blob: ee1267838719ebb274aeb18baa596844856c67e1 [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.
34 *
35 * TODO: Neil Brown made the following observation: We currently
36 * initially reserve NFSD_BUFSIZE space on the transmit queue and
37 * never release any of that until the request is complete.
38 * It would be good to calculate a new maximum response size while
39 * decoding the COMPOUND, and call svc_reserve with this number
40 * at the end of nfs4svc_decode_compoundargs.
41 */
42
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090043#include <linux/slab.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070044#include <linux/namei.h>
Boaz Harrosh341eb182009-12-03 20:29:12 +020045#include <linux/statfs.h>
Andy Adamson0733d212009-04-03 08:28:01 +030046#include <linux/utsname.h>
Bryan Schumaker17456802011-07-13 10:50:48 -040047#include <linux/pagemap.h>
J. Bruce Fields4796f452007-07-17 04:04:51 -070048#include <linux/sunrpc/svcauth_gss.h>
Boaz Harrosh9a74af22009-12-03 20:30:56 +020049
J. Bruce Fields2ca72e12011-01-04 17:37:15 -050050#include "idmap.h"
51#include "acl.h"
Boaz Harrosh9a74af22009-12-03 20:30:56 +020052#include "xdr4.h"
J. Bruce Fields0a3adad2009-11-04 18:12:35 -050053#include "vfs.h"
Bryan Schumaker17456802011-07-13 10:50:48 -040054#include "state.h"
J. Bruce Fields10910062011-01-24 12:11:02 -050055#include "cache.h"
J. Bruce Fields2ca72e12011-01-04 17:37:15 -050056
Linus Torvalds1da177e2005-04-16 15:20:36 -070057#define NFSDDBG_FACILITY NFSDDBG_XDR
58
J.Bruce Fields42ca0992006-10-04 02:16:20 -070059/*
60 * As per referral draft, the fsid for a referral MUST be different from the fsid of the containing
61 * directory in order to indicate to the client that a filesystem boundary is present
62 * We use a fixed fsid for a referral
63 */
64#define NFS4_REFERRAL_FSID_MAJOR 0x8000000ULL
65#define NFS4_REFERRAL_FSID_MINOR 0x8000000ULL
66
Al Virob37ad282006-10-19 23:28:59 -070067static __be32
68check_filename(char *str, int len, __be32 err)
Linus Torvalds1da177e2005-04-16 15:20:36 -070069{
70 int i;
71
72 if (len == 0)
73 return nfserr_inval;
74 if (isdotent(str, len))
75 return err;
76 for (i = 0; i < len; i++)
77 if (str[i] == '/')
78 return err;
79 return 0;
80}
81
Linus Torvalds1da177e2005-04-16 15:20:36 -070082#define DECODE_HEAD \
Al Viro2ebbc012006-10-19 23:28:58 -070083 __be32 *p; \
Al Virob37ad282006-10-19 23:28:59 -070084 __be32 status
Linus Torvalds1da177e2005-04-16 15:20:36 -070085#define DECODE_TAIL \
86 status = 0; \
87out: \
88 return status; \
89xdr_error: \
Chuck Lever817cb9d2007-09-11 18:01:20 -040090 dprintk("NFSD: xdr error (%s:%d)\n", \
91 __FILE__, __LINE__); \
Linus Torvalds1da177e2005-04-16 15:20:36 -070092 status = nfserr_bad_xdr; \
93 goto out
94
95#define READ32(x) (x) = ntohl(*p++)
96#define READ64(x) do { \
97 (x) = (u64)ntohl(*p++) << 32; \
98 (x) |= ntohl(*p++); \
99} while (0)
100#define READTIME(x) do { \
101 p++; \
102 (x) = ntohl(*p++); \
103 p++; \
104} while (0)
105#define READMEM(x,nbytes) do { \
106 x = (char *)p; \
107 p += XDR_QUADLEN(nbytes); \
108} while (0)
109#define SAVEMEM(x,nbytes) do { \
110 if (!(x = (p==argp->tmp || p == argp->tmpp) ? \
111 savemem(argp, p, nbytes) : \
112 (char *)p)) { \
Chuck Lever817cb9d2007-09-11 18:01:20 -0400113 dprintk("NFSD: xdr error (%s:%d)\n", \
114 __FILE__, __LINE__); \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700115 goto xdr_error; \
116 } \
117 p += XDR_QUADLEN(nbytes); \
118} while (0)
119#define COPYMEM(x,nbytes) do { \
120 memcpy((x), p, nbytes); \
121 p += XDR_QUADLEN(nbytes); \
122} while (0)
123
124/* READ_BUF, read_buf(): nbytes must be <= PAGE_SIZE */
125#define READ_BUF(nbytes) do { \
126 if (nbytes <= (u32)((char *)argp->end - (char *)argp->p)) { \
127 p = argp->p; \
128 argp->p += XDR_QUADLEN(nbytes); \
129 } else if (!(p = read_buf(argp, nbytes))) { \
Chuck Lever817cb9d2007-09-11 18:01:20 -0400130 dprintk("NFSD: xdr error (%s:%d)\n", \
131 __FILE__, __LINE__); \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700132 goto xdr_error; \
133 } \
134} while (0)
135
Bryan Schumaker17456802011-07-13 10:50:48 -0400136static void save_buf(struct nfsd4_compoundargs *argp, struct nfsd4_saved_compoundargs *savep)
137{
138 savep->p = argp->p;
139 savep->end = argp->end;
140 savep->pagelen = argp->pagelen;
141 savep->pagelist = argp->pagelist;
142}
143
144static void restore_buf(struct nfsd4_compoundargs *argp, struct nfsd4_saved_compoundargs *savep)
145{
146 argp->p = savep->p;
147 argp->end = savep->end;
148 argp->pagelen = savep->pagelen;
149 argp->pagelist = savep->pagelist;
150}
151
J. Bruce Fieldsca2a05a2007-11-11 15:43:12 -0500152static __be32 *read_buf(struct nfsd4_compoundargs *argp, u32 nbytes)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700153{
154 /* We want more bytes than seem to be available.
155 * Maybe we need a new page, maybe we have just run out
156 */
J. Bruce Fieldsca2a05a2007-11-11 15:43:12 -0500157 unsigned int avail = (char *)argp->end - (char *)argp->p;
Al Viro2ebbc012006-10-19 23:28:58 -0700158 __be32 *p;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700159 if (avail + argp->pagelen < nbytes)
160 return NULL;
161 if (avail + PAGE_SIZE < nbytes) /* need more than a page !! */
162 return NULL;
163 /* ok, we can do it with the current plus the next page */
164 if (nbytes <= sizeof(argp->tmp))
165 p = argp->tmp;
166 else {
Jesper Juhlf99d49a2005-11-07 01:01:34 -0800167 kfree(argp->tmpp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700168 p = argp->tmpp = kmalloc(nbytes, GFP_KERNEL);
169 if (!p)
170 return NULL;
171
172 }
J. Bruce Fieldsca2a05a2007-11-11 15:43:12 -0500173 /*
174 * The following memcpy is safe because read_buf is always
175 * called with nbytes > avail, and the two cases above both
176 * guarantee p points to at least nbytes bytes.
177 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700178 memcpy(p, argp->p, avail);
179 /* step to next page */
180 argp->p = page_address(argp->pagelist[0]);
181 argp->pagelist++;
182 if (argp->pagelen < PAGE_SIZE) {
Neil Brown2bc3c112010-04-20 12:16:52 +1000183 argp->end = argp->p + (argp->pagelen>>2);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700184 argp->pagelen = 0;
185 } else {
Neil Brown2bc3c112010-04-20 12:16:52 +1000186 argp->end = argp->p + (PAGE_SIZE>>2);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700187 argp->pagelen -= PAGE_SIZE;
188 }
189 memcpy(((char*)p)+avail, argp->p, (nbytes - avail));
190 argp->p += XDR_QUADLEN(nbytes - avail);
191 return p;
192}
193
Andy Adamson60adfc52009-04-03 08:28:50 +0300194static int zero_clientid(clientid_t *clid)
195{
196 return (clid->cl_boot == 0) && (clid->cl_id == 0);
197}
198
Linus Torvalds1da177e2005-04-16 15:20:36 -0700199static int
200defer_free(struct nfsd4_compoundargs *argp,
201 void (*release)(const void *), void *p)
202{
203 struct tmpbuf *tb;
204
205 tb = kmalloc(sizeof(*tb), GFP_KERNEL);
206 if (!tb)
207 return -ENOMEM;
208 tb->buf = p;
209 tb->release = release;
210 tb->next = argp->to_free;
211 argp->to_free = tb;
212 return 0;
213}
214
Al Viro2ebbc012006-10-19 23:28:58 -0700215static char *savemem(struct nfsd4_compoundargs *argp, __be32 *p, int nbytes)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700216{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700217 if (p == argp->tmp) {
J. Bruce Fieldsa4db5fe2007-02-16 01:28:30 -0800218 p = kmalloc(nbytes, GFP_KERNEL);
219 if (!p)
220 return NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700221 memcpy(p, argp->tmp, nbytes);
222 } else {
Eric Sesterhenn73dff8b2006-10-03 23:37:14 +0200223 BUG_ON(p != argp->tmpp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700224 argp->tmpp = NULL;
225 }
226 if (defer_free(argp, kfree, p)) {
J. Bruce Fieldsa4db5fe2007-02-16 01:28:30 -0800227 kfree(p);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700228 return NULL;
229 } else
230 return (char *)p;
231}
232
Al Virob37ad282006-10-19 23:28:59 -0700233static __be32
Linus Torvalds1da177e2005-04-16 15:20:36 -0700234nfsd4_decode_bitmap(struct nfsd4_compoundargs *argp, u32 *bmval)
235{
236 u32 bmlen;
237 DECODE_HEAD;
238
239 bmval[0] = 0;
240 bmval[1] = 0;
Andy Adamson7e705702009-04-03 08:29:11 +0300241 bmval[2] = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700242
243 READ_BUF(4);
244 READ32(bmlen);
245 if (bmlen > 1000)
246 goto xdr_error;
247
248 READ_BUF(bmlen << 2);
249 if (bmlen > 0)
250 READ32(bmval[0]);
251 if (bmlen > 1)
252 READ32(bmval[1]);
Andy Adamson7e705702009-04-03 08:29:11 +0300253 if (bmlen > 2)
254 READ32(bmval[2]);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700255
256 DECODE_TAIL;
257}
258
Al Virob37ad282006-10-19 23:28:59 -0700259static __be32
Yu Zhiguo3c8e0312009-05-16 16:22:31 +0800260nfsd4_decode_fattr(struct nfsd4_compoundargs *argp, u32 *bmval,
Benny Halevyc0d6fc82009-04-03 08:29:05 +0300261 struct iattr *iattr, struct nfs4_acl **acl)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700262{
263 int expected_len, len = 0;
264 u32 dummy32;
265 char *buf;
Al Virob8dd7b92006-10-19 23:29:01 -0700266 int host_err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700267
268 DECODE_HEAD;
269 iattr->ia_valid = 0;
270 if ((status = nfsd4_decode_bitmap(argp, bmval)))
271 return status;
272
Linus Torvalds1da177e2005-04-16 15:20:36 -0700273 READ_BUF(4);
274 READ32(expected_len);
275
276 if (bmval[0] & FATTR4_WORD0_SIZE) {
277 READ_BUF(8);
278 len += 8;
279 READ64(iattr->ia_size);
280 iattr->ia_valid |= ATTR_SIZE;
281 }
282 if (bmval[0] & FATTR4_WORD0_ACL) {
J. Bruce Fields28e05dd2007-02-16 01:28:30 -0800283 int nace;
284 struct nfs4_ace *ace;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700285
286 READ_BUF(4); len += 4;
287 READ32(nace);
288
J. Bruce Fields28e05dd2007-02-16 01:28:30 -0800289 if (nace > NFS4_ACL_MAX)
290 return nfserr_resource;
291
292 *acl = nfs4_acl_new(nace);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700293 if (*acl == NULL) {
Al Virob8dd7b92006-10-19 23:29:01 -0700294 host_err = -ENOMEM;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700295 goto out_nfserr;
296 }
J. Bruce Fields28e05dd2007-02-16 01:28:30 -0800297 defer_free(argp, kfree, *acl);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700298
J. Bruce Fields28e05dd2007-02-16 01:28:30 -0800299 (*acl)->naces = nace;
300 for (ace = (*acl)->aces; ace < (*acl)->aces + nace; ace++) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700301 READ_BUF(16); len += 16;
J. Bruce Fields28e05dd2007-02-16 01:28:30 -0800302 READ32(ace->type);
303 READ32(ace->flag);
304 READ32(ace->access_mask);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700305 READ32(dummy32);
306 READ_BUF(dummy32);
307 len += XDR_QUADLEN(dummy32) << 2;
308 READMEM(buf, dummy32);
J. Bruce Fields28e05dd2007-02-16 01:28:30 -0800309 ace->whotype = nfs4_acl_get_whotype(buf, dummy32);
J. Bruce Fields3c726022011-01-04 17:53:52 -0500310 status = nfs_ok;
J. Bruce Fields28e05dd2007-02-16 01:28:30 -0800311 if (ace->whotype != NFS4_ACL_WHO_NAMED)
312 ace->who = 0;
313 else if (ace->flag & NFS4_ACE_IDENTIFIER_GROUP)
J. Bruce Fields3c726022011-01-04 17:53:52 -0500314 status = nfsd_map_name_to_gid(argp->rqstp,
J. Bruce Fields28e05dd2007-02-16 01:28:30 -0800315 buf, dummy32, &ace->who);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700316 else
J. Bruce Fields3c726022011-01-04 17:53:52 -0500317 status = nfsd_map_name_to_uid(argp->rqstp,
J. Bruce Fields28e05dd2007-02-16 01:28:30 -0800318 buf, dummy32, &ace->who);
J. Bruce Fields3c726022011-01-04 17:53:52 -0500319 if (status)
320 return status;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700321 }
322 } else
323 *acl = NULL;
324 if (bmval[1] & FATTR4_WORD1_MODE) {
325 READ_BUF(4);
326 len += 4;
327 READ32(iattr->ia_mode);
328 iattr->ia_mode &= (S_IFMT | S_IALLUGO);
329 iattr->ia_valid |= ATTR_MODE;
330 }
331 if (bmval[1] & FATTR4_WORD1_OWNER) {
332 READ_BUF(4);
333 len += 4;
334 READ32(dummy32);
335 READ_BUF(dummy32);
336 len += (XDR_QUADLEN(dummy32) << 2);
337 READMEM(buf, dummy32);
NeilBrown47c85292011-02-16 13:08:35 +1100338 if ((status = nfsd_map_name_to_uid(argp->rqstp, buf, dummy32, &iattr->ia_uid)))
339 return status;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700340 iattr->ia_valid |= ATTR_UID;
341 }
342 if (bmval[1] & FATTR4_WORD1_OWNER_GROUP) {
343 READ_BUF(4);
344 len += 4;
345 READ32(dummy32);
346 READ_BUF(dummy32);
347 len += (XDR_QUADLEN(dummy32) << 2);
348 READMEM(buf, dummy32);
NeilBrown47c85292011-02-16 13:08:35 +1100349 if ((status = nfsd_map_name_to_gid(argp->rqstp, buf, dummy32, &iattr->ia_gid)))
350 return status;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700351 iattr->ia_valid |= ATTR_GID;
352 }
353 if (bmval[1] & FATTR4_WORD1_TIME_ACCESS_SET) {
354 READ_BUF(4);
355 len += 4;
356 READ32(dummy32);
357 switch (dummy32) {
358 case NFS4_SET_TO_CLIENT_TIME:
359 /* We require the high 32 bits of 'seconds' to be 0, and we ignore
360 all 32 bits of 'nseconds'. */
361 READ_BUF(12);
362 len += 12;
363 READ32(dummy32);
364 if (dummy32)
365 return nfserr_inval;
366 READ32(iattr->ia_atime.tv_sec);
367 READ32(iattr->ia_atime.tv_nsec);
368 if (iattr->ia_atime.tv_nsec >= (u32)1000000000)
369 return nfserr_inval;
370 iattr->ia_valid |= (ATTR_ATIME | ATTR_ATIME_SET);
371 break;
372 case NFS4_SET_TO_SERVER_TIME:
373 iattr->ia_valid |= ATTR_ATIME;
374 break;
375 default:
376 goto xdr_error;
377 }
378 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700379 if (bmval[1] & FATTR4_WORD1_TIME_MODIFY_SET) {
380 READ_BUF(4);
381 len += 4;
382 READ32(dummy32);
383 switch (dummy32) {
384 case NFS4_SET_TO_CLIENT_TIME:
385 /* We require the high 32 bits of 'seconds' to be 0, and we ignore
386 all 32 bits of 'nseconds'. */
387 READ_BUF(12);
388 len += 12;
389 READ32(dummy32);
390 if (dummy32)
391 return nfserr_inval;
392 READ32(iattr->ia_mtime.tv_sec);
393 READ32(iattr->ia_mtime.tv_nsec);
394 if (iattr->ia_mtime.tv_nsec >= (u32)1000000000)
395 return nfserr_inval;
396 iattr->ia_valid |= (ATTR_MTIME | ATTR_MTIME_SET);
397 break;
398 case NFS4_SET_TO_SERVER_TIME:
399 iattr->ia_valid |= ATTR_MTIME;
400 break;
401 default:
402 goto xdr_error;
403 }
404 }
Yu Zhiguo3c8e0312009-05-16 16:22:31 +0800405 if (bmval[0] & ~NFSD_WRITEABLE_ATTRS_WORD0
406 || bmval[1] & ~NFSD_WRITEABLE_ATTRS_WORD1
407 || bmval[2] & ~NFSD_WRITEABLE_ATTRS_WORD2)
408 READ_BUF(expected_len - len);
409 else if (len != expected_len)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700410 goto xdr_error;
411
412 DECODE_TAIL;
413
414out_nfserr:
Al Virob8dd7b92006-10-19 23:29:01 -0700415 status = nfserrno(host_err);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700416 goto out;
417}
418
Al Virob37ad282006-10-19 23:28:59 -0700419static __be32
Benny Halevye31a1b62008-08-12 20:46:18 +0300420nfsd4_decode_stateid(struct nfsd4_compoundargs *argp, stateid_t *sid)
421{
422 DECODE_HEAD;
423
424 READ_BUF(sizeof(stateid_t));
425 READ32(sid->si_generation);
426 COPYMEM(&sid->si_opaque, sizeof(stateid_opaque_t));
427
428 DECODE_TAIL;
429}
430
431static __be32
Linus Torvalds1da177e2005-04-16 15:20:36 -0700432nfsd4_decode_access(struct nfsd4_compoundargs *argp, struct nfsd4_access *access)
433{
434 DECODE_HEAD;
435
436 READ_BUF(4);
437 READ32(access->ac_req_access);
438
439 DECODE_TAIL;
440}
441
J. Bruce Fields1d1bc8f2010-10-04 23:12:59 -0400442static __be32 nfsd4_decode_bind_conn_to_session(struct nfsd4_compoundargs *argp, struct nfsd4_bind_conn_to_session *bcts)
443{
444 DECODE_HEAD;
J. Bruce Fields1d1bc8f2010-10-04 23:12:59 -0400445
446 READ_BUF(NFS4_MAX_SESSIONID_LEN + 8);
447 COPYMEM(bcts->sessionid.data, NFS4_MAX_SESSIONID_LEN);
448 READ32(bcts->dir);
Bryan Schumaker6ce23572011-04-27 15:47:16 -0400449 /* XXX: skipping ctsa_use_conn_in_rdma_mode. Perhaps Tom Tucker
450 * could help us figure out we should be using it. */
J. Bruce Fields1d1bc8f2010-10-04 23:12:59 -0400451 DECODE_TAIL;
452}
453
Al Virob37ad282006-10-19 23:28:59 -0700454static __be32
Linus Torvalds1da177e2005-04-16 15:20:36 -0700455nfsd4_decode_close(struct nfsd4_compoundargs *argp, struct nfsd4_close *close)
456{
457 DECODE_HEAD;
458
459 close->cl_stateowner = NULL;
Benny Halevye31a1b62008-08-12 20:46:18 +0300460 READ_BUF(4);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700461 READ32(close->cl_seqid);
Benny Halevye31a1b62008-08-12 20:46:18 +0300462 return nfsd4_decode_stateid(argp, &close->cl_stateid);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700463
464 DECODE_TAIL;
465}
466
467
Al Virob37ad282006-10-19 23:28:59 -0700468static __be32
Linus Torvalds1da177e2005-04-16 15:20:36 -0700469nfsd4_decode_commit(struct nfsd4_compoundargs *argp, struct nfsd4_commit *commit)
470{
471 DECODE_HEAD;
472
473 READ_BUF(12);
474 READ64(commit->co_offset);
475 READ32(commit->co_count);
476
477 DECODE_TAIL;
478}
479
Al Virob37ad282006-10-19 23:28:59 -0700480static __be32
Linus Torvalds1da177e2005-04-16 15:20:36 -0700481nfsd4_decode_create(struct nfsd4_compoundargs *argp, struct nfsd4_create *create)
482{
483 DECODE_HEAD;
484
485 READ_BUF(4);
486 READ32(create->cr_type);
487 switch (create->cr_type) {
488 case NF4LNK:
489 READ_BUF(4);
490 READ32(create->cr_linklen);
491 READ_BUF(create->cr_linklen);
492 SAVEMEM(create->cr_linkname, create->cr_linklen);
493 break;
494 case NF4BLK:
495 case NF4CHR:
496 READ_BUF(8);
497 READ32(create->cr_specdata1);
498 READ32(create->cr_specdata2);
499 break;
500 case NF4SOCK:
501 case NF4FIFO:
502 case NF4DIR:
503 default:
504 break;
505 }
506
507 READ_BUF(4);
508 READ32(create->cr_namelen);
509 READ_BUF(create->cr_namelen);
510 SAVEMEM(create->cr_name, create->cr_namelen);
