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-rw-r--r--fs/nfs/nfs3xdr.c2870
1 files changed, 2080 insertions, 790 deletions
diff --git a/fs/nfs/nfs3xdr.c b/fs/nfs/nfs3xdr.c
index 9769704f8ce6..183c6b123d0f 100644
--- a/fs/nfs/nfs3xdr.c
+++ b/fs/nfs/nfs3xdr.c
@@ -37,18 +37,16 @@
37#define NFS3_filename_sz (1+(NFS3_MAXNAMLEN>>2)) 37#define NFS3_filename_sz (1+(NFS3_MAXNAMLEN>>2))
38#define NFS3_path_sz (1+(NFS3_MAXPATHLEN>>2)) 38#define NFS3_path_sz (1+(NFS3_MAXPATHLEN>>2))
39#define NFS3_fattr_sz (21) 39#define NFS3_fattr_sz (21)
40#define NFS3_wcc_attr_sz (6) 40#define NFS3_cookieverf_sz (NFS3_COOKIEVERFSIZE>>2)
41#define NFS3_wcc_attr_sz (6)
41#define NFS3_pre_op_attr_sz (1+NFS3_wcc_attr_sz) 42#define NFS3_pre_op_attr_sz (1+NFS3_wcc_attr_sz)
42#define NFS3_post_op_attr_sz (1+NFS3_fattr_sz) 43#define NFS3_post_op_attr_sz (1+NFS3_fattr_sz)
43#define NFS3_wcc_data_sz (NFS3_pre_op_attr_sz+NFS3_post_op_attr_sz) 44#define NFS3_wcc_data_sz (NFS3_pre_op_attr_sz+NFS3_post_op_attr_sz)
44#define NFS3_fsstat_sz
45#define NFS3_fsinfo_sz
46#define NFS3_pathconf_sz
47#define NFS3_entry_sz (NFS3_filename_sz+3)
48
49#define NFS3_sattrargs_sz (NFS3_fh_sz+NFS3_sattr_sz+3)
50#define NFS3_diropargs_sz (NFS3_fh_sz+NFS3_filename_sz) 45#define NFS3_diropargs_sz (NFS3_fh_sz+NFS3_filename_sz)
51#define NFS3_removeargs_sz (NFS3_fh_sz+NFS3_filename_sz) 46
47#define NFS3_getattrargs_sz (NFS3_fh_sz)
48#define NFS3_setattrargs_sz (NFS3_fh_sz+NFS3_sattr_sz+3)
49#define NFS3_lookupargs_sz (NFS3_fh_sz+NFS3_filename_sz)
52#define NFS3_accessargs_sz (NFS3_fh_sz+1) 50#define NFS3_accessargs_sz (NFS3_fh_sz+1)
53#define NFS3_readlinkargs_sz (NFS3_fh_sz) 51#define NFS3_readlinkargs_sz (NFS3_fh_sz)
54#define NFS3_readargs_sz (NFS3_fh_sz+3) 52#define NFS3_readargs_sz (NFS3_fh_sz+3)
@@ -57,14 +55,16 @@
57#define NFS3_mkdirargs_sz (NFS3_diropargs_sz+NFS3_sattr_sz) 55#define NFS3_mkdirargs_sz (NFS3_diropargs_sz+NFS3_sattr_sz)
58#define NFS3_symlinkargs_sz (NFS3_diropargs_sz+1+NFS3_sattr_sz) 56#define NFS3_symlinkargs_sz (NFS3_diropargs_sz+1+NFS3_sattr_sz)
59#define NFS3_mknodargs_sz (NFS3_diropargs_sz+2+NFS3_sattr_sz) 57#define NFS3_mknodargs_sz (NFS3_diropargs_sz+2+NFS3_sattr_sz)
58#define NFS3_removeargs_sz (NFS3_fh_sz+NFS3_filename_sz)
60#define NFS3_renameargs_sz (NFS3_diropargs_sz+NFS3_diropargs_sz) 59#define NFS3_renameargs_sz (NFS3_diropargs_sz+NFS3_diropargs_sz)
61#define NFS3_linkargs_sz (NFS3_fh_sz+NFS3_diropargs_sz) 60#define NFS3_linkargs_sz (NFS3_fh_sz+NFS3_diropargs_sz)
62#define NFS3_readdirargs_sz (NFS3_fh_sz+2) 61#define NFS3_readdirargs_sz (NFS3_fh_sz+NFS3_cookieverf_sz+3)
62#define NFS3_readdirplusargs_sz (NFS3_fh_sz+NFS3_cookieverf_sz+4)
63#define NFS3_commitargs_sz (NFS3_fh_sz+3) 63#define NFS3_commitargs_sz (NFS3_fh_sz+3)
64 64
65#define NFS3_attrstat_sz (1+NFS3_fattr_sz) 65#define NFS3_getattrres_sz (1+NFS3_fattr_sz)
66#define NFS3_wccstat_sz (1+NFS3_wcc_data_sz) 66#define NFS3_setattrres_sz (1+NFS3_wcc_data_sz)
67#define NFS3_removeres_sz (NFS3_wccstat_sz) 67#define NFS3_removeres_sz (NFS3_setattrres_sz)
68#define NFS3_lookupres_sz (1+NFS3_fh_sz+(2 * NFS3_post_op_attr_sz)) 68#define NFS3_lookupres_sz (1+NFS3_fh_sz+(2 * NFS3_post_op_attr_sz))
69#define NFS3_accessres_sz (1+NFS3_post_op_attr_sz+1) 69#define NFS3_accessres_sz (1+NFS3_post_op_attr_sz+1)
70#define NFS3_readlinkres_sz (1+NFS3_post_op_attr_sz+1) 70#define NFS3_readlinkres_sz (1+NFS3_post_op_attr_sz+1)
@@ -101,1074 +101,2364 @@ static const umode_t nfs_type2fmt[] = {
101}; 101};
102 102
103/* 103/*
104 * Common NFS XDR functions as inlines 104 * While encoding arguments, set up the reply buffer in advance to
105 * receive reply data directly into the page cache.
105 */ 106 */
106static inline __be32 * 107static void prepare_reply_buffer(struct rpc_rqst *req, struct page **pages,
107xdr_encode_fhandle(__be32 *p, const struct nfs_fh *fh) 108 unsigned int base, unsigned int len,
109 unsigned int bufsize)
108{ 110{
109 return xdr_encode_array(p, fh->data, fh->size); 111 struct rpc_auth *auth = req->rq_cred->cr_auth;
112 unsigned int replen;
113
114 replen = RPC_REPHDRSIZE + auth->au_rslack + bufsize;
115 xdr_inline_pages(&req->rq_rcv_buf, replen << 2, pages, base, len);
110} 116}
111 117
112static inline __be32 * 118/*
113xdr_decode_fhandle(__be32 *p, struct nfs_fh *fh) 119 * Handle decode buffer overflows out-of-line.
120 */
121static void print_overflow_msg(const char *func, const struct xdr_stream *xdr)
114{ 122{
115 if ((fh->size = ntohl(*p++)) <= NFS3_FHSIZE) { 123 dprintk("NFS: %s prematurely hit the end of our receive buffer. "
116 memcpy(fh->data, p, fh->size); 124 "Remaining buffer length is %tu words.\n",
117 return p + XDR_QUADLEN(fh->size); 125 func, xdr->end - xdr->p);
118 }
119 return NULL;
120} 126}
121 127
128
122/* 129/*
123 * Encode/decode time. 130 * Encode/decode NFSv3 basic data types
131 *
132 * Basic NFSv3 data types are defined in section 2.5 of RFC 1813:
133 * "NFS Version 3 Protocol Specification".
134 *
135 * Not all basic data types have their own encoding and decoding
136 * functions. For run-time efficiency, some data types are encoded
137 * or decoded inline.
124 */ 138 */
125static inline __be32 * 139
126xdr_encode_time3(__be32 *p, struct timespec *timep) 140static void encode_uint32(struct xdr_stream *xdr, u32 value)
127{ 141{
128 *p++ = htonl(timep->tv_sec); 142 __be32 *p = xdr_reserve_space(xdr, 4);
129 *p++ = htonl(timep->tv_nsec); 143 *p = cpu_to_be32(value);
130 return p;
131} 144}
132 145
133static inline __be32 * 146static int decode_uint32(struct xdr_stream *xdr, u32 *value)
134xdr_decode_time3(__be32 *p, struct timespec *timep)
135{ 147{
136 timep->tv_sec = ntohl(*p++); 148 __be32 *p;
137 timep->tv_nsec = ntohl(*p++); 149
138 return p; 150 p = xdr_inline_decode(xdr, 4);
151 if (unlikely(p == NULL))
152 goto out_overflow;
153 *value = be32_to_cpup(p);
154 return 0;
155out_overflow:
156 print_overflow_msg(__func__, xdr);
157 return -EIO;
139} 158}
140 159
141static __be32 * 160static int decode_uint64(struct xdr_stream *xdr, u64 *value)
142xdr_decode_fattr(__be32 *p, struct nfs_fattr *fattr)
143{ 161{
144 unsigned int type, major, minor; 162 __be32 *p;
145 umode_t fmode;
146 163
147 type = ntohl(*p++); 164 p = xdr_inline_decode(xdr, 8);
148 if (type > NF3FIFO) 165 if (unlikely(p == NULL))
149 type = NF3NON; 166 goto out_overflow;
150 fmode = nfs_type2fmt[type]; 167 xdr_decode_hyper(p, value);
151 fattr->mode = (ntohl(*p++) & ~S_IFMT) | fmode; 168 return 0;
152 fattr->nlink = ntohl(*p++); 169out_overflow:
153 fattr->uid = ntohl(*p++); 170 print_overflow_msg(__func__, xdr);
154 fattr->gid = ntohl(*p++); 171 return -EIO;
155 p = xdr_decode_hyper(p, &fattr->size); 172}
156 p = xdr_decode_hyper(p, &fattr->du.nfs3.used);
157
158 /* Turn remote device info into Linux-specific dev_t */
159 major = ntohl(*p++);
160 minor = ntohl(*p++);
161 fattr->rdev = MKDEV(major, minor);
162 if (MAJOR(fattr->rdev) != major || MINOR(fattr->rdev) != minor)
163 fattr->rdev = 0;
164 173
165 p = xdr_decode_hyper(p, &fattr->fsid.major); 174/*
166 fattr->fsid.minor = 0; 175 * fileid3
167 p = xdr_decode_hyper(p, &fattr->fileid); 176 *
168 p = xdr_decode_time3(p, &fattr->atime); 177 * typedef uint64 fileid3;
169 p = xdr_decode_time3(p, &fattr->mtime); 178 */
170 p = xdr_decode_time3(p, &fattr->ctime); 179static __be32 *xdr_decode_fileid3(__be32 *p, u64 *fileid)
180{
181 return xdr_decode_hyper(p, fileid);
182}
171 183
172 /* Update the mode bits */ 184static int decode_fileid3(struct xdr_stream *xdr, u64 *fileid)
173 fattr->valid |= NFS_ATTR_FATTR_V3; 185{
174 return p; 186 return decode_uint64(xdr, fileid);
175} 187}
176 188
177static inline __be32 * 189/*
178xdr_encode_sattr(__be32 *p, struct iattr *attr) 190 * filename3
191 *
192 * typedef string filename3<>;
193 */
194static void encode_filename3(struct xdr_stream *xdr,
195 const char *name, u32 length)
179{ 196{
180 if (attr->ia_valid & ATTR_MODE) { 197 __be32 *p;
181 *p++ = xdr_one; 198
182 *p++ = htonl(attr->ia_mode & S_IALLUGO); 199 BUG_ON(length > NFS3_MAXNAMLEN);
183 } else { 200 p = xdr_reserve_space(xdr, 4 + length);
184 *p++ = xdr_zero; 201 xdr_encode_opaque(p, name, length);
185 }
186 if (attr->ia_valid & ATTR_UID) {
187 *p++ = xdr_one;
188 *p++ = htonl(attr->ia_uid);
189 } else {
190 *p++ = xdr_zero;
191 }
192 if (attr->ia_valid & ATTR_GID) {
193 *p++ = xdr_one;
194 *p++ = htonl(attr->ia_gid);
195 } else {
196 *p++ = xdr_zero;
197 }
198 if (attr->ia_valid & ATTR_SIZE) {
199 *p++ = xdr_one;
200 p = xdr_encode_hyper(p, (__u64) attr->ia_size);
201 } else {
202 *p++ = xdr_zero;
203 }
204 if (attr->ia_valid & ATTR_ATIME_SET) {
205 *p++ = xdr_two;
206 p = xdr_encode_time3(p, &attr->ia_atime);
207 } else if (attr->ia_valid & ATTR_ATIME) {
208 *p++ = xdr_one;
209 } else {
210 *p++ = xdr_zero;
211 }
212 if (attr->ia_valid & ATTR_MTIME_SET) {
213 *p++ = xdr_two;
214 p = xdr_encode_time3(p, &attr->ia_mtime);
215 } else if (attr->ia_valid & ATTR_MTIME) {
216 *p++ = xdr_one;
217 } else {
218 *p++ = xdr_zero;
219 }
220 return p;
221} 202}
222 203
223static inline __be32 * 204static int decode_inline_filename3(struct xdr_stream *xdr,
224xdr_decode_wcc_attr(__be32 *p, struct nfs_fattr *fattr) 205 const char **name, u32 *length)
225{ 206{
226 p = xdr_decode_hyper(p, &fattr->pre_size); 207 __be32 *p;
227 p = xdr_decode_time3(p, &fattr->pre_mtime); 208 u32 count;
228 p = xdr_decode_time3(p, &fattr->pre_ctime); 209
229 fattr->valid |= NFS_ATTR_FATTR_PRESIZE 210 p = xdr_inline_decode(xdr, 4);
230 | NFS_ATTR_FATTR_PREMTIME 211 if (unlikely(p == NULL))
231 | NFS_ATTR_FATTR_PRECTIME; 212 goto out_overflow;
232 return p; 213 count = be32_to_cpup(p);
214 if (count > NFS3_MAXNAMLEN)
215 goto out_nametoolong;
216 p = xdr_inline_decode(xdr, count);
217 if (unlikely(p == NULL))
218 goto out_overflow;
219 *name = (const char *)p;
220 *length = count;
221 return 0;
222
223out_nametoolong:
224 dprintk("NFS: returned filename too long: %u\n", count);
225 return -ENAMETOOLONG;
226out_overflow:
227 print_overflow_msg(__func__, xdr);
228 return -EIO;
233} 229}
234 230
235static inline __be32 * 231/*
236xdr_decode_post_op_attr(__be32 *p, struct nfs_fattr *fattr) 232 * nfspath3
233 *
234 * typedef string nfspath3<>;
235 */
236static void encode_nfspath3(struct xdr_stream *xdr, struct page **pages,
237 const u32 length)
237{ 238{
238 if (*p++) 239 BUG_ON(length > NFS3_MAXPATHLEN);
239 p = xdr_decode_fattr(p, fattr); 240 encode_uint32(xdr, length);
240 return p; 241 xdr_write_pages(xdr, pages, 0, length);
241} 242}
242 243
243static inline __be32 * 244static int decode_nfspath3(struct xdr_stream *xdr)
244xdr_decode_pre_op_attr(__be32 *p, struct nfs_fattr *fattr)
245{ 245{
246 if (*p++) 246 u32 recvd, count;
247 return xdr_decode_wcc_attr(p, fattr); 247 size_t hdrlen;
248 return p; 248 __be32 *p;
249
250 p = xdr_inline_decode(xdr, 4);
