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Linux 4.18.10
[linux/fpc-iii.git] / fs / nfsd / nfs4xdr.c
bloba96843c59fc146f1abb8c3a623984f29a083fefb
1 /*
2 * Server-side XDR for NFSv4
3 *
4 * Copyright (c) 2002 The Regents of the University of Michigan.
5 * All rights reserved.
6 *
7 * Kendrick Smith <kmsmith@umich.edu>
8 * Andy Adamson <andros@umich.edu>
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 *
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in the
18 * documentation and/or other materials provided with the distribution.
19 * 3. Neither the name of the University nor the names of its
20 * contributors may be used to endorse or promote products derived
21 * from this software without specific prior written permission.
22 *
23 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
24 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
25 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
26 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
28 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
29 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
30 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
31 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
32 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
33 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
34 */
35
36 #include <linux/file.h>
37 #include <linux/slab.h>
38 #include <linux/namei.h>
39 #include <linux/statfs.h>
40 #include <linux/utsname.h>
41 #include <linux/pagemap.h>
42 #include <linux/sunrpc/svcauth_gss.h>
43
44 #include "idmap.h"
45 #include "acl.h"
46 #include "xdr4.h"
47 #include "vfs.h"
48 #include "state.h"
49 #include "cache.h"
50 #include "netns.h"
51 #include "pnfs.h"
52
53 #ifdef CONFIG_NFSD_V4_SECURITY_LABEL
54 #include <linux/security.h>
55 #endif
56
57
58 #define NFSDDBG_FACILITY NFSDDBG_XDR
59
60 const u32 nfsd_suppattrs[3][3] = {
61 {NFSD4_SUPPORTED_ATTRS_WORD0,
62 NFSD4_SUPPORTED_ATTRS_WORD1,
63 NFSD4_SUPPORTED_ATTRS_WORD2},
64
65 {NFSD4_1_SUPPORTED_ATTRS_WORD0,
66 NFSD4_1_SUPPORTED_ATTRS_WORD1,
67 NFSD4_1_SUPPORTED_ATTRS_WORD2},
68
69 {NFSD4_1_SUPPORTED_ATTRS_WORD0,
70 NFSD4_1_SUPPORTED_ATTRS_WORD1,
71 NFSD4_2_SUPPORTED_ATTRS_WORD2},
72 };
73
74 /*
75 * As per referral draft, the fsid for a referral MUST be different from the fsid of the containing
76 * directory in order to indicate to the client that a filesystem boundary is present
77 * We use a fixed fsid for a referral
78 */
79 #define NFS4_REFERRAL_FSID_MAJOR 0x8000000ULL
80 #define NFS4_REFERRAL_FSID_MINOR 0x8000000ULL
81
82 static __be32
83 check_filename(char *str, int len)
84 {
85 int i;
86
87 if (len == 0)
88 return nfserr_inval;
89 if (isdotent(str, len))
90 return nfserr_badname;
91 for (i = 0; i < len; i++)
92 if (str[i] == '/')
93 return nfserr_badname;
94 return 0;
95 }
96
97 #define DECODE_HEAD \
98 __be32 *p; \
99 __be32 status
100 #define DECODE_TAIL \
101 status = 0; \
102 out: \
103 return status; \
104 xdr_error: \
105 dprintk("NFSD: xdr error (%s:%d)\n", \
106 __FILE__, __LINE__); \
107 status = nfserr_bad_xdr; \
108 goto out
109
110 #define READMEM(x,nbytes) do { \
111 x = (char *)p; \
112 p += XDR_QUADLEN(nbytes); \
113 } while (0)
114 #define SAVEMEM(x,nbytes) do { \
115 if (!(x = (p==argp->tmp || p == argp->tmpp) ? \
116 savemem(argp, p, nbytes) : \
117 (char *)p)) { \
118 dprintk("NFSD: xdr error (%s:%d)\n", \
119 __FILE__, __LINE__); \
120 goto xdr_error; \
121 } \
122 p += XDR_QUADLEN(nbytes); \
123 } while (0)
124 #define COPYMEM(x,nbytes) do { \
125 memcpy((x), p, nbytes); \
126 p += XDR_QUADLEN(nbytes); \
127 } while (0)
128
129 /* READ_BUF, read_buf(): nbytes must be <= PAGE_SIZE */
130 #define READ_BUF(nbytes) do { \
131 if (nbytes <= (u32)((char *)argp->end - (char *)argp->p)) { \
132 p = argp->p; \
133 argp->p += XDR_QUADLEN(nbytes); \
134 } else if (!(p = read_buf(argp, nbytes))) { \
135 dprintk("NFSD: xdr error (%s:%d)\n", \
136 __FILE__, __LINE__); \
137 goto xdr_error; \
138 } \
139 } while (0)
140
141 static void next_decode_page(struct nfsd4_compoundargs *argp)
142 {
143 argp->p = page_address(argp->pagelist[0]);
144 argp->pagelist++;
145 if (argp->pagelen < PAGE_SIZE) {
146 argp->end = argp->p + XDR_QUADLEN(argp->pagelen);
147 argp->pagelen = 0;
148 } else {
149 argp->end = argp->p + (PAGE_SIZE>>2);
150 argp->pagelen -= PAGE_SIZE;
151 }
152 }
153
154 static __be32 *read_buf(struct nfsd4_compoundargs *argp, u32 nbytes)
155 {
156 /* We want more bytes than seem to be available.
157 * Maybe we need a new page, maybe we have just run out
158 */
159 unsigned int avail = (char *)argp->end - (char *)argp->p;
160 __be32 *p;
161
162 if (argp->pagelen == 0) {
163 struct kvec *vec = &argp->rqstp->rq_arg.tail[0];
164
165 if (!argp->tail) {
166 argp->tail = true;
167 avail = vec->iov_len;
168 argp->p = vec->iov_base;
169 argp->end = vec->iov_base + avail;
170 }
171
172 if (avail < nbytes)
173 return NULL;
174
175 p = argp->p;
176 argp->p += XDR_QUADLEN(nbytes);
177 return p;
178 }
179
180 if (avail + argp->pagelen < nbytes)
181 return NULL;
182 if (avail + PAGE_SIZE < nbytes) /* need more than a page !! */
183 return NULL;
184 /* ok, we can do it with the current plus the next page */
185 if (nbytes <= sizeof(argp->tmp))
186 p = argp->tmp;
187 else {
188 kfree(argp->tmpp);
189 p = argp->tmpp = kmalloc(nbytes, GFP_KERNEL);
190 if (!p)
191 return NULL;
192
193 }
194 /*
195 * The following memcpy is safe because read_buf is always
196 * called with nbytes > avail, and the two cases above both
197 * guarantee p points to at least nbytes bytes.
198 */
199 memcpy(p, argp->p, avail);
200 next_decode_page(argp);
201 memcpy(((char*)p)+avail, argp->p, (nbytes - avail));
202 argp->p += XDR_QUADLEN(nbytes - avail);
203 return p;
204 }
205
206 static int zero_clientid(clientid_t *clid)
207 {
208 return (clid->cl_boot == 0) && (clid->cl_id == 0);
209 }
210
211 /**
212 * svcxdr_tmpalloc - allocate memory to be freed after compound processing
213 * @argp: NFSv4 compound argument structure
214 * @p: pointer to be freed (with kfree())
215 *
216 * Marks @p to be freed when processing the compound operation
217 * described in @argp finishes.
218 */
219 static void *
220 svcxdr_tmpalloc(struct nfsd4_compoundargs *argp, u32 len)
221 {
222 struct svcxdr_tmpbuf *tb;
223
224 tb = kmalloc(sizeof(*tb) + len, GFP_KERNEL);
225 if (!tb)
226 return NULL;
227 tb->next = argp->to_free;
228 argp->to_free = tb;
229 return tb->buf;
230 }
231
232 /*
233 * For xdr strings that need to be passed to other kernel api's
234 * as null-terminated strings.
235 *
236 * Note null-terminating in place usually isn't safe since the
237 * buffer might end on a page boundary.
238 */
239 static char *
240 svcxdr_dupstr(struct nfsd4_compoundargs *argp, void *buf, u32 len)
241 {
242 char *p = svcxdr_tmpalloc(argp, len + 1);
243
244 if (!p)
245 return NULL;
246 memcpy(p, buf, len);
247 p[len] = '\0';
248 return p;
249 }
250
251 /**
252 * savemem - duplicate a chunk of memory for later processing
253 * @argp: NFSv4 compound argument structure to be freed with
254 * @p: pointer to be duplicated
255 * @nbytes: length to be duplicated
256 *
257 * Returns a pointer to a copy of @nbytes bytes of memory at @p
258 * that are preserved until processing of the NFSv4 compound
259 * operation described by @argp finishes.
260 */
261 static char *savemem(struct nfsd4_compoundargs *argp, __be32 *p, int nbytes)
262 {
263 void *ret;
264
265 ret = svcxdr_tmpalloc(argp, nbytes);
266 if (!ret)
267 return NULL;
268 memcpy(ret, p, nbytes);
269 return ret;
270 }
271
272 /*
273 * We require the high 32 bits of 'seconds' to be 0, and
274 * we ignore all 32 bits of 'nseconds'.
275 */
276 static __be32
277 nfsd4_decode_time(struct nfsd4_compoundargs *argp, struct timespec *tv)
278 {
279 DECODE_HEAD;
280 u64 sec;
281
282 READ_BUF(12);
283 p = xdr_decode_hyper(p, &sec);
284 tv->tv_sec = sec;
285 tv->tv_nsec = be32_to_cpup(p++);
286 if (tv->tv_nsec >= (u32)1000000000)
287 return nfserr_inval;
288
289 DECODE_TAIL;
290 }
291
292 static __be32
293 nfsd4_decode_bitmap(struct nfsd4_compoundargs *argp, u32 *bmval)
294 {
295 u32 bmlen;
296 DECODE_HEAD;
297
298 bmval[0] = 0;
299 bmval[1] = 0;
300 bmval[2] = 0;
301
302 READ_BUF(4);
303 bmlen = be32_to_cpup(p++);
304 if (bmlen > 1000)
305 goto xdr_error;
306
307 READ_BUF(bmlen << 2);
308 if (bmlen > 0)
309 bmval[0] = be32_to_cpup(p++);
310 if (bmlen > 1)
311 bmval[1] = be32_to_cpup(p++);
312 if (bmlen > 2)
313 bmval[2] = be32_to_cpup(p++);
314
315 DECODE_TAIL;
316 }
317
318 static __be32
319 nfsd4_decode_fattr(struct nfsd4_compoundargs *argp, u32 *bmval,
320 struct iattr *iattr, struct nfs4_acl **acl,
321 struct xdr_netobj *label, int *umask)
322 {
323 struct timespec ts;
324 int expected_len, len = 0;
325 u32 dummy32;
326 char *buf;
327
328 DECODE_HEAD;
329 iattr->ia_valid = 0;
330 if ((status = nfsd4_decode_bitmap(argp, bmval)))
331 return status;
332
333 if (bmval[0] & ~NFSD_WRITEABLE_ATTRS_WORD0
334 || bmval[1] & ~NFSD_WRITEABLE_ATTRS_WORD1
335 || bmval[2] & ~NFSD_WRITEABLE_ATTRS_WORD2) {
336 if (nfsd_attrs_supported(argp->minorversion, bmval))
337 return nfserr_inval;
338 return nfserr_attrnotsupp;
339 }
340
341 READ_BUF(4);
342 expected_len = be32_to_cpup(p++);
343
344 if (bmval[0] & FATTR4_WORD0_SIZE) {
345 READ_BUF(8);
346 len += 8;
347 p = xdr_decode_hyper(p, &iattr->ia_size);
348 iattr->ia_valid |= ATTR_SIZE;
349 }
350 if (bmval[0] & FATTR4_WORD0_ACL) {
351 u32 nace;
352 struct nfs4_ace *ace;
353
354 READ_BUF(4); len += 4;
355 nace = be32_to_cpup(p++);
356
357 if (nace > NFS4_ACL_MAX)
358 return nfserr_fbig;
359
360 *acl = svcxdr_tmpalloc(argp, nfs4_acl_bytes(nace));
361 if (*acl == NULL)
362 return nfserr_jukebox;
363
364 (*acl)->naces = nace;
365 for (ace = (*acl)->aces; ace < (*acl)->aces + nace; ace++) {
366 READ_BUF(16); len += 16;
367 ace->type = be32_to_cpup(p++);
368 ace->flag = be32_to_cpup(p++);
369 ace->access_mask = be32_to_cpup(p++);
370 dummy32 = be32_to_cpup(p++);
371 READ_BUF(dummy32);
372 len += XDR_QUADLEN(dummy32) << 2;
373 READMEM(buf, dummy32);
374 ace->whotype = nfs4_acl_get_whotype(buf, dummy32);
375 status = nfs_ok;
376 if (ace->whotype != NFS4_ACL_WHO_NAMED)
377 ;
378 else if (ace->flag & NFS4_ACE_IDENTIFIER_GROUP)
379 status = nfsd_map_name_to_gid(argp->rqstp,
380 buf, dummy32, &ace->who_gid);
381 else
382 status = nfsd_map_name_to_uid(argp->rqstp,
383 buf, dummy32, &ace->who_uid);
384 if (status)
385 return status;
386 }
387 } else
388 *acl = NULL;
389 if (bmval[1] & FATTR4_WORD1_MODE) {
390 READ_BUF(4);
391 len += 4;
392 iattr->ia_mode = be32_to_cpup(p++);
393 iattr->ia_mode &= (S_IFMT | S_IALLUGO);
394 iattr->ia_valid |= ATTR_MODE;
395 }
396 if (bmval[1] & FATTR4_WORD1_OWNER) {
397 READ_BUF(4);
398 len += 4;
399 dummy32 = be32_to_cpup(p++);
400 READ_BUF(dummy32);
401 len += (XDR_QUADLEN(dummy32) << 2);
402 READMEM(buf, dummy32);
403 if ((status = nfsd_map_name_to_uid(argp->rqstp, buf, dummy32, &iattr->ia_uid)))
404 return status;
405 iattr->ia_valid |= ATTR_UID;
406 }
407 if (bmval[1] & FATTR4_WORD1_OWNER_GROUP) {
408 READ_BUF(4);
409 len += 4;
410 dummy32 = be32_to_cpup(p++);
411 READ_BUF(dummy32);
412 len += (XDR_QUADLEN(dummy32) << 2);
413 READMEM(buf, dummy32);
414 if ((status = nfsd_map_name_to_gid(argp->rqstp, buf, dummy32, &iattr->ia_gid)))
415 return status;
416 iattr->ia_valid |= ATTR_GID;
417 }
418 if (bmval[1] & FATTR4_WORD1_TIME_ACCESS_SET) {
419 READ_BUF(4);
420 len += 4;
421 dummy32 = be32_to_cpup(p++);
422 switch (dummy32) {
423 case NFS4_SET_TO_CLIENT_TIME:
424 len += 12;
425 status = nfsd4_decode_time(argp, &ts);
426 iattr->ia_atime = timespec_to_timespec64(ts);
427 if (status)
428 return status;
429 iattr->ia_valid |= (ATTR_ATIME | ATTR_ATIME_SET);
430 break;
431 case NFS4_SET_TO_SERVER_TIME:
432 iattr->ia_valid |= ATTR_ATIME;
433 break;
434 default:
435 goto xdr_error;
436 }
437 }
438 if (bmval[1] & FATTR4_WORD1_TIME_MODIFY_SET) {
439 READ_BUF(4);
440 len += 4;
441 dummy32 = be32_to_cpup(p++);
442 switch (dummy32) {
443 case NFS4_SET_TO_CLIENT_TIME:
444 len += 12;
445 status = nfsd4_decode_time(argp, &ts);
446 iattr->ia_mtime = timespec_to_timespec64(ts);
447 if (status)
448 return status;
449 iattr->ia_valid |= (ATTR_MTIME | ATTR_MTIME_SET);
450 break;
451 case NFS4_SET_TO_SERVER_TIME:
452 iattr->ia_valid |= ATTR_MTIME;
453 break;
454 default:
455 goto xdr_error;
456 }
457 }
458
459 label->len = 0;
460 if (IS_ENABLED(CONFIG_NFSD_V4_SECURITY_LABEL) &&
461 bmval[2] & FATTR4_WORD2_SECURITY_LABEL) {
462 READ_BUF(4);
463 len += 4;
464 dummy32 = be32_to_cpup(p++); /* lfs: we don't use it */
465 READ_BUF(4);
466 len += 4;
467 dummy32 = be32_to_cpup(p++); /* pi: we don't use it either */
468 READ_BUF(4);
469 len += 4;
470 dummy32 = be32_to_cpup(p++);
471 READ_BUF(dummy32);
472 if (dummy32 > NFS4_MAXLABELLEN)
473 return nfserr_badlabel;
474 len += (XDR_QUADLEN(dummy32) << 2);
475 READMEM(buf, dummy32);
476 label->len = dummy32;
477 label->data = svcxdr_dupstr(argp, buf, dummy32);
478 if (!label->data)
479 return nfserr_jukebox;
480 }
481 if (bmval[2] & FATTR4_WORD2_MODE_UMASK) {
482 if (!umask)
483 goto xdr_error;
484 READ_BUF(8);
485 len += 8;
486 dummy32 = be32_to_cpup(p++);
487 iattr->ia_mode = dummy32 & (S_IFMT | S_IALLUGO);
488 dummy32 = be32_to_cpup(p++);
489 *umask = dummy32 & S_IRWXUGO;
490 iattr->ia_valid |= ATTR_MODE;
491 }
492 if (len != expected_len)
493 goto xdr_error;
494
495 DECODE_TAIL;
496 }
497
498 static __be32
499 nfsd4_decode_stateid(struct nfsd4_compoundargs *argp, stateid_t *sid)
500 {
501 DECODE_HEAD;
502
503 READ_BUF(sizeof(stateid_t));
504 sid->si_generation = be32_to_cpup(p++);
505 COPYMEM(&sid->si_opaque, sizeof(stateid_opaque_t));
506
507 DECODE_TAIL;
508 }
509
510 static __be32
511 nfsd4_decode_access(struct nfsd4_compoundargs *argp, struct nfsd4_access *access)
512 {
513 DECODE_HEAD;
514
515 READ_BUF(4);
516 access->ac_req_access = be32_to_cpup(p++);
517
518 DECODE_TAIL;
519 }
520
521 static __be32 nfsd4_decode_cb_sec(struct nfsd4_compoundargs *argp, struct nfsd4_cb_sec *cbs)
522 {
523 DECODE_HEAD;
524 u32 dummy, uid, gid;
525 char *machine_name;
526 int i;
527 int nr_secflavs;
528
529 /* callback_sec_params4 */
530 READ_BUF(4);
531 nr_secflavs = be32_to_cpup(p++);
532 if (nr_secflavs)
533 cbs->flavor = (u32)(-1);
534 else
535 /* Is this legal? Be generous, take it to mean AUTH_NONE: */
536 cbs->flavor = 0;
537 for (i = 0; i < nr_secflavs; ++i) {
538 READ_BUF(4);
539 dummy = be32_to_cpup(p++);
540 switch (dummy) {
541 case RPC_AUTH_NULL:
542 /* Nothing to read */
543 if (cbs->flavor == (u32)(-1))
544 cbs->flavor = RPC_AUTH_NULL;
545 break;
546 case RPC_AUTH_UNIX:
547 READ_BUF(8);
548 /* stamp */
549 dummy = be32_to_cpup(p++);
550
551 /* machine name */
552 dummy = be32_to_cpup(p++);
553 READ_BUF(dummy);
554 SAVEMEM(machine_name, dummy);
555
556 /* uid, gid */
557 READ_BUF(8);
558 uid = be32_to_cpup(p++);
559 gid = be32_to_cpup(p++);
560
561 /* more gids */
562 READ_BUF(4);
563 dummy = be32_to_cpup(p++);
564 READ_BUF(dummy * 4);
565 if (cbs->flavor == (u32)(-1)) {
566 kuid_t kuid = make_kuid(&init_user_ns, uid);
567 kgid_t kgid = make_kgid(&init_user_ns, gid);
568 if (uid_valid(kuid) && gid_valid(kgid)) {
569 cbs->uid = kuid;
570 cbs->gid = kgid;
571 cbs->flavor = RPC_AUTH_UNIX;
572 } else {
573 dprintk("RPC_AUTH_UNIX with invalid"
574 "uid or gid ignoring!\n");
575 }
576 }
577 break;
578 case RPC_AUTH_GSS:
579 dprintk("RPC_AUTH_GSS callback secflavor "
580 "not supported!\n");
581 READ_BUF(8);
582 /* gcbp_service */
583 dummy = be32_to_cpup(p++);
584 /* gcbp_handle_from_server */
585 dummy = be32_to_cpup(p++);
586 READ_BUF(dummy);
587 p += XDR_QUADLEN(dummy);
588 /* gcbp_handle_from_client */
589 READ_BUF(4);
590 dummy = be32_to_cpup(p++);
591 READ_BUF(dummy);
592 break;
593 default:
594 dprintk("Illegal callback secflavor\n");
595 return nfserr_inval;
596 }
597 }
598 DECODE_TAIL;
599 }
600
601 static __be32 nfsd4_decode_backchannel_ctl(struct nfsd4_compoundargs *argp, struct nfsd4_backchannel_ctl *bc)
602 {
603 DECODE_HEAD;
604
605 READ_BUF(4);
606 bc->bc_cb_program = be32_to_cpup(p++);
607 nfsd4_decode_cb_sec(argp, &bc->bc_cb_sec);
608
609 DECODE_TAIL;
610 }
611
612 static __be32 nfsd4_decode_bind_conn_to_session(struct nfsd4_compoundargs *argp, struct nfsd4_bind_conn_to_session *bcts)
613 {
614 DECODE_HEAD;
615
616 READ_BUF(NFS4_MAX_SESSIONID_LEN + 8);
617 COPYMEM(bcts->sessionid.data, NFS4_MAX_SESSIONID_LEN);
618 bcts->dir = be32_to_cpup(p++);
619 /* XXX: skipping ctsa_use_conn_in_rdma_mode. Perhaps Tom Tucker
620 * could help us figure out we should be using it. */
621 DECODE_TAIL;
622 }
623
624 static __be32
625 nfsd4_decode_close(struct nfsd4_compoundargs *argp, struct nfsd4_close *close)
626 {
627 DECODE_HEAD;
