blob: 29b7e63cb32c42aaf23d4852abdf12f4792557e2 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 * fs/nfsd/nfs4proc.c
3 *
4 * Server-side procedures for NFSv4.
5 *
6 * Copyright (c) 2002 The Regents of the University of Michigan.
7 * All rights reserved.
8 *
9 * Kendrick Smith <kmsmith@umich.edu>
10 * Andy Adamson <andros@umich.edu>
11 *
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
14 * are met:
15 *
16 * 1. Redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer.
18 * 2. Redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution.
21 * 3. Neither the name of the University nor the names of its
22 * contributors may be used to endorse or promote products derived
23 * from this software without specific prior written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
26 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
27 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
28 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
32 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
33 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
34 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
35 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
Linus Torvalds1da177e2005-04-16 15:20:36 -070036 */
37
38#include <linux/param.h>
39#include <linux/major.h>
40#include <linux/slab.h>
NeilBrown7e06b7f2005-06-23 22:03:13 -070041#include <linux/file.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070042
43#include <linux/sunrpc/svc.h>
44#include <linux/nfsd/nfsd.h>
45#include <linux/nfsd/cache.h>
46#include <linux/nfs4.h>
47#include <linux/nfsd/state.h>
48#include <linux/nfsd/xdr4.h>
49#include <linux/nfs4_acl.h>
Andy Adamsondcb488a2007-07-17 04:04:51 -070050#include <linux/sunrpc/gss_api.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070051
52#define NFSDDBG_FACILITY NFSDDBG_PROC
53
54static inline void
55fh_dup2(struct svc_fh *dst, struct svc_fh *src)
56{
57 fh_put(dst);
58 dget(src->fh_dentry);
59 if (src->fh_export)
60 cache_get(&src->fh_export->h);
61 *dst = *src;
62}
63
Al Virob37ad282006-10-19 23:28:59 -070064static __be32
J. Bruce Fieldsdc730e12006-10-17 00:10:13 -070065do_open_permission(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open, int accmode)
Linus Torvalds1da177e2005-04-16 15:20:36 -070066{
Al Virob37ad282006-10-19 23:28:59 -070067 __be32 status;
Linus Torvalds1da177e2005-04-16 15:20:36 -070068
69 if (open->op_truncate &&
70 !(open->op_share_access & NFS4_SHARE_ACCESS_WRITE))
71 return nfserr_inval;
72
Linus Torvalds1da177e2005-04-16 15:20:36 -070073 if (open->op_share_access & NFS4_SHARE_ACCESS_READ)
J. Bruce Fieldsdc730e12006-10-17 00:10:13 -070074 accmode |= MAY_READ;
J. Bruce Fields9801d8a2006-10-17 00:10:14 -070075 if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE)
Linus Torvalds1da177e2005-04-16 15:20:36 -070076 accmode |= (MAY_WRITE | MAY_TRUNC);
J. Bruce Fields9801d8a2006-10-17 00:10:14 -070077 if (open->op_share_deny & NFS4_SHARE_DENY_WRITE)
78 accmode |= MAY_WRITE;
Linus Torvalds1da177e2005-04-16 15:20:36 -070079
80 status = fh_verify(rqstp, current_fh, S_IFREG, accmode);
81
82 return status;
83}
84
Al Virob37ad282006-10-19 23:28:59 -070085static __be32
Linus Torvalds1da177e2005-04-16 15:20:36 -070086do_open_lookup(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open)
87{
88 struct svc_fh resfh;
Al Virob37ad282006-10-19 23:28:59 -070089 __be32 status;
J. Bruce Fields81ac95c2006-11-08 17:44:40 -080090 int created = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -070091
92 fh_init(&resfh, NFS4_FHSIZE);
93 open->op_truncate = 0;
94
95 if (open->op_create) {
96 /*
97 * Note: create modes (UNCHECKED,GUARDED...) are the same
98 * in NFSv4 as in v3.