251 if (unlikely(p == NULL))
252 goto out_overflow;
253 count = be32_to_cpup(p);
254 if (unlikely(count >= xdr->buf->page_len || count > NFS3_MAXPATHLEN))
255 goto out_nametoolong;
256 hdrlen = (u8 *)xdr->p - (u8 *)xdr->iov->iov_base;
257 recvd = xdr->buf->len - hdrlen;
258 if (unlikely(count > recvd))
259 goto out_cheating;
260
261 xdr_read_pages(xdr, count);
262 xdr_terminate_string(xdr->buf, count);
263 return 0;
264
265out_nametoolong:
266 dprintk("NFS: returned pathname too long: %u\n", count);
267 return -ENAMETOOLONG;
268out_cheating:
269 dprintk("NFS: server cheating in pathname result: "
270 "count %u > recvd %u\n", count, recvd);
271 return -EIO;
272out_overflow:
273 print_overflow_msg(__func__, xdr);
274 return -EIO;
249} 275}
250 276
277/*
278 * cookie3
279 *
280 * typedef uint64 cookie3
281 */
282static __be32 *xdr_encode_cookie3(__be32 *p, u64 cookie)
283{
284 return xdr_encode_hyper(p, cookie);
285}
251 286
252static inline __be32 * 287static int decode_cookie3(struct xdr_stream *xdr, u64 *cookie)
253xdr_decode_wcc_data(__be32 *p, struct nfs_fattr *fattr)
254{ 288{
255 p = xdr_decode_pre_op_attr(p, fattr); 289 return decode_uint64(xdr, cookie);
256 return xdr_decode_post_op_attr(p, fattr);
257} 290}
258 291
259/* 292/*
260 * NFS encode functions 293 * cookieverf3
294 *
295 * typedef opaque cookieverf3[NFS3_COOKIEVERFSIZE];
261 */ 296 */
297static __be32 *xdr_encode_cookieverf3(__be32 *p, const __be32 *verifier)
298{
299 memcpy(p, verifier, NFS3_COOKIEVERFSIZE);
300 return p + XDR_QUADLEN(NFS3_COOKIEVERFSIZE);
301}
302
303static int decode_cookieverf3(struct xdr_stream *xdr, __be32 *verifier)
304{
305 __be32 *p;
306
307 p = xdr_inline_decode(xdr, NFS3_COOKIEVERFSIZE);
308 if (unlikely(p == NULL))
309 goto out_overflow;
310 memcpy(verifier, p, NFS3_COOKIEVERFSIZE);
311 return 0;
312out_overflow:
313 print_overflow_msg(__func__, xdr);
314 return -EIO;
315}
262 316
263/* 317/*
264 * Encode file handle argument 318 * createverf3
319 *
320 * typedef opaque createverf3[NFS3_CREATEVERFSIZE];
265 */ 321 */
266static int 322static void encode_createverf3(struct xdr_stream *xdr, const __be32 *verifier)
267nfs3_xdr_fhandle(struct rpc_rqst *req, __be32 *p, struct nfs_fh *fh)
268{ 323{
269 p = xdr_encode_fhandle(p, fh); 324 __be32 *p;
270 req->rq_slen = xdr_adjust_iovec(req->rq_svec, p); 325
326 p = xdr_reserve_space(xdr, NFS3_CREATEVERFSIZE);
327 memcpy(p, verifier, NFS3_CREATEVERFSIZE);
328}
329
330static int decode_writeverf3(struct xdr_stream *xdr, __be32 *verifier)
331{
332 __be32 *p;
333
334 p = xdr_inline_decode(xdr, NFS3_WRITEVERFSIZE);
335 if (unlikely(p == NULL))
336 goto out_overflow;
337 memcpy(verifier, p, NFS3_WRITEVERFSIZE);
271 return 0; 338 return 0;
339out_overflow:
340 print_overflow_msg(__func__, xdr);
341 return -EIO;
272} 342}
273 343
274/* 344/*
275 * Encode SETATTR arguments 345 * size3
346 *
347 * typedef uint64 size3;
276 */ 348 */
277static int 349static __be32 *xdr_decode_size3(__be32 *p, u64 *size)
278nfs3_xdr_sattrargs(struct rpc_rqst *req, __be32 *p, struct nfs3_sattrargs *args) 350{
279{ 351 return xdr_decode_hyper(p, size);
280 p = xdr_encode_fhandle(p, args->fh);
281 p = xdr_encode_sattr(p, args->sattr);
282 *p++ = htonl(args->guard);
283 if (args->guard)
284 p = xdr_encode_time3(p, &args->guardtime);
285 req->rq_slen = xdr_adjust_iovec(req->rq_svec, p);
286 return 0;
287} 352}
288 353
289/* 354/*
290 * Encode directory ops argument 355 * nfsstat3
356 *
357 * enum nfsstat3 {
358 * NFS3_OK = 0,
359 * ...
360 * }
291 */ 361 */
292static int 362#define NFS3_OK NFS_OK
293nfs3_xdr_diropargs(struct rpc_rqst *req, __be32 *p, struct nfs3_diropargs *args) 363
364static int decode_nfsstat3(struct xdr_stream *xdr, enum nfs_stat *status)
294{ 365{
295 p = xdr_encode_fhandle(p, args->fh); 366 __be32 *p;
296 p = xdr_encode_array(p, args->name, args->len); 367
297 req->rq_slen = xdr_adjust_iovec(req->rq_svec, p); 368 p = xdr_inline_decode(xdr, 4);
369 if (unlikely(p == NULL))
370 goto out_overflow;
371 *status = be32_to_cpup(p);
298 return 0; 372 return 0;
373out_overflow:
374 print_overflow_msg(__func__, xdr);
375 return -EIO;
299} 376}
300 377
301/* 378/*
302 * Encode REMOVE argument 379 * ftype3
380 *
381 * enum ftype3 {
382 * NF3REG = 1,
383 * NF3DIR = 2,
384 * NF3BLK = 3,
385 * NF3CHR = 4,
386 * NF3LNK = 5,
387 * NF3SOCK = 6,
388 * NF3FIFO = 7
389 * };
303 */ 390 */
304static int 391static void encode_ftype3(struct xdr_stream *xdr, const u32 type)
305nfs3_xdr_removeargs(struct rpc_rqst *req, __be32 *p, const struct nfs_removeargs *args)
306{ 392{
307 p = xdr_encode_fhandle(p, args->fh); 393 BUG_ON(type > NF3FIFO);
308 p = xdr_encode_array(p, args->name.name, args->name.len); 394 encode_uint32(xdr, type);
309 req->rq_slen = xdr_adjust_iovec(req->rq_svec, p); 395}
310 return 0; 396
397static __be32 *xdr_decode_ftype3(__be32 *p, umode_t *mode)
398{
399 u32 type;
400
401 type = be32_to_cpup(p++);
402 if (type > NF3FIFO)
403 type = NF3NON;
404 *mode = nfs_type2fmt[type];
405 return p;
311} 406}
312 407
313/* 408/*
314 * Encode access() argument 409 * specdata3
410 *
411 * struct specdata3 {
412 * uint32 specdata1;
413 * uint32 specdata2;
414 * };
315 */ 415 */
316static int 416static void encode_specdata3(struct xdr_stream *xdr, const dev_t rdev)
317nfs3_xdr_accessargs(struct rpc_rqst *req, __be32 *p, struct nfs3_accessargs *args)
318{ 417{
319 p = xdr_encode_fhandle(p, args->fh); 418 __be32 *p;
320 *p++ = htonl(args->access); 419
321 req->rq_slen = xdr_adjust_iovec(req->rq_svec, p); 420 p = xdr_reserve_space(xdr, 8);
322 return 0; 421 *p++ = cpu_to_be32(MAJOR(rdev));
422 *p = cpu_to_be32(MINOR(rdev));
423}
424
425static __be32 *xdr_decode_specdata3(__be32 *p, dev_t *rdev)
426{
427 unsigned int major, minor;
428
429 major = be32_to_cpup(p++);
430 minor = be32_to_cpup(p++);
431 *rdev = MKDEV(major, minor);
432 if (MAJOR(*rdev) != major || MINOR(*rdev) != minor)
433 *rdev = 0;
434 return p;
323} 435}
324 436
325/* 437/*
326 * Arguments to a READ call. Since we read data directly into the page 438 * nfs_fh3
327 * cache, we also set up the reply iovec here so that iov[1] points 439 *
328 * exactly to the page we want to fetch. 440 * struct nfs_fh3 {
441 * opaque data<NFS3_FHSIZE>;
442 * };
329 */ 443 */
330static int 444static void encode_nfs_fh3(struct xdr_stream *xdr, const struct nfs_fh *fh)
331nfs3_xdr_readargs(struct rpc_rqst *req, __be32 *p, struct nfs_readargs *args)
332{ 445{
333 struct rpc_auth *auth = req->rq_cred->cr_auth; 446 __be32 *p;
334 unsigned int replen;
335 u32 count = args->count;
336 447
337 p = xdr_encode_fhandle(p, args->fh); 448 BUG_ON(fh->size > NFS3_FHSIZE);
338 p = xdr_encode_hyper(p, args->offset); 449 p = xdr_reserve_space(xdr, 4 + fh->size);
339 *p++ = htonl(count); 450 xdr_encode_opaque(p, fh->data, fh->size);
340 req->rq_slen = xdr_adjust_iovec(req->rq_svec, p); 451}
341 452
342 /* Inline the page array */ 453static int decode_nfs_fh3(struct xdr_stream *xdr, struct nfs_fh *fh)
343 replen = (RPC_REPHDRSIZE + auth->au_rslack + NFS3_readres_sz) << 2; 454{
344 xdr_inline_pages(&req->rq_rcv_buf, replen, 455 u32 length;
345 args->pages, args->pgbase, count); 456 __be32 *p;
346 req->rq_rcv_buf.flags |= XDRBUF_READ; 457
458 p = xdr_inline_decode(xdr, 4);
459 if (unlikely(p == NULL))
460 goto out_overflow;
461 length = be32_to_cpup(p++);
462 if (unlikely(length > NFS3_FHSIZE))
463 goto out_toobig;
464 p = xdr_inline_decode(xdr, length);
465 if (unlikely(p == NULL))
466 goto out_overflow;
467 fh->size = length;
468 memcpy(fh->data, p, length);
347 return 0; 469 return 0;
470out_toobig:
471 dprintk("NFS: file handle size (%u) too big\n", length);
472 return -E2BIG;
473out_overflow:
474 print_overflow_msg(__func__, xdr);
475 return -EIO;
476}
477
478static void zero_nfs_fh3(struct nfs_fh *fh)
479{
480 memset(fh, 0, sizeof(*fh));
348} 481}
349 482
350/* 483/*
351 * Write arguments. Splice the buffer to be written into the iovec. 484 * nfstime3
485 *
486 * struct nfstime3 {
487 * uint32 seconds;
488 * uint32 nseconds;
489 * };
352 */ 490 */
353static int 491static __be32 *xdr_encode_nfstime3(__be32 *p, const struct timespec *timep)
354nfs3_xdr_writeargs(struct rpc_rqst *req, __be32 *p, struct nfs_writeargs *args)
355{ 492{
356 struct xdr_buf *sndbuf = &req->rq_snd_buf; 493 *p++ = cpu_to_be32(timep->tv_sec);
357 u32 count = args->count; 494 *p++ = cpu_to_be32(timep->tv_nsec);
495 return p;
496}
358 497
359 p = xdr_encode_fhandle(p, args->fh); 498static __be32 *xdr_decode_nfstime3(__be32 *p, struct timespec *timep)
360 p = xdr_encode_hyper(p, args->offset); 499{
361 *p++ = htonl(count); 500 timep->tv_sec = be32_to_cpup(p++);
362 *p++ = htonl(args->stable); 501 timep->tv_nsec = be32_to_cpup(p++);
363 *p++ = htonl(count); 502 return p;
364 sndbuf->len = xdr_adjust_iovec(sndbuf->head, p);
365
366 /* Copy the page array */
367 xdr_encode_pages(sndbuf, args->pages, args->pgbase, count);
368 sndbuf->flags |= XDRBUF_WRITE;
369 return 0;
370} 503}
371 504
372/* 505/*
373 * Encode CREATE arguments 506 * sattr3
507 *
508 * enum time_how {
509 * DONT_CHANGE = 0,
510 * SET_TO_SERVER_TIME = 1,
511 * SET_TO_CLIENT_TIME = 2
512 * };
513 *
514 * union set_mode3 switch (bool set_it) {
515 * case TRUE:
516 * mode3 mode;
517 * default:
518 * void;
519 * };
520 *
521 * union set_uid3 switch (bool set_it) {
522 * case TRUE:
523 * uid3 uid;
524 * default:
525 * void;
526 * };
527 *
528 * union set_gid3 switch (bool set_it) {
529 * case TRUE:
530 * gid3 gid;
531 * default:
532 * void;
533 * };
534 *
535 * union set_size3 switch (bool set_it) {
536 * case TRUE:
537 * size3 size;
538 * default:
539 * void;
540 * };
541 *
542 * union set_atime switch (time_how set_it) {
543 * case SET_TO_CLIENT_TIME:
544 * nfstime3 atime;
545 * default:
546 * void;
547 * };
548 *
549 * union set_mtime switch (time_how set_it) {
550 * case SET_TO_CLIENT_TIME:
551 * nfstime3 mtime;
552 * default:
553 * void;
554 * };
555 *
556 * struct sattr3 {
557 * set_mode3 mode;
558 * set_uid3 uid;
559 * set_gid3 gid;
560 * set_size3 size;
561 * set_atime atime;
562 * set_mtime mtime;
563 * };
374 */ 564 */
375static int 565static void encode_sattr3(struct xdr_stream *xdr, const struct iattr *attr)
376nfs3_xdr_createargs(struct rpc_rqst *req, __be32 *p, struct nfs3_createargs *args)
377{ 566{
378 p = xdr_encode_fhandle(p, args->fh); 567 u32 nbytes;
379 p = xdr_encode_array(p, args->name, args->len); 568 __be32 *p;
380 569
381 *p++ = htonl(args->createmode); 570 /*
382 if (args->createmode == NFS3_CREATE_EXCLUSIVE) { 571 * In order to make only a single xdr_reserve_space() call,
383 *p++ = args->verifier[0]; 572 * pre-compute the total number of bytes to be reserved.
384 *p++ = args->verifier[1]; 573 * Six boolean values, one for each set_foo field, are always
574 * present in the encoded result, so start there.