628
629 READ_BUF(4);
630 close->cl_seqid = be32_to_cpup(p++);
631 return nfsd4_decode_stateid(argp, &close->cl_stateid);
632
633 DECODE_TAIL;
634 }
635
636
637 static __be32
638 nfsd4_decode_commit(struct nfsd4_compoundargs *argp, struct nfsd4_commit *commit)
639 {
640 DECODE_HEAD;
641
642 READ_BUF(12);
643 p = xdr_decode_hyper(p, &commit->co_offset);
644 commit->co_count = be32_to_cpup(p++);
645
646 DECODE_TAIL;
647 }
648
649 static __be32
650 nfsd4_decode_create(struct nfsd4_compoundargs *argp, struct nfsd4_create *create)
651 {
652 DECODE_HEAD;
653
654 READ_BUF(4);
655 create->cr_type = be32_to_cpup(p++);
656 switch (create->cr_type) {
657 case NF4LNK:
658 READ_BUF(4);
659 create->cr_datalen = be32_to_cpup(p++);
660 READ_BUF(create->cr_datalen);
661 create->cr_data = svcxdr_dupstr(argp, p, create->cr_datalen);
662 if (!create->cr_data)
663 return nfserr_jukebox;
664 break;
665 case NF4BLK:
666 case NF4CHR:
667 READ_BUF(8);
668 create->cr_specdata1 = be32_to_cpup(p++);
669 create->cr_specdata2 = be32_to_cpup(p++);
670 break;
671 case NF4SOCK:
672 case NF4FIFO:
673 case NF4DIR:
674 default:
675 break;
676 }
677
678 READ_BUF(4);
679 create->cr_namelen = be32_to_cpup(p++);
680 READ_BUF(create->cr_namelen);
681 SAVEMEM(create->cr_name, create->cr_namelen);
682 if ((status = check_filename(create->cr_name, create->cr_namelen)))
683 return status;
684
685 status = nfsd4_decode_fattr(argp, create->cr_bmval, &create->cr_iattr,
686 &create->cr_acl, &create->cr_label,
687 &create->cr_umask);
688 if (status)
689 goto out;
690
691 DECODE_TAIL;
692 }
693
694 static inline __be32
695 nfsd4_decode_delegreturn(struct nfsd4_compoundargs *argp, struct nfsd4_delegreturn *dr)
696 {
697 return nfsd4_decode_stateid(argp, &dr->dr_stateid);
698 }
699
700 static inline __be32
701 nfsd4_decode_getattr(struct nfsd4_compoundargs *argp, struct nfsd4_getattr *getattr)
702 {
703 return nfsd4_decode_bitmap(argp, getattr->ga_bmval);
704 }
705
706 static __be32
707 nfsd4_decode_link(struct nfsd4_compoundargs *argp, struct nfsd4_link *link)
708 {
709 DECODE_HEAD;
710
711 READ_BUF(4);
712 link->li_namelen = be32_to_cpup(p++);
713 READ_BUF(link->li_namelen);
714 SAVEMEM(link->li_name, link->li_namelen);
715 if ((status = check_filename(link->li_name, link->li_namelen)))
716 return status;
717
718 DECODE_TAIL;
719 }
720
721 static __be32
722 nfsd4_decode_lock(struct nfsd4_compoundargs *argp, struct nfsd4_lock *lock)
723 {
724 DECODE_HEAD;
725
726 /*
727 * type, reclaim(boolean), offset, length, new_lock_owner(boolean)
728 */
729 READ_BUF(28);
730 lock->lk_type = be32_to_cpup(p++);
731 if ((lock->lk_type < NFS4_READ_LT) || (lock->lk_type > NFS4_WRITEW_LT))
732 goto xdr_error;
733 lock->lk_reclaim = be32_to_cpup(p++);
734 p = xdr_decode_hyper(p, &lock->lk_offset);
735 p = xdr_decode_hyper(p, &lock->lk_length);
736 lock->lk_is_new = be32_to_cpup(p++);
737
738 if (lock->lk_is_new) {
739 READ_BUF(4);
740 lock->lk_new_open_seqid = be32_to_cpup(p++);
741 status = nfsd4_decode_stateid(argp, &lock->lk_new_open_stateid);
742 if (status)
743 return status;
744 READ_BUF(8 + sizeof(clientid_t));
745 lock->lk_new_lock_seqid = be32_to_cpup(p++);
746 COPYMEM(&lock->lk_new_clientid, sizeof(clientid_t));
747 lock->lk_new_owner.len = be32_to_cpup(p++);
748 READ_BUF(lock->lk_new_owner.len);
749 READMEM(lock->lk_new_owner.data, lock->lk_new_owner.len);
750 } else {
751 status = nfsd4_decode_stateid(argp, &lock->lk_old_lock_stateid);
752 if (status)
753 return status;
754 READ_BUF(4);
755 lock->lk_old_lock_seqid = be32_to_cpup(p++);
756 }
757
758 DECODE_TAIL;
759 }
760
761 static __be32
762 nfsd4_decode_lockt(struct nfsd4_compoundargs *argp, struct nfsd4_lockt *lockt)
763 {
764 DECODE_HEAD;
765
766 READ_BUF(32);
767 lockt->lt_type = be32_to_cpup(p++);
768 if((lockt->lt_type < NFS4_READ_LT) || (lockt->lt_type > NFS4_WRITEW_LT))
769 goto xdr_error;
770 p = xdr_decode_hyper(p, &lockt->lt_offset);
771 p = xdr_decode_hyper(p, &lockt->lt_length);
772 COPYMEM(&lockt->lt_clientid, 8);
773 lockt->lt_owner.len = be32_to_cpup(p++);
774 READ_BUF(lockt->lt_owner.len);
775 READMEM(lockt->lt_owner.data, lockt->lt_owner.len);
776
777 DECODE_TAIL;
778 }
779
780 static __be32
781 nfsd4_decode_locku(struct nfsd4_compoundargs *argp, struct nfsd4_locku *locku)
782 {
783 DECODE_HEAD;
784
785 READ_BUF(8);
786 locku->lu_type = be32_to_cpup(p++);
787 if ((locku->lu_type < NFS4_READ_LT) || (locku->lu_type > NFS4_WRITEW_LT))
788 goto xdr_error;
789 locku->lu_seqid = be32_to_cpup(p++);
790 status = nfsd4_decode_stateid(argp, &locku->lu_stateid);
791 if (status)
792 return status;
793 READ_BUF(16);
794 p = xdr_decode_hyper(p, &locku->lu_offset);
795 p = xdr_decode_hyper(p, &locku->lu_length);
796
797 DECODE_TAIL;
798 }
799
800 static __be32
801 nfsd4_decode_lookup(struct nfsd4_compoundargs *argp, struct nfsd4_lookup *lookup)
802 {
803 DECODE_HEAD;
804
805 READ_BUF(4);
806 lookup->lo_len = be32_to_cpup(p++);
807 READ_BUF(lookup->lo_len);
808 SAVEMEM(lookup->lo_name, lookup->lo_len);
809 if ((status = check_filename(lookup->lo_name, lookup->lo_len)))
810 return status;
811
812 DECODE_TAIL;
813 }
814
815 static __be32 nfsd4_decode_share_access(struct nfsd4_compoundargs *argp, u32 *share_access, u32 *deleg_want, u32 *deleg_when)
816 {
817 __be32 *p;
818 u32 w;
819
820 READ_BUF(4);
821 w = be32_to_cpup(p++);
822 *share_access = w & NFS4_SHARE_ACCESS_MASK;
823 *deleg_want = w & NFS4_SHARE_WANT_MASK;
824 if (deleg_when)
825 *deleg_when = w & NFS4_SHARE_WHEN_MASK;
826
827 switch (w & NFS4_SHARE_ACCESS_MASK) {
828 case NFS4_SHARE_ACCESS_READ:
829 case NFS4_SHARE_ACCESS_WRITE:
830 case NFS4_SHARE_ACCESS_BOTH:
831 break;
832 default:
833 return nfserr_bad_xdr;
834 }
835 w &= ~NFS4_SHARE_ACCESS_MASK;
836 if (!w)
837 return nfs_ok;
838 if (!argp->minorversion)
839 return nfserr_bad_xdr;
840 switch (w & NFS4_SHARE_WANT_MASK) {
841 case NFS4_SHARE_WANT_NO_PREFERENCE:
842 case NFS4_SHARE_WANT_READ_DELEG:
843 case NFS4_SHARE_WANT_WRITE_DELEG:
844 case NFS4_SHARE_WANT_ANY_DELEG:
845 case NFS4_SHARE_WANT_NO_DELEG:
846 case NFS4_SHARE_WANT_CANCEL:
847 break;
848 default:
849 return nfserr_bad_xdr;
850 }
851 w &= ~NFS4_SHARE_WANT_MASK;
852 if (!w)
853 return nfs_ok;
854
855 if (!deleg_when) /* open_downgrade */
856 return nfserr_inval;
857 switch (w) {
858 case NFS4_SHARE_SIGNAL_DELEG_WHEN_RESRC_AVAIL:
859 case NFS4_SHARE_PUSH_DELEG_WHEN_UNCONTENDED:
860 case (NFS4_SHARE_SIGNAL_DELEG_WHEN_RESRC_AVAIL |
861 NFS4_SHARE_PUSH_DELEG_WHEN_UNCONTENDED):
862 return nfs_ok;
863 }
864 xdr_error:
865 return nfserr_bad_xdr;
866 }
867
868 static __be32 nfsd4_decode_share_deny(struct nfsd4_compoundargs *argp, u32 *x)
869 {
870 __be32 *p;
871
872 READ_BUF(4);
873 *x = be32_to_cpup(p++);
874 /* Note: unlinke access bits, deny bits may be zero. */
875 if (*x & ~NFS4_SHARE_DENY_BOTH)
876 return nfserr_bad_xdr;
877 return nfs_ok;
878 xdr_error:
879 return nfserr_bad_xdr;
880 }
881
882 static __be32 nfsd4_decode_opaque(struct nfsd4_compoundargs *argp, struct xdr_netobj *o)
883 {
884 __be32 *p;
885
886 READ_BUF(4);
887 o->len = be32_to_cpup(p++);
888
889 if (o->len == 0 || o->len > NFS4_OPAQUE_LIMIT)
890 return nfserr_bad_xdr;
891
892 READ_BUF(o->len);
893 SAVEMEM(o->data, o->len);
894 return nfs_ok;
895 xdr_error:
896 return nfserr_bad_xdr;
897 }
898
899 static __be32
900 nfsd4_decode_open(struct nfsd4_compoundargs *argp, struct nfsd4_open *open)
901 {
902 DECODE_HEAD;
903 u32 dummy;
904
905 memset(open->op_bmval, 0, sizeof(open->op_bmval));
906 open->op_iattr.ia_valid = 0;
907 open->op_openowner = NULL;
908
909 open->op_xdr_error = 0;
910 /* seqid, share_access, share_deny, clientid, ownerlen */
911 READ_BUF(4);
912 open->op_seqid = be32_to_cpup(p++);
913 /* decode, yet ignore deleg_when until supported */
914 status = nfsd4_decode_share_access(argp, &open->op_share_access,
915 &open->op_deleg_want, &dummy);
916 if (status)
917 goto xdr_error;
918 status = nfsd4_decode_share_deny(argp, &open->op_share_deny);
919 if (status)
920 goto xdr_error;
921 READ_BUF(sizeof(clientid_t));
922 COPYMEM(&open->op_clientid, sizeof(clientid_t));
923 status = nfsd4_decode_opaque(argp, &open->op_owner);
924 if (status)
925 goto xdr_error;
926 READ_BUF(4);
927 open->op_create = be32_to_cpup(p++);
928 switch (open->op_create) {
929 case NFS4_OPEN_NOCREATE:
930 break;
931 case NFS4_OPEN_CREATE:
932 READ_BUF(4);
933 open->op_createmode = be32_to_cpup(p++);
934 switch (open->op_createmode) {
935 case NFS4_CREATE_UNCHECKED:
936 case NFS4_CREATE_GUARDED:
937 status = nfsd4_decode_fattr(argp, open->op_bmval,
938 &open->op_iattr, &open->op_acl, &open->op_label,
939 &open->op_umask);
940 if (status)
941 goto out;
942 break;
943 case NFS4_CREATE_EXCLUSIVE:
944 READ_BUF(NFS4_VERIFIER_SIZE);
945 COPYMEM(open->op_verf.data, NFS4_VERIFIER_SIZE);
946 break;
947 case NFS4_CREATE_EXCLUSIVE4_1:
948 if (argp->minorversion < 1)
949 goto xdr_error;
950 READ_BUF(NFS4_VERIFIER_SIZE);
951 COPYMEM(open->op_verf.data, NFS4_VERIFIER_SIZE);
952 status = nfsd4_decode_fattr(argp, open->op_bmval,
953 &open->op_iattr, &open->op_acl, &open->op_label,
954 &open->op_umask);
955 if (status)
956 goto out;
957 break;
958 default:
959 goto xdr_error;
960 }
961 break;
962 default:
963 goto xdr_error;
964 }
965
966 /* open_claim */
967 READ_BUF(4);
968 open->op_claim_type = be32_to_cpup(p++);
969 switch (open->op_claim_type) {
970 case NFS4_OPEN_CLAIM_NULL:
971 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
972 READ_BUF(4);
973 open->op_fname.len = be32_to_cpup(p++);
974 READ_BUF(open->op_fname.len);
975 SAVEMEM(open->op_fname.data, open->op_fname.len);
976 if ((status = check_filename(open->op_fname.data, open->op_fname.len)))
977 return status;
978 break;
979 case NFS4_OPEN_CLAIM_PREVIOUS:
980 READ_BUF(4);
981 open->op_delegate_type = be32_to_cpup(p++);
982 break;
983 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
984 status = nfsd4_decode_stateid(argp, &open->op_delegate_stateid);
985 if (status)
986 return status;
987 READ_BUF(4);
988 open->op_fname.len = be32_to_cpup(p++);
989 READ_BUF(open->op_fname.len);
990 SAVEMEM(open->op_fname.data, open->op_fname.len);
991 if ((status = check_filename(open->op_fname.data, open->op_fname.len)))
992 return status;
993 break;
994 case NFS4_OPEN_CLAIM_FH:
995 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
996 if (argp->minorversion < 1)
997 goto xdr_error;
998 /* void */
999 break;
1000 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1001 if (argp->minorversion < 1)
1002 goto xdr_error;
1003 status = nfsd4_decode_stateid(argp, &open->op_delegate_stateid);
1004 if (status)
1005 return status;
1006 break;
1007 default:
1008 goto xdr_error;
1009 }
1010
1011 DECODE_TAIL;
1012 }
1013
1014 static __be32
1015 nfsd4_decode_open_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_open_confirm *open_conf)
1016 {
1017 DECODE_HEAD;
1018
1019 if (argp->minorversion >= 1)
1020 return nfserr_notsupp;
1021
1022 status = nfsd4_decode_stateid(argp, &open_conf->oc_req_stateid);
1023 if (status)
1024 return status;
1025 READ_BUF(4);
1026 open_conf->oc_seqid = be32_to_cpup(p++);
1027
1028 DECODE_TAIL;
1029 }
1030
1031 static __be32
1032 nfsd4_decode_open_downgrade(struct nfsd4_compoundargs *argp, struct nfsd4_open_downgrade *open_down)
1033 {
1034 DECODE_HEAD;
1035
1036 status = nfsd4_decode_stateid(argp, &open_down->od_stateid);
1037 if (status)
1038 return status;
1039 READ_BUF(4);
1040 open_down->od_seqid = be32_to_cpup(p++);
1041 status = nfsd4_decode_share_access(argp, &open_down->od_share_access,
1042 &open_down->od_deleg_want, NULL);
1043 if (status)
1044 return status;
1045 status = nfsd4_decode_share_deny(argp, &open_down->od_share_deny);
1046 if (status)
1047 return status;
1048 DECODE_TAIL;
1049 }
1050
1051 static __be32
1052 nfsd4_decode_putfh(struct nfsd4_compoundargs *argp, struct nfsd4_putfh *putfh)
1053 {
1054 DECODE_HEAD;
1055
1056 READ_BUF(4);
1057 putfh->pf_fhlen = be32_to_cpup(p++);
1058 if (putfh->pf_fhlen > NFS4_FHSIZE)
1059 goto xdr_error;
1060 READ_BUF(putfh->pf_fhlen);
1061 SAVEMEM(putfh->pf_fhval, putfh->pf_fhlen);
1062
1063 DECODE_TAIL;
1064 }
1065
1066 static __be32
1067 nfsd4_decode_putpubfh(struct nfsd4_compoundargs *argp, void *p)
1068 {
1069 if (argp->minorversion == 0)
1070 return nfs_ok;
1071 return nfserr_notsupp;
1072 }
1073
1074 static __be32
1075 nfsd4_decode_read(struct nfsd4_compoundargs *argp, struct nfsd4_read *read)
1076 {
1077 DECODE_HEAD;
1078
1079 status = nfsd4_decode_stateid(argp, &read->rd_stateid);
1080 if (status)
1081 return status;
1082 READ_BUF(12);
1083 p = xdr_decode_hyper(p, &read->rd_offset);
1084 read->rd_length = be32_to_cpup(p++);
1085
1086 DECODE_TAIL;
1087 }
1088
1089 static __be32
1090 nfsd4_decode_readdir(struct nfsd4_compoundargs *argp, struct nfsd4_readdir *readdir)
1091 {
1092 DECODE_HEAD;
1093
1094 READ_BUF(24);
1095 p = xdr_decode_hyper(p, &readdir->rd_cookie);
1096 COPYMEM(readdir->rd_verf.data, sizeof(readdir->rd_verf.data));
1097 readdir->rd_dircount = be32_to_cpup(p++);
1098 readdir->rd_maxcount = be32_to_cpup(p++);
1099 if ((status = nfsd4_decode_bitmap(argp, readdir->rd_bmval)))
1100 goto out;
1101
1102 DECODE_TAIL;
1103 }
1104
1105 static __be32
1106 nfsd4_decode_remove(struct nfsd4_compoundargs *argp, struct nfsd4_remove *remove)
1107 {
1108 DECODE_HEAD;
1109
1110 READ_BUF(4);
1111 remove->rm_namelen = be32_to_cpup(p++);
1112 READ_BUF(remove->rm_namelen);
1113 SAVEMEM(remove->rm_name, remove->rm_namelen);
1114 if ((status = check_filename(remove->rm_name, remove->rm_namelen)))
1115 return status;
1116
1117 DECODE_TAIL;
1118 }
1119
1120 static __be32
1121 nfsd4_decode_rename(struct nfsd4_compoundargs *argp, struct nfsd4_rename *rename)
1122 {
1123 DECODE_HEAD;
1124
1125 READ_BUF(4);
1126 rename->rn_snamelen = be32_to_cpup(p++);
1127 READ_BUF(rename->rn_snamelen);
1128 SAVEMEM(rename->rn_sname, rename->rn_snamelen);
1129 READ_BUF(4);
1130 rename->rn_tnamelen = be32_to_cpup(p++);
1131 READ_BUF(rename->rn_tnamelen);
1132 SAVEMEM(rename->rn_tname, rename->rn_tnamelen);
1133 if ((status = check_filename(rename->rn_sname, rename->rn_snamelen)))
1134 return status;
1135 if ((status = check_filename(rename->rn_tname, rename->rn_tnamelen)))
1136 return status;
1137
1138 DECODE_TAIL;
1139 }
1140
1141 static __be32
1142 nfsd4_decode_renew(struct nfsd4_compoundargs *argp, clientid_t *clientid)
1143 {
1144 DECODE_HEAD;
1145
1146 if (argp->minorversion >= 1)
1147 return nfserr_notsupp;
1148
1149 READ_BUF(sizeof(clientid_t));
1150 COPYMEM(clientid, sizeof(clientid_t));
1151
1152 DECODE_TAIL;
1153 }
1154
1155 static __be32
1156 nfsd4_decode_secinfo(struct nfsd4_compoundargs *argp,
1157 struct nfsd4_secinfo *secinfo)
1158 {
1159 DECODE_HEAD;
1160
1161 READ_BUF(4);
1162 secinfo->si_namelen = be32_to_cpup(p++);
1163 READ_BUF(secinfo->si_namelen);
1164 SAVEMEM(secinfo->si_name, secinfo->si_namelen);
1165 status = check_filename(secinfo->si_name, secinfo->si_namelen);
1166 if (status)
1167 return status;
1168 DECODE_TAIL;
1169 }
1170
1171 static __be32
1172 nfsd4_decode_secinfo_no_name(struct nfsd4_compoundargs *argp,
1173 struct nfsd4_secinfo_no_name *sin)
1174 {
1175 DECODE_HEAD;
1176
1177 READ_BUF(4);
1178 sin->sin_style = be32_to_cpup(p++);
1179 DECODE_TAIL;
1180 }
1181
1182 static __be32
1183 nfsd4_decode_setattr(struct nfsd4_compoundargs *argp, struct nfsd4_setattr *setattr)
1184 {
1185 __be32 status;
1186
1187 status = nfsd4_decode_stateid(argp, &setattr->sa_stateid);
1188 if (status)
1189 return status;
1190 return nfsd4_decode_fattr(argp, setattr->sa_bmval, &setattr->sa_iattr,
1191 &setattr->sa_acl, &setattr->sa_label, NULL);
1192 }
1193
1194 static __be32
1195 nfsd4_decode_setclientid(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid *setclientid)
1196 {
1197 DECODE_HEAD;
1198
1199 if (argp->minorversion >= 1)
1200 return nfserr_notsupp;
1201
1202 READ_BUF(NFS4_VERIFIER_SIZE);
1203 COPYMEM(setclientid->se_verf.data, NFS4_VERIFIER_SIZE);
1204
1205 status = nfsd4_decode_opaque(argp, &setclientid->se_name);
1206 if (status)
1207 return nfserr_bad_xdr;
1208 READ_BUF(8);
1209 setclientid->se_callback_prog = be32_to_cpup(p++);
1210 setclientid->se_callback_netid_len = be32_to_cpup(p++);
1211 READ_BUF(setclientid->se_callback_netid_len);
1212 SAVEMEM(setclientid->se_callback_netid_val, setclientid->se_callback_netid_len);
1213 READ_BUF(4);
1214 setclientid->se_callback_addr_len = be32_to_cpup(p++);
1215
1216 READ_BUF(setclientid->se_callback_addr_len);
1217 SAVEMEM(setclientid->se_callback_addr_val, setclientid->se_callback_addr_len);
1218 READ_BUF(4);
1219 setclientid->se_callback_ident = be32_to_cpup(p++);
1220
1221 DECODE_TAIL;
1222 }
1223
1224 static __be32
1225 nfsd4_decode_setclientid_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid_confirm *scd_c)
