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sched/stat: Expose /proc/pid/schedstat if CONFIG_SCHED_INFO=y
[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 > NFS4_MAXLABELLEN)
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
1566 status = nfsd4_decode_stateid(argp, &lgp->lg_sid);
1567 if (status)
1568 return status;
1569
1570 READ_BUF(4);
1571 lgp->lg_maxcount = be32_to_cpup(p++);
1572
1573 DECODE_TAIL;
1574 }
1575
1576 static __be32
1577 nfsd4_decode_layoutcommit(struct nfsd4_compoundargs *argp,
1578 struct nfsd4_layoutcommit *lcp)
1579 {
1580 DECODE_HEAD;
1581 u32 timechange;
1582
1583 READ_BUF(20);
1584 p = xdr_decode_hyper(p, &lcp->lc_seg.offset);
1585 p = xdr_decode_hyper(p, &lcp->lc_seg.length);
1586 lcp->lc_reclaim = be32_to_cpup(p++);
1587
1588 status = nfsd4_decode_stateid(argp, &lcp->lc_sid);
1589 if (status)
1590 return status;
1591
1592 READ_BUF(4);
1593 lcp->lc_newoffset = be32_to_cpup(p++);
1594 if (lcp->lc_newoffset) {
1595 READ_BUF(8);
1596 p = xdr_decode_hyper(p, &lcp->lc_last_wr);
1597 } else
1598 lcp->lc_last_wr = 0;
1599 READ_BUF(4);
1600 timechange = be32_to_cpup(p++);
1601 if (timechange) {
1602 status = nfsd4_decode_time(argp, &lcp->lc_mtime);
1603 if (status)
1604 return status;
1605 } else {
1606 lcp->lc_mtime.tv_nsec = UTIME_NOW;
1607 }
1608 READ_BUF(8);
1609 lcp->lc_layout_type = be32_to_cpup(p++);
1610
1611 /*
1612 * Save the layout update in XDR format and let the layout driver deal
1613 * with it later.
1614 */
1615 lcp->lc_up_len = be32_to_cpup(p++);
1616 if (lcp->lc_up_len > 0) {
1617 READ_BUF(lcp->lc_up_len);
1618 READMEM(lcp->lc_up_layout, lcp->lc_up_len);
1619 }
1620
1621 DECODE_TAIL;
1622 }
1623
1624 static __be32
1625 nfsd4_decode_layoutreturn(struct nfsd4_compoundargs *argp,
1626 struct nfsd4_layoutreturn *lrp)
1627 {
1628 DECODE_HEAD;
1629
1630 READ_BUF(16);
1631 lrp->lr_reclaim = be32_to_cpup(p++);
1632 lrp->lr_layout_type = be32_to_cpup(p++);
1633 lrp->lr_seg.iomode = be32_to_cpup(p++);
1634 lrp->lr_return_type = be32_to_cpup(p++);
1635 if (lrp->lr_return_type == RETURN_FILE) {
1636 READ_BUF(16);
1637 p = xdr_decode_hyper(p, &lrp->lr_seg.offset);
1638 p = xdr_decode_hyper(p, &lrp->lr_seg.length);
1639
1640 status = nfsd4_decode_stateid(argp, &lrp->lr_sid);
1641 if (status)
1642 return status;
1643
1644 READ_BUF(4);
1645 lrp->lrf_body_len = be32_to_cpup(p++);
1646 if (lrp->lrf_body_len > 0) {
1647 READ_BUF(lrp->lrf_body_len);
1648 READMEM(lrp->lrf_body, lrp->lrf_body_len);
1649 }
1650 } else {
1651 lrp->lr_seg.offset = 0;
1652 lrp->lr_seg.length = NFS4_MAX_UINT64;
1653 }
1654
1655 DECODE_TAIL;
1656 }
1657 #endif /* CONFIG_NFSD_PNFS */
1658
1659 static __be32
1660 nfsd4_decode_fallocate(struct nfsd4_compoundargs *argp,
1661 struct nfsd4_fallocate *fallocate)
1662 {
1663 DECODE_HEAD;
1664
1665 status = nfsd4_decode_stateid(argp, &fallocate->falloc_stateid);
1666 if (status)
1667 return status;
1668
1669 READ_BUF(16);
1670 p = xdr_decode_hyper(p, &fallocate->falloc_offset);
1671 xdr_decode_hyper(p, &fallocate->falloc_length);
1672
1673 DECODE_TAIL;
1674 }
1675
1676 static __be32
1677 nfsd4_decode_seek(struct nfsd4_compoundargs *argp, struct nfsd4_seek *seek)
1678 {
1679 DECODE_HEAD;
1680
1681 status = nfsd4_decode_stateid(argp, &seek->seek_stateid);
1682 if (status)
1683 return status;
1684
1685 READ_BUF(8 + 4);
1686 p = xdr_decode_hyper(p, &seek->seek_offset);
1687 seek->seek_whence = be32_to_cpup(p);
1688
1689 DECODE_TAIL;
1690 }
1691
1692 static __be32
1693 nfsd4_decode_noop(struct nfsd4_compoundargs *argp, void *p)
1694 {
1695 return nfs_ok;
1696 }
1697
1698 static __be32
1699 nfsd4_decode_notsupp(struct nfsd4_compoundargs *argp, void *p)
1700 {
1701 return nfserr_notsupp;
1702 }
1703
1704 typedef __be32(*nfsd4_dec)(struct nfsd4_compoundargs *argp, void *);
1705
1706 static nfsd4_dec nfsd4_dec_ops[] = {
1707 [OP_ACCESS] = (nfsd4_dec)nfsd4_decode_access,
1708 [OP_CLOSE] = (nfsd4_dec)nfsd4_decode_close,
1709 [OP_COMMIT] = (nfsd4_dec)nfsd4_decode_commit,
1710 [OP_CREATE] = (nfsd4_dec)nfsd4_decode_create,
1711 [OP_DELEGPURGE] = (nfsd4_dec)nfsd4_decode_notsupp,
1712 [OP_DELEGRETURN] = (nfsd4_dec)nfsd4_decode_delegreturn,
1713 [OP_GETATTR] = (nfsd4_dec)nfsd4_decode_getattr,
1714 [OP_GETFH] = (nfsd4_dec)nfsd4_decode_noop,
1715 [OP_LINK] = (nfsd4_dec)nfsd4_decode_link,
1716 [OP_LOCK] = (nfsd4_dec)nfsd4_decode_lock,
1717 [OP_LOCKT] = (nfsd4_dec)nfsd4_decode_lockt,
1718 [OP_LOCKU] = (nfsd4_dec)nfsd4_decode_locku,
1719 [OP_LOOKUP] = (nfsd4_dec)nfsd4_decode_lookup,
1720 [OP_LOOKUPP] = (nfsd4_dec)nfsd4_decode_noop,
1721 [OP_NVERIFY] = (nfsd4_dec)nfsd4_decode_verify,
1722 [OP_OPEN] = (nfsd4_dec)nfsd4_decode_open,
1723 [OP_OPENATTR] = (nfsd4_dec)nfsd4_decode_notsupp,
1724 [OP_OPEN_CONFIRM] = (nfsd4_dec)nfsd4_decode_open_confirm,
1725 [OP_OPEN_DOWNGRADE] = (nfsd4_dec)nfsd4_decode_open_downgrade,
1726 [OP_PUTFH] = (nfsd4_dec)nfsd4_decode_putfh,
1727 [OP_PUTPUBFH] = (nfsd4_dec)nfsd4_decode_putpubfh,
1728 [OP_PUTROOTFH] = (nfsd4_dec)nfsd4_decode_noop,
1729 [OP_READ] = (nfsd4_dec)nfsd4_decode_read,
1730 [OP_READDIR] = (nfsd4_dec)nfsd4_decode_readdir,
1731 [OP_READLINK] = (nfsd4_dec)nfsd4_decode_noop,
1732 [OP_REMOVE] = (nfsd4_dec)nfsd4_decode_remove,
1733 [OP_RENAME] = (nfsd4_dec)nfsd4_decode_rename,
1734 [OP_RENEW] = (nfsd4_dec)nfsd4_decode_renew,
1735 [OP_RESTOREFH] = (nfsd4_dec)nfsd4_decode_noop,
1736 [OP_SAVEFH] = (nfsd4_dec)nfsd4_decode_noop,
1737 [OP_SECINFO] = (nfsd4_dec)nfsd4_decode_secinfo,
1738 [OP_SETATTR] = (nfsd4_dec)nfsd4_decode_setattr,
1739 [OP_SETCLIENTID] = (nfsd4_dec)nfsd4_decode_setclientid,
1740 [OP_SETCLIENTID_CONFIRM] = (nfsd4_dec)nfsd4_decode_setclientid_confirm,
1741 [OP_VERIFY] = (nfsd4_dec)nfsd4_decode_verify,
1742 [OP_WRITE] = (nfsd4_dec)nfsd4_decode_write,
1743 [OP_RELEASE_LOCKOWNER] = (nfsd4_dec)nfsd4_decode_release_lockowner,
1744
1745 /* new operations for NFSv4.1 */
1746 [OP_BACKCHANNEL_CTL] = (nfsd4_dec)nfsd4_decode_backchannel_ctl,
1747 [OP_BIND_CONN_TO_SESSION]= (nfsd4_dec)nfsd4_decode_bind_conn_to_session,
1748 [OP_EXCHANGE_ID] = (nfsd4_dec)nfsd4_decode_exchange_id,
1749 [OP_CREATE_SESSION] = (nfsd4_dec)nfsd4_decode_create_session,
1750 [OP_DESTROY_SESSION] = (nfsd4_dec)nfsd4_decode_destroy_session,
1751 [OP_FREE_STATEID] = (nfsd4_dec)nfsd4_decode_free_stateid,
1752 [OP_GET_DIR_DELEGATION] = (nfsd4_dec)nfsd4_decode_notsupp,
1753 #ifdef CONFIG_NFSD_PNFS
1754 [OP_GETDEVICEINFO] = (nfsd4_dec)nfsd4_decode_getdeviceinfo,
1755 [OP_GETDEVICELIST] = (nfsd4_dec)nfsd4_decode_notsupp,
1756 [OP_LAYOUTCOMMIT] = (nfsd4_dec)nfsd4_decode_layoutcommit,
1757 [OP_LAYOUTGET] = (nfsd4_dec)nfsd4_decode_layoutget,
1758 [OP_LAYOUTRETURN] = (nfsd4_dec)nfsd4_decode_layoutreturn,
1759 #else
1760 [OP_GETDEVICEINFO] = (nfsd4_dec)nfsd4_decode_notsupp,
1761 [OP_GETDEVICELIST] = (nfsd4_dec)nfsd4_decode_notsupp,
1762 [OP_LAYOUTCOMMIT] = (nfsd4_dec)nfsd4_decode_notsupp,
1763 [OP_LAYOUTGET] = (nfsd4_dec)nfsd4_decode_notsupp,
1764 [OP_LAYOUTRETURN] = (nfsd4_dec)nfsd4_decode_notsupp,
1765 #endif
1766 [OP_SECINFO_NO_NAME] = (nfsd4_dec)nfsd4_decode_secinfo_no_name,
1767 [OP_SEQUENCE] = (nfsd4_dec)nfsd4_decode_sequence,
1768 [OP_SET_SSV] = (nfsd4_dec)nfsd4_decode_notsupp,
1769 [OP_TEST_STATEID] = (nfsd4_dec)nfsd4_decode_test_stateid,
1770 [OP_WANT_DELEGATION] = (nfsd4_dec)nfsd4_decode_notsupp,
1771 [OP_DESTROY_CLIENTID] = (nfsd4_dec)nfsd4_decode_destroy_clientid,
1772 [OP_RECLAIM_COMPLETE] = (nfsd4_dec)nfsd4_decode_reclaim_complete,
1773
1774 /* new operations for NFSv4.2 */
1775 [OP_ALLOCATE] = (nfsd4_dec)nfsd4_decode_fallocate,
1776 [OP_COPY] = (nfsd4_dec)nfsd4_decode_notsupp,
1777 [OP_COPY_NOTIFY] = (nfsd4_dec)nfsd4_decode_notsupp,
1778 [OP_DEALLOCATE] = (nfsd4_dec)nfsd4_decode_fallocate,
1779 [OP_IO_ADVISE] = (nfsd4_dec)nfsd4_decode_notsupp,
1780 [OP_LAYOUTERROR] = (nfsd4_dec)nfsd4_decode_notsupp,
1781 [OP_LAYOUTSTATS] = (nfsd4_dec)nfsd4_decode_notsupp,
1782 [OP_OFFLOAD_CANCEL] = (nfsd4_dec)nfsd4_decode_notsupp,
1783 [OP_OFFLOAD_STATUS] = (nfsd4_dec)nfsd4_decode_notsupp,
1784 [OP_READ_PLUS] = (nfsd4_dec)nfsd4_decode_notsupp,
1785 [OP_SEEK] = (nfsd4_dec)nfsd4_decode_seek,
1786 [OP_WRITE_SAME] = (nfsd4_dec)nfsd4_decode_notsupp,
1787 };
1788
1789 static inline bool
1790 nfsd4_opnum_in_range(struct nfsd4_compoundargs *argp, struct nfsd4_op *op)
1791 {
1792 if (op->opnum < FIRST_NFS4_OP)
1793 return false;
1794 else if (argp->minorversion == 0 && op->opnum > LAST_NFS40_OP)
1795 return false;
1796 else if (argp->minorversion == 1 && op->opnum > LAST_NFS41_OP)
1797 return false;
1798 else if (argp->minorversion == 2 && op->opnum > LAST_NFS42_OP)
1799 return false;
1800 return true;
1801 }
1802
1803 static __be32
1804 nfsd4_decode_compound(struct nfsd4_compoundargs *argp)
1805 {
1806 DECODE_HEAD;
1807 struct nfsd4_op *op;
1808 bool cachethis = false;
1809 int auth_slack= argp->rqstp->rq_auth_slack;
1810 int max_reply = auth_slack + 8; /* opcnt, status */
1811 int readcount = 0;
1812 int readbytes = 0;
1813 int i;
1814
1815 READ_BUF(4);
1816 argp->taglen = be32_to_cpup(p++);
1817 READ_BUF(argp->taglen + 8);
1818 SAVEMEM(argp->tag, argp->taglen);
1819 argp->minorversion = be32_to_cpup(p++);
1820 argp->opcnt = be32_to_cpup(p++);
1821 max_reply += 4 + (XDR_QUADLEN(argp->taglen) << 2);
1822
1823 if (argp->taglen > NFSD4_MAX_TAGLEN)
1824 goto xdr_error;
1825 if (argp->opcnt > 100)
1826 goto xdr_error;
1827
1828 if (argp->opcnt > ARRAY_SIZE(argp->iops)) {
1829 argp->ops = kzalloc(argp->opcnt * sizeof(*argp->ops), GFP_KERNEL);
1830 if (!argp->ops) {
1831 argp->ops = argp->iops;
1832 dprintk("nfsd: couldn't allocate room for COMPOUND\n");
1833 goto xdr_error;
1834 }
1835 }
1836
1837 if (argp->minorversion > NFSD_SUPPORTED_MINOR_VERSION)
1838 argp->opcnt = 0;
1839
1840 for (i = 0; i < argp->opcnt; i++) {
1841 op = &argp->ops[i];
1842 op->replay = NULL;
1843
1844 READ_BUF(4);
1845 op->opnum = be32_to_cpup(p++);
1846
1847 if (nfsd4_opnum_in_range(argp, op))
1848 op->status = nfsd4_dec_ops[op->opnum](argp, &op->u);
1849 else {
1850 op->opnum = OP_ILLEGAL;
1851 op->status = nfserr_op_illegal;
1852 }
1853 /*
1854 * We'll try to cache the result in the DRC if any one
1855 * op in the compound wants to be cached:
1856 */
1857 cachethis |= nfsd4_cache_this_op(op);
1858
1859 if (op->opnum == OP_READ) {
1860 readcount++;
1861 readbytes += nfsd4_max_reply(argp->rqstp, op);
1862 } else
1863 max_reply += nfsd4_max_reply(argp->rqstp, op);
1864 /*
1865 * OP_LOCK may return a conflicting lock. (Special case
1866 * because it will just skip encoding this if it runs
1867 * out of xdr buffer space, and it is the only operation
1868 * that behaves this way.)
