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Commit | Line | Data |
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b2441318 | 1 | // SPDX-License-Identifier: GPL-2.0 |
1da177e4 LT |
2 | /* |
3 | * linux/fs/nfs/nfs3xdr.c | |
4 | * | |
5 | * XDR functions to encode/decode NFSv3 RPC arguments and results. | |
6 | * | |
7 | * Copyright (C) 1996, 1997 Olaf Kirch | |
8 | */ | |
9 | ||
10 | #include <linux/param.h> | |
11 | #include <linux/time.h> | |
12 | #include <linux/mm.h> | |
1da177e4 LT |
13 | #include <linux/errno.h> |
14 | #include <linux/string.h> | |
15 | #include <linux/in.h> | |
16 | #include <linux/pagemap.h> | |
17 | #include <linux/proc_fs.h> | |
18 | #include <linux/kdev_t.h> | |
19 | #include <linux/sunrpc/clnt.h> | |
20 | #include <linux/nfs.h> | |
21 | #include <linux/nfs3.h> | |
22 | #include <linux/nfs_fs.h> | |
b7fa0554 | 23 | #include <linux/nfsacl.h> |
f23f6584 | 24 | #include "nfstrace.h" |
f7b422b1 | 25 | #include "internal.h" |
1da177e4 LT |
26 | |
27 | #define NFSDBG_FACILITY NFSDBG_XDR | |
28 | ||
29 | /* Mapping from NFS error code to "errno" error code. */ | |
30 | #define errno_NFSERR_IO EIO | |
31 | ||
1da177e4 LT |
32 | /* |
33 | * Declare the space requirements for NFS arguments and replies as | |
34 | * number of 32bit-words | |
35 | */ | |
9ed5af26 | 36 | #define NFS3_pagepad_sz (1) /* Page padding */ |
1da177e4 LT |
37 | #define NFS3_fhandle_sz (1+16) |
38 | #define NFS3_fh_sz (NFS3_fhandle_sz) /* shorthand */ | |
ad3dbe35 | 39 | #define NFS3_post_op_fh_sz (1+NFS3_fh_sz) |
1da177e4 LT |
40 | #define NFS3_sattr_sz (15) |
41 | #define NFS3_filename_sz (1+(NFS3_MAXNAMLEN>>2)) | |
42 | #define NFS3_path_sz (1+(NFS3_MAXPATHLEN>>2)) | |
43 | #define NFS3_fattr_sz (21) | |
d9c407b1 | 44 | #define NFS3_cookieverf_sz (NFS3_COOKIEVERFSIZE>>2) |
f5fc3c50 | 45 | #define NFS3_wcc_attr_sz (6) |
1da177e4 LT |
46 | #define NFS3_pre_op_attr_sz (1+NFS3_wcc_attr_sz) |
47 | #define NFS3_post_op_attr_sz (1+NFS3_fattr_sz) | |
f5fc3c50 | 48 | #define NFS3_wcc_data_sz (NFS3_pre_op_attr_sz+NFS3_post_op_attr_sz) |
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 | ||
f5fc3c50 CL |
69 | #define NFS3_getattrres_sz (1+NFS3_fattr_sz) |
70 | #define NFS3_setattrres_sz (1+NFS3_wcc_data_sz) | |
71 | #define NFS3_removeres_sz (NFS3_setattrres_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) | |
9ed5af26 TM |
74 | #define NFS3_readlinkres_sz (1+NFS3_post_op_attr_sz+1+NFS3_pagepad_sz) |
75 | #define NFS3_readres_sz (1+NFS3_post_op_attr_sz+3+NFS3_pagepad_sz) | |
1da177e4 | 76 | #define NFS3_writeres_sz (1+NFS3_wcc_data_sz+4) |
ad3dbe35 | 77 | #define NFS3_createres_sz (1+NFS3_post_op_fh_sz+NFS3_post_op_attr_sz+NFS3_wcc_data_sz) |
1da177e4 LT |
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) | |
9ed5af26 | 80 | #define NFS3_readdirres_sz (1+NFS3_post_op_attr_sz+2+NFS3_pagepad_sz) |
1da177e4 LT |
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+ \ | |
9ed5af26 TM |
90 | XDR_QUADLEN(NFS_ACL_INLINE_BUFSIZE)+\ |
91 | NFS3_pagepad_sz) | |
b7fa0554 AG |
92 | #define ACL3_setaclres_sz (1+NFS3_post_op_attr_sz) |
93 | ||
5e7e5a0d BS |
94 | static int nfs3_stat_to_errno(enum nfs_stat); |
95 | ||
1da177e4 LT |
96 | /* |
97 | * Map file type to S_IFMT bits | |
98 | */ | |
bca79478 TM |
99 | static const umode_t nfs_type2fmt[] = { |
100 | [NF3BAD] = 0, | |
101 | [NF3REG] = S_IFREG, | |
102 | [NF3DIR] = S_IFDIR, | |
103 | [NF3BLK] = S_IFBLK, | |
104 | [NF3CHR] = S_IFCHR, | |
105 | [NF3LNK] = S_IFLNK, | |
106 | [NF3SOCK] = S_IFSOCK, | |
107 | [NF3FIFO] = S_IFIFO, | |
1da177e4 LT |
108 | }; |
109 | ||
264d948c TM |
110 | static struct user_namespace *rpc_userns(const struct rpc_clnt *clnt) |
111 | { | |
112 | if (clnt && clnt->cl_cred) | |
113 | return clnt->cl_cred->user_ns; | |
114 | return &init_user_ns; | |
115 | } | |
116 | ||
117 | static struct user_namespace *rpc_rqst_userns(const struct rpc_rqst *rqstp) | |
118 | { | |
119 | if (rqstp->rq_task) | |
120 | return rpc_userns(rqstp->rq_task->tk_client); | |
121 | return &init_user_ns; | |
122 | } | |
123 | ||
d9c407b1 CL |
124 | /* |
125 | * Encode/decode NFSv3 basic data types | |
126 | * | |
127 | * Basic NFSv3 data types are defined in section 2.5 of RFC 1813: | |
128 | * "NFS Version 3 Protocol Specification". | |
129 | * | |
130 | * Not all basic data types have their own encoding and decoding | |
131 | * functions. For run-time efficiency, some data types are encoded | |
132 | * or decoded inline. | |
133 | */ | |
134 | ||
135 | static void encode_uint32(struct xdr_stream *xdr, u32 value) | |
136 | { | |
137 | __be32 *p = xdr_reserve_space(xdr, 4); | |
138 | *p = cpu_to_be32(value); | |
139 | } | |
140 | ||
e4f93234 CL |
141 | static int decode_uint32(struct xdr_stream *xdr, u32 *value) |
142 | { | |
143 | __be32 *p; | |
144 | ||
145 | p = xdr_inline_decode(xdr, 4); | |
eb72f484 CL |
146 | if (unlikely(!p)) |
147 | return -EIO; | |
e4f93234 CL |
148 | *value = be32_to_cpup(p); |
149 | return 0; | |
e4f93234 CL |
150 | } |
151 | ||
152 | static int decode_uint64(struct xdr_stream *xdr, u64 *value) | |
153 | { | |
154 | __be32 *p; | |
155 | ||
156 | p = xdr_inline_decode(xdr, 8); | |
eb72f484 CL |
157 | if (unlikely(!p)) |
158 | return -EIO; | |
e4f93234 CL |
159 | xdr_decode_hyper(p, value); |
160 | return 0; | |
e4f93234 CL |
161 | } |
162 | ||
163 | /* | |
164 | * fileid3 | |
165 | * | |
166 | * typedef uint64 fileid3; | |
167 | */ | |
f6048709 CL |
168 | static __be32 *xdr_decode_fileid3(__be32 *p, u64 *fileid) |
169 | { | |
170 | return xdr_decode_hyper(p, fileid); | |
171 | } | |
172 | ||
e4f93234 CL |
173 | static int decode_fileid3(struct xdr_stream *xdr, u64 *fileid) |
174 | { | |
175 | return decode_uint64(xdr, fileid); | |
176 | } | |
177 | ||
d9c407b1 CL |
178 | /* |
179 | * filename3 | |
180 | * | |
181 | * typedef string filename3<>; | |
182 | */ | |
183 | static void encode_filename3(struct xdr_stream *xdr, | |
184 | const char *name, u32 length) | |
185 | { | |
186 | __be32 *p; | |
187 | ||
7fc38846 | 188 | WARN_ON_ONCE(length > NFS3_MAXNAMLEN); |
d9c407b1 CL |
189 | p = xdr_reserve_space(xdr, 4 + length); |
190 | xdr_encode_opaque(p, name, length); | |
191 | } | |
192 | ||
e4f93234 CL |
193 | static int decode_inline_filename3(struct xdr_stream *xdr, |
194 | const char **name, u32 *length) | |
195 | { | |
196 | __be32 *p; | |
197 | u32 count; | |
198 | ||
199 | p = xdr_inline_decode(xdr, 4); | |
eb72f484 CL |
200 | if (unlikely(!p)) |
201 | return -EIO; | |
e4f93234 CL |
202 | count = be32_to_cpup(p); |
203 | if (count > NFS3_MAXNAMLEN) | |
204 | goto out_nametoolong; | |
205 | p = xdr_inline_decode(xdr, count); | |
eb72f484 CL |
206 | if (unlikely(!p)) |
207 | return -EIO; | |
e4f93234 CL |
208 | *name = (const char *)p; |
209 | *length = count; | |
210 | return 0; | |
211 | ||
212 | out_nametoolong: | |
213 | dprintk("NFS: returned filename too long: %u\n", count); | |
214 | return -ENAMETOOLONG; | |
e4f93234 CL |
215 | } |
216 | ||
d9c407b1 CL |
217 | /* |
218 | * nfspath3 | |
219 | * | |
220 | * typedef string nfspath3<>; | |
221 | */ | |
222 | static void encode_nfspath3(struct xdr_stream *xdr, struct page **pages, | |
223 | const u32 length) | |
224 | { | |
d9c407b1 CL |
225 | encode_uint32(xdr, length); |
226 | xdr_write_pages(xdr, pages, 0, length); | |
227 | } | |
228 | ||
e4f93234 CL |
229 | static int decode_nfspath3(struct xdr_stream *xdr) |
230 | { | |
231 | u32 recvd, count; | |
e4f93234 CL |
232 | __be32 *p; |
233 | ||
234 | p = xdr_inline_decode(xdr, 4); | |
eb72f484 CL |
235 | if (unlikely(!p)) |
236 | return -EIO; | |
e4f93234 CL |
237 | count = be32_to_cpup(p); |
238 | if (unlikely(count >= xdr->buf->page_len || count > NFS3_MAXPATHLEN)) | |
239 | goto out_nametoolong; | |
64bd577e | 240 | recvd = xdr_read_pages(xdr, count); |
e4f93234 CL |
241 | if (unlikely(count > recvd)) |
242 | goto out_cheating; | |
e4f93234 CL |
243 | xdr_terminate_string(xdr->buf, count); |
244 | return 0; | |
245 | ||
246 | out_nametoolong: | |
247 | dprintk("NFS: returned pathname too long: %u\n", count); | |
248 | return -ENAMETOOLONG; | |
249 | out_cheating: | |
250 | dprintk("NFS: server cheating in pathname result: " | |
251 | "count %u > recvd %u\n", count, recvd); | |
252 | return -EIO; | |
e4f93234 CL |
253 | } |
254 | ||
d9c407b1 CL |
255 | /* |
256 | * cookie3 | |
257 | * | |
258 | * typedef uint64 cookie3 | |
259 | */ | |
260 | static __be32 *xdr_encode_cookie3(__be32 *p, u64 cookie) | |
261 | { | |
262 | return xdr_encode_hyper(p, cookie); | |
263 | } | |
264 | ||
e4f93234 CL |
265 | static int decode_cookie3(struct xdr_stream *xdr, u64 *cookie) |
266 | { | |
267 | return decode_uint64(xdr, cookie); | |
268 | } | |
269 | ||
d9c407b1 CL |
270 | /* |
271 | * cookieverf3 | |
272 | * | |
273 | * typedef opaque cookieverf3[NFS3_COOKIEVERFSIZE]; | |
274 | */ | |
275 | static __be32 *xdr_encode_cookieverf3(__be32 *p, const __be32 *verifier) | |
276 | { | |
277 | memcpy(p, verifier, NFS3_COOKIEVERFSIZE); | |
278 | return p + XDR_QUADLEN(NFS3_COOKIEVERFSIZE); | |
279 | } | |
280 | ||
e4f93234 CL |
281 | static int decode_cookieverf3(struct xdr_stream *xdr, __be32 *verifier) |
282 | { | |
283 | __be32 *p; | |
284 | ||
285 | p = xdr_inline_decode(xdr, NFS3_COOKIEVERFSIZE); | |
eb72f484 CL |
286 | if (unlikely(!p)) |
287 | return -EIO; | |
e4f93234 CL |
288 | memcpy(verifier, p, NFS3_COOKIEVERFSIZE); |
289 | return 0; | |
e4f93234 CL |
290 | } |
291 | ||
d9c407b1 CL |
292 | /* |
293 | * createverf3 | |
294 | * | |
295 | * typedef opaque createverf3[NFS3_CREATEVERFSIZE]; | |
296 | */ | |
297 | static void encode_createverf3(struct xdr_stream *xdr, const __be32 *verifier) | |
298 | { | |
299 | __be32 *p; | |
300 | ||
301 | p = xdr_reserve_space(xdr, NFS3_CREATEVERFSIZE); | |
302 | memcpy(p, verifier, NFS3_CREATEVERFSIZE); | |
303 | } | |
304 | ||
2f2c63bc | 305 | static int decode_writeverf3(struct xdr_stream *xdr, struct nfs_write_verifier *verifier) |
e4f93234 CL |
306 | { |
307 | __be32 *p; | |
308 | ||
309 | p = xdr_inline_decode(xdr, NFS3_WRITEVERFSIZE); | |
eb72f484 CL |
310 | if (unlikely(!p)) |
311 | return -EIO; | |
2f2c63bc | 312 | memcpy(verifier->data, p, NFS3_WRITEVERFSIZE); |
e4f93234 | 313 | return 0; |
e4f93234 CL |
314 | } |
315 | ||
316 | /* | |
317 | * size3 | |
318 | * | |
319 | * typedef uint64 size3; | |
320 | */ | |
321 | static __be32 *xdr_decode_size3(__be32 *p, u64 *size) | |
322 | { | |
323 | return xdr_decode_hyper(p, size); | |
324 | } | |
325 | ||
326 | /* | |
327 | * nfsstat3 | |
328 | * | |
329 | * enum nfsstat3 { | |
330 | * NFS3_OK = 0, | |
331 | * ... | |
332 | * } | |
333 | */ | |
334 | #define NFS3_OK NFS_OK | |
335 | ||
336 | static int decode_nfsstat3(struct xdr_stream *xdr, enum nfs_stat *status) | |
337 | { | |
338 | __be32 *p; | |
339 | ||
340 | p = xdr_inline_decode(xdr, 4); | |
eb72f484 CL |
341 | if (unlikely(!p)) |
342 | return -EIO; | |
f23f6584 CL |