1226 {
1227 DECODE_HEAD;
1228
1229 if (argp->minorversion >= 1)
1230 return nfserr_notsupp;
1231
1232 READ_BUF(8 + NFS4_VERIFIER_SIZE);
1233 COPYMEM(&scd_c->sc_clientid, 8);
1234 COPYMEM(&scd_c->sc_confirm, NFS4_VERIFIER_SIZE);
1235
1236 DECODE_TAIL;
1237 }
1238
1239 /* Also used for NVERIFY */
1240 static __be32
1241 nfsd4_decode_verify(struct nfsd4_compoundargs *argp, struct nfsd4_verify *verify)
1242 {
1243 DECODE_HEAD;
1244
1245 if ((status = nfsd4_decode_bitmap(argp, verify->ve_bmval)))
1246 goto out;
1247
1248 /* For convenience's sake, we compare raw xdr'd attributes in
1249 * nfsd4_proc_verify */
1250
1251 READ_BUF(4);
1252 verify->ve_attrlen = be32_to_cpup(p++);
1253 READ_BUF(verify->ve_attrlen);
1254 SAVEMEM(verify->ve_attrval, verify->ve_attrlen);
1255
1256 DECODE_TAIL;
1257 }
1258
1259 static __be32
1260 nfsd4_decode_write(struct nfsd4_compoundargs *argp, struct nfsd4_write *write)
1261 {
1262 int avail;
1263 int len;
1264 DECODE_HEAD;
1265
1266 status = nfsd4_decode_stateid(argp, &write->wr_stateid);
1267 if (status)
1268 return status;
1269 READ_BUF(16);
1270 p = xdr_decode_hyper(p, &write->wr_offset);
1271 write->wr_stable_how = be32_to_cpup(p++);
1272 if (write->wr_stable_how > NFS_FILE_SYNC)
1273 goto xdr_error;
1274 write->wr_buflen = be32_to_cpup(p++);
1275
1276 /* Sorry .. no magic macros for this.. *
1277 * READ_BUF(write->wr_buflen);
1278 * SAVEMEM(write->wr_buf, write->wr_buflen);
1279 */
1280 avail = (char*)argp->end - (char*)argp->p;
1281 if (avail + argp->pagelen < write->wr_buflen) {
1282 dprintk("NFSD: xdr error (%s:%d)\n",
1283 __FILE__, __LINE__);
1284 goto xdr_error;
1285 }
1286 write->wr_head.iov_base = p;
1287 write->wr_head.iov_len = avail;
1288 write->wr_pagelist = argp->pagelist;
1289
1290 len = XDR_QUADLEN(write->wr_buflen) << 2;
1291 if (len >= avail) {
1292 int pages;
1293
1294 len -= avail;
1295
1296 pages = len >> PAGE_SHIFT;
1297 argp->pagelist += pages;
1298 argp->pagelen -= pages * PAGE_SIZE;
1299 len -= pages * PAGE_SIZE;
1300
1301 next_decode_page(argp);
1302 }
1303 argp->p += XDR_QUADLEN(len);
1304
1305 DECODE_TAIL;
1306 }
1307
1308 static __be32
1309 nfsd4_decode_release_lockowner(struct nfsd4_compoundargs *argp, struct nfsd4_release_lockowner *rlockowner)
1310 {
1311 DECODE_HEAD;
1312
1313 if (argp->minorversion >= 1)
1314 return nfserr_notsupp;
1315
1316 READ_BUF(12);
1317 COPYMEM(&rlockowner->rl_clientid, sizeof(clientid_t));
1318 rlockowner->rl_owner.len = be32_to_cpup(p++);
1319 READ_BUF(rlockowner->rl_owner.len);
1320 READMEM(rlockowner->rl_owner.data, rlockowner->rl_owner.len);
1321
1322 if (argp->minorversion && !zero_clientid(&rlockowner->rl_clientid))
1323 return nfserr_inval;
1324 DECODE_TAIL;
1325 }
1326
1327 static __be32
1328 nfsd4_decode_exchange_id(struct nfsd4_compoundargs *argp,
1329 struct nfsd4_exchange_id *exid)
1330 {
1331 int dummy, tmp;
1332 DECODE_HEAD;
1333
1334 READ_BUF(NFS4_VERIFIER_SIZE);
1335 COPYMEM(exid->verifier.data, NFS4_VERIFIER_SIZE);
1336
1337 status = nfsd4_decode_opaque(argp, &exid->clname);
1338 if (status)
1339 return nfserr_bad_xdr;
1340
1341 READ_BUF(4);
1342 exid->flags = be32_to_cpup(p++);
1343
1344 /* Ignore state_protect4_a */
1345 READ_BUF(4);
1346 exid->spa_how = be32_to_cpup(p++);
1347 switch (exid->spa_how) {
1348 case SP4_NONE:
1349 break;
1350 case SP4_MACH_CRED:
1351 /* spo_must_enforce */
1352 status = nfsd4_decode_bitmap(argp,
1353 exid->spo_must_enforce);
1354 if (status)
1355 goto out;
1356 /* spo_must_allow */
1357 status = nfsd4_decode_bitmap(argp, exid->spo_must_allow);
1358 if (status)
1359 goto out;
1360 break;
1361 case SP4_SSV:
1362 /* ssp_ops */
1363 READ_BUF(4);
1364 dummy = be32_to_cpup(p++);
1365 READ_BUF(dummy * 4);
1366 p += dummy;
1367
1368 READ_BUF(4);
1369 dummy = be32_to_cpup(p++);
1370 READ_BUF(dummy * 4);
1371 p += dummy;
1372
1373 /* ssp_hash_algs<> */
1374 READ_BUF(4);
1375 tmp = be32_to_cpup(p++);
1376 while (tmp--) {
1377 READ_BUF(4);
1378 dummy = be32_to_cpup(p++);
1379 READ_BUF(dummy);
1380 p += XDR_QUADLEN(dummy);
1381 }
1382
1383 /* ssp_encr_algs<> */
1384 READ_BUF(4);
1385 tmp = be32_to_cpup(p++);
1386 while (tmp--) {
1387 READ_BUF(4);
1388 dummy = be32_to_cpup(p++);
1389 READ_BUF(dummy);
1390 p += XDR_QUADLEN(dummy);
1391 }
1392
1393 /* ssp_window and ssp_num_gss_handles */
1394 READ_BUF(8);
1395 dummy = be32_to_cpup(p++);
1396 dummy = be32_to_cpup(p++);
1397 break;
1398 default:
1399 goto xdr_error;
1400 }
1401
1402 /* Ignore Implementation ID */
1403 READ_BUF(4); /* nfs_impl_id4 array length */
1404 dummy = be32_to_cpup(p++);
1405
1406 if (dummy > 1)
1407 goto xdr_error;
1408
1409 if (dummy == 1) {
1410 /* nii_domain */
1411 READ_BUF(4);
1412 dummy = be32_to_cpup(p++);
1413 READ_BUF(dummy);
1414 p += XDR_QUADLEN(dummy);
1415
1416 /* nii_name */
1417 READ_BUF(4);
1418 dummy = be32_to_cpup(p++);
1419 READ_BUF(dummy);
1420 p += XDR_QUADLEN(dummy);
1421
1422 /* nii_date */
1423 READ_BUF(12);
1424 p += 3;
1425 }
1426 DECODE_TAIL;
1427 }
1428
1429 static __be32
1430 nfsd4_decode_create_session(struct nfsd4_compoundargs *argp,
1431 struct nfsd4_create_session *sess)
1432 {
1433 DECODE_HEAD;
1434 u32 dummy;
1435
1436 READ_BUF(16);
1437 COPYMEM(&sess->clientid, 8);
1438 sess->seqid = be32_to_cpup(p++);
1439 sess->flags = be32_to_cpup(p++);
1440
1441 /* Fore channel attrs */
1442 READ_BUF(28);
1443 dummy = be32_to_cpup(p++); /* headerpadsz is always 0 */
1444 sess->fore_channel.maxreq_sz = be32_to_cpup(p++);
1445 sess->fore_channel.maxresp_sz = be32_to_cpup(p++);
1446 sess->fore_channel.maxresp_cached = be32_to_cpup(p++);
1447 sess->fore_channel.maxops = be32_to_cpup(p++);
1448 sess->fore_channel.maxreqs = be32_to_cpup(p++);
1449 sess->fore_channel.nr_rdma_attrs = be32_to_cpup(p++);
1450 if (sess->fore_channel.nr_rdma_attrs == 1) {
1451 READ_BUF(4);
1452 sess->fore_channel.rdma_attrs = be32_to_cpup(p++);
1453 } else if (sess->fore_channel.nr_rdma_attrs > 1) {
1454 dprintk("Too many fore channel attr bitmaps!\n");
1455 goto xdr_error;
1456 }
1457
1458 /* Back channel attrs */
1459 READ_BUF(28);
1460 dummy = be32_to_cpup(p++); /* headerpadsz is always 0 */
1461 sess->back_channel.maxreq_sz = be32_to_cpup(p++);
1462 sess->back_channel.maxresp_sz = be32_to_cpup(p++);
1463 sess->back_channel.maxresp_cached = be32_to_cpup(p++);
1464 sess->back_channel.maxops = be32_to_cpup(p++);
1465 sess->back_channel.maxreqs = be32_to_cpup(p++);
1466 sess->back_channel.nr_rdma_attrs = be32_to_cpup(p++);
1467 if (sess->back_channel.nr_rdma_attrs == 1) {
1468 READ_BUF(4);
1469 sess->back_channel.rdma_attrs = be32_to_cpup(p++);
1470 } else if (sess->back_channel.nr_rdma_attrs > 1) {
1471 dprintk("Too many back channel attr bitmaps!\n");
1472 goto xdr_error;
1473 }
1474
1475 READ_BUF(4);
1476 sess->callback_prog = be32_to_cpup(p++);
1477 nfsd4_decode_cb_sec(argp, &sess->cb_sec);
1478 DECODE_TAIL;
1479 }
1480
1481 static __be32
1482 nfsd4_decode_destroy_session(struct nfsd4_compoundargs *argp,
1483 struct nfsd4_destroy_session *destroy_session)
1484 {
1485 DECODE_HEAD;
1486 READ_BUF(NFS4_MAX_SESSIONID_LEN);
1487 COPYMEM(destroy_session->sessionid.data, NFS4_MAX_SESSIONID_LEN);
1488
1489 DECODE_TAIL;
1490 }
1491
1492 static __be32
1493 nfsd4_decode_free_stateid(struct nfsd4_compoundargs *argp,
1494 struct nfsd4_free_stateid *free_stateid)
1495 {
1496 DECODE_HEAD;
1497
1498 READ_BUF(sizeof(stateid_t));
1499 free_stateid->fr_stateid.si_generation = be32_to_cpup(p++);
1500 COPYMEM(&free_stateid->fr_stateid.si_opaque, sizeof(stateid_opaque_t));
1501
1502 DECODE_TAIL;
1503 }
1504
1505 static __be32
1506 nfsd4_decode_sequence(struct nfsd4_compoundargs *argp,
1507 struct nfsd4_sequence *seq)
1508 {
1509 DECODE_HEAD;
1510
1511 READ_BUF(NFS4_MAX_SESSIONID_LEN + 16);
1512 COPYMEM(seq->sessionid.data, NFS4_MAX_SESSIONID_LEN);
1513 seq->seqid = be32_to_cpup(p++);
1514 seq->slotid = be32_to_cpup(p++);
1515 seq->maxslots = be32_to_cpup(p++);
1516 seq->cachethis = be32_to_cpup(p++);
1517
1518 DECODE_TAIL;
1519 }
1520
1521 static __be32
1522 nfsd4_decode_test_stateid(struct nfsd4_compoundargs *argp, struct nfsd4_test_stateid *test_stateid)
1523 {
1524 int i;
1525 __be32 *p, status;
1526 struct nfsd4_test_stateid_id *stateid;
1527
1528 READ_BUF(4);
1529 test_stateid->ts_num_ids = ntohl(*p++);
1530
1531 INIT_LIST_HEAD(&test_stateid->ts_stateid_list);
1532
1533 for (i = 0; i < test_stateid->ts_num_ids; i++) {
1534 stateid = svcxdr_tmpalloc(argp, sizeof(*stateid));
1535 if (!stateid) {
1536 status = nfserrno(-ENOMEM);
1537 goto out;
1538 }
1539
1540 INIT_LIST_HEAD(&stateid->ts_id_list);
1541 list_add_tail(&stateid->ts_id_list, &test_stateid->ts_stateid_list);
1542
1543 status = nfsd4_decode_stateid(argp, &stateid->ts_id_stateid);
1544 if (status)
1545 goto out;
1546 }
1547
1548 status = 0;
1549 out:
1550 return status;
1551 xdr_error:
1552 dprintk("NFSD: xdr error (%s:%d)\n", __FILE__, __LINE__);
1553 status = nfserr_bad_xdr;
1554 goto out;
1555 }
1556
1557 static __be32 nfsd4_decode_destroy_clientid(struct nfsd4_compoundargs *argp, struct nfsd4_destroy_clientid *dc)
1558 {
1559 DECODE_HEAD;
1560
1561 READ_BUF(8);
1562 COPYMEM(&dc->clientid, 8);
1563
1564 DECODE_TAIL;
1565 }
1566
1567 static __be32 nfsd4_decode_reclaim_complete(struct nfsd4_compoundargs *argp, struct nfsd4_reclaim_complete *rc)
1568 {
1569 DECODE_HEAD;
1570
1571 READ_BUF(4);
1572 rc->rca_one_fs = be32_to_cpup(p++);
1573
1574 DECODE_TAIL;
1575 }
1576
1577 #ifdef CONFIG_NFSD_PNFS
1578 static __be32
1579 nfsd4_decode_getdeviceinfo(struct nfsd4_compoundargs *argp,
1580 struct nfsd4_getdeviceinfo *gdev)
1581 {
1582 DECODE_HEAD;
1583 u32 num, i;
1584
1585 READ_BUF(sizeof(struct nfsd4_deviceid) + 3 * 4);
1586 COPYMEM(&gdev->gd_devid, sizeof(struct nfsd4_deviceid));
1587 gdev->gd_layout_type = be32_to_cpup(p++);
1588 gdev->gd_maxcount = be32_to_cpup(p++);
1589 num = be32_to_cpup(p++);
1590 if (num) {
1591 if (num > 1000)
1592 goto xdr_error;
1593 READ_BUF(4 * num);
1594 gdev->gd_notify_types = be32_to_cpup(p++);
1595 for (i = 1; i < num; i++) {
1596 if (be32_to_cpup(p++)) {
1597 status = nfserr_inval;
1598 goto out;
1599 }
1600 }
1601 }
1602 DECODE_TAIL;
1603 }
1604
1605 static __be32
1606 nfsd4_decode_layoutget(struct nfsd4_compoundargs *argp,
1607 struct nfsd4_layoutget *lgp)
1608 {
1609 DECODE_HEAD;
1610
1611 READ_BUF(36);
1612 lgp->lg_signal = be32_to_cpup(p++);
1613 lgp->lg_layout_type = be32_to_cpup(p++);
1614 lgp->lg_seg.iomode = be32_to_cpup(p++);
1615 p = xdr_decode_hyper(p, &lgp->lg_seg.offset);
1616 p = xdr_decode_hyper(p, &lgp->lg_seg.length);
1617 p = xdr_decode_hyper(p, &lgp->lg_minlength);
1618
1619 status = nfsd4_decode_stateid(argp, &lgp->lg_sid);
1620 if (status)
1621 return status;
1622
1623 READ_BUF(4);
1624 lgp->lg_maxcount = be32_to_cpup(p++);
1625
1626 DECODE_TAIL;
1627 }
1628
1629 static __be32
1630 nfsd4_decode_layoutcommit(struct nfsd4_compoundargs *argp,
1631 struct nfsd4_layoutcommit *lcp)
1632 {
1633 DECODE_HEAD;
1634 u32 timechange;
1635
1636 READ_BUF(20);
1637 p = xdr_decode_hyper(p, &lcp->lc_seg.offset);
1638 p = xdr_decode_hyper(p, &lcp->lc_seg.length);
1639 lcp->lc_reclaim = be32_to_cpup(p++);
1640
1641 status = nfsd4_decode_stateid(argp, &lcp->lc_sid);
1642 if (status)
1643 return status;
1644
1645 READ_BUF(4);
1646 lcp->lc_newoffset = be32_to_cpup(p++);
1647 if (lcp->lc_newoffset) {
1648 READ_BUF(8);
1649 p = xdr_decode_hyper(p, &lcp->lc_last_wr);
1650 } else
1651 lcp->lc_last_wr = 0;
1652 READ_BUF(4);
1653 timechange = be32_to_cpup(p++);
1654 if (timechange) {
1655 status = nfsd4_decode_time(argp, &lcp->lc_mtime);
1656 if (status)
1657 return status;
1658 } else {
1659 lcp->lc_mtime.tv_nsec = UTIME_NOW;
1660 }
1661 READ_BUF(8);
1662 lcp->lc_layout_type = be32_to_cpup(p++);
1663
1664 /*
1665 * Save the layout update in XDR format and let the layout driver deal
1666 * with it later.
1667 */
1668 lcp->lc_up_len = be32_to_cpup(p++);
1669 if (lcp->lc_up_len > 0) {
1670 READ_BUF(lcp->lc_up_len);
1671 READMEM(lcp->lc_up_layout, lcp->lc_up_len);
1672 }
1673
1674 DECODE_TAIL;
1675 }
1676
1677 static __be32
1678 nfsd4_decode_layoutreturn(struct nfsd4_compoundargs *argp,
1679 struct nfsd4_layoutreturn *lrp)
1680 {
1681 DECODE_HEAD;
1682
1683 READ_BUF(16);
1684 lrp->lr_reclaim = be32_to_cpup(p++);
1685 lrp->lr_layout_type = be32_to_cpup(p++);
1686 lrp->lr_seg.iomode = be32_to_cpup(p++);
1687 lrp->lr_return_type = be32_to_cpup(p++);
1688 if (lrp->lr_return_type == RETURN_FILE) {
1689 READ_BUF(16);
1690 p = xdr_decode_hyper(p, &lrp->lr_seg.offset);
1691 p = xdr_decode_hyper(p, &lrp->lr_seg.length);
1692
1693 status = nfsd4_decode_stateid(argp, &lrp->lr_sid);
1694 if (status)
1695 return status;
1696
1697 READ_BUF(4);
1698 lrp->lrf_body_len = be32_to_cpup(p++);
1699 if (lrp->lrf_body_len > 0) {
1700 READ_BUF(lrp->lrf_body_len);
1701 READMEM(lrp->lrf_body, lrp->lrf_body_len);
1702 }
1703 } else {
1704 lrp->lr_seg.offset = 0;
1705 lrp->lr_seg.length = NFS4_MAX_UINT64;
1706 }
1707
1708 DECODE_TAIL;
1709 }
1710 #endif /* CONFIG_NFSD_PNFS */
1711
1712 static __be32
1713 nfsd4_decode_fallocate(struct nfsd4_compoundargs *argp,
1714 struct nfsd4_fallocate *fallocate)
1715 {
1716 DECODE_HEAD;
1717
1718 status = nfsd4_decode_stateid(argp, &fallocate->falloc_stateid);
1719 if (status)
1720 return status;
1721
1722 READ_BUF(16);
1723 p = xdr_decode_hyper(p, &fallocate->falloc_offset);
1724 xdr_decode_hyper(p, &fallocate->falloc_length);
1725
1726 DECODE_TAIL;
1727 }
1728
1729 static __be32
1730 nfsd4_decode_clone(struct nfsd4_compoundargs *argp, struct nfsd4_clone *clone)
1731 {
1732 DECODE_HEAD;
1733
1734 status = nfsd4_decode_stateid(argp, &clone->cl_src_stateid);
1735 if (status)
1736 return status;
1737 status = nfsd4_decode_stateid(argp, &clone->cl_dst_stateid);
1738 if (status)
1739 return status;
1740
1741 READ_BUF(8 + 8 + 8);
1742 p = xdr_decode_hyper(p, &clone->cl_src_pos);
1743 p = xdr_decode_hyper(p, &clone->cl_dst_pos);
1744 p = xdr_decode_hyper(p, &clone->cl_count);
1745 DECODE_TAIL;
1746 }
1747
1748 static __be32
1749 nfsd4_decode_copy(struct nfsd4_compoundargs *argp, struct nfsd4_copy *copy)
1750 {
1751 DECODE_HEAD;
1752 unsigned int tmp;
1753
1754 status = nfsd4_decode_stateid(argp, &copy->cp_src_stateid);
1755 if (status)
1756 return status;
1757 status = nfsd4_decode_stateid(argp, &copy->cp_dst_stateid);
1758 if (status)
1759 return status;
1760
1761 READ_BUF(8 + 8 + 8 + 4 + 4 + 4);
1762 p = xdr_decode_hyper(p, &copy->cp_src_pos);
1763 p = xdr_decode_hyper(p, &copy->cp_dst_pos);
1764 p = xdr_decode_hyper(p, &copy->cp_count);
1765 p++; /* ca_consecutive: we always do consecutive copies */
1766 copy->cp_synchronous = be32_to_cpup(p++);
1767 tmp = be32_to_cpup(p); /* Source server list not supported */
1768
1769 DECODE_TAIL;
1770 }
1771
1772 static __be32
1773 nfsd4_decode_seek(struct nfsd4_compoundargs *argp, struct nfsd4_seek *seek)
1774 {
1775 DECODE_HEAD;
1776
1777 status = nfsd4_decode_stateid(argp, &seek->seek_stateid);
1778 if (status)
1779 return status;
1780
1781 READ_BUF(8 + 4);
1782 p = xdr_decode_hyper(p, &seek->seek_offset);
1783 seek->seek_whence = be32_to_cpup(p);
1784
1785 DECODE_TAIL;
1786 }
1787
1788 static __be32
1789 nfsd4_decode_noop(struct nfsd4_compoundargs *argp, void *p)
1790 {
1791 return nfs_ok;
1792 }
1793
1794 static __be32
1795 nfsd4_decode_notsupp(struct nfsd4_compoundargs *argp, void *p)
1796 {
1797 return nfserr_notsupp;
1798 }
1799
1800 typedef __be32(*nfsd4_dec)(struct nfsd4_compoundargs *argp, void *);
1801
1802 static const nfsd4_dec nfsd4_dec_ops[] = {
1803 [OP_ACCESS] = (nfsd4_dec)nfsd4_decode_access,
1804 [OP_CLOSE] = (nfsd4_dec)nfsd4_decode_close,
1805 [OP_COMMIT] = (nfsd4_dec)nfsd4_decode_commit,
1806 [OP_CREATE] = (nfsd4_dec)nfsd4_decode_create,
1807 [OP_DELEGPURGE] = (nfsd4_dec)nfsd4_decode_notsupp,
1808 [OP_DELEGRETURN] = (nfsd4_dec)nfsd4_decode_delegreturn,
1809 [OP_GETATTR] = (nfsd4_dec)nfsd4_decode_getattr,
1810 [OP_GETFH] = (nfsd4_dec)nfsd4_decode_noop,
1811 [OP_LINK] = (nfsd4_dec)nfsd4_decode_link,
1812 [OP_LOCK] = (nfsd4_dec)nfsd4_decode_lock,
1813 [OP_LOCKT] = (nfsd4_dec)nfsd4_decode_lockt,
1814 [OP_LOCKU] = (nfsd4_dec)nfsd4_decode_locku,
1815 [OP_LOOKUP] = (nfsd4_dec)nfsd4_decode_lookup,
1816 [OP_LOOKUPP] = (nfsd4_dec)nfsd4_decode_noop,
1817 [OP_NVERIFY] = (nfsd4_dec)nfsd4_decode_verify,
1818 [OP_OPEN] = (nfsd4_dec)nfsd4_decode_open,
1819 [OP_OPENATTR] = (nfsd4_dec)nfsd4_decode_notsupp,
1820 [OP_OPEN_CONFIRM] = (nfsd4_dec)nfsd4_decode_open_confirm,
1821 [OP_OPEN_DOWNGRADE] = (nfsd4_dec)nfsd4_decode_open_downgrade,
1822 [OP_PUTFH] = (nfsd4_dec)nfsd4_decode_putfh,
1823 [OP_PUTPUBFH] = (nfsd4_dec)nfsd4_decode_putpubfh,
1824 [OP_PUTROOTFH] = (nfsd4_dec)nfsd4_decode_noop,
1825 [OP_READ] = (nfsd4_dec)nfsd4_decode_read,
