blob: eeea7a90eb873d6d4d8b606ddf2584a1c3a9f85c [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
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090036#include <linux/slab.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070037#include <linux/namei.h>
Boaz Harrosh341eb182009-12-03 20:29:12 +020038#include <linux/statfs.h>
Andy Adamson0733d212009-04-03 08:28:01 +030039#include <linux/utsname.h>
Bryan Schumaker17456802011-07-13 10:50:48 -040040#include <linux/pagemap.h>
J. Bruce Fields4796f452007-07-17 04:04:51 -070041#include <linux/sunrpc/svcauth_gss.h>
Boaz Harrosh9a74af22009-12-03 20:30:56 +020042
J. Bruce Fields2ca72e12011-01-04 17:37:15 -050043#include "idmap.h"
44#include "acl.h"
Boaz Harrosh9a74af22009-12-03 20:30:56 +020045#include "xdr4.h"
J. Bruce Fields0a3adad2009-11-04 18:12:35 -050046#include "vfs.h"
Bryan Schumaker17456802011-07-13 10:50:48 -040047#include "state.h"
J. Bruce Fields10910062011-01-24 12:11:02 -050048#include "cache.h"
Stanislav Kinsbursky3d733712012-11-27 14:11:44 +030049#include "netns.h"
J. Bruce Fields2ca72e12011-01-04 17:37:15 -050050
David Quigley18032ca2013-05-02 13:19:10 -040051#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
52#include <linux/security.h>
53#endif
54
55
Linus Torvalds1da177e2005-04-16 15:20:36 -070056#define NFSDDBG_FACILITY NFSDDBG_XDR
57
J.Bruce Fields42ca0992006-10-04 02:16:20 -070058/*
59 * As per referral draft, the fsid for a referral MUST be different from the fsid of the containing
60 * directory in order to indicate to the client that a filesystem boundary is present
61 * We use a fixed fsid for a referral
62 */
63#define NFS4_REFERRAL_FSID_MAJOR 0x8000000ULL
64#define NFS4_REFERRAL_FSID_MINOR 0x8000000ULL
65
Al Virob37ad282006-10-19 23:28:59 -070066static __be32
J. Bruce Fieldsa36b1722012-11-25 16:31:00 -050067check_filename(char *str, int len)
Linus Torvalds1da177e2005-04-16 15:20:36 -070068{
69 int i;
70
71 if (len == 0)
72 return nfserr_inval;
73 if (isdotent(str, len))
J. Bruce Fieldsa36b1722012-11-25 16:31:00 -050074 return nfserr_badname;
Linus Torvalds1da177e2005-04-16 15:20:36 -070075 for (i = 0; i < len; i++)
76 if (str[i] == '/')
J. Bruce Fieldsa36b1722012-11-25 16:31:00 -050077 return nfserr_badname;
Linus Torvalds1da177e2005-04-16 15:20:36 -070078 return 0;
79}
80
Linus Torvalds1da177e2005-04-16 15:20:36 -070081#define DECODE_HEAD \
Al Viro2ebbc012006-10-19 23:28:58 -070082 __be32 *p; \
Al Virob37ad282006-10-19 23:28:59 -070083 __be32 status
Linus Torvalds1da177e2005-04-16 15:20:36 -070084#define DECODE_TAIL \
85 status = 0; \
86out: \
87 return status; \
88xdr_error: \
Chuck Lever817cb9d2007-09-11 18:01:20 -040089 dprintk("NFSD: xdr error (%s:%d)\n", \
90 __FILE__, __LINE__); \
Linus Torvalds1da177e2005-04-16 15:20:36 -070091 status = nfserr_bad_xdr; \
92 goto out
93
Linus Torvalds1da177e2005-04-16 15:20:36 -070094#define READMEM(x,nbytes) do { \
95 x = (char *)p; \
96 p += XDR_QUADLEN(nbytes); \
97} while (0)
98#define SAVEMEM(x,nbytes) do { \
99 if (!(x = (p==argp->tmp || p == argp->tmpp) ? \
100 savemem(argp, p, nbytes) : \
101 (char *)p)) { \
Chuck Lever817cb9d2007-09-11 18:01:20 -0400102 dprintk("NFSD: xdr error (%s:%d)\n", \
103 __FILE__, __LINE__); \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700104 goto xdr_error; \
105 } \
106 p += XDR_QUADLEN(nbytes); \
107} while (0)
108#define COPYMEM(x,nbytes) do { \
109 memcpy((x), p, nbytes); \
110 p += XDR_QUADLEN(nbytes); \
111} while (0)
112
113/* READ_BUF, read_buf(): nbytes must be <= PAGE_SIZE */
114#define READ_BUF(nbytes) do { \
115 if (nbytes <= (u32)((char *)argp->end - (char *)argp->p)) { \
116 p = argp->p; \
117 argp->p += XDR_QUADLEN(nbytes); \
118 } else if (!(p = read_buf(argp, nbytes))) { \
Chuck Lever817cb9d2007-09-11 18:01:20 -0400119 dprintk("NFSD: xdr error (%s:%d)\n", \
120 __FILE__, __LINE__); \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700121 goto xdr_error; \
122 } \
123} while (0)
124
J. Bruce Fields590b7432013-06-21 17:06:29 -0400125static void next_decode_page(struct nfsd4_compoundargs *argp)
126{
J. Bruce Fields590b7432013-06-21 17:06:29 -0400127 argp->p = page_address(argp->pagelist[0]);
J. Bruce Fields365da4a2013-11-19 17:32:43 -0500128 argp->pagelist++;
J. Bruce Fields590b7432013-06-21 17:06:29 -0400129 if (argp->pagelen < PAGE_SIZE) {
130 argp->end = argp->p + (argp->pagelen>>2);
131 argp->pagelen = 0;
132 } else {
133 argp->end = argp->p + (PAGE_SIZE>>2);
134 argp->pagelen -= PAGE_SIZE;
135 }
136}
137
J. Bruce Fieldsca2a05a2007-11-11 15:43:12 -0500138static __be32 *read_buf(struct nfsd4_compoundargs *argp, u32 nbytes)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700139{
140 /* We want more bytes than seem to be available.
141 * Maybe we need a new page, maybe we have just run out
142 */
J. Bruce Fieldsca2a05a2007-11-11 15:43:12 -0500143 unsigned int avail = (char *)argp->end - (char *)argp->p;
Al Viro2ebbc012006-10-19 23:28:58 -0700144 __be32 *p;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700145 if (avail + argp->pagelen < nbytes)
146 return NULL;
147 if (avail + PAGE_SIZE < nbytes) /* need more than a page !! */
148 return NULL;
149 /* ok, we can do it with the current plus the next page */
150 if (nbytes <= sizeof(argp->tmp))
151 p = argp->tmp;
152 else {
Jesper Juhlf99d49a2005-11-07 01:01:34 -0800153 kfree(argp->tmpp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700154 p = argp->tmpp = kmalloc(nbytes, GFP_KERNEL);
155 if (!p)
156 return NULL;
157
158 }
J. Bruce Fieldsca2a05a2007-11-11 15:43:12 -0500159 /*
160 * The following memcpy is safe because read_buf is always
161 * called with nbytes > avail, and the two cases above both
162 * guarantee p points to at least nbytes bytes.
163 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700164 memcpy(p, argp->p, avail);
J. Bruce Fields590b7432013-06-21 17:06:29 -0400165 next_decode_page(argp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700166 memcpy(((char*)p)+avail, argp->p, (nbytes - avail));
167 argp->p += XDR_QUADLEN(nbytes - avail);
168 return p;
169}
170
Andy Adamson60adfc52009-04-03 08:28:50 +0300171static int zero_clientid(clientid_t *clid)
172{
173 return (clid->cl_boot == 0) && (clid->cl_id == 0);
174}
175
Christoph Hellwig2d8498d2013-11-20 00:24:11 -0800176/**
J. Bruce Fieldsd5e23382014-06-24 17:43:45 -0400177 * svcxdr_tmpalloc - allocate memory to be freed after compound processing
J. Bruce Fieldsce043ac2014-06-24 16:51:12 -0400178 * @argp: NFSv4 compound argument structure
179 * @p: pointer to be freed (with kfree())
Christoph Hellwig2d8498d2013-11-20 00:24:11 -0800180 *
181 * Marks @p to be freed when processing the compound operation
182 * described in @argp finishes.
183 */
J. Bruce Fieldsd5e23382014-06-24 17:43:45 -0400184static void *
185svcxdr_tmpalloc(struct nfsd4_compoundargs *argp, u32 len)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700186{
J. Bruce Fieldsd5e23382014-06-24 17:43:45 -0400187 struct svcxdr_tmpbuf *tb;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700188
J. Bruce Fieldsd5e23382014-06-24 17:43:45 -0400189 tb = kmalloc(sizeof(*tb) + len, GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700190 if (!tb)
J. Bruce Fieldsd5e23382014-06-24 17:43:45 -0400191 return NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700192 tb->next = argp->to_free;
193 argp->to_free = tb;
J. Bruce Fieldsd5e23382014-06-24 17:43:45 -0400194 return tb->buf;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700195}
196
J. Bruce Fields29c353b2014-06-24 17:06:51 -0400197/*
198 * For xdr strings that need to be passed to other kernel api's
199 * as null-terminated strings.
200 *
201 * Note null-terminating in place usually isn't safe since the
202 * buffer might end on a page boundary.
203 */
204static char *
205svcxdr_dupstr(struct nfsd4_compoundargs *argp, void *buf, u32 len)
206{
J. Bruce Fieldsd5e23382014-06-24 17:43:45 -0400207 char *p = svcxdr_tmpalloc(argp, len + 1);
J. Bruce Fields29c353b2014-06-24 17:06:51 -0400208
209 if (!p)
210 return NULL;
211 memcpy(p, buf, len);
212 p[len] = '\0';
J. Bruce Fields29c353b2014-06-24 17:06:51 -0400213 return p;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700214}
215
Christoph Hellwig2d8498d2013-11-20 00:24:11 -0800216/**
217 * savemem - duplicate a chunk of memory for later processing
218 * @argp: NFSv4 compound argument structure to be freed with
219 * @p: pointer to be duplicated
220 * @nbytes: length to be duplicated
221 *
222 * Returns a pointer to a copy of @nbytes bytes of memory at @p
223 * that are preserved until processing of the NFSv4 compound
224 * operation described by @argp finishes.
225 */
Al Viro2ebbc012006-10-19 23:28:58 -0700226static char *savemem(struct nfsd4_compoundargs *argp, __be32 *p, int nbytes)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700227{
J. Bruce Fieldsd5e23382014-06-24 17:43:45 -0400228 void *ret;
229
230 ret = svcxdr_tmpalloc(argp, nbytes);
231 if (!ret)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700232 return NULL;
J. Bruce Fieldsd5e23382014-06-24 17:43:45 -0400233 memcpy(ret, p, nbytes);
234 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700235}
236
Al Virob37ad282006-10-19 23:28:59 -0700237static __be32
Linus Torvalds1da177e2005-04-16 15:20:36 -0700238nfsd4_decode_bitmap(struct nfsd4_compoundargs *argp, u32 *bmval)
239{
240 u32 bmlen;
241 DECODE_HEAD;
242
243 bmval[0] = 0;
244 bmval[1] = 0;
Andy Adamson7e705702009-04-03 08:29:11 +0300245 bmval[2] = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700246
247 READ_BUF(4);
J. Bruce Fields06553992014-06-02 12:32:51 -0400248 bmlen = be32_to_cpup(p++);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700249 if (bmlen > 1000)
250 goto xdr_error;
251
252 READ_BUF(bmlen << 2);
253 if (bmlen > 0)
J. Bruce Fields06553992014-06-02 12:32:51 -0400254 bmval[0] = be32_to_cpup(p++);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700255 if (bmlen > 1)
J. Bruce Fields06553992014-06-02 12:32:51 -0400256 bmval[1] = be32_to_cpup(p++);
Andy Adamson7e705702009-04-03 08:29:11 +0300257 if (bmlen > 2)
J. Bruce Fields06553992014-06-02 12:32:51 -0400258 bmval[2] = be32_to_cpup(p++);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700259
260 DECODE_TAIL;
261}
262
Al Virob37ad282006-10-19 23:28:59 -0700263static __be32
Yu Zhiguo3c8e0312009-05-16 16:22:31 +0800264nfsd4_decode_fattr(struct nfsd4_compoundargs *argp, u32 *bmval,
David Quigley18032ca2013-05-02 13:19:10 -0400265 struct iattr *iattr, struct nfs4_acl **acl,
266 struct xdr_netobj *label)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700267{
268 int expected_len, len = 0;
269 u32 dummy32;
J. Bruce Fields542d1ab2014-06-02 12:45:31 -0400270 u64 sec;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700271 char *buf;
272
273 DECODE_HEAD;
274 iattr->ia_valid = 0;
275 if ((status = nfsd4_decode_bitmap(argp, bmval)))
276 return status;
277
Linus Torvalds1da177e2005-04-16 15:20:36 -0700278 READ_BUF(4);
J. Bruce Fields06553992014-06-02 12:32:51 -0400279 expected_len = be32_to_cpup(p++);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700280
281 if (bmval[0] & FATTR4_WORD0_SIZE) {
282 READ_BUF(8);
283 len += 8;
J. Bruce Fields542d1ab2014-06-02 12:45:31 -0400284 p = xdr_decode_hyper(p, &iattr->ia_size);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700285 iattr->ia_valid |= ATTR_SIZE;
286 }
287 if (bmval[0] & FATTR4_WORD0_ACL) {
J. Bruce Fields64a817c2013-03-26 14:11:13 -0400288 u32 nace;
J. Bruce Fields28e05dd2007-02-16 01:28:30 -0800289 struct nfs4_ace *ace;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700290
291 READ_BUF(4); len += 4;
J. Bruce Fields06553992014-06-02 12:32:51 -0400292 nace = be32_to_cpup(p++);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700293
J. Bruce Fields28e05dd2007-02-16 01:28:30 -0800294 if (nace > NFS4_ACL_MAX)
J. Bruce Fields798df332014-01-29 16:39:05 -0500295 return nfserr_fbig;
J. Bruce Fields28e05dd2007-02-16 01:28:30 -0800296
J. Bruce Fieldsd5e23382014-06-24 17:43:45 -0400297 *acl = svcxdr_tmpalloc(argp, nfs4_acl_bytes(nace));
Kinglong Meeeba1c992013-12-09 18:23:46 +0800298 if (*acl == NULL)
299 return nfserr_jukebox;
300
J. Bruce Fields28e05dd2007-02-16 01:28:30 -0800301 (*acl)->naces = nace;
302 for (ace = (*acl)->aces; ace < (*acl)->aces + nace; ace++) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700303 READ_BUF(16); len += 16;
J. Bruce Fields06553992014-06-02 12:32:51 -0400304 ace->type = be32_to_cpup(p++);
305 ace->flag = be32_to_cpup(p++);
306 ace->access_mask = be32_to_cpup(p++);
307 dummy32 = be32_to_cpup(p++);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700308 READ_BUF(dummy32);
309 len += XDR_QUADLEN(dummy32) << 2;
310 READMEM(buf, dummy32);
J. Bruce Fields28e05dd2007-02-16 01:28:30 -0800311 ace->whotype = nfs4_acl_get_whotype(buf, dummy32);
J. Bruce Fields3c726022011-01-04 17:53:52 -0500312 status = nfs_ok;
J. Bruce Fields28e05dd2007-02-16 01:28:30 -0800313 if (ace->whotype != NFS4_ACL_WHO_NAMED)
Eric W. Biedermanab8e4ae2013-02-02 05:18:08 -0800314 ;
J. Bruce Fields28e05dd2007-02-16 01:28:30 -0800315 else if (ace->flag & NFS4_ACE_IDENTIFIER_GROUP)
J. Bruce Fields3c726022011-01-04 17:53:52 -0500316 status = nfsd_map_name_to_gid(argp->rqstp,
Eric W. Biedermanab8e4ae2013-02-02 05:18:08 -0800317 buf, dummy32, &ace->who_gid);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700318 else
J. Bruce Fields3c726022011-01-04 17:53:52 -0500319 status = nfsd_map_name_to_uid(argp->rqstp,
Eric W. Biedermanab8e4ae2013-02-02 05:18:08 -0800320 buf, dummy32, &ace->who_uid);
J. Bruce Fields3c726022011-01-04 17:53:52 -0500321 if (status)
322 return status;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700323 }
324 } else
325 *acl = NULL;
326 if (bmval[1] & FATTR4_WORD1_MODE) {
327 READ_BUF(4);
328 len += 4;
J. Bruce Fields06553992014-06-02 12:32:51 -0400329 iattr->ia_mode = be32_to_cpup(p++);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700330 iattr->ia_mode &= (S_IFMT | S_IALLUGO);
331 iattr->ia_valid |= ATTR_MODE;
332 }
333 if (bmval[1] & FATTR4_WORD1_OWNER) {
334 READ_BUF(4);
335 len += 4;
J. Bruce Fields06553992014-06-02 12:32:51 -0400336 dummy32 = be32_to_cpup(p++);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700337 READ_BUF(dummy32);
338 len += (XDR_QUADLEN(dummy32) << 2);
339 READMEM(buf, dummy32);
NeilBrown47c85292011-02-16 13:08:35 +1100340 if ((status = nfsd_map_name_to_uid(argp->rqstp, buf, dummy32, &iattr->ia_uid)))
341 return status;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700342 iattr->ia_valid |= ATTR_UID;
343 }
344 if (bmval[1] & FATTR4_WORD1_OWNER_GROUP) {
345 READ_BUF(4);
346 len += 4;
J. Bruce Fields06553992014-06-02 12:32:51 -0400347 dummy32 = be32_to_cpup(p++);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700348 READ_BUF(dummy32);
349 len += (XDR_QUADLEN(dummy32) << 2);
350 READMEM(buf, dummy32);
NeilBrown47c85292011-02-16 13:08:35 +1100351 if ((status = nfsd_map_name_to_gid(argp->rqstp, buf, dummy32, &iattr->ia_gid)))
352 return status;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700353 iattr->ia_valid |= ATTR_GID;
354 }
355 if (bmval[1] & FATTR4_WORD1_TIME_ACCESS_SET) {
356 READ_BUF(4);
357 len += 4;
J. Bruce Fields06553992014-06-02 12:32:51 -0400358 dummy32 = be32_to_cpup(p++);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700359 switch (dummy32) {
360 case NFS4_SET_TO_CLIENT_TIME:
361 /* We require the high 32 bits of 'seconds' to be 0, and we ignore
362 all 32 bits of 'nseconds'. */
363 READ_BUF(12);
364 len += 12;
J. Bruce Fields542d1ab2014-06-02 12:45:31 -0400365 p = xdr_decode_hyper(p, &sec);
366 iattr->ia_atime.tv_sec = (time_t)sec;
J. Bruce Fields06553992014-06-02 12:32:51 -0400367 iattr->ia_atime.tv_nsec = be32_to_cpup(p++);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700368 if (iattr->ia_atime.tv_nsec >= (u32)1000000000)
369 return nfserr_inval;
370 iattr->ia_valid |= (ATTR_ATIME | ATTR_ATIME_SET);
371 break;
372 case NFS4_SET_TO_SERVER_TIME:
373 iattr->ia_valid |= ATTR_ATIME;
374 break;
375 default:
376 goto xdr_error;
377 }
378 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700379 if (bmval[1] & FATTR4_WORD1_TIME_MODIFY_SET) {
380 READ_BUF(4);
381 len += 4;
J. Bruce Fields06553992014-06-02 12:32:51 -0400382 dummy32 = be32_to_cpup(p++);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700383 switch (dummy32) {
384 case NFS4_SET_TO_CLIENT_TIME:
385 /* We require the high 32 bits of 'seconds' to be 0, and we ignore
386 all 32 bits of 'nseconds'. */
387 READ_BUF(12);
388 len += 12;
J. Bruce Fields542d1ab2014-06-02 12:45:31 -0400389 p = xdr_decode_hyper(p, &sec);
390 iattr->ia_mtime.tv_sec = sec;
J. Bruce Fields06553992014-06-02 12:32:51 -0400391 iattr->ia_mtime.tv_nsec = be32_to_cpup(p++);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700392 if (iattr->ia_mtime.tv_nsec >= (u32)1000000000)
393 return nfserr_inval;
394 iattr->ia_valid |= (ATTR_MTIME | ATTR_MTIME_SET);
395 break;
396 case NFS4_SET_TO_SERVER_TIME:
397 iattr->ia_valid |= ATTR_MTIME;
398 break;
399 default:
400 goto xdr_error;
401 }
402 }
David Quigley18032ca2013-05-02 13:19:10 -0400403
404 label->len = 0;
405#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
406 if (bmval[2] & FATTR4_WORD2_SECURITY_LABEL) {
407 READ_BUF(4);
408 len += 4;
J. Bruce Fields06553992014-06-02 12:32:51 -0400409 dummy32 = be32_to_cpup(p++); /* lfs: we don't use it */
David Quigley18032ca2013-05-02 13:19:10 -0400410 READ_BUF(4);
411 len += 4;
J. Bruce Fields06553992014-06-02 12:32:51 -0400412 dummy32 = be32_to_cpup(p++); /* pi: we don't use it either */
David Quigley18032ca2013-05-02 13:19:10 -0400413 READ_BUF(4);
414 len += 4;
J. Bruce Fields06553992014-06-02 12:32:51 -0400415 dummy32 = be32_to_cpup(p++);
David Quigley18032ca2013-05-02 13:19:10 -0400416 READ_BUF(dummy32);
417 if (dummy32 > NFSD4_MAX_SEC_LABEL_LEN)
418 return nfserr_badlabel;
419 len += (XDR_QUADLEN(dummy32) << 2);
420 READMEM(buf, dummy32);
J. Bruce Fields29c353b2014-06-24 17:06:51 -0400421 label->len = dummy32;
422 label->data = svcxdr_dupstr(argp, buf, dummy32);
David Quigley18032ca2013-05-02 13:19:10 -0400423 if (!label->data)
424 return nfserr_jukebox;
David Quigley18032ca2013-05-02 13:19:10 -0400425 }
426#endif
427
Yu Zhiguo3c8e0312009-05-16 16:22:31 +0800428 if (bmval[0] & ~NFSD_WRITEABLE_ATTRS_WORD0
429 || bmval[1] & ~NFSD_WRITEABLE_ATTRS_WORD1
430 || bmval[2] & ~NFSD_WRITEABLE_ATTRS_WORD2)
431 READ_BUF(expected_len - len);
432 else if (len != expected_len)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700433 goto xdr_error;
434
435 DECODE_TAIL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700436}
437
Al Virob37ad282006-10-19 23:28:59 -0700438static __be32
Benny Halevye31a1b62008-08-12 20:46:18 +0300439nfsd4_decode_stateid(struct nfsd4_compoundargs *argp, stateid_t *sid)
440{
441 DECODE_HEAD;
442
443 READ_BUF(sizeof(stateid_t));
J. Bruce Fields06553992014-06-02 12:32:51 -0400444 sid->si_generation = be32_to_cpup(p++);
Benny Halevye31a1b62008-08-12 20:46:18 +0300445 COPYMEM(&sid->si_opaque, sizeof(stateid_opaque_t));
446
447 DECODE_TAIL;
448}
449
450static __be32
Linus Torvalds1da177e2005-04-16 15:20:36 -0700451nfsd4_decode_access(struct nfsd4_compoundargs *argp, struct nfsd4_access *access)
452{
453 DECODE_HEAD;
454
455 READ_BUF(4);
J. Bruce Fields06553992014-06-02 12:32:51 -0400456 access->ac_req_access = be32_to_cpup(p++);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700457
458 DECODE_TAIL;
459}
460
J. Bruce Fieldsacb28872012-03-27 14:50:26 -0400461static __be32 nfsd4_decode_cb_sec(struct nfsd4_compoundargs *argp, struct nfsd4_cb_sec *cbs)
462{
463 DECODE_HEAD;
J. Bruce Fields12fc3e92012-11-05 16:01:48 -0500464 u32 dummy, uid, gid;
J. Bruce Fieldsacb28872012-03-27 14:50:26 -0400465 char *machine_name;
466 int i;
467 int nr_secflavs;
468
469 /* callback_sec_params4 */
470 READ_BUF(4);
J. Bruce Fields06553992014-06-02 12:32:51 -0400471 nr_secflavs = be32_to_cpup(p++);
J. Bruce Fields57569a72013-05-17 16:25:32 -0400472 if (nr_secflavs)
473 cbs->flavor = (u32)(-1);
474 else
475 /* Is this legal? Be generous, take it to mean AUTH_NONE: */
476 cbs->flavor = 0;
J. Bruce Fieldsacb28872012-03-27 14:50:26 -0400477 for (i = 0; i < nr_secflavs; ++i) {
478 READ_BUF(4);
J. Bruce Fields06553992014-06-02 12:32:51 -0400479 dummy = be32_to_cpup(p++);
J. Bruce Fieldsacb28872012-03-27 14:50:26 -0400480 switch (dummy) {
481 case RPC_AUTH_NULL:
482 /* Nothing to read */
J. Bruce Fields12fc3e92012-11-05 16:01:48 -0500483 if (cbs->flavor == (u32)(-1))
484 cbs->flavor = RPC_AUTH_NULL;
J. Bruce Fieldsacb28872012-03-27 14:50:26 -0400485 break;
486 case RPC_AUTH_UNIX:
487 READ_BUF(8);
488 /* stamp */
J. Bruce Fields06553992014-06-02 12:32:51 -0400489 dummy = be32_to_cpup(p++);
J. Bruce Fieldsacb28872012-03-27 14:50:26 -0400490
491 /* machine name */
J. Bruce Fields06553992014-06-02 12:32:51 -0400492 dummy = be32_to_cpup(p++);
J. Bruce Fieldsacb28872012-03-27 14:50:26 -0400493 READ_BUF(dummy);
494 SAVEMEM(machine_name, dummy);
495
496 /* uid, gid */
497 READ_BUF(8);
J. Bruce Fields06553992014-06-02 12:32:51 -0400498 uid = be32_to_cpup(p++);
499 gid = be32_to_cpup(p++);
J. Bruce Fieldsacb28872012-03-27 14:50:26 -0400500
501 /* more gids */
502 READ_BUF(4);
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 * 4);
J. Bruce Fields12fc3e92012-11-05 16:01:48 -0500505 if (cbs->flavor == (u32)(-1)) {
Eric W. Biederman03bc6d12013-02-02 06:24:49 -0800506 kuid_t kuid = make_kuid(&init_user_ns, uid);
507 kgid_t kgid = make_kgid(&init_user_ns, gid);
508 if (uid_valid(kuid) && gid_valid(kgid)) {
509 cbs->uid = kuid;
510 cbs->gid = kgid;
511 cbs->flavor = RPC_AUTH_UNIX;
512 } else {
513 dprintk("RPC_AUTH_UNIX with invalid"
514 "uid or gid ignoring!\n");
515 }
J. Bruce Fields12fc3e92012-11-05 16:01:48 -0500516 }
J. Bruce Fieldsacb28872012-03-27 14:50:26 -0400517 break;
518 case RPC_AUTH_GSS:
519 dprintk("RPC_AUTH_GSS callback secflavor "
520 "not supported!\n");
521 READ_BUF(8);
522 /* gcbp_service */
J. Bruce Fields06553992014-06-02 12:32:51 -0400523 dummy = be32_to_cpup(p++);
J. Bruce Fieldsacb28872012-03-27 14:50:26 -0400524 /* gcbp_handle_from_server */
J. Bruce Fields06553992014-06-02 12:32:51 -0400525 dummy = be32_to_cpup(p++);
J. Bruce Fieldsacb28872012-03-27 14:50:26 -0400526 READ_BUF(dummy);
527 p += XDR_QUADLEN(dummy);
528 /* gcbp_handle_from_client */
529 READ_BUF(4);
J. Bruce Fields06553992014-06-02 12:32:51 -0400530 dummy = be32_to_cpup(p++);
J. Bruce Fieldsacb28872012-03-27 14:50:26 -0400531 READ_BUF(dummy);
532 break;
533 default:
534 dprintk("Illegal callback secflavor\n");
535 return nfserr_inval;
536 }
537 }
538 DECODE_TAIL;
539}
540
J. Bruce Fieldscb73a9f2012-11-01 18:09:48 -0400541static __be32 nfsd4_decode_backchannel_ctl(struct nfsd4_compoundargs *argp, struct nfsd4_backchannel_ctl *bc)
542{
543 DECODE_HEAD;
544
545 READ_BUF(4);
J. Bruce Fields06553992014-06-02 12:32:51 -0400546 bc->bc_cb_program = be32_to_cpup(p++);
J. Bruce Fieldscb73a9f2012-11-01 18:09:48 -0400547 nfsd4_decode_cb_sec(argp, &bc->bc_cb_sec);
548
549 DECODE_TAIL;
550}
551
J. Bruce Fields1d1bc8f2010-10-04 23:12:59 -0400552static __be32 nfsd4_decode_bind_conn_to_session(struct nfsd4_compoundargs *argp, struct nfsd4_bind_conn_to_session *bcts)
553{
554 DECODE_HEAD;
J. Bruce Fields1d1bc8f2010-10-04 23:12:59 -0400555
556 READ_BUF(NFS4_MAX_SESSIONID_LEN + 8);
557 COPYMEM(bcts->sessionid.data, NFS4_MAX_SESSIONID_LEN);
J. Bruce Fields06553992014-06-02 12:32:51 -0400558 bcts->dir = be32_to_cpup(p++);
Bryan Schumaker6ce23572011-04-27 15:47:16 -0400559 /* XXX: skipping ctsa_use_conn_in_rdma_mode. Perhaps Tom Tucker
560 * could help us figure out we should be using it. */
J. Bruce Fields1d1bc8f2010-10-04 23:12:59 -0400561 DECODE_TAIL;
562}
563
Al Virob37ad282006-10-19 23:28:59 -0700564static __be32
Linus Torvalds1da177e2005-04-16 15:20:36 -0700565nfsd4_decode_close(struct nfsd4_compoundargs *argp, struct nfsd4_close *close)
566{
567 DECODE_HEAD;
568
Benny Halevye31a1b62008-08-12 20:46:18 +0300569 READ_BUF(4);
J. Bruce Fields06553992014-06-02 12:32:51 -0400570 close->cl_seqid = be32_to_cpup(p++);
Benny Halevye31a1b62008-08-12 20:46:18 +0300571 return nfsd4_decode_stateid(argp, &close->cl_stateid);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700572
573 DECODE_TAIL;
574}
575
576
Al Virob37ad282006-10-19 23:28:59 -0700577static __be32
Linus Torvalds1da177e2005-04-16 15:20:36 -0700578nfsd4_decode_commit(struct nfsd4_compoundargs *argp, struct nfsd4_commit *commit)
579{
580 DECODE_HEAD;
581
582 READ_BUF(12);
J. Bruce Fields542d1ab2014-06-02 12:45:31 -0400583 p = xdr_decode_hyper(p, &commit->co_offset);
J. Bruce Fields06553992014-06-02 12:32:51 -0400584 commit->co_count = be32_to_cpup(p++);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700585
586 DECODE_TAIL;
587}
588
Al Virob37ad282006-10-19 23:28:59 -0700589static __be32
Linus Torvalds1da177e2005-04-16 15:20:36 -0700590nfsd4_decode_create(struct nfsd4_compoundargs *argp, struct nfsd4_create *create)
591{
592 DECODE_HEAD;
593
594 READ_BUF(4);
J. Bruce Fields06553992014-06-02 12:32:51 -0400595 create->cr_type = be32_to_cpup(p++);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700596 switch (create->cr_type) {
597 case NF4LNK:
598 READ_BUF(4);
J. Bruce Fields7fb84302014-06-24 15:06:41 -0400599 create->cr_datalen = be32_to_cpup(p++);
600 READ_BUF(create->cr_datalen);
J. Bruce Fields29c353b2014-06-24 17:06:51 -0400601 create->cr_data = svcxdr_dupstr(argp, p, create->cr_datalen);
