Root/
1 | /* |
2 | * Server-side XDR for NFSv4 |
3 | * |
4 | * Copyright (c) 2002 The Regents of the University of Michigan. |
5 | * All rights reserved. |
6 | * |
7 | * Kendrick Smith <kmsmith@umich.edu> |
8 | * Andy Adamson <andros@umich.edu> |
9 | * |
10 | * Redistribution and use in source and binary forms, with or without |
11 | * modification, are permitted provided that the following conditions |
12 | * are met: |
13 | * |
14 | * 1. Redistributions of source code must retain the above copyright |
15 | * notice, this list of conditions and the following disclaimer. |
16 | * 2. Redistributions in binary form must reproduce the above copyright |
17 | * notice, this list of conditions and the following disclaimer in the |
18 | * documentation and/or other materials provided with the distribution. |
19 | * 3. Neither the name of the University nor the names of its |
20 | * contributors may be used to endorse or promote products derived |
21 | * from this software without specific prior written permission. |
22 | * |
23 | * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED |
24 | * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF |
25 | * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
26 | * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
27 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
28 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
29 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR |
30 | * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF |
31 | * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING |
32 | * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS |
33 | * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
34 | * |
35 | * TODO: Neil Brown made the following observation: We currently |
36 | * initially reserve NFSD_BUFSIZE space on the transmit queue and |
37 | * never release any of that until the request is complete. |
38 | * It would be good to calculate a new maximum response size while |
39 | * decoding the COMPOUND, and call svc_reserve with this number |
40 | * at the end of nfs4svc_decode_compoundargs. |
41 | */ |
42 | |
43 | #include <linux/param.h> |
44 | #include <linux/smp.h> |
45 | #include <linux/fs.h> |
46 | #include <linux/namei.h> |
47 | #include <linux/vfs.h> |
48 | #include <linux/utsname.h> |
49 | #include <linux/sunrpc/xdr.h> |
50 | #include <linux/sunrpc/svc.h> |
51 | #include <linux/sunrpc/clnt.h> |
52 | #include <linux/nfsd/nfsd.h> |
53 | #include <linux/nfsd/state.h> |
54 | #include <linux/nfsd/xdr4.h> |
55 | #include <linux/nfsd_idmap.h> |
56 | #include <linux/nfs4.h> |
57 | #include <linux/nfs4_acl.h> |
58 | #include <linux/sunrpc/gss_api.h> |
59 | #include <linux/sunrpc/svcauth_gss.h> |
60 | |
61 | #define NFSDDBG_FACILITY NFSDDBG_XDR |
62 | |
63 | /* |
64 | * As per referral draft, the fsid for a referral MUST be different from the fsid of the containing |
65 | * directory in order to indicate to the client that a filesystem boundary is present |
66 | * We use a fixed fsid for a referral |
67 | */ |
68 | #define NFS4_REFERRAL_FSID_MAJOR 0x8000000ULL |
69 | #define NFS4_REFERRAL_FSID_MINOR 0x8000000ULL |
70 | |
71 | static __be32 |
72 | check_filename(char *str, int len, __be32 err) |
73 | { |
74 | int i; |
75 | |
76 | if (len == 0) |
77 | return nfserr_inval; |
78 | if (isdotent(str, len)) |
79 | return err; |
80 | for (i = 0; i < len; i++) |
81 | if (str[i] == '/') |
82 | return err; |
83 | return 0; |
84 | } |
85 | |
86 | #define DECODE_HEAD \ |
87 | __be32 *p; \ |
88 | __be32 status |
89 | #define DECODE_TAIL \ |
90 | status = 0; \ |
91 | out: \ |
92 | return status; \ |
93 | xdr_error: \ |
94 | dprintk("NFSD: xdr error (%s:%d)\n", \ |
95 | __FILE__, __LINE__); \ |
96 | status = nfserr_bad_xdr; \ |
97 | goto out |
98 | |
99 | #define READ32(x) (x) = ntohl(*p++) |
100 | #define READ64(x) do { \ |
101 | (x) = (u64)ntohl(*p++) << 32; \ |
102 | (x) |= ntohl(*p++); \ |
103 | } while (0) |
104 | #define READTIME(x) do { \ |
105 | p++; \ |
106 | (x) = ntohl(*p++); \ |
107 | p++; \ |
108 | } while (0) |
109 | #define READMEM(x,nbytes) do { \ |
110 | x = (char *)p; \ |
111 | p += XDR_QUADLEN(nbytes); \ |
112 | } while (0) |
113 | #define SAVEMEM(x,nbytes) do { \ |
114 | if (!(x = (p==argp->tmp || p == argp->tmpp) ? \ |
115 | savemem(argp, p, nbytes) : \ |
116 | (char *)p)) { \ |
117 | dprintk("NFSD: xdr error (%s:%d)\n", \ |
118 | __FILE__, __LINE__); \ |
119 | goto xdr_error; \ |
120 | } \ |
121 | p += XDR_QUADLEN(nbytes); \ |
122 | } while (0) |
123 | #define COPYMEM(x,nbytes) do { \ |
124 | memcpy((x), p, nbytes); \ |
125 | p += XDR_QUADLEN(nbytes); \ |
126 | } while (0) |
127 | |
128 | /* READ_BUF, read_buf(): nbytes must be <= PAGE_SIZE */ |
129 | #define READ_BUF(nbytes) do { \ |
130 | if (nbytes <= (u32)((char *)argp->end - (char *)argp->p)) { \ |
131 | p = argp->p; \ |
132 | argp->p += XDR_QUADLEN(nbytes); \ |
133 | } else if (!(p = read_buf(argp, nbytes))) { \ |
134 | dprintk("NFSD: xdr error (%s:%d)\n", \ |
135 | __FILE__, __LINE__); \ |
136 | goto xdr_error; \ |
137 | } \ |
138 | } while (0) |
139 | |
140 | static __be32 *read_buf(struct nfsd4_compoundargs *argp, u32 nbytes) |
141 | { |
142 | /* We want more bytes than seem to be available. |
143 | * Maybe we need a new page, maybe we have just run out |
144 | */ |
145 | unsigned int avail = (char *)argp->end - (char *)argp->p; |
146 | __be32 *p; |
147 | if (avail + argp->pagelen < nbytes) |
148 | return NULL; |
149 | if (avail + PAGE_SIZE < nbytes) /* need more than a page !! */ |
150 | return NULL; |
151 | /* ok, we can do it with the current plus the next page */ |
152 | if (nbytes <= sizeof(argp->tmp)) |
153 | p = argp->tmp; |
154 | else { |
155 | kfree(argp->tmpp); |
156 | p = argp->tmpp = kmalloc(nbytes, GFP_KERNEL); |
157 | if (!p) |
158 | return NULL; |
159 | |
160 | } |
161 | /* |
162 | * The following memcpy is safe because read_buf is always |
163 | * called with nbytes > avail, and the two cases above both |
164 | * guarantee p points to at least nbytes bytes. |
165 | */ |
166 | memcpy(p, argp->p, avail); |
167 | /* step to next page */ |
168 | argp->p = page_address(argp->pagelist[0]); |
169 | argp->pagelist++; |
170 | if (argp->pagelen < PAGE_SIZE) { |
171 | argp->end = p + (argp->pagelen>>2); |
172 | argp->pagelen = 0; |
173 | } else { |
174 | argp->end = p + (PAGE_SIZE>>2); |
175 | argp->pagelen -= PAGE_SIZE; |
176 | } |
177 | memcpy(((char*)p)+avail, argp->p, (nbytes - avail)); |
178 | argp->p += XDR_QUADLEN(nbytes - avail); |
179 | return p; |
180 | } |
181 | |
182 | static int zero_clientid(clientid_t *clid) |
183 | { |
184 | return (clid->cl_boot == 0) && (clid->cl_id == 0); |
185 | } |
186 | |
187 | static int |
188 | defer_free(struct nfsd4_compoundargs *argp, |
189 | void (*release)(const void *), void *p) |
190 | { |
191 | struct tmpbuf *tb; |
192 | |
193 | tb = kmalloc(sizeof(*tb), GFP_KERNEL); |
194 | if (!tb) |
195 | return -ENOMEM; |
196 | tb->buf = p; |
197 | tb->release = release; |
198 | tb->next = argp->to_free; |
199 | argp->to_free = tb; |
200 | return 0; |
201 | } |
202 | |
203 | static char *savemem(struct nfsd4_compoundargs *argp, __be32 *p, int nbytes) |
204 | { |
205 | if (p == argp->tmp) { |
206 | p = kmalloc(nbytes, GFP_KERNEL); |
207 | if (!p) |
208 | return NULL; |
209 | memcpy(p, argp->tmp, nbytes); |
210 | } else { |
211 | BUG_ON(p != argp->tmpp); |
212 | argp->tmpp = NULL; |
213 | } |
214 | if (defer_free(argp, kfree, p)) { |
215 | kfree(p); |
216 | return NULL; |
217 | } else |
218 | return (char *)p; |
219 | } |
220 | |
221 | static __be32 |
222 | nfsd4_decode_bitmap(struct nfsd4_compoundargs *argp, u32 *bmval) |
223 | { |
224 | u32 bmlen; |
225 | DECODE_HEAD; |
226 | |
227 | bmval[0] = 0; |
228 | bmval[1] = 0; |
229 | bmval[2] = 0; |
230 | |
231 | READ_BUF(4); |
232 | READ32(bmlen); |
233 | if (bmlen > 1000) |
234 | goto xdr_error; |
235 | |
236 | READ_BUF(bmlen << 2); |
237 | if (bmlen > 0) |
238 | READ32(bmval[0]); |
239 | if (bmlen > 1) |
240 | READ32(bmval[1]); |
241 | if (bmlen > 2) |
242 | READ32(bmval[2]); |
243 | |
244 | DECODE_TAIL; |
245 | } |
246 | |
247 | static __be32 |
248 | nfsd4_decode_fattr(struct nfsd4_compoundargs *argp, u32 *bmval, |
249 | struct iattr *iattr, struct nfs4_acl **acl) |
250 | { |
251 | int expected_len, len = 0; |
252 | u32 dummy32; |
253 | char *buf; |
254 | int host_err; |
255 | |
256 | DECODE_HEAD; |
257 | iattr->ia_valid = 0; |
258 | if ((status = nfsd4_decode_bitmap(argp, bmval))) |
259 | return status; |
260 | |
261 | READ_BUF(4); |
262 | READ32(expected_len); |
263 | |
264 | if (bmval[0] & FATTR4_WORD0_SIZE) { |
265 | READ_BUF(8); |
266 | len += 8; |
267 | READ64(iattr->ia_size); |
268 | iattr->ia_valid |= ATTR_SIZE; |
269 | } |
270 | if (bmval[0] & FATTR4_WORD0_ACL) { |
271 | int nace; |
272 | struct nfs4_ace *ace; |
273 | |
274 | READ_BUF(4); len += 4; |
275 | READ32(nace); |
276 | |
277 | if (nace > NFS4_ACL_MAX) |
278 | return nfserr_resource; |
279 | |
280 | *acl = nfs4_acl_new(nace); |
281 | if (*acl == NULL) { |
282 | host_err = -ENOMEM; |
283 | goto out_nfserr; |
284 | } |
285 | defer_free(argp, kfree, *acl); |
286 | |
287 | (*acl)->naces = nace; |
288 | for (ace = (*acl)->aces; ace < (*acl)->aces + nace; ace++) { |
289 | READ_BUF(16); len += 16; |
290 | READ32(ace->type); |
291 | READ32(ace->flag); |
292 | READ32(ace->access_mask); |
293 | READ32(dummy32); |
294 | READ_BUF(dummy32); |
295 | len += XDR_QUADLEN(dummy32) << 2; |
296 | READMEM(buf, dummy32); |
297 | ace->whotype = nfs4_acl_get_whotype(buf, dummy32); |
298 | host_err = 0; |
299 | if (ace->whotype != NFS4_ACL_WHO_NAMED) |
300 | ace->who = 0; |
301 | else if (ace->flag & NFS4_ACE_IDENTIFIER_GROUP) |
302 | host_err = nfsd_map_name_to_gid(argp->rqstp, |
303 | buf, dummy32, &ace->who); |
304 | else |
305 | host_err = nfsd_map_name_to_uid(argp->rqstp, |
306 | buf, dummy32, &ace->who); |
307 | if (host_err) |
308 | goto out_nfserr; |
309 | } |
310 | } else |
311 | *acl = NULL; |
312 | if (bmval[1] & FATTR4_WORD1_MODE) { |
313 | READ_BUF(4); |
314 | len += 4; |
315 | READ32(iattr->ia_mode); |
316 | iattr->ia_mode &= (S_IFMT | S_IALLUGO); |
317 | iattr->ia_valid |= ATTR_MODE; |
318 | } |
319 | if (bmval[1] & FATTR4_WORD1_OWNER) { |
320 | READ_BUF(4); |
321 | len += 4; |
322 | READ32(dummy32); |
323 | READ_BUF(dummy32); |
324 | len += (XDR_QUADLEN(dummy32) << 2); |
325 | READMEM(buf, dummy32); |
326 | if ((host_err = nfsd_map_name_to_uid(argp->rqstp, buf, dummy32, &iattr->ia_uid))) |
327 | goto out_nfserr; |
328 | iattr->ia_valid |= ATTR_UID; |
329 | } |
330 | if (bmval[1] & FATTR4_WORD1_OWNER_GROUP) { |
331 | READ_BUF(4); |
332 | len += 4; |
333 | READ32(dummy32); |
334 | READ_BUF(dummy32); |
335 | len += (XDR_QUADLEN(dummy32) << 2); |
336 | READMEM(buf, dummy32); |
337 | if ((host_err = nfsd_map_name_to_gid(argp->rqstp, buf, dummy32, &iattr->ia_gid))) |
338 | goto out_nfserr; |
339 | iattr->ia_valid |= ATTR_GID; |
340 | } |
341 | if (bmval[1] & FATTR4_WORD1_TIME_ACCESS_SET) { |
342 | READ_BUF(4); |
343 | len += 4; |
344 | READ32(dummy32); |
345 | switch (dummy32) { |
346 | case NFS4_SET_TO_CLIENT_TIME: |
347 | /* We require the high 32 bits of 'seconds' to be 0, and we ignore |
348 | all 32 bits of 'nseconds'. */ |
349 | READ_BUF(12); |
350 | len += 12; |
351 | READ32(dummy32); |
352 | if (dummy32) |
353 | return nfserr_inval; |
354 | READ32(iattr->ia_atime.tv_sec); |
355 | READ32(iattr->ia_atime.tv_nsec); |
356 | if (iattr->ia_atime.tv_nsec >= (u32)1000000000) |
357 | return nfserr_inval; |
358 | iattr->ia_valid |= (ATTR_ATIME | ATTR_ATIME_SET); |
359 | break; |
360 | case NFS4_SET_TO_SERVER_TIME: |
361 | iattr->ia_valid |= ATTR_ATIME; |
362 | break; |
363 | default: |
364 | goto xdr_error; |
365 | } |
366 | } |
367 | if (bmval[1] & FATTR4_WORD1_TIME_MODIFY_SET) { |
368 | READ_BUF(4); |
369 | len += 4; |
370 | READ32(dummy32); |
371 | switch (dummy32) { |
372 | case NFS4_SET_TO_CLIENT_TIME: |
373 | /* We require the high 32 bits of 'seconds' to be 0, and we ignore |
374 | all 32 bits of 'nseconds'. */ |
375 | READ_BUF(12); |
376 | len += 12; |
377 | READ32(dummy32); |
378 | if (dummy32) |
379 | return nfserr_inval; |
380 | READ32(iattr->ia_mtime.tv_sec); |
381 | READ32(iattr->ia_mtime.tv_nsec); |
382 | if (iattr->ia_mtime.tv_nsec >= (u32)1000000000) |
383 | return nfserr_inval; |
384 | iattr->ia_valid |= (ATTR_MTIME | ATTR_MTIME_SET); |
385 | break; |
386 | case NFS4_SET_TO_SERVER_TIME: |
387 | iattr->ia_valid |= ATTR_MTIME; |
388 | break; |
389 | default: |
390 | goto xdr_error; |
391 | } |
392 | } |
393 | if (bmval[0] & ~NFSD_WRITEABLE_ATTRS_WORD0 |
394 | || bmval[1] & ~NFSD_WRITEABLE_ATTRS_WORD1 |
395 | || bmval[2] & ~NFSD_WRITEABLE_ATTRS_WORD2) |
396 | READ_BUF(expected_len - len); |
397 | else if (len != expected_len) |
398 | goto xdr_error; |
399 | |
400 | DECODE_TAIL; |
401 | |
402 | out_nfserr: |
403 | status = nfserrno(host_err); |
404 | goto out; |
405 | } |
406 | |
407 | static __be32 |
408 | nfsd4_decode_stateid(struct nfsd4_compoundargs *argp, stateid_t *sid) |
409 | { |
410 | DECODE_HEAD; |
411 | |
412 | READ_BUF(sizeof(stateid_t)); |
413 | READ32(sid->si_generation); |
414 | COPYMEM(&sid->si_opaque, sizeof(stateid_opaque_t)); |
415 | |
416 | DECODE_TAIL; |
417 | } |
418 | |
419 | static __be32 |
420 | nfsd4_decode_access(struct nfsd4_compoundargs *argp, struct nfsd4_access *access) |
421 | { |
422 | DECODE_HEAD; |
423 | |
424 | READ_BUF(4); |
425 | READ32(access->ac_req_access); |
426 | |
427 | DECODE_TAIL; |