1826 [OP_READDIR] = (nfsd4_dec)nfsd4_decode_readdir,
1827 [OP_READLINK] = (nfsd4_dec)nfsd4_decode_noop,
1828 [OP_REMOVE] = (nfsd4_dec)nfsd4_decode_remove,
1829 [OP_RENAME] = (nfsd4_dec)nfsd4_decode_rename,
1830 [OP_RENEW] = (nfsd4_dec)nfsd4_decode_renew,
1831 [OP_RESTOREFH] = (nfsd4_dec)nfsd4_decode_noop,
1832 [OP_SAVEFH] = (nfsd4_dec)nfsd4_decode_noop,
1833 [OP_SECINFO] = (nfsd4_dec)nfsd4_decode_secinfo,
1834 [OP_SETATTR] = (nfsd4_dec)nfsd4_decode_setattr,
1835 [OP_SETCLIENTID] = (nfsd4_dec)nfsd4_decode_setclientid,
1836 [OP_SETCLIENTID_CONFIRM] = (nfsd4_dec)nfsd4_decode_setclientid_confirm,
1837 [OP_VERIFY] = (nfsd4_dec)nfsd4_decode_verify,
1838 [OP_WRITE] = (nfsd4_dec)nfsd4_decode_write,
1839 [OP_RELEASE_LOCKOWNER] = (nfsd4_dec)nfsd4_decode_release_lockowner,
1840
1841 /* new operations for NFSv4.1 */
1842 [OP_BACKCHANNEL_CTL] = (nfsd4_dec)nfsd4_decode_backchannel_ctl,
1843 [OP_BIND_CONN_TO_SESSION]= (nfsd4_dec)nfsd4_decode_bind_conn_to_session,
1844 [OP_EXCHANGE_ID] = (nfsd4_dec)nfsd4_decode_exchange_id,
1845 [OP_CREATE_SESSION] = (nfsd4_dec)nfsd4_decode_create_session,
1846 [OP_DESTROY_SESSION] = (nfsd4_dec)nfsd4_decode_destroy_session,
1847 [OP_FREE_STATEID] = (nfsd4_dec)nfsd4_decode_free_stateid,
1848 [OP_GET_DIR_DELEGATION] = (nfsd4_dec)nfsd4_decode_notsupp,
1849 #ifdef CONFIG_NFSD_PNFS
1850 [OP_GETDEVICEINFO] = (nfsd4_dec)nfsd4_decode_getdeviceinfo,
1851 [OP_GETDEVICELIST] = (nfsd4_dec)nfsd4_decode_notsupp,
1852 [OP_LAYOUTCOMMIT] = (nfsd4_dec)nfsd4_decode_layoutcommit,
1853 [OP_LAYOUTGET] = (nfsd4_dec)nfsd4_decode_layoutget,
1854 [OP_LAYOUTRETURN] = (nfsd4_dec)nfsd4_decode_layoutreturn,
1855 #else
1856 [OP_GETDEVICEINFO] = (nfsd4_dec)nfsd4_decode_notsupp,
1857 [OP_GETDEVICELIST] = (nfsd4_dec)nfsd4_decode_notsupp,
1858 [OP_LAYOUTCOMMIT] = (nfsd4_dec)nfsd4_decode_notsupp,
1859 [OP_LAYOUTGET] = (nfsd4_dec)nfsd4_decode_notsupp,
1860 [OP_LAYOUTRETURN] = (nfsd4_dec)nfsd4_decode_notsupp,
1861 #endif
1862 [OP_SECINFO_NO_NAME] = (nfsd4_dec)nfsd4_decode_secinfo_no_name,
1863 [OP_SEQUENCE] = (nfsd4_dec)nfsd4_decode_sequence,
1864 [OP_SET_SSV] = (nfsd4_dec)nfsd4_decode_notsupp,
1865 [OP_TEST_STATEID] = (nfsd4_dec)nfsd4_decode_test_stateid,
1866 [OP_WANT_DELEGATION] = (nfsd4_dec)nfsd4_decode_notsupp,
1867 [OP_DESTROY_CLIENTID] = (nfsd4_dec)nfsd4_decode_destroy_clientid,
1868 [OP_RECLAIM_COMPLETE] = (nfsd4_dec)nfsd4_decode_reclaim_complete,
1869
1870 /* new operations for NFSv4.2 */
1871 [OP_ALLOCATE] = (nfsd4_dec)nfsd4_decode_fallocate,
1872 [OP_COPY] = (nfsd4_dec)nfsd4_decode_copy,
1873 [OP_COPY_NOTIFY] = (nfsd4_dec)nfsd4_decode_notsupp,
1874 [OP_DEALLOCATE] = (nfsd4_dec)nfsd4_decode_fallocate,
1875 [OP_IO_ADVISE] = (nfsd4_dec)nfsd4_decode_notsupp,
1876 [OP_LAYOUTERROR] = (nfsd4_dec)nfsd4_decode_notsupp,
1877 [OP_LAYOUTSTATS] = (nfsd4_dec)nfsd4_decode_notsupp,
1878 [OP_OFFLOAD_CANCEL] = (nfsd4_dec)nfsd4_decode_notsupp,
1879 [OP_OFFLOAD_STATUS] = (nfsd4_dec)nfsd4_decode_notsupp,
1880 [OP_READ_PLUS] = (nfsd4_dec)nfsd4_decode_notsupp,
1881 [OP_SEEK] = (nfsd4_dec)nfsd4_decode_seek,
1882 [OP_WRITE_SAME] = (nfsd4_dec)nfsd4_decode_notsupp,
1883 [OP_CLONE] = (nfsd4_dec)nfsd4_decode_clone,
1884 };
1885
1886 static inline bool
1887 nfsd4_opnum_in_range(struct nfsd4_compoundargs *argp, struct nfsd4_op *op)
1888 {
1889 if (op->opnum < FIRST_NFS4_OP)
1890 return false;
1891 else if (argp->minorversion == 0 && op->opnum > LAST_NFS40_OP)
1892 return false;
1893 else if (argp->minorversion == 1 && op->opnum > LAST_NFS41_OP)
1894 return false;
1895 else if (argp->minorversion == 2 && op->opnum > LAST_NFS42_OP)
1896 return false;
1897 return true;
1898 }
1899
1900 static __be32
1901 nfsd4_decode_compound(struct nfsd4_compoundargs *argp)
1902 {
1903 DECODE_HEAD;
1904 struct nfsd4_op *op;
1905 bool cachethis = false;
1906 int auth_slack= argp->rqstp->rq_auth_slack;
1907 int max_reply = auth_slack + 8; /* opcnt, status */
1908 int readcount = 0;
1909 int readbytes = 0;
1910 int i;
1911
1912 READ_BUF(4);
1913 argp->taglen = be32_to_cpup(p++);
1914 READ_BUF(argp->taglen);
1915 SAVEMEM(argp->tag, argp->taglen);
1916 READ_BUF(8);
1917 argp->minorversion = be32_to_cpup(p++);
1918 argp->opcnt = be32_to_cpup(p++);
1919 max_reply += 4 + (XDR_QUADLEN(argp->taglen) << 2);
1920
1921 if (argp->taglen > NFSD4_MAX_TAGLEN)
1922 goto xdr_error;
1923 /*
1924 * NFS4ERR_RESOURCE is a more helpful error than GARBAGE_ARGS
1925 * here, so we return success at the xdr level so that
1926 * nfsd4_proc can handle this is an NFS-level error.
1927 */
1928 if (argp->opcnt > NFSD_MAX_OPS_PER_COMPOUND)
1929 return 0;
1930
1931 if (argp->opcnt > ARRAY_SIZE(argp->iops)) {
1932 argp->ops = kzalloc(argp->opcnt * sizeof(*argp->ops), GFP_KERNEL);
1933 if (!argp->ops) {
1934 argp->ops = argp->iops;
1935 dprintk("nfsd: couldn't allocate room for COMPOUND\n");
1936 goto xdr_error;
1937 }
1938 }
1939
1940 if (argp->minorversion > NFSD_SUPPORTED_MINOR_VERSION)
1941 argp->opcnt = 0;
1942
1943 for (i = 0; i < argp->opcnt; i++) {
1944 op = &argp->ops[i];
1945 op->replay = NULL;
1946
1947 READ_BUF(4);
1948 op->opnum = be32_to_cpup(p++);
1949
1950 if (nfsd4_opnum_in_range(argp, op))
1951 op->status = nfsd4_dec_ops[op->opnum](argp, &op->u);
1952 else {
1953 op->opnum = OP_ILLEGAL;
1954 op->status = nfserr_op_illegal;
1955 }
1956 op->opdesc = OPDESC(op);
1957 /*
1958 * We'll try to cache the result in the DRC if any one
1959 * op in the compound wants to be cached:
1960 */
1961 cachethis |= nfsd4_cache_this_op(op);
1962
1963 if (op->opnum == OP_READ) {
1964 readcount++;
1965 readbytes += nfsd4_max_reply(argp->rqstp, op);
1966 } else
1967 max_reply += nfsd4_max_reply(argp->rqstp, op);
1968 /*
1969 * OP_LOCK and OP_LOCKT may return a conflicting lock.
1970 * (Special case because it will just skip encoding this
1971 * if it runs out of xdr buffer space, and it is the only
1972 * operation that behaves this way.)
1973 */
1974 if (op->opnum == OP_LOCK || op->opnum == OP_LOCKT)
1975 max_reply += NFS4_OPAQUE_LIMIT;
1976
1977 if (op->status) {
1978 argp->opcnt = i+1;
1979 break;
1980 }
1981 }
1982 /* Sessions make the DRC unnecessary: */
1983 if (argp->minorversion)
1984 cachethis = false;
1985 svc_reserve(argp->rqstp, max_reply + readbytes);
1986 argp->rqstp->rq_cachetype = cachethis ? RC_REPLBUFF : RC_NOCACHE;
1987
1988 if (readcount > 1 || max_reply > PAGE_SIZE - auth_slack)
1989 clear_bit(RQ_SPLICE_OK, &argp->rqstp->rq_flags);
1990
1991 DECODE_TAIL;
1992 }
1993
1994 static __be32 *encode_change(__be32 *p, struct kstat *stat, struct inode *inode,
1995 struct svc_export *exp)
1996 {
1997 if (exp->ex_flags & NFSEXP_V4ROOT) {
1998 *p++ = cpu_to_be32(convert_to_wallclock(exp->cd->flush_time));
1999 *p++ = 0;
2000 } else if (IS_I_VERSION(inode)) {
2001 p = xdr_encode_hyper(p, nfsd4_change_attribute(stat, inode));
2002 } else {
2003 *p++ = cpu_to_be32(stat->ctime.tv_sec);
2004 *p++ = cpu_to_be32(stat->ctime.tv_nsec);
2005 }
2006 return p;
2007 }
2008
2009 static __be32 *encode_cinfo(__be32 *p, struct nfsd4_change_info *c)
2010 {
2011 *p++ = cpu_to_be32(c->atomic);
2012 if (c->change_supported) {
2013 p = xdr_encode_hyper(p, c->before_change);
2014 p = xdr_encode_hyper(p, c->after_change);
2015 } else {
2016 *p++ = cpu_to_be32(c->before_ctime_sec);
2017 *p++ = cpu_to_be32(c->before_ctime_nsec);
2018 *p++ = cpu_to_be32(c->after_ctime_sec);
2019 *p++ = cpu_to_be32(c->after_ctime_nsec);
2020 }
2021 return p;
2022 }
2023
2024 /* Encode as an array of strings the string given with components
2025 * separated @sep, escaped with esc_enter and esc_exit.
2026 */
2027 static __be32 nfsd4_encode_components_esc(struct xdr_stream *xdr, char sep,
2028 char *components, char esc_enter,
2029 char esc_exit)
2030 {
2031 __be32 *p;
2032 __be32 pathlen;
2033 int pathlen_offset;
2034 int strlen, count=0;
2035 char *str, *end, *next;
2036
2037 dprintk("nfsd4_encode_components(%s)\n", components);
2038
2039 pathlen_offset = xdr->buf->len;
2040 p = xdr_reserve_space(xdr, 4);
2041 if (!p)
2042 return nfserr_resource;
2043 p++; /* We will fill this in with @count later */
2044
2045 end = str = components;
2046 while (*end) {
2047 bool found_esc = false;
2048
2049 /* try to parse as esc_start, ..., esc_end, sep */
2050 if (*str == esc_enter) {
2051 for (; *end && (*end != esc_exit); end++)
2052 /* find esc_exit or end of string */;
2053 next = end + 1;
2054 if (*end && (!*next || *next == sep)) {
2055 str++;
2056 found_esc = true;
2057 }
2058 }
2059
2060 if (!found_esc)
2061 for (; *end && (*end != sep); end++)
2062 /* find sep or end of string */;
2063
2064 strlen = end - str;
2065 if (strlen) {
2066 p = xdr_reserve_space(xdr, strlen + 4);
2067 if (!p)
2068 return nfserr_resource;
2069 p = xdr_encode_opaque(p, str, strlen);
2070 count++;
2071 }
2072 else
2073 end++;
2074 if (found_esc)
2075 end = next;
2076
2077 str = end;
2078 }
2079 pathlen = htonl(count);
2080 write_bytes_to_xdr_buf(xdr->buf, pathlen_offset, &pathlen, 4);
2081 return 0;
2082 }
2083
2084 /* Encode as an array of strings the string given with components
2085 * separated @sep.
2086 */
2087 static __be32 nfsd4_encode_components(struct xdr_stream *xdr, char sep,
2088 char *components)
2089 {
2090 return nfsd4_encode_components_esc(xdr, sep, components, 0, 0);
2091 }
2092
2093 /*
2094 * encode a location element of a fs_locations structure
2095 */
2096 static __be32 nfsd4_encode_fs_location4(struct xdr_stream *xdr,
2097 struct nfsd4_fs_location *location)
2098 {
2099 __be32 status;
2100
2101 status = nfsd4_encode_components_esc(xdr, ':', location->hosts,
2102 '[', ']');
2103 if (status)
2104 return status;
2105 status = nfsd4_encode_components(xdr, '/', location->path);
2106 if (status)
2107 return status;
2108 return 0;
2109 }
2110
2111 /*
2112 * Encode a path in RFC3530 'pathname4' format
2113 */
2114 static __be32 nfsd4_encode_path(struct xdr_stream *xdr,
2115 const struct path *root,
2116 const struct path *path)
2117 {
2118 struct path cur = *path;
2119 __be32 *p;
2120 struct dentry **components = NULL;
2121 unsigned int ncomponents = 0;
2122 __be32 err = nfserr_jukebox;
2123
2124 dprintk("nfsd4_encode_components(");
2125
2126 path_get(&cur);
2127 /* First walk the path up to the nfsd root, and store the
2128 * dentries/path components in an array.
2129 */
2130 for (;;) {
2131 if (path_equal(&cur, root))
2132 break;
2133 if (cur.dentry == cur.mnt->mnt_root) {
2134 if (follow_up(&cur))
2135 continue;
2136 goto out_free;
2137 }
2138 if ((ncomponents & 15) == 0) {
2139 struct dentry **new;
2140 new = krealloc(components,
2141 sizeof(*new) * (ncomponents + 16),
2142 GFP_KERNEL);
2143 if (!new)
2144 goto out_free;
2145 components = new;
2146 }
2147 components[ncomponents++] = cur.dentry;
2148 cur.dentry = dget_parent(cur.dentry);
2149 }
2150 err = nfserr_resource;
2151 p = xdr_reserve_space(xdr, 4);
2152 if (!p)
2153 goto out_free;
2154 *p++ = cpu_to_be32(ncomponents);
2155
2156 while (ncomponents) {
2157 struct dentry *dentry = components[ncomponents - 1];
2158 unsigned int len;
2159
2160 spin_lock(&dentry->d_lock);
2161 len = dentry->d_name.len;
2162 p = xdr_reserve_space(xdr, len + 4);
2163 if (!p) {
2164 spin_unlock(&dentry->d_lock);
2165 goto out_free;
2166 }
2167 p = xdr_encode_opaque(p, dentry->d_name.name, len);
2168 dprintk("/%pd", dentry);
2169 spin_unlock(&dentry->d_lock);
2170 dput(dentry);
2171 ncomponents--;
2172 }
2173
2174 err = 0;
2175 out_free:
2176 dprintk(")\n");
2177 while (ncomponents)
2178 dput(components[--ncomponents]);
2179 kfree(components);
2180 path_put(&cur);
2181 return err;
2182 }
2183
2184 static __be32 nfsd4_encode_fsloc_fsroot(struct xdr_stream *xdr,
2185 struct svc_rqst *rqstp, const struct path *path)
2186 {
2187 struct svc_export *exp_ps;
2188 __be32 res;
2189
2190 exp_ps = rqst_find_fsidzero_export(rqstp);
2191 if (IS_ERR(exp_ps))
2192 return nfserrno(PTR_ERR(exp_ps));
2193 res = nfsd4_encode_path(xdr, &exp_ps->ex_path, path);
2194 exp_put(exp_ps);
2195 return res;
2196 }
2197
2198 /*
2199 * encode a fs_locations structure
2200 */
2201 static __be32 nfsd4_encode_fs_locations(struct xdr_stream *xdr,
2202 struct svc_rqst *rqstp, struct svc_export *exp)
2203 {
2204 __be32 status;
2205 int i;
2206 __be32 *p;
2207 struct nfsd4_fs_locations *fslocs = &exp->ex_fslocs;
2208
2209 status = nfsd4_encode_fsloc_fsroot(xdr, rqstp, &exp->ex_path);
2210 if (status)
2211 return status;
2212 p = xdr_reserve_space(xdr, 4);
2213 if (!p)
2214 return nfserr_resource;
2215 *p++ = cpu_to_be32(fslocs->locations_count);
2216 for (i=0; i<fslocs->locations_count; i++) {
2217 status = nfsd4_encode_fs_location4(xdr, &fslocs->locations[i]);
2218 if (status)
2219 return status;
2220 }
2221 return 0;
2222 }
2223
2224 static u32 nfs4_file_type(umode_t mode)
2225 {
2226 switch (mode & S_IFMT) {
2227 case S_IFIFO: return NF4FIFO;
2228 case S_IFCHR: return NF4CHR;
2229 case S_IFDIR: return NF4DIR;
2230 case S_IFBLK: return NF4BLK;
2231 case S_IFLNK: return NF4LNK;
2232 case S_IFREG: return NF4REG;
2233 case S_IFSOCK: return NF4SOCK;
2234 default: return NF4BAD;
2235 };
2236 }
2237
2238 static inline __be32
2239 nfsd4_encode_aclname(struct xdr_stream *xdr, struct svc_rqst *rqstp,
2240 struct nfs4_ace *ace)
2241 {
2242 if (ace->whotype != NFS4_ACL_WHO_NAMED)
2243 return nfs4_acl_write_who(xdr, ace->whotype);
2244 else if (ace->flag & NFS4_ACE_IDENTIFIER_GROUP)
2245 return nfsd4_encode_group(xdr, rqstp, ace->who_gid);
2246 else
2247 return nfsd4_encode_user(xdr, rqstp, ace->who_uid);
2248 }
2249
2250 static inline __be32
2251 nfsd4_encode_layout_types(struct xdr_stream *xdr, u32 layout_types)
2252 {
2253 __be32 *p;
2254 unsigned long i = hweight_long(layout_types);
2255
2256 p = xdr_reserve_space(xdr, 4 + 4 * i);
2257 if (!p)
2258 return nfserr_resource;
2259
2260 *p++ = cpu_to_be32(i);
2261
2262 for (i = LAYOUT_NFSV4_1_FILES; i < LAYOUT_TYPE_MAX; ++i)
2263 if (layout_types & (1 << i))
2264 *p++ = cpu_to_be32(i);
2265
2266 return 0;
2267 }
2268
2269 #define WORD0_ABSENT_FS_ATTRS (FATTR4_WORD0_FS_LOCATIONS | FATTR4_WORD0_FSID | \
2270 FATTR4_WORD0_RDATTR_ERROR)
2271 #define WORD1_ABSENT_FS_ATTRS FATTR4_WORD1_MOUNTED_ON_FILEID
2272 #define WORD2_ABSENT_FS_ATTRS 0
2273
2274 #ifdef CONFIG_NFSD_V4_SECURITY_LABEL
2275 static inline __be32
2276 nfsd4_encode_security_label(struct xdr_stream *xdr, struct svc_rqst *rqstp,
2277 void *context, int len)
2278 {
2279 __be32 *p;
2280
2281 p = xdr_reserve_space(xdr, len + 4 + 4 + 4);
2282 if (!p)
2283 return nfserr_resource;
2284
2285 /*
2286 * For now we use a 0 here to indicate the null translation; in
2287 * the future we may place a call to translation code here.
2288 */
2289 *p++ = cpu_to_be32(0); /* lfs */
2290 *p++ = cpu_to_be32(0); /* pi */
2291 p = xdr_encode_opaque(p, context, len);
2292 return 0;
2293 }
2294 #else
2295 static inline __be32
2296 nfsd4_encode_security_label(struct xdr_stream *xdr, struct svc_rqst *rqstp,
2297 void *context, int len)
2298 { return 0; }
2299 #endif
2300
2301 static __be32 fattr_handle_absent_fs(u32 *bmval0, u32 *bmval1, u32 *bmval2, u32 *rdattr_err)
2302 {
2303 /* As per referral draft: */
2304 if (*bmval0 & ~WORD0_ABSENT_FS_ATTRS ||
2305 *bmval1 & ~WORD1_ABSENT_FS_ATTRS) {
2306 if (*bmval0 & FATTR4_WORD0_RDATTR_ERROR ||
2307 *bmval0 & FATTR4_WORD0_FS_LOCATIONS)
2308 *rdattr_err = NFSERR_MOVED;
2309 else
2310 return nfserr_moved;
2311 }
2312 *bmval0 &= WORD0_ABSENT_FS_ATTRS;
2313 *bmval1 &= WORD1_ABSENT_FS_ATTRS;
2314 *bmval2 &= WORD2_ABSENT_FS_ATTRS;
2315 return 0;
2316 }
2317
2318
2319 static int get_parent_attributes(struct svc_export *exp, struct kstat *stat)
2320 {
2321 struct path path = exp->ex_path;
2322 int err;
2323
2324 path_get(&path);
2325 while (follow_up(&path)) {
2326 if (path.dentry != path.mnt->mnt_root)
2327 break;
2328 }
2329 err = vfs_getattr(&path, stat, STATX_BASIC_STATS, AT_STATX_SYNC_AS_STAT);
2330 path_put(&path);
2331 return err;
2332 }
2333
2334 static __be32
2335 nfsd4_encode_bitmap(struct xdr_stream *xdr, u32 bmval0, u32 bmval1, u32 bmval2)
2336 {
2337 __be32 *p;
2338
2339 if (bmval2) {
2340 p = xdr_reserve_space(xdr, 16);
2341 if (!p)
2342 goto out_resource;
2343 *p++ = cpu_to_be32(3);
2344 *p++ = cpu_to_be32(bmval0);
2345 *p++ = cpu_to_be32(bmval1);
2346 *p++ = cpu_to_be32(bmval2);
2347 } else if (bmval1) {
2348 p = xdr_reserve_space(xdr, 12);
2349 if (!p)
2350 goto out_resource;
2351 *p++ = cpu_to_be32(2);
2352 *p++ = cpu_to_be32(bmval0);
2353 *p++ = cpu_to_be32(bmval1);
2354 } else {
2355 p = xdr_reserve_space(xdr, 8);
2356 if (!p)
2357 goto out_resource;
2358 *p++ = cpu_to_be32(1);
2359 *p++ = cpu_to_be32(bmval0);
2360 }
2361
2362 return 0;
2363 out_resource:
2364 return nfserr_resource;
2365 }
2366
2367 /*
2368 * Note: @fhp can be NULL; in this case, we might have to compose the filehandle
2369 * ourselves.
