR4_WORD1_SPACE_AVAIL | FATTR4_WORD1_SPACE_FREE |
2022 FATTR4_WORD1_SPACE_TOTAL))) {
2023 err = vfs_statfs(&path, &statfs);
2024 if (err)
2025 goto out_nfserr;
2026 }
2027 if ((bmval0 & (FATTR4_WORD0_FILEHANDLE | FATTR4_WORD0_FSID)) && !fhp) {
2028 fh_init(&tempfh, NFS4_FHSIZE);
2029 status = fh_compose(&tempfh, exp, dentry, NULL);
2030 if (status)
2031 goto out;
2032 fhp = &tempfh;
2033 }
2034 if (bmval0 & (FATTR4_WORD0_ACL | FATTR4_WORD0_ACLSUPPORT
2035 | FATTR4_WORD0_SUPPORTED_ATTRS)) {
2036 err = nfsd4_get_nfs4_acl(rqstp, dentry, &acl);
2037 aclsupport = (err == 0);
2038 if (bmval0 & FATTR4_WORD0_ACL) {
2039 if (err == -EOPNOTSUPP)
2040 bmval0 &= ~FATTR4_WORD0_ACL;
2041 else if (err == -EINVAL) {
2042 status = nfserr_attrnotsupp;
2043 goto out;
2044 } else if (err != 0)
2045 goto out_nfserr;
2046 }
2047 }
2048
2049 if (bmval2) {
2050 if ((buflen -= 16) < 0)
2051 goto out_resource;
2052 WRITE32(3);
2053 WRITE32(bmval0);
2054 WRITE32(bmval1);
2055 WRITE32(bmval2);
2056 } else if (bmval1) {
2057 if ((buflen -= 12) < 0)
2058 goto out_resource;
2059 WRITE32(2);
2060 WRITE32(bmval0);
2061 WRITE32(bmval1);
2062 } else {
2063 if ((buflen -= 8) < 0)
2064 goto out_resource;
2065 WRITE32(1);
2066 WRITE32(bmval0);
2067 }
2068 attrlenp = p++; /* to be backfilled later */
2069
2070 if (bmval0 & FATTR4_WORD0_SUPPORTED_ATTRS) {
2071 u32 word0 = nfsd_suppattrs0(minorversion);
2072 u32 word1 = nfsd_suppattrs1(minorversion);
2073 u32 word2 = nfsd_suppattrs2(minorversion);
2074
2075 if (!aclsupport)
2076 word0 &= ~FATTR4_WORD0_ACL;
2077 if (!word2) {
2078 if ((buflen -= 12) < 0)
2079 goto out_resource;
2080 WRITE32(2);
2081 WRITE32(word0);
2082 WRITE32(word1);
2083 } else {
2084 if ((buflen -= 16) < 0)
2085 goto out_resource;
2086 WRITE32(3);
2087 WRITE32(word0);
2088 WRITE32(word1);
2089 WRITE32(word2);
2090 }
2091 }
2092 if (bmval0 & FATTR4_WORD0_TYPE) {
2093 if ((buflen -= 4) < 0)
2094 goto out_resource;
2095 dummy = nfs4_file_type(stat.mode);
2096 if (dummy == NF4BAD)
2097 goto out_serverfault;
2098 WRITE32(dummy);
2099 }
2100 if (bmval0 & FATTR4_WORD0_FH_EXPIRE_TYPE) {
2101 if ((buflen -= 4) < 0)
2102 goto out_resource;
2103 if (exp->ex_flags & NFSEXP_NOSUBTREECHECK)
2104 WRITE32(NFS4_FH_PERSISTENT);
2105 else
2106 WRITE32(NFS4_FH_PERSISTENT|NFS4_FH_VOL_RENAME);
2107 }
2108 if (bmval0 & FATTR4_WORD0_CHANGE) {
2109 if ((buflen -= 8) < 0)
2110 goto out_resource;
2111 write_change(&p, &stat, dentry->d_inode);
2112 }
2113 if (bmval0 & FATTR4_WORD0_SIZE) {
2114 if ((buflen -= 8) < 0)
2115 goto out_resource;
2116 WRITE64(stat.size);
2117 }
2118 if (bmval0 & FATTR4_WORD0_LINK_SUPPORT) {
2119 if ((buflen -= 4) < 0)
2120 goto out_resource;
2121 WRITE32(1);
2122 }
2123 if (bmval0 & FATTR4_WORD0_SYMLINK_SUPPORT) {
2124 if ((buflen -= 4) < 0)
2125 goto out_resource;
2126 WRITE32(1);
2127 }
2128 if (bmval0 & FATTR4_WORD0_NAMED_ATTR) {
2129 if ((buflen -= 4) < 0)
2130 goto out_resource;
2131 WRITE32(0);
2132 }
2133 if (bmval0 & FATTR4_WORD0_FSID) {
2134 if ((buflen -= 16) < 0)
2135 goto out_resource;
2136 if (exp->ex_fslocs.migrated) {
2137 WRITE64(NFS4_REFERRAL_FSID_MAJOR);
2138 WRITE64(NFS4_REFERRAL_FSID_MINOR);
2139 } else switch(fsid_source(fhp)) {
2140 case FSIDSOURCE_FSID:
2141 WRITE64((u64)exp->ex_fsid);
2142 WRITE64((u64)0);
2143 break;
2144 case FSIDSOURCE_DEV:
2145 WRITE32(0);
2146 WRITE32(MAJOR(stat.dev));
2147 WRITE32(0);
2148 WRITE32(MINOR(stat.dev));
2149 break;
2150 case FSIDSOURCE_UUID:
2151 WRITEMEM(exp->ex_uuid, 16);
2152 break;
2153 }
2154 }
2155 if (bmval0 & FATTR4_WORD0_UNIQUE_HANDLES) {
2156 if ((buflen -= 4) < 0)
2157 goto out_resource;
2158 WRITE32(0);
2159 }
2160 if (bmval0 & FATTR4_WORD0_LEASE_TIME) {
2161 if ((buflen -= 4) < 0)
2162 goto out_resource;
2163 WRITE32(nfsd4_lease);
2164 }
2165 if (bmval0 & FATTR4_WORD0_RDATTR_ERROR) {
2166 if ((buflen -= 4) < 0)
2167 goto out_resource;
2168 WRITE32(rdattr_err);
2169 }
2170 if (bmval0 & FATTR4_WORD0_ACL) {
2171 struct nfs4_ace *ace;
2172
2173 if (acl == NULL) {
2174 if ((buflen -= 4) < 0)
2175 goto out_resource;
2176
2177 WRITE32(0);
2178 goto out_acl;
2179 }
2180 if ((buflen -= 4) < 0)
2181 goto out_resource;
2182 WRITE32(acl->naces);
2183
2184 for (ace = acl->aces; ace < acl->aces + acl->naces; ace++) {
2185 if ((buflen -= 4*3) < 0)
2186 goto out_resource;
2187 WRITE32(ace->type);
2188 WRITE32(ace->flag);
2189 WRITE32(ace->access_mask & NFS4_ACE_MASK_ALL);
2190 status = nfsd4_encode_aclname(rqstp, ace->whotype,
2191 ace->who, ace->flag & NFS4_ACE_IDENTIFIER_GROUP,
2192 &p, &buflen);
2193 if (status == nfserr_resource)
2194 goto out_resource;
2195 if (status)
2196 goto out;
2197 }
2198 }
2199 out_acl:
2200 if (bmval0 & FATTR4_WORD0_ACLSUPPORT) {
2201 if ((buflen -= 4) < 0)
2202 goto out_resource;
