blob: 9df898ba648f73a14b1e42be47dbfddf189ec0a6 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
Linus Torvalds1da177e2005-04-16 15:20:36 -07002 * Server-side XDR for NFSv4
3 *
4 * Copyright (c) 2002 The Regents of the University of Michigan.
5 * All rights reserved.
6 *
7 * Kendrick Smith <kmsmith@umich.edu>
8 * Andy Adamson <andros@umich.edu>
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 *
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in the
18 * documentation and/or other materials provided with the distribution.
19 * 3. Neither the name of the University nor the names of its
20 * contributors may be used to endorse or promote products derived
21 * from this software without specific prior written permission.
22 *
23 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
24 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
25 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
26 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
28 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
29 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
30 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
31 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
32 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
33 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
Linus Torvalds1da177e2005-04-16 15:20:36 -070034 */
35
Christoph Hellwig96bcad52015-06-18 16:45:01 +020036#include <linux/file.h>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090037#include <linux/slab.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070038#include <linux/namei.h>
Boaz Harrosh341eb182009-12-03 20:29:12 +020039#include <linux/statfs.h>
Andy Adamson0733d212009-04-03 08:28:01 +030040#include <linux/utsname.h>
Bryan Schumaker17456802011-07-13 10:50:48 -040041#include <linux/pagemap.h>
J. Bruce Fields4796f452007-07-17 04:04:51 -070042#include <linux/sunrpc/svcauth_gss.h>
Boaz Harrosh9a74af22009-12-03 20:30:56 +020043
J. Bruce Fields2ca72e12011-01-04 17:37:15 -050044#include "idmap.h"
45#include "acl.h"
Boaz Harrosh9a74af22009-12-03 20:30:56 +020046#include "xdr4.h"
J. Bruce Fields0a3adad2009-11-04 18:12:35 -050047#include "vfs.h"
Bryan Schumaker17456802011-07-13 10:50:48 -040048#include "state.h"
J. Bruce Fields10910062011-01-24 12:11:02 -050049#include "cache.h"
Stanislav Kinsbursky3d733712012-11-27 14:11:44 +030050#include "netns.h"
Christoph Hellwig9cf514c2014-05-05 13:11:59 +020051#include "pnfs.h"
J. Bruce Fields2ca72e12011-01-04 17:37:15 -050052
David Quigley18032ca2013-05-02 13:19:10 -040053#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
54#include <linux/security.h>
55#endif
56
57
Linus Torvalds1da177e2005-04-16 15:20:36 -070058#define NFSDDBG_FACILITY NFSDDBG_XDR
59
J.Bruce Fields42ca0992006-10-04 02:16:20 -070060/*
61 * As per referral draft, the fsid for a referral MUST be different from the fsid of the containing
62 * directory in order to indicate to the client that a filesystem boundary is present
63 * We use a fixed fsid for a referral
64 */
65#define NFS4_REFERRAL_FSID_MAJOR 0x8000000ULL
66#define NFS4_REFERRAL_FSID_MINOR 0x8000000ULL
67
Al Virob37ad282006-10-19 23:28:59 -070068static __be32
J. Bruce Fieldsa36b1722012-11-25 16:31:00 -050069check_filename(char *str, int len)
Linus Torvalds1da177e2005-04-16 15:20:36 -070070{
71 int i;
72
73 if (len == 0)
74 return nfserr_inval;
75 if (isdotent(str, len))
J. Bruce Fieldsa36b1722012-11-25 16:31:00 -050076 return nfserr_badname;
Linus Torvalds1da177e2005-04-16 15:20:36 -070077 for (i = 0; i < len; i++)
78 if (str[i] == '/')
J. Bruce Fieldsa36b1722012-11-25 16:31:00 -050079 return nfserr_badname;
Linus Torvalds1da177e2005-04-16 15:20:36 -070080 return 0;
81}
82
Linus Torvalds1da177e2005-04-16 15:20:36 -070083#define DECODE_HEAD \
Al Viro2ebbc012006-10-19 23:28:58 -070084 __be32 *p; \
Al Virob37ad282006-10-19 23:28:59 -070085 __be32 status
Linus Torvalds1da177e2005-04-16 15:20:36 -070086#define DECODE_TAIL \
87 status = 0; \
88out: \
89 return status; \
90xdr_error: \
Chuck Lever817cb9d2007-09-11 18:01:20 -040091 dprintk("NFSD: xdr error (%s:%d)\n", \
92 __FILE__, __LINE__); \
Linus Torvalds1da177e2005-04-16 15:20:36 -070093 status = nfserr_bad_xdr; \
94 goto out
95
Linus Torvalds1da177e2005-04-16 15:20:36 -070096#define READMEM(x,nbytes) do { \
97 x = (char *)p; \
98 p += XDR_QUADLEN(nbytes); \
99} while (0)
100#define SAVEMEM(x,nbytes) do { \
101 if (!(x = (p==argp->tmp || p == argp->tmpp) ? \
102 savemem(argp, p, nbytes) : \
103 (char *)p)) { \
Chuck Lever817cb9d2007-09-11 18:01:20 -0400104 dprintk("NFSD: xdr error (%s:%d)\n", \
105 __FILE__, __LINE__); \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700106 goto xdr_error; \
107 } \
108 p += XDR_QUADLEN(nbytes); \
109} while (0)
110#define COPYMEM(x,nbytes) do { \
111 memcpy((x), p, nbytes); \
112 p += XDR_QUADLEN(nbytes); \
113} while (0)
114
115/* READ_BUF, read_buf(): nbytes must be <= PAGE_SIZE */
116#define READ_BUF(nbytes) do { \
117 if (nbytes <= (u32)((char *)argp->end - (char *)argp->p)) { \
118 p = argp->p; \
119 argp->p += XDR_QUADLEN(nbytes); \
120 } else if (!(p = read_buf(argp, nbytes))) { \
Chuck Lever817cb9d2007-09-11 18:01:20 -0400121 dprintk("NFSD: xdr error (%s:%d)\n", \
122 __FILE__, __LINE__); \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700123 goto xdr_error; \
124 } \
125} while (0)
126
J. Bruce Fields590b7432013-06-21 17:06:29 -0400127static void next_decode_page(struct nfsd4_compoundargs *argp)
128{
J. Bruce Fields590b7432013-06-21 17:06:29 -0400129 argp->p = page_address(argp->pagelist[0]);
J. Bruce Fields365da4a2013-11-19 17:32:43 -0500130 argp->pagelist++;
J. Bruce Fields590b7432013-06-21 17:06:29 -0400131 if (argp->pagelen < PAGE_SIZE) {
132 argp->end = argp->p + (argp->pagelen>>2);
133 argp->pagelen = 0;
134 } else {
135 argp->end = argp->p + (PAGE_SIZE>>2);
136 argp->pagelen -= PAGE_SIZE;
137 }
138}
139
J. Bruce Fieldsca2a05a2007-11-11 15:43:12 -0500140static __be32 *read_buf(struct nfsd4_compoundargs *argp, u32 nbytes)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700141{
142 /* We want more bytes than seem to be available.
143 * Maybe we need a new page, maybe we have just run out
144 */
J. Bruce Fieldsca2a05a2007-11-11 15:43:12 -0500145 unsigned int avail = (char *)argp->end - (char *)argp->p;
Al Viro2ebbc012006-10-19 23:28:58 -0700146 __be32 *p;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700147 if (avail + argp->pagelen < nbytes)
148 return NULL;
149 if (avail + PAGE_SIZE < nbytes) /* need more than a page !! */
150 return NULL;
151 /* ok, we can do it with the current plus the next page */
152 if (nbytes <= sizeof(argp->tmp))
153 p = argp->tmp;
154 else {
Jesper Juhlf99d49a2005-11-07 01:01:34 -0800155 kfree(argp->tmpp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700156 p = argp->tmpp = kmalloc(nbytes, GFP_KERNEL);
157 if (!p)
158 return NULL;
159
160 }
J. Bruce Fieldsca2a05a2007-11-11 15:43:12 -0500161 /*
162 * The following memcpy is safe because read_buf is always
163 * called with nbytes > avail, and the two cases above both
164 * guarantee p points to at least nbytes bytes.
165 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700166 memcpy(p, argp->p, avail);
J. Bruce Fields590b7432013-06-21 17:06:29 -0400167 next_decode_page(argp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700168 memcpy(((char*)p)+avail, argp->p, (nbytes - avail));
169 argp->p += XDR_QUADLEN(nbytes - avail);
170 return p;
171}
172
Andy Adamson60adfc52009-04-03 08:28:50 +0300173static int zero_clientid(clientid_t *clid)
174{
175 return (clid->cl_boot == 0) && (clid->cl_id == 0);
176}
177
Christoph Hellwig2d8498d2013-11-20 00:24:11 -0800178/**
J. Bruce Fieldsd5e23382014-06-24 17:43:45 -0400179 * svcxdr_tmpalloc - allocate memory to be freed after compound processing
J. Bruce Fieldsce043ac2014-06-24 16:51:12 -0400180 * @argp: NFSv4 compound argument structure
181 * @p: pointer to be freed (with kfree())
Christoph Hellwig2d8498d2013-11-20 00:24:11 -0800182 *
183 * Marks @p to be freed when processing the compound operation
184 * described in @argp finishes.
185 */
J. Bruce Fieldsd5e23382014-06-24 17:43:45 -0400186static void *
187svcxdr_tmpalloc(struct nfsd4_compoundargs *argp, u32 len)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700188{
J. Bruce Fieldsd5e23382014-06-24 17:43:45 -0400189 struct svcxdr_tmpbuf *tb;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700190
J. Bruce Fieldsd5e23382014-06-24 17:43:45 -0400191 tb = kmalloc(sizeof(*tb) + len, GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700192 if (!tb)
J. Bruce Fieldsd5e23382014-06-24 17:43:45 -0400193 return NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700194 tb->next = argp->to_free;
195 argp->to_free = tb;
J. Bruce Fieldsd5e23382014-06-24 17:43:45 -0400196 return tb->buf;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700197}
198
J. Bruce Fields29c353b2014-06-24 17:06:51 -0400199/*
200 * For xdr strings that need to be passed to other kernel api's
201 * as null-terminated strings.
202 *
203 * Note null-terminating in place usually isn't safe since the
204 * buffer might end on a page boundary.
205 */
206static char *
207svcxdr_dupstr(struct nfsd4_compoundargs *argp, void *buf, u32 len)
208{
J. Bruce Fieldsd5e23382014-06-24 17:43:45 -0400209 char *p = svcxdr_tmpalloc(argp, len + 1);
J. Bruce Fields29c353b2014-06-24 17:06:51 -0400210
211 if (!p)
212 return NULL;
213 memcpy(p, buf, len);
214 p[len] = '\0';
J. Bruce Fields29c353b2014-06-24 17:06:51 -0400215 return p;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700216}
217
Christoph Hellwig2d8498d2013-11-20 00:24:11 -0800218/**
219 * savemem - duplicate a chunk of memory for later processing
220 * @argp: NFSv4 compound argument structure to be freed with
221 * @p: pointer to be duplicated
222 * @nbytes: length to be duplicated
223 *
224 * Returns a pointer to a copy of @nbytes bytes of memory at @p
225 * that are preserved until processing of the NFSv4 compound
226 * operation described by @argp finishes.
227 */
Al Viro2ebbc012006-10-19 23:28:58 -0700228static char *savemem(struct nfsd4_compoundargs *argp, __be32 *p, int nbytes)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700229{
J. Bruce Fieldsd5e23382014-06-24 17:43:45 -0400230 void *ret;
231
232 ret = svcxdr_tmpalloc(argp, nbytes);
233 if (!ret)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700234 return NULL;
J. Bruce Fieldsd5e23382014-06-24 17:43:45 -0400235 memcpy(ret, p, nbytes);
236 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700237}
238
Christoph Hellwig4c94e132015-01-22 12:09:50 +0100239/*
240 * We require the high 32 bits of 'seconds' to be 0, and
241 * we ignore all 32 bits of 'nseconds'.
242 */
243static __be32
244nfsd4_decode_time(struct nfsd4_compoundargs *argp, struct timespec *tv)
245{
246 DECODE_HEAD;
247 u64 sec;
248
249 READ_BUF(12);
250 p = xdr_decode_hyper(p, &sec);
251 tv->tv_sec = sec;
252 tv->tv_nsec = be32_to_cpup(p++);
253 if (tv->tv_nsec >= (u32)1000000000)
254 return nfserr_inval;
255
256 DECODE_TAIL;
257}
258
Al Virob37ad282006-10-19 23:28:59 -0700259static __be32
Linus Torvalds1da177e2005-04-16 15:20:36 -0700260nfsd4_decode_bitmap(struct nfsd4_compoundargs *argp, u32 *bmval)
261{
262 u32 bmlen;
263 DECODE_HEAD;
264
265 bmval[0] = 0;
266 bmval[1] = 0;
Andy Adamson7e705702009-04-03 08:29:11 +0300267 bmval[2] = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700268
269 READ_BUF(4);
J. Bruce Fields06553992014-06-02 12:32:51 -0400270 bmlen = be32_to_cpup(p++);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700271 if (bmlen > 1000)
272 goto xdr_error;
273
274 READ_BUF(bmlen << 2);
275 if (bmlen > 0)
J. Bruce Fields06553992014-06-02 12:32:51 -0400276 bmval[0] = be32_to_cpup(p++);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700277 if (bmlen > 1)
J. Bruce Fields06553992014-06-02 12:32:51 -0400278 bmval[1] = be32_to_cpup(p++);
Andy Adamson7e705702009-04-03 08:29:11 +0300279 if (bmlen > 2)
J. Bruce Fields06553992014-06-02 12:32:51 -0400280 bmval[2] = be32_to_cpup(p++);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700281
282 DECODE_TAIL;
283}
284
Al Virob37ad282006-10-19 23:28:59 -0700285static __be32
Yu Zhiguo3c8e0312009-05-16 16:22:31 +0800286nfsd4_decode_fattr(struct nfsd4_compoundargs *argp, u32 *bmval,
David Quigley18032ca2013-05-02 13:19:10 -0400287 struct iattr *iattr, struct nfs4_acl **acl,
288 struct xdr_netobj *label)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700289{
290 int expected_len, len = 0;
291 u32 dummy32;
292 char *buf;
293
294 DECODE_HEAD;
295 iattr->ia_valid = 0;
296 if ((status = nfsd4_decode_bitmap(argp, bmval)))
297 return status;
298
Linus Torvalds1da177e2005-04-16 15:20:36 -0700299 READ_BUF(4);
J. Bruce Fields06553992014-06-02 12:32:51 -0400300 expected_len = be32_to_cpup(p++);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700301
302 if (bmval[0] & FATTR4_WORD0_SIZE) {
303 READ_BUF(8);
304 len += 8;
J. Bruce Fields542d1ab2014-06-02 12:45:31 -0400305 p = xdr_decode_hyper(p, &iattr->ia_size);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700306 iattr->ia_valid |= ATTR_SIZE;
307 }
308 if (bmval[0] & FATTR4_WORD0_ACL) {
J. Bruce Fields64a817c2013-03-26 14:11:13 -0400309 u32 nace;
J. Bruce Fields28e05dd2007-02-16 01:28:30 -0800310 struct nfs4_ace *ace;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700311
312 READ_BUF(4); len += 4;
J. Bruce Fields06553992014-06-02 12:32:51 -0400313 nace = be32_to_cpup(p++);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700314
J. Bruce Fields28e05dd2007-02-16 01:28:30 -0800315 if (nace > NFS4_ACL_MAX)
J. Bruce Fields798df332014-01-29 16:39:05 -0500316 return nfserr_fbig;
J. Bruce Fields28e05dd2007-02-16 01:28:30 -0800317
J. Bruce Fieldsd5e23382014-06-24 17:43:45 -0400318 *acl = svcxdr_tmpalloc(argp, nfs4_acl_bytes(nace));
Kinglong Meeeba1c992013-12-09 18:23:46 +0800319 if (*acl == NULL)
320 return nfserr_jukebox;
321
J. Bruce Fields28e05dd2007-02-16 01:28:30 -0800322 (*acl)->naces = nace;
323 for (ace = (*acl)->aces; ace < (*acl)->aces + nace; ace++) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700324 READ_BUF(16); len += 16;
J. Bruce Fields06553992014-06-02 12:32:51 -0400325 ace->type = be32_to_cpup(p++);
326 ace->flag = be32_to_cpup(p++);
327 ace->access_mask = be32_to_cpup(p++);
328 dummy32 = be32_to_cpup(p++);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700329 READ_BUF(dummy32);
330 len += XDR_QUADLEN(dummy32) << 2;
331 READMEM(buf, dummy32);
J. Bruce Fields28e05dd2007-02-16 01:28:30 -0800332 ace->whotype = nfs4_acl_get_whotype(buf, dummy32);
J. Bruce Fields3c726022011-01-04 17:53:52 -0500333 status = nfs_ok;
J. Bruce Fields28e05dd2007-02-16 01:28:30 -0800334 if (ace->whotype != NFS4_ACL_WHO_NAMED)
Eric W. Biedermanab8e4ae2013-02-02 05:18:08 -0800335 ;
J. Bruce Fields28e05dd2007-02-16 01:28:30 -0800336 else if (ace->flag & NFS4_ACE_IDENTIFIER_GROUP)
J. Bruce Fields3c726022011-01-04 17:53:52 -0500337 status = nfsd_map_name_to_gid(argp->rqstp,
Eric W. Biedermanab8e4ae2013-02-02 05:18:08 -0800338 buf, dummy32, &ace->who_gid);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700339 else
J. Bruce Fields3c726022011-01-04 17:53:52 -0500340 status = nfsd_map_name_to_uid(argp->rqstp,
Eric W. Biedermanab8e4ae2013-02-02 05:18:08 -0800341 buf, dummy32, &ace->who_uid);
J. Bruce Fields3c726022011-01-04 17:53:52 -0500342 if (status)
343 return status;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700344 }
345 } else
346 *acl = NULL;
347 if (bmval[1] & FATTR4_WORD1_MODE) {
348 READ_BUF(4);
349 len += 4;
J. Bruce Fields06553992014-06-02 12:32:51 -0400350 iattr->ia_mode = be32_to_cpup(p++);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700351 iattr->ia_mode &= (S_IFMT | S_IALLUGO);
352 iattr->ia_valid |= ATTR_MODE;
353 }
354 if (bmval[1] & FATTR4_WORD1_OWNER) {
355 READ_BUF(4);
356 len += 4;
J. Bruce Fields06553992014-06-02 12:32:51 -0400357 dummy32 = be32_to_cpup(p++);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700358 READ_BUF(dummy32);
359 len += (XDR_QUADLEN(dummy32) << 2);
360 READMEM(buf, dummy32);
NeilBrown47c85292011-02-16 13:08:35 +1100361 if ((status = nfsd_map_name_to_uid(argp->rqstp, buf, dummy32, &iattr->ia_uid)))
362 return status;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700363 iattr->ia_valid |= ATTR_UID;
364 }
365 if (bmval[1] & FATTR4_WORD1_OWNER_GROUP) {
366 READ_BUF(4);
367 len += 4;
J. Bruce Fields06553992014-06-02 12:32:51 -0400368 dummy32 = be32_to_cpup(p++);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700369 READ_BUF(dummy32);
370 len += (XDR_QUADLEN(dummy32) << 2);
371 READMEM(buf, dummy32);
NeilBrown47c85292011-02-16 13:08:35 +1100372 if ((status = nfsd_map_name_to_gid(argp->rqstp, buf, dummy32, &iattr->ia_gid)))
373 return status;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700374 iattr->ia_valid |= ATTR_GID;
375 }
376 if (bmval[1] & FATTR4_WORD1_TIME_ACCESS_SET) {
377 READ_BUF(4);
378 len += 4;
J. Bruce Fields06553992014-06-02 12:32:51 -0400379 dummy32 = be32_to_cpup(p++);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700380 switch (dummy32) {
381 case NFS4_SET_TO_CLIENT_TIME:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700382 len += 12;
Christoph Hellwig4c94e132015-01-22 12:09:50 +0100383 status = nfsd4_decode_time(argp, &iattr->ia_atime);
384 if (status)
385 return status;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700386 iattr->ia_valid |= (ATTR_ATIME | ATTR_ATIME_SET);
387 break;
388 case NFS4_SET_TO_SERVER_TIME:
389 iattr->ia_valid |= ATTR_ATIME;
390 break;
391 default:
392 goto xdr_error;
393 }
394 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700395 if (bmval[1] & FATTR4_WORD1_TIME_MODIFY_SET) {
396 READ_BUF(4);
397 len += 4;
J. Bruce Fields06553992014-06-02 12:32:51 -0400398 dummy32 = be32_to_cpup(p++);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700399 switch (dummy32) {
400 case NFS4_SET_TO_CLIENT_TIME:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700401 len += 12;
Christoph Hellwig4c94e132015-01-22 12:09:50 +0100402 status = nfsd4_decode_time(argp, &iattr->ia_mtime);
403 if (status)
404 return status;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700405 iattr->ia_valid |= (ATTR_MTIME | ATTR_MTIME_SET);
406 break;
407 case NFS4_SET_TO_SERVER_TIME:
408 iattr->ia_valid |= ATTR_MTIME;
409 break;
410 default:
411 goto xdr_error;
412 }
413 }
David Quigley18032ca2013-05-02 13:19:10 -0400414
415 label->len = 0;
416#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
417 if (bmval[2] & FATTR4_WORD2_SECURITY_LABEL) {
418 READ_BUF(4);
419 len += 4;
J. Bruce Fields06553992014-06-02 12:32:51 -0400420 dummy32 = be32_to_cpup(p++); /* lfs: we don't use it */
David Quigley18032ca2013-05-02 13:19:10 -0400421 READ_BUF(4);
422 len += 4;
J. Bruce Fields06553992014-06-02 12:32:51 -0400423 dummy32 = be32_to_cpup(p++); /* pi: we don't use it either */
David Quigley18032ca2013-05-02 13:19:10 -0400424 READ_BUF(4);
425 len += 4;
J. Bruce Fields06553992014-06-02 12:32:51 -0400426 dummy32 = be32_to_cpup(p++);
David Quigley18032ca2013-05-02 13:19:10 -0400427 READ_BUF(dummy32);
Kinglong Mee1ec8c0c2015-03-28 23:46:09 +0800428 if (dummy32 > NFS4_MAXLABELLEN)
David Quigley18032ca2013-05-02 13:19:10 -0400429 return nfserr_badlabel;
430 len += (XDR_QUADLEN(dummy32) << 2);
431 READMEM(buf, dummy32);
J. Bruce Fields29c353b2014-06-24 17:06:51 -0400432 label->len = dummy32;
433 label->data = svcxdr_dupstr(argp, buf, dummy32);
David Quigley18032ca2013-05-02 13:19:10 -0400434 if (!label->data)
435 return nfserr_jukebox;
David Quigley18032ca2013-05-02 13:19:10 -0400436 }
437#endif
438
Yu Zhiguo3c8e0312009-05-16 16:22:31 +0800439 if (bmval[0] & ~NFSD_WRITEABLE_ATTRS_WORD0
440 || bmval[1] & ~NFSD_WRITEABLE_ATTRS_WORD1
441 || bmval[2] & ~NFSD_WRITEABLE_ATTRS_WORD2)
442 READ_BUF(expected_len - len);
443 else if (len != expected_len)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700444 goto xdr_error;
445
446 DECODE_TAIL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700447}
448
Al Virob37ad282006-10-19 23:28:59 -0700449static __be32
Benny Halevye31a1b62008-08-12 20:46:18 +0300450nfsd4_decode_stateid(struct nfsd4_compoundargs *argp, stateid_t *sid)
451{
452 DECODE_HEAD;
453
454 READ_BUF(sizeof(stateid_t));
J. Bruce Fields06553992014-06-02 12:32:51 -0400455 sid->si_generation = be32_to_cpup(p++);
Benny Halevye31a1b62008-08-12 20:46:18 +0300456 COPYMEM(&sid->si_opaque, sizeof(stateid_opaque_t));
457
458 DECODE_TAIL;
459}
460
461static __be32
Linus Torvalds1da177e2005-04-16 15:20:36 -0700462nfsd4_decode_access(struct nfsd4_compoundargs *argp, struct nfsd4_access *access)
463{
464 DECODE_HEAD;
465
466 READ_BUF(4);
J. Bruce Fields06553992014-06-02 12:32:51 -0400467 access->ac_req_access = be32_to_cpup(p++);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700468
469 DECODE_TAIL;
470}
471
J. Bruce Fieldsacb28872012-03-27 14:50:26 -0400472static __be32 nfsd4_decode_cb_sec(struct nfsd4_compoundargs *argp, struct nfsd4_cb_sec *cbs)
473{
474 DECODE_HEAD;
J. Bruce Fields12fc3e92012-11-05 16:01:48 -0500475 u32 dummy, uid, gid;
J. Bruce Fieldsacb28872012-03-27 14:50:26 -0400476 char *machine_name;
477 int i;
478 int nr_secflavs;
479
480 /* callback_sec_params4 */
481 READ_BUF(4);
J. Bruce Fields06553992014-06-02 12:32:51 -0400482 nr_secflavs = be32_to_cpup(p++);
J. Bruce Fields57569a72013-05-17 16:25:32 -0400483 if (nr_secflavs)
484 cbs->flavor = (u32)(-1);
485 else
486 /* Is this legal? Be generous, take it to mean AUTH_NONE: */
487 cbs->flavor = 0;
J. Bruce Fieldsacb28872012-03-27 14:50:26 -0400488 for (i = 0; i < nr_secflavs; ++i) {
489 READ_BUF(4);
J. Bruce Fields06553992014-06-02 12:32:51 -0400490 dummy = be32_to_cpup(p++);
J. Bruce Fieldsacb28872012-03-27 14:50:26 -0400491 switch (dummy) {
492 case RPC_AUTH_NULL:
493 /* Nothing to read */
J. Bruce Fields12fc3e92012-11-05 16:01:48 -0500494 if (cbs->flavor == (u32)(-1))
495 cbs->flavor = RPC_AUTH_NULL;
J. Bruce Fieldsacb28872012-03-27 14:50:26 -0400496 break;
497 case RPC_AUTH_UNIX:
498 READ_BUF(8);
499 /* stamp */
J. Bruce Fields06553992014-06-02 12:32:51 -0400500 dummy = be32_to_cpup(p++);
J. Bruce Fieldsacb28872012-03-27 14:50:26 -0400501
502 /* machine name */
J. Bruce Fields06553992014-06-02 12:32:51 -0400503 dummy = be32_to_cpup(p++);
J. Bruce Fieldsacb28872012-03-27 14:50:26 -0400504 READ_BUF(dummy);
505 SAVEMEM(machine_name, dummy);
506
507 /* uid, gid */
508 READ_BUF(8);
J. Bruce Fields06553992014-06-02 12:32:51 -0400509 uid = be32_to_cpup(p++);
510 gid = be32_to_cpup(p++);
J. Bruce Fieldsacb28872012-03-27 14:50:26 -0400511
512 /* more gids */
513 READ_BUF(4);
J. Bruce Fields06553992014-06-02 12:32:51 -0400514 dummy = be32_to_cpup(p++);
J. Bruce Fieldsacb28872012-03-27 14:50:26 -0400515 READ_BUF(dummy * 4);
J. Bruce Fields12fc3e92012-11-05 16:01:48 -0500516 if (cbs->flavor == (u32)(-1)) {
Eric W. Biederman03bc6d12013-02-02 06:24:49 -0800517 kuid_t kuid = make_kuid(&init_user_ns, uid);
518 kgid_t kgid = make_kgid(&init_user_ns, gid);
519 if (uid_valid(kuid) && gid_valid(kgid)) {
520 cbs->uid = kuid;
521 cbs->gid = kgid;
522 cbs->flavor = RPC_AUTH_UNIX;
523 } else {
524 dprintk("RPC_AUTH_UNIX with invalid"
525 "uid or gid ignoring!\n");
526 }
J. Bruce Fields12fc3e92012-11-05 16:01:48 -0500527 }
J. Bruce Fieldsacb28872012-03-27 14:50:26 -0400528 break;
529 case RPC_AUTH_GSS:
530 dprintk("RPC_AUTH_GSS callback secflavor "
531 "not supported!\n");
532 READ_BUF(8);
533 /* gcbp_service */
J. Bruce Fields06553992014-06-02 12:32:51 -0400534 dummy = be32_to_cpup(p++);
J. Bruce Fieldsacb28872012-03-27 14:50:26 -0400535 /* gcbp_handle_from_server */
J. Bruce Fields06553992014-06-02 12:32:51 -0400536 dummy = be32_to_cpup(p++);
J. Bruce Fieldsacb28872012-03-27 14:50:26 -0400537 READ_BUF(dummy);
538 p += XDR_QUADLEN(dummy);
539 /* gcbp_handle_from_client */
540 READ_BUF(4);
J. Bruce Fields06553992014-06-02 12:32:51 -0400541 dummy = be32_to_cpup(p++);
J. Bruce Fieldsacb28872012-03-27 14:50:26 -0400542 READ_BUF(dummy);
543 break;
544 default:
545 dprintk("Illegal callback secflavor\n");
546 return nfserr_inval;
547 }
548 }
549 DECODE_TAIL;
550}
551
J. Bruce Fieldscb73a9f2012-11-01 18:09:48 -0400552static __be32 nfsd4_decode_backchannel_ctl(struct nfsd4_compoundargs *argp, struct nfsd4_backchannel_ctl *bc)
553{
554 DECODE_HEAD;
555
556 READ_BUF(4);
J. Bruce Fields06553992014-06-02 12:32:51 -0400557 bc->bc_cb_program = be32_to_cpup(p++);
J. Bruce Fieldscb73a9f2012-11-01 18:09:48 -0400558 nfsd4_decode_cb_sec(argp, &bc->bc_cb_sec);
559
560 DECODE_TAIL;
561}
562
J. Bruce Fields1d1bc8f2010-10-04 23:12:59 -0400563static __be32 nfsd4_decode_bind_conn_to_session(struct nfsd4_compoundargs *argp, struct nfsd4_bind_conn_to_session *bcts)
564{
565 DECODE_HEAD;
J. Bruce Fields1d1bc8f2010-10-04 23:12:59 -0400566
567 READ_BUF(NFS4_MAX_SESSIONID_LEN + 8);
568 COPYMEM(bcts->sessionid.data, NFS4_MAX_SESSIONID_LEN);
J. Bruce Fields06553992014-06-02 12:32:51 -0400569 bcts->dir = be32_to_cpup(p++);
Bryan Schumaker6ce23572011-04-27 15:47:16 -0400570 /* XXX: skipping ctsa_use_conn_in_rdma_mode. Perhaps Tom Tucker
571 * could help us figure out we should be using it. */
J. Bruce Fields1d1bc8f2010-10-04 23:12:59 -0400572 DECODE_TAIL;
573}
574
Al Virob37ad282006-10-19 23:28:59 -0700575static __be32
Linus Torvalds1da177e2005-04-16 15:20:36 -0700576nfsd4_decode_close(struct nfsd4_compoundargs *argp, struct nfsd4_close *close)
577{
578 DECODE_HEAD;
579
Benny Halevye31a1b62008-08-12 20:46:18 +0300580 READ_BUF(4);
J. Bruce Fields06553992014-06-02 12:32:51 -0400581 close->cl_seqid = be32_to_cpup(p++);
Benny Halevye31a1b62008-08-12 20:46:18 +0300582 return nfsd4_decode_stateid(argp, &close->cl_stateid);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700583
584 DECODE_TAIL;
585}
586
587
Al Virob37ad282006-10-19 23:28:59 -0700588static __be32
Linus Torvalds1da177e2005-04-16 15:20:36 -0700589nfsd4_decode_commit(struct nfsd4_compoundargs *argp, struct nfsd4_commit *commit)
590{
591 DECODE_HEAD;
592
593 READ_BUF(12);
J. Bruce Fields542d1ab2014-06-02 12:45:31 -0400594 p = xdr_decode_hyper(p, &commit->co_offset);
J. Bruce Fields06553992014-06-02 12:32:51 -0400595 commit->co_count = be32_to_cpup(p++);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700596
597 DECODE_TAIL;
598}
599
Al Virob37ad282006-10-19 23:28:59 -0700600static __be32
Linus Torvalds1da177e2005-04-16 15:20:36 -0700601nfsd4_decode_create(struct nfsd4_compoundargs *argp, struct nfsd4_create *create)
602{
603 DECODE_HEAD;
604
605 READ_BUF(4);
J. Bruce Fields06553992014-06-02 12:32:51 -0400606 create->cr_type = be32_to_cpup(p++);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700607 switch (create->cr_type) {
608 case NF4LNK:
609 READ_BUF(4);
J. Bruce Fields7fb84302014-06-24 15:06:41 -0400610 create->cr_datalen = be32_to_cpup(p++);
611 READ_BUF(create->cr_datalen);
J. Bruce Fields29c353b2014-06-24 17:06:51 -0400612 create->cr_data = svcxdr_dupstr(argp, p, create->cr_datalen);
J. Bruce Fields7fb84302014-06-24 15:06:41 -0400613 if (!create->cr_data)
J. Bruce Fields76f471282014-06-19 16:44:48 -0400614 return nfserr_jukebox;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700615 break;
616 case NF4BLK:
617 case NF4CHR:
618 READ_BUF(8);
J. Bruce Fields06553992014-06-02 12:32:51 -0400619 create->cr_specdata1 = be32_to_cpup(p++);
620 create->cr_specdata2 = be32_to_cpup(p++);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700621 break;
622 case NF4SOCK:
623 case NF4FIFO:
624 case NF4DIR:
625 default:
626 break;
627 }
628
629 READ_BUF(4);
J. Bruce Fields06553992014-06-02 12:32:51 -0400630 create->cr_namelen = be32_to_cpup(p++);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700631 READ_BUF(create->cr_namelen);
632 SAVEMEM(create->cr_name, create->cr_namelen);
J. Bruce Fieldsa36b1722012-11-25 16:31:00 -0500633 if ((status = check_filename(create->cr_name, create->cr_namelen)))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700634 return status;
635
Yu Zhiguo3c8e0312009-05-16 16:22:31 +0800636 status = nfsd4_decode_fattr(argp, create->cr_bmval, &create->cr_iattr,