99 */
100 status = nfsd_create_v3(rqstp, current_fh, open->op_fname.data,
101 open->op_fname.len, &open->op_iattr,
102 &resfh, open->op_createmode,
Jeff Layton749997e2007-07-31 00:37:51 -0700103 (u32 *)open->op_verf.data,
104 &open->op_truncate, &created);
105
106 /* If we ever decide to use different attrs to store the
107 * verifier in nfsd_create_v3, then we'll need to change this
108 */
109 if (open->op_createmode == NFS4_CREATE_EXCLUSIVE && status == 0)
110 open->op_bmval[1] |= (FATTR4_WORD1_TIME_ACCESS |
111 FATTR4_WORD1_TIME_MODIFY);
J. Bruce Fieldsaf858522006-11-08 17:44:39 -0800112 } else {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700113 status = nfsd_lookup(rqstp, current_fh,
114 open->op_fname.data, open->op_fname.len, &resfh);
115 fh_unlock(current_fh);
116 }
J. Bruce Fieldsaf858522006-11-08 17:44:39 -0800117 if (status)
118 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700119
J. Bruce Fieldsaf858522006-11-08 17:44:39 -0800120 set_change_info(&open->op_cinfo, current_fh);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700121
J. Bruce Fieldsaf858522006-11-08 17:44:39 -0800122 /* set reply cache */
123 fh_dup2(current_fh, &resfh);
124 open->op_stateowner->so_replay.rp_openfh_len = resfh.fh_handle.fh_size;
125 memcpy(open->op_stateowner->so_replay.rp_openfh,
126 &resfh.fh_handle.fh_base, resfh.fh_handle.fh_size);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700127
J. Bruce Fields81ac95c2006-11-08 17:44:40 -0800128 if (!created)
129 status = do_open_permission(rqstp, current_fh, open, MAY_NOP);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700130
J. Bruce Fieldsaf858522006-11-08 17:44:39 -0800131out:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700132 fh_put(&resfh);
133 return status;
134}
135
Al Virob37ad282006-10-19 23:28:59 -0700136static __be32
Linus Torvalds1da177e2005-04-16 15:20:36 -0700137do_open_fhandle(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open)
138{
Al Virob37ad282006-10-19 23:28:59 -0700139 __be32 status;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700140
141 /* Only reclaims from previously confirmed clients are valid */
142 if ((status = nfs4_check_open_reclaim(&open->op_clientid)))
143 return status;
144
145 /* We don't know the target directory, and therefore can not
146 * set the change info
147 */
148
149 memset(&open->op_cinfo, 0, sizeof(struct nfsd4_change_info));
150
151 /* set replay cache */
152 open->op_stateowner->so_replay.rp_openfh_len = current_fh->fh_handle.fh_size;
153 memcpy(open->op_stateowner->so_replay.rp_openfh,
154 &current_fh->fh_handle.fh_base,
155 current_fh->fh_handle.fh_size);
156
157 open->op_truncate = (open->op_iattr.ia_valid & ATTR_SIZE) &&
158 (open->op_iattr.ia_size == 0);
159
J. Bruce Fieldsdc730e12006-10-17 00:10:13 -0700160 status = do_open_permission(rqstp, current_fh, open, MAY_OWNER_OVERRIDE);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700161
162 return status;
163}
164
165
J.Bruce Fields71911552006-12-13 00:35:29 -0800166static __be32
J.Bruce Fieldsca364312006-12-13 00:35:27 -0800167nfsd4_open(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
J.Bruce Fieldsa4f1706a92006-12-13 00:35:28 -0800168 struct nfsd4_open *open)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700169{
Al Virob37ad282006-10-19 23:28:59 -0700170 __be32 status;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700171 dprintk("NFSD: nfsd4_open filename %.*s op_stateowner %p\n",
172 (int)open->op_fname.len, open->op_fname.data,
173 open->op_stateowner);
174
Linus Torvalds1da177e2005-04-16 15:20:36 -0700175 /* This check required by spec. */
176 if (open->op_create && open->op_claim_type != NFS4_OPEN_CLAIM_NULL)
177 return nfserr_inval;
178
179 nfs4_lock_state();
180
181 /* check seqid for replay. set nfs4_owner */
182 status = nfsd4_process_open1(open);
Al Viroa90b0612006-10-19 23:29:03 -0700183 if (status == nfserr_replay_me) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700184 struct nfs4_replay *rp = &open->op_stateowner->so_replay;
J.Bruce Fieldsca364312006-12-13 00:35:27 -0800185 fh_put(&cstate->current_fh);
186 cstate->current_fh.fh_handle.fh_size = rp->rp_openfh_len;
187 memcpy(&cstate->current_fh.fh_handle.fh_base, rp->rp_openfh,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700188 rp->rp_openfh_len);
J.Bruce Fieldsca364312006-12-13 00:35:27 -0800189 status = fh_verify(rqstp, &cstate->current_fh, 0, MAY_NOP);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700190 if (status)
191 dprintk("nfsd4_open: replay failed"
192 " restoring previous filehandle\n");
193 else
Al Viroa90b0612006-10-19 23:29:03 -0700194 status = nfserr_replay_me;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700195 }
196 if (status)
197 goto out;
J. Bruce Fieldsfb553c02006-01-18 17:43:36 -0800198
199 /* Openowner is now set, so sequence id will get bumped. Now we need
200 * these checks before we do any creates: */
J. Bruce Fieldscbd0d512006-02-07 12:58:32 -0800201 status = nfserr_grace;
J. Bruce Fieldsfb553c02006-01-18 17:43:36 -0800202 if (nfs4_in_grace() && open->op_claim_type != NFS4_OPEN_CLAIM_PREVIOUS)
J. Bruce Fieldscbd0d512006-02-07 12:58:32 -0800203 goto out;
204 status = nfserr_no_grace;
J. Bruce Fieldsfb553c02006-01-18 17:43:36 -0800205 if (!nfs4_in_grace() && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS)
J. Bruce Fieldscbd0d512006-02-07 12:58:32 -0800206 goto out;
J. Bruce Fieldsfb553c02006-01-18 17:43:36 -0800207
Linus Torvalds1da177e2005-04-16 15:20:36 -0700208 switch (open->op_claim_type) {
NeilBrown0dd3c192005-06-23 22:02:56 -0700209 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
210 status = nfserr_inval;
211 if (open->op_create)
212 goto out;
213 /* fall through */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700214 case NFS4_OPEN_CLAIM_NULL:
215 /*
216 * (1) set CURRENT_FH to the file being opened,
217 * creating it if necessary, (2) set open->op_cinfo,
218 * (3) set open->op_truncate if the file is to be
219 * truncated after opening, (4) do permission checking.