428 | } |
429 | |
430 | static __be32 |
431 | nfsd4_decode_close(struct nfsd4_compoundargs *argp, struct nfsd4_close *close) |
432 | { |
433 | DECODE_HEAD; |
434 | |
435 | close->cl_stateowner = NULL; |
436 | READ_BUF(4); |
437 | READ32(close->cl_seqid); |
438 | return nfsd4_decode_stateid(argp, &close->cl_stateid); |
439 | |
440 | DECODE_TAIL; |
441 | } |
442 | |
443 | |
444 | static __be32 |
445 | nfsd4_decode_commit(struct nfsd4_compoundargs *argp, struct nfsd4_commit *commit) |
446 | { |
447 | DECODE_HEAD; |
448 | |
449 | READ_BUF(12); |
450 | READ64(commit->co_offset); |
451 | READ32(commit->co_count); |
452 | |
453 | DECODE_TAIL; |
454 | } |
455 | |
456 | static __be32 |
457 | nfsd4_decode_create(struct nfsd4_compoundargs *argp, struct nfsd4_create *create) |
458 | { |
459 | DECODE_HEAD; |
460 | |
461 | READ_BUF(4); |
462 | READ32(create->cr_type); |
463 | switch (create->cr_type) { |
464 | case NF4LNK: |
465 | READ_BUF(4); |
466 | READ32(create->cr_linklen); |
467 | READ_BUF(create->cr_linklen); |
468 | SAVEMEM(create->cr_linkname, create->cr_linklen); |
469 | break; |
470 | case NF4BLK: |
471 | case NF4CHR: |
472 | READ_BUF(8); |
473 | READ32(create->cr_specdata1); |
474 | READ32(create->cr_specdata2); |
475 | break; |
476 | case NF4SOCK: |
477 | case NF4FIFO: |
478 | case NF4DIR: |
479 | default: |
480 | break; |
481 | } |
482 | |
483 | READ_BUF(4); |
484 | READ32(create->cr_namelen); |
485 | READ_BUF(create->cr_namelen); |
486 | SAVEMEM(create->cr_name, create->cr_namelen); |
487 | if ((status = check_filename(create->cr_name, create->cr_namelen, nfserr_inval))) |
488 | return status; |
489 | |
490 | status = nfsd4_decode_fattr(argp, create->cr_bmval, &create->cr_iattr, |
491 | &create->cr_acl); |
492 | if (status) |
493 | goto out; |
494 | |
495 | DECODE_TAIL; |
496 | } |
497 | |
498 | static inline __be32 |
499 | nfsd4_decode_delegreturn(struct nfsd4_compoundargs *argp, struct nfsd4_delegreturn *dr) |
500 | { |
501 | return nfsd4_decode_stateid(argp, &dr->dr_stateid); |
502 | } |
503 | |
504 | static inline __be32 |
505 | nfsd4_decode_getattr(struct nfsd4_compoundargs *argp, struct nfsd4_getattr *getattr) |
506 | { |
507 | return nfsd4_decode_bitmap(argp, getattr->ga_bmval); |
508 | } |
509 | |
510 | static __be32 |
511 | nfsd4_decode_link(struct nfsd4_compoundargs *argp, struct nfsd4_link *link) |
512 | { |
513 | DECODE_HEAD; |
514 | |
515 | READ_BUF(4); |
516 | READ32(link->li_namelen); |
517 | READ_BUF(link->li_namelen); |
518 | SAVEMEM(link->li_name, link->li_namelen); |
519 | if ((status = check_filename(link->li_name, link->li_namelen, nfserr_inval))) |
520 | return status; |
521 | |
522 | DECODE_TAIL; |
523 | } |
524 | |
525 | static __be32 |
526 | nfsd4_decode_lock(struct nfsd4_compoundargs *argp, struct nfsd4_lock *lock) |
527 | { |
528 | DECODE_HEAD; |
529 | |
530 | lock->lk_replay_owner = NULL; |
531 | /* |
532 | * type, reclaim(boolean), offset, length, new_lock_owner(boolean) |
533 | */ |
534 | READ_BUF(28); |
535 | READ32(lock->lk_type); |
536 | if ((lock->lk_type < NFS4_READ_LT) || (lock->lk_type > NFS4_WRITEW_LT)) |
537 | goto xdr_error; |
538 | READ32(lock->lk_reclaim); |
539 | READ64(lock->lk_offset); |
540 | READ64(lock->lk_length); |
541 | READ32(lock->lk_is_new); |
542 | |
543 | if (lock->lk_is_new) { |
544 | READ_BUF(4); |
545 | READ32(lock->lk_new_open_seqid); |
546 | status = nfsd4_decode_stateid(argp, &lock->lk_new_open_stateid); |
547 | if (status) |
548 | return status; |
549 | READ_BUF(8 + sizeof(clientid_t)); |
550 | READ32(lock->lk_new_lock_seqid); |
551 | COPYMEM(&lock->lk_new_clientid, sizeof(clientid_t)); |
552 | READ32(lock->lk_new_owner.len); |
553 | READ_BUF(lock->lk_new_owner.len); |
554 | READMEM(lock->lk_new_owner.data, lock->lk_new_owner.len); |
555 | } else { |
556 | status = nfsd4_decode_stateid(argp, &lock->lk_old_lock_stateid); |
557 | if (status) |
558 | return status; |
559 | READ_BUF(4); |
560 | READ32(lock->lk_old_lock_seqid); |
561 | } |
562 | |
563 | DECODE_TAIL; |
564 | } |
565 | |
566 | static __be32 |
567 | nfsd4_decode_lockt(struct nfsd4_compoundargs *argp, struct nfsd4_lockt *lockt) |
568 | { |
569 | DECODE_HEAD; |
570 | |
571 | READ_BUF(32); |
572 | READ32(lockt->lt_type); |
573 | if((lockt->lt_type < NFS4_READ_LT) || (lockt->lt_type > NFS4_WRITEW_LT)) |
574 | goto xdr_error; |
575 | READ64(lockt->lt_offset); |
576 | READ64(lockt->lt_length); |
577 | COPYMEM(&lockt->lt_clientid, 8); |
578 | READ32(lockt->lt_owner.len); |
579 | READ_BUF(lockt->lt_owner.len); |
580 | READMEM(lockt->lt_owner.data, lockt->lt_owner.len); |
581 | |
582 | if (argp->minorversion && !zero_clientid(&lockt->lt_clientid)) |
583 | return nfserr_inval; |
584 | DECODE_TAIL; |
585 | } |
586 | |
587 | static __be32 |
588 | nfsd4_decode_locku(struct nfsd4_compoundargs *argp, struct nfsd4_locku *locku) |
589 | { |
590 | DECODE_HEAD; |
591 | |
592 | locku->lu_stateowner = NULL; |
593 | READ_BUF(8); |
594 | READ32(locku->lu_type); |
595 | if ((locku->lu_type < NFS4_READ_LT) || (locku->lu_type > NFS4_WRITEW_LT)) |
596 | goto xdr_error; |
597 | READ32(locku->lu_seqid); |
598 | status = nfsd4_decode_stateid(argp, &locku->lu_stateid); |
599 | if (status) |
600 | return status; |
601 | READ_BUF(16); |
602 | READ64(locku->lu_offset); |
603 | READ64(locku->lu_length); |
604 | |
605 | DECODE_TAIL; |
606 | } |
607 | |
608 | static __be32 |
609 | nfsd4_decode_lookup(struct nfsd4_compoundargs *argp, struct nfsd4_lookup *lookup) |
610 | { |
611 | DECODE_HEAD; |
612 | |
613 | READ_BUF(4); |
614 | READ32(lookup->lo_len); |
615 | READ_BUF(lookup->lo_len); |
616 | SAVEMEM(lookup->lo_name, lookup->lo_len); |
617 | if ((status = check_filename(lookup->lo_name, lookup->lo_len, nfserr_noent))) |
618 | return status; |
619 | |
620 | DECODE_TAIL; |
621 | } |
622 | |
623 | static __be32 |
624 | nfsd4_decode_open(struct nfsd4_compoundargs *argp, struct nfsd4_open *open) |
625 | { |
626 | DECODE_HEAD; |
627 | |
628 | memset(open->op_bmval, 0, sizeof(open->op_bmval)); |
629 | open->op_iattr.ia_valid = 0; |
630 | open->op_stateowner = NULL; |
631 | |
632 | /* seqid, share_access, share_deny, clientid, ownerlen */ |
633 | READ_BUF(16 + sizeof(clientid_t)); |
634 | READ32(open->op_seqid); |
635 | READ32(open->op_share_access); |
636 | READ32(open->op_share_deny); |
637 | COPYMEM(&open->op_clientid, sizeof(clientid_t)); |
638 | READ32(open->op_owner.len); |
639 | |
640 | /* owner, open_flag */ |
641 | READ_BUF(open->op_owner.len + 4); |
642 | SAVEMEM(open->op_owner.data, open->op_owner.len); |
643 | READ32(open->op_create); |
644 | switch (open->op_create) { |
645 | case NFS4_OPEN_NOCREATE: |
646 | break; |
647 | case NFS4_OPEN_CREATE: |
648 | READ_BUF(4); |
649 | READ32(open->op_createmode); |
650 | switch (open->op_createmode) { |
651 | case NFS4_CREATE_UNCHECKED: |
652 | case NFS4_CREATE_GUARDED: |
653 | status = nfsd4_decode_fattr(argp, open->op_bmval, |
654 | &open->op_iattr, &open->op_acl); |
655 | if (status) |
656 | goto out; |
657 | break; |
658 | case NFS4_CREATE_EXCLUSIVE: |
659 | READ_BUF(8); |
660 | COPYMEM(open->op_verf.data, 8); |
661 | break; |
662 | case NFS4_CREATE_EXCLUSIVE4_1: |
663 | if (argp->minorversion < 1) |
664 | goto xdr_error; |
665 | READ_BUF(8); |
666 | COPYMEM(open->op_verf.data, 8); |
667 | status = nfsd4_decode_fattr(argp, open->op_bmval, |
668 | &open->op_iattr, &open->op_acl); |
669 | if (status) |
670 | goto out; |
671 | break; |
672 | default: |
673 | goto xdr_error; |
674 | } |
675 | break; |
676 | default: |
677 | goto xdr_error; |
678 | } |
679 | |
680 | /* open_claim */ |
681 | READ_BUF(4); |
682 | READ32(open->op_claim_type); |
683 | switch (open->op_claim_type) { |
684 | case NFS4_OPEN_CLAIM_NULL: |
685 | case NFS4_OPEN_CLAIM_DELEGATE_PREV: |
686 | READ_BUF(4); |
687 | READ32(open->op_fname.len); |
688 | READ_BUF(open->op_fname.len); |
689 | SAVEMEM(open->op_fname.data, open->op_fname.len); |
690 | if ((status = check_filename(open->op_fname.data, open->op_fname.len, nfserr_inval))) |
691 | return status; |
692 | break; |
693 | case NFS4_OPEN_CLAIM_PREVIOUS: |
694 | READ_BUF(4); |
695 | READ32(open->op_delegate_type); |
696 | break; |
697 | case NFS4_OPEN_CLAIM_DELEGATE_CUR: |
698 | status = nfsd4_decode_stateid(argp, &open->op_delegate_stateid); |
699 | if (status) |
700 | return status; |
701 | READ_BUF(4); |
702 | READ32(open->op_fname.len); |
703 | READ_BUF(open->op_fname.len); |
704 | SAVEMEM(open->op_fname.data, open->op_fname.len); |
705 | if ((status = check_filename(open->op_fname.data, open->op_fname.len, nfserr_inval))) |
706 | return status; |
707 | break; |
708 | default: |
709 | goto xdr_error; |
710 | } |
711 | |
712 | DECODE_TAIL; |
713 | } |
714 | |
715 | static __be32 |
716 | nfsd4_decode_open_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_open_confirm *open_conf) |
717 | { |
718 | DECODE_HEAD; |
719 | |
720 | open_conf->oc_stateowner = NULL; |
721 | status = nfsd4_decode_stateid(argp, &open_conf->oc_req_stateid); |
722 | if (status) |
723 | return status; |
724 | READ_BUF(4); |
725 | READ32(open_conf->oc_seqid); |
726 | |
727 | DECODE_TAIL; |
728 | } |
729 | |
730 | static __be32 |
731 | nfsd4_decode_open_downgrade(struct nfsd4_compoundargs *argp, struct nfsd4_open_downgrade *open_down) |
732 | { |
733 | DECODE_HEAD; |
734 | |
735 | open_down->od_stateowner = NULL; |
736 | status = nfsd4_decode_stateid(argp, &open_down->od_stateid); |
737 | if (status) |
738 | return status; |
739 | READ_BUF(12); |
740 | READ32(open_down->od_seqid); |
741 | READ32(open_down->od_share_access); |
742 | READ32(open_down->od_share_deny); |
743 | |
744 | DECODE_TAIL; |
745 | } |
746 | |
747 | static __be32 |
748 | nfsd4_decode_putfh(struct nfsd4_compoundargs *argp, struct nfsd4_putfh *putfh) |
749 | { |
750 | DECODE_HEAD; |
751 | |
752 | READ_BUF(4); |
753 | READ32(putfh->pf_fhlen); |
754 | if (putfh->pf_fhlen > NFS4_FHSIZE) |
755 | goto xdr_error; |
756 | READ_BUF(putfh->pf_fhlen); |
757 | SAVEMEM(putfh->pf_fhval, putfh->pf_fhlen); |
758 | |
759 | DECODE_TAIL; |
760 | } |
761 | |
762 | static __be32 |
763 | nfsd4_decode_read(struct nfsd4_compoundargs *argp, struct nfsd4_read *read) |
764 | { |
765 | DECODE_HEAD; |
766 | |
767 | status = nfsd4_decode_stateid(argp, &read->rd_stateid); |
768 | if (status) |
769 | return status; |
770 | READ_BUF(12); |
771 | READ64(read->rd_offset); |
772 | READ32(read->rd_length); |
773 | |
774 | DECODE_TAIL; |
775 | } |
776 | |
777 | static __be32 |
778 | nfsd4_decode_readdir(struct nfsd4_compoundargs *argp, struct nfsd4_readdir *readdir) |
779 | { |
780 | DECODE_HEAD; |
781 | |
782 | READ_BUF(24); |
783 | READ64(readdir->rd_cookie); |
784 | COPYMEM(readdir->rd_verf.data, sizeof(readdir->rd_verf.data)); |
785 | READ32(readdir->rd_dircount); /* just in case you needed a useless field... */ |
786 | READ32(readdir->rd_maxcount); |
787 | if ((status = nfsd4_decode_bitmap(argp, readdir->rd_bmval))) |
788 | goto out; |
789 | |
790 | DECODE_TAIL; |
791 | } |
792 | |
793 | static __be32 |
794 | nfsd4_decode_remove(struct nfsd4_compoundargs *argp, struct nfsd4_remove *remove) |
795 | { |
796 | DECODE_HEAD; |
797 | |
798 | READ_BUF(4); |
799 | READ32(remove->rm_namelen); |
800 | READ_BUF(remove->rm_namelen); |
801 | SAVEMEM(remove->rm_name, remove->rm_namelen); |
802 | if ((status = check_filename(remove->rm_name, remove->rm_namelen, nfserr_noent))) |
803 | return status; |
804 | |
805 | DECODE_TAIL; |
806 | } |
807 | |
808 | static __be32 |
809 | nfsd4_decode_rename(struct nfsd4_compoundargs *argp, struct nfsd4_rename *rename) |
810 | { |
811 | DECODE_HEAD; |
812 | |
813 | READ_BUF(4); |
814 | READ32(rename->rn_snamelen); |
815 | READ_BUF(rename->rn_snamelen + 4); |
816 | SAVEMEM(rename->rn_sname, rename->rn_snamelen); |
817 | READ32(rename->rn_tnamelen); |
818 | READ_BUF(rename->rn_tnamelen); |
819 | SAVEMEM(rename->rn_tname, rename->rn_tnamelen); |
820 | if ((status = check_filename(rename->rn_sname, rename->rn_snamelen, nfserr_noent))) |
821 | return status; |
822 | if ((status = check_filename(rename->rn_tname, rename->rn_tnamelen, nfserr_inval))) |
823 | return status; |
824 | |
825 | DECODE_TAIL; |
826 | } |
827 | |
828 | static __be32 |
829 | nfsd4_decode_renew(struct nfsd4_compoundargs *argp, clientid_t *clientid) |
830 | { |
831 | DECODE_HEAD; |
832 | |
833 | READ_BUF(sizeof(clientid_t)); |
834 | COPYMEM(clientid, sizeof(clientid_t)); |
835 | |
836 | DECODE_TAIL; |
837 | } |
838 | |
839 | static __be32 |
840 | nfsd4_decode_secinfo(struct nfsd4_compoundargs *argp, |
841 | struct nfsd4_secinfo *secinfo) |
842 | { |
843 | DECODE_HEAD; |
844 | |
845 | READ_BUF(4); |
846 | READ32(secinfo->si_namelen); |
847 | READ_BUF(secinfo->si_namelen); |
848 | SAVEMEM(secinfo->si_name, secinfo->si_namelen); |
849 | status = check_filename(secinfo->si_name, secinfo->si_namelen, |
850 | nfserr_noent); |
851 | if (status) |
852 | return status; |
853 | DECODE_TAIL; |
854 | } |
855 | |
856 | static __be32 |
857 | nfsd4_decode_setattr(struct nfsd4_compoundargs *argp, struct nfsd4_setattr *setattr) |
858 | { |
859 | __be32 status; |
860 | |
861 | status = nfsd4_decode_stateid(argp, &setattr->sa_stateid); |
862 | if (status) |
863 | return status; |
864 | return nfsd4_decode_fattr(argp, setattr->sa_bmval, &setattr->sa_iattr, |
865 | &setattr->sa_acl); |
866 | } |
867 | |
868 | static __be32 |
869 | nfsd4_decode_setclientid(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid *setclientid) |
870 | { |
871 | DECODE_HEAD; |
872 | |
873 | READ_BUF(12); |
874 | COPYMEM(setclientid->se_verf.data, 8); |