J. Bruce Fields7fb84302014-06-24 15:06:41 -0400602 if (!create->cr_data)
J. Bruce Fields76f471282014-06-19 16:44:48 -0400603 return nfserr_jukebox;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700604 break;
605 case NF4BLK:
606 case NF4CHR:
607 READ_BUF(8);
J. Bruce Fields06553992014-06-02 12:32:51 -0400608 create->cr_specdata1 = be32_to_cpup(p++);
609 create->cr_specdata2 = be32_to_cpup(p++);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700610 break;
611 case NF4SOCK:
612 case NF4FIFO:
613 case NF4DIR:
614 default:
615 break;
616 }
617
618 READ_BUF(4);
J. Bruce Fields06553992014-06-02 12:32:51 -0400619 create->cr_namelen = be32_to_cpup(p++);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700620 READ_BUF(create->cr_namelen);
621 SAVEMEM(create->cr_name, create->cr_namelen);
J. Bruce Fieldsa36b1722012-11-25 16:31:00 -0500622 if ((status = check_filename(create->cr_name, create->cr_namelen)))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700623 return status;
624
Yu Zhiguo3c8e0312009-05-16 16:22:31 +0800625 status = nfsd4_decode_fattr(argp, create->cr_bmval, &create->cr_iattr,
David Quigley18032ca2013-05-02 13:19:10 -0400626 &create->cr_acl, &create->cr_label);
Benny Halevyc0d6fc82009-04-03 08:29:05 +0300627 if (status)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700628 goto out;
629
630 DECODE_TAIL;
631}
632
Al Virob37ad282006-10-19 23:28:59 -0700633static inline __be32
Linus Torvalds1da177e2005-04-16 15:20:36 -0700634nfsd4_decode_delegreturn(struct nfsd4_compoundargs *argp, struct nfsd4_delegreturn *dr)
635{
Benny Halevye31a1b62008-08-12 20:46:18 +0300636 return nfsd4_decode_stateid(argp, &dr->dr_stateid);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700637}
638
Al Virob37ad282006-10-19 23:28:59 -0700639static inline __be32
Linus Torvalds1da177e2005-04-16 15:20:36 -0700640nfsd4_decode_getattr(struct nfsd4_compoundargs *argp, struct nfsd4_getattr *getattr)
641{
642 return nfsd4_decode_bitmap(argp, getattr->ga_bmval);
643}
644
Al Virob37ad282006-10-19 23:28:59 -0700645static __be32
Linus Torvalds1da177e2005-04-16 15:20:36 -0700646nfsd4_decode_link(struct nfsd4_compoundargs *argp, struct nfsd4_link *link)
647{
648 DECODE_HEAD;
649
650 READ_BUF(4);
J. Bruce Fields06553992014-06-02 12:32:51 -0400651 link->li_namelen = be32_to_cpup(p++);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700652 READ_BUF(link->li_namelen);
653 SAVEMEM(link->li_name, link->li_namelen);
J. Bruce Fieldsa36b1722012-11-25 16:31:00 -0500654 if ((status = check_filename(link->li_name, link->li_namelen)))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700655 return status;
656
657 DECODE_TAIL;
658}
659
Al Virob37ad282006-10-19 23:28:59 -0700660static __be32
Linus Torvalds1da177e2005-04-16 15:20:36 -0700661nfsd4_decode_lock(struct nfsd4_compoundargs *argp, struct nfsd4_lock *lock)
662{
663 DECODE_HEAD;
664
Linus Torvalds1da177e2005-04-16 15:20:36 -0700665 /*
666 * type, reclaim(boolean), offset, length, new_lock_owner(boolean)
667 */
668 READ_BUF(28);
J. Bruce Fields06553992014-06-02 12:32:51 -0400669 lock->lk_type = be32_to_cpup(p++);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700670 if ((lock->lk_type < NFS4_READ_LT) || (lock->lk_type > NFS4_WRITEW_LT))
671 goto xdr_error;
J. Bruce Fields06553992014-06-02 12:32:51 -0400672 lock->lk_reclaim = be32_to_cpup(p++);
J. Bruce Fields542d1ab2014-06-02 12:45:31 -0400673 p = xdr_decode_hyper(p, &lock->lk_offset);
674 p = xdr_decode_hyper(p, &lock->lk_length);
J. Bruce Fields06553992014-06-02 12:32:51 -0400675 lock->lk_is_new = be32_to_cpup(p++);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700676
677 if (lock->lk_is_new) {
Benny Halevye31a1b62008-08-12 20:46:18 +0300678 READ_BUF(4);
J. Bruce Fields06553992014-06-02 12:32:51 -0400679 lock->lk_new_open_seqid = be32_to_cpup(p++);
Benny Halevye31a1b62008-08-12 20:46:18 +0300680 status = nfsd4_decode_stateid(argp, &lock->lk_new_open_stateid);
681 if (status)
682 return status;
683 READ_BUF(8 + sizeof(clientid_t));
J. Bruce Fields06553992014-06-02 12:32:51 -0400684 lock->lk_new_lock_seqid = be32_to_cpup(p++);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700685 COPYMEM(&lock->lk_new_clientid, sizeof(clientid_t));
J. Bruce Fields06553992014-06-02 12:32:51 -0400686 lock->lk_new_owner.len = be32_to_cpup(p++);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700687 READ_BUF(lock->lk_new_owner.len);
688 READMEM(lock->lk_new_owner.data, lock->lk_new_owner.len);
689 } else {
Benny Halevye31a1b62008-08-12 20:46:18 +0300690 status = nfsd4_decode_stateid(argp, &lock->lk_old_lock_stateid);
691 if (status)
692 return status;
693 READ_BUF(4);
J. Bruce Fields06553992014-06-02 12:32:51 -0400694 lock->lk_old_lock_seqid = be32_to_cpup(p++);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700695 }
696
697 DECODE_TAIL;
698}
699
Al Virob37ad282006-10-19 23:28:59 -0700700static __be32
Linus Torvalds1da177e2005-04-16 15:20:36 -0700701nfsd4_decode_lockt(struct nfsd4_compoundargs *argp, struct nfsd4_lockt *lockt)
702{
703 DECODE_HEAD;
704
705 READ_BUF(32);
J. Bruce Fields06553992014-06-02 12:32:51 -0400706 lockt->lt_type = be32_to_cpup(p++);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700707 if((lockt->lt_type < NFS4_READ_LT) || (lockt->lt_type > NFS4_WRITEW_LT))
708 goto xdr_error;
J. Bruce Fields542d1ab2014-06-02 12:45:31 -0400709 p = xdr_decode_hyper(p, &lockt->lt_offset);
710 p = xdr_decode_hyper(p, &lockt->lt_length);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700711 COPYMEM(&lockt->lt_clientid, 8);
J. Bruce Fields06553992014-06-02 12:32:51 -0400712 lockt->lt_owner.len = be32_to_cpup(p++);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700713 READ_BUF(lockt->lt_owner.len);
714 READMEM(lockt->lt_owner.data, lockt->lt_owner.len);
715
716 DECODE_TAIL;
717}
718
Al Virob37ad282006-10-19 23:28:59 -0700719static __be32
Linus Torvalds1da177e2005-04-16 15:20:36 -0700720nfsd4_decode_locku(struct nfsd4_compoundargs *argp, struct nfsd4_locku *locku)
721{
722 DECODE_HEAD;
723
Benny Halevye31a1b62008-08-12 20:46:18 +0300724 READ_BUF(8);
J. Bruce Fields06553992014-06-02 12:32:51 -0400725 locku->lu_type = be32_to_cpup(p++);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700726 if ((locku->lu_type < NFS4_READ_LT) || (locku->lu_type > NFS4_WRITEW_LT))
727 goto xdr_error;
J. Bruce Fields06553992014-06-02 12:32:51 -0400728 locku->lu_seqid = be32_to_cpup(p++);
Benny Halevye31a1b62008-08-12 20:46:18 +0300729 status = nfsd4_decode_stateid(argp, &locku->lu_stateid);
730 if (status)
731 return status;
732 READ_BUF(16);
J. Bruce Fields542d1ab2014-06-02 12:45:31 -0400733 p = xdr_decode_hyper(p, &locku->lu_offset);
734 p = xdr_decode_hyper(p, &locku->lu_length);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700735
736 DECODE_TAIL;
737}
738
Al Virob37ad282006-10-19 23:28:59 -0700739static __be32
Linus Torvalds1da177e2005-04-16 15:20:36 -0700740nfsd4_decode_lookup(struct nfsd4_compoundargs *argp, struct nfsd4_lookup *lookup)
741{
742 DECODE_HEAD;
743
744 READ_BUF(4);
J. Bruce Fields06553992014-06-02 12:32:51 -0400745 lookup->lo_len = be32_to_cpup(p++);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700746 READ_BUF(lookup->lo_len);
747 SAVEMEM(lookup->lo_name, lookup->lo_len);
J. Bruce Fieldsa36b1722012-11-25 16:31:00 -0500748 if ((status = check_filename(lookup->lo_name, lookup->lo_len)))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700749 return status;
750
751 DECODE_TAIL;
752}
753
Benny Halevy2c8bd7e2012-02-16 20:57:09 +0200754static __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 -0400755{
756 __be32 *p;
757 u32 w;
758
759 READ_BUF(4);
J. Bruce Fields06553992014-06-02 12:32:51 -0400760 w = be32_to_cpup(p++);
Benny Halevy2c8bd7e2012-02-16 20:57:09 +0200761 *share_access = w & NFS4_SHARE_ACCESS_MASK;
762 *deleg_want = w & NFS4_SHARE_WANT_MASK;
763 if (deleg_when)
764 *deleg_when = w & NFS4_SHARE_WHEN_MASK;
765
J. Bruce Fields04f9e662011-10-10 14:37:13 -0400766 switch (w & NFS4_SHARE_ACCESS_MASK) {
767 case NFS4_SHARE_ACCESS_READ:
768 case NFS4_SHARE_ACCESS_WRITE:
769 case NFS4_SHARE_ACCESS_BOTH:
770 break;
771 default:
772 return nfserr_bad_xdr;
773 }
Benny Halevyfc0d14f2011-10-27 20:43:01 +0200774 w &= ~NFS4_SHARE_ACCESS_MASK;
J. Bruce Fields04f9e662011-10-10 14:37:13 -0400775 if (!w)
776 return nfs_ok;
777 if (!argp->minorversion)
778 return nfserr_bad_xdr;
779 switch (w & NFS4_SHARE_WANT_MASK) {
780 case NFS4_SHARE_WANT_NO_PREFERENCE:
781 case NFS4_SHARE_WANT_READ_DELEG:
782 case NFS4_SHARE_WANT_WRITE_DELEG:
783 case NFS4_SHARE_WANT_ANY_DELEG:
784 case NFS4_SHARE_WANT_NO_DELEG:
785 case NFS4_SHARE_WANT_CANCEL:
786 break;
787 default:
788 return nfserr_bad_xdr;
789 }
Benny Halevy92bac8c2011-10-19 19:13:29 -0700790 w &= ~NFS4_SHARE_WANT_MASK;
J. Bruce Fields04f9e662011-10-10 14:37:13 -0400791 if (!w)
792 return nfs_ok;
Benny Halevy2c8bd7e2012-02-16 20:57:09 +0200793
794 if (!deleg_when) /* open_downgrade */
795 return nfserr_inval;
J. Bruce Fields04f9e662011-10-10 14:37:13 -0400796 switch (w) {
797 case NFS4_SHARE_SIGNAL_DELEG_WHEN_RESRC_AVAIL:
798 case NFS4_SHARE_PUSH_DELEG_WHEN_UNCONTENDED:
Benny Halevyc668fc62011-10-19 19:13:13 -0700799 case (NFS4_SHARE_SIGNAL_DELEG_WHEN_RESRC_AVAIL |
800 NFS4_SHARE_PUSH_DELEG_WHEN_UNCONTENDED):
J. Bruce Fields04f9e662011-10-10 14:37:13 -0400801 return nfs_ok;
802 }
803xdr_error:
804 return nfserr_bad_xdr;
805}
806
807static __be32 nfsd4_decode_share_deny(struct nfsd4_compoundargs *argp, u32 *x)
808{
809 __be32 *p;
810
811 READ_BUF(4);
J. Bruce Fields06553992014-06-02 12:32:51 -0400812 *x = be32_to_cpup(p++);
J. Bruce Fields04f9e662011-10-10 14:37:13 -0400813 /* Note: unlinke access bits, deny bits may be zero. */
Dan Carpenter01cd4af2011-10-17 10:41:17 +0300814 if (*x & ~NFS4_SHARE_DENY_BOTH)
J. Bruce Fields04f9e662011-10-10 14:37:13 -0400815 return nfserr_bad_xdr;
816 return nfs_ok;
817xdr_error:
818 return nfserr_bad_xdr;
819}
820
J. Bruce Fieldsa084daf2011-10-10 15:07:40 -0400821static __be32 nfsd4_decode_opaque(struct nfsd4_compoundargs *argp, struct xdr_netobj *o)
822{
823 __be32 *p;
824
825 READ_BUF(4);
J. Bruce Fields06553992014-06-02 12:32:51 -0400826 o->len = be32_to_cpup(p++);
J. Bruce Fieldsa084daf2011-10-10 15:07:40 -0400827
828 if (o->len == 0 || o->len > NFS4_OPAQUE_LIMIT)
829 return nfserr_bad_xdr;
830
831 READ_BUF(o->len);
832 SAVEMEM(o->data, o->len);
833 return nfs_ok;
834xdr_error:
835 return nfserr_bad_xdr;
836}
837
Al Virob37ad282006-10-19 23:28:59 -0700838static __be32
Linus Torvalds1da177e2005-04-16 15:20:36 -0700839nfsd4_decode_open(struct nfsd4_compoundargs *argp, struct nfsd4_open *open)
840{
841 DECODE_HEAD;
Benny Halevy2c8bd7e2012-02-16 20:57:09 +0200842 u32 dummy;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700843
844 memset(open->op_bmval, 0, sizeof(open->op_bmval));
845 open->op_iattr.ia_valid = 0;
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -0400846 open->op_openowner = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700847
J. Bruce Fields9d313b12013-02-28 12:51:49 -0800848 open->op_xdr_error = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700849 /* seqid, share_access, share_deny, clientid, ownerlen */
J. Bruce Fields04f9e662011-10-10 14:37:13 -0400850 READ_BUF(4);
J. Bruce Fields06553992014-06-02 12:32:51 -0400851 open->op_seqid = be32_to_cpup(p++);
Benny Halevy2c8bd7e2012-02-16 20:57:09 +0200852 /* decode, yet ignore deleg_when until supported */
853 status = nfsd4_decode_share_access(argp, &open->op_share_access,
854 &open->op_deleg_want, &dummy);
J. Bruce Fields04f9e662011-10-10 14:37:13 -0400855 if (status)
856 goto xdr_error;
857 status = nfsd4_decode_share_deny(argp, &open->op_share_deny);
858 if (status)
859 goto xdr_error;
J. Bruce Fieldsa084daf2011-10-10 15:07:40 -0400860 READ_BUF(sizeof(clientid_t));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700861 COPYMEM(&open->op_clientid, sizeof(clientid_t));
J. Bruce Fieldsa084daf2011-10-10 15:07:40 -0400862 status = nfsd4_decode_opaque(argp, &open->op_owner);
863 if (status)
864 goto xdr_error;
865 READ_BUF(4);
J. Bruce Fields06553992014-06-02 12:32:51 -0400866 open->op_create = be32_to_cpup(p++);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700867 switch (open->op_create) {
868 case NFS4_OPEN_NOCREATE:
869 break;
870 case NFS4_OPEN_CREATE:
871 READ_BUF(4);
J. Bruce Fields06553992014-06-02 12:32:51 -0400872 open->op_createmode = be32_to_cpup(p++);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700873 switch (open->op_createmode) {
874 case NFS4_CREATE_UNCHECKED:
875 case NFS4_CREATE_GUARDED:
Benny Halevyc0d6fc82009-04-03 08:29:05 +0300876 status = nfsd4_decode_fattr(argp, open->op_bmval,
David Quigley18032ca2013-05-02 13:19:10 -0400877 &open->op_iattr, &open->op_acl, &open->op_label);
Benny Halevyc0d6fc82009-04-03 08:29:05 +0300878 if (status)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700879 goto out;
880 break;
881 case NFS4_CREATE_EXCLUSIVE:
Chuck Leverab4684d2012-03-02 17:13:50 -0500882 READ_BUF(NFS4_VERIFIER_SIZE);
883 COPYMEM(open->op_verf.data, NFS4_VERIFIER_SIZE);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700884 break;
Benny Halevy79fb54a2009-04-03 08:29:17 +0300885 case NFS4_CREATE_EXCLUSIVE4_1:
886 if (argp->minorversion < 1)
887 goto xdr_error;
Chuck Leverab4684d2012-03-02 17:13:50 -0500888 READ_BUF(NFS4_VERIFIER_SIZE);
889 COPYMEM(open->op_verf.data, NFS4_VERIFIER_SIZE);
Benny Halevy79fb54a2009-04-03 08:29:17 +0300890 status = nfsd4_decode_fattr(argp, open->op_bmval,
David Quigley18032ca2013-05-02 13:19:10 -0400891 &open->op_iattr, &open->op_acl, &open->op_label);
Benny Halevy79fb54a2009-04-03 08:29:17 +0300892 if (status)
893 goto out;
894 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700895 default:
896 goto xdr_error;
897 }
898 break;
899 default:
900 goto xdr_error;
901 }
902
903 /* open_claim */
904 READ_BUF(4);
J. Bruce Fields06553992014-06-02 12:32:51 -0400905 open->op_claim_type = be32_to_cpup(p++);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700906 switch (open->op_claim_type) {
907 case NFS4_OPEN_CLAIM_NULL:
908 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
909 READ_BUF(4);
J. Bruce Fields06553992014-06-02 12:32:51 -0400910 open->op_fname.len = be32_to_cpup(p++);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700911 READ_BUF(open->op_fname.len);
912 SAVEMEM(open->op_fname.data, open->op_fname.len);
J. Bruce Fieldsa36b1722012-11-25 16:31:00 -0500913 if ((status = check_filename(open->op_fname.data, open->op_fname.len)))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700914 return status;
915 break;
916 case NFS4_OPEN_CLAIM_PREVIOUS:
917 READ_BUF(4);
J. Bruce Fields06553992014-06-02 12:32:51 -0400918 open->op_delegate_type = be32_to_cpup(p++);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700919 break;
920 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
Benny Halevye31a1b62008-08-12 20:46:18 +0300921 status = nfsd4_decode_stateid(argp, &open->op_delegate_stateid);
922 if (status)
923 return status;
924 READ_BUF(4);
J. Bruce Fields06553992014-06-02 12:32:51 -0400925 open->op_fname.len = be32_to_cpup(p++);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700926 READ_BUF(open->op_fname.len);
927 SAVEMEM(open->op_fname.data, open->op_fname.len);
J. Bruce Fieldsa36b1722012-11-25 16:31:00 -0500928 if ((status = check_filename(open->op_fname.data, open->op_fname.len)))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700929 return status;
930 break;
J. Bruce Fields8b289b22011-10-19 11:52:12 -0400931 case NFS4_OPEN_CLAIM_FH:
932 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
933 if (argp->minorversion < 1)
934 goto xdr_error;
935 /* void */
936 break;
937 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
938 if (argp->minorversion < 1)
939 goto xdr_error;
940 status = nfsd4_decode_stateid(argp, &open->op_delegate_stateid);
941 if (status)
942 return status;
943 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700944 default:
945 goto xdr_error;
946 }
947
948 DECODE_TAIL;
949}
950
Al Virob37ad282006-10-19 23:28:59 -0700951static __be32
Linus Torvalds1da177e2005-04-16 15:20:36 -0700952nfsd4_decode_open_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_open_confirm *open_conf)
953{
954 DECODE_HEAD;
Anna Schumakere1a90eb2013-10-30 10:00:20 -0400955
956 if (argp->minorversion >= 1)
957 return nfserr_notsupp;
958
Benny Halevye31a1b62008-08-12 20:46:18 +0300959 status = nfsd4_decode_stateid(argp, &open_conf->oc_req_stateid);
960 if (status)
961 return status;
962 READ_BUF(4);
J. Bruce Fields06553992014-06-02 12:32:51 -0400963 open_conf->oc_seqid = be32_to_cpup(p++);
Anna Schumakere1a90eb2013-10-30 10:00:20 -0400964
Linus Torvalds1da177e2005-04-16 15:20:36 -0700965 DECODE_TAIL;
966}
967
Al Virob37ad282006-10-19 23:28:59 -0700968static __be32
Linus Torvalds1da177e2005-04-16 15:20:36 -0700969nfsd4_decode_open_downgrade(struct nfsd4_compoundargs *argp, struct nfsd4_open_downgrade *open_down)
970{
971 DECODE_HEAD;
972
Benny Halevye31a1b62008-08-12 20:46:18 +0300973 status = nfsd4_decode_stateid(argp, &open_down->od_stateid);
974 if (status)
975 return status;
J. Bruce Fields04f9e662011-10-10 14:37:13 -0400976 READ_BUF(4);
J. Bruce Fields06553992014-06-02 12:32:51 -0400977 open_down->od_seqid = be32_to_cpup(p++);
Benny Halevy2c8bd7e2012-02-16 20:57:09 +0200978 status = nfsd4_decode_share_access(argp, &open_down->od_share_access,
979 &open_down->od_deleg_want, NULL);
J. Bruce Fields04f9e662011-10-10 14:37:13 -0400980 if (status)
981 return status;
982 status = nfsd4_decode_share_deny(argp, &open_down->od_share_deny);
983 if (status)
984 return status;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700985 DECODE_TAIL;
986}
987
Al Virob37ad282006-10-19 23:28:59 -0700988static __be32
Linus Torvalds1da177e2005-04-16 15:20:36 -0700989nfsd4_decode_putfh(struct nfsd4_compoundargs *argp, struct nfsd4_putfh *putfh)
990{
991 DECODE_HEAD;
992
993 READ_BUF(4);
J. Bruce Fields06553992014-06-02 12:32:51 -0400994 putfh->pf_fhlen = be32_to_cpup(p++);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700995 if (putfh->pf_fhlen > NFS4_FHSIZE)
996 goto xdr_error;
997 READ_BUF(putfh->pf_fhlen);
998 SAVEMEM(putfh->pf_fhval, putfh->pf_fhlen);
999
1000 DECODE_TAIL;
1001}
1002
Al Virob37ad282006-10-19 23:28:59 -07001003static __be32
Anna Schumakere1a90eb2013-10-30 10:00:20 -04001004nfsd4_decode_putpubfh(struct nfsd4_compoundargs *argp, void *p)
1005{
1006 if (argp->minorversion == 0)
1007 return nfs_ok;
1008 return nfserr_notsupp;
1009}
1010
1011static __be32
Linus Torvalds1da177e2005-04-16 15:20:36 -07001012nfsd4_decode_read(struct nfsd4_compoundargs *argp, struct nfsd4_read *read)
1013{
1014 DECODE_HEAD;
1015
Benny Halevye31a1b62008-08-12 20:46:18 +03001016 status = nfsd4_decode_stateid(argp, &read->rd_stateid);
1017 if (status)
1018 return status;
1019 READ_BUF(12);
J. Bruce Fields542d1ab2014-06-02 12:45:31 -04001020 p = xdr_decode_hyper(p, &read->rd_offset);
J. Bruce Fields06553992014-06-02 12:32:51 -04001021 read->rd_length = be32_to_cpup(p++);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001022
1023 DECODE_TAIL;
1024}
1025
Al Virob37ad282006-10-19 23:28:59 -07001026static __be32
Linus Torvalds1da177e2005-04-16 15:20:36 -07001027nfsd4_decode_readdir(struct nfsd4_compoundargs *argp, struct nfsd4_readdir *readdir)
1028{
1029 DECODE_HEAD;
1030
1031 READ_BUF(24);
J. Bruce Fields542d1ab2014-06-02 12:45:31 -04001032 p = xdr_decode_hyper(p, &readdir->rd_cookie);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001033 COPYMEM(readdir->rd_verf.data, sizeof(readdir->rd_verf.data));
J. Bruce Fields06553992014-06-02 12:32:51 -04001034 readdir->rd_dircount = be32_to_cpup(p++);
1035 readdir->rd_maxcount = be32_to_cpup(p++);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001036 if ((status = nfsd4_decode_bitmap(argp, readdir->rd_bmval)))
1037 goto out;
1038
1039 DECODE_TAIL;
1040}
1041
Al Virob37ad282006-10-19 23:28:59 -07001042static __be32
Linus Torvalds1da177e2005-04-16 15:20:36 -07001043nfsd4_decode_remove(struct nfsd4_compoundargs *argp, struct nfsd4_remove *remove)
1044{
1045 DECODE_HEAD;
1046
1047 READ_BUF(4);
J. Bruce Fields06553992014-06-02 12:32:51 -04001048 remove->rm_namelen = be32_to_cpup(p++);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001049 READ_BUF(remove->rm_namelen);
1050 SAVEMEM(remove->rm_name, remove->rm_namelen);
J. Bruce Fieldsa36b1722012-11-25 16:31:00 -05001051 if ((status = check_filename(remove->rm_name, remove->rm_namelen)))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001052 return status;
1053
1054 DECODE_TAIL;
1055}
1056
Al Virob37ad282006-10-19 23:28:59 -07001057static __be32
Linus Torvalds1da177e2005-04-16 15:20:36 -07001058nfsd4_decode_rename(struct nfsd4_compoundargs *argp, struct nfsd4_rename *rename)
1059{
1060 DECODE_HEAD;
1061
1062 READ_BUF(4);
J. Bruce Fields06553992014-06-02 12:32:51 -04001063 rename->rn_snamelen = be32_to_cpup(p++);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001064 READ_BUF(rename->rn_snamelen + 4);
1065 SAVEMEM(rename->rn_sname, rename->rn_snamelen);
J. Bruce Fields06553992014-06-02 12:32:51 -04001066 rename->rn_tnamelen = be32_to_cpup(p++);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001067 READ_BUF(rename->rn_tnamelen);
1068 SAVEMEM(rename->rn_tname, rename->rn_tnamelen);
J. Bruce Fieldsa36b1722012-11-25 16:31:00 -05001069 if ((status = check_filename(rename->rn_sname, rename->rn_snamelen)))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001070 return status;
J. Bruce Fieldsa36b1722012-11-25 16:31:00 -05001071 if ((status = check_filename(rename->rn_tname, rename->rn_tnamelen)))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001072 return status;
1073
1074 DECODE_TAIL;
1075}
1076
Al Virob37ad282006-10-19 23:28:59 -07001077static __be32
Linus Torvalds1da177e2005-04-16 15:20:36 -07001078nfsd4_decode_renew(struct nfsd4_compoundargs *argp, clientid_t *clientid)
1079{
1080 DECODE_HEAD;
1081
Anna Schumakere1a90eb2013-10-30 10:00:20 -04001082 if (argp->minorversion >= 1)
1083 return nfserr_notsupp;
1084
Linus Torvalds1da177e2005-04-16 15:20:36 -07001085 READ_BUF(sizeof(clientid_t));
1086 COPYMEM(clientid, sizeof(clientid_t));
1087
1088 DECODE_TAIL;
1089}
1090
Al Virob37ad282006-10-19 23:28:59 -07001091static __be32
Andy Adamsondcb488a32007-07-17 04:04:51 -07001092nfsd4_decode_secinfo(struct nfsd4_compoundargs *argp,
1093 struct nfsd4_secinfo *secinfo)
1094{
1095 DECODE_HEAD;
1096
1097 READ_BUF(4);
J. Bruce Fields06553992014-06-02 12:32:51 -04001098 secinfo->si_namelen = be32_to_cpup(p++);
Andy Adamsondcb488a32007-07-17 04:04:51 -07001099 READ_BUF(secinfo->si_namelen);
1100 SAVEMEM(secinfo->si_name, secinfo->si_namelen);
J. Bruce Fieldsa36b1722012-11-25 16:31:00 -05001101 status = check_filename(secinfo->si_name, secinfo->si_namelen);
Andy Adamsondcb488a32007-07-17 04:04:51 -07001102 if (status)
1103 return status;
1104 DECODE_TAIL;
1105}
1106
1107static __be32
J. Bruce Fields04f4ad12010-12-16 09:51:13 -05001108nfsd4_decode_secinfo_no_name(struct nfsd4_compoundargs *argp,
1109 struct nfsd4_secinfo_no_name *sin)
1110{
1111 DECODE_HEAD;
1112
1113 READ_BUF(4);
J. Bruce Fields06553992014-06-02 12:32:51 -04001114 sin->sin_style = be32_to_cpup(p++);
J. Bruce Fields04f4ad12010-12-16 09:51:13 -05001115 DECODE_TAIL;
1116}
1117
1118static __be32
Linus Torvalds1da177e2005-04-16 15:20:36 -07001119nfsd4_decode_setattr(struct nfsd4_compoundargs *argp, struct nfsd4_setattr *setattr)
1120{
Benny Halevye31a1b62008-08-12 20:46:18 +03001121 __be32 status;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001122
Benny Halevye31a1b62008-08-12 20:46:18 +03001123 status = nfsd4_decode_stateid(argp, &setattr->sa_stateid);
1124 if (status)
1125 return status;
Yu Zhiguo3c8e0312009-05-16 16:22:31 +08001126 return nfsd4_decode_fattr(argp, setattr->sa_bmval, &setattr->sa_iattr,
David Quigley18032ca2013-05-02 13:19:10 -04001127 &setattr->sa_acl, &setattr->sa_label);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001128}
1129
Al Virob37ad282006-10-19 23:28:59 -07001130static __be32
Linus Torvalds1da177e2005-04-16 15:20:36 -07001131nfsd4_decode_setclientid(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid *setclientid)
1132{
1133 DECODE_HEAD;
1134
Anna Schumakere1a90eb2013-10-30 10:00:20 -04001135 if (argp->minorversion >= 1)
1136 return nfserr_notsupp;
1137
Chuck Leverab4684d2012-03-02 17:13:50 -05001138 READ_BUF(NFS4_VERIFIER_SIZE);
1139 COPYMEM(setclientid->se_verf.data, NFS4_VERIFIER_SIZE);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001140
J. Bruce Fieldsa084daf2011-10-10 15:07:40 -04001141 status = nfsd4_decode_opaque(argp, &setclientid->se_name);
1142 if (status)
1143 return nfserr_bad_xdr;
1144 READ_BUF(8);
J. Bruce Fields06553992014-06-02 12:32:51 -04001145 setclientid->se_callback_prog = be32_to_cpup(p++);
1146 setclientid->se_callback_netid_len = be32_to_cpup(p++);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001147
1148 READ_BUF(setclientid->se_callback_netid_len + 4);
1149 SAVEMEM(setclientid->se_callback_netid_val, setclientid->se_callback_netid_len);
J. Bruce Fields06553992014-06-02 12:32:51 -04001150 setclientid->se_callback_addr_len = be32_to_cpup(p++);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001151
1152 READ_BUF(setclientid->se_callback_addr_len + 4);
1153 SAVEMEM(setclientid->se_callback_addr_val, setclientid->se_callback_addr_len);
J. Bruce Fields06553992014-06-02 12:32:51 -04001154 setclientid->se_callback_ident = be32_to_cpup(p++);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001155
