Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * fs/nfs/nfs4xdr.c | |
3 | * | |
4 | * Server-side XDR for NFSv4 | |
5 | * | |
6 | * Copyright (c) 2002 The Regents of the University of Michigan. | |
7 | * All rights reserved. | |
8 | * | |
9 | * Kendrick Smith <kmsmith@umich.edu> | |
10 | * Andy Adamson <andros@umich.edu> | |
11 | * | |
12 | * Redistribution and use in source and binary forms, with or without | |
13 | * modification, are permitted provided that the following conditions | |
14 | * are met: | |
15 | * | |
16 | * 1. Redistributions of source code must retain the above copyright | |
17 | * notice, this list of conditions and the following disclaimer. | |
18 | * 2. Redistributions in binary form must reproduce the above copyright | |
19 | * notice, this list of conditions and the following disclaimer in the | |
20 | * documentation and/or other materials provided with the distribution. | |
21 | * 3. Neither the name of the University nor the names of its | |
22 | * contributors may be used to endorse or promote products derived | |
23 | * from this software without specific prior written permission. | |
24 | * | |
25 | * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED | |
26 | * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF | |
27 | * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE | |
28 | * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE | |
29 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR | |
30 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF | |
31 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR | |
32 | * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF | |
33 | * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING | |
34 | * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS | |
35 | * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
36 | * | |
37 | * TODO: Neil Brown made the following observation: We currently | |
38 | * initially reserve NFSD_BUFSIZE space on the transmit queue and | |
39 | * never release any of that until the request is complete. | |
40 | * It would be good to calculate a new maximum response size while | |
41 | * decoding the COMPOUND, and call svc_reserve with this number | |
42 | * at the end of nfs4svc_decode_compoundargs. | |
43 | */ | |
44 | ||
45 | #include <linux/param.h> | |
46 | #include <linux/smp.h> | |
47 | #include <linux/smp_lock.h> | |
48 | #include <linux/fs.h> | |
49 | #include <linux/namei.h> | |
50 | #include <linux/vfs.h> | |
51 | #include <linux/sunrpc/xdr.h> | |
52 | #include <linux/sunrpc/svc.h> | |
53 | #include <linux/sunrpc/clnt.h> | |
54 | #include <linux/nfsd/nfsd.h> | |
55 | #include <linux/nfsd/state.h> | |
56 | #include <linux/nfsd/xdr4.h> | |
57 | #include <linux/nfsd_idmap.h> | |
58 | #include <linux/nfs4.h> | |
59 | #include <linux/nfs4_acl.h> | |
60 | ||
61 | #define NFSDDBG_FACILITY NFSDDBG_XDR | |
62 | ||
63 | static int | |
64 | check_filename(char *str, int len, int err) | |
65 | { | |
66 | int i; | |
67 | ||
68 | if (len == 0) | |
69 | return nfserr_inval; | |
70 | if (isdotent(str, len)) | |
71 | return err; | |
72 | for (i = 0; i < len; i++) | |
73 | if (str[i] == '/') | |
74 | return err; | |
75 | return 0; | |
76 | } | |
77 | ||
78 | /* | |
79 | * START OF "GENERIC" DECODE ROUTINES. | |
80 | * These may look a little ugly since they are imported from a "generic" | |
81 | * set of XDR encode/decode routines which are intended to be shared by | |
82 | * all of our NFSv4 implementations (OpenBSD, MacOS X...). | |
83 | * | |
84 | * If the pain of reading these is too great, it should be a straightforward | |
85 | * task to translate them into Linux-specific versions which are more | |
86 | * consistent with the style used in NFSv2/v3... | |
87 | */ | |
88 | #define DECODE_HEAD \ | |
89 | u32 *p; \ | |
90 | int status | |
91 | #define DECODE_TAIL \ | |
92 | status = 0; \ | |
93 | out: \ | |
94 | return status; \ | |
95 | xdr_error: \ | |
96 | printk(KERN_NOTICE "xdr error! (%s:%d)\n", __FILE__, __LINE__); \ | |
97 | status = nfserr_bad_xdr; \ | |
98 | goto out | |
99 | ||
100 | #define READ32(x) (x) = ntohl(*p++) | |
101 | #define READ64(x) do { \ | |
102 | (x) = (u64)ntohl(*p++) << 32; \ | |
103 | (x) |= ntohl(*p++); \ | |
104 | } while (0) | |
105 | #define READTIME(x) do { \ | |
106 | p++; \ | |
107 | (x) = ntohl(*p++); \ | |
108 | p++; \ | |
109 | } while (0) | |
110 | #define READMEM(x,nbytes) do { \ | |
111 | x = (char *)p; \ | |
112 | p += XDR_QUADLEN(nbytes); \ | |
113 | } while (0) | |
114 | #define SAVEMEM(x,nbytes) do { \ | |
115 | if (!(x = (p==argp->tmp || p == argp->tmpp) ? \ | |
116 | savemem(argp, p, nbytes) : \ | |
117 | (char *)p)) { \ | |
118 | printk(KERN_NOTICE "xdr error! (%s:%d)\n", __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 | printk(KERN_NOTICE "xdr error! (%s:%d)\n", __FILE__, __LINE__); \ | |
135 | goto xdr_error; \ | |
136 | } \ | |
137 | } while (0) | |
138 | ||
fd39ca9a | 139 | static u32 *read_buf(struct nfsd4_compoundargs *argp, int nbytes) |
1da177e4 LT |
140 | { |
141 | /* We want more bytes than seem to be available. | |
142 | * Maybe we need a new page, maybe we have just run out | |
143 | */ | |
144 | int avail = (char*)argp->end - (char*)argp->p; | |
145 | u32 *p; | |
146 | if (avail + argp->pagelen < nbytes) | |
147 | return NULL; | |
148 | if (avail + PAGE_SIZE < nbytes) /* need more than a page !! */ | |
149 | return NULL; | |
150 | /* ok, we can do it with the current plus the next page */ | |
151 | if (nbytes <= sizeof(argp->tmp)) | |
152 | p = argp->tmp; | |
153 | else { | |
154 | if (argp->tmpp) | |
155 | kfree(argp->tmpp); | |
156 | p = argp->tmpp = kmalloc(nbytes, GFP_KERNEL); | |
157 | if (!p) | |
158 | return NULL; | |
159 | ||
160 | } | |
161 | memcpy(p, argp->p, avail); | |
162 | /* step to next page */ | |
163 | argp->p = page_address(argp->pagelist[0]); | |
164 | argp->pagelist++; | |
165 | if (argp->pagelen < PAGE_SIZE) { | |
166 | argp->end = p + (argp->pagelen>>2); | |
167 | argp->pagelen = 0; | |
168 | } else { | |
169 | argp->end = p + (PAGE_SIZE>>2); | |
170 | argp->pagelen -= PAGE_SIZE; | |
171 | } | |
172 | memcpy(((char*)p)+avail, argp->p, (nbytes - avail)); | |
173 | argp->p += XDR_QUADLEN(nbytes - avail); | |
174 | return p; | |
175 | } | |
176 | ||
177 | static int | |
178 | defer_free(struct nfsd4_compoundargs *argp, | |
179 | void (*release)(const void *), void *p) | |
180 | { | |
181 | struct tmpbuf *tb; | |
182 | ||
183 | tb = kmalloc(sizeof(*tb), GFP_KERNEL); | |
184 | if (!tb) | |
185 | return -ENOMEM; | |
186 | tb->buf = p; | |
187 | tb->release = release; | |
188 | tb->next = argp->to_free; | |
189 | argp->to_free = tb; | |
190 | return 0; | |
191 | } | |
192 | ||
fd39ca9a | 193 | static char *savemem(struct nfsd4_compoundargs *argp, u32 *p, int nbytes) |
1da177e4 LT |
194 | { |
195 | void *new = NULL; | |
196 | if (p == argp->tmp) { | |
197 | new = kmalloc(nbytes, GFP_KERNEL); | |
198 | if (!new) return NULL; | |
199 | p = new; | |
200 | memcpy(p, argp->tmp, nbytes); | |
201 | } else { | |
202 | if (p != argp->tmpp) | |
203 | BUG(); | |
204 | argp->tmpp = NULL; | |
205 | } | |
206 | if (defer_free(argp, kfree, p)) { | |
207 | kfree(new); | |
208 | return NULL; | |
209 | } else | |
210 | return (char *)p; | |
211 | } | |
212 | ||
213 | ||
214 | static int | |
215 | nfsd4_decode_bitmap(struct nfsd4_compoundargs *argp, u32 *bmval) | |
216 | { | |
217 | u32 bmlen; | |
218 | DECODE_HEAD; | |
219 | ||
220 | bmval[0] = 0; | |
221 | bmval[1] = 0; | |
222 | ||
223 | READ_BUF(4); | |
224 | READ32(bmlen); | |
225 | if (bmlen > 1000) | |
226 | goto xdr_error; | |
227 | ||
228 | READ_BUF(bmlen << 2); | |
229 | if (bmlen > 0) | |
230 | READ32(bmval[0]); | |
231 | if (bmlen > 1) | |
232 | READ32(bmval[1]); | |
233 | ||
234 | DECODE_TAIL; | |
235 | } | |
236 | ||
237 | static int | |
238 | nfsd4_decode_fattr(struct nfsd4_compoundargs *argp, u32 *bmval, struct iattr *iattr, | |
239 | struct nfs4_acl **acl) | |
240 | { | |
241 | int expected_len, len = 0; | |
242 | u32 dummy32; | |
243 | char *buf; | |
244 | ||
245 | DECODE_HEAD; | |
246 | iattr->ia_valid = 0; | |
247 | if ((status = nfsd4_decode_bitmap(argp, bmval))) | |
248 | return status; | |
249 | ||
250 | /* | |
251 | * According to spec, unsupported attributes return ERR_NOTSUPP; | |
252 | * read-only attributes return ERR_INVAL. | |
253 | */ | |
254 | if ((bmval[0] & ~NFSD_SUPPORTED_ATTRS_WORD0) || (bmval[1] & ~NFSD_SUPPORTED_ATTRS_WORD1)) | |
255 | return nfserr_attrnotsupp; | |
256 | if ((bmval[0] & ~NFSD_WRITEABLE_ATTRS_WORD0) || (bmval[1] & ~NFSD_WRITEABLE_ATTRS_WORD1)) | |
257 | return nfserr_inval; | |
258 | ||
259 | READ_BUF(4); | |
260 | READ32(expected_len); | |
261 | ||
262 | if (bmval[0] & FATTR4_WORD0_SIZE) { | |
263 | READ_BUF(8); | |
264 | len += 8; | |
265 | READ64(iattr->ia_size); | |
266 | iattr->ia_valid |= ATTR_SIZE; | |
267 | } | |
268 | if (bmval[0] & FATTR4_WORD0_ACL) { | |
269 | int nace, i; | |
270 | struct nfs4_ace ace; | |
271 | ||
272 | READ_BUF(4); len += 4; | |
273 | READ32(nace); | |
274 | ||
275 | *acl = nfs4_acl_new(); | |
276 | if (*acl == NULL) { | |
277 | status = -ENOMEM; | |
278 | goto out_nfserr; | |
279 | } | |
280 | defer_free(argp, (void (*)(const void *))nfs4_acl_free, *acl); | |
281 | ||
282 | for (i = 0; i < nace; i++) { | |
283 | READ_BUF(16); len += 16; | |
284 | READ32(ace.type); | |
285 | READ32(ace.flag); | |
286 | READ32(ace.access_mask); | |
287 | READ32(dummy32); | |
288 | READ_BUF(dummy32); | |
289 | len += XDR_QUADLEN(dummy32) << 2; | |
290 | READMEM(buf, dummy32); | |
291 | ace.whotype = nfs4_acl_get_whotype(buf, dummy32); | |
292 | status = 0; | |
293 | if (ace.whotype != NFS4_ACL_WHO_NAMED) | |
294 | ace.who = 0; | |
295 | else if (ace.flag & NFS4_ACE_IDENTIFIER_GROUP) | |
296 | status = nfsd_map_name_to_gid(argp->rqstp, | |
297 | buf, dummy32, &ace.who); | |
298 | else | |
299 | status = nfsd_map_name_to_uid(argp->rqstp, | |
300 | buf, dummy32, &ace.who); | |
301 | if (status) | |
302 | goto out_nfserr; | |
303 | if (nfs4_acl_add_ace(*acl, ace.type, ace.flag, | |
304 | ace.access_mask, ace.whotype, ace.who) != 0) { | |
305 | status = -ENOMEM; | |
306 | goto out_nfserr; | |
307 | } | |
308 | } | |
309 | } else | |
310 | *acl = NULL; | |
311 | if (bmval[1] & FATTR4_WORD1_MODE) { | |
312 | READ_BUF(4); | |
313 | len += 4; | |
314 | READ32(iattr->ia_mode); | |
315 | iattr->ia_mode &= (S_IFMT | S_IALLUGO); | |
316 | iattr->ia_valid |= ATTR_MODE; | |
317 | } | |
318 | if (bmval[1] & FATTR4_WORD1_OWNER) { | |
319 | READ_BUF(4); | |
320 | len += 4; | |
321 | READ32(dummy32); | |