343 | if (unlikely(*p != cpu_to_be32(NFS3_OK))) |
344 | goto out_status; | |
345 | *status = 0; | |
346 | return 0; | |
347 | out_status: | |
e4f93234 | 348 | *status = be32_to_cpup(p); |
62a92ba9 | 349 | trace_nfs_xdr_status(xdr, (int)*status); |
e4f93234 | 350 | return 0; |
e4f93234 CL |
351 | } |
352 | ||
d9c407b1 CL |
353 | /* |
354 | * ftype3 | |
355 | * | |
356 | * enum ftype3 { | |
357 | * NF3REG = 1, | |
358 | * NF3DIR = 2, | |
359 | * NF3BLK = 3, | |
360 | * NF3CHR = 4, | |
361 | * NF3LNK = 5, | |
362 | * NF3SOCK = 6, | |
363 | * NF3FIFO = 7 | |
364 | * }; | |
365 | */ | |
366 | static void encode_ftype3(struct xdr_stream *xdr, const u32 type) | |
367 | { | |
d9c407b1 CL |
368 | encode_uint32(xdr, type); |
369 | } | |
370 | ||
f6048709 CL |
371 | static __be32 *xdr_decode_ftype3(__be32 *p, umode_t *mode) |
372 | { | |
373 | u32 type; | |
374 | ||
375 | type = be32_to_cpup(p++); | |
376 | if (type > NF3FIFO) | |
377 | type = NF3NON; | |
378 | *mode = nfs_type2fmt[type]; | |
379 | return p; | |
380 | } | |
381 | ||
d9c407b1 CL |
382 | /* |
383 | * specdata3 | |
384 | * | |
385 | * struct specdata3 { | |
386 | * uint32 specdata1; | |
387 | * uint32 specdata2; | |
388 | * }; | |
389 | */ | |
390 | static void encode_specdata3(struct xdr_stream *xdr, const dev_t rdev) | |
391 | { | |
392 | __be32 *p; | |
393 | ||
394 | p = xdr_reserve_space(xdr, 8); | |
395 | *p++ = cpu_to_be32(MAJOR(rdev)); | |
396 | *p = cpu_to_be32(MINOR(rdev)); | |
397 | } | |
398 | ||
f6048709 CL |
399 | static __be32 *xdr_decode_specdata3(__be32 *p, dev_t *rdev) |
400 | { | |
401 | unsigned int major, minor; | |
402 | ||
403 | major = be32_to_cpup(p++); | |
404 | minor = be32_to_cpup(p++); | |
405 | *rdev = MKDEV(major, minor); | |
406 | if (MAJOR(*rdev) != major || MINOR(*rdev) != minor) | |
407 | *rdev = 0; | |
408 | return p; | |
409 | } | |
410 | ||
d9c407b1 CL |
411 | /* |
412 | * nfs_fh3 | |
413 | * | |
414 | * struct nfs_fh3 { | |
415 | * opaque data<NFS3_FHSIZE>; | |
416 | * }; | |
417 | */ | |
418 | static void encode_nfs_fh3(struct xdr_stream *xdr, const struct nfs_fh *fh) | |
419 | { | |
420 | __be32 *p; | |
421 | ||
7fc38846 | 422 | WARN_ON_ONCE(fh->size > NFS3_FHSIZE); |
d9c407b1 CL |
423 | p = xdr_reserve_space(xdr, 4 + fh->size); |
424 | xdr_encode_opaque(p, fh->data, fh->size); | |
425 | } | |
426 | ||
e4f93234 CL |
427 | static int decode_nfs_fh3(struct xdr_stream *xdr, struct nfs_fh *fh) |
428 | { | |
429 | u32 length; | |
430 | __be32 *p; | |
431 | ||
432 | p = xdr_inline_decode(xdr, 4); | |
eb72f484 CL |
433 | if (unlikely(!p)) |
434 | return -EIO; | |
e4f93234 | 435 | length = be32_to_cpup(p++); |
eb3d58c6 | 436 | if (unlikely(length > NFS3_FHSIZE || length == 0)) |
e4f93234 CL |
437 | goto out_toobig; |
438 | p = xdr_inline_decode(xdr, length); | |
eb72f484 CL |
439 | if (unlikely(!p)) |
440 | return -EIO; | |
e4f93234 CL |
441 | fh->size = length; |
442 | memcpy(fh->data, p, length); | |
443 | return 0; | |
444 | out_toobig: | |
eb3d58c6 | 445 | trace_nfs_xdr_bad_filehandle(xdr, NFSERR_BADHANDLE); |
e4f93234 | 446 | return -E2BIG; |
e4f93234 CL |
447 | } |
448 | ||
449 | static void zero_nfs_fh3(struct nfs_fh *fh) | |
450 | { | |
451 | memset(fh, 0, sizeof(*fh)); | |
452 | } | |
453 | ||
9d5a6434 CL |
454 | /* |
455 | * nfstime3 | |
456 | * | |
457 | * struct nfstime3 { | |
458 | * uint32 seconds; | |
459 | * uint32 nseconds; | |
460 | * }; | |
461 | */ | |
6430b323 | 462 | static __be32 *xdr_encode_nfstime3(__be32 *p, const struct timespec64 *timep) |
9d5a6434 | 463 | { |
6430b323 | 464 | *p++ = cpu_to_be32((u32)timep->tv_sec); |
9d5a6434 CL |
465 | *p++ = cpu_to_be32(timep->tv_nsec); |
466 | return p; | |
467 | } | |
468 | ||
e86d5a02 | 469 | static __be32 *xdr_decode_nfstime3(__be32 *p, struct timespec64 *timep) |
f6048709 CL |
470 | { |
471 | timep->tv_sec = be32_to_cpup(p++); | |
472 | timep->tv_nsec = be32_to_cpup(p++); | |
473 | return p; | |
474 | } | |
475 | ||
d9c407b1 CL |
476 | /* |
477 | * sattr3 | |
478 | * | |
479 | * enum time_how { | |
480 | * DONT_CHANGE = 0, | |
481 | * SET_TO_SERVER_TIME = 1, | |
482 | * SET_TO_CLIENT_TIME = 2 | |
483 | * }; | |
484 | * | |
485 | * union set_mode3 switch (bool set_it) { | |
486 | * case TRUE: | |
487 | * mode3 mode; | |
488 | * default: | |
489 | * void; | |
490 | * }; | |
491 | * | |
492 | * union set_uid3 switch (bool set_it) { | |
493 | * case TRUE: | |
494 | * uid3 uid; | |
495 | * default: | |
496 | * void; | |
497 | * }; | |
498 | * | |
499 | * union set_gid3 switch (bool set_it) { | |
500 | * case TRUE: | |
501 | * gid3 gid; | |
502 | * default: | |
503 | * void; | |
504 | * }; | |
505 | * | |
506 | * union set_size3 switch (bool set_it) { | |
507 | * case TRUE: | |
508 | * size3 size; | |
509 | * default: | |
510 | * void; | |
511 | * }; | |
512 | * | |
513 | * union set_atime switch (time_how set_it) { | |
514 | * case SET_TO_CLIENT_TIME: | |
515 | * nfstime3 atime; | |
516 | * default: | |
517 | * void; | |
518 | * }; | |
519 | * | |
520 | * union set_mtime switch (time_how set_it) { | |
521 | * case SET_TO_CLIENT_TIME: | |
522 | * nfstime3 mtime; | |
523 | * default: | |
524 | * void; | |
525 | * }; | |
526 | * | |
527 | * struct sattr3 { | |
528 | * set_mode3 mode; | |
529 | * set_uid3 uid; | |
530 | * set_gid3 gid; | |
531 | * set_size3 size; | |
532 | * set_atime atime; | |
533 | * set_mtime mtime; | |
534 | * }; | |
535 | */ | |
264d948c TM |
536 | static void encode_sattr3(struct xdr_stream *xdr, const struct iattr *attr, |
537 | struct user_namespace *userns) | |
d9c407b1 CL |
538 | { |
539 | u32 nbytes; | |
540 | __be32 *p; | |
541 | ||
542 | /* | |
543 | * In order to make only a single xdr_reserve_space() call, | |
544 | * pre-compute the total number of bytes to be reserved. | |
545 | * Six boolean values, one for each set_foo field, are always | |
546 | * present in the encoded result, so start there. | |
547 | */ | |
548 | nbytes = 6 * 4; | |
549 | if (attr->ia_valid & ATTR_MODE) | |
550 | nbytes += 4; | |
551 | if (attr->ia_valid & ATTR_UID) | |
552 | nbytes += 4; | |
553 | if (attr->ia_valid & ATTR_GID) | |
554 | nbytes += 4; | |
555 | if (attr->ia_valid & ATTR_SIZE) | |
556 | nbytes += 8; | |
557 | if (attr->ia_valid & ATTR_ATIME_SET) | |
558 | nbytes += 8; | |
559 | if (attr->ia_valid & ATTR_MTIME_SET) | |
560 | nbytes += 8; | |
561 | p = xdr_reserve_space(xdr, nbytes); | |
562 | ||
9d5a6434 CL |
563 | if (attr->ia_valid & ATTR_MODE) { |
564 | *p++ = xdr_one; | |
565 | *p++ = cpu_to_be32(attr->ia_mode & S_IALLUGO); | |
566 | } else | |
567 | *p++ = xdr_zero; | |
568 | ||
569 | if (attr->ia_valid & ATTR_UID) { | |
570 | *p++ = xdr_one; | |
264d948c | 571 | *p++ = cpu_to_be32(from_kuid_munged(userns, attr->ia_uid)); |
9d5a6434 CL |
572 | } else |
573 | *p++ = xdr_zero; | |
574 | ||
575 | if (attr->ia_valid & ATTR_GID) { | |
576 | *p++ = xdr_one; | |
264d948c | 577 | *p++ = cpu_to_be32(from_kgid_munged(userns, attr->ia_gid)); |
9d5a6434 CL |
578 | } else |
579 | *p++ = xdr_zero; | |
580 | ||
581 | if (attr->ia_valid & ATTR_SIZE) { | |
582 | *p++ = xdr_one; | |
583 | p = xdr_encode_hyper(p, (u64)attr->ia_size); | |
584 | } else | |
585 | *p++ = xdr_zero; | |
586 | ||
587 | if (attr->ia_valid & ATTR_ATIME_SET) { | |
588 | *p++ = xdr_two; | |
6430b323 | 589 | p = xdr_encode_nfstime3(p, &attr->ia_atime); |
9d5a6434 CL |
590 | } else if (attr->ia_valid & ATTR_ATIME) { |
591 | *p++ = xdr_one; | |
592 | } else | |
593 | *p++ = xdr_zero; | |
594 | ||
595 | if (attr->ia_valid & ATTR_MTIME_SET) { | |
596 | *p++ = xdr_two; | |
6430b323 | 597 | xdr_encode_nfstime3(p, &attr->ia_mtime); |
9d5a6434 CL |
598 | } else if (attr->ia_valid & ATTR_MTIME) { |
599 | *p = xdr_one; | |
600 | } else | |
601 | *p = xdr_zero; | |
d9c407b1 CL |
602 | } |
603 | ||
e4f93234 CL |
604 | /* |
605 | * fattr3 | |
606 | * | |
607 | * struct fattr3 { | |
608 | * ftype3 type; | |
609 | * mode3 mode; | |
610 | * uint32 nlink; | |
611 | * uid3 uid; | |
612 | * gid3 gid; | |
613 | * size3 size; | |
614 | * size3 used; | |
615 | * specdata3 rdev; | |
616 | * uint64 fsid; | |
617 | * fileid3 fileid; | |
618 | * nfstime3 atime; | |
619 | * nfstime3 mtime; | |
620 | * nfstime3 ctime; | |
621 | * }; | |
622 | */ | |
264d948c TM |
623 | static int decode_fattr3(struct xdr_stream *xdr, struct nfs_fattr *fattr, |
624 | struct user_namespace *userns) | |
e4f93234 | 625 | { |
f6048709 | 626 | umode_t fmode; |
e4f93234 CL |
627 | __be32 *p; |
628 | ||
629 | p = xdr_inline_decode(xdr, NFS3_fattr_sz << 2); | |
eb72f484 CL |
630 | if (unlikely(!p)) |
631 | return -EIO; | |
f6048709 CL |
632 | |
633 | p = xdr_decode_ftype3(p, &fmode); | |
634 | ||
635 | fattr->mode = (be32_to_cpup(p++) & ~S_IFMT) | fmode; | |
636 | fattr->nlink = be32_to_cpup(p++); | |
264d948c | 637 | fattr->uid = make_kuid(userns, be32_to_cpup(p++)); |
57a38dae EB |
638 | if (!uid_valid(fattr->uid)) |
639 | goto out_uid; | |
264d948c | 640 | fattr->gid = make_kgid(userns, be32_to_cpup(p++)); |
57a38dae EB |
641 | if (!gid_valid(fattr->gid)) |
642 | goto out_gid; | |
f6048709 CL |
643 | |
644 | p = xdr_decode_size3(p, &fattr->size); | |
645 | p = xdr_decode_size3(p, &fattr->du.nfs3.used); | |
646 | p = xdr_decode_specdata3(p, &fattr->rdev); | |
647 | ||
648 | p = xdr_decode_hyper(p, &fattr->fsid.major); | |
649 | fattr->fsid.minor = 0; | |
650 | ||
651 | p = xdr_decode_fileid3(p, &fattr->fileid); | |
652 | p = xdr_decode_nfstime3(p, &fattr->atime); | |
653 | p = xdr_decode_nfstime3(p, &fattr->mtime); | |
654 | xdr_decode_nfstime3(p, &fattr->ctime); | |
3a1556e8 | 655 | fattr->change_attr = nfs_timespec_to_change_attr(&fattr->ctime); |
f6048709 CL |
656 | |
657 | fattr->valid |= NFS_ATTR_FATTR_V3; | |
e4f93234 | 658 | return 0; |
57a38dae EB |
659 | out_uid: |
660 | dprintk("NFS: returned invalid uid\n"); | |
661 | return -EINVAL; | |
662 | out_gid: | |
663 | dprintk("NFS: returned invalid gid\n"); | |
664 | return -EINVAL; | |
e4f93234 CL |
665 | } |
666 | ||
667 | /* | |
668 | * post_op_attr | |
669 | * | |
670 | * union post_op_attr switch (bool attributes_follow) { | |
671 | * case TRUE: | |
672 | * fattr3 attributes; | |
673 | * case FALSE: | |
674 | * void; | |
675 | * }; | |
676 | */ | |
264d948c TM |
677 | static int decode_post_op_attr(struct xdr_stream *xdr, struct nfs_fattr *fattr, |
678 | struct user_namespace *userns) | |
e4f93234 CL |
679 | { |
680 | __be32 *p; | |
681 | ||
682 | p = xdr_inline_decode(xdr, 4); | |
eb72f484 CL |
683 | if (unlikely(!p)) |
684 | return -EIO; | |
e4f93234 | 685 | if (*p != xdr_zero) |
264d948c | 686 | return decode_fattr3(xdr, fattr, userns); |
e4f93234 | 687 | return 0; |
e4f93234 CL |
688 | } |
689 | ||
690 | /* | |
691 | * wcc_attr | |
692 | * struct wcc_attr { | |
693 | * size3 size; | |
694 | * nfstime3 mtime; | |
695 | * nfstime3 ctime; | |
696 | * }; | |
697 | */ | |
698 | static int decode_wcc_attr(struct xdr_stream *xdr, struct nfs_fattr *fattr) | |
