blob: 60f032be805ae5dc1a123d49f5098a4dfe95c045 [file] [log] [blame]
Greg Kroah-Hartmanb2441312017-11-01 15:07:57 +01001// SPDX-License-Identifier: GPL-2.0
Linus Torvalds1da177e2005-04-16 15:20:36 -07002/*
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>
Linus Torvalds1da177e2005-04-16 15:20:36 -070013#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>
Andreas Gruenbacherb7fa0552005-06-22 17:16:27 +000023#include <linux/nfsacl.h>
Chuck Leverf23f6582019-02-11 11:24:26 -050024#include "nfstrace.h"
David Howellsf7b422b2006-06-09 09:34:33 -040025#include "internal.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070026
27#define NFSDBG_FACILITY NFSDBG_XDR
28
29/* Mapping from NFS error code to "errno" error code. */
30#define errno_NFSERR_IO EIO
31
Linus Torvalds1da177e2005-04-16 15:20:36 -070032/*
33 * Declare the space requirements for NFS arguments and replies as
34 * number of 32bit-words
35 */
Trond Myklebust9ed5af262020-11-21 20:46:18 -050036#define NFS3_pagepad_sz (1) /* Page padding */
Linus Torvalds1da177e2005-04-16 15:20:36 -070037#define NFS3_fhandle_sz (1+16)
38#define NFS3_fh_sz (NFS3_fhandle_sz) /* shorthand */
Frank Sorensonad3dbe32021-03-08 12:12:13 -060039#define NFS3_post_op_fh_sz (1+NFS3_fh_sz)
Linus Torvalds1da177e2005-04-16 15:20:36 -070040#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)
Chuck Leverd9c407b2010-12-14 14:55:50 +000044#define NFS3_cookieverf_sz (NFS3_COOKIEVERFSIZE>>2)
Chuck Leverf5fc3c502010-12-14 14:56:42 +000045#define NFS3_wcc_attr_sz (6)
Linus Torvalds1da177e2005-04-16 15:20:36 -070046#define NFS3_pre_op_attr_sz (1+NFS3_wcc_attr_sz)
47#define NFS3_post_op_attr_sz (1+NFS3_fattr_sz)
Chuck Leverf5fc3c502010-12-14 14:56:42 +000048#define NFS3_wcc_data_sz (NFS3_pre_op_attr_sz+NFS3_post_op_attr_sz)
Linus Torvalds1da177e2005-04-16 15:20:36 -070049#define NFS3_diropargs_sz (NFS3_fh_sz+NFS3_filename_sz)
Chuck Leverad96b5b2010-12-14 14:56:01 +000050
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)
Linus Torvalds1da177e2005-04-16 15:20:36 -070054#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)
Chuck Lever94a6d752006-08-22 20:06:23 -040060#define NFS3_symlinkargs_sz (NFS3_diropargs_sz+1+NFS3_sattr_sz)
Linus Torvalds1da177e2005-04-16 15:20:36 -070061#define NFS3_mknodargs_sz (NFS3_diropargs_sz+2+NFS3_sattr_sz)
Chuck Leverad96b5b2010-12-14 14:56:01 +000062#define NFS3_removeargs_sz (NFS3_fh_sz+NFS3_filename_sz)
Linus Torvalds1da177e2005-04-16 15:20:36 -070063#define NFS3_renameargs_sz (NFS3_diropargs_sz+NFS3_diropargs_sz)
64#define NFS3_linkargs_sz (NFS3_fh_sz+NFS3_diropargs_sz)
Chuck Leverd9c407b2010-12-14 14:55:50 +000065#define NFS3_readdirargs_sz (NFS3_fh_sz+NFS3_cookieverf_sz+3)
66#define NFS3_readdirplusargs_sz (NFS3_fh_sz+NFS3_cookieverf_sz+4)
Linus Torvalds1da177e2005-04-16 15:20:36 -070067#define NFS3_commitargs_sz (NFS3_fh_sz+3)
68
Chuck Leverf5fc3c502010-12-14 14:56:42 +000069#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)
Linus Torvalds1da177e2005-04-16 15:20:36 -070072#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)
Trond Myklebust9ed5af262020-11-21 20:46:18 -050074#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)
Linus Torvalds1da177e2005-04-16 15:20:36 -070076#define NFS3_writeres_sz (1+NFS3_wcc_data_sz+4)
Frank Sorensonad3dbe32021-03-08 12:12:13 -060077#define NFS3_createres_sz (1+NFS3_post_op_fh_sz+NFS3_post_op_attr_sz+NFS3_wcc_data_sz)
Linus Torvalds1da177e2005-04-16 15:20:36 -070078#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)
Trond Myklebust9ed5af262020-11-21 20:46:18 -050080#define NFS3_readdirres_sz (1+NFS3_post_op_attr_sz+2+NFS3_pagepad_sz)
Linus Torvalds1da177e2005-04-16 15:20:36 -070081#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
Andreas Gruenbacherb7fa0552005-06-22 17:16:27 +000086#define ACL3_getaclargs_sz (NFS3_fh_sz+1)
Trond Myklebustae46141f2009-03-10 20:33:18 -040087#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+ \
Trond Myklebust9ed5af262020-11-21 20:46:18 -050090 XDR_QUADLEN(NFS_ACL_INLINE_BUFSIZE)+\
91 NFS3_pagepad_sz)
Andreas Gruenbacherb7fa0552005-06-22 17:16:27 +000092#define ACL3_setaclres_sz (1+NFS3_post_op_attr_sz)
93
Bryan Schumaker5e7e5a02012-05-10 16:47:18 -040094static int nfs3_stat_to_errno(enum nfs_stat);
95
Linus Torvalds1da177e2005-04-16 15:20:36 -070096/*
97 * Map file type to S_IFMT bits
98 */
Trond Myklebustbca79472009-03-11 14:10:26 -040099static 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,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700108};
109
Trond Myklebust264d9482019-04-24 17:46:46 -0400110static 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
117static 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
Linus Torvalds1da177e2005-04-16 15:20:36 -0700124/*
Chuck Leverd9c407b2010-12-14 14:55:50 +0000125 * 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
135static 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
Chuck Levere4f93232010-12-14 14:56:30 +0000141static int decode_uint32(struct xdr_stream *xdr, u32 *value)
142{
143 __be32 *p;
144
145 p = xdr_inline_decode(xdr, 4);
Chuck Levereb72f482019-02-11 11:24:21 -0500146 if (unlikely(!p))
147 return -EIO;
Chuck Levere4f93232010-12-14 14:56:30 +0000148 *value = be32_to_cpup(p);
149 return 0;
Chuck Levere4f93232010-12-14 14:56:30 +0000150}
151
152static int decode_uint64(struct xdr_stream *xdr, u64 *value)
153{
154 __be32 *p;
155
156 p = xdr_inline_decode(xdr, 8);
Chuck Levereb72f482019-02-11 11:24:21 -0500157 if (unlikely(!p))
158 return -EIO;
Chuck Levere4f93232010-12-14 14:56:30 +0000159 xdr_decode_hyper(p, value);
160 return 0;
Chuck Levere4f93232010-12-14 14:56:30 +0000161}
162
163/*
164 * fileid3
165 *
166 * typedef uint64 fileid3;
167 */
Chuck Leverf6048702010-12-14 14:57:02 +0000168static __be32 *xdr_decode_fileid3(__be32 *p, u64 *fileid)
169{
170 return xdr_decode_hyper(p, fileid);
171}
172
Chuck Levere4f93232010-12-14 14:56:30 +0000173static int decode_fileid3(struct xdr_stream *xdr, u64 *fileid)
174{
175 return decode_uint64(xdr, fileid);
176}
177
Chuck Leverd9c407b2010-12-14 14:55:50 +0000178/*
179 * filename3
180 *
181 * typedef string filename3<>;
182 */
183static void encode_filename3(struct xdr_stream *xdr,
184 const char *name, u32 length)
185{
186 __be32 *p;
187
Trond Myklebust7fc38842012-10-15 11:51:21 -0400188 WARN_ON_ONCE(length > NFS3_MAXNAMLEN);
Chuck Leverd9c407b2010-12-14 14:55:50 +0000189 p = xdr_reserve_space(xdr, 4 + length);
190 xdr_encode_opaque(p, name, length);
191}
192
Chuck Levere4f93232010-12-14 14:56:30 +0000193static 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);
Chuck Levereb72f482019-02-11 11:24:21 -0500200 if (unlikely(!p))
201 return -EIO;
Chuck Levere4f93232010-12-14 14:56:30 +0000202 count = be32_to_cpup(p);
203 if (count > NFS3_MAXNAMLEN)
204 goto out_nametoolong;
205 p = xdr_inline_decode(xdr, count);
Chuck Levereb72f482019-02-11 11:24:21 -0500206 if (unlikely(!p))
207 return -EIO;
Chuck Levere4f93232010-12-14 14:56:30 +0000208 *name = (const char *)p;
209 *length = count;
210 return 0;
211
212out_nametoolong:
213 dprintk("NFS: returned filename too long: %u\n", count);
214 return -ENAMETOOLONG;
Chuck Levere4f93232010-12-14 14:56:30 +0000215}
216
Chuck Leverd9c407b2010-12-14 14:55:50 +0000217/*
218 * nfspath3
219 *
220 * typedef string nfspath3<>;
221 */
222static void encode_nfspath3(struct xdr_stream *xdr, struct page **pages,
223 const u32 length)
224{
Chuck Leverd9c407b2010-12-14 14:55:50 +0000225 encode_uint32(xdr, length);
226 xdr_write_pages(xdr, pages, 0, length);
227}
228
Chuck Levere4f93232010-12-14 14:56:30 +0000229static int decode_nfspath3(struct xdr_stream *xdr)
230{
231 u32 recvd, count;
Chuck Levere4f93232010-12-14 14:56:30 +0000232 __be32 *p;
233
234 p = xdr_inline_decode(xdr, 4);
Chuck Levereb72f482019-02-11 11:24:21 -0500235 if (unlikely(!p))
236 return -EIO;
Chuck Levere4f93232010-12-14 14:56:30 +0000237 count = be32_to_cpup(p);
238 if (unlikely(count >= xdr->buf->page_len || count > NFS3_MAXPATHLEN))
239 goto out_nametoolong;
Trond Myklebust64bd5772012-06-20 22:35:05 -0400240 recvd = xdr_read_pages(xdr, count);
Chuck Levere4f93232010-12-14 14:56:30 +0000241 if (unlikely(count > recvd))
242 goto out_cheating;
Chuck Levere4f93232010-12-14 14:56:30 +0000243 xdr_terminate_string(xdr->buf, count);
244 return 0;
245
246out_nametoolong:
247 dprintk("NFS: returned pathname too long: %u\n", count);
248 return -ENAMETOOLONG;
249out_cheating:
250 dprintk("NFS: server cheating in pathname result: "
251 "count %u > recvd %u\n", count, recvd);
252 return -EIO;
Chuck Levere4f93232010-12-14 14:56:30 +0000253}
254
Chuck Leverd9c407b2010-12-14 14:55:50 +0000255/*
256 * cookie3
257 *
258 * typedef uint64 cookie3
259 */
260static __be32 *xdr_encode_cookie3(__be32 *p, u64 cookie)
261{
262 return xdr_encode_hyper(p, cookie);
263}
264
Chuck Levere4f93232010-12-14 14:56:30 +0000265static int decode_cookie3(struct xdr_stream *xdr, u64 *cookie)
266{
267 return decode_uint64(xdr, cookie);
268}
269
Chuck Leverd9c407b2010-12-14 14:55:50 +0000270/*
271 * cookieverf3
272 *
273 * typedef opaque cookieverf3[NFS3_COOKIEVERFSIZE];
274 */
275static __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
Chuck Levere4f93232010-12-14 14:56:30 +0000281static int decode_cookieverf3(struct xdr_stream *xdr, __be32 *verifier)
282{
283 __be32 *p;
284
285 p = xdr_inline_decode(xdr, NFS3_COOKIEVERFSIZE);
Chuck Levereb72f482019-02-11 11:24:21 -0500286 if (unlikely(!p))
287 return -EIO;
Chuck Levere4f93232010-12-14 14:56:30 +0000288 memcpy(verifier, p, NFS3_COOKIEVERFSIZE);
289 return 0;
Chuck Levere4f93232010-12-14 14:56:30 +0000290}
291
Chuck Leverd9c407b2010-12-14 14:55:50 +0000292/*
293 * createverf3
294 *
295 * typedef opaque createverf3[NFS3_CREATEVERFSIZE];
296 */
297static 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
Trond Myklebust2f2c63b2012-06-08 11:56:09 -0400305static int decode_writeverf3(struct xdr_stream *xdr, struct nfs_write_verifier *verifier)
Chuck Levere4f93232010-12-14 14:56:30 +0000306{
307 __be32 *p;
308
309 p = xdr_inline_decode(xdr, NFS3_WRITEVERFSIZE);
Chuck Levereb72f482019-02-11 11:24:21 -0500310 if (unlikely(!p))
311 return -EIO;
Trond Myklebust2f2c63b2012-06-08 11:56:09 -0400312 memcpy(verifier->data, p, NFS3_WRITEVERFSIZE);
Chuck Levere4f93232010-12-14 14:56:30 +0000313 return 0;