2370 */
2371 static __be32
2372 nfsd4_encode_fattr(struct xdr_stream *xdr, struct svc_fh *fhp,
2373 struct svc_export *exp,
2374 struct dentry *dentry, u32 *bmval,
2375 struct svc_rqst *rqstp, int ignore_crossmnt)
2376 {
2377 u32 bmval0 = bmval[0];
2378 u32 bmval1 = bmval[1];
2379 u32 bmval2 = bmval[2];
2380 struct kstat stat;
2381 struct svc_fh *tempfh = NULL;
2382 struct kstatfs statfs;
2383 __be32 *p;
2384 int starting_len = xdr->buf->len;
2385 int attrlen_offset;
2386 __be32 attrlen;
2387 u32 dummy;
2388 u64 dummy64;
2389 u32 rdattr_err = 0;
2390 __be32 status;
2391 int err;
2392 struct nfs4_acl *acl = NULL;
2393 void *context = NULL;
2394 int contextlen;
2395 bool contextsupport = false;
2396 struct nfsd4_compoundres *resp = rqstp->rq_resp;
2397 u32 minorversion = resp->cstate.minorversion;
2398 struct path path = {
2399 .mnt = exp->ex_path.mnt,
2400 .dentry = dentry,
2401 };
2402 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
2403
2404 BUG_ON(bmval1 & NFSD_WRITEONLY_ATTRS_WORD1);
2405 BUG_ON(!nfsd_attrs_supported(minorversion, bmval));
2406
2407 if (exp->ex_fslocs.migrated) {
2408 status = fattr_handle_absent_fs(&bmval0, &bmval1, &bmval2, &rdattr_err);
2409 if (status)
2410 goto out;
2411 }
2412
2413 err = vfs_getattr(&path, &stat, STATX_BASIC_STATS, AT_STATX_SYNC_AS_STAT);
2414 if (err)
2415 goto out_nfserr;
2416 if ((bmval0 & (FATTR4_WORD0_FILES_AVAIL | FATTR4_WORD0_FILES_FREE |
2417 FATTR4_WORD0_FILES_TOTAL | FATTR4_WORD0_MAXNAME)) ||
2418 (bmval1 & (FATTR4_WORD1_SPACE_AVAIL | FATTR4_WORD1_SPACE_FREE |
2419 FATTR4_WORD1_SPACE_TOTAL))) {
2420 err = vfs_statfs(&path, &statfs);
2421 if (err)
2422 goto out_nfserr;
2423 }
2424 if ((bmval0 & (FATTR4_WORD0_FILEHANDLE | FATTR4_WORD0_FSID)) && !fhp) {
2425 tempfh = kmalloc(sizeof(struct svc_fh), GFP_KERNEL);
2426 status = nfserr_jukebox;
2427 if (!tempfh)
2428 goto out;
2429 fh_init(tempfh, NFS4_FHSIZE);
2430 status = fh_compose(tempfh, exp, dentry, NULL);
2431 if (status)
2432 goto out;
2433 fhp = tempfh;
2434 }
2435 if (bmval0 & FATTR4_WORD0_ACL) {
2436 err = nfsd4_get_nfs4_acl(rqstp, dentry, &acl);
2437 if (err == -EOPNOTSUPP)
2438 bmval0 &= ~FATTR4_WORD0_ACL;
2439 else if (err == -EINVAL) {
2440 status = nfserr_attrnotsupp;
2441 goto out;
2442 } else if (err != 0)
2443 goto out_nfserr;
2444 }
2445
2446 #ifdef CONFIG_NFSD_V4_SECURITY_LABEL
2447 if ((bmval2 & FATTR4_WORD2_SECURITY_LABEL) ||
2448 bmval0 & FATTR4_WORD0_SUPPORTED_ATTRS) {
2449 if (exp->ex_flags & NFSEXP_SECURITY_LABEL)
2450 err = security_inode_getsecctx(d_inode(dentry),
2451 &context, &contextlen);
2452 else
2453 err = -EOPNOTSUPP;
2454 contextsupport = (err == 0);
2455 if (bmval2 & FATTR4_WORD2_SECURITY_LABEL) {
2456 if (err == -EOPNOTSUPP)
2457 bmval2 &= ~FATTR4_WORD2_SECURITY_LABEL;
2458 else if (err)
2459 goto out_nfserr;
2460 }
2461 }
2462 #endif /* CONFIG_NFSD_V4_SECURITY_LABEL */
2463
2464 status = nfsd4_encode_bitmap(xdr, bmval0, bmval1, bmval2);
2465 if (status)
2466 goto out;
2467
2468 attrlen_offset = xdr->buf->len;
2469 p = xdr_reserve_space(xdr, 4);
2470 if (!p)
2471 goto out_resource;
2472 p++; /* to be backfilled later */
2473
2474 if (bmval0 & FATTR4_WORD0_SUPPORTED_ATTRS) {
2475 u32 supp[3];
2476
2477 memcpy(supp, nfsd_suppattrs[minorversion], sizeof(supp));
2478
2479 if (!IS_POSIXACL(dentry->d_inode))
2480 supp[0] &= ~FATTR4_WORD0_ACL;
2481 if (!contextsupport)
2482 supp[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
2483 if (!supp[2]) {
2484 p = xdr_reserve_space(xdr, 12);
2485 if (!p)
2486 goto out_resource;
2487 *p++ = cpu_to_be32(2);
2488 *p++ = cpu_to_be32(supp[0]);
2489 *p++ = cpu_to_be32(supp[1]);
2490 } else {
2491 p = xdr_reserve_space(xdr, 16);
2492 if (!p)
2493 goto out_resource;
2494 *p++ = cpu_to_be32(3);
2495 *p++ = cpu_to_be32(supp[0]);
2496 *p++ = cpu_to_be32(supp[1]);
2497 *p++ = cpu_to_be32(supp[2]);
2498 }
2499 }
2500 if (bmval0 & FATTR4_WORD0_TYPE) {
2501 p = xdr_reserve_space(xdr, 4);
2502 if (!p)
2503 goto out_resource;
2504 dummy = nfs4_file_type(stat.mode);
2505 if (dummy == NF4BAD) {
2506 status = nfserr_serverfault;
2507 goto out;
2508 }
2509 *p++ = cpu_to_be32(dummy);
2510 }
2511 if (bmval0 & FATTR4_WORD0_FH_EXPIRE_TYPE) {
2512 p = xdr_reserve_space(xdr, 4);
2513 if (!p)
2514 goto out_resource;
2515 if (exp->ex_flags & NFSEXP_NOSUBTREECHECK)
2516 *p++ = cpu_to_be32(NFS4_FH_PERSISTENT);
2517 else
2518 *p++ = cpu_to_be32(NFS4_FH_PERSISTENT|
2519 NFS4_FH_VOL_RENAME);
2520 }
2521 if (bmval0 & FATTR4_WORD0_CHANGE) {
2522 p = xdr_reserve_space(xdr, 8);
2523 if (!p)
2524 goto out_resource;
2525 p = encode_change(p, &stat, d_inode(dentry), exp);
2526 }
2527 if (bmval0 & FATTR4_WORD0_SIZE) {
2528 p = xdr_reserve_space(xdr, 8);
2529 if (!p)
2530 goto out_resource;
2531 p = xdr_encode_hyper(p, stat.size);
2532 }
2533 if (bmval0 & FATTR4_WORD0_LINK_SUPPORT) {
2534 p = xdr_reserve_space(xdr, 4);
2535 if (!p)
2536 goto out_resource;
2537 *p++ = cpu_to_be32(1);
2538 }
2539 if (bmval0 & FATTR4_WORD0_SYMLINK_SUPPORT) {
2540 p = xdr_reserve_space(xdr, 4);
2541 if (!p)
2542 goto out_resource;
2543 *p++ = cpu_to_be32(1);
2544 }
2545 if (bmval0 & FATTR4_WORD0_NAMED_ATTR) {
2546 p = xdr_reserve_space(xdr, 4);
2547 if (!p)
2548 goto out_resource;
2549 *p++ = cpu_to_be32(0);
2550 }
2551 if (bmval0 & FATTR4_WORD0_FSID) {
2552 p = xdr_reserve_space(xdr, 16);
2553 if (!p)
2554 goto out_resource;
2555 if (exp->ex_fslocs.migrated) {
2556 p = xdr_encode_hyper(p, NFS4_REFERRAL_FSID_MAJOR);
2557 p = xdr_encode_hyper(p, NFS4_REFERRAL_FSID_MINOR);
2558 } else switch(fsid_source(fhp)) {
2559 case FSIDSOURCE_FSID:
2560 p = xdr_encode_hyper(p, (u64)exp->ex_fsid);
2561 p = xdr_encode_hyper(p, (u64)0);
2562 break;
2563 case FSIDSOURCE_DEV:
2564 *p++ = cpu_to_be32(0);
2565 *p++ = cpu_to_be32(MAJOR(stat.dev));
2566 *p++ = cpu_to_be32(0);
2567 *p++ = cpu_to_be32(MINOR(stat.dev));
2568 break;
2569 case FSIDSOURCE_UUID:
2570 p = xdr_encode_opaque_fixed(p, exp->ex_uuid,
2571 EX_UUID_LEN);
2572 break;
2573 }
2574 }
2575 if (bmval0 & FATTR4_WORD0_UNIQUE_HANDLES) {
2576 p = xdr_reserve_space(xdr, 4);
2577 if (!p)
2578 goto out_resource;
2579 *p++ = cpu_to_be32(0);
2580 }
2581 if (bmval0 & FATTR4_WORD0_LEASE_TIME) {
2582 p = xdr_reserve_space(xdr, 4);
2583 if (!p)
2584 goto out_resource;
2585 *p++ = cpu_to_be32(nn->nfsd4_lease);
2586 }
2587 if (bmval0 & FATTR4_WORD0_RDATTR_ERROR) {
2588 p = xdr_reserve_space(xdr, 4);
2589 if (!p)
2590 goto out_resource;
2591 *p++ = cpu_to_be32(rdattr_err);
2592 }
2593 if (bmval0 & FATTR4_WORD0_ACL) {
2594 struct nfs4_ace *ace;
2595
2596 if (acl == NULL) {
2597 p = xdr_reserve_space(xdr, 4);
2598 if (!p)
2599 goto out_resource;
2600
2601 *p++ = cpu_to_be32(0);
2602 goto out_acl;
2603 }
2604 p = xdr_reserve_space(xdr, 4);
2605 if (!p)
2606 goto out_resource;
2607 *p++ = cpu_to_be32(acl->naces);
2608
2609 for (ace = acl->aces; ace < acl->aces + acl->naces; ace++) {
2610 p = xdr_reserve_space(xdr, 4*3);
2611 if (!p)
2612 goto out_resource;
2613 *p++ = cpu_to_be32(ace->type);
2614 *p++ = cpu_to_be32(ace->flag);
2615 *p++ = cpu_to_be32(ace->access_mask &
2616 NFS4_ACE_MASK_ALL);
2617 status = nfsd4_encode_aclname(xdr, rqstp, ace);
2618 if (status)
2619 goto out;
2620 }
2621 }
2622 out_acl:
2623 if (bmval0 & FATTR4_WORD0_ACLSUPPORT) {
2624 p = xdr_reserve_space(xdr, 4);
2625 if (!p)
2626 goto out_resource;
2627 *p++ = cpu_to_be32(IS_POSIXACL(dentry->d_inode) ?
2628 ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL : 0);
2629 }
2630 if (bmval0 & FATTR4_WORD0_CANSETTIME) {
2631 p = xdr_reserve_space(xdr, 4);
2632 if (!p)
2633 goto out_resource;
2634 *p++ = cpu_to_be32(1);
2635 }
2636 if (bmval0 & FATTR4_WORD0_CASE_INSENSITIVE) {
2637 p = xdr_reserve_space(xdr, 4);
2638 if (!p)
2639 goto out_resource;
2640 *p++ = cpu_to_be32(0);
2641 }
2642 if (bmval0 & FATTR4_WORD0_CASE_PRESERVING) {
2643 p = xdr_reserve_space(xdr, 4);
2644 if (!p)
2645 goto out_resource;
2646 *p++ = cpu_to_be32(1);
2647 }
2648 if (bmval0 & FATTR4_WORD0_CHOWN_RESTRICTED) {
2649 p = xdr_reserve_space(xdr, 4);
2650 if (!p)
2651 goto out_resource;
2652 *p++ = cpu_to_be32(1);
2653 }
2654 if (bmval0 & FATTR4_WORD0_FILEHANDLE) {
2655 p = xdr_reserve_space(xdr, fhp->fh_handle.fh_size + 4);
2656 if (!p)
2657 goto out_resource;
2658 p = xdr_encode_opaque(p, &fhp->fh_handle.fh_base,
2659 fhp->fh_handle.fh_size);
2660 }
2661 if (bmval0 & FATTR4_WORD0_FILEID) {
2662 p = xdr_reserve_space(xdr, 8);
2663 if (!p)
2664 goto out_resource;
2665 p = xdr_encode_hyper(p, stat.ino);
2666 }
2667 if (bmval0 & FATTR4_WORD0_FILES_AVAIL) {
2668 p = xdr_reserve_space(xdr, 8);
2669 if (!p)
2670 goto out_resource;
2671 p = xdr_encode_hyper(p, (u64) statfs.f_ffree);
2672 }
2673 if (bmval0 & FATTR4_WORD0_FILES_FREE) {
2674 p = xdr_reserve_space(xdr, 8);
2675 if (!p)
2676 goto out_resource;
2677 p = xdr_encode_hyper(p, (u64) statfs.f_ffree);
2678 }
2679 if (bmval0 & FATTR4_WORD0_FILES_TOTAL) {
2680 p = xdr_reserve_space(xdr, 8);
2681 if (!p)
2682 goto out_resource;
2683 p = xdr_encode_hyper(p, (u64) statfs.f_files);
2684 }
2685 if (bmval0 & FATTR4_WORD0_FS_LOCATIONS) {
2686 status = nfsd4_encode_fs_locations(xdr, rqstp, exp);
2687 if (status)
2688 goto out;
2689 }
2690 if (bmval0 & FATTR4_WORD0_HOMOGENEOUS) {
2691 p = xdr_reserve_space(xdr, 4);
2692 if (!p)
2693 goto out_resource;
2694 *p++ = cpu_to_be32(1);
2695 }
2696 if (bmval0 & FATTR4_WORD0_MAXFILESIZE) {
2697 p = xdr_reserve_space(xdr, 8);
2698 if (!p)
2699 goto out_resource;
2700 p = xdr_encode_hyper(p, exp->ex_path.mnt->mnt_sb->s_maxbytes);
2701 }
2702 if (bmval0 & FATTR4_WORD0_MAXLINK) {
2703 p = xdr_reserve_space(xdr, 4);
2704 if (!p)
2705 goto out_resource;
2706 *p++ = cpu_to_be32(255);
2707 }
2708 if (bmval0 & FATTR4_WORD0_MAXNAME) {
2709 p = xdr_reserve_space(xdr, 4);
2710 if (!p)
2711 goto out_resource;
2712 *p++ = cpu_to_be32(statfs.f_namelen);
2713 }
2714 if (bmval0 & FATTR4_WORD0_MAXREAD) {
2715 p = xdr_reserve_space(xdr, 8);
2716 if (!p)
2717 goto out_resource;
2718 p = xdr_encode_hyper(p, (u64) svc_max_payload(rqstp));
2719 }
2720 if (bmval0 & FATTR4_WORD0_MAXWRITE) {
2721 p = xdr_reserve_space(xdr, 8);
2722 if (!p)
2723 goto out_resource;
2724 p = xdr_encode_hyper(p, (u64) svc_max_payload(rqstp));
2725 }
2726 if (bmval1 & FATTR4_WORD1_MODE) {
2727 p = xdr_reserve_space(xdr, 4);
2728 if (!p)
2729 goto out_resource;
2730 *p++ = cpu_to_be32(stat.mode & S_IALLUGO);
2731 }
2732 if (bmval1 & FATTR4_WORD1_NO_TRUNC) {
2733 p = xdr_reserve_space(xdr, 4);
2734 if (!p)
2735 goto out_resource;
2736 *p++ = cpu_to_be32(1);
2737 }
2738 if (bmval1 & FATTR4_WORD1_NUMLINKS) {
2739 p = xdr_reserve_space(xdr, 4);
2740 if (!p)
2741 goto out_resource;
2742 *p++ = cpu_to_be32(stat.nlink);
2743 }
2744 if (bmval1 & FATTR4_WORD1_OWNER) {
2745 status = nfsd4_encode_user(xdr, rqstp, stat.uid);
2746 if (status)
2747 goto out;
2748 }
2749 if (bmval1 & FATTR4_WORD1_OWNER_GROUP) {
2750 status = nfsd4_encode_group(xdr, rqstp, stat.gid);
2751 if (status)
2752 goto out;
2753 }
2754 if (bmval1 & FATTR4_WORD1_RAWDEV) {
2755 p = xdr_reserve_space(xdr, 8);
2756 if (!p)
2757 goto out_resource;
2758 *p++ = cpu_to_be32((u32) MAJOR(stat.rdev));
2759 *p++ = cpu_to_be32((u32) MINOR(stat.rdev));
2760 }
2761 if (bmval1 & FATTR4_WORD1_SPACE_AVAIL) {
2762 p = xdr_reserve_space(xdr, 8);
2763 if (!p)
2764 goto out_resource;
2765 dummy64 = (u64)statfs.f_bavail * (u64)statfs.f_bsize;
2766 p = xdr_encode_hyper(p, dummy64);
2767 }
2768 if (bmval1 & FATTR4_WORD1_SPACE_FREE) {
2769 p = xdr_reserve_space(xdr, 8);
2770 if (!p)
2771 goto out_resource;
2772 dummy64 = (u64)statfs.f_bfree * (u64)statfs.f_bsize;
2773 p = xdr_encode_hyper(p, dummy64);
2774 }
2775 if (bmval1 & FATTR4_WORD1_SPACE_TOTAL) {
2776 p = xdr_reserve_space(xdr, 8);
2777 if (!p)
2778 goto out_resource;
2779 dummy64 = (u64)statfs.f_blocks * (u64)statfs.f_bsize;
2780 p = xdr_encode_hyper(p, dummy64);
2781 }
2782 if (bmval1 & FATTR4_WORD1_SPACE_USED) {
2783 p = xdr_reserve_space(xdr, 8);
2784 if (!p)
2785 goto out_resource;
2786 dummy64 = (u64)stat.blocks << 9;
2787 p = xdr_encode_hyper(p, dummy64);
2788 }
2789 if (bmval1 & FATTR4_WORD1_TIME_ACCESS) {
2790 p = xdr_reserve_space(xdr, 12);
2791 if (!p)
2792 goto out_resource;
2793 p = xdr_encode_hyper(p, (s64)stat.atime.tv_sec);
2794 *p++ = cpu_to_be32(stat.atime.tv_nsec);
2795 }
2796 if (bmval1 & FATTR4_WORD1_TIME_DELTA) {
2797 p = xdr_reserve_space(xdr, 12);
2798 if (!p)
2799 goto out_resource;
2800 *p++ = cpu_to_be32(0);
2801 *p++ = cpu_to_be32(1);
2802 *p++ = cpu_to_be32(0);
2803 }
2804 if (bmval1 & FATTR4_WORD1_TIME_METADATA) {
2805 p = xdr_reserve_space(xdr, 12);
2806 if (!p)
2807 goto out_resource;
2808 p = xdr_encode_hyper(p, (s64)stat.ctime.tv_sec);
2809 *p++ = cpu_to_be32(stat.ctime.tv_nsec);
2810 }
2811 if (bmval1 & FATTR4_WORD1_TIME_MODIFY) {
2812 p = xdr_reserve_space(xdr, 12);
2813 if (!p)
2814 goto out_resource;
2815 p = xdr_encode_hyper(p, (s64)stat.mtime.tv_sec);
2816 *p++ = cpu_to_be32(stat.mtime.tv_nsec);
2817 }
2818 if (bmval1 & FATTR4_WORD1_MOUNTED_ON_FILEID) {
2819 struct kstat parent_stat;
2820 u64 ino = stat.ino;
2821
2822 p = xdr_reserve_space(xdr, 8);
2823 if (!p)
2824 goto out_resource;
2825 /*
2826 * Get parent's attributes if not ignoring crossmount
2827 * and this is the root of a cross-mounted filesystem.