575 */
576 nbytes = 6 * 4;
577 if (attr->ia_valid & ATTR_MODE)
578 nbytes += 4;
579 if (attr->ia_valid & ATTR_UID)
580 nbytes += 4;
581 if (attr->ia_valid & ATTR_GID)
582 nbytes += 4;
583 if (attr->ia_valid & ATTR_SIZE)
584 nbytes += 8;
585 if (attr->ia_valid & ATTR_ATIME_SET)
586 nbytes += 8;
587 if (attr->ia_valid & ATTR_MTIME_SET)
588 nbytes += 8;
589 p = xdr_reserve_space(xdr, nbytes);
590
591 if (attr->ia_valid & ATTR_MODE) {
592 *p++ = xdr_one;
593 *p++ = cpu_to_be32(attr->ia_mode & S_IALLUGO);
385 } else 594 } else
386 p = xdr_encode_sattr(p, args->sattr); 595 *p++ = xdr_zero;
387 596
388 req->rq_slen = xdr_adjust_iovec(req->rq_svec, p); 597 if (attr->ia_valid & ATTR_UID) {
389 return 0; 598 *p++ = xdr_one;
599 *p++ = cpu_to_be32(attr->ia_uid);
600 } else
601 *p++ = xdr_zero;
602
603 if (attr->ia_valid & ATTR_GID) {
604 *p++ = xdr_one;
605 *p++ = cpu_to_be32(attr->ia_gid);
606 } else
607 *p++ = xdr_zero;
608
609 if (attr->ia_valid & ATTR_SIZE) {
610 *p++ = xdr_one;
611 p = xdr_encode_hyper(p, (u64)attr->ia_size);
612 } else
613 *p++ = xdr_zero;
614
615 if (attr->ia_valid & ATTR_ATIME_SET) {
616 *p++ = xdr_two;
617 p = xdr_encode_nfstime3(p, &attr->ia_atime);
618 } else if (attr->ia_valid & ATTR_ATIME) {
619 *p++ = xdr_one;
620 } else
621 *p++ = xdr_zero;
622
623 if (attr->ia_valid & ATTR_MTIME_SET) {
624 *p++ = xdr_two;
625 xdr_encode_nfstime3(p, &attr->ia_mtime);
626 } else if (attr->ia_valid & ATTR_MTIME) {
627 *p = xdr_one;
628 } else
629 *p = xdr_zero;
390} 630}
391 631
392/* 632/*
393 * Encode MKDIR arguments 633 * fattr3
634 *
635 * struct fattr3 {
636 * ftype3 type;
637 * mode3 mode;
638 * uint32 nlink;
639 * uid3 uid;
640 * gid3 gid;
641 * size3 size;
642 * size3 used;
643 * specdata3 rdev;
644 * uint64 fsid;
645 * fileid3 fileid;
646 * nfstime3 atime;
647 * nfstime3 mtime;
648 * nfstime3 ctime;
649 * };
394 */ 650 */
395static int 651static int decode_fattr3(struct xdr_stream *xdr, struct nfs_fattr *fattr)
396nfs3_xdr_mkdirargs(struct rpc_rqst *req, __be32 *p, struct nfs3_mkdirargs *args)
397{ 652{
398 p = xdr_encode_fhandle(p, args->fh); 653 umode_t fmode;
399 p = xdr_encode_array(p, args->name, args->len); 654 __be32 *p;
400 p = xdr_encode_sattr(p, args->sattr); 655
401 req->rq_slen = xdr_adjust_iovec(req->rq_svec, p); 656 p = xdr_inline_decode(xdr, NFS3_fattr_sz << 2);
657 if (unlikely(p == NULL))
658 goto out_overflow;
659
660 p = xdr_decode_ftype3(p, &fmode);
661
662 fattr->mode = (be32_to_cpup(p++) & ~S_IFMT) | fmode;
663 fattr->nlink = be32_to_cpup(p++);
664 fattr->uid = be32_to_cpup(p++);
665 fattr->gid = be32_to_cpup(p++);
666
667 p = xdr_decode_size3(p, &fattr->size);
668 p = xdr_decode_size3(p, &fattr->du.nfs3.used);
669 p = xdr_decode_specdata3(p, &fattr->rdev);
670
671 p = xdr_decode_hyper(p, &fattr->fsid.major);
672 fattr->fsid.minor = 0;
673
674 p = xdr_decode_fileid3(p, &fattr->fileid);
675 p = xdr_decode_nfstime3(p, &fattr->atime);
676 p = xdr_decode_nfstime3(p, &fattr->mtime);
677 xdr_decode_nfstime3(p, &fattr->ctime);
678
679 fattr->valid |= NFS_ATTR_FATTR_V3;
402 return 0; 680 return 0;
681out_overflow:
682 print_overflow_msg(__func__, xdr);
683 return -EIO;
403} 684}
404 685
405/* 686/*
406 * Encode SYMLINK arguments 687 * post_op_attr
688 *
689 * union post_op_attr switch (bool attributes_follow) {
690 * case TRUE:
691 * fattr3 attributes;
692 * case FALSE:
693 * void;
694 * };
407 */ 695 */
408static int 696static int decode_post_op_attr(struct xdr_stream *xdr, struct nfs_fattr *fattr)
409nfs3_xdr_symlinkargs(struct rpc_rqst *req, __be32 *p, struct nfs3_symlinkargs *args)
410{ 697{
411 p = xdr_encode_fhandle(p, args->fromfh); 698 __be32 *p;
412 p = xdr_encode_array(p, args->fromname, args->fromlen);
413 p = xdr_encode_sattr(p, args->sattr);
414 *p++ = htonl(args->pathlen);
415 req->rq_slen = xdr_adjust_iovec(req->rq_svec, p);
416 699
417 /* Copy the page */ 700 p = xdr_inline_decode(xdr, 4);
418 xdr_encode_pages(&req->rq_snd_buf, args->pages, 0, args->pathlen); 701 if (unlikely(p == NULL))
702 goto out_overflow;
703 if (*p != xdr_zero)
704 return decode_fattr3(xdr, fattr);
419 return 0; 705 return 0;
706out_overflow:
707 print_overflow_msg(__func__, xdr);
708 return -EIO;
420} 709}
421 710
422/* 711/*
423 * Encode MKNOD arguments 712 * wcc_attr
713 * struct wcc_attr {
714 * size3 size;
715 * nfstime3 mtime;
716 * nfstime3 ctime;
717 * };
424 */ 718 */
425static int 719static int decode_wcc_attr(struct xdr_stream *xdr, struct nfs_fattr *fattr)
426nfs3_xdr_mknodargs(struct rpc_rqst *req, __be32 *p, struct nfs3_mknodargs *args) 720{
427{ 721 __be32 *p;
428 p = xdr_encode_fhandle(p, args->fh); 722
429 p = xdr_encode_array(p, args->name, args->len); 723 p = xdr_inline_decode(xdr, NFS3_wcc_attr_sz << 2);
430 *p++ = htonl(args->type); 724 if (unlikely(p == NULL))
431 p = xdr_encode_sattr(p, args->sattr); 725 goto out_overflow;
432 if (args->type == NF3CHR || args->type == NF3BLK) { 726
433 *p++ = htonl(MAJOR(args->rdev)); 727 fattr->valid |= NFS_ATTR_FATTR_PRESIZE
434 *p++ = htonl(MINOR(args->rdev)); 728 | NFS_ATTR_FATTR_PREMTIME
435 } 729 | NFS_ATTR_FATTR_PRECTIME;
730
731 p = xdr_decode_size3(p, &fattr->pre_size);
732 p = xdr_decode_nfstime3(p, &fattr->pre_mtime);
733 xdr_decode_nfstime3(p, &fattr->pre_ctime);
436 734
437 req->rq_slen = xdr_adjust_iovec(req->rq_svec, p);
438 return 0; 735 return 0;
736out_overflow:
737 print_overflow_msg(__func__, xdr);
738 return -EIO;
439} 739}
440 740
441/* 741/*
442 * Encode RENAME arguments 742 * pre_op_attr
743 * union pre_op_attr switch (bool attributes_follow) {
744 * case TRUE:
745 * wcc_attr attributes;
746 * case FALSE:
747 * void;
748 * };
749 *
750 * wcc_data
751 *
752 * struct wcc_data {
753 * pre_op_attr before;
754 * post_op_attr after;
755 * };
443 */ 756 */
444static int 757static int decode_pre_op_attr(struct xdr_stream *xdr, struct nfs_fattr *fattr)
445nfs3_xdr_renameargs(struct rpc_rqst *req, __be32 *p, struct nfs3_renameargs *args) 758{
446{ 759 __be32 *p;
447 p = xdr_encode_fhandle(p, args->fromfh); 760
448 p = xdr_encode_array(p, args->fromname, args->fromlen); 761 p = xdr_inline_decode(xdr, 4);
449 p = xdr_encode_fhandle(p, args->tofh); 762 if (unlikely(p == NULL))
450 p = xdr_encode_array(p, args->toname, args->tolen); 763 goto out_overflow;
451 req->rq_slen = xdr_adjust_iovec(req->rq_svec, p); 764 if (*p != xdr_zero)
765 return decode_wcc_attr(xdr, fattr);
452 return 0; 766 return 0;
767out_overflow:
768 print_overflow_msg(__func__, xdr);
769 return -EIO;
453} 770}
454 771
455/* 772static int decode_wcc_data(struct xdr_stream *xdr, struct nfs_fattr *fattr)
456 * Encode LINK arguments
457 */
458static int
459nfs3_xdr_linkargs(struct rpc_rqst *req, __be32 *p, struct nfs3_linkargs *args)
460{ 773{
461 p = xdr_encode_fhandle(p, args->fromfh); 774 int error;
462 p = xdr_encode_fhandle(p, args->tofh); 775
463 p = xdr_encode_array(p, args->toname, args->tolen); 776 error = decode_pre_op_attr(xdr, fattr);
464 req->rq_slen = xdr_adjust_iovec(req->rq_svec, p); 777 if (unlikely(error))
465 return 0; 778 goto out;
779 error = decode_post_op_attr(xdr, fattr);
780out:
781 return error;
466} 782}
467 783
468/* 784/*
469 * Encode arguments to readdir call 785 * post_op_fh3
786 *
787 * union post_op_fh3 switch (bool handle_follows) {
788 * case TRUE:
789 * nfs_fh3 handle;
790 * case FALSE:
791 * void;
792 * };
470 */ 793 */
471static int 794static int decode_post_op_fh3(struct xdr_stream *xdr, struct nfs_fh *fh)
472nfs3_xdr_readdirargs(struct rpc_rqst *req, __be32 *p, struct nfs3_readdirargs *args)
473{ 795{
474 struct rpc_auth *auth = req->rq_cred->cr_auth; 796 __be32 *p = xdr_inline_decode(xdr, 4);
475 unsigned int replen; 797 if (unlikely(p == NULL))
476 u32 count = args->count; 798 goto out_overflow;
477 799 if (*p != xdr_zero)
478 p = xdr_encode_fhandle(p, args->fh); 800 return decode_nfs_fh3(xdr, fh);
479 p = xdr_encode_hyper(p, args->cookie); 801 zero_nfs_fh3(fh);
480 *p++ = args->verf[0];
481 *p++ = args->verf[1];
482 if (args->plus) {
483 /* readdirplus: need dircount + buffer size.
484 * We just make sure we make dircount big enough */
485 *p++ = htonl(count >> 3);
486 }
487 *p++ = htonl(count);
488 req->rq_slen = xdr_adjust_iovec(req->rq_svec, p);
489
490 /* Inline the page array */
491 replen = (RPC_REPHDRSIZE + auth->au_rslack + NFS3_readdirres_sz) << 2;
492 xdr_inline_pages(&req->rq_rcv_buf, replen, args->pages, 0, count);
493 return 0; 802 return 0;
803out_overflow:
804 print_overflow_msg(__func__, xdr);
805 return -EIO;
494} 806}
495 807
496/* 808/*
497 * Decode the result of a readdir call. 809 * diropargs3
498 * We just check for syntactical correctness. 810 *
811 * struct diropargs3 {
812 * nfs_fh3 dir;
813 * filename3 name;
814 * };
499 */ 815 */
500static int 816static void encode_diropargs3(struct xdr_stream *xdr, const struct nfs_fh *fh,
501nfs3_xdr_readdirres(struct rpc_rqst *req, __be32 *p, struct nfs3_readdirres *res) 817 const char *name, u32 length)
502{ 818{
503 struct xdr_buf *rcvbuf = &req->rq_rcv_buf; 819 encode_nfs_fh3(xdr, fh);
504 struct kvec *iov = rcvbuf->head; 820 encode_filename3(xdr, name, length);
505 struct page **page; 821}
506 size_t hdrlen;
507 u32 len, recvd, pglen;
508 int status, nr = 0;
509 __be32 *entry, *end, *kaddr;
510
511 status = ntohl(*p++);
512 /* Decode post_op_attrs */
513 p = xdr_decode_post_op_attr(p, res->dir_attr);
514 if (status)
515 return nfs_stat_to_errno(status);
516 /* Decode verifier cookie */
517 if (res->verf) {
518 res->verf[0] = *p++;
519 res->verf[1] = *p++;
520 } else {
521 p += 2;
522 }
523
524 hdrlen = (u8 *) p - (u8 *) iov->iov_base;
525 if (iov->iov_len < hdrlen) {
526 dprintk("NFS: READDIR reply header overflowed:"
527 "length %Zu > %Zu\n", hdrlen, iov->iov_len);
528 return -errno_NFSERR_IO;
529 } else if (iov->iov_len != hdrlen) {
530 dprintk("NFS: READDIR header is short. iovec will be shifted.\n");
531 xdr_shift_buf(rcvbuf, iov->iov_len - hdrlen);
532 }
533 822
534 pglen = rcvbuf->page_len;
535 recvd = rcvbuf->len - hdrlen;
536 if (pglen > recvd)
537 pglen = recvd;
538 page = rcvbuf->pages;
539 kaddr = p = kmap_atomic(*page, KM_USER0);
540 end = (__be32 *)((char *)p + pglen);
541 entry = p;
542
543 /* Make sure the packet actually has a value_follows and EOF entry */
544 if ((entry + 1) > end)
545 goto short_pkt;
546
547 for (; *p++; nr++) {
548 if (p + 3 > end)
549 goto short_pkt;
550 p += 2; /* inode # */
551 len = ntohl(*p++); /* string length */
552 p += XDR_QUADLEN(len) + 2; /* name + cookie */
553 if (len > NFS3_MAXNAMLEN) {
554 dprintk("NFS: giant filename in readdir (len 0x%x)!\n",
555 len);
556 goto err_unmap;
557 }
558
559 if (res->plus) {
560 /* post_op_attr */
561 if (p + 2 > end)
562 goto short_pkt;
563 if (*p++) {
564 p += 21;
565 if (p + 1 > end)
566 goto short_pkt;
567 }
568 /* post_op_fh3 */
569 if (*p++) {
570 if (p + 1 > end)
571 goto short_pkt;
572 len = ntohl(*p++);
573 if (len > NFS3_FHSIZE) {
574 dprintk("NFS: giant filehandle in "
575 "readdir (len 0x%x)!\n", len);
576 goto err_unmap;
577 }
578 p += XDR_QUADLEN(len);
579 }
580 }
581 823
582 if (p + 2 > end) 824/*
583 goto short_pkt; 825 * NFSv3 XDR encode functions
584 entry = p; 826 *
585 } 827 * NFSv3 argument types are defined in section 3.3 of RFC 1813:
828 * "NFS Version 3 Protocol Specification".
