blob: 418fa9c78186b6b6f5d36ced347d1255ce2505fe [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
Linus Torvalds1da177e2005-04-16 15:20:36 -07002 * Server-side XDR for NFSv4
3 *
4 * Copyright (c) 2002 The Regents of the University of Michigan.
5 * All rights reserved.
6 *
7 * Kendrick Smith <kmsmith@umich.edu>
8 * Andy Adamson <andros@umich.edu>
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 *
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in the
18 * documentation and/or other materials provided with the distribution.
19 * 3. Neither the name of the University nor the names of its
20 * contributors may be used to endorse or promote products derived
21 * from this software without specific prior written permission.
22 *
23 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
24 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
25 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
26 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
28 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
29 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
30 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
31 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
32 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
33 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
Linus Torvalds1da177e2005-04-16 15:20:36 -070034 */
35
Christoph Hellwig96bcad52015-06-18 16:45:01 +020036#include <linux/file.h>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090037#include <linux/slab.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070038#include <linux/namei.h>
Boaz Harrosh341eb182009-12-03 20:29:12 +020039#include <linux/statfs.h>
Andy Adamson0733d212009-04-03 08:28:01 +030040#include <linux/utsname.h>
Bryan Schumaker17456802011-07-13 10:50:48 -040041#include <linux/pagemap.h>
J. Bruce Fields4796f452007-07-17 04:04:51 -070042#include <linux/sunrpc/svcauth_gss.h>
Boaz Harrosh9a74af22009-12-03 20:30:56 +020043
J. Bruce Fields2ca72e12011-01-04 17:37:15 -050044#include "idmap.h"
45#include "acl.h"
Boaz Harrosh9a74af22009-12-03 20:30:56 +020046#include "xdr4.h"
J. Bruce Fields0a3adad2009-11-04 18:12:35 -050047#include "vfs.h"
Bryan Schumaker17456802011-07-13 10:50:48 -040048#include "state.h"
J. Bruce Fields10910062011-01-24 12:11:02 -050049#include "cache.h"
Stanislav Kinsbursky3d733712012-11-27 14:11:44 +030050#include "netns.h"
Christoph Hellwig9cf514c2014-05-05 13:11:59 +020051#include "pnfs.h"
J. Bruce Fields2ca72e12011-01-04 17:37:15 -050052
David Quigley18032ca2013-05-02 13:19:10 -040053#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
54#include <linux/security.h>
55#endif
56
57
Linus Torvalds1da177e2005-04-16 15:20:36 -070058#define NFSDDBG_FACILITY NFSDDBG_XDR
59
J. Bruce Fields5cf23db2017-01-11 20:40:36 -050060const u32 nfsd_suppattrs[3][3] = {
J. Bruce Fields916d2d82016-10-18 14:18:40 -040061 {NFSD4_SUPPORTED_ATTRS_WORD0,
62 NFSD4_SUPPORTED_ATTRS_WORD1,
63 NFSD4_SUPPORTED_ATTRS_WORD2},
64
65 {NFSD4_1_SUPPORTED_ATTRS_WORD0,
66 NFSD4_1_SUPPORTED_ATTRS_WORD1,
67 NFSD4_1_SUPPORTED_ATTRS_WORD2},
68
69 {NFSD4_1_SUPPORTED_ATTRS_WORD0,
70 NFSD4_1_SUPPORTED_ATTRS_WORD1,
71 NFSD4_2_SUPPORTED_ATTRS_WORD2},
72};
73
J.Bruce Fields42ca0992006-10-04 02:16:20 -070074/*
75 * As per referral draft, the fsid for a referral MUST be different from the fsid of the containing
76 * directory in order to indicate to the client that a filesystem boundary is present
77 * We use a fixed fsid for a referral
78 */
79#define NFS4_REFERRAL_FSID_MAJOR 0x8000000ULL
80#define NFS4_REFERRAL_FSID_MINOR 0x8000000ULL
81
Al Virob37ad282006-10-19 23:28:59 -070082static __be32
J. Bruce Fieldsa36b1722012-11-25 16:31:00 -050083check_filename(char *str, int len)
Linus Torvalds1da177e2005-04-16 15:20:36 -070084{
85 int i;
86
87 if (len == 0)
88 return nfserr_inval;
89 if (isdotent(str, len))
J. Bruce Fieldsa36b1722012-11-25 16:31:00 -050090 return nfserr_badname;
Linus Torvalds1da177e2005-04-16 15:20:36 -070091 for (i = 0; i < len; i++)
92 if (str[i] == '/')
J. Bruce Fieldsa36b1722012-11-25 16:31:00 -050093 return nfserr_badname;
Linus Torvalds1da177e2005-04-16 15:20:36 -070094 return 0;
95}
96
Linus Torvalds1da177e2005-04-16 15:20:36 -070097#define DECODE_HEAD \
Al Viro2ebbc012006-10-19 23:28:58 -070098 __be32 *p; \
Al Virob37ad282006-10-19 23:28:59 -070099 __be32 status
Linus Torvalds1da177e2005-04-16 15:20:36 -0700100#define DECODE_TAIL \
101 status = 0; \
102out: \
103 return status; \
104xdr_error: \
Chuck Lever817cb9d2007-09-11 18:01:20 -0400105 dprintk("NFSD: xdr error (%s:%d)\n", \
106 __FILE__, __LINE__); \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700107 status = nfserr_bad_xdr; \
108 goto out
109
Linus Torvalds1da177e2005-04-16 15:20:36 -0700110#define READMEM(x,nbytes) do { \
111 x = (char *)p; \
112 p += XDR_QUADLEN(nbytes); \
113} while (0)
114#define SAVEMEM(x,nbytes) do { \
115 if (!(x = (p==argp->tmp || p == argp->tmpp) ? \
116 savemem(argp, p, nbytes) : \
117 (char *)p)) { \
Chuck Lever817cb9d2007-09-11 18:01:20 -0400118 dprintk("NFSD: xdr error (%s:%d)\n", \
119 __FILE__, __LINE__); \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700120 goto xdr_error; \
121 } \
122 p += XDR_QUADLEN(nbytes); \
123} while (0)
124#define COPYMEM(x,nbytes) do { \
125 memcpy((x), p, nbytes); \
126 p += XDR_QUADLEN(nbytes); \
127} while (0)
128
129/* READ_BUF, read_buf(): nbytes must be <= PAGE_SIZE */
130#define READ_BUF(nbytes) do { \
131 if (nbytes <= (u32)((char *)argp->end - (char *)argp->p)) { \
132 p = argp->p; \
133 argp->p += XDR_QUADLEN(nbytes); \
134 } else if (!(p = read_buf(argp, nbytes))) { \
Chuck Lever817cb9d2007-09-11 18:01:20 -0400135 dprintk("NFSD: xdr error (%s:%d)\n", \
136 __FILE__, __LINE__); \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700137 goto xdr_error; \
138 } \
139} while (0)
140
J. Bruce Fields590b7432013-06-21 17:06:29 -0400141static void next_decode_page(struct nfsd4_compoundargs *argp)
142{
J. Bruce Fields590b7432013-06-21 17:06:29 -0400143 argp->p = page_address(argp->pagelist[0]);
J. Bruce Fields365da4a2013-11-19 17:32:43 -0500144 argp->pagelist++;
J. Bruce Fields590b7432013-06-21 17:06:29 -0400145 if (argp->pagelen < PAGE_SIZE) {
Chuck Leverfc788f62017-08-18 11:12:19 -0400146 argp->end = argp->p + XDR_QUADLEN(argp->pagelen);
J. Bruce Fields590b7432013-06-21 17:06:29 -0400147 argp->pagelen = 0;
148 } else {
149 argp->end = argp->p + (PAGE_SIZE>>2);
150 argp->pagelen -= PAGE_SIZE;
151 }
152}
153
J. Bruce Fieldsca2a05a2007-11-11 15:43:12 -0500154static __be32 *read_buf(struct nfsd4_compoundargs *argp, u32 nbytes)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700155{
156 /* We want more bytes than seem to be available.
157 * Maybe we need a new page, maybe we have just run out
158 */
J. Bruce Fieldsca2a05a2007-11-11 15:43:12 -0500159 unsigned int avail = (char *)argp->end - (char *)argp->p;
Al Viro2ebbc012006-10-19 23:28:58 -0700160 __be32 *p;
Chuck Levereae03e22017-08-18 11:12:27 -0400161
162 if (argp->pagelen == 0) {
163 struct kvec *vec = &argp->rqstp->rq_arg.tail[0];
164
165 if (!argp->tail) {
166 argp->tail = true;
167 avail = vec->iov_len;
168 argp->p = vec->iov_base;
169 argp->end = vec->iov_base + avail;
170 }
171
172 if (avail < nbytes)
173 return NULL;
174
175 p = argp->p;
176 argp->p += XDR_QUADLEN(nbytes);
177 return p;
178 }
179
Linus Torvalds1da177e2005-04-16 15:20:36 -0700180 if (avail + argp->pagelen < nbytes)
181 return NULL;
182 if (avail + PAGE_SIZE < nbytes) /* need more than a page !! */
183 return NULL;
184 /* ok, we can do it with the current plus the next page */
185 if (nbytes <= sizeof(argp->tmp))
186 p = argp->tmp;
187 else {
Jesper Juhlf99d49a2005-11-07 01:01:34 -0800188 kfree(argp->tmpp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700189 p = argp->tmpp = kmalloc(nbytes, GFP_KERNEL);
190 if (!p)
191 return NULL;
192
193 }
J. Bruce Fieldsca2a05a2007-11-11 15:43:12 -0500194 /*
195 * The following memcpy is safe because read_buf is always
196 * called with nbytes > avail, and the two cases above both
197 * guarantee p points to at least nbytes bytes.
198 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700199 memcpy(p, argp->p, avail);
J. Bruce Fields590b7432013-06-21 17:06:29 -0400200 next_decode_page(argp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700201 memcpy(((char*)p)+avail, argp->p, (nbytes - avail));
202 argp->p += XDR_QUADLEN(nbytes - avail);
203 return p;
204}
205
Andy Adamson60adfc52009-04-03 08:28:50 +0300206static int zero_clientid(clientid_t *clid)
207{
208 return (clid->cl_boot == 0) && (clid->cl_id == 0);
209}
210
Christoph Hellwig2d8498d2013-11-20 00:24:11 -0800211/**
J. Bruce Fieldsd5e23382014-06-24 17:43:45 -0400212 * svcxdr_tmpalloc - allocate memory to be freed after compound processing
J. Bruce Fieldsce043ac2014-06-24 16:51:12 -0400213 * @argp: NFSv4 compound argument structure
214 * @p: pointer to be freed (with kfree())
Christoph Hellwig2d8498d2013-11-20 00:24:11 -0800215 *
216 * Marks @p to be freed when processing the compound operation
217 * described in @argp finishes.
218 */
J. Bruce Fieldsd5e23382014-06-24 17:43:45 -0400219static void *
220svcxdr_tmpalloc(struct nfsd4_compoundargs *argp, u32 len)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700221{
J. Bruce Fieldsd5e23382014-06-24 17:43:45 -0400222 struct svcxdr_tmpbuf *tb;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700223
J. Bruce Fieldsd5e23382014-06-24 17:43:45 -0400224 tb = kmalloc(sizeof(*tb) + len, GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700225 if (!tb)
J. Bruce Fieldsd5e23382014-06-24 17:43:45 -0400226 return NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700227 tb->next = argp->to_free;
228 argp->to_free = tb;
J. Bruce Fieldsd5e23382014-06-24 17:43:45 -0400229 return tb->buf;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700230}
231
J. Bruce Fields29c353b2014-06-24 17:06:51 -0400232/*
233 * For xdr strings that need to be passed to other kernel api's
234 * as null-terminated strings.
235 *
236 * Note null-terminating in place usually isn't safe since the
237 * buffer might end on a page boundary.
238 */
239static char *
240svcxdr_dupstr(struct nfsd4_compoundargs *argp, void *buf, u32 len)
241{
J. Bruce Fieldsd5e23382014-06-24 17:43:45 -0400242 char *p = svcxdr_tmpalloc(argp, len + 1);
J. Bruce Fields29c353b2014-06-24 17:06:51 -0400243
244 if (!p)
245 return NULL;
246 memcpy(p, buf, len);
247 p[len] = '\0';
J. Bruce Fields29c353b2014-06-24 17:06:51 -0400248 return p;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700249}
250
Christoph Hellwig2d8498d2013-11-20 00:24:11 -0800251/**
252 * savemem - duplicate a chunk of memory for later processing
253 * @argp: NFSv4 compound argument structure to be freed with
254 * @p: pointer to be duplicated
255 * @nbytes: length to be duplicated
256 *
257 * Returns a pointer to a copy of @nbytes bytes of memory at @p
258 * that are preserved until processing of the NFSv4 compound
259 * operation described by @argp finishes.
260 */
Al Viro2ebbc012006-10-19 23:28:58 -0700261static char *savemem(struct nfsd4_compoundargs *argp, __be32 *p, int nbytes)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700262{
J. Bruce Fieldsd5e23382014-06-24 17:43:45 -0400263 void *ret;
264
265 ret = svcxdr_tmpalloc(argp, nbytes);
266 if (!ret)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700267 return NULL;
J. Bruce Fieldsd5e23382014-06-24 17:43:45 -0400268 memcpy(ret, p, nbytes);
269 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700270}
271
Christoph Hellwig4c94e132015-01-22 12:09:50 +0100272/*
273 * We require the high 32 bits of 'seconds' to be 0, and
274 * we ignore all 32 bits of 'nseconds'.
275 */
276static __be32
277nfsd4_decode_time(struct nfsd4_compoundargs *argp, struct timespec *tv)
278{
279 DECODE_HEAD;
280 u64 sec;
281
282 READ_BUF(12);
283 p = xdr_decode_hyper(p, &sec);
284 tv->tv_sec = sec;
285 tv->tv_nsec = be32_to_cpup(p++);
286 if (tv->tv_nsec >= (u32)1000000000)
287 return nfserr_inval;
288
289 DECODE_TAIL;
290}
291
Al Virob37ad282006-10-19 23:28:59 -0700292static __be32
Linus Torvalds1da177e2005-04-16 15:20:36 -0700293nfsd4_decode_bitmap(struct nfsd4_compoundargs *argp, u32 *bmval)
294{
295 u32 bmlen;
296 DECODE_HEAD;
297
298 bmval[0] = 0;
299 bmval[1] = 0;
Andy Adamson7e705702009-04-03 08:29:11 +0300300 bmval[2] = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700301
302 READ_BUF(4);
J. Bruce Fields06553992014-06-02 12:32:51 -0400303 bmlen = be32_to_cpup(p++);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700304 if (bmlen > 1000)
305 goto xdr_error;
306
307 READ_BUF(bmlen << 2);
308 if (bmlen > 0)
J. Bruce Fields06553992014-06-02 12:32:51 -0400309 bmval[0] = be32_to_cpup(p++);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700310 if (bmlen > 1)
J. Bruce Fields06553992014-06-02 12:32:51 -0400311 bmval[1] = be32_to_cpup(p++);
Andy Adamson7e705702009-04-03 08:29:11 +0300312 if (bmlen > 2)
J. Bruce Fields06553992014-06-02 12:32:51 -0400313 bmval[2] = be32_to_cpup(p++);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700314
315 DECODE_TAIL;
316}
317
Al Virob37ad282006-10-19 23:28:59 -0700318static __be32
Yu Zhiguo3c8e0312009-05-16 16:22:31 +0800319nfsd4_decode_fattr(struct nfsd4_compoundargs *argp, u32 *bmval,
David Quigley18032ca2013-05-02 13:19:10 -0400320 struct iattr *iattr, struct nfs4_acl **acl,
Andreas Gruenbacher47057ab2016-01-12 20:24:14 +0100321 struct xdr_netobj *label, int *umask)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700322{
Deepa Dinamani95582b02018-05-08 19:36:02 -0700323 struct timespec ts;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700324 int expected_len, len = 0;
325 u32 dummy32;
326 char *buf;
327
328 DECODE_HEAD;
329 iattr->ia_valid = 0;
330 if ((status = nfsd4_decode_bitmap(argp, bmval)))
331 return status;
332
J. Bruce Fieldse864c182016-06-10 16:56:05 -0400333 if (bmval[0] & ~NFSD_WRITEABLE_ATTRS_WORD0
334 || bmval[1] & ~NFSD_WRITEABLE_ATTRS_WORD1
335 || bmval[2] & ~NFSD_WRITEABLE_ATTRS_WORD2) {
336 if (nfsd_attrs_supported(argp->minorversion, bmval))
337 return nfserr_inval;
338 return nfserr_attrnotsupp;
339 }
340
Linus Torvalds1da177e2005-04-16 15:20:36 -0700341 READ_BUF(4);
J. Bruce Fields06553992014-06-02 12:32:51 -0400342 expected_len = be32_to_cpup(p++);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700343
344 if (bmval[0] & FATTR4_WORD0_SIZE) {
345 READ_BUF(8);
346 len += 8;
J. Bruce Fields542d1ab2014-06-02 12:45:31 -0400347 p = xdr_decode_hyper(p, &iattr->ia_size);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700348 iattr->ia_valid |= ATTR_SIZE;
349 }
350 if (bmval[0] & FATTR4_WORD0_ACL) {
J. Bruce Fields64a817c2013-03-26 14:11:13 -0400351 u32 nace;
J. Bruce Fields28e05dd2007-02-16 01:28:30 -0800352 struct nfs4_ace *ace;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700353
354 READ_BUF(4); len += 4;
J. Bruce Fields06553992014-06-02 12:32:51 -0400355 nace = be32_to_cpup(p++);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700356
J. Bruce Fields28e05dd2007-02-16 01:28:30 -0800357 if (nace > NFS4_ACL_MAX)
J. Bruce Fields798df332014-01-29 16:39:05 -0500358 return nfserr_fbig;
J. Bruce Fields28e05dd2007-02-16 01:28:30 -0800359
J. Bruce Fieldsd5e23382014-06-24 17:43:45 -0400360 *acl = svcxdr_tmpalloc(argp, nfs4_acl_bytes(nace));
Kinglong Meeeba1c992013-12-09 18:23:46 +0800361 if (*acl == NULL)
362 return nfserr_jukebox;
363
J. Bruce Fields28e05dd2007-02-16 01:28:30 -0800364 (*acl)->naces = nace;
365 for (ace = (*acl)->aces; ace < (*acl)->aces + nace; ace++) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700366 READ_BUF(16); len += 16;
J. Bruce Fields06553992014-06-02 12:32:51 -0400367 ace->type = be32_to_cpup(p++);
368 ace->flag = be32_to_cpup(p++);
369 ace->access_mask = be32_to_cpup(p++);
370 dummy32 = be32_to_cpup(p++);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700371 READ_BUF(dummy32);
372 len += XDR_QUADLEN(dummy32) << 2;
373 READMEM(buf, dummy32);
J. Bruce Fields28e05dd2007-02-16 01:28:30 -0800374 ace->whotype = nfs4_acl_get_whotype(buf, dummy32);
J. Bruce Fields3c726022011-01-04 17:53:52 -0500375 status = nfs_ok;
J. Bruce Fields28e05dd2007-02-16 01:28:30 -0800376 if (ace->whotype != NFS4_ACL_WHO_NAMED)
Eric W. Biedermanab8e4ae2013-02-02 05:18:08 -0800377 ;
J. Bruce Fields28e05dd2007-02-16 01:28:30 -0800378 else if (ace->flag & NFS4_ACE_IDENTIFIER_GROUP)
J. Bruce Fields3c726022011-01-04 17:53:52 -0500379 status = nfsd_map_name_to_gid(argp->rqstp,
Eric W. Biedermanab8e4ae2013-02-02 05:18:08 -0800380 buf, dummy32, &ace->who_gid);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700381 else
J. Bruce Fields3c726022011-01-04 17:53:52 -0500382 status = nfsd_map_name_to_uid(argp->rqstp,
Eric W. Biedermanab8e4ae2013-02-02 05:18:08 -0800383 buf, dummy32, &ace->who_uid);
J. Bruce Fields3c726022011-01-04 17:53:52 -0500384 if (status)
385 return status;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700386 }
387 } else
388 *acl = NULL;
389 if (bmval[1] & FATTR4_WORD1_MODE) {
390 READ_BUF(4);
391 len += 4;
J. Bruce Fields06553992014-06-02 12:32:51 -0400392 iattr->ia_mode = be32_to_cpup(p++);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700393 iattr->ia_mode &= (S_IFMT | S_IALLUGO);
394 iattr->ia_valid |= ATTR_MODE;
395 }
396 if (bmval[1] & FATTR4_WORD1_OWNER) {
397 READ_BUF(4);
398 len += 4;
J. Bruce Fields06553992014-06-02 12:32:51 -0400399 dummy32 = be32_to_cpup(p++);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700400 READ_BUF(dummy32);
401 len += (XDR_QUADLEN(dummy32) << 2);
402 READMEM(buf, dummy32);
NeilBrown47c85292011-02-16 13:08:35 +1100403 if ((status = nfsd_map_name_to_uid(argp->rqstp, buf, dummy32, &iattr->ia_uid)))
404 return status;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700405 iattr->ia_valid |= ATTR_UID;
406 }
407 if (bmval[1] & FATTR4_WORD1_OWNER_GROUP) {
408 READ_BUF(4);
409 len += 4;
J. Bruce Fields06553992014-06-02 12:32:51 -0400410 dummy32 = be32_to_cpup(p++);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700411 READ_BUF(dummy32);
412 len += (XDR_QUADLEN(dummy32) << 2);
413 READMEM(buf, dummy32);
NeilBrown47c85292011-02-16 13:08:35 +1100414 if ((status = nfsd_map_name_to_gid(argp->rqstp, buf, dummy32, &iattr->ia_gid)))
415 return status;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700416 iattr->ia_valid |= ATTR_GID;
417 }
418 if (bmval[1] & FATTR4_WORD1_TIME_ACCESS_SET) {
419 READ_BUF(4);
420 len += 4;
J. Bruce Fields06553992014-06-02 12:32:51 -0400421 dummy32 = be32_to_cpup(p++);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700422 switch (dummy32) {
423 case NFS4_SET_TO_CLIENT_TIME:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700424 len += 12;
Deepa Dinamani95582b02018-05-08 19:36:02 -0700425 status = nfsd4_decode_time(argp, &ts);
426 iattr->ia_atime = timespec_to_timespec64(ts);
Christoph Hellwig4c94e132015-01-22 12:09:50 +0100427 if (status)
428 return status;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700429 iattr->ia_valid |= (ATTR_ATIME | ATTR_ATIME_SET);
430 break;
431 case NFS4_SET_TO_SERVER_TIME:
432 iattr->ia_valid |= ATTR_ATIME;
433 break;
434 default:
435 goto xdr_error;
436 }
437 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700438 if (bmval[1] & FATTR4_WORD1_TIME_MODIFY_SET) {
439 READ_BUF(4);
440 len += 4;
J. Bruce Fields06553992014-06-02 12:32:51 -0400441 dummy32 = be32_to_cpup(p++);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700442 switch (dummy32) {
443 case NFS4_SET_TO_CLIENT_TIME:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700444 len += 12;
Deepa Dinamani95582b02018-05-08 19:36:02 -0700445 status = nfsd4_decode_time(argp, &ts);
446 iattr->ia_mtime = timespec_to_timespec64(ts);
Christoph Hellwig4c94e132015-01-22 12:09:50 +0100447 if (status)
448 return status;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700449 iattr->ia_valid |= (ATTR_MTIME | ATTR_MTIME_SET);
450 break;
451 case NFS4_SET_TO_SERVER_TIME:
452 iattr->ia_valid |= ATTR_MTIME;
453 break;
454 default:
455 goto xdr_error;
456 }
457 }
David Quigley18032ca2013-05-02 13:19:10 -0400458
459 label->len = 0;
Arnd Bergmann2285ae72018-01-22 22:09:12 +0100460 if (IS_ENABLED(CONFIG_NFSD_V4_SECURITY_LABEL) &&
461 bmval[2] & FATTR4_WORD2_SECURITY_LABEL) {
David Quigley18032ca2013-05-02 13:19:10 -0400462 READ_BUF(4);
463 len += 4;
J. Bruce Fields06553992014-06-02 12:32:51 -0400464 dummy32 = be32_to_cpup(p++); /* lfs: we don't use it */
David Quigley18032ca2013-05-02 13:19:10 -0400465 READ_BUF(4);
466 len += 4;
J. Bruce Fields06553992014-06-02 12:32:51 -0400467 dummy32 = be32_to_cpup(p++); /* pi: we don't use it either */
David Quigley18032ca2013-05-02 13:19:10 -0400468 READ_BUF(4);
469 len += 4;
J. Bruce Fields06553992014-06-02 12:32:51 -0400470 dummy32 = be32_to_cpup(p++);
David Quigley18032ca2013-05-02 13:19:10 -0400471 READ_BUF(dummy32);
Kinglong Mee1ec8c0c2015-03-28 23:46:09 +0800472 if (dummy32 > NFS4_MAXLABELLEN)
David Quigley18032ca2013-05-02 13:19:10 -0400473 return nfserr_badlabel;
474 len += (XDR_QUADLEN(dummy32) << 2);
475 READMEM(buf, dummy32);
J. Bruce Fields29c353b2014-06-24 17:06:51 -0400476 label->len = dummy32;
477 label->data = svcxdr_dupstr(argp, buf, dummy32);
David Quigley18032ca2013-05-02 13:19:10 -0400478 if (!label->data)
479 return nfserr_jukebox;
David Quigley18032ca2013-05-02 13:19:10 -0400480 }
Andreas Gruenbacher47057ab2016-01-12 20:24:14 +0100481 if (bmval[2] & FATTR4_WORD2_MODE_UMASK) {
482 if (!umask)
483 goto xdr_error;
484 READ_BUF(8);
485 len += 8;
486 dummy32 = be32_to_cpup(p++);
487 iattr->ia_mode = dummy32 & (S_IFMT | S_IALLUGO);
488 dummy32 = be32_to_cpup(p++);
489 *umask = dummy32 & S_IRWXUGO;
490 iattr->ia_valid |= ATTR_MODE;
491 }
J. Bruce Fieldse864c182016-06-10 16:56:05 -0400492 if (len != expected_len)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700493 goto xdr_error;
494
495 DECODE_TAIL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700496}
497
Al Virob37ad282006-10-19 23:28:59 -0700498static __be32
Benny Halevye31a1b62008-08-12 20:46:18 +0300499nfsd4_decode_stateid(struct nfsd4_compoundargs *argp, stateid_t *sid)
500{
501 DECODE_HEAD;
502
503 READ_BUF(sizeof(stateid_t));
J. Bruce Fields06553992014-06-02 12:32:51 -0400504 sid->si_generation = be32_to_cpup(p++);
Benny Halevye31a1b62008-08-12 20:46:18 +0300505 COPYMEM(&sid->si_opaque, sizeof(stateid_opaque_t));
506
507 DECODE_TAIL;
508}
509
510static __be32
Linus Torvalds1da177e2005-04-16 15:20:36 -0700511nfsd4_decode_access(struct nfsd4_compoundargs *argp, struct nfsd4_access *access)
512{
513 DECODE_HEAD;
514
515 READ_BUF(4);
J. Bruce Fields06553992014-06-02 12:32:51 -0400516 access->ac_req_access = be32_to_cpup(p++);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700517
518 DECODE_TAIL;
519}
520
J. Bruce Fieldsacb28872012-03-27 14:50:26 -0400521static __be32 nfsd4_decode_cb_sec(struct nfsd4_compoundargs *argp, struct nfsd4_cb_sec *cbs)
522{
523 DECODE_HEAD;
J. Bruce Fields12fc3e92012-11-05 16:01:48 -0500524 u32 dummy, uid, gid;
J. Bruce Fieldsacb28872012-03-27 14:50:26 -0400525 char *machine_name;
526 int i;
527 int nr_secflavs;
528
529 /* callback_sec_params4 */
530 READ_BUF(4);
J. Bruce Fields06553992014-06-02 12:32:51 -0400531 nr_secflavs = be32_to_cpup(p++);
J. Bruce Fields57569a72013-05-17 16:25:32 -0400532 if (nr_secflavs)
533 cbs->flavor = (u32)(-1);
534 else
535 /* Is this legal? Be generous, take it to mean AUTH_NONE: */
536 cbs->flavor = 0;
J. Bruce Fieldsacb28872012-03-27 14:50:26 -0400537 for (i = 0; i < nr_secflavs; ++i) {
538 READ_BUF(4);
J. Bruce Fields06553992014-06-02 12:32:51 -0400539 dummy = be32_to_cpup(p++);
J. Bruce Fieldsacb28872012-03-27 14:50:26 -0400540 switch (dummy) {
541 case RPC_AUTH_NULL:
542 /* Nothing to read */
J. Bruce Fields12fc3e92012-11-05 16:01:48 -0500543 if (cbs->flavor == (u32)(-1))
544 cbs->flavor = RPC_AUTH_NULL;
J. Bruce Fieldsacb28872012-03-27 14:50:26 -0400545 break;
546 case RPC_AUTH_UNIX:
547 READ_BUF(8);
548 /* stamp */
J. Bruce Fields06553992014-06-02 12:32:51 -0400549 dummy = be32_to_cpup(p++);
J. Bruce Fieldsacb28872012-03-27 14:50:26 -0400550
551 /* machine name */
J. Bruce Fields06553992014-06-02 12:32:51 -0400552 dummy = be32_to_cpup(p++);
J. Bruce Fieldsacb28872012-03-27 14:50:26 -0400553 READ_BUF(dummy);
554 SAVEMEM(machine_name, dummy);
555
556 /* uid, gid */
557 READ_BUF(8);
J. Bruce Fields06553992014-06-02 12:32:51 -0400558 uid = be32_to_cpup(p++);
559 gid = be32_to_cpup(p++);
J. Bruce Fieldsacb28872012-03-27 14:50:26 -0400560
561 /* more gids */
562 READ_BUF(4);
J. Bruce Fields06553992014-06-02 12:32:51 -0400563 dummy = be32_to_cpup(p++);
J. Bruce Fieldsacb28872012-03-27 14:50:26 -0400564 READ_BUF(dummy * 4);
J. Bruce Fields12fc3e92012-11-05 16:01:48 -0500565 if (cbs->flavor == (u32)(-1)) {
Eric W. Biederman03bc6d12013-02-02 06:24:49 -0800566 kuid_t kuid = make_kuid(&init_user_ns, uid);
567 kgid_t kgid = make_kgid(&init_user_ns, gid);
568 if (uid_valid(kuid) && gid_valid(kgid)) {
569 cbs->uid = kuid;
570 cbs->gid = kgid;
571 cbs->flavor = RPC_AUTH_UNIX;
572 } else {
573 dprintk("RPC_AUTH_UNIX with invalid"
574 "uid or gid ignoring!\n");
575 }
J. Bruce Fields12fc3e92012-11-05 16:01:48 -0500576 }
J. Bruce Fieldsacb28872012-03-27 14:50:26 -0400577 break;
578 case RPC_AUTH_GSS:
579 dprintk("RPC_AUTH_GSS callback secflavor "
580 "not supported!\n");
581 READ_BUF(8);
582 /* gcbp_service */
J. Bruce Fields06553992014-06-02 12:32:51 -0400583 dummy = be32_to_cpup(p++);
J. Bruce Fieldsacb28872012-03-27 14:50:26 -0400584 /* gcbp_handle_from_server */
J. Bruce Fields06553992014-06-02 12:32:51 -0400585 dummy = be32_to_cpup(p++);
J. Bruce Fieldsacb28872012-03-27 14:50:26 -0400586 READ_BUF(dummy);
587 p += XDR_QUADLEN(dummy);
588 /* gcbp_handle_from_client */
589 READ_BUF(4);
J. Bruce Fields06553992014-06-02 12:32:51 -0400590 dummy = be32_to_cpup(p++);
J. Bruce Fieldsacb28872012-03-27 14:50:26 -0400591 READ_BUF(dummy);
592 break;
593 default:
594 dprintk("Illegal callback secflavor\n");
595 return nfserr_inval;
596 }
597 }
598 DECODE_TAIL;
599}
600
J. Bruce Fieldscb73a9f2012-11-01 18:09:48 -0400601static __be32 nfsd4_decode_backchannel_ctl(struct nfsd4_compoundargs *argp, struct nfsd4_backchannel_ctl *bc)
602{
603 DECODE_HEAD;
604
605 READ_BUF(4);
J. Bruce Fields06553992014-06-02 12:32:51 -0400606 bc->bc_cb_program = be32_to_cpup(p++);
J. Bruce Fieldscb73a9f2012-11-01 18:09:48 -0400607 nfsd4_decode_cb_sec(argp, &bc->bc_cb_sec);
608
609 DECODE_TAIL;
610}
611
J. Bruce Fields1d1bc8f2010-10-04 23:12:59 -0400612static __be32 nfsd4_decode_bind_conn_to_session(struct nfsd4_compoundargs *argp, struct nfsd4_bind_conn_to_session *bcts)
613{
614 DECODE_HEAD;
J. Bruce Fields1d1bc8f2010-10-04 23:12:59 -0400615
616 READ_BUF(NFS4_MAX_SESSIONID_LEN + 8);
617 COPYMEM(bcts->sessionid.data, NFS4_MAX_SESSIONID_LEN);
J. Bruce Fields06553992014-06-02 12:32:51 -0400618 bcts->dir = be32_to_cpup(p++);
Bryan Schumaker6ce23572011-04-27 15:47:16 -0400619 /* XXX: skipping ctsa_use_conn_in_rdma_mode. Perhaps Tom Tucker
620 * could help us figure out we should be using it. */
J. Bruce Fields1d1bc8f2010-10-04 23:12:59 -0400621 DECODE_TAIL;
622}
623
Al Virob37ad282006-10-19 23:28:59 -0700624static __be32
Linus Torvalds1da177e2005-04-16 15:20:36 -0700625nfsd4_decode_close(struct nfsd4_compoundargs *argp, struct nfsd4_close *close)
626{
627 DECODE_HEAD;
628
Benny Halevye31a1b62008-08-12 20:46:18 +0300629 READ_BUF(4);
J. Bruce Fields06553992014-06-02 12:32:51 -0400630 close->cl_seqid = be32_to_cpup(p++);
Benny Halevye31a1b62008-08-12 20:46:18 +0300631 return nfsd4_decode_stateid(argp, &close->cl_stateid);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700632
633 DECODE_TAIL;
634}
635
636
Al Virob37ad282006-10-19 23:28:59 -0700637static __be32
Linus Torvalds1da177e2005-04-16 15:20:36 -0700638nfsd4_decode_commit(struct nfsd4_compoundargs *argp, struct nfsd4_commit *commit)
639{
640 DECODE_HEAD;
641
642 READ_BUF(12);
J. Bruce Fields542d1ab2014-06-02 12:45:31 -0400643 p = xdr_decode_hyper(p, &commit->co_offset);
J. Bruce Fields06553992014-06-02 12:32:51 -0400644 commit->co_count = be32_to_cpup(p++);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700645
646 DECODE_TAIL;
647}
648
Al Virob37ad282006-10-19 23:28:59 -0700649static __be32
Linus Torvalds1da177e2005-04-16 15:20:36 -0700650nfsd4_decode_create(struct nfsd4_compoundargs *argp, struct nfsd4_create *create)
651{
652 DECODE_HEAD;
653
654 READ_BUF(4);