220 */
J.Bruce Fieldsca364312006-12-13 00:35:27 -0800221 status = do_open_lookup(rqstp, &cstate->current_fh,
222 open);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700223 if (status)
224 goto out;
225 break;
226 case NFS4_OPEN_CLAIM_PREVIOUS:
J. Bruce Fieldsa5258252006-01-18 17:43:30 -0800227 open->op_stateowner->so_confirmed = 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700228 /*
229 * The CURRENT_FH is already set to the file being
230 * opened. (1) set open->op_cinfo, (2) set
231 * open->op_truncate if the file is to be truncated
232 * after opening, (3) do permission checking.
233 */
J.Bruce Fieldsca364312006-12-13 00:35:27 -0800234 status = do_open_fhandle(rqstp, &cstate->current_fh,
235 open);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700236 if (status)
237 goto out;
238 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700239 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
J. Bruce Fieldsa5258252006-01-18 17:43:30 -0800240 open->op_stateowner->so_confirmed = 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700241 printk("NFSD: unsupported OPEN claim type %d\n",
242 open->op_claim_type);
243 status = nfserr_notsupp;
244 goto out;
245 default:
246 printk("NFSD: Invalid OPEN claim type %d\n",
247 open->op_claim_type);
248 status = nfserr_inval;
249 goto out;
250 }
251 /*
252 * nfsd4_process_open2() does the actual opening of the file. If
253 * successful, it (1) truncates the file if open->op_truncate was
254 * set, (2) sets open->op_stateid, (3) sets open->op_delegation.
255 */
J.Bruce Fieldsca364312006-12-13 00:35:27 -0800256 status = nfsd4_process_open2(rqstp, &cstate->current_fh, open);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700257out:
Neil Brownf2327d92005-09-13 01:25:37 -0700258 if (open->op_stateowner) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700259 nfs4_get_stateowner(open->op_stateowner);
J.Bruce Fieldsa4f1706a92006-12-13 00:35:28 -0800260 cstate->replay_owner = open->op_stateowner;
Neil Brownf2327d92005-09-13 01:25:37 -0700261 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700262 nfs4_unlock_state();
263 return status;
264}
265
266/*
267 * filehandle-manipulating ops.
268 */
J.Bruce Fields71911552006-12-13 00:35:29 -0800269static __be32
J.Bruce Fieldsb5914802006-12-13 00:35:38 -0800270nfsd4_getfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
271 struct svc_fh **getfh)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700272{
J.Bruce Fieldsca364312006-12-13 00:35:27 -0800273 if (!cstate->current_fh.fh_dentry)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700274 return nfserr_nofilehandle;
275
J.Bruce Fieldsca364312006-12-13 00:35:27 -0800276 *getfh = &cstate->current_fh;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700277 return nfs_ok;
278}
279
J.Bruce Fields71911552006-12-13 00:35:29 -0800280static __be32
J.Bruce Fieldsca364312006-12-13 00:35:27 -0800281nfsd4_putfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
282 struct nfsd4_putfh *putfh)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700283{
J.Bruce Fieldsca364312006-12-13 00:35:27 -0800284 fh_put(&cstate->current_fh);
285 cstate->current_fh.fh_handle.fh_size = putfh->pf_fhlen;
286 memcpy(&cstate->current_fh.fh_handle.fh_base, putfh->pf_fhval,
287 putfh->pf_fhlen);
288 return fh_verify(rqstp, &cstate->current_fh, 0, MAY_NOP);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700289}
290
J.Bruce Fields71911552006-12-13 00:35:29 -0800291static __be32
J.Bruce Fieldsb5914802006-12-13 00:35:38 -0800292nfsd4_putrootfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
293 void *arg)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700294{
Al Virob37ad282006-10-19 23:28:59 -0700295 __be32 status;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700296
J.Bruce Fieldsca364312006-12-13 00:35:27 -0800297 fh_put(&cstate->current_fh);
J. Bruce Fieldsdf547ef2007-07-17 04:04:43 -0700298 status = exp_pseudoroot(rqstp, &cstate->current_fh);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700299 return status;
300}
301
J.Bruce Fields71911552006-12-13 00:35:29 -0800302static __be32
J.Bruce Fieldsb5914802006-12-13 00:35:38 -0800303nfsd4_restorefh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
304 void *arg)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700305{
J.Bruce Fieldsca364312006-12-13 00:35:27 -0800306 if (!cstate->save_fh.fh_dentry)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700307 return nfserr_restorefh;
308
J.Bruce Fieldsca364312006-12-13 00:35:27 -0800309 fh_dup2(&cstate->current_fh, &cstate->save_fh);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700310 return nfs_ok;
311}
312
J.Bruce Fields71911552006-12-13 00:35:29 -0800313static __be32
J.Bruce Fieldsb5914802006-12-13 00:35:38 -0800314nfsd4_savefh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
