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Linux 4.8-rc8
[linux/fpc-iii.git] / fs / nfsd / nfs4xdr.c
blob0aa0236a142904c6de5123b87ef96c55043c7f7d
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
36 #include <linux/file.h>
37 #include <linux/slab.h>
38 #include <linux/namei.h>
39 #include <linux/statfs.h>
40 #include <linux/utsname.h>
41 #include <linux/pagemap.h>
42 #include <linux/sunrpc/svcauth_gss.h>
43
44 #include "idmap.h"
45 #include "acl.h"
46 #include "xdr4.h"
47 #include "vfs.h"
48 #include "state.h"
49 #include "cache.h"
50 #include "netns.h"
51 #include "pnfs.h"
52
53 #ifdef CONFIG_NFSD_V4_SECURITY_LABEL
54 #include <linux/security.h>
55 #endif
56
57
58 #define NFSDDBG_FACILITY NFSDDBG_XDR
59
60 /*
61 * As per referral draft, the fsid for a referral MUST be different from the fsid of the containing
62 * directory in order to indicate to the client that a filesystem boundary is present
63 * We use a fixed fsid for a referral
64 */
65 #define NFS4_REFERRAL_FSID_MAJOR 0x8000000ULL
66 #define NFS4_REFERRAL_FSID_MINOR 0x8000000ULL
67
68 static __be32
69 check_filename(char *str, int len)
70 {
71 int i;
72
73 if (len == 0)
74 return nfserr_inval;
75 if (isdotent(str, len))
76 return nfserr_badname;
77 for (i = 0; i < len; i++)
78 if (str[i] == '/')
79 return nfserr_badname;
80 return 0;
81 }
82
83 #define DECODE_HEAD \
84 __be32 *p; \
85 __be32 status
86 #define DECODE_TAIL \
87 status = 0; \
88 out: \
89 return status; \
90 xdr_error: \
91 dprintk("NFSD: xdr error (%s:%d)\n", \
92 __FILE__, __LINE__); \
93 status = nfserr_bad_xdr; \
94 goto out
95
96 #define READMEM(x,nbytes) do { \
97 x = (char *)p; \
98 p += XDR_QUADLEN(nbytes); \
99 } while (0)
100 #define SAVEMEM(x,nbytes) do { \
101 if (!(x = (p==argp->tmp || p == argp->tmpp) ? \
102 savemem(argp, p, nbytes) : \
103 (char *)p)) { \
104 dprintk("NFSD: xdr error (%s:%d)\n", \
105 __FILE__, __LINE__); \
106 goto xdr_error; \
107 } \
108 p += XDR_QUADLEN(nbytes); \
109 } while (0)
110 #define COPYMEM(x,nbytes) do { \
111 memcpy((x), p, nbytes); \
112 p += XDR_QUADLEN(nbytes); \
113 } while (0)
114
115 /* READ_BUF, read_buf(): nbytes must be <= PAGE_SIZE */
116 #define READ_BUF(nbytes) do { \
117 if (nbytes <= (u32)((char *)argp->end - (char *)argp->p)) { \
118 p = argp->p; \
119 argp->p += XDR_QUADLEN(nbytes); \
120 } else if (!(p = read_buf(argp, nbytes))) { \
121 dprintk("NFSD: xdr error (%s:%d)\n", \
122 __FILE__, __LINE__); \
123 goto xdr_error; \
124 } \
125 } while (0)
126
127 static void next_decode_page(struct nfsd4_compoundargs *argp)
128 {
129 argp->p = page_address(argp->pagelist[0]);
130 argp->pagelist++;
131 if (argp->pagelen < PAGE_SIZE) {
132 argp->end = argp->p + (argp->pagelen>>2);
133 argp->pagelen = 0;
134 } else {
135 argp->end = argp->p + (PAGE_SIZE>>2);
136 argp->pagelen -= PAGE_SIZE;
137 }
138 }
139
140 static __be32 *read_buf(struct nfsd4_compoundargs *argp, u32 nbytes)
141 {
142 /* We want more bytes than seem to be available.
143 * Maybe we need a new page, maybe we have just run out
144 */
145 unsigned int avail = (char *)argp->end - (char *)argp->p;
146 __be32 *p;
147 if (avail + argp->pagelen < nbytes)
148 return NULL;
149 if (avail + PAGE_SIZE < nbytes) /* need more than a page !! */
150 return NULL;
151 /* ok, we can do it with the current plus the next page */
152 if (nbytes <= sizeof(argp->tmp))
153 p = argp->tmp;
154 else {
155 kfree(argp->tmpp);
156 p = argp->tmpp = kmalloc(nbytes, GFP_KERNEL);
157 if (!p)
158 return NULL;
159
160 }
161 /*
162 * The following memcpy is safe because read_buf is always
163 * called with nbytes > avail, and the two cases above both
164 * guarantee p points to at least nbytes bytes.
165 */
166 memcpy(p, argp->p, avail);
167 next_decode_page(argp);
168 memcpy(((char*)p)+avail, argp->p, (nbytes - avail));
169 argp->p += XDR_QUADLEN(nbytes - avail);
170 return p;
171 }
172
173 static int zero_clientid(clientid_t *clid)
174 {
175 return (clid->cl_boot == 0) && (clid->cl_id == 0);
176 }
177
178 /**
179 * svcxdr_tmpalloc - allocate memory to be freed after compound processing
180 * @argp: NFSv4 compound argument structure
181 * @p: pointer to be freed (with kfree())
182 *
183 * Marks @p to be freed when processing the compound operation
184 * described in @argp finishes.
185 */
186 static void *
187 svcxdr_tmpalloc(struct nfsd4_compoundargs *argp, u32 len)
188 {
189 struct svcxdr_tmpbuf *tb;
190
191 tb = kmalloc(sizeof(*tb) + len, GFP_KERNEL);
192 if (!tb)
193 return NULL;
194 tb->next = argp->to_free;
195 argp->to_free = tb;
196 return tb->buf;
197 }
198
199 /*
200 * For xdr strings that need to be passed to other kernel api's
201 * as null-terminated strings.
202 *
203 * Note null-terminating in place usually isn't safe since the
204 * buffer might end on a page boundary.
205 */
206 static char *
207 svcxdr_dupstr(struct nfsd4_compoundargs *argp, void *buf, u32 len)
208 {
209 char *p = svcxdr_tmpalloc(argp, len + 1);
210
211 if (!p)
212 return NULL;
213 memcpy(p, buf, len);
214 p[len] = '\0';
215 return p;
216 }
217
218 /**
219 * savemem - duplicate a chunk of memory for later processing
220 * @argp: NFSv4 compound argument structure to be freed with
221 * @p: pointer to be duplicated
222 * @nbytes: length to be duplicated
223 *
224 * Returns a pointer to a copy of @nbytes bytes of memory at @p
225 * that are preserved until processing of the NFSv4 compound
226 * operation described by @argp finishes.
227 */
228 static char *savemem(struct nfsd4_compoundargs *argp, __be32 *p, int nbytes)
229 {
230 void *ret;
231
232 ret = svcxdr_tmpalloc(argp, nbytes);
233 if (!ret)
234 return NULL;
235 memcpy(ret, p, nbytes);
236 return ret;
237 }
238
239 /*
240 * We require the high 32 bits of 'seconds' to be 0, and
241 * we ignore all 32 bits of 'nseconds'.
242 */
243 static __be32
244 nfsd4_decode_time(struct nfsd4_compoundargs *argp, struct timespec *tv)
245 {
246 DECODE_HEAD;
247 u64 sec;
248
249 READ_BUF(12);
250 p = xdr_decode_hyper(p, &sec);
251 tv->tv_sec = sec;
252 tv->tv_nsec = be32_to_cpup(p++);
253 if (tv->tv_nsec >= (u32)1000000000)
254 return nfserr_inval;
255
256 DECODE_TAIL;
257 }
258
259 static __be32
260 nfsd4_decode_bitmap(struct nfsd4_compoundargs *argp, u32 *bmval)
261 {
262 u32 bmlen;
263 DECODE_HEAD;
264
265 bmval[0] = 0;
266 bmval[1] = 0;
267 bmval[2] = 0;
268
269 READ_BUF(4);
270 bmlen = be32_to_cpup(p++);
271 if (bmlen > 1000)
272 goto xdr_error;
273
274 READ_BUF(bmlen << 2);
275 if (bmlen > 0)
276 bmval[0] = be32_to_cpup(p++);
277 if (bmlen > 1)
278 bmval[1] = be32_to_cpup(p++);
279 if (bmlen > 2)
280 bmval[2] = be32_to_cpup(p++);
281
282 DECODE_TAIL;
283 }
284
285 static __be32
286 nfsd4_decode_fattr(struct nfsd4_compoundargs *argp, u32 *bmval,
287 struct iattr *iattr, struct nfs4_acl **acl,
288 struct xdr_netobj *label)
289 {
290 int expected_len, len = 0;
291 u32 dummy32;
292 char *buf;
293
294 DECODE_HEAD;
295 iattr->ia_valid = 0;
296 if ((status = nfsd4_decode_bitmap(argp, bmval)))
297 return status;
298
299 READ_BUF(4);
300 expected_len = be32_to_cpup(p++);
301
302 if (bmval[0] & FATTR4_WORD0_SIZE) {
303 READ_BUF(8);
304 len += 8;
305 p = xdr_decode_hyper(p, &iattr->ia_size);
306 iattr->ia_valid |= ATTR_SIZE;
307 }
308 if (bmval[0] & FATTR4_WORD0_ACL) {
309 u32 nace;
310 struct nfs4_ace *ace;
311
312 READ_BUF(4); len += 4;
313 nace = be32_to_cpup(p++);
314
315 if (nace > NFS4_ACL_MAX)
316 return nfserr_fbig;
317
318 *acl = svcxdr_tmpalloc(argp, nfs4_acl_bytes(nace));
319 if (*acl == NULL)
320 return nfserr_jukebox;
321
322 (*acl)->naces = nace;
323 for (ace = (*acl)->aces; ace < (*acl)->aces + nace; ace++) {
324 READ_BUF(16); len += 16;
325 ace->type = be32_to_cpup(p++);
326 ace->flag = be32_to_cpup(p++);
327 ace->access_mask = be32_to_cpup(p++);
328 dummy32 = be32_to_cpup(p++);
329 READ_BUF(dummy32);
330 len += XDR_QUADLEN(dummy32) << 2;
331 READMEM(buf, dummy32);
332 ace->whotype = nfs4_acl_get_whotype(buf, dummy32);
333 status = nfs_ok;
334 if (ace->whotype != NFS4_ACL_WHO_NAMED)
335 ;
336 else if (ace->flag & NFS4_ACE_IDENTIFIER_GROUP)
337 status = nfsd_map_name_to_gid(argp->rqstp,
338 buf, dummy32, &ace->who_gid);
339 else
340 status = nfsd_map_name_to_uid(argp->rqstp,
341 buf, dummy32, &ace->who_uid);
342 if (status)
343 return status;
344 }
345 } else
346 *acl = NULL;
347 if (bmval[1] & FATTR4_WORD1_MODE) {
348 READ_BUF(4);
349 len += 4;
350 iattr->ia_mode = be32_to_cpup(p++);
351 iattr->ia_mode &= (S_IFMT | S_IALLUGO);
352 iattr->ia_valid |= ATTR_MODE;
353 }
354 if (bmval[1] & FATTR4_WORD1_OWNER) {
355 READ_BUF(4);
356 len += 4;
357 dummy32 = be32_to_cpup(p++);
358 READ_BUF(dummy32);
359 len += (XDR_QUADLEN(dummy32) << 2);
360 READMEM(buf, dummy32);
361 if ((status = nfsd_map_name_to_uid(argp->rqstp, buf, dummy32, &iattr->ia_uid)))
362 return status;
363 iattr->ia_valid |= ATTR_UID;
364 }
365 if (bmval[1] & FATTR4_WORD1_OWNER_GROUP) {
366 READ_BUF(4);
367 len += 4;
368 dummy32 = be32_to_cpup(p++);
369 READ_BUF(dummy32);
370 len += (XDR_QUADLEN(dummy32) << 2);
371 READMEM(buf, dummy32);
372 if ((status = nfsd_map_name_to_gid(argp->rqstp, buf, dummy32, &iattr->ia_gid)))
373 return status;
374 iattr->ia_valid |= ATTR_GID;
375 }
376 if (bmval[1] & FATTR4_WORD1_TIME_ACCESS_SET) {
377 READ_BUF(4);
378 len += 4;
379 dummy32 = be32_to_cpup(p++);
380 switch (dummy32) {
381 case NFS4_SET_TO_CLIENT_TIME:
382 len += 12;
383 status = nfsd4_decode_time(argp, &iattr->ia_atime);
384 if (status)
385 return status;
386 iattr->ia_valid |= (ATTR_ATIME | ATTR_ATIME_SET);
387 break;
388 case NFS4_SET_TO_SERVER_TIME:
389 iattr->ia_valid |= ATTR_ATIME;
390 break;
391 default:
392 goto xdr_error;
393 }
394 }
395 if (bmval[1] & FATTR4_WORD1_TIME_MODIFY_SET) {
396 READ_BUF(4);
397 len += 4;
398 dummy32 = be32_to_cpup(p++);
399 switch (dummy32) {
400 case NFS4_SET_TO_CLIENT_TIME:
401 len += 12;
402 status = nfsd4_decode_time(argp, &iattr->ia_mtime);
403 if (status)
404 return status;
405 iattr->ia_valid |= (ATTR_MTIME | ATTR_MTIME_SET);
406 break;
407 case NFS4_SET_TO_SERVER_TIME:
408 iattr->ia_valid |= ATTR_MTIME;
409 break;
410 default:
411 goto xdr_error;
412 }
413 }
414
415 label->len = 0;
416 #ifdef CONFIG_NFSD_V4_SECURITY_LABEL
417 if (bmval[2] & FATTR4_WORD2_SECURITY_LABEL) {
418 READ_BUF(4);
419 len += 4;
420 dummy32 = be32_to_cpup(p++); /* lfs: we don't use it */
421 READ_BUF(4);
422 len += 4;
423 dummy32 = be32_to_cpup(p++); /* pi: we don't use it either */
424 READ_BUF(4);
425 len += 4;
426 dummy32 = be32_to_cpup(p++);
427 READ_BUF(dummy32);
428 if (dummy32 > NFS4_MAXLABELLEN)
429 return nfserr_badlabel;
430 len += (XDR_QUADLEN(dummy32) << 2);
431 READMEM(buf, dummy32);
432 label->len = dummy32;
433 label->data = svcxdr_dupstr(argp, buf, dummy32);
434 if (!label->data)
435 return nfserr_jukebox;
436 }
437 #endif
438
439 if (bmval[0] & ~NFSD_WRITEABLE_ATTRS_WORD0
440 || bmval[1] & ~NFSD_WRITEABLE_ATTRS_WORD1
441 || bmval[2] & ~NFSD_WRITEABLE_ATTRS_WORD2)
442 READ_BUF(expected_len - len);
443 else if (len != expected_len)
444 goto xdr_error;
445
446 DECODE_TAIL;
447 }
448
449 static __be32
450 nfsd4_decode_stateid(struct nfsd4_compoundargs *argp, stateid_t *sid)
451 {
452 DECODE_HEAD;
453
454 READ_BUF(sizeof(stateid_t));
455 sid->si_generation = be32_to_cpup(p++);
456 COPYMEM(&sid->si_opaque, sizeof(stateid_opaque_t));
457
458 DECODE_TAIL;
459 }
460
461 static __be32
462 nfsd4_decode_access(struct nfsd4_compoundargs *argp, struct nfsd4_access *access)
463 {
464 DECODE_HEAD;
465
466 READ_BUF(4);
467 access->ac_req_access = be32_to_cpup(p++);
468
469 DECODE_TAIL;
470 }
471
472 static __be32 nfsd4_decode_cb_sec(struct nfsd4_compoundargs *argp, struct nfsd4_cb_sec *cbs)
473 {
474 DECODE_HEAD;
475 u32 dummy, uid, gid;
476 char *machine_name;
477 int i;
478 int nr_secflavs;
479
480 /* callback_sec_params4 */
481 READ_BUF(4);
482 nr_secflavs = be32_to_cpup(p++);
483 if (nr_secflavs)
484 cbs->flavor = (u32)(-1);
485 else
486 /* Is this legal? Be generous, take it to mean AUTH_NONE: */
487 cbs->flavor = 0;
488 for (i = 0; i < nr_secflavs; ++i) {
489 READ_BUF(4);
490 dummy = be32_to_cpup(p++);
491 switch (dummy) {
492 case RPC_AUTH_NULL:
493 /* Nothing to read */
494 if (cbs->flavor == (u32)(-1))
495 cbs->flavor = RPC_AUTH_NULL;
496 break;
497 case RPC_AUTH_UNIX:
498 READ_BUF(8);
499 /* stamp */
500 dummy = be32_to_cpup(p++);
501
502 /* machine name */
503 dummy = be32_to_cpup(p++);
504 READ_BUF(dummy);
505 SAVEMEM(machine_name, dummy);
506
507 /* uid, gid */
508 READ_BUF(8);
509 uid = be32_to_cpup(p++);
510 gid = be32_to_cpup(p++);
511
512 /* more gids */
513 READ_BUF(4);
514 dummy = be32_to_cpup(p++);
515 READ_BUF(dummy * 4);
516 if (cbs->flavor == (u32)(-1)) {
517 kuid_t kuid = make_kuid(&init_user_ns, uid);
518 kgid_t kgid = make_kgid(&init_user_ns, gid);
519 if (uid_valid(kuid) && gid_valid(kgid)) {
520 cbs->uid = kuid;
521 cbs->gid = kgid;
522 cbs->flavor = RPC_AUTH_UNIX;
523 } else {
524 dprintk("RPC_AUTH_UNIX with invalid"
525 "uid or gid ignoring!\n");
526 }
527 }
528 break;
529 case RPC_AUTH_GSS:
530 dprintk("RPC_AUTH_GSS callback secflavor "
531 "not supported!\n");
532 READ_BUF(8);
533 /* gcbp_service */
534 dummy = be32_to_cpup(p++);
535 /* gcbp_handle_from_server */
536 dummy = be32_to_cpup(p++);
537 READ_BUF(dummy);
538 p += XDR_QUADLEN(dummy);
539 /* gcbp_handle_from_client */
540 READ_BUF(4);
541 dummy = be32_to_cpup(p++);
542 READ_BUF(dummy);
543 break;
544 default:
545 dprintk("Illegal callback secflavor\n");
546 return nfserr_inval;
547 }
548 }
549 DECODE_TAIL;
550 }
551
552 static __be32 nfsd4_decode_backchannel_ctl(struct nfsd4_compoundargs *argp, struct nfsd4_backchannel_ctl *bc)
553 {
554 DECODE_HEAD;
555
556 READ_BUF(4);
557 bc->bc_cb_program = be32_to_cpup(p++);
558 nfsd4_decode_cb_sec(argp, &bc->bc_cb_sec);
559
560 DECODE_TAIL;
561 }
562
563 static __be32 nfsd4_decode_bind_conn_to_session(struct nfsd4_compoundargs *argp, struct nfsd4_bind_conn_to_session *bcts)
564 {
565 DECODE_HEAD;
566
567 READ_BUF(NFS4_MAX_SESSIONID_LEN + 8);
568 COPYMEM(bcts->sessionid.data, NFS4_MAX_SESSIONID_LEN);
569 bcts->dir = be32_to_cpup(p++);
570 /* XXX: skipping ctsa_use_conn_in_rdma_mode. Perhaps Tom Tucker
571 * could help us figure out we should be using it. */
572 DECODE_TAIL;
573 }
574
575 static __be32
576 nfsd4_decode_close(struct nfsd4_compoundargs *argp, struct nfsd4_close *close)
577 {
578 DECODE_HEAD;
579
580 READ_BUF(4);
581 close->cl_seqid = be32_to_cpup(p++);
582 return nfsd4_decode_stateid(argp, &close->cl_stateid);
583
584 DECODE_TAIL;
585 }
586
587
588 static __be32
589 nfsd4_decode_commit(struct nfsd4_compoundargs *argp, struct nfsd4_commit *commit)
590 {
591 DECODE_HEAD;
592
593 READ_BUF(12);
594 p = xdr_decode_hyper(p, &commit->co_offset);
595 commit->co_count = be32_to_cpup(p++);
596
597 DECODE_TAIL;
598 }
599
600 static __be32
601 nfsd4_decode_create(struct nfsd4_compoundargs *argp, struct nfsd4_create *create)
602 {
603 DECODE_HEAD;
604
605 READ_BUF(4);
606 create->cr_type = be32_to_cpup(p++);
607 switch (create->cr_type) {
608 case NF4LNK:
609 READ_BUF(4);
610 create->cr_datalen = be32_to_cpup(p++);
611 READ_BUF(create->cr_datalen);
612 create->cr_data = svcxdr_dupstr(argp, p, create->cr_datalen);
613 if (!create->cr_data)
614 return nfserr_jukebox;
615 break;
616 case NF4BLK:
617 case NF4CHR:
618 READ_BUF(8);
619 create->cr_specdata1 = be32_to_cpup(p++);
620 create->cr_specdata2 = be32_to_cpup(p++);
621 break;
622 case NF4SOCK:
623 case NF4FIFO:
624 case NF4DIR:
625 default:
626 break;
627 }
628
629 READ_BUF(4);
630 create->cr_namelen = be32_to_cpup(p++);
631 READ_BUF(create->cr_namelen);
632 SAVEMEM(create->cr_name, create->cr_namelen);
633 if ((status = check_filename(create->cr_name, create->cr_namelen)))
634 return status;
635
636 status = nfsd4_decode_fattr(argp, create->cr_bmval, &create->cr_iattr,
637 &create->cr_acl, &create->cr_label);
638 if (status)
639 goto out;
640
641 DECODE_TAIL;
642 }
643
644 static inline __be32
645 nfsd4_decode_delegreturn(struct nfsd4_compoundargs *argp, struct nfsd4_delegreturn *dr)
646 {
647 return nfsd4_decode_stateid(argp, &dr->dr_stateid);
648 }
649
650 static inline __be32
651 nfsd4_decode_getattr(struct nfsd4_compoundargs *argp, struct nfsd4_getattr *getattr)
652 {
653 return nfsd4_decode_bitmap(argp, getattr->ga_bmval);
654 }
655
656 static __be32
657 nfsd4_decode_link(struct nfsd4_compoundargs *argp, struct nfsd4_link *link)
658 {
659 DECODE_HEAD;
660
661 READ_BUF(4);
662 link->li_namelen = be32_to_cpup(p++);
663 READ_BUF(link->li_namelen);
664 SAVEMEM(link->li_name, link->li_namelen);
665 if ((status = check_filename(link->li_name, link->li_namelen)))
666 return status;
667
668 DECODE_TAIL;
669 }
670
671 static __be32
672 nfsd4_decode_lock(struct nfsd4_compoundargs *argp, struct nfsd4_lock *lock)
673 {
674 DECODE_HEAD;
675
676 /*
677 * type, reclaim(boolean), offset, length, new_lock_owner(boolean)
678 */
679 READ_BUF(28);
680 lock->lk_type = be32_to_cpup(p++);
681 if ((lock->lk_type < NFS4_READ_LT) || (lock->lk_type > NFS4_WRITEW_LT))
682 goto xdr_error;
683 lock->lk_reclaim = be32_to_cpup(p++);
684 p = xdr_decode_hyper(p, &lock->lk_offset);
685 p = xdr_decode_hyper(p, &lock->lk_length);
686 lock->lk_is_new = be32_to_cpup(p++);
687
688 if (lock->lk_is_new) {
689 READ_BUF(4);
690 lock->lk_new_open_seqid = be32_to_cpup(p++);
691 status = nfsd4_decode_stateid(argp, &lock->lk_new_open_stateid);
692 if (status)
693 return status;
694 READ_BUF(8 + sizeof(clientid_t));
695 lock->lk_new_lock_seqid = be32_to_cpup(p++);