875 | READ32(setclientid->se_namelen); |
876 | |
877 | READ_BUF(setclientid->se_namelen + 8); |
878 | SAVEMEM(setclientid->se_name, setclientid->se_namelen); |
879 | READ32(setclientid->se_callback_prog); |
880 | READ32(setclientid->se_callback_netid_len); |
881 | |
882 | READ_BUF(setclientid->se_callback_netid_len + 4); |
883 | SAVEMEM(setclientid->se_callback_netid_val, setclientid->se_callback_netid_len); |
884 | READ32(setclientid->se_callback_addr_len); |
885 | |
886 | READ_BUF(setclientid->se_callback_addr_len + 4); |
887 | SAVEMEM(setclientid->se_callback_addr_val, setclientid->se_callback_addr_len); |
888 | READ32(setclientid->se_callback_ident); |
889 | |
890 | DECODE_TAIL; |
891 | } |
892 | |
893 | static __be32 |
894 | nfsd4_decode_setclientid_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid_confirm *scd_c) |
895 | { |
896 | DECODE_HEAD; |
897 | |
898 | READ_BUF(8 + sizeof(nfs4_verifier)); |
899 | COPYMEM(&scd_c->sc_clientid, 8); |
900 | COPYMEM(&scd_c->sc_confirm, sizeof(nfs4_verifier)); |
901 | |
902 | DECODE_TAIL; |
903 | } |
904 | |
905 | /* Also used for NVERIFY */ |
906 | static __be32 |
907 | nfsd4_decode_verify(struct nfsd4_compoundargs *argp, struct nfsd4_verify *verify) |
908 | { |
909 | #if 0 |
910 | struct nfsd4_compoundargs save = { |
911 | .p = argp->p, |
912 | .end = argp->end, |
913 | .rqstp = argp->rqstp, |
914 | }; |
915 | u32 ve_bmval[2]; |
916 | struct iattr ve_iattr; /* request */ |
917 | struct nfs4_acl *ve_acl; /* request */ |
918 | #endif |
919 | DECODE_HEAD; |
920 | |
921 | if ((status = nfsd4_decode_bitmap(argp, verify->ve_bmval))) |
922 | goto out; |
923 | |
924 | /* For convenience's sake, we compare raw xdr'd attributes in |
925 | * nfsd4_proc_verify; however we still decode here just to return |
926 | * correct error in case of bad xdr. */ |
927 | #if 0 |
928 | status = nfsd4_decode_fattr(ve_bmval, &ve_iattr, &ve_acl); |
929 | if (status == nfserr_inval) { |
930 | status = nfserrno(status); |
931 | goto out; |
932 | } |
933 | #endif |
934 | READ_BUF(4); |
935 | READ32(verify->ve_attrlen); |
936 | READ_BUF(verify->ve_attrlen); |
937 | SAVEMEM(verify->ve_attrval, verify->ve_attrlen); |
938 | |
939 | DECODE_TAIL; |
940 | } |
941 | |
942 | static __be32 |
943 | nfsd4_decode_write(struct nfsd4_compoundargs *argp, struct nfsd4_write *write) |
944 | { |
945 | int avail; |
946 | int v; |
947 | int len; |
948 | DECODE_HEAD; |
949 | |
950 | status = nfsd4_decode_stateid(argp, &write->wr_stateid); |
951 | if (status) |
952 | return status; |
953 | READ_BUF(16); |
954 | READ64(write->wr_offset); |
955 | READ32(write->wr_stable_how); |
956 | if (write->wr_stable_how > 2) |
957 | goto xdr_error; |
958 | READ32(write->wr_buflen); |
959 | |
960 | /* Sorry .. no magic macros for this.. * |
961 | * READ_BUF(write->wr_buflen); |
962 | * SAVEMEM(write->wr_buf, write->wr_buflen); |
963 | */ |
964 | avail = (char*)argp->end - (char*)argp->p; |
965 | if (avail + argp->pagelen < write->wr_buflen) { |
966 | dprintk("NFSD: xdr error (%s:%d)\n", |
967 | __FILE__, __LINE__); |
968 | goto xdr_error; |
969 | } |
970 | argp->rqstp->rq_vec[0].iov_base = p; |
971 | argp->rqstp->rq_vec[0].iov_len = avail; |
972 | v = 0; |
973 | len = write->wr_buflen; |
974 | while (len > argp->rqstp->rq_vec[v].iov_len) { |
975 | len -= argp->rqstp->rq_vec[v].iov_len; |
976 | v++; |
977 | argp->rqstp->rq_vec[v].iov_base = page_address(argp->pagelist[0]); |
978 | argp->pagelist++; |
979 | if (argp->pagelen >= PAGE_SIZE) { |
980 | argp->rqstp->rq_vec[v].iov_len = PAGE_SIZE; |
981 | argp->pagelen -= PAGE_SIZE; |
982 | } else { |
983 | argp->rqstp->rq_vec[v].iov_len = argp->pagelen; |
984 | argp->pagelen -= len; |
985 | } |
986 | } |
987 | argp->end = (__be32*) (argp->rqstp->rq_vec[v].iov_base + argp->rqstp->rq_vec[v].iov_len); |
988 | argp->p = (__be32*) (argp->rqstp->rq_vec[v].iov_base + (XDR_QUADLEN(len) << 2)); |
989 | argp->rqstp->rq_vec[v].iov_len = len; |
990 | write->wr_vlen = v+1; |
991 | |
992 | DECODE_TAIL; |
993 | } |
994 | |
995 | static __be32 |
996 | nfsd4_decode_release_lockowner(struct nfsd4_compoundargs *argp, struct nfsd4_release_lockowner *rlockowner) |
997 | { |
998 | DECODE_HEAD; |
999 | |
1000 | READ_BUF(12); |
1001 | COPYMEM(&rlockowner->rl_clientid, sizeof(clientid_t)); |
1002 | READ32(rlockowner->rl_owner.len); |
1003 | READ_BUF(rlockowner->rl_owner.len); |
1004 | READMEM(rlockowner->rl_owner.data, rlockowner->rl_owner.len); |
1005 | |
1006 | if (argp->minorversion && !zero_clientid(&rlockowner->rl_clientid)) |
1007 | return nfserr_inval; |
1008 | DECODE_TAIL; |
1009 | } |
1010 | |
1011 | static __be32 |
1012 | nfsd4_decode_exchange_id(struct nfsd4_compoundargs *argp, |
1013 | struct nfsd4_exchange_id *exid) |
1014 | { |
1015 | int dummy; |
1016 | DECODE_HEAD; |
1017 | |
1018 | READ_BUF(NFS4_VERIFIER_SIZE); |
1019 | COPYMEM(exid->verifier.data, NFS4_VERIFIER_SIZE); |
1020 | |
1021 | READ_BUF(4); |
1022 | READ32(exid->clname.len); |
1023 | |
1024 | READ_BUF(exid->clname.len); |
1025 | SAVEMEM(exid->clname.data, exid->clname.len); |
1026 | |
1027 | READ_BUF(4); |
1028 | READ32(exid->flags); |
1029 | |
1030 | /* Ignore state_protect4_a */ |
1031 | READ_BUF(4); |
1032 | READ32(exid->spa_how); |
1033 | switch (exid->spa_how) { |
1034 | case SP4_NONE: |
1035 | break; |
1036 | case SP4_MACH_CRED: |
1037 | /* spo_must_enforce */ |
1038 | READ_BUF(4); |
1039 | READ32(dummy); |
1040 | READ_BUF(dummy * 4); |
1041 | p += dummy; |
1042 | |
1043 | /* spo_must_allow */ |
1044 | READ_BUF(4); |
1045 | READ32(dummy); |
1046 | READ_BUF(dummy * 4); |
1047 | p += dummy; |
1048 | break; |
1049 | case SP4_SSV: |
1050 | /* ssp_ops */ |
1051 | READ_BUF(4); |
1052 | READ32(dummy); |
1053 | READ_BUF(dummy * 4); |
1054 | p += dummy; |
1055 | |
1056 | READ_BUF(4); |
1057 | READ32(dummy); |
1058 | READ_BUF(dummy * 4); |
1059 | p += dummy; |
1060 | |
1061 | /* ssp_hash_algs<> */ |
1062 | READ_BUF(4); |
1063 | READ32(dummy); |
1064 | READ_BUF(dummy); |
1065 | p += XDR_QUADLEN(dummy); |
1066 | |
1067 | /* ssp_encr_algs<> */ |
1068 | READ_BUF(4); |
1069 | READ32(dummy); |
1070 | READ_BUF(dummy); |
1071 | p += XDR_QUADLEN(dummy); |
1072 | |
1073 | /* ssp_window and ssp_num_gss_handles */ |
1074 | READ_BUF(8); |
1075 | READ32(dummy); |
1076 | READ32(dummy); |
1077 | break; |
1078 | default: |
1079 | goto xdr_error; |
1080 | } |
1081 | |
1082 | /* Ignore Implementation ID */ |
1083 | READ_BUF(4); /* nfs_impl_id4 array length */ |
1084 | READ32(dummy); |
1085 | |
1086 | if (dummy > 1) |
1087 | goto xdr_error; |
1088 | |
1089 | if (dummy == 1) { |
1090 | /* nii_domain */ |
1091 | READ_BUF(4); |
1092 | READ32(dummy); |
1093 | READ_BUF(dummy); |
1094 | p += XDR_QUADLEN(dummy); |
1095 | |
1096 | /* nii_name */ |
1097 | READ_BUF(4); |
1098 | READ32(dummy); |
1099 | READ_BUF(dummy); |
1100 | p += XDR_QUADLEN(dummy); |
1101 | |
1102 | /* nii_date */ |
1103 | READ_BUF(12); |
1104 | p += 3; |
1105 | } |
1106 | DECODE_TAIL; |
1107 | } |
1108 | |
1109 | static __be32 |
1110 | nfsd4_decode_create_session(struct nfsd4_compoundargs *argp, |
1111 | struct nfsd4_create_session *sess) |
1112 | { |
1113 | DECODE_HEAD; |
1114 | |
1115 | u32 dummy; |
1116 | char *machine_name; |
1117 | int i; |
1118 | int nr_secflavs; |
1119 | |
1120 | READ_BUF(16); |
1121 | COPYMEM(&sess->clientid, 8); |
1122 | READ32(sess->seqid); |
1123 | READ32(sess->flags); |
1124 | |
1125 | /* Fore channel attrs */ |
1126 | READ_BUF(28); |
1127 | READ32(dummy); /* headerpadsz is always 0 */ |
1128 | READ32(sess->fore_channel.maxreq_sz); |
1129 | READ32(sess->fore_channel.maxresp_sz); |
1130 | READ32(sess->fore_channel.maxresp_cached); |
1131 | READ32(sess->fore_channel.maxops); |
1132 | READ32(sess->fore_channel.maxreqs); |
1133 | READ32(sess->fore_channel.nr_rdma_attrs); |
1134 | if (sess->fore_channel.nr_rdma_attrs == 1) { |
1135 | READ_BUF(4); |
1136 | READ32(sess->fore_channel.rdma_attrs); |
1137 | } else if (sess->fore_channel.nr_rdma_attrs > 1) { |
1138 | dprintk("Too many fore channel attr bitmaps!\n"); |
1139 | goto xdr_error; |
1140 | } |
1141 | |
1142 | /* Back channel attrs */ |
1143 | READ_BUF(28); |
1144 | READ32(dummy); /* headerpadsz is always 0 */ |
1145 | READ32(sess->back_channel.maxreq_sz); |
1146 | READ32(sess->back_channel.maxresp_sz); |
1147 | READ32(sess->back_channel.maxresp_cached); |
1148 | READ32(sess->back_channel.maxops); |
1149 | READ32(sess->back_channel.maxreqs); |
1150 | READ32(sess->back_channel.nr_rdma_attrs); |
1151 | if (sess->back_channel.nr_rdma_attrs == 1) { |
1152 | READ_BUF(4); |
1153 | READ32(sess->back_channel.rdma_attrs); |
1154 | } else if (sess->back_channel.nr_rdma_attrs > 1) { |
1155 | dprintk("Too many back channel attr bitmaps!\n"); |
1156 | goto xdr_error; |
1157 | } |
1158 | |
1159 | READ_BUF(8); |
1160 | READ32(sess->callback_prog); |
1161 | |
1162 | /* callback_sec_params4 */ |
1163 | READ32(nr_secflavs); |
1164 | for (i = 0; i < nr_secflavs; ++i) { |
1165 | READ_BUF(4); |
1166 | READ32(dummy); |
1167 | switch (dummy) { |
1168 | case RPC_AUTH_NULL: |
1169 | /* Nothing to read */ |
1170 | break; |
1171 | case RPC_AUTH_UNIX: |
1172 | READ_BUF(8); |
1173 | /* stamp */ |
1174 | READ32(dummy); |
1175 | |
1176 | /* machine name */ |
1177 | READ32(dummy); |
1178 | READ_BUF(dummy); |
1179 | SAVEMEM(machine_name, dummy); |
1180 | |
1181 | /* uid, gid */ |
1182 | READ_BUF(8); |
1183 | READ32(sess->uid); |
1184 | READ32(sess->gid); |
1185 | |
1186 | /* more gids */ |
1187 | READ_BUF(4); |
1188 | READ32(dummy); |
1189 | READ_BUF(dummy * 4); |
1190 | for (i = 0; i < dummy; ++i) |
1191 | READ32(dummy); |
1192 | break; |
1193 | case RPC_AUTH_GSS: |
1194 | dprintk("RPC_AUTH_GSS callback secflavor " |
1195 | "not supported!\n"); |
1196 | READ_BUF(8); |
1197 | /* gcbp_service */ |
1198 | READ32(dummy); |
1199 | /* gcbp_handle_from_server */ |
1200 | READ32(dummy); |
1201 | READ_BUF(dummy); |
1202 | p += XDR_QUADLEN(dummy); |
1203 | /* gcbp_handle_from_client */ |
1204 | READ_BUF(4); |
1205 | READ32(dummy); |
1206 | READ_BUF(dummy); |
1207 | p += XDR_QUADLEN(dummy); |
1208 | break; |
1209 | default: |
1210 | dprintk("Illegal callback secflavor\n"); |
1211 | return nfserr_inval; |
1212 | } |
1213 | } |
1214 | DECODE_TAIL; |
1215 | } |
1216 | |
1217 | static __be32 |
1218 | nfsd4_decode_destroy_session(struct nfsd4_compoundargs *argp, |
1219 | struct nfsd4_destroy_session *destroy_session) |
1220 | { |
1221 | DECODE_HEAD; |
1222 | READ_BUF(NFS4_MAX_SESSIONID_LEN); |
1223 | COPYMEM(destroy_session->sessionid.data, NFS4_MAX_SESSIONID_LEN); |
1224 | |
1225 | DECODE_TAIL; |
1226 | } |
1227 | |
1228 | static __be32 |
1229 | nfsd4_decode_sequence(struct nfsd4_compoundargs *argp, |
1230 | struct nfsd4_sequence *seq) |
1231 | { |
1232 | DECODE_HEAD; |
1233 | |
1234 | READ_BUF(NFS4_MAX_SESSIONID_LEN + 16); |
1235 | COPYMEM(seq->sessionid.data, NFS4_MAX_SESSIONID_LEN); |
1236 | READ32(seq->seqid); |
1237 | READ32(seq->slotid); |
1238 | READ32(seq->maxslots); |
1239 | READ32(seq->cachethis); |
1240 | |
1241 | DECODE_TAIL; |
1242 | } |
1243 | |
1244 | static __be32 |
1245 | nfsd4_decode_noop(struct nfsd4_compoundargs *argp, void *p) |
1246 | { |
1247 | return nfs_ok; |
1248 | } |
1249 | |
1250 | static __be32 |
1251 | nfsd4_decode_notsupp(struct nfsd4_compoundargs *argp, void *p) |
1252 | { |
1253 | return nfserr_notsupp; |
1254 | } |
1255 | |
1256 | typedef __be32(*nfsd4_dec)(struct nfsd4_compoundargs *argp, void *); |
1257 | |
1258 | static nfsd4_dec nfsd4_dec_ops[] = { |
1259 | [OP_ACCESS] = (nfsd4_dec)nfsd4_decode_access, |
1260 | [OP_CLOSE] = (nfsd4_dec)nfsd4_decode_close, |
1261 | [OP_COMMIT] = (nfsd4_dec)nfsd4_decode_commit, |
1262 | [OP_CREATE] = (nfsd4_dec)nfsd4_decode_create, |
1263 | [OP_DELEGPURGE] = (nfsd4_dec)nfsd4_decode_notsupp, |
1264 | [OP_DELEGRETURN] = (nfsd4_dec)nfsd4_decode_delegreturn, |
1265 | [OP_GETATTR] = (nfsd4_dec)nfsd4_decode_getattr, |
1266 | [OP_GETFH] = (nfsd4_dec)nfsd4_decode_noop, |
1267 | [OP_LINK] = (nfsd4_dec)nfsd4_decode_link, |
1268 | [OP_LOCK] = (nfsd4_dec)nfsd4_decode_lock, |
1269 | [OP_LOCKT] = (nfsd4_dec)nfsd4_decode_lockt, |
1270 | [OP_LOCKU] = (nfsd4_dec)nfsd4_decode_locku, |
1271 | [OP_LOOKUP] = (nfsd4_dec)nfsd4_decode_lookup, |
1272 | [OP_LOOKUPP] = (nfsd4_dec)nfsd4_decode_noop, |
1273 | [OP_NVERIFY] = (nfsd4_dec)nfsd4_decode_verify, |
1274 | [OP_OPEN] = (nfsd4_dec)nfsd4_decode_open, |
1275 | [OP_OPENATTR] = (nfsd4_dec)nfsd4_decode_notsupp, |
1276 | [OP_OPEN_CONFIRM] = (nfsd4_dec)nfsd4_decode_open_confirm, |
1277 | [OP_OPEN_DOWNGRADE] = (nfsd4_dec)nfsd4_decode_open_downgrade, |
1278 | [OP_PUTFH] = (nfsd4_dec)nfsd4_decode_putfh, |
1279 | [OP_PUTPUBFH] = (nfsd4_dec)nfsd4_decode_noop, |
1280 | [OP_PUTROOTFH] = (nfsd4_dec)nfsd4_decode_noop, |
1281 | [OP_READ] = (nfsd4_dec)nfsd4_decode_read, |
1282 | [OP_READDIR] = (nfsd4_dec)nfsd4_decode_readdir, |
1283 | [OP_READLINK] = (nfsd4_dec)nfsd4_decode_noop, |
1284 | [OP_REMOVE] = (nfsd4_dec)nfsd4_decode_remove, |
1285 | [OP_RENAME] = (nfsd4_dec)nfsd4_decode_rename, |
1286 | [OP_RENEW] = (nfsd4_dec)nfsd4_decode_renew, |
1287 | [OP_RESTOREFH] = (nfsd4_dec)nfsd4_decode_noop, |
1288 | [OP_SAVEFH] = (nfsd4_dec)nfsd4_decode_noop, |
1289 | [OP_SECINFO] = (nfsd4_dec)nfsd4_decode_secinfo, |
1290 | [OP_SETATTR] = (nfsd4_dec)nfsd4_decode_setattr, |
1291 | [OP_SETCLIENTID] = (nfsd4_dec)nfsd4_decode_setclientid, |
1292 | [OP_SETCLIENTID_CONFIRM] = (nfsd4_dec)nfsd4_decode_setclientid_confirm, |
1293 | [OP_VERIFY] = (nfsd4_dec)nfsd4_decode_verify, |
1294 | [OP_WRITE] = (nfsd4_dec)nfsd4_decode_write, |
