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Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * linux/fs/nfs/nfs3xdr.c | |
3 | * | |
4 | * XDR functions to encode/decode NFSv3 RPC arguments and results. | |
5 | * | |
6 | * Copyright (C) 1996, 1997 Olaf Kirch | |
7 | */ | |
8 | ||
9 | #include <linux/param.h> | |
10 | #include <linux/time.h> | |
11 | #include <linux/mm.h> | |
1da177e4 LT |
12 | #include <linux/errno.h> |
13 | #include <linux/string.h> | |
14 | #include <linux/in.h> | |
15 | #include <linux/pagemap.h> | |
16 | #include <linux/proc_fs.h> | |
17 | #include <linux/kdev_t.h> | |
18 | #include <linux/sunrpc/clnt.h> | |
19 | #include <linux/nfs.h> | |
20 | #include <linux/nfs3.h> | |
21 | #include <linux/nfs_fs.h> | |
b7fa0554 | 22 | #include <linux/nfsacl.h> |
f7b422b1 | 23 | #include "internal.h" |
1da177e4 LT |
24 | |
25 | #define NFSDBG_FACILITY NFSDBG_XDR | |
26 | ||
27 | /* Mapping from NFS error code to "errno" error code. */ | |
28 | #define errno_NFSERR_IO EIO | |
29 | ||
1da177e4 LT |
30 | /* |
31 | * Declare the space requirements for NFS arguments and replies as | |
32 | * number of 32bit-words | |
33 | */ | |
34 | #define NFS3_fhandle_sz (1+16) | |
35 | #define NFS3_fh_sz (NFS3_fhandle_sz) /* shorthand */ | |
36 | #define NFS3_sattr_sz (15) | |
37 | #define NFS3_filename_sz (1+(NFS3_MAXNAMLEN>>2)) | |
38 | #define NFS3_path_sz (1+(NFS3_MAXPATHLEN>>2)) | |
39 | #define NFS3_fattr_sz (21) | |
d9c407b1 | 40 | #define NFS3_cookieverf_sz (NFS3_COOKIEVERFSIZE>>2) |
1da177e4 LT |
41 | #define NFS3_wcc_attr_sz (6) |
42 | #define NFS3_pre_op_attr_sz (1+NFS3_wcc_attr_sz) | |
43 | #define NFS3_post_op_attr_sz (1+NFS3_fattr_sz) | |
44 | #define NFS3_wcc_data_sz (NFS3_pre_op_attr_sz+NFS3_post_op_attr_sz) | |
45 | #define NFS3_fsstat_sz | |
46 | #define NFS3_fsinfo_sz | |
47 | #define NFS3_pathconf_sz | |
48 | #define NFS3_entry_sz (NFS3_filename_sz+3) | |
1da177e4 | 49 | #define NFS3_diropargs_sz (NFS3_fh_sz+NFS3_filename_sz) |
ad96b5b5 CL |
50 | |
51 | #define NFS3_getattrargs_sz (NFS3_fh_sz) | |
52 | #define NFS3_setattrargs_sz (NFS3_fh_sz+NFS3_sattr_sz+3) | |
53 | #define NFS3_lookupargs_sz (NFS3_fh_sz+NFS3_filename_sz) | |
1da177e4 LT |
54 | #define NFS3_accessargs_sz (NFS3_fh_sz+1) |
55 | #define NFS3_readlinkargs_sz (NFS3_fh_sz) | |
56 | #define NFS3_readargs_sz (NFS3_fh_sz+3) | |
57 | #define NFS3_writeargs_sz (NFS3_fh_sz+5) | |
58 | #define NFS3_createargs_sz (NFS3_diropargs_sz+NFS3_sattr_sz) | |
59 | #define NFS3_mkdirargs_sz (NFS3_diropargs_sz+NFS3_sattr_sz) | |
94a6d753 | 60 | #define NFS3_symlinkargs_sz (NFS3_diropargs_sz+1+NFS3_sattr_sz) |
1da177e4 | 61 | #define NFS3_mknodargs_sz (NFS3_diropargs_sz+2+NFS3_sattr_sz) |
ad96b5b5 | 62 | #define NFS3_removeargs_sz (NFS3_fh_sz+NFS3_filename_sz) |
1da177e4 LT |
63 | #define NFS3_renameargs_sz (NFS3_diropargs_sz+NFS3_diropargs_sz) |
64 | #define NFS3_linkargs_sz (NFS3_fh_sz+NFS3_diropargs_sz) | |
d9c407b1 CL |
65 | #define NFS3_readdirargs_sz (NFS3_fh_sz+NFS3_cookieverf_sz+3) |
66 | #define NFS3_readdirplusargs_sz (NFS3_fh_sz+NFS3_cookieverf_sz+4) | |
1da177e4 LT |
67 | #define NFS3_commitargs_sz (NFS3_fh_sz+3) |
68 | ||
69 | #define NFS3_attrstat_sz (1+NFS3_fattr_sz) | |
70 | #define NFS3_wccstat_sz (1+NFS3_wcc_data_sz) | |
4fdc17b2 | 71 | #define NFS3_removeres_sz (NFS3_wccstat_sz) |
1da177e4 LT |
72 | #define NFS3_lookupres_sz (1+NFS3_fh_sz+(2 * NFS3_post_op_attr_sz)) |
73 | #define NFS3_accessres_sz (1+NFS3_post_op_attr_sz+1) | |
74 | #define NFS3_readlinkres_sz (1+NFS3_post_op_attr_sz+1) | |
75 | #define NFS3_readres_sz (1+NFS3_post_op_attr_sz+3) | |
76 | #define NFS3_writeres_sz (1+NFS3_wcc_data_sz+4) | |
77 | #define NFS3_createres_sz (1+NFS3_fh_sz+NFS3_post_op_attr_sz+NFS3_wcc_data_sz) | |
78 | #define NFS3_renameres_sz (1+(2 * NFS3_wcc_data_sz)) | |
79 | #define NFS3_linkres_sz (1+NFS3_post_op_attr_sz+NFS3_wcc_data_sz) | |
80 | #define NFS3_readdirres_sz (1+NFS3_post_op_attr_sz+2) | |
81 | #define NFS3_fsstatres_sz (1+NFS3_post_op_attr_sz+13) | |
82 | #define NFS3_fsinfores_sz (1+NFS3_post_op_attr_sz+12) | |
83 | #define NFS3_pathconfres_sz (1+NFS3_post_op_attr_sz+6) | |
84 | #define NFS3_commitres_sz (1+NFS3_wcc_data_sz+2) | |
85 | ||
b7fa0554 | 86 | #define ACL3_getaclargs_sz (NFS3_fh_sz+1) |
ae46141f TM |
87 | #define ACL3_setaclargs_sz (NFS3_fh_sz+1+ \ |
88 | XDR_QUADLEN(NFS_ACL_INLINE_BUFSIZE)) | |
89 | #define ACL3_getaclres_sz (1+NFS3_post_op_attr_sz+1+ \ | |
90 | XDR_QUADLEN(NFS_ACL_INLINE_BUFSIZE)) | |
b7fa0554 AG |
91 | #define ACL3_setaclres_sz (1+NFS3_post_op_attr_sz) |
92 | ||
1da177e4 LT |
93 | /* |
94 | * Map file type to S_IFMT bits | |
95 | */ | |
bca79478 TM |
96 | static const umode_t nfs_type2fmt[] = { |
97 | [NF3BAD] = 0, | |
98 | [NF3REG] = S_IFREG, | |
99 | [NF3DIR] = S_IFDIR, | |
100 | [NF3BLK] = S_IFBLK, | |
101 | [NF3CHR] = S_IFCHR, | |
102 | [NF3LNK] = S_IFLNK, | |
103 | [NF3SOCK] = S_IFSOCK, | |
104 | [NF3FIFO] = S_IFIFO, | |
1da177e4 LT |
105 | }; |
106 | ||
d9c407b1 CL |
107 | /* |
108 | * While encoding arguments, set up the reply buffer in advance to | |
109 | * receive reply data directly into the page cache. | |
110 | */ | |
111 | static void prepare_reply_buffer(struct rpc_rqst *req, struct page **pages, | |
112 | unsigned int base, unsigned int len, | |
113 | unsigned int bufsize) | |
114 | { | |
115 | struct rpc_auth *auth = req->rq_cred->cr_auth; | |
116 | unsigned int replen; | |
117 | ||
118 | replen = RPC_REPHDRSIZE + auth->au_rslack + bufsize; | |
119 | xdr_inline_pages(&req->rq_rcv_buf, replen << 2, pages, base, len); | |
120 | } | |
121 | ||
e4f93234 CL |
122 | /* |
123 | * Handle decode buffer overflows out-of-line. | |
124 | */ | |
125 | static void print_overflow_msg(const char *func, const struct xdr_stream *xdr) | |
126 | { | |
127 | dprintk("NFS: %s prematurely hit the end of our receive buffer. " | |
128 | "Remaining buffer length is %tu words.\n", | |
129 | func, xdr->end - xdr->p); | |
130 | } | |
131 | ||
d9c407b1 | 132 | |
1da177e4 LT |
133 | /* |
134 | * Common NFS XDR functions as inlines | |
135 | */ | |
d61005a6 AV |
136 | static inline __be32 * |
137 | xdr_decode_fhandle(__be32 *p, struct nfs_fh *fh) | |
1da177e4 LT |
138 | { |
139 | if ((fh->size = ntohl(*p++)) <= NFS3_FHSIZE) { | |
140 | memcpy(fh->data, p, fh->size); | |
141 | return p + XDR_QUADLEN(fh->size); | |
142 | } | |
143 | return NULL; | |
144 | } | |
145 | ||
babddc72 BS |
146 | static inline __be32 * |
147 | xdr_decode_fhandle_stream(struct xdr_stream *xdr, struct nfs_fh *fh) | |
148 | { | |
149 | __be32 *p; | |
150 | p = xdr_inline_decode(xdr, 4); | |
151 | if (unlikely(!p)) | |
152 | goto out_overflow; | |
153 | fh->size = ntohl(*p++); | |
154 | ||
155 | if (fh->size <= NFS3_FHSIZE) { | |
156 | p = xdr_inline_decode(xdr, fh->size); | |
157 | if (unlikely(!p)) | |
158 | goto out_overflow; | |
159 | memcpy(fh->data, p, fh->size); | |
160 | return p + XDR_QUADLEN(fh->size); | |
161 | } | |
162 | return NULL; | |
163 | ||
164 | out_overflow: | |
165 | print_overflow_msg(__func__, xdr); | |
166 | return ERR_PTR(-EIO); | |
167 | } | |
168 | ||
1da177e4 LT |
169 | /* |
170 | * Encode/decode time. | |
171 | */ | |
d61005a6 AV |
172 | static inline __be32 * |
173 | xdr_decode_time3(__be32 *p, struct timespec *timep) | |
1da177e4 LT |
174 | { |
175 | timep->tv_sec = ntohl(*p++); | |
176 | timep->tv_nsec = ntohl(*p++); | |
177 | return p; | |
178 | } | |
179 | ||
d61005a6 AV |
180 | static __be32 * |
181 | xdr_decode_fattr(__be32 *p, struct nfs_fattr *fattr) | |
1da177e4 LT |
182 | { |
183 | unsigned int type, major, minor; | |
bca79478 | 184 | umode_t fmode; |
1da177e4 LT |
185 | |
186 | type = ntohl(*p++); | |
bca79478 TM |
187 | if (type > NF3FIFO) |
188 | type = NF3NON; | |
189 | fmode = nfs_type2fmt[type]; | |
1da177e4 LT |
190 | fattr->mode = (ntohl(*p++) & ~S_IFMT) | fmode; |
191 | fattr->nlink = ntohl(*p++); | |
192 | fattr->uid = ntohl(*p++); | |
193 | fattr->gid = ntohl(*p++); | |
194 | p = xdr_decode_hyper(p, &fattr->size); | |
195 | p = xdr_decode_hyper(p, &fattr->du.nfs3.used); | |
196 | ||
197 | /* Turn remote device info into Linux-specific dev_t */ | |
198 | major = ntohl(*p++); | |
199 | minor = ntohl(*p++); | |
200 | fattr->rdev = MKDEV(major, minor); | |
201 | if (MAJOR(fattr->rdev) != major || MINOR(fattr->rdev) != minor) | |
202 | fattr->rdev = 0; | |
203 | ||
8b4bdcf8 TM |
204 | p = xdr_decode_hyper(p, &fattr->fsid.major); |
205 | fattr->fsid.minor = 0; | |
1da177e4 LT |
206 | p = xdr_decode_hyper(p, &fattr->fileid); |
207 | p = xdr_decode_time3(p, &fattr->atime); | |
208 | p = xdr_decode_time3(p, &fattr->mtime); | |
209 | p = xdr_decode_time3(p, &fattr->ctime); | |
210 | ||
211 | /* Update the mode bits */ | |
9e6e70f8 | 212 | fattr->valid |= NFS_ATTR_FATTR_V3; |
1da177e4 LT |
213 | return p; |
214 | } | |
215 | ||
d61005a6 AV |
216 | static inline __be32 * |
217 | xdr_decode_wcc_attr(__be32 *p, struct nfs_fattr *fattr) | |
1da177e4 LT |
218 | { |
219 | p = xdr_decode_hyper(p, &fattr->pre_size); | |
220 | p = xdr_decode_time3(p, &fattr->pre_mtime); | |
221 | p = xdr_decode_time3(p, &fattr->pre_ctime); | |
9e6e70f8 TM |
222 | fattr->valid |= NFS_ATTR_FATTR_PRESIZE |
223 | | NFS_ATTR_FATTR_PREMTIME | |
224 | | NFS_ATTR_FATTR_PRECTIME; | |
1da177e4 LT |
225 | return p; |
226 | } | |
227 | ||
d61005a6 AV |
228 | static inline __be32 * |
229 | xdr_decode_post_op_attr(__be32 *p, struct nfs_fattr *fattr) | |
1da177e4 LT |
230 | { |
231 | if (*p++) | |
232 | p = xdr_decode_fattr(p, fattr); | |
233 | return p; | |
234 | } | |
235 | ||
babddc72 BS |
236 | static inline __be32 * |
237 | xdr_decode_post_op_attr_stream(struct xdr_stream *xdr, struct nfs_fattr *fattr) | |
238 | { | |
239 | __be32 *p; | |
240 | ||
241 | p = xdr_inline_decode(xdr, 4); | |
242 | if (unlikely(!p)) | |
243 | goto out_overflow; | |
244 | if (ntohl(*p++)) { | |
245 | p = xdr_inline_decode(xdr, 84); | |
246 | if (unlikely(!p)) | |
247 | goto out_overflow; | |
248 | p = xdr_decode_fattr(p, fattr); | |
249 | } | |
250 | return p; | |
251 | out_overflow: | |
252 | print_overflow_msg(__func__, xdr); | |
253 | return ERR_PTR(-EIO); | |
254 | } | |
255 | ||
d61005a6 AV |
256 | static inline __be32 * |
257 | xdr_decode_pre_op_attr(__be32 *p, struct nfs_fattr *fattr) | |
1da177e4 LT |
258 | { |
259 | if (*p++) | |
260 | return xdr_decode_wcc_attr(p, fattr); | |
261 | return p; | |
262 | } | |
263 | ||
264 | ||
d61005a6 AV |
265 | static inline __be32 * |
266 | xdr_decode_wcc_data(__be32 *p, struct nfs_fattr *fattr) | |
1da177e4 LT |
267 | { |
268 | p = xdr_decode_pre_op_attr(p, fattr); | |
269 | return xdr_decode_post_op_attr(p, fattr); | |
270 | } | |
271 | ||
d9c407b1 CL |
272 | |
273 | /* | |
274 | * Encode/decode NFSv3 basic data types | |
275 | * | |
276 | * Basic NFSv3 data types are defined in section 2.5 of RFC 1813: | |
277 | * "NFS Version 3 Protocol Specification". | |
278 | * | |
279 | * Not all basic data types have their own encoding and decoding | |
280 | * functions. For run-time efficiency, some data types are encoded | |
281 | * or decoded inline. | |
282 | */ | |
283 | ||
284 | static void encode_uint32(struct xdr_stream *xdr, u32 value) | |
285 | { | |
286 | __be32 *p = xdr_reserve_space(xdr, 4); | |
287 | *p = cpu_to_be32(value); | |
288 | } | |
289 | ||
e4f93234 CL |
290 | static int decode_uint32(struct xdr_stream *xdr, u32 *value) |
291 | { | |
292 | __be32 *p; | |
293 | ||
294 | p = xdr_inline_decode(xdr, 4); | |
295 | if (unlikely(p == NULL)) | |
296 | goto out_overflow; | |
297 | *value = be32_to_cpup(p); | |
298 | return 0; | |
299 | out_overflow: | |
300 | print_overflow_msg(__func__, xdr); | |
301 | return -EIO; | |
302 | } | |
303 | ||
304 | static int decode_uint64(struct xdr_stream *xdr, u64 *value) | |
305 | { | |
306 | __be32 *p; | |
307 | ||
308 | p = xdr_inline_decode(xdr, 8); | |
309 | if (unlikely(p == NULL)) | |
310 | goto out_overflow; | |
311 | xdr_decode_hyper(p, value); | |
312 | return 0; | |
313 | out_overflow: | |
314 | print_overflow_msg(__func__, xdr); | |
315 | return -EIO; | |
316 | } | |
317 | ||
318 | /* | |
319 | * fileid3 | |
320 | * | |
321 | * typedef uint64 fileid3; | |
322 | */ | |
323 | static int decode_fileid3(struct xdr_stream *xdr, u64 *fileid) | |
324 | { | |
325 | return decode_uint64(xdr, fileid); | |
326 | } | |
327 | ||
d9c407b1 CL |
328 | /* |
329 | * filename3 | |
330 | * | |
331 | * typedef string filename3<>; | |
332 | */ | |
