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MAINTAINERS: Add phy-miphy28lp.c and phy-miphy365x.c to ARCH/STI architecture
[deliverable/linux.git] / fs / nfsd / nfs4xdr.c
1 /*
2 * Server-side XDR for NFSv4
3 *
4 * Copyright (c) 2002 The Regents of the University of Michigan.
5 * All rights reserved.
6 *
7 * Kendrick Smith <kmsmith@umich.edu>
8 * Andy Adamson <andros@umich.edu>
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 *
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in the
18 * documentation and/or other materials provided with the distribution.
19 * 3. Neither the name of the University nor the names of its
20 * contributors may be used to endorse or promote products derived
21 * from this software without specific prior written permission.
22 *
23 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
24 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
25 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
26 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
28 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
29 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
30 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
31 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
32 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
33 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
34 */
35
36 #include <linux/slab.h>
37 #include <linux/namei.h>
38 #include <linux/statfs.h>
39 #include <linux/utsname.h>
40 #include <linux/pagemap.h>
41 #include <linux/sunrpc/svcauth_gss.h>
42
43 #include "idmap.h"
44 #include "acl.h"
45 #include "xdr4.h"
46 #include "vfs.h"
47 #include "state.h"
48 #include "cache.h"
49 #include "netns.h"
50 #include "pnfs.h"
51
52 #ifdef CONFIG_NFSD_V4_SECURITY_LABEL
53 #include <linux/security.h>
54 #endif
55
56
57 #define NFSDDBG_FACILITY NFSDDBG_XDR
58
59 /*
60 * As per referral draft, the fsid for a referral MUST be different from the fsid of the containing
61 * directory in order to indicate to the client that a filesystem boundary is present
62 * We use a fixed fsid for a referral
63 */
64 #define NFS4_REFERRAL_FSID_MAJOR 0x8000000ULL
65 #define NFS4_REFERRAL_FSID_MINOR 0x8000000ULL
66
67 static __be32
68 check_filename(char *str, int len)
69 {
70 int i;
71
72 if (len == 0)
73 return nfserr_inval;
74 if (isdotent(str, len))
75 return nfserr_badname;
76 for (i = 0; i < len; i++)
77 if (str[i] == '/')
78 return nfserr_badname;
79 return 0;
80 }
81
82 #define DECODE_HEAD \
83 __be32 *p; \
84 __be32 status
85 #define DECODE_TAIL \
86 status = 0; \
87 out: \
88 return status; \
89 xdr_error: \
90 dprintk("NFSD: xdr error (%s:%d)\n", \
91 __FILE__, __LINE__); \
92 status = nfserr_bad_xdr; \
93 goto out
94
95 #define READMEM(x,nbytes) do { \
96 x = (char *)p; \
97 p += XDR_QUADLEN(nbytes); \
98 } while (0)
99 #define SAVEMEM(x,nbytes) do { \
100 if (!(x = (p==argp->tmp || p == argp->tmpp) ? \
101 savemem(argp, p, nbytes) : \
102 (char *)p)) { \
103 dprintk("NFSD: xdr error (%s:%d)\n", \
104 __FILE__, __LINE__); \
105 goto xdr_error; \
106 } \
107 p += XDR_QUADLEN(nbytes); \
108 } while (0)
109 #define COPYMEM(x,nbytes) do { \
110 memcpy((x), p, nbytes); \
111 p += XDR_QUADLEN(nbytes); \
112 } while (0)
113
114 /* READ_BUF, read_buf(): nbytes must be <= PAGE_SIZE */
115 #define READ_BUF(nbytes) do { \
116 if (nbytes <= (u32)((char *)argp->end - (char *)argp->p)) { \
117 p = argp->p; \
118 argp->p += XDR_QUADLEN(nbytes); \
119 } else if (!(p = read_buf(argp, nbytes))) { \
120 dprintk("NFSD: xdr error (%s:%d)\n", \
121 __FILE__, __LINE__); \
122 goto xdr_error; \
123 } \
124 } while (0)
125
126 static void next_decode_page(struct nfsd4_compoundargs *argp)
127 {
128 argp->p = page_address(argp->pagelist[0]);
129 argp->pagelist++;
130 if (argp->pagelen < PAGE_SIZE) {
131 argp->end = argp->p + (argp->pagelen>>2);
132 argp->pagelen = 0;
133 } else {
134 argp->end = argp->p + (PAGE_SIZE>>2);
135 argp->pagelen -= PAGE_SIZE;
136 }
137 }
138
139 static __be32 *read_buf(struct nfsd4_compoundargs *argp, u32 nbytes)
140 {
141 /* We want more bytes than seem to be available.
142 * Maybe we need a new page, maybe we have just run out
143 */
144 unsigned int avail = (char *)argp->end - (char *)argp->p;
145 __be32 *p;
146 if (avail + argp->pagelen < nbytes)
147 return NULL;
148 if (avail + PAGE_SIZE < nbytes) /* need more than a page !! */
149 return NULL;
150 /* ok, we can do it with the current plus the next page */
151 if (nbytes <= sizeof(argp->tmp))
152 p = argp->tmp;
153 else {
154 kfree(argp->tmpp);
155 p = argp->tmpp = kmalloc(nbytes, GFP_KERNEL);
156 if (!p)
157 return NULL;
158
159 }
160 /*
161 * The following memcpy is safe because read_buf is always
162 * called with nbytes > avail, and the two cases above both
163 * guarantee p points to at least nbytes bytes.
164 */
165 memcpy(p, argp->p, avail);
166 next_decode_page(argp);
167 memcpy(((char*)p)+avail, argp->p, (nbytes - avail));
168 argp->p += XDR_QUADLEN(nbytes - avail);
169 return p;
170 }
171
172 static int zero_clientid(clientid_t *clid)
173 {
174 return (clid->cl_boot == 0) && (clid->cl_id == 0);
175 }
176
177 /**
178 * svcxdr_tmpalloc - allocate memory to be freed after compound processing
179 * @argp: NFSv4 compound argument structure
180 * @p: pointer to be freed (with kfree())
181 *
182 * Marks @p to be freed when processing the compound operation
183 * described in @argp finishes.
184 */
185 static void *
186 svcxdr_tmpalloc(struct nfsd4_compoundargs *argp, u32 len)
187 {
188 struct svcxdr_tmpbuf *tb;
189
190 tb = kmalloc(sizeof(*tb) + len, GFP_KERNEL);
191 if (!tb)
192 return NULL;
193 tb->next = argp->to_free;
194 argp->to_free = tb;
195 return tb->buf;
196 }
197
198 /*
199 * For xdr strings that need to be passed to other kernel api's
200 * as null-terminated strings.
201 *
202 * Note null-terminating in place usually isn't safe since the
203 * buffer might end on a page boundary.
204 */
205 static char *
206 svcxdr_dupstr(struct nfsd4_compoundargs *argp, void *buf, u32 len)
207 {
208 char *p = svcxdr_tmpalloc(argp, len + 1);
209
210 if (!p)
211 return NULL;
212 memcpy(p, buf, len);
213 p[len] = '\0';
214 return p;
215 }
216
217 /**
218 * savemem - duplicate a chunk of memory for later processing
219 * @argp: NFSv4 compound argument structure to be freed with
220 * @p: pointer to be duplicated
221 * @nbytes: length to be duplicated
222 *
223 * Returns a pointer to a copy of @nbytes bytes of memory at @p
224 * that are preserved until processing of the NFSv4 compound
225 * operation described by @argp finishes.
226 */
227 static char *savemem(struct nfsd4_compoundargs *argp, __be32 *p, int nbytes)
228 {
229 void *ret;
230
231 ret = svcxdr_tmpalloc(argp, nbytes);
232 if (!ret)
233 return NULL;
234 memcpy(ret, p, nbytes);
235 return ret;
236 }
237
238 /*
239 * We require the high 32 bits of 'seconds' to be 0, and
240 * we ignore all 32 bits of 'nseconds'.
241 */
242 static __be32
243 nfsd4_decode_time(struct nfsd4_compoundargs *argp, struct timespec *tv)
244 {
245 DECODE_HEAD;
246 u64 sec;
247
248 READ_BUF(12);
249 p = xdr_decode_hyper(p, &sec);
250 tv->tv_sec = sec;
251 tv->tv_nsec = be32_to_cpup(p++);
252 if (tv->tv_nsec >= (u32)1000000000)
253 return nfserr_inval;
254
255 DECODE_TAIL;
256 }
257
258 static __be32
259 nfsd4_decode_bitmap(struct nfsd4_compoundargs *argp, u32 *bmval)
260 {
261 u32 bmlen;
262 DECODE_HEAD;
263
264 bmval[0] = 0;
265 bmval[1] = 0;
266 bmval[2] = 0;
267
268 READ_BUF(4);
269 bmlen = be32_to_cpup(p++);
270 if (bmlen > 1000)
271 goto xdr_error;
272
273 READ_BUF(bmlen << 2);
274 if (bmlen > 0)
275 bmval[0] = be32_to_cpup(p++);
276 if (bmlen > 1)
277 bmval[1] = be32_to_cpup(p++);
278 if (bmlen > 2)
279 bmval[2] = be32_to_cpup(p++);
280
281 DECODE_TAIL;
282 }
283
284 static __be32
285 nfsd4_decode_fattr(struct nfsd4_compoundargs *argp, u32 *bmval,
286 struct iattr *iattr, struct nfs4_acl **acl,
287 struct xdr_netobj *label)
288 {
289 int expected_len, len = 0;
290 u32 dummy32;
291 char *buf;
292
293 DECODE_HEAD;
294 iattr->ia_valid = 0;
295 if ((status = nfsd4_decode_bitmap(argp, bmval)))
296 return status;
297
298 READ_BUF(4);
299 expected_len = be32_to_cpup(p++);
300
301 if (bmval[0] & FATTR4_WORD0_SIZE) {
302 READ_BUF(8);
303 len += 8;
304 p = xdr_decode_hyper(p, &iattr->ia_size);
305 iattr->ia_valid |= ATTR_SIZE;
306 }
307 if (bmval[0] & FATTR4_WORD0_ACL) {
308 u32 nace;
309 struct nfs4_ace *ace;
310
311 READ_BUF(4); len += 4;
312 nace = be32_to_cpup(p++);
313
314 if (nace > NFS4_ACL_MAX)
315 return nfserr_fbig;
316
317 *acl = svcxdr_tmpalloc(argp, nfs4_acl_bytes(nace));
318 if (*acl == NULL)
319 return nfserr_jukebox;
320
321 (*acl)->naces = nace;
322 for (ace = (*acl)->aces; ace < (*acl)->aces + nace; ace++) {
323 READ_BUF(16); len += 16;
324 ace->type = be32_to_cpup(p++);
325 ace->flag = be32_to_cpup(p++);
326 ace->access_mask = be32_to_cpup(p++);
327 dummy32 = be32_to_cpup(p++);
328 READ_BUF(dummy32);
329 len += XDR_QUADLEN(dummy32) << 2;
330 READMEM(buf, dummy32);
331 ace->whotype = nfs4_acl_get_whotype(buf, dummy32);
332 status = nfs_ok;
333 if (ace->whotype != NFS4_ACL_WHO_NAMED)
334 ;
335 else if (ace->flag & NFS4_ACE_IDENTIFIER_GROUP)
336 status = nfsd_map_name_to_gid(argp->rqstp,
337 buf, dummy32, &ace->who_gid);
338 else
339 status = nfsd_map_name_to_uid(argp->rqstp,
340 buf, dummy32, &ace->who_uid);
341 if (status)
342 return status;
343 }
344 } else
345 *acl = NULL;
346 if (bmval[1] & FATTR4_WORD1_MODE) {
347 READ_BUF(4);
348 len += 4;
349 iattr->ia_mode = be32_to_cpup(p++);
350 iattr->ia_mode &= (S_IFMT | S_IALLUGO);
351 iattr->ia_valid |= ATTR_MODE;
352 }
353 if (bmval[1] & FATTR4_WORD1_OWNER) {
354 READ_BUF(4);
355 len += 4;
356 dummy32 = be32_to_cpup(p++);
357 READ_BUF(dummy32);
358 len += (XDR_QUADLEN(dummy32) << 2);
359 READMEM(buf, dummy32);
360 if ((status = nfsd_map_name_to_uid(argp->rqstp, buf, dummy32, &iattr->ia_uid)))
361 return status;
362 iattr->ia_valid |= ATTR_UID;
363 }
364 if (bmval[1] & FATTR4_WORD1_OWNER_GROUP) {
365 READ_BUF(4);
366 len += 4;
367 dummy32 = be32_to_cpup(p++);
368 READ_BUF(dummy32);
369 len += (XDR_QUADLEN(dummy32) << 2);
370 READMEM(buf, dummy32);
371 if ((status = nfsd_map_name_to_gid(argp->rqstp, buf, dummy32, &iattr->ia_gid)))
372 return status;
373 iattr->ia_valid |= ATTR_GID;
374 }
375 if (bmval[1] & FATTR4_WORD1_TIME_ACCESS_SET) {
376 READ_BUF(4);
377 len += 4;
378 dummy32 = be32_to_cpup(p++);
379 switch (dummy32) {
380 case NFS4_SET_TO_CLIENT_TIME:
381 len += 12;
382 status = nfsd4_decode_time(argp, &iattr->ia_atime);
383 if (status)
384 return status;
385 iattr->ia_valid |= (ATTR_ATIME | ATTR_ATIME_SET);
386 break;
387 case NFS4_SET_TO_SERVER_TIME:
388 iattr->ia_valid |= ATTR_ATIME;
389 break;
390 default:
391 goto xdr_error;
392 }
393 }
394 if (bmval[1] & FATTR4_WORD1_TIME_MODIFY_SET) {
395 READ_BUF(4);
396 len += 4;
397 dummy32 = be32_to_cpup(p++);
398 switch (dummy32) {
399 case NFS4_SET_TO_CLIENT_TIME:
400 len += 12;
401 status = nfsd4_decode_time(argp, &iattr->ia_mtime);
402 if (status)
403 return status;
404 iattr->ia_valid |= (ATTR_MTIME | ATTR_MTIME_SET);
405 break;
406 case NFS4_SET_TO_SERVER_TIME:
407 iattr->ia_valid |= ATTR_MTIME;
408 break;
409 default:
410 goto xdr_error;
411 }
412 }
413
414 label->len = 0;
415 #ifdef CONFIG_NFSD_V4_SECURITY_LABEL
416 if (bmval[2] & FATTR4_WORD2_SECURITY_LABEL) {
417 READ_BUF(4);
418 len += 4;
419 dummy32 = be32_to_cpup(p++); /* lfs: we don't use it */
420 READ_BUF(4);
421 len += 4;
422 dummy32 = be32_to_cpup(p++); /* pi: we don't use it either */
423 READ_BUF(4);
424 len += 4;
425 dummy32 = be32_to_cpup(p++);
426 READ_BUF(dummy32);
427 if (dummy32 > NFSD4_MAX_SEC_LABEL_LEN)
428 return nfserr_badlabel;
429 len += (XDR_QUADLEN(dummy32) << 2);
430 READMEM(buf, dummy32);
431 label->len = dummy32;
432 label->data = svcxdr_dupstr(argp, buf, dummy32);
433 if (!label->data)
434 return nfserr_jukebox;
435 }
436 #endif
437
438 if (bmval[0] & ~NFSD_WRITEABLE_ATTRS_WORD0
439 || bmval[1] & ~NFSD_WRITEABLE_ATTRS_WORD1
440 || bmval[2] & ~NFSD_WRITEABLE_ATTRS_WORD2)
441 READ_BUF(expected_len - len);
442 else if (len != expected_len)
443 goto xdr_error;
444
445 DECODE_TAIL;
446 }
447
448 static __be32
449 nfsd4_decode_stateid(struct nfsd4_compoundargs *argp, stateid_t *sid)
450 {
451 DECODE_HEAD;
452
453 READ_BUF(sizeof(stateid_t));
454 sid->si_generation = be32_to_cpup(p++);
455 COPYMEM(&sid->si_opaque, sizeof(stateid_opaque_t));
456
457 DECODE_TAIL;
458 }
459
460 static __be32
461 nfsd4_decode_access(struct nfsd4_compoundargs *argp, struct nfsd4_access *access)
462 {
463 DECODE_HEAD;
464
465 READ_BUF(4);
466 access->ac_req_access = be32_to_cpup(p++);
467
468 DECODE_TAIL;
469 }
470
471 static __be32 nfsd4_decode_cb_sec(struct nfsd4_compoundargs *argp, struct nfsd4_cb_sec *cbs)
472 {
473 DECODE_HEAD;
474 u32 dummy, uid, gid;
475 char *machine_name;
476 int i;
477 int nr_secflavs;
478
479 /* callback_sec_params4 */
480 READ_BUF(4);
481 nr_secflavs = be32_to_cpup(p++);
482 if (nr_secflavs)
483 cbs->flavor = (u32)(-1);
484 else
485 /* Is this legal? Be generous, take it to mean AUTH_NONE: */
486 cbs->flavor = 0;
487 for (i = 0; i < nr_secflavs; ++i) {
488 READ_BUF(4);
489 dummy = be32_to_cpup(p++);
490 switch (dummy) {
491 case RPC_AUTH_NULL:
492 /* Nothing to read */
493 if (cbs->flavor == (u32)(-1))
494 cbs->flavor = RPC_AUTH_NULL;
495 break;
496 case RPC_AUTH_UNIX:
497 READ_BUF(8);
498 /* stamp */
499 dummy = be32_to_cpup(p++);
500
501 /* machine name */
502 dummy = be32_to_cpup(p++);
503 READ_BUF(dummy);
504 SAVEMEM(machine_name, dummy);
505
506 /* uid, gid */
507 READ_BUF(8);
508 uid = be32_to_cpup(p++);
509 gid = be32_to_cpup(p++);
510
511 /* more gids */
512 READ_BUF(4);
513 dummy = be32_to_cpup(p++);
514 READ_BUF(dummy * 4);
515 if (cbs->flavor == (u32)(-1)) {
516 kuid_t kuid = make_kuid(&init_user_ns, uid);
517 kgid_t kgid = make_kgid(&init_user_ns, gid);
518 if (uid_valid(kuid) && gid_valid(kgid)) {
519 cbs->uid = kuid;
520 cbs->gid = kgid;
521 cbs->flavor = RPC_AUTH_UNIX;
522 } else {
523 dprintk("RPC_AUTH_UNIX with invalid"
524 "uid or gid ignoring!\n");
525 }
526 }
527 break;
528 case RPC_AUTH_GSS:
529 dprintk("RPC_AUTH_GSS callback secflavor "
530 "not supported!\n");
531 READ_BUF(8);
532 /* gcbp_service */
533 dummy = be32_to_cpup(p++);
534 /* gcbp_handle_from_server */
535 dummy = be32_to_cpup(p++);
536 READ_BUF(dummy);
537 p += XDR_QUADLEN(dummy);
538 /* gcbp_handle_from_client */
539 READ_BUF(4);
540 dummy = be32_to_cpup(p++);
541 READ_BUF(dummy);
542 break;
543 default:
544 dprintk("Illegal callback secflavor\n");
545 return nfserr_inval;
546 }
547 }
548 DECODE_TAIL;
549 }
550
551 static __be32 nfsd4_decode_backchannel_ctl(struct nfsd4_compoundargs *argp, struct nfsd4_backchannel_ctl *bc)
552 {
553 DECODE_HEAD;
554
555 READ_BUF(4);
556 bc->bc_cb_program = be32_to_cpup(p++);
557 nfsd4_decode_cb_sec(argp, &bc->bc_cb_sec);
558
559 DECODE_TAIL;
560 }
561
562 static __be32 nfsd4_decode_bind_conn_to_session(struct nfsd4_compoundargs *argp, struct nfsd4_bind_conn_to_session *bcts)
563 {
564 DECODE_HEAD;
565
566 READ_BUF(NFS4_MAX_SESSIONID_LEN + 8);
567 COPYMEM(bcts->sessionid.data, NFS4_MAX_SESSIONID_LEN);
568 bcts->dir = be32_to_cpup(p++);
569 /* XXX: skipping ctsa_use_conn_in_rdma_mode. Perhaps Tom Tucker
570 * could help us figure out we should be using it. */
571 DECODE_TAIL;
572 }
573
574 static __be32
575 nfsd4_decode_close(struct nfsd4_compoundargs *argp, struct nfsd4_close *close)
576 {
577 DECODE_HEAD;
578
579 READ_BUF(4);
580 close->cl_seqid = be32_to_cpup(p++);
581 return nfsd4_decode_stateid(argp, &close->cl_stateid);
582
583 DECODE_TAIL;
584 }
585
586
587 static __be32
588 nfsd4_decode_commit(struct nfsd4_compoundargs *argp, struct nfsd4_commit *commit)
589 {
590 DECODE_HEAD;
591
592 READ_BUF(12);
593 p = xdr_decode_hyper(p, &commit->co_offset);
594 commit->co_count = be32_to_cpup(p++);
595
596 DECODE_TAIL;
597 }
598
599 static __be32
600 nfsd4_decode_create(struct nfsd4_compoundargs *argp, struct nfsd4_create *create)
601 {
602 DECODE_HEAD;
603
604 READ_BUF(4);
605 create->cr_type = be32_to_cpup(p++);
606 switch (create->cr_type) {
607 case NF4LNK:
608 READ_BUF(4);
609 create->cr_datalen = be32_to_cpup(p++);
610 READ_BUF(create->cr_datalen);
611 create->cr_data = svcxdr_dupstr(argp, p, create->cr_datalen);
612 if (!create->cr_data)
613 return nfserr_jukebox;
614 break;
615 case NF4BLK:
616 case NF4CHR:
617 READ_BUF(8);
618 create->cr_specdata1 = be32_to_cpup(p++);
619 create->cr_specdata2 = be32_to_cpup(p++);
620 break;
621 case NF4SOCK:
622 case NF4FIFO:
623 case NF4DIR:
624 default:
625 break;
626 }
627
628 READ_BUF(4);
629 create->cr_namelen = be32_to_cpup(p++);
630 READ_BUF(create->cr_namelen);
631 SAVEMEM(create->cr_name, create->cr_namelen);
632 if ((status = check_filename(create->cr_name, create->cr_namelen)))
633 return status;
634
635 status = nfsd4_decode_fattr(argp, create->cr_bmval, &create->cr_iattr,
636 &create->cr_acl, &create->cr_label);
637 if (status)
638 goto out;
639
640 DECODE_TAIL;
641 }
642
643 static inline __be32
644 nfsd4_decode_delegreturn(struct nfsd4_compoundargs *argp, struct nfsd4_delegreturn *dr)
645 {
646 return nfsd4_decode_stateid(argp, &dr->dr_stateid);
647 }
648
649 static inline __be32
650 nfsd4_decode_getattr(struct nfsd4_compoundargs *argp, struct nfsd4_getattr *getattr)
651 {
652 return nfsd4_decode_bitmap(argp, getattr->ga_bmval);
653 }
654
655 static __be32
656 nfsd4_decode_link(struct nfsd4_compoundargs *argp, struct nfsd4_link *link)
657 {
658 DECODE_HEAD;
659
660 READ_BUF(4);
661 link->li_namelen = be32_to_cpup(p++);
662 READ_BUF(link->li_namelen);