2828 */
2829 if (ignore_crossmnt == 0 &&
2830 dentry == exp->ex_path.mnt->mnt_root) {
2831 err = get_parent_attributes(exp, &parent_stat);
2832 if (err)
2833 goto out_nfserr;
2834 ino = parent_stat.ino;
2835 }
2836 p = xdr_encode_hyper(p, ino);
2837 }
2838 #ifdef CONFIG_NFSD_PNFS
2839 if (bmval1 & FATTR4_WORD1_FS_LAYOUT_TYPES) {
2840 status = nfsd4_encode_layout_types(xdr, exp->ex_layout_types);
2841 if (status)
2842 goto out;
2843 }
2844
2845 if (bmval2 & FATTR4_WORD2_LAYOUT_TYPES) {
2846 status = nfsd4_encode_layout_types(xdr, exp->ex_layout_types);
2847 if (status)
2848 goto out;
2849 }
2850
2851 if (bmval2 & FATTR4_WORD2_LAYOUT_BLKSIZE) {
2852 p = xdr_reserve_space(xdr, 4);
2853 if (!p)
2854 goto out_resource;
2855 *p++ = cpu_to_be32(stat.blksize);
2856 }
2857 #endif /* CONFIG_NFSD_PNFS */
2858 if (bmval2 & FATTR4_WORD2_SUPPATTR_EXCLCREAT) {
2859 u32 supp[3];
2860
2861 memcpy(supp, nfsd_suppattrs[minorversion], sizeof(supp));
2862 supp[0] &= NFSD_SUPPATTR_EXCLCREAT_WORD0;
2863 supp[1] &= NFSD_SUPPATTR_EXCLCREAT_WORD1;
2864 supp[2] &= NFSD_SUPPATTR_EXCLCREAT_WORD2;
2865
2866 status = nfsd4_encode_bitmap(xdr, supp[0], supp[1], supp[2]);
2867 if (status)
2868 goto out;
2869 }
2870
2871 if (bmval2 & FATTR4_WORD2_SECURITY_LABEL) {
2872 status = nfsd4_encode_security_label(xdr, rqstp, context,
2873 contextlen);
2874 if (status)
2875 goto out;
2876 }
2877
2878 attrlen = htonl(xdr->buf->len - attrlen_offset - 4);
2879 write_bytes_to_xdr_buf(xdr->buf, attrlen_offset, &attrlen, 4);
2880 status = nfs_ok;
2881
2882 out:
2883 #ifdef CONFIG_NFSD_V4_SECURITY_LABEL
2884 if (context)
2885 security_release_secctx(context, contextlen);
2886 #endif /* CONFIG_NFSD_V4_SECURITY_LABEL */
2887 kfree(acl);
2888 if (tempfh) {
2889 fh_put(tempfh);
2890 kfree(tempfh);
2891 }
2892 if (status)
2893 xdr_truncate_encode(xdr, starting_len);
2894 return status;
2895 out_nfserr:
2896 status = nfserrno(err);
2897 goto out;
2898 out_resource:
2899 status = nfserr_resource;
2900 goto out;
2901 }
2902
2903 static void svcxdr_init_encode_from_buffer(struct xdr_stream *xdr,
2904 struct xdr_buf *buf, __be32 *p, int bytes)
2905 {
2906 xdr->scratch.iov_len = 0;
2907 memset(buf, 0, sizeof(struct xdr_buf));
2908 buf->head[0].iov_base = p;
2909 buf->head[0].iov_len = 0;
2910 buf->len = 0;
2911 xdr->buf = buf;
2912 xdr->iov = buf->head;
2913 xdr->p = p;
2914 xdr->end = (void *)p + bytes;
2915 buf->buflen = bytes;
2916 }
2917
2918 __be32 nfsd4_encode_fattr_to_buf(__be32 **p, int words,
2919 struct svc_fh *fhp, struct svc_export *exp,
2920 struct dentry *dentry, u32 *bmval,
2921 struct svc_rqst *rqstp, int ignore_crossmnt)
2922 {
2923 struct xdr_buf dummy;
2924 struct xdr_stream xdr;
2925 __be32 ret;
2926
2927 svcxdr_init_encode_from_buffer(&xdr, &dummy, *p, words << 2);
2928 ret = nfsd4_encode_fattr(&xdr, fhp, exp, dentry, bmval, rqstp,
2929 ignore_crossmnt);
2930 *p = xdr.p;
2931 return ret;
2932 }
2933
2934 static inline int attributes_need_mount(u32 *bmval)
2935 {
2936 if (bmval[0] & ~(FATTR4_WORD0_RDATTR_ERROR | FATTR4_WORD0_LEASE_TIME))
2937 return 1;
2938 if (bmval[1] & ~FATTR4_WORD1_MOUNTED_ON_FILEID)
2939 return 1;
2940 return 0;
2941 }
2942
2943 static __be32
2944 nfsd4_encode_dirent_fattr(struct xdr_stream *xdr, struct nfsd4_readdir *cd,
2945 const char *name, int namlen)
2946 {
2947 struct svc_export *exp = cd->rd_fhp->fh_export;
2948 struct dentry *dentry;
2949 __be32 nfserr;
2950 int ignore_crossmnt = 0;
2951
2952 dentry = lookup_one_len_unlocked(name, cd->rd_fhp->fh_dentry, namlen);
2953 if (IS_ERR(dentry))
2954 return nfserrno(PTR_ERR(dentry));
2955 if (d_really_is_negative(dentry)) {
2956 /*
2957 * we're not holding the i_mutex here, so there's
2958 * a window where this directory entry could have gone
2959 * away.
2960 */
2961 dput(dentry);
2962 return nfserr_noent;
2963 }
2964
2965 exp_get(exp);
2966 /*
2967 * In the case of a mountpoint, the client may be asking for
2968 * attributes that are only properties of the underlying filesystem
2969 * as opposed to the cross-mounted file system. In such a case,
2970 * we will not follow the cross mount and will fill the attribtutes
2971 * directly from the mountpoint dentry.
2972 */
2973 if (nfsd_mountpoint(dentry, exp)) {
2974 int err;
2975
2976 if (!(exp->ex_flags & NFSEXP_V4ROOT)
2977 && !attributes_need_mount(cd->rd_bmval)) {
2978 ignore_crossmnt = 1;
2979 goto out_encode;
2980 }
2981 /*
2982 * Why the heck aren't we just using nfsd_lookup??
2983 * Different "."/".." handling? Something else?
2984 * At least, add a comment here to explain....
2985 */
2986 err = nfsd_cross_mnt(cd->rd_rqstp, &dentry, &exp);
2987 if (err) {
2988 nfserr = nfserrno(err);
2989 goto out_put;
2990 }
2991 nfserr = check_nfsd_access(exp, cd->rd_rqstp);
2992 if (nfserr)
2993 goto out_put;
2994
2995 }
2996 out_encode:
2997 nfserr = nfsd4_encode_fattr(xdr, NULL, exp, dentry, cd->rd_bmval,
2998 cd->rd_rqstp, ignore_crossmnt);
2999 out_put:
3000 dput(dentry);
3001 exp_put(exp);
3002 return nfserr;
3003 }
3004
3005 static __be32 *
3006 nfsd4_encode_rdattr_error(struct xdr_stream *xdr, __be32 nfserr)
3007 {
3008 __be32 *p;
3009
3010 p = xdr_reserve_space(xdr, 20);
3011 if (!p)
3012 return NULL;
3013 *p++ = htonl(2);
3014 *p++ = htonl(FATTR4_WORD0_RDATTR_ERROR); /* bmval0 */
3015 *p++ = htonl(0); /* bmval1 */
3016
3017 *p++ = htonl(4); /* attribute length */
3018 *p++ = nfserr; /* no htonl */
3019 return p;
3020 }
3021
3022 static int
3023 nfsd4_encode_dirent(void *ccdv, const char *name, int namlen,
3024 loff_t offset, u64 ino, unsigned int d_type)
3025 {
3026 struct readdir_cd *ccd = ccdv;
3027 struct nfsd4_readdir *cd = container_of(ccd, struct nfsd4_readdir, common);
3028 struct xdr_stream *xdr = cd->xdr;
3029 int start_offset = xdr->buf->len;
3030 int cookie_offset;
3031 u32 name_and_cookie;
3032 int entry_bytes;
3033 __be32 nfserr = nfserr_toosmall;
3034 __be64 wire_offset;
3035 __be32 *p;
3036
3037 /* In nfsv4, "." and ".." never make it onto the wire.. */
3038 if (name && isdotent(name, namlen)) {
3039 cd->common.err = nfs_ok;
3040 return 0;
3041 }
3042
3043 if (cd->cookie_offset) {
3044 wire_offset = cpu_to_be64(offset);
3045 write_bytes_to_xdr_buf(xdr->buf, cd->cookie_offset,
3046 &wire_offset, 8);
3047 }
3048
3049 p = xdr_reserve_space(xdr, 4);
3050 if (!p)
3051 goto fail;
3052 *p++ = xdr_one; /* mark entry present */
3053 cookie_offset = xdr->buf->len;
3054 p = xdr_reserve_space(xdr, 3*4 + namlen);
3055 if (!p)
3056 goto fail;
3057 p = xdr_encode_hyper(p, NFS_OFFSET_MAX); /* offset of next entry */
3058 p = xdr_encode_array(p, name, namlen); /* name length & name */
3059
3060 nfserr = nfsd4_encode_dirent_fattr(xdr, cd, name, namlen);
3061 switch (nfserr) {
3062 case nfs_ok:
3063 break;
3064 case nfserr_resource:
3065 nfserr = nfserr_toosmall;
3066 goto fail;
3067 case nfserr_noent:
3068 xdr_truncate_encode(xdr, start_offset);
3069 goto skip_entry;
3070 default:
3071 /*
3072 * If the client requested the RDATTR_ERROR attribute,
3073 * we stuff the error code into this attribute
3074 * and continue. If this attribute was not requested,
3075 * then in accordance with the spec, we fail the
3076 * entire READDIR operation(!)
3077 */
3078 if (!(cd->rd_bmval[0] & FATTR4_WORD0_RDATTR_ERROR))
3079 goto fail;
3080 p = nfsd4_encode_rdattr_error(xdr, nfserr);
3081 if (p == NULL) {
3082 nfserr = nfserr_toosmall;
3083 goto fail;
3084 }
3085 }
3086 nfserr = nfserr_toosmall;
3087 entry_bytes = xdr->buf->len - start_offset;
3088 if (entry_bytes > cd->rd_maxcount)
3089 goto fail;
3090 cd->rd_maxcount -= entry_bytes;
3091 /*
3092 * RFC 3530 14.2.24 describes rd_dircount as only a "hint", so
3093 * let's always let through the first entry, at least:
3094 */
3095 if (!cd->rd_dircount)
3096 goto fail;
3097 name_and_cookie = 4 + 4 * XDR_QUADLEN(namlen) + 8;
3098 if (name_and_cookie > cd->rd_dircount && cd->cookie_offset)
3099 goto fail;
3100 cd->rd_dircount -= min(cd->rd_dircount, name_and_cookie);
3101
3102 cd->cookie_offset = cookie_offset;
3103 skip_entry:
3104 cd->common.err = nfs_ok;
3105 return 0;
3106 fail:
3107 xdr_truncate_encode(xdr, start_offset);
3108 cd->common.err = nfserr;
3109 return -EINVAL;
3110 }
3111
3112 static __be32
3113 nfsd4_encode_stateid(struct xdr_stream *xdr, stateid_t *sid)
3114 {
3115 __be32 *p;
3116
3117 p = xdr_reserve_space(xdr, sizeof(stateid_t));
3118 if (!p)
3119 return nfserr_resource;
3120 *p++ = cpu_to_be32(sid->si_generation);
3121 p = xdr_encode_opaque_fixed(p, &sid->si_opaque,
3122 sizeof(stateid_opaque_t));
3123 return 0;
3124 }
3125
3126 static __be32
3127 nfsd4_encode_access(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_access *access)
3128 {
3129 struct xdr_stream *xdr = &resp->xdr;
3130 __be32 *p;
3131
3132 p = xdr_reserve_space(xdr, 8);
3133 if (!p)
3134 return nfserr_resource;
3135 *p++ = cpu_to_be32(access->ac_supported);
3136 *p++ = cpu_to_be32(access->ac_resp_access);
3137 return 0;
3138 }
3139
3140 static __be32 nfsd4_encode_bind_conn_to_session(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_bind_conn_to_session *bcts)
3141 {
3142 struct xdr_stream *xdr = &resp->xdr;
3143 __be32 *p;
3144
3145 p = xdr_reserve_space(xdr, NFS4_MAX_SESSIONID_LEN + 8);
3146 if (!p)
3147 return nfserr_resource;
3148 p = xdr_encode_opaque_fixed(p, bcts->sessionid.data,
3149 NFS4_MAX_SESSIONID_LEN);
3150 *p++ = cpu_to_be32(bcts->dir);
3151 /* Upshifting from TCP to RDMA is not supported */
3152 *p++ = cpu_to_be32(0);
3153 return 0;
3154 }
3155
3156 static __be32
3157 nfsd4_encode_close(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_close *close)
3158 {
3159 struct xdr_stream *xdr = &resp->xdr;
3160
3161 return nfsd4_encode_stateid(xdr, &close->cl_stateid);
3162 }
3163
3164
3165 static __be32
3166 nfsd4_encode_commit(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_commit *commit)
3167 {
3168 struct xdr_stream *xdr = &resp->xdr;
3169 __be32 *p;
3170
3171 p = xdr_reserve_space(xdr, NFS4_VERIFIER_SIZE);
3172 if (!p)
3173 return nfserr_resource;
3174 p = xdr_encode_opaque_fixed(p, commit->co_verf.data,
3175 NFS4_VERIFIER_SIZE);
3176 return 0;
3177 }
3178
3179 static __be32
3180 nfsd4_encode_create(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_create *create)
3181 {
3182 struct xdr_stream *xdr = &resp->xdr;
3183 __be32 *p;
3184
3185 p = xdr_reserve_space(xdr, 20);
3186 if (!p)
3187 return nfserr_resource;
3188 encode_cinfo(p, &create->cr_cinfo);
3189 nfserr = nfsd4_encode_bitmap(xdr, create->cr_bmval[0],
3190 create->cr_bmval[1], create->cr_bmval[2]);
3191 return 0;
3192 }
3193
3194 static __be32
3195 nfsd4_encode_getattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_getattr *getattr)
3196 {
3197 struct svc_fh *fhp = getattr->ga_fhp;
3198 struct xdr_stream *xdr = &resp->xdr;
3199
3200 return nfsd4_encode_fattr(xdr, fhp, fhp->fh_export, fhp->fh_dentry,
3201 getattr->ga_bmval, resp->rqstp, 0);
3202 }
3203
3204 static __be32
3205 nfsd4_encode_getfh(struct nfsd4_compoundres *resp, __be32 nfserr, struct svc_fh **fhpp)
3206 {
3207 struct xdr_stream *xdr = &resp->xdr;
3208 struct svc_fh *fhp = *fhpp;
3209 unsigned int len;
3210 __be32 *p;
3211
3212 len = fhp->fh_handle.fh_size;
3213 p = xdr_reserve_space(xdr, len + 4);
3214 if (!p)
3215 return nfserr_resource;
3216 p = xdr_encode_opaque(p, &fhp->fh_handle.fh_base, len);
3217 return 0;
3218 }
3219
3220 /*
3221 * Including all fields other than the name, a LOCK4denied structure requires
3222 * 8(clientid) + 4(namelen) + 8(offset) + 8(length) + 4(type) = 32 bytes.
3223 */
3224 static __be32
3225 nfsd4_encode_lock_denied(struct xdr_stream *xdr, struct nfsd4_lock_denied *ld)
3226 {
3227 struct xdr_netobj *conf = &ld->ld_owner;
3228 __be32 *p;
3229
3230 again:
3231 p = xdr_reserve_space(xdr, 32 + XDR_LEN(conf->len));
3232 if (!p) {
3233 /*
3234 * Don't fail to return the result just because we can't
3235 * return the conflicting open:
3236 */
3237 if (conf->len) {
3238 kfree(conf->data);
3239 conf->len = 0;
3240 conf->data = NULL;
3241 goto again;
3242 }
3243 return nfserr_resource;
3244 }
3245 p = xdr_encode_hyper(p, ld->ld_start);
3246 p = xdr_encode_hyper(p, ld->ld_length);
3247 *p++ = cpu_to_be32(ld->ld_type);
3248 if (conf->len) {
3249 p = xdr_encode_opaque_fixed(p, &ld->ld_clientid, 8);
3250 p = xdr_encode_opaque(p, conf->data, conf->len);
3251 kfree(conf->data);
3252 } else { /* non - nfsv4 lock in conflict, no clientid nor owner */
3253 p = xdr_encode_hyper(p, (u64)0); /* clientid */
3254 *p++ = cpu_to_be32(0); /* length of owner name */
3255 }
3256 return nfserr_denied;
3257 }
3258
3259 static __be32
3260 nfsd4_encode_lock(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lock *lock)
3261 {
3262 struct xdr_stream *xdr = &resp->xdr;
3263
3264 if (!nfserr)
3265 nfserr = nfsd4_encode_stateid(xdr, &lock->lk_resp_stateid);
3266 else if (nfserr == nfserr_denied)
3267 nfserr = nfsd4_encode_lock_denied(xdr, &lock->lk_denied);
3268
3269 return nfserr;
3270 }
3271
3272 static __be32
3273 nfsd4_encode_lockt(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lockt *lockt)
3274 {
3275 struct xdr_stream *xdr = &resp->xdr;
3276
3277 if (nfserr == nfserr_denied)
3278 nfsd4_encode_lock_denied(xdr, &lockt->lt_denied);
3279 return nfserr;
3280 }
3281
3282 static __be32
3283 nfsd4_encode_locku(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_locku *locku)
3284 {
3285 struct xdr_stream *xdr = &resp->xdr;
3286
3287 return nfsd4_encode_stateid(xdr, &locku->lu_stateid);
3288 }
3289
3290
3291 static __be32
3292 nfsd4_encode_link(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_link *link)
3293 {
3294 struct xdr_stream *xdr = &resp->xdr;
3295 __be32 *p;
3296
3297 p = xdr_reserve_space(xdr, 20);
3298 if (!p)
3299 return nfserr_resource;
3300 p = encode_cinfo(p, &link->li_cinfo);
3301 return 0;
3302 }
3303
3304
3305 static __be32
3306 nfsd4_encode_open(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open *open)
3307 {
3308 struct xdr_stream *xdr = &resp->xdr;
3309 __be32 *p;
3310
3311 nfserr = nfsd4_encode_stateid(xdr, &open->op_stateid);
3312 if (nfserr)
3313 return nfserr;
3314 p = xdr_reserve_space(xdr, 24);
3315 if (!p)
3316 return nfserr_resource;
3317 p = encode_cinfo(p, &open->op_cinfo);
3318 *p++ = cpu_to_be32(open->op_rflags);
3319
3320 nfserr = nfsd4_encode_bitmap(xdr, open->op_bmval[0], open->op_bmval[1],
3321 open->op_bmval[2]);
3322 if (nfserr)
3323 return nfserr;
3324
3325 p = xdr_reserve_space(xdr, 4);
3326 if (!p)
3327 return nfserr_resource;
3328
3329 *p++ = cpu_to_be32(open->op_delegate_type);
3330 switch (open->op_delegate_type) {
3331 case NFS4_OPEN_DELEGATE_NONE:
3332 break;
3333 case NFS4_OPEN_DELEGATE_READ:
3334 nfserr = nfsd4_encode_stateid(xdr, &open->op_delegate_stateid);
3335 if (nfserr)
3336 return nfserr;
3337 p = xdr_reserve_space(xdr, 20);
3338 if (!p)
3339 return nfserr_resource;
3340 *p++ = cpu_to_be32(open->op_recall);
3341
3342 /*
3343 * TODO: ACE's in delegations
3344 */
3345 *p++ = cpu_to_be32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
3346 *p++ = cpu_to_be32(0);
3347 *p++ = cpu_to_be32(0);
3348 *p++ = cpu_to_be32(0); /* XXX: is NULL principal ok? */
3349 break;
3350 case NFS4_OPEN_DELEGATE_WRITE:
3351 nfserr = nfsd4_encode_stateid(xdr, &open->op_delegate_stateid);
3352 if (nfserr)
3353 return nfserr;
3354 p = xdr_reserve_space(xdr, 32);
3355 if (!p)
3356 return nfserr_resource;
3357 *p++ = cpu_to_be32(0);
3358
3359 /*
3360 * TODO: space_limit's in delegations
3361 */
3362 *p++ = cpu_to_be32(NFS4_LIMIT_SIZE);
3363 *p++ = cpu_to_be32(~(u32)0);
3364 *p++ = cpu_to_be32(~(u32)0);
3365
3366 /*
3367 * TODO: ACE's in delegations
3368 */
3369 *p++ = cpu_to_be32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
3370 *p++ = cpu_to_be32(0);
3371 *p++ = cpu_to_be32(0);
3372 *p++ = cpu_to_be32(0); /* XXX: is NULL principal ok? */
3373 break;
3374 case NFS4_OPEN_DELEGATE_NONE_EXT: /* 4.1 */
3375 switch (open->op_why_no_deleg) {
3376 case WND4_CONTENTION:
3377 case WND4_RESOURCE:
3378 p = xdr_reserve_space(xdr, 8);
3379 if (!p)
3380 return nfserr_resource;
3381 *p++ = cpu_to_be32(open->op_why_no_deleg);
3382 /* deleg signaling not supported yet: */
3383 *p++ = cpu_to_be32(0);
3384 break;
3385 default:
3386 p = xdr_reserve_space(xdr, 4);
3387 if (!p)
3388 return nfserr_resource;
3389 *p++ = cpu_to_be32(open->op_why_no_deleg);
3390 }
3391 break;
3392 default:
3393 BUG();
3394 }
3395 /* XXX save filehandle here */
3396 return 0;
3397 }
3398
3399 static __be32
3400 nfsd4_encode_open_confirm(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_confirm *oc)
3401 {
3402 struct xdr_stream *xdr = &resp->xdr;
3403
3404 return nfsd4_encode_stateid(xdr, &oc->oc_resp_stateid);
3405 }
3406
3407 static __be32
3408 nfsd4_encode_open_downgrade(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_downgrade *od)
3409 {
3410 struct xdr_stream *xdr = &resp->xdr;
3411
3412 return nfsd4_encode_stateid(xdr, &od->od_stateid);
3413 }
3414
3415 static __be32 nfsd4_encode_splice_read(
3416 struct nfsd4_compoundres *resp,
3417 struct nfsd4_read *read,
3418 struct file *file, unsigned long maxcount)
3419 {
3420 struct xdr_stream *xdr = &resp->xdr;
3421 struct xdr_buf *buf = xdr->buf;
3422 u32 eof;
3423 long len;
3424 int space_left;
3425 __be32 nfserr;
3426 __be32 *p = xdr->p - 2;
3427
3428 /* Make sure there will be room for padding if needed */
3429 if (xdr->end - xdr->p < 1)
3430 return nfserr_resource;
3431
3432 len = maxcount;
3433 nfserr = nfsd_splice_read(read->rd_rqstp, read->rd_fhp,
3434 file, read->rd_offset, &maxcount);
3435 read->rd_length = maxcount;
3436 if (nfserr) {
3437 /*
3438 * nfsd_splice_actor may have already messed with the
3439 * page length; reset it so as not to confuse
3440 * xdr_truncate_encode:
3441 */
3442 buf->page_len = 0;
3443 return nfserr;
3444 }
3445
3446 eof = nfsd_eof_on_read(len, maxcount, read->rd_offset,
3447 d_inode(read->rd_fhp->fh_dentry)->i_size);
3448
3449 *(p++) = htonl(eof);
3450 *(p++) = htonl(maxcount);
3451
3452 buf->page_len = maxcount;
3453 buf->len += maxcount;
3454 xdr->page_ptr += (buf->page_base + maxcount + PAGE_SIZE - 1)
3455 / PAGE_SIZE;
3456
3457 /* Use rest of head for padding and remaining ops: */
3458 buf->tail[0].iov_base = xdr->p;
3459 buf->tail[0].iov_len = 0;
3460 xdr->iov = buf->tail;
3461 if (maxcount&3) {
3462 int pad = 4 - (maxcount&3);
3463
3464 *(xdr->p++) = 0;
3465
3466 buf->tail[0].iov_base += maxcount&3;
3467 buf->tail[0].iov_len = pad;
3468 buf->len += pad;
3469 }
3470
3471 space_left = min_t(int, (void *)xdr->end - (void *)xdr->p,
3472 buf->buflen - buf->len);
3473 buf->buflen = buf->len + space_left;
3474 xdr->end = (__be32 *)((void *)xdr->end + space_left);
3475
3476 return 0;
3477 }
3478
3479 static __be32 nfsd4_encode_readv(struct nfsd4_compoundres *resp,
3480 struct nfsd4_read *read,
3481 struct file *file, unsigned long maxcount)
3482 {
3483 struct xdr_stream *xdr = &resp->xdr;
3484 u32 eof;
3485 int v;
3486 int starting_len = xdr->buf->len - 8;
3487 long len;
3488 int thislen;
3489 __be32 nfserr;
3490 __be32 tmp;
3491 __be32 *p;
3492 u32 zzz = 0;
3493 int pad;
3494
3495 len = maxcount;
3496 v = 0;
3497
3498 thislen = min_t(long, len, ((void *)xdr->end - (void *)xdr->p));
3499 p = xdr_reserve_space(xdr, (thislen+3)&~3);
3500 WARN_ON_ONCE(!p);
3501 resp->rqstp->rq_vec[v].iov_base = p;
3502 resp->rqstp->rq_vec[v].iov_len = thislen;
3503 v++;
3504 len -= thislen;
3505
3506 while (len) {
3507 thislen = min_t(long, len, PAGE_SIZE);
3508 p = xdr_reserve_space(xdr, (thislen+3)&~3);
3509 WARN_ON_ONCE(!p);
3510 resp->rqstp->rq_vec[v].iov_base = p;
3511 resp->rqstp->rq_vec[v].iov_len = thislen;
3512 v++;
3513 len -= thislen;
3514 }
3515 read->rd_vlen = v;
3516
3517 len = maxcount;
3518 nfserr = nfsd_readv(resp->rqstp, read->rd_fhp, file, read->rd_offset,
3519 resp->rqstp->rq_vec, read->rd_vlen, &maxcount);
3520 read->rd_length = maxcount;
3521 if (nfserr)
3522 return nfserr;
3523 xdr_truncate_encode(xdr, starting_len + 8 + ((maxcount+3)&~3));
3524
3525 eof = nfsd_eof_on_read(len, maxcount, read->rd_offset,
3526 d_inode(read->rd_fhp->fh_dentry)->i_size);
3527
3528 tmp = htonl(eof);
3529 write_bytes_to_xdr_buf(xdr->buf, starting_len , &tmp, 4);
3530 tmp = htonl(maxcount);
3531 write_bytes_to_xdr_buf(xdr->buf, starting_len + 4, &tmp, 4);
3532
3533 pad = (maxcount&3) ? 4 - (maxcount&3) : 0;
3534 write_bytes_to_xdr_buf(xdr->buf, starting_len + 8 + maxcount,
3535 &zzz, pad);
3536 return 0;
3537
3538 }
3539
3540 static __be32
3541 nfsd4_encode_read(struct nfsd4_compoundres *resp, __be32 nfserr,
3542 struct nfsd4_read *read)
3543 {
3544 unsigned long maxcount;
3545 struct xdr_stream *xdr = &resp->xdr;
3546 struct file *file = read->rd_filp;
3547 int starting_len = xdr->buf->len;
3548 struct raparms *ra = NULL;
3549 __be32 *p;
3550
3551 p = xdr_reserve_space(xdr, 8); /* eof flag and byte count */
3552 if (!p) {
3553 WARN_ON_ONCE(test_bit(RQ_SPLICE_OK, &resp->rqstp->rq_flags));
3554 return nfserr_resource;
3555 }
3556 if (resp->xdr.buf->page_len &&
3557 test_bit(RQ_SPLICE_OK, &resp->rqstp->rq_flags)) {
3558 WARN_ON_ONCE(1);
3559 return nfserr_resource;
3560 }
3561 xdr_commit_encode(xdr);
3562
3563 maxcount = svc_max_payload(resp->rqstp);
3564 maxcount = min_t(unsigned long, maxcount,
3565 (xdr->buf->buflen - xdr->buf->len));
3566 maxcount = min_t(unsigned long, maxcount, read->rd_length);
3567
3568 if (read->rd_tmp_file)
3569 ra = nfsd_init_raparms(file);
3570
3571 if (file->f_op->splice_read &&
3572 test_bit(RQ_SPLICE_OK, &resp->rqstp->rq_flags))
3573 nfserr = nfsd4_encode_splice_read(resp, read, file, maxcount);
3574 else
3575 nfserr = nfsd4_encode_readv(resp, read, file, maxcount);
3576
3577 if (ra)
3578 nfsd_put_raparams(file, ra);
3579
3580 if (nfserr)
3581 xdr_truncate_encode(xdr, starting_len);
3582
3583 return nfserr;
3584 }
3585
3586 static __be32
3587 nfsd4_encode_readlink(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readlink *readlink)
3588 {
3589 int maxcount;
3590 __be32 wire_count;
3591 int zero = 0;
3592 struct xdr_stream *xdr = &resp->xdr;
3593 int length_offset = xdr->buf->len;
3594 __be32 *p;
3595
3596 p = xdr_reserve_space(xdr, 4);
3597 if (!p)
3598 return nfserr_resource;
3599 maxcount = PAGE_SIZE;
3600
3601 p = xdr_reserve_space(xdr, maxcount);
3602 if (!p)
3603 return nfserr_resource;
3604 /*
3605 * XXX: By default, vfs_readlink() will truncate symlinks if they
3606 * would overflow the buffer. Is this kosher in NFSv4? If not, one
3607 * easy fix is: if vfs_readlink() precisely fills the buffer, assume
3608 * that truncation occurred, and return NFS4ERR_RESOURCE.