322 | READ_BUF(dummy32); | |
323 | len += (XDR_QUADLEN(dummy32) << 2); | |
324 | READMEM(buf, dummy32); | |
325 | if ((status = nfsd_map_name_to_uid(argp->rqstp, buf, dummy32, &iattr->ia_uid))) | |
326 | goto out_nfserr; | |
327 | iattr->ia_valid |= ATTR_UID; | |
328 | } | |
329 | if (bmval[1] & FATTR4_WORD1_OWNER_GROUP) { | |
330 | READ_BUF(4); | |
331 | len += 4; | |
332 | READ32(dummy32); | |
333 | READ_BUF(dummy32); | |
334 | len += (XDR_QUADLEN(dummy32) << 2); | |
335 | READMEM(buf, dummy32); | |
336 | if ((status = nfsd_map_name_to_gid(argp->rqstp, buf, dummy32, &iattr->ia_gid))) | |
337 | goto out_nfserr; | |
338 | iattr->ia_valid |= ATTR_GID; | |
339 | } | |
340 | if (bmval[1] & FATTR4_WORD1_TIME_ACCESS_SET) { | |
341 | READ_BUF(4); | |
342 | len += 4; | |
343 | READ32(dummy32); | |
344 | switch (dummy32) { | |
345 | case NFS4_SET_TO_CLIENT_TIME: | |
346 | /* We require the high 32 bits of 'seconds' to be 0, and we ignore | |
347 | all 32 bits of 'nseconds'. */ | |
348 | READ_BUF(12); | |
349 | len += 12; | |
350 | READ32(dummy32); | |
351 | if (dummy32) | |
352 | return nfserr_inval; | |
353 | READ32(iattr->ia_atime.tv_sec); | |
354 | READ32(iattr->ia_atime.tv_nsec); | |
355 | if (iattr->ia_atime.tv_nsec >= (u32)1000000000) | |
356 | return nfserr_inval; | |
357 | iattr->ia_valid |= (ATTR_ATIME | ATTR_ATIME_SET); | |
358 | break; | |
359 | case NFS4_SET_TO_SERVER_TIME: | |
360 | iattr->ia_valid |= ATTR_ATIME; | |
361 | break; | |
362 | default: | |
363 | goto xdr_error; | |
364 | } | |
365 | } | |
366 | if (bmval[1] & FATTR4_WORD1_TIME_METADATA) { | |
367 | /* We require the high 32 bits of 'seconds' to be 0, and we ignore | |
368 | all 32 bits of 'nseconds'. */ | |
369 | READ_BUF(12); | |
370 | len += 12; | |
371 | READ32(dummy32); | |
372 | if (dummy32) | |
373 | return nfserr_inval; | |
374 | READ32(iattr->ia_ctime.tv_sec); | |
375 | READ32(iattr->ia_ctime.tv_nsec); | |
376 | if (iattr->ia_ctime.tv_nsec >= (u32)1000000000) | |
377 | return nfserr_inval; | |
378 | iattr->ia_valid |= ATTR_CTIME; | |
379 | } | |
380 | if (bmval[1] & FATTR4_WORD1_TIME_MODIFY_SET) { | |
381 | READ_BUF(4); | |
382 | len += 4; | |
383 | READ32(dummy32); | |
384 | switch (dummy32) { | |
385 | case NFS4_SET_TO_CLIENT_TIME: | |
386 | /* We require the high 32 bits of 'seconds' to be 0, and we ignore | |
387 | all 32 bits of 'nseconds'. */ | |
388 | READ_BUF(12); | |
389 | len += 12; | |
390 | READ32(dummy32); | |
391 | if (dummy32) | |
392 | return nfserr_inval; | |
393 | READ32(iattr->ia_mtime.tv_sec); | |
394 | READ32(iattr->ia_mtime.tv_nsec); | |
395 | if (iattr->ia_mtime.tv_nsec >= (u32)1000000000) | |
396 | return nfserr_inval; | |
397 | iattr->ia_valid |= (ATTR_MTIME | ATTR_MTIME_SET); | |
398 | break; | |
399 | case NFS4_SET_TO_SERVER_TIME: | |
400 | iattr->ia_valid |= ATTR_MTIME; | |
401 | break; | |
402 | default: | |
403 | goto xdr_error; | |
404 | } | |
405 | } | |
406 | if (len != expected_len) | |
407 | goto xdr_error; | |
408 | ||
409 | DECODE_TAIL; | |
410 | ||
411 | out_nfserr: | |
412 | status = nfserrno(status); | |
413 | goto out; | |
414 | } | |
415 | ||
416 | static int | |
417 | nfsd4_decode_access(struct nfsd4_compoundargs *argp, struct nfsd4_access *access) | |
418 | { | |
419 | DECODE_HEAD; | |
420 | ||
421 | READ_BUF(4); | |
422 | READ32(access->ac_req_access); | |
423 | ||
424 | DECODE_TAIL; | |
425 | } | |
426 | ||
427 | static int | |
428 | nfsd4_decode_close(struct nfsd4_compoundargs *argp, struct nfsd4_close *close) | |
429 | { | |
430 | DECODE_HEAD; | |
431 | ||
432 | close->cl_stateowner = NULL; | |
433 | READ_BUF(4 + sizeof(stateid_t)); | |
434 | READ32(close->cl_seqid); | |
435 | READ32(close->cl_stateid.si_generation); | |
436 | COPYMEM(&close->cl_stateid.si_opaque, sizeof(stateid_opaque_t)); | |
437 | ||
438 | DECODE_TAIL; | |
439 | } | |
440 | ||
441 | ||
442 | static int | |
443 | nfsd4_decode_commit(struct nfsd4_compoundargs *argp, struct nfsd4_commit *commit) | |
444 | { | |
445 | DECODE_HEAD; | |
446 | ||
447 | READ_BUF(12); | |
448 | READ64(commit->co_offset); | |
449 | READ32(commit->co_count); | |
450 | ||
451 | DECODE_TAIL; | |
452 | } | |
453 | ||
454 | static int | |
455 | nfsd4_decode_create(struct nfsd4_compoundargs *argp, struct nfsd4_create *create) | |
456 | { | |
457 | DECODE_HEAD; | |
458 | ||
459 | READ_BUF(4); | |
460 | READ32(create->cr_type); | |
461 | switch (create->cr_type) { | |
462 | case NF4LNK: | |
463 | READ_BUF(4); | |
464 | READ32(create->cr_linklen); | |
465 | READ_BUF(create->cr_linklen); | |
466 | SAVEMEM(create->cr_linkname, create->cr_linklen); | |
467 | break; | |
468 | case NF4BLK: | |
469 | case NF4CHR: | |
470 | READ_BUF(8); | |
471 | READ32(create->cr_specdata1); | |
472 | READ32(create->cr_specdata2); | |
473 | break; | |
474 | case NF4SOCK: | |
475 | case NF4FIFO: | |
476 | case NF4DIR: | |
477 | default: | |
478 | break; | |
479 | } | |
480 | ||
481 | READ_BUF(4); | |
482 | READ32(create->cr_namelen); | |
483 | READ_BUF(create->cr_namelen); | |
484 | SAVEMEM(create->cr_name, create->cr_namelen); | |
485 | if ((status = check_filename(create->cr_name, create->cr_namelen, nfserr_inval))) | |
486 | return status; | |
487 | ||
488 | if ((status = nfsd4_decode_fattr(argp, create->cr_bmval, &create->cr_iattr, &create->cr_acl))) | |
489 | goto out; | |
490 | ||
491 | DECODE_TAIL; | |
492 | } | |
493 | ||
494 | static inline int | |
495 | nfsd4_decode_delegreturn(struct nfsd4_compoundargs *argp, struct nfsd4_delegreturn *dr) | |
496 | { | |
497 | DECODE_HEAD; | |
498 | ||
499 | READ_BUF(sizeof(stateid_t)); | |
500 | READ32(dr->dr_stateid.si_generation); | |
501 | COPYMEM(&dr->dr_stateid.si_opaque, sizeof(stateid_opaque_t)); | |
502 | ||
503 | DECODE_TAIL; | |
504 | } | |
505 | ||
506 | static inline int | |
507 | nfsd4_decode_getattr(struct nfsd4_compoundargs *argp, struct nfsd4_getattr *getattr) | |
508 | { | |
509 | return nfsd4_decode_bitmap(argp, getattr->ga_bmval); | |
510 | } | |
511 | ||
512 | static int | |
513 | nfsd4_decode_link(struct nfsd4_compoundargs *argp, struct nfsd4_link *link) | |
514 | { | |
515 | DECODE_HEAD; | |
516 | ||
517 | READ_BUF(4); | |
518 | READ32(link->li_namelen); | |
519 | READ_BUF(link->li_namelen); | |
520 | SAVEMEM(link->li_name, link->li_namelen); | |
521 | if ((status = check_filename(link->li_name, link->li_namelen, nfserr_inval))) | |
522 | return status; | |
523 | ||
524 | DECODE_TAIL; | |
525 | } | |
526 | ||
527 | static int | |
528 | nfsd4_decode_lock(struct nfsd4_compoundargs *argp, struct nfsd4_lock *lock) | |
529 | { | |
530 | DECODE_HEAD; | |
531 | ||
532 | lock->lk_stateowner = NULL; | |
533 | /* | |
534 | * type, reclaim(boolean), offset, length, new_lock_owner(boolean) | |
535 | */ | |
536 | READ_BUF(28); | |
537 | READ32(lock->lk_type); | |
538 | if ((lock->lk_type < NFS4_READ_LT) || (lock->lk_type > NFS4_WRITEW_LT)) | |
539 | goto xdr_error; | |
540 | READ32(lock->lk_reclaim); | |
541 | READ64(lock->lk_offset); | |
542 | READ64(lock->lk_length); | |
543 | READ32(lock->lk_is_new); | |
544 | ||
545 | if (lock->lk_is_new) { | |
546 | READ_BUF(36); | |
547 | READ32(lock->lk_new_open_seqid); | |
548 | READ32(lock->lk_new_open_stateid.si_generation); | |
549 | ||
550 | COPYMEM(&lock->lk_new_open_stateid.si_opaque, sizeof(stateid_opaque_t)); | |
551 | READ32(lock->lk_new_lock_seqid); | |
552 | COPYMEM(&lock->lk_new_clientid, sizeof(clientid_t)); | |
553 | READ32(lock->lk_new_owner.len); | |
554 | READ_BUF(lock->lk_new_owner.len); | |
555 | READMEM(lock->lk_new_owner.data, lock->lk_new_owner.len); | |
556 | } else { | |
557 | READ_BUF(20); | |
558 | READ32(lock->lk_old_lock_stateid.si_generation); | |
559 | COPYMEM(&lock->lk_old_lock_stateid.si_opaque, sizeof(stateid_opaque_t)); | |
560 | READ32(lock->lk_old_lock_seqid); | |
561 | } | |
562 | ||
563 | DECODE_TAIL; | |
564 | } | |
565 | ||
566 | static int | |
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 | DECODE_TAIL; | |
583 | } | |
584 | ||
585 | static int | |
586 | nfsd4_decode_locku(struct nfsd4_compoundargs *argp, struct nfsd4_locku *locku) | |
587 | { | |
588 | DECODE_HEAD; | |
589 | ||
590 | locku->lu_stateowner = NULL; | |
591 | READ_BUF(24 + sizeof(stateid_t)); | |
592 | READ32(locku->lu_type); | |
593 | if ((locku->lu_type < NFS4_READ_LT) || (locku->lu_type > NFS4_WRITEW_LT)) | |
594 | goto xdr_error; | |
595 | READ32(locku->lu_seqid); | |
596 | READ32(locku->lu_stateid.si_generation); | |
597 | COPYMEM(&locku->lu_stateid.si_opaque, sizeof(stateid_opaque_t)); | |
598 | READ64(locku->lu_offset); | |
599 | READ64(locku->lu_length); | |
600 | ||
601 | DECODE_TAIL; | |
602 | } | |
603 | ||
604 | static int | |
605 | nfsd4_decode_lookup(struct nfsd4_compoundargs *argp, struct nfsd4_lookup *lookup) | |
606 | { | |
607 | DECODE_HEAD; | |
608 | ||
609 | READ_BUF(4); | |
610 | READ32(lookup->lo_len); | |
611 | READ_BUF(lookup->lo_len); | |
612 | SAVEMEM(lookup->lo_name, lookup->lo_len); | |
613 | if ((status = check_filename(lookup->lo_name, lookup->lo_len, nfserr_noent))) | |
614 | return status; | |
615 | ||
616 | DECODE_TAIL; | |
617 | } | |
618 | ||
619 | static int | |
620 | nfsd4_decode_open(struct nfsd4_compoundargs *argp, struct nfsd4_open *open) | |
621 | { | |
622 | DECODE_HEAD; | |
623 | ||
624 | memset(open->op_bmval, 0, sizeof(open->op_bmval)); | |
625 | open->op_iattr.ia_valid = 0; | |
626 | open->op_stateowner = NULL; | |
627 | ||
628 | /* seqid, share_access, share_deny, clientid, ownerlen */ | |
629 | READ_BUF(16 + sizeof(clientid_t)); | |
630 | READ32(open->op_seqid); | |
631 | READ32(open->op_share_access); | |
632 | READ32(open->op_share_deny); | |
633 | COPYMEM(&open->op_clientid, sizeof(clientid_t)); | |
634 | READ32(open->op_owner.len); | |
635 | ||
636 | /* owner, open_flag */ | |
637 | READ_BUF(open->op_owner.len + 4); | |
638 | SAVEMEM(open->op_owner.data, open->op_owner.len); | |
639 | READ32(open->op_create); | |
640 | switch (open->op_create) { | |
641 | case NFS4_OPEN_NOCREATE: | |
642 | break; | |
643 | case NFS4_OPEN_CREATE: | |
644 | READ_BUF(4); | |
645 | READ32(open->op_createmode); | |
646 | switch (open->op_createmode) { | |
647 | case NFS4_CREATE_UNCHECKED: | |
648 | case NFS4_CREATE_GUARDED: | |
649 | if ((status = nfsd4_decode_fattr(argp, open->op_bmval, &open->op_iattr, &open->op_acl))) | |
650 | goto out; | |
651 | break; | |
652 | case NFS4_CREATE_EXCLUSIVE: | |
653 | READ_BUF(8); | |
654 | COPYMEM(open->op_verf.data, 8); | |
655 | break; | |
656 | default: | |
657 | goto xdr_error; | |
658 | } | |
659 | break; | |
660 | default: | |
661 | goto xdr_error; | |
662 | } | |
663 | ||
664 | /* open_claim */ | |
665 | READ_BUF(4); | |