2203 WRITE32(aclsupport ?
2204 ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL : 0);
2205 }
2206 if (bmval0 & FATTR4_WORD0_CANSETTIME) {
2207 if ((buflen -= 4) < 0)
2208 goto out_resource;
2209 WRITE32(1);
2210 }
2211 if (bmval0 & FATTR4_WORD0_CASE_INSENSITIVE) {
2212 if ((buflen -= 4) < 0)
2213 goto out_resource;
2214 WRITE32(1);
2215 }
2216 if (bmval0 & FATTR4_WORD0_CASE_PRESERVING) {
2217 if ((buflen -= 4) < 0)
2218 goto out_resource;
2219 WRITE32(1);
2220 }
2221 if (bmval0 & FATTR4_WORD0_CHOWN_RESTRICTED) {
2222 if ((buflen -= 4) < 0)
2223 goto out_resource;
2224 WRITE32(1);
2225 }
2226 if (bmval0 & FATTR4_WORD0_FILEHANDLE) {
2227 buflen -= (XDR_QUADLEN(fhp->fh_handle.fh_size) << 2) + 4;
2228 if (buflen < 0)
2229 goto out_resource;
2230 WRITE32(fhp->fh_handle.fh_size);
2231 WRITEMEM(&fhp->fh_handle.fh_base, fhp->fh_handle.fh_size);
2232 }
2233 if (bmval0 & FATTR4_WORD0_FILEID) {
2234 if ((buflen -= 8) < 0)
2235 goto out_resource;
2236 WRITE64(stat.ino);
2237 }
2238 if (bmval0 & FATTR4_WORD0_FILES_AVAIL) {
2239 if ((buflen -= 8) < 0)
2240 goto out_resource;
2241 WRITE64((u64) statfs.f_ffree);
2242 }
2243 if (bmval0 & FATTR4_WORD0_FILES_FREE) {
2244 if ((buflen -= 8) < 0)
2245 goto out_resource;
2246 WRITE64((u64) statfs.f_ffree);
2247 }
2248 if (bmval0 & FATTR4_WORD0_FILES_TOTAL) {
2249 if ((buflen -= 8) < 0)
2250 goto out_resource;
2251 WRITE64((u64) statfs.f_files);
2252 }
2253 if (bmval0 & FATTR4_WORD0_FS_LOCATIONS) {
2254 status = nfsd4_encode_fs_locations(rqstp, exp, &p, &buflen);
2255 if (status == nfserr_resource)
2256 goto out_resource;
2257 if (status)
2258 goto out;
2259 }
2260 if (bmval0 & FATTR4_WORD0_HOMOGENEOUS) {
2261 if ((buflen -= 4) < 0)
2262 goto out_resource;
2263 WRITE32(1);
2264 }
2265 if (bmval0 & FATTR4_WORD0_MAXFILESIZE) {
2266 if ((buflen -= 8) < 0)
2267 goto out_resource;
2268 WRITE64(~(u64)0);
2269 }
2270 if (bmval0 & FATTR4_WORD0_MAXLINK) {
2271 if ((buflen -= 4) < 0)
2272 goto out_resource;
2273 WRITE32(255);
2274 }
2275 if (bmval0 & FATTR4_WORD0_MAXNAME) {
2276 if ((buflen -= 4) < 0)
2277 goto out_resource;
2278 WRITE32(statfs.f_namelen);
2279 }
2280 if (bmval0 & FATTR4_WORD0_MAXREAD) {
2281 if ((buflen -= 8) < 0)
2282 goto out_resource;
2283 WRITE64((u64) svc_max_payload(rqstp));
2284 }
2285 if (bmval0 & FATTR4_WORD0_MAXWRITE) {
2286 if ((buflen -= 8) < 0)
2287 goto out_resource;
2288 WRITE64((u64) svc_max_payload(rqstp));
2289 }
2290 if (bmval1 & FATTR4_WORD1_MODE) {
2291 if ((buflen -= 4) < 0)
2292 goto out_resource;
2293 WRITE32(stat.mode & S_IALLUGO);
2294 }
2295 if (bmval1 & FATTR4_WORD1_NO_TRUNC) {
2296 if ((buflen -= 4) < 0)
2297 goto out_resource;
2298 WRITE32(1);
2299 }
2300 if (bmval1 & FATTR4_WORD1_NUMLINKS) {
2301 if ((buflen -= 4) < 0)
2302 goto out_resource;
2303 WRITE32(stat.nlink);
2304 }
2305 if (bmval1 & FATTR4_WORD1_OWNER) {
2306 status = nfsd4_encode_user(rqstp, stat.uid, &p, &buflen);
2307 if (status == nfserr_resource)
2308 goto out_resource;
2309 if (status)
2310 goto out;
2311 }
2312 if (bmval1 & FATTR4_WORD1_OWNER_GROUP) {
2313 status = nfsd4_encode_group(rqstp, stat.gid, &p, &buflen);
2314 if (status == nfserr_resource)
2315 goto out_resource;
2316 if (status)
2317 goto out;
2318 }
2319 if (bmval1 & FATTR4_WORD1_RAWDEV) {
2320 if ((buflen -= 8) < 0)
2321 goto out_resource;
2322 WRITE32((u32) MAJOR(stat.rdev));
2323 WRITE32((u32) MINOR(stat.rdev));
2324 }
2325 if (bmval1 & FATTR4_WORD1_SPACE_AVAIL) {
2326 if ((buflen -= 8) < 0)
2327 goto out_resource;
2328 dummy64 = (u64)statfs.f_bavail * (u64)statfs.f_bsize;
2329 WRITE64(dummy64);
2330 }
2331 if (bmval1 & FATTR4_WORD1_SPACE_FREE) {
2332 if ((buflen -= 8) < 0)
2333 goto out_resource;
2334 dummy64 = (u64)statfs.f_bfree * (u64)statfs.f_bsize;
2335 WRITE64(dummy64);
2336 }
2337 if (bmval1 & FATTR4_WORD1_SPACE_TOTAL) {
2338 if ((buflen -= 8) < 0)
2339 goto out_resource;
2340 dummy64 = (u64)statfs.f_blocks * (u64)statfs.f_bsize;
2341 WRITE64(dummy64);
2342 }
2343 if (bmval1 & FATTR4_WORD1_SPACE_USED) {
2344 if ((buflen -= 8) < 0)
2345 goto out_resource;
2346 dummy64 = (u64)stat.blocks << 9;
2347 WRITE64(dummy64);
2348 }
2349 if (bmval1 & FATTR4_WORD1_TIME_ACCESS) {
2350 if ((buflen -= 12) < 0)
2351 goto out_resource;
2352 WRITE32(0);
2353 WRITE32(stat.atime.tv_sec);
2354 WRITE32(stat.atime.tv_nsec);
2355 }
2356 if (bmval1 & FATTR4_WORD1_TIME_DELTA) {
2357 if ((buflen -= 12) < 0)
2358 goto out_resource;
2359 WRITE32(0);
2360 WRITE32(1);
2361 WRITE32(0);
2362 }
2363 if (bmval1 & FATTR4_WORD1_TIME_METADATA) {
2364 if ((buflen -= 12) < 0)
2365 goto out_resource;
2366 WRITE32(0);
2367 WRITE32(stat.ctime.tv_sec);
2368 WRITE32(stat.ctime.tv_nsec);
2369 }
2370 if (bmval1 & FATTR4_WORD1_TIME_MODIFY) {
2371 if ((buflen -= 12) < 0)
2372 goto out_resource;
2373 WRITE32(0);
2374 WRITE32(stat.mtime.tv_sec);
2375 WRITE32(stat.mtime.tv_nsec);
2376 }
2377 if (bmval1 & FATTR4_WORD1_MOUNTED_ON_FILEID) {
2378 if ((buflen -= 8) < 0)
2379 goto out_resource;
2380 /*
2381 * Get parent's attributes if not ignoring crossmount
2382 * and this is the root of a cross-mounted filesystem.