829 */
586 830
587 /* 831/*
588 * Apparently some server sends responses that are a valid size, but 832 * 3.3.1 GETATTR3args
589 * contain no entries, and have value_follows==0 and EOF==0. For 833 *
590 * those, just set the EOF marker. 834 * struct GETATTR3args {
591 */ 835 * nfs_fh3 object;
592 if (!nr && entry[1] == 0) { 836 * };
593 dprintk("NFS: readdir reply truncated!\n"); 837 */
594 entry[1] = 1; 838static void nfs3_xdr_enc_getattr3args(struct rpc_rqst *req,
595 } 839 struct xdr_stream *xdr,
596 out: 840 const struct nfs_fh *fh)
597 kunmap_atomic(kaddr, KM_USER0); 841{
598 return nr; 842 encode_nfs_fh3(xdr, fh);
599 short_pkt:
600 /*
601 * When we get a short packet there are 2 possibilities. We can
602 * return an error, or fix up the response to look like a valid
603 * response and return what we have so far. If there are no
604 * entries and the packet was short, then return -EIO. If there
605 * are valid entries in the response, return them and pretend that
606 * the call was successful, but incomplete. The caller can retry the
607 * readdir starting at the last cookie.
608 */
609 entry[0] = entry[1] = 0;
610 if (!nr)
611 nr = -errno_NFSERR_IO;
612 goto out;
613err_unmap:
614 nr = -errno_NFSERR_IO;
615 goto out;
616} 843}
617 844
618__be32 * 845/*
619nfs3_decode_dirent(__be32 *p, struct nfs_entry *entry, int plus) 846 * 3.3.2 SETATTR3args
847 *
848 * union sattrguard3 switch (bool check) {
849 * case TRUE:
850 * nfstime3 obj_ctime;
851 * case FALSE:
852 * void;
853 * };
854 *
855 * struct SETATTR3args {
856 * nfs_fh3 object;
857 * sattr3 new_attributes;
858 * sattrguard3 guard;
859 * };
860 */
861static void encode_sattrguard3(struct xdr_stream *xdr,
862 const struct nfs3_sattrargs *args)
620{ 863{
621 struct nfs_entry old = *entry; 864 __be32 *p;
622
623 if (!*p++) {
624 if (!*p)
625 return ERR_PTR(-EAGAIN);
626 entry->eof = 1;
627 return ERR_PTR(-EBADCOOKIE);
628 }
629
630 p = xdr_decode_hyper(p, &entry->ino);
631 entry->len = ntohl(*p++);
632 entry->name = (const char *) p;
633 p += XDR_QUADLEN(entry->len);
634 entry->prev_cookie = entry->cookie;
635 p = xdr_decode_hyper(p, &entry->cookie);
636 865
637 if (plus) { 866 if (args->guard) {
638 entry->fattr->valid = 0; 867 p = xdr_reserve_space(xdr, 4 + 8);
639 p = xdr_decode_post_op_attr(p, entry->fattr); 868 *p++ = xdr_one;
640 /* In fact, a post_op_fh3: */ 869 xdr_encode_nfstime3(p, &args->guardtime);
641 if (*p++) { 870 } else {
642 p = xdr_decode_fhandle(p, entry->fh); 871 p = xdr_reserve_space(xdr, 4);
643 /* Ugh -- server reply was truncated */ 872 *p = xdr_zero;
644 if (p == NULL) {
645 dprintk("NFS: FH truncated\n");
646 *entry = old;
647 return ERR_PTR(-EAGAIN);
648 }
649 } else
650 memset((u8*)(entry->fh), 0, sizeof(*entry->fh));
651 } 873 }
874}
652 875
653 entry->eof = !p[0] && p[1]; 876static void nfs3_xdr_enc_setattr3args(struct rpc_rqst *req,
654 return p; 877 struct xdr_stream *xdr,
878 const struct nfs3_sattrargs *args)
879{
880 encode_nfs_fh3(xdr, args->fh);
881 encode_sattr3(xdr, args->sattr);
882 encode_sattrguard3(xdr, args);
655} 883}
656 884
657/* 885/*
658 * Encode COMMIT arguments 886 * 3.3.3 LOOKUP3args
887 *
888 * struct LOOKUP3args {
889 * diropargs3 what;
890 * };
659 */ 891 */
660static int 892static void nfs3_xdr_enc_lookup3args(struct rpc_rqst *req,
661nfs3_xdr_commitargs(struct rpc_rqst *req, __be32 *p, struct nfs_writeargs *args) 893 struct xdr_stream *xdr,
894 const struct nfs3_diropargs *args)
662{ 895{
663 p = xdr_encode_fhandle(p, args->fh); 896 encode_diropargs3(xdr, args->fh, args->name, args->len);
664 p = xdr_encode_hyper(p, args->offset);
665 *p++ = htonl(args->count);
666 req->rq_slen = xdr_adjust_iovec(req->rq_svec, p);
667 return 0;
668} 897}
669 898
670#ifdef CONFIG_NFS_V3_ACL
671/* 899/*
672 * Encode GETACL arguments 900 * 3.3.4 ACCESS3args
901 *
902 * struct ACCESS3args {
903 * nfs_fh3 object;
904 * uint32 access;
905 * };
673 */ 906 */
674static int 907static void encode_access3args(struct xdr_stream *xdr,
675nfs3_xdr_getaclargs(struct rpc_rqst *req, __be32 *p, 908 const struct nfs3_accessargs *args)
676 struct nfs3_getaclargs *args)
677{ 909{
678 struct rpc_auth *auth = req->rq_cred->cr_auth; 910 encode_nfs_fh3(xdr, args->fh);
679 unsigned int replen; 911 encode_uint32(xdr, args->access);
912}
680 913
681 p = xdr_encode_fhandle(p, args->fh); 914static void nfs3_xdr_enc_access3args(struct rpc_rqst *req,
682 *p++ = htonl(args->mask); 915 struct xdr_stream *xdr,
683 req->rq_slen = xdr_adjust_iovec(req->rq_svec, p); 916 const struct nfs3_accessargs *args)
917{
918 encode_access3args(xdr, args);
919}
684 920
685 if (args->mask & (NFS_ACL | NFS_DFACL)) { 921/*
686 /* Inline the page array */ 922 * 3.3.5 READLINK3args
687 replen = (RPC_REPHDRSIZE + auth->au_rslack + 923 *
688 ACL3_getaclres_sz) << 2; 924 * struct READLINK3args {
689 xdr_inline_pages(&req->rq_rcv_buf, replen, args->pages, 0, 925 * nfs_fh3 symlink;
690 NFSACL_MAXPAGES << PAGE_SHIFT); 926 * };
691 } 927 */
692 return 0; 928static void nfs3_xdr_enc_readlink3args(struct rpc_rqst *req,
929 struct xdr_stream *xdr,
930 const struct nfs3_readlinkargs *args)
931{
932 encode_nfs_fh3(xdr, args->fh);
933 prepare_reply_buffer(req, args->pages, args->pgbase,
934 args->pglen, NFS3_readlinkres_sz);
693} 935}
694 936
695/* 937/*
696 * Encode SETACL arguments 938 * 3.3.6 READ3args
939 *
940 * struct READ3args {
941 * nfs_fh3 file;
942 * offset3 offset;
943 * count3 count;
944 * };
697 */ 945 */
698static int 946static void encode_read3args(struct xdr_stream *xdr,
699nfs3_xdr_setaclargs(struct rpc_rqst *req, __be32 *p, 947 const struct nfs_readargs *args)
700 struct nfs3_setaclargs *args)
701{ 948{
702 struct xdr_buf *buf = &req->rq_snd_buf; 949 __be32 *p;
703 unsigned int base;
704 int err;
705 950
706 p = xdr_encode_fhandle(p, NFS_FH(args->inode)); 951 encode_nfs_fh3(xdr, args->fh);
707 *p++ = htonl(args->mask);
708 req->rq_slen = xdr_adjust_iovec(req->rq_svec, p);
709 base = req->rq_slen;
710 952
711 if (args->npages != 0) 953 p = xdr_reserve_space(xdr, 8 + 4);
712 xdr_encode_pages(buf, args->pages, 0, args->len); 954 p = xdr_encode_hyper(p, args->offset);
713 else 955 *p = cpu_to_be32(args->count);
714 req->rq_slen = xdr_adjust_iovec(req->rq_svec, 956}
715 p + XDR_QUADLEN(args->len));
716 957
717 err = nfsacl_encode(buf, base, args->inode, 958static void nfs3_xdr_enc_read3args(struct rpc_rqst *req,
718 (args->mask & NFS_ACL) ? 959 struct xdr_stream *xdr,
719 args->acl_access : NULL, 1, 0); 960 const struct nfs_readargs *args)
720 if (err > 0) 961{
721 err = nfsacl_encode(buf, base + err, args->inode, 962 encode_read3args(xdr, args);
722 (args->mask & NFS_DFACL) ? 963 prepare_reply_buffer(req, args->pages, args->pgbase,
723 args->acl_default : NULL, 1, 964 args->count, NFS3_readres_sz);
724 NFS_ACL_DEFAULT); 965 req->rq_rcv_buf.flags |= XDRBUF_READ;
725 return (err > 0) ? 0 : err;
726} 966}
727#endif /* CONFIG_NFS_V3_ACL */
728 967
729/* 968/*
730 * NFS XDR decode functions 969 * 3.3.7 WRITE3args
970 *
971 * enum stable_how {
972 * UNSTABLE = 0,
973 * DATA_SYNC = 1,
974 * FILE_SYNC = 2
975 * };
976 *
977 * struct WRITE3args {
978 * nfs_fh3 file;
979 * offset3 offset;
980 * count3 count;
981 * stable_how stable;
982 * opaque data<>;
983 * };
731 */ 984 */
985static void encode_write3args(struct xdr_stream *xdr,
986 const struct nfs_writeargs *args)
987{
988 __be32 *p;
989
990 encode_nfs_fh3(xdr, args->fh);
991
992 p = xdr_reserve_space(xdr, 8 + 4 + 4 + 4);
993 p = xdr_encode_hyper(p, args->offset);
994 *p++ = cpu_to_be32(args->count);
995 *p++ = cpu_to_be32(args->stable);
996 *p = cpu_to_be32(args->count);
997 xdr_write_pages(xdr, args->pages, args->pgbase, args->count);
998}
999
1000static void nfs3_xdr_enc_write3args(struct rpc_rqst *req,
1001 struct xdr_stream *xdr,
1002 const struct nfs_writeargs *args)
1003{
1004 encode_write3args(xdr, args);
1005 xdr->buf->flags |= XDRBUF_WRITE;
1006}
732 1007
733/* 1008/*
734 * Decode attrstat reply. 1009 * 3.3.8 CREATE3args
1010 *
1011 * enum createmode3 {
1012 * UNCHECKED = 0,
1013 * GUARDED = 1,
1014 * EXCLUSIVE = 2
1015 * };
1016 *
1017 * union createhow3 switch (createmode3 mode) {
1018 * case UNCHECKED:
1019 * case GUARDED:
1020 * sattr3 obj_attributes;
1021 * case EXCLUSIVE:
1022 * createverf3 verf;
1023 * };
1024 *
1025 * struct CREATE3args {
1026 * diropargs3 where;
1027 * createhow3 how;
1028 * };
735 */ 1029 */
736static int 1030static void encode_createhow3(struct xdr_stream *xdr,
737nfs3_xdr_attrstat(struct rpc_rqst *req, __be32 *p, struct nfs_fattr *fattr) 1031 const struct nfs3_createargs *args)
738{ 1032{
739 int status; 1033 encode_uint32(xdr, args->createmode);
1034 switch (args->createmode) {
1035 case NFS3_CREATE_UNCHECKED:
1036 case NFS3_CREATE_GUARDED:
1037 encode_sattr3(xdr, args->sattr);
1038 break;
1039 case NFS3_CREATE_EXCLUSIVE:
1040 encode_createverf3(xdr, args->verifier);
1041 break;
1042 default:
1043 BUG();
1044 }
1045}
740 1046
741 if ((status = ntohl(*p++))) 1047static void nfs3_xdr_enc_create3args(struct rpc_rqst *req,
742 return nfs_stat_to_errno(status); 1048 struct xdr_stream *xdr,
743 xdr_decode_fattr(p, fattr); 1049 const struct nfs3_createargs *args)
744 return 0; 1050{
1051 encode_diropargs3(xdr, args->fh, args->name, args->len);
1052 encode_createhow3(xdr, args);
745} 1053}
746 1054
747/* 1055/*
748 * Decode status+wcc_data reply 1056 * 3.3.9 MKDIR3args
749 * SATTR, REMOVE, RMDIR 1057 *
1058 * struct MKDIR3args {
1059 * diropargs3 where;
1060 * sattr3 attributes;
1061 * };
750 */ 1062 */
751static int 1063static void nfs3_xdr_enc_mkdir3args(struct rpc_rqst *req,
752nfs3_xdr_wccstat(struct rpc_rqst *req, __be32 *p, struct nfs_fattr *fattr) 1064 struct xdr_stream *xdr,
1065 const struct nfs3_mkdirargs *args)
753{ 1066{
754 int status; 1067 encode_diropargs3(xdr, args->fh, args->name, args->len);
1068 encode_sattr3(xdr, args->sattr);
1069}
755 1070
756 if ((status = ntohl(*p++))) 1071/*
757 status = nfs_stat_to_errno(status); 1072 * 3.3.10 SYMLINK3args
758 xdr_decode_wcc_data(p, fattr); 1073 *
759 return status; 1074 * struct symlinkdata3 {
1075 * sattr3 symlink_attributes;
1076 * nfspath3 symlink_data;
1077 * };
1078 *
1079 * struct SYMLINK3args {
1080 * diropargs3 where;
1081 * symlinkdata3 symlink;
1082 * };
1083 */
1084static void encode_symlinkdata3(struct xdr_stream *xdr,
1085 const struct nfs3_symlinkargs *args)
1086{
1087 encode_sattr3(xdr, args->sattr);
1088 encode_nfspath3(xdr, args->pages, args->pathlen);
760} 1089}
761 1090
762static int 1091static void nfs3_xdr_enc_symlink3args(struct rpc_rqst *req,
763nfs3_xdr_removeres(struct rpc_rqst *req, __be32 *p, struct nfs_removeres *res) 1092 struct xdr_stream *xdr,
1093 const struct nfs3_symlinkargs *args)
764{ 1094{