666 | READ32(open->op_claim_type); | |
667 | switch (open->op_claim_type) { | |
668 | case NFS4_OPEN_CLAIM_NULL: | |
669 | case NFS4_OPEN_CLAIM_DELEGATE_PREV: | |
670 | READ_BUF(4); | |
671 | READ32(open->op_fname.len); | |
672 | READ_BUF(open->op_fname.len); | |
673 | SAVEMEM(open->op_fname.data, open->op_fname.len); | |
674 | if ((status = check_filename(open->op_fname.data, open->op_fname.len, nfserr_inval))) | |
675 | return status; | |
676 | break; | |
677 | case NFS4_OPEN_CLAIM_PREVIOUS: | |
678 | READ_BUF(4); | |
679 | READ32(open->op_delegate_type); | |
680 | break; | |
681 | case NFS4_OPEN_CLAIM_DELEGATE_CUR: | |
682 | READ_BUF(sizeof(stateid_t) + 4); | |
683 | COPYMEM(&open->op_delegate_stateid, sizeof(stateid_t)); | |
684 | READ32(open->op_fname.len); | |
685 | READ_BUF(open->op_fname.len); | |
686 | SAVEMEM(open->op_fname.data, open->op_fname.len); | |
687 | if ((status = check_filename(open->op_fname.data, open->op_fname.len, nfserr_inval))) | |
688 | return status; | |
689 | break; | |
690 | default: | |
691 | goto xdr_error; | |
692 | } | |
693 | ||
694 | DECODE_TAIL; | |
695 | } | |
696 | ||
697 | static int | |
698 | nfsd4_decode_open_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_open_confirm *open_conf) | |
699 | { | |
700 | DECODE_HEAD; | |
701 | ||
702 | open_conf->oc_stateowner = NULL; | |
703 | READ_BUF(4 + sizeof(stateid_t)); | |
704 | READ32(open_conf->oc_req_stateid.si_generation); | |
705 | COPYMEM(&open_conf->oc_req_stateid.si_opaque, sizeof(stateid_opaque_t)); | |
706 | READ32(open_conf->oc_seqid); | |
707 | ||
708 | DECODE_TAIL; | |
709 | } | |
710 | ||
711 | static int | |
712 | nfsd4_decode_open_downgrade(struct nfsd4_compoundargs *argp, struct nfsd4_open_downgrade *open_down) | |
713 | { | |
714 | DECODE_HEAD; | |
715 | ||
716 | open_down->od_stateowner = NULL; | |
717 | READ_BUF(12 + sizeof(stateid_t)); | |
718 | READ32(open_down->od_stateid.si_generation); | |
719 | COPYMEM(&open_down->od_stateid.si_opaque, sizeof(stateid_opaque_t)); | |
720 | READ32(open_down->od_seqid); | |
721 | READ32(open_down->od_share_access); | |
722 | READ32(open_down->od_share_deny); | |
723 | ||
724 | DECODE_TAIL; | |
725 | } | |
726 | ||
727 | static int | |
728 | nfsd4_decode_putfh(struct nfsd4_compoundargs *argp, struct nfsd4_putfh *putfh) | |
729 | { | |
730 | DECODE_HEAD; | |
731 | ||
732 | READ_BUF(4); | |
733 | READ32(putfh->pf_fhlen); | |
734 | if (putfh->pf_fhlen > NFS4_FHSIZE) | |
735 | goto xdr_error; | |
736 | READ_BUF(putfh->pf_fhlen); | |
737 | SAVEMEM(putfh->pf_fhval, putfh->pf_fhlen); | |
738 | ||
739 | DECODE_TAIL; | |
740 | } | |
741 | ||
742 | static int | |
743 | nfsd4_decode_read(struct nfsd4_compoundargs *argp, struct nfsd4_read *read) | |
744 | { | |
745 | DECODE_HEAD; | |
746 | ||
747 | READ_BUF(sizeof(stateid_t) + 12); | |
748 | READ32(read->rd_stateid.si_generation); | |
749 | COPYMEM(&read->rd_stateid.si_opaque, sizeof(stateid_opaque_t)); | |
750 | READ64(read->rd_offset); | |
751 | READ32(read->rd_length); | |
752 | ||
753 | DECODE_TAIL; | |
754 | } | |
755 | ||
756 | static int | |
757 | nfsd4_decode_readdir(struct nfsd4_compoundargs *argp, struct nfsd4_readdir *readdir) | |
758 | { | |
759 | DECODE_HEAD; | |
760 | ||
761 | READ_BUF(24); | |
762 | READ64(readdir->rd_cookie); | |
763 | COPYMEM(readdir->rd_verf.data, sizeof(readdir->rd_verf.data)); | |
764 | READ32(readdir->rd_dircount); /* just in case you needed a useless field... */ | |
765 | READ32(readdir->rd_maxcount); | |
766 | if ((status = nfsd4_decode_bitmap(argp, readdir->rd_bmval))) | |
767 | goto out; | |
768 | ||
769 | DECODE_TAIL; | |
770 | } | |
771 | ||
772 | static int | |
773 | nfsd4_decode_remove(struct nfsd4_compoundargs *argp, struct nfsd4_remove *remove) | |
774 | { | |
775 | DECODE_HEAD; | |
776 | ||
777 | READ_BUF(4); | |
778 | READ32(remove->rm_namelen); | |
779 | READ_BUF(remove->rm_namelen); | |
780 | SAVEMEM(remove->rm_name, remove->rm_namelen); | |
781 | if ((status = check_filename(remove->rm_name, remove->rm_namelen, nfserr_noent))) | |
782 | return status; | |
783 | ||
784 | DECODE_TAIL; | |
785 | } | |
786 | ||
787 | static int | |
788 | nfsd4_decode_rename(struct nfsd4_compoundargs *argp, struct nfsd4_rename *rename) | |
789 | { | |
790 | DECODE_HEAD; | |
791 | ||
792 | READ_BUF(4); | |
793 | READ32(rename->rn_snamelen); | |
794 | READ_BUF(rename->rn_snamelen + 4); | |
795 | SAVEMEM(rename->rn_sname, rename->rn_snamelen); | |
796 | READ32(rename->rn_tnamelen); | |
797 | READ_BUF(rename->rn_tnamelen); | |
798 | SAVEMEM(rename->rn_tname, rename->rn_tnamelen); | |
799 | if ((status = check_filename(rename->rn_sname, rename->rn_snamelen, nfserr_noent))) | |
800 | return status; | |
801 | if ((status = check_filename(rename->rn_tname, rename->rn_tnamelen, nfserr_inval))) | |
802 | return status; | |
803 | ||
804 | DECODE_TAIL; | |
805 | } | |
806 | ||
807 | static int | |
808 | nfsd4_decode_renew(struct nfsd4_compoundargs *argp, clientid_t *clientid) | |
809 | { | |
810 | DECODE_HEAD; | |
811 | ||
812 | READ_BUF(sizeof(clientid_t)); | |
813 | COPYMEM(clientid, sizeof(clientid_t)); | |
814 | ||
815 | DECODE_TAIL; | |
816 | } | |
817 | ||
818 | static int | |
819 | nfsd4_decode_setattr(struct nfsd4_compoundargs *argp, struct nfsd4_setattr *setattr) | |
820 | { | |
821 | DECODE_HEAD; | |
822 | ||
823 | READ_BUF(sizeof(stateid_t)); | |
824 | READ32(setattr->sa_stateid.si_generation); | |
825 | COPYMEM(&setattr->sa_stateid.si_opaque, sizeof(stateid_opaque_t)); | |
826 | if ((status = nfsd4_decode_fattr(argp, setattr->sa_bmval, &setattr->sa_iattr, &setattr->sa_acl))) | |
827 | goto out; | |
828 | ||
829 | DECODE_TAIL; | |
830 | } | |
831 | ||
832 | static int | |
833 | nfsd4_decode_setclientid(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid *setclientid) | |
834 | { | |
835 | DECODE_HEAD; | |
836 | ||
837 | READ_BUF(12); | |
838 | COPYMEM(setclientid->se_verf.data, 8); | |
839 | READ32(setclientid->se_namelen); | |
840 | ||
841 | READ_BUF(setclientid->se_namelen + 8); | |
842 | SAVEMEM(setclientid->se_name, setclientid->se_namelen); | |
843 | READ32(setclientid->se_callback_prog); | |
844 | READ32(setclientid->se_callback_netid_len); | |
845 | ||
846 | READ_BUF(setclientid->se_callback_netid_len + 4); | |
847 | SAVEMEM(setclientid->se_callback_netid_val, setclientid->se_callback_netid_len); | |
848 | READ32(setclientid->se_callback_addr_len); | |
849 | ||
850 | READ_BUF(setclientid->se_callback_addr_len + 4); | |
851 | SAVEMEM(setclientid->se_callback_addr_val, setclientid->se_callback_addr_len); | |
852 | READ32(setclientid->se_callback_ident); | |
853 | ||
854 | DECODE_TAIL; | |
855 | } | |
856 | ||
857 | static int | |
858 | nfsd4_decode_setclientid_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid_confirm *scd_c) | |
859 | { | |
860 | DECODE_HEAD; | |
861 | ||
862 | READ_BUF(8 + sizeof(nfs4_verifier)); | |
863 | COPYMEM(&scd_c->sc_clientid, 8); | |
864 | COPYMEM(&scd_c->sc_confirm, sizeof(nfs4_verifier)); | |
865 | ||
866 | DECODE_TAIL; | |
867 | } | |
868 | ||
869 | /* Also used for NVERIFY */ | |
870 | static int | |
871 | nfsd4_decode_verify(struct nfsd4_compoundargs *argp, struct nfsd4_verify *verify) | |
872 | { | |
873 | #if 0 | |
874 | struct nfsd4_compoundargs save = { | |
875 | .p = argp->p, | |
876 | .end = argp->end, | |
877 | .rqstp = argp->rqstp, | |
878 | }; | |
879 | u32 ve_bmval[2]; | |
880 | struct iattr ve_iattr; /* request */ | |
881 | struct nfs4_acl *ve_acl; /* request */ | |
882 | #endif | |
883 | DECODE_HEAD; | |
884 | ||
885 | if ((status = nfsd4_decode_bitmap(argp, verify->ve_bmval))) | |
886 | goto out; | |
887 | ||
888 | /* For convenience's sake, we compare raw xdr'd attributes in | |
889 | * nfsd4_proc_verify; however we still decode here just to return | |
890 | * correct error in case of bad xdr. */ | |
891 | #if 0 | |
892 | status = nfsd4_decode_fattr(ve_bmval, &ve_iattr, &ve_acl); | |
893 | if (status == nfserr_inval) { | |
894 | status = nfserrno(status); | |
895 | goto out; | |
896 | } | |
897 | #endif | |
898 | READ_BUF(4); | |
899 | READ32(verify->ve_attrlen); | |
900 | READ_BUF(verify->ve_attrlen); | |
901 | SAVEMEM(verify->ve_attrval, verify->ve_attrlen); | |
902 | ||
903 | DECODE_TAIL; | |
904 | } | |
905 | ||
906 | static int | |
907 | nfsd4_decode_write(struct nfsd4_compoundargs *argp, struct nfsd4_write *write) | |
908 | { | |
909 | int avail; | |
910 | int v; | |
911 | int len; | |
912 | DECODE_HEAD; | |
913 | ||
914 | READ_BUF(sizeof(stateid_opaque_t) + 20); | |
915 | READ32(write->wr_stateid.si_generation); | |
916 | COPYMEM(&write->wr_stateid.si_opaque, sizeof(stateid_opaque_t)); | |
917 | READ64(write->wr_offset); | |
918 | READ32(write->wr_stable_how); | |
919 | if (write->wr_stable_how > 2) | |
920 | goto xdr_error; | |
921 | READ32(write->wr_buflen); | |
922 | ||
923 | /* Sorry .. no magic macros for this.. * | |
924 | * READ_BUF(write->wr_buflen); | |
925 | * SAVEMEM(write->wr_buf, write->wr_buflen); | |
926 | */ | |
927 | avail = (char*)argp->end - (char*)argp->p; | |
928 | if (avail + argp->pagelen < write->wr_buflen) { | |
929 | printk(KERN_NOTICE "xdr error! (%s:%d)\n", __FILE__, __LINE__); | |
930 | goto xdr_error; | |
931 | } | |
932 | write->wr_vec[0].iov_base = p; | |
933 | write->wr_vec[0].iov_len = avail; | |
934 | v = 0; | |
935 | len = write->wr_buflen; | |
936 | while (len > write->wr_vec[v].iov_len) { | |
937 | len -= write->wr_vec[v].iov_len; | |
938 | v++; | |
939 | write->wr_vec[v].iov_base = page_address(argp->pagelist[0]); | |
940 | argp->pagelist++; | |
941 | if (argp->pagelen >= PAGE_SIZE) { | |
942 | write->wr_vec[v].iov_len = PAGE_SIZE; | |
943 | argp->pagelen -= PAGE_SIZE; | |
944 | } else { | |
945 | write->wr_vec[v].iov_len = argp->pagelen; | |
946 | argp->pagelen -= len; | |
947 | } | |
948 | } | |
949 | argp->end = (u32*) (write->wr_vec[v].iov_base + write->wr_vec[v].iov_len); | |
950 | argp->p = (u32*) (write->wr_vec[v].iov_base + (XDR_QUADLEN(len) << 2)); | |
951 | write->wr_vec[v].iov_len = len; | |
952 | write->wr_vlen = v+1; | |
953 | ||
954 | DECODE_TAIL; | |
955 | } | |
956 | ||
957 | static int | |
958 | nfsd4_decode_release_lockowner(struct nfsd4_compoundargs *argp, struct nfsd4_release_lockowner *rlockowner) | |
959 | { | |
960 | DECODE_HEAD; | |
961 | ||
962 | READ_BUF(12); | |
963 | COPYMEM(&rlockowner->rl_clientid, sizeof(clientid_t)); | |
964 | READ32(rlockowner->rl_owner.len); | |
965 | READ_BUF(rlockowner->rl_owner.len); | |
966 | READMEM(rlockowner->rl_owner.data, rlockowner->rl_owner.len); | |
967 | ||
968 | DECODE_TAIL; | |
969 | } | |
970 | ||
971 | static int | |