David Quigley18032ca2013-05-02 13:19:10 -0400637 &create->cr_acl, &create->cr_label);
Benny Halevyc0d6fc82009-04-03 08:29:05 +0300638 if (status)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700639 goto out;
640
641 DECODE_TAIL;
642}
643
Al Virob37ad282006-10-19 23:28:59 -0700644static inline __be32
Linus Torvalds1da177e2005-04-16 15:20:36 -0700645nfsd4_decode_delegreturn(struct nfsd4_compoundargs *argp, struct nfsd4_delegreturn *dr)
646{
Benny Halevye31a1b62008-08-12 20:46:18 +0300647 return nfsd4_decode_stateid(argp, &dr->dr_stateid);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700648}
649
Al Virob37ad282006-10-19 23:28:59 -0700650static inline __be32
Linus Torvalds1da177e2005-04-16 15:20:36 -0700651nfsd4_decode_getattr(struct nfsd4_compoundargs *argp, struct nfsd4_getattr *getattr)
652{
653 return nfsd4_decode_bitmap(argp, getattr->ga_bmval);
654}
655
Al Virob37ad282006-10-19 23:28:59 -0700656static __be32
Linus Torvalds1da177e2005-04-16 15:20:36 -0700657nfsd4_decode_link(struct nfsd4_compoundargs *argp, struct nfsd4_link *link)
658{
659 DECODE_HEAD;
660
661 READ_BUF(4);
J. Bruce Fields06553992014-06-02 12:32:51 -0400662 link->li_namelen = be32_to_cpup(p++);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700663 READ_BUF(link->li_namelen);
664 SAVEMEM(link->li_name, link->li_namelen);
J. Bruce Fieldsa36b1722012-11-25 16:31:00 -0500665 if ((status = check_filename(link->li_name, link->li_namelen)))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700666 return status;
667
668 DECODE_TAIL;
669}
670
Al Virob37ad282006-10-19 23:28:59 -0700671static __be32
Linus Torvalds1da177e2005-04-16 15:20:36 -0700672nfsd4_decode_lock(struct nfsd4_compoundargs *argp, struct nfsd4_lock *lock)
673{
674 DECODE_HEAD;
675
Linus Torvalds1da177e2005-04-16 15:20:36 -0700676 /*
677 * type, reclaim(boolean), offset, length, new_lock_owner(boolean)
678 */
679 READ_BUF(28);
J. Bruce Fields06553992014-06-02 12:32:51 -0400680 lock->lk_type = be32_to_cpup(p++);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700681 if ((lock->lk_type < NFS4_READ_LT) || (lock->lk_type > NFS4_WRITEW_LT))
682 goto xdr_error;
J. Bruce Fields06553992014-06-02 12:32:51 -0400683 lock->lk_reclaim = be32_to_cpup(p++);
J. Bruce Fields542d1ab2014-06-02 12:45:31 -0400684 p = xdr_decode_hyper(p, &lock->lk_offset);
685 p = xdr_decode_hyper(p, &lock->lk_length);
J. Bruce Fields06553992014-06-02 12:32:51 -0400686 lock->lk_is_new = be32_to_cpup(p++);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700687
688 if (lock->lk_is_new) {
Benny Halevye31a1b62008-08-12 20:46:18 +0300689 READ_BUF(4);
J. Bruce Fields06553992014-06-02 12:32:51 -0400690 lock->lk_new_open_seqid = be32_to_cpup(p++);
Benny Halevye31a1b62008-08-12 20:46:18 +0300691 status = nfsd4_decode_stateid(argp, &lock->lk_new_open_stateid);
692 if (status)
693 return status;
694 READ_BUF(8 + sizeof(clientid_t));
J. Bruce Fields06553992014-06-02 12:32:51 -0400695 lock->lk_new_lock_seqid = be32_to_cpup(p++);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700696 COPYMEM(&lock->lk_new_clientid, sizeof(clientid_t));
J. Bruce Fields06553992014-06-02 12:32:51 -0400697 lock->lk_new_owner.len = be32_to_cpup(p++);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700698 READ_BUF(lock->lk_new_owner.len);
699 READMEM(lock->lk_new_owner.data, lock->lk_new_owner.len);
700 } else {
Benny Halevye31a1b62008-08-12 20:46:18 +0300701 status = nfsd4_decode_stateid(argp, &lock->lk_old_lock_stateid);
702 if (status)
703 return status;
704 READ_BUF(4);
J. Bruce Fields06553992014-06-02 12:32:51 -0400705 lock->lk_old_lock_seqid = be32_to_cpup(p++);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700706 }
707
708 DECODE_TAIL;
709}
710
Al Virob37ad282006-10-19 23:28:59 -0700711static __be32
Linus Torvalds1da177e2005-04-16 15:20:36 -0700712nfsd4_decode_lockt(struct nfsd4_compoundargs *argp, struct nfsd4_lockt *lockt)
713{
714 DECODE_HEAD;
715
716 READ_BUF(32);
J. Bruce Fields06553992014-06-02 12:32:51 -0400717 lockt->lt_type = be32_to_cpup(p++);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700718 if((lockt->lt_type < NFS4_READ_LT) || (lockt->lt_type > NFS4_WRITEW_LT))
719 goto xdr_error;
J. Bruce Fields542d1ab2014-06-02 12:45:31 -0400720 p = xdr_decode_hyper(p, &lockt->lt_offset);
721 p = xdr_decode_hyper(p, &lockt->lt_length);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700722 COPYMEM(&lockt->lt_clientid, 8);
J. Bruce Fields06553992014-06-02 12:32:51 -0400723 lockt->lt_owner.len = be32_to_cpup(p++);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700724 READ_BUF(lockt->lt_owner.len);
725 READMEM(lockt->lt_owner.data, lockt->lt_owner.len);
726
727 DECODE_TAIL;
728}
729
Al Virob37ad282006-10-19 23:28:59 -0700730static __be32
Linus Torvalds1da177e2005-04-16 15:20:36 -0700731nfsd4_decode_locku(struct nfsd4_compoundargs *argp, struct nfsd4_locku *locku)
732{
733 DECODE_HEAD;
734
Benny Halevye31a1b62008-08-12 20:46:18 +0300735 READ_BUF(8);
J. Bruce Fields06553992014-06-02 12:32:51 -0400736 locku->lu_type = be32_to_cpup(p++);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700737 if ((locku->lu_type < NFS4_READ_LT) || (locku->lu_type > NFS4_WRITEW_LT))
738 goto xdr_error;
J. Bruce Fields06553992014-06-02 12:32:51 -0400739 locku->lu_seqid = be32_to_cpup(p++);
Benny Halevye31a1b62008-08-12 20:46:18 +0300740 status = nfsd4_decode_stateid(argp, &locku->lu_stateid);
741 if (status)
742 return status;
743 READ_BUF(16);
J. Bruce Fields542d1ab2014-06-02 12:45:31 -0400744 p = xdr_decode_hyper(p, &locku->lu_offset);
745 p = xdr_decode_hyper(p, &locku->lu_length);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700746
747 DECODE_TAIL;
748}
749
Al Virob37ad282006-10-19 23:28:59 -0700750static __be32
Linus Torvalds1da177e2005-04-16 15:20:36 -0700751nfsd4_decode_lookup(struct nfsd4_compoundargs *argp, struct nfsd4_lookup *lookup)
752{
753 DECODE_HEAD;
754
755 READ_BUF(4);
J. Bruce Fields06553992014-06-02 12:32:51 -0400756 lookup->lo_len = be32_to_cpup(p++);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700757 READ_BUF(lookup->lo_len);
758 SAVEMEM(lookup->lo_name, lookup->lo_len);
J. Bruce Fieldsa36b1722012-11-25 16:31:00 -0500759 if ((status = check_filename(lookup->lo_name, lookup->lo_len)))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700760 return status;
761
762 DECODE_TAIL;
763}
764
Benny Halevy2c8bd7e2012-02-16 20:57:09 +0200765static __be32 nfsd4_decode_share_access(struct nfsd4_compoundargs *argp, u32 *share_access, u32 *deleg_want, u32 *deleg_when)
J. Bruce Fields04f9e662011-10-10 14:37:13 -0400766{
767 __be32 *p;
768 u32 w;
769
770 READ_BUF(4);
J. Bruce Fields06553992014-06-02 12:32:51 -0400771 w = be32_to_cpup(p++);
Benny Halevy2c8bd7e2012-02-16 20:57:09 +0200772 *share_access = w & NFS4_SHARE_ACCESS_MASK;
773 *deleg_want = w & NFS4_SHARE_WANT_MASK;
774 if (deleg_when)
775 *deleg_when = w & NFS4_SHARE_WHEN_MASK;
776
J. Bruce Fields04f9e662011-10-10 14:37:13 -0400777 switch (w & NFS4_SHARE_ACCESS_MASK) {
778 case NFS4_SHARE_ACCESS_READ:
779 case NFS4_SHARE_ACCESS_WRITE:
780 case NFS4_SHARE_ACCESS_BOTH:
781 break;
782 default:
783 return nfserr_bad_xdr;
784 }
Benny Halevyfc0d14f2011-10-27 20:43:01 +0200785 w &= ~NFS4_SHARE_ACCESS_MASK;
J. Bruce Fields04f9e662011-10-10 14:37:13 -0400786 if (!w)
787 return nfs_ok;
788 if (!argp->minorversion)
789 return nfserr_bad_xdr;
790 switch (w & NFS4_SHARE_WANT_MASK) {
791 case NFS4_SHARE_WANT_NO_PREFERENCE:
792 case NFS4_SHARE_WANT_READ_DELEG:
793 case NFS4_SHARE_WANT_WRITE_DELEG:
794 case NFS4_SHARE_WANT_ANY_DELEG:
795 case NFS4_SHARE_WANT_NO_DELEG:
796 case NFS4_SHARE_WANT_CANCEL:
797 break;
798 default:
799 return nfserr_bad_xdr;
800 }
Benny Halevy92bac8c2011-10-19 19:13:29 -0700801 w &= ~NFS4_SHARE_WANT_MASK;
J. Bruce Fields04f9e662011-10-10 14:37:13 -0400802 if (!w)
803 return nfs_ok;
Benny Halevy2c8bd7e2012-02-16 20:57:09 +0200804
805 if (!deleg_when) /* open_downgrade */
806 return nfserr_inval;
J. Bruce Fields04f9e662011-10-10 14:37:13 -0400807 switch (w) {
808 case NFS4_SHARE_SIGNAL_DELEG_WHEN_RESRC_AVAIL:
809 case NFS4_SHARE_PUSH_DELEG_WHEN_UNCONTENDED:
Benny Halevyc668fc62011-10-19 19:13:13 -0700810 case (NFS4_SHARE_SIGNAL_DELEG_WHEN_RESRC_AVAIL |
811 NFS4_SHARE_PUSH_DELEG_WHEN_UNCONTENDED):
J. Bruce Fields04f9e662011-10-10 14:37:13 -0400812 return nfs_ok;
813 }
814xdr_error:
815 return nfserr_bad_xdr;
816}
817
818static __be32 nfsd4_decode_share_deny(struct nfsd4_compoundargs *argp, u32 *x)
819{
820 __be32 *p;
821
822 READ_BUF(4);
J. Bruce Fields06553992014-06-02 12:32:51 -0400823 *x = be32_to_cpup(p++);
J. Bruce Fields04f9e662011-10-10 14:37:13 -0400824 /* Note: unlinke access bits, deny bits may be zero. */
Dan Carpenter01cd4af2011-10-17 10:41:17 +0300825 if (*x & ~NFS4_SHARE_DENY_BOTH)
J. Bruce Fields04f9e662011-10-10 14:37:13 -0400826 return nfserr_bad_xdr;
827 return nfs_ok;
828xdr_error:
829 return nfserr_bad_xdr;
830}
831
J. Bruce Fieldsa084daf2011-10-10 15:07:40 -0400832static __be32 nfsd4_decode_opaque(struct nfsd4_compoundargs *argp, struct xdr_netobj *o)
833{
834 __be32 *p;
835
836 READ_BUF(4);
J. Bruce Fields06553992014-06-02 12:32:51 -0400837 o->len = be32_to_cpup(p++);
J. Bruce Fieldsa084daf2011-10-10 15:07:40 -0400838
839 if (o->len == 0 || o->len > NFS4_OPAQUE_LIMIT)
840 return nfserr_bad_xdr;
841
842 READ_BUF(o->len);
843 SAVEMEM(o->data, o->len);
844 return nfs_ok;
845xdr_error:
846 return nfserr_bad_xdr;
847}
848
Al Virob37ad282006-10-19 23:28:59 -0700849static __be32
Linus Torvalds1da177e2005-04-16 15:20:36 -0700850nfsd4_decode_open(struct nfsd4_compoundargs *argp, struct nfsd4_open *open)
851{
852 DECODE_HEAD;
Benny Halevy2c8bd7e2012-02-16 20:57:09 +0200853 u32 dummy;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700854
855 memset(open->op_bmval, 0, sizeof(open->op_bmval));
856 open->op_iattr.ia_valid = 0;
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -0400857 open->op_openowner = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700858
J. Bruce Fields9d313b12013-02-28 12:51:49 -0800859 open->op_xdr_error = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700860 /* seqid, share_access, share_deny, clientid, ownerlen */
J. Bruce Fields04f9e662011-10-10 14:37:13 -0400861 READ_BUF(4);
J. Bruce Fields06553992014-06-02 12:32:51 -0400862 open->op_seqid = be32_to_cpup(p++);
Benny Halevy2c8bd7e2012-02-16 20:57:09 +0200863 /* decode, yet ignore deleg_when until supported */
864 status = nfsd4_decode_share_access(argp, &open->op_share_access,
865 &open->op_deleg_want, &dummy);
J. Bruce Fields04f9e662011-10-10 14:37:13 -0400866 if (status)
867 goto xdr_error;
868 status = nfsd4_decode_share_deny(argp, &open->op_share_deny);
869 if (status)
870 goto xdr_error;
J. Bruce Fieldsa084daf2011-10-10 15:07:40 -0400871 READ_BUF(sizeof(clientid_t));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700872 COPYMEM(&open->op_clientid, sizeof(clientid_t));
J. Bruce Fieldsa084daf2011-10-10 15:07:40 -0400873 status = nfsd4_decode_opaque(argp, &open->op_owner);
874 if (status)
875 goto xdr_error;
876 READ_BUF(4);
J. Bruce Fields06553992014-06-02 12:32:51 -0400877 open->op_create = be32_to_cpup(p++);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700878 switch (open->op_create) {
879 case NFS4_OPEN_NOCREATE:
880 break;
881 case NFS4_OPEN_CREATE:
882 READ_BUF(4);
J. Bruce Fields06553992014-06-02 12:32:51 -0400883 open->op_createmode = be32_to_cpup(p++);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700884 switch (open->op_createmode) {
885 case NFS4_CREATE_UNCHECKED:
886 case NFS4_CREATE_GUARDED:
Benny Halevyc0d6fc82009-04-03 08:29:05 +0300887 status = nfsd4_decode_fattr(argp, open->op_bmval,
David Quigley18032ca2013-05-02 13:19:10 -0400888 &open->op_iattr, &open->op_acl, &open->op_label);
Benny Halevyc0d6fc82009-04-03 08:29:05 +0300889 if (status)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700890 goto out;
891 break;
892 case NFS4_CREATE_EXCLUSIVE:
Chuck Leverab4684d2012-03-02 17:13:50 -0500893 READ_BUF(NFS4_VERIFIER_SIZE);
894 COPYMEM(open->op_verf.data, NFS4_VERIFIER_SIZE);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700895 break;
Benny Halevy79fb54a2009-04-03 08:29:17 +0300896 case NFS4_CREATE_EXCLUSIVE4_1:
897 if (argp->minorversion < 1)
898 goto xdr_error;
Chuck Leverab4684d2012-03-02 17:13:50 -0500899 READ_BUF(NFS4_VERIFIER_SIZE);
900 COPYMEM(open->op_verf.data, NFS4_VERIFIER_SIZE);
Benny Halevy79fb54a2009-04-03 08:29:17 +0300901 status = nfsd4_decode_fattr(argp, open->op_bmval,
David Quigley18032ca2013-05-02 13:19:10 -0400902 &open->op_iattr, &open->op_acl, &open->op_label);
Benny Halevy79fb54a2009-04-03 08:29:17 +0300903 if (status)
904 goto out;
905 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700906 default:
907 goto xdr_error;
908 }
909 break;
910 default:
911 goto xdr_error;
912 }
913
914 /* open_claim */
915 READ_BUF(4);
J. Bruce Fields06553992014-06-02 12:32:51 -0400916 open->op_claim_type = be32_to_cpup(p++);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700917 switch (open->op_claim_type) {
918 case NFS4_OPEN_CLAIM_NULL:
919 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
920 READ_BUF(4);
J. Bruce Fields06553992014-06-02 12:32:51 -0400921 open->op_fname.len = be32_to_cpup(p++);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700922 READ_BUF(open->op_fname.len);
923 SAVEMEM(open->op_fname.data, open->op_fname.len);
J. Bruce Fieldsa36b1722012-11-25 16:31:00 -0500924 if ((status = check_filename(open->op_fname.data, open->op_fname.len)))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700925 return status;
926 break;
927 case NFS4_OPEN_CLAIM_PREVIOUS:
928 READ_BUF(4);
J. Bruce Fields06553992014-06-02 12:32:51 -0400929 open->op_delegate_type = be32_to_cpup(p++);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700930 break;
931 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
Benny Halevye31a1b62008-08-12 20:46:18 +0300932 status = nfsd4_decode_stateid(argp, &open->op_delegate_stateid);
933 if (status)
934 return status;
935 READ_BUF(4);
J. Bruce Fields06553992014-06-02 12:32:51 -0400936 open->op_fname.len = be32_to_cpup(p++);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700937 READ_BUF(open->op_fname.len);
938 SAVEMEM(open->op_fname.data, open->op_fname.len);
J. Bruce Fieldsa36b1722012-11-25 16:31:00 -0500939 if ((status = check_filename(open->op_fname.data, open->op_fname.len)))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700940 return status;
941 break;
J. Bruce Fields8b289b22011-10-19 11:52:12 -0400942 case NFS4_OPEN_CLAIM_FH:
943 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
944 if (argp->minorversion < 1)
945 goto xdr_error;
946 /* void */
947 break;
948 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
949 if (argp->minorversion < 1)
950 goto xdr_error;
951 status = nfsd4_decode_stateid(argp, &open->op_delegate_stateid);
952 if (status)
953 return status;
954 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700955 default:
956 goto xdr_error;
957 }
958
959 DECODE_TAIL;
960}
961
Al Virob37ad282006-10-19 23:28:59 -0700962static __be32
Linus Torvalds1da177e2005-04-16 15:20:36 -0700963nfsd4_decode_open_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_open_confirm *open_conf)
964{
965 DECODE_HEAD;
Anna Schumakere1a90eb2013-10-30 10:00:20 -0400966
967 if (argp->minorversion >= 1)
968 return nfserr_notsupp;
969
Benny Halevye31a1b62008-08-12 20:46:18 +0300970 status = nfsd4_decode_stateid(argp, &open_conf->oc_req_stateid);
971 if (status)
972 return status;
973 READ_BUF(4);
J. Bruce Fields06553992014-06-02 12:32:51 -0400974 open_conf->oc_seqid = be32_to_cpup(p++);
Anna Schumakere1a90eb2013-10-30 10:00:20 -0400975
Linus Torvalds1da177e2005-04-16 15:20:36 -0700976 DECODE_TAIL;
977}
978
Al Virob37ad282006-10-19 23:28:59 -0700979static __be32
Linus Torvalds1da177e2005-04-16 15:20:36 -0700980nfsd4_decode_open_downgrade(struct nfsd4_compoundargs *argp, struct nfsd4_open_downgrade *open_down)
981{
982 DECODE_HEAD;
983
Benny Halevye31a1b62008-08-12 20:46:18 +0300984 status = nfsd4_decode_stateid(argp, &open_down->od_stateid);
985 if (status)
986 return status;
J. Bruce Fields04f9e662011-10-10 14:37:13 -0400987 READ_BUF(4);
J. Bruce Fields06553992014-06-02 12:32:51 -0400988 open_down->od_seqid = be32_to_cpup(p++);
Benny Halevy2c8bd7e2012-02-16 20:57:09 +0200989 status = nfsd4_decode_share_access(argp, &open_down->od_share_access,
990 &open_down->od_deleg_want, NULL);
J. Bruce Fields04f9e662011-10-10 14:37:13 -0400991 if (status)
992 return status;
993 status = nfsd4_decode_share_deny(argp, &open_down->od_share_deny);
994 if (status)
995 return status;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700996 DECODE_TAIL;
997}
998
Al Virob37ad282006-10-19 23:28:59 -0700999static __be32
Linus Torvalds1da177e2005-04-16 15:20:36 -07001000nfsd4_decode_putfh(struct nfsd4_compoundargs *argp, struct nfsd4_putfh *putfh)
1001{
1002 DECODE_HEAD;
1003
1004 READ_BUF(4);
J. Bruce Fields06553992014-06-02 12:32:51 -04001005 putfh->pf_fhlen = be32_to_cpup(p++);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001006 if (putfh->pf_fhlen > NFS4_FHSIZE)
1007 goto xdr_error;
1008 READ_BUF(putfh->pf_fhlen);
1009 SAVEMEM(putfh->pf_fhval, putfh->pf_fhlen);
1010
1011 DECODE_TAIL;
1012}
1013
Al Virob37ad282006-10-19 23:28:59 -07001014static __be32
Anna Schumakere1a90eb2013-10-30 10:00:20 -04001015nfsd4_decode_putpubfh(struct nfsd4_compoundargs *argp, void *p)
1016{
1017 if (argp->minorversion == 0)
1018 return nfs_ok;
1019 return nfserr_notsupp;
1020}
1021
1022static __be32
Linus Torvalds1da177e2005-04-16 15:20:36 -07001023nfsd4_decode_read(struct nfsd4_compoundargs *argp, struct nfsd4_read *read)
1024{
1025 DECODE_HEAD;
1026
Benny Halevye31a1b62008-08-12 20:46:18 +03001027 status = nfsd4_decode_stateid(argp, &read->rd_stateid);
1028 if (status)
1029 return status;
1030 READ_BUF(12);
J. Bruce Fields542d1ab2014-06-02 12:45:31 -04001031 p = xdr_decode_hyper(p, &read->rd_offset);
J. Bruce Fields06553992014-06-02 12:32:51 -04001032 read->rd_length = be32_to_cpup(p++);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001033
1034 DECODE_TAIL;
1035}
1036
Al Virob37ad282006-10-19 23:28:59 -07001037static __be32
Linus Torvalds1da177e2005-04-16 15:20:36 -07001038nfsd4_decode_readdir(struct nfsd4_compoundargs *argp, struct nfsd4_readdir *readdir)
1039{
1040 DECODE_HEAD;
1041
1042 READ_BUF(24);
J. Bruce Fields542d1ab2014-06-02 12:45:31 -04001043 p = xdr_decode_hyper(p, &readdir->rd_cookie);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001044 COPYMEM(readdir->rd_verf.data, sizeof(readdir->rd_verf.data));
J. Bruce Fields06553992014-06-02 12:32:51 -04001045 readdir->rd_dircount = be32_to_cpup(p++);
1046 readdir->rd_maxcount = be32_to_cpup(p++);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001047 if ((status = nfsd4_decode_bitmap(argp, readdir->rd_bmval)))
1048 goto out;
1049
1050 DECODE_TAIL;
1051}
1052
Al Virob37ad282006-10-19 23:28:59 -07001053static __be32
Linus Torvalds1da177e2005-04-16 15:20:36 -07001054nfsd4_decode_remove(struct nfsd4_compoundargs *argp, struct nfsd4_remove *remove)
1055{
1056 DECODE_HEAD;
1057
1058 READ_BUF(4);
J. Bruce Fields06553992014-06-02 12:32:51 -04001059 remove->rm_namelen = be32_to_cpup(p++);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001060 READ_BUF(remove->rm_namelen);
1061 SAVEMEM(remove->rm_name, remove->rm_namelen);
J. Bruce Fieldsa36b1722012-11-25 16:31:00 -05001062 if ((status = check_filename(remove->rm_name, remove->rm_namelen)))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001063 return status;
1064
1065 DECODE_TAIL;
1066}
1067
Al Virob37ad282006-10-19 23:28:59 -07001068static __be32
Linus Torvalds1da177e2005-04-16 15:20:36 -07001069nfsd4_decode_rename(struct nfsd4_compoundargs *argp, struct nfsd4_rename *rename)
1070{
1071 DECODE_HEAD;
1072
1073 READ_BUF(4);
J. Bruce Fields06553992014-06-02 12:32:51 -04001074 rename->rn_snamelen = be32_to_cpup(p++);
J. Bruce Fields4aed9c42016-02-29 20:21:21 -05001075 READ_BUF(rename->rn_snamelen);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001076 SAVEMEM(rename->rn_sname, rename->rn_snamelen);
J. Bruce Fields4aed9c42016-02-29 20:21:21 -05001077 READ_BUF(4);
J. Bruce Fields06553992014-06-02 12:32:51 -04001078 rename->rn_tnamelen = be32_to_cpup(p++);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001079 READ_BUF(rename->rn_tnamelen);
1080 SAVEMEM(rename->rn_tname, rename->rn_tnamelen);
J. Bruce Fieldsa36b1722012-11-25 16:31:00 -05001081 if ((status = check_filename(rename->rn_sname, rename->rn_snamelen)))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001082 return status;
J. Bruce Fieldsa36b1722012-11-25 16:31:00 -05001083 if ((status = check_filename(rename->rn_tname, rename->rn_tnamelen)))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001084 return status;
1085
1086 DECODE_TAIL;
1087}
1088
Al Virob37ad282006-10-19 23:28:59 -07001089static __be32
Linus Torvalds1da177e2005-04-16 15:20:36 -07001090nfsd4_decode_renew(struct nfsd4_compoundargs *argp, clientid_t *clientid)
1091{
1092 DECODE_HEAD;
1093
Anna Schumakere1a90eb2013-10-30 10:00:20 -04001094 if (argp->minorversion >= 1)
1095 return nfserr_notsupp;
1096
Linus Torvalds1da177e2005-04-16 15:20:36 -07001097 READ_BUF(sizeof(clientid_t));
1098 COPYMEM(clientid, sizeof(clientid_t));
1099
1100 DECODE_TAIL;
1101}
1102
Al Virob37ad282006-10-19 23:28:59 -07001103static __be32
Andy Adamsondcb488a32007-07-17 04:04:51 -07001104nfsd4_decode_secinfo(struct nfsd4_compoundargs *argp,
1105 struct nfsd4_secinfo *secinfo)
1106{
1107 DECODE_HEAD;
1108
1109 READ_BUF(4);
J. Bruce Fields06553992014-06-02 12:32:51 -04001110 secinfo->si_namelen = be32_to_cpup(p++);
Andy Adamsondcb488a32007-07-17 04:04:51 -07001111 READ_BUF(secinfo->si_namelen);
1112 SAVEMEM(secinfo->si_name, secinfo->si_namelen);
J. Bruce Fieldsa36b1722012-11-25 16:31:00 -05001113 status = check_filename(secinfo->si_name, secinfo->si_namelen);
Andy Adamsondcb488a32007-07-17 04:04:51 -07001114 if (status)
1115 return status;
1116 DECODE_TAIL;
1117}
1118
1119static __be32
J. Bruce Fields04f4ad12010-12-16 09:51:13 -05001120nfsd4_decode_secinfo_no_name(struct nfsd4_compoundargs *argp,
1121 struct nfsd4_secinfo_no_name *sin)
1122{
1123 DECODE_HEAD;
1124
1125 READ_BUF(4);
J. Bruce Fields06553992014-06-02 12:32:51 -04001126 sin->sin_style = be32_to_cpup(p++);
J. Bruce Fields04f4ad12010-12-16 09:51:13 -05001127 DECODE_TAIL;
1128}
1129
1130static __be32
Linus Torvalds1da177e2005-04-16 15:20:36 -07001131nfsd4_decode_setattr(struct nfsd4_compoundargs *argp, struct nfsd4_setattr *setattr)
1132{
Benny Halevye31a1b62008-08-12 20:46:18 +03001133 __be32 status;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001134
Benny Halevye31a1b62008-08-12 20:46:18 +03001135 status = nfsd4_decode_stateid(argp, &setattr->sa_stateid);
1136 if (status)
1137 return status;
Yu Zhiguo3c8e0312009-05-16 16:22:31 +08001138 return nfsd4_decode_fattr(argp, setattr->sa_bmval, &setattr->sa_iattr,
David Quigley18032ca2013-05-02 13:19:10 -04001139 &setattr->sa_acl, &setattr->sa_label);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001140}
1141
Al Virob37ad282006-10-19 23:28:59 -07001142static __be32
Linus Torvalds1da177e2005-04-16 15:20:36 -07001143nfsd4_decode_setclientid(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid *setclientid)
1144{
1145 DECODE_HEAD;
1146
Anna Schumakere1a90eb2013-10-30 10:00:20 -04001147 if (argp->minorversion >= 1)
1148 return nfserr_notsupp;
1149
Chuck Leverab4684d2012-03-02 17:13:50 -05001150 READ_BUF(NFS4_VERIFIER_SIZE);
1151 COPYMEM(setclientid->se_verf.data, NFS4_VERIFIER_SIZE);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001152
J. Bruce Fieldsa084daf2011-10-10 15:07:40 -04001153 status = nfsd4_decode_opaque(argp, &setclientid->se_name);
1154 if (status)
1155 return nfserr_bad_xdr;
1156 READ_BUF(8);
J. Bruce Fields06553992014-06-02 12:32:51 -04001157 setclientid->se_callback_prog = be32_to_cpup(p++);
1158 setclientid->se_callback_netid_len = be32_to_cpup(p++);
J. Bruce Fields4aed9c42016-02-29 20:21:21 -05001159 READ_BUF(setclientid->se_callback_netid_len);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001160 SAVEMEM(setclientid->se_callback_netid_val, setclientid->se_callback_netid_len);
J. Bruce Fields4aed9c42016-02-29 20:21:21 -05001161 READ_BUF(4);
J. Bruce Fields06553992014-06-02 12:32:51 -04001162 setclientid->se_callback_addr_len = be32_to_cpup(p++);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001163
J. Bruce Fields4aed9c42016-02-29 20:21:21 -05001164 READ_BUF(setclientid->se_callback_addr_len);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001165 SAVEMEM(setclientid->se_callback_addr_val, setclientid->se_callback_addr_len);
J. Bruce Fields4aed9c42016-02-29 20:21:21 -05001166 READ_BUF(4);
J. Bruce Fields06553992014-06-02 12:32:51 -04001167 setclientid->se_callback_ident = be32_to_cpup(p++);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001168
1169 DECODE_TAIL;
1170}
1171
Al Virob37ad282006-10-19 23:28:59 -07001172static __be32
Linus Torvalds1da177e2005-04-16 15:20:36 -07001173nfsd4_decode_setclientid_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid_confirm *scd_c)
1174{
1175 DECODE_HEAD;
1176
Anna Schumakere1a90eb2013-10-30 10:00:20 -04001177 if (argp->minorversion >= 1)
1178 return nfserr_notsupp;
1179
Chuck Leverab4684d2012-03-02 17:13:50 -05001180 READ_BUF(8 + NFS4_VERIFIER_SIZE);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001181 COPYMEM(&scd_c->sc_clientid, 8);
Chuck Leverab4684d2012-03-02 17:13:50 -05001182 COPYMEM(&scd_c->sc_confirm, NFS4_VERIFIER_SIZE);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001183
1184 DECODE_TAIL;
1185}
1186
1187/* Also used for NVERIFY */
Al Virob37ad282006-10-19 23:28:59 -07001188static __be32
Linus Torvalds1da177e2005-04-16 15:20:36 -07001189nfsd4_decode_verify(struct nfsd4_compoundargs *argp, struct nfsd4_verify *verify)
1190{
Linus Torvalds1da177e2005-04-16 15:20:36 -07001191 DECODE_HEAD;
1192
1193 if ((status = nfsd4_decode_bitmap(argp, verify->ve_bmval)))
1194 goto out;
1195
1196 /* For convenience's sake, we compare raw xdr'd attributes in
J. Bruce Fieldse5f95702012-11-30 17:24:18 -05001197 * nfsd4_proc_verify */
1198
Linus Torvalds1da177e2005-04-16 15:20:36 -07001199 READ_BUF(4);
J. Bruce Fields06553992014-06-02 12:32:51 -04001200 verify->ve_attrlen = be32_to_cpup(p++);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001201 READ_BUF(verify->ve_attrlen);
1202 SAVEMEM(verify->ve_attrval, verify->ve_attrlen);
1203
1204 DECODE_TAIL;
1205}
1206
Al Virob37ad282006-10-19 23:28:59 -07001207static __be32
Linus Torvalds1da177e2005-04-16 15:20:36 -07001208nfsd4_decode_write(struct nfsd4_compoundargs *argp, struct nfsd4_write *write)
1209{
1210 int avail;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001211 int len;
1212 DECODE_HEAD;
1213
Benny Halevye31a1b62008-08-12 20:46:18 +03001214 status = nfsd4_decode_stateid(argp, &write->wr_stateid);
1215 if (status)
1216 return status;
1217 READ_BUF(16);
J. Bruce Fields542d1ab2014-06-02 12:45:31 -04001218 p = xdr_decode_hyper(p, &write->wr_offset);
J. Bruce Fields06553992014-06-02 12:32:51 -04001219 write->wr_stable_how = be32_to_cpup(p++);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001220 if (write->wr_stable_how > 2)
1221 goto xdr_error;
J. Bruce Fields06553992014-06-02 12:32:51 -04001222 write->wr_buflen = be32_to_cpup(p++);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001223
1224 /* Sorry .. no magic macros for this.. *
1225 * READ_BUF(write->wr_buflen);
1226 * SAVEMEM(write->wr_buf, write->wr_buflen);
1227 */
1228 avail = (char*)argp->end - (char*)argp->p;
1229 if (avail + argp->pagelen < write->wr_buflen) {
Chuck Lever817cb9d2007-09-11 18:01:20 -04001230 dprintk("NFSD: xdr error (%s:%d)\n",
1231 __FILE__, __LINE__);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001232 goto xdr_error;
1233 }
J. Bruce Fields70cc7f72012-11-16 14:16:46 -05001234 write->wr_head.iov_base = p;
1235 write->wr_head.iov_len = avail;
J. Bruce Fields70cc7f72012-11-16 14:16:46 -05001236 write->wr_pagelist = argp->pagelist;
J. Bruce Fields5a80a542012-11-16 10:01:30 -05001237
1238 len = XDR_QUADLEN(write->wr_buflen) << 2;