663 SAVEMEM(link->li_name, link->li_namelen);
664 if ((status = check_filename(link->li_name, link->li_namelen)))
665 return status;
666
667 DECODE_TAIL;
668 }
669
670 static __be32
671 nfsd4_decode_lock(struct nfsd4_compoundargs *argp, struct nfsd4_lock *lock)
672 {
673 DECODE_HEAD;
674
675 /*
676 * type, reclaim(boolean), offset, length, new_lock_owner(boolean)
677 */
678 READ_BUF(28);
679 lock->lk_type = be32_to_cpup(p++);
680 if ((lock->lk_type < NFS4_READ_LT) || (lock->lk_type > NFS4_WRITEW_LT))
681 goto xdr_error;
682 lock->lk_reclaim = be32_to_cpup(p++);
683 p = xdr_decode_hyper(p, &lock->lk_offset);
684 p = xdr_decode_hyper(p, &lock->lk_length);
685 lock->lk_is_new = be32_to_cpup(p++);
686
687 if (lock->lk_is_new) {
688 READ_BUF(4);
689 lock->lk_new_open_seqid = be32_to_cpup(p++);
690 status = nfsd4_decode_stateid(argp, &lock->lk_new_open_stateid);
691 if (status)
692 return status;
693 READ_BUF(8 + sizeof(clientid_t));
694 lock->lk_new_lock_seqid = be32_to_cpup(p++);
695 COPYMEM(&lock->lk_new_clientid, sizeof(clientid_t));
696 lock->lk_new_owner.len = be32_to_cpup(p++);
697 READ_BUF(lock->lk_new_owner.len);
698 READMEM(lock->lk_new_owner.data, lock->lk_new_owner.len);
699 } else {
700 status = nfsd4_decode_stateid(argp, &lock->lk_old_lock_stateid);
701 if (status)
702 return status;
703 READ_BUF(4);
704 lock->lk_old_lock_seqid = be32_to_cpup(p++);
705 }
706
707 DECODE_TAIL;
708 }
709
710 static __be32
711 nfsd4_decode_lockt(struct nfsd4_compoundargs *argp, struct nfsd4_lockt *lockt)
712 {
713 DECODE_HEAD;
714
715 READ_BUF(32);
716 lockt->lt_type = be32_to_cpup(p++);
717 if((lockt->lt_type < NFS4_READ_LT) || (lockt->lt_type > NFS4_WRITEW_LT))
718 goto xdr_error;
719 p = xdr_decode_hyper(p, &lockt->lt_offset);
720 p = xdr_decode_hyper(p, &lockt->lt_length);
721 COPYMEM(&lockt->lt_clientid, 8);
722 lockt->lt_owner.len = be32_to_cpup(p++);
723 READ_BUF(lockt->lt_owner.len);
724 READMEM(lockt->lt_owner.data, lockt->lt_owner.len);
725
726 DECODE_TAIL;
727 }
728
729 static __be32
730 nfsd4_decode_locku(struct nfsd4_compoundargs *argp, struct nfsd4_locku *locku)
731 {
732 DECODE_HEAD;
733
734 READ_BUF(8);
735 locku->lu_type = be32_to_cpup(p++);
736 if ((locku->lu_type < NFS4_READ_LT) || (locku->lu_type > NFS4_WRITEW_LT))
737 goto xdr_error;
738 locku->lu_seqid = be32_to_cpup(p++);
739 status = nfsd4_decode_stateid(argp, &locku->lu_stateid);
740 if (status)
741 return status;
742 READ_BUF(16);
743 p = xdr_decode_hyper(p, &locku->lu_offset);
744 p = xdr_decode_hyper(p, &locku->lu_length);
745
746 DECODE_TAIL;
747 }
748
749 static __be32
750 nfsd4_decode_lookup(struct nfsd4_compoundargs *argp, struct nfsd4_lookup *lookup)
751 {
752 DECODE_HEAD;
753
754 READ_BUF(4);
755 lookup->lo_len = be32_to_cpup(p++);
756 READ_BUF(lookup->lo_len);
757 SAVEMEM(lookup->lo_name, lookup->lo_len);
758 if ((status = check_filename(lookup->lo_name, lookup->lo_len)))
759 return status;
760
761 DECODE_TAIL;
762 }
763
764 static __be32 nfsd4_decode_share_access(struct nfsd4_compoundargs *argp, u32 *share_access, u32 *deleg_want, u32 *deleg_when)
765 {
766 __be32 *p;
767 u32 w;
768
769 READ_BUF(4);
770 w = be32_to_cpup(p++);
771 *share_access = w & NFS4_SHARE_ACCESS_MASK;
772 *deleg_want = w & NFS4_SHARE_WANT_MASK;
773 if (deleg_when)
774 *deleg_when = w & NFS4_SHARE_WHEN_MASK;
775
776 switch (w & NFS4_SHARE_ACCESS_MASK) {
777 case NFS4_SHARE_ACCESS_READ:
778 case NFS4_SHARE_ACCESS_WRITE:
779 case NFS4_SHARE_ACCESS_BOTH:
780 break;
781 default:
782 return nfserr_bad_xdr;
783 }
784 w &= ~NFS4_SHARE_ACCESS_MASK;
785 if (!w)
786 return nfs_ok;
787 if (!argp->minorversion)
788 return nfserr_bad_xdr;
789 switch (w & NFS4_SHARE_WANT_MASK) {
790 case NFS4_SHARE_WANT_NO_PREFERENCE:
791 case NFS4_SHARE_WANT_READ_DELEG:
792 case NFS4_SHARE_WANT_WRITE_DELEG:
793 case NFS4_SHARE_WANT_ANY_DELEG:
794 case NFS4_SHARE_WANT_NO_DELEG:
795 case NFS4_SHARE_WANT_CANCEL:
796 break;
797 default:
798 return nfserr_bad_xdr;
799 }
800 w &= ~NFS4_SHARE_WANT_MASK;
801 if (!w)
802 return nfs_ok;
803
804 if (!deleg_when) /* open_downgrade */
805 return nfserr_inval;
806 switch (w) {
807 case NFS4_SHARE_SIGNAL_DELEG_WHEN_RESRC_AVAIL:
808 case NFS4_SHARE_PUSH_DELEG_WHEN_UNCONTENDED:
809 case (NFS4_SHARE_SIGNAL_DELEG_WHEN_RESRC_AVAIL |
810 NFS4_SHARE_PUSH_DELEG_WHEN_UNCONTENDED):
811 return nfs_ok;
812 }
813 xdr_error:
814 return nfserr_bad_xdr;
815 }
816
817 static __be32 nfsd4_decode_share_deny(struct nfsd4_compoundargs *argp, u32 *x)
818 {
819 __be32 *p;
820
821 READ_BUF(4);
822 *x = be32_to_cpup(p++);
823 /* Note: unlinke access bits, deny bits may be zero. */
824 if (*x & ~NFS4_SHARE_DENY_BOTH)
825 return nfserr_bad_xdr;
826 return nfs_ok;
827 xdr_error:
828 return nfserr_bad_xdr;
829 }
830
831 static __be32 nfsd4_decode_opaque(struct nfsd4_compoundargs *argp, struct xdr_netobj *o)
832 {
833 __be32 *p;
834
835 READ_BUF(4);
836 o->len = be32_to_cpup(p++);
837
838 if (o->len == 0 || o->len > NFS4_OPAQUE_LIMIT)
839 return nfserr_bad_xdr;
840
841 READ_BUF(o->len);
842 SAVEMEM(o->data, o->len);
843 return nfs_ok;
844 xdr_error:
845 return nfserr_bad_xdr;
846 }
847
848 static __be32
849 nfsd4_decode_open(struct nfsd4_compoundargs *argp, struct nfsd4_open *open)
850 {
851 DECODE_HEAD;
852 u32 dummy;
853
854 memset(open->op_bmval, 0, sizeof(open->op_bmval));
855 open->op_iattr.ia_valid = 0;
856 open->op_openowner = NULL;
857
858 open->op_xdr_error = 0;
859 /* seqid, share_access, share_deny, clientid, ownerlen */
860 READ_BUF(4);
861 open->op_seqid = be32_to_cpup(p++);
862 /* decode, yet ignore deleg_when until supported */
863 status = nfsd4_decode_share_access(argp, &open->op_share_access,
864 &open->op_deleg_want, &dummy);
865 if (status)
866 goto xdr_error;
867 status = nfsd4_decode_share_deny(argp, &open->op_share_deny);
868 if (status)
869 goto xdr_error;
870 READ_BUF(sizeof(clientid_t));
871 COPYMEM(&open->op_clientid, sizeof(clientid_t));
872 status = nfsd4_decode_opaque(argp, &open->op_owner);
873 if (status)
874 goto xdr_error;
875 READ_BUF(4);
876 open->op_create = be32_to_cpup(p++);
877 switch (open->op_create) {
878 case NFS4_OPEN_NOCREATE:
879 break;
880 case NFS4_OPEN_CREATE:
881 READ_BUF(4);
882 open->op_createmode = be32_to_cpup(p++);
883 switch (open->op_createmode) {
884 case NFS4_CREATE_UNCHECKED:
885 case NFS4_CREATE_GUARDED:
886 status = nfsd4_decode_fattr(argp, open->op_bmval,
887 &open->op_iattr, &open->op_acl, &open->op_label);
888 if (status)
889 goto out;
890 break;
891 case NFS4_CREATE_EXCLUSIVE:
892 READ_BUF(NFS4_VERIFIER_SIZE);
893 COPYMEM(open->op_verf.data, NFS4_VERIFIER_SIZE);
894 break;
895 case NFS4_CREATE_EXCLUSIVE4_1:
896 if (argp->minorversion < 1)
897 goto xdr_error;
898 READ_BUF(NFS4_VERIFIER_SIZE);
899 COPYMEM(open->op_verf.data, NFS4_VERIFIER_SIZE);
900 status = nfsd4_decode_fattr(argp, open->op_bmval,
901 &open->op_iattr, &open->op_acl, &open->op_label);
902 if (status)
903 goto out;
904 break;
905 default:
906 goto xdr_error;
907 }
908 break;
909 default:
910 goto xdr_error;
911 }
912
913 /* open_claim */
914 READ_BUF(4);
915 open->op_claim_type = be32_to_cpup(p++);
916 switch (open->op_claim_type) {
917 case NFS4_OPEN_CLAIM_NULL:
918 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
919 READ_BUF(4);
920 open->op_fname.len = be32_to_cpup(p++);
921 READ_BUF(open->op_fname.len);
922 SAVEMEM(open->op_fname.data, open->op_fname.len);
923 if ((status = check_filename(open->op_fname.data, open->op_fname.len)))
924 return status;
925 break;
926 case NFS4_OPEN_CLAIM_PREVIOUS:
927 READ_BUF(4);
928 open->op_delegate_type = be32_to_cpup(p++);
929 break;
930 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
931 status = nfsd4_decode_stateid(argp, &open->op_delegate_stateid);
932 if (status)
933 return status;
934 READ_BUF(4);
935 open->op_fname.len = be32_to_cpup(p++);
936 READ_BUF(open->op_fname.len);
937 SAVEMEM(open->op_fname.data, open->op_fname.len);
938 if ((status = check_filename(open->op_fname.data, open->op_fname.len)))
939 return status;
940 break;
941 case NFS4_OPEN_CLAIM_FH:
942 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
943 if (argp->minorversion < 1)
944 goto xdr_error;
945 /* void */
946 break;
947 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
948 if (argp->minorversion < 1)
949 goto xdr_error;
950 status = nfsd4_decode_stateid(argp, &open->op_delegate_stateid);
951 if (status)
952 return status;
953 break;
954 default:
955 goto xdr_error;
956 }
957
958 DECODE_TAIL;
959 }
960
961 static __be32
962 nfsd4_decode_open_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_open_confirm *open_conf)
963 {
964 DECODE_HEAD;
965
966 if (argp->minorversion >= 1)
967 return nfserr_notsupp;
968
969 status = nfsd4_decode_stateid(argp, &open_conf->oc_req_stateid);
970 if (status)
971 return status;
972 READ_BUF(4);
973 open_conf->oc_seqid = be32_to_cpup(p++);
974
975 DECODE_TAIL;
976 }
977
978 static __be32
979 nfsd4_decode_open_downgrade(struct nfsd4_compoundargs *argp, struct nfsd4_open_downgrade *open_down)
980 {
981 DECODE_HEAD;
982
983 status = nfsd4_decode_stateid(argp, &open_down->od_stateid);
984 if (status)
985 return status;
986 READ_BUF(4);
987 open_down->od_seqid = be32_to_cpup(p++);
988 status = nfsd4_decode_share_access(argp, &open_down->od_share_access,
989 &open_down->od_deleg_want, NULL);
990 if (status)
991 return status;
992 status = nfsd4_decode_share_deny(argp, &open_down->od_share_deny);
993 if (status)
994 return status;
995 DECODE_TAIL;
996 }
997
998 static __be32
999 nfsd4_decode_putfh(struct nfsd4_compoundargs *argp, struct nfsd4_putfh *putfh)
1000 {
1001 DECODE_HEAD;
1002
1003 READ_BUF(4);
1004 putfh->pf_fhlen = be32_to_cpup(p++);
1005 if (putfh->pf_fhlen > NFS4_FHSIZE)
1006 goto xdr_error;
1007 READ_BUF(putfh->pf_fhlen);
1008 SAVEMEM(putfh->pf_fhval, putfh->pf_fhlen);
1009
1010 DECODE_TAIL;
1011 }
1012
1013 static __be32
1014 nfsd4_decode_putpubfh(struct nfsd4_compoundargs *argp, void *p)
1015 {
1016 if (argp->minorversion == 0)
1017 return nfs_ok;
1018 return nfserr_notsupp;
1019 }
1020
1021 static __be32
1022 nfsd4_decode_read(struct nfsd4_compoundargs *argp, struct nfsd4_read *read)
1023 {
1024 DECODE_HEAD;
1025
1026 status = nfsd4_decode_stateid(argp, &read->rd_stateid);
1027 if (status)
1028 return status;
1029 READ_BUF(12);
1030 p = xdr_decode_hyper(p, &read->rd_offset);
1031 read->rd_length = be32_to_cpup(p++);
1032
1033 DECODE_TAIL;
1034 }
1035
1036 static __be32
1037 nfsd4_decode_readdir(struct nfsd4_compoundargs *argp, struct nfsd4_readdir *readdir)
1038 {
1039 DECODE_HEAD;
1040
1041 READ_BUF(24);
1042 p = xdr_decode_hyper(p, &readdir->rd_cookie);
1043 COPYMEM(readdir->rd_verf.data, sizeof(readdir->rd_verf.data));
1044 readdir->rd_dircount = be32_to_cpup(p++);
1045 readdir->rd_maxcount = be32_to_cpup(p++);
1046 if ((status = nfsd4_decode_bitmap(argp, readdir->rd_bmval)))
1047 goto out;
1048
1049 DECODE_TAIL;
1050 }
1051
1052 static __be32
1053 nfsd4_decode_remove(struct nfsd4_compoundargs *argp, struct nfsd4_remove *remove)
1054 {
1055 DECODE_HEAD;
1056
1057 READ_BUF(4);
1058 remove->rm_namelen = be32_to_cpup(p++);
1059 READ_BUF(remove->rm_namelen);
1060 SAVEMEM(remove->rm_name, remove->rm_namelen);
1061 if ((status = check_filename(remove->rm_name, remove->rm_namelen)))
1062 return status;
1063
1064 DECODE_TAIL;
1065 }
1066
1067 static __be32
1068 nfsd4_decode_rename(struct nfsd4_compoundargs *argp, struct nfsd4_rename *rename)
1069 {
1070 DECODE_HEAD;
1071
1072 READ_BUF(4);
1073 rename->rn_snamelen = be32_to_cpup(p++);
1074 READ_BUF(rename->rn_snamelen + 4);
1075 SAVEMEM(rename->rn_sname, rename->rn_snamelen);
1076 rename->rn_tnamelen = be32_to_cpup(p++);
1077 READ_BUF(rename->rn_tnamelen);
1078 SAVEMEM(rename->rn_tname, rename->rn_tnamelen);
1079 if ((status = check_filename(rename->rn_sname, rename->rn_snamelen)))
1080 return status;
1081 if ((status = check_filename(rename->rn_tname, rename->rn_tnamelen)))
1082 return status;
1083
1084 DECODE_TAIL;
1085 }
1086
1087 static __be32
1088 nfsd4_decode_renew(struct nfsd4_compoundargs *argp, clientid_t *clientid)
1089 {
1090 DECODE_HEAD;
1091
1092 if (argp->minorversion >= 1)
1093 return nfserr_notsupp;
1094
1095 READ_BUF(sizeof(clientid_t));
1096 COPYMEM(clientid, sizeof(clientid_t));
1097
1098 DECODE_TAIL;
1099 }
1100
1101 static __be32
1102 nfsd4_decode_secinfo(struct nfsd4_compoundargs *argp,
1103 struct nfsd4_secinfo *secinfo)
1104 {
1105 DECODE_HEAD;
1106
1107 READ_BUF(4);
1108 secinfo->si_namelen = be32_to_cpup(p++);
1109 READ_BUF(secinfo->si_namelen);
1110 SAVEMEM(secinfo->si_name, secinfo->si_namelen);
1111 status = check_filename(secinfo->si_name, secinfo->si_namelen);
1112 if (status)
1113 return status;
1114 DECODE_TAIL;
1115 }
1116
1117 static __be32
1118 nfsd4_decode_secinfo_no_name(struct nfsd4_compoundargs *argp,
1119 struct nfsd4_secinfo_no_name *sin)
1120 {
1121 DECODE_HEAD;
1122
1123 READ_BUF(4);
1124 sin->sin_style = be32_to_cpup(p++);
1125 DECODE_TAIL;
1126 }
1127
1128 static __be32
1129 nfsd4_decode_setattr(struct nfsd4_compoundargs *argp, struct nfsd4_setattr *setattr)
1130 {
1131 __be32 status;
1132
1133 status = nfsd4_decode_stateid(argp, &setattr->sa_stateid);
1134 if (status)
1135 return status;
1136 return nfsd4_decode_fattr(argp, setattr->sa_bmval, &setattr->sa_iattr,
1137 &setattr->sa_acl, &setattr->sa_label);
1138 }
1139
1140 static __be32
1141 nfsd4_decode_setclientid(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid *setclientid)
1142 {
1143 DECODE_HEAD;
1144
1145 if (argp->minorversion >= 1)
1146 return nfserr_notsupp;
1147
1148 READ_BUF(NFS4_VERIFIER_SIZE);
1149 COPYMEM(setclientid->se_verf.data, NFS4_VERIFIER_SIZE);
1150
1151 status = nfsd4_decode_opaque(argp, &setclientid->se_name);
1152 if (status)
1153 return nfserr_bad_xdr;
1154 READ_BUF(8);
1155 setclientid->se_callback_prog = be32_to_cpup(p++);
1156 setclientid->se_callback_netid_len = be32_to_cpup(p++);
1157
1158 READ_BUF(setclientid->se_callback_netid_len + 4);
1159 SAVEMEM(setclientid->se_callback_netid_val, setclientid->se_callback_netid_len);
1160 setclientid->se_callback_addr_len = be32_to_cpup(p++);
1161
1162 READ_BUF(setclientid->se_callback_addr_len + 4);
1163 SAVEMEM(setclientid->se_callback_addr_val, setclientid->se_callback_addr_len);
1164 setclientid->se_callback_ident = be32_to_cpup(p++);
1165
1166 DECODE_TAIL;
1167 }
1168
1169 static __be32
1170 nfsd4_decode_setclientid_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid_confirm *scd_c)
1171 {
1172 DECODE_HEAD;
1173
1174 if (argp->minorversion >= 1)
1175 return nfserr_notsupp;
1176
1177 READ_BUF(8 + NFS4_VERIFIER_SIZE);
1178 COPYMEM(&scd_c->sc_clientid, 8);
1179 COPYMEM(&scd_c->sc_confirm, NFS4_VERIFIER_SIZE);
1180
1181 DECODE_TAIL;
1182 }
1183
1184 /* Also used for NVERIFY */
1185 static __be32
1186 nfsd4_decode_verify(struct nfsd4_compoundargs *argp, struct nfsd4_verify *verify)
1187 {
1188 DECODE_HEAD;
1189
1190 if ((status = nfsd4_decode_bitmap(argp, verify->ve_bmval)))
1191 goto out;
1192
1193 /* For convenience's sake, we compare raw xdr'd attributes in
1194 * nfsd4_proc_verify */
1195
1196 READ_BUF(4);
1197 verify->ve_attrlen = be32_to_cpup(p++);
1198 READ_BUF(verify->ve_attrlen);
1199 SAVEMEM(verify->ve_attrval, verify->ve_attrlen);
1200
1201 DECODE_TAIL;
1202 }
1203
1204 static __be32
1205 nfsd4_decode_write(struct nfsd4_compoundargs *argp, struct nfsd4_write *write)
1206 {
1207 int avail;
1208 int len;
1209 DECODE_HEAD;
1210
1211 status = nfsd4_decode_stateid(argp, &write->wr_stateid);
1212 if (status)
1213 return status;
1214 READ_BUF(16);
1215 p = xdr_decode_hyper(p, &write->wr_offset);
1216 write->wr_stable_how = be32_to_cpup(p++);
1217 if (write->wr_stable_how > 2)
1218 goto xdr_error;
1219 write->wr_buflen = be32_to_cpup(p++);
1220
1221 /* Sorry .. no magic macros for this.. *
1222 * READ_BUF(write->wr_buflen);
1223 * SAVEMEM(write->wr_buf, write->wr_buflen);
1224 */
1225 avail = (char*)argp->end - (char*)argp->p;
1226 if (avail + argp->pagelen < write->wr_buflen) {
1227 dprintk("NFSD: xdr error (%s:%d)\n",
1228 __FILE__, __LINE__);
1229 goto xdr_error;
1230 }
1231 write->wr_head.iov_base = p;
1232 write->wr_head.iov_len = avail;
1233 write->wr_pagelist = argp->pagelist;
1234
1235 len = XDR_QUADLEN(write->wr_buflen) << 2;
1236 if (len >= avail) {
1237 int pages;
1238
1239 len -= avail;
1240
1241 pages = len >> PAGE_SHIFT;
1242 argp->pagelist += pages;
1243 argp->pagelen -= pages * PAGE_SIZE;
1244 len -= pages * PAGE_SIZE;
1245
1246 argp->p = (__be32 *)page_address(argp->pagelist[0]);
1247 argp->pagelist++;
1248 argp->end = argp->p + XDR_QUADLEN(PAGE_SIZE);
1249 }
1250 argp->p += XDR_QUADLEN(len);
1251
1252 DECODE_TAIL;
1253 }
1254
1255 static __be32
1256 nfsd4_decode_release_lockowner(struct nfsd4_compoundargs *argp, struct nfsd4_release_lockowner *rlockowner)
1257 {
1258 DECODE_HEAD;
1259
1260 if (argp->minorversion >= 1)
1261 return nfserr_notsupp;
1262
1263 READ_BUF(12);
1264 COPYMEM(&rlockowner->rl_clientid, sizeof(clientid_t));
1265 rlockowner->rl_owner.len = be32_to_cpup(p++);
1266 READ_BUF(rlockowner->rl_owner.len);
1267 READMEM(rlockowner->rl_owner.data, rlockowner->rl_owner.len);
1268
1269 if (argp->minorversion && !zero_clientid(&rlockowner->rl_clientid))
1270 return nfserr_inval;
1271 DECODE_TAIL;
1272 }
1273
1274 static __be32
1275 nfsd4_decode_exchange_id(struct nfsd4_compoundargs *argp,
1276 struct nfsd4_exchange_id *exid)
1277 {
1278 int dummy, tmp;
1279 DECODE_HEAD;
1280
1281 READ_BUF(NFS4_VERIFIER_SIZE);
1282 COPYMEM(exid->verifier.data, NFS4_VERIFIER_SIZE);
1283
1284 status = nfsd4_decode_opaque(argp, &exid->clname);
1285 if (status)
1286 return nfserr_bad_xdr;