1869 */
1870 if (op->opnum == OP_LOCK)
1871 max_reply += NFS4_OPAQUE_LIMIT;
1872
1873 if (op->status) {
1874 argp->opcnt = i+1;
1875 break;
1876 }
1877 }
1878 /* Sessions make the DRC unnecessary: */
1879 if (argp->minorversion)
1880 cachethis = false;
1881 svc_reserve(argp->rqstp, max_reply + readbytes);
1882 argp->rqstp->rq_cachetype = cachethis ? RC_REPLBUFF : RC_NOCACHE;
1883
1884 if (readcount > 1 || max_reply > PAGE_SIZE - auth_slack)
1885 clear_bit(RQ_SPLICE_OK, &argp->rqstp->rq_flags);
1886
1887 DECODE_TAIL;
1888 }
1889
1890 static __be32 *encode_change(__be32 *p, struct kstat *stat, struct inode *inode)
1891 {
1892 if (IS_I_VERSION(inode)) {
1893 p = xdr_encode_hyper(p, inode->i_version);
1894 } else {
1895 *p++ = cpu_to_be32(stat->ctime.tv_sec);
1896 *p++ = cpu_to_be32(stat->ctime.tv_nsec);
1897 }
1898 return p;
1899 }
1900
1901 static __be32 *encode_cinfo(__be32 *p, struct nfsd4_change_info *c)
1902 {
1903 *p++ = cpu_to_be32(c->atomic);
1904 if (c->change_supported) {
1905 p = xdr_encode_hyper(p, c->before_change);
1906 p = xdr_encode_hyper(p, c->after_change);
1907 } else {
1908 *p++ = cpu_to_be32(c->before_ctime_sec);
1909 *p++ = cpu_to_be32(c->before_ctime_nsec);
1910 *p++ = cpu_to_be32(c->after_ctime_sec);
1911 *p++ = cpu_to_be32(c->after_ctime_nsec);
1912 }
1913 return p;
1914 }
1915
1916 /* Encode as an array of strings the string given with components
1917 * separated @sep, escaped with esc_enter and esc_exit.
1918 */
1919 static __be32 nfsd4_encode_components_esc(struct xdr_stream *xdr, char sep,
1920 char *components, char esc_enter,
1921 char esc_exit)
1922 {
1923 __be32 *p;
1924 __be32 pathlen;
1925 int pathlen_offset;
1926 int strlen, count=0;
1927 char *str, *end, *next;
1928
1929 dprintk("nfsd4_encode_components(%s)\n", components);
1930
1931 pathlen_offset = xdr->buf->len;
1932 p = xdr_reserve_space(xdr, 4);
1933 if (!p)
1934 return nfserr_resource;
1935 p++; /* We will fill this in with @count later */
1936
1937 end = str = components;
1938 while (*end) {
1939 bool found_esc = false;
1940
1941 /* try to parse as esc_start, ..., esc_end, sep */
1942 if (*str == esc_enter) {
1943 for (; *end && (*end != esc_exit); end++)
1944 /* find esc_exit or end of string */;
1945 next = end + 1;
1946 if (*end && (!*next || *next == sep)) {
1947 str++;
1948 found_esc = true;
1949 }
1950 }
1951
1952 if (!found_esc)
1953 for (; *end && (*end != sep); end++)
1954 /* find sep or end of string */;
1955
1956 strlen = end - str;
1957 if (strlen) {
1958 p = xdr_reserve_space(xdr, strlen + 4);
1959 if (!p)
1960 return nfserr_resource;
1961 p = xdr_encode_opaque(p, str, strlen);
1962 count++;
1963 }
1964 else
1965 end++;
1966 if (found_esc)
1967 end = next;
1968
1969 str = end;
1970 }
1971 pathlen = htonl(count);
1972 write_bytes_to_xdr_buf(xdr->buf, pathlen_offset, &pathlen, 4);
1973 return 0;
1974 }
1975
1976 /* Encode as an array of strings the string given with components
1977 * separated @sep.
1978 */
1979 static __be32 nfsd4_encode_components(struct xdr_stream *xdr, char sep,
1980 char *components)
1981 {
1982 return nfsd4_encode_components_esc(xdr, sep, components, 0, 0);
1983 }
1984
1985 /*
1986 * encode a location element of a fs_locations structure
1987 */
1988 static __be32 nfsd4_encode_fs_location4(struct xdr_stream *xdr,
1989 struct nfsd4_fs_location *location)
1990 {
1991 __be32 status;
1992
1993 status = nfsd4_encode_components_esc(xdr, ':', location->hosts,
1994 '[', ']');
1995 if (status)
1996 return status;
1997 status = nfsd4_encode_components(xdr, '/', location->path);
1998 if (status)
1999 return status;
2000 return 0;
2001 }
2002
2003 /*
2004 * Encode a path in RFC3530 'pathname4' format
2005 */
2006 static __be32 nfsd4_encode_path(struct xdr_stream *xdr,
2007 const struct path *root,
2008 const struct path *path)
2009 {
2010 struct path cur = *path;
2011 __be32 *p;
2012 struct dentry **components = NULL;
2013 unsigned int ncomponents = 0;
2014 __be32 err = nfserr_jukebox;
2015
2016 dprintk("nfsd4_encode_components(");
2017
2018 path_get(&cur);
2019 /* First walk the path up to the nfsd root, and store the
2020 * dentries/path components in an array.
2021 */
2022 for (;;) {
2023 if (path_equal(&cur, root))
2024 break;
2025 if (cur.dentry == cur.mnt->mnt_root) {
2026 if (follow_up(&cur))
2027 continue;
2028 goto out_free;
2029 }
2030 if ((ncomponents & 15) == 0) {
2031 struct dentry **new;
2032 new = krealloc(components,
2033 sizeof(*new) * (ncomponents + 16),
2034 GFP_KERNEL);
2035 if (!new)
2036 goto out_free;
2037 components = new;
2038 }
2039 components[ncomponents++] = cur.dentry;
2040 cur.dentry = dget_parent(cur.dentry);
2041 }
2042 err = nfserr_resource;
2043 p = xdr_reserve_space(xdr, 4);
2044 if (!p)
2045 goto out_free;
2046 *p++ = cpu_to_be32(ncomponents);
2047
2048 while (ncomponents) {
2049 struct dentry *dentry = components[ncomponents - 1];
2050 unsigned int len;
2051
2052 spin_lock(&dentry->d_lock);
2053 len = dentry->d_name.len;
2054 p = xdr_reserve_space(xdr, len + 4);
2055 if (!p) {
2056 spin_unlock(&dentry->d_lock);
2057 goto out_free;
2058 }
2059 p = xdr_encode_opaque(p, dentry->d_name.name, len);
2060 dprintk("/%pd", dentry);
2061 spin_unlock(&dentry->d_lock);
2062 dput(dentry);
2063 ncomponents--;
2064 }
2065
2066 err = 0;
2067 out_free:
2068 dprintk(")\n");
2069 while (ncomponents)
2070 dput(components[--ncomponents]);
2071 kfree(components);
2072 path_put(&cur);
2073 return err;
2074 }
2075
2076 static __be32 nfsd4_encode_fsloc_fsroot(struct xdr_stream *xdr,
2077 struct svc_rqst *rqstp, const struct path *path)
2078 {
2079 struct svc_export *exp_ps;
2080 __be32 res;
2081
2082 exp_ps = rqst_find_fsidzero_export(rqstp);
2083 if (IS_ERR(exp_ps))
2084 return nfserrno(PTR_ERR(exp_ps));
2085 res = nfsd4_encode_path(xdr, &exp_ps->ex_path, path);
2086 exp_put(exp_ps);
2087 return res;
2088 }
2089
2090 /*
2091 * encode a fs_locations structure
2092 */
2093 static __be32 nfsd4_encode_fs_locations(struct xdr_stream *xdr,
2094 struct svc_rqst *rqstp, struct svc_export *exp)
2095 {
2096 __be32 status;
2097 int i;
2098 __be32 *p;
2099 struct nfsd4_fs_locations *fslocs = &exp->ex_fslocs;
2100
2101 status = nfsd4_encode_fsloc_fsroot(xdr, rqstp, &exp->ex_path);
2102 if (status)
2103 return status;
2104 p = xdr_reserve_space(xdr, 4);
2105 if (!p)
2106 return nfserr_resource;
2107 *p++ = cpu_to_be32(fslocs->locations_count);
2108 for (i=0; i<fslocs->locations_count; i++) {
2109 status = nfsd4_encode_fs_location4(xdr, &fslocs->locations[i]);
2110 if (status)
2111 return status;
2112 }
2113 return 0;
2114 }
2115
2116 static u32 nfs4_file_type(umode_t mode)
2117 {
2118 switch (mode & S_IFMT) {
2119 case S_IFIFO: return NF4FIFO;
2120 case S_IFCHR: return NF4CHR;
2121 case S_IFDIR: return NF4DIR;
2122 case S_IFBLK: return NF4BLK;
2123 case S_IFLNK: return NF4LNK;
2124 case S_IFREG: return NF4REG;
2125 case S_IFSOCK: return NF4SOCK;
2126 default: return NF4BAD;
2127 };
2128 }
2129
2130 static inline __be32
2131 nfsd4_encode_aclname(struct xdr_stream *xdr, struct svc_rqst *rqstp,
2132 struct nfs4_ace *ace)
2133 {
2134 if (ace->whotype != NFS4_ACL_WHO_NAMED)
2135 return nfs4_acl_write_who(xdr, ace->whotype);
2136 else if (ace->flag & NFS4_ACE_IDENTIFIER_GROUP)
2137 return nfsd4_encode_group(xdr, rqstp, ace->who_gid);
2138 else
2139 return nfsd4_encode_user(xdr, rqstp, ace->who_uid);
2140 }
2141
2142 #define WORD0_ABSENT_FS_ATTRS (FATTR4_WORD0_FS_LOCATIONS | FATTR4_WORD0_FSID | \
2143 FATTR4_WORD0_RDATTR_ERROR)
2144 #define WORD1_ABSENT_FS_ATTRS FATTR4_WORD1_MOUNTED_ON_FILEID
2145
2146 #ifdef CONFIG_NFSD_V4_SECURITY_LABEL
2147 static inline __be32
2148 nfsd4_encode_security_label(struct xdr_stream *xdr, struct svc_rqst *rqstp,
2149 void *context, int len)
2150 {
2151 __be32 *p;
2152
2153 p = xdr_reserve_space(xdr, len + 4 + 4 + 4);
2154 if (!p)
2155 return nfserr_resource;
2156
2157 /*
2158 * For now we use a 0 here to indicate the null translation; in
2159 * the future we may place a call to translation code here.
2160 */
2161 *p++ = cpu_to_be32(0); /* lfs */
2162 *p++ = cpu_to_be32(0); /* pi */
2163 p = xdr_encode_opaque(p, context, len);
2164 return 0;
2165 }
2166 #else
2167 static inline __be32
2168 nfsd4_encode_security_label(struct xdr_stream *xdr, struct svc_rqst *rqstp,
2169 void *context, int len)
2170 { return 0; }
2171 #endif
2172
2173 static __be32 fattr_handle_absent_fs(u32 *bmval0, u32 *bmval1, u32 *rdattr_err)
2174 {
2175 /* As per referral draft: */
2176 if (*bmval0 & ~WORD0_ABSENT_FS_ATTRS ||
2177 *bmval1 & ~WORD1_ABSENT_FS_ATTRS) {
2178 if (*bmval0 & FATTR4_WORD0_RDATTR_ERROR ||
2179 *bmval0 & FATTR4_WORD0_FS_LOCATIONS)
2180 *rdattr_err = NFSERR_MOVED;
2181 else
2182 return nfserr_moved;
2183 }
2184 *bmval0 &= WORD0_ABSENT_FS_ATTRS;
2185 *bmval1 &= WORD1_ABSENT_FS_ATTRS;
2186 return 0;
2187 }
2188
2189
2190 static int get_parent_attributes(struct svc_export *exp, struct kstat *stat)
2191 {
2192 struct path path = exp->ex_path;
2193 int err;
2194
2195 path_get(&path);
2196 while (follow_up(&path)) {
2197 if (path.dentry != path.mnt->mnt_root)
2198 break;
2199 }
2200 err = vfs_getattr(&path, stat);
2201 path_put(&path);
2202 return err;
2203 }
2204
2205 /*
2206 * Note: @fhp can be NULL; in this case, we might have to compose the filehandle
2207 * ourselves.