765 return nfs3_xdr_wccstat(req, p, res->dir_attr); 1095 encode_diropargs3(xdr, args->fromfh, args->fromname, args->fromlen);
1096 encode_symlinkdata3(xdr, args);
766} 1097}
767 1098
768/* 1099/*
769 * Decode LOOKUP reply 1100 * 3.3.11 MKNOD3args
1101 *
1102 * struct devicedata3 {
1103 * sattr3 dev_attributes;
1104 * specdata3 spec;
1105 * };
1106 *
1107 * union mknoddata3 switch (ftype3 type) {
1108 * case NF3CHR:
1109 * case NF3BLK:
1110 * devicedata3 device;
1111 * case NF3SOCK:
1112 * case NF3FIFO:
1113 * sattr3 pipe_attributes;
1114 * default:
1115 * void;
1116 * };
1117 *
1118 * struct MKNOD3args {
1119 * diropargs3 where;
1120 * mknoddata3 what;
1121 * };
770 */ 1122 */
771static int 1123static void encode_devicedata3(struct xdr_stream *xdr,
772nfs3_xdr_lookupres(struct rpc_rqst *req, __be32 *p, struct nfs3_diropres *res) 1124 const struct nfs3_mknodargs *args)
773{ 1125{
774 int status; 1126 encode_sattr3(xdr, args->sattr);
1127 encode_specdata3(xdr, args->rdev);
1128}
775 1129
776 if ((status = ntohl(*p++))) { 1130static void encode_mknoddata3(struct xdr_stream *xdr,
777 status = nfs_stat_to_errno(status); 1131 const struct nfs3_mknodargs *args)
778 } else { 1132{
779 if (!(p = xdr_decode_fhandle(p, res->fh))) 1133 encode_ftype3(xdr, args->type);
780 return -errno_NFSERR_IO; 1134 switch (args->type) {
781 p = xdr_decode_post_op_attr(p, res->fattr); 1135 case NF3CHR:
1136 case NF3BLK:
1137 encode_devicedata3(xdr, args);
1138 break;
1139 case NF3SOCK:
1140 case NF3FIFO:
1141 encode_sattr3(xdr, args->sattr);
1142 break;
1143 case NF3REG:
1144 case NF3DIR:
1145 break;
1146 default:
1147 BUG();
782 } 1148 }
783 xdr_decode_post_op_attr(p, res->dir_attr); 1149}
784 return status; 1150
1151static void nfs3_xdr_enc_mknod3args(struct rpc_rqst *req,
1152 struct xdr_stream *xdr,
1153 const struct nfs3_mknodargs *args)
1154{
1155 encode_diropargs3(xdr, args->fh, args->name, args->len);
1156 encode_mknoddata3(xdr, args);
785} 1157}
786 1158
787/* 1159/*
788 * Decode ACCESS reply 1160 * 3.3.12 REMOVE3args
1161 *
1162 * struct REMOVE3args {
1163 * diropargs3 object;
1164 * };
789 */ 1165 */
790static int 1166static void nfs3_xdr_enc_remove3args(struct rpc_rqst *req,
791nfs3_xdr_accessres(struct rpc_rqst *req, __be32 *p, struct nfs3_accessres *res) 1167 struct xdr_stream *xdr,
1168 const struct nfs_removeargs *args)
792{ 1169{
793 int status = ntohl(*p++); 1170 encode_diropargs3(xdr, args->fh, args->name.name, args->name.len);
1171}
794 1172
795 p = xdr_decode_post_op_attr(p, res->fattr); 1173/*
796 if (status) 1174 * 3.3.14 RENAME3args
797 return nfs_stat_to_errno(status); 1175 *
798 res->access = ntohl(*p++); 1176 * struct RENAME3args {
799 return 0; 1177 * diropargs3 from;
1178 * diropargs3 to;
1179 * };
1180 */
1181static void nfs3_xdr_enc_rename3args(struct rpc_rqst *req,
1182 struct xdr_stream *xdr,
1183 const struct nfs_renameargs *args)
1184{
1185 const struct qstr *old = args->old_name;
1186 const struct qstr *new = args->new_name;
1187
1188 encode_diropargs3(xdr, args->old_dir, old->name, old->len);
1189 encode_diropargs3(xdr, args->new_dir, new->name, new->len);
800} 1190}
801 1191
802static int 1192/*
803nfs3_xdr_readlinkargs(struct rpc_rqst *req, __be32 *p, struct nfs3_readlinkargs *args) 1193 * 3.3.15 LINK3args
1194 *
1195 * struct LINK3args {
1196 * nfs_fh3 file;
1197 * diropargs3 link;
1198 * };
1199 */
1200static void nfs3_xdr_enc_link3args(struct rpc_rqst *req,
1201 struct xdr_stream *xdr,
1202 const struct nfs3_linkargs *args)
804{ 1203{
805 struct rpc_auth *auth = req->rq_cred->cr_auth; 1204 encode_nfs_fh3(xdr, args->fromfh);
806 unsigned int replen; 1205 encode_diropargs3(xdr, args->tofh, args->toname, args->tolen);
1206}
807 1207
808 p = xdr_encode_fhandle(p, args->fh); 1208/*
809 req->rq_slen = xdr_adjust_iovec(req->rq_svec, p); 1209 * 3.3.16 READDIR3args
1210 *
1211 * struct READDIR3args {
1212 * nfs_fh3 dir;
1213 * cookie3 cookie;
1214 * cookieverf3 cookieverf;
1215 * count3 count;
1216 * };
1217 */
1218static void encode_readdir3args(struct xdr_stream *xdr,
1219 const struct nfs3_readdirargs *args)
1220{
1221 __be32 *p;
810 1222
811 /* Inline the page array */ 1223 encode_nfs_fh3(xdr, args->fh);
812 replen = (RPC_REPHDRSIZE + auth->au_rslack + NFS3_readlinkres_sz) << 2; 1224
813 xdr_inline_pages(&req->rq_rcv_buf, replen, args->pages, args->pgbase, args->pglen); 1225 p = xdr_reserve_space(xdr, 8 + NFS3_COOKIEVERFSIZE + 4);
814 return 0; 1226 p = xdr_encode_cookie3(p, args->cookie);
1227 p = xdr_encode_cookieverf3(p, args->verf);
1228 *p = cpu_to_be32(args->count);
1229}
1230
1231static void nfs3_xdr_enc_readdir3args(struct rpc_rqst *req,
1232 struct xdr_stream *xdr,
1233 const struct nfs3_readdirargs *args)
1234{
1235 encode_readdir3args(xdr, args);
1236 prepare_reply_buffer(req, args->pages, 0,
1237 args->count, NFS3_readdirres_sz);
815} 1238}
816 1239
817/* 1240/*
818 * Decode READLINK reply 1241 * 3.3.17 READDIRPLUS3args
1242 *
1243 * struct READDIRPLUS3args {
1244 * nfs_fh3 dir;
1245 * cookie3 cookie;
1246 * cookieverf3 cookieverf;
1247 * count3 dircount;
1248 * count3 maxcount;
1249 * };
819 */ 1250 */
820static int 1251static void encode_readdirplus3args(struct xdr_stream *xdr,
821nfs3_xdr_readlinkres(struct rpc_rqst *req, __be32 *p, struct nfs_fattr *fattr) 1252 const struct nfs3_readdirargs *args)
822{ 1253{
823 struct xdr_buf *rcvbuf = &req->rq_rcv_buf; 1254 __be32 *p;
824 struct kvec *iov = rcvbuf->head;
825 size_t hdrlen;
826 u32 len, recvd;
827 char *kaddr;
828 int status;
829 1255
830 status = ntohl(*p++); 1256 encode_nfs_fh3(xdr, args->fh);
831 p = xdr_decode_post_op_attr(p, fattr);
832 1257
833 if (status != 0) 1258 p = xdr_reserve_space(xdr, 8 + NFS3_COOKIEVERFSIZE + 4 + 4);
834 return nfs_stat_to_errno(status); 1259 p = xdr_encode_cookie3(p, args->cookie);
1260 p = xdr_encode_cookieverf3(p, args->verf);
835 1261
836 /* Convert length of symlink */ 1262 /*
837 len = ntohl(*p++); 1263 * readdirplus: need dircount + buffer size.
838 if (len >= rcvbuf->page_len) { 1264 * We just make sure we make dircount big enough
839 dprintk("nfs: server returned giant symlink!\n"); 1265 */
840 return -ENAMETOOLONG; 1266 *p++ = cpu_to_be32(args->count >> 3);
841 }
842 1267
843 hdrlen = (u8 *) p - (u8 *) iov->iov_base; 1268 *p = cpu_to_be32(args->count);
844 if (iov->iov_len < hdrlen) { 1269}
845 dprintk("NFS: READLINK reply header overflowed:"
846 "length %Zu > %Zu\n", hdrlen, iov->iov_len);
847 return -errno_NFSERR_IO;
848 } else if (iov->iov_len != hdrlen) {
849 dprintk("NFS: READLINK header is short. "
850 "iovec will be shifted.\n");
851 xdr_shift_buf(rcvbuf, iov->iov_len - hdrlen);
852 }
853 recvd = req->rq_rcv_buf.len - hdrlen;
854 if (recvd < len) {
855 dprintk("NFS: server cheating in readlink reply: "
856 "count %u > recvd %u\n", len, recvd);
857 return -EIO;
858 }
859 1270
860 /* NULL terminate the string we got */ 1271static void nfs3_xdr_enc_readdirplus3args(struct rpc_rqst *req,
861 kaddr = (char*)kmap_atomic(rcvbuf->pages[0], KM_USER0); 1272 struct xdr_stream *xdr,
862 kaddr[len+rcvbuf->page_base] = '\0'; 1273 const struct nfs3_readdirargs *args)
863 kunmap_atomic(kaddr, KM_USER0); 1274{
864 return 0; 1275 encode_readdirplus3args(xdr, args);
1276 prepare_reply_buffer(req, args->pages, 0,
1277 args->count, NFS3_readdirres_sz);
865} 1278}
866 1279
867/* 1280/*
868 * Decode READ reply 1281 * 3.3.21 COMMIT3args
1282 *
1283 * struct COMMIT3args {
1284 * nfs_fh3 file;
1285 * offset3 offset;
1286 * count3 count;
1287 * };
869 */ 1288 */
870static int 1289static void encode_commit3args(struct xdr_stream *xdr,
871nfs3_xdr_readres(struct rpc_rqst *req, __be32 *p, struct nfs_readres *res) 1290 const struct nfs_writeargs *args)
872{ 1291{
873 struct kvec *iov = req->rq_rcv_buf.head; 1292 __be32 *p;
874 size_t hdrlen;
875 u32 count, ocount, recvd;
876 int status;
877 1293
878 status = ntohl(*p++); 1294 encode_nfs_fh3(xdr, args->fh);
879 p = xdr_decode_post_op_attr(p, res->fattr);
880 1295
881 if (status != 0) 1296 p = xdr_reserve_space(xdr, 8 + 4);
882 return nfs_stat_to_errno(status); 1297 p = xdr_encode_hyper(p, args->offset);
1298 *p = cpu_to_be32(args->count);
1299}
883 1300
884 /* Decode reply count and EOF flag. NFSv3 is somewhat redundant 1301static void nfs3_xdr_enc_commit3args(struct rpc_rqst *req,
885 * in that it puts the count both in the res struct and in the 1302 struct xdr_stream *xdr,
886 * opaque data count. */ 1303 const struct nfs_writeargs *args)
887 count = ntohl(*p++); 1304{
888 res->eof = ntohl(*p++); 1305 encode_commit3args(xdr, args);
889 ocount = ntohl(*p++); 1306}
890 1307
891 if (ocount != count) { 1308#ifdef CONFIG_NFS_V3_ACL
892 dprintk("NFS: READ count doesn't match RPC opaque count.\n");
893 return -errno_NFSERR_IO;
894 }
895 1309
896 hdrlen = (u8 *) p - (u8 *) iov->iov_base; 1310static void nfs3_xdr_enc_getacl3args(struct rpc_rqst *req,
897 if (iov->iov_len < hdrlen) { 1311 struct xdr_stream *xdr,
898 dprintk("NFS: READ reply header overflowed:" 1312 const struct nfs3_getaclargs *args)
899 "length %Zu > %Zu\n", hdrlen, iov->iov_len); 1313{
900 return -errno_NFSERR_IO; 1314 encode_nfs_fh3(xdr, args->fh);
901 } else if (iov->iov_len != hdrlen) { 1315 encode_uint32(xdr, args->mask);
902 dprintk("NFS: READ header is short. iovec will be shifted.\n"); 1316 if (args->mask & (NFS_ACL | NFS_DFACL))
903 xdr_shift_buf(&req->rq_rcv_buf, iov->iov_len - hdrlen); 1317 prepare_reply_buffer(req, args->pages, 0,
904 } 1318 NFSACL_MAXPAGES << PAGE_SHIFT,
1319 ACL3_getaclres_sz);
1320}
905 1321
906 recvd = req->rq_rcv_buf.len - hdrlen; 1322static void nfs3_xdr_enc_setacl3args(struct rpc_rqst *req,
907 if (count > recvd) { 1323 struct xdr_stream *xdr,
908 dprintk("NFS: server cheating in read reply: " 1324 const struct nfs3_setaclargs *args)
909 "count %u > recvd %u\n", count, recvd); 1325{
910 count = recvd; 1326 unsigned int base;
911 res->eof = 0; 1327 int error;
912 }
913 1328
914 if (count < res->count) 1329 encode_nfs_fh3(xdr, NFS_FH(args->inode));
915 res->count = count; 1330 encode_uint32(xdr, args->mask);
916 1331
917 return count; 1332 base = req->rq_slen;
1333 if (args->npages != 0)
1334 xdr_write_pages(xdr, args->pages, 0, args->len);
1335 else
1336 xdr_reserve_space(xdr, NFS_ACL_INLINE_BUFSIZE);
1337
1338 error = nfsacl_encode(xdr->buf, base, args->inode,
1339 (args->mask & NFS_ACL) ?
1340 args->acl_access : NULL, 1, 0);
1341 BUG_ON(error < 0);
1342 error = nfsacl_encode(xdr->buf, base + error, args->inode,
1343 (args->mask & NFS_DFACL) ?
1344 args->acl_default : NULL, 1,
1345 NFS_ACL_DEFAULT);
1346 BUG_ON(error < 0);
918} 1347}
919 1348
1349#endif /* CONFIG_NFS_V3_ACL */
1350
920/* 1351/*
921 * Decode WRITE response 1352 * NFSv3 XDR decode functions
1353 *
1354 * NFSv3 result types are defined in section 3.3 of RFC 1813:
1355 * "NFS Version 3 Protocol Specification".