696 COPYMEM(&lock->lk_new_clientid, sizeof(clientid_t));
697 lock->lk_new_owner.len = be32_to_cpup(p++);
698 READ_BUF(lock->lk_new_owner.len);
699 READMEM(lock->lk_new_owner.data, lock->lk_new_owner.len);
700 } else {
701 status = nfsd4_decode_stateid(argp, &lock->lk_old_lock_stateid);
702 if (status)
703 return status;
704 READ_BUF(4);
705 lock->lk_old_lock_seqid = be32_to_cpup(p++);
706 }
707
708 DECODE_TAIL;
709 }
710
711 static __be32
712 nfsd4_decode_lockt(struct nfsd4_compoundargs *argp, struct nfsd4_lockt *lockt)
713 {
714 DECODE_HEAD;
715
716 READ_BUF(32);
717 lockt->lt_type = be32_to_cpup(p++);
718 if((lockt->lt_type < NFS4_READ_LT) || (lockt->lt_type > NFS4_WRITEW_LT))
719 goto xdr_error;
720 p = xdr_decode_hyper(p, &lockt->lt_offset);
721 p = xdr_decode_hyper(p, &lockt->lt_length);
722 COPYMEM(&lockt->lt_clientid, 8);
723 lockt->lt_owner.len = be32_to_cpup(p++);
724 READ_BUF(lockt->lt_owner.len);
725 READMEM(lockt->lt_owner.data, lockt->lt_owner.len);
726
727 DECODE_TAIL;
728 }
729
730 static __be32
731 nfsd4_decode_locku(struct nfsd4_compoundargs *argp, struct nfsd4_locku *locku)
732 {
733 DECODE_HEAD;
734
735 READ_BUF(8);
736 locku->lu_type = be32_to_cpup(p++);
737 if ((locku->lu_type < NFS4_READ_LT) || (locku->lu_type > NFS4_WRITEW_LT))
738 goto xdr_error;
739 locku->lu_seqid = be32_to_cpup(p++);
740 status = nfsd4_decode_stateid(argp, &locku->lu_stateid);
741 if (status)
742 return status;
743 READ_BUF(16);
744 p = xdr_decode_hyper(p, &locku->lu_offset);
745 p = xdr_decode_hyper(p, &locku->lu_length);
746
747 DECODE_TAIL;
748 }
749
750 static __be32
751 nfsd4_decode_lookup(struct nfsd4_compoundargs *argp, struct nfsd4_lookup *lookup)
752 {
753 DECODE_HEAD;
754
755 READ_BUF(4);
756 lookup->lo_len = be32_to_cpup(p++);
757 READ_BUF(lookup->lo_len);
758 SAVEMEM(lookup->lo_name, lookup->lo_len);
759 if ((status = check_filename(lookup->lo_name, lookup->lo_len)))
760 return status;
761
762 DECODE_TAIL;
763 }
764
765 static __be32 nfsd4_decode_share_access(struct nfsd4_compoundargs *argp, u32 *share_access, u32 *deleg_want, u32 *deleg_when)
766 {
767 __be32 *p;
768 u32 w;
769
770 READ_BUF(4);
771 w = be32_to_cpup(p++);
772 *share_access = w & NFS4_SHARE_ACCESS_MASK;
773 *deleg_want = w & NFS4_SHARE_WANT_MASK;
774 if (deleg_when)
775 *deleg_when = w & NFS4_SHARE_WHEN_MASK;
776
777 switch (w & NFS4_SHARE_ACCESS_MASK) {
778 case NFS4_SHARE_ACCESS_READ:
779 case NFS4_SHARE_ACCESS_WRITE:
780 case NFS4_SHARE_ACCESS_BOTH:
781 break;
782 default:
783 return nfserr_bad_xdr;
784 }
785 w &= ~NFS4_SHARE_ACCESS_MASK;
786 if (!w)
787 return nfs_ok;
788 if (!argp->minorversion)
789 return nfserr_bad_xdr;
790 switch (w & NFS4_SHARE_WANT_MASK) {
791 case NFS4_SHARE_WANT_NO_PREFERENCE:
792 case NFS4_SHARE_WANT_READ_DELEG:
793 case NFS4_SHARE_WANT_WRITE_DELEG:
794 case NFS4_SHARE_WANT_ANY_DELEG:
795 case NFS4_SHARE_WANT_NO_DELEG:
796 case NFS4_SHARE_WANT_CANCEL:
797 break;
798 default:
799 return nfserr_bad_xdr;
800 }
801 w &= ~NFS4_SHARE_WANT_MASK;
802 if (!w)
803 return nfs_ok;
804
805 if (!deleg_when) /* open_downgrade */
806 return nfserr_inval;
807 switch (w) {
808 case NFS4_SHARE_SIGNAL_DELEG_WHEN_RESRC_AVAIL:
809 case NFS4_SHARE_PUSH_DELEG_WHEN_UNCONTENDED:
810 case (NFS4_SHARE_SIGNAL_DELEG_WHEN_RESRC_AVAIL |
811 NFS4_SHARE_PUSH_DELEG_WHEN_UNCONTENDED):
812 return nfs_ok;
813 }
814 xdr_error:
815 return nfserr_bad_xdr;
816 }
817
818 static __be32 nfsd4_decode_share_deny(struct nfsd4_compoundargs *argp, u32 *x)
819 {
820 __be32 *p;
821
822 READ_BUF(4);
823 *x = be32_to_cpup(p++);
824 /* Note: unlinke access bits, deny bits may be zero. */
825 if (*x & ~NFS4_SHARE_DENY_BOTH)
826 return nfserr_bad_xdr;
827 return nfs_ok;
828 xdr_error:
829 return nfserr_bad_xdr;
830 }
831
832 static __be32 nfsd4_decode_opaque(struct nfsd4_compoundargs *argp, struct xdr_netobj *o)
833 {
834 __be32 *p;
835
836 READ_BUF(4);
837 o->len = be32_to_cpup(p++);
838
839 if (o->len == 0 || o->len > NFS4_OPAQUE_LIMIT)
840 return nfserr_bad_xdr;
841
842 READ_BUF(o->len);
843 SAVEMEM(o->data, o->len);
844 return nfs_ok;
845 xdr_error:
846 return nfserr_bad_xdr;
847 }
848
849 static __be32
850 nfsd4_decode_open(struct nfsd4_compoundargs *argp, struct nfsd4_open *open)
851 {
852 DECODE_HEAD;
853 u32 dummy;
854
855 memset(open->op_bmval, 0, sizeof(open->op_bmval));
856 open->op_iattr.ia_valid = 0;
857 open->op_openowner = NULL;
858
859 open->op_xdr_error = 0;
860 /* seqid, share_access, share_deny, clientid, ownerlen */
861 READ_BUF(4);
862 open->op_seqid = be32_to_cpup(p++);
863 /* decode, yet ignore deleg_when until supported */
864 status = nfsd4_decode_share_access(argp, &open->op_share_access,
865 &open->op_deleg_want, &dummy);
866 if (status)
867 goto xdr_error;
868 status = nfsd4_decode_share_deny(argp, &open->op_share_deny);
869 if (status)
870 goto xdr_error;
871 READ_BUF(sizeof(clientid_t));
872 COPYMEM(&open->op_clientid, sizeof(clientid_t));
873 status = nfsd4_decode_opaque(argp, &open->op_owner);
874 if (status)
875 goto xdr_error;
876 READ_BUF(4);
877 open->op_create = be32_to_cpup(p++);
878 switch (open->op_create) {
879 case NFS4_OPEN_NOCREATE:
880 break;
881 case NFS4_OPEN_CREATE:
882 READ_BUF(4);
883 open->op_createmode = be32_to_cpup(p++);
884 switch (open->op_createmode) {
885 case NFS4_CREATE_UNCHECKED:
886 case NFS4_CREATE_GUARDED:
887 status = nfsd4_decode_fattr(argp, open->op_bmval,
888 &open->op_iattr, &open->op_acl, &open->op_label);
889 if (status)
890 goto out;
891 break;
892 case NFS4_CREATE_EXCLUSIVE:
893 READ_BUF(NFS4_VERIFIER_SIZE);
894 COPYMEM(open->op_verf.data, NFS4_VERIFIER_SIZE);
895 break;
896 case NFS4_CREATE_EXCLUSIVE4_1:
897 if (argp->minorversion < 1)
898 goto xdr_error;
899 READ_BUF(NFS4_VERIFIER_SIZE);
900 COPYMEM(open->op_verf.data, NFS4_VERIFIER_SIZE);
901 status = nfsd4_decode_fattr(argp, open->op_bmval,
902 &open->op_iattr, &open->op_acl, &open->op_label);
903 if (status)
904 goto out;
905 break;
906 default:
907 goto xdr_error;
908 }
909 break;
910 default:
911 goto xdr_error;
912 }
913
914 /* open_claim */
915 READ_BUF(4);
916 open->op_claim_type = be32_to_cpup(p++);
917 switch (open->op_claim_type) {
918 case NFS4_OPEN_CLAIM_NULL:
919 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
920 READ_BUF(4);
921 open->op_fname.len = be32_to_cpup(p++);
922 READ_BUF(open->op_fname.len);
923 SAVEMEM(open->op_fname.data, open->op_fname.len);
924 if ((status = check_filename(open->op_fname.data, open->op_fname.len)))
925 return status;
926 break;
927 case NFS4_OPEN_CLAIM_PREVIOUS:
928 READ_BUF(4);
929 open->op_delegate_type = be32_to_cpup(p++);
930 break;
931 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
932 status = nfsd4_decode_stateid(argp, &open->op_delegate_stateid);
933 if (status)
934 return status;
935 READ_BUF(4);
936 open->op_fname.len = be32_to_cpup(p++);
937 READ_BUF(open->op_fname.len);
938 SAVEMEM(open->op_fname.data, open->op_fname.len);
939 if ((status = check_filename(open->op_fname.data, open->op_fname.len)))
940 return status;
941 break;
942 case NFS4_OPEN_CLAIM_FH:
943 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
944 if (argp->minorversion < 1)
945 goto xdr_error;
946 /* void */
947 break;
948 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
949 if (argp->minorversion < 1)
950 goto xdr_error;
951 status = nfsd4_decode_stateid(argp, &open->op_delegate_stateid);
952 if (status)
953 return status;
954 break;
955 default:
956 goto xdr_error;
957 }
958
959 DECODE_TAIL;
960 }
961
962 static __be32
963 nfsd4_decode_open_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_open_confirm *open_conf)
964 {
965 DECODE_HEAD;
966
967 if (argp->minorversion >= 1)
968 return nfserr_notsupp;
969
970 status = nfsd4_decode_stateid(argp, &open_conf->oc_req_stateid);
971 if (status)
972 return status;
973 READ_BUF(4);
974 open_conf->oc_seqid = be32_to_cpup(p++);
975
976 DECODE_TAIL;
977 }
978
979 static __be32
980 nfsd4_decode_open_downgrade(struct nfsd4_compoundargs *argp, struct nfsd4_open_downgrade *open_down)
981 {
982 DECODE_HEAD;
983
984 status = nfsd4_decode_stateid(argp, &open_down->od_stateid);
985 if (status)
986 return status;
987 READ_BUF(4);
988 open_down->od_seqid = be32_to_cpup(p++);
989 status = nfsd4_decode_share_access(argp, &open_down->od_share_access,
990 &open_down->od_deleg_want, NULL);
991 if (status)
992 return status;
993 status = nfsd4_decode_share_deny(argp, &open_down->od_share_deny);
994 if (status)
995 return status;
996 DECODE_TAIL;
997 }
998
999 static __be32
1000 nfsd4_decode_putfh(struct nfsd4_compoundargs *argp, struct nfsd4_putfh *putfh)
1001 {
1002 DECODE_HEAD;
1003
1004 READ_BUF(4);
1005 putfh->pf_fhlen = be32_to_cpup(p++);
1006 if (putfh->pf_fhlen > NFS4_FHSIZE)
1007 goto xdr_error;
1008 READ_BUF(putfh->pf_fhlen);
1009 SAVEMEM(putfh->pf_fhval, putfh->pf_fhlen);
1010
1011 DECODE_TAIL;
1012 }
1013
1014 static __be32
1015 nfsd4_decode_putpubfh(struct nfsd4_compoundargs *argp, void *p)
1016 {
1017 if (argp->minorversion == 0)
1018 return nfs_ok;
1019 return nfserr_notsupp;
1020 }
1021
1022 static __be32
1023 nfsd4_decode_read(struct nfsd4_compoundargs *argp, struct nfsd4_read *read)
1024 {
1025 DECODE_HEAD;
1026
1027 status = nfsd4_decode_stateid(argp, &read->rd_stateid);
1028 if (status)
1029 return status;
1030 READ_BUF(12);
1031 p = xdr_decode_hyper(p, &read->rd_offset);
1032 read->rd_length = be32_to_cpup(p++);
1033
1034 DECODE_TAIL;
1035 }
1036
1037 static __be32
1038 nfsd4_decode_readdir(struct nfsd4_compoundargs *argp, struct nfsd4_readdir *readdir)
1039 {
1040 DECODE_HEAD;
1041
1042 READ_BUF(24);
1043 p = xdr_decode_hyper(p, &readdir->rd_cookie);
1044 COPYMEM(readdir->rd_verf.data, sizeof(readdir->rd_verf.data));
1045 readdir->rd_dircount = be32_to_cpup(p++);
1046 readdir->rd_maxcount = be32_to_cpup(p++);
1047 if ((status = nfsd4_decode_bitmap(argp, readdir->rd_bmval)))
1048 goto out;
1049
1050 DECODE_TAIL;
1051 }
1052
1053 static __be32
1054 nfsd4_decode_remove(struct nfsd4_compoundargs *argp, struct nfsd4_remove *remove)
1055 {
1056 DECODE_HEAD;
1057
1058 READ_BUF(4);
1059 remove->rm_namelen = be32_to_cpup(p++);
1060 READ_BUF(remove->rm_namelen);
1061 SAVEMEM(remove->rm_name, remove->rm_namelen);
1062 if ((status = check_filename(remove->rm_name, remove->rm_namelen)))
1063 return status;
1064
1065 DECODE_TAIL;
1066 }
1067
1068 static __be32
1069 nfsd4_decode_rename(struct nfsd4_compoundargs *argp, struct nfsd4_rename *rename)
1070 {
1071 DECODE_HEAD;
1072
1073 READ_BUF(4);
1074 rename->rn_snamelen = be32_to_cpup(p++);
1075 READ_BUF(rename->rn_snamelen);
1076 SAVEMEM(rename->rn_sname, rename->rn_snamelen);
1077 READ_BUF(4);
1078 rename->rn_tnamelen = be32_to_cpup(p++);
1079 READ_BUF(rename->rn_tnamelen);
1080 SAVEMEM(rename->rn_tname, rename->rn_tnamelen);
1081 if ((status = check_filename(rename->rn_sname, rename->rn_snamelen)))
1082 return status;
1083 if ((status = check_filename(rename->rn_tname, rename->rn_tnamelen)))
1084 return status;
1085
1086 DECODE_TAIL;
1087 }
1088
1089 static __be32
1090 nfsd4_decode_renew(struct nfsd4_compoundargs *argp, clientid_t *clientid)
1091 {
1092 DECODE_HEAD;
1093
1094 if (argp->minorversion >= 1)
1095 return nfserr_notsupp;
1096
1097 READ_BUF(sizeof(clientid_t));
1098 COPYMEM(clientid, sizeof(clientid_t));
1099
1100 DECODE_TAIL;
1101 }
1102
1103 static __be32
1104 nfsd4_decode_secinfo(struct nfsd4_compoundargs *argp,
1105 struct nfsd4_secinfo *secinfo)
1106 {
1107 DECODE_HEAD;
1108
1109 READ_BUF(4);
1110 secinfo->si_namelen = be32_to_cpup(p++);
1111 READ_BUF(secinfo->si_namelen);
1112 SAVEMEM(secinfo->si_name, secinfo->si_namelen);
1113 status = check_filename(secinfo->si_name, secinfo->si_namelen);
1114 if (status)
1115 return status;
1116 DECODE_TAIL;
1117 }
1118
1119 static __be32
1120 nfsd4_decode_secinfo_no_name(struct nfsd4_compoundargs *argp,
1121 struct nfsd4_secinfo_no_name *sin)
1122 {
1123 DECODE_HEAD;
1124
1125 READ_BUF(4);
1126 sin->sin_style = be32_to_cpup(p++);
1127 DECODE_TAIL;
1128 }
1129
1130 static __be32
1131 nfsd4_decode_setattr(struct nfsd4_compoundargs *argp, struct nfsd4_setattr *setattr)
1132 {
1133 __be32 status;
1134
1135 status = nfsd4_decode_stateid(argp, &setattr->sa_stateid);
1136 if (status)
1137 return status;
1138 return nfsd4_decode_fattr(argp, setattr->sa_bmval, &setattr->sa_iattr,
1139 &setattr->sa_acl, &setattr->sa_label);
1140 }
1141
1142 static __be32
1143 nfsd4_decode_setclientid(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid *setclientid)
1144 {
1145 DECODE_HEAD;
1146
1147 if (argp->minorversion >= 1)
1148 return nfserr_notsupp;
1149
1150 READ_BUF(NFS4_VERIFIER_SIZE);
1151 COPYMEM(setclientid->se_verf.data, NFS4_VERIFIER_SIZE);
1152
1153 status = nfsd4_decode_opaque(argp, &setclientid->se_name);
1154 if (status)
1155 return nfserr_bad_xdr;
1156 READ_BUF(8);
1157 setclientid->se_callback_prog = be32_to_cpup(p++);
1158 setclientid->se_callback_netid_len = be32_to_cpup(p++);
1159 READ_BUF(setclientid->se_callback_netid_len);
1160 SAVEMEM(setclientid->se_callback_netid_val, setclientid->se_callback_netid_len);
1161 READ_BUF(4);
1162 setclientid->se_callback_addr_len = be32_to_cpup(p++);
1163
1164 READ_BUF(setclientid->se_callback_addr_len);
1165 SAVEMEM(setclientid->se_callback_addr_val, setclientid->se_callback_addr_len);
1166 READ_BUF(4);
1167 setclientid->se_callback_ident = be32_to_cpup(p++);
1168
1169 DECODE_TAIL;
1170 }
1171
1172 static __be32
1173 nfsd4_decode_setclientid_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid_confirm *scd_c)
1174 {
1175 DECODE_HEAD;
1176
1177 if (argp->minorversion >= 1)
1178 return nfserr_notsupp;
1179
1180 READ_BUF(8 + NFS4_VERIFIER_SIZE);
1181 COPYMEM(&scd_c->sc_clientid, 8);
1182 COPYMEM(&scd_c->sc_confirm, NFS4_VERIFIER_SIZE);
1183
1184 DECODE_TAIL;
1185 }
1186
1187 /* Also used for NVERIFY */
1188 static __be32
1189 nfsd4_decode_verify(struct nfsd4_compoundargs *argp, struct nfsd4_verify *verify)
1190 {
1191 DECODE_HEAD;
1192
1193 if ((status = nfsd4_decode_bitmap(argp, verify->ve_bmval)))
1194 goto out;
1195
1196 /* For convenience's sake, we compare raw xdr'd attributes in
1197 * nfsd4_proc_verify */
1198
1199 READ_BUF(4);
1200 verify->ve_attrlen = be32_to_cpup(p++);
1201 READ_BUF(verify->ve_attrlen);
1202 SAVEMEM(verify->ve_attrval, verify->ve_attrlen);
1203
1204 DECODE_TAIL;
1205 }
1206
1207 static __be32
1208 nfsd4_decode_write(struct nfsd4_compoundargs *argp, struct nfsd4_write *write)
1209 {
1210 int avail;
1211 int len;
1212 DECODE_HEAD;
1213
1214 status = nfsd4_decode_stateid(argp, &write->wr_stateid);
1215 if (status)
1216 return status;
1217 READ_BUF(16);
1218 p = xdr_decode_hyper(p, &write->wr_offset);
1219 write->wr_stable_how = be32_to_cpup(p++);
1220 if (write->wr_stable_how > 2)
1221 goto xdr_error;
1222 write->wr_buflen = be32_to_cpup(p++);
1223
1224 /* Sorry .. no magic macros for this.. *
1225 * READ_BUF(write->wr_buflen);
1226 * SAVEMEM(write->wr_buf, write->wr_buflen);
1227 */
1228 avail = (char*)argp->end - (char*)argp->p;
1229 if (avail + argp->pagelen < write->wr_buflen) {
1230 dprintk("NFSD: xdr error (%s:%d)\n",
1231 __FILE__, __LINE__);
1232 goto xdr_error;
1233 }
1234 write->wr_head.iov_base = p;
1235 write->wr_head.iov_len = avail;
1236 write->wr_pagelist = argp->pagelist;
1237
1238 len = XDR_QUADLEN(write->wr_buflen) << 2;
1239 if (len >= avail) {
1240 int pages;
1241
1242 len -= avail;
1243
1244 pages = len >> PAGE_SHIFT;
1245 argp->pagelist += pages;
1246 argp->pagelen -= pages * PAGE_SIZE;
1247 len -= pages * PAGE_SIZE;
1248
1249 argp->p = (__be32 *)page_address(argp->pagelist[0]);
1250 argp->pagelist++;
1251 argp->end = argp->p + XDR_QUADLEN(PAGE_SIZE);
1252 }
1253 argp->p += XDR_QUADLEN(len);
1254
1255 DECODE_TAIL;
1256 }
1257
1258 static __be32
1259 nfsd4_decode_release_lockowner(struct nfsd4_compoundargs *argp, struct nfsd4_release_lockowner *rlockowner)
1260 {
1261 DECODE_HEAD;
1262
1263 if (argp->minorversion >= 1)
1264 return nfserr_notsupp;
1265
1266 READ_BUF(12);
1267 COPYMEM(&rlockowner->rl_clientid, sizeof(clientid_t));
1268 rlockowner->rl_owner.len = be32_to_cpup(p++);
1269 READ_BUF(rlockowner->rl_owner.len);
1270 READMEM(rlockowner->rl_owner.data, rlockowner->rl_owner.len);
1271
1272 if (argp->minorversion && !zero_clientid(&rlockowner->rl_clientid))
1273 return nfserr_inval;
1274 DECODE_TAIL;
1275 }
1276
1277 static __be32
1278 nfsd4_decode_exchange_id(struct nfsd4_compoundargs *argp,
1279 struct nfsd4_exchange_id *exid)
1280 {
1281 int dummy, tmp;
1282 DECODE_HEAD;
1283
1284 READ_BUF(NFS4_VERIFIER_SIZE);
1285 COPYMEM(exid->verifier.data, NFS4_VERIFIER_SIZE);
1286
1287 status = nfsd4_decode_opaque(argp, &exid->clname);
1288 if (status)
1289 return nfserr_bad_xdr;
1290
1291 READ_BUF(4);
1292 exid->flags = be32_to_cpup(p++);
1293
1294 /* Ignore state_protect4_a */
1295 READ_BUF(4);
1296 exid->spa_how = be32_to_cpup(p++);
1297 switch (exid->spa_how) {
1298 case SP4_NONE:
1299 break;
1300 case SP4_MACH_CRED:
1301 /* spo_must_enforce */
1302 status = nfsd4_decode_bitmap(argp,
1303 exid->spo_must_enforce);
1304 if (status)
1305 goto out;
1306 /* spo_must_allow */
1307 status = nfsd4_decode_bitmap(argp, exid->spo_must_allow);
1308 if (status)
1309 goto out;
1310 break;
1311 case SP4_SSV:
1312 /* ssp_ops */
1313 READ_BUF(4);
1314 dummy = be32_to_cpup(p++);
1315 READ_BUF(dummy * 4);
1316 p += dummy;
1317
1318 READ_BUF(4);
1319 dummy = be32_to_cpup(p++);
1320 READ_BUF(dummy * 4);
1321 p += dummy;
1322
1323 /* ssp_hash_algs<> */
1324 READ_BUF(4);
1325 tmp = be32_to_cpup(p++);
1326 while (tmp--) {
1327 READ_BUF(4);
1328 dummy = be32_to_cpup(p++);