1239 if (len >= avail) {
1240 int pages;
1241
1242 len -= avail;
1243
1244 pages = len >> PAGE_SHIFT;
1245 argp->pagelist += pages;
1246 argp->pagelen -= pages * PAGE_SIZE;
1247 len -= pages * PAGE_SIZE;
1248
1249 argp->p = (__be32 *)page_address(argp->pagelist[0]);
J. Bruce Fields365da4a2013-11-19 17:32:43 -05001250 argp->pagelist++;
J. Bruce Fields5a80a542012-11-16 10:01:30 -05001251 argp->end = argp->p + XDR_QUADLEN(PAGE_SIZE);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001252 }
J. Bruce Fields5a80a542012-11-16 10:01:30 -05001253 argp->p += XDR_QUADLEN(len);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001254
1255 DECODE_TAIL;
1256}
1257
Al Virob37ad282006-10-19 23:28:59 -07001258static __be32
Linus Torvalds1da177e2005-04-16 15:20:36 -07001259nfsd4_decode_release_lockowner(struct nfsd4_compoundargs *argp, struct nfsd4_release_lockowner *rlockowner)
1260{
1261 DECODE_HEAD;
1262
Anna Schumakere1a90eb2013-10-30 10:00:20 -04001263 if (argp->minorversion >= 1)
1264 return nfserr_notsupp;
1265
Linus Torvalds1da177e2005-04-16 15:20:36 -07001266 READ_BUF(12);
1267 COPYMEM(&rlockowner->rl_clientid, sizeof(clientid_t));
J. Bruce Fields06553992014-06-02 12:32:51 -04001268 rlockowner->rl_owner.len = be32_to_cpup(p++);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001269 READ_BUF(rlockowner->rl_owner.len);
1270 READMEM(rlockowner->rl_owner.data, rlockowner->rl_owner.len);
1271
Andy Adamson60adfc52009-04-03 08:28:50 +03001272 if (argp->minorversion && !zero_clientid(&rlockowner->rl_clientid))
1273 return nfserr_inval;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001274 DECODE_TAIL;
1275}
1276
Al Virob37ad282006-10-19 23:28:59 -07001277static __be32
Andy Adamson2db134e2009-04-03 08:27:55 +03001278nfsd4_decode_exchange_id(struct nfsd4_compoundargs *argp,
Andy Adamson0733d212009-04-03 08:28:01 +03001279 struct nfsd4_exchange_id *exid)
Andy Adamson2db134e2009-04-03 08:27:55 +03001280{
Mi Jinlong5afa0402010-11-09 09:39:23 +08001281 int dummy, tmp;
Andy Adamson0733d212009-04-03 08:28:01 +03001282 DECODE_HEAD;
1283
1284 READ_BUF(NFS4_VERIFIER_SIZE);
1285 COPYMEM(exid->verifier.data, NFS4_VERIFIER_SIZE);
1286
J. Bruce Fieldsa084daf2011-10-10 15:07:40 -04001287 status = nfsd4_decode_opaque(argp, &exid->clname);
1288 if (status)
1289 return nfserr_bad_xdr;
Andy Adamson0733d212009-04-03 08:28:01 +03001290
1291 READ_BUF(4);
J. Bruce Fields06553992014-06-02 12:32:51 -04001292 exid->flags = be32_to_cpup(p++);
Andy Adamson0733d212009-04-03 08:28:01 +03001293
1294 /* Ignore state_protect4_a */
1295 READ_BUF(4);
J. Bruce Fields06553992014-06-02 12:32:51 -04001296 exid->spa_how = be32_to_cpup(p++);
Andy Adamson0733d212009-04-03 08:28:01 +03001297 switch (exid->spa_how) {
1298 case SP4_NONE:
1299 break;
1300 case SP4_MACH_CRED:
1301 /* spo_must_enforce */
1302 READ_BUF(4);
J. Bruce Fields06553992014-06-02 12:32:51 -04001303 dummy = be32_to_cpup(p++);
Andy Adamson0733d212009-04-03 08:28:01 +03001304 READ_BUF(dummy * 4);
1305 p += dummy;
1306
1307 /* spo_must_allow */
1308 READ_BUF(4);
J. Bruce Fields06553992014-06-02 12:32:51 -04001309 dummy = be32_to_cpup(p++);
Andy Adamson0733d212009-04-03 08:28:01 +03001310 READ_BUF(dummy * 4);
1311 p += dummy;
1312 break;
1313 case SP4_SSV:
1314 /* ssp_ops */
1315 READ_BUF(4);
J. Bruce Fields06553992014-06-02 12:32:51 -04001316 dummy = be32_to_cpup(p++);
Andy Adamson0733d212009-04-03 08:28:01 +03001317 READ_BUF(dummy * 4);
1318 p += dummy;
1319
1320 READ_BUF(4);
J. Bruce Fields06553992014-06-02 12:32:51 -04001321 dummy = be32_to_cpup(p++);
Andy Adamson0733d212009-04-03 08:28:01 +03001322 READ_BUF(dummy * 4);
1323 p += dummy;
1324
1325 /* ssp_hash_algs<> */
1326 READ_BUF(4);
J. Bruce Fields06553992014-06-02 12:32:51 -04001327 tmp = be32_to_cpup(p++);
Mi Jinlong5afa0402010-11-09 09:39:23 +08001328 while (tmp--) {
1329 READ_BUF(4);
J. Bruce Fields06553992014-06-02 12:32:51 -04001330 dummy = be32_to_cpup(p++);
Mi Jinlong5afa0402010-11-09 09:39:23 +08001331 READ_BUF(dummy);
1332 p += XDR_QUADLEN(dummy);
1333 }
Andy Adamson0733d212009-04-03 08:28:01 +03001334
1335 /* ssp_encr_algs<> */
1336 READ_BUF(4);
J. Bruce Fields06553992014-06-02 12:32:51 -04001337 tmp = be32_to_cpup(p++);
Mi Jinlong5afa0402010-11-09 09:39:23 +08001338 while (tmp--) {
1339 READ_BUF(4);
J. Bruce Fields06553992014-06-02 12:32:51 -04001340 dummy = be32_to_cpup(p++);
Mi Jinlong5afa0402010-11-09 09:39:23 +08001341 READ_BUF(dummy);
1342 p += XDR_QUADLEN(dummy);
1343 }
Andy Adamson0733d212009-04-03 08:28:01 +03001344
1345 /* ssp_window and ssp_num_gss_handles */
1346 READ_BUF(8);
J. Bruce Fields06553992014-06-02 12:32:51 -04001347 dummy = be32_to_cpup(p++);
1348 dummy = be32_to_cpup(p++);
Andy Adamson0733d212009-04-03 08:28:01 +03001349 break;
1350 default:
1351 goto xdr_error;
1352 }
1353
1354 /* Ignore Implementation ID */
1355 READ_BUF(4); /* nfs_impl_id4 array length */
J. Bruce Fields06553992014-06-02 12:32:51 -04001356 dummy = be32_to_cpup(p++);
Andy Adamson0733d212009-04-03 08:28:01 +03001357
1358 if (dummy > 1)
1359 goto xdr_error;
1360
1361 if (dummy == 1) {
1362 /* nii_domain */
1363 READ_BUF(4);
J. Bruce Fields06553992014-06-02 12:32:51 -04001364 dummy = be32_to_cpup(p++);
Andy Adamson0733d212009-04-03 08:28:01 +03001365 READ_BUF(dummy);
1366 p += XDR_QUADLEN(dummy);
1367
1368 /* nii_name */
1369 READ_BUF(4);
J. Bruce Fields06553992014-06-02 12:32:51 -04001370 dummy = be32_to_cpup(p++);
Andy Adamson0733d212009-04-03 08:28:01 +03001371 READ_BUF(dummy);
1372 p += XDR_QUADLEN(dummy);
1373
1374 /* nii_date */
1375 READ_BUF(12);
1376 p += 3;
1377 }
1378 DECODE_TAIL;
Andy Adamson2db134e2009-04-03 08:27:55 +03001379}
1380
1381static __be32
1382nfsd4_decode_create_session(struct nfsd4_compoundargs *argp,
1383 struct nfsd4_create_session *sess)
1384{
Andy Adamsonec6b5d72009-04-03 08:28:28 +03001385 DECODE_HEAD;
Andy Adamsonec6b5d72009-04-03 08:28:28 +03001386 u32 dummy;
Andy Adamsonec6b5d72009-04-03 08:28:28 +03001387
1388 READ_BUF(16);
1389 COPYMEM(&sess->clientid, 8);
J. Bruce Fields06553992014-06-02 12:32:51 -04001390 sess->seqid = be32_to_cpup(p++);
1391 sess->flags = be32_to_cpup(p++);
Andy Adamsonec6b5d72009-04-03 08:28:28 +03001392
1393 /* Fore channel attrs */
1394 READ_BUF(28);
J. Bruce Fields06553992014-06-02 12:32:51 -04001395 dummy = be32_to_cpup(p++); /* headerpadsz is always 0 */
1396 sess->fore_channel.maxreq_sz = be32_to_cpup(p++);
1397 sess->fore_channel.maxresp_sz = be32_to_cpup(p++);
1398 sess->fore_channel.maxresp_cached = be32_to_cpup(p++);
1399 sess->fore_channel.maxops = be32_to_cpup(p++);
1400 sess->fore_channel.maxreqs = be32_to_cpup(p++);
1401 sess->fore_channel.nr_rdma_attrs = be32_to_cpup(p++);
Andy Adamsonec6b5d72009-04-03 08:28:28 +03001402 if (sess->fore_channel.nr_rdma_attrs == 1) {
1403 READ_BUF(4);
J. Bruce Fields06553992014-06-02 12:32:51 -04001404 sess->fore_channel.rdma_attrs = be32_to_cpup(p++);
Andy Adamsonec6b5d72009-04-03 08:28:28 +03001405 } else if (sess->fore_channel.nr_rdma_attrs > 1) {
1406 dprintk("Too many fore channel attr bitmaps!\n");
1407 goto xdr_error;
1408 }
1409
1410 /* Back channel attrs */
1411 READ_BUF(28);
J. Bruce Fields06553992014-06-02 12:32:51 -04001412 dummy = be32_to_cpup(p++); /* headerpadsz is always 0 */
1413 sess->back_channel.maxreq_sz = be32_to_cpup(p++);
1414 sess->back_channel.maxresp_sz = be32_to_cpup(p++);
1415 sess->back_channel.maxresp_cached = be32_to_cpup(p++);
1416 sess->back_channel.maxops = be32_to_cpup(p++);
1417 sess->back_channel.maxreqs = be32_to_cpup(p++);
1418 sess->back_channel.nr_rdma_attrs = be32_to_cpup(p++);
Andy Adamsonec6b5d72009-04-03 08:28:28 +03001419 if (sess->back_channel.nr_rdma_attrs == 1) {
1420 READ_BUF(4);
J. Bruce Fields06553992014-06-02 12:32:51 -04001421 sess->back_channel.rdma_attrs = be32_to_cpup(p++);
Andy Adamsonec6b5d72009-04-03 08:28:28 +03001422 } else if (sess->back_channel.nr_rdma_attrs > 1) {
1423 dprintk("Too many back channel attr bitmaps!\n");
1424 goto xdr_error;
1425 }
1426
J. Bruce Fieldsacb28872012-03-27 14:50:26 -04001427 READ_BUF(4);
J. Bruce Fields06553992014-06-02 12:32:51 -04001428 sess->callback_prog = be32_to_cpup(p++);
J. Bruce Fieldsacb28872012-03-27 14:50:26 -04001429 nfsd4_decode_cb_sec(argp, &sess->cb_sec);
Andy Adamsonec6b5d72009-04-03 08:28:28 +03001430 DECODE_TAIL;
Andy Adamson2db134e2009-04-03 08:27:55 +03001431}
1432
1433static __be32
1434nfsd4_decode_destroy_session(struct nfsd4_compoundargs *argp,
1435 struct nfsd4_destroy_session *destroy_session)
1436{
Benny Halevye10e0cf2009-04-03 08:28:38 +03001437 DECODE_HEAD;
1438 READ_BUF(NFS4_MAX_SESSIONID_LEN);
1439 COPYMEM(destroy_session->sessionid.data, NFS4_MAX_SESSIONID_LEN);
1440
1441 DECODE_TAIL;
Andy Adamson2db134e2009-04-03 08:27:55 +03001442}
1443
1444static __be32
Bryan Schumakere1ca12d2011-07-13 11:04:21 -04001445nfsd4_decode_free_stateid(struct nfsd4_compoundargs *argp,
1446 struct nfsd4_free_stateid *free_stateid)
1447{
1448 DECODE_HEAD;
1449
1450 READ_BUF(sizeof(stateid_t));
J. Bruce Fields06553992014-06-02 12:32:51 -04001451 free_stateid->fr_stateid.si_generation = be32_to_cpup(p++);
Bryan Schumakere1ca12d2011-07-13 11:04:21 -04001452 COPYMEM(&free_stateid->fr_stateid.si_opaque, sizeof(stateid_opaque_t));
1453
1454 DECODE_TAIL;
1455}
1456
1457static __be32
Andy Adamson2db134e2009-04-03 08:27:55 +03001458nfsd4_decode_sequence(struct nfsd4_compoundargs *argp,
1459 struct nfsd4_sequence *seq)
1460{
Benny Halevyb85d4c02009-04-03 08:28:08 +03001461 DECODE_HEAD;
1462
1463 READ_BUF(NFS4_MAX_SESSIONID_LEN + 16);
1464 COPYMEM(seq->sessionid.data, NFS4_MAX_SESSIONID_LEN);
J. Bruce Fields06553992014-06-02 12:32:51 -04001465 seq->seqid = be32_to_cpup(p++);
1466 seq->slotid = be32_to_cpup(p++);
1467 seq->maxslots = be32_to_cpup(p++);
1468 seq->cachethis = be32_to_cpup(p++);
Benny Halevyb85d4c02009-04-03 08:28:08 +03001469
1470 DECODE_TAIL;
Andy Adamson2db134e2009-04-03 08:27:55 +03001471}
1472
Bryan Schumaker17456802011-07-13 10:50:48 -04001473static __be32
1474nfsd4_decode_test_stateid(struct nfsd4_compoundargs *argp, struct nfsd4_test_stateid *test_stateid)
1475{
Bryan Schumaker17456802011-07-13 10:50:48 -04001476 int i;
Bryan Schumaker03cfb422012-01-27 10:22:49 -05001477 __be32 *p, status;
1478 struct nfsd4_test_stateid_id *stateid;
Bryan Schumaker17456802011-07-13 10:50:48 -04001479
1480 READ_BUF(4);
1481 test_stateid->ts_num_ids = ntohl(*p++);
1482
Bryan Schumaker03cfb422012-01-27 10:22:49 -05001483 INIT_LIST_HEAD(&test_stateid->ts_stateid_list);
Bryan Schumaker17456802011-07-13 10:50:48 -04001484
1485 for (i = 0; i < test_stateid->ts_num_ids; i++) {
J. Bruce Fieldsd5e23382014-06-24 17:43:45 -04001486 stateid = svcxdr_tmpalloc(argp, sizeof(*stateid));
Bryan Schumaker03cfb422012-01-27 10:22:49 -05001487 if (!stateid) {
Al Viroafcf6792012-04-13 00:15:37 -04001488 status = nfserrno(-ENOMEM);
Bryan Schumaker03cfb422012-01-27 10:22:49 -05001489 goto out;
1490 }
1491
Bryan Schumaker03cfb422012-01-27 10:22:49 -05001492 INIT_LIST_HEAD(&stateid->ts_id_list);
1493 list_add_tail(&stateid->ts_id_list, &test_stateid->ts_stateid_list);
1494
1495 status = nfsd4_decode_stateid(argp, &stateid->ts_id_stateid);
Bryan Schumaker17456802011-07-13 10:50:48 -04001496 if (status)
Bryan Schumaker03cfb422012-01-27 10:22:49 -05001497 goto out;
Bryan Schumaker17456802011-07-13 10:50:48 -04001498 }
1499
1500 status = 0;
1501out:
1502 return status;
1503xdr_error:
1504 dprintk("NFSD: xdr error (%s:%d)\n", __FILE__, __LINE__);
1505 status = nfserr_bad_xdr;
1506 goto out;
1507}
1508
Mi Jinlong345c2842011-10-20 17:51:39 +08001509static __be32 nfsd4_decode_destroy_clientid(struct nfsd4_compoundargs *argp, struct nfsd4_destroy_clientid *dc)
1510{
1511 DECODE_HEAD;
1512
1513 READ_BUF(8);
1514 COPYMEM(&dc->clientid, 8);
1515
1516 DECODE_TAIL;
1517}
1518
J. Bruce Fields4dc6ec02010-04-19 15:11:28 -04001519static __be32 nfsd4_decode_reclaim_complete(struct nfsd4_compoundargs *argp, struct nfsd4_reclaim_complete *rc)
1520{
1521 DECODE_HEAD;
1522
1523 READ_BUF(4);
J. Bruce Fields06553992014-06-02 12:32:51 -04001524 rc->rca_one_fs = be32_to_cpup(p++);
J. Bruce Fields4dc6ec02010-04-19 15:11:28 -04001525
1526 DECODE_TAIL;
1527}
1528
Christoph Hellwig9cf514c2014-05-05 13:11:59 +02001529#ifdef CONFIG_NFSD_PNFS
1530static __be32
1531nfsd4_decode_getdeviceinfo(struct nfsd4_compoundargs *argp,
1532 struct nfsd4_getdeviceinfo *gdev)
1533{
1534 DECODE_HEAD;
1535 u32 num, i;
1536
1537 READ_BUF(sizeof(struct nfsd4_deviceid) + 3 * 4);
1538 COPYMEM(&gdev->gd_devid, sizeof(struct nfsd4_deviceid));
1539 gdev->gd_layout_type = be32_to_cpup(p++);
1540 gdev->gd_maxcount = be32_to_cpup(p++);
1541 num = be32_to_cpup(p++);
1542 if (num) {
1543 READ_BUF(4 * num);
1544 gdev->gd_notify_types = be32_to_cpup(p++);
1545 for (i = 1; i < num; i++) {
1546 if (be32_to_cpup(p++)) {
1547 status = nfserr_inval;
1548 goto out;
1549 }
1550 }
1551 }
1552 DECODE_TAIL;
1553}
1554
1555static __be32
1556nfsd4_decode_layoutget(struct nfsd4_compoundargs *argp,
1557 struct nfsd4_layoutget *lgp)
1558{
1559 DECODE_HEAD;
1560
1561 READ_BUF(36);
1562 lgp->lg_signal = be32_to_cpup(p++);
1563 lgp->lg_layout_type = be32_to_cpup(p++);
1564 lgp->lg_seg.iomode = be32_to_cpup(p++);
1565 p = xdr_decode_hyper(p, &lgp->lg_seg.offset);
1566 p = xdr_decode_hyper(p, &lgp->lg_seg.length);
1567 p = xdr_decode_hyper(p, &lgp->lg_minlength);
Kinglong Meedb59c0e2015-03-19 19:04:41 +08001568
1569 status = nfsd4_decode_stateid(argp, &lgp->lg_sid);
1570 if (status)
1571 return status;
1572
Christoph Hellwig9cf514c2014-05-05 13:11:59 +02001573 READ_BUF(4);
1574 lgp->lg_maxcount = be32_to_cpup(p++);
1575
1576 DECODE_TAIL;
1577}
1578
1579static __be32
1580nfsd4_decode_layoutcommit(struct nfsd4_compoundargs *argp,
1581 struct nfsd4_layoutcommit *lcp)
1582{
1583 DECODE_HEAD;
1584 u32 timechange;
1585
1586 READ_BUF(20);
1587 p = xdr_decode_hyper(p, &lcp->lc_seg.offset);
1588 p = xdr_decode_hyper(p, &lcp->lc_seg.length);
1589 lcp->lc_reclaim = be32_to_cpup(p++);
Kinglong Meedb59c0e2015-03-19 19:04:41 +08001590
1591 status = nfsd4_decode_stateid(argp, &lcp->lc_sid);
1592 if (status)
1593 return status;
1594
Christoph Hellwig9cf514c2014-05-05 13:11:59 +02001595 READ_BUF(4);
1596 lcp->lc_newoffset = be32_to_cpup(p++);
1597 if (lcp->lc_newoffset) {
1598 READ_BUF(8);
1599 p = xdr_decode_hyper(p, &lcp->lc_last_wr);
1600 } else
1601 lcp->lc_last_wr = 0;
1602 READ_BUF(4);
1603 timechange = be32_to_cpup(p++);
1604 if (timechange) {
1605 status = nfsd4_decode_time(argp, &lcp->lc_mtime);
1606 if (status)
1607 return status;
1608 } else {
1609 lcp->lc_mtime.tv_nsec = UTIME_NOW;
1610 }
1611 READ_BUF(8);
1612 lcp->lc_layout_type = be32_to_cpup(p++);
1613
1614 /*
1615 * Save the layout update in XDR format and let the layout driver deal
1616 * with it later.
1617 */
1618 lcp->lc_up_len = be32_to_cpup(p++);
1619 if (lcp->lc_up_len > 0) {
1620 READ_BUF(lcp->lc_up_len);
1621 READMEM(lcp->lc_up_layout, lcp->lc_up_len);
1622 }
1623
1624 DECODE_TAIL;
1625}
1626
1627static __be32
1628nfsd4_decode_layoutreturn(struct nfsd4_compoundargs *argp,
1629 struct nfsd4_layoutreturn *lrp)
1630{
1631 DECODE_HEAD;
1632
1633 READ_BUF(16);
1634 lrp->lr_reclaim = be32_to_cpup(p++);
1635 lrp->lr_layout_type = be32_to_cpup(p++);
1636 lrp->lr_seg.iomode = be32_to_cpup(p++);
1637 lrp->lr_return_type = be32_to_cpup(p++);
1638 if (lrp->lr_return_type == RETURN_FILE) {
1639 READ_BUF(16);
1640 p = xdr_decode_hyper(p, &lrp->lr_seg.offset);
1641 p = xdr_decode_hyper(p, &lrp->lr_seg.length);
Kinglong Meedb59c0e2015-03-19 19:04:41 +08001642
1643 status = nfsd4_decode_stateid(argp, &lrp->lr_sid);
1644 if (status)
1645 return status;
1646
Christoph Hellwig9cf514c2014-05-05 13:11:59 +02001647 READ_BUF(4);
1648 lrp->lrf_body_len = be32_to_cpup(p++);
1649 if (lrp->lrf_body_len > 0) {
1650 READ_BUF(lrp->lrf_body_len);
1651 READMEM(lrp->lrf_body, lrp->lrf_body_len);
1652 }
1653 } else {
1654 lrp->lr_seg.offset = 0;
1655 lrp->lr_seg.length = NFS4_MAX_UINT64;
1656 }
1657
1658 DECODE_TAIL;
1659}
1660#endif /* CONFIG_NFSD_PNFS */
1661
Andy Adamson2db134e2009-04-03 08:27:55 +03001662static __be32
Anna Schumaker95d871f2014-11-07 14:44:26 -05001663nfsd4_decode_fallocate(struct nfsd4_compoundargs *argp,
1664 struct nfsd4_fallocate *fallocate)
1665{
1666 DECODE_HEAD;
1667
1668 status = nfsd4_decode_stateid(argp, &fallocate->falloc_stateid);
1669 if (status)
1670 return status;
1671
1672 READ_BUF(16);
1673 p = xdr_decode_hyper(p, &fallocate->falloc_offset);
1674 xdr_decode_hyper(p, &fallocate->falloc_length);
1675
1676 DECODE_TAIL;
1677}
1678
1679static __be32
Christoph Hellwigffa01602015-12-03 12:59:52 +01001680nfsd4_decode_clone(struct nfsd4_compoundargs *argp, struct nfsd4_clone *clone)
1681{
1682 DECODE_HEAD;
1683
1684 status = nfsd4_decode_stateid(argp, &clone->cl_src_stateid);
1685 if (status)
1686 return status;
1687 status = nfsd4_decode_stateid(argp, &clone->cl_dst_stateid);
1688 if (status)
1689 return status;
1690
1691 READ_BUF(8 + 8 + 8);
1692 p = xdr_decode_hyper(p, &clone->cl_src_pos);
1693 p = xdr_decode_hyper(p, &clone->cl_dst_pos);
1694 p = xdr_decode_hyper(p, &clone->cl_count);
1695 DECODE_TAIL;
1696}
1697
1698static __be32
Anna Schumaker24bab492014-09-26 13:58:27 -04001699nfsd4_decode_seek(struct nfsd4_compoundargs *argp, struct nfsd4_seek *seek)
1700{
1701 DECODE_HEAD;
1702
1703 status = nfsd4_decode_stateid(argp, &seek->seek_stateid);
1704 if (status)
1705 return status;
1706
1707 READ_BUF(8 + 4);
1708 p = xdr_decode_hyper(p, &seek->seek_offset);
1709 seek->seek_whence = be32_to_cpup(p);
1710
1711 DECODE_TAIL;
1712}
1713
1714static __be32
Benny Halevy347e0ad2008-07-02 11:13:41 +03001715nfsd4_decode_noop(struct nfsd4_compoundargs *argp, void *p)
1716{
1717 return nfs_ok;
1718}
1719
Benny Halevy3c375c62008-07-02 11:14:01 +03001720static __be32
1721nfsd4_decode_notsupp(struct nfsd4_compoundargs *argp, void *p)
1722{
Benny Halevy1e685ec2009-03-04 23:06:06 +02001723 return nfserr_notsupp;
Benny Halevy3c375c62008-07-02 11:14:01 +03001724}
1725
Benny Halevy347e0ad2008-07-02 11:13:41 +03001726typedef __be32(*nfsd4_dec)(struct nfsd4_compoundargs *argp, void *);
1727
1728static nfsd4_dec nfsd4_dec_ops[] = {
J. Bruce Fieldsad1060c2008-07-18 15:04:16 -04001729 [OP_ACCESS] = (nfsd4_dec)nfsd4_decode_access,
1730 [OP_CLOSE] = (nfsd4_dec)nfsd4_decode_close,
1731 [OP_COMMIT] = (nfsd4_dec)nfsd4_decode_commit,
1732 [OP_CREATE] = (nfsd4_dec)nfsd4_decode_create,
1733 [OP_DELEGPURGE] = (nfsd4_dec)nfsd4_decode_notsupp,
1734 [OP_DELEGRETURN] = (nfsd4_dec)nfsd4_decode_delegreturn,
1735 [OP_GETATTR] = (nfsd4_dec)nfsd4_decode_getattr,
1736 [OP_GETFH] = (nfsd4_dec)nfsd4_decode_noop,
1737 [OP_LINK] = (nfsd4_dec)nfsd4_decode_link,
1738 [OP_LOCK] = (nfsd4_dec)nfsd4_decode_lock,
1739 [OP_LOCKT] = (nfsd4_dec)nfsd4_decode_lockt,
1740 [OP_LOCKU] = (nfsd4_dec)nfsd4_decode_locku,
1741 [OP_LOOKUP] = (nfsd4_dec)nfsd4_decode_lookup,
1742 [OP_LOOKUPP] = (nfsd4_dec)nfsd4_decode_noop,
1743 [OP_NVERIFY] = (nfsd4_dec)nfsd4_decode_verify,
1744 [OP_OPEN] = (nfsd4_dec)nfsd4_decode_open,
1745 [OP_OPENATTR] = (nfsd4_dec)nfsd4_decode_notsupp,
1746 [OP_OPEN_CONFIRM] = (nfsd4_dec)nfsd4_decode_open_confirm,
1747 [OP_OPEN_DOWNGRADE] = (nfsd4_dec)nfsd4_decode_open_downgrade,
1748 [OP_PUTFH] = (nfsd4_dec)nfsd4_decode_putfh,
Anna Schumakere1a90eb2013-10-30 10:00:20 -04001749 [OP_PUTPUBFH] = (nfsd4_dec)nfsd4_decode_putpubfh,
J. Bruce Fieldsad1060c2008-07-18 15:04:16 -04001750 [OP_PUTROOTFH] = (nfsd4_dec)nfsd4_decode_noop,
1751 [OP_READ] = (nfsd4_dec)nfsd4_decode_read,
1752 [OP_READDIR] = (nfsd4_dec)nfsd4_decode_readdir,
1753 [OP_READLINK] = (nfsd4_dec)nfsd4_decode_noop,
1754 [OP_REMOVE] = (nfsd4_dec)nfsd4_decode_remove,
1755 [OP_RENAME] = (nfsd4_dec)nfsd4_decode_rename,
1756 [OP_RENEW] = (nfsd4_dec)nfsd4_decode_renew,
1757 [OP_RESTOREFH] = (nfsd4_dec)nfsd4_decode_noop,
1758 [OP_SAVEFH] = (nfsd4_dec)nfsd4_decode_noop,
1759 [OP_SECINFO] = (nfsd4_dec)nfsd4_decode_secinfo,
1760 [OP_SETATTR] = (nfsd4_dec)nfsd4_decode_setattr,
1761 [OP_SETCLIENTID] = (nfsd4_dec)nfsd4_decode_setclientid,
1762 [OP_SETCLIENTID_CONFIRM] = (nfsd4_dec)nfsd4_decode_setclientid_confirm,
1763 [OP_VERIFY] = (nfsd4_dec)nfsd4_decode_verify,
1764 [OP_WRITE] = (nfsd4_dec)nfsd4_decode_write,
1765 [OP_RELEASE_LOCKOWNER] = (nfsd4_dec)nfsd4_decode_release_lockowner,
Andy Adamson2db134e2009-04-03 08:27:55 +03001766
1767 /* new operations for NFSv4.1 */
J. Bruce Fieldscb73a9f2012-11-01 18:09:48 -04001768 [OP_BACKCHANNEL_CTL] = (nfsd4_dec)nfsd4_decode_backchannel_ctl,
J. Bruce Fields1d1bc8f2010-10-04 23:12:59 -04001769 [OP_BIND_CONN_TO_SESSION]= (nfsd4_dec)nfsd4_decode_bind_conn_to_session,
Randy Dunlap9064caa2009-04-28 16:48:25 -07001770 [OP_EXCHANGE_ID] = (nfsd4_dec)nfsd4_decode_exchange_id,
1771 [OP_CREATE_SESSION] = (nfsd4_dec)nfsd4_decode_create_session,
1772 [OP_DESTROY_SESSION] = (nfsd4_dec)nfsd4_decode_destroy_session,
Bryan Schumakere1ca12d2011-07-13 11:04:21 -04001773 [OP_FREE_STATEID] = (nfsd4_dec)nfsd4_decode_free_stateid,
Randy Dunlap9064caa2009-04-28 16:48:25 -07001774 [OP_GET_DIR_DELEGATION] = (nfsd4_dec)nfsd4_decode_notsupp,
Christoph Hellwig9cf514c2014-05-05 13:11:59 +02001775#ifdef CONFIG_NFSD_PNFS
1776 [OP_GETDEVICEINFO] = (nfsd4_dec)nfsd4_decode_getdeviceinfo,
1777 [OP_GETDEVICELIST] = (nfsd4_dec)nfsd4_decode_notsupp,
1778 [OP_LAYOUTCOMMIT] = (nfsd4_dec)nfsd4_decode_layoutcommit,
1779 [OP_LAYOUTGET] = (nfsd4_dec)nfsd4_decode_layoutget,
1780 [OP_LAYOUTRETURN] = (nfsd4_dec)nfsd4_decode_layoutreturn,
1781#else
Randy Dunlap9064caa2009-04-28 16:48:25 -07001782 [OP_GETDEVICEINFO] = (nfsd4_dec)nfsd4_decode_notsupp,
1783 [OP_GETDEVICELIST] = (nfsd4_dec)nfsd4_decode_notsupp,
1784 [OP_LAYOUTCOMMIT] = (nfsd4_dec)nfsd4_decode_notsupp,
1785 [OP_LAYOUTGET] = (nfsd4_dec)nfsd4_decode_notsupp,
1786 [OP_LAYOUTRETURN] = (nfsd4_dec)nfsd4_decode_notsupp,
Christoph Hellwig9cf514c2014-05-05 13:11:59 +02001787#endif
J. Bruce Fields04f4ad12010-12-16 09:51:13 -05001788 [OP_SECINFO_NO_NAME] = (nfsd4_dec)nfsd4_decode_secinfo_no_name,
Randy Dunlap9064caa2009-04-28 16:48:25 -07001789 [OP_SEQUENCE] = (nfsd4_dec)nfsd4_decode_sequence,
1790 [OP_SET_SSV] = (nfsd4_dec)nfsd4_decode_notsupp,
Bryan Schumaker17456802011-07-13 10:50:48 -04001791 [OP_TEST_STATEID] = (nfsd4_dec)nfsd4_decode_test_stateid,
Randy Dunlap9064caa2009-04-28 16:48:25 -07001792 [OP_WANT_DELEGATION] = (nfsd4_dec)nfsd4_decode_notsupp,
Mi Jinlong345c2842011-10-20 17:51:39 +08001793 [OP_DESTROY_CLIENTID] = (nfsd4_dec)nfsd4_decode_destroy_clientid,
J. Bruce Fields4dc6ec02010-04-19 15:11:28 -04001794 [OP_RECLAIM_COMPLETE] = (nfsd4_dec)nfsd4_decode_reclaim_complete,
Anna Schumaker87a15a82014-09-26 13:58:26 -04001795
1796 /* new operations for NFSv4.2 */
Anna Schumaker95d871f2014-11-07 14:44:26 -05001797 [OP_ALLOCATE] = (nfsd4_dec)nfsd4_decode_fallocate,
Anna Schumaker87a15a82014-09-26 13:58:26 -04001798 [OP_COPY] = (nfsd4_dec)nfsd4_decode_notsupp,
1799 [OP_COPY_NOTIFY] = (nfsd4_dec)nfsd4_decode_notsupp,
Anna Schumakerb0cb9082014-11-07 14:44:27 -05001800 [OP_DEALLOCATE] = (nfsd4_dec)nfsd4_decode_fallocate,
Anna Schumaker87a15a82014-09-26 13:58:26 -04001801 [OP_IO_ADVISE] = (nfsd4_dec)nfsd4_decode_notsupp,
1802 [OP_LAYOUTERROR] = (nfsd4_dec)nfsd4_decode_notsupp,
1803 [OP_LAYOUTSTATS] = (nfsd4_dec)nfsd4_decode_notsupp,
1804 [OP_OFFLOAD_CANCEL] = (nfsd4_dec)nfsd4_decode_notsupp,
1805 [OP_OFFLOAD_STATUS] = (nfsd4_dec)nfsd4_decode_notsupp,
1806 [OP_READ_PLUS] = (nfsd4_dec)nfsd4_decode_notsupp,
Anna Schumaker24bab492014-09-26 13:58:27 -04001807 [OP_SEEK] = (nfsd4_dec)nfsd4_decode_seek,
Anna Schumaker87a15a82014-09-26 13:58:26 -04001808 [OP_WRITE_SAME] = (nfsd4_dec)nfsd4_decode_notsupp,
Christoph Hellwigffa01602015-12-03 12:59:52 +01001809 [OP_CLONE] = (nfsd4_dec)nfsd4_decode_clone,
Andy Adamson2db134e2009-04-03 08:27:55 +03001810};
1811
Anna Schumakere1a90eb2013-10-30 10:00:20 -04001812static inline bool
1813nfsd4_opnum_in_range(struct nfsd4_compoundargs *argp, struct nfsd4_op *op)
1814{
Anna Schumaker8217d142013-10-30 13:38:13 -04001815 if (op->opnum < FIRST_NFS4_OP)
Anna Schumakere1a90eb2013-10-30 10:00:20 -04001816 return false;
Anna Schumaker8217d142013-10-30 13:38:13 -04001817 else if (argp->minorversion == 0 && op->opnum > LAST_NFS40_OP)
Anna Schumakere1a90eb2013-10-30 10:00:20 -04001818 return false;
Anna Schumaker8217d142013-10-30 13:38:13 -04001819 else if (argp->minorversion == 1 && op->opnum > LAST_NFS41_OP)
1820 return false;
1821 else if (argp->minorversion == 2 && op->opnum > LAST_NFS42_OP)
Anna Schumakere1a90eb2013-10-30 10:00:20 -04001822 return false;
1823 return true;
1824}
Benny Halevyf2feb962008-07-02 11:14:22 +03001825
Benny Halevy347e0ad2008-07-02 11:13:41 +03001826static __be32
Linus Torvalds1da177e2005-04-16 15:20:36 -07001827nfsd4_decode_compound(struct nfsd4_compoundargs *argp)
1828{
1829 DECODE_HEAD;
1830 struct nfsd4_op *op;
J. Bruce Fields10910062011-01-24 12:11:02 -05001831 bool cachethis = false;
J. Bruce Fieldsa5cddc82014-05-12 18:10:58 -04001832 int auth_slack= argp->rqstp->rq_auth_slack;
1833 int max_reply = auth_slack + 8; /* opcnt, status */
J. Bruce Fieldsb0e35fd2014-02-04 10:36:59 -05001834 int readcount = 0;
1835 int readbytes = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001836 int i;
1837
Linus Torvalds1da177e2005-04-16 15:20:36 -07001838 READ_BUF(4);
J. Bruce Fields06553992014-06-02 12:32:51 -04001839 argp->taglen = be32_to_cpup(p++);
J. Bruce Fields4aed9c42016-02-29 20:21:21 -05001840 READ_BUF(argp->taglen);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001841 SAVEMEM(argp->tag, argp->taglen);
J. Bruce Fields4aed9c42016-02-29 20:21:21 -05001842 READ_BUF(8);
J. Bruce Fields06553992014-06-02 12:32:51 -04001843 argp->minorversion = be32_to_cpup(p++);
1844 argp->opcnt = be32_to_cpup(p++);
J. Bruce Fields4f0cefb2014-03-11 15:39:13 -04001845 max_reply += 4 + (XDR_QUADLEN(argp->taglen) << 2);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001846
1847 if (argp->taglen > NFSD4_MAX_TAGLEN)
1848 goto xdr_error;
1849 if (argp->opcnt > 100)
1850 goto xdr_error;
1851
Tobias Klausere8c96f82006-03-24 03:15:34 -08001852 if (argp->opcnt > ARRAY_SIZE(argp->iops)) {
J. Bruce Fields5d6031c2014-07-17 16:20:39 -04001853 argp->ops = kzalloc(argp->opcnt * sizeof(*argp->ops), GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001854 if (!argp->ops) {
1855 argp->ops = argp->iops;
Chuck Lever817cb9d2007-09-11 18:01:20 -04001856 dprintk("nfsd: couldn't allocate room for COMPOUND\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001857 goto xdr_error;
1858 }
1859 }
1860
Anna Schumakere1a90eb2013-10-30 10:00:20 -04001861 if (argp->minorversion > NFSD_SUPPORTED_MINOR_VERSION)
Benny Halevy30cff1f2008-07-02 11:13:18 +03001862 argp->opcnt = 0;
1863
Linus Torvalds1da177e2005-04-16 15:20:36 -07001864 for (i = 0; i < argp->opcnt; i++) {
1865 op = &argp->ops[i];
1866 op->replay = NULL;
1867
J. Bruce Fields8a61b182012-11-16 22:28:38 -05001868 READ_BUF(4);
J. Bruce Fields06553992014-06-02 12:32:51 -04001869 op->opnum = be32_to_cpup(p++);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001870
Anna Schumakere1a90eb2013-10-30 10:00:20 -04001871 if (nfsd4_opnum_in_range(argp, op))
1872 op->status = nfsd4_dec_ops[op->opnum](argp, &op->u);
Benny Halevy347e0ad2008-07-02 11:13:41 +03001873 else {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001874 op->opnum = OP_ILLEGAL;
1875 op->status = nfserr_op_illegal;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001876 }
J. Bruce Fields10910062011-01-24 12:11:02 -05001877 /*
1878 * We'll try to cache the result in the DRC if any one
1879 * op in the compound wants to be cached:
1880 */
1881 cachethis |= nfsd4_cache_this_op(op);
J. Bruce Fields6ff40de2013-11-05 15:07:16 -05001882
J. Bruce Fieldsb0e35fd2014-02-04 10:36:59 -05001883 if (op->opnum == OP_READ) {
1884 readcount++;
1885 readbytes += nfsd4_max_reply(argp->rqstp, op);
1886 } else
1887 max_reply += nfsd4_max_reply(argp->rqstp, op);
J. Bruce Fieldsf7b43d02014-08-12 11:41:40 -04001888 /*
1889 * OP_LOCK may return a conflicting lock. (Special case
1890 * because it will just skip encoding this if it runs
1891 * out of xdr buffer space, and it is the only operation
1892 * that behaves this way.)