2208 */
2209 static __be32
2210 nfsd4_encode_fattr(struct xdr_stream *xdr, struct svc_fh *fhp,
2211 struct svc_export *exp,
2212 struct dentry *dentry, u32 *bmval,
2213 struct svc_rqst *rqstp, int ignore_crossmnt)
2214 {
2215 u32 bmval0 = bmval[0];
2216 u32 bmval1 = bmval[1];
2217 u32 bmval2 = bmval[2];
2218 struct kstat stat;
2219 struct svc_fh *tempfh = NULL;
2220 struct kstatfs statfs;
2221 __be32 *p;
2222 int starting_len = xdr->buf->len;
2223 int attrlen_offset;
2224 __be32 attrlen;
2225 u32 dummy;
2226 u64 dummy64;
2227 u32 rdattr_err = 0;
2228 __be32 status;
2229 int err;
2230 int aclsupport = 0;
2231 struct nfs4_acl *acl = NULL;
2232 void *context = NULL;
2233 int contextlen;
2234 bool contextsupport = false;
2235 struct nfsd4_compoundres *resp = rqstp->rq_resp;
2236 u32 minorversion = resp->cstate.minorversion;
2237 struct path path = {
2238 .mnt = exp->ex_path.mnt,
2239 .dentry = dentry,
2240 };
2241 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
2242
2243 BUG_ON(bmval1 & NFSD_WRITEONLY_ATTRS_WORD1);
2244 BUG_ON(bmval0 & ~nfsd_suppattrs0(minorversion));
2245 BUG_ON(bmval1 & ~nfsd_suppattrs1(minorversion));
2246 BUG_ON(bmval2 & ~nfsd_suppattrs2(minorversion));
2247
2248 if (exp->ex_fslocs.migrated) {
2249 BUG_ON(bmval[2]);
2250 status = fattr_handle_absent_fs(&bmval0, &bmval1, &rdattr_err);
2251 if (status)
2252 goto out;
2253 }
2254
2255 err = vfs_getattr(&path, &stat);
2256 if (err)
2257 goto out_nfserr;
2258 if ((bmval0 & (FATTR4_WORD0_FILES_AVAIL | FATTR4_WORD0_FILES_FREE |
2259 FATTR4_WORD0_FILES_TOTAL | FATTR4_WORD0_MAXNAME)) ||
2260 (bmval1 & (FATTR4_WORD1_SPACE_AVAIL | FATTR4_WORD1_SPACE_FREE |
2261 FATTR4_WORD1_SPACE_TOTAL))) {
2262 err = vfs_statfs(&path, &statfs);
2263 if (err)
2264 goto out_nfserr;
2265 }
2266 if ((bmval0 & (FATTR4_WORD0_FILEHANDLE | FATTR4_WORD0_FSID)) && !fhp) {
2267 tempfh = kmalloc(sizeof(struct svc_fh), GFP_KERNEL);
2268 status = nfserr_jukebox;
2269 if (!tempfh)
2270 goto out;
2271 fh_init(tempfh, NFS4_FHSIZE);
2272 status = fh_compose(tempfh, exp, dentry, NULL);
2273 if (status)
2274 goto out;
2275 fhp = tempfh;
2276 }
2277 if (bmval0 & (FATTR4_WORD0_ACL | FATTR4_WORD0_ACLSUPPORT
2278 | FATTR4_WORD0_SUPPORTED_ATTRS)) {
2279 err = nfsd4_get_nfs4_acl(rqstp, dentry, &acl);
2280 aclsupport = (err == 0);
2281 if (bmval0 & FATTR4_WORD0_ACL) {
2282 if (err == -EOPNOTSUPP)
2283 bmval0 &= ~FATTR4_WORD0_ACL;
2284 else if (err == -EINVAL) {
2285 status = nfserr_attrnotsupp;
2286 goto out;
2287 } else if (err != 0)
2288 goto out_nfserr;
2289 }
2290 }
2291
2292 #ifdef CONFIG_NFSD_V4_SECURITY_LABEL
2293 if ((bmval[2] & FATTR4_WORD2_SECURITY_LABEL) ||
2294 bmval[0] & FATTR4_WORD0_SUPPORTED_ATTRS) {
2295 err = security_inode_getsecctx(d_inode(dentry),
2296 &context, &contextlen);
2297 contextsupport = (err == 0);
2298 if (bmval2 & FATTR4_WORD2_SECURITY_LABEL) {
2299 if (err == -EOPNOTSUPP)
2300 bmval2 &= ~FATTR4_WORD2_SECURITY_LABEL;
2301 else if (err)
2302 goto out_nfserr;
2303 }
2304 }
2305 #endif /* CONFIG_NFSD_V4_SECURITY_LABEL */
2306
2307 if (bmval2) {
2308 p = xdr_reserve_space(xdr, 16);
2309 if (!p)
2310 goto out_resource;
2311 *p++ = cpu_to_be32(3);
2312 *p++ = cpu_to_be32(bmval0);
2313 *p++ = cpu_to_be32(bmval1);
2314 *p++ = cpu_to_be32(bmval2);
2315 } else if (bmval1) {
2316 p = xdr_reserve_space(xdr, 12);
2317 if (!p)
2318 goto out_resource;
2319 *p++ = cpu_to_be32(2);
2320 *p++ = cpu_to_be32(bmval0);
2321 *p++ = cpu_to_be32(bmval1);
2322 } else {
2323 p = xdr_reserve_space(xdr, 8);
2324 if (!p)
2325 goto out_resource;
2326 *p++ = cpu_to_be32(1);
2327 *p++ = cpu_to_be32(bmval0);
2328 }
2329
2330 attrlen_offset = xdr->buf->len;
2331 p = xdr_reserve_space(xdr, 4);
2332 if (!p)
2333 goto out_resource;
2334 p++; /* to be backfilled later */
2335
2336 if (bmval0 & FATTR4_WORD0_SUPPORTED_ATTRS) {
2337 u32 word0 = nfsd_suppattrs0(minorversion);
2338 u32 word1 = nfsd_suppattrs1(minorversion);
2339 u32 word2 = nfsd_suppattrs2(minorversion);
2340
2341 if (!aclsupport)
2342 word0 &= ~FATTR4_WORD0_ACL;
2343 if (!contextsupport)
2344 word2 &= ~FATTR4_WORD2_SECURITY_LABEL;
2345 if (!word2) {
2346 p = xdr_reserve_space(xdr, 12);
2347 if (!p)
2348 goto out_resource;
2349 *p++ = cpu_to_be32(2);
2350 *p++ = cpu_to_be32(word0);
2351 *p++ = cpu_to_be32(word1);
2352 } else {
2353 p = xdr_reserve_space(xdr, 16);
2354 if (!p)
2355 goto out_resource;
2356 *p++ = cpu_to_be32(3);
2357 *p++ = cpu_to_be32(word0);
2358 *p++ = cpu_to_be32(word1);
2359 *p++ = cpu_to_be32(word2);
2360 }
2361 }
2362 if (bmval0 & FATTR4_WORD0_TYPE) {
2363 p = xdr_reserve_space(xdr, 4);
2364 if (!p)
2365 goto out_resource;
2366 dummy = nfs4_file_type(stat.mode);
2367 if (dummy == NF4BAD) {
2368 status = nfserr_serverfault;
2369 goto out;
2370 }
2371 *p++ = cpu_to_be32(dummy);
2372 }
2373 if (bmval0 & FATTR4_WORD0_FH_EXPIRE_TYPE) {
2374 p = xdr_reserve_space(xdr, 4);
2375 if (!p)
2376 goto out_resource;
2377 if (exp->ex_flags & NFSEXP_NOSUBTREECHECK)
2378 *p++ = cpu_to_be32(NFS4_FH_PERSISTENT);
2379 else
2380 *p++ = cpu_to_be32(NFS4_FH_PERSISTENT|
2381 NFS4_FH_VOL_RENAME);
2382 }
2383 if (bmval0 & FATTR4_WORD0_CHANGE) {
2384 p = xdr_reserve_space(xdr, 8);
2385 if (!p)
2386 goto out_resource;
2387 p = encode_change(p, &stat, d_inode(dentry));
2388 }
2389 if (bmval0 & FATTR4_WORD0_SIZE) {
2390 p = xdr_reserve_space(xdr, 8);
2391 if (!p)
2392 goto out_resource;
2393 p = xdr_encode_hyper(p, stat.size);
2394 }
2395 if (bmval0 & FATTR4_WORD0_LINK_SUPPORT) {
2396 p = xdr_reserve_space(xdr, 4);
2397 if (!p)
2398 goto out_resource;
2399 *p++ = cpu_to_be32(1);
2400 }
2401 if (bmval0 & FATTR4_WORD0_SYMLINK_SUPPORT) {
2402 p = xdr_reserve_space(xdr, 4);
2403 if (!p)
2404 goto out_resource;
2405 *p++ = cpu_to_be32(1);
2406 }
2407 if (bmval0 & FATTR4_WORD0_NAMED_ATTR) {
2408 p = xdr_reserve_space(xdr, 4);
2409 if (!p)
2410 goto out_resource;
2411 *p++ = cpu_to_be32(0);
2412 }
2413 if (bmval0 & FATTR4_WORD0_FSID) {
2414 p = xdr_reserve_space(xdr, 16);
2415 if (!p)
2416 goto out_resource;
2417 if (exp->ex_fslocs.migrated) {
2418 p = xdr_encode_hyper(p, NFS4_REFERRAL_FSID_MAJOR);
2419 p = xdr_encode_hyper(p, NFS4_REFERRAL_FSID_MINOR);
2420 } else switch(fsid_source(fhp)) {
2421 case FSIDSOURCE_FSID:
2422 p = xdr_encode_hyper(p, (u64)exp->ex_fsid);
2423 p = xdr_encode_hyper(p, (u64)0);
2424 break;
2425 case FSIDSOURCE_DEV:
2426 *p++ = cpu_to_be32(0);
2427 *p++ = cpu_to_be32(MAJOR(stat.dev));
2428 *p++ = cpu_to_be32(0);
2429 *p++ = cpu_to_be32(MINOR(stat.dev));
2430 break;
2431 case FSIDSOURCE_UUID:
2432 p = xdr_encode_opaque_fixed(p, exp->ex_uuid,
2433 EX_UUID_LEN);
2434 break;
2435 }
2436 }
2437 if (bmval0 & FATTR4_WORD0_UNIQUE_HANDLES) {
2438 p = xdr_reserve_space(xdr, 4);
2439 if (!p)
2440 goto out_resource;
2441 *p++ = cpu_to_be32(0);
2442 }
2443 if (bmval0 & FATTR4_WORD0_LEASE_TIME) {
2444 p = xdr_reserve_space(xdr, 4);
2445 if (!p)
2446 goto out_resource;
2447 *p++ = cpu_to_be32(nn->nfsd4_lease);
2448 }
2449 if (bmval0 & FATTR4_WORD0_RDATTR_ERROR) {
2450 p = xdr_reserve_space(xdr, 4);
2451 if (!p)
2452 goto out_resource;
2453 *p++ = cpu_to_be32(rdattr_err);
2454 }
2455 if (bmval0 & FATTR4_WORD0_ACL) {
2456 struct nfs4_ace *ace;
2457
2458 if (acl == NULL) {
2459 p = xdr_reserve_space(xdr, 4);
2460 if (!p)
2461 goto out_resource;
2462
2463 *p++ = cpu_to_be32(0);
2464 goto out_acl;
2465 }
2466 p = xdr_reserve_space(xdr, 4);
2467 if (!p)
2468 goto out_resource;
2469 *p++ = cpu_to_be32(acl->naces);
2470
2471 for (ace = acl->aces; ace < acl->aces + acl->naces; ace++) {
2472 p = xdr_reserve_space(xdr, 4*3);
2473 if (!p)
2474 goto out_resource;
2475 *p++ = cpu_to_be32(ace->type);
2476 *p++ = cpu_to_be32(ace->flag);
2477 *p++ = cpu_to_be32(ace->access_mask &
2478 NFS4_ACE_MASK_ALL);
2479 status = nfsd4_encode_aclname(xdr, rqstp, ace);
2480 if (status)
2481 goto out;
2482 }
2483 }
2484 out_acl:
2485 if (bmval0 & FATTR4_WORD0_ACLSUPPORT) {
2486 p = xdr_reserve_space(xdr, 4);
2487 if (!p)
2488 goto out_resource;
2489 *p++ = cpu_to_be32(aclsupport ?
2490 ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL : 0);
2491 }
2492 if (bmval0 & FATTR4_WORD0_CANSETTIME) {
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_CASE_INSENSITIVE) {
2499 p = xdr_reserve_space(xdr, 4);
2500 if (!p)
2501 goto out_resource;
2502 *p++ = cpu_to_be32(0);
2503 }
2504 if (bmval0 & FATTR4_WORD0_CASE_PRESERVING) {
2505 p = xdr_reserve_space(xdr, 4);
2506 if (!p)
2507 goto out_resource;
2508 *p++ = cpu_to_be32(1);
2509 }
2510 if (bmval0 & FATTR4_WORD0_CHOWN_RESTRICTED) {
2511 p = xdr_reserve_space(xdr, 4);
2512 if (!p)
2513 goto out_resource;
2514 *p++ = cpu_to_be32(1);
2515 }
2516 if (bmval0 & FATTR4_WORD0_FILEHANDLE) {
2517 p = xdr_reserve_space(xdr, fhp->fh_handle.fh_size + 4);
2518 if (!p)
2519 goto out_resource;
2520 p = xdr_encode_opaque(p, &fhp->fh_handle.fh_base,
2521 fhp->fh_handle.fh_size);
2522 }
2523 if (bmval0 & FATTR4_WORD0_FILEID) {
2524 p = xdr_reserve_space(xdr, 8);
2525 if (!p)
2526 goto out_resource;
2527 p = xdr_encode_hyper(p, stat.ino);
2528 }
2529 if (bmval0 & FATTR4_WORD0_FILES_AVAIL) {
2530 p = xdr_reserve_space(xdr, 8);
2531 if (!p)
2532 goto out_resource;
2533 p = xdr_encode_hyper(p, (u64) statfs.f_ffree);
2534 }
2535 if (bmval0 & FATTR4_WORD0_FILES_FREE) {
2536 p = xdr_reserve_space(xdr, 8);
2537 if (!p)
2538 goto out_resource;
2539 p = xdr_encode_hyper(p, (u64) statfs.f_ffree);
2540 }
2541 if (bmval0 & FATTR4_WORD0_FILES_TOTAL) {
2542 p = xdr_reserve_space(xdr, 8);
2543 if (!p)
2544 goto out_resource;
2545 p = xdr_encode_hyper(p, (u64) statfs.f_files);
2546 }
2547 if (bmval0 & FATTR4_WORD0_FS_LOCATIONS) {
2548 status = nfsd4_encode_fs_locations(xdr, rqstp, exp);
2549 if (status)
2550 goto out;
2551 }
2552 if (bmval0 & FATTR4_WORD0_HOMOGENEOUS) {
2553 p = xdr_reserve_space(xdr, 4);
2554 if (!p)
2555 goto out_resource;
2556 *p++ = cpu_to_be32(1);
2557 }
2558 if (bmval0 & FATTR4_WORD0_MAXFILESIZE) {
2559 p = xdr_reserve_space(xdr, 8);
2560 if (!p)
2561 goto out_resource;
2562 p = xdr_encode_hyper(p, exp->ex_path.mnt->mnt_sb->s_maxbytes);
2563 }
2564 if (bmval0 & FATTR4_WORD0_MAXLINK) {
2565 p = xdr_reserve_space(xdr, 4);
2566 if (!p)
2567 goto out_resource;
2568 *p++ = cpu_to_be32(255);
2569 }
2570 if (bmval0 & FATTR4_WORD0_MAXNAME) {
2571 p = xdr_reserve_space(xdr, 4);
2572 if (!p)
2573 goto out_resource;
2574 *p++ = cpu_to_be32(statfs.f_namelen);
2575 }
2576 if (bmval0 & FATTR4_WORD0_MAXREAD) {
2577 p = xdr_reserve_space(xdr, 8);
2578 if (!p)
2579 goto out_resource;
2580 p = xdr_encode_hyper(p, (u64) svc_max_payload(rqstp));
2581 }
2582 if (bmval0 & FATTR4_WORD0_MAXWRITE) {
2583 p = xdr_reserve_space(xdr, 8);
2584 if (!p)
2585 goto out_resource;
2586 p = xdr_encode_hyper(p, (u64) svc_max_payload(rqstp));
2587 }
2588 if (bmval1 & FATTR4_WORD1_MODE) {
2589 p = xdr_reserve_space(xdr, 4);
2590 if (!p)
2591 goto out_resource;
2592 *p++ = cpu_to_be32(stat.mode & S_IALLUGO);
2593 }
2594 if (bmval1 & FATTR4_WORD1_NO_TRUNC) {
2595 p = xdr_reserve_space(xdr, 4);
2596 if (!p)
2597 goto out_resource;
2598 *p++ = cpu_to_be32(1);
2599 }
2600 if (bmval1 & FATTR4_WORD1_NUMLINKS) {
2601 p = xdr_reserve_space(xdr, 4);
2602 if (!p)
2603 goto out_resource;
2604 *p++ = cpu_to_be32(stat.nlink);
2605 }
2606 if (bmval1 & FATTR4_WORD1_OWNER) {
2607 status = nfsd4_encode_user(xdr, rqstp, stat.uid);
2608 if (status)
2609 goto out;
2610 }
2611 if (bmval1 & FATTR4_WORD1_OWNER_GROUP) {
2612 status = nfsd4_encode_group(xdr, rqstp, stat.gid);
2613 if (status)
2614 goto out;
2615 }
2616 if (bmval1 & FATTR4_WORD1_RAWDEV) {
2617 p = xdr_reserve_space(xdr, 8);
2618 if (!p)
2619 goto out_resource;
2620 *p++ = cpu_to_be32((u32) MAJOR(stat.rdev));
2621 *p++ = cpu_to_be32((u32) MINOR(stat.rdev));
2622 }
2623 if (bmval1 & FATTR4_WORD1_SPACE_AVAIL) {
2624 p = xdr_reserve_space(xdr, 8);
2625 if (!p)
2626 goto out_resource;
2627 dummy64 = (u64)statfs.f_bavail * (u64)statfs.f_bsize;
2628 p = xdr_encode_hyper(p, dummy64);
2629 }
2630 if (bmval1 & FATTR4_WORD1_SPACE_FREE) {
2631 p = xdr_reserve_space(xdr, 8);
2632 if (!p)
2633 goto out_resource;
2634 dummy64 = (u64)statfs.f_bfree * (u64)statfs.f_bsize;
2635 p = xdr_encode_hyper(p, dummy64);
2636 }
2637 if (bmval1 & FATTR4_WORD1_SPACE_TOTAL) {
2638 p = xdr_reserve_space(xdr, 8);
2639 if (!p)
2640 goto out_resource;
2641 dummy64 = (u64)statfs.f_blocks * (u64)statfs.f_bsize;
2642 p = xdr_encode_hyper(p, dummy64);
2643 }
2644 if (bmval1 & FATTR4_WORD1_SPACE_USED) {
2645 p = xdr_reserve_space(xdr, 8);
2646 if (!p)
2647 goto out_resource;
2648 dummy64 = (u64)stat.blocks << 9;
2649 p = xdr_encode_hyper(p, dummy64);
2650 }
2651 if (bmval1 & FATTR4_WORD1_TIME_ACCESS) {
2652 p = xdr_reserve_space(xdr, 12);
2653 if (!p)
2654 goto out_resource;
2655 p = xdr_encode_hyper(p, (s64)stat.atime.tv_sec);
2656 *p++ = cpu_to_be32(stat.atime.tv_nsec);
2657 }
2658 if (bmval1 & FATTR4_WORD1_TIME_DELTA) {
2659 p = xdr_reserve_space(xdr, 12);
2660 if (!p)
2661 goto out_resource;
2662 *p++ = cpu_to_be32(0);
2663 *p++ = cpu_to_be32(1);
2664 *p++ = cpu_to_be32(0);
2665 }
2666 if (bmval1 & FATTR4_WORD1_TIME_METADATA) {
2667 p = xdr_reserve_space(xdr, 12);
2668 if (!p)
2669 goto out_resource;
2670 p = xdr_encode_hyper(p, (s64)stat.ctime.tv_sec);
2671 *p++ = cpu_to_be32(stat.ctime.tv_nsec);
2672 }
2673 if (bmval1 & FATTR4_WORD1_TIME_MODIFY) {
2674 p = xdr_reserve_space(xdr, 12);
2675 if (!p)
2676 goto out_resource;
2677 p = xdr_encode_hyper(p, (s64)stat.mtime.tv_sec);
2678 *p++ = cpu_to_be32(stat.mtime.tv_nsec);
2679 }
2680 if (bmval1 & FATTR4_WORD1_MOUNTED_ON_FILEID) {
2681 p = xdr_reserve_space(xdr, 8);
2682 if (!p)
2683 goto out_resource;
2684 /*
2685 * Get parent's attributes if not ignoring crossmount
2686 * and this is the root of a cross-mounted filesystem.