1156 DECODE_TAIL;
1157}
1158
Al Virob37ad282006-10-19 23:28:59 -07001159static __be32
Linus Torvalds1da177e2005-04-16 15:20:36 -07001160nfsd4_decode_setclientid_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid_confirm *scd_c)
1161{
1162 DECODE_HEAD;
1163
Anna Schumakere1a90eb2013-10-30 10:00:20 -04001164 if (argp->minorversion >= 1)
1165 return nfserr_notsupp;
1166
Chuck Leverab4684d2012-03-02 17:13:50 -05001167 READ_BUF(8 + NFS4_VERIFIER_SIZE);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001168 COPYMEM(&scd_c->sc_clientid, 8);
Chuck Leverab4684d2012-03-02 17:13:50 -05001169 COPYMEM(&scd_c->sc_confirm, NFS4_VERIFIER_SIZE);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001170
1171 DECODE_TAIL;
1172}
1173
1174/* Also used for NVERIFY */
Al Virob37ad282006-10-19 23:28:59 -07001175static __be32
Linus Torvalds1da177e2005-04-16 15:20:36 -07001176nfsd4_decode_verify(struct nfsd4_compoundargs *argp, struct nfsd4_verify *verify)
1177{
Linus Torvalds1da177e2005-04-16 15:20:36 -07001178 DECODE_HEAD;
1179
1180 if ((status = nfsd4_decode_bitmap(argp, verify->ve_bmval)))
1181 goto out;
1182
1183 /* For convenience's sake, we compare raw xdr'd attributes in
J. Bruce Fieldse5f95702012-11-30 17:24:18 -05001184 * nfsd4_proc_verify */
1185
Linus Torvalds1da177e2005-04-16 15:20:36 -07001186 READ_BUF(4);
J. Bruce Fields06553992014-06-02 12:32:51 -04001187 verify->ve_attrlen = be32_to_cpup(p++);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001188 READ_BUF(verify->ve_attrlen);
1189 SAVEMEM(verify->ve_attrval, verify->ve_attrlen);
1190
1191 DECODE_TAIL;
1192}
1193
Al Virob37ad282006-10-19 23:28:59 -07001194static __be32
Linus Torvalds1da177e2005-04-16 15:20:36 -07001195nfsd4_decode_write(struct nfsd4_compoundargs *argp, struct nfsd4_write *write)
1196{
1197 int avail;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001198 int len;
1199 DECODE_HEAD;
1200
Benny Halevye31a1b62008-08-12 20:46:18 +03001201 status = nfsd4_decode_stateid(argp, &write->wr_stateid);
1202 if (status)
1203 return status;
1204 READ_BUF(16);
J. Bruce Fields542d1ab2014-06-02 12:45:31 -04001205 p = xdr_decode_hyper(p, &write->wr_offset);
J. Bruce Fields06553992014-06-02 12:32:51 -04001206 write->wr_stable_how = be32_to_cpup(p++);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001207 if (write->wr_stable_how > 2)
1208 goto xdr_error;
J. Bruce Fields06553992014-06-02 12:32:51 -04001209 write->wr_buflen = be32_to_cpup(p++);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001210
1211 /* Sorry .. no magic macros for this.. *
1212 * READ_BUF(write->wr_buflen);
1213 * SAVEMEM(write->wr_buf, write->wr_buflen);
1214 */
1215 avail = (char*)argp->end - (char*)argp->p;
1216 if (avail + argp->pagelen < write->wr_buflen) {
Chuck Lever817cb9d2007-09-11 18:01:20 -04001217 dprintk("NFSD: xdr error (%s:%d)\n",
1218 __FILE__, __LINE__);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001219 goto xdr_error;
1220 }
J. Bruce Fields70cc7f72012-11-16 14:16:46 -05001221 write->wr_head.iov_base = p;
1222 write->wr_head.iov_len = avail;
J. Bruce Fields70cc7f72012-11-16 14:16:46 -05001223 write->wr_pagelist = argp->pagelist;
J. Bruce Fields5a80a542012-11-16 10:01:30 -05001224
1225 len = XDR_QUADLEN(write->wr_buflen) << 2;
1226 if (len >= avail) {
1227 int pages;
1228
1229 len -= avail;
1230
1231 pages = len >> PAGE_SHIFT;
1232 argp->pagelist += pages;
1233 argp->pagelen -= pages * PAGE_SIZE;
1234 len -= pages * PAGE_SIZE;
1235
1236 argp->p = (__be32 *)page_address(argp->pagelist[0]);
J. Bruce Fields365da4a2013-11-19 17:32:43 -05001237 argp->pagelist++;
J. Bruce Fields5a80a542012-11-16 10:01:30 -05001238 argp->end = argp->p + XDR_QUADLEN(PAGE_SIZE);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001239 }
J. Bruce Fields5a80a542012-11-16 10:01:30 -05001240 argp->p += XDR_QUADLEN(len);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001241
1242 DECODE_TAIL;
1243}
1244
Al Virob37ad282006-10-19 23:28:59 -07001245static __be32
Linus Torvalds1da177e2005-04-16 15:20:36 -07001246nfsd4_decode_release_lockowner(struct nfsd4_compoundargs *argp, struct nfsd4_release_lockowner *rlockowner)
1247{
1248 DECODE_HEAD;
1249
Anna Schumakere1a90eb2013-10-30 10:00:20 -04001250 if (argp->minorversion >= 1)
1251 return nfserr_notsupp;
1252
Linus Torvalds1da177e2005-04-16 15:20:36 -07001253 READ_BUF(12);
1254 COPYMEM(&rlockowner->rl_clientid, sizeof(clientid_t));
J. Bruce Fields06553992014-06-02 12:32:51 -04001255 rlockowner->rl_owner.len = be32_to_cpup(p++);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001256 READ_BUF(rlockowner->rl_owner.len);
1257 READMEM(rlockowner->rl_owner.data, rlockowner->rl_owner.len);
1258
Andy Adamson60adfc52009-04-03 08:28:50 +03001259 if (argp->minorversion && !zero_clientid(&rlockowner->rl_clientid))
1260 return nfserr_inval;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001261 DECODE_TAIL;
1262}
1263
Al Virob37ad282006-10-19 23:28:59 -07001264static __be32
Andy Adamson2db134e2009-04-03 08:27:55 +03001265nfsd4_decode_exchange_id(struct nfsd4_compoundargs *argp,
Andy Adamson0733d212009-04-03 08:28:01 +03001266 struct nfsd4_exchange_id *exid)
Andy Adamson2db134e2009-04-03 08:27:55 +03001267{
Mi Jinlong5afa0402010-11-09 09:39:23 +08001268 int dummy, tmp;
Andy Adamson0733d212009-04-03 08:28:01 +03001269 DECODE_HEAD;
1270
1271 READ_BUF(NFS4_VERIFIER_SIZE);
1272 COPYMEM(exid->verifier.data, NFS4_VERIFIER_SIZE);
1273
J. Bruce Fieldsa084daf2011-10-10 15:07:40 -04001274 status = nfsd4_decode_opaque(argp, &exid->clname);
1275 if (status)
1276 return nfserr_bad_xdr;
Andy Adamson0733d212009-04-03 08:28:01 +03001277
1278 READ_BUF(4);
J. Bruce Fields06553992014-06-02 12:32:51 -04001279 exid->flags = be32_to_cpup(p++);
Andy Adamson0733d212009-04-03 08:28:01 +03001280
1281 /* Ignore state_protect4_a */
1282 READ_BUF(4);
J. Bruce Fields06553992014-06-02 12:32:51 -04001283 exid->spa_how = be32_to_cpup(p++);
Andy Adamson0733d212009-04-03 08:28:01 +03001284 switch (exid->spa_how) {
1285 case SP4_NONE:
1286 break;
1287 case SP4_MACH_CRED:
1288 /* spo_must_enforce */
1289 READ_BUF(4);
J. Bruce Fields06553992014-06-02 12:32:51 -04001290 dummy = be32_to_cpup(p++);
Andy Adamson0733d212009-04-03 08:28:01 +03001291 READ_BUF(dummy * 4);
1292 p += dummy;
1293
1294 /* spo_must_allow */
1295 READ_BUF(4);
J. Bruce Fields06553992014-06-02 12:32:51 -04001296 dummy = be32_to_cpup(p++);
Andy Adamson0733d212009-04-03 08:28:01 +03001297 READ_BUF(dummy * 4);
1298 p += dummy;
1299 break;
1300 case SP4_SSV:
1301 /* ssp_ops */
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 READ_BUF(4);
J. Bruce Fields06553992014-06-02 12:32:51 -04001308 dummy = be32_to_cpup(p++);
Andy Adamson0733d212009-04-03 08:28:01 +03001309 READ_BUF(dummy * 4);
1310 p += dummy;
1311
1312 /* ssp_hash_algs<> */
1313 READ_BUF(4);
J. Bruce Fields06553992014-06-02 12:32:51 -04001314 tmp = be32_to_cpup(p++);
Mi Jinlong5afa0402010-11-09 09:39:23 +08001315 while (tmp--) {
1316 READ_BUF(4);
J. Bruce Fields06553992014-06-02 12:32:51 -04001317 dummy = be32_to_cpup(p++);
Mi Jinlong5afa0402010-11-09 09:39:23 +08001318 READ_BUF(dummy);
1319 p += XDR_QUADLEN(dummy);
1320 }
Andy Adamson0733d212009-04-03 08:28:01 +03001321
1322 /* ssp_encr_algs<> */
1323 READ_BUF(4);
J. Bruce Fields06553992014-06-02 12:32:51 -04001324 tmp = be32_to_cpup(p++);
Mi Jinlong5afa0402010-11-09 09:39:23 +08001325 while (tmp--) {
1326 READ_BUF(4);
J. Bruce Fields06553992014-06-02 12:32:51 -04001327 dummy = be32_to_cpup(p++);
Mi Jinlong5afa0402010-11-09 09:39:23 +08001328 READ_BUF(dummy);
1329 p += XDR_QUADLEN(dummy);
1330 }
Andy Adamson0733d212009-04-03 08:28:01 +03001331
1332 /* ssp_window and ssp_num_gss_handles */
1333 READ_BUF(8);
J. Bruce Fields06553992014-06-02 12:32:51 -04001334 dummy = be32_to_cpup(p++);
1335 dummy = be32_to_cpup(p++);
Andy Adamson0733d212009-04-03 08:28:01 +03001336 break;
1337 default:
1338 goto xdr_error;
1339 }
1340
1341 /* Ignore Implementation ID */
1342 READ_BUF(4); /* nfs_impl_id4 array length */
J. Bruce Fields06553992014-06-02 12:32:51 -04001343 dummy = be32_to_cpup(p++);
Andy Adamson0733d212009-04-03 08:28:01 +03001344
1345 if (dummy > 1)
1346 goto xdr_error;
1347
1348 if (dummy == 1) {
1349 /* nii_domain */
1350 READ_BUF(4);
J. Bruce Fields06553992014-06-02 12:32:51 -04001351 dummy = be32_to_cpup(p++);
Andy Adamson0733d212009-04-03 08:28:01 +03001352 READ_BUF(dummy);
1353 p += XDR_QUADLEN(dummy);
1354
1355 /* nii_name */
1356 READ_BUF(4);
J. Bruce Fields06553992014-06-02 12:32:51 -04001357 dummy = be32_to_cpup(p++);
Andy Adamson0733d212009-04-03 08:28:01 +03001358 READ_BUF(dummy);
1359 p += XDR_QUADLEN(dummy);
1360
1361 /* nii_date */
1362 READ_BUF(12);
1363 p += 3;
1364 }
1365 DECODE_TAIL;
Andy Adamson2db134e2009-04-03 08:27:55 +03001366}
1367
1368static __be32
1369nfsd4_decode_create_session(struct nfsd4_compoundargs *argp,
1370 struct nfsd4_create_session *sess)
1371{
Andy Adamsonec6b5d72009-04-03 08:28:28 +03001372 DECODE_HEAD;
Andy Adamsonec6b5d72009-04-03 08:28:28 +03001373 u32 dummy;
Andy Adamsonec6b5d72009-04-03 08:28:28 +03001374
1375 READ_BUF(16);
1376 COPYMEM(&sess->clientid, 8);
J. Bruce Fields06553992014-06-02 12:32:51 -04001377 sess->seqid = be32_to_cpup(p++);
1378 sess->flags = be32_to_cpup(p++);
Andy Adamsonec6b5d72009-04-03 08:28:28 +03001379
1380 /* Fore channel attrs */
1381 READ_BUF(28);
J. Bruce Fields06553992014-06-02 12:32:51 -04001382 dummy = be32_to_cpup(p++); /* headerpadsz is always 0 */
1383 sess->fore_channel.maxreq_sz = be32_to_cpup(p++);
1384 sess->fore_channel.maxresp_sz = be32_to_cpup(p++);
1385 sess->fore_channel.maxresp_cached = be32_to_cpup(p++);
1386 sess->fore_channel.maxops = be32_to_cpup(p++);
1387 sess->fore_channel.maxreqs = be32_to_cpup(p++);
1388 sess->fore_channel.nr_rdma_attrs = be32_to_cpup(p++);
Andy Adamsonec6b5d72009-04-03 08:28:28 +03001389 if (sess->fore_channel.nr_rdma_attrs == 1) {
1390 READ_BUF(4);
J. Bruce Fields06553992014-06-02 12:32:51 -04001391 sess->fore_channel.rdma_attrs = be32_to_cpup(p++);
Andy Adamsonec6b5d72009-04-03 08:28:28 +03001392 } else if (sess->fore_channel.nr_rdma_attrs > 1) {
1393 dprintk("Too many fore channel attr bitmaps!\n");
1394 goto xdr_error;
1395 }
1396
1397 /* Back channel attrs */
1398 READ_BUF(28);
J. Bruce Fields06553992014-06-02 12:32:51 -04001399 dummy = be32_to_cpup(p++); /* headerpadsz is always 0 */
1400 sess->back_channel.maxreq_sz = be32_to_cpup(p++);
1401 sess->back_channel.maxresp_sz = be32_to_cpup(p++);
1402 sess->back_channel.maxresp_cached = be32_to_cpup(p++);
1403 sess->back_channel.maxops = be32_to_cpup(p++);
1404 sess->back_channel.maxreqs = be32_to_cpup(p++);
1405 sess->back_channel.nr_rdma_attrs = be32_to_cpup(p++);
Andy Adamsonec6b5d72009-04-03 08:28:28 +03001406 if (sess->back_channel.nr_rdma_attrs == 1) {
1407 READ_BUF(4);
J. Bruce Fields06553992014-06-02 12:32:51 -04001408 sess->back_channel.rdma_attrs = be32_to_cpup(p++);
Andy Adamsonec6b5d72009-04-03 08:28:28 +03001409 } else if (sess->back_channel.nr_rdma_attrs > 1) {
1410 dprintk("Too many back channel attr bitmaps!\n");
1411 goto xdr_error;
1412 }
1413
J. Bruce Fieldsacb28872012-03-27 14:50:26 -04001414 READ_BUF(4);
J. Bruce Fields06553992014-06-02 12:32:51 -04001415 sess->callback_prog = be32_to_cpup(p++);
J. Bruce Fieldsacb28872012-03-27 14:50:26 -04001416 nfsd4_decode_cb_sec(argp, &sess->cb_sec);
Andy Adamsonec6b5d72009-04-03 08:28:28 +03001417 DECODE_TAIL;
Andy Adamson2db134e2009-04-03 08:27:55 +03001418}
1419
1420static __be32
1421nfsd4_decode_destroy_session(struct nfsd4_compoundargs *argp,
1422 struct nfsd4_destroy_session *destroy_session)
1423{
Benny Halevye10e0cf2009-04-03 08:28:38 +03001424 DECODE_HEAD;
1425 READ_BUF(NFS4_MAX_SESSIONID_LEN);
1426 COPYMEM(destroy_session->sessionid.data, NFS4_MAX_SESSIONID_LEN);
1427
1428 DECODE_TAIL;
Andy Adamson2db134e2009-04-03 08:27:55 +03001429}
1430
1431static __be32
Bryan Schumakere1ca12d2011-07-13 11:04:21 -04001432nfsd4_decode_free_stateid(struct nfsd4_compoundargs *argp,
1433 struct nfsd4_free_stateid *free_stateid)
1434{
1435 DECODE_HEAD;
1436
1437 READ_BUF(sizeof(stateid_t));
J. Bruce Fields06553992014-06-02 12:32:51 -04001438 free_stateid->fr_stateid.si_generation = be32_to_cpup(p++);
Bryan Schumakere1ca12d2011-07-13 11:04:21 -04001439 COPYMEM(&free_stateid->fr_stateid.si_opaque, sizeof(stateid_opaque_t));
1440
1441 DECODE_TAIL;
1442}
1443
1444static __be32
Andy Adamson2db134e2009-04-03 08:27:55 +03001445nfsd4_decode_sequence(struct nfsd4_compoundargs *argp,
1446 struct nfsd4_sequence *seq)
1447{
Benny Halevyb85d4c02009-04-03 08:28:08 +03001448 DECODE_HEAD;
1449
1450 READ_BUF(NFS4_MAX_SESSIONID_LEN + 16);
1451 COPYMEM(seq->sessionid.data, NFS4_MAX_SESSIONID_LEN);
J. Bruce Fields06553992014-06-02 12:32:51 -04001452 seq->seqid = be32_to_cpup(p++);
1453 seq->slotid = be32_to_cpup(p++);
1454 seq->maxslots = be32_to_cpup(p++);
1455 seq->cachethis = be32_to_cpup(p++);
Benny Halevyb85d4c02009-04-03 08:28:08 +03001456
1457 DECODE_TAIL;
Andy Adamson2db134e2009-04-03 08:27:55 +03001458}
1459
Bryan Schumaker17456802011-07-13 10:50:48 -04001460static __be32
1461nfsd4_decode_test_stateid(struct nfsd4_compoundargs *argp, struct nfsd4_test_stateid *test_stateid)
1462{
Bryan Schumaker17456802011-07-13 10:50:48 -04001463 int i;
Bryan Schumaker03cfb422012-01-27 10:22:49 -05001464 __be32 *p, status;
1465 struct nfsd4_test_stateid_id *stateid;
Bryan Schumaker17456802011-07-13 10:50:48 -04001466
1467 READ_BUF(4);
1468 test_stateid->ts_num_ids = ntohl(*p++);
1469
Bryan Schumaker03cfb422012-01-27 10:22:49 -05001470 INIT_LIST_HEAD(&test_stateid->ts_stateid_list);
Bryan Schumaker17456802011-07-13 10:50:48 -04001471
1472 for (i = 0; i < test_stateid->ts_num_ids; i++) {
J. Bruce Fieldsd5e23382014-06-24 17:43:45 -04001473 stateid = svcxdr_tmpalloc(argp, sizeof(*stateid));
Bryan Schumaker03cfb422012-01-27 10:22:49 -05001474 if (!stateid) {
Al Viroafcf6792012-04-13 00:15:37 -04001475 status = nfserrno(-ENOMEM);
Bryan Schumaker03cfb422012-01-27 10:22:49 -05001476 goto out;
1477 }
1478
Bryan Schumaker03cfb422012-01-27 10:22:49 -05001479 INIT_LIST_HEAD(&stateid->ts_id_list);
1480 list_add_tail(&stateid->ts_id_list, &test_stateid->ts_stateid_list);
1481
1482 status = nfsd4_decode_stateid(argp, &stateid->ts_id_stateid);
Bryan Schumaker17456802011-07-13 10:50:48 -04001483 if (status)
Bryan Schumaker03cfb422012-01-27 10:22:49 -05001484 goto out;
Bryan Schumaker17456802011-07-13 10:50:48 -04001485 }
1486
1487 status = 0;
1488out:
1489 return status;
1490xdr_error:
1491 dprintk("NFSD: xdr error (%s:%d)\n", __FILE__, __LINE__);
1492 status = nfserr_bad_xdr;
1493 goto out;
1494}
1495
Mi Jinlong345c2842011-10-20 17:51:39 +08001496static __be32 nfsd4_decode_destroy_clientid(struct nfsd4_compoundargs *argp, struct nfsd4_destroy_clientid *dc)
1497{
1498 DECODE_HEAD;
1499
1500 READ_BUF(8);
1501 COPYMEM(&dc->clientid, 8);
1502
1503 DECODE_TAIL;
1504}
1505
J. Bruce Fields4dc6ec02010-04-19 15:11:28 -04001506static __be32 nfsd4_decode_reclaim_complete(struct nfsd4_compoundargs *argp, struct nfsd4_reclaim_complete *rc)
1507{
1508 DECODE_HEAD;
1509
1510 READ_BUF(4);
J. Bruce Fields06553992014-06-02 12:32:51 -04001511 rc->rca_one_fs = be32_to_cpup(p++);
J. Bruce Fields4dc6ec02010-04-19 15:11:28 -04001512
1513 DECODE_TAIL;
1514}
1515
Andy Adamson2db134e2009-04-03 08:27:55 +03001516static __be32
Anna Schumaker24bab492014-09-26 13:58:27 -04001517nfsd4_decode_seek(struct nfsd4_compoundargs *argp, struct nfsd4_seek *seek)
1518{
1519 DECODE_HEAD;
1520
1521 status = nfsd4_decode_stateid(argp, &seek->seek_stateid);
1522 if (status)
1523 return status;
1524
1525 READ_BUF(8 + 4);
1526 p = xdr_decode_hyper(p, &seek->seek_offset);
1527 seek->seek_whence = be32_to_cpup(p);
1528
1529 DECODE_TAIL;
1530}
1531
1532static __be32
Benny Halevy347e0ad2008-07-02 11:13:41 +03001533nfsd4_decode_noop(struct nfsd4_compoundargs *argp, void *p)
1534{
1535 return nfs_ok;
1536}
1537
Benny Halevy3c375c62008-07-02 11:14:01 +03001538static __be32
1539nfsd4_decode_notsupp(struct nfsd4_compoundargs *argp, void *p)
1540{
Benny Halevy1e685ec2009-03-04 23:06:06 +02001541 return nfserr_notsupp;
Benny Halevy3c375c62008-07-02 11:14:01 +03001542}
1543
Benny Halevy347e0ad2008-07-02 11:13:41 +03001544typedef __be32(*nfsd4_dec)(struct nfsd4_compoundargs *argp, void *);
1545
1546static nfsd4_dec nfsd4_dec_ops[] = {
J. Bruce Fieldsad1060c2008-07-18 15:04:16 -04001547 [OP_ACCESS] = (nfsd4_dec)nfsd4_decode_access,
1548 [OP_CLOSE] = (nfsd4_dec)nfsd4_decode_close,
1549 [OP_COMMIT] = (nfsd4_dec)nfsd4_decode_commit,
1550 [OP_CREATE] = (nfsd4_dec)nfsd4_decode_create,
1551 [OP_DELEGPURGE] = (nfsd4_dec)nfsd4_decode_notsupp,
1552 [OP_DELEGRETURN] = (nfsd4_dec)nfsd4_decode_delegreturn,
1553 [OP_GETATTR] = (nfsd4_dec)nfsd4_decode_getattr,
1554 [OP_GETFH] = (nfsd4_dec)nfsd4_decode_noop,
1555 [OP_LINK] = (nfsd4_dec)nfsd4_decode_link,
1556 [OP_LOCK] = (nfsd4_dec)nfsd4_decode_lock,
1557 [OP_LOCKT] = (nfsd4_dec)nfsd4_decode_lockt,
1558 [OP_LOCKU] = (nfsd4_dec)nfsd4_decode_locku,
1559 [OP_LOOKUP] = (nfsd4_dec)nfsd4_decode_lookup,
1560 [OP_LOOKUPP] = (nfsd4_dec)nfsd4_decode_noop,
1561 [OP_NVERIFY] = (nfsd4_dec)nfsd4_decode_verify,
1562 [OP_OPEN] = (nfsd4_dec)nfsd4_decode_open,
1563 [OP_OPENATTR] = (nfsd4_dec)nfsd4_decode_notsupp,
1564 [OP_OPEN_CONFIRM] = (nfsd4_dec)nfsd4_decode_open_confirm,
1565 [OP_OPEN_DOWNGRADE] = (nfsd4_dec)nfsd4_decode_open_downgrade,
1566 [OP_PUTFH] = (nfsd4_dec)nfsd4_decode_putfh,
Anna Schumakere1a90eb2013-10-30 10:00:20 -04001567 [OP_PUTPUBFH] = (nfsd4_dec)nfsd4_decode_putpubfh,
J. Bruce Fieldsad1060c2008-07-18 15:04:16 -04001568 [OP_PUTROOTFH] = (nfsd4_dec)nfsd4_decode_noop,
1569 [OP_READ] = (nfsd4_dec)nfsd4_decode_read,
1570 [OP_READDIR] = (nfsd4_dec)nfsd4_decode_readdir,
1571 [OP_READLINK] = (nfsd4_dec)nfsd4_decode_noop,
1572 [OP_REMOVE] = (nfsd4_dec)nfsd4_decode_remove,
1573 [OP_RENAME] = (nfsd4_dec)nfsd4_decode_rename,
1574 [OP_RENEW] = (nfsd4_dec)nfsd4_decode_renew,
1575 [OP_RESTOREFH] = (nfsd4_dec)nfsd4_decode_noop,
1576 [OP_SAVEFH] = (nfsd4_dec)nfsd4_decode_noop,
1577 [OP_SECINFO] = (nfsd4_dec)nfsd4_decode_secinfo,
1578 [OP_SETATTR] = (nfsd4_dec)nfsd4_decode_setattr,
1579 [OP_SETCLIENTID] = (nfsd4_dec)nfsd4_decode_setclientid,
1580 [OP_SETCLIENTID_CONFIRM] = (nfsd4_dec)nfsd4_decode_setclientid_confirm,
1581 [OP_VERIFY] = (nfsd4_dec)nfsd4_decode_verify,
1582 [OP_WRITE] = (nfsd4_dec)nfsd4_decode_write,
1583 [OP_RELEASE_LOCKOWNER] = (nfsd4_dec)nfsd4_decode_release_lockowner,
Andy Adamson2db134e2009-04-03 08:27:55 +03001584
1585 /* new operations for NFSv4.1 */
J. Bruce Fieldscb73a9f2012-11-01 18:09:48 -04001586 [OP_BACKCHANNEL_CTL] = (nfsd4_dec)nfsd4_decode_backchannel_ctl,
J. Bruce Fields1d1bc8f2010-10-04 23:12:59 -04001587 [OP_BIND_CONN_TO_SESSION]= (nfsd4_dec)nfsd4_decode_bind_conn_to_session,
Randy Dunlap9064caa2009-04-28 16:48:25 -07001588 [OP_EXCHANGE_ID] = (nfsd4_dec)nfsd4_decode_exchange_id,
1589 [OP_CREATE_SESSION] = (nfsd4_dec)nfsd4_decode_create_session,
1590 [OP_DESTROY_SESSION] = (nfsd4_dec)nfsd4_decode_destroy_session,
Bryan Schumakere1ca12d2011-07-13 11:04:21 -04001591 [OP_FREE_STATEID] = (nfsd4_dec)nfsd4_decode_free_stateid,
Randy Dunlap9064caa2009-04-28 16:48:25 -07001592 [OP_GET_DIR_DELEGATION] = (nfsd4_dec)nfsd4_decode_notsupp,
1593 [OP_GETDEVICEINFO] = (nfsd4_dec)nfsd4_decode_notsupp,
1594 [OP_GETDEVICELIST] = (nfsd4_dec)nfsd4_decode_notsupp,
1595 [OP_LAYOUTCOMMIT] = (nfsd4_dec)nfsd4_decode_notsupp,
1596 [OP_LAYOUTGET] = (nfsd4_dec)nfsd4_decode_notsupp,
1597 [OP_LAYOUTRETURN] = (nfsd4_dec)nfsd4_decode_notsupp,
J. Bruce Fields04f4ad12010-12-16 09:51:13 -05001598 [OP_SECINFO_NO_NAME] = (nfsd4_dec)nfsd4_decode_secinfo_no_name,
Randy Dunlap9064caa2009-04-28 16:48:25 -07001599 [OP_SEQUENCE] = (nfsd4_dec)nfsd4_decode_sequence,
1600 [OP_SET_SSV] = (nfsd4_dec)nfsd4_decode_notsupp,
Bryan Schumaker17456802011-07-13 10:50:48 -04001601 [OP_TEST_STATEID] = (nfsd4_dec)nfsd4_decode_test_stateid,
Randy Dunlap9064caa2009-04-28 16:48:25 -07001602 [OP_WANT_DELEGATION] = (nfsd4_dec)nfsd4_decode_notsupp,
Mi Jinlong345c2842011-10-20 17:51:39 +08001603 [OP_DESTROY_CLIENTID] = (nfsd4_dec)nfsd4_decode_destroy_clientid,
J. Bruce Fields4dc6ec02010-04-19 15:11:28 -04001604 [OP_RECLAIM_COMPLETE] = (nfsd4_dec)nfsd4_decode_reclaim_complete,
Anna Schumaker87a15a82014-09-26 13:58:26 -04001605
1606 /* new operations for NFSv4.2 */
1607 [OP_ALLOCATE] = (nfsd4_dec)nfsd4_decode_notsupp,
1608 [OP_COPY] = (nfsd4_dec)nfsd4_decode_notsupp,
1609 [OP_COPY_NOTIFY] = (nfsd4_dec)nfsd4_decode_notsupp,
1610 [OP_DEALLOCATE] = (nfsd4_dec)nfsd4_decode_notsupp,
1611 [OP_IO_ADVISE] = (nfsd4_dec)nfsd4_decode_notsupp,
1612 [OP_LAYOUTERROR] = (nfsd4_dec)nfsd4_decode_notsupp,
1613 [OP_LAYOUTSTATS] = (nfsd4_dec)nfsd4_decode_notsupp,
1614 [OP_OFFLOAD_CANCEL] = (nfsd4_dec)nfsd4_decode_notsupp,
1615 [OP_OFFLOAD_STATUS] = (nfsd4_dec)nfsd4_decode_notsupp,
1616 [OP_READ_PLUS] = (nfsd4_dec)nfsd4_decode_notsupp,
Anna Schumaker24bab492014-09-26 13:58:27 -04001617 [OP_SEEK] = (nfsd4_dec)nfsd4_decode_seek,
Anna Schumaker87a15a82014-09-26 13:58:26 -04001618 [OP_WRITE_SAME] = (nfsd4_dec)nfsd4_decode_notsupp,
Andy Adamson2db134e2009-04-03 08:27:55 +03001619};
1620
Anna Schumakere1a90eb2013-10-30 10:00:20 -04001621static inline bool
1622nfsd4_opnum_in_range(struct nfsd4_compoundargs *argp, struct nfsd4_op *op)
1623{
Anna Schumaker8217d142013-10-30 13:38:13 -04001624 if (op->opnum < FIRST_NFS4_OP)
Anna Schumakere1a90eb2013-10-30 10:00:20 -04001625 return false;
Anna Schumaker8217d142013-10-30 13:38:13 -04001626 else if (argp->minorversion == 0 && op->opnum > LAST_NFS40_OP)
Anna Schumakere1a90eb2013-10-30 10:00:20 -04001627 return false;
Anna Schumaker8217d142013-10-30 13:38:13 -04001628 else if (argp->minorversion == 1 && op->opnum > LAST_NFS41_OP)
1629 return false;
1630 else if (argp->minorversion == 2 && op->opnum > LAST_NFS42_OP)
Anna Schumakere1a90eb2013-10-30 10:00:20 -04001631 return false;
1632 return true;
1633}
Benny Halevyf2feb962008-07-02 11:14:22 +03001634
Benny Halevy347e0ad2008-07-02 11:13:41 +03001635static __be32
Linus Torvalds1da177e2005-04-16 15:20:36 -07001636nfsd4_decode_compound(struct nfsd4_compoundargs *argp)
1637{
1638 DECODE_HEAD;
1639 struct nfsd4_op *op;
J. Bruce Fields10910062011-01-24 12:11:02 -05001640 bool cachethis = false;
J. Bruce Fieldsa5cddc82014-05-12 18:10:58 -04001641 int auth_slack= argp->rqstp->rq_auth_slack;
1642 int max_reply = auth_slack + 8; /* opcnt, status */
J. Bruce Fieldsb0e35fd2014-02-04 10:36:59 -05001643 int readcount = 0;
1644 int readbytes = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001645 int i;
1646
Linus Torvalds1da177e2005-04-16 15:20:36 -07001647 READ_BUF(4);
J. Bruce Fields06553992014-06-02 12:32:51 -04001648 argp->taglen = be32_to_cpup(p++);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001649 READ_BUF(argp->taglen + 8);
1650 SAVEMEM(argp->tag, argp->taglen);
J. Bruce Fields06553992014-06-02 12:32:51 -04001651 argp->minorversion = be32_to_cpup(p++);
1652 argp->opcnt = be32_to_cpup(p++);
J. Bruce Fields4f0cefb2014-03-11 15:39:13 -04001653 max_reply += 4 + (XDR_QUADLEN(argp->taglen) << 2);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001654
1655 if (argp->taglen > NFSD4_MAX_TAGLEN)
1656 goto xdr_error;
1657 if (argp->opcnt > 100)
1658 goto xdr_error;
1659
Tobias Klausere8c96f82006-03-24 03:15:34 -08001660 if (argp->opcnt > ARRAY_SIZE(argp->iops)) {
J. Bruce Fields5d6031c2014-07-17 16:20:39 -04001661 argp->ops = kzalloc(argp->opcnt * sizeof(*argp->ops), GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001662 if (!argp->ops) {
1663 argp->ops = argp->iops;
Chuck Lever817cb9d2007-09-11 18:01:20 -04001664 dprintk("nfsd: couldn't allocate room for COMPOUND\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001665 goto xdr_error;
1666 }
1667 }
1668
Anna Schumakere1a90eb2013-10-30 10:00:20 -04001669 if (argp->minorversion > NFSD_SUPPORTED_MINOR_VERSION)
Benny Halevy30cff1f2008-07-02 11:13:18 +03001670 argp->opcnt = 0;
1671
Linus Torvalds1da177e2005-04-16 15:20:36 -07001672 for (i = 0; i < argp->opcnt; i++) {
1673 op = &argp->ops[i];
1674 op->replay = NULL;
1675
J. Bruce Fields8a61b182012-11-16 22:28:38 -05001676 READ_BUF(4);
J. Bruce Fields06553992014-06-02 12:32:51 -04001677 op->opnum = be32_to_cpup(p++);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001678
Anna Schumakere1a90eb2013-10-30 10:00:20 -04001679 if (nfsd4_opnum_in_range(argp, op))
1680 op->status = nfsd4_dec_ops[op->opnum](argp, &op->u);
Benny Halevy347e0ad2008-07-02 11:13:41 +03001681 else {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001682 op->opnum = OP_ILLEGAL;
1683 op->status = nfserr_op_illegal;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001684 }
J. Bruce Fields10910062011-01-24 12:11:02 -05001685 /*
1686 * We'll try to cache the result in the DRC if any one
1687 * op in the compound wants to be cached:
1688 */
1689 cachethis |= nfsd4_cache_this_op(op);
J. Bruce Fields6ff40de2013-11-05 15:07:16 -05001690
J. Bruce Fieldsb0e35fd2014-02-04 10:36:59 -05001691 if (op->opnum == OP_READ) {
1692 readcount++;
1693 readbytes += nfsd4_max_reply(argp->rqstp, op);
1694 } else
1695 max_reply += nfsd4_max_reply(argp->rqstp, op);
J. Bruce Fieldsf7b43d02014-08-12 11:41:40 -04001696 /*
1697 * OP_LOCK may return a conflicting lock. (Special case
1698 * because it will just skip encoding this if it runs
1699 * out of xdr buffer space, and it is the only operation
1700 * that behaves this way.)