699 | { | |
700 | __be32 *p; | |
701 | ||
702 | p = xdr_inline_decode(xdr, NFS3_wcc_attr_sz << 2); | |
eb72f484 CL |
703 | if (unlikely(!p)) |
704 | return -EIO; | |
f6048709 CL |
705 | |
706 | fattr->valid |= NFS_ATTR_FATTR_PRESIZE | |
3a1556e8 | 707 | | NFS_ATTR_FATTR_PRECHANGE |
f6048709 CL |
708 | | NFS_ATTR_FATTR_PREMTIME |
709 | | NFS_ATTR_FATTR_PRECTIME; | |
710 | ||
711 | p = xdr_decode_size3(p, &fattr->pre_size); | |
712 | p = xdr_decode_nfstime3(p, &fattr->pre_mtime); | |
713 | xdr_decode_nfstime3(p, &fattr->pre_ctime); | |
3a1556e8 | 714 | fattr->pre_change_attr = nfs_timespec_to_change_attr(&fattr->pre_ctime); |
f6048709 | 715 | |
e4f93234 | 716 | return 0; |
e4f93234 CL |
717 | } |
718 | ||
719 | /* | |
720 | * pre_op_attr | |
721 | * union pre_op_attr switch (bool attributes_follow) { | |
722 | * case TRUE: | |
723 | * wcc_attr attributes; | |
724 | * case FALSE: | |
725 | * void; | |
726 | * }; | |
727 | * | |
728 | * wcc_data | |
729 | * | |
730 | * struct wcc_data { | |
731 | * pre_op_attr before; | |
732 | * post_op_attr after; | |
733 | * }; | |
734 | */ | |
735 | static int decode_pre_op_attr(struct xdr_stream *xdr, struct nfs_fattr *fattr) | |
736 | { | |
737 | __be32 *p; | |
738 | ||
739 | p = xdr_inline_decode(xdr, 4); | |
eb72f484 CL |
740 | if (unlikely(!p)) |
741 | return -EIO; | |
e4f93234 CL |
742 | if (*p != xdr_zero) |
743 | return decode_wcc_attr(xdr, fattr); | |
744 | return 0; | |
e4f93234 CL |
745 | } |
746 | ||
264d948c TM |
747 | static int decode_wcc_data(struct xdr_stream *xdr, struct nfs_fattr *fattr, |
748 | struct user_namespace *userns) | |
e4f93234 CL |
749 | { |
750 | int error; | |
751 | ||
752 | error = decode_pre_op_attr(xdr, fattr); | |
753 | if (unlikely(error)) | |
754 | goto out; | |
264d948c | 755 | error = decode_post_op_attr(xdr, fattr, userns); |
e4f93234 CL |
756 | out: |
757 | return error; | |
758 | } | |
759 | ||
760 | /* | |
761 | * post_op_fh3 | |
762 | * | |
763 | * union post_op_fh3 switch (bool handle_follows) { | |
764 | * case TRUE: | |
765 | * nfs_fh3 handle; | |
766 | * case FALSE: | |
767 | * void; | |
768 | * }; | |
769 | */ | |
770 | static int decode_post_op_fh3(struct xdr_stream *xdr, struct nfs_fh *fh) | |
771 | { | |
772 | __be32 *p = xdr_inline_decode(xdr, 4); | |
eb72f484 CL |
773 | if (unlikely(!p)) |
774 | return -EIO; | |
e4f93234 CL |
775 | if (*p != xdr_zero) |
776 | return decode_nfs_fh3(xdr, fh); | |
777 | zero_nfs_fh3(fh); | |
778 | return 0; | |
e4f93234 CL |
779 | } |
780 | ||
d9c407b1 CL |
781 | /* |
782 | * diropargs3 | |
783 | * | |
784 | * struct diropargs3 { | |
785 | * nfs_fh3 dir; | |
786 | * filename3 name; | |
787 | * }; | |
788 | */ | |
789 | static void encode_diropargs3(struct xdr_stream *xdr, const struct nfs_fh *fh, | |
790 | const char *name, u32 length) | |
791 | { | |
792 | encode_nfs_fh3(xdr, fh); | |
793 | encode_filename3(xdr, name, length); | |
794 | } | |
795 | ||
796 | ||
1da177e4 | 797 | /* |
499ff710 CL |
798 | * NFSv3 XDR encode functions |
799 | * | |
800 | * NFSv3 argument types are defined in section 3.3 of RFC 1813: | |
801 | * "NFS Version 3 Protocol Specification". | |
1da177e4 LT |
802 | */ |
803 | ||
d9c407b1 CL |
804 | /* |
805 | * 3.3.1 GETATTR3args | |
806 | * | |
807 | * struct GETATTR3args { | |
808 | * nfs_fh3 object; | |
809 | * }; | |
810 | */ | |
9f06c719 CL |
811 | static void nfs3_xdr_enc_getattr3args(struct rpc_rqst *req, |
812 | struct xdr_stream *xdr, | |
fcc85819 | 813 | const void *data) |
d9c407b1 | 814 | { |
fcc85819 CH |
815 | const struct nfs_fh *fh = data; |
816 | ||
9f06c719 | 817 | encode_nfs_fh3(xdr, fh); |
d9c407b1 CL |
818 | } |
819 | ||
d9c407b1 CL |
820 | /* |
821 | * 3.3.2 SETATTR3args | |
822 | * | |
823 | * union sattrguard3 switch (bool check) { | |
824 | * case TRUE: | |
825 | * nfstime3 obj_ctime; | |
826 | * case FALSE: | |
827 | * void; | |
828 | * }; | |
829 | * | |
830 | * struct SETATTR3args { | |
831 | * nfs_fh3 object; | |
832 | * sattr3 new_attributes; | |
833 | * sattrguard3 guard; | |
834 | * }; | |
835 | */ | |
836 | static void encode_sattrguard3(struct xdr_stream *xdr, | |
837 | const struct nfs3_sattrargs *args) | |
838 | { | |
839 | __be32 *p; | |
840 | ||
841 | if (args->guard) { | |
842 | p = xdr_reserve_space(xdr, 4 + 8); | |
843 | *p++ = xdr_one; | |
9d5a6434 | 844 | xdr_encode_nfstime3(p, &args->guardtime); |
d9c407b1 CL |
845 | } else { |
846 | p = xdr_reserve_space(xdr, 4); | |
847 | *p = xdr_zero; | |
848 | } | |
849 | } | |
850 | ||
9f06c719 CL |
851 | static void nfs3_xdr_enc_setattr3args(struct rpc_rqst *req, |
852 | struct xdr_stream *xdr, | |
fcc85819 | 853 | const void *data) |
d9c407b1 | 854 | { |
fcc85819 | 855 | const struct nfs3_sattrargs *args = data; |
9f06c719 | 856 | encode_nfs_fh3(xdr, args->fh); |
264d948c | 857 | encode_sattr3(xdr, args->sattr, rpc_rqst_userns(req)); |
9f06c719 | 858 | encode_sattrguard3(xdr, args); |
d9c407b1 CL |
859 | } |
860 | ||
d9c407b1 CL |
861 | /* |
862 | * 3.3.3 LOOKUP3args | |
863 | * | |
864 | * struct LOOKUP3args { | |
865 | * diropargs3 what; | |
866 | * }; | |
867 | */ | |
9f06c719 CL |
868 | static void nfs3_xdr_enc_lookup3args(struct rpc_rqst *req, |
869 | struct xdr_stream *xdr, | |
fcc85819 | 870 | const void *data) |
d9c407b1 | 871 | { |
fcc85819 CH |
872 | const struct nfs3_diropargs *args = data; |
873 | ||
9f06c719 | 874 | encode_diropargs3(xdr, args->fh, args->name, args->len); |
d9c407b1 CL |
875 | } |
876 | ||
d9c407b1 CL |
877 | /* |
878 | * 3.3.4 ACCESS3args | |
879 | * | |
880 | * struct ACCESS3args { | |
881 | * nfs_fh3 object; | |
882 | * uint32 access; | |
883 | * }; | |
884 | */ | |
885 | static void encode_access3args(struct xdr_stream *xdr, | |
886 | const struct nfs3_accessargs *args) | |
887 | { | |
888 | encode_nfs_fh3(xdr, args->fh); | |
889 | encode_uint32(xdr, args->access); | |
890 | } | |
891 | ||
9f06c719 CL |
892 | static void nfs3_xdr_enc_access3args(struct rpc_rqst *req, |
893 | struct xdr_stream *xdr, | |
fcc85819 | 894 | const void *data) |
d9c407b1 | 895 | { |
fcc85819 CH |
896 | const struct nfs3_accessargs *args = data; |
897 | ||
9f06c719 | 898 | encode_access3args(xdr, args); |
d9c407b1 CL |
899 | } |
900 | ||
901 | /* | |
902 | * 3.3.5 READLINK3args | |
903 | * | |
904 | * struct READLINK3args { | |
905 | * nfs_fh3 symlink; | |
906 | * }; | |
907 | */ | |
9f06c719 CL |
908 | static void nfs3_xdr_enc_readlink3args(struct rpc_rqst *req, |
909 | struct xdr_stream *xdr, | |
fcc85819 | 910 | const void *data) |
d9c407b1 | 911 | { |
fcc85819 CH |
912 | const struct nfs3_readlinkargs *args = data; |
913 | ||
9f06c719 | 914 | encode_nfs_fh3(xdr, args->fh); |
9ed5af26 TM |
915 | rpc_prepare_reply_pages(req, args->pages, args->pgbase, args->pglen, |
916 | NFS3_readlinkres_sz - NFS3_pagepad_sz); | |
d9c407b1 CL |
917 | } |
918 | ||
d9c407b1 CL |
919 | /* |
920 | * 3.3.6 READ3args | |
921 | * | |
922 | * struct READ3args { | |
923 | * nfs_fh3 file; | |
924 | * offset3 offset; | |
925 | * count3 count; | |
926 | * }; | |
927 | */ | |
928 | static void encode_read3args(struct xdr_stream *xdr, | |
3c6b899c | 929 | const struct nfs_pgio_args *args) |
d9c407b1 CL |
930 | { |
931 | __be32 *p; | |
932 | ||
933 | encode_nfs_fh3(xdr, args->fh); | |
934 | ||
935 | p = xdr_reserve_space(xdr, 8 + 4); | |
936 | p = xdr_encode_hyper(p, args->offset); | |
937 | *p = cpu_to_be32(args->count); | |
938 | } | |
939 | ||
9f06c719 CL |
940 | static void nfs3_xdr_enc_read3args(struct rpc_rqst *req, |
941 | struct xdr_stream *xdr, | |
fcc85819 | 942 | const void *data) |
d9c407b1 | 943 | { |
fcc85819 | 944 | const struct nfs_pgio_args *args = data; |
9ed5af26 TM |
945 | unsigned int replen = args->replen ? args->replen : |
946 | NFS3_readres_sz - NFS3_pagepad_sz; | |
fcc85819 | 947 | |
9f06c719 | 948 | encode_read3args(xdr, args); |
cf500bac CL |
949 | rpc_prepare_reply_pages(req, args->pages, args->pgbase, |
950 | args->count, replen); | |
d9c407b1 | 951 | req->rq_rcv_buf.flags |= XDRBUF_READ; |
d9c407b1 CL |
952 | } |
953 | ||
d9c407b1 CL |
954 | /* |
955 | * 3.3.7 WRITE3args | |
956 | * | |
957 | * enum stable_how { | |
958 | * UNSTABLE = 0, | |
959 | * DATA_SYNC = 1, | |
960 | * FILE_SYNC = 2 | |
961 | * }; | |
962 | * | |
963 | * struct WRITE3args { | |
964 | * nfs_fh3 file; | |
965 | * offset3 offset; | |
966 | * count3 count; | |
967 | * stable_how stable; | |
968 | * opaque data<>; | |
969 | * }; | |
970 | */ | |
971 | static void encode_write3args(struct xdr_stream *xdr, | |
3c6b899c | 972 | const struct nfs_pgio_args *args) |
d9c407b1 CL |
973 | { |
974 | __be32 *p; | |
975 | ||
976 | encode_nfs_fh3(xdr, args->fh); | |
977 | ||
978 | p = xdr_reserve_space(xdr, 8 + 4 + 4 + 4); | |
979 | p = xdr_encode_hyper(p, args->offset); | |
980 | *p++ = cpu_to_be32(args->count); | |
d9c407b1 | 981 | *p++ = cpu_to_be32(args->stable); |
d9c407b1 CL |
982 | *p = cpu_to_be32(args->count); |
983 | xdr_write_pages(xdr, args->pages, args->pgbase, args->count); | |
984 | } | |
985 | ||
9f06c719 CL |
986 | static void nfs3_xdr_enc_write3args(struct rpc_rqst *req, |
987 | struct xdr_stream *xdr, | |
fcc85819 | 988 | const void *data) |
d9c407b1 | 989 | { |
fcc85819 CH |
990 | const struct nfs_pgio_args *args = data; |
991 | ||
9f06c719 CL |
992 | encode_write3args(xdr, args); |
993 | xdr->buf->flags |= XDRBUF_WRITE; | |
d9c407b1 CL |
994 | } |
995 | ||
d9c407b1 CL |
996 | /* |
997 | * 3.3.8 CREATE3args | |
998 | * | |
999 | * enum createmode3 { | |
1000 | * UNCHECKED = 0, | |
1001 | * GUARDED = 1, | |
1002 | * EXCLUSIVE = 2 | |
1003 | * }; | |
1004 | * | |
1005 | * union createhow3 switch (createmode3 mode) { | |
1006 | * case UNCHECKED: | |
1007 | * case GUARDED: | |
1008 | * sattr3 obj_attributes; | |
1009 | * case EXCLUSIVE: | |
1010 | * createverf3 verf; | |
1011 | * }; | |
1012 | * | |
1013 | * struct CREATE3args { | |
1014 | * diropargs3 where; | |
1015 | * createhow3 how; | |
1016 | * }; | |
1017 | */ | |
1018 | static void encode_createhow3(struct xdr_stream *xdr, | |
264d948c TM |
1019 | const struct nfs3_createargs *args, |
1020 | struct user_namespace *userns) | |
d9c407b1 CL |
1021 | { |
1022 | encode_uint32(xdr, args->createmode); | |
1023 | switch (args->createmode) { | |
1024 | case NFS3_CREATE_UNCHECKED: | |
1025 | case NFS3_CREATE_GUARDED: | |
264d948c | 1026 | encode_sattr3(xdr, args->sattr, userns); |
d9c407b1 CL |
1027 | break; |
1028 | case NFS3_CREATE_EXCLUSIVE: | |
1029 | encode_createverf3(xdr, args->verifier); | |
1030 | break; | |
1031 | default: | |
1032 | BUG(); | |
1033 | } | |
1034 | } | |
1035 | ||
9f06c719 CL |
1036 | static void nfs3_xdr_enc_create3args(struct rpc_rqst *req, |
1037 | struct xdr_stream *xdr, | |
fcc85819 | 1038 | const void *data) |
d9c407b1 | 1039 | { |
fcc85819 CH |
1040 | const struct nfs3_createargs *args = data; |
1041 | ||
9f06c719 | 1042 | encode_diropargs3(xdr, args->fh, args->name, args->len); |