333 | static void encode_filename3(struct xdr_stream *xdr, | |
334 | const char *name, u32 length) | |
335 | { | |
336 | __be32 *p; | |
337 | ||
338 | BUG_ON(length > NFS3_MAXNAMLEN); | |
339 | p = xdr_reserve_space(xdr, 4 + length); | |
340 | xdr_encode_opaque(p, name, length); | |
341 | } | |
342 | ||
e4f93234 CL |
343 | static int decode_inline_filename3(struct xdr_stream *xdr, |
344 | const char **name, u32 *length) | |
345 | { | |
346 | __be32 *p; | |
347 | u32 count; | |
348 | ||
349 | p = xdr_inline_decode(xdr, 4); | |
350 | if (unlikely(p == NULL)) | |
351 | goto out_overflow; | |
352 | count = be32_to_cpup(p); | |
353 | if (count > NFS3_MAXNAMLEN) | |
354 | goto out_nametoolong; | |
355 | p = xdr_inline_decode(xdr, count); | |
356 | if (unlikely(p == NULL)) | |
357 | goto out_overflow; | |
358 | *name = (const char *)p; | |
359 | *length = count; | |
360 | return 0; | |
361 | ||
362 | out_nametoolong: | |
363 | dprintk("NFS: returned filename too long: %u\n", count); | |
364 | return -ENAMETOOLONG; | |
365 | out_overflow: | |
366 | print_overflow_msg(__func__, xdr); | |
367 | return -EIO; | |
368 | } | |
369 | ||
d9c407b1 CL |
370 | /* |
371 | * nfspath3 | |
372 | * | |
373 | * typedef string nfspath3<>; | |
374 | */ | |
375 | static void encode_nfspath3(struct xdr_stream *xdr, struct page **pages, | |
376 | const u32 length) | |
377 | { | |
378 | BUG_ON(length > NFS3_MAXPATHLEN); | |
379 | encode_uint32(xdr, length); | |
380 | xdr_write_pages(xdr, pages, 0, length); | |
381 | } | |
382 | ||
e4f93234 CL |
383 | static int decode_nfspath3(struct xdr_stream *xdr) |
384 | { | |
385 | u32 recvd, count; | |
386 | size_t hdrlen; | |
387 | __be32 *p; | |
388 | ||
389 | p = xdr_inline_decode(xdr, 4); | |
390 | if (unlikely(p == NULL)) | |
391 | goto out_overflow; | |
392 | count = be32_to_cpup(p); | |
393 | if (unlikely(count >= xdr->buf->page_len || count > NFS3_MAXPATHLEN)) | |
394 | goto out_nametoolong; | |
395 | hdrlen = (u8 *)xdr->p - (u8 *)xdr->iov->iov_base; | |
396 | recvd = xdr->buf->len - hdrlen; | |
397 | if (unlikely(count > recvd)) | |
398 | goto out_cheating; | |
399 | ||
400 | xdr_read_pages(xdr, count); | |
401 | xdr_terminate_string(xdr->buf, count); | |
402 | return 0; | |
403 | ||
404 | out_nametoolong: | |
405 | dprintk("NFS: returned pathname too long: %u\n", count); | |
406 | return -ENAMETOOLONG; | |
407 | out_cheating: | |
408 | dprintk("NFS: server cheating in pathname result: " | |
409 | "count %u > recvd %u\n", count, recvd); | |
410 | return -EIO; | |
411 | out_overflow: | |
412 | print_overflow_msg(__func__, xdr); | |
413 | return -EIO; | |
414 | } | |
415 | ||
d9c407b1 CL |
416 | /* |
417 | * cookie3 | |
418 | * | |
419 | * typedef uint64 cookie3 | |
420 | */ | |
421 | static __be32 *xdr_encode_cookie3(__be32 *p, u64 cookie) | |
422 | { | |
423 | return xdr_encode_hyper(p, cookie); | |
424 | } | |
425 | ||
e4f93234 CL |
426 | static int decode_cookie3(struct xdr_stream *xdr, u64 *cookie) |
427 | { | |
428 | return decode_uint64(xdr, cookie); | |
429 | } | |
430 | ||
d9c407b1 CL |
431 | /* |
432 | * cookieverf3 | |
433 | * | |
434 | * typedef opaque cookieverf3[NFS3_COOKIEVERFSIZE]; | |
435 | */ | |
436 | static __be32 *xdr_encode_cookieverf3(__be32 *p, const __be32 *verifier) | |
437 | { | |
438 | memcpy(p, verifier, NFS3_COOKIEVERFSIZE); | |
439 | return p + XDR_QUADLEN(NFS3_COOKIEVERFSIZE); | |
440 | } | |
441 | ||
e4f93234 CL |
442 | static int decode_cookieverf3(struct xdr_stream *xdr, __be32 *verifier) |
443 | { | |
444 | __be32 *p; | |
445 | ||
446 | p = xdr_inline_decode(xdr, NFS3_COOKIEVERFSIZE); | |
447 | if (unlikely(p == NULL)) | |
448 | goto out_overflow; | |
449 | memcpy(verifier, p, NFS3_COOKIEVERFSIZE); | |
450 | return 0; | |
451 | out_overflow: | |
452 | print_overflow_msg(__func__, xdr); | |
453 | return -EIO; | |
454 | } | |
455 | ||
d9c407b1 CL |
456 | /* |
457 | * createverf3 | |
458 | * | |
459 | * typedef opaque createverf3[NFS3_CREATEVERFSIZE]; | |
460 | */ | |
461 | static void encode_createverf3(struct xdr_stream *xdr, const __be32 *verifier) | |
462 | { | |
463 | __be32 *p; | |
464 | ||
465 | p = xdr_reserve_space(xdr, NFS3_CREATEVERFSIZE); | |
466 | memcpy(p, verifier, NFS3_CREATEVERFSIZE); | |
467 | } | |
468 | ||
e4f93234 CL |
469 | static int decode_writeverf3(struct xdr_stream *xdr, __be32 *verifier) |
470 | { | |
471 | __be32 *p; | |
472 | ||
473 | p = xdr_inline_decode(xdr, NFS3_WRITEVERFSIZE); | |
474 | if (unlikely(p == NULL)) | |
475 | goto out_overflow; | |
476 | memcpy(verifier, p, NFS3_WRITEVERFSIZE); | |
477 | return 0; | |
478 | out_overflow: | |
479 | print_overflow_msg(__func__, xdr); | |
480 | return -EIO; | |
481 | } | |
482 | ||
483 | /* | |
484 | * size3 | |
485 | * | |
486 | * typedef uint64 size3; | |
487 | */ | |
488 | static __be32 *xdr_decode_size3(__be32 *p, u64 *size) | |
489 | { | |
490 | return xdr_decode_hyper(p, size); | |
491 | } | |
492 | ||
493 | /* | |
494 | * nfsstat3 | |
495 | * | |
496 | * enum nfsstat3 { | |
497 | * NFS3_OK = 0, | |
498 | * ... | |
499 | * } | |
500 | */ | |
501 | #define NFS3_OK NFS_OK | |
502 | ||
503 | static int decode_nfsstat3(struct xdr_stream *xdr, enum nfs_stat *status) | |
504 | { | |
505 | __be32 *p; | |
506 | ||
507 | p = xdr_inline_decode(xdr, 4); | |
508 | if (unlikely(p == NULL)) | |
509 | goto out_overflow; | |
510 | *status = be32_to_cpup(p); | |
511 | return 0; | |
512 | out_overflow: | |
513 | print_overflow_msg(__func__, xdr); | |
514 | return -EIO; | |
515 | } | |
516 | ||
d9c407b1 CL |
517 | /* |
518 | * ftype3 | |
519 | * | |
520 | * enum ftype3 { | |
521 | * NF3REG = 1, | |
522 | * NF3DIR = 2, | |
523 | * NF3BLK = 3, | |
524 | * NF3CHR = 4, | |
525 | * NF3LNK = 5, | |
526 | * NF3SOCK = 6, | |
527 | * NF3FIFO = 7 | |
528 | * }; | |
529 | */ | |
530 | static void encode_ftype3(struct xdr_stream *xdr, const u32 type) | |
531 | { | |
532 | BUG_ON(type > NF3FIFO); | |
533 | encode_uint32(xdr, type); | |
534 | } | |
535 | ||
536 | /* | |
537 | * specdata3 | |
538 | * | |
539 | * struct specdata3 { | |
540 | * uint32 specdata1; | |
541 | * uint32 specdata2; | |
542 | * }; | |
543 | */ | |
544 | static void encode_specdata3(struct xdr_stream *xdr, const dev_t rdev) | |
545 | { | |
546 | __be32 *p; | |
547 | ||
548 | p = xdr_reserve_space(xdr, 8); | |
549 | *p++ = cpu_to_be32(MAJOR(rdev)); | |
550 | *p = cpu_to_be32(MINOR(rdev)); | |
551 | } | |
552 | ||
553 | /* | |
554 | * nfs_fh3 | |
555 | * | |
556 | * struct nfs_fh3 { | |
557 | * opaque data<NFS3_FHSIZE>; | |
558 | * }; | |
559 | */ | |
560 | static void encode_nfs_fh3(struct xdr_stream *xdr, const struct nfs_fh *fh) | |
561 | { | |
562 | __be32 *p; | |
563 | ||
564 | BUG_ON(fh->size > NFS3_FHSIZE); | |
565 | p = xdr_reserve_space(xdr, 4 + fh->size); | |
566 | xdr_encode_opaque(p, fh->data, fh->size); | |
567 | } | |
568 | ||
e4f93234 CL |
569 | static int decode_nfs_fh3(struct xdr_stream *xdr, struct nfs_fh *fh) |
570 | { | |
571 | u32 length; | |
572 | __be32 *p; | |
573 | ||
574 | p = xdr_inline_decode(xdr, 4); | |
575 | if (unlikely(p == NULL)) | |
576 | goto out_overflow; | |
577 | length = be32_to_cpup(p++); | |
578 | if (unlikely(length > NFS3_FHSIZE)) | |
579 | goto out_toobig; | |
580 | p = xdr_inline_decode(xdr, length); | |
581 | if (unlikely(p == NULL)) | |
582 | goto out_overflow; | |
583 | fh->size = length; | |
584 | memcpy(fh->data, p, length); | |
585 | return 0; | |
586 | out_toobig: | |
587 | dprintk("NFS: file handle size (%u) too big\n", length); | |
588 | return -E2BIG; | |
589 | out_overflow: | |
590 | print_overflow_msg(__func__, xdr); | |
591 | return -EIO; | |
592 | } | |
593 | ||
594 | static void zero_nfs_fh3(struct nfs_fh *fh) | |
595 | { | |
596 | memset(fh, 0, sizeof(*fh)); | |
597 | } | |
598 | ||
9d5a6434 CL |
599 | /* |
600 | * nfstime3 | |
601 | * | |
602 | * struct nfstime3 { | |
603 | * uint32 seconds; | |
604 | * uint32 nseconds; | |
605 | * }; | |
606 | */ | |
607 | static __be32 *xdr_encode_nfstime3(__be32 *p, const struct timespec *timep) | |
608 | { | |
609 | *p++ = cpu_to_be32(timep->tv_sec); | |
610 | *p++ = cpu_to_be32(timep->tv_nsec); | |
611 | return p; | |
612 | } | |
613 | ||
d9c407b1 CL |
614 | /* |
615 | * sattr3 | |
616 | * | |
617 | * enum time_how { | |
618 | * DONT_CHANGE = 0, | |
619 | * SET_TO_SERVER_TIME = 1, | |
620 | * SET_TO_CLIENT_TIME = 2 | |
621 | * }; | |
622 | * | |
623 | * union set_mode3 switch (bool set_it) { | |
624 | * case TRUE: | |
625 | * mode3 mode; | |
626 | * default: | |
627 | * void; | |
628 | * }; | |
629 | * | |
630 | * union set_uid3 switch (bool set_it) { | |
631 | * case TRUE: | |
632 | * uid3 uid; | |
633 | * default: | |
634 | * void; | |
635 | * }; | |
636 | * | |
637 | * union set_gid3 switch (bool set_it) { | |
638 | * case TRUE: | |
639 | * gid3 gid; | |
640 | * default: | |
641 | * void; | |
642 | * }; | |
643 | * | |
644 | * union set_size3 switch (bool set_it) { | |
645 | * case TRUE: | |
646 | * size3 size; | |
647 | * default: | |
648 | * void; | |
649 | * }; | |
650 | * | |
651 | * union set_atime switch (time_how set_it) { | |
652 | * case SET_TO_CLIENT_TIME: | |
653 | * nfstime3 atime; | |
654 | * default: | |
655 | * void; | |
656 | * }; | |
657 | * | |
658 | * union set_mtime switch (time_how set_it) { | |
659 | * case SET_TO_CLIENT_TIME: | |
660 | * nfstime3 mtime; | |
661 | * default: | |
662 | * void; | |
663 | * }; | |
664 | * | |
665 | * struct sattr3 { | |
666 | * set_mode3 mode; | |
667 | * set_uid3 uid; | |
668 | * set_gid3 gid; | |
669 | * set_size3 size; | |
670 | * set_atime atime; | |
671 | * set_mtime mtime; | |
672 | * }; | |
673 | */ | |
674 | static void encode_sattr3(struct xdr_stream *xdr, const struct iattr *attr) | |
675 | { | |
676 | u32 nbytes; | |
677 | __be32 *p; | |
678 | ||
679 | /* | |
680 | * In order to make only a single xdr_reserve_space() call, | |
681 | * pre-compute the total number of bytes to be reserved. | |
682 | * Six boolean values, one for each set_foo field, are always | |
683 | * present in the encoded result, so start there. | |
684 | */ | |
685 | nbytes = 6 * 4; | |
686 | if (attr->ia_valid & ATTR_MODE) | |
687 | nbytes += 4; | |
688 | if (attr->ia_valid & ATTR_UID) | |
689 | nbytes += 4; | |
690 | if (attr->ia_valid & ATTR_GID) | |
691 | nbytes += 4; | |
692 | if (attr->ia_valid & ATTR_SIZE) | |
693 | nbytes += 8; | |
694 | if (attr->ia_valid & ATTR_ATIME_SET) | |
695 | nbytes += 8; | |
696 | if (attr->ia_valid & ATTR_MTIME_SET) | |
697 | nbytes += 8; | |
698 | p = xdr_reserve_space(xdr, nbytes); | |
699 | ||
9d5a6434 CL |
700 | if (attr->ia_valid & ATTR_MODE) { |
701 | *p++ = xdr_one; | |
702 | *p++ = cpu_to_be32(attr->ia_mode & S_IALLUGO); | |
703 | } else | |
704 | *p++ = xdr_zero; | |
705 | ||
706 | if (attr->ia_valid & ATTR_UID) { | |
707 | *p++ = xdr_one; | |
708 | *p++ = cpu_to_be32(attr->ia_uid); | |
709 | } else | |
710 | *p++ = xdr_zero; | |
711 | ||
712 | if (attr->ia_valid & ATTR_GID) { | |
713 | *p++ = xdr_one; | |
714 | *p++ = cpu_to_be32(attr->ia_gid); | |
715 | } else | |
716 | *p++ = xdr_zero; | |
717 | ||
718 | if (attr->ia_valid & ATTR_SIZE) { | |
719 | *p++ = xdr_one; | |
720 | p = xdr_encode_hyper(p, (u64)attr->ia_size); | |
721 | } else | |
722 | *p++ = xdr_zero; | |
723 | ||
724 | if (attr->ia_valid & ATTR_ATIME_SET) { | |
725 | *p++ = xdr_two; | |
726 | p = xdr_encode_nfstime3(p, &attr->ia_atime); | |
727 | } else if (attr->ia_valid & ATTR_ATIME) { | |
728 | *p++ = xdr_one; | |
729 | } else | |
730 | *p++ = xdr_zero; | |
731 | ||
732 | if (attr->ia_valid & ATTR_MTIME_SET) { | |
733 | *p++ = xdr_two; | |
734 | xdr_encode_nfstime3(p, &attr->ia_mtime); | |
735 | } else if (attr->ia_valid & ATTR_MTIME) { | |
736 | *p = xdr_one; | |
737 | } else | |
738 | *p = xdr_zero; | |
d9c407b1 CL |
739 | } |
740 | ||
e4f93234 CL |
741 | /* |
742 | * fattr3 | |
743 | * | |
744 | * struct fattr3 { | |
745 | * ftype3 type; | |
746 | * mode3 mode; | |
747 | * uint32 nlink; | |
748 | * uid3 uid; | |
749 | * gid3 gid; | |
750 | * size3 size; | |
751 | * size3 used; | |
752 | * specdata3 rdev; | |
753 | * uint64 fsid; | |
754 | * fileid3 fileid; | |
755 | * nfstime3 atime; | |
756 | * nfstime3 mtime; | |
757 | * nfstime3 ctime; | |
758 | * }; | |
759 | */ | |
760 | static int decode_fattr3(struct xdr_stream *xdr, struct nfs_fattr *fattr) | |
761 | { | |
762 | __be32 *p; | |
763 | ||
764 | p = xdr_inline_decode(xdr, NFS3_fattr_sz << 2); | |
765 | if (unlikely(p == NULL)) | |
766 | goto out_overflow; | |