2687 */
2688 if (ignore_crossmnt == 0 &&
2689 dentry == exp->ex_path.mnt->mnt_root)
2690 get_parent_attributes(exp, &stat);
2691 p = xdr_encode_hyper(p, stat.ino);
2692 }
2693 #ifdef CONFIG_NFSD_PNFS
2694 if ((bmval1 & FATTR4_WORD1_FS_LAYOUT_TYPES) ||
2695 (bmval2 & FATTR4_WORD2_LAYOUT_TYPES)) {
2696 if (exp->ex_layout_type) {
2697 p = xdr_reserve_space(xdr, 8);
2698 if (!p)
2699 goto out_resource;
2700 *p++ = cpu_to_be32(1);
2701 *p++ = cpu_to_be32(exp->ex_layout_type);
2702 } else {
2703 p = xdr_reserve_space(xdr, 4);
2704 if (!p)
2705 goto out_resource;
2706 *p++ = cpu_to_be32(0);
2707 }
2708 }
2709
2710 if (bmval2 & FATTR4_WORD2_LAYOUT_BLKSIZE) {
2711 p = xdr_reserve_space(xdr, 4);
2712 if (!p)
2713 goto out_resource;
2714 *p++ = cpu_to_be32(stat.blksize);
2715 }
2716 #endif /* CONFIG_NFSD_PNFS */
2717 if (bmval2 & FATTR4_WORD2_SECURITY_LABEL) {
2718 status = nfsd4_encode_security_label(xdr, rqstp, context,
2719 contextlen);
2720 if (status)
2721 goto out;
2722 }
2723 if (bmval2 & FATTR4_WORD2_SUPPATTR_EXCLCREAT) {
2724 p = xdr_reserve_space(xdr, 16);
2725 if (!p)
2726 goto out_resource;
2727 *p++ = cpu_to_be32(3);
2728 *p++ = cpu_to_be32(NFSD_SUPPATTR_EXCLCREAT_WORD0);
2729 *p++ = cpu_to_be32(NFSD_SUPPATTR_EXCLCREAT_WORD1);
2730 *p++ = cpu_to_be32(NFSD_SUPPATTR_EXCLCREAT_WORD2);
2731 }
2732
2733 attrlen = htonl(xdr->buf->len - attrlen_offset - 4);
2734 write_bytes_to_xdr_buf(xdr->buf, attrlen_offset, &attrlen, 4);
2735 status = nfs_ok;
2736
2737 out:
2738 #ifdef CONFIG_NFSD_V4_SECURITY_LABEL
2739 if (context)
2740 security_release_secctx(context, contextlen);
2741 #endif /* CONFIG_NFSD_V4_SECURITY_LABEL */
2742 kfree(acl);
2743 if (tempfh) {
2744 fh_put(tempfh);
2745 kfree(tempfh);
2746 }
2747 if (status)
2748 xdr_truncate_encode(xdr, starting_len);
2749 return status;
2750 out_nfserr:
2751 status = nfserrno(err);
2752 goto out;
2753 out_resource:
2754 status = nfserr_resource;
2755 goto out;
2756 }
2757
2758 static void svcxdr_init_encode_from_buffer(struct xdr_stream *xdr,
2759 struct xdr_buf *buf, __be32 *p, int bytes)
2760 {
2761 xdr->scratch.iov_len = 0;
2762 memset(buf, 0, sizeof(struct xdr_buf));
2763 buf->head[0].iov_base = p;
2764 buf->head[0].iov_len = 0;
2765 buf->len = 0;
2766 xdr->buf = buf;
2767 xdr->iov = buf->head;
2768 xdr->p = p;
2769 xdr->end = (void *)p + bytes;
2770 buf->buflen = bytes;
2771 }
2772
2773 __be32 nfsd4_encode_fattr_to_buf(__be32 **p, int words,
2774 struct svc_fh *fhp, struct svc_export *exp,
2775 struct dentry *dentry, u32 *bmval,
2776 struct svc_rqst *rqstp, int ignore_crossmnt)
2777 {
2778 struct xdr_buf dummy;
2779 struct xdr_stream xdr;
2780 __be32 ret;
2781
2782 svcxdr_init_encode_from_buffer(&xdr, &dummy, *p, words << 2);
2783 ret = nfsd4_encode_fattr(&xdr, fhp, exp, dentry, bmval, rqstp,
2784 ignore_crossmnt);
2785 *p = xdr.p;
2786 return ret;
2787 }
2788
2789 static inline int attributes_need_mount(u32 *bmval)
2790 {
2791 if (bmval[0] & ~(FATTR4_WORD0_RDATTR_ERROR | FATTR4_WORD0_LEASE_TIME))
2792 return 1;
2793 if (bmval[1] & ~FATTR4_WORD1_MOUNTED_ON_FILEID)
2794 return 1;
2795 return 0;
2796 }
2797
2798 static __be32
2799 nfsd4_encode_dirent_fattr(struct xdr_stream *xdr, struct nfsd4_readdir *cd,
2800 const char *name, int namlen)
2801 {
2802 struct svc_export *exp = cd->rd_fhp->fh_export;
2803 struct dentry *dentry;
2804 __be32 nfserr;
2805 int ignore_crossmnt = 0;
2806
2807 dentry = lookup_one_len(name, cd->rd_fhp->fh_dentry, namlen);
2808 if (IS_ERR(dentry))
2809 return nfserrno(PTR_ERR(dentry));
2810 if (d_really_is_negative(dentry)) {
2811 /*
2812 * nfsd_buffered_readdir drops the i_mutex between
2813 * readdir and calling this callback, leaving a window
2814 * where this directory entry could have gone away.
2815 */
2816 dput(dentry);
2817 return nfserr_noent;
2818 }
2819
2820 exp_get(exp);
2821 /*
2822 * In the case of a mountpoint, the client may be asking for
2823 * attributes that are only properties of the underlying filesystem
2824 * as opposed to the cross-mounted file system. In such a case,
2825 * we will not follow the cross mount and will fill the attribtutes
2826 * directly from the mountpoint dentry.
2827 */
2828 if (nfsd_mountpoint(dentry, exp)) {
2829 int err;
2830
2831 if (!(exp->ex_flags & NFSEXP_V4ROOT)
2832 && !attributes_need_mount(cd->rd_bmval)) {
2833 ignore_crossmnt = 1;
2834 goto out_encode;
2835 }
2836 /*
2837 * Why the heck aren't we just using nfsd_lookup??
2838 * Different "."/".." handling? Something else?
2839 * At least, add a comment here to explain....
2840 */
2841 err = nfsd_cross_mnt(cd->rd_rqstp, &dentry, &exp);
2842 if (err) {
2843 nfserr = nfserrno(err);
2844 goto out_put;
2845 }
2846 nfserr = check_nfsd_access(exp, cd->rd_rqstp);
2847 if (nfserr)
2848 goto out_put;
2849
2850 }
2851 out_encode:
2852 nfserr = nfsd4_encode_fattr(xdr, NULL, exp, dentry, cd->rd_bmval,
2853 cd->rd_rqstp, ignore_crossmnt);
2854 out_put:
2855 dput(dentry);
2856 exp_put(exp);
2857 return nfserr;
2858 }
2859
2860 static __be32 *
2861 nfsd4_encode_rdattr_error(struct xdr_stream *xdr, __be32 nfserr)
2862 {
2863 __be32 *p;
2864
2865 p = xdr_reserve_space(xdr, 20);
2866 if (!p)
2867 return NULL;
2868 *p++ = htonl(2);
2869 *p++ = htonl(FATTR4_WORD0_RDATTR_ERROR); /* bmval0 */
2870 *p++ = htonl(0); /* bmval1 */
2871
2872 *p++ = htonl(4); /* attribute length */
2873 *p++ = nfserr; /* no htonl */
2874 return p;
2875 }
2876
2877 static int
2878 nfsd4_encode_dirent(void *ccdv, const char *name, int namlen,
2879 loff_t offset, u64 ino, unsigned int d_type)
2880 {
2881 struct readdir_cd *ccd = ccdv;
2882 struct nfsd4_readdir *cd = container_of(ccd, struct nfsd4_readdir, common);
2883 struct xdr_stream *xdr = cd->xdr;
2884 int start_offset = xdr->buf->len;
2885 int cookie_offset;
2886 u32 name_and_cookie;
2887 int entry_bytes;
2888 __be32 nfserr = nfserr_toosmall;
2889 __be64 wire_offset;
2890 __be32 *p;
2891
2892 /* In nfsv4, "." and ".." never make it onto the wire.. */
2893 if (name && isdotent(name, namlen)) {
2894 cd->common.err = nfs_ok;
2895 return 0;
2896 }
2897
2898 if (cd->cookie_offset) {
2899 wire_offset = cpu_to_be64(offset);
2900 write_bytes_to_xdr_buf(xdr->buf, cd->cookie_offset,
2901 &wire_offset, 8);
2902 }
2903
2904 p = xdr_reserve_space(xdr, 4);
2905 if (!p)
2906 goto fail;
2907 *p++ = xdr_one; /* mark entry present */
2908 cookie_offset = xdr->buf->len;
2909 p = xdr_reserve_space(xdr, 3*4 + namlen);
2910 if (!p)
2911 goto fail;
2912 p = xdr_encode_hyper(p, NFS_OFFSET_MAX); /* offset of next entry */
2913 p = xdr_encode_array(p, name, namlen); /* name length & name */
2914
2915 nfserr = nfsd4_encode_dirent_fattr(xdr, cd, name, namlen);
2916 switch (nfserr) {
2917 case nfs_ok:
2918 break;
2919 case nfserr_resource:
2920 nfserr = nfserr_toosmall;
2921 goto fail;
2922 case nfserr_noent:
2923 xdr_truncate_encode(xdr, start_offset);
2924 goto skip_entry;
2925 default:
2926 /*
2927 * If the client requested the RDATTR_ERROR attribute,
2928 * we stuff the error code into this attribute
2929 * and continue. If this attribute was not requested,
2930 * then in accordance with the spec, we fail the
2931 * entire READDIR operation(!)