972 | nfsd4_decode_compound(struct nfsd4_compoundargs *argp) | |
973 | { | |
974 | DECODE_HEAD; | |
975 | struct nfsd4_op *op; | |
976 | int i; | |
977 | ||
978 | /* | |
979 | * XXX: According to spec, we should check the tag | |
980 | * for UTF-8 compliance. I'm postponing this for | |
981 | * now because it seems that some clients do use | |
982 | * binary tags. | |
983 | */ | |
984 | READ_BUF(4); | |
985 | READ32(argp->taglen); | |
986 | READ_BUF(argp->taglen + 8); | |
987 | SAVEMEM(argp->tag, argp->taglen); | |
988 | READ32(argp->minorversion); | |
989 | READ32(argp->opcnt); | |
990 | ||
991 | if (argp->taglen > NFSD4_MAX_TAGLEN) | |
992 | goto xdr_error; | |
993 | if (argp->opcnt > 100) | |
994 | goto xdr_error; | |
995 | ||
996 | if (argp->opcnt > sizeof(argp->iops)/sizeof(argp->iops[0])) { | |
997 | argp->ops = kmalloc(argp->opcnt * sizeof(*argp->ops), GFP_KERNEL); | |
998 | if (!argp->ops) { | |
999 | argp->ops = argp->iops; | |
1000 | printk(KERN_INFO "nfsd: couldn't allocate room for COMPOUND\n"); | |
1001 | goto xdr_error; | |
1002 | } | |
1003 | } | |
1004 | ||
1005 | for (i = 0; i < argp->opcnt; i++) { | |
1006 | op = &argp->ops[i]; | |
1007 | op->replay = NULL; | |
1008 | ||
1009 | /* | |
1010 | * We can't use READ_BUF() here because we need to handle | |
1011 | * a missing opcode as an OP_WRITE + 1. So we need to check | |
1012 | * to see if we're truly at the end of our buffer or if there | |
1013 | * is another page we need to flip to. | |
1014 | */ | |
1015 | ||
1016 | if (argp->p == argp->end) { | |
1017 | if (argp->pagelen < 4) { | |
1018 | /* There isn't an opcode still on the wire */ | |
1019 | op->opnum = OP_WRITE + 1; | |
1020 | op->status = nfserr_bad_xdr; | |
1021 | argp->opcnt = i+1; | |
1022 | break; | |
1023 | } | |
1024 | ||
1025 | /* | |
1026 | * False alarm. We just hit a page boundary, but there | |
1027 | * is still data available. Move pointer across page | |
1028 | * boundary. *snip from READ_BUF* | |
1029 | */ | |
1030 | argp->p = page_address(argp->pagelist[0]); | |
1031 | argp->pagelist++; | |
1032 | if (argp->pagelen < PAGE_SIZE) { | |
1033 | argp->end = p + (argp->pagelen>>2); | |
1034 | argp->pagelen = 0; | |
1035 | } else { | |
1036 | argp->end = p + (PAGE_SIZE>>2); | |
1037 | argp->pagelen -= PAGE_SIZE; | |
1038 | } | |
1039 | } | |
1040 | op->opnum = ntohl(*argp->p++); | |
1041 | ||
1042 | switch (op->opnum) { | |
1043 | case 2: /* Reserved operation */ | |
1044 | op->opnum = OP_ILLEGAL; | |
1045 | if (argp->minorversion == 0) | |
1046 | op->status = nfserr_op_illegal; | |
1047 | else | |
1048 | op->status = nfserr_minor_vers_mismatch; | |
1049 | break; | |
1050 | case OP_ACCESS: | |
1051 | op->status = nfsd4_decode_access(argp, &op->u.access); | |
1052 | break; | |
1053 | case OP_CLOSE: | |
1054 | op->status = nfsd4_decode_close(argp, &op->u.close); | |
1055 | break; | |
1056 | case OP_COMMIT: | |
1057 | op->status = nfsd4_decode_commit(argp, &op->u.commit); | |
1058 | break; | |
1059 | case OP_CREATE: | |
1060 | op->status = nfsd4_decode_create(argp, &op->u.create); | |
1061 | break; | |
1062 | case OP_DELEGRETURN: | |
1063 | op->status = nfsd4_decode_delegreturn(argp, &op->u.delegreturn); | |
1064 | break; | |
1065 | case OP_GETATTR: | |
1066 | op->status = nfsd4_decode_getattr(argp, &op->u.getattr); | |
1067 | break; | |
1068 | case OP_GETFH: | |
1069 | op->status = nfs_ok; | |
1070 | break; | |
1071 | case OP_LINK: | |
1072 | op->status = nfsd4_decode_link(argp, &op->u.link); | |
1073 | break; | |
1074 | case OP_LOCK: | |
1075 | op->status = nfsd4_decode_lock(argp, &op->u.lock); | |
1076 | break; | |
1077 | case OP_LOCKT: | |
1078 | op->status = nfsd4_decode_lockt(argp, &op->u.lockt); | |
1079 | break; | |
1080 | case OP_LOCKU: | |
1081 | op->status = nfsd4_decode_locku(argp, &op->u.locku); | |
1082 | break; | |
1083 | case OP_LOOKUP: | |
1084 | op->status = nfsd4_decode_lookup(argp, &op->u.lookup); | |
1085 | break; | |
1086 | case OP_LOOKUPP: | |
1087 | op->status = nfs_ok; | |
1088 | break; | |
1089 | case OP_NVERIFY: | |
1090 | op->status = nfsd4_decode_verify(argp, &op->u.nverify); | |
1091 | break; | |
1092 | case OP_OPEN: | |
1093 | op->status = nfsd4_decode_open(argp, &op->u.open); | |
1094 | break; | |
1095 | case OP_OPEN_CONFIRM: | |
1096 | op->status = nfsd4_decode_open_confirm(argp, &op->u.open_confirm); | |
1097 | break; | |
1098 | case OP_OPEN_DOWNGRADE: | |
1099 | op->status = nfsd4_decode_open_downgrade(argp, &op->u.open_downgrade); | |
1100 | break; | |
1101 | case OP_PUTFH: | |
1102 | op->status = nfsd4_decode_putfh(argp, &op->u.putfh); | |
1103 | break; | |
1104 | case OP_PUTROOTFH: | |
1105 | op->status = nfs_ok; | |
1106 | break; | |
1107 | case OP_READ: | |
1108 | op->status = nfsd4_decode_read(argp, &op->u.read); | |
1109 | break; | |
1110 | case OP_READDIR: | |
1111 | op->status = nfsd4_decode_readdir(argp, &op->u.readdir); | |
1112 | break; | |
1113 | case OP_READLINK: | |
1114 | op->status = nfs_ok; | |
1115 | break; | |
1116 | case OP_REMOVE: | |
1117 | op->status = nfsd4_decode_remove(argp, &op->u.remove); | |
1118 | break; | |
1119 | case OP_RENAME: | |
1120 | op->status = nfsd4_decode_rename(argp, &op->u.rename); | |
1121 | break; | |
1122 | case OP_RESTOREFH: | |
1123 | op->status = nfs_ok; | |
1124 | break; | |
1125 | case OP_RENEW: | |
1126 | op->status = nfsd4_decode_renew(argp, &op->u.renew); | |
1127 | break; | |
1128 | case OP_SAVEFH: | |
1129 | op->status = nfs_ok; | |
1130 | break; | |
1131 | case OP_SETATTR: | |
1132 | op->status = nfsd4_decode_setattr(argp, &op->u.setattr); | |
1133 | break; | |
1134 | case OP_SETCLIENTID: | |
1135 | op->status = nfsd4_decode_setclientid(argp, &op->u.setclientid); | |
1136 | break; | |
1137 | case OP_SETCLIENTID_CONFIRM: | |
1138 | op->status = nfsd4_decode_setclientid_confirm(argp, &op->u.setclientid_confirm); | |
1139 | break; | |
1140 | case OP_VERIFY: | |
1141 | op->status = nfsd4_decode_verify(argp, &op->u.verify); | |
1142 | break; | |
1143 | case OP_WRITE: | |
1144 | op->status = nfsd4_decode_write(argp, &op->u.write); | |
1145 | break; | |
1146 | case OP_RELEASE_LOCKOWNER: | |
1147 | op->status = nfsd4_decode_release_lockowner(argp, &op->u.release_lockowner); | |
1148 | break; | |
1149 | default: | |
1150 | op->opnum = OP_ILLEGAL; | |
1151 | op->status = nfserr_op_illegal; | |
1152 | break; | |
1153 | } | |
1154 | ||
1155 | if (op->status) { | |
1156 | argp->opcnt = i+1; | |
1157 | break; | |
1158 | } | |
1159 | } | |
1160 | ||
1161 | DECODE_TAIL; | |
1162 | } | |
1163 | /* | |
1164 | * END OF "GENERIC" DECODE ROUTINES. | |
1165 | */ | |
1166 | ||
1167 | /* | |
1168 | * START OF "GENERIC" ENCODE ROUTINES. | |
1169 | * These may look a little ugly since they are imported from a "generic" | |
1170 | * set of XDR encode/decode routines which are intended to be shared by | |
1171 | * all of our NFSv4 implementations (OpenBSD, MacOS X...). | |
1172 | * | |
1173 | * If the pain of reading these is too great, it should be a straightforward | |
1174 | * task to translate them into Linux-specific versions which are more | |
1175 | * consistent with the style used in NFSv2/v3... | |
1176 | */ | |
1177 | #define ENCODE_HEAD u32 *p | |
1178 | ||
1179 | #define WRITE32(n) *p++ = htonl(n) | |
1180 | #define WRITE64(n) do { \ | |
1181 | *p++ = htonl((u32)((n) >> 32)); \ | |
1182 | *p++ = htonl((u32)(n)); \ | |
1183 | } while (0) | |
1184 | #define WRITEMEM(ptr,nbytes) do { \ | |
1185 | *(p + XDR_QUADLEN(nbytes) -1) = 0; \ | |
1186 | memcpy(p, ptr, nbytes); \ | |
1187 | p += XDR_QUADLEN(nbytes); \ | |
1188 | } while (0) | |
1189 | #define WRITECINFO(c) do { \ | |
1190 | *p++ = htonl(c.atomic); \ | |
1191 | *p++ = htonl(c.before_ctime_sec); \ | |
1192 | *p++ = htonl(c.before_ctime_nsec); \ | |
1193 | *p++ = htonl(c.after_ctime_sec); \ | |
1194 | *p++ = htonl(c.after_ctime_nsec); \ | |
1195 | } while (0) | |
1196 | ||
1197 | #define RESERVE_SPACE(nbytes) do { \ | |
1198 | p = resp->p; \ | |
1199 | BUG_ON(p + XDR_QUADLEN(nbytes) > resp->end); \ | |
1200 | } while (0) | |
1201 | #define ADJUST_ARGS() resp->p = p | |
1202 | ||
1203 | /* | |
1204 | * Header routine to setup seqid operation replay cache | |
1205 | */ | |
1206 | #define ENCODE_SEQID_OP_HEAD \ | |
1207 | u32 *p; \ | |
1208 | u32 *save; \ | |
1209 | \ | |
1210 | save = resp->p; | |
1211 | ||
1212 | /* | |
7fb64cee N |
1213 | * Routine for encoding the result of a "seqid-mutating" NFSv4 operation. This |
1214 | * is where sequence id's are incremented, and the replay cache is filled. | |
1215 | * Note that we increment sequence id's here, at the last moment, so we're sure | |
1216 | * we know whether the error to be returned is a sequence id mutating error. | |
1da177e4 LT |
1217 | */ |
1218 | ||
1219 | #define ENCODE_SEQID_OP_TAIL(stateowner) do { \ | |
1220 | if (seqid_mutating_err(nfserr) && stateowner) { \ | |
bd9aac52 | 1221 | stateowner->so_seqid++; \ |
1da177e4 LT |
1222 | stateowner->so_replay.rp_status = nfserr; \ |
1223 | stateowner->so_replay.rp_buflen = \ | |
1224 | (((char *)(resp)->p - (char *)save)); \ | |
1225 | memcpy(stateowner->so_replay.rp_buf, save, \ | |
1226 | stateowner->so_replay.rp_buflen); \ | |
1227 | } } while (0); | |
1228 | ||
1229 | ||
1230 | static u32 nfs4_ftypes[16] = { | |
1231 | NF4BAD, NF4FIFO, NF4CHR, NF4BAD, | |
1232 | NF4DIR, NF4BAD, NF4BLK, NF4BAD, | |
1233 | NF4REG, NF4BAD, NF4LNK, NF4BAD, | |
1234 | NF4SOCK, NF4BAD, NF4LNK, NF4BAD, | |
1235 | }; | |
1236 | ||
1237 | static int | |
1238 | nfsd4_encode_name(struct svc_rqst *rqstp, int whotype, uid_t id, int group, | |
1239 | u32 **p, int *buflen) | |
1240 | { | |
1241 | int status; | |
1242 | ||
1243 | if (*buflen < (XDR_QUADLEN(IDMAP_NAMESZ) << 2) + 4) | |
1244 | return nfserr_resource; | |
1245 | if (whotype != NFS4_ACL_WHO_NAMED) | |
1246 | status = nfs4_acl_write_who(whotype, (u8 *)(*p + 1)); | |
1247 | else if (group) | |
1248 | status = nfsd_map_gid_to_name(rqstp, id, (u8 *)(*p + 1)); | |
1249 | else | |
1250 | status = nfsd_map_uid_to_name(rqstp, id, (u8 *)(*p + 1)); | |
1251 | if (status < 0) | |
1252 | return nfserrno(status); | |
1253 | *p = xdr_encode_opaque(*p, NULL, status); | |
1254 | *buflen -= (XDR_QUADLEN(status) << 2) + 4; | |
1255 | BUG_ON(*buflen < 0); | |
1256 | return 0; | |
1257 | } | |
1258 | ||
1259 | static inline int | |
1260 | nfsd4_encode_user(struct svc_rqst *rqstp, uid_t uid, u32 **p, int *buflen) | |
1261 | { | |
1262 | return nfsd4_encode_name(rqstp, NFS4_ACL_WHO_NAMED, uid, 0, p, buflen); | |
1263 | } | |
1264 | ||
1265 | static inline int | |
1266 | nfsd4_encode_group(struct svc_rqst *rqstp, uid_t gid, u32 **p, int *buflen) | |