1295 | [OP_RELEASE_LOCKOWNER] = (nfsd4_dec)nfsd4_decode_release_lockowner, |
1296 | }; |
1297 | |
1298 | static nfsd4_dec nfsd41_dec_ops[] = { |
1299 | [OP_ACCESS] = (nfsd4_dec)nfsd4_decode_access, |
1300 | [OP_CLOSE] = (nfsd4_dec)nfsd4_decode_close, |
1301 | [OP_COMMIT] = (nfsd4_dec)nfsd4_decode_commit, |
1302 | [OP_CREATE] = (nfsd4_dec)nfsd4_decode_create, |
1303 | [OP_DELEGPURGE] = (nfsd4_dec)nfsd4_decode_notsupp, |
1304 | [OP_DELEGRETURN] = (nfsd4_dec)nfsd4_decode_delegreturn, |
1305 | [OP_GETATTR] = (nfsd4_dec)nfsd4_decode_getattr, |
1306 | [OP_GETFH] = (nfsd4_dec)nfsd4_decode_noop, |
1307 | [OP_LINK] = (nfsd4_dec)nfsd4_decode_link, |
1308 | [OP_LOCK] = (nfsd4_dec)nfsd4_decode_lock, |
1309 | [OP_LOCKT] = (nfsd4_dec)nfsd4_decode_lockt, |
1310 | [OP_LOCKU] = (nfsd4_dec)nfsd4_decode_locku, |
1311 | [OP_LOOKUP] = (nfsd4_dec)nfsd4_decode_lookup, |
1312 | [OP_LOOKUPP] = (nfsd4_dec)nfsd4_decode_noop, |
1313 | [OP_NVERIFY] = (nfsd4_dec)nfsd4_decode_verify, |
1314 | [OP_OPEN] = (nfsd4_dec)nfsd4_decode_open, |
1315 | [OP_OPENATTR] = (nfsd4_dec)nfsd4_decode_notsupp, |
1316 | [OP_OPEN_CONFIRM] = (nfsd4_dec)nfsd4_decode_notsupp, |
1317 | [OP_OPEN_DOWNGRADE] = (nfsd4_dec)nfsd4_decode_open_downgrade, |
1318 | [OP_PUTFH] = (nfsd4_dec)nfsd4_decode_putfh, |
1319 | [OP_PUTPUBFH] = (nfsd4_dec)nfsd4_decode_notsupp, |
1320 | [OP_PUTROOTFH] = (nfsd4_dec)nfsd4_decode_noop, |
1321 | [OP_READ] = (nfsd4_dec)nfsd4_decode_read, |
1322 | [OP_READDIR] = (nfsd4_dec)nfsd4_decode_readdir, |
1323 | [OP_READLINK] = (nfsd4_dec)nfsd4_decode_noop, |
1324 | [OP_REMOVE] = (nfsd4_dec)nfsd4_decode_remove, |
1325 | [OP_RENAME] = (nfsd4_dec)nfsd4_decode_rename, |
1326 | [OP_RENEW] = (nfsd4_dec)nfsd4_decode_notsupp, |
1327 | [OP_RESTOREFH] = (nfsd4_dec)nfsd4_decode_noop, |
1328 | [OP_SAVEFH] = (nfsd4_dec)nfsd4_decode_noop, |
1329 | [OP_SECINFO] = (nfsd4_dec)nfsd4_decode_secinfo, |
1330 | [OP_SETATTR] = (nfsd4_dec)nfsd4_decode_setattr, |
1331 | [OP_SETCLIENTID] = (nfsd4_dec)nfsd4_decode_notsupp, |
1332 | [OP_SETCLIENTID_CONFIRM]= (nfsd4_dec)nfsd4_decode_notsupp, |
1333 | [OP_VERIFY] = (nfsd4_dec)nfsd4_decode_verify, |
1334 | [OP_WRITE] = (nfsd4_dec)nfsd4_decode_write, |
1335 | [OP_RELEASE_LOCKOWNER] = (nfsd4_dec)nfsd4_decode_notsupp, |
1336 | |
1337 | /* new operations for NFSv4.1 */ |
1338 | [OP_BACKCHANNEL_CTL] = (nfsd4_dec)nfsd4_decode_notsupp, |
1339 | [OP_BIND_CONN_TO_SESSION]= (nfsd4_dec)nfsd4_decode_notsupp, |
1340 | [OP_EXCHANGE_ID] = (nfsd4_dec)nfsd4_decode_exchange_id, |
1341 | [OP_CREATE_SESSION] = (nfsd4_dec)nfsd4_decode_create_session, |
1342 | [OP_DESTROY_SESSION] = (nfsd4_dec)nfsd4_decode_destroy_session, |
1343 | [OP_FREE_STATEID] = (nfsd4_dec)nfsd4_decode_notsupp, |
1344 | [OP_GET_DIR_DELEGATION] = (nfsd4_dec)nfsd4_decode_notsupp, |
1345 | [OP_GETDEVICEINFO] = (nfsd4_dec)nfsd4_decode_notsupp, |
1346 | [OP_GETDEVICELIST] = (nfsd4_dec)nfsd4_decode_notsupp, |
1347 | [OP_LAYOUTCOMMIT] = (nfsd4_dec)nfsd4_decode_notsupp, |
1348 | [OP_LAYOUTGET] = (nfsd4_dec)nfsd4_decode_notsupp, |
1349 | [OP_LAYOUTRETURN] = (nfsd4_dec)nfsd4_decode_notsupp, |
1350 | [OP_SECINFO_NO_NAME] = (nfsd4_dec)nfsd4_decode_notsupp, |
1351 | [OP_SEQUENCE] = (nfsd4_dec)nfsd4_decode_sequence, |
1352 | [OP_SET_SSV] = (nfsd4_dec)nfsd4_decode_notsupp, |
1353 | [OP_TEST_STATEID] = (nfsd4_dec)nfsd4_decode_notsupp, |
1354 | [OP_WANT_DELEGATION] = (nfsd4_dec)nfsd4_decode_notsupp, |
1355 | [OP_DESTROY_CLIENTID] = (nfsd4_dec)nfsd4_decode_notsupp, |
1356 | [OP_RECLAIM_COMPLETE] = (nfsd4_dec)nfsd4_decode_notsupp, |
1357 | }; |
1358 | |
1359 | struct nfsd4_minorversion_ops { |
1360 | nfsd4_dec *decoders; |
1361 | int nops; |
1362 | }; |
1363 | |
1364 | static struct nfsd4_minorversion_ops nfsd4_minorversion[] = { |
1365 | [0] = { nfsd4_dec_ops, ARRAY_SIZE(nfsd4_dec_ops) }, |
1366 | [1] = { nfsd41_dec_ops, ARRAY_SIZE(nfsd41_dec_ops) }, |
1367 | }; |
1368 | |
1369 | static __be32 |
1370 | nfsd4_decode_compound(struct nfsd4_compoundargs *argp) |
1371 | { |
1372 | DECODE_HEAD; |
1373 | struct nfsd4_op *op; |
1374 | struct nfsd4_minorversion_ops *ops; |
1375 | int i; |
1376 | |
1377 | /* |
1378 | * XXX: According to spec, we should check the tag |
1379 | * for UTF-8 compliance. I'm postponing this for |
1380 | * now because it seems that some clients do use |
1381 | * binary tags. |
1382 | */ |
1383 | READ_BUF(4); |
1384 | READ32(argp->taglen); |
1385 | READ_BUF(argp->taglen + 8); |
1386 | SAVEMEM(argp->tag, argp->taglen); |
1387 | READ32(argp->minorversion); |
1388 | READ32(argp->opcnt); |
1389 | |
1390 | if (argp->taglen > NFSD4_MAX_TAGLEN) |
1391 | goto xdr_error; |
1392 | if (argp->opcnt > 100) |
1393 | goto xdr_error; |
1394 | |
1395 | if (argp->opcnt > ARRAY_SIZE(argp->iops)) { |
1396 | argp->ops = kmalloc(argp->opcnt * sizeof(*argp->ops), GFP_KERNEL); |
1397 | if (!argp->ops) { |
1398 | argp->ops = argp->iops; |
1399 | dprintk("nfsd: couldn't allocate room for COMPOUND\n"); |
1400 | goto xdr_error; |
1401 | } |
1402 | } |
1403 | |
1404 | if (argp->minorversion >= ARRAY_SIZE(nfsd4_minorversion)) |
1405 | argp->opcnt = 0; |
1406 | |
1407 | ops = &nfsd4_minorversion[argp->minorversion]; |
1408 | for (i = 0; i < argp->opcnt; i++) { |
1409 | op = &argp->ops[i]; |
1410 | op->replay = NULL; |
1411 | |
1412 | /* |
1413 | * We can't use READ_BUF() here because we need to handle |
1414 | * a missing opcode as an OP_WRITE + 1. So we need to check |
1415 | * to see if we're truly at the end of our buffer or if there |
1416 | * is another page we need to flip to. |
1417 | */ |
1418 | |
1419 | if (argp->p == argp->end) { |
1420 | if (argp->pagelen < 4) { |
1421 | /* There isn't an opcode still on the wire */ |
1422 | op->opnum = OP_WRITE + 1; |
1423 | op->status = nfserr_bad_xdr; |
1424 | argp->opcnt = i+1; |
1425 | break; |
1426 | } |
1427 | |
1428 | /* |
1429 | * False alarm. We just hit a page boundary, but there |
1430 | * is still data available. Move pointer across page |
1431 | * boundary. *snip from READ_BUF* |
1432 | */ |
1433 | argp->p = page_address(argp->pagelist[0]); |
1434 | argp->pagelist++; |
1435 | if (argp->pagelen < PAGE_SIZE) { |
1436 | argp->end = p + (argp->pagelen>>2); |
1437 | argp->pagelen = 0; |
1438 | } else { |
1439 | argp->end = p + (PAGE_SIZE>>2); |
1440 | argp->pagelen -= PAGE_SIZE; |
1441 | } |
1442 | } |
1443 | op->opnum = ntohl(*argp->p++); |
1444 | |
1445 | if (op->opnum >= OP_ACCESS && op->opnum < ops->nops) |
1446 | op->status = ops->decoders[op->opnum](argp, &op->u); |
1447 | else { |
1448 | op->opnum = OP_ILLEGAL; |
1449 | op->status = nfserr_op_illegal; |
1450 | } |
1451 | |
1452 | if (op->status) { |
1453 | argp->opcnt = i+1; |
1454 | break; |
1455 | } |
1456 | } |
1457 | |
1458 | DECODE_TAIL; |
1459 | } |
1460 | |
1461 | #define WRITE32(n) *p++ = htonl(n) |
1462 | #define WRITE64(n) do { \ |
1463 | *p++ = htonl((u32)((n) >> 32)); \ |
1464 | *p++ = htonl((u32)(n)); \ |
1465 | } while (0) |
1466 | #define WRITEMEM(ptr,nbytes) do { if (nbytes > 0) { \ |
1467 | *(p + XDR_QUADLEN(nbytes) -1) = 0; \ |
1468 | memcpy(p, ptr, nbytes); \ |
1469 | p += XDR_QUADLEN(nbytes); \ |
1470 | }} while (0) |
1471 | |
1472 | static void write32(__be32 **p, u32 n) |
1473 | { |
1474 | *(*p)++ = n; |
1475 | } |
1476 | |
1477 | static void write64(__be32 **p, u64 n) |
1478 | { |
1479 | write32(p, (u32)(n >> 32)); |
1480 | write32(p, (u32)n); |
1481 | } |
1482 | |
1483 | static void write_change(__be32 **p, struct kstat *stat, struct inode *inode) |
1484 | { |
1485 | if (IS_I_VERSION(inode)) { |
1486 | write64(p, inode->i_version); |
1487 | } else { |
1488 | write32(p, stat->ctime.tv_sec); |
1489 | write32(p, stat->ctime.tv_nsec); |
1490 | } |
1491 | } |
1492 | |
1493 | static void write_cinfo(__be32 **p, struct nfsd4_change_info *c) |
1494 | { |
1495 | write32(p, c->atomic); |
1496 | if (c->change_supported) { |
1497 | write64(p, c->before_change); |
1498 | write64(p, c->after_change); |
1499 | } else { |
1500 | write32(p, c->before_ctime_sec); |
1501 | write32(p, c->before_ctime_nsec); |
1502 | write32(p, c->after_ctime_sec); |
1503 | write32(p, c->after_ctime_nsec); |
1504 | } |
1505 | } |
1506 | |
1507 | #define RESERVE_SPACE(nbytes) do { \ |
1508 | p = resp->p; \ |
1509 | BUG_ON(p + XDR_QUADLEN(nbytes) > resp->end); \ |
1510 | } while (0) |
1511 | #define ADJUST_ARGS() resp->p = p |
1512 | |
1513 | /* |
1514 | * Header routine to setup seqid operation replay cache |
1515 | */ |
1516 | #define ENCODE_SEQID_OP_HEAD \ |
1517 | __be32 *save; \ |
1518 | \ |
1519 | save = resp->p; |
1520 | |
1521 | /* |
1522 | * Routine for encoding the result of a "seqid-mutating" NFSv4 operation. This |
1523 | * is where sequence id's are incremented, and the replay cache is filled. |
1524 | * Note that we increment sequence id's here, at the last moment, so we're sure |
1525 | * we know whether the error to be returned is a sequence id mutating error. |
1526 | */ |
1527 | |
1528 | #define ENCODE_SEQID_OP_TAIL(stateowner) do { \ |
1529 | if (seqid_mutating_err(nfserr) && stateowner) { \ |
1530 | stateowner->so_seqid++; \ |
1531 | stateowner->so_replay.rp_status = nfserr; \ |
1532 | stateowner->so_replay.rp_buflen = \ |
1533 | (((char *)(resp)->p - (char *)save)); \ |
1534 | memcpy(stateowner->so_replay.rp_buf, save, \ |
1535 | stateowner->so_replay.rp_buflen); \ |
1536 | } } while (0); |
1537 | |
1538 | /* Encode as an array of strings the string given with components |
1539 | * seperated @sep. |
1540 | */ |
1541 | static __be32 nfsd4_encode_components(char sep, char *components, |
1542 | __be32 **pp, int *buflen) |
1543 | { |
1544 | __be32 *p = *pp; |
1545 | __be32 *countp = p; |
1546 | int strlen, count=0; |
1547 | char *str, *end; |
1548 | |
1549 | dprintk("nfsd4_encode_components(%s)\n", components); |
1550 | if ((*buflen -= 4) < 0) |
1551 | return nfserr_resource; |
1552 | WRITE32(0); /* We will fill this in with @count later */ |
1553 | end = str = components; |
1554 | while (*end) { |
1555 | for (; *end && (*end != sep); end++) |
1556 | ; /* Point to end of component */ |
1557 | strlen = end - str; |
1558 | if (strlen) { |
1559 | if ((*buflen -= ((XDR_QUADLEN(strlen) << 2) + 4)) < 0) |
1560 | return nfserr_resource; |
1561 | WRITE32(strlen); |
1562 | WRITEMEM(str, strlen); |
1563 | count++; |
1564 | } |
1565 | else |
1566 | end++; |
1567 | str = end; |
1568 | } |
1569 | *pp = p; |
1570 | p = countp; |
1571 | WRITE32(count); |
1572 | return 0; |
1573 | } |
1574 | |
1575 | /* |
1576 | * encode a location element of a fs_locations structure |
1577 | */ |
1578 | static __be32 nfsd4_encode_fs_location4(struct nfsd4_fs_location *location, |
1579 | __be32 **pp, int *buflen) |
1580 | { |
1581 | __be32 status; |
1582 | __be32 *p = *pp; |
1583 | |
1584 | status = nfsd4_encode_components(':', location->hosts, &p, buflen); |
1585 | if (status) |
1586 | return status; |
1587 | status = nfsd4_encode_components('/', location->path, &p, buflen); |
1588 | if (status) |
1589 | return status; |
1590 | *pp = p; |
1591 | return 0; |
1592 | } |
1593 | |
1594 | /* |
1595 | * Return the path to an export point in the pseudo filesystem namespace |
1596 | * Returned string is safe to use as long as the caller holds a reference |
1597 | * to @exp. |
1598 | */ |
1599 | static char *nfsd4_path(struct svc_rqst *rqstp, struct svc_export *exp, __be32 *stat) |
1600 | { |
1601 | struct svc_fh tmp_fh; |
1602 | char *path, *rootpath; |
1603 | |
1604 | fh_init(&tmp_fh, NFS4_FHSIZE); |
1605 | *stat = exp_pseudoroot(rqstp, &tmp_fh); |
1606 | if (*stat) |
1607 | return NULL; |
1608 | rootpath = tmp_fh.fh_export->ex_pathname; |
1609 | |
1610 | path = exp->ex_pathname; |
1611 | |
1612 | if (strncmp(path, rootpath, strlen(rootpath))) { |
1613 | dprintk("nfsd: fs_locations failed;" |
1614 | "%s is not contained in %s\n", path, rootpath); |
1615 | *stat = nfserr_notsupp; |
1616 | return NULL; |
1617 | } |
1618 | |
1619 | return path + strlen(rootpath); |
1620 | } |
1621 | |
1622 | /* |
1623 | * encode a fs_locations structure |
1624 | */ |
1625 | static __be32 nfsd4_encode_fs_locations(struct svc_rqst *rqstp, |
1626 | struct svc_export *exp, |
1627 | __be32 **pp, int *buflen) |
1628 | { |
1629 | __be32 status; |
1630 | int i; |
1631 | __be32 *p = *pp; |
1632 | struct nfsd4_fs_locations *fslocs = &exp->ex_fslocs; |
1633 | char *root = nfsd4_path(rqstp, exp, &status); |
1634 | |
1635 | if (status) |
1636 | return status; |
1637 | status = nfsd4_encode_components('/', root, &p, buflen); |
1638 | if (status) |
1639 | return status; |
1640 | if ((*buflen -= 4) < 0) |
1641 | return nfserr_resource; |
1642 | WRITE32(fslocs->locations_count); |
1643 | for (i=0; i<fslocs->locations_count; i++) { |
1644 | status = nfsd4_encode_fs_location4(&fslocs->locations[i], |
1645 | &p, buflen); |
1646 | if (status) |
1647 | return status; |
1648 | } |
1649 | *pp = p; |
1650 | return 0; |
1651 | } |
1652 | |
1653 | static u32 nfs4_ftypes[16] = { |
1654 | NF4BAD, NF4FIFO, NF4CHR, NF4BAD, |
1655 | NF4DIR, NF4BAD, NF4BLK, NF4BAD, |
1656 | NF4REG, NF4BAD, NF4LNK, NF4BAD, |
1657 | NF4SOCK, NF4BAD, NF4LNK, NF4BAD, |
1658 | }; |
1659 | |
1660 | static __be32 |
1661 | nfsd4_encode_name(struct svc_rqst *rqstp, int whotype, uid_t id, int group, |
1662 | __be32 **p, int *buflen) |
1663 | { |
1664 | int status; |
1665 | |
1666 | if (*buflen < (XDR_QUADLEN(IDMAP_NAMESZ) << 2) + 4) |
1667 | return nfserr_resource; |
1668 | if (whotype != NFS4_ACL_WHO_NAMED) |
1669 | status = nfs4_acl_write_who(whotype, (u8 *)(*p + 1)); |
1670 | else if (group) |
1671 | status = nfsd_map_gid_to_name(rqstp, id, (u8 *)(*p + 1)); |