1287
1288 READ_BUF(4);
1289 exid->flags = be32_to_cpup(p++);
1290
1291 /* Ignore state_protect4_a */
1292 READ_BUF(4);
1293 exid->spa_how = be32_to_cpup(p++);
1294 switch (exid->spa_how) {
1295 case SP4_NONE:
1296 break;
1297 case SP4_MACH_CRED:
1298 /* spo_must_enforce */
1299 READ_BUF(4);
1300 dummy = be32_to_cpup(p++);
1301 READ_BUF(dummy * 4);
1302 p += dummy;
1303
1304 /* spo_must_allow */
1305 READ_BUF(4);
1306 dummy = be32_to_cpup(p++);
1307 READ_BUF(dummy * 4);
1308 p += dummy;
1309 break;
1310 case SP4_SSV:
1311 /* ssp_ops */
1312 READ_BUF(4);
1313 dummy = be32_to_cpup(p++);
1314 READ_BUF(dummy * 4);
1315 p += dummy;
1316
1317 READ_BUF(4);
1318 dummy = be32_to_cpup(p++);
1319 READ_BUF(dummy * 4);
1320 p += dummy;
1321
1322 /* ssp_hash_algs<> */
1323 READ_BUF(4);
1324 tmp = be32_to_cpup(p++);
1325 while (tmp--) {
1326 READ_BUF(4);
1327 dummy = be32_to_cpup(p++);
1328 READ_BUF(dummy);
1329 p += XDR_QUADLEN(dummy);
1330 }
1331
1332 /* ssp_encr_algs<> */
1333 READ_BUF(4);
1334 tmp = be32_to_cpup(p++);
1335 while (tmp--) {
1336 READ_BUF(4);
1337 dummy = be32_to_cpup(p++);
1338 READ_BUF(dummy);
1339 p += XDR_QUADLEN(dummy);
1340 }
1341
1342 /* ssp_window and ssp_num_gss_handles */
1343 READ_BUF(8);
1344 dummy = be32_to_cpup(p++);
1345 dummy = be32_to_cpup(p++);
1346 break;
1347 default:
1348 goto xdr_error;
1349 }
1350
1351 /* Ignore Implementation ID */
1352 READ_BUF(4); /* nfs_impl_id4 array length */
1353 dummy = be32_to_cpup(p++);
1354
1355 if (dummy > 1)
1356 goto xdr_error;
1357
1358 if (dummy == 1) {
1359 /* nii_domain */
1360 READ_BUF(4);
1361 dummy = be32_to_cpup(p++);
1362 READ_BUF(dummy);
1363 p += XDR_QUADLEN(dummy);
1364
1365 /* nii_name */
1366 READ_BUF(4);
1367 dummy = be32_to_cpup(p++);
1368 READ_BUF(dummy);
1369 p += XDR_QUADLEN(dummy);
1370
1371 /* nii_date */
1372 READ_BUF(12);
1373 p += 3;
1374 }
1375 DECODE_TAIL;
1376 }
1377
1378 static __be32
1379 nfsd4_decode_create_session(struct nfsd4_compoundargs *argp,
1380 struct nfsd4_create_session *sess)
1381 {
1382 DECODE_HEAD;
1383 u32 dummy;
1384
1385 READ_BUF(16);
1386 COPYMEM(&sess->clientid, 8);
1387 sess->seqid = be32_to_cpup(p++);
1388 sess->flags = be32_to_cpup(p++);
1389
1390 /* Fore channel attrs */
1391 READ_BUF(28);
1392 dummy = be32_to_cpup(p++); /* headerpadsz is always 0 */
1393 sess->fore_channel.maxreq_sz = be32_to_cpup(p++);
1394 sess->fore_channel.maxresp_sz = be32_to_cpup(p++);
1395 sess->fore_channel.maxresp_cached = be32_to_cpup(p++);
1396 sess->fore_channel.maxops = be32_to_cpup(p++);
1397 sess->fore_channel.maxreqs = be32_to_cpup(p++);
1398 sess->fore_channel.nr_rdma_attrs = be32_to_cpup(p++);
1399 if (sess->fore_channel.nr_rdma_attrs == 1) {
1400 READ_BUF(4);
1401 sess->fore_channel.rdma_attrs = be32_to_cpup(p++);
1402 } else if (sess->fore_channel.nr_rdma_attrs > 1) {
1403 dprintk("Too many fore channel attr bitmaps!\n");
1404 goto xdr_error;
1405 }
1406
1407 /* Back channel attrs */
1408 READ_BUF(28);
1409 dummy = be32_to_cpup(p++); /* headerpadsz is always 0 */
1410 sess->back_channel.maxreq_sz = be32_to_cpup(p++);
1411 sess->back_channel.maxresp_sz = be32_to_cpup(p++);
1412 sess->back_channel.maxresp_cached = be32_to_cpup(p++);
1413 sess->back_channel.maxops = be32_to_cpup(p++);
1414 sess->back_channel.maxreqs = be32_to_cpup(p++);
1415 sess->back_channel.nr_rdma_attrs = be32_to_cpup(p++);
1416 if (sess->back_channel.nr_rdma_attrs == 1) {
1417 READ_BUF(4);
1418 sess->back_channel.rdma_attrs = be32_to_cpup(p++);
1419 } else if (sess->back_channel.nr_rdma_attrs > 1) {
1420 dprintk("Too many back channel attr bitmaps!\n");
1421 goto xdr_error;
1422 }
1423
1424 READ_BUF(4);
1425 sess->callback_prog = be32_to_cpup(p++);
1426 nfsd4_decode_cb_sec(argp, &sess->cb_sec);
1427 DECODE_TAIL;
1428 }
1429
1430 static __be32
1431 nfsd4_decode_destroy_session(struct nfsd4_compoundargs *argp,
1432 struct nfsd4_destroy_session *destroy_session)
1433 {
1434 DECODE_HEAD;
1435 READ_BUF(NFS4_MAX_SESSIONID_LEN);
1436 COPYMEM(destroy_session->sessionid.data, NFS4_MAX_SESSIONID_LEN);
1437
1438 DECODE_TAIL;
1439 }
1440
1441 static __be32
1442 nfsd4_decode_free_stateid(struct nfsd4_compoundargs *argp,
1443 struct nfsd4_free_stateid *free_stateid)
1444 {
1445 DECODE_HEAD;
1446
1447 READ_BUF(sizeof(stateid_t));
1448 free_stateid->fr_stateid.si_generation = be32_to_cpup(p++);
1449 COPYMEM(&free_stateid->fr_stateid.si_opaque, sizeof(stateid_opaque_t));
1450
1451 DECODE_TAIL;
1452 }
1453
1454 static __be32
1455 nfsd4_decode_sequence(struct nfsd4_compoundargs *argp,
1456 struct nfsd4_sequence *seq)
1457 {
1458 DECODE_HEAD;
1459
1460 READ_BUF(NFS4_MAX_SESSIONID_LEN + 16);
1461 COPYMEM(seq->sessionid.data, NFS4_MAX_SESSIONID_LEN);
1462 seq->seqid = be32_to_cpup(p++);
1463 seq->slotid = be32_to_cpup(p++);
1464 seq->maxslots = be32_to_cpup(p++);
1465 seq->cachethis = be32_to_cpup(p++);
1466
1467 DECODE_TAIL;
1468 }
1469
1470 static __be32
1471 nfsd4_decode_test_stateid(struct nfsd4_compoundargs *argp, struct nfsd4_test_stateid *test_stateid)
1472 {
1473 int i;
1474 __be32 *p, status;
1475 struct nfsd4_test_stateid_id *stateid;
1476
1477 READ_BUF(4);
1478 test_stateid->ts_num_ids = ntohl(*p++);
1479
1480 INIT_LIST_HEAD(&test_stateid->ts_stateid_list);
1481
1482 for (i = 0; i < test_stateid->ts_num_ids; i++) {
1483 stateid = svcxdr_tmpalloc(argp, sizeof(*stateid));
1484 if (!stateid) {
1485 status = nfserrno(-ENOMEM);
1486 goto out;
1487 }
1488
1489 INIT_LIST_HEAD(&stateid->ts_id_list);
1490 list_add_tail(&stateid->ts_id_list, &test_stateid->ts_stateid_list);
1491
1492 status = nfsd4_decode_stateid(argp, &stateid->ts_id_stateid);
1493 if (status)
1494 goto out;
1495 }
1496
1497 status = 0;
1498 out:
1499 return status;
1500 xdr_error:
1501 dprintk("NFSD: xdr error (%s:%d)\n", __FILE__, __LINE__);
1502 status = nfserr_bad_xdr;
1503 goto out;
1504 }
1505
1506 static __be32 nfsd4_decode_destroy_clientid(struct nfsd4_compoundargs *argp, struct nfsd4_destroy_clientid *dc)
1507 {
1508 DECODE_HEAD;
1509
1510 READ_BUF(8);
1511 COPYMEM(&dc->clientid, 8);
1512
1513 DECODE_TAIL;
1514 }
1515
1516 static __be32 nfsd4_decode_reclaim_complete(struct nfsd4_compoundargs *argp, struct nfsd4_reclaim_complete *rc)
1517 {
1518 DECODE_HEAD;
1519
1520 READ_BUF(4);
1521 rc->rca_one_fs = be32_to_cpup(p++);
1522
1523 DECODE_TAIL;
1524 }
1525
1526 #ifdef CONFIG_NFSD_PNFS
1527 static __be32
1528 nfsd4_decode_getdeviceinfo(struct nfsd4_compoundargs *argp,
1529 struct nfsd4_getdeviceinfo *gdev)
1530 {
1531 DECODE_HEAD;
1532 u32 num, i;
1533
1534 READ_BUF(sizeof(struct nfsd4_deviceid) + 3 * 4);
1535 COPYMEM(&gdev->gd_devid, sizeof(struct nfsd4_deviceid));
1536 gdev->gd_layout_type = be32_to_cpup(p++);
1537 gdev->gd_maxcount = be32_to_cpup(p++);
1538 num = be32_to_cpup(p++);
1539 if (num) {
1540 READ_BUF(4 * num);
1541 gdev->gd_notify_types = be32_to_cpup(p++);
1542 for (i = 1; i < num; i++) {
1543 if (be32_to_cpup(p++)) {
1544 status = nfserr_inval;
1545 goto out;
1546 }
1547 }
1548 }
1549 DECODE_TAIL;
1550 }
1551
1552 static __be32
1553 nfsd4_decode_layoutget(struct nfsd4_compoundargs *argp,
1554 struct nfsd4_layoutget *lgp)
1555 {
1556 DECODE_HEAD;
1557
1558 READ_BUF(36);
1559 lgp->lg_signal = be32_to_cpup(p++);
1560 lgp->lg_layout_type = be32_to_cpup(p++);
1561 lgp->lg_seg.iomode = be32_to_cpup(p++);
1562 p = xdr_decode_hyper(p, &lgp->lg_seg.offset);
1563 p = xdr_decode_hyper(p, &lgp->lg_seg.length);
1564 p = xdr_decode_hyper(p, &lgp->lg_minlength);
1565 nfsd4_decode_stateid(argp, &lgp->lg_sid);
1566 READ_BUF(4);
1567 lgp->lg_maxcount = be32_to_cpup(p++);
1568
1569 DECODE_TAIL;
1570 }
1571
1572 static __be32
1573 nfsd4_decode_layoutcommit(struct nfsd4_compoundargs *argp,
1574 struct nfsd4_layoutcommit *lcp)
1575 {
1576 DECODE_HEAD;
1577 u32 timechange;
1578
1579 READ_BUF(20);
1580 p = xdr_decode_hyper(p, &lcp->lc_seg.offset);
1581 p = xdr_decode_hyper(p, &lcp->lc_seg.length);
1582 lcp->lc_reclaim = be32_to_cpup(p++);
1583 nfsd4_decode_stateid(argp, &lcp->lc_sid);
1584 READ_BUF(4);
1585 lcp->lc_newoffset = be32_to_cpup(p++);
1586 if (lcp->lc_newoffset) {
1587 READ_BUF(8);
1588 p = xdr_decode_hyper(p, &lcp->lc_last_wr);
1589 } else
1590 lcp->lc_last_wr = 0;
1591 READ_BUF(4);
1592 timechange = be32_to_cpup(p++);
1593 if (timechange) {
1594 status = nfsd4_decode_time(argp, &lcp->lc_mtime);
1595 if (status)
1596 return status;
1597 } else {
1598 lcp->lc_mtime.tv_nsec = UTIME_NOW;
1599 }
1600 READ_BUF(8);
1601 lcp->lc_layout_type = be32_to_cpup(p++);
1602
1603 /*
1604 * Save the layout update in XDR format and let the layout driver deal
1605 * with it later.
1606 */
1607 lcp->lc_up_len = be32_to_cpup(p++);
1608 if (lcp->lc_up_len > 0) {
1609 READ_BUF(lcp->lc_up_len);
1610 READMEM(lcp->lc_up_layout, lcp->lc_up_len);
1611 }
1612
1613 DECODE_TAIL;
1614 }
1615
1616 static __be32
1617 nfsd4_decode_layoutreturn(struct nfsd4_compoundargs *argp,
1618 struct nfsd4_layoutreturn *lrp)
1619 {
1620 DECODE_HEAD;
1621
1622 READ_BUF(16);
1623 lrp->lr_reclaim = be32_to_cpup(p++);
1624 lrp->lr_layout_type = be32_to_cpup(p++);
1625 lrp->lr_seg.iomode = be32_to_cpup(p++);
1626 lrp->lr_return_type = be32_to_cpup(p++);
1627 if (lrp->lr_return_type == RETURN_FILE) {
1628 READ_BUF(16);
1629 p = xdr_decode_hyper(p, &lrp->lr_seg.offset);
1630 p = xdr_decode_hyper(p, &lrp->lr_seg.length);
1631 nfsd4_decode_stateid(argp, &lrp->lr_sid);
1632 READ_BUF(4);
1633 lrp->lrf_body_len = be32_to_cpup(p++);
1634 if (lrp->lrf_body_len > 0) {
1635 READ_BUF(lrp->lrf_body_len);
1636 READMEM(lrp->lrf_body, lrp->lrf_body_len);
1637 }
1638 } else {
1639 lrp->lr_seg.offset = 0;
1640 lrp->lr_seg.length = NFS4_MAX_UINT64;
1641 }
1642
1643 DECODE_TAIL;
1644 }
1645 #endif /* CONFIG_NFSD_PNFS */
1646
1647 static __be32
1648 nfsd4_decode_fallocate(struct nfsd4_compoundargs *argp,
1649 struct nfsd4_fallocate *fallocate)
1650 {
1651 DECODE_HEAD;
1652
1653 status = nfsd4_decode_stateid(argp, &fallocate->falloc_stateid);
1654 if (status)
1655 return status;
1656
1657 READ_BUF(16);
1658 p = xdr_decode_hyper(p, &fallocate->falloc_offset);
1659 xdr_decode_hyper(p, &fallocate->falloc_length);
1660
1661 DECODE_TAIL;
1662 }
1663
1664 static __be32
1665 nfsd4_decode_seek(struct nfsd4_compoundargs *argp, struct nfsd4_seek *seek)
1666 {
1667 DECODE_HEAD;
1668
1669 status = nfsd4_decode_stateid(argp, &seek->seek_stateid);
1670 if (status)
1671 return status;
1672
1673 READ_BUF(8 + 4);
1674 p = xdr_decode_hyper(p, &seek->seek_offset);
1675 seek->seek_whence = be32_to_cpup(p);
1676
1677 DECODE_TAIL;
1678 }
1679
1680 static __be32
1681 nfsd4_decode_noop(struct nfsd4_compoundargs *argp, void *p)
1682 {
1683 return nfs_ok;
1684 }
1685
1686 static __be32
1687 nfsd4_decode_notsupp(struct nfsd4_compoundargs *argp, void *p)
1688 {
1689 return nfserr_notsupp;
1690 }
1691
1692 typedef __be32(*nfsd4_dec)(struct nfsd4_compoundargs *argp, void *);
1693
1694 static nfsd4_dec nfsd4_dec_ops[] = {
1695 [OP_ACCESS] = (nfsd4_dec)nfsd4_decode_access,
1696 [OP_CLOSE] = (nfsd4_dec)nfsd4_decode_close,
1697 [OP_COMMIT] = (nfsd4_dec)nfsd4_decode_commit,
1698 [OP_CREATE] = (nfsd4_dec)nfsd4_decode_create,
1699 [OP_DELEGPURGE] = (nfsd4_dec)nfsd4_decode_notsupp,
1700 [OP_DELEGRETURN] = (nfsd4_dec)nfsd4_decode_delegreturn,
1701 [OP_GETATTR] = (nfsd4_dec)nfsd4_decode_getattr,
1702 [OP_GETFH] = (nfsd4_dec)nfsd4_decode_noop,
1703 [OP_LINK] = (nfsd4_dec)nfsd4_decode_link,
1704 [OP_LOCK] = (nfsd4_dec)nfsd4_decode_lock,
1705 [OP_LOCKT] = (nfsd4_dec)nfsd4_decode_lockt,
1706 [OP_LOCKU] = (nfsd4_dec)nfsd4_decode_locku,
1707 [OP_LOOKUP] = (nfsd4_dec)nfsd4_decode_lookup,
1708 [OP_LOOKUPP] = (nfsd4_dec)nfsd4_decode_noop,
1709 [OP_NVERIFY] = (nfsd4_dec)nfsd4_decode_verify,
1710 [OP_OPEN] = (nfsd4_dec)nfsd4_decode_open,
1711 [OP_OPENATTR] = (nfsd4_dec)nfsd4_decode_notsupp,
1712 [OP_OPEN_CONFIRM] = (nfsd4_dec)nfsd4_decode_open_confirm,
1713 [OP_OPEN_DOWNGRADE] = (nfsd4_dec)nfsd4_decode_open_downgrade,
1714 [OP_PUTFH] = (nfsd4_dec)nfsd4_decode_putfh,
1715 [OP_PUTPUBFH] = (nfsd4_dec)nfsd4_decode_putpubfh,
1716 [OP_PUTROOTFH] = (nfsd4_dec)nfsd4_decode_noop,
1717 [OP_READ] = (nfsd4_dec)nfsd4_decode_read,
1718 [OP_READDIR] = (nfsd4_dec)nfsd4_decode_readdir,
1719 [OP_READLINK] = (nfsd4_dec)nfsd4_decode_noop,
1720 [OP_REMOVE] = (nfsd4_dec)nfsd4_decode_remove,
1721 [OP_RENAME] = (nfsd4_dec)nfsd4_decode_rename,
1722 [OP_RENEW] = (nfsd4_dec)nfsd4_decode_renew,
1723 [OP_RESTOREFH] = (nfsd4_dec)nfsd4_decode_noop,
1724 [OP_SAVEFH] = (nfsd4_dec)nfsd4_decode_noop,
1725 [OP_SECINFO] = (nfsd4_dec)nfsd4_decode_secinfo,
1726 [OP_SETATTR] = (nfsd4_dec)nfsd4_decode_setattr,
1727 [OP_SETCLIENTID] = (nfsd4_dec)nfsd4_decode_setclientid,
1728 [OP_SETCLIENTID_CONFIRM] = (nfsd4_dec)nfsd4_decode_setclientid_confirm,
1729 [OP_VERIFY] = (nfsd4_dec)nfsd4_decode_verify,
1730 [OP_WRITE] = (nfsd4_dec)nfsd4_decode_write,
1731 [OP_RELEASE_LOCKOWNER] = (nfsd4_dec)nfsd4_decode_release_lockowner,
1732
1733 /* new operations for NFSv4.1 */
1734 [OP_BACKCHANNEL_CTL] = (nfsd4_dec)nfsd4_decode_backchannel_ctl,
1735 [OP_BIND_CONN_TO_SESSION]= (nfsd4_dec)nfsd4_decode_bind_conn_to_session,
1736 [OP_EXCHANGE_ID] = (nfsd4_dec)nfsd4_decode_exchange_id,
1737 [OP_CREATE_SESSION] = (nfsd4_dec)nfsd4_decode_create_session,
1738 [OP_DESTROY_SESSION] = (nfsd4_dec)nfsd4_decode_destroy_session,
1739 [OP_FREE_STATEID] = (nfsd4_dec)nfsd4_decode_free_stateid,
1740 [OP_GET_DIR_DELEGATION] = (nfsd4_dec)nfsd4_decode_notsupp,
1741 #ifdef CONFIG_NFSD_PNFS
1742 [OP_GETDEVICEINFO] = (nfsd4_dec)nfsd4_decode_getdeviceinfo,
1743 [OP_GETDEVICELIST] = (nfsd4_dec)nfsd4_decode_notsupp,
1744 [OP_LAYOUTCOMMIT] = (nfsd4_dec)nfsd4_decode_layoutcommit,
1745 [OP_LAYOUTGET] = (nfsd4_dec)nfsd4_decode_layoutget,
1746 [OP_LAYOUTRETURN] = (nfsd4_dec)nfsd4_decode_layoutreturn,
1747 #else
1748 [OP_GETDEVICEINFO] = (nfsd4_dec)nfsd4_decode_notsupp,
1749 [OP_GETDEVICELIST] = (nfsd4_dec)nfsd4_decode_notsupp,
1750 [OP_LAYOUTCOMMIT] = (nfsd4_dec)nfsd4_decode_notsupp,
1751 [OP_LAYOUTGET] = (nfsd4_dec)nfsd4_decode_notsupp,
1752 [OP_LAYOUTRETURN] = (nfsd4_dec)nfsd4_decode_notsupp,
1753 #endif
1754 [OP_SECINFO_NO_NAME] = (nfsd4_dec)nfsd4_decode_secinfo_no_name,
1755 [OP_SEQUENCE] = (nfsd4_dec)nfsd4_decode_sequence,
1756 [OP_SET_SSV] = (nfsd4_dec)nfsd4_decode_notsupp,
1757 [OP_TEST_STATEID] = (nfsd4_dec)nfsd4_decode_test_stateid,
1758 [OP_WANT_DELEGATION] = (nfsd4_dec)nfsd4_decode_notsupp,
1759 [OP_DESTROY_CLIENTID] = (nfsd4_dec)nfsd4_decode_destroy_clientid,
1760 [OP_RECLAIM_COMPLETE] = (nfsd4_dec)nfsd4_decode_reclaim_complete,
1761
1762 /* new operations for NFSv4.2 */
1763 [OP_ALLOCATE] = (nfsd4_dec)nfsd4_decode_fallocate,
1764 [OP_COPY] = (nfsd4_dec)nfsd4_decode_notsupp,
1765 [OP_COPY_NOTIFY] = (nfsd4_dec)nfsd4_decode_notsupp,
1766 [OP_DEALLOCATE] = (nfsd4_dec)nfsd4_decode_fallocate,
1767 [OP_IO_ADVISE] = (nfsd4_dec)nfsd4_decode_notsupp,
1768 [OP_LAYOUTERROR] = (nfsd4_dec)nfsd4_decode_notsupp,
1769 [OP_LAYOUTSTATS] = (nfsd4_dec)nfsd4_decode_notsupp,
1770 [OP_OFFLOAD_CANCEL] = (nfsd4_dec)nfsd4_decode_notsupp,
1771 [OP_OFFLOAD_STATUS] = (nfsd4_dec)nfsd4_decode_notsupp,
1772 [OP_READ_PLUS] = (nfsd4_dec)nfsd4_decode_notsupp,
1773 [OP_SEEK] = (nfsd4_dec)nfsd4_decode_seek,
1774 [OP_WRITE_SAME] = (nfsd4_dec)nfsd4_decode_notsupp,
1775 };
1776
1777 static inline bool
1778 nfsd4_opnum_in_range(struct nfsd4_compoundargs *argp, struct nfsd4_op *op)
1779 {
1780 if (op->opnum < FIRST_NFS4_OP)
1781 return false;
1782 else if (argp->minorversion == 0 && op->opnum > LAST_NFS40_OP)
1783 return false;
1784 else if (argp->minorversion == 1 && op->opnum > LAST_NFS41_OP)
1785 return false;
1786 else if (argp->minorversion == 2 && op->opnum > LAST_NFS42_OP)
1787 return false;
1788 return true;
1789 }
1790
1791 static __be32
1792 nfsd4_decode_compound(struct nfsd4_compoundargs *argp)
1793 {
1794 DECODE_HEAD;
1795 struct nfsd4_op *op;
1796 bool cachethis = false;
1797 int auth_slack= argp->rqstp->rq_auth_slack;
1798 int max_reply = auth_slack + 8; /* opcnt, status */
1799 int readcount = 0;
1800 int readbytes = 0;
1801 int i;
1802
1803 READ_BUF(4);
1804 argp->taglen = be32_to_cpup(p++);
1805 READ_BUF(argp->taglen + 8);
1806 SAVEMEM(argp->tag, argp->taglen);
1807 argp->minorversion = be32_to_cpup(p++);
1808 argp->opcnt = be32_to_cpup(p++);
1809 max_reply += 4 + (XDR_QUADLEN(argp->taglen) << 2);
1810
1811 if (argp->taglen > NFSD4_MAX_TAGLEN)
1812 goto xdr_error;
1813 if (argp->opcnt > 100)
1814 goto xdr_error;
1815
1816 if (argp->opcnt > ARRAY_SIZE(argp->iops)) {
1817 argp->ops = kzalloc(argp->opcnt * sizeof(*argp->ops), GFP_KERNEL);
1818 if (!argp->ops) {
1819 argp->ops = argp->iops;
1820 dprintk("nfsd: couldn't allocate room for COMPOUND\n");
1821 goto xdr_error;
1822 }
1823 }
1824
1825 if (argp->minorversion > NFSD_SUPPORTED_MINOR_VERSION)
1826 argp->opcnt = 0;
1827
1828 for (i = 0; i < argp->opcnt; i++) {
1829 op = &argp->ops[i];
1830 op->replay = NULL;
1831
1832 READ_BUF(4);
1833 op->opnum = be32_to_cpup(p++);
1834
1835 if (nfsd4_opnum_in_range(argp, op))
1836 op->status = nfsd4_dec_ops[op->opnum](argp, &op->u);
1837 else {
1838 op->opnum = OP_ILLEGAL;
1839 op->status = nfserr_op_illegal;
1840 }
1841 /*
1842 * We'll try to cache the result in the DRC if any one
1843 * op in the compound wants to be cached:
1844 */
1845 cachethis |= nfsd4_cache_this_op(op);
1846
1847 if (op->opnum == OP_READ) {
1848 readcount++;
1849 readbytes += nfsd4_max_reply(argp->rqstp, op);
1850 } else
1851 max_reply += nfsd4_max_reply(argp->rqstp, op);
1852 /*
1853 * OP_LOCK may return a conflicting lock. (Special case
1854 * because it will just skip encoding this if it runs
1855 * out of xdr buffer space, and it is the only operation
1856 * that behaves this way.)