1701 */
1702 if (op->opnum == OP_LOCK)
1703 max_reply += NFS4_OPAQUE_LIMIT;
J. Bruce Fieldse372ba62014-05-19 12:27:11 -04001704
1705 if (op->status) {
1706 argp->opcnt = i+1;
1707 break;
1708 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001709 }
J. Bruce Fields10910062011-01-24 12:11:02 -05001710 /* Sessions make the DRC unnecessary: */
1711 if (argp->minorversion)
1712 cachethis = false;
J. Bruce Fieldsb0e35fd2014-02-04 10:36:59 -05001713 svc_reserve(argp->rqstp, max_reply + readbytes);
J. Bruce Fields10910062011-01-24 12:11:02 -05001714 argp->rqstp->rq_cachetype = cachethis ? RC_REPLBUFF : RC_NOCACHE;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001715
J. Bruce Fieldsa5cddc82014-05-12 18:10:58 -04001716 if (readcount > 1 || max_reply > PAGE_SIZE - auth_slack)
J. Bruce Fieldsb0e35fd2014-02-04 10:36:59 -05001717 argp->rqstp->rq_splice_ok = false;
1718
Linus Torvalds1da177e2005-04-16 15:20:36 -07001719 DECODE_TAIL;
1720}
Linus Torvalds1da177e2005-04-16 15:20:36 -07001721
J. Bruce Fieldsd05d5742014-03-22 18:48:39 -04001722static __be32 *encode_change(__be32 *p, struct kstat *stat, struct inode *inode)
J. Bruce Fieldsc654b8a2009-04-16 17:33:25 -04001723{
1724 if (IS_I_VERSION(inode)) {
J. Bruce Fieldsd05d5742014-03-22 18:48:39 -04001725 p = xdr_encode_hyper(p, inode->i_version);
J. Bruce Fieldsc654b8a2009-04-16 17:33:25 -04001726 } else {
J. Bruce Fieldsd05d5742014-03-22 18:48:39 -04001727 *p++ = cpu_to_be32(stat->ctime.tv_sec);
1728 *p++ = cpu_to_be32(stat->ctime.tv_nsec);
J. Bruce Fieldsc654b8a2009-04-16 17:33:25 -04001729 }
J. Bruce Fieldsd05d5742014-03-22 18:48:39 -04001730 return p;
J. Bruce Fieldsc654b8a2009-04-16 17:33:25 -04001731}
1732
J. Bruce Fieldsd05d5742014-03-22 18:48:39 -04001733static __be32 *encode_cinfo(__be32 *p, struct nfsd4_change_info *c)
J. Bruce Fieldsc654b8a2009-04-16 17:33:25 -04001734{
J. Bruce Fieldsd05d5742014-03-22 18:48:39 -04001735 *p++ = cpu_to_be32(c->atomic);
J. Bruce Fieldsc654b8a2009-04-16 17:33:25 -04001736 if (c->change_supported) {
J. Bruce Fieldsd05d5742014-03-22 18:48:39 -04001737 p = xdr_encode_hyper(p, c->before_change);
1738 p = xdr_encode_hyper(p, c->after_change);
J. Bruce Fieldsc654b8a2009-04-16 17:33:25 -04001739 } else {
J. Bruce Fieldsd05d5742014-03-22 18:48:39 -04001740 *p++ = cpu_to_be32(c->before_ctime_sec);
1741 *p++ = cpu_to_be32(c->before_ctime_nsec);
1742 *p++ = cpu_to_be32(c->after_ctime_sec);
1743 *p++ = cpu_to_be32(c->after_ctime_nsec);
J. Bruce Fieldsc654b8a2009-04-16 17:33:25 -04001744 }
J. Bruce Fieldsd05d5742014-03-22 18:48:39 -04001745 return p;
J. Bruce Fieldsc654b8a2009-04-16 17:33:25 -04001746}
Linus Torvalds1da177e2005-04-16 15:20:36 -07001747
J.Bruce Fields81c3f412006-10-04 02:16:19 -07001748/* Encode as an array of strings the string given with components
Weston Andros Adamsone7a04442012-04-24 11:07:59 -04001749 * separated @sep, escaped with esc_enter and esc_exit.
J.Bruce Fields81c3f412006-10-04 02:16:19 -07001750 */
J. Bruce Fieldsddd1ea52013-08-27 21:32:25 -04001751static __be32 nfsd4_encode_components_esc(struct xdr_stream *xdr, char sep,
1752 char *components, char esc_enter,
1753 char esc_exit)
J.Bruce Fields81c3f412006-10-04 02:16:19 -07001754{
J. Bruce Fieldsddd1ea52013-08-27 21:32:25 -04001755 __be32 *p;
J. Bruce Fields082d4bd2013-08-29 15:42:52 -04001756 __be32 pathlen;
1757 int pathlen_offset;
J.Bruce Fields81c3f412006-10-04 02:16:19 -07001758 int strlen, count=0;
Weston Andros Adamsone7a04442012-04-24 11:07:59 -04001759 char *str, *end, *next;
J.Bruce Fields81c3f412006-10-04 02:16:19 -07001760
1761 dprintk("nfsd4_encode_components(%s)\n", components);
J. Bruce Fields082d4bd2013-08-29 15:42:52 -04001762
1763 pathlen_offset = xdr->buf->len;
J. Bruce Fieldsddd1ea52013-08-27 21:32:25 -04001764 p = xdr_reserve_space(xdr, 4);
1765 if (!p)
J.Bruce Fields81c3f412006-10-04 02:16:19 -07001766 return nfserr_resource;
J. Bruce Fields082d4bd2013-08-29 15:42:52 -04001767 p++; /* We will fill this in with @count later */
1768
J.Bruce Fields81c3f412006-10-04 02:16:19 -07001769 end = str = components;
1770 while (*end) {
Weston Andros Adamsone7a04442012-04-24 11:07:59 -04001771 bool found_esc = false;
1772
1773 /* try to parse as esc_start, ..., esc_end, sep */
1774 if (*str == esc_enter) {
1775 for (; *end && (*end != esc_exit); end++)
1776 /* find esc_exit or end of string */;
1777 next = end + 1;
1778 if (*end && (!*next || *next == sep)) {
1779 str++;
1780 found_esc = true;
1781 }
1782 }
1783
1784 if (!found_esc)
1785 for (; *end && (*end != sep); end++)
1786 /* find sep or end of string */;
1787
J.Bruce Fields81c3f412006-10-04 02:16:19 -07001788 strlen = end - str;
1789 if (strlen) {
J. Bruce Fieldsddd1ea52013-08-27 21:32:25 -04001790 p = xdr_reserve_space(xdr, strlen + 4);
1791 if (!p)
J.Bruce Fields81c3f412006-10-04 02:16:19 -07001792 return nfserr_resource;
J. Bruce Fields0c0c2672014-03-22 18:43:16 -04001793 p = xdr_encode_opaque(p, str, strlen);
J.Bruce Fields81c3f412006-10-04 02:16:19 -07001794 count++;
1795 }
1796 else
1797 end++;
1798 str = end;
1799 }
J. Bruce Fields082d4bd2013-08-29 15:42:52 -04001800 pathlen = htonl(xdr->buf->len - pathlen_offset);
1801 write_bytes_to_xdr_buf(xdr->buf, pathlen_offset, &pathlen, 4);
J.Bruce Fields81c3f412006-10-04 02:16:19 -07001802 return 0;
1803}
1804
Weston Andros Adamsone7a04442012-04-24 11:07:59 -04001805/* Encode as an array of strings the string given with components
1806 * separated @sep.
1807 */
J. Bruce Fieldsddd1ea52013-08-27 21:32:25 -04001808static __be32 nfsd4_encode_components(struct xdr_stream *xdr, char sep,
1809 char *components)
Weston Andros Adamsone7a04442012-04-24 11:07:59 -04001810{
J. Bruce Fieldsddd1ea52013-08-27 21:32:25 -04001811 return nfsd4_encode_components_esc(xdr, sep, components, 0, 0);
Weston Andros Adamsone7a04442012-04-24 11:07:59 -04001812}
1813
J.Bruce Fields81c3f412006-10-04 02:16:19 -07001814/*
1815 * encode a location element of a fs_locations structure
1816 */
J. Bruce Fieldsddd1ea52013-08-27 21:32:25 -04001817static __be32 nfsd4_encode_fs_location4(struct xdr_stream *xdr,
1818 struct nfsd4_fs_location *location)
J.Bruce Fields81c3f412006-10-04 02:16:19 -07001819{
Al Virob37ad282006-10-19 23:28:59 -07001820 __be32 status;
J.Bruce Fields81c3f412006-10-04 02:16:19 -07001821
J. Bruce Fieldsddd1ea52013-08-27 21:32:25 -04001822 status = nfsd4_encode_components_esc(xdr, ':', location->hosts,
Weston Andros Adamsone7a04442012-04-24 11:07:59 -04001823 '[', ']');
J.Bruce Fields81c3f412006-10-04 02:16:19 -07001824 if (status)
1825 return status;
J. Bruce Fieldsddd1ea52013-08-27 21:32:25 -04001826 status = nfsd4_encode_components(xdr, '/', location->path);
J.Bruce Fields81c3f412006-10-04 02:16:19 -07001827 if (status)
1828 return status;
J.Bruce Fields81c3f412006-10-04 02:16:19 -07001829 return 0;
1830}
1831
1832/*
Trond Myklebusted748aa2011-09-12 19:37:06 -04001833 * Encode a path in RFC3530 'pathname4' format
J.Bruce Fields81c3f412006-10-04 02:16:19 -07001834 */
J. Bruce Fieldsddd1ea52013-08-27 21:32:25 -04001835static __be32 nfsd4_encode_path(struct xdr_stream *xdr,
1836 const struct path *root,
1837 const struct path *path)
J.Bruce Fields81c3f412006-10-04 02:16:19 -07001838{
Al Viro301f0262013-09-01 16:06:39 -04001839 struct path cur = *path;
J. Bruce Fieldsddd1ea52013-08-27 21:32:25 -04001840 __be32 *p;
Trond Myklebusted748aa2011-09-12 19:37:06 -04001841 struct dentry **components = NULL;
1842 unsigned int ncomponents = 0;
1843 __be32 err = nfserr_jukebox;
J.Bruce Fields81c3f412006-10-04 02:16:19 -07001844
Trond Myklebusted748aa2011-09-12 19:37:06 -04001845 dprintk("nfsd4_encode_components(");
J.Bruce Fields81c3f412006-10-04 02:16:19 -07001846
Trond Myklebusted748aa2011-09-12 19:37:06 -04001847 path_get(&cur);
1848 /* First walk the path up to the nfsd root, and store the
1849 * dentries/path components in an array.
1850 */
1851 for (;;) {
1852 if (cur.dentry == root->dentry && cur.mnt == root->mnt)
1853 break;
1854 if (cur.dentry == cur.mnt->mnt_root) {
1855 if (follow_up(&cur))
1856 continue;
1857 goto out_free;
1858 }
1859 if ((ncomponents & 15) == 0) {
1860 struct dentry **new;
1861 new = krealloc(components,
1862 sizeof(*new) * (ncomponents + 16),
1863 GFP_KERNEL);
1864 if (!new)
1865 goto out_free;
1866 components = new;
1867 }
1868 components[ncomponents++] = cur.dentry;
1869 cur.dentry = dget_parent(cur.dentry);
J.Bruce Fields81c3f412006-10-04 02:16:19 -07001870 }
J. Bruce Fieldsddd1ea52013-08-27 21:32:25 -04001871 err = nfserr_resource;
1872 p = xdr_reserve_space(xdr, 4);
1873 if (!p)
Trond Myklebusted748aa2011-09-12 19:37:06 -04001874 goto out_free;
J. Bruce Fieldsc373b0a2014-03-22 17:09:18 -04001875 *p++ = cpu_to_be32(ncomponents);
Trond Myklebusted748aa2011-09-12 19:37:06 -04001876
1877 while (ncomponents) {
1878 struct dentry *dentry = components[ncomponents - 1];
Al Viro301f0262013-09-01 16:06:39 -04001879 unsigned int len;
Trond Myklebusted748aa2011-09-12 19:37:06 -04001880
Al Viro301f0262013-09-01 16:06:39 -04001881 spin_lock(&dentry->d_lock);
1882 len = dentry->d_name.len;
J. Bruce Fieldsddd1ea52013-08-27 21:32:25 -04001883 p = xdr_reserve_space(xdr, len + 4);
1884 if (!p) {
Al Viro301f0262013-09-01 16:06:39 -04001885 spin_unlock(&dentry->d_lock);
Trond Myklebusted748aa2011-09-12 19:37:06 -04001886 goto out_free;
Al Viro301f0262013-09-01 16:06:39 -04001887 }
J. Bruce Fields0c0c2672014-03-22 18:43:16 -04001888 p = xdr_encode_opaque(p, dentry->d_name.name, len);
Trond Myklebusted748aa2011-09-12 19:37:06 -04001889 dprintk("/%s", dentry->d_name.name);
Al Viro301f0262013-09-01 16:06:39 -04001890 spin_unlock(&dentry->d_lock);
Trond Myklebusted748aa2011-09-12 19:37:06 -04001891 dput(dentry);
1892 ncomponents--;
1893 }
1894
Trond Myklebusted748aa2011-09-12 19:37:06 -04001895 err = 0;
1896out_free:
1897 dprintk(")\n");
1898 while (ncomponents)
1899 dput(components[--ncomponents]);
1900 kfree(components);
1901 path_put(&cur);
1902 return err;
1903}
1904
J. Bruce Fieldsddd1ea52013-08-27 21:32:25 -04001905static __be32 nfsd4_encode_fsloc_fsroot(struct xdr_stream *xdr,
1906 struct svc_rqst *rqstp, const struct path *path)
Trond Myklebusted748aa2011-09-12 19:37:06 -04001907{
1908 struct svc_export *exp_ps;
1909 __be32 res;
1910
1911 exp_ps = rqst_find_fsidzero_export(rqstp);
1912 if (IS_ERR(exp_ps))
1913 return nfserrno(PTR_ERR(exp_ps));
J. Bruce Fieldsddd1ea52013-08-27 21:32:25 -04001914 res = nfsd4_encode_path(xdr, &exp_ps->ex_path, path);
Trond Myklebusted748aa2011-09-12 19:37:06 -04001915 exp_put(exp_ps);
1916 return res;
J.Bruce Fields81c3f412006-10-04 02:16:19 -07001917}
1918
1919/*
1920 * encode a fs_locations structure
1921 */
J. Bruce Fieldsddd1ea52013-08-27 21:32:25 -04001922static __be32 nfsd4_encode_fs_locations(struct xdr_stream *xdr,
1923 struct svc_rqst *rqstp, struct svc_export *exp)
J.Bruce Fields81c3f412006-10-04 02:16:19 -07001924{
Al Virob37ad282006-10-19 23:28:59 -07001925 __be32 status;
Al Virocc45f012006-10-19 23:28:44 -07001926 int i;
J. Bruce Fieldsddd1ea52013-08-27 21:32:25 -04001927 __be32 *p;
J.Bruce Fields81c3f412006-10-04 02:16:19 -07001928 struct nfsd4_fs_locations *fslocs = &exp->ex_fslocs;
J.Bruce Fields81c3f412006-10-04 02:16:19 -07001929
J. Bruce Fieldsddd1ea52013-08-27 21:32:25 -04001930 status = nfsd4_encode_fsloc_fsroot(xdr, rqstp, &exp->ex_path);
J.Bruce Fields81c3f412006-10-04 02:16:19 -07001931 if (status)
1932 return status;
J. Bruce Fieldsddd1ea52013-08-27 21:32:25 -04001933 p = xdr_reserve_space(xdr, 4);
1934 if (!p)
J.Bruce Fields81c3f412006-10-04 02:16:19 -07001935 return nfserr_resource;
J. Bruce Fieldsc373b0a2014-03-22 17:09:18 -04001936 *p++ = cpu_to_be32(fslocs->locations_count);
J.Bruce Fields81c3f412006-10-04 02:16:19 -07001937 for (i=0; i<fslocs->locations_count; i++) {
J. Bruce Fieldsddd1ea52013-08-27 21:32:25 -04001938 status = nfsd4_encode_fs_location4(xdr, &fslocs->locations[i]);
J.Bruce Fields81c3f412006-10-04 02:16:19 -07001939 if (status)
1940 return status;
1941 }
J.Bruce Fields81c3f412006-10-04 02:16:19 -07001942 return 0;
1943}
Linus Torvalds1da177e2005-04-16 15:20:36 -07001944
J. Bruce Fields3d2544b2011-08-15 11:49:30 -04001945static u32 nfs4_file_type(umode_t mode)
1946{
1947 switch (mode & S_IFMT) {
1948 case S_IFIFO: return NF4FIFO;
1949 case S_IFCHR: return NF4CHR;
1950 case S_IFDIR: return NF4DIR;
1951 case S_IFBLK: return NF4BLK;
1952 case S_IFLNK: return NF4LNK;
1953 case S_IFREG: return NF4REG;
1954 case S_IFSOCK: return NF4SOCK;
1955 default: return NF4BAD;
1956 };
1957}
Linus Torvalds1da177e2005-04-16 15:20:36 -07001958
Al Virob37ad282006-10-19 23:28:59 -07001959static inline __be32
J. Bruce Fieldsddd1ea52013-08-27 21:32:25 -04001960nfsd4_encode_aclname(struct xdr_stream *xdr, struct svc_rqst *rqstp,
1961 struct nfs4_ace *ace)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001962{
J. Bruce Fields35541162014-01-08 09:49:01 -05001963 if (ace->whotype != NFS4_ACL_WHO_NAMED)
J. Bruce Fieldsddd1ea52013-08-27 21:32:25 -04001964 return nfs4_acl_write_who(xdr, ace->whotype);
J. Bruce Fields35541162014-01-08 09:49:01 -05001965 else if (ace->flag & NFS4_ACE_IDENTIFIER_GROUP)
J. Bruce Fieldsddd1ea52013-08-27 21:32:25 -04001966 return nfsd4_encode_group(xdr, rqstp, ace->who_gid);
J. Bruce Fields35541162014-01-08 09:49:01 -05001967 else
J. Bruce Fieldsddd1ea52013-08-27 21:32:25 -04001968 return nfsd4_encode_user(xdr, rqstp, ace->who_uid);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001969}
1970
J.Bruce Fields42ca0992006-10-04 02:16:20 -07001971#define WORD0_ABSENT_FS_ATTRS (FATTR4_WORD0_FS_LOCATIONS | FATTR4_WORD0_FSID | \
1972 FATTR4_WORD0_RDATTR_ERROR)
1973#define WORD1_ABSENT_FS_ATTRS FATTR4_WORD1_MOUNTED_ON_FILEID
1974
David Quigley18032ca2013-05-02 13:19:10 -04001975#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
1976static inline __be32
J. Bruce Fieldsddd1ea52013-08-27 21:32:25 -04001977nfsd4_encode_security_label(struct xdr_stream *xdr, struct svc_rqst *rqstp,
1978 void *context, int len)
David Quigley18032ca2013-05-02 13:19:10 -04001979{
J. Bruce Fieldsddd1ea52013-08-27 21:32:25 -04001980 __be32 *p;
David Quigley18032ca2013-05-02 13:19:10 -04001981
J. Bruce Fieldsddd1ea52013-08-27 21:32:25 -04001982 p = xdr_reserve_space(xdr, len + 4 + 4 + 4);
1983 if (!p)
David Quigley18032ca2013-05-02 13:19:10 -04001984 return nfserr_resource;
1985
1986 /*
1987 * For now we use a 0 here to indicate the null translation; in
1988 * the future we may place a call to translation code here.
1989 */
J. Bruce Fieldsc373b0a2014-03-22 17:09:18 -04001990 *p++ = cpu_to_be32(0); /* lfs */
1991 *p++ = cpu_to_be32(0); /* pi */
David Quigley18032ca2013-05-02 13:19:10 -04001992 p = xdr_encode_opaque(p, context, len);
David Quigley18032ca2013-05-02 13:19:10 -04001993 return 0;
1994}
1995#else
1996static inline __be32
J. Bruce Fieldsddd1ea52013-08-27 21:32:25 -04001997nfsd4_encode_security_label(struct xdr_stream *xdr, struct svc_rqst *rqstp,
1998 void *context, int len)
David Quigley18032ca2013-05-02 13:19:10 -04001999{ return 0; }
2000#endif
2001
Al Virob37ad282006-10-19 23:28:59 -07002002static __be32 fattr_handle_absent_fs(u32 *bmval0, u32 *bmval1, u32 *rdattr_err)
J.Bruce Fields42ca0992006-10-04 02:16:20 -07002003{
2004 /* As per referral draft: */
2005 if (*bmval0 & ~WORD0_ABSENT_FS_ATTRS ||
2006 *bmval1 & ~WORD1_ABSENT_FS_ATTRS) {
2007 if (*bmval0 & FATTR4_WORD0_RDATTR_ERROR ||
2008 *bmval0 & FATTR4_WORD0_FS_LOCATIONS)
2009 *rdattr_err = NFSERR_MOVED;
2010 else
2011 return nfserr_moved;
2012 }
2013 *bmval0 &= WORD0_ABSENT_FS_ATTRS;
2014 *bmval1 &= WORD1_ABSENT_FS_ATTRS;
2015 return 0;
2016}
Linus Torvalds1da177e2005-04-16 15:20:36 -07002017
J. Bruce Fieldsae7095a2012-10-01 17:50:56 -04002018
2019static int get_parent_attributes(struct svc_export *exp, struct kstat *stat)
2020{
2021 struct path path = exp->ex_path;
2022 int err;
2023
2024 path_get(&path);
2025 while (follow_up(&path)) {
2026 if (path.dentry != path.mnt->mnt_root)
2027 break;
2028 }
Al Viro3dadecc2013-01-24 02:18:08 -05002029 err = vfs_getattr(&path, stat);
J. Bruce Fieldsae7095a2012-10-01 17:50:56 -04002030 path_put(&path);
2031 return err;
2032}
2033
Linus Torvalds1da177e2005-04-16 15:20:36 -07002034/*
2035 * Note: @fhp can be NULL; in this case, we might have to compose the filehandle
2036 * ourselves.