767 | xdr_decode_fattr(p, fattr); | |
768 | return 0; | |
769 | out_overflow: | |
770 | print_overflow_msg(__func__, xdr); | |
771 | return -EIO; | |
772 | } | |
773 | ||
774 | /* | |
775 | * post_op_attr | |
776 | * | |
777 | * union post_op_attr switch (bool attributes_follow) { | |
778 | * case TRUE: | |
779 | * fattr3 attributes; | |
780 | * case FALSE: | |
781 | * void; | |
782 | * }; | |
783 | */ | |
784 | static int decode_post_op_attr(struct xdr_stream *xdr, struct nfs_fattr *fattr) | |
785 | { | |
786 | __be32 *p; | |
787 | ||
788 | p = xdr_inline_decode(xdr, 4); | |
789 | if (unlikely(p == NULL)) | |
790 | goto out_overflow; | |
791 | if (*p != xdr_zero) | |
792 | return decode_fattr3(xdr, fattr); | |
793 | return 0; | |
794 | out_overflow: | |
795 | print_overflow_msg(__func__, xdr); | |
796 | return -EIO; | |
797 | } | |
798 | ||
799 | /* | |
800 | * wcc_attr | |
801 | * struct wcc_attr { | |
802 | * size3 size; | |
803 | * nfstime3 mtime; | |
804 | * nfstime3 ctime; | |
805 | * }; | |
806 | */ | |
807 | static int decode_wcc_attr(struct xdr_stream *xdr, struct nfs_fattr *fattr) | |
808 | { | |
809 | __be32 *p; | |
810 | ||
811 | p = xdr_inline_decode(xdr, NFS3_wcc_attr_sz << 2); | |
812 | if (unlikely(p == NULL)) | |
813 | goto out_overflow; | |
814 | xdr_decode_wcc_attr(p, fattr); | |
815 | return 0; | |
816 | out_overflow: | |
817 | print_overflow_msg(__func__, xdr); | |
818 | return -EIO; | |
819 | } | |
820 | ||
821 | /* | |
822 | * pre_op_attr | |
823 | * union pre_op_attr switch (bool attributes_follow) { | |
824 | * case TRUE: | |
825 | * wcc_attr attributes; | |
826 | * case FALSE: | |
827 | * void; | |
828 | * }; | |
829 | * | |
830 | * wcc_data | |
831 | * | |
832 | * struct wcc_data { | |
833 | * pre_op_attr before; | |
834 | * post_op_attr after; | |
835 | * }; | |
836 | */ | |
837 | static int decode_pre_op_attr(struct xdr_stream *xdr, struct nfs_fattr *fattr) | |
838 | { | |
839 | __be32 *p; | |
840 | ||
841 | p = xdr_inline_decode(xdr, 4); | |
842 | if (unlikely(p == NULL)) | |
843 | goto out_overflow; | |
844 | if (*p != xdr_zero) | |
845 | return decode_wcc_attr(xdr, fattr); | |
846 | return 0; | |
847 | out_overflow: | |
848 | print_overflow_msg(__func__, xdr); | |
849 | return -EIO; | |
850 | } | |
851 | ||
852 | static int decode_wcc_data(struct xdr_stream *xdr, struct nfs_fattr *fattr) | |
853 | { | |
854 | int error; | |
855 | ||
856 | error = decode_pre_op_attr(xdr, fattr); | |
857 | if (unlikely(error)) | |
858 | goto out; | |
859 | error = decode_post_op_attr(xdr, fattr); | |
860 | out: | |
861 | return error; | |
862 | } | |
863 | ||
864 | /* | |
865 | * post_op_fh3 | |
866 | * | |
867 | * union post_op_fh3 switch (bool handle_follows) { | |
868 | * case TRUE: | |
869 | * nfs_fh3 handle; | |
870 | * case FALSE: | |
871 | * void; | |
872 | * }; | |
873 | */ | |
874 | static int decode_post_op_fh3(struct xdr_stream *xdr, struct nfs_fh *fh) | |
875 | { | |
876 | __be32 *p = xdr_inline_decode(xdr, 4); | |
877 | if (unlikely(p == NULL)) | |
878 | goto out_overflow; | |
879 | if (*p != xdr_zero) | |
880 | return decode_nfs_fh3(xdr, fh); | |
881 | zero_nfs_fh3(fh); | |
882 | return 0; | |
883 | out_overflow: | |
884 | print_overflow_msg(__func__, xdr); | |
885 | return -EIO; | |
886 | } | |
887 | ||
d9c407b1 CL |
888 | /* |
889 | * diropargs3 | |
890 | * | |
891 | * struct diropargs3 { | |
892 | * nfs_fh3 dir; | |
893 | * filename3 name; | |
894 | * }; | |
895 | */ | |
896 | static void encode_diropargs3(struct xdr_stream *xdr, const struct nfs_fh *fh, | |
897 | const char *name, u32 length) | |
898 | { | |
899 | encode_nfs_fh3(xdr, fh); | |
900 | encode_filename3(xdr, name, length); | |
901 | } | |
902 | ||
903 | ||
1da177e4 | 904 | /* |
499ff710 CL |
905 | * NFSv3 XDR encode functions |
906 | * | |
907 | * NFSv3 argument types are defined in section 3.3 of RFC 1813: | |
908 | * "NFS Version 3 Protocol Specification". | |
1da177e4 LT |
909 | */ |
910 | ||
d9c407b1 CL |
911 | /* |
912 | * 3.3.1 GETATTR3args | |
913 | * | |
914 | * struct GETATTR3args { | |
915 | * nfs_fh3 object; | |
916 | * }; | |
917 | */ | |
918 | static int nfs3_xdr_enc_getattr3args(struct rpc_rqst *req, __be32 *p, | |
919 | const struct nfs_fh *fh) | |
920 | { | |
921 | struct xdr_stream xdr; | |
922 | ||
923 | xdr_init_encode(&xdr, &req->rq_snd_buf, p); | |
924 | encode_nfs_fh3(&xdr, fh); | |
925 | return 0; | |
926 | } | |
927 | ||
d9c407b1 CL |
928 | /* |
929 | * 3.3.2 SETATTR3args | |
930 | * | |
931 | * union sattrguard3 switch (bool check) { | |
932 | * case TRUE: | |
933 | * nfstime3 obj_ctime; | |
934 | * case FALSE: | |
935 | * void; | |
936 | * }; | |
937 | * | |
938 | * struct SETATTR3args { | |
939 | * nfs_fh3 object; | |
940 | * sattr3 new_attributes; | |
941 | * sattrguard3 guard; | |
942 | * }; | |
943 | */ | |
944 | static void encode_sattrguard3(struct xdr_stream *xdr, | |
945 | const struct nfs3_sattrargs *args) | |
946 | { | |
947 | __be32 *p; | |
948 | ||
949 | if (args->guard) { | |
950 | p = xdr_reserve_space(xdr, 4 + 8); | |
951 | *p++ = xdr_one; | |
9d5a6434 | 952 | xdr_encode_nfstime3(p, &args->guardtime); |
d9c407b1 CL |
953 | } else { |
954 | p = xdr_reserve_space(xdr, 4); | |
955 | *p = xdr_zero; | |
956 | } | |
957 | } | |
958 | ||
959 | static int nfs3_xdr_enc_setattr3args(struct rpc_rqst *req, __be32 *p, | |
960 | const struct nfs3_sattrargs *args) | |
961 | { | |
962 | struct xdr_stream xdr; | |
963 | ||
964 | xdr_init_encode(&xdr, &req->rq_snd_buf, p); | |
965 | encode_nfs_fh3(&xdr, args->fh); | |
966 | encode_sattr3(&xdr, args->sattr); | |
967 | encode_sattrguard3(&xdr, args); | |
968 | return 0; | |
969 | } | |
970 | ||
d9c407b1 CL |
971 | /* |
972 | * 3.3.3 LOOKUP3args | |
973 | * | |
974 | * struct LOOKUP3args { | |
975 | * diropargs3 what; | |
976 | * }; | |
977 | */ | |
978 | static int nfs3_xdr_enc_lookup3args(struct rpc_rqst *req, __be32 *p, | |
979 | const struct nfs3_diropargs *args) | |
980 | { | |
981 | struct xdr_stream xdr; | |
982 | ||
983 | xdr_init_encode(&xdr, &req->rq_snd_buf, p); | |
984 | encode_diropargs3(&xdr, args->fh, args->name, args->len); | |
985 | return 0; | |
986 | } | |
987 | ||
d9c407b1 CL |
988 | /* |
989 | * 3.3.4 ACCESS3args | |
990 | * | |
991 | * struct ACCESS3args { | |
992 | * nfs_fh3 object; | |
993 | * uint32 access; | |
994 | * }; | |
995 | */ | |
996 | static void encode_access3args(struct xdr_stream *xdr, | |
997 | const struct nfs3_accessargs *args) | |
998 | { | |
999 | encode_nfs_fh3(xdr, args->fh); | |
1000 | encode_uint32(xdr, args->access); | |
1001 | } | |
1002 | ||
1003 | static int nfs3_xdr_enc_access3args(struct rpc_rqst *req, __be32 *p, | |
1004 | const struct nfs3_accessargs *args) | |
1005 | { | |
1006 | struct xdr_stream xdr; | |
1007 | ||
1008 | xdr_init_encode(&xdr, &req->rq_snd_buf, p); | |
1009 | encode_access3args(&xdr, args); | |
1010 | return 0; | |
1011 | } | |
1012 | ||
1013 | /* | |
1014 | * 3.3.5 READLINK3args | |
1015 | * | |
1016 | * struct READLINK3args { | |
1017 | * nfs_fh3 symlink; | |
1018 | * }; | |
1019 | */ | |
1020 | static int nfs3_xdr_enc_readlink3args(struct rpc_rqst *req, __be32 *p, | |
1021 | const struct nfs3_readlinkargs *args) | |
1022 | { | |
1023 | struct xdr_stream xdr; | |
1024 | ||
1025 | xdr_init_encode(&xdr, &req->rq_snd_buf, p); | |
1026 | encode_nfs_fh3(&xdr, args->fh); | |
1027 | prepare_reply_buffer(req, args->pages, args->pgbase, | |
1028 | args->pglen, NFS3_readlinkres_sz); | |
1029 | return 0; | |
1030 | } | |
1031 | ||
d9c407b1 CL |
1032 | /* |
1033 | * 3.3.6 READ3args | |
1034 | * | |
1035 | * struct READ3args { | |
1036 | * nfs_fh3 file; | |
1037 | * offset3 offset; | |
1038 | * count3 count; | |
1039 | * }; | |
1040 | */ | |
1041 | static void encode_read3args(struct xdr_stream *xdr, | |
1042 | const struct nfs_readargs *args) | |
1043 | { | |
1044 | __be32 *p; | |
1045 | ||
1046 | encode_nfs_fh3(xdr, args->fh); | |
1047 | ||
1048 | p = xdr_reserve_space(xdr, 8 + 4); | |
1049 | p = xdr_encode_hyper(p, args->offset); | |
1050 | *p = cpu_to_be32(args->count); | |
1051 | } | |
1052 | ||
1053 | static int nfs3_xdr_enc_read3args(struct rpc_rqst *req, __be32 *p, | |
1054 | const struct nfs_readargs *args) | |
1055 | { | |
1056 | struct xdr_stream xdr; | |
1057 | ||
1058 | xdr_init_encode(&xdr, &req->rq_snd_buf, p); | |
1059 | encode_read3args(&xdr, args); | |
1060 | prepare_reply_buffer(req, args->pages, args->pgbase, | |
1061 | args->count, NFS3_readres_sz); | |
1062 | req->rq_rcv_buf.flags |= XDRBUF_READ; | |
1063 | return 0; | |
1064 | } | |
1065 | ||
d9c407b1 CL |
1066 | /* |
1067 | * 3.3.7 WRITE3args | |
1068 | * | |
1069 | * enum stable_how { | |
1070 | * UNSTABLE = 0, | |
1071 | * DATA_SYNC = 1, | |
1072 | * FILE_SYNC = 2 | |
1073 | * }; | |
1074 | * | |
1075 | * struct WRITE3args { | |
1076 | * nfs_fh3 file; | |
1077 | * offset3 offset; | |
1078 | * count3 count; | |
1079 | * stable_how stable; | |
1080 | * opaque data<>; | |
1081 | * }; | |
1082 | */ | |
1083 | static void encode_write3args(struct xdr_stream *xdr, | |
1084 | const struct nfs_writeargs *args) | |
1085 | { | |
1086 | __be32 *p; | |
1087 | ||
1088 | encode_nfs_fh3(xdr, args->fh); | |
1089 | ||
1090 | p = xdr_reserve_space(xdr, 8 + 4 + 4 + 4); | |
1091 | p = xdr_encode_hyper(p, args->offset); | |
1092 | *p++ = cpu_to_be32(args->count); | |
1093 | ||
1094 | BUG_ON(args->stable > NFS_FILE_SYNC); | |
1095 | *p++ = cpu_to_be32(args->stable); | |
1096 | ||
1097 | *p = cpu_to_be32(args->count); | |
1098 | xdr_write_pages(xdr, args->pages, args->pgbase, args->count); | |
1099 | } | |
1100 | ||
1101 | static int nfs3_xdr_enc_write3args(struct rpc_rqst *req, __be32 *p, | |
1102 | const struct nfs_writeargs *args) | |
1103 | { | |
1104 | struct xdr_stream xdr; | |
1105 | ||
1106 | xdr_init_encode(&xdr, &req->rq_snd_buf, p); | |
1107 | encode_write3args(&xdr, args); | |
1108 | xdr.buf->flags |= XDRBUF_WRITE; | |
1109 | return 0; | |
1110 | } | |
1111 | ||
d9c407b1 CL |
1112 | /* |
1113 | * 3.3.8 CREATE3args | |
1114 | * | |
1115 | * enum createmode3 { | |
1116 | * UNCHECKED = 0, | |
1117 | * GUARDED = 1, | |
1118 | * EXCLUSIVE = 2 | |
1119 | * }; | |
1120 | * | |
1121 | * union createhow3 switch (createmode3 mode) { | |
1122 | * case UNCHECKED: | |
1123 | * case GUARDED: | |
1124 | * sattr3 obj_attributes; | |
1125 | * case EXCLUSIVE: | |
1126 | * createverf3 verf; | |
1127 | * }; | |
1128 | * | |
1129 | * struct CREATE3args { | |
1130 | * diropargs3 where; | |
1131 | * createhow3 how; | |
1132 | * }; | |
1133 | */ | |
1134 | static void encode_createhow3(struct xdr_stream *xdr, | |
1135 | const struct nfs3_createargs *args) | |
1136 | { | |
1137 | encode_uint32(xdr, args->createmode); | |
1138 | switch (args->createmode) { | |
1139 | case NFS3_CREATE_UNCHECKED: | |
1140 | case NFS3_CREATE_GUARDED: | |
1141 | encode_sattr3(xdr, args->sattr); | |
1142 | break; | |
1143 | case NFS3_CREATE_EXCLUSIVE: | |
1144 | encode_createverf3(xdr, args->verifier); | |
1145 | break; | |
1146 | default: | |
1147 | BUG(); | |
1148 | } | |
1149 | } | |
1150 | ||
1151 | static int nfs3_xdr_enc_create3args(struct rpc_rqst *req, __be32 *p, | |
1152 | const struct nfs3_createargs *args) | |
1153 | { | |
1154 | struct xdr_stream xdr; | |
1155 | ||
1156 | xdr_init_encode(&xdr, &req->rq_snd_buf, p); | |
1157 | encode_diropargs3(&xdr, args->fh, args->name, args->len); | |
1158 | encode_createhow3(&xdr, args); | |
1159 | return 0; | |
1160 | } | |
1161 | ||
d9c407b1 CL |
1162 | /* |
1163 | * 3.3.9 MKDIR3args | |
1164 | * | |
1165 | * struct MKDIR3args { | |
1166 | * diropargs3 where; | |
1167 | * sattr3 attributes; | |
1168 | * }; | |
1169 | */ | |
1170 | static int nfs3_xdr_enc_mkdir3args(struct rpc_rqst *req, __be32 *p, | |
1171 | const struct nfs3_mkdirargs *args) | |
1172 | { | |
1173 | struct xdr_stream xdr; | |
1174 | ||
1175 | xdr_init_encode(&xdr, &req->rq_snd_buf, p); | |
1176 | encode_diropargs3(&xdr, args->fh, args->name, args->len); | |
1177 | encode_sattr3(&xdr, args->sattr); | |
1178 | return 0; | |
1179 | } | |
1180 | ||
d9c407b1 CL |
1181 | /* |
1182 | * 3.3.10 SYMLINK3args | |
1183 | * | |
1184 | * struct symlinkdata3 { | |
1185 | * sattr3 symlink_attributes; | |
1186 | * nfspath3 symlink_data; | |
1187 | * }; | |
1188 | * | |
1189 | * struct SYMLINK3args { | |
1190 | * diropargs3 where; | |
1191 | * symlinkdata3 symlink; | |
1192 | * }; | |
1193 | */ | |
1194 | static void encode_symlinkdata3(struct xdr_stream *xdr, | |