315 void *arg)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700316{
J.Bruce Fieldsca364312006-12-13 00:35:27 -0800317 if (!cstate->current_fh.fh_dentry)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700318 return nfserr_nofilehandle;
319
J.Bruce Fieldsca364312006-12-13 00:35:27 -0800320 fh_dup2(&cstate->save_fh, &cstate->current_fh);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700321 return nfs_ok;
322}
323
324/*
325 * misc nfsv4 ops
326 */
J.Bruce Fields71911552006-12-13 00:35:29 -0800327static __be32
J.Bruce Fieldsca364312006-12-13 00:35:27 -0800328nfsd4_access(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
329 struct nfsd4_access *access)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700330{
331 if (access->ac_req_access & ~NFS3_ACCESS_FULL)
332 return nfserr_inval;
333
334 access->ac_resp_access = access->ac_req_access;
J.Bruce Fieldsca364312006-12-13 00:35:27 -0800335 return nfsd_access(rqstp, &cstate->current_fh, &access->ac_resp_access,
336 &access->ac_supported);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700337}
338
J.Bruce Fields71911552006-12-13 00:35:29 -0800339static __be32
J.Bruce Fieldsca364312006-12-13 00:35:27 -0800340nfsd4_commit(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
341 struct nfsd4_commit *commit)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700342{
Al Virob37ad282006-10-19 23:28:59 -0700343 __be32 status;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700344
345 u32 *p = (u32 *)commit->co_verf.data;
346 *p++ = nfssvc_boot.tv_sec;
347 *p++ = nfssvc_boot.tv_usec;
348
J.Bruce Fieldsca364312006-12-13 00:35:27 -0800349 status = nfsd_commit(rqstp, &cstate->current_fh, commit->co_offset,
350 commit->co_count);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700351 if (status == nfserr_symlink)
352 status = nfserr_inval;
353 return status;
354}
355
Al Virob37ad282006-10-19 23:28:59 -0700356static __be32
J.Bruce Fieldsca364312006-12-13 00:35:27 -0800357nfsd4_create(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
358 struct nfsd4_create *create)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700359{
360 struct svc_fh resfh;
Al Virob37ad282006-10-19 23:28:59 -0700361 __be32 status;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700362 dev_t rdev;
363
364 fh_init(&resfh, NFS4_FHSIZE);
365
J.Bruce Fieldsca364312006-12-13 00:35:27 -0800366 status = fh_verify(rqstp, &cstate->current_fh, S_IFDIR, MAY_CREATE);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700367 if (status == nfserr_symlink)
368 status = nfserr_notdir;
369 if (status)
370 return status;
371
372 switch (create->cr_type) {
373 case NF4LNK:
374 /* ugh! we have to null-terminate the linktext, or
375 * vfs_symlink() will choke. it is always safe to
376 * null-terminate by brute force, since at worst we
377 * will overwrite the first byte of the create namelen
378 * in the XDR buffer, which has already been extracted
379 * during XDR decode.
380 */
381 create->cr_linkname[create->cr_linklen] = 0;
382
J.Bruce Fieldsca364312006-12-13 00:35:27 -0800383 status = nfsd_symlink(rqstp, &cstate->current_fh,
384 create->cr_name, create->cr_namelen,
385 create->cr_linkname, create->cr_linklen,
386 &resfh, &create->cr_iattr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700387 break;
388
389 case NF4BLK:
390 rdev = MKDEV(create->cr_specdata1, create->cr_specdata2);
391 if (MAJOR(rdev) != create->cr_specdata1 ||
392 MINOR(rdev) != create->cr_specdata2)
393 return nfserr_inval;
J.Bruce Fieldsca364312006-12-13 00:35:27 -0800394 status = nfsd_create(rqstp, &cstate->current_fh,
395 create->cr_name, create->cr_namelen,
396 &create->cr_iattr, S_IFBLK, rdev, &resfh);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700397 break;
398
399 case NF4CHR:
400 rdev = MKDEV(create->cr_specdata1, create->cr_specdata2);
401 if (MAJOR(rdev) != create->cr_specdata1 ||
402 MINOR(rdev) != create->cr_specdata2)
403 return nfserr_inval;
J.Bruce Fieldsca364312006-12-13 00:35:27 -0800404 status = nfsd_create(rqstp, &cstate->current_fh,
405 create->cr_name, create->cr_namelen,
406 &create->cr_iattr,S_IFCHR, rdev, &resfh);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700407 break;
408
409 case NF4SOCK:
J.Bruce Fieldsca364312006-12-13 00:35:27 -0800410 status = nfsd_create(rqstp, &cstate->current_fh,
411 create->cr_name, create->cr_namelen,
412 &create->cr_iattr, S_IFSOCK, 0, &resfh);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700413 break;
414
415 case NF4FIFO:
J.Bruce Fieldsca364312006-12-13 00:35:27 -0800416 status = nfsd_create(rqstp, &cstate->current_fh,
417 create->cr_name, create->cr_namelen,
418 &create->cr_iattr, S_IFIFO, 0, &resfh);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700419 break;
420
421 case NF4DIR:
422 create->cr_iattr.ia_valid &= ~ATTR_SIZE;