1329 READ_BUF(dummy);
1330 p += XDR_QUADLEN(dummy);
1331 }
1332
1333 /* ssp_encr_algs<> */
1334 READ_BUF(4);
1335 tmp = be32_to_cpup(p++);
1336 while (tmp--) {
1337 READ_BUF(4);
1338 dummy = be32_to_cpup(p++);
1339 READ_BUF(dummy);
1340 p += XDR_QUADLEN(dummy);
1341 }
1342
1343 /* ssp_window and ssp_num_gss_handles */
1344 READ_BUF(8);
1345 dummy = be32_to_cpup(p++);
1346 dummy = be32_to_cpup(p++);
1347 break;
1348 default:
1349 goto xdr_error;
1350 }
1351
1352 /* Ignore Implementation ID */
1353 READ_BUF(4); /* nfs_impl_id4 array length */
1354 dummy = be32_to_cpup(p++);
1355
1356 if (dummy > 1)
1357 goto xdr_error;
1358
1359 if (dummy == 1) {
1360 /* nii_domain */
1361 READ_BUF(4);
1362 dummy = be32_to_cpup(p++);
1363 READ_BUF(dummy);
1364 p += XDR_QUADLEN(dummy);
1365
1366 /* nii_name */
1367 READ_BUF(4);
1368 dummy = be32_to_cpup(p++);
1369 READ_BUF(dummy);
1370 p += XDR_QUADLEN(dummy);
1371
1372 /* nii_date */
1373 READ_BUF(12);
1374 p += 3;
1375 }
1376 DECODE_TAIL;
1377 }
1378
1379 static __be32
1380 nfsd4_decode_create_session(struct nfsd4_compoundargs *argp,
1381 struct nfsd4_create_session *sess)
1382 {
1383 DECODE_HEAD;
1384 u32 dummy;
1385
1386 READ_BUF(16);
1387 COPYMEM(&sess->clientid, 8);
1388 sess->seqid = be32_to_cpup(p++);
1389 sess->flags = be32_to_cpup(p++);
1390
1391 /* Fore channel attrs */
1392 READ_BUF(28);
1393 dummy = be32_to_cpup(p++); /* headerpadsz is always 0 */
1394 sess->fore_channel.maxreq_sz = be32_to_cpup(p++);
1395 sess->fore_channel.maxresp_sz = be32_to_cpup(p++);
1396 sess->fore_channel.maxresp_cached = be32_to_cpup(p++);
1397 sess->fore_channel.maxops = be32_to_cpup(p++);
1398 sess->fore_channel.maxreqs = be32_to_cpup(p++);
1399 sess->fore_channel.nr_rdma_attrs = be32_to_cpup(p++);
1400 if (sess->fore_channel.nr_rdma_attrs == 1) {
1401 READ_BUF(4);
1402 sess->fore_channel.rdma_attrs = be32_to_cpup(p++);
1403 } else if (sess->fore_channel.nr_rdma_attrs > 1) {
1404 dprintk("Too many fore channel attr bitmaps!\n");
1405 goto xdr_error;
1406 }
1407
1408 /* Back channel attrs */
1409 READ_BUF(28);
1410 dummy = be32_to_cpup(p++); /* headerpadsz is always 0 */
1411 sess->back_channel.maxreq_sz = be32_to_cpup(p++);
1412 sess->back_channel.maxresp_sz = be32_to_cpup(p++);
1413 sess->back_channel.maxresp_cached = be32_to_cpup(p++);
1414 sess->back_channel.maxops = be32_to_cpup(p++);
1415 sess->back_channel.maxreqs = be32_to_cpup(p++);
1416 sess->back_channel.nr_rdma_attrs = be32_to_cpup(p++);
1417 if (sess->back_channel.nr_rdma_attrs == 1) {
1418 READ_BUF(4);
1419 sess->back_channel.rdma_attrs = be32_to_cpup(p++);
1420 } else if (sess->back_channel.nr_rdma_attrs > 1) {
1421 dprintk("Too many back channel attr bitmaps!\n");
1422 goto xdr_error;
1423 }
1424
1425 READ_BUF(4);
1426 sess->callback_prog = be32_to_cpup(p++);
1427 nfsd4_decode_cb_sec(argp, &sess->cb_sec);
1428 DECODE_TAIL;
1429 }
1430
1431 static __be32
1432 nfsd4_decode_destroy_session(struct nfsd4_compoundargs *argp,
1433 struct nfsd4_destroy_session *destroy_session)
1434 {
1435 DECODE_HEAD;
1436 READ_BUF(NFS4_MAX_SESSIONID_LEN);
1437 COPYMEM(destroy_session->sessionid.data, NFS4_MAX_SESSIONID_LEN);
1438
1439 DECODE_TAIL;
1440 }
1441
1442 static __be32
1443 nfsd4_decode_free_stateid(struct nfsd4_compoundargs *argp,
1444 struct nfsd4_free_stateid *free_stateid)
1445 {
1446 DECODE_HEAD;
1447
1448 READ_BUF(sizeof(stateid_t));
1449 free_stateid->fr_stateid.si_generation = be32_to_cpup(p++);
1450 COPYMEM(&free_stateid->fr_stateid.si_opaque, sizeof(stateid_opaque_t));
1451
1452 DECODE_TAIL;
1453 }
1454
1455 static __be32
1456 nfsd4_decode_sequence(struct nfsd4_compoundargs *argp,
1457 struct nfsd4_sequence *seq)
1458 {
1459 DECODE_HEAD;
1460
1461 READ_BUF(NFS4_MAX_SESSIONID_LEN + 16);
1462 COPYMEM(seq->sessionid.data, NFS4_MAX_SESSIONID_LEN);
1463 seq->seqid = be32_to_cpup(p++);
1464 seq->slotid = be32_to_cpup(p++);
1465 seq->maxslots = be32_to_cpup(p++);
1466 seq->cachethis = be32_to_cpup(p++);
1467
1468 DECODE_TAIL;
1469 }
1470
1471 static __be32
1472 nfsd4_decode_test_stateid(struct nfsd4_compoundargs *argp, struct nfsd4_test_stateid *test_stateid)
1473 {
1474 int i;
1475 __be32 *p, status;
1476 struct nfsd4_test_stateid_id *stateid;
1477
1478 READ_BUF(4);
1479 test_stateid->ts_num_ids = ntohl(*p++);
1480
1481 INIT_LIST_HEAD(&test_stateid->ts_stateid_list);
1482
1483 for (i = 0; i < test_stateid->ts_num_ids; i++) {
1484 stateid = svcxdr_tmpalloc(argp, sizeof(*stateid));
1485 if (!stateid) {
1486 status = nfserrno(-ENOMEM);
1487 goto out;
1488 }
1489
1490 INIT_LIST_HEAD(&stateid->ts_id_list);
1491 list_add_tail(&stateid->ts_id_list, &test_stateid->ts_stateid_list);
1492
1493 status = nfsd4_decode_stateid(argp, &stateid->ts_id_stateid);
1494 if (status)
1495 goto out;
1496 }
1497
1498 status = 0;
1499 out:
1500 return status;
1501 xdr_error:
1502 dprintk("NFSD: xdr error (%s:%d)\n", __FILE__, __LINE__);
1503 status = nfserr_bad_xdr;
1504 goto out;
1505 }
1506
1507 static __be32 nfsd4_decode_destroy_clientid(struct nfsd4_compoundargs *argp, struct nfsd4_destroy_clientid *dc)
1508 {
1509 DECODE_HEAD;
1510
1511 READ_BUF(8);
1512 COPYMEM(&dc->clientid, 8);
1513
1514 DECODE_TAIL;
1515 }
1516
1517 static __be32 nfsd4_decode_reclaim_complete(struct nfsd4_compoundargs *argp, struct nfsd4_reclaim_complete *rc)
1518 {
1519 DECODE_HEAD;
1520
1521 READ_BUF(4);
1522 rc->rca_one_fs = be32_to_cpup(p++);
1523
1524 DECODE_TAIL;
1525 }
1526
1527 #ifdef CONFIG_NFSD_PNFS
1528 static __be32
1529 nfsd4_decode_getdeviceinfo(struct nfsd4_compoundargs *argp,
1530 struct nfsd4_getdeviceinfo *gdev)
1531 {
1532 DECODE_HEAD;
1533 u32 num, i;
1534
1535 READ_BUF(sizeof(struct nfsd4_deviceid) + 3 * 4);
1536 COPYMEM(&gdev->gd_devid, sizeof(struct nfsd4_deviceid));
1537 gdev->gd_layout_type = be32_to_cpup(p++);
1538 gdev->gd_maxcount = be32_to_cpup(p++);
1539 num = be32_to_cpup(p++);
1540 if (num) {
1541 READ_BUF(4 * num);
1542 gdev->gd_notify_types = be32_to_cpup(p++);
1543 for (i = 1; i < num; i++) {
1544 if (be32_to_cpup(p++)) {
1545 status = nfserr_inval;
1546 goto out;
1547 }
1548 }
1549 }
1550 DECODE_TAIL;
1551 }
1552
1553 static __be32
1554 nfsd4_decode_layoutget(struct nfsd4_compoundargs *argp,
1555 struct nfsd4_layoutget *lgp)
1556 {
1557 DECODE_HEAD;
1558
1559 READ_BUF(36);
1560 lgp->lg_signal = be32_to_cpup(p++);
1561 lgp->lg_layout_type = be32_to_cpup(p++);
1562 lgp->lg_seg.iomode = be32_to_cpup(p++);
1563 p = xdr_decode_hyper(p, &lgp->lg_seg.offset);
1564 p = xdr_decode_hyper(p, &lgp->lg_seg.length);
1565 p = xdr_decode_hyper(p, &lgp->lg_minlength);
1566
1567 status = nfsd4_decode_stateid(argp, &lgp->lg_sid);
1568 if (status)
1569 return status;
1570
1571 READ_BUF(4);
1572 lgp->lg_maxcount = be32_to_cpup(p++);
1573
1574 DECODE_TAIL;
1575 }
1576
1577 static __be32
1578 nfsd4_decode_layoutcommit(struct nfsd4_compoundargs *argp,
1579 struct nfsd4_layoutcommit *lcp)
1580 {
1581 DECODE_HEAD;
1582 u32 timechange;
1583
1584 READ_BUF(20);
1585 p = xdr_decode_hyper(p, &lcp->lc_seg.offset);
1586 p = xdr_decode_hyper(p, &lcp->lc_seg.length);
1587 lcp->lc_reclaim = be32_to_cpup(p++);
1588
1589 status = nfsd4_decode_stateid(argp, &lcp->lc_sid);
1590 if (status)
1591 return status;
1592
1593 READ_BUF(4);
1594 lcp->lc_newoffset = be32_to_cpup(p++);
1595 if (lcp->lc_newoffset) {
1596 READ_BUF(8);
1597 p = xdr_decode_hyper(p, &lcp->lc_last_wr);
1598 } else
1599 lcp->lc_last_wr = 0;
1600 READ_BUF(4);
1601 timechange = be32_to_cpup(p++);
1602 if (timechange) {
1603 status = nfsd4_decode_time(argp, &lcp->lc_mtime);
1604 if (status)
1605 return status;
1606 } else {
1607 lcp->lc_mtime.tv_nsec = UTIME_NOW;
1608 }
1609 READ_BUF(8);
1610 lcp->lc_layout_type = be32_to_cpup(p++);
1611
1612 /*
1613 * Save the layout update in XDR format and let the layout driver deal
1614 * with it later.
1615 */
1616 lcp->lc_up_len = be32_to_cpup(p++);
1617 if (lcp->lc_up_len > 0) {
1618 READ_BUF(lcp->lc_up_len);
1619 READMEM(lcp->lc_up_layout, lcp->lc_up_len);
1620 }
1621
1622 DECODE_TAIL;
1623 }
1624
1625 static __be32
1626 nfsd4_decode_layoutreturn(struct nfsd4_compoundargs *argp,
1627 struct nfsd4_layoutreturn *lrp)
1628 {
1629 DECODE_HEAD;
1630
1631 READ_BUF(16);
1632 lrp->lr_reclaim = be32_to_cpup(p++);
1633 lrp->lr_layout_type = be32_to_cpup(p++);
1634 lrp->lr_seg.iomode = be32_to_cpup(p++);
1635 lrp->lr_return_type = be32_to_cpup(p++);
1636 if (lrp->lr_return_type == RETURN_FILE) {
1637 READ_BUF(16);
1638 p = xdr_decode_hyper(p, &lrp->lr_seg.offset);
1639 p = xdr_decode_hyper(p, &lrp->lr_seg.length);
1640
1641 status = nfsd4_decode_stateid(argp, &lrp->lr_sid);
1642 if (status)
1643 return status;
1644
1645 READ_BUF(4);
1646 lrp->lrf_body_len = be32_to_cpup(p++);
1647 if (lrp->lrf_body_len > 0) {
1648 READ_BUF(lrp->lrf_body_len);
1649 READMEM(lrp->lrf_body, lrp->lrf_body_len);
1650 }
1651 } else {
1652 lrp->lr_seg.offset = 0;
1653 lrp->lr_seg.length = NFS4_MAX_UINT64;
1654 }
1655
1656 DECODE_TAIL;
1657 }
1658 #endif /* CONFIG_NFSD_PNFS */
1659
1660 static __be32
1661 nfsd4_decode_fallocate(struct nfsd4_compoundargs *argp,
1662 struct nfsd4_fallocate *fallocate)
1663 {
1664 DECODE_HEAD;
1665
1666 status = nfsd4_decode_stateid(argp, &fallocate->falloc_stateid);
1667 if (status)
1668 return status;
1669
1670 READ_BUF(16);
1671 p = xdr_decode_hyper(p, &fallocate->falloc_offset);
1672 xdr_decode_hyper(p, &fallocate->falloc_length);
1673
1674 DECODE_TAIL;
1675 }
1676
1677 static __be32
1678 nfsd4_decode_clone(struct nfsd4_compoundargs *argp, struct nfsd4_clone *clone)
1679 {
1680 DECODE_HEAD;
1681
1682 status = nfsd4_decode_stateid(argp, &clone->cl_src_stateid);
1683 if (status)
1684 return status;
1685 status = nfsd4_decode_stateid(argp, &clone->cl_dst_stateid);
1686 if (status)
1687 return status;
1688
1689 READ_BUF(8 + 8 + 8);
1690 p = xdr_decode_hyper(p, &clone->cl_src_pos);
1691 p = xdr_decode_hyper(p, &clone->cl_dst_pos);
1692 p = xdr_decode_hyper(p, &clone->cl_count);
1693 DECODE_TAIL;
1694 }
1695
1696 static __be32
1697 nfsd4_decode_seek(struct nfsd4_compoundargs *argp, struct nfsd4_seek *seek)
1698 {
1699 DECODE_HEAD;
1700
1701 status = nfsd4_decode_stateid(argp, &seek->seek_stateid);
1702 if (status)
1703 return status;
1704
1705 READ_BUF(8 + 4);
1706 p = xdr_decode_hyper(p, &seek->seek_offset);
1707 seek->seek_whence = be32_to_cpup(p);
1708
1709 DECODE_TAIL;
1710 }
1711
1712 static __be32
1713 nfsd4_decode_noop(struct nfsd4_compoundargs *argp, void *p)
1714 {
1715 return nfs_ok;
1716 }
1717
1718 static __be32
1719 nfsd4_decode_notsupp(struct nfsd4_compoundargs *argp, void *p)
1720 {
1721 return nfserr_notsupp;
1722 }
1723
1724 typedef __be32(*nfsd4_dec)(struct nfsd4_compoundargs *argp, void *);
1725
1726 static nfsd4_dec nfsd4_dec_ops[] = {
1727 [OP_ACCESS] = (nfsd4_dec)nfsd4_decode_access,
1728 [OP_CLOSE] = (nfsd4_dec)nfsd4_decode_close,
1729 [OP_COMMIT] = (nfsd4_dec)nfsd4_decode_commit,
1730 [OP_CREATE] = (nfsd4_dec)nfsd4_decode_create,
1731 [OP_DELEGPURGE] = (nfsd4_dec)nfsd4_decode_notsupp,
1732 [OP_DELEGRETURN] = (nfsd4_dec)nfsd4_decode_delegreturn,
1733 [OP_GETATTR] = (nfsd4_dec)nfsd4_decode_getattr,
1734 [OP_GETFH] = (nfsd4_dec)nfsd4_decode_noop,
1735 [OP_LINK] = (nfsd4_dec)nfsd4_decode_link,
1736 [OP_LOCK] = (nfsd4_dec)nfsd4_decode_lock,
1737 [OP_LOCKT] = (nfsd4_dec)nfsd4_decode_lockt,
1738 [OP_LOCKU] = (nfsd4_dec)nfsd4_decode_locku,
1739 [OP_LOOKUP] = (nfsd4_dec)nfsd4_decode_lookup,
1740 [OP_LOOKUPP] = (nfsd4_dec)nfsd4_decode_noop,
1741 [OP_NVERIFY] = (nfsd4_dec)nfsd4_decode_verify,
1742 [OP_OPEN] = (nfsd4_dec)nfsd4_decode_open,
1743 [OP_OPENATTR] = (nfsd4_dec)nfsd4_decode_notsupp,
1744 [OP_OPEN_CONFIRM] = (nfsd4_dec)nfsd4_decode_open_confirm,
1745 [OP_OPEN_DOWNGRADE] = (nfsd4_dec)nfsd4_decode_open_downgrade,
1746 [OP_PUTFH] = (nfsd4_dec)nfsd4_decode_putfh,
1747 [OP_PUTPUBFH] = (nfsd4_dec)nfsd4_decode_putpubfh,
1748 [OP_PUTROOTFH] = (nfsd4_dec)nfsd4_decode_noop,
1749 [OP_READ] = (nfsd4_dec)nfsd4_decode_read,
1750 [OP_READDIR] = (nfsd4_dec)nfsd4_decode_readdir,
1751 [OP_READLINK] = (nfsd4_dec)nfsd4_decode_noop,
1752 [OP_REMOVE] = (nfsd4_dec)nfsd4_decode_remove,
1753 [OP_RENAME] = (nfsd4_dec)nfsd4_decode_rename,
1754 [OP_RENEW] = (nfsd4_dec)nfsd4_decode_renew,
1755 [OP_RESTOREFH] = (nfsd4_dec)nfsd4_decode_noop,
1756 [OP_SAVEFH] = (nfsd4_dec)nfsd4_decode_noop,
1757 [OP_SECINFO] = (nfsd4_dec)nfsd4_decode_secinfo,
1758 [OP_SETATTR] = (nfsd4_dec)nfsd4_decode_setattr,
1759 [OP_SETCLIENTID] = (nfsd4_dec)nfsd4_decode_setclientid,
1760 [OP_SETCLIENTID_CONFIRM] = (nfsd4_dec)nfsd4_decode_setclientid_confirm,
1761 [OP_VERIFY] = (nfsd4_dec)nfsd4_decode_verify,
1762 [OP_WRITE] = (nfsd4_dec)nfsd4_decode_write,
1763 [OP_RELEASE_LOCKOWNER] = (nfsd4_dec)nfsd4_decode_release_lockowner,
1764
1765 /* new operations for NFSv4.1 */
1766 [OP_BACKCHANNEL_CTL] = (nfsd4_dec)nfsd4_decode_backchannel_ctl,
1767 [OP_BIND_CONN_TO_SESSION]= (nfsd4_dec)nfsd4_decode_bind_conn_to_session,
1768 [OP_EXCHANGE_ID] = (nfsd4_dec)nfsd4_decode_exchange_id,
1769 [OP_CREATE_SESSION] = (nfsd4_dec)nfsd4_decode_create_session,
1770 [OP_DESTROY_SESSION] = (nfsd4_dec)nfsd4_decode_destroy_session,
1771 [OP_FREE_STATEID] = (nfsd4_dec)nfsd4_decode_free_stateid,
1772 [OP_GET_DIR_DELEGATION] = (nfsd4_dec)nfsd4_decode_notsupp,
1773 #ifdef CONFIG_NFSD_PNFS
1774 [OP_GETDEVICEINFO] = (nfsd4_dec)nfsd4_decode_getdeviceinfo,
1775 [OP_GETDEVICELIST] = (nfsd4_dec)nfsd4_decode_notsupp,
1776 [OP_LAYOUTCOMMIT] = (nfsd4_dec)nfsd4_decode_layoutcommit,
1777 [OP_LAYOUTGET] = (nfsd4_dec)nfsd4_decode_layoutget,
1778 [OP_LAYOUTRETURN] = (nfsd4_dec)nfsd4_decode_layoutreturn,
1779 #else
1780 [OP_GETDEVICEINFO] = (nfsd4_dec)nfsd4_decode_notsupp,
1781 [OP_GETDEVICELIST] = (nfsd4_dec)nfsd4_decode_notsupp,
1782 [OP_LAYOUTCOMMIT] = (nfsd4_dec)nfsd4_decode_notsupp,
1783 [OP_LAYOUTGET] = (nfsd4_dec)nfsd4_decode_notsupp,
1784 [OP_LAYOUTRETURN] = (nfsd4_dec)nfsd4_decode_notsupp,
1785 #endif
1786 [OP_SECINFO_NO_NAME] = (nfsd4_dec)nfsd4_decode_secinfo_no_name,
1787 [OP_SEQUENCE] = (nfsd4_dec)nfsd4_decode_sequence,
1788 [OP_SET_SSV] = (nfsd4_dec)nfsd4_decode_notsupp,
1789 [OP_TEST_STATEID] = (nfsd4_dec)nfsd4_decode_test_stateid,
1790 [OP_WANT_DELEGATION] = (nfsd4_dec)nfsd4_decode_notsupp,
1791 [OP_DESTROY_CLIENTID] = (nfsd4_dec)nfsd4_decode_destroy_clientid,
1792 [OP_RECLAIM_COMPLETE] = (nfsd4_dec)nfsd4_decode_reclaim_complete,
1793
1794 /* new operations for NFSv4.2 */
1795 [OP_ALLOCATE] = (nfsd4_dec)nfsd4_decode_fallocate,
1796 [OP_COPY] = (nfsd4_dec)nfsd4_decode_notsupp,
1797 [OP_COPY_NOTIFY] = (nfsd4_dec)nfsd4_decode_notsupp,
1798 [OP_DEALLOCATE] = (nfsd4_dec)nfsd4_decode_fallocate,
1799 [OP_IO_ADVISE] = (nfsd4_dec)nfsd4_decode_notsupp,
1800 [OP_LAYOUTERROR] = (nfsd4_dec)nfsd4_decode_notsupp,
1801 [OP_LAYOUTSTATS] = (nfsd4_dec)nfsd4_decode_notsupp,
1802 [OP_OFFLOAD_CANCEL] = (nfsd4_dec)nfsd4_decode_notsupp,
1803 [OP_OFFLOAD_STATUS] = (nfsd4_dec)nfsd4_decode_notsupp,
1804 [OP_READ_PLUS] = (nfsd4_dec)nfsd4_decode_notsupp,
1805 [OP_SEEK] = (nfsd4_dec)nfsd4_decode_seek,
1806 [OP_WRITE_SAME] = (nfsd4_dec)nfsd4_decode_notsupp,
1807 [OP_CLONE] = (nfsd4_dec)nfsd4_decode_clone,
1808 };
1809
1810 static inline bool
1811 nfsd4_opnum_in_range(struct nfsd4_compoundargs *argp, struct nfsd4_op *op)
1812 {
1813 if (op->opnum < FIRST_NFS4_OP)
1814 return false;
1815 else if (argp->minorversion == 0 && op->opnum > LAST_NFS40_OP)
1816 return false;
1817 else if (argp->minorversion == 1 && op->opnum > LAST_NFS41_OP)
1818 return false;
1819 else if (argp->minorversion == 2 && op->opnum > LAST_NFS42_OP)
1820 return false;
1821 return true;
1822 }
1823
1824 static __be32
1825 nfsd4_decode_compound(struct nfsd4_compoundargs *argp)
1826 {
1827 DECODE_HEAD;
1828 struct nfsd4_op *op;
1829 bool cachethis = false;
1830 int auth_slack= argp->rqstp->rq_auth_slack;
1831 int max_reply = auth_slack + 8; /* opcnt, status */
1832 int readcount = 0;
1833 int readbytes = 0;
1834 int i;
1835
1836 READ_BUF(4);
1837 argp->taglen = be32_to_cpup(p++);
1838 READ_BUF(argp->taglen);
1839 SAVEMEM(argp->tag, argp->taglen);
1840 READ_BUF(8);
1841 argp->minorversion = be32_to_cpup(p++);
1842 argp->opcnt = be32_to_cpup(p++);
1843 max_reply += 4 + (XDR_QUADLEN(argp->taglen) << 2);
1844
1845 if (argp->taglen > NFSD4_MAX_TAGLEN)
1846 goto xdr_error;
1847 if (argp->opcnt > 100)
1848 goto xdr_error;
1849
1850 if (argp->opcnt > ARRAY_SIZE(argp->iops)) {
1851 argp->ops = kzalloc(argp->opcnt * sizeof(*argp->ops), GFP_KERNEL);
1852 if (!argp->ops) {
1853 argp->ops = argp->iops;
1854 dprintk("nfsd: couldn't allocate room for COMPOUND\n");
1855 goto xdr_error;
1856 }
1857 }
1858
1859 if (argp->minorversion > NFSD_SUPPORTED_MINOR_VERSION)
1860 argp->opcnt = 0;
1861
1862 for (i = 0; i < argp->opcnt; i++) {
1863 op = &argp->ops[i];
1864 op->replay = NULL;
1865
1866 READ_BUF(4);
1867 op->opnum = be32_to_cpup(p++);
1868
1869 if (nfsd4_opnum_in_range(argp, op))
1870 op->status = nfsd4_dec_ops[op->opnum](argp, &op->u);
1871 else {
1872 op->opnum = OP_ILLEGAL;
1873 op->status = nfserr_op_illegal;
1874 }
1875 /*
1876 * We'll try to cache the result in the DRC if any one
1877 * op in the compound wants to be cached:
1878 */
1879 cachethis |= nfsd4_cache_this_op(op);
1880
1881 if (op->opnum == OP_READ) {
1882 readcount++;
1883 readbytes += nfsd4_max_reply(argp->rqstp, op);
1884 } else
1885 max_reply += nfsd4_max_reply(argp->rqstp, op);
1886 /*
1887 * OP_LOCK may return a conflicting lock. (Special case
1888 * because it will just skip encoding this if it runs
1889 * out of xdr buffer space, and it is the only operation
1890 * that behaves this way.)