2383 */
2384 if (ignore_crossmnt == 0 &&
2385 dentry == exp->ex_path.mnt->mnt_root) {
2386 struct path path = exp->ex_path;
2387 path_get(&path);
2388 while (follow_up(&path)) {
2389 if (path.dentry != path.mnt->mnt_root)
2390 break;
2391 }
2392 err = vfs_getattr(path.mnt, path.dentry, &stat);
2393 path_put(&path);
2394 if (err)
2395 goto out_nfserr;
2396 }
2397 WRITE64(stat.ino);
2398 }
2399 if (bmval2 & FATTR4_WORD2_SUPPATTR_EXCLCREAT) {
2400 WRITE32(3);
2401 WRITE32(NFSD_SUPPATTR_EXCLCREAT_WORD0);
2402 WRITE32(NFSD_SUPPATTR_EXCLCREAT_WORD1);
2403 WRITE32(NFSD_SUPPATTR_EXCLCREAT_WORD2);
2404 }
2405
2406 *attrlenp = htonl((char *)p - (char *)attrlenp - 4);
2407 *countp = p - buffer;
2408 status = nfs_ok;
2409
2410 out:
2411 kfree(acl);
2412 if (fhp == &tempfh)
2413 fh_put(&tempfh);
2414 return status;
2415 out_nfserr:
2416 status = nfserrno(err);
2417 goto out;
2418 out_resource:
2419 *countp = 0;
2420 status = nfserr_resource;
2421 goto out;
2422 out_serverfault:
2423 status = nfserr_serverfault;
2424 goto out;
2425 }
2426
2427 static inline int attributes_need_mount(u32 *bmval)
2428 {
2429 if (bmval[0] & ~(FATTR4_WORD0_RDATTR_ERROR | FATTR4_WORD0_LEASE_TIME))
2430 return 1;
2431 if (bmval[1] & ~FATTR4_WORD1_MOUNTED_ON_FILEID)
2432 return 1;
2433 return 0;
2434 }
2435
2436 static __be32
2437 nfsd4_encode_dirent_fattr(struct nfsd4_readdir *cd,
2438 const char *name, int namlen, __be32 *p, int *buflen)
2439 {
2440 struct svc_export *exp = cd->rd_fhp->fh_export;
2441 struct dentry *dentry;
2442 __be32 nfserr;
2443 int ignore_crossmnt = 0;
2444
2445 dentry = lookup_one_len(name, cd->rd_fhp->fh_dentry, namlen);
2446 if (IS_ERR(dentry))
2447 return nfserrno(PTR_ERR(dentry));
2448 if (!dentry->d_inode) {
2449 /*
2450 * nfsd_buffered_readdir drops the i_mutex between
2451 * readdir and calling this callback, leaving a window
2452 * where this directory entry could have gone away.
2453 */
2454 dput(dentry);
2455 return nfserr_noent;
2456 }
2457
2458 exp_get(exp);
2459 /*
2460 * In the case of a mountpoint, the client may be asking for
2461 * attributes that are only properties of the underlying filesystem
2462 * as opposed to the cross-mounted file system. In such a case,
2463 * we will not follow the cross mount and will fill the attribtutes
2464 * directly from the mountpoint dentry.
2465 */
2466 if (nfsd_mountpoint(dentry, exp)) {
2467 int err;
2468
2469 if (!(exp->ex_flags & NFSEXP_V4ROOT)
2470 && !attributes_need_mount(cd->rd_bmval)) {
2471 ignore_crossmnt = 1;
2472 goto out_encode;
2473 }
2474 /*
2475 * Why the heck aren't we just using nfsd_lookup??
2476 * Different "."/".." handling? Something else?
2477 * At least, add a comment here to explain....
2478 */
2479 err = nfsd_cross_mnt(cd->rd_rqstp, &dentry, &exp);
2480 if (err) {
2481 nfserr = nfserrno(err);
2482 goto out_put;
2483 }
2484 nfserr = check_nfsd_access(exp, cd->rd_rqstp);
2485 if (nfserr)
2486 goto out_put;
2487
2488 }
2489 out_encode:
2490 nfserr = nfsd4_encode_fattr(NULL, exp, dentry, p, buflen, cd->rd_bmval,
2491 cd->rd_rqstp, ignore_crossmnt);
2492 out_put:
2493 dput(dentry);
2494 exp_put(exp);
2495 return nfserr;
2496 }
2497
2498 static __be32 *
2499 nfsd4_encode_rdattr_error(__be32 *p, int buflen, __be32 nfserr)
2500 {
2501 __be32 *attrlenp;
2502
2503 if (buflen < 6)
2504 return NULL;
2505 *p++ = htonl(2);
2506 *p++ = htonl(FATTR4_WORD0_RDATTR_ERROR); /* bmval0 */
2507 *p++ = htonl(0); /* bmval1 */
2508
2509 attrlenp = p++;
2510 *p++ = nfserr; /* no htonl */
2511 *attrlenp = htonl((char *)p - (char *)attrlenp - 4);
2512 return p;
2513 }
2514
2515 static int
2516 nfsd4_encode_dirent(void *ccdv, const char *name, int namlen,
2517 loff_t offset, u64 ino, unsigned int d_type)
2518 {
2519 struct readdir_cd *ccd = ccdv;
2520 struct nfsd4_readdir *cd = container_of(ccd, struct nfsd4_readdir, common);
2521 int buflen;
2522 __be32 *p = cd->buffer;
2523 __be32 *cookiep;
2524 __be32 nfserr = nfserr_toosmall;
2525
2526 /* In nfsv4, "." and ".." never make it onto the wire.. */
2527 if (name && isdotent(name, namlen)) {
2528 cd->common.err = nfs_ok;
2529 return 0;
2530 }
2531
2532 if (cd->offset)
2533 xdr_encode_hyper(cd->offset, (u64) offset);
2534
2535 buflen = cd->buflen - 4 - XDR_QUADLEN(namlen);
2536 if (buflen < 0)
2537 goto fail;
2538
2539 *p++ = xdr_one; /* mark entry present */
2540 cookiep = p;
2541 p = xdr_encode_hyper(p, NFS_OFFSET_MAX); /* offset of next entry */
2542 p = xdr_encode_array(p, name, namlen); /* name length & name */
2543
2544 nfserr = nfsd4_encode_dirent_fattr(cd, name, namlen, p, &buflen);
2545 switch (nfserr) {
2546 case nfs_ok:
2547 p += buflen;
2548 break;
2549 case nfserr_resource:
2550 nfserr = nfserr_toosmall;
2551 goto fail;
2552 case nfserr_noent:
2553 goto skip_entry;
2554 default:
2555 /*
2556 * If the client requested the RDATTR_ERROR attribute,
2557 * we stuff the error code into this attribute
2558 * and continue. If this attribute was not requested,
2559 * then in accordance with the spec, we fail the
2560 * entire READDIR operation(!)
2561 */
2562 if (!(cd->rd_bmval[0] & FATTR4_WORD0_RDATTR_ERROR))
2563 goto fail;
2564 p = nfsd4_encode_rdattr_error(p, buflen, nfserr);
2565 if (p == NULL) {
2566 nfserr = nfserr_toosmall;
2567 goto fail;
2568 }
2569 }
2570 cd->buflen -= (p - cd->buffer);
2571 cd->buffer = p;
2572 cd->offset = cookiep;
2573 skip_entry:
2574 cd->common.err = nfs_ok;
2575 return 0;
2576 fail:
2577 cd->common.err = nfserr;
2578 return -EINVAL;
2579 }
2580
2581 static void
2582 nfsd4_encode_stateid(struct nfsd4_compoundres *resp, stateid_t *sid)
2583 {
2584 __be32 *p;
2585
2586 RESERVE_SPACE(sizeof(stateid_t));
2587 WRITE32(sid->si_generation);
2588 WRITEMEM(&sid->si_opaque, sizeof(stateid_opaque_t));
2589 ADJUST_ARGS();
2590 }
2591
2592 static __be32
2593 nfsd4_encode_access(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_access *access)
2594 {
2595 __be32 *p;
2596
2597 if (!nfserr) {
2598 RESERVE_SPACE(8);
2599 WRITE32(access->ac_supported);
2600 WRITE32(access->ac_resp_access);
2601 ADJUST_ARGS();
2602 }
2603 return nfserr;
2604 }
2605
2606 static __be32 nfsd4_encode_bind_conn_to_session(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_bind_conn_to_session *bcts)
2607 {
2608 __be32 *p;
2609
2610 if (!nfserr) {
2611 RESERVE_SPACE(NFS4_MAX_SESSIONID_LEN + 8);
2612 WRITEMEM(bcts->sessionid.data, NFS4_MAX_SESSIONID_LEN);
2613 WRITE32(bcts->dir);
2614 /* XXX: ? */
2615 WRITE32(0);
2616 ADJUST_ARGS();
2617 }
2618 return nfserr;
2619 }
2620
2621 static __be32
2622 nfsd4_encode_close(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_close *close)
2623 {
2624 ENCODE_SEQID_OP_HEAD;
2625
2626 if (!nfserr)
2627 nfsd4_encode_stateid(resp, &close->cl_stateid);
2628
2629 encode_seqid_op_tail(resp, save, nfserr);
2630 return nfserr;
2631 }
2632
2633
2634 static __be32
2635 nfsd4_encode_commit(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_commit *commit)
2636 {
2637 __be32 *p;
2638
2639 if (!nfserr) {
2640 RESERVE_SPACE(8);
2641 WRITEMEM(commit->co_verf.data, 8);
2642 ADJUST_ARGS();
2643 }
2644 return nfserr;
2645 }
2646
2647 static __be32
2648 nfsd4_encode_create(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_create *create)
2649 {
2650 __be32 *p;
2651
2652 if (!nfserr) {
2653 RESERVE_SPACE(32);
2654 write_cinfo(&p, &create->cr_cinfo);
2655 WRITE32(2);
2656 WRITE32(create->cr_bmval[0]);
2657 WRITE32(create->cr_bmval[1]);
2658 ADJUST_ARGS();
2659 }
2660 return nfserr;
2661 }
2662
2663 static __be32
2664 nfsd4_encode_getattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_getattr *getattr)
2665 {
2666 struct svc_fh *fhp = getattr->ga_fhp;
2667 int buflen;
2668
2669 if (nfserr)
2670 return nfserr;
2671
2672 buflen = resp->end - resp->p - (COMPOUND_ERR_SLACK_SPACE >> 2);
2673 nfserr = nfsd4_encode_fattr(fhp, fhp->fh_export, fhp->fh_dentry,
2674 resp->p, &buflen, getattr->ga_bmval,
2675 resp->rqstp, 0);
2676 if (!nfserr)
2677 resp->p += buflen;
2678 return nfserr;
2679 }
2680
2681 static __be32
2682 nfsd4_encode_getfh(struct nfsd4_compoundres *resp, __be32 nfserr, struct svc_fh **fhpp)
2683 {
2684 struct svc_fh *fhp = *fhpp;
2685 unsigned int len;
2686 __be32 *p;
2687
2688 if (!nfserr) {
2689 len = fhp->fh_handle.fh_size;
2690 RESERVE_SPACE(len + 4);
2691 WRITE32(len);
2692 WRITEMEM(&fhp->fh_handle.fh_base, len);
2693 ADJUST_ARGS();
2694 }
2695 return nfserr;
2696 }
2697
2698 /*
2699 * Including all fields other than the name, a LOCK4denied structure requires
2700 * 8(clientid) + 4(namelen) + 8(offset) + 8(length) + 4(type) = 32 bytes.