2932 */
2933 if (!(cd->rd_bmval[0] & FATTR4_WORD0_RDATTR_ERROR))
2934 goto fail;
2935 p = nfsd4_encode_rdattr_error(xdr, nfserr);
2936 if (p == NULL) {
2937 nfserr = nfserr_toosmall;
2938 goto fail;
2939 }
2940 }
2941 nfserr = nfserr_toosmall;
2942 entry_bytes = xdr->buf->len - start_offset;
2943 if (entry_bytes > cd->rd_maxcount)
2944 goto fail;
2945 cd->rd_maxcount -= entry_bytes;
2946 /*
2947 * RFC 3530 14.2.24 describes rd_dircount as only a "hint", so
2948 * let's always let through the first entry, at least:
2949 */
2950 if (!cd->rd_dircount)
2951 goto fail;
2952 name_and_cookie = 4 + 4 * XDR_QUADLEN(namlen) + 8;
2953 if (name_and_cookie > cd->rd_dircount && cd->cookie_offset)
2954 goto fail;
2955 cd->rd_dircount -= min(cd->rd_dircount, name_and_cookie);
2956
2957 cd->cookie_offset = cookie_offset;
2958 skip_entry:
2959 cd->common.err = nfs_ok;
2960 return 0;
2961 fail:
2962 xdr_truncate_encode(xdr, start_offset);
2963 cd->common.err = nfserr;
2964 return -EINVAL;
2965 }
2966
2967 static __be32
2968 nfsd4_encode_stateid(struct xdr_stream *xdr, stateid_t *sid)
2969 {
2970 __be32 *p;
2971
2972 p = xdr_reserve_space(xdr, sizeof(stateid_t));
2973 if (!p)
2974 return nfserr_resource;
2975 *p++ = cpu_to_be32(sid->si_generation);
2976 p = xdr_encode_opaque_fixed(p, &sid->si_opaque,
2977 sizeof(stateid_opaque_t));
2978 return 0;
2979 }
2980
2981 static __be32
2982 nfsd4_encode_access(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_access *access)
2983 {
2984 struct xdr_stream *xdr = &resp->xdr;
2985 __be32 *p;
2986
2987 if (!nfserr) {
2988 p = xdr_reserve_space(xdr, 8);
2989 if (!p)
2990 return nfserr_resource;
2991 *p++ = cpu_to_be32(access->ac_supported);
2992 *p++ = cpu_to_be32(access->ac_resp_access);
2993 }
2994 return nfserr;
2995 }
2996
2997 static __be32 nfsd4_encode_bind_conn_to_session(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_bind_conn_to_session *bcts)
2998 {
2999 struct xdr_stream *xdr = &resp->xdr;
3000 __be32 *p;
3001
3002 if (!nfserr) {
3003 p = xdr_reserve_space(xdr, NFS4_MAX_SESSIONID_LEN + 8);
3004 if (!p)
3005 return nfserr_resource;
3006 p = xdr_encode_opaque_fixed(p, bcts->sessionid.data,
3007 NFS4_MAX_SESSIONID_LEN);
3008 *p++ = cpu_to_be32(bcts->dir);
3009 /* Sorry, we do not yet support RDMA over 4.1: */
3010 *p++ = cpu_to_be32(0);
3011 }
3012 return nfserr;
3013 }
3014
3015 static __be32
3016 nfsd4_encode_close(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_close *close)
3017 {
3018 struct xdr_stream *xdr = &resp->xdr;
3019
3020 if (!nfserr)
3021 nfserr = nfsd4_encode_stateid(xdr, &close->cl_stateid);
3022
3023 return nfserr;
3024 }
3025
3026
3027 static __be32
3028 nfsd4_encode_commit(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_commit *commit)
3029 {
3030 struct xdr_stream *xdr = &resp->xdr;
3031 __be32 *p;
3032
3033 if (!nfserr) {
3034 p = xdr_reserve_space(xdr, NFS4_VERIFIER_SIZE);
3035 if (!p)
3036 return nfserr_resource;
3037 p = xdr_encode_opaque_fixed(p, commit->co_verf.data,
3038 NFS4_VERIFIER_SIZE);
3039 }
3040 return nfserr;
3041 }
3042
3043 static __be32
3044 nfsd4_encode_create(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_create *create)
3045 {
3046 struct xdr_stream *xdr = &resp->xdr;
3047 __be32 *p;
3048
3049 if (!nfserr) {
3050 p = xdr_reserve_space(xdr, 32);
3051 if (!p)
3052 return nfserr_resource;
3053 p = encode_cinfo(p, &create->cr_cinfo);
3054 *p++ = cpu_to_be32(2);
3055 *p++ = cpu_to_be32(create->cr_bmval[0]);
3056 *p++ = cpu_to_be32(create->cr_bmval[1]);
3057 }
3058 return nfserr;
3059 }
3060
3061 static __be32
3062 nfsd4_encode_getattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_getattr *getattr)
3063 {
3064 struct svc_fh *fhp = getattr->ga_fhp;
3065 struct xdr_stream *xdr = &resp->xdr;
3066
3067 if (nfserr)
3068 return nfserr;
3069
3070 nfserr = nfsd4_encode_fattr(xdr, fhp, fhp->fh_export, fhp->fh_dentry,
3071 getattr->ga_bmval,
3072 resp->rqstp, 0);
3073 return nfserr;
3074 }
3075
3076 static __be32
3077 nfsd4_encode_getfh(struct nfsd4_compoundres *resp, __be32 nfserr, struct svc_fh **fhpp)
3078 {
3079 struct xdr_stream *xdr = &resp->xdr;
3080 struct svc_fh *fhp = *fhpp;
3081 unsigned int len;
3082 __be32 *p;
3083
3084 if (!nfserr) {
3085 len = fhp->fh_handle.fh_size;
3086 p = xdr_reserve_space(xdr, len + 4);
3087 if (!p)
3088 return nfserr_resource;
3089 p = xdr_encode_opaque(p, &fhp->fh_handle.fh_base, len);
3090 }
3091 return nfserr;
3092 }
3093
3094 /*
3095 * Including all fields other than the name, a LOCK4denied structure requires
3096 * 8(clientid) + 4(namelen) + 8(offset) + 8(length) + 4(type) = 32 bytes.
3097 */
3098 static __be32
3099 nfsd4_encode_lock_denied(struct xdr_stream *xdr, struct nfsd4_lock_denied *ld)
3100 {
3101 struct xdr_netobj *conf = &ld->ld_owner;
3102 __be32 *p;
3103
3104 again:
3105 p = xdr_reserve_space(xdr, 32 + XDR_LEN(conf->len));
3106 if (!p) {
3107 /*
3108 * Don't fail to return the result just because we can't
3109 * return the conflicting open:
3110 */
3111 if (conf->len) {
3112 kfree(conf->data);
3113 conf->len = 0;
3114 conf->data = NULL;
3115 goto again;
3116 }
3117 return nfserr_resource;
3118 }
3119 p = xdr_encode_hyper(p, ld->ld_start);
3120 p = xdr_encode_hyper(p, ld->ld_length);
3121 *p++ = cpu_to_be32(ld->ld_type);
3122 if (conf->len) {
3123 p = xdr_encode_opaque_fixed(p, &ld->ld_clientid, 8);
3124 p = xdr_encode_opaque(p, conf->data, conf->len);
3125 kfree(conf->data);
3126 } else { /* non - nfsv4 lock in conflict, no clientid nor owner */
3127 p = xdr_encode_hyper(p, (u64)0); /* clientid */
3128 *p++ = cpu_to_be32(0); /* length of owner name */
3129 }
3130 return nfserr_denied;
3131 }
3132
3133 static __be32
3134 nfsd4_encode_lock(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lock *lock)
3135 {
3136 struct xdr_stream *xdr = &resp->xdr;
3137
3138 if (!nfserr)
3139 nfserr = nfsd4_encode_stateid(xdr, &lock->lk_resp_stateid);
3140 else if (nfserr == nfserr_denied)
3141 nfserr = nfsd4_encode_lock_denied(xdr, &lock->lk_denied);
3142
3143 return nfserr;
3144 }
3145
3146 static __be32
3147 nfsd4_encode_lockt(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lockt *lockt)
3148 {
3149 struct xdr_stream *xdr = &resp->xdr;
3150
3151 if (nfserr == nfserr_denied)
3152 nfsd4_encode_lock_denied(xdr, &lockt->lt_denied);
3153 return nfserr;
3154 }
3155
3156 static __be32
3157 nfsd4_encode_locku(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_locku *locku)
3158 {
3159 struct xdr_stream *xdr = &resp->xdr;
3160
3161 if (!nfserr)
3162 nfserr = nfsd4_encode_stateid(xdr, &locku->lu_stateid);
3163
3164 return nfserr;
3165 }
3166
3167
3168 static __be32
3169 nfsd4_encode_link(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_link *link)
3170 {
3171 struct xdr_stream *xdr = &resp->xdr;
3172 __be32 *p;
3173
3174 if (!nfserr) {
3175 p = xdr_reserve_space(xdr, 20);
3176 if (!p)
3177 return nfserr_resource;
3178 p = encode_cinfo(p, &link->li_cinfo);
3179 }
3180 return nfserr;
3181 }
3182
3183
3184 static __be32
3185 nfsd4_encode_open(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open *open)
3186 {
3187 struct xdr_stream *xdr = &resp->xdr;
3188 __be32 *p;
3189
3190 if (nfserr)
3191 goto out;
3192
3193 nfserr = nfsd4_encode_stateid(xdr, &open->op_stateid);
3194 if (nfserr)
3195 goto out;
3196 p = xdr_reserve_space(xdr, 40);
3197 if (!p)
3198 return nfserr_resource;
3199 p = encode_cinfo(p, &open->op_cinfo);
3200 *p++ = cpu_to_be32(open->op_rflags);
3201 *p++ = cpu_to_be32(2);
3202 *p++ = cpu_to_be32(open->op_bmval[0]);
3203 *p++ = cpu_to_be32(open->op_bmval[1]);
3204 *p++ = cpu_to_be32(open->op_delegate_type);
3205
3206 switch (open->op_delegate_type) {
3207 case NFS4_OPEN_DELEGATE_NONE:
3208 break;
3209 case NFS4_OPEN_DELEGATE_READ:
3210 nfserr = nfsd4_encode_stateid(xdr, &open->op_delegate_stateid);
3211 if (nfserr)
3212 return nfserr;
3213 p = xdr_reserve_space(xdr, 20);
3214 if (!p)
3215 return nfserr_resource;
3216 *p++ = cpu_to_be32(open->op_recall);
3217
3218 /*
3219 * TODO: ACE's in delegations
3220 */
3221 *p++ = cpu_to_be32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
3222 *p++ = cpu_to_be32(0);
3223 *p++ = cpu_to_be32(0);
3224 *p++ = cpu_to_be32(0); /* XXX: is NULL principal ok? */
3225 break;
3226 case NFS4_OPEN_DELEGATE_WRITE:
3227 nfserr = nfsd4_encode_stateid(xdr, &open->op_delegate_stateid);
3228 if (nfserr)
3229 return nfserr;
3230 p = xdr_reserve_space(xdr, 32);
3231 if (!p)
3232 return nfserr_resource;
3233 *p++ = cpu_to_be32(0);
3234
3235 /*
3236 * TODO: space_limit's in delegations
3237 */
3238 *p++ = cpu_to_be32(NFS4_LIMIT_SIZE);
3239 *p++ = cpu_to_be32(~(u32)0);
3240 *p++ = cpu_to_be32(~(u32)0);
3241
3242 /*
3243 * TODO: ACE's in delegations
3244 */
3245 *p++ = cpu_to_be32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
3246 *p++ = cpu_to_be32(0);
3247 *p++ = cpu_to_be32(0);
3248 *p++ = cpu_to_be32(0); /* XXX: is NULL principal ok? */
3249 break;
3250 case NFS4_OPEN_DELEGATE_NONE_EXT: /* 4.1 */
3251 switch (open->op_why_no_deleg) {
3252 case WND4_CONTENTION:
3253 case WND4_RESOURCE:
3254 p = xdr_reserve_space(xdr, 8);
3255 if (!p)
3256 return nfserr_resource;
3257 *p++ = cpu_to_be32(open->op_why_no_deleg);
3258 /* deleg signaling not supported yet: */
3259 *p++ = cpu_to_be32(0);
3260 break;
3261 default:
3262 p = xdr_reserve_space(xdr, 4);
3263 if (!p)
3264 return nfserr_resource;
3265 *p++ = cpu_to_be32(open->op_why_no_deleg);
3266 }
3267 break;
3268 default:
3269 BUG();
3270 }
3271 /* XXX save filehandle here */
3272 out:
3273 return nfserr;
3274 }
3275
3276 static __be32
3277 nfsd4_encode_open_confirm(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_confirm *oc)
3278 {
3279 struct xdr_stream *xdr = &resp->xdr;
3280
3281 if (!nfserr)
3282 nfserr = nfsd4_encode_stateid(xdr, &oc->oc_resp_stateid);
3283
3284 return nfserr;
3285 }
3286
3287 static __be32
3288 nfsd4_encode_open_downgrade(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_downgrade *od)
3289 {
3290 struct xdr_stream *xdr = &resp->xdr;
3291
3292 if (!nfserr)
3293 nfserr = nfsd4_encode_stateid(xdr, &od->od_stateid);
3294
3295 return nfserr;
3296 }
3297
3298 static __be32 nfsd4_encode_splice_read(
3299 struct nfsd4_compoundres *resp,
3300 struct nfsd4_read *read,
3301 struct file *file, unsigned long maxcount)
3302 {
3303 struct xdr_stream *xdr = &resp->xdr;
3304 struct xdr_buf *buf = xdr->buf;
3305 u32 eof;
3306 int space_left;
3307 __be32 nfserr;
3308 __be32 *p = xdr->p - 2;
3309
3310 /* Make sure there will be room for padding if needed */
3311 if (xdr->end - xdr->p < 1)
3312 return nfserr_resource;
3313
3314 nfserr = nfsd_splice_read(read->rd_rqstp, file,
3315 read->rd_offset, &maxcount);
3316 if (nfserr) {
3317 /*
3318 * nfsd_splice_actor may have already messed with the
3319 * page length; reset it so as not to confuse
3320 * xdr_truncate_encode:
3321 */
3322 buf->page_len = 0;
3323 return nfserr;
3324 }
3325
3326 eof = (read->rd_offset + maxcount >=
3327 d_inode(read->rd_fhp->fh_dentry)->i_size);
3328
3329 *(p++) = htonl(eof);
3330 *(p++) = htonl(maxcount);
3331
3332 buf->page_len = maxcount;
3333 buf->len += maxcount;
3334 xdr->page_ptr += (buf->page_base + maxcount + PAGE_SIZE - 1)
3335 / PAGE_SIZE;
3336
3337 /* Use rest of head for padding and remaining ops: */
3338 buf->tail[0].iov_base = xdr->p;
3339 buf->tail[0].iov_len = 0;
3340 xdr->iov = buf->tail;
3341 if (maxcount&3) {
3342 int pad = 4 - (maxcount&3);
3343
3344 *(xdr->p++) = 0;
3345
3346 buf->tail[0].iov_base += maxcount&3;
3347 buf->tail[0].iov_len = pad;
3348 buf->len += pad;
3349 }
3350
3351 space_left = min_t(int, (void *)xdr->end - (void *)xdr->p,
3352 buf->buflen - buf->len);
3353 buf->buflen = buf->len + space_left;
3354 xdr->end = (__be32 *)((void *)xdr->end + space_left);
3355
3356 return 0;
3357 }
3358
3359 static __be32 nfsd4_encode_readv(struct nfsd4_compoundres *resp,
3360 struct nfsd4_read *read,
3361 struct file *file, unsigned long maxcount)
3362 {
3363 struct xdr_stream *xdr = &resp->xdr;
3364 u32 eof;
3365 int v;
3366 int starting_len = xdr->buf->len - 8;
3367 long len;
3368 int thislen;
3369 __be32 nfserr;
3370 __be32 tmp;
3371 __be32 *p;
3372 u32 zzz = 0;
3373 int pad;
3374
3375 len = maxcount;
3376 v = 0;
3377
3378 thislen = min_t(long, len, ((void *)xdr->end - (void *)xdr->p));
3379 p = xdr_reserve_space(xdr, (thislen+3)&~3);
3380 WARN_ON_ONCE(!p);
3381 resp->rqstp->rq_vec[v].iov_base = p;
3382 resp->rqstp->rq_vec[v].iov_len = thislen;
3383 v++;
3384 len -= thislen;
3385
3386 while (len) {
3387 thislen = min_t(long, len, PAGE_SIZE);
3388 p = xdr_reserve_space(xdr, (thislen+3)&~3);
3389 WARN_ON_ONCE(!p);
3390 resp->rqstp->rq_vec[v].iov_base = p;
3391 resp->rqstp->rq_vec[v].iov_len = thislen;
3392 v++;
3393 len -= thislen;
3394 }
3395 read->rd_vlen = v;
3396
3397 nfserr = nfsd_readv(file, read->rd_offset, resp->rqstp->rq_vec,
3398 read->rd_vlen, &maxcount);
3399 if (nfserr)
3400 return nfserr;
3401 xdr_truncate_encode(xdr, starting_len + 8 + ((maxcount+3)&~3));
3402
3403 eof = (read->rd_offset + maxcount >=
3404 d_inode(read->rd_fhp->fh_dentry)->i_size);
3405
3406 tmp = htonl(eof);
3407 write_bytes_to_xdr_buf(xdr->buf, starting_len , &tmp, 4);
3408 tmp = htonl(maxcount);
3409 write_bytes_to_xdr_buf(xdr->buf, starting_len + 4, &tmp, 4);
3410
3411 pad = (maxcount&3) ? 4 - (maxcount&3) : 0;
3412 write_bytes_to_xdr_buf(xdr->buf, starting_len + 8 + maxcount,
3413 &zzz, pad);
3414 return 0;
3415
3416 }
3417
3418 static __be32
3419 nfsd4_encode_read(struct nfsd4_compoundres *resp, __be32 nfserr,
3420 struct nfsd4_read *read)
3421 {
3422 unsigned long maxcount;
3423 struct xdr_stream *xdr = &resp->xdr;
3424 struct file *file = read->rd_filp;
3425 struct svc_fh *fhp = read->rd_fhp;
3426 int starting_len = xdr->buf->len;
3427 struct raparms *ra;
3428 __be32 *p;
3429 __be32 err;
3430
3431 if (nfserr)
3432 return nfserr;
3433
3434 p = xdr_reserve_space(xdr, 8); /* eof flag and byte count */
3435 if (!p) {
3436 WARN_ON_ONCE(test_bit(RQ_SPLICE_OK, &resp->rqstp->rq_flags));
3437 return nfserr_resource;
3438 }
3439 if (resp->xdr.buf->page_len && test_bit(RQ_SPLICE_OK, &resp->rqstp->rq_flags)) {
3440 WARN_ON_ONCE(1);
3441 return nfserr_resource;
3442 }
3443 xdr_commit_encode(xdr);
3444
3445 maxcount = svc_max_payload(resp->rqstp);
3446 maxcount = min_t(unsigned long, maxcount, (xdr->buf->buflen - xdr->buf->len));
3447 maxcount = min_t(unsigned long, maxcount, read->rd_length);
3448
3449 if (read->rd_filp)
3450 err = nfsd_permission(resp->rqstp, fhp->fh_export,
3451 fhp->fh_dentry,
3452 NFSD_MAY_READ|NFSD_MAY_OWNER_OVERRIDE);
3453 else
3454 err = nfsd_get_tmp_read_open(resp->rqstp, read->rd_fhp,
3455 &file, &ra);
3456 if (err)
3457 goto err_truncate;
3458
3459 if (file->f_op->splice_read && test_bit(RQ_SPLICE_OK, &resp->rqstp->rq_flags))
3460 err = nfsd4_encode_splice_read(resp, read, file, maxcount);
3461 else
3462 err = nfsd4_encode_readv(resp, read, file, maxcount);
3463
3464 if (!read->rd_filp)
3465 nfsd_put_tmp_read_open(file, ra);
3466
3467 err_truncate:
3468 if (err)
3469 xdr_truncate_encode(xdr, starting_len);
3470 return err;
3471 }
3472
3473 static __be32
3474 nfsd4_encode_readlink(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readlink *readlink)
3475 {
3476 int maxcount;
3477 __be32 wire_count;
3478 int zero = 0;
3479 struct xdr_stream *xdr = &resp->xdr;
3480 int length_offset = xdr->buf->len;
3481 __be32 *p;
3482
3483 if (nfserr)
3484 return nfserr;
3485
3486 p = xdr_reserve_space(xdr, 4);
3487 if (!p)
3488 return nfserr_resource;
3489 maxcount = PAGE_SIZE;
3490
3491 p = xdr_reserve_space(xdr, maxcount);
3492 if (!p)
3493 return nfserr_resource;
3494 /*
3495 * XXX: By default, the ->readlink() VFS op will truncate symlinks
3496 * if they would overflow the buffer. Is this kosher in NFSv4? If
3497 * not, one easy fix is: if ->readlink() precisely fills the buffer,
3498 * assume that truncation occurred, and return NFS4ERR_RESOURCE.