511 if ((status = check_filename(create->cr_name, create->cr_namelen, nfserr_inval)))
512 return status;
513
Yu Zhiguo3c8e0312009-05-16 16:22:31 +0800514 status = nfsd4_decode_fattr(argp, create->cr_bmval, &create->cr_iattr,
515 &create->cr_acl);
Benny Halevyc0d6fc82009-04-03 08:29:05 +0300516 if (status)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700517 goto out;
518
519 DECODE_TAIL;
520}
521
Al Virob37ad282006-10-19 23:28:59 -0700522static inline __be32
Linus Torvalds1da177e2005-04-16 15:20:36 -0700523nfsd4_decode_delegreturn(struct nfsd4_compoundargs *argp, struct nfsd4_delegreturn *dr)
524{
Benny Halevye31a1b62008-08-12 20:46:18 +0300525 return nfsd4_decode_stateid(argp, &dr->dr_stateid);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700526}
527
Al Virob37ad282006-10-19 23:28:59 -0700528static inline __be32
Linus Torvalds1da177e2005-04-16 15:20:36 -0700529nfsd4_decode_getattr(struct nfsd4_compoundargs *argp, struct nfsd4_getattr *getattr)
530{
531 return nfsd4_decode_bitmap(argp, getattr->ga_bmval);
532}
533
Al Virob37ad282006-10-19 23:28:59 -0700534static __be32
Linus Torvalds1da177e2005-04-16 15:20:36 -0700535nfsd4_decode_link(struct nfsd4_compoundargs *argp, struct nfsd4_link *link)
536{
537 DECODE_HEAD;
538
539 READ_BUF(4);
540 READ32(link->li_namelen);
541 READ_BUF(link->li_namelen);
542 SAVEMEM(link->li_name, link->li_namelen);
543 if ((status = check_filename(link->li_name, link->li_namelen, nfserr_inval)))
544 return status;
545
546 DECODE_TAIL;
547}
548
Al Virob37ad282006-10-19 23:28:59 -0700549static __be32
Linus Torvalds1da177e2005-04-16 15:20:36 -0700550nfsd4_decode_lock(struct nfsd4_compoundargs *argp, struct nfsd4_lock *lock)
551{
552 DECODE_HEAD;
553
J. Bruce Fields3a655882006-01-18 17:43:19 -0800554 lock->lk_replay_owner = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700555 /*
556 * type, reclaim(boolean), offset, length, new_lock_owner(boolean)
557 */
558 READ_BUF(28);
559 READ32(lock->lk_type);
560 if ((lock->lk_type < NFS4_READ_LT) || (lock->lk_type > NFS4_WRITEW_LT))
561 goto xdr_error;
562 READ32(lock->lk_reclaim);
563 READ64(lock->lk_offset);
564 READ64(lock->lk_length);
565 READ32(lock->lk_is_new);
566
567 if (lock->lk_is_new) {
Benny Halevye31a1b62008-08-12 20:46:18 +0300568 READ_BUF(4);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700569 READ32(lock->lk_new_open_seqid);
Benny Halevye31a1b62008-08-12 20:46:18 +0300570 status = nfsd4_decode_stateid(argp, &lock->lk_new_open_stateid);
571 if (status)
572 return status;
573 READ_BUF(8 + sizeof(clientid_t));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700574 READ32(lock->lk_new_lock_seqid);
575 COPYMEM(&lock->lk_new_clientid, sizeof(clientid_t));
576 READ32(lock->lk_new_owner.len);
577 READ_BUF(lock->lk_new_owner.len);
578 READMEM(lock->lk_new_owner.data, lock->lk_new_owner.len);
579 } else {
Benny Halevye31a1b62008-08-12 20:46:18 +0300580 status = nfsd4_decode_stateid(argp, &lock->lk_old_lock_stateid);
581 if (status)
582 return status;
583 READ_BUF(4);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700584 READ32(lock->lk_old_lock_seqid);
585 }
586
587 DECODE_TAIL;
588}
589
Al Virob37ad282006-10-19 23:28:59 -0700590static __be32
Linus Torvalds1da177e2005-04-16 15:20:36 -0700591nfsd4_decode_lockt(struct nfsd4_compoundargs *argp, struct nfsd4_lockt *lockt)
592{
593 DECODE_HEAD;
594
595 READ_BUF(32);
596 READ32(lockt->lt_type);
597 if((lockt->lt_type < NFS4_READ_LT) || (lockt->lt_type > NFS4_WRITEW_LT))
598 goto xdr_error;
599 READ64(lockt->lt_offset);
600 READ64(lockt->lt_length);
601 COPYMEM(&lockt->lt_clientid, 8);
602 READ32(lockt->lt_owner.len);
603 READ_BUF(lockt->lt_owner.len);
604 READMEM(lockt->lt_owner.data, lockt->lt_owner.len);
605
606 DECODE_TAIL;
607}
608
Al Virob37ad282006-10-19 23:28:59 -0700609static __be32
Linus Torvalds1da177e2005-04-16 15:20:36 -0700610nfsd4_decode_locku(struct nfsd4_compoundargs *argp, struct nfsd4_locku *locku)
611{
612 DECODE_HEAD;
613
614 locku->lu_stateowner = NULL;
Benny Halevye31a1b62008-08-12 20:46:18 +0300615 READ_BUF(8);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700616 READ32(locku->lu_type);
617 if ((locku->lu_type < NFS4_READ_LT) || (locku->lu_type > NFS4_WRITEW_LT))
618 goto xdr_error;
619 READ32(locku->lu_seqid);
Benny Halevye31a1b62008-08-12 20:46:18 +0300620 status = nfsd4_decode_stateid(argp, &locku->lu_stateid);
621 if (status)
622 return status;
623 READ_BUF(16);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700624 READ64(locku->lu_offset);
625 READ64(locku->lu_length);
626
627 DECODE_TAIL;
628}
629
Al Virob37ad282006-10-19 23:28:59 -0700630static __be32
Linus Torvalds1da177e2005-04-16 15:20:36 -0700631nfsd4_decode_lookup(struct nfsd4_compoundargs *argp, struct nfsd4_lookup *lookup)
632{
633 DECODE_HEAD;
634
635 READ_BUF(4);
636 READ32(lookup->lo_len);
637 READ_BUF(lookup->lo_len);
638 SAVEMEM(lookup->lo_name, lookup->lo_len);
639 if ((status = check_filename(lookup->lo_name, lookup->lo_len, nfserr_noent)))
640 return status;
641
642 DECODE_TAIL;
643}
644
Al Virob37ad282006-10-19 23:28:59 -0700645static __be32
Linus Torvalds1da177e2005-04-16 15:20:36 -0700646nfsd4_decode_open(struct nfsd4_compoundargs *argp, struct nfsd4_open *open)
647{
648 DECODE_HEAD;
649
650 memset(open->op_bmval, 0, sizeof(open->op_bmval));
651 open->op_iattr.ia_valid = 0;
652 open->op_stateowner = NULL;
653
654 /* seqid, share_access, share_deny, clientid, ownerlen */
655 READ_BUF(16 + sizeof(clientid_t));
656 READ32(open->op_seqid);
657 READ32(open->op_share_access);
658 READ32(open->op_share_deny);
659 COPYMEM(&open->op_clientid, sizeof(clientid_t));
660 READ32(open->op_owner.len);
661
662 /* owner, open_flag */
663 READ_BUF(open->op_owner.len + 4);
664 SAVEMEM(open->op_owner.data, open->op_owner.len);
665 READ32(open->op_create);
666 switch (open->op_create) {
667 case NFS4_OPEN_NOCREATE:
668 break;
669 case NFS4_OPEN_CREATE:
670 READ_BUF(4);
671 READ32(open->op_createmode);
672 switch (open->op_createmode) {
673 case NFS4_CREATE_UNCHECKED:
674 case NFS4_CREATE_GUARDED:
Benny Halevyc0d6fc82009-04-03 08:29:05 +0300675 status = nfsd4_decode_fattr(argp, open->op_bmval,
Yu Zhiguo3c8e0312009-05-16 16:22:31 +0800676 &open->op_iattr, &open->op_acl);
Benny Halevyc0d6fc82009-04-03 08:29:05 +0300677 if (status)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700678 goto out;
679 break;
680 case NFS4_CREATE_EXCLUSIVE:
681 READ_BUF(8);
682 COPYMEM(open->op_verf.data, 8);
683 break;
Benny Halevy79fb54a2009-04-03 08:29:17 +0300684 case NFS4_CREATE_EXCLUSIVE4_1:
685 if (argp->minorversion < 1)
686 goto xdr_error;
687 READ_BUF(8);
688 COPYMEM(open->op_verf.data, 8);
689 status = nfsd4_decode_fattr(argp, open->op_bmval,
Yu Zhiguo3c8e0312009-05-16 16:22:31 +0800690 &open->op_iattr, &open->op_acl);
Benny Halevy79fb54a2009-04-03 08:29:17 +0300691 if (status)
692 goto out;
693 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700694 default:
695 goto xdr_error;
696 }
697 break;
698 default:
699 goto xdr_error;
700 }
701
702 /* open_claim */
703 READ_BUF(4);
704 READ32(open->op_claim_type);
705 switch (open->op_claim_type) {
706 case NFS4_OPEN_CLAIM_NULL:
707 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
708 READ_BUF(4);
709 READ32(open->op_fname.len);
710 READ_BUF(open->op_fname.len);
711 SAVEMEM(open->op_fname.data, open->op_fname.len);
712 if ((status = check_filename(open->op_fname.data, open->op_fname.len, nfserr_inval)))
713 return status;
714 break;
715 case NFS4_OPEN_CLAIM_PREVIOUS:
716 READ_BUF(4);
717 READ32(open->op_delegate_type);
718 break;
719 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
Benny Halevye31a1b62008-08-12 20:46:18 +0300720 status = nfsd4_decode_stateid(argp, &open->op_delegate_stateid);
721 if (status)
722 return status;
723 READ_BUF(4);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700724 READ32(open->op_fname.len);
725 READ_BUF(open->op_fname.len);
726 SAVEMEM(open->op_fname.data, open->op_fname.len);
727 if ((status = check_filename(open->op_fname.data, open->op_fname.len, nfserr_inval)))
728 return status;
729 break;
730 default:
731 goto xdr_error;
732 }
733
734 DECODE_TAIL;
735}
736
Al Virob37ad282006-10-19 23:28:59 -0700737static __be32
Linus Torvalds1da177e2005-04-16 15:20:36 -0700738nfsd4_decode_open_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_open_confirm *open_conf)
739{
740 DECODE_HEAD;
741
742 open_conf->oc_stateowner = NULL;
Benny Halevye31a1b62008-08-12 20:46:18 +0300743 status = nfsd4_decode_stateid(argp, &open_conf->oc_req_stateid);
744 if (status)
745 return status;
746 READ_BUF(4);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700747 READ32(open_conf->oc_seqid);
748
749 DECODE_TAIL;
750}
751
Al Virob37ad282006-10-19 23:28:59 -0700752static __be32
Linus Torvalds1da177e2005-04-16 15:20:36 -0700753nfsd4_decode_open_downgrade(struct nfsd4_compoundargs *argp, struct nfsd4_open_downgrade *open_down)
754{
755 DECODE_HEAD;
756
757 open_down->od_stateowner = NULL;
Benny Halevye31a1b62008-08-12 20:46:18 +0300758 status = nfsd4_decode_stateid(argp, &open_down->od_stateid);
759 if (status)
760 return status;
761 READ_BUF(12);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700762 READ32(open_down->od_seqid);
763 READ32(open_down->od_share_access);
764 READ32(open_down->od_share_deny);
765
766 DECODE_TAIL;
767}
768
Al Virob37ad282006-10-19 23:28:59 -0700769static __be32
Linus Torvalds1da177e2005-04-16 15:20:36 -0700770nfsd4_decode_putfh(struct nfsd4_compoundargs *argp, struct nfsd4_putfh *putfh)
771{
772 DECODE_HEAD;
773
774 READ_BUF(4);
775 READ32(putfh->pf_fhlen);
776 if (putfh->pf_fhlen > NFS4_FHSIZE)
777 goto xdr_error;
778 READ_BUF(putfh->pf_fhlen);
779 SAVEMEM(putfh->pf_fhval, putfh->pf_fhlen);
780
781 DECODE_TAIL;
782}
783
Al Virob37ad282006-10-19 23:28:59 -0700784static __be32
Linus Torvalds1da177e2005-04-16 15:20:36 -0700785nfsd4_decode_read(struct nfsd4_compoundargs *argp, struct nfsd4_read *read)
786{
787 DECODE_HEAD;
788
Benny Halevye31a1b62008-08-12 20:46:18 +0300789 status = nfsd4_decode_stateid(argp, &read->rd_stateid);
790 if (status)
791 return status;
792 READ_BUF(12);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700793 READ64(read->rd_offset);
794 READ32(read->rd_length);
795
796 DECODE_TAIL;
797}
798
Al Virob37ad282006-10-19 23:28:59 -0700799static __be32
Linus Torvalds1da177e2005-04-16 15:20:36 -0700800nfsd4_decode_readdir(struct nfsd4_compoundargs *argp, struct nfsd4_readdir *readdir)
801{
802 DECODE_HEAD;
803
804 READ_BUF(24);
805 READ64(readdir->rd_cookie);
806 COPYMEM(readdir->rd_verf.data, sizeof(readdir->rd_verf.data));
807 READ32(readdir->rd_dircount); /* just in case you needed a useless field... */
808 READ32(readdir->rd_maxcount);
809 if ((status = nfsd4_decode_bitmap(argp, readdir->rd_bmval)))
810 goto out;
811
812 DECODE_TAIL;
813}
814
Al Virob37ad282006-10-19 23:28:59 -0700815static __be32
Linus Torvalds1da177e2005-04-16 15:20:36 -0700816nfsd4_decode_remove(struct nfsd4_compoundargs *argp, struct nfsd4_remove *remove)
817{
818 DECODE_HEAD;
819
820 READ_BUF(4);
821 READ32(remove->rm_namelen);
822 READ_BUF(remove->rm_namelen);
823 SAVEMEM(remove->rm_name, remove->rm_namelen);
824 if ((status = check_filename(remove->rm_name, remove->rm_namelen, nfserr_noent)))
825 return status;
826
827 DECODE_TAIL;
828}
829
Al Virob37ad282006-10-19 23:28:59 -0700830static __be32
Linus Torvalds1da177e2005-04-16 15:20:36 -0700831nfsd4_decode_rename(struct nfsd4_compoundargs *argp, struct nfsd4_rename *rename)
832{
833 DECODE_HEAD;
834
835 READ_BUF(4);
836 READ32(rename->rn_snamelen);
837 READ_BUF(rename->rn_snamelen + 4);
838 SAVEMEM(rename->rn_sname, rename->rn_snamelen);
839 READ32(rename->rn_tnamelen);
840 READ_BUF(rename->rn_tnamelen);
841 SAVEMEM(rename->rn_tname, rename->rn_tnamelen);
842 if ((status = check_filename(rename->rn_sname, rename->rn_snamelen, nfserr_noent)))
843 return status;
844 if ((status = check_filename(rename->rn_tname, rename->rn_tnamelen, nfserr_inval)))
845 return status;
846
847 DECODE_TAIL;
848}
849
Al Virob37ad282006-10-19 23:28:59 -0700850static __be32
Linus Torvalds1da177e2005-04-16 15:20:36 -0700851nfsd4_decode_renew(struct nfsd4_compoundargs *argp, clientid_t *clientid)
852{
853 DECODE_HEAD;
854
855 READ_BUF(sizeof(clientid_t));
856 COPYMEM(clientid, sizeof(clientid_t));
857
858 DECODE_TAIL;
859}
860
Al Virob37ad282006-10-19 23:28:59 -0700861static __be32
Andy Adamsondcb488a32007-07-17 04:04:51 -0700862nfsd4_decode_secinfo(struct nfsd4_compoundargs *argp,
863 struct nfsd4_secinfo *secinfo)
864{
865 DECODE_HEAD;
866
867 READ_BUF(4);
868 READ32(secinfo->si_namelen);
869 READ_BUF(secinfo->si_namelen);
870 SAVEMEM(secinfo->si_name, secinfo->si_namelen);
871 status = check_filename(secinfo->si_name, secinfo->si_namelen,
872 nfserr_noent);
873 if (status)
874 return status;
875 DECODE_TAIL;
876}
877
878static __be32
J. Bruce Fields04f4ad12010-12-16 09:51:13 -0500879nfsd4_decode_secinfo_no_name(struct nfsd4_compoundargs *argp,
880 struct nfsd4_secinfo_no_name *sin)
881{
882 DECODE_HEAD;
883
884 READ_BUF(4);
885 READ32(sin->sin_style);
886 DECODE_TAIL;
887}
888
889static __be32
Linus Torvalds1da177e2005-04-16 15:20:36 -0700890nfsd4_decode_setattr(struct nfsd4_compoundargs *argp, struct nfsd4_setattr *setattr)
891{
Benny Halevye31a1b62008-08-12 20:46:18 +0300892 __be32 status;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700893
Benny Halevye31a1b62008-08-12 20:46:18 +0300894 status = nfsd4_decode_stateid(argp, &setattr->sa_stateid);
895 if (status)
896 return status;
Yu Zhiguo3c8e0312009-05-16 16:22:31 +0800897 return nfsd4_decode_fattr(argp, setattr->sa_bmval, &setattr->sa_iattr,
898 &setattr->sa_acl);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700899}
900
Al Virob37ad282006-10-19 23:28:59 -0700901static __be32
Linus Torvalds1da177e2005-04-16 15:20:36 -0700902nfsd4_decode_setclientid(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid *setclientid)
903{
904 DECODE_HEAD;
905
906 READ_BUF(12);
907 COPYMEM(setclientid->se_verf.data, 8);
908 READ32(setclientid->se_namelen);
909
910 READ_BUF(setclientid->se_namelen + 8);
911 SAVEMEM(setclientid->se_name, setclientid->se_namelen);
912 READ32(setclientid->se_callback_prog);
913 READ32(setclientid->se_callback_netid_len);
914
915 READ_BUF(setclientid->se_callback_netid_len + 4);
916 SAVEMEM(setclientid->se_callback_netid_val, setclientid->se_callback_netid_len);
917 READ32(setclientid->se_callback_addr_len);
918
919 READ_BUF(setclientid->se_callback_addr_len + 4);
920 SAVEMEM(setclientid->se_callback_addr_val, setclientid->se_callback_addr_len);
921 READ32(setclientid->se_callback_ident);
922
923 DECODE_TAIL;
924}
925
Al Virob37ad282006-10-19 23:28:59 -0700926static __be32
Linus Torvalds1da177e2005-04-16 15:20:36 -0700927nfsd4_decode_setclientid_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid_confirm *scd_c)
928{
929 DECODE_HEAD;
930
931 READ_BUF(8 + sizeof(nfs4_verifier));
932 COPYMEM(&scd_c->sc_clientid, 8);
933 COPYMEM(&scd_c->sc_confirm, sizeof(nfs4_verifier));
934
935 DECODE_TAIL;
936}
937
938/* Also used for NVERIFY */
Al Virob37ad282006-10-19 23:28:59 -0700939static __be32
Linus Torvalds1da177e2005-04-16 15:20:36 -0700940nfsd4_decode_verify(struct nfsd4_compoundargs *argp, struct nfsd4_verify *verify)
941{
942#if 0
943 struct nfsd4_compoundargs save = {
944 .p = argp->p,
945 .end = argp->end,
946 .rqstp = argp->rqstp,
947 };
948 u32 ve_bmval[2];
949 struct iattr ve_iattr; /* request */
950 struct nfs4_acl *ve_acl; /* request */
951#endif
952 DECODE_HEAD;
953
954 if ((status = nfsd4_decode_bitmap(argp, verify->ve_bmval)))
955 goto out;
956
957 /* For convenience's sake, we compare raw xdr'd attributes in
958 * nfsd4_proc_verify; however we still decode here just to return
959 * correct error in case of bad xdr. */
960#if 0
961 status = nfsd4_decode_fattr(ve_bmval, &ve_iattr, &ve_acl);
962 if (status == nfserr_inval) {
963 status = nfserrno(status);
964 goto out;
965 }
966#endif
967 READ_BUF(4);
968 READ32(verify->ve_attrlen);
969 READ_BUF(verify->ve_attrlen);
970 SAVEMEM(verify->ve_attrval, verify->ve_attrlen);
971
972 DECODE_TAIL;
973}
974
Al Virob37ad282006-10-19 23:28:59 -0700975static __be32
Linus Torvalds1da177e2005-04-16 15:20:36 -0700976nfsd4_decode_write(struct nfsd4_compoundargs *argp, struct nfsd4_write *write)
977{
978 int avail;
979 int v;
980 int len;
981 DECODE_HEAD;
982
Benny Halevye31a1b62008-08-12 20:46:18 +0300983 status = nfsd4_decode_stateid(argp, &write->wr_stateid);
984 if (status)
985 return status;
986 READ_BUF(16);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700987 READ64(write->wr_offset);
988 READ32(write->wr_stable_how);
989 if (write->wr_stable_how > 2)
990 goto xdr_error;
991 READ32(write->wr_buflen);
992
993 /* Sorry .. no magic macros for this.. *
994 * READ_BUF(write->wr_buflen);
995 * SAVEMEM(write->wr_buf, write->wr_buflen);
996 */
997 avail = (char*)argp->end - (char*)argp->p;
998 if (avail + argp->pagelen < write->wr_buflen) {
Chuck Lever817cb9d2007-09-11 18:01:20 -0400999 dprintk("NFSD: xdr error (%s:%d)\n",
1000 __FILE__, __LINE__);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001001 goto xdr_error;
1002 }
NeilBrown3cc03b12006-10-04 02:15:47 -07001003 argp->rqstp->rq_vec[0].iov_base = p;
1004 argp->rqstp->rq_vec[0].iov_len = avail;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001005 v = 0;
1006 len = write->wr_buflen;
NeilBrown3cc03b12006-10-04 02:15:47 -07001007 while (len > argp->rqstp->rq_vec[v].iov_len) {
1008 len -= argp->rqstp->rq_vec[v].iov_len;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001009 v++;