1893 */
1894 if (op->opnum == OP_LOCK)
1895 max_reply += NFS4_OPAQUE_LIMIT;
J. Bruce Fieldse372ba62014-05-19 12:27:11 -04001896
1897 if (op->status) {
1898 argp->opcnt = i+1;
1899 break;
1900 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001901 }
J. Bruce Fields10910062011-01-24 12:11:02 -05001902 /* Sessions make the DRC unnecessary: */
1903 if (argp->minorversion)
1904 cachethis = false;
J. Bruce Fieldsb0e35fd2014-02-04 10:36:59 -05001905 svc_reserve(argp->rqstp, max_reply + readbytes);
J. Bruce Fields10910062011-01-24 12:11:02 -05001906 argp->rqstp->rq_cachetype = cachethis ? RC_REPLBUFF : RC_NOCACHE;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001907
J. Bruce Fieldsa5cddc82014-05-12 18:10:58 -04001908 if (readcount > 1 || max_reply > PAGE_SIZE - auth_slack)
Jeff Layton779fb0f2014-11-19 07:51:18 -05001909 clear_bit(RQ_SPLICE_OK, &argp->rqstp->rq_flags);
J. Bruce Fieldsb0e35fd2014-02-04 10:36:59 -05001910
Linus Torvalds1da177e2005-04-16 15:20:36 -07001911 DECODE_TAIL;
1912}
Linus Torvalds1da177e2005-04-16 15:20:36 -07001913
J. Bruce Fieldsd05d5742014-03-22 18:48:39 -04001914static __be32 *encode_change(__be32 *p, struct kstat *stat, struct inode *inode)
J. Bruce Fieldsc654b8a2009-04-16 17:33:25 -04001915{
1916 if (IS_I_VERSION(inode)) {
J. Bruce Fieldsd05d5742014-03-22 18:48:39 -04001917 p = xdr_encode_hyper(p, inode->i_version);
J. Bruce Fieldsc654b8a2009-04-16 17:33:25 -04001918 } else {
J. Bruce Fieldsd05d5742014-03-22 18:48:39 -04001919 *p++ = cpu_to_be32(stat->ctime.tv_sec);
1920 *p++ = cpu_to_be32(stat->ctime.tv_nsec);
J. Bruce Fieldsc654b8a2009-04-16 17:33:25 -04001921 }
J. Bruce Fieldsd05d5742014-03-22 18:48:39 -04001922 return p;
J. Bruce Fieldsc654b8a2009-04-16 17:33:25 -04001923}
1924
J. Bruce Fieldsd05d5742014-03-22 18:48:39 -04001925static __be32 *encode_cinfo(__be32 *p, struct nfsd4_change_info *c)
J. Bruce Fieldsc654b8a2009-04-16 17:33:25 -04001926{
J. Bruce Fieldsd05d5742014-03-22 18:48:39 -04001927 *p++ = cpu_to_be32(c->atomic);
J. Bruce Fieldsc654b8a2009-04-16 17:33:25 -04001928 if (c->change_supported) {
J. Bruce Fieldsd05d5742014-03-22 18:48:39 -04001929 p = xdr_encode_hyper(p, c->before_change);
1930 p = xdr_encode_hyper(p, c->after_change);
J. Bruce Fieldsc654b8a2009-04-16 17:33:25 -04001931 } else {
J. Bruce Fieldsd05d5742014-03-22 18:48:39 -04001932 *p++ = cpu_to_be32(c->before_ctime_sec);
1933 *p++ = cpu_to_be32(c->before_ctime_nsec);
1934 *p++ = cpu_to_be32(c->after_ctime_sec);
1935 *p++ = cpu_to_be32(c->after_ctime_nsec);
J. Bruce Fieldsc654b8a2009-04-16 17:33:25 -04001936 }
J. Bruce Fieldsd05d5742014-03-22 18:48:39 -04001937 return p;
J. Bruce Fieldsc654b8a2009-04-16 17:33:25 -04001938}
Linus Torvalds1da177e2005-04-16 15:20:36 -07001939
J.Bruce Fields81c3f412006-10-04 02:16:19 -07001940/* Encode as an array of strings the string given with components
Weston Andros Adamsone7a04442012-04-24 11:07:59 -04001941 * separated @sep, escaped with esc_enter and esc_exit.
J.Bruce Fields81c3f412006-10-04 02:16:19 -07001942 */
J. Bruce Fieldsddd1ea52013-08-27 21:32:25 -04001943static __be32 nfsd4_encode_components_esc(struct xdr_stream *xdr, char sep,
1944 char *components, char esc_enter,
1945 char esc_exit)
J.Bruce Fields81c3f412006-10-04 02:16:19 -07001946{
J. Bruce Fieldsddd1ea52013-08-27 21:32:25 -04001947 __be32 *p;
J. Bruce Fields082d4bd2013-08-29 15:42:52 -04001948 __be32 pathlen;
1949 int pathlen_offset;
J.Bruce Fields81c3f412006-10-04 02:16:19 -07001950 int strlen, count=0;
Weston Andros Adamsone7a04442012-04-24 11:07:59 -04001951 char *str, *end, *next;
J.Bruce Fields81c3f412006-10-04 02:16:19 -07001952
1953 dprintk("nfsd4_encode_components(%s)\n", components);
J. Bruce Fields082d4bd2013-08-29 15:42:52 -04001954
1955 pathlen_offset = xdr->buf->len;
J. Bruce Fieldsddd1ea52013-08-27 21:32:25 -04001956 p = xdr_reserve_space(xdr, 4);
1957 if (!p)
J.Bruce Fields81c3f412006-10-04 02:16:19 -07001958 return nfserr_resource;
J. Bruce Fields082d4bd2013-08-29 15:42:52 -04001959 p++; /* We will fill this in with @count later */
1960
J.Bruce Fields81c3f412006-10-04 02:16:19 -07001961 end = str = components;
1962 while (*end) {
Weston Andros Adamsone7a04442012-04-24 11:07:59 -04001963 bool found_esc = false;
1964
1965 /* try to parse as esc_start, ..., esc_end, sep */
1966 if (*str == esc_enter) {
1967 for (; *end && (*end != esc_exit); end++)
1968 /* find esc_exit or end of string */;
1969 next = end + 1;
1970 if (*end && (!*next || *next == sep)) {
1971 str++;
1972 found_esc = true;
1973 }
1974 }
1975
1976 if (!found_esc)
1977 for (; *end && (*end != sep); end++)
1978 /* find sep or end of string */;
1979
J.Bruce Fields81c3f412006-10-04 02:16:19 -07001980 strlen = end - str;
1981 if (strlen) {
J. Bruce Fieldsddd1ea52013-08-27 21:32:25 -04001982 p = xdr_reserve_space(xdr, strlen + 4);
1983 if (!p)
J.Bruce Fields81c3f412006-10-04 02:16:19 -07001984 return nfserr_resource;
J. Bruce Fields0c0c2672014-03-22 18:43:16 -04001985 p = xdr_encode_opaque(p, str, strlen);
J.Bruce Fields81c3f412006-10-04 02:16:19 -07001986 count++;
1987 }
1988 else
1989 end++;
Benjamin Coddington5a64e562014-12-07 16:05:47 -05001990 if (found_esc)
1991 end = next;
1992
J.Bruce Fields81c3f412006-10-04 02:16:19 -07001993 str = end;
1994 }
Benjamin Coddingtonbf7491f2014-12-07 16:05:48 -05001995 pathlen = htonl(count);
J. Bruce Fields082d4bd2013-08-29 15:42:52 -04001996 write_bytes_to_xdr_buf(xdr->buf, pathlen_offset, &pathlen, 4);
J.Bruce Fields81c3f412006-10-04 02:16:19 -07001997 return 0;
1998}
1999
Weston Andros Adamsone7a04442012-04-24 11:07:59 -04002000/* Encode as an array of strings the string given with components
2001 * separated @sep.
2002 */
J. Bruce Fieldsddd1ea52013-08-27 21:32:25 -04002003static __be32 nfsd4_encode_components(struct xdr_stream *xdr, char sep,
2004 char *components)
Weston Andros Adamsone7a04442012-04-24 11:07:59 -04002005{
J. Bruce Fieldsddd1ea52013-08-27 21:32:25 -04002006 return nfsd4_encode_components_esc(xdr, sep, components, 0, 0);
Weston Andros Adamsone7a04442012-04-24 11:07:59 -04002007}
2008
J.Bruce Fields81c3f412006-10-04 02:16:19 -07002009/*
2010 * encode a location element of a fs_locations structure
2011 */
J. Bruce Fieldsddd1ea52013-08-27 21:32:25 -04002012static __be32 nfsd4_encode_fs_location4(struct xdr_stream *xdr,
2013 struct nfsd4_fs_location *location)
J.Bruce Fields81c3f412006-10-04 02:16:19 -07002014{
Al Virob37ad282006-10-19 23:28:59 -07002015 __be32 status;
J.Bruce Fields81c3f412006-10-04 02:16:19 -07002016
J. Bruce Fieldsddd1ea52013-08-27 21:32:25 -04002017 status = nfsd4_encode_components_esc(xdr, ':', location->hosts,
Weston Andros Adamsone7a04442012-04-24 11:07:59 -04002018 '[', ']');
J.Bruce Fields81c3f412006-10-04 02:16:19 -07002019 if (status)
2020 return status;
J. Bruce Fieldsddd1ea52013-08-27 21:32:25 -04002021 status = nfsd4_encode_components(xdr, '/', location->path);
J.Bruce Fields81c3f412006-10-04 02:16:19 -07002022 if (status)
2023 return status;
J.Bruce Fields81c3f412006-10-04 02:16:19 -07002024 return 0;
2025}
2026
2027/*
Trond Myklebusted748aa2011-09-12 19:37:06 -04002028 * Encode a path in RFC3530 'pathname4' format
J.Bruce Fields81c3f412006-10-04 02:16:19 -07002029 */
J. Bruce Fieldsddd1ea52013-08-27 21:32:25 -04002030static __be32 nfsd4_encode_path(struct xdr_stream *xdr,
2031 const struct path *root,
2032 const struct path *path)
J.Bruce Fields81c3f412006-10-04 02:16:19 -07002033{
Al Viro301f0262013-09-01 16:06:39 -04002034 struct path cur = *path;
J. Bruce Fieldsddd1ea52013-08-27 21:32:25 -04002035 __be32 *p;
Trond Myklebusted748aa2011-09-12 19:37:06 -04002036 struct dentry **components = NULL;
2037 unsigned int ncomponents = 0;
2038 __be32 err = nfserr_jukebox;
J.Bruce Fields81c3f412006-10-04 02:16:19 -07002039
Trond Myklebusted748aa2011-09-12 19:37:06 -04002040 dprintk("nfsd4_encode_components(");
J.Bruce Fields81c3f412006-10-04 02:16:19 -07002041
Trond Myklebusted748aa2011-09-12 19:37:06 -04002042 path_get(&cur);
2043 /* First walk the path up to the nfsd root, and store the
2044 * dentries/path components in an array.
2045 */
2046 for (;;) {
Kinglong Meeb77a4b22015-03-15 23:13:32 +08002047 if (path_equal(&cur, root))
Trond Myklebusted748aa2011-09-12 19:37:06 -04002048 break;
2049 if (cur.dentry == cur.mnt->mnt_root) {
2050 if (follow_up(&cur))
2051 continue;
2052 goto out_free;
2053 }
2054 if ((ncomponents & 15) == 0) {
2055 struct dentry **new;
2056 new = krealloc(components,
2057 sizeof(*new) * (ncomponents + 16),
2058 GFP_KERNEL);
2059 if (!new)
2060 goto out_free;
2061 components = new;
2062 }
2063 components[ncomponents++] = cur.dentry;
2064 cur.dentry = dget_parent(cur.dentry);
J.Bruce Fields81c3f412006-10-04 02:16:19 -07002065 }
J. Bruce Fieldsddd1ea52013-08-27 21:32:25 -04002066 err = nfserr_resource;
2067 p = xdr_reserve_space(xdr, 4);
2068 if (!p)
Trond Myklebusted748aa2011-09-12 19:37:06 -04002069 goto out_free;
J. Bruce Fieldsc373b0a2014-03-22 17:09:18 -04002070 *p++ = cpu_to_be32(ncomponents);
Trond Myklebusted748aa2011-09-12 19:37:06 -04002071
2072 while (ncomponents) {
2073 struct dentry *dentry = components[ncomponents - 1];
Al Viro301f0262013-09-01 16:06:39 -04002074 unsigned int len;
Trond Myklebusted748aa2011-09-12 19:37:06 -04002075
Al Viro301f0262013-09-01 16:06:39 -04002076 spin_lock(&dentry->d_lock);
2077 len = dentry->d_name.len;
J. Bruce Fieldsddd1ea52013-08-27 21:32:25 -04002078 p = xdr_reserve_space(xdr, len + 4);
2079 if (!p) {
Al Viro301f0262013-09-01 16:06:39 -04002080 spin_unlock(&dentry->d_lock);
Trond Myklebusted748aa2011-09-12 19:37:06 -04002081 goto out_free;
Al Viro301f0262013-09-01 16:06:39 -04002082 }
J. Bruce Fields0c0c2672014-03-22 18:43:16 -04002083 p = xdr_encode_opaque(p, dentry->d_name.name, len);
Al Viroa4555892014-10-21 20:11:25 -04002084 dprintk("/%pd", dentry);
Al Viro301f0262013-09-01 16:06:39 -04002085 spin_unlock(&dentry->d_lock);
Trond Myklebusted748aa2011-09-12 19:37:06 -04002086 dput(dentry);
2087 ncomponents--;
2088 }
2089
Trond Myklebusted748aa2011-09-12 19:37:06 -04002090 err = 0;
2091out_free:
2092 dprintk(")\n");
2093 while (ncomponents)
2094 dput(components[--ncomponents]);
2095 kfree(components);
2096 path_put(&cur);
2097 return err;
2098}
2099
J. Bruce Fieldsddd1ea52013-08-27 21:32:25 -04002100static __be32 nfsd4_encode_fsloc_fsroot(struct xdr_stream *xdr,
2101 struct svc_rqst *rqstp, const struct path *path)
Trond Myklebusted748aa2011-09-12 19:37:06 -04002102{
2103 struct svc_export *exp_ps;
2104 __be32 res;
2105
2106 exp_ps = rqst_find_fsidzero_export(rqstp);
2107 if (IS_ERR(exp_ps))
2108 return nfserrno(PTR_ERR(exp_ps));
J. Bruce Fieldsddd1ea52013-08-27 21:32:25 -04002109 res = nfsd4_encode_path(xdr, &exp_ps->ex_path, path);
Trond Myklebusted748aa2011-09-12 19:37:06 -04002110 exp_put(exp_ps);
2111 return res;
J.Bruce Fields81c3f412006-10-04 02:16:19 -07002112}
2113
2114/*
2115 * encode a fs_locations structure
2116 */
J. Bruce Fieldsddd1ea52013-08-27 21:32:25 -04002117static __be32 nfsd4_encode_fs_locations(struct xdr_stream *xdr,
2118 struct svc_rqst *rqstp, struct svc_export *exp)
J.Bruce Fields81c3f412006-10-04 02:16:19 -07002119{
Al Virob37ad282006-10-19 23:28:59 -07002120 __be32 status;
Al Virocc45f012006-10-19 23:28:44 -07002121 int i;
J. Bruce Fieldsddd1ea52013-08-27 21:32:25 -04002122 __be32 *p;
J.Bruce Fields81c3f412006-10-04 02:16:19 -07002123 struct nfsd4_fs_locations *fslocs = &exp->ex_fslocs;
J.Bruce Fields81c3f412006-10-04 02:16:19 -07002124
J. Bruce Fieldsddd1ea52013-08-27 21:32:25 -04002125 status = nfsd4_encode_fsloc_fsroot(xdr, rqstp, &exp->ex_path);
J.Bruce Fields81c3f412006-10-04 02:16:19 -07002126 if (status)
2127 return status;
J. Bruce Fieldsddd1ea52013-08-27 21:32:25 -04002128 p = xdr_reserve_space(xdr, 4);
2129 if (!p)
J.Bruce Fields81c3f412006-10-04 02:16:19 -07002130 return nfserr_resource;
J. Bruce Fieldsc373b0a2014-03-22 17:09:18 -04002131 *p++ = cpu_to_be32(fslocs->locations_count);
J.Bruce Fields81c3f412006-10-04 02:16:19 -07002132 for (i=0; i<fslocs->locations_count; i++) {
J. Bruce Fieldsddd1ea52013-08-27 21:32:25 -04002133 status = nfsd4_encode_fs_location4(xdr, &fslocs->locations[i]);
J.Bruce Fields81c3f412006-10-04 02:16:19 -07002134 if (status)
2135 return status;
2136 }
J.Bruce Fields81c3f412006-10-04 02:16:19 -07002137 return 0;
2138}
Linus Torvalds1da177e2005-04-16 15:20:36 -07002139
J. Bruce Fields3d2544b2011-08-15 11:49:30 -04002140static u32 nfs4_file_type(umode_t mode)
2141{
2142 switch (mode & S_IFMT) {
2143 case S_IFIFO: return NF4FIFO;
2144 case S_IFCHR: return NF4CHR;
2145 case S_IFDIR: return NF4DIR;
2146 case S_IFBLK: return NF4BLK;
2147 case S_IFLNK: return NF4LNK;
2148 case S_IFREG: return NF4REG;
2149 case S_IFSOCK: return NF4SOCK;
2150 default: return NF4BAD;
2151 };
2152}
Linus Torvalds1da177e2005-04-16 15:20:36 -07002153
Al Virob37ad282006-10-19 23:28:59 -07002154static inline __be32
J. Bruce Fieldsddd1ea52013-08-27 21:32:25 -04002155nfsd4_encode_aclname(struct xdr_stream *xdr, struct svc_rqst *rqstp,
2156 struct nfs4_ace *ace)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002157{
J. Bruce Fields35541162014-01-08 09:49:01 -05002158 if (ace->whotype != NFS4_ACL_WHO_NAMED)
J. Bruce Fieldsddd1ea52013-08-27 21:32:25 -04002159 return nfs4_acl_write_who(xdr, ace->whotype);
J. Bruce Fields35541162014-01-08 09:49:01 -05002160 else if (ace->flag & NFS4_ACE_IDENTIFIER_GROUP)
J. Bruce Fieldsddd1ea52013-08-27 21:32:25 -04002161 return nfsd4_encode_group(xdr, rqstp, ace->who_gid);
J. Bruce Fields35541162014-01-08 09:49:01 -05002162 else
J. Bruce Fieldsddd1ea52013-08-27 21:32:25 -04002163 return nfsd4_encode_user(xdr, rqstp, ace->who_uid);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002164}
2165
Kinglong Mee6896f152015-07-30 21:52:44 +08002166static inline __be32
2167nfsd4_encode_layout_type(struct xdr_stream *xdr, enum pnfs_layouttype layout_type)
2168{
2169 __be32 *p;
2170
2171 if (layout_type) {
2172 p = xdr_reserve_space(xdr, 8);
2173 if (!p)
2174 return nfserr_resource;
2175 *p++ = cpu_to_be32(1);
2176 *p++ = cpu_to_be32(layout_type);
2177 } else {
2178 p = xdr_reserve_space(xdr, 4);
2179 if (!p)
2180 return nfserr_resource;
2181 *p++ = cpu_to_be32(0);
2182 }
2183
2184 return 0;
2185}
2186
J.Bruce Fields42ca0992006-10-04 02:16:20 -07002187#define WORD0_ABSENT_FS_ATTRS (FATTR4_WORD0_FS_LOCATIONS | FATTR4_WORD0_FSID | \
2188 FATTR4_WORD0_RDATTR_ERROR)
2189#define WORD1_ABSENT_FS_ATTRS FATTR4_WORD1_MOUNTED_ON_FILEID
Kinglong Meec2227a32015-07-07 10:16:37 +08002190#define WORD2_ABSENT_FS_ATTRS 0
J.Bruce Fields42ca0992006-10-04 02:16:20 -07002191
David Quigley18032ca2013-05-02 13:19:10 -04002192#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
2193static inline __be32
J. Bruce Fieldsddd1ea52013-08-27 21:32:25 -04002194nfsd4_encode_security_label(struct xdr_stream *xdr, struct svc_rqst *rqstp,
2195 void *context, int len)
David Quigley18032ca2013-05-02 13:19:10 -04002196{
J. Bruce Fieldsddd1ea52013-08-27 21:32:25 -04002197 __be32 *p;
David Quigley18032ca2013-05-02 13:19:10 -04002198
J. Bruce Fieldsddd1ea52013-08-27 21:32:25 -04002199 p = xdr_reserve_space(xdr, len + 4 + 4 + 4);
2200 if (!p)
David Quigley18032ca2013-05-02 13:19:10 -04002201 return nfserr_resource;
2202
2203 /*
2204 * For now we use a 0 here to indicate the null translation; in
2205 * the future we may place a call to translation code here.
2206 */
J. Bruce Fieldsc373b0a2014-03-22 17:09:18 -04002207 *p++ = cpu_to_be32(0); /* lfs */
2208 *p++ = cpu_to_be32(0); /* pi */
David Quigley18032ca2013-05-02 13:19:10 -04002209 p = xdr_encode_opaque(p, context, len);
David Quigley18032ca2013-05-02 13:19:10 -04002210 return 0;
2211}
2212#else
2213static inline __be32
J. Bruce Fieldsddd1ea52013-08-27 21:32:25 -04002214nfsd4_encode_security_label(struct xdr_stream *xdr, struct svc_rqst *rqstp,
2215 void *context, int len)
David Quigley18032ca2013-05-02 13:19:10 -04002216{ return 0; }
2217#endif
2218
Kinglong Meec2227a32015-07-07 10:16:37 +08002219static __be32 fattr_handle_absent_fs(u32 *bmval0, u32 *bmval1, u32 *bmval2, u32 *rdattr_err)
J.Bruce Fields42ca0992006-10-04 02:16:20 -07002220{
2221 /* As per referral draft: */
2222 if (*bmval0 & ~WORD0_ABSENT_FS_ATTRS ||
2223 *bmval1 & ~WORD1_ABSENT_FS_ATTRS) {
2224 if (*bmval0 & FATTR4_WORD0_RDATTR_ERROR ||
2225 *bmval0 & FATTR4_WORD0_FS_LOCATIONS)
2226 *rdattr_err = NFSERR_MOVED;
2227 else
2228 return nfserr_moved;
2229 }
2230 *bmval0 &= WORD0_ABSENT_FS_ATTRS;
2231 *bmval1 &= WORD1_ABSENT_FS_ATTRS;
Kinglong Meec2227a32015-07-07 10:16:37 +08002232 *bmval2 &= WORD2_ABSENT_FS_ATTRS;
J.Bruce Fields42ca0992006-10-04 02:16:20 -07002233 return 0;
2234}
Linus Torvalds1da177e2005-04-16 15:20:36 -07002235
J. Bruce Fieldsae7095a2012-10-01 17:50:56 -04002236
2237static int get_parent_attributes(struct svc_export *exp, struct kstat *stat)
2238{
2239 struct path path = exp->ex_path;
2240 int err;
2241
2242 path_get(&path);
2243 while (follow_up(&path)) {
2244 if (path.dentry != path.mnt->mnt_root)
2245 break;
2246 }
Al Viro3dadecc2013-01-24 02:18:08 -05002247 err = vfs_getattr(&path, stat);
J. Bruce Fieldsae7095a2012-10-01 17:50:56 -04002248 path_put(&path);
2249 return err;
2250}
2251
Kinglong Mee75976de2015-07-30 21:55:30 +08002252static __be32
2253nfsd4_encode_bitmap(struct xdr_stream *xdr, u32 bmval0, u32 bmval1, u32 bmval2)
2254{
2255 __be32 *p;
2256
2257 if (bmval2) {
2258 p = xdr_reserve_space(xdr, 16);
2259 if (!p)
2260 goto out_resource;
2261 *p++ = cpu_to_be32(3);
2262 *p++ = cpu_to_be32(bmval0);
2263 *p++ = cpu_to_be32(bmval1);
2264 *p++ = cpu_to_be32(bmval2);
2265 } else if (bmval1) {
2266 p = xdr_reserve_space(xdr, 12);
2267 if (!p)
2268 goto out_resource;
2269 *p++ = cpu_to_be32(2);
2270 *p++ = cpu_to_be32(bmval0);
2271 *p++ = cpu_to_be32(bmval1);
2272 } else {
2273 p = xdr_reserve_space(xdr, 8);
2274 if (!p)
2275 goto out_resource;
2276 *p++ = cpu_to_be32(1);
2277 *p++ = cpu_to_be32(bmval0);
2278 }
2279
2280 return 0;
2281out_resource:
2282 return nfserr_resource;
2283}
2284
Linus Torvalds1da177e2005-04-16 15:20:36 -07002285/*
2286 * Note: @fhp can be NULL; in this case, we might have to compose the filehandle
2287 * ourselves.