1672 | else |
1673 | status = nfsd_map_uid_to_name(rqstp, id, (u8 *)(*p + 1)); |
1674 | if (status < 0) |
1675 | return nfserrno(status); |
1676 | *p = xdr_encode_opaque(*p, NULL, status); |
1677 | *buflen -= (XDR_QUADLEN(status) << 2) + 4; |
1678 | BUG_ON(*buflen < 0); |
1679 | return 0; |
1680 | } |
1681 | |
1682 | static inline __be32 |
1683 | nfsd4_encode_user(struct svc_rqst *rqstp, uid_t uid, __be32 **p, int *buflen) |
1684 | { |
1685 | return nfsd4_encode_name(rqstp, NFS4_ACL_WHO_NAMED, uid, 0, p, buflen); |
1686 | } |
1687 | |
1688 | static inline __be32 |
1689 | nfsd4_encode_group(struct svc_rqst *rqstp, uid_t gid, __be32 **p, int *buflen) |
1690 | { |
1691 | return nfsd4_encode_name(rqstp, NFS4_ACL_WHO_NAMED, gid, 1, p, buflen); |
1692 | } |
1693 | |
1694 | static inline __be32 |
1695 | nfsd4_encode_aclname(struct svc_rqst *rqstp, int whotype, uid_t id, int group, |
1696 | __be32 **p, int *buflen) |
1697 | { |
1698 | return nfsd4_encode_name(rqstp, whotype, id, group, p, buflen); |
1699 | } |
1700 | |
1701 | #define WORD0_ABSENT_FS_ATTRS (FATTR4_WORD0_FS_LOCATIONS | FATTR4_WORD0_FSID | \ |
1702 | FATTR4_WORD0_RDATTR_ERROR) |
1703 | #define WORD1_ABSENT_FS_ATTRS FATTR4_WORD1_MOUNTED_ON_FILEID |
1704 | |
1705 | static __be32 fattr_handle_absent_fs(u32 *bmval0, u32 *bmval1, u32 *rdattr_err) |
1706 | { |
1707 | /* As per referral draft: */ |
1708 | if (*bmval0 & ~WORD0_ABSENT_FS_ATTRS || |
1709 | *bmval1 & ~WORD1_ABSENT_FS_ATTRS) { |
1710 | if (*bmval0 & FATTR4_WORD0_RDATTR_ERROR || |
1711 | *bmval0 & FATTR4_WORD0_FS_LOCATIONS) |
1712 | *rdattr_err = NFSERR_MOVED; |
1713 | else |
1714 | return nfserr_moved; |
1715 | } |
1716 | *bmval0 &= WORD0_ABSENT_FS_ATTRS; |
1717 | *bmval1 &= WORD1_ABSENT_FS_ATTRS; |
1718 | return 0; |
1719 | } |
1720 | |
1721 | /* |
1722 | * Note: @fhp can be NULL; in this case, we might have to compose the filehandle |
1723 | * ourselves. |
1724 | * |
1725 | * @countp is the buffer size in _words_; upon successful return this becomes |
1726 | * replaced with the number of words written. |
1727 | */ |
1728 | __be32 |
1729 | nfsd4_encode_fattr(struct svc_fh *fhp, struct svc_export *exp, |
1730 | struct dentry *dentry, __be32 *buffer, int *countp, u32 *bmval, |
1731 | struct svc_rqst *rqstp, int ignore_crossmnt) |
1732 | { |
1733 | u32 bmval0 = bmval[0]; |
1734 | u32 bmval1 = bmval[1]; |
1735 | u32 bmval2 = bmval[2]; |
1736 | struct kstat stat; |
1737 | struct svc_fh tempfh; |
1738 | struct kstatfs statfs; |
1739 | int buflen = *countp << 2; |
1740 | __be32 *attrlenp; |
1741 | u32 dummy; |
1742 | u64 dummy64; |
1743 | u32 rdattr_err = 0; |
1744 | __be32 *p = buffer; |
1745 | __be32 status; |
1746 | int err; |
1747 | int aclsupport = 0; |
1748 | struct nfs4_acl *acl = NULL; |
1749 | struct nfsd4_compoundres *resp = rqstp->rq_resp; |
1750 | u32 minorversion = resp->cstate.minorversion; |
1751 | |
1752 | BUG_ON(bmval1 & NFSD_WRITEONLY_ATTRS_WORD1); |
1753 | BUG_ON(bmval0 & ~nfsd_suppattrs0(minorversion)); |
1754 | BUG_ON(bmval1 & ~nfsd_suppattrs1(minorversion)); |
1755 | BUG_ON(bmval2 & ~nfsd_suppattrs2(minorversion)); |
1756 | |
1757 | if (exp->ex_fslocs.migrated) { |
1758 | BUG_ON(bmval[2]); |
1759 | status = fattr_handle_absent_fs(&bmval0, &bmval1, &rdattr_err); |
1760 | if (status) |
1761 | goto out; |
1762 | } |
1763 | |
1764 | err = vfs_getattr(exp->ex_path.mnt, dentry, &stat); |
1765 | if (err) |
1766 | goto out_nfserr; |
1767 | if ((bmval0 & (FATTR4_WORD0_FILES_FREE | FATTR4_WORD0_FILES_TOTAL | |
1768 | FATTR4_WORD0_MAXNAME)) || |
1769 | (bmval1 & (FATTR4_WORD1_SPACE_AVAIL | FATTR4_WORD1_SPACE_FREE | |
1770 | FATTR4_WORD1_SPACE_TOTAL))) { |
1771 | err = vfs_statfs(dentry, &statfs); |
1772 | if (err) |
1773 | goto out_nfserr; |
1774 | } |
1775 | if ((bmval0 & (FATTR4_WORD0_FILEHANDLE | FATTR4_WORD0_FSID)) && !fhp) { |
1776 | fh_init(&tempfh, NFS4_FHSIZE); |
1777 | status = fh_compose(&tempfh, exp, dentry, NULL); |
1778 | if (status) |
1779 | goto out; |
1780 | fhp = &tempfh; |
1781 | } |
1782 | if (bmval0 & (FATTR4_WORD0_ACL | FATTR4_WORD0_ACLSUPPORT |
1783 | | FATTR4_WORD0_SUPPORTED_ATTRS)) { |
1784 | err = nfsd4_get_nfs4_acl(rqstp, dentry, &acl); |
1785 | aclsupport = (err == 0); |
1786 | if (bmval0 & FATTR4_WORD0_ACL) { |
1787 | if (err == -EOPNOTSUPP) |
1788 | bmval0 &= ~FATTR4_WORD0_ACL; |
1789 | else if (err == -EINVAL) { |
1790 | status = nfserr_attrnotsupp; |
1791 | goto out; |
1792 | } else if (err != 0) |
1793 | goto out_nfserr; |
1794 | } |
1795 | } |
1796 | if (bmval0 & FATTR4_WORD0_FS_LOCATIONS) { |
1797 | if (exp->ex_fslocs.locations == NULL) { |
1798 | bmval0 &= ~FATTR4_WORD0_FS_LOCATIONS; |
1799 | } |
1800 | } |
1801 | if ((buflen -= 16) < 0) |
1802 | goto out_resource; |
1803 | |
1804 | if (unlikely(bmval2)) { |
1805 | WRITE32(3); |
1806 | WRITE32(bmval0); |
1807 | WRITE32(bmval1); |
1808 | WRITE32(bmval2); |
1809 | } else if (likely(bmval1)) { |
1810 | WRITE32(2); |
1811 | WRITE32(bmval0); |
1812 | WRITE32(bmval1); |
1813 | } else { |
1814 | WRITE32(1); |
1815 | WRITE32(bmval0); |
1816 | } |
1817 | attrlenp = p++; /* to be backfilled later */ |
1818 | |
1819 | if (bmval0 & FATTR4_WORD0_SUPPORTED_ATTRS) { |
1820 | u32 word0 = nfsd_suppattrs0(minorversion); |
1821 | u32 word1 = nfsd_suppattrs1(minorversion); |
1822 | u32 word2 = nfsd_suppattrs2(minorversion); |
1823 | |
1824 | if ((buflen -= 12) < 0) |
1825 | goto out_resource; |
1826 | if (!aclsupport) |
1827 | word0 &= ~FATTR4_WORD0_ACL; |
1828 | if (!exp->ex_fslocs.locations) |
1829 | word0 &= ~FATTR4_WORD0_FS_LOCATIONS; |
1830 | if (!word2) { |
1831 | WRITE32(2); |
1832 | WRITE32(word0); |
1833 | WRITE32(word1); |
1834 | } else { |
1835 | WRITE32(3); |
1836 | WRITE32(word0); |
1837 | WRITE32(word1); |
1838 | WRITE32(word2); |
1839 | } |
1840 | } |
1841 | if (bmval0 & FATTR4_WORD0_TYPE) { |
1842 | if ((buflen -= 4) < 0) |
1843 | goto out_resource; |
1844 | dummy = nfs4_ftypes[(stat.mode & S_IFMT) >> 12]; |
1845 | if (dummy == NF4BAD) |
1846 | goto out_serverfault; |
1847 | WRITE32(dummy); |
1848 | } |
1849 | if (bmval0 & FATTR4_WORD0_FH_EXPIRE_TYPE) { |
1850 | if ((buflen -= 4) < 0) |
1851 | goto out_resource; |
1852 | if (exp->ex_flags & NFSEXP_NOSUBTREECHECK) |
1853 | WRITE32(NFS4_FH_PERSISTENT); |
1854 | else |
1855 | WRITE32(NFS4_FH_PERSISTENT|NFS4_FH_VOL_RENAME); |
1856 | } |
1857 | if (bmval0 & FATTR4_WORD0_CHANGE) { |
1858 | if ((buflen -= 8) < 0) |
1859 | goto out_resource; |
1860 | write_change(&p, &stat, dentry->d_inode); |
1861 | } |
1862 | if (bmval0 & FATTR4_WORD0_SIZE) { |
1863 | if ((buflen -= 8) < 0) |
1864 | goto out_resource; |
1865 | WRITE64(stat.size); |
1866 | } |
1867 | if (bmval0 & FATTR4_WORD0_LINK_SUPPORT) { |
1868 | if ((buflen -= 4) < 0) |
1869 | goto out_resource; |
1870 | WRITE32(1); |
1871 | } |
1872 | if (bmval0 & FATTR4_WORD0_SYMLINK_SUPPORT) { |
1873 | if ((buflen -= 4) < 0) |
1874 | goto out_resource; |
1875 | WRITE32(1); |
1876 | } |
1877 | if (bmval0 & FATTR4_WORD0_NAMED_ATTR) { |
1878 | if ((buflen -= 4) < 0) |
1879 | goto out_resource; |
1880 | WRITE32(0); |
1881 | } |
1882 | if (bmval0 & FATTR4_WORD0_FSID) { |
1883 | if ((buflen -= 16) < 0) |
1884 | goto out_resource; |
1885 | if (exp->ex_fslocs.migrated) { |
1886 | WRITE64(NFS4_REFERRAL_FSID_MAJOR); |
1887 | WRITE64(NFS4_REFERRAL_FSID_MINOR); |
1888 | } else switch(fsid_source(fhp)) { |
1889 | case FSIDSOURCE_FSID: |
1890 | WRITE64((u64)exp->ex_fsid); |
1891 | WRITE64((u64)0); |
1892 | break; |
1893 | case FSIDSOURCE_DEV: |
1894 | WRITE32(0); |
1895 | WRITE32(MAJOR(stat.dev)); |
1896 | WRITE32(0); |
1897 | WRITE32(MINOR(stat.dev)); |
1898 | break; |
1899 | case FSIDSOURCE_UUID: |
1900 | WRITEMEM(exp->ex_uuid, 16); |
1901 | break; |
1902 | } |
1903 | } |
1904 | if (bmval0 & FATTR4_WORD0_UNIQUE_HANDLES) { |
1905 | if ((buflen -= 4) < 0) |
1906 | goto out_resource; |
1907 | WRITE32(0); |
1908 | } |
1909 | if (bmval0 & FATTR4_WORD0_LEASE_TIME) { |
1910 | if ((buflen -= 4) < 0) |
1911 | goto out_resource; |
1912 | WRITE32(NFSD_LEASE_TIME); |
1913 | } |
1914 | if (bmval0 & FATTR4_WORD0_RDATTR_ERROR) { |
1915 | if ((buflen -= 4) < 0) |
1916 | goto out_resource; |
1917 | WRITE32(rdattr_err); |
1918 | } |
1919 | if (bmval0 & FATTR4_WORD0_ACL) { |
1920 | struct nfs4_ace *ace; |
1921 | |
1922 | if (acl == NULL) { |
1923 | if ((buflen -= 4) < 0) |
1924 | goto out_resource; |
1925 | |
1926 | WRITE32(0); |
1927 | goto out_acl; |
1928 | } |
1929 | if ((buflen -= 4) < 0) |
1930 | goto out_resource; |
1931 | WRITE32(acl->naces); |
1932 | |
1933 | for (ace = acl->aces; ace < acl->aces + acl->naces; ace++) { |
1934 | if ((buflen -= 4*3) < 0) |
1935 | goto out_resource; |
1936 | WRITE32(ace->type); |
1937 | WRITE32(ace->flag); |
1938 | WRITE32(ace->access_mask & NFS4_ACE_MASK_ALL); |
1939 | status = nfsd4_encode_aclname(rqstp, ace->whotype, |
1940 | ace->who, ace->flag & NFS4_ACE_IDENTIFIER_GROUP, |
1941 | &p, &buflen); |
1942 | if (status == nfserr_resource) |
1943 | goto out_resource; |
1944 | if (status) |
1945 | goto out; |
1946 | } |
1947 | } |
1948 | out_acl: |
1949 | if (bmval0 & FATTR4_WORD0_ACLSUPPORT) { |
1950 | if ((buflen -= 4) < 0) |
1951 | goto out_resource; |
1952 | WRITE32(aclsupport ? |
1953 | ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL : 0); |
1954 | } |
1955 | if (bmval0 & FATTR4_WORD0_CANSETTIME) { |
1956 | if ((buflen -= 4) < 0) |
1957 | goto out_resource; |
1958 | WRITE32(1); |
1959 | } |
1960 | if (bmval0 & FATTR4_WORD0_CASE_INSENSITIVE) { |
1961 | if ((buflen -= 4) < 0) |
1962 | goto out_resource; |
1963 | WRITE32(1); |
1964 | } |
1965 | if (bmval0 & FATTR4_WORD0_CASE_PRESERVING) { |
1966 | if ((buflen -= 4) < 0) |
1967 | goto out_resource; |
1968 | WRITE32(1); |
1969 | } |
1970 | if (bmval0 & FATTR4_WORD0_CHOWN_RESTRICTED) { |
1971 | if ((buflen -= 4) < 0) |
1972 | goto out_resource; |
1973 | WRITE32(1); |
1974 | } |
1975 | if (bmval0 & FATTR4_WORD0_FILEHANDLE) { |
1976 | buflen -= (XDR_QUADLEN(fhp->fh_handle.fh_size) << 2) + 4; |
1977 | if (buflen < 0) |
1978 | goto out_resource; |
1979 | WRITE32(fhp->fh_handle.fh_size); |
1980 | WRITEMEM(&fhp->fh_handle.fh_base, fhp->fh_handle.fh_size); |
1981 | } |
1982 | if (bmval0 & FATTR4_WORD0_FILEID) { |
1983 | if ((buflen -= 8) < 0) |
1984 | goto out_resource; |
1985 | WRITE64(stat.ino); |
1986 | } |
1987 | if (bmval0 & FATTR4_WORD0_FILES_AVAIL) { |
1988 | if ((buflen -= 8) < 0) |
1989 | goto out_resource; |
1990 | WRITE64((u64) statfs.f_ffree); |
1991 | } |
1992 | if (bmval0 & FATTR4_WORD0_FILES_FREE) { |
1993 | if ((buflen -= 8) < 0) |
1994 | goto out_resource; |
1995 | WRITE64((u64) statfs.f_ffree); |
1996 | } |
1997 | if (bmval0 & FATTR4_WORD0_FILES_TOTAL) { |
1998 | if ((buflen -= 8) < 0) |
1999 | goto out_resource; |
2000 | WRITE64((u64) statfs.f_files); |
2001 | } |
2002 | if (bmval0 & FATTR4_WORD0_FS_LOCATIONS) { |
2003 | status = nfsd4_encode_fs_locations(rqstp, exp, &p, &buflen); |
2004 | if (status == nfserr_resource) |
2005 | goto out_resource; |
2006 | if (status) |
2007 | goto out; |
2008 | } |
2009 | if (bmval0 & FATTR4_WORD0_HOMOGENEOUS) { |
2010 | if ((buflen -= 4) < 0) |
2011 | goto out_resource; |
2012 | WRITE32(1); |
2013 | } |
2014 | if (bmval0 & FATTR4_WORD0_MAXFILESIZE) { |
2015 | if ((buflen -= 8) < 0) |
2016 | goto out_resource; |
2017 | WRITE64(~(u64)0); |
2018 | } |
2019 | if (bmval0 & FATTR4_WORD0_MAXLINK) { |
2020 | if ((buflen -= 4) < 0) |
2021 | goto out_resource; |
2022 | WRITE32(255); |
2023 | } |
2024 | if (bmval0 & FATTR4_WORD0_MAXNAME) { |
2025 | if ((buflen -= 4) < 0) |
2026 | goto out_resource; |
2027 | WRITE32(statfs.f_namelen); |
2028 | } |
2029 | if (bmval0 & FATTR4_WORD0_MAXREAD) { |
2030 | if ((buflen -= 8) < 0) |
2031 | goto out_resource; |
2032 | WRITE64((u64) svc_max_payload(rqstp)); |
2033 | } |
2034 | if (bmval0 & FATTR4_WORD0_MAXWRITE) { |
2035 | if ((buflen -= 8) < 0) |
2036 | goto out_resource; |
2037 | WRITE64((u64) svc_max_payload(rqstp)); |
2038 | } |
2039 | if (bmval1 & FATTR4_WORD1_MODE) { |
2040 | if ((buflen -= 4) < 0) |
2041 | goto out_resource; |
2042 | WRITE32(stat.mode & S_IALLUGO); |
2043 | } |
2044 | if (bmval1 & FATTR4_WORD1_NO_TRUNC) { |
2045 | if ((buflen -= 4) < 0) |
2046 | goto out_resource; |
2047 | WRITE32(1); |
2048 | } |
2049 | if (bmval1 & FATTR4_WORD1_NUMLINKS) { |
2050 | if ((buflen -= 4) < 0) |
2051 | goto out_resource; |
2052 | WRITE32(stat.nlink); |
2053 | } |
2054 | if (bmval1 & FATTR4_WORD1_OWNER) { |
2055 | status = nfsd4_encode_user(rqstp, stat.uid, &p, &buflen); |
2056 | if (status == nfserr_resource) |
2057 | goto out_resource; |
2058 | if (status) |
2059 | goto out; |
2060 | } |
2061 | if (bmval1 & FATTR4_WORD1_OWNER_GROUP) { |
2062 | status = nfsd4_encode_group(rqstp, stat.gid, &p, &buflen); |
2063 | if (status == nfserr_resource) |
2064 | goto out_resource; |
2065 | if (status) |
2066 | goto out; |
2067 | } |
2068 | if (bmval1 & FATTR4_WORD1_RAWDEV) { |
2069 | if ((buflen -= 8) < 0) |
2070 | goto out_resource; |
2071 | WRITE32((u32) MAJOR(stat.rdev)); |
2072 | WRITE32((u32) MINOR(stat.rdev)); |
2073 | } |
2074 | if (bmval1 & FATTR4_WORD1_SPACE_AVAIL) { |
2075 | if ((buflen -= 8) < 0) |
2076 | goto out_resource; |
2077 | dummy64 = (u64)statfs.f_bavail * (u64)statfs.f_bsize; |
2078 | WRITE64(dummy64); |
2079 | } |
2080 | if (bmval1 & FATTR4_WORD1_SPACE_FREE) { |
2081 | if ((buflen -= 8) < 0) |
2082 | goto out_resource; |
2083 | dummy64 = (u64)statfs.f_bfree * (u64)statfs.f_bsize; |
2084 | WRITE64(dummy64); |
2085 | } |
2086 | if (bmval1 & FATTR4_WORD1_SPACE_TOTAL) { |