NeilBrown3cc03b12006-10-04 02:15:47 -07001010 argp->rqstp->rq_vec[v].iov_base = page_address(argp->pagelist[0]);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001011 argp->pagelist++;
1012 if (argp->pagelen >= PAGE_SIZE) {
NeilBrown3cc03b12006-10-04 02:15:47 -07001013 argp->rqstp->rq_vec[v].iov_len = PAGE_SIZE;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001014 argp->pagelen -= PAGE_SIZE;
1015 } else {
NeilBrown3cc03b12006-10-04 02:15:47 -07001016 argp->rqstp->rq_vec[v].iov_len = argp->pagelen;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001017 argp->pagelen -= len;
1018 }
1019 }
Al Viro2ebbc012006-10-19 23:28:58 -07001020 argp->end = (__be32*) (argp->rqstp->rq_vec[v].iov_base + argp->rqstp->rq_vec[v].iov_len);
1021 argp->p = (__be32*) (argp->rqstp->rq_vec[v].iov_base + (XDR_QUADLEN(len) << 2));
NeilBrown3cc03b12006-10-04 02:15:47 -07001022 argp->rqstp->rq_vec[v].iov_len = len;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001023 write->wr_vlen = v+1;
1024
1025 DECODE_TAIL;
1026}
1027
Al Virob37ad282006-10-19 23:28:59 -07001028static __be32
Linus Torvalds1da177e2005-04-16 15:20:36 -07001029nfsd4_decode_release_lockowner(struct nfsd4_compoundargs *argp, struct nfsd4_release_lockowner *rlockowner)
1030{
1031 DECODE_HEAD;
1032
1033 READ_BUF(12);
1034 COPYMEM(&rlockowner->rl_clientid, sizeof(clientid_t));
1035 READ32(rlockowner->rl_owner.len);
1036 READ_BUF(rlockowner->rl_owner.len);
1037 READMEM(rlockowner->rl_owner.data, rlockowner->rl_owner.len);
1038
Andy Adamson60adfc52009-04-03 08:28:50 +03001039 if (argp->minorversion && !zero_clientid(&rlockowner->rl_clientid))
1040 return nfserr_inval;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001041 DECODE_TAIL;
1042}
1043
Al Virob37ad282006-10-19 23:28:59 -07001044static __be32
Andy Adamson2db134e2009-04-03 08:27:55 +03001045nfsd4_decode_exchange_id(struct nfsd4_compoundargs *argp,
Andy Adamson0733d212009-04-03 08:28:01 +03001046 struct nfsd4_exchange_id *exid)
Andy Adamson2db134e2009-04-03 08:27:55 +03001047{
Mi Jinlong5afa0402010-11-09 09:39:23 +08001048 int dummy, tmp;
Andy Adamson0733d212009-04-03 08:28:01 +03001049 DECODE_HEAD;
1050
1051 READ_BUF(NFS4_VERIFIER_SIZE);
1052 COPYMEM(exid->verifier.data, NFS4_VERIFIER_SIZE);
1053
1054 READ_BUF(4);
1055 READ32(exid->clname.len);
1056
1057 READ_BUF(exid->clname.len);
1058 SAVEMEM(exid->clname.data, exid->clname.len);
1059
1060 READ_BUF(4);
1061 READ32(exid->flags);
1062
1063 /* Ignore state_protect4_a */
1064 READ_BUF(4);
1065 READ32(exid->spa_how);
1066 switch (exid->spa_how) {
1067 case SP4_NONE:
1068 break;
1069 case SP4_MACH_CRED:
1070 /* spo_must_enforce */
1071 READ_BUF(4);
1072 READ32(dummy);
1073 READ_BUF(dummy * 4);
1074 p += dummy;
1075
1076 /* spo_must_allow */
1077 READ_BUF(4);
1078 READ32(dummy);
1079 READ_BUF(dummy * 4);
1080 p += dummy;
1081 break;
1082 case SP4_SSV:
1083 /* ssp_ops */
1084 READ_BUF(4);
1085 READ32(dummy);
1086 READ_BUF(dummy * 4);
1087 p += dummy;
1088
1089 READ_BUF(4);
1090 READ32(dummy);
1091 READ_BUF(dummy * 4);
1092 p += dummy;
1093
1094 /* ssp_hash_algs<> */
1095 READ_BUF(4);
Mi Jinlong5afa0402010-11-09 09:39:23 +08001096 READ32(tmp);
1097 while (tmp--) {
1098 READ_BUF(4);
1099 READ32(dummy);
1100 READ_BUF(dummy);
1101 p += XDR_QUADLEN(dummy);
1102 }
Andy Adamson0733d212009-04-03 08:28:01 +03001103
1104 /* ssp_encr_algs<> */
1105 READ_BUF(4);
Mi Jinlong5afa0402010-11-09 09:39:23 +08001106 READ32(tmp);
1107 while (tmp--) {
1108 READ_BUF(4);
1109 READ32(dummy);
1110 READ_BUF(dummy);
1111 p += XDR_QUADLEN(dummy);
1112 }
Andy Adamson0733d212009-04-03 08:28:01 +03001113
1114 /* ssp_window and ssp_num_gss_handles */
1115 READ_BUF(8);
1116 READ32(dummy);
1117 READ32(dummy);
1118 break;
1119 default:
1120 goto xdr_error;
1121 }
1122
1123 /* Ignore Implementation ID */
1124 READ_BUF(4); /* nfs_impl_id4 array length */
1125 READ32(dummy);
1126
1127 if (dummy > 1)
1128 goto xdr_error;
1129
1130 if (dummy == 1) {
1131 /* nii_domain */
1132 READ_BUF(4);
1133 READ32(dummy);
1134 READ_BUF(dummy);
1135 p += XDR_QUADLEN(dummy);
1136
1137 /* nii_name */
1138 READ_BUF(4);
1139 READ32(dummy);
1140 READ_BUF(dummy);
1141 p += XDR_QUADLEN(dummy);
1142
1143 /* nii_date */
1144 READ_BUF(12);
1145 p += 3;
1146 }
1147 DECODE_TAIL;
Andy Adamson2db134e2009-04-03 08:27:55 +03001148}
1149
1150static __be32
1151nfsd4_decode_create_session(struct nfsd4_compoundargs *argp,
1152 struct nfsd4_create_session *sess)
1153{
Andy Adamsonec6b5d72009-04-03 08:28:28 +03001154 DECODE_HEAD;
1155
1156 u32 dummy;
1157 char *machine_name;
Mi Jinlong5a02ab72011-03-11 12:13:55 +08001158 int i;
Andy Adamsonec6b5d72009-04-03 08:28:28 +03001159 int nr_secflavs;
1160
1161 READ_BUF(16);
1162 COPYMEM(&sess->clientid, 8);
1163 READ32(sess->seqid);
1164 READ32(sess->flags);
1165
1166 /* Fore channel attrs */
1167 READ_BUF(28);
1168 READ32(dummy); /* headerpadsz is always 0 */
1169 READ32(sess->fore_channel.maxreq_sz);
1170 READ32(sess->fore_channel.maxresp_sz);
1171 READ32(sess->fore_channel.maxresp_cached);
1172 READ32(sess->fore_channel.maxops);
1173 READ32(sess->fore_channel.maxreqs);
1174 READ32(sess->fore_channel.nr_rdma_attrs);
1175 if (sess->fore_channel.nr_rdma_attrs == 1) {
1176 READ_BUF(4);
1177 READ32(sess->fore_channel.rdma_attrs);
1178 } else if (sess->fore_channel.nr_rdma_attrs > 1) {
1179 dprintk("Too many fore channel attr bitmaps!\n");
1180 goto xdr_error;
1181 }
1182
1183 /* Back channel attrs */
1184 READ_BUF(28);
1185 READ32(dummy); /* headerpadsz is always 0 */
1186 READ32(sess->back_channel.maxreq_sz);
1187 READ32(sess->back_channel.maxresp_sz);
1188 READ32(sess->back_channel.maxresp_cached);
1189 READ32(sess->back_channel.maxops);
1190 READ32(sess->back_channel.maxreqs);
1191 READ32(sess->back_channel.nr_rdma_attrs);
1192 if (sess->back_channel.nr_rdma_attrs == 1) {
1193 READ_BUF(4);
1194 READ32(sess->back_channel.rdma_attrs);
1195 } else if (sess->back_channel.nr_rdma_attrs > 1) {
1196 dprintk("Too many back channel attr bitmaps!\n");
1197 goto xdr_error;
1198 }
1199
1200 READ_BUF(8);
1201 READ32(sess->callback_prog);
1202
1203 /* callback_sec_params4 */
1204 READ32(nr_secflavs);
1205 for (i = 0; i < nr_secflavs; ++i) {
1206 READ_BUF(4);
1207 READ32(dummy);
1208 switch (dummy) {
1209 case RPC_AUTH_NULL:
1210 /* Nothing to read */
1211 break;
1212 case RPC_AUTH_UNIX:
1213 READ_BUF(8);
1214 /* stamp */
1215 READ32(dummy);
1216
1217 /* machine name */
1218 READ32(dummy);
1219 READ_BUF(dummy);
1220 SAVEMEM(machine_name, dummy);
1221
1222 /* uid, gid */
1223 READ_BUF(8);
1224 READ32(sess->uid);
1225 READ32(sess->gid);
1226
1227 /* more gids */
1228 READ_BUF(4);
1229 READ32(dummy);
1230 READ_BUF(dummy * 4);
Andy Adamsonec6b5d72009-04-03 08:28:28 +03001231 break;
1232 case RPC_AUTH_GSS:
1233 dprintk("RPC_AUTH_GSS callback secflavor "
1234 "not supported!\n");
1235 READ_BUF(8);
1236 /* gcbp_service */
1237 READ32(dummy);
1238 /* gcbp_handle_from_server */
1239 READ32(dummy);
1240 READ_BUF(dummy);
1241 p += XDR_QUADLEN(dummy);
1242 /* gcbp_handle_from_client */
1243 READ_BUF(4);
1244 READ32(dummy);
1245 READ_BUF(dummy);
Andy Adamsonec6b5d72009-04-03 08:28:28 +03001246 break;
1247 default:
1248 dprintk("Illegal callback secflavor\n");
1249 return nfserr_inval;
1250 }
1251 }
1252 DECODE_TAIL;
Andy Adamson2db134e2009-04-03 08:27:55 +03001253}
1254
1255static __be32
1256nfsd4_decode_destroy_session(struct nfsd4_compoundargs *argp,
1257 struct nfsd4_destroy_session *destroy_session)
1258{
Benny Halevye10e0cf2009-04-03 08:28:38 +03001259 DECODE_HEAD;
1260 READ_BUF(NFS4_MAX_SESSIONID_LEN);
1261 COPYMEM(destroy_session->sessionid.data, NFS4_MAX_SESSIONID_LEN);
1262
1263 DECODE_TAIL;
Andy Adamson2db134e2009-04-03 08:27:55 +03001264}
1265
1266static __be32
Bryan Schumakere1ca12d2011-07-13 11:04:21 -04001267nfsd4_decode_free_stateid(struct nfsd4_compoundargs *argp,
1268 struct nfsd4_free_stateid *free_stateid)
1269{
1270 DECODE_HEAD;
1271
1272 READ_BUF(sizeof(stateid_t));
1273 READ32(free_stateid->fr_stateid.si_generation);
1274 COPYMEM(&free_stateid->fr_stateid.si_opaque, sizeof(stateid_opaque_t));
1275
1276 DECODE_TAIL;
1277}
1278
1279static __be32
Andy Adamson2db134e2009-04-03 08:27:55 +03001280nfsd4_decode_sequence(struct nfsd4_compoundargs *argp,
1281 struct nfsd4_sequence *seq)
1282{
Benny Halevyb85d4c02009-04-03 08:28:08 +03001283 DECODE_HEAD;
1284
1285 READ_BUF(NFS4_MAX_SESSIONID_LEN + 16);
1286 COPYMEM(seq->sessionid.data, NFS4_MAX_SESSIONID_LEN);
1287 READ32(seq->seqid);
1288 READ32(seq->slotid);
1289 READ32(seq->maxslots);
1290 READ32(seq->cachethis);
1291
1292 DECODE_TAIL;
Andy Adamson2db134e2009-04-03 08:27:55 +03001293}
1294
Bryan Schumaker17456802011-07-13 10:50:48 -04001295static __be32
1296nfsd4_decode_test_stateid(struct nfsd4_compoundargs *argp, struct nfsd4_test_stateid *test_stateid)
1297{
1298 unsigned int nbytes;
1299 stateid_t si;
1300 int i;
1301 __be32 *p;
1302 __be32 status;
1303
1304 READ_BUF(4);
1305 test_stateid->ts_num_ids = ntohl(*p++);
1306
1307 nbytes = test_stateid->ts_num_ids * sizeof(stateid_t);
1308 if (nbytes > (u32)((char *)argp->end - (char *)argp->p))
1309 goto xdr_error;
1310
1311 test_stateid->ts_saved_args = argp;
1312 save_buf(argp, &test_stateid->ts_savedp);
1313
1314 for (i = 0; i < test_stateid->ts_num_ids; i++) {
1315 status = nfsd4_decode_stateid(argp, &si);
1316 if (status)
1317 return status;
1318 }
1319
1320 status = 0;
1321out:
1322 return status;
1323xdr_error:
1324 dprintk("NFSD: xdr error (%s:%d)\n", __FILE__, __LINE__);
1325 status = nfserr_bad_xdr;
1326 goto out;
1327}
1328
J. Bruce Fields4dc6ec02010-04-19 15:11:28 -04001329static __be32 nfsd4_decode_reclaim_complete(struct nfsd4_compoundargs *argp, struct nfsd4_reclaim_complete *rc)
1330{
1331 DECODE_HEAD;
1332
1333 READ_BUF(4);
1334 READ32(rc->rca_one_fs);
1335
1336 DECODE_TAIL;
1337}
1338
Andy Adamson2db134e2009-04-03 08:27:55 +03001339static __be32
Benny Halevy347e0ad2008-07-02 11:13:41 +03001340nfsd4_decode_noop(struct nfsd4_compoundargs *argp, void *p)
1341{
1342 return nfs_ok;
1343}
1344
Benny Halevy3c375c62008-07-02 11:14:01 +03001345static __be32
1346nfsd4_decode_notsupp(struct nfsd4_compoundargs *argp, void *p)
1347{
Benny Halevy1e685ec2009-03-04 23:06:06 +02001348 return nfserr_notsupp;
Benny Halevy3c375c62008-07-02 11:14:01 +03001349}
1350
Benny Halevy347e0ad2008-07-02 11:13:41 +03001351typedef __be32(*nfsd4_dec)(struct nfsd4_compoundargs *argp, void *);
1352
1353static nfsd4_dec nfsd4_dec_ops[] = {
J. Bruce Fieldsad1060c2008-07-18 15:04:16 -04001354 [OP_ACCESS] = (nfsd4_dec)nfsd4_decode_access,
1355 [OP_CLOSE] = (nfsd4_dec)nfsd4_decode_close,
1356 [OP_COMMIT] = (nfsd4_dec)nfsd4_decode_commit,
1357 [OP_CREATE] = (nfsd4_dec)nfsd4_decode_create,
1358 [OP_DELEGPURGE] = (nfsd4_dec)nfsd4_decode_notsupp,
1359 [OP_DELEGRETURN] = (nfsd4_dec)nfsd4_decode_delegreturn,
1360 [OP_GETATTR] = (nfsd4_dec)nfsd4_decode_getattr,
1361 [OP_GETFH] = (nfsd4_dec)nfsd4_decode_noop,
1362 [OP_LINK] = (nfsd4_dec)nfsd4_decode_link,
1363 [OP_LOCK] = (nfsd4_dec)nfsd4_decode_lock,
1364 [OP_LOCKT] = (nfsd4_dec)nfsd4_decode_lockt,
1365 [OP_LOCKU] = (nfsd4_dec)nfsd4_decode_locku,
1366 [OP_LOOKUP] = (nfsd4_dec)nfsd4_decode_lookup,
1367 [OP_LOOKUPP] = (nfsd4_dec)nfsd4_decode_noop,
1368 [OP_NVERIFY] = (nfsd4_dec)nfsd4_decode_verify,
1369 [OP_OPEN] = (nfsd4_dec)nfsd4_decode_open,
1370 [OP_OPENATTR] = (nfsd4_dec)nfsd4_decode_notsupp,
1371 [OP_OPEN_CONFIRM] = (nfsd4_dec)nfsd4_decode_open_confirm,
1372 [OP_OPEN_DOWNGRADE] = (nfsd4_dec)nfsd4_decode_open_downgrade,
1373 [OP_PUTFH] = (nfsd4_dec)nfsd4_decode_putfh,
J. Bruce Fieldsa1c8c4d2009-03-09 12:17:29 -04001374 [OP_PUTPUBFH] = (nfsd4_dec)nfsd4_decode_noop,
J. Bruce Fieldsad1060c2008-07-18 15:04:16 -04001375 [OP_PUTROOTFH] = (nfsd4_dec)nfsd4_decode_noop,
1376 [OP_READ] = (nfsd4_dec)nfsd4_decode_read,
1377 [OP_READDIR] = (nfsd4_dec)nfsd4_decode_readdir,
1378 [OP_READLINK] = (nfsd4_dec)nfsd4_decode_noop,
1379 [OP_REMOVE] = (nfsd4_dec)nfsd4_decode_remove,
1380 [OP_RENAME] = (nfsd4_dec)nfsd4_decode_rename,
1381 [OP_RENEW] = (nfsd4_dec)nfsd4_decode_renew,
1382 [OP_RESTOREFH] = (nfsd4_dec)nfsd4_decode_noop,
1383 [OP_SAVEFH] = (nfsd4_dec)nfsd4_decode_noop,
1384 [OP_SECINFO] = (nfsd4_dec)nfsd4_decode_secinfo,
1385 [OP_SETATTR] = (nfsd4_dec)nfsd4_decode_setattr,
1386 [OP_SETCLIENTID] = (nfsd4_dec)nfsd4_decode_setclientid,
1387 [OP_SETCLIENTID_CONFIRM] = (nfsd4_dec)nfsd4_decode_setclientid_confirm,
1388 [OP_VERIFY] = (nfsd4_dec)nfsd4_decode_verify,
1389 [OP_WRITE] = (nfsd4_dec)nfsd4_decode_write,
1390 [OP_RELEASE_LOCKOWNER] = (nfsd4_dec)nfsd4_decode_release_lockowner,
Benny Halevy347e0ad2008-07-02 11:13:41 +03001391};
1392
Andy Adamson2db134e2009-04-03 08:27:55 +03001393static nfsd4_dec nfsd41_dec_ops[] = {
Randy Dunlap9064caa2009-04-28 16:48:25 -07001394 [OP_ACCESS] = (nfsd4_dec)nfsd4_decode_access,
1395 [OP_CLOSE] = (nfsd4_dec)nfsd4_decode_close,
1396 [OP_COMMIT] = (nfsd4_dec)nfsd4_decode_commit,
1397 [OP_CREATE] = (nfsd4_dec)nfsd4_decode_create,
1398 [OP_DELEGPURGE] = (nfsd4_dec)nfsd4_decode_notsupp,
1399 [OP_DELEGRETURN] = (nfsd4_dec)nfsd4_decode_delegreturn,
1400 [OP_GETATTR] = (nfsd4_dec)nfsd4_decode_getattr,
1401 [OP_GETFH] = (nfsd4_dec)nfsd4_decode_noop,
1402 [OP_LINK] = (nfsd4_dec)nfsd4_decode_link,
1403 [OP_LOCK] = (nfsd4_dec)nfsd4_decode_lock,
1404 [OP_LOCKT] = (nfsd4_dec)nfsd4_decode_lockt,
1405 [OP_LOCKU] = (nfsd4_dec)nfsd4_decode_locku,
1406 [OP_LOOKUP] = (nfsd4_dec)nfsd4_decode_lookup,
1407 [OP_LOOKUPP] = (nfsd4_dec)nfsd4_decode_noop,
1408 [OP_NVERIFY] = (nfsd4_dec)nfsd4_decode_verify,
1409 [OP_OPEN] = (nfsd4_dec)nfsd4_decode_open,
1410 [OP_OPENATTR] = (nfsd4_dec)nfsd4_decode_notsupp,
1411 [OP_OPEN_CONFIRM] = (nfsd4_dec)nfsd4_decode_notsupp,
1412 [OP_OPEN_DOWNGRADE] = (nfsd4_dec)nfsd4_decode_open_downgrade,
1413 [OP_PUTFH] = (nfsd4_dec)nfsd4_decode_putfh,
1414 [OP_PUTPUBFH] = (nfsd4_dec)nfsd4_decode_notsupp,
1415 [OP_PUTROOTFH] = (nfsd4_dec)nfsd4_decode_noop,
1416 [OP_READ] = (nfsd4_dec)nfsd4_decode_read,
1417 [OP_READDIR] = (nfsd4_dec)nfsd4_decode_readdir,
1418 [OP_READLINK] = (nfsd4_dec)nfsd4_decode_noop,
1419 [OP_REMOVE] = (nfsd4_dec)nfsd4_decode_remove,
1420 [OP_RENAME] = (nfsd4_dec)nfsd4_decode_rename,
1421 [OP_RENEW] = (nfsd4_dec)nfsd4_decode_notsupp,
1422 [OP_RESTOREFH] = (nfsd4_dec)nfsd4_decode_noop,
1423 [OP_SAVEFH] = (nfsd4_dec)nfsd4_decode_noop,
1424 [OP_SECINFO] = (nfsd4_dec)nfsd4_decode_secinfo,
1425 [OP_SETATTR] = (nfsd4_dec)nfsd4_decode_setattr,
1426 [OP_SETCLIENTID] = (nfsd4_dec)nfsd4_decode_notsupp,
1427 [OP_SETCLIENTID_CONFIRM]= (nfsd4_dec)nfsd4_decode_notsupp,
1428 [OP_VERIFY] = (nfsd4_dec)nfsd4_decode_verify,
1429 [OP_WRITE] = (nfsd4_dec)nfsd4_decode_write,
1430 [OP_RELEASE_LOCKOWNER] = (nfsd4_dec)nfsd4_decode_notsupp,
Andy Adamson2db134e2009-04-03 08:27:55 +03001431
1432 /* new operations for NFSv4.1 */
Randy Dunlap9064caa2009-04-28 16:48:25 -07001433 [OP_BACKCHANNEL_CTL] = (nfsd4_dec)nfsd4_decode_notsupp,
J. Bruce Fields1d1bc8f2010-10-04 23:12:59 -04001434 [OP_BIND_CONN_TO_SESSION]= (nfsd4_dec)nfsd4_decode_bind_conn_to_session,
Randy Dunlap9064caa2009-04-28 16:48:25 -07001435 [OP_EXCHANGE_ID] = (nfsd4_dec)nfsd4_decode_exchange_id,
1436 [OP_CREATE_SESSION] = (nfsd4_dec)nfsd4_decode_create_session,
1437 [OP_DESTROY_SESSION] = (nfsd4_dec)nfsd4_decode_destroy_session,
Bryan Schumakere1ca12d2011-07-13 11:04:21 -04001438 [OP_FREE_STATEID] = (nfsd4_dec)nfsd4_decode_free_stateid,
Randy Dunlap9064caa2009-04-28 16:48:25 -07001439 [OP_GET_DIR_DELEGATION] = (nfsd4_dec)nfsd4_decode_notsupp,
1440 [OP_GETDEVICEINFO] = (nfsd4_dec)nfsd4_decode_notsupp,
1441 [OP_GETDEVICELIST] = (nfsd4_dec)nfsd4_decode_notsupp,
1442 [OP_LAYOUTCOMMIT] = (nfsd4_dec)nfsd4_decode_notsupp,
1443 [OP_LAYOUTGET] = (nfsd4_dec)nfsd4_decode_notsupp,
1444 [OP_LAYOUTRETURN] = (nfsd4_dec)nfsd4_decode_notsupp,
J. Bruce Fields04f4ad12010-12-16 09:51:13 -05001445 [OP_SECINFO_NO_NAME] = (nfsd4_dec)nfsd4_decode_secinfo_no_name,
Randy Dunlap9064caa2009-04-28 16:48:25 -07001446 [OP_SEQUENCE] = (nfsd4_dec)nfsd4_decode_sequence,
1447 [OP_SET_SSV] = (nfsd4_dec)nfsd4_decode_notsupp,
Bryan Schumaker17456802011-07-13 10:50:48 -04001448 [OP_TEST_STATEID] = (nfsd4_dec)nfsd4_decode_test_stateid,
Randy Dunlap9064caa2009-04-28 16:48:25 -07001449 [OP_WANT_DELEGATION] = (nfsd4_dec)nfsd4_decode_notsupp,
1450 [OP_DESTROY_CLIENTID] = (nfsd4_dec)nfsd4_decode_notsupp,
J. Bruce Fields4dc6ec02010-04-19 15:11:28 -04001451 [OP_RECLAIM_COMPLETE] = (nfsd4_dec)nfsd4_decode_reclaim_complete,
Andy Adamson2db134e2009-04-03 08:27:55 +03001452};
1453
Benny Halevyf2feb962008-07-02 11:14:22 +03001454struct nfsd4_minorversion_ops {
1455 nfsd4_dec *decoders;
1456 int nops;
1457};
1458
1459static struct nfsd4_minorversion_ops nfsd4_minorversion[] = {
J. Bruce Fieldsad1060c2008-07-18 15:04:16 -04001460 [0] = { nfsd4_dec_ops, ARRAY_SIZE(nfsd4_dec_ops) },
Andy Adamson2db134e2009-04-03 08:27:55 +03001461 [1] = { nfsd41_dec_ops, ARRAY_SIZE(nfsd41_dec_ops) },
Benny Halevyf2feb962008-07-02 11:14:22 +03001462};
1463
Benny Halevy347e0ad2008-07-02 11:13:41 +03001464static __be32
Linus Torvalds1da177e2005-04-16 15:20:36 -07001465nfsd4_decode_compound(struct nfsd4_compoundargs *argp)
1466{
1467 DECODE_HEAD;
1468 struct nfsd4_op *op;
Benny Halevyf2feb962008-07-02 11:14:22 +03001469 struct nfsd4_minorversion_ops *ops;
J. Bruce Fields10910062011-01-24 12:11:02 -05001470 bool cachethis = false;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001471 int i;
1472
1473 /*
1474 * XXX: According to spec, we should check the tag
1475 * for UTF-8 compliance. I'm postponing this for
1476 * now because it seems that some clients do use
1477 * binary tags.