1857 */
1858 if (op->opnum == OP_LOCK)
1859 max_reply += NFS4_OPAQUE_LIMIT;
1860
1861 if (op->status) {
1862 argp->opcnt = i+1;
1863 break;
1864 }
1865 }
1866 /* Sessions make the DRC unnecessary: */
1867 if (argp->minorversion)
1868 cachethis = false;
1869 svc_reserve(argp->rqstp, max_reply + readbytes);
1870 argp->rqstp->rq_cachetype = cachethis ? RC_REPLBUFF : RC_NOCACHE;
1871
1872 if (readcount > 1 || max_reply > PAGE_SIZE - auth_slack)
1873 clear_bit(RQ_SPLICE_OK, &argp->rqstp->rq_flags);
1874
1875 DECODE_TAIL;
1876 }
1877
1878 static __be32 *encode_change(__be32 *p, struct kstat *stat, struct inode *inode)
1879 {
1880 if (IS_I_VERSION(inode)) {
1881 p = xdr_encode_hyper(p, inode->i_version);
1882 } else {
1883 *p++ = cpu_to_be32(stat->ctime.tv_sec);
1884 *p++ = cpu_to_be32(stat->ctime.tv_nsec);
1885 }
1886 return p;
1887 }
1888
1889 static __be32 *encode_cinfo(__be32 *p, struct nfsd4_change_info *c)
1890 {
1891 *p++ = cpu_to_be32(c->atomic);
1892 if (c->change_supported) {
1893 p = xdr_encode_hyper(p, c->before_change);
1894 p = xdr_encode_hyper(p, c->after_change);
1895 } else {
1896 *p++ = cpu_to_be32(c->before_ctime_sec);
1897 *p++ = cpu_to_be32(c->before_ctime_nsec);
1898 *p++ = cpu_to_be32(c->after_ctime_sec);
1899 *p++ = cpu_to_be32(c->after_ctime_nsec);
1900 }
1901 return p;
1902 }
1903
1904 /* Encode as an array of strings the string given with components
1905 * separated @sep, escaped with esc_enter and esc_exit.
1906 */
1907 static __be32 nfsd4_encode_components_esc(struct xdr_stream *xdr, char sep,
1908 char *components, char esc_enter,
1909 char esc_exit)
1910 {
1911 __be32 *p;
1912 __be32 pathlen;
1913 int pathlen_offset;
1914 int strlen, count=0;
1915 char *str, *end, *next;
1916
1917 dprintk("nfsd4_encode_components(%s)\n", components);
1918
1919 pathlen_offset = xdr->buf->len;
1920 p = xdr_reserve_space(xdr, 4);
1921 if (!p)
1922 return nfserr_resource;
1923 p++; /* We will fill this in with @count later */
1924
1925 end = str = components;
1926 while (*end) {
1927 bool found_esc = false;
1928
1929 /* try to parse as esc_start, ..., esc_end, sep */
1930 if (*str == esc_enter) {
1931 for (; *end && (*end != esc_exit); end++)
1932 /* find esc_exit or end of string */;
1933 next = end + 1;
1934 if (*end && (!*next || *next == sep)) {
1935 str++;
1936 found_esc = true;
1937 }
1938 }
1939
1940 if (!found_esc)
1941 for (; *end && (*end != sep); end++)
1942 /* find sep or end of string */;
1943
1944 strlen = end - str;
1945 if (strlen) {
1946 p = xdr_reserve_space(xdr, strlen + 4);
1947 if (!p)
1948 return nfserr_resource;
1949 p = xdr_encode_opaque(p, str, strlen);
1950 count++;
1951 }
1952 else
1953 end++;
1954 if (found_esc)
1955 end = next;
1956
1957 str = end;
1958 }
1959 pathlen = htonl(count);
1960 write_bytes_to_xdr_buf(xdr->buf, pathlen_offset, &pathlen, 4);
1961 return 0;
1962 }
1963
1964 /* Encode as an array of strings the string given with components
1965 * separated @sep.
1966 */
1967 static __be32 nfsd4_encode_components(struct xdr_stream *xdr, char sep,
1968 char *components)
1969 {
1970 return nfsd4_encode_components_esc(xdr, sep, components, 0, 0);
1971 }
1972
1973 /*
1974 * encode a location element of a fs_locations structure
1975 */
1976 static __be32 nfsd4_encode_fs_location4(struct xdr_stream *xdr,
1977 struct nfsd4_fs_location *location)
1978 {
1979 __be32 status;
1980
1981 status = nfsd4_encode_components_esc(xdr, ':', location->hosts,
1982 '[', ']');
1983 if (status)
1984 return status;
1985 status = nfsd4_encode_components(xdr, '/', location->path);
1986 if (status)
1987 return status;
1988 return 0;
1989 }
1990
1991 /*
1992 * Encode a path in RFC3530 'pathname4' format
1993 */
1994 static __be32 nfsd4_encode_path(struct xdr_stream *xdr,
1995 const struct path *root,
1996 const struct path *path)
1997 {
1998 struct path cur = *path;
1999 __be32 *p;
2000 struct dentry **components = NULL;
2001 unsigned int ncomponents = 0;
2002 __be32 err = nfserr_jukebox;
2003
2004 dprintk("nfsd4_encode_components(");
2005
2006 path_get(&cur);
2007 /* First walk the path up to the nfsd root, and store the
2008 * dentries/path components in an array.
2009 */
2010 for (;;) {
2011 if (cur.dentry == root->dentry && cur.mnt == root->mnt)
2012 break;
2013 if (cur.dentry == cur.mnt->mnt_root) {
2014 if (follow_up(&cur))
2015 continue;
2016 goto out_free;
2017 }
2018 if ((ncomponents & 15) == 0) {
2019 struct dentry **new;
2020 new = krealloc(components,
2021 sizeof(*new) * (ncomponents + 16),
2022 GFP_KERNEL);
2023 if (!new)
2024 goto out_free;
2025 components = new;
2026 }
2027 components[ncomponents++] = cur.dentry;
2028 cur.dentry = dget_parent(cur.dentry);
2029 }
2030 err = nfserr_resource;
2031 p = xdr_reserve_space(xdr, 4);
2032 if (!p)
2033 goto out_free;
2034 *p++ = cpu_to_be32(ncomponents);
2035
2036 while (ncomponents) {
2037 struct dentry *dentry = components[ncomponents - 1];
2038 unsigned int len;
2039
2040 spin_lock(&dentry->d_lock);
2041 len = dentry->d_name.len;
2042 p = xdr_reserve_space(xdr, len + 4);
2043 if (!p) {
2044 spin_unlock(&dentry->d_lock);
2045 goto out_free;
2046 }
2047 p = xdr_encode_opaque(p, dentry->d_name.name, len);
2048 dprintk("/%pd", dentry);
2049 spin_unlock(&dentry->d_lock);
2050 dput(dentry);
2051 ncomponents--;
2052 }
2053
2054 err = 0;
2055 out_free:
2056 dprintk(")\n");
2057 while (ncomponents)
2058 dput(components[--ncomponents]);
2059 kfree(components);
2060 path_put(&cur);
2061 return err;
2062 }
2063
2064 static __be32 nfsd4_encode_fsloc_fsroot(struct xdr_stream *xdr,
2065 struct svc_rqst *rqstp, const struct path *path)
2066 {
2067 struct svc_export *exp_ps;
2068 __be32 res;
2069
2070 exp_ps = rqst_find_fsidzero_export(rqstp);
2071 if (IS_ERR(exp_ps))
2072 return nfserrno(PTR_ERR(exp_ps));
2073 res = nfsd4_encode_path(xdr, &exp_ps->ex_path, path);
2074 exp_put(exp_ps);
2075 return res;
2076 }
2077
2078 /*
2079 * encode a fs_locations structure
2080 */
2081 static __be32 nfsd4_encode_fs_locations(struct xdr_stream *xdr,
2082 struct svc_rqst *rqstp, struct svc_export *exp)
2083 {
2084 __be32 status;
2085 int i;
2086 __be32 *p;
2087 struct nfsd4_fs_locations *fslocs = &exp->ex_fslocs;
2088
2089 status = nfsd4_encode_fsloc_fsroot(xdr, rqstp, &exp->ex_path);
2090 if (status)
2091 return status;
2092 p = xdr_reserve_space(xdr, 4);
2093 if (!p)
2094 return nfserr_resource;
2095 *p++ = cpu_to_be32(fslocs->locations_count);
2096 for (i=0; i<fslocs->locations_count; i++) {
2097 status = nfsd4_encode_fs_location4(xdr, &fslocs->locations[i]);
2098 if (status)
2099 return status;
2100 }
2101 return 0;
2102 }
2103
2104 static u32 nfs4_file_type(umode_t mode)
2105 {
2106 switch (mode & S_IFMT) {
2107 case S_IFIFO: return NF4FIFO;
2108 case S_IFCHR: return NF4CHR;
2109 case S_IFDIR: return NF4DIR;
2110 case S_IFBLK: return NF4BLK;
2111 case S_IFLNK: return NF4LNK;
2112 case S_IFREG: return NF4REG;
2113 case S_IFSOCK: return NF4SOCK;
2114 default: return NF4BAD;
2115 };
2116 }
2117
2118 static inline __be32
2119 nfsd4_encode_aclname(struct xdr_stream *xdr, struct svc_rqst *rqstp,
2120 struct nfs4_ace *ace)
2121 {
2122 if (ace->whotype != NFS4_ACL_WHO_NAMED)
2123 return nfs4_acl_write_who(xdr, ace->whotype);
2124 else if (ace->flag & NFS4_ACE_IDENTIFIER_GROUP)
2125 return nfsd4_encode_group(xdr, rqstp, ace->who_gid);
2126 else
2127 return nfsd4_encode_user(xdr, rqstp, ace->who_uid);
2128 }
2129
2130 #define WORD0_ABSENT_FS_ATTRS (FATTR4_WORD0_FS_LOCATIONS | FATTR4_WORD0_FSID | \
2131 FATTR4_WORD0_RDATTR_ERROR)
2132 #define WORD1_ABSENT_FS_ATTRS FATTR4_WORD1_MOUNTED_ON_FILEID
2133
2134 #ifdef CONFIG_NFSD_V4_SECURITY_LABEL
2135 static inline __be32
2136 nfsd4_encode_security_label(struct xdr_stream *xdr, struct svc_rqst *rqstp,
2137 void *context, int len)
2138 {
2139 __be32 *p;
2140
2141 p = xdr_reserve_space(xdr, len + 4 + 4 + 4);
2142 if (!p)
2143 return nfserr_resource;
2144
2145 /*
2146 * For now we use a 0 here to indicate the null translation; in
2147 * the future we may place a call to translation code here.
2148 */
2149 *p++ = cpu_to_be32(0); /* lfs */
2150 *p++ = cpu_to_be32(0); /* pi */
2151 p = xdr_encode_opaque(p, context, len);
2152 return 0;
2153 }
2154 #else
2155 static inline __be32
2156 nfsd4_encode_security_label(struct xdr_stream *xdr, struct svc_rqst *rqstp,
2157 void *context, int len)
2158 { return 0; }
2159 #endif
2160
2161 static __be32 fattr_handle_absent_fs(u32 *bmval0, u32 *bmval1, u32 *rdattr_err)
2162 {
2163 /* As per referral draft: */
2164 if (*bmval0 & ~WORD0_ABSENT_FS_ATTRS ||
2165 *bmval1 & ~WORD1_ABSENT_FS_ATTRS) {
2166 if (*bmval0 & FATTR4_WORD0_RDATTR_ERROR ||
2167 *bmval0 & FATTR4_WORD0_FS_LOCATIONS)
2168 *rdattr_err = NFSERR_MOVED;
2169 else
2170 return nfserr_moved;
2171 }
2172 *bmval0 &= WORD0_ABSENT_FS_ATTRS;
2173 *bmval1 &= WORD1_ABSENT_FS_ATTRS;
2174 return 0;
2175 }
2176
2177
2178 static int get_parent_attributes(struct svc_export *exp, struct kstat *stat)
2179 {
2180 struct path path = exp->ex_path;
2181 int err;
2182
2183 path_get(&path);
2184 while (follow_up(&path)) {
2185 if (path.dentry != path.mnt->mnt_root)
2186 break;
2187 }
2188 err = vfs_getattr(&path, stat);
2189 path_put(&path);
2190 return err;
2191 }
2192
2193 /*
2194 * Note: @fhp can be NULL; in this case, we might have to compose the filehandle
2195 * ourselves.