2087 | if ((buflen -= 8) < 0) |
2088 | goto out_resource; |
2089 | dummy64 = (u64)statfs.f_blocks * (u64)statfs.f_bsize; |
2090 | WRITE64(dummy64); |
2091 | } |
2092 | if (bmval1 & FATTR4_WORD1_SPACE_USED) { |
2093 | if ((buflen -= 8) < 0) |
2094 | goto out_resource; |
2095 | dummy64 = (u64)stat.blocks << 9; |
2096 | WRITE64(dummy64); |
2097 | } |
2098 | if (bmval1 & FATTR4_WORD1_TIME_ACCESS) { |
2099 | if ((buflen -= 12) < 0) |
2100 | goto out_resource; |
2101 | WRITE32(0); |
2102 | WRITE32(stat.atime.tv_sec); |
2103 | WRITE32(stat.atime.tv_nsec); |
2104 | } |
2105 | if (bmval1 & FATTR4_WORD1_TIME_DELTA) { |
2106 | if ((buflen -= 12) < 0) |
2107 | goto out_resource; |
2108 | WRITE32(0); |
2109 | WRITE32(1); |
2110 | WRITE32(0); |
2111 | } |
2112 | if (bmval1 & FATTR4_WORD1_TIME_METADATA) { |
2113 | if ((buflen -= 12) < 0) |
2114 | goto out_resource; |
2115 | WRITE32(0); |
2116 | WRITE32(stat.ctime.tv_sec); |
2117 | WRITE32(stat.ctime.tv_nsec); |
2118 | } |
2119 | if (bmval1 & FATTR4_WORD1_TIME_MODIFY) { |
2120 | if ((buflen -= 12) < 0) |
2121 | goto out_resource; |
2122 | WRITE32(0); |
2123 | WRITE32(stat.mtime.tv_sec); |
2124 | WRITE32(stat.mtime.tv_nsec); |
2125 | } |
2126 | if (bmval1 & FATTR4_WORD1_MOUNTED_ON_FILEID) { |
2127 | if ((buflen -= 8) < 0) |
2128 | goto out_resource; |
2129 | /* |
2130 | * Get parent's attributes if not ignoring crossmount |
2131 | * and this is the root of a cross-mounted filesystem. |
2132 | */ |
2133 | if (ignore_crossmnt == 0 && |
2134 | exp->ex_path.mnt->mnt_root->d_inode == dentry->d_inode) { |
2135 | err = vfs_getattr(exp->ex_path.mnt->mnt_parent, |
2136 | exp->ex_path.mnt->mnt_mountpoint, &stat); |
2137 | if (err) |
2138 | goto out_nfserr; |
2139 | } |
2140 | WRITE64(stat.ino); |
2141 | } |
2142 | if (bmval2 & FATTR4_WORD2_SUPPATTR_EXCLCREAT) { |
2143 | WRITE32(3); |
2144 | WRITE32(NFSD_SUPPATTR_EXCLCREAT_WORD0); |
2145 | WRITE32(NFSD_SUPPATTR_EXCLCREAT_WORD1); |
2146 | WRITE32(NFSD_SUPPATTR_EXCLCREAT_WORD2); |
2147 | } |
2148 | |
2149 | *attrlenp = htonl((char *)p - (char *)attrlenp - 4); |
2150 | *countp = p - buffer; |
2151 | status = nfs_ok; |
2152 | |
2153 | out: |
2154 | kfree(acl); |
2155 | if (fhp == &tempfh) |
2156 | fh_put(&tempfh); |
2157 | return status; |
2158 | out_nfserr: |
2159 | status = nfserrno(err); |
2160 | goto out; |
2161 | out_resource: |
2162 | *countp = 0; |
2163 | status = nfserr_resource; |
2164 | goto out; |
2165 | out_serverfault: |
2166 | status = nfserr_serverfault; |
2167 | goto out; |
2168 | } |
2169 | |
2170 | static inline int attributes_need_mount(u32 *bmval) |
2171 | { |
2172 | if (bmval[0] & ~(FATTR4_WORD0_RDATTR_ERROR | FATTR4_WORD0_LEASE_TIME)) |
2173 | return 1; |
2174 | if (bmval[1] & ~FATTR4_WORD1_MOUNTED_ON_FILEID) |
2175 | return 1; |
2176 | return 0; |
2177 | } |
2178 | |
2179 | static __be32 |
2180 | nfsd4_encode_dirent_fattr(struct nfsd4_readdir *cd, |
2181 | const char *name, int namlen, __be32 *p, int *buflen) |
2182 | { |
2183 | struct svc_export *exp = cd->rd_fhp->fh_export; |
2184 | struct dentry *dentry; |
2185 | __be32 nfserr; |
2186 | int ignore_crossmnt = 0; |
2187 | |
2188 | dentry = lookup_one_len(name, cd->rd_fhp->fh_dentry, namlen); |
2189 | if (IS_ERR(dentry)) |
2190 | return nfserrno(PTR_ERR(dentry)); |
2191 | if (!dentry->d_inode) { |
2192 | /* |
2193 | * nfsd_buffered_readdir drops the i_mutex between |
2194 | * readdir and calling this callback, leaving a window |
2195 | * where this directory entry could have gone away. |
2196 | */ |
2197 | dput(dentry); |
2198 | return nfserr_noent; |
2199 | } |
2200 | |
2201 | exp_get(exp); |
2202 | /* |
2203 | * In the case of a mountpoint, the client may be asking for |
2204 | * attributes that are only properties of the underlying filesystem |
2205 | * as opposed to the cross-mounted file system. In such a case, |
2206 | * we will not follow the cross mount and will fill the attribtutes |
2207 | * directly from the mountpoint dentry. |
2208 | */ |
2209 | if (d_mountpoint(dentry) && !attributes_need_mount(cd->rd_bmval)) |
2210 | ignore_crossmnt = 1; |
2211 | else if (d_mountpoint(dentry)) { |
2212 | int err; |
2213 | |
2214 | /* |
2215 | * Why the heck aren't we just using nfsd_lookup?? |
2216 | * Different "."/".." handling? Something else? |
2217 | * At least, add a comment here to explain.... |
2218 | */ |
2219 | err = nfsd_cross_mnt(cd->rd_rqstp, &dentry, &exp); |
2220 | if (err) { |
2221 | nfserr = nfserrno(err); |
2222 | goto out_put; |
2223 | } |
2224 | nfserr = check_nfsd_access(exp, cd->rd_rqstp); |
2225 | if (nfserr) |
2226 | goto out_put; |
2227 | |
2228 | } |
2229 | nfserr = nfsd4_encode_fattr(NULL, exp, dentry, p, buflen, cd->rd_bmval, |
2230 | cd->rd_rqstp, ignore_crossmnt); |
2231 | out_put: |
2232 | dput(dentry); |
2233 | exp_put(exp); |
2234 | return nfserr; |
2235 | } |
2236 | |
2237 | static __be32 * |
2238 | nfsd4_encode_rdattr_error(__be32 *p, int buflen, __be32 nfserr) |
2239 | { |
2240 | __be32 *attrlenp; |
2241 | |
2242 | if (buflen < 6) |
2243 | return NULL; |
2244 | *p++ = htonl(2); |
2245 | *p++ = htonl(FATTR4_WORD0_RDATTR_ERROR); /* bmval0 */ |
2246 | *p++ = htonl(0); /* bmval1 */ |
2247 | |
2248 | attrlenp = p++; |
2249 | *p++ = nfserr; /* no htonl */ |
2250 | *attrlenp = htonl((char *)p - (char *)attrlenp - 4); |
2251 | return p; |
2252 | } |
2253 | |
2254 | static int |
2255 | nfsd4_encode_dirent(void *ccdv, const char *name, int namlen, |
2256 | loff_t offset, u64 ino, unsigned int d_type) |
2257 | { |
2258 | struct readdir_cd *ccd = ccdv; |
2259 | struct nfsd4_readdir *cd = container_of(ccd, struct nfsd4_readdir, common); |
2260 | int buflen; |
2261 | __be32 *p = cd->buffer; |
2262 | __be32 *cookiep; |
2263 | __be32 nfserr = nfserr_toosmall; |
2264 | |
2265 | /* In nfsv4, "." and ".." never make it onto the wire.. */ |
2266 | if (name && isdotent(name, namlen)) { |
2267 | cd->common.err = nfs_ok; |
2268 | return 0; |
2269 | } |
2270 | |
2271 | if (cd->offset) |
2272 | xdr_encode_hyper(cd->offset, (u64) offset); |
2273 | |
2274 | buflen = cd->buflen - 4 - XDR_QUADLEN(namlen); |
2275 | if (buflen < 0) |
2276 | goto fail; |
2277 | |
2278 | *p++ = xdr_one; /* mark entry present */ |
2279 | cookiep = p; |
2280 | p = xdr_encode_hyper(p, NFS_OFFSET_MAX); /* offset of next entry */ |
2281 | p = xdr_encode_array(p, name, namlen); /* name length & name */ |
2282 | |
2283 | nfserr = nfsd4_encode_dirent_fattr(cd, name, namlen, p, &buflen); |
2284 | switch (nfserr) { |
2285 | case nfs_ok: |
2286 | p += buflen; |
2287 | break; |
2288 | case nfserr_resource: |
2289 | nfserr = nfserr_toosmall; |
2290 | goto fail; |
2291 | case nfserr_dropit: |
2292 | goto fail; |
2293 | case nfserr_noent: |
2294 | goto skip_entry; |
2295 | default: |
2296 | /* |
2297 | * If the client requested the RDATTR_ERROR attribute, |
2298 | * we stuff the error code into this attribute |
2299 | * and continue. If this attribute was not requested, |
2300 | * then in accordance with the spec, we fail the |
2301 | * entire READDIR operation(!) |
2302 | */ |
2303 | if (!(cd->rd_bmval[0] & FATTR4_WORD0_RDATTR_ERROR)) |
2304 | goto fail; |
2305 | p = nfsd4_encode_rdattr_error(p, buflen, nfserr); |
2306 | if (p == NULL) { |
2307 | nfserr = nfserr_toosmall; |
2308 | goto fail; |
2309 | } |
2310 | } |
2311 | cd->buflen -= (p - cd->buffer); |
2312 | cd->buffer = p; |
2313 | cd->offset = cookiep; |
2314 | skip_entry: |
2315 | cd->common.err = nfs_ok; |
2316 | return 0; |
2317 | fail: |
2318 | cd->common.err = nfserr; |
2319 | return -EINVAL; |
2320 | } |
2321 | |
2322 | static void |
2323 | nfsd4_encode_stateid(struct nfsd4_compoundres *resp, stateid_t *sid) |
2324 | { |
2325 | __be32 *p; |
2326 | |
2327 | RESERVE_SPACE(sizeof(stateid_t)); |
2328 | WRITE32(sid->si_generation); |
2329 | WRITEMEM(&sid->si_opaque, sizeof(stateid_opaque_t)); |
2330 | ADJUST_ARGS(); |
2331 | } |
2332 | |
2333 | static __be32 |
2334 | nfsd4_encode_access(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_access *access) |
2335 | { |
2336 | __be32 *p; |
2337 | |
2338 | if (!nfserr) { |
2339 | RESERVE_SPACE(8); |
2340 | WRITE32(access->ac_supported); |
2341 | WRITE32(access->ac_resp_access); |
2342 | ADJUST_ARGS(); |
2343 | } |
2344 | return nfserr; |
2345 | } |
2346 | |
2347 | static __be32 |
2348 | nfsd4_encode_close(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_close *close) |
2349 | { |
2350 | ENCODE_SEQID_OP_HEAD; |
2351 | |
2352 | if (!nfserr) |
2353 | nfsd4_encode_stateid(resp, &close->cl_stateid); |
2354 | |
2355 | ENCODE_SEQID_OP_TAIL(close->cl_stateowner); |
2356 | return nfserr; |
2357 | } |
2358 | |
2359 | |
2360 | static __be32 |
2361 | nfsd4_encode_commit(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_commit *commit) |
2362 | { |
2363 | __be32 *p; |
2364 | |
2365 | if (!nfserr) { |
2366 | RESERVE_SPACE(8); |
2367 | WRITEMEM(commit->co_verf.data, 8); |
2368 | ADJUST_ARGS(); |
2369 | } |
2370 | return nfserr; |
2371 | } |
2372 | |
2373 | static __be32 |
2374 | nfsd4_encode_create(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_create *create) |
2375 | { |
2376 | __be32 *p; |
2377 | |
2378 | if (!nfserr) { |
2379 | RESERVE_SPACE(32); |
2380 | write_cinfo(&p, &create->cr_cinfo); |
2381 | WRITE32(2); |
2382 | WRITE32(create->cr_bmval[0]); |
2383 | WRITE32(create->cr_bmval[1]); |
2384 | ADJUST_ARGS(); |
2385 | } |
2386 | return nfserr; |
2387 | } |
2388 | |
2389 | static __be32 |
2390 | nfsd4_encode_getattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_getattr *getattr) |
2391 | { |
2392 | struct svc_fh *fhp = getattr->ga_fhp; |
2393 | int buflen; |
2394 | |
2395 | if (nfserr) |
2396 | return nfserr; |
2397 | |
2398 | buflen = resp->end - resp->p - (COMPOUND_ERR_SLACK_SPACE >> 2); |
2399 | nfserr = nfsd4_encode_fattr(fhp, fhp->fh_export, fhp->fh_dentry, |
2400 | resp->p, &buflen, getattr->ga_bmval, |
2401 | resp->rqstp, 0); |
2402 | if (!nfserr) |
2403 | resp->p += buflen; |
2404 | return nfserr; |
2405 | } |
2406 | |
2407 | static __be32 |
2408 | nfsd4_encode_getfh(struct nfsd4_compoundres *resp, __be32 nfserr, struct svc_fh **fhpp) |
2409 | { |
2410 | struct svc_fh *fhp = *fhpp; |
2411 | unsigned int len; |
2412 | __be32 *p; |
2413 | |
2414 | if (!nfserr) { |
2415 | len = fhp->fh_handle.fh_size; |
2416 | RESERVE_SPACE(len + 4); |
2417 | WRITE32(len); |
2418 | WRITEMEM(&fhp->fh_handle.fh_base, len); |
2419 | ADJUST_ARGS(); |
2420 | } |
2421 | return nfserr; |
2422 | } |
2423 | |
2424 | /* |
2425 | * Including all fields other than the name, a LOCK4denied structure requires |
2426 | * 8(clientid) + 4(namelen) + 8(offset) + 8(length) + 4(type) = 32 bytes. |
2427 | */ |
2428 | static void |
2429 | nfsd4_encode_lock_denied(struct nfsd4_compoundres *resp, struct nfsd4_lock_denied *ld) |
2430 | { |
2431 | __be32 *p; |
2432 | |
2433 | RESERVE_SPACE(32 + XDR_LEN(ld->ld_sop ? ld->ld_sop->so_owner.len : 0)); |
2434 | WRITE64(ld->ld_start); |
2435 | WRITE64(ld->ld_length); |
2436 | WRITE32(ld->ld_type); |
2437 | if (ld->ld_sop) { |
2438 | WRITEMEM(&ld->ld_clientid, 8); |
2439 | WRITE32(ld->ld_sop->so_owner.len); |
2440 | WRITEMEM(ld->ld_sop->so_owner.data, ld->ld_sop->so_owner.len); |
2441 | kref_put(&ld->ld_sop->so_ref, nfs4_free_stateowner); |
2442 | } else { /* non - nfsv4 lock in conflict, no clientid nor owner */ |
2443 | WRITE64((u64)0); /* clientid */ |
2444 | WRITE32(0); /* length of owner name */ |
2445 | } |
2446 | ADJUST_ARGS(); |
2447 | } |
2448 | |
2449 | static __be32 |
2450 | nfsd4_encode_lock(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lock *lock) |
2451 | { |
2452 | ENCODE_SEQID_OP_HEAD; |
2453 | |
2454 | if (!nfserr) |
2455 | nfsd4_encode_stateid(resp, &lock->lk_resp_stateid); |
2456 | else if (nfserr == nfserr_denied) |
2457 | nfsd4_encode_lock_denied(resp, &lock->lk_denied); |
2458 | |
2459 | ENCODE_SEQID_OP_TAIL(lock->lk_replay_owner); |
2460 | return nfserr; |
2461 | } |
2462 | |
2463 | static __be32 |
2464 | nfsd4_encode_lockt(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lockt *lockt) |
2465 | { |
2466 | if (nfserr == nfserr_denied) |
2467 | nfsd4_encode_lock_denied(resp, &lockt->lt_denied); |
2468 | return nfserr; |
2469 | } |
2470 | |
2471 | static __be32 |
2472 | nfsd4_encode_locku(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_locku *locku) |
2473 | { |
2474 | ENCODE_SEQID_OP_HEAD; |
2475 | |
2476 | if (!nfserr) |
2477 | nfsd4_encode_stateid(resp, &locku->lu_stateid); |
2478 | |
2479 | ENCODE_SEQID_OP_TAIL(locku->lu_stateowner); |
2480 | return nfserr; |
2481 | } |
2482 | |
2483 | |
2484 | static __be32 |
2485 | nfsd4_encode_link(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_link *link) |
2486 | { |
2487 | __be32 *p; |
2488 | |
2489 | if (!nfserr) { |
2490 | RESERVE_SPACE(20); |
2491 | write_cinfo(&p, &link->li_cinfo); |
2492 | ADJUST_ARGS(); |
2493 | } |
2494 | return nfserr; |
2495 | } |
2496 | |
2497 | |
2498 | static __be32 |
2499 | nfsd4_encode_open(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open *open) |
2500 | { |
2501 | __be32 *p; |
2502 | ENCODE_SEQID_OP_HEAD; |
2503 | |
2504 | if (nfserr) |
2505 | goto out; |
2506 | |
2507 | nfsd4_encode_stateid(resp, &open->op_stateid); |
2508 | RESERVE_SPACE(40); |
2509 | write_cinfo(&p, &open->op_cinfo); |
2510 | WRITE32(open->op_rflags); |
2511 | WRITE32(2); |
2512 | WRITE32(open->op_bmval[0]); |
2513 | WRITE32(open->op_bmval[1]); |
2514 | WRITE32(open->op_delegate_type); |
2515 | ADJUST_ARGS(); |
2516 | |
2517 | switch (open->op_delegate_type) { |
2518 | case NFS4_OPEN_DELEGATE_NONE: |
2519 | break; |