1267 | { | |
1268 | return nfsd4_encode_name(rqstp, NFS4_ACL_WHO_NAMED, gid, 1, p, buflen); | |
1269 | } | |
1270 | ||
1271 | static inline int | |
1272 | nfsd4_encode_aclname(struct svc_rqst *rqstp, int whotype, uid_t id, int group, | |
1273 | u32 **p, int *buflen) | |
1274 | { | |
1275 | return nfsd4_encode_name(rqstp, whotype, id, group, p, buflen); | |
1276 | } | |
1277 | ||
1278 | ||
1279 | /* | |
1280 | * Note: @fhp can be NULL; in this case, we might have to compose the filehandle | |
1281 | * ourselves. | |
1282 | * | |
1283 | * @countp is the buffer size in _words_; upon successful return this becomes | |
1284 | * replaced with the number of words written. | |
1285 | */ | |
1286 | int | |
1287 | nfsd4_encode_fattr(struct svc_fh *fhp, struct svc_export *exp, | |
1288 | struct dentry *dentry, u32 *buffer, int *countp, u32 *bmval, | |
1289 | struct svc_rqst *rqstp) | |
1290 | { | |
1291 | u32 bmval0 = bmval[0]; | |
1292 | u32 bmval1 = bmval[1]; | |
1293 | struct kstat stat; | |
1294 | struct svc_fh tempfh; | |
1295 | struct kstatfs statfs; | |
1296 | int buflen = *countp << 2; | |
1297 | u32 *attrlenp; | |
1298 | u32 dummy; | |
1299 | u64 dummy64; | |
1300 | u32 *p = buffer; | |
1301 | int status; | |
1302 | int aclsupport = 0; | |
1303 | struct nfs4_acl *acl = NULL; | |
1304 | ||
1305 | BUG_ON(bmval1 & NFSD_WRITEONLY_ATTRS_WORD1); | |
1306 | BUG_ON(bmval0 & ~NFSD_SUPPORTED_ATTRS_WORD0); | |
1307 | BUG_ON(bmval1 & ~NFSD_SUPPORTED_ATTRS_WORD1); | |
1308 | ||
1309 | status = vfs_getattr(exp->ex_mnt, dentry, &stat); | |
1310 | if (status) | |
1311 | goto out_nfserr; | |
1312 | if ((bmval0 & (FATTR4_WORD0_FILES_FREE | FATTR4_WORD0_FILES_TOTAL)) || | |
1313 | (bmval1 & (FATTR4_WORD1_SPACE_AVAIL | FATTR4_WORD1_SPACE_FREE | | |
1314 | FATTR4_WORD1_SPACE_TOTAL))) { | |
1315 | status = vfs_statfs(dentry->d_inode->i_sb, &statfs); | |
1316 | if (status) | |
1317 | goto out_nfserr; | |
1318 | } | |
1319 | if ((bmval0 & (FATTR4_WORD0_FILEHANDLE | FATTR4_WORD0_FSID)) && !fhp) { | |
1320 | fh_init(&tempfh, NFS4_FHSIZE); | |
1321 | status = fh_compose(&tempfh, exp, dentry, NULL); | |
1322 | if (status) | |
1323 | goto out; | |
1324 | fhp = &tempfh; | |
1325 | } | |
1326 | if (bmval0 & (FATTR4_WORD0_ACL | FATTR4_WORD0_ACLSUPPORT | |
1327 | | FATTR4_WORD0_SUPPORTED_ATTRS)) { | |
1328 | status = nfsd4_get_nfs4_acl(rqstp, dentry, &acl); | |
1329 | aclsupport = (status == 0); | |
1330 | if (bmval0 & FATTR4_WORD0_ACL) { | |
1331 | if (status == -EOPNOTSUPP) | |
1332 | bmval0 &= ~FATTR4_WORD0_ACL; | |
1333 | else if (status == -EINVAL) { | |
1334 | status = nfserr_attrnotsupp; | |
1335 | goto out; | |
1336 | } else if (status != 0) | |
1337 | goto out_nfserr; | |
1338 | } | |
1339 | } | |
1340 | if ((buflen -= 16) < 0) | |
1341 | goto out_resource; | |
1342 | ||
1343 | WRITE32(2); | |
1344 | WRITE32(bmval0); | |
1345 | WRITE32(bmval1); | |
1346 | attrlenp = p++; /* to be backfilled later */ | |
1347 | ||
1348 | if (bmval0 & FATTR4_WORD0_SUPPORTED_ATTRS) { | |
1349 | if ((buflen -= 12) < 0) | |
1350 | goto out_resource; | |
1351 | WRITE32(2); | |
1352 | WRITE32(aclsupport ? | |
1353 | NFSD_SUPPORTED_ATTRS_WORD0 : | |
1354 | NFSD_SUPPORTED_ATTRS_WORD0 & ~FATTR4_WORD0_ACL); | |
1355 | WRITE32(NFSD_SUPPORTED_ATTRS_WORD1); | |
1356 | } | |
1357 | if (bmval0 & FATTR4_WORD0_TYPE) { | |
1358 | if ((buflen -= 4) < 0) | |
1359 | goto out_resource; | |
1360 | dummy = nfs4_ftypes[(stat.mode & S_IFMT) >> 12]; | |
1361 | if (dummy == NF4BAD) | |
1362 | goto out_serverfault; | |
1363 | WRITE32(dummy); | |
1364 | } | |
1365 | if (bmval0 & FATTR4_WORD0_FH_EXPIRE_TYPE) { | |
1366 | if ((buflen -= 4) < 0) | |
1367 | goto out_resource; | |
49640001 | 1368 | if (exp->ex_flags & NFSEXP_NOSUBTREECHECK) |
e34ac862 | 1369 | WRITE32(NFS4_FH_PERSISTENT); |
49640001 | 1370 | else |
e34ac862 | 1371 | WRITE32(NFS4_FH_PERSISTENT|NFS4_FH_VOL_RENAME); |
1da177e4 LT |
1372 | } |
1373 | if (bmval0 & FATTR4_WORD0_CHANGE) { | |
1374 | /* | |
1375 | * Note: This _must_ be consistent with the scheme for writing | |
1376 | * change_info, so any changes made here must be reflected there | |
1377 | * as well. (See xdr4.h:set_change_info() and the WRITECINFO() | |
1378 | * macro above.) | |
1379 | */ | |
1380 | if ((buflen -= 8) < 0) | |
1381 | goto out_resource; | |
1382 | WRITE32(stat.ctime.tv_sec); | |
1383 | WRITE32(stat.ctime.tv_nsec); | |
1384 | } | |
1385 | if (bmval0 & FATTR4_WORD0_SIZE) { | |
1386 | if ((buflen -= 8) < 0) | |
1387 | goto out_resource; | |
1388 | WRITE64(stat.size); | |
1389 | } | |
1390 | if (bmval0 & FATTR4_WORD0_LINK_SUPPORT) { | |
1391 | if ((buflen -= 4) < 0) | |
1392 | goto out_resource; | |
1393 | WRITE32(1); | |
1394 | } | |
1395 | if (bmval0 & FATTR4_WORD0_SYMLINK_SUPPORT) { | |
1396 | if ((buflen -= 4) < 0) | |
1397 | goto out_resource; | |
1398 | WRITE32(1); | |
1399 | } | |
1400 | if (bmval0 & FATTR4_WORD0_NAMED_ATTR) { | |
1401 | if ((buflen -= 4) < 0) | |
1402 | goto out_resource; | |
1403 | WRITE32(0); | |
1404 | } | |
1405 | if (bmval0 & FATTR4_WORD0_FSID) { | |
1406 | if ((buflen -= 16) < 0) | |
1407 | goto out_resource; | |
1408 | if (is_fsid(fhp, rqstp->rq_reffh)) { | |
1409 | WRITE64((u64)exp->ex_fsid); | |
1410 | WRITE64((u64)0); | |
1411 | } else { | |
1412 | WRITE32(0); | |
1413 | WRITE32(MAJOR(stat.dev)); | |
1414 | WRITE32(0); | |
1415 | WRITE32(MINOR(stat.dev)); | |
1416 | } | |
1417 | } | |
1418 | if (bmval0 & FATTR4_WORD0_UNIQUE_HANDLES) { | |
1419 | if ((buflen -= 4) < 0) | |
1420 | goto out_resource; | |
1421 | WRITE32(0); | |
1422 | } | |
1423 | if (bmval0 & FATTR4_WORD0_LEASE_TIME) { | |
1424 | if ((buflen -= 4) < 0) | |
1425 | goto out_resource; | |
1426 | WRITE32(NFSD_LEASE_TIME); | |
1427 | } | |
1428 | if (bmval0 & FATTR4_WORD0_RDATTR_ERROR) { | |
1429 | if ((buflen -= 4) < 0) | |
1430 | goto out_resource; | |
1431 | WRITE32(0); | |
1432 | } | |
1433 | if (bmval0 & FATTR4_WORD0_ACL) { | |
1434 | struct nfs4_ace *ace; | |
1435 | struct list_head *h; | |
1436 | ||
1437 | if (acl == NULL) { | |
1438 | if ((buflen -= 4) < 0) | |
1439 | goto out_resource; | |
1440 | ||
1441 | WRITE32(0); | |
1442 | goto out_acl; | |
1443 | } | |
1444 | if ((buflen -= 4) < 0) | |
1445 | goto out_resource; | |
1446 | WRITE32(acl->naces); | |
1447 | ||
1448 | list_for_each(h, &acl->ace_head) { | |
1449 | ace = list_entry(h, struct nfs4_ace, l_ace); | |
1450 | ||
1451 | if ((buflen -= 4*3) < 0) | |
1452 | goto out_resource; | |
1453 | WRITE32(ace->type); | |
1454 | WRITE32(ace->flag); | |
1455 | WRITE32(ace->access_mask & NFS4_ACE_MASK_ALL); | |
1456 | status = nfsd4_encode_aclname(rqstp, ace->whotype, | |
1457 | ace->who, ace->flag & NFS4_ACE_IDENTIFIER_GROUP, | |
1458 | &p, &buflen); | |
1459 | if (status == nfserr_resource) | |
1460 | goto out_resource; | |
1461 | if (status) | |
1462 | goto out; | |
1463 | } | |
1464 | } | |
1465 | out_acl: | |
1466 | if (bmval0 & FATTR4_WORD0_ACLSUPPORT) { | |
1467 | if ((buflen -= 4) < 0) | |
1468 | goto out_resource; | |
1469 | WRITE32(aclsupport ? | |
1470 | ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL : 0); | |
1471 | } | |
1472 | if (bmval0 & FATTR4_WORD0_CANSETTIME) { | |
1473 | if ((buflen -= 4) < 0) | |
1474 | goto out_resource; | |
1475 | WRITE32(1); | |
1476 | } | |
1477 | if (bmval0 & FATTR4_WORD0_CASE_INSENSITIVE) { | |
1478 | if ((buflen -= 4) < 0) | |
1479 | goto out_resource; | |
1480 | WRITE32(1); | |
1481 | } | |
1482 | if (bmval0 & FATTR4_WORD0_CASE_PRESERVING) { | |
1483 | if ((buflen -= 4) < 0) | |
1484 | goto out_resource; | |
1485 | WRITE32(1); | |
1486 | } | |
1487 | if (bmval0 & FATTR4_WORD0_CHOWN_RESTRICTED) { | |
1488 | if ((buflen -= 4) < 0) | |
1489 | goto out_resource; | |
1490 | WRITE32(1); | |
1491 | } | |
1492 | if (bmval0 & FATTR4_WORD0_FILEHANDLE) { | |
1493 | buflen -= (XDR_QUADLEN(fhp->fh_handle.fh_size) << 2) + 4; | |
1494 | if (buflen < 0) | |
1495 | goto out_resource; | |
1496 | WRITE32(fhp->fh_handle.fh_size); | |
1497 | WRITEMEM(&fhp->fh_handle.fh_base, fhp->fh_handle.fh_size); | |
1498 | } | |
1499 | if (bmval0 & FATTR4_WORD0_FILEID) { | |
1500 | if ((buflen -= 8) < 0) | |
1501 | goto out_resource; | |
1502 | WRITE64((u64) stat.ino); | |
1503 | } | |
1504 | if (bmval0 & FATTR4_WORD0_FILES_AVAIL) { | |
1505 | if ((buflen -= 8) < 0) | |
1506 | goto out_resource; | |
1507 | WRITE64((u64) statfs.f_ffree); | |
1508 | } | |
1509 | if (bmval0 & FATTR4_WORD0_FILES_FREE) { | |
1510 | if ((buflen -= 8) < 0) | |
1511 | goto out_resource; | |
1512 | WRITE64((u64) statfs.f_ffree); | |
1513 | } | |
1514 | if (bmval0 & FATTR4_WORD0_FILES_TOTAL) { | |
1515 | if ((buflen -= 8) < 0) | |
1516 | goto out_resource; | |
1517 | WRITE64((u64) statfs.f_files); | |
1518 | } | |
1519 | if (bmval0 & FATTR4_WORD0_HOMOGENEOUS) { | |
1520 | if ((buflen -= 4) < 0) | |
1521 | goto out_resource; | |
1522 | WRITE32(1); | |
1523 | } | |
1524 | if (bmval0 & FATTR4_WORD0_MAXFILESIZE) { | |
1525 | if ((buflen -= 8) < 0) | |
1526 | goto out_resource; | |
1527 | WRITE64(~(u64)0); | |
1528 | } | |
1529 | if (bmval0 & FATTR4_WORD0_MAXLINK) { | |
1530 | if ((buflen -= 4) < 0) | |
1531 | goto out_resource; | |
1532 | WRITE32(255); | |
1533 | } | |
1534 | if (bmval0 & FATTR4_WORD0_MAXNAME) { | |
1535 | if ((buflen -= 4) < 0) | |
1536 | goto out_resource; | |
1537 | WRITE32(~(u32) 0); | |
1538 | } | |
1539 | if (bmval0 & FATTR4_WORD0_MAXREAD) { | |
1540 | if ((buflen -= 8) < 0) | |
1541 | goto out_resource; | |
1542 | WRITE64((u64) NFSSVC_MAXBLKSIZE); | |
1543 | } | |
1544 | if (bmval0 & FATTR4_WORD0_MAXWRITE) { | |
1545 | if ((buflen -= 8) < 0) | |
1546 | goto out_resource; | |
1547 | WRITE64((u64) NFSSVC_MAXBLKSIZE); | |
1548 | } | |
1549 | if (bmval1 & FATTR4_WORD1_MODE) { | |
1550 | if ((buflen -= 4) < 0) | |
1551 | goto out_resource; | |
1552 | WRITE32(stat.mode & S_IALLUGO); | |
1553 | } | |
1554 | if (bmval1 & FATTR4_WORD1_NO_TRUNC) { | |
1555 | if ((buflen -= 4) < 0) | |
1556 | goto out_resource; | |
1557 | WRITE32(1); | |
1558 | } | |
1559 | if (bmval1 & FATTR4_WORD1_NUMLINKS) { | |
1560 | if ((buflen -= 4) < 0) | |
1561 | goto out_resource; | |
1562 | WRITE32(stat.nlink); | |
1563 | } | |
1564 | if (bmval1 & FATTR4_WORD1_OWNER) { | |
1565 | status = nfsd4_encode_user(rqstp, stat.uid, &p, &buflen); | |
1566 | if (status == nfserr_resource) | |
1567 | goto out_resource; | |
1568 | if (status) | |
1569 | goto out; | |
1570 | } | |
1571 | if (bmval1 & FATTR4_WORD1_OWNER_GROUP) { | |
1572 | status = nfsd4_encode_group(rqstp, stat.gid, &p, &buflen); | |
1573 | if (status == nfserr_resource) | |
1574 | goto out_resource; | |
1575 | if (status) | |
1576 | goto out; | |
1577 | } | |