1891 */
1892 if (op->opnum == OP_LOCK)
1893 max_reply += NFS4_OPAQUE_LIMIT;
1894
1895 if (op->status) {
1896 argp->opcnt = i+1;
1897 break;
1898 }
1899 }
1900 /* Sessions make the DRC unnecessary: */
1901 if (argp->minorversion)
1902 cachethis = false;
1903 svc_reserve(argp->rqstp, max_reply + readbytes);
1904 argp->rqstp->rq_cachetype = cachethis ? RC_REPLBUFF : RC_NOCACHE;
1905
1906 if (readcount > 1 || max_reply > PAGE_SIZE - auth_slack)
1907 clear_bit(RQ_SPLICE_OK, &argp->rqstp->rq_flags);
1908
1909 DECODE_TAIL;
1910 }
1911
1912 static __be32 *encode_change(__be32 *p, struct kstat *stat, struct inode *inode)
1913 {
1914 if (IS_I_VERSION(inode)) {
1915 p = xdr_encode_hyper(p, inode->i_version);
1916 } else {
1917 *p++ = cpu_to_be32(stat->ctime.tv_sec);
1918 *p++ = cpu_to_be32(stat->ctime.tv_nsec);
1919 }
1920 return p;
1921 }
1922
1923 static __be32 *encode_cinfo(__be32 *p, struct nfsd4_change_info *c)
1924 {
1925 *p++ = cpu_to_be32(c->atomic);
1926 if (c->change_supported) {
1927 p = xdr_encode_hyper(p, c->before_change);
1928 p = xdr_encode_hyper(p, c->after_change);
1929 } else {
1930 *p++ = cpu_to_be32(c->before_ctime_sec);
1931 *p++ = cpu_to_be32(c->before_ctime_nsec);
1932 *p++ = cpu_to_be32(c->after_ctime_sec);
1933 *p++ = cpu_to_be32(c->after_ctime_nsec);
1934 }
1935 return p;
1936 }
1937
1938 /* Encode as an array of strings the string given with components
1939 * separated @sep, escaped with esc_enter and esc_exit.
1940 */
1941 static __be32 nfsd4_encode_components_esc(struct xdr_stream *xdr, char sep,
1942 char *components, char esc_enter,
1943 char esc_exit)
1944 {
1945 __be32 *p;
1946 __be32 pathlen;
1947 int pathlen_offset;
1948 int strlen, count=0;
1949 char *str, *end, *next;
1950
1951 dprintk("nfsd4_encode_components(%s)\n", components);
1952
1953 pathlen_offset = xdr->buf->len;
1954 p = xdr_reserve_space(xdr, 4);
1955 if (!p)
1956 return nfserr_resource;
1957 p++; /* We will fill this in with @count later */
1958
1959 end = str = components;
1960 while (*end) {
1961 bool found_esc = false;
1962
1963 /* try to parse as esc_start, ..., esc_end, sep */
1964 if (*str == esc_enter) {
1965 for (; *end && (*end != esc_exit); end++)
1966 /* find esc_exit or end of string */;
1967 next = end + 1;
1968 if (*end && (!*next || *next == sep)) {
1969 str++;
1970 found_esc = true;
1971 }
1972 }
1973
1974 if (!found_esc)
1975 for (; *end && (*end != sep); end++)
1976 /* find sep or end of string */;
1977
1978 strlen = end - str;
1979 if (strlen) {
1980 p = xdr_reserve_space(xdr, strlen + 4);
1981 if (!p)
1982 return nfserr_resource;
1983 p = xdr_encode_opaque(p, str, strlen);
1984 count++;
1985 }
1986 else
1987 end++;
1988 if (found_esc)
1989 end = next;
1990
1991 str = end;
1992 }
1993 pathlen = htonl(count);
1994 write_bytes_to_xdr_buf(xdr->buf, pathlen_offset, &pathlen, 4);
1995 return 0;
1996 }
1997
1998 /* Encode as an array of strings the string given with components
1999 * separated @sep.
2000 */
2001 static __be32 nfsd4_encode_components(struct xdr_stream *xdr, char sep,
2002 char *components)
2003 {
2004 return nfsd4_encode_components_esc(xdr, sep, components, 0, 0);
2005 }
2006
2007 /*
2008 * encode a location element of a fs_locations structure
2009 */
2010 static __be32 nfsd4_encode_fs_location4(struct xdr_stream *xdr,
2011 struct nfsd4_fs_location *location)
2012 {
2013 __be32 status;
2014
2015 status = nfsd4_encode_components_esc(xdr, ':', location->hosts,
2016 '[', ']');
2017 if (status)
2018 return status;
2019 status = nfsd4_encode_components(xdr, '/', location->path);
2020 if (status)
2021 return status;
2022 return 0;
2023 }
2024
2025 /*
2026 * Encode a path in RFC3530 'pathname4' format
2027 */
2028 static __be32 nfsd4_encode_path(struct xdr_stream *xdr,
2029 const struct path *root,
2030 const struct path *path)
2031 {
2032 struct path cur = *path;
2033 __be32 *p;
2034 struct dentry **components = NULL;
2035 unsigned int ncomponents = 0;
2036 __be32 err = nfserr_jukebox;
2037
2038 dprintk("nfsd4_encode_components(");
2039
2040 path_get(&cur);
2041 /* First walk the path up to the nfsd root, and store the
2042 * dentries/path components in an array.
2043 */
2044 for (;;) {
2045 if (path_equal(&cur, root))
2046 break;
2047 if (cur.dentry == cur.mnt->mnt_root) {
2048 if (follow_up(&cur))
2049 continue;
2050 goto out_free;
2051 }
2052 if ((ncomponents & 15) == 0) {
2053 struct dentry **new;
2054 new = krealloc(components,
2055 sizeof(*new) * (ncomponents + 16),
2056 GFP_KERNEL);
2057 if (!new)
2058 goto out_free;
2059 components = new;
2060 }
2061 components[ncomponents++] = cur.dentry;
2062 cur.dentry = dget_parent(cur.dentry);
2063 }
2064 err = nfserr_resource;
2065 p = xdr_reserve_space(xdr, 4);
2066 if (!p)
2067 goto out_free;
2068 *p++ = cpu_to_be32(ncomponents);
2069
2070 while (ncomponents) {
2071 struct dentry *dentry = components[ncomponents - 1];
2072 unsigned int len;
2073
2074 spin_lock(&dentry->d_lock);
2075 len = dentry->d_name.len;
2076 p = xdr_reserve_space(xdr, len + 4);
2077 if (!p) {
2078 spin_unlock(&dentry->d_lock);
2079 goto out_free;
2080 }
2081 p = xdr_encode_opaque(p, dentry->d_name.name, len);
2082 dprintk("/%pd", dentry);
2083 spin_unlock(&dentry->d_lock);
2084 dput(dentry);
2085 ncomponents--;
2086 }
2087
2088 err = 0;
2089 out_free:
2090 dprintk(")\n");
2091 while (ncomponents)
2092 dput(components[--ncomponents]);
2093 kfree(components);
2094 path_put(&cur);
2095 return err;
2096 }
2097
2098 static __be32 nfsd4_encode_fsloc_fsroot(struct xdr_stream *xdr,
2099 struct svc_rqst *rqstp, const struct path *path)
2100 {
2101 struct svc_export *exp_ps;
2102 __be32 res;
2103
2104 exp_ps = rqst_find_fsidzero_export(rqstp);
2105 if (IS_ERR(exp_ps))
2106 return nfserrno(PTR_ERR(exp_ps));
2107 res = nfsd4_encode_path(xdr, &exp_ps->ex_path, path);
2108 exp_put(exp_ps);
2109 return res;
2110 }
2111
2112 /*
2113 * encode a fs_locations structure
2114 */
2115 static __be32 nfsd4_encode_fs_locations(struct xdr_stream *xdr,
2116 struct svc_rqst *rqstp, struct svc_export *exp)
2117 {
2118 __be32 status;
2119 int i;
2120 __be32 *p;
2121 struct nfsd4_fs_locations *fslocs = &exp->ex_fslocs;
2122
2123 status = nfsd4_encode_fsloc_fsroot(xdr, rqstp, &exp->ex_path);
2124 if (status)
2125 return status;
2126 p = xdr_reserve_space(xdr, 4);
2127 if (!p)
2128 return nfserr_resource;
2129 *p++ = cpu_to_be32(fslocs->locations_count);
2130 for (i=0; i<fslocs->locations_count; i++) {
2131 status = nfsd4_encode_fs_location4(xdr, &fslocs->locations[i]);
2132 if (status)
2133 return status;
2134 }
2135 return 0;
2136 }
2137
2138 static u32 nfs4_file_type(umode_t mode)
2139 {
2140 switch (mode & S_IFMT) {
2141 case S_IFIFO: return NF4FIFO;
2142 case S_IFCHR: return NF4CHR;
2143 case S_IFDIR: return NF4DIR;
2144 case S_IFBLK: return NF4BLK;
2145 case S_IFLNK: return NF4LNK;
2146 case S_IFREG: return NF4REG;
2147 case S_IFSOCK: return NF4SOCK;
2148 default: return NF4BAD;
2149 };
2150 }
2151
2152 static inline __be32
2153 nfsd4_encode_aclname(struct xdr_stream *xdr, struct svc_rqst *rqstp,
2154 struct nfs4_ace *ace)
2155 {
2156 if (ace->whotype != NFS4_ACL_WHO_NAMED)
2157 return nfs4_acl_write_who(xdr, ace->whotype);
2158 else if (ace->flag & NFS4_ACE_IDENTIFIER_GROUP)
2159 return nfsd4_encode_group(xdr, rqstp, ace->who_gid);
2160 else
2161 return nfsd4_encode_user(xdr, rqstp, ace->who_uid);
2162 }
2163
2164 static inline __be32
2165 nfsd4_encode_layout_types(struct xdr_stream *xdr, u32 layout_types)
2166 {
2167 __be32 *p;
2168 unsigned long i = hweight_long(layout_types);
2169
2170 p = xdr_reserve_space(xdr, 4 + 4 * i);
2171 if (!p)
2172 return nfserr_resource;
2173
2174 *p++ = cpu_to_be32(i);
2175
2176 for (i = LAYOUT_NFSV4_1_FILES; i < LAYOUT_TYPE_MAX; ++i)
2177 if (layout_types & (1 << i))
2178 *p++ = cpu_to_be32(i);
2179
2180 return 0;
2181 }
2182
2183 #define WORD0_ABSENT_FS_ATTRS (FATTR4_WORD0_FS_LOCATIONS | FATTR4_WORD0_FSID | \
2184 FATTR4_WORD0_RDATTR_ERROR)
2185 #define WORD1_ABSENT_FS_ATTRS FATTR4_WORD1_MOUNTED_ON_FILEID
2186 #define WORD2_ABSENT_FS_ATTRS 0
2187
2188 #ifdef CONFIG_NFSD_V4_SECURITY_LABEL
2189 static inline __be32
2190 nfsd4_encode_security_label(struct xdr_stream *xdr, struct svc_rqst *rqstp,
2191 void *context, int len)
2192 {
2193 __be32 *p;
2194
2195 p = xdr_reserve_space(xdr, len + 4 + 4 + 4);
2196 if (!p)
2197 return nfserr_resource;
2198
2199 /*
2200 * For now we use a 0 here to indicate the null translation; in
2201 * the future we may place a call to translation code here.
2202 */
2203 *p++ = cpu_to_be32(0); /* lfs */
2204 *p++ = cpu_to_be32(0); /* pi */
2205 p = xdr_encode_opaque(p, context, len);
2206 return 0;
2207 }
2208 #else
2209 static inline __be32
2210 nfsd4_encode_security_label(struct xdr_stream *xdr, struct svc_rqst *rqstp,
2211 void *context, int len)
2212 { return 0; }
2213 #endif
2214
2215 static __be32 fattr_handle_absent_fs(u32 *bmval0, u32 *bmval1, u32 *bmval2, u32 *rdattr_err)
2216 {
2217 /* As per referral draft: */
2218 if (*bmval0 & ~WORD0_ABSENT_FS_ATTRS ||
2219 *bmval1 & ~WORD1_ABSENT_FS_ATTRS) {
2220 if (*bmval0 & FATTR4_WORD0_RDATTR_ERROR ||
2221 *bmval0 & FATTR4_WORD0_FS_LOCATIONS)
2222 *rdattr_err = NFSERR_MOVED;
2223 else
2224 return nfserr_moved;
2225 }
2226 *bmval0 &= WORD0_ABSENT_FS_ATTRS;
2227 *bmval1 &= WORD1_ABSENT_FS_ATTRS;
2228 *bmval2 &= WORD2_ABSENT_FS_ATTRS;
2229 return 0;
2230 }
2231
2232
2233 static int get_parent_attributes(struct svc_export *exp, struct kstat *stat)
2234 {
2235 struct path path = exp->ex_path;
2236 int err;
2237
2238 path_get(&path);
2239 while (follow_up(&path)) {
2240 if (path.dentry != path.mnt->mnt_root)
2241 break;
2242 }
2243 err = vfs_getattr(&path, stat);
2244 path_put(&path);
2245 return err;
2246 }
2247
2248 static __be32
2249 nfsd4_encode_bitmap(struct xdr_stream *xdr, u32 bmval0, u32 bmval1, u32 bmval2)
2250 {
2251 __be32 *p;
2252
2253 if (bmval2) {
2254 p = xdr_reserve_space(xdr, 16);
2255 if (!p)
2256 goto out_resource;
2257 *p++ = cpu_to_be32(3);
2258 *p++ = cpu_to_be32(bmval0);
2259 *p++ = cpu_to_be32(bmval1);
2260 *p++ = cpu_to_be32(bmval2);
2261 } else if (bmval1) {
2262 p = xdr_reserve_space(xdr, 12);
2263 if (!p)
2264 goto out_resource;
2265 *p++ = cpu_to_be32(2);
2266 *p++ = cpu_to_be32(bmval0);
2267 *p++ = cpu_to_be32(bmval1);
2268 } else {
2269 p = xdr_reserve_space(xdr, 8);
2270 if (!p)
2271 goto out_resource;
2272 *p++ = cpu_to_be32(1);
2273 *p++ = cpu_to_be32(bmval0);
2274 }
2275
2276 return 0;
2277 out_resource:
2278 return nfserr_resource;
2279 }
2280
2281 /*
2282 * Note: @fhp can be NULL; in this case, we might have to compose the filehandle
2283 * ourselves.