2196 */
2197 static __be32
2198 nfsd4_encode_fattr(struct xdr_stream *xdr, struct svc_fh *fhp,
2199 struct svc_export *exp,
2200 struct dentry *dentry, u32 *bmval,
2201 struct svc_rqst *rqstp, int ignore_crossmnt)
2202 {
2203 u32 bmval0 = bmval[0];
2204 u32 bmval1 = bmval[1];
2205 u32 bmval2 = bmval[2];
2206 struct kstat stat;
2207 struct svc_fh *tempfh = NULL;
2208 struct kstatfs statfs;
2209 __be32 *p;
2210 int starting_len = xdr->buf->len;
2211 int attrlen_offset;
2212 __be32 attrlen;
2213 u32 dummy;
2214 u64 dummy64;
2215 u32 rdattr_err = 0;
2216 __be32 status;
2217 int err;
2218 int aclsupport = 0;
2219 struct nfs4_acl *acl = NULL;
2220 void *context = NULL;
2221 int contextlen;
2222 bool contextsupport = false;
2223 struct nfsd4_compoundres *resp = rqstp->rq_resp;
2224 u32 minorversion = resp->cstate.minorversion;
2225 struct path path = {
2226 .mnt = exp->ex_path.mnt,
2227 .dentry = dentry,
2228 };
2229 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
2230
2231 BUG_ON(bmval1 & NFSD_WRITEONLY_ATTRS_WORD1);
2232 BUG_ON(bmval0 & ~nfsd_suppattrs0(minorversion));
2233 BUG_ON(bmval1 & ~nfsd_suppattrs1(minorversion));
2234 BUG_ON(bmval2 & ~nfsd_suppattrs2(minorversion));
2235
2236 if (exp->ex_fslocs.migrated) {
2237 BUG_ON(bmval[2]);
2238 status = fattr_handle_absent_fs(&bmval0, &bmval1, &rdattr_err);
2239 if (status)
2240 goto out;
2241 }
2242
2243 err = vfs_getattr(&path, &stat);
2244 if (err)
2245 goto out_nfserr;
2246 if ((bmval0 & (FATTR4_WORD0_FILES_AVAIL | FATTR4_WORD0_FILES_FREE |
2247 FATTR4_WORD0_FILES_TOTAL | FATTR4_WORD0_MAXNAME)) ||
2248 (bmval1 & (FATTR4_WORD1_SPACE_AVAIL | FATTR4_WORD1_SPACE_FREE |
2249 FATTR4_WORD1_SPACE_TOTAL))) {
2250 err = vfs_statfs(&path, &statfs);
2251 if (err)
2252 goto out_nfserr;
2253 }
2254 if ((bmval0 & (FATTR4_WORD0_FILEHANDLE | FATTR4_WORD0_FSID)) && !fhp) {
2255 tempfh = kmalloc(sizeof(struct svc_fh), GFP_KERNEL);
2256 status = nfserr_jukebox;
2257 if (!tempfh)
2258 goto out;
2259 fh_init(tempfh, NFS4_FHSIZE);
2260 status = fh_compose(tempfh, exp, dentry, NULL);
2261 if (status)
2262 goto out;
2263 fhp = tempfh;
2264 }
2265 if (bmval0 & (FATTR4_WORD0_ACL | FATTR4_WORD0_ACLSUPPORT
2266 | FATTR4_WORD0_SUPPORTED_ATTRS)) {
2267 err = nfsd4_get_nfs4_acl(rqstp, dentry, &acl);
2268 aclsupport = (err == 0);
2269 if (bmval0 & FATTR4_WORD0_ACL) {
2270 if (err == -EOPNOTSUPP)
2271 bmval0 &= ~FATTR4_WORD0_ACL;
2272 else if (err == -EINVAL) {
2273 status = nfserr_attrnotsupp;
2274 goto out;
2275 } else if (err != 0)
2276 goto out_nfserr;
2277 }
2278 }
2279
2280 #ifdef CONFIG_NFSD_V4_SECURITY_LABEL
2281 if ((bmval[2] & FATTR4_WORD2_SECURITY_LABEL) ||
2282 bmval[0] & FATTR4_WORD0_SUPPORTED_ATTRS) {
2283 err = security_inode_getsecctx(dentry->d_inode,
2284 &context, &contextlen);
2285 contextsupport = (err == 0);
2286 if (bmval2 & FATTR4_WORD2_SECURITY_LABEL) {
2287 if (err == -EOPNOTSUPP)
2288 bmval2 &= ~FATTR4_WORD2_SECURITY_LABEL;
2289 else if (err)
2290 goto out_nfserr;
2291 }
2292 }
2293 #endif /* CONFIG_NFSD_V4_SECURITY_LABEL */
2294
2295 if (bmval2) {
2296 p = xdr_reserve_space(xdr, 16);
2297 if (!p)
2298 goto out_resource;
2299 *p++ = cpu_to_be32(3);
2300 *p++ = cpu_to_be32(bmval0);
2301 *p++ = cpu_to_be32(bmval1);
2302 *p++ = cpu_to_be32(bmval2);
2303 } else if (bmval1) {
2304 p = xdr_reserve_space(xdr, 12);
2305 if (!p)
2306 goto out_resource;
2307 *p++ = cpu_to_be32(2);
2308 *p++ = cpu_to_be32(bmval0);
2309 *p++ = cpu_to_be32(bmval1);
2310 } else {
2311 p = xdr_reserve_space(xdr, 8);
2312 if (!p)
2313 goto out_resource;
2314 *p++ = cpu_to_be32(1);
2315 *p++ = cpu_to_be32(bmval0);
2316 }
2317
2318 attrlen_offset = xdr->buf->len;
2319 p = xdr_reserve_space(xdr, 4);
2320 if (!p)
2321 goto out_resource;
2322 p++; /* to be backfilled later */
2323
2324 if (bmval0 & FATTR4_WORD0_SUPPORTED_ATTRS) {
2325 u32 word0 = nfsd_suppattrs0(minorversion);
2326 u32 word1 = nfsd_suppattrs1(minorversion);
2327 u32 word2 = nfsd_suppattrs2(minorversion);
2328
2329 if (!aclsupport)
2330 word0 &= ~FATTR4_WORD0_ACL;
2331 if (!contextsupport)
2332 word2 &= ~FATTR4_WORD2_SECURITY_LABEL;
2333 if (!word2) {
2334 p = xdr_reserve_space(xdr, 12);
2335 if (!p)
2336 goto out_resource;
2337 *p++ = cpu_to_be32(2);
2338 *p++ = cpu_to_be32(word0);
2339 *p++ = cpu_to_be32(word1);
2340 } else {
2341 p = xdr_reserve_space(xdr, 16);
2342 if (!p)
2343 goto out_resource;
2344 *p++ = cpu_to_be32(3);
2345 *p++ = cpu_to_be32(word0);
2346 *p++ = cpu_to_be32(word1);
2347 *p++ = cpu_to_be32(word2);
2348 }
2349 }
2350 if (bmval0 & FATTR4_WORD0_TYPE) {
2351 p = xdr_reserve_space(xdr, 4);
2352 if (!p)
2353 goto out_resource;
2354 dummy = nfs4_file_type(stat.mode);
2355 if (dummy == NF4BAD) {
2356 status = nfserr_serverfault;
2357 goto out;
2358 }
2359 *p++ = cpu_to_be32(dummy);
2360 }
2361 if (bmval0 & FATTR4_WORD0_FH_EXPIRE_TYPE) {
2362 p = xdr_reserve_space(xdr, 4);
2363 if (!p)
2364 goto out_resource;
2365 if (exp->ex_flags & NFSEXP_NOSUBTREECHECK)
2366 *p++ = cpu_to_be32(NFS4_FH_PERSISTENT);
2367 else
2368 *p++ = cpu_to_be32(NFS4_FH_PERSISTENT|
2369 NFS4_FH_VOL_RENAME);
2370 }
2371 if (bmval0 & FATTR4_WORD0_CHANGE) {
2372 p = xdr_reserve_space(xdr, 8);
2373 if (!p)
2374 goto out_resource;
2375 p = encode_change(p, &stat, dentry->d_inode);
2376 }
2377 if (bmval0 & FATTR4_WORD0_SIZE) {
2378 p = xdr_reserve_space(xdr, 8);
2379 if (!p)
2380 goto out_resource;
2381 p = xdr_encode_hyper(p, stat.size);
2382 }
2383 if (bmval0 & FATTR4_WORD0_LINK_SUPPORT) {
2384 p = xdr_reserve_space(xdr, 4);
2385 if (!p)
2386 goto out_resource;
2387 *p++ = cpu_to_be32(1);
2388 }
2389 if (bmval0 & FATTR4_WORD0_SYMLINK_SUPPORT) {
2390 p = xdr_reserve_space(xdr, 4);
2391 if (!p)
2392 goto out_resource;
2393 *p++ = cpu_to_be32(1);
2394 }
2395 if (bmval0 & FATTR4_WORD0_NAMED_ATTR) {
2396 p = xdr_reserve_space(xdr, 4);
2397 if (!p)
2398 goto out_resource;
2399 *p++ = cpu_to_be32(0);
2400 }
2401 if (bmval0 & FATTR4_WORD0_FSID) {
2402 p = xdr_reserve_space(xdr, 16);
2403 if (!p)
2404 goto out_resource;
2405 if (exp->ex_fslocs.migrated) {
2406 p = xdr_encode_hyper(p, NFS4_REFERRAL_FSID_MAJOR);
2407 p = xdr_encode_hyper(p, NFS4_REFERRAL_FSID_MINOR);
2408 } else switch(fsid_source(fhp)) {
2409 case FSIDSOURCE_FSID:
2410 p = xdr_encode_hyper(p, (u64)exp->ex_fsid);
2411 p = xdr_encode_hyper(p, (u64)0);
2412 break;
2413 case FSIDSOURCE_DEV:
2414 *p++ = cpu_to_be32(0);
2415 *p++ = cpu_to_be32(MAJOR(stat.dev));
2416 *p++ = cpu_to_be32(0);
2417 *p++ = cpu_to_be32(MINOR(stat.dev));
2418 break;
2419 case FSIDSOURCE_UUID:
2420 p = xdr_encode_opaque_fixed(p, exp->ex_uuid,
2421 EX_UUID_LEN);
2422 break;
2423 }
2424 }
2425 if (bmval0 & FATTR4_WORD0_UNIQUE_HANDLES) {
2426 p = xdr_reserve_space(xdr, 4);
2427 if (!p)
2428 goto out_resource;
2429 *p++ = cpu_to_be32(0);
2430 }
2431 if (bmval0 & FATTR4_WORD0_LEASE_TIME) {
2432 p = xdr_reserve_space(xdr, 4);
2433 if (!p)
2434 goto out_resource;
2435 *p++ = cpu_to_be32(nn->nfsd4_lease);
2436 }
2437 if (bmval0 & FATTR4_WORD0_RDATTR_ERROR) {
2438 p = xdr_reserve_space(xdr, 4);
2439 if (!p)
2440 goto out_resource;
2441 *p++ = cpu_to_be32(rdattr_err);
2442 }
2443 if (bmval0 & FATTR4_WORD0_ACL) {
2444 struct nfs4_ace *ace;
2445
2446 if (acl == NULL) {
2447 p = xdr_reserve_space(xdr, 4);
2448 if (!p)
2449 goto out_resource;
2450
2451 *p++ = cpu_to_be32(0);
2452 goto out_acl;
2453 }
2454 p = xdr_reserve_space(xdr, 4);
2455 if (!p)
2456 goto out_resource;
2457 *p++ = cpu_to_be32(acl->naces);
2458
2459 for (ace = acl->aces; ace < acl->aces + acl->naces; ace++) {
2460 p = xdr_reserve_space(xdr, 4*3);
2461 if (!p)
2462 goto out_resource;
2463 *p++ = cpu_to_be32(ace->type);
2464 *p++ = cpu_to_be32(ace->flag);
2465 *p++ = cpu_to_be32(ace->access_mask &
2466 NFS4_ACE_MASK_ALL);
2467 status = nfsd4_encode_aclname(xdr, rqstp, ace);
2468 if (status)
2469 goto out;
2470 }
2471 }
2472 out_acl:
2473 if (bmval0 & FATTR4_WORD0_ACLSUPPORT) {
2474 p = xdr_reserve_space(xdr, 4);
2475 if (!p)
2476 goto out_resource;
2477 *p++ = cpu_to_be32(aclsupport ?
2478 ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL : 0);
2479 }
2480 if (bmval0 & FATTR4_WORD0_CANSETTIME) {
2481 p = xdr_reserve_space(xdr, 4);
2482 if (!p)
2483 goto out_resource;
2484 *p++ = cpu_to_be32(1);
2485 }
2486 if (bmval0 & FATTR4_WORD0_CASE_INSENSITIVE) {
2487 p = xdr_reserve_space(xdr, 4);
2488 if (!p)
2489 goto out_resource;
2490 *p++ = cpu_to_be32(0);
2491 }
2492 if (bmval0 & FATTR4_WORD0_CASE_PRESERVING) {
2493 p = xdr_reserve_space(xdr, 4);
2494 if (!p)
2495 goto out_resource;
2496 *p++ = cpu_to_be32(1);
2497 }
2498 if (bmval0 & FATTR4_WORD0_CHOWN_RESTRICTED) {
2499 p = xdr_reserve_space(xdr, 4);
2500 if (!p)
2501 goto out_resource;
2502 *p++ = cpu_to_be32(1);
2503 }
2504 if (bmval0 & FATTR4_WORD0_FILEHANDLE) {
2505 p = xdr_reserve_space(xdr, fhp->fh_handle.fh_size + 4);
2506 if (!p)
2507 goto out_resource;
2508 p = xdr_encode_opaque(p, &fhp->fh_handle.fh_base,
2509 fhp->fh_handle.fh_size);
2510 }
2511 if (bmval0 & FATTR4_WORD0_FILEID) {
2512 p = xdr_reserve_space(xdr, 8);
2513 if (!p)
2514 goto out_resource;
2515 p = xdr_encode_hyper(p, stat.ino);
2516 }
2517 if (bmval0 & FATTR4_WORD0_FILES_AVAIL) {
2518 p = xdr_reserve_space(xdr, 8);
2519 if (!p)
2520 goto out_resource;
2521 p = xdr_encode_hyper(p, (u64) statfs.f_ffree);
2522 }
2523 if (bmval0 & FATTR4_WORD0_FILES_FREE) {
2524 p = xdr_reserve_space(xdr, 8);
2525 if (!p)
2526 goto out_resource;
2527 p = xdr_encode_hyper(p, (u64) statfs.f_ffree);
2528 }
2529 if (bmval0 & FATTR4_WORD0_FILES_TOTAL) {
2530 p = xdr_reserve_space(xdr, 8);
2531 if (!p)
2532 goto out_resource;
2533 p = xdr_encode_hyper(p, (u64) statfs.f_files);
2534 }
2535 if (bmval0 & FATTR4_WORD0_FS_LOCATIONS) {
2536 status = nfsd4_encode_fs_locations(xdr, rqstp, exp);
2537 if (status)
2538 goto out;
2539 }
2540 if (bmval0 & FATTR4_WORD0_HOMOGENEOUS) {
2541 p = xdr_reserve_space(xdr, 4);
2542 if (!p)
2543 goto out_resource;
2544 *p++ = cpu_to_be32(1);
2545 }
2546 if (bmval0 & FATTR4_WORD0_MAXFILESIZE) {
2547 p = xdr_reserve_space(xdr, 8);
2548 if (!p)
2549 goto out_resource;
2550 p = xdr_encode_hyper(p, exp->ex_path.mnt->mnt_sb->s_maxbytes);
2551 }
2552 if (bmval0 & FATTR4_WORD0_MAXLINK) {
2553 p = xdr_reserve_space(xdr, 4);
2554 if (!p)
2555 goto out_resource;
2556 *p++ = cpu_to_be32(255);
2557 }
2558 if (bmval0 & FATTR4_WORD0_MAXNAME) {
2559 p = xdr_reserve_space(xdr, 4);
2560 if (!p)
2561 goto out_resource;
2562 *p++ = cpu_to_be32(statfs.f_namelen);
2563 }
2564 if (bmval0 & FATTR4_WORD0_MAXREAD) {
2565 p = xdr_reserve_space(xdr, 8);
2566 if (!p)
2567 goto out_resource;
2568 p = xdr_encode_hyper(p, (u64) svc_max_payload(rqstp));
2569 }
2570 if (bmval0 & FATTR4_WORD0_MAXWRITE) {
2571 p = xdr_reserve_space(xdr, 8);
2572 if (!p)
2573 goto out_resource;
2574 p = xdr_encode_hyper(p, (u64) svc_max_payload(rqstp));
2575 }
2576 if (bmval1 & FATTR4_WORD1_MODE) {
2577 p = xdr_reserve_space(xdr, 4);
2578 if (!p)
2579 goto out_resource;
2580 *p++ = cpu_to_be32(stat.mode & S_IALLUGO);
2581 }
2582 if (bmval1 & FATTR4_WORD1_NO_TRUNC) {
2583 p = xdr_reserve_space(xdr, 4);
2584 if (!p)
2585 goto out_resource;
2586 *p++ = cpu_to_be32(1);
2587 }
2588 if (bmval1 & FATTR4_WORD1_NUMLINKS) {
2589 p = xdr_reserve_space(xdr, 4);
2590 if (!p)
2591 goto out_resource;
2592 *p++ = cpu_to_be32(stat.nlink);
2593 }
2594 if (bmval1 & FATTR4_WORD1_OWNER) {
2595 status = nfsd4_encode_user(xdr, rqstp, stat.uid);
2596 if (status)
2597 goto out;
2598 }
2599 if (bmval1 & FATTR4_WORD1_OWNER_GROUP) {
2600 status = nfsd4_encode_group(xdr, rqstp, stat.gid);
2601 if (status)
2602 goto out;
2603 }
2604 if (bmval1 & FATTR4_WORD1_RAWDEV) {
2605 p = xdr_reserve_space(xdr, 8);
2606 if (!p)
2607 goto out_resource;
2608 *p++ = cpu_to_be32((u32) MAJOR(stat.rdev));
2609 *p++ = cpu_to_be32((u32) MINOR(stat.rdev));
2610 }
2611 if (bmval1 & FATTR4_WORD1_SPACE_AVAIL) {
2612 p = xdr_reserve_space(xdr, 8);
2613 if (!p)
2614 goto out_resource;
2615 dummy64 = (u64)statfs.f_bavail * (u64)statfs.f_bsize;
2616 p = xdr_encode_hyper(p, dummy64);
2617 }
2618 if (bmval1 & FATTR4_WORD1_SPACE_FREE) {
2619 p = xdr_reserve_space(xdr, 8);
2620 if (!p)
2621 goto out_resource;
2622 dummy64 = (u64)statfs.f_bfree * (u64)statfs.f_bsize;
2623 p = xdr_encode_hyper(p, dummy64);
2624 }
2625 if (bmval1 & FATTR4_WORD1_SPACE_TOTAL) {
2626 p = xdr_reserve_space(xdr, 8);
2627 if (!p)
2628 goto out_resource;
2629 dummy64 = (u64)statfs.f_blocks * (u64)statfs.f_bsize;
2630 p = xdr_encode_hyper(p, dummy64);
2631 }
2632 if (bmval1 & FATTR4_WORD1_SPACE_USED) {
2633 p = xdr_reserve_space(xdr, 8);
2634 if (!p)
2635 goto out_resource;
2636 dummy64 = (u64)stat.blocks << 9;
2637 p = xdr_encode_hyper(p, dummy64);
2638 }
2639 if (bmval1 & FATTR4_WORD1_TIME_ACCESS) {
2640 p = xdr_reserve_space(xdr, 12);
2641 if (!p)
2642 goto out_resource;
2643 p = xdr_encode_hyper(p, (s64)stat.atime.tv_sec);
2644 *p++ = cpu_to_be32(stat.atime.tv_nsec);
2645 }
2646 if (bmval1 & FATTR4_WORD1_TIME_DELTA) {
2647 p = xdr_reserve_space(xdr, 12);
2648 if (!p)
2649 goto out_resource;
2650 *p++ = cpu_to_be32(0);
2651 *p++ = cpu_to_be32(1);
2652 *p++ = cpu_to_be32(0);
2653 }
2654 if (bmval1 & FATTR4_WORD1_TIME_METADATA) {
2655 p = xdr_reserve_space(xdr, 12);
2656 if (!p)
2657 goto out_resource;
2658 p = xdr_encode_hyper(p, (s64)stat.ctime.tv_sec);
2659 *p++ = cpu_to_be32(stat.ctime.tv_nsec);
2660 }
2661 if (bmval1 & FATTR4_WORD1_TIME_MODIFY) {
2662 p = xdr_reserve_space(xdr, 12);
2663 if (!p)
2664 goto out_resource;
2665 p = xdr_encode_hyper(p, (s64)stat.mtime.tv_sec);
2666 *p++ = cpu_to_be32(stat.mtime.tv_nsec);
2667 }
2668 if (bmval1 & FATTR4_WORD1_MOUNTED_ON_FILEID) {
2669 p = xdr_reserve_space(xdr, 8);
2670 if (!p)
2671 goto out_resource;
2672 /*
2673 * Get parent's attributes if not ignoring crossmount
2674 * and this is the root of a cross-mounted filesystem.
2675 */
2676 if (ignore_crossmnt == 0 &&
2677 dentry == exp->ex_path.mnt->mnt_root)
2678 get_parent_attributes(exp, &stat);
2679 p = xdr_encode_hyper(p, stat.ino);
2680 }
2681 #ifdef CONFIG_NFSD_PNFS
2682 if ((bmval1 & FATTR4_WORD1_FS_LAYOUT_TYPES) ||
2683 (bmval2 & FATTR4_WORD2_LAYOUT_TYPES)) {
2684 if (exp->ex_layout_type) {
2685 p = xdr_reserve_space(xdr, 8);
2686 if (!p)
2687 goto out_resource;
2688 *p++ = cpu_to_be32(1);
2689 *p++ = cpu_to_be32(exp->ex_layout_type);
2690 } else {
2691 p = xdr_reserve_space(xdr, 4);
2692 if (!p)
2693 goto out_resource;
2694 *p++ = cpu_to_be32(0);
2695 }
2696 }
2697
2698 if (bmval2 & FATTR4_WORD2_LAYOUT_BLKSIZE) {
2699 p = xdr_reserve_space(xdr, 4);
2700 if (!p)
2701 goto out_resource;
2702 *p++ = cpu_to_be32(stat.blksize);
2703 }
2704 #endif /* CONFIG_NFSD_PNFS */
2705 if (bmval2 & FATTR4_WORD2_SECURITY_LABEL) {
2706 status = nfsd4_encode_security_label(xdr, rqstp, context,
2707 contextlen);
2708 if (status)
2709 goto out;
2710 }
2711 if (bmval2 & FATTR4_WORD2_SUPPATTR_EXCLCREAT) {
2712 p = xdr_reserve_space(xdr, 16);
2713 if (!p)
2714 goto out_resource;
2715 *p++ = cpu_to_be32(3);
2716 *p++ = cpu_to_be32(NFSD_SUPPATTR_EXCLCREAT_WORD0);
2717 *p++ = cpu_to_be32(NFSD_SUPPATTR_EXCLCREAT_WORD1);
2718 *p++ = cpu_to_be32(NFSD_SUPPATTR_EXCLCREAT_WORD2);
2719 }
2720
2721 attrlen = htonl(xdr->buf->len - attrlen_offset - 4);
2722 write_bytes_to_xdr_buf(xdr->buf, attrlen_offset, &attrlen, 4);
2723 status = nfs_ok;
2724
2725 out:
2726 #ifdef CONFIG_NFSD_V4_SECURITY_LABEL
2727 if (context)
2728 security_release_secctx(context, contextlen);
2729 #endif /* CONFIG_NFSD_V4_SECURITY_LABEL */
2730 kfree(acl);
2731 if (tempfh) {
2732 fh_put(tempfh);
2733 kfree(tempfh);
2734 }
2735 if (status)
2736 xdr_truncate_encode(xdr, starting_len);
2737 return status;
2738 out_nfserr:
2739 status = nfserrno(err);
2740 goto out;
2741 out_resource:
2742 status = nfserr_resource;
2743 goto out;
2744 }
2745
2746 static void svcxdr_init_encode_from_buffer(struct xdr_stream *xdr,
2747 struct xdr_buf *buf, __be32 *p, int bytes)
2748 {
2749 xdr->scratch.iov_len = 0;
2750 memset(buf, 0, sizeof(struct xdr_buf));
2751 buf->head[0].iov_base = p;
2752 buf->head[0].iov_len = 0;
2753 buf->len = 0;
2754 xdr->buf = buf;
2755 xdr->iov = buf->head;
2756 xdr->p = p;
2757 xdr->end = (void *)p + bytes;
2758 buf->buflen = bytes;
2759 }
2760
2761 __be32 nfsd4_encode_fattr_to_buf(__be32 **p, int words,
2762 struct svc_fh *fhp, struct svc_export *exp,
2763 struct dentry *dentry, u32 *bmval,
2764 struct svc_rqst *rqstp, int ignore_crossmnt)
2765 {
2766 struct xdr_buf dummy;
2767 struct xdr_stream xdr;
2768 __be32 ret;
2769
2770 svcxdr_init_encode_from_buffer(&xdr, &dummy, *p, words << 2);
2771 ret = nfsd4_encode_fattr(&xdr, fhp, exp, dentry, bmval, rqstp,
2772 ignore_crossmnt);
2773 *p = xdr.p;
2774 return ret;
2775 }
2776
2777 static inline int attributes_need_mount(u32 *bmval)
2778 {
2779 if (bmval[0] & ~(FATTR4_WORD0_RDATTR_ERROR | FATTR4_WORD0_LEASE_TIME))
2780 return 1;
2781 if (bmval[1] & ~FATTR4_WORD1_MOUNTED_ON_FILEID)
2782 return 1;
2783 return 0;
2784 }
2785
2786 static __be32
2787 nfsd4_encode_dirent_fattr(struct xdr_stream *xdr, struct nfsd4_readdir *cd,
2788 const char *name, int namlen)
2789 {
2790 struct svc_export *exp = cd->rd_fhp->fh_export;
2791 struct dentry *dentry;
2792 __be32 nfserr;
2793 int ignore_crossmnt = 0;
2794
2795 dentry = lookup_one_len(name, cd->rd_fhp->fh_dentry, namlen);
2796 if (IS_ERR(dentry))
2797 return nfserrno(PTR_ERR(dentry));
2798 if (!dentry->d_inode) {
2799 /*
2800 * nfsd_buffered_readdir drops the i_mutex between
2801 * readdir and calling this callback, leaving a window
2802 * where this directory entry could have gone away.