1478 */
1479 READ_BUF(4);
1480 READ32(argp->taglen);
1481 READ_BUF(argp->taglen + 8);
1482 SAVEMEM(argp->tag, argp->taglen);
1483 READ32(argp->minorversion);
1484 READ32(argp->opcnt);
1485
1486 if (argp->taglen > NFSD4_MAX_TAGLEN)
1487 goto xdr_error;
1488 if (argp->opcnt > 100)
1489 goto xdr_error;
1490
Tobias Klausere8c96f82006-03-24 03:15:34 -08001491 if (argp->opcnt > ARRAY_SIZE(argp->iops)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001492 argp->ops = kmalloc(argp->opcnt * sizeof(*argp->ops), GFP_KERNEL);
1493 if (!argp->ops) {
1494 argp->ops = argp->iops;
Chuck Lever817cb9d2007-09-11 18:01:20 -04001495 dprintk("nfsd: couldn't allocate room for COMPOUND\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001496 goto xdr_error;
1497 }
1498 }
1499
Benny Halevyf2feb962008-07-02 11:14:22 +03001500 if (argp->minorversion >= ARRAY_SIZE(nfsd4_minorversion))
Benny Halevy30cff1f2008-07-02 11:13:18 +03001501 argp->opcnt = 0;
1502
Benny Halevyf2feb962008-07-02 11:14:22 +03001503 ops = &nfsd4_minorversion[argp->minorversion];
Linus Torvalds1da177e2005-04-16 15:20:36 -07001504 for (i = 0; i < argp->opcnt; i++) {
1505 op = &argp->ops[i];
1506 op->replay = NULL;
1507
1508 /*
1509 * We can't use READ_BUF() here because we need to handle
1510 * a missing opcode as an OP_WRITE + 1. So we need to check
1511 * to see if we're truly at the end of our buffer or if there
1512 * is another page we need to flip to.
1513 */
1514
1515 if (argp->p == argp->end) {
1516 if (argp->pagelen < 4) {
1517 /* There isn't an opcode still on the wire */
1518 op->opnum = OP_WRITE + 1;
1519 op->status = nfserr_bad_xdr;
1520 argp->opcnt = i+1;
1521 break;
1522 }
1523
1524 /*
1525 * False alarm. We just hit a page boundary, but there
1526 * is still data available. Move pointer across page
1527 * boundary. *snip from READ_BUF*
1528 */
1529 argp->p = page_address(argp->pagelist[0]);
1530 argp->pagelist++;
1531 if (argp->pagelen < PAGE_SIZE) {
Neil Brown2bc3c112010-04-20 12:16:52 +10001532 argp->end = argp->p + (argp->pagelen>>2);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001533 argp->pagelen = 0;
1534 } else {
Neil Brown2bc3c112010-04-20 12:16:52 +10001535 argp->end = argp->p + (PAGE_SIZE>>2);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001536 argp->pagelen -= PAGE_SIZE;
1537 }
1538 }
1539 op->opnum = ntohl(*argp->p++);
1540
Ricardo Labiagade3cab72009-12-11 20:03:27 -08001541 if (op->opnum >= FIRST_NFS4_OP && op->opnum <= LAST_NFS4_OP)
Benny Halevyf2feb962008-07-02 11:14:22 +03001542 op->status = ops->decoders[op->opnum](argp, &op->u);
Benny Halevy347e0ad2008-07-02 11:13:41 +03001543 else {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001544 op->opnum = OP_ILLEGAL;
1545 op->status = nfserr_op_illegal;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001546 }
1547
1548 if (op->status) {
1549 argp->opcnt = i+1;
1550 break;
1551 }
J. Bruce Fields10910062011-01-24 12:11:02 -05001552 /*
1553 * We'll try to cache the result in the DRC if any one
1554 * op in the compound wants to be cached:
1555 */
1556 cachethis |= nfsd4_cache_this_op(op);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001557 }
J. Bruce Fields10910062011-01-24 12:11:02 -05001558 /* Sessions make the DRC unnecessary: */
1559 if (argp->minorversion)
1560 cachethis = false;
1561 argp->rqstp->rq_cachetype = cachethis ? RC_REPLBUFF : RC_NOCACHE;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001562
1563 DECODE_TAIL;
1564}
Linus Torvalds1da177e2005-04-16 15:20:36 -07001565
Linus Torvalds1da177e2005-04-16 15:20:36 -07001566#define WRITE32(n) *p++ = htonl(n)
1567#define WRITE64(n) do { \
1568 *p++ = htonl((u32)((n) >> 32)); \
1569 *p++ = htonl((u32)(n)); \
1570} while (0)
Harvey Harrison5108b272008-07-17 21:33:04 -07001571#define WRITEMEM(ptr,nbytes) do { if (nbytes > 0) { \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001572 *(p + XDR_QUADLEN(nbytes) -1) = 0; \
1573 memcpy(p, ptr, nbytes); \
1574 p += XDR_QUADLEN(nbytes); \
Harvey Harrison5108b272008-07-17 21:33:04 -07001575}} while (0)
J. Bruce Fieldsc654b8a2009-04-16 17:33:25 -04001576
1577static void write32(__be32 **p, u32 n)
1578{
1579 *(*p)++ = n;
1580}
1581
1582static void write64(__be32 **p, u64 n)
1583{
1584 write32(p, (u32)(n >> 32));
1585 write32(p, (u32)n);
1586}
1587
1588static void write_change(__be32 **p, struct kstat *stat, struct inode *inode)
1589{
1590 if (IS_I_VERSION(inode)) {
1591 write64(p, inode->i_version);
1592 } else {
1593 write32(p, stat->ctime.tv_sec);
1594 write32(p, stat->ctime.tv_nsec);
1595 }
1596}
1597
1598static void write_cinfo(__be32 **p, struct nfsd4_change_info *c)
1599{
1600 write32(p, c->atomic);
1601 if (c->change_supported) {
1602 write64(p, c->before_change);
1603 write64(p, c->after_change);
1604 } else {
1605 write32(p, c->before_ctime_sec);
1606 write32(p, c->before_ctime_nsec);
1607 write32(p, c->after_ctime_sec);
1608 write32(p, c->after_ctime_nsec);
1609 }
1610}
Linus Torvalds1da177e2005-04-16 15:20:36 -07001611
1612#define RESERVE_SPACE(nbytes) do { \
1613 p = resp->p; \
1614 BUG_ON(p + XDR_QUADLEN(nbytes) > resp->end); \
1615} while (0)
1616#define ADJUST_ARGS() resp->p = p
1617
1618/*
1619 * Header routine to setup seqid operation replay cache
1620 */
1621#define ENCODE_SEQID_OP_HEAD \
Al Viro2ebbc012006-10-19 23:28:58 -07001622 __be32 *save; \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001623 \
1624 save = resp->p;
1625
1626/*
NeilBrown7fb64ce2005-07-07 17:59:20 -07001627 * Routine for encoding the result of a "seqid-mutating" NFSv4 operation. This
1628 * is where sequence id's are incremented, and the replay cache is filled.
1629 * Note that we increment sequence id's here, at the last moment, so we're sure
1630 * we know whether the error to be returned is a sequence id mutating error.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001631 */
1632
J. Bruce Fieldsf3e42232011-08-24 12:27:31 -04001633static void encode_seqid_op_tail(struct nfsd4_compoundres *resp, __be32 *save, __be32 nfserr)
1634{
1635 struct nfs4_stateowner *stateowner = resp->cstate.replay_owner;
1636
1637 if (seqid_mutating_err(ntohl(nfserr)) && stateowner) {
1638 stateowner->so_seqid++;
1639 stateowner->so_replay.rp_status = nfserr;
1640 stateowner->so_replay.rp_buflen =
1641 (char *)resp->p - (char *)save;
1642 memcpy(stateowner->so_replay.rp_buf, save,
1643 stateowner->so_replay.rp_buflen);
1644 }
1645}
Linus Torvalds1da177e2005-04-16 15:20:36 -07001646
J.Bruce Fields81c3f412006-10-04 02:16:19 -07001647/* Encode as an array of strings the string given with components
Daniel Mack3ad2f3f2010-02-03 08:01:28 +08001648 * separated @sep.
J.Bruce Fields81c3f412006-10-04 02:16:19 -07001649 */
Al Virob37ad282006-10-19 23:28:59 -07001650static __be32 nfsd4_encode_components(char sep, char *components,
Al Viro2ebbc012006-10-19 23:28:58 -07001651 __be32 **pp, int *buflen)
J.Bruce Fields81c3f412006-10-04 02:16:19 -07001652{
Al Viro2ebbc012006-10-19 23:28:58 -07001653 __be32 *p = *pp;
1654 __be32 *countp = p;
J.Bruce Fields81c3f412006-10-04 02:16:19 -07001655 int strlen, count=0;
1656 char *str, *end;
1657
1658 dprintk("nfsd4_encode_components(%s)\n", components);
1659 if ((*buflen -= 4) < 0)
1660 return nfserr_resource;
1661 WRITE32(0); /* We will fill this in with @count later */
1662 end = str = components;
1663 while (*end) {
1664 for (; *end && (*end != sep); end++)
1665 ; /* Point to end of component */
1666 strlen = end - str;
1667 if (strlen) {
1668 if ((*buflen -= ((XDR_QUADLEN(strlen) << 2) + 4)) < 0)
1669 return nfserr_resource;
1670 WRITE32(strlen);
1671 WRITEMEM(str, strlen);
1672 count++;
1673 }
1674 else
1675 end++;
1676 str = end;
1677 }
1678 *pp = p;
1679 p = countp;
1680 WRITE32(count);
1681 return 0;
1682}
1683
1684/*
1685 * encode a location element of a fs_locations structure
1686 */
Al Virob37ad282006-10-19 23:28:59 -07001687static __be32 nfsd4_encode_fs_location4(struct nfsd4_fs_location *location,
Al Viro2ebbc012006-10-19 23:28:58 -07001688 __be32 **pp, int *buflen)
J.Bruce Fields81c3f412006-10-04 02:16:19 -07001689{
Al Virob37ad282006-10-19 23:28:59 -07001690 __be32 status;
Al Viro2ebbc012006-10-19 23:28:58 -07001691 __be32 *p = *pp;
J.Bruce Fields81c3f412006-10-04 02:16:19 -07001692
1693 status = nfsd4_encode_components(':', location->hosts, &p, buflen);
1694 if (status)
1695 return status;
1696 status = nfsd4_encode_components('/', location->path, &p, buflen);
1697 if (status)
1698 return status;
1699 *pp = p;
1700 return 0;
1701}
1702
1703/*
1704 * Return the path to an export point in the pseudo filesystem namespace
1705 * Returned string is safe to use as long as the caller holds a reference
1706 * to @exp.
1707 */
Al Virob37ad282006-10-19 23:28:59 -07001708static char *nfsd4_path(struct svc_rqst *rqstp, struct svc_export *exp, __be32 *stat)
J.Bruce Fields81c3f412006-10-04 02:16:19 -07001709{
1710 struct svc_fh tmp_fh;
Trond Myklebust2671a4b2009-09-02 16:48:32 -04001711 char *path = NULL, *rootpath;
1712 size_t rootlen;
J.Bruce Fields81c3f412006-10-04 02:16:19 -07001713
1714 fh_init(&tmp_fh, NFS4_FHSIZE);
J. Bruce Fieldsdf547ef2007-07-17 04:04:43 -07001715 *stat = exp_pseudoroot(rqstp, &tmp_fh);
Al Virocc45f012006-10-19 23:28:44 -07001716 if (*stat)
1717 return NULL;
Jan Blunck54775492008-02-14 19:38:39 -08001718 rootpath = tmp_fh.fh_export->ex_pathname;
J.Bruce Fields81c3f412006-10-04 02:16:19 -07001719
Jan Blunck54775492008-02-14 19:38:39 -08001720 path = exp->ex_pathname;
J.Bruce Fields81c3f412006-10-04 02:16:19 -07001721
Trond Myklebust2671a4b2009-09-02 16:48:32 -04001722 rootlen = strlen(rootpath);
1723 if (strncmp(path, rootpath, rootlen)) {
Chuck Lever817cb9d2007-09-11 18:01:20 -04001724 dprintk("nfsd: fs_locations failed;"
J.Bruce Fields81c3f412006-10-04 02:16:19 -07001725 "%s is not contained in %s\n", path, rootpath);
Al Virocc45f012006-10-19 23:28:44 -07001726 *stat = nfserr_notsupp;
Trond Myklebust2671a4b2009-09-02 16:48:32 -04001727 path = NULL;
1728 goto out;
J.Bruce Fields81c3f412006-10-04 02:16:19 -07001729 }
Trond Myklebust2671a4b2009-09-02 16:48:32 -04001730 path += rootlen;
1731out:
1732 fh_put(&tmp_fh);
1733 return path;
J.Bruce Fields81c3f412006-10-04 02:16:19 -07001734}
1735
1736/*
1737 * encode a fs_locations structure
1738 */
Al Virob37ad282006-10-19 23:28:59 -07001739static __be32 nfsd4_encode_fs_locations(struct svc_rqst *rqstp,
J.Bruce Fields81c3f412006-10-04 02:16:19 -07001740 struct svc_export *exp,
Al Viro2ebbc012006-10-19 23:28:58 -07001741 __be32 **pp, int *buflen)
J.Bruce Fields81c3f412006-10-04 02:16:19 -07001742{
Al Virob37ad282006-10-19 23:28:59 -07001743 __be32 status;
Al Virocc45f012006-10-19 23:28:44 -07001744 int i;
Al Viro2ebbc012006-10-19 23:28:58 -07001745 __be32 *p = *pp;
J.Bruce Fields81c3f412006-10-04 02:16:19 -07001746 struct nfsd4_fs_locations *fslocs = &exp->ex_fslocs;
Al Virocc45f012006-10-19 23:28:44 -07001747 char *root = nfsd4_path(rqstp, exp, &status);
J.Bruce Fields81c3f412006-10-04 02:16:19 -07001748
Al Virocc45f012006-10-19 23:28:44 -07001749 if (status)
1750 return status;
J.Bruce Fields81c3f412006-10-04 02:16:19 -07001751 status = nfsd4_encode_components('/', root, &p, buflen);
1752 if (status)
1753 return status;
1754 if ((*buflen -= 4) < 0)
1755 return nfserr_resource;
1756 WRITE32(fslocs->locations_count);
1757 for (i=0; i<fslocs->locations_count; i++) {
1758 status = nfsd4_encode_fs_location4(&fslocs->locations[i],
1759 &p, buflen);
1760 if (status)
1761 return status;
1762 }
1763 *pp = p;
1764 return 0;
1765}
Linus Torvalds1da177e2005-04-16 15:20:36 -07001766
J. Bruce Fields3d2544b2011-08-15 11:49:30 -04001767static u32 nfs4_file_type(umode_t mode)
1768{
1769 switch (mode & S_IFMT) {
1770 case S_IFIFO: return NF4FIFO;
1771 case S_IFCHR: return NF4CHR;
1772 case S_IFDIR: return NF4DIR;
1773 case S_IFBLK: return NF4BLK;
1774 case S_IFLNK: return NF4LNK;
1775 case S_IFREG: return NF4REG;
1776 case S_IFSOCK: return NF4SOCK;
1777 default: return NF4BAD;
1778 };
1779}
Linus Torvalds1da177e2005-04-16 15:20:36 -07001780
Al Virob37ad282006-10-19 23:28:59 -07001781static __be32
Linus Torvalds1da177e2005-04-16 15:20:36 -07001782nfsd4_encode_name(struct svc_rqst *rqstp, int whotype, uid_t id, int group,
Al Viro2ebbc012006-10-19 23:28:58 -07001783 __be32 **p, int *buflen)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001784{
1785 int status;
1786
1787 if (*buflen < (XDR_QUADLEN(IDMAP_NAMESZ) << 2) + 4)
1788 return nfserr_resource;
1789 if (whotype != NFS4_ACL_WHO_NAMED)
1790 status = nfs4_acl_write_who(whotype, (u8 *)(*p + 1));
1791 else if (group)
1792 status = nfsd_map_gid_to_name(rqstp, id, (u8 *)(*p + 1));
1793 else
1794 status = nfsd_map_uid_to_name(rqstp, id, (u8 *)(*p + 1));
1795 if (status < 0)
1796 return nfserrno(status);
1797 *p = xdr_encode_opaque(*p, NULL, status);
1798 *buflen -= (XDR_QUADLEN(status) << 2) + 4;
1799 BUG_ON(*buflen < 0);
1800 return 0;
1801}
1802
Al Virob37ad282006-10-19 23:28:59 -07001803static inline __be32
Al Viro2ebbc012006-10-19 23:28:58 -07001804nfsd4_encode_user(struct svc_rqst *rqstp, uid_t uid, __be32 **p, int *buflen)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001805{
1806 return nfsd4_encode_name(rqstp, NFS4_ACL_WHO_NAMED, uid, 0, p, buflen);
1807}
1808
Al Virob37ad282006-10-19 23:28:59 -07001809static inline __be32
Al Viro2ebbc012006-10-19 23:28:58 -07001810nfsd4_encode_group(struct svc_rqst *rqstp, uid_t gid, __be32 **p, int *buflen)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001811{
1812 return nfsd4_encode_name(rqstp, NFS4_ACL_WHO_NAMED, gid, 1, p, buflen);
1813}
1814
Al Virob37ad282006-10-19 23:28:59 -07001815static inline __be32
Linus Torvalds1da177e2005-04-16 15:20:36 -07001816nfsd4_encode_aclname(struct svc_rqst *rqstp, int whotype, uid_t id, int group,
Al Viro2ebbc012006-10-19 23:28:58 -07001817 __be32 **p, int *buflen)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001818{
1819 return nfsd4_encode_name(rqstp, whotype, id, group, p, buflen);
1820}
1821
J.Bruce Fields42ca0992006-10-04 02:16:20 -07001822#define WORD0_ABSENT_FS_ATTRS (FATTR4_WORD0_FS_LOCATIONS | FATTR4_WORD0_FSID | \
1823 FATTR4_WORD0_RDATTR_ERROR)
1824#define WORD1_ABSENT_FS_ATTRS FATTR4_WORD1_MOUNTED_ON_FILEID
1825
Al Virob37ad282006-10-19 23:28:59 -07001826static __be32 fattr_handle_absent_fs(u32 *bmval0, u32 *bmval1, u32 *rdattr_err)
J.Bruce Fields42ca0992006-10-04 02:16:20 -07001827{
1828 /* As per referral draft: */
1829 if (*bmval0 & ~WORD0_ABSENT_FS_ATTRS ||
1830 *bmval1 & ~WORD1_ABSENT_FS_ATTRS) {
1831 if (*bmval0 & FATTR4_WORD0_RDATTR_ERROR ||
1832 *bmval0 & FATTR4_WORD0_FS_LOCATIONS)
1833 *rdattr_err = NFSERR_MOVED;
1834 else
1835 return nfserr_moved;
1836 }
1837 *bmval0 &= WORD0_ABSENT_FS_ATTRS;
1838 *bmval1 &= WORD1_ABSENT_FS_ATTRS;
1839 return 0;
1840}
Linus Torvalds1da177e2005-04-16 15:20:36 -07001841
1842/*
1843 * Note: @fhp can be NULL; in this case, we might have to compose the filehandle
1844 * ourselves.