Chuck Levere4f93232010-12-14 14:56:30 +0000314}
315
316/*
317 * size3
318 *
319 * typedef uint64 size3;
320 */
321static __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
336static int decode_nfsstat3(struct xdr_stream *xdr, enum nfs_stat *status)
337{
338 __be32 *p;
339
340 p = xdr_inline_decode(xdr, 4);
Chuck Levereb72f482019-02-11 11:24:21 -0500341 if (unlikely(!p))
342 return -EIO;
Chuck Leverf23f6582019-02-11 11:24:26 -0500343 if (unlikely(*p != cpu_to_be32(NFS3_OK)))
344 goto out_status;
345 *status = 0;
346 return 0;
347out_status:
Chuck Levere4f93232010-12-14 14:56:30 +0000348 *status = be32_to_cpup(p);
Chuck Lever62a92ba2019-06-19 10:34:09 -0400349 trace_nfs_xdr_status(xdr, (int)*status);
Chuck Levere4f93232010-12-14 14:56:30 +0000350 return 0;
Chuck Levere4f93232010-12-14 14:56:30 +0000351}
352
Chuck Leverd9c407b2010-12-14 14:55:50 +0000353/*
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 */
366static void encode_ftype3(struct xdr_stream *xdr, const u32 type)
367{
Chuck Leverd9c407b2010-12-14 14:55:50 +0000368 encode_uint32(xdr, type);
369}
370
Chuck Leverf6048702010-12-14 14:57:02 +0000371static __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
Chuck Leverd9c407b2010-12-14 14:55:50 +0000382/*
383 * specdata3
384 *
385 * struct specdata3 {
386 * uint32 specdata1;
387 * uint32 specdata2;
388 * };
389 */
390static 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
Chuck Leverf6048702010-12-14 14:57:02 +0000399static __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
Chuck Leverd9c407b2010-12-14 14:55:50 +0000411/*
412 * nfs_fh3
413 *
414 * struct nfs_fh3 {
415 * opaque data<NFS3_FHSIZE>;
416 * };
417 */
418static void encode_nfs_fh3(struct xdr_stream *xdr, const struct nfs_fh *fh)
419{
420 __be32 *p;
421
Trond Myklebust7fc38842012-10-15 11:51:21 -0400422 WARN_ON_ONCE(fh->size > NFS3_FHSIZE);
Chuck Leverd9c407b2010-12-14 14:55:50 +0000423 p = xdr_reserve_space(xdr, 4 + fh->size);
424 xdr_encode_opaque(p, fh->data, fh->size);
425}
426
Chuck Levere4f93232010-12-14 14:56:30 +0000427static 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);
Chuck Levereb72f482019-02-11 11:24:21 -0500433 if (unlikely(!p))
434 return -EIO;
Chuck Levere4f93232010-12-14 14:56:30 +0000435 length = be32_to_cpup(p++);
Trond Myklebusteb3d58c2021-04-01 14:03:26 -0400436 if (unlikely(length > NFS3_FHSIZE || length == 0))
Chuck Levere4f93232010-12-14 14:56:30 +0000437 goto out_toobig;
438 p = xdr_inline_decode(xdr, length);
Chuck Levereb72f482019-02-11 11:24:21 -0500439 if (unlikely(!p))
440 return -EIO;
Chuck Levere4f93232010-12-14 14:56:30 +0000441 fh->size = length;
442 memcpy(fh->data, p, length);
443 return 0;
444out_toobig:
Trond Myklebusteb3d58c2021-04-01 14:03:26 -0400445 trace_nfs_xdr_bad_filehandle(xdr, NFSERR_BADHANDLE);
Chuck Levere4f93232010-12-14 14:56:30 +0000446 return -E2BIG;
Chuck Levere4f93232010-12-14 14:56:30 +0000447}
448
449static void zero_nfs_fh3(struct nfs_fh *fh)
450{
451 memset(fh, 0, sizeof(*fh));
452}
453
Chuck Leverd9c407b2010-12-14 14:55:50 +0000454/*
Chuck Lever9d5a6432010-12-14 14:56:20 +0000455 * nfstime3
456 *
457 * struct nfstime3 {
458 * uint32 seconds;
459 * uint32 nseconds;
460 * };
461 */
Trond Myklebust6430b322019-10-04 17:00:02 -0400462static __be32 *xdr_encode_nfstime3(__be32 *p, const struct timespec64 *timep)
Chuck Lever9d5a6432010-12-14 14:56:20 +0000463{
Trond Myklebust6430b322019-10-04 17:00:02 -0400464 *p++ = cpu_to_be32((u32)timep->tv_sec);
Chuck Lever9d5a6432010-12-14 14:56:20 +0000465 *p++ = cpu_to_be32(timep->tv_nsec);
466 return p;
467}
468
Trond Myklebuste86d5a02019-10-04 16:38:56 -0400469static __be32 *xdr_decode_nfstime3(__be32 *p, struct timespec64 *timep)
Chuck Leverf6048702010-12-14 14:57:02 +0000470{
471 timep->tv_sec = be32_to_cpup(p++);
472 timep->tv_nsec = be32_to_cpup(p++);
473 return p;
474}
475
Chuck Lever9d5a6432010-12-14 14:56:20 +0000476/*
Chuck Leverd9c407b2010-12-14 14:55:50 +0000477 * 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 */
Trond Myklebust264d9482019-04-24 17:46:46 -0400536static void encode_sattr3(struct xdr_stream *xdr, const struct iattr *attr,
537 struct user_namespace *userns)
Chuck Leverd9c407b2010-12-14 14:55:50 +0000538{
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
Chuck Lever9d5a6432010-12-14 14:56:20 +0000563 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;
Trond Myklebust264d9482019-04-24 17:46:46 -0400571 *p++ = cpu_to_be32(from_kuid_munged(userns, attr->ia_uid));
Chuck Lever9d5a6432010-12-14 14:56:20 +0000572 } else
573 *p++ = xdr_zero;
574
575 if (attr->ia_valid & ATTR_GID) {
576 *p++ = xdr_one;
Trond Myklebust264d9482019-04-24 17:46:46 -0400577 *p++ = cpu_to_be32(from_kgid_munged(userns, attr->ia_gid));
Chuck Lever9d5a6432010-12-14 14:56:20 +0000578 } 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;
Trond Myklebust6430b322019-10-04 17:00:02 -0400589 p = xdr_encode_nfstime3(p, &attr->ia_atime);
Chuck Lever9d5a6432010-12-14 14:56:20 +0000590 } 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;
Trond Myklebust6430b322019-10-04 17:00:02 -0400597 xdr_encode_nfstime3(p, &attr->ia_mtime);
Chuck Lever9d5a6432010-12-14 14:56:20 +0000598 } else if (attr->ia_valid & ATTR_MTIME) {
599 *p = xdr_one;
600 } else
601 *p = xdr_zero;
Chuck Leverd9c407b2010-12-14 14:55:50 +0000602}
603
604/*
Chuck Levere4f93232010-12-14 14:56:30 +0000605 * 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 */
Trond Myklebust264d9482019-04-24 17:46:46 -0400623static int decode_fattr3(struct xdr_stream *xdr, struct nfs_fattr *fattr,
624 struct user_namespace *userns)
Chuck Levere4f93232010-12-14 14:56:30 +0000625{
Chuck Leverf6048702010-12-14 14:57:02 +0000626 umode_t fmode;
Chuck Levere4f93232010-12-14 14:56:30 +0000627 __be32 *p;
628
629 p = xdr_inline_decode(xdr, NFS3_fattr_sz << 2);
Chuck Levereb72f482019-02-11 11:24:21 -0500630 if (unlikely(!p))
631 return -EIO;
Chuck Leverf6048702010-12-14 14:57:02 +0000632
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++);
Trond Myklebust264d9482019-04-24 17:46:46 -0400637 fattr->uid = make_kuid(userns, be32_to_cpup(p++));
Eric W. Biederman57a38da2013-02-01 03:50:00 -0800638 if (!uid_valid(fattr->uid))
639 goto out_uid;
Trond Myklebust264d9482019-04-24 17:46:46 -0400640 fattr->gid = make_kgid(userns, be32_to_cpup(p++));
Eric W. Biederman57a38da2013-02-01 03:50:00 -0800641 if (!gid_valid(fattr->gid))
642 goto out_gid;
Chuck Leverf6048702010-12-14 14:57:02 +0000643
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);
Trond Myklebust3a1556e2012-04-27 13:48:18 -0400655 fattr->change_attr = nfs_timespec_to_change_attr(&fattr->ctime);
Chuck Leverf6048702010-12-14 14:57:02 +0000656
657 fattr->valid |= NFS_ATTR_FATTR_V3;
Chuck Levere4f93232010-12-14 14:56:30 +0000658 return 0;
Eric W. Biederman57a38da2013-02-01 03:50:00 -0800659out_uid:
660 dprintk("NFS: returned invalid uid\n");
661 return -EINVAL;
662out_gid:
663 dprintk("NFS: returned invalid gid\n");
664 return -EINVAL;
Chuck Levere4f93232010-12-14 14:56:30 +0000665}
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 */
Trond Myklebust264d9482019-04-24 17:46:46 -0400677static int decode_post_op_attr(struct xdr_stream *xdr, struct nfs_fattr *fattr,
678 struct user_namespace *userns)
Chuck Levere4f93232010-12-14 14:56:30 +0000679{
680 __be32 *p;
681
682 p = xdr_inline_decode(xdr, 4);
Chuck Levereb72f482019-02-11 11:24:21 -0500683 if (unlikely(!p))
684 return -EIO;
Chuck Levere4f93232010-12-14 14:56:30 +0000685 if (*p != xdr_zero)
Trond Myklebust264d9482019-04-24 17:46:46 -0400686 return decode_fattr3(xdr, fattr, userns);
Chuck Levere4f93232010-12-14 14:56:30 +0000687 return 0;
Chuck Levere4f93232010-12-14 14:56:30 +0000688}
689
690/*
691 * wcc_attr
692 * struct wcc_attr {
693 * size3 size;
694 * nfstime3 mtime;
695 * nfstime3 ctime;
696 * };
697 */
698static 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);
Chuck Levereb72f482019-02-11 11:24:21 -0500703 if (unlikely(!p))
704 return -EIO;
Chuck Leverf6048702010-12-14 14:57:02 +0000705
706 fattr->valid |= NFS_ATTR_FATTR_PRESIZE
Trond Myklebust3a1556e2012-04-27 13:48:18 -0400707 | NFS_ATTR_FATTR_PRECHANGE
Chuck Leverf6048702010-12-14 14:57:02 +0000708 | 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);
Trond Myklebust3a1556e2012-04-27 13:48:18 -0400714 fattr->pre_change_attr = nfs_timespec_to_change_attr(&fattr->pre_ctime);
Chuck Leverf6048702010-12-14 14:57:02 +0000715
Chuck Levere4f93232010-12-14 14:56:30 +0000716 return 0;
Chuck Levere4f93232010-12-14 14:56:30 +0000717}
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 */
735static 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);
Chuck Levereb72f482019-02-11 11:24:21 -0500740 if (unlikely(!p))
741 return -EIO;
Chuck Levere4f93232010-12-14 14:56:30 +0000742 if (*p != xdr_zero)
743 return decode_wcc_attr(xdr, fattr);
744 return 0;
Chuck Levere4f93232010-12-14 14:56:30 +0000745}
746
Trond Myklebust264d9482019-04-24 17:46:46 -0400747static int decode_wcc_data(struct xdr_stream *xdr, struct nfs_fattr *fattr,
748 struct user_namespace *userns)
Chuck Levere4f93232010-12-14 14:56:30 +0000749{
750 int error;
751
752 error = decode_pre_op_attr(xdr, fattr);
753 if (unlikely(error))
754 goto out;
Trond Myklebust264d9482019-04-24 17:46:46 -0400755 error = decode_post_op_attr(xdr, fattr, userns);
Chuck Levere4f93232010-12-14 14:56:30 +0000756out:
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 */
770static int decode_post_op_fh3(struct xdr_stream *xdr, struct nfs_fh *fh)
771{
772 __be32 *p = xdr_inline_decode(xdr, 4);
Chuck Levereb72f482019-02-11 11:24:21 -0500773 if (unlikely(!p))
774 return -EIO;
Chuck Levere4f93232010-12-14 14:56:30 +0000775 if (*p != xdr_zero)
776 return decode_nfs_fh3(xdr, fh);
777 zero_nfs_fh3(fh);
778 return 0;
Chuck Levere4f93232010-12-14 14:56:30 +0000779}
780
781/*
Chuck Leverd9c407b2010-12-14 14:55:50 +0000782 * diropargs3
783 *
784 * struct diropargs3 {
785 * nfs_fh3 dir;
786 * filename3 name;
787 * };
788 */
789static 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
Linus Torvalds1da177e2005-04-16 15:20:36 -0700797/*
Chuck Lever499ff712010-12-14 14:56:10 +0000798 * NFSv3 XDR encode functions
799 *
800 * NFSv3 argument types are defined in section 3.3 of RFC 1813:
801 * "NFS Version 3 Protocol Specification".