264d948c | 1043 | encode_createhow3(xdr, args, rpc_rqst_userns(req)); |
d9c407b1 CL |
1044 | } |
1045 | ||
d9c407b1 CL |
1046 | /* |
1047 | * 3.3.9 MKDIR3args | |
1048 | * | |
1049 | * struct MKDIR3args { | |
1050 | * diropargs3 where; | |
1051 | * sattr3 attributes; | |
1052 | * }; | |
1053 | */ | |
9f06c719 CL |
1054 | static void nfs3_xdr_enc_mkdir3args(struct rpc_rqst *req, |
1055 | struct xdr_stream *xdr, | |
fcc85819 | 1056 | const void *data) |
d9c407b1 | 1057 | { |
fcc85819 CH |
1058 | const struct nfs3_mkdirargs *args = data; |
1059 | ||
9f06c719 | 1060 | encode_diropargs3(xdr, args->fh, args->name, args->len); |
264d948c | 1061 | encode_sattr3(xdr, args->sattr, rpc_rqst_userns(req)); |
d9c407b1 CL |
1062 | } |
1063 | ||
d9c407b1 CL |
1064 | /* |
1065 | * 3.3.10 SYMLINK3args | |
1066 | * | |
1067 | * struct symlinkdata3 { | |
1068 | * sattr3 symlink_attributes; | |
1069 | * nfspath3 symlink_data; | |
1070 | * }; | |
1071 | * | |
1072 | * struct SYMLINK3args { | |
1073 | * diropargs3 where; | |
1074 | * symlinkdata3 symlink; | |
1075 | * }; | |
1076 | */ | |
1077 | static void encode_symlinkdata3(struct xdr_stream *xdr, | |
264d948c TM |
1078 | const void *data, |
1079 | struct user_namespace *userns) | |
d9c407b1 | 1080 | { |
fcc85819 CH |
1081 | const struct nfs3_symlinkargs *args = data; |
1082 | ||
264d948c | 1083 | encode_sattr3(xdr, args->sattr, userns); |
d9c407b1 CL |
1084 | encode_nfspath3(xdr, args->pages, args->pathlen); |
1085 | } | |
1086 | ||
9f06c719 CL |
1087 | static void nfs3_xdr_enc_symlink3args(struct rpc_rqst *req, |
1088 | struct xdr_stream *xdr, | |
fcc85819 | 1089 | const void *data) |
d9c407b1 | 1090 | { |
fcc85819 CH |
1091 | const struct nfs3_symlinkargs *args = data; |
1092 | ||
9f06c719 | 1093 | encode_diropargs3(xdr, args->fromfh, args->fromname, args->fromlen); |
264d948c | 1094 | encode_symlinkdata3(xdr, args, rpc_rqst_userns(req)); |
2fcc213a | 1095 | xdr->buf->flags |= XDRBUF_WRITE; |
d9c407b1 CL |
1096 | } |
1097 | ||
d9c407b1 CL |
1098 | /* |
1099 | * 3.3.11 MKNOD3args | |
1100 | * | |
1101 | * struct devicedata3 { | |
1102 | * sattr3 dev_attributes; | |
1103 | * specdata3 spec; | |
1104 | * }; | |
1105 | * | |
1106 | * union mknoddata3 switch (ftype3 type) { | |
1107 | * case NF3CHR: | |
1108 | * case NF3BLK: | |
1109 | * devicedata3 device; | |
1110 | * case NF3SOCK: | |
1111 | * case NF3FIFO: | |
1112 | * sattr3 pipe_attributes; | |
1113 | * default: | |
1114 | * void; | |
1115 | * }; | |
1116 | * | |
1117 | * struct MKNOD3args { | |
1118 | * diropargs3 where; | |
1119 | * mknoddata3 what; | |
1120 | * }; | |
1121 | */ | |
1122 | static void encode_devicedata3(struct xdr_stream *xdr, | |
264d948c TM |
1123 | const struct nfs3_mknodargs *args, |
1124 | struct user_namespace *userns) | |
d9c407b1 | 1125 | { |
264d948c | 1126 | encode_sattr3(xdr, args->sattr, userns); |
d9c407b1 CL |
1127 | encode_specdata3(xdr, args->rdev); |
1128 | } | |
1129 | ||
1130 | static void encode_mknoddata3(struct xdr_stream *xdr, | |
264d948c TM |
1131 | const struct nfs3_mknodargs *args, |
1132 | struct user_namespace *userns) | |
d9c407b1 CL |
1133 | { |
1134 | encode_ftype3(xdr, args->type); | |
1135 | switch (args->type) { | |
1136 | case NF3CHR: | |
1137 | case NF3BLK: | |
264d948c | 1138 | encode_devicedata3(xdr, args, userns); |
d9c407b1 CL |
1139 | break; |
1140 | case NF3SOCK: | |
1141 | case NF3FIFO: | |
264d948c | 1142 | encode_sattr3(xdr, args->sattr, userns); |
d9c407b1 CL |
1143 | break; |
1144 | case NF3REG: | |
1145 | case NF3DIR: | |
1146 | break; | |
1147 | default: | |
1148 | BUG(); | |
1149 | } | |
1150 | } | |
1151 | ||
9f06c719 CL |
1152 | static void nfs3_xdr_enc_mknod3args(struct rpc_rqst *req, |
1153 | struct xdr_stream *xdr, | |
fcc85819 | 1154 | const void *data) |
d9c407b1 | 1155 | { |
fcc85819 CH |
1156 | const struct nfs3_mknodargs *args = data; |
1157 | ||
9f06c719 | 1158 | encode_diropargs3(xdr, args->fh, args->name, args->len); |
264d948c | 1159 | encode_mknoddata3(xdr, args, rpc_rqst_userns(req)); |
d9c407b1 CL |
1160 | } |
1161 | ||
1162 | /* | |
1163 | * 3.3.12 REMOVE3args | |
1164 | * | |
1165 | * struct REMOVE3args { | |
1166 | * diropargs3 object; | |
1167 | * }; | |
1168 | */ | |
9f06c719 CL |
1169 | static void nfs3_xdr_enc_remove3args(struct rpc_rqst *req, |
1170 | struct xdr_stream *xdr, | |
fcc85819 | 1171 | const void *data) |
d9c407b1 | 1172 | { |
fcc85819 CH |
1173 | const struct nfs_removeargs *args = data; |
1174 | ||
9f06c719 | 1175 | encode_diropargs3(xdr, args->fh, args->name.name, args->name.len); |
d9c407b1 CL |
1176 | } |
1177 | ||
d9c407b1 CL |
1178 | /* |
1179 | * 3.3.14 RENAME3args | |
1180 | * | |
1181 | * struct RENAME3args { | |
1182 | * diropargs3 from; | |
1183 | * diropargs3 to; | |
1184 | * }; | |
1185 | */ | |
9f06c719 CL |
1186 | static void nfs3_xdr_enc_rename3args(struct rpc_rqst *req, |
1187 | struct xdr_stream *xdr, | |
fcc85819 | 1188 | const void *data) |
d9c407b1 | 1189 | { |
fcc85819 | 1190 | const struct nfs_renameargs *args = data; |
d9c407b1 CL |
1191 | const struct qstr *old = args->old_name; |
1192 | const struct qstr *new = args->new_name; | |
d9c407b1 | 1193 | |
9f06c719 CL |
1194 | encode_diropargs3(xdr, args->old_dir, old->name, old->len); |
1195 | encode_diropargs3(xdr, args->new_dir, new->name, new->len); | |
d9c407b1 CL |
1196 | } |
1197 | ||
d9c407b1 CL |
1198 | /* |
1199 | * 3.3.15 LINK3args | |
1200 | * | |
1201 | * struct LINK3args { | |
1202 | * nfs_fh3 file; | |
1203 | * diropargs3 link; | |
1204 | * }; | |
1205 | */ | |
9f06c719 CL |
1206 | static void nfs3_xdr_enc_link3args(struct rpc_rqst *req, |
1207 | struct xdr_stream *xdr, | |
fcc85819 | 1208 | const void *data) |
d9c407b1 | 1209 | { |
fcc85819 CH |
1210 | const struct nfs3_linkargs *args = data; |
1211 | ||
9f06c719 CL |
1212 | encode_nfs_fh3(xdr, args->fromfh); |
1213 | encode_diropargs3(xdr, args->tofh, args->toname, args->tolen); | |
d9c407b1 CL |
1214 | } |
1215 | ||
d9c407b1 CL |
1216 | /* |
1217 | * 3.3.16 READDIR3args | |
1218 | * | |
1219 | * struct READDIR3args { | |
1220 | * nfs_fh3 dir; | |
1221 | * cookie3 cookie; | |
1222 | * cookieverf3 cookieverf; | |
1223 | * count3 count; | |
1224 | * }; | |
1225 | */ | |
1226 | static void encode_readdir3args(struct xdr_stream *xdr, | |
1227 | const struct nfs3_readdirargs *args) | |
1228 | { | |
1229 | __be32 *p; | |
1230 | ||
1231 | encode_nfs_fh3(xdr, args->fh); | |
1232 | ||
1233 | p = xdr_reserve_space(xdr, 8 + NFS3_COOKIEVERFSIZE + 4); | |
1234 | p = xdr_encode_cookie3(p, args->cookie); | |
1235 | p = xdr_encode_cookieverf3(p, args->verf); | |
1236 | *p = cpu_to_be32(args->count); | |
1237 | } | |
1238 | ||
9f06c719 CL |
1239 | static void nfs3_xdr_enc_readdir3args(struct rpc_rqst *req, |
1240 | struct xdr_stream *xdr, | |
fcc85819 | 1241 | const void *data) |
d9c407b1 | 1242 | { |
fcc85819 CH |
1243 | const struct nfs3_readdirargs *args = data; |
1244 | ||
9f06c719 | 1245 | encode_readdir3args(xdr, args); |
9ed5af26 TM |
1246 | rpc_prepare_reply_pages(req, args->pages, 0, args->count, |
1247 | NFS3_readdirres_sz - NFS3_pagepad_sz); | |
d9c407b1 CL |
1248 | } |
1249 | ||
1250 | /* | |
1251 | * 3.3.17 READDIRPLUS3args | |
1252 | * | |
1253 | * struct READDIRPLUS3args { | |
1254 | * nfs_fh3 dir; | |
1255 | * cookie3 cookie; | |
1256 | * cookieverf3 cookieverf; | |
1257 | * count3 dircount; | |
1258 | * count3 maxcount; | |
1259 | * }; | |
1260 | */ | |
1261 | static void encode_readdirplus3args(struct xdr_stream *xdr, | |
1262 | const struct nfs3_readdirargs *args) | |
1263 | { | |
1264 | __be32 *p; | |
1265 | ||
1266 | encode_nfs_fh3(xdr, args->fh); | |
1267 | ||
1268 | p = xdr_reserve_space(xdr, 8 + NFS3_COOKIEVERFSIZE + 4 + 4); | |
1269 | p = xdr_encode_cookie3(p, args->cookie); | |
1270 | p = xdr_encode_cookieverf3(p, args->verf); | |
1271 | ||
1272 | /* | |
1273 | * readdirplus: need dircount + buffer size. | |
1274 | * We just make sure we make dircount big enough | |
1275 | */ | |
1276 | *p++ = cpu_to_be32(args->count >> 3); | |
1277 | ||
1278 | *p = cpu_to_be32(args->count); | |
1279 | } | |
1280 | ||
9f06c719 CL |
1281 | static void nfs3_xdr_enc_readdirplus3args(struct rpc_rqst *req, |
1282 | struct xdr_stream *xdr, | |
fcc85819 | 1283 | const void *data) |
d9c407b1 | 1284 | { |
fcc85819 CH |
1285 | const struct nfs3_readdirargs *args = data; |
1286 | ||
9f06c719 | 1287 | encode_readdirplus3args(xdr, args); |
9ed5af26 TM |
1288 | rpc_prepare_reply_pages(req, args->pages, 0, args->count, |
1289 | NFS3_readdirres_sz - NFS3_pagepad_sz); | |
d9c407b1 CL |
1290 | } |
1291 | ||
d9c407b1 CL |
1292 | /* |
1293 | * 3.3.21 COMMIT3args | |
1294 | * | |
1295 | * struct COMMIT3args { | |
1296 | * nfs_fh3 file; | |
1297 | * offset3 offset; | |
1298 | * count3 count; | |
1299 | * }; | |
1300 | */ | |
1301 | static void encode_commit3args(struct xdr_stream *xdr, | |
0b7c0153 | 1302 | const struct nfs_commitargs *args) |
d9c407b1 CL |
1303 | { |
1304 | __be32 *p; | |
1305 | ||
1306 | encode_nfs_fh3(xdr, args->fh); | |
1307 | ||
1308 | p = xdr_reserve_space(xdr, 8 + 4); | |
1309 | p = xdr_encode_hyper(p, args->offset); | |
1310 | *p = cpu_to_be32(args->count); | |
1311 | } | |
1312 | ||
9f06c719 CL |
1313 | static void nfs3_xdr_enc_commit3args(struct rpc_rqst *req, |
1314 | struct xdr_stream *xdr, | |
fcc85819 | 1315 | const void *data) |
d9c407b1 | 1316 | { |
fcc85819 CH |
1317 | const struct nfs_commitargs *args = data; |
1318 | ||
9f06c719 | 1319 | encode_commit3args(xdr, args); |
d9c407b1 CL |
1320 | } |
1321 | ||
b7fa0554 | 1322 | #ifdef CONFIG_NFS_V3_ACL |
b7fa0554 | 1323 | |
9f06c719 CL |
1324 | static void nfs3_xdr_enc_getacl3args(struct rpc_rqst *req, |
1325 | struct xdr_stream *xdr, | |
fcc85819 | 1326 | const void *data) |
d9c407b1 | 1327 | { |
fcc85819 CH |
1328 | const struct nfs3_getaclargs *args = data; |
1329 | ||
9f06c719 CL |
1330 | encode_nfs_fh3(xdr, args->fh); |
1331 | encode_uint32(xdr, args->mask); | |
431f6eb3 | 1332 | if (args->mask & (NFS_ACL | NFS_DFACL)) { |
cf500bac | 1333 | rpc_prepare_reply_pages(req, args->pages, 0, |
d9c407b1 | 1334 | NFSACL_MAXPAGES << PAGE_SHIFT, |
9ed5af26 | 1335 | ACL3_getaclres_sz - NFS3_pagepad_sz); |
431f6eb3 TM |
1336 | req->rq_rcv_buf.flags |= XDRBUF_SPARSE_PAGES; |
1337 | } | |
d9c407b1 CL |
1338 | } |
1339 | ||
9f06c719 CL |
1340 | static void nfs3_xdr_enc_setacl3args(struct rpc_rqst *req, |
1341 | struct xdr_stream *xdr, | |
fcc85819 | 1342 | const void *data) |
d9c407b1 | 1343 | { |
fcc85819 | 1344 | const struct nfs3_setaclargs *args = data; |
d9c407b1 CL |
1345 | unsigned int base; |
1346 | int error; | |
1347 | ||
9f06c719 CL |
1348 | encode_nfs_fh3(xdr, NFS_FH(args->inode)); |
1349 | encode_uint32(xdr, args->mask); | |
ee5dc773 CL |
1350 | |
1351 | base = req->rq_slen; | |
d9c407b1 | 1352 | if (args->npages != 0) |
9f06c719 | 1353 | xdr_write_pages(xdr, args->pages, 0, args->len); |
ee5dc773 | 1354 | else |