1845 *
1846 * @countp is the buffer size in _words_; upon successful return this becomes
1847 * replaced with the number of words written.
1848 */
Al Virob37ad282006-10-19 23:28:59 -07001849__be32
Linus Torvalds1da177e2005-04-16 15:20:36 -07001850nfsd4_encode_fattr(struct svc_fh *fhp, struct svc_export *exp,
Al Viro2ebbc012006-10-19 23:28:58 -07001851 struct dentry *dentry, __be32 *buffer, int *countp, u32 *bmval,
Frank Filz406a7ea2007-11-27 11:34:05 -08001852 struct svc_rqst *rqstp, int ignore_crossmnt)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001853{
1854 u32 bmval0 = bmval[0];
1855 u32 bmval1 = bmval[1];
Andy Adamson7e705702009-04-03 08:29:11 +03001856 u32 bmval2 = bmval[2];
Linus Torvalds1da177e2005-04-16 15:20:36 -07001857 struct kstat stat;
1858 struct svc_fh tempfh;
1859 struct kstatfs statfs;
1860 int buflen = *countp << 2;
Al Viro2ebbc012006-10-19 23:28:58 -07001861 __be32 *attrlenp;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001862 u32 dummy;
1863 u64 dummy64;
J.Bruce Fields42ca0992006-10-04 02:16:20 -07001864 u32 rdattr_err = 0;
Al Viro2ebbc012006-10-19 23:28:58 -07001865 __be32 *p = buffer;
Al Virob37ad282006-10-19 23:28:59 -07001866 __be32 status;
Al Virob8dd7b92006-10-19 23:29:01 -07001867 int err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001868 int aclsupport = 0;
1869 struct nfs4_acl *acl = NULL;
Andy Adamson7e705702009-04-03 08:29:11 +03001870 struct nfsd4_compoundres *resp = rqstp->rq_resp;
1871 u32 minorversion = resp->cstate.minorversion;
Christoph Hellwigebabe9a2010-07-07 18:53:11 +02001872 struct path path = {
1873 .mnt = exp->ex_path.mnt,
1874 .dentry = dentry,
1875 };
Linus Torvalds1da177e2005-04-16 15:20:36 -07001876
1877 BUG_ON(bmval1 & NFSD_WRITEONLY_ATTRS_WORD1);
Andy Adamson7e705702009-04-03 08:29:11 +03001878 BUG_ON(bmval0 & ~nfsd_suppattrs0(minorversion));
1879 BUG_ON(bmval1 & ~nfsd_suppattrs1(minorversion));
1880 BUG_ON(bmval2 & ~nfsd_suppattrs2(minorversion));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001881
J.Bruce Fields42ca0992006-10-04 02:16:20 -07001882 if (exp->ex_fslocs.migrated) {
Andy Adamson7e705702009-04-03 08:29:11 +03001883 BUG_ON(bmval[2]);
J.Bruce Fields42ca0992006-10-04 02:16:20 -07001884 status = fattr_handle_absent_fs(&bmval0, &bmval1, &rdattr_err);
1885 if (status)
1886 goto out;
1887 }
1888
Jan Blunck54775492008-02-14 19:38:39 -08001889 err = vfs_getattr(exp->ex_path.mnt, dentry, &stat);
Al Virob8dd7b92006-10-19 23:29:01 -07001890 if (err)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001891 goto out_nfserr;
J. Bruce Fieldsa16e92e2007-09-28 16:45:51 -04001892 if ((bmval0 & (FATTR4_WORD0_FILES_FREE | FATTR4_WORD0_FILES_TOTAL |
1893 FATTR4_WORD0_MAXNAME)) ||
Linus Torvalds1da177e2005-04-16 15:20:36 -07001894 (bmval1 & (FATTR4_WORD1_SPACE_AVAIL | FATTR4_WORD1_SPACE_FREE |
1895 FATTR4_WORD1_SPACE_TOTAL))) {
Christoph Hellwigebabe9a2010-07-07 18:53:11 +02001896 err = vfs_statfs(&path, &statfs);
Al Virob8dd7b92006-10-19 23:29:01 -07001897 if (err)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001898 goto out_nfserr;
1899 }
1900 if ((bmval0 & (FATTR4_WORD0_FILEHANDLE | FATTR4_WORD0_FSID)) && !fhp) {
1901 fh_init(&tempfh, NFS4_FHSIZE);
1902 status = fh_compose(&tempfh, exp, dentry, NULL);
1903 if (status)
1904 goto out;
1905 fhp = &tempfh;
1906 }
1907 if (bmval0 & (FATTR4_WORD0_ACL | FATTR4_WORD0_ACLSUPPORT
1908 | FATTR4_WORD0_SUPPORTED_ATTRS)) {
Al Virob8dd7b92006-10-19 23:29:01 -07001909 err = nfsd4_get_nfs4_acl(rqstp, dentry, &acl);
1910 aclsupport = (err == 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001911 if (bmval0 & FATTR4_WORD0_ACL) {
Al Virob8dd7b92006-10-19 23:29:01 -07001912 if (err == -EOPNOTSUPP)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001913 bmval0 &= ~FATTR4_WORD0_ACL;
Al Virob8dd7b92006-10-19 23:29:01 -07001914 else if (err == -EINVAL) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001915 status = nfserr_attrnotsupp;
1916 goto out;
Al Virob8dd7b92006-10-19 23:29:01 -07001917 } else if (err != 0)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001918 goto out_nfserr;
1919 }
1920 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001921
Benny Halevy2b44f1b2010-09-30 20:47:46 +02001922 if (bmval2) {
1923 if ((buflen -= 16) < 0)
1924 goto out_resource;
Andy Adamson7e705702009-04-03 08:29:11 +03001925 WRITE32(3);
1926 WRITE32(bmval0);
1927 WRITE32(bmval1);
1928 WRITE32(bmval2);
Benny Halevy2b44f1b2010-09-30 20:47:46 +02001929 } else if (bmval1) {
1930 if ((buflen -= 12) < 0)
1931 goto out_resource;
Andy Adamson7e705702009-04-03 08:29:11 +03001932 WRITE32(2);
1933 WRITE32(bmval0);
1934 WRITE32(bmval1);
1935 } else {
Benny Halevy2b44f1b2010-09-30 20:47:46 +02001936 if ((buflen -= 8) < 0)
1937 goto out_resource;
Andy Adamson7e705702009-04-03 08:29:11 +03001938 WRITE32(1);
1939 WRITE32(bmval0);
1940 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001941 attrlenp = p++; /* to be backfilled later */
1942
1943 if (bmval0 & FATTR4_WORD0_SUPPORTED_ATTRS) {
Andy Adamson7e705702009-04-03 08:29:11 +03001944 u32 word0 = nfsd_suppattrs0(minorversion);
1945 u32 word1 = nfsd_suppattrs1(minorversion);
1946 u32 word2 = nfsd_suppattrs2(minorversion);
1947
J.Bruce Fields42ca0992006-10-04 02:16:20 -07001948 if (!aclsupport)
1949 word0 &= ~FATTR4_WORD0_ACL;
Andy Adamson7e705702009-04-03 08:29:11 +03001950 if (!word2) {
Benny Halevy2b44f1b2010-09-30 20:47:46 +02001951 if ((buflen -= 12) < 0)
1952 goto out_resource;
Andy Adamson7e705702009-04-03 08:29:11 +03001953 WRITE32(2);
1954 WRITE32(word0);
1955 WRITE32(word1);
1956 } else {
Benny Halevy2b44f1b2010-09-30 20:47:46 +02001957 if ((buflen -= 16) < 0)
1958 goto out_resource;
Andy Adamson7e705702009-04-03 08:29:11 +03001959 WRITE32(3);
1960 WRITE32(word0);
1961 WRITE32(word1);
1962 WRITE32(word2);
1963 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001964 }
1965 if (bmval0 & FATTR4_WORD0_TYPE) {
1966 if ((buflen -= 4) < 0)
1967 goto out_resource;
J. Bruce Fields3d2544b2011-08-15 11:49:30 -04001968 dummy = nfs4_file_type(stat.mode);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001969 if (dummy == NF4BAD)
1970 goto out_serverfault;
1971 WRITE32(dummy);
1972 }
1973 if (bmval0 & FATTR4_WORD0_FH_EXPIRE_TYPE) {
1974 if ((buflen -= 4) < 0)
1975 goto out_resource;
NeilBrown49640002005-06-23 22:02:58 -07001976 if (exp->ex_flags & NFSEXP_NOSUBTREECHECK)
NeilBrowne34ac862005-07-07 17:59:30 -07001977 WRITE32(NFS4_FH_PERSISTENT);
NeilBrown49640002005-06-23 22:02:58 -07001978 else
NeilBrowne34ac862005-07-07 17:59:30 -07001979 WRITE32(NFS4_FH_PERSISTENT|NFS4_FH_VOL_RENAME);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001980 }
1981 if (bmval0 & FATTR4_WORD0_CHANGE) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001982 if ((buflen -= 8) < 0)
1983 goto out_resource;
J. Bruce Fieldsc654b8a2009-04-16 17:33:25 -04001984 write_change(&p, &stat, dentry->d_inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001985 }
1986 if (bmval0 & FATTR4_WORD0_SIZE) {
1987 if ((buflen -= 8) < 0)
1988 goto out_resource;
1989 WRITE64(stat.size);
1990 }
1991 if (bmval0 & FATTR4_WORD0_LINK_SUPPORT) {
1992 if ((buflen -= 4) < 0)
1993 goto out_resource;
1994 WRITE32(1);
1995 }
1996 if (bmval0 & FATTR4_WORD0_SYMLINK_SUPPORT) {
1997 if ((buflen -= 4) < 0)
1998 goto out_resource;
1999 WRITE32(1);
2000 }
2001 if (bmval0 & FATTR4_WORD0_NAMED_ATTR) {
2002 if ((buflen -= 4) < 0)
2003 goto out_resource;
2004 WRITE32(0);
2005 }
2006 if (bmval0 & FATTR4_WORD0_FSID) {
2007 if ((buflen -= 16) < 0)
2008 goto out_resource;
J.Bruce Fields42ca0992006-10-04 02:16:20 -07002009 if (exp->ex_fslocs.migrated) {
2010 WRITE64(NFS4_REFERRAL_FSID_MAJOR);
2011 WRITE64(NFS4_REFERRAL_FSID_MINOR);
NeilBrownaf6a4e22007-02-14 00:33:12 -08002012 } else switch(fsid_source(fhp)) {
2013 case FSIDSOURCE_FSID:
Linus Torvalds1da177e2005-04-16 15:20:36 -07002014 WRITE64((u64)exp->ex_fsid);
2015 WRITE64((u64)0);
NeilBrownaf6a4e22007-02-14 00:33:12 -08002016 break;
2017 case FSIDSOURCE_DEV:
Linus Torvalds1da177e2005-04-16 15:20:36 -07002018 WRITE32(0);
2019 WRITE32(MAJOR(stat.dev));
2020 WRITE32(0);
2021 WRITE32(MINOR(stat.dev));
NeilBrownaf6a4e22007-02-14 00:33:12 -08002022 break;
2023 case FSIDSOURCE_UUID:
2024 WRITEMEM(exp->ex_uuid, 16);
2025 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002026 }
2027 }
2028 if (bmval0 & FATTR4_WORD0_UNIQUE_HANDLES) {
2029 if ((buflen -= 4) < 0)
2030 goto out_resource;
2031 WRITE32(0);
2032 }
2033 if (bmval0 & FATTR4_WORD0_LEASE_TIME) {
2034 if ((buflen -= 4) < 0)
2035 goto out_resource;
J. Bruce Fieldscf07d2e2010-02-28 23:20:19 -05002036 WRITE32(nfsd4_lease);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002037 }
2038 if (bmval0 & FATTR4_WORD0_RDATTR_ERROR) {
2039 if ((buflen -= 4) < 0)
2040 goto out_resource;
J.Bruce Fields42ca0992006-10-04 02:16:20 -07002041 WRITE32(rdattr_err);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002042 }
2043 if (bmval0 & FATTR4_WORD0_ACL) {
2044 struct nfs4_ace *ace;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002045
2046 if (acl == NULL) {
2047 if ((buflen -= 4) < 0)
2048 goto out_resource;
2049
2050 WRITE32(0);
2051 goto out_acl;
2052 }
2053 if ((buflen -= 4) < 0)
2054 goto out_resource;
2055 WRITE32(acl->naces);
2056
J. Bruce Fields28e05dd2007-02-16 01:28:30 -08002057 for (ace = acl->aces; ace < acl->aces + acl->naces; ace++) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002058 if ((buflen -= 4*3) < 0)
2059 goto out_resource;
2060 WRITE32(ace->type);
2061 WRITE32(ace->flag);
2062 WRITE32(ace->access_mask & NFS4_ACE_MASK_ALL);
2063 status = nfsd4_encode_aclname(rqstp, ace->whotype,
2064 ace->who, ace->flag & NFS4_ACE_IDENTIFIER_GROUP,
2065 &p, &buflen);
2066 if (status == nfserr_resource)
2067 goto out_resource;
2068 if (status)
2069 goto out;
2070 }
2071 }
2072out_acl:
2073 if (bmval0 & FATTR4_WORD0_ACLSUPPORT) {
2074 if ((buflen -= 4) < 0)
2075 goto out_resource;
2076 WRITE32(aclsupport ?
2077 ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL : 0);
2078 }
2079 if (bmval0 & FATTR4_WORD0_CANSETTIME) {
2080 if ((buflen -= 4) < 0)
2081 goto out_resource;
2082 WRITE32(1);
2083 }
2084 if (bmval0 & FATTR4_WORD0_CASE_INSENSITIVE) {
2085 if ((buflen -= 4) < 0)
2086 goto out_resource;
2087 WRITE32(1);
2088 }
2089 if (bmval0 & FATTR4_WORD0_CASE_PRESERVING) {
2090 if ((buflen -= 4) < 0)
2091 goto out_resource;
2092 WRITE32(1);
2093 }
2094 if (bmval0 & FATTR4_WORD0_CHOWN_RESTRICTED) {
2095 if ((buflen -= 4) < 0)
2096 goto out_resource;
2097 WRITE32(1);
2098 }
2099 if (bmval0 & FATTR4_WORD0_FILEHANDLE) {
2100 buflen -= (XDR_QUADLEN(fhp->fh_handle.fh_size) << 2) + 4;
2101 if (buflen < 0)
2102 goto out_resource;
2103 WRITE32(fhp->fh_handle.fh_size);
2104 WRITEMEM(&fhp->fh_handle.fh_base, fhp->fh_handle.fh_size);
2105 }
2106 if (bmval0 & FATTR4_WORD0_FILEID) {
2107 if ((buflen -= 8) < 0)
2108 goto out_resource;
Peter Staubach40ee5dc2007-08-16 12:10:07 -04002109 WRITE64(stat.ino);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002110 }
2111 if (bmval0 & FATTR4_WORD0_FILES_AVAIL) {
2112 if ((buflen -= 8) < 0)
2113 goto out_resource;
2114 WRITE64((u64) statfs.f_ffree);
2115 }
2116 if (bmval0 & FATTR4_WORD0_FILES_FREE) {
2117 if ((buflen -= 8) < 0)
2118 goto out_resource;
2119 WRITE64((u64) statfs.f_ffree);
2120 }
2121 if (bmval0 & FATTR4_WORD0_FILES_TOTAL) {
2122 if ((buflen -= 8) < 0)
2123 goto out_resource;
2124 WRITE64((u64) statfs.f_files);
2125 }
J.Bruce Fields81c3f412006-10-04 02:16:19 -07002126 if (bmval0 & FATTR4_WORD0_FS_LOCATIONS) {
2127 status = nfsd4_encode_fs_locations(rqstp, exp, &p, &buflen);
2128 if (status == nfserr_resource)
2129 goto out_resource;
2130 if (status)
2131 goto out;
2132 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002133 if (bmval0 & FATTR4_WORD0_HOMOGENEOUS) {
2134 if ((buflen -= 4) < 0)
2135 goto out_resource;
2136 WRITE32(1);
2137 }
2138 if (bmval0 & FATTR4_WORD0_MAXFILESIZE) {
2139 if ((buflen -= 8) < 0)
2140 goto out_resource;
2141 WRITE64(~(u64)0);
2142 }
2143 if (bmval0 & FATTR4_WORD0_MAXLINK) {
2144 if ((buflen -= 4) < 0)
2145 goto out_resource;
2146 WRITE32(255);
2147 }
2148 if (bmval0 & FATTR4_WORD0_MAXNAME) {
2149 if ((buflen -= 4) < 0)
2150 goto out_resource;
J. Bruce Fieldsa16e92e2007-09-28 16:45:51 -04002151 WRITE32(statfs.f_namelen);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002152 }
2153 if (bmval0 & FATTR4_WORD0_MAXREAD) {
2154 if ((buflen -= 8) < 0)
2155 goto out_resource;
Greg Banks7adae482006-10-04 02:15:47 -07002156 WRITE64((u64) svc_max_payload(rqstp));
Linus Torvalds1da177e2005-04-16 15:20:36 -07002157 }
2158 if (bmval0 & FATTR4_WORD0_MAXWRITE) {
2159 if ((buflen -= 8) < 0)
2160 goto out_resource;
Greg Banks7adae482006-10-04 02:15:47 -07002161 WRITE64((u64) svc_max_payload(rqstp));
Linus Torvalds1da177e2005-04-16 15:20:36 -07002162 }
2163 if (bmval1 & FATTR4_WORD1_MODE) {
2164 if ((buflen -= 4) < 0)
2165 goto out_resource;
2166 WRITE32(stat.mode & S_IALLUGO);
2167 }
2168 if (bmval1 & FATTR4_WORD1_NO_TRUNC) {
2169 if ((buflen -= 4) < 0)
2170 goto out_resource;
2171 WRITE32(1);
2172 }
2173 if (bmval1 & FATTR4_WORD1_NUMLINKS) {
2174 if ((buflen -= 4) < 0)
2175 goto out_resource;
2176 WRITE32(stat.nlink);
2177 }
2178 if (bmval1 & FATTR4_WORD1_OWNER) {
2179 status = nfsd4_encode_user(rqstp, stat.uid, &p, &buflen);
2180 if (status == nfserr_resource)
2181 goto out_resource;
2182 if (status)
2183 goto out;
2184 }
2185 if (bmval1 & FATTR4_WORD1_OWNER_GROUP) {
2186 status = nfsd4_encode_group(rqstp, stat.gid, &p, &buflen);
2187 if (status == nfserr_resource)
2188 goto out_resource;
2189 if (status)
2190 goto out;
2191 }
2192 if (bmval1 & FATTR4_WORD1_RAWDEV) {
2193 if ((buflen -= 8) < 0)
2194 goto out_resource;
2195 WRITE32((u32) MAJOR(stat.rdev));
2196 WRITE32((u32) MINOR(stat.rdev));
2197 }
2198 if (bmval1 & FATTR4_WORD1_SPACE_AVAIL) {
2199 if ((buflen -= 8) < 0)
2200 goto out_resource;
2201 dummy64 = (u64)statfs.f_bavail * (u64)statfs.f_bsize;
2202 WRITE64(dummy64);
2203 }
2204 if (bmval1 & FATTR4_WORD1_SPACE_FREE) {
2205 if ((buflen -= 8) < 0)
2206 goto out_resource;
2207 dummy64 = (u64)statfs.f_bfree * (u64)statfs.f_bsize;
2208 WRITE64(dummy64);
2209 }
2210 if (bmval1 & FATTR4_WORD1_SPACE_TOTAL) {
2211 if ((buflen -= 8) < 0)
2212 goto out_resource;
2213 dummy64 = (u64)statfs.f_blocks * (u64)statfs.f_bsize;
2214 WRITE64(dummy64);
2215 }
2216 if (bmval1 & FATTR4_WORD1_SPACE_USED) {
2217 if ((buflen -= 8) < 0)
2218 goto out_resource;
2219 dummy64 = (u64)stat.blocks << 9;
2220 WRITE64(dummy64);
2221 }
2222 if (bmval1 & FATTR4_WORD1_TIME_ACCESS) {
2223 if ((buflen -= 12) < 0)
2224 goto out_resource;
2225 WRITE32(0);
2226 WRITE32(stat.atime.tv_sec);
2227 WRITE32(stat.atime.tv_nsec);
2228 }
2229 if (bmval1 & FATTR4_WORD1_TIME_DELTA) {
2230 if ((buflen -= 12) < 0)
2231 goto out_resource;
2232 WRITE32(0);
2233 WRITE32(1);
2234 WRITE32(0);
2235 }
2236 if (bmval1 & FATTR4_WORD1_TIME_METADATA) {
2237 if ((buflen -= 12) < 0)
2238 goto out_resource;
2239 WRITE32(0);
2240 WRITE32(stat.ctime.tv_sec);
2241 WRITE32(stat.ctime.tv_nsec);
2242 }
2243 if (bmval1 & FATTR4_WORD1_TIME_MODIFY) {
2244 if ((buflen -= 12) < 0)
2245 goto out_resource;
2246 WRITE32(0);
2247 WRITE32(stat.mtime.tv_sec);
2248 WRITE32(stat.mtime.tv_nsec);
2249 }
2250 if (bmval1 & FATTR4_WORD1_MOUNTED_ON_FILEID) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002251 if ((buflen -= 8) < 0)
2252 goto out_resource;
Frank Filz406a7ea2007-11-27 11:34:05 -08002253 /*
2254 * Get parent's attributes if not ignoring crossmount
2255 * and this is the root of a cross-mounted filesystem.