922 */ 1356 */
923static int
924nfs3_xdr_writeres(struct rpc_rqst *req, __be32 *p, struct nfs_writeres *res)
925{
926 int status;
927 1357
928 status = ntohl(*p++); 1358/*
929 p = xdr_decode_wcc_data(p, res->fattr); 1359 * 3.3.1 GETATTR3res
1360 *
1361 * struct GETATTR3resok {
1362 * fattr3 obj_attributes;
1363 * };
1364 *
1365 * union GETATTR3res switch (nfsstat3 status) {
1366 * case NFS3_OK:
1367 * GETATTR3resok resok;
1368 * default:
1369 * void;
1370 * };
1371 */
1372static int nfs3_xdr_dec_getattr3res(struct rpc_rqst *req,
1373 struct xdr_stream *xdr,
1374 struct nfs_fattr *result)
1375{
1376 enum nfs_stat status;
1377 int error;
1378
1379 error = decode_nfsstat3(xdr, &status);
1380 if (unlikely(error))
1381 goto out;
1382 if (status != NFS3_OK)
1383 goto out_default;
1384 error = decode_fattr3(xdr, result);
1385out:
1386 return error;
1387out_default:
1388 return nfs_stat_to_errno(status);
1389}
930 1390
931 if (status != 0) 1391/*
932 return nfs_stat_to_errno(status); 1392 * 3.3.2 SETATTR3res
1393 *
1394 * struct SETATTR3resok {
1395 * wcc_data obj_wcc;
1396 * };
1397 *
1398 * struct SETATTR3resfail {
1399 * wcc_data obj_wcc;
1400 * };
1401 *
1402 * union SETATTR3res switch (nfsstat3 status) {
1403 * case NFS3_OK:
1404 * SETATTR3resok resok;
1405 * default:
1406 * SETATTR3resfail resfail;
1407 * };
1408 */
1409static int nfs3_xdr_dec_setattr3res(struct rpc_rqst *req,
1410 struct xdr_stream *xdr,
1411 struct nfs_fattr *result)
1412{
1413 enum nfs_stat status;
1414 int error;
1415
1416 error = decode_nfsstat3(xdr, &status);
1417 if (unlikely(error))
1418 goto out;
1419 error = decode_wcc_data(xdr, result);
1420 if (unlikely(error))
1421 goto out;
1422 if (status != NFS3_OK)
1423 goto out_status;
1424out:
1425 return error;
1426out_status:
1427 return nfs_stat_to_errno(status);
1428}
933 1429
934 res->count = ntohl(*p++); 1430/*
935 res->verf->committed = (enum nfs3_stable_how)ntohl(*p++); 1431 * 3.3.3 LOOKUP3res
936 res->verf->verifier[0] = *p++; 1432 *
937 res->verf->verifier[1] = *p++; 1433 * struct LOOKUP3resok {
1434 * nfs_fh3 object;
1435 * post_op_attr obj_attributes;
1436 * post_op_attr dir_attributes;
1437 * };
1438 *
1439 * struct LOOKUP3resfail {
1440 * post_op_attr dir_attributes;
1441 * };
1442 *
1443 * union LOOKUP3res switch (nfsstat3 status) {
1444 * case NFS3_OK:
1445 * LOOKUP3resok resok;
1446 * default:
1447 * LOOKUP3resfail resfail;
1448 * };
1449 */
1450static int nfs3_xdr_dec_lookup3res(struct rpc_rqst *req,
1451 struct xdr_stream *xdr,
1452 struct nfs3_diropres *result)
1453{
1454 enum nfs_stat status;
1455 int error;
1456
1457 error = decode_nfsstat3(xdr, &status);
1458 if (unlikely(error))
1459 goto out;
1460 if (status != NFS3_OK)
1461 goto out_default;
1462 error = decode_nfs_fh3(xdr, result->fh);
1463 if (unlikely(error))
1464 goto out;
1465 error = decode_post_op_attr(xdr, result->fattr);
1466 if (unlikely(error))
1467 goto out;
1468 error = decode_post_op_attr(xdr, result->dir_attr);
1469out:
1470 return error;
1471out_default:
1472 error = decode_post_op_attr(xdr, result->dir_attr);
1473 if (unlikely(error))
1474 goto out;
1475 return nfs_stat_to_errno(status);
1476}
938 1477
939 return res->count; 1478/*
1479 * 3.3.4 ACCESS3res
1480 *
1481 * struct ACCESS3resok {
1482 * post_op_attr obj_attributes;
1483 * uint32 access;
1484 * };
1485 *
1486 * struct ACCESS3resfail {
1487 * post_op_attr obj_attributes;
1488 * };
1489 *
1490 * union ACCESS3res switch (nfsstat3 status) {
1491 * case NFS3_OK:
1492 * ACCESS3resok resok;
1493 * default:
1494 * ACCESS3resfail resfail;
1495 * };
1496 */
1497static int nfs3_xdr_dec_access3res(struct rpc_rqst *req,
1498 struct xdr_stream *xdr,
1499 struct nfs3_accessres *result)
1500{
1501 enum nfs_stat status;
1502 int error;
1503
1504 error = decode_nfsstat3(xdr, &status);
1505 if (unlikely(error))
1506 goto out;
1507 error = decode_post_op_attr(xdr, result->fattr);
1508 if (unlikely(error))
1509 goto out;
1510 if (status != NFS3_OK)
1511 goto out_default;
1512 error = decode_uint32(xdr, &result->access);
1513out:
1514 return error;
1515out_default:
1516 return nfs_stat_to_errno(status);
940} 1517}
941 1518
942/* 1519/*
943 * Decode a CREATE response 1520 * 3.3.5 READLINK3res
1521 *
1522 * struct READLINK3resok {
1523 * post_op_attr symlink_attributes;
1524 * nfspath3 data;
1525 * };
1526 *
1527 * struct READLINK3resfail {
1528 * post_op_attr symlink_attributes;
1529 * };
1530 *
1531 * union READLINK3res switch (nfsstat3 status) {
1532 * case NFS3_OK:
1533 * READLINK3resok resok;
1534 * default:
1535 * READLINK3resfail resfail;
1536 * };
944 */ 1537 */
945static int 1538static int nfs3_xdr_dec_readlink3res(struct rpc_rqst *req,
946nfs3_xdr_createres(struct rpc_rqst *req, __be32 *p, struct nfs3_diropres *res) 1539 struct xdr_stream *xdr,
947{ 1540 struct nfs_fattr *result)
948 int status; 1541{
949 1542 enum nfs_stat status;
950 status = ntohl(*p++); 1543 int error;
951 if (status == 0) { 1544
952 if (*p++) { 1545 error = decode_nfsstat3(xdr, &status);
953 if (!(p = xdr_decode_fhandle(p, res->fh))) 1546 if (unlikely(error))
954 return -errno_NFSERR_IO; 1547 goto out;
955 p = xdr_decode_post_op_attr(p, res->fattr); 1548 error = decode_post_op_attr(xdr, result);
956 } else { 1549 if (unlikely(error))
957 memset(res->fh, 0, sizeof(*res->fh)); 1550 goto out;
958 /* Do decode post_op_attr but set it to NULL */ 1551 if (status != NFS3_OK)
959 p = xdr_decode_post_op_attr(p, res->fattr); 1552 goto out_default;
960 res->fattr->valid = 0; 1553 error = decode_nfspath3(xdr);
961 } 1554out:
962 } else { 1555 return error;
963 status = nfs_stat_to_errno(status); 1556out_default:
964 } 1557 return nfs_stat_to_errno(status);
965 p = xdr_decode_wcc_data(p, res->dir_attr);
966 return status;
967} 1558}
968 1559
969/* 1560/*
970 * Decode RENAME reply 1561 * 3.3.6 READ3res
1562 *
1563 * struct READ3resok {
1564 * post_op_attr file_attributes;
1565 * count3 count;
1566 * bool eof;
1567 * opaque data<>;
1568 * };
1569 *
1570 * struct READ3resfail {
1571 * post_op_attr file_attributes;
1572 * };
1573 *
1574 * union READ3res switch (nfsstat3 status) {
1575 * case NFS3_OK:
1576 * READ3resok resok;
1577 * default:
1578 * READ3resfail resfail;
1579 * };
971 */ 1580 */
972static int 1581static int decode_read3resok(struct xdr_stream *xdr,
973nfs3_xdr_renameres(struct rpc_rqst *req, __be32 *p, struct nfs3_renameres *res) 1582 struct nfs_readres *result)
974{ 1583{
975 int status; 1584 u32 eof, count, ocount, recvd;
1585 size_t hdrlen;
1586 __be32 *p;
1587
1588 p = xdr_inline_decode(xdr, 4 + 4 + 4);
1589 if (unlikely(p == NULL))
1590 goto out_overflow;
1591 count = be32_to_cpup(p++);
1592 eof = be32_to_cpup(p++);
1593 ocount = be32_to_cpup(p++);
1594 if (unlikely(ocount != count))
1595 goto out_mismatch;
1596 hdrlen = (u8 *)xdr->p - (u8 *)xdr->iov->iov_base;
1597 recvd = xdr->buf->len - hdrlen;
1598 if (unlikely(count > recvd))
1599 goto out_cheating;
1600
1601out:
1602 xdr_read_pages(xdr, count);
1603 result->eof = eof;
1604 result->count = count;
1605 return count;
1606out_mismatch:
1607 dprintk("NFS: READ count doesn't match length of opaque: "
1608 "count %u != ocount %u\n", count, ocount);
1609 return -EIO;
1610out_cheating:
1611 dprintk("NFS: server cheating in read result: "
1612 "count %u > recvd %u\n", count, recvd);
1613 count = recvd;
1614 eof = 0;
1615 goto out;
1616out_overflow:
1617 print_overflow_msg(__func__, xdr);
1618 return -EIO;
1619}
976 1620
977 if ((status = ntohl(*p++)) != 0) 1621static int nfs3_xdr_dec_read3res(struct rpc_rqst *req, struct xdr_stream *xdr,
978 status = nfs_stat_to_errno(status); 1622 struct nfs_readres *result)
979 p = xdr_decode_wcc_data(p, res->fromattr); 1623{
980 p = xdr_decode_wcc_data(p, res->toattr); 1624 enum nfs_stat status;
981 return status; 1625 int error;
1626
1627 error = decode_nfsstat3(xdr, &status);
1628 if (unlikely(error))
1629 goto out;
1630 error = decode_post_op_attr(xdr, result->fattr);
1631 if (unlikely(error))
1632 goto out;
1633 if (status != NFS3_OK)
1634 goto out_status;
1635 error = decode_read3resok(xdr, result);
1636out:
1637 return error;
1638out_status:
1639 return nfs_stat_to_errno(status);
982} 1640}
983 1641
984/* 1642/*
985 * Decode LINK reply 1643 * 3.3.7 WRITE3res
1644 *
1645 * enum stable_how {
1646 * UNSTABLE = 0,
1647 * DATA_SYNC = 1,
1648 * FILE_SYNC = 2
1649 * };
1650 *
1651 * struct WRITE3resok {
1652 * wcc_data file_wcc;
1653 * count3 count;
1654 * stable_how committed;
1655 * writeverf3 verf;
1656 * };
1657 *
1658 * struct WRITE3resfail {
1659 * wcc_data file_wcc;
1660 * };
1661 *
1662 * union WRITE3res switch (nfsstat3 status) {
1663 * case NFS3_OK:
1664 * WRITE3resok resok;
1665 * default:
1666 * WRITE3resfail resfail;
1667 * };
986 */ 1668 */
987static int 1669static int decode_write3resok(struct xdr_stream *xdr,
988nfs3_xdr_linkres(struct rpc_rqst *req, __be32 *p, struct nfs3_linkres *res) 1670 struct nfs_writeres *result)
989{ 1671{
990 int status; 1672 __be32 *p;
1673
1674 p = xdr_inline_decode(xdr, 4 + 4 + NFS3_WRITEVERFSIZE);
1675 if (unlikely(p == NULL))
1676 goto out_overflow;
1677 result->count = be32_to_cpup(p++);
1678 result->verf->committed = be32_to_cpup(p++);
1679 if (unlikely(result->verf->committed > NFS_FILE_SYNC))
1680 goto out_badvalue;
1681 memcpy(result->verf->verifier, p, NFS3_WRITEVERFSIZE);
1682 return result->count;
1683out_badvalue:
1684 dprintk("NFS: bad stable_how value: %u\n", result->verf->committed);
1685 return -EIO;
1686out_overflow:
1687 print_overflow_msg(__func__, xdr);
1688 return -EIO;
1689}
991 1690
992 if ((status = ntohl(*p++)) != 0) 1691static int nfs3_xdr_dec_write3res(struct rpc_rqst *req, struct xdr_stream *xdr,
993 status = nfs_stat_to_errno(status); 1692 struct nfs_writeres *result)
994 p = xdr_decode_post_op_attr(p, res->fattr); 1693{
995 p = xdr_decode_wcc_data(p, res->dir_attr); 1694 enum nfs_stat status;
996 return status; 1695 int error;
1696
1697 error = decode_nfsstat3(xdr, &status);
1698 if (unlikely(error))
1699 goto out;
1700 error = decode_wcc_data(xdr, result->fattr);
1701 if (unlikely(error))
1702 goto out;
1703 if (status != NFS3_OK)
1704 goto out_status;
1705 error = decode_write3resok(xdr, result);
1706out:
1707 return error;
1708out_status:
1709 return nfs_stat_to_errno(status);
997} 1710}
998 1711
999/* 1712/*
1000 * Decode FSSTAT reply 1713 * 3.3.8 CREATE3res
1714 *
1715 * struct CREATE3resok {
1716 * post_op_fh3 obj;
1717 * post_op_attr obj_attributes;
1718 * wcc_data dir_wcc;
1719 * };
1720 *
1721 * struct CREATE3resfail {
1722 * wcc_data dir_wcc;
1723 * };
1724 *
1725 * union CREATE3res switch (nfsstat3 status) {
1726 * case NFS3_OK:
1727 * CREATE3resok resok;
1728 * default:
1729 * CREATE3resfail resfail;
1730 * };
1001 */ 1731 */
1002static int 1732static int decode_create3resok(struct xdr_stream *xdr,
1003nfs3_xdr_fsstatres(struct rpc_rqst *req, __be32 *p, struct nfs_fsstat *res) 1733 struct nfs3_diropres *result)
1004{ 1734{
1005 int status; 1735 int error;
1006 1736
1007 status = ntohl(*p++); 1737 error = decode_post_op_fh3(xdr, result->fh);
1738 if (unlikely(error))
1739 goto out;
1740 error = decode_post_op_attr(xdr, result->fattr);
1741 if (unlikely(error))
1742 goto out;
1743 /* The server isn't required to return a file handle.