d683cc49 | 1355 | xdr_reserve_space(xdr, args->len); |
d9c407b1 | 1356 | |
9f06c719 | 1357 | error = nfsacl_encode(xdr->buf, base, args->inode, |
d9c407b1 CL |
1358 | (args->mask & NFS_ACL) ? |
1359 | args->acl_access : NULL, 1, 0); | |
7fc38846 | 1360 | /* FIXME: this is just broken */ |
d9c407b1 | 1361 | BUG_ON(error < 0); |
9f06c719 | 1362 | error = nfsacl_encode(xdr->buf, base + error, args->inode, |
d9c407b1 CL |
1363 | (args->mask & NFS_DFACL) ? |
1364 | args->acl_default : NULL, 1, | |
1365 | NFS_ACL_DEFAULT); | |
1366 | BUG_ON(error < 0); | |
d9c407b1 CL |
1367 | } |
1368 | ||
b7fa0554 AG |
1369 | #endif /* CONFIG_NFS_V3_ACL */ |
1370 | ||
1da177e4 | 1371 | /* |
b2cdd9c9 CL |
1372 | * NFSv3 XDR decode functions |
1373 | * | |
1374 | * NFSv3 result types are defined in section 3.3 of RFC 1813: | |
1375 | * "NFS Version 3 Protocol Specification". | |
1da177e4 | 1376 | */ |
1da177e4 LT |
1377 | |
1378 | /* | |
e4f93234 CL |
1379 | * 3.3.1 GETATTR3res |
1380 | * | |
1381 | * struct GETATTR3resok { | |
1382 | * fattr3 obj_attributes; | |
1383 | * }; | |
1384 | * | |
1385 | * union GETATTR3res switch (nfsstat3 status) { | |
1386 | * case NFS3_OK: | |
1387 | * GETATTR3resok resok; | |
1388 | * default: | |
1389 | * void; | |
1390 | * }; | |
1da177e4 | 1391 | */ |
bf269551 CL |
1392 | static int nfs3_xdr_dec_getattr3res(struct rpc_rqst *req, |
1393 | struct xdr_stream *xdr, | |
fc016483 | 1394 | void *result) |
1da177e4 | 1395 | { |
e4f93234 CL |
1396 | enum nfs_stat status; |
1397 | int error; | |
1398 | ||
bf269551 | 1399 | error = decode_nfsstat3(xdr, &status); |
e4f93234 CL |
1400 | if (unlikely(error)) |
1401 | goto out; | |
1402 | if (status != NFS3_OK) | |
1403 | goto out_default; | |
264d948c | 1404 | error = decode_fattr3(xdr, result, rpc_rqst_userns(req)); |
e4f93234 CL |
1405 | out: |
1406 | return error; | |
1407 | out_default: | |
5e7e5a0d | 1408 | return nfs3_stat_to_errno(status); |
e4f93234 CL |
1409 | } |
1410 | ||
e4f93234 CL |
1411 | /* |
1412 | * 3.3.2 SETATTR3res | |
1413 | * | |
1414 | * struct SETATTR3resok { | |
1415 | * wcc_data obj_wcc; | |
1416 | * }; | |
1417 | * | |
1418 | * struct SETATTR3resfail { | |
1419 | * wcc_data obj_wcc; | |
1420 | * }; | |
1421 | * | |
1422 | * union SETATTR3res switch (nfsstat3 status) { | |
1423 | * case NFS3_OK: | |
1424 | * SETATTR3resok resok; | |
1425 | * default: | |
1426 | * SETATTR3resfail resfail; | |
1427 | * }; | |
1428 | */ | |
bf269551 CL |
1429 | static int nfs3_xdr_dec_setattr3res(struct rpc_rqst *req, |
1430 | struct xdr_stream *xdr, | |
fc016483 | 1431 | void *result) |
e4f93234 | 1432 | { |
e4f93234 CL |
1433 | enum nfs_stat status; |
1434 | int error; | |
1435 | ||
bf269551 | 1436 | error = decode_nfsstat3(xdr, &status); |
e4f93234 CL |
1437 | if (unlikely(error)) |
1438 | goto out; | |
264d948c | 1439 | error = decode_wcc_data(xdr, result, rpc_rqst_userns(req)); |
e4f93234 CL |
1440 | if (unlikely(error)) |
1441 | goto out; | |
1442 | if (status != NFS3_OK) | |
1443 | goto out_status; | |
1444 | out: | |
1445 | return error; | |
1446 | out_status: | |
5e7e5a0d | 1447 | return nfs3_stat_to_errno(status); |
e4f93234 CL |
1448 | } |
1449 | ||
e4f93234 CL |
1450 | /* |
1451 | * 3.3.3 LOOKUP3res | |
1452 | * | |
1453 | * struct LOOKUP3resok { | |
1454 | * nfs_fh3 object; | |
1455 | * post_op_attr obj_attributes; | |
1456 | * post_op_attr dir_attributes; | |
1457 | * }; | |
1458 | * | |
1459 | * struct LOOKUP3resfail { | |
1460 | * post_op_attr dir_attributes; | |
1461 | * }; | |
1462 | * | |
1463 | * union LOOKUP3res switch (nfsstat3 status) { | |
1464 | * case NFS3_OK: | |
1465 | * LOOKUP3resok resok; | |
1466 | * default: | |
1467 | * LOOKUP3resfail resfail; | |
1468 | * }; | |
1469 | */ | |
bf269551 CL |
1470 | static int nfs3_xdr_dec_lookup3res(struct rpc_rqst *req, |
1471 | struct xdr_stream *xdr, | |
fc016483 | 1472 | void *data) |
e4f93234 | 1473 | { |
264d948c | 1474 | struct user_namespace *userns = rpc_rqst_userns(req); |
fc016483 | 1475 | struct nfs3_diropres *result = data; |
e4f93234 CL |
1476 | enum nfs_stat status; |
1477 | int error; | |
1478 | ||
bf269551 | 1479 | error = decode_nfsstat3(xdr, &status); |
e4f93234 CL |
1480 | if (unlikely(error)) |
1481 | goto out; | |
1482 | if (status != NFS3_OK) | |
1483 | goto out_default; | |
bf269551 | 1484 | error = decode_nfs_fh3(xdr, result->fh); |
e4f93234 CL |
1485 | if (unlikely(error)) |
1486 | goto out; | |
264d948c | 1487 | error = decode_post_op_attr(xdr, result->fattr, userns); |
e4f93234 CL |
1488 | if (unlikely(error)) |
1489 | goto out; | |
264d948c | 1490 | error = decode_post_op_attr(xdr, result->dir_attr, userns); |
e4f93234 CL |
1491 | out: |
1492 | return error; | |
1493 | out_default: | |
264d948c | 1494 | error = decode_post_op_attr(xdr, result->dir_attr, userns); |
e4f93234 CL |
1495 | if (unlikely(error)) |
1496 | goto out; | |
5e7e5a0d | 1497 | return nfs3_stat_to_errno(status); |
e4f93234 CL |
1498 | } |
1499 | ||
e4f93234 CL |
1500 | /* |
1501 | * 3.3.4 ACCESS3res | |
1502 | * | |
1503 | * struct ACCESS3resok { | |
1504 | * post_op_attr obj_attributes; | |
1505 | * uint32 access; | |
1506 | * }; | |
1507 | * | |
1508 | * struct ACCESS3resfail { | |
1509 | * post_op_attr obj_attributes; | |
1510 | * }; | |
1511 | * | |
1512 | * union ACCESS3res switch (nfsstat3 status) { | |
1513 | * case NFS3_OK: | |
1514 | * ACCESS3resok resok; | |
1515 | * default: | |
1516 | * ACCESS3resfail resfail; | |
1517 | * }; | |
1518 | */ | |
bf269551 CL |
1519 | static int nfs3_xdr_dec_access3res(struct rpc_rqst *req, |
1520 | struct xdr_stream *xdr, | |
fc016483 | 1521 | void *data) |
e4f93234 | 1522 | { |
fc016483 | 1523 | struct nfs3_accessres *result = data; |
e4f93234 CL |
1524 | enum nfs_stat status; |
1525 | int error; | |
1526 | ||
bf269551 | 1527 | error = decode_nfsstat3(xdr, &status); |
e4f93234 CL |
1528 | if (unlikely(error)) |
1529 | goto out; | |
264d948c | 1530 | error = decode_post_op_attr(xdr, result->fattr, rpc_rqst_userns(req)); |
e4f93234 CL |
1531 | if (unlikely(error)) |
1532 | goto out; | |
1533 | if (status != NFS3_OK) | |
1534 | goto out_default; | |
bf269551 | 1535 | error = decode_uint32(xdr, &result->access); |
e4f93234 CL |
1536 | out: |
1537 | return error; | |
1538 | out_default: | |
5e7e5a0d | 1539 | return nfs3_stat_to_errno(status); |
e4f93234 CL |
1540 | } |
1541 | ||
e4f93234 CL |
1542 | /* |
1543 | * 3.3.5 READLINK3res | |
1544 | * | |
1545 | * struct READLINK3resok { | |
1546 | * post_op_attr symlink_attributes; | |
1547 | * nfspath3 data; | |
1548 | * }; | |
1549 | * | |
1550 | * struct READLINK3resfail { | |
1551 | * post_op_attr symlink_attributes; | |
1552 | * }; | |
1553 | * | |
1554 | * union READLINK3res switch (nfsstat3 status) { | |
1555 | * case NFS3_OK: | |
1556 | * READLINK3resok resok; | |
1557 | * default: | |
1558 | * READLINK3resfail resfail; | |
1559 | * }; | |
1560 | */ | |
bf269551 CL |
1561 | static int nfs3_xdr_dec_readlink3res(struct rpc_rqst *req, |
1562 | struct xdr_stream *xdr, | |
fc016483 | 1563 | void *result) |
e4f93234 | 1564 | { |
e4f93234 CL |
1565 | enum nfs_stat status; |
1566 | int error; | |
1567 | ||
bf269551 | 1568 | error = decode_nfsstat3(xdr, &status); |
e4f93234 CL |
1569 | if (unlikely(error)) |
1570 | goto out; | |
264d948c | 1571 | error = decode_post_op_attr(xdr, result, rpc_rqst_userns(req)); |
e4f93234 CL |
1572 | if (unlikely(error)) |
1573 | goto out; | |
1574 | if (status != NFS3_OK) | |
1575 | goto out_default; | |
bf269551 | 1576 | error = decode_nfspath3(xdr); |
e4f93234 CL |
1577 | out: |
1578 | return error; | |
1579 | out_default: | |
5e7e5a0d | 1580 | return nfs3_stat_to_errno(status); |
e4f93234 CL |
1581 | } |
1582 | ||
e4f93234 CL |
1583 | /* |
1584 | * 3.3.6 READ3res | |
1585 | * | |
1586 | * struct READ3resok { | |
1587 | * post_op_attr file_attributes; | |
1588 | * count3 count; | |
1589 | * bool eof; | |
1590 | * opaque data<>; | |
1591 | * }; | |
1592 | * | |
1593 | * struct READ3resfail { | |
1594 | * post_op_attr file_attributes; | |
1595 | * }; | |
1596 | * | |
1597 | * union READ3res switch (nfsstat3 status) { | |
1598 | * case NFS3_OK: | |
1599 | * READ3resok resok; | |
1600 | * default: | |
1601 | * READ3resfail resfail; | |
1602 | * }; | |
1603 | */ | |
1604 | static int decode_read3resok(struct xdr_stream *xdr, | |
9137bdf3 | 1605 | struct nfs_pgio_res *result) |
e4f93234 CL |
1606 | { |
1607 | u32 eof, count, ocount, recvd; | |
e4f93234 CL |
1608 | __be32 *p; |
1609 | ||
1610 | p = xdr_inline_decode(xdr, 4 + 4 + 4); | |
eb72f484 CL |
1611 | if (unlikely(!p)) |
1612 | return -EIO; | |
e4f93234 CL |
1613 | count = be32_to_cpup(p++); |
1614 | eof = be32_to_cpup(p++); | |
1615 | ocount = be32_to_cpup(p++); | |
1616 | if (unlikely(ocount != count)) | |
1617 | goto out_mismatch; | |
64bd577e | 1618 | recvd = xdr_read_pages(xdr, count); |
e4f93234 CL |
1619 | if (unlikely(count > recvd)) |
1620 | goto out_cheating; | |
e4f93234 | 1621 | out: |
e4f93234 CL |
1622 | result->eof = eof; |
1623 | result->count = count; | |
1624 | return count; | |
1625 | out_mismatch: | |
1626 | dprintk("NFS: READ count doesn't match length of opaque: " | |
1627 | "count %u != ocount %u\n", count, ocount); | |
1628 | return -EIO; | |
1629 | out_cheating: | |
1630 | dprintk("NFS: server cheating in read result: " | |
1631 | "count %u > recvd %u\n", count, recvd); | |
1632 | count = recvd; | |
1633 | eof = 0; | |
1634 | goto out; | |
e4f93234 CL |
1635 | } |
1636 | ||
bf269551 | 1637 | static int nfs3_xdr_dec_read3res(struct rpc_rqst *req, struct xdr_stream *xdr, |
fc016483 | 1638 | void *data) |
e4f93234 | 1639 | { |
fc016483 | 1640 | struct nfs_pgio_res *result = data; |
8d8928d8 | 1641 | unsigned int pos; |
e4f93234 CL |
1642 | enum nfs_stat status; |
1643 | int error; | |
1644 | ||
8d8928d8 | 1645 | pos = xdr_stream_pos(xdr); |
bf269551 | 1646 | error = decode_nfsstat3(xdr, &status); |
e4f93234 CL |
1647 | if (unlikely(error)) |
1648 | goto out; | |
264d948c | 1649 | error = decode_post_op_attr(xdr, result->fattr, rpc_rqst_userns(req)); |
e4f93234 CL |
1650 | if (unlikely(error)) |
1651 | goto out; | |
aabff4dd | 1652 | result->op_status = status; |
e4f93234 CL |
1653 | if (status != NFS3_OK) |
1654 | goto out_status; | |
9ed5af26 | 1655 | result->replen = 3 + ((xdr_stream_pos(xdr) - pos) >> 2); |
bf269551 | 1656 | error = decode_read3resok(xdr, result); |
e4f93234 CL |
1657 | out: |
1658 | return error; | |
1659 | out_status: | |
5e7e5a0d | 1660 | return nfs3_stat_to_errno(status); |
e4f93234 CL |
1661 | } |
1662 | ||
e4f93234 CL |
1663 | /* |
1664 | * 3.3.7 WRITE3res | |
1665 | * | |
1666 | * enum stable_how { | |
1667 | * UNSTABLE = 0, | |
1668 | * DATA_SYNC = 1, | |
1669 | * FILE_SYNC = 2 | |
1670 | * }; | |
1671 | * | |
1672 | * struct WRITE3resok { | |
1673 | * wcc_data file_wcc; | |
1674 | * count3 count; | |
1675 | * stable_how committed; | |
1676 | * writeverf3 verf; | |
1677 | * }; | |