2256 */
2257 if (ignore_crossmnt == 0 &&
Al Viro462d6052010-01-30 16:11:21 -05002258 dentry == exp->ex_path.mnt->mnt_root) {
2259 struct path path = exp->ex_path;
2260 path_get(&path);
2261 while (follow_up(&path)) {
2262 if (path.dentry != path.mnt->mnt_root)
2263 break;
2264 }
2265 err = vfs_getattr(path.mnt, path.dentry, &stat);
2266 path_put(&path);
Peter Staubach40ee5dc2007-08-16 12:10:07 -04002267 if (err)
2268 goto out_nfserr;
2269 }
2270 WRITE64(stat.ino);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002271 }
Benny Halevy8c18f202009-04-03 08:29:14 +03002272 if (bmval2 & FATTR4_WORD2_SUPPATTR_EXCLCREAT) {
2273 WRITE32(3);
2274 WRITE32(NFSD_SUPPATTR_EXCLCREAT_WORD0);
2275 WRITE32(NFSD_SUPPATTR_EXCLCREAT_WORD1);
2276 WRITE32(NFSD_SUPPATTR_EXCLCREAT_WORD2);
2277 }
Andy Adamson7e705702009-04-03 08:29:11 +03002278
Linus Torvalds1da177e2005-04-16 15:20:36 -07002279 *attrlenp = htonl((char *)p - (char *)attrlenp - 4);
2280 *countp = p - buffer;
2281 status = nfs_ok;
2282
2283out:
J. Bruce Fields28e05dd2007-02-16 01:28:30 -08002284 kfree(acl);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002285 if (fhp == &tempfh)
2286 fh_put(&tempfh);
2287 return status;
2288out_nfserr:
Al Virob8dd7b92006-10-19 23:29:01 -07002289 status = nfserrno(err);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002290 goto out;
2291out_resource:
2292 *countp = 0;
2293 status = nfserr_resource;
2294 goto out;
2295out_serverfault:
2296 status = nfserr_serverfault;
2297 goto out;
2298}
2299
J. Bruce Fieldsc0ce6ec2008-02-11 15:48:47 -05002300static inline int attributes_need_mount(u32 *bmval)
2301{
2302 if (bmval[0] & ~(FATTR4_WORD0_RDATTR_ERROR | FATTR4_WORD0_LEASE_TIME))
2303 return 1;
2304 if (bmval[1] & ~FATTR4_WORD1_MOUNTED_ON_FILEID)
2305 return 1;
2306 return 0;
2307}
2308
Al Virob37ad282006-10-19 23:28:59 -07002309static __be32
Linus Torvalds1da177e2005-04-16 15:20:36 -07002310nfsd4_encode_dirent_fattr(struct nfsd4_readdir *cd,
Al Viro2ebbc012006-10-19 23:28:58 -07002311 const char *name, int namlen, __be32 *p, int *buflen)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002312{
2313 struct svc_export *exp = cd->rd_fhp->fh_export;
2314 struct dentry *dentry;
Al Virob37ad282006-10-19 23:28:59 -07002315 __be32 nfserr;
Frank Filz406a7ea2007-11-27 11:34:05 -08002316 int ignore_crossmnt = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002317
2318 dentry = lookup_one_len(name, cd->rd_fhp->fh_dentry, namlen);
2319 if (IS_ERR(dentry))
2320 return nfserrno(PTR_ERR(dentry));
J. Bruce Fieldsb2c0cea2009-05-05 19:04:29 -04002321 if (!dentry->d_inode) {
2322 /*
2323 * nfsd_buffered_readdir drops the i_mutex between
2324 * readdir and calling this callback, leaving a window
2325 * where this directory entry could have gone away.
2326 */
2327 dput(dentry);
2328 return nfserr_noent;
2329 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002330
2331 exp_get(exp);
Frank Filz406a7ea2007-11-27 11:34:05 -08002332 /*
2333 * In the case of a mountpoint, the client may be asking for
2334 * attributes that are only properties of the underlying filesystem
2335 * as opposed to the cross-mounted file system. In such a case,
2336 * we will not follow the cross mount and will fill the attribtutes
2337 * directly from the mountpoint dentry.
2338 */
J. Bruce Fields3227fa42009-10-25 21:43:01 -04002339 if (nfsd_mountpoint(dentry, exp)) {
J.Bruce Fields021d3a72006-12-13 00:35:24 -08002340 int err;
2341
J. Bruce Fields3227fa42009-10-25 21:43:01 -04002342 if (!(exp->ex_flags & NFSEXP_V4ROOT)
2343 && !attributes_need_mount(cd->rd_bmval)) {
2344 ignore_crossmnt = 1;
2345 goto out_encode;
2346 }
Andy Adamsondcb488a32007-07-17 04:04:51 -07002347 /*
2348 * Why the heck aren't we just using nfsd_lookup??
2349 * Different "."/".." handling? Something else?
2350 * At least, add a comment here to explain....
2351 */
J.Bruce Fields021d3a72006-12-13 00:35:24 -08002352 err = nfsd_cross_mnt(cd->rd_rqstp, &dentry, &exp);
2353 if (err) {
2354 nfserr = nfserrno(err);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002355 goto out_put;
2356 }
Andy Adamsondcb488a32007-07-17 04:04:51 -07002357 nfserr = check_nfsd_access(exp, cd->rd_rqstp);
2358 if (nfserr)
2359 goto out_put;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002360
2361 }
J. Bruce Fields3227fa42009-10-25 21:43:01 -04002362out_encode:
Linus Torvalds1da177e2005-04-16 15:20:36 -07002363 nfserr = nfsd4_encode_fattr(NULL, exp, dentry, p, buflen, cd->rd_bmval,
Frank Filz406a7ea2007-11-27 11:34:05 -08002364 cd->rd_rqstp, ignore_crossmnt);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002365out_put:
2366 dput(dentry);
2367 exp_put(exp);
2368 return nfserr;
2369}
2370
Al Viro2ebbc012006-10-19 23:28:58 -07002371static __be32 *
Al Virob37ad282006-10-19 23:28:59 -07002372nfsd4_encode_rdattr_error(__be32 *p, int buflen, __be32 nfserr)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002373{
Al Viro2ebbc012006-10-19 23:28:58 -07002374 __be32 *attrlenp;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002375
2376 if (buflen < 6)
2377 return NULL;
2378 *p++ = htonl(2);
2379 *p++ = htonl(FATTR4_WORD0_RDATTR_ERROR); /* bmval0 */
2380 *p++ = htonl(0); /* bmval1 */
2381
2382 attrlenp = p++;
2383 *p++ = nfserr; /* no htonl */
2384 *attrlenp = htonl((char *)p - (char *)attrlenp - 4);
2385 return p;
2386}
2387
2388static int
NeilBrowna0ad13e2007-01-26 00:57:10 -08002389nfsd4_encode_dirent(void *ccdv, const char *name, int namlen,
2390 loff_t offset, u64 ino, unsigned int d_type)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002391{
NeilBrowna0ad13e2007-01-26 00:57:10 -08002392 struct readdir_cd *ccd = ccdv;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002393 struct nfsd4_readdir *cd = container_of(ccd, struct nfsd4_readdir, common);
2394 int buflen;
Al Viro2ebbc012006-10-19 23:28:58 -07002395 __be32 *p = cd->buffer;
J. Bruce Fieldsb2c0cea2009-05-05 19:04:29 -04002396 __be32 *cookiep;
Al Virob37ad282006-10-19 23:28:59 -07002397 __be32 nfserr = nfserr_toosmall;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002398
2399 /* In nfsv4, "." and ".." never make it onto the wire.. */
2400 if (name && isdotent(name, namlen)) {
2401 cd->common.err = nfs_ok;
2402 return 0;
2403 }
2404
2405 if (cd->offset)
2406 xdr_encode_hyper(cd->offset, (u64) offset);
2407
2408 buflen = cd->buflen - 4 - XDR_QUADLEN(namlen);
2409 if (buflen < 0)
2410 goto fail;
2411
2412 *p++ = xdr_one; /* mark entry present */
J. Bruce Fieldsb2c0cea2009-05-05 19:04:29 -04002413 cookiep = p;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002414 p = xdr_encode_hyper(p, NFS_OFFSET_MAX); /* offset of next entry */
2415 p = xdr_encode_array(p, name, namlen); /* name length & name */
2416
2417 nfserr = nfsd4_encode_dirent_fattr(cd, name, namlen, p, &buflen);
2418 switch (nfserr) {
2419 case nfs_ok:
2420 p += buflen;
2421 break;
2422 case nfserr_resource:
2423 nfserr = nfserr_toosmall;
2424 goto fail;
J. Bruce Fieldsb2c0cea2009-05-05 19:04:29 -04002425 case nfserr_noent:
2426 goto skip_entry;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002427 default:
2428 /*
2429 * If the client requested the RDATTR_ERROR attribute,
2430 * we stuff the error code into this attribute
2431 * and continue. If this attribute was not requested,
2432 * then in accordance with the spec, we fail the
2433 * entire READDIR operation(!)
2434 */
2435 if (!(cd->rd_bmval[0] & FATTR4_WORD0_RDATTR_ERROR))
2436 goto fail;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002437 p = nfsd4_encode_rdattr_error(p, buflen, nfserr);
Fred Isaman34081ef2006-01-18 17:43:40 -08002438 if (p == NULL) {
2439 nfserr = nfserr_toosmall;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002440 goto fail;
Fred Isaman34081ef2006-01-18 17:43:40 -08002441 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002442 }
2443 cd->buflen -= (p - cd->buffer);
2444 cd->buffer = p;
J. Bruce Fieldsb2c0cea2009-05-05 19:04:29 -04002445 cd->offset = cookiep;
2446skip_entry:
Linus Torvalds1da177e2005-04-16 15:20:36 -07002447 cd->common.err = nfs_ok;
2448 return 0;
2449fail:
2450 cd->common.err = nfserr;
2451 return -EINVAL;
2452}
2453
Benny Halevye2f282b2008-08-12 20:45:07 +03002454static void
2455nfsd4_encode_stateid(struct nfsd4_compoundres *resp, stateid_t *sid)
2456{
J. Bruce Fieldsbc749ca2009-04-07 16:55:27 -07002457 __be32 *p;
Benny Halevye2f282b2008-08-12 20:45:07 +03002458
2459 RESERVE_SPACE(sizeof(stateid_t));
2460 WRITE32(sid->si_generation);
2461 WRITEMEM(&sid->si_opaque, sizeof(stateid_opaque_t));
2462 ADJUST_ARGS();
2463}
2464
Benny Halevy695e12f2008-07-04 14:38:33 +03002465static __be32
Al Virob37ad282006-10-19 23:28:59 -07002466nfsd4_encode_access(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_access *access)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002467{
J. Bruce Fieldsbc749ca2009-04-07 16:55:27 -07002468 __be32 *p;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002469
2470 if (!nfserr) {
2471 RESERVE_SPACE(8);
2472 WRITE32(access->ac_supported);
2473 WRITE32(access->ac_resp_access);
2474 ADJUST_ARGS();
2475 }
Benny Halevy695e12f2008-07-04 14:38:33 +03002476 return nfserr;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002477}
2478
J. Bruce Fields1d1bc8f2010-10-04 23:12:59 -04002479static __be32 nfsd4_encode_bind_conn_to_session(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_bind_conn_to_session *bcts)
2480{
2481 __be32 *p;
2482
2483 if (!nfserr) {
2484 RESERVE_SPACE(NFS4_MAX_SESSIONID_LEN + 8);
2485 WRITEMEM(bcts->sessionid.data, NFS4_MAX_SESSIONID_LEN);
2486 WRITE32(bcts->dir);
2487 /* XXX: ? */
2488 WRITE32(0);
2489 ADJUST_ARGS();
2490 }
2491 return nfserr;
2492}
2493
Benny Halevy695e12f2008-07-04 14:38:33 +03002494static __be32
Al Virob37ad282006-10-19 23:28:59 -07002495nfsd4_encode_close(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_close *close)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002496{
2497 ENCODE_SEQID_OP_HEAD;
2498
Benny Halevye2f282b2008-08-12 20:45:07 +03002499 if (!nfserr)
2500 nfsd4_encode_stateid(resp, &close->cl_stateid);
2501
J. Bruce Fieldsf3e42232011-08-24 12:27:31 -04002502 encode_seqid_op_tail(resp, save, nfserr);
Benny Halevy695e12f2008-07-04 14:38:33 +03002503 return nfserr;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002504}
2505
2506
Benny Halevy695e12f2008-07-04 14:38:33 +03002507static __be32
Al Virob37ad282006-10-19 23:28:59 -07002508nfsd4_encode_commit(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_commit *commit)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002509{
J. Bruce Fieldsbc749ca2009-04-07 16:55:27 -07002510 __be32 *p;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002511
2512 if (!nfserr) {
2513 RESERVE_SPACE(8);
2514 WRITEMEM(commit->co_verf.data, 8);
2515 ADJUST_ARGS();
2516 }
Benny Halevy695e12f2008-07-04 14:38:33 +03002517 return nfserr;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002518}
2519
Benny Halevy695e12f2008-07-04 14:38:33 +03002520static __be32
Al Virob37ad282006-10-19 23:28:59 -07002521nfsd4_encode_create(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_create *create)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002522{
J. Bruce Fieldsbc749ca2009-04-07 16:55:27 -07002523 __be32 *p;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002524
2525 if (!nfserr) {
2526 RESERVE_SPACE(32);
J. Bruce Fieldsc654b8a2009-04-16 17:33:25 -04002527 write_cinfo(&p, &create->cr_cinfo);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002528 WRITE32(2);
2529 WRITE32(create->cr_bmval[0]);
2530 WRITE32(create->cr_bmval[1]);
2531 ADJUST_ARGS();
2532 }
Benny Halevy695e12f2008-07-04 14:38:33 +03002533 return nfserr;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002534}
2535
Al Virob37ad282006-10-19 23:28:59 -07002536static __be32
2537nfsd4_encode_getattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_getattr *getattr)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002538{
2539 struct svc_fh *fhp = getattr->ga_fhp;
2540 int buflen;
2541
2542 if (nfserr)
2543 return nfserr;
2544
2545 buflen = resp->end - resp->p - (COMPOUND_ERR_SLACK_SPACE >> 2);
2546 nfserr = nfsd4_encode_fattr(fhp, fhp->fh_export, fhp->fh_dentry,
2547 resp->p, &buflen, getattr->ga_bmval,
Frank Filz406a7ea2007-11-27 11:34:05 -08002548 resp->rqstp, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002549 if (!nfserr)
2550 resp->p += buflen;
2551 return nfserr;
2552}
2553
Benny Halevy695e12f2008-07-04 14:38:33 +03002554static __be32
2555nfsd4_encode_getfh(struct nfsd4_compoundres *resp, __be32 nfserr, struct svc_fh **fhpp)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002556{
Benny Halevy695e12f2008-07-04 14:38:33 +03002557 struct svc_fh *fhp = *fhpp;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002558 unsigned int len;
J. Bruce Fieldsbc749ca2009-04-07 16:55:27 -07002559 __be32 *p;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002560
2561 if (!nfserr) {
2562 len = fhp->fh_handle.fh_size;
2563 RESERVE_SPACE(len + 4);
2564 WRITE32(len);
2565 WRITEMEM(&fhp->fh_handle.fh_base, len);
2566 ADJUST_ARGS();
2567 }
Benny Halevy695e12f2008-07-04 14:38:33 +03002568 return nfserr;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002569}
2570
2571/*
2572* Including all fields other than the name, a LOCK4denied structure requires
2573* 8(clientid) + 4(namelen) + 8(offset) + 8(length) + 4(type) = 32 bytes.