1578 | if (bmval1 & FATTR4_WORD1_RAWDEV) { | |
1579 | if ((buflen -= 8) < 0) | |
1580 | goto out_resource; | |
1581 | WRITE32((u32) MAJOR(stat.rdev)); | |
1582 | WRITE32((u32) MINOR(stat.rdev)); | |
1583 | } | |
1584 | if (bmval1 & FATTR4_WORD1_SPACE_AVAIL) { | |
1585 | if ((buflen -= 8) < 0) | |
1586 | goto out_resource; | |
1587 | dummy64 = (u64)statfs.f_bavail * (u64)statfs.f_bsize; | |
1588 | WRITE64(dummy64); | |
1589 | } | |
1590 | if (bmval1 & FATTR4_WORD1_SPACE_FREE) { | |
1591 | if ((buflen -= 8) < 0) | |
1592 | goto out_resource; | |
1593 | dummy64 = (u64)statfs.f_bfree * (u64)statfs.f_bsize; | |
1594 | WRITE64(dummy64); | |
1595 | } | |
1596 | if (bmval1 & FATTR4_WORD1_SPACE_TOTAL) { | |
1597 | if ((buflen -= 8) < 0) | |
1598 | goto out_resource; | |
1599 | dummy64 = (u64)statfs.f_blocks * (u64)statfs.f_bsize; | |
1600 | WRITE64(dummy64); | |
1601 | } | |
1602 | if (bmval1 & FATTR4_WORD1_SPACE_USED) { | |
1603 | if ((buflen -= 8) < 0) | |
1604 | goto out_resource; | |
1605 | dummy64 = (u64)stat.blocks << 9; | |
1606 | WRITE64(dummy64); | |
1607 | } | |
1608 | if (bmval1 & FATTR4_WORD1_TIME_ACCESS) { | |
1609 | if ((buflen -= 12) < 0) | |
1610 | goto out_resource; | |
1611 | WRITE32(0); | |
1612 | WRITE32(stat.atime.tv_sec); | |
1613 | WRITE32(stat.atime.tv_nsec); | |
1614 | } | |
1615 | if (bmval1 & FATTR4_WORD1_TIME_DELTA) { | |
1616 | if ((buflen -= 12) < 0) | |
1617 | goto out_resource; | |
1618 | WRITE32(0); | |
1619 | WRITE32(1); | |
1620 | WRITE32(0); | |
1621 | } | |
1622 | if (bmval1 & FATTR4_WORD1_TIME_METADATA) { | |
1623 | if ((buflen -= 12) < 0) | |
1624 | goto out_resource; | |
1625 | WRITE32(0); | |
1626 | WRITE32(stat.ctime.tv_sec); | |
1627 | WRITE32(stat.ctime.tv_nsec); | |
1628 | } | |
1629 | if (bmval1 & FATTR4_WORD1_TIME_MODIFY) { | |
1630 | if ((buflen -= 12) < 0) | |
1631 | goto out_resource; | |
1632 | WRITE32(0); | |
1633 | WRITE32(stat.mtime.tv_sec); | |
1634 | WRITE32(stat.mtime.tv_nsec); | |
1635 | } | |
1636 | if (bmval1 & FATTR4_WORD1_MOUNTED_ON_FILEID) { | |
1637 | struct dentry *mnt_pnt, *mnt_root; | |
1638 | ||
1639 | if ((buflen -= 8) < 0) | |
1640 | goto out_resource; | |
1641 | mnt_root = exp->ex_mnt->mnt_root; | |
1642 | if (mnt_root->d_inode == dentry->d_inode) { | |
1643 | mnt_pnt = exp->ex_mnt->mnt_mountpoint; | |
1644 | WRITE64((u64) mnt_pnt->d_inode->i_ino); | |
1645 | } else | |
1646 | WRITE64((u64) stat.ino); | |
1647 | } | |
1648 | *attrlenp = htonl((char *)p - (char *)attrlenp - 4); | |
1649 | *countp = p - buffer; | |
1650 | status = nfs_ok; | |
1651 | ||
1652 | out: | |
1653 | nfs4_acl_free(acl); | |
1654 | if (fhp == &tempfh) | |
1655 | fh_put(&tempfh); | |
1656 | return status; | |
1657 | out_nfserr: | |
1658 | status = nfserrno(status); | |
1659 | goto out; | |
1660 | out_resource: | |
1661 | *countp = 0; | |
1662 | status = nfserr_resource; | |
1663 | goto out; | |
1664 | out_serverfault: | |
1665 | status = nfserr_serverfault; | |
1666 | goto out; | |
1667 | } | |
1668 | ||
1669 | static int | |
1670 | nfsd4_encode_dirent_fattr(struct nfsd4_readdir *cd, | |
1671 | const char *name, int namlen, u32 *p, int *buflen) | |
1672 | { | |
1673 | struct svc_export *exp = cd->rd_fhp->fh_export; | |
1674 | struct dentry *dentry; | |
1675 | int nfserr; | |
1676 | ||
1677 | dentry = lookup_one_len(name, cd->rd_fhp->fh_dentry, namlen); | |
1678 | if (IS_ERR(dentry)) | |
1679 | return nfserrno(PTR_ERR(dentry)); | |
1680 | ||
1681 | exp_get(exp); | |
1682 | if (d_mountpoint(dentry)) { | |
1683 | if (nfsd_cross_mnt(cd->rd_rqstp, &dentry, &exp)) { | |
1684 | /* | |
1685 | * -EAGAIN is the only error returned from | |
1686 | * nfsd_cross_mnt() and it indicates that an | |
1687 | * up-call has been initiated to fill in the export | |
1688 | * options on exp. When the answer comes back, | |
1689 | * this call will be retried. | |
1690 | */ | |
1691 | nfserr = nfserr_dropit; | |
1692 | goto out_put; | |
1693 | } | |
1694 | ||
1695 | } | |
1696 | nfserr = nfsd4_encode_fattr(NULL, exp, dentry, p, buflen, cd->rd_bmval, | |
1697 | cd->rd_rqstp); | |
1698 | out_put: | |
1699 | dput(dentry); | |
1700 | exp_put(exp); | |
1701 | return nfserr; | |
1702 | } | |
1703 | ||
1704 | static u32 * | |
1705 | nfsd4_encode_rdattr_error(u32 *p, int buflen, int nfserr) | |
1706 | { | |
1707 | u32 *attrlenp; | |
1708 | ||
1709 | if (buflen < 6) | |
1710 | return NULL; | |
1711 | *p++ = htonl(2); | |
1712 | *p++ = htonl(FATTR4_WORD0_RDATTR_ERROR); /* bmval0 */ | |
1713 | *p++ = htonl(0); /* bmval1 */ | |
1714 | ||
1715 | attrlenp = p++; | |
1716 | *p++ = nfserr; /* no htonl */ | |
1717 | *attrlenp = htonl((char *)p - (char *)attrlenp - 4); | |
1718 | return p; | |
1719 | } | |
1720 | ||
1721 | static int | |
1722 | nfsd4_encode_dirent(struct readdir_cd *ccd, const char *name, int namlen, | |
1723 | loff_t offset, ino_t ino, unsigned int d_type) | |
1724 | { | |
1725 | struct nfsd4_readdir *cd = container_of(ccd, struct nfsd4_readdir, common); | |
1726 | int buflen; | |
1727 | u32 *p = cd->buffer; | |
1728 | int nfserr = nfserr_toosmall; | |
1729 | ||
1730 | /* In nfsv4, "." and ".." never make it onto the wire.. */ | |
1731 | if (name && isdotent(name, namlen)) { | |
1732 | cd->common.err = nfs_ok; | |
1733 | return 0; | |
1734 | } | |
1735 | ||
1736 | if (cd->offset) | |
1737 | xdr_encode_hyper(cd->offset, (u64) offset); | |
1738 | ||
1739 | buflen = cd->buflen - 4 - XDR_QUADLEN(namlen); | |
1740 | if (buflen < 0) | |
1741 | goto fail; | |
1742 | ||
1743 | *p++ = xdr_one; /* mark entry present */ | |
1744 | cd->offset = p; /* remember pointer */ | |
1745 | p = xdr_encode_hyper(p, NFS_OFFSET_MAX); /* offset of next entry */ | |
1746 | p = xdr_encode_array(p, name, namlen); /* name length & name */ | |
1747 | ||
1748 | nfserr = nfsd4_encode_dirent_fattr(cd, name, namlen, p, &buflen); | |
1749 | switch (nfserr) { | |
1750 | case nfs_ok: | |
1751 | p += buflen; | |
1752 | break; | |
1753 | case nfserr_resource: | |
1754 | nfserr = nfserr_toosmall; | |
1755 | goto fail; | |
1756 | case nfserr_dropit: | |
1757 | goto fail; | |
1758 | default: | |
1759 | /* | |
1760 | * If the client requested the RDATTR_ERROR attribute, | |
1761 | * we stuff the error code into this attribute | |
1762 | * and continue. If this attribute was not requested, | |
1763 | * then in accordance with the spec, we fail the | |
1764 | * entire READDIR operation(!) | |
1765 | */ | |
1766 | if (!(cd->rd_bmval[0] & FATTR4_WORD0_RDATTR_ERROR)) | |
1767 | goto fail; | |
1768 | nfserr = nfserr_toosmall; | |
1769 | p = nfsd4_encode_rdattr_error(p, buflen, nfserr); | |
1770 | if (p == NULL) | |
1771 | goto fail; | |
1772 | } | |
1773 | cd->buflen -= (p - cd->buffer); | |
1774 | cd->buffer = p; | |
1775 | cd->common.err = nfs_ok; | |
1776 | return 0; | |
1777 | fail: | |
1778 | cd->common.err = nfserr; | |
1779 | return -EINVAL; | |
1780 | } | |
1781 | ||
1782 | static void | |
1783 | nfsd4_encode_access(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_access *access) | |
1784 | { | |
1785 | ENCODE_HEAD; | |
1786 | ||
1787 | if (!nfserr) { | |
1788 | RESERVE_SPACE(8); | |
1789 | WRITE32(access->ac_supported); | |
1790 | WRITE32(access->ac_resp_access); | |
1791 | ADJUST_ARGS(); | |
1792 | } | |
1793 | } | |
1794 | ||
1795 | static void | |
1796 | nfsd4_encode_close(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_close *close) | |
1797 | { | |
1798 | ENCODE_SEQID_OP_HEAD; | |
1799 | ||
1800 | if (!nfserr) { | |
1801 | RESERVE_SPACE(sizeof(stateid_t)); | |
1802 | WRITE32(close->cl_stateid.si_generation); | |
1803 | WRITEMEM(&close->cl_stateid.si_opaque, sizeof(stateid_opaque_t)); | |
1804 | ADJUST_ARGS(); | |
1805 | } | |
1806 | ENCODE_SEQID_OP_TAIL(close->cl_stateowner); | |
1807 | } | |
1808 | ||
1809 | ||
1810 | static void | |
1811 | nfsd4_encode_commit(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_commit *commit) | |
1812 | { | |
1813 | ENCODE_HEAD; | |
1814 | ||
1815 | if (!nfserr) { | |
1816 | RESERVE_SPACE(8); | |
1817 | WRITEMEM(commit->co_verf.data, 8); | |
1818 | ADJUST_ARGS(); | |
1819 | } | |
1820 | } | |
1821 | ||
1822 | static void | |
1823 | nfsd4_encode_create(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_create *create) | |
1824 | { | |
1825 | ENCODE_HEAD; | |
1826 | ||
1827 | if (!nfserr) { | |
1828 | RESERVE_SPACE(32); | |
1829 | WRITECINFO(create->cr_cinfo); | |
1830 | WRITE32(2); | |
1831 | WRITE32(create->cr_bmval[0]); | |
1832 | WRITE32(create->cr_bmval[1]); | |
1833 | ADJUST_ARGS(); | |
1834 | } | |
1835 | } | |
1836 | ||
1837 | static int | |
1838 | nfsd4_encode_getattr(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_getattr *getattr) | |
1839 | { | |
1840 | struct svc_fh *fhp = getattr->ga_fhp; | |
1841 | int buflen; | |
1842 | ||
1843 | if (nfserr) | |
1844 | return nfserr; | |
1845 | ||
1846 | buflen = resp->end - resp->p - (COMPOUND_ERR_SLACK_SPACE >> 2); | |
1847 | nfserr = nfsd4_encode_fattr(fhp, fhp->fh_export, fhp->fh_dentry, | |
1848 | resp->p, &buflen, getattr->ga_bmval, | |
1849 | resp->rqstp); | |
1850 | ||
1851 | if (!nfserr) | |
1852 | resp->p += buflen; | |
1853 | return nfserr; | |
1854 | } | |
1855 | ||
1856 | static void | |
1857 | nfsd4_encode_getfh(struct nfsd4_compoundres *resp, int nfserr, struct svc_fh *fhp) | |
1858 | { | |
1859 | unsigned int len; | |
1860 | ENCODE_HEAD; | |
1861 | ||
1862 | if (!nfserr) { | |
1863 | len = fhp->fh_handle.fh_size; | |
1864 | RESERVE_SPACE(len + 4); | |
1865 | WRITE32(len); | |
1866 | WRITEMEM(&fhp->fh_handle.fh_base, len); | |
1867 | ADJUST_ARGS(); | |
1868 | } | |
1869 | } | |
1870 | ||
1871 | /* | |
1872 | * Including all fields other than the name, a LOCK4denied structure requires | |
1873 | * 8(clientid) + 4(namelen) + 8(offset) + 8(length) + 4(type) = 32 bytes. | |
1874 | */ | |
1875 | static void | |
1876 | nfsd4_encode_lock_denied(struct nfsd4_compoundres *resp, struct nfsd4_lock_denied *ld) | |
1877 | { | |
1878 | ENCODE_HEAD; | |
1879 | ||
1880 | RESERVE_SPACE(32 + XDR_LEN(ld->ld_sop ? ld->ld_sop->so_owner.len : 0)); | |
1881 | WRITE64(ld->ld_start); | |
1882 | WRITE64(ld->ld_length); | |
1883 | WRITE32(ld->ld_type); | |
1884 | if (ld->ld_sop) { | |
1885 | WRITEMEM(&ld->ld_clientid, 8); | |
1886 | WRITE32(ld->ld_sop->so_owner.len); | |
1887 | WRITEMEM(ld->ld_sop->so_owner.data, ld->ld_sop->so_owner.len); | |
1888 | kref_put(&ld->ld_sop->so_ref, nfs4_free_stateowner); | |
1889 | } else { /* non - nfsv4 lock in conflict, no clientid nor owner */ | |
1890 | WRITE64((u64)0); /* clientid */ | |
1891 | WRITE32(0); /* length of owner name */ | |
1892 | } | |
1893 | ADJUST_ARGS(); | |
1894 | } | |
1895 | ||
1896 | static void | |