1744 * If it didn't, force the client to perform a LOOKUP
1745 * to determine the correct file handle and attribute
1746 * values for the new object. */
1747 if (result->fh->size == 0)
1748 result->fattr->valid = 0;
1749 error = decode_wcc_data(xdr, result->dir_attr);
1750out:
1751 return error;
1752}
1008 1753
1009 p = xdr_decode_post_op_attr(p, res->fattr); 1754static int nfs3_xdr_dec_create3res(struct rpc_rqst *req,
1010 if (status != 0) 1755 struct xdr_stream *xdr,
1011 return nfs_stat_to_errno(status); 1756 struct nfs3_diropres *result)
1757{
1758 enum nfs_stat status;
1759 int error;
1760
1761 error = decode_nfsstat3(xdr, &status);
1762 if (unlikely(error))
1763 goto out;
1764 if (status != NFS3_OK)
1765 goto out_default;
1766 error = decode_create3resok(xdr, result);
1767out:
1768 return error;
1769out_default:
1770 error = decode_wcc_data(xdr, result->dir_attr);
1771 if (unlikely(error))
1772 goto out;
1773 return nfs_stat_to_errno(status);
1774}
1012 1775
1013 p = xdr_decode_hyper(p, &res->tbytes); 1776/*
1014 p = xdr_decode_hyper(p, &res->fbytes); 1777 * 3.3.12 REMOVE3res
1015 p = xdr_decode_hyper(p, &res->abytes); 1778 *
1016 p = xdr_decode_hyper(p, &res->tfiles); 1779 * struct REMOVE3resok {
1017 p = xdr_decode_hyper(p, &res->ffiles); 1780 * wcc_data dir_wcc;
1018 p = xdr_decode_hyper(p, &res->afiles); 1781 * };
1782 *
1783 * struct REMOVE3resfail {
1784 * wcc_data dir_wcc;
1785 * };
1786 *
1787 * union REMOVE3res switch (nfsstat3 status) {
1788 * case NFS3_OK:
1789 * REMOVE3resok resok;
1790 * default:
1791 * REMOVE3resfail resfail;
1792 * };
1793 */
1794static int nfs3_xdr_dec_remove3res(struct rpc_rqst *req,
1795 struct xdr_stream *xdr,
1796 struct nfs_removeres *result)
1797{
1798 enum nfs_stat status;
1799 int error;
1800
1801 error = decode_nfsstat3(xdr, &status);
1802 if (unlikely(error))
1803 goto out;
1804 error = decode_wcc_data(xdr, result->dir_attr);
1805 if (unlikely(error))
1806 goto out;
1807 if (status != NFS3_OK)
1808 goto out_status;
1809out:
1810 return error;
1811out_status:
1812 return nfs_stat_to_errno(status);
1813}
1019 1814
1020 /* ignore invarsec */ 1815/*
1021 return 0; 1816 * 3.3.14 RENAME3res
1817 *
1818 * struct RENAME3resok {
1819 * wcc_data fromdir_wcc;
1820 * wcc_data todir_wcc;
1821 * };
1822 *
1823 * struct RENAME3resfail {
1824 * wcc_data fromdir_wcc;
1825 * wcc_data todir_wcc;
1826 * };
1827 *
1828 * union RENAME3res switch (nfsstat3 status) {
1829 * case NFS3_OK:
1830 * RENAME3resok resok;
1831 * default:
1832 * RENAME3resfail resfail;
1833 * };
1834 */
1835static int nfs3_xdr_dec_rename3res(struct rpc_rqst *req,
1836 struct xdr_stream *xdr,
1837 struct nfs_renameres *result)
1838{
1839 enum nfs_stat status;
1840 int error;
1841
1842 error = decode_nfsstat3(xdr, &status);
1843 if (unlikely(error))
1844 goto out;
1845 error = decode_wcc_data(xdr, result->old_fattr);
1846 if (unlikely(error))
1847 goto out;
1848 error = decode_wcc_data(xdr, result->new_fattr);
1849 if (unlikely(error))
1850 goto out;
1851 if (status != NFS3_OK)
1852 goto out_status;
1853out:
1854 return error;
1855out_status:
1856 return nfs_stat_to_errno(status);
1022} 1857}
1023 1858
1024/* 1859/*
1025 * Decode FSINFO reply 1860 * 3.3.15 LINK3res
1861 *
1862 * struct LINK3resok {
1863 * post_op_attr file_attributes;
1864 * wcc_data linkdir_wcc;
1865 * };
1866 *
1867 * struct LINK3resfail {
1868 * post_op_attr file_attributes;
1869 * wcc_data linkdir_wcc;
1870 * };
1871 *
1872 * union LINK3res switch (nfsstat3 status) {
1873 * case NFS3_OK:
1874 * LINK3resok resok;
1875 * default:
1876 * LINK3resfail resfail;
1877 * };
1026 */ 1878 */
1027static int 1879static int nfs3_xdr_dec_link3res(struct rpc_rqst *req, struct xdr_stream *xdr,
1028nfs3_xdr_fsinfores(struct rpc_rqst *req, __be32 *p, struct nfs_fsinfo *res) 1880 struct nfs3_linkres *result)
1029{ 1881{
1030 int status; 1882 enum nfs_stat status;
1883 int error;
1884
1885 error = decode_nfsstat3(xdr, &status);
1886 if (unlikely(error))
1887 goto out;
1888 error = decode_post_op_attr(xdr, result->fattr);
1889 if (unlikely(error))
1890 goto out;
1891 error = decode_wcc_data(xdr, result->dir_attr);
1892 if (unlikely(error))
1893 goto out;
1894 if (status != NFS3_OK)
1895 goto out_status;
1896out:
1897 return error;
1898out_status:
1899 return nfs_stat_to_errno(status);
1900}
1901
1902/**
1903 * nfs3_decode_dirent - Decode a single NFSv3 directory entry stored in
1904 * the local page cache
1905 * @xdr: XDR stream where entry resides
1906 * @entry: buffer to fill in with entry data
1907 * @plus: boolean indicating whether this should be a readdirplus entry
1908 *
1909 * Returns zero if successful, otherwise a negative errno value is
1910 * returned.
1911 *
1912 * This function is not invoked during READDIR reply decoding, but
1913 * rather whenever an application invokes the getdents(2) system call
1914 * on a directory already in our cache.
1915 *
1916 * 3.3.16 entry3
1917 *
1918 * struct entry3 {
1919 * fileid3 fileid;
1920 * filename3 name;
1921 * cookie3 cookie;
1922 * fhandle3 filehandle;
1923 * post_op_attr3 attributes;
1924 * entry3 *nextentry;
1925 * };
1926 *
1927 * 3.3.17 entryplus3
1928 * struct entryplus3 {
1929 * fileid3 fileid;
1930 * filename3 name;
1931 * cookie3 cookie;
1932 * post_op_attr name_attributes;
1933 * post_op_fh3 name_handle;
1934 * entryplus3 *nextentry;
1935 * };
1936 */
1937int nfs3_decode_dirent(struct xdr_stream *xdr, struct nfs_entry *entry,
1938 int plus)
1939{
1940 struct nfs_entry old = *entry;
1941 __be32 *p;
1942 int error;
1943
1944 p = xdr_inline_decode(xdr, 4);
1945 if (unlikely(p == NULL))
1946 goto out_overflow;
1947 if (*p == xdr_zero) {
1948 p = xdr_inline_decode(xdr, 4);
1949 if (unlikely(p == NULL))
1950 goto out_overflow;
1951 if (*p == xdr_zero)
1952 return -EAGAIN;
1953 entry->eof = 1;
1954 return -EBADCOOKIE;
1955 }
1031 1956
1032 status = ntohl(*p++); 1957 error = decode_fileid3(xdr, &entry->ino);
1958 if (unlikely(error))
1959 return error;
1033 1960
1034 p = xdr_decode_post_op_attr(p, res->fattr); 1961 error = decode_inline_filename3(xdr, &entry->name, &entry->len);
1035 if (status != 0) 1962 if (unlikely(error))
1036 return nfs_stat_to_errno(status); 1963 return error;
1037 1964
1038 res->rtmax = ntohl(*p++); 1965 entry->prev_cookie = entry->cookie;
1039 res->rtpref = ntohl(*p++); 1966 error = decode_cookie3(xdr, &entry->cookie);
1040 res->rtmult = ntohl(*p++); 1967 if (unlikely(error))
1041 res->wtmax = ntohl(*p++); 1968 return error;
1042 res->wtpref = ntohl(*p++); 1969
1043 res->wtmult = ntohl(*p++); 1970 entry->d_type = DT_UNKNOWN;
1044 res->dtpref = ntohl(*p++); 1971
1045 p = xdr_decode_hyper(p, &res->maxfilesize); 1972 if (plus) {
1973 entry->fattr->valid = 0;
1974 error = decode_post_op_attr(xdr, entry->fattr);
1975 if (unlikely(error))
1976 return error;
1977 if (entry->fattr->valid & NFS_ATTR_FATTR_V3)
1978 entry->d_type = nfs_umode_to_dtype(entry->fattr->mode);
1979
1980 /* In fact, a post_op_fh3: */
1981 p = xdr_inline_decode(xdr, 4);
1982 if (unlikely(p == NULL))
1983 goto out_overflow;
1984 if (*p != xdr_zero) {
1985 error = decode_nfs_fh3(xdr, entry->fh);
1986 if (unlikely(error)) {
1987 if (error == -E2BIG)
1988 goto out_truncated;
1989 return error;
1990 }
1991 } else
1992 zero_nfs_fh3(entry->fh);
1993 }
1046 1994
1047 /* ignore time_delta and properties */
1048 res->lease_time = 0;
1049 return 0; 1995 return 0;
1996
1997out_overflow:
1998 print_overflow_msg(__func__, xdr);
1999 return -EAGAIN;
2000out_truncated:
2001 dprintk("NFS: directory entry contains invalid file handle\n");
2002 *entry = old;
2003 return -EAGAIN;
1050} 2004}
1051 2005
1052/* 2006/*
1053 * Decode PATHCONF reply 2007 * 3.3.16 READDIR3res
2008 *
2009 * struct dirlist3 {
2010 * entry3 *entries;
2011 * bool eof;
2012 * };
2013 *
2014 * struct READDIR3resok {
2015 * post_op_attr dir_attributes;
2016 * cookieverf3 cookieverf;
2017 * dirlist3 reply;
2018 * };
2019 *
2020 * struct READDIR3resfail {
2021 * post_op_attr dir_attributes;
2022 * };
2023 *
2024 * union READDIR3res switch (nfsstat3 status) {
2025 * case NFS3_OK:
2026 * READDIR3resok resok;
2027 * default:
2028 * READDIR3resfail resfail;
2029 * };
2030 *
2031 * Read the directory contents into the page cache, but otherwise
2032 * don't touch them. The actual decoding is done by nfs3_decode_entry()
2033 * during subsequent nfs_readdir() calls.
1054 */ 2034 */
1055static int 2035static int decode_dirlist3(struct xdr_stream *xdr)
1056nfs3_xdr_pathconfres(struct rpc_rqst *req, __be32 *p, struct nfs_pathconf *res)
1057{ 2036{
1058 int status; 2037 u32 recvd, pglen;
2038 size_t hdrlen;
1059 2039
1060 status = ntohl(*p++); 2040 pglen = xdr->buf->page_len;
2041 hdrlen = (u8 *)xdr->p - (u8 *)xdr->iov->iov_base;
2042 recvd = xdr->buf->len - hdrlen;
2043 if (unlikely(pglen > recvd))
2044 goto out_cheating;
2045out:
2046 xdr_read_pages(xdr, pglen);
2047 return pglen;
2048out_cheating:
2049 dprintk("NFS: server cheating in readdir result: "
2050 "pglen %u > recvd %u\n", pglen, recvd);
2051 pglen = recvd;
2052 goto out;
2053}
1061 2054
1062 p = xdr_decode_post_op_attr(p, res->fattr); 2055static int decode_readdir3resok(struct xdr_stream *xdr,
1063 if (status != 0) 2056 struct nfs3_readdirres *result)
1064 return nfs_stat_to_errno(status); 2057{
1065 res->max_link = ntohl(*p++); 2058 int error;
1066 res->max_namelen = ntohl(*p++); 2059
2060 error = decode_post_op_attr(xdr, result->dir_attr);
2061 if (unlikely(error))
2062 goto out;
2063 /* XXX: do we need to check if result->verf != NULL ? */
2064 error = decode_cookieverf3(xdr, result->verf);
2065 if (unlikely(error))
2066 goto out;
2067 error = decode_dirlist3(xdr);
2068out:
2069 return error;
2070}
1067 2071
1068 /* ignore remaining fields */ 2072static int nfs3_xdr_dec_readdir3res(struct rpc_rqst *req,
1069 return 0; 2073 struct xdr_stream *xdr,
2074 struct nfs3_readdirres *result)
2075{
2076 enum nfs_stat status;
2077 int error;
2078
2079 error = decode_nfsstat3(xdr, &status);
2080 if (unlikely(error))
2081 goto out;
2082 if (status != NFS3_OK)
2083 goto out_default;
2084 error = decode_readdir3resok(xdr, result);
2085out:
2086 return error;
2087out_default:
2088 error = decode_post_op_attr(xdr, result->dir_attr);
2089 if (unlikely(error))
2090 goto out;
2091 return nfs_stat_to_errno(status);
1070} 2092}
1071 2093
1072/* 2094/*
1073 * Decode COMMIT reply 2095 * 3.3.18 FSSTAT3res
2096 *
2097 * struct FSSTAT3resok {
2098 * post_op_attr obj_attributes;
2099 * size3 tbytes;
2100 * size3 fbytes;
2101 * size3 abytes;
2102 * size3 tfiles;
2103 * size3 ffiles;
2104 * size3 afiles;
2105 * uint32 invarsec;
2106 * };
2107 *
2108 * struct FSSTAT3resfail {
2109 * post_op_attr obj_attributes;
2110 * };
2111 *
2112 * union FSSTAT3res switch (nfsstat3 status) {
2113 * case NFS3_OK:
2114 * FSSTAT3resok resok;
2115 * default:
2116 * FSSTAT3resfail resfail;
2117 * };
1074 */ 2118 */
1075static int 2119static int decode_fsstat3resok(struct xdr_stream *xdr,
1076nfs3_xdr_commitres(struct rpc_rqst *req, __be32 *p, struct nfs_writeres *res) 2120 struct nfs_fsstat *result)
1077{ 2121{
1078 int status; 2122 __be32 *p;
2123
2124 p = xdr_inline_decode(xdr, 8 * 6 + 4);
2125 if (unlikely(p == NULL))
2126 goto out_overflow;
2127 p = xdr_decode_size3(p, &result->tbytes);
2128 p = xdr_decode_size3(p, &result->fbytes);
2129 p = xdr_decode_size3(p, &result->abytes);
2130 p = xdr_decode_size3(p, &result->tfiles);
2131 p = xdr_decode_size3(p, &result->ffiles);
2132 xdr_decode_size3(p, &result->afiles);
2133 /* ignore invarsec */
2134 return 0;
2135out_overflow:
2136 print_overflow_msg(__func__, xdr);
2137 return -EIO;
2138}
1079 2139
1080 status = ntohl(*p++); 2140static int nfs3_xdr_dec_fsstat3res(struct rpc_rqst *req,
1081 p = xdr_decode_wcc_data(p, res->fattr); 2141 struct xdr_stream *xdr,
1082 if (status != 0) 2142 struct nfs_fsstat *result)
1083 return nfs_stat_to_errno(status); 2143{
2144 enum nfs_stat status;
2145 int error;
2146
2147 error = decode_nfsstat3(xdr, &status);
2148 if (unlikely(error))
2149 goto out;
2150 error = decode_post_op_attr(xdr, result->fattr);
2151 if (unlikely(error))
2152 goto out;
2153 if (status != NFS3_OK)
2154 goto out_status;
2155 error = decode_fsstat3resok(xdr, result);
2156out:
2157 return error;
2158out_status:
2159 return nfs_stat_to_errno(status);
2160}
1084 2161
1085 res->verf->verifier[0] = *p++; 2162/*
1086 res->verf->verifier[1] = *p++; 2163 * 3.3.19 FSINFO3res
2164 *
2165 * struct FSINFO3resok {
2166 * post_op_attr obj_attributes;
2167 * uint32 rtmax;
2168 * uint32 rtpref;
2169 * uint32 rtmult;
2170 * uint32 wtmax;
2171 * uint32 wtpref;
2172 * uint32 wtmult;
2173 * uint32 dtpref;
2174 * size3 maxfilesize;
2175 * nfstime3 time_delta;
2176 * uint32 properties;
2177 * };
2178 *
2179 * struct FSINFO3resfail {
2180 * post_op_attr obj_attributes;
2181 * };
2182 *
2183 * union FSINFO3res switch (nfsstat3 status) {
2184 * case NFS3_OK:
2185 * FSINFO3resok resok;
2186 * default:
2187 * FSINFO3resfail resfail;
2188 * };
2189 */
2190static int decode_fsinfo3resok(struct xdr_stream *xdr,
2191 struct nfs_fsinfo *result)
2192{
2193 __be32 *p;
2194
2195 p = xdr_inline_decode(xdr, 4 * 7 + 8 + 8 + 4);
2196 if (unlikely(p == NULL))
2197 goto out_overflow;
2198 result->rtmax = be32_to_cpup(p++);
2199 result->rtpref = be32_to_cpup(p++);
2200 result->rtmult = be32_to_cpup(p++);
2201 result->wtmax = be32_to_cpup(p++);
2202 result->wtpref = be32_to_cpup(p++);
2203 result->wtmult = be32_to_cpup(p++);
2204 result->dtpref = be32_to_cpup(p++);
2205 p = xdr_decode_size3(p, &result->maxfilesize);
2206 xdr_decode_nfstime3(p, &result->time_delta);
2207
2208 /* ignore properties */
2209 result->lease_time = 0;
1087 return 0; 2210 return 0;
2211out_overflow:
2212 print_overflow_msg(__func__, xdr);
2213 return -EIO;
2214}
2215
2216static int nfs3_xdr_dec_fsinfo3res(struct rpc_rqst *req,
2217 struct xdr_stream *xdr,
2218 struct nfs_fsinfo *result)
2219{
2220 enum nfs_stat status;
2221 int error;
2222
2223 error = decode_nfsstat3(xdr, &status);
2224 if (unlikely(error))
2225 goto out;
2226 error = decode_post_op_attr(xdr, result->fattr);
2227 if (unlikely(error))
2228 goto out;
2229 if (status != NFS3_OK)
2230 goto out_status;
2231 error = decode_fsinfo3resok(xdr, result);
2232out:
2233 return error;
2234out_status:
2235 return nfs_stat_to_errno(status);
1088} 2236}
1089 2237
1090#ifdef CONFIG_NFS_V3_ACL
1091/* 2238/*
1092 * Decode GETACL reply 2239 * 3.3.20 PATHCONF3res
2240 *
2241 * struct PATHCONF3resok {
2242 * post_op_attr obj_attributes;
2243 * uint32 linkmax;
2244 * uint32 name_max;
2245 * bool no_trunc;
2246 * bool chown_restricted;
2247 * bool case_insensitive;
2248 * bool case_preserving;
2249 * };
2250 *
2251 * struct PATHCONF3resfail {
2252 * post_op_attr obj_attributes;
2253 * };
2254 *
2255 * union PATHCONF3res switch (nfsstat3 status) {
2256 * case NFS3_OK:
2257 * PATHCONF3resok resok;
2258 * default:
2259 * PATHCONF3resfail resfail;
2260 * };
1093 */ 2261 */
1094static int 2262static int decode_pathconf3resok(struct xdr_stream *xdr,
1095nfs3_xdr_getaclres(struct rpc_rqst *req, __be32 *p, 2263 struct nfs_pathconf *result)
1096 struct nfs3_getaclres *res)
1097{ 2264{
1098 struct xdr_buf *buf = &req->rq_rcv_buf; 2265 __be32 *p;
1099 int status = ntohl(*p++);
1100 struct posix_acl **acl;
1101 unsigned int *aclcnt;
1102 int err, base;
1103
1104 if (status != 0)
1105 return nfs_stat_to_errno(status);
1106 p = xdr_decode_post_op_attr(p, res->fattr);
1107 res->mask = ntohl(*p++);
1108 if (res->mask & ~(NFS_ACL|NFS_ACLCNT|NFS_DFACL|NFS_DFACLCNT))
1109 return -EINVAL;
1110 base = (char *)p - (char *)req->rq_rcv_buf.head->iov_base;
1111 2266
1112 acl = (res->mask & NFS_ACL) ? &res->acl_access : NULL; 2267 p = xdr_inline_decode(xdr, 4 * 6);
1113 aclcnt = (res->mask & NFS_ACLCNT) ? &res->acl_access_count : NULL; 2268 if (unlikely(p == NULL))
1114 err = nfsacl_decode(buf, base, aclcnt, acl); 2269 goto out_overflow;
2270 result->max_link = be32_to_cpup(p++);
2271 result->max_namelen = be32_to_cpup(p);
2272 /* ignore remaining fields */
2273 return 0;
2274out_overflow:
2275 print_overflow_msg(__func__, xdr);
2276 return -EIO;
2277}
1115 2278
1116 acl = (res->mask & NFS_DFACL) ? &res->acl_default : NULL; 2279static int nfs3_xdr_dec_pathconf3res(struct rpc_rqst *req,
1117 aclcnt = (res->mask & NFS_DFACLCNT) ? &res->acl_default_count : NULL; 2280 struct xdr_stream *xdr,
1118 if (err > 0) 2281 struct nfs_pathconf *result)
1119 err = nfsacl_decode(buf, base + err, aclcnt, acl); 2282{
1120 return (err > 0) ? 0 : err; 2283 enum nfs_stat status;
2284 int error;
2285
2286 error = decode_nfsstat3(xdr, &status);
2287 if (unlikely(error))
2288 goto out;
2289 error = decode_post_op_attr(xdr, result->fattr);
2290 if (unlikely(error))
2291 goto out;
2292 if (status != NFS3_OK)
2293 goto out_status;
2294 error = decode_pathconf3resok(xdr, result);
2295out:
2296 return error;
2297out_status:
2298 return nfs_stat_to_errno(status);
1121} 2299}
1122 2300
1123/* 2301/*
1124 * Decode setacl reply. 2302 * 3.3.21 COMMIT3res
2303 *
2304 * struct COMMIT3resok {
2305 * wcc_data file_wcc;
2306 * writeverf3 verf;
2307 * };
2308 *
2309 * struct COMMIT3resfail {
2310 * wcc_data file_wcc;
2311 * };
2312 *
2313 * union COMMIT3res switch (nfsstat3 status) {
2314 * case NFS3_OK:
2315 * COMMIT3resok resok;
2316 * default:
2317 * COMMIT3resfail resfail;
2318 * };
1125 */ 2319 */
1126static int 2320static int nfs3_xdr_dec_commit3res(struct rpc_rqst *req,
1127nfs3_xdr_setaclres(struct rpc_rqst *req, __be32 *p, struct nfs_fattr *fattr) 2321 struct xdr_stream *xdr,
2322 struct nfs_writeres *result)
1128{ 2323{
1129 int status = ntohl(*p++); 2324 enum nfs_stat status;
2325 int error;
2326
2327 error = decode_nfsstat3(xdr, &status);
2328 if (unlikely(error))
2329 goto out;
2330 error = decode_wcc_data(xdr, result->fattr);
2331 if (unlikely(error))
2332 goto out;
2333 if (status != NFS3_OK)
2334 goto out_status;
2335 error = decode_writeverf3(xdr, result->verf->verifier);
2336out:
2337 return error;
2338out_status:
2339 return nfs_stat_to_errno(status);
2340}
1130 2341
1131 if (status) 2342#ifdef CONFIG_NFS_V3_ACL
1132 return nfs_stat_to_errno(status); 2343
1133 xdr_decode_post_op_attr(p, fattr); 2344static inline int decode_getacl3resok(struct xdr_stream *xdr,
1134 return 0; 2345 struct nfs3_getaclres *result)
2346{
2347 struct posix_acl **acl;
2348 unsigned int *aclcnt;
2349 size_t hdrlen;
2350 int error;
2351
2352 error = decode_post_op_attr(xdr, result->fattr);
2353 if (unlikely(error))
2354 goto out;
2355 error = decode_uint32(xdr, &result->mask);
2356 if (unlikely(error))
2357 goto out;
2358 error = -EINVAL;
2359 if (result->mask & ~(NFS_ACL|NFS_ACLCNT|NFS_DFACL|NFS_DFACLCNT))
2360 goto out;
2361
2362 hdrlen = (u8 *)xdr->p - (u8 *)xdr->iov->iov_base;
2363
2364 acl = NULL;
2365 if (result->mask & NFS_ACL)
2366 acl = &result->acl_access;
2367 aclcnt = NULL;
2368 if (result->mask & NFS_ACLCNT)
2369 aclcnt = &result->acl_access_count;
2370 error = nfsacl_decode(xdr->buf, hdrlen, aclcnt, acl);
2371 if (unlikely(error <= 0))
2372 goto out;
2373
2374 acl = NULL;
2375 if (result->mask & NFS_DFACL)
2376 acl = &result->acl_default;
2377 aclcnt = NULL;
2378 if (result->mask & NFS_DFACLCNT)
2379 aclcnt = &result->acl_default_count;
2380 error = nfsacl_decode(xdr->buf, hdrlen + error, aclcnt, acl);
2381 if (unlikely(error <= 0))
2382 return error;
2383 error = 0;
2384out:
2385 return error;
2386}
2387
2388static int nfs3_xdr_dec_getacl3res(struct rpc_rqst *req,
2389 struct xdr_stream *xdr,
2390 struct nfs3_getaclres *result)
2391{
2392 enum nfs_stat status;
2393 int error;
2394
2395 error = decode_nfsstat3(xdr, &status);
2396 if (unlikely(error))
2397 goto out;
2398 if (status != NFS3_OK)
2399 goto out_default;
2400 error = decode_getacl3resok(xdr, result);
2401out:
2402 return error;
2403out_default:
2404 return nfs_stat_to_errno(status);
1135} 2405}
2406
2407static int nfs3_xdr_dec_setacl3res(struct rpc_rqst *req,
2408 struct xdr_stream *xdr,
2409 struct nfs_fattr *result)
2410{
2411 enum nfs_stat status;
2412 int error;
2413
2414 error = decode_nfsstat3(xdr, &status);
2415 if (unlikely(error))
2416 goto out;
2417 if (status != NFS3_OK)
2418 goto out_default;
2419 error = decode_post_op_attr(xdr, result);
2420out:
2421 return error;
2422out_default:
2423 return nfs_stat_to_errno(status);
2424}
2425
1136#endif /* CONFIG_NFS_V3_ACL */ 2426#endif /* CONFIG_NFS_V3_ACL */
1137 2427
1138#define PROC(proc, argtype, restype, timer) \ 2428#define PROC(proc, argtype, restype, timer) \
1139[NFS3PROC_##proc] = { \ 2429[NFS3PROC_##proc] = { \
1140 .p_proc = NFS3PROC_##proc, \ 2430 .p_proc = NFS3PROC_##proc, \
1141 .p_encode = (kxdrproc_t) nfs3_xdr_##argtype, \ 2431 .p_encode = (kxdreproc_t)nfs3_xdr_enc_##argtype##3args, \
1142 .p_decode = (kxdrproc_t) nfs3_xdr_##restype, \ 2432 .p_decode = (kxdrdproc_t)nfs3_xdr_dec_##restype##3res, \
1143 .p_arglen = NFS3_##argtype##_sz, \ 2433 .p_arglen = NFS3_##argtype##args_sz, \
1144 .p_replen = NFS3_##restype##_sz, \ 2434 .p_replen = NFS3_##restype##res_sz, \
1145 .p_timer = timer, \ 2435 .p_timer = timer, \
1146 .p_statidx = NFS3PROC_##proc, \ 2436 .p_statidx = NFS3PROC_##proc, \
1147 .p_name = #proc, \ 2437 .p_name = #proc, \
1148 } 2438 }
1149 2439
1150struct rpc_procinfo nfs3_procedures[] = { 2440struct rpc_procinfo nfs3_procedures[] = {
1151 PROC(GETATTR, fhandle, attrstat, 1), 2441 PROC(GETATTR, getattr, getattr, 1),
1152 PROC(SETATTR, sattrargs, wccstat, 0), 2442 PROC(SETATTR, setattr, setattr, 0),
1153 PROC(LOOKUP, diropargs, lookupres, 2), 2443 PROC(LOOKUP, lookup, lookup, 2),
1154 PROC(ACCESS, accessargs, accessres, 1), 2444 PROC(ACCESS, access, access, 1),
1155 PROC(READLINK, readlinkargs, readlinkres, 3), 2445 PROC(READLINK, readlink, readlink, 3),
1156 PROC(READ, readargs, readres, 3), 2446 PROC(READ, read, read, 3),
1157 PROC(WRITE, writeargs, writeres, 4), 2447 PROC(WRITE, write, write, 4),
1158 PROC(CREATE, createargs, createres, 0), 2448 PROC(CREATE, create, create, 0),
1159 PROC(MKDIR, mkdirargs, createres, 0), 2449 PROC(MKDIR, mkdir, create, 0),
1160 PROC(SYMLINK, symlinkargs, createres, 0), 2450 PROC(SYMLINK, symlink, create, 0),
1161 PROC(MKNOD, mknodargs, createres, 0), 2451 PROC(MKNOD, mknod, create, 0),
1162 PROC(REMOVE, removeargs, removeres, 0), 2452 PROC(REMOVE, remove, remove, 0),
1163 PROC(RMDIR, diropargs, wccstat, 0), 2453 PROC(RMDIR, lookup, setattr, 0),
1164 PROC(RENAME, renameargs, renameres, 0), 2454 PROC(RENAME, rename, rename, 0),
1165 PROC(LINK, linkargs, linkres, 0), 2455 PROC(LINK, link, link, 0),
1166 PROC(READDIR, readdirargs, readdirres, 3), 2456 PROC(READDIR, readdir, readdir, 3),
1167 PROC(READDIRPLUS, readdirargs, readdirres, 3), 2457 PROC(READDIRPLUS, readdirplus, readdir, 3),
1168 PROC(FSSTAT, fhandle, fsstatres, 0), 2458 PROC(FSSTAT, getattr, fsstat, 0),
1169 PROC(FSINFO, fhandle, fsinfores, 0), 2459 PROC(FSINFO, getattr, fsinfo, 0),
1170 PROC(PATHCONF, fhandle, pathconfres, 0), 2460 PROC(PATHCONF, getattr, pathconf, 0),
1171 PROC(COMMIT, commitargs, commitres, 5), 2461 PROC(COMMIT, commit, commit, 5),
1172}; 2462};
1173 2463
1174struct rpc_version nfs_version3 = { 2464struct rpc_version nfs_version3 = {
@@ -1181,8 +2471,8 @@ struct rpc_version nfs_version3 = {
1181static struct rpc_procinfo nfs3_acl_procedures[] = { 2471static struct rpc_procinfo nfs3_acl_procedures[] = {
1182 [ACLPROC3_GETACL] = { 2472 [ACLPROC3_GETACL] = {
1183 .p_proc = ACLPROC3_GETACL, 2473 .p_proc = ACLPROC3_GETACL,
1184 .p_encode = (kxdrproc_t) nfs3_xdr_getaclargs, 2474 .p_encode = (kxdreproc_t)nfs3_xdr_enc_getacl3args,
1185 .p_decode = (kxdrproc_t) nfs3_xdr_getaclres, 2475 .p_decode = (kxdrdproc_t)nfs3_xdr_dec_getacl3res,
1186 .p_arglen = ACL3_getaclargs_sz, 2476 .p_arglen = ACL3_getaclargs_sz,
1187 .p_replen = ACL3_getaclres_sz, 2477 .p_replen = ACL3_getaclres_sz,
1188 .p_timer = 1, 2478 .p_timer = 1,
@@ -1190,8 +2480,8 @@ static struct rpc_procinfo nfs3_acl_procedures[] = {
1190 }, 2480 },
1191 [ACLPROC3_SETACL] = { 2481 [ACLPROC3_SETACL] = {
1192 .p_proc = ACLPROC3_SETACL, 2482 .p_proc = ACLPROC3_SETACL,
1193 .p_encode = (kxdrproc_t) nfs3_xdr_setaclargs, 2483 .p_encode = (kxdreproc_t)nfs3_xdr_enc_setacl3args,
1194 .p_decode = (kxdrproc_t) nfs3_xdr_setaclres, 2484 .p_decode = (kxdrdproc_t)nfs3_xdr_dec_setacl3res,
1195 .p_arglen = ACL3_setaclargs_sz, 2485 .p_arglen = ACL3_setaclargs_sz,
1196 .p_replen = ACL3_setaclres_sz, 2486 .p_replen = ACL3_setaclres_sz,
1197 .p_timer = 0, 2487 .p_timer = 0,
generated by cgit v1.2.2 (git 2.25.0) at 2025-09-13 10:47:09 -0400