1195 | const struct nfs3_symlinkargs *args) | |
1196 | { | |
1197 | encode_sattr3(xdr, args->sattr); | |
1198 | encode_nfspath3(xdr, args->pages, args->pathlen); | |
1199 | } | |
1200 | ||
1201 | static int nfs3_xdr_enc_symlink3args(struct rpc_rqst *req, __be32 *p, | |
1202 | const struct nfs3_symlinkargs *args) | |
1203 | { | |
1204 | struct xdr_stream xdr; | |
1205 | ||
1206 | xdr_init_encode(&xdr, &req->rq_snd_buf, p); | |
1207 | encode_diropargs3(&xdr, args->fromfh, args->fromname, args->fromlen); | |
1208 | encode_symlinkdata3(&xdr, args); | |
1209 | return 0; | |
1210 | } | |
1211 | ||
d9c407b1 CL |
1212 | /* |
1213 | * 3.3.11 MKNOD3args | |
1214 | * | |
1215 | * struct devicedata3 { | |
1216 | * sattr3 dev_attributes; | |
1217 | * specdata3 spec; | |
1218 | * }; | |
1219 | * | |
1220 | * union mknoddata3 switch (ftype3 type) { | |
1221 | * case NF3CHR: | |
1222 | * case NF3BLK: | |
1223 | * devicedata3 device; | |
1224 | * case NF3SOCK: | |
1225 | * case NF3FIFO: | |
1226 | * sattr3 pipe_attributes; | |
1227 | * default: | |
1228 | * void; | |
1229 | * }; | |
1230 | * | |
1231 | * struct MKNOD3args { | |
1232 | * diropargs3 where; | |
1233 | * mknoddata3 what; | |
1234 | * }; | |
1235 | */ | |
1236 | static void encode_devicedata3(struct xdr_stream *xdr, | |
1237 | const struct nfs3_mknodargs *args) | |
1238 | { | |
1239 | encode_sattr3(xdr, args->sattr); | |
1240 | encode_specdata3(xdr, args->rdev); | |
1241 | } | |
1242 | ||
1243 | static void encode_mknoddata3(struct xdr_stream *xdr, | |
1244 | const struct nfs3_mknodargs *args) | |
1245 | { | |
1246 | encode_ftype3(xdr, args->type); | |
1247 | switch (args->type) { | |
1248 | case NF3CHR: | |
1249 | case NF3BLK: | |
1250 | encode_devicedata3(xdr, args); | |
1251 | break; | |
1252 | case NF3SOCK: | |
1253 | case NF3FIFO: | |
1254 | encode_sattr3(xdr, args->sattr); | |
1255 | break; | |
1256 | case NF3REG: | |
1257 | case NF3DIR: | |
1258 | break; | |
1259 | default: | |
1260 | BUG(); | |
1261 | } | |
1262 | } | |
1263 | ||
1264 | static int nfs3_xdr_enc_mknod3args(struct rpc_rqst *req, __be32 *p, | |
1265 | const struct nfs3_mknodargs *args) | |
1266 | { | |
1267 | struct xdr_stream xdr; | |
1268 | ||
1269 | xdr_init_encode(&xdr, &req->rq_snd_buf, p); | |
1270 | encode_diropargs3(&xdr, args->fh, args->name, args->len); | |
1271 | encode_mknoddata3(&xdr, args); | |
1272 | return 0; | |
1273 | } | |
1274 | ||
1275 | /* | |
1276 | * 3.3.12 REMOVE3args | |
1277 | * | |
1278 | * struct REMOVE3args { | |
1279 | * diropargs3 object; | |
1280 | * }; | |
1281 | */ | |
1282 | static int nfs3_xdr_enc_remove3args(struct rpc_rqst *req, __be32 *p, | |
1283 | const struct nfs_removeargs *args) | |
1284 | { | |
1285 | struct xdr_stream xdr; | |
1286 | ||
1287 | xdr_init_encode(&xdr, &req->rq_snd_buf, p); | |
1288 | encode_diropargs3(&xdr, args->fh, args->name.name, args->name.len); | |
1289 | return 0; | |
1290 | } | |
1291 | ||
d9c407b1 CL |
1292 | /* |
1293 | * 3.3.14 RENAME3args | |
1294 | * | |
1295 | * struct RENAME3args { | |
1296 | * diropargs3 from; | |
1297 | * diropargs3 to; | |
1298 | * }; | |
1299 | */ | |
1300 | static int nfs3_xdr_enc_rename3args(struct rpc_rqst *req, __be32 *p, | |
1301 | const struct nfs_renameargs *args) | |
1302 | { | |
1303 | const struct qstr *old = args->old_name; | |
1304 | const struct qstr *new = args->new_name; | |
1305 | struct xdr_stream xdr; | |
1306 | ||
1307 | xdr_init_encode(&xdr, &req->rq_snd_buf, p); | |
1308 | encode_diropargs3(&xdr, args->old_dir, old->name, old->len); | |
1309 | encode_diropargs3(&xdr, args->new_dir, new->name, new->len); | |
1310 | return 0; | |
1311 | } | |
1312 | ||
d9c407b1 CL |
1313 | /* |
1314 | * 3.3.15 LINK3args | |
1315 | * | |
1316 | * struct LINK3args { | |
1317 | * nfs_fh3 file; | |
1318 | * diropargs3 link; | |
1319 | * }; | |
1320 | */ | |
1321 | static int nfs3_xdr_enc_link3args(struct rpc_rqst *req, __be32 *p, | |
1322 | const struct nfs3_linkargs *args) | |
1323 | { | |
1324 | struct xdr_stream xdr; | |
1325 | ||
1326 | xdr_init_encode(&xdr, &req->rq_snd_buf, p); | |
1327 | encode_nfs_fh3(&xdr, args->fromfh); | |
1328 | encode_diropargs3(&xdr, args->tofh, args->toname, args->tolen); | |
1329 | return 0; | |
1330 | } | |
1331 | ||
d9c407b1 CL |
1332 | /* |
1333 | * 3.3.16 READDIR3args | |
1334 | * | |
1335 | * struct READDIR3args { | |
1336 | * nfs_fh3 dir; | |
1337 | * cookie3 cookie; | |
1338 | * cookieverf3 cookieverf; | |
1339 | * count3 count; | |
1340 | * }; | |
1341 | */ | |
1342 | static void encode_readdir3args(struct xdr_stream *xdr, | |
1343 | const struct nfs3_readdirargs *args) | |
1344 | { | |
1345 | __be32 *p; | |
1346 | ||
1347 | encode_nfs_fh3(xdr, args->fh); | |
1348 | ||
1349 | p = xdr_reserve_space(xdr, 8 + NFS3_COOKIEVERFSIZE + 4); | |
1350 | p = xdr_encode_cookie3(p, args->cookie); | |
1351 | p = xdr_encode_cookieverf3(p, args->verf); | |
1352 | *p = cpu_to_be32(args->count); | |
1353 | } | |
1354 | ||
1355 | static int nfs3_xdr_enc_readdir3args(struct rpc_rqst *req, __be32 *p, | |
1356 | const struct nfs3_readdirargs *args) | |
1357 | { | |
1358 | struct xdr_stream xdr; | |
1359 | ||
1360 | xdr_init_encode(&xdr, &req->rq_snd_buf, p); | |
1361 | encode_readdir3args(&xdr, args); | |
1362 | prepare_reply_buffer(req, args->pages, 0, | |
1363 | args->count, NFS3_readdirres_sz); | |
1364 | return 0; | |
1365 | } | |
1366 | ||
1367 | /* | |
1368 | * 3.3.17 READDIRPLUS3args | |
1369 | * | |
1370 | * struct READDIRPLUS3args { | |
1371 | * nfs_fh3 dir; | |
1372 | * cookie3 cookie; | |
1373 | * cookieverf3 cookieverf; | |
1374 | * count3 dircount; | |
1375 | * count3 maxcount; | |
1376 | * }; | |
1377 | */ | |
1378 | static void encode_readdirplus3args(struct xdr_stream *xdr, | |
1379 | const struct nfs3_readdirargs *args) | |
1380 | { | |
1381 | __be32 *p; | |
1382 | ||
1383 | encode_nfs_fh3(xdr, args->fh); | |
1384 | ||
1385 | p = xdr_reserve_space(xdr, 8 + NFS3_COOKIEVERFSIZE + 4 + 4); | |
1386 | p = xdr_encode_cookie3(p, args->cookie); | |
1387 | p = xdr_encode_cookieverf3(p, args->verf); | |
1388 | ||
1389 | /* | |
1390 | * readdirplus: need dircount + buffer size. | |
1391 | * We just make sure we make dircount big enough | |
1392 | */ | |
1393 | *p++ = cpu_to_be32(args->count >> 3); | |
1394 | ||
1395 | *p = cpu_to_be32(args->count); | |
1396 | } | |
1397 | ||
1398 | static int nfs3_xdr_enc_readdirplus3args(struct rpc_rqst *req, __be32 *p, | |
1399 | const struct nfs3_readdirargs *args) | |
1400 | { | |
1401 | struct xdr_stream xdr; | |
1402 | ||
1403 | xdr_init_encode(&xdr, &req->rq_snd_buf, p); | |
1404 | encode_readdirplus3args(&xdr, args); | |
1405 | prepare_reply_buffer(req, args->pages, 0, | |
1406 | args->count, NFS3_readdirres_sz); | |
1407 | return 0; | |
1408 | } | |
1409 | ||
1da177e4 LT |
1410 | /* |
1411 | * Decode the result of a readdir call. | |
1412 | * We just check for syntactical correctness. | |
1413 | */ | |
1414 | static int | |
d61005a6 | 1415 | nfs3_xdr_readdirres(struct rpc_rqst *req, __be32 *p, struct nfs3_readdirres *res) |
1da177e4 LT |
1416 | { |
1417 | struct xdr_buf *rcvbuf = &req->rq_rcv_buf; | |
1418 | struct kvec *iov = rcvbuf->head; | |
1419 | struct page **page; | |
c957c526 | 1420 | size_t hdrlen; |
afa8ccc9 | 1421 | u32 recvd, pglen; |
ac396128 | 1422 | int status; |
1da177e4 LT |
1423 | |
1424 | status = ntohl(*p++); | |
1425 | /* Decode post_op_attrs */ | |
1426 | p = xdr_decode_post_op_attr(p, res->dir_attr); | |
1427 | if (status) | |
856dff3d | 1428 | return nfs_stat_to_errno(status); |
1da177e4 LT |
1429 | /* Decode verifier cookie */ |
1430 | if (res->verf) { | |
1431 | res->verf[0] = *p++; | |
1432 | res->verf[1] = *p++; | |
1433 | } else { | |
1434 | p += 2; | |
1435 | } | |
1436 | ||
1437 | hdrlen = (u8 *) p - (u8 *) iov->iov_base; | |
1438 | if (iov->iov_len < hdrlen) { | |
fe82a183 | 1439 | dprintk("NFS: READDIR reply header overflowed:" |
c957c526 | 1440 | "length %Zu > %Zu\n", hdrlen, iov->iov_len); |
1da177e4 LT |
1441 | return -errno_NFSERR_IO; |
1442 | } else if (iov->iov_len != hdrlen) { | |
1443 | dprintk("NFS: READDIR header is short. iovec will be shifted.\n"); | |
1444 | xdr_shift_buf(rcvbuf, iov->iov_len - hdrlen); | |
1445 | } | |
1446 | ||
1447 | pglen = rcvbuf->page_len; | |
1448 | recvd = rcvbuf->len - hdrlen; | |
1449 | if (pglen > recvd) | |
1450 | pglen = recvd; | |
1451 | page = rcvbuf->pages; | |
643f8111 | 1452 | |
ac396128 | 1453 | return pglen; |
1da177e4 LT |
1454 | } |
1455 | ||
d9c407b1 CL |
1456 | /* |
1457 | * 3.3.21 COMMIT3args | |
1458 | * | |
1459 | * struct COMMIT3args { | |
1460 | * nfs_fh3 file; | |
1461 | * offset3 offset; | |
1462 | * count3 count; | |
1463 | * }; | |
1464 | */ | |
1465 | static void encode_commit3args(struct xdr_stream *xdr, | |
1466 | const struct nfs_writeargs *args) | |
1467 | { | |
1468 | __be32 *p; | |
1469 | ||
1470 | encode_nfs_fh3(xdr, args->fh); | |
1471 | ||
1472 | p = xdr_reserve_space(xdr, 8 + 4); | |
1473 | p = xdr_encode_hyper(p, args->offset); | |
1474 | *p = cpu_to_be32(args->count); | |
1475 | } | |
1476 | ||
1477 | static int nfs3_xdr_enc_commit3args(struct rpc_rqst *req, __be32 *p, | |
1478 | const struct nfs_writeargs *args) | |
1479 | { | |
1480 | struct xdr_stream xdr; | |
1481 | ||
1482 | xdr_init_encode(&xdr, &req->rq_snd_buf, p); | |
1483 | encode_commit3args(&xdr, args); | |
1484 | return 0; | |
1485 | } | |
1486 | ||
b7fa0554 | 1487 | #ifdef CONFIG_NFS_V3_ACL |
b7fa0554 | 1488 | |
d9c407b1 CL |
1489 | static int nfs3_xdr_enc_getacl3args(struct rpc_rqst *req, __be32 *p, |
1490 | const struct nfs3_getaclargs *args) | |
1491 | { | |
1492 | struct xdr_stream xdr; | |
1493 | ||
1494 | xdr_init_encode(&xdr, &req->rq_snd_buf, p); | |
1495 | encode_nfs_fh3(&xdr, args->fh); | |
1496 | encode_uint32(&xdr, args->mask); | |
1497 | if (args->mask & (NFS_ACL | NFS_DFACL)) | |
1498 | prepare_reply_buffer(req, args->pages, 0, | |
1499 | NFSACL_MAXPAGES << PAGE_SHIFT, | |
1500 | ACL3_getaclres_sz); | |
1501 | return 0; | |
1502 | } | |
1503 | ||
d9c407b1 CL |
1504 | static int nfs3_xdr_enc_setacl3args(struct rpc_rqst *req, __be32 *p, |
1505 | const struct nfs3_setaclargs *args) | |
1506 | { | |
1507 | struct xdr_stream xdr; | |
1508 | unsigned int base; | |
1509 | int error; | |
1510 | ||
1511 | xdr_init_encode(&xdr, &req->rq_snd_buf, p); | |
1512 | encode_nfs_fh3(&xdr, NFS_FH(args->inode)); | |
1513 | encode_uint32(&xdr, args->mask); | |
1514 | if (args->npages != 0) | |
1515 | xdr_write_pages(&xdr, args->pages, 0, args->len); | |
1516 | ||
1517 | base = req->rq_slen; | |
1518 | error = nfsacl_encode(xdr.buf, base, args->inode, | |
1519 | (args->mask & NFS_ACL) ? | |
1520 | args->acl_access : NULL, 1, 0); | |
1521 | BUG_ON(error < 0); | |
1522 | error = nfsacl_encode(xdr.buf, base + error, args->inode, | |
1523 | (args->mask & NFS_DFACL) ? | |
1524 | args->acl_default : NULL, 1, | |
1525 | NFS_ACL_DEFAULT); | |
1526 | BUG_ON(error < 0); | |
1527 | return 0; | |
1528 | } | |
1529 | ||
b7fa0554 AG |
1530 | #endif /* CONFIG_NFS_V3_ACL */ |
1531 | ||
1da177e4 LT |
1532 | /* |
1533 | * NFS XDR decode functions | |
1534 | */ | |
1535 | ||
1536 | /* | |
1537 | * Decode attrstat reply. | |
1538 | */ | |
1539 | static int | |
d61005a6 | 1540 | nfs3_xdr_attrstat(struct rpc_rqst *req, __be32 *p, struct nfs_fattr *fattr) |
1da177e4 LT |
1541 | { |
1542 | int status; | |
1543 | ||
1544 | if ((status = ntohl(*p++))) | |
856dff3d | 1545 | return nfs_stat_to_errno(status); |
1da177e4 LT |
1546 | xdr_decode_fattr(p, fattr); |
1547 | return 0; | |
1548 | } | |
1549 | ||
1550 | /* | |
e4f93234 CL |
1551 | * 3.3.1 GETATTR3res |
1552 | * | |
1553 | * struct GETATTR3resok { | |
1554 | * fattr3 obj_attributes; | |
1555 | * }; | |
1556 | * | |
1557 | * union GETATTR3res switch (nfsstat3 status) { | |
1558 | * case NFS3_OK: | |
1559 | * GETATTR3resok resok; | |
1560 | * default: | |
1561 | * void; | |
1562 | * }; | |
1da177e4 | 1563 | */ |
e4f93234 CL |
1564 | static int nfs3_xdr_dec_getattr3res(struct rpc_rqst *req, __be32 *p, |
1565 | struct nfs_fattr *result) | |
1da177e4 | 1566 | { |
e4f93234 CL |
1567 | struct xdr_stream xdr; |
1568 | enum nfs_stat status; | |
1569 | int error; | |
1570 | ||
1571 | xdr_init_decode(&xdr, &req->rq_rcv_buf, p); | |
1572 | error = decode_nfsstat3(&xdr, &status); | |
1573 | if (unlikely(error)) | |
1574 | goto out; | |
1575 | if (status != NFS3_OK) | |
1576 | goto out_default; | |
1577 | error = decode_fattr3(&xdr, result); | |