J. Bruce Fields06553992014-06-02 12:32:51 -0400655 create->cr_type = be32_to_cpup(p++);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700656 switch (create->cr_type) {
657 case NF4LNK:
658 READ_BUF(4);
J. Bruce Fields7fb84302014-06-24 15:06:41 -0400659 create->cr_datalen = be32_to_cpup(p++);
660 READ_BUF(create->cr_datalen);
J. Bruce Fields29c353b2014-06-24 17:06:51 -0400661 create->cr_data = svcxdr_dupstr(argp, p, create->cr_datalen);
J. Bruce Fields7fb84302014-06-24 15:06:41 -0400662 if (!create->cr_data)
J. Bruce Fields76f471282014-06-19 16:44:48 -0400663 return nfserr_jukebox;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700664 break;
665 case NF4BLK:
666 case NF4CHR:
667 READ_BUF(8);
J. Bruce Fields06553992014-06-02 12:32:51 -0400668 create->cr_specdata1 = be32_to_cpup(p++);
669 create->cr_specdata2 = be32_to_cpup(p++);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700670 break;
671 case NF4SOCK:
672 case NF4FIFO:
673 case NF4DIR:
674 default:
675 break;
676 }
677
678 READ_BUF(4);
J. Bruce Fields06553992014-06-02 12:32:51 -0400679 create->cr_namelen = be32_to_cpup(p++);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700680 READ_BUF(create->cr_namelen);
681 SAVEMEM(create->cr_name, create->cr_namelen);
J. Bruce Fieldsa36b1722012-11-25 16:31:00 -0500682 if ((status = check_filename(create->cr_name, create->cr_namelen)))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700683 return status;
684
Yu Zhiguo3c8e0312009-05-16 16:22:31 +0800685 status = nfsd4_decode_fattr(argp, create->cr_bmval, &create->cr_iattr,
Andreas Gruenbacher47057ab2016-01-12 20:24:14 +0100686 &create->cr_acl, &create->cr_label,
J. Bruce Fields880a3a52018-03-21 17:19:02 -0400687 &create->cr_umask);
Benny Halevyc0d6fc82009-04-03 08:29:05 +0300688 if (status)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700689 goto out;
690
691 DECODE_TAIL;
692}
693
Al Virob37ad282006-10-19 23:28:59 -0700694static inline __be32
Linus Torvalds1da177e2005-04-16 15:20:36 -0700695nfsd4_decode_delegreturn(struct nfsd4_compoundargs *argp, struct nfsd4_delegreturn *dr)
696{
Benny Halevye31a1b62008-08-12 20:46:18 +0300697 return nfsd4_decode_stateid(argp, &dr->dr_stateid);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700698}
699
Al Virob37ad282006-10-19 23:28:59 -0700700static inline __be32
Linus Torvalds1da177e2005-04-16 15:20:36 -0700701nfsd4_decode_getattr(struct nfsd4_compoundargs *argp, struct nfsd4_getattr *getattr)
702{
703 return nfsd4_decode_bitmap(argp, getattr->ga_bmval);
704}
705
Al Virob37ad282006-10-19 23:28:59 -0700706static __be32
Linus Torvalds1da177e2005-04-16 15:20:36 -0700707nfsd4_decode_link(struct nfsd4_compoundargs *argp, struct nfsd4_link *link)
708{
709 DECODE_HEAD;
710
711 READ_BUF(4);
J. Bruce Fields06553992014-06-02 12:32:51 -0400712 link->li_namelen = be32_to_cpup(p++);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700713 READ_BUF(link->li_namelen);
714 SAVEMEM(link->li_name, link->li_namelen);
J. Bruce Fieldsa36b1722012-11-25 16:31:00 -0500715 if ((status = check_filename(link->li_name, link->li_namelen)))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700716 return status;
717
718 DECODE_TAIL;
719}
720
Al Virob37ad282006-10-19 23:28:59 -0700721static __be32
Linus Torvalds1da177e2005-04-16 15:20:36 -0700722nfsd4_decode_lock(struct nfsd4_compoundargs *argp, struct nfsd4_lock *lock)
723{
724 DECODE_HEAD;
725
Linus Torvalds1da177e2005-04-16 15:20:36 -0700726 /*
727 * type, reclaim(boolean), offset, length, new_lock_owner(boolean)
728 */
729 READ_BUF(28);
J. Bruce Fields06553992014-06-02 12:32:51 -0400730 lock->lk_type = be32_to_cpup(p++);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700731 if ((lock->lk_type < NFS4_READ_LT) || (lock->lk_type > NFS4_WRITEW_LT))
732 goto xdr_error;
J. Bruce Fields06553992014-06-02 12:32:51 -0400733 lock->lk_reclaim = be32_to_cpup(p++);
J. Bruce Fields542d1ab2014-06-02 12:45:31 -0400734 p = xdr_decode_hyper(p, &lock->lk_offset);
735 p = xdr_decode_hyper(p, &lock->lk_length);
J. Bruce Fields06553992014-06-02 12:32:51 -0400736 lock->lk_is_new = be32_to_cpup(p++);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700737
738 if (lock->lk_is_new) {
Benny Halevye31a1b62008-08-12 20:46:18 +0300739 READ_BUF(4);
J. Bruce Fields06553992014-06-02 12:32:51 -0400740 lock->lk_new_open_seqid = be32_to_cpup(p++);
Benny Halevye31a1b62008-08-12 20:46:18 +0300741 status = nfsd4_decode_stateid(argp, &lock->lk_new_open_stateid);
742 if (status)
743 return status;
744 READ_BUF(8 + sizeof(clientid_t));
J. Bruce Fields06553992014-06-02 12:32:51 -0400745 lock->lk_new_lock_seqid = be32_to_cpup(p++);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700746 COPYMEM(&lock->lk_new_clientid, sizeof(clientid_t));
J. Bruce Fields06553992014-06-02 12:32:51 -0400747 lock->lk_new_owner.len = be32_to_cpup(p++);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700748 READ_BUF(lock->lk_new_owner.len);
749 READMEM(lock->lk_new_owner.data, lock->lk_new_owner.len);
750 } else {
Benny Halevye31a1b62008-08-12 20:46:18 +0300751 status = nfsd4_decode_stateid(argp, &lock->lk_old_lock_stateid);
752 if (status)
753 return status;
754 READ_BUF(4);
J. Bruce Fields06553992014-06-02 12:32:51 -0400755 lock->lk_old_lock_seqid = be32_to_cpup(p++);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700756 }
757
758 DECODE_TAIL;
759}
760
Al Virob37ad282006-10-19 23:28:59 -0700761static __be32
Linus Torvalds1da177e2005-04-16 15:20:36 -0700762nfsd4_decode_lockt(struct nfsd4_compoundargs *argp, struct nfsd4_lockt *lockt)
763{
764 DECODE_HEAD;
765
766 READ_BUF(32);
J. Bruce Fields06553992014-06-02 12:32:51 -0400767 lockt->lt_type = be32_to_cpup(p++);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700768 if((lockt->lt_type < NFS4_READ_LT) || (lockt->lt_type > NFS4_WRITEW_LT))
769 goto xdr_error;
J. Bruce Fields542d1ab2014-06-02 12:45:31 -0400770 p = xdr_decode_hyper(p, &lockt->lt_offset);
771 p = xdr_decode_hyper(p, &lockt->lt_length);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700772 COPYMEM(&lockt->lt_clientid, 8);
J. Bruce Fields06553992014-06-02 12:32:51 -0400773 lockt->lt_owner.len = be32_to_cpup(p++);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700774 READ_BUF(lockt->lt_owner.len);
775 READMEM(lockt->lt_owner.data, lockt->lt_owner.len);
776
777 DECODE_TAIL;
778}
779
Al Virob37ad282006-10-19 23:28:59 -0700780static __be32
Linus Torvalds1da177e2005-04-16 15:20:36 -0700781nfsd4_decode_locku(struct nfsd4_compoundargs *argp, struct nfsd4_locku *locku)
782{
783 DECODE_HEAD;
784
Benny Halevye31a1b62008-08-12 20:46:18 +0300785 READ_BUF(8);
J. Bruce Fields06553992014-06-02 12:32:51 -0400786 locku->lu_type = be32_to_cpup(p++);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700787 if ((locku->lu_type < NFS4_READ_LT) || (locku->lu_type > NFS4_WRITEW_LT))
788 goto xdr_error;
J. Bruce Fields06553992014-06-02 12:32:51 -0400789 locku->lu_seqid = be32_to_cpup(p++);
Benny Halevye31a1b62008-08-12 20:46:18 +0300790 status = nfsd4_decode_stateid(argp, &locku->lu_stateid);
791 if (status)
792 return status;
793 READ_BUF(16);
J. Bruce Fields542d1ab2014-06-02 12:45:31 -0400794 p = xdr_decode_hyper(p, &locku->lu_offset);
795 p = xdr_decode_hyper(p, &locku->lu_length);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700796
797 DECODE_TAIL;
798}
799
Al Virob37ad282006-10-19 23:28:59 -0700800static __be32
Linus Torvalds1da177e2005-04-16 15:20:36 -0700801nfsd4_decode_lookup(struct nfsd4_compoundargs *argp, struct nfsd4_lookup *lookup)
802{
803 DECODE_HEAD;
804
805 READ_BUF(4);
J. Bruce Fields06553992014-06-02 12:32:51 -0400806 lookup->lo_len = be32_to_cpup(p++);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700807 READ_BUF(lookup->lo_len);
808 SAVEMEM(lookup->lo_name, lookup->lo_len);
J. Bruce Fieldsa36b1722012-11-25 16:31:00 -0500809 if ((status = check_filename(lookup->lo_name, lookup->lo_len)))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700810 return status;
811
812 DECODE_TAIL;
813}
814
Benny Halevy2c8bd7e2012-02-16 20:57:09 +0200815static __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 -0400816{
817 __be32 *p;
818 u32 w;
819
820 READ_BUF(4);
J. Bruce Fields06553992014-06-02 12:32:51 -0400821 w = be32_to_cpup(p++);
Benny Halevy2c8bd7e2012-02-16 20:57:09 +0200822 *share_access = w & NFS4_SHARE_ACCESS_MASK;
823 *deleg_want = w & NFS4_SHARE_WANT_MASK;
824 if (deleg_when)
825 *deleg_when = w & NFS4_SHARE_WHEN_MASK;
826
J. Bruce Fields04f9e662011-10-10 14:37:13 -0400827 switch (w & NFS4_SHARE_ACCESS_MASK) {
828 case NFS4_SHARE_ACCESS_READ:
829 case NFS4_SHARE_ACCESS_WRITE:
830 case NFS4_SHARE_ACCESS_BOTH:
831 break;
832 default:
833 return nfserr_bad_xdr;
834 }
Benny Halevyfc0d14f2011-10-27 20:43:01 +0200835 w &= ~NFS4_SHARE_ACCESS_MASK;
J. Bruce Fields04f9e662011-10-10 14:37:13 -0400836 if (!w)
837 return nfs_ok;
838 if (!argp->minorversion)
839 return nfserr_bad_xdr;
840 switch (w & NFS4_SHARE_WANT_MASK) {
841 case NFS4_SHARE_WANT_NO_PREFERENCE:
842 case NFS4_SHARE_WANT_READ_DELEG:
843 case NFS4_SHARE_WANT_WRITE_DELEG:
844 case NFS4_SHARE_WANT_ANY_DELEG:
845 case NFS4_SHARE_WANT_NO_DELEG:
846 case NFS4_SHARE_WANT_CANCEL:
847 break;
848 default:
849 return nfserr_bad_xdr;
850 }
Benny Halevy92bac8c2011-10-19 19:13:29 -0700851 w &= ~NFS4_SHARE_WANT_MASK;
J. Bruce Fields04f9e662011-10-10 14:37:13 -0400852 if (!w)
853 return nfs_ok;
Benny Halevy2c8bd7e2012-02-16 20:57:09 +0200854
855 if (!deleg_when) /* open_downgrade */
856 return nfserr_inval;
J. Bruce Fields04f9e662011-10-10 14:37:13 -0400857 switch (w) {
858 case NFS4_SHARE_SIGNAL_DELEG_WHEN_RESRC_AVAIL:
859 case NFS4_SHARE_PUSH_DELEG_WHEN_UNCONTENDED:
Benny Halevyc668fc62011-10-19 19:13:13 -0700860 case (NFS4_SHARE_SIGNAL_DELEG_WHEN_RESRC_AVAIL |
861 NFS4_SHARE_PUSH_DELEG_WHEN_UNCONTENDED):
J. Bruce Fields04f9e662011-10-10 14:37:13 -0400862 return nfs_ok;
863 }
864xdr_error:
865 return nfserr_bad_xdr;
866}
867
868static __be32 nfsd4_decode_share_deny(struct nfsd4_compoundargs *argp, u32 *x)
869{
870 __be32 *p;
871
872 READ_BUF(4);
J. Bruce Fields06553992014-06-02 12:32:51 -0400873 *x = be32_to_cpup(p++);
J. Bruce Fields04f9e662011-10-10 14:37:13 -0400874 /* Note: unlinke access bits, deny bits may be zero. */
Dan Carpenter01cd4af2011-10-17 10:41:17 +0300875 if (*x & ~NFS4_SHARE_DENY_BOTH)
J. Bruce Fields04f9e662011-10-10 14:37:13 -0400876 return nfserr_bad_xdr;
877 return nfs_ok;
878xdr_error:
879 return nfserr_bad_xdr;
880}
881
J. Bruce Fieldsa084daf2011-10-10 15:07:40 -0400882static __be32 nfsd4_decode_opaque(struct nfsd4_compoundargs *argp, struct xdr_netobj *o)
883{
884 __be32 *p;
885
886 READ_BUF(4);
J. Bruce Fields06553992014-06-02 12:32:51 -0400887 o->len = be32_to_cpup(p++);
J. Bruce Fieldsa084daf2011-10-10 15:07:40 -0400888
889 if (o->len == 0 || o->len > NFS4_OPAQUE_LIMIT)
890 return nfserr_bad_xdr;
891
892 READ_BUF(o->len);
893 SAVEMEM(o->data, o->len);
894 return nfs_ok;
895xdr_error:
896 return nfserr_bad_xdr;
897}
898
Al Virob37ad282006-10-19 23:28:59 -0700899static __be32
Linus Torvalds1da177e2005-04-16 15:20:36 -0700900nfsd4_decode_open(struct nfsd4_compoundargs *argp, struct nfsd4_open *open)
901{
902 DECODE_HEAD;
Benny Halevy2c8bd7e2012-02-16 20:57:09 +0200903 u32 dummy;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700904
905 memset(open->op_bmval, 0, sizeof(open->op_bmval));
906 open->op_iattr.ia_valid = 0;
J. Bruce Fieldsfe0750e2011-07-30 23:33:59 -0400907 open->op_openowner = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700908
J. Bruce Fields9d313b12013-02-28 12:51:49 -0800909 open->op_xdr_error = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700910 /* seqid, share_access, share_deny, clientid, ownerlen */
J. Bruce Fields04f9e662011-10-10 14:37:13 -0400911 READ_BUF(4);
J. Bruce Fields06553992014-06-02 12:32:51 -0400912 open->op_seqid = be32_to_cpup(p++);
Benny Halevy2c8bd7e2012-02-16 20:57:09 +0200913 /* decode, yet ignore deleg_when until supported */
914 status = nfsd4_decode_share_access(argp, &open->op_share_access,
915 &open->op_deleg_want, &dummy);
J. Bruce Fields04f9e662011-10-10 14:37:13 -0400916 if (status)
917 goto xdr_error;
918 status = nfsd4_decode_share_deny(argp, &open->op_share_deny);
919 if (status)
920 goto xdr_error;
J. Bruce Fieldsa084daf2011-10-10 15:07:40 -0400921 READ_BUF(sizeof(clientid_t));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700922 COPYMEM(&open->op_clientid, sizeof(clientid_t));
J. Bruce Fieldsa084daf2011-10-10 15:07:40 -0400923 status = nfsd4_decode_opaque(argp, &open->op_owner);
924 if (status)
925 goto xdr_error;
926 READ_BUF(4);
J. Bruce Fields06553992014-06-02 12:32:51 -0400927 open->op_create = be32_to_cpup(p++);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700928 switch (open->op_create) {
929 case NFS4_OPEN_NOCREATE:
930 break;
931 case NFS4_OPEN_CREATE:
932 READ_BUF(4);
J. Bruce Fields06553992014-06-02 12:32:51 -0400933 open->op_createmode = be32_to_cpup(p++);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700934 switch (open->op_createmode) {
935 case NFS4_CREATE_UNCHECKED:
936 case NFS4_CREATE_GUARDED:
Benny Halevyc0d6fc82009-04-03 08:29:05 +0300937 status = nfsd4_decode_fattr(argp, open->op_bmval,
Andreas Gruenbacher47057ab2016-01-12 20:24:14 +0100938 &open->op_iattr, &open->op_acl, &open->op_label,
J. Bruce Fields880a3a52018-03-21 17:19:02 -0400939 &open->op_umask);
Benny Halevyc0d6fc82009-04-03 08:29:05 +0300940 if (status)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700941 goto out;
942 break;
943 case NFS4_CREATE_EXCLUSIVE:
Chuck Leverab4684d2012-03-02 17:13:50 -0500944 READ_BUF(NFS4_VERIFIER_SIZE);
945 COPYMEM(open->op_verf.data, NFS4_VERIFIER_SIZE);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700946 break;
Benny Halevy79fb54a2009-04-03 08:29:17 +0300947 case NFS4_CREATE_EXCLUSIVE4_1:
948 if (argp->minorversion < 1)
949 goto xdr_error;
Chuck Leverab4684d2012-03-02 17:13:50 -0500950 READ_BUF(NFS4_VERIFIER_SIZE);
951 COPYMEM(open->op_verf.data, NFS4_VERIFIER_SIZE);
Benny Halevy79fb54a2009-04-03 08:29:17 +0300952 status = nfsd4_decode_fattr(argp, open->op_bmval,
Andreas Gruenbacher47057ab2016-01-12 20:24:14 +0100953 &open->op_iattr, &open->op_acl, &open->op_label,
J. Bruce Fields880a3a52018-03-21 17:19:02 -0400954 &open->op_umask);
Benny Halevy79fb54a2009-04-03 08:29:17 +0300955 if (status)
956 goto out;
957 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700958 default:
959 goto xdr_error;
960 }
961 break;
962 default:
963 goto xdr_error;
964 }
965
966 /* open_claim */
967 READ_BUF(4);
J. Bruce Fields06553992014-06-02 12:32:51 -0400968 open->op_claim_type = be32_to_cpup(p++);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700969 switch (open->op_claim_type) {
970 case NFS4_OPEN_CLAIM_NULL:
971 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
972 READ_BUF(4);
J. Bruce Fields06553992014-06-02 12:32:51 -0400973 open->op_fname.len = be32_to_cpup(p++);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700974 READ_BUF(open->op_fname.len);
975 SAVEMEM(open->op_fname.data, open->op_fname.len);
J. Bruce Fieldsa36b1722012-11-25 16:31:00 -0500976 if ((status = check_filename(open->op_fname.data, open->op_fname.len)))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700977 return status;
978 break;
979 case NFS4_OPEN_CLAIM_PREVIOUS:
980 READ_BUF(4);
J. Bruce Fields06553992014-06-02 12:32:51 -0400981 open->op_delegate_type = be32_to_cpup(p++);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700982 break;
983 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
Benny Halevye31a1b62008-08-12 20:46:18 +0300984 status = nfsd4_decode_stateid(argp, &open->op_delegate_stateid);
985 if (status)
986 return status;
987 READ_BUF(4);
J. Bruce Fields06553992014-06-02 12:32:51 -0400988 open->op_fname.len = be32_to_cpup(p++);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700989 READ_BUF(open->op_fname.len);
990 SAVEMEM(open->op_fname.data, open->op_fname.len);
J. Bruce Fieldsa36b1722012-11-25 16:31:00 -0500991 if ((status = check_filename(open->op_fname.data, open->op_fname.len)))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700992 return status;
993 break;
J. Bruce Fields8b289b22011-10-19 11:52:12 -0400994 case NFS4_OPEN_CLAIM_FH:
995 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
996 if (argp->minorversion < 1)
997 goto xdr_error;
998 /* void */
999 break;
1000 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1001 if (argp->minorversion < 1)
1002 goto xdr_error;
1003 status = nfsd4_decode_stateid(argp, &open->op_delegate_stateid);
1004 if (status)
1005 return status;
1006 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001007 default:
1008 goto xdr_error;
1009 }
1010
1011 DECODE_TAIL;
1012}
1013
Al Virob37ad282006-10-19 23:28:59 -07001014static __be32
Linus Torvalds1da177e2005-04-16 15:20:36 -07001015nfsd4_decode_open_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_open_confirm *open_conf)
1016{
1017 DECODE_HEAD;
Anna Schumakere1a90eb2013-10-30 10:00:20 -04001018
1019 if (argp->minorversion >= 1)
1020 return nfserr_notsupp;
1021
Benny Halevye31a1b62008-08-12 20:46:18 +03001022 status = nfsd4_decode_stateid(argp, &open_conf->oc_req_stateid);
1023 if (status)
1024 return status;
1025 READ_BUF(4);
J. Bruce Fields06553992014-06-02 12:32:51 -04001026 open_conf->oc_seqid = be32_to_cpup(p++);
Anna Schumakere1a90eb2013-10-30 10:00:20 -04001027
Linus Torvalds1da177e2005-04-16 15:20:36 -07001028 DECODE_TAIL;
1029}
1030
Al Virob37ad282006-10-19 23:28:59 -07001031static __be32
Linus Torvalds1da177e2005-04-16 15:20:36 -07001032nfsd4_decode_open_downgrade(struct nfsd4_compoundargs *argp, struct nfsd4_open_downgrade *open_down)
1033{
1034 DECODE_HEAD;
1035
Benny Halevye31a1b62008-08-12 20:46:18 +03001036 status = nfsd4_decode_stateid(argp, &open_down->od_stateid);
1037 if (status)
1038 return status;
J. Bruce Fields04f9e662011-10-10 14:37:13 -04001039 READ_BUF(4);
J. Bruce Fields06553992014-06-02 12:32:51 -04001040 open_down->od_seqid = be32_to_cpup(p++);
Benny Halevy2c8bd7e2012-02-16 20:57:09 +02001041 status = nfsd4_decode_share_access(argp, &open_down->od_share_access,
1042 &open_down->od_deleg_want, NULL);
J. Bruce Fields04f9e662011-10-10 14:37:13 -04001043 if (status)
1044 return status;
1045 status = nfsd4_decode_share_deny(argp, &open_down->od_share_deny);
1046 if (status)
1047 return status;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001048 DECODE_TAIL;
1049}
1050
Al Virob37ad282006-10-19 23:28:59 -07001051static __be32
Linus Torvalds1da177e2005-04-16 15:20:36 -07001052nfsd4_decode_putfh(struct nfsd4_compoundargs *argp, struct nfsd4_putfh *putfh)
1053{
1054 DECODE_HEAD;
1055
1056 READ_BUF(4);
J. Bruce Fields06553992014-06-02 12:32:51 -04001057 putfh->pf_fhlen = be32_to_cpup(p++);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001058 if (putfh->pf_fhlen > NFS4_FHSIZE)
1059 goto xdr_error;
1060 READ_BUF(putfh->pf_fhlen);
1061 SAVEMEM(putfh->pf_fhval, putfh->pf_fhlen);
1062
1063 DECODE_TAIL;
1064}
1065
Al Virob37ad282006-10-19 23:28:59 -07001066static __be32
Anna Schumakere1a90eb2013-10-30 10:00:20 -04001067nfsd4_decode_putpubfh(struct nfsd4_compoundargs *argp, void *p)
1068{
1069 if (argp->minorversion == 0)
1070 return nfs_ok;
1071 return nfserr_notsupp;
1072}
1073
1074static __be32
Linus Torvalds1da177e2005-04-16 15:20:36 -07001075nfsd4_decode_read(struct nfsd4_compoundargs *argp, struct nfsd4_read *read)
1076{
1077 DECODE_HEAD;
1078
Benny Halevye31a1b62008-08-12 20:46:18 +03001079 status = nfsd4_decode_stateid(argp, &read->rd_stateid);
1080 if (status)
1081 return status;
1082 READ_BUF(12);
J. Bruce Fields542d1ab2014-06-02 12:45:31 -04001083 p = xdr_decode_hyper(p, &read->rd_offset);
J. Bruce Fields06553992014-06-02 12:32:51 -04001084 read->rd_length = be32_to_cpup(p++);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001085
1086 DECODE_TAIL;
1087}
1088
Al Virob37ad282006-10-19 23:28:59 -07001089static __be32
Linus Torvalds1da177e2005-04-16 15:20:36 -07001090nfsd4_decode_readdir(struct nfsd4_compoundargs *argp, struct nfsd4_readdir *readdir)
1091{
1092 DECODE_HEAD;
1093
1094 READ_BUF(24);
J. Bruce Fields542d1ab2014-06-02 12:45:31 -04001095 p = xdr_decode_hyper(p, &readdir->rd_cookie);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001096 COPYMEM(readdir->rd_verf.data, sizeof(readdir->rd_verf.data));
J. Bruce Fields06553992014-06-02 12:32:51 -04001097 readdir->rd_dircount = be32_to_cpup(p++);
1098 readdir->rd_maxcount = be32_to_cpup(p++);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001099 if ((status = nfsd4_decode_bitmap(argp, readdir->rd_bmval)))
1100 goto out;
1101
1102 DECODE_TAIL;
1103}
1104
Al Virob37ad282006-10-19 23:28:59 -07001105static __be32
Linus Torvalds1da177e2005-04-16 15:20:36 -07001106nfsd4_decode_remove(struct nfsd4_compoundargs *argp, struct nfsd4_remove *remove)
1107{
1108 DECODE_HEAD;
1109
1110 READ_BUF(4);
J. Bruce Fields06553992014-06-02 12:32:51 -04001111 remove->rm_namelen = be32_to_cpup(p++);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001112 READ_BUF(remove->rm_namelen);
1113 SAVEMEM(remove->rm_name, remove->rm_namelen);
J. Bruce Fieldsa36b1722012-11-25 16:31:00 -05001114 if ((status = check_filename(remove->rm_name, remove->rm_namelen)))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001115 return status;
1116
1117 DECODE_TAIL;
1118}
1119
Al Virob37ad282006-10-19 23:28:59 -07001120static __be32
Linus Torvalds1da177e2005-04-16 15:20:36 -07001121nfsd4_decode_rename(struct nfsd4_compoundargs *argp, struct nfsd4_rename *rename)
1122{
1123 DECODE_HEAD;
1124
1125 READ_BUF(4);
J. Bruce Fields06553992014-06-02 12:32:51 -04001126 rename->rn_snamelen = be32_to_cpup(p++);
J. Bruce Fields4aed9c42016-02-29 20:21:21 -05001127 READ_BUF(rename->rn_snamelen);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001128 SAVEMEM(rename->rn_sname, rename->rn_snamelen);
J. Bruce Fields4aed9c42016-02-29 20:21:21 -05001129 READ_BUF(4);
J. Bruce Fields06553992014-06-02 12:32:51 -04001130 rename->rn_tnamelen = be32_to_cpup(p++);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001131 READ_BUF(rename->rn_tnamelen);
1132 SAVEMEM(rename->rn_tname, rename->rn_tnamelen);
J. Bruce Fieldsa36b1722012-11-25 16:31:00 -05001133 if ((status = check_filename(rename->rn_sname, rename->rn_snamelen)))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001134 return status;
J. Bruce Fieldsa36b1722012-11-25 16:31:00 -05001135 if ((status = check_filename(rename->rn_tname, rename->rn_tnamelen)))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001136 return status;
1137
1138 DECODE_TAIL;
1139}
1140
Al Virob37ad282006-10-19 23:28:59 -07001141static __be32
Linus Torvalds1da177e2005-04-16 15:20:36 -07001142nfsd4_decode_renew(struct nfsd4_compoundargs *argp, clientid_t *clientid)
1143{
1144 DECODE_HEAD;
1145
Anna Schumakere1a90eb2013-10-30 10:00:20 -04001146 if (argp->minorversion >= 1)
1147 return nfserr_notsupp;
1148
Linus Torvalds1da177e2005-04-16 15:20:36 -07001149 READ_BUF(sizeof(clientid_t));
1150 COPYMEM(clientid, sizeof(clientid_t));
1151
1152 DECODE_TAIL;
1153}
1154
Al Virob37ad282006-10-19 23:28:59 -07001155static __be32
Andy Adamsondcb488a32007-07-17 04:04:51 -07001156nfsd4_decode_secinfo(struct nfsd4_compoundargs *argp,
1157 struct nfsd4_secinfo *secinfo)
1158{
1159 DECODE_HEAD;
1160
1161 READ_BUF(4);
J. Bruce Fields06553992014-06-02 12:32:51 -04001162 secinfo->si_namelen = be32_to_cpup(p++);
Andy Adamsondcb488a32007-07-17 04:04:51 -07001163 READ_BUF(secinfo->si_namelen);
1164 SAVEMEM(secinfo->si_name, secinfo->si_namelen);
J. Bruce Fieldsa36b1722012-11-25 16:31:00 -05001165 status = check_filename(secinfo->si_name, secinfo->si_namelen);
Andy Adamsondcb488a32007-07-17 04:04:51 -07001166 if (status)
1167 return status;
1168 DECODE_TAIL;
1169}
1170
1171static __be32
J. Bruce Fields04f4ad12010-12-16 09:51:13 -05001172nfsd4_decode_secinfo_no_name(struct nfsd4_compoundargs *argp,
1173 struct nfsd4_secinfo_no_name *sin)
1174{
1175 DECODE_HEAD;
1176
1177 READ_BUF(4);
J. Bruce Fields06553992014-06-02 12:32:51 -04001178 sin->sin_style = be32_to_cpup(p++);
J. Bruce Fields04f4ad12010-12-16 09:51:13 -05001179 DECODE_TAIL;
1180}
1181
1182static __be32
Linus Torvalds1da177e2005-04-16 15:20:36 -07001183nfsd4_decode_setattr(struct nfsd4_compoundargs *argp, struct nfsd4_setattr *setattr)
1184{
Benny Halevye31a1b62008-08-12 20:46:18 +03001185 __be32 status;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001186
Benny Halevye31a1b62008-08-12 20:46:18 +03001187 status = nfsd4_decode_stateid(argp, &setattr->sa_stateid);
1188 if (status)
1189 return status;
Yu Zhiguo3c8e0312009-05-16 16:22:31 +08001190 return nfsd4_decode_fattr(argp, setattr->sa_bmval, &setattr->sa_iattr,
Andreas Gruenbacher47057ab2016-01-12 20:24:14 +01001191 &setattr->sa_acl, &setattr->sa_label, NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001192}
1193
Al Virob37ad282006-10-19 23:28:59 -07001194static __be32
Linus Torvalds1da177e2005-04-16 15:20:36 -07001195nfsd4_decode_setclientid(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid *setclientid)
1196{
1197 DECODE_HEAD;
1198
Anna Schumakere1a90eb2013-10-30 10:00:20 -04001199 if (argp->minorversion >= 1)
1200 return nfserr_notsupp;
1201
Chuck Leverab4684d2012-03-02 17:13:50 -05001202 READ_BUF(NFS4_VERIFIER_SIZE);
1203 COPYMEM(setclientid->se_verf.data, NFS4_VERIFIER_SIZE);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001204
J. Bruce Fieldsa084daf2011-10-10 15:07:40 -04001205 status = nfsd4_decode_opaque(argp, &setclientid->se_name);
1206 if (status)
1207 return nfserr_bad_xdr;
1208 READ_BUF(8);
J. Bruce Fields06553992014-06-02 12:32:51 -04001209 setclientid->se_callback_prog = be32_to_cpup(p++);
1210 setclientid->se_callback_netid_len = be32_to_cpup(p++);
J. Bruce Fields4aed9c42016-02-29 20:21:21 -05001211 READ_BUF(setclientid->se_callback_netid_len);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001212 SAVEMEM(setclientid->se_callback_netid_val, setclientid->se_callback_netid_len);
J. Bruce Fields4aed9c42016-02-29 20:21:21 -05001213 READ_BUF(4);
J. Bruce Fields06553992014-06-02 12:32:51 -04001214 setclientid->se_callback_addr_len = be32_to_cpup(p++);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001215
J. Bruce Fields4aed9c42016-02-29 20:21:21 -05001216 READ_BUF(setclientid->se_callback_addr_len);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001217 SAVEMEM(setclientid->se_callback_addr_val, setclientid->se_callback_addr_len);
J. Bruce Fields4aed9c42016-02-29 20:21:21 -05001218 READ_BUF(4);
J. Bruce Fields06553992014-06-02 12:32:51 -04001219 setclientid->se_callback_ident = be32_to_cpup(p++);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001220
1221 DECODE_TAIL;
1222}
1223
Al Virob37ad282006-10-19 23:28:59 -07001224static __be32
Linus Torvalds1da177e2005-04-16 15:20:36 -07001225nfsd4_decode_setclientid_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid_confirm *scd_c)
1226{
1227 DECODE_HEAD;
1228
Anna Schumakere1a90eb2013-10-30 10:00:20 -04001229 if (argp->minorversion >= 1)
1230 return nfserr_notsupp;
1231
Chuck Leverab4684d2012-03-02 17:13:50 -05001232 READ_BUF(8 + NFS4_VERIFIER_SIZE);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001233 COPYMEM(&scd_c->sc_clientid, 8);
Chuck Leverab4684d2012-03-02 17:13:50 -05001234 COPYMEM(&scd_c->sc_confirm, NFS4_VERIFIER_SIZE);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001235
1236 DECODE_TAIL;
1237}
1238
1239/* Also used for NVERIFY */
Al Virob37ad282006-10-19 23:28:59 -07001240static __be32
Linus Torvalds1da177e2005-04-16 15:20:36 -07001241nfsd4_decode_verify(struct nfsd4_compoundargs *argp, struct nfsd4_verify *verify)
1242{
Linus Torvalds1da177e2005-04-16 15:20:36 -07001243 DECODE_HEAD;
1244
1245 if ((status = nfsd4_decode_bitmap(argp, verify->ve_bmval)))
1246 goto out;
1247
1248 /* For convenience's sake, we compare raw xdr'd attributes in
J. Bruce Fieldse5f95702012-11-30 17:24:18 -05001249 * nfsd4_proc_verify */
1250
Linus Torvalds1da177e2005-04-16 15:20:36 -07001251 READ_BUF(4);
J. Bruce Fields06553992014-06-02 12:32:51 -04001252 verify->ve_attrlen = be32_to_cpup(p++);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001253 READ_BUF(verify->ve_attrlen);
1254 SAVEMEM(verify->ve_attrval, verify->ve_attrlen);
1255
1256 DECODE_TAIL;
1257}
1258
Al Virob37ad282006-10-19 23:28:59 -07001259static __be32
Linus Torvalds1da177e2005-04-16 15:20:36 -07001260nfsd4_decode_write(struct nfsd4_compoundargs *argp, struct nfsd4_write *write)
1261{
1262 int avail;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001263 int len;
1264 DECODE_HEAD;
1265