Linus Torvalds1da177e2005-04-16 15:20:36 -0700802 */
803
804/*
Chuck Leverd9c407b2010-12-14 14:55:50 +0000805 * 3.3.1 GETATTR3args
806 *
807 * struct GETATTR3args {
808 * nfs_fh3 object;
809 * };
810 */
Chuck Lever9f06c712010-12-14 14:59:18 +0000811static void nfs3_xdr_enc_getattr3args(struct rpc_rqst *req,
812 struct xdr_stream *xdr,
Christoph Hellwigfcc85812017-05-08 10:01:49 +0200813 const void *data)
Chuck Leverd9c407b2010-12-14 14:55:50 +0000814{
Christoph Hellwigfcc85812017-05-08 10:01:49 +0200815 const struct nfs_fh *fh = data;
816
Chuck Lever9f06c712010-12-14 14:59:18 +0000817 encode_nfs_fh3(xdr, fh);
Chuck Leverd9c407b2010-12-14 14:55:50 +0000818}
819
820/*
Chuck Leverd9c407b2010-12-14 14:55:50 +0000821 * 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 */
836static 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;
Chuck Lever9d5a6432010-12-14 14:56:20 +0000844 xdr_encode_nfstime3(p, &args->guardtime);
Chuck Leverd9c407b2010-12-14 14:55:50 +0000845 } else {
846 p = xdr_reserve_space(xdr, 4);
847 *p = xdr_zero;
848 }
849}
850
Chuck Lever9f06c712010-12-14 14:59:18 +0000851static void nfs3_xdr_enc_setattr3args(struct rpc_rqst *req,
852 struct xdr_stream *xdr,
Christoph Hellwigfcc85812017-05-08 10:01:49 +0200853 const void *data)
Chuck Leverd9c407b2010-12-14 14:55:50 +0000854{
Christoph Hellwigfcc85812017-05-08 10:01:49 +0200855 const struct nfs3_sattrargs *args = data;
Chuck Lever9f06c712010-12-14 14:59:18 +0000856 encode_nfs_fh3(xdr, args->fh);
Trond Myklebust264d9482019-04-24 17:46:46 -0400857 encode_sattr3(xdr, args->sattr, rpc_rqst_userns(req));
Chuck Lever9f06c712010-12-14 14:59:18 +0000858 encode_sattrguard3(xdr, args);
Chuck Leverd9c407b2010-12-14 14:55:50 +0000859}
860
861/*
Chuck Leverd9c407b2010-12-14 14:55:50 +0000862 * 3.3.3 LOOKUP3args
863 *
864 * struct LOOKUP3args {
865 * diropargs3 what;
866 * };
867 */
Chuck Lever9f06c712010-12-14 14:59:18 +0000868static void nfs3_xdr_enc_lookup3args(struct rpc_rqst *req,
869 struct xdr_stream *xdr,
Christoph Hellwigfcc85812017-05-08 10:01:49 +0200870 const void *data)
Chuck Leverd9c407b2010-12-14 14:55:50 +0000871{
Christoph Hellwigfcc85812017-05-08 10:01:49 +0200872 const struct nfs3_diropargs *args = data;
873
Chuck Lever9f06c712010-12-14 14:59:18 +0000874 encode_diropargs3(xdr, args->fh, args->name, args->len);
Chuck Leverd9c407b2010-12-14 14:55:50 +0000875}
876
877/*
Chuck Leverd9c407b2010-12-14 14:55:50 +0000878 * 3.3.4 ACCESS3args
879 *
880 * struct ACCESS3args {
881 * nfs_fh3 object;
882 * uint32 access;
883 * };
884 */
885static 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
Chuck Lever9f06c712010-12-14 14:59:18 +0000892static void nfs3_xdr_enc_access3args(struct rpc_rqst *req,
893 struct xdr_stream *xdr,
Christoph Hellwigfcc85812017-05-08 10:01:49 +0200894 const void *data)
Chuck Leverd9c407b2010-12-14 14:55:50 +0000895{
Christoph Hellwigfcc85812017-05-08 10:01:49 +0200896 const struct nfs3_accessargs *args = data;
897
Chuck Lever9f06c712010-12-14 14:59:18 +0000898 encode_access3args(xdr, args);
Chuck Leverd9c407b2010-12-14 14:55:50 +0000899}
900
901/*
902 * 3.3.5 READLINK3args
903 *
904 * struct READLINK3args {
905 * nfs_fh3 symlink;
906 * };
907 */
Chuck Lever9f06c712010-12-14 14:59:18 +0000908static void nfs3_xdr_enc_readlink3args(struct rpc_rqst *req,
909 struct xdr_stream *xdr,
Christoph Hellwigfcc85812017-05-08 10:01:49 +0200910 const void *data)
Chuck Leverd9c407b2010-12-14 14:55:50 +0000911{
Christoph Hellwigfcc85812017-05-08 10:01:49 +0200912 const struct nfs3_readlinkargs *args = data;
913
Chuck Lever9f06c712010-12-14 14:59:18 +0000914 encode_nfs_fh3(xdr, args->fh);
Trond Myklebust9ed5af262020-11-21 20:46:18 -0500915 rpc_prepare_reply_pages(req, args->pages, args->pgbase, args->pglen,
916 NFS3_readlinkres_sz - NFS3_pagepad_sz);
Chuck Leverd9c407b2010-12-14 14:55:50 +0000917}
918
919/*
Chuck Leverd9c407b2010-12-14 14:55:50 +0000920 * 3.3.6 READ3args
921 *
922 * struct READ3args {
923 * nfs_fh3 file;
924 * offset3 offset;
925 * count3 count;
926 * };
927 */
928static void encode_read3args(struct xdr_stream *xdr,
Anna Schumaker3c6b8992014-05-06 09:12:24 -0400929 const struct nfs_pgio_args *args)
Chuck Leverd9c407b2010-12-14 14:55:50 +0000930{
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
Chuck Lever9f06c712010-12-14 14:59:18 +0000940static void nfs3_xdr_enc_read3args(struct rpc_rqst *req,
941 struct xdr_stream *xdr,
Christoph Hellwigfcc85812017-05-08 10:01:49 +0200942 const void *data)
Chuck Leverd9c407b2010-12-14 14:55:50 +0000943{
Christoph Hellwigfcc85812017-05-08 10:01:49 +0200944 const struct nfs_pgio_args *args = data;
Trond Myklebust9ed5af262020-11-21 20:46:18 -0500945 unsigned int replen = args->replen ? args->replen :
946 NFS3_readres_sz - NFS3_pagepad_sz;
Christoph Hellwigfcc85812017-05-08 10:01:49 +0200947
Chuck Lever9f06c712010-12-14 14:59:18 +0000948 encode_read3args(xdr, args);
Chuck Levercf500ba2019-02-11 11:25:20 -0500949 rpc_prepare_reply_pages(req, args->pages, args->pgbase,
950 args->count, replen);
Chuck Leverd9c407b2010-12-14 14:55:50 +0000951 req->rq_rcv_buf.flags |= XDRBUF_READ;
Chuck Leverd9c407b2010-12-14 14:55:50 +0000952}
953
954/*
Chuck Leverd9c407b2010-12-14 14:55:50 +0000955 * 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 */
971static void encode_write3args(struct xdr_stream *xdr,
Anna Schumaker3c6b8992014-05-06 09:12:24 -0400972 const struct nfs_pgio_args *args)
Chuck Leverd9c407b2010-12-14 14:55:50 +0000973{
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);
Chuck Leverd9c407b2010-12-14 14:55:50 +0000981 *p++ = cpu_to_be32(args->stable);
Chuck Leverd9c407b2010-12-14 14:55:50 +0000982 *p = cpu_to_be32(args->count);
983 xdr_write_pages(xdr, args->pages, args->pgbase, args->count);
984}
985
Chuck Lever9f06c712010-12-14 14:59:18 +0000986static void nfs3_xdr_enc_write3args(struct rpc_rqst *req,
987 struct xdr_stream *xdr,
Christoph Hellwigfcc85812017-05-08 10:01:49 +0200988 const void *data)
Chuck Leverd9c407b2010-12-14 14:55:50 +0000989{
Christoph Hellwigfcc85812017-05-08 10:01:49 +0200990 const struct nfs_pgio_args *args = data;
991
Chuck Lever9f06c712010-12-14 14:59:18 +0000992 encode_write3args(xdr, args);
993 xdr->buf->flags |= XDRBUF_WRITE;
Chuck Leverd9c407b2010-12-14 14:55:50 +0000994}
995
996/*
Chuck Leverd9c407b2010-12-14 14:55:50 +0000997 * 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 */
1018static void encode_createhow3(struct xdr_stream *xdr,
Trond Myklebust264d9482019-04-24 17:46:46 -04001019 const struct nfs3_createargs *args,
1020 struct user_namespace *userns)
Chuck Leverd9c407b2010-12-14 14:55:50 +00001021{
1022 encode_uint32(xdr, args->createmode);
1023 switch (args->createmode) {
1024 case NFS3_CREATE_UNCHECKED:
1025 case NFS3_CREATE_GUARDED:
Trond Myklebust264d9482019-04-24 17:46:46 -04001026 encode_sattr3(xdr, args->sattr, userns);
Chuck Leverd9c407b2010-12-14 14:55:50 +00001027 break;
1028 case NFS3_CREATE_EXCLUSIVE:
1029 encode_createverf3(xdr, args->verifier);
1030 break;
1031 default:
1032 BUG();
1033 }
1034}
1035
Chuck Lever9f06c712010-12-14 14:59:18 +00001036static void nfs3_xdr_enc_create3args(struct rpc_rqst *req,
1037 struct xdr_stream *xdr,
Christoph Hellwigfcc85812017-05-08 10:01:49 +02001038 const void *data)
Chuck Leverd9c407b2010-12-14 14:55:50 +00001039{
Christoph Hellwigfcc85812017-05-08 10:01:49 +02001040 const struct nfs3_createargs *args = data;
1041
Chuck Lever9f06c712010-12-14 14:59:18 +00001042 encode_diropargs3(xdr, args->fh, args->name, args->len);
Trond Myklebust264d9482019-04-24 17:46:46 -04001043 encode_createhow3(xdr, args, rpc_rqst_userns(req));
Chuck Leverd9c407b2010-12-14 14:55:50 +00001044}
1045
1046/*
Chuck Leverd9c407b2010-12-14 14:55:50 +00001047 * 3.3.9 MKDIR3args
1048 *
1049 * struct MKDIR3args {
1050 * diropargs3 where;
1051 * sattr3 attributes;
1052 * };
1053 */
Chuck Lever9f06c712010-12-14 14:59:18 +00001054static void nfs3_xdr_enc_mkdir3args(struct rpc_rqst *req,
1055 struct xdr_stream *xdr,
Christoph Hellwigfcc85812017-05-08 10:01:49 +02001056 const void *data)
Chuck Leverd9c407b2010-12-14 14:55:50 +00001057{
Christoph Hellwigfcc85812017-05-08 10:01:49 +02001058 const struct nfs3_mkdirargs *args = data;
1059
Chuck Lever9f06c712010-12-14 14:59:18 +00001060 encode_diropargs3(xdr, args->fh, args->name, args->len);
Trond Myklebust264d9482019-04-24 17:46:46 -04001061 encode_sattr3(xdr, args->sattr, rpc_rqst_userns(req));
Chuck Leverd9c407b2010-12-14 14:55:50 +00001062}
1063
1064/*
Chuck Leverd9c407b2010-12-14 14:55:50 +00001065 * 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 */
1077static void encode_symlinkdata3(struct xdr_stream *xdr,
Trond Myklebust264d9482019-04-24 17:46:46 -04001078 const void *data,
1079 struct user_namespace *userns)
Chuck Leverd9c407b2010-12-14 14:55:50 +00001080{
Christoph Hellwigfcc85812017-05-08 10:01:49 +02001081 const struct nfs3_symlinkargs *args = data;
1082
Trond Myklebust264d9482019-04-24 17:46:46 -04001083 encode_sattr3(xdr, args->sattr, userns);
Chuck Leverd9c407b2010-12-14 14:55:50 +00001084 encode_nfspath3(xdr, args->pages, args->pathlen);
1085}
1086
Chuck Lever9f06c712010-12-14 14:59:18 +00001087static void nfs3_xdr_enc_symlink3args(struct rpc_rqst *req,
1088 struct xdr_stream *xdr,
Christoph Hellwigfcc85812017-05-08 10:01:49 +02001089 const void *data)
Chuck Leverd9c407b2010-12-14 14:55:50 +00001090{
Christoph Hellwigfcc85812017-05-08 10:01:49 +02001091 const struct nfs3_symlinkargs *args = data;
1092
Chuck Lever9f06c712010-12-14 14:59:18 +00001093 encode_diropargs3(xdr, args->fromfh, args->fromname, args->fromlen);
Trond Myklebust264d9482019-04-24 17:46:46 -04001094 encode_symlinkdata3(xdr, args, rpc_rqst_userns(req));
Chuck Lever2fcc2132015-08-03 13:04:26 -04001095 xdr->buf->flags |= XDRBUF_WRITE;
Chuck Leverd9c407b2010-12-14 14:55:50 +00001096}
1097
1098/*
Chuck Leverd9c407b2010-12-14 14:55:50 +00001099 * 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 */
1122static void encode_devicedata3(struct xdr_stream *xdr,
Trond Myklebust264d9482019-04-24 17:46:46 -04001123 const struct nfs3_mknodargs *args,
1124 struct user_namespace *userns)
Chuck Leverd9c407b2010-12-14 14:55:50 +00001125{
Trond Myklebust264d9482019-04-24 17:46:46 -04001126 encode_sattr3(xdr, args->sattr, userns);
Chuck Leverd9c407b2010-12-14 14:55:50 +00001127 encode_specdata3(xdr, args->rdev);
1128}
1129
1130static void encode_mknoddata3(struct xdr_stream *xdr,
Trond Myklebust264d9482019-04-24 17:46:46 -04001131 const struct nfs3_mknodargs *args,
1132 struct user_namespace *userns)
Chuck Leverd9c407b2010-12-14 14:55:50 +00001133{
1134 encode_ftype3(xdr, args->type);
1135 switch (args->type) {
1136 case NF3CHR:
1137 case NF3BLK:
Trond Myklebust264d9482019-04-24 17:46:46 -04001138 encode_devicedata3(xdr, args, userns);
Chuck Leverd9c407b2010-12-14 14:55:50 +00001139 break;
1140 case NF3SOCK:
1141 case NF3FIFO:
Trond Myklebust264d9482019-04-24 17:46:46 -04001142 encode_sattr3(xdr, args->sattr, userns);
Chuck Leverd9c407b2010-12-14 14:55:50 +00001143 break;
1144 case NF3REG:
1145 case NF3DIR:
1146 break;
1147 default:
1148 BUG();
1149 }
1150}
1151
Chuck Lever9f06c712010-12-14 14:59:18 +00001152static void nfs3_xdr_enc_mknod3args(struct rpc_rqst *req,
1153 struct xdr_stream *xdr,
Christoph Hellwigfcc85812017-05-08 10:01:49 +02001154 const void *data)
Chuck Leverd9c407b2010-12-14 14:55:50 +00001155{
Christoph Hellwigfcc85812017-05-08 10:01:49 +02001156 const struct nfs3_mknodargs *args = data;
1157
Chuck Lever9f06c712010-12-14 14:59:18 +00001158 encode_diropargs3(xdr, args->fh, args->name, args->len);
Trond Myklebust264d9482019-04-24 17:46:46 -04001159 encode_mknoddata3(xdr, args, rpc_rqst_userns(req));
Chuck Leverd9c407b2010-12-14 14:55:50 +00001160}
1161
1162/*
1163 * 3.3.12 REMOVE3args
1164 *
1165 * struct REMOVE3args {
1166 * diropargs3 object;
1167 * };
1168 */
Chuck Lever9f06c712010-12-14 14:59:18 +00001169static void nfs3_xdr_enc_remove3args(struct rpc_rqst *req,
1170 struct xdr_stream *xdr,
Christoph Hellwigfcc85812017-05-08 10:01:49 +02001171 const void *data)
Chuck Leverd9c407b2010-12-14 14:55:50 +00001172{
Christoph Hellwigfcc85812017-05-08 10:01:49 +02001173 const struct nfs_removeargs *args = data;
1174
Chuck Lever9f06c712010-12-14 14:59:18 +00001175 encode_diropargs3(xdr, args->fh, args->name.name, args->name.len);
Chuck Leverd9c407b2010-12-14 14:55:50 +00001176}
1177
1178/*
Chuck Leverd9c407b2010-12-14 14:55:50 +00001179 * 3.3.14 RENAME3args
1180 *
1181 * struct RENAME3args {
1182 * diropargs3 from;
1183 * diropargs3 to;
1184 * };
1185 */
Chuck Lever9f06c712010-12-14 14:59:18 +00001186static void nfs3_xdr_enc_rename3args(struct rpc_rqst *req,
1187 struct xdr_stream *xdr,
Christoph Hellwigfcc85812017-05-08 10:01:49 +02001188 const void *data)
Chuck Leverd9c407b2010-12-14 14:55:50 +00001189{
Christoph Hellwigfcc85812017-05-08 10:01:49 +02001190 const struct nfs_renameargs *args = data;
Chuck Leverd9c407b2010-12-14 14:55:50 +00001191 const struct qstr *old = args->old_name;
1192 const struct qstr *new = args->new_name;
Chuck Leverd9c407b2010-12-14 14:55:50 +00001193
Chuck Lever9f06c712010-12-14 14:59:18 +00001194 encode_diropargs3(xdr, args->old_dir, old->name, old->len);
1195 encode_diropargs3(xdr, args->new_dir, new->name, new->len);
Chuck Leverd9c407b2010-12-14 14:55:50 +00001196}
1197
1198/*
Chuck Leverd9c407b2010-12-14 14:55:50 +00001199 * 3.3.15 LINK3args
1200 *
1201 * struct LINK3args {
1202 * nfs_fh3 file;
1203 * diropargs3 link;
1204 * };
1205 */
Chuck Lever9f06c712010-12-14 14:59:18 +00001206static void nfs3_xdr_enc_link3args(struct rpc_rqst *req,
1207 struct xdr_stream *xdr,
Christoph Hellwigfcc85812017-05-08 10:01:49 +02001208 const void *data)
Chuck Leverd9c407b2010-12-14 14:55:50 +00001209{
Christoph Hellwigfcc85812017-05-08 10:01:49 +02001210 const struct nfs3_linkargs *args = data;
1211
Chuck Lever9f06c712010-12-14 14:59:18 +00001212 encode_nfs_fh3(xdr, args->fromfh);
1213 encode_diropargs3(xdr, args->tofh, args->toname, args->tolen);
Chuck Leverd9c407b2010-12-14 14:55:50 +00001214}
1215
1216/*
Chuck Leverd9c407b2010-12-14 14:55:50 +00001217 * 3.3.16 READDIR3args
1218 *
1219 * struct READDIR3args {
1220 * nfs_fh3 dir;
1221 * cookie3 cookie;
1222 * cookieverf3 cookieverf;
1223 * count3 count;
1224 * };
1225 */
1226static 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
Chuck Lever9f06c712010-12-14 14:59:18 +00001239static void nfs3_xdr_enc_readdir3args(struct rpc_rqst *req,
1240 struct xdr_stream *xdr,
Christoph Hellwigfcc85812017-05-08 10:01:49 +02001241 const void *data)
Chuck Leverd9c407b2010-12-14 14:55:50 +00001242{
Christoph Hellwigfcc85812017-05-08 10:01:49 +02001243 const struct nfs3_readdirargs *args = data;
1244
Chuck Lever9f06c712010-12-14 14:59:18 +00001245 encode_readdir3args(xdr, args);
Trond Myklebust9ed5af262020-11-21 20:46:18 -05001246 rpc_prepare_reply_pages(req, args->pages, 0, args->count,
1247 NFS3_readdirres_sz - NFS3_pagepad_sz);
Chuck Leverd9c407b2010-12-14 14:55:50 +00001248}
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 */
1261static void encode_readdirplus3args(struct xdr_stream *xdr,
1262 const struct nfs3_readdirargs *args)
1263{
Trond Myklebustc49c68942022-02-18 12:04:06 -05001264 uint32_t dircount = args->count;
1265 uint32_t maxcount = args->count;
Chuck Leverd9c407b2010-12-14 14:55:50 +00001266 __be32 *p;
1267
1268 encode_nfs_fh3(xdr, args->fh);
1269
1270 p = xdr_reserve_space(xdr, 8 + NFS3_COOKIEVERFSIZE + 4 + 4);
1271 p = xdr_encode_cookie3(p, args->cookie);
1272 p = xdr_encode_cookieverf3(p, args->verf);
1273
1274 /*
1275 * readdirplus: need dircount + buffer size.