2701 */
2702 static void
2703 nfsd4_encode_lock_denied(struct nfsd4_compoundres *resp, struct nfsd4_lock_denied *ld)
2704 {
2705 struct xdr_netobj *conf = &ld->ld_owner;
2706 __be32 *p;
2707
2708 RESERVE_SPACE(32 + XDR_LEN(conf->len));
2709 WRITE64(ld->ld_start);
2710 WRITE64(ld->ld_length);
2711 WRITE32(ld->ld_type);
2712 if (conf->len) {
2713 WRITEMEM(&ld->ld_clientid, 8);
2714 WRITE32(conf->len);
2715 WRITEMEM(conf->data, conf->len);
2716 kfree(conf->data);
2717 } else { /* non - nfsv4 lock in conflict, no clientid nor owner */
2718 WRITE64((u64)0); /* clientid */
2719 WRITE32(0); /* length of owner name */
2720 }
2721 ADJUST_ARGS();
2722 }
2723
2724 static __be32
2725 nfsd4_encode_lock(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lock *lock)
2726 {
2727 ENCODE_SEQID_OP_HEAD;
2728
2729 if (!nfserr)
2730 nfsd4_encode_stateid(resp, &lock->lk_resp_stateid);
2731 else if (nfserr == nfserr_denied)
2732 nfsd4_encode_lock_denied(resp, &lock->lk_denied);
2733
2734 encode_seqid_op_tail(resp, save, nfserr);
2735 return nfserr;
2736 }
2737
2738 static __be32
2739 nfsd4_encode_lockt(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lockt *lockt)
2740 {
2741 if (nfserr == nfserr_denied)
2742 nfsd4_encode_lock_denied(resp, &lockt->lt_denied);
2743 return nfserr;
2744 }
2745
2746 static __be32
2747 nfsd4_encode_locku(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_locku *locku)
2748 {
2749 ENCODE_SEQID_OP_HEAD;
2750
2751 if (!nfserr)
2752 nfsd4_encode_stateid(resp, &locku->lu_stateid);
2753
2754 encode_seqid_op_tail(resp, save, nfserr);
2755 return nfserr;
2756 }
2757
2758
2759 static __be32
2760 nfsd4_encode_link(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_link *link)
2761 {
2762 __be32 *p;
2763
2764 if (!nfserr) {
2765 RESERVE_SPACE(20);
2766 write_cinfo(&p, &link->li_cinfo);
2767 ADJUST_ARGS();
2768 }
2769 return nfserr;
2770 }
2771
2772
2773 static __be32
2774 nfsd4_encode_open(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open *open)
2775 {
2776 __be32 *p;
2777 ENCODE_SEQID_OP_HEAD;
2778
2779 if (nfserr)
2780 goto out;
2781
2782 nfsd4_encode_stateid(resp, &open->op_stateid);
2783 RESERVE_SPACE(40);
2784 write_cinfo(&p, &open->op_cinfo);
2785 WRITE32(open->op_rflags);
2786 WRITE32(2);
2787 WRITE32(open->op_bmval[0]);
2788 WRITE32(open->op_bmval[1]);
2789 WRITE32(open->op_delegate_type);
2790 ADJUST_ARGS();
2791
2792 switch (open->op_delegate_type) {
2793 case NFS4_OPEN_DELEGATE_NONE:
2794 break;
2795 case NFS4_OPEN_DELEGATE_READ:
2796 nfsd4_encode_stateid(resp, &open->op_delegate_stateid);
2797 RESERVE_SPACE(20);
2798 WRITE32(open->op_recall);
2799
2800 /*
2801 * TODO: ACE's in delegations
2802 */
2803 WRITE32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
2804 WRITE32(0);
2805 WRITE32(0);
2806 WRITE32(0); /* XXX: is NULL principal ok? */
2807 ADJUST_ARGS();
2808 break;
2809 case NFS4_OPEN_DELEGATE_WRITE:
2810 nfsd4_encode_stateid(resp, &open->op_delegate_stateid);
2811 RESERVE_SPACE(32);
2812 WRITE32(0);
2813
2814 /*
2815 * TODO: space_limit's in delegations
2816 */
2817 WRITE32(NFS4_LIMIT_SIZE);
2818 WRITE32(~(u32)0);
2819 WRITE32(~(u32)0);
2820
2821 /*
2822 * TODO: ACE's in delegations
2823 */
2824 WRITE32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
2825 WRITE32(0);
2826 WRITE32(0);
2827 WRITE32(0); /* XXX: is NULL principal ok? */
2828 ADJUST_ARGS();
2829 break;
2830 default:
2831 BUG();
2832 }
2833 /* XXX save filehandle here */
2834 out:
2835 encode_seqid_op_tail(resp, save, nfserr);
2836 return nfserr;
2837 }
2838
2839 static __be32
2840 nfsd4_encode_open_confirm(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_confirm *oc)
2841 {
2842 ENCODE_SEQID_OP_HEAD;
2843
2844 if (!nfserr)
2845 nfsd4_encode_stateid(resp, &oc->oc_resp_stateid);
2846
2847 encode_seqid_op_tail(resp, save, nfserr);
2848 return nfserr;
2849 }
2850
2851 static __be32
2852 nfsd4_encode_open_downgrade(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_downgrade *od)
2853 {
2854 ENCODE_SEQID_OP_HEAD;
2855
2856 if (!nfserr)
2857 nfsd4_encode_stateid(resp, &od->od_stateid);
2858
2859 encode_seqid_op_tail(resp, save, nfserr);
2860 return nfserr;
2861 }
2862
2863 static __be32
2864 nfsd4_encode_read(struct nfsd4_compoundres *resp, __be32 nfserr,
2865 struct nfsd4_read *read)
2866 {
2867 u32 eof;
2868 int v, pn;
2869 unsigned long maxcount;
2870 long len;
2871 __be32 *p;
2872
2873 if (nfserr)
2874 return nfserr;
2875 if (resp->xbuf->page_len)
2876 return nfserr_resource;
2877
2878 RESERVE_SPACE(8); /* eof flag and byte count */
2879
2880 maxcount = svc_max_payload(resp->rqstp);
2881 if (maxcount > read->rd_length)
2882 maxcount = read->rd_length;
2883
2884 len = maxcount;
2885 v = 0;
2886 while (len > 0) {
2887 pn = resp->rqstp->rq_resused++;
2888 resp->rqstp->rq_vec[v].iov_base =
2889 page_address(resp->rqstp->rq_respages[pn]);
2890 resp->rqstp->rq_vec[v].iov_len =
2891 len < PAGE_SIZE ? len : PAGE_SIZE;
2892 v++;
2893 len -= PAGE_SIZE;
2894 }
2895 read->rd_vlen = v;
2896
2897 nfserr = nfsd_read_file(read->rd_rqstp, read->rd_fhp, read->rd_filp,
2898 read->rd_offset, resp->rqstp->rq_vec, read->rd_vlen,
2899 &maxcount);
2900
2901 if (nfserr)
2902 return nfserr;
2903 eof = (read->rd_offset + maxcount >=
2904 read->rd_fhp->fh_dentry->d_inode->i_size);
2905
2906 WRITE32(eof);
2907 WRITE32(maxcount);
2908 ADJUST_ARGS();
2909 resp->xbuf->head[0].iov_len = (char*)p
2910 - (char*)resp->xbuf->head[0].iov_base;
2911 resp->xbuf->page_len = maxcount;
2912
2913 /* Use rest of head for padding and remaining ops: */
2914 resp->xbuf->tail[0].iov_base = p;