Benny Halevye31a1b62008-08-12 20:46:18 +03001266 status = nfsd4_decode_stateid(argp, &write->wr_stateid);
1267 if (status)
1268 return status;
1269 READ_BUF(16);
J. Bruce Fields542d1ab2014-06-02 12:45:31 -04001270 p = xdr_decode_hyper(p, &write->wr_offset);
J. Bruce Fields06553992014-06-02 12:32:51 -04001271 write->wr_stable_how = be32_to_cpup(p++);
Kinglong Mee54bbb7d2016-12-31 20:59:53 +08001272 if (write->wr_stable_how > NFS_FILE_SYNC)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001273 goto xdr_error;
J. Bruce Fields06553992014-06-02 12:32:51 -04001274 write->wr_buflen = be32_to_cpup(p++);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001275
1276 /* Sorry .. no magic macros for this.. *
1277 * READ_BUF(write->wr_buflen);
1278 * SAVEMEM(write->wr_buf, write->wr_buflen);
1279 */
1280 avail = (char*)argp->end - (char*)argp->p;
1281 if (avail + argp->pagelen < write->wr_buflen) {
Chuck Lever817cb9d2007-09-11 18:01:20 -04001282 dprintk("NFSD: xdr error (%s:%d)\n",
1283 __FILE__, __LINE__);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001284 goto xdr_error;
1285 }
J. Bruce Fields70cc7f72012-11-16 14:16:46 -05001286 write->wr_head.iov_base = p;
1287 write->wr_head.iov_len = avail;
J. Bruce Fields70cc7f72012-11-16 14:16:46 -05001288 write->wr_pagelist = argp->pagelist;
J. Bruce Fields5a80a542012-11-16 10:01:30 -05001289
1290 len = XDR_QUADLEN(write->wr_buflen) << 2;
1291 if (len >= avail) {
1292 int pages;
1293
1294 len -= avail;
1295
1296 pages = len >> PAGE_SHIFT;
1297 argp->pagelist += pages;
1298 argp->pagelen -= pages * PAGE_SIZE;
1299 len -= pages * PAGE_SIZE;
1300
Chuck Leverfc788f62017-08-18 11:12:19 -04001301 next_decode_page(argp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001302 }
J. Bruce Fields5a80a542012-11-16 10:01:30 -05001303 argp->p += XDR_QUADLEN(len);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001304
1305 DECODE_TAIL;
1306}
1307
Al Virob37ad282006-10-19 23:28:59 -07001308static __be32
Linus Torvalds1da177e2005-04-16 15:20:36 -07001309nfsd4_decode_release_lockowner(struct nfsd4_compoundargs *argp, struct nfsd4_release_lockowner *rlockowner)
1310{
1311 DECODE_HEAD;
1312
Anna Schumakere1a90eb2013-10-30 10:00:20 -04001313 if (argp->minorversion >= 1)
1314 return nfserr_notsupp;
1315
Linus Torvalds1da177e2005-04-16 15:20:36 -07001316 READ_BUF(12);
1317 COPYMEM(&rlockowner->rl_clientid, sizeof(clientid_t));
J. Bruce Fields06553992014-06-02 12:32:51 -04001318 rlockowner->rl_owner.len = be32_to_cpup(p++);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001319 READ_BUF(rlockowner->rl_owner.len);
1320 READMEM(rlockowner->rl_owner.data, rlockowner->rl_owner.len);
1321
Andy Adamson60adfc52009-04-03 08:28:50 +03001322 if (argp->minorversion && !zero_clientid(&rlockowner->rl_clientid))
1323 return nfserr_inval;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001324 DECODE_TAIL;
1325}
1326
Al Virob37ad282006-10-19 23:28:59 -07001327static __be32
Andy Adamson2db134e2009-04-03 08:27:55 +03001328nfsd4_decode_exchange_id(struct nfsd4_compoundargs *argp,
Andy Adamson0733d212009-04-03 08:28:01 +03001329 struct nfsd4_exchange_id *exid)
Andy Adamson2db134e2009-04-03 08:27:55 +03001330{
Mi Jinlong5afa0402010-11-09 09:39:23 +08001331 int dummy, tmp;
Andy Adamson0733d212009-04-03 08:28:01 +03001332 DECODE_HEAD;
1333
1334 READ_BUF(NFS4_VERIFIER_SIZE);
1335 COPYMEM(exid->verifier.data, NFS4_VERIFIER_SIZE);
1336
J. Bruce Fieldsa084daf2011-10-10 15:07:40 -04001337 status = nfsd4_decode_opaque(argp, &exid->clname);
1338 if (status)
1339 return nfserr_bad_xdr;
Andy Adamson0733d212009-04-03 08:28:01 +03001340
1341 READ_BUF(4);
J. Bruce Fields06553992014-06-02 12:32:51 -04001342 exid->flags = be32_to_cpup(p++);
Andy Adamson0733d212009-04-03 08:28:01 +03001343
1344 /* Ignore state_protect4_a */
1345 READ_BUF(4);
J. Bruce Fields06553992014-06-02 12:32:51 -04001346 exid->spa_how = be32_to_cpup(p++);
Andy Adamson0733d212009-04-03 08:28:01 +03001347 switch (exid->spa_how) {
1348 case SP4_NONE:
1349 break;
1350 case SP4_MACH_CRED:
1351 /* spo_must_enforce */
Andrew Elbleed941642016-06-15 12:52:09 -04001352 status = nfsd4_decode_bitmap(argp,
1353 exid->spo_must_enforce);
1354 if (status)
1355 goto out;
Andy Adamson0733d212009-04-03 08:28:01 +03001356 /* spo_must_allow */
Andrew Elbleed941642016-06-15 12:52:09 -04001357 status = nfsd4_decode_bitmap(argp, exid->spo_must_allow);
1358 if (status)
1359 goto out;
Andy Adamson0733d212009-04-03 08:28:01 +03001360 break;
1361 case SP4_SSV:
1362 /* ssp_ops */
1363 READ_BUF(4);
J. Bruce Fields06553992014-06-02 12:32:51 -04001364 dummy = be32_to_cpup(p++);
Andy Adamson0733d212009-04-03 08:28:01 +03001365 READ_BUF(dummy * 4);
1366 p += dummy;
1367
1368 READ_BUF(4);
J. Bruce Fields06553992014-06-02 12:32:51 -04001369 dummy = be32_to_cpup(p++);
Andy Adamson0733d212009-04-03 08:28:01 +03001370 READ_BUF(dummy * 4);
1371 p += dummy;
1372
1373 /* ssp_hash_algs<> */
1374 READ_BUF(4);
J. Bruce Fields06553992014-06-02 12:32:51 -04001375 tmp = be32_to_cpup(p++);
Mi Jinlong5afa0402010-11-09 09:39:23 +08001376 while (tmp--) {
1377 READ_BUF(4);
J. Bruce Fields06553992014-06-02 12:32:51 -04001378 dummy = be32_to_cpup(p++);
Mi Jinlong5afa0402010-11-09 09:39:23 +08001379 READ_BUF(dummy);
1380 p += XDR_QUADLEN(dummy);
1381 }
Andy Adamson0733d212009-04-03 08:28:01 +03001382
1383 /* ssp_encr_algs<> */
1384 READ_BUF(4);
J. Bruce Fields06553992014-06-02 12:32:51 -04001385 tmp = be32_to_cpup(p++);
Mi Jinlong5afa0402010-11-09 09:39:23 +08001386 while (tmp--) {
1387 READ_BUF(4);
J. Bruce Fields06553992014-06-02 12:32:51 -04001388 dummy = be32_to_cpup(p++);
Mi Jinlong5afa0402010-11-09 09:39:23 +08001389 READ_BUF(dummy);
1390 p += XDR_QUADLEN(dummy);
1391 }
Andy Adamson0733d212009-04-03 08:28:01 +03001392
nixiaoming5ed96bc2018-07-23 09:57:11 +08001393 /* ignore ssp_window and ssp_num_gss_handles: */
Andy Adamson0733d212009-04-03 08:28:01 +03001394 READ_BUF(8);
Andy Adamson0733d212009-04-03 08:28:01 +03001395 break;
1396 default:
1397 goto xdr_error;
1398 }
1399
1400 /* Ignore Implementation ID */
1401 READ_BUF(4); /* nfs_impl_id4 array length */
J. Bruce Fields06553992014-06-02 12:32:51 -04001402 dummy = be32_to_cpup(p++);
Andy Adamson0733d212009-04-03 08:28:01 +03001403
1404 if (dummy > 1)
1405 goto xdr_error;
1406
1407 if (dummy == 1) {
1408 /* nii_domain */
1409 READ_BUF(4);
J. Bruce Fields06553992014-06-02 12:32:51 -04001410 dummy = be32_to_cpup(p++);
Andy Adamson0733d212009-04-03 08:28:01 +03001411 READ_BUF(dummy);
1412 p += XDR_QUADLEN(dummy);
1413
1414 /* nii_name */
1415 READ_BUF(4);
J. Bruce Fields06553992014-06-02 12:32:51 -04001416 dummy = be32_to_cpup(p++);
Andy Adamson0733d212009-04-03 08:28:01 +03001417 READ_BUF(dummy);
1418 p += XDR_QUADLEN(dummy);
1419
1420 /* nii_date */
1421 READ_BUF(12);
1422 p += 3;
1423 }
1424 DECODE_TAIL;
Andy Adamson2db134e2009-04-03 08:27:55 +03001425}
1426
1427static __be32
1428nfsd4_decode_create_session(struct nfsd4_compoundargs *argp,
1429 struct nfsd4_create_session *sess)
1430{
Andy Adamsonec6b5d72009-04-03 08:28:28 +03001431 DECODE_HEAD;
Andy Adamsonec6b5d72009-04-03 08:28:28 +03001432 u32 dummy;
Andy Adamsonec6b5d72009-04-03 08:28:28 +03001433
1434 READ_BUF(16);
1435 COPYMEM(&sess->clientid, 8);
J. Bruce Fields06553992014-06-02 12:32:51 -04001436 sess->seqid = be32_to_cpup(p++);
1437 sess->flags = be32_to_cpup(p++);
Andy Adamsonec6b5d72009-04-03 08:28:28 +03001438
1439 /* Fore channel attrs */
1440 READ_BUF(28);
J. Bruce Fields06553992014-06-02 12:32:51 -04001441 dummy = be32_to_cpup(p++); /* headerpadsz is always 0 */
1442 sess->fore_channel.maxreq_sz = be32_to_cpup(p++);
1443 sess->fore_channel.maxresp_sz = be32_to_cpup(p++);
1444 sess->fore_channel.maxresp_cached = be32_to_cpup(p++);
1445 sess->fore_channel.maxops = be32_to_cpup(p++);
1446 sess->fore_channel.maxreqs = be32_to_cpup(p++);
1447 sess->fore_channel.nr_rdma_attrs = be32_to_cpup(p++);
Andy Adamsonec6b5d72009-04-03 08:28:28 +03001448 if (sess->fore_channel.nr_rdma_attrs == 1) {
1449 READ_BUF(4);
J. Bruce Fields06553992014-06-02 12:32:51 -04001450 sess->fore_channel.rdma_attrs = be32_to_cpup(p++);
Andy Adamsonec6b5d72009-04-03 08:28:28 +03001451 } else if (sess->fore_channel.nr_rdma_attrs > 1) {
1452 dprintk("Too many fore channel attr bitmaps!\n");
1453 goto xdr_error;
1454 }
1455
1456 /* Back channel attrs */
1457 READ_BUF(28);
J. Bruce Fields06553992014-06-02 12:32:51 -04001458 dummy = be32_to_cpup(p++); /* headerpadsz is always 0 */
1459 sess->back_channel.maxreq_sz = be32_to_cpup(p++);
1460 sess->back_channel.maxresp_sz = be32_to_cpup(p++);
1461 sess->back_channel.maxresp_cached = be32_to_cpup(p++);
1462 sess->back_channel.maxops = be32_to_cpup(p++);
1463 sess->back_channel.maxreqs = be32_to_cpup(p++);
1464 sess->back_channel.nr_rdma_attrs = be32_to_cpup(p++);
Andy Adamsonec6b5d72009-04-03 08:28:28 +03001465 if (sess->back_channel.nr_rdma_attrs == 1) {
1466 READ_BUF(4);
J. Bruce Fields06553992014-06-02 12:32:51 -04001467 sess->back_channel.rdma_attrs = be32_to_cpup(p++);
Andy Adamsonec6b5d72009-04-03 08:28:28 +03001468 } else if (sess->back_channel.nr_rdma_attrs > 1) {
1469 dprintk("Too many back channel attr bitmaps!\n");
1470 goto xdr_error;
1471 }
1472
J. Bruce Fieldsacb28872012-03-27 14:50:26 -04001473 READ_BUF(4);
J. Bruce Fields06553992014-06-02 12:32:51 -04001474 sess->callback_prog = be32_to_cpup(p++);
J. Bruce Fieldsacb28872012-03-27 14:50:26 -04001475 nfsd4_decode_cb_sec(argp, &sess->cb_sec);
Andy Adamsonec6b5d72009-04-03 08:28:28 +03001476 DECODE_TAIL;
Andy Adamson2db134e2009-04-03 08:27:55 +03001477}
1478
1479static __be32
1480nfsd4_decode_destroy_session(struct nfsd4_compoundargs *argp,
1481 struct nfsd4_destroy_session *destroy_session)
1482{
Benny Halevye10e0cf2009-04-03 08:28:38 +03001483 DECODE_HEAD;
1484 READ_BUF(NFS4_MAX_SESSIONID_LEN);
1485 COPYMEM(destroy_session->sessionid.data, NFS4_MAX_SESSIONID_LEN);
1486
1487 DECODE_TAIL;
Andy Adamson2db134e2009-04-03 08:27:55 +03001488}
1489
1490static __be32
Bryan Schumakere1ca12d2011-07-13 11:04:21 -04001491nfsd4_decode_free_stateid(struct nfsd4_compoundargs *argp,
1492 struct nfsd4_free_stateid *free_stateid)
1493{
1494 DECODE_HEAD;
1495
1496 READ_BUF(sizeof(stateid_t));
J. Bruce Fields06553992014-06-02 12:32:51 -04001497 free_stateid->fr_stateid.si_generation = be32_to_cpup(p++);
Bryan Schumakere1ca12d2011-07-13 11:04:21 -04001498 COPYMEM(&free_stateid->fr_stateid.si_opaque, sizeof(stateid_opaque_t));
1499
1500 DECODE_TAIL;
1501}
1502
1503static __be32
Andy Adamson2db134e2009-04-03 08:27:55 +03001504nfsd4_decode_sequence(struct nfsd4_compoundargs *argp,
1505 struct nfsd4_sequence *seq)
1506{
Benny Halevyb85d4c02009-04-03 08:28:08 +03001507 DECODE_HEAD;
1508
1509 READ_BUF(NFS4_MAX_SESSIONID_LEN + 16);
1510 COPYMEM(seq->sessionid.data, NFS4_MAX_SESSIONID_LEN);
J. Bruce Fields06553992014-06-02 12:32:51 -04001511 seq->seqid = be32_to_cpup(p++);
1512 seq->slotid = be32_to_cpup(p++);
1513 seq->maxslots = be32_to_cpup(p++);
1514 seq->cachethis = be32_to_cpup(p++);
Benny Halevyb85d4c02009-04-03 08:28:08 +03001515
1516 DECODE_TAIL;
Andy Adamson2db134e2009-04-03 08:27:55 +03001517}
1518
Bryan Schumaker17456802011-07-13 10:50:48 -04001519static __be32
1520nfsd4_decode_test_stateid(struct nfsd4_compoundargs *argp, struct nfsd4_test_stateid *test_stateid)
1521{
Bryan Schumaker17456802011-07-13 10:50:48 -04001522 int i;
Bryan Schumaker03cfb4202012-01-27 10:22:49 -05001523 __be32 *p, status;
1524 struct nfsd4_test_stateid_id *stateid;
Bryan Schumaker17456802011-07-13 10:50:48 -04001525
1526 READ_BUF(4);
1527 test_stateid->ts_num_ids = ntohl(*p++);
1528
Bryan Schumaker03cfb4202012-01-27 10:22:49 -05001529 INIT_LIST_HEAD(&test_stateid->ts_stateid_list);
Bryan Schumaker17456802011-07-13 10:50:48 -04001530
1531 for (i = 0; i < test_stateid->ts_num_ids; i++) {
J. Bruce Fieldsd5e23382014-06-24 17:43:45 -04001532 stateid = svcxdr_tmpalloc(argp, sizeof(*stateid));
Bryan Schumaker03cfb4202012-01-27 10:22:49 -05001533 if (!stateid) {
Al Viroafcf6792012-04-13 00:15:37 -04001534 status = nfserrno(-ENOMEM);
Bryan Schumaker03cfb4202012-01-27 10:22:49 -05001535 goto out;
1536 }
1537
Bryan Schumaker03cfb4202012-01-27 10:22:49 -05001538 INIT_LIST_HEAD(&stateid->ts_id_list);
1539 list_add_tail(&stateid->ts_id_list, &test_stateid->ts_stateid_list);
1540
1541 status = nfsd4_decode_stateid(argp, &stateid->ts_id_stateid);
Bryan Schumaker17456802011-07-13 10:50:48 -04001542 if (status)
Bryan Schumaker03cfb4202012-01-27 10:22:49 -05001543 goto out;
Bryan Schumaker17456802011-07-13 10:50:48 -04001544 }
1545
1546 status = 0;
1547out:
1548 return status;
1549xdr_error:
1550 dprintk("NFSD: xdr error (%s:%d)\n", __FILE__, __LINE__);
1551 status = nfserr_bad_xdr;
1552 goto out;
1553}
1554
Mi Jinlong345c2842011-10-20 17:51:39 +08001555static __be32 nfsd4_decode_destroy_clientid(struct nfsd4_compoundargs *argp, struct nfsd4_destroy_clientid *dc)
1556{
1557 DECODE_HEAD;
1558
1559 READ_BUF(8);
1560 COPYMEM(&dc->clientid, 8);
1561
1562 DECODE_TAIL;
1563}
1564
J. Bruce Fields4dc6ec02010-04-19 15:11:28 -04001565static __be32 nfsd4_decode_reclaim_complete(struct nfsd4_compoundargs *argp, struct nfsd4_reclaim_complete *rc)
1566{
1567 DECODE_HEAD;
1568
1569 READ_BUF(4);
J. Bruce Fields06553992014-06-02 12:32:51 -04001570 rc->rca_one_fs = be32_to_cpup(p++);
J. Bruce Fields4dc6ec02010-04-19 15:11:28 -04001571
1572 DECODE_TAIL;
1573}
1574
Christoph Hellwig9cf514c2014-05-05 13:11:59 +02001575#ifdef CONFIG_NFSD_PNFS
1576static __be32
1577nfsd4_decode_getdeviceinfo(struct nfsd4_compoundargs *argp,
1578 struct nfsd4_getdeviceinfo *gdev)
1579{
1580 DECODE_HEAD;
1581 u32 num, i;
1582
1583 READ_BUF(sizeof(struct nfsd4_deviceid) + 3 * 4);
1584 COPYMEM(&gdev->gd_devid, sizeof(struct nfsd4_deviceid));
1585 gdev->gd_layout_type = be32_to_cpup(p++);
1586 gdev->gd_maxcount = be32_to_cpup(p++);
1587 num = be32_to_cpup(p++);
1588 if (num) {
Scott Mayhew3171822f2018-06-08 16:31:46 -04001589 if (num > 1000)
1590 goto xdr_error;
Christoph Hellwig9cf514c2014-05-05 13:11:59 +02001591 READ_BUF(4 * num);
1592 gdev->gd_notify_types = be32_to_cpup(p++);
1593 for (i = 1; i < num; i++) {
1594 if (be32_to_cpup(p++)) {
1595 status = nfserr_inval;
1596 goto out;
1597 }
1598 }
1599 }
1600 DECODE_TAIL;
1601}
1602
1603static __be32
1604nfsd4_decode_layoutget(struct nfsd4_compoundargs *argp,
1605 struct nfsd4_layoutget *lgp)
1606{
1607 DECODE_HEAD;
1608
1609 READ_BUF(36);
1610 lgp->lg_signal = be32_to_cpup(p++);
1611 lgp->lg_layout_type = be32_to_cpup(p++);
1612 lgp->lg_seg.iomode = be32_to_cpup(p++);
1613 p = xdr_decode_hyper(p, &lgp->lg_seg.offset);
1614 p = xdr_decode_hyper(p, &lgp->lg_seg.length);
1615 p = xdr_decode_hyper(p, &lgp->lg_minlength);
Kinglong Meedb59c0e2015-03-19 19:04:41 +08001616
1617 status = nfsd4_decode_stateid(argp, &lgp->lg_sid);
1618 if (status)
1619 return status;
1620
Christoph Hellwig9cf514c2014-05-05 13:11:59 +02001621 READ_BUF(4);
1622 lgp->lg_maxcount = be32_to_cpup(p++);
1623
1624 DECODE_TAIL;
1625}
1626
1627static __be32
1628nfsd4_decode_layoutcommit(struct nfsd4_compoundargs *argp,
1629 struct nfsd4_layoutcommit *lcp)
1630{
1631 DECODE_HEAD;
1632 u32 timechange;
1633
1634 READ_BUF(20);
1635 p = xdr_decode_hyper(p, &lcp->lc_seg.offset);
1636 p = xdr_decode_hyper(p, &lcp->lc_seg.length);
1637 lcp->lc_reclaim = be32_to_cpup(p++);
Kinglong Meedb59c0e2015-03-19 19:04:41 +08001638
1639 status = nfsd4_decode_stateid(argp, &lcp->lc_sid);
1640 if (status)
1641 return status;
1642
Christoph Hellwig9cf514c2014-05-05 13:11:59 +02001643 READ_BUF(4);
1644 lcp->lc_newoffset = be32_to_cpup(p++);
1645 if (lcp->lc_newoffset) {
1646 READ_BUF(8);
1647 p = xdr_decode_hyper(p, &lcp->lc_last_wr);
1648 } else
1649 lcp->lc_last_wr = 0;
1650 READ_BUF(4);
1651 timechange = be32_to_cpup(p++);
1652 if (timechange) {
1653 status = nfsd4_decode_time(argp, &lcp->lc_mtime);
1654 if (status)
1655 return status;
1656 } else {
1657 lcp->lc_mtime.tv_nsec = UTIME_NOW;
1658 }
1659 READ_BUF(8);
1660 lcp->lc_layout_type = be32_to_cpup(p++);
1661
1662 /*
1663 * Save the layout update in XDR format and let the layout driver deal
1664 * with it later.
1665 */
1666 lcp->lc_up_len = be32_to_cpup(p++);
1667 if (lcp->lc_up_len > 0) {
1668 READ_BUF(lcp->lc_up_len);
1669 READMEM(lcp->lc_up_layout, lcp->lc_up_len);
1670 }
1671
1672 DECODE_TAIL;
1673}
1674
1675static __be32
1676nfsd4_decode_layoutreturn(struct nfsd4_compoundargs *argp,
1677 struct nfsd4_layoutreturn *lrp)
1678{
1679 DECODE_HEAD;
1680
1681 READ_BUF(16);
1682 lrp->lr_reclaim = be32_to_cpup(p++);
1683 lrp->lr_layout_type = be32_to_cpup(p++);
1684 lrp->lr_seg.iomode = be32_to_cpup(p++);
1685 lrp->lr_return_type = be32_to_cpup(p++);
1686 if (lrp->lr_return_type == RETURN_FILE) {
1687 READ_BUF(16);
1688 p = xdr_decode_hyper(p, &lrp->lr_seg.offset);
1689 p = xdr_decode_hyper(p, &lrp->lr_seg.length);
Kinglong Meedb59c0e2015-03-19 19:04:41 +08001690
1691 status = nfsd4_decode_stateid(argp, &lrp->lr_sid);
1692 if (status)
1693 return status;
1694
Christoph Hellwig9cf514c2014-05-05 13:11:59 +02001695 READ_BUF(4);
1696 lrp->lrf_body_len = be32_to_cpup(p++);
1697 if (lrp->lrf_body_len > 0) {
1698 READ_BUF(lrp->lrf_body_len);
1699 READMEM(lrp->lrf_body, lrp->lrf_body_len);
1700 }
1701 } else {
1702 lrp->lr_seg.offset = 0;
1703 lrp->lr_seg.length = NFS4_MAX_UINT64;
1704 }
1705
1706 DECODE_TAIL;
1707}
1708#endif /* CONFIG_NFSD_PNFS */
1709
Andy Adamson2db134e2009-04-03 08:27:55 +03001710static __be32
Anna Schumaker95d871f2014-11-07 14:44:26 -05001711nfsd4_decode_fallocate(struct nfsd4_compoundargs *argp,
1712 struct nfsd4_fallocate *fallocate)
1713{
1714 DECODE_HEAD;
1715
1716 status = nfsd4_decode_stateid(argp, &fallocate->falloc_stateid);
1717 if (status)
1718 return status;
1719
1720 READ_BUF(16);
1721 p = xdr_decode_hyper(p, &fallocate->falloc_offset);
1722 xdr_decode_hyper(p, &fallocate->falloc_length);
1723
1724 DECODE_TAIL;
1725}
1726
1727static __be32
Christoph Hellwigffa01602015-12-03 12:59:52 +01001728nfsd4_decode_clone(struct nfsd4_compoundargs *argp, struct nfsd4_clone *clone)
1729{
1730 DECODE_HEAD;
1731
1732 status = nfsd4_decode_stateid(argp, &clone->cl_src_stateid);
1733 if (status)
1734 return status;
1735 status = nfsd4_decode_stateid(argp, &clone->cl_dst_stateid);
1736 if (status)
1737 return status;
1738
1739 READ_BUF(8 + 8 + 8);
1740 p = xdr_decode_hyper(p, &clone->cl_src_pos);
1741 p = xdr_decode_hyper(p, &clone->cl_dst_pos);
1742 p = xdr_decode_hyper(p, &clone->cl_count);
1743 DECODE_TAIL;
1744}
1745
1746static __be32
Anna Schumaker29ae7f92016-09-07 15:57:30 -04001747nfsd4_decode_copy(struct nfsd4_compoundargs *argp, struct nfsd4_copy *copy)
1748{
1749 DECODE_HEAD;
1750 unsigned int tmp;
1751
1752 status = nfsd4_decode_stateid(argp, &copy->cp_src_stateid);
1753 if (status)
1754 return status;
1755 status = nfsd4_decode_stateid(argp, &copy->cp_dst_stateid);
1756 if (status)
1757 return status;
1758
1759 READ_BUF(8 + 8 + 8 + 4 + 4 + 4);
1760 p = xdr_decode_hyper(p, &copy->cp_src_pos);
1761 p = xdr_decode_hyper(p, &copy->cp_dst_pos);
1762 p = xdr_decode_hyper(p, &copy->cp_count);
J. Bruce Fieldsedcc8452018-03-07 15:37:35 -05001763 p++; /* ca_consecutive: we always do consecutive copies */
Anna Schumaker29ae7f92016-09-07 15:57:30 -04001764 copy->cp_synchronous = be32_to_cpup(p++);
1765 tmp = be32_to_cpup(p); /* Source server list not supported */
1766
1767 DECODE_TAIL;
1768}
1769
1770static __be32
Anna Schumaker24bab492014-09-26 13:58:27 -04001771nfsd4_decode_seek(struct nfsd4_compoundargs *argp, struct nfsd4_seek *seek)
1772{
1773 DECODE_HEAD;
1774
1775 status = nfsd4_decode_stateid(argp, &seek->seek_stateid);
1776 if (status)
1777 return status;
1778
1779 READ_BUF(8 + 4);
1780 p = xdr_decode_hyper(p, &seek->seek_offset);
1781 seek->seek_whence = be32_to_cpup(p);
1782
1783 DECODE_TAIL;
1784}
1785
1786static __be32
Benny Halevy347e0ad2008-07-02 11:13:41 +03001787nfsd4_decode_noop(struct nfsd4_compoundargs *argp, void *p)
1788{
1789 return nfs_ok;
1790}
1791
Benny Halevy3c375c62008-07-02 11:14:01 +03001792static __be32
1793nfsd4_decode_notsupp(struct nfsd4_compoundargs *argp, void *p)
1794{
Benny Halevy1e685ec2009-03-04 23:06:06 +02001795 return nfserr_notsupp;
Benny Halevy3c375c62008-07-02 11:14:01 +03001796}
1797
Benny Halevy347e0ad2008-07-02 11:13:41 +03001798typedef __be32(*nfsd4_dec)(struct nfsd4_compoundargs *argp, void *);
1799
Chuck Leverc1df6092017-08-01 11:59:58 -04001800static const nfsd4_dec nfsd4_dec_ops[] = {
J. Bruce Fieldsad1060c2008-07-18 15:04:16 -04001801 [OP_ACCESS] = (nfsd4_dec)nfsd4_decode_access,
1802 [OP_CLOSE] = (nfsd4_dec)nfsd4_decode_close,
1803 [OP_COMMIT] = (nfsd4_dec)nfsd4_decode_commit,
1804 [OP_CREATE] = (nfsd4_dec)nfsd4_decode_create,
1805 [OP_DELEGPURGE] = (nfsd4_dec)nfsd4_decode_notsupp,
1806 [OP_DELEGRETURN] = (nfsd4_dec)nfsd4_decode_delegreturn,
1807 [OP_GETATTR] = (nfsd4_dec)nfsd4_decode_getattr,
1808 [OP_GETFH] = (nfsd4_dec)nfsd4_decode_noop,
1809 [OP_LINK] = (nfsd4_dec)nfsd4_decode_link,
1810 [OP_LOCK] = (nfsd4_dec)nfsd4_decode_lock,
1811 [OP_LOCKT] = (nfsd4_dec)nfsd4_decode_lockt,
1812 [OP_LOCKU] = (nfsd4_dec)nfsd4_decode_locku,
1813 [OP_LOOKUP] = (nfsd4_dec)nfsd4_decode_lookup,
1814 [OP_LOOKUPP] = (nfsd4_dec)nfsd4_decode_noop,
1815 [OP_NVERIFY] = (nfsd4_dec)nfsd4_decode_verify,
1816 [OP_OPEN] = (nfsd4_dec)nfsd4_decode_open,
1817 [OP_OPENATTR] = (nfsd4_dec)nfsd4_decode_notsupp,
1818 [OP_OPEN_CONFIRM] = (nfsd4_dec)nfsd4_decode_open_confirm,
1819 [OP_OPEN_DOWNGRADE] = (nfsd4_dec)nfsd4_decode_open_downgrade,
1820 [OP_PUTFH] = (nfsd4_dec)nfsd4_decode_putfh,
Anna Schumakere1a90eb2013-10-30 10:00:20 -04001821 [OP_PUTPUBFH] = (nfsd4_dec)nfsd4_decode_putpubfh,
J. Bruce Fieldsad1060c2008-07-18 15:04:16 -04001822 [OP_PUTROOTFH] = (nfsd4_dec)nfsd4_decode_noop,
1823 [OP_READ] = (nfsd4_dec)nfsd4_decode_read,
1824 [OP_READDIR] = (nfsd4_dec)nfsd4_decode_readdir,
1825 [OP_READLINK] = (nfsd4_dec)nfsd4_decode_noop,
1826 [OP_REMOVE] = (nfsd4_dec)nfsd4_decode_remove,
1827 [OP_RENAME] = (nfsd4_dec)nfsd4_decode_rename,
1828 [OP_RENEW] = (nfsd4_dec)nfsd4_decode_renew,
1829 [OP_RESTOREFH] = (nfsd4_dec)nfsd4_decode_noop,
1830 [OP_SAVEFH] = (nfsd4_dec)nfsd4_decode_noop,
1831 [OP_SECINFO] = (nfsd4_dec)nfsd4_decode_secinfo,
1832 [OP_SETATTR] = (nfsd4_dec)nfsd4_decode_setattr,
1833 [OP_SETCLIENTID] = (nfsd4_dec)nfsd4_decode_setclientid,
1834 [OP_SETCLIENTID_CONFIRM] = (nfsd4_dec)nfsd4_decode_setclientid_confirm,
1835 [OP_VERIFY] = (nfsd4_dec)nfsd4_decode_verify,
1836 [OP_WRITE] = (nfsd4_dec)nfsd4_decode_write,
1837 [OP_RELEASE_LOCKOWNER] = (nfsd4_dec)nfsd4_decode_release_lockowner,
Andy Adamson2db134e2009-04-03 08:27:55 +03001838
1839 /* new operations for NFSv4.1 */
J. Bruce Fieldscb73a9f2012-11-01 18:09:48 -04001840 [OP_BACKCHANNEL_CTL] = (nfsd4_dec)nfsd4_decode_backchannel_ctl,
J. Bruce Fields1d1bc8f2010-10-04 23:12:59 -04001841 [OP_BIND_CONN_TO_SESSION]= (nfsd4_dec)nfsd4_decode_bind_conn_to_session,
Randy Dunlap9064caa2009-04-28 16:48:25 -07001842 [OP_EXCHANGE_ID] = (nfsd4_dec)nfsd4_decode_exchange_id,
1843 [OP_CREATE_SESSION] = (nfsd4_dec)nfsd4_decode_create_session,
1844 [OP_DESTROY_SESSION] = (nfsd4_dec)nfsd4_decode_destroy_session,
Bryan Schumakere1ca12d2011-07-13 11:04:21 -04001845 [OP_FREE_STATEID] = (nfsd4_dec)nfsd4_decode_free_stateid,
Randy Dunlap9064caa2009-04-28 16:48:25 -07001846 [OP_GET_DIR_DELEGATION] = (nfsd4_dec)nfsd4_decode_notsupp,
Christoph Hellwig9cf514c2014-05-05 13:11:59 +02001847#ifdef CONFIG_NFSD_PNFS
1848 [OP_GETDEVICEINFO] = (nfsd4_dec)nfsd4_decode_getdeviceinfo,
1849 [OP_GETDEVICELIST] = (nfsd4_dec)nfsd4_decode_notsupp,
1850 [OP_LAYOUTCOMMIT] = (nfsd4_dec)nfsd4_decode_layoutcommit,
1851 [OP_LAYOUTGET] = (nfsd4_dec)nfsd4_decode_layoutget,
1852 [OP_LAYOUTRETURN] = (nfsd4_dec)nfsd4_decode_layoutreturn,
1853#else
Randy Dunlap9064caa2009-04-28 16:48:25 -07001854 [OP_GETDEVICEINFO] = (nfsd4_dec)nfsd4_decode_notsupp,
1855 [OP_GETDEVICELIST] = (nfsd4_dec)nfsd4_decode_notsupp,
1856 [OP_LAYOUTCOMMIT] = (nfsd4_dec)nfsd4_decode_notsupp,
1857 [OP_LAYOUTGET] = (nfsd4_dec)nfsd4_decode_notsupp,
1858 [OP_LAYOUTRETURN] = (nfsd4_dec)nfsd4_decode_notsupp,
Christoph Hellwig9cf514c2014-05-05 13:11:59 +02001859#endif
J. Bruce Fields04f4ad12010-12-16 09:51:13 -05001860 [OP_SECINFO_NO_NAME] = (nfsd4_dec)nfsd4_decode_secinfo_no_name,
Randy Dunlap9064caa2009-04-28 16:48:25 -07001861 [OP_SEQUENCE] = (nfsd4_dec)nfsd4_decode_sequence,
1862 [OP_SET_SSV] = (nfsd4_dec)nfsd4_decode_notsupp,
Bryan Schumaker17456802011-07-13 10:50:48 -04001863 [OP_TEST_STATEID] = (nfsd4_dec)nfsd4_decode_test_stateid,
Randy Dunlap9064caa2009-04-28 16:48:25 -07001864 [OP_WANT_DELEGATION] = (nfsd4_dec)nfsd4_decode_notsupp,
Mi Jinlong345c2842011-10-20 17:51:39 +08001865 [OP_DESTROY_CLIENTID] = (nfsd4_dec)nfsd4_decode_destroy_clientid,
J. Bruce Fields4dc6ec02010-04-19 15:11:28 -04001866 [OP_RECLAIM_COMPLETE] = (nfsd4_dec)nfsd4_decode_reclaim_complete,
Anna Schumaker87a15a82014-09-26 13:58:26 -04001867
1868 /* new operations for NFSv4.2 */
Anna Schumaker95d871f2014-11-07 14:44:26 -05001869 [OP_ALLOCATE] = (nfsd4_dec)nfsd4_decode_fallocate,
Anna Schumaker29ae7f92016-09-07 15:57:30 -04001870 [OP_COPY] = (nfsd4_dec)nfsd4_decode_copy,
Anna Schumaker87a15a82014-09-26 13:58:26 -04001871 [OP_COPY_NOTIFY] = (nfsd4_dec)nfsd4_decode_notsupp,
Anna Schumakerb0cb9082014-11-07 14:44:27 -05001872 [OP_DEALLOCATE] = (nfsd4_dec)nfsd4_decode_fallocate,
Anna Schumaker87a15a82014-09-26 13:58:26 -04001873 [OP_IO_ADVISE] = (nfsd4_dec)nfsd4_decode_notsupp,
1874 [OP_LAYOUTERROR] = (nfsd4_dec)nfsd4_decode_notsupp,
1875 [OP_LAYOUTSTATS] = (nfsd4_dec)nfsd4_decode_notsupp,
1876 [OP_OFFLOAD_CANCEL] = (nfsd4_dec)nfsd4_decode_notsupp,
1877 [OP_OFFLOAD_STATUS] = (nfsd4_dec)nfsd4_decode_notsupp,
1878 [OP_READ_PLUS] = (nfsd4_dec)nfsd4_decode_notsupp,
Anna Schumaker24bab492014-09-26 13:58:27 -04001879 [OP_SEEK] = (nfsd4_dec)nfsd4_decode_seek,
Anna Schumaker87a15a82014-09-26 13:58:26 -04001880 [OP_WRITE_SAME] = (nfsd4_dec)nfsd4_decode_notsupp,
Christoph Hellwigffa01602015-12-03 12:59:52 +01001881 [OP_CLONE] = (nfsd4_dec)nfsd4_decode_clone,
Andy Adamson2db134e2009-04-03 08:27:55 +03001882};
1883
Anna Schumakere1a90eb2013-10-30 10:00:20 -04001884static inline bool
1885nfsd4_opnum_in_range(struct nfsd4_compoundargs *argp, struct nfsd4_op *op)
1886{
Anna Schumaker8217d142013-10-30 13:38:13 -04001887 if (op->opnum < FIRST_NFS4_OP)
Anna Schumakere1a90eb2013-10-30 10:00:20 -04001888 return false;
Anna Schumaker8217d142013-10-30 13:38:13 -04001889 else if (argp->minorversion == 0 && op->opnum > LAST_NFS40_OP)
Anna Schumakere1a90eb2013-10-30 10:00:20 -04001890 return false;
Anna Schumaker8217d142013-10-30 13:38:13 -04001891 else if (argp->minorversion == 1 && op->opnum > LAST_NFS41_OP)
1892 return false;
1893 else if (argp->minorversion == 2 && op->opnum > LAST_NFS42_OP)
Anna Schumakere1a90eb2013-10-30 10:00:20 -04001894 return false;
1895 return true;
1896}
Benny Halevyf2feb962008-07-02 11:14:22 +03001897
Benny Halevy347e0ad2008-07-02 11:13:41 +03001898static __be32
Linus Torvalds1da177e2005-04-16 15:20:36 -07001899nfsd4_decode_compound(struct nfsd4_compoundargs *argp)
1900{
1901 DECODE_HEAD;
1902 struct nfsd4_op *op;
J. Bruce Fields10910062011-01-24 12:11:02 -05001903 bool cachethis = false;
J. Bruce Fieldsa5cddc82014-05-12 18:10:58 -04001904 int auth_slack= argp->rqstp->rq_auth_slack;
1905 int max_reply = auth_slack + 8; /* opcnt, status */
J. Bruce Fieldsb0e35fd2014-02-04 10:36:59 -05001906 int readcount = 0;
1907 int readbytes = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001908 int i;
1909
Linus Torvalds1da177e2005-04-16 15:20:36 -07001910 READ_BUF(4);
J. Bruce Fields06553992014-06-02 12:32:51 -04001911 argp->taglen = be32_to_cpup(p++);
J. Bruce Fields4aed9c42016-02-29 20:21:21 -05001912 READ_BUF(argp->taglen);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001913 SAVEMEM(argp->tag, argp->taglen);
J. Bruce Fields4aed9c42016-02-29 20:21:21 -05001914 READ_BUF(8);
J. Bruce Fields06553992014-06-02 12:32:51 -04001915 argp->minorversion = be32_to_cpup(p++);
1916 argp->opcnt = be32_to_cpup(p++);
J. Bruce Fields4f0cefb2014-03-11 15:39:13 -04001917 max_reply += 4 + (XDR_QUADLEN(argp->taglen) << 2);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001918
1919 if (argp->taglen > NFSD4_MAX_TAGLEN)
1920 goto xdr_error;
J. Bruce Fields00781172017-11-15 12:30:27 -05001921 /*
1922 * NFS4ERR_RESOURCE is a more helpful error than GARBAGE_ARGS
1923 * here, so we return success at the xdr level so that
1924 * nfsd4_proc can handle this is an NFS-level error.