2574*/
2575static void
2576nfsd4_encode_lock_denied(struct nfsd4_compoundres *resp, struct nfsd4_lock_denied *ld)
2577{
J. Bruce Fieldsbc749ca2009-04-07 16:55:27 -07002578 __be32 *p;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002579
2580 RESERVE_SPACE(32 + XDR_LEN(ld->ld_sop ? ld->ld_sop->so_owner.len : 0));
2581 WRITE64(ld->ld_start);
2582 WRITE64(ld->ld_length);
2583 WRITE32(ld->ld_type);
2584 if (ld->ld_sop) {
2585 WRITEMEM(&ld->ld_clientid, 8);
2586 WRITE32(ld->ld_sop->so_owner.len);
2587 WRITEMEM(ld->ld_sop->so_owner.data, ld->ld_sop->so_owner.len);
2588 kref_put(&ld->ld_sop->so_ref, nfs4_free_stateowner);
2589 } else { /* non - nfsv4 lock in conflict, no clientid nor owner */
2590 WRITE64((u64)0); /* clientid */
2591 WRITE32(0); /* length of owner name */
2592 }
2593 ADJUST_ARGS();
2594}
2595
Benny Halevy695e12f2008-07-04 14:38:33 +03002596static __be32
Al Virob37ad282006-10-19 23:28:59 -07002597nfsd4_encode_lock(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lock *lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002598{
Linus Torvalds1da177e2005-04-16 15:20:36 -07002599 ENCODE_SEQID_OP_HEAD;
2600
Benny Halevye2f282b2008-08-12 20:45:07 +03002601 if (!nfserr)
2602 nfsd4_encode_stateid(resp, &lock->lk_resp_stateid);
2603 else if (nfserr == nfserr_denied)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002604 nfsd4_encode_lock_denied(resp, &lock->lk_denied);
2605
J. Bruce Fieldsf3e42232011-08-24 12:27:31 -04002606 encode_seqid_op_tail(resp, save, nfserr);
Benny Halevy695e12f2008-07-04 14:38:33 +03002607 return nfserr;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002608}
2609
Benny Halevy695e12f2008-07-04 14:38:33 +03002610static __be32
Al Virob37ad282006-10-19 23:28:59 -07002611nfsd4_encode_lockt(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lockt *lockt)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002612{
2613 if (nfserr == nfserr_denied)
2614 nfsd4_encode_lock_denied(resp, &lockt->lt_denied);
Benny Halevy695e12f2008-07-04 14:38:33 +03002615 return nfserr;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002616}
2617
Benny Halevy695e12f2008-07-04 14:38:33 +03002618static __be32
Al Virob37ad282006-10-19 23:28:59 -07002619nfsd4_encode_locku(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_locku *locku)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002620{
2621 ENCODE_SEQID_OP_HEAD;
2622
Benny Halevye2f282b2008-08-12 20:45:07 +03002623 if (!nfserr)
2624 nfsd4_encode_stateid(resp, &locku->lu_stateid);
2625
J. Bruce Fieldsf3e42232011-08-24 12:27:31 -04002626 encode_seqid_op_tail(resp, save, nfserr);
Benny Halevy695e12f2008-07-04 14:38:33 +03002627 return nfserr;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002628}
2629
2630
Benny Halevy695e12f2008-07-04 14:38:33 +03002631static __be32
Al Virob37ad282006-10-19 23:28:59 -07002632nfsd4_encode_link(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_link *link)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002633{
J. Bruce Fieldsbc749ca2009-04-07 16:55:27 -07002634 __be32 *p;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002635
2636 if (!nfserr) {
2637 RESERVE_SPACE(20);
J. Bruce Fieldsc654b8a2009-04-16 17:33:25 -04002638 write_cinfo(&p, &link->li_cinfo);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002639 ADJUST_ARGS();
2640 }
Benny Halevy695e12f2008-07-04 14:38:33 +03002641 return nfserr;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002642}
2643
2644
Benny Halevy695e12f2008-07-04 14:38:33 +03002645static __be32
Al Virob37ad282006-10-19 23:28:59 -07002646nfsd4_encode_open(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open *open)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002647{
J. Bruce Fieldsbc749ca2009-04-07 16:55:27 -07002648 __be32 *p;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002649 ENCODE_SEQID_OP_HEAD;
2650
2651 if (nfserr)
2652 goto out;
2653
Benny Halevye2f282b2008-08-12 20:45:07 +03002654 nfsd4_encode_stateid(resp, &open->op_stateid);
2655 RESERVE_SPACE(40);
J. Bruce Fieldsc654b8a2009-04-16 17:33:25 -04002656 write_cinfo(&p, &open->op_cinfo);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002657 WRITE32(open->op_rflags);
2658 WRITE32(2);
2659 WRITE32(open->op_bmval[0]);
2660 WRITE32(open->op_bmval[1]);
2661 WRITE32(open->op_delegate_type);
2662 ADJUST_ARGS();
2663
2664 switch (open->op_delegate_type) {
2665 case NFS4_OPEN_DELEGATE_NONE:
2666 break;
2667 case NFS4_OPEN_DELEGATE_READ:
Benny Halevye2f282b2008-08-12 20:45:07 +03002668 nfsd4_encode_stateid(resp, &open->op_delegate_stateid);
2669 RESERVE_SPACE(20);
NeilBrown7b190fe2005-06-23 22:03:23 -07002670 WRITE32(open->op_recall);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002671
2672 /*
2673 * TODO: ACE's in delegations
2674 */
2675 WRITE32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
2676 WRITE32(0);
2677 WRITE32(0);
2678 WRITE32(0); /* XXX: is NULL principal ok? */
2679 ADJUST_ARGS();
2680 break;
2681 case NFS4_OPEN_DELEGATE_WRITE:
Benny Halevye2f282b2008-08-12 20:45:07 +03002682 nfsd4_encode_stateid(resp, &open->op_delegate_stateid);
2683 RESERVE_SPACE(32);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002684 WRITE32(0);
2685
2686 /*
2687 * TODO: space_limit's in delegations
2688 */
2689 WRITE32(NFS4_LIMIT_SIZE);
2690 WRITE32(~(u32)0);
2691 WRITE32(~(u32)0);
2692
2693 /*
2694 * TODO: ACE's in delegations
2695 */
2696 WRITE32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
2697 WRITE32(0);
2698 WRITE32(0);
2699 WRITE32(0); /* XXX: is NULL principal ok? */
2700 ADJUST_ARGS();
2701 break;
2702 default:
2703 BUG();
2704 }
2705 /* XXX save filehandle here */
2706out:
J. Bruce Fieldsf3e42232011-08-24 12:27:31 -04002707 encode_seqid_op_tail(resp, save, nfserr);
Benny Halevy695e12f2008-07-04 14:38:33 +03002708 return nfserr;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002709}
2710
Benny Halevy695e12f2008-07-04 14:38:33 +03002711static __be32
Al Virob37ad282006-10-19 23:28:59 -07002712nfsd4_encode_open_confirm(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_confirm *oc)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002713{
2714 ENCODE_SEQID_OP_HEAD;
Benny Halevye2f282b2008-08-12 20:45:07 +03002715
2716 if (!nfserr)
2717 nfsd4_encode_stateid(resp, &oc->oc_resp_stateid);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002718
J. Bruce Fieldsf3e42232011-08-24 12:27:31 -04002719 encode_seqid_op_tail(resp, save, nfserr);
Benny Halevy695e12f2008-07-04 14:38:33 +03002720 return nfserr;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002721}
2722
Benny Halevy695e12f2008-07-04 14:38:33 +03002723static __be32
Al Virob37ad282006-10-19 23:28:59 -07002724nfsd4_encode_open_downgrade(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_downgrade *od)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002725{
2726 ENCODE_SEQID_OP_HEAD;
Benny Halevye2f282b2008-08-12 20:45:07 +03002727
2728 if (!nfserr)
2729 nfsd4_encode_stateid(resp, &od->od_stateid);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002730
J. Bruce Fieldsf3e42232011-08-24 12:27:31 -04002731 encode_seqid_op_tail(resp, save, nfserr);
Benny Halevy695e12f2008-07-04 14:38:33 +03002732 return nfserr;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002733}
2734
Al Virob37ad282006-10-19 23:28:59 -07002735static __be32
2736nfsd4_encode_read(struct nfsd4_compoundres *resp, __be32 nfserr,
NeilBrown44524352006-10-04 02:15:46 -07002737 struct nfsd4_read *read)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002738{
2739 u32 eof;
2740 int v, pn;
2741 unsigned long maxcount;
2742 long len;
J. Bruce Fieldsbc749ca2009-04-07 16:55:27 -07002743 __be32 *p;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002744
2745 if (nfserr)
2746 return nfserr;
2747 if (resp->xbuf->page_len)
2748 return nfserr_resource;
2749
2750 RESERVE_SPACE(8); /* eof flag and byte count */
2751
Greg Banks7adae482006-10-04 02:15:47 -07002752 maxcount = svc_max_payload(resp->rqstp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002753 if (maxcount > read->rd_length)
2754 maxcount = read->rd_length;
2755
2756 len = maxcount;
2757 v = 0;
2758 while (len > 0) {
NeilBrown44524352006-10-04 02:15:46 -07002759 pn = resp->rqstp->rq_resused++;
NeilBrown3cc03b12006-10-04 02:15:47 -07002760 resp->rqstp->rq_vec[v].iov_base =
NeilBrown44524352006-10-04 02:15:46 -07002761 page_address(resp->rqstp->rq_respages[pn]);
NeilBrown3cc03b12006-10-04 02:15:47 -07002762 resp->rqstp->rq_vec[v].iov_len =
NeilBrown44524352006-10-04 02:15:46 -07002763 len < PAGE_SIZE ? len : PAGE_SIZE;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002764 v++;
2765 len -= PAGE_SIZE;
2766 }
2767 read->rd_vlen = v;
2768
J. Bruce Fields039a87c2010-07-30 11:33:32 -04002769 nfserr = nfsd_read_file(read->rd_rqstp, read->rd_fhp, read->rd_filp,
NeilBrown3cc03b12006-10-04 02:15:47 -07002770 read->rd_offset, resp->rqstp->rq_vec, read->rd_vlen,
Linus Torvalds1da177e2005-04-16 15:20:36 -07002771 &maxcount);
2772
Linus Torvalds1da177e2005-04-16 15:20:36 -07002773 if (nfserr)
2774 return nfserr;
NeilBrown44524352006-10-04 02:15:46 -07002775 eof = (read->rd_offset + maxcount >=
2776 read->rd_fhp->fh_dentry->d_inode->i_size);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002777
2778 WRITE32(eof);
2779 WRITE32(maxcount);
2780 ADJUST_ARGS();
NeilBrown6ed6dec2006-04-10 22:55:32 -07002781 resp->xbuf->head[0].iov_len = (char*)p
2782 - (char*)resp->xbuf->head[0].iov_base;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002783 resp->xbuf->page_len = maxcount;
2784
NeilBrown6ed6dec2006-04-10 22:55:32 -07002785 /* Use rest of head for padding and remaining ops: */
NeilBrown6ed6dec2006-04-10 22:55:32 -07002786 resp->xbuf->tail[0].iov_base = p;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002787 resp->xbuf->tail[0].iov_len = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002788 if (maxcount&3) {
NeilBrown6ed6dec2006-04-10 22:55:32 -07002789 RESERVE_SPACE(4);
2790 WRITE32(0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002791 resp->xbuf->tail[0].iov_base += maxcount&3;
2792 resp->xbuf->tail[0].iov_len = 4 - (maxcount&3);
NeilBrown6ed6dec2006-04-10 22:55:32 -07002793 ADJUST_ARGS();
Linus Torvalds1da177e2005-04-16 15:20:36 -07002794 }
2795 return 0;
2796}
2797
Al Virob37ad282006-10-19 23:28:59 -07002798static __be32
2799nfsd4_encode_readlink(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readlink *readlink)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002800{
2801 int maxcount;
2802 char *page;
J. Bruce Fieldsbc749ca2009-04-07 16:55:27 -07002803 __be32 *p;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002804
2805 if (nfserr)
2806 return nfserr;
2807 if (resp->xbuf->page_len)
2808 return nfserr_resource;
2809
NeilBrown44524352006-10-04 02:15:46 -07002810 page = page_address(resp->rqstp->rq_respages[resp->rqstp->rq_resused++]);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002811
2812 maxcount = PAGE_SIZE;
2813 RESERVE_SPACE(4);
2814
2815 /*
2816 * XXX: By default, the ->readlink() VFS op will truncate symlinks
2817 * if they would overflow the buffer. Is this kosher in NFSv4? If
2818 * not, one easy fix is: if ->readlink() precisely fills the buffer,
2819 * assume that truncation occurred, and return NFS4ERR_RESOURCE.
2820 */
2821 nfserr = nfsd_readlink(readlink->rl_rqstp, readlink->rl_fhp, page, &maxcount);
2822 if (nfserr == nfserr_isdir)
2823 return nfserr_inval;
2824 if (nfserr)
2825 return nfserr;
2826
2827 WRITE32(maxcount);
2828 ADJUST_ARGS();
NeilBrown6ed6dec2006-04-10 22:55:32 -07002829 resp->xbuf->head[0].iov_len = (char*)p
2830 - (char*)resp->xbuf->head[0].iov_base;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002831 resp->xbuf->page_len = maxcount;
NeilBrown6ed6dec2006-04-10 22:55:32 -07002832
2833 /* Use rest of head for padding and remaining ops: */
NeilBrown6ed6dec2006-04-10 22:55:32 -07002834 resp->xbuf->tail[0].iov_base = p;
2835 resp->xbuf->tail[0].iov_len = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002836 if (maxcount&3) {
NeilBrown6ed6dec2006-04-10 22:55:32 -07002837 RESERVE_SPACE(4);
2838 WRITE32(0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002839 resp->xbuf->tail[0].iov_base += maxcount&3;
2840 resp->xbuf->tail[0].iov_len = 4 - (maxcount&3);
NeilBrown6ed6dec2006-04-10 22:55:32 -07002841 ADJUST_ARGS();
Linus Torvalds1da177e2005-04-16 15:20:36 -07002842 }
2843 return 0;
2844}
2845
Al Virob37ad282006-10-19 23:28:59 -07002846static __be32
2847nfsd4_encode_readdir(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readdir *readdir)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002848{
2849 int maxcount;
2850 loff_t offset;
Al Viro2ebbc012006-10-19 23:28:58 -07002851 __be32 *page, *savep, *tailbase;
J. Bruce Fieldsbc749ca2009-04-07 16:55:27 -07002852 __be32 *p;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002853
2854 if (nfserr)
2855 return nfserr;
2856 if (resp->xbuf->page_len)
2857 return nfserr_resource;
2858
2859 RESERVE_SPACE(8); /* verifier */
2860 savep = p;
2861
2862 /* XXX: Following NFSv3, we ignore the READDIR verifier for now. */
2863 WRITE32(0);
2864 WRITE32(0);
2865 ADJUST_ARGS();
2866 resp->xbuf->head[0].iov_len = ((char*)resp->p) - (char*)resp->xbuf->head[0].iov_base;
NeilBrownbb6e8a92006-04-10 22:55:33 -07002867 tailbase = p;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002868
2869 maxcount = PAGE_SIZE;
2870 if (maxcount > readdir->rd_maxcount)
2871 maxcount = readdir->rd_maxcount;
2872
2873 /*
2874 * Convert from bytes to words, account for the two words already
2875 * written, make sure to leave two words at the end for the next
2876 * pointer and eof field.
2877 */
2878 maxcount = (maxcount >> 2) - 4;
2879 if (maxcount < 0) {
2880 nfserr = nfserr_toosmall;
2881 goto err_no_verf;
2882 }
2883
NeilBrown44524352006-10-04 02:15:46 -07002884 page = page_address(resp->rqstp->rq_respages[resp->rqstp->rq_resused++]);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002885 readdir->common.err = 0;
2886 readdir->buflen = maxcount;
2887 readdir->buffer = page;
2888 readdir->offset = NULL;
2889
2890 offset = readdir->rd_cookie;
2891 nfserr = nfsd_readdir(readdir->rd_rqstp, readdir->rd_fhp,
2892 &offset,
2893 &readdir->common, nfsd4_encode_dirent);
2894 if (nfserr == nfs_ok &&
2895 readdir->common.err == nfserr_toosmall &&
2896 readdir->buffer == page)
2897 nfserr = nfserr_toosmall;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002898 if (nfserr)
2899 goto err_no_verf;
2900
2901 if (readdir->offset)
2902 xdr_encode_hyper(readdir->offset, offset);
2903
2904 p = readdir->buffer;
2905 *p++ = 0; /* no more entries */
2906 *p++ = htonl(readdir->common.err == nfserr_eof);
NeilBrown44524352006-10-04 02:15:46 -07002907 resp->xbuf->page_len = ((char*)p) - (char*)page_address(
2908 resp->rqstp->rq_respages[resp->rqstp->rq_resused-1]);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002909
NeilBrownbb6e8a92006-04-10 22:55:33 -07002910 /* Use rest of head for padding and remaining ops: */
NeilBrownbb6e8a92006-04-10 22:55:33 -07002911 resp->xbuf->tail[0].iov_base = tailbase;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002912 resp->xbuf->tail[0].iov_len = 0;
2913 resp->p = resp->xbuf->tail[0].iov_base;
NeilBrownbb6e8a92006-04-10 22:55:33 -07002914 resp->end = resp->p + (PAGE_SIZE - resp->xbuf->head[0].iov_len)/4;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002915
2916 return 0;
2917err_no_verf:
2918 p = savep;
2919 ADJUST_ARGS();
2920 return nfserr;
2921}
2922
Benny Halevy695e12f2008-07-04 14:38:33 +03002923static __be32
Al Virob37ad282006-10-19 23:28:59 -07002924nfsd4_encode_remove(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_remove *remove)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002925{
J. Bruce Fieldsbc749ca2009-04-07 16:55:27 -07002926 __be32 *p;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002927
2928 if (!nfserr) {
2929 RESERVE_SPACE(20);
J. Bruce Fieldsc654b8a2009-04-16 17:33:25 -04002930 write_cinfo(&p, &remove->rm_cinfo);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002931 ADJUST_ARGS();
2932 }
Benny Halevy695e12f2008-07-04 14:38:33 +03002933 return nfserr;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002934}
2935
Benny Halevy695e12f2008-07-04 14:38:33 +03002936static __be32
Al Virob37ad282006-10-19 23:28:59 -07002937nfsd4_encode_rename(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_rename *rename)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002938{
J. Bruce Fieldsbc749ca2009-04-07 16:55:27 -07002939 __be32 *p;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002940
2941 if (!nfserr) {
2942 RESERVE_SPACE(40);
J. Bruce Fieldsc654b8a2009-04-16 17:33:25 -04002943 write_cinfo(&p, &rename->rn_sinfo);
2944 write_cinfo(&p, &rename->rn_tinfo);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002945 ADJUST_ARGS();
2946 }
Benny Halevy695e12f2008-07-04 14:38:33 +03002947 return nfserr;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002948}
2949
Benny Halevy695e12f2008-07-04 14:38:33 +03002950static __be32
Mi Jinlong22b6dee2010-12-27 14:29:57 +08002951nfsd4_do_encode_secinfo(struct nfsd4_compoundres *resp,
2952 __be32 nfserr,struct svc_export *exp)
Andy Adamsondcb488a32007-07-17 04:04:51 -07002953{
2954 int i = 0;
J. Bruce Fields4796f452007-07-17 04:04:51 -07002955 u32 nflavs;
2956 struct exp_flavor_info *flavs;
2957 struct exp_flavor_info def_flavs[2];
J. Bruce Fieldsbc749ca2009-04-07 16:55:27 -07002958 __be32 *p;
Andy Adamsondcb488a32007-07-17 04:04:51 -07002959
2960 if (nfserr)
2961 goto out;
J. Bruce Fields4796f452007-07-17 04:04:51 -07002962 if (exp->ex_nflavors) {
2963 flavs = exp->ex_flavors;
2964 nflavs = exp->ex_nflavors;
2965 } else { /* Handling of some defaults in absence of real secinfo: */
2966 flavs = def_flavs;
2967 if (exp->ex_client->flavour->flavour == RPC_AUTH_UNIX) {
2968 nflavs = 2;
2969 flavs[0].pseudoflavor = RPC_AUTH_UNIX;
2970 flavs[1].pseudoflavor = RPC_AUTH_NULL;
2971 } else if (exp->ex_client->flavour->flavour == RPC_AUTH_GSS) {
2972 nflavs = 1;
2973 flavs[0].pseudoflavor
2974 = svcauth_gss_flavor(exp->ex_client);
2975 } else {
2976 nflavs = 1;
2977 flavs[0].pseudoflavor
2978 = exp->ex_client->flavour->flavour;
2979 }
2980 }
2981
Andy Adamsondcb488a32007-07-17 04:04:51 -07002982 RESERVE_SPACE(4);
J. Bruce Fields4796f452007-07-17 04:04:51 -07002983 WRITE32(nflavs);
Andy Adamsondcb488a32007-07-17 04:04:51 -07002984 ADJUST_ARGS();
J. Bruce Fields4796f452007-07-17 04:04:51 -07002985 for (i = 0; i < nflavs; i++) {
2986 u32 flav = flavs[i].pseudoflavor;
Andy Adamsondcb488a32007-07-17 04:04:51 -07002987 struct gss_api_mech *gm = gss_mech_get_by_pseudoflavor(flav);
2988
2989 if (gm) {
2990 RESERVE_SPACE(4);
2991 WRITE32(RPC_AUTH_GSS);
2992 ADJUST_ARGS();
2993 RESERVE_SPACE(4 + gm->gm_oid.len);
2994 WRITE32(gm->gm_oid.len);
2995 WRITEMEM(gm->gm_oid.data, gm->gm_oid.len);
2996 ADJUST_ARGS();
2997 RESERVE_SPACE(4);
2998 WRITE32(0); /* qop */
2999 ADJUST_ARGS();
3000 RESERVE_SPACE(4);
3001 WRITE32(gss_pseudoflavor_to_service(gm, flav));
3002 ADJUST_ARGS();
3003 gss_mech_put(gm);
3004 } else {
3005 RESERVE_SPACE(4);
3006 WRITE32(flav);
3007 ADJUST_ARGS();
3008 }
3009 }
3010out:
3011 if (exp)
3012 exp_put(exp);
Benny Halevy695e12f2008-07-04 14:38:33 +03003013 return nfserr;
Andy Adamsondcb488a32007-07-17 04:04:51 -07003014}
3015
Mi Jinlong22b6dee2010-12-27 14:29:57 +08003016static __be32
3017nfsd4_encode_secinfo(struct nfsd4_compoundres *resp, __be32 nfserr,
3018 struct nfsd4_secinfo *secinfo)
3019{
3020 return nfsd4_do_encode_secinfo(resp, nfserr, secinfo->si_exp);
3021}
3022
3023static __be32
3024nfsd4_encode_secinfo_no_name(struct nfsd4_compoundres *resp, __be32 nfserr,
3025 struct nfsd4_secinfo_no_name *secinfo)
3026{
3027 return nfsd4_do_encode_secinfo(resp, nfserr, secinfo->sin_exp);
3028}
3029
Linus Torvalds1da177e2005-04-16 15:20:36 -07003030/*
3031 * The SETATTR encode routine is special -- it always encodes a bitmap,
3032 * regardless of the error status.