1276 * We just make sure we make dircount big enough
1277 */
Trond Myklebustc49c68942022-02-18 12:04:06 -05001278 *p++ = cpu_to_be32(dircount);
1279 *p = cpu_to_be32(maxcount);
Chuck Leverd9c407b2010-12-14 14:55:50 +00001280}
1281
Chuck Lever9f06c712010-12-14 14:59:18 +00001282static void nfs3_xdr_enc_readdirplus3args(struct rpc_rqst *req,
1283 struct xdr_stream *xdr,
Christoph Hellwigfcc85812017-05-08 10:01:49 +02001284 const void *data)
Chuck Leverd9c407b2010-12-14 14:55:50 +00001285{
Christoph Hellwigfcc85812017-05-08 10:01:49 +02001286 const struct nfs3_readdirargs *args = data;
1287
Chuck Lever9f06c712010-12-14 14:59:18 +00001288 encode_readdirplus3args(xdr, args);
Trond Myklebust9ed5af262020-11-21 20:46:18 -05001289 rpc_prepare_reply_pages(req, args->pages, 0, args->count,
1290 NFS3_readdirres_sz - NFS3_pagepad_sz);
Chuck Leverd9c407b2010-12-14 14:55:50 +00001291}
1292
1293/*
Chuck Leverd9c407b2010-12-14 14:55:50 +00001294 * 3.3.21 COMMIT3args
1295 *
1296 * struct COMMIT3args {
1297 * nfs_fh3 file;
1298 * offset3 offset;
1299 * count3 count;
1300 * };
1301 */
1302static void encode_commit3args(struct xdr_stream *xdr,
Fred Isaman0b7c0152012-04-20 14:47:39 -04001303 const struct nfs_commitargs *args)
Chuck Leverd9c407b2010-12-14 14:55:50 +00001304{
1305 __be32 *p;
1306
1307 encode_nfs_fh3(xdr, args->fh);
1308
1309 p = xdr_reserve_space(xdr, 8 + 4);
1310 p = xdr_encode_hyper(p, args->offset);
1311 *p = cpu_to_be32(args->count);
1312}
1313
Chuck Lever9f06c712010-12-14 14:59:18 +00001314static void nfs3_xdr_enc_commit3args(struct rpc_rqst *req,
1315 struct xdr_stream *xdr,
Christoph Hellwigfcc85812017-05-08 10:01:49 +02001316 const void *data)
Chuck Leverd9c407b2010-12-14 14:55:50 +00001317{
Christoph Hellwigfcc85812017-05-08 10:01:49 +02001318 const struct nfs_commitargs *args = data;
1319
Chuck Lever9f06c712010-12-14 14:59:18 +00001320 encode_commit3args(xdr, args);
Chuck Leverd9c407b2010-12-14 14:55:50 +00001321}
1322
Andreas Gruenbacherb7fa0552005-06-22 17:16:27 +00001323#ifdef CONFIG_NFS_V3_ACL
Andreas Gruenbacherb7fa0552005-06-22 17:16:27 +00001324
Chuck Lever9f06c712010-12-14 14:59:18 +00001325static void nfs3_xdr_enc_getacl3args(struct rpc_rqst *req,
1326 struct xdr_stream *xdr,
Christoph Hellwigfcc85812017-05-08 10:01:49 +02001327 const void *data)
Chuck Leverd9c407b2010-12-14 14:55:50 +00001328{
Christoph Hellwigfcc85812017-05-08 10:01:49 +02001329 const struct nfs3_getaclargs *args = data;
1330
Chuck Lever9f06c712010-12-14 14:59:18 +00001331 encode_nfs_fh3(xdr, args->fh);
1332 encode_uint32(xdr, args->mask);
Trond Myklebust431f6eb2018-09-16 00:08:20 -04001333 if (args->mask & (NFS_ACL | NFS_DFACL)) {
Chuck Levercf500ba2019-02-11 11:25:20 -05001334 rpc_prepare_reply_pages(req, args->pages, 0,
Chuck Leverd9c407b2010-12-14 14:55:50 +00001335 NFSACL_MAXPAGES << PAGE_SHIFT,
Trond Myklebust9ed5af262020-11-21 20:46:18 -05001336 ACL3_getaclres_sz - NFS3_pagepad_sz);
Trond Myklebust431f6eb2018-09-16 00:08:20 -04001337 req->rq_rcv_buf.flags |= XDRBUF_SPARSE_PAGES;
1338 }
Chuck Leverd9c407b2010-12-14 14:55:50 +00001339}
1340
Chuck Lever9f06c712010-12-14 14:59:18 +00001341static void nfs3_xdr_enc_setacl3args(struct rpc_rqst *req,
1342 struct xdr_stream *xdr,
Christoph Hellwigfcc85812017-05-08 10:01:49 +02001343 const void *data)
Chuck Leverd9c407b2010-12-14 14:55:50 +00001344{
Christoph Hellwigfcc85812017-05-08 10:01:49 +02001345 const struct nfs3_setaclargs *args = data;
Chuck Leverd9c407b2010-12-14 14:55:50 +00001346 unsigned int base;
1347 int error;
1348
Chuck Lever9f06c712010-12-14 14:59:18 +00001349 encode_nfs_fh3(xdr, NFS_FH(args->inode));
1350 encode_uint32(xdr, args->mask);
Chuck Leverd9c407b2010-12-14 14:55:50 +00001351
1352 base = req->rq_slen;
Chuck Leveree5dc7732011-01-21 03:05:18 +00001353 if (args->npages != 0)
1354 xdr_write_pages(xdr, args->pages, 0, args->len);
1355 else
Chuck Leverd683cc42015-05-26 11:53:52 -04001356 xdr_reserve_space(xdr, args->len);
Chuck Leveree5dc7732011-01-21 03:05:18 +00001357
Chuck Lever9f06c712010-12-14 14:59:18 +00001358 error = nfsacl_encode(xdr->buf, base, args->inode,
Chuck Leverd9c407b2010-12-14 14:55:50 +00001359 (args->mask & NFS_ACL) ?
1360 args->acl_access : NULL, 1, 0);
Trond Myklebust7fc38842012-10-15 11:51:21 -04001361 /* FIXME: this is just broken */
Chuck Leverd9c407b2010-12-14 14:55:50 +00001362 BUG_ON(error < 0);
Chuck Lever9f06c712010-12-14 14:59:18 +00001363 error = nfsacl_encode(xdr->buf, base + error, args->inode,
Chuck Leverd9c407b2010-12-14 14:55:50 +00001364 (args->mask & NFS_DFACL) ?
1365 args->acl_default : NULL, 1,
1366 NFS_ACL_DEFAULT);
1367 BUG_ON(error < 0);
Chuck Leverd9c407b2010-12-14 14:55:50 +00001368}
1369
Andreas Gruenbacherb7fa0552005-06-22 17:16:27 +00001370#endif /* CONFIG_NFS_V3_ACL */
1371
Linus Torvalds1da177e2005-04-16 15:20:36 -07001372/*
Chuck Leverb2cdd9c2010-12-14 14:56:52 +00001373 * NFSv3 XDR decode functions
1374 *
1375 * NFSv3 result types are defined in section 3.3 of RFC 1813:
1376 * "NFS Version 3 Protocol Specification".
Linus Torvalds1da177e2005-04-16 15:20:36 -07001377 */
1378
1379/*
Chuck Levere4f93232010-12-14 14:56:30 +00001380 * 3.3.1 GETATTR3res
1381 *
1382 * struct GETATTR3resok {
1383 * fattr3 obj_attributes;
1384 * };
1385 *
1386 * union GETATTR3res switch (nfsstat3 status) {
1387 * case NFS3_OK:
1388 * GETATTR3resok resok;
1389 * default:
1390 * void;
1391 * };
1392 */
Chuck Leverbf269552010-12-14 14:59:29 +00001393static int nfs3_xdr_dec_getattr3res(struct rpc_rqst *req,
1394 struct xdr_stream *xdr,
Christoph Hellwigfc016482017-05-08 15:09:02 +02001395 void *result)
Chuck Levere4f93232010-12-14 14:56:30 +00001396{
Chuck Levere4f93232010-12-14 14:56:30 +00001397 enum nfs_stat status;
1398 int error;
1399
Chuck Leverbf269552010-12-14 14:59:29 +00001400 error = decode_nfsstat3(xdr, &status);
Chuck Levere4f93232010-12-14 14:56:30 +00001401 if (unlikely(error))
1402 goto out;
1403 if (status != NFS3_OK)
1404 goto out_default;
Trond Myklebust264d9482019-04-24 17:46:46 -04001405 error = decode_fattr3(xdr, result, rpc_rqst_userns(req));
Chuck Levere4f93232010-12-14 14:56:30 +00001406out:
1407 return error;
1408out_default:
Bryan Schumaker5e7e5a02012-05-10 16:47:18 -04001409 return nfs3_stat_to_errno(status);
Chuck Levere4f93232010-12-14 14:56:30 +00001410}
1411
1412/*
Chuck Levere4f93232010-12-14 14:56:30 +00001413 * 3.3.2 SETATTR3res
1414 *
1415 * struct SETATTR3resok {
1416 * wcc_data obj_wcc;
1417 * };
1418 *
1419 * struct SETATTR3resfail {
1420 * wcc_data obj_wcc;
1421 * };
1422 *
1423 * union SETATTR3res switch (nfsstat3 status) {
1424 * case NFS3_OK:
1425 * SETATTR3resok resok;
1426 * default:
1427 * SETATTR3resfail resfail;
1428 * };
1429 */
Chuck Leverbf269552010-12-14 14:59:29 +00001430static int nfs3_xdr_dec_setattr3res(struct rpc_rqst *req,
1431 struct xdr_stream *xdr,
Christoph Hellwigfc016482017-05-08 15:09:02 +02001432 void *result)
Chuck Levere4f93232010-12-14 14:56:30 +00001433{
Chuck Levere4f93232010-12-14 14:56:30 +00001434 enum nfs_stat status;
1435 int error;
1436
Chuck Leverbf269552010-12-14 14:59:29 +00001437 error = decode_nfsstat3(xdr, &status);
Chuck Levere4f93232010-12-14 14:56:30 +00001438 if (unlikely(error))
1439 goto out;
Trond Myklebust264d9482019-04-24 17:46:46 -04001440 error = decode_wcc_data(xdr, result, rpc_rqst_userns(req));
Chuck Levere4f93232010-12-14 14:56:30 +00001441 if (unlikely(error))
1442 goto out;
1443 if (status != NFS3_OK)
1444 goto out_status;
1445out:
1446 return error;
1447out_status:
Bryan Schumaker5e7e5a02012-05-10 16:47:18 -04001448 return nfs3_stat_to_errno(status);
Chuck Levere4f93232010-12-14 14:56:30 +00001449}
1450
Linus Torvalds1da177e2005-04-16 15:20:36 -07001451/*
Chuck Levere4f93232010-12-14 14:56:30 +00001452 * 3.3.3 LOOKUP3res
1453 *
1454 * struct LOOKUP3resok {
1455 * nfs_fh3 object;
1456 * post_op_attr obj_attributes;
1457 * post_op_attr dir_attributes;
1458 * };
1459 *
1460 * struct LOOKUP3resfail {
1461 * post_op_attr dir_attributes;
1462 * };
1463 *
1464 * union LOOKUP3res switch (nfsstat3 status) {
1465 * case NFS3_OK:
1466 * LOOKUP3resok resok;
1467 * default:
1468 * LOOKUP3resfail resfail;
1469 * };
1470 */
Chuck Leverbf269552010-12-14 14:59:29 +00001471static int nfs3_xdr_dec_lookup3res(struct rpc_rqst *req,
1472 struct xdr_stream *xdr,
Christoph Hellwigfc016482017-05-08 15:09:02 +02001473 void *data)
Chuck Levere4f93232010-12-14 14:56:30 +00001474{
Trond Myklebust264d9482019-04-24 17:46:46 -04001475 struct user_namespace *userns = rpc_rqst_userns(req);
Christoph Hellwigfc016482017-05-08 15:09:02 +02001476 struct nfs3_diropres *result = data;
Chuck Levere4f93232010-12-14 14:56:30 +00001477 enum nfs_stat status;
1478 int error;
1479
Chuck Leverbf269552010-12-14 14:59:29 +00001480 error = decode_nfsstat3(xdr, &status);
Chuck Levere4f93232010-12-14 14:56:30 +00001481 if (unlikely(error))
1482 goto out;
1483 if (status != NFS3_OK)
1484 goto out_default;
Chuck Leverbf269552010-12-14 14:59:29 +00001485 error = decode_nfs_fh3(xdr, result->fh);
Chuck Levere4f93232010-12-14 14:56:30 +00001486 if (unlikely(error))
1487 goto out;
Trond Myklebust264d9482019-04-24 17:46:46 -04001488 error = decode_post_op_attr(xdr, result->fattr, userns);
Chuck Levere4f93232010-12-14 14:56:30 +00001489 if (unlikely(error))
1490 goto out;
Trond Myklebust264d9482019-04-24 17:46:46 -04001491 error = decode_post_op_attr(xdr, result->dir_attr, userns);
Chuck Levere4f93232010-12-14 14:56:30 +00001492out:
1493 return error;
1494out_default:
Trond Myklebust264d9482019-04-24 17:46:46 -04001495 error = decode_post_op_attr(xdr, result->dir_attr, userns);
Chuck Levere4f93232010-12-14 14:56:30 +00001496 if (unlikely(error))
1497 goto out;
Bryan Schumaker5e7e5a02012-05-10 16:47:18 -04001498 return nfs3_stat_to_errno(status);
Chuck Levere4f93232010-12-14 14:56:30 +00001499}
1500
1501/*
Chuck Levere4f93232010-12-14 14:56:30 +00001502 * 3.3.4 ACCESS3res
1503 *
1504 * struct ACCESS3resok {
1505 * post_op_attr obj_attributes;
1506 * uint32 access;
1507 * };
1508 *
1509 * struct ACCESS3resfail {
1510 * post_op_attr obj_attributes;
1511 * };
1512 *