1925 */
1926 if (argp->opcnt > NFSD_MAX_OPS_PER_COMPOUND)
1927 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001928
Tobias Klausere8c96f82006-03-24 03:15:34 -08001929 if (argp->opcnt > ARRAY_SIZE(argp->iops)) {
J. Bruce Fields5d6031c2014-07-17 16:20:39 -04001930 argp->ops = kzalloc(argp->opcnt * sizeof(*argp->ops), GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001931 if (!argp->ops) {
1932 argp->ops = argp->iops;
Chuck Lever817cb9d2007-09-11 18:01:20 -04001933 dprintk("nfsd: couldn't allocate room for COMPOUND\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001934 goto xdr_error;
1935 }
1936 }
1937
Anna Schumakere1a90eb2013-10-30 10:00:20 -04001938 if (argp->minorversion > NFSD_SUPPORTED_MINOR_VERSION)
Benny Halevy30cff1f2008-07-02 11:13:18 +03001939 argp->opcnt = 0;
1940
Linus Torvalds1da177e2005-04-16 15:20:36 -07001941 for (i = 0; i < argp->opcnt; i++) {
1942 op = &argp->ops[i];
1943 op->replay = NULL;
1944
J. Bruce Fields8a61b182012-11-16 22:28:38 -05001945 READ_BUF(4);
J. Bruce Fields06553992014-06-02 12:32:51 -04001946 op->opnum = be32_to_cpup(p++);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001947
Anna Schumakere1a90eb2013-10-30 10:00:20 -04001948 if (nfsd4_opnum_in_range(argp, op))
1949 op->status = nfsd4_dec_ops[op->opnum](argp, &op->u);
Benny Halevy347e0ad2008-07-02 11:13:41 +03001950 else {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001951 op->opnum = OP_ILLEGAL;
1952 op->status = nfserr_op_illegal;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001953 }
J. Bruce Fieldsf4f9ef42017-07-06 17:51:29 -04001954 op->opdesc = OPDESC(op);
J. Bruce Fields10910062011-01-24 12:11:02 -05001955 /*
1956 * We'll try to cache the result in the DRC if any one
1957 * op in the compound wants to be cached:
1958 */
1959 cachethis |= nfsd4_cache_this_op(op);
J. Bruce Fields6ff40de2013-11-05 15:07:16 -05001960
J. Bruce Fieldsb0e35fd2014-02-04 10:36:59 -05001961 if (op->opnum == OP_READ) {
1962 readcount++;
1963 readbytes += nfsd4_max_reply(argp->rqstp, op);
1964 } else
1965 max_reply += nfsd4_max_reply(argp->rqstp, op);
J. Bruce Fieldsf7b43d02014-08-12 11:41:40 -04001966 /*
Kinglong Mee7323f0d2017-02-03 22:51:46 +08001967 * OP_LOCK and OP_LOCKT may return a conflicting lock.
1968 * (Special case because it will just skip encoding this
1969 * if it runs out of xdr buffer space, and it is the only
1970 * operation that behaves this way.)
J. Bruce Fieldsf7b43d02014-08-12 11:41:40 -04001971 */
Kinglong Mee7323f0d2017-02-03 22:51:46 +08001972 if (op->opnum == OP_LOCK || op->opnum == OP_LOCKT)
J. Bruce Fieldsf7b43d02014-08-12 11:41:40 -04001973 max_reply += NFS4_OPAQUE_LIMIT;
J. Bruce Fieldse372ba62014-05-19 12:27:11 -04001974
1975 if (op->status) {
1976 argp->opcnt = i+1;
1977 break;
1978 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001979 }
J. Bruce Fields10910062011-01-24 12:11:02 -05001980 /* Sessions make the DRC unnecessary: */
1981 if (argp->minorversion)
1982 cachethis = false;
J. Bruce Fieldsb0e35fd2014-02-04 10:36:59 -05001983 svc_reserve(argp->rqstp, max_reply + readbytes);
J. Bruce Fields10910062011-01-24 12:11:02 -05001984 argp->rqstp->rq_cachetype = cachethis ? RC_REPLBUFF : RC_NOCACHE;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001985
J. Bruce Fieldsa5cddc82014-05-12 18:10:58 -04001986 if (readcount > 1 || max_reply > PAGE_SIZE - auth_slack)
Jeff Layton779fb0f2014-11-19 07:51:18 -05001987 clear_bit(RQ_SPLICE_OK, &argp->rqstp->rq_flags);
J. Bruce Fieldsb0e35fd2014-02-04 10:36:59 -05001988
Linus Torvalds1da177e2005-04-16 15:20:36 -07001989 DECODE_TAIL;
1990}
Linus Torvalds1da177e2005-04-16 15:20:36 -07001991
NeilBrownb8800922017-01-30 17:17:00 +11001992static __be32 *encode_change(__be32 *p, struct kstat *stat, struct inode *inode,
1993 struct svc_export *exp)
J. Bruce Fieldsc654b8a2009-04-16 17:33:25 -04001994{
NeilBrownb8800922017-01-30 17:17:00 +11001995 if (exp->ex_flags & NFSEXP_V4ROOT) {
1996 *p++ = cpu_to_be32(convert_to_wallclock(exp->cd->flush_time));
1997 *p++ = 0;
1998 } else if (IS_I_VERSION(inode)) {
Amir Goldstein39ca1bf2018-01-03 17:14:35 +02001999 p = xdr_encode_hyper(p, nfsd4_change_attribute(stat, inode));
J. Bruce Fieldsc654b8a2009-04-16 17:33:25 -04002000 } else {
J. Bruce Fieldsd05d5742014-03-22 18:48:39 -04002001 *p++ = cpu_to_be32(stat->ctime.tv_sec);
2002 *p++ = cpu_to_be32(stat->ctime.tv_nsec);
J. Bruce Fieldsc654b8a2009-04-16 17:33:25 -04002003 }
J. Bruce Fieldsd05d5742014-03-22 18:48:39 -04002004 return p;
J. Bruce Fieldsc654b8a2009-04-16 17:33:25 -04002005}
2006
J. Bruce Fields16945142018-04-25 14:34:11 -04002007/*
2008 * ctime (in NFSv4, time_metadata) is not writeable, and the client
2009 * doesn't really care what resolution could theoretically be stored by
2010 * the filesystem.
2011 *
2012 * The client cares how close together changes can be while still
2013 * guaranteeing ctime changes. For most filesystems (which have
2014 * timestamps with nanosecond fields) that is limited by the resolution
2015 * of the time returned from current_time() (which I'm assuming to be
2016 * 1/HZ).
2017 */
2018static __be32 *encode_time_delta(__be32 *p, struct inode *inode)
2019{
2020 struct timespec ts;
2021 u32 ns;
2022
2023 ns = max_t(u32, NSEC_PER_SEC/HZ, inode->i_sb->s_time_gran);
2024 ts = ns_to_timespec(ns);
2025
2026 p = xdr_encode_hyper(p, ts.tv_sec);
2027 *p++ = cpu_to_be32(ts.tv_nsec);
2028
2029 return p;
2030}
2031
J. Bruce Fieldsd05d5742014-03-22 18:48:39 -04002032static __be32 *encode_cinfo(__be32 *p, struct nfsd4_change_info *c)
J. Bruce Fieldsc654b8a2009-04-16 17:33:25 -04002033{
J. Bruce Fieldsd05d5742014-03-22 18:48:39 -04002034 *p++ = cpu_to_be32(c->atomic);
J. Bruce Fieldsc654b8a2009-04-16 17:33:25 -04002035 if (c->change_supported) {
J. Bruce Fieldsd05d5742014-03-22 18:48:39 -04002036 p = xdr_encode_hyper(p, c->before_change);
2037 p = xdr_encode_hyper(p, c->after_change);
J. Bruce Fieldsc654b8a2009-04-16 17:33:25 -04002038 } else {
J. Bruce Fieldsd05d5742014-03-22 18:48:39 -04002039 *p++ = cpu_to_be32(c->before_ctime_sec);
2040 *p++ = cpu_to_be32(c->before_ctime_nsec);
2041 *p++ = cpu_to_be32(c->after_ctime_sec);
2042 *p++ = cpu_to_be32(c->after_ctime_nsec);
J. Bruce Fieldsc654b8a2009-04-16 17:33:25 -04002043 }
J. Bruce Fieldsd05d5742014-03-22 18:48:39 -04002044 return p;
J. Bruce Fieldsc654b8a2009-04-16 17:33:25 -04002045}
Linus Torvalds1da177e2005-04-16 15:20:36 -07002046
J.Bruce Fields81c3f412006-10-04 02:16:19 -07002047/* Encode as an array of strings the string given with components
Weston Andros Adamsone7a04442012-04-24 11:07:59 -04002048 * separated @sep, escaped with esc_enter and esc_exit.
J.Bruce Fields81c3f412006-10-04 02:16:19 -07002049 */
J. Bruce Fieldsddd1ea52013-08-27 21:32:25 -04002050static __be32 nfsd4_encode_components_esc(struct xdr_stream *xdr, char sep,
2051 char *components, char esc_enter,
2052 char esc_exit)
J.Bruce Fields81c3f412006-10-04 02:16:19 -07002053{
J. Bruce Fieldsddd1ea52013-08-27 21:32:25 -04002054 __be32 *p;
J. Bruce Fields082d4bd2013-08-29 15:42:52 -04002055 __be32 pathlen;
2056 int pathlen_offset;
J.Bruce Fields81c3f412006-10-04 02:16:19 -07002057 int strlen, count=0;
Weston Andros Adamsone7a04442012-04-24 11:07:59 -04002058 char *str, *end, *next;
J.Bruce Fields81c3f412006-10-04 02:16:19 -07002059
2060 dprintk("nfsd4_encode_components(%s)\n", components);
J. Bruce Fields082d4bd2013-08-29 15:42:52 -04002061
2062 pathlen_offset = xdr->buf->len;
J. Bruce Fieldsddd1ea52013-08-27 21:32:25 -04002063 p = xdr_reserve_space(xdr, 4);
2064 if (!p)
J.Bruce Fields81c3f412006-10-04 02:16:19 -07002065 return nfserr_resource;
J. Bruce Fields082d4bd2013-08-29 15:42:52 -04002066 p++; /* We will fill this in with @count later */
2067
J.Bruce Fields81c3f412006-10-04 02:16:19 -07002068 end = str = components;
2069 while (*end) {
Weston Andros Adamsone7a04442012-04-24 11:07:59 -04002070 bool found_esc = false;
2071
2072 /* try to parse as esc_start, ..., esc_end, sep */
2073 if (*str == esc_enter) {
2074 for (; *end && (*end != esc_exit); end++)
2075 /* find esc_exit or end of string */;
2076 next = end + 1;
2077 if (*end && (!*next || *next == sep)) {
2078 str++;
2079 found_esc = true;
2080 }
2081 }
2082
2083 if (!found_esc)
2084 for (; *end && (*end != sep); end++)
2085 /* find sep or end of string */;
2086
J.Bruce Fields81c3f412006-10-04 02:16:19 -07002087 strlen = end - str;
2088 if (strlen) {
J. Bruce Fieldsddd1ea52013-08-27 21:32:25 -04002089 p = xdr_reserve_space(xdr, strlen + 4);
2090 if (!p)
J.Bruce Fields81c3f412006-10-04 02:16:19 -07002091 return nfserr_resource;
J. Bruce Fields0c0c2672014-03-22 18:43:16 -04002092 p = xdr_encode_opaque(p, str, strlen);
J.Bruce Fields81c3f412006-10-04 02:16:19 -07002093 count++;
2094 }
2095 else
2096 end++;
Benjamin Coddington5a64e562014-12-07 16:05:47 -05002097 if (found_esc)
2098 end = next;
2099
J.Bruce Fields81c3f412006-10-04 02:16:19 -07002100 str = end;
2101 }
Benjamin Coddingtonbf7491f2014-12-07 16:05:48 -05002102 pathlen = htonl(count);
J. Bruce Fields082d4bd2013-08-29 15:42:52 -04002103 write_bytes_to_xdr_buf(xdr->buf, pathlen_offset, &pathlen, 4);
J.Bruce Fields81c3f412006-10-04 02:16:19 -07002104 return 0;
2105}
2106
Weston Andros Adamsone7a04442012-04-24 11:07:59 -04002107/* Encode as an array of strings the string given with components
2108 * separated @sep.
2109 */
J. Bruce Fieldsddd1ea52013-08-27 21:32:25 -04002110static __be32 nfsd4_encode_components(struct xdr_stream *xdr, char sep,
2111 char *components)
Weston Andros Adamsone7a04442012-04-24 11:07:59 -04002112{
J. Bruce Fieldsddd1ea52013-08-27 21:32:25 -04002113 return nfsd4_encode_components_esc(xdr, sep, components, 0, 0);
Weston Andros Adamsone7a04442012-04-24 11:07:59 -04002114}
2115
J.Bruce Fields81c3f412006-10-04 02:16:19 -07002116/*
2117 * encode a location element of a fs_locations structure
2118 */
J. Bruce Fieldsddd1ea52013-08-27 21:32:25 -04002119static __be32 nfsd4_encode_fs_location4(struct xdr_stream *xdr,
2120 struct nfsd4_fs_location *location)
J.Bruce Fields81c3f412006-10-04 02:16:19 -07002121{
Al Virob37ad282006-10-19 23:28:59 -07002122 __be32 status;
J.Bruce Fields81c3f412006-10-04 02:16:19 -07002123
J. Bruce Fieldsddd1ea52013-08-27 21:32:25 -04002124 status = nfsd4_encode_components_esc(xdr, ':', location->hosts,
Weston Andros Adamsone7a04442012-04-24 11:07:59 -04002125 '[', ']');
J.Bruce Fields81c3f412006-10-04 02:16:19 -07002126 if (status)
2127 return status;
J. Bruce Fieldsddd1ea52013-08-27 21:32:25 -04002128 status = nfsd4_encode_components(xdr, '/', location->path);
J.Bruce Fields81c3f412006-10-04 02:16:19 -07002129 if (status)
2130 return status;
J.Bruce Fields81c3f412006-10-04 02:16:19 -07002131 return 0;
2132}
2133
2134/*
Trond Myklebusted748aa2011-09-12 19:37:06 -04002135 * Encode a path in RFC3530 'pathname4' format
J.Bruce Fields81c3f412006-10-04 02:16:19 -07002136 */
J. Bruce Fieldsddd1ea52013-08-27 21:32:25 -04002137static __be32 nfsd4_encode_path(struct xdr_stream *xdr,
2138 const struct path *root,
2139 const struct path *path)
J.Bruce Fields81c3f412006-10-04 02:16:19 -07002140{
Al Viro301f0262013-09-01 16:06:39 -04002141 struct path cur = *path;
J. Bruce Fieldsddd1ea52013-08-27 21:32:25 -04002142 __be32 *p;
Trond Myklebusted748aa2011-09-12 19:37:06 -04002143 struct dentry **components = NULL;
2144 unsigned int ncomponents = 0;
2145 __be32 err = nfserr_jukebox;
J.Bruce Fields81c3f412006-10-04 02:16:19 -07002146
Trond Myklebusted748aa2011-09-12 19:37:06 -04002147 dprintk("nfsd4_encode_components(");
J.Bruce Fields81c3f412006-10-04 02:16:19 -07002148
Trond Myklebusted748aa2011-09-12 19:37:06 -04002149 path_get(&cur);
2150 /* First walk the path up to the nfsd root, and store the
2151 * dentries/path components in an array.
2152 */
2153 for (;;) {
Kinglong Meeb77a4b22015-03-15 23:13:32 +08002154 if (path_equal(&cur, root))
Trond Myklebusted748aa2011-09-12 19:37:06 -04002155 break;
2156 if (cur.dentry == cur.mnt->mnt_root) {
2157 if (follow_up(&cur))
2158 continue;
2159 goto out_free;
2160 }
2161 if ((ncomponents & 15) == 0) {
2162 struct dentry **new;
2163 new = krealloc(components,
2164 sizeof(*new) * (ncomponents + 16),
2165 GFP_KERNEL);
2166 if (!new)
2167 goto out_free;
2168 components = new;
2169 }
2170 components[ncomponents++] = cur.dentry;
2171 cur.dentry = dget_parent(cur.dentry);
J.Bruce Fields81c3f412006-10-04 02:16:19 -07002172 }
J. Bruce Fieldsddd1ea52013-08-27 21:32:25 -04002173 err = nfserr_resource;
2174 p = xdr_reserve_space(xdr, 4);
2175 if (!p)
Trond Myklebusted748aa2011-09-12 19:37:06 -04002176 goto out_free;
J. Bruce Fieldsc373b0a2014-03-22 17:09:18 -04002177 *p++ = cpu_to_be32(ncomponents);
Trond Myklebusted748aa2011-09-12 19:37:06 -04002178
2179 while (ncomponents) {
2180 struct dentry *dentry = components[ncomponents - 1];
Al Viro301f0262013-09-01 16:06:39 -04002181 unsigned int len;
Trond Myklebusted748aa2011-09-12 19:37:06 -04002182
Al Viro301f0262013-09-01 16:06:39 -04002183 spin_lock(&dentry->d_lock);
2184 len = dentry->d_name.len;
J. Bruce Fieldsddd1ea52013-08-27 21:32:25 -04002185 p = xdr_reserve_space(xdr, len + 4);
2186 if (!p) {
Al Viro301f0262013-09-01 16:06:39 -04002187 spin_unlock(&dentry->d_lock);
Trond Myklebusted748aa2011-09-12 19:37:06 -04002188 goto out_free;
Al Viro301f0262013-09-01 16:06:39 -04002189 }
J. Bruce Fields0c0c2672014-03-22 18:43:16 -04002190 p = xdr_encode_opaque(p, dentry->d_name.name, len);
Al Viroa4555892014-10-21 20:11:25 -04002191 dprintk("/%pd", dentry);
Al Viro301f0262013-09-01 16:06:39 -04002192 spin_unlock(&dentry->d_lock);
Trond Myklebusted748aa2011-09-12 19:37:06 -04002193 dput(dentry);
2194 ncomponents--;
2195 }
2196
Trond Myklebusted748aa2011-09-12 19:37:06 -04002197 err = 0;
2198out_free:
2199 dprintk(")\n");
2200 while (ncomponents)
2201 dput(components[--ncomponents]);
2202 kfree(components);
2203 path_put(&cur);
2204 return err;
2205}
2206
J. Bruce Fieldsddd1ea52013-08-27 21:32:25 -04002207static __be32 nfsd4_encode_fsloc_fsroot(struct xdr_stream *xdr,
2208 struct svc_rqst *rqstp, const struct path *path)
Trond Myklebusted748aa2011-09-12 19:37:06 -04002209{
2210 struct svc_export *exp_ps;
2211 __be32 res;
2212
2213 exp_ps = rqst_find_fsidzero_export(rqstp);
2214 if (IS_ERR(exp_ps))
2215 return nfserrno(PTR_ERR(exp_ps));
J. Bruce Fieldsddd1ea52013-08-27 21:32:25 -04002216 res = nfsd4_encode_path(xdr, &exp_ps->ex_path, path);
Trond Myklebusted748aa2011-09-12 19:37:06 -04002217 exp_put(exp_ps);
2218 return res;
J.Bruce Fields81c3f412006-10-04 02:16:19 -07002219}
2220
2221/*
2222 * encode a fs_locations structure
2223 */
J. Bruce Fieldsddd1ea52013-08-27 21:32:25 -04002224static __be32 nfsd4_encode_fs_locations(struct xdr_stream *xdr,
2225 struct svc_rqst *rqstp, struct svc_export *exp)
J.Bruce Fields81c3f412006-10-04 02:16:19 -07002226{
Al Virob37ad282006-10-19 23:28:59 -07002227 __be32 status;
Al Virocc45f012006-10-19 23:28:44 -07002228 int i;
J. Bruce Fieldsddd1ea52013-08-27 21:32:25 -04002229 __be32 *p;
J.Bruce Fields81c3f412006-10-04 02:16:19 -07002230 struct nfsd4_fs_locations *fslocs = &exp->ex_fslocs;
J.Bruce Fields81c3f412006-10-04 02:16:19 -07002231
J. Bruce Fieldsddd1ea52013-08-27 21:32:25 -04002232 status = nfsd4_encode_fsloc_fsroot(xdr, rqstp, &exp->ex_path);
J.Bruce Fields81c3f412006-10-04 02:16:19 -07002233 if (status)
2234 return status;
J. Bruce Fieldsddd1ea52013-08-27 21:32:25 -04002235 p = xdr_reserve_space(xdr, 4);
2236 if (!p)
J.Bruce Fields81c3f412006-10-04 02:16:19 -07002237 return nfserr_resource;
J. Bruce Fieldsc373b0a2014-03-22 17:09:18 -04002238 *p++ = cpu_to_be32(fslocs->locations_count);
J.Bruce Fields81c3f412006-10-04 02:16:19 -07002239 for (i=0; i<fslocs->locations_count; i++) {
J. Bruce Fieldsddd1ea52013-08-27 21:32:25 -04002240 status = nfsd4_encode_fs_location4(xdr, &fslocs->locations[i]);
J.Bruce Fields81c3f412006-10-04 02:16:19 -07002241 if (status)
2242 return status;
2243 }
J.Bruce Fields81c3f412006-10-04 02:16:19 -07002244 return 0;
2245}
Linus Torvalds1da177e2005-04-16 15:20:36 -07002246
J. Bruce Fields3d2544b2011-08-15 11:49:30 -04002247static u32 nfs4_file_type(umode_t mode)
2248{
2249 switch (mode & S_IFMT) {
2250 case S_IFIFO: return NF4FIFO;
2251 case S_IFCHR: return NF4CHR;
2252 case S_IFDIR: return NF4DIR;
2253 case S_IFBLK: return NF4BLK;
2254 case S_IFLNK: return NF4LNK;
2255 case S_IFREG: return NF4REG;
2256 case S_IFSOCK: return NF4SOCK;
2257 default: return NF4BAD;
2258 };
2259}
Linus Torvalds1da177e2005-04-16 15:20:36 -07002260
Al Virob37ad282006-10-19 23:28:59 -07002261static inline __be32
J. Bruce Fieldsddd1ea52013-08-27 21:32:25 -04002262nfsd4_encode_aclname(struct xdr_stream *xdr, struct svc_rqst *rqstp,
2263 struct nfs4_ace *ace)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002264{
J. Bruce Fields35541162014-01-08 09:49:01 -05002265 if (ace->whotype != NFS4_ACL_WHO_NAMED)
J. Bruce Fieldsddd1ea52013-08-27 21:32:25 -04002266 return nfs4_acl_write_who(xdr, ace->whotype);
J. Bruce Fields35541162014-01-08 09:49:01 -05002267 else if (ace->flag & NFS4_ACE_IDENTIFIER_GROUP)
J. Bruce Fieldsddd1ea52013-08-27 21:32:25 -04002268 return nfsd4_encode_group(xdr, rqstp, ace->who_gid);
J. Bruce Fields35541162014-01-08 09:49:01 -05002269 else
J. Bruce Fieldsddd1ea52013-08-27 21:32:25 -04002270 return nfsd4_encode_user(xdr, rqstp, ace->who_uid);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002271}
2272
Kinglong Mee6896f152015-07-30 21:52:44 +08002273static inline __be32
Jeff Layton8a4c3922016-07-10 15:55:58 -04002274nfsd4_encode_layout_types(struct xdr_stream *xdr, u32 layout_types)
Kinglong Mee6896f152015-07-30 21:52:44 +08002275{
Jeff Layton8a4c3922016-07-10 15:55:58 -04002276 __be32 *p;
2277 unsigned long i = hweight_long(layout_types);
Kinglong Mee6896f152015-07-30 21:52:44 +08002278
Jeff Layton8a4c3922016-07-10 15:55:58 -04002279 p = xdr_reserve_space(xdr, 4 + 4 * i);
2280 if (!p)
2281 return nfserr_resource;
2282
2283 *p++ = cpu_to_be32(i);
2284
2285 for (i = LAYOUT_NFSV4_1_FILES; i < LAYOUT_TYPE_MAX; ++i)
2286 if (layout_types & (1 << i))
2287 *p++ = cpu_to_be32(i);
Kinglong Mee6896f152015-07-30 21:52:44 +08002288
2289 return 0;
2290}
2291
J.Bruce Fields42ca0992006-10-04 02:16:20 -07002292#define WORD0_ABSENT_FS_ATTRS (FATTR4_WORD0_FS_LOCATIONS | FATTR4_WORD0_FSID | \
2293 FATTR4_WORD0_RDATTR_ERROR)
2294#define WORD1_ABSENT_FS_ATTRS FATTR4_WORD1_MOUNTED_ON_FILEID
Kinglong Meec2227a32015-07-07 10:16:37 +08002295#define WORD2_ABSENT_FS_ATTRS 0
J.Bruce Fields42ca0992006-10-04 02:16:20 -07002296
David Quigley18032ca2013-05-02 13:19:10 -04002297#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
2298static inline __be32
J. Bruce Fieldsddd1ea52013-08-27 21:32:25 -04002299nfsd4_encode_security_label(struct xdr_stream *xdr, struct svc_rqst *rqstp,
2300 void *context, int len)
David Quigley18032ca2013-05-02 13:19:10 -04002301{
J. Bruce Fieldsddd1ea52013-08-27 21:32:25 -04002302 __be32 *p;
David Quigley18032ca2013-05-02 13:19:10 -04002303
J. Bruce Fieldsddd1ea52013-08-27 21:32:25 -04002304 p = xdr_reserve_space(xdr, len + 4 + 4 + 4);
2305 if (!p)
David Quigley18032ca2013-05-02 13:19:10 -04002306 return nfserr_resource;
2307
2308 /*
2309 * For now we use a 0 here to indicate the null translation; in
2310 * the future we may place a call to translation code here.
2311 */
J. Bruce Fieldsc373b0a2014-03-22 17:09:18 -04002312 *p++ = cpu_to_be32(0); /* lfs */
2313 *p++ = cpu_to_be32(0); /* pi */
David Quigley18032ca2013-05-02 13:19:10 -04002314 p = xdr_encode_opaque(p, context, len);
David Quigley18032ca2013-05-02 13:19:10 -04002315 return 0;
2316}
2317#else
2318static inline __be32
J. Bruce Fieldsddd1ea52013-08-27 21:32:25 -04002319nfsd4_encode_security_label(struct xdr_stream *xdr, struct svc_rqst *rqstp,
2320 void *context, int len)
David Quigley18032ca2013-05-02 13:19:10 -04002321{ return 0; }
2322#endif
2323
Kinglong Meec2227a32015-07-07 10:16:37 +08002324static __be32 fattr_handle_absent_fs(u32 *bmval0, u32 *bmval1, u32 *bmval2, u32 *rdattr_err)
J.Bruce Fields42ca0992006-10-04 02:16:20 -07002325{
2326 /* As per referral draft: */
2327 if (*bmval0 & ~WORD0_ABSENT_FS_ATTRS ||
2328 *bmval1 & ~WORD1_ABSENT_FS_ATTRS) {
2329 if (*bmval0 & FATTR4_WORD0_RDATTR_ERROR ||
2330 *bmval0 & FATTR4_WORD0_FS_LOCATIONS)
2331 *rdattr_err = NFSERR_MOVED;
2332 else
2333 return nfserr_moved;
2334 }
2335 *bmval0 &= WORD0_ABSENT_FS_ATTRS;
2336 *bmval1 &= WORD1_ABSENT_FS_ATTRS;
Kinglong Meec2227a32015-07-07 10:16:37 +08002337 *bmval2 &= WORD2_ABSENT_FS_ATTRS;
J.Bruce Fields42ca0992006-10-04 02:16:20 -07002338 return 0;
2339}
Linus Torvalds1da177e2005-04-16 15:20:36 -07002340
J. Bruce Fieldsae7095a2012-10-01 17:50:56 -04002341
2342static int get_parent_attributes(struct svc_export *exp, struct kstat *stat)
2343{
2344 struct path path = exp->ex_path;
2345 int err;
2346
2347 path_get(&path);
2348 while (follow_up(&path)) {
2349 if (path.dentry != path.mnt->mnt_root)
2350 break;
2351 }
David Howellsa528d352017-01-31 16:46:22 +00002352 err = vfs_getattr(&path, stat, STATX_BASIC_STATS, AT_STATX_SYNC_AS_STAT);
J. Bruce Fieldsae7095a2012-10-01 17:50:56 -04002353 path_put(&path);
2354 return err;
2355}
2356
Kinglong Mee75976de2015-07-30 21:55:30 +08002357static __be32
2358nfsd4_encode_bitmap(struct xdr_stream *xdr, u32 bmval0, u32 bmval1, u32 bmval2)
2359{
2360 __be32 *p;
2361
2362 if (bmval2) {
2363 p = xdr_reserve_space(xdr, 16);
2364 if (!p)
2365 goto out_resource;
2366 *p++ = cpu_to_be32(3);
2367 *p++ = cpu_to_be32(bmval0);
2368 *p++ = cpu_to_be32(bmval1);
2369 *p++ = cpu_to_be32(bmval2);
2370 } else if (bmval1) {
2371 p = xdr_reserve_space(xdr, 12);
2372 if (!p)
2373 goto out_resource;
2374 *p++ = cpu_to_be32(2);
2375 *p++ = cpu_to_be32(bmval0);
2376 *p++ = cpu_to_be32(bmval1);
2377 } else {
2378 p = xdr_reserve_space(xdr, 8);
2379 if (!p)
2380 goto out_resource;
2381 *p++ = cpu_to_be32(1);
2382 *p++ = cpu_to_be32(bmval0);
2383 }
2384
2385 return 0;
2386out_resource:
2387 return nfserr_resource;
2388}
2389
Linus Torvalds1da177e2005-04-16 15:20:36 -07002390/*
2391 * Note: @fhp can be NULL; in this case, we might have to compose the filehandle
2392 * ourselves.