3499 */
3500 nfserr = nfsd_readlink(readlink->rl_rqstp, readlink->rl_fhp,
3501 (char *)p, &maxcount);
3502 if (nfserr == nfserr_isdir)
3503 nfserr = nfserr_inval;
3504 if (nfserr) {
3505 xdr_truncate_encode(xdr, length_offset);
3506 return nfserr;
3507 }
3508
3509 wire_count = htonl(maxcount);
3510 write_bytes_to_xdr_buf(xdr->buf, length_offset, &wire_count, 4);
3511 xdr_truncate_encode(xdr, length_offset + 4 + ALIGN(maxcount, 4));
3512 if (maxcount & 3)
3513 write_bytes_to_xdr_buf(xdr->buf, length_offset + 4 + maxcount,
3514 &zero, 4 - (maxcount&3));
3515 return 0;
3516 }
3517
3518 static __be32
3519 nfsd4_encode_readdir(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readdir *readdir)
3520 {
3521 int maxcount;
3522 int bytes_left;
3523 loff_t offset;
3524 __be64 wire_offset;
3525 struct xdr_stream *xdr = &resp->xdr;
3526 int starting_len = xdr->buf->len;
3527 __be32 *p;
3528
3529 if (nfserr)
3530 return nfserr;
3531
3532 p = xdr_reserve_space(xdr, NFS4_VERIFIER_SIZE);
3533 if (!p)
3534 return nfserr_resource;
3535
3536 /* XXX: Following NFSv3, we ignore the READDIR verifier for now. */
3537 *p++ = cpu_to_be32(0);
3538 *p++ = cpu_to_be32(0);
3539 resp->xdr.buf->head[0].iov_len = ((char *)resp->xdr.p)
3540 - (char *)resp->xdr.buf->head[0].iov_base;
3541
3542 /*
3543 * Number of bytes left for directory entries allowing for the
3544 * final 8 bytes of the readdir and a following failed op:
3545 */
3546 bytes_left = xdr->buf->buflen - xdr->buf->len
3547 - COMPOUND_ERR_SLACK_SPACE - 8;
3548 if (bytes_left < 0) {
3549 nfserr = nfserr_resource;
3550 goto err_no_verf;
3551 }
3552 maxcount = min_t(u32, readdir->rd_maxcount, INT_MAX);
3553 /*
3554 * Note the rfc defines rd_maxcount as the size of the
3555 * READDIR4resok structure, which includes the verifier above
3556 * and the 8 bytes encoded at the end of this function:
3557 */
3558 if (maxcount < 16) {
3559 nfserr = nfserr_toosmall;
3560 goto err_no_verf;
3561 }
3562 maxcount = min_t(int, maxcount-16, bytes_left);
3563
3564 /* RFC 3530 14.2.24 allows us to ignore dircount when it's 0: */
3565 if (!readdir->rd_dircount)
3566 readdir->rd_dircount = INT_MAX;
3567
3568 readdir->xdr = xdr;
3569 readdir->rd_maxcount = maxcount;
3570 readdir->common.err = 0;
3571 readdir->cookie_offset = 0;
3572
3573 offset = readdir->rd_cookie;
3574 nfserr = nfsd_readdir(readdir->rd_rqstp, readdir->rd_fhp,
3575 &offset,
3576 &readdir->common, nfsd4_encode_dirent);
3577 if (nfserr == nfs_ok &&
3578 readdir->common.err == nfserr_toosmall &&
3579 xdr->buf->len == starting_len + 8) {
3580 /* nothing encoded; which limit did we hit?: */
3581 if (maxcount - 16 < bytes_left)
3582 /* It was the fault of rd_maxcount: */
3583 nfserr = nfserr_toosmall;
3584 else
3585 /* We ran out of buffer space: */
3586 nfserr = nfserr_resource;
3587 }
3588 if (nfserr)
3589 goto err_no_verf;
3590
3591 if (readdir->cookie_offset) {
3592 wire_offset = cpu_to_be64(offset);
3593 write_bytes_to_xdr_buf(xdr->buf, readdir->cookie_offset,
3594 &wire_offset, 8);
3595 }
3596
3597 p = xdr_reserve_space(xdr, 8);
3598 if (!p) {
3599 WARN_ON_ONCE(1);
3600 goto err_no_verf;
3601 }
3602 *p++ = 0; /* no more entries */
3603 *p++ = htonl(readdir->common.err == nfserr_eof);
3604
3605 return 0;
3606 err_no_verf:
3607 xdr_truncate_encode(xdr, starting_len);
3608 return nfserr;
3609 }
3610
3611 static __be32
3612 nfsd4_encode_remove(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_remove *remove)
3613 {
3614 struct xdr_stream *xdr = &resp->xdr;
3615 __be32 *p;
3616
3617 if (!nfserr) {
3618 p = xdr_reserve_space(xdr, 20);
3619 if (!p)
3620 return nfserr_resource;
3621 p = encode_cinfo(p, &remove->rm_cinfo);
3622 }
3623 return nfserr;
3624 }
3625
3626 static __be32
3627 nfsd4_encode_rename(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_rename *rename)
3628 {
3629 struct xdr_stream *xdr = &resp->xdr;
3630 __be32 *p;
3631
3632 if (!nfserr) {
3633 p = xdr_reserve_space(xdr, 40);
3634 if (!p)
3635 return nfserr_resource;
3636 p = encode_cinfo(p, &rename->rn_sinfo);
3637 p = encode_cinfo(p, &rename->rn_tinfo);
3638 }
3639 return nfserr;
3640 }
3641
3642 static __be32
3643 nfsd4_do_encode_secinfo(struct xdr_stream *xdr,
3644 __be32 nfserr, struct svc_export *exp)
3645 {
3646 u32 i, nflavs, supported;
3647 struct exp_flavor_info *flavs;
3648 struct exp_flavor_info def_flavs[2];
3649 __be32 *p, *flavorsp;
3650 static bool report = true;
3651
3652 if (nfserr)
3653 goto out;
3654 nfserr = nfserr_resource;
3655 if (exp->ex_nflavors) {
3656 flavs = exp->ex_flavors;
3657 nflavs = exp->ex_nflavors;
3658 } else { /* Handling of some defaults in absence of real secinfo: */
3659 flavs = def_flavs;
3660 if (exp->ex_client->flavour->flavour == RPC_AUTH_UNIX) {
3661 nflavs = 2;
3662 flavs[0].pseudoflavor = RPC_AUTH_UNIX;
3663 flavs[1].pseudoflavor = RPC_AUTH_NULL;
3664 } else if (exp->ex_client->flavour->flavour == RPC_AUTH_GSS) {
3665 nflavs = 1;
3666 flavs[0].pseudoflavor
3667 = svcauth_gss_flavor(exp->ex_client);
3668 } else {
3669 nflavs = 1;
3670 flavs[0].pseudoflavor
3671 = exp->ex_client->flavour->flavour;
3672 }
3673 }
3674
3675 supported = 0;
3676 p = xdr_reserve_space(xdr, 4);
3677 if (!p)
3678 goto out;
3679 flavorsp = p++; /* to be backfilled later */
3680
3681 for (i = 0; i < nflavs; i++) {
3682 rpc_authflavor_t pf = flavs[i].pseudoflavor;
3683 struct rpcsec_gss_info info;
3684
3685 if (rpcauth_get_gssinfo(pf, &info) == 0) {
3686 supported++;
3687 p = xdr_reserve_space(xdr, 4 + 4 +
3688 XDR_LEN(info.oid.len) + 4 + 4);
3689 if (!p)
3690 goto out;
3691 *p++ = cpu_to_be32(RPC_AUTH_GSS);
3692 p = xdr_encode_opaque(p, info.oid.data, info.oid.len);
3693 *p++ = cpu_to_be32(info.qop);
3694 *p++ = cpu_to_be32(info.service);
3695 } else if (pf < RPC_AUTH_MAXFLAVOR) {
3696 supported++;
3697 p = xdr_reserve_space(xdr, 4);
3698 if (!p)
3699 goto out;
3700 *p++ = cpu_to_be32(pf);
3701 } else {
3702 if (report)
3703 pr_warn("NFS: SECINFO: security flavor %u "
3704 "is not supported\n", pf);
3705 }
3706 }
3707
3708 if (nflavs != supported)
3709 report = false;
3710 *flavorsp = htonl(supported);
3711 nfserr = 0;
3712 out:
3713 if (exp)
3714 exp_put(exp);
3715 return nfserr;
3716 }
3717
3718 static __be32
3719 nfsd4_encode_secinfo(struct nfsd4_compoundres *resp, __be32 nfserr,
3720 struct nfsd4_secinfo *secinfo)
3721 {
3722 struct xdr_stream *xdr = &resp->xdr;
3723
3724 return nfsd4_do_encode_secinfo(xdr, nfserr, secinfo->si_exp);
3725 }
3726
3727 static __be32
3728 nfsd4_encode_secinfo_no_name(struct nfsd4_compoundres *resp, __be32 nfserr,
3729 struct nfsd4_secinfo_no_name *secinfo)
3730 {
3731 struct xdr_stream *xdr = &resp->xdr;
3732
3733 return nfsd4_do_encode_secinfo(xdr, nfserr, secinfo->sin_exp);
3734 }
3735
3736 /*
3737 * The SETATTR encode routine is special -- it always encodes a bitmap,
3738 * regardless of the error status.