Linus Torvalds1da177e2005-04-16 15:20:36 -07002037 */
Jeff Laytonda2ebce2014-05-30 09:09:25 -04002038static __be32
J. Bruce Fieldsd5184652013-08-26 16:04:46 -04002039nfsd4_encode_fattr(struct xdr_stream *xdr, struct svc_fh *fhp,
2040 struct svc_export *exp,
2041 struct dentry *dentry, u32 *bmval,
Frank Filz406a7ea2007-11-27 11:34:05 -08002042 struct svc_rqst *rqstp, int ignore_crossmnt)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002043{
2044 u32 bmval0 = bmval[0];
2045 u32 bmval1 = bmval[1];
Andy Adamson7e705702009-04-03 08:29:11 +03002046 u32 bmval2 = bmval[2];
Linus Torvalds1da177e2005-04-16 15:20:36 -07002047 struct kstat stat;
J. Bruce Fieldsd50e6132014-01-15 12:21:12 -05002048 struct svc_fh *tempfh = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002049 struct kstatfs statfs;
J. Bruce Fieldsddd1ea52013-08-27 21:32:25 -04002050 __be32 *p;
J. Bruce Fields1fcea5b2014-02-26 20:17:02 -05002051 int starting_len = xdr->buf->len;
J. Bruce Fields082d4bd2013-08-29 15:42:52 -04002052 int attrlen_offset;
2053 __be32 attrlen;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002054 u32 dummy;
2055 u64 dummy64;
J.Bruce Fields42ca0992006-10-04 02:16:20 -07002056 u32 rdattr_err = 0;
Al Virob37ad282006-10-19 23:28:59 -07002057 __be32 status;
Al Virob8dd7b92006-10-19 23:29:01 -07002058 int err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002059 int aclsupport = 0;
2060 struct nfs4_acl *acl = NULL;
David Quigley18032ca2013-05-02 13:19:10 -04002061 void *context = NULL;
2062 int contextlen;
2063 bool contextsupport = false;
Andy Adamson7e705702009-04-03 08:29:11 +03002064 struct nfsd4_compoundres *resp = rqstp->rq_resp;
2065 u32 minorversion = resp->cstate.minorversion;
Christoph Hellwigebabe9a2010-07-07 18:53:11 +02002066 struct path path = {
2067 .mnt = exp->ex_path.mnt,
2068 .dentry = dentry,
2069 };
Stanislav Kinsbursky3d733712012-11-27 14:11:44 +03002070 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002071
2072 BUG_ON(bmval1 & NFSD_WRITEONLY_ATTRS_WORD1);
Andy Adamson7e705702009-04-03 08:29:11 +03002073 BUG_ON(bmval0 & ~nfsd_suppattrs0(minorversion));
2074 BUG_ON(bmval1 & ~nfsd_suppattrs1(minorversion));
2075 BUG_ON(bmval2 & ~nfsd_suppattrs2(minorversion));
Linus Torvalds1da177e2005-04-16 15:20:36 -07002076
J.Bruce Fields42ca0992006-10-04 02:16:20 -07002077 if (exp->ex_fslocs.migrated) {
Andy Adamson7e705702009-04-03 08:29:11 +03002078 BUG_ON(bmval[2]);
J.Bruce Fields42ca0992006-10-04 02:16:20 -07002079 status = fattr_handle_absent_fs(&bmval0, &bmval1, &rdattr_err);
2080 if (status)
2081 goto out;
2082 }
2083
Al Viro3dadecc2013-01-24 02:18:08 -05002084 err = vfs_getattr(&path, &stat);
Al Virob8dd7b92006-10-19 23:29:01 -07002085 if (err)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002086 goto out_nfserr;
Christoph Hellwig12337902014-05-28 10:46:13 +02002087 if ((bmval0 & (FATTR4_WORD0_FILES_AVAIL | FATTR4_WORD0_FILES_FREE |
2088 FATTR4_WORD0_FILES_TOTAL | FATTR4_WORD0_MAXNAME)) ||
Linus Torvalds1da177e2005-04-16 15:20:36 -07002089 (bmval1 & (FATTR4_WORD1_SPACE_AVAIL | FATTR4_WORD1_SPACE_FREE |
2090 FATTR4_WORD1_SPACE_TOTAL))) {
Christoph Hellwigebabe9a2010-07-07 18:53:11 +02002091 err = vfs_statfs(&path, &statfs);
Al Virob8dd7b92006-10-19 23:29:01 -07002092 if (err)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002093 goto out_nfserr;
2094 }
2095 if ((bmval0 & (FATTR4_WORD0_FILEHANDLE | FATTR4_WORD0_FSID)) && !fhp) {
J. Bruce Fieldsd50e6132014-01-15 12:21:12 -05002096 tempfh = kmalloc(sizeof(struct svc_fh), GFP_KERNEL);
2097 status = nfserr_jukebox;
2098 if (!tempfh)
2099 goto out;
2100 fh_init(tempfh, NFS4_FHSIZE);
2101 status = fh_compose(tempfh, exp, dentry, NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002102 if (status)
2103 goto out;
J. Bruce Fieldsd50e6132014-01-15 12:21:12 -05002104 fhp = tempfh;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002105 }
2106 if (bmval0 & (FATTR4_WORD0_ACL | FATTR4_WORD0_ACLSUPPORT
2107 | FATTR4_WORD0_SUPPORTED_ATTRS)) {
Al Virob8dd7b92006-10-19 23:29:01 -07002108 err = nfsd4_get_nfs4_acl(rqstp, dentry, &acl);
2109 aclsupport = (err == 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002110 if (bmval0 & FATTR4_WORD0_ACL) {
Al Virob8dd7b92006-10-19 23:29:01 -07002111 if (err == -EOPNOTSUPP)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002112 bmval0 &= ~FATTR4_WORD0_ACL;
Al Virob8dd7b92006-10-19 23:29:01 -07002113 else if (err == -EINVAL) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002114 status = nfserr_attrnotsupp;
2115 goto out;
Al Virob8dd7b92006-10-19 23:29:01 -07002116 } else if (err != 0)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002117 goto out_nfserr;
2118 }
2119 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002120
David Quigley18032ca2013-05-02 13:19:10 -04002121#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
2122 if ((bmval[2] & FATTR4_WORD2_SECURITY_LABEL) ||
2123 bmval[0] & FATTR4_WORD0_SUPPORTED_ATTRS) {
2124 err = security_inode_getsecctx(dentry->d_inode,
2125 &context, &contextlen);
2126 contextsupport = (err == 0);
2127 if (bmval2 & FATTR4_WORD2_SECURITY_LABEL) {
2128 if (err == -EOPNOTSUPP)
2129 bmval2 &= ~FATTR4_WORD2_SECURITY_LABEL;
2130 else if (err)
2131 goto out_nfserr;
2132 }
2133 }
2134#endif /* CONFIG_NFSD_V4_SECURITY_LABEL */
2135
Benny Halevy2b44f1b2010-09-30 20:47:46 +02002136 if (bmval2) {
J. Bruce Fieldsddd1ea52013-08-27 21:32:25 -04002137 p = xdr_reserve_space(xdr, 16);
2138 if (!p)
Benny Halevy2b44f1b2010-09-30 20:47:46 +02002139 goto out_resource;
J. Bruce Fieldsc373b0a2014-03-22 17:09:18 -04002140 *p++ = cpu_to_be32(3);
2141 *p++ = cpu_to_be32(bmval0);
2142 *p++ = cpu_to_be32(bmval1);
2143 *p++ = cpu_to_be32(bmval2);
Benny Halevy2b44f1b2010-09-30 20:47:46 +02002144 } else if (bmval1) {
J. Bruce Fieldsddd1ea52013-08-27 21:32:25 -04002145 p = xdr_reserve_space(xdr, 12);
2146 if (!p)
Benny Halevy2b44f1b2010-09-30 20:47:46 +02002147 goto out_resource;
J. Bruce Fieldsc373b0a2014-03-22 17:09:18 -04002148 *p++ = cpu_to_be32(2);
2149 *p++ = cpu_to_be32(bmval0);
2150 *p++ = cpu_to_be32(bmval1);
Andy Adamson7e705702009-04-03 08:29:11 +03002151 } else {
J. Bruce Fieldsddd1ea52013-08-27 21:32:25 -04002152 p = xdr_reserve_space(xdr, 8);
2153 if (!p)
Benny Halevy2b44f1b2010-09-30 20:47:46 +02002154 goto out_resource;
J. Bruce Fieldsc373b0a2014-03-22 17:09:18 -04002155 *p++ = cpu_to_be32(1);
2156 *p++ = cpu_to_be32(bmval0);
Andy Adamson7e705702009-04-03 08:29:11 +03002157 }
J. Bruce Fields082d4bd2013-08-29 15:42:52 -04002158
2159 attrlen_offset = xdr->buf->len;
J. Bruce Fieldsddd1ea52013-08-27 21:32:25 -04002160 p = xdr_reserve_space(xdr, 4);
2161 if (!p)
2162 goto out_resource;
J. Bruce Fields082d4bd2013-08-29 15:42:52 -04002163 p++; /* to be backfilled later */
Linus Torvalds1da177e2005-04-16 15:20:36 -07002164
2165 if (bmval0 & FATTR4_WORD0_SUPPORTED_ATTRS) {
Andy Adamson7e705702009-04-03 08:29:11 +03002166 u32 word0 = nfsd_suppattrs0(minorversion);
2167 u32 word1 = nfsd_suppattrs1(minorversion);
2168 u32 word2 = nfsd_suppattrs2(minorversion);
2169
J.Bruce Fields42ca0992006-10-04 02:16:20 -07002170 if (!aclsupport)
2171 word0 &= ~FATTR4_WORD0_ACL;
David Quigley18032ca2013-05-02 13:19:10 -04002172 if (!contextsupport)
2173 word2 &= ~FATTR4_WORD2_SECURITY_LABEL;
Andy Adamson7e705702009-04-03 08:29:11 +03002174 if (!word2) {
J. Bruce Fieldsddd1ea52013-08-27 21:32:25 -04002175 p = xdr_reserve_space(xdr, 12);
2176 if (!p)
Benny Halevy2b44f1b2010-09-30 20:47:46 +02002177 goto out_resource;
J. Bruce Fieldsc373b0a2014-03-22 17:09:18 -04002178 *p++ = cpu_to_be32(2);
2179 *p++ = cpu_to_be32(word0);
2180 *p++ = cpu_to_be32(word1);
Andy Adamson7e705702009-04-03 08:29:11 +03002181 } else {
J. Bruce Fieldsddd1ea52013-08-27 21:32:25 -04002182 p = xdr_reserve_space(xdr, 16);
2183 if (!p)
Benny Halevy2b44f1b2010-09-30 20:47:46 +02002184 goto out_resource;
J. Bruce Fieldsc373b0a2014-03-22 17:09:18 -04002185 *p++ = cpu_to_be32(3);
2186 *p++ = cpu_to_be32(word0);
2187 *p++ = cpu_to_be32(word1);
2188 *p++ = cpu_to_be32(word2);
Andy Adamson7e705702009-04-03 08:29:11 +03002189 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002190 }
2191 if (bmval0 & FATTR4_WORD0_TYPE) {
J. Bruce Fieldsddd1ea52013-08-27 21:32:25 -04002192 p = xdr_reserve_space(xdr, 4);
2193 if (!p)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002194 goto out_resource;
J. Bruce Fields3d2544b2011-08-15 11:49:30 -04002195 dummy = nfs4_file_type(stat.mode);
J. Bruce Fields6b6d81372013-01-16 17:11:11 -05002196 if (dummy == NF4BAD) {
2197 status = nfserr_serverfault;
2198 goto out;
2199 }
J. Bruce Fieldsc373b0a2014-03-22 17:09:18 -04002200 *p++ = cpu_to_be32(dummy);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002201 }
2202 if (bmval0 & FATTR4_WORD0_FH_EXPIRE_TYPE) {
J. Bruce Fieldsddd1ea52013-08-27 21:32:25 -04002203 p = xdr_reserve_space(xdr, 4);
2204 if (!p)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002205 goto out_resource;
NeilBrown49640002005-06-23 22:02:58 -07002206 if (exp->ex_flags & NFSEXP_NOSUBTREECHECK)
J. Bruce Fieldsc373b0a2014-03-22 17:09:18 -04002207 *p++ = cpu_to_be32(NFS4_FH_PERSISTENT);
NeilBrown49640002005-06-23 22:02:58 -07002208 else
J. Bruce Fieldsc373b0a2014-03-22 17:09:18 -04002209 *p++ = cpu_to_be32(NFS4_FH_PERSISTENT|
2210 NFS4_FH_VOL_RENAME);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002211 }
2212 if (bmval0 & FATTR4_WORD0_CHANGE) {
J. Bruce Fieldsddd1ea52013-08-27 21:32:25 -04002213 p = xdr_reserve_space(xdr, 8);
2214 if (!p)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002215 goto out_resource;
J. Bruce Fieldsd05d5742014-03-22 18:48:39 -04002216 p = encode_change(p, &stat, dentry->d_inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002217 }
2218 if (bmval0 & FATTR4_WORD0_SIZE) {
J. Bruce Fieldsddd1ea52013-08-27 21:32:25 -04002219 p = xdr_reserve_space(xdr, 8);
2220 if (!p)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002221 goto out_resource;
J. Bruce Fieldsb64c7f32014-03-22 17:11:35 -04002222 p = xdr_encode_hyper(p, stat.size);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002223 }
2224 if (bmval0 & FATTR4_WORD0_LINK_SUPPORT) {
J. Bruce Fieldsddd1ea52013-08-27 21:32:25 -04002225 p = xdr_reserve_space(xdr, 4);
2226 if (!p)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002227 goto out_resource;
J. Bruce Fieldsc373b0a2014-03-22 17:09:18 -04002228 *p++ = cpu_to_be32(1);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002229 }
2230 if (bmval0 & FATTR4_WORD0_SYMLINK_SUPPORT) {
J. Bruce Fieldsddd1ea52013-08-27 21:32:25 -04002231 p = xdr_reserve_space(xdr, 4);
2232 if (!p)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002233 goto out_resource;
J. Bruce Fieldsc373b0a2014-03-22 17:09:18 -04002234 *p++ = cpu_to_be32(1);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002235 }
2236 if (bmval0 & FATTR4_WORD0_NAMED_ATTR) {
J. Bruce Fieldsddd1ea52013-08-27 21:32:25 -04002237 p = xdr_reserve_space(xdr, 4);
2238 if (!p)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002239 goto out_resource;
J. Bruce Fieldsc373b0a2014-03-22 17:09:18 -04002240 *p++ = cpu_to_be32(0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002241 }
2242 if (bmval0 & FATTR4_WORD0_FSID) {
J. Bruce Fieldsddd1ea52013-08-27 21:32:25 -04002243 p = xdr_reserve_space(xdr, 16);
2244 if (!p)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002245 goto out_resource;
J.Bruce Fields42ca0992006-10-04 02:16:20 -07002246 if (exp->ex_fslocs.migrated) {
J. Bruce Fieldsb64c7f32014-03-22 17:11:35 -04002247 p = xdr_encode_hyper(p, NFS4_REFERRAL_FSID_MAJOR);
2248 p = xdr_encode_hyper(p, NFS4_REFERRAL_FSID_MINOR);
NeilBrownaf6a4e22007-02-14 00:33:12 -08002249 } else switch(fsid_source(fhp)) {
2250 case FSIDSOURCE_FSID:
J. Bruce Fieldsb64c7f32014-03-22 17:11:35 -04002251 p = xdr_encode_hyper(p, (u64)exp->ex_fsid);
2252 p = xdr_encode_hyper(p, (u64)0);
NeilBrownaf6a4e22007-02-14 00:33:12 -08002253 break;
2254 case FSIDSOURCE_DEV:
J. Bruce Fieldsc373b0a2014-03-22 17:09:18 -04002255 *p++ = cpu_to_be32(0);
2256 *p++ = cpu_to_be32(MAJOR(stat.dev));
2257 *p++ = cpu_to_be32(0);
2258 *p++ = cpu_to_be32(MINOR(stat.dev));
NeilBrownaf6a4e22007-02-14 00:33:12 -08002259 break;
2260 case FSIDSOURCE_UUID:
Kinglong Mee94eb3682014-05-23 20:00:19 +08002261 p = xdr_encode_opaque_fixed(p, exp->ex_uuid,
2262 EX_UUID_LEN);
NeilBrownaf6a4e22007-02-14 00:33:12 -08002263 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002264 }
2265 }
2266 if (bmval0 & FATTR4_WORD0_UNIQUE_HANDLES) {
J. Bruce Fieldsddd1ea52013-08-27 21:32:25 -04002267 p = xdr_reserve_space(xdr, 4);
2268 if (!p)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002269 goto out_resource;
J. Bruce Fieldsc373b0a2014-03-22 17:09:18 -04002270 *p++ = cpu_to_be32(0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002271 }
2272 if (bmval0 & FATTR4_WORD0_LEASE_TIME) {
J. Bruce Fieldsddd1ea52013-08-27 21:32:25 -04002273 p = xdr_reserve_space(xdr, 4);
2274 if (!p)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002275 goto out_resource;
J. Bruce Fieldsc373b0a2014-03-22 17:09:18 -04002276 *p++ = cpu_to_be32(nn->nfsd4_lease);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002277 }
2278 if (bmval0 & FATTR4_WORD0_RDATTR_ERROR) {
J. Bruce Fieldsddd1ea52013-08-27 21:32:25 -04002279 p = xdr_reserve_space(xdr, 4);
2280 if (!p)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002281 goto out_resource;
J. Bruce Fieldsc373b0a2014-03-22 17:09:18 -04002282 *p++ = cpu_to_be32(rdattr_err);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002283 }
2284 if (bmval0 & FATTR4_WORD0_ACL) {
2285 struct nfs4_ace *ace;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002286
2287 if (acl == NULL) {
J. Bruce Fieldsddd1ea52013-08-27 21:32:25 -04002288 p = xdr_reserve_space(xdr, 4);
2289 if (!p)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002290 goto out_resource;
2291
J. Bruce Fieldsc373b0a2014-03-22 17:09:18 -04002292 *p++ = cpu_to_be32(0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002293 goto out_acl;
2294 }
J. Bruce Fieldsddd1ea52013-08-27 21:32:25 -04002295 p = xdr_reserve_space(xdr, 4);
2296 if (!p)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002297 goto out_resource;
J. Bruce Fieldsc373b0a2014-03-22 17:09:18 -04002298 *p++ = cpu_to_be32(acl->naces);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002299
J. Bruce Fields28e05dd2007-02-16 01:28:30 -08002300 for (ace = acl->aces; ace < acl->aces + acl->naces; ace++) {
J. Bruce Fieldsddd1ea52013-08-27 21:32:25 -04002301 p = xdr_reserve_space(xdr, 4*3);
2302 if (!p)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002303 goto out_resource;
J. Bruce Fieldsc373b0a2014-03-22 17:09:18 -04002304 *p++ = cpu_to_be32(ace->type);
2305 *p++ = cpu_to_be32(ace->flag);
2306 *p++ = cpu_to_be32(ace->access_mask &
2307 NFS4_ACE_MASK_ALL);
J. Bruce Fieldsddd1ea52013-08-27 21:32:25 -04002308 status = nfsd4_encode_aclname(xdr, rqstp, ace);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002309 if (status)
2310 goto out;
2311 }
2312 }
2313out_acl:
2314 if (bmval0 & FATTR4_WORD0_ACLSUPPORT) {
J. Bruce Fieldsddd1ea52013-08-27 21:32:25 -04002315 p = xdr_reserve_space(xdr, 4);
2316 if (!p)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002317 goto out_resource;
J. Bruce Fieldsc373b0a2014-03-22 17:09:18 -04002318 *p++ = cpu_to_be32(aclsupport ?
Linus Torvalds1da177e2005-04-16 15:20:36 -07002319 ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL : 0);
2320 }
2321 if (bmval0 & FATTR4_WORD0_CANSETTIME) {
J. Bruce Fieldsddd1ea52013-08-27 21:32:25 -04002322 p = xdr_reserve_space(xdr, 4);
2323 if (!p)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002324 goto out_resource;
J. Bruce Fieldsc373b0a2014-03-22 17:09:18 -04002325 *p++ = cpu_to_be32(1);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002326 }
2327 if (bmval0 & FATTR4_WORD0_CASE_INSENSITIVE) {
J. Bruce Fieldsddd1ea52013-08-27 21:32:25 -04002328 p = xdr_reserve_space(xdr, 4);
2329 if (!p)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002330 goto out_resource;
J. Bruce Fieldsc373b0a2014-03-22 17:09:18 -04002331 *p++ = cpu_to_be32(0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002332 }
2333 if (bmval0 & FATTR4_WORD0_CASE_PRESERVING) {
J. Bruce Fieldsddd1ea52013-08-27 21:32:25 -04002334 p = xdr_reserve_space(xdr, 4);
2335 if (!p)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002336 goto out_resource;
J. Bruce Fieldsc373b0a2014-03-22 17:09:18 -04002337 *p++ = cpu_to_be32(1);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002338 }
2339 if (bmval0 & FATTR4_WORD0_CHOWN_RESTRICTED) {
J. Bruce Fieldsddd1ea52013-08-27 21:32:25 -04002340 p = xdr_reserve_space(xdr, 4);
2341 if (!p)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002342 goto out_resource;
J. Bruce Fieldsc373b0a2014-03-22 17:09:18 -04002343 *p++ = cpu_to_be32(1);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002344 }
2345 if (bmval0 & FATTR4_WORD0_FILEHANDLE) {
J. Bruce Fieldsddd1ea52013-08-27 21:32:25 -04002346 p = xdr_reserve_space(xdr, fhp->fh_handle.fh_size + 4);
2347 if (!p)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002348 goto out_resource;
J. Bruce Fields0c0c2672014-03-22 18:43:16 -04002349 p = xdr_encode_opaque(p, &fhp->fh_handle.fh_base,
2350 fhp->fh_handle.fh_size);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002351 }
2352 if (bmval0 & FATTR4_WORD0_FILEID) {
J. Bruce Fieldsddd1ea52013-08-27 21:32:25 -04002353 p = xdr_reserve_space(xdr, 8);
2354 if (!p)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002355 goto out_resource;
J. Bruce Fieldsb64c7f32014-03-22 17:11:35 -04002356 p = xdr_encode_hyper(p, stat.ino);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002357 }
2358 if (bmval0 & FATTR4_WORD0_FILES_AVAIL) {
J. Bruce Fieldsddd1ea52013-08-27 21:32:25 -04002359 p = xdr_reserve_space(xdr, 8);
2360 if (!p)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002361 goto out_resource;
J. Bruce Fieldsb64c7f32014-03-22 17:11:35 -04002362 p = xdr_encode_hyper(p, (u64) statfs.f_ffree);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002363 }
2364 if (bmval0 & FATTR4_WORD0_FILES_FREE) {
J. Bruce Fieldsddd1ea52013-08-27 21:32:25 -04002365 p = xdr_reserve_space(xdr, 8);
2366 if (!p)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002367 goto out_resource;
J. Bruce Fieldsb64c7f32014-03-22 17:11:35 -04002368 p = xdr_encode_hyper(p, (u64) statfs.f_ffree);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002369 }
2370 if (bmval0 & FATTR4_WORD0_FILES_TOTAL) {
J. Bruce Fieldsddd1ea52013-08-27 21:32:25 -04002371 p = xdr_reserve_space(xdr, 8);
2372 if (!p)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002373 goto out_resource;
J. Bruce Fieldsb64c7f32014-03-22 17:11:35 -04002374 p = xdr_encode_hyper(p, (u64) statfs.f_files);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002375 }
J.Bruce Fields81c3f412006-10-04 02:16:19 -07002376 if (bmval0 & FATTR4_WORD0_FS_LOCATIONS) {
J. Bruce Fieldsddd1ea52013-08-27 21:32:25 -04002377 status = nfsd4_encode_fs_locations(xdr, rqstp, exp);
J.Bruce Fields81c3f412006-10-04 02:16:19 -07002378 if (status)
2379 goto out;
2380 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002381 if (bmval0 & FATTR4_WORD0_HOMOGENEOUS) {
J. Bruce Fieldsddd1ea52013-08-27 21:32:25 -04002382 p = xdr_reserve_space(xdr, 4);
2383 if (!p)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002384 goto out_resource;
J. Bruce Fieldsc373b0a2014-03-22 17:09:18 -04002385 *p++ = cpu_to_be32(1);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002386 }
2387 if (bmval0 & FATTR4_WORD0_MAXFILESIZE) {
J. Bruce Fieldsddd1ea52013-08-27 21:32:25 -04002388 p = xdr_reserve_space(xdr, 8);
2389 if (!p)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002390 goto out_resource;
J. Bruce Fieldsb64c7f32014-03-22 17:11:35 -04002391 p = xdr_encode_hyper(p, exp->ex_path.mnt->mnt_sb->s_maxbytes);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002392 }
2393 if (bmval0 & FATTR4_WORD0_MAXLINK) {
J. Bruce Fieldsddd1ea52013-08-27 21:32:25 -04002394 p = xdr_reserve_space(xdr, 4);
2395 if (!p)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002396 goto out_resource;
J. Bruce Fieldsc373b0a2014-03-22 17:09:18 -04002397 *p++ = cpu_to_be32(255);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002398 }
2399 if (bmval0 & FATTR4_WORD0_MAXNAME) {
J. Bruce Fieldsddd1ea52013-08-27 21:32:25 -04002400 p = xdr_reserve_space(xdr, 4);
2401 if (!p)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002402 goto out_resource;
J. Bruce Fieldsc373b0a2014-03-22 17:09:18 -04002403 *p++ = cpu_to_be32(statfs.f_namelen);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002404 }
2405 if (bmval0 & FATTR4_WORD0_MAXREAD) {
J. Bruce Fieldsddd1ea52013-08-27 21:32:25 -04002406 p = xdr_reserve_space(xdr, 8);
2407 if (!p)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002408 goto out_resource;
J. Bruce Fieldsb64c7f32014-03-22 17:11:35 -04002409 p = xdr_encode_hyper(p, (u64) svc_max_payload(rqstp));
Linus Torvalds1da177e2005-04-16 15:20:36 -07002410 }
2411 if (bmval0 & FATTR4_WORD0_MAXWRITE) {
J. Bruce Fieldsddd1ea52013-08-27 21:32:25 -04002412 p = xdr_reserve_space(xdr, 8);
2413 if (!p)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002414 goto out_resource;
J. Bruce Fieldsb64c7f32014-03-22 17:11:35 -04002415 p = xdr_encode_hyper(p, (u64) svc_max_payload(rqstp));
Linus Torvalds1da177e2005-04-16 15:20:36 -07002416 }
2417 if (bmval1 & FATTR4_WORD1_MODE) {
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 Fieldsc373b0a2014-03-22 17:09:18 -04002421 *p++ = cpu_to_be32(stat.mode & S_IALLUGO);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002422 }
2423 if (bmval1 & FATTR4_WORD1_NO_TRUNC) {
J. Bruce Fieldsddd1ea52013-08-27 21:32:25 -04002424 p = xdr_reserve_space(xdr, 4);
2425 if (!p)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002426 goto out_resource;
J. Bruce Fieldsc373b0a2014-03-22 17:09:18 -04002427 *p++ = cpu_to_be32(1);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002428 }
2429 if (bmval1 & FATTR4_WORD1_NUMLINKS) {
J. Bruce Fieldsddd1ea52013-08-27 21:32:25 -04002430 p = xdr_reserve_space(xdr, 4);
2431 if (!p)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002432 goto out_resource;
J. Bruce Fieldsc373b0a2014-03-22 17:09:18 -04002433 *p++ = cpu_to_be32(stat.nlink);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002434 }
2435 if (bmval1 & FATTR4_WORD1_OWNER) {
J. Bruce Fieldsddd1ea52013-08-27 21:32:25 -04002436 status = nfsd4_encode_user(xdr, rqstp, stat.uid);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002437 if (status)
2438 goto out;
2439 }
2440 if (bmval1 & FATTR4_WORD1_OWNER_GROUP) {
J. Bruce Fieldsddd1ea52013-08-27 21:32:25 -04002441 status = nfsd4_encode_group(xdr, rqstp, stat.gid);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002442 if (status)
2443 goto out;
2444 }
2445 if (bmval1 & FATTR4_WORD1_RAWDEV) {
J. Bruce Fieldsddd1ea52013-08-27 21:32:25 -04002446 p = xdr_reserve_space(xdr, 8);
2447 if (!p)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002448 goto out_resource;
J. Bruce Fieldsc373b0a2014-03-22 17:09:18 -04002449 *p++ = cpu_to_be32((u32) MAJOR(stat.rdev));
2450 *p++ = cpu_to_be32((u32) MINOR(stat.rdev));
Linus Torvalds1da177e2005-04-16 15:20:36 -07002451 }
2452 if (bmval1 & FATTR4_WORD1_SPACE_AVAIL) {
J. Bruce Fieldsddd1ea52013-08-27 21:32:25 -04002453 p = xdr_reserve_space(xdr, 8);
2454 if (!p)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002455 goto out_resource;
2456 dummy64 = (u64)statfs.f_bavail * (u64)statfs.f_bsize;
J. Bruce Fieldsb64c7f32014-03-22 17:11:35 -04002457 p = xdr_encode_hyper(p, dummy64);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002458 }
2459 if (bmval1 & FATTR4_WORD1_SPACE_FREE) {
J. Bruce Fieldsddd1ea52013-08-27 21:32:25 -04002460 p = xdr_reserve_space(xdr, 8);
2461 if (!p)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002462 goto out_resource;
2463 dummy64 = (u64)statfs.f_bfree * (u64)statfs.f_bsize;
J. Bruce Fieldsb64c7f32014-03-22 17:11:35 -04002464 p = xdr_encode_hyper(p, dummy64);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002465 }
2466 if (bmval1 & FATTR4_WORD1_SPACE_TOTAL) {
J. Bruce Fieldsddd1ea52013-08-27 21:32:25 -04002467 p = xdr_reserve_space(xdr, 8);
2468 if (!p)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002469 goto out_resource;
2470 dummy64 = (u64)statfs.f_blocks * (u64)statfs.f_bsize;
J. Bruce Fieldsb64c7f32014-03-22 17:11:35 -04002471 p = xdr_encode_hyper(p, dummy64);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002472 }
2473 if (bmval1 & FATTR4_WORD1_SPACE_USED) {
J. Bruce Fieldsddd1ea52013-08-27 21:32:25 -04002474 p = xdr_reserve_space(xdr, 8);
2475 if (!p)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002476 goto out_resource;
2477 dummy64 = (u64)stat.blocks << 9;
J. Bruce Fieldsb64c7f32014-03-22 17:11:35 -04002478 p = xdr_encode_hyper(p, dummy64);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002479 }
2480 if (bmval1 & FATTR4_WORD1_TIME_ACCESS) {
J. Bruce Fieldsddd1ea52013-08-27 21:32:25 -04002481 p = xdr_reserve_space(xdr, 12);
2482 if (!p)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002483 goto out_resource;
J. Bruce Fieldsb64c7f32014-03-22 17:11:35 -04002484 p = xdr_encode_hyper(p, (s64)stat.atime.tv_sec);
J. Bruce Fieldsc373b0a2014-03-22 17:09:18 -04002485 *p++ = cpu_to_be32(stat.atime.tv_nsec);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002486 }
2487 if (bmval1 & FATTR4_WORD1_TIME_DELTA) {
J. Bruce Fieldsddd1ea52013-08-27 21:32:25 -04002488 p = xdr_reserve_space(xdr, 12);
2489 if (!p)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002490 goto out_resource;
J. Bruce Fieldsc373b0a2014-03-22 17:09:18 -04002491 *p++ = cpu_to_be32(0);
2492 *p++ = cpu_to_be32(1);
2493 *p++ = cpu_to_be32(0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002494 }
2495 if (bmval1 & FATTR4_WORD1_TIME_METADATA) {
J. Bruce Fieldsddd1ea52013-08-27 21:32:25 -04002496 p = xdr_reserve_space(xdr, 12);
2497 if (!p)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002498 goto out_resource;
J. Bruce Fieldsb64c7f32014-03-22 17:11:35 -04002499 p = xdr_encode_hyper(p, (s64)stat.ctime.tv_sec);
J. Bruce Fieldsc373b0a2014-03-22 17:09:18 -04002500 *p++ = cpu_to_be32(stat.ctime.tv_nsec);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002501 }
2502 if (bmval1 & FATTR4_WORD1_TIME_MODIFY) {
J. Bruce Fieldsddd1ea52013-08-27 21:32:25 -04002503 p = xdr_reserve_space(xdr, 12);
2504 if (!p)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002505 goto out_resource;
J. Bruce Fieldsb64c7f32014-03-22 17:11:35 -04002506 p = xdr_encode_hyper(p, (s64)stat.mtime.tv_sec);
J. Bruce Fieldsc373b0a2014-03-22 17:09:18 -04002507 *p++ = cpu_to_be32(stat.mtime.tv_nsec);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002508 }
2509 if (bmval1 & FATTR4_WORD1_MOUNTED_ON_FILEID) {
J. Bruce Fieldsddd1ea52013-08-27 21:32:25 -04002510 p = xdr_reserve_space(xdr, 8);
2511 if (!p)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002512 goto out_resource;
Frank Filz406a7ea2007-11-27 11:34:05 -08002513 /*
2514 * Get parent's attributes if not ignoring crossmount
2515 * and this is the root of a cross-mounted filesystem.
2516 */
2517 if (ignore_crossmnt == 0 &&
J. Bruce Fieldsae7095a2012-10-01 17:50:56 -04002518 dentry == exp->ex_path.mnt->mnt_root)
2519 get_parent_attributes(exp, &stat);
J. Bruce Fieldsb64c7f32014-03-22 17:11:35 -04002520 p = xdr_encode_hyper(p, stat.ino);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002521 }
David Quigley18032ca2013-05-02 13:19:10 -04002522 if (bmval2 & FATTR4_WORD2_SECURITY_LABEL) {
J. Bruce Fieldsddd1ea52013-08-27 21:32:25 -04002523 status = nfsd4_encode_security_label(xdr, rqstp, context,
2524 contextlen);
David Quigley18032ca2013-05-02 13:19:10 -04002525 if (status)
2526 goto out;
2527 }
Benny Halevy8c18f202009-04-03 08:29:14 +03002528 if (bmval2 & FATTR4_WORD2_SUPPATTR_EXCLCREAT) {
J. Bruce Fieldsddd1ea52013-08-27 21:32:25 -04002529 p = xdr_reserve_space(xdr, 16);
2530 if (!p)
J. Bruce Fieldsde3997a2014-01-28 16:05:15 -05002531 goto out_resource;
J. Bruce Fieldsc373b0a2014-03-22 17:09:18 -04002532 *p++ = cpu_to_be32(3);
2533 *p++ = cpu_to_be32(NFSD_SUPPATTR_EXCLCREAT_WORD0);
2534 *p++ = cpu_to_be32(NFSD_SUPPATTR_EXCLCREAT_WORD1);
2535 *p++ = cpu_to_be32(NFSD_SUPPATTR_EXCLCREAT_WORD2);
Benny Halevy8c18f202009-04-03 08:29:14 +03002536 }
Andy Adamson7e705702009-04-03 08:29:11 +03002537
J. Bruce Fields082d4bd2013-08-29 15:42:52 -04002538 attrlen = htonl(xdr->buf->len - attrlen_offset - 4);
2539 write_bytes_to_xdr_buf(xdr->buf, attrlen_offset, &attrlen, 4);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002540 status = nfs_ok;
2541
2542out:
J. Bruce Fieldsba4e55b2013-05-15 10:27:52 -04002543#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
David Quigley18032ca2013-05-02 13:19:10 -04002544 if (context)
2545 security_release_secctx(context, contextlen);
J. Bruce Fieldsba4e55b2013-05-15 10:27:52 -04002546#endif /* CONFIG_NFSD_V4_SECURITY_LABEL */
J. Bruce Fields28e05dd2007-02-16 01:28:30 -08002547 kfree(acl);
Yan, Zheng18df11d02014-03-10 12:52:07 +08002548 if (tempfh) {
J. Bruce Fieldsd50e6132014-01-15 12:21:12 -05002549 fh_put(tempfh);
Yan, Zheng18df11d02014-03-10 12:52:07 +08002550 kfree(tempfh);
2551 }
J. Bruce Fields1fcea5b2014-02-26 20:17:02 -05002552 if (status)
2553 xdr_truncate_encode(xdr, starting_len);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002554 return status;
2555out_nfserr:
Al Virob8dd7b92006-10-19 23:29:01 -07002556 status = nfserrno(err);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002557 goto out;
2558out_resource:
Linus Torvalds1da177e2005-04-16 15:20:36 -07002559 status = nfserr_resource;
2560 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002561}
2562
J. Bruce Fields2825a7f2013-08-26 16:04:46 -04002563static void svcxdr_init_encode_from_buffer(struct xdr_stream *xdr,
2564 struct xdr_buf *buf, __be32 *p, int bytes)
2565{
2566 xdr->scratch.iov_len = 0;
2567 memset(buf, 0, sizeof(struct xdr_buf));
2568 buf->head[0].iov_base = p;
2569 buf->head[0].iov_len = 0;
2570 buf->len = 0;
2571 xdr->buf = buf;
2572 xdr->iov = buf->head;
2573 xdr->p = p;
2574 xdr->end = (void *)p + bytes;
2575 buf->buflen = bytes;
2576}
2577
J. Bruce Fieldsd5184652013-08-26 16:04:46 -04002578__be32 nfsd4_encode_fattr_to_buf(__be32 **p, int words,
2579 struct svc_fh *fhp, struct svc_export *exp,
2580 struct dentry *dentry, u32 *bmval,
2581 struct svc_rqst *rqstp, int ignore_crossmnt)
2582{
J. Bruce Fields2825a7f2013-08-26 16:04:46 -04002583 struct xdr_buf dummy;
J. Bruce Fieldsd5184652013-08-26 16:04:46 -04002584 struct xdr_stream xdr;
2585 __be32 ret;
2586
J. Bruce Fields2825a7f2013-08-26 16:04:46 -04002587 svcxdr_init_encode_from_buffer(&xdr, &dummy, *p, words << 2);
J. Bruce Fieldsd5184652013-08-26 16:04:46 -04002588 ret = nfsd4_encode_fattr(&xdr, fhp, exp, dentry, bmval, rqstp,
2589 ignore_crossmnt);
2590 *p = xdr.p;
2591 return ret;
2592}
2593
J. Bruce Fieldsc0ce6ec2008-02-11 15:48:47 -05002594static inline int attributes_need_mount(u32 *bmval)
2595{
2596 if (bmval[0] & ~(FATTR4_WORD0_RDATTR_ERROR | FATTR4_WORD0_LEASE_TIME))
2597 return 1;
2598 if (bmval[1] & ~FATTR4_WORD1_MOUNTED_ON_FILEID)
2599 return 1;
2600 return 0;
2601}
2602
Al Virob37ad282006-10-19 23:28:59 -07002603static __be32
J. Bruce Fields561f0ed2014-01-20 16:37:11 -05002604nfsd4_encode_dirent_fattr(struct xdr_stream *xdr, struct nfsd4_readdir *cd,
2605 const char *name, int namlen)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002606{
2607 struct svc_export *exp = cd->rd_fhp->fh_export;
2608 struct dentry *dentry;
Al Virob37ad282006-10-19 23:28:59 -07002609 __be32 nfserr;
Frank Filz406a7ea2007-11-27 11:34:05 -08002610 int ignore_crossmnt = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002611
2612 dentry = lookup_one_len(name, cd->rd_fhp->fh_dentry, namlen);
2613 if (IS_ERR(dentry))
2614 return nfserrno(PTR_ERR(dentry));
J. Bruce Fieldsb2c0cea2009-05-05 19:04:29 -04002615 if (!dentry->d_inode) {
2616 /*
2617 * nfsd_buffered_readdir drops the i_mutex between
2618 * readdir and calling this callback, leaving a window
2619 * where this directory entry could have gone away.