Linus Torvalds1da177e2005-04-16 15:20:36 -07002288 */
Jeff Laytonda2ebce2014-05-30 09:09:25 -04002289static __be32
J. Bruce Fieldsd5184652013-08-26 16:04:46 -04002290nfsd4_encode_fattr(struct xdr_stream *xdr, struct svc_fh *fhp,
2291 struct svc_export *exp,
2292 struct dentry *dentry, u32 *bmval,
Frank Filz406a7ea2007-11-27 11:34:05 -08002293 struct svc_rqst *rqstp, int ignore_crossmnt)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002294{
2295 u32 bmval0 = bmval[0];
2296 u32 bmval1 = bmval[1];
Andy Adamson7e705702009-04-03 08:29:11 +03002297 u32 bmval2 = bmval[2];
Linus Torvalds1da177e2005-04-16 15:20:36 -07002298 struct kstat stat;
J. Bruce Fieldsd50e6132014-01-15 12:21:12 -05002299 struct svc_fh *tempfh = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002300 struct kstatfs statfs;
J. Bruce Fieldsddd1ea52013-08-27 21:32:25 -04002301 __be32 *p;
J. Bruce Fields1fcea5b2014-02-26 20:17:02 -05002302 int starting_len = xdr->buf->len;
J. Bruce Fields082d4bd2013-08-29 15:42:52 -04002303 int attrlen_offset;
2304 __be32 attrlen;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002305 u32 dummy;
2306 u64 dummy64;
J.Bruce Fields42ca0992006-10-04 02:16:20 -07002307 u32 rdattr_err = 0;
Al Virob37ad282006-10-19 23:28:59 -07002308 __be32 status;
Al Virob8dd7b92006-10-19 23:29:01 -07002309 int err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002310 struct nfs4_acl *acl = NULL;
David Quigley18032ca2013-05-02 13:19:10 -04002311 void *context = NULL;
2312 int contextlen;
2313 bool contextsupport = false;
Andy Adamson7e705702009-04-03 08:29:11 +03002314 struct nfsd4_compoundres *resp = rqstp->rq_resp;
2315 u32 minorversion = resp->cstate.minorversion;
Christoph Hellwigebabe9a2010-07-07 18:53:11 +02002316 struct path path = {
2317 .mnt = exp->ex_path.mnt,
2318 .dentry = dentry,
2319 };
Stanislav Kinsbursky3d733712012-11-27 14:11:44 +03002320 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002321
2322 BUG_ON(bmval1 & NFSD_WRITEONLY_ATTRS_WORD1);
Andy Adamson7e705702009-04-03 08:29:11 +03002323 BUG_ON(bmval0 & ~nfsd_suppattrs0(minorversion));
2324 BUG_ON(bmval1 & ~nfsd_suppattrs1(minorversion));
2325 BUG_ON(bmval2 & ~nfsd_suppattrs2(minorversion));
Linus Torvalds1da177e2005-04-16 15:20:36 -07002326
J.Bruce Fields42ca0992006-10-04 02:16:20 -07002327 if (exp->ex_fslocs.migrated) {
Kinglong Meec2227a32015-07-07 10:16:37 +08002328 status = fattr_handle_absent_fs(&bmval0, &bmval1, &bmval2, &rdattr_err);
J.Bruce Fields42ca0992006-10-04 02:16:20 -07002329 if (status)
2330 goto out;
2331 }
2332
Al Viro3dadecc2013-01-24 02:18:08 -05002333 err = vfs_getattr(&path, &stat);
Al Virob8dd7b92006-10-19 23:29:01 -07002334 if (err)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002335 goto out_nfserr;
Christoph Hellwig12337902014-05-28 10:46:13 +02002336 if ((bmval0 & (FATTR4_WORD0_FILES_AVAIL | FATTR4_WORD0_FILES_FREE |
2337 FATTR4_WORD0_FILES_TOTAL | FATTR4_WORD0_MAXNAME)) ||
Linus Torvalds1da177e2005-04-16 15:20:36 -07002338 (bmval1 & (FATTR4_WORD1_SPACE_AVAIL | FATTR4_WORD1_SPACE_FREE |
2339 FATTR4_WORD1_SPACE_TOTAL))) {
Christoph Hellwigebabe9a2010-07-07 18:53:11 +02002340 err = vfs_statfs(&path, &statfs);
Al Virob8dd7b92006-10-19 23:29:01 -07002341 if (err)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002342 goto out_nfserr;
2343 }
2344 if ((bmval0 & (FATTR4_WORD0_FILEHANDLE | FATTR4_WORD0_FSID)) && !fhp) {
J. Bruce Fieldsd50e6132014-01-15 12:21:12 -05002345 tempfh = kmalloc(sizeof(struct svc_fh), GFP_KERNEL);
2346 status = nfserr_jukebox;
2347 if (!tempfh)
2348 goto out;
2349 fh_init(tempfh, NFS4_FHSIZE);
2350 status = fh_compose(tempfh, exp, dentry, NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002351 if (status)
2352 goto out;
J. Bruce Fieldsd50e6132014-01-15 12:21:12 -05002353 fhp = tempfh;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002354 }
Andreas Gruenbacher0c9d65e2015-04-24 13:04:00 +02002355 if (bmval0 & FATTR4_WORD0_ACL) {
Al Virob8dd7b92006-10-19 23:29:01 -07002356 err = nfsd4_get_nfs4_acl(rqstp, dentry, &acl);
Andreas Gruenbacher0c9d65e2015-04-24 13:04:00 +02002357 if (err == -EOPNOTSUPP)
2358 bmval0 &= ~FATTR4_WORD0_ACL;
2359 else if (err == -EINVAL) {
2360 status = nfserr_attrnotsupp;
2361 goto out;
2362 } else if (err != 0)
2363 goto out_nfserr;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002364 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002365
David Quigley18032ca2013-05-02 13:19:10 -04002366#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
Kinglong Meec2227a32015-07-07 10:16:37 +08002367 if ((bmval2 & FATTR4_WORD2_SECURITY_LABEL) ||
2368 bmval0 & FATTR4_WORD0_SUPPORTED_ATTRS) {
David Howells2b0143b2015-03-17 22:25:59 +00002369 err = security_inode_getsecctx(d_inode(dentry),
David Quigley18032ca2013-05-02 13:19:10 -04002370 &context, &contextlen);
2371 contextsupport = (err == 0);
2372 if (bmval2 & FATTR4_WORD2_SECURITY_LABEL) {
2373 if (err == -EOPNOTSUPP)
2374 bmval2 &= ~FATTR4_WORD2_SECURITY_LABEL;
2375 else if (err)
2376 goto out_nfserr;
2377 }
2378 }
2379#endif /* CONFIG_NFSD_V4_SECURITY_LABEL */
2380
Kinglong Mee75976de2015-07-30 21:55:30 +08002381 status = nfsd4_encode_bitmap(xdr, bmval0, bmval1, bmval2);
2382 if (status)
2383 goto out;
J. Bruce Fields082d4bd2013-08-29 15:42:52 -04002384
2385 attrlen_offset = xdr->buf->len;
J. Bruce Fieldsddd1ea52013-08-27 21:32:25 -04002386 p = xdr_reserve_space(xdr, 4);
2387 if (!p)
2388 goto out_resource;
J. Bruce Fields082d4bd2013-08-29 15:42:52 -04002389 p++; /* to be backfilled later */
Linus Torvalds1da177e2005-04-16 15:20:36 -07002390
2391 if (bmval0 & FATTR4_WORD0_SUPPORTED_ATTRS) {
Andy Adamson7e705702009-04-03 08:29:11 +03002392 u32 word0 = nfsd_suppattrs0(minorversion);
2393 u32 word1 = nfsd_suppattrs1(minorversion);
2394 u32 word2 = nfsd_suppattrs2(minorversion);
2395
Andreas Gruenbacher0c9d65e2015-04-24 13:04:00 +02002396 if (!IS_POSIXACL(dentry->d_inode))
J.Bruce Fields42ca0992006-10-04 02:16:20 -07002397 word0 &= ~FATTR4_WORD0_ACL;
David Quigley18032ca2013-05-02 13:19:10 -04002398 if (!contextsupport)
2399 word2 &= ~FATTR4_WORD2_SECURITY_LABEL;
Andy Adamson7e705702009-04-03 08:29:11 +03002400 if (!word2) {
J. Bruce Fieldsddd1ea52013-08-27 21:32:25 -04002401 p = xdr_reserve_space(xdr, 12);
2402 if (!p)
Benny Halevy2b44f1b2010-09-30 20:47:46 +02002403 goto out_resource;
J. Bruce Fieldsc373b0a2014-03-22 17:09:18 -04002404 *p++ = cpu_to_be32(2);
2405 *p++ = cpu_to_be32(word0);
2406 *p++ = cpu_to_be32(word1);
Andy Adamson7e705702009-04-03 08:29:11 +03002407 } else {
J. Bruce Fieldsddd1ea52013-08-27 21:32:25 -04002408 p = xdr_reserve_space(xdr, 16);
2409 if (!p)
Benny Halevy2b44f1b2010-09-30 20:47:46 +02002410 goto out_resource;
J. Bruce Fieldsc373b0a2014-03-22 17:09:18 -04002411 *p++ = cpu_to_be32(3);
2412 *p++ = cpu_to_be32(word0);
2413 *p++ = cpu_to_be32(word1);
2414 *p++ = cpu_to_be32(word2);
Andy Adamson7e705702009-04-03 08:29:11 +03002415 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002416 }
2417 if (bmval0 & FATTR4_WORD0_TYPE) {
J. Bruce Fieldsddd1ea52013-08-27 21:32:25 -04002418 p = xdr_reserve_space(xdr, 4);
2419 if (!p)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002420 goto out_resource;
J. Bruce Fields3d2544b2011-08-15 11:49:30 -04002421 dummy = nfs4_file_type(stat.mode);
J. Bruce Fields6b6d81372013-01-16 17:11:11 -05002422 if (dummy == NF4BAD) {
2423 status = nfserr_serverfault;
2424 goto out;
2425 }
J. Bruce Fieldsc373b0a2014-03-22 17:09:18 -04002426 *p++ = cpu_to_be32(dummy);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002427 }
2428 if (bmval0 & FATTR4_WORD0_FH_EXPIRE_TYPE) {
J. Bruce Fieldsddd1ea52013-08-27 21:32:25 -04002429 p = xdr_reserve_space(xdr, 4);
2430 if (!p)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002431 goto out_resource;
NeilBrown49640002005-06-23 22:02:58 -07002432 if (exp->ex_flags & NFSEXP_NOSUBTREECHECK)
J. Bruce Fieldsc373b0a2014-03-22 17:09:18 -04002433 *p++ = cpu_to_be32(NFS4_FH_PERSISTENT);
NeilBrown49640002005-06-23 22:02:58 -07002434 else
J. Bruce Fieldsc373b0a2014-03-22 17:09:18 -04002435 *p++ = cpu_to_be32(NFS4_FH_PERSISTENT|
2436 NFS4_FH_VOL_RENAME);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002437 }
2438 if (bmval0 & FATTR4_WORD0_CHANGE) {
J. Bruce Fieldsddd1ea52013-08-27 21:32:25 -04002439 p = xdr_reserve_space(xdr, 8);
2440 if (!p)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002441 goto out_resource;
David Howells2b0143b2015-03-17 22:25:59 +00002442 p = encode_change(p, &stat, d_inode(dentry));
Linus Torvalds1da177e2005-04-16 15:20:36 -07002443 }
2444 if (bmval0 & FATTR4_WORD0_SIZE) {
J. Bruce Fieldsddd1ea52013-08-27 21:32:25 -04002445 p = xdr_reserve_space(xdr, 8);
2446 if (!p)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002447 goto out_resource;
J. Bruce Fieldsb64c7f32014-03-22 17:11:35 -04002448 p = xdr_encode_hyper(p, stat.size);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002449 }
2450 if (bmval0 & FATTR4_WORD0_LINK_SUPPORT) {
J. Bruce Fieldsddd1ea52013-08-27 21:32:25 -04002451 p = xdr_reserve_space(xdr, 4);
2452 if (!p)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002453 goto out_resource;
J. Bruce Fieldsc373b0a2014-03-22 17:09:18 -04002454 *p++ = cpu_to_be32(1);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002455 }
2456 if (bmval0 & FATTR4_WORD0_SYMLINK_SUPPORT) {
J. Bruce Fieldsddd1ea52013-08-27 21:32:25 -04002457 p = xdr_reserve_space(xdr, 4);
2458 if (!p)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002459 goto out_resource;
J. Bruce Fieldsc373b0a2014-03-22 17:09:18 -04002460 *p++ = cpu_to_be32(1);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002461 }
2462 if (bmval0 & FATTR4_WORD0_NAMED_ATTR) {
J. Bruce Fieldsddd1ea52013-08-27 21:32:25 -04002463 p = xdr_reserve_space(xdr, 4);
2464 if (!p)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002465 goto out_resource;
J. Bruce Fieldsc373b0a2014-03-22 17:09:18 -04002466 *p++ = cpu_to_be32(0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002467 }
2468 if (bmval0 & FATTR4_WORD0_FSID) {
J. Bruce Fieldsddd1ea52013-08-27 21:32:25 -04002469 p = xdr_reserve_space(xdr, 16);
2470 if (!p)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002471 goto out_resource;
J.Bruce Fields42ca0992006-10-04 02:16:20 -07002472 if (exp->ex_fslocs.migrated) {
J. Bruce Fieldsb64c7f32014-03-22 17:11:35 -04002473 p = xdr_encode_hyper(p, NFS4_REFERRAL_FSID_MAJOR);
2474 p = xdr_encode_hyper(p, NFS4_REFERRAL_FSID_MINOR);
NeilBrownaf6a4e22007-02-14 00:33:12 -08002475 } else switch(fsid_source(fhp)) {
2476 case FSIDSOURCE_FSID:
J. Bruce Fieldsb64c7f32014-03-22 17:11:35 -04002477 p = xdr_encode_hyper(p, (u64)exp->ex_fsid);
2478 p = xdr_encode_hyper(p, (u64)0);
NeilBrownaf6a4e22007-02-14 00:33:12 -08002479 break;
2480 case FSIDSOURCE_DEV:
J. Bruce Fieldsc373b0a2014-03-22 17:09:18 -04002481 *p++ = cpu_to_be32(0);
2482 *p++ = cpu_to_be32(MAJOR(stat.dev));
2483 *p++ = cpu_to_be32(0);
2484 *p++ = cpu_to_be32(MINOR(stat.dev));
NeilBrownaf6a4e22007-02-14 00:33:12 -08002485 break;
2486 case FSIDSOURCE_UUID:
Kinglong Mee94eb3682014-05-23 20:00:19 +08002487 p = xdr_encode_opaque_fixed(p, exp->ex_uuid,
2488 EX_UUID_LEN);
NeilBrownaf6a4e22007-02-14 00:33:12 -08002489 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002490 }
2491 }
2492 if (bmval0 & FATTR4_WORD0_UNIQUE_HANDLES) {
J. Bruce Fieldsddd1ea52013-08-27 21:32:25 -04002493 p = xdr_reserve_space(xdr, 4);
2494 if (!p)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002495 goto out_resource;
J. Bruce Fieldsc373b0a2014-03-22 17:09:18 -04002496 *p++ = cpu_to_be32(0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002497 }
2498 if (bmval0 & FATTR4_WORD0_LEASE_TIME) {
J. Bruce Fieldsddd1ea52013-08-27 21:32:25 -04002499 p = xdr_reserve_space(xdr, 4);
2500 if (!p)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002501 goto out_resource;
J. Bruce Fieldsc373b0a2014-03-22 17:09:18 -04002502 *p++ = cpu_to_be32(nn->nfsd4_lease);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002503 }
2504 if (bmval0 & FATTR4_WORD0_RDATTR_ERROR) {
J. Bruce Fieldsddd1ea52013-08-27 21:32:25 -04002505 p = xdr_reserve_space(xdr, 4);
2506 if (!p)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002507 goto out_resource;
J. Bruce Fieldsc373b0a2014-03-22 17:09:18 -04002508 *p++ = cpu_to_be32(rdattr_err);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002509 }
2510 if (bmval0 & FATTR4_WORD0_ACL) {
2511 struct nfs4_ace *ace;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002512
2513 if (acl == NULL) {
J. Bruce Fieldsddd1ea52013-08-27 21:32:25 -04002514 p = xdr_reserve_space(xdr, 4);
2515 if (!p)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002516 goto out_resource;
2517
J. Bruce Fieldsc373b0a2014-03-22 17:09:18 -04002518 *p++ = cpu_to_be32(0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002519 goto out_acl;
2520 }
J. Bruce Fieldsddd1ea52013-08-27 21:32:25 -04002521 p = xdr_reserve_space(xdr, 4);
2522 if (!p)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002523 goto out_resource;
J. Bruce Fieldsc373b0a2014-03-22 17:09:18 -04002524 *p++ = cpu_to_be32(acl->naces);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002525
J. Bruce Fields28e05dd2007-02-16 01:28:30 -08002526 for (ace = acl->aces; ace < acl->aces + acl->naces; ace++) {
J. Bruce Fieldsddd1ea52013-08-27 21:32:25 -04002527 p = xdr_reserve_space(xdr, 4*3);
2528 if (!p)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002529 goto out_resource;
J. Bruce Fieldsc373b0a2014-03-22 17:09:18 -04002530 *p++ = cpu_to_be32(ace->type);
2531 *p++ = cpu_to_be32(ace->flag);
2532 *p++ = cpu_to_be32(ace->access_mask &
2533 NFS4_ACE_MASK_ALL);
J. Bruce Fieldsddd1ea52013-08-27 21:32:25 -04002534 status = nfsd4_encode_aclname(xdr, rqstp, ace);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002535 if (status)
2536 goto out;
2537 }
2538 }
2539out_acl:
2540 if (bmval0 & FATTR4_WORD0_ACLSUPPORT) {
J. Bruce Fieldsddd1ea52013-08-27 21:32:25 -04002541 p = xdr_reserve_space(xdr, 4);
2542 if (!p)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002543 goto out_resource;
Andreas Gruenbacher0c9d65e2015-04-24 13:04:00 +02002544 *p++ = cpu_to_be32(IS_POSIXACL(dentry->d_inode) ?
Linus Torvalds1da177e2005-04-16 15:20:36 -07002545 ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL : 0);
2546 }
2547 if (bmval0 & FATTR4_WORD0_CANSETTIME) {
J. Bruce Fieldsddd1ea52013-08-27 21:32:25 -04002548 p = xdr_reserve_space(xdr, 4);
2549 if (!p)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002550 goto out_resource;
J. Bruce Fieldsc373b0a2014-03-22 17:09:18 -04002551 *p++ = cpu_to_be32(1);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002552 }
2553 if (bmval0 & FATTR4_WORD0_CASE_INSENSITIVE) {
J. Bruce Fieldsddd1ea52013-08-27 21:32:25 -04002554 p = xdr_reserve_space(xdr, 4);
2555 if (!p)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002556 goto out_resource;
J. Bruce Fieldsc373b0a2014-03-22 17:09:18 -04002557 *p++ = cpu_to_be32(0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002558 }
2559 if (bmval0 & FATTR4_WORD0_CASE_PRESERVING) {
J. Bruce Fieldsddd1ea52013-08-27 21:32:25 -04002560 p = xdr_reserve_space(xdr, 4);
2561 if (!p)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002562 goto out_resource;
J. Bruce Fieldsc373b0a2014-03-22 17:09:18 -04002563 *p++ = cpu_to_be32(1);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002564 }
2565 if (bmval0 & FATTR4_WORD0_CHOWN_RESTRICTED) {
J. Bruce Fieldsddd1ea52013-08-27 21:32:25 -04002566 p = xdr_reserve_space(xdr, 4);
2567 if (!p)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002568 goto out_resource;
J. Bruce Fieldsc373b0a2014-03-22 17:09:18 -04002569 *p++ = cpu_to_be32(1);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002570 }
2571 if (bmval0 & FATTR4_WORD0_FILEHANDLE) {
J. Bruce Fieldsddd1ea52013-08-27 21:32:25 -04002572 p = xdr_reserve_space(xdr, fhp->fh_handle.fh_size + 4);
2573 if (!p)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002574 goto out_resource;
J. Bruce Fields0c0c2672014-03-22 18:43:16 -04002575 p = xdr_encode_opaque(p, &fhp->fh_handle.fh_base,
2576 fhp->fh_handle.fh_size);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002577 }
2578 if (bmval0 & FATTR4_WORD0_FILEID) {
J. Bruce Fieldsddd1ea52013-08-27 21:32:25 -04002579 p = xdr_reserve_space(xdr, 8);
2580 if (!p)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002581 goto out_resource;
J. Bruce Fieldsb64c7f32014-03-22 17:11:35 -04002582 p = xdr_encode_hyper(p, stat.ino);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002583 }
2584 if (bmval0 & FATTR4_WORD0_FILES_AVAIL) {
J. Bruce Fieldsddd1ea52013-08-27 21:32:25 -04002585 p = xdr_reserve_space(xdr, 8);
2586 if (!p)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002587 goto out_resource;
J. Bruce Fieldsb64c7f32014-03-22 17:11:35 -04002588 p = xdr_encode_hyper(p, (u64) statfs.f_ffree);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002589 }
2590 if (bmval0 & FATTR4_WORD0_FILES_FREE) {
J. Bruce Fieldsddd1ea52013-08-27 21:32:25 -04002591 p = xdr_reserve_space(xdr, 8);
2592 if (!p)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002593 goto out_resource;
J. Bruce Fieldsb64c7f32014-03-22 17:11:35 -04002594 p = xdr_encode_hyper(p, (u64) statfs.f_ffree);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002595 }
2596 if (bmval0 & FATTR4_WORD0_FILES_TOTAL) {
J. Bruce Fieldsddd1ea52013-08-27 21:32:25 -04002597 p = xdr_reserve_space(xdr, 8);
2598 if (!p)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002599 goto out_resource;
J. Bruce Fieldsb64c7f32014-03-22 17:11:35 -04002600 p = xdr_encode_hyper(p, (u64) statfs.f_files);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002601 }
J.Bruce Fields81c3f412006-10-04 02:16:19 -07002602 if (bmval0 & FATTR4_WORD0_FS_LOCATIONS) {
J. Bruce Fieldsddd1ea52013-08-27 21:32:25 -04002603 status = nfsd4_encode_fs_locations(xdr, rqstp, exp);
J.Bruce Fields81c3f412006-10-04 02:16:19 -07002604 if (status)
2605 goto out;
2606 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002607 if (bmval0 & FATTR4_WORD0_HOMOGENEOUS) {
J. Bruce Fieldsddd1ea52013-08-27 21:32:25 -04002608 p = xdr_reserve_space(xdr, 4);
2609 if (!p)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002610 goto out_resource;
J. Bruce Fieldsc373b0a2014-03-22 17:09:18 -04002611 *p++ = cpu_to_be32(1);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002612 }
2613 if (bmval0 & FATTR4_WORD0_MAXFILESIZE) {
J. Bruce Fieldsddd1ea52013-08-27 21:32:25 -04002614 p = xdr_reserve_space(xdr, 8);
2615 if (!p)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002616 goto out_resource;
J. Bruce Fieldsb64c7f32014-03-22 17:11:35 -04002617 p = xdr_encode_hyper(p, exp->ex_path.mnt->mnt_sb->s_maxbytes);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002618 }
2619 if (bmval0 & FATTR4_WORD0_MAXLINK) {
J. Bruce Fieldsddd1ea52013-08-27 21:32:25 -04002620 p = xdr_reserve_space(xdr, 4);
2621 if (!p)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002622 goto out_resource;
J. Bruce Fieldsc373b0a2014-03-22 17:09:18 -04002623 *p++ = cpu_to_be32(255);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002624 }
2625 if (bmval0 & FATTR4_WORD0_MAXNAME) {
J. Bruce Fieldsddd1ea52013-08-27 21:32:25 -04002626 p = xdr_reserve_space(xdr, 4);
2627 if (!p)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002628 goto out_resource;
J. Bruce Fieldsc373b0a2014-03-22 17:09:18 -04002629 *p++ = cpu_to_be32(statfs.f_namelen);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002630 }
2631 if (bmval0 & FATTR4_WORD0_MAXREAD) {
J. Bruce Fieldsddd1ea52013-08-27 21:32:25 -04002632 p = xdr_reserve_space(xdr, 8);
2633 if (!p)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002634 goto out_resource;
J. Bruce Fieldsb64c7f32014-03-22 17:11:35 -04002635 p = xdr_encode_hyper(p, (u64) svc_max_payload(rqstp));
Linus Torvalds1da177e2005-04-16 15:20:36 -07002636 }
2637 if (bmval0 & FATTR4_WORD0_MAXWRITE) {
J. Bruce Fieldsddd1ea52013-08-27 21:32:25 -04002638 p = xdr_reserve_space(xdr, 8);
2639 if (!p)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002640 goto out_resource;
J. Bruce Fieldsb64c7f32014-03-22 17:11:35 -04002641 p = xdr_encode_hyper(p, (u64) svc_max_payload(rqstp));
Linus Torvalds1da177e2005-04-16 15:20:36 -07002642 }
2643 if (bmval1 & FATTR4_WORD1_MODE) {
J. Bruce Fieldsddd1ea52013-08-27 21:32:25 -04002644 p = xdr_reserve_space(xdr, 4);
2645 if (!p)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002646 goto out_resource;
J. Bruce Fieldsc373b0a2014-03-22 17:09:18 -04002647 *p++ = cpu_to_be32(stat.mode & S_IALLUGO);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002648 }
2649 if (bmval1 & FATTR4_WORD1_NO_TRUNC) {
J. Bruce Fieldsddd1ea52013-08-27 21:32:25 -04002650 p = xdr_reserve_space(xdr, 4);
2651 if (!p)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002652 goto out_resource;
J. Bruce Fieldsc373b0a2014-03-22 17:09:18 -04002653 *p++ = cpu_to_be32(1);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002654 }
2655 if (bmval1 & FATTR4_WORD1_NUMLINKS) {
J. Bruce Fieldsddd1ea52013-08-27 21:32:25 -04002656 p = xdr_reserve_space(xdr, 4);
2657 if (!p)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002658 goto out_resource;
J. Bruce Fieldsc373b0a2014-03-22 17:09:18 -04002659 *p++ = cpu_to_be32(stat.nlink);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002660 }
2661 if (bmval1 & FATTR4_WORD1_OWNER) {
J. Bruce Fieldsddd1ea52013-08-27 21:32:25 -04002662 status = nfsd4_encode_user(xdr, rqstp, stat.uid);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002663 if (status)
2664 goto out;
2665 }
2666 if (bmval1 & FATTR4_WORD1_OWNER_GROUP) {
J. Bruce Fieldsddd1ea52013-08-27 21:32:25 -04002667 status = nfsd4_encode_group(xdr, rqstp, stat.gid);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002668 if (status)
2669 goto out;
2670 }
2671 if (bmval1 & FATTR4_WORD1_RAWDEV) {
J. Bruce Fieldsddd1ea52013-08-27 21:32:25 -04002672 p = xdr_reserve_space(xdr, 8);
2673 if (!p)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002674 goto out_resource;
J. Bruce Fieldsc373b0a2014-03-22 17:09:18 -04002675 *p++ = cpu_to_be32((u32) MAJOR(stat.rdev));
2676 *p++ = cpu_to_be32((u32) MINOR(stat.rdev));
Linus Torvalds1da177e2005-04-16 15:20:36 -07002677 }
2678 if (bmval1 & FATTR4_WORD1_SPACE_AVAIL) {
J. Bruce Fieldsddd1ea52013-08-27 21:32:25 -04002679 p = xdr_reserve_space(xdr, 8);
2680 if (!p)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002681 goto out_resource;
2682 dummy64 = (u64)statfs.f_bavail * (u64)statfs.f_bsize;
J. Bruce Fieldsb64c7f32014-03-22 17:11:35 -04002683 p = xdr_encode_hyper(p, dummy64);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002684 }
2685 if (bmval1 & FATTR4_WORD1_SPACE_FREE) {
J. Bruce Fieldsddd1ea52013-08-27 21:32:25 -04002686 p = xdr_reserve_space(xdr, 8);
2687 if (!p)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002688 goto out_resource;
2689 dummy64 = (u64)statfs.f_bfree * (u64)statfs.f_bsize;
J. Bruce Fieldsb64c7f32014-03-22 17:11:35 -04002690 p = xdr_encode_hyper(p, dummy64);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002691 }
2692 if (bmval1 & FATTR4_WORD1_SPACE_TOTAL) {
J. Bruce Fieldsddd1ea52013-08-27 21:32:25 -04002693 p = xdr_reserve_space(xdr, 8);
2694 if (!p)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002695 goto out_resource;
2696 dummy64 = (u64)statfs.f_blocks * (u64)statfs.f_bsize;
J. Bruce Fieldsb64c7f32014-03-22 17:11:35 -04002697 p = xdr_encode_hyper(p, dummy64);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002698 }
2699 if (bmval1 & FATTR4_WORD1_SPACE_USED) {
J. Bruce Fieldsddd1ea52013-08-27 21:32:25 -04002700 p = xdr_reserve_space(xdr, 8);
2701 if (!p)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002702 goto out_resource;
2703 dummy64 = (u64)stat.blocks << 9;
J. Bruce Fieldsb64c7f32014-03-22 17:11:35 -04002704 p = xdr_encode_hyper(p, dummy64);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002705 }
2706 if (bmval1 & FATTR4_WORD1_TIME_ACCESS) {
J. Bruce Fieldsddd1ea52013-08-27 21:32:25 -04002707 p = xdr_reserve_space(xdr, 12);
2708 if (!p)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002709 goto out_resource;
J. Bruce Fieldsb64c7f32014-03-22 17:11:35 -04002710 p = xdr_encode_hyper(p, (s64)stat.atime.tv_sec);
J. Bruce Fieldsc373b0a2014-03-22 17:09:18 -04002711 *p++ = cpu_to_be32(stat.atime.tv_nsec);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002712 }
2713 if (bmval1 & FATTR4_WORD1_TIME_DELTA) {
J. Bruce Fieldsddd1ea52013-08-27 21:32:25 -04002714 p = xdr_reserve_space(xdr, 12);
2715 if (!p)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002716 goto out_resource;
J. Bruce Fieldsc373b0a2014-03-22 17:09:18 -04002717 *p++ = cpu_to_be32(0);
2718 *p++ = cpu_to_be32(1);
2719 *p++ = cpu_to_be32(0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002720 }
2721 if (bmval1 & FATTR4_WORD1_TIME_METADATA) {
J. Bruce Fieldsddd1ea52013-08-27 21:32:25 -04002722 p = xdr_reserve_space(xdr, 12);
2723 if (!p)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002724 goto out_resource;
J. Bruce Fieldsb64c7f32014-03-22 17:11:35 -04002725 p = xdr_encode_hyper(p, (s64)stat.ctime.tv_sec);
J. Bruce Fieldsc373b0a2014-03-22 17:09:18 -04002726 *p++ = cpu_to_be32(stat.ctime.tv_nsec);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002727 }
2728 if (bmval1 & FATTR4_WORD1_TIME_MODIFY) {
J. Bruce Fieldsddd1ea52013-08-27 21:32:25 -04002729 p = xdr_reserve_space(xdr, 12);
2730 if (!p)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002731 goto out_resource;
J. Bruce Fieldsb64c7f32014-03-22 17:11:35 -04002732 p = xdr_encode_hyper(p, (s64)stat.mtime.tv_sec);
J. Bruce Fieldsc373b0a2014-03-22 17:09:18 -04002733 *p++ = cpu_to_be32(stat.mtime.tv_nsec);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002734 }
2735 if (bmval1 & FATTR4_WORD1_MOUNTED_ON_FILEID) {
Kinglong Mee0a2050d2015-07-30 21:51:54 +08002736 struct kstat parent_stat;
2737 u64 ino = stat.ino;
2738
J. Bruce Fieldsddd1ea52013-08-27 21:32:25 -04002739 p = xdr_reserve_space(xdr, 8);
2740 if (!p)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002741 goto out_resource;
Frank Filz406a7ea2007-11-27 11:34:05 -08002742 /*
2743 * Get parent's attributes if not ignoring crossmount
2744 * and this is the root of a cross-mounted filesystem.
2745 */
2746 if (ignore_crossmnt == 0 &&
Kinglong Mee0a2050d2015-07-30 21:51:54 +08002747 dentry == exp->ex_path.mnt->mnt_root) {
2748 err = get_parent_attributes(exp, &parent_stat);
2749 if (err)
2750 goto out_nfserr;
2751 ino = parent_stat.ino;
2752 }
2753 p = xdr_encode_hyper(p, ino);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002754 }
Christoph Hellwig9cf514c2014-05-05 13:11:59 +02002755#ifdef CONFIG_NFSD_PNFS
Kinglong Mee6896f152015-07-30 21:52:44 +08002756 if (bmval1 & FATTR4_WORD1_FS_LAYOUT_TYPES) {
2757 status = nfsd4_encode_layout_type(xdr, exp->ex_layout_type);
2758 if (status)
2759 goto out;
2760 }
2761
2762 if (bmval2 & FATTR4_WORD2_LAYOUT_TYPES) {
2763 status = nfsd4_encode_layout_type(xdr, exp->ex_layout_type);
2764 if (status)
2765 goto out;
Christoph Hellwig9cf514c2014-05-05 13:11:59 +02002766 }
2767
2768 if (bmval2 & FATTR4_WORD2_LAYOUT_BLKSIZE) {
2769 p = xdr_reserve_space(xdr, 4);
2770 if (!p)
2771 goto out_resource;
2772 *p++ = cpu_to_be32(stat.blksize);
2773 }
2774#endif /* CONFIG_NFSD_PNFS */
Benny Halevy8c18f202009-04-03 08:29:14 +03002775 if (bmval2 & FATTR4_WORD2_SUPPATTR_EXCLCREAT) {
Kinglong Mee75976de2015-07-30 21:55:30 +08002776 status = nfsd4_encode_bitmap(xdr, NFSD_SUPPATTR_EXCLCREAT_WORD0,
2777 NFSD_SUPPATTR_EXCLCREAT_WORD1,
2778 NFSD_SUPPATTR_EXCLCREAT_WORD2);
2779 if (status)
2780 goto out;
Benny Halevy8c18f202009-04-03 08:29:14 +03002781 }
Andy Adamson7e705702009-04-03 08:29:11 +03002782
Kinglong Mee7d580722015-07-30 21:54:26 +08002783 if (bmval2 & FATTR4_WORD2_SECURITY_LABEL) {
2784 status = nfsd4_encode_security_label(xdr, rqstp, context,
2785 contextlen);
2786 if (status)
2787 goto out;
2788 }
2789
J. Bruce Fields082d4bd2013-08-29 15:42:52 -04002790 attrlen = htonl(xdr->buf->len - attrlen_offset - 4);
2791 write_bytes_to_xdr_buf(xdr->buf, attrlen_offset, &attrlen, 4);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002792 status = nfs_ok;
2793
2794out:
J. Bruce Fieldsba4e55b2013-05-15 10:27:52 -04002795#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
David Quigley18032ca2013-05-02 13:19:10 -04002796 if (context)
2797 security_release_secctx(context, contextlen);
J. Bruce Fieldsba4e55b2013-05-15 10:27:52 -04002798#endif /* CONFIG_NFSD_V4_SECURITY_LABEL */
J. Bruce Fields28e05dd2007-02-16 01:28:30 -08002799 kfree(acl);
Yan, Zheng18df11d02014-03-10 12:52:07 +08002800 if (tempfh) {
J. Bruce Fieldsd50e6132014-01-15 12:21:12 -05002801 fh_put(tempfh);
Yan, Zheng18df11d02014-03-10 12:52:07 +08002802 kfree(tempfh);
2803 }
J. Bruce Fields1fcea5b2014-02-26 20:17:02 -05002804 if (status)
2805 xdr_truncate_encode(xdr, starting_len);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002806 return status;
2807out_nfserr:
Al Virob8dd7b92006-10-19 23:29:01 -07002808 status = nfserrno(err);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002809 goto out;
2810out_resource:
Linus Torvalds1da177e2005-04-16 15:20:36 -07002811 status = nfserr_resource;
2812 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002813}
2814
J. Bruce Fields2825a7f2013-08-26 16:04:46 -04002815static void svcxdr_init_encode_from_buffer(struct xdr_stream *xdr,
2816 struct xdr_buf *buf, __be32 *p, int bytes)
2817{
2818 xdr->scratch.iov_len = 0;
2819 memset(buf, 0, sizeof(struct xdr_buf));
2820 buf->head[0].iov_base = p;
2821 buf->head[0].iov_len = 0;
2822 buf->len = 0;
2823 xdr->buf = buf;
2824 xdr->iov = buf->head;
2825 xdr->p = p;
2826 xdr->end = (void *)p + bytes;
2827 buf->buflen = bytes;
2828}
2829
J. Bruce Fieldsd5184652013-08-26 16:04:46 -04002830__be32 nfsd4_encode_fattr_to_buf(__be32 **p, int words,
2831 struct svc_fh *fhp, struct svc_export *exp,
2832 struct dentry *dentry, u32 *bmval,
2833 struct svc_rqst *rqstp, int ignore_crossmnt)
2834{
J. Bruce Fields2825a7f2013-08-26 16:04:46 -04002835 struct xdr_buf dummy;
J. Bruce Fieldsd5184652013-08-26 16:04:46 -04002836 struct xdr_stream xdr;
2837 __be32 ret;
2838
J. Bruce Fields2825a7f2013-08-26 16:04:46 -04002839 svcxdr_init_encode_from_buffer(&xdr, &dummy, *p, words << 2);
J. Bruce Fieldsd5184652013-08-26 16:04:46 -04002840 ret = nfsd4_encode_fattr(&xdr, fhp, exp, dentry, bmval, rqstp,
2841 ignore_crossmnt);
2842 *p = xdr.p;
2843 return ret;
2844}
2845
J. Bruce Fieldsc0ce6ec2008-02-11 15:48:47 -05002846static inline int attributes_need_mount(u32 *bmval)
2847{
2848 if (bmval[0] & ~(FATTR4_WORD0_RDATTR_ERROR | FATTR4_WORD0_LEASE_TIME))
2849 return 1;
2850 if (bmval[1] & ~FATTR4_WORD1_MOUNTED_ON_FILEID)
2851 return 1;
2852 return 0;
2853}
2854
Al Virob37ad282006-10-19 23:28:59 -07002855static __be32
J. Bruce Fields561f0ed2014-01-20 16:37:11 -05002856nfsd4_encode_dirent_fattr(struct xdr_stream *xdr, struct nfsd4_readdir *cd,
2857 const char *name, int namlen)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002858{
2859 struct svc_export *exp = cd->rd_fhp->fh_export;
2860 struct dentry *dentry;
Al Virob37ad282006-10-19 23:28:59 -07002861 __be32 nfserr;
Frank Filz406a7ea2007-11-27 11:34:05 -08002862 int ignore_crossmnt = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002863
NeilBrownbbddca82016-01-07 16:08:20 -05002864 dentry = lookup_one_len_unlocked(name, cd->rd_fhp->fh_dentry, namlen);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002865 if (IS_ERR(dentry))
2866 return nfserrno(PTR_ERR(dentry));
David Howells2b0143b2015-03-17 22:25:59 +00002867 if (d_really_is_negative(dentry)) {
J. Bruce Fieldsb2c0cea2009-05-05 19:04:29 -04002868 /*
NeilBrownbbddca82016-01-07 16:08:20 -05002869 * we're not holding the i_mutex here, so there's
2870 * a window where this directory entry could have gone
2871 * away.
J. Bruce Fieldsb2c0cea2009-05-05 19:04:29 -04002872 */
2873 dput(dentry);
2874 return nfserr_noent;
2875 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002876
2877 exp_get(exp);
Frank Filz406a7ea2007-11-27 11:34:05 -08002878 /*
2879 * In the case of a mountpoint, the client may be asking for
2880 * attributes that are only properties of the underlying filesystem
2881 * as opposed to the cross-mounted file system. In such a case,
2882 * we will not follow the cross mount and will fill the attribtutes
2883 * directly from the mountpoint dentry.
2884 */
J. Bruce Fields3227fa42009-10-25 21:43:01 -04002885 if (nfsd_mountpoint(dentry, exp)) {
J.Bruce Fields021d3a72006-12-13 00:35:24 -08002886 int err;
2887
J. Bruce Fields3227fa42009-10-25 21:43:01 -04002888 if (!(exp->ex_flags & NFSEXP_V4ROOT)
2889 && !attributes_need_mount(cd->rd_bmval)) {
2890 ignore_crossmnt = 1;
2891 goto out_encode;
2892 }
Andy Adamsondcb488a32007-07-17 04:04:51 -07002893 /*
2894 * Why the heck aren't we just using nfsd_lookup??