2915 resp->xbuf->tail[0].iov_len = 0;
2916 if (maxcount&3) {
2917 RESERVE_SPACE(4);
2918 WRITE32(0);
2919 resp->xbuf->tail[0].iov_base += maxcount&3;
2920 resp->xbuf->tail[0].iov_len = 4 - (maxcount&3);
2921 ADJUST_ARGS();
2922 }
2923 return 0;
2924 }
2925
2926 static __be32
2927 nfsd4_encode_readlink(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readlink *readlink)
2928 {
2929 int maxcount;
2930 char *page;
2931 __be32 *p;
2932
2933 if (nfserr)
2934 return nfserr;
2935 if (resp->xbuf->page_len)
2936 return nfserr_resource;
2937
2938 page = page_address(resp->rqstp->rq_respages[resp->rqstp->rq_resused++]);
2939
2940 maxcount = PAGE_SIZE;
2941 RESERVE_SPACE(4);
2942
2943 /*
2944 * XXX: By default, the ->readlink() VFS op will truncate symlinks
2945 * if they would overflow the buffer. Is this kosher in NFSv4? If
2946 * not, one easy fix is: if ->readlink() precisely fills the buffer,
2947 * assume that truncation occurred, and return NFS4ERR_RESOURCE.
2948 */
2949 nfserr = nfsd_readlink(readlink->rl_rqstp, readlink->rl_fhp, page, &maxcount);
2950 if (nfserr == nfserr_isdir)
2951 return nfserr_inval;
2952 if (nfserr)
2953 return nfserr;
2954
2955 WRITE32(maxcount);
2956 ADJUST_ARGS();
2957 resp->xbuf->head[0].iov_len = (char*)p
2958 - (char*)resp->xbuf->head[0].iov_base;
2959 resp->xbuf->page_len = maxcount;
2960
2961 /* Use rest of head for padding and remaining ops: */
2962 resp->xbuf->tail[0].iov_base = p;
2963 resp->xbuf->tail[0].iov_len = 0;
2964 if (maxcount&3) {
2965 RESERVE_SPACE(4);
2966 WRITE32(0);
2967 resp->xbuf->tail[0].iov_base += maxcount&3;
2968 resp->xbuf->tail[0].iov_len = 4 - (maxcount&3);
2969 ADJUST_ARGS();
2970 }
2971 return 0;
2972 }
2973
2974 static __be32
2975 nfsd4_encode_readdir(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readdir *readdir)
2976 {
2977 int maxcount;
2978 loff_t offset;
2979 __be32 *page, *savep, *tailbase;
2980 __be32 *p;
2981
2982 if (nfserr)
2983 return nfserr;
2984 if (resp->xbuf->page_len)
2985 return nfserr_resource;
2986
2987 RESERVE_SPACE(8); /* verifier */
2988 savep = p;
2989
2990 /* XXX: Following NFSv3, we ignore the READDIR verifier for now. */
2991 WRITE32(0);
2992 WRITE32(0);
2993 ADJUST_ARGS();
2994 resp->xbuf->head[0].iov_len = ((char*)resp->p) - (char*)resp->xbuf->head[0].iov_base;
2995 tailbase = p;
2996
2997 maxcount = PAGE_SIZE;
2998 if (maxcount > readdir->rd_maxcount)
2999 maxcount = readdir->rd_maxcount;
3000
3001 /*
3002 * Convert from bytes to words, account for the two words already
3003 * written, make sure to leave two words at the end for the next
3004 * pointer and eof field.
3005 */
3006 maxcount = (maxcount >> 2) - 4;
3007 if (maxcount < 0) {
3008 nfserr = nfserr_toosmall;
3009 goto err_no_verf;
3010 }
3011
3012 page = page_address(resp->rqstp->rq_respages[resp->rqstp->rq_resused++]);
3013 readdir->common.err = 0;
3014 readdir->buflen = maxcount;
3015 readdir->buffer = page;
3016 readdir->offset = NULL;
3017
3018 offset = readdir->rd_cookie;
3019 nfserr = nfsd_readdir(readdir->rd_rqstp, readdir->rd_fhp,
3020 &offset,
3021 &readdir->common, nfsd4_encode_dirent);
3022 if (nfserr == nfs_ok &&
3023 readdir->common.err == nfserr_toosmall &&
3024 readdir->buffer == page)
3025 nfserr = nfserr_toosmall;
3026 if (nfserr)
3027 goto err_no_verf;
3028
3029 if (readdir->offset)
3030 xdr_encode_hyper(readdir->offset, offset);
3031
3032 p = readdir->buffer;
3033 *p++ = 0; /* no more entries */
3034 *p++ = htonl(readdir->common.err == nfserr_eof);
3035 resp->xbuf->page_len = ((char*)p) - (char*)page_address(
3036 resp->rqstp->rq_respages[resp->rqstp->rq_resused-1]);
3037
3038 /* Use rest of head for padding and remaining ops: */
3039 resp->xbuf->tail[0].iov_base = tailbase;
3040 resp->xbuf->tail[0].iov_len = 0;
3041 resp->p = resp->xbuf->tail[0].iov_base;
3042 resp->end = resp->p + (PAGE_SIZE - resp->xbuf->head[0].iov_len)/4;
3043
3044 return 0;
3045 err_no_verf:
3046 p = savep;
3047 ADJUST_ARGS();
3048 return nfserr;
3049 }
3050
3051 static __be32
3052 nfsd4_encode_remove(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_remove *remove)
3053 {
3054 __be32 *p;
3055
3056 if (!nfserr) {
3057 RESERVE_SPACE(20);
3058 write_cinfo(&p, &remove->rm_cinfo);
3059 ADJUST_ARGS();
3060 }
3061 return nfserr;
3062 }
3063
3064 static __be32
3065 nfsd4_encode_rename(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_rename *rename)
3066 {
3067 __be32 *p;
3068
3069 if (!nfserr) {
3070 RESERVE_SPACE(40);
3071 write_cinfo(&p, &rename->rn_sinfo);
3072 write_cinfo(&p, &rename->rn_tinfo);
3073 ADJUST_ARGS();
3074 }
3075 return nfserr;
3076 }
3077
3078 static __be32
3079 nfsd4_do_encode_secinfo(struct nfsd4_compoundres *resp,
3080 __be32 nfserr,struct svc_export *exp)
3081 {
3082 int i = 0;
3083 u32 nflavs;
3084 struct exp_flavor_info *flavs;
3085 struct exp_flavor_info def_flavs[2];
3086 __be32 *p;
3087
3088 if (nfserr)
3089 goto out;
3090 if (exp->ex_nflavors) {
3091 flavs = exp->ex_flavors;
3092 nflavs = exp->ex_nflavors;
3093 } else { /* Handling of some defaults in absence of real secinfo: */
3094 flavs = def_flavs;
3095 if (exp->ex_client->flavour->flavour == RPC_AUTH_UNIX) {
3096 nflavs = 2;
3097 flavs[0].pseudoflavor = RPC_AUTH_UNIX;
3098 flavs[1].pseudoflavor = RPC_AUTH_NULL;
3099 } else if (exp->ex_client->flavour->flavour == RPC_AUTH_GSS) {
3100 nflavs = 1;
3101 flavs[0].pseudoflavor
3102 = svcauth_gss_flavor(exp->ex_client);
3103 } else {
3104 nflavs = 1;
3105 flavs[0].pseudoflavor
3106 = exp->ex_client->flavour->flavour;
3107 }
3108 }
3109
3110 RESERVE_SPACE(4);
3111 WRITE32(nflavs);
3112 ADJUST_ARGS();