1897 | nfsd4_encode_lock(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_lock *lock) | |
1898 | { | |
1899 | ||
1900 | ENCODE_SEQID_OP_HEAD; | |
1901 | ||
1902 | if (!nfserr) { | |
1903 | RESERVE_SPACE(4 + sizeof(stateid_t)); | |
1904 | WRITE32(lock->lk_resp_stateid.si_generation); | |
1905 | WRITEMEM(&lock->lk_resp_stateid.si_opaque, sizeof(stateid_opaque_t)); | |
1906 | ADJUST_ARGS(); | |
1907 | } else if (nfserr == nfserr_denied) | |
1908 | nfsd4_encode_lock_denied(resp, &lock->lk_denied); | |
1909 | ||
1910 | ENCODE_SEQID_OP_TAIL(lock->lk_stateowner); | |
1911 | } | |
1912 | ||
1913 | static void | |
1914 | nfsd4_encode_lockt(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_lockt *lockt) | |
1915 | { | |
1916 | if (nfserr == nfserr_denied) | |
1917 | nfsd4_encode_lock_denied(resp, &lockt->lt_denied); | |
1918 | } | |
1919 | ||
1920 | static void | |
1921 | nfsd4_encode_locku(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_locku *locku) | |
1922 | { | |
1923 | ENCODE_SEQID_OP_HEAD; | |
1924 | ||
1925 | if (!nfserr) { | |
1926 | RESERVE_SPACE(sizeof(stateid_t)); | |
1927 | WRITE32(locku->lu_stateid.si_generation); | |
1928 | WRITEMEM(&locku->lu_stateid.si_opaque, sizeof(stateid_opaque_t)); | |
1929 | ADJUST_ARGS(); | |
1930 | } | |
1931 | ||
1932 | ENCODE_SEQID_OP_TAIL(locku->lu_stateowner); | |
1933 | } | |
1934 | ||
1935 | ||
1936 | static void | |
1937 | nfsd4_encode_link(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_link *link) | |
1938 | { | |
1939 | ENCODE_HEAD; | |
1940 | ||
1941 | if (!nfserr) { | |
1942 | RESERVE_SPACE(20); | |
1943 | WRITECINFO(link->li_cinfo); | |
1944 | ADJUST_ARGS(); | |
1945 | } | |
1946 | } | |
1947 | ||
1948 | ||
1949 | static void | |
1950 | nfsd4_encode_open(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_open *open) | |
1951 | { | |
1952 | ENCODE_SEQID_OP_HEAD; | |
1953 | ||
1954 | if (nfserr) | |
1955 | goto out; | |
1956 | ||
1957 | RESERVE_SPACE(36 + sizeof(stateid_t)); | |
1958 | WRITE32(open->op_stateid.si_generation); | |
1959 | WRITEMEM(&open->op_stateid.si_opaque, sizeof(stateid_opaque_t)); | |
1960 | WRITECINFO(open->op_cinfo); | |
1961 | WRITE32(open->op_rflags); | |
1962 | WRITE32(2); | |
1963 | WRITE32(open->op_bmval[0]); | |
1964 | WRITE32(open->op_bmval[1]); | |
1965 | WRITE32(open->op_delegate_type); | |
1966 | ADJUST_ARGS(); | |
1967 | ||
1968 | switch (open->op_delegate_type) { | |
1969 | case NFS4_OPEN_DELEGATE_NONE: | |
1970 | break; | |
1971 | case NFS4_OPEN_DELEGATE_READ: | |
1972 | RESERVE_SPACE(20 + sizeof(stateid_t)); | |
1973 | WRITEMEM(&open->op_delegate_stateid, sizeof(stateid_t)); | |
7b190fec | 1974 | WRITE32(open->op_recall); |
1da177e4 LT |
1975 | |
1976 | /* | |
1977 | * TODO: ACE's in delegations | |
1978 | */ | |
1979 | WRITE32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE); | |
1980 | WRITE32(0); | |
1981 | WRITE32(0); | |
1982 | WRITE32(0); /* XXX: is NULL principal ok? */ | |
1983 | ADJUST_ARGS(); | |
1984 | break; | |
1985 | case NFS4_OPEN_DELEGATE_WRITE: | |
1986 | RESERVE_SPACE(32 + sizeof(stateid_t)); | |
1987 | WRITEMEM(&open->op_delegate_stateid, sizeof(stateid_t)); | |
1988 | WRITE32(0); | |
1989 | ||
1990 | /* | |
1991 | * TODO: space_limit's in delegations | |
1992 | */ | |
1993 | WRITE32(NFS4_LIMIT_SIZE); | |
1994 | WRITE32(~(u32)0); | |
1995 | WRITE32(~(u32)0); | |
1996 | ||
1997 | /* | |
1998 | * TODO: ACE's in delegations | |
1999 | */ | |
2000 | WRITE32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE); | |
2001 | WRITE32(0); | |
2002 | WRITE32(0); | |
2003 | WRITE32(0); /* XXX: is NULL principal ok? */ | |
2004 | ADJUST_ARGS(); | |
2005 | break; | |
2006 | default: | |
2007 | BUG(); | |
2008 | } | |
2009 | /* XXX save filehandle here */ | |
2010 | out: | |
2011 | ENCODE_SEQID_OP_TAIL(open->op_stateowner); | |
2012 | } | |
2013 | ||
2014 | static void | |
2015 | nfsd4_encode_open_confirm(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_open_confirm *oc) | |
2016 | { | |
2017 | ENCODE_SEQID_OP_HEAD; | |
2018 | ||
2019 | if (!nfserr) { | |
2020 | RESERVE_SPACE(sizeof(stateid_t)); | |
2021 | WRITE32(oc->oc_resp_stateid.si_generation); | |
2022 | WRITEMEM(&oc->oc_resp_stateid.si_opaque, sizeof(stateid_opaque_t)); | |
2023 | ADJUST_ARGS(); | |
2024 | } | |
2025 | ||
2026 | ENCODE_SEQID_OP_TAIL(oc->oc_stateowner); | |
2027 | } | |
2028 | ||
2029 | static void | |
2030 | nfsd4_encode_open_downgrade(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_open_downgrade *od) | |
2031 | { | |
2032 | ENCODE_SEQID_OP_HEAD; | |
2033 | ||
2034 | if (!nfserr) { | |
2035 | RESERVE_SPACE(sizeof(stateid_t)); | |
2036 | WRITE32(od->od_stateid.si_generation); | |
2037 | WRITEMEM(&od->od_stateid.si_opaque, sizeof(stateid_opaque_t)); | |
2038 | ADJUST_ARGS(); | |
2039 | } | |
2040 | ||
2041 | ENCODE_SEQID_OP_TAIL(od->od_stateowner); | |
2042 | } | |
2043 | ||
2044 | static int | |
2045 | nfsd4_encode_read(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_read *read) | |
2046 | { | |
2047 | u32 eof; | |
2048 | int v, pn; | |
2049 | unsigned long maxcount; | |
2050 | long len; | |
2051 | ENCODE_HEAD; | |
2052 | ||
2053 | if (nfserr) | |
2054 | return nfserr; | |
2055 | if (resp->xbuf->page_len) | |
2056 | return nfserr_resource; | |
2057 | ||
2058 | RESERVE_SPACE(8); /* eof flag and byte count */ | |
2059 | ||
2060 | maxcount = NFSSVC_MAXBLKSIZE; | |
2061 | if (maxcount > read->rd_length) | |
2062 | maxcount = read->rd_length; | |
2063 | ||
2064 | len = maxcount; | |
2065 | v = 0; | |
2066 | while (len > 0) { | |
2067 | pn = resp->rqstp->rq_resused; | |
2068 | svc_take_page(resp->rqstp); | |
2069 | read->rd_iov[v].iov_base = page_address(resp->rqstp->rq_respages[pn]); | |
2070 | read->rd_iov[v].iov_len = len < PAGE_SIZE ? len : PAGE_SIZE; | |
2071 | v++; | |
2072 | len -= PAGE_SIZE; | |
2073 | } | |
2074 | read->rd_vlen = v; | |
2075 | ||
2076 | nfserr = nfsd_read(read->rd_rqstp, read->rd_fhp, read->rd_filp, | |
2077 | read->rd_offset, read->rd_iov, read->rd_vlen, | |
2078 | &maxcount); | |
2079 | ||
2080 | if (nfserr == nfserr_symlink) | |
2081 | nfserr = nfserr_inval; | |
2082 | if (nfserr) | |
2083 | return nfserr; | |
2084 | eof = (read->rd_offset + maxcount >= read->rd_fhp->fh_dentry->d_inode->i_size); | |
2085 | ||
2086 | WRITE32(eof); | |
2087 | WRITE32(maxcount); | |
2088 | ADJUST_ARGS(); | |
2089 | resp->xbuf->head[0].iov_len = ((char*)resp->p) - (char*)resp->xbuf->head[0].iov_base; | |
2090 | ||
2091 | resp->xbuf->page_len = maxcount; | |
2092 | ||
2093 | /* read zero bytes -> don't set up tail */ | |
2094 | if(!maxcount) | |
2095 | return 0; | |
2096 | ||
2097 | /* set up page for remaining responses */ | |
2098 | svc_take_page(resp->rqstp); | |
2099 | resp->xbuf->tail[0].iov_base = | |
2100 | page_address(resp->rqstp->rq_respages[resp->rqstp->rq_resused-1]); | |
2101 | resp->rqstp->rq_restailpage = resp->rqstp->rq_resused-1; | |
2102 | resp->xbuf->tail[0].iov_len = 0; | |
2103 | resp->p = resp->xbuf->tail[0].iov_base; | |
2104 | resp->end = resp->p + PAGE_SIZE/4; | |
2105 | ||
2106 | if (maxcount&3) { | |
2107 | *(resp->p)++ = 0; | |
2108 | resp->xbuf->tail[0].iov_base += maxcount&3; | |
2109 | resp->xbuf->tail[0].iov_len = 4 - (maxcount&3); | |
2110 | } | |
2111 | return 0; | |
2112 | } | |
2113 | ||
2114 | static int | |
2115 | nfsd4_encode_readlink(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_readlink *readlink) | |
2116 | { | |
2117 | int maxcount; | |
2118 | char *page; | |
2119 | ENCODE_HEAD; | |
2120 | ||
2121 | if (nfserr) | |
2122 | return nfserr; | |
2123 | if (resp->xbuf->page_len) | |
2124 | return nfserr_resource; | |
2125 | ||
2126 | svc_take_page(resp->rqstp); | |
2127 | page = page_address(resp->rqstp->rq_respages[resp->rqstp->rq_resused-1]); | |
2128 | ||
2129 | maxcount = PAGE_SIZE; | |
2130 | RESERVE_SPACE(4); | |
2131 | ||
2132 | /* | |
2133 | * XXX: By default, the ->readlink() VFS op will truncate symlinks | |
2134 | * if they would overflow the buffer. Is this kosher in NFSv4? If | |
2135 | * not, one easy fix is: if ->readlink() precisely fills the buffer, | |
2136 | * assume that truncation occurred, and return NFS4ERR_RESOURCE. | |
2137 | */ | |
2138 | nfserr = nfsd_readlink(readlink->rl_rqstp, readlink->rl_fhp, page, &maxcount); | |
2139 | if (nfserr == nfserr_isdir) | |
2140 | return nfserr_inval; | |
2141 | if (nfserr) | |
2142 | return nfserr; | |
2143 | ||
2144 | WRITE32(maxcount); | |
2145 | ADJUST_ARGS(); | |
2146 | resp->xbuf->head[0].iov_len = ((char*)resp->p) - (char*)resp->xbuf->head[0].iov_base; | |
2147 | ||
2148 | svc_take_page(resp->rqstp); | |
2149 | resp->xbuf->tail[0].iov_base = | |
2150 | page_address(resp->rqstp->rq_respages[resp->rqstp->rq_resused-1]); | |
2151 | resp->rqstp->rq_restailpage = resp->rqstp->rq_resused-1; | |
2152 | resp->xbuf->tail[0].iov_len = 0; | |
2153 | resp->p = resp->xbuf->tail[0].iov_base; | |
2154 | resp->end = resp->p + PAGE_SIZE/4; | |
2155 | ||
2156 | resp->xbuf->page_len = maxcount; | |
2157 | if (maxcount&3) { | |
2158 | *(resp->p)++ = 0; | |
2159 | resp->xbuf->tail[0].iov_base += maxcount&3; | |
2160 | resp->xbuf->tail[0].iov_len = 4 - (maxcount&3); | |
2161 | } | |
2162 | return 0; | |
2163 | } | |
2164 | ||
2165 | static int | |
2166 | nfsd4_encode_readdir(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_readdir *readdir) | |
2167 | { | |
2168 | int maxcount; | |
2169 | loff_t offset; | |
2170 | u32 *page, *savep; | |
2171 | ENCODE_HEAD; | |
2172 | ||
2173 | if (nfserr) | |
2174 | return nfserr; | |
2175 | if (resp->xbuf->page_len) | |
2176 | return nfserr_resource; | |
2177 | ||
2178 | RESERVE_SPACE(8); /* verifier */ | |
2179 | savep = p; | |
2180 | ||
2181 | /* XXX: Following NFSv3, we ignore the READDIR verifier for now. */ | |
2182 | WRITE32(0); | |
2183 | WRITE32(0); | |
2184 | ADJUST_ARGS(); | |
2185 | resp->xbuf->head[0].iov_len = ((char*)resp->p) - (char*)resp->xbuf->head[0].iov_base; | |
2186 | ||
2187 | maxcount = PAGE_SIZE; | |
2188 | if (maxcount > readdir->rd_maxcount) | |
2189 | maxcount = readdir->rd_maxcount; | |
2190 | ||
2191 | /* | |
2192 | * Convert from bytes to words, account for the two words already | |
2193 | * written, make sure to leave two words at the end for the next | |
2194 | * pointer and eof field. | |
2195 | */ | |
2196 | maxcount = (maxcount >> 2) - 4; | |
2197 | if (maxcount < 0) { | |
2198 | nfserr = nfserr_toosmall; | |
2199 | goto err_no_verf; | |
2200 | } | |
2201 | ||
2202 | svc_take_page(resp->rqstp); | |
2203 | page = page_address(resp->rqstp->rq_respages[resp->rqstp->rq_resused-1]); | |
2204 | readdir->common.err = 0; | |
2205 | readdir->buflen = maxcount; | |