J.Bruce Fieldsca364312006-12-13 00:35:27 -0800423 status = nfsd_create(rqstp, &cstate->current_fh,
424 create->cr_name, create->cr_namelen,
425 &create->cr_iattr, S_IFDIR, 0, &resfh);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700426 break;
427
428 default:
429 status = nfserr_badtype;
430 }
431
432 if (!status) {
J.Bruce Fieldsca364312006-12-13 00:35:27 -0800433 fh_unlock(&cstate->current_fh);
434 set_change_info(&create->cr_cinfo, &cstate->current_fh);
435 fh_dup2(&cstate->current_fh, &resfh);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700436 }
437
438 fh_put(&resfh);
439 return status;
440}
441
J.Bruce Fields71911552006-12-13 00:35:29 -0800442static __be32
J.Bruce Fieldsca364312006-12-13 00:35:27 -0800443nfsd4_getattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
444 struct nfsd4_getattr *getattr)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700445{
Al Virob37ad282006-10-19 23:28:59 -0700446 __be32 status;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700447
J.Bruce Fieldsca364312006-12-13 00:35:27 -0800448 status = fh_verify(rqstp, &cstate->current_fh, 0, MAY_NOP);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700449 if (status)
450 return status;
451
452 if (getattr->ga_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1)
453 return nfserr_inval;
454
455 getattr->ga_bmval[0] &= NFSD_SUPPORTED_ATTRS_WORD0;
456 getattr->ga_bmval[1] &= NFSD_SUPPORTED_ATTRS_WORD1;
457
J.Bruce Fieldsca364312006-12-13 00:35:27 -0800458 getattr->ga_fhp = &cstate->current_fh;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700459 return nfs_ok;
460}
461
J.Bruce Fields71911552006-12-13 00:35:29 -0800462static __be32
J.Bruce Fieldsca364312006-12-13 00:35:27 -0800463nfsd4_link(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
464 struct nfsd4_link *link)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700465{
Al Virob37ad282006-10-19 23:28:59 -0700466 __be32 status = nfserr_nofilehandle;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700467
J.Bruce Fieldsca364312006-12-13 00:35:27 -0800468 if (!cstate->save_fh.fh_dentry)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700469 return status;
J.Bruce Fieldsca364312006-12-13 00:35:27 -0800470 status = nfsd_link(rqstp, &cstate->current_fh,
471 link->li_name, link->li_namelen, &cstate->save_fh);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700472 if (!status)
J.Bruce Fieldsca364312006-12-13 00:35:27 -0800473 set_change_info(&link->li_cinfo, &cstate->current_fh);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700474 return status;
475}
476
Al Virob37ad282006-10-19 23:28:59 -0700477static __be32
J.Bruce Fieldsb5914802006-12-13 00:35:38 -0800478nfsd4_lookupp(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
479 void *arg)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700480{
481 struct svc_fh tmp_fh;
Al Virob37ad282006-10-19 23:28:59 -0700482 __be32 ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700483
484 fh_init(&tmp_fh, NFS4_FHSIZE);
J. Bruce Fieldsdf547ef2007-07-17 04:04:43 -0700485 ret = exp_pseudoroot(rqstp, &tmp_fh);
486 if (ret)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700487 return ret;
J.Bruce Fieldsca364312006-12-13 00:35:27 -0800488 if (tmp_fh.fh_dentry == cstate->current_fh.fh_dentry) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700489 fh_put(&tmp_fh);
490 return nfserr_noent;
491 }
492 fh_put(&tmp_fh);
J.Bruce Fieldsca364312006-12-13 00:35:27 -0800493 return nfsd_lookup(rqstp, &cstate->current_fh,
494 "..", 2, &cstate->current_fh);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700495}
496
J.Bruce Fields71911552006-12-13 00:35:29 -0800497static __be32
J.Bruce Fieldsca364312006-12-13 00:35:27 -0800498nfsd4_lookup(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
499 struct nfsd4_lookup *lookup)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700500{
J.Bruce Fieldsca364312006-12-13 00:35:27 -0800501 return nfsd_lookup(rqstp, &cstate->current_fh,
502 lookup->lo_name, lookup->lo_len,
503 &cstate->current_fh);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700504}
505
J.Bruce Fields71911552006-12-13 00:35:29 -0800506static __be32
J.Bruce Fieldsca364312006-12-13 00:35:27 -0800507nfsd4_read(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
508 struct nfsd4_read *read)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700509{
Al Virob37ad282006-10-19 23:28:59 -0700510 __be32 status;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700511
512 /* no need to check permission - this will be done in nfsd_read() */
513
NeilBrown7e06b7f2005-06-23 22:03:13 -0700514 read->rd_filp = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700515 if (read->rd_offset >= OFFSET_MAX)
516 return nfserr_inval;
517
518 nfs4_lock_state();
519 /* check stateid */