2284 */
2285 static __be32
2286 nfsd4_encode_fattr(struct xdr_stream *xdr, struct svc_fh *fhp,
2287 struct svc_export *exp,
2288 struct dentry *dentry, u32 *bmval,
2289 struct svc_rqst *rqstp, int ignore_crossmnt)
2290 {
2291 u32 bmval0 = bmval[0];
2292 u32 bmval1 = bmval[1];
2293 u32 bmval2 = bmval[2];
2294 struct kstat stat;
2295 struct svc_fh *tempfh = NULL;
2296 struct kstatfs statfs;
2297 __be32 *p;
2298 int starting_len = xdr->buf->len;
2299 int attrlen_offset;
2300 __be32 attrlen;
2301 u32 dummy;
2302 u64 dummy64;
2303 u32 rdattr_err = 0;
2304 __be32 status;
2305 int err;
2306 struct nfs4_acl *acl = NULL;
2307 void *context = NULL;
2308 int contextlen;
2309 bool contextsupport = false;
2310 struct nfsd4_compoundres *resp = rqstp->rq_resp;
2311 u32 minorversion = resp->cstate.minorversion;
2312 struct path path = {
2313 .mnt = exp->ex_path.mnt,
2314 .dentry = dentry,
2315 };
2316 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
2317
2318 BUG_ON(bmval1 & NFSD_WRITEONLY_ATTRS_WORD1);
2319 BUG_ON(bmval0 & ~nfsd_suppattrs0(minorversion));
2320 BUG_ON(bmval1 & ~nfsd_suppattrs1(minorversion));
2321 BUG_ON(bmval2 & ~nfsd_suppattrs2(minorversion));
2322
2323 if (exp->ex_fslocs.migrated) {
2324 status = fattr_handle_absent_fs(&bmval0, &bmval1, &bmval2, &rdattr_err);
2325 if (status)
2326 goto out;
2327 }
2328
2329 err = vfs_getattr(&path, &stat);
2330 if (err)
2331 goto out_nfserr;
2332 if ((bmval0 & (FATTR4_WORD0_FILES_AVAIL | FATTR4_WORD0_FILES_FREE |
2333 FATTR4_WORD0_FILES_TOTAL | FATTR4_WORD0_MAXNAME)) ||
2334 (bmval1 & (FATTR4_WORD1_SPACE_AVAIL | FATTR4_WORD1_SPACE_FREE |
2335 FATTR4_WORD1_SPACE_TOTAL))) {
2336 err = vfs_statfs(&path, &statfs);
2337 if (err)
2338 goto out_nfserr;
2339 }
2340 if ((bmval0 & (FATTR4_WORD0_FILEHANDLE | FATTR4_WORD0_FSID)) && !fhp) {
2341 tempfh = kmalloc(sizeof(struct svc_fh), GFP_KERNEL);
2342 status = nfserr_jukebox;
2343 if (!tempfh)
2344 goto out;
2345 fh_init(tempfh, NFS4_FHSIZE);
2346 status = fh_compose(tempfh, exp, dentry, NULL);
2347 if (status)
2348 goto out;
2349 fhp = tempfh;
2350 }
2351 if (bmval0 & FATTR4_WORD0_ACL) {
2352 err = nfsd4_get_nfs4_acl(rqstp, dentry, &acl);
2353 if (err == -EOPNOTSUPP)
2354 bmval0 &= ~FATTR4_WORD0_ACL;
2355 else if (err == -EINVAL) {
2356 status = nfserr_attrnotsupp;
2357 goto out;
2358 } else if (err != 0)
2359 goto out_nfserr;
2360 }
2361
2362 #ifdef CONFIG_NFSD_V4_SECURITY_LABEL
2363 if ((bmval2 & FATTR4_WORD2_SECURITY_LABEL) ||
2364 bmval0 & FATTR4_WORD0_SUPPORTED_ATTRS) {
2365 err = security_inode_getsecctx(d_inode(dentry),
2366 &context, &contextlen);
2367 contextsupport = (err == 0);
2368 if (bmval2 & FATTR4_WORD2_SECURITY_LABEL) {
2369 if (err == -EOPNOTSUPP)
2370 bmval2 &= ~FATTR4_WORD2_SECURITY_LABEL;
2371 else if (err)
2372 goto out_nfserr;
2373 }
2374 }
2375 #endif /* CONFIG_NFSD_V4_SECURITY_LABEL */
2376
2377 status = nfsd4_encode_bitmap(xdr, bmval0, bmval1, bmval2);
2378 if (status)
2379 goto out;
2380
2381 attrlen_offset = xdr->buf->len;
2382 p = xdr_reserve_space(xdr, 4);
2383 if (!p)
2384 goto out_resource;
2385 p++; /* to be backfilled later */
2386
2387 if (bmval0 & FATTR4_WORD0_SUPPORTED_ATTRS) {
2388 u32 word0 = nfsd_suppattrs0(minorversion);
2389 u32 word1 = nfsd_suppattrs1(minorversion);
2390 u32 word2 = nfsd_suppattrs2(minorversion);
2391
2392 if (!IS_POSIXACL(dentry->d_inode))
2393 word0 &= ~FATTR4_WORD0_ACL;
2394 if (!contextsupport)
2395 word2 &= ~FATTR4_WORD2_SECURITY_LABEL;
2396 if (!word2) {
2397 p = xdr_reserve_space(xdr, 12);
2398 if (!p)
2399 goto out_resource;
2400 *p++ = cpu_to_be32(2);
2401 *p++ = cpu_to_be32(word0);
2402 *p++ = cpu_to_be32(word1);
2403 } else {
2404 p = xdr_reserve_space(xdr, 16);
2405 if (!p)
2406 goto out_resource;
2407 *p++ = cpu_to_be32(3);
2408 *p++ = cpu_to_be32(word0);
2409 *p++ = cpu_to_be32(word1);
2410 *p++ = cpu_to_be32(word2);
2411 }
2412 }
2413 if (bmval0 & FATTR4_WORD0_TYPE) {
2414 p = xdr_reserve_space(xdr, 4);
2415 if (!p)
2416 goto out_resource;
2417 dummy = nfs4_file_type(stat.mode);
2418 if (dummy == NF4BAD) {
2419 status = nfserr_serverfault;
2420 goto out;
2421 }
2422 *p++ = cpu_to_be32(dummy);
2423 }
2424 if (bmval0 & FATTR4_WORD0_FH_EXPIRE_TYPE) {
2425 p = xdr_reserve_space(xdr, 4);
2426 if (!p)
2427 goto out_resource;
2428 if (exp->ex_flags & NFSEXP_NOSUBTREECHECK)
2429 *p++ = cpu_to_be32(NFS4_FH_PERSISTENT);
2430 else
2431 *p++ = cpu_to_be32(NFS4_FH_PERSISTENT|
2432 NFS4_FH_VOL_RENAME);
2433 }
2434 if (bmval0 & FATTR4_WORD0_CHANGE) {
2435 p = xdr_reserve_space(xdr, 8);
2436 if (!p)
2437 goto out_resource;
2438 p = encode_change(p, &stat, d_inode(dentry));
2439 }
2440 if (bmval0 & FATTR4_WORD0_SIZE) {
2441 p = xdr_reserve_space(xdr, 8);
2442 if (!p)
2443 goto out_resource;
2444 p = xdr_encode_hyper(p, stat.size);
2445 }
2446 if (bmval0 & FATTR4_WORD0_LINK_SUPPORT) {
2447 p = xdr_reserve_space(xdr, 4);
2448 if (!p)
2449 goto out_resource;
2450 *p++ = cpu_to_be32(1);
2451 }
2452 if (bmval0 & FATTR4_WORD0_SYMLINK_SUPPORT) {
2453 p = xdr_reserve_space(xdr, 4);
2454 if (!p)
2455 goto out_resource;
2456 *p++ = cpu_to_be32(1);
2457 }
2458 if (bmval0 & FATTR4_WORD0_NAMED_ATTR) {
2459 p = xdr_reserve_space(xdr, 4);
2460 if (!p)
2461 goto out_resource;
2462 *p++ = cpu_to_be32(0);
2463 }
2464 if (bmval0 & FATTR4_WORD0_FSID) {
2465 p = xdr_reserve_space(xdr, 16);
2466 if (!p)
2467 goto out_resource;
2468 if (exp->ex_fslocs.migrated) {
2469 p = xdr_encode_hyper(p, NFS4_REFERRAL_FSID_MAJOR);
2470 p = xdr_encode_hyper(p, NFS4_REFERRAL_FSID_MINOR);
2471 } else switch(fsid_source(fhp)) {
2472 case FSIDSOURCE_FSID:
2473 p = xdr_encode_hyper(p, (u64)exp->ex_fsid);
2474 p = xdr_encode_hyper(p, (u64)0);
2475 break;
2476 case FSIDSOURCE_DEV:
2477 *p++ = cpu_to_be32(0);
2478 *p++ = cpu_to_be32(MAJOR(stat.dev));
2479 *p++ = cpu_to_be32(0);
2480 *p++ = cpu_to_be32(MINOR(stat.dev));
2481 break;
2482 case FSIDSOURCE_UUID:
2483 p = xdr_encode_opaque_fixed(p, exp->ex_uuid,
2484 EX_UUID_LEN);
2485 break;
2486 }
2487 }
2488 if (bmval0 & FATTR4_WORD0_UNIQUE_HANDLES) {
2489 p = xdr_reserve_space(xdr, 4);
2490 if (!p)
2491 goto out_resource;
2492 *p++ = cpu_to_be32(0);
2493 }
2494 if (bmval0 & FATTR4_WORD0_LEASE_TIME) {
2495 p = xdr_reserve_space(xdr, 4);
2496 if (!p)
2497 goto out_resource;
2498 *p++ = cpu_to_be32(nn->nfsd4_lease);
2499 }
2500 if (bmval0 & FATTR4_WORD0_RDATTR_ERROR) {
2501 p = xdr_reserve_space(xdr, 4);
2502 if (!p)
2503 goto out_resource;
2504 *p++ = cpu_to_be32(rdattr_err);
2505 }
2506 if (bmval0 & FATTR4_WORD0_ACL) {
2507 struct nfs4_ace *ace;
2508
2509 if (acl == NULL) {
2510 p = xdr_reserve_space(xdr, 4);
2511 if (!p)
2512 goto out_resource;
2513
2514 *p++ = cpu_to_be32(0);
2515 goto out_acl;
2516 }
2517 p = xdr_reserve_space(xdr, 4);
2518 if (!p)
2519 goto out_resource;
2520 *p++ = cpu_to_be32(acl->naces);
2521
2522 for (ace = acl->aces; ace < acl->aces + acl->naces; ace++) {
2523 p = xdr_reserve_space(xdr, 4*3);
2524 if (!p)
2525 goto out_resource;
2526 *p++ = cpu_to_be32(ace->type);
2527 *p++ = cpu_to_be32(ace->flag);
2528 *p++ = cpu_to_be32(ace->access_mask &
2529 NFS4_ACE_MASK_ALL);
2530 status = nfsd4_encode_aclname(xdr, rqstp, ace);
2531 if (status)
2532 goto out;
2533 }
2534 }
2535 out_acl:
2536 if (bmval0 & FATTR4_WORD0_ACLSUPPORT) {
2537 p = xdr_reserve_space(xdr, 4);
2538 if (!p)
2539 goto out_resource;
2540 *p++ = cpu_to_be32(IS_POSIXACL(dentry->d_inode) ?
2541 ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL : 0);
2542 }
2543 if (bmval0 & FATTR4_WORD0_CANSETTIME) {
2544 p = xdr_reserve_space(xdr, 4);
2545 if (!p)
2546 goto out_resource;
2547 *p++ = cpu_to_be32(1);
2548 }
2549 if (bmval0 & FATTR4_WORD0_CASE_INSENSITIVE) {
2550 p = xdr_reserve_space(xdr, 4);
2551 if (!p)
2552 goto out_resource;
2553 *p++ = cpu_to_be32(0);
2554 }
2555 if (bmval0 & FATTR4_WORD0_CASE_PRESERVING) {
2556 p = xdr_reserve_space(xdr, 4);
2557 if (!p)
2558 goto out_resource;
2559 *p++ = cpu_to_be32(1);
2560 }
2561 if (bmval0 & FATTR4_WORD0_CHOWN_RESTRICTED) {
2562 p = xdr_reserve_space(xdr, 4);
2563 if (!p)
2564 goto out_resource;
2565 *p++ = cpu_to_be32(1);
2566 }
2567 if (bmval0 & FATTR4_WORD0_FILEHANDLE) {
2568 p = xdr_reserve_space(xdr, fhp->fh_handle.fh_size + 4);
2569 if (!p)
2570 goto out_resource;
2571 p = xdr_encode_opaque(p, &fhp->fh_handle.fh_base,
2572 fhp->fh_handle.fh_size);
2573 }
2574 if (bmval0 & FATTR4_WORD0_FILEID) {
2575 p = xdr_reserve_space(xdr, 8);
2576 if (!p)
2577 goto out_resource;
2578 p = xdr_encode_hyper(p, stat.ino);
2579 }
2580 if (bmval0 & FATTR4_WORD0_FILES_AVAIL) {
2581 p = xdr_reserve_space(xdr, 8);
2582 if (!p)
2583 goto out_resource;
2584 p = xdr_encode_hyper(p, (u64) statfs.f_ffree);
2585 }
2586 if (bmval0 & FATTR4_WORD0_FILES_FREE) {
2587 p = xdr_reserve_space(xdr, 8);
2588 if (!p)
2589 goto out_resource;
2590 p = xdr_encode_hyper(p, (u64) statfs.f_ffree);
2591 }
2592 if (bmval0 & FATTR4_WORD0_FILES_TOTAL) {
2593 p = xdr_reserve_space(xdr, 8);
2594 if (!p)
2595 goto out_resource;
2596 p = xdr_encode_hyper(p, (u64) statfs.f_files);
2597 }
2598 if (bmval0 & FATTR4_WORD0_FS_LOCATIONS) {
2599 status = nfsd4_encode_fs_locations(xdr, rqstp, exp);
2600 if (status)
2601 goto out;
2602 }
2603 if (bmval0 & FATTR4_WORD0_HOMOGENEOUS) {
2604 p = xdr_reserve_space(xdr, 4);
2605 if (!p)
2606 goto out_resource;
2607 *p++ = cpu_to_be32(1);
2608 }
2609 if (bmval0 & FATTR4_WORD0_MAXFILESIZE) {
2610 p = xdr_reserve_space(xdr, 8);
2611 if (!p)
2612 goto out_resource;
2613 p = xdr_encode_hyper(p, exp->ex_path.mnt->mnt_sb->s_maxbytes);
2614 }
2615 if (bmval0 & FATTR4_WORD0_MAXLINK) {
2616 p = xdr_reserve_space(xdr, 4);
2617 if (!p)
2618 goto out_resource;
2619 *p++ = cpu_to_be32(255);
2620 }
2621 if (bmval0 & FATTR4_WORD0_MAXNAME) {
2622 p = xdr_reserve_space(xdr, 4);
2623 if (!p)
2624 goto out_resource;
2625 *p++ = cpu_to_be32(statfs.f_namelen);
2626 }
2627 if (bmval0 & FATTR4_WORD0_MAXREAD) {
2628 p = xdr_reserve_space(xdr, 8);
2629 if (!p)
2630 goto out_resource;
2631 p = xdr_encode_hyper(p, (u64) svc_max_payload(rqstp));
2632 }
2633 if (bmval0 & FATTR4_WORD0_MAXWRITE) {
2634 p = xdr_reserve_space(xdr, 8);
2635 if (!p)
2636 goto out_resource;
2637 p = xdr_encode_hyper(p, (u64) svc_max_payload(rqstp));
2638 }
2639 if (bmval1 & FATTR4_WORD1_MODE) {
2640 p = xdr_reserve_space(xdr, 4);
2641 if (!p)
2642 goto out_resource;
2643 *p++ = cpu_to_be32(stat.mode & S_IALLUGO);
2644 }
2645 if (bmval1 & FATTR4_WORD1_NO_TRUNC) {
2646 p = xdr_reserve_space(xdr, 4);
2647 if (!p)
2648 goto out_resource;
2649 *p++ = cpu_to_be32(1);
2650 }
2651 if (bmval1 & FATTR4_WORD1_NUMLINKS) {
2652 p = xdr_reserve_space(xdr, 4);
2653 if (!p)
2654 goto out_resource;
2655 *p++ = cpu_to_be32(stat.nlink);
2656 }
2657 if (bmval1 & FATTR4_WORD1_OWNER) {
2658 status = nfsd4_encode_user(xdr, rqstp, stat.uid);
2659 if (status)
2660 goto out;
2661 }
2662 if (bmval1 & FATTR4_WORD1_OWNER_GROUP) {
2663 status = nfsd4_encode_group(xdr, rqstp, stat.gid);
2664 if (status)
2665 goto out;
2666 }
2667 if (bmval1 & FATTR4_WORD1_RAWDEV) {
2668 p = xdr_reserve_space(xdr, 8);
2669 if (!p)
2670 goto out_resource;
2671 *p++ = cpu_to_be32((u32) MAJOR(stat.rdev));
2672 *p++ = cpu_to_be32((u32) MINOR(stat.rdev));
2673 }
2674 if (bmval1 & FATTR4_WORD1_SPACE_AVAIL) {
2675 p = xdr_reserve_space(xdr, 8);
2676 if (!p)
2677 goto out_resource;
2678 dummy64 = (u64)statfs.f_bavail * (u64)statfs.f_bsize;
2679 p = xdr_encode_hyper(p, dummy64);
2680 }
2681 if (bmval1 & FATTR4_WORD1_SPACE_FREE) {
2682 p = xdr_reserve_space(xdr, 8);
2683 if (!p)
2684 goto out_resource;
2685 dummy64 = (u64)statfs.f_bfree * (u64)statfs.f_bsize;
2686 p = xdr_encode_hyper(p, dummy64);
2687 }
2688 if (bmval1 & FATTR4_WORD1_SPACE_TOTAL) {
2689 p = xdr_reserve_space(xdr, 8);
2690 if (!p)
2691 goto out_resource;
2692 dummy64 = (u64)statfs.f_blocks * (u64)statfs.f_bsize;
2693 p = xdr_encode_hyper(p, dummy64);
2694 }
2695 if (bmval1 & FATTR4_WORD1_SPACE_USED) {
2696 p = xdr_reserve_space(xdr, 8);
2697 if (!p)
2698 goto out_resource;
2699 dummy64 = (u64)stat.blocks << 9;
2700 p = xdr_encode_hyper(p, dummy64);
2701 }
2702 if (bmval1 & FATTR4_WORD1_TIME_ACCESS) {
2703 p = xdr_reserve_space(xdr, 12);
2704 if (!p)
2705 goto out_resource;
2706 p = xdr_encode_hyper(p, (s64)stat.atime.tv_sec);
2707 *p++ = cpu_to_be32(stat.atime.tv_nsec);
2708 }
2709 if (bmval1 & FATTR4_WORD1_TIME_DELTA) {
2710 p = xdr_reserve_space(xdr, 12);
2711 if (!p)
2712 goto out_resource;
2713 *p++ = cpu_to_be32(0);
2714 *p++ = cpu_to_be32(1);
2715 *p++ = cpu_to_be32(0);
2716 }
2717 if (bmval1 & FATTR4_WORD1_TIME_METADATA) {
2718 p = xdr_reserve_space(xdr, 12);
2719 if (!p)
2720 goto out_resource;
2721 p = xdr_encode_hyper(p, (s64)stat.ctime.tv_sec);
2722 *p++ = cpu_to_be32(stat.ctime.tv_nsec);
2723 }
2724 if (bmval1 & FATTR4_WORD1_TIME_MODIFY) {
2725 p = xdr_reserve_space(xdr, 12);
2726 if (!p)
2727 goto out_resource;
2728 p = xdr_encode_hyper(p, (s64)stat.mtime.tv_sec);
2729 *p++ = cpu_to_be32(stat.mtime.tv_nsec);
2730 }
2731 if (bmval1 & FATTR4_WORD1_MOUNTED_ON_FILEID) {
2732 struct kstat parent_stat;
2733 u64 ino = stat.ino;
2734
2735 p = xdr_reserve_space(xdr, 8);
2736 if (!p)
2737 goto out_resource;
2738 /*
2739 * Get parent's attributes if not ignoring crossmount
2740 * and this is the root of a cross-mounted filesystem.
2741 */
2742 if (ignore_crossmnt == 0 &&
2743 dentry == exp->ex_path.mnt->mnt_root) {
2744 err = get_parent_attributes(exp, &parent_stat);
2745 if (err)
2746 goto out_nfserr;
2747 ino = parent_stat.ino;
2748 }
2749 p = xdr_encode_hyper(p, ino);
2750 }
2751 #ifdef CONFIG_NFSD_PNFS
2752 if (bmval1 & FATTR4_WORD1_FS_LAYOUT_TYPES) {
2753 status = nfsd4_encode_layout_types(xdr, exp->ex_layout_types);
2754 if (status)
2755 goto out;
2756 }
2757
2758 if (bmval2 & FATTR4_WORD2_LAYOUT_TYPES) {
2759 status = nfsd4_encode_layout_types(xdr, exp->ex_layout_types);
2760 if (status)
2761 goto out;
2762 }
2763
2764 if (bmval2 & FATTR4_WORD2_LAYOUT_BLKSIZE) {
2765 p = xdr_reserve_space(xdr, 4);
2766 if (!p)
2767 goto out_resource;
2768 *p++ = cpu_to_be32(stat.blksize);
2769 }
2770 #endif /* CONFIG_NFSD_PNFS */
2771 if (bmval2 & FATTR4_WORD2_SUPPATTR_EXCLCREAT) {
2772 status = nfsd4_encode_bitmap(xdr, NFSD_SUPPATTR_EXCLCREAT_WORD0,
2773 NFSD_SUPPATTR_EXCLCREAT_WORD1,
2774 NFSD_SUPPATTR_EXCLCREAT_WORD2);
2775 if (status)
2776 goto out;
2777 }
2778
2779 if (bmval2 & FATTR4_WORD2_SECURITY_LABEL) {
2780 status = nfsd4_encode_security_label(xdr, rqstp, context,
2781 contextlen);
2782 if (status)
2783 goto out;
2784 }
2785
2786 attrlen = htonl(xdr->buf->len - attrlen_offset - 4);
2787 write_bytes_to_xdr_buf(xdr->buf, attrlen_offset, &attrlen, 4);
2788 status = nfs_ok;
2789
2790 out:
2791 #ifdef CONFIG_NFSD_V4_SECURITY_LABEL
2792 if (context)
2793 security_release_secctx(context, contextlen);
2794 #endif /* CONFIG_NFSD_V4_SECURITY_LABEL */
2795 kfree(acl);
2796 if (tempfh) {
2797 fh_put(tempfh);
2798 kfree(tempfh);
2799 }
2800 if (status)
2801 xdr_truncate_encode(xdr, starting_len);
2802 return status;
2803 out_nfserr:
2804 status = nfserrno(err);
2805 goto out;
2806 out_resource:
2807 status = nfserr_resource;
2808 goto out;
2809 }
2810
2811 static void svcxdr_init_encode_from_buffer(struct xdr_stream *xdr,
2812 struct xdr_buf *buf, __be32 *p, int bytes)
2813 {
2814 xdr->scratch.iov_len = 0;
2815 memset(buf, 0, sizeof(struct xdr_buf));
2816 buf->head[0].iov_base = p;
2817 buf->head[0].iov_len = 0;
2818 buf->len = 0;
2819 xdr->buf = buf;
2820 xdr->iov = buf->head;
2821 xdr->p = p;
2822 xdr->end = (void *)p + bytes;
2823 buf->buflen = bytes;
2824 }
2825
2826 __be32 nfsd4_encode_fattr_to_buf(__be32 **p, int words,
2827 struct svc_fh *fhp, struct svc_export *exp,
2828 struct dentry *dentry, u32 *bmval,
2829 struct svc_rqst *rqstp, int ignore_crossmnt)
2830 {
2831 struct xdr_buf dummy;
2832 struct xdr_stream xdr;
2833 __be32 ret;
2834
2835 svcxdr_init_encode_from_buffer(&xdr, &dummy, *p, words << 2);
2836 ret = nfsd4_encode_fattr(&xdr, fhp, exp, dentry, bmval, rqstp,
2837 ignore_crossmnt);
2838 *p = xdr.p;
2839 return ret;
2840 }
2841
2842 static inline int attributes_need_mount(u32 *bmval)
2843 {
2844 if (bmval[0] & ~(FATTR4_WORD0_RDATTR_ERROR | FATTR4_WORD0_LEASE_TIME))
2845 return 1;
2846 if (bmval[1] & ~FATTR4_WORD1_MOUNTED_ON_FILEID)
2847 return 1;
2848 return 0;
2849 }
2850
2851 static __be32
2852 nfsd4_encode_dirent_fattr(struct xdr_stream *xdr, struct nfsd4_readdir *cd,
2853 const char *name, int namlen)
2854 {
2855 struct svc_export *exp = cd->rd_fhp->fh_export;
2856 struct dentry *dentry;
2857 __be32 nfserr;
2858 int ignore_crossmnt = 0;
2859
2860 dentry = lookup_one_len_unlocked(name, cd->rd_fhp->fh_dentry, namlen);
2861 if (IS_ERR(dentry))
2862 return nfserrno(PTR_ERR(dentry));
2863 if (d_really_is_negative(dentry)) {
2864 /*
2865 * we're not holding the i_mutex here, so there's
2866 * a window where this directory entry could have gone
2867 * away.