2620 */
2621 dput(dentry);
2622 return nfserr_noent;
2623 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002624
2625 exp_get(exp);
Frank Filz406a7ea2007-11-27 11:34:05 -08002626 /*
2627 * In the case of a mountpoint, the client may be asking for
2628 * attributes that are only properties of the underlying filesystem
2629 * as opposed to the cross-mounted file system. In such a case,
2630 * we will not follow the cross mount and will fill the attribtutes
2631 * directly from the mountpoint dentry.
2632 */
J. Bruce Fields3227fa42009-10-25 21:43:01 -04002633 if (nfsd_mountpoint(dentry, exp)) {
J.Bruce Fields021d3a72006-12-13 00:35:24 -08002634 int err;
2635
J. Bruce Fields3227fa42009-10-25 21:43:01 -04002636 if (!(exp->ex_flags & NFSEXP_V4ROOT)
2637 && !attributes_need_mount(cd->rd_bmval)) {
2638 ignore_crossmnt = 1;
2639 goto out_encode;
2640 }
Andy Adamsondcb488a32007-07-17 04:04:51 -07002641 /*
2642 * Why the heck aren't we just using nfsd_lookup??
2643 * Different "."/".." handling? Something else?
2644 * At least, add a comment here to explain....
2645 */
J.Bruce Fields021d3a72006-12-13 00:35:24 -08002646 err = nfsd_cross_mnt(cd->rd_rqstp, &dentry, &exp);
2647 if (err) {
2648 nfserr = nfserrno(err);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002649 goto out_put;
2650 }
Andy Adamsondcb488a32007-07-17 04:04:51 -07002651 nfserr = check_nfsd_access(exp, cd->rd_rqstp);
2652 if (nfserr)
2653 goto out_put;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002654
2655 }
J. Bruce Fields3227fa42009-10-25 21:43:01 -04002656out_encode:
J. Bruce Fields561f0ed2014-01-20 16:37:11 -05002657 nfserr = nfsd4_encode_fattr(xdr, NULL, exp, dentry, cd->rd_bmval,
Frank Filz406a7ea2007-11-27 11:34:05 -08002658 cd->rd_rqstp, ignore_crossmnt);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002659out_put:
2660 dput(dentry);
2661 exp_put(exp);
2662 return nfserr;
2663}
2664
Al Viro2ebbc012006-10-19 23:28:58 -07002665static __be32 *
J. Bruce Fields561f0ed2014-01-20 16:37:11 -05002666nfsd4_encode_rdattr_error(struct xdr_stream *xdr, __be32 nfserr)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002667{
J. Bruce Fields561f0ed2014-01-20 16:37:11 -05002668 __be32 *p;
2669
Kinglong Meec3a45612014-07-06 11:34:43 +08002670 p = xdr_reserve_space(xdr, 20);
J. Bruce Fields561f0ed2014-01-20 16:37:11 -05002671 if (!p)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002672 return NULL;
2673 *p++ = htonl(2);
2674 *p++ = htonl(FATTR4_WORD0_RDATTR_ERROR); /* bmval0 */
2675 *p++ = htonl(0); /* bmval1 */
2676
J. Bruce Fields87915c62013-01-16 17:33:28 -05002677 *p++ = htonl(4); /* attribute length */
Linus Torvalds1da177e2005-04-16 15:20:36 -07002678 *p++ = nfserr; /* no htonl */
Linus Torvalds1da177e2005-04-16 15:20:36 -07002679 return p;
2680}
2681
2682static int
NeilBrowna0ad13e2007-01-26 00:57:10 -08002683nfsd4_encode_dirent(void *ccdv, const char *name, int namlen,
2684 loff_t offset, u64 ino, unsigned int d_type)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002685{
NeilBrowna0ad13e2007-01-26 00:57:10 -08002686 struct readdir_cd *ccd = ccdv;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002687 struct nfsd4_readdir *cd = container_of(ccd, struct nfsd4_readdir, common);
J. Bruce Fields561f0ed2014-01-20 16:37:11 -05002688 struct xdr_stream *xdr = cd->xdr;
2689 int start_offset = xdr->buf->len;
2690 int cookie_offset;
J. Bruce Fieldsaee37762014-08-20 14:49:50 -04002691 u32 name_and_cookie;
J. Bruce Fields561f0ed2014-01-20 16:37:11 -05002692 int entry_bytes;
Al Virob37ad282006-10-19 23:28:59 -07002693 __be32 nfserr = nfserr_toosmall;
J. Bruce Fields561f0ed2014-01-20 16:37:11 -05002694 __be64 wire_offset;
2695 __be32 *p;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002696
2697 /* In nfsv4, "." and ".." never make it onto the wire.. */
2698 if (name && isdotent(name, namlen)) {
2699 cd->common.err = nfs_ok;
2700 return 0;
2701 }
2702
J. Bruce Fields561f0ed2014-01-20 16:37:11 -05002703 if (cd->cookie_offset) {
2704 wire_offset = cpu_to_be64(offset);
2705 write_bytes_to_xdr_buf(xdr->buf, cd->cookie_offset,
2706 &wire_offset, 8);
2707 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002708
J. Bruce Fields561f0ed2014-01-20 16:37:11 -05002709 p = xdr_reserve_space(xdr, 4);
2710 if (!p)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002711 goto fail;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002712 *p++ = xdr_one; /* mark entry present */
J. Bruce Fields561f0ed2014-01-20 16:37:11 -05002713 cookie_offset = xdr->buf->len;
2714 p = xdr_reserve_space(xdr, 3*4 + namlen);
2715 if (!p)
2716 goto fail;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002717 p = xdr_encode_hyper(p, NFS_OFFSET_MAX); /* offset of next entry */
2718 p = xdr_encode_array(p, name, namlen); /* name length & name */
2719
J. Bruce Fields561f0ed2014-01-20 16:37:11 -05002720 nfserr = nfsd4_encode_dirent_fattr(xdr, cd, name, namlen);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002721 switch (nfserr) {
2722 case nfs_ok:
Linus Torvalds1da177e2005-04-16 15:20:36 -07002723 break;
2724 case nfserr_resource:
2725 nfserr = nfserr_toosmall;
2726 goto fail;
J. Bruce Fieldsb2c0cea2009-05-05 19:04:29 -04002727 case nfserr_noent:
Kinglong Meef41c5ad2014-06-13 17:32:42 +08002728 xdr_truncate_encode(xdr, start_offset);
J. Bruce Fieldsb2c0cea2009-05-05 19:04:29 -04002729 goto skip_entry;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002730 default:
2731 /*
2732 * If the client requested the RDATTR_ERROR attribute,
2733 * we stuff the error code into this attribute
2734 * and continue. If this attribute was not requested,
2735 * then in accordance with the spec, we fail the
2736 * entire READDIR operation(!)
2737 */
2738 if (!(cd->rd_bmval[0] & FATTR4_WORD0_RDATTR_ERROR))
2739 goto fail;
J. Bruce Fields561f0ed2014-01-20 16:37:11 -05002740 p = nfsd4_encode_rdattr_error(xdr, nfserr);
Fred Isaman34081ef2006-01-18 17:43:40 -08002741 if (p == NULL) {
2742 nfserr = nfserr_toosmall;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002743 goto fail;
Fred Isaman34081ef2006-01-18 17:43:40 -08002744 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002745 }
J. Bruce Fields561f0ed2014-01-20 16:37:11 -05002746 nfserr = nfserr_toosmall;
2747 entry_bytes = xdr->buf->len - start_offset;
2748 if (entry_bytes > cd->rd_maxcount)
2749 goto fail;
2750 cd->rd_maxcount -= entry_bytes;
J. Bruce Fields3b299702014-03-20 21:20:26 -04002751 if (!cd->rd_dircount)
2752 goto fail;
J. Bruce Fieldsaee37762014-08-20 14:49:50 -04002753 /*
2754 * RFC 3530 14.2.24 describes rd_dircount as only a "hint", so
2755 * let's always let through the first entry, at least:
2756 */
2757 name_and_cookie = 4 * XDR_QUADLEN(namlen) + 8;
2758 if (name_and_cookie > cd->rd_dircount && cd->cookie_offset)
2759 goto fail;
2760 cd->rd_dircount -= min(cd->rd_dircount, name_and_cookie);
J. Bruce Fields561f0ed2014-01-20 16:37:11 -05002761 cd->cookie_offset = cookie_offset;
J. Bruce Fieldsb2c0cea2009-05-05 19:04:29 -04002762skip_entry:
Linus Torvalds1da177e2005-04-16 15:20:36 -07002763 cd->common.err = nfs_ok;
2764 return 0;
2765fail:
J. Bruce Fields561f0ed2014-01-20 16:37:11 -05002766 xdr_truncate_encode(xdr, start_offset);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002767 cd->common.err = nfserr;
2768 return -EINVAL;
2769}
2770
J. Bruce Fieldsd0a381d2014-01-30 17:18:38 -05002771static __be32
2772nfsd4_encode_stateid(struct xdr_stream *xdr, stateid_t *sid)
Benny Halevye2f282b2008-08-12 20:45:07 +03002773{
J. Bruce Fieldsbc749ca2009-04-07 16:55:27 -07002774 __be32 *p;
Benny Halevye2f282b2008-08-12 20:45:07 +03002775
J. Bruce Fieldsd0a381d2014-01-30 17:18:38 -05002776 p = xdr_reserve_space(xdr, sizeof(stateid_t));
2777 if (!p)
2778 return nfserr_resource;
J. Bruce Fieldsc373b0a2014-03-22 17:09:18 -04002779 *p++ = cpu_to_be32(sid->si_generation);
J. Bruce Fields0c0c2672014-03-22 18:43:16 -04002780 p = xdr_encode_opaque_fixed(p, &sid->si_opaque,
2781 sizeof(stateid_opaque_t));
J. Bruce Fieldsd0a381d2014-01-30 17:18:38 -05002782 return 0;
Benny Halevye2f282b2008-08-12 20:45:07 +03002783}
2784
Benny Halevy695e12f2008-07-04 14:38:33 +03002785static __be32
Al Virob37ad282006-10-19 23:28:59 -07002786nfsd4_encode_access(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_access *access)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002787{
J. Bruce Fieldsd0a381d2014-01-30 17:18:38 -05002788 struct xdr_stream *xdr = &resp->xdr;
J. Bruce Fieldsbc749ca2009-04-07 16:55:27 -07002789 __be32 *p;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002790
2791 if (!nfserr) {
J. Bruce Fieldsd0a381d2014-01-30 17:18:38 -05002792 p = xdr_reserve_space(xdr, 8);
2793 if (!p)
2794 return nfserr_resource;
J. Bruce Fieldsc373b0a2014-03-22 17:09:18 -04002795 *p++ = cpu_to_be32(access->ac_supported);
2796 *p++ = cpu_to_be32(access->ac_resp_access);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002797 }
Benny Halevy695e12f2008-07-04 14:38:33 +03002798 return nfserr;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002799}
2800
J. Bruce Fields1d1bc8f2010-10-04 23:12:59 -04002801static __be32 nfsd4_encode_bind_conn_to_session(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_bind_conn_to_session *bcts)
2802{
J. Bruce Fieldsd0a381d2014-01-30 17:18:38 -05002803 struct xdr_stream *xdr = &resp->xdr;
J. Bruce Fields1d1bc8f2010-10-04 23:12:59 -04002804 __be32 *p;
2805
2806 if (!nfserr) {
J. Bruce Fieldsd0a381d2014-01-30 17:18:38 -05002807 p = xdr_reserve_space(xdr, NFS4_MAX_SESSIONID_LEN + 8);
2808 if (!p)
2809 return nfserr_resource;
J. Bruce Fields0c0c2672014-03-22 18:43:16 -04002810 p = xdr_encode_opaque_fixed(p, bcts->sessionid.data,
2811 NFS4_MAX_SESSIONID_LEN);
J. Bruce Fieldsc373b0a2014-03-22 17:09:18 -04002812 *p++ = cpu_to_be32(bcts->dir);
J. Bruce Fields6e67b5d2012-09-13 09:49:43 -04002813 /* Sorry, we do not yet support RDMA over 4.1: */
J. Bruce Fieldsc373b0a2014-03-22 17:09:18 -04002814 *p++ = cpu_to_be32(0);
J. Bruce Fields1d1bc8f2010-10-04 23:12:59 -04002815 }
2816 return nfserr;
2817}
2818
Benny Halevy695e12f2008-07-04 14:38:33 +03002819static __be32
Al Virob37ad282006-10-19 23:28:59 -07002820nfsd4_encode_close(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_close *close)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002821{
J. Bruce Fieldsd0a381d2014-01-30 17:18:38 -05002822 struct xdr_stream *xdr = &resp->xdr;
2823
Benny Halevye2f282b2008-08-12 20:45:07 +03002824 if (!nfserr)
J. Bruce Fieldsd0a381d2014-01-30 17:18:38 -05002825 nfserr = nfsd4_encode_stateid(xdr, &close->cl_stateid);
Benny Halevye2f282b2008-08-12 20:45:07 +03002826
Benny Halevy695e12f2008-07-04 14:38:33 +03002827 return nfserr;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002828}
2829
2830
Benny Halevy695e12f2008-07-04 14:38:33 +03002831static __be32
Al Virob37ad282006-10-19 23:28:59 -07002832nfsd4_encode_commit(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_commit *commit)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002833{
J. Bruce Fieldsd0a381d2014-01-30 17:18:38 -05002834 struct xdr_stream *xdr = &resp->xdr;
J. Bruce Fieldsbc749ca2009-04-07 16:55:27 -07002835 __be32 *p;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002836
2837 if (!nfserr) {
J. Bruce Fieldsd0a381d2014-01-30 17:18:38 -05002838 p = xdr_reserve_space(xdr, NFS4_VERIFIER_SIZE);
2839 if (!p)
2840 return nfserr_resource;
J. Bruce Fields0c0c2672014-03-22 18:43:16 -04002841 p = xdr_encode_opaque_fixed(p, commit->co_verf.data,
2842 NFS4_VERIFIER_SIZE);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002843 }
Benny Halevy695e12f2008-07-04 14:38:33 +03002844 return nfserr;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002845}
2846
Benny Halevy695e12f2008-07-04 14:38:33 +03002847static __be32
Al Virob37ad282006-10-19 23:28:59 -07002848nfsd4_encode_create(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_create *create)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002849{
J. Bruce Fieldsd0a381d2014-01-30 17:18:38 -05002850 struct xdr_stream *xdr = &resp->xdr;
J. Bruce Fieldsbc749ca2009-04-07 16:55:27 -07002851 __be32 *p;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002852
2853 if (!nfserr) {
J. Bruce Fieldsd0a381d2014-01-30 17:18:38 -05002854 p = xdr_reserve_space(xdr, 32);
2855 if (!p)
2856 return nfserr_resource;
J. Bruce Fieldsd05d5742014-03-22 18:48:39 -04002857 p = encode_cinfo(p, &create->cr_cinfo);
J. Bruce Fieldsc373b0a2014-03-22 17:09:18 -04002858 *p++ = cpu_to_be32(2);
2859 *p++ = cpu_to_be32(create->cr_bmval[0]);
2860 *p++ = cpu_to_be32(create->cr_bmval[1]);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002861 }
Benny Halevy695e12f2008-07-04 14:38:33 +03002862 return nfserr;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002863}
2864
Al Virob37ad282006-10-19 23:28:59 -07002865static __be32
2866nfsd4_encode_getattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_getattr *getattr)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002867{
2868 struct svc_fh *fhp = getattr->ga_fhp;
J. Bruce Fieldsd5184652013-08-26 16:04:46 -04002869 struct xdr_stream *xdr = &resp->xdr;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002870
2871 if (nfserr)
2872 return nfserr;
2873
J. Bruce Fieldsd5184652013-08-26 16:04:46 -04002874 nfserr = nfsd4_encode_fattr(xdr, fhp, fhp->fh_export, fhp->fh_dentry,
2875 getattr->ga_bmval,
Frank Filz406a7ea2007-11-27 11:34:05 -08002876 resp->rqstp, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002877 return nfserr;
2878}
2879
Benny Halevy695e12f2008-07-04 14:38:33 +03002880static __be32
2881nfsd4_encode_getfh(struct nfsd4_compoundres *resp, __be32 nfserr, struct svc_fh **fhpp)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002882{
J. Bruce Fieldsd0a381d2014-01-30 17:18:38 -05002883 struct xdr_stream *xdr = &resp->xdr;
Benny Halevy695e12f2008-07-04 14:38:33 +03002884 struct svc_fh *fhp = *fhpp;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002885 unsigned int len;
J. Bruce Fieldsbc749ca2009-04-07 16:55:27 -07002886 __be32 *p;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002887
2888 if (!nfserr) {
2889 len = fhp->fh_handle.fh_size;
J. Bruce Fieldsd0a381d2014-01-30 17:18:38 -05002890 p = xdr_reserve_space(xdr, len + 4);
2891 if (!p)
2892 return nfserr_resource;
J. Bruce Fields0c0c2672014-03-22 18:43:16 -04002893 p = xdr_encode_opaque(p, &fhp->fh_handle.fh_base, len);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002894 }
Benny Halevy695e12f2008-07-04 14:38:33 +03002895 return nfserr;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002896}
2897
2898/*
2899* Including all fields other than the name, a LOCK4denied structure requires
2900* 8(clientid) + 4(namelen) + 8(offset) + 8(length) + 4(type) = 32 bytes.
2901*/
J. Bruce Fieldsd0a381d2014-01-30 17:18:38 -05002902static __be32
2903nfsd4_encode_lock_denied(struct xdr_stream *xdr, struct nfsd4_lock_denied *ld)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002904{
J. Bruce Fields7c13f342011-08-30 22:15:47 -04002905 struct xdr_netobj *conf = &ld->ld_owner;
J. Bruce Fieldsbc749ca2009-04-07 16:55:27 -07002906 __be32 *p;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002907
J. Bruce Fields8c7424c2014-03-10 12:19:10 -04002908again:
J. Bruce Fieldsd0a381d2014-01-30 17:18:38 -05002909 p = xdr_reserve_space(xdr, 32 + XDR_LEN(conf->len));
J. Bruce Fields8c7424c2014-03-10 12:19:10 -04002910 if (!p) {
2911 /*
2912 * Don't fail to return the result just because we can't
2913 * return the conflicting open:
2914 */
2915 if (conf->len) {
Kinglong Meef98bac52014-07-07 22:10:56 +08002916 kfree(conf->data);
J. Bruce Fields8c7424c2014-03-10 12:19:10 -04002917 conf->len = 0;
2918 conf->data = NULL;
2919 goto again;
2920 }
J. Bruce Fieldsd0a381d2014-01-30 17:18:38 -05002921 return nfserr_resource;
J. Bruce Fields8c7424c2014-03-10 12:19:10 -04002922 }
J. Bruce Fieldsb64c7f32014-03-22 17:11:35 -04002923 p = xdr_encode_hyper(p, ld->ld_start);
2924 p = xdr_encode_hyper(p, ld->ld_length);
J. Bruce Fieldsc373b0a2014-03-22 17:09:18 -04002925 *p++ = cpu_to_be32(ld->ld_type);
J. Bruce Fields7c13f342011-08-30 22:15:47 -04002926 if (conf->len) {
J. Bruce Fields0c0c2672014-03-22 18:43:16 -04002927 p = xdr_encode_opaque_fixed(p, &ld->ld_clientid, 8);
2928 p = xdr_encode_opaque(p, conf->data, conf->len);
Kinglong Meef98bac52014-07-07 22:10:56 +08002929 kfree(conf->data);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002930 } else { /* non - nfsv4 lock in conflict, no clientid nor owner */
J. Bruce Fieldsb64c7f32014-03-22 17:11:35 -04002931 p = xdr_encode_hyper(p, (u64)0); /* clientid */
J. Bruce Fieldsc373b0a2014-03-22 17:09:18 -04002932 *p++ = cpu_to_be32(0); /* length of owner name */
Linus Torvalds1da177e2005-04-16 15:20:36 -07002933 }
J. Bruce Fieldsd0a381d2014-01-30 17:18:38 -05002934 return nfserr_denied;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002935}
2936
Benny Halevy695e12f2008-07-04 14:38:33 +03002937static __be32
Al Virob37ad282006-10-19 23:28:59 -07002938nfsd4_encode_lock(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lock *lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002939{
J. Bruce Fieldsd0a381d2014-01-30 17:18:38 -05002940 struct xdr_stream *xdr = &resp->xdr;
2941
Benny Halevye2f282b2008-08-12 20:45:07 +03002942 if (!nfserr)
J. Bruce Fieldsd0a381d2014-01-30 17:18:38 -05002943 nfserr = nfsd4_encode_stateid(xdr, &lock->lk_resp_stateid);
Benny Halevye2f282b2008-08-12 20:45:07 +03002944 else if (nfserr == nfserr_denied)
J. Bruce Fieldsd0a381d2014-01-30 17:18:38 -05002945 nfserr = nfsd4_encode_lock_denied(xdr, &lock->lk_denied);
Kinglong Meef98bac52014-07-07 22:10:56 +08002946
Benny Halevy695e12f2008-07-04 14:38:33 +03002947 return nfserr;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002948}
2949
Benny Halevy695e12f2008-07-04 14:38:33 +03002950static __be32
Al Virob37ad282006-10-19 23:28:59 -07002951nfsd4_encode_lockt(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lockt *lockt)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002952{
J. Bruce Fieldsd0a381d2014-01-30 17:18:38 -05002953 struct xdr_stream *xdr = &resp->xdr;
2954
Linus Torvalds1da177e2005-04-16 15:20:36 -07002955 if (nfserr == nfserr_denied)
J. Bruce Fieldsd0a381d2014-01-30 17:18:38 -05002956 nfsd4_encode_lock_denied(xdr, &lockt->lt_denied);
Benny Halevy695e12f2008-07-04 14:38:33 +03002957 return nfserr;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002958}
2959
Benny Halevy695e12f2008-07-04 14:38:33 +03002960static __be32
Al Virob37ad282006-10-19 23:28:59 -07002961nfsd4_encode_locku(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_locku *locku)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002962{
J. Bruce Fieldsd0a381d2014-01-30 17:18:38 -05002963 struct xdr_stream *xdr = &resp->xdr;
2964
Benny Halevye2f282b2008-08-12 20:45:07 +03002965 if (!nfserr)
J. Bruce Fieldsd0a381d2014-01-30 17:18:38 -05002966 nfserr = nfsd4_encode_stateid(xdr, &locku->lu_stateid);
Benny Halevye2f282b2008-08-12 20:45:07 +03002967
Benny Halevy695e12f2008-07-04 14:38:33 +03002968 return nfserr;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002969}
2970
2971
Benny Halevy695e12f2008-07-04 14:38:33 +03002972static __be32
Al Virob37ad282006-10-19 23:28:59 -07002973nfsd4_encode_link(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_link *link)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002974{
J. Bruce Fieldsd0a381d2014-01-30 17:18:38 -05002975 struct xdr_stream *xdr = &resp->xdr;
J. Bruce Fieldsbc749ca2009-04-07 16:55:27 -07002976 __be32 *p;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002977
2978 if (!nfserr) {
J. Bruce Fieldsd0a381d2014-01-30 17:18:38 -05002979 p = xdr_reserve_space(xdr, 20);
2980 if (!p)
2981 return nfserr_resource;
J. Bruce Fieldsd05d5742014-03-22 18:48:39 -04002982 p = encode_cinfo(p, &link->li_cinfo);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002983 }
Benny Halevy695e12f2008-07-04 14:38:33 +03002984 return nfserr;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002985}
2986
2987
Benny Halevy695e12f2008-07-04 14:38:33 +03002988static __be32
Al Virob37ad282006-10-19 23:28:59 -07002989nfsd4_encode_open(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open *open)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002990{
J. Bruce Fieldsd0a381d2014-01-30 17:18:38 -05002991 struct xdr_stream *xdr = &resp->xdr;
J. Bruce Fieldsbc749ca2009-04-07 16:55:27 -07002992 __be32 *p;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002993
2994 if (nfserr)
2995 goto out;
2996
J. Bruce Fieldsd0a381d2014-01-30 17:18:38 -05002997 nfserr = nfsd4_encode_stateid(xdr, &open->op_stateid);
2998 if (nfserr)
2999 goto out;
3000 p = xdr_reserve_space(xdr, 40);
3001 if (!p)
3002 return nfserr_resource;
J. Bruce Fieldsd05d5742014-03-22 18:48:39 -04003003 p = encode_cinfo(p, &open->op_cinfo);
J. Bruce Fieldsc373b0a2014-03-22 17:09:18 -04003004 *p++ = cpu_to_be32(open->op_rflags);
3005 *p++ = cpu_to_be32(2);
3006 *p++ = cpu_to_be32(open->op_bmval[0]);
3007 *p++ = cpu_to_be32(open->op_bmval[1]);
3008 *p++ = cpu_to_be32(open->op_delegate_type);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003009
3010 switch (open->op_delegate_type) {
3011 case NFS4_OPEN_DELEGATE_NONE:
3012 break;
3013 case NFS4_OPEN_DELEGATE_READ:
J. Bruce Fieldsd0a381d2014-01-30 17:18:38 -05003014 nfserr = nfsd4_encode_stateid(xdr, &open->op_delegate_stateid);
3015 if (nfserr)
3016 return nfserr;
3017 p = xdr_reserve_space(xdr, 20);
3018 if (!p)
3019 return nfserr_resource;
J. Bruce Fieldsc373b0a2014-03-22 17:09:18 -04003020 *p++ = cpu_to_be32(open->op_recall);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003021
3022 /*
3023 * TODO: ACE's in delegations
3024 */
J. Bruce Fieldsc373b0a2014-03-22 17:09:18 -04003025 *p++ = cpu_to_be32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
3026 *p++ = cpu_to_be32(0);
3027 *p++ = cpu_to_be32(0);
3028 *p++ = cpu_to_be32(0); /* XXX: is NULL principal ok? */
Linus Torvalds1da177e2005-04-16 15:20:36 -07003029 break;
3030 case NFS4_OPEN_DELEGATE_WRITE:
J. Bruce Fieldsd0a381d2014-01-30 17:18:38 -05003031 nfserr = nfsd4_encode_stateid(xdr, &open->op_delegate_stateid);
3032 if (nfserr)
3033 return nfserr;
3034 p = xdr_reserve_space(xdr, 32);
3035 if (!p)
3036 return nfserr_resource;
J. Bruce Fieldsc373b0a2014-03-22 17:09:18 -04003037 *p++ = cpu_to_be32(0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003038
3039 /*
3040 * TODO: space_limit's in delegations
3041 */
J. Bruce Fieldsc373b0a2014-03-22 17:09:18 -04003042 *p++ = cpu_to_be32(NFS4_LIMIT_SIZE);
3043 *p++ = cpu_to_be32(~(u32)0);
3044 *p++ = cpu_to_be32(~(u32)0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003045
3046 /*
3047 * TODO: ACE's in delegations
3048 */
J. Bruce Fieldsc373b0a2014-03-22 17:09:18 -04003049 *p++ = cpu_to_be32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
3050 *p++ = cpu_to_be32(0);
3051 *p++ = cpu_to_be32(0);
3052 *p++ = cpu_to_be32(0); /* XXX: is NULL principal ok? */
Linus Torvalds1da177e2005-04-16 15:20:36 -07003053 break;
Benny Halevyd24433c2012-02-16 20:57:17 +02003054 case NFS4_OPEN_DELEGATE_NONE_EXT: /* 4.1 */
3055 switch (open->op_why_no_deleg) {
3056 case WND4_CONTENTION:
3057 case WND4_RESOURCE:
J. Bruce Fieldsd0a381d2014-01-30 17:18:38 -05003058 p = xdr_reserve_space(xdr, 8);
3059 if (!p)
3060 return nfserr_resource;