3033 */
Benny Halevy695e12f2008-07-04 14:38:33 +03003034static __be32
Al Virob37ad282006-10-19 23:28:59 -07003035nfsd4_encode_setattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setattr *setattr)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003036{
J. Bruce Fieldsbc749ca2009-04-07 16:55:27 -07003037 __be32 *p;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003038
3039 RESERVE_SPACE(12);
3040 if (nfserr) {
3041 WRITE32(2);
3042 WRITE32(0);
3043 WRITE32(0);
3044 }
3045 else {
3046 WRITE32(2);
3047 WRITE32(setattr->sa_bmval[0]);
3048 WRITE32(setattr->sa_bmval[1]);
3049 }
3050 ADJUST_ARGS();
Benny Halevy695e12f2008-07-04 14:38:33 +03003051 return nfserr;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003052}
3053
Benny Halevy695e12f2008-07-04 14:38:33 +03003054static __be32
Al Virob37ad282006-10-19 23:28:59 -07003055nfsd4_encode_setclientid(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setclientid *scd)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003056{
J. Bruce Fieldsbc749ca2009-04-07 16:55:27 -07003057 __be32 *p;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003058
3059 if (!nfserr) {
3060 RESERVE_SPACE(8 + sizeof(nfs4_verifier));
3061 WRITEMEM(&scd->se_clientid, 8);
3062 WRITEMEM(&scd->se_confirm, sizeof(nfs4_verifier));
3063 ADJUST_ARGS();
3064 }
3065 else if (nfserr == nfserr_clid_inuse) {
3066 RESERVE_SPACE(8);
3067 WRITE32(0);
3068 WRITE32(0);
3069 ADJUST_ARGS();
3070 }
Benny Halevy695e12f2008-07-04 14:38:33 +03003071 return nfserr;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003072}
3073
Benny Halevy695e12f2008-07-04 14:38:33 +03003074static __be32
Al Virob37ad282006-10-19 23:28:59 -07003075nfsd4_encode_write(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_write *write)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003076{
J. Bruce Fieldsbc749ca2009-04-07 16:55:27 -07003077 __be32 *p;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003078
3079 if (!nfserr) {
3080 RESERVE_SPACE(16);
3081 WRITE32(write->wr_bytes_written);
3082 WRITE32(write->wr_how_written);
3083 WRITEMEM(write->wr_verifier.data, 8);
3084 ADJUST_ARGS();
3085 }
Benny Halevy695e12f2008-07-04 14:38:33 +03003086 return nfserr;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003087}
3088
Benny Halevy695e12f2008-07-04 14:38:33 +03003089static __be32
Andy Adamson2db134e2009-04-03 08:27:55 +03003090nfsd4_encode_exchange_id(struct nfsd4_compoundres *resp, int nfserr,
3091 struct nfsd4_exchange_id *exid)
3092{
J. Bruce Fieldsbc749ca2009-04-07 16:55:27 -07003093 __be32 *p;
Andy Adamson0733d212009-04-03 08:28:01 +03003094 char *major_id;
3095 char *server_scope;
3096 int major_id_sz;
3097 int server_scope_sz;
3098 uint64_t minor_id = 0;
3099
3100 if (nfserr)
3101 return nfserr;
3102
3103 major_id = utsname()->nodename;
3104 major_id_sz = strlen(major_id);
3105 server_scope = utsname()->nodename;
3106 server_scope_sz = strlen(server_scope);
3107
3108 RESERVE_SPACE(
3109 8 /* eir_clientid */ +
3110 4 /* eir_sequenceid */ +
3111 4 /* eir_flags */ +
3112 4 /* spr_how (SP4_NONE) */ +
3113 8 /* so_minor_id */ +
3114 4 /* so_major_id.len */ +
3115 (XDR_QUADLEN(major_id_sz) * 4) +
3116 4 /* eir_server_scope.len */ +
3117 (XDR_QUADLEN(server_scope_sz) * 4) +
3118 4 /* eir_server_impl_id.count (0) */);
3119
3120 WRITEMEM(&exid->clientid, 8);
3121 WRITE32(exid->seqid);
3122 WRITE32(exid->flags);
3123
3124 /* state_protect4_r. Currently only support SP4_NONE */
3125 BUG_ON(exid->spa_how != SP4_NONE);
3126 WRITE32(exid->spa_how);
3127
3128 /* The server_owner struct */
3129 WRITE64(minor_id); /* Minor id */
3130 /* major id */
3131 WRITE32(major_id_sz);
3132 WRITEMEM(major_id, major_id_sz);
3133
3134 /* Server scope */
3135 WRITE32(server_scope_sz);
3136 WRITEMEM(server_scope, server_scope_sz);
3137
3138 /* Implementation id */
3139 WRITE32(0); /* zero length nfs_impl_id4 array */
3140 ADJUST_ARGS();
3141 return 0;
Andy Adamson2db134e2009-04-03 08:27:55 +03003142}
3143
3144static __be32
3145nfsd4_encode_create_session(struct nfsd4_compoundres *resp, int nfserr,
3146 struct nfsd4_create_session *sess)
3147{
J. Bruce Fieldsbc749ca2009-04-07 16:55:27 -07003148 __be32 *p;
Andy Adamsonec6b5d72009-04-03 08:28:28 +03003149
3150 if (nfserr)
3151 return nfserr;
3152
3153 RESERVE_SPACE(24);
3154 WRITEMEM(sess->sessionid.data, NFS4_MAX_SESSIONID_LEN);
3155 WRITE32(sess->seqid);
3156 WRITE32(sess->flags);
3157 ADJUST_ARGS();
3158
3159 RESERVE_SPACE(28);
3160 WRITE32(0); /* headerpadsz */
3161 WRITE32(sess->fore_channel.maxreq_sz);
3162 WRITE32(sess->fore_channel.maxresp_sz);
3163 WRITE32(sess->fore_channel.maxresp_cached);
3164 WRITE32(sess->fore_channel.maxops);
3165 WRITE32(sess->fore_channel.maxreqs);
3166 WRITE32(sess->fore_channel.nr_rdma_attrs);
3167 ADJUST_ARGS();
3168
3169 if (sess->fore_channel.nr_rdma_attrs) {
3170 RESERVE_SPACE(4);
3171 WRITE32(sess->fore_channel.rdma_attrs);
3172 ADJUST_ARGS();
3173 }
3174
3175 RESERVE_SPACE(28);
3176 WRITE32(0); /* headerpadsz */
3177 WRITE32(sess->back_channel.maxreq_sz);
3178 WRITE32(sess->back_channel.maxresp_sz);
3179 WRITE32(sess->back_channel.maxresp_cached);
3180 WRITE32(sess->back_channel.maxops);
3181 WRITE32(sess->back_channel.maxreqs);
3182 WRITE32(sess->back_channel.nr_rdma_attrs);
3183 ADJUST_ARGS();
3184
3185 if (sess->back_channel.nr_rdma_attrs) {
3186 RESERVE_SPACE(4);
3187 WRITE32(sess->back_channel.rdma_attrs);
3188 ADJUST_ARGS();
3189 }
3190 return 0;
Andy Adamson2db134e2009-04-03 08:27:55 +03003191}
3192
3193static __be32
3194nfsd4_encode_destroy_session(struct nfsd4_compoundres *resp, int nfserr,
3195 struct nfsd4_destroy_session *destroy_session)
3196{
Andy Adamson2db134e2009-04-03 08:27:55 +03003197 return nfserr;
3198}
3199
Daniel Mackc47d8322011-05-16 16:38:14 +02003200static __be32
Bryan Schumakere1ca12d2011-07-13 11:04:21 -04003201nfsd4_encode_free_stateid(struct nfsd4_compoundres *resp, int nfserr,
3202 struct nfsd4_free_stateid *free_stateid)
3203{
3204 __be32 *p;
3205
3206 if (nfserr)
3207 return nfserr;
3208
3209 RESERVE_SPACE(4);
3210 WRITE32(nfserr);
3211 ADJUST_ARGS();
3212 return nfserr;
3213}
3214
3215static __be32
Andy Adamson2db134e2009-04-03 08:27:55 +03003216nfsd4_encode_sequence(struct nfsd4_compoundres *resp, int nfserr,
3217 struct nfsd4_sequence *seq)
3218{
J. Bruce Fieldsbc749ca2009-04-07 16:55:27 -07003219 __be32 *p;
Benny Halevyb85d4c02009-04-03 08:28:08 +03003220
3221 if (nfserr)
3222 return nfserr;
3223
3224 RESERVE_SPACE(NFS4_MAX_SESSIONID_LEN + 20);
3225 WRITEMEM(seq->sessionid.data, NFS4_MAX_SESSIONID_LEN);
3226 WRITE32(seq->seqid);
3227 WRITE32(seq->slotid);
J. Bruce Fieldsb7d7ca32011-08-31 15:39:30 -04003228 /* Note slotid's are numbered from zero: */
3229 WRITE32(seq->maxslots - 1); /* sr_highest_slotid */
3230 WRITE32(seq->maxslots - 1); /* sr_target_highest_slotid */
J. Bruce Fields0d7bb712010-11-18 08:30:33 -05003231 WRITE32(seq->status_flags);
Benny Halevyb85d4c02009-04-03 08:28:08 +03003232
3233 ADJUST_ARGS();
Andy Adamson557ce262009-08-28 08:45:04 -04003234 resp->cstate.datap = p; /* DRC cache data pointer */
Benny Halevyb85d4c02009-04-03 08:28:08 +03003235 return 0;
Andy Adamson2db134e2009-04-03 08:27:55 +03003236}
3237
Bryan Schumaker17456802011-07-13 10:50:48 -04003238__be32
3239nfsd4_encode_test_stateid(struct nfsd4_compoundres *resp, int nfserr,
3240 struct nfsd4_test_stateid *test_stateid)
3241{
3242 struct nfsd4_compoundargs *argp;
3243 stateid_t si;
3244 __be32 *p;
3245 int i;
3246 int valid;
3247
3248 restore_buf(test_stateid->ts_saved_args, &test_stateid->ts_savedp);
3249 argp = test_stateid->ts_saved_args;
3250
3251 RESERVE_SPACE(4);
3252 *p++ = htonl(test_stateid->ts_num_ids);
3253 resp->p = p;
3254
3255 nfs4_lock_state();
3256 for (i = 0; i < test_stateid->ts_num_ids; i++) {
3257 nfsd4_decode_stateid(argp, &si);
3258 valid = nfs4_validate_stateid(&si, test_stateid->ts_has_session);
3259 RESERVE_SPACE(4);
3260 *p++ = htonl(valid);
3261 resp->p = p;
3262 }
3263 nfs4_unlock_state();
3264
3265 return nfserr;
3266}
3267
Andy Adamson2db134e2009-04-03 08:27:55 +03003268static __be32
Benny Halevy695e12f2008-07-04 14:38:33 +03003269nfsd4_encode_noop(struct nfsd4_compoundres *resp, __be32 nfserr, void *p)
3270{
3271 return nfserr;
3272}
3273
3274typedef __be32(* nfsd4_enc)(struct nfsd4_compoundres *, __be32, void *);
3275
Andy Adamson2db134e2009-04-03 08:27:55 +03003276/*
3277 * Note: nfsd4_enc_ops vector is shared for v4.0 and v4.1
3278 * since we don't need to filter out obsolete ops as this is
3279 * done in the decoding phase.
3280 */
Benny Halevy695e12f2008-07-04 14:38:33 +03003281static nfsd4_enc nfsd4_enc_ops[] = {
J. Bruce Fieldsad1060c2008-07-18 15:04:16 -04003282 [OP_ACCESS] = (nfsd4_enc)nfsd4_encode_access,
3283 [OP_CLOSE] = (nfsd4_enc)nfsd4_encode_close,
3284 [OP_COMMIT] = (nfsd4_enc)nfsd4_encode_commit,
3285 [OP_CREATE] = (nfsd4_enc)nfsd4_encode_create,
3286 [OP_DELEGPURGE] = (nfsd4_enc)nfsd4_encode_noop,
3287 [OP_DELEGRETURN] = (nfsd4_enc)nfsd4_encode_noop,
3288 [OP_GETATTR] = (nfsd4_enc)nfsd4_encode_getattr,
3289 [OP_GETFH] = (nfsd4_enc)nfsd4_encode_getfh,
3290 [OP_LINK] = (nfsd4_enc)nfsd4_encode_link,
3291 [OP_LOCK] = (nfsd4_enc)nfsd4_encode_lock,
3292 [OP_LOCKT] = (nfsd4_enc)nfsd4_encode_lockt,
3293 [OP_LOCKU] = (nfsd4_enc)nfsd4_encode_locku,
3294 [OP_LOOKUP] = (nfsd4_enc)nfsd4_encode_noop,
3295 [OP_LOOKUPP] = (nfsd4_enc)nfsd4_encode_noop,
3296 [OP_NVERIFY] = (nfsd4_enc)nfsd4_encode_noop,
3297 [OP_OPEN] = (nfsd4_enc)nfsd4_encode_open,
Benny Halevy84f09f42009-03-04 23:05:35 +02003298 [OP_OPENATTR] = (nfsd4_enc)nfsd4_encode_noop,
J. Bruce Fieldsad1060c2008-07-18 15:04:16 -04003299 [OP_OPEN_CONFIRM] = (nfsd4_enc)nfsd4_encode_open_confirm,
3300 [OP_OPEN_DOWNGRADE] = (nfsd4_enc)nfsd4_encode_open_downgrade,
3301 [OP_PUTFH] = (nfsd4_enc)nfsd4_encode_noop,
3302 [OP_PUTPUBFH] = (nfsd4_enc)nfsd4_encode_noop,
3303 [OP_PUTROOTFH] = (nfsd4_enc)nfsd4_encode_noop,
3304 [OP_READ] = (nfsd4_enc)nfsd4_encode_read,
3305 [OP_READDIR] = (nfsd4_enc)nfsd4_encode_readdir,
3306 [OP_READLINK] = (nfsd4_enc)nfsd4_encode_readlink,
3307 [OP_REMOVE] = (nfsd4_enc)nfsd4_encode_remove,
3308 [OP_RENAME] = (nfsd4_enc)nfsd4_encode_rename,
3309 [OP_RENEW] = (nfsd4_enc)nfsd4_encode_noop,
3310 [OP_RESTOREFH] = (nfsd4_enc)nfsd4_encode_noop,
3311 [OP_SAVEFH] = (nfsd4_enc)nfsd4_encode_noop,
3312 [OP_SECINFO] = (nfsd4_enc)nfsd4_encode_secinfo,
3313 [OP_SETATTR] = (nfsd4_enc)nfsd4_encode_setattr,
3314 [OP_SETCLIENTID] = (nfsd4_enc)nfsd4_encode_setclientid,
3315 [OP_SETCLIENTID_CONFIRM] = (nfsd4_enc)nfsd4_encode_noop,
3316 [OP_VERIFY] = (nfsd4_enc)nfsd4_encode_noop,
3317 [OP_WRITE] = (nfsd4_enc)nfsd4_encode_write,
3318 [OP_RELEASE_LOCKOWNER] = (nfsd4_enc)nfsd4_encode_noop,
Andy Adamson2db134e2009-04-03 08:27:55 +03003319
3320 /* NFSv4.1 operations */
3321 [OP_BACKCHANNEL_CTL] = (nfsd4_enc)nfsd4_encode_noop,
J. Bruce Fields1d1bc8f2010-10-04 23:12:59 -04003322 [OP_BIND_CONN_TO_SESSION] = (nfsd4_enc)nfsd4_encode_bind_conn_to_session,
Andy Adamson2db134e2009-04-03 08:27:55 +03003323 [OP_EXCHANGE_ID] = (nfsd4_enc)nfsd4_encode_exchange_id,
3324 [OP_CREATE_SESSION] = (nfsd4_enc)nfsd4_encode_create_session,
3325 [OP_DESTROY_SESSION] = (nfsd4_enc)nfsd4_encode_destroy_session,
Bryan Schumakere1ca12d2011-07-13 11:04:21 -04003326 [OP_FREE_STATEID] = (nfsd4_enc)nfsd4_encode_free_stateid,
Andy Adamson2db134e2009-04-03 08:27:55 +03003327 [OP_GET_DIR_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop,
3328 [OP_GETDEVICEINFO] = (nfsd4_enc)nfsd4_encode_noop,
3329 [OP_GETDEVICELIST] = (nfsd4_enc)nfsd4_encode_noop,
3330 [OP_LAYOUTCOMMIT] = (nfsd4_enc)nfsd4_encode_noop,
3331 [OP_LAYOUTGET] = (nfsd4_enc)nfsd4_encode_noop,
3332 [OP_LAYOUTRETURN] = (nfsd4_enc)nfsd4_encode_noop,
Mi Jinlong22b6dee2010-12-27 14:29:57 +08003333 [OP_SECINFO_NO_NAME] = (nfsd4_enc)nfsd4_encode_secinfo_no_name,
Andy Adamson2db134e2009-04-03 08:27:55 +03003334 [OP_SEQUENCE] = (nfsd4_enc)nfsd4_encode_sequence,
3335 [OP_SET_SSV] = (nfsd4_enc)nfsd4_encode_noop,
Bryan Schumaker17456802011-07-13 10:50:48 -04003336 [OP_TEST_STATEID] = (nfsd4_enc)nfsd4_encode_test_stateid,
Andy Adamson2db134e2009-04-03 08:27:55 +03003337 [OP_WANT_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop,
3338 [OP_DESTROY_CLIENTID] = (nfsd4_enc)nfsd4_encode_noop,
3339 [OP_RECLAIM_COMPLETE] = (nfsd4_enc)nfsd4_encode_noop,
Benny Halevy695e12f2008-07-04 14:38:33 +03003340};
3341
Andy Adamson496c2622009-04-03 08:28:48 +03003342/*
3343 * Calculate the total amount of memory that the compound response has taken
3344 * after encoding the current operation.
3345 *
3346 * pad: add on 8 bytes for the next operation's op_code and status so that
3347 * there is room to cache a failure on the next operation.
3348 *
3349 * Compare this length to the session se_fmaxresp_cached.
3350 *
3351 * Our se_fmaxresp_cached will always be a multiple of PAGE_SIZE, and so
3352 * will be at least a page and will therefore hold the xdr_buf head.
3353 */
3354static int nfsd4_check_drc_limit(struct nfsd4_compoundres *resp)
3355{
3356 int status = 0;
3357 struct xdr_buf *xb = &resp->rqstp->rq_res;
3358 struct nfsd4_compoundargs *args = resp->rqstp->rq_argp;
3359 struct nfsd4_session *session = NULL;
3360 struct nfsd4_slot *slot = resp->cstate.slot;
3361 u32 length, tlen = 0, pad = 8;
3362
3363 if (!nfsd4_has_session(&resp->cstate))
3364 return status;
3365
3366 session = resp->cstate.session;
Andy Adamson557ce262009-08-28 08:45:04 -04003367 if (session == NULL || slot->sl_cachethis == 0)
Andy Adamson496c2622009-04-03 08:28:48 +03003368 return status;
3369
3370 if (resp->opcnt >= args->opcnt)
3371 pad = 0; /* this is the last operation */
3372
3373 if (xb->page_len == 0) {
3374 length = (char *)resp->p - (char *)xb->head[0].iov_base + pad;
3375 } else {
3376 if (xb->tail[0].iov_base && xb->tail[0].iov_len > 0)
3377 tlen = (char *)resp->p - (char *)xb->tail[0].iov_base;
3378
3379 length = xb->head[0].iov_len + xb->page_len + tlen + pad;
3380 }
3381 dprintk("%s length %u, xb->page_len %u tlen %u pad %u\n", __func__,
3382 length, xb->page_len, tlen, pad);
3383
Alexandros Batsakis6c18ba92009-06-16 04:19:13 +03003384 if (length <= session->se_fchannel.maxresp_cached)
Andy Adamson496c2622009-04-03 08:28:48 +03003385 return status;
3386 else
3387 return nfserr_rep_too_big_to_cache;
3388}
3389
Linus Torvalds1da177e2005-04-16 15:20:36 -07003390void
3391nfsd4_encode_operation(struct nfsd4_compoundres *resp, struct nfsd4_op *op)
3392{
Al Viro2ebbc012006-10-19 23:28:58 -07003393 __be32 *statp;
J. Bruce Fieldsbc749ca2009-04-07 16:55:27 -07003394 __be32 *p;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003395
3396 RESERVE_SPACE(8);
3397 WRITE32(op->opnum);
3398 statp = p++; /* to be backfilled at the end */
3399 ADJUST_ARGS();
3400
Benny Halevy695e12f2008-07-04 14:38:33 +03003401 if (op->opnum == OP_ILLEGAL)
3402 goto status;
3403 BUG_ON(op->opnum < 0 || op->opnum >= ARRAY_SIZE(nfsd4_enc_ops) ||
3404 !nfsd4_enc_ops[op->opnum]);
3405 op->status = nfsd4_enc_ops[op->opnum](resp, op->status, &op->u);
Andy Adamson496c2622009-04-03 08:28:48 +03003406 /* nfsd4_check_drc_limit guarantees enough room for error status */
3407 if (!op->status && nfsd4_check_drc_limit(resp))
3408 op->status = nfserr_rep_too_big_to_cache;
Benny Halevy695e12f2008-07-04 14:38:33 +03003409status:
Linus Torvalds1da177e2005-04-16 15:20:36 -07003410 /*
3411 * Note: We write the status directly, instead of using WRITE32(),
3412 * since it is already in network byte order.
3413 */
3414 *statp = op->status;
3415}
3416
3417/*
3418 * Encode the reply stored in the stateowner reply cache
3419 *
3420 * XDR note: do not encode rp->rp_buflen: the buffer contains the
3421 * previously sent already encoded operation.
3422 *
3423 * called with nfs4_lock_state() held
3424 */
3425void
3426nfsd4_encode_replay(struct nfsd4_compoundres *resp, struct nfsd4_op *op)
3427{
J. Bruce Fieldsbc749ca2009-04-07 16:55:27 -07003428 __be32 *p;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003429 struct nfs4_replay *rp = op->replay;
3430
3431 BUG_ON(!rp);
3432
3433 RESERVE_SPACE(8);
3434 WRITE32(op->opnum);
3435 *p++ = rp->rp_status; /* already xdr'ed */
3436 ADJUST_ARGS();
3437
3438 RESERVE_SPACE(rp->rp_buflen);
3439 WRITEMEM(rp->rp_buf, rp->rp_buflen);
3440 ADJUST_ARGS();
3441}
3442
Linus Torvalds1da177e2005-04-16 15:20:36 -07003443int
Al Viro2ebbc012006-10-19 23:28:58 -07003444nfs4svc_encode_voidres(struct svc_rqst *rqstp, __be32 *p, void *dummy)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003445{
3446 return xdr_ressize_check(rqstp, p);
3447}
3448
J. Bruce Fields3e98abf2011-07-16 17:15:10 -04003449int nfsd4_release_compoundargs(void *rq, __be32 *p, void *resp)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003450{
J. Bruce Fields3e98abf2011-07-16 17:15:10 -04003451 struct svc_rqst *rqstp = rq;
3452 struct nfsd4_compoundargs *args = rqstp->rq_argp;
3453
Linus Torvalds1da177e2005-04-16 15:20:36 -07003454 if (args->ops != args->iops) {
3455 kfree(args->ops);
3456 args->ops = args->iops;
3457 }
Jesper Juhlf99d49a2005-11-07 01:01:34 -08003458 kfree(args->tmpp);
3459 args->tmpp = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003460 while (args->to_free) {
3461 struct tmpbuf *tb = args->to_free;
3462 args->to_free = tb->next;
3463 tb->release(tb->buf);
3464 kfree(tb);
3465 }
J. Bruce Fields3e98abf2011-07-16 17:15:10 -04003466 return 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003467}
3468
3469int
Al Viro2ebbc012006-10-19 23:28:58 -07003470nfs4svc_decode_compoundargs(struct svc_rqst *rqstp, __be32 *p, struct nfsd4_compoundargs *args)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003471{
Linus Torvalds1da177e2005-04-16 15:20:36 -07003472 args->p = p;
3473 args->end = rqstp->rq_arg.head[0].iov_base + rqstp->rq_arg.head[0].iov_len;
3474 args->pagelist = rqstp->rq_arg.pages;
3475 args->pagelen = rqstp->rq_arg.page_len;
3476 args->tmpp = NULL;
3477 args->to_free = NULL;
3478 args->ops = args->iops;
3479 args->rqstp = rqstp;
3480
J. Bruce Fields3e98abf2011-07-16 17:15:10 -04003481 return !nfsd4_decode_compound(args);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003482}
3483
3484int
Al Viro2ebbc012006-10-19 23:28:58 -07003485nfs4svc_encode_compoundres(struct svc_rqst *rqstp, __be32 *p, struct nfsd4_compoundres *resp)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003486{
3487 /*
3488 * All that remains is to write the tag and operation count...
3489 */
Andy Adamson557ce262009-08-28 08:45:04 -04003490 struct nfsd4_compound_state *cs = &resp->cstate;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003491 struct kvec *iov;
3492 p = resp->tagp;
3493 *p++ = htonl(resp->taglen);
3494 memcpy(p, resp->tag, resp->taglen);
3495 p += XDR_QUADLEN(resp->taglen);
3496 *p++ = htonl(resp->opcnt);
3497
3498 if (rqstp->rq_res.page_len)
3499 iov = &rqstp->rq_res.tail[0];
3500 else
3501 iov = &rqstp->rq_res.head[0];
3502 iov->iov_len = ((char*)resp->p) - (char*)iov->iov_base;
3503 BUG_ON(iov->iov_len > PAGE_SIZE);
J. Bruce Fields26c0c752010-04-24 15:35:43 -04003504 if (nfsd4_has_session(cs)) {
3505 if (cs->status != nfserr_replay_cache) {
3506 nfsd4_store_cache_entry(resp);
3507 dprintk("%s: SET SLOT STATE TO AVAILABLE\n", __func__);
Benny Halevydbd65a72010-05-03 19:31:33 +03003508 cs->slot->sl_inuse = false;
J. Bruce Fields26c0c752010-04-24 15:35:43 -04003509 }
Benny Halevyd7682982010-05-12 00:13:54 +03003510 /* Renew the clientid on success and on replay */
3511 release_session_client(cs->session);
J. Bruce Fields76407f72010-06-22 14:10:14 -04003512 nfsd4_put_session(cs->session);
Andy Adamsonda3846a2009-04-03 08:28:22 +03003513 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07003514 return 1;
3515}
3516
3517/*
3518 * Local variables:
3519 * c-basic-offset: 8
3520 * End:
3521 */