2868 */
2869 dput(dentry);
2870 return nfserr_noent;
2871 }
2872
2873 exp_get(exp);
2874 /*
2875 * In the case of a mountpoint, the client may be asking for
2876 * attributes that are only properties of the underlying filesystem
2877 * as opposed to the cross-mounted file system. In such a case,
2878 * we will not follow the cross mount and will fill the attribtutes
2879 * directly from the mountpoint dentry.
2880 */
2881 if (nfsd_mountpoint(dentry, exp)) {
2882 int err;
2883
2884 if (!(exp->ex_flags & NFSEXP_V4ROOT)
2885 && !attributes_need_mount(cd->rd_bmval)) {
2886 ignore_crossmnt = 1;
2887 goto out_encode;
2888 }
2889 /*
2890 * Why the heck aren't we just using nfsd_lookup??
2891 * Different "."/".." handling? Something else?
2892 * At least, add a comment here to explain....
2893 */
2894 err = nfsd_cross_mnt(cd->rd_rqstp, &dentry, &exp);
2895 if (err) {
2896 nfserr = nfserrno(err);
2897 goto out_put;
2898 }
2899 nfserr = check_nfsd_access(exp, cd->rd_rqstp);
2900 if (nfserr)
2901 goto out_put;
2902
2903 }
2904 out_encode:
2905 nfserr = nfsd4_encode_fattr(xdr, NULL, exp, dentry, cd->rd_bmval,
2906 cd->rd_rqstp, ignore_crossmnt);
2907 out_put:
2908 dput(dentry);
2909 exp_put(exp);
2910 return nfserr;
2911 }
2912
2913 static __be32 *
2914 nfsd4_encode_rdattr_error(struct xdr_stream *xdr, __be32 nfserr)
2915 {
2916 __be32 *p;
2917
2918 p = xdr_reserve_space(xdr, 20);
2919 if (!p)
2920 return NULL;
2921 *p++ = htonl(2);
2922 *p++ = htonl(FATTR4_WORD0_RDATTR_ERROR); /* bmval0 */
2923 *p++ = htonl(0); /* bmval1 */
2924
2925 *p++ = htonl(4); /* attribute length */
2926 *p++ = nfserr; /* no htonl */
2927 return p;
2928 }
2929
2930 static int
2931 nfsd4_encode_dirent(void *ccdv, const char *name, int namlen,
2932 loff_t offset, u64 ino, unsigned int d_type)
2933 {
2934 struct readdir_cd *ccd = ccdv;
2935 struct nfsd4_readdir *cd = container_of(ccd, struct nfsd4_readdir, common);
2936 struct xdr_stream *xdr = cd->xdr;
2937 int start_offset = xdr->buf->len;
2938 int cookie_offset;
2939 u32 name_and_cookie;
2940 int entry_bytes;
2941 __be32 nfserr = nfserr_toosmall;
2942 __be64 wire_offset;
2943 __be32 *p;
2944
2945 /* In nfsv4, "." and ".." never make it onto the wire.. */
2946 if (name && isdotent(name, namlen)) {
2947 cd->common.err = nfs_ok;
2948 return 0;
2949 }
2950
2951 if (cd->cookie_offset) {
2952 wire_offset = cpu_to_be64(offset);
2953 write_bytes_to_xdr_buf(xdr->buf, cd->cookie_offset,
2954 &wire_offset, 8);
2955 }
2956
2957 p = xdr_reserve_space(xdr, 4);
2958 if (!p)
2959 goto fail;
2960 *p++ = xdr_one; /* mark entry present */
2961 cookie_offset = xdr->buf->len;
2962 p = xdr_reserve_space(xdr, 3*4 + namlen);
2963 if (!p)
2964 goto fail;
2965 p = xdr_encode_hyper(p, NFS_OFFSET_MAX); /* offset of next entry */
2966 p = xdr_encode_array(p, name, namlen); /* name length & name */
2967
2968 nfserr = nfsd4_encode_dirent_fattr(xdr, cd, name, namlen);
2969 switch (nfserr) {
2970 case nfs_ok:
2971 break;
2972 case nfserr_resource:
2973 nfserr = nfserr_toosmall;
2974 goto fail;
2975 case nfserr_noent:
2976 xdr_truncate_encode(xdr, start_offset);
2977 goto skip_entry;
2978 default:
2979 /*
2980 * If the client requested the RDATTR_ERROR attribute,
2981 * we stuff the error code into this attribute
2982 * and continue. If this attribute was not requested,
2983 * then in accordance with the spec, we fail the
2984 * entire READDIR operation(!)
2985 */
2986 if (!(cd->rd_bmval[0] & FATTR4_WORD0_RDATTR_ERROR))
2987 goto fail;
2988 p = nfsd4_encode_rdattr_error(xdr, nfserr);
2989 if (p == NULL) {
2990 nfserr = nfserr_toosmall;
2991 goto fail;
2992 }
2993 }
2994 nfserr = nfserr_toosmall;
2995 entry_bytes = xdr->buf->len - start_offset;
2996 if (entry_bytes > cd->rd_maxcount)
2997 goto fail;
2998 cd->rd_maxcount -= entry_bytes;
2999 /*
3000 * RFC 3530 14.2.24 describes rd_dircount as only a "hint", so
3001 * let's always let through the first entry, at least:
3002 */
3003 if (!cd->rd_dircount)
3004 goto fail;
3005 name_and_cookie = 4 + 4 * XDR_QUADLEN(namlen) + 8;
3006 if (name_and_cookie > cd->rd_dircount && cd->cookie_offset)
3007 goto fail;
3008 cd->rd_dircount -= min(cd->rd_dircount, name_and_cookie);
3009
3010 cd->cookie_offset = cookie_offset;
3011 skip_entry:
3012 cd->common.err = nfs_ok;
3013 return 0;
3014 fail:
3015 xdr_truncate_encode(xdr, start_offset);
3016 cd->common.err = nfserr;
3017 return -EINVAL;
3018 }
3019
3020 static __be32
3021 nfsd4_encode_stateid(struct xdr_stream *xdr, stateid_t *sid)
3022 {
3023 __be32 *p;
3024
3025 p = xdr_reserve_space(xdr, sizeof(stateid_t));
3026 if (!p)
3027 return nfserr_resource;
3028 *p++ = cpu_to_be32(sid->si_generation);
3029 p = xdr_encode_opaque_fixed(p, &sid->si_opaque,
3030 sizeof(stateid_opaque_t));
3031 return 0;
3032 }
3033
3034 static __be32
3035 nfsd4_encode_access(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_access *access)
3036 {
3037 struct xdr_stream *xdr = &resp->xdr;
3038 __be32 *p;
3039
3040 if (!nfserr) {
3041 p = xdr_reserve_space(xdr, 8);
3042 if (!p)
3043 return nfserr_resource;
3044 *p++ = cpu_to_be32(access->ac_supported);
3045 *p++ = cpu_to_be32(access->ac_resp_access);
3046 }
3047 return nfserr;
3048 }
3049
3050 static __be32 nfsd4_encode_bind_conn_to_session(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_bind_conn_to_session *bcts)
3051 {
3052 struct xdr_stream *xdr = &resp->xdr;
3053 __be32 *p;
3054
3055 if (!nfserr) {
3056 p = xdr_reserve_space(xdr, NFS4_MAX_SESSIONID_LEN + 8);
3057 if (!p)
3058 return nfserr_resource;
3059 p = xdr_encode_opaque_fixed(p, bcts->sessionid.data,
3060 NFS4_MAX_SESSIONID_LEN);
3061 *p++ = cpu_to_be32(bcts->dir);
3062 /* Upshifting from TCP to RDMA is not supported */
3063 *p++ = cpu_to_be32(0);
3064 }
3065 return nfserr;
3066 }
3067
3068 static __be32
3069 nfsd4_encode_close(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_close *close)
3070 {
3071 struct xdr_stream *xdr = &resp->xdr;
3072
3073 if (!nfserr)
3074 nfserr = nfsd4_encode_stateid(xdr, &close->cl_stateid);
3075
3076 return nfserr;
3077 }
3078
3079
3080 static __be32
3081 nfsd4_encode_commit(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_commit *commit)
3082 {
3083 struct xdr_stream *xdr = &resp->xdr;
3084 __be32 *p;
3085
3086 if (!nfserr) {
3087 p = xdr_reserve_space(xdr, NFS4_VERIFIER_SIZE);
3088 if (!p)
3089 return nfserr_resource;
3090 p = xdr_encode_opaque_fixed(p, commit->co_verf.data,
3091 NFS4_VERIFIER_SIZE);
3092 }
3093 return nfserr;
3094 }
3095
3096 static __be32
3097 nfsd4_encode_create(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_create *create)
3098 {
3099 struct xdr_stream *xdr = &resp->xdr;
3100 __be32 *p;
3101
3102 if (!nfserr) {
3103 p = xdr_reserve_space(xdr, 20);
3104 if (!p)
3105 return nfserr_resource;
3106 encode_cinfo(p, &create->cr_cinfo);
3107 nfserr = nfsd4_encode_bitmap(xdr, create->cr_bmval[0],
3108 create->cr_bmval[1], create->cr_bmval[2]);
3109 }
3110 return nfserr;
3111 }
3112
3113 static __be32
3114 nfsd4_encode_getattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_getattr *getattr)
3115 {
3116 struct svc_fh *fhp = getattr->ga_fhp;
3117 struct xdr_stream *xdr = &resp->xdr;
3118
3119 if (nfserr)
3120 return nfserr;
3121
3122 nfserr = nfsd4_encode_fattr(xdr, fhp, fhp->fh_export, fhp->fh_dentry,
3123 getattr->ga_bmval,
3124 resp->rqstp, 0);
3125 return nfserr;
3126 }
3127
3128 static __be32
3129 nfsd4_encode_getfh(struct nfsd4_compoundres *resp, __be32 nfserr, struct svc_fh **fhpp)
3130 {
3131 struct xdr_stream *xdr = &resp->xdr;
3132 struct svc_fh *fhp = *fhpp;
3133 unsigned int len;
3134 __be32 *p;
3135
3136 if (!nfserr) {
3137 len = fhp->fh_handle.fh_size;
3138 p = xdr_reserve_space(xdr, len + 4);
3139 if (!p)
3140 return nfserr_resource;
3141 p = xdr_encode_opaque(p, &fhp->fh_handle.fh_base, len);
3142 }
3143 return nfserr;
3144 }
3145
3146 /*
3147 * Including all fields other than the name, a LOCK4denied structure requires
3148 * 8(clientid) + 4(namelen) + 8(offset) + 8(length) + 4(type) = 32 bytes.
3149 */
3150 static __be32
3151 nfsd4_encode_lock_denied(struct xdr_stream *xdr, struct nfsd4_lock_denied *ld)
3152 {
3153 struct xdr_netobj *conf = &ld->ld_owner;
3154 __be32 *p;
3155
3156 again:
3157 p = xdr_reserve_space(xdr, 32 + XDR_LEN(conf->len));
3158 if (!p) {
3159 /*
3160 * Don't fail to return the result just because we can't
3161 * return the conflicting open:
3162 */
3163 if (conf->len) {
3164 kfree(conf->data);
3165 conf->len = 0;
3166 conf->data = NULL;
3167 goto again;
3168 }
3169 return nfserr_resource;
3170 }
3171 p = xdr_encode_hyper(p, ld->ld_start);
3172 p = xdr_encode_hyper(p, ld->ld_length);
3173 *p++ = cpu_to_be32(ld->ld_type);
3174 if (conf->len) {
3175 p = xdr_encode_opaque_fixed(p, &ld->ld_clientid, 8);
3176 p = xdr_encode_opaque(p, conf->data, conf->len);
3177 kfree(conf->data);
3178 } else { /* non - nfsv4 lock in conflict, no clientid nor owner */
3179 p = xdr_encode_hyper(p, (u64)0); /* clientid */
3180 *p++ = cpu_to_be32(0); /* length of owner name */
3181 }
3182 return nfserr_denied;
3183 }
3184
3185 static __be32
3186 nfsd4_encode_lock(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lock *lock)
3187 {
3188 struct xdr_stream *xdr = &resp->xdr;
3189
3190 if (!nfserr)
3191 nfserr = nfsd4_encode_stateid(xdr, &lock->lk_resp_stateid);
3192 else if (nfserr == nfserr_denied)
3193 nfserr = nfsd4_encode_lock_denied(xdr, &lock->lk_denied);
3194
3195 return nfserr;
3196 }
3197
3198 static __be32
3199 nfsd4_encode_lockt(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lockt *lockt)
3200 {
3201 struct xdr_stream *xdr = &resp->xdr;
3202
3203 if (nfserr == nfserr_denied)
3204 nfsd4_encode_lock_denied(xdr, &lockt->lt_denied);
3205 return nfserr;
3206 }
3207
3208 static __be32
3209 nfsd4_encode_locku(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_locku *locku)
3210 {
3211 struct xdr_stream *xdr = &resp->xdr;
3212
3213 if (!nfserr)
3214 nfserr = nfsd4_encode_stateid(xdr, &locku->lu_stateid);
3215
3216 return nfserr;
3217 }
3218
3219
3220 static __be32
3221 nfsd4_encode_link(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_link *link)
3222 {
3223 struct xdr_stream *xdr = &resp->xdr;
3224 __be32 *p;
3225
3226 if (!nfserr) {
3227 p = xdr_reserve_space(xdr, 20);
3228 if (!p)
3229 return nfserr_resource;
3230 p = encode_cinfo(p, &link->li_cinfo);
3231 }
3232 return nfserr;
3233 }
3234
3235
3236 static __be32
3237 nfsd4_encode_open(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open *open)
3238 {
3239 struct xdr_stream *xdr = &resp->xdr;
3240 __be32 *p;
3241
3242 if (nfserr)
3243 goto out;
3244
3245 nfserr = nfsd4_encode_stateid(xdr, &open->op_stateid);
3246 if (nfserr)
3247 goto out;
3248 p = xdr_reserve_space(xdr, 24);
3249 if (!p)
3250 return nfserr_resource;
3251 p = encode_cinfo(p, &open->op_cinfo);
3252 *p++ = cpu_to_be32(open->op_rflags);
3253
3254 nfserr = nfsd4_encode_bitmap(xdr, open->op_bmval[0], open->op_bmval[1],
3255 open->op_bmval[2]);
3256 if (nfserr)
3257 goto out;
3258
3259 p = xdr_reserve_space(xdr, 4);
3260 if (!p)
3261 return nfserr_resource;
3262
3263 *p++ = cpu_to_be32(open->op_delegate_type);
3264 switch (open->op_delegate_type) {
3265 case NFS4_OPEN_DELEGATE_NONE:
3266 break;
3267 case NFS4_OPEN_DELEGATE_READ:
3268 nfserr = nfsd4_encode_stateid(xdr, &open->op_delegate_stateid);
3269 if (nfserr)
3270 return nfserr;
3271 p = xdr_reserve_space(xdr, 20);
3272 if (!p)
3273 return nfserr_resource;
3274 *p++ = cpu_to_be32(open->op_recall);
3275
3276 /*
3277 * TODO: ACE's in delegations
3278 */
3279 *p++ = cpu_to_be32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
3280 *p++ = cpu_to_be32(0);
3281 *p++ = cpu_to_be32(0);
3282 *p++ = cpu_to_be32(0); /* XXX: is NULL principal ok? */
3283 break;
3284 case NFS4_OPEN_DELEGATE_WRITE:
3285 nfserr = nfsd4_encode_stateid(xdr, &open->op_delegate_stateid);
3286 if (nfserr)
3287 return nfserr;
3288 p = xdr_reserve_space(xdr, 32);
3289 if (!p)
3290 return nfserr_resource;
3291 *p++ = cpu_to_be32(0);
3292
3293 /*
3294 * TODO: space_limit's in delegations
3295 */
3296 *p++ = cpu_to_be32(NFS4_LIMIT_SIZE);
3297 *p++ = cpu_to_be32(~(u32)0);
3298 *p++ = cpu_to_be32(~(u32)0);
3299
3300 /*
3301 * TODO: ACE's in delegations
3302 */
3303 *p++ = cpu_to_be32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
3304 *p++ = cpu_to_be32(0);
3305 *p++ = cpu_to_be32(0);
3306 *p++ = cpu_to_be32(0); /* XXX: is NULL principal ok? */
3307 break;
3308 case NFS4_OPEN_DELEGATE_NONE_EXT: /* 4.1 */
3309 switch (open->op_why_no_deleg) {
3310 case WND4_CONTENTION:
3311 case WND4_RESOURCE:
3312 p = xdr_reserve_space(xdr, 8);
3313 if (!p)
3314 return nfserr_resource;
3315 *p++ = cpu_to_be32(open->op_why_no_deleg);
3316 /* deleg signaling not supported yet: */
3317 *p++ = cpu_to_be32(0);
3318 break;
3319 default:
3320 p = xdr_reserve_space(xdr, 4);
3321 if (!p)
3322 return nfserr_resource;
3323 *p++ = cpu_to_be32(open->op_why_no_deleg);
3324 }
3325 break;
3326 default:
3327 BUG();
3328 }
3329 /* XXX save filehandle here */
3330 out:
3331 return nfserr;
3332 }
3333
3334 static __be32
3335 nfsd4_encode_open_confirm(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_confirm *oc)
3336 {
3337 struct xdr_stream *xdr = &resp->xdr;
3338
3339 if (!nfserr)
3340 nfserr = nfsd4_encode_stateid(xdr, &oc->oc_resp_stateid);
3341
3342 return nfserr;
3343 }
3344
3345 static __be32
3346 nfsd4_encode_open_downgrade(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_downgrade *od)
3347 {
3348 struct xdr_stream *xdr = &resp->xdr;
3349
3350 if (!nfserr)
3351 nfserr = nfsd4_encode_stateid(xdr, &od->od_stateid);
3352
3353 return nfserr;
3354 }
3355
3356 static __be32 nfsd4_encode_splice_read(
3357 struct nfsd4_compoundres *resp,
3358 struct nfsd4_read *read,
3359 struct file *file, unsigned long maxcount)
3360 {
3361 struct xdr_stream *xdr = &resp->xdr;
3362 struct xdr_buf *buf = xdr->buf;
3363 u32 eof;
3364 long len;
3365 int space_left;
3366 __be32 nfserr;
3367 __be32 *p = xdr->p - 2;
3368
3369 /* Make sure there will be room for padding if needed */
3370 if (xdr->end - xdr->p < 1)
3371 return nfserr_resource;
3372
3373 len = maxcount;
3374 nfserr = nfsd_splice_read(read->rd_rqstp, file,
3375 read->rd_offset, &maxcount);
3376 if (nfserr) {
3377 /*
3378 * nfsd_splice_actor may have already messed with the
3379 * page length; reset it so as not to confuse
3380 * xdr_truncate_encode:
3381 */
3382 buf->page_len = 0;
3383 return nfserr;
3384 }
3385
3386 eof = nfsd_eof_on_read(len, maxcount, read->rd_offset,
3387 d_inode(read->rd_fhp->fh_dentry)->i_size);
3388
3389 *(p++) = htonl(eof);
3390 *(p++) = htonl(maxcount);
3391
3392 buf->page_len = maxcount;
3393 buf->len += maxcount;
3394 xdr->page_ptr += (buf->page_base + maxcount + PAGE_SIZE - 1)
3395 / PAGE_SIZE;
3396
3397 /* Use rest of head for padding and remaining ops: */
3398 buf->tail[0].iov_base = xdr->p;
3399 buf->tail[0].iov_len = 0;
3400 xdr->iov = buf->tail;
3401 if (maxcount&3) {
3402 int pad = 4 - (maxcount&3);
3403
3404 *(xdr->p++) = 0;
3405
3406 buf->tail[0].iov_base += maxcount&3;
3407 buf->tail[0].iov_len = pad;
3408 buf->len += pad;
3409 }
3410
3411 space_left = min_t(int, (void *)xdr->end - (void *)xdr->p,
3412 buf->buflen - buf->len);
3413 buf->buflen = buf->len + space_left;
3414 xdr->end = (__be32 *)((void *)xdr->end + space_left);
3415
3416 return 0;
3417 }
3418
3419 static __be32 nfsd4_encode_readv(struct nfsd4_compoundres *resp,
3420 struct nfsd4_read *read,
3421 struct file *file, unsigned long maxcount)
3422 {
3423 struct xdr_stream *xdr = &resp->xdr;
3424 u32 eof;
3425 int v;
3426 int starting_len = xdr->buf->len - 8;
3427 long len;
3428 int thislen;
3429 __be32 nfserr;
3430 __be32 tmp;
3431 __be32 *p;
3432 u32 zzz = 0;
3433 int pad;
3434
3435 len = maxcount;
3436 v = 0;
3437
3438 thislen = min_t(long, len, ((void *)xdr->end - (void *)xdr->p));
3439 p = xdr_reserve_space(xdr, (thislen+3)&~3);
3440 WARN_ON_ONCE(!p);
3441 resp->rqstp->rq_vec[v].iov_base = p;
3442 resp->rqstp->rq_vec[v].iov_len = thislen;
3443 v++;
3444 len -= thislen;
3445
3446 while (len) {
3447 thislen = min_t(long, len, PAGE_SIZE);
3448 p = xdr_reserve_space(xdr, (thislen+3)&~3);
3449 WARN_ON_ONCE(!p);
3450 resp->rqstp->rq_vec[v].iov_base = p;
3451 resp->rqstp->rq_vec[v].iov_len = thislen;
3452 v++;
3453 len -= thislen;
3454 }
3455 read->rd_vlen = v;
3456
3457 len = maxcount;
3458 nfserr = nfsd_readv(file, read->rd_offset, resp->rqstp->rq_vec,
3459 read->rd_vlen, &maxcount);
3460 if (nfserr)
3461 return nfserr;
3462 xdr_truncate_encode(xdr, starting_len + 8 + ((maxcount+3)&~3));
3463
3464 eof = nfsd_eof_on_read(len, maxcount, read->rd_offset,
3465 d_inode(read->rd_fhp->fh_dentry)->i_size);
3466
3467 tmp = htonl(eof);
3468 write_bytes_to_xdr_buf(xdr->buf, starting_len , &tmp, 4);
3469 tmp = htonl(maxcount);
3470 write_bytes_to_xdr_buf(xdr->buf, starting_len + 4, &tmp, 4);
3471
3472 pad = (maxcount&3) ? 4 - (maxcount&3) : 0;
3473 write_bytes_to_xdr_buf(xdr->buf, starting_len + 8 + maxcount,
3474 &zzz, pad);
3475 return 0;
3476
3477 }
3478
3479 static __be32
3480 nfsd4_encode_read(struct nfsd4_compoundres *resp, __be32 nfserr,
3481 struct nfsd4_read *read)
3482 {
3483 unsigned long maxcount;
3484 struct xdr_stream *xdr = &resp->xdr;
3485 struct file *file = read->rd_filp;
3486 int starting_len = xdr->buf->len;
3487 struct raparms *ra = NULL;
3488 __be32 *p;
3489
3490 if (nfserr)
3491 goto out;
3492
3493 p = xdr_reserve_space(xdr, 8); /* eof flag and byte count */
3494 if (!p) {
3495 WARN_ON_ONCE(test_bit(RQ_SPLICE_OK, &resp->rqstp->rq_flags));
3496 nfserr = nfserr_resource;
3497 goto out;
3498 }
3499 if (resp->xdr.buf->page_len &&
3500 test_bit(RQ_SPLICE_OK, &resp->rqstp->rq_flags)) {
3501 WARN_ON_ONCE(1);
3502 nfserr = nfserr_resource;
3503 goto out;
3504 }
3505 xdr_commit_encode(xdr);
3506
3507 maxcount = svc_max_payload(resp->rqstp);
3508 maxcount = min_t(unsigned long, maxcount,
3509 (xdr->buf->buflen - xdr->buf->len));
3510 maxcount = min_t(unsigned long, maxcount, read->rd_length);
3511
3512 if (read->rd_tmp_file)
3513 ra = nfsd_init_raparms(file);
3514
3515 if (file->f_op->splice_read &&
3516 test_bit(RQ_SPLICE_OK, &resp->rqstp->rq_flags))
3517 nfserr = nfsd4_encode_splice_read(resp, read, file, maxcount);
3518 else
3519 nfserr = nfsd4_encode_readv(resp, read, file, maxcount);
3520
3521 if (ra)
3522 nfsd_put_raparams(file, ra);
3523
3524 if (nfserr)
3525 xdr_truncate_encode(xdr, starting_len);
3526
3527 out:
3528 if (file)
3529 fput(file);
3530 return nfserr;
3531 }
3532
3533 static __be32
3534 nfsd4_encode_readlink(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readlink *readlink)
3535 {
3536 int maxcount;
3537 __be32 wire_count;
3538 int zero = 0;
3539 struct xdr_stream *xdr = &resp->xdr;
3540 int length_offset = xdr->buf->len;
3541 __be32 *p;
3542
3543 if (nfserr)
3544 return nfserr;
3545
3546 p = xdr_reserve_space(xdr, 4);
3547 if (!p)
3548 return nfserr_resource;
3549 maxcount = PAGE_SIZE;
3550
3551 p = xdr_reserve_space(xdr, maxcount);
3552 if (!p)
3553 return nfserr_resource;
3554 /*
3555 * XXX: By default, the ->readlink() VFS op will truncate symlinks
3556 * if they would overflow the buffer. Is this kosher in NFSv4? If
3557 * not, one easy fix is: if ->readlink() precisely fills the buffer,
3558 * assume that truncation occurred, and return NFS4ERR_RESOURCE.