J.Bruce Fieldsca364312006-12-13 00:35:27 -0800520 if ((status = nfs4_preprocess_stateid_op(&cstate->current_fh,
521 &read->rd_stateid,
NeilBrown7e06b7f2005-06-23 22:03:13 -0700522 CHECK_FH | RD_STATE, &read->rd_filp))) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700523 dprintk("NFSD: nfsd4_read: couldn't process stateid!\n");
524 goto out;
525 }
NeilBrown7e06b7f2005-06-23 22:03:13 -0700526 if (read->rd_filp)
527 get_file(read->rd_filp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700528 status = nfs_ok;
529out:
530 nfs4_unlock_state();
531 read->rd_rqstp = rqstp;
J.Bruce Fieldsca364312006-12-13 00:35:27 -0800532 read->rd_fhp = &cstate->current_fh;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700533 return status;
534}
535
J.Bruce Fields71911552006-12-13 00:35:29 -0800536static __be32
J.Bruce Fieldsca364312006-12-13 00:35:27 -0800537nfsd4_readdir(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
538 struct nfsd4_readdir *readdir)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700539{
540 u64 cookie = readdir->rd_cookie;
541 static const nfs4_verifier zeroverf;
542
543 /* no need to check permission - this will be done in nfsd_readdir() */
544
545 if (readdir->rd_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1)
546 return nfserr_inval;
547
548 readdir->rd_bmval[0] &= NFSD_SUPPORTED_ATTRS_WORD0;
549 readdir->rd_bmval[1] &= NFSD_SUPPORTED_ATTRS_WORD1;
550
551 if ((cookie > ~(u32)0) || (cookie == 1) || (cookie == 2) ||
552 (cookie == 0 && memcmp(readdir->rd_verf.data, zeroverf.data, NFS4_VERIFIER_SIZE)))
553 return nfserr_bad_cookie;
554
555 readdir->rd_rqstp = rqstp;
J.Bruce Fieldsca364312006-12-13 00:35:27 -0800556 readdir->rd_fhp = &cstate->current_fh;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700557 return nfs_ok;
558}
559
J.Bruce Fields71911552006-12-13 00:35:29 -0800560static __be32
J.Bruce Fieldsca364312006-12-13 00:35:27 -0800561nfsd4_readlink(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
562 struct nfsd4_readlink *readlink)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700563{
564 readlink->rl_rqstp = rqstp;
J.Bruce Fieldsca364312006-12-13 00:35:27 -0800565 readlink->rl_fhp = &cstate->current_fh;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700566 return nfs_ok;
567}
568
J.Bruce Fields71911552006-12-13 00:35:29 -0800569static __be32
J.Bruce Fieldsca364312006-12-13 00:35:27 -0800570nfsd4_remove(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
571 struct nfsd4_remove *remove)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700572{
Al Virob37ad282006-10-19 23:28:59 -0700573 __be32 status;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700574
NeilBrownc815afc2005-06-23 22:03:00 -0700575 if (nfs4_in_grace())
576 return nfserr_grace;
J.Bruce Fieldsca364312006-12-13 00:35:27 -0800577 status = nfsd_unlink(rqstp, &cstate->current_fh, 0,
578 remove->rm_name, remove->rm_namelen);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700579 if (status == nfserr_symlink)
580 return nfserr_notdir;
581 if (!status) {
J.Bruce Fieldsca364312006-12-13 00:35:27 -0800582 fh_unlock(&cstate->current_fh);
583 set_change_info(&remove->rm_cinfo, &cstate->current_fh);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700584 }
585 return status;
586}
587
J.Bruce Fields71911552006-12-13 00:35:29 -0800588static __be32
J.Bruce Fieldsca364312006-12-13 00:35:27 -0800589nfsd4_rename(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
590 struct nfsd4_rename *rename)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700591{
Al Virob37ad282006-10-19 23:28:59 -0700592 __be32 status = nfserr_nofilehandle;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700593
J.Bruce Fieldsca364312006-12-13 00:35:27 -0800594 if (!cstate->save_fh.fh_dentry)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700595 return status;
J.Bruce Fieldsca364312006-12-13 00:35:27 -0800596 if (nfs4_in_grace() && !(cstate->save_fh.fh_export->ex_flags
NeilBrownc815afc2005-06-23 22:03:00 -0700597 & NFSEXP_NOSUBTREECHECK))
598 return nfserr_grace;
J.Bruce Fieldsca364312006-12-13 00:35:27 -0800599 status = nfsd_rename(rqstp, &cstate->save_fh, rename->rn_sname,
600 rename->rn_snamelen, &cstate->current_fh,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700601 rename->rn_tname, rename->rn_tnamelen);
602
603 /* the underlying filesystem returns different error's than required
604 * by NFSv4. both save_fh and current_fh have been verified.. */
605 if (status == nfserr_isdir)
606 status = nfserr_exist;
607 else if ((status == nfserr_notdir) &&
J.Bruce Fieldsca364312006-12-13 00:35:27 -0800608 (S_ISDIR(cstate->save_fh.fh_dentry->d_inode->i_mode) &&
609 S_ISDIR(cstate->current_fh.fh_dentry->d_inode->i_mode)))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700610 status = nfserr_exist;
611 else if (status == nfserr_symlink)