3113 for (i = 0; i < nflavs; i++) {
3114 u32 flav = flavs[i].pseudoflavor;
3115 struct gss_api_mech *gm = gss_mech_get_by_pseudoflavor(flav);
3116
3117 if (gm) {
3118 RESERVE_SPACE(4);
3119 WRITE32(RPC_AUTH_GSS);
3120 ADJUST_ARGS();
3121 RESERVE_SPACE(4 + gm->gm_oid.len);
3122 WRITE32(gm->gm_oid.len);
3123 WRITEMEM(gm->gm_oid.data, gm->gm_oid.len);
3124 ADJUST_ARGS();
3125 RESERVE_SPACE(4);
3126 WRITE32(0); /* qop */
3127 ADJUST_ARGS();
3128 RESERVE_SPACE(4);
3129 WRITE32(gss_pseudoflavor_to_service(gm, flav));
3130 ADJUST_ARGS();
3131 gss_mech_put(gm);
3132 } else {
3133 RESERVE_SPACE(4);
3134 WRITE32(flav);
3135 ADJUST_ARGS();
3136 }
3137 }
3138 out:
3139 if (exp)
3140 exp_put(exp);
3141 return nfserr;
3142 }
3143
3144 static __be32
3145 nfsd4_encode_secinfo(struct nfsd4_compoundres *resp, __be32 nfserr,
3146 struct nfsd4_secinfo *secinfo)
3147 {
3148 return nfsd4_do_encode_secinfo(resp, nfserr, secinfo->si_exp);
3149 }
3150
3151 static __be32
3152 nfsd4_encode_secinfo_no_name(struct nfsd4_compoundres *resp, __be32 nfserr,
3153 struct nfsd4_secinfo_no_name *secinfo)
3154 {
3155 return nfsd4_do_encode_secinfo(resp, nfserr, secinfo->sin_exp);
3156 }
3157
3158 /*
3159 * The SETATTR encode routine is special -- it always encodes a bitmap,
3160 * regardless of the error status.
3161 */
3162 static __be32
3163 nfsd4_encode_setattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setattr *setattr)
3164 {
3165 __be32 *p;
3166
3167 RESERVE_SPACE(12);
3168 if (nfserr) {
3169 WRITE32(2);
3170 WRITE32(0);
3171 WRITE32(0);
3172 }
3173 else {
3174 WRITE32(2);
3175 WRITE32(setattr->sa_bmval[0]);
3176 WRITE32(setattr->sa_bmval[1]);
3177 }
3178 ADJUST_ARGS();
3179 return nfserr;
3180 }
3181
3182 static __be32
3183 nfsd4_encode_setclientid(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setclientid *scd)
3184 {
3185 __be32 *p;
3186
3187 if (!nfserr) {
3188 RESERVE_SPACE(8 + sizeof(nfs4_verifier));
3189 WRITEMEM(&scd->se_clientid, 8);
3190 WRITEMEM(&scd->se_confirm, sizeof(nfs4_verifier));
3191 ADJUST_ARGS();
3192 }
3193 else if (nfserr == nfserr_clid_inuse) {
3194 RESERVE_SPACE(8);
3195 WRITE32(0);
3196 WRITE32(0);
3197 ADJUST_ARGS();
3198 }
3199 return nfserr;
3200 }
3201
3202 static __be32
3203 nfsd4_encode_write(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_write *write)
3204 {
3205 __be32 *p;
3206
3207 if (!nfserr) {
3208 RESERVE_SPACE(16);
3209 WRITE32(write->wr_bytes_written);
3210 WRITE32(write->wr_how_written);
3211 WRITEMEM(write->wr_verifier.data, 8);
3212 ADJUST_ARGS();
3213 }
3214 return nfserr;
3215 }
3216
3217 static __be32
3218 nfsd4_encode_exchange_id(struct nfsd4_compoundres *resp, int nfserr,
3219 struct nfsd4_exchange_id *exid)
3220 {
3221 __be32 *p;
3222 char *major_id;
3223 char *server_scope;
3224 int major_id_sz;
3225 int server_scope_sz;
3226 uint64_t minor_id = 0;
3227
3228 if (nfserr)
3229 return nfserr;
3230
3231 major_id = utsname()->nodename;
3232 major_id_sz = strlen(major_id);
3233 server_scope = utsname()->nodename;
3234 server_scope_sz = strlen(server_scope);
3235
3236 RESERVE_SPACE(
3237 8 /* eir_clientid */ +
3238 4 /* eir_sequenceid */ +
3239 4 /* eir_flags */ +
3240 4 /* spr_how (SP4_NONE) */ +
3241 8 /* so_minor_id */ +
3242 4 /* so_major_id.len */ +
3243 (XDR_QUADLEN(major_id_sz) * 4) +
3244 4 /* eir_server_scope.len */ +
3245 (XDR_QUADLEN(server_scope_sz) * 4) +
3246 4 /* eir_server_impl_id.count (0) */);
3247
3248 WRITEMEM(&exid->clientid, 8);
3249 WRITE32(exid->seqid);
3250 WRITE32(exid->flags);
3251
3252 /* state_protect4_r. Currently only support SP4_NONE */
3253 BUG_ON(exid->spa_how != SP4_NONE);
3254 WRITE32(exid->spa_how);
3255
3256 /* The server_owner struct */
3257 WRITE64(minor_id); /* Minor id */
3258 /* major id */
3259 WRITE32(major_id_sz);
3260 WRITEMEM(major_id, major_id_sz);
3261
3262 /* Server scope */
3263 WRITE32(server_scope_sz);
3264 WRITEMEM(server_scope, server_scope_sz);
3265
3266 /* Implementation id */
3267 WRITE32(0); /* zero length nfs_impl_id4 array */
3268 ADJUST_ARGS();
3269 return 0;
3270 }
3271
3272 static __be32
3273 nfsd4_encode_create_session(struct nfsd4_compoundres *resp, int nfserr,
3274 struct nfsd4_create_session *sess)
3275 {
3276 __be32 *p;
3277
3278 if (nfserr)
3279 return nfserr;
3280
3281 RESERVE_SPACE(24);
3282 WRITEMEM(sess->sessionid.data, NFS4_MAX_SESSIONID_LEN);
3283 WRITE32(sess->seqid);
3284 WRITE32(sess->flags);
3285 ADJUST_ARGS();
3286
3287 RESERVE_SPACE(28);
3288 WRITE32(0); /* headerpadsz */
3289 WRITE32(sess->fore_channel.maxreq_sz);
3290 WRITE32(sess->fore_channel.maxresp_sz);
3291 WRITE32(sess->fore_channel.maxresp_cached);
3292 WRITE32(sess->fore_channel.maxops);
3293 WRITE32(sess->fore_channel.maxreqs);
3294 WRITE32(sess->fore_channel.nr_rdma_attrs);
3295 ADJUST_ARGS();
3296
3297 if (sess->fore_channel.nr_rdma_attrs) {
3298 RESERVE_SPACE(4);
3299 WRITE32(sess->fore_channel.rdma_attrs);
3300 ADJUST_ARGS();
3301 }
3302
3303 RESERVE_SPACE(28);
3304 WRITE32(0); /* headerpadsz */
3305 WRITE32(sess->back_channel.maxreq_sz);
3306 WRITE32(sess->back_channel.maxresp_sz);
3307 WRITE32(sess->back_channel.maxresp_cached);
3308 WRITE32(sess->back_channel.maxops);
3309 WRITE32(sess->back_channel.maxreqs);
3310 WRITE32(sess->back_channel.nr_rdma_attrs);
3311 ADJUST_ARGS();
3312
3313 if (sess->back_channel.nr_rdma_attrs) {
3314 RESERVE_SPACE(4);
3315 WRITE32(sess->back_channel.rdma_attrs);
3316 ADJUST_ARGS();
3317 }
3318 return 0;
3319 }
3320
3321 static __be32
3322 nfsd4_encode_destroy_session(struct nfsd4_compoundres *resp, int nfserr,
3323 struct nfsd4_destroy_session *destroy_session)