1513 * union ACCESS3res switch (nfsstat3 status) {
1514 * case NFS3_OK:
1515 * ACCESS3resok resok;
1516 * default:
1517 * ACCESS3resfail resfail;
1518 * };
1519 */
Chuck Leverbf269552010-12-14 14:59:29 +00001520static int nfs3_xdr_dec_access3res(struct rpc_rqst *req,
1521 struct xdr_stream *xdr,
Christoph Hellwigfc016482017-05-08 15:09:02 +02001522 void *data)
Chuck Levere4f93232010-12-14 14:56:30 +00001523{
Christoph Hellwigfc016482017-05-08 15:09:02 +02001524 struct nfs3_accessres *result = data;
Chuck Levere4f93232010-12-14 14:56:30 +00001525 enum nfs_stat status;
1526 int error;
1527
Chuck Leverbf269552010-12-14 14:59:29 +00001528 error = decode_nfsstat3(xdr, &status);
Chuck Levere4f93232010-12-14 14:56:30 +00001529 if (unlikely(error))
1530 goto out;
Trond Myklebust264d9482019-04-24 17:46:46 -04001531 error = decode_post_op_attr(xdr, result->fattr, rpc_rqst_userns(req));
Chuck Levere4f93232010-12-14 14:56:30 +00001532 if (unlikely(error))
1533 goto out;
1534 if (status != NFS3_OK)
1535 goto out_default;
Chuck Leverbf269552010-12-14 14:59:29 +00001536 error = decode_uint32(xdr, &result->access);
Chuck Levere4f93232010-12-14 14:56:30 +00001537out:
1538 return error;
1539out_default:
Bryan Schumaker5e7e5a02012-05-10 16:47:18 -04001540 return nfs3_stat_to_errno(status);
Chuck Levere4f93232010-12-14 14:56:30 +00001541}
1542
1543/*
Chuck Levere4f93232010-12-14 14:56:30 +00001544 * 3.3.5 READLINK3res
1545 *
1546 * struct READLINK3resok {
1547 * post_op_attr symlink_attributes;
1548 * nfspath3 data;
1549 * };
1550 *
1551 * struct READLINK3resfail {
1552 * post_op_attr symlink_attributes;
1553 * };
1554 *
1555 * union READLINK3res switch (nfsstat3 status) {
1556 * case NFS3_OK:
1557 * READLINK3resok resok;
1558 * default:
1559 * READLINK3resfail resfail;
1560 * };
1561 */
Chuck Leverbf269552010-12-14 14:59:29 +00001562static int nfs3_xdr_dec_readlink3res(struct rpc_rqst *req,
1563 struct xdr_stream *xdr,
Christoph Hellwigfc016482017-05-08 15:09:02 +02001564 void *result)
Chuck Levere4f93232010-12-14 14:56:30 +00001565{
Chuck Levere4f93232010-12-14 14:56:30 +00001566 enum nfs_stat status;
1567 int error;
1568
Chuck Leverbf269552010-12-14 14:59:29 +00001569 error = decode_nfsstat3(xdr, &status);
Chuck Levere4f93232010-12-14 14:56:30 +00001570 if (unlikely(error))
1571 goto out;
Trond Myklebust264d9482019-04-24 17:46:46 -04001572 error = decode_post_op_attr(xdr, result, rpc_rqst_userns(req));
Chuck Levere4f93232010-12-14 14:56:30 +00001573 if (unlikely(error))
1574 goto out;
1575 if (status != NFS3_OK)
1576 goto out_default;
Chuck Leverbf269552010-12-14 14:59:29 +00001577 error = decode_nfspath3(xdr);
Chuck Levere4f93232010-12-14 14:56:30 +00001578out:
1579 return error;
1580out_default:
Bryan Schumaker5e7e5a02012-05-10 16:47:18 -04001581 return nfs3_stat_to_errno(status);
Chuck Levere4f93232010-12-14 14:56:30 +00001582}
1583
1584/*
Chuck Levere4f93232010-12-14 14:56:30 +00001585 * 3.3.6 READ3res
1586 *
1587 * struct READ3resok {
1588 * post_op_attr file_attributes;
1589 * count3 count;
1590 * bool eof;
1591 * opaque data<>;
1592 * };
1593 *
1594 * struct READ3resfail {
1595 * post_op_attr file_attributes;
1596 * };
1597 *
1598 * union READ3res switch (nfsstat3 status) {
1599 * case NFS3_OK:
1600 * READ3resok resok;
1601 * default:
1602 * READ3resfail resfail;
1603 * };
1604 */
1605static int decode_read3resok(struct xdr_stream *xdr,
Anna Schumaker9137bdf2014-05-06 09:12:25 -04001606 struct nfs_pgio_res *result)
Chuck Levere4f93232010-12-14 14:56:30 +00001607{
1608 u32 eof, count, ocount, recvd;
Chuck Levere4f93232010-12-14 14:56:30 +00001609 __be32 *p;
1610
1611 p = xdr_inline_decode(xdr, 4 + 4 + 4);
Chuck Levereb72f482019-02-11 11:24:21 -05001612 if (unlikely(!p))
1613 return -EIO;
Chuck Levere4f93232010-12-14 14:56:30 +00001614 count = be32_to_cpup(p++);
1615 eof = be32_to_cpup(p++);
1616 ocount = be32_to_cpup(p++);
1617 if (unlikely(ocount != count))
1618 goto out_mismatch;
Trond Myklebust64bd5772012-06-20 22:35:05 -04001619 recvd = xdr_read_pages(xdr, count);
Chuck Levere4f93232010-12-14 14:56:30 +00001620 if (unlikely(count > recvd))
1621 goto out_cheating;
Chuck Levere4f93232010-12-14 14:56:30 +00001622out:
Chuck Levere4f93232010-12-14 14:56:30 +00001623 result->eof = eof;
1624 result->count = count;
1625 return count;
1626out_mismatch:
1627 dprintk("NFS: READ count doesn't match length of opaque: "
1628 "count %u != ocount %u\n", count, ocount);
1629 return -EIO;
1630out_cheating:
1631 dprintk("NFS: server cheating in read result: "
1632 "count %u > recvd %u\n", count, recvd);
1633 count = recvd;
1634 eof = 0;
1635 goto out;
Chuck Levere4f93232010-12-14 14:56:30 +00001636}
1637
Chuck Leverbf269552010-12-14 14:59:29 +00001638static int nfs3_xdr_dec_read3res(struct rpc_rqst *req, struct xdr_stream *xdr,
Christoph Hellwigfc016482017-05-08 15:09:02 +02001639 void *data)
Chuck Levere4f93232010-12-14 14:56:30 +00001640{
Christoph Hellwigfc016482017-05-08 15:09:02 +02001641 struct nfs_pgio_res *result = data;
Trond Myklebust8d8928d2018-03-05 12:03:00 -05001642 unsigned int pos;
Chuck Levere4f93232010-12-14 14:56:30 +00001643 enum nfs_stat status;
1644 int error;
1645
Trond Myklebust8d8928d2018-03-05 12:03:00 -05001646 pos = xdr_stream_pos(xdr);
Chuck Leverbf269552010-12-14 14:59:29 +00001647 error = decode_nfsstat3(xdr, &status);
Chuck Levere4f93232010-12-14 14:56:30 +00001648 if (unlikely(error))
1649 goto out;
Trond Myklebust264d9482019-04-24 17:46:46 -04001650 error = decode_post_op_attr(xdr, result->fattr, rpc_rqst_userns(req));
Chuck Levere4f93232010-12-14 14:56:30 +00001651 if (unlikely(error))
1652 goto out;
Peng Taoaabff4d2014-08-27 10:47:14 +08001653 result->op_status = status;
Chuck Levere4f93232010-12-14 14:56:30 +00001654 if (status != NFS3_OK)
1655 goto out_status;
Trond Myklebust9ed5af262020-11-21 20:46:18 -05001656 result->replen = 3 + ((xdr_stream_pos(xdr) - pos) >> 2);
Chuck Leverbf269552010-12-14 14:59:29 +00001657 error = decode_read3resok(xdr, result);
Chuck Levere4f93232010-12-14 14:56:30 +00001658out:
1659 return error;
1660out_status:
Bryan Schumaker5e7e5a02012-05-10 16:47:18 -04001661 return nfs3_stat_to_errno(status);
Chuck Levere4f93232010-12-14 14:56:30 +00001662}
1663
1664/*
Chuck Levere4f93232010-12-14 14:56:30 +00001665 * 3.3.7 WRITE3res
1666 *
1667 * enum stable_how {
1668 * UNSTABLE = 0,
1669 * DATA_SYNC = 1,
1670 * FILE_SYNC = 2
1671 * };
1672 *
1673 * struct WRITE3resok {
1674 * wcc_data file_wcc;
1675 * count3 count;
1676 * stable_how committed;
1677 * writeverf3 verf;
1678 * };
1679 *
1680 * struct WRITE3resfail {
1681 * wcc_data file_wcc;
1682 * };
1683 *
1684 * union WRITE3res switch (nfsstat3 status) {
1685 * case NFS3_OK:
1686 * WRITE3resok resok;
1687 * default:
1688 * WRITE3resfail resfail;
1689 * };
1690 */
1691static int decode_write3resok(struct xdr_stream *xdr,
Anna Schumaker9137bdf2014-05-06 09:12:25 -04001692 struct nfs_pgio_res *result)
Chuck Levere4f93232010-12-14 14:56:30 +00001693{
1694 __be32 *p;
1695
Trond Myklebust2f2c63b2012-06-08 11:56:09 -04001696 p = xdr_inline_decode(xdr, 4 + 4);
Chuck Levereb72f482019-02-11 11:24:21 -05001697 if (unlikely(!p))
1698 return -EIO;
Chuck Levere4f93232010-12-14 14:56:30 +00001699 result->count = be32_to_cpup(p++);
1700 result->verf->committed = be32_to_cpup(p++);
1701 if (unlikely(result->verf->committed > NFS_FILE_SYNC))
1702 goto out_badvalue;
Trond Myklebust2f2c63b2012-06-08 11:56:09 -04001703 if (decode_writeverf3(xdr, &result->verf->verifier))
Chuck Levereb72f482019-02-11 11:24:21 -05001704 return -EIO;
Chuck Levere4f93232010-12-14 14:56:30 +00001705 return result->count;
1706out_badvalue:
1707 dprintk("NFS: bad stable_how value: %u\n", result->verf->committed);
1708 return -EIO;
Chuck Levere4f93232010-12-14 14:56:30 +00001709}
1710
Chuck Leverbf269552010-12-14 14:59:29 +00001711static int nfs3_xdr_dec_write3res(struct rpc_rqst *req, struct xdr_stream *xdr,
Christoph Hellwigfc016482017-05-08 15:09:02 +02001712 void *data)
Chuck Levere4f93232010-12-14 14:56:30 +00001713{
Christoph Hellwigfc016482017-05-08 15:09:02 +02001714 struct nfs_pgio_res *result = data;
Chuck Levere4f93232010-12-14 14:56:30 +00001715 enum nfs_stat status;
1716 int error;
1717
Chuck Leverbf269552010-12-14 14:59:29 +00001718 error = decode_nfsstat3(xdr, &status);
Chuck Levere4f93232010-12-14 14:56:30 +00001719 if (unlikely(error))
1720 goto out;
Trond Myklebust264d9482019-04-24 17:46:46 -04001721 error = decode_wcc_data(xdr, result->fattr, rpc_rqst_userns(req));
Chuck Levere4f93232010-12-14 14:56:30 +00001722 if (unlikely(error))
1723 goto out;
Peng Taoaabff4d2014-08-27 10:47:14 +08001724 result->op_status = status;
Chuck Levere4f93232010-12-14 14:56:30 +00001725 if (status != NFS3_OK)
1726 goto out_status;
Chuck Leverbf269552010-12-14 14:59:29 +00001727 error = decode_write3resok(xdr, result);
Chuck Levere4f93232010-12-14 14:56:30 +00001728out:
1729 return error;
1730out_status:
Bryan Schumaker5e7e5a02012-05-10 16:47:18 -04001731 return nfs3_stat_to_errno(status);
Chuck Levere4f93232010-12-14 14:56:30 +00001732}
1733
1734/*
Chuck Levere4f93232010-12-14 14:56:30 +00001735 * 3.3.8 CREATE3res
1736 *
1737 * struct CREATE3resok {
1738 * post_op_fh3 obj;
1739 * post_op_attr obj_attributes;
1740 * wcc_data dir_wcc;
1741 * };
1742 *
1743 * struct CREATE3resfail {
1744 * wcc_data dir_wcc;
1745 * };
1746 *
1747 * union CREATE3res switch (nfsstat3 status) {
1748 * case NFS3_OK:
1749 * CREATE3resok resok;
1750 * default:
1751 * CREATE3resfail resfail;
1752 * };
1753 */
1754static int decode_create3resok(struct xdr_stream *xdr,
Trond Myklebust264d9482019-04-24 17:46:46 -04001755 struct nfs3_diropres *result,
1756 struct user_namespace *userns)
Chuck Levere4f93232010-12-14 14:56:30 +00001757{
1758 int error;
1759
1760 error = decode_post_op_fh3(xdr, result->fh);
1761 if (unlikely(error))
1762 goto out;
Trond Myklebust264d9482019-04-24 17:46:46 -04001763 error = decode_post_op_attr(xdr, result->fattr, userns);
Chuck Levere4f93232010-12-14 14:56:30 +00001764 if (unlikely(error))
1765 goto out;
1766 /* The server isn't required to return a file handle.