J. Bruce Fieldsc373b0a2014-03-22 17:09:18 -04003061 *p++ = cpu_to_be32(open->op_why_no_deleg);
3062 /* deleg signaling not supported yet: */
3063 *p++ = cpu_to_be32(0);
Benny Halevyd24433c2012-02-16 20:57:17 +02003064 break;
3065 default:
J. Bruce Fieldsd0a381d2014-01-30 17:18:38 -05003066 p = xdr_reserve_space(xdr, 4);
3067 if (!p)
3068 return nfserr_resource;
J. Bruce Fieldsc373b0a2014-03-22 17:09:18 -04003069 *p++ = cpu_to_be32(open->op_why_no_deleg);
Benny Halevyd24433c2012-02-16 20:57:17 +02003070 }
Benny Halevyd24433c2012-02-16 20:57:17 +02003071 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003072 default:
3073 BUG();
3074 }
3075 /* XXX save filehandle here */
3076out:
Benny Halevy695e12f2008-07-04 14:38:33 +03003077 return nfserr;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003078}
3079
Benny Halevy695e12f2008-07-04 14:38:33 +03003080static __be32
Al Virob37ad282006-10-19 23:28:59 -07003081nfsd4_encode_open_confirm(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_confirm *oc)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003082{
J. Bruce Fieldsd0a381d2014-01-30 17:18:38 -05003083 struct xdr_stream *xdr = &resp->xdr;
3084
Benny Halevye2f282b2008-08-12 20:45:07 +03003085 if (!nfserr)
J. Bruce Fieldsd0a381d2014-01-30 17:18:38 -05003086 nfserr = nfsd4_encode_stateid(xdr, &oc->oc_resp_stateid);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003087
Benny Halevy695e12f2008-07-04 14:38:33 +03003088 return nfserr;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003089}
3090
Benny Halevy695e12f2008-07-04 14:38:33 +03003091static __be32
Al Virob37ad282006-10-19 23:28:59 -07003092nfsd4_encode_open_downgrade(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_downgrade *od)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003093{
J. Bruce Fieldsd0a381d2014-01-30 17:18:38 -05003094 struct xdr_stream *xdr = &resp->xdr;
3095
Benny Halevye2f282b2008-08-12 20:45:07 +03003096 if (!nfserr)
J. Bruce Fieldsd0a381d2014-01-30 17:18:38 -05003097 nfserr = nfsd4_encode_stateid(xdr, &od->od_stateid);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003098
Benny Halevy695e12f2008-07-04 14:38:33 +03003099 return nfserr;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003100}
3101
J. Bruce Fieldsdc976182014-03-18 17:01:51 -04003102static __be32 nfsd4_encode_splice_read(
3103 struct nfsd4_compoundres *resp,
3104 struct nfsd4_read *read,
3105 struct file *file, unsigned long maxcount)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003106{
J. Bruce Fieldsdc976182014-03-18 17:01:51 -04003107 struct xdr_stream *xdr = &resp->xdr;
J. Bruce Fields34a78b42014-05-13 16:32:04 -04003108 struct xdr_buf *buf = xdr->buf;
J. Bruce Fieldsdc976182014-03-18 17:01:51 -04003109 u32 eof;
J. Bruce Fieldsdc976182014-03-18 17:01:51 -04003110 int space_left;
3111 __be32 nfserr;
J. Bruce Fieldsfec25fa2014-05-13 17:27:03 -04003112 __be32 *p = xdr->p - 2;
J. Bruce Fieldsdc976182014-03-18 17:01:51 -04003113
Kinglong Meed5d5c302014-07-09 21:51:27 +08003114 /* Make sure there will be room for padding if needed */
3115 if (xdr->end - xdr->p < 1)
J. Bruce Fieldsdc976182014-03-18 17:01:51 -04003116 return nfserr_resource;
3117
3118 nfserr = nfsd_splice_read(read->rd_rqstp, file,
3119 read->rd_offset, &maxcount);
3120 if (nfserr) {
3121 /*
3122 * nfsd_splice_actor may have already messed with the
3123 * page length; reset it so as not to confuse
3124 * xdr_truncate_encode:
3125 */
J. Bruce Fields34a78b42014-05-13 16:32:04 -04003126 buf->page_len = 0;
J. Bruce Fieldsdc976182014-03-18 17:01:51 -04003127 return nfserr;
3128 }
3129
3130 eof = (read->rd_offset + maxcount >=
3131 read->rd_fhp->fh_dentry->d_inode->i_size);
3132
J. Bruce Fieldsfec25fa2014-05-13 17:27:03 -04003133 *(p++) = htonl(eof);
3134 *(p++) = htonl(maxcount);
J. Bruce Fieldsdc976182014-03-18 17:01:51 -04003135
J. Bruce Fields34a78b42014-05-13 16:32:04 -04003136 buf->page_len = maxcount;
3137 buf->len += maxcount;
J. Bruce Fields15b23ef2014-09-24 16:32:34 -04003138 xdr->page_ptr += (buf->page_base + maxcount + PAGE_SIZE - 1)
3139 / PAGE_SIZE;
J. Bruce Fieldsdc976182014-03-18 17:01:51 -04003140
3141 /* Use rest of head for padding and remaining ops: */
J. Bruce Fields34a78b42014-05-13 16:32:04 -04003142 buf->tail[0].iov_base = xdr->p;
3143 buf->tail[0].iov_len = 0;
J. Bruce Fieldsfec25fa2014-05-13 17:27:03 -04003144 xdr->iov = buf->tail;
J. Bruce Fieldsdc976182014-03-18 17:01:51 -04003145 if (maxcount&3) {
J. Bruce Fieldsfec25fa2014-05-13 17:27:03 -04003146 int pad = 4 - (maxcount&3);
3147
3148 *(xdr->p++) = 0;
3149
J. Bruce Fields34a78b42014-05-13 16:32:04 -04003150 buf->tail[0].iov_base += maxcount&3;
J. Bruce Fieldsfec25fa2014-05-13 17:27:03 -04003151 buf->tail[0].iov_len = pad;
3152 buf->len += pad;
J. Bruce Fieldsdc976182014-03-18 17:01:51 -04003153 }
3154
3155 space_left = min_t(int, (void *)xdr->end - (void *)xdr->p,
J. Bruce Fields34a78b42014-05-13 16:32:04 -04003156 buf->buflen - buf->len);
3157 buf->buflen = buf->len + space_left;
J. Bruce Fieldsdc976182014-03-18 17:01:51 -04003158 xdr->end = (__be32 *)((void *)xdr->end + space_left);
3159
3160 return 0;
3161}
3162
3163static __be32 nfsd4_encode_readv(struct nfsd4_compoundres *resp,
3164 struct nfsd4_read *read,
3165 struct file *file, unsigned long maxcount)
3166{
3167 struct xdr_stream *xdr = &resp->xdr;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003168 u32 eof;
J. Bruce Fieldsafc59402012-12-10 18:01:37 -05003169 int v;
J. Bruce Fieldsdc976182014-03-18 17:01:51 -04003170 int starting_len = xdr->buf->len - 8;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003171 long len;
J. Bruce Fieldsb0420982014-03-18 17:44:10 -04003172 int thislen;
J. Bruce Fieldsdc976182014-03-18 17:01:51 -04003173 __be32 nfserr;
3174 __be32 tmp;
J. Bruce Fieldsbc749ca2009-04-07 16:55:27 -07003175 __be32 *p;
J. Bruce Fieldsb0420982014-03-18 17:44:10 -04003176 u32 zzz = 0;
3177 int pad;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003178
Linus Torvalds1da177e2005-04-16 15:20:36 -07003179 len = maxcount;
3180 v = 0;
J. Bruce Fields6ff98972014-03-11 16:51:23 -04003181
Kinglong Mee10554142014-06-29 19:18:17 +08003182 thislen = min_t(long, len, ((void *)xdr->end - (void *)xdr->p));
J. Bruce Fieldsb0420982014-03-18 17:44:10 -04003183 p = xdr_reserve_space(xdr, (thislen+3)&~3);
3184 WARN_ON_ONCE(!p);
3185 resp->rqstp->rq_vec[v].iov_base = p;
3186 resp->rqstp->rq_vec[v].iov_len = thislen;
3187 v++;
3188 len -= thislen;
3189
3190 while (len) {
J. Bruce Fields6ff98972014-03-11 16:51:23 -04003191 thislen = min_t(long, len, PAGE_SIZE);
J. Bruce Fieldsb0420982014-03-18 17:44:10 -04003192 p = xdr_reserve_space(xdr, (thislen+3)&~3);
3193 WARN_ON_ONCE(!p);
3194 resp->rqstp->rq_vec[v].iov_base = p;
J. Bruce Fields6ff98972014-03-11 16:51:23 -04003195 resp->rqstp->rq_vec[v].iov_len = thislen;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003196 v++;
J. Bruce Fields6ff98972014-03-11 16:51:23 -04003197 len -= thislen;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003198 }
3199 read->rd_vlen = v;
3200
J. Bruce Fieldsdc976182014-03-18 17:01:51 -04003201 nfserr = nfsd_readv(file, read->rd_offset, resp->rqstp->rq_vec,
3202 read->rd_vlen, &maxcount);
3203 if (nfserr)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003204 return nfserr;
J. Bruce Fieldsb0420982014-03-18 17:44:10 -04003205 xdr_truncate_encode(xdr, starting_len + 8 + ((maxcount+3)&~3));
J. Bruce Fieldsdc976182014-03-18 17:01:51 -04003206
NeilBrown44524352006-10-04 02:15:46 -07003207 eof = (read->rd_offset + maxcount >=
3208 read->rd_fhp->fh_dentry->d_inode->i_size);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003209
J. Bruce Fieldsdc976182014-03-18 17:01:51 -04003210 tmp = htonl(eof);
3211 write_bytes_to_xdr_buf(xdr->buf, starting_len , &tmp, 4);
3212 tmp = htonl(maxcount);
3213 write_bytes_to_xdr_buf(xdr->buf, starting_len + 4, &tmp, 4);
3214
J. Bruce Fieldsb0420982014-03-18 17:44:10 -04003215 pad = (maxcount&3) ? 4 - (maxcount&3) : 0;
3216 write_bytes_to_xdr_buf(xdr->buf, starting_len + 8 + maxcount,
3217 &zzz, pad);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003218 return 0;
J. Bruce Fieldsdc976182014-03-18 17:01:51 -04003219
3220}
3221
3222static __be32
3223nfsd4_encode_read(struct nfsd4_compoundres *resp, __be32 nfserr,
3224 struct nfsd4_read *read)
3225{
3226 unsigned long maxcount;
3227 struct xdr_stream *xdr = &resp->xdr;
3228 struct file *file = read->rd_filp;
3229 int starting_len = xdr->buf->len;
3230 struct raparms *ra;
3231 __be32 *p;
3232 __be32 err;
3233
3234 if (nfserr)
3235 return nfserr;
3236
3237 p = xdr_reserve_space(xdr, 8); /* eof flag and byte count */
3238 if (!p) {
3239 WARN_ON_ONCE(resp->rqstp->rq_splice_ok);
3240 return nfserr_resource;
3241 }
J. Bruce Fieldsb0420982014-03-18 17:44:10 -04003242 if (resp->xdr.buf->page_len && resp->rqstp->rq_splice_ok) {
3243 WARN_ON_ONCE(1);
J. Bruce Fieldsdc976182014-03-18 17:01:51 -04003244 return nfserr_resource;
3245 }
J. Bruce Fieldsdc976182014-03-18 17:01:51 -04003246 xdr_commit_encode(xdr);
3247
3248 maxcount = svc_max_payload(resp->rqstp);
Kinglong Mee3c7aa152014-06-10 18:08:19 +08003249 maxcount = min_t(unsigned long, maxcount, (xdr->buf->buflen - xdr->buf->len));
3250 maxcount = min_t(unsigned long, maxcount, read->rd_length);
J. Bruce Fieldsdc976182014-03-18 17:01:51 -04003251
3252 if (!read->rd_filp) {
3253 err = nfsd_get_tmp_read_open(resp->rqstp, read->rd_fhp,
3254 &file, &ra);
3255 if (err)
3256 goto err_truncate;
3257 }
3258
3259 if (file->f_op->splice_read && resp->rqstp->rq_splice_ok)
3260 err = nfsd4_encode_splice_read(resp, read, file, maxcount);
3261 else
3262 err = nfsd4_encode_readv(resp, read, file, maxcount);
3263
3264 if (!read->rd_filp)
3265 nfsd_put_tmp_read_open(file, ra);
3266
3267err_truncate:
3268 if (err)
3269 xdr_truncate_encode(xdr, starting_len);
3270 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003271}
3272
Al Virob37ad282006-10-19 23:28:59 -07003273static __be32
3274nfsd4_encode_readlink(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readlink *readlink)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003275{
3276 int maxcount;
J. Bruce Fields476a7b12014-01-20 17:08:27 -05003277 __be32 wire_count;
3278 int zero = 0;
J. Bruce Fieldsddd1ea52013-08-27 21:32:25 -04003279 struct xdr_stream *xdr = &resp->xdr;
J. Bruce Fields1fcea5b2014-02-26 20:17:02 -05003280 int length_offset = xdr->buf->len;
J. Bruce Fieldsbc749ca2009-04-07 16:55:27 -07003281 __be32 *p;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003282
3283 if (nfserr)
3284 return nfserr;
J. Bruce Fields2825a7f2013-08-26 16:04:46 -04003285
3286 p = xdr_reserve_space(xdr, 4);
3287 if (!p)
3288 return nfserr_resource;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003289 maxcount = PAGE_SIZE;
J. Bruce Fieldsd0a381d2014-01-30 17:18:38 -05003290
J. Bruce Fields476a7b12014-01-20 17:08:27 -05003291 p = xdr_reserve_space(xdr, maxcount);
3292 if (!p)
J. Bruce Fields4e21ac42014-03-22 15:15:11 -04003293 return nfserr_resource;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003294 /*
3295 * XXX: By default, the ->readlink() VFS op will truncate symlinks
3296 * if they would overflow the buffer. Is this kosher in NFSv4? If
3297 * not, one easy fix is: if ->readlink() precisely fills the buffer,
3298 * assume that truncation occurred, and return NFS4ERR_RESOURCE.
3299 */
J. Bruce Fields476a7b12014-01-20 17:08:27 -05003300 nfserr = nfsd_readlink(readlink->rl_rqstp, readlink->rl_fhp,
3301 (char *)p, &maxcount);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003302 if (nfserr == nfserr_isdir)
J. Bruce Fieldsd3f627c2014-02-26 17:00:38 -05003303 nfserr = nfserr_inval;
3304 if (nfserr) {
J. Bruce Fields1fcea5b2014-02-26 20:17:02 -05003305 xdr_truncate_encode(xdr, length_offset);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003306 return nfserr;
J. Bruce Fieldsd3f627c2014-02-26 17:00:38 -05003307 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07003308
J. Bruce Fields476a7b12014-01-20 17:08:27 -05003309 wire_count = htonl(maxcount);
3310 write_bytes_to_xdr_buf(xdr->buf, length_offset, &wire_count, 4);
Avi Kivity69bbd9c2014-06-26 17:23:12 +03003311 xdr_truncate_encode(xdr, length_offset + 4 + ALIGN(maxcount, 4));
J. Bruce Fields476a7b12014-01-20 17:08:27 -05003312 if (maxcount & 3)
3313 write_bytes_to_xdr_buf(xdr->buf, length_offset + 4 + maxcount,
3314 &zero, 4 - (maxcount&3));
Linus Torvalds1da177e2005-04-16 15:20:36 -07003315 return 0;
3316}
3317
Al Virob37ad282006-10-19 23:28:59 -07003318static __be32
3319nfsd4_encode_readdir(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readdir *readdir)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003320{
3321 int maxcount;
J. Bruce Fields561f0ed2014-01-20 16:37:11 -05003322 int bytes_left;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003323 loff_t offset;
J. Bruce Fields561f0ed2014-01-20 16:37:11 -05003324 __be64 wire_offset;
J. Bruce Fieldsddd1ea52013-08-27 21:32:25 -04003325 struct xdr_stream *xdr = &resp->xdr;
J. Bruce Fields1fcea5b2014-02-26 20:17:02 -05003326 int starting_len = xdr->buf->len;
J. Bruce Fieldsbc749ca2009-04-07 16:55:27 -07003327 __be32 *p;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003328
3329 if (nfserr)
3330 return nfserr;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003331
J. Bruce Fieldsd0a381d2014-01-30 17:18:38 -05003332 p = xdr_reserve_space(xdr, NFS4_VERIFIER_SIZE);
3333 if (!p)
3334 return nfserr_resource;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003335
3336 /* XXX: Following NFSv3, we ignore the READDIR verifier for now. */
J. Bruce Fieldsc373b0a2014-03-22 17:09:18 -04003337 *p++ = cpu_to_be32(0);
3338 *p++ = cpu_to_be32(0);
J. Bruce Fields4aea24b2014-01-15 15:17:58 -05003339 resp->xdr.buf->head[0].iov_len = ((char *)resp->xdr.p)
3340 - (char *)resp->xdr.buf->head[0].iov_base;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003341
3342 /*
J. Bruce Fields561f0ed2014-01-20 16:37:11 -05003343 * Number of bytes left for directory entries allowing for the
3344 * final 8 bytes of the readdir and a following failed op:
Linus Torvalds1da177e2005-04-16 15:20:36 -07003345 */
J. Bruce Fields561f0ed2014-01-20 16:37:11 -05003346 bytes_left = xdr->buf->buflen - xdr->buf->len
3347 - COMPOUND_ERR_SLACK_SPACE - 8;
3348 if (bytes_left < 0) {
3349 nfserr = nfserr_resource;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003350 goto err_no_verf;
3351 }
J. Bruce Fields561f0ed2014-01-20 16:37:11 -05003352 maxcount = min_t(u32, readdir->rd_maxcount, INT_MAX);
3353 /*
3354 * Note the rfc defines rd_maxcount as the size of the
3355 * READDIR4resok structure, which includes the verifier above
3356 * and the 8 bytes encoded at the end of this function:
3357 */
3358 if (maxcount < 16) {
3359 nfserr = nfserr_toosmall;
3360 goto err_no_verf;
3361 }
3362 maxcount = min_t(int, maxcount-16, bytes_left);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003363
J. Bruce Fieldsaee37762014-08-20 14:49:50 -04003364 /* RFC 3530 14.2.24 allows us to ignore dircount when it's 0: */
3365 if (!readdir->rd_dircount)
3366 readdir->rd_dircount = INT_MAX;
3367
J. Bruce Fields561f0ed2014-01-20 16:37:11 -05003368 readdir->xdr = xdr;
3369 readdir->rd_maxcount = maxcount;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003370 readdir->common.err = 0;
J. Bruce Fields561f0ed2014-01-20 16:37:11 -05003371 readdir->cookie_offset = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003372
3373 offset = readdir->rd_cookie;
3374 nfserr = nfsd_readdir(readdir->rd_rqstp, readdir->rd_fhp,
3375 &offset,
3376 &readdir->common, nfsd4_encode_dirent);
3377 if (nfserr == nfs_ok &&
3378 readdir->common.err == nfserr_toosmall &&
J. Bruce Fields561f0ed2014-01-20 16:37:11 -05003379 xdr->buf->len == starting_len + 8) {
3380 /* nothing encoded; which limit did we hit?: */
3381 if (maxcount - 16 < bytes_left)
3382 /* It was the fault of rd_maxcount: */
3383 nfserr = nfserr_toosmall;
3384 else
3385 /* We ran out of buffer space: */
3386 nfserr = nfserr_resource;
3387 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07003388 if (nfserr)
3389 goto err_no_verf;
3390
J. Bruce Fields561f0ed2014-01-20 16:37:11 -05003391 if (readdir->cookie_offset) {
3392 wire_offset = cpu_to_be64(offset);
3393 write_bytes_to_xdr_buf(xdr->buf, readdir->cookie_offset,
3394 &wire_offset, 8);
3395 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07003396
J. Bruce Fields561f0ed2014-01-20 16:37:11 -05003397 p = xdr_reserve_space(xdr, 8);
3398 if (!p) {
3399 WARN_ON_ONCE(1);
3400 goto err_no_verf;
3401 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07003402 *p++ = 0; /* no more entries */
3403 *p++ = htonl(readdir->common.err == nfserr_eof);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003404
3405 return 0;
3406err_no_verf:
J. Bruce Fields1fcea5b2014-02-26 20:17:02 -05003407 xdr_truncate_encode(xdr, starting_len);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003408 return nfserr;
3409}
3410
Benny Halevy695e12f2008-07-04 14:38:33 +03003411static __be32
Al Virob37ad282006-10-19 23:28:59 -07003412nfsd4_encode_remove(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_remove *remove)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003413{
J. Bruce Fieldsd0a381d2014-01-30 17:18:38 -05003414 struct xdr_stream *xdr = &resp->xdr;
J. Bruce Fieldsbc749ca2009-04-07 16:55:27 -07003415 __be32 *p;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003416
3417 if (!nfserr) {
J. Bruce Fieldsd0a381d2014-01-30 17:18:38 -05003418 p = xdr_reserve_space(xdr, 20);
3419 if (!p)
3420 return nfserr_resource;
J. Bruce Fieldsd05d5742014-03-22 18:48:39 -04003421 p = encode_cinfo(p, &remove->rm_cinfo);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003422 }
Benny Halevy695e12f2008-07-04 14:38:33 +03003423 return nfserr;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003424}
3425
Benny Halevy695e12f2008-07-04 14:38:33 +03003426static __be32
Al Virob37ad282006-10-19 23:28:59 -07003427nfsd4_encode_rename(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_rename *rename)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003428{
J. Bruce Fieldsd0a381d2014-01-30 17:18:38 -05003429 struct xdr_stream *xdr = &resp->xdr;
J. Bruce Fieldsbc749ca2009-04-07 16:55:27 -07003430 __be32 *p;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003431
3432 if (!nfserr) {
J. Bruce Fieldsd0a381d2014-01-30 17:18:38 -05003433 p = xdr_reserve_space(xdr, 40);
3434 if (!p)
3435 return nfserr_resource;
J. Bruce Fieldsd05d5742014-03-22 18:48:39 -04003436 p = encode_cinfo(p, &rename->rn_sinfo);
3437 p = encode_cinfo(p, &rename->rn_tinfo);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003438 }
Benny Halevy695e12f2008-07-04 14:38:33 +03003439 return nfserr;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003440}
3441
Benny Halevy695e12f2008-07-04 14:38:33 +03003442static __be32
J. Bruce Fieldsd0a381d2014-01-30 17:18:38 -05003443nfsd4_do_encode_secinfo(struct xdr_stream *xdr,
Chuck Levera77c8062013-03-16 15:55:10 -04003444 __be32 nfserr, struct svc_export *exp)
Andy Adamsondcb488a32007-07-17 04:04:51 -07003445{
Chuck Lever676e4eb2013-04-30 18:48:54 -04003446 u32 i, nflavs, supported;
J. Bruce Fields4796f452007-07-17 04:04:51 -07003447 struct exp_flavor_info *flavs;
3448 struct exp_flavor_info def_flavs[2];
Chuck Lever676e4eb2013-04-30 18:48:54 -04003449 __be32 *p, *flavorsp;
3450 static bool report = true;
Andy Adamsondcb488a32007-07-17 04:04:51 -07003451
3452 if (nfserr)
3453 goto out;
J. Bruce Fieldsd0a381d2014-01-30 17:18:38 -05003454 nfserr = nfserr_resource;
J. Bruce Fields4796f452007-07-17 04:04:51 -07003455 if (exp->ex_nflavors) {
3456 flavs = exp->ex_flavors;
3457 nflavs = exp->ex_nflavors;
3458 } else { /* Handling of some defaults in absence of real secinfo: */
3459 flavs = def_flavs;
3460 if (exp->ex_client->flavour->flavour == RPC_AUTH_UNIX) {
3461 nflavs = 2;
3462 flavs[0].pseudoflavor = RPC_AUTH_UNIX;
3463 flavs[1].pseudoflavor = RPC_AUTH_NULL;
3464 } else if (exp->ex_client->flavour->flavour == RPC_AUTH_GSS) {
3465 nflavs = 1;
3466 flavs[0].pseudoflavor
3467 = svcauth_gss_flavor(exp->ex_client);
3468 } else {
3469 nflavs = 1;
3470 flavs[0].pseudoflavor
3471 = exp->ex_client->flavour->flavour;
3472 }
3473 }
3474
Chuck Lever676e4eb2013-04-30 18:48:54 -04003475 supported = 0;
J. Bruce Fieldsd0a381d2014-01-30 17:18:38 -05003476 p = xdr_reserve_space(xdr, 4);
3477 if (!p)
3478 goto out;
Chuck Lever676e4eb2013-04-30 18:48:54 -04003479 flavorsp = p++; /* to be backfilled later */
Chuck Lever676e4eb2013-04-30 18:48:54 -04003480
J. Bruce Fields4796f452007-07-17 04:04:51 -07003481 for (i = 0; i < nflavs; i++) {
Chuck Lever676e4eb2013-04-30 18:48:54 -04003482 rpc_authflavor_t pf = flavs[i].pseudoflavor;
Chuck Levera77c8062013-03-16 15:55:10 -04003483 struct rpcsec_gss_info info;
Andy Adamsondcb488a32007-07-17 04:04:51 -07003484
Chuck Lever676e4eb2013-04-30 18:48:54 -04003485 if (rpcauth_get_gssinfo(pf, &info) == 0) {
3486 supported++;
J. Bruce Fieldsd0a381d2014-01-30 17:18:38 -05003487 p = xdr_reserve_space(xdr, 4 + 4 +
3488 XDR_LEN(info.oid.len) + 4 + 4);
3489 if (!p)
3490 goto out;
J. Bruce Fieldsc373b0a2014-03-22 17:09:18 -04003491 *p++ = cpu_to_be32(RPC_AUTH_GSS);
J. Bruce Fields0c0c2672014-03-22 18:43:16 -04003492 p = xdr_encode_opaque(p, info.oid.data, info.oid.len);
J. Bruce Fieldsc373b0a2014-03-22 17:09:18 -04003493 *p++ = cpu_to_be32(info.qop);
3494 *p++ = cpu_to_be32(info.service);
Chuck Lever676e4eb2013-04-30 18:48:54 -04003495 } else if (pf < RPC_AUTH_MAXFLAVOR) {
3496 supported++;
J. Bruce Fieldsd0a381d2014-01-30 17:18:38 -05003497 p = xdr_reserve_space(xdr, 4);
3498 if (!p)
3499 goto out;
J. Bruce Fieldsc373b0a2014-03-22 17:09:18 -04003500 *p++ = cpu_to_be32(pf);
Chuck Lever676e4eb2013-04-30 18:48:54 -04003501 } else {
3502 if (report)
3503 pr_warn("NFS: SECINFO: security flavor %u "
3504 "is not supported\n", pf);
Andy Adamsondcb488a32007-07-17 04:04:51 -07003505 }
3506 }
Chuck Levera77c8062013-03-16 15:55:10 -04003507
Chuck Lever676e4eb2013-04-30 18:48:54 -04003508 if (nflavs != supported)
3509 report = false;
3510 *flavorsp = htonl(supported);
J. Bruce Fieldsd0a381d2014-01-30 17:18:38 -05003511 nfserr = 0;
Andy Adamsondcb488a32007-07-17 04:04:51 -07003512out:
3513 if (exp)
3514 exp_put(exp);
Benny Halevy695e12f2008-07-04 14:38:33 +03003515 return nfserr;
Andy Adamsondcb488a32007-07-17 04:04:51 -07003516}
3517
Mi Jinlong22b6dee2010-12-27 14:29:57 +08003518static __be32
3519nfsd4_encode_secinfo(struct nfsd4_compoundres *resp, __be32 nfserr,
3520 struct nfsd4_secinfo *secinfo)
3521{
J. Bruce Fieldsd0a381d2014-01-30 17:18:38 -05003522 struct xdr_stream *xdr = &resp->xdr;
3523
3524 return nfsd4_do_encode_secinfo(xdr, nfserr, secinfo->si_exp);
Mi Jinlong22b6dee2010-12-27 14:29:57 +08003525}
3526
3527static __be32
3528nfsd4_encode_secinfo_no_name(struct nfsd4_compoundres *resp, __be32 nfserr,
3529 struct nfsd4_secinfo_no_name *secinfo)
3530{
J. Bruce Fieldsd0a381d2014-01-30 17:18:38 -05003531 struct xdr_stream *xdr = &resp->xdr;
3532
3533 return nfsd4_do_encode_secinfo(xdr, nfserr, secinfo->sin_exp);
Mi Jinlong22b6dee2010-12-27 14:29:57 +08003534}
3535
Linus Torvalds1da177e2005-04-16 15:20:36 -07003536/*
3537 * The SETATTR encode routine is special -- it always encodes a bitmap,
3538 * regardless of the error status.