2895 * Different "."/".." handling? Something else?
2896 * At least, add a comment here to explain....
2897 */
J.Bruce Fields021d3a72006-12-13 00:35:24 -08002898 err = nfsd_cross_mnt(cd->rd_rqstp, &dentry, &exp);
2899 if (err) {
2900 nfserr = nfserrno(err);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002901 goto out_put;
2902 }
Andy Adamsondcb488a32007-07-17 04:04:51 -07002903 nfserr = check_nfsd_access(exp, cd->rd_rqstp);
2904 if (nfserr)
2905 goto out_put;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002906
2907 }
J. Bruce Fields3227fa42009-10-25 21:43:01 -04002908out_encode:
J. Bruce Fields561f0ed2014-01-20 16:37:11 -05002909 nfserr = nfsd4_encode_fattr(xdr, NULL, exp, dentry, cd->rd_bmval,
Frank Filz406a7ea2007-11-27 11:34:05 -08002910 cd->rd_rqstp, ignore_crossmnt);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002911out_put:
2912 dput(dentry);
2913 exp_put(exp);
2914 return nfserr;
2915}
2916
Al Viro2ebbc012006-10-19 23:28:58 -07002917static __be32 *
J. Bruce Fields561f0ed2014-01-20 16:37:11 -05002918nfsd4_encode_rdattr_error(struct xdr_stream *xdr, __be32 nfserr)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002919{
J. Bruce Fields561f0ed2014-01-20 16:37:11 -05002920 __be32 *p;
2921
Kinglong Meec3a45612014-07-06 11:34:43 +08002922 p = xdr_reserve_space(xdr, 20);
J. Bruce Fields561f0ed2014-01-20 16:37:11 -05002923 if (!p)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002924 return NULL;
2925 *p++ = htonl(2);
2926 *p++ = htonl(FATTR4_WORD0_RDATTR_ERROR); /* bmval0 */
2927 *p++ = htonl(0); /* bmval1 */
2928
J. Bruce Fields87915c62013-01-16 17:33:28 -05002929 *p++ = htonl(4); /* attribute length */
Linus Torvalds1da177e2005-04-16 15:20:36 -07002930 *p++ = nfserr; /* no htonl */
Linus Torvalds1da177e2005-04-16 15:20:36 -07002931 return p;
2932}
2933
2934static int
NeilBrowna0ad13e2007-01-26 00:57:10 -08002935nfsd4_encode_dirent(void *ccdv, const char *name, int namlen,
2936 loff_t offset, u64 ino, unsigned int d_type)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002937{
NeilBrowna0ad13e2007-01-26 00:57:10 -08002938 struct readdir_cd *ccd = ccdv;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002939 struct nfsd4_readdir *cd = container_of(ccd, struct nfsd4_readdir, common);
J. Bruce Fields561f0ed2014-01-20 16:37:11 -05002940 struct xdr_stream *xdr = cd->xdr;
2941 int start_offset = xdr->buf->len;
2942 int cookie_offset;
J. Bruce Fieldsaee37762014-08-20 14:49:50 -04002943 u32 name_and_cookie;
J. Bruce Fields561f0ed2014-01-20 16:37:11 -05002944 int entry_bytes;
Al Virob37ad282006-10-19 23:28:59 -07002945 __be32 nfserr = nfserr_toosmall;
J. Bruce Fields561f0ed2014-01-20 16:37:11 -05002946 __be64 wire_offset;
2947 __be32 *p;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002948
2949 /* In nfsv4, "." and ".." never make it onto the wire.. */
2950 if (name && isdotent(name, namlen)) {
2951 cd->common.err = nfs_ok;
2952 return 0;
2953 }
2954
J. Bruce Fields561f0ed2014-01-20 16:37:11 -05002955 if (cd->cookie_offset) {
2956 wire_offset = cpu_to_be64(offset);
2957 write_bytes_to_xdr_buf(xdr->buf, cd->cookie_offset,
2958 &wire_offset, 8);
2959 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002960
J. Bruce Fields561f0ed2014-01-20 16:37:11 -05002961 p = xdr_reserve_space(xdr, 4);
2962 if (!p)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002963 goto fail;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002964 *p++ = xdr_one; /* mark entry present */
J. Bruce Fields561f0ed2014-01-20 16:37:11 -05002965 cookie_offset = xdr->buf->len;
2966 p = xdr_reserve_space(xdr, 3*4 + namlen);
2967 if (!p)
2968 goto fail;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002969 p = xdr_encode_hyper(p, NFS_OFFSET_MAX); /* offset of next entry */
2970 p = xdr_encode_array(p, name, namlen); /* name length & name */
2971
J. Bruce Fields561f0ed2014-01-20 16:37:11 -05002972 nfserr = nfsd4_encode_dirent_fattr(xdr, cd, name, namlen);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002973 switch (nfserr) {
2974 case nfs_ok:
Linus Torvalds1da177e2005-04-16 15:20:36 -07002975 break;
2976 case nfserr_resource:
2977 nfserr = nfserr_toosmall;
2978 goto fail;
J. Bruce Fieldsb2c0cea2009-05-05 19:04:29 -04002979 case nfserr_noent:
Kinglong Meef41c5ad2014-06-13 17:32:42 +08002980 xdr_truncate_encode(xdr, start_offset);
J. Bruce Fieldsb2c0cea2009-05-05 19:04:29 -04002981 goto skip_entry;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002982 default:
2983 /*
2984 * If the client requested the RDATTR_ERROR attribute,
2985 * we stuff the error code into this attribute
2986 * and continue. If this attribute was not requested,
2987 * then in accordance with the spec, we fail the
2988 * entire READDIR operation(!)
2989 */
2990 if (!(cd->rd_bmval[0] & FATTR4_WORD0_RDATTR_ERROR))
2991 goto fail;
J. Bruce Fields561f0ed2014-01-20 16:37:11 -05002992 p = nfsd4_encode_rdattr_error(xdr, nfserr);
Fred Isaman34081ef2006-01-18 17:43:40 -08002993 if (p == NULL) {
2994 nfserr = nfserr_toosmall;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002995 goto fail;
Fred Isaman34081ef2006-01-18 17:43:40 -08002996 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002997 }
J. Bruce Fields561f0ed2014-01-20 16:37:11 -05002998 nfserr = nfserr_toosmall;
2999 entry_bytes = xdr->buf->len - start_offset;
3000 if (entry_bytes > cd->rd_maxcount)
3001 goto fail;
3002 cd->rd_maxcount -= entry_bytes;
J. Bruce Fieldsaee37762014-08-20 14:49:50 -04003003 /*
3004 * RFC 3530 14.2.24 describes rd_dircount as only a "hint", so
3005 * let's always let through the first entry, at least:
3006 */
J. Bruce Fields0ec016e2014-12-19 18:01:35 -05003007 if (!cd->rd_dircount)
3008 goto fail;
3009 name_and_cookie = 4 + 4 * XDR_QUADLEN(namlen) + 8;
J. Bruce Fieldsaee37762014-08-20 14:49:50 -04003010 if (name_and_cookie > cd->rd_dircount && cd->cookie_offset)
3011 goto fail;
3012 cd->rd_dircount -= min(cd->rd_dircount, name_and_cookie);
J. Bruce Fields0ec016e2014-12-19 18:01:35 -05003013
J. Bruce Fields561f0ed2014-01-20 16:37:11 -05003014 cd->cookie_offset = cookie_offset;
J. Bruce Fieldsb2c0cea2009-05-05 19:04:29 -04003015skip_entry:
Linus Torvalds1da177e2005-04-16 15:20:36 -07003016 cd->common.err = nfs_ok;
3017 return 0;
3018fail:
J. Bruce Fields561f0ed2014-01-20 16:37:11 -05003019 xdr_truncate_encode(xdr, start_offset);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003020 cd->common.err = nfserr;
3021 return -EINVAL;
3022}
3023
J. Bruce Fieldsd0a381d2014-01-30 17:18:38 -05003024static __be32
3025nfsd4_encode_stateid(struct xdr_stream *xdr, stateid_t *sid)
Benny Halevye2f282b2008-08-12 20:45:07 +03003026{
J. Bruce Fieldsbc749ca2009-04-07 16:55:27 -07003027 __be32 *p;
Benny Halevye2f282b2008-08-12 20:45:07 +03003028
J. Bruce Fieldsd0a381d2014-01-30 17:18:38 -05003029 p = xdr_reserve_space(xdr, sizeof(stateid_t));
3030 if (!p)
3031 return nfserr_resource;
J. Bruce Fieldsc373b0a2014-03-22 17:09:18 -04003032 *p++ = cpu_to_be32(sid->si_generation);
J. Bruce Fields0c0c2672014-03-22 18:43:16 -04003033 p = xdr_encode_opaque_fixed(p, &sid->si_opaque,
3034 sizeof(stateid_opaque_t));
J. Bruce Fieldsd0a381d2014-01-30 17:18:38 -05003035 return 0;
Benny Halevye2f282b2008-08-12 20:45:07 +03003036}
3037
Benny Halevy695e12f2008-07-04 14:38:33 +03003038static __be32
Al Virob37ad282006-10-19 23:28:59 -07003039nfsd4_encode_access(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_access *access)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003040{
J. Bruce Fieldsd0a381d2014-01-30 17:18:38 -05003041 struct xdr_stream *xdr = &resp->xdr;
J. Bruce Fieldsbc749ca2009-04-07 16:55:27 -07003042 __be32 *p;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003043
3044 if (!nfserr) {
J. Bruce Fieldsd0a381d2014-01-30 17:18:38 -05003045 p = xdr_reserve_space(xdr, 8);
3046 if (!p)
3047 return nfserr_resource;
J. Bruce Fieldsc373b0a2014-03-22 17:09:18 -04003048 *p++ = cpu_to_be32(access->ac_supported);
3049 *p++ = cpu_to_be32(access->ac_resp_access);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003050 }
Benny Halevy695e12f2008-07-04 14:38:33 +03003051 return nfserr;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003052}
3053
J. Bruce Fields1d1bc8f2010-10-04 23:12:59 -04003054static __be32 nfsd4_encode_bind_conn_to_session(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_bind_conn_to_session *bcts)
3055{
J. Bruce Fieldsd0a381d2014-01-30 17:18:38 -05003056 struct xdr_stream *xdr = &resp->xdr;
J. Bruce Fields1d1bc8f2010-10-04 23:12:59 -04003057 __be32 *p;
3058
3059 if (!nfserr) {
J. Bruce Fieldsd0a381d2014-01-30 17:18:38 -05003060 p = xdr_reserve_space(xdr, NFS4_MAX_SESSIONID_LEN + 8);
3061 if (!p)
3062 return nfserr_resource;
J. Bruce Fields0c0c2672014-03-22 18:43:16 -04003063 p = xdr_encode_opaque_fixed(p, bcts->sessionid.data,
3064 NFS4_MAX_SESSIONID_LEN);
J. Bruce Fieldsc373b0a2014-03-22 17:09:18 -04003065 *p++ = cpu_to_be32(bcts->dir);
Chuck Lever4ce85c82016-03-01 13:05:27 -05003066 /* Upshifting from TCP to RDMA is not supported */
J. Bruce Fieldsc373b0a2014-03-22 17:09:18 -04003067 *p++ = cpu_to_be32(0);
J. Bruce Fields1d1bc8f2010-10-04 23:12:59 -04003068 }
3069 return nfserr;
3070}
3071
Benny Halevy695e12f2008-07-04 14:38:33 +03003072static __be32
Al Virob37ad282006-10-19 23:28:59 -07003073nfsd4_encode_close(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_close *close)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003074{
J. Bruce Fieldsd0a381d2014-01-30 17:18:38 -05003075 struct xdr_stream *xdr = &resp->xdr;
3076
Benny Halevye2f282b2008-08-12 20:45:07 +03003077 if (!nfserr)
J. Bruce Fieldsd0a381d2014-01-30 17:18:38 -05003078 nfserr = nfsd4_encode_stateid(xdr, &close->cl_stateid);
Benny Halevye2f282b2008-08-12 20:45:07 +03003079
Benny Halevy695e12f2008-07-04 14:38:33 +03003080 return nfserr;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003081}
3082
3083
Benny Halevy695e12f2008-07-04 14:38:33 +03003084static __be32
Al Virob37ad282006-10-19 23:28:59 -07003085nfsd4_encode_commit(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_commit *commit)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003086{
J. Bruce Fieldsd0a381d2014-01-30 17:18:38 -05003087 struct xdr_stream *xdr = &resp->xdr;
J. Bruce Fieldsbc749ca2009-04-07 16:55:27 -07003088 __be32 *p;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003089
3090 if (!nfserr) {
J. Bruce Fieldsd0a381d2014-01-30 17:18:38 -05003091 p = xdr_reserve_space(xdr, NFS4_VERIFIER_SIZE);
3092 if (!p)
3093 return nfserr_resource;
J. Bruce Fields0c0c2672014-03-22 18:43:16 -04003094 p = xdr_encode_opaque_fixed(p, commit->co_verf.data,
3095 NFS4_VERIFIER_SIZE);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003096 }
Benny Halevy695e12f2008-07-04 14:38:33 +03003097 return nfserr;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003098}
3099
Benny Halevy695e12f2008-07-04 14:38:33 +03003100static __be32
Al Virob37ad282006-10-19 23:28:59 -07003101nfsd4_encode_create(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_create *create)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003102{
J. Bruce Fieldsd0a381d2014-01-30 17:18:38 -05003103 struct xdr_stream *xdr = &resp->xdr;
J. Bruce Fieldsbc749ca2009-04-07 16:55:27 -07003104 __be32 *p;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003105
3106 if (!nfserr) {
Kinglong Mee75976de2015-07-30 21:55:30 +08003107 p = xdr_reserve_space(xdr, 20);
J. Bruce Fieldsd0a381d2014-01-30 17:18:38 -05003108 if (!p)
3109 return nfserr_resource;
Kinglong Mee75976de2015-07-30 21:55:30 +08003110 encode_cinfo(p, &create->cr_cinfo);
3111 nfserr = nfsd4_encode_bitmap(xdr, create->cr_bmval[0],
3112 create->cr_bmval[1], create->cr_bmval[2]);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003113 }
Benny Halevy695e12f2008-07-04 14:38:33 +03003114 return nfserr;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003115}
3116
Al Virob37ad282006-10-19 23:28:59 -07003117static __be32
3118nfsd4_encode_getattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_getattr *getattr)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003119{
3120 struct svc_fh *fhp = getattr->ga_fhp;
J. Bruce Fieldsd5184652013-08-26 16:04:46 -04003121 struct xdr_stream *xdr = &resp->xdr;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003122
3123 if (nfserr)
3124 return nfserr;
3125
J. Bruce Fieldsd5184652013-08-26 16:04:46 -04003126 nfserr = nfsd4_encode_fattr(xdr, fhp, fhp->fh_export, fhp->fh_dentry,
3127 getattr->ga_bmval,
Frank Filz406a7ea2007-11-27 11:34:05 -08003128 resp->rqstp, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003129 return nfserr;
3130}
3131
Benny Halevy695e12f2008-07-04 14:38:33 +03003132static __be32
3133nfsd4_encode_getfh(struct nfsd4_compoundres *resp, __be32 nfserr, struct svc_fh **fhpp)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003134{
J. Bruce Fieldsd0a381d2014-01-30 17:18:38 -05003135 struct xdr_stream *xdr = &resp->xdr;
Benny Halevy695e12f2008-07-04 14:38:33 +03003136 struct svc_fh *fhp = *fhpp;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003137 unsigned int len;
J. Bruce Fieldsbc749ca2009-04-07 16:55:27 -07003138 __be32 *p;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003139
3140 if (!nfserr) {
3141 len = fhp->fh_handle.fh_size;
J. Bruce Fieldsd0a381d2014-01-30 17:18:38 -05003142 p = xdr_reserve_space(xdr, len + 4);
3143 if (!p)
3144 return nfserr_resource;
J. Bruce Fields0c0c2672014-03-22 18:43:16 -04003145 p = xdr_encode_opaque(p, &fhp->fh_handle.fh_base, len);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003146 }
Benny Halevy695e12f2008-07-04 14:38:33 +03003147 return nfserr;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003148}
3149
3150/*
3151* Including all fields other than the name, a LOCK4denied structure requires
3152* 8(clientid) + 4(namelen) + 8(offset) + 8(length) + 4(type) = 32 bytes.
3153*/
J. Bruce Fieldsd0a381d2014-01-30 17:18:38 -05003154static __be32
3155nfsd4_encode_lock_denied(struct xdr_stream *xdr, struct nfsd4_lock_denied *ld)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003156{
J. Bruce Fields7c13f342011-08-30 22:15:47 -04003157 struct xdr_netobj *conf = &ld->ld_owner;
J. Bruce Fieldsbc749ca2009-04-07 16:55:27 -07003158 __be32 *p;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003159
J. Bruce Fields8c7424c2014-03-10 12:19:10 -04003160again:
J. Bruce Fieldsd0a381d2014-01-30 17:18:38 -05003161 p = xdr_reserve_space(xdr, 32 + XDR_LEN(conf->len));
J. Bruce Fields8c7424c2014-03-10 12:19:10 -04003162 if (!p) {
3163 /*
3164 * Don't fail to return the result just because we can't
3165 * return the conflicting open:
3166 */
3167 if (conf->len) {
Kinglong Meef98bac52014-07-07 22:10:56 +08003168 kfree(conf->data);
J. Bruce Fields8c7424c2014-03-10 12:19:10 -04003169 conf->len = 0;
3170 conf->data = NULL;
3171 goto again;
3172 }
J. Bruce Fieldsd0a381d2014-01-30 17:18:38 -05003173 return nfserr_resource;
J. Bruce Fields8c7424c2014-03-10 12:19:10 -04003174 }
J. Bruce Fieldsb64c7f32014-03-22 17:11:35 -04003175 p = xdr_encode_hyper(p, ld->ld_start);
3176 p = xdr_encode_hyper(p, ld->ld_length);
J. Bruce Fieldsc373b0a2014-03-22 17:09:18 -04003177 *p++ = cpu_to_be32(ld->ld_type);
J. Bruce Fields7c13f342011-08-30 22:15:47 -04003178 if (conf->len) {
J. Bruce Fields0c0c2672014-03-22 18:43:16 -04003179 p = xdr_encode_opaque_fixed(p, &ld->ld_clientid, 8);
3180 p = xdr_encode_opaque(p, conf->data, conf->len);
Kinglong Meef98bac52014-07-07 22:10:56 +08003181 kfree(conf->data);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003182 } else { /* non - nfsv4 lock in conflict, no clientid nor owner */
J. Bruce Fieldsb64c7f32014-03-22 17:11:35 -04003183 p = xdr_encode_hyper(p, (u64)0); /* clientid */
J. Bruce Fieldsc373b0a2014-03-22 17:09:18 -04003184 *p++ = cpu_to_be32(0); /* length of owner name */
Linus Torvalds1da177e2005-04-16 15:20:36 -07003185 }
J. Bruce Fieldsd0a381d2014-01-30 17:18:38 -05003186 return nfserr_denied;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003187}
3188
Benny Halevy695e12f2008-07-04 14:38:33 +03003189static __be32
Al Virob37ad282006-10-19 23:28:59 -07003190nfsd4_encode_lock(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lock *lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003191{
J. Bruce Fieldsd0a381d2014-01-30 17:18:38 -05003192 struct xdr_stream *xdr = &resp->xdr;
3193
Benny Halevye2f282b2008-08-12 20:45:07 +03003194 if (!nfserr)
J. Bruce Fieldsd0a381d2014-01-30 17:18:38 -05003195 nfserr = nfsd4_encode_stateid(xdr, &lock->lk_resp_stateid);
Benny Halevye2f282b2008-08-12 20:45:07 +03003196 else if (nfserr == nfserr_denied)
J. Bruce Fieldsd0a381d2014-01-30 17:18:38 -05003197 nfserr = nfsd4_encode_lock_denied(xdr, &lock->lk_denied);
Kinglong Meef98bac52014-07-07 22:10:56 +08003198
Benny Halevy695e12f2008-07-04 14:38:33 +03003199 return nfserr;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003200}
3201
Benny Halevy695e12f2008-07-04 14:38:33 +03003202static __be32
Al Virob37ad282006-10-19 23:28:59 -07003203nfsd4_encode_lockt(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lockt *lockt)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003204{
J. Bruce Fieldsd0a381d2014-01-30 17:18:38 -05003205 struct xdr_stream *xdr = &resp->xdr;
3206
Linus Torvalds1da177e2005-04-16 15:20:36 -07003207 if (nfserr == nfserr_denied)
J. Bruce Fieldsd0a381d2014-01-30 17:18:38 -05003208 nfsd4_encode_lock_denied(xdr, &lockt->lt_denied);
Benny Halevy695e12f2008-07-04 14:38:33 +03003209 return nfserr;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003210}
3211
Benny Halevy695e12f2008-07-04 14:38:33 +03003212static __be32
Al Virob37ad282006-10-19 23:28:59 -07003213nfsd4_encode_locku(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_locku *locku)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003214{
J. Bruce Fieldsd0a381d2014-01-30 17:18:38 -05003215 struct xdr_stream *xdr = &resp->xdr;
3216
Benny Halevye2f282b2008-08-12 20:45:07 +03003217 if (!nfserr)
J. Bruce Fieldsd0a381d2014-01-30 17:18:38 -05003218 nfserr = nfsd4_encode_stateid(xdr, &locku->lu_stateid);
Benny Halevye2f282b2008-08-12 20:45:07 +03003219
Benny Halevy695e12f2008-07-04 14:38:33 +03003220 return nfserr;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003221}
3222
3223
Benny Halevy695e12f2008-07-04 14:38:33 +03003224static __be32
Al Virob37ad282006-10-19 23:28:59 -07003225nfsd4_encode_link(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_link *link)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003226{
J. Bruce Fieldsd0a381d2014-01-30 17:18:38 -05003227 struct xdr_stream *xdr = &resp->xdr;
J. Bruce Fieldsbc749ca2009-04-07 16:55:27 -07003228 __be32 *p;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003229
3230 if (!nfserr) {
J. Bruce Fieldsd0a381d2014-01-30 17:18:38 -05003231 p = xdr_reserve_space(xdr, 20);
3232 if (!p)
3233 return nfserr_resource;
J. Bruce Fieldsd05d5742014-03-22 18:48:39 -04003234 p = encode_cinfo(p, &link->li_cinfo);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003235 }
Benny Halevy695e12f2008-07-04 14:38:33 +03003236 return nfserr;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003237}
3238
3239
Benny Halevy695e12f2008-07-04 14:38:33 +03003240static __be32
Al Virob37ad282006-10-19 23:28:59 -07003241nfsd4_encode_open(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open *open)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003242{
J. Bruce Fieldsd0a381d2014-01-30 17:18:38 -05003243 struct xdr_stream *xdr = &resp->xdr;
J. Bruce Fieldsbc749ca2009-04-07 16:55:27 -07003244 __be32 *p;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003245
3246 if (nfserr)
3247 goto out;
3248
J. Bruce Fieldsd0a381d2014-01-30 17:18:38 -05003249 nfserr = nfsd4_encode_stateid(xdr, &open->op_stateid);
3250 if (nfserr)
3251 goto out;
Kinglong Mee75976de2015-07-30 21:55:30 +08003252 p = xdr_reserve_space(xdr, 24);
J. Bruce Fieldsd0a381d2014-01-30 17:18:38 -05003253 if (!p)
3254 return nfserr_resource;
J. Bruce Fieldsd05d5742014-03-22 18:48:39 -04003255 p = encode_cinfo(p, &open->op_cinfo);
J. Bruce Fieldsc373b0a2014-03-22 17:09:18 -04003256 *p++ = cpu_to_be32(open->op_rflags);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003257
Kinglong Mee75976de2015-07-30 21:55:30 +08003258 nfserr = nfsd4_encode_bitmap(xdr, open->op_bmval[0], open->op_bmval[1],
3259 open->op_bmval[2]);
3260 if (nfserr)
3261 goto out;
3262
3263 p = xdr_reserve_space(xdr, 4);
3264 if (!p)
3265 return nfserr_resource;
3266
3267 *p++ = cpu_to_be32(open->op_delegate_type);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003268 switch (open->op_delegate_type) {
3269 case NFS4_OPEN_DELEGATE_NONE:
3270 break;
3271 case NFS4_OPEN_DELEGATE_READ:
J. Bruce Fieldsd0a381d2014-01-30 17:18:38 -05003272 nfserr = nfsd4_encode_stateid(xdr, &open->op_delegate_stateid);
3273 if (nfserr)
3274 return nfserr;
3275 p = xdr_reserve_space(xdr, 20);
3276 if (!p)
3277 return nfserr_resource;
J. Bruce Fieldsc373b0a2014-03-22 17:09:18 -04003278 *p++ = cpu_to_be32(open->op_recall);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003279
3280 /*
3281 * TODO: ACE's in delegations
3282 */
J. Bruce Fieldsc373b0a2014-03-22 17:09:18 -04003283 *p++ = cpu_to_be32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
3284 *p++ = cpu_to_be32(0);
3285 *p++ = cpu_to_be32(0);
3286 *p++ = cpu_to_be32(0); /* XXX: is NULL principal ok? */
Linus Torvalds1da177e2005-04-16 15:20:36 -07003287 break;
3288 case NFS4_OPEN_DELEGATE_WRITE:
J. Bruce Fieldsd0a381d2014-01-30 17:18:38 -05003289 nfserr = nfsd4_encode_stateid(xdr, &open->op_delegate_stateid);
3290 if (nfserr)
3291 return nfserr;
3292 p = xdr_reserve_space(xdr, 32);
3293 if (!p)
3294 return nfserr_resource;
J. Bruce Fieldsc373b0a2014-03-22 17:09:18 -04003295 *p++ = cpu_to_be32(0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003296
3297 /*
3298 * TODO: space_limit's in delegations
3299 */
J. Bruce Fieldsc373b0a2014-03-22 17:09:18 -04003300 *p++ = cpu_to_be32(NFS4_LIMIT_SIZE);
3301 *p++ = cpu_to_be32(~(u32)0);
3302 *p++ = cpu_to_be32(~(u32)0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003303
3304 /*
3305 * TODO: ACE's in delegations
3306 */
J. Bruce Fieldsc373b0a2014-03-22 17:09:18 -04003307 *p++ = cpu_to_be32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
3308 *p++ = cpu_to_be32(0);
3309 *p++ = cpu_to_be32(0);
3310 *p++ = cpu_to_be32(0); /* XXX: is NULL principal ok? */
Linus Torvalds1da177e2005-04-16 15:20:36 -07003311 break;
Benny Halevyd24433c2012-02-16 20:57:17 +02003312 case NFS4_OPEN_DELEGATE_NONE_EXT: /* 4.1 */
3313 switch (open->op_why_no_deleg) {
3314 case WND4_CONTENTION:
3315 case WND4_RESOURCE:
J. Bruce Fieldsd0a381d2014-01-30 17:18:38 -05003316 p = xdr_reserve_space(xdr, 8);
3317 if (!p)
3318 return nfserr_resource;
J. Bruce Fieldsc373b0a2014-03-22 17:09:18 -04003319 *p++ = cpu_to_be32(open->op_why_no_deleg);
3320 /* deleg signaling not supported yet: */
3321 *p++ = cpu_to_be32(0);
Benny Halevyd24433c2012-02-16 20:57:17 +02003322 break;
3323 default:
J. Bruce Fieldsd0a381d2014-01-30 17:18:38 -05003324 p = xdr_reserve_space(xdr, 4);
3325 if (!p)
3326 return nfserr_resource;
J. Bruce Fieldsc373b0a2014-03-22 17:09:18 -04003327 *p++ = cpu_to_be32(open->op_why_no_deleg);
Benny Halevyd24433c2012-02-16 20:57:17 +02003328 }
Benny Halevyd24433c2012-02-16 20:57:17 +02003329 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003330 default:
3331 BUG();
3332 }
3333 /* XXX save filehandle here */
3334out:
Benny Halevy695e12f2008-07-04 14:38:33 +03003335 return nfserr;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003336}
3337
Benny Halevy695e12f2008-07-04 14:38:33 +03003338static __be32
Al Virob37ad282006-10-19 23:28:59 -07003339nfsd4_encode_open_confirm(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_confirm *oc)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003340{
J. Bruce Fieldsd0a381d2014-01-30 17:18:38 -05003341 struct xdr_stream *xdr = &resp->xdr;
3342
Benny Halevye2f282b2008-08-12 20:45:07 +03003343 if (!nfserr)
J. Bruce Fieldsd0a381d2014-01-30 17:18:38 -05003344 nfserr = nfsd4_encode_stateid(xdr, &oc->oc_resp_stateid);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003345
Benny Halevy695e12f2008-07-04 14:38:33 +03003346 return nfserr;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003347}
3348
Benny Halevy695e12f2008-07-04 14:38:33 +03003349static __be32
Al Virob37ad282006-10-19 23:28:59 -07003350nfsd4_encode_open_downgrade(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_downgrade *od)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003351{
J. Bruce Fieldsd0a381d2014-01-30 17:18:38 -05003352 struct xdr_stream *xdr = &resp->xdr;
3353
Benny Halevye2f282b2008-08-12 20:45:07 +03003354 if (!nfserr)
J. Bruce Fieldsd0a381d2014-01-30 17:18:38 -05003355 nfserr = nfsd4_encode_stateid(xdr, &od->od_stateid);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003356
Benny Halevy695e12f2008-07-04 14:38:33 +03003357 return nfserr;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003358}
3359
J. Bruce Fieldsdc976182014-03-18 17:01:51 -04003360static __be32 nfsd4_encode_splice_read(
3361 struct nfsd4_compoundres *resp,
3362 struct nfsd4_read *read,
3363 struct file *file, unsigned long maxcount)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003364{
J. Bruce Fieldsdc976182014-03-18 17:01:51 -04003365 struct xdr_stream *xdr = &resp->xdr;
J. Bruce Fields34a78b42014-05-13 16:32:04 -04003366 struct xdr_buf *buf = xdr->buf;
J. Bruce Fieldsdc976182014-03-18 17:01:51 -04003367 u32 eof;
Benjamin Coddingtonac503e42016-03-22 10:28:36 -04003368 long len;
J. Bruce Fieldsdc976182014-03-18 17:01:51 -04003369 int space_left;
3370 __be32 nfserr;
J. Bruce Fieldsfec25fa2014-05-13 17:27:03 -04003371 __be32 *p = xdr->p - 2;
J. Bruce Fieldsdc976182014-03-18 17:01:51 -04003372
Kinglong Meed5d5c302014-07-09 21:51:27 +08003373 /* Make sure there will be room for padding if needed */
3374 if (xdr->end - xdr->p < 1)
J. Bruce Fieldsdc976182014-03-18 17:01:51 -04003375 return nfserr_resource;
3376
Benjamin Coddingtonac503e42016-03-22 10:28:36 -04003377 len = maxcount;
J. Bruce Fieldsdc976182014-03-18 17:01:51 -04003378 nfserr = nfsd_splice_read(read->rd_rqstp, file,
3379 read->rd_offset, &maxcount);
3380 if (nfserr) {
3381 /*
3382 * nfsd_splice_actor may have already messed with the
3383 * page length; reset it so as not to confuse
3384 * xdr_truncate_encode:
3385 */
J. Bruce Fields34a78b42014-05-13 16:32:04 -04003386 buf->page_len = 0;
J. Bruce Fieldsdc976182014-03-18 17:01:51 -04003387 return nfserr;
3388 }
3389
Benjamin Coddingtonac503e42016-03-22 10:28:36 -04003390 eof = nfsd_eof_on_read(len, maxcount, read->rd_offset,
3391 d_inode(read->rd_fhp->fh_dentry)->i_size);
J. Bruce Fieldsdc976182014-03-18 17:01:51 -04003392
J. Bruce Fieldsfec25fa2014-05-13 17:27:03 -04003393 *(p++) = htonl(eof);
3394 *(p++) = htonl(maxcount);
J. Bruce Fieldsdc976182014-03-18 17:01:51 -04003395
J. Bruce Fields34a78b42014-05-13 16:32:04 -04003396 buf->page_len = maxcount;
3397 buf->len += maxcount;
J. Bruce Fields15b23ef2014-09-24 16:32:34 -04003398 xdr->page_ptr += (buf->page_base + maxcount + PAGE_SIZE - 1)
3399 / PAGE_SIZE;
J. Bruce Fieldsdc976182014-03-18 17:01:51 -04003400
3401 /* Use rest of head for padding and remaining ops: */
J. Bruce Fields34a78b42014-05-13 16:32:04 -04003402 buf->tail[0].iov_base = xdr->p;
3403 buf->tail[0].iov_len = 0;
J. Bruce Fieldsfec25fa2014-05-13 17:27:03 -04003404 xdr->iov = buf->tail;
J. Bruce Fieldsdc976182014-03-18 17:01:51 -04003405 if (maxcount&3) {
J. Bruce Fieldsfec25fa2014-05-13 17:27:03 -04003406 int pad = 4 - (maxcount&3);
3407
3408 *(xdr->p++) = 0;
3409
J. Bruce Fields34a78b42014-05-13 16:32:04 -04003410 buf->tail[0].iov_base += maxcount&3;
J. Bruce Fieldsfec25fa2014-05-13 17:27:03 -04003411 buf->tail[0].iov_len = pad;
3412 buf->len += pad;
J. Bruce Fieldsdc976182014-03-18 17:01:51 -04003413 }
3414
3415 space_left = min_t(int, (void *)xdr->end - (void *)xdr->p,
J. Bruce Fields34a78b42014-05-13 16:32:04 -04003416 buf->buflen - buf->len);
3417 buf->buflen = buf->len + space_left;
J. Bruce Fieldsdc976182014-03-18 17:01:51 -04003418 xdr->end = (__be32 *)((void *)xdr->end + space_left);
3419
3420 return 0;
3421}
3422
3423static __be32 nfsd4_encode_readv(struct nfsd4_compoundres *resp,
3424 struct nfsd4_read *read,
3425 struct file *file, unsigned long maxcount)
3426{
3427 struct xdr_stream *xdr = &resp->xdr;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003428 u32 eof;
J. Bruce Fieldsafc59402012-12-10 18:01:37 -05003429 int v;
J. Bruce Fieldsdc976182014-03-18 17:01:51 -04003430 int starting_len = xdr->buf->len - 8;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003431 long len;
J. Bruce Fieldsb0420982014-03-18 17:44:10 -04003432 int thislen;
J. Bruce Fieldsdc976182014-03-18 17:01:51 -04003433 __be32 nfserr;
3434 __be32 tmp;
J. Bruce Fieldsbc749ca2009-04-07 16:55:27 -07003435 __be32 *p;
J. Bruce Fieldsb0420982014-03-18 17:44:10 -04003436 u32 zzz = 0;
3437 int pad;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003438
Linus Torvalds1da177e2005-04-16 15:20:36 -07003439 len = maxcount;
3440 v = 0;
J. Bruce Fields6ff98972014-03-11 16:51:23 -04003441
Kinglong Mee10554142014-06-29 19:18:17 +08003442 thislen = min_t(long, len, ((void *)xdr->end - (void *)xdr->p));
J. Bruce Fieldsb0420982014-03-18 17:44:10 -04003443 p = xdr_reserve_space(xdr, (thislen+3)&~3);
3444 WARN_ON_ONCE(!p);
3445 resp->rqstp->rq_vec[v].iov_base = p;
3446 resp->rqstp->rq_vec[v].iov_len = thislen;
3447 v++;
3448 len -= thislen;
3449
3450 while (len) {
J. Bruce Fields6ff98972014-03-11 16:51:23 -04003451 thislen = min_t(long, len, PAGE_SIZE);
J. Bruce Fieldsb0420982014-03-18 17:44:10 -04003452 p = xdr_reserve_space(xdr, (thislen+3)&~3);
3453 WARN_ON_ONCE(!p);
3454 resp->rqstp->rq_vec[v].iov_base = p;
J. Bruce Fields6ff98972014-03-11 16:51:23 -04003455 resp->rqstp->rq_vec[v].iov_len = thislen;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003456 v++;
J. Bruce Fields6ff98972014-03-11 16:51:23 -04003457 len -= thislen;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003458 }
3459 read->rd_vlen = v;
3460
Benjamin Coddingtonac503e42016-03-22 10:28:36 -04003461 len = maxcount;
J. Bruce Fieldsdc976182014-03-18 17:01:51 -04003462 nfserr = nfsd_readv(file, read->rd_offset, resp->rqstp->rq_vec,
3463 read->rd_vlen, &maxcount);
3464 if (nfserr)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003465 return nfserr;
J. Bruce Fieldsb0420982014-03-18 17:44:10 -04003466 xdr_truncate_encode(xdr, starting_len + 8 + ((maxcount+3)&~3));
J. Bruce Fieldsdc976182014-03-18 17:01:51 -04003467
Benjamin Coddingtonac503e42016-03-22 10:28:36 -04003468 eof = nfsd_eof_on_read(len, maxcount, read->rd_offset,
3469 d_inode(read->rd_fhp->fh_dentry)->i_size);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003470
J. Bruce Fieldsdc976182014-03-18 17:01:51 -04003471 tmp = htonl(eof);
3472 write_bytes_to_xdr_buf(xdr->buf, starting_len , &tmp, 4);
3473 tmp = htonl(maxcount);
3474 write_bytes_to_xdr_buf(xdr->buf, starting_len + 4, &tmp, 4);
3475
J. Bruce Fieldsb0420982014-03-18 17:44:10 -04003476 pad = (maxcount&3) ? 4 - (maxcount&3) : 0;
3477 write_bytes_to_xdr_buf(xdr->buf, starting_len + 8 + maxcount,
3478 &zzz, pad);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003479 return 0;
J. Bruce Fieldsdc976182014-03-18 17:01:51 -04003480
3481}
3482
3483static __be32
3484nfsd4_encode_read(struct nfsd4_compoundres *resp, __be32 nfserr,
3485 struct nfsd4_read *read)
3486{
3487 unsigned long maxcount;
3488 struct xdr_stream *xdr = &resp->xdr;
3489 struct file *file = read->rd_filp;
3490 int starting_len = xdr->buf->len;
Christoph Hellwige749a462015-06-18 16:44:58 +02003491 struct raparms *ra = NULL;
J. Bruce Fieldsdc976182014-03-18 17:01:51 -04003492 __be32 *p;
J. Bruce Fieldsdc976182014-03-18 17:01:51 -04003493
3494 if (nfserr)
Christoph Hellwig96bcad52015-06-18 16:45:01 +02003495 goto out;
J. Bruce Fieldsdc976182014-03-18 17:01:51 -04003496
3497 p = xdr_reserve_space(xdr, 8); /* eof flag and byte count */
3498 if (!p) {
Jeff Layton779fb0f2014-11-19 07:51:18 -05003499 WARN_ON_ONCE(test_bit(RQ_SPLICE_OK, &resp->rqstp->rq_flags));
Christoph Hellwig96bcad52015-06-18 16:45:01 +02003500 nfserr = nfserr_resource;
3501 goto out;
J. Bruce Fieldsdc976182014-03-18 17:01:51 -04003502 }
Christoph Hellwig68e8bb02015-06-18 16:45:02 +02003503 if (resp->xdr.buf->page_len &&
3504 test_bit(RQ_SPLICE_OK, &resp->rqstp->rq_flags)) {
J. Bruce Fieldsb0420982014-03-18 17:44:10 -04003505 WARN_ON_ONCE(1);
Christoph Hellwig96bcad52015-06-18 16:45:01 +02003506 nfserr = nfserr_resource;
3507 goto out;
J. Bruce Fieldsdc976182014-03-18 17:01:51 -04003508 }
J. Bruce Fieldsdc976182014-03-18 17:01:51 -04003509 xdr_commit_encode(xdr);
3510
3511 maxcount = svc_max_payload(resp->rqstp);
Christoph Hellwig68e8bb02015-06-18 16:45:02 +02003512 maxcount = min_t(unsigned long, maxcount,
3513 (xdr->buf->buflen - xdr->buf->len));
Kinglong Mee3c7aa152014-06-10 18:08:19 +08003514 maxcount = min_t(unsigned long, maxcount, read->rd_length);
J. Bruce Fieldsdc976182014-03-18 17:01:51 -04003515
Christoph Hellwigaf90f702015-06-18 16:45:00 +02003516 if (read->rd_tmp_file)
Christoph Hellwige749a462015-06-18 16:44:58 +02003517 ra = nfsd_init_raparms(file);
J. Bruce Fieldsdc976182014-03-18 17:01:51 -04003518
Christoph Hellwig68e8bb02015-06-18 16:45:02 +02003519 if (file->f_op->splice_read &&
3520 test_bit(RQ_SPLICE_OK, &resp->rqstp->rq_flags))
Christoph Hellwig96bcad52015-06-18 16:45:01 +02003521 nfserr = nfsd4_encode_splice_read(resp, read, file, maxcount);
J. Bruce Fieldsdc976182014-03-18 17:01:51 -04003522 else
Christoph Hellwig96bcad52015-06-18 16:45:01 +02003523 nfserr = nfsd4_encode_readv(resp, read, file, maxcount);
J. Bruce Fieldsdc976182014-03-18 17:01:51 -04003524
Christoph Hellwige749a462015-06-18 16:44:58 +02003525 if (ra)
3526 nfsd_put_raparams(file, ra);
J. Bruce Fieldsdc976182014-03-18 17:01:51 -04003527
Christoph Hellwig96bcad52015-06-18 16:45:01 +02003528 if (nfserr)
J. Bruce Fieldsdc976182014-03-18 17:01:51 -04003529 xdr_truncate_encode(xdr, starting_len);
Christoph Hellwig96bcad52015-06-18 16:45:01 +02003530
3531out:
3532 if (file)
3533 fput(file);
3534 return nfserr;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003535}
3536
Al Virob37ad282006-10-19 23:28:59 -07003537static __be32
3538nfsd4_encode_readlink(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readlink *readlink)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003539{
3540 int maxcount;
J. Bruce Fields476a7b12014-01-20 17:08:27 -05003541 __be32 wire_count;
3542 int zero = 0;
J. Bruce Fieldsddd1ea52013-08-27 21:32:25 -04003543 struct xdr_stream *xdr = &resp->xdr;
J. Bruce Fields1fcea5b2014-02-26 20:17:02 -05003544 int length_offset = xdr->buf->len;
J. Bruce Fieldsbc749ca2009-04-07 16:55:27 -07003545 __be32 *p;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003546
3547 if (nfserr)
3548 return nfserr;
J. Bruce Fields2825a7f2013-08-26 16:04:46 -04003549
3550 p = xdr_reserve_space(xdr, 4);
3551 if (!p)
3552 return nfserr_resource;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003553 maxcount = PAGE_SIZE;
J. Bruce Fieldsd0a381d2014-01-30 17:18:38 -05003554
J. Bruce Fields476a7b12014-01-20 17:08:27 -05003555 p = xdr_reserve_space(xdr, maxcount);
3556 if (!p)
J. Bruce Fields4e21ac42014-03-22 15:15:11 -04003557 return nfserr_resource;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003558 /*
3559 * XXX: By default, the ->readlink() VFS op will truncate symlinks
3560 * if they would overflow the buffer. Is this kosher in NFSv4? If
3561 * not, one easy fix is: if ->readlink() precisely fills the buffer,
3562 * assume that truncation occurred, and return NFS4ERR_RESOURCE.