1767 * If it didn't, force the client to perform a LOOKUP
1768 * to determine the correct file handle and attribute
1769 * values for the new object. */
1770 if (result->fh->size == 0)
1771 result->fattr->valid = 0;
Trond Myklebust264d9482019-04-24 17:46:46 -04001772 error = decode_wcc_data(xdr, result->dir_attr, userns);
Chuck Levere4f93232010-12-14 14:56:30 +00001773out:
1774 return error;
1775}
1776
Chuck Leverbf269552010-12-14 14:59:29 +00001777static int nfs3_xdr_dec_create3res(struct rpc_rqst *req,
1778 struct xdr_stream *xdr,
Christoph Hellwigfc016482017-05-08 15:09:02 +02001779 void *data)
Chuck Levere4f93232010-12-14 14:56:30 +00001780{
Trond Myklebust264d9482019-04-24 17:46:46 -04001781 struct user_namespace *userns = rpc_rqst_userns(req);
Christoph Hellwigfc016482017-05-08 15:09:02 +02001782 struct nfs3_diropres *result = data;
Chuck Levere4f93232010-12-14 14:56:30 +00001783 enum nfs_stat status;
1784 int error;
1785
Chuck Leverbf269552010-12-14 14:59:29 +00001786 error = decode_nfsstat3(xdr, &status);
Chuck Levere4f93232010-12-14 14:56:30 +00001787 if (unlikely(error))
1788 goto out;
1789 if (status != NFS3_OK)
1790 goto out_default;
Trond Myklebust264d9482019-04-24 17:46:46 -04001791 error = decode_create3resok(xdr, result, userns);
Chuck Levere4f93232010-12-14 14:56:30 +00001792out:
1793 return error;
1794out_default:
Trond Myklebust264d9482019-04-24 17:46:46 -04001795 error = decode_wcc_data(xdr, result->dir_attr, userns);
Chuck Levere4f93232010-12-14 14:56:30 +00001796 if (unlikely(error))
1797 goto out;
Bryan Schumaker5e7e5a02012-05-10 16:47:18 -04001798 return nfs3_stat_to_errno(status);
Chuck Levere4f93232010-12-14 14:56:30 +00001799}
1800
1801/*
1802 * 3.3.12 REMOVE3res
1803 *
1804 * struct REMOVE3resok {
1805 * wcc_data dir_wcc;
1806 * };
1807 *
1808 * struct REMOVE3resfail {
1809 * wcc_data dir_wcc;
1810 * };
1811 *
1812 * union REMOVE3res switch (nfsstat3 status) {
1813 * case NFS3_OK:
1814 * REMOVE3resok resok;
1815 * default:
1816 * REMOVE3resfail resfail;
1817 * };
1818 */
Chuck Leverbf269552010-12-14 14:59:29 +00001819static int nfs3_xdr_dec_remove3res(struct rpc_rqst *req,
1820 struct xdr_stream *xdr,
Christoph Hellwigfc016482017-05-08 15:09:02 +02001821 void *data)
Chuck Levere4f93232010-12-14 14:56:30 +00001822{
Christoph Hellwigfc016482017-05-08 15:09:02 +02001823 struct nfs_removeres *result = data;
Chuck Levere4f93232010-12-14 14:56:30 +00001824 enum nfs_stat status;
1825 int error;
1826
Chuck Leverbf269552010-12-14 14:59:29 +00001827 error = decode_nfsstat3(xdr, &status);
Chuck Levere4f93232010-12-14 14:56:30 +00001828 if (unlikely(error))
1829 goto out;
Trond Myklebust264d9482019-04-24 17:46:46 -04001830 error = decode_wcc_data(xdr, result->dir_attr, rpc_rqst_userns(req));
Chuck Levere4f93232010-12-14 14:56:30 +00001831 if (unlikely(error))
1832 goto out;
1833 if (status != NFS3_OK)
1834 goto out_status;
1835out:
1836 return error;
1837out_status:
Bryan Schumaker5e7e5a02012-05-10 16:47:18 -04001838 return nfs3_stat_to_errno(status);
Chuck Levere4f93232010-12-14 14:56:30 +00001839}
1840
1841/*
Chuck Levere4f93232010-12-14 14:56:30 +00001842 * 3.3.14 RENAME3res
1843 *
1844 * struct RENAME3resok {
1845 * wcc_data fromdir_wcc;
1846 * wcc_data todir_wcc;
1847 * };
1848 *
1849 * struct RENAME3resfail {
1850 * wcc_data fromdir_wcc;
1851 * wcc_data todir_wcc;
1852 * };
1853 *
1854 * union RENAME3res switch (nfsstat3 status) {
1855 * case NFS3_OK:
1856 * RENAME3resok resok;
1857 * default:
1858 * RENAME3resfail resfail;
1859 * };
1860 */
Chuck Leverbf269552010-12-14 14:59:29 +00001861static int nfs3_xdr_dec_rename3res(struct rpc_rqst *req,
1862 struct xdr_stream *xdr,
Christoph Hellwigfc016482017-05-08 15:09:02 +02001863 void *data)
Chuck Levere4f93232010-12-14 14:56:30 +00001864{
Trond Myklebust264d9482019-04-24 17:46:46 -04001865 struct user_namespace *userns = rpc_rqst_userns(req);
Christoph Hellwigfc016482017-05-08 15:09:02 +02001866 struct nfs_renameres *result = data;
Chuck Levere4f93232010-12-14 14:56:30 +00001867 enum nfs_stat status;
1868 int error;
1869
Chuck Leverbf269552010-12-14 14:59:29 +00001870 error = decode_nfsstat3(xdr, &status);
Chuck Levere4f93232010-12-14 14:56:30 +00001871 if (unlikely(error))
1872 goto out;
Trond Myklebust264d9482019-04-24 17:46:46 -04001873 error = decode_wcc_data(xdr, result->old_fattr, userns);
Chuck Levere4f93232010-12-14 14:56:30 +00001874 if (unlikely(error))
1875 goto out;
Trond Myklebust264d9482019-04-24 17:46:46 -04001876 error = decode_wcc_data(xdr, result->new_fattr, userns);
Chuck Levere4f93232010-12-14 14:56:30 +00001877 if (unlikely(error))
1878 goto out;
1879 if (status != NFS3_OK)
1880 goto out_status;
1881out:
1882 return error;
1883out_status:
Bryan Schumaker5e7e5a02012-05-10 16:47:18 -04001884 return nfs3_stat_to_errno(status);
Chuck Levere4f93232010-12-14 14:56:30 +00001885}
1886
1887/*
Chuck Levere4f93232010-12-14 14:56:30 +00001888 * 3.3.15 LINK3res
1889 *
1890 * struct LINK3resok {
1891 * post_op_attr file_attributes;
1892 * wcc_data linkdir_wcc;
1893 * };
1894 *
1895 * struct LINK3resfail {
1896 * post_op_attr file_attributes;
1897 * wcc_data linkdir_wcc;
1898 * };
1899 *
1900 * union LINK3res switch (nfsstat3 status) {
1901 * case NFS3_OK:
1902 * LINK3resok resok;
1903 * default:
1904 * LINK3resfail resfail;
1905 * };
1906 */
Chuck Leverbf269552010-12-14 14:59:29 +00001907static int nfs3_xdr_dec_link3res(struct rpc_rqst *req, struct xdr_stream *xdr,
Christoph Hellwigfc016482017-05-08 15:09:02 +02001908 void *data)
Chuck Levere4f93232010-12-14 14:56:30 +00001909{
Trond Myklebust264d9482019-04-24 17:46:46 -04001910 struct user_namespace *userns = rpc_rqst_userns(req);
Christoph Hellwigfc016482017-05-08 15:09:02 +02001911 struct nfs3_linkres *result = data;
Chuck Levere4f93232010-12-14 14:56:30 +00001912 enum nfs_stat status;
1913 int error;
1914
Chuck Leverbf269552010-12-14 14:59:29 +00001915 error = decode_nfsstat3(xdr, &status);
Chuck Levere4f93232010-12-14 14:56:30 +00001916 if (unlikely(error))
1917 goto out;
Trond Myklebust264d9482019-04-24 17:46:46 -04001918 error = decode_post_op_attr(xdr, result->fattr, userns);
Chuck Levere4f93232010-12-14 14:56:30 +00001919 if (unlikely(error))
1920 goto out;
Trond Myklebust264d9482019-04-24 17:46:46 -04001921 error = decode_wcc_data(xdr, result->dir_attr, userns);
Chuck Levere4f93232010-12-14 14:56:30 +00001922 if (unlikely(error))
1923 goto out;
1924 if (status != NFS3_OK)
1925 goto out_status;
1926out:
1927 return error;
1928out_status:
Bryan Schumaker5e7e5a02012-05-10 16:47:18 -04001929 return nfs3_stat_to_errno(status);
Chuck Levere4f93232010-12-14 14:56:30 +00001930}
1931
1932/**
1933 * nfs3_decode_dirent - Decode a single NFSv3 directory entry stored in
1934 * the local page cache
1935 * @xdr: XDR stream where entry resides
1936 * @entry: buffer to fill in with entry data
Chuck Levere4f93232010-12-14 14:56:30 +00001937 * @plus: boolean indicating whether this should be a readdirplus entry
1938 *
Chuck Lever573c4e12010-12-14 14:58:11 +00001939 * Returns zero if successful, otherwise a negative errno value is
1940 * returned.
Chuck Levere4f93232010-12-14 14:56:30 +00001941 *
1942 * This function is not invoked during READDIR reply decoding, but
1943 * rather whenever an application invokes the getdents(2) system call
1944 * on a directory already in our cache.
1945 *
1946 * 3.3.16 entry3
1947 *
1948 * struct entry3 {
1949 * fileid3 fileid;
1950 * filename3 name;
1951 * cookie3 cookie;
1952 * fhandle3 filehandle;
1953 * post_op_attr3 attributes;
1954 * entry3 *nextentry;
1955 * };
1956 *
1957 * 3.3.17 entryplus3
1958 * struct entryplus3 {
1959 * fileid3 fileid;
1960 * filename3 name;
1961 * cookie3 cookie;
1962 * post_op_attr name_attributes;
1963 * post_op_fh3 name_handle;
1964 * entryplus3 *nextentry;
1965 * };
1966 */
Chuck Lever573c4e12010-12-14 14:58:11 +00001967int nfs3_decode_dirent(struct xdr_stream *xdr, struct nfs_entry *entry,
Benjamin Coddingtona7a3b1e2017-06-20 08:33:44 -04001968 bool plus)
Chuck Levere4f93232010-12-14 14:56:30 +00001969{
Trond Myklebust264d9482019-04-24 17:46:46 -04001970 struct user_namespace *userns = rpc_userns(entry->server->client);
Chuck Levere4f93232010-12-14 14:56:30 +00001971 __be32 *p;
1972 int error;
Frank Sorenson98de9ce2018-04-02 16:12:45 -05001973 u64 new_cookie;
Chuck Levere4f93232010-12-14 14:56:30 +00001974
1975 p = xdr_inline_decode(xdr, 4);
Chuck Levereb72f482019-02-11 11:24:21 -05001976 if (unlikely(!p))
1977 return -EAGAIN;
Chuck Levere4f93232010-12-14 14:56:30 +00001978 if (*p == xdr_zero) {
1979 p = xdr_inline_decode(xdr, 4);
Chuck Levereb72f482019-02-11 11:24:21 -05001980 if (unlikely(!p))
1981 return -EAGAIN;
Chuck Levere4f93232010-12-14 14:56:30 +00001982 if (*p == xdr_zero)
Chuck Lever573c4e12010-12-14 14:58:11 +00001983 return -EAGAIN;
Chuck Levere4f93232010-12-14 14:56:30 +00001984 entry->eof = 1;
Chuck Lever573c4e12010-12-14 14:58:11 +00001985 return -EBADCOOKIE;
Chuck Levere4f93232010-12-14 14:56:30 +00001986 }
1987
1988 error = decode_fileid3(xdr, &entry->ino);
1989 if (unlikely(error))
Trond Myklebust64cfca82022-02-24 10:59:37 -05001990 return -EAGAIN;
Chuck Levere4f93232010-12-14 14:56:30 +00001991
1992 error = decode_inline_filename3(xdr, &entry->name, &entry->len);
1993 if (unlikely(error))
Benjamin Coddingtonf67b55b2023-08-22 14:22:38 -04001994 return error == -ENAMETOOLONG ? -ENAMETOOLONG : -EAGAIN;
Chuck Levere4f93232010-12-14 14:56:30 +00001995
Frank Sorenson98de9ce2018-04-02 16:12:45 -05001996 error = decode_cookie3(xdr, &new_cookie);
Chuck Levere4f93232010-12-14 14:56:30 +00001997 if (unlikely(error))
Trond Myklebust64cfca82022-02-24 10:59:37 -05001998 return -EAGAIN;
Chuck Levere4f93232010-12-14 14:56:30 +00001999
2000 entry->d_type = DT_UNKNOWN;
2001
2002 if (plus) {
2003 entry->fattr->valid = 0;
Trond Myklebust264d9482019-04-24 17:46:46 -04002004 error = decode_post_op_attr(xdr, entry->fattr, userns);
Chuck Levere4f93232010-12-14 14:56:30 +00002005 if (unlikely(error))
Trond Myklebust64cfca82022-02-24 10:59:37 -05002006 return -EAGAIN;
Chuck Levere4f93232010-12-14 14:56:30 +00002007 if (entry->fattr->valid & NFS_ATTR_FATTR_V3)
2008 entry->d_type = nfs_umode_to_dtype(entry->fattr->mode);
2009
Trond Myklebust1ae04b22015-02-23 16:15:00 -05002010 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
Chuck Levere4f93232010-12-14 14:56:30 +00002015 /* In fact, a post_op_fh3: */
2016 p = xdr_inline_decode(xdr, 4);
Chuck Levereb72f482019-02-11 11:24:21 -05002017 if (unlikely(!p))
2018 return -EAGAIN;
Chuck Levere4f93232010-12-14 14:56:30 +00002019 if (*p != xdr_zero) {
2020 error = decode_nfs_fh3(xdr, entry->fh);
Trond Myklebust64cfca82022-02-24 10:59:37 -05002021 if (unlikely(error))
2022 return -EAGAIN;
Chuck Levere4f93232010-12-14 14:56:30 +00002023 } else
2024 zero_nfs_fh3(entry->fh);
2025 }
2026
Frank Sorenson98de9ce2018-04-02 16:12:45 -05002027 entry->cookie = new_cookie;
2028
Chuck Lever573c4e12010-12-14 14:58:11 +00002029 return 0;
Chuck Levere4f93232010-12-14 14:56:30 +00002030}
2031
2032/*
2033 * 3.3.16 READDIR3res
2034 *
2035 * struct dirlist3 {
2036 * entry3 *entries;
2037 * bool eof;
2038 * };
2039 *
2040 * struct READDIR3resok {
2041 * post_op_attr dir_attributes;
2042 * cookieverf3 cookieverf;
2043 * dirlist3 reply;
2044 * };
2045 *
2046 * struct READDIR3resfail {
2047 * post_op_attr dir_attributes;
2048 * };
2049 *
2050 * union READDIR3res switch (nfsstat3 status) {
2051 * case NFS3_OK:
2052 * READDIR3resok resok;
2053 * default:
2054 * READDIR3resfail resfail;
2055 * };
2056 *
2057 * Read the directory contents into the page cache, but otherwise
2058 * don't touch them. The actual decoding is done by nfs3_decode_entry()
2059 * during subsequent nfs_readdir() calls.