3609 */
3610 nfserr = nfsd_readlink(readlink->rl_rqstp, readlink->rl_fhp,
3611 (char *)p, &maxcount);
3612 if (nfserr == nfserr_isdir)
3613 nfserr = nfserr_inval;
3614 if (nfserr) {
3615 xdr_truncate_encode(xdr, length_offset);
3616 return nfserr;
3617 }
3618
3619 wire_count = htonl(maxcount);
3620 write_bytes_to_xdr_buf(xdr->buf, length_offset, &wire_count, 4);
3621 xdr_truncate_encode(xdr, length_offset + 4 + ALIGN(maxcount, 4));
3622 if (maxcount & 3)
3623 write_bytes_to_xdr_buf(xdr->buf, length_offset + 4 + maxcount,
3624 &zero, 4 - (maxcount&3));
3625 return 0;
3626 }
3627
3628 static __be32
3629 nfsd4_encode_readdir(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readdir *readdir)
3630 {
3631 int maxcount;
3632 int bytes_left;
3633 loff_t offset;
3634 __be64 wire_offset;
3635 struct xdr_stream *xdr = &resp->xdr;
3636 int starting_len = xdr->buf->len;
3637 __be32 *p;
3638
3639 p = xdr_reserve_space(xdr, NFS4_VERIFIER_SIZE);
3640 if (!p)
3641 return nfserr_resource;
3642
3643 /* XXX: Following NFSv3, we ignore the READDIR verifier for now. */
3644 *p++ = cpu_to_be32(0);
3645 *p++ = cpu_to_be32(0);
3646 resp->xdr.buf->head[0].iov_len = ((char *)resp->xdr.p)
3647 - (char *)resp->xdr.buf->head[0].iov_base;
3648
3649 /*
3650 * Number of bytes left for directory entries allowing for the
3651 * final 8 bytes of the readdir and a following failed op:
3652 */
3653 bytes_left = xdr->buf->buflen - xdr->buf->len
3654 - COMPOUND_ERR_SLACK_SPACE - 8;
3655 if (bytes_left < 0) {
3656 nfserr = nfserr_resource;
3657 goto err_no_verf;
3658 }
3659 maxcount = svc_max_payload(resp->rqstp);
3660 maxcount = min_t(u32, readdir->rd_maxcount, maxcount);
3661 /*
3662 * Note the rfc defines rd_maxcount as the size of the
3663 * READDIR4resok structure, which includes the verifier above
3664 * and the 8 bytes encoded at the end of this function:
3665 */
3666 if (maxcount < 16) {
3667 nfserr = nfserr_toosmall;
3668 goto err_no_verf;
3669 }
3670 maxcount = min_t(int, maxcount-16, bytes_left);
3671
3672 /* RFC 3530 14.2.24 allows us to ignore dircount when it's 0: */
3673 if (!readdir->rd_dircount)
3674 readdir->rd_dircount = svc_max_payload(resp->rqstp);
3675
3676 readdir->xdr = xdr;
3677 readdir->rd_maxcount = maxcount;
3678 readdir->common.err = 0;
3679 readdir->cookie_offset = 0;
3680
3681 offset = readdir->rd_cookie;
3682 nfserr = nfsd_readdir(readdir->rd_rqstp, readdir->rd_fhp,
3683 &offset,
3684 &readdir->common, nfsd4_encode_dirent);
3685 if (nfserr == nfs_ok &&
3686 readdir->common.err == nfserr_toosmall &&
3687 xdr->buf->len == starting_len + 8) {
3688 /* nothing encoded; which limit did we hit?: */
3689 if (maxcount - 16 < bytes_left)
3690 /* It was the fault of rd_maxcount: */
3691 nfserr = nfserr_toosmall;
3692 else
3693 /* We ran out of buffer space: */
3694 nfserr = nfserr_resource;
3695 }
3696 if (nfserr)
3697 goto err_no_verf;
3698
3699 if (readdir->cookie_offset) {
3700 wire_offset = cpu_to_be64(offset);
3701 write_bytes_to_xdr_buf(xdr->buf, readdir->cookie_offset,
3702 &wire_offset, 8);
3703 }
3704
3705 p = xdr_reserve_space(xdr, 8);
3706 if (!p) {
3707 WARN_ON_ONCE(1);
3708 goto err_no_verf;
3709 }
3710 *p++ = 0; /* no more entries */
3711 *p++ = htonl(readdir->common.err == nfserr_eof);
3712
3713 return 0;
3714 err_no_verf:
3715 xdr_truncate_encode(xdr, starting_len);
3716 return nfserr;
3717 }
3718
3719 static __be32
3720 nfsd4_encode_remove(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_remove *remove)
3721 {
3722 struct xdr_stream *xdr = &resp->xdr;
3723 __be32 *p;
3724
3725 p = xdr_reserve_space(xdr, 20);
3726 if (!p)
3727 return nfserr_resource;
3728 p = encode_cinfo(p, &remove->rm_cinfo);
3729 return 0;
3730 }
3731
3732 static __be32
3733 nfsd4_encode_rename(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_rename *rename)
3734 {
3735 struct xdr_stream *xdr = &resp->xdr;
3736 __be32 *p;
3737
3738 p = xdr_reserve_space(xdr, 40);
3739 if (!p)
3740 return nfserr_resource;
3741 p = encode_cinfo(p, &rename->rn_sinfo);
3742 p = encode_cinfo(p, &rename->rn_tinfo);
3743 return 0;
3744 }
3745
3746 static __be32
3747 nfsd4_do_encode_secinfo(struct xdr_stream *xdr, struct svc_export *exp)
3748 {
3749 u32 i, nflavs, supported;
3750 struct exp_flavor_info *flavs;
3751 struct exp_flavor_info def_flavs[2];
3752 __be32 *p, *flavorsp;
3753 static bool report = true;
3754
3755 if (exp->ex_nflavors) {
3756 flavs = exp->ex_flavors;
3757 nflavs = exp->ex_nflavors;
3758 } else { /* Handling of some defaults in absence of real secinfo: */
3759 flavs = def_flavs;
3760 if (exp->ex_client->flavour->flavour == RPC_AUTH_UNIX) {
3761 nflavs = 2;
3762 flavs[0].pseudoflavor = RPC_AUTH_UNIX;
3763 flavs[1].pseudoflavor = RPC_AUTH_NULL;
3764 } else if (exp->ex_client->flavour->flavour == RPC_AUTH_GSS) {
3765 nflavs = 1;
3766 flavs[0].pseudoflavor
3767 = svcauth_gss_flavor(exp->ex_client);
3768 } else {
3769 nflavs = 1;
3770 flavs[0].pseudoflavor
3771 = exp->ex_client->flavour->flavour;
3772 }
3773 }
3774
3775 supported = 0;
3776 p = xdr_reserve_space(xdr, 4);
3777 if (!p)
3778 return nfserr_resource;
3779 flavorsp = p++; /* to be backfilled later */
3780
3781 for (i = 0; i < nflavs; i++) {
3782 rpc_authflavor_t pf = flavs[i].pseudoflavor;
3783 struct rpcsec_gss_info info;
3784
3785 if (rpcauth_get_gssinfo(pf, &info) == 0) {
3786 supported++;
3787 p = xdr_reserve_space(xdr, 4 + 4 +
3788 XDR_LEN(info.oid.len) + 4 + 4);
3789 if (!p)
3790 return nfserr_resource;
3791 *p++ = cpu_to_be32(RPC_AUTH_GSS);
3792 p = xdr_encode_opaque(p, info.oid.data, info.oid.len);
3793 *p++ = cpu_to_be32(info.qop);
3794 *p++ = cpu_to_be32(info.service);
3795 } else if (pf < RPC_AUTH_MAXFLAVOR) {
3796 supported++;
3797 p = xdr_reserve_space(xdr, 4);
3798 if (!p)
3799 return nfserr_resource;
3800 *p++ = cpu_to_be32(pf);
3801 } else {
3802 if (report)
3803 pr_warn("NFS: SECINFO: security flavor %u "
3804 "is not supported\n", pf);
3805 }
3806 }
3807
3808 if (nflavs != supported)
3809 report = false;
3810 *flavorsp = htonl(supported);
3811 return 0;
3812 }
3813
3814 static __be32
3815 nfsd4_encode_secinfo(struct nfsd4_compoundres *resp, __be32 nfserr,
3816 struct nfsd4_secinfo *secinfo)
3817 {
3818 struct xdr_stream *xdr = &resp->xdr;
3819
3820 return nfsd4_do_encode_secinfo(xdr, secinfo->si_exp);
3821 }
3822
3823 static __be32
3824 nfsd4_encode_secinfo_no_name(struct nfsd4_compoundres *resp, __be32 nfserr,
3825 struct nfsd4_secinfo_no_name *secinfo)
3826 {
3827 struct xdr_stream *xdr = &resp->xdr;
3828
3829 return nfsd4_do_encode_secinfo(xdr, secinfo->sin_exp);
3830 }
3831
3832 /*
3833 * The SETATTR encode routine is special -- it always encodes a bitmap,
3834 * regardless of the error status.
3835 */
3836 static __be32
3837 nfsd4_encode_setattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setattr *setattr)
3838 {
3839 struct xdr_stream *xdr = &resp->xdr;
3840 __be32 *p;
3841
3842 p = xdr_reserve_space(xdr, 16);
3843 if (!p)
3844 return nfserr_resource;
3845 if (nfserr) {
3846 *p++ = cpu_to_be32(3);
3847 *p++ = cpu_to_be32(0);
3848 *p++ = cpu_to_be32(0);
3849 *p++ = cpu_to_be32(0);
3850 }
3851 else {
3852 *p++ = cpu_to_be32(3);
3853 *p++ = cpu_to_be32(setattr->sa_bmval[0]);
3854 *p++ = cpu_to_be32(setattr->sa_bmval[1]);
3855 *p++ = cpu_to_be32(setattr->sa_bmval[2]);
3856 }
3857 return nfserr;
3858 }
3859
3860 static __be32
3861 nfsd4_encode_setclientid(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setclientid *scd)
3862 {
3863 struct xdr_stream *xdr = &resp->xdr;
3864 __be32 *p;
3865
3866 if (!nfserr) {
3867 p = xdr_reserve_space(xdr, 8 + NFS4_VERIFIER_SIZE);
3868 if (!p)
3869 return nfserr_resource;
3870 p = xdr_encode_opaque_fixed(p, &scd->se_clientid, 8);
3871 p = xdr_encode_opaque_fixed(p, &scd->se_confirm,
3872 NFS4_VERIFIER_SIZE);
3873 }
3874 else if (nfserr == nfserr_clid_inuse) {
3875 p = xdr_reserve_space(xdr, 8);
3876 if (!p)
3877 return nfserr_resource;
3878 *p++ = cpu_to_be32(0);
3879 *p++ = cpu_to_be32(0);
3880 }
3881 return nfserr;
3882 }
3883
3884 static __be32
3885 nfsd4_encode_write(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_write *write)
3886 {
3887 struct xdr_stream *xdr = &resp->xdr;
3888 __be32 *p;
3889
3890 p = xdr_reserve_space(xdr, 16);
3891 if (!p)
3892 return nfserr_resource;
3893 *p++ = cpu_to_be32(write->wr_bytes_written);
3894 *p++ = cpu_to_be32(write->wr_how_written);
3895 p = xdr_encode_opaque_fixed(p, write->wr_verifier.data,
3896 NFS4_VERIFIER_SIZE);
3897 return 0;
3898 }
3899
3900 static __be32
3901 nfsd4_encode_exchange_id(struct nfsd4_compoundres *resp, __be32 nfserr,
3902 struct nfsd4_exchange_id *exid)
3903 {
3904 struct xdr_stream *xdr = &resp->xdr;
3905 __be32 *p;
3906 char *major_id;
3907 char *server_scope;
3908 int major_id_sz;
3909 int server_scope_sz;
3910 uint64_t minor_id = 0;
3911
3912 major_id = utsname()->nodename;
3913 major_id_sz = strlen(major_id);
3914 server_scope = utsname()->nodename;
3915 server_scope_sz = strlen(server_scope);
3916
3917 p = xdr_reserve_space(xdr,
3918 8 /* eir_clientid */ +
3919 4 /* eir_sequenceid */ +
3920 4 /* eir_flags */ +
3921 4 /* spr_how */);
3922 if (!p)
3923 return nfserr_resource;
3924
3925 p = xdr_encode_opaque_fixed(p, &exid->clientid, 8);
3926 *p++ = cpu_to_be32(exid->seqid);
3927 *p++ = cpu_to_be32(exid->flags);
3928
3929 *p++ = cpu_to_be32(exid->spa_how);
3930
3931 switch (exid->spa_how) {
3932 case SP4_NONE:
3933 break;
3934 case SP4_MACH_CRED:
3935 /* spo_must_enforce bitmap: */
3936 nfserr = nfsd4_encode_bitmap(xdr,
3937 exid->spo_must_enforce[0],
3938 exid->spo_must_enforce[1],
3939 exid->spo_must_enforce[2]);
3940 if (nfserr)
3941 return nfserr;
3942 /* spo_must_allow bitmap: */
3943 nfserr = nfsd4_encode_bitmap(xdr,
3944 exid->spo_must_allow[0],
3945 exid->spo_must_allow[1],
3946 exid->spo_must_allow[2]);
3947 if (nfserr)
3948 return nfserr;
3949 break;
3950 default:
3951 WARN_ON_ONCE(1);
3952 }
3953
3954 p = xdr_reserve_space(xdr,
3955 8 /* so_minor_id */ +
3956 4 /* so_major_id.len */ +
3957 (XDR_QUADLEN(major_id_sz) * 4) +
3958 4 /* eir_server_scope.len */ +
3959 (XDR_QUADLEN(server_scope_sz) * 4) +
3960 4 /* eir_server_impl_id.count (0) */);
3961 if (!p)
3962 return nfserr_resource;
3963
3964 /* The server_owner struct */
3965 p = xdr_encode_hyper(p, minor_id); /* Minor id */
3966 /* major id */
3967 p = xdr_encode_opaque(p, major_id, major_id_sz);
3968
3969 /* Server scope */
3970 p = xdr_encode_opaque(p, server_scope, server_scope_sz);
3971
3972 /* Implementation id */
3973 *p++ = cpu_to_be32(0); /* zero length nfs_impl_id4 array */
3974 return 0;
3975 }
3976
3977 static __be32
3978 nfsd4_encode_create_session(struct nfsd4_compoundres *resp, __be32 nfserr,
3979 struct nfsd4_create_session *sess)
3980 {
3981 struct xdr_stream *xdr = &resp->xdr;
3982 __be32 *p;
3983
3984 p = xdr_reserve_space(xdr, 24);
3985 if (!p)
3986 return nfserr_resource;
3987 p = xdr_encode_opaque_fixed(p, sess->sessionid.data,
3988 NFS4_MAX_SESSIONID_LEN);
3989 *p++ = cpu_to_be32(sess->seqid);
3990 *p++ = cpu_to_be32(sess->flags);
3991
3992 p = xdr_reserve_space(xdr, 28);
3993 if (!p)
3994 return nfserr_resource;
3995 *p++ = cpu_to_be32(0); /* headerpadsz */
3996 *p++ = cpu_to_be32(sess->fore_channel.maxreq_sz);
3997 *p++ = cpu_to_be32(sess->fore_channel.maxresp_sz);
3998 *p++ = cpu_to_be32(sess->fore_channel.maxresp_cached);
3999 *p++ = cpu_to_be32(sess->fore_channel.maxops);
4000 *p++ = cpu_to_be32(sess->fore_channel.maxreqs);
4001 *p++ = cpu_to_be32(sess->fore_channel.nr_rdma_attrs);
4002
4003 if (sess->fore_channel.nr_rdma_attrs) {
4004 p = xdr_reserve_space(xdr, 4);
4005 if (!p)
4006 return nfserr_resource;
4007 *p++ = cpu_to_be32(sess->fore_channel.rdma_attrs);
4008 }
4009
4010 p = xdr_reserve_space(xdr, 28);
4011 if (!p)
4012 return nfserr_resource;
4013 *p++ = cpu_to_be32(0); /* headerpadsz */
4014 *p++ = cpu_to_be32(sess->back_channel.maxreq_sz);
4015 *p++ = cpu_to_be32(sess->back_channel.maxresp_sz);
4016 *p++ = cpu_to_be32(sess->back_channel.maxresp_cached);
4017 *p++ = cpu_to_be32(sess->back_channel.maxops);
4018 *p++ = cpu_to_be32(sess->back_channel.maxreqs);
4019 *p++ = cpu_to_be32(sess->back_channel.nr_rdma_attrs);
4020
4021 if (sess->back_channel.nr_rdma_attrs) {
4022 p = xdr_reserve_space(xdr, 4);
4023 if (!p)
4024 return nfserr_resource;
4025 *p++ = cpu_to_be32(sess->back_channel.rdma_attrs);
4026 }
4027 return 0;
4028 }
4029
4030 static __be32
4031 nfsd4_encode_sequence(struct nfsd4_compoundres *resp, __be32 nfserr,
4032 struct nfsd4_sequence *seq)
4033 {
4034 struct xdr_stream *xdr = &resp->xdr;
4035 __be32 *p;
4036
4037 p = xdr_reserve_space(xdr, NFS4_MAX_SESSIONID_LEN + 20);
4038 if (!p)
4039 return nfserr_resource;
4040 p = xdr_encode_opaque_fixed(p, seq->sessionid.data,
4041 NFS4_MAX_SESSIONID_LEN);
4042 *p++ = cpu_to_be32(seq->seqid);
4043 *p++ = cpu_to_be32(seq->slotid);
4044 /* Note slotid's are numbered from zero: */
4045 *p++ = cpu_to_be32(seq->maxslots - 1); /* sr_highest_slotid */
4046 *p++ = cpu_to_be32(seq->maxslots - 1); /* sr_target_highest_slotid */
4047 *p++ = cpu_to_be32(seq->status_flags);
4048
4049 resp->cstate.data_offset = xdr->buf->len; /* DRC cache data pointer */
4050 return 0;
4051 }
4052
4053 static __be32
4054 nfsd4_encode_test_stateid(struct nfsd4_compoundres *resp, __be32 nfserr,
4055 struct nfsd4_test_stateid *test_stateid)
4056 {
4057 struct xdr_stream *xdr = &resp->xdr;
4058 struct nfsd4_test_stateid_id *stateid, *next;
4059 __be32 *p;
4060
4061 p = xdr_reserve_space(xdr, 4 + (4 * test_stateid->ts_num_ids));
4062 if (!p)
4063 return nfserr_resource;
4064 *p++ = htonl(test_stateid->ts_num_ids);
4065
4066 list_for_each_entry_safe(stateid, next, &test_stateid->ts_stateid_list, ts_id_list) {
4067 *p++ = stateid->ts_id_status;
4068 }
4069
4070 return 0;
4071 }
4072
4073 #ifdef CONFIG_NFSD_PNFS
4074 static __be32
4075 nfsd4_encode_getdeviceinfo(struct nfsd4_compoundres *resp, __be32 nfserr,
4076 struct nfsd4_getdeviceinfo *gdev)
4077 {
4078 struct xdr_stream *xdr = &resp->xdr;
4079 const struct nfsd4_layout_ops *ops;
4080 u32 starting_len = xdr->buf->len, needed_len;
4081 __be32 *p;
4082
4083 p = xdr_reserve_space(xdr, 4);
4084 if (!p)
4085 return nfserr_resource;
4086
4087 *p++ = cpu_to_be32(gdev->gd_layout_type);
4088
4089 /* If maxcount is 0 then just update notifications */
4090 if (gdev->gd_maxcount != 0) {
4091 ops = nfsd4_layout_ops[gdev->gd_layout_type];
4092 nfserr = ops->encode_getdeviceinfo(xdr, gdev);
4093 if (nfserr) {
4094 /*
4095 * We don't bother to burden the layout drivers with
4096 * enforcing gd_maxcount, just tell the client to
4097 * come back with a bigger buffer if it's not enough.