3559 */
3560 nfserr = nfsd_readlink(readlink->rl_rqstp, readlink->rl_fhp,
3561 (char *)p, &maxcount);
3562 if (nfserr == nfserr_isdir)
3563 nfserr = nfserr_inval;
3564 if (nfserr) {
3565 xdr_truncate_encode(xdr, length_offset);
3566 return nfserr;
3567 }
3568
3569 wire_count = htonl(maxcount);
3570 write_bytes_to_xdr_buf(xdr->buf, length_offset, &wire_count, 4);
3571 xdr_truncate_encode(xdr, length_offset + 4 + ALIGN(maxcount, 4));
3572 if (maxcount & 3)
3573 write_bytes_to_xdr_buf(xdr->buf, length_offset + 4 + maxcount,
3574 &zero, 4 - (maxcount&3));
3575 return 0;
3576 }
3577
3578 static __be32
3579 nfsd4_encode_readdir(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readdir *readdir)
3580 {
3581 int maxcount;
3582 int bytes_left;
3583 loff_t offset;
3584 __be64 wire_offset;
3585 struct xdr_stream *xdr = &resp->xdr;
3586 int starting_len = xdr->buf->len;
3587 __be32 *p;
3588
3589 if (nfserr)
3590 return nfserr;
3591
3592 p = xdr_reserve_space(xdr, NFS4_VERIFIER_SIZE);
3593 if (!p)
3594 return nfserr_resource;
3595
3596 /* XXX: Following NFSv3, we ignore the READDIR verifier for now. */
3597 *p++ = cpu_to_be32(0);
3598 *p++ = cpu_to_be32(0);
3599 resp->xdr.buf->head[0].iov_len = ((char *)resp->xdr.p)
3600 - (char *)resp->xdr.buf->head[0].iov_base;
3601
3602 /*
3603 * Number of bytes left for directory entries allowing for the
3604 * final 8 bytes of the readdir and a following failed op:
3605 */
3606 bytes_left = xdr->buf->buflen - xdr->buf->len
3607 - COMPOUND_ERR_SLACK_SPACE - 8;
3608 if (bytes_left < 0) {
3609 nfserr = nfserr_resource;
3610 goto err_no_verf;
3611 }
3612 maxcount = min_t(u32, readdir->rd_maxcount, INT_MAX);
3613 /*
3614 * Note the rfc defines rd_maxcount as the size of the
3615 * READDIR4resok structure, which includes the verifier above
3616 * and the 8 bytes encoded at the end of this function:
3617 */
3618 if (maxcount < 16) {
3619 nfserr = nfserr_toosmall;
3620 goto err_no_verf;
3621 }
3622 maxcount = min_t(int, maxcount-16, bytes_left);
3623
3624 /* RFC 3530 14.2.24 allows us to ignore dircount when it's 0: */
3625 if (!readdir->rd_dircount)
3626 readdir->rd_dircount = INT_MAX;
3627
3628 readdir->xdr = xdr;
3629 readdir->rd_maxcount = maxcount;
3630 readdir->common.err = 0;
3631 readdir->cookie_offset = 0;
3632
3633 offset = readdir->rd_cookie;
3634 nfserr = nfsd_readdir(readdir->rd_rqstp, readdir->rd_fhp,
3635 &offset,
3636 &readdir->common, nfsd4_encode_dirent);
3637 if (nfserr == nfs_ok &&
3638 readdir->common.err == nfserr_toosmall &&
3639 xdr->buf->len == starting_len + 8) {
3640 /* nothing encoded; which limit did we hit?: */
3641 if (maxcount - 16 < bytes_left)
3642 /* It was the fault of rd_maxcount: */
3643 nfserr = nfserr_toosmall;
3644 else
3645 /* We ran out of buffer space: */
3646 nfserr = nfserr_resource;
3647 }
3648 if (nfserr)
3649 goto err_no_verf;
3650
3651 if (readdir->cookie_offset) {
3652 wire_offset = cpu_to_be64(offset);
3653 write_bytes_to_xdr_buf(xdr->buf, readdir->cookie_offset,
3654 &wire_offset, 8);
3655 }
3656
3657 p = xdr_reserve_space(xdr, 8);
3658 if (!p) {
3659 WARN_ON_ONCE(1);
3660 goto err_no_verf;
3661 }
3662 *p++ = 0; /* no more entries */
3663 *p++ = htonl(readdir->common.err == nfserr_eof);
3664
3665 return 0;
3666 err_no_verf:
3667 xdr_truncate_encode(xdr, starting_len);
3668 return nfserr;
3669 }
3670
3671 static __be32
3672 nfsd4_encode_remove(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_remove *remove)
3673 {
3674 struct xdr_stream *xdr = &resp->xdr;
3675 __be32 *p;
3676
3677 if (!nfserr) {
3678 p = xdr_reserve_space(xdr, 20);
3679 if (!p)
3680 return nfserr_resource;
3681 p = encode_cinfo(p, &remove->rm_cinfo);
3682 }
3683 return nfserr;
3684 }
3685
3686 static __be32
3687 nfsd4_encode_rename(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_rename *rename)
3688 {
3689 struct xdr_stream *xdr = &resp->xdr;
3690 __be32 *p;
3691
3692 if (!nfserr) {
3693 p = xdr_reserve_space(xdr, 40);
3694 if (!p)
3695 return nfserr_resource;
3696 p = encode_cinfo(p, &rename->rn_sinfo);
3697 p = encode_cinfo(p, &rename->rn_tinfo);
3698 }
3699 return nfserr;
3700 }
3701
3702 static __be32
3703 nfsd4_do_encode_secinfo(struct xdr_stream *xdr,
3704 __be32 nfserr, struct svc_export *exp)
3705 {
3706 u32 i, nflavs, supported;
3707 struct exp_flavor_info *flavs;
3708 struct exp_flavor_info def_flavs[2];
3709 __be32 *p, *flavorsp;
3710 static bool report = true;
3711
3712 if (nfserr)
3713 goto out;
3714 nfserr = nfserr_resource;
3715 if (exp->ex_nflavors) {
3716 flavs = exp->ex_flavors;
3717 nflavs = exp->ex_nflavors;
3718 } else { /* Handling of some defaults in absence of real secinfo: */
3719 flavs = def_flavs;
3720 if (exp->ex_client->flavour->flavour == RPC_AUTH_UNIX) {
3721 nflavs = 2;
3722 flavs[0].pseudoflavor = RPC_AUTH_UNIX;
3723 flavs[1].pseudoflavor = RPC_AUTH_NULL;
3724 } else if (exp->ex_client->flavour->flavour == RPC_AUTH_GSS) {
3725 nflavs = 1;
3726 flavs[0].pseudoflavor
3727 = svcauth_gss_flavor(exp->ex_client);
3728 } else {
3729 nflavs = 1;
3730 flavs[0].pseudoflavor
3731 = exp->ex_client->flavour->flavour;
3732 }
3733 }
3734
3735 supported = 0;
3736 p = xdr_reserve_space(xdr, 4);
3737 if (!p)
3738 goto out;
3739 flavorsp = p++; /* to be backfilled later */
3740
3741 for (i = 0; i < nflavs; i++) {
3742 rpc_authflavor_t pf = flavs[i].pseudoflavor;
3743 struct rpcsec_gss_info info;
3744
3745 if (rpcauth_get_gssinfo(pf, &info) == 0) {
3746 supported++;
3747 p = xdr_reserve_space(xdr, 4 + 4 +
3748 XDR_LEN(info.oid.len) + 4 + 4);
3749 if (!p)
3750 goto out;
3751 *p++ = cpu_to_be32(RPC_AUTH_GSS);
3752 p = xdr_encode_opaque(p, info.oid.data, info.oid.len);
3753 *p++ = cpu_to_be32(info.qop);
3754 *p++ = cpu_to_be32(info.service);
3755 } else if (pf < RPC_AUTH_MAXFLAVOR) {
3756 supported++;
3757 p = xdr_reserve_space(xdr, 4);
3758 if (!p)
3759 goto out;
3760 *p++ = cpu_to_be32(pf);
3761 } else {
3762 if (report)
3763 pr_warn("NFS: SECINFO: security flavor %u "
3764 "is not supported\n", pf);
3765 }
3766 }
3767
3768 if (nflavs != supported)
3769 report = false;
3770 *flavorsp = htonl(supported);
3771 nfserr = 0;
3772 out:
3773 if (exp)
3774 exp_put(exp);
3775 return nfserr;
3776 }
3777
3778 static __be32
3779 nfsd4_encode_secinfo(struct nfsd4_compoundres *resp, __be32 nfserr,
3780 struct nfsd4_secinfo *secinfo)
3781 {
3782 struct xdr_stream *xdr = &resp->xdr;
3783
3784 return nfsd4_do_encode_secinfo(xdr, nfserr, secinfo->si_exp);
3785 }
3786
3787 static __be32
3788 nfsd4_encode_secinfo_no_name(struct nfsd4_compoundres *resp, __be32 nfserr,
3789 struct nfsd4_secinfo_no_name *secinfo)
3790 {
3791 struct xdr_stream *xdr = &resp->xdr;
3792
3793 return nfsd4_do_encode_secinfo(xdr, nfserr, secinfo->sin_exp);
3794 }
3795
3796 /*
3797 * The SETATTR encode routine is special -- it always encodes a bitmap,
3798 * regardless of the error status.
3799 */
3800 static __be32
3801 nfsd4_encode_setattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setattr *setattr)
3802 {
3803 struct xdr_stream *xdr = &resp->xdr;
3804 __be32 *p;
3805
3806 p = xdr_reserve_space(xdr, 16);
3807 if (!p)
3808 return nfserr_resource;
3809 if (nfserr) {
3810 *p++ = cpu_to_be32(3);
3811 *p++ = cpu_to_be32(0);
3812 *p++ = cpu_to_be32(0);
3813 *p++ = cpu_to_be32(0);
3814 }
3815 else {
3816 *p++ = cpu_to_be32(3);
3817 *p++ = cpu_to_be32(setattr->sa_bmval[0]);
3818 *p++ = cpu_to_be32(setattr->sa_bmval[1]);
3819 *p++ = cpu_to_be32(setattr->sa_bmval[2]);
3820 }
3821 return nfserr;
3822 }
3823
3824 static __be32
3825 nfsd4_encode_setclientid(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setclientid *scd)
3826 {
3827 struct xdr_stream *xdr = &resp->xdr;
3828 __be32 *p;
3829
3830 if (!nfserr) {
3831 p = xdr_reserve_space(xdr, 8 + NFS4_VERIFIER_SIZE);
3832 if (!p)
3833 return nfserr_resource;
3834 p = xdr_encode_opaque_fixed(p, &scd->se_clientid, 8);
3835 p = xdr_encode_opaque_fixed(p, &scd->se_confirm,
3836 NFS4_VERIFIER_SIZE);
3837 }
3838 else if (nfserr == nfserr_clid_inuse) {
3839 p = xdr_reserve_space(xdr, 8);
3840 if (!p)
3841 return nfserr_resource;
3842 *p++ = cpu_to_be32(0);
3843 *p++ = cpu_to_be32(0);
3844 }
3845 return nfserr;
3846 }
3847
3848 static __be32
3849 nfsd4_encode_write(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_write *write)
3850 {
3851 struct xdr_stream *xdr = &resp->xdr;
3852 __be32 *p;
3853
3854 if (!nfserr) {
3855 p = xdr_reserve_space(xdr, 16);
3856 if (!p)
3857 return nfserr_resource;
3858 *p++ = cpu_to_be32(write->wr_bytes_written);
3859 *p++ = cpu_to_be32(write->wr_how_written);
3860 p = xdr_encode_opaque_fixed(p, write->wr_verifier.data,
3861 NFS4_VERIFIER_SIZE);
3862 }
3863 return nfserr;
3864 }
3865
3866 static __be32
3867 nfsd4_encode_exchange_id(struct nfsd4_compoundres *resp, __be32 nfserr,
3868 struct nfsd4_exchange_id *exid)
3869 {
3870 struct xdr_stream *xdr = &resp->xdr;
3871 __be32 *p;
3872 char *major_id;
3873 char *server_scope;
3874 int major_id_sz;
3875 int server_scope_sz;
3876 int status = 0;
3877 uint64_t minor_id = 0;
3878
3879 if (nfserr)
3880 return nfserr;
3881
3882 major_id = utsname()->nodename;
3883 major_id_sz = strlen(major_id);
3884 server_scope = utsname()->nodename;
3885 server_scope_sz = strlen(server_scope);
3886
3887 p = xdr_reserve_space(xdr,
3888 8 /* eir_clientid */ +
3889 4 /* eir_sequenceid */ +
3890 4 /* eir_flags */ +
3891 4 /* spr_how */);
3892 if (!p)
3893 return nfserr_resource;
3894
3895 p = xdr_encode_opaque_fixed(p, &exid->clientid, 8);
3896 *p++ = cpu_to_be32(exid->seqid);
3897 *p++ = cpu_to_be32(exid->flags);
3898
3899 *p++ = cpu_to_be32(exid->spa_how);
3900
3901 switch (exid->spa_how) {
3902 case SP4_NONE:
3903 break;
3904 case SP4_MACH_CRED:
3905 /* spo_must_enforce bitmap: */
3906 status = nfsd4_encode_bitmap(xdr,
3907 exid->spo_must_enforce[0],
3908 exid->spo_must_enforce[1],
3909 exid->spo_must_enforce[2]);
3910 if (status)
3911 goto out;
3912 /* spo_must_allow bitmap: */
3913 status = nfsd4_encode_bitmap(xdr,
3914 exid->spo_must_allow[0],
3915 exid->spo_must_allow[1],
3916 exid->spo_must_allow[2]);
3917 if (status)
3918 goto out;
3919 break;
3920 default:
3921 WARN_ON_ONCE(1);
3922 }
3923
3924 p = xdr_reserve_space(xdr,
3925 8 /* so_minor_id */ +
3926 4 /* so_major_id.len */ +
3927 (XDR_QUADLEN(major_id_sz) * 4) +
3928 4 /* eir_server_scope.len */ +
3929 (XDR_QUADLEN(server_scope_sz) * 4) +
3930 4 /* eir_server_impl_id.count (0) */);
3931 if (!p)
3932 return nfserr_resource;
3933
3934 /* The server_owner struct */
3935 p = xdr_encode_hyper(p, minor_id); /* Minor id */
3936 /* major id */
3937 p = xdr_encode_opaque(p, major_id, major_id_sz);
3938
3939 /* Server scope */
3940 p = xdr_encode_opaque(p, server_scope, server_scope_sz);
3941
3942 /* Implementation id */
3943 *p++ = cpu_to_be32(0); /* zero length nfs_impl_id4 array */
3944 return 0;
3945 out:
3946 return status;
3947 }
3948
3949 static __be32
3950 nfsd4_encode_create_session(struct nfsd4_compoundres *resp, __be32 nfserr,
3951 struct nfsd4_create_session *sess)
3952 {
3953 struct xdr_stream *xdr = &resp->xdr;
3954 __be32 *p;
3955
3956 if (nfserr)
3957 return nfserr;
3958
3959 p = xdr_reserve_space(xdr, 24);
3960 if (!p)
3961 return nfserr_resource;
3962 p = xdr_encode_opaque_fixed(p, sess->sessionid.data,
3963 NFS4_MAX_SESSIONID_LEN);
3964 *p++ = cpu_to_be32(sess->seqid);
3965 *p++ = cpu_to_be32(sess->flags);
3966
3967 p = xdr_reserve_space(xdr, 28);
3968 if (!p)
3969 return nfserr_resource;
3970 *p++ = cpu_to_be32(0); /* headerpadsz */
3971 *p++ = cpu_to_be32(sess->fore_channel.maxreq_sz);
3972 *p++ = cpu_to_be32(sess->fore_channel.maxresp_sz);
3973 *p++ = cpu_to_be32(sess->fore_channel.maxresp_cached);
3974 *p++ = cpu_to_be32(sess->fore_channel.maxops);
3975 *p++ = cpu_to_be32(sess->fore_channel.maxreqs);
3976 *p++ = cpu_to_be32(sess->fore_channel.nr_rdma_attrs);
3977
3978 if (sess->fore_channel.nr_rdma_attrs) {
3979 p = xdr_reserve_space(xdr, 4);
3980 if (!p)
3981 return nfserr_resource;
3982 *p++ = cpu_to_be32(sess->fore_channel.rdma_attrs);
3983 }
3984
3985 p = xdr_reserve_space(xdr, 28);
3986 if (!p)
3987 return nfserr_resource;
3988 *p++ = cpu_to_be32(0); /* headerpadsz */
3989 *p++ = cpu_to_be32(sess->back_channel.maxreq_sz);
3990 *p++ = cpu_to_be32(sess->back_channel.maxresp_sz);
3991 *p++ = cpu_to_be32(sess->back_channel.maxresp_cached);
3992 *p++ = cpu_to_be32(sess->back_channel.maxops);
3993 *p++ = cpu_to_be32(sess->back_channel.maxreqs);
3994 *p++ = cpu_to_be32(sess->back_channel.nr_rdma_attrs);
3995
3996 if (sess->back_channel.nr_rdma_attrs) {
3997 p = xdr_reserve_space(xdr, 4);
3998 if (!p)
3999 return nfserr_resource;
4000 *p++ = cpu_to_be32(sess->back_channel.rdma_attrs);
4001 }
4002 return 0;
4003 }
4004
4005 static __be32
4006 nfsd4_encode_sequence(struct nfsd4_compoundres *resp, __be32 nfserr,
4007 struct nfsd4_sequence *seq)
4008 {
4009 struct xdr_stream *xdr = &resp->xdr;
4010 __be32 *p;
4011
4012 if (nfserr)
4013 return nfserr;
4014
4015 p = xdr_reserve_space(xdr, NFS4_MAX_SESSIONID_LEN + 20);
4016 if (!p)
4017 return nfserr_resource;
4018 p = xdr_encode_opaque_fixed(p, seq->sessionid.data,
4019 NFS4_MAX_SESSIONID_LEN);
4020 *p++ = cpu_to_be32(seq->seqid);
4021 *p++ = cpu_to_be32(seq->slotid);
4022 /* Note slotid's are numbered from zero: */
4023 *p++ = cpu_to_be32(seq->maxslots - 1); /* sr_highest_slotid */
4024 *p++ = cpu_to_be32(seq->maxslots - 1); /* sr_target_highest_slotid */
4025 *p++ = cpu_to_be32(seq->status_flags);
4026
4027 resp->cstate.data_offset = xdr->buf->len; /* DRC cache data pointer */
4028 return 0;
4029 }
4030
4031 static __be32
4032 nfsd4_encode_test_stateid(struct nfsd4_compoundres *resp, __be32 nfserr,
4033 struct nfsd4_test_stateid *test_stateid)
4034 {
4035 struct xdr_stream *xdr = &resp->xdr;
4036 struct nfsd4_test_stateid_id *stateid, *next;
4037 __be32 *p;
4038
4039 if (nfserr)
4040 return nfserr;
4041
4042 p = xdr_reserve_space(xdr, 4 + (4 * test_stateid->ts_num_ids));
4043 if (!p)
4044 return nfserr_resource;
4045 *p++ = htonl(test_stateid->ts_num_ids);
4046
4047 list_for_each_entry_safe(stateid, next, &test_stateid->ts_stateid_list, ts_id_list) {
4048 *p++ = stateid->ts_id_status;
4049 }
4050
4051 return nfserr;
4052 }
4053
4054 #ifdef CONFIG_NFSD_PNFS
4055 static __be32
4056 nfsd4_encode_getdeviceinfo(struct nfsd4_compoundres *resp, __be32 nfserr,
4057 struct nfsd4_getdeviceinfo *gdev)
4058 {
4059 struct xdr_stream *xdr = &resp->xdr;
4060 const struct nfsd4_layout_ops *ops =
4061 nfsd4_layout_ops[gdev->gd_layout_type];
4062 u32 starting_len = xdr->buf->len, needed_len;
4063 __be32 *p;
4064
4065 dprintk("%s: err %d\n", __func__, nfserr);
4066 if (nfserr)
4067 goto out;
4068
4069 nfserr = nfserr_resource;
4070 p = xdr_reserve_space(xdr, 4);
4071 if (!p)
4072 goto out;
4073
4074 *p++ = cpu_to_be32(gdev->gd_layout_type);
4075
4076 /* If maxcount is 0 then just update notifications */
4077 if (gdev->gd_maxcount != 0) {
4078 nfserr = ops->encode_getdeviceinfo(xdr, gdev);
4079 if (nfserr) {
4080 /*
4081 * We don't bother to burden the layout drivers with
4082 * enforcing gd_maxcount, just tell the client to
4083 * come back with a bigger buffer if it's not enough.