3563 */
J. Bruce Fields476a7b12014-01-20 17:08:27 -05003564 nfserr = nfsd_readlink(readlink->rl_rqstp, readlink->rl_fhp,
3565 (char *)p, &maxcount);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003566 if (nfserr == nfserr_isdir)
J. Bruce Fieldsd3f627c2014-02-26 17:00:38 -05003567 nfserr = nfserr_inval;
3568 if (nfserr) {
J. Bruce Fields1fcea5b2014-02-26 20:17:02 -05003569 xdr_truncate_encode(xdr, length_offset);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003570 return nfserr;
J. Bruce Fieldsd3f627c2014-02-26 17:00:38 -05003571 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07003572
J. Bruce Fields476a7b12014-01-20 17:08:27 -05003573 wire_count = htonl(maxcount);
3574 write_bytes_to_xdr_buf(xdr->buf, length_offset, &wire_count, 4);
Avi Kivity69bbd9c2014-06-26 17:23:12 +03003575 xdr_truncate_encode(xdr, length_offset + 4 + ALIGN(maxcount, 4));
J. Bruce Fields476a7b12014-01-20 17:08:27 -05003576 if (maxcount & 3)
3577 write_bytes_to_xdr_buf(xdr->buf, length_offset + 4 + maxcount,
3578 &zero, 4 - (maxcount&3));
Linus Torvalds1da177e2005-04-16 15:20:36 -07003579 return 0;
3580}
3581
Al Virob37ad282006-10-19 23:28:59 -07003582static __be32
3583nfsd4_encode_readdir(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readdir *readdir)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003584{
3585 int maxcount;
J. Bruce Fields561f0ed2014-01-20 16:37:11 -05003586 int bytes_left;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003587 loff_t offset;
J. Bruce Fields561f0ed2014-01-20 16:37:11 -05003588 __be64 wire_offset;
J. Bruce Fieldsddd1ea52013-08-27 21:32:25 -04003589 struct xdr_stream *xdr = &resp->xdr;
J. Bruce Fields1fcea5b2014-02-26 20:17:02 -05003590 int starting_len = xdr->buf->len;
J. Bruce Fieldsbc749ca2009-04-07 16:55:27 -07003591 __be32 *p;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003592
3593 if (nfserr)
3594 return nfserr;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003595
J. Bruce Fieldsd0a381d2014-01-30 17:18:38 -05003596 p = xdr_reserve_space(xdr, NFS4_VERIFIER_SIZE);
3597 if (!p)
3598 return nfserr_resource;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003599
3600 /* XXX: Following NFSv3, we ignore the READDIR verifier for now. */
J. Bruce Fieldsc373b0a2014-03-22 17:09:18 -04003601 *p++ = cpu_to_be32(0);
3602 *p++ = cpu_to_be32(0);
J. Bruce Fields4aea24b2014-01-15 15:17:58 -05003603 resp->xdr.buf->head[0].iov_len = ((char *)resp->xdr.p)
3604 - (char *)resp->xdr.buf->head[0].iov_base;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003605
3606 /*
J. Bruce Fields561f0ed2014-01-20 16:37:11 -05003607 * Number of bytes left for directory entries allowing for the
3608 * final 8 bytes of the readdir and a following failed op:
Linus Torvalds1da177e2005-04-16 15:20:36 -07003609 */
J. Bruce Fields561f0ed2014-01-20 16:37:11 -05003610 bytes_left = xdr->buf->buflen - xdr->buf->len
3611 - COMPOUND_ERR_SLACK_SPACE - 8;
3612 if (bytes_left < 0) {
3613 nfserr = nfserr_resource;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003614 goto err_no_verf;
3615 }
J. Bruce Fields561f0ed2014-01-20 16:37:11 -05003616 maxcount = min_t(u32, readdir->rd_maxcount, INT_MAX);
3617 /*
3618 * Note the rfc defines rd_maxcount as the size of the
3619 * READDIR4resok structure, which includes the verifier above
3620 * and the 8 bytes encoded at the end of this function:
3621 */
3622 if (maxcount < 16) {
3623 nfserr = nfserr_toosmall;
3624 goto err_no_verf;
3625 }
3626 maxcount = min_t(int, maxcount-16, bytes_left);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003627
J. Bruce Fieldsaee37762014-08-20 14:49:50 -04003628 /* RFC 3530 14.2.24 allows us to ignore dircount when it's 0: */
3629 if (!readdir->rd_dircount)
3630 readdir->rd_dircount = INT_MAX;
3631
J. Bruce Fields561f0ed2014-01-20 16:37:11 -05003632 readdir->xdr = xdr;
3633 readdir->rd_maxcount = maxcount;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003634 readdir->common.err = 0;
J. Bruce Fields561f0ed2014-01-20 16:37:11 -05003635 readdir->cookie_offset = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003636
3637 offset = readdir->rd_cookie;
3638 nfserr = nfsd_readdir(readdir->rd_rqstp, readdir->rd_fhp,
3639 &offset,
3640 &readdir->common, nfsd4_encode_dirent);
3641 if (nfserr == nfs_ok &&
3642 readdir->common.err == nfserr_toosmall &&
J. Bruce Fields561f0ed2014-01-20 16:37:11 -05003643 xdr->buf->len == starting_len + 8) {
3644 /* nothing encoded; which limit did we hit?: */
3645 if (maxcount - 16 < bytes_left)
3646 /* It was the fault of rd_maxcount: */
3647 nfserr = nfserr_toosmall;
3648 else
3649 /* We ran out of buffer space: */
3650 nfserr = nfserr_resource;
3651 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07003652 if (nfserr)
3653 goto err_no_verf;
3654
J. Bruce Fields561f0ed2014-01-20 16:37:11 -05003655 if (readdir->cookie_offset) {
3656 wire_offset = cpu_to_be64(offset);
3657 write_bytes_to_xdr_buf(xdr->buf, readdir->cookie_offset,
3658 &wire_offset, 8);
3659 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07003660
J. Bruce Fields561f0ed2014-01-20 16:37:11 -05003661 p = xdr_reserve_space(xdr, 8);
3662 if (!p) {
3663 WARN_ON_ONCE(1);
3664 goto err_no_verf;
3665 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07003666 *p++ = 0; /* no more entries */
3667 *p++ = htonl(readdir->common.err == nfserr_eof);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003668
3669 return 0;
3670err_no_verf:
J. Bruce Fields1fcea5b2014-02-26 20:17:02 -05003671 xdr_truncate_encode(xdr, starting_len);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003672 return nfserr;
3673}
3674
Benny Halevy695e12f2008-07-04 14:38:33 +03003675static __be32
Al Virob37ad282006-10-19 23:28:59 -07003676nfsd4_encode_remove(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_remove *remove)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003677{
J. Bruce Fieldsd0a381d2014-01-30 17:18:38 -05003678 struct xdr_stream *xdr = &resp->xdr;
J. Bruce Fieldsbc749ca2009-04-07 16:55:27 -07003679 __be32 *p;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003680
3681 if (!nfserr) {
J. Bruce Fieldsd0a381d2014-01-30 17:18:38 -05003682 p = xdr_reserve_space(xdr, 20);
3683 if (!p)
3684 return nfserr_resource;
J. Bruce Fieldsd05d5742014-03-22 18:48:39 -04003685 p = encode_cinfo(p, &remove->rm_cinfo);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003686 }
Benny Halevy695e12f2008-07-04 14:38:33 +03003687 return nfserr;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003688}
3689
Benny Halevy695e12f2008-07-04 14:38:33 +03003690static __be32
Al Virob37ad282006-10-19 23:28:59 -07003691nfsd4_encode_rename(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_rename *rename)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003692{
J. Bruce Fieldsd0a381d2014-01-30 17:18:38 -05003693 struct xdr_stream *xdr = &resp->xdr;
J. Bruce Fieldsbc749ca2009-04-07 16:55:27 -07003694 __be32 *p;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003695
3696 if (!nfserr) {
J. Bruce Fieldsd0a381d2014-01-30 17:18:38 -05003697 p = xdr_reserve_space(xdr, 40);
3698 if (!p)
3699 return nfserr_resource;
J. Bruce Fieldsd05d5742014-03-22 18:48:39 -04003700 p = encode_cinfo(p, &rename->rn_sinfo);
3701 p = encode_cinfo(p, &rename->rn_tinfo);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003702 }
Benny Halevy695e12f2008-07-04 14:38:33 +03003703 return nfserr;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003704}
3705
Benny Halevy695e12f2008-07-04 14:38:33 +03003706static __be32
J. Bruce Fieldsd0a381d2014-01-30 17:18:38 -05003707nfsd4_do_encode_secinfo(struct xdr_stream *xdr,
Chuck Levera77c8062013-03-16 15:55:10 -04003708 __be32 nfserr, struct svc_export *exp)
Andy Adamsondcb488a32007-07-17 04:04:51 -07003709{
Chuck Lever676e4eb2013-04-30 18:48:54 -04003710 u32 i, nflavs, supported;
J. Bruce Fields4796f452007-07-17 04:04:51 -07003711 struct exp_flavor_info *flavs;
3712 struct exp_flavor_info def_flavs[2];
Chuck Lever676e4eb2013-04-30 18:48:54 -04003713 __be32 *p, *flavorsp;
3714 static bool report = true;
Andy Adamsondcb488a32007-07-17 04:04:51 -07003715
3716 if (nfserr)
3717 goto out;
J. Bruce Fieldsd0a381d2014-01-30 17:18:38 -05003718 nfserr = nfserr_resource;
J. Bruce Fields4796f452007-07-17 04:04:51 -07003719 if (exp->ex_nflavors) {
3720 flavs = exp->ex_flavors;
3721 nflavs = exp->ex_nflavors;
3722 } else { /* Handling of some defaults in absence of real secinfo: */
3723 flavs = def_flavs;
3724 if (exp->ex_client->flavour->flavour == RPC_AUTH_UNIX) {
3725 nflavs = 2;
3726 flavs[0].pseudoflavor = RPC_AUTH_UNIX;
3727 flavs[1].pseudoflavor = RPC_AUTH_NULL;
3728 } else if (exp->ex_client->flavour->flavour == RPC_AUTH_GSS) {
3729 nflavs = 1;
3730 flavs[0].pseudoflavor
3731 = svcauth_gss_flavor(exp->ex_client);
3732 } else {
3733 nflavs = 1;
3734 flavs[0].pseudoflavor
3735 = exp->ex_client->flavour->flavour;
3736 }
3737 }
3738
Chuck Lever676e4eb2013-04-30 18:48:54 -04003739 supported = 0;
J. Bruce Fieldsd0a381d2014-01-30 17:18:38 -05003740 p = xdr_reserve_space(xdr, 4);
3741 if (!p)
3742 goto out;
Chuck Lever676e4eb2013-04-30 18:48:54 -04003743 flavorsp = p++; /* to be backfilled later */
Chuck Lever676e4eb2013-04-30 18:48:54 -04003744
J. Bruce Fields4796f452007-07-17 04:04:51 -07003745 for (i = 0; i < nflavs; i++) {
Chuck Lever676e4eb2013-04-30 18:48:54 -04003746 rpc_authflavor_t pf = flavs[i].pseudoflavor;
Chuck Levera77c8062013-03-16 15:55:10 -04003747 struct rpcsec_gss_info info;
Andy Adamsondcb488a32007-07-17 04:04:51 -07003748
Chuck Lever676e4eb2013-04-30 18:48:54 -04003749 if (rpcauth_get_gssinfo(pf, &info) == 0) {
3750 supported++;
J. Bruce Fieldsd0a381d2014-01-30 17:18:38 -05003751 p = xdr_reserve_space(xdr, 4 + 4 +
3752 XDR_LEN(info.oid.len) + 4 + 4);
3753 if (!p)
3754 goto out;
J. Bruce Fieldsc373b0a2014-03-22 17:09:18 -04003755 *p++ = cpu_to_be32(RPC_AUTH_GSS);
J. Bruce Fields0c0c2672014-03-22 18:43:16 -04003756 p = xdr_encode_opaque(p, info.oid.data, info.oid.len);
J. Bruce Fieldsc373b0a2014-03-22 17:09:18 -04003757 *p++ = cpu_to_be32(info.qop);
3758 *p++ = cpu_to_be32(info.service);
Chuck Lever676e4eb2013-04-30 18:48:54 -04003759 } else if (pf < RPC_AUTH_MAXFLAVOR) {
3760 supported++;
J. Bruce Fieldsd0a381d2014-01-30 17:18:38 -05003761 p = xdr_reserve_space(xdr, 4);
3762 if (!p)
3763 goto out;
J. Bruce Fieldsc373b0a2014-03-22 17:09:18 -04003764 *p++ = cpu_to_be32(pf);
Chuck Lever676e4eb2013-04-30 18:48:54 -04003765 } else {
3766 if (report)
3767 pr_warn("NFS: SECINFO: security flavor %u "
3768 "is not supported\n", pf);
Andy Adamsondcb488a32007-07-17 04:04:51 -07003769 }
3770 }
Chuck Levera77c8062013-03-16 15:55:10 -04003771
Chuck Lever676e4eb2013-04-30 18:48:54 -04003772 if (nflavs != supported)
3773 report = false;
3774 *flavorsp = htonl(supported);
J. Bruce Fieldsd0a381d2014-01-30 17:18:38 -05003775 nfserr = 0;
Andy Adamsondcb488a32007-07-17 04:04:51 -07003776out:
3777 if (exp)
3778 exp_put(exp);
Benny Halevy695e12f2008-07-04 14:38:33 +03003779 return nfserr;
Andy Adamsondcb488a32007-07-17 04:04:51 -07003780}
3781
Mi Jinlong22b6dee2010-12-27 14:29:57 +08003782static __be32
3783nfsd4_encode_secinfo(struct nfsd4_compoundres *resp, __be32 nfserr,
3784 struct nfsd4_secinfo *secinfo)
3785{
J. Bruce Fieldsd0a381d2014-01-30 17:18:38 -05003786 struct xdr_stream *xdr = &resp->xdr;
3787
3788 return nfsd4_do_encode_secinfo(xdr, nfserr, secinfo->si_exp);
Mi Jinlong22b6dee2010-12-27 14:29:57 +08003789}
3790
3791static __be32
3792nfsd4_encode_secinfo_no_name(struct nfsd4_compoundres *resp, __be32 nfserr,
3793 struct nfsd4_secinfo_no_name *secinfo)
3794{
J. Bruce Fieldsd0a381d2014-01-30 17:18:38 -05003795 struct xdr_stream *xdr = &resp->xdr;
3796
3797 return nfsd4_do_encode_secinfo(xdr, nfserr, secinfo->sin_exp);
Mi Jinlong22b6dee2010-12-27 14:29:57 +08003798}
3799
Linus Torvalds1da177e2005-04-16 15:20:36 -07003800/*
3801 * The SETATTR encode routine is special -- it always encodes a bitmap,
3802 * regardless of the error status.
3803 */
Benny Halevy695e12f2008-07-04 14:38:33 +03003804static __be32
Al Virob37ad282006-10-19 23:28:59 -07003805nfsd4_encode_setattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setattr *setattr)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003806{
J. Bruce Fieldsd0a381d2014-01-30 17:18:38 -05003807 struct xdr_stream *xdr = &resp->xdr;
J. Bruce Fieldsbc749ca2009-04-07 16:55:27 -07003808 __be32 *p;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003809
J. Bruce Fieldsd0a381d2014-01-30 17:18:38 -05003810 p = xdr_reserve_space(xdr, 16);
3811 if (!p)
3812 return nfserr_resource;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003813 if (nfserr) {
J. Bruce Fieldsc373b0a2014-03-22 17:09:18 -04003814 *p++ = cpu_to_be32(3);
3815 *p++ = cpu_to_be32(0);
3816 *p++ = cpu_to_be32(0);
3817 *p++ = cpu_to_be32(0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003818 }
3819 else {
J. Bruce Fieldsc373b0a2014-03-22 17:09:18 -04003820 *p++ = cpu_to_be32(3);
3821 *p++ = cpu_to_be32(setattr->sa_bmval[0]);
3822 *p++ = cpu_to_be32(setattr->sa_bmval[1]);
3823 *p++ = cpu_to_be32(setattr->sa_bmval[2]);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003824 }
Benny Halevy695e12f2008-07-04 14:38:33 +03003825 return nfserr;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003826}
3827
Benny Halevy695e12f2008-07-04 14:38:33 +03003828static __be32
Al Virob37ad282006-10-19 23:28:59 -07003829nfsd4_encode_setclientid(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setclientid *scd)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003830{
J. Bruce Fieldsd0a381d2014-01-30 17:18:38 -05003831 struct xdr_stream *xdr = &resp->xdr;
J. Bruce Fieldsbc749ca2009-04-07 16:55:27 -07003832 __be32 *p;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003833
3834 if (!nfserr) {
J. Bruce Fieldsd0a381d2014-01-30 17:18:38 -05003835 p = xdr_reserve_space(xdr, 8 + NFS4_VERIFIER_SIZE);
3836 if (!p)
3837 return nfserr_resource;
J. Bruce Fields0c0c2672014-03-22 18:43:16 -04003838 p = xdr_encode_opaque_fixed(p, &scd->se_clientid, 8);
3839 p = xdr_encode_opaque_fixed(p, &scd->se_confirm,
3840 NFS4_VERIFIER_SIZE);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003841 }
3842 else if (nfserr == nfserr_clid_inuse) {
J. Bruce Fieldsd0a381d2014-01-30 17:18:38 -05003843 p = xdr_reserve_space(xdr, 8);
3844 if (!p)
3845 return nfserr_resource;
J. Bruce Fieldsc373b0a2014-03-22 17:09:18 -04003846 *p++ = cpu_to_be32(0);
3847 *p++ = cpu_to_be32(0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003848 }
Benny Halevy695e12f2008-07-04 14:38:33 +03003849 return nfserr;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003850}
3851
Benny Halevy695e12f2008-07-04 14:38:33 +03003852static __be32
Al Virob37ad282006-10-19 23:28:59 -07003853nfsd4_encode_write(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_write *write)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003854{
J. Bruce Fieldsd0a381d2014-01-30 17:18:38 -05003855 struct xdr_stream *xdr = &resp->xdr;
J. Bruce Fieldsbc749ca2009-04-07 16:55:27 -07003856 __be32 *p;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003857
3858 if (!nfserr) {
J. Bruce Fieldsd0a381d2014-01-30 17:18:38 -05003859 p = xdr_reserve_space(xdr, 16);
3860 if (!p)
3861 return nfserr_resource;
J. Bruce Fieldsc373b0a2014-03-22 17:09:18 -04003862 *p++ = cpu_to_be32(write->wr_bytes_written);
3863 *p++ = cpu_to_be32(write->wr_how_written);
J. Bruce Fields0c0c2672014-03-22 18:43:16 -04003864 p = xdr_encode_opaque_fixed(p, write->wr_verifier.data,
3865 NFS4_VERIFIER_SIZE);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003866 }
Benny Halevy695e12f2008-07-04 14:38:33 +03003867 return nfserr;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003868}
3869
J. Bruce Fields57266a62013-04-13 14:27:29 -04003870static const u32 nfs4_minimal_spo_must_enforce[2] = {
3871 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) |
3872 1 << (OP_EXCHANGE_ID - 32) |
3873 1 << (OP_CREATE_SESSION - 32) |
3874 1 << (OP_DESTROY_SESSION - 32) |
3875 1 << (OP_DESTROY_CLIENTID - 32)
3876};
3877
Benny Halevy695e12f2008-07-04 14:38:33 +03003878static __be32
J. Bruce Fields57b7b432012-04-25 17:58:50 -04003879nfsd4_encode_exchange_id(struct nfsd4_compoundres *resp, __be32 nfserr,
Andy Adamson2db134e2009-04-03 08:27:55 +03003880 struct nfsd4_exchange_id *exid)
3881{
J. Bruce Fieldsd0a381d2014-01-30 17:18:38 -05003882 struct xdr_stream *xdr = &resp->xdr;
J. Bruce Fieldsbc749ca2009-04-07 16:55:27 -07003883 __be32 *p;
Andy Adamson0733d212009-04-03 08:28:01 +03003884 char *major_id;
3885 char *server_scope;
3886 int major_id_sz;
3887 int server_scope_sz;
3888 uint64_t minor_id = 0;
3889
3890 if (nfserr)
3891 return nfserr;
3892
3893 major_id = utsname()->nodename;
3894 major_id_sz = strlen(major_id);
3895 server_scope = utsname()->nodename;
3896 server_scope_sz = strlen(server_scope);
3897
J. Bruce Fieldsd0a381d2014-01-30 17:18:38 -05003898 p = xdr_reserve_space(xdr,
Andy Adamson0733d212009-04-03 08:28:01 +03003899 8 /* eir_clientid */ +
3900 4 /* eir_sequenceid */ +
3901 4 /* eir_flags */ +
Kinglong Meea8bb84b2013-12-10 15:24:36 +08003902 4 /* spr_how */);
J. Bruce Fieldsd0a381d2014-01-30 17:18:38 -05003903 if (!p)
3904 return nfserr_resource;
Andy Adamson0733d212009-04-03 08:28:01 +03003905
J. Bruce Fields0c0c2672014-03-22 18:43:16 -04003906 p = xdr_encode_opaque_fixed(p, &exid->clientid, 8);
J. Bruce Fieldsc373b0a2014-03-22 17:09:18 -04003907 *p++ = cpu_to_be32(exid->seqid);
3908 *p++ = cpu_to_be32(exid->flags);
Andy Adamson0733d212009-04-03 08:28:01 +03003909
J. Bruce Fieldsc373b0a2014-03-22 17:09:18 -04003910 *p++ = cpu_to_be32(exid->spa_how);
Kinglong Meea8bb84b2013-12-10 15:24:36 +08003911
J. Bruce Fields57266a62013-04-13 14:27:29 -04003912 switch (exid->spa_how) {
3913 case SP4_NONE:
3914 break;
3915 case SP4_MACH_CRED:
Kinglong Meea8bb84b2013-12-10 15:24:36 +08003916 /* spo_must_enforce, spo_must_allow */
J. Bruce Fieldsd0a381d2014-01-30 17:18:38 -05003917 p = xdr_reserve_space(xdr, 16);
3918 if (!p)
3919 return nfserr_resource;
Kinglong Meea8bb84b2013-12-10 15:24:36 +08003920
J. Bruce Fields57266a62013-04-13 14:27:29 -04003921 /* spo_must_enforce bitmap: */
J. Bruce Fieldsc373b0a2014-03-22 17:09:18 -04003922 *p++ = cpu_to_be32(2);
3923 *p++ = cpu_to_be32(nfs4_minimal_spo_must_enforce[0]);
3924 *p++ = cpu_to_be32(nfs4_minimal_spo_must_enforce[1]);
J. Bruce Fields57266a62013-04-13 14:27:29 -04003925 /* empty spo_must_allow bitmap: */
J. Bruce Fieldsc373b0a2014-03-22 17:09:18 -04003926 *p++ = cpu_to_be32(0);
Kinglong Meea8bb84b2013-12-10 15:24:36 +08003927
J. Bruce Fields57266a62013-04-13 14:27:29 -04003928 break;
3929 default:
3930 WARN_ON_ONCE(1);
3931 }
Andy Adamson0733d212009-04-03 08:28:01 +03003932
J. Bruce Fieldsd0a381d2014-01-30 17:18:38 -05003933 p = xdr_reserve_space(xdr,
Kinglong Meea8bb84b2013-12-10 15:24:36 +08003934 8 /* so_minor_id */ +
3935 4 /* so_major_id.len */ +
3936 (XDR_QUADLEN(major_id_sz) * 4) +
3937 4 /* eir_server_scope.len */ +
3938 (XDR_QUADLEN(server_scope_sz) * 4) +
3939 4 /* eir_server_impl_id.count (0) */);
J. Bruce Fieldsd0a381d2014-01-30 17:18:38 -05003940 if (!p)
3941 return nfserr_resource;
Kinglong Meea8bb84b2013-12-10 15:24:36 +08003942
Andy Adamson0733d212009-04-03 08:28:01 +03003943 /* The server_owner struct */
J. Bruce Fieldsb64c7f32014-03-22 17:11:35 -04003944 p = xdr_encode_hyper(p, minor_id); /* Minor id */
Andy Adamson0733d212009-04-03 08:28:01 +03003945 /* major id */
J. Bruce Fields0c0c2672014-03-22 18:43:16 -04003946 p = xdr_encode_opaque(p, major_id, major_id_sz);
Andy Adamson0733d212009-04-03 08:28:01 +03003947
3948 /* Server scope */
J. Bruce Fields0c0c2672014-03-22 18:43:16 -04003949 p = xdr_encode_opaque(p, server_scope, server_scope_sz);
Andy Adamson0733d212009-04-03 08:28:01 +03003950
3951 /* Implementation id */
J. Bruce Fieldsc373b0a2014-03-22 17:09:18 -04003952 *p++ = cpu_to_be32(0); /* zero length nfs_impl_id4 array */
Andy Adamson0733d212009-04-03 08:28:01 +03003953 return 0;
Andy Adamson2db134e2009-04-03 08:27:55 +03003954}
3955
3956static __be32
J. Bruce Fields57b7b432012-04-25 17:58:50 -04003957nfsd4_encode_create_session(struct nfsd4_compoundres *resp, __be32 nfserr,
Andy Adamson2db134e2009-04-03 08:27:55 +03003958 struct nfsd4_create_session *sess)
3959{
J. Bruce Fieldsd0a381d2014-01-30 17:18:38 -05003960 struct xdr_stream *xdr = &resp->xdr;
J. Bruce Fieldsbc749ca2009-04-07 16:55:27 -07003961 __be32 *p;
Andy Adamsonec6b5d72009-04-03 08:28:28 +03003962
3963 if (nfserr)
3964 return nfserr;
3965
J. Bruce Fieldsd0a381d2014-01-30 17:18:38 -05003966 p = xdr_reserve_space(xdr, 24);
3967 if (!p)
3968 return nfserr_resource;
J. Bruce Fields0c0c2672014-03-22 18:43:16 -04003969 p = xdr_encode_opaque_fixed(p, sess->sessionid.data,
3970 NFS4_MAX_SESSIONID_LEN);
J. Bruce Fieldsc373b0a2014-03-22 17:09:18 -04003971 *p++ = cpu_to_be32(sess->seqid);
3972 *p++ = cpu_to_be32(sess->flags);
Andy Adamsonec6b5d72009-04-03 08:28:28 +03003973
J. Bruce Fieldsd0a381d2014-01-30 17:18:38 -05003974 p = xdr_reserve_space(xdr, 28);
3975 if (!p)
3976 return nfserr_resource;
J. Bruce Fieldsc373b0a2014-03-22 17:09:18 -04003977 *p++ = cpu_to_be32(0); /* headerpadsz */
3978 *p++ = cpu_to_be32(sess->fore_channel.maxreq_sz);
3979 *p++ = cpu_to_be32(sess->fore_channel.maxresp_sz);
3980 *p++ = cpu_to_be32(sess->fore_channel.maxresp_cached);
3981 *p++ = cpu_to_be32(sess->fore_channel.maxops);
3982 *p++ = cpu_to_be32(sess->fore_channel.maxreqs);
3983 *p++ = cpu_to_be32(sess->fore_channel.nr_rdma_attrs);
Andy Adamsonec6b5d72009-04-03 08:28:28 +03003984
3985 if (sess->fore_channel.nr_rdma_attrs) {
J. Bruce Fieldsd0a381d2014-01-30 17:18:38 -05003986 p = xdr_reserve_space(xdr, 4);
3987 if (!p)
3988 return nfserr_resource;
J. Bruce Fieldsc373b0a2014-03-22 17:09:18 -04003989 *p++ = cpu_to_be32(sess->fore_channel.rdma_attrs);
Andy Adamsonec6b5d72009-04-03 08:28:28 +03003990 }
3991
J. Bruce Fieldsd0a381d2014-01-30 17:18:38 -05003992 p = xdr_reserve_space(xdr, 28);
3993 if (!p)
3994 return nfserr_resource;
J. Bruce Fieldsc373b0a2014-03-22 17:09:18 -04003995 *p++ = cpu_to_be32(0); /* headerpadsz */
3996 *p++ = cpu_to_be32(sess->back_channel.maxreq_sz);
3997 *p++ = cpu_to_be32(sess->back_channel.maxresp_sz);
3998 *p++ = cpu_to_be32(sess->back_channel.maxresp_cached);
3999 *p++ = cpu_to_be32(sess->back_channel.maxops);
4000 *p++ = cpu_to_be32(sess->back_channel.maxreqs);
4001 *p++ = cpu_to_be32(sess->back_channel.nr_rdma_attrs);
Andy Adamsonec6b5d72009-04-03 08:28:28 +03004002
4003 if (sess->back_channel.nr_rdma_attrs) {
J. Bruce Fieldsd0a381d2014-01-30 17:18:38 -05004004 p = xdr_reserve_space(xdr, 4);
4005 if (!p)
4006 return nfserr_resource;
J. Bruce Fieldsc373b0a2014-03-22 17:09:18 -04004007 *p++ = cpu_to_be32(sess->back_channel.rdma_attrs);
Andy Adamsonec6b5d72009-04-03 08:28:28 +03004008 }
4009 return 0;
Andy Adamson2db134e2009-04-03 08:27:55 +03004010}
4011
4012static __be32
J. Bruce Fields57b7b432012-04-25 17:58:50 -04004013nfsd4_encode_sequence(struct nfsd4_compoundres *resp, __be32 nfserr,
Andy Adamson2db134e2009-04-03 08:27:55 +03004014 struct nfsd4_sequence *seq)
4015{
J. Bruce Fieldsd0a381d2014-01-30 17:18:38 -05004016 struct xdr_stream *xdr = &resp->xdr;
J. Bruce Fieldsbc749ca2009-04-07 16:55:27 -07004017 __be32 *p;
Benny Halevyb85d4c02009-04-03 08:28:08 +03004018
4019 if (nfserr)
4020 return nfserr;
4021
J. Bruce Fieldsd0a381d2014-01-30 17:18:38 -05004022 p = xdr_reserve_space(xdr, NFS4_MAX_SESSIONID_LEN + 20);
4023 if (!p)
4024 return nfserr_resource;
J. Bruce Fields0c0c2672014-03-22 18:43:16 -04004025 p = xdr_encode_opaque_fixed(p, seq->sessionid.data,
4026 NFS4_MAX_SESSIONID_LEN);
J. Bruce Fieldsc373b0a2014-03-22 17:09:18 -04004027 *p++ = cpu_to_be32(seq->seqid);
4028 *p++ = cpu_to_be32(seq->slotid);
J. Bruce Fieldsb7d7ca32011-08-31 15:39:30 -04004029 /* Note slotid's are numbered from zero: */
J. Bruce Fieldsc373b0a2014-03-22 17:09:18 -04004030 *p++ = cpu_to_be32(seq->maxslots - 1); /* sr_highest_slotid */
4031 *p++ = cpu_to_be32(seq->maxslots - 1); /* sr_target_highest_slotid */
4032 *p++ = cpu_to_be32(seq->status_flags);
Benny Halevyb85d4c02009-04-03 08:28:08 +03004033
J. Bruce Fieldsf5236012014-03-21 17:57:57 -04004034 resp->cstate.data_offset = xdr->buf->len; /* DRC cache data pointer */
Benny Halevyb85d4c02009-04-03 08:28:08 +03004035 return 0;
Andy Adamson2db134e2009-04-03 08:27:55 +03004036}
4037
J. Bruce Fields2355c592012-04-25 16:56:22 -04004038static __be32
J. Bruce Fields57b7b432012-04-25 17:58:50 -04004039nfsd4_encode_test_stateid(struct nfsd4_compoundres *resp, __be32 nfserr,
Bryan Schumaker17456802011-07-13 10:50:48 -04004040 struct nfsd4_test_stateid *test_stateid)
4041{
J. Bruce Fieldsd0a381d2014-01-30 17:18:38 -05004042 struct xdr_stream *xdr = &resp->xdr;
Bryan Schumaker03cfb422012-01-27 10:22:49 -05004043 struct nfsd4_test_stateid_id *stateid, *next;
Bryan Schumaker17456802011-07-13 10:50:48 -04004044 __be32 *p;
Bryan Schumaker17456802011-07-13 10:50:48 -04004045
J. Bruce Fieldsa11fcce2014-02-03 16:31:42 -05004046 if (nfserr)
4047 return nfserr;
4048
J. Bruce Fieldsd0a381d2014-01-30 17:18:38 -05004049 p = xdr_reserve_space(xdr, 4 + (4 * test_stateid->ts_num_ids));
4050 if (!p)
4051 return nfserr_resource;
Bryan Schumaker17456802011-07-13 10:50:48 -04004052 *p++ = htonl(test_stateid->ts_num_ids);
Bryan Schumaker17456802011-07-13 10:50:48 -04004053
Bryan Schumaker03cfb422012-01-27 10:22:49 -05004054 list_for_each_entry_safe(stateid, next, &test_stateid->ts_stateid_list, ts_id_list) {
Al Viro02f5fde2012-04-13 00:10:34 -04004055 *p++ = stateid->ts_id_status;
Bryan Schumaker17456802011-07-13 10:50:48 -04004056 }
Bryan Schumaker17456802011-07-13 10:50:48 -04004057
4058 return nfserr;
4059}
4060
Christoph Hellwig9cf514c2014-05-05 13:11:59 +02004061#ifdef CONFIG_NFSD_PNFS
4062static __be32
4063nfsd4_encode_getdeviceinfo(struct nfsd4_compoundres *resp, __be32 nfserr,
4064 struct nfsd4_getdeviceinfo *gdev)
4065{
4066 struct xdr_stream *xdr = &resp->xdr;
4067 const struct nfsd4_layout_ops *ops =
4068 nfsd4_layout_ops[gdev->gd_layout_type];
4069 u32 starting_len = xdr->buf->len, needed_len;
4070 __be32 *p;
4071
4072 dprintk("%s: err %d\n", __func__, nfserr);
4073 if (nfserr)
4074 goto out;
4075
4076 nfserr = nfserr_resource;
4077 p = xdr_reserve_space(xdr, 4);
4078 if (!p)
4079 goto out;
4080
4081 *p++ = cpu_to_be32(gdev->gd_layout_type);
4082
4083 /* If maxcount is 0 then just update notifications */
4084 if (gdev->gd_maxcount != 0) {
4085 nfserr = ops->encode_getdeviceinfo(xdr, gdev);
4086 if (nfserr) {
4087 /*
4088 * We don't bother to burden the layout drivers with
4089 * enforcing gd_maxcount, just tell the client to
4090 * come back with a bigger buffer if it's not enough.