2520 | case NFS4_OPEN_DELEGATE_READ: |
2521 | nfsd4_encode_stateid(resp, &open->op_delegate_stateid); |
2522 | RESERVE_SPACE(20); |
2523 | WRITE32(open->op_recall); |
2524 | |
2525 | /* |
2526 | * TODO: ACE's in delegations |
2527 | */ |
2528 | WRITE32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE); |
2529 | WRITE32(0); |
2530 | WRITE32(0); |
2531 | WRITE32(0); /* XXX: is NULL principal ok? */ |
2532 | ADJUST_ARGS(); |
2533 | break; |
2534 | case NFS4_OPEN_DELEGATE_WRITE: |
2535 | nfsd4_encode_stateid(resp, &open->op_delegate_stateid); |
2536 | RESERVE_SPACE(32); |
2537 | WRITE32(0); |
2538 | |
2539 | /* |
2540 | * TODO: space_limit's in delegations |
2541 | */ |
2542 | WRITE32(NFS4_LIMIT_SIZE); |
2543 | WRITE32(~(u32)0); |
2544 | WRITE32(~(u32)0); |
2545 | |
2546 | /* |
2547 | * TODO: ACE's in delegations |
2548 | */ |
2549 | WRITE32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE); |
2550 | WRITE32(0); |
2551 | WRITE32(0); |
2552 | WRITE32(0); /* XXX: is NULL principal ok? */ |
2553 | ADJUST_ARGS(); |
2554 | break; |
2555 | default: |
2556 | BUG(); |
2557 | } |
2558 | /* XXX save filehandle here */ |
2559 | out: |
2560 | ENCODE_SEQID_OP_TAIL(open->op_stateowner); |
2561 | return nfserr; |
2562 | } |
2563 | |
2564 | static __be32 |
2565 | nfsd4_encode_open_confirm(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_confirm *oc) |
2566 | { |
2567 | ENCODE_SEQID_OP_HEAD; |
2568 | |
2569 | if (!nfserr) |
2570 | nfsd4_encode_stateid(resp, &oc->oc_resp_stateid); |
2571 | |
2572 | ENCODE_SEQID_OP_TAIL(oc->oc_stateowner); |
2573 | return nfserr; |
2574 | } |
2575 | |
2576 | static __be32 |
2577 | nfsd4_encode_open_downgrade(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_downgrade *od) |
2578 | { |
2579 | ENCODE_SEQID_OP_HEAD; |
2580 | |
2581 | if (!nfserr) |
2582 | nfsd4_encode_stateid(resp, &od->od_stateid); |
2583 | |
2584 | ENCODE_SEQID_OP_TAIL(od->od_stateowner); |
2585 | return nfserr; |
2586 | } |
2587 | |
2588 | static __be32 |
2589 | nfsd4_encode_read(struct nfsd4_compoundres *resp, __be32 nfserr, |
2590 | struct nfsd4_read *read) |
2591 | { |
2592 | u32 eof; |
2593 | int v, pn; |
2594 | unsigned long maxcount; |
2595 | long len; |
2596 | __be32 *p; |
2597 | |
2598 | if (nfserr) |
2599 | return nfserr; |
2600 | if (resp->xbuf->page_len) |
2601 | return nfserr_resource; |
2602 | |
2603 | RESERVE_SPACE(8); /* eof flag and byte count */ |
2604 | |
2605 | maxcount = svc_max_payload(resp->rqstp); |
2606 | if (maxcount > read->rd_length) |
2607 | maxcount = read->rd_length; |
2608 | |
2609 | len = maxcount; |
2610 | v = 0; |
2611 | while (len > 0) { |
2612 | pn = resp->rqstp->rq_resused++; |
2613 | resp->rqstp->rq_vec[v].iov_base = |
2614 | page_address(resp->rqstp->rq_respages[pn]); |
2615 | resp->rqstp->rq_vec[v].iov_len = |
2616 | len < PAGE_SIZE ? len : PAGE_SIZE; |
2617 | v++; |
2618 | len -= PAGE_SIZE; |
2619 | } |
2620 | read->rd_vlen = v; |
2621 | |
2622 | nfserr = nfsd_read(read->rd_rqstp, read->rd_fhp, read->rd_filp, |
2623 | read->rd_offset, resp->rqstp->rq_vec, read->rd_vlen, |
2624 | &maxcount); |
2625 | |
2626 | if (nfserr == nfserr_symlink) |
2627 | nfserr = nfserr_inval; |
2628 | if (nfserr) |
2629 | return nfserr; |
2630 | eof = (read->rd_offset + maxcount >= |
2631 | read->rd_fhp->fh_dentry->d_inode->i_size); |
2632 | |
2633 | WRITE32(eof); |
2634 | WRITE32(maxcount); |
2635 | ADJUST_ARGS(); |
2636 | resp->xbuf->head[0].iov_len = (char*)p |
2637 | - (char*)resp->xbuf->head[0].iov_base; |
2638 | resp->xbuf->page_len = maxcount; |
2639 | |
2640 | /* Use rest of head for padding and remaining ops: */ |
2641 | resp->xbuf->tail[0].iov_base = p; |
2642 | resp->xbuf->tail[0].iov_len = 0; |
2643 | if (maxcount&3) { |
2644 | RESERVE_SPACE(4); |
2645 | WRITE32(0); |
2646 | resp->xbuf->tail[0].iov_base += maxcount&3; |
2647 | resp->xbuf->tail[0].iov_len = 4 - (maxcount&3); |
2648 | ADJUST_ARGS(); |
2649 | } |
2650 | return 0; |
2651 | } |
2652 | |
2653 | static __be32 |
2654 | nfsd4_encode_readlink(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readlink *readlink) |
2655 | { |
2656 | int maxcount; |
2657 | char *page; |
2658 | __be32 *p; |
2659 | |
2660 | if (nfserr) |
2661 | return nfserr; |
2662 | if (resp->xbuf->page_len) |
2663 | return nfserr_resource; |
2664 | |
2665 | page = page_address(resp->rqstp->rq_respages[resp->rqstp->rq_resused++]); |
2666 | |
2667 | maxcount = PAGE_SIZE; |
2668 | RESERVE_SPACE(4); |
2669 | |
2670 | /* |
2671 | * XXX: By default, the ->readlink() VFS op will truncate symlinks |
2672 | * if they would overflow the buffer. Is this kosher in NFSv4? If |
2673 | * not, one easy fix is: if ->readlink() precisely fills the buffer, |
2674 | * assume that truncation occurred, and return NFS4ERR_RESOURCE. |
2675 | */ |
2676 | nfserr = nfsd_readlink(readlink->rl_rqstp, readlink->rl_fhp, page, &maxcount); |
2677 | if (nfserr == nfserr_isdir) |
2678 | return nfserr_inval; |
2679 | if (nfserr) |
2680 | return nfserr; |
2681 | |
2682 | WRITE32(maxcount); |
2683 | ADJUST_ARGS(); |
2684 | resp->xbuf->head[0].iov_len = (char*)p |
2685 | - (char*)resp->xbuf->head[0].iov_base; |
2686 | resp->xbuf->page_len = maxcount; |
2687 | |
2688 | /* Use rest of head for padding and remaining ops: */ |
2689 | resp->xbuf->tail[0].iov_base = p; |
2690 | resp->xbuf->tail[0].iov_len = 0; |
2691 | if (maxcount&3) { |
2692 | RESERVE_SPACE(4); |
2693 | WRITE32(0); |
2694 | resp->xbuf->tail[0].iov_base += maxcount&3; |
2695 | resp->xbuf->tail[0].iov_len = 4 - (maxcount&3); |
2696 | ADJUST_ARGS(); |
2697 | } |
2698 | return 0; |
2699 | } |
2700 | |
2701 | static __be32 |
2702 | nfsd4_encode_readdir(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readdir *readdir) |
2703 | { |
2704 | int maxcount; |
2705 | loff_t offset; |
2706 | __be32 *page, *savep, *tailbase; |
2707 | __be32 *p; |
2708 | |
2709 | if (nfserr) |
2710 | return nfserr; |
2711 | if (resp->xbuf->page_len) |
2712 | return nfserr_resource; |
2713 | |
2714 | RESERVE_SPACE(8); /* verifier */ |
2715 | savep = p; |
2716 | |
2717 | /* XXX: Following NFSv3, we ignore the READDIR verifier for now. */ |
2718 | WRITE32(0); |
2719 | WRITE32(0); |
2720 | ADJUST_ARGS(); |
2721 | resp->xbuf->head[0].iov_len = ((char*)resp->p) - (char*)resp->xbuf->head[0].iov_base; |
2722 | tailbase = p; |
2723 | |
2724 | maxcount = PAGE_SIZE; |
2725 | if (maxcount > readdir->rd_maxcount) |
2726 | maxcount = readdir->rd_maxcount; |
2727 | |
2728 | /* |
2729 | * Convert from bytes to words, account for the two words already |
2730 | * written, make sure to leave two words at the end for the next |
2731 | * pointer and eof field. |
2732 | */ |
2733 | maxcount = (maxcount >> 2) - 4; |
2734 | if (maxcount < 0) { |
2735 | nfserr = nfserr_toosmall; |
2736 | goto err_no_verf; |
2737 | } |
2738 | |
2739 | page = page_address(resp->rqstp->rq_respages[resp->rqstp->rq_resused++]); |
2740 | readdir->common.err = 0; |
2741 | readdir->buflen = maxcount; |
2742 | readdir->buffer = page; |
2743 | readdir->offset = NULL; |
2744 | |
2745 | offset = readdir->rd_cookie; |
2746 | nfserr = nfsd_readdir(readdir->rd_rqstp, readdir->rd_fhp, |
2747 | &offset, |
2748 | &readdir->common, nfsd4_encode_dirent); |
2749 | if (nfserr == nfs_ok && |
2750 | readdir->common.err == nfserr_toosmall && |
2751 | readdir->buffer == page) |
2752 | nfserr = nfserr_toosmall; |
2753 | if (nfserr == nfserr_symlink) |
2754 | nfserr = nfserr_notdir; |
2755 | if (nfserr) |
2756 | goto err_no_verf; |
2757 | |
2758 | if (readdir->offset) |
2759 | xdr_encode_hyper(readdir->offset, offset); |
2760 | |
2761 | p = readdir->buffer; |
2762 | *p++ = 0; /* no more entries */ |
2763 | *p++ = htonl(readdir->common.err == nfserr_eof); |
2764 | resp->xbuf->page_len = ((char*)p) - (char*)page_address( |
2765 | resp->rqstp->rq_respages[resp->rqstp->rq_resused-1]); |
2766 | |
2767 | /* Use rest of head for padding and remaining ops: */ |
2768 | resp->xbuf->tail[0].iov_base = tailbase; |
2769 | resp->xbuf->tail[0].iov_len = 0; |
2770 | resp->p = resp->xbuf->tail[0].iov_base; |
2771 | resp->end = resp->p + (PAGE_SIZE - resp->xbuf->head[0].iov_len)/4; |
2772 | |
2773 | return 0; |
2774 | err_no_verf: |
2775 | p = savep; |
2776 | ADJUST_ARGS(); |
2777 | return nfserr; |
2778 | } |
2779 | |
2780 | static __be32 |
2781 | nfsd4_encode_remove(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_remove *remove) |
2782 | { |
2783 | __be32 *p; |
2784 | |
2785 | if (!nfserr) { |
2786 | RESERVE_SPACE(20); |
2787 | write_cinfo(&p, &remove->rm_cinfo); |
2788 | ADJUST_ARGS(); |
2789 | } |
2790 | return nfserr; |
2791 | } |
2792 | |
2793 | static __be32 |
2794 | nfsd4_encode_rename(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_rename *rename) |
2795 | { |
2796 | __be32 *p; |
2797 | |
2798 | if (!nfserr) { |
2799 | RESERVE_SPACE(40); |
2800 | write_cinfo(&p, &rename->rn_sinfo); |
2801 | write_cinfo(&p, &rename->rn_tinfo); |
2802 | ADJUST_ARGS(); |
2803 | } |
2804 | return nfserr; |
2805 | } |
2806 | |
2807 | static __be32 |
2808 | nfsd4_encode_secinfo(struct nfsd4_compoundres *resp, __be32 nfserr, |
2809 | struct nfsd4_secinfo *secinfo) |
2810 | { |
2811 | int i = 0; |
2812 | struct svc_export *exp = secinfo->si_exp; |
2813 | u32 nflavs; |
2814 | struct exp_flavor_info *flavs; |
2815 | struct exp_flavor_info def_flavs[2]; |
2816 | __be32 *p; |
2817 | |
2818 | if (nfserr) |
2819 | goto out; |
2820 | if (exp->ex_nflavors) { |
2821 | flavs = exp->ex_flavors; |
2822 | nflavs = exp->ex_nflavors; |
2823 | } else { /* Handling of some defaults in absence of real secinfo: */ |
2824 | flavs = def_flavs; |
2825 | if (exp->ex_client->flavour->flavour == RPC_AUTH_UNIX) { |
2826 | nflavs = 2; |
2827 | flavs[0].pseudoflavor = RPC_AUTH_UNIX; |
2828 | flavs[1].pseudoflavor = RPC_AUTH_NULL; |
2829 | } else if (exp->ex_client->flavour->flavour == RPC_AUTH_GSS) { |
2830 | nflavs = 1; |
2831 | flavs[0].pseudoflavor |
2832 | = svcauth_gss_flavor(exp->ex_client); |
2833 | } else { |
2834 | nflavs = 1; |
2835 | flavs[0].pseudoflavor |
2836 | = exp->ex_client->flavour->flavour; |
2837 | } |
2838 | } |
2839 | |
2840 | RESERVE_SPACE(4); |
2841 | WRITE32(nflavs); |
2842 | ADJUST_ARGS(); |
2843 | for (i = 0; i < nflavs; i++) { |
2844 | u32 flav = flavs[i].pseudoflavor; |
2845 | struct gss_api_mech *gm = gss_mech_get_by_pseudoflavor(flav); |
2846 | |
2847 | if (gm) { |
2848 | RESERVE_SPACE(4); |
2849 | WRITE32(RPC_AUTH_GSS); |
2850 | ADJUST_ARGS(); |
2851 | RESERVE_SPACE(4 + gm->gm_oid.len); |
2852 | WRITE32(gm->gm_oid.len); |
2853 | WRITEMEM(gm->gm_oid.data, gm->gm_oid.len); |
2854 | ADJUST_ARGS(); |
2855 | RESERVE_SPACE(4); |
2856 | WRITE32(0); /* qop */ |
2857 | ADJUST_ARGS(); |
2858 | RESERVE_SPACE(4); |
2859 | WRITE32(gss_pseudoflavor_to_service(gm, flav)); |
2860 | ADJUST_ARGS(); |
2861 | gss_mech_put(gm); |
2862 | } else { |
2863 | RESERVE_SPACE(4); |
2864 | WRITE32(flav); |
2865 | ADJUST_ARGS(); |
2866 | } |
2867 | } |
2868 | out: |
2869 | if (exp) |
2870 | exp_put(exp); |
2871 | return nfserr; |
2872 | } |
2873 | |
2874 | /* |
2875 | * The SETATTR encode routine is special -- it always encodes a bitmap, |
2876 | * regardless of the error status. |
2877 | */ |
2878 | static __be32 |
2879 | nfsd4_encode_setattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setattr *setattr) |
2880 | { |
2881 | __be32 *p; |
2882 | |
2883 | RESERVE_SPACE(12); |
2884 | if (nfserr) { |
2885 | WRITE32(2); |
2886 | WRITE32(0); |
2887 | WRITE32(0); |
2888 | } |
2889 | else { |
2890 | WRITE32(2); |
2891 | WRITE32(setattr->sa_bmval[0]); |
2892 | WRITE32(setattr->sa_bmval[1]); |
2893 | } |
2894 | ADJUST_ARGS(); |
2895 | return nfserr; |
2896 | } |
2897 | |
2898 | static __be32 |
2899 | nfsd4_encode_setclientid(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setclientid *scd) |
2900 | { |
2901 | __be32 *p; |
2902 | |
2903 | if (!nfserr) { |
2904 | RESERVE_SPACE(8 + sizeof(nfs4_verifier)); |
2905 | WRITEMEM(&scd->se_clientid, 8); |
2906 | WRITEMEM(&scd->se_confirm, sizeof(nfs4_verifier)); |
2907 | ADJUST_ARGS(); |
2908 | } |
2909 | else if (nfserr == nfserr_clid_inuse) { |
2910 | RESERVE_SPACE(8); |
2911 | WRITE32(0); |
2912 | WRITE32(0); |
2913 | ADJUST_ARGS(); |
2914 | } |
2915 | return nfserr; |
2916 | } |
2917 | |
2918 | static __be32 |
2919 | nfsd4_encode_write(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_write *write) |
2920 | { |
2921 | __be32 *p; |
2922 | |
2923 | if (!nfserr) { |
2924 | RESERVE_SPACE(16); |
2925 | WRITE32(write->wr_bytes_written); |
2926 | WRITE32(write->wr_how_written); |
2927 | WRITEMEM(write->wr_verifier.data, 8); |
2928 | ADJUST_ARGS(); |
2929 | } |
2930 | return nfserr; |
2931 | } |
2932 | |
2933 | static __be32 |
2934 | nfsd4_encode_exchange_id(struct nfsd4_compoundres *resp, int nfserr, |
2935 | struct nfsd4_exchange_id *exid) |
2936 | { |
2937 | __be32 *p; |
2938 | char *major_id; |
2939 | char *server_scope; |
2940 | int major_id_sz; |
2941 | int server_scope_sz; |
2942 | uint64_t minor_id = 0; |
2943 | |
2944 | if (nfserr) |
2945 | return nfserr; |
2946 | |
2947 | major_id = utsname()->nodename; |
2948 | major_id_sz = strlen(major_id); |
2949 | server_scope = utsname()->nodename; |
2950 | server_scope_sz = strlen(server_scope); |
2951 | |
2952 | RESERVE_SPACE( |
2953 | 8 /* eir_clientid */ + |
2954 | 4 /* eir_sequenceid */ + |
2955 | 4 /* eir_flags */ + |
2956 | 4 /* spr_how (SP4_NONE) */ + |
2957 | 8 /* so_minor_id */ + |
2958 | 4 /* so_major_id.len */ + |
2959 | (XDR_QUADLEN(major_id_sz) * 4) + |
2960 | 4 /* eir_server_scope.len */ + |