2803 */
2804 dput(dentry);
2805 return nfserr_noent;
2806 }
2807
2808 exp_get(exp);
2809 /*
2810 * In the case of a mountpoint, the client may be asking for
2811 * attributes that are only properties of the underlying filesystem
2812 * as opposed to the cross-mounted file system. In such a case,
2813 * we will not follow the cross mount and will fill the attribtutes
2814 * directly from the mountpoint dentry.
2815 */
2816 if (nfsd_mountpoint(dentry, exp)) {
2817 int err;
2818
2819 if (!(exp->ex_flags & NFSEXP_V4ROOT)
2820 && !attributes_need_mount(cd->rd_bmval)) {
2821 ignore_crossmnt = 1;
2822 goto out_encode;
2823 }
2824 /*
2825 * Why the heck aren't we just using nfsd_lookup??
2826 * Different "."/".." handling? Something else?
2827 * At least, add a comment here to explain....
2828 */
2829 err = nfsd_cross_mnt(cd->rd_rqstp, &dentry, &exp);
2830 if (err) {
2831 nfserr = nfserrno(err);
2832 goto out_put;
2833 }
2834 nfserr = check_nfsd_access(exp, cd->rd_rqstp);
2835 if (nfserr)
2836 goto out_put;
2837
2838 }
2839 out_encode:
2840 nfserr = nfsd4_encode_fattr(xdr, NULL, exp, dentry, cd->rd_bmval,
2841 cd->rd_rqstp, ignore_crossmnt);
2842 out_put:
2843 dput(dentry);
2844 exp_put(exp);
2845 return nfserr;
2846 }
2847
2848 static __be32 *
2849 nfsd4_encode_rdattr_error(struct xdr_stream *xdr, __be32 nfserr)
2850 {
2851 __be32 *p;
2852
2853 p = xdr_reserve_space(xdr, 20);
2854 if (!p)
2855 return NULL;
2856 *p++ = htonl(2);
2857 *p++ = htonl(FATTR4_WORD0_RDATTR_ERROR); /* bmval0 */
2858 *p++ = htonl(0); /* bmval1 */
2859
2860 *p++ = htonl(4); /* attribute length */
2861 *p++ = nfserr; /* no htonl */
2862 return p;
2863 }
2864
2865 static int
2866 nfsd4_encode_dirent(void *ccdv, const char *name, int namlen,
2867 loff_t offset, u64 ino, unsigned int d_type)
2868 {
2869 struct readdir_cd *ccd = ccdv;
2870 struct nfsd4_readdir *cd = container_of(ccd, struct nfsd4_readdir, common);
2871 struct xdr_stream *xdr = cd->xdr;
2872 int start_offset = xdr->buf->len;
2873 int cookie_offset;
2874 u32 name_and_cookie;
2875 int entry_bytes;
2876 __be32 nfserr = nfserr_toosmall;
2877 __be64 wire_offset;
2878 __be32 *p;
2879
2880 /* In nfsv4, "." and ".." never make it onto the wire.. */
2881 if (name && isdotent(name, namlen)) {
2882 cd->common.err = nfs_ok;
2883 return 0;
2884 }
2885
2886 if (cd->cookie_offset) {
2887 wire_offset = cpu_to_be64(offset);
2888 write_bytes_to_xdr_buf(xdr->buf, cd->cookie_offset,
2889 &wire_offset, 8);
2890 }
2891
2892 p = xdr_reserve_space(xdr, 4);
2893 if (!p)
2894 goto fail;
2895 *p++ = xdr_one; /* mark entry present */
2896 cookie_offset = xdr->buf->len;
2897 p = xdr_reserve_space(xdr, 3*4 + namlen);
2898 if (!p)
2899 goto fail;
2900 p = xdr_encode_hyper(p, NFS_OFFSET_MAX); /* offset of next entry */
2901 p = xdr_encode_array(p, name, namlen); /* name length & name */
2902
2903 nfserr = nfsd4_encode_dirent_fattr(xdr, cd, name, namlen);
2904 switch (nfserr) {
2905 case nfs_ok:
2906 break;
2907 case nfserr_resource:
2908 nfserr = nfserr_toosmall;
2909 goto fail;
2910 case nfserr_noent:
2911 xdr_truncate_encode(xdr, start_offset);
2912 goto skip_entry;
2913 default:
2914 /*
2915 * If the client requested the RDATTR_ERROR attribute,
2916 * we stuff the error code into this attribute
2917 * and continue. If this attribute was not requested,
2918 * then in accordance with the spec, we fail the
2919 * entire READDIR operation(!)
2920 */
2921 if (!(cd->rd_bmval[0] & FATTR4_WORD0_RDATTR_ERROR))
2922 goto fail;
2923 p = nfsd4_encode_rdattr_error(xdr, nfserr);
2924 if (p == NULL) {
2925 nfserr = nfserr_toosmall;
2926 goto fail;
2927 }
2928 }
2929 nfserr = nfserr_toosmall;
2930 entry_bytes = xdr->buf->len - start_offset;
2931 if (entry_bytes > cd->rd_maxcount)
2932 goto fail;
2933 cd->rd_maxcount -= entry_bytes;
2934 /*
2935 * RFC 3530 14.2.24 describes rd_dircount as only a "hint", so
2936 * let's always let through the first entry, at least:
2937 */
2938 if (!cd->rd_dircount)
2939 goto fail;
2940 name_and_cookie = 4 + 4 * XDR_QUADLEN(namlen) + 8;
2941 if (name_and_cookie > cd->rd_dircount && cd->cookie_offset)
2942 goto fail;
2943 cd->rd_dircount -= min(cd->rd_dircount, name_and_cookie);
2944
2945 cd->cookie_offset = cookie_offset;
2946 skip_entry:
2947 cd->common.err = nfs_ok;
2948 return 0;
2949 fail:
2950 xdr_truncate_encode(xdr, start_offset);
2951 cd->common.err = nfserr;
2952 return -EINVAL;
2953 }
2954
2955 static __be32
2956 nfsd4_encode_stateid(struct xdr_stream *xdr, stateid_t *sid)
2957 {
2958 __be32 *p;
2959
2960 p = xdr_reserve_space(xdr, sizeof(stateid_t));
2961 if (!p)
2962 return nfserr_resource;
2963 *p++ = cpu_to_be32(sid->si_generation);
2964 p = xdr_encode_opaque_fixed(p, &sid->si_opaque,
2965 sizeof(stateid_opaque_t));
2966 return 0;
2967 }
2968
2969 static __be32
2970 nfsd4_encode_access(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_access *access)
2971 {
2972 struct xdr_stream *xdr = &resp->xdr;
2973 __be32 *p;
2974
2975 if (!nfserr) {
2976 p = xdr_reserve_space(xdr, 8);
2977 if (!p)
2978 return nfserr_resource;
2979 *p++ = cpu_to_be32(access->ac_supported);
2980 *p++ = cpu_to_be32(access->ac_resp_access);
2981 }
2982 return nfserr;
2983 }
2984
2985 static __be32 nfsd4_encode_bind_conn_to_session(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_bind_conn_to_session *bcts)
2986 {
2987 struct xdr_stream *xdr = &resp->xdr;
2988 __be32 *p;
2989
2990 if (!nfserr) {
2991 p = xdr_reserve_space(xdr, NFS4_MAX_SESSIONID_LEN + 8);
2992 if (!p)
2993 return nfserr_resource;
2994 p = xdr_encode_opaque_fixed(p, bcts->sessionid.data,
2995 NFS4_MAX_SESSIONID_LEN);
2996 *p++ = cpu_to_be32(bcts->dir);
2997 /* Sorry, we do not yet support RDMA over 4.1: */
2998 *p++ = cpu_to_be32(0);
2999 }
3000 return nfserr;
3001 }
3002
3003 static __be32
3004 nfsd4_encode_close(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_close *close)
3005 {
3006 struct xdr_stream *xdr = &resp->xdr;
3007
3008 if (!nfserr)
3009 nfserr = nfsd4_encode_stateid(xdr, &close->cl_stateid);
3010
3011 return nfserr;
3012 }
3013
3014
3015 static __be32
3016 nfsd4_encode_commit(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_commit *commit)
3017 {
3018 struct xdr_stream *xdr = &resp->xdr;
3019 __be32 *p;
3020
3021 if (!nfserr) {
3022 p = xdr_reserve_space(xdr, NFS4_VERIFIER_SIZE);
3023 if (!p)
3024 return nfserr_resource;
3025 p = xdr_encode_opaque_fixed(p, commit->co_verf.data,
3026 NFS4_VERIFIER_SIZE);
3027 }
3028 return nfserr;
3029 }
3030
3031 static __be32
3032 nfsd4_encode_create(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_create *create)
3033 {
3034 struct xdr_stream *xdr = &resp->xdr;
3035 __be32 *p;
3036
3037 if (!nfserr) {
3038 p = xdr_reserve_space(xdr, 32);
3039 if (!p)
3040 return nfserr_resource;
3041 p = encode_cinfo(p, &create->cr_cinfo);
3042 *p++ = cpu_to_be32(2);
3043 *p++ = cpu_to_be32(create->cr_bmval[0]);
3044 *p++ = cpu_to_be32(create->cr_bmval[1]);
3045 }
3046 return nfserr;
3047 }
3048
3049 static __be32
3050 nfsd4_encode_getattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_getattr *getattr)
3051 {
3052 struct svc_fh *fhp = getattr->ga_fhp;
3053 struct xdr_stream *xdr = &resp->xdr;
3054
3055 if (nfserr)
3056 return nfserr;
3057
3058 nfserr = nfsd4_encode_fattr(xdr, fhp, fhp->fh_export, fhp->fh_dentry,
3059 getattr->ga_bmval,
3060 resp->rqstp, 0);
3061 return nfserr;
3062 }
3063
3064 static __be32
3065 nfsd4_encode_getfh(struct nfsd4_compoundres *resp, __be32 nfserr, struct svc_fh **fhpp)
3066 {
3067 struct xdr_stream *xdr = &resp->xdr;
3068 struct svc_fh *fhp = *fhpp;
3069 unsigned int len;
3070 __be32 *p;
3071
3072 if (!nfserr) {
3073 len = fhp->fh_handle.fh_size;
3074 p = xdr_reserve_space(xdr, len + 4);
3075 if (!p)
3076 return nfserr_resource;
3077 p = xdr_encode_opaque(p, &fhp->fh_handle.fh_base, len);
3078 }
3079 return nfserr;
3080 }
3081
3082 /*
3083 * Including all fields other than the name, a LOCK4denied structure requires
3084 * 8(clientid) + 4(namelen) + 8(offset) + 8(length) + 4(type) = 32 bytes.
3085 */
3086 static __be32
3087 nfsd4_encode_lock_denied(struct xdr_stream *xdr, struct nfsd4_lock_denied *ld)
3088 {
3089 struct xdr_netobj *conf = &ld->ld_owner;
3090 __be32 *p;
3091
3092 again:
3093 p = xdr_reserve_space(xdr, 32 + XDR_LEN(conf->len));
3094 if (!p) {
3095 /*
3096 * Don't fail to return the result just because we can't
3097 * return the conflicting open:
3098 */
3099 if (conf->len) {
3100 kfree(conf->data);
3101 conf->len = 0;
3102 conf->data = NULL;
3103 goto again;
3104 }
3105 return nfserr_resource;
3106 }
3107 p = xdr_encode_hyper(p, ld->ld_start);
3108 p = xdr_encode_hyper(p, ld->ld_length);
3109 *p++ = cpu_to_be32(ld->ld_type);
3110 if (conf->len) {
3111 p = xdr_encode_opaque_fixed(p, &ld->ld_clientid, 8);
3112 p = xdr_encode_opaque(p, conf->data, conf->len);
3113 kfree(conf->data);
3114 } else { /* non - nfsv4 lock in conflict, no clientid nor owner */
3115 p = xdr_encode_hyper(p, (u64)0); /* clientid */
3116 *p++ = cpu_to_be32(0); /* length of owner name */
3117 }
3118 return nfserr_denied;
3119 }
3120
3121 static __be32
3122 nfsd4_encode_lock(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lock *lock)
3123 {
3124 struct xdr_stream *xdr = &resp->xdr;
3125
3126 if (!nfserr)
3127 nfserr = nfsd4_encode_stateid(xdr, &lock->lk_resp_stateid);
3128 else if (nfserr == nfserr_denied)
3129 nfserr = nfsd4_encode_lock_denied(xdr, &lock->lk_denied);
3130
3131 return nfserr;
3132 }
3133
3134 static __be32
3135 nfsd4_encode_lockt(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lockt *lockt)
3136 {
3137 struct xdr_stream *xdr = &resp->xdr;
3138
3139 if (nfserr == nfserr_denied)
3140 nfsd4_encode_lock_denied(xdr, &lockt->lt_denied);
3141 return nfserr;
3142 }
3143
3144 static __be32
3145 nfsd4_encode_locku(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_locku *locku)
3146 {
3147 struct xdr_stream *xdr = &resp->xdr;
3148
3149 if (!nfserr)
3150 nfserr = nfsd4_encode_stateid(xdr, &locku->lu_stateid);
3151
3152 return nfserr;
3153 }
3154
3155
3156 static __be32
3157 nfsd4_encode_link(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_link *link)
3158 {
3159 struct xdr_stream *xdr = &resp->xdr;
3160 __be32 *p;
3161
3162 if (!nfserr) {
3163 p = xdr_reserve_space(xdr, 20);
3164 if (!p)
3165 return nfserr_resource;
3166 p = encode_cinfo(p, &link->li_cinfo);
3167 }
3168 return nfserr;
3169 }
3170
3171
3172 static __be32
3173 nfsd4_encode_open(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open *open)
3174 {
3175 struct xdr_stream *xdr = &resp->xdr;
3176 __be32 *p;
3177
3178 if (nfserr)
3179 goto out;
3180
3181 nfserr = nfsd4_encode_stateid(xdr, &open->op_stateid);
3182 if (nfserr)
3183 goto out;
3184 p = xdr_reserve_space(xdr, 40);
3185 if (!p)
3186 return nfserr_resource;
3187 p = encode_cinfo(p, &open->op_cinfo);
3188 *p++ = cpu_to_be32(open->op_rflags);
3189 *p++ = cpu_to_be32(2);
3190 *p++ = cpu_to_be32(open->op_bmval[0]);
3191 *p++ = cpu_to_be32(open->op_bmval[1]);
3192 *p++ = cpu_to_be32(open->op_delegate_type);
3193
3194 switch (open->op_delegate_type) {
3195 case NFS4_OPEN_DELEGATE_NONE:
3196 break;
3197 case NFS4_OPEN_DELEGATE_READ:
3198 nfserr = nfsd4_encode_stateid(xdr, &open->op_delegate_stateid);
3199 if (nfserr)
3200 return nfserr;
3201 p = xdr_reserve_space(xdr, 20);
3202 if (!p)
3203 return nfserr_resource;
3204 *p++ = cpu_to_be32(open->op_recall);
3205
3206 /*
3207 * TODO: ACE's in delegations
3208 */
3209 *p++ = cpu_to_be32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
3210 *p++ = cpu_to_be32(0);
3211 *p++ = cpu_to_be32(0);
3212 *p++ = cpu_to_be32(0); /* XXX: is NULL principal ok? */
3213 break;
3214 case NFS4_OPEN_DELEGATE_WRITE:
3215 nfserr = nfsd4_encode_stateid(xdr, &open->op_delegate_stateid);
3216 if (nfserr)
3217 return nfserr;
3218 p = xdr_reserve_space(xdr, 32);
3219 if (!p)
3220 return nfserr_resource;
3221 *p++ = cpu_to_be32(0);
3222
3223 /*
3224 * TODO: space_limit's in delegations
3225 */
3226 *p++ = cpu_to_be32(NFS4_LIMIT_SIZE);
3227 *p++ = cpu_to_be32(~(u32)0);
3228 *p++ = cpu_to_be32(~(u32)0);
3229
3230 /*
3231 * TODO: ACE's in delegations
3232 */
3233 *p++ = cpu_to_be32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
3234 *p++ = cpu_to_be32(0);
3235 *p++ = cpu_to_be32(0);
3236 *p++ = cpu_to_be32(0); /* XXX: is NULL principal ok? */
3237 break;
3238 case NFS4_OPEN_DELEGATE_NONE_EXT: /* 4.1 */
3239 switch (open->op_why_no_deleg) {
3240 case WND4_CONTENTION:
3241 case WND4_RESOURCE:
3242 p = xdr_reserve_space(xdr, 8);
3243 if (!p)
3244 return nfserr_resource;
3245 *p++ = cpu_to_be32(open->op_why_no_deleg);
3246 /* deleg signaling not supported yet: */
3247 *p++ = cpu_to_be32(0);
3248 break;
3249 default:
3250 p = xdr_reserve_space(xdr, 4);
3251 if (!p)
3252 return nfserr_resource;
3253 *p++ = cpu_to_be32(open->op_why_no_deleg);
3254 }
3255 break;
3256 default:
3257 BUG();
3258 }
3259 /* XXX save filehandle here */
3260 out:
3261 return nfserr;
3262 }
3263
3264 static __be32
3265 nfsd4_encode_open_confirm(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_confirm *oc)
3266 {
3267 struct xdr_stream *xdr = &resp->xdr;
3268
3269 if (!nfserr)
3270 nfserr = nfsd4_encode_stateid(xdr, &oc->oc_resp_stateid);
3271
3272 return nfserr;
3273 }
3274
3275 static __be32
3276 nfsd4_encode_open_downgrade(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_downgrade *od)
3277 {
3278 struct xdr_stream *xdr = &resp->xdr;
3279
3280 if (!nfserr)
3281 nfserr = nfsd4_encode_stateid(xdr, &od->od_stateid);
3282
3283 return nfserr;
3284 }
3285
3286 static __be32 nfsd4_encode_splice_read(
3287 struct nfsd4_compoundres *resp,
3288 struct nfsd4_read *read,
3289 struct file *file, unsigned long maxcount)
3290 {
3291 struct xdr_stream *xdr = &resp->xdr;
3292 struct xdr_buf *buf = xdr->buf;
3293 u32 eof;
3294 int space_left;
3295 __be32 nfserr;
3296 __be32 *p = xdr->p - 2;
3297
3298 /* Make sure there will be room for padding if needed */
3299 if (xdr->end - xdr->p < 1)
3300 return nfserr_resource;
3301
3302 nfserr = nfsd_splice_read(read->rd_rqstp, file,
3303 read->rd_offset, &maxcount);
3304 if (nfserr) {
3305 /*
3306 * nfsd_splice_actor may have already messed with the
3307 * page length; reset it so as not to confuse
3308 * xdr_truncate_encode:
3309 */
3310 buf->page_len = 0;
3311 return nfserr;
3312 }
3313
3314 eof = (read->rd_offset + maxcount >=
3315 read->rd_fhp->fh_dentry->d_inode->i_size);
3316
3317 *(p++) = htonl(eof);
3318 *(p++) = htonl(maxcount);
3319
3320 buf->page_len = maxcount;
3321 buf->len += maxcount;
3322 xdr->page_ptr += (buf->page_base + maxcount + PAGE_SIZE - 1)
3323 / PAGE_SIZE;
3324
3325 /* Use rest of head for padding and remaining ops: */
3326 buf->tail[0].iov_base = xdr->p;
3327 buf->tail[0].iov_len = 0;
3328 xdr->iov = buf->tail;
3329 if (maxcount&3) {
3330 int pad = 4 - (maxcount&3);
3331
3332 *(xdr->p++) = 0;
3333
3334 buf->tail[0].iov_base += maxcount&3;
3335 buf->tail[0].iov_len = pad;
3336 buf->len += pad;
3337 }
3338
3339 space_left = min_t(int, (void *)xdr->end - (void *)xdr->p,
3340 buf->buflen - buf->len);
3341 buf->buflen = buf->len + space_left;
3342 xdr->end = (__be32 *)((void *)xdr->end + space_left);
3343
3344 return 0;
3345 }
3346
3347 static __be32 nfsd4_encode_readv(struct nfsd4_compoundres *resp,
3348 struct nfsd4_read *read,
3349 struct file *file, unsigned long maxcount)
3350 {
3351 struct xdr_stream *xdr = &resp->xdr;
3352 u32 eof;
3353 int v;
3354 int starting_len = xdr->buf->len - 8;
3355 long len;
3356 int thislen;
3357 __be32 nfserr;
3358 __be32 tmp;
3359 __be32 *p;
3360 u32 zzz = 0;
3361 int pad;
3362
3363 len = maxcount;
3364 v = 0;
3365
3366 thislen = min_t(long, len, ((void *)xdr->end - (void *)xdr->p));
3367 p = xdr_reserve_space(xdr, (thislen+3)&~3);
3368 WARN_ON_ONCE(!p);
3369 resp->rqstp->rq_vec[v].iov_base = p;
3370 resp->rqstp->rq_vec[v].iov_len = thislen;
3371 v++;
3372 len -= thislen;
3373
3374 while (len) {
3375 thislen = min_t(long, len, PAGE_SIZE);
3376 p = xdr_reserve_space(xdr, (thislen+3)&~3);
3377 WARN_ON_ONCE(!p);
3378 resp->rqstp->rq_vec[v].iov_base = p;
3379 resp->rqstp->rq_vec[v].iov_len = thislen;
3380 v++;
3381 len -= thislen;
3382 }
3383 read->rd_vlen = v;
3384
3385 nfserr = nfsd_readv(file, read->rd_offset, resp->rqstp->rq_vec,
3386 read->rd_vlen, &maxcount);
3387 if (nfserr)
3388 return nfserr;
3389 xdr_truncate_encode(xdr, starting_len + 8 + ((maxcount+3)&~3));
3390
3391 eof = (read->rd_offset + maxcount >=
3392 read->rd_fhp->fh_dentry->d_inode->i_size);
3393
3394 tmp = htonl(eof);
3395 write_bytes_to_xdr_buf(xdr->buf, starting_len , &tmp, 4);
3396 tmp = htonl(maxcount);
3397 write_bytes_to_xdr_buf(xdr->buf, starting_len + 4, &tmp, 4);
3398
3399 pad = (maxcount&3) ? 4 - (maxcount&3) : 0;
3400 write_bytes_to_xdr_buf(xdr->buf, starting_len + 8 + maxcount,
3401 &zzz, pad);
3402 return 0;
3403
3404 }
3405
3406 static __be32
3407 nfsd4_encode_read(struct nfsd4_compoundres *resp, __be32 nfserr,
3408 struct nfsd4_read *read)
3409 {
3410 unsigned long maxcount;
3411 struct xdr_stream *xdr = &resp->xdr;
3412 struct file *file = read->rd_filp;
3413 int starting_len = xdr->buf->len;
3414 struct raparms *ra;
3415 __be32 *p;
3416 __be32 err;
3417
3418 if (nfserr)
3419 return nfserr;
3420
3421 p = xdr_reserve_space(xdr, 8); /* eof flag and byte count */
3422 if (!p) {
3423 WARN_ON_ONCE(test_bit(RQ_SPLICE_OK, &resp->rqstp->rq_flags));
3424 return nfserr_resource;
3425 }
3426 if (resp->xdr.buf->page_len && test_bit(RQ_SPLICE_OK, &resp->rqstp->rq_flags)) {
3427 WARN_ON_ONCE(1);
3428 return nfserr_resource;
3429 }
3430 xdr_commit_encode(xdr);
3431
3432 maxcount = svc_max_payload(resp->rqstp);
3433 maxcount = min_t(unsigned long, maxcount, (xdr->buf->buflen - xdr->buf->len));
3434 maxcount = min_t(unsigned long, maxcount, read->rd_length);
3435
3436 if (!read->rd_filp) {
3437 err = nfsd_get_tmp_read_open(resp->rqstp, read->rd_fhp,
3438 &file, &ra);
3439 if (err)
3440 goto err_truncate;
3441 }
3442
3443 if (file->f_op->splice_read && test_bit(RQ_SPLICE_OK, &resp->rqstp->rq_flags))
3444 err = nfsd4_encode_splice_read(resp, read, file, maxcount);
3445 else
3446 err = nfsd4_encode_readv(resp, read, file, maxcount);
3447
3448 if (!read->rd_filp)
3449 nfsd_put_tmp_read_open(file, ra);
3450
3451 err_truncate:
3452 if (err)
3453 xdr_truncate_encode(xdr, starting_len);
3454 return err;
3455 }
3456
3457 static __be32
3458 nfsd4_encode_readlink(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readlink *readlink)
3459 {
3460 int maxcount;
3461 __be32 wire_count;
3462 int zero = 0;
3463 struct xdr_stream *xdr = &resp->xdr;
3464 int length_offset = xdr->buf->len;
3465 __be32 *p;
3466
3467 if (nfserr)
3468 return nfserr;
3469
3470 p = xdr_reserve_space(xdr, 4);
3471 if (!p)
3472 return nfserr_resource;
3473 maxcount = PAGE_SIZE;
3474
3475 p = xdr_reserve_space(xdr, maxcount);
3476 if (!p)
3477 return nfserr_resource;
3478 /*
3479 * XXX: By default, the ->readlink() VFS op will truncate symlinks
3480 * if they would overflow the buffer. Is this kosher in NFSv4? If
3481 * not, one easy fix is: if ->readlink() precisely fills the buffer,
3482 * assume that truncation occurred, and return NFS4ERR_RESOURCE.