2060 */
2061static int decode_dirlist3(struct xdr_stream *xdr)
2062{
Trond Myklebust64bd5772012-06-20 22:35:05 -04002063 return xdr_read_pages(xdr, xdr->buf->page_len);
Chuck Levere4f93232010-12-14 14:56:30 +00002064}
2065
2066static int decode_readdir3resok(struct xdr_stream *xdr,
Trond Myklebust264d9482019-04-24 17:46:46 -04002067 struct nfs3_readdirres *result,
2068 struct user_namespace *userns)
Chuck Levere4f93232010-12-14 14:56:30 +00002069{
2070 int error;
2071
Trond Myklebust264d9482019-04-24 17:46:46 -04002072 error = decode_post_op_attr(xdr, result->dir_attr, userns);
Chuck Levere4f93232010-12-14 14:56:30 +00002073 if (unlikely(error))
2074 goto out;
2075 /* XXX: do we need to check if result->verf != NULL ? */
2076 error = decode_cookieverf3(xdr, result->verf);
2077 if (unlikely(error))
2078 goto out;
2079 error = decode_dirlist3(xdr);
2080out:
2081 return error;
2082}
2083
Chuck Leverbf269552010-12-14 14:59:29 +00002084static int nfs3_xdr_dec_readdir3res(struct rpc_rqst *req,
2085 struct xdr_stream *xdr,
Christoph Hellwigfc016482017-05-08 15:09:02 +02002086 void *data)
Chuck Levere4f93232010-12-14 14:56:30 +00002087{
Christoph Hellwigfc016482017-05-08 15:09:02 +02002088 struct nfs3_readdirres *result = data;
Chuck Levere4f93232010-12-14 14:56:30 +00002089 enum nfs_stat status;
2090 int error;
2091
Chuck Leverbf269552010-12-14 14:59:29 +00002092 error = decode_nfsstat3(xdr, &status);
Chuck Levere4f93232010-12-14 14:56:30 +00002093 if (unlikely(error))
2094 goto out;
2095 if (status != NFS3_OK)
2096 goto out_default;
Trond Myklebust264d9482019-04-24 17:46:46 -04002097 error = decode_readdir3resok(xdr, result, rpc_rqst_userns(req));
Chuck Levere4f93232010-12-14 14:56:30 +00002098out:
2099 return error;
2100out_default:
Trond Myklebust264d9482019-04-24 17:46:46 -04002101 error = decode_post_op_attr(xdr, result->dir_attr, rpc_rqst_userns(req));
Chuck Levere4f93232010-12-14 14:56:30 +00002102 if (unlikely(error))
2103 goto out;
Bryan Schumaker5e7e5a02012-05-10 16:47:18 -04002104 return nfs3_stat_to_errno(status);
Chuck Levere4f93232010-12-14 14:56:30 +00002105}
2106
2107/*
Chuck Levere4f93232010-12-14 14:56:30 +00002108 * 3.3.18 FSSTAT3res
2109 *
2110 * struct FSSTAT3resok {
2111 * post_op_attr obj_attributes;
2112 * size3 tbytes;
2113 * size3 fbytes;
2114 * size3 abytes;
2115 * size3 tfiles;
2116 * size3 ffiles;
2117 * size3 afiles;
2118 * uint32 invarsec;
2119 * };
2120 *
2121 * struct FSSTAT3resfail {
2122 * post_op_attr obj_attributes;
2123 * };
2124 *
2125 * union FSSTAT3res switch (nfsstat3 status) {
2126 * case NFS3_OK:
2127 * FSSTAT3resok resok;
2128 * default:
2129 * FSSTAT3resfail resfail;
2130 * };
2131 */
2132static int decode_fsstat3resok(struct xdr_stream *xdr,
2133 struct nfs_fsstat *result)
2134{
2135 __be32 *p;
2136
2137 p = xdr_inline_decode(xdr, 8 * 6 + 4);
Chuck Levereb72f482019-02-11 11:24:21 -05002138 if (unlikely(!p))
2139 return -EIO;
Chuck Levere4f93232010-12-14 14:56:30 +00002140 p = xdr_decode_size3(p, &result->tbytes);
2141 p = xdr_decode_size3(p, &result->fbytes);
2142 p = xdr_decode_size3(p, &result->abytes);
2143 p = xdr_decode_size3(p, &result->tfiles);
2144 p = xdr_decode_size3(p, &result->ffiles);
2145 xdr_decode_size3(p, &result->afiles);
2146 /* ignore invarsec */
2147 return 0;
Chuck Levere4f93232010-12-14 14:56:30 +00002148}
2149
Chuck Leverbf269552010-12-14 14:59:29 +00002150static int nfs3_xdr_dec_fsstat3res(struct rpc_rqst *req,
2151 struct xdr_stream *xdr,
Christoph Hellwigfc016482017-05-08 15:09:02 +02002152 void *data)
Chuck Levere4f93232010-12-14 14:56:30 +00002153{
Christoph Hellwigfc016482017-05-08 15:09:02 +02002154 struct nfs_fsstat *result = data;
Chuck Levere4f93232010-12-14 14:56:30 +00002155 enum nfs_stat status;
2156 int error;
2157
Chuck Leverbf269552010-12-14 14:59:29 +00002158 error = decode_nfsstat3(xdr, &status);
Chuck Levere4f93232010-12-14 14:56:30 +00002159 if (unlikely(error))
2160 goto out;
Trond Myklebust264d9482019-04-24 17:46:46 -04002161 error = decode_post_op_attr(xdr, result->fattr, rpc_rqst_userns(req));
Chuck Levere4f93232010-12-14 14:56:30 +00002162 if (unlikely(error))
2163 goto out;
2164 if (status != NFS3_OK)
2165 goto out_status;
Chuck Leverbf269552010-12-14 14:59:29 +00002166 error = decode_fsstat3resok(xdr, result);
Chuck Levere4f93232010-12-14 14:56:30 +00002167out:
2168 return error;
2169out_status:
Bryan Schumaker5e7e5a02012-05-10 16:47:18 -04002170 return nfs3_stat_to_errno(status);
Chuck Levere4f93232010-12-14 14:56:30 +00002171}
2172
2173/*
Chuck Levere4f93232010-12-14 14:56:30 +00002174 * 3.3.19 FSINFO3res
2175 *
2176 * struct FSINFO3resok {
2177 * post_op_attr obj_attributes;
2178 * uint32 rtmax;
2179 * uint32 rtpref;
2180 * uint32 rtmult;
2181 * uint32 wtmax;
2182 * uint32 wtpref;
2183 * uint32 wtmult;
2184 * uint32 dtpref;
2185 * size3 maxfilesize;
2186 * nfstime3 time_delta;
2187 * uint32 properties;
2188 * };
2189 *
2190 * struct FSINFO3resfail {
2191 * post_op_attr obj_attributes;
2192 * };
2193 *
2194 * union FSINFO3res switch (nfsstat3 status) {
2195 * case NFS3_OK:
2196 * FSINFO3resok resok;
2197 * default:
2198 * FSINFO3resfail resfail;
2199 * };
2200 */
2201static int decode_fsinfo3resok(struct xdr_stream *xdr,
2202 struct nfs_fsinfo *result)
2203{
2204 __be32 *p;
2205
2206 p = xdr_inline_decode(xdr, 4 * 7 + 8 + 8 + 4);
Chuck Levereb72f482019-02-11 11:24:21 -05002207 if (unlikely(!p))
2208 return -EIO;
Chuck Levere4f93232010-12-14 14:56:30 +00002209 result->rtmax = be32_to_cpup(p++);
2210 result->rtpref = be32_to_cpup(p++);
2211 result->rtmult = be32_to_cpup(p++);
2212 result->wtmax = be32_to_cpup(p++);
2213 result->wtpref = be32_to_cpup(p++);
2214 result->wtmult = be32_to_cpup(p++);
2215 result->dtpref = be32_to_cpup(p++);
2216 p = xdr_decode_size3(p, &result->maxfilesize);
Chuck Leverf6048702010-12-14 14:57:02 +00002217 xdr_decode_nfstime3(p, &result->time_delta);
Chuck Levere4f93232010-12-14 14:56:30 +00002218
2219 /* ignore properties */
2220 result->lease_time = 0;
Trond Myklebusteea41332021-09-26 14:05:04 -04002221 result->change_attr_type = NFS4_CHANGE_TYPE_IS_UNDEFINED;
Trond Myklebustb622ffe2022-02-22 18:20:38 -05002222 result->xattr_support = 0;
Chuck Levere4f93232010-12-14 14:56:30 +00002223 return 0;
Chuck Levere4f93232010-12-14 14:56:30 +00002224}
2225
Chuck Leverbf269552010-12-14 14:59:29 +00002226static int nfs3_xdr_dec_fsinfo3res(struct rpc_rqst *req,
2227 struct xdr_stream *xdr,
Christoph Hellwigfc016482017-05-08 15:09:02 +02002228 void *data)
Chuck Levere4f93232010-12-14 14:56:30 +00002229{
Christoph Hellwigfc016482017-05-08 15:09:02 +02002230 struct nfs_fsinfo *result = data;
Chuck Levere4f93232010-12-14 14:56:30 +00002231 enum nfs_stat status;
2232 int error;
2233
Chuck Leverbf269552010-12-14 14:59:29 +00002234 error = decode_nfsstat3(xdr, &status);
Chuck Levere4f93232010-12-14 14:56:30 +00002235 if (unlikely(error))
2236 goto out;
Trond Myklebust264d9482019-04-24 17:46:46 -04002237 error = decode_post_op_attr(xdr, result->fattr, rpc_rqst_userns(req));
Chuck Levere4f93232010-12-14 14:56:30 +00002238 if (unlikely(error))
2239 goto out;
2240 if (status != NFS3_OK)
2241 goto out_status;
Chuck Leverbf269552010-12-14 14:59:29 +00002242 error = decode_fsinfo3resok(xdr, result);
Chuck Levere4f93232010-12-14 14:56:30 +00002243out:
2244 return error;
2245out_status:
Bryan Schumaker5e7e5a02012-05-10 16:47:18 -04002246 return nfs3_stat_to_errno(status);
Chuck Levere4f93232010-12-14 14:56:30 +00002247}
2248
2249/*
Chuck Levere4f93232010-12-14 14:56:30 +00002250 * 3.3.20 PATHCONF3res
2251 *
2252 * struct PATHCONF3resok {
2253 * post_op_attr obj_attributes;
2254 * uint32 linkmax;
2255 * uint32 name_max;
2256 * bool no_trunc;
2257 * bool chown_restricted;
2258 * bool case_insensitive;
2259 * bool case_preserving;
2260 * };
2261 *
2262 * struct PATHCONF3resfail {
2263 * post_op_attr obj_attributes;
2264 * };
2265 *
2266 * union PATHCONF3res switch (nfsstat3 status) {
2267 * case NFS3_OK:
2268 * PATHCONF3resok resok;
2269 * default:
2270 * PATHCONF3resfail resfail;
2271 * };
2272 */
2273static int decode_pathconf3resok(struct xdr_stream *xdr,
2274 struct nfs_pathconf *result)
2275{
2276 __be32 *p;
2277
2278 p = xdr_inline_decode(xdr, 4 * 6);
Chuck Levereb72f482019-02-11 11:24:21 -05002279 if (unlikely(!p))
2280 return -EIO;
Chuck Levere4f93232010-12-14 14:56:30 +00002281 result->max_link = be32_to_cpup(p++);
2282 result->max_namelen = be32_to_cpup(p);
2283 /* ignore remaining fields */
2284 return 0;
Chuck Levere4f93232010-12-14 14:56:30 +00002285}
2286
Chuck Leverbf269552010-12-14 14:59:29 +00002287static int nfs3_xdr_dec_pathconf3res(struct rpc_rqst *req,
2288 struct xdr_stream *xdr,
Christoph Hellwigfc016482017-05-08 15:09:02 +02002289 void *data)
Chuck Levere4f93232010-12-14 14:56:30 +00002290{
Christoph Hellwigfc016482017-05-08 15:09:02 +02002291 struct nfs_pathconf *result = data;
Chuck Levere4f93232010-12-14 14:56:30 +00002292 enum nfs_stat status;
2293 int error;
2294
Chuck Leverbf269552010-12-14 14:59:29 +00002295 error = decode_nfsstat3(xdr, &status);
Chuck Levere4f93232010-12-14 14:56:30 +00002296 if (unlikely(error))
2297 goto out;
Trond Myklebust264d9482019-04-24 17:46:46 -04002298 error = decode_post_op_attr(xdr, result->fattr, rpc_rqst_userns(req));
Chuck Levere4f93232010-12-14 14:56:30 +00002299 if (unlikely(error))
2300 goto out;
2301 if (status != NFS3_OK)
2302 goto out_status;
Chuck Leverbf269552010-12-14 14:59:29 +00002303 error = decode_pathconf3resok(xdr, result);
Chuck Levere4f93232010-12-14 14:56:30 +00002304out:
2305 return error;
2306out_status:
Bryan Schumaker5e7e5a02012-05-10 16:47:18 -04002307 return nfs3_stat_to_errno(status);
Chuck Levere4f93232010-12-14 14:56:30 +00002308}
2309
2310/*
Chuck Levere4f93232010-12-14 14:56:30 +00002311 * 3.3.21 COMMIT3res
2312 *
2313 * struct COMMIT3resok {
2314 * wcc_data file_wcc;
2315 * writeverf3 verf;
2316 * };
2317 *
2318 * struct COMMIT3resfail {
2319 * wcc_data file_wcc;
2320 * };
2321 *
2322 * union COMMIT3res switch (nfsstat3 status) {
2323 * case NFS3_OK:
2324 * COMMIT3resok resok;
2325 * default:
2326 * COMMIT3resfail resfail;
2327 * };
2328 */
Chuck Leverbf269552010-12-14 14:59:29 +00002329static int nfs3_xdr_dec_commit3res(struct rpc_rqst *req,
2330 struct xdr_stream *xdr,
Christoph Hellwigfc016482017-05-08 15:09:02 +02002331 void *data)
Chuck Levere4f93232010-12-14 14:56:30 +00002332{
Christoph Hellwigfc016482017-05-08 15:09:02 +02002333 struct nfs_commitres *result = data;
Trond Myklebust221203c2020-01-06 15:25:04 -05002334 struct nfs_writeverf *verf = result->verf;
Chuck Levere4f93232010-12-14 14:56:30 +00002335 enum nfs_stat status;
2336 int error;
2337
Chuck Leverbf269552010-12-14 14:59:29 +00002338 error = decode_nfsstat3(xdr, &status);