Linus Torvalds1da177e2005-04-16 15:20:36 -07002393 */
Jeff Laytonda2ebce2014-05-30 09:09:25 -04002394static __be32
J. Bruce Fieldsd5184652013-08-26 16:04:46 -04002395nfsd4_encode_fattr(struct xdr_stream *xdr, struct svc_fh *fhp,
2396 struct svc_export *exp,
2397 struct dentry *dentry, u32 *bmval,
Frank Filz406a7ea2007-11-27 11:34:05 -08002398 struct svc_rqst *rqstp, int ignore_crossmnt)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002399{
2400 u32 bmval0 = bmval[0];
2401 u32 bmval1 = bmval[1];
Andy Adamson7e705702009-04-03 08:29:11 +03002402 u32 bmval2 = bmval[2];
Linus Torvalds1da177e2005-04-16 15:20:36 -07002403 struct kstat stat;
J. Bruce Fieldsd50e61362014-01-15 12:21:12 -05002404 struct svc_fh *tempfh = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002405 struct kstatfs statfs;
J. Bruce Fieldsddd1ea52013-08-27 21:32:25 -04002406 __be32 *p;
J. Bruce Fields1fcea5b2014-02-26 20:17:02 -05002407 int starting_len = xdr->buf->len;
J. Bruce Fields082d4bd2013-08-29 15:42:52 -04002408 int attrlen_offset;
2409 __be32 attrlen;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002410 u32 dummy;
2411 u64 dummy64;
J.Bruce Fields42ca0992006-10-04 02:16:20 -07002412 u32 rdattr_err = 0;
Al Virob37ad282006-10-19 23:28:59 -07002413 __be32 status;
Al Virob8dd7b92006-10-19 23:29:01 -07002414 int err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002415 struct nfs4_acl *acl = NULL;
David Quigley18032ca2013-05-02 13:19:10 -04002416 void *context = NULL;
2417 int contextlen;
2418 bool contextsupport = false;
Andy Adamson7e705702009-04-03 08:29:11 +03002419 struct nfsd4_compoundres *resp = rqstp->rq_resp;
2420 u32 minorversion = resp->cstate.minorversion;
Christoph Hellwigebabe9a2010-07-07 18:53:11 +02002421 struct path path = {
2422 .mnt = exp->ex_path.mnt,
2423 .dentry = dentry,
2424 };
Stanislav Kinsbursky3d733712012-11-27 14:11:44 +03002425 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002426
2427 BUG_ON(bmval1 & NFSD_WRITEONLY_ATTRS_WORD1);
J. Bruce Fields916d2d82016-10-18 14:18:40 -04002428 BUG_ON(!nfsd_attrs_supported(minorversion, bmval));
Linus Torvalds1da177e2005-04-16 15:20:36 -07002429
J.Bruce Fields42ca0992006-10-04 02:16:20 -07002430 if (exp->ex_fslocs.migrated) {
Kinglong Meec2227a32015-07-07 10:16:37 +08002431 status = fattr_handle_absent_fs(&bmval0, &bmval1, &bmval2, &rdattr_err);
J.Bruce Fields42ca0992006-10-04 02:16:20 -07002432 if (status)
2433 goto out;
2434 }
2435
David Howellsa528d352017-01-31 16:46:22 +00002436 err = vfs_getattr(&path, &stat, STATX_BASIC_STATS, AT_STATX_SYNC_AS_STAT);
Al Virob8dd7b92006-10-19 23:29:01 -07002437 if (err)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002438 goto out_nfserr;
Christoph Hellwig12337902014-05-28 10:46:13 +02002439 if ((bmval0 & (FATTR4_WORD0_FILES_AVAIL | FATTR4_WORD0_FILES_FREE |
2440 FATTR4_WORD0_FILES_TOTAL | FATTR4_WORD0_MAXNAME)) ||
Linus Torvalds1da177e2005-04-16 15:20:36 -07002441 (bmval1 & (FATTR4_WORD1_SPACE_AVAIL | FATTR4_WORD1_SPACE_FREE |
2442 FATTR4_WORD1_SPACE_TOTAL))) {
Christoph Hellwigebabe9a2010-07-07 18:53:11 +02002443 err = vfs_statfs(&path, &statfs);
Al Virob8dd7b92006-10-19 23:29:01 -07002444 if (err)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002445 goto out_nfserr;
2446 }
2447 if ((bmval0 & (FATTR4_WORD0_FILEHANDLE | FATTR4_WORD0_FSID)) && !fhp) {
J. Bruce Fieldsd50e61362014-01-15 12:21:12 -05002448 tempfh = kmalloc(sizeof(struct svc_fh), GFP_KERNEL);
2449 status = nfserr_jukebox;
2450 if (!tempfh)
2451 goto out;
2452 fh_init(tempfh, NFS4_FHSIZE);
2453 status = fh_compose(tempfh, exp, dentry, NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002454 if (status)
2455 goto out;
J. Bruce Fieldsd50e61362014-01-15 12:21:12 -05002456 fhp = tempfh;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002457 }
Andreas Gruenbacher0c9d65e2015-04-24 13:04:00 +02002458 if (bmval0 & FATTR4_WORD0_ACL) {
Al Virob8dd7b92006-10-19 23:29:01 -07002459 err = nfsd4_get_nfs4_acl(rqstp, dentry, &acl);
Andreas Gruenbacher0c9d65e2015-04-24 13:04:00 +02002460 if (err == -EOPNOTSUPP)
2461 bmval0 &= ~FATTR4_WORD0_ACL;
2462 else if (err == -EINVAL) {
2463 status = nfserr_attrnotsupp;
2464 goto out;
2465 } else if (err != 0)
2466 goto out_nfserr;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002467 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002468
David Quigley18032ca2013-05-02 13:19:10 -04002469#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
Kinglong Meec2227a32015-07-07 10:16:37 +08002470 if ((bmval2 & FATTR4_WORD2_SECURITY_LABEL) ||
2471 bmval0 & FATTR4_WORD0_SUPPORTED_ATTRS) {
J. Bruce Fields32ddd942017-01-03 12:30:11 -05002472 if (exp->ex_flags & NFSEXP_SECURITY_LABEL)
2473 err = security_inode_getsecctx(d_inode(dentry),
David Quigley18032ca2013-05-02 13:19:10 -04002474 &context, &contextlen);
J. Bruce Fields32ddd942017-01-03 12:30:11 -05002475 else
2476 err = -EOPNOTSUPP;
David Quigley18032ca2013-05-02 13:19:10 -04002477 contextsupport = (err == 0);
2478 if (bmval2 & FATTR4_WORD2_SECURITY_LABEL) {
2479 if (err == -EOPNOTSUPP)
2480 bmval2 &= ~FATTR4_WORD2_SECURITY_LABEL;
2481 else if (err)
2482 goto out_nfserr;
2483 }
2484 }
2485#endif /* CONFIG_NFSD_V4_SECURITY_LABEL */
2486
Kinglong Mee75976de2015-07-30 21:55:30 +08002487 status = nfsd4_encode_bitmap(xdr, bmval0, bmval1, bmval2);
2488 if (status)
2489 goto out;
J. Bruce Fields082d4bd2013-08-29 15:42:52 -04002490
2491 attrlen_offset = xdr->buf->len;
J. Bruce Fieldsddd1ea52013-08-27 21:32:25 -04002492 p = xdr_reserve_space(xdr, 4);
2493 if (!p)
2494 goto out_resource;
J. Bruce Fields082d4bd2013-08-29 15:42:52 -04002495 p++; /* to be backfilled later */
Linus Torvalds1da177e2005-04-16 15:20:36 -07002496
2497 if (bmval0 & FATTR4_WORD0_SUPPORTED_ATTRS) {
J. Bruce Fieldsdcd208692017-01-11 20:34:50 -05002498 u32 supp[3];
2499
2500 memcpy(supp, nfsd_suppattrs[minorversion], sizeof(supp));
Andy Adamson7e705702009-04-03 08:29:11 +03002501
Andreas Gruenbacher0c9d65e2015-04-24 13:04:00 +02002502 if (!IS_POSIXACL(dentry->d_inode))
J. Bruce Fields916d2d82016-10-18 14:18:40 -04002503 supp[0] &= ~FATTR4_WORD0_ACL;
David Quigley18032ca2013-05-02 13:19:10 -04002504 if (!contextsupport)
J. Bruce Fields916d2d82016-10-18 14:18:40 -04002505 supp[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
2506 if (!supp[2]) {
J. Bruce Fieldsddd1ea52013-08-27 21:32:25 -04002507 p = xdr_reserve_space(xdr, 12);
2508 if (!p)
Benny Halevy2b44f1b2010-09-30 20:47:46 +02002509 goto out_resource;
J. Bruce Fieldsc373b0a2014-03-22 17:09:18 -04002510 *p++ = cpu_to_be32(2);
J. Bruce Fields916d2d82016-10-18 14:18:40 -04002511 *p++ = cpu_to_be32(supp[0]);
2512 *p++ = cpu_to_be32(supp[1]);
Andy Adamson7e705702009-04-03 08:29:11 +03002513 } else {
J. Bruce Fieldsddd1ea52013-08-27 21:32:25 -04002514 p = xdr_reserve_space(xdr, 16);
2515 if (!p)
Benny Halevy2b44f1b2010-09-30 20:47:46 +02002516 goto out_resource;
J. Bruce Fieldsc373b0a2014-03-22 17:09:18 -04002517 *p++ = cpu_to_be32(3);
J. Bruce Fields916d2d82016-10-18 14:18:40 -04002518 *p++ = cpu_to_be32(supp[0]);
2519 *p++ = cpu_to_be32(supp[1]);
2520 *p++ = cpu_to_be32(supp[2]);
Andy Adamson7e705702009-04-03 08:29:11 +03002521 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002522 }
2523 if (bmval0 & FATTR4_WORD0_TYPE) {
J. Bruce Fieldsddd1ea52013-08-27 21:32:25 -04002524 p = xdr_reserve_space(xdr, 4);
2525 if (!p)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002526 goto out_resource;
J. Bruce Fields3d2544b2011-08-15 11:49:30 -04002527 dummy = nfs4_file_type(stat.mode);
J. Bruce Fields6b6d81372013-01-16 17:11:11 -05002528 if (dummy == NF4BAD) {
2529 status = nfserr_serverfault;
2530 goto out;
2531 }
J. Bruce Fieldsc373b0a2014-03-22 17:09:18 -04002532 *p++ = cpu_to_be32(dummy);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002533 }
2534 if (bmval0 & FATTR4_WORD0_FH_EXPIRE_TYPE) {
J. Bruce Fieldsddd1ea52013-08-27 21:32:25 -04002535 p = xdr_reserve_space(xdr, 4);
2536 if (!p)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002537 goto out_resource;
NeilBrown49640002005-06-23 22:02:58 -07002538 if (exp->ex_flags & NFSEXP_NOSUBTREECHECK)
J. Bruce Fieldsc373b0a2014-03-22 17:09:18 -04002539 *p++ = cpu_to_be32(NFS4_FH_PERSISTENT);
NeilBrown49640002005-06-23 22:02:58 -07002540 else
J. Bruce Fieldsc373b0a2014-03-22 17:09:18 -04002541 *p++ = cpu_to_be32(NFS4_FH_PERSISTENT|
2542 NFS4_FH_VOL_RENAME);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002543 }
2544 if (bmval0 & FATTR4_WORD0_CHANGE) {
J. Bruce Fieldsddd1ea52013-08-27 21:32:25 -04002545 p = xdr_reserve_space(xdr, 8);
2546 if (!p)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002547 goto out_resource;
NeilBrownb8800922017-01-30 17:17:00 +11002548 p = encode_change(p, &stat, d_inode(dentry), exp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002549 }
2550 if (bmval0 & FATTR4_WORD0_SIZE) {
J. Bruce Fieldsddd1ea52013-08-27 21:32:25 -04002551 p = xdr_reserve_space(xdr, 8);
2552 if (!p)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002553 goto out_resource;
J. Bruce Fieldsb64c7f32014-03-22 17:11:35 -04002554 p = xdr_encode_hyper(p, stat.size);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002555 }
2556 if (bmval0 & FATTR4_WORD0_LINK_SUPPORT) {
J. Bruce Fieldsddd1ea52013-08-27 21:32:25 -04002557 p = xdr_reserve_space(xdr, 4);
2558 if (!p)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002559 goto out_resource;
J. Bruce Fieldsc373b0a2014-03-22 17:09:18 -04002560 *p++ = cpu_to_be32(1);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002561 }
2562 if (bmval0 & FATTR4_WORD0_SYMLINK_SUPPORT) {
J. Bruce Fieldsddd1ea52013-08-27 21:32:25 -04002563 p = xdr_reserve_space(xdr, 4);
2564 if (!p)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002565 goto out_resource;
J. Bruce Fieldsc373b0a2014-03-22 17:09:18 -04002566 *p++ = cpu_to_be32(1);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002567 }
2568 if (bmval0 & FATTR4_WORD0_NAMED_ATTR) {
J. Bruce Fieldsddd1ea52013-08-27 21:32:25 -04002569 p = xdr_reserve_space(xdr, 4);
2570 if (!p)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002571 goto out_resource;
J. Bruce Fieldsc373b0a2014-03-22 17:09:18 -04002572 *p++ = cpu_to_be32(0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002573 }
2574 if (bmval0 & FATTR4_WORD0_FSID) {
J. Bruce Fieldsddd1ea52013-08-27 21:32:25 -04002575 p = xdr_reserve_space(xdr, 16);
2576 if (!p)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002577 goto out_resource;
J.Bruce Fields42ca0992006-10-04 02:16:20 -07002578 if (exp->ex_fslocs.migrated) {
J. Bruce Fieldsb64c7f32014-03-22 17:11:35 -04002579 p = xdr_encode_hyper(p, NFS4_REFERRAL_FSID_MAJOR);
2580 p = xdr_encode_hyper(p, NFS4_REFERRAL_FSID_MINOR);
NeilBrownaf6a4e22007-02-14 00:33:12 -08002581 } else switch(fsid_source(fhp)) {
2582 case FSIDSOURCE_FSID:
J. Bruce Fieldsb64c7f32014-03-22 17:11:35 -04002583 p = xdr_encode_hyper(p, (u64)exp->ex_fsid);
2584 p = xdr_encode_hyper(p, (u64)0);
NeilBrownaf6a4e22007-02-14 00:33:12 -08002585 break;
2586 case FSIDSOURCE_DEV:
J. Bruce Fieldsc373b0a2014-03-22 17:09:18 -04002587 *p++ = cpu_to_be32(0);
2588 *p++ = cpu_to_be32(MAJOR(stat.dev));
2589 *p++ = cpu_to_be32(0);
2590 *p++ = cpu_to_be32(MINOR(stat.dev));
NeilBrownaf6a4e22007-02-14 00:33:12 -08002591 break;
2592 case FSIDSOURCE_UUID:
Kinglong Mee94eb3682014-05-23 20:00:19 +08002593 p = xdr_encode_opaque_fixed(p, exp->ex_uuid,
2594 EX_UUID_LEN);
NeilBrownaf6a4e22007-02-14 00:33:12 -08002595 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002596 }
2597 }
2598 if (bmval0 & FATTR4_WORD0_UNIQUE_HANDLES) {
J. Bruce Fieldsddd1ea52013-08-27 21:32:25 -04002599 p = xdr_reserve_space(xdr, 4);
2600 if (!p)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002601 goto out_resource;
J. Bruce Fieldsc373b0a2014-03-22 17:09:18 -04002602 *p++ = cpu_to_be32(0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002603 }
2604 if (bmval0 & FATTR4_WORD0_LEASE_TIME) {
J. Bruce Fieldsddd1ea52013-08-27 21:32:25 -04002605 p = xdr_reserve_space(xdr, 4);
2606 if (!p)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002607 goto out_resource;
J. Bruce Fieldsc373b0a2014-03-22 17:09:18 -04002608 *p++ = cpu_to_be32(nn->nfsd4_lease);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002609 }
2610 if (bmval0 & FATTR4_WORD0_RDATTR_ERROR) {
J. Bruce Fieldsddd1ea52013-08-27 21:32:25 -04002611 p = xdr_reserve_space(xdr, 4);
2612 if (!p)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002613 goto out_resource;
J. Bruce Fieldsc373b0a2014-03-22 17:09:18 -04002614 *p++ = cpu_to_be32(rdattr_err);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002615 }
2616 if (bmval0 & FATTR4_WORD0_ACL) {
2617 struct nfs4_ace *ace;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002618
2619 if (acl == NULL) {
J. Bruce Fieldsddd1ea52013-08-27 21:32:25 -04002620 p = xdr_reserve_space(xdr, 4);
2621 if (!p)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002622 goto out_resource;
2623
J. Bruce Fieldsc373b0a2014-03-22 17:09:18 -04002624 *p++ = cpu_to_be32(0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002625 goto out_acl;
2626 }
J. Bruce Fieldsddd1ea52013-08-27 21:32:25 -04002627 p = xdr_reserve_space(xdr, 4);
2628 if (!p)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002629 goto out_resource;
J. Bruce Fieldsc373b0a2014-03-22 17:09:18 -04002630 *p++ = cpu_to_be32(acl->naces);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002631
J. Bruce Fields28e05dd2007-02-16 01:28:30 -08002632 for (ace = acl->aces; ace < acl->aces + acl->naces; ace++) {
J. Bruce Fieldsddd1ea52013-08-27 21:32:25 -04002633 p = xdr_reserve_space(xdr, 4*3);
2634 if (!p)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002635 goto out_resource;
J. Bruce Fieldsc373b0a2014-03-22 17:09:18 -04002636 *p++ = cpu_to_be32(ace->type);
2637 *p++ = cpu_to_be32(ace->flag);
2638 *p++ = cpu_to_be32(ace->access_mask &
2639 NFS4_ACE_MASK_ALL);
J. Bruce Fieldsddd1ea52013-08-27 21:32:25 -04002640 status = nfsd4_encode_aclname(xdr, rqstp, ace);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002641 if (status)
2642 goto out;
2643 }
2644 }
2645out_acl:
2646 if (bmval0 & FATTR4_WORD0_ACLSUPPORT) {
J. Bruce Fieldsddd1ea52013-08-27 21:32:25 -04002647 p = xdr_reserve_space(xdr, 4);
2648 if (!p)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002649 goto out_resource;
Andreas Gruenbacher0c9d65e2015-04-24 13:04:00 +02002650 *p++ = cpu_to_be32(IS_POSIXACL(dentry->d_inode) ?
Linus Torvalds1da177e2005-04-16 15:20:36 -07002651 ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL : 0);
2652 }
2653 if (bmval0 & FATTR4_WORD0_CANSETTIME) {
J. Bruce Fieldsddd1ea52013-08-27 21:32:25 -04002654 p = xdr_reserve_space(xdr, 4);
2655 if (!p)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002656 goto out_resource;
J. Bruce Fieldsc373b0a2014-03-22 17:09:18 -04002657 *p++ = cpu_to_be32(1);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002658 }
2659 if (bmval0 & FATTR4_WORD0_CASE_INSENSITIVE) {
J. Bruce Fieldsddd1ea52013-08-27 21:32:25 -04002660 p = xdr_reserve_space(xdr, 4);
2661 if (!p)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002662 goto out_resource;
J. Bruce Fieldsc373b0a2014-03-22 17:09:18 -04002663 *p++ = cpu_to_be32(0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002664 }
2665 if (bmval0 & FATTR4_WORD0_CASE_PRESERVING) {
J. Bruce Fieldsddd1ea52013-08-27 21:32:25 -04002666 p = xdr_reserve_space(xdr, 4);
2667 if (!p)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002668 goto out_resource;
J. Bruce Fieldsc373b0a2014-03-22 17:09:18 -04002669 *p++ = cpu_to_be32(1);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002670 }
2671 if (bmval0 & FATTR4_WORD0_CHOWN_RESTRICTED) {
J. Bruce Fieldsddd1ea52013-08-27 21:32:25 -04002672 p = xdr_reserve_space(xdr, 4);
2673 if (!p)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002674 goto out_resource;
J. Bruce Fieldsc373b0a2014-03-22 17:09:18 -04002675 *p++ = cpu_to_be32(1);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002676 }
2677 if (bmval0 & FATTR4_WORD0_FILEHANDLE) {
J. Bruce Fieldsddd1ea52013-08-27 21:32:25 -04002678 p = xdr_reserve_space(xdr, fhp->fh_handle.fh_size + 4);
2679 if (!p)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002680 goto out_resource;
J. Bruce Fields0c0c2672014-03-22 18:43:16 -04002681 p = xdr_encode_opaque(p, &fhp->fh_handle.fh_base,
2682 fhp->fh_handle.fh_size);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002683 }
2684 if (bmval0 & FATTR4_WORD0_FILEID) {
J. Bruce Fieldsddd1ea52013-08-27 21:32:25 -04002685 p = xdr_reserve_space(xdr, 8);
2686 if (!p)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002687 goto out_resource;
J. Bruce Fieldsb64c7f32014-03-22 17:11:35 -04002688 p = xdr_encode_hyper(p, stat.ino);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002689 }
2690 if (bmval0 & FATTR4_WORD0_FILES_AVAIL) {
J. Bruce Fieldsddd1ea52013-08-27 21:32:25 -04002691 p = xdr_reserve_space(xdr, 8);
2692 if (!p)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002693 goto out_resource;
J. Bruce Fieldsb64c7f32014-03-22 17:11:35 -04002694 p = xdr_encode_hyper(p, (u64) statfs.f_ffree);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002695 }
2696 if (bmval0 & FATTR4_WORD0_FILES_FREE) {
J. Bruce Fieldsddd1ea52013-08-27 21:32:25 -04002697 p = xdr_reserve_space(xdr, 8);
2698 if (!p)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002699 goto out_resource;
J. Bruce Fieldsb64c7f32014-03-22 17:11:35 -04002700 p = xdr_encode_hyper(p, (u64) statfs.f_ffree);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002701 }
2702 if (bmval0 & FATTR4_WORD0_FILES_TOTAL) {
J. Bruce Fieldsddd1ea52013-08-27 21:32:25 -04002703 p = xdr_reserve_space(xdr, 8);
2704 if (!p)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002705 goto out_resource;
J. Bruce Fieldsb64c7f32014-03-22 17:11:35 -04002706 p = xdr_encode_hyper(p, (u64) statfs.f_files);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002707 }
J.Bruce Fields81c3f412006-10-04 02:16:19 -07002708 if (bmval0 & FATTR4_WORD0_FS_LOCATIONS) {
J. Bruce Fieldsddd1ea52013-08-27 21:32:25 -04002709 status = nfsd4_encode_fs_locations(xdr, rqstp, exp);
J.Bruce Fields81c3f412006-10-04 02:16:19 -07002710 if (status)
2711 goto out;
2712 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002713 if (bmval0 & FATTR4_WORD0_HOMOGENEOUS) {
J. Bruce Fieldsddd1ea52013-08-27 21:32:25 -04002714 p = xdr_reserve_space(xdr, 4);
2715 if (!p)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002716 goto out_resource;
J. Bruce Fieldsc373b0a2014-03-22 17:09:18 -04002717 *p++ = cpu_to_be32(1);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002718 }
2719 if (bmval0 & FATTR4_WORD0_MAXFILESIZE) {
J. Bruce Fieldsddd1ea52013-08-27 21:32:25 -04002720 p = xdr_reserve_space(xdr, 8);
2721 if (!p)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002722 goto out_resource;
J. Bruce Fieldsb64c7f32014-03-22 17:11:35 -04002723 p = xdr_encode_hyper(p, exp->ex_path.mnt->mnt_sb->s_maxbytes);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002724 }
2725 if (bmval0 & FATTR4_WORD0_MAXLINK) {
J. Bruce Fieldsddd1ea52013-08-27 21:32:25 -04002726 p = xdr_reserve_space(xdr, 4);
2727 if (!p)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002728 goto out_resource;
J. Bruce Fieldsc373b0a2014-03-22 17:09:18 -04002729 *p++ = cpu_to_be32(255);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002730 }
2731 if (bmval0 & FATTR4_WORD0_MAXNAME) {
J. Bruce Fieldsddd1ea52013-08-27 21:32:25 -04002732 p = xdr_reserve_space(xdr, 4);
2733 if (!p)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002734 goto out_resource;
J. Bruce Fieldsc373b0a2014-03-22 17:09:18 -04002735 *p++ = cpu_to_be32(statfs.f_namelen);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002736 }
2737 if (bmval0 & FATTR4_WORD0_MAXREAD) {
J. Bruce Fieldsddd1ea52013-08-27 21:32:25 -04002738 p = xdr_reserve_space(xdr, 8);
2739 if (!p)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002740 goto out_resource;
J. Bruce Fieldsb64c7f32014-03-22 17:11:35 -04002741 p = xdr_encode_hyper(p, (u64) svc_max_payload(rqstp));
Linus Torvalds1da177e2005-04-16 15:20:36 -07002742 }
2743 if (bmval0 & FATTR4_WORD0_MAXWRITE) {
J. Bruce Fieldsddd1ea52013-08-27 21:32:25 -04002744 p = xdr_reserve_space(xdr, 8);
2745 if (!p)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002746 goto out_resource;
J. Bruce Fieldsb64c7f32014-03-22 17:11:35 -04002747 p = xdr_encode_hyper(p, (u64) svc_max_payload(rqstp));
Linus Torvalds1da177e2005-04-16 15:20:36 -07002748 }
2749 if (bmval1 & FATTR4_WORD1_MODE) {
J. Bruce Fieldsddd1ea52013-08-27 21:32:25 -04002750 p = xdr_reserve_space(xdr, 4);
2751 if (!p)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002752 goto out_resource;
J. Bruce Fieldsc373b0a2014-03-22 17:09:18 -04002753 *p++ = cpu_to_be32(stat.mode & S_IALLUGO);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002754 }
2755 if (bmval1 & FATTR4_WORD1_NO_TRUNC) {
J. Bruce Fieldsddd1ea52013-08-27 21:32:25 -04002756 p = xdr_reserve_space(xdr, 4);
2757 if (!p)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002758 goto out_resource;
J. Bruce Fieldsc373b0a2014-03-22 17:09:18 -04002759 *p++ = cpu_to_be32(1);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002760 }
2761 if (bmval1 & FATTR4_WORD1_NUMLINKS) {
J. Bruce Fieldsddd1ea52013-08-27 21:32:25 -04002762 p = xdr_reserve_space(xdr, 4);
2763 if (!p)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002764 goto out_resource;
J. Bruce Fieldsc373b0a2014-03-22 17:09:18 -04002765 *p++ = cpu_to_be32(stat.nlink);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002766 }
2767 if (bmval1 & FATTR4_WORD1_OWNER) {
J. Bruce Fieldsddd1ea52013-08-27 21:32:25 -04002768 status = nfsd4_encode_user(xdr, rqstp, stat.uid);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002769 if (status)
2770 goto out;
2771 }
2772 if (bmval1 & FATTR4_WORD1_OWNER_GROUP) {
J. Bruce Fieldsddd1ea52013-08-27 21:32:25 -04002773 status = nfsd4_encode_group(xdr, rqstp, stat.gid);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002774 if (status)
2775 goto out;
2776 }
2777 if (bmval1 & FATTR4_WORD1_RAWDEV) {
J. Bruce Fieldsddd1ea52013-08-27 21:32:25 -04002778 p = xdr_reserve_space(xdr, 8);
2779 if (!p)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002780 goto out_resource;
J. Bruce Fieldsc373b0a2014-03-22 17:09:18 -04002781 *p++ = cpu_to_be32((u32) MAJOR(stat.rdev));
2782 *p++ = cpu_to_be32((u32) MINOR(stat.rdev));
Linus Torvalds1da177e2005-04-16 15:20:36 -07002783 }
2784 if (bmval1 & FATTR4_WORD1_SPACE_AVAIL) {
J. Bruce Fieldsddd1ea52013-08-27 21:32:25 -04002785 p = xdr_reserve_space(xdr, 8);
2786 if (!p)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002787 goto out_resource;
2788 dummy64 = (u64)statfs.f_bavail * (u64)statfs.f_bsize;
J. Bruce Fieldsb64c7f32014-03-22 17:11:35 -04002789 p = xdr_encode_hyper(p, dummy64);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002790 }
2791 if (bmval1 & FATTR4_WORD1_SPACE_FREE) {
J. Bruce Fieldsddd1ea52013-08-27 21:32:25 -04002792 p = xdr_reserve_space(xdr, 8);
2793 if (!p)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002794 goto out_resource;
2795 dummy64 = (u64)statfs.f_bfree * (u64)statfs.f_bsize;
J. Bruce Fieldsb64c7f32014-03-22 17:11:35 -04002796 p = xdr_encode_hyper(p, dummy64);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002797 }
2798 if (bmval1 & FATTR4_WORD1_SPACE_TOTAL) {
J. Bruce Fieldsddd1ea52013-08-27 21:32:25 -04002799 p = xdr_reserve_space(xdr, 8);
2800 if (!p)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002801 goto out_resource;
2802 dummy64 = (u64)statfs.f_blocks * (u64)statfs.f_bsize;
J. Bruce Fieldsb64c7f32014-03-22 17:11:35 -04002803 p = xdr_encode_hyper(p, dummy64);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002804 }
2805 if (bmval1 & FATTR4_WORD1_SPACE_USED) {
J. Bruce Fieldsddd1ea52013-08-27 21:32:25 -04002806 p = xdr_reserve_space(xdr, 8);
2807 if (!p)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002808 goto out_resource;
2809 dummy64 = (u64)stat.blocks << 9;
J. Bruce Fieldsb64c7f32014-03-22 17:11:35 -04002810 p = xdr_encode_hyper(p, dummy64);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002811 }
2812 if (bmval1 & FATTR4_WORD1_TIME_ACCESS) {
J. Bruce Fieldsddd1ea52013-08-27 21:32:25 -04002813 p = xdr_reserve_space(xdr, 12);
2814 if (!p)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002815 goto out_resource;
J. Bruce Fieldsb64c7f32014-03-22 17:11:35 -04002816 p = xdr_encode_hyper(p, (s64)stat.atime.tv_sec);
J. Bruce Fieldsc373b0a2014-03-22 17:09:18 -04002817 *p++ = cpu_to_be32(stat.atime.tv_nsec);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002818 }
2819 if (bmval1 & FATTR4_WORD1_TIME_DELTA) {
J. Bruce Fieldsddd1ea52013-08-27 21:32:25 -04002820 p = xdr_reserve_space(xdr, 12);
2821 if (!p)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002822 goto out_resource;
J. Bruce Fields16945142018-04-25 14:34:11 -04002823 p = encode_time_delta(p, d_inode(dentry));
Linus Torvalds1da177e2005-04-16 15:20:36 -07002824 }
2825 if (bmval1 & FATTR4_WORD1_TIME_METADATA) {
J. Bruce Fieldsddd1ea52013-08-27 21:32:25 -04002826 p = xdr_reserve_space(xdr, 12);
2827 if (!p)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002828 goto out_resource;
J. Bruce Fieldsb64c7f32014-03-22 17:11:35 -04002829 p = xdr_encode_hyper(p, (s64)stat.ctime.tv_sec);
J. Bruce Fieldsc373b0a2014-03-22 17:09:18 -04002830 *p++ = cpu_to_be32(stat.ctime.tv_nsec);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002831 }
2832 if (bmval1 & FATTR4_WORD1_TIME_MODIFY) {
J. Bruce Fieldsddd1ea52013-08-27 21:32:25 -04002833 p = xdr_reserve_space(xdr, 12);
2834 if (!p)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002835 goto out_resource;
J. Bruce Fieldsb64c7f32014-03-22 17:11:35 -04002836 p = xdr_encode_hyper(p, (s64)stat.mtime.tv_sec);
J. Bruce Fieldsc373b0a2014-03-22 17:09:18 -04002837 *p++ = cpu_to_be32(stat.mtime.tv_nsec);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002838 }
2839 if (bmval1 & FATTR4_WORD1_MOUNTED_ON_FILEID) {
Kinglong Mee0a2050d2015-07-30 21:51:54 +08002840 struct kstat parent_stat;
2841 u64 ino = stat.ino;
2842
J. Bruce Fieldsddd1ea52013-08-27 21:32:25 -04002843 p = xdr_reserve_space(xdr, 8);
2844 if (!p)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002845 goto out_resource;
Frank Filz406a7ea2007-11-27 11:34:05 -08002846 /*
2847 * Get parent's attributes if not ignoring crossmount
2848 * and this is the root of a cross-mounted filesystem.
2849 */
2850 if (ignore_crossmnt == 0 &&
Kinglong Mee0a2050d2015-07-30 21:51:54 +08002851 dentry == exp->ex_path.mnt->mnt_root) {
2852 err = get_parent_attributes(exp, &parent_stat);
2853 if (err)
2854 goto out_nfserr;
2855 ino = parent_stat.ino;
2856 }
2857 p = xdr_encode_hyper(p, ino);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002858 }
Christoph Hellwig9cf514c2014-05-05 13:11:59 +02002859#ifdef CONFIG_NFSD_PNFS
Kinglong Mee6896f152015-07-30 21:52:44 +08002860 if (bmval1 & FATTR4_WORD1_FS_LAYOUT_TYPES) {
Jeff Layton8a4c3922016-07-10 15:55:58 -04002861 status = nfsd4_encode_layout_types(xdr, exp->ex_layout_types);
Kinglong Mee6896f152015-07-30 21:52:44 +08002862 if (status)
2863 goto out;
2864 }
2865
2866 if (bmval2 & FATTR4_WORD2_LAYOUT_TYPES) {
Jeff Layton8a4c3922016-07-10 15:55:58 -04002867 status = nfsd4_encode_layout_types(xdr, exp->ex_layout_types);
Kinglong Mee6896f152015-07-30 21:52:44 +08002868 if (status)
2869 goto out;
Christoph Hellwig9cf514c2014-05-05 13:11:59 +02002870 }
2871
2872 if (bmval2 & FATTR4_WORD2_LAYOUT_BLKSIZE) {
2873 p = xdr_reserve_space(xdr, 4);
2874 if (!p)
2875 goto out_resource;
2876 *p++ = cpu_to_be32(stat.blksize);
2877 }
2878#endif /* CONFIG_NFSD_PNFS */
Benny Halevy8c18f202009-04-03 08:29:14 +03002879 if (bmval2 & FATTR4_WORD2_SUPPATTR_EXCLCREAT) {
Trond Myklebustb26b78c2017-05-09 16:24:59 -04002880 u32 supp[3];
2881
2882 memcpy(supp, nfsd_suppattrs[minorversion], sizeof(supp));
2883 supp[0] &= NFSD_SUPPATTR_EXCLCREAT_WORD0;
2884 supp[1] &= NFSD_SUPPATTR_EXCLCREAT_WORD1;
2885 supp[2] &= NFSD_SUPPATTR_EXCLCREAT_WORD2;
2886
2887 status = nfsd4_encode_bitmap(xdr, supp[0], supp[1], supp[2]);
Kinglong Mee75976de2015-07-30 21:55:30 +08002888 if (status)
2889 goto out;
Benny Halevy8c18f202009-04-03 08:29:14 +03002890 }
Andy Adamson7e705702009-04-03 08:29:11 +03002891
J. Bruce Fieldsa8585762018-04-25 13:26:23 -04002892 if (bmval2 & FATTR4_WORD2_CHANGE_ATTR_TYPE) {
2893 p = xdr_reserve_space(xdr, 4);
2894 if (!p)
2895 goto out_resource;
2896 if (IS_I_VERSION(d_inode(dentry)))
2897 *p++ = cpu_to_be32(NFS4_CHANGE_TYPE_IS_MONOTONIC_INCR);
2898 else
2899 *p++ = cpu_to_be32(NFS4_CHANGE_TYPE_IS_TIME_METADATA);
2900 }
2901
Kinglong Mee7d580722015-07-30 21:54:26 +08002902 if (bmval2 & FATTR4_WORD2_SECURITY_LABEL) {
2903 status = nfsd4_encode_security_label(xdr, rqstp, context,
2904 contextlen);
2905 if (status)
2906 goto out;
2907 }
2908
J. Bruce Fields082d4bd2013-08-29 15:42:52 -04002909 attrlen = htonl(xdr->buf->len - attrlen_offset - 4);
2910 write_bytes_to_xdr_buf(xdr->buf, attrlen_offset, &attrlen, 4);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002911 status = nfs_ok;
2912
2913out:
J. Bruce Fieldsba4e55b2013-05-15 10:27:52 -04002914#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
David Quigley18032ca2013-05-02 13:19:10 -04002915 if (context)
2916 security_release_secctx(context, contextlen);
J. Bruce Fieldsba4e55b2013-05-15 10:27:52 -04002917#endif /* CONFIG_NFSD_V4_SECURITY_LABEL */
J. Bruce Fields28e05dd2007-02-16 01:28:30 -08002918 kfree(acl);
Yan, Zheng18df11d02014-03-10 12:52:07 +08002919 if (tempfh) {
J. Bruce Fieldsd50e61362014-01-15 12:21:12 -05002920 fh_put(tempfh);
Yan, Zheng18df11d02014-03-10 12:52:07 +08002921 kfree(tempfh);
2922 }
J. Bruce Fields1fcea5b2014-02-26 20:17:02 -05002923 if (status)
2924 xdr_truncate_encode(xdr, starting_len);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002925 return status;
2926out_nfserr:
Al Virob8dd7b92006-10-19 23:29:01 -07002927 status = nfserrno(err);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002928 goto out;
2929out_resource:
Linus Torvalds1da177e2005-04-16 15:20:36 -07002930 status = nfserr_resource;
2931 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002932}
2933
J. Bruce Fields2825a7f2013-08-26 16:04:46 -04002934static void svcxdr_init_encode_from_buffer(struct xdr_stream *xdr,
2935 struct xdr_buf *buf, __be32 *p, int bytes)
2936{
2937 xdr->scratch.iov_len = 0;
2938 memset(buf, 0, sizeof(struct xdr_buf));
2939 buf->head[0].iov_base = p;
2940 buf->head[0].iov_len = 0;
2941 buf->len = 0;
2942 xdr->buf = buf;
2943 xdr->iov = buf->head;
2944 xdr->p = p;
2945 xdr->end = (void *)p + bytes;
2946 buf->buflen = bytes;
2947}
2948
J. Bruce Fieldsd5184652013-08-26 16:04:46 -04002949__be32 nfsd4_encode_fattr_to_buf(__be32 **p, int words,
2950 struct svc_fh *fhp, struct svc_export *exp,
2951 struct dentry *dentry, u32 *bmval,
2952 struct svc_rqst *rqstp, int ignore_crossmnt)
2953{
J. Bruce Fields2825a7f2013-08-26 16:04:46 -04002954 struct xdr_buf dummy;
J. Bruce Fieldsd5184652013-08-26 16:04:46 -04002955 struct xdr_stream xdr;
2956 __be32 ret;
2957
J. Bruce Fields2825a7f2013-08-26 16:04:46 -04002958 svcxdr_init_encode_from_buffer(&xdr, &dummy, *p, words << 2);
J. Bruce Fieldsd5184652013-08-26 16:04:46 -04002959 ret = nfsd4_encode_fattr(&xdr, fhp, exp, dentry, bmval, rqstp,
2960 ignore_crossmnt);
2961 *p = xdr.p;
2962 return ret;
2963}
2964
J. Bruce Fieldsc0ce6ec2008-02-11 15:48:47 -05002965static inline int attributes_need_mount(u32 *bmval)
2966{
2967 if (bmval[0] & ~(FATTR4_WORD0_RDATTR_ERROR | FATTR4_WORD0_LEASE_TIME))
2968 return 1;
2969 if (bmval[1] & ~FATTR4_WORD1_MOUNTED_ON_FILEID)
2970 return 1;
2971 return 0;
2972}
2973
Al Virob37ad282006-10-19 23:28:59 -07002974static __be32
J. Bruce Fields561f0ed2014-01-20 16:37:11 -05002975nfsd4_encode_dirent_fattr(struct xdr_stream *xdr, struct nfsd4_readdir *cd,
2976 const char *name, int namlen)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002977{
2978 struct svc_export *exp = cd->rd_fhp->fh_export;
2979 struct dentry *dentry;
Al Virob37ad282006-10-19 23:28:59 -07002980 __be32 nfserr;
Frank Filz406a7ea2007-11-27 11:34:05 -08002981 int ignore_crossmnt = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002982
NeilBrownbbddca82016-01-07 16:08:20 -05002983 dentry = lookup_one_len_unlocked(name, cd->rd_fhp->fh_dentry, namlen);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002984 if (IS_ERR(dentry))
2985 return nfserrno(PTR_ERR(dentry));
David Howells2b0143b2015-03-17 22:25:59 +00002986 if (d_really_is_negative(dentry)) {
J. Bruce Fieldsb2c0cea2009-05-05 19:04:29 -04002987 /*
NeilBrownbbddca82016-01-07 16:08:20 -05002988 * we're not holding the i_mutex here, so there's
2989 * a window where this directory entry could have gone
2990 * away.