1578 | out: | |
1579 | return error; | |
1580 | out_default: | |
1581 | return nfs_stat_to_errno(status); | |
1582 | } | |
1583 | ||
1584 | /* | |
1585 | * Decode status+wcc_data reply | |
1586 | * SATTR, REMOVE, RMDIR | |
1587 | */ | |
1588 | static int | |
1589 | nfs3_xdr_wccstat(struct rpc_rqst *req, __be32 *p, struct nfs_fattr *fattr) | |
1590 | { | |
1591 | int status; | |
1da177e4 LT |
1592 | |
1593 | if ((status = ntohl(*p++))) | |
856dff3d | 1594 | status = nfs_stat_to_errno(status); |
1da177e4 LT |
1595 | xdr_decode_wcc_data(p, fattr); |
1596 | return status; | |
1597 | } | |
1598 | ||
e4f93234 CL |
1599 | /* |
1600 | * 3.3.2 SETATTR3res | |
1601 | * | |
1602 | * struct SETATTR3resok { | |
1603 | * wcc_data obj_wcc; | |
1604 | * }; | |
1605 | * | |
1606 | * struct SETATTR3resfail { | |
1607 | * wcc_data obj_wcc; | |
1608 | * }; | |
1609 | * | |
1610 | * union SETATTR3res switch (nfsstat3 status) { | |
1611 | * case NFS3_OK: | |
1612 | * SETATTR3resok resok; | |
1613 | * default: | |
1614 | * SETATTR3resfail resfail; | |
1615 | * }; | |
1616 | */ | |
1617 | static int nfs3_xdr_dec_setattr3res(struct rpc_rqst *req, __be32 *p, | |
1618 | struct nfs_fattr *result) | |
1619 | { | |
1620 | struct xdr_stream xdr; | |
1621 | enum nfs_stat status; | |
1622 | int error; | |
1623 | ||
1624 | xdr_init_decode(&xdr, &req->rq_rcv_buf, p); | |
1625 | error = decode_nfsstat3(&xdr, &status); | |
1626 | if (unlikely(error)) | |
1627 | goto out; | |
1628 | error = decode_wcc_data(&xdr, result); | |
1629 | if (unlikely(error)) | |
1630 | goto out; | |
1631 | if (status != NFS3_OK) | |
1632 | goto out_status; | |
1633 | out: | |
1634 | return error; | |
1635 | out_status: | |
1636 | return nfs_stat_to_errno(status); | |
1637 | } | |
1638 | ||
4fdc17b2 TM |
1639 | static int |
1640 | nfs3_xdr_removeres(struct rpc_rqst *req, __be32 *p, struct nfs_removeres *res) | |
1641 | { | |
d346890b | 1642 | return nfs3_xdr_wccstat(req, p, res->dir_attr); |
4fdc17b2 TM |
1643 | } |
1644 | ||
1da177e4 LT |
1645 | /* |
1646 | * Decode LOOKUP reply | |
1647 | */ | |
1648 | static int | |
d61005a6 | 1649 | nfs3_xdr_lookupres(struct rpc_rqst *req, __be32 *p, struct nfs3_diropres *res) |
1da177e4 LT |
1650 | { |
1651 | int status; | |
1652 | ||
1653 | if ((status = ntohl(*p++))) { | |
856dff3d | 1654 | status = nfs_stat_to_errno(status); |
1da177e4 LT |
1655 | } else { |
1656 | if (!(p = xdr_decode_fhandle(p, res->fh))) | |
1657 | return -errno_NFSERR_IO; | |
1658 | p = xdr_decode_post_op_attr(p, res->fattr); | |
1659 | } | |
1660 | xdr_decode_post_op_attr(p, res->dir_attr); | |
1661 | return status; | |
1662 | } | |
1663 | ||
e4f93234 CL |
1664 | /* |
1665 | * 3.3.3 LOOKUP3res | |
1666 | * | |
1667 | * struct LOOKUP3resok { | |
1668 | * nfs_fh3 object; | |
1669 | * post_op_attr obj_attributes; | |
1670 | * post_op_attr dir_attributes; | |
1671 | * }; | |
1672 | * | |
1673 | * struct LOOKUP3resfail { | |
1674 | * post_op_attr dir_attributes; | |
1675 | * }; | |
1676 | * | |
1677 | * union LOOKUP3res switch (nfsstat3 status) { | |
1678 | * case NFS3_OK: | |
1679 | * LOOKUP3resok resok; | |
1680 | * default: | |
1681 | * LOOKUP3resfail resfail; | |
1682 | * }; | |
1683 | */ | |
1684 | static int nfs3_xdr_dec_lookup3res(struct rpc_rqst *req, __be32 *p, | |
1685 | struct nfs3_diropres *result) | |
1686 | { | |
1687 | struct xdr_stream xdr; | |
1688 | enum nfs_stat status; | |
1689 | int error; | |
1690 | ||
1691 | xdr_init_decode(&xdr, &req->rq_rcv_buf, p); | |
1692 | error = decode_nfsstat3(&xdr, &status); | |
1693 | if (unlikely(error)) | |
1694 | goto out; | |
1695 | if (status != NFS3_OK) | |
1696 | goto out_default; | |
1697 | error = decode_nfs_fh3(&xdr, result->fh); | |
1698 | if (unlikely(error)) | |
1699 | goto out; | |
1700 | error = decode_post_op_attr(&xdr, result->fattr); | |
1701 | if (unlikely(error)) | |
1702 | goto out; | |
1703 | error = decode_post_op_attr(&xdr, result->dir_attr); | |
1704 | out: | |
1705 | return error; | |
1706 | out_default: | |
1707 | error = decode_post_op_attr(&xdr, result->dir_attr); | |
1708 | if (unlikely(error)) | |
1709 | goto out; | |
1710 | return nfs_stat_to_errno(status); | |
1711 | } | |
1712 | ||
1da177e4 LT |
1713 | /* |
1714 | * Decode ACCESS reply | |
1715 | */ | |
1716 | static int | |
d61005a6 | 1717 | nfs3_xdr_accessres(struct rpc_rqst *req, __be32 *p, struct nfs3_accessres *res) |
1da177e4 LT |
1718 | { |
1719 | int status = ntohl(*p++); | |
1720 | ||
1721 | p = xdr_decode_post_op_attr(p, res->fattr); | |
1722 | if (status) | |
856dff3d | 1723 | return nfs_stat_to_errno(status); |
1da177e4 LT |
1724 | res->access = ntohl(*p++); |
1725 | return 0; | |
1726 | } | |
1727 | ||
e4f93234 CL |
1728 | /* |
1729 | * 3.3.4 ACCESS3res | |
1730 | * | |
1731 | * struct ACCESS3resok { | |
1732 | * post_op_attr obj_attributes; | |
1733 | * uint32 access; | |
1734 | * }; | |
1735 | * | |
1736 | * struct ACCESS3resfail { | |
1737 | * post_op_attr obj_attributes; | |
1738 | * }; | |
1739 | * | |
1740 | * union ACCESS3res switch (nfsstat3 status) { | |
1741 | * case NFS3_OK: | |
1742 | * ACCESS3resok resok; | |
1743 | * default: | |
1744 | * ACCESS3resfail resfail; | |
1745 | * }; | |
1746 | */ | |
1747 | static int nfs3_xdr_dec_access3res(struct rpc_rqst *req, __be32 *p, | |
1748 | struct nfs3_accessres *result) | |
1749 | { | |
1750 | struct xdr_stream xdr; | |
1751 | enum nfs_stat status; | |
1752 | int error; | |
1753 | ||
1754 | xdr_init_decode(&xdr, &req->rq_rcv_buf, p); | |
1755 | error = decode_nfsstat3(&xdr, &status); | |
1756 | if (unlikely(error)) | |
1757 | goto out; | |
1758 | error = decode_post_op_attr(&xdr, result->fattr); | |
1759 | if (unlikely(error)) | |
1760 | goto out; | |
1761 | if (status != NFS3_OK) | |
1762 | goto out_default; | |
1763 | error = decode_uint32(&xdr, &result->access); | |
1764 | out: | |
1765 | return error; | |
1766 | out_default: | |
1767 | return nfs_stat_to_errno(status); | |
1768 | } | |
1769 | ||
1da177e4 LT |
1770 | /* |
1771 | * Decode READLINK reply | |
1772 | */ | |
1773 | static int | |
d61005a6 | 1774 | nfs3_xdr_readlinkres(struct rpc_rqst *req, __be32 *p, struct nfs_fattr *fattr) |
1da177e4 LT |
1775 | { |
1776 | struct xdr_buf *rcvbuf = &req->rq_rcv_buf; | |
1777 | struct kvec *iov = rcvbuf->head; | |
c957c526 CL |
1778 | size_t hdrlen; |
1779 | u32 len, recvd; | |
1da177e4 LT |
1780 | int status; |
1781 | ||
1782 | status = ntohl(*p++); | |
1783 | p = xdr_decode_post_op_attr(p, fattr); | |
1784 | ||
1785 | if (status != 0) | |
856dff3d | 1786 | return nfs_stat_to_errno(status); |
1da177e4 LT |
1787 | |
1788 | /* Convert length of symlink */ | |
1789 | len = ntohl(*p++); | |
c957c526 | 1790 | if (len >= rcvbuf->page_len) { |
fe82a183 | 1791 | dprintk("nfs: server returned giant symlink!\n"); |
1da177e4 LT |
1792 | return -ENAMETOOLONG; |
1793 | } | |
1794 | ||
1795 | hdrlen = (u8 *) p - (u8 *) iov->iov_base; | |
1796 | if (iov->iov_len < hdrlen) { | |
fe82a183 | 1797 | dprintk("NFS: READLINK reply header overflowed:" |
c957c526 | 1798 | "length %Zu > %Zu\n", hdrlen, iov->iov_len); |
1da177e4 LT |
1799 | return -errno_NFSERR_IO; |
1800 | } else if (iov->iov_len != hdrlen) { | |
fe82a183 CL |
1801 | dprintk("NFS: READLINK header is short. " |
1802 | "iovec will be shifted.\n"); | |
1da177e4 LT |
1803 | xdr_shift_buf(rcvbuf, iov->iov_len - hdrlen); |
1804 | } | |
1805 | recvd = req->rq_rcv_buf.len - hdrlen; | |
1806 | if (recvd < len) { | |
fe82a183 | 1807 | dprintk("NFS: server cheating in readlink reply: " |
1da177e4 LT |
1808 | "count %u > recvd %u\n", len, recvd); |
1809 | return -EIO; | |
1810 | } | |
1811 | ||
b4687da7 | 1812 | xdr_terminate_string(rcvbuf, len); |
1da177e4 LT |
1813 | return 0; |
1814 | } | |
1815 | ||
e4f93234 CL |
1816 | /* |
1817 | * 3.3.5 READLINK3res | |
1818 | * | |
1819 | * struct READLINK3resok { | |
1820 | * post_op_attr symlink_attributes; | |
1821 | * nfspath3 data; | |
1822 | * }; | |
1823 | * | |
1824 | * struct READLINK3resfail { | |
1825 | * post_op_attr symlink_attributes; | |
1826 | * }; | |
1827 | * | |
1828 | * union READLINK3res switch (nfsstat3 status) { | |
1829 | * case NFS3_OK: | |
1830 | * READLINK3resok resok; | |
1831 | * default: | |
1832 | * READLINK3resfail resfail; | |
1833 | * }; | |
1834 | */ | |
1835 | static int nfs3_xdr_dec_readlink3res(struct rpc_rqst *req, __be32 *p, | |
1836 | struct nfs_fattr *result) | |
1837 | { | |
1838 | struct xdr_stream xdr; | |
1839 | enum nfs_stat status; | |
1840 | int error; | |
1841 | ||
1842 | xdr_init_decode(&xdr, &req->rq_rcv_buf, p); | |
1843 | error = decode_nfsstat3(&xdr, &status); | |
1844 | if (unlikely(error)) | |
1845 | goto out; | |
1846 | error = decode_post_op_attr(&xdr, result); | |
1847 | if (unlikely(error)) | |
1848 | goto out; | |
1849 | if (status != NFS3_OK) | |
1850 | goto out_default; | |
1851 | error = decode_nfspath3(&xdr); | |
1852 | out: | |
1853 | return error; | |
1854 | out_default: | |
1855 | return nfs_stat_to_errno(status); | |
1856 | } | |
1857 | ||
1da177e4 LT |
1858 | /* |
1859 | * Decode READ reply | |
1860 | */ | |
1861 | static int | |
d61005a6 | 1862 | nfs3_xdr_readres(struct rpc_rqst *req, __be32 *p, struct nfs_readres *res) |
1da177e4 LT |
1863 | { |
1864 | struct kvec *iov = req->rq_rcv_buf.head; | |
c957c526 CL |
1865 | size_t hdrlen; |
1866 | u32 count, ocount, recvd; | |
1867 | int status; | |
1da177e4 LT |
1868 | |
1869 | status = ntohl(*p++); | |
1870 | p = xdr_decode_post_op_attr(p, res->fattr); | |
1871 | ||
1872 | if (status != 0) | |
856dff3d | 1873 | return nfs_stat_to_errno(status); |
1da177e4 | 1874 | |
c957c526 | 1875 | /* Decode reply count and EOF flag. NFSv3 is somewhat redundant |
1da177e4 LT |
1876 | * in that it puts the count both in the res struct and in the |
1877 | * opaque data count. */ | |
1878 | count = ntohl(*p++); | |
1879 | res->eof = ntohl(*p++); | |
1880 | ocount = ntohl(*p++); | |
1881 | ||
1882 | if (ocount != count) { | |
fe82a183 | 1883 | dprintk("NFS: READ count doesn't match RPC opaque count.\n"); |
1da177e4 LT |
1884 | return -errno_NFSERR_IO; |
1885 | } | |
1886 | ||
1887 | hdrlen = (u8 *) p - (u8 *) iov->iov_base; | |
1888 | if (iov->iov_len < hdrlen) { | |
fe82a183 | 1889 | dprintk("NFS: READ reply header overflowed:" |
c957c526 | 1890 | "length %Zu > %Zu\n", hdrlen, iov->iov_len); |
1da177e4 LT |
1891 | return -errno_NFSERR_IO; |
1892 | } else if (iov->iov_len != hdrlen) { | |
1893 | dprintk("NFS: READ header is short. iovec will be shifted.\n"); | |
1894 | xdr_shift_buf(&req->rq_rcv_buf, iov->iov_len - hdrlen); | |
1895 | } | |
1896 | ||
1897 | recvd = req->rq_rcv_buf.len - hdrlen; | |
1898 | if (count > recvd) { | |
fe82a183 | 1899 | dprintk("NFS: server cheating in read reply: " |
c957c526 | 1900 | "count %u > recvd %u\n", count, recvd); |
1da177e4 LT |
1901 | count = recvd; |
1902 | res->eof = 0; | |
1903 | } | |
1904 | ||
1905 | if (count < res->count) | |
1906 | res->count = count; | |
1907 | ||
1908 | return count; | |
1909 | } | |
1910 | ||
e4f93234 CL |
1911 | /* |
1912 | * 3.3.6 READ3res | |
1913 | * | |
1914 | * struct READ3resok { | |
1915 | * post_op_attr file_attributes; | |
1916 | * count3 count; | |
1917 | * bool eof; | |
1918 | * opaque data<>; | |
1919 | * }; | |
1920 | * | |
1921 | * struct READ3resfail { | |
1922 | * post_op_attr file_attributes; | |
1923 | * }; | |
1924 | * | |
1925 | * union READ3res switch (nfsstat3 status) { | |
1926 | * case NFS3_OK: | |
1927 | * READ3resok resok; | |
1928 | * default: | |
1929 | * READ3resfail resfail; | |
1930 | * }; | |
1931 | */ | |
1932 | static int decode_read3resok(struct xdr_stream *xdr, | |
1933 | struct nfs_readres *result) | |
1934 | { | |
1935 | u32 eof, count, ocount, recvd; | |
1936 | size_t hdrlen; | |
1937 | __be32 *p; | |
1938 | ||
1939 | p = xdr_inline_decode(xdr, 4 + 4 + 4); | |
1940 | if (unlikely(p == NULL)) | |
1941 | goto out_overflow; | |
1942 | count = be32_to_cpup(p++); | |
1943 | eof = be32_to_cpup(p++); | |
1944 | ocount = be32_to_cpup(p++); | |
1945 | if (unlikely(ocount != count)) | |
1946 | goto out_mismatch; | |
1947 | hdrlen = (u8 *)xdr->p - (u8 *)xdr->iov->iov_base; | |
1948 | recvd = xdr->buf->len - hdrlen; | |
1949 | if (unlikely(count > recvd)) | |
1950 | goto out_cheating; | |
1951 | ||
1952 | out: | |
1953 | xdr_read_pages(xdr, count); | |
1954 | result->eof = eof; | |
1955 | result->count = count; | |
1956 | return count; | |
1957 | out_mismatch: | |