612 status = nfserr_notdir;
613
614 if (!status) {
J.Bruce Fieldsca364312006-12-13 00:35:27 -0800615 set_change_info(&rename->rn_sinfo, &cstate->current_fh);
616 set_change_info(&rename->rn_tinfo, &cstate->save_fh);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700617 }
618 return status;
619}
620
J.Bruce Fields71911552006-12-13 00:35:29 -0800621static __be32
Andy Adamsondcb488a2007-07-17 04:04:51 -0700622nfsd4_secinfo(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
623 struct nfsd4_secinfo *secinfo)
624{
625 struct svc_fh resfh;
626 struct svc_export *exp;
627 struct dentry *dentry;
628 __be32 err;
629
630 fh_init(&resfh, NFS4_FHSIZE);
631 err = nfsd_lookup_dentry(rqstp, &cstate->current_fh,
632 secinfo->si_name, secinfo->si_namelen,
633 &exp, &dentry);
634 if (err)
635 return err;
636 if (dentry->d_inode == NULL) {
637 exp_put(exp);
638 err = nfserr_noent;
639 } else
640 secinfo->si_exp = exp;
641 dput(dentry);
642 return err;
643}
644
645static __be32
J.Bruce Fieldsca364312006-12-13 00:35:27 -0800646nfsd4_setattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
647 struct nfsd4_setattr *setattr)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700648{
Al Virob37ad282006-10-19 23:28:59 -0700649 __be32 status = nfs_ok;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700650
Linus Torvalds1da177e2005-04-16 15:20:36 -0700651 if (setattr->sa_iattr.ia_valid & ATTR_SIZE) {
652 nfs4_lock_state();
J.Bruce Fieldsca364312006-12-13 00:35:27 -0800653 status = nfs4_preprocess_stateid_op(&cstate->current_fh,
J. Bruce Fields375c5542006-01-18 17:43:33 -0800654 &setattr->sa_stateid, CHECK_FH | WR_STATE, NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700655 nfs4_unlock_state();
J. Bruce Fields375c5542006-01-18 17:43:33 -0800656 if (status) {
Greg Banks3e3b4802006-10-02 02:17:41 -0700657 dprintk("NFSD: nfsd4_setattr: couldn't process stateid!\n");
J. Bruce Fields375c5542006-01-18 17:43:33 -0800658 return status;
659 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700660 }
661 status = nfs_ok;
662 if (setattr->sa_acl != NULL)
J.Bruce Fieldsca364312006-12-13 00:35:27 -0800663 status = nfsd4_set_nfs4_acl(rqstp, &cstate->current_fh,
664 setattr->sa_acl);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700665 if (status)
J. Bruce Fields375c5542006-01-18 17:43:33 -0800666 return status;
J.Bruce Fieldsca364312006-12-13 00:35:27 -0800667 status = nfsd_setattr(rqstp, &cstate->current_fh, &setattr->sa_iattr,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700668 0, (time_t)0);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700669 return status;
670}
671
J.Bruce Fields71911552006-12-13 00:35:29 -0800672static __be32
J.Bruce Fieldsca364312006-12-13 00:35:27 -0800673nfsd4_write(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
674 struct nfsd4_write *write)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700675{
676 stateid_t *stateid = &write->wr_stateid;
677 struct file *filp = NULL;
678 u32 *p;
Al Virob37ad282006-10-19 23:28:59 -0700679 __be32 status = nfs_ok;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700680
681 /* no need to check permission - this will be done in nfsd_write() */
682
683 if (write->wr_offset >= OFFSET_MAX)
684 return nfserr_inval;
685
686 nfs4_lock_state();
J.Bruce Fieldsca364312006-12-13 00:35:27 -0800687 status = nfs4_preprocess_stateid_op(&cstate->current_fh, stateid,
J. Bruce Fields375c5542006-01-18 17:43:33 -0800688 CHECK_FH | WR_STATE, &filp);
NeilBrown7e06b7f2005-06-23 22:03:13 -0700689 if (filp)
690 get_file(filp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700691 nfs4_unlock_state();
692
J. Bruce Fields375c5542006-01-18 17:43:33 -0800693 if (status) {
694 dprintk("NFSD: nfsd4_write: couldn't process stateid!\n");
695 return status;
696 }
697
Linus Torvalds1da177e2005-04-16 15:20:36 -0700698 write->wr_bytes_written = write->wr_buflen;
699 write->wr_how_written = write->wr_stable_how;
700 p = (u32 *)write->wr_verifier.data;
701 *p++ = nfssvc_boot.tv_sec;
702 *p++ = nfssvc_boot.tv_usec;
703
J.Bruce Fieldsca364312006-12-13 00:35:27 -0800704 status = nfsd_write(rqstp, &cstate->current_fh, filp,
705 write->wr_offset, rqstp->rq_vec, write->wr_vlen,
706 write->wr_buflen, &write->wr_how_written);
NeilBrown7e06b7f2005-06-23 22:03:13 -0700707 if (filp)
708 fput(filp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700709
710 if (status == nfserr_symlink)
711 status = nfserr_inval;
712 return status;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700713}
714
715/* This routine never returns NFS_OK! If there are no other errors, it
716 * will return NFSERR_SAME or NFSERR_NOT_SAME depending on whether the
717 * attributes matched. VERIFY is implemented by mapping NFSERR_SAME
718 * to NFS_OK after the call; NVERIFY by mapping NFSERR_NOT_SAME to NFS_OK.