J. Bruce Fieldsb2c0cea2009-05-05 19:04:29 -04002991 */
2992 dput(dentry);
2993 return nfserr_noent;
2994 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002995
2996 exp_get(exp);
Frank Filz406a7ea2007-11-27 11:34:05 -08002997 /*
2998 * In the case of a mountpoint, the client may be asking for
2999 * attributes that are only properties of the underlying filesystem
3000 * as opposed to the cross-mounted file system. In such a case,
3001 * we will not follow the cross mount and will fill the attribtutes
3002 * directly from the mountpoint dentry.
3003 */
J. Bruce Fields3227fa42009-10-25 21:43:01 -04003004 if (nfsd_mountpoint(dentry, exp)) {
J.Bruce Fields021d3a72006-12-13 00:35:24 -08003005 int err;
3006
J. Bruce Fields3227fa42009-10-25 21:43:01 -04003007 if (!(exp->ex_flags & NFSEXP_V4ROOT)
3008 && !attributes_need_mount(cd->rd_bmval)) {
3009 ignore_crossmnt = 1;
3010 goto out_encode;
3011 }
Andy Adamsondcb488a32007-07-17 04:04:51 -07003012 /*
3013 * Why the heck aren't we just using nfsd_lookup??
3014 * Different "."/".." handling? Something else?
3015 * At least, add a comment here to explain....
3016 */
J.Bruce Fields021d3a72006-12-13 00:35:24 -08003017 err = nfsd_cross_mnt(cd->rd_rqstp, &dentry, &exp);
3018 if (err) {
3019 nfserr = nfserrno(err);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003020 goto out_put;
3021 }
Andy Adamsondcb488a32007-07-17 04:04:51 -07003022 nfserr = check_nfsd_access(exp, cd->rd_rqstp);
3023 if (nfserr)
3024 goto out_put;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003025
3026 }
J. Bruce Fields3227fa42009-10-25 21:43:01 -04003027out_encode:
J. Bruce Fields561f0ed2014-01-20 16:37:11 -05003028 nfserr = nfsd4_encode_fattr(xdr, NULL, exp, dentry, cd->rd_bmval,
Frank Filz406a7ea2007-11-27 11:34:05 -08003029 cd->rd_rqstp, ignore_crossmnt);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003030out_put:
3031 dput(dentry);
3032 exp_put(exp);
3033 return nfserr;
3034}
3035
Al Viro2ebbc012006-10-19 23:28:58 -07003036static __be32 *
J. Bruce Fields561f0ed2014-01-20 16:37:11 -05003037nfsd4_encode_rdattr_error(struct xdr_stream *xdr, __be32 nfserr)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003038{
J. Bruce Fields561f0ed2014-01-20 16:37:11 -05003039 __be32 *p;
3040
Kinglong Meec3a45612014-07-06 11:34:43 +08003041 p = xdr_reserve_space(xdr, 20);
J. Bruce Fields561f0ed2014-01-20 16:37:11 -05003042 if (!p)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003043 return NULL;
3044 *p++ = htonl(2);
3045 *p++ = htonl(FATTR4_WORD0_RDATTR_ERROR); /* bmval0 */
3046 *p++ = htonl(0); /* bmval1 */
3047
J. Bruce Fields87915c62013-01-16 17:33:28 -05003048 *p++ = htonl(4); /* attribute length */
Linus Torvalds1da177e2005-04-16 15:20:36 -07003049 *p++ = nfserr; /* no htonl */
Linus Torvalds1da177e2005-04-16 15:20:36 -07003050 return p;
3051}
3052
3053static int
NeilBrowna0ad13e2007-01-26 00:57:10 -08003054nfsd4_encode_dirent(void *ccdv, const char *name, int namlen,
3055 loff_t offset, u64 ino, unsigned int d_type)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003056{
NeilBrowna0ad13e2007-01-26 00:57:10 -08003057 struct readdir_cd *ccd = ccdv;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003058 struct nfsd4_readdir *cd = container_of(ccd, struct nfsd4_readdir, common);
J. Bruce Fields561f0ed2014-01-20 16:37:11 -05003059 struct xdr_stream *xdr = cd->xdr;
3060 int start_offset = xdr->buf->len;
3061 int cookie_offset;
J. Bruce Fieldsaee37762014-08-20 14:49:50 -04003062 u32 name_and_cookie;
J. Bruce Fields561f0ed2014-01-20 16:37:11 -05003063 int entry_bytes;
Al Virob37ad282006-10-19 23:28:59 -07003064 __be32 nfserr = nfserr_toosmall;
J. Bruce Fields561f0ed2014-01-20 16:37:11 -05003065 __be64 wire_offset;
3066 __be32 *p;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003067
3068 /* In nfsv4, "." and ".." never make it onto the wire.. */
3069 if (name && isdotent(name, namlen)) {
3070 cd->common.err = nfs_ok;
3071 return 0;
3072 }
3073
J. Bruce Fields561f0ed2014-01-20 16:37:11 -05003074 if (cd->cookie_offset) {
3075 wire_offset = cpu_to_be64(offset);
3076 write_bytes_to_xdr_buf(xdr->buf, cd->cookie_offset,
3077 &wire_offset, 8);
3078 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07003079
J. Bruce Fields561f0ed2014-01-20 16:37:11 -05003080 p = xdr_reserve_space(xdr, 4);
3081 if (!p)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003082 goto fail;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003083 *p++ = xdr_one; /* mark entry present */
J. Bruce Fields561f0ed2014-01-20 16:37:11 -05003084 cookie_offset = xdr->buf->len;
3085 p = xdr_reserve_space(xdr, 3*4 + namlen);
3086 if (!p)
3087 goto fail;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003088 p = xdr_encode_hyper(p, NFS_OFFSET_MAX); /* offset of next entry */
3089 p = xdr_encode_array(p, name, namlen); /* name length & name */
3090
J. Bruce Fields561f0ed2014-01-20 16:37:11 -05003091 nfserr = nfsd4_encode_dirent_fattr(xdr, cd, name, namlen);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003092 switch (nfserr) {
3093 case nfs_ok:
Linus Torvalds1da177e2005-04-16 15:20:36 -07003094 break;
3095 case nfserr_resource:
3096 nfserr = nfserr_toosmall;
3097 goto fail;
J. Bruce Fieldsb2c0cea2009-05-05 19:04:29 -04003098 case nfserr_noent:
Kinglong Meef41c5ad2014-06-13 17:32:42 +08003099 xdr_truncate_encode(xdr, start_offset);
J. Bruce Fieldsb2c0cea2009-05-05 19:04:29 -04003100 goto skip_entry;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003101 default:
3102 /*
3103 * If the client requested the RDATTR_ERROR attribute,
3104 * we stuff the error code into this attribute
3105 * and continue. If this attribute was not requested,
3106 * then in accordance with the spec, we fail the
3107 * entire READDIR operation(!)
3108 */
3109 if (!(cd->rd_bmval[0] & FATTR4_WORD0_RDATTR_ERROR))
3110 goto fail;
J. Bruce Fields561f0ed2014-01-20 16:37:11 -05003111 p = nfsd4_encode_rdattr_error(xdr, nfserr);
Fred Isaman34081ef2006-01-18 17:43:40 -08003112 if (p == NULL) {
3113 nfserr = nfserr_toosmall;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003114 goto fail;
Fred Isaman34081ef2006-01-18 17:43:40 -08003115 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07003116 }
J. Bruce Fields561f0ed2014-01-20 16:37:11 -05003117 nfserr = nfserr_toosmall;
3118 entry_bytes = xdr->buf->len - start_offset;
3119 if (entry_bytes > cd->rd_maxcount)
3120 goto fail;
3121 cd->rd_maxcount -= entry_bytes;
J. Bruce Fieldsaee37762014-08-20 14:49:50 -04003122 /*
3123 * RFC 3530 14.2.24 describes rd_dircount as only a "hint", so
3124 * let's always let through the first entry, at least:
3125 */
J. Bruce Fields0ec016e2014-12-19 18:01:35 -05003126 if (!cd->rd_dircount)
3127 goto fail;
3128 name_and_cookie = 4 + 4 * XDR_QUADLEN(namlen) + 8;
J. Bruce Fieldsaee37762014-08-20 14:49:50 -04003129 if (name_and_cookie > cd->rd_dircount && cd->cookie_offset)
3130 goto fail;
3131 cd->rd_dircount -= min(cd->rd_dircount, name_and_cookie);
J. Bruce Fields0ec016e2014-12-19 18:01:35 -05003132
J. Bruce Fields561f0ed2014-01-20 16:37:11 -05003133 cd->cookie_offset = cookie_offset;
J. Bruce Fieldsb2c0cea2009-05-05 19:04:29 -04003134skip_entry:
Linus Torvalds1da177e2005-04-16 15:20:36 -07003135 cd->common.err = nfs_ok;
3136 return 0;
3137fail:
J. Bruce Fields561f0ed2014-01-20 16:37:11 -05003138 xdr_truncate_encode(xdr, start_offset);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003139 cd->common.err = nfserr;
3140 return -EINVAL;
3141}
3142
J. Bruce Fieldsd0a381d2014-01-30 17:18:38 -05003143static __be32
3144nfsd4_encode_stateid(struct xdr_stream *xdr, stateid_t *sid)
Benny Halevye2f282b2008-08-12 20:45:07 +03003145{
J. Bruce Fieldsbc749ca2009-04-07 16:55:27 -07003146 __be32 *p;
Benny Halevye2f282b2008-08-12 20:45:07 +03003147
J. Bruce Fieldsd0a381d2014-01-30 17:18:38 -05003148 p = xdr_reserve_space(xdr, sizeof(stateid_t));
3149 if (!p)
3150 return nfserr_resource;
J. Bruce Fieldsc373b0a2014-03-22 17:09:18 -04003151 *p++ = cpu_to_be32(sid->si_generation);
J. Bruce Fields0c0c2672014-03-22 18:43:16 -04003152 p = xdr_encode_opaque_fixed(p, &sid->si_opaque,
3153 sizeof(stateid_opaque_t));
J. Bruce Fieldsd0a381d2014-01-30 17:18:38 -05003154 return 0;
Benny Halevye2f282b2008-08-12 20:45:07 +03003155}
3156
Benny Halevy695e12f2008-07-04 14:38:33 +03003157static __be32
Al Virob37ad282006-10-19 23:28:59 -07003158nfsd4_encode_access(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_access *access)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003159{
J. Bruce Fieldsd0a381d2014-01-30 17:18:38 -05003160 struct xdr_stream *xdr = &resp->xdr;
J. Bruce Fieldsbc749ca2009-04-07 16:55:27 -07003161 __be32 *p;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003162
J. Bruce Fieldsbac966d2017-05-06 11:12:04 -04003163 p = xdr_reserve_space(xdr, 8);
3164 if (!p)
3165 return nfserr_resource;
3166 *p++ = cpu_to_be32(access->ac_supported);
3167 *p++ = cpu_to_be32(access->ac_resp_access);
3168 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003169}
3170
J. Bruce Fields1d1bc8f2010-10-04 23:12:59 -04003171static __be32 nfsd4_encode_bind_conn_to_session(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_bind_conn_to_session *bcts)
3172{
J. Bruce Fieldsd0a381d2014-01-30 17:18:38 -05003173 struct xdr_stream *xdr = &resp->xdr;
J. Bruce Fields1d1bc8f2010-10-04 23:12:59 -04003174 __be32 *p;
3175
J. Bruce Fieldsbac966d2017-05-06 11:12:04 -04003176 p = xdr_reserve_space(xdr, NFS4_MAX_SESSIONID_LEN + 8);
3177 if (!p)
3178 return nfserr_resource;
3179 p = xdr_encode_opaque_fixed(p, bcts->sessionid.data,
3180 NFS4_MAX_SESSIONID_LEN);
3181 *p++ = cpu_to_be32(bcts->dir);
3182 /* Upshifting from TCP to RDMA is not supported */
3183 *p++ = cpu_to_be32(0);
3184 return 0;
J. Bruce Fields1d1bc8f2010-10-04 23:12:59 -04003185}
3186
Benny Halevy695e12f2008-07-04 14:38:33 +03003187static __be32
Al Virob37ad282006-10-19 23:28:59 -07003188nfsd4_encode_close(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_close *close)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003189{
J. Bruce Fieldsd0a381d2014-01-30 17:18:38 -05003190 struct xdr_stream *xdr = &resp->xdr;
3191
J. Bruce Fieldsbac966d2017-05-06 11:12:04 -04003192 return nfsd4_encode_stateid(xdr, &close->cl_stateid);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003193}
3194
3195
Benny Halevy695e12f2008-07-04 14:38:33 +03003196static __be32
Al Virob37ad282006-10-19 23:28:59 -07003197nfsd4_encode_commit(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_commit *commit)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003198{
J. Bruce Fieldsd0a381d2014-01-30 17:18:38 -05003199 struct xdr_stream *xdr = &resp->xdr;
J. Bruce Fieldsbc749ca2009-04-07 16:55:27 -07003200 __be32 *p;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003201
J. Bruce Fieldsbac966d2017-05-06 11:12:04 -04003202 p = xdr_reserve_space(xdr, NFS4_VERIFIER_SIZE);
3203 if (!p)
3204 return nfserr_resource;
3205 p = xdr_encode_opaque_fixed(p, commit->co_verf.data,
J. Bruce Fields0c0c2672014-03-22 18:43:16 -04003206 NFS4_VERIFIER_SIZE);
J. Bruce Fieldsbac966d2017-05-06 11:12:04 -04003207 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003208}
3209
Benny Halevy695e12f2008-07-04 14:38:33 +03003210static __be32
Al Virob37ad282006-10-19 23:28:59 -07003211nfsd4_encode_create(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_create *create)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003212{
J. Bruce Fieldsd0a381d2014-01-30 17:18:38 -05003213 struct xdr_stream *xdr = &resp->xdr;
J. Bruce Fieldsbc749ca2009-04-07 16:55:27 -07003214 __be32 *p;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003215
J. Bruce Fieldsbac966d2017-05-06 11:12:04 -04003216 p = xdr_reserve_space(xdr, 20);
3217 if (!p)
3218 return nfserr_resource;
3219 encode_cinfo(p, &create->cr_cinfo);
3220 nfserr = nfsd4_encode_bitmap(xdr, create->cr_bmval[0],
3221 create->cr_bmval[1], create->cr_bmval[2]);
3222 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003223}
3224
Al Virob37ad282006-10-19 23:28:59 -07003225static __be32
3226nfsd4_encode_getattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_getattr *getattr)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003227{
3228 struct svc_fh *fhp = getattr->ga_fhp;
J. Bruce Fieldsd5184652013-08-26 16:04:46 -04003229 struct xdr_stream *xdr = &resp->xdr;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003230
J. Bruce Fieldsbac966d2017-05-06 11:12:04 -04003231 return nfsd4_encode_fattr(xdr, fhp, fhp->fh_export, fhp->fh_dentry,
3232 getattr->ga_bmval, resp->rqstp, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003233}
3234
Benny Halevy695e12f2008-07-04 14:38:33 +03003235static __be32
3236nfsd4_encode_getfh(struct nfsd4_compoundres *resp, __be32 nfserr, struct svc_fh **fhpp)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003237{
J. Bruce Fieldsd0a381d2014-01-30 17:18:38 -05003238 struct xdr_stream *xdr = &resp->xdr;
Benny Halevy695e12f2008-07-04 14:38:33 +03003239 struct svc_fh *fhp = *fhpp;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003240 unsigned int len;
J. Bruce Fieldsbc749ca2009-04-07 16:55:27 -07003241 __be32 *p;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003242
J. Bruce Fieldsbac966d2017-05-06 11:12:04 -04003243 len = fhp->fh_handle.fh_size;
3244 p = xdr_reserve_space(xdr, len + 4);
3245 if (!p)
3246 return nfserr_resource;
3247 p = xdr_encode_opaque(p, &fhp->fh_handle.fh_base, len);
3248 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003249}
3250
3251/*
3252* Including all fields other than the name, a LOCK4denied structure requires
3253* 8(clientid) + 4(namelen) + 8(offset) + 8(length) + 4(type) = 32 bytes.
3254*/
J. Bruce Fieldsd0a381d2014-01-30 17:18:38 -05003255static __be32
3256nfsd4_encode_lock_denied(struct xdr_stream *xdr, struct nfsd4_lock_denied *ld)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003257{
J. Bruce Fields7c13f342011-08-30 22:15:47 -04003258 struct xdr_netobj *conf = &ld->ld_owner;
J. Bruce Fieldsbc749ca2009-04-07 16:55:27 -07003259 __be32 *p;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003260
J. Bruce Fields8c7424c2014-03-10 12:19:10 -04003261again:
J. Bruce Fieldsd0a381d2014-01-30 17:18:38 -05003262 p = xdr_reserve_space(xdr, 32 + XDR_LEN(conf->len));
J. Bruce Fields8c7424c2014-03-10 12:19:10 -04003263 if (!p) {
3264 /*
3265 * Don't fail to return the result just because we can't
3266 * return the conflicting open:
3267 */
3268 if (conf->len) {
Kinglong Meef98bac52014-07-07 22:10:56 +08003269 kfree(conf->data);
J. Bruce Fields8c7424c2014-03-10 12:19:10 -04003270 conf->len = 0;
3271 conf->data = NULL;
3272 goto again;
3273 }
J. Bruce Fieldsd0a381d2014-01-30 17:18:38 -05003274 return nfserr_resource;
J. Bruce Fields8c7424c2014-03-10 12:19:10 -04003275 }
J. Bruce Fieldsb64c7f32014-03-22 17:11:35 -04003276 p = xdr_encode_hyper(p, ld->ld_start);
3277 p = xdr_encode_hyper(p, ld->ld_length);
J. Bruce Fieldsc373b0a2014-03-22 17:09:18 -04003278 *p++ = cpu_to_be32(ld->ld_type);
J. Bruce Fields7c13f342011-08-30 22:15:47 -04003279 if (conf->len) {
J. Bruce Fields0c0c2672014-03-22 18:43:16 -04003280 p = xdr_encode_opaque_fixed(p, &ld->ld_clientid, 8);
3281 p = xdr_encode_opaque(p, conf->data, conf->len);
Kinglong Meef98bac52014-07-07 22:10:56 +08003282 kfree(conf->data);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003283 } else { /* non - nfsv4 lock in conflict, no clientid nor owner */
J. Bruce Fieldsb64c7f32014-03-22 17:11:35 -04003284 p = xdr_encode_hyper(p, (u64)0); /* clientid */
J. Bruce Fieldsc373b0a2014-03-22 17:09:18 -04003285 *p++ = cpu_to_be32(0); /* length of owner name */
Linus Torvalds1da177e2005-04-16 15:20:36 -07003286 }
J. Bruce Fieldsd0a381d2014-01-30 17:18:38 -05003287 return nfserr_denied;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003288}
3289
Benny Halevy695e12f2008-07-04 14:38:33 +03003290static __be32
Al Virob37ad282006-10-19 23:28:59 -07003291nfsd4_encode_lock(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lock *lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003292{
J. Bruce Fieldsd0a381d2014-01-30 17:18:38 -05003293 struct xdr_stream *xdr = &resp->xdr;
3294
Benny Halevye2f282b2008-08-12 20:45:07 +03003295 if (!nfserr)
J. Bruce Fieldsd0a381d2014-01-30 17:18:38 -05003296 nfserr = nfsd4_encode_stateid(xdr, &lock->lk_resp_stateid);
Benny Halevye2f282b2008-08-12 20:45:07 +03003297 else if (nfserr == nfserr_denied)
J. Bruce Fieldsd0a381d2014-01-30 17:18:38 -05003298 nfserr = nfsd4_encode_lock_denied(xdr, &lock->lk_denied);
Kinglong Meef98bac52014-07-07 22:10:56 +08003299
Benny Halevy695e12f2008-07-04 14:38:33 +03003300 return nfserr;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003301}
3302
Benny Halevy695e12f2008-07-04 14:38:33 +03003303static __be32
Al Virob37ad282006-10-19 23:28:59 -07003304nfsd4_encode_lockt(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lockt *lockt)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003305{
J. Bruce Fieldsd0a381d2014-01-30 17:18:38 -05003306 struct xdr_stream *xdr = &resp->xdr;
3307
Linus Torvalds1da177e2005-04-16 15:20:36 -07003308 if (nfserr == nfserr_denied)
J. Bruce Fieldsd0a381d2014-01-30 17:18:38 -05003309 nfsd4_encode_lock_denied(xdr, &lockt->lt_denied);
Benny Halevy695e12f2008-07-04 14:38:33 +03003310 return nfserr;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003311}
3312
Benny Halevy695e12f2008-07-04 14:38:33 +03003313static __be32
Al Virob37ad282006-10-19 23:28:59 -07003314nfsd4_encode_locku(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_locku *locku)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003315{
J. Bruce Fieldsd0a381d2014-01-30 17:18:38 -05003316 struct xdr_stream *xdr = &resp->xdr;
3317
J. Bruce Fieldsbac966d2017-05-06 11:12:04 -04003318 return nfsd4_encode_stateid(xdr, &locku->lu_stateid);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003319}
3320
3321
Benny Halevy695e12f2008-07-04 14:38:33 +03003322static __be32
Al Virob37ad282006-10-19 23:28:59 -07003323nfsd4_encode_link(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_link *link)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003324{
J. Bruce Fieldsd0a381d2014-01-30 17:18:38 -05003325 struct xdr_stream *xdr = &resp->xdr;
J. Bruce Fieldsbc749ca2009-04-07 16:55:27 -07003326 __be32 *p;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003327
J. Bruce Fieldsbac966d2017-05-06 11:12:04 -04003328 p = xdr_reserve_space(xdr, 20);
3329 if (!p)
3330 return nfserr_resource;
3331 p = encode_cinfo(p, &link->li_cinfo);
3332 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003333}
3334
3335
Benny Halevy695e12f2008-07-04 14:38:33 +03003336static __be32
Al Virob37ad282006-10-19 23:28:59 -07003337nfsd4_encode_open(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open *open)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003338{
J. Bruce Fieldsd0a381d2014-01-30 17:18:38 -05003339 struct xdr_stream *xdr = &resp->xdr;
J. Bruce Fieldsbc749ca2009-04-07 16:55:27 -07003340 __be32 *p;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003341
J. Bruce Fieldsd0a381d2014-01-30 17:18:38 -05003342 nfserr = nfsd4_encode_stateid(xdr, &open->op_stateid);
3343 if (nfserr)
J. Bruce Fieldsbac966d2017-05-06 11:12:04 -04003344 return nfserr;
Kinglong Mee75976de2015-07-30 21:55:30 +08003345 p = xdr_reserve_space(xdr, 24);
J. Bruce Fieldsd0a381d2014-01-30 17:18:38 -05003346 if (!p)
3347 return nfserr_resource;
J. Bruce Fieldsd05d5742014-03-22 18:48:39 -04003348 p = encode_cinfo(p, &open->op_cinfo);
J. Bruce Fieldsc373b0a2014-03-22 17:09:18 -04003349 *p++ = cpu_to_be32(open->op_rflags);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003350
Kinglong Mee75976de2015-07-30 21:55:30 +08003351 nfserr = nfsd4_encode_bitmap(xdr, open->op_bmval[0], open->op_bmval[1],
3352 open->op_bmval[2]);
3353 if (nfserr)
J. Bruce Fieldsbac966d2017-05-06 11:12:04 -04003354 return nfserr;
Kinglong Mee75976de2015-07-30 21:55:30 +08003355
3356 p = xdr_reserve_space(xdr, 4);
3357 if (!p)
3358 return nfserr_resource;
3359
3360 *p++ = cpu_to_be32(open->op_delegate_type);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003361 switch (open->op_delegate_type) {
3362 case NFS4_OPEN_DELEGATE_NONE:
3363 break;
3364 case NFS4_OPEN_DELEGATE_READ:
J. Bruce Fieldsd0a381d2014-01-30 17:18:38 -05003365 nfserr = nfsd4_encode_stateid(xdr, &open->op_delegate_stateid);
3366 if (nfserr)
3367 return nfserr;
3368 p = xdr_reserve_space(xdr, 20);
3369 if (!p)
3370 return nfserr_resource;
J. Bruce Fieldsc373b0a2014-03-22 17:09:18 -04003371 *p++ = cpu_to_be32(open->op_recall);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003372
3373 /*
3374 * TODO: ACE's in delegations
3375 */
J. Bruce Fieldsc373b0a2014-03-22 17:09:18 -04003376 *p++ = cpu_to_be32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
3377 *p++ = cpu_to_be32(0);
3378 *p++ = cpu_to_be32(0);
3379 *p++ = cpu_to_be32(0); /* XXX: is NULL principal ok? */
Linus Torvalds1da177e2005-04-16 15:20:36 -07003380 break;
3381 case NFS4_OPEN_DELEGATE_WRITE:
J. Bruce Fieldsd0a381d2014-01-30 17:18:38 -05003382 nfserr = nfsd4_encode_stateid(xdr, &open->op_delegate_stateid);
3383 if (nfserr)
3384 return nfserr;
3385 p = xdr_reserve_space(xdr, 32);
3386 if (!p)
3387 return nfserr_resource;
J. Bruce Fieldsc373b0a2014-03-22 17:09:18 -04003388 *p++ = cpu_to_be32(0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003389
3390 /*
3391 * TODO: space_limit's in delegations
3392 */
J. Bruce Fieldsc373b0a2014-03-22 17:09:18 -04003393 *p++ = cpu_to_be32(NFS4_LIMIT_SIZE);
3394 *p++ = cpu_to_be32(~(u32)0);
3395 *p++ = cpu_to_be32(~(u32)0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003396
3397 /*
3398 * TODO: ACE's in delegations
3399 */
J. Bruce Fieldsc373b0a2014-03-22 17:09:18 -04003400 *p++ = cpu_to_be32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
3401 *p++ = cpu_to_be32(0);
3402 *p++ = cpu_to_be32(0);
3403 *p++ = cpu_to_be32(0); /* XXX: is NULL principal ok? */
Linus Torvalds1da177e2005-04-16 15:20:36 -07003404 break;
Benny Halevyd24433c2012-02-16 20:57:17 +02003405 case NFS4_OPEN_DELEGATE_NONE_EXT: /* 4.1 */
3406 switch (open->op_why_no_deleg) {
3407 case WND4_CONTENTION:
3408 case WND4_RESOURCE:
J. Bruce Fieldsd0a381d2014-01-30 17:18:38 -05003409 p = xdr_reserve_space(xdr, 8);
3410 if (!p)
3411 return nfserr_resource;
J. Bruce Fieldsc373b0a2014-03-22 17:09:18 -04003412 *p++ = cpu_to_be32(open->op_why_no_deleg);
3413 /* deleg signaling not supported yet: */
3414 *p++ = cpu_to_be32(0);
Benny Halevyd24433c2012-02-16 20:57:17 +02003415 break;
3416 default:
J. Bruce Fieldsd0a381d2014-01-30 17:18:38 -05003417 p = xdr_reserve_space(xdr, 4);
3418 if (!p)
3419 return nfserr_resource;
J. Bruce Fieldsc373b0a2014-03-22 17:09:18 -04003420 *p++ = cpu_to_be32(open->op_why_no_deleg);
Benny Halevyd24433c2012-02-16 20:57:17 +02003421 }
Benny Halevyd24433c2012-02-16 20:57:17 +02003422 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003423 default:
3424 BUG();
3425 }
3426 /* XXX save filehandle here */
J. Bruce Fieldsbac966d2017-05-06 11:12:04 -04003427 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003428}
3429
Benny Halevy695e12f2008-07-04 14:38:33 +03003430static __be32
Al Virob37ad282006-10-19 23:28:59 -07003431nfsd4_encode_open_confirm(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_confirm *oc)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003432{
J. Bruce Fieldsd0a381d2014-01-30 17:18:38 -05003433 struct xdr_stream *xdr = &resp->xdr;
3434
J. Bruce Fieldsbac966d2017-05-06 11:12:04 -04003435 return nfsd4_encode_stateid(xdr, &oc->oc_resp_stateid);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003436}
3437
Benny Halevy695e12f2008-07-04 14:38:33 +03003438static __be32
Al Virob37ad282006-10-19 23:28:59 -07003439nfsd4_encode_open_downgrade(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_downgrade *od)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003440{
J. Bruce Fieldsd0a381d2014-01-30 17:18:38 -05003441 struct xdr_stream *xdr = &resp->xdr;
3442
J. Bruce Fieldsbac966d2017-05-06 11:12:04 -04003443 return nfsd4_encode_stateid(xdr, &od->od_stateid);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003444}
3445
J. Bruce Fieldsdc976182014-03-18 17:01:51 -04003446static __be32 nfsd4_encode_splice_read(
3447 struct nfsd4_compoundres *resp,
3448 struct nfsd4_read *read,
3449 struct file *file, unsigned long maxcount)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003450{
J. Bruce Fieldsdc976182014-03-18 17:01:51 -04003451 struct xdr_stream *xdr = &resp->xdr;
J. Bruce Fields34a78b482014-05-13 16:32:04 -04003452 struct xdr_buf *buf = xdr->buf;
J. Bruce Fieldsdc976182014-03-18 17:01:51 -04003453 u32 eof;
Benjamin Coddingtonac503e42016-03-22 10:28:36 -04003454 long len;
J. Bruce Fieldsdc976182014-03-18 17:01:51 -04003455 int space_left;
3456 __be32 nfserr;
J. Bruce Fieldsfec25fa2014-05-13 17:27:03 -04003457 __be32 *p = xdr->p - 2;
J. Bruce Fieldsdc976182014-03-18 17:01:51 -04003458
Kinglong Meed5d5c302014-07-09 21:51:27 +08003459 /* Make sure there will be room for padding if needed */
3460 if (xdr->end - xdr->p < 1)
J. Bruce Fieldsdc976182014-03-18 17:01:51 -04003461 return nfserr_resource;
3462
Benjamin Coddingtonac503e42016-03-22 10:28:36 -04003463 len = maxcount;
Chuck Lever87c59422018-03-28 13:29:11 -04003464 nfserr = nfsd_splice_read(read->rd_rqstp, read->rd_fhp,
3465 file, read->rd_offset, &maxcount);
3466 read->rd_length = maxcount;
J. Bruce Fieldsdc976182014-03-18 17:01:51 -04003467 if (nfserr) {
3468 /*
3469 * nfsd_splice_actor may have already messed with the
3470 * page length; reset it so as not to confuse
3471 * xdr_truncate_encode:
3472 */
J. Bruce Fields34a78b482014-05-13 16:32:04 -04003473 buf->page_len = 0;
J. Bruce Fieldsdc976182014-03-18 17:01:51 -04003474 return nfserr;
3475 }
3476
Benjamin Coddingtonac503e42016-03-22 10:28:36 -04003477 eof = nfsd_eof_on_read(len, maxcount, read->rd_offset,
3478 d_inode(read->rd_fhp->fh_dentry)->i_size);
J. Bruce Fieldsdc976182014-03-18 17:01:51 -04003479
J. Bruce Fieldsfec25fa2014-05-13 17:27:03 -04003480 *(p++) = htonl(eof);
3481 *(p++) = htonl(maxcount);
J. Bruce Fieldsdc976182014-03-18 17:01:51 -04003482
J. Bruce Fields34a78b482014-05-13 16:32:04 -04003483 buf->page_len = maxcount;
3484 buf->len += maxcount;
J. Bruce Fields15b23ef2014-09-24 16:32:34 -04003485 xdr->page_ptr += (buf->page_base + maxcount + PAGE_SIZE - 1)
3486 / PAGE_SIZE;
J. Bruce Fieldsdc976182014-03-18 17:01:51 -04003487
3488 /* Use rest of head for padding and remaining ops: */
J. Bruce Fields34a78b482014-05-13 16:32:04 -04003489 buf->tail[0].iov_base = xdr->p;
3490 buf->tail[0].iov_len = 0;
J. Bruce Fieldsfec25fa2014-05-13 17:27:03 -04003491 xdr->iov = buf->tail;
J. Bruce Fieldsdc976182014-03-18 17:01:51 -04003492 if (maxcount&3) {
J. Bruce Fieldsfec25fa2014-05-13 17:27:03 -04003493 int pad = 4 - (maxcount&3);
3494
3495 *(xdr->p++) = 0;
3496
J. Bruce Fields34a78b482014-05-13 16:32:04 -04003497 buf->tail[0].iov_base += maxcount&3;
J. Bruce Fieldsfec25fa2014-05-13 17:27:03 -04003498 buf->tail[0].iov_len = pad;
3499 buf->len += pad;
J. Bruce Fieldsdc976182014-03-18 17:01:51 -04003500 }
3501
3502 space_left = min_t(int, (void *)xdr->end - (void *)xdr->p,
J. Bruce Fields34a78b482014-05-13 16:32:04 -04003503 buf->buflen - buf->len);
3504 buf->buflen = buf->len + space_left;
J. Bruce Fieldsdc976182014-03-18 17:01:51 -04003505 xdr->end = (__be32 *)((void *)xdr->end + space_left);
3506
3507 return 0;
3508}
3509
3510static __be32 nfsd4_encode_readv(struct nfsd4_compoundres *resp,
3511 struct nfsd4_read *read,
3512 struct file *file, unsigned long maxcount)
3513{
3514 struct xdr_stream *xdr = &resp->xdr;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003515 u32 eof;
J. Bruce Fieldsafc59402012-12-10 18:01:37 -05003516 int v;
J. Bruce Fieldsdc976182014-03-18 17:01:51 -04003517 int starting_len = xdr->buf->len - 8;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003518 long len;
J. Bruce Fieldsb0420982014-03-18 17:44:10 -04003519 int thislen;
J. Bruce Fieldsdc976182014-03-18 17:01:51 -04003520 __be32 nfserr;
3521 __be32 tmp;
J. Bruce Fieldsbc749ca2009-04-07 16:55:27 -07003522 __be32 *p;
J. Bruce Fieldsb0420982014-03-18 17:44:10 -04003523 u32 zzz = 0;
3524 int pad;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003525
Linus Torvalds1da177e2005-04-16 15:20:36 -07003526 len = maxcount;
3527 v = 0;
J. Bruce Fields6ff98972014-03-11 16:51:23 -04003528
Kinglong Mee10554142014-06-29 19:18:17 +08003529 thislen = min_t(long, len, ((void *)xdr->end - (void *)xdr->p));
J. Bruce Fieldsb0420982014-03-18 17:44:10 -04003530 p = xdr_reserve_space(xdr, (thislen+3)&~3);
3531 WARN_ON_ONCE(!p);
3532 resp->rqstp->rq_vec[v].iov_base = p;
3533 resp->rqstp->rq_vec[v].iov_len = thislen;
3534 v++;
3535 len -= thislen;
3536
3537 while (len) {
J. Bruce Fields6ff98972014-03-11 16:51:23 -04003538 thislen = min_t(long, len, PAGE_SIZE);
J. Bruce Fieldsb0420982014-03-18 17:44:10 -04003539 p = xdr_reserve_space(xdr, (thislen+3)&~3);
3540 WARN_ON_ONCE(!p);
3541 resp->rqstp->rq_vec[v].iov_base = p;
J. Bruce Fields6ff98972014-03-11 16:51:23 -04003542 resp->rqstp->rq_vec[v].iov_len = thislen;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003543 v++;
J. Bruce Fields6ff98972014-03-11 16:51:23 -04003544 len -= thislen;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003545 }
3546 read->rd_vlen = v;
3547
Benjamin Coddingtonac503e42016-03-22 10:28:36 -04003548 len = maxcount;
Chuck Lever87c59422018-03-28 13:29:11 -04003549 nfserr = nfsd_readv(resp->rqstp, read->rd_fhp, file, read->rd_offset,
3550 resp->rqstp->rq_vec, read->rd_vlen, &maxcount);
3551 read->rd_length = maxcount;
J. Bruce Fieldsdc976182014-03-18 17:01:51 -04003552 if (nfserr)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003553 return nfserr;
J. Bruce Fieldsb0420982014-03-18 17:44:10 -04003554 xdr_truncate_encode(xdr, starting_len + 8 + ((maxcount+3)&~3));
J. Bruce Fieldsdc976182014-03-18 17:01:51 -04003555
Benjamin Coddingtonac503e42016-03-22 10:28:36 -04003556 eof = nfsd_eof_on_read(len, maxcount, read->rd_offset,
3557 d_inode(read->rd_fhp->fh_dentry)->i_size);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003558
J. Bruce Fieldsdc976182014-03-18 17:01:51 -04003559 tmp = htonl(eof);
3560 write_bytes_to_xdr_buf(xdr->buf, starting_len , &tmp, 4);
3561 tmp = htonl(maxcount);
3562 write_bytes_to_xdr_buf(xdr->buf, starting_len + 4, &tmp, 4);
3563
J. Bruce Fieldsb0420982014-03-18 17:44:10 -04003564 pad = (maxcount&3) ? 4 - (maxcount&3) : 0;
3565 write_bytes_to_xdr_buf(xdr->buf, starting_len + 8 + maxcount,
3566 &zzz, pad);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003567 return 0;
J. Bruce Fieldsdc976182014-03-18 17:01:51 -04003568
3569}
3570
3571static __be32
3572nfsd4_encode_read(struct nfsd4_compoundres *resp, __be32 nfserr,
3573 struct nfsd4_read *read)
3574{
3575 unsigned long maxcount;
3576 struct xdr_stream *xdr = &resp->xdr;
3577 struct file *file = read->rd_filp;
3578 int starting_len = xdr->buf->len;
Christoph Hellwige749a462015-06-18 16:44:58 +02003579 struct raparms *ra = NULL;
J. Bruce Fieldsdc976182014-03-18 17:01:51 -04003580 __be32 *p;
J. Bruce Fieldsdc976182014-03-18 17:01:51 -04003581
J. Bruce Fieldsdc976182014-03-18 17:01:51 -04003582 p = xdr_reserve_space(xdr, 8); /* eof flag and byte count */
3583 if (!p) {
Jeff Layton779fb0f2014-11-19 07:51:18 -05003584 WARN_ON_ONCE(test_bit(RQ_SPLICE_OK, &resp->rqstp->rq_flags));
J. Bruce Fieldsbac966d2017-05-06 11:12:04 -04003585 return nfserr_resource;
J. Bruce Fieldsdc976182014-03-18 17:01:51 -04003586 }
Christoph Hellwig68e8bb02015-06-18 16:45:02 +02003587 if (resp->xdr.buf->page_len &&
3588 test_bit(RQ_SPLICE_OK, &resp->rqstp->rq_flags)) {
J. Bruce Fieldsb0420982014-03-18 17:44:10 -04003589 WARN_ON_ONCE(1);
J. Bruce Fieldsbac966d2017-05-06 11:12:04 -04003590 return nfserr_resource;
J. Bruce Fieldsdc976182014-03-18 17:01:51 -04003591 }
J. Bruce Fieldsdc976182014-03-18 17:01:51 -04003592 xdr_commit_encode(xdr);
3593
3594 maxcount = svc_max_payload(resp->rqstp);
Christoph Hellwig68e8bb02015-06-18 16:45:02 +02003595 maxcount = min_t(unsigned long, maxcount,
3596 (xdr->buf->buflen - xdr->buf->len));
Kinglong Mee3c7aa152014-06-10 18:08:19 +08003597 maxcount = min_t(unsigned long, maxcount, read->rd_length);
J. Bruce Fieldsdc976182014-03-18 17:01:51 -04003598
Christoph Hellwigaf90f702015-06-18 16:45:00 +02003599 if (read->rd_tmp_file)
Christoph Hellwige749a462015-06-18 16:44:58 +02003600 ra = nfsd_init_raparms(file);
J. Bruce Fieldsdc976182014-03-18 17:01:51 -04003601
Christoph Hellwig68e8bb02015-06-18 16:45:02 +02003602 if (file->f_op->splice_read &&
3603 test_bit(RQ_SPLICE_OK, &resp->rqstp->rq_flags))
Christoph Hellwig96bcad52015-06-18 16:45:01 +02003604 nfserr = nfsd4_encode_splice_read(resp, read, file, maxcount);
J. Bruce Fieldsdc976182014-03-18 17:01:51 -04003605 else
Christoph Hellwig96bcad52015-06-18 16:45:01 +02003606 nfserr = nfsd4_encode_readv(resp, read, file, maxcount);
J. Bruce Fieldsdc976182014-03-18 17:01:51 -04003607
Christoph Hellwige749a462015-06-18 16:44:58 +02003608 if (ra)
3609 nfsd_put_raparams(file, ra);
J. Bruce Fieldsdc976182014-03-18 17:01:51 -04003610
Christoph Hellwig96bcad52015-06-18 16:45:01 +02003611 if (nfserr)
J. Bruce Fieldsdc976182014-03-18 17:01:51 -04003612 xdr_truncate_encode(xdr, starting_len);
Christoph Hellwig96bcad52015-06-18 16:45:01 +02003613
Christoph Hellwig96bcad52015-06-18 16:45:01 +02003614 return nfserr;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003615}
3616
Al Virob37ad282006-10-19 23:28:59 -07003617static __be32
3618nfsd4_encode_readlink(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readlink *readlink)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003619{
3620 int maxcount;
J. Bruce Fields476a7b12014-01-20 17:08:27 -05003621 __be32 wire_count;
3622 int zero = 0;
J. Bruce Fieldsddd1ea52013-08-27 21:32:25 -04003623 struct xdr_stream *xdr = &resp->xdr;
J. Bruce Fields1fcea5b2014-02-26 20:17:02 -05003624 int length_offset = xdr->buf->len;
J. Bruce Fieldsbc749ca2009-04-07 16:55:27 -07003625 __be32 *p;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003626
J. Bruce Fields2825a7f2013-08-26 16:04:46 -04003627 p = xdr_reserve_space(xdr, 4);
3628 if (!p)
3629 return nfserr_resource;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003630 maxcount = PAGE_SIZE;
J. Bruce Fieldsd0a381d2014-01-30 17:18:38 -05003631
J. Bruce Fields476a7b12014-01-20 17:08:27 -05003632 p = xdr_reserve_space(xdr, maxcount);
3633 if (!p)
J. Bruce Fields4e21ac42014-03-22 15:15:11 -04003634 return nfserr_resource;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003635 /*
Miklos Szeredifd4a0edf2016-12-09 16:45:04 +01003636 * XXX: By default, vfs_readlink() will truncate symlinks if they
3637 * would overflow the buffer. Is this kosher in NFSv4? If not, one
3638 * easy fix is: if vfs_readlink() precisely fills the buffer, assume
3639 * that truncation occurred, and return NFS4ERR_RESOURCE.