1958 | dprintk("NFS: READ count doesn't match length of opaque: " | |
1959 | "count %u != ocount %u\n", count, ocount); | |
1960 | return -EIO; | |
1961 | out_cheating: | |
1962 | dprintk("NFS: server cheating in read result: " | |
1963 | "count %u > recvd %u\n", count, recvd); | |
1964 | count = recvd; | |
1965 | eof = 0; | |
1966 | goto out; | |
1967 | out_overflow: | |
1968 | print_overflow_msg(__func__, xdr); | |
1969 | return -EIO; | |
1970 | } | |
1971 | ||
1972 | static int nfs3_xdr_dec_read3res(struct rpc_rqst *req, __be32 *p, | |
1973 | struct nfs_readres *result) | |
1974 | { | |
1975 | struct xdr_stream xdr; | |
1976 | enum nfs_stat status; | |
1977 | int error; | |
1978 | ||
1979 | xdr_init_decode(&xdr, &req->rq_rcv_buf, p); | |
1980 | error = decode_nfsstat3(&xdr, &status); | |
1981 | if (unlikely(error)) | |
1982 | goto out; | |
1983 | error = decode_post_op_attr(&xdr, result->fattr); | |
1984 | if (unlikely(error)) | |
1985 | goto out; | |
1986 | if (status != NFS3_OK) | |
1987 | goto out_status; | |
1988 | error = decode_read3resok(&xdr, result); | |
1989 | out: | |
1990 | return error; | |
1991 | out_status: | |
1992 | return nfs_stat_to_errno(status); | |
1993 | } | |
1994 | ||
1da177e4 LT |
1995 | /* |
1996 | * Decode WRITE response | |
1997 | */ | |
1998 | static int | |
d61005a6 | 1999 | nfs3_xdr_writeres(struct rpc_rqst *req, __be32 *p, struct nfs_writeres *res) |
1da177e4 LT |
2000 | { |
2001 | int status; | |
2002 | ||
2003 | status = ntohl(*p++); | |
2004 | p = xdr_decode_wcc_data(p, res->fattr); | |
2005 | ||
2006 | if (status != 0) | |
856dff3d | 2007 | return nfs_stat_to_errno(status); |
1da177e4 LT |
2008 | |
2009 | res->count = ntohl(*p++); | |
2010 | res->verf->committed = (enum nfs3_stable_how)ntohl(*p++); | |
2011 | res->verf->verifier[0] = *p++; | |
2012 | res->verf->verifier[1] = *p++; | |
2013 | ||
2014 | return res->count; | |
2015 | } | |
2016 | ||
e4f93234 CL |
2017 | /* |
2018 | * 3.3.7 WRITE3res | |
2019 | * | |
2020 | * enum stable_how { | |
2021 | * UNSTABLE = 0, | |
2022 | * DATA_SYNC = 1, | |
2023 | * FILE_SYNC = 2 | |
2024 | * }; | |
2025 | * | |
2026 | * struct WRITE3resok { | |
2027 | * wcc_data file_wcc; | |
2028 | * count3 count; | |
2029 | * stable_how committed; | |
2030 | * writeverf3 verf; | |
2031 | * }; | |
2032 | * | |
2033 | * struct WRITE3resfail { | |
2034 | * wcc_data file_wcc; | |
2035 | * }; | |
2036 | * | |
2037 | * union WRITE3res switch (nfsstat3 status) { | |
2038 | * case NFS3_OK: | |
2039 | * WRITE3resok resok; | |
2040 | * default: | |
2041 | * WRITE3resfail resfail; | |
2042 | * }; | |
2043 | */ | |
2044 | static int decode_write3resok(struct xdr_stream *xdr, | |
2045 | struct nfs_writeres *result) | |
2046 | { | |
2047 | __be32 *p; | |
2048 | ||
2049 | p = xdr_inline_decode(xdr, 4 + 4 + NFS3_WRITEVERFSIZE); | |
2050 | if (unlikely(p == NULL)) | |
2051 | goto out_overflow; | |
2052 | result->count = be32_to_cpup(p++); | |
2053 | result->verf->committed = be32_to_cpup(p++); | |
2054 | if (unlikely(result->verf->committed > NFS_FILE_SYNC)) | |
2055 | goto out_badvalue; | |
2056 | memcpy(result->verf->verifier, p, NFS3_WRITEVERFSIZE); | |
2057 | return result->count; | |
2058 | out_badvalue: | |
2059 | dprintk("NFS: bad stable_how value: %u\n", result->verf->committed); | |
2060 | return -EIO; | |
2061 | out_overflow: | |
2062 | print_overflow_msg(__func__, xdr); | |
2063 | return -EIO; | |
2064 | } | |
2065 | ||
2066 | static int nfs3_xdr_dec_write3res(struct rpc_rqst *req, __be32 *p, | |
2067 | struct nfs_writeres *result) | |
2068 | { | |
2069 | struct xdr_stream xdr; | |
2070 | enum nfs_stat status; | |
2071 | int error; | |
2072 | ||
2073 | xdr_init_decode(&xdr, &req->rq_rcv_buf, p); | |
2074 | error = decode_nfsstat3(&xdr, &status); | |
2075 | if (unlikely(error)) | |
2076 | goto out; | |
2077 | error = decode_wcc_data(&xdr, result->fattr); | |
2078 | if (unlikely(error)) | |
2079 | goto out; | |
2080 | if (status != NFS3_OK) | |
2081 | goto out_status; | |
2082 | error = decode_write3resok(&xdr, result); | |
2083 | out: | |
2084 | return error; | |
2085 | out_status: | |
2086 | return nfs_stat_to_errno(status); | |
2087 | } | |
2088 | ||
1da177e4 LT |
2089 | /* |
2090 | * Decode a CREATE response | |
2091 | */ | |
2092 | static int | |
d61005a6 | 2093 | nfs3_xdr_createres(struct rpc_rqst *req, __be32 *p, struct nfs3_diropres *res) |
1da177e4 LT |
2094 | { |
2095 | int status; | |
2096 | ||
2097 | status = ntohl(*p++); | |
2098 | if (status == 0) { | |
2099 | if (*p++) { | |
2100 | if (!(p = xdr_decode_fhandle(p, res->fh))) | |
2101 | return -errno_NFSERR_IO; | |
2102 | p = xdr_decode_post_op_attr(p, res->fattr); | |
2103 | } else { | |
2104 | memset(res->fh, 0, sizeof(*res->fh)); | |
2105 | /* Do decode post_op_attr but set it to NULL */ | |
2106 | p = xdr_decode_post_op_attr(p, res->fattr); | |
2107 | res->fattr->valid = 0; | |
2108 | } | |
2109 | } else { | |
856dff3d | 2110 | status = nfs_stat_to_errno(status); |
1da177e4 LT |
2111 | } |
2112 | p = xdr_decode_wcc_data(p, res->dir_attr); | |
2113 | return status; | |
2114 | } | |
2115 | ||
e4f93234 CL |
2116 | /* |
2117 | * 3.3.8 CREATE3res | |
2118 | * | |
2119 | * struct CREATE3resok { | |
2120 | * post_op_fh3 obj; | |
2121 | * post_op_attr obj_attributes; | |
2122 | * wcc_data dir_wcc; | |
2123 | * }; | |
2124 | * | |
2125 | * struct CREATE3resfail { | |
2126 | * wcc_data dir_wcc; | |
2127 | * }; | |
2128 | * | |
2129 | * union CREATE3res switch (nfsstat3 status) { | |
2130 | * case NFS3_OK: | |
2131 | * CREATE3resok resok; | |
2132 | * default: | |
2133 | * CREATE3resfail resfail; | |
2134 | * }; | |
2135 | */ | |
2136 | static int decode_create3resok(struct xdr_stream *xdr, | |
2137 | struct nfs3_diropres *result) | |
2138 | { | |
2139 | int error; | |
2140 | ||
2141 | error = decode_post_op_fh3(xdr, result->fh); | |
2142 | if (unlikely(error)) | |
2143 | goto out; | |
2144 | error = decode_post_op_attr(xdr, result->fattr); | |
2145 | if (unlikely(error)) | |
2146 | goto out; | |
2147 | /* The server isn't required to return a file handle. | |
2148 | * If it didn't, force the client to perform a LOOKUP | |
2149 | * to determine the correct file handle and attribute | |
2150 | * values for the new object. */ | |
2151 | if (result->fh->size == 0) | |
2152 | result->fattr->valid = 0; | |
2153 | error = decode_wcc_data(xdr, result->dir_attr); | |
2154 | out: | |
2155 | return error; | |
2156 | } | |
2157 | ||
2158 | static int nfs3_xdr_dec_create3res(struct rpc_rqst *req, __be32 *p, | |
2159 | struct nfs3_diropres *result) | |
2160 | { | |
2161 | struct xdr_stream xdr; | |
2162 | enum nfs_stat status; | |
2163 | int error; | |
2164 | ||
2165 | xdr_init_decode(&xdr, &req->rq_rcv_buf, p); | |
2166 | error = decode_nfsstat3(&xdr, &status); | |
2167 | if (unlikely(error)) | |
2168 | goto out; | |
2169 | if (status != NFS3_OK) | |
2170 | goto out_default; | |
2171 | error = decode_create3resok(&xdr, result); | |
2172 | out: | |
2173 | return error; | |
2174 | out_default: | |
2175 | error = decode_wcc_data(&xdr, result->dir_attr); | |
2176 | if (unlikely(error)) | |
2177 | goto out; | |
2178 | return nfs_stat_to_errno(status); | |
2179 | } | |
2180 | ||
2181 | /* | |
2182 | * 3.3.12 REMOVE3res | |
2183 | * | |
2184 | * struct REMOVE3resok { | |
2185 | * wcc_data dir_wcc; | |
2186 | * }; | |
2187 | * | |
2188 | * struct REMOVE3resfail { | |
2189 | * wcc_data dir_wcc; | |
2190 | * }; | |
2191 | * | |
2192 | * union REMOVE3res switch (nfsstat3 status) { | |
2193 | * case NFS3_OK: | |
2194 | * REMOVE3resok resok; | |
2195 | * default: | |
2196 | * REMOVE3resfail resfail; | |
2197 | * }; | |
2198 | */ | |
2199 | static int nfs3_xdr_dec_remove3res(struct rpc_rqst *req, __be32 *p, | |
2200 | struct nfs_removeres *result) | |
2201 | { | |
2202 | struct xdr_stream xdr; | |
2203 | enum nfs_stat status; | |
2204 | int error; | |
2205 | ||
2206 | xdr_init_decode(&xdr, &req->rq_rcv_buf, p); | |
2207 | error = decode_nfsstat3(&xdr, &status); | |
2208 | if (unlikely(error)) | |
2209 | goto out; | |
2210 | error = decode_wcc_data(&xdr, result->dir_attr); | |
2211 | if (unlikely(error)) | |
2212 | goto out; | |
2213 | if (status != NFS3_OK) | |
2214 | goto out_status; | |
2215 | out: | |
2216 | return error; | |
2217 | out_status: | |
2218 | return nfs_stat_to_errno(status); | |
2219 | } | |
2220 | ||
1da177e4 LT |
2221 | /* |
2222 | * Decode RENAME reply | |
2223 | */ | |
2224 | static int | |
e8582a8b | 2225 | nfs3_xdr_renameres(struct rpc_rqst *req, __be32 *p, struct nfs_renameres *res) |
1da177e4 LT |
2226 | { |
2227 | int status; | |
2228 | ||
2229 | if ((status = ntohl(*p++)) != 0) | |
856dff3d | 2230 | status = nfs_stat_to_errno(status); |
e8582a8b JL |
2231 | p = xdr_decode_wcc_data(p, res->old_fattr); |
2232 | p = xdr_decode_wcc_data(p, res->new_fattr); | |
1da177e4 LT |
2233 | return status; |
2234 | } | |
2235 | ||
e4f93234 CL |
2236 | /* |
2237 | * 3.3.14 RENAME3res | |
2238 | * | |
2239 | * struct RENAME3resok { | |
2240 | * wcc_data fromdir_wcc; | |
2241 | * wcc_data todir_wcc; | |
2242 | * }; | |
2243 | * | |
2244 | * struct RENAME3resfail { | |
2245 | * wcc_data fromdir_wcc; | |
2246 | * wcc_data todir_wcc; | |
2247 | * }; | |
2248 | * | |
2249 | * union RENAME3res switch (nfsstat3 status) { | |
2250 | * case NFS3_OK: | |
2251 | * RENAME3resok resok; | |
2252 | * default: | |
2253 | * RENAME3resfail resfail; | |
2254 | * }; | |
2255 | */ | |
2256 | static int nfs3_xdr_dec_rename3res(struct rpc_rqst *req, __be32 *p, | |
2257 | struct nfs_renameres *result) | |
2258 | { | |
2259 | struct xdr_stream xdr; | |
2260 | enum nfs_stat status; | |
2261 | int error; | |
2262 | ||
2263 | xdr_init_decode(&xdr, &req->rq_rcv_buf, p); | |
2264 | error = decode_nfsstat3(&xdr, &status); | |
2265 | if (unlikely(error)) | |
2266 | goto out; | |
2267 | error = decode_wcc_data(&xdr, result->old_fattr); | |
2268 | if (unlikely(error)) | |
2269 | goto out; | |
2270 | error = decode_wcc_data(&xdr, result->new_fattr); | |
2271 | if (unlikely(error)) | |
2272 | goto out; | |
2273 | if (status != NFS3_OK) | |
2274 | goto out_status; | |
2275 | out: | |
2276 | return error; | |
2277 | out_status: | |
2278 | return nfs_stat_to_errno(status); | |
2279 | } | |
2280 | ||
1da177e4 LT |
2281 | /* |
2282 | * Decode LINK reply | |
2283 | */ | |
2284 | static int | |
d61005a6 | 2285 | nfs3_xdr_linkres(struct rpc_rqst *req, __be32 *p, struct nfs3_linkres *res) |
1da177e4 LT |
2286 | { |
2287 | int status; | |
2288 | ||
2289 | if ((status = ntohl(*p++)) != 0) | |
856dff3d | 2290 | status = nfs_stat_to_errno(status); |
1da177e4 LT |
2291 | p = xdr_decode_post_op_attr(p, res->fattr); |
2292 | p = xdr_decode_wcc_data(p, res->dir_attr); | |
2293 | return status; | |
2294 | } | |
2295 | ||
e4f93234 CL |
2296 | /* |
2297 | * 3.3.15 LINK3res | |
2298 | * | |
2299 | * struct LINK3resok { | |
2300 | * post_op_attr file_attributes; | |
2301 | * wcc_data linkdir_wcc; | |
2302 | * }; | |
2303 | * | |
2304 | * struct LINK3resfail { | |
2305 | * post_op_attr file_attributes; | |
2306 | * wcc_data linkdir_wcc; | |
2307 | * }; | |
2308 | * | |
2309 | * union LINK3res switch (nfsstat3 status) { | |
2310 | * case NFS3_OK: | |
2311 | * LINK3resok resok; | |
2312 | * default: | |
2313 | * LINK3resfail resfail; | |
2314 | * }; | |
2315 | */ | |
2316 | static int nfs3_xdr_dec_link3res(struct rpc_rqst *req, __be32 *p, | |
2317 | struct nfs3_linkres *result) | |
2318 | { | |
2319 | struct xdr_stream xdr; | |
2320 | enum nfs_stat status; | |
2321 | int error; | |
2322 | ||
2323 | xdr_init_decode(&xdr, &req->rq_rcv_buf, p); | |
2324 | error = decode_nfsstat3(&xdr, &status); | |
2325 | if (unlikely(error)) | |
2326 | goto out; | |
2327 | error = decode_post_op_attr(&xdr, result->fattr); | |
2328 | if (unlikely(error)) | |
2329 | goto out; | |
2330 | error = decode_wcc_data(&xdr, result->dir_attr); | |
2331 | if (unlikely(error)) | |
2332 | goto out; | |
2333 | if (status != NFS3_OK) | |
2334 | goto out_status; | |
2335 | out: | |
2336 | return error; | |
2337 | out_status: | |
2338 | return nfs_stat_to_errno(status); | |
2339 | } | |
2340 | ||
2341 | /** | |
2342 | * nfs3_decode_dirent - Decode a single NFSv3 directory entry stored in | |
2343 | * the local page cache | |
2344 | * @xdr: XDR stream where entry resides | |
2345 | * @entry: buffer to fill in with entry data | |
2346 | * @server: nfs_server data for this directory | |