3324 {
3325 return nfserr;
3326 }
3327
3328 static __be32
3329 nfsd4_encode_free_stateid(struct nfsd4_compoundres *resp, int nfserr,
3330 struct nfsd4_free_stateid *free_stateid)
3331 {
3332 __be32 *p;
3333
3334 if (nfserr)
3335 return nfserr;
3336
3337 RESERVE_SPACE(4);
3338 WRITE32(nfserr);
3339 ADJUST_ARGS();
3340 return nfserr;
3341 }
3342
3343 static __be32
3344 nfsd4_encode_sequence(struct nfsd4_compoundres *resp, int nfserr,
3345 struct nfsd4_sequence *seq)
3346 {
3347 __be32 *p;
3348
3349 if (nfserr)
3350 return nfserr;
3351
3352 RESERVE_SPACE(NFS4_MAX_SESSIONID_LEN + 20);
3353 WRITEMEM(seq->sessionid.data, NFS4_MAX_SESSIONID_LEN);
3354 WRITE32(seq->seqid);
3355 WRITE32(seq->slotid);
3356 /* Note slotid's are numbered from zero: */
3357 WRITE32(seq->maxslots - 1); /* sr_highest_slotid */
3358 WRITE32(seq->maxslots - 1); /* sr_target_highest_slotid */
3359 WRITE32(seq->status_flags);
3360
3361 ADJUST_ARGS();
3362 resp->cstate.datap = p; /* DRC cache data pointer */
3363 return 0;
3364 }
3365
3366 __be32
3367 nfsd4_encode_test_stateid(struct nfsd4_compoundres *resp, int nfserr,
3368 struct nfsd4_test_stateid *test_stateid)
3369 {
3370 struct nfsd4_compoundargs *argp;
3371 struct nfs4_client *cl = resp->cstate.session->se_client;
3372 stateid_t si;
3373 __be32 *p;
3374 int i;
3375 int valid;
3376
3377 restore_buf(test_stateid->ts_saved_args, &test_stateid->ts_savedp);
3378 argp = test_stateid->ts_saved_args;
3379
3380 RESERVE_SPACE(4);
3381 *p++ = htonl(test_stateid->ts_num_ids);
3382 resp->p = p;
3383
3384 nfs4_lock_state();
3385 for (i = 0; i < test_stateid->ts_num_ids; i++) {
3386 nfsd4_decode_stateid(argp, &si);
3387 valid = nfs4_validate_stateid(cl, &si);
3388 RESERVE_SPACE(4);
3389 *p++ = htonl(valid);
3390 resp->p = p;
3391 }
3392 nfs4_unlock_state();
3393
3394 return nfserr;
3395 }
3396
3397 static __be32
3398 nfsd4_encode_noop(struct nfsd4_compoundres *resp, __be32 nfserr, void *p)
3399 {
3400 return nfserr;
3401 }
3402
3403 typedef __be32(* nfsd4_enc)(struct nfsd4_compoundres *, __be32, void *);
3404
3405 /*
3406 * Note: nfsd4_enc_ops vector is shared for v4.0 and v4.1
3407 * since we don't need to filter out obsolete ops as this is
3408 * done in the decoding phase.
3409 */
3410 static nfsd4_enc nfsd4_enc_ops[] = {
3411 [OP_ACCESS] = (nfsd4_enc)nfsd4_encode_access,
3412 [OP_CLOSE] = (nfsd4_enc)nfsd4_encode_close,
3413 [OP_COMMIT] = (nfsd4_enc)nfsd4_encode_commit,
3414 [OP_CREATE] = (nfsd4_enc)nfsd4_encode_create,
3415 [OP_DELEGPURGE] = (nfsd4_enc)nfsd4_encode_noop,
3416 [OP_DELEGRETURN] = (nfsd4_enc)nfsd4_encode_noop,
3417 [OP_GETATTR] = (nfsd4_enc)nfsd4_encode_getattr,
3418 [OP_GETFH] = (nfsd4_enc)nfsd4_encode_getfh,
3419 [OP_LINK] = (nfsd4_enc)nfsd4_encode_link,
3420 [OP_LOCK] = (nfsd4_enc)nfsd4_encode_lock,
3421 [OP_LOCKT] = (nfsd4_enc)nfsd4_encode_lockt,
3422 [OP_LOCKU] = (nfsd4_enc)nfsd4_encode_locku,
3423 [OP_LOOKUP] = (nfsd4_enc)nfsd4_encode_noop,
3424 [OP_LOOKUPP] = (nfsd4_enc)nfsd4_encode_noop,
3425 [OP_NVERIFY] = (nfsd4_enc)nfsd4_encode_noop,
3426 [OP_OPEN] = (nfsd4_enc)nfsd4_encode_open,
3427 [OP_OPENATTR] = (nfsd4_enc)nfsd4_encode_noop,
3428 [OP_OPEN_CONFIRM] = (nfsd4_enc)nfsd4_encode_open_confirm,
3429 [OP_OPEN_DOWNGRADE] = (nfsd4_enc)nfsd4_encode_open_downgrade,
3430 [OP_PUTFH] = (nfsd4_enc)nfsd4_encode_noop,
3431 [OP_PUTPUBFH] = (nfsd4_enc)nfsd4_encode_noop,
3432 [OP_PUTROOTFH] = (nfsd4_enc)nfsd4_encode_noop,
3433 [OP_READ] = (nfsd4_enc)nfsd4_encode_read,
3434 [OP_READDIR] = (nfsd4_enc)nfsd4_encode_readdir,
3435 [OP_READLINK] = (nfsd4_enc)nfsd4_encode_readlink,
3436 [OP_REMOVE] = (nfsd4_enc)nfsd4_encode_remove,
3437 [OP_RENAME] = (nfsd4_enc)nfsd4_encode_rename,
3438 [OP_RENEW] = (nfsd4_enc)nfsd4_encode_noop,
3439 [OP_RESTOREFH] = (nfsd4_enc)nfsd4_encode_noop,
3440 [OP_SAVEFH] = (nfsd4_enc)nfsd4_encode_noop,
3441 [OP_SECINFO] = (nfsd4_enc)nfsd4_encode_secinfo,
3442 [OP_SETATTR] = (nfsd4_enc)nfsd4_encode_setattr,
3443 [OP_SETCLIENTID] = (nfsd4_enc)nfsd4_encode_setclientid,
3444 [OP_SETCLIENTID_CONFIRM] = (nfsd4_enc)nfsd4_encode_noop,
3445 [OP_VERIFY] = (nfsd4_enc)nfsd4_encode_noop,
3446 [OP_WRITE] = (nfsd4_enc)nfsd4_encode_write,
3447 [OP_RELEASE_LOCKOWNER] = (nfsd4_enc)nfsd4_encode_noop,
3448
3449 /* NFSv4.1 operations */
3450 [OP_BACKCHANNEL_CTL] = (nfsd4_enc)nfsd4_encode_noop,
3451 [OP_BIND_CONN_TO_SESSION] = (nfsd4_enc)nfsd4_encode_bind_conn_to_session,
3452 [OP_EXCHANGE_ID] = (nfsd4_enc)nfsd4_encode_exchange_id,
3453 [OP_CREATE_SESSION] = (nfsd4_enc)nfsd4_encode_create_session,
3454 [OP_DESTROY_SESSION] = (nfsd4_enc)nfsd4_encode_destroy_session,
3455 [OP_FREE_STATEID] = (nfsd4_enc)nfsd4_encode_free_stateid,
3456 [OP_GET_DIR_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop,
3457 [OP_GETDEVICEINFO] = (nfsd4_enc)nfsd4_encode_noop,
3458 [OP_GETDEVICELIST] = (nfsd4_enc)nfsd4_encode_noop,
3459 [OP_LAYOUTCOMMIT] = (nfsd4_enc)nfsd4_encode_noop,
3460 [OP_LAYOUTGET] = (nfsd4_enc)nfsd4_encode_noop,
3461 [OP_LAYOUTRETURN] = (nfsd4_enc)nfsd4_encode_noop,
3462 [OP_SECINFO_NO_NAME] = (nfsd4_enc)nfsd4_encode_secinfo_no_name,
3463 [OP_SEQUENCE] = (nfsd4_enc)nfsd4_encode_sequence,
3464 [OP_SET_SSV] = (nfsd4_enc)nfsd4_encode_noop,
3465 [OP_TEST_STATEID] = (nfsd4_enc)nfsd4_encode_test_stateid,
3466 [OP_WANT_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop,
3467 [OP_DESTROY_CLIENTID] = (nfsd4_enc)nfsd4_encode_noop,
3468 [OP_RECLAIM_COMPLETE] = (nfsd4_enc)nfsd4_encode_noop,
3469 };
3470
3471 /*
3472 * Calculate the total amount of memory that the compound response has taken
3473 * after encoding the current operation with pad.