Linus Torvalds1da177e2005-04-16 15:20:36 -07003640 */
J. Bruce Fields476a7b12014-01-20 17:08:27 -05003641 nfserr = nfsd_readlink(readlink->rl_rqstp, readlink->rl_fhp,
3642 (char *)p, &maxcount);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003643 if (nfserr == nfserr_isdir)
J. Bruce Fieldsd3f627c2014-02-26 17:00:38 -05003644 nfserr = nfserr_inval;
3645 if (nfserr) {
J. Bruce Fields1fcea5b2014-02-26 20:17:02 -05003646 xdr_truncate_encode(xdr, length_offset);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003647 return nfserr;
J. Bruce Fieldsd3f627c2014-02-26 17:00:38 -05003648 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07003649
J. Bruce Fields476a7b12014-01-20 17:08:27 -05003650 wire_count = htonl(maxcount);
3651 write_bytes_to_xdr_buf(xdr->buf, length_offset, &wire_count, 4);
Avi Kivity69bbd9c2014-06-26 17:23:12 +03003652 xdr_truncate_encode(xdr, length_offset + 4 + ALIGN(maxcount, 4));
J. Bruce Fields476a7b12014-01-20 17:08:27 -05003653 if (maxcount & 3)
3654 write_bytes_to_xdr_buf(xdr->buf, length_offset + 4 + maxcount,
3655 &zero, 4 - (maxcount&3));
Linus Torvalds1da177e2005-04-16 15:20:36 -07003656 return 0;
3657}
3658
Al Virob37ad282006-10-19 23:28:59 -07003659static __be32
3660nfsd4_encode_readdir(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readdir *readdir)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003661{
3662 int maxcount;
J. Bruce Fields561f0ed2014-01-20 16:37:11 -05003663 int bytes_left;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003664 loff_t offset;
J. Bruce Fields561f0ed2014-01-20 16:37:11 -05003665 __be64 wire_offset;
J. Bruce Fieldsddd1ea52013-08-27 21:32:25 -04003666 struct xdr_stream *xdr = &resp->xdr;
J. Bruce Fields1fcea5b2014-02-26 20:17:02 -05003667 int starting_len = xdr->buf->len;
J. Bruce Fieldsbc749ca2009-04-07 16:55:27 -07003668 __be32 *p;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003669
J. Bruce Fieldsd0a381d2014-01-30 17:18:38 -05003670 p = xdr_reserve_space(xdr, NFS4_VERIFIER_SIZE);
3671 if (!p)
3672 return nfserr_resource;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003673
3674 /* XXX: Following NFSv3, we ignore the READDIR verifier for now. */
J. Bruce Fieldsc373b0a2014-03-22 17:09:18 -04003675 *p++ = cpu_to_be32(0);
3676 *p++ = cpu_to_be32(0);
J. Bruce Fields4aea24b2014-01-15 15:17:58 -05003677 resp->xdr.buf->head[0].iov_len = ((char *)resp->xdr.p)
3678 - (char *)resp->xdr.buf->head[0].iov_base;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003679
3680 /*
J. Bruce Fields561f0ed2014-01-20 16:37:11 -05003681 * Number of bytes left for directory entries allowing for the
3682 * final 8 bytes of the readdir and a following failed op:
Linus Torvalds1da177e2005-04-16 15:20:36 -07003683 */
J. Bruce Fields561f0ed2014-01-20 16:37:11 -05003684 bytes_left = xdr->buf->buflen - xdr->buf->len
3685 - COMPOUND_ERR_SLACK_SPACE - 8;
3686 if (bytes_left < 0) {
3687 nfserr = nfserr_resource;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003688 goto err_no_verf;
3689 }
Scott Mayhew9c2ece62018-05-07 09:01:08 -04003690 maxcount = svc_max_payload(resp->rqstp);
3691 maxcount = min_t(u32, readdir->rd_maxcount, maxcount);
J. Bruce Fields561f0ed2014-01-20 16:37:11 -05003692 /*
3693 * Note the rfc defines rd_maxcount as the size of the
3694 * READDIR4resok structure, which includes the verifier above
3695 * and the 8 bytes encoded at the end of this function:
3696 */
3697 if (maxcount < 16) {
3698 nfserr = nfserr_toosmall;
3699 goto err_no_verf;
3700 }
3701 maxcount = min_t(int, maxcount-16, bytes_left);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003702
J. Bruce Fieldsaee37762014-08-20 14:49:50 -04003703 /* RFC 3530 14.2.24 allows us to ignore dircount when it's 0: */
3704 if (!readdir->rd_dircount)
Scott Mayhew9c2ece62018-05-07 09:01:08 -04003705 readdir->rd_dircount = svc_max_payload(resp->rqstp);
J. Bruce Fieldsaee37762014-08-20 14:49:50 -04003706
J. Bruce Fields561f0ed2014-01-20 16:37:11 -05003707 readdir->xdr = xdr;
3708 readdir->rd_maxcount = maxcount;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003709 readdir->common.err = 0;
J. Bruce Fields561f0ed2014-01-20 16:37:11 -05003710 readdir->cookie_offset = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003711
3712 offset = readdir->rd_cookie;
3713 nfserr = nfsd_readdir(readdir->rd_rqstp, readdir->rd_fhp,
3714 &offset,
3715 &readdir->common, nfsd4_encode_dirent);
3716 if (nfserr == nfs_ok &&
3717 readdir->common.err == nfserr_toosmall &&
J. Bruce Fields561f0ed2014-01-20 16:37:11 -05003718 xdr->buf->len == starting_len + 8) {
3719 /* nothing encoded; which limit did we hit?: */
3720 if (maxcount - 16 < bytes_left)
3721 /* It was the fault of rd_maxcount: */
3722 nfserr = nfserr_toosmall;
3723 else
3724 /* We ran out of buffer space: */
3725 nfserr = nfserr_resource;
3726 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07003727 if (nfserr)
3728 goto err_no_verf;
3729
J. Bruce Fields561f0ed2014-01-20 16:37:11 -05003730 if (readdir->cookie_offset) {
3731 wire_offset = cpu_to_be64(offset);
3732 write_bytes_to_xdr_buf(xdr->buf, readdir->cookie_offset,
3733 &wire_offset, 8);
3734 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07003735
J. Bruce Fields561f0ed2014-01-20 16:37:11 -05003736 p = xdr_reserve_space(xdr, 8);
3737 if (!p) {
3738 WARN_ON_ONCE(1);
3739 goto err_no_verf;
3740 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07003741 *p++ = 0; /* no more entries */
3742 *p++ = htonl(readdir->common.err == nfserr_eof);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003743
3744 return 0;
3745err_no_verf:
J. Bruce Fields1fcea5b2014-02-26 20:17:02 -05003746 xdr_truncate_encode(xdr, starting_len);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003747 return nfserr;
3748}
3749
Benny Halevy695e12f2008-07-04 14:38:33 +03003750static __be32
Al Virob37ad282006-10-19 23:28:59 -07003751nfsd4_encode_remove(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_remove *remove)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003752{
J. Bruce Fieldsd0a381d2014-01-30 17:18:38 -05003753 struct xdr_stream *xdr = &resp->xdr;
J. Bruce Fieldsbc749ca2009-04-07 16:55:27 -07003754 __be32 *p;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003755
J. Bruce Fieldsbac966d2017-05-06 11:12:04 -04003756 p = xdr_reserve_space(xdr, 20);
3757 if (!p)
3758 return nfserr_resource;
3759 p = encode_cinfo(p, &remove->rm_cinfo);
3760 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003761}
3762
Benny Halevy695e12f2008-07-04 14:38:33 +03003763static __be32
Al Virob37ad282006-10-19 23:28:59 -07003764nfsd4_encode_rename(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_rename *rename)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003765{
J. Bruce Fieldsd0a381d2014-01-30 17:18:38 -05003766 struct xdr_stream *xdr = &resp->xdr;
J. Bruce Fieldsbc749ca2009-04-07 16:55:27 -07003767 __be32 *p;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003768
J. Bruce Fieldsbac966d2017-05-06 11:12:04 -04003769 p = xdr_reserve_space(xdr, 40);
3770 if (!p)
3771 return nfserr_resource;
3772 p = encode_cinfo(p, &rename->rn_sinfo);
3773 p = encode_cinfo(p, &rename->rn_tinfo);
3774 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003775}
3776
Benny Halevy695e12f2008-07-04 14:38:33 +03003777static __be32
J. Bruce Fieldsbac966d2017-05-06 11:12:04 -04003778nfsd4_do_encode_secinfo(struct xdr_stream *xdr, struct svc_export *exp)
Andy Adamsondcb488a32007-07-17 04:04:51 -07003779{
Chuck Lever676e4eb2013-04-30 18:48:54 -04003780 u32 i, nflavs, supported;
J. Bruce Fields4796f452007-07-17 04:04:51 -07003781 struct exp_flavor_info *flavs;
3782 struct exp_flavor_info def_flavs[2];
Chuck Lever676e4eb2013-04-30 18:48:54 -04003783 __be32 *p, *flavorsp;
3784 static bool report = true;
Andy Adamsondcb488a32007-07-17 04:04:51 -07003785
J. Bruce Fields4796f452007-07-17 04:04:51 -07003786 if (exp->ex_nflavors) {
3787 flavs = exp->ex_flavors;
3788 nflavs = exp->ex_nflavors;
3789 } else { /* Handling of some defaults in absence of real secinfo: */
3790 flavs = def_flavs;
3791 if (exp->ex_client->flavour->flavour == RPC_AUTH_UNIX) {
3792 nflavs = 2;
3793 flavs[0].pseudoflavor = RPC_AUTH_UNIX;
3794 flavs[1].pseudoflavor = RPC_AUTH_NULL;
3795 } else if (exp->ex_client->flavour->flavour == RPC_AUTH_GSS) {
3796 nflavs = 1;
3797 flavs[0].pseudoflavor
3798 = svcauth_gss_flavor(exp->ex_client);
3799 } else {
3800 nflavs = 1;
3801 flavs[0].pseudoflavor
3802 = exp->ex_client->flavour->flavour;
3803 }
3804 }
3805
Chuck Lever676e4eb2013-04-30 18:48:54 -04003806 supported = 0;
J. Bruce Fieldsd0a381d2014-01-30 17:18:38 -05003807 p = xdr_reserve_space(xdr, 4);
3808 if (!p)
J. Bruce Fieldsbac966d2017-05-06 11:12:04 -04003809 return nfserr_resource;
Chuck Lever676e4eb2013-04-30 18:48:54 -04003810 flavorsp = p++; /* to be backfilled later */
Chuck Lever676e4eb2013-04-30 18:48:54 -04003811
J. Bruce Fields4796f452007-07-17 04:04:51 -07003812 for (i = 0; i < nflavs; i++) {
Chuck Lever676e4eb2013-04-30 18:48:54 -04003813 rpc_authflavor_t pf = flavs[i].pseudoflavor;
Chuck Levera77c8062013-03-16 15:55:10 -04003814 struct rpcsec_gss_info info;
Andy Adamsondcb488a32007-07-17 04:04:51 -07003815
Chuck Lever676e4eb2013-04-30 18:48:54 -04003816 if (rpcauth_get_gssinfo(pf, &info) == 0) {
3817 supported++;
J. Bruce Fieldsd0a381d2014-01-30 17:18:38 -05003818 p = xdr_reserve_space(xdr, 4 + 4 +
3819 XDR_LEN(info.oid.len) + 4 + 4);
3820 if (!p)
J. Bruce Fieldsbac966d2017-05-06 11:12:04 -04003821 return nfserr_resource;
J. Bruce Fieldsc373b0a2014-03-22 17:09:18 -04003822 *p++ = cpu_to_be32(RPC_AUTH_GSS);
J. Bruce Fields0c0c2672014-03-22 18:43:16 -04003823 p = xdr_encode_opaque(p, info.oid.data, info.oid.len);
J. Bruce Fieldsc373b0a2014-03-22 17:09:18 -04003824 *p++ = cpu_to_be32(info.qop);
3825 *p++ = cpu_to_be32(info.service);
Chuck Lever676e4eb2013-04-30 18:48:54 -04003826 } else if (pf < RPC_AUTH_MAXFLAVOR) {
3827 supported++;
J. Bruce Fieldsd0a381d2014-01-30 17:18:38 -05003828 p = xdr_reserve_space(xdr, 4);
3829 if (!p)
J. Bruce Fieldsbac966d2017-05-06 11:12:04 -04003830 return nfserr_resource;
J. Bruce Fieldsc373b0a2014-03-22 17:09:18 -04003831 *p++ = cpu_to_be32(pf);
Chuck Lever676e4eb2013-04-30 18:48:54 -04003832 } else {
3833 if (report)
3834 pr_warn("NFS: SECINFO: security flavor %u "
3835 "is not supported\n", pf);
Andy Adamsondcb488a32007-07-17 04:04:51 -07003836 }
3837 }
Chuck Levera77c8062013-03-16 15:55:10 -04003838
Chuck Lever676e4eb2013-04-30 18:48:54 -04003839 if (nflavs != supported)
3840 report = false;
3841 *flavorsp = htonl(supported);
J. Bruce Fieldsbac966d2017-05-06 11:12:04 -04003842 return 0;
Andy Adamsondcb488a32007-07-17 04:04:51 -07003843}
3844
Mi Jinlong22b6dee2010-12-27 14:29:57 +08003845static __be32
3846nfsd4_encode_secinfo(struct nfsd4_compoundres *resp, __be32 nfserr,
3847 struct nfsd4_secinfo *secinfo)
3848{
J. Bruce Fieldsd0a381d2014-01-30 17:18:38 -05003849 struct xdr_stream *xdr = &resp->xdr;
3850
J. Bruce Fieldsbac966d2017-05-06 11:12:04 -04003851 return nfsd4_do_encode_secinfo(xdr, secinfo->si_exp);
Mi Jinlong22b6dee2010-12-27 14:29:57 +08003852}
3853
3854static __be32
3855nfsd4_encode_secinfo_no_name(struct nfsd4_compoundres *resp, __be32 nfserr,
3856 struct nfsd4_secinfo_no_name *secinfo)
3857{
J. Bruce Fieldsd0a381d2014-01-30 17:18:38 -05003858 struct xdr_stream *xdr = &resp->xdr;
3859
J. Bruce Fieldsbac966d2017-05-06 11:12:04 -04003860 return nfsd4_do_encode_secinfo(xdr, secinfo->sin_exp);
Mi Jinlong22b6dee2010-12-27 14:29:57 +08003861}
3862
Linus Torvalds1da177e2005-04-16 15:20:36 -07003863/*
3864 * The SETATTR encode routine is special -- it always encodes a bitmap,
3865 * regardless of the error status.
3866 */
Benny Halevy695e12f2008-07-04 14:38:33 +03003867static __be32
Al Virob37ad282006-10-19 23:28:59 -07003868nfsd4_encode_setattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setattr *setattr)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003869{
J. Bruce Fieldsd0a381d2014-01-30 17:18:38 -05003870 struct xdr_stream *xdr = &resp->xdr;
J. Bruce Fieldsbc749ca2009-04-07 16:55:27 -07003871 __be32 *p;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003872
J. Bruce Fieldsd0a381d2014-01-30 17:18:38 -05003873 p = xdr_reserve_space(xdr, 16);
3874 if (!p)
3875 return nfserr_resource;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003876 if (nfserr) {
J. Bruce Fieldsc373b0a2014-03-22 17:09:18 -04003877 *p++ = cpu_to_be32(3);
3878 *p++ = cpu_to_be32(0);
3879 *p++ = cpu_to_be32(0);
3880 *p++ = cpu_to_be32(0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003881 }
3882 else {
J. Bruce Fieldsc373b0a2014-03-22 17:09:18 -04003883 *p++ = cpu_to_be32(3);
3884 *p++ = cpu_to_be32(setattr->sa_bmval[0]);
3885 *p++ = cpu_to_be32(setattr->sa_bmval[1]);
3886 *p++ = cpu_to_be32(setattr->sa_bmval[2]);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003887 }
Benny Halevy695e12f2008-07-04 14:38:33 +03003888 return nfserr;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003889}
3890
Benny Halevy695e12f2008-07-04 14:38:33 +03003891static __be32
Al Virob37ad282006-10-19 23:28:59 -07003892nfsd4_encode_setclientid(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setclientid *scd)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003893{
J. Bruce Fieldsd0a381d2014-01-30 17:18:38 -05003894 struct xdr_stream *xdr = &resp->xdr;
J. Bruce Fieldsbc749ca2009-04-07 16:55:27 -07003895 __be32 *p;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003896
3897 if (!nfserr) {
J. Bruce Fieldsd0a381d2014-01-30 17:18:38 -05003898 p = xdr_reserve_space(xdr, 8 + NFS4_VERIFIER_SIZE);
3899 if (!p)
3900 return nfserr_resource;
J. Bruce Fields0c0c2672014-03-22 18:43:16 -04003901 p = xdr_encode_opaque_fixed(p, &scd->se_clientid, 8);
3902 p = xdr_encode_opaque_fixed(p, &scd->se_confirm,
3903 NFS4_VERIFIER_SIZE);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003904 }
3905 else if (nfserr == nfserr_clid_inuse) {
J. Bruce Fieldsd0a381d2014-01-30 17:18:38 -05003906 p = xdr_reserve_space(xdr, 8);
3907 if (!p)
3908 return nfserr_resource;
J. Bruce Fieldsc373b0a2014-03-22 17:09:18 -04003909 *p++ = cpu_to_be32(0);
3910 *p++ = cpu_to_be32(0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003911 }
Benny Halevy695e12f2008-07-04 14:38:33 +03003912 return nfserr;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003913}
3914
Benny Halevy695e12f2008-07-04 14:38:33 +03003915static __be32
Al Virob37ad282006-10-19 23:28:59 -07003916nfsd4_encode_write(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_write *write)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003917{
J. Bruce Fieldsd0a381d2014-01-30 17:18:38 -05003918 struct xdr_stream *xdr = &resp->xdr;
J. Bruce Fieldsbc749ca2009-04-07 16:55:27 -07003919 __be32 *p;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003920
J. Bruce Fieldsbac966d2017-05-06 11:12:04 -04003921 p = xdr_reserve_space(xdr, 16);
3922 if (!p)
3923 return nfserr_resource;
3924 *p++ = cpu_to_be32(write->wr_bytes_written);
3925 *p++ = cpu_to_be32(write->wr_how_written);
3926 p = xdr_encode_opaque_fixed(p, write->wr_verifier.data,
3927 NFS4_VERIFIER_SIZE);
3928 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003929}
3930
Benny Halevy695e12f2008-07-04 14:38:33 +03003931static __be32
J. Bruce Fields57b7b432012-04-25 17:58:50 -04003932nfsd4_encode_exchange_id(struct nfsd4_compoundres *resp, __be32 nfserr,
Andy Adamson2db134e2009-04-03 08:27:55 +03003933 struct nfsd4_exchange_id *exid)
3934{
J. Bruce Fieldsd0a381d2014-01-30 17:18:38 -05003935 struct xdr_stream *xdr = &resp->xdr;
J. Bruce Fieldsbc749ca2009-04-07 16:55:27 -07003936 __be32 *p;
Andy Adamson0733d212009-04-03 08:28:01 +03003937 char *major_id;
3938 char *server_scope;
3939 int major_id_sz;
3940 int server_scope_sz;
3941 uint64_t minor_id = 0;
3942
Andy Adamson0733d212009-04-03 08:28:01 +03003943 major_id = utsname()->nodename;
3944 major_id_sz = strlen(major_id);
3945 server_scope = utsname()->nodename;
3946 server_scope_sz = strlen(server_scope);
3947
J. Bruce Fieldsd0a381d2014-01-30 17:18:38 -05003948 p = xdr_reserve_space(xdr,
Andy Adamson0733d212009-04-03 08:28:01 +03003949 8 /* eir_clientid */ +
3950 4 /* eir_sequenceid */ +
3951 4 /* eir_flags */ +
Kinglong Meea8bb84b2013-12-10 15:24:36 +08003952 4 /* spr_how */);
J. Bruce Fieldsd0a381d2014-01-30 17:18:38 -05003953 if (!p)
3954 return nfserr_resource;
Andy Adamson0733d212009-04-03 08:28:01 +03003955
J. Bruce Fields0c0c2672014-03-22 18:43:16 -04003956 p = xdr_encode_opaque_fixed(p, &exid->clientid, 8);
J. Bruce Fieldsc373b0a2014-03-22 17:09:18 -04003957 *p++ = cpu_to_be32(exid->seqid);
3958 *p++ = cpu_to_be32(exid->flags);
Andy Adamson0733d212009-04-03 08:28:01 +03003959
J. Bruce Fieldsc373b0a2014-03-22 17:09:18 -04003960 *p++ = cpu_to_be32(exid->spa_how);
Kinglong Meea8bb84b2013-12-10 15:24:36 +08003961
J. Bruce Fields57266a62013-04-13 14:27:29 -04003962 switch (exid->spa_how) {
3963 case SP4_NONE:
3964 break;
3965 case SP4_MACH_CRED:
3966 /* spo_must_enforce bitmap: */
J. Bruce Fieldsbac966d2017-05-06 11:12:04 -04003967 nfserr = nfsd4_encode_bitmap(xdr,
Andrew Elbleed941642016-06-15 12:52:09 -04003968 exid->spo_must_enforce[0],
3969 exid->spo_must_enforce[1],
3970 exid->spo_must_enforce[2]);
J. Bruce Fieldsbac966d2017-05-06 11:12:04 -04003971 if (nfserr)
3972 return nfserr;
Andrew Elbleed941642016-06-15 12:52:09 -04003973 /* spo_must_allow bitmap: */
J. Bruce Fieldsbac966d2017-05-06 11:12:04 -04003974 nfserr = nfsd4_encode_bitmap(xdr,
Andrew Elbleed941642016-06-15 12:52:09 -04003975 exid->spo_must_allow[0],
3976 exid->spo_must_allow[1],
3977 exid->spo_must_allow[2]);
J. Bruce Fieldsbac966d2017-05-06 11:12:04 -04003978 if (nfserr)
3979 return nfserr;
J. Bruce Fields57266a62013-04-13 14:27:29 -04003980 break;
3981 default:
3982 WARN_ON_ONCE(1);
3983 }
Andy Adamson0733d212009-04-03 08:28:01 +03003984
J. Bruce Fieldsd0a381d2014-01-30 17:18:38 -05003985 p = xdr_reserve_space(xdr,
Kinglong Meea8bb84b2013-12-10 15:24:36 +08003986 8 /* so_minor_id */ +
3987 4 /* so_major_id.len */ +
3988 (XDR_QUADLEN(major_id_sz) * 4) +
3989 4 /* eir_server_scope.len */ +
3990 (XDR_QUADLEN(server_scope_sz) * 4) +
3991 4 /* eir_server_impl_id.count (0) */);
J. Bruce Fieldsd0a381d2014-01-30 17:18:38 -05003992 if (!p)
3993 return nfserr_resource;
Kinglong Meea8bb84b2013-12-10 15:24:36 +08003994
Andy Adamson0733d212009-04-03 08:28:01 +03003995 /* The server_owner struct */
J. Bruce Fieldsb64c7f32014-03-22 17:11:35 -04003996 p = xdr_encode_hyper(p, minor_id); /* Minor id */
Andy Adamson0733d212009-04-03 08:28:01 +03003997 /* major id */
J. Bruce Fields0c0c2672014-03-22 18:43:16 -04003998 p = xdr_encode_opaque(p, major_id, major_id_sz);
Andy Adamson0733d212009-04-03 08:28:01 +03003999
4000 /* Server scope */
J. Bruce Fields0c0c2672014-03-22 18:43:16 -04004001 p = xdr_encode_opaque(p, server_scope, server_scope_sz);
Andy Adamson0733d212009-04-03 08:28:01 +03004002
4003 /* Implementation id */
J. Bruce Fieldsc373b0a2014-03-22 17:09:18 -04004004 *p++ = cpu_to_be32(0); /* zero length nfs_impl_id4 array */
Andy Adamson0733d212009-04-03 08:28:01 +03004005 return 0;
Andy Adamson2db134e2009-04-03 08:27:55 +03004006}
4007
4008static __be32
J. Bruce Fields57b7b432012-04-25 17:58:50 -04004009nfsd4_encode_create_session(struct nfsd4_compoundres *resp, __be32 nfserr,
Andy Adamson2db134e2009-04-03 08:27:55 +03004010 struct nfsd4_create_session *sess)
4011{
J. Bruce Fieldsd0a381d2014-01-30 17:18:38 -05004012 struct xdr_stream *xdr = &resp->xdr;
J. Bruce Fieldsbc749ca2009-04-07 16:55:27 -07004013 __be32 *p;
Andy Adamsonec6b5d72009-04-03 08:28:28 +03004014
J. Bruce Fieldsd0a381d2014-01-30 17:18:38 -05004015 p = xdr_reserve_space(xdr, 24);
4016 if (!p)
4017 return nfserr_resource;
J. Bruce Fields0c0c2672014-03-22 18:43:16 -04004018 p = xdr_encode_opaque_fixed(p, sess->sessionid.data,
4019 NFS4_MAX_SESSIONID_LEN);
J. Bruce Fieldsc373b0a2014-03-22 17:09:18 -04004020 *p++ = cpu_to_be32(sess->seqid);
4021 *p++ = cpu_to_be32(sess->flags);
Andy Adamsonec6b5d72009-04-03 08:28:28 +03004022
J. Bruce Fieldsd0a381d2014-01-30 17:18:38 -05004023 p = xdr_reserve_space(xdr, 28);
4024 if (!p)
4025 return nfserr_resource;
J. Bruce Fieldsc373b0a2014-03-22 17:09:18 -04004026 *p++ = cpu_to_be32(0); /* headerpadsz */
4027 *p++ = cpu_to_be32(sess->fore_channel.maxreq_sz);
4028 *p++ = cpu_to_be32(sess->fore_channel.maxresp_sz);
4029 *p++ = cpu_to_be32(sess->fore_channel.maxresp_cached);
4030 *p++ = cpu_to_be32(sess->fore_channel.maxops);
4031 *p++ = cpu_to_be32(sess->fore_channel.maxreqs);
4032 *p++ = cpu_to_be32(sess->fore_channel.nr_rdma_attrs);
Andy Adamsonec6b5d72009-04-03 08:28:28 +03004033
4034 if (sess->fore_channel.nr_rdma_attrs) {
J. Bruce Fieldsd0a381d2014-01-30 17:18:38 -05004035 p = xdr_reserve_space(xdr, 4);
4036 if (!p)
4037 return nfserr_resource;
J. Bruce Fieldsc373b0a2014-03-22 17:09:18 -04004038 *p++ = cpu_to_be32(sess->fore_channel.rdma_attrs);
Andy Adamsonec6b5d72009-04-03 08:28:28 +03004039 }
4040
J. Bruce Fieldsd0a381d2014-01-30 17:18:38 -05004041 p = xdr_reserve_space(xdr, 28);
4042 if (!p)
4043 return nfserr_resource;
J. Bruce Fieldsc373b0a2014-03-22 17:09:18 -04004044 *p++ = cpu_to_be32(0); /* headerpadsz */
4045 *p++ = cpu_to_be32(sess->back_channel.maxreq_sz);
4046 *p++ = cpu_to_be32(sess->back_channel.maxresp_sz);
4047 *p++ = cpu_to_be32(sess->back_channel.maxresp_cached);
4048 *p++ = cpu_to_be32(sess->back_channel.maxops);
4049 *p++ = cpu_to_be32(sess->back_channel.maxreqs);
4050 *p++ = cpu_to_be32(sess->back_channel.nr_rdma_attrs);
Andy Adamsonec6b5d72009-04-03 08:28:28 +03004051
4052 if (sess->back_channel.nr_rdma_attrs) {
J. Bruce Fieldsd0a381d2014-01-30 17:18:38 -05004053 p = xdr_reserve_space(xdr, 4);
4054 if (!p)
4055 return nfserr_resource;
J. Bruce Fieldsc373b0a2014-03-22 17:09:18 -04004056 *p++ = cpu_to_be32(sess->back_channel.rdma_attrs);
Andy Adamsonec6b5d72009-04-03 08:28:28 +03004057 }
4058 return 0;
Andy Adamson2db134e2009-04-03 08:27:55 +03004059}
4060
4061static __be32
J. Bruce Fields57b7b432012-04-25 17:58:50 -04004062nfsd4_encode_sequence(struct nfsd4_compoundres *resp, __be32 nfserr,
Andy Adamson2db134e2009-04-03 08:27:55 +03004063 struct nfsd4_sequence *seq)
4064{
J. Bruce Fieldsd0a381d2014-01-30 17:18:38 -05004065 struct xdr_stream *xdr = &resp->xdr;
J. Bruce Fieldsbc749ca2009-04-07 16:55:27 -07004066 __be32 *p;
Benny Halevyb85d4c02009-04-03 08:28:08 +03004067
J. Bruce Fieldsd0a381d2014-01-30 17:18:38 -05004068 p = xdr_reserve_space(xdr, NFS4_MAX_SESSIONID_LEN + 20);
4069 if (!p)
4070 return nfserr_resource;
J. Bruce Fields0c0c2672014-03-22 18:43:16 -04004071 p = xdr_encode_opaque_fixed(p, seq->sessionid.data,
4072 NFS4_MAX_SESSIONID_LEN);
J. Bruce Fieldsc373b0a2014-03-22 17:09:18 -04004073 *p++ = cpu_to_be32(seq->seqid);
4074 *p++ = cpu_to_be32(seq->slotid);
J. Bruce Fieldsb7d7ca32011-08-31 15:39:30 -04004075 /* Note slotid's are numbered from zero: */
J. Bruce Fieldsc373b0a2014-03-22 17:09:18 -04004076 *p++ = cpu_to_be32(seq->maxslots - 1); /* sr_highest_slotid */
4077 *p++ = cpu_to_be32(seq->maxslots - 1); /* sr_target_highest_slotid */
4078 *p++ = cpu_to_be32(seq->status_flags);
Benny Halevyb85d4c02009-04-03 08:28:08 +03004079
J. Bruce Fieldsf5236012014-03-21 17:57:57 -04004080 resp->cstate.data_offset = xdr->buf->len; /* DRC cache data pointer */
Benny Halevyb85d4c02009-04-03 08:28:08 +03004081 return 0;
Andy Adamson2db134e2009-04-03 08:27:55 +03004082}
4083
J. Bruce Fields2355c592012-04-25 16:56:22 -04004084static __be32
J. Bruce Fields57b7b432012-04-25 17:58:50 -04004085nfsd4_encode_test_stateid(struct nfsd4_compoundres *resp, __be32 nfserr,
Bryan Schumaker17456802011-07-13 10:50:48 -04004086 struct nfsd4_test_stateid *test_stateid)
4087{
J. Bruce Fieldsd0a381d2014-01-30 17:18:38 -05004088 struct xdr_stream *xdr = &resp->xdr;
Bryan Schumaker03cfb4202012-01-27 10:22:49 -05004089 struct nfsd4_test_stateid_id *stateid, *next;
Bryan Schumaker17456802011-07-13 10:50:48 -04004090 __be32 *p;
Bryan Schumaker17456802011-07-13 10:50:48 -04004091
J. Bruce Fieldsd0a381d2014-01-30 17:18:38 -05004092 p = xdr_reserve_space(xdr, 4 + (4 * test_stateid->ts_num_ids));
4093 if (!p)
4094 return nfserr_resource;
Bryan Schumaker17456802011-07-13 10:50:48 -04004095 *p++ = htonl(test_stateid->ts_num_ids);
Bryan Schumaker17456802011-07-13 10:50:48 -04004096
Bryan Schumaker03cfb4202012-01-27 10:22:49 -05004097 list_for_each_entry_safe(stateid, next, &test_stateid->ts_stateid_list, ts_id_list) {
Al Viro02f5fde2012-04-13 00:10:34 -04004098 *p++ = stateid->ts_id_status;
Bryan Schumaker17456802011-07-13 10:50:48 -04004099 }
Bryan Schumaker17456802011-07-13 10:50:48 -04004100
J. Bruce Fieldsbac966d2017-05-06 11:12:04 -04004101 return 0;
Bryan Schumaker17456802011-07-13 10:50:48 -04004102}
4103
Christoph Hellwig9cf514c2014-05-05 13:11:59 +02004104#ifdef CONFIG_NFSD_PNFS
4105static __be32
4106nfsd4_encode_getdeviceinfo(struct nfsd4_compoundres *resp, __be32 nfserr,
4107 struct nfsd4_getdeviceinfo *gdev)
4108{
4109 struct xdr_stream *xdr = &resp->xdr;
J. Bruce Fieldsf961e3f2017-05-05 16:17:57 -04004110 const struct nfsd4_layout_ops *ops;
Christoph Hellwig9cf514c2014-05-05 13:11:59 +02004111 u32 starting_len = xdr->buf->len, needed_len;
4112 __be32 *p;
4113
Christoph Hellwig9cf514c2014-05-05 13:11:59 +02004114 p = xdr_reserve_space(xdr, 4);
4115 if (!p)
J. Bruce Fieldsbac966d2017-05-06 11:12:04 -04004116 return nfserr_resource;
Christoph Hellwig9cf514c2014-05-05 13:11:59 +02004117
4118 *p++ = cpu_to_be32(gdev->gd_layout_type);
4119
4120 /* If maxcount is 0 then just update notifications */
4121 if (gdev->gd_maxcount != 0) {
J. Bruce Fieldsf961e3f2017-05-05 16:17:57 -04004122 ops = nfsd4_layout_ops[gdev->gd_layout_type];
Christoph Hellwig9cf514c2014-05-05 13:11:59 +02004123 nfserr = ops->encode_getdeviceinfo(xdr, gdev);
4124 if (nfserr) {
4125 /*
4126 * We don't bother to burden the layout drivers with
4127 * enforcing gd_maxcount, just tell the client to
4128 * come back with a bigger buffer if it's not enough.