2347 | * @plus: boolean indicating whether this should be a readdirplus entry | |
2348 | * | |
2349 | * Returns the position of the next item in the buffer, or an ERR_PTR. | |
2350 | * | |
2351 | * This function is not invoked during READDIR reply decoding, but | |
2352 | * rather whenever an application invokes the getdents(2) system call | |
2353 | * on a directory already in our cache. | |
2354 | * | |
2355 | * 3.3.16 entry3 | |
2356 | * | |
2357 | * struct entry3 { | |
2358 | * fileid3 fileid; | |
2359 | * filename3 name; | |
2360 | * cookie3 cookie; | |
2361 | * fhandle3 filehandle; | |
2362 | * post_op_attr3 attributes; | |
2363 | * entry3 *nextentry; | |
2364 | * }; | |
2365 | * | |
2366 | * 3.3.17 entryplus3 | |
2367 | * struct entryplus3 { | |
2368 | * fileid3 fileid; | |
2369 | * filename3 name; | |
2370 | * cookie3 cookie; | |
2371 | * post_op_attr name_attributes; | |
2372 | * post_op_fh3 name_handle; | |
2373 | * entryplus3 *nextentry; | |
2374 | * }; | |
2375 | */ | |
2376 | __be32 *nfs3_decode_dirent(struct xdr_stream *xdr, struct nfs_entry *entry, | |
2377 | struct nfs_server *server, int plus) | |
2378 | { | |
2379 | struct nfs_entry old = *entry; | |
2380 | __be32 *p; | |
2381 | int error; | |
2382 | ||
2383 | p = xdr_inline_decode(xdr, 4); | |
2384 | if (unlikely(p == NULL)) | |
2385 | goto out_overflow; | |
2386 | if (*p == xdr_zero) { | |
2387 | p = xdr_inline_decode(xdr, 4); | |
2388 | if (unlikely(p == NULL)) | |
2389 | goto out_overflow; | |
2390 | if (*p == xdr_zero) | |
2391 | return ERR_PTR(-EAGAIN); | |
2392 | entry->eof = 1; | |
2393 | return ERR_PTR(-EBADCOOKIE); | |
2394 | } | |
2395 | ||
2396 | error = decode_fileid3(xdr, &entry->ino); | |
2397 | if (unlikely(error)) | |
2398 | return ERR_PTR(error); | |
2399 | ||
2400 | error = decode_inline_filename3(xdr, &entry->name, &entry->len); | |
2401 | if (unlikely(error)) | |
2402 | return ERR_PTR(error); | |
2403 | ||
2404 | entry->prev_cookie = entry->cookie; | |
2405 | error = decode_cookie3(xdr, &entry->cookie); | |
2406 | if (unlikely(error)) | |
2407 | return ERR_PTR(error); | |
2408 | ||
2409 | entry->d_type = DT_UNKNOWN; | |
2410 | ||
2411 | if (plus) { | |
2412 | entry->fattr->valid = 0; | |
2413 | error = decode_post_op_attr(xdr, entry->fattr); | |
2414 | if (unlikely(error)) | |
2415 | return ERR_PTR(error); | |
2416 | if (entry->fattr->valid & NFS_ATTR_FATTR_V3) | |
2417 | entry->d_type = nfs_umode_to_dtype(entry->fattr->mode); | |
2418 | ||
2419 | /* In fact, a post_op_fh3: */ | |
2420 | p = xdr_inline_decode(xdr, 4); | |
2421 | if (unlikely(p == NULL)) | |
2422 | goto out_overflow; | |
2423 | if (*p != xdr_zero) { | |
2424 | error = decode_nfs_fh3(xdr, entry->fh); | |
2425 | if (unlikely(error)) { | |
2426 | if (error == -E2BIG) | |
2427 | goto out_truncated; | |
2428 | return ERR_PTR(error); | |
2429 | } | |
2430 | } else | |
2431 | zero_nfs_fh3(entry->fh); | |
2432 | } | |
2433 | ||
2434 | /* Peek at the next entry to see if we're at EOD */ | |
2435 | p = xdr_inline_peek(xdr, 4 + 4); | |
2436 | entry->eof = 0; | |
2437 | if (p != NULL) | |
2438 | entry->eof = (p[0] == xdr_zero) && (p[1] != xdr_zero); | |
2439 | return p; | |
2440 | ||
2441 | out_overflow: | |
2442 | print_overflow_msg(__func__, xdr); | |
2443 | return ERR_PTR(-EAGAIN); | |
2444 | out_truncated: | |
2445 | dprintk("NFS: directory entry contains invalid file handle\n"); | |
2446 | *entry = old; | |
2447 | return ERR_PTR(-EAGAIN); | |
2448 | } | |
2449 | ||
2450 | /* | |
2451 | * 3.3.16 READDIR3res | |
2452 | * | |
2453 | * struct dirlist3 { | |
2454 | * entry3 *entries; | |
2455 | * bool eof; | |
2456 | * }; | |
2457 | * | |
2458 | * struct READDIR3resok { | |
2459 | * post_op_attr dir_attributes; | |
2460 | * cookieverf3 cookieverf; | |
2461 | * dirlist3 reply; | |
2462 | * }; | |
2463 | * | |
2464 | * struct READDIR3resfail { | |
2465 | * post_op_attr dir_attributes; | |
2466 | * }; | |
2467 | * | |
2468 | * union READDIR3res switch (nfsstat3 status) { | |
2469 | * case NFS3_OK: | |
2470 | * READDIR3resok resok; | |
2471 | * default: | |
2472 | * READDIR3resfail resfail; | |
2473 | * }; | |
2474 | * | |
2475 | * Read the directory contents into the page cache, but otherwise | |
2476 | * don't touch them. The actual decoding is done by nfs3_decode_entry() | |
2477 | * during subsequent nfs_readdir() calls. | |
2478 | */ | |
2479 | static int decode_dirlist3(struct xdr_stream *xdr) | |
2480 | { | |
2481 | u32 recvd, pglen; | |
2482 | size_t hdrlen; | |
2483 | ||
2484 | pglen = xdr->buf->page_len; | |
2485 | hdrlen = (u8 *)xdr->p - (u8 *)xdr->iov->iov_base; | |
2486 | recvd = xdr->buf->len - hdrlen; | |
2487 | if (unlikely(pglen > recvd)) | |
2488 | goto out_cheating; | |
2489 | out: | |
2490 | xdr_read_pages(xdr, pglen); | |
2491 | return pglen; | |
2492 | out_cheating: | |
2493 | dprintk("NFS: server cheating in readdir result: " | |
2494 | "pglen %u > recvd %u\n", pglen, recvd); | |
2495 | pglen = recvd; | |
2496 | goto out; | |
2497 | } | |
2498 | ||
2499 | static int decode_readdir3resok(struct xdr_stream *xdr, | |
2500 | struct nfs3_readdirres *result) | |
2501 | { | |
2502 | int error; | |
2503 | ||
2504 | error = decode_post_op_attr(xdr, result->dir_attr); | |
2505 | if (unlikely(error)) | |
2506 | goto out; | |
2507 | /* XXX: do we need to check if result->verf != NULL ? */ | |
2508 | error = decode_cookieverf3(xdr, result->verf); | |
2509 | if (unlikely(error)) | |
2510 | goto out; | |
2511 | error = decode_dirlist3(xdr); | |
2512 | out: | |
2513 | return error; | |
2514 | } | |
2515 | ||
2516 | static int nfs3_xdr_dec_readdir3res(struct rpc_rqst *req, __be32 *p, | |
2517 | struct nfs3_readdirres *result) | |
2518 | { | |
2519 | struct xdr_stream xdr; | |
2520 | enum nfs_stat status; | |
2521 | int error; | |
2522 | ||
2523 | xdr_init_decode(&xdr, &req->rq_rcv_buf, p); | |
2524 | error = decode_nfsstat3(&xdr, &status); | |
2525 | if (unlikely(error)) | |
2526 | goto out; | |
2527 | if (status != NFS3_OK) | |
2528 | goto out_default; | |
2529 | error = decode_readdir3resok(&xdr, result); | |
2530 | out: | |
2531 | return error; | |
2532 | out_default: | |
2533 | error = decode_post_op_attr(&xdr, result->dir_attr); | |
2534 | if (unlikely(error)) | |
2535 | goto out; | |
2536 | return nfs_stat_to_errno(status); | |
2537 | } | |
2538 | ||
1da177e4 LT |
2539 | /* |
2540 | * Decode FSSTAT reply | |
2541 | */ | |
2542 | static int | |
d61005a6 | 2543 | nfs3_xdr_fsstatres(struct rpc_rqst *req, __be32 *p, struct nfs_fsstat *res) |
1da177e4 LT |
2544 | { |
2545 | int status; | |
2546 | ||
2547 | status = ntohl(*p++); | |
2548 | ||
2549 | p = xdr_decode_post_op_attr(p, res->fattr); | |
2550 | if (status != 0) | |
856dff3d | 2551 | return nfs_stat_to_errno(status); |
1da177e4 LT |
2552 | |
2553 | p = xdr_decode_hyper(p, &res->tbytes); | |
2554 | p = xdr_decode_hyper(p, &res->fbytes); | |
2555 | p = xdr_decode_hyper(p, &res->abytes); | |
2556 | p = xdr_decode_hyper(p, &res->tfiles); | |
2557 | p = xdr_decode_hyper(p, &res->ffiles); | |
2558 | p = xdr_decode_hyper(p, &res->afiles); | |
2559 | ||
2560 | /* ignore invarsec */ | |
2561 | return 0; | |
2562 | } | |
2563 | ||
e4f93234 CL |
2564 | /* |
2565 | * 3.3.18 FSSTAT3res | |
2566 | * | |
2567 | * struct FSSTAT3resok { | |
2568 | * post_op_attr obj_attributes; | |
2569 | * size3 tbytes; | |
2570 | * size3 fbytes; | |
2571 | * size3 abytes; | |
2572 | * size3 tfiles; | |
2573 | * size3 ffiles; | |
2574 | * size3 afiles; | |
2575 | * uint32 invarsec; | |
2576 | * }; | |
2577 | * | |
2578 | * struct FSSTAT3resfail { | |
2579 | * post_op_attr obj_attributes; | |
2580 | * }; | |
2581 | * | |
2582 | * union FSSTAT3res switch (nfsstat3 status) { | |
2583 | * case NFS3_OK: | |
2584 | * FSSTAT3resok resok; | |
2585 | * default: | |
2586 | * FSSTAT3resfail resfail; | |
2587 | * }; | |
2588 | */ | |
2589 | static int decode_fsstat3resok(struct xdr_stream *xdr, | |
2590 | struct nfs_fsstat *result) | |
2591 | { | |
2592 | __be32 *p; | |
2593 | ||
2594 | p = xdr_inline_decode(xdr, 8 * 6 + 4); | |
2595 | if (unlikely(p == NULL)) | |
2596 | goto out_overflow; | |
2597 | p = xdr_decode_size3(p, &result->tbytes); | |
2598 | p = xdr_decode_size3(p, &result->fbytes); | |
2599 | p = xdr_decode_size3(p, &result->abytes); | |
2600 | p = xdr_decode_size3(p, &result->tfiles); | |
2601 | p = xdr_decode_size3(p, &result->ffiles); | |
2602 | xdr_decode_size3(p, &result->afiles); | |
2603 | /* ignore invarsec */ | |
2604 | return 0; | |
2605 | out_overflow: | |
2606 | print_overflow_msg(__func__, xdr); | |
2607 | return -EIO; | |
2608 | } | |
2609 | ||
2610 | static int nfs3_xdr_dec_fsstat3res(struct rpc_rqst *req, __be32 *p, | |
2611 | struct nfs_fsstat *result) | |
2612 | { | |
2613 | struct xdr_stream xdr; | |
2614 | enum nfs_stat status; | |
2615 | int error; | |
2616 | ||
2617 | xdr_init_decode(&xdr, &req->rq_rcv_buf, p); | |
2618 | error = decode_nfsstat3(&xdr, &status); | |
2619 | if (unlikely(error)) | |
2620 | goto out; | |
2621 | error = decode_post_op_attr(&xdr, result->fattr); | |
2622 | if (unlikely(error)) | |
2623 | goto out; | |
2624 | if (status != NFS3_OK) | |
2625 | goto out_status; | |
2626 | error = decode_fsstat3resok(&xdr, result); | |
2627 | out: | |
2628 | return error; | |
2629 | out_status: | |
2630 | return nfs_stat_to_errno(status); | |
2631 | } | |
2632 | ||
1da177e4 LT |
2633 | /* |
2634 | * Decode FSINFO reply | |
2635 | */ | |
2636 | static int | |
d61005a6 | 2637 | nfs3_xdr_fsinfores(struct rpc_rqst *req, __be32 *p, struct nfs_fsinfo *res) |
1da177e4 LT |
2638 | { |
2639 | int status; | |
2640 | ||
2641 | status = ntohl(*p++); | |
2642 | ||
2643 | p = xdr_decode_post_op_attr(p, res->fattr); | |
2644 | if (status != 0) | |
856dff3d | 2645 | return nfs_stat_to_errno(status); |
1da177e4 LT |
2646 | |
2647 | res->rtmax = ntohl(*p++); | |
2648 | res->rtpref = ntohl(*p++); | |
2649 | res->rtmult = ntohl(*p++); | |
2650 | res->wtmax = ntohl(*p++); | |
2651 | res->wtpref = ntohl(*p++); | |
2652 | res->wtmult = ntohl(*p++); | |
2653 | res->dtpref = ntohl(*p++); | |
2654 | p = xdr_decode_hyper(p, &res->maxfilesize); | |
6b96724e | 2655 | p = xdr_decode_time3(p, &res->time_delta); |
1da177e4 | 2656 | |
6b96724e | 2657 | /* ignore properties */ |
1da177e4 LT |
2658 | res->lease_time = 0; |
2659 | return 0; | |
2660 | } | |
2661 | ||
e4f93234 CL |
2662 | /* |
2663 | * 3.3.19 FSINFO3res | |
2664 | * | |
2665 | * struct FSINFO3resok { | |
2666 | * post_op_attr obj_attributes; | |
2667 | * uint32 rtmax; | |
2668 | * uint32 rtpref; | |
2669 | * uint32 rtmult; | |
2670 | * uint32 wtmax; | |
2671 | * uint32 wtpref; | |
2672 | * uint32 wtmult; | |
2673 | * uint32 dtpref; | |
2674 | * size3 maxfilesize; | |
2675 | * nfstime3 time_delta; | |
2676 | * uint32 properties; | |
2677 | * }; | |
2678 | * | |
2679 | * struct FSINFO3resfail { | |
2680 | * post_op_attr obj_attributes; | |
2681 | * }; | |
2682 | * | |
2683 | * union FSINFO3res switch (nfsstat3 status) { | |
2684 | * case NFS3_OK: | |
2685 | * FSINFO3resok resok; | |
2686 | * default: | |
2687 | * FSINFO3resfail resfail; | |
2688 | * }; | |
2689 | */ | |
2690 | static int decode_fsinfo3resok(struct xdr_stream *xdr, | |
2691 | struct nfs_fsinfo *result) | |
2692 | { | |
2693 | __be32 *p; | |
2694 | ||
2695 | p = xdr_inline_decode(xdr, 4 * 7 + 8 + 8 + 4); | |
2696 | if (unlikely(p == NULL)) | |
2697 | goto out_overflow; | |
2698 | result->rtmax = be32_to_cpup(p++); | |
2699 | result->rtpref = be32_to_cpup(p++); | |
2700 | result->rtmult = be32_to_cpup(p++); | |
2701 | result->wtmax = be32_to_cpup(p++); | |
2702 | result->wtpref = be32_to_cpup(p++); | |
2703 | result->wtmult = be32_to_cpup(p++); | |
2704 | result->dtpref = be32_to_cpup(p++); | |
2705 | p = xdr_decode_size3(p, &result->maxfilesize); | |
2706 | xdr_decode_time3(p, &result->time_delta); | |
2707 | ||
2708 | /* ignore properties */ | |
2709 | result->lease_time = 0; | |
2710 | return 0; | |
2711 | out_overflow: | |
2712 | print_overflow_msg(__func__, xdr); | |
2713 | return -EIO; | |
2714 | } | |
2715 | ||
2716 | static int nfs3_xdr_dec_fsinfo3res(struct rpc_rqst *req, __be32 *p, | |
2717 | struct nfs_fsinfo *result) | |
2718 | { | |
2719 | struct xdr_stream xdr; | |
2720 | enum nfs_stat status; | |
2721 | int error; | |
2722 | ||
2723 | xdr_init_decode(&xdr, &req->rq_rcv_buf, p); | |
2724 | error = decode_nfsstat3(&xdr, &status); | |
2725 | if (unlikely(error)) | |
2726 | goto out; | |
2727 | error = decode_post_op_attr(&xdr, result->fattr); | |