Chuck Levere4f93232010-12-14 14:56:30 +00002339 if (unlikely(error))
2340 goto out;
Trond Myklebust264d9482019-04-24 17:46:46 -04002341 error = decode_wcc_data(xdr, result->fattr, rpc_rqst_userns(req));
Chuck Levere4f93232010-12-14 14:56:30 +00002342 if (unlikely(error))
2343 goto out;
Peng Taoaabff4d2014-08-27 10:47:14 +08002344 result->op_status = status;
Chuck Levere4f93232010-12-14 14:56:30 +00002345 if (status != NFS3_OK)
2346 goto out_status;
Trond Myklebust221203c2020-01-06 15:25:04 -05002347 error = decode_writeverf3(xdr, &verf->verifier);
2348 if (!error)
2349 verf->committed = NFS_FILE_SYNC;
Chuck Levere4f93232010-12-14 14:56:30 +00002350out:
2351 return error;
2352out_status:
Bryan Schumaker5e7e5a02012-05-10 16:47:18 -04002353 return nfs3_stat_to_errno(status);
Chuck Levere4f93232010-12-14 14:56:30 +00002354}
2355
Andreas Gruenbacherb7fa0552005-06-22 17:16:27 +00002356#ifdef CONFIG_NFS_V3_ACL
Andreas Gruenbacherb7fa0552005-06-22 17:16:27 +00002357
Chuck Levere4f93232010-12-14 14:56:30 +00002358static inline int decode_getacl3resok(struct xdr_stream *xdr,
Trond Myklebust264d9482019-04-24 17:46:46 -04002359 struct nfs3_getaclres *result,
2360 struct user_namespace *userns)
Chuck Levere4f93232010-12-14 14:56:30 +00002361{
2362 struct posix_acl **acl;
2363 unsigned int *aclcnt;
2364 size_t hdrlen;
2365 int error;
2366
Trond Myklebust264d9482019-04-24 17:46:46 -04002367 error = decode_post_op_attr(xdr, result->fattr, userns);
Chuck Levere4f93232010-12-14 14:56:30 +00002368 if (unlikely(error))
2369 goto out;
2370 error = decode_uint32(xdr, &result->mask);
2371 if (unlikely(error))
2372 goto out;
2373 error = -EINVAL;
2374 if (result->mask & ~(NFS_ACL|NFS_ACLCNT|NFS_DFACL|NFS_DFACLCNT))
2375 goto out;
2376
Trond Myklebust1aecca32012-06-21 11:41:29 -04002377 hdrlen = xdr_stream_pos(xdr);
Chuck Levere4f93232010-12-14 14:56:30 +00002378
2379 acl = NULL;
2380 if (result->mask & NFS_ACL)
2381 acl = &result->acl_access;
2382 aclcnt = NULL;
2383 if (result->mask & NFS_ACLCNT)
2384 aclcnt = &result->acl_access_count;
2385 error = nfsacl_decode(xdr->buf, hdrlen, aclcnt, acl);
2386 if (unlikely(error <= 0))
2387 goto out;
2388
2389 acl = NULL;
2390 if (result->mask & NFS_DFACL)
2391 acl = &result->acl_default;
2392 aclcnt = NULL;
2393 if (result->mask & NFS_DFACLCNT)
2394 aclcnt = &result->acl_default_count;
2395 error = nfsacl_decode(xdr->buf, hdrlen + error, aclcnt, acl);
2396 if (unlikely(error <= 0))
2397 return error;
2398 error = 0;
2399out:
2400 return error;
2401}
2402
Chuck Leverbf269552010-12-14 14:59:29 +00002403static int nfs3_xdr_dec_getacl3res(struct rpc_rqst *req,
2404 struct xdr_stream *xdr,
Christoph Hellwigfc016482017-05-08 15:09:02 +02002405 void *result)
Chuck Levere4f93232010-12-14 14:56:30 +00002406{
Chuck Levere4f93232010-12-14 14:56:30 +00002407 enum nfs_stat status;
2408 int error;
2409
Chuck Leverbf269552010-12-14 14:59:29 +00002410 error = decode_nfsstat3(xdr, &status);
Chuck Levere4f93232010-12-14 14:56:30 +00002411 if (unlikely(error))
2412 goto out;
2413 if (status != NFS3_OK)
2414 goto out_default;
Trond Myklebust264d9482019-04-24 17:46:46 -04002415 error = decode_getacl3resok(xdr, result, rpc_rqst_userns(req));
Chuck Levere4f93232010-12-14 14:56:30 +00002416out:
2417 return error;
2418out_default:
Bryan Schumaker5e7e5a02012-05-10 16:47:18 -04002419 return nfs3_stat_to_errno(status);
Chuck Levere4f93232010-12-14 14:56:30 +00002420}
2421
Chuck Leverbf269552010-12-14 14:59:29 +00002422static int nfs3_xdr_dec_setacl3res(struct rpc_rqst *req,
2423 struct xdr_stream *xdr,
Christoph Hellwigfc016482017-05-08 15:09:02 +02002424 void *result)
Chuck Levere4f93232010-12-14 14:56:30 +00002425{
Chuck Levere4f93232010-12-14 14:56:30 +00002426 enum nfs_stat status;
2427 int error;
2428
Chuck Leverbf269552010-12-14 14:59:29 +00002429 error = decode_nfsstat3(xdr, &status);
Chuck Levere4f93232010-12-14 14:56:30 +00002430 if (unlikely(error))
2431 goto out;
2432 if (status != NFS3_OK)
2433 goto out_default;
Trond Myklebust264d9482019-04-24 17:46:46 -04002434 error = decode_post_op_attr(xdr, result, rpc_rqst_userns(req));
Chuck Levere4f93232010-12-14 14:56:30 +00002435out:
2436 return error;
2437out_default:
Bryan Schumaker5e7e5a02012-05-10 16:47:18 -04002438 return nfs3_stat_to_errno(status);
Chuck Levere4f93232010-12-14 14:56:30 +00002439}
2440
Andreas Gruenbacherb7fa0552005-06-22 17:16:27 +00002441#endif /* CONFIG_NFS_V3_ACL */
2442
Bryan Schumaker5e7e5a02012-05-10 16:47:18 -04002443
2444/*
2445 * We need to translate between nfs status return values and
2446 * the local errno values which may not be the same.
2447 */
2448static const struct {
2449 int stat;
2450 int errno;
2451} nfs_errtbl[] = {
2452 { NFS_OK, 0 },
2453 { NFSERR_PERM, -EPERM },
2454 { NFSERR_NOENT, -ENOENT },
2455 { NFSERR_IO, -errno_NFSERR_IO},
2456 { NFSERR_NXIO, -ENXIO },
2457/* { NFSERR_EAGAIN, -EAGAIN }, */
2458 { NFSERR_ACCES, -EACCES },
2459 { NFSERR_EXIST, -EEXIST },
2460 { NFSERR_XDEV, -EXDEV },
2461 { NFSERR_NODEV, -ENODEV },
2462 { NFSERR_NOTDIR, -ENOTDIR },
2463 { NFSERR_ISDIR, -EISDIR },
2464 { NFSERR_INVAL, -EINVAL },
2465 { NFSERR_FBIG, -EFBIG },
2466 { NFSERR_NOSPC, -ENOSPC },
2467 { NFSERR_ROFS, -EROFS },
2468 { NFSERR_MLINK, -EMLINK },
2469 { NFSERR_NAMETOOLONG, -ENAMETOOLONG },
2470 { NFSERR_NOTEMPTY, -ENOTEMPTY },
2471 { NFSERR_DQUOT, -EDQUOT },
2472 { NFSERR_STALE, -ESTALE },
2473 { NFSERR_REMOTE, -EREMOTE },
2474#ifdef EWFLUSH
2475 { NFSERR_WFLUSH, -EWFLUSH },
2476#endif
2477 { NFSERR_BADHANDLE, -EBADHANDLE },
2478 { NFSERR_NOT_SYNC, -ENOTSYNC },
2479 { NFSERR_BAD_COOKIE, -EBADCOOKIE },
2480 { NFSERR_NOTSUPP, -ENOTSUPP },
2481 { NFSERR_TOOSMALL, -ETOOSMALL },
2482 { NFSERR_SERVERFAULT, -EREMOTEIO },
2483 { NFSERR_BADTYPE, -EBADTYPE },
2484 { NFSERR_JUKEBOX, -EJUKEBOX },
2485 { -1, -EIO }
2486};
2487
2488/**
2489 * nfs3_stat_to_errno - convert an NFS status code to a local errno
2490 * @status: NFS status code to convert
2491 *
2492 * Returns a local errno value, or -EIO if the NFS status code is
2493 * not recognized. This function is used jointly by NFSv2 and NFSv3.
2494 */
2495static int nfs3_stat_to_errno(enum nfs_stat status)
2496{
2497 int i;
2498
2499 for (i = 0; nfs_errtbl[i].stat != -1; i++) {
2500 if (nfs_errtbl[i].stat == (int)status)
2501 return nfs_errtbl[i].errno;
2502 }
2503 dprintk("NFS: Unrecognized nfs status value: %u\n", status);
2504 return nfs_errtbl[i].errno;
2505}
2506
2507
Linus Torvalds1da177e2005-04-16 15:20:36 -07002508#define PROC(proc, argtype, restype, timer) \
2509[NFS3PROC_##proc] = { \
2510 .p_proc = NFS3PROC_##proc, \
Christoph Hellwigfcc85812017-05-08 10:01:49 +02002511 .p_encode = nfs3_xdr_enc_##argtype##3args, \
Christoph Hellwigfc016482017-05-08 15:09:02 +02002512 .p_decode = nfs3_xdr_dec_##restype##3res, \
Chuck Leverad96b5b2010-12-14 14:56:01 +00002513 .p_arglen = NFS3_##argtype##args_sz, \
Chuck Leverf5fc3c502010-12-14 14:56:42 +00002514 .p_replen = NFS3_##restype##res_sz, \
Chuck Levercc0175c2006-03-20 13:44:22 -05002515 .p_timer = timer, \
2516 .p_statidx = NFS3PROC_##proc, \
2517 .p_name = #proc, \
Linus Torvalds1da177e2005-04-16 15:20:36 -07002518 }
2519
Christoph Hellwig511e9362017-05-12 15:36:49 +02002520const struct rpc_procinfo nfs3_procedures[] = {
Chuck Leverf5fc3c502010-12-14 14:56:42 +00002521 PROC(GETATTR, getattr, getattr, 1),
2522 PROC(SETATTR, setattr, setattr, 0),
2523 PROC(LOOKUP, lookup, lookup, 2),
2524 PROC(ACCESS, access, access, 1),
2525 PROC(READLINK, readlink, readlink, 3),
2526 PROC(READ, read, read, 3),
2527 PROC(WRITE, write, write, 4),
2528 PROC(CREATE, create, create, 0),
2529 PROC(MKDIR, mkdir, create, 0),
2530 PROC(SYMLINK, symlink, create, 0),
2531 PROC(MKNOD, mknod, create, 0),
2532 PROC(REMOVE, remove, remove, 0),
2533 PROC(RMDIR, lookup, setattr, 0),
2534 PROC(RENAME, rename, rename, 0),
2535 PROC(LINK, link, link, 0),
2536 PROC(READDIR, readdir, readdir, 3),
2537 PROC(READDIRPLUS, readdirplus, readdir, 3),
2538 PROC(FSSTAT, getattr, fsstat, 0),
2539 PROC(FSINFO, getattr, fsinfo, 0),
2540 PROC(PATHCONF, getattr, pathconf, 0),
2541 PROC(COMMIT, commit, commit, 5),
Linus Torvalds1da177e2005-04-16 15:20:36 -07002542};
2543
Christoph Hellwigc5518582017-05-08 23:27:10 +02002544static unsigned int nfs_version3_counts[ARRAY_SIZE(nfs3_procedures)];
Trond Myklebusta613fa12012-01-20 13:53:56 -05002545const struct rpc_version nfs_version3 = {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002546 .number = 3,
Tobias Klausere8c96f82006-03-24 03:15:34 -08002547 .nrprocs = ARRAY_SIZE(nfs3_procedures),
Christoph Hellwigc5518582017-05-08 23:27:10 +02002548 .procs = nfs3_procedures,
2549 .counts = nfs_version3_counts,
Linus Torvalds1da177e2005-04-16 15:20:36 -07002550};
2551
Andreas Gruenbacherb7fa0552005-06-22 17:16:27 +00002552#ifdef CONFIG_NFS_V3_ACL
Christoph Hellwig511e9362017-05-12 15:36:49 +02002553static const struct rpc_procinfo nfs3_acl_procedures[] = {
Andreas Gruenbacherb7fa0552005-06-22 17:16:27 +00002554 [ACLPROC3_GETACL] = {
2555 .p_proc = ACLPROC3_GETACL,
Christoph Hellwigfcc85812017-05-08 10:01:49 +02002556 .p_encode = nfs3_xdr_enc_getacl3args,
Christoph Hellwigfc016482017-05-08 15:09:02 +02002557 .p_decode = nfs3_xdr_dec_getacl3res,
Chuck Lever2bea90d2007-03-29 16:47:53 -04002558 .p_arglen = ACL3_getaclargs_sz,
2559 .p_replen = ACL3_getaclres_sz,
Andreas Gruenbacherb7fa0552005-06-22 17:16:27 +00002560 .p_timer = 1,
Chuck Levercc0175c2006-03-20 13:44:22 -05002561 .p_name = "GETACL",
Andreas Gruenbacherb7fa0552005-06-22 17:16:27 +00002562 },
2563 [ACLPROC3_SETACL] = {
2564 .p_proc = ACLPROC3_SETACL,
Christoph Hellwigfcc85812017-05-08 10:01:49 +02002565 .p_encode = nfs3_xdr_enc_setacl3args,
Christoph Hellwigfc016482017-05-08 15:09:02 +02002566 .p_decode = nfs3_xdr_dec_setacl3res,
Chuck Lever2bea90d2007-03-29 16:47:53 -04002567 .p_arglen = ACL3_setaclargs_sz,
2568 .p_replen = ACL3_setaclres_sz,
Andreas Gruenbacherb7fa0552005-06-22 17:16:27 +00002569 .p_timer = 0,
Chuck Levercc0175c2006-03-20 13:44:22 -05002570 .p_name = "SETACL",
Andreas Gruenbacherb7fa0552005-06-22 17:16:27 +00002571 },
2572};
2573
Christoph Hellwigc5518582017-05-08 23:27:10 +02002574static unsigned int nfs3_acl_counts[ARRAY_SIZE(nfs3_acl_procedures)];
Trond Myklebusta613fa12012-01-20 13:53:56 -05002575const struct rpc_version nfsacl_version3 = {
Andreas Gruenbacherb7fa0552005-06-22 17:16:27 +00002576 .number = 3,
Christoph Hellwig9ae7d8f2017-05-12 15:51:24 +02002577 .nrprocs = ARRAY_SIZE(nfs3_acl_procedures),
Andreas Gruenbacherb7fa0552005-06-22 17:16:27 +00002578 .procs = nfs3_acl_procedures,
Christoph Hellwigc5518582017-05-08 23:27:10 +02002579 .counts = nfs3_acl_counts,
Andreas Gruenbacherb7fa0552005-06-22 17:16:27 +00002580};
2581#endif /* CONFIG_NFS_V3_ACL */