3483 */
3484 nfserr = nfsd_readlink(readlink->rl_rqstp, readlink->rl_fhp,
3485 (char *)p, &maxcount);
3486 if (nfserr == nfserr_isdir)
3487 nfserr = nfserr_inval;
3488 if (nfserr) {
3489 xdr_truncate_encode(xdr, length_offset);
3490 return nfserr;
3491 }
3492
3493 wire_count = htonl(maxcount);
3494 write_bytes_to_xdr_buf(xdr->buf, length_offset, &wire_count, 4);
3495 xdr_truncate_encode(xdr, length_offset + 4 + ALIGN(maxcount, 4));
3496 if (maxcount & 3)
3497 write_bytes_to_xdr_buf(xdr->buf, length_offset + 4 + maxcount,
3498 &zero, 4 - (maxcount&3));
3499 return 0;
3500 }
3501
3502 static __be32
3503 nfsd4_encode_readdir(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readdir *readdir)
3504 {
3505 int maxcount;
3506 int bytes_left;
3507 loff_t offset;
3508 __be64 wire_offset;
3509 struct xdr_stream *xdr = &resp->xdr;
3510 int starting_len = xdr->buf->len;
3511 __be32 *p;
3512
3513 if (nfserr)
3514 return nfserr;
3515
3516 p = xdr_reserve_space(xdr, NFS4_VERIFIER_SIZE);
3517 if (!p)
3518 return nfserr_resource;
3519
3520 /* XXX: Following NFSv3, we ignore the READDIR verifier for now. */
3521 *p++ = cpu_to_be32(0);
3522 *p++ = cpu_to_be32(0);
3523 resp->xdr.buf->head[0].iov_len = ((char *)resp->xdr.p)
3524 - (char *)resp->xdr.buf->head[0].iov_base;
3525
3526 /*
3527 * Number of bytes left for directory entries allowing for the
3528 * final 8 bytes of the readdir and a following failed op:
3529 */
3530 bytes_left = xdr->buf->buflen - xdr->buf->len
3531 - COMPOUND_ERR_SLACK_SPACE - 8;
3532 if (bytes_left < 0) {
3533 nfserr = nfserr_resource;
3534 goto err_no_verf;
3535 }
3536 maxcount = min_t(u32, readdir->rd_maxcount, INT_MAX);
3537 /*
3538 * Note the rfc defines rd_maxcount as the size of the
3539 * READDIR4resok structure, which includes the verifier above
3540 * and the 8 bytes encoded at the end of this function:
3541 */
3542 if (maxcount < 16) {
3543 nfserr = nfserr_toosmall;
3544 goto err_no_verf;
3545 }
3546 maxcount = min_t(int, maxcount-16, bytes_left);
3547
3548 /* RFC 3530 14.2.24 allows us to ignore dircount when it's 0: */
3549 if (!readdir->rd_dircount)
3550 readdir->rd_dircount = INT_MAX;
3551
3552 readdir->xdr = xdr;
3553 readdir->rd_maxcount = maxcount;
3554 readdir->common.err = 0;
3555 readdir->cookie_offset = 0;
3556
3557 offset = readdir->rd_cookie;
3558 nfserr = nfsd_readdir(readdir->rd_rqstp, readdir->rd_fhp,
3559 &offset,
3560 &readdir->common, nfsd4_encode_dirent);
3561 if (nfserr == nfs_ok &&
3562 readdir->common.err == nfserr_toosmall &&
3563 xdr->buf->len == starting_len + 8) {
3564 /* nothing encoded; which limit did we hit?: */
3565 if (maxcount - 16 < bytes_left)
3566 /* It was the fault of rd_maxcount: */
3567 nfserr = nfserr_toosmall;
3568 else
3569 /* We ran out of buffer space: */
3570 nfserr = nfserr_resource;
3571 }
3572 if (nfserr)
3573 goto err_no_verf;
3574
3575 if (readdir->cookie_offset) {
3576 wire_offset = cpu_to_be64(offset);
3577 write_bytes_to_xdr_buf(xdr->buf, readdir->cookie_offset,
3578 &wire_offset, 8);
3579 }
3580
3581 p = xdr_reserve_space(xdr, 8);
3582 if (!p) {
3583 WARN_ON_ONCE(1);
3584 goto err_no_verf;
3585 }
3586 *p++ = 0; /* no more entries */
3587 *p++ = htonl(readdir->common.err == nfserr_eof);
3588
3589 return 0;
3590 err_no_verf:
3591 xdr_truncate_encode(xdr, starting_len);
3592 return nfserr;
3593 }
3594
3595 static __be32
3596 nfsd4_encode_remove(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_remove *remove)
3597 {
3598 struct xdr_stream *xdr = &resp->xdr;
3599 __be32 *p;
3600
3601 if (!nfserr) {
3602 p = xdr_reserve_space(xdr, 20);
3603 if (!p)
3604 return nfserr_resource;
3605 p = encode_cinfo(p, &remove->rm_cinfo);
3606 }
3607 return nfserr;
3608 }
3609
3610 static __be32
3611 nfsd4_encode_rename(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_rename *rename)
3612 {
3613 struct xdr_stream *xdr = &resp->xdr;
3614 __be32 *p;
3615
3616 if (!nfserr) {
3617 p = xdr_reserve_space(xdr, 40);
3618 if (!p)
3619 return nfserr_resource;
3620 p = encode_cinfo(p, &rename->rn_sinfo);
3621 p = encode_cinfo(p, &rename->rn_tinfo);
3622 }
3623 return nfserr;
3624 }
3625
3626 static __be32
3627 nfsd4_do_encode_secinfo(struct xdr_stream *xdr,
3628 __be32 nfserr, struct svc_export *exp)
3629 {
3630 u32 i, nflavs, supported;
3631 struct exp_flavor_info *flavs;
3632 struct exp_flavor_info def_flavs[2];
3633 __be32 *p, *flavorsp;
3634 static bool report = true;
3635
3636 if (nfserr)
3637 goto out;
3638 nfserr = nfserr_resource;
3639 if (exp->ex_nflavors) {
3640 flavs = exp->ex_flavors;
3641 nflavs = exp->ex_nflavors;
3642 } else { /* Handling of some defaults in absence of real secinfo: */
3643 flavs = def_flavs;
3644 if (exp->ex_client->flavour->flavour == RPC_AUTH_UNIX) {
3645 nflavs = 2;
3646 flavs[0].pseudoflavor = RPC_AUTH_UNIX;
3647 flavs[1].pseudoflavor = RPC_AUTH_NULL;
3648 } else if (exp->ex_client->flavour->flavour == RPC_AUTH_GSS) {
3649 nflavs = 1;
3650 flavs[0].pseudoflavor
3651 = svcauth_gss_flavor(exp->ex_client);
3652 } else {
3653 nflavs = 1;
3654 flavs[0].pseudoflavor
3655 = exp->ex_client->flavour->flavour;
3656 }
3657 }
3658
3659 supported = 0;
3660 p = xdr_reserve_space(xdr, 4);
3661 if (!p)
3662 goto out;
3663 flavorsp = p++; /* to be backfilled later */
3664
3665 for (i = 0; i < nflavs; i++) {
3666 rpc_authflavor_t pf = flavs[i].pseudoflavor;
3667 struct rpcsec_gss_info info;
3668
3669 if (rpcauth_get_gssinfo(pf, &info) == 0) {
3670 supported++;
3671 p = xdr_reserve_space(xdr, 4 + 4 +
3672 XDR_LEN(info.oid.len) + 4 + 4);
3673 if (!p)
3674 goto out;
3675 *p++ = cpu_to_be32(RPC_AUTH_GSS);
3676 p = xdr_encode_opaque(p, info.oid.data, info.oid.len);
3677 *p++ = cpu_to_be32(info.qop);
3678 *p++ = cpu_to_be32(info.service);
3679 } else if (pf < RPC_AUTH_MAXFLAVOR) {
3680 supported++;
3681 p = xdr_reserve_space(xdr, 4);
3682 if (!p)
3683 goto out;
3684 *p++ = cpu_to_be32(pf);
3685 } else {
3686 if (report)
3687 pr_warn("NFS: SECINFO: security flavor %u "
3688 "is not supported\n", pf);
3689 }
3690 }
3691
3692 if (nflavs != supported)
3693 report = false;
3694 *flavorsp = htonl(supported);
3695 nfserr = 0;
3696 out:
3697 if (exp)
3698 exp_put(exp);
3699 return nfserr;
3700 }
3701
3702 static __be32
3703 nfsd4_encode_secinfo(struct nfsd4_compoundres *resp, __be32 nfserr,
3704 struct nfsd4_secinfo *secinfo)
3705 {
3706 struct xdr_stream *xdr = &resp->xdr;
3707
3708 return nfsd4_do_encode_secinfo(xdr, nfserr, secinfo->si_exp);
3709 }
3710
3711 static __be32
3712 nfsd4_encode_secinfo_no_name(struct nfsd4_compoundres *resp, __be32 nfserr,
3713 struct nfsd4_secinfo_no_name *secinfo)
3714 {
3715 struct xdr_stream *xdr = &resp->xdr;
3716
3717 return nfsd4_do_encode_secinfo(xdr, nfserr, secinfo->sin_exp);
3718 }
3719
3720 /*
3721 * The SETATTR encode routine is special -- it always encodes a bitmap,
3722 * regardless of the error status.
3723 */
3724 static __be32
3725 nfsd4_encode_setattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setattr *setattr)
3726 {
3727 struct xdr_stream *xdr = &resp->xdr;
3728 __be32 *p;
3729
3730 p = xdr_reserve_space(xdr, 16);
3731 if (!p)
3732 return nfserr_resource;
3733 if (nfserr) {
3734 *p++ = cpu_to_be32(3);
3735 *p++ = cpu_to_be32(0);
3736 *p++ = cpu_to_be32(0);
3737 *p++ = cpu_to_be32(0);
3738 }
3739 else {
3740 *p++ = cpu_to_be32(3);
3741 *p++ = cpu_to_be32(setattr->sa_bmval[0]);
3742 *p++ = cpu_to_be32(setattr->sa_bmval[1]);
3743 *p++ = cpu_to_be32(setattr->sa_bmval[2]);
3744 }
3745 return nfserr;
3746 }
3747
3748 static __be32
3749 nfsd4_encode_setclientid(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setclientid *scd)
3750 {
3751 struct xdr_stream *xdr = &resp->xdr;
3752 __be32 *p;
3753
3754 if (!nfserr) {
3755 p = xdr_reserve_space(xdr, 8 + NFS4_VERIFIER_SIZE);
3756 if (!p)
3757 return nfserr_resource;
3758 p = xdr_encode_opaque_fixed(p, &scd->se_clientid, 8);
3759 p = xdr_encode_opaque_fixed(p, &scd->se_confirm,
3760 NFS4_VERIFIER_SIZE);
3761 }
3762 else if (nfserr == nfserr_clid_inuse) {
3763 p = xdr_reserve_space(xdr, 8);
3764 if (!p)
3765 return nfserr_resource;
3766 *p++ = cpu_to_be32(0);
3767 *p++ = cpu_to_be32(0);
3768 }
3769 return nfserr;
3770 }
3771
3772 static __be32
3773 nfsd4_encode_write(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_write *write)
3774 {
3775 struct xdr_stream *xdr = &resp->xdr;
3776 __be32 *p;
3777
3778 if (!nfserr) {
3779 p = xdr_reserve_space(xdr, 16);
3780 if (!p)
3781 return nfserr_resource;
3782 *p++ = cpu_to_be32(write->wr_bytes_written);
3783 *p++ = cpu_to_be32(write->wr_how_written);
3784 p = xdr_encode_opaque_fixed(p, write->wr_verifier.data,
3785 NFS4_VERIFIER_SIZE);
3786 }
3787 return nfserr;
3788 }
3789
3790 static const u32 nfs4_minimal_spo_must_enforce[2] = {
3791 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) |
3792 1 << (OP_EXCHANGE_ID - 32) |
3793 1 << (OP_CREATE_SESSION - 32) |
3794 1 << (OP_DESTROY_SESSION - 32) |
3795 1 << (OP_DESTROY_CLIENTID - 32)
3796 };
3797
3798 static __be32
3799 nfsd4_encode_exchange_id(struct nfsd4_compoundres *resp, __be32 nfserr,
3800 struct nfsd4_exchange_id *exid)
3801 {
3802 struct xdr_stream *xdr = &resp->xdr;
3803 __be32 *p;
3804 char *major_id;
3805 char *server_scope;
3806 int major_id_sz;
3807 int server_scope_sz;
3808 uint64_t minor_id = 0;
3809
3810 if (nfserr)
3811 return nfserr;
3812
3813 major_id = utsname()->nodename;
3814 major_id_sz = strlen(major_id);
3815 server_scope = utsname()->nodename;
3816 server_scope_sz = strlen(server_scope);
3817
3818 p = xdr_reserve_space(xdr,
3819 8 /* eir_clientid */ +
3820 4 /* eir_sequenceid */ +
3821 4 /* eir_flags */ +
3822 4 /* spr_how */);
3823 if (!p)
3824 return nfserr_resource;
3825
3826 p = xdr_encode_opaque_fixed(p, &exid->clientid, 8);
3827 *p++ = cpu_to_be32(exid->seqid);
3828 *p++ = cpu_to_be32(exid->flags);
3829
3830 *p++ = cpu_to_be32(exid->spa_how);
3831
3832 switch (exid->spa_how) {
3833 case SP4_NONE:
3834 break;
3835 case SP4_MACH_CRED:
3836 /* spo_must_enforce, spo_must_allow */
3837 p = xdr_reserve_space(xdr, 16);
3838 if (!p)
3839 return nfserr_resource;
3840
3841 /* spo_must_enforce bitmap: */
3842 *p++ = cpu_to_be32(2);
3843 *p++ = cpu_to_be32(nfs4_minimal_spo_must_enforce[0]);
3844 *p++ = cpu_to_be32(nfs4_minimal_spo_must_enforce[1]);
3845 /* empty spo_must_allow bitmap: */
3846 *p++ = cpu_to_be32(0);
3847
3848 break;
3849 default:
3850 WARN_ON_ONCE(1);
3851 }
3852
3853 p = xdr_reserve_space(xdr,
3854 8 /* so_minor_id */ +
3855 4 /* so_major_id.len */ +
3856 (XDR_QUADLEN(major_id_sz) * 4) +
3857 4 /* eir_server_scope.len */ +
3858 (XDR_QUADLEN(server_scope_sz) * 4) +
3859 4 /* eir_server_impl_id.count (0) */);
3860 if (!p)
3861 return nfserr_resource;
3862
3863 /* The server_owner struct */
3864 p = xdr_encode_hyper(p, minor_id); /* Minor id */
3865 /* major id */
3866 p = xdr_encode_opaque(p, major_id, major_id_sz);
3867
3868 /* Server scope */
3869 p = xdr_encode_opaque(p, server_scope, server_scope_sz);
3870
3871 /* Implementation id */
3872 *p++ = cpu_to_be32(0); /* zero length nfs_impl_id4 array */
3873 return 0;
3874 }
3875
3876 static __be32
3877 nfsd4_encode_create_session(struct nfsd4_compoundres *resp, __be32 nfserr,
3878 struct nfsd4_create_session *sess)
3879 {
3880 struct xdr_stream *xdr = &resp->xdr;
3881 __be32 *p;
3882
3883 if (nfserr)
3884 return nfserr;
3885
3886 p = xdr_reserve_space(xdr, 24);
3887 if (!p)
3888 return nfserr_resource;
3889 p = xdr_encode_opaque_fixed(p, sess->sessionid.data,
3890 NFS4_MAX_SESSIONID_LEN);
3891 *p++ = cpu_to_be32(sess->seqid);
3892 *p++ = cpu_to_be32(sess->flags);
3893
3894 p = xdr_reserve_space(xdr, 28);
3895 if (!p)
3896 return nfserr_resource;
3897 *p++ = cpu_to_be32(0); /* headerpadsz */
3898 *p++ = cpu_to_be32(sess->fore_channel.maxreq_sz);
3899 *p++ = cpu_to_be32(sess->fore_channel.maxresp_sz);
3900 *p++ = cpu_to_be32(sess->fore_channel.maxresp_cached);
3901 *p++ = cpu_to_be32(sess->fore_channel.maxops);
3902 *p++ = cpu_to_be32(sess->fore_channel.maxreqs);
3903 *p++ = cpu_to_be32(sess->fore_channel.nr_rdma_attrs);
3904
3905 if (sess->fore_channel.nr_rdma_attrs) {
3906 p = xdr_reserve_space(xdr, 4);
3907 if (!p)
3908 return nfserr_resource;
3909 *p++ = cpu_to_be32(sess->fore_channel.rdma_attrs);
3910 }
3911
3912 p = xdr_reserve_space(xdr, 28);
3913 if (!p)
3914 return nfserr_resource;
3915 *p++ = cpu_to_be32(0); /* headerpadsz */
3916 *p++ = cpu_to_be32(sess->back_channel.maxreq_sz);
3917 *p++ = cpu_to_be32(sess->back_channel.maxresp_sz);
3918 *p++ = cpu_to_be32(sess->back_channel.maxresp_cached);
3919 *p++ = cpu_to_be32(sess->back_channel.maxops);
3920 *p++ = cpu_to_be32(sess->back_channel.maxreqs);
3921 *p++ = cpu_to_be32(sess->back_channel.nr_rdma_attrs);
3922
3923 if (sess->back_channel.nr_rdma_attrs) {
3924 p = xdr_reserve_space(xdr, 4);
3925 if (!p)
3926 return nfserr_resource;
3927 *p++ = cpu_to_be32(sess->back_channel.rdma_attrs);
3928 }
3929 return 0;
3930 }
3931
3932 static __be32
3933 nfsd4_encode_sequence(struct nfsd4_compoundres *resp, __be32 nfserr,
3934 struct nfsd4_sequence *seq)
3935 {
3936 struct xdr_stream *xdr = &resp->xdr;
3937 __be32 *p;
3938
3939 if (nfserr)
3940 return nfserr;
3941
3942 p = xdr_reserve_space(xdr, NFS4_MAX_SESSIONID_LEN + 20);
3943 if (!p)
3944 return nfserr_resource;
3945 p = xdr_encode_opaque_fixed(p, seq->sessionid.data,
3946 NFS4_MAX_SESSIONID_LEN);
3947 *p++ = cpu_to_be32(seq->seqid);
3948 *p++ = cpu_to_be32(seq->slotid);
3949 /* Note slotid's are numbered from zero: */
3950 *p++ = cpu_to_be32(seq->maxslots - 1); /* sr_highest_slotid */
3951 *p++ = cpu_to_be32(seq->maxslots - 1); /* sr_target_highest_slotid */
3952 *p++ = cpu_to_be32(seq->status_flags);
3953
3954 resp->cstate.data_offset = xdr->buf->len; /* DRC cache data pointer */
3955 return 0;
3956 }
3957
3958 static __be32
3959 nfsd4_encode_test_stateid(struct nfsd4_compoundres *resp, __be32 nfserr,
3960 struct nfsd4_test_stateid *test_stateid)
3961 {
3962 struct xdr_stream *xdr = &resp->xdr;
3963 struct nfsd4_test_stateid_id *stateid, *next;
3964 __be32 *p;
3965
3966 if (nfserr)
3967 return nfserr;
3968
3969 p = xdr_reserve_space(xdr, 4 + (4 * test_stateid->ts_num_ids));
3970 if (!p)
3971 return nfserr_resource;
3972 *p++ = htonl(test_stateid->ts_num_ids);
3973
3974 list_for_each_entry_safe(stateid, next, &test_stateid->ts_stateid_list, ts_id_list) {
3975 *p++ = stateid->ts_id_status;
3976 }
3977
3978 return nfserr;
3979 }
3980
3981 #ifdef CONFIG_NFSD_PNFS
3982 static __be32
3983 nfsd4_encode_getdeviceinfo(struct nfsd4_compoundres *resp, __be32 nfserr,
3984 struct nfsd4_getdeviceinfo *gdev)
3985 {
3986 struct xdr_stream *xdr = &resp->xdr;
3987 const struct nfsd4_layout_ops *ops =
3988 nfsd4_layout_ops[gdev->gd_layout_type];
3989 u32 starting_len = xdr->buf->len, needed_len;
3990 __be32 *p;
3991
3992 dprintk("%s: err %d\n", __func__, nfserr);
3993 if (nfserr)
3994 goto out;
3995
3996 nfserr = nfserr_resource;
3997 p = xdr_reserve_space(xdr, 4);
3998 if (!p)
3999 goto out;
4000
4001 *p++ = cpu_to_be32(gdev->gd_layout_type);
4002
4003 /* If maxcount is 0 then just update notifications */
4004 if (gdev->gd_maxcount != 0) {
4005 nfserr = ops->encode_getdeviceinfo(xdr, gdev);
4006 if (nfserr) {
4007 /*
4008 * We don't bother to burden the layout drivers with
4009 * enforcing gd_maxcount, just tell the client to
4010 * come back with a bigger buffer if it's not enough.