3739 */
3740 static __be32
3741 nfsd4_encode_setattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setattr *setattr)
3742 {
3743 struct xdr_stream *xdr = &resp->xdr;
3744 __be32 *p;
3745
3746 p = xdr_reserve_space(xdr, 16);
3747 if (!p)
3748 return nfserr_resource;
3749 if (nfserr) {
3750 *p++ = cpu_to_be32(3);
3751 *p++ = cpu_to_be32(0);
3752 *p++ = cpu_to_be32(0);
3753 *p++ = cpu_to_be32(0);
3754 }
3755 else {
3756 *p++ = cpu_to_be32(3);
3757 *p++ = cpu_to_be32(setattr->sa_bmval[0]);
3758 *p++ = cpu_to_be32(setattr->sa_bmval[1]);
3759 *p++ = cpu_to_be32(setattr->sa_bmval[2]);
3760 }
3761 return nfserr;
3762 }
3763
3764 static __be32
3765 nfsd4_encode_setclientid(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setclientid *scd)
3766 {
3767 struct xdr_stream *xdr = &resp->xdr;
3768 __be32 *p;
3769
3770 if (!nfserr) {
3771 p = xdr_reserve_space(xdr, 8 + NFS4_VERIFIER_SIZE);
3772 if (!p)
3773 return nfserr_resource;
3774 p = xdr_encode_opaque_fixed(p, &scd->se_clientid, 8);
3775 p = xdr_encode_opaque_fixed(p, &scd->se_confirm,
3776 NFS4_VERIFIER_SIZE);
3777 }
3778 else if (nfserr == nfserr_clid_inuse) {
3779 p = xdr_reserve_space(xdr, 8);
3780 if (!p)
3781 return nfserr_resource;
3782 *p++ = cpu_to_be32(0);
3783 *p++ = cpu_to_be32(0);
3784 }
3785 return nfserr;
3786 }
3787
3788 static __be32
3789 nfsd4_encode_write(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_write *write)
3790 {
3791 struct xdr_stream *xdr = &resp->xdr;
3792 __be32 *p;
3793
3794 if (!nfserr) {
3795 p = xdr_reserve_space(xdr, 16);
3796 if (!p)
3797 return nfserr_resource;
3798 *p++ = cpu_to_be32(write->wr_bytes_written);
3799 *p++ = cpu_to_be32(write->wr_how_written);
3800 p = xdr_encode_opaque_fixed(p, write->wr_verifier.data,
3801 NFS4_VERIFIER_SIZE);
3802 }
3803 return nfserr;
3804 }
3805
3806 static const u32 nfs4_minimal_spo_must_enforce[2] = {
3807 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) |
3808 1 << (OP_EXCHANGE_ID - 32) |
3809 1 << (OP_CREATE_SESSION - 32) |
3810 1 << (OP_DESTROY_SESSION - 32) |
3811 1 << (OP_DESTROY_CLIENTID - 32)
3812 };
3813
3814 static __be32
3815 nfsd4_encode_exchange_id(struct nfsd4_compoundres *resp, __be32 nfserr,
3816 struct nfsd4_exchange_id *exid)
3817 {
3818 struct xdr_stream *xdr = &resp->xdr;
3819 __be32 *p;
3820 char *major_id;
3821 char *server_scope;
3822 int major_id_sz;
3823 int server_scope_sz;
3824 uint64_t minor_id = 0;
3825
3826 if (nfserr)
3827 return nfserr;
3828
3829 major_id = utsname()->nodename;
3830 major_id_sz = strlen(major_id);
3831 server_scope = utsname()->nodename;
3832 server_scope_sz = strlen(server_scope);
3833
3834 p = xdr_reserve_space(xdr,
3835 8 /* eir_clientid */ +
3836 4 /* eir_sequenceid */ +
3837 4 /* eir_flags */ +
3838 4 /* spr_how */);
3839 if (!p)
3840 return nfserr_resource;
3841
3842 p = xdr_encode_opaque_fixed(p, &exid->clientid, 8);
3843 *p++ = cpu_to_be32(exid->seqid);
3844 *p++ = cpu_to_be32(exid->flags);
3845
3846 *p++ = cpu_to_be32(exid->spa_how);
3847
3848 switch (exid->spa_how) {
3849 case SP4_NONE:
3850 break;
3851 case SP4_MACH_CRED:
3852 /* spo_must_enforce, spo_must_allow */
3853 p = xdr_reserve_space(xdr, 16);
3854 if (!p)
3855 return nfserr_resource;
3856
3857 /* spo_must_enforce bitmap: */
3858 *p++ = cpu_to_be32(2);
3859 *p++ = cpu_to_be32(nfs4_minimal_spo_must_enforce[0]);
3860 *p++ = cpu_to_be32(nfs4_minimal_spo_must_enforce[1]);
3861 /* empty spo_must_allow bitmap: */
3862 *p++ = cpu_to_be32(0);
3863
3864 break;
3865 default:
3866 WARN_ON_ONCE(1);
3867 }
3868
3869 p = xdr_reserve_space(xdr,
3870 8 /* so_minor_id */ +
3871 4 /* so_major_id.len */ +
3872 (XDR_QUADLEN(major_id_sz) * 4) +
3873 4 /* eir_server_scope.len */ +
3874 (XDR_QUADLEN(server_scope_sz) * 4) +
3875 4 /* eir_server_impl_id.count (0) */);
3876 if (!p)
3877 return nfserr_resource;
3878
3879 /* The server_owner struct */
3880 p = xdr_encode_hyper(p, minor_id); /* Minor id */
3881 /* major id */
3882 p = xdr_encode_opaque(p, major_id, major_id_sz);
3883
3884 /* Server scope */
3885 p = xdr_encode_opaque(p, server_scope, server_scope_sz);
3886
3887 /* Implementation id */
3888 *p++ = cpu_to_be32(0); /* zero length nfs_impl_id4 array */
3889 return 0;
3890 }
3891
3892 static __be32
3893 nfsd4_encode_create_session(struct nfsd4_compoundres *resp, __be32 nfserr,
3894 struct nfsd4_create_session *sess)
3895 {
3896 struct xdr_stream *xdr = &resp->xdr;
3897 __be32 *p;
3898
3899 if (nfserr)
3900 return nfserr;
3901
3902 p = xdr_reserve_space(xdr, 24);
3903 if (!p)
3904 return nfserr_resource;
3905 p = xdr_encode_opaque_fixed(p, sess->sessionid.data,
3906 NFS4_MAX_SESSIONID_LEN);
3907 *p++ = cpu_to_be32(sess->seqid);
3908 *p++ = cpu_to_be32(sess->flags);
3909
3910 p = xdr_reserve_space(xdr, 28);
3911 if (!p)
3912 return nfserr_resource;
3913 *p++ = cpu_to_be32(0); /* headerpadsz */
3914 *p++ = cpu_to_be32(sess->fore_channel.maxreq_sz);
3915 *p++ = cpu_to_be32(sess->fore_channel.maxresp_sz);
3916 *p++ = cpu_to_be32(sess->fore_channel.maxresp_cached);
3917 *p++ = cpu_to_be32(sess->fore_channel.maxops);
3918 *p++ = cpu_to_be32(sess->fore_channel.maxreqs);
3919 *p++ = cpu_to_be32(sess->fore_channel.nr_rdma_attrs);
3920
3921 if (sess->fore_channel.nr_rdma_attrs) {
3922 p = xdr_reserve_space(xdr, 4);
3923 if (!p)
3924 return nfserr_resource;
3925 *p++ = cpu_to_be32(sess->fore_channel.rdma_attrs);
3926 }
3927
3928 p = xdr_reserve_space(xdr, 28);
3929 if (!p)
3930 return nfserr_resource;
3931 *p++ = cpu_to_be32(0); /* headerpadsz */
3932 *p++ = cpu_to_be32(sess->back_channel.maxreq_sz);
3933 *p++ = cpu_to_be32(sess->back_channel.maxresp_sz);
3934 *p++ = cpu_to_be32(sess->back_channel.maxresp_cached);
3935 *p++ = cpu_to_be32(sess->back_channel.maxops);
3936 *p++ = cpu_to_be32(sess->back_channel.maxreqs);
3937 *p++ = cpu_to_be32(sess->back_channel.nr_rdma_attrs);
3938
3939 if (sess->back_channel.nr_rdma_attrs) {
3940 p = xdr_reserve_space(xdr, 4);
3941 if (!p)
3942 return nfserr_resource;
3943 *p++ = cpu_to_be32(sess->back_channel.rdma_attrs);
3944 }
3945 return 0;
3946 }
3947
3948 static __be32
3949 nfsd4_encode_sequence(struct nfsd4_compoundres *resp, __be32 nfserr,
3950 struct nfsd4_sequence *seq)
3951 {
3952 struct xdr_stream *xdr = &resp->xdr;
3953 __be32 *p;
3954
3955 if (nfserr)
3956 return nfserr;
3957
3958 p = xdr_reserve_space(xdr, NFS4_MAX_SESSIONID_LEN + 20);
3959 if (!p)
3960 return nfserr_resource;
3961 p = xdr_encode_opaque_fixed(p, seq->sessionid.data,
3962 NFS4_MAX_SESSIONID_LEN);
3963 *p++ = cpu_to_be32(seq->seqid);
3964 *p++ = cpu_to_be32(seq->slotid);
3965 /* Note slotid's are numbered from zero: */
3966 *p++ = cpu_to_be32(seq->maxslots - 1); /* sr_highest_slotid */
3967 *p++ = cpu_to_be32(seq->maxslots - 1); /* sr_target_highest_slotid */
3968 *p++ = cpu_to_be32(seq->status_flags);
3969
3970 resp->cstate.data_offset = xdr->buf->len; /* DRC cache data pointer */
3971 return 0;
3972 }
3973
3974 static __be32
3975 nfsd4_encode_test_stateid(struct nfsd4_compoundres *resp, __be32 nfserr,
3976 struct nfsd4_test_stateid *test_stateid)
3977 {
3978 struct xdr_stream *xdr = &resp->xdr;
3979 struct nfsd4_test_stateid_id *stateid, *next;
3980 __be32 *p;
3981
3982 if (nfserr)
3983 return nfserr;
3984
3985 p = xdr_reserve_space(xdr, 4 + (4 * test_stateid->ts_num_ids));
3986 if (!p)
3987 return nfserr_resource;
3988 *p++ = htonl(test_stateid->ts_num_ids);
3989
3990 list_for_each_entry_safe(stateid, next, &test_stateid->ts_stateid_list, ts_id_list) {
3991 *p++ = stateid->ts_id_status;
3992 }
3993
3994 return nfserr;
3995 }
3996
3997 #ifdef CONFIG_NFSD_PNFS
3998 static __be32
3999 nfsd4_encode_getdeviceinfo(struct nfsd4_compoundres *resp, __be32 nfserr,
4000 struct nfsd4_getdeviceinfo *gdev)
4001 {
4002 struct xdr_stream *xdr = &resp->xdr;
4003 const struct nfsd4_layout_ops *ops =
4004 nfsd4_layout_ops[gdev->gd_layout_type];
4005 u32 starting_len = xdr->buf->len, needed_len;
4006 __be32 *p;
4007
4008 dprintk("%s: err %d\n", __func__, nfserr);
4009 if (nfserr)
4010 goto out;
4011
4012 nfserr = nfserr_resource;
4013 p = xdr_reserve_space(xdr, 4);
4014 if (!p)
4015 goto out;
4016
4017 *p++ = cpu_to_be32(gdev->gd_layout_type);
4018
4019 /* If maxcount is 0 then just update notifications */
4020 if (gdev->gd_maxcount != 0) {
4021 nfserr = ops->encode_getdeviceinfo(xdr, gdev);
4022 if (nfserr) {
4023 /*
4024 * We don't bother to burden the layout drivers with
4025 * enforcing gd_maxcount, just tell the client to
4026 * come back with a bigger buffer if it's not enough.
4027 */
4028 if (xdr->buf->len + 4 > gdev->gd_maxcount)
4029 goto toosmall;
4030 goto out;
4031 }
4032 }
4033
4034 nfserr = nfserr_resource;
4035 if (gdev->gd_notify_types) {
4036 p = xdr_reserve_space(xdr, 4 + 4);
4037 if (!p)
4038 goto out;
4039 *p++ = cpu_to_be32(1); /* bitmap length */
4040 *p++ = cpu_to_be32(gdev->gd_notify_types);
4041 } else {
4042 p = xdr_reserve_space(xdr, 4);
4043 if (!p)
4044 goto out;
4045 *p++ = 0;
4046 }
4047
4048 nfserr = 0;
4049 out:
4050 kfree(gdev->gd_device);
4051 dprintk("%s: done: %d\n", __func__, be32_to_cpu(nfserr));
4052 return nfserr;
4053
4054 toosmall:
4055 dprintk("%s: maxcount too small\n", __func__);
4056 needed_len = xdr->buf->len + 4 /* notifications */;
4057 xdr_truncate_encode(xdr, starting_len);
4058 p = xdr_reserve_space(xdr, 4);
4059 if (!p) {
4060 nfserr = nfserr_resource;
4061 } else {
4062 *p++ = cpu_to_be32(needed_len);
4063 nfserr = nfserr_toosmall;
4064 }
4065 goto out;
4066 }
4067
4068 static __be32
4069 nfsd4_encode_layoutget(struct nfsd4_compoundres *resp, __be32 nfserr,
4070 struct nfsd4_layoutget *lgp)
4071 {
4072 struct xdr_stream *xdr = &resp->xdr;
4073 const struct nfsd4_layout_ops *ops =
4074 nfsd4_layout_ops[lgp->lg_layout_type];
4075 __be32 *p;
4076
4077 dprintk("%s: err %d\n", __func__, nfserr);
4078 if (nfserr)
4079 goto out;
4080
4081 nfserr = nfserr_resource;
4082 p = xdr_reserve_space(xdr, 36 + sizeof(stateid_opaque_t));
4083 if (!p)
4084 goto out;
4085
4086 *p++ = cpu_to_be32(1); /* we always set return-on-close */
4087 *p++ = cpu_to_be32(lgp->lg_sid.si_generation);
4088 p = xdr_encode_opaque_fixed(p, &lgp->lg_sid.si_opaque,
4089 sizeof(stateid_opaque_t));
4090
4091 *p++ = cpu_to_be32(1); /* we always return a single layout */
4092 p = xdr_encode_hyper(p, lgp->lg_seg.offset);
4093 p = xdr_encode_hyper(p, lgp->lg_seg.length);
4094 *p++ = cpu_to_be32(lgp->lg_seg.iomode);
4095 *p++ = cpu_to_be32(lgp->lg_layout_type);
4096
4097 nfserr = ops->encode_layoutget(xdr, lgp);
4098 out:
4099 kfree(lgp->lg_content);
4100 return nfserr;
4101 }
4102
4103 static __be32
4104 nfsd4_encode_layoutcommit(struct nfsd4_compoundres *resp, __be32 nfserr,
4105 struct nfsd4_layoutcommit *lcp)
4106 {
4107 struct xdr_stream *xdr = &resp->xdr;
4108 __be32 *p;
4109
4110 if (nfserr)
4111 return nfserr;
4112
4113 p = xdr_reserve_space(xdr, 4);
4114 if (!p)
4115 return nfserr_resource;
4116 *p++ = cpu_to_be32(lcp->lc_size_chg);
4117 if (lcp->lc_size_chg) {
4118 p = xdr_reserve_space(xdr, 8);
4119 if (!p)
4120 return nfserr_resource;
4121 p = xdr_encode_hyper(p, lcp->lc_newsize);
4122 }
4123
4124 return nfs_ok;
4125 }
4126
4127 static __be32
4128 nfsd4_encode_layoutreturn(struct nfsd4_compoundres *resp, __be32 nfserr,
4129 struct nfsd4_layoutreturn *lrp)
4130 {
4131 struct xdr_stream *xdr = &resp->xdr;
4132 __be32 *p;
4133
4134 if (nfserr)
4135 return nfserr;
4136
4137 p = xdr_reserve_space(xdr, 4);
4138 if (!p)
4139 return nfserr_resource;
4140 *p++ = cpu_to_be32(lrp->lrs_present);
4141 if (lrp->lrs_present)
4142 return nfsd4_encode_stateid(xdr, &lrp->lr_sid);
4143 return nfs_ok;
4144 }
4145 #endif /* CONFIG_NFSD_PNFS */
4146
4147 static __be32
4148 nfsd4_encode_seek(struct nfsd4_compoundres *resp, __be32 nfserr,
4149 struct nfsd4_seek *seek)
4150 {
4151 __be32 *p;
4152
4153 if (nfserr)
4154 return nfserr;
4155
4156 p = xdr_reserve_space(&resp->xdr, 4 + 8);
4157 *p++ = cpu_to_be32(seek->seek_eof);
4158 p = xdr_encode_hyper(p, seek->seek_pos);
4159
4160 return nfserr;
4161 }
4162
4163 static __be32
4164 nfsd4_encode_noop(struct nfsd4_compoundres *resp, __be32 nfserr, void *p)
4165 {
4166 return nfserr;
4167 }
4168
4169 typedef __be32(* nfsd4_enc)(struct nfsd4_compoundres *, __be32, void *);
4170
4171 /*
4172 * Note: nfsd4_enc_ops vector is shared for v4.0 and v4.1
4173 * since we don't need to filter out obsolete ops as this is
4174 * done in the decoding phase.