1678 | * | |
1679 | * struct WRITE3resfail { | |
1680 | * wcc_data file_wcc; | |
1681 | * }; | |
1682 | * | |
1683 | * union WRITE3res switch (nfsstat3 status) { | |
1684 | * case NFS3_OK: | |
1685 | * WRITE3resok resok; | |
1686 | * default: | |
1687 | * WRITE3resfail resfail; | |
1688 | * }; | |
1689 | */ | |
1690 | static int decode_write3resok(struct xdr_stream *xdr, | |
9137bdf3 | 1691 | struct nfs_pgio_res *result) |
e4f93234 CL |
1692 | { |
1693 | __be32 *p; | |
1694 | ||
2f2c63bc | 1695 | p = xdr_inline_decode(xdr, 4 + 4); |
eb72f484 CL |
1696 | if (unlikely(!p)) |
1697 | return -EIO; | |
e4f93234 CL |
1698 | result->count = be32_to_cpup(p++); |
1699 | result->verf->committed = be32_to_cpup(p++); | |
1700 | if (unlikely(result->verf->committed > NFS_FILE_SYNC)) | |
1701 | goto out_badvalue; | |
2f2c63bc | 1702 | if (decode_writeverf3(xdr, &result->verf->verifier)) |
eb72f484 | 1703 | return -EIO; |
e4f93234 CL |
1704 | return result->count; |
1705 | out_badvalue: | |
1706 | dprintk("NFS: bad stable_how value: %u\n", result->verf->committed); | |
1707 | return -EIO; | |
e4f93234 CL |
1708 | } |
1709 | ||
bf269551 | 1710 | static int nfs3_xdr_dec_write3res(struct rpc_rqst *req, struct xdr_stream *xdr, |
fc016483 | 1711 | void *data) |
e4f93234 | 1712 | { |
fc016483 | 1713 | struct nfs_pgio_res *result = data; |
e4f93234 CL |
1714 | enum nfs_stat status; |
1715 | int error; | |
1716 | ||
bf269551 | 1717 | error = decode_nfsstat3(xdr, &status); |
e4f93234 CL |
1718 | if (unlikely(error)) |
1719 | goto out; | |
264d948c | 1720 | error = decode_wcc_data(xdr, result->fattr, rpc_rqst_userns(req)); |
e4f93234 CL |
1721 | if (unlikely(error)) |
1722 | goto out; | |
aabff4dd | 1723 | result->op_status = status; |
e4f93234 CL |
1724 | if (status != NFS3_OK) |
1725 | goto out_status; | |
bf269551 | 1726 | error = decode_write3resok(xdr, result); |
e4f93234 CL |
1727 | out: |
1728 | return error; | |
1729 | out_status: | |
5e7e5a0d | 1730 | return nfs3_stat_to_errno(status); |
e4f93234 CL |
1731 | } |
1732 | ||
e4f93234 CL |
1733 | /* |
1734 | * 3.3.8 CREATE3res | |
1735 | * | |
1736 | * struct CREATE3resok { | |
1737 | * post_op_fh3 obj; | |
1738 | * post_op_attr obj_attributes; | |
1739 | * wcc_data dir_wcc; | |
1740 | * }; | |
1741 | * | |
1742 | * struct CREATE3resfail { | |
1743 | * wcc_data dir_wcc; | |
1744 | * }; | |
1745 | * | |
1746 | * union CREATE3res switch (nfsstat3 status) { | |
1747 | * case NFS3_OK: | |
1748 | * CREATE3resok resok; | |
1749 | * default: | |
1750 | * CREATE3resfail resfail; | |
1751 | * }; | |
1752 | */ | |
1753 | static int decode_create3resok(struct xdr_stream *xdr, | |
264d948c TM |
1754 | struct nfs3_diropres *result, |
1755 | struct user_namespace *userns) | |
e4f93234 CL |
1756 | { |
1757 | int error; | |
1758 | ||
1759 | error = decode_post_op_fh3(xdr, result->fh); | |
1760 | if (unlikely(error)) | |
1761 | goto out; | |
264d948c | 1762 | error = decode_post_op_attr(xdr, result->fattr, userns); |
e4f93234 CL |
1763 | if (unlikely(error)) |
1764 | goto out; | |
1765 | /* The server isn't required to return a file handle. | |
1766 | * If it didn't, force the client to perform a LOOKUP | |
1767 | * to determine the correct file handle and attribute | |
1768 | * values for the new object. */ | |
1769 | if (result->fh->size == 0) | |
1770 | result->fattr->valid = 0; | |
264d948c | 1771 | error = decode_wcc_data(xdr, result->dir_attr, userns); |
e4f93234 CL |
1772 | out: |
1773 | return error; | |
1774 | } | |
1775 | ||
bf269551 CL |
1776 | static int nfs3_xdr_dec_create3res(struct rpc_rqst *req, |
1777 | struct xdr_stream *xdr, | |
fc016483 | 1778 | void *data) |
e4f93234 | 1779 | { |
264d948c | 1780 | struct user_namespace *userns = rpc_rqst_userns(req); |
fc016483 | 1781 | struct nfs3_diropres *result = data; |
e4f93234 CL |
1782 | enum nfs_stat status; |
1783 | int error; | |
1784 | ||
bf269551 | 1785 | error = decode_nfsstat3(xdr, &status); |
e4f93234 CL |
1786 | if (unlikely(error)) |
1787 | goto out; | |
1788 | if (status != NFS3_OK) | |
1789 | goto out_default; | |
264d948c | 1790 | error = decode_create3resok(xdr, result, userns); |
e4f93234 CL |
1791 | out: |
1792 | return error; | |
1793 | out_default: | |
264d948c | 1794 | error = decode_wcc_data(xdr, result->dir_attr, userns); |
e4f93234 CL |
1795 | if (unlikely(error)) |
1796 | goto out; | |
5e7e5a0d | 1797 | return nfs3_stat_to_errno(status); |
e4f93234 CL |
1798 | } |
1799 | ||
1800 | /* | |
1801 | * 3.3.12 REMOVE3res | |
1802 | * | |
1803 | * struct REMOVE3resok { | |
1804 | * wcc_data dir_wcc; | |
1805 | * }; | |
1806 | * | |
1807 | * struct REMOVE3resfail { | |
1808 | * wcc_data dir_wcc; | |
1809 | * }; | |
1810 | * | |
1811 | * union REMOVE3res switch (nfsstat3 status) { | |
1812 | * case NFS3_OK: | |
1813 | * REMOVE3resok resok; | |
1814 | * default: | |
1815 | * REMOVE3resfail resfail; | |
1816 | * }; | |
1817 | */ | |
bf269551 CL |
1818 | static int nfs3_xdr_dec_remove3res(struct rpc_rqst *req, |
1819 | struct xdr_stream *xdr, | |
fc016483 | 1820 | void *data) |
e4f93234 | 1821 | { |
fc016483 | 1822 | struct nfs_removeres *result = data; |
e4f93234 CL |
1823 | enum nfs_stat status; |
1824 | int error; | |
1825 | ||
bf269551 | 1826 | error = decode_nfsstat3(xdr, &status); |
e4f93234 CL |
1827 | if (unlikely(error)) |
1828 | goto out; | |
264d948c | 1829 | error = decode_wcc_data(xdr, result->dir_attr, rpc_rqst_userns(req)); |
e4f93234 CL |
1830 | if (unlikely(error)) |
1831 | goto out; | |
1832 | if (status != NFS3_OK) | |
1833 | goto out_status; | |
1834 | out: | |
1835 | return error; | |
1836 | out_status: | |
5e7e5a0d | 1837 | return nfs3_stat_to_errno(status); |
e4f93234 CL |
1838 | } |
1839 | ||
e4f93234 CL |
1840 | /* |
1841 | * 3.3.14 RENAME3res | |
1842 | * | |
1843 | * struct RENAME3resok { | |
1844 | * wcc_data fromdir_wcc; | |
1845 | * wcc_data todir_wcc; | |
1846 | * }; | |
1847 | * | |
1848 | * struct RENAME3resfail { | |
1849 | * wcc_data fromdir_wcc; | |
1850 | * wcc_data todir_wcc; | |
1851 | * }; | |
1852 | * | |
1853 | * union RENAME3res switch (nfsstat3 status) { | |
1854 | * case NFS3_OK: | |
1855 | * RENAME3resok resok; | |
1856 | * default: | |
1857 | * RENAME3resfail resfail; | |
1858 | * }; | |
1859 | */ | |
bf269551 CL |
1860 | static int nfs3_xdr_dec_rename3res(struct rpc_rqst *req, |
1861 | struct xdr_stream *xdr, | |
fc016483 | 1862 | void *data) |
e4f93234 | 1863 | { |
264d948c | 1864 | struct user_namespace *userns = rpc_rqst_userns(req); |
fc016483 | 1865 | struct nfs_renameres *result = data; |
e4f93234 CL |
1866 | enum nfs_stat status; |
1867 | int error; | |
1868 | ||
bf269551 | 1869 | error = decode_nfsstat3(xdr, &status); |
e4f93234 CL |
1870 | if (unlikely(error)) |
1871 | goto out; | |
264d948c | 1872 | error = decode_wcc_data(xdr, result->old_fattr, userns); |
e4f93234 CL |
1873 | if (unlikely(error)) |
1874 | goto out; | |
264d948c | 1875 | error = decode_wcc_data(xdr, result->new_fattr, userns); |
e4f93234 CL |
1876 | if (unlikely(error)) |
1877 | goto out; | |
1878 | if (status != NFS3_OK) | |
1879 | goto out_status; | |
1880 | out: | |
1881 | return error; | |
1882 | out_status: | |
5e7e5a0d | 1883 | return nfs3_stat_to_errno(status); |
e4f93234 CL |
1884 | } |
1885 | ||
e4f93234 CL |
1886 | /* |
1887 | * 3.3.15 LINK3res | |
1888 | * | |
1889 | * struct LINK3resok { | |
1890 | * post_op_attr file_attributes; | |
1891 | * wcc_data linkdir_wcc; | |
1892 | * }; | |
1893 | * | |
1894 | * struct LINK3resfail { | |
1895 | * post_op_attr file_attributes; | |
1896 | * wcc_data linkdir_wcc; | |
1897 | * }; | |
1898 | * | |
1899 | * union LINK3res switch (nfsstat3 status) { | |
1900 | * case NFS3_OK: | |
1901 | * LINK3resok resok; | |
1902 | * default: | |
1903 | * LINK3resfail resfail; | |
1904 | * }; | |
1905 | */ | |
bf269551 | 1906 | static int nfs3_xdr_dec_link3res(struct rpc_rqst *req, struct xdr_stream *xdr, |
fc016483 | 1907 | void *data) |
e4f93234 | 1908 | { |
264d948c | 1909 | struct user_namespace *userns = rpc_rqst_userns(req); |
fc016483 | 1910 | struct nfs3_linkres *result = data; |
e4f93234 CL |
1911 | enum nfs_stat status; |
1912 | int error; | |
1913 | ||
bf269551 | 1914 | error = decode_nfsstat3(xdr, &status); |
e4f93234 CL |
1915 | if (unlikely(error)) |
1916 | goto out; | |
264d948c | 1917 | error = decode_post_op_attr(xdr, result->fattr, userns); |
e4f93234 CL |
1918 | if (unlikely(error)) |
1919 | goto out; | |
264d948c | 1920 | error = decode_wcc_data(xdr, result->dir_attr, userns); |
e4f93234 CL |
1921 | if (unlikely(error)) |
1922 | goto out; | |
1923 | if (status != NFS3_OK) | |
1924 | goto out_status; | |
1925 | out: | |
1926 | return error; | |
1927 | out_status: | |
5e7e5a0d | 1928 | return nfs3_stat_to_errno(status); |
e4f93234 CL |
1929 | } |
1930 | ||
1931 | /** | |
1932 | * nfs3_decode_dirent - Decode a single NFSv3 directory entry stored in | |
1933 | * the local page cache | |
1934 | * @xdr: XDR stream where entry resides | |
1935 | * @entry: buffer to fill in with entry data | |
e4f93234 CL |
1936 | * @plus: boolean indicating whether this should be a readdirplus entry |
1937 | * | |
573c4e1e CL |
1938 | * Returns zero if successful, otherwise a negative errno value is |
1939 | * returned. | |
e4f93234 CL |
1940 | * |
1941 | * This function is not invoked during READDIR reply decoding, but | |
1942 | * rather whenever an application invokes the getdents(2) system call | |
1943 | * on a directory already in our cache. | |
1944 | * | |
1945 | * 3.3.16 entry3 | |
1946 | * | |
1947 | * struct entry3 { | |
1948 | * fileid3 fileid; | |
1949 | * filename3 name; | |
1950 | * cookie3 cookie; | |
1951 | * fhandle3 filehandle; | |
1952 | * post_op_attr3 attributes; | |
1953 | * entry3 *nextentry; | |
1954 | * }; | |
1955 | * | |
1956 | * 3.3.17 entryplus3 | |
1957 | * struct entryplus3 { | |
1958 | * fileid3 fileid; | |
1959 | * filename3 name; | |
1960 | * cookie3 cookie; | |
1961 | * post_op_attr name_attributes; | |
1962 | * post_op_fh3 name_handle; | |
1963 | * entryplus3 *nextentry; | |
1964 | * }; | |
1965 | */ | |
573c4e1e | 1966 | int nfs3_decode_dirent(struct xdr_stream *xdr, struct nfs_entry *entry, |
a7a3b1e9 | 1967 | bool plus) |
e4f93234 | 1968 | { |
264d948c | 1969 | struct user_namespace *userns = rpc_userns(entry->server->client); |
e4f93234 CL |
1970 | struct nfs_entry old = *entry; |
1971 | __be32 *p; | |
1972 | int error; | |
98de9ce6 | 1973 | u64 new_cookie; |
e4f93234 CL |
1974 | |
1975 | p = xdr_inline_decode(xdr, 4); | |
eb72f484 CL |
1976 | if (unlikely(!p)) |
1977 | return -EAGAIN; | |
e4f93234 CL |
1978 | if (*p == xdr_zero) { |
1979 | p = xdr_inline_decode(xdr, 4); | |
eb72f484 CL |
1980 | if (unlikely(!p)) |
1981 | return -EAGAIN; | |
e4f93234 | 1982 | if (*p == xdr_zero) |
573c4e1e | 1983 | return -EAGAIN; |
e4f93234 | 1984 | entry->eof = 1; |
573c4e1e | 1985 | return -EBADCOOKIE; |
e4f93234 CL |