4011 */
4012 if (xdr->buf->len + 4 > gdev->gd_maxcount)
4013 goto toosmall;
4014 goto out;
4015 }
4016 }
4017
4018 nfserr = nfserr_resource;
4019 if (gdev->gd_notify_types) {
4020 p = xdr_reserve_space(xdr, 4 + 4);
4021 if (!p)
4022 goto out;
4023 *p++ = cpu_to_be32(1); /* bitmap length */
4024 *p++ = cpu_to_be32(gdev->gd_notify_types);
4025 } else {
4026 p = xdr_reserve_space(xdr, 4);
4027 if (!p)
4028 goto out;
4029 *p++ = 0;
4030 }
4031
4032 nfserr = 0;
4033 out:
4034 kfree(gdev->gd_device);
4035 dprintk("%s: done: %d\n", __func__, be32_to_cpu(nfserr));
4036 return nfserr;
4037
4038 toosmall:
4039 dprintk("%s: maxcount too small\n", __func__);
4040 needed_len = xdr->buf->len + 4 /* notifications */;
4041 xdr_truncate_encode(xdr, starting_len);
4042 p = xdr_reserve_space(xdr, 4);
4043 if (!p) {
4044 nfserr = nfserr_resource;
4045 } else {
4046 *p++ = cpu_to_be32(needed_len);
4047 nfserr = nfserr_toosmall;
4048 }
4049 goto out;
4050 }
4051
4052 static __be32
4053 nfsd4_encode_layoutget(struct nfsd4_compoundres *resp, __be32 nfserr,
4054 struct nfsd4_layoutget *lgp)
4055 {
4056 struct xdr_stream *xdr = &resp->xdr;
4057 const struct nfsd4_layout_ops *ops =
4058 nfsd4_layout_ops[lgp->lg_layout_type];
4059 __be32 *p;
4060
4061 dprintk("%s: err %d\n", __func__, nfserr);
4062 if (nfserr)
4063 goto out;
4064
4065 nfserr = nfserr_resource;
4066 p = xdr_reserve_space(xdr, 36 + sizeof(stateid_opaque_t));
4067 if (!p)
4068 goto out;
4069
4070 *p++ = cpu_to_be32(1); /* we always set return-on-close */
4071 *p++ = cpu_to_be32(lgp->lg_sid.si_generation);
4072 p = xdr_encode_opaque_fixed(p, &lgp->lg_sid.si_opaque,
4073 sizeof(stateid_opaque_t));
4074
4075 *p++ = cpu_to_be32(1); /* we always return a single layout */
4076 p = xdr_encode_hyper(p, lgp->lg_seg.offset);
4077 p = xdr_encode_hyper(p, lgp->lg_seg.length);
4078 *p++ = cpu_to_be32(lgp->lg_seg.iomode);
4079 *p++ = cpu_to_be32(lgp->lg_layout_type);
4080
4081 nfserr = ops->encode_layoutget(xdr, lgp);
4082 out:
4083 kfree(lgp->lg_content);
4084 return nfserr;
4085 }
4086
4087 static __be32
4088 nfsd4_encode_layoutcommit(struct nfsd4_compoundres *resp, __be32 nfserr,
4089 struct nfsd4_layoutcommit *lcp)
4090 {
4091 struct xdr_stream *xdr = &resp->xdr;
4092 __be32 *p;
4093
4094 if (nfserr)
4095 return nfserr;
4096
4097 p = xdr_reserve_space(xdr, 4);
4098 if (!p)
4099 return nfserr_resource;
4100 *p++ = cpu_to_be32(lcp->lc_size_chg);
4101 if (lcp->lc_size_chg) {
4102 p = xdr_reserve_space(xdr, 8);
4103 if (!p)
4104 return nfserr_resource;
4105 p = xdr_encode_hyper(p, lcp->lc_newsize);
4106 }
4107
4108 return nfs_ok;
4109 }
4110
4111 static __be32
4112 nfsd4_encode_layoutreturn(struct nfsd4_compoundres *resp, __be32 nfserr,
4113 struct nfsd4_layoutreturn *lrp)
4114 {
4115 struct xdr_stream *xdr = &resp->xdr;
4116 __be32 *p;
4117
4118 if (nfserr)
4119 return nfserr;
4120
4121 p = xdr_reserve_space(xdr, 4);
4122 if (!p)
4123 return nfserr_resource;
4124 *p++ = cpu_to_be32(lrp->lrs_present);
4125 if (lrp->lrs_present)
4126 nfsd4_encode_stateid(xdr, &lrp->lr_sid);
4127 return nfs_ok;
4128 }
4129 #endif /* CONFIG_NFSD_PNFS */
4130
4131 static __be32
4132 nfsd4_encode_seek(struct nfsd4_compoundres *resp, __be32 nfserr,
4133 struct nfsd4_seek *seek)
4134 {
4135 __be32 *p;
4136
4137 if (nfserr)
4138 return nfserr;
4139
4140 p = xdr_reserve_space(&resp->xdr, 4 + 8);
4141 *p++ = cpu_to_be32(seek->seek_eof);
4142 p = xdr_encode_hyper(p, seek->seek_pos);
4143
4144 return nfserr;
4145 }
4146
4147 static __be32
4148 nfsd4_encode_noop(struct nfsd4_compoundres *resp, __be32 nfserr, void *p)
4149 {
4150 return nfserr;
4151 }
4152
4153 typedef __be32(* nfsd4_enc)(struct nfsd4_compoundres *, __be32, void *);
4154
4155 /*
4156 * Note: nfsd4_enc_ops vector is shared for v4.0 and v4.1
4157 * since we don't need to filter out obsolete ops as this is
4158 * done in the decoding phase.
4159 */
4160 static nfsd4_enc nfsd4_enc_ops[] = {
4161 [OP_ACCESS] = (nfsd4_enc)nfsd4_encode_access,
4162 [OP_CLOSE] = (nfsd4_enc)nfsd4_encode_close,
4163 [OP_COMMIT] = (nfsd4_enc)nfsd4_encode_commit,
4164 [OP_CREATE] = (nfsd4_enc)nfsd4_encode_create,
4165 [OP_DELEGPURGE] = (nfsd4_enc)nfsd4_encode_noop,
4166 [OP_DELEGRETURN] = (nfsd4_enc)nfsd4_encode_noop,
4167 [OP_GETATTR] = (nfsd4_enc)nfsd4_encode_getattr,
4168 [OP_GETFH] = (nfsd4_enc)nfsd4_encode_getfh,
4169 [OP_LINK] = (nfsd4_enc)nfsd4_encode_link,
4170 [OP_LOCK] = (nfsd4_enc)nfsd4_encode_lock,
4171 [OP_LOCKT] = (nfsd4_enc)nfsd4_encode_lockt,
4172 [OP_LOCKU] = (nfsd4_enc)nfsd4_encode_locku,
4173 [OP_LOOKUP] = (nfsd4_enc)nfsd4_encode_noop,
4174 [OP_LOOKUPP] = (nfsd4_enc)nfsd4_encode_noop,
4175 [OP_NVERIFY] = (nfsd4_enc)nfsd4_encode_noop,
4176 [OP_OPEN] = (nfsd4_enc)nfsd4_encode_open,
4177 [OP_OPENATTR] = (nfsd4_enc)nfsd4_encode_noop,
4178 [OP_OPEN_CONFIRM] = (nfsd4_enc)nfsd4_encode_open_confirm,
4179 [OP_OPEN_DOWNGRADE] = (nfsd4_enc)nfsd4_encode_open_downgrade,
4180 [OP_PUTFH] = (nfsd4_enc)nfsd4_encode_noop,
4181 [OP_PUTPUBFH] = (nfsd4_enc)nfsd4_encode_noop,
4182 [OP_PUTROOTFH] = (nfsd4_enc)nfsd4_encode_noop,
4183 [OP_READ] = (nfsd4_enc)nfsd4_encode_read,
4184 [OP_READDIR] = (nfsd4_enc)nfsd4_encode_readdir,
4185 [OP_READLINK] = (nfsd4_enc)nfsd4_encode_readlink,
4186 [OP_REMOVE] = (nfsd4_enc)nfsd4_encode_remove,
4187 [OP_RENAME] = (nfsd4_enc)nfsd4_encode_rename,
4188 [OP_RENEW] = (nfsd4_enc)nfsd4_encode_noop,
4189 [OP_RESTOREFH] = (nfsd4_enc)nfsd4_encode_noop,
4190 [OP_SAVEFH] = (nfsd4_enc)nfsd4_encode_noop,
4191 [OP_SECINFO] = (nfsd4_enc)nfsd4_encode_secinfo,
4192 [OP_SETATTR] = (nfsd4_enc)nfsd4_encode_setattr,
4193 [OP_SETCLIENTID] = (nfsd4_enc)nfsd4_encode_setclientid,
4194 [OP_SETCLIENTID_CONFIRM] = (nfsd4_enc)nfsd4_encode_noop,
4195 [OP_VERIFY] = (nfsd4_enc)nfsd4_encode_noop,
4196 [OP_WRITE] = (nfsd4_enc)nfsd4_encode_write,
4197 [OP_RELEASE_LOCKOWNER] = (nfsd4_enc)nfsd4_encode_noop,
4198
4199 /* NFSv4.1 operations */
4200 [OP_BACKCHANNEL_CTL] = (nfsd4_enc)nfsd4_encode_noop,
4201 [OP_BIND_CONN_TO_SESSION] = (nfsd4_enc)nfsd4_encode_bind_conn_to_session,
4202 [OP_EXCHANGE_ID] = (nfsd4_enc)nfsd4_encode_exchange_id,
4203 [OP_CREATE_SESSION] = (nfsd4_enc)nfsd4_encode_create_session,
4204 [OP_DESTROY_SESSION] = (nfsd4_enc)nfsd4_encode_noop,
4205 [OP_FREE_STATEID] = (nfsd4_enc)nfsd4_encode_noop,
4206 [OP_GET_DIR_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop,
4207 #ifdef CONFIG_NFSD_PNFS
4208 [OP_GETDEVICEINFO] = (nfsd4_enc)nfsd4_encode_getdeviceinfo,
4209 [OP_GETDEVICELIST] = (nfsd4_enc)nfsd4_encode_noop,
4210 [OP_LAYOUTCOMMIT] = (nfsd4_enc)nfsd4_encode_layoutcommit,
4211 [OP_LAYOUTGET] = (nfsd4_enc)nfsd4_encode_layoutget,
4212 [OP_LAYOUTRETURN] = (nfsd4_enc)nfsd4_encode_layoutreturn,
4213 #else
4214 [OP_GETDEVICEINFO] = (nfsd4_enc)nfsd4_encode_noop,
4215 [OP_GETDEVICELIST] = (nfsd4_enc)nfsd4_encode_noop,
4216 [OP_LAYOUTCOMMIT] = (nfsd4_enc)nfsd4_encode_noop,
4217 [OP_LAYOUTGET] = (nfsd4_enc)nfsd4_encode_noop,
4218 [OP_LAYOUTRETURN] = (nfsd4_enc)nfsd4_encode_noop,
4219 #endif
4220 [OP_SECINFO_NO_NAME] = (nfsd4_enc)nfsd4_encode_secinfo_no_name,
4221 [OP_SEQUENCE] = (nfsd4_enc)nfsd4_encode_sequence,
4222 [OP_SET_SSV] = (nfsd4_enc)nfsd4_encode_noop,
4223 [OP_TEST_STATEID] = (nfsd4_enc)nfsd4_encode_test_stateid,
4224 [OP_WANT_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop,
4225 [OP_DESTROY_CLIENTID] = (nfsd4_enc)nfsd4_encode_noop,
4226 [OP_RECLAIM_COMPLETE] = (nfsd4_enc)nfsd4_encode_noop,
4227
4228 /* NFSv4.2 operations */
4229 [OP_ALLOCATE] = (nfsd4_enc)nfsd4_encode_noop,
4230 [OP_COPY] = (nfsd4_enc)nfsd4_encode_noop,
4231 [OP_COPY_NOTIFY] = (nfsd4_enc)nfsd4_encode_noop,
4232 [OP_DEALLOCATE] = (nfsd4_enc)nfsd4_encode_noop,
4233 [OP_IO_ADVISE] = (nfsd4_enc)nfsd4_encode_noop,
4234 [OP_LAYOUTERROR] = (nfsd4_enc)nfsd4_encode_noop,
4235 [OP_LAYOUTSTATS] = (nfsd4_enc)nfsd4_encode_noop,
4236 [OP_OFFLOAD_CANCEL] = (nfsd4_enc)nfsd4_encode_noop,
4237 [OP_OFFLOAD_STATUS] = (nfsd4_enc)nfsd4_encode_noop,
4238 [OP_READ_PLUS] = (nfsd4_enc)nfsd4_encode_noop,
4239 [OP_SEEK] = (nfsd4_enc)nfsd4_encode_seek,
4240 [OP_WRITE_SAME] = (nfsd4_enc)nfsd4_encode_noop,
4241 };
4242
4243 /*
4244 * Calculate whether we still have space to encode repsize bytes.
4245 * There are two considerations:
4246 * - For NFS versions >=4.1, the size of the reply must stay within
4247 * session limits
4248 * - For all NFS versions, we must stay within limited preallocated
4249 * buffer space.
4250 *
4251 * This is called before the operation is processed, so can only provide
4252 * an upper estimate. For some nonidempotent operations (such as
4253 * getattr), it's not necessarily a problem if that estimate is wrong,
4254 * as we can fail it after processing without significant side effects.
4255 */
4256 __be32 nfsd4_check_resp_size(struct nfsd4_compoundres *resp, u32 respsize)
4257 {
4258 struct xdr_buf *buf = &resp->rqstp->rq_res;
4259 struct nfsd4_slot *slot = resp->cstate.slot;
4260
4261 if (buf->len + respsize <= buf->buflen)
4262 return nfs_ok;
4263 if (!nfsd4_has_session(&resp->cstate))
4264 return nfserr_resource;
4265 if (slot->sl_flags & NFSD4_SLOT_CACHETHIS) {
4266 WARN_ON_ONCE(1);
4267 return nfserr_rep_too_big_to_cache;
4268 }
4269 return nfserr_rep_too_big;
4270 }
4271
4272 void
4273 nfsd4_encode_operation(struct nfsd4_compoundres *resp, struct nfsd4_op *op)
4274 {
4275 struct xdr_stream *xdr = &resp->xdr;
4276 struct nfs4_stateowner *so = resp->cstate.replay_owner;
4277 struct svc_rqst *rqstp = resp->rqstp;
4278 int post_err_offset;
4279 nfsd4_enc encoder;
4280 __be32 *p;
4281
4282 p = xdr_reserve_space(xdr, 8);
4283 if (!p) {
4284 WARN_ON_ONCE(1);
4285 return;
4286 }
4287 *p++ = cpu_to_be32(op->opnum);
4288 post_err_offset = xdr->buf->len;
4289
4290 if (op->opnum == OP_ILLEGAL)
4291 goto status;
4292 BUG_ON(op->opnum < 0 || op->opnum >= ARRAY_SIZE(nfsd4_enc_ops) ||
4293 !nfsd4_enc_ops[op->opnum]);
4294 encoder = nfsd4_enc_ops[op->opnum];
4295 op->status = encoder(resp, op->status, &op->u);
4296 xdr_commit_encode(xdr);
4297
4298 /* nfsd4_check_resp_size guarantees enough room for error status */
4299 if (!op->status) {
4300 int space_needed = 0;
4301 if (!nfsd4_last_compound_op(rqstp))
4302 space_needed = COMPOUND_ERR_SLACK_SPACE;
4303 op->status = nfsd4_check_resp_size(resp, space_needed);
4304 }
4305 if (op->status == nfserr_resource && nfsd4_has_session(&resp->cstate)) {
4306 struct nfsd4_slot *slot = resp->cstate.slot;
4307
4308 if (slot->sl_flags & NFSD4_SLOT_CACHETHIS)
4309 op->status = nfserr_rep_too_big_to_cache;
4310 else
4311 op->status = nfserr_rep_too_big;
4312 }
4313 if (op->status == nfserr_resource ||
4314 op->status == nfserr_rep_too_big ||
4315 op->status == nfserr_rep_too_big_to_cache) {
4316 /*
4317 * The operation may have already been encoded or
4318 * partially encoded. No op returns anything additional
4319 * in the case of one of these three errors, so we can
4320 * just truncate back to after the status. But it's a
4321 * bug if we had to do this on a non-idempotent op:
4322 */
4323 warn_on_nonidempotent_op(op);
4324 xdr_truncate_encode(xdr, post_err_offset);
4325 }
4326 if (so) {
4327 int len = xdr->buf->len - post_err_offset;
4328
4329 so->so_replay.rp_status = op->status;
4330 so->so_replay.rp_buflen = len;
4331 read_bytes_from_xdr_buf(xdr->buf, post_err_offset,
4332 so->so_replay.rp_buf, len);
4333 }
4334 status:
4335 /* Note that op->status is already in network byte order: */
4336 write_bytes_to_xdr_buf(xdr->buf, post_err_offset - 4, &op->status, 4);
4337 }
4338
4339 /*
4340 * Encode the reply stored in the stateowner reply cache
4341 *
4342 * XDR note: do not encode rp->rp_buflen: the buffer contains the
4343 * previously sent already encoded operation.
4344 */
4345 void
4346 nfsd4_encode_replay(struct xdr_stream *xdr, struct nfsd4_op *op)
4347 {
4348 __be32 *p;
4349 struct nfs4_replay *rp = op->replay;
4350
4351 BUG_ON(!rp);
4352
4353 p = xdr_reserve_space(xdr, 8 + rp->rp_buflen);
4354 if (!p) {
4355 WARN_ON_ONCE(1);
4356 return;
4357 }
4358 *p++ = cpu_to_be32(op->opnum);
4359 *p++ = rp->rp_status; /* already xdr'ed */
4360
4361 p = xdr_encode_opaque_fixed(p, rp->rp_buf, rp->rp_buflen);
4362 }
4363
4364 int
4365 nfs4svc_encode_voidres(struct svc_rqst *rqstp, __be32 *p, void *dummy)
4366 {
4367 return xdr_ressize_check(rqstp, p);
4368 }
4369
4370 int nfsd4_release_compoundargs(void *rq, __be32 *p, void *resp)
4371 {
4372 struct svc_rqst *rqstp = rq;
4373 struct nfsd4_compoundargs *args = rqstp->rq_argp;
4374
4375 if (args->ops != args->iops) {
4376 kfree(args->ops);
4377 args->ops = args->iops;
4378 }
4379 kfree(args->tmpp);
4380 args->tmpp = NULL;
4381 while (args->to_free) {
4382 struct svcxdr_tmpbuf *tb = args->to_free;
4383 args->to_free = tb->next;
4384 kfree(tb);
4385 }
4386 return 1;
4387 }
4388
4389 int
4390 nfs4svc_decode_compoundargs(struct svc_rqst *rqstp, __be32 *p, struct nfsd4_compoundargs *args)
4391 {
4392 if (rqstp->rq_arg.head[0].iov_len % 4) {
4393 /* client is nuts */
4394 dprintk("%s: compound not properly padded! (peeraddr=%pISc xid=0x%x)",
4395 __func__, svc_addr(rqstp), be32_to_cpu(rqstp->rq_xid));
4396 return 0;
4397 }
4398 args->p = p;
4399 args->end = rqstp->rq_arg.head[0].iov_base + rqstp->rq_arg.head[0].iov_len;
4400 args->pagelist = rqstp->rq_arg.pages;
4401 args->pagelen = rqstp->rq_arg.page_len;
4402 args->tmpp = NULL;
4403 args->to_free = NULL;
4404 args->ops = args->iops;
4405 args->rqstp = rqstp;
4406
4407 return !nfsd4_decode_compound(args);
4408 }
4409
4410 int
4411 nfs4svc_encode_compoundres(struct svc_rqst *rqstp, __be32 *p, struct nfsd4_compoundres *resp)
4412 {
4413 /*
4414 * All that remains is to write the tag and operation count...
4415 */
4416 struct xdr_buf *buf = resp->xdr.buf;
4417
4418 WARN_ON_ONCE(buf->len != buf->head[0].iov_len + buf->page_len +
4419 buf->tail[0].iov_len);
4420
4421 rqstp->rq_next_page = resp->xdr.page_ptr + 1;
4422
4423 p = resp->tagp;
4424 *p++ = htonl(resp->taglen);
4425 memcpy(p, resp->tag, resp->taglen);
4426 p += XDR_QUADLEN(resp->taglen);
4427 *p++ = htonl(resp->opcnt);
4428
4429 nfsd4_sequence_done(resp);
4430 return 1;
4431 }
4432
4433 /*
4434 * Local variables:
4435 * c-basic-offset: 8
4436 * End:
4437 */
Linux kernel - Deliverables
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