2206 | readdir->buffer = page; | |
2207 | readdir->offset = NULL; | |
2208 | ||
2209 | offset = readdir->rd_cookie; | |
2210 | nfserr = nfsd_readdir(readdir->rd_rqstp, readdir->rd_fhp, | |
2211 | &offset, | |
2212 | &readdir->common, nfsd4_encode_dirent); | |
2213 | if (nfserr == nfs_ok && | |
2214 | readdir->common.err == nfserr_toosmall && | |
2215 | readdir->buffer == page) | |
2216 | nfserr = nfserr_toosmall; | |
2217 | if (nfserr == nfserr_symlink) | |
2218 | nfserr = nfserr_notdir; | |
2219 | if (nfserr) | |
2220 | goto err_no_verf; | |
2221 | ||
2222 | if (readdir->offset) | |
2223 | xdr_encode_hyper(readdir->offset, offset); | |
2224 | ||
2225 | p = readdir->buffer; | |
2226 | *p++ = 0; /* no more entries */ | |
2227 | *p++ = htonl(readdir->common.err == nfserr_eof); | |
2228 | resp->xbuf->page_len = ((char*)p) - (char*)page_address(resp->rqstp->rq_respages[resp->rqstp->rq_resused-1]); | |
2229 | ||
2230 | /* allocate a page for the tail */ | |
2231 | svc_take_page(resp->rqstp); | |
2232 | resp->xbuf->tail[0].iov_base = | |
2233 | page_address(resp->rqstp->rq_respages[resp->rqstp->rq_resused-1]); | |
2234 | resp->rqstp->rq_restailpage = resp->rqstp->rq_resused-1; | |
2235 | resp->xbuf->tail[0].iov_len = 0; | |
2236 | resp->p = resp->xbuf->tail[0].iov_base; | |
2237 | resp->end = resp->p + PAGE_SIZE/4; | |
2238 | ||
2239 | return 0; | |
2240 | err_no_verf: | |
2241 | p = savep; | |
2242 | ADJUST_ARGS(); | |
2243 | return nfserr; | |
2244 | } | |
2245 | ||
2246 | static void | |
2247 | nfsd4_encode_remove(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_remove *remove) | |
2248 | { | |
2249 | ENCODE_HEAD; | |
2250 | ||
2251 | if (!nfserr) { | |
2252 | RESERVE_SPACE(20); | |
2253 | WRITECINFO(remove->rm_cinfo); | |
2254 | ADJUST_ARGS(); | |
2255 | } | |
2256 | } | |
2257 | ||
2258 | static void | |
2259 | nfsd4_encode_rename(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_rename *rename) | |
2260 | { | |
2261 | ENCODE_HEAD; | |
2262 | ||
2263 | if (!nfserr) { | |
2264 | RESERVE_SPACE(40); | |
2265 | WRITECINFO(rename->rn_sinfo); | |
2266 | WRITECINFO(rename->rn_tinfo); | |
2267 | ADJUST_ARGS(); | |
2268 | } | |
2269 | } | |
2270 | ||
2271 | /* | |
2272 | * The SETATTR encode routine is special -- it always encodes a bitmap, | |
2273 | * regardless of the error status. | |
2274 | */ | |
2275 | static void | |
2276 | nfsd4_encode_setattr(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_setattr *setattr) | |
2277 | { | |
2278 | ENCODE_HEAD; | |
2279 | ||
2280 | RESERVE_SPACE(12); | |
2281 | if (nfserr) { | |
2282 | WRITE32(2); | |
2283 | WRITE32(0); | |
2284 | WRITE32(0); | |
2285 | } | |
2286 | else { | |
2287 | WRITE32(2); | |
2288 | WRITE32(setattr->sa_bmval[0]); | |
2289 | WRITE32(setattr->sa_bmval[1]); | |
2290 | } | |
2291 | ADJUST_ARGS(); | |
2292 | } | |
2293 | ||
2294 | static void | |
2295 | nfsd4_encode_setclientid(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_setclientid *scd) | |
2296 | { | |
2297 | ENCODE_HEAD; | |
2298 | ||
2299 | if (!nfserr) { | |
2300 | RESERVE_SPACE(8 + sizeof(nfs4_verifier)); | |
2301 | WRITEMEM(&scd->se_clientid, 8); | |
2302 | WRITEMEM(&scd->se_confirm, sizeof(nfs4_verifier)); | |
2303 | ADJUST_ARGS(); | |
2304 | } | |
2305 | else if (nfserr == nfserr_clid_inuse) { | |
2306 | RESERVE_SPACE(8); | |
2307 | WRITE32(0); | |
2308 | WRITE32(0); | |
2309 | ADJUST_ARGS(); | |
2310 | } | |
2311 | } | |
2312 | ||
2313 | static void | |
2314 | nfsd4_encode_write(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_write *write) | |
2315 | { | |
2316 | ENCODE_HEAD; | |
2317 | ||
2318 | if (!nfserr) { | |
2319 | RESERVE_SPACE(16); | |
2320 | WRITE32(write->wr_bytes_written); | |
2321 | WRITE32(write->wr_how_written); | |
2322 | WRITEMEM(write->wr_verifier.data, 8); | |
2323 | ADJUST_ARGS(); | |
2324 | } | |
2325 | } | |
2326 | ||
2327 | void | |
2328 | nfsd4_encode_operation(struct nfsd4_compoundres *resp, struct nfsd4_op *op) | |
2329 | { | |
2330 | u32 *statp; | |
2331 | ENCODE_HEAD; | |
2332 | ||
2333 | RESERVE_SPACE(8); | |
2334 | WRITE32(op->opnum); | |
2335 | statp = p++; /* to be backfilled at the end */ | |
2336 | ADJUST_ARGS(); | |
2337 | ||
2338 | switch (op->opnum) { | |
2339 | case OP_ACCESS: | |
2340 | nfsd4_encode_access(resp, op->status, &op->u.access); | |
2341 | break; | |
2342 | case OP_CLOSE: | |
2343 | nfsd4_encode_close(resp, op->status, &op->u.close); | |
2344 | break; | |
2345 | case OP_COMMIT: | |
2346 | nfsd4_encode_commit(resp, op->status, &op->u.commit); | |
2347 | break; | |
2348 | case OP_CREATE: | |
2349 | nfsd4_encode_create(resp, op->status, &op->u.create); | |
2350 | break; | |
2351 | case OP_DELEGRETURN: | |
2352 | break; | |
2353 | case OP_GETATTR: | |
2354 | op->status = nfsd4_encode_getattr(resp, op->status, &op->u.getattr); | |
2355 | break; | |
2356 | case OP_GETFH: | |
2357 | nfsd4_encode_getfh(resp, op->status, op->u.getfh); | |
2358 | break; | |
2359 | case OP_LINK: | |
2360 | nfsd4_encode_link(resp, op->status, &op->u.link); | |
2361 | break; | |
2362 | case OP_LOCK: | |
2363 | nfsd4_encode_lock(resp, op->status, &op->u.lock); | |
2364 | break; | |
2365 | case OP_LOCKT: | |
2366 | nfsd4_encode_lockt(resp, op->status, &op->u.lockt); | |
2367 | break; | |
2368 | case OP_LOCKU: | |
2369 | nfsd4_encode_locku(resp, op->status, &op->u.locku); | |
2370 | break; | |
2371 | case OP_LOOKUP: | |
2372 | break; | |
2373 | case OP_LOOKUPP: | |
2374 | break; | |
2375 | case OP_NVERIFY: | |
2376 | break; | |
2377 | case OP_OPEN: | |
2378 | nfsd4_encode_open(resp, op->status, &op->u.open); | |
2379 | break; | |
2380 | case OP_OPEN_CONFIRM: | |
2381 | nfsd4_encode_open_confirm(resp, op->status, &op->u.open_confirm); | |
2382 | break; | |
2383 | case OP_OPEN_DOWNGRADE: | |
2384 | nfsd4_encode_open_downgrade(resp, op->status, &op->u.open_downgrade); | |
2385 | break; | |
2386 | case OP_PUTFH: | |
2387 | break; | |
2388 | case OP_PUTROOTFH: | |
2389 | break; | |
2390 | case OP_READ: | |
2391 | op->status = nfsd4_encode_read(resp, op->status, &op->u.read); | |
2392 | break; | |
2393 | case OP_READDIR: | |
2394 | op->status = nfsd4_encode_readdir(resp, op->status, &op->u.readdir); | |
2395 | break; | |
2396 | case OP_READLINK: | |
2397 | op->status = nfsd4_encode_readlink(resp, op->status, &op->u.readlink); | |
2398 | break; | |
2399 | case OP_REMOVE: | |
2400 | nfsd4_encode_remove(resp, op->status, &op->u.remove); | |
2401 | break; | |
2402 | case OP_RENAME: | |
2403 | nfsd4_encode_rename(resp, op->status, &op->u.rename); | |
2404 | break; | |
2405 | case OP_RENEW: | |
2406 | break; | |
2407 | case OP_RESTOREFH: | |
2408 | break; | |
2409 | case OP_SAVEFH: | |
2410 | break; | |
2411 | case OP_SETATTR: | |
2412 | nfsd4_encode_setattr(resp, op->status, &op->u.setattr); | |
2413 | break; | |
2414 | case OP_SETCLIENTID: | |
2415 | nfsd4_encode_setclientid(resp, op->status, &op->u.setclientid); | |
2416 | break; | |
2417 | case OP_SETCLIENTID_CONFIRM: | |
2418 | break; | |
2419 | case OP_VERIFY: | |
2420 | break; | |
2421 | case OP_WRITE: | |
2422 | nfsd4_encode_write(resp, op->status, &op->u.write); | |
2423 | break; | |
2424 | case OP_RELEASE_LOCKOWNER: | |
2425 | break; | |
2426 | default: | |
2427 | break; | |
2428 | } | |
2429 | ||
2430 | /* | |
2431 | * Note: We write the status directly, instead of using WRITE32(), | |
2432 | * since it is already in network byte order. | |
2433 | */ | |
2434 | *statp = op->status; | |
2435 | } | |
2436 | ||
2437 | /* | |
2438 | * Encode the reply stored in the stateowner reply cache | |
2439 | * | |
2440 | * XDR note: do not encode rp->rp_buflen: the buffer contains the | |
2441 | * previously sent already encoded operation. | |
2442 | * | |
2443 | * called with nfs4_lock_state() held | |
2444 | */ | |
2445 | void | |
2446 | nfsd4_encode_replay(struct nfsd4_compoundres *resp, struct nfsd4_op *op) | |
2447 | { | |
2448 | ENCODE_HEAD; | |
2449 | struct nfs4_replay *rp = op->replay; | |
2450 | ||
2451 | BUG_ON(!rp); | |
2452 | ||
2453 | RESERVE_SPACE(8); | |
2454 | WRITE32(op->opnum); | |
2455 | *p++ = rp->rp_status; /* already xdr'ed */ | |
2456 | ADJUST_ARGS(); | |
2457 | ||
2458 | RESERVE_SPACE(rp->rp_buflen); | |
2459 | WRITEMEM(rp->rp_buf, rp->rp_buflen); | |
2460 | ADJUST_ARGS(); | |
2461 | } | |
2462 | ||
2463 | /* | |
2464 | * END OF "GENERIC" ENCODE ROUTINES. | |
2465 | */ | |
2466 | ||
2467 | int | |
2468 | nfs4svc_encode_voidres(struct svc_rqst *rqstp, u32 *p, void *dummy) | |
2469 | { | |
2470 | return xdr_ressize_check(rqstp, p); | |
2471 | } | |
2472 | ||
2473 | void nfsd4_release_compoundargs(struct nfsd4_compoundargs *args) | |
2474 | { | |
2475 | if (args->ops != args->iops) { | |
2476 | kfree(args->ops); | |
2477 | args->ops = args->iops; | |
2478 | } | |
2479 | if (args->tmpp) { | |
2480 | kfree(args->tmpp); | |
2481 | args->tmpp = NULL; | |
2482 | } | |
2483 | while (args->to_free) { | |
2484 | struct tmpbuf *tb = args->to_free; | |
2485 | args->to_free = tb->next; | |
2486 | tb->release(tb->buf); | |
2487 | kfree(tb); | |
2488 | } | |
2489 | } | |
2490 | ||
2491 | int | |
2492 | nfs4svc_decode_compoundargs(struct svc_rqst *rqstp, u32 *p, struct nfsd4_compoundargs *args) | |
2493 | { | |
2494 | int status; | |
2495 | ||
2496 | args->p = p; | |
2497 | args->end = rqstp->rq_arg.head[0].iov_base + rqstp->rq_arg.head[0].iov_len; | |
2498 | args->pagelist = rqstp->rq_arg.pages; | |
2499 | args->pagelen = rqstp->rq_arg.page_len; | |
2500 | args->tmpp = NULL; | |
2501 | args->to_free = NULL; | |
2502 | args->ops = args->iops; | |
2503 | args->rqstp = rqstp; | |
2504 | ||
2505 | status = nfsd4_decode_compound(args); | |
2506 | if (status) { | |
2507 | nfsd4_release_compoundargs(args); | |
2508 | } | |
2509 | return !status; | |
2510 | } | |
2511 | ||
2512 | int | |
2513 | nfs4svc_encode_compoundres(struct svc_rqst *rqstp, u32 *p, struct nfsd4_compoundres *resp) | |
2514 | { | |
2515 | /* | |
2516 | * All that remains is to write the tag and operation count... | |
2517 | */ | |
2518 | struct kvec *iov; | |
2519 | p = resp->tagp; | |
2520 | *p++ = htonl(resp->taglen); | |
2521 | memcpy(p, resp->tag, resp->taglen); | |
2522 | p += XDR_QUADLEN(resp->taglen); | |
2523 | *p++ = htonl(resp->opcnt); | |
2524 | ||
2525 | if (rqstp->rq_res.page_len) | |
2526 | iov = &rqstp->rq_res.tail[0]; | |
2527 | else | |
2528 | iov = &rqstp->rq_res.head[0]; | |
2529 | iov->iov_len = ((char*)resp->p) - (char*)iov->iov_base; | |
2530 | BUG_ON(iov->iov_len > PAGE_SIZE); | |
2531 | return 1; | |
2532 | } | |
2533 | ||
2534 | /* | |
2535 | * Local variables: | |
2536 | * c-basic-offset: 8 | |
2537 | * End: | |
2538 | */ |