4091 */
4092 if (xdr->buf->len + 4 > gdev->gd_maxcount)
4093 goto toosmall;
4094 goto out;
4095 }
4096 }
4097
4098 nfserr = nfserr_resource;
4099 if (gdev->gd_notify_types) {
4100 p = xdr_reserve_space(xdr, 4 + 4);
4101 if (!p)
4102 goto out;
4103 *p++ = cpu_to_be32(1); /* bitmap length */
4104 *p++ = cpu_to_be32(gdev->gd_notify_types);
4105 } else {
4106 p = xdr_reserve_space(xdr, 4);
4107 if (!p)
4108 goto out;
4109 *p++ = 0;
4110 }
4111
4112 nfserr = 0;
4113out:
4114 kfree(gdev->gd_device);
4115 dprintk("%s: done: %d\n", __func__, be32_to_cpu(nfserr));
4116 return nfserr;
4117
4118toosmall:
4119 dprintk("%s: maxcount too small\n", __func__);
4120 needed_len = xdr->buf->len + 4 /* notifications */;
4121 xdr_truncate_encode(xdr, starting_len);
4122 p = xdr_reserve_space(xdr, 4);
4123 if (!p) {
4124 nfserr = nfserr_resource;
4125 } else {
4126 *p++ = cpu_to_be32(needed_len);
4127 nfserr = nfserr_toosmall;
4128 }
4129 goto out;
4130}
4131
4132static __be32
4133nfsd4_encode_layoutget(struct nfsd4_compoundres *resp, __be32 nfserr,
4134 struct nfsd4_layoutget *lgp)
4135{
4136 struct xdr_stream *xdr = &resp->xdr;
4137 const struct nfsd4_layout_ops *ops =
4138 nfsd4_layout_ops[lgp->lg_layout_type];
4139 __be32 *p;
4140
4141 dprintk("%s: err %d\n", __func__, nfserr);
4142 if (nfserr)
4143 goto out;
4144
4145 nfserr = nfserr_resource;
4146 p = xdr_reserve_space(xdr, 36 + sizeof(stateid_opaque_t));
4147 if (!p)
4148 goto out;
4149
4150 *p++ = cpu_to_be32(1); /* we always set return-on-close */
4151 *p++ = cpu_to_be32(lgp->lg_sid.si_generation);
4152 p = xdr_encode_opaque_fixed(p, &lgp->lg_sid.si_opaque,
4153 sizeof(stateid_opaque_t));
4154
4155 *p++ = cpu_to_be32(1); /* we always return a single layout */
4156 p = xdr_encode_hyper(p, lgp->lg_seg.offset);
4157 p = xdr_encode_hyper(p, lgp->lg_seg.length);
4158 *p++ = cpu_to_be32(lgp->lg_seg.iomode);
4159 *p++ = cpu_to_be32(lgp->lg_layout_type);
4160
4161 nfserr = ops->encode_layoutget(xdr, lgp);
4162out:
4163 kfree(lgp->lg_content);
4164 return nfserr;
4165}
4166
4167static __be32
4168nfsd4_encode_layoutcommit(struct nfsd4_compoundres *resp, __be32 nfserr,
4169 struct nfsd4_layoutcommit *lcp)
4170{
4171 struct xdr_stream *xdr = &resp->xdr;
4172 __be32 *p;
4173
4174 if (nfserr)
4175 return nfserr;
4176
4177 p = xdr_reserve_space(xdr, 4);
4178 if (!p)
4179 return nfserr_resource;
4180 *p++ = cpu_to_be32(lcp->lc_size_chg);
4181 if (lcp->lc_size_chg) {
4182 p = xdr_reserve_space(xdr, 8);
4183 if (!p)
4184 return nfserr_resource;
4185 p = xdr_encode_hyper(p, lcp->lc_newsize);
4186 }
4187
4188 return nfs_ok;
4189}
4190
4191static __be32
4192nfsd4_encode_layoutreturn(struct nfsd4_compoundres *resp, __be32 nfserr,
4193 struct nfsd4_layoutreturn *lrp)
4194{
4195 struct xdr_stream *xdr = &resp->xdr;
4196 __be32 *p;
4197
4198 if (nfserr)
4199 return nfserr;
4200
4201 p = xdr_reserve_space(xdr, 4);
4202 if (!p)
4203 return nfserr_resource;
4204 *p++ = cpu_to_be32(lrp->lrs_present);
4205 if (lrp->lrs_present)
Kinglong Mee376675d2015-03-22 22:17:10 +08004206 return nfsd4_encode_stateid(xdr, &lrp->lr_sid);
Christoph Hellwig9cf514c2014-05-05 13:11:59 +02004207 return nfs_ok;
4208}
4209#endif /* CONFIG_NFSD_PNFS */
4210
Andy Adamson2db134e2009-04-03 08:27:55 +03004211static __be32
Anna Schumaker24bab492014-09-26 13:58:27 -04004212nfsd4_encode_seek(struct nfsd4_compoundres *resp, __be32 nfserr,
4213 struct nfsd4_seek *seek)
4214{
4215 __be32 *p;
4216
4217 if (nfserr)
4218 return nfserr;
4219
4220 p = xdr_reserve_space(&resp->xdr, 4 + 8);
4221 *p++ = cpu_to_be32(seek->seek_eof);
4222 p = xdr_encode_hyper(p, seek->seek_pos);
4223
4224 return nfserr;
4225}
4226
4227static __be32
Benny Halevy695e12f2008-07-04 14:38:33 +03004228nfsd4_encode_noop(struct nfsd4_compoundres *resp, __be32 nfserr, void *p)
4229{
4230 return nfserr;
4231}
4232
4233typedef __be32(* nfsd4_enc)(struct nfsd4_compoundres *, __be32, void *);
4234
Andy Adamson2db134e2009-04-03 08:27:55 +03004235/*
4236 * Note: nfsd4_enc_ops vector is shared for v4.0 and v4.1
4237 * since we don't need to filter out obsolete ops as this is
4238 * done in the decoding phase.
4239 */
Benny Halevy695e12f2008-07-04 14:38:33 +03004240static nfsd4_enc nfsd4_enc_ops[] = {
J. Bruce Fieldsad1060c2008-07-18 15:04:16 -04004241 [OP_ACCESS] = (nfsd4_enc)nfsd4_encode_access,
4242 [OP_CLOSE] = (nfsd4_enc)nfsd4_encode_close,
4243 [OP_COMMIT] = (nfsd4_enc)nfsd4_encode_commit,
4244 [OP_CREATE] = (nfsd4_enc)nfsd4_encode_create,
4245 [OP_DELEGPURGE] = (nfsd4_enc)nfsd4_encode_noop,
4246 [OP_DELEGRETURN] = (nfsd4_enc)nfsd4_encode_noop,
4247 [OP_GETATTR] = (nfsd4_enc)nfsd4_encode_getattr,
4248 [OP_GETFH] = (nfsd4_enc)nfsd4_encode_getfh,
4249 [OP_LINK] = (nfsd4_enc)nfsd4_encode_link,
4250 [OP_LOCK] = (nfsd4_enc)nfsd4_encode_lock,
4251 [OP_LOCKT] = (nfsd4_enc)nfsd4_encode_lockt,
4252 [OP_LOCKU] = (nfsd4_enc)nfsd4_encode_locku,
4253 [OP_LOOKUP] = (nfsd4_enc)nfsd4_encode_noop,
4254 [OP_LOOKUPP] = (nfsd4_enc)nfsd4_encode_noop,
4255 [OP_NVERIFY] = (nfsd4_enc)nfsd4_encode_noop,
4256 [OP_OPEN] = (nfsd4_enc)nfsd4_encode_open,
Benny Halevy84f09f42009-03-04 23:05:35 +02004257 [OP_OPENATTR] = (nfsd4_enc)nfsd4_encode_noop,
J. Bruce Fieldsad1060c2008-07-18 15:04:16 -04004258 [OP_OPEN_CONFIRM] = (nfsd4_enc)nfsd4_encode_open_confirm,
4259 [OP_OPEN_DOWNGRADE] = (nfsd4_enc)nfsd4_encode_open_downgrade,
4260 [OP_PUTFH] = (nfsd4_enc)nfsd4_encode_noop,
4261 [OP_PUTPUBFH] = (nfsd4_enc)nfsd4_encode_noop,
4262 [OP_PUTROOTFH] = (nfsd4_enc)nfsd4_encode_noop,
4263 [OP_READ] = (nfsd4_enc)nfsd4_encode_read,
4264 [OP_READDIR] = (nfsd4_enc)nfsd4_encode_readdir,
4265 [OP_READLINK] = (nfsd4_enc)nfsd4_encode_readlink,
4266 [OP_REMOVE] = (nfsd4_enc)nfsd4_encode_remove,
4267 [OP_RENAME] = (nfsd4_enc)nfsd4_encode_rename,
4268 [OP_RENEW] = (nfsd4_enc)nfsd4_encode_noop,
4269 [OP_RESTOREFH] = (nfsd4_enc)nfsd4_encode_noop,
4270 [OP_SAVEFH] = (nfsd4_enc)nfsd4_encode_noop,
4271 [OP_SECINFO] = (nfsd4_enc)nfsd4_encode_secinfo,
4272 [OP_SETATTR] = (nfsd4_enc)nfsd4_encode_setattr,
4273 [OP_SETCLIENTID] = (nfsd4_enc)nfsd4_encode_setclientid,
4274 [OP_SETCLIENTID_CONFIRM] = (nfsd4_enc)nfsd4_encode_noop,
4275 [OP_VERIFY] = (nfsd4_enc)nfsd4_encode_noop,
4276 [OP_WRITE] = (nfsd4_enc)nfsd4_encode_write,
4277 [OP_RELEASE_LOCKOWNER] = (nfsd4_enc)nfsd4_encode_noop,
Andy Adamson2db134e2009-04-03 08:27:55 +03004278
4279 /* NFSv4.1 operations */
4280 [OP_BACKCHANNEL_CTL] = (nfsd4_enc)nfsd4_encode_noop,
J. Bruce Fields1d1bc8f2010-10-04 23:12:59 -04004281 [OP_BIND_CONN_TO_SESSION] = (nfsd4_enc)nfsd4_encode_bind_conn_to_session,
Andy Adamson2db134e2009-04-03 08:27:55 +03004282 [OP_EXCHANGE_ID] = (nfsd4_enc)nfsd4_encode_exchange_id,
4283 [OP_CREATE_SESSION] = (nfsd4_enc)nfsd4_encode_create_session,
Kinglong Mee43212cc2013-12-09 19:04:23 +08004284 [OP_DESTROY_SESSION] = (nfsd4_enc)nfsd4_encode_noop,
4285 [OP_FREE_STATEID] = (nfsd4_enc)nfsd4_encode_noop,
Andy Adamson2db134e2009-04-03 08:27:55 +03004286 [OP_GET_DIR_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop,
Christoph Hellwig9cf514c2014-05-05 13:11:59 +02004287#ifdef CONFIG_NFSD_PNFS
4288 [OP_GETDEVICEINFO] = (nfsd4_enc)nfsd4_encode_getdeviceinfo,
4289 [OP_GETDEVICELIST] = (nfsd4_enc)nfsd4_encode_noop,
4290 [OP_LAYOUTCOMMIT] = (nfsd4_enc)nfsd4_encode_layoutcommit,
4291 [OP_LAYOUTGET] = (nfsd4_enc)nfsd4_encode_layoutget,
4292 [OP_LAYOUTRETURN] = (nfsd4_enc)nfsd4_encode_layoutreturn,
4293#else
Andy Adamson2db134e2009-04-03 08:27:55 +03004294 [OP_GETDEVICEINFO] = (nfsd4_enc)nfsd4_encode_noop,
4295 [OP_GETDEVICELIST] = (nfsd4_enc)nfsd4_encode_noop,
4296 [OP_LAYOUTCOMMIT] = (nfsd4_enc)nfsd4_encode_noop,
4297 [OP_LAYOUTGET] = (nfsd4_enc)nfsd4_encode_noop,
4298 [OP_LAYOUTRETURN] = (nfsd4_enc)nfsd4_encode_noop,
Christoph Hellwig9cf514c2014-05-05 13:11:59 +02004299#endif
Mi Jinlong22b6dee2010-12-27 14:29:57 +08004300 [OP_SECINFO_NO_NAME] = (nfsd4_enc)nfsd4_encode_secinfo_no_name,
Andy Adamson2db134e2009-04-03 08:27:55 +03004301 [OP_SEQUENCE] = (nfsd4_enc)nfsd4_encode_sequence,
4302 [OP_SET_SSV] = (nfsd4_enc)nfsd4_encode_noop,
Bryan Schumaker17456802011-07-13 10:50:48 -04004303 [OP_TEST_STATEID] = (nfsd4_enc)nfsd4_encode_test_stateid,
Andy Adamson2db134e2009-04-03 08:27:55 +03004304 [OP_WANT_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop,
4305 [OP_DESTROY_CLIENTID] = (nfsd4_enc)nfsd4_encode_noop,
4306 [OP_RECLAIM_COMPLETE] = (nfsd4_enc)nfsd4_encode_noop,
Anna Schumaker87a15a82014-09-26 13:58:26 -04004307
4308 /* NFSv4.2 operations */
4309 [OP_ALLOCATE] = (nfsd4_enc)nfsd4_encode_noop,
4310 [OP_COPY] = (nfsd4_enc)nfsd4_encode_noop,
4311 [OP_COPY_NOTIFY] = (nfsd4_enc)nfsd4_encode_noop,
4312 [OP_DEALLOCATE] = (nfsd4_enc)nfsd4_encode_noop,
4313 [OP_IO_ADVISE] = (nfsd4_enc)nfsd4_encode_noop,
4314 [OP_LAYOUTERROR] = (nfsd4_enc)nfsd4_encode_noop,
4315 [OP_LAYOUTSTATS] = (nfsd4_enc)nfsd4_encode_noop,
4316 [OP_OFFLOAD_CANCEL] = (nfsd4_enc)nfsd4_encode_noop,
4317 [OP_OFFLOAD_STATUS] = (nfsd4_enc)nfsd4_encode_noop,
4318 [OP_READ_PLUS] = (nfsd4_enc)nfsd4_encode_noop,
Anna Schumaker24bab492014-09-26 13:58:27 -04004319 [OP_SEEK] = (nfsd4_enc)nfsd4_encode_seek,
Anna Schumaker87a15a82014-09-26 13:58:26 -04004320 [OP_WRITE_SAME] = (nfsd4_enc)nfsd4_encode_noop,
Christoph Hellwigffa01602015-12-03 12:59:52 +01004321 [OP_CLONE] = (nfsd4_enc)nfsd4_encode_noop,
Benny Halevy695e12f2008-07-04 14:38:33 +03004322};
4323
Andy Adamson496c2622009-04-03 08:28:48 +03004324/*
J. Bruce Fieldsa8095f72014-03-11 17:54:34 -04004325 * Calculate whether we still have space to encode repsize bytes.
4326 * There are two considerations:
4327 * - For NFS versions >=4.1, the size of the reply must stay within
4328 * session limits
4329 * - For all NFS versions, we must stay within limited preallocated
4330 * buffer space.
Andy Adamson496c2622009-04-03 08:28:48 +03004331 *
J. Bruce Fieldsa8095f72014-03-11 17:54:34 -04004332 * This is called before the operation is processed, so can only provide
4333 * an upper estimate. For some nonidempotent operations (such as
4334 * getattr), it's not necessarily a problem if that estimate is wrong,
4335 * as we can fail it after processing without significant side effects.
Andy Adamson496c2622009-04-03 08:28:48 +03004336 */
J. Bruce Fieldsa8095f72014-03-11 17:54:34 -04004337__be32 nfsd4_check_resp_size(struct nfsd4_compoundres *resp, u32 respsize)
Andy Adamson496c2622009-04-03 08:28:48 +03004338{
J. Bruce Fields67492c92014-03-08 16:42:05 -05004339 struct xdr_buf *buf = &resp->rqstp->rq_res;
J. Bruce Fields47ee5292014-03-12 21:39:35 -04004340 struct nfsd4_slot *slot = resp->cstate.slot;
Andy Adamson496c2622009-04-03 08:28:48 +03004341
J. Bruce Fields47ee5292014-03-12 21:39:35 -04004342 if (buf->len + respsize <= buf->buflen)
4343 return nfs_ok;
4344 if (!nfsd4_has_session(&resp->cstate))
J. Bruce Fieldsea8d7722014-03-08 17:19:55 -05004345 return nfserr_resource;
J. Bruce Fields47ee5292014-03-12 21:39:35 -04004346 if (slot->sl_flags & NFSD4_SLOT_CACHETHIS) {
4347 WARN_ON_ONCE(1);
4348 return nfserr_rep_too_big_to_cache;
J. Bruce Fieldsea8d7722014-03-08 17:19:55 -05004349 }
J. Bruce Fields47ee5292014-03-12 21:39:35 -04004350 return nfserr_rep_too_big;
Andy Adamson496c2622009-04-03 08:28:48 +03004351}
4352
Linus Torvalds1da177e2005-04-16 15:20:36 -07004353void
4354nfsd4_encode_operation(struct nfsd4_compoundres *resp, struct nfsd4_op *op)
4355{
J. Bruce Fields082d4bd2013-08-29 15:42:52 -04004356 struct xdr_stream *xdr = &resp->xdr;
J. Bruce Fields9411b1d2013-04-01 16:37:12 -04004357 struct nfs4_stateowner *so = resp->cstate.replay_owner;
J. Bruce Fields5f4ab942014-03-07 11:01:37 -05004358 struct svc_rqst *rqstp = resp->rqstp;
J. Bruce Fields082d4bd2013-08-29 15:42:52 -04004359 int post_err_offset;
J. Bruce Fields07d1f802014-03-06 20:39:29 -05004360 nfsd4_enc encoder;
J. Bruce Fieldsbc749ca2009-04-07 16:55:27 -07004361 __be32 *p;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004362
J. Bruce Fieldsd0a381d2014-01-30 17:18:38 -05004363 p = xdr_reserve_space(xdr, 8);
4364 if (!p) {
4365 WARN_ON_ONCE(1);
4366 return;
4367 }
J. Bruce Fieldsc373b0a2014-03-22 17:09:18 -04004368 *p++ = cpu_to_be32(op->opnum);
J. Bruce Fields082d4bd2013-08-29 15:42:52 -04004369 post_err_offset = xdr->buf->len;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004370
Benny Halevy695e12f2008-07-04 14:38:33 +03004371 if (op->opnum == OP_ILLEGAL)
4372 goto status;
4373 BUG_ON(op->opnum < 0 || op->opnum >= ARRAY_SIZE(nfsd4_enc_ops) ||
4374 !nfsd4_enc_ops[op->opnum]);
J. Bruce Fields07d1f802014-03-06 20:39:29 -05004375 encoder = nfsd4_enc_ops[op->opnum];
4376 op->status = encoder(resp, op->status, &op->u);
J. Bruce Fields2825a7f2013-08-26 16:04:46 -04004377 xdr_commit_encode(xdr);
4378
J. Bruce Fields067e1ac2014-03-21 17:26:44 -04004379 /* nfsd4_check_resp_size guarantees enough room for error status */
J. Bruce Fields5f4ab942014-03-07 11:01:37 -05004380 if (!op->status) {
4381 int space_needed = 0;
4382 if (!nfsd4_last_compound_op(rqstp))
4383 space_needed = COMPOUND_ERR_SLACK_SPACE;
4384 op->status = nfsd4_check_resp_size(resp, space_needed);
4385 }
J. Bruce Fieldsc8f13d92014-05-08 17:38:18 -04004386 if (op->status == nfserr_resource && nfsd4_has_session(&resp->cstate)) {
4387 struct nfsd4_slot *slot = resp->cstate.slot;
4388
4389 if (slot->sl_flags & NFSD4_SLOT_CACHETHIS)
4390 op->status = nfserr_rep_too_big_to_cache;
4391 else
4392 op->status = nfserr_rep_too_big;
4393 }
J. Bruce Fields07d1f802014-03-06 20:39:29 -05004394 if (op->status == nfserr_resource ||
4395 op->status == nfserr_rep_too_big ||
4396 op->status == nfserr_rep_too_big_to_cache) {
4397 /*
4398 * The operation may have already been encoded or
4399 * partially encoded. No op returns anything additional
4400 * in the case of one of these three errors, so we can
4401 * just truncate back to after the status. But it's a
4402 * bug if we had to do this on a non-idempotent op:
4403 */
4404 warn_on_nonidempotent_op(op);
J. Bruce Fields082d4bd2013-08-29 15:42:52 -04004405 xdr_truncate_encode(xdr, post_err_offset);
J. Bruce Fields07d1f802014-03-06 20:39:29 -05004406 }
J. Bruce Fields9411b1d2013-04-01 16:37:12 -04004407 if (so) {
J. Bruce Fields082d4bd2013-08-29 15:42:52 -04004408 int len = xdr->buf->len - post_err_offset;
4409
J. Bruce Fields9411b1d2013-04-01 16:37:12 -04004410 so->so_replay.rp_status = op->status;
J. Bruce Fields082d4bd2013-08-29 15:42:52 -04004411 so->so_replay.rp_buflen = len;
4412 read_bytes_from_xdr_buf(xdr->buf, post_err_offset,
4413 so->so_replay.rp_buf, len);
J. Bruce Fields9411b1d2013-04-01 16:37:12 -04004414 }
Benny Halevy695e12f2008-07-04 14:38:33 +03004415status:
J. Bruce Fields082d4bd2013-08-29 15:42:52 -04004416 /* Note that op->status is already in network byte order: */
4417 write_bytes_to_xdr_buf(xdr->buf, post_err_offset - 4, &op->status, 4);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004418}
4419
4420/*
4421 * Encode the reply stored in the stateowner reply cache
4422 *
4423 * XDR note: do not encode rp->rp_buflen: the buffer contains the
4424 * previously sent already encoded operation.
Linus Torvalds1da177e2005-04-16 15:20:36 -07004425 */
4426void
J. Bruce Fieldsd0a381d2014-01-30 17:18:38 -05004427nfsd4_encode_replay(struct xdr_stream *xdr, struct nfsd4_op *op)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004428{
J. Bruce Fieldsbc749ca2009-04-07 16:55:27 -07004429 __be32 *p;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004430 struct nfs4_replay *rp = op->replay;
4431
4432 BUG_ON(!rp);
4433
J. Bruce Fieldsd0a381d2014-01-30 17:18:38 -05004434 p = xdr_reserve_space(xdr, 8 + rp->rp_buflen);
4435 if (!p) {
4436 WARN_ON_ONCE(1);
4437 return;
4438 }
J. Bruce Fieldsc373b0a2014-03-22 17:09:18 -04004439 *p++ = cpu_to_be32(op->opnum);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004440 *p++ = rp->rp_status; /* already xdr'ed */
Linus Torvalds1da177e2005-04-16 15:20:36 -07004441
J. Bruce Fields0c0c2672014-03-22 18:43:16 -04004442 p = xdr_encode_opaque_fixed(p, rp->rp_buf, rp->rp_buflen);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004443}
4444
Linus Torvalds1da177e2005-04-16 15:20:36 -07004445int
Al Viro2ebbc012006-10-19 23:28:58 -07004446nfs4svc_encode_voidres(struct svc_rqst *rqstp, __be32 *p, void *dummy)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004447{
4448 return xdr_ressize_check(rqstp, p);
4449}
4450
J. Bruce Fields3e98abf2011-07-16 17:15:10 -04004451int nfsd4_release_compoundargs(void *rq, __be32 *p, void *resp)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004452{
J. Bruce Fields3e98abf2011-07-16 17:15:10 -04004453 struct svc_rqst *rqstp = rq;
4454 struct nfsd4_compoundargs *args = rqstp->rq_argp;
4455
Linus Torvalds1da177e2005-04-16 15:20:36 -07004456 if (args->ops != args->iops) {
4457 kfree(args->ops);
4458 args->ops = args->iops;
4459 }
Jesper Juhlf99d49a2005-11-07 01:01:34 -08004460 kfree(args->tmpp);
4461 args->tmpp = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004462 while (args->to_free) {
J. Bruce Fieldsd5e23382014-06-24 17:43:45 -04004463 struct svcxdr_tmpbuf *tb = args->to_free;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004464 args->to_free = tb->next;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004465 kfree(tb);
4466 }
J. Bruce Fields3e98abf2011-07-16 17:15:10 -04004467 return 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004468}
4469
4470int
Al Viro2ebbc012006-10-19 23:28:58 -07004471nfs4svc_decode_compoundargs(struct svc_rqst *rqstp, __be32 *p, struct nfsd4_compoundargs *args)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004472{
Jeff Laytone874f9f2014-03-10 11:34:55 -04004473 if (rqstp->rq_arg.head[0].iov_len % 4) {
4474 /* client is nuts */
4475 dprintk("%s: compound not properly padded! (peeraddr=%pISc xid=0x%x)",
4476 __func__, svc_addr(rqstp), be32_to_cpu(rqstp->rq_xid));
4477 return 0;
4478 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07004479 args->p = p;
4480 args->end = rqstp->rq_arg.head[0].iov_base + rqstp->rq_arg.head[0].iov_len;
4481 args->pagelist = rqstp->rq_arg.pages;
4482 args->pagelen = rqstp->rq_arg.page_len;
4483 args->tmpp = NULL;
4484 args->to_free = NULL;
4485 args->ops = args->iops;
4486 args->rqstp = rqstp;
4487
J. Bruce Fields3e98abf2011-07-16 17:15:10 -04004488 return !nfsd4_decode_compound(args);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004489}
4490
4491int
Al Viro2ebbc012006-10-19 23:28:58 -07004492nfs4svc_encode_compoundres(struct svc_rqst *rqstp, __be32 *p, struct nfsd4_compoundres *resp)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004493{
4494 /*
4495 * All that remains is to write the tag and operation count...
4496 */
J. Bruce Fields6ac90392014-02-26 17:39:35 -05004497 struct xdr_buf *buf = resp->xdr.buf;
4498
4499 WARN_ON_ONCE(buf->len != buf->head[0].iov_len + buf->page_len +
4500 buf->tail[0].iov_len);
J. Bruce Fieldsdd97fdd2014-02-26 17:16:27 -05004501
J. Bruce Fields2825a7f2013-08-26 16:04:46 -04004502 rqstp->rq_next_page = resp->xdr.page_ptr + 1;
4503
Linus Torvalds1da177e2005-04-16 15:20:36 -07004504 p = resp->tagp;
4505 *p++ = htonl(resp->taglen);
4506 memcpy(p, resp->tag, resp->taglen);
4507 p += XDR_QUADLEN(resp->taglen);
4508 *p++ = htonl(resp->opcnt);
4509
Trond Myklebustb6076642014-06-30 11:48:35 -04004510 nfsd4_sequence_done(resp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004511 return 1;
4512}
4513
4514/*
4515 * Local variables:
4516 * c-basic-offset: 8
4517 * End:
4518 */