3474 *
3475 * pad: if operation is non-idempotent, pad was calculate by op_rsize_bop()
3476 * which was specified at nfsd4_operation, else pad is zero.
3477 *
3478 * Compare this length to the session se_fmaxresp_sz and se_fmaxresp_cached.
3479 *
3480 * Our se_fmaxresp_cached will always be a multiple of PAGE_SIZE, and so
3481 * will be at least a page and will therefore hold the xdr_buf head.
3482 */
3483 int nfsd4_check_resp_size(struct nfsd4_compoundres *resp, u32 pad)
3484 {
3485 struct xdr_buf *xb = &resp->rqstp->rq_res;
3486 struct nfsd4_session *session = NULL;
3487 struct nfsd4_slot *slot = resp->cstate.slot;
3488 u32 length, tlen = 0;
3489
3490 if (!nfsd4_has_session(&resp->cstate))
3491 return 0;
3492
3493 session = resp->cstate.session;
3494 if (session == NULL)
3495 return 0;
3496
3497 if (xb->page_len == 0) {
3498 length = (char *)resp->p - (char *)xb->head[0].iov_base + pad;
3499 } else {
3500 if (xb->tail[0].iov_base && xb->tail[0].iov_len > 0)
3501 tlen = (char *)resp->p - (char *)xb->tail[0].iov_base;
3502
3503 length = xb->head[0].iov_len + xb->page_len + tlen + pad;
3504 }
3505 dprintk("%s length %u, xb->page_len %u tlen %u pad %u\n", __func__,
3506 length, xb->page_len, tlen, pad);
3507
3508 if (length > session->se_fchannel.maxresp_sz)
3509 return nfserr_rep_too_big;
3510
3511 if (slot->sl_cachethis == 1 &&
3512 length > session->se_fchannel.maxresp_cached)
3513 return nfserr_rep_too_big_to_cache;
3514
3515 return 0;
3516 }
3517
3518 void
3519 nfsd4_encode_operation(struct nfsd4_compoundres *resp, struct nfsd4_op *op)
3520 {
3521 __be32 *statp;
3522 __be32 *p;
3523
3524 RESERVE_SPACE(8);
3525 WRITE32(op->opnum);
3526 statp = p++; /* to be backfilled at the end */
3527 ADJUST_ARGS();
3528
3529 if (op->opnum == OP_ILLEGAL)
3530 goto status;
3531 BUG_ON(op->opnum < 0 || op->opnum >= ARRAY_SIZE(nfsd4_enc_ops) ||
3532 !nfsd4_enc_ops[op->opnum]);
3533 op->status = nfsd4_enc_ops[op->opnum](resp, op->status, &op->u);
3534 /* nfsd4_check_drc_limit guarantees enough room for error status */
3535 if (!op->status)
3536 op->status = nfsd4_check_resp_size(resp, 0);
3537 status:
3538 /*
3539 * Note: We write the status directly, instead of using WRITE32(),
3540 * since it is already in network byte order.
3541 */
3542 *statp = op->status;
3543 }
3544
3545 /*
3546 * Encode the reply stored in the stateowner reply cache
3547 *
3548 * XDR note: do not encode rp->rp_buflen: the buffer contains the
3549 * previously sent already encoded operation.
3550 *
3551 * called with nfs4_lock_state() held
3552 */
3553 void
3554 nfsd4_encode_replay(struct nfsd4_compoundres *resp, struct nfsd4_op *op)
3555 {
3556 __be32 *p;
3557 struct nfs4_replay *rp = op->replay;
3558
3559 BUG_ON(!rp);
3560
3561 RESERVE_SPACE(8);
3562 WRITE32(op->opnum);
3563 *p++ = rp->rp_status; /* already xdr'ed */
3564 ADJUST_ARGS();
3565
3566 RESERVE_SPACE(rp->rp_buflen);
3567 WRITEMEM(rp->rp_buf, rp->rp_buflen);
3568 ADJUST_ARGS();
3569 }
3570
3571 int
3572 nfs4svc_encode_voidres(struct svc_rqst *rqstp, __be32 *p, void *dummy)
3573 {
3574 return xdr_ressize_check(rqstp, p);
3575 }
3576
3577 int nfsd4_release_compoundargs(void *rq, __be32 *p, void *resp)
3578 {
3579 struct svc_rqst *rqstp = rq;
3580 struct nfsd4_compoundargs *args = rqstp->rq_argp;
3581
3582 if (args->ops != args->iops) {
3583 kfree(args->ops);
3584 args->ops = args->iops;
3585 }
3586 kfree(args->tmpp);
3587 args->tmpp = NULL;
3588 while (args->to_free) {
3589 struct tmpbuf *tb = args->to_free;
3590 args->to_free = tb->next;
3591 tb->release(tb->buf);
3592 kfree(tb);
3593 }
3594 return 1;
3595 }
3596
3597 int
3598 nfs4svc_decode_compoundargs(struct svc_rqst *rqstp, __be32 *p, struct nfsd4_compoundargs *args)
3599 {
3600 args->p = p;
3601 args->end = rqstp->rq_arg.head[0].iov_base + rqstp->rq_arg.head[0].iov_len;
3602 args->pagelist = rqstp->rq_arg.pages;
3603 args->pagelen = rqstp->rq_arg.page_len;
3604 args->tmpp = NULL;
3605 args->to_free = NULL;
3606 args->ops = args->iops;
3607 args->rqstp = rqstp;
3608
3609 return !nfsd4_decode_compound(args);
3610 }
3611
3612 int
3613 nfs4svc_encode_compoundres(struct svc_rqst *rqstp, __be32 *p, struct nfsd4_compoundres *resp)
3614 {
3615 /*
3616 * All that remains is to write the tag and operation count...
3617 */
3618 struct nfsd4_compound_state *cs = &resp->cstate;
3619 struct kvec *iov;
3620 p = resp->tagp;
3621 *p++ = htonl(resp->taglen);
3622 memcpy(p, resp->tag, resp->taglen);
3623 p += XDR_QUADLEN(resp->taglen);
3624 *p++ = htonl(resp->opcnt);
3625
3626 if (rqstp->rq_res.page_len)
3627 iov = &rqstp->rq_res.tail[0];
3628 else
3629 iov = &rqstp->rq_res.head[0];
3630 iov->iov_len = ((char*)resp->p) - (char*)iov->iov_base;
3631 BUG_ON(iov->iov_len > PAGE_SIZE);
3632 if (nfsd4_has_session(cs)) {
3633 if (cs->status != nfserr_replay_cache) {
3634 nfsd4_store_cache_entry(resp);
3635 dprintk("%s: SET SLOT STATE TO AVAILABLE\n", __func__);
3636 cs->slot->sl_inuse = false;
3637 }
3638 /* Renew the clientid on success and on replay */
3639 release_session_client(cs->session);
3640 nfsd4_put_session(cs->session);
3641 }
3642 return 1;
3643 }
3644
3645 /*
3646 * Local variables:
3647 * c-basic-offset: 8
3648 * End:
3649 */
kernel source for telekom puls (alcatel/mediatek)