2728 | if (unlikely(error)) | |
2729 | goto out; | |
2730 | if (status != NFS3_OK) | |
2731 | goto out_status; | |
2732 | error = decode_fsinfo3resok(&xdr, result); | |
2733 | out: | |
2734 | return error; | |
2735 | out_status: | |
2736 | return nfs_stat_to_errno(status); | |
2737 | } | |
2738 | ||
1da177e4 LT |
2739 | /* |
2740 | * Decode PATHCONF reply | |
2741 | */ | |
2742 | static int | |
d61005a6 | 2743 | nfs3_xdr_pathconfres(struct rpc_rqst *req, __be32 *p, struct nfs_pathconf *res) |
1da177e4 LT |
2744 | { |
2745 | int status; | |
2746 | ||
2747 | status = ntohl(*p++); | |
2748 | ||
2749 | p = xdr_decode_post_op_attr(p, res->fattr); | |
2750 | if (status != 0) | |
856dff3d | 2751 | return nfs_stat_to_errno(status); |
1da177e4 LT |
2752 | res->max_link = ntohl(*p++); |
2753 | res->max_namelen = ntohl(*p++); | |
2754 | ||
2755 | /* ignore remaining fields */ | |
2756 | return 0; | |
2757 | } | |
2758 | ||
e4f93234 CL |
2759 | /* |
2760 | * 3.3.20 PATHCONF3res | |
2761 | * | |
2762 | * struct PATHCONF3resok { | |
2763 | * post_op_attr obj_attributes; | |
2764 | * uint32 linkmax; | |
2765 | * uint32 name_max; | |
2766 | * bool no_trunc; | |
2767 | * bool chown_restricted; | |
2768 | * bool case_insensitive; | |
2769 | * bool case_preserving; | |
2770 | * }; | |
2771 | * | |
2772 | * struct PATHCONF3resfail { | |
2773 | * post_op_attr obj_attributes; | |
2774 | * }; | |
2775 | * | |
2776 | * union PATHCONF3res switch (nfsstat3 status) { | |
2777 | * case NFS3_OK: | |
2778 | * PATHCONF3resok resok; | |
2779 | * default: | |
2780 | * PATHCONF3resfail resfail; | |
2781 | * }; | |
2782 | */ | |
2783 | static int decode_pathconf3resok(struct xdr_stream *xdr, | |
2784 | struct nfs_pathconf *result) | |
2785 | { | |
2786 | __be32 *p; | |
2787 | ||
2788 | p = xdr_inline_decode(xdr, 4 * 6); | |
2789 | if (unlikely(p == NULL)) | |
2790 | goto out_overflow; | |
2791 | result->max_link = be32_to_cpup(p++); | |
2792 | result->max_namelen = be32_to_cpup(p); | |
2793 | /* ignore remaining fields */ | |
2794 | return 0; | |
2795 | out_overflow: | |
2796 | print_overflow_msg(__func__, xdr); | |
2797 | return -EIO; | |
2798 | } | |
2799 | ||
2800 | static int nfs3_xdr_dec_pathconf3res(struct rpc_rqst *req, __be32 *p, | |
2801 | struct nfs_pathconf *result) | |
2802 | { | |
2803 | struct xdr_stream xdr; | |
2804 | enum nfs_stat status; | |
2805 | int error; | |
2806 | ||
2807 | xdr_init_decode(&xdr, &req->rq_rcv_buf, p); | |
2808 | error = decode_nfsstat3(&xdr, &status); | |
2809 | if (unlikely(error)) | |
2810 | goto out; | |
2811 | error = decode_post_op_attr(&xdr, result->fattr); | |
2812 | if (unlikely(error)) | |
2813 | goto out; | |
2814 | if (status != NFS3_OK) | |
2815 | goto out_status; | |
2816 | error = decode_pathconf3resok(&xdr, result); | |
2817 | out: | |
2818 | return error; | |
2819 | out_status: | |
2820 | return nfs_stat_to_errno(status); | |
2821 | } | |
2822 | ||
1da177e4 LT |
2823 | /* |
2824 | * Decode COMMIT reply | |
2825 | */ | |
2826 | static int | |
d61005a6 | 2827 | nfs3_xdr_commitres(struct rpc_rqst *req, __be32 *p, struct nfs_writeres *res) |
1da177e4 LT |
2828 | { |
2829 | int status; | |
2830 | ||
2831 | status = ntohl(*p++); | |
2832 | p = xdr_decode_wcc_data(p, res->fattr); | |
2833 | if (status != 0) | |
856dff3d | 2834 | return nfs_stat_to_errno(status); |
1da177e4 LT |
2835 | |
2836 | res->verf->verifier[0] = *p++; | |
2837 | res->verf->verifier[1] = *p++; | |
2838 | return 0; | |
2839 | } | |
2840 | ||
e4f93234 CL |
2841 | /* |
2842 | * 3.3.21 COMMIT3res | |
2843 | * | |
2844 | * struct COMMIT3resok { | |
2845 | * wcc_data file_wcc; | |
2846 | * writeverf3 verf; | |
2847 | * }; | |
2848 | * | |
2849 | * struct COMMIT3resfail { | |
2850 | * wcc_data file_wcc; | |
2851 | * }; | |
2852 | * | |
2853 | * union COMMIT3res switch (nfsstat3 status) { | |
2854 | * case NFS3_OK: | |
2855 | * COMMIT3resok resok; | |
2856 | * default: | |
2857 | * COMMIT3resfail resfail; | |
2858 | * }; | |
2859 | */ | |
2860 | static int nfs3_xdr_dec_commit3res(struct rpc_rqst *req, __be32 *p, | |
2861 | struct nfs_writeres *result) | |
2862 | { | |
2863 | struct xdr_stream xdr; | |
2864 | enum nfs_stat status; | |
2865 | int error; | |
2866 | ||
2867 | xdr_init_decode(&xdr, &req->rq_rcv_buf, p); | |
2868 | error = decode_nfsstat3(&xdr, &status); | |
2869 | if (unlikely(error)) | |
2870 | goto out; | |
2871 | error = decode_wcc_data(&xdr, result->fattr); | |
2872 | if (unlikely(error)) | |
2873 | goto out; | |
2874 | if (status != NFS3_OK) | |
2875 | goto out_status; | |
2876 | error = decode_writeverf3(&xdr, result->verf->verifier); | |
2877 | out: | |
2878 | return error; | |
2879 | out_status: | |
2880 | return nfs_stat_to_errno(status); | |
2881 | } | |
2882 | ||
b7fa0554 AG |
2883 | #ifdef CONFIG_NFS_V3_ACL |
2884 | /* | |
2885 | * Decode GETACL reply | |
2886 | */ | |
2887 | static int | |
d61005a6 | 2888 | nfs3_xdr_getaclres(struct rpc_rqst *req, __be32 *p, |
b7fa0554 AG |
2889 | struct nfs3_getaclres *res) |
2890 | { | |
2891 | struct xdr_buf *buf = &req->rq_rcv_buf; | |
2892 | int status = ntohl(*p++); | |
2893 | struct posix_acl **acl; | |
2894 | unsigned int *aclcnt; | |
2895 | int err, base; | |
2896 | ||
2897 | if (status != 0) | |
856dff3d | 2898 | return nfs_stat_to_errno(status); |
b7fa0554 AG |
2899 | p = xdr_decode_post_op_attr(p, res->fattr); |
2900 | res->mask = ntohl(*p++); | |
2901 | if (res->mask & ~(NFS_ACL|NFS_ACLCNT|NFS_DFACL|NFS_DFACLCNT)) | |
2902 | return -EINVAL; | |
2903 | base = (char *)p - (char *)req->rq_rcv_buf.head->iov_base; | |
2904 | ||
2905 | acl = (res->mask & NFS_ACL) ? &res->acl_access : NULL; | |
2906 | aclcnt = (res->mask & NFS_ACLCNT) ? &res->acl_access_count : NULL; | |
2907 | err = nfsacl_decode(buf, base, aclcnt, acl); | |
2908 | ||
2909 | acl = (res->mask & NFS_DFACL) ? &res->acl_default : NULL; | |
2910 | aclcnt = (res->mask & NFS_DFACLCNT) ? &res->acl_default_count : NULL; | |
2911 | if (err > 0) | |
2912 | err = nfsacl_decode(buf, base + err, aclcnt, acl); | |
2913 | return (err > 0) ? 0 : err; | |
2914 | } | |
2915 | ||
e4f93234 CL |
2916 | static inline int decode_getacl3resok(struct xdr_stream *xdr, |
2917 | struct nfs3_getaclres *result) | |
2918 | { | |
2919 | struct posix_acl **acl; | |
2920 | unsigned int *aclcnt; | |
2921 | size_t hdrlen; | |
2922 | int error; | |
2923 | ||
2924 | error = decode_post_op_attr(xdr, result->fattr); | |
2925 | if (unlikely(error)) | |
2926 | goto out; | |
2927 | error = decode_uint32(xdr, &result->mask); | |
2928 | if (unlikely(error)) | |
2929 | goto out; | |
2930 | error = -EINVAL; | |
2931 | if (result->mask & ~(NFS_ACL|NFS_ACLCNT|NFS_DFACL|NFS_DFACLCNT)) | |
2932 | goto out; | |
2933 | ||
2934 | hdrlen = (u8 *)xdr->p - (u8 *)xdr->iov->iov_base; | |
2935 | ||
2936 | acl = NULL; | |
2937 | if (result->mask & NFS_ACL) | |
2938 | acl = &result->acl_access; | |
2939 | aclcnt = NULL; | |
2940 | if (result->mask & NFS_ACLCNT) | |
2941 | aclcnt = &result->acl_access_count; | |
2942 | error = nfsacl_decode(xdr->buf, hdrlen, aclcnt, acl); | |
2943 | if (unlikely(error <= 0)) | |
2944 | goto out; | |
2945 | ||
2946 | acl = NULL; | |
2947 | if (result->mask & NFS_DFACL) | |
2948 | acl = &result->acl_default; | |
2949 | aclcnt = NULL; | |
2950 | if (result->mask & NFS_DFACLCNT) | |
2951 | aclcnt = &result->acl_default_count; | |
2952 | error = nfsacl_decode(xdr->buf, hdrlen + error, aclcnt, acl); | |
2953 | if (unlikely(error <= 0)) | |
2954 | return error; | |
2955 | error = 0; | |
2956 | out: | |
2957 | return error; | |
2958 | } | |
2959 | ||
2960 | static int nfs3_xdr_dec_getacl3res(struct rpc_rqst *req, __be32 *p, | |
2961 | struct nfs3_getaclres *result) | |
2962 | { | |
2963 | struct xdr_stream xdr; | |
2964 | enum nfs_stat status; | |
2965 | int error; | |
2966 | ||
2967 | xdr_init_decode(&xdr, &req->rq_rcv_buf, p); | |
2968 | error = decode_nfsstat3(&xdr, &status); | |
2969 | if (unlikely(error)) | |
2970 | goto out; | |
2971 | if (status != NFS3_OK) | |
2972 | goto out_default; | |
2973 | error = decode_getacl3resok(&xdr, result); | |
2974 | out: | |
2975 | return error; | |
2976 | out_default: | |
2977 | return nfs_stat_to_errno(status); | |
2978 | } | |
2979 | ||
b7fa0554 AG |
2980 | /* |
2981 | * Decode setacl reply. | |
2982 | */ | |
2983 | static int | |
d61005a6 | 2984 | nfs3_xdr_setaclres(struct rpc_rqst *req, __be32 *p, struct nfs_fattr *fattr) |
b7fa0554 AG |
2985 | { |
2986 | int status = ntohl(*p++); | |
2987 | ||
2988 | if (status) | |
856dff3d | 2989 | return nfs_stat_to_errno(status); |
b7fa0554 AG |
2990 | xdr_decode_post_op_attr(p, fattr); |
2991 | return 0; | |
2992 | } | |
e4f93234 CL |
2993 | |
2994 | static int nfs3_xdr_dec_setacl3res(struct rpc_rqst *req, __be32 *p, | |
2995 | struct nfs_fattr *result) | |
2996 | { | |
2997 | struct xdr_stream xdr; | |
2998 | enum nfs_stat status; | |
2999 | int error; | |
3000 | ||
3001 | xdr_init_decode(&xdr, &req->rq_rcv_buf, p); | |
3002 | error = decode_nfsstat3(&xdr, &status); | |
3003 | if (unlikely(error)) | |
3004 | goto out; | |
3005 | if (status != NFS3_OK) | |
3006 | goto out_default; | |
3007 | error = decode_post_op_attr(&xdr, result); | |
3008 | out: | |
3009 | return error; | |
3010 | out_default: | |
3011 | return nfs_stat_to_errno(status); | |
3012 | } | |
3013 | ||
b7fa0554 AG |
3014 | #endif /* CONFIG_NFS_V3_ACL */ |
3015 | ||
1da177e4 LT |
3016 | #define PROC(proc, argtype, restype, timer) \ |
3017 | [NFS3PROC_##proc] = { \ | |
3018 | .p_proc = NFS3PROC_##proc, \ | |
ad96b5b5 | 3019 | .p_encode = (kxdrproc_t)nfs3_xdr_enc_##argtype##3args, \ |
1da177e4 | 3020 | .p_decode = (kxdrproc_t) nfs3_xdr_##restype, \ |
ad96b5b5 | 3021 | .p_arglen = NFS3_##argtype##args_sz, \ |
2bea90d4 | 3022 | .p_replen = NFS3_##restype##_sz, \ |
cc0175c1 CL |
3023 | .p_timer = timer, \ |
3024 | .p_statidx = NFS3PROC_##proc, \ | |
3025 | .p_name = #proc, \ | |
1da177e4 LT |
3026 | } |
3027 | ||
3028 | struct rpc_procinfo nfs3_procedures[] = { | |
ad96b5b5 CL |
3029 | PROC(GETATTR, getattr, attrstat, 1), |
3030 | PROC(SETATTR, setattr, wccstat, 0), | |
3031 | PROC(LOOKUP, lookup, lookupres, 2), | |
3032 | PROC(ACCESS, access, accessres, 1), | |
3033 | PROC(READLINK, readlink, readlinkres, 3), | |
3034 | PROC(READ, read, readres, 3), | |
3035 | PROC(WRITE, write, writeres, 4), | |
3036 | PROC(CREATE, create, createres, 0), | |
3037 | PROC(MKDIR, mkdir, createres, 0), | |
3038 | PROC(SYMLINK, symlink, createres, 0), | |
3039 | PROC(MKNOD, mknod, createres, 0), | |
3040 | PROC(REMOVE, remove, removeres, 0), | |
3041 | PROC(RMDIR, lookup, wccstat, 0), | |
3042 | PROC(RENAME, rename, renameres, 0), | |
3043 | PROC(LINK, link, linkres, 0), | |
3044 | PROC(READDIR, readdir, readdirres, 3), | |
3045 | PROC(READDIRPLUS, readdirplus, readdirres, 3), | |
3046 | PROC(FSSTAT, getattr, fsstatres, 0), | |
3047 | PROC(FSINFO, getattr, fsinfores, 0), | |
3048 | PROC(PATHCONF, getattr, pathconfres, 0), | |
3049 | PROC(COMMIT, commit, commitres, 5), | |
1da177e4 LT |
3050 | }; |
3051 | ||
3052 | struct rpc_version nfs_version3 = { | |
3053 | .number = 3, | |
e8c96f8c | 3054 | .nrprocs = ARRAY_SIZE(nfs3_procedures), |
1da177e4 LT |
3055 | .procs = nfs3_procedures |
3056 | }; | |
3057 | ||
b7fa0554 AG |
3058 | #ifdef CONFIG_NFS_V3_ACL |
3059 | static struct rpc_procinfo nfs3_acl_procedures[] = { | |
3060 | [ACLPROC3_GETACL] = { | |
3061 | .p_proc = ACLPROC3_GETACL, | |
ad96b5b5 | 3062 | .p_encode = (kxdrproc_t)nfs3_xdr_enc_getacl3args, |
b7fa0554 | 3063 | .p_decode = (kxdrproc_t) nfs3_xdr_getaclres, |
2bea90d4 CL |
3064 | .p_arglen = ACL3_getaclargs_sz, |
3065 | .p_replen = ACL3_getaclres_sz, | |
b7fa0554 | 3066 | .p_timer = 1, |
cc0175c1 | 3067 | .p_name = "GETACL", |
b7fa0554 AG |
3068 | }, |
3069 | [ACLPROC3_SETACL] = { | |
3070 | .p_proc = ACLPROC3_SETACL, | |
ad96b5b5 | 3071 | .p_encode = (kxdrproc_t)nfs3_xdr_enc_setacl3args, |
b7fa0554 | 3072 | .p_decode = (kxdrproc_t) nfs3_xdr_setaclres, |
2bea90d4 CL |
3073 | .p_arglen = ACL3_setaclargs_sz, |
3074 | .p_replen = ACL3_setaclres_sz, | |
b7fa0554 | 3075 | .p_timer = 0, |
cc0175c1 | 3076 | .p_name = "SETACL", |
b7fa0554 AG |
3077 | }, |
3078 | }; | |
3079 | ||
3080 | struct rpc_version nfsacl_version3 = { | |
3081 | .number = 3, | |
3082 | .nrprocs = sizeof(nfs3_acl_procedures)/ | |
3083 | sizeof(nfs3_acl_procedures[0]), | |
3084 | .procs = nfs3_acl_procedures, | |
3085 | }; | |
3086 | #endif /* CONFIG_NFS_V3_ACL */ |