1986 | } |
1987 | ||
1988 | error = decode_fileid3(xdr, &entry->ino); | |
1989 | if (unlikely(error)) | |
573c4e1e | 1990 | return error; |
e4f93234 CL |
1991 | |
1992 | error = decode_inline_filename3(xdr, &entry->name, &entry->len); | |
1993 | if (unlikely(error)) | |
573c4e1e | 1994 | return error; |
e4f93234 | 1995 | |
98de9ce6 | 1996 | error = decode_cookie3(xdr, &new_cookie); |
e4f93234 | 1997 | if (unlikely(error)) |
573c4e1e | 1998 | return error; |
e4f93234 CL |
1999 | |
2000 | entry->d_type = DT_UNKNOWN; | |
2001 | ||
2002 | if (plus) { | |
2003 | entry->fattr->valid = 0; | |
264d948c | 2004 | error = decode_post_op_attr(xdr, entry->fattr, userns); |
e4f93234 | 2005 | if (unlikely(error)) |
573c4e1e | 2006 | return error; |
e4f93234 CL |
2007 | if (entry->fattr->valid & NFS_ATTR_FATTR_V3) |
2008 | entry->d_type = nfs_umode_to_dtype(entry->fattr->mode); | |
2009 | ||
1ae04b25 TM |
2010 | if (entry->fattr->fileid != entry->ino) { |
2011 | entry->fattr->mounted_on_fileid = entry->ino; | |
2012 | entry->fattr->valid |= NFS_ATTR_FATTR_MOUNTED_ON_FILEID; | |
2013 | } | |
2014 | ||
e4f93234 CL |
2015 | /* In fact, a post_op_fh3: */ |
2016 | p = xdr_inline_decode(xdr, 4); | |
eb72f484 CL |
2017 | if (unlikely(!p)) |
2018 | return -EAGAIN; | |
e4f93234 CL |
2019 | if (*p != xdr_zero) { |
2020 | error = decode_nfs_fh3(xdr, entry->fh); | |
2021 | if (unlikely(error)) { | |
2022 | if (error == -E2BIG) | |
2023 | goto out_truncated; | |
573c4e1e | 2024 | return error; |
e4f93234 CL |
2025 | } |
2026 | } else | |
2027 | zero_nfs_fh3(entry->fh); | |
2028 | } | |
2029 | ||
98de9ce6 FS |
2030 | entry->prev_cookie = entry->cookie; |
2031 | entry->cookie = new_cookie; | |
2032 | ||
573c4e1e | 2033 | return 0; |
e4f93234 | 2034 | |
e4f93234 CL |
2035 | out_truncated: |
2036 | dprintk("NFS: directory entry contains invalid file handle\n"); | |
2037 | *entry = old; | |
573c4e1e | 2038 | return -EAGAIN; |
e4f93234 CL |
2039 | } |
2040 | ||
2041 | /* | |
2042 | * 3.3.16 READDIR3res | |
2043 | * | |
2044 | * struct dirlist3 { | |
2045 | * entry3 *entries; | |
2046 | * bool eof; | |
2047 | * }; | |
2048 | * | |
2049 | * struct READDIR3resok { | |
2050 | * post_op_attr dir_attributes; | |
2051 | * cookieverf3 cookieverf; | |
2052 | * dirlist3 reply; | |
2053 | * }; | |
2054 | * | |
2055 | * struct READDIR3resfail { | |
2056 | * post_op_attr dir_attributes; | |
2057 | * }; | |
2058 | * | |
2059 | * union READDIR3res switch (nfsstat3 status) { | |
2060 | * case NFS3_OK: | |
2061 | * READDIR3resok resok; | |
2062 | * default: | |
2063 | * READDIR3resfail resfail; | |
2064 | * }; | |
2065 | * | |
2066 | * Read the directory contents into the page cache, but otherwise | |
2067 | * don't touch them. The actual decoding is done by nfs3_decode_entry() | |
2068 | * during subsequent nfs_readdir() calls. | |
2069 | */ | |
2070 | static int decode_dirlist3(struct xdr_stream *xdr) | |
2071 | { | |
64bd577e | 2072 | return xdr_read_pages(xdr, xdr->buf->page_len); |
e4f93234 CL |
2073 | } |
2074 | ||
2075 | static int decode_readdir3resok(struct xdr_stream *xdr, | |
264d948c TM |
2076 | struct nfs3_readdirres *result, |
2077 | struct user_namespace *userns) | |
e4f93234 CL |
2078 | { |
2079 | int error; | |
2080 | ||
264d948c | 2081 | error = decode_post_op_attr(xdr, result->dir_attr, userns); |
e4f93234 CL |
2082 | if (unlikely(error)) |
2083 | goto out; | |
2084 | /* XXX: do we need to check if result->verf != NULL ? */ | |
2085 | error = decode_cookieverf3(xdr, result->verf); | |
2086 | if (unlikely(error)) | |
2087 | goto out; | |
2088 | error = decode_dirlist3(xdr); | |
2089 | out: | |
2090 | return error; | |
2091 | } | |
2092 | ||
bf269551 CL |
2093 | static int nfs3_xdr_dec_readdir3res(struct rpc_rqst *req, |
2094 | struct xdr_stream *xdr, | |
fc016483 | 2095 | void *data) |
e4f93234 | 2096 | { |
fc016483 | 2097 | struct nfs3_readdirres *result = data; |
e4f93234 CL |
2098 | enum nfs_stat status; |
2099 | int error; | |
2100 | ||
bf269551 | 2101 | error = decode_nfsstat3(xdr, &status); |
e4f93234 CL |
2102 | if (unlikely(error)) |
2103 | goto out; | |
2104 | if (status != NFS3_OK) | |
2105 | goto out_default; | |
264d948c | 2106 | error = decode_readdir3resok(xdr, result, rpc_rqst_userns(req)); |
e4f93234 CL |
2107 | out: |
2108 | return error; | |
2109 | out_default: | |
264d948c | 2110 | error = decode_post_op_attr(xdr, result->dir_attr, rpc_rqst_userns(req)); |
e4f93234 CL |
2111 | if (unlikely(error)) |
2112 | goto out; | |
5e7e5a0d | 2113 | return nfs3_stat_to_errno(status); |
e4f93234 CL |
2114 | } |
2115 | ||
e4f93234 CL |
2116 | /* |
2117 | * 3.3.18 FSSTAT3res | |
2118 | * | |
2119 | * struct FSSTAT3resok { | |
2120 | * post_op_attr obj_attributes; | |
2121 | * size3 tbytes; | |
2122 | * size3 fbytes; | |
2123 | * size3 abytes; | |
2124 | * size3 tfiles; | |
2125 | * size3 ffiles; | |
2126 | * size3 afiles; | |
2127 | * uint32 invarsec; | |
2128 | * }; | |
2129 | * | |
2130 | * struct FSSTAT3resfail { | |
2131 | * post_op_attr obj_attributes; | |
2132 | * }; | |
2133 | * | |
2134 | * union FSSTAT3res switch (nfsstat3 status) { | |
2135 | * case NFS3_OK: | |
2136 | * FSSTAT3resok resok; | |
2137 | * default: | |
2138 | * FSSTAT3resfail resfail; | |
2139 | * }; | |
2140 | */ | |
2141 | static int decode_fsstat3resok(struct xdr_stream *xdr, | |
2142 | struct nfs_fsstat *result) | |
2143 | { | |
2144 | __be32 *p; | |
2145 | ||
2146 | p = xdr_inline_decode(xdr, 8 * 6 + 4); | |
eb72f484 CL |
2147 | if (unlikely(!p)) |
2148 | return -EIO; | |
e4f93234 CL |
2149 | p = xdr_decode_size3(p, &result->tbytes); |
2150 | p = xdr_decode_size3(p, &result->fbytes); | |
2151 | p = xdr_decode_size3(p, &result->abytes); | |
2152 | p = xdr_decode_size3(p, &result->tfiles); | |
2153 | p = xdr_decode_size3(p, &result->ffiles); | |
2154 | xdr_decode_size3(p, &result->afiles); | |
2155 | /* ignore invarsec */ | |
2156 | return 0; | |
e4f93234 CL |
2157 | } |
2158 | ||
bf269551 CL |
2159 | static int nfs3_xdr_dec_fsstat3res(struct rpc_rqst *req, |
2160 | struct xdr_stream *xdr, | |
fc016483 | 2161 | void *data) |
e4f93234 | 2162 | { |
fc016483 | 2163 | struct nfs_fsstat *result = data; |
e4f93234 CL |
2164 | enum nfs_stat status; |
2165 | int error; | |
2166 | ||
bf269551 | 2167 | error = decode_nfsstat3(xdr, &status); |
e4f93234 CL |
2168 | if (unlikely(error)) |
2169 | goto out; | |
264d948c | 2170 | error = decode_post_op_attr(xdr, result->fattr, rpc_rqst_userns(req)); |
e4f93234 CL |
2171 | if (unlikely(error)) |
2172 | goto out; | |
2173 | if (status != NFS3_OK) | |
2174 | goto out_status; | |
bf269551 | 2175 | error = decode_fsstat3resok(xdr, result); |
e4f93234 CL |
2176 | out: |
2177 | return error; | |
2178 | out_status: | |
5e7e5a0d | 2179 | return nfs3_stat_to_errno(status); |
e4f93234 CL |
2180 | } |
2181 | ||
e4f93234 CL |
2182 | /* |
2183 | * 3.3.19 FSINFO3res | |
2184 | * | |
2185 | * struct FSINFO3resok { | |
2186 | * post_op_attr obj_attributes; | |
2187 | * uint32 rtmax; | |
2188 | * uint32 rtpref; | |
2189 | * uint32 rtmult; | |
2190 | * uint32 wtmax; | |
2191 | * uint32 wtpref; | |
2192 | * uint32 wtmult; | |
2193 | * uint32 dtpref; | |
2194 | * size3 maxfilesize; | |
2195 | * nfstime3 time_delta; | |
2196 | * uint32 properties; | |
2197 | * }; | |
2198 | * | |
2199 | * struct FSINFO3resfail { | |
2200 | * post_op_attr obj_attributes; | |
2201 | * }; | |
2202 | * | |
2203 | * union FSINFO3res switch (nfsstat3 status) { | |
2204 | * case NFS3_OK: | |
2205 | * FSINFO3resok resok; | |
2206 | * default: | |
2207 | * FSINFO3resfail resfail; | |
2208 | * }; | |
2209 | */ | |
2210 | static int decode_fsinfo3resok(struct xdr_stream *xdr, | |
2211 | struct nfs_fsinfo *result) | |
2212 | { | |
2213 | __be32 *p; | |
2214 | ||
2215 | p = xdr_inline_decode(xdr, 4 * 7 + 8 + 8 + 4); | |
eb72f484 CL |
2216 | if (unlikely(!p)) |
2217 | return -EIO; | |
e4f93234 CL |
2218 | result->rtmax = be32_to_cpup(p++); |
2219 | result->rtpref = be32_to_cpup(p++); | |
2220 | result->rtmult = be32_to_cpup(p++); | |
2221 | result->wtmax = be32_to_cpup(p++); | |
2222 | result->wtpref = be32_to_cpup(p++); | |
2223 | result->wtmult = be32_to_cpup(p++); | |
2224 | result->dtpref = be32_to_cpup(p++); | |
2225 | p = xdr_decode_size3(p, &result->maxfilesize); | |
f6048709 | 2226 | xdr_decode_nfstime3(p, &result->time_delta); |
e4f93234 CL |
2227 | |
2228 | /* ignore properties */ | |
2229 | result->lease_time = 0; | |
7f08a335 | 2230 | result->change_attr_type = NFS4_CHANGE_TYPE_IS_TIME_METADATA; |
e4f93234 | 2231 | return 0; |
e4f93234 CL |
2232 | } |
2233 | ||
bf269551 CL |
2234 | static int nfs3_xdr_dec_fsinfo3res(struct rpc_rqst *req, |
2235 | struct xdr_stream *xdr, | |
fc016483 | 2236 | void *data) |
e4f93234 | 2237 | { |
fc016483 | 2238 | struct nfs_fsinfo *result = data; |
e4f93234 CL |
2239 | enum nfs_stat status; |
2240 | int error; | |
2241 | ||
bf269551 | 2242 | error = decode_nfsstat3(xdr, &status); |
e4f93234 CL |
2243 | if (unlikely(error)) |
2244 | goto out; | |
264d948c | 2245 | error = decode_post_op_attr(xdr, result->fattr, rpc_rqst_userns(req)); |
e4f93234 CL |
2246 | if (unlikely(error)) |
2247 | goto out; | |
2248 | if (status != NFS3_OK) | |
2249 | goto out_status; | |
bf269551 | 2250 | error = decode_fsinfo3resok(xdr, result); |
e4f93234 CL |
2251 | out: |
2252 | return error; | |
2253 | out_status: | |
5e7e5a0d | 2254 | return nfs3_stat_to_errno(status); |
e4f93234 CL |
2255 | } |
2256 | ||
e4f93234 CL |
2257 | /* |
2258 | * 3.3.20 PATHCONF3res | |
2259 | * | |
2260 | * struct PATHCONF3resok { | |
2261 | * post_op_attr obj_attributes; | |
2262 | * uint32 linkmax; | |
2263 | * uint32 name_max; | |
2264 | * bool no_trunc; | |
2265 | * bool chown_restricted; | |
2266 | * bool case_insensitive; | |
2267 | * bool case_preserving; | |
2268 | * }; | |
2269 | * | |
2270 | * struct PATHCONF3resfail { | |
2271 | * post_op_attr obj_attributes; | |
2272 | * }; | |
2273 | * | |
2274 | * union PATHCONF3res switch (nfsstat3 status) { | |
2275 | * case NFS3_OK: | |
2276 | * PATHCONF3resok resok; | |
2277 | * default: | |
2278 | * PATHCONF3resfail resfail; | |
2279 | * }; | |
2280 | */ | |
2281 | static int decode_pathconf3resok(struct xdr_stream *xdr, | |
2282 | struct nfs_pathconf *result) | |
2283 | { | |
2284 | __be32 *p; | |
2285 | ||
2286 | p = xdr_inline_decode(xdr, 4 * 6); | |
eb72f484 CL |
2287 | if (unlikely(!p)) |
2288 | return -EIO; | |
e4f93234 CL |
2289 | result->max_link = be32_to_cpup(p++); |
2290 | result->max_namelen = be32_to_cpup(p); | |
2291 | /* ignore remaining fields */ | |
2292 | return 0; | |
e4f93234 CL |
2293 | } |
2294 | ||
bf269551 CL |
2295 | static int nfs3_xdr_dec_pathconf3res(struct rpc_rqst *req, |
2296 | struct xdr_stream *xdr, | |
fc016483 | 2297 | void *data) |
e4f93234 | 2298 | { |
fc016483 | 2299 | struct nfs_pathconf *result = data; |
e4f93234 CL |
2300 | enum nfs_stat status; |
2301 | int error; | |