2961 | (XDR_QUADLEN(server_scope_sz) * 4) + |
2962 | 4 /* eir_server_impl_id.count (0) */); |
2963 | |
2964 | WRITEMEM(&exid->clientid, 8); |
2965 | WRITE32(exid->seqid); |
2966 | WRITE32(exid->flags); |
2967 | |
2968 | /* state_protect4_r. Currently only support SP4_NONE */ |
2969 | BUG_ON(exid->spa_how != SP4_NONE); |
2970 | WRITE32(exid->spa_how); |
2971 | |
2972 | /* The server_owner struct */ |
2973 | WRITE64(minor_id); /* Minor id */ |
2974 | /* major id */ |
2975 | WRITE32(major_id_sz); |
2976 | WRITEMEM(major_id, major_id_sz); |
2977 | |
2978 | /* Server scope */ |
2979 | WRITE32(server_scope_sz); |
2980 | WRITEMEM(server_scope, server_scope_sz); |
2981 | |
2982 | /* Implementation id */ |
2983 | WRITE32(0); /* zero length nfs_impl_id4 array */ |
2984 | ADJUST_ARGS(); |
2985 | return 0; |
2986 | } |
2987 | |
2988 | static __be32 |
2989 | nfsd4_encode_create_session(struct nfsd4_compoundres *resp, int nfserr, |
2990 | struct nfsd4_create_session *sess) |
2991 | { |
2992 | __be32 *p; |
2993 | |
2994 | if (nfserr) |
2995 | return nfserr; |
2996 | |
2997 | RESERVE_SPACE(24); |
2998 | WRITEMEM(sess->sessionid.data, NFS4_MAX_SESSIONID_LEN); |
2999 | WRITE32(sess->seqid); |
3000 | WRITE32(sess->flags); |
3001 | ADJUST_ARGS(); |
3002 | |
3003 | RESERVE_SPACE(28); |
3004 | WRITE32(0); /* headerpadsz */ |
3005 | WRITE32(sess->fore_channel.maxreq_sz); |
3006 | WRITE32(sess->fore_channel.maxresp_sz); |
3007 | WRITE32(sess->fore_channel.maxresp_cached); |
3008 | WRITE32(sess->fore_channel.maxops); |
3009 | WRITE32(sess->fore_channel.maxreqs); |
3010 | WRITE32(sess->fore_channel.nr_rdma_attrs); |
3011 | ADJUST_ARGS(); |
3012 | |
3013 | if (sess->fore_channel.nr_rdma_attrs) { |
3014 | RESERVE_SPACE(4); |
3015 | WRITE32(sess->fore_channel.rdma_attrs); |
3016 | ADJUST_ARGS(); |
3017 | } |
3018 | |
3019 | RESERVE_SPACE(28); |
3020 | WRITE32(0); /* headerpadsz */ |
3021 | WRITE32(sess->back_channel.maxreq_sz); |
3022 | WRITE32(sess->back_channel.maxresp_sz); |
3023 | WRITE32(sess->back_channel.maxresp_cached); |
3024 | WRITE32(sess->back_channel.maxops); |
3025 | WRITE32(sess->back_channel.maxreqs); |
3026 | WRITE32(sess->back_channel.nr_rdma_attrs); |
3027 | ADJUST_ARGS(); |
3028 | |
3029 | if (sess->back_channel.nr_rdma_attrs) { |
3030 | RESERVE_SPACE(4); |
3031 | WRITE32(sess->back_channel.rdma_attrs); |
3032 | ADJUST_ARGS(); |
3033 | } |
3034 | return 0; |
3035 | } |
3036 | |
3037 | static __be32 |
3038 | nfsd4_encode_destroy_session(struct nfsd4_compoundres *resp, int nfserr, |
3039 | struct nfsd4_destroy_session *destroy_session) |
3040 | { |
3041 | return nfserr; |
3042 | } |
3043 | |
3044 | __be32 |
3045 | nfsd4_encode_sequence(struct nfsd4_compoundres *resp, int nfserr, |
3046 | struct nfsd4_sequence *seq) |
3047 | { |
3048 | __be32 *p; |
3049 | |
3050 | if (nfserr) |
3051 | return nfserr; |
3052 | |
3053 | RESERVE_SPACE(NFS4_MAX_SESSIONID_LEN + 20); |
3054 | WRITEMEM(seq->sessionid.data, NFS4_MAX_SESSIONID_LEN); |
3055 | WRITE32(seq->seqid); |
3056 | WRITE32(seq->slotid); |
3057 | WRITE32(seq->maxslots); |
3058 | /* |
3059 | * FIXME: for now: |
3060 | * target_maxslots = maxslots |
3061 | * status_flags = 0 |
3062 | */ |
3063 | WRITE32(seq->maxslots); |
3064 | WRITE32(0); |
3065 | |
3066 | ADJUST_ARGS(); |
3067 | return 0; |
3068 | } |
3069 | |
3070 | static __be32 |
3071 | nfsd4_encode_noop(struct nfsd4_compoundres *resp, __be32 nfserr, void *p) |
3072 | { |
3073 | return nfserr; |
3074 | } |
3075 | |
3076 | typedef __be32(* nfsd4_enc)(struct nfsd4_compoundres *, __be32, void *); |
3077 | |
3078 | /* |
3079 | * Note: nfsd4_enc_ops vector is shared for v4.0 and v4.1 |
3080 | * since we don't need to filter out obsolete ops as this is |
3081 | * done in the decoding phase. |
3082 | */ |
3083 | static nfsd4_enc nfsd4_enc_ops[] = { |
3084 | [OP_ACCESS] = (nfsd4_enc)nfsd4_encode_access, |
3085 | [OP_CLOSE] = (nfsd4_enc)nfsd4_encode_close, |
3086 | [OP_COMMIT] = (nfsd4_enc)nfsd4_encode_commit, |
3087 | [OP_CREATE] = (nfsd4_enc)nfsd4_encode_create, |
3088 | [OP_DELEGPURGE] = (nfsd4_enc)nfsd4_encode_noop, |
3089 | [OP_DELEGRETURN] = (nfsd4_enc)nfsd4_encode_noop, |
3090 | [OP_GETATTR] = (nfsd4_enc)nfsd4_encode_getattr, |
3091 | [OP_GETFH] = (nfsd4_enc)nfsd4_encode_getfh, |
3092 | [OP_LINK] = (nfsd4_enc)nfsd4_encode_link, |
3093 | [OP_LOCK] = (nfsd4_enc)nfsd4_encode_lock, |
3094 | [OP_LOCKT] = (nfsd4_enc)nfsd4_encode_lockt, |
3095 | [OP_LOCKU] = (nfsd4_enc)nfsd4_encode_locku, |
3096 | [OP_LOOKUP] = (nfsd4_enc)nfsd4_encode_noop, |
3097 | [OP_LOOKUPP] = (nfsd4_enc)nfsd4_encode_noop, |
3098 | [OP_NVERIFY] = (nfsd4_enc)nfsd4_encode_noop, |
3099 | [OP_OPEN] = (nfsd4_enc)nfsd4_encode_open, |
3100 | [OP_OPENATTR] = (nfsd4_enc)nfsd4_encode_noop, |
3101 | [OP_OPEN_CONFIRM] = (nfsd4_enc)nfsd4_encode_open_confirm, |
3102 | [OP_OPEN_DOWNGRADE] = (nfsd4_enc)nfsd4_encode_open_downgrade, |
3103 | [OP_PUTFH] = (nfsd4_enc)nfsd4_encode_noop, |
3104 | [OP_PUTPUBFH] = (nfsd4_enc)nfsd4_encode_noop, |
3105 | [OP_PUTROOTFH] = (nfsd4_enc)nfsd4_encode_noop, |
3106 | [OP_READ] = (nfsd4_enc)nfsd4_encode_read, |
3107 | [OP_READDIR] = (nfsd4_enc)nfsd4_encode_readdir, |
3108 | [OP_READLINK] = (nfsd4_enc)nfsd4_encode_readlink, |
3109 | [OP_REMOVE] = (nfsd4_enc)nfsd4_encode_remove, |
3110 | [OP_RENAME] = (nfsd4_enc)nfsd4_encode_rename, |
3111 | [OP_RENEW] = (nfsd4_enc)nfsd4_encode_noop, |
3112 | [OP_RESTOREFH] = (nfsd4_enc)nfsd4_encode_noop, |
3113 | [OP_SAVEFH] = (nfsd4_enc)nfsd4_encode_noop, |
3114 | [OP_SECINFO] = (nfsd4_enc)nfsd4_encode_secinfo, |
3115 | [OP_SETATTR] = (nfsd4_enc)nfsd4_encode_setattr, |
3116 | [OP_SETCLIENTID] = (nfsd4_enc)nfsd4_encode_setclientid, |
3117 | [OP_SETCLIENTID_CONFIRM] = (nfsd4_enc)nfsd4_encode_noop, |
3118 | [OP_VERIFY] = (nfsd4_enc)nfsd4_encode_noop, |
3119 | [OP_WRITE] = (nfsd4_enc)nfsd4_encode_write, |
3120 | [OP_RELEASE_LOCKOWNER] = (nfsd4_enc)nfsd4_encode_noop, |
3121 | |
3122 | /* NFSv4.1 operations */ |
3123 | [OP_BACKCHANNEL_CTL] = (nfsd4_enc)nfsd4_encode_noop, |
3124 | [OP_BIND_CONN_TO_SESSION] = (nfsd4_enc)nfsd4_encode_noop, |
3125 | [OP_EXCHANGE_ID] = (nfsd4_enc)nfsd4_encode_exchange_id, |
3126 | [OP_CREATE_SESSION] = (nfsd4_enc)nfsd4_encode_create_session, |
3127 | [OP_DESTROY_SESSION] = (nfsd4_enc)nfsd4_encode_destroy_session, |
3128 | [OP_FREE_STATEID] = (nfsd4_enc)nfsd4_encode_noop, |
3129 | [OP_GET_DIR_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop, |
3130 | [OP_GETDEVICEINFO] = (nfsd4_enc)nfsd4_encode_noop, |
3131 | [OP_GETDEVICELIST] = (nfsd4_enc)nfsd4_encode_noop, |
3132 | [OP_LAYOUTCOMMIT] = (nfsd4_enc)nfsd4_encode_noop, |
3133 | [OP_LAYOUTGET] = (nfsd4_enc)nfsd4_encode_noop, |
3134 | [OP_LAYOUTRETURN] = (nfsd4_enc)nfsd4_encode_noop, |
3135 | [OP_SECINFO_NO_NAME] = (nfsd4_enc)nfsd4_encode_noop, |
3136 | [OP_SEQUENCE] = (nfsd4_enc)nfsd4_encode_sequence, |
3137 | [OP_SET_SSV] = (nfsd4_enc)nfsd4_encode_noop, |
3138 | [OP_TEST_STATEID] = (nfsd4_enc)nfsd4_encode_noop, |
3139 | [OP_WANT_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop, |
3140 | [OP_DESTROY_CLIENTID] = (nfsd4_enc)nfsd4_encode_noop, |
3141 | [OP_RECLAIM_COMPLETE] = (nfsd4_enc)nfsd4_encode_noop, |
3142 | }; |
3143 | |
3144 | /* |
3145 | * Calculate the total amount of memory that the compound response has taken |
3146 | * after encoding the current operation. |
3147 | * |
3148 | * pad: add on 8 bytes for the next operation's op_code and status so that |
3149 | * there is room to cache a failure on the next operation. |
3150 | * |
3151 | * Compare this length to the session se_fmaxresp_cached. |
3152 | * |
3153 | * Our se_fmaxresp_cached will always be a multiple of PAGE_SIZE, and so |
3154 | * will be at least a page and will therefore hold the xdr_buf head. |
3155 | */ |
3156 | static int nfsd4_check_drc_limit(struct nfsd4_compoundres *resp) |
3157 | { |
3158 | int status = 0; |
3159 | struct xdr_buf *xb = &resp->rqstp->rq_res; |
3160 | struct nfsd4_compoundargs *args = resp->rqstp->rq_argp; |
3161 | struct nfsd4_session *session = NULL; |
3162 | struct nfsd4_slot *slot = resp->cstate.slot; |
3163 | u32 length, tlen = 0, pad = 8; |
3164 | |
3165 | if (!nfsd4_has_session(&resp->cstate)) |
3166 | return status; |
3167 | |
3168 | session = resp->cstate.session; |
3169 | if (session == NULL || slot->sl_cache_entry.ce_cachethis == 0) |
3170 | return status; |
3171 | |
3172 | if (resp->opcnt >= args->opcnt) |
3173 | pad = 0; /* this is the last operation */ |
3174 | |
3175 | if (xb->page_len == 0) { |
3176 | length = (char *)resp->p - (char *)xb->head[0].iov_base + pad; |
3177 | } else { |
3178 | if (xb->tail[0].iov_base && xb->tail[0].iov_len > 0) |
3179 | tlen = (char *)resp->p - (char *)xb->tail[0].iov_base; |
3180 | |
3181 | length = xb->head[0].iov_len + xb->page_len + tlen + pad; |
3182 | } |
3183 | dprintk("%s length %u, xb->page_len %u tlen %u pad %u\n", __func__, |
3184 | length, xb->page_len, tlen, pad); |
3185 | |
3186 | if (length <= session->se_fchannel.maxresp_cached) |
3187 | return status; |
3188 | else |
3189 | return nfserr_rep_too_big_to_cache; |
3190 | } |
3191 | |
3192 | void |
3193 | nfsd4_encode_operation(struct nfsd4_compoundres *resp, struct nfsd4_op *op) |
3194 | { |
3195 | __be32 *statp; |
3196 | __be32 *p; |
3197 | |
3198 | RESERVE_SPACE(8); |
3199 | WRITE32(op->opnum); |
3200 | statp = p++; /* to be backfilled at the end */ |
3201 | ADJUST_ARGS(); |
3202 | |
3203 | if (op->opnum == OP_ILLEGAL) |
3204 | goto status; |
3205 | BUG_ON(op->opnum < 0 || op->opnum >= ARRAY_SIZE(nfsd4_enc_ops) || |
3206 | !nfsd4_enc_ops[op->opnum]); |
3207 | op->status = nfsd4_enc_ops[op->opnum](resp, op->status, &op->u); |
3208 | /* nfsd4_check_drc_limit guarantees enough room for error status */ |
3209 | if (!op->status && nfsd4_check_drc_limit(resp)) |
3210 | op->status = nfserr_rep_too_big_to_cache; |
3211 | status: |
3212 | /* |
3213 | * Note: We write the status directly, instead of using WRITE32(), |
3214 | * since it is already in network byte order. |
3215 | */ |
3216 | *statp = op->status; |
3217 | } |
3218 | |
3219 | /* |
3220 | * Encode the reply stored in the stateowner reply cache |
3221 | * |
3222 | * XDR note: do not encode rp->rp_buflen: the buffer contains the |
3223 | * previously sent already encoded operation. |
3224 | * |
3225 | * called with nfs4_lock_state() held |
3226 | */ |
3227 | void |
3228 | nfsd4_encode_replay(struct nfsd4_compoundres *resp, struct nfsd4_op *op) |
3229 | { |
3230 | __be32 *p; |
3231 | struct nfs4_replay *rp = op->replay; |
3232 | |
3233 | BUG_ON(!rp); |
3234 | |
3235 | RESERVE_SPACE(8); |
3236 | WRITE32(op->opnum); |
3237 | *p++ = rp->rp_status; /* already xdr'ed */ |
3238 | ADJUST_ARGS(); |
3239 | |
3240 | RESERVE_SPACE(rp->rp_buflen); |
3241 | WRITEMEM(rp->rp_buf, rp->rp_buflen); |
3242 | ADJUST_ARGS(); |
3243 | } |
3244 | |
3245 | int |
3246 | nfs4svc_encode_voidres(struct svc_rqst *rqstp, __be32 *p, void *dummy) |
3247 | { |
3248 | return xdr_ressize_check(rqstp, p); |
3249 | } |
3250 | |
3251 | void nfsd4_release_compoundargs(struct nfsd4_compoundargs *args) |
3252 | { |
3253 | if (args->ops != args->iops) { |
3254 | kfree(args->ops); |
3255 | args->ops = args->iops; |
3256 | } |
3257 | kfree(args->tmpp); |
3258 | args->tmpp = NULL; |
3259 | while (args->to_free) { |
3260 | struct tmpbuf *tb = args->to_free; |
3261 | args->to_free = tb->next; |
3262 | tb->release(tb->buf); |
3263 | kfree(tb); |
3264 | } |
3265 | } |
3266 | |
3267 | int |
3268 | nfs4svc_decode_compoundargs(struct svc_rqst *rqstp, __be32 *p, struct nfsd4_compoundargs *args) |
3269 | { |
3270 | __be32 status; |
3271 | |
3272 | args->p = p; |
3273 | args->end = rqstp->rq_arg.head[0].iov_base + rqstp->rq_arg.head[0].iov_len; |
3274 | args->pagelist = rqstp->rq_arg.pages; |
3275 | args->pagelen = rqstp->rq_arg.page_len; |
3276 | args->tmpp = NULL; |
3277 | args->to_free = NULL; |
3278 | args->ops = args->iops; |
3279 | args->rqstp = rqstp; |
3280 | |
3281 | status = nfsd4_decode_compound(args); |
3282 | if (status) { |
3283 | nfsd4_release_compoundargs(args); |
3284 | } |
3285 | return !status; |
3286 | } |
3287 | |
3288 | int |
3289 | nfs4svc_encode_compoundres(struct svc_rqst *rqstp, __be32 *p, struct nfsd4_compoundres *resp) |
3290 | { |
3291 | /* |
3292 | * All that remains is to write the tag and operation count... |
3293 | */ |
3294 | struct kvec *iov; |
3295 | p = resp->tagp; |
3296 | *p++ = htonl(resp->taglen); |
3297 | memcpy(p, resp->tag, resp->taglen); |
3298 | p += XDR_QUADLEN(resp->taglen); |
3299 | *p++ = htonl(resp->opcnt); |
3300 | |
3301 | if (rqstp->rq_res.page_len) |
3302 | iov = &rqstp->rq_res.tail[0]; |
3303 | else |
3304 | iov = &rqstp->rq_res.head[0]; |
3305 | iov->iov_len = ((char*)resp->p) - (char*)iov->iov_base; |
3306 | BUG_ON(iov->iov_len > PAGE_SIZE); |
3307 | if (nfsd4_has_session(&resp->cstate)) { |
3308 | if (resp->cstate.status == nfserr_replay_cache && |
3309 | !nfsd4_not_cached(resp)) { |
3310 | iov->iov_len = resp->cstate.iovlen; |
3311 | } else { |
3312 | nfsd4_store_cache_entry(resp); |
3313 | dprintk("%s: SET SLOT STATE TO AVAILABLE\n", __func__); |
3314 | resp->cstate.slot->sl_inuse = 0; |
3315 | } |
3316 | if (resp->cstate.session) |
3317 | nfsd4_put_session(resp->cstate.session); |
3318 | } |
3319 | return 1; |
3320 | } |
3321 | |
3322 | /* |
3323 | * Local variables: |
3324 | * c-basic-offset: 8 |
3325 | * End: |
3326 | */ |
3327 |
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Tags:
od-2011-09-04
od-2011-09-18
v2.6.34-rc5
v2.6.34-rc6
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v3.9