4084 */
4085 if (xdr->buf->len + 4 > gdev->gd_maxcount)
4086 goto toosmall;
4087 goto out;
4088 }
4089 }
4090
4091 nfserr = nfserr_resource;
4092 if (gdev->gd_notify_types) {
4093 p = xdr_reserve_space(xdr, 4 + 4);
4094 if (!p)
4095 goto out;
4096 *p++ = cpu_to_be32(1); /* bitmap length */
4097 *p++ = cpu_to_be32(gdev->gd_notify_types);
4098 } else {
4099 p = xdr_reserve_space(xdr, 4);
4100 if (!p)
4101 goto out;
4102 *p++ = 0;
4103 }
4104
4105 nfserr = 0;
4106 out:
4107 kfree(gdev->gd_device);
4108 dprintk("%s: done: %d\n", __func__, be32_to_cpu(nfserr));
4109 return nfserr;
4110
4111 toosmall:
4112 dprintk("%s: maxcount too small\n", __func__);
4113 needed_len = xdr->buf->len + 4 /* notifications */;
4114 xdr_truncate_encode(xdr, starting_len);
4115 p = xdr_reserve_space(xdr, 4);
4116 if (!p) {
4117 nfserr = nfserr_resource;
4118 } else {
4119 *p++ = cpu_to_be32(needed_len);
4120 nfserr = nfserr_toosmall;
4121 }
4122 goto out;
4123 }
4124
4125 static __be32
4126 nfsd4_encode_layoutget(struct nfsd4_compoundres *resp, __be32 nfserr,
4127 struct nfsd4_layoutget *lgp)
4128 {
4129 struct xdr_stream *xdr = &resp->xdr;
4130 const struct nfsd4_layout_ops *ops =
4131 nfsd4_layout_ops[lgp->lg_layout_type];
4132 __be32 *p;
4133
4134 dprintk("%s: err %d\n", __func__, nfserr);
4135 if (nfserr)
4136 goto out;
4137
4138 nfserr = nfserr_resource;
4139 p = xdr_reserve_space(xdr, 36 + sizeof(stateid_opaque_t));
4140 if (!p)
4141 goto out;
4142
4143 *p++ = cpu_to_be32(1); /* we always set return-on-close */
4144 *p++ = cpu_to_be32(lgp->lg_sid.si_generation);
4145 p = xdr_encode_opaque_fixed(p, &lgp->lg_sid.si_opaque,
4146 sizeof(stateid_opaque_t));
4147
4148 *p++ = cpu_to_be32(1); /* we always return a single layout */
4149 p = xdr_encode_hyper(p, lgp->lg_seg.offset);
4150 p = xdr_encode_hyper(p, lgp->lg_seg.length);
4151 *p++ = cpu_to_be32(lgp->lg_seg.iomode);
4152 *p++ = cpu_to_be32(lgp->lg_layout_type);
4153
4154 nfserr = ops->encode_layoutget(xdr, lgp);
4155 out:
4156 kfree(lgp->lg_content);
4157 return nfserr;
4158 }
4159
4160 static __be32
4161 nfsd4_encode_layoutcommit(struct nfsd4_compoundres *resp, __be32 nfserr,
4162 struct nfsd4_layoutcommit *lcp)
4163 {
4164 struct xdr_stream *xdr = &resp->xdr;
4165 __be32 *p;
4166
4167 if (nfserr)
4168 return nfserr;
4169
4170 p = xdr_reserve_space(xdr, 4);
4171 if (!p)
4172 return nfserr_resource;
4173 *p++ = cpu_to_be32(lcp->lc_size_chg);
4174 if (lcp->lc_size_chg) {
4175 p = xdr_reserve_space(xdr, 8);
4176 if (!p)
4177 return nfserr_resource;
4178 p = xdr_encode_hyper(p, lcp->lc_newsize);
4179 }
4180
4181 return nfs_ok;
4182 }
4183
4184 static __be32
4185 nfsd4_encode_layoutreturn(struct nfsd4_compoundres *resp, __be32 nfserr,
4186 struct nfsd4_layoutreturn *lrp)
4187 {
4188 struct xdr_stream *xdr = &resp->xdr;
4189 __be32 *p;
4190
4191 if (nfserr)
4192 return nfserr;
4193
4194 p = xdr_reserve_space(xdr, 4);
4195 if (!p)
4196 return nfserr_resource;
4197 *p++ = cpu_to_be32(lrp->lrs_present);
4198 if (lrp->lrs_present)
4199 return nfsd4_encode_stateid(xdr, &lrp->lr_sid);
4200 return nfs_ok;
4201 }
4202 #endif /* CONFIG_NFSD_PNFS */
4203
4204 static __be32
4205 nfsd4_encode_seek(struct nfsd4_compoundres *resp, __be32 nfserr,
4206 struct nfsd4_seek *seek)
4207 {
4208 __be32 *p;
4209
4210 if (nfserr)
4211 return nfserr;
4212
4213 p = xdr_reserve_space(&resp->xdr, 4 + 8);
4214 *p++ = cpu_to_be32(seek->seek_eof);
4215 p = xdr_encode_hyper(p, seek->seek_pos);
4216
4217 return nfserr;
4218 }
4219
4220 static __be32
4221 nfsd4_encode_noop(struct nfsd4_compoundres *resp, __be32 nfserr, void *p)
4222 {
4223 return nfserr;
4224 }
4225
4226 typedef __be32(* nfsd4_enc)(struct nfsd4_compoundres *, __be32, void *);
4227
4228 /*
4229 * Note: nfsd4_enc_ops vector is shared for v4.0 and v4.1
4230 * since we don't need to filter out obsolete ops as this is
4231 * done in the decoding phase.
4232 */
4233 static nfsd4_enc nfsd4_enc_ops[] = {
4234 [OP_ACCESS] = (nfsd4_enc)nfsd4_encode_access,
4235 [OP_CLOSE] = (nfsd4_enc)nfsd4_encode_close,
4236 [OP_COMMIT] = (nfsd4_enc)nfsd4_encode_commit,
4237 [OP_CREATE] = (nfsd4_enc)nfsd4_encode_create,
4238 [OP_DELEGPURGE] = (nfsd4_enc)nfsd4_encode_noop,
4239 [OP_DELEGRETURN] = (nfsd4_enc)nfsd4_encode_noop,
4240 [OP_GETATTR] = (nfsd4_enc)nfsd4_encode_getattr,
4241 [OP_GETFH] = (nfsd4_enc)nfsd4_encode_getfh,
4242 [OP_LINK] = (nfsd4_enc)nfsd4_encode_link,
4243 [OP_LOCK] = (nfsd4_enc)nfsd4_encode_lock,
4244 [OP_LOCKT] = (nfsd4_enc)nfsd4_encode_lockt,
4245 [OP_LOCKU] = (nfsd4_enc)nfsd4_encode_locku,
4246 [OP_LOOKUP] = (nfsd4_enc)nfsd4_encode_noop,
4247 [OP_LOOKUPP] = (nfsd4_enc)nfsd4_encode_noop,
4248 [OP_NVERIFY] = (nfsd4_enc)nfsd4_encode_noop,
4249 [OP_OPEN] = (nfsd4_enc)nfsd4_encode_open,
4250 [OP_OPENATTR] = (nfsd4_enc)nfsd4_encode_noop,
4251 [OP_OPEN_CONFIRM] = (nfsd4_enc)nfsd4_encode_open_confirm,
4252 [OP_OPEN_DOWNGRADE] = (nfsd4_enc)nfsd4_encode_open_downgrade,
4253 [OP_PUTFH] = (nfsd4_enc)nfsd4_encode_noop,
4254 [OP_PUTPUBFH] = (nfsd4_enc)nfsd4_encode_noop,
4255 [OP_PUTROOTFH] = (nfsd4_enc)nfsd4_encode_noop,
4256 [OP_READ] = (nfsd4_enc)nfsd4_encode_read,
4257 [OP_READDIR] = (nfsd4_enc)nfsd4_encode_readdir,
4258 [OP_READLINK] = (nfsd4_enc)nfsd4_encode_readlink,
4259 [OP_REMOVE] = (nfsd4_enc)nfsd4_encode_remove,
4260 [OP_RENAME] = (nfsd4_enc)nfsd4_encode_rename,
4261 [OP_RENEW] = (nfsd4_enc)nfsd4_encode_noop,
4262 [OP_RESTOREFH] = (nfsd4_enc)nfsd4_encode_noop,
4263 [OP_SAVEFH] = (nfsd4_enc)nfsd4_encode_noop,
4264 [OP_SECINFO] = (nfsd4_enc)nfsd4_encode_secinfo,
4265 [OP_SETATTR] = (nfsd4_enc)nfsd4_encode_setattr,
4266 [OP_SETCLIENTID] = (nfsd4_enc)nfsd4_encode_setclientid,
4267 [OP_SETCLIENTID_CONFIRM] = (nfsd4_enc)nfsd4_encode_noop,
4268 [OP_VERIFY] = (nfsd4_enc)nfsd4_encode_noop,
4269 [OP_WRITE] = (nfsd4_enc)nfsd4_encode_write,
4270 [OP_RELEASE_LOCKOWNER] = (nfsd4_enc)nfsd4_encode_noop,
4271
4272 /* NFSv4.1 operations */
4273 [OP_BACKCHANNEL_CTL] = (nfsd4_enc)nfsd4_encode_noop,
4274 [OP_BIND_CONN_TO_SESSION] = (nfsd4_enc)nfsd4_encode_bind_conn_to_session,
4275 [OP_EXCHANGE_ID] = (nfsd4_enc)nfsd4_encode_exchange_id,
4276 [OP_CREATE_SESSION] = (nfsd4_enc)nfsd4_encode_create_session,
4277 [OP_DESTROY_SESSION] = (nfsd4_enc)nfsd4_encode_noop,
4278 [OP_FREE_STATEID] = (nfsd4_enc)nfsd4_encode_noop,
4279 [OP_GET_DIR_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop,
4280 #ifdef CONFIG_NFSD_PNFS
4281 [OP_GETDEVICEINFO] = (nfsd4_enc)nfsd4_encode_getdeviceinfo,
4282 [OP_GETDEVICELIST] = (nfsd4_enc)nfsd4_encode_noop,
4283 [OP_LAYOUTCOMMIT] = (nfsd4_enc)nfsd4_encode_layoutcommit,
4284 [OP_LAYOUTGET] = (nfsd4_enc)nfsd4_encode_layoutget,
4285 [OP_LAYOUTRETURN] = (nfsd4_enc)nfsd4_encode_layoutreturn,
4286 #else
4287 [OP_GETDEVICEINFO] = (nfsd4_enc)nfsd4_encode_noop,
4288 [OP_GETDEVICELIST] = (nfsd4_enc)nfsd4_encode_noop,
4289 [OP_LAYOUTCOMMIT] = (nfsd4_enc)nfsd4_encode_noop,
4290 [OP_LAYOUTGET] = (nfsd4_enc)nfsd4_encode_noop,
4291 [OP_LAYOUTRETURN] = (nfsd4_enc)nfsd4_encode_noop,
4292 #endif
4293 [OP_SECINFO_NO_NAME] = (nfsd4_enc)nfsd4_encode_secinfo_no_name,
4294 [OP_SEQUENCE] = (nfsd4_enc)nfsd4_encode_sequence,
4295 [OP_SET_SSV] = (nfsd4_enc)nfsd4_encode_noop,
4296 [OP_TEST_STATEID] = (nfsd4_enc)nfsd4_encode_test_stateid,
4297 [OP_WANT_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop,
4298 [OP_DESTROY_CLIENTID] = (nfsd4_enc)nfsd4_encode_noop,
4299 [OP_RECLAIM_COMPLETE] = (nfsd4_enc)nfsd4_encode_noop,
4300
4301 /* NFSv4.2 operations */
4302 [OP_ALLOCATE] = (nfsd4_enc)nfsd4_encode_noop,
4303 [OP_COPY] = (nfsd4_enc)nfsd4_encode_noop,
4304 [OP_COPY_NOTIFY] = (nfsd4_enc)nfsd4_encode_noop,
4305 [OP_DEALLOCATE] = (nfsd4_enc)nfsd4_encode_noop,
4306 [OP_IO_ADVISE] = (nfsd4_enc)nfsd4_encode_noop,
4307 [OP_LAYOUTERROR] = (nfsd4_enc)nfsd4_encode_noop,
4308 [OP_LAYOUTSTATS] = (nfsd4_enc)nfsd4_encode_noop,
4309 [OP_OFFLOAD_CANCEL] = (nfsd4_enc)nfsd4_encode_noop,
4310 [OP_OFFLOAD_STATUS] = (nfsd4_enc)nfsd4_encode_noop,
4311 [OP_READ_PLUS] = (nfsd4_enc)nfsd4_encode_noop,
4312 [OP_SEEK] = (nfsd4_enc)nfsd4_encode_seek,
4313 [OP_WRITE_SAME] = (nfsd4_enc)nfsd4_encode_noop,
4314 [OP_CLONE] = (nfsd4_enc)nfsd4_encode_noop,
4315 };
4316
4317 /*
4318 * Calculate whether we still have space to encode repsize bytes.
4319 * There are two considerations:
4320 * - For NFS versions >=4.1, the size of the reply must stay within
4321 * session limits
4322 * - For all NFS versions, we must stay within limited preallocated
4323 * buffer space.
4324 *
4325 * This is called before the operation is processed, so can only provide
4326 * an upper estimate. For some nonidempotent operations (such as
4327 * getattr), it's not necessarily a problem if that estimate is wrong,
4328 * as we can fail it after processing without significant side effects.
4329 */
4330 __be32 nfsd4_check_resp_size(struct nfsd4_compoundres *resp, u32 respsize)
4331 {
4332 struct xdr_buf *buf = &resp->rqstp->rq_res;
4333 struct nfsd4_slot *slot = resp->cstate.slot;
4334
4335 if (buf->len + respsize <= buf->buflen)
4336 return nfs_ok;
4337 if (!nfsd4_has_session(&resp->cstate))
4338 return nfserr_resource;
4339 if (slot->sl_flags & NFSD4_SLOT_CACHETHIS) {
4340 WARN_ON_ONCE(1);
4341 return nfserr_rep_too_big_to_cache;
4342 }
4343 return nfserr_rep_too_big;
4344 }
4345
4346 void
4347 nfsd4_encode_operation(struct nfsd4_compoundres *resp, struct nfsd4_op *op)
4348 {
4349 struct xdr_stream *xdr = &resp->xdr;
4350 struct nfs4_stateowner *so = resp->cstate.replay_owner;
4351 struct svc_rqst *rqstp = resp->rqstp;
4352 int post_err_offset;
4353 nfsd4_enc encoder;
4354 __be32 *p;
4355
4356 p = xdr_reserve_space(xdr, 8);
4357 if (!p) {
4358 WARN_ON_ONCE(1);
4359 return;
4360 }
4361 *p++ = cpu_to_be32(op->opnum);
4362 post_err_offset = xdr->buf->len;
4363
4364 if (op->opnum == OP_ILLEGAL)
4365 goto status;
4366 BUG_ON(op->opnum < 0 || op->opnum >= ARRAY_SIZE(nfsd4_enc_ops) ||
4367 !nfsd4_enc_ops[op->opnum]);
4368 encoder = nfsd4_enc_ops[op->opnum];
4369 op->status = encoder(resp, op->status, &op->u);
4370 xdr_commit_encode(xdr);
4371
4372 /* nfsd4_check_resp_size guarantees enough room for error status */
4373 if (!op->status) {
4374 int space_needed = 0;
4375 if (!nfsd4_last_compound_op(rqstp))
4376 space_needed = COMPOUND_ERR_SLACK_SPACE;
4377 op->status = nfsd4_check_resp_size(resp, space_needed);
4378 }
4379 if (op->status == nfserr_resource && nfsd4_has_session(&resp->cstate)) {
4380 struct nfsd4_slot *slot = resp->cstate.slot;
4381
4382 if (slot->sl_flags & NFSD4_SLOT_CACHETHIS)
4383 op->status = nfserr_rep_too_big_to_cache;
4384 else
4385 op->status = nfserr_rep_too_big;
4386 }
4387 if (op->status == nfserr_resource ||
4388 op->status == nfserr_rep_too_big ||
4389 op->status == nfserr_rep_too_big_to_cache) {
4390 /*
4391 * The operation may have already been encoded or
4392 * partially encoded. No op returns anything additional
4393 * in the case of one of these three errors, so we can
4394 * just truncate back to after the status. But it's a
4395 * bug if we had to do this on a non-idempotent op:
4396 */
4397 warn_on_nonidempotent_op(op);
4398 xdr_truncate_encode(xdr, post_err_offset);
4399 }
4400 if (so) {
4401 int len = xdr->buf->len - post_err_offset;
4402
4403 so->so_replay.rp_status = op->status;
4404 so->so_replay.rp_buflen = len;
4405 read_bytes_from_xdr_buf(xdr->buf, post_err_offset,
4406 so->so_replay.rp_buf, len);
4407 }
4408 status:
4409 /* Note that op->status is already in network byte order: */
4410 write_bytes_to_xdr_buf(xdr->buf, post_err_offset - 4, &op->status, 4);
4411 }
4412
4413 /*
4414 * Encode the reply stored in the stateowner reply cache
4415 *
4416 * XDR note: do not encode rp->rp_buflen: the buffer contains the
4417 * previously sent already encoded operation.
4418 */
4419 void
4420 nfsd4_encode_replay(struct xdr_stream *xdr, struct nfsd4_op *op)
4421 {
4422 __be32 *p;
4423 struct nfs4_replay *rp = op->replay;
4424
4425 BUG_ON(!rp);
4426
4427 p = xdr_reserve_space(xdr, 8 + rp->rp_buflen);
4428 if (!p) {
4429 WARN_ON_ONCE(1);
4430 return;
4431 }
4432 *p++ = cpu_to_be32(op->opnum);
4433 *p++ = rp->rp_status; /* already xdr'ed */
4434
4435 p = xdr_encode_opaque_fixed(p, rp->rp_buf, rp->rp_buflen);
4436 }
4437
4438 int
4439 nfs4svc_encode_voidres(struct svc_rqst *rqstp, __be32 *p, void *dummy)
4440 {
4441 return xdr_ressize_check(rqstp, p);
4442 }
4443
4444 int nfsd4_release_compoundargs(void *rq, __be32 *p, void *resp)
4445 {
4446 struct svc_rqst *rqstp = rq;
4447 struct nfsd4_compoundargs *args = rqstp->rq_argp;
4448
4449 if (args->ops != args->iops) {
4450 kfree(args->ops);
4451 args->ops = args->iops;
4452 }
4453 kfree(args->tmpp);
4454 args->tmpp = NULL;
4455 while (args->to_free) {
4456 struct svcxdr_tmpbuf *tb = args->to_free;
4457 args->to_free = tb->next;
4458 kfree(tb);
4459 }
4460 return 1;
4461 }
4462
4463 int
4464 nfs4svc_decode_compoundargs(struct svc_rqst *rqstp, __be32 *p, struct nfsd4_compoundargs *args)
4465 {
4466 if (rqstp->rq_arg.head[0].iov_len % 4) {
4467 /* client is nuts */
4468 dprintk("%s: compound not properly padded! (peeraddr=%pISc xid=0x%x)",
4469 __func__, svc_addr(rqstp), be32_to_cpu(rqstp->rq_xid));
4470 return 0;
4471 }
4472 args->p = p;
4473 args->end = rqstp->rq_arg.head[0].iov_base + rqstp->rq_arg.head[0].iov_len;
4474 args->pagelist = rqstp->rq_arg.pages;
4475 args->pagelen = rqstp->rq_arg.page_len;
4476 args->tmpp = NULL;
4477 args->to_free = NULL;
4478 args->ops = args->iops;
4479 args->rqstp = rqstp;
4480
4481 return !nfsd4_decode_compound(args);
4482 }
4483
4484 int
4485 nfs4svc_encode_compoundres(struct svc_rqst *rqstp, __be32 *p, struct nfsd4_compoundres *resp)
4486 {
4487 /*
4488 * All that remains is to write the tag and operation count...
4489 */
4490 struct xdr_buf *buf = resp->xdr.buf;
4491
4492 WARN_ON_ONCE(buf->len != buf->head[0].iov_len + buf->page_len +
4493 buf->tail[0].iov_len);
4494
4495 rqstp->rq_next_page = resp->xdr.page_ptr + 1;
4496
4497 p = resp->tagp;
4498 *p++ = htonl(resp->taglen);
4499 memcpy(p, resp->tag, resp->taglen);
4500 p += XDR_QUADLEN(resp->taglen);
4501 *p++ = htonl(resp->opcnt);
4502
4503 nfsd4_sequence_done(resp);
4504 return 1;
4505 }
4506
4507 /*
4508 * Local variables:
4509 * c-basic-offset: 8
4510 * End:
4511 */
Linux with added FPC-III support