3539 */
Benny Halevy695e12f2008-07-04 14:38:33 +03003540static __be32
Al Virob37ad282006-10-19 23:28:59 -07003541nfsd4_encode_setattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setattr *setattr)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003542{
J. Bruce Fieldsd0a381d2014-01-30 17:18:38 -05003543 struct xdr_stream *xdr = &resp->xdr;
J. Bruce Fieldsbc749ca2009-04-07 16:55:27 -07003544 __be32 *p;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003545
J. Bruce Fieldsd0a381d2014-01-30 17:18:38 -05003546 p = xdr_reserve_space(xdr, 16);
3547 if (!p)
3548 return nfserr_resource;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003549 if (nfserr) {
J. Bruce Fieldsc373b0a2014-03-22 17:09:18 -04003550 *p++ = cpu_to_be32(3);
3551 *p++ = cpu_to_be32(0);
3552 *p++ = cpu_to_be32(0);
3553 *p++ = cpu_to_be32(0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003554 }
3555 else {
J. Bruce Fieldsc373b0a2014-03-22 17:09:18 -04003556 *p++ = cpu_to_be32(3);
3557 *p++ = cpu_to_be32(setattr->sa_bmval[0]);
3558 *p++ = cpu_to_be32(setattr->sa_bmval[1]);
3559 *p++ = cpu_to_be32(setattr->sa_bmval[2]);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003560 }
Benny Halevy695e12f2008-07-04 14:38:33 +03003561 return nfserr;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003562}
3563
Benny Halevy695e12f2008-07-04 14:38:33 +03003564static __be32
Al Virob37ad282006-10-19 23:28:59 -07003565nfsd4_encode_setclientid(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setclientid *scd)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003566{
J. Bruce Fieldsd0a381d2014-01-30 17:18:38 -05003567 struct xdr_stream *xdr = &resp->xdr;
J. Bruce Fieldsbc749ca2009-04-07 16:55:27 -07003568 __be32 *p;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003569
3570 if (!nfserr) {
J. Bruce Fieldsd0a381d2014-01-30 17:18:38 -05003571 p = xdr_reserve_space(xdr, 8 + NFS4_VERIFIER_SIZE);
3572 if (!p)
3573 return nfserr_resource;
J. Bruce Fields0c0c2672014-03-22 18:43:16 -04003574 p = xdr_encode_opaque_fixed(p, &scd->se_clientid, 8);
3575 p = xdr_encode_opaque_fixed(p, &scd->se_confirm,
3576 NFS4_VERIFIER_SIZE);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003577 }
3578 else if (nfserr == nfserr_clid_inuse) {
J. Bruce Fieldsd0a381d2014-01-30 17:18:38 -05003579 p = xdr_reserve_space(xdr, 8);
3580 if (!p)
3581 return nfserr_resource;
J. Bruce Fieldsc373b0a2014-03-22 17:09:18 -04003582 *p++ = cpu_to_be32(0);
3583 *p++ = cpu_to_be32(0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003584 }
Benny Halevy695e12f2008-07-04 14:38:33 +03003585 return nfserr;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003586}
3587
Benny Halevy695e12f2008-07-04 14:38:33 +03003588static __be32
Al Virob37ad282006-10-19 23:28:59 -07003589nfsd4_encode_write(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_write *write)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003590{
J. Bruce Fieldsd0a381d2014-01-30 17:18:38 -05003591 struct xdr_stream *xdr = &resp->xdr;
J. Bruce Fieldsbc749ca2009-04-07 16:55:27 -07003592 __be32 *p;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003593
3594 if (!nfserr) {
J. Bruce Fieldsd0a381d2014-01-30 17:18:38 -05003595 p = xdr_reserve_space(xdr, 16);
3596 if (!p)
3597 return nfserr_resource;
J. Bruce Fieldsc373b0a2014-03-22 17:09:18 -04003598 *p++ = cpu_to_be32(write->wr_bytes_written);
3599 *p++ = cpu_to_be32(write->wr_how_written);
J. Bruce Fields0c0c2672014-03-22 18:43:16 -04003600 p = xdr_encode_opaque_fixed(p, write->wr_verifier.data,
3601 NFS4_VERIFIER_SIZE);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003602 }
Benny Halevy695e12f2008-07-04 14:38:33 +03003603 return nfserr;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003604}
3605
J. Bruce Fields57266a62013-04-13 14:27:29 -04003606static const u32 nfs4_minimal_spo_must_enforce[2] = {
3607 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) |
3608 1 << (OP_EXCHANGE_ID - 32) |
3609 1 << (OP_CREATE_SESSION - 32) |
3610 1 << (OP_DESTROY_SESSION - 32) |
3611 1 << (OP_DESTROY_CLIENTID - 32)
3612};
3613
Benny Halevy695e12f2008-07-04 14:38:33 +03003614static __be32
J. Bruce Fields57b7b432012-04-25 17:58:50 -04003615nfsd4_encode_exchange_id(struct nfsd4_compoundres *resp, __be32 nfserr,
Andy Adamson2db134e2009-04-03 08:27:55 +03003616 struct nfsd4_exchange_id *exid)
3617{
J. Bruce Fieldsd0a381d2014-01-30 17:18:38 -05003618 struct xdr_stream *xdr = &resp->xdr;
J. Bruce Fieldsbc749ca2009-04-07 16:55:27 -07003619 __be32 *p;
Andy Adamson0733d212009-04-03 08:28:01 +03003620 char *major_id;
3621 char *server_scope;
3622 int major_id_sz;
3623 int server_scope_sz;
3624 uint64_t minor_id = 0;
3625
3626 if (nfserr)
3627 return nfserr;
3628
3629 major_id = utsname()->nodename;
3630 major_id_sz = strlen(major_id);
3631 server_scope = utsname()->nodename;
3632 server_scope_sz = strlen(server_scope);
3633
J. Bruce Fieldsd0a381d2014-01-30 17:18:38 -05003634 p = xdr_reserve_space(xdr,
Andy Adamson0733d212009-04-03 08:28:01 +03003635 8 /* eir_clientid */ +
3636 4 /* eir_sequenceid */ +
3637 4 /* eir_flags */ +
Kinglong Meea8bb84b2013-12-10 15:24:36 +08003638 4 /* spr_how */);
J. Bruce Fieldsd0a381d2014-01-30 17:18:38 -05003639 if (!p)
3640 return nfserr_resource;
Andy Adamson0733d212009-04-03 08:28:01 +03003641
J. Bruce Fields0c0c2672014-03-22 18:43:16 -04003642 p = xdr_encode_opaque_fixed(p, &exid->clientid, 8);
J. Bruce Fieldsc373b0a2014-03-22 17:09:18 -04003643 *p++ = cpu_to_be32(exid->seqid);
3644 *p++ = cpu_to_be32(exid->flags);
Andy Adamson0733d212009-04-03 08:28:01 +03003645
J. Bruce Fieldsc373b0a2014-03-22 17:09:18 -04003646 *p++ = cpu_to_be32(exid->spa_how);
Kinglong Meea8bb84b2013-12-10 15:24:36 +08003647
J. Bruce Fields57266a62013-04-13 14:27:29 -04003648 switch (exid->spa_how) {
3649 case SP4_NONE:
3650 break;
3651 case SP4_MACH_CRED:
Kinglong Meea8bb84b2013-12-10 15:24:36 +08003652 /* spo_must_enforce, spo_must_allow */
J. Bruce Fieldsd0a381d2014-01-30 17:18:38 -05003653 p = xdr_reserve_space(xdr, 16);
3654 if (!p)
3655 return nfserr_resource;
Kinglong Meea8bb84b2013-12-10 15:24:36 +08003656
J. Bruce Fields57266a62013-04-13 14:27:29 -04003657 /* spo_must_enforce bitmap: */
J. Bruce Fieldsc373b0a2014-03-22 17:09:18 -04003658 *p++ = cpu_to_be32(2);
3659 *p++ = cpu_to_be32(nfs4_minimal_spo_must_enforce[0]);
3660 *p++ = cpu_to_be32(nfs4_minimal_spo_must_enforce[1]);
J. Bruce Fields57266a62013-04-13 14:27:29 -04003661 /* empty spo_must_allow bitmap: */
J. Bruce Fieldsc373b0a2014-03-22 17:09:18 -04003662 *p++ = cpu_to_be32(0);
Kinglong Meea8bb84b2013-12-10 15:24:36 +08003663
J. Bruce Fields57266a62013-04-13 14:27:29 -04003664 break;
3665 default:
3666 WARN_ON_ONCE(1);
3667 }
Andy Adamson0733d212009-04-03 08:28:01 +03003668
J. Bruce Fieldsd0a381d2014-01-30 17:18:38 -05003669 p = xdr_reserve_space(xdr,
Kinglong Meea8bb84b2013-12-10 15:24:36 +08003670 8 /* so_minor_id */ +
3671 4 /* so_major_id.len */ +
3672 (XDR_QUADLEN(major_id_sz) * 4) +
3673 4 /* eir_server_scope.len */ +
3674 (XDR_QUADLEN(server_scope_sz) * 4) +
3675 4 /* eir_server_impl_id.count (0) */);
J. Bruce Fieldsd0a381d2014-01-30 17:18:38 -05003676 if (!p)
3677 return nfserr_resource;
Kinglong Meea8bb84b2013-12-10 15:24:36 +08003678
Andy Adamson0733d212009-04-03 08:28:01 +03003679 /* The server_owner struct */
J. Bruce Fieldsb64c7f32014-03-22 17:11:35 -04003680 p = xdr_encode_hyper(p, minor_id); /* Minor id */
Andy Adamson0733d212009-04-03 08:28:01 +03003681 /* major id */
J. Bruce Fields0c0c2672014-03-22 18:43:16 -04003682 p = xdr_encode_opaque(p, major_id, major_id_sz);
Andy Adamson0733d212009-04-03 08:28:01 +03003683
3684 /* Server scope */
J. Bruce Fields0c0c2672014-03-22 18:43:16 -04003685 p = xdr_encode_opaque(p, server_scope, server_scope_sz);
Andy Adamson0733d212009-04-03 08:28:01 +03003686
3687 /* Implementation id */
J. Bruce Fieldsc373b0a2014-03-22 17:09:18 -04003688 *p++ = cpu_to_be32(0); /* zero length nfs_impl_id4 array */
Andy Adamson0733d212009-04-03 08:28:01 +03003689 return 0;
Andy Adamson2db134e2009-04-03 08:27:55 +03003690}
3691
3692static __be32
J. Bruce Fields57b7b432012-04-25 17:58:50 -04003693nfsd4_encode_create_session(struct nfsd4_compoundres *resp, __be32 nfserr,
Andy Adamson2db134e2009-04-03 08:27:55 +03003694 struct nfsd4_create_session *sess)
3695{
J. Bruce Fieldsd0a381d2014-01-30 17:18:38 -05003696 struct xdr_stream *xdr = &resp->xdr;
J. Bruce Fieldsbc749ca2009-04-07 16:55:27 -07003697 __be32 *p;
Andy Adamsonec6b5d72009-04-03 08:28:28 +03003698
3699 if (nfserr)
3700 return nfserr;
3701
J. Bruce Fieldsd0a381d2014-01-30 17:18:38 -05003702 p = xdr_reserve_space(xdr, 24);
3703 if (!p)
3704 return nfserr_resource;
J. Bruce Fields0c0c2672014-03-22 18:43:16 -04003705 p = xdr_encode_opaque_fixed(p, sess->sessionid.data,
3706 NFS4_MAX_SESSIONID_LEN);
J. Bruce Fieldsc373b0a2014-03-22 17:09:18 -04003707 *p++ = cpu_to_be32(sess->seqid);
3708 *p++ = cpu_to_be32(sess->flags);
Andy Adamsonec6b5d72009-04-03 08:28:28 +03003709
J. Bruce Fieldsd0a381d2014-01-30 17:18:38 -05003710 p = xdr_reserve_space(xdr, 28);
3711 if (!p)
3712 return nfserr_resource;
J. Bruce Fieldsc373b0a2014-03-22 17:09:18 -04003713 *p++ = cpu_to_be32(0); /* headerpadsz */
3714 *p++ = cpu_to_be32(sess->fore_channel.maxreq_sz);
3715 *p++ = cpu_to_be32(sess->fore_channel.maxresp_sz);
3716 *p++ = cpu_to_be32(sess->fore_channel.maxresp_cached);
3717 *p++ = cpu_to_be32(sess->fore_channel.maxops);
3718 *p++ = cpu_to_be32(sess->fore_channel.maxreqs);
3719 *p++ = cpu_to_be32(sess->fore_channel.nr_rdma_attrs);
Andy Adamsonec6b5d72009-04-03 08:28:28 +03003720
3721 if (sess->fore_channel.nr_rdma_attrs) {
J. Bruce Fieldsd0a381d2014-01-30 17:18:38 -05003722 p = xdr_reserve_space(xdr, 4);
3723 if (!p)
3724 return nfserr_resource;
J. Bruce Fieldsc373b0a2014-03-22 17:09:18 -04003725 *p++ = cpu_to_be32(sess->fore_channel.rdma_attrs);
Andy Adamsonec6b5d72009-04-03 08:28:28 +03003726 }
3727
J. Bruce Fieldsd0a381d2014-01-30 17:18:38 -05003728 p = xdr_reserve_space(xdr, 28);
3729 if (!p)
3730 return nfserr_resource;
J. Bruce Fieldsc373b0a2014-03-22 17:09:18 -04003731 *p++ = cpu_to_be32(0); /* headerpadsz */
3732 *p++ = cpu_to_be32(sess->back_channel.maxreq_sz);
3733 *p++ = cpu_to_be32(sess->back_channel.maxresp_sz);
3734 *p++ = cpu_to_be32(sess->back_channel.maxresp_cached);
3735 *p++ = cpu_to_be32(sess->back_channel.maxops);
3736 *p++ = cpu_to_be32(sess->back_channel.maxreqs);
3737 *p++ = cpu_to_be32(sess->back_channel.nr_rdma_attrs);
Andy Adamsonec6b5d72009-04-03 08:28:28 +03003738
3739 if (sess->back_channel.nr_rdma_attrs) {
J. Bruce Fieldsd0a381d2014-01-30 17:18:38 -05003740 p = xdr_reserve_space(xdr, 4);
3741 if (!p)
3742 return nfserr_resource;
J. Bruce Fieldsc373b0a2014-03-22 17:09:18 -04003743 *p++ = cpu_to_be32(sess->back_channel.rdma_attrs);
Andy Adamsonec6b5d72009-04-03 08:28:28 +03003744 }
3745 return 0;
Andy Adamson2db134e2009-04-03 08:27:55 +03003746}
3747
3748static __be32
J. Bruce Fields57b7b432012-04-25 17:58:50 -04003749nfsd4_encode_sequence(struct nfsd4_compoundres *resp, __be32 nfserr,
Andy Adamson2db134e2009-04-03 08:27:55 +03003750 struct nfsd4_sequence *seq)
3751{
J. Bruce Fieldsd0a381d2014-01-30 17:18:38 -05003752 struct xdr_stream *xdr = &resp->xdr;
J. Bruce Fieldsbc749ca2009-04-07 16:55:27 -07003753 __be32 *p;
Benny Halevyb85d4c02009-04-03 08:28:08 +03003754
3755 if (nfserr)
3756 return nfserr;
3757
J. Bruce Fieldsd0a381d2014-01-30 17:18:38 -05003758 p = xdr_reserve_space(xdr, NFS4_MAX_SESSIONID_LEN + 20);
3759 if (!p)
3760 return nfserr_resource;
J. Bruce Fields0c0c2672014-03-22 18:43:16 -04003761 p = xdr_encode_opaque_fixed(p, seq->sessionid.data,
3762 NFS4_MAX_SESSIONID_LEN);
J. Bruce Fieldsc373b0a2014-03-22 17:09:18 -04003763 *p++ = cpu_to_be32(seq->seqid);
3764 *p++ = cpu_to_be32(seq->slotid);
J. Bruce Fieldsb7d7ca32011-08-31 15:39:30 -04003765 /* Note slotid's are numbered from zero: */
J. Bruce Fieldsc373b0a2014-03-22 17:09:18 -04003766 *p++ = cpu_to_be32(seq->maxslots - 1); /* sr_highest_slotid */
3767 *p++ = cpu_to_be32(seq->maxslots - 1); /* sr_target_highest_slotid */
3768 *p++ = cpu_to_be32(seq->status_flags);
Benny Halevyb85d4c02009-04-03 08:28:08 +03003769
J. Bruce Fieldsf5236012014-03-21 17:57:57 -04003770 resp->cstate.data_offset = xdr->buf->len; /* DRC cache data pointer */
Benny Halevyb85d4c02009-04-03 08:28:08 +03003771 return 0;
Andy Adamson2db134e2009-04-03 08:27:55 +03003772}
3773
J. Bruce Fields2355c592012-04-25 16:56:22 -04003774static __be32
J. Bruce Fields57b7b432012-04-25 17:58:50 -04003775nfsd4_encode_test_stateid(struct nfsd4_compoundres *resp, __be32 nfserr,
Bryan Schumaker17456802011-07-13 10:50:48 -04003776 struct nfsd4_test_stateid *test_stateid)
3777{
J. Bruce Fieldsd0a381d2014-01-30 17:18:38 -05003778 struct xdr_stream *xdr = &resp->xdr;
Bryan Schumaker03cfb422012-01-27 10:22:49 -05003779 struct nfsd4_test_stateid_id *stateid, *next;
Bryan Schumaker17456802011-07-13 10:50:48 -04003780 __be32 *p;
Bryan Schumaker17456802011-07-13 10:50:48 -04003781
J. Bruce Fieldsa11fcce2014-02-03 16:31:42 -05003782 if (nfserr)
3783 return nfserr;
3784
J. Bruce Fieldsd0a381d2014-01-30 17:18:38 -05003785 p = xdr_reserve_space(xdr, 4 + (4 * test_stateid->ts_num_ids));
3786 if (!p)
3787 return nfserr_resource;
Bryan Schumaker17456802011-07-13 10:50:48 -04003788 *p++ = htonl(test_stateid->ts_num_ids);
Bryan Schumaker17456802011-07-13 10:50:48 -04003789
Bryan Schumaker03cfb422012-01-27 10:22:49 -05003790 list_for_each_entry_safe(stateid, next, &test_stateid->ts_stateid_list, ts_id_list) {
Al Viro02f5fde2012-04-13 00:10:34 -04003791 *p++ = stateid->ts_id_status;
Bryan Schumaker17456802011-07-13 10:50:48 -04003792 }
Bryan Schumaker17456802011-07-13 10:50:48 -04003793
3794 return nfserr;
3795}
3796
Andy Adamson2db134e2009-04-03 08:27:55 +03003797static __be32
Anna Schumaker24bab492014-09-26 13:58:27 -04003798nfsd4_encode_seek(struct nfsd4_compoundres *resp, __be32 nfserr,
3799 struct nfsd4_seek *seek)
3800{
3801 __be32 *p;
3802
3803 if (nfserr)
3804 return nfserr;
3805
3806 p = xdr_reserve_space(&resp->xdr, 4 + 8);
3807 *p++ = cpu_to_be32(seek->seek_eof);
3808 p = xdr_encode_hyper(p, seek->seek_pos);
3809
3810 return nfserr;
3811}
3812
3813static __be32
Benny Halevy695e12f2008-07-04 14:38:33 +03003814nfsd4_encode_noop(struct nfsd4_compoundres *resp, __be32 nfserr, void *p)
3815{
3816 return nfserr;
3817}
3818
3819typedef __be32(* nfsd4_enc)(struct nfsd4_compoundres *, __be32, void *);
3820
Andy Adamson2db134e2009-04-03 08:27:55 +03003821/*
3822 * Note: nfsd4_enc_ops vector is shared for v4.0 and v4.1
3823 * since we don't need to filter out obsolete ops as this is
3824 * done in the decoding phase.
3825 */
Benny Halevy695e12f2008-07-04 14:38:33 +03003826static nfsd4_enc nfsd4_enc_ops[] = {
J. Bruce Fieldsad1060c2008-07-18 15:04:16 -04003827 [OP_ACCESS] = (nfsd4_enc)nfsd4_encode_access,
3828 [OP_CLOSE] = (nfsd4_enc)nfsd4_encode_close,
3829 [OP_COMMIT] = (nfsd4_enc)nfsd4_encode_commit,
3830 [OP_CREATE] = (nfsd4_enc)nfsd4_encode_create,
3831 [OP_DELEGPURGE] = (nfsd4_enc)nfsd4_encode_noop,
3832 [OP_DELEGRETURN] = (nfsd4_enc)nfsd4_encode_noop,
3833 [OP_GETATTR] = (nfsd4_enc)nfsd4_encode_getattr,
3834 [OP_GETFH] = (nfsd4_enc)nfsd4_encode_getfh,
3835 [OP_LINK] = (nfsd4_enc)nfsd4_encode_link,
3836 [OP_LOCK] = (nfsd4_enc)nfsd4_encode_lock,
3837 [OP_LOCKT] = (nfsd4_enc)nfsd4_encode_lockt,
3838 [OP_LOCKU] = (nfsd4_enc)nfsd4_encode_locku,
3839 [OP_LOOKUP] = (nfsd4_enc)nfsd4_encode_noop,
3840 [OP_LOOKUPP] = (nfsd4_enc)nfsd4_encode_noop,
3841 [OP_NVERIFY] = (nfsd4_enc)nfsd4_encode_noop,
3842 [OP_OPEN] = (nfsd4_enc)nfsd4_encode_open,
Benny Halevy84f09f42009-03-04 23:05:35 +02003843 [OP_OPENATTR] = (nfsd4_enc)nfsd4_encode_noop,
J. Bruce Fieldsad1060c2008-07-18 15:04:16 -04003844 [OP_OPEN_CONFIRM] = (nfsd4_enc)nfsd4_encode_open_confirm,
3845 [OP_OPEN_DOWNGRADE] = (nfsd4_enc)nfsd4_encode_open_downgrade,
3846 [OP_PUTFH] = (nfsd4_enc)nfsd4_encode_noop,
3847 [OP_PUTPUBFH] = (nfsd4_enc)nfsd4_encode_noop,
3848 [OP_PUTROOTFH] = (nfsd4_enc)nfsd4_encode_noop,
3849 [OP_READ] = (nfsd4_enc)nfsd4_encode_read,
3850 [OP_READDIR] = (nfsd4_enc)nfsd4_encode_readdir,
3851 [OP_READLINK] = (nfsd4_enc)nfsd4_encode_readlink,
3852 [OP_REMOVE] = (nfsd4_enc)nfsd4_encode_remove,
3853 [OP_RENAME] = (nfsd4_enc)nfsd4_encode_rename,
3854 [OP_RENEW] = (nfsd4_enc)nfsd4_encode_noop,
3855 [OP_RESTOREFH] = (nfsd4_enc)nfsd4_encode_noop,
3856 [OP_SAVEFH] = (nfsd4_enc)nfsd4_encode_noop,
3857 [OP_SECINFO] = (nfsd4_enc)nfsd4_encode_secinfo,
3858 [OP_SETATTR] = (nfsd4_enc)nfsd4_encode_setattr,
3859 [OP_SETCLIENTID] = (nfsd4_enc)nfsd4_encode_setclientid,
3860 [OP_SETCLIENTID_CONFIRM] = (nfsd4_enc)nfsd4_encode_noop,
3861 [OP_VERIFY] = (nfsd4_enc)nfsd4_encode_noop,
3862 [OP_WRITE] = (nfsd4_enc)nfsd4_encode_write,
3863 [OP_RELEASE_LOCKOWNER] = (nfsd4_enc)nfsd4_encode_noop,
Andy Adamson2db134e2009-04-03 08:27:55 +03003864
3865 /* NFSv4.1 operations */
3866 [OP_BACKCHANNEL_CTL] = (nfsd4_enc)nfsd4_encode_noop,
J. Bruce Fields1d1bc8f2010-10-04 23:12:59 -04003867 [OP_BIND_CONN_TO_SESSION] = (nfsd4_enc)nfsd4_encode_bind_conn_to_session,
Andy Adamson2db134e2009-04-03 08:27:55 +03003868 [OP_EXCHANGE_ID] = (nfsd4_enc)nfsd4_encode_exchange_id,
3869 [OP_CREATE_SESSION] = (nfsd4_enc)nfsd4_encode_create_session,
Kinglong Mee43212cc2013-12-09 19:04:23 +08003870 [OP_DESTROY_SESSION] = (nfsd4_enc)nfsd4_encode_noop,
3871 [OP_FREE_STATEID] = (nfsd4_enc)nfsd4_encode_noop,
Andy Adamson2db134e2009-04-03 08:27:55 +03003872 [OP_GET_DIR_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop,
3873 [OP_GETDEVICEINFO] = (nfsd4_enc)nfsd4_encode_noop,
3874 [OP_GETDEVICELIST] = (nfsd4_enc)nfsd4_encode_noop,
3875 [OP_LAYOUTCOMMIT] = (nfsd4_enc)nfsd4_encode_noop,
3876 [OP_LAYOUTGET] = (nfsd4_enc)nfsd4_encode_noop,
3877 [OP_LAYOUTRETURN] = (nfsd4_enc)nfsd4_encode_noop,
Mi Jinlong22b6dee2010-12-27 14:29:57 +08003878 [OP_SECINFO_NO_NAME] = (nfsd4_enc)nfsd4_encode_secinfo_no_name,
Andy Adamson2db134e2009-04-03 08:27:55 +03003879 [OP_SEQUENCE] = (nfsd4_enc)nfsd4_encode_sequence,
3880 [OP_SET_SSV] = (nfsd4_enc)nfsd4_encode_noop,
Bryan Schumaker17456802011-07-13 10:50:48 -04003881 [OP_TEST_STATEID] = (nfsd4_enc)nfsd4_encode_test_stateid,
Andy Adamson2db134e2009-04-03 08:27:55 +03003882 [OP_WANT_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop,
3883 [OP_DESTROY_CLIENTID] = (nfsd4_enc)nfsd4_encode_noop,
3884 [OP_RECLAIM_COMPLETE] = (nfsd4_enc)nfsd4_encode_noop,
Anna Schumaker87a15a82014-09-26 13:58:26 -04003885
3886 /* NFSv4.2 operations */
3887 [OP_ALLOCATE] = (nfsd4_enc)nfsd4_encode_noop,
3888 [OP_COPY] = (nfsd4_enc)nfsd4_encode_noop,
3889 [OP_COPY_NOTIFY] = (nfsd4_enc)nfsd4_encode_noop,
3890 [OP_DEALLOCATE] = (nfsd4_enc)nfsd4_encode_noop,
3891 [OP_IO_ADVISE] = (nfsd4_enc)nfsd4_encode_noop,
3892 [OP_LAYOUTERROR] = (nfsd4_enc)nfsd4_encode_noop,
3893 [OP_LAYOUTSTATS] = (nfsd4_enc)nfsd4_encode_noop,
3894 [OP_OFFLOAD_CANCEL] = (nfsd4_enc)nfsd4_encode_noop,
3895 [OP_OFFLOAD_STATUS] = (nfsd4_enc)nfsd4_encode_noop,
3896 [OP_READ_PLUS] = (nfsd4_enc)nfsd4_encode_noop,
Anna Schumaker24bab492014-09-26 13:58:27 -04003897 [OP_SEEK] = (nfsd4_enc)nfsd4_encode_seek,
Anna Schumaker87a15a82014-09-26 13:58:26 -04003898 [OP_WRITE_SAME] = (nfsd4_enc)nfsd4_encode_noop,
Benny Halevy695e12f2008-07-04 14:38:33 +03003899};
3900
Andy Adamson496c2622009-04-03 08:28:48 +03003901/*
J. Bruce Fieldsa8095f72014-03-11 17:54:34 -04003902 * Calculate whether we still have space to encode repsize bytes.
3903 * There are two considerations:
3904 * - For NFS versions >=4.1, the size of the reply must stay within
3905 * session limits
3906 * - For all NFS versions, we must stay within limited preallocated
3907 * buffer space.
Andy Adamson496c2622009-04-03 08:28:48 +03003908 *
J. Bruce Fieldsa8095f72014-03-11 17:54:34 -04003909 * This is called before the operation is processed, so can only provide
3910 * an upper estimate. For some nonidempotent operations (such as
3911 * getattr), it's not necessarily a problem if that estimate is wrong,
3912 * as we can fail it after processing without significant side effects.
Andy Adamson496c2622009-04-03 08:28:48 +03003913 */
J. Bruce Fieldsa8095f72014-03-11 17:54:34 -04003914__be32 nfsd4_check_resp_size(struct nfsd4_compoundres *resp, u32 respsize)
Andy Adamson496c2622009-04-03 08:28:48 +03003915{
J. Bruce Fields67492c92014-03-08 16:42:05 -05003916 struct xdr_buf *buf = &resp->rqstp->rq_res;
J. Bruce Fields47ee5292014-03-12 21:39:35 -04003917 struct nfsd4_slot *slot = resp->cstate.slot;
Andy Adamson496c2622009-04-03 08:28:48 +03003918
J. Bruce Fields47ee5292014-03-12 21:39:35 -04003919 if (buf->len + respsize <= buf->buflen)
3920 return nfs_ok;
3921 if (!nfsd4_has_session(&resp->cstate))
J. Bruce Fieldsea8d7722014-03-08 17:19:55 -05003922 return nfserr_resource;
J. Bruce Fields47ee5292014-03-12 21:39:35 -04003923 if (slot->sl_flags & NFSD4_SLOT_CACHETHIS) {
3924 WARN_ON_ONCE(1);
3925 return nfserr_rep_too_big_to_cache;
J. Bruce Fieldsea8d7722014-03-08 17:19:55 -05003926 }
J. Bruce Fields47ee5292014-03-12 21:39:35 -04003927 return nfserr_rep_too_big;
Andy Adamson496c2622009-04-03 08:28:48 +03003928}
3929
Linus Torvalds1da177e2005-04-16 15:20:36 -07003930void
3931nfsd4_encode_operation(struct nfsd4_compoundres *resp, struct nfsd4_op *op)
3932{
J. Bruce Fields082d4bd2013-08-29 15:42:52 -04003933 struct xdr_stream *xdr = &resp->xdr;
J. Bruce Fields9411b1d2013-04-01 16:37:12 -04003934 struct nfs4_stateowner *so = resp->cstate.replay_owner;
J. Bruce Fields5f4ab942014-03-07 11:01:37 -05003935 struct svc_rqst *rqstp = resp->rqstp;
J. Bruce Fields082d4bd2013-08-29 15:42:52 -04003936 int post_err_offset;
J. Bruce Fields07d1f802014-03-06 20:39:29 -05003937 nfsd4_enc encoder;
J. Bruce Fieldsbc749ca2009-04-07 16:55:27 -07003938 __be32 *p;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003939
J. Bruce Fieldsd0a381d2014-01-30 17:18:38 -05003940 p = xdr_reserve_space(xdr, 8);
3941 if (!p) {
3942 WARN_ON_ONCE(1);
3943 return;
3944 }
J. Bruce Fieldsc373b0a2014-03-22 17:09:18 -04003945 *p++ = cpu_to_be32(op->opnum);
J. Bruce Fields082d4bd2013-08-29 15:42:52 -04003946 post_err_offset = xdr->buf->len;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003947
Benny Halevy695e12f2008-07-04 14:38:33 +03003948 if (op->opnum == OP_ILLEGAL)
3949 goto status;
3950 BUG_ON(op->opnum < 0 || op->opnum >= ARRAY_SIZE(nfsd4_enc_ops) ||
3951 !nfsd4_enc_ops[op->opnum]);
J. Bruce Fields07d1f802014-03-06 20:39:29 -05003952 encoder = nfsd4_enc_ops[op->opnum];
3953 op->status = encoder(resp, op->status, &op->u);
J. Bruce Fields2825a7f2013-08-26 16:04:46 -04003954 xdr_commit_encode(xdr);
3955
J. Bruce Fields067e1ac2014-03-21 17:26:44 -04003956 /* nfsd4_check_resp_size guarantees enough room for error status */
J. Bruce Fields5f4ab942014-03-07 11:01:37 -05003957 if (!op->status) {
3958 int space_needed = 0;
3959 if (!nfsd4_last_compound_op(rqstp))
3960 space_needed = COMPOUND_ERR_SLACK_SPACE;
3961 op->status = nfsd4_check_resp_size(resp, space_needed);
3962 }
J. Bruce Fieldsc8f13d92014-05-08 17:38:18 -04003963 if (op->status == nfserr_resource && nfsd4_has_session(&resp->cstate)) {
3964 struct nfsd4_slot *slot = resp->cstate.slot;
3965
3966 if (slot->sl_flags & NFSD4_SLOT_CACHETHIS)
3967 op->status = nfserr_rep_too_big_to_cache;
3968 else
3969 op->status = nfserr_rep_too_big;
3970 }
J. Bruce Fields07d1f802014-03-06 20:39:29 -05003971 if (op->status == nfserr_resource ||
3972 op->status == nfserr_rep_too_big ||
3973 op->status == nfserr_rep_too_big_to_cache) {
3974 /*
3975 * The operation may have already been encoded or
3976 * partially encoded. No op returns anything additional
3977 * in the case of one of these three errors, so we can
3978 * just truncate back to after the status. But it's a
3979 * bug if we had to do this on a non-idempotent op:
3980 */
3981 warn_on_nonidempotent_op(op);
J. Bruce Fields082d4bd2013-08-29 15:42:52 -04003982 xdr_truncate_encode(xdr, post_err_offset);
J. Bruce Fields07d1f802014-03-06 20:39:29 -05003983 }
J. Bruce Fields9411b1d2013-04-01 16:37:12 -04003984 if (so) {
J. Bruce Fields082d4bd2013-08-29 15:42:52 -04003985 int len = xdr->buf->len - post_err_offset;
3986
J. Bruce Fields9411b1d2013-04-01 16:37:12 -04003987 so->so_replay.rp_status = op->status;
J. Bruce Fields082d4bd2013-08-29 15:42:52 -04003988 so->so_replay.rp_buflen = len;
3989 read_bytes_from_xdr_buf(xdr->buf, post_err_offset,
3990 so->so_replay.rp_buf, len);
J. Bruce Fields9411b1d2013-04-01 16:37:12 -04003991 }
Benny Halevy695e12f2008-07-04 14:38:33 +03003992status:
J. Bruce Fields082d4bd2013-08-29 15:42:52 -04003993 /* Note that op->status is already in network byte order: */
3994 write_bytes_to_xdr_buf(xdr->buf, post_err_offset - 4, &op->status, 4);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003995}
3996
3997/*
3998 * Encode the reply stored in the stateowner reply cache
3999 *
4000 * XDR note: do not encode rp->rp_buflen: the buffer contains the
4001 * previously sent already encoded operation.
Linus Torvalds1da177e2005-04-16 15:20:36 -07004002 */
4003void
J. Bruce Fieldsd0a381d2014-01-30 17:18:38 -05004004nfsd4_encode_replay(struct xdr_stream *xdr, struct nfsd4_op *op)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004005{
J. Bruce Fieldsbc749ca2009-04-07 16:55:27 -07004006 __be32 *p;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004007 struct nfs4_replay *rp = op->replay;
4008
4009 BUG_ON(!rp);
4010
J. Bruce Fieldsd0a381d2014-01-30 17:18:38 -05004011 p = xdr_reserve_space(xdr, 8 + rp->rp_buflen);
4012 if (!p) {
4013 WARN_ON_ONCE(1);
4014 return;
4015 }
J. Bruce Fieldsc373b0a2014-03-22 17:09:18 -04004016 *p++ = cpu_to_be32(op->opnum);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004017 *p++ = rp->rp_status; /* already xdr'ed */
Linus Torvalds1da177e2005-04-16 15:20:36 -07004018
J. Bruce Fields0c0c2672014-03-22 18:43:16 -04004019 p = xdr_encode_opaque_fixed(p, rp->rp_buf, rp->rp_buflen);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004020}
4021
Linus Torvalds1da177e2005-04-16 15:20:36 -07004022int
Al Viro2ebbc012006-10-19 23:28:58 -07004023nfs4svc_encode_voidres(struct svc_rqst *rqstp, __be32 *p, void *dummy)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004024{
4025 return xdr_ressize_check(rqstp, p);
4026}
4027
J. Bruce Fields3e98abf2011-07-16 17:15:10 -04004028int nfsd4_release_compoundargs(void *rq, __be32 *p, void *resp)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004029{
J. Bruce Fields3e98abf2011-07-16 17:15:10 -04004030 struct svc_rqst *rqstp = rq;
4031 struct nfsd4_compoundargs *args = rqstp->rq_argp;
4032
Linus Torvalds1da177e2005-04-16 15:20:36 -07004033 if (args->ops != args->iops) {
4034 kfree(args->ops);
4035 args->ops = args->iops;
4036 }
Jesper Juhlf99d49a2005-11-07 01:01:34 -08004037 kfree(args->tmpp);
4038 args->tmpp = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004039 while (args->to_free) {
J. Bruce Fieldsd5e23382014-06-24 17:43:45 -04004040 struct svcxdr_tmpbuf *tb = args->to_free;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004041 args->to_free = tb->next;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004042 kfree(tb);
4043 }
J. Bruce Fields3e98abf2011-07-16 17:15:10 -04004044 return 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004045}
4046
4047int
Al Viro2ebbc012006-10-19 23:28:58 -07004048nfs4svc_decode_compoundargs(struct svc_rqst *rqstp, __be32 *p, struct nfsd4_compoundargs *args)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004049{
Jeff Laytone874f9f2014-03-10 11:34:55 -04004050 if (rqstp->rq_arg.head[0].iov_len % 4) {
4051 /* client is nuts */
4052 dprintk("%s: compound not properly padded! (peeraddr=%pISc xid=0x%x)",
4053 __func__, svc_addr(rqstp), be32_to_cpu(rqstp->rq_xid));
4054 return 0;
4055 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07004056 args->p = p;
4057 args->end = rqstp->rq_arg.head[0].iov_base + rqstp->rq_arg.head[0].iov_len;
4058 args->pagelist = rqstp->rq_arg.pages;
4059 args->pagelen = rqstp->rq_arg.page_len;
4060 args->tmpp = NULL;
4061 args->to_free = NULL;
4062 args->ops = args->iops;
4063 args->rqstp = rqstp;
4064
J. Bruce Fields3e98abf2011-07-16 17:15:10 -04004065 return !nfsd4_decode_compound(args);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004066}
4067
4068int
Al Viro2ebbc012006-10-19 23:28:58 -07004069nfs4svc_encode_compoundres(struct svc_rqst *rqstp, __be32 *p, struct nfsd4_compoundres *resp)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004070{
4071 /*
4072 * All that remains is to write the tag and operation count...
4073 */
J. Bruce Fields6ac90392014-02-26 17:39:35 -05004074 struct xdr_buf *buf = resp->xdr.buf;
4075
4076 WARN_ON_ONCE(buf->len != buf->head[0].iov_len + buf->page_len +
4077 buf->tail[0].iov_len);
J. Bruce Fieldsdd97fdd2014-02-26 17:16:27 -05004078
J. Bruce Fields2825a7f2013-08-26 16:04:46 -04004079 rqstp->rq_next_page = resp->xdr.page_ptr + 1;
4080
Linus Torvalds1da177e2005-04-16 15:20:36 -07004081 p = resp->tagp;
4082 *p++ = htonl(resp->taglen);
4083 memcpy(p, resp->tag, resp->taglen);
4084 p += XDR_QUADLEN(resp->taglen);
4085 *p++ = htonl(resp->opcnt);
4086
Trond Myklebustb6076642014-06-30 11:48:35 -04004087 nfsd4_sequence_done(resp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004088 return 1;
4089}
4090
4091/*
4092 * Local variables:
4093 * c-basic-offset: 8
4094 * End:
4095 */