4175 */
4176 static nfsd4_enc nfsd4_enc_ops[] = {
4177 [OP_ACCESS] = (nfsd4_enc)nfsd4_encode_access,
4178 [OP_CLOSE] = (nfsd4_enc)nfsd4_encode_close,
4179 [OP_COMMIT] = (nfsd4_enc)nfsd4_encode_commit,
4180 [OP_CREATE] = (nfsd4_enc)nfsd4_encode_create,
4181 [OP_DELEGPURGE] = (nfsd4_enc)nfsd4_encode_noop,
4182 [OP_DELEGRETURN] = (nfsd4_enc)nfsd4_encode_noop,
4183 [OP_GETATTR] = (nfsd4_enc)nfsd4_encode_getattr,
4184 [OP_GETFH] = (nfsd4_enc)nfsd4_encode_getfh,
4185 [OP_LINK] = (nfsd4_enc)nfsd4_encode_link,
4186 [OP_LOCK] = (nfsd4_enc)nfsd4_encode_lock,
4187 [OP_LOCKT] = (nfsd4_enc)nfsd4_encode_lockt,
4188 [OP_LOCKU] = (nfsd4_enc)nfsd4_encode_locku,
4189 [OP_LOOKUP] = (nfsd4_enc)nfsd4_encode_noop,
4190 [OP_LOOKUPP] = (nfsd4_enc)nfsd4_encode_noop,
4191 [OP_NVERIFY] = (nfsd4_enc)nfsd4_encode_noop,
4192 [OP_OPEN] = (nfsd4_enc)nfsd4_encode_open,
4193 [OP_OPENATTR] = (nfsd4_enc)nfsd4_encode_noop,
4194 [OP_OPEN_CONFIRM] = (nfsd4_enc)nfsd4_encode_open_confirm,
4195 [OP_OPEN_DOWNGRADE] = (nfsd4_enc)nfsd4_encode_open_downgrade,
4196 [OP_PUTFH] = (nfsd4_enc)nfsd4_encode_noop,
4197 [OP_PUTPUBFH] = (nfsd4_enc)nfsd4_encode_noop,
4198 [OP_PUTROOTFH] = (nfsd4_enc)nfsd4_encode_noop,
4199 [OP_READ] = (nfsd4_enc)nfsd4_encode_read,
4200 [OP_READDIR] = (nfsd4_enc)nfsd4_encode_readdir,
4201 [OP_READLINK] = (nfsd4_enc)nfsd4_encode_readlink,
4202 [OP_REMOVE] = (nfsd4_enc)nfsd4_encode_remove,
4203 [OP_RENAME] = (nfsd4_enc)nfsd4_encode_rename,
4204 [OP_RENEW] = (nfsd4_enc)nfsd4_encode_noop,
4205 [OP_RESTOREFH] = (nfsd4_enc)nfsd4_encode_noop,
4206 [OP_SAVEFH] = (nfsd4_enc)nfsd4_encode_noop,
4207 [OP_SECINFO] = (nfsd4_enc)nfsd4_encode_secinfo,
4208 [OP_SETATTR] = (nfsd4_enc)nfsd4_encode_setattr,
4209 [OP_SETCLIENTID] = (nfsd4_enc)nfsd4_encode_setclientid,
4210 [OP_SETCLIENTID_CONFIRM] = (nfsd4_enc)nfsd4_encode_noop,
4211 [OP_VERIFY] = (nfsd4_enc)nfsd4_encode_noop,
4212 [OP_WRITE] = (nfsd4_enc)nfsd4_encode_write,
4213 [OP_RELEASE_LOCKOWNER] = (nfsd4_enc)nfsd4_encode_noop,
4214
4215 /* NFSv4.1 operations */
4216 [OP_BACKCHANNEL_CTL] = (nfsd4_enc)nfsd4_encode_noop,
4217 [OP_BIND_CONN_TO_SESSION] = (nfsd4_enc)nfsd4_encode_bind_conn_to_session,
4218 [OP_EXCHANGE_ID] = (nfsd4_enc)nfsd4_encode_exchange_id,
4219 [OP_CREATE_SESSION] = (nfsd4_enc)nfsd4_encode_create_session,
4220 [OP_DESTROY_SESSION] = (nfsd4_enc)nfsd4_encode_noop,
4221 [OP_FREE_STATEID] = (nfsd4_enc)nfsd4_encode_noop,
4222 [OP_GET_DIR_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop,
4223 #ifdef CONFIG_NFSD_PNFS
4224 [OP_GETDEVICEINFO] = (nfsd4_enc)nfsd4_encode_getdeviceinfo,
4225 [OP_GETDEVICELIST] = (nfsd4_enc)nfsd4_encode_noop,
4226 [OP_LAYOUTCOMMIT] = (nfsd4_enc)nfsd4_encode_layoutcommit,
4227 [OP_LAYOUTGET] = (nfsd4_enc)nfsd4_encode_layoutget,
4228 [OP_LAYOUTRETURN] = (nfsd4_enc)nfsd4_encode_layoutreturn,
4229 #else
4230 [OP_GETDEVICEINFO] = (nfsd4_enc)nfsd4_encode_noop,
4231 [OP_GETDEVICELIST] = (nfsd4_enc)nfsd4_encode_noop,
4232 [OP_LAYOUTCOMMIT] = (nfsd4_enc)nfsd4_encode_noop,
4233 [OP_LAYOUTGET] = (nfsd4_enc)nfsd4_encode_noop,
4234 [OP_LAYOUTRETURN] = (nfsd4_enc)nfsd4_encode_noop,
4235 #endif
4236 [OP_SECINFO_NO_NAME] = (nfsd4_enc)nfsd4_encode_secinfo_no_name,
4237 [OP_SEQUENCE] = (nfsd4_enc)nfsd4_encode_sequence,
4238 [OP_SET_SSV] = (nfsd4_enc)nfsd4_encode_noop,
4239 [OP_TEST_STATEID] = (nfsd4_enc)nfsd4_encode_test_stateid,
4240 [OP_WANT_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop,
4241 [OP_DESTROY_CLIENTID] = (nfsd4_enc)nfsd4_encode_noop,
4242 [OP_RECLAIM_COMPLETE] = (nfsd4_enc)nfsd4_encode_noop,
4243
4244 /* NFSv4.2 operations */
4245 [OP_ALLOCATE] = (nfsd4_enc)nfsd4_encode_noop,
4246 [OP_COPY] = (nfsd4_enc)nfsd4_encode_noop,
4247 [OP_COPY_NOTIFY] = (nfsd4_enc)nfsd4_encode_noop,
4248 [OP_DEALLOCATE] = (nfsd4_enc)nfsd4_encode_noop,
4249 [OP_IO_ADVISE] = (nfsd4_enc)nfsd4_encode_noop,
4250 [OP_LAYOUTERROR] = (nfsd4_enc)nfsd4_encode_noop,
4251 [OP_LAYOUTSTATS] = (nfsd4_enc)nfsd4_encode_noop,
4252 [OP_OFFLOAD_CANCEL] = (nfsd4_enc)nfsd4_encode_noop,
4253 [OP_OFFLOAD_STATUS] = (nfsd4_enc)nfsd4_encode_noop,
4254 [OP_READ_PLUS] = (nfsd4_enc)nfsd4_encode_noop,
4255 [OP_SEEK] = (nfsd4_enc)nfsd4_encode_seek,
4256 [OP_WRITE_SAME] = (nfsd4_enc)nfsd4_encode_noop,
4257 };
4258
4259 /*
4260 * Calculate whether we still have space to encode repsize bytes.
4261 * There are two considerations:
4262 * - For NFS versions >=4.1, the size of the reply must stay within
4263 * session limits
4264 * - For all NFS versions, we must stay within limited preallocated
4265 * buffer space.
4266 *
4267 * This is called before the operation is processed, so can only provide
4268 * an upper estimate. For some nonidempotent operations (such as
4269 * getattr), it's not necessarily a problem if that estimate is wrong,
4270 * as we can fail it after processing without significant side effects.
4271 */
4272 __be32 nfsd4_check_resp_size(struct nfsd4_compoundres *resp, u32 respsize)
4273 {
4274 struct xdr_buf *buf = &resp->rqstp->rq_res;
4275 struct nfsd4_slot *slot = resp->cstate.slot;
4276
4277 if (buf->len + respsize <= buf->buflen)
4278 return nfs_ok;
4279 if (!nfsd4_has_session(&resp->cstate))
4280 return nfserr_resource;
4281 if (slot->sl_flags & NFSD4_SLOT_CACHETHIS) {
4282 WARN_ON_ONCE(1);
4283 return nfserr_rep_too_big_to_cache;
4284 }
4285 return nfserr_rep_too_big;
4286 }
4287
4288 void
4289 nfsd4_encode_operation(struct nfsd4_compoundres *resp, struct nfsd4_op *op)
4290 {
4291 struct xdr_stream *xdr = &resp->xdr;
4292 struct nfs4_stateowner *so = resp->cstate.replay_owner;
4293 struct svc_rqst *rqstp = resp->rqstp;
4294 int post_err_offset;
4295 nfsd4_enc encoder;
4296 __be32 *p;
4297
4298 p = xdr_reserve_space(xdr, 8);
4299 if (!p) {
4300 WARN_ON_ONCE(1);
4301 return;
4302 }
4303 *p++ = cpu_to_be32(op->opnum);
4304 post_err_offset = xdr->buf->len;
4305
4306 if (op->opnum == OP_ILLEGAL)
4307 goto status;
4308 BUG_ON(op->opnum < 0 || op->opnum >= ARRAY_SIZE(nfsd4_enc_ops) ||
4309 !nfsd4_enc_ops[op->opnum]);
4310 encoder = nfsd4_enc_ops[op->opnum];
4311 op->status = encoder(resp, op->status, &op->u);
4312 xdr_commit_encode(xdr);
4313
4314 /* nfsd4_check_resp_size guarantees enough room for error status */
4315 if (!op->status) {
4316 int space_needed = 0;
4317 if (!nfsd4_last_compound_op(rqstp))
4318 space_needed = COMPOUND_ERR_SLACK_SPACE;
4319 op->status = nfsd4_check_resp_size(resp, space_needed);
4320 }
4321 if (op->status == nfserr_resource && nfsd4_has_session(&resp->cstate)) {
4322 struct nfsd4_slot *slot = resp->cstate.slot;
4323
4324 if (slot->sl_flags & NFSD4_SLOT_CACHETHIS)
4325 op->status = nfserr_rep_too_big_to_cache;
4326 else
4327 op->status = nfserr_rep_too_big;
4328 }
4329 if (op->status == nfserr_resource ||
4330 op->status == nfserr_rep_too_big ||
4331 op->status == nfserr_rep_too_big_to_cache) {
4332 /*
4333 * The operation may have already been encoded or
4334 * partially encoded. No op returns anything additional
4335 * in the case of one of these three errors, so we can
4336 * just truncate back to after the status. But it's a
4337 * bug if we had to do this on a non-idempotent op:
4338 */
4339 warn_on_nonidempotent_op(op);
4340 xdr_truncate_encode(xdr, post_err_offset);
4341 }
4342 if (so) {
4343 int len = xdr->buf->len - post_err_offset;
4344
4345 so->so_replay.rp_status = op->status;
4346 so->so_replay.rp_buflen = len;
4347 read_bytes_from_xdr_buf(xdr->buf, post_err_offset,
4348 so->so_replay.rp_buf, len);
4349 }
4350 status:
4351 /* Note that op->status is already in network byte order: */
4352 write_bytes_to_xdr_buf(xdr->buf, post_err_offset - 4, &op->status, 4);
4353 }
4354
4355 /*
4356 * Encode the reply stored in the stateowner reply cache
4357 *
4358 * XDR note: do not encode rp->rp_buflen: the buffer contains the
4359 * previously sent already encoded operation.
4360 */
4361 void
4362 nfsd4_encode_replay(struct xdr_stream *xdr, struct nfsd4_op *op)
4363 {
4364 __be32 *p;
4365 struct nfs4_replay *rp = op->replay;
4366
4367 BUG_ON(!rp);
4368
4369 p = xdr_reserve_space(xdr, 8 + rp->rp_buflen);
4370 if (!p) {
4371 WARN_ON_ONCE(1);
4372 return;
4373 }
4374 *p++ = cpu_to_be32(op->opnum);
4375 *p++ = rp->rp_status; /* already xdr'ed */
4376
4377 p = xdr_encode_opaque_fixed(p, rp->rp_buf, rp->rp_buflen);
4378 }
4379
4380 int
4381 nfs4svc_encode_voidres(struct svc_rqst *rqstp, __be32 *p, void *dummy)
4382 {
4383 return xdr_ressize_check(rqstp, p);
4384 }
4385
4386 int nfsd4_release_compoundargs(void *rq, __be32 *p, void *resp)
4387 {
4388 struct svc_rqst *rqstp = rq;
4389 struct nfsd4_compoundargs *args = rqstp->rq_argp;
4390
4391 if (args->ops != args->iops) {
4392 kfree(args->ops);
4393 args->ops = args->iops;
4394 }
4395 kfree(args->tmpp);
4396 args->tmpp = NULL;
4397 while (args->to_free) {
4398 struct svcxdr_tmpbuf *tb = args->to_free;
4399 args->to_free = tb->next;
4400 kfree(tb);
4401 }
4402 return 1;
4403 }
4404
4405 int
4406 nfs4svc_decode_compoundargs(struct svc_rqst *rqstp, __be32 *p, struct nfsd4_compoundargs *args)
4407 {
4408 if (rqstp->rq_arg.head[0].iov_len % 4) {
4409 /* client is nuts */
4410 dprintk("%s: compound not properly padded! (peeraddr=%pISc xid=0x%x)",
4411 __func__, svc_addr(rqstp), be32_to_cpu(rqstp->rq_xid));
4412 return 0;
4413 }
4414 args->p = p;
4415 args->end = rqstp->rq_arg.head[0].iov_base + rqstp->rq_arg.head[0].iov_len;
4416 args->pagelist = rqstp->rq_arg.pages;
4417 args->pagelen = rqstp->rq_arg.page_len;
4418 args->tmpp = NULL;
4419 args->to_free = NULL;
4420 args->ops = args->iops;
4421 args->rqstp = rqstp;
4422
4423 return !nfsd4_decode_compound(args);
4424 }
4425
4426 int
4427 nfs4svc_encode_compoundres(struct svc_rqst *rqstp, __be32 *p, struct nfsd4_compoundres *resp)
4428 {
4429 /*
4430 * All that remains is to write the tag and operation count...
4431 */
4432 struct xdr_buf *buf = resp->xdr.buf;
4433
4434 WARN_ON_ONCE(buf->len != buf->head[0].iov_len + buf->page_len +
4435 buf->tail[0].iov_len);
4436
4437 rqstp->rq_next_page = resp->xdr.page_ptr + 1;
4438
4439 p = resp->tagp;
4440 *p++ = htonl(resp->taglen);
4441 memcpy(p, resp->tag, resp->taglen);
4442 p += XDR_QUADLEN(resp->taglen);
4443 *p++ = htonl(resp->opcnt);
4444
4445 nfsd4_sequence_done(resp);
4446 return 1;
4447 }
4448
4449 /*
4450 * Local variables:
4451 * c-basic-offset: 8
4452 * End:
4453 */
Linux kernel - Deliverables
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