2302 | ||
bf269551 | 2303 | error = decode_nfsstat3(xdr, &status); |
e4f93234 CL |
2304 | if (unlikely(error)) |
2305 | goto out; | |
264d948c | 2306 | error = decode_post_op_attr(xdr, result->fattr, rpc_rqst_userns(req)); |
e4f93234 CL |
2307 | if (unlikely(error)) |
2308 | goto out; | |
2309 | if (status != NFS3_OK) | |
2310 | goto out_status; | |
bf269551 | 2311 | error = decode_pathconf3resok(xdr, result); |
e4f93234 CL |
2312 | out: |
2313 | return error; | |
2314 | out_status: | |
5e7e5a0d | 2315 | return nfs3_stat_to_errno(status); |
e4f93234 CL |
2316 | } |
2317 | ||
e4f93234 CL |
2318 | /* |
2319 | * 3.3.21 COMMIT3res | |
2320 | * | |
2321 | * struct COMMIT3resok { | |
2322 | * wcc_data file_wcc; | |
2323 | * writeverf3 verf; | |
2324 | * }; | |
2325 | * | |
2326 | * struct COMMIT3resfail { | |
2327 | * wcc_data file_wcc; | |
2328 | * }; | |
2329 | * | |
2330 | * union COMMIT3res switch (nfsstat3 status) { | |
2331 | * case NFS3_OK: | |
2332 | * COMMIT3resok resok; | |
2333 | * default: | |
2334 | * COMMIT3resfail resfail; | |
2335 | * }; | |
2336 | */ | |
bf269551 CL |
2337 | static int nfs3_xdr_dec_commit3res(struct rpc_rqst *req, |
2338 | struct xdr_stream *xdr, | |
fc016483 | 2339 | void *data) |
e4f93234 | 2340 | { |
fc016483 | 2341 | struct nfs_commitres *result = data; |
221203ce | 2342 | struct nfs_writeverf *verf = result->verf; |
e4f93234 CL |
2343 | enum nfs_stat status; |
2344 | int error; | |
2345 | ||
bf269551 | 2346 | error = decode_nfsstat3(xdr, &status); |
e4f93234 CL |
2347 | if (unlikely(error)) |
2348 | goto out; | |
264d948c | 2349 | error = decode_wcc_data(xdr, result->fattr, rpc_rqst_userns(req)); |
e4f93234 CL |
2350 | if (unlikely(error)) |
2351 | goto out; | |
aabff4dd | 2352 | result->op_status = status; |
e4f93234 CL |
2353 | if (status != NFS3_OK) |
2354 | goto out_status; | |
221203ce TM |
2355 | error = decode_writeverf3(xdr, &verf->verifier); |
2356 | if (!error) | |
2357 | verf->committed = NFS_FILE_SYNC; | |
e4f93234 CL |
2358 | out: |
2359 | return error; | |
2360 | out_status: | |
5e7e5a0d | 2361 | return nfs3_stat_to_errno(status); |
e4f93234 CL |
2362 | } |
2363 | ||
b7fa0554 | 2364 | #ifdef CONFIG_NFS_V3_ACL |
b7fa0554 | 2365 | |
e4f93234 | 2366 | static inline int decode_getacl3resok(struct xdr_stream *xdr, |
264d948c TM |
2367 | struct nfs3_getaclres *result, |
2368 | struct user_namespace *userns) | |
e4f93234 CL |
2369 | { |
2370 | struct posix_acl **acl; | |
2371 | unsigned int *aclcnt; | |
2372 | size_t hdrlen; | |
2373 | int error; | |
2374 | ||
264d948c | 2375 | error = decode_post_op_attr(xdr, result->fattr, userns); |
e4f93234 CL |
2376 | if (unlikely(error)) |
2377 | goto out; | |
2378 | error = decode_uint32(xdr, &result->mask); | |
2379 | if (unlikely(error)) | |
2380 | goto out; | |
2381 | error = -EINVAL; | |
2382 | if (result->mask & ~(NFS_ACL|NFS_ACLCNT|NFS_DFACL|NFS_DFACLCNT)) | |
2383 | goto out; | |
2384 | ||
1aecca3e | 2385 | hdrlen = xdr_stream_pos(xdr); |
e4f93234 CL |
2386 | |
2387 | acl = NULL; | |
2388 | if (result->mask & NFS_ACL) | |
2389 | acl = &result->acl_access; | |
2390 | aclcnt = NULL; | |
2391 | if (result->mask & NFS_ACLCNT) | |
2392 | aclcnt = &result->acl_access_count; | |
2393 | error = nfsacl_decode(xdr->buf, hdrlen, aclcnt, acl); | |
2394 | if (unlikely(error <= 0)) | |
2395 | goto out; | |
2396 | ||
2397 | acl = NULL; | |
2398 | if (result->mask & NFS_DFACL) | |
2399 | acl = &result->acl_default; | |
2400 | aclcnt = NULL; | |
2401 | if (result->mask & NFS_DFACLCNT) | |
2402 | aclcnt = &result->acl_default_count; | |
2403 | error = nfsacl_decode(xdr->buf, hdrlen + error, aclcnt, acl); | |
2404 | if (unlikely(error <= 0)) | |
2405 | return error; | |
2406 | error = 0; | |
2407 | out: | |
2408 | return error; | |
2409 | } | |
2410 | ||
bf269551 CL |
2411 | static int nfs3_xdr_dec_getacl3res(struct rpc_rqst *req, |
2412 | struct xdr_stream *xdr, | |
fc016483 | 2413 | void *result) |
e4f93234 | 2414 | { |
e4f93234 CL |
2415 | enum nfs_stat status; |
2416 | int error; | |
2417 | ||
bf269551 | 2418 | error = decode_nfsstat3(xdr, &status); |
e4f93234 CL |
2419 | if (unlikely(error)) |
2420 | goto out; | |
2421 | if (status != NFS3_OK) | |
2422 | goto out_default; | |
264d948c | 2423 | error = decode_getacl3resok(xdr, result, rpc_rqst_userns(req)); |
e4f93234 CL |
2424 | out: |
2425 | return error; | |
2426 | out_default: | |
5e7e5a0d | 2427 | return nfs3_stat_to_errno(status); |
e4f93234 CL |
2428 | } |
2429 | ||
bf269551 CL |
2430 | static int nfs3_xdr_dec_setacl3res(struct rpc_rqst *req, |
2431 | struct xdr_stream *xdr, | |
fc016483 | 2432 | void *result) |
e4f93234 | 2433 | { |
e4f93234 CL |
2434 | enum nfs_stat status; |
2435 | int error; | |
2436 | ||
bf269551 | 2437 | error = decode_nfsstat3(xdr, &status); |
e4f93234 CL |
2438 | if (unlikely(error)) |
2439 | goto out; | |
2440 | if (status != NFS3_OK) | |
2441 | goto out_default; | |
264d948c | 2442 | error = decode_post_op_attr(xdr, result, rpc_rqst_userns(req)); |
e4f93234 CL |
2443 | out: |
2444 | return error; | |
2445 | out_default: | |
5e7e5a0d | 2446 | return nfs3_stat_to_errno(status); |
e4f93234 CL |
2447 | } |
2448 | ||
b7fa0554 AG |
2449 | #endif /* CONFIG_NFS_V3_ACL */ |
2450 | ||
5e7e5a0d BS |
2451 | |
2452 | /* | |
2453 | * We need to translate between nfs status return values and | |
2454 | * the local errno values which may not be the same. | |
2455 | */ | |
2456 | static const struct { | |
2457 | int stat; | |
2458 | int errno; | |
2459 | } nfs_errtbl[] = { | |
2460 | { NFS_OK, 0 }, | |
2461 | { NFSERR_PERM, -EPERM }, | |
2462 | { NFSERR_NOENT, -ENOENT }, | |
2463 | { NFSERR_IO, -errno_NFSERR_IO}, | |
2464 | { NFSERR_NXIO, -ENXIO }, | |
2465 | /* { NFSERR_EAGAIN, -EAGAIN }, */ | |
2466 | { NFSERR_ACCES, -EACCES }, | |
2467 | { NFSERR_EXIST, -EEXIST }, | |
2468 | { NFSERR_XDEV, -EXDEV }, | |
2469 | { NFSERR_NODEV, -ENODEV }, | |
2470 | { NFSERR_NOTDIR, -ENOTDIR }, | |
2471 | { NFSERR_ISDIR, -EISDIR }, | |
2472 | { NFSERR_INVAL, -EINVAL }, | |
2473 | { NFSERR_FBIG, -EFBIG }, | |
2474 | { NFSERR_NOSPC, -ENOSPC }, | |
2475 | { NFSERR_ROFS, -EROFS }, | |
2476 | { NFSERR_MLINK, -EMLINK }, | |
2477 | { NFSERR_NAMETOOLONG, -ENAMETOOLONG }, | |
2478 | { NFSERR_NOTEMPTY, -ENOTEMPTY }, | |
2479 | { NFSERR_DQUOT, -EDQUOT }, | |
2480 | { NFSERR_STALE, -ESTALE }, | |
2481 | { NFSERR_REMOTE, -EREMOTE }, | |
2482 | #ifdef EWFLUSH | |
2483 | { NFSERR_WFLUSH, -EWFLUSH }, | |
2484 | #endif | |
2485 | { NFSERR_BADHANDLE, -EBADHANDLE }, | |
2486 | { NFSERR_NOT_SYNC, -ENOTSYNC }, | |
2487 | { NFSERR_BAD_COOKIE, -EBADCOOKIE }, | |
2488 | { NFSERR_NOTSUPP, -ENOTSUPP }, | |
2489 | { NFSERR_TOOSMALL, -ETOOSMALL }, | |
2490 | { NFSERR_SERVERFAULT, -EREMOTEIO }, | |
2491 | { NFSERR_BADTYPE, -EBADTYPE }, | |
2492 | { NFSERR_JUKEBOX, -EJUKEBOX }, | |
2493 | { -1, -EIO } | |
2494 | }; | |
2495 | ||
2496 | /** | |
2497 | * nfs3_stat_to_errno - convert an NFS status code to a local errno | |
2498 | * @status: NFS status code to convert | |
2499 | * | |
2500 | * Returns a local errno value, or -EIO if the NFS status code is | |
2501 | * not recognized. This function is used jointly by NFSv2 and NFSv3. | |
2502 | */ | |
2503 | static int nfs3_stat_to_errno(enum nfs_stat status) | |
2504 | { | |
2505 | int i; | |
2506 | ||
2507 | for (i = 0; nfs_errtbl[i].stat != -1; i++) { | |
2508 | if (nfs_errtbl[i].stat == (int)status) | |
2509 | return nfs_errtbl[i].errno; | |
2510 | } | |
2511 | dprintk("NFS: Unrecognized nfs status value: %u\n", status); | |
2512 | return nfs_errtbl[i].errno; | |
2513 | } | |
2514 | ||
2515 | ||
1da177e4 LT |
2516 | #define PROC(proc, argtype, restype, timer) \ |
2517 | [NFS3PROC_##proc] = { \ | |
2518 | .p_proc = NFS3PROC_##proc, \ | |
fcc85819 | 2519 | .p_encode = nfs3_xdr_enc_##argtype##3args, \ |
fc016483 | 2520 | .p_decode = nfs3_xdr_dec_##restype##3res, \ |
ad96b5b5 | 2521 | .p_arglen = NFS3_##argtype##args_sz, \ |
f5fc3c50 | 2522 | .p_replen = NFS3_##restype##res_sz, \ |
cc0175c1 CL |
2523 | .p_timer = timer, \ |
2524 | .p_statidx = NFS3PROC_##proc, \ | |
2525 | .p_name = #proc, \ | |
1da177e4 LT |
2526 | } |
2527 | ||
511e936b | 2528 | const struct rpc_procinfo nfs3_procedures[] = { |
f5fc3c50 CL |
2529 | PROC(GETATTR, getattr, getattr, 1), |
2530 | PROC(SETATTR, setattr, setattr, 0), | |
2531 | PROC(LOOKUP, lookup, lookup, 2), | |
2532 | PROC(ACCESS, access, access, 1), | |
2533 | PROC(READLINK, readlink, readlink, 3), | |
2534 | PROC(READ, read, read, 3), | |
2535 | PROC(WRITE, write, write, 4), | |
2536 | PROC(CREATE, create, create, 0), | |
2537 | PROC(MKDIR, mkdir, create, 0), | |
2538 | PROC(SYMLINK, symlink, create, 0), | |
2539 | PROC(MKNOD, mknod, create, 0), | |
2540 | PROC(REMOVE, remove, remove, 0), | |
2541 | PROC(RMDIR, lookup, setattr, 0), | |
2542 | PROC(RENAME, rename, rename, 0), | |
2543 | PROC(LINK, link, link, 0), | |
2544 | PROC(READDIR, readdir, readdir, 3), | |
2545 | PROC(READDIRPLUS, readdirplus, readdir, 3), | |
2546 | PROC(FSSTAT, getattr, fsstat, 0), | |
2547 | PROC(FSINFO, getattr, fsinfo, 0), | |
2548 | PROC(PATHCONF, getattr, pathconf, 0), | |
2549 | PROC(COMMIT, commit, commit, 5), | |
1da177e4 LT |
2550 | }; |
2551 | ||
c551858a | 2552 | static unsigned int nfs_version3_counts[ARRAY_SIZE(nfs3_procedures)]; |
a613fa16 | 2553 | const struct rpc_version nfs_version3 = { |
1da177e4 | 2554 | .number = 3, |
e8c96f8c | 2555 | .nrprocs = ARRAY_SIZE(nfs3_procedures), |
c551858a CH |
2556 | .procs = nfs3_procedures, |
2557 | .counts = nfs_version3_counts, | |
1da177e4 LT |
2558 | }; |
2559 | ||
b7fa0554 | 2560 | #ifdef CONFIG_NFS_V3_ACL |
511e936b | 2561 | static const struct rpc_procinfo nfs3_acl_procedures[] = { |
b7fa0554 AG |
2562 | [ACLPROC3_GETACL] = { |
2563 | .p_proc = ACLPROC3_GETACL, | |
fcc85819 | 2564 | .p_encode = nfs3_xdr_enc_getacl3args, |
fc016483 | 2565 | .p_decode = nfs3_xdr_dec_getacl3res, |
2bea90d4 CL |
2566 | .p_arglen = ACL3_getaclargs_sz, |
2567 | .p_replen = ACL3_getaclres_sz, | |
b7fa0554 | 2568 | .p_timer = 1, |
cc0175c1 | 2569 | .p_name = "GETACL", |
b7fa0554 AG |
2570 | }, |
2571 | [ACLPROC3_SETACL] = { | |
2572 | .p_proc = ACLPROC3_SETACL, | |
fcc85819 | 2573 | .p_encode = nfs3_xdr_enc_setacl3args, |
fc016483 | 2574 | .p_decode = nfs3_xdr_dec_setacl3res, |
2bea90d4 CL |
2575 | .p_arglen = ACL3_setaclargs_sz, |
2576 | .p_replen = ACL3_setaclres_sz, | |
b7fa0554 | 2577 | .p_timer = 0, |
cc0175c1 | 2578 | .p_name = "SETACL", |
b7fa0554 AG |
2579 | }, |
2580 | }; | |
2581 | ||
c551858a | 2582 | static unsigned int nfs3_acl_counts[ARRAY_SIZE(nfs3_acl_procedures)]; |
a613fa16 | 2583 | const struct rpc_version nfsacl_version3 = { |
b7fa0554 | 2584 | .number = 3, |
9ae7d8ff | 2585 | .nrprocs = ARRAY_SIZE(nfs3_acl_procedures), |
b7fa0554 | 2586 | .procs = nfs3_acl_procedures, |
c551858a | 2587 | .counts = nfs3_acl_counts, |
b7fa0554 AG |
2588 | }; |
2589 | #endif /* CONFIG_NFS_V3_ACL */ |