4098 */
4099 if (xdr->buf->len + 4 > gdev->gd_maxcount)
4100 goto toosmall;
4101 return nfserr;
4102 }
4103 }
4104
4105 if (gdev->gd_notify_types) {
4106 p = xdr_reserve_space(xdr, 4 + 4);
4107 if (!p)
4108 return nfserr_resource;
4109 *p++ = cpu_to_be32(1); /* bitmap length */
4110 *p++ = cpu_to_be32(gdev->gd_notify_types);
4111 } else {
4112 p = xdr_reserve_space(xdr, 4);
4113 if (!p)
4114 return nfserr_resource;
4115 *p++ = 0;
4116 }
4117
4118 return 0;
4119 toosmall:
4120 dprintk("%s: maxcount too small\n", __func__);
4121 needed_len = xdr->buf->len + 4 /* notifications */;
4122 xdr_truncate_encode(xdr, starting_len);
4123 p = xdr_reserve_space(xdr, 4);
4124 if (!p)
4125 return nfserr_resource;
4126 *p++ = cpu_to_be32(needed_len);
4127 return nfserr_toosmall;
4128 }
4129
4130 static __be32
4131 nfsd4_encode_layoutget(struct nfsd4_compoundres *resp, __be32 nfserr,
4132 struct nfsd4_layoutget *lgp)
4133 {
4134 struct xdr_stream *xdr = &resp->xdr;
4135 const struct nfsd4_layout_ops *ops;
4136 __be32 *p;
4137
4138 p = xdr_reserve_space(xdr, 36 + sizeof(stateid_opaque_t));
4139 if (!p)
4140 return nfserr_resource;
4141
4142 *p++ = cpu_to_be32(1); /* we always set return-on-close */
4143 *p++ = cpu_to_be32(lgp->lg_sid.si_generation);
4144 p = xdr_encode_opaque_fixed(p, &lgp->lg_sid.si_opaque,
4145 sizeof(stateid_opaque_t));
4146
4147 *p++ = cpu_to_be32(1); /* we always return a single layout */
4148 p = xdr_encode_hyper(p, lgp->lg_seg.offset);
4149 p = xdr_encode_hyper(p, lgp->lg_seg.length);
4150 *p++ = cpu_to_be32(lgp->lg_seg.iomode);
4151 *p++ = cpu_to_be32(lgp->lg_layout_type);
4152
4153 ops = nfsd4_layout_ops[lgp->lg_layout_type];
4154 return ops->encode_layoutget(xdr, lgp);
4155 }
4156
4157 static __be32
4158 nfsd4_encode_layoutcommit(struct nfsd4_compoundres *resp, __be32 nfserr,
4159 struct nfsd4_layoutcommit *lcp)
4160 {
4161 struct xdr_stream *xdr = &resp->xdr;
4162 __be32 *p;
4163
4164 p = xdr_reserve_space(xdr, 4);
4165 if (!p)
4166 return nfserr_resource;
4167 *p++ = cpu_to_be32(lcp->lc_size_chg);
4168 if (lcp->lc_size_chg) {
4169 p = xdr_reserve_space(xdr, 8);
4170 if (!p)
4171 return nfserr_resource;
4172 p = xdr_encode_hyper(p, lcp->lc_newsize);
4173 }
4174
4175 return 0;
4176 }
4177
4178 static __be32
4179 nfsd4_encode_layoutreturn(struct nfsd4_compoundres *resp, __be32 nfserr,
4180 struct nfsd4_layoutreturn *lrp)
4181 {
4182 struct xdr_stream *xdr = &resp->xdr;
4183 __be32 *p;
4184
4185 p = xdr_reserve_space(xdr, 4);
4186 if (!p)
4187 return nfserr_resource;
4188 *p++ = cpu_to_be32(lrp->lrs_present);
4189 if (lrp->lrs_present)
4190 return nfsd4_encode_stateid(xdr, &lrp->lr_sid);
4191 return 0;
4192 }
4193 #endif /* CONFIG_NFSD_PNFS */
4194
4195 static __be32
4196 nfsd42_encode_write_res(struct nfsd4_compoundres *resp, struct nfsd42_write_res *write)
4197 {
4198 __be32 *p;
4199
4200 p = xdr_reserve_space(&resp->xdr, 4 + 8 + 4 + NFS4_VERIFIER_SIZE);
4201 if (!p)
4202 return nfserr_resource;
4203
4204 *p++ = cpu_to_be32(0);
4205 p = xdr_encode_hyper(p, write->wr_bytes_written);
4206 *p++ = cpu_to_be32(write->wr_stable_how);
4207 p = xdr_encode_opaque_fixed(p, write->wr_verifier.data,
4208 NFS4_VERIFIER_SIZE);
4209 return nfs_ok;
4210 }
4211
4212 static __be32
4213 nfsd4_encode_copy(struct nfsd4_compoundres *resp, __be32 nfserr,
4214 struct nfsd4_copy *copy)
4215 {
4216 __be32 *p;
4217
4218 nfserr = nfsd42_encode_write_res(resp, &copy->cp_res);
4219 if (nfserr)
4220 return nfserr;
4221
4222 p = xdr_reserve_space(&resp->xdr, 4 + 4);
4223 *p++ = xdr_one; /* cr_consecutive */
4224 *p++ = cpu_to_be32(copy->cp_synchronous);
4225 return 0;
4226 }
4227
4228 static __be32
4229 nfsd4_encode_seek(struct nfsd4_compoundres *resp, __be32 nfserr,
4230 struct nfsd4_seek *seek)
4231 {
4232 __be32 *p;
4233
4234 p = xdr_reserve_space(&resp->xdr, 4 + 8);
4235 *p++ = cpu_to_be32(seek->seek_eof);
4236 p = xdr_encode_hyper(p, seek->seek_pos);
4237
4238 return 0;
4239 }
4240
4241 static __be32
4242 nfsd4_encode_noop(struct nfsd4_compoundres *resp, __be32 nfserr, void *p)
4243 {
4244 return nfserr;
4245 }
4246
4247 typedef __be32(* nfsd4_enc)(struct nfsd4_compoundres *, __be32, void *);
4248
4249 /*
4250 * Note: nfsd4_enc_ops vector is shared for v4.0 and v4.1
4251 * since we don't need to filter out obsolete ops as this is
4252 * done in the decoding phase.
4253 */
4254 static const nfsd4_enc nfsd4_enc_ops[] = {
4255 [OP_ACCESS] = (nfsd4_enc)nfsd4_encode_access,
4256 [OP_CLOSE] = (nfsd4_enc)nfsd4_encode_close,
4257 [OP_COMMIT] = (nfsd4_enc)nfsd4_encode_commit,
4258 [OP_CREATE] = (nfsd4_enc)nfsd4_encode_create,
4259 [OP_DELEGPURGE] = (nfsd4_enc)nfsd4_encode_noop,
4260 [OP_DELEGRETURN] = (nfsd4_enc)nfsd4_encode_noop,
4261 [OP_GETATTR] = (nfsd4_enc)nfsd4_encode_getattr,
4262 [OP_GETFH] = (nfsd4_enc)nfsd4_encode_getfh,
4263 [OP_LINK] = (nfsd4_enc)nfsd4_encode_link,
4264 [OP_LOCK] = (nfsd4_enc)nfsd4_encode_lock,
4265 [OP_LOCKT] = (nfsd4_enc)nfsd4_encode_lockt,
4266 [OP_LOCKU] = (nfsd4_enc)nfsd4_encode_locku,
4267 [OP_LOOKUP] = (nfsd4_enc)nfsd4_encode_noop,
4268 [OP_LOOKUPP] = (nfsd4_enc)nfsd4_encode_noop,
4269 [OP_NVERIFY] = (nfsd4_enc)nfsd4_encode_noop,
4270 [OP_OPEN] = (nfsd4_enc)nfsd4_encode_open,
4271 [OP_OPENATTR] = (nfsd4_enc)nfsd4_encode_noop,
4272 [OP_OPEN_CONFIRM] = (nfsd4_enc)nfsd4_encode_open_confirm,
4273 [OP_OPEN_DOWNGRADE] = (nfsd4_enc)nfsd4_encode_open_downgrade,
4274 [OP_PUTFH] = (nfsd4_enc)nfsd4_encode_noop,
4275 [OP_PUTPUBFH] = (nfsd4_enc)nfsd4_encode_noop,
4276 [OP_PUTROOTFH] = (nfsd4_enc)nfsd4_encode_noop,
4277 [OP_READ] = (nfsd4_enc)nfsd4_encode_read,
4278 [OP_READDIR] = (nfsd4_enc)nfsd4_encode_readdir,
4279 [OP_READLINK] = (nfsd4_enc)nfsd4_encode_readlink,
4280 [OP_REMOVE] = (nfsd4_enc)nfsd4_encode_remove,
4281 [OP_RENAME] = (nfsd4_enc)nfsd4_encode_rename,
4282 [OP_RENEW] = (nfsd4_enc)nfsd4_encode_noop,
4283 [OP_RESTOREFH] = (nfsd4_enc)nfsd4_encode_noop,
4284 [OP_SAVEFH] = (nfsd4_enc)nfsd4_encode_noop,
4285 [OP_SECINFO] = (nfsd4_enc)nfsd4_encode_secinfo,
4286 [OP_SETATTR] = (nfsd4_enc)nfsd4_encode_setattr,
4287 [OP_SETCLIENTID] = (nfsd4_enc)nfsd4_encode_setclientid,
4288 [OP_SETCLIENTID_CONFIRM] = (nfsd4_enc)nfsd4_encode_noop,
4289 [OP_VERIFY] = (nfsd4_enc)nfsd4_encode_noop,
4290 [OP_WRITE] = (nfsd4_enc)nfsd4_encode_write,
4291 [OP_RELEASE_LOCKOWNER] = (nfsd4_enc)nfsd4_encode_noop,
4292
4293 /* NFSv4.1 operations */
4294 [OP_BACKCHANNEL_CTL] = (nfsd4_enc)nfsd4_encode_noop,
4295 [OP_BIND_CONN_TO_SESSION] = (nfsd4_enc)nfsd4_encode_bind_conn_to_session,
4296 [OP_EXCHANGE_ID] = (nfsd4_enc)nfsd4_encode_exchange_id,
4297 [OP_CREATE_SESSION] = (nfsd4_enc)nfsd4_encode_create_session,
4298 [OP_DESTROY_SESSION] = (nfsd4_enc)nfsd4_encode_noop,
4299 [OP_FREE_STATEID] = (nfsd4_enc)nfsd4_encode_noop,
4300 [OP_GET_DIR_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop,
4301 #ifdef CONFIG_NFSD_PNFS
4302 [OP_GETDEVICEINFO] = (nfsd4_enc)nfsd4_encode_getdeviceinfo,
4303 [OP_GETDEVICELIST] = (nfsd4_enc)nfsd4_encode_noop,
4304 [OP_LAYOUTCOMMIT] = (nfsd4_enc)nfsd4_encode_layoutcommit,
4305 [OP_LAYOUTGET] = (nfsd4_enc)nfsd4_encode_layoutget,
4306 [OP_LAYOUTRETURN] = (nfsd4_enc)nfsd4_encode_layoutreturn,
4307 #else
4308 [OP_GETDEVICEINFO] = (nfsd4_enc)nfsd4_encode_noop,
4309 [OP_GETDEVICELIST] = (nfsd4_enc)nfsd4_encode_noop,
4310 [OP_LAYOUTCOMMIT] = (nfsd4_enc)nfsd4_encode_noop,
4311 [OP_LAYOUTGET] = (nfsd4_enc)nfsd4_encode_noop,
4312 [OP_LAYOUTRETURN] = (nfsd4_enc)nfsd4_encode_noop,
4313 #endif
4314 [OP_SECINFO_NO_NAME] = (nfsd4_enc)nfsd4_encode_secinfo_no_name,
4315 [OP_SEQUENCE] = (nfsd4_enc)nfsd4_encode_sequence,
4316 [OP_SET_SSV] = (nfsd4_enc)nfsd4_encode_noop,
4317 [OP_TEST_STATEID] = (nfsd4_enc)nfsd4_encode_test_stateid,
4318 [OP_WANT_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop,
4319 [OP_DESTROY_CLIENTID] = (nfsd4_enc)nfsd4_encode_noop,
4320 [OP_RECLAIM_COMPLETE] = (nfsd4_enc)nfsd4_encode_noop,
4321
4322 /* NFSv4.2 operations */
4323 [OP_ALLOCATE] = (nfsd4_enc)nfsd4_encode_noop,
4324 [OP_COPY] = (nfsd4_enc)nfsd4_encode_copy,
4325 [OP_COPY_NOTIFY] = (nfsd4_enc)nfsd4_encode_noop,
4326 [OP_DEALLOCATE] = (nfsd4_enc)nfsd4_encode_noop,
4327 [OP_IO_ADVISE] = (nfsd4_enc)nfsd4_encode_noop,
4328 [OP_LAYOUTERROR] = (nfsd4_enc)nfsd4_encode_noop,
4329 [OP_LAYOUTSTATS] = (nfsd4_enc)nfsd4_encode_noop,
4330 [OP_OFFLOAD_CANCEL] = (nfsd4_enc)nfsd4_encode_noop,
4331 [OP_OFFLOAD_STATUS] = (nfsd4_enc)nfsd4_encode_noop,
4332 [OP_READ_PLUS] = (nfsd4_enc)nfsd4_encode_noop,
4333 [OP_SEEK] = (nfsd4_enc)nfsd4_encode_seek,
4334 [OP_WRITE_SAME] = (nfsd4_enc)nfsd4_encode_noop,
4335 [OP_CLONE] = (nfsd4_enc)nfsd4_encode_noop,
4336 };
4337
4338 /*
4339 * Calculate whether we still have space to encode repsize bytes.
4340 * There are two considerations:
4341 * - For NFS versions >=4.1, the size of the reply must stay within
4342 * session limits
4343 * - For all NFS versions, we must stay within limited preallocated
4344 * buffer space.
4345 *
4346 * This is called before the operation is processed, so can only provide
4347 * an upper estimate. For some nonidempotent operations (such as
4348 * getattr), it's not necessarily a problem if that estimate is wrong,
4349 * as we can fail it after processing without significant side effects.
4350 */
4351 __be32 nfsd4_check_resp_size(struct nfsd4_compoundres *resp, u32 respsize)
4352 {
4353 struct xdr_buf *buf = &resp->rqstp->rq_res;
4354 struct nfsd4_slot *slot = resp->cstate.slot;
4355
4356 if (buf->len + respsize <= buf->buflen)
4357 return nfs_ok;
4358 if (!nfsd4_has_session(&resp->cstate))
4359 return nfserr_resource;
4360 if (slot->sl_flags & NFSD4_SLOT_CACHETHIS) {
4361 WARN_ON_ONCE(1);
4362 return nfserr_rep_too_big_to_cache;
4363 }
4364 return nfserr_rep_too_big;
4365 }
4366
4367 void
4368 nfsd4_encode_operation(struct nfsd4_compoundres *resp, struct nfsd4_op *op)
4369 {
4370 struct xdr_stream *xdr = &resp->xdr;
4371 struct nfs4_stateowner *so = resp->cstate.replay_owner;
4372 struct svc_rqst *rqstp = resp->rqstp;
4373 const struct nfsd4_operation *opdesc = op->opdesc;
4374 int post_err_offset;
4375 nfsd4_enc encoder;
4376 __be32 *p;
4377
4378 p = xdr_reserve_space(xdr, 8);
4379 if (!p) {
4380 WARN_ON_ONCE(1);
4381 return;
4382 }
4383 *p++ = cpu_to_be32(op->opnum);
4384 post_err_offset = xdr->buf->len;
4385
4386 if (op->opnum == OP_ILLEGAL)
4387 goto status;
4388 if (op->status && opdesc &&
4389 !(opdesc->op_flags & OP_NONTRIVIAL_ERROR_ENCODE))
4390 goto status;
4391 BUG_ON(op->opnum < 0 || op->opnum >= ARRAY_SIZE(nfsd4_enc_ops) ||
4392 !nfsd4_enc_ops[op->opnum]);
4393 encoder = nfsd4_enc_ops[op->opnum];
4394 op->status = encoder(resp, op->status, &op->u);
4395 if (opdesc && opdesc->op_release)
4396 opdesc->op_release(&op->u);
4397 xdr_commit_encode(xdr);
4398
4399 /* nfsd4_check_resp_size guarantees enough room for error status */
4400 if (!op->status) {
4401 int space_needed = 0;
4402 if (!nfsd4_last_compound_op(rqstp))
4403 space_needed = COMPOUND_ERR_SLACK_SPACE;
4404 op->status = nfsd4_check_resp_size(resp, space_needed);
4405 }
4406 if (op->status == nfserr_resource && nfsd4_has_session(&resp->cstate)) {
4407 struct nfsd4_slot *slot = resp->cstate.slot;
4408
4409 if (slot->sl_flags & NFSD4_SLOT_CACHETHIS)
4410 op->status = nfserr_rep_too_big_to_cache;
4411 else
4412 op->status = nfserr_rep_too_big;
4413 }
4414 if (op->status == nfserr_resource ||
4415 op->status == nfserr_rep_too_big ||
4416 op->status == nfserr_rep_too_big_to_cache) {
4417 /*
4418 * The operation may have already been encoded or
4419 * partially encoded. No op returns anything additional
4420 * in the case of one of these three errors, so we can
4421 * just truncate back to after the status. But it's a
4422 * bug if we had to do this on a non-idempotent op:
4423 */
4424 warn_on_nonidempotent_op(op);
4425 xdr_truncate_encode(xdr, post_err_offset);
4426 }
4427 if (so) {
4428 int len = xdr->buf->len - post_err_offset;
4429
4430 so->so_replay.rp_status = op->status;
4431 so->so_replay.rp_buflen = len;
4432 read_bytes_from_xdr_buf(xdr->buf, post_err_offset,
4433 so->so_replay.rp_buf, len);
4434 }
4435 status:
4436 /* Note that op->status is already in network byte order: */
4437 write_bytes_to_xdr_buf(xdr->buf, post_err_offset - 4, &op->status, 4);
4438 }
4439
4440 /*
4441 * Encode the reply stored in the stateowner reply cache
4442 *
4443 * XDR note: do not encode rp->rp_buflen: the buffer contains the
4444 * previously sent already encoded operation.
4445 */
4446 void
4447 nfsd4_encode_replay(struct xdr_stream *xdr, struct nfsd4_op *op)
4448 {
4449 __be32 *p;
4450 struct nfs4_replay *rp = op->replay;
4451
4452 BUG_ON(!rp);
4453
4454 p = xdr_reserve_space(xdr, 8 + rp->rp_buflen);
4455 if (!p) {
4456 WARN_ON_ONCE(1);
4457 return;
4458 }
4459 *p++ = cpu_to_be32(op->opnum);
4460 *p++ = rp->rp_status; /* already xdr'ed */
4461
4462 p = xdr_encode_opaque_fixed(p, rp->rp_buf, rp->rp_buflen);
4463 }
4464
4465 int
4466 nfs4svc_encode_voidres(struct svc_rqst *rqstp, __be32 *p)
4467 {
4468 return xdr_ressize_check(rqstp, p);
4469 }
4470
4471 void nfsd4_release_compoundargs(struct svc_rqst *rqstp)
4472 {
4473 struct nfsd4_compoundargs *args = rqstp->rq_argp;
4474
4475 if (args->ops != args->iops) {
4476 kfree(args->ops);
4477 args->ops = args->iops;
4478 }
4479 kfree(args->tmpp);
4480 args->tmpp = NULL;
4481 while (args->to_free) {
4482 struct svcxdr_tmpbuf *tb = args->to_free;
4483 args->to_free = tb->next;
4484 kfree(tb);
4485 }
4486 }
4487
4488 int
4489 nfs4svc_decode_compoundargs(struct svc_rqst *rqstp, __be32 *p)
4490 {
4491 struct nfsd4_compoundargs *args = rqstp->rq_argp;
4492
4493 if (rqstp->rq_arg.head[0].iov_len % 4) {
4494 /* client is nuts */
4495 dprintk("%s: compound not properly padded! (peeraddr=%pISc xid=0x%x)",
4496 __func__, svc_addr(rqstp), be32_to_cpu(rqstp->rq_xid));
4497 return 0;
4498 }
4499 args->p = p;
4500 args->end = rqstp->rq_arg.head[0].iov_base + rqstp->rq_arg.head[0].iov_len;
4501 args->pagelist = rqstp->rq_arg.pages;
4502 args->pagelen = rqstp->rq_arg.page_len;
4503 args->tail = false;
4504 args->tmpp = NULL;
4505 args->to_free = NULL;
4506 args->ops = args->iops;
4507 args->rqstp = rqstp;
4508
4509 return !nfsd4_decode_compound(args);
4510 }
4511
4512 int
4513 nfs4svc_encode_compoundres(struct svc_rqst *rqstp, __be32 *p)
4514 {
4515 /*
4516 * All that remains is to write the tag and operation count...
4517 */
4518 struct nfsd4_compoundres *resp = rqstp->rq_resp;
4519 struct xdr_buf *buf = resp->xdr.buf;
4520
4521 WARN_ON_ONCE(buf->len != buf->head[0].iov_len + buf->page_len +
4522 buf->tail[0].iov_len);
4523
4524 rqstp->rq_next_page = resp->xdr.page_ptr + 1;
4525
4526 p = resp->tagp;
4527 *p++ = htonl(resp->taglen);
4528 memcpy(p, resp->tag, resp->taglen);
4529 p += XDR_QUADLEN(resp->taglen);
4530 *p++ = htonl(resp->opcnt);
4531
4532 nfsd4_sequence_done(resp);
4533 return 1;
4534 }
4535
4536 /*
4537 * Local variables:
4538 * c-basic-offset: 8
4539 * End:
4540 */
Linux with added FPC-III support