4129 */
4130 if (xdr->buf->len + 4 > gdev->gd_maxcount)
4131 goto toosmall;
J. Bruce Fieldsbac966d2017-05-06 11:12:04 -04004132 return nfserr;
Christoph Hellwig9cf514c2014-05-05 13:11:59 +02004133 }
4134 }
4135
Christoph Hellwig9cf514c2014-05-05 13:11:59 +02004136 if (gdev->gd_notify_types) {
4137 p = xdr_reserve_space(xdr, 4 + 4);
4138 if (!p)
J. Bruce Fieldsbac966d2017-05-06 11:12:04 -04004139 return nfserr_resource;
Christoph Hellwig9cf514c2014-05-05 13:11:59 +02004140 *p++ = cpu_to_be32(1); /* bitmap length */
4141 *p++ = cpu_to_be32(gdev->gd_notify_types);
4142 } else {
4143 p = xdr_reserve_space(xdr, 4);
4144 if (!p)
J. Bruce Fieldsbac966d2017-05-06 11:12:04 -04004145 return nfserr_resource;
Christoph Hellwig9cf514c2014-05-05 13:11:59 +02004146 *p++ = 0;
4147 }
4148
J. Bruce Fieldsbac966d2017-05-06 11:12:04 -04004149 return 0;
Christoph Hellwig9cf514c2014-05-05 13:11:59 +02004150toosmall:
4151 dprintk("%s: maxcount too small\n", __func__);
4152 needed_len = xdr->buf->len + 4 /* notifications */;
4153 xdr_truncate_encode(xdr, starting_len);
4154 p = xdr_reserve_space(xdr, 4);
J. Bruce Fieldsbac966d2017-05-06 11:12:04 -04004155 if (!p)
4156 return nfserr_resource;
4157 *p++ = cpu_to_be32(needed_len);
4158 return nfserr_toosmall;
Christoph Hellwig9cf514c2014-05-05 13:11:59 +02004159}
4160
4161static __be32
4162nfsd4_encode_layoutget(struct nfsd4_compoundres *resp, __be32 nfserr,
4163 struct nfsd4_layoutget *lgp)
4164{
4165 struct xdr_stream *xdr = &resp->xdr;
J. Bruce Fieldsf961e3f2017-05-05 16:17:57 -04004166 const struct nfsd4_layout_ops *ops;
Christoph Hellwig9cf514c2014-05-05 13:11:59 +02004167 __be32 *p;
4168
Christoph Hellwig9cf514c2014-05-05 13:11:59 +02004169 p = xdr_reserve_space(xdr, 36 + sizeof(stateid_opaque_t));
4170 if (!p)
J. Bruce Fieldsbac966d2017-05-06 11:12:04 -04004171 return nfserr_resource;
Christoph Hellwig9cf514c2014-05-05 13:11:59 +02004172
4173 *p++ = cpu_to_be32(1); /* we always set return-on-close */
4174 *p++ = cpu_to_be32(lgp->lg_sid.si_generation);
4175 p = xdr_encode_opaque_fixed(p, &lgp->lg_sid.si_opaque,
4176 sizeof(stateid_opaque_t));
4177
4178 *p++ = cpu_to_be32(1); /* we always return a single layout */
4179 p = xdr_encode_hyper(p, lgp->lg_seg.offset);
4180 p = xdr_encode_hyper(p, lgp->lg_seg.length);
4181 *p++ = cpu_to_be32(lgp->lg_seg.iomode);
4182 *p++ = cpu_to_be32(lgp->lg_layout_type);
4183
J. Bruce Fieldsf961e3f2017-05-05 16:17:57 -04004184 ops = nfsd4_layout_ops[lgp->lg_layout_type];
J. Bruce Fieldsbac966d2017-05-06 11:12:04 -04004185 return ops->encode_layoutget(xdr, lgp);
Christoph Hellwig9cf514c2014-05-05 13:11:59 +02004186}
4187
4188static __be32
4189nfsd4_encode_layoutcommit(struct nfsd4_compoundres *resp, __be32 nfserr,
4190 struct nfsd4_layoutcommit *lcp)
4191{
4192 struct xdr_stream *xdr = &resp->xdr;
4193 __be32 *p;
4194
Christoph Hellwig9cf514c2014-05-05 13:11:59 +02004195 p = xdr_reserve_space(xdr, 4);
4196 if (!p)
4197 return nfserr_resource;
4198 *p++ = cpu_to_be32(lcp->lc_size_chg);
4199 if (lcp->lc_size_chg) {
4200 p = xdr_reserve_space(xdr, 8);
4201 if (!p)
4202 return nfserr_resource;
4203 p = xdr_encode_hyper(p, lcp->lc_newsize);
4204 }
4205
J. Bruce Fieldsbac966d2017-05-06 11:12:04 -04004206 return 0;
Christoph Hellwig9cf514c2014-05-05 13:11:59 +02004207}
4208
4209static __be32
4210nfsd4_encode_layoutreturn(struct nfsd4_compoundres *resp, __be32 nfserr,
4211 struct nfsd4_layoutreturn *lrp)
4212{
4213 struct xdr_stream *xdr = &resp->xdr;
4214 __be32 *p;
4215
Christoph Hellwig9cf514c2014-05-05 13:11:59 +02004216 p = xdr_reserve_space(xdr, 4);
4217 if (!p)
4218 return nfserr_resource;
4219 *p++ = cpu_to_be32(lrp->lrs_present);
4220 if (lrp->lrs_present)
Kinglong Mee376675d2015-03-22 22:17:10 +08004221 return nfsd4_encode_stateid(xdr, &lrp->lr_sid);
J. Bruce Fieldsbac966d2017-05-06 11:12:04 -04004222 return 0;
Christoph Hellwig9cf514c2014-05-05 13:11:59 +02004223}
4224#endif /* CONFIG_NFSD_PNFS */
4225
Andy Adamson2db134e2009-04-03 08:27:55 +03004226static __be32
Anna Schumaker29ae7f92016-09-07 15:57:30 -04004227nfsd42_encode_write_res(struct nfsd4_compoundres *resp, struct nfsd42_write_res *write)
4228{
4229 __be32 *p;
4230
4231 p = xdr_reserve_space(&resp->xdr, 4 + 8 + 4 + NFS4_VERIFIER_SIZE);
4232 if (!p)
4233 return nfserr_resource;
4234
4235 *p++ = cpu_to_be32(0);
4236 p = xdr_encode_hyper(p, write->wr_bytes_written);
4237 *p++ = cpu_to_be32(write->wr_stable_how);
4238 p = xdr_encode_opaque_fixed(p, write->wr_verifier.data,
4239 NFS4_VERIFIER_SIZE);
4240 return nfs_ok;
4241}
4242
4243static __be32
4244nfsd4_encode_copy(struct nfsd4_compoundres *resp, __be32 nfserr,
4245 struct nfsd4_copy *copy)
4246{
4247 __be32 *p;
4248
J. Bruce Fieldsbac966d2017-05-06 11:12:04 -04004249 nfserr = nfsd42_encode_write_res(resp, &copy->cp_res);
4250 if (nfserr)
4251 return nfserr;
Anna Schumaker29ae7f92016-09-07 15:57:30 -04004252
J. Bruce Fieldsbac966d2017-05-06 11:12:04 -04004253 p = xdr_reserve_space(&resp->xdr, 4 + 4);
J. Bruce Fieldsedcc8452018-03-07 15:37:35 -05004254 *p++ = xdr_one; /* cr_consecutive */
J. Bruce Fieldsbac966d2017-05-06 11:12:04 -04004255 *p++ = cpu_to_be32(copy->cp_synchronous);
4256 return 0;
Anna Schumaker29ae7f92016-09-07 15:57:30 -04004257}
4258
4259static __be32
Anna Schumaker24bab492014-09-26 13:58:27 -04004260nfsd4_encode_seek(struct nfsd4_compoundres *resp, __be32 nfserr,
4261 struct nfsd4_seek *seek)
4262{
4263 __be32 *p;
4264
Anna Schumaker24bab492014-09-26 13:58:27 -04004265 p = xdr_reserve_space(&resp->xdr, 4 + 8);
4266 *p++ = cpu_to_be32(seek->seek_eof);
4267 p = xdr_encode_hyper(p, seek->seek_pos);
4268
J. Bruce Fieldsbac966d2017-05-06 11:12:04 -04004269 return 0;
Anna Schumaker24bab492014-09-26 13:58:27 -04004270}
4271
4272static __be32
Benny Halevy695e12f2008-07-04 14:38:33 +03004273nfsd4_encode_noop(struct nfsd4_compoundres *resp, __be32 nfserr, void *p)
4274{
4275 return nfserr;
4276}
4277
4278typedef __be32(* nfsd4_enc)(struct nfsd4_compoundres *, __be32, void *);
4279
Andy Adamson2db134e2009-04-03 08:27:55 +03004280/*
4281 * Note: nfsd4_enc_ops vector is shared for v4.0 and v4.1
4282 * since we don't need to filter out obsolete ops as this is
4283 * done in the decoding phase.
4284 */
Chuck Leverc1df6092017-08-01 11:59:58 -04004285static const nfsd4_enc nfsd4_enc_ops[] = {
J. Bruce Fieldsad1060c2008-07-18 15:04:16 -04004286 [OP_ACCESS] = (nfsd4_enc)nfsd4_encode_access,
4287 [OP_CLOSE] = (nfsd4_enc)nfsd4_encode_close,
4288 [OP_COMMIT] = (nfsd4_enc)nfsd4_encode_commit,
4289 [OP_CREATE] = (nfsd4_enc)nfsd4_encode_create,
4290 [OP_DELEGPURGE] = (nfsd4_enc)nfsd4_encode_noop,
4291 [OP_DELEGRETURN] = (nfsd4_enc)nfsd4_encode_noop,
4292 [OP_GETATTR] = (nfsd4_enc)nfsd4_encode_getattr,
4293 [OP_GETFH] = (nfsd4_enc)nfsd4_encode_getfh,
4294 [OP_LINK] = (nfsd4_enc)nfsd4_encode_link,
4295 [OP_LOCK] = (nfsd4_enc)nfsd4_encode_lock,
4296 [OP_LOCKT] = (nfsd4_enc)nfsd4_encode_lockt,
4297 [OP_LOCKU] = (nfsd4_enc)nfsd4_encode_locku,
4298 [OP_LOOKUP] = (nfsd4_enc)nfsd4_encode_noop,
4299 [OP_LOOKUPP] = (nfsd4_enc)nfsd4_encode_noop,
4300 [OP_NVERIFY] = (nfsd4_enc)nfsd4_encode_noop,
4301 [OP_OPEN] = (nfsd4_enc)nfsd4_encode_open,
Benny Halevy84f09f42009-03-04 23:05:35 +02004302 [OP_OPENATTR] = (nfsd4_enc)nfsd4_encode_noop,
J. Bruce Fieldsad1060c2008-07-18 15:04:16 -04004303 [OP_OPEN_CONFIRM] = (nfsd4_enc)nfsd4_encode_open_confirm,
4304 [OP_OPEN_DOWNGRADE] = (nfsd4_enc)nfsd4_encode_open_downgrade,
4305 [OP_PUTFH] = (nfsd4_enc)nfsd4_encode_noop,
4306 [OP_PUTPUBFH] = (nfsd4_enc)nfsd4_encode_noop,
4307 [OP_PUTROOTFH] = (nfsd4_enc)nfsd4_encode_noop,
4308 [OP_READ] = (nfsd4_enc)nfsd4_encode_read,
4309 [OP_READDIR] = (nfsd4_enc)nfsd4_encode_readdir,
4310 [OP_READLINK] = (nfsd4_enc)nfsd4_encode_readlink,
4311 [OP_REMOVE] = (nfsd4_enc)nfsd4_encode_remove,
4312 [OP_RENAME] = (nfsd4_enc)nfsd4_encode_rename,
4313 [OP_RENEW] = (nfsd4_enc)nfsd4_encode_noop,
4314 [OP_RESTOREFH] = (nfsd4_enc)nfsd4_encode_noop,
4315 [OP_SAVEFH] = (nfsd4_enc)nfsd4_encode_noop,
4316 [OP_SECINFO] = (nfsd4_enc)nfsd4_encode_secinfo,
4317 [OP_SETATTR] = (nfsd4_enc)nfsd4_encode_setattr,
4318 [OP_SETCLIENTID] = (nfsd4_enc)nfsd4_encode_setclientid,
4319 [OP_SETCLIENTID_CONFIRM] = (nfsd4_enc)nfsd4_encode_noop,
4320 [OP_VERIFY] = (nfsd4_enc)nfsd4_encode_noop,
4321 [OP_WRITE] = (nfsd4_enc)nfsd4_encode_write,
4322 [OP_RELEASE_LOCKOWNER] = (nfsd4_enc)nfsd4_encode_noop,
Andy Adamson2db134e2009-04-03 08:27:55 +03004323
4324 /* NFSv4.1 operations */
4325 [OP_BACKCHANNEL_CTL] = (nfsd4_enc)nfsd4_encode_noop,
J. Bruce Fields1d1bc8f2010-10-04 23:12:59 -04004326 [OP_BIND_CONN_TO_SESSION] = (nfsd4_enc)nfsd4_encode_bind_conn_to_session,
Andy Adamson2db134e2009-04-03 08:27:55 +03004327 [OP_EXCHANGE_ID] = (nfsd4_enc)nfsd4_encode_exchange_id,
4328 [OP_CREATE_SESSION] = (nfsd4_enc)nfsd4_encode_create_session,
Kinglong Mee43212cc2013-12-09 19:04:23 +08004329 [OP_DESTROY_SESSION] = (nfsd4_enc)nfsd4_encode_noop,
4330 [OP_FREE_STATEID] = (nfsd4_enc)nfsd4_encode_noop,
Andy Adamson2db134e2009-04-03 08:27:55 +03004331 [OP_GET_DIR_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop,
Christoph Hellwig9cf514c2014-05-05 13:11:59 +02004332#ifdef CONFIG_NFSD_PNFS
4333 [OP_GETDEVICEINFO] = (nfsd4_enc)nfsd4_encode_getdeviceinfo,
4334 [OP_GETDEVICELIST] = (nfsd4_enc)nfsd4_encode_noop,
4335 [OP_LAYOUTCOMMIT] = (nfsd4_enc)nfsd4_encode_layoutcommit,
4336 [OP_LAYOUTGET] = (nfsd4_enc)nfsd4_encode_layoutget,
4337 [OP_LAYOUTRETURN] = (nfsd4_enc)nfsd4_encode_layoutreturn,
4338#else
Andy Adamson2db134e2009-04-03 08:27:55 +03004339 [OP_GETDEVICEINFO] = (nfsd4_enc)nfsd4_encode_noop,
4340 [OP_GETDEVICELIST] = (nfsd4_enc)nfsd4_encode_noop,
4341 [OP_LAYOUTCOMMIT] = (nfsd4_enc)nfsd4_encode_noop,
4342 [OP_LAYOUTGET] = (nfsd4_enc)nfsd4_encode_noop,
4343 [OP_LAYOUTRETURN] = (nfsd4_enc)nfsd4_encode_noop,
Christoph Hellwig9cf514c2014-05-05 13:11:59 +02004344#endif
Mi Jinlong22b6dee2010-12-27 14:29:57 +08004345 [OP_SECINFO_NO_NAME] = (nfsd4_enc)nfsd4_encode_secinfo_no_name,
Andy Adamson2db134e2009-04-03 08:27:55 +03004346 [OP_SEQUENCE] = (nfsd4_enc)nfsd4_encode_sequence,
4347 [OP_SET_SSV] = (nfsd4_enc)nfsd4_encode_noop,
Bryan Schumaker17456802011-07-13 10:50:48 -04004348 [OP_TEST_STATEID] = (nfsd4_enc)nfsd4_encode_test_stateid,
Andy Adamson2db134e2009-04-03 08:27:55 +03004349 [OP_WANT_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop,
4350 [OP_DESTROY_CLIENTID] = (nfsd4_enc)nfsd4_encode_noop,
4351 [OP_RECLAIM_COMPLETE] = (nfsd4_enc)nfsd4_encode_noop,
Anna Schumaker87a15a82014-09-26 13:58:26 -04004352
4353 /* NFSv4.2 operations */
4354 [OP_ALLOCATE] = (nfsd4_enc)nfsd4_encode_noop,
Anna Schumaker29ae7f92016-09-07 15:57:30 -04004355 [OP_COPY] = (nfsd4_enc)nfsd4_encode_copy,
Anna Schumaker87a15a82014-09-26 13:58:26 -04004356 [OP_COPY_NOTIFY] = (nfsd4_enc)nfsd4_encode_noop,
4357 [OP_DEALLOCATE] = (nfsd4_enc)nfsd4_encode_noop,
4358 [OP_IO_ADVISE] = (nfsd4_enc)nfsd4_encode_noop,
4359 [OP_LAYOUTERROR] = (nfsd4_enc)nfsd4_encode_noop,
4360 [OP_LAYOUTSTATS] = (nfsd4_enc)nfsd4_encode_noop,
4361 [OP_OFFLOAD_CANCEL] = (nfsd4_enc)nfsd4_encode_noop,
4362 [OP_OFFLOAD_STATUS] = (nfsd4_enc)nfsd4_encode_noop,
4363 [OP_READ_PLUS] = (nfsd4_enc)nfsd4_encode_noop,
Anna Schumaker24bab492014-09-26 13:58:27 -04004364 [OP_SEEK] = (nfsd4_enc)nfsd4_encode_seek,
Anna Schumaker87a15a82014-09-26 13:58:26 -04004365 [OP_WRITE_SAME] = (nfsd4_enc)nfsd4_encode_noop,
Christoph Hellwigffa01602015-12-03 12:59:52 +01004366 [OP_CLONE] = (nfsd4_enc)nfsd4_encode_noop,
Benny Halevy695e12f2008-07-04 14:38:33 +03004367};
4368
Andy Adamson496c2622009-04-03 08:28:48 +03004369/*
J. Bruce Fieldsa8095f72014-03-11 17:54:34 -04004370 * Calculate whether we still have space to encode repsize bytes.
4371 * There are two considerations:
4372 * - For NFS versions >=4.1, the size of the reply must stay within
4373 * session limits
4374 * - For all NFS versions, we must stay within limited preallocated
4375 * buffer space.
Andy Adamson496c2622009-04-03 08:28:48 +03004376 *
J. Bruce Fieldsa8095f72014-03-11 17:54:34 -04004377 * This is called before the operation is processed, so can only provide
4378 * an upper estimate. For some nonidempotent operations (such as
4379 * getattr), it's not necessarily a problem if that estimate is wrong,
4380 * as we can fail it after processing without significant side effects.
Andy Adamson496c2622009-04-03 08:28:48 +03004381 */
J. Bruce Fieldsa8095f72014-03-11 17:54:34 -04004382__be32 nfsd4_check_resp_size(struct nfsd4_compoundres *resp, u32 respsize)
Andy Adamson496c2622009-04-03 08:28:48 +03004383{
J. Bruce Fields67492c92014-03-08 16:42:05 -05004384 struct xdr_buf *buf = &resp->rqstp->rq_res;
J. Bruce Fields47ee5292014-03-12 21:39:35 -04004385 struct nfsd4_slot *slot = resp->cstate.slot;
Andy Adamson496c2622009-04-03 08:28:48 +03004386
J. Bruce Fields47ee5292014-03-12 21:39:35 -04004387 if (buf->len + respsize <= buf->buflen)
4388 return nfs_ok;
4389 if (!nfsd4_has_session(&resp->cstate))
J. Bruce Fieldsea8d7722014-03-08 17:19:55 -05004390 return nfserr_resource;
J. Bruce Fields47ee5292014-03-12 21:39:35 -04004391 if (slot->sl_flags & NFSD4_SLOT_CACHETHIS) {
4392 WARN_ON_ONCE(1);
4393 return nfserr_rep_too_big_to_cache;
J. Bruce Fieldsea8d7722014-03-08 17:19:55 -05004394 }
J. Bruce Fields47ee5292014-03-12 21:39:35 -04004395 return nfserr_rep_too_big;
Andy Adamson496c2622009-04-03 08:28:48 +03004396}
4397
Linus Torvalds1da177e2005-04-16 15:20:36 -07004398void
4399nfsd4_encode_operation(struct nfsd4_compoundres *resp, struct nfsd4_op *op)
4400{
J. Bruce Fields082d4bd2013-08-29 15:42:52 -04004401 struct xdr_stream *xdr = &resp->xdr;
J. Bruce Fields9411b1d2013-04-01 16:37:12 -04004402 struct nfs4_stateowner *so = resp->cstate.replay_owner;
J. Bruce Fields5f4ab942014-03-07 11:01:37 -05004403 struct svc_rqst *rqstp = resp->rqstp;
J. Bruce Fields34b1744c2017-05-05 17:09:37 -04004404 const struct nfsd4_operation *opdesc = op->opdesc;
J. Bruce Fields082d4bd2013-08-29 15:42:52 -04004405 int post_err_offset;
J. Bruce Fields07d1f802014-03-06 20:39:29 -05004406 nfsd4_enc encoder;
J. Bruce Fieldsbc749ca2009-04-07 16:55:27 -07004407 __be32 *p;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004408
J. Bruce Fieldsd0a381d2014-01-30 17:18:38 -05004409 p = xdr_reserve_space(xdr, 8);
4410 if (!p) {
4411 WARN_ON_ONCE(1);
4412 return;
4413 }
J. Bruce Fieldsc373b0a2014-03-22 17:09:18 -04004414 *p++ = cpu_to_be32(op->opnum);
J. Bruce Fields082d4bd2013-08-29 15:42:52 -04004415 post_err_offset = xdr->buf->len;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004416
Benny Halevy695e12f2008-07-04 14:38:33 +03004417 if (op->opnum == OP_ILLEGAL)
4418 goto status;
J. Bruce Fieldsb7571e42017-05-06 10:49:21 -04004419 if (op->status && opdesc &&
4420 !(opdesc->op_flags & OP_NONTRIVIAL_ERROR_ENCODE))
4421 goto status;
Benny Halevy695e12f2008-07-04 14:38:33 +03004422 BUG_ON(op->opnum < 0 || op->opnum >= ARRAY_SIZE(nfsd4_enc_ops) ||
4423 !nfsd4_enc_ops[op->opnum]);
J. Bruce Fields07d1f802014-03-06 20:39:29 -05004424 encoder = nfsd4_enc_ops[op->opnum];
4425 op->status = encoder(resp, op->status, &op->u);
J. Bruce Fields34b1744c2017-05-05 17:09:37 -04004426 if (opdesc && opdesc->op_release)
4427 opdesc->op_release(&op->u);
J. Bruce Fields2825a7f2013-08-26 16:04:46 -04004428 xdr_commit_encode(xdr);
4429
J. Bruce Fields067e1ac2014-03-21 17:26:44 -04004430 /* nfsd4_check_resp_size guarantees enough room for error status */
J. Bruce Fields5f4ab942014-03-07 11:01:37 -05004431 if (!op->status) {
4432 int space_needed = 0;
4433 if (!nfsd4_last_compound_op(rqstp))
4434 space_needed = COMPOUND_ERR_SLACK_SPACE;
4435 op->status = nfsd4_check_resp_size(resp, space_needed);
4436 }
J. Bruce Fieldsc8f13d92014-05-08 17:38:18 -04004437 if (op->status == nfserr_resource && nfsd4_has_session(&resp->cstate)) {
4438 struct nfsd4_slot *slot = resp->cstate.slot;
4439
4440 if (slot->sl_flags & NFSD4_SLOT_CACHETHIS)
4441 op->status = nfserr_rep_too_big_to_cache;
4442 else
4443 op->status = nfserr_rep_too_big;
4444 }
J. Bruce Fields07d1f802014-03-06 20:39:29 -05004445 if (op->status == nfserr_resource ||
4446 op->status == nfserr_rep_too_big ||
4447 op->status == nfserr_rep_too_big_to_cache) {
4448 /*
4449 * The operation may have already been encoded or
4450 * partially encoded. No op returns anything additional
4451 * in the case of one of these three errors, so we can
4452 * just truncate back to after the status. But it's a
4453 * bug if we had to do this on a non-idempotent op:
4454 */
4455 warn_on_nonidempotent_op(op);
J. Bruce Fields082d4bd2013-08-29 15:42:52 -04004456 xdr_truncate_encode(xdr, post_err_offset);
J. Bruce Fields07d1f802014-03-06 20:39:29 -05004457 }
J. Bruce Fields9411b1d2013-04-01 16:37:12 -04004458 if (so) {
J. Bruce Fields082d4bd2013-08-29 15:42:52 -04004459 int len = xdr->buf->len - post_err_offset;
4460
J. Bruce Fields9411b1d2013-04-01 16:37:12 -04004461 so->so_replay.rp_status = op->status;
J. Bruce Fields082d4bd2013-08-29 15:42:52 -04004462 so->so_replay.rp_buflen = len;
4463 read_bytes_from_xdr_buf(xdr->buf, post_err_offset,
4464 so->so_replay.rp_buf, len);
J. Bruce Fields9411b1d2013-04-01 16:37:12 -04004465 }
Benny Halevy695e12f2008-07-04 14:38:33 +03004466status:
J. Bruce Fields082d4bd2013-08-29 15:42:52 -04004467 /* Note that op->status is already in network byte order: */
4468 write_bytes_to_xdr_buf(xdr->buf, post_err_offset - 4, &op->status, 4);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004469}
4470
4471/*
4472 * Encode the reply stored in the stateowner reply cache
4473 *
4474 * XDR note: do not encode rp->rp_buflen: the buffer contains the
4475 * previously sent already encoded operation.
Linus Torvalds1da177e2005-04-16 15:20:36 -07004476 */
4477void
J. Bruce Fieldsd0a381d2014-01-30 17:18:38 -05004478nfsd4_encode_replay(struct xdr_stream *xdr, struct nfsd4_op *op)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004479{
J. Bruce Fieldsbc749ca2009-04-07 16:55:27 -07004480 __be32 *p;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004481 struct nfs4_replay *rp = op->replay;
4482
4483 BUG_ON(!rp);
4484
J. Bruce Fieldsd0a381d2014-01-30 17:18:38 -05004485 p = xdr_reserve_space(xdr, 8 + rp->rp_buflen);
4486 if (!p) {
4487 WARN_ON_ONCE(1);
4488 return;
4489 }
J. Bruce Fieldsc373b0a2014-03-22 17:09:18 -04004490 *p++ = cpu_to_be32(op->opnum);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004491 *p++ = rp->rp_status; /* already xdr'ed */
Linus Torvalds1da177e2005-04-16 15:20:36 -07004492
J. Bruce Fields0c0c2672014-03-22 18:43:16 -04004493 p = xdr_encode_opaque_fixed(p, rp->rp_buf, rp->rp_buflen);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004494}
4495
Linus Torvalds1da177e2005-04-16 15:20:36 -07004496int
Christoph Hellwig63f8de32017-05-08 19:42:02 +02004497nfs4svc_encode_voidres(struct svc_rqst *rqstp, __be32 *p)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004498{
4499 return xdr_ressize_check(rqstp, p);
4500}
4501
Christoph Hellwig85374882017-05-08 18:48:24 +02004502void nfsd4_release_compoundargs(struct svc_rqst *rqstp)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004503{
J. Bruce Fields3e98abf2011-07-16 17:15:10 -04004504 struct nfsd4_compoundargs *args = rqstp->rq_argp;
4505
Linus Torvalds1da177e2005-04-16 15:20:36 -07004506 if (args->ops != args->iops) {
4507 kfree(args->ops);
4508 args->ops = args->iops;
4509 }
Jesper Juhlf99d49a2005-11-07 01:01:34 -08004510 kfree(args->tmpp);
4511 args->tmpp = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004512 while (args->to_free) {
J. Bruce Fieldsd5e23382014-06-24 17:43:45 -04004513 struct svcxdr_tmpbuf *tb = args->to_free;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004514 args->to_free = tb->next;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004515 kfree(tb);
4516 }
4517}
4518
4519int
Christoph Hellwig026fec72017-05-08 19:01:48 +02004520nfs4svc_decode_compoundargs(struct svc_rqst *rqstp, __be32 *p)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004521{
Christoph Hellwig026fec72017-05-08 19:01:48 +02004522 struct nfsd4_compoundargs *args = rqstp->rq_argp;
4523
Jeff Laytone874f9f2014-03-10 11:34:55 -04004524 if (rqstp->rq_arg.head[0].iov_len % 4) {
4525 /* client is nuts */
4526 dprintk("%s: compound not properly padded! (peeraddr=%pISc xid=0x%x)",
4527 __func__, svc_addr(rqstp), be32_to_cpu(rqstp->rq_xid));
4528 return 0;
4529 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07004530 args->p = p;
4531 args->end = rqstp->rq_arg.head[0].iov_base + rqstp->rq_arg.head[0].iov_len;
4532 args->pagelist = rqstp->rq_arg.pages;
4533 args->pagelen = rqstp->rq_arg.page_len;
Chuck Levereae03e22017-08-18 11:12:27 -04004534 args->tail = false;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004535 args->tmpp = NULL;
4536 args->to_free = NULL;
4537 args->ops = args->iops;
4538 args->rqstp = rqstp;
4539
J. Bruce Fields3e98abf2011-07-16 17:15:10 -04004540 return !nfsd4_decode_compound(args);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004541}
4542
4543int
Christoph Hellwig63f8de32017-05-08 19:42:02 +02004544nfs4svc_encode_compoundres(struct svc_rqst *rqstp, __be32 *p)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004545{
4546 /*
4547 * All that remains is to write the tag and operation count...
4548 */
Christoph Hellwig63f8de32017-05-08 19:42:02 +02004549 struct nfsd4_compoundres *resp = rqstp->rq_resp;
J. Bruce Fields6ac90392014-02-26 17:39:35 -05004550 struct xdr_buf *buf = resp->xdr.buf;
4551
4552 WARN_ON_ONCE(buf->len != buf->head[0].iov_len + buf->page_len +
4553 buf->tail[0].iov_len);
J. Bruce Fieldsdd97fdd2014-02-26 17:16:27 -05004554
J. Bruce Fields2825a7f2013-08-26 16:04:46 -04004555 rqstp->rq_next_page = resp->xdr.page_ptr + 1;
4556
Linus Torvalds1da177e2005-04-16 15:20:36 -07004557 p = resp->tagp;
4558 *p++ = htonl(resp->taglen);
4559 memcpy(p, resp->tag, resp->taglen);
4560 p += XDR_QUADLEN(resp->taglen);
4561 *p++ = htonl(resp->opcnt);
4562
Trond Myklebustb6076642014-06-30 11:48:35 -04004563 nfsd4_sequence_done(resp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004564 return 1;
4565}
4566
4567/*
4568 * Local variables:
4569 * c-basic-offset: 8
4570 * End:
4571 */