719 */
Al Virob37ad282006-10-19 23:28:59 -0700720static __be32
J.Bruce Fieldsc954e2a2006-12-13 00:35:31 -0800721_nfsd4_verify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
J.Bruce Fieldsca364312006-12-13 00:35:27 -0800722 struct nfsd4_verify *verify)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700723{
Al Viro2ebbc012006-10-19 23:28:58 -0700724 __be32 *buf, *p;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700725 int count;
Al Virob37ad282006-10-19 23:28:59 -0700726 __be32 status;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700727
J.Bruce Fieldsca364312006-12-13 00:35:27 -0800728 status = fh_verify(rqstp, &cstate->current_fh, 0, MAY_NOP);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700729 if (status)
730 return status;
731
732 if ((verify->ve_bmval[0] & ~NFSD_SUPPORTED_ATTRS_WORD0)
733 || (verify->ve_bmval[1] & ~NFSD_SUPPORTED_ATTRS_WORD1))
734 return nfserr_attrnotsupp;
735 if ((verify->ve_bmval[0] & FATTR4_WORD0_RDATTR_ERROR)
736 || (verify->ve_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1))
737 return nfserr_inval;
738 if (verify->ve_attrlen & 3)
739 return nfserr_inval;
740
741 /* count in words:
742 * bitmap_len(1) + bitmap(2) + attr_len(1) = 4
743 */
744 count = 4 + (verify->ve_attrlen >> 2);
745 buf = kmalloc(count << 2, GFP_KERNEL);
746 if (!buf)
747 return nfserr_resource;
748
J.Bruce Fieldsca364312006-12-13 00:35:27 -0800749 status = nfsd4_encode_fattr(&cstate->current_fh,
750 cstate->current_fh.fh_export,
751 cstate->current_fh.fh_dentry, buf,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700752 &count, verify->ve_bmval,
753 rqstp);
754
755 /* this means that nfsd4_encode_fattr() ran out of space */
756 if (status == nfserr_resource && count == 0)
757 status = nfserr_not_same;
758 if (status)
759 goto out_kfree;
760
761 p = buf + 3;
762 status = nfserr_not_same;
763 if (ntohl(*p++) != verify->ve_attrlen)
764 goto out_kfree;
765 if (!memcmp(p, verify->ve_attrval, verify->ve_attrlen))
766 status = nfserr_same;
767
768out_kfree:
769 kfree(buf);
770 return status;
771}
772
J.Bruce Fieldsc954e2a2006-12-13 00:35:31 -0800773static __be32
774nfsd4_nverify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
775 struct nfsd4_verify *verify)
776{
777 __be32 status;
778
779 status = _nfsd4_verify(rqstp, cstate, verify);
780 return status == nfserr_not_same ? nfs_ok : status;
781}
782
783static __be32
784nfsd4_verify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
785 struct nfsd4_verify *verify)
786{
787 __be32 status;
788
789 status = _nfsd4_verify(rqstp, cstate, verify);
790 return status == nfserr_same ? nfs_ok : status;
791}
792
Linus Torvalds1da177e2005-04-16 15:20:36 -0700793/*
794 * NULL call.
795 */
Al Viro7111c662006-10-19 23:28:45 -0700796static __be32
Linus Torvalds1da177e2005-04-16 15:20:36 -0700797nfsd4_proc_null(struct svc_rqst *rqstp, void *argp, void *resp)
798{
799 return nfs_ok;
800}
801
Shankar Anande2b20952006-07-10 04:45:44 -0700802static inline void nfsd4_increment_op_stats(u32 opnum)
803{
804 if (opnum >= FIRST_NFS4_OP && opnum <= LAST_NFS4_OP)
805 nfsdstats.nfs4_opcount[opnum]++;
806}
807
J.Bruce Fieldsca364312006-12-13 00:35:27 -0800808static void cstate_free(struct nfsd4_compound_state *cstate)
809{
810 if (cstate == NULL)
811 return;
812 fh_put(&cstate->current_fh);
813 fh_put(&cstate->save_fh);
J.Bruce Fieldsa4f1706a92006-12-13 00:35:28 -0800814 BUG_ON(cstate->replay_owner);
J.Bruce Fieldsca364312006-12-13 00:35:27 -0800815 kfree(cstate);
816}
817
818static struct nfsd4_compound_state *cstate_alloc(void)
819{
820 struct nfsd4_compound_state *cstate;
821
822 cstate = kmalloc(sizeof(struct nfsd4_compound_state), GFP_KERNEL);
823 if (cstate == NULL)
824 return NULL;
825 fh_init(&cstate->current_fh, NFS4_FHSIZE);
826 fh_init(&cstate->save_fh, NFS4_FHSIZE);
J.Bruce Fieldsa4f1706a92006-12-13 00:35:28 -0800827 cstate->replay_owner = NULL;
J.Bruce Fieldsca364312006-12-13 00:35:27 -0800828 return cstate;
829}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700830
J.Bruce Fieldsb5914802006-12-13 00:35:38 -0800831typedef __be32(*nfsd4op_func)(struct svc_rqst *, struct nfsd4_compound_state *,
832 void *);
833
834struct nfsd4_operation {
835 nfsd4op_func op_func;
836 u32 op_flags;
J.Bruce Fields27d630e2006-12-13 00:35:43 -0800837/* Most ops require a valid current filehandle; a few don't: */
838#define ALLOWED_WITHOUT_FH 1
J.Bruce Fieldseeac2942006-12-13 00:35:39 -0800839/* GETATTR and ops not listed as returning NFS4ERR_MOVED: */
J.Bruce Fields27d630e2006-12-13 00:35:43 -0800840#define ALLOWED_ON_ABSENT_FS 2
J.Bruce Fieldsb5914802006-12-13 00:35:38 -0800841};
842
843static struct nfsd4_operation nfsd4_ops[];
844
Linus Torvalds1da177e2005-04-16 15:20:36 -0700845/*
846 * COMPOUND call.
847 */
Al Viro7111c662006-10-19 23:28:45 -0700848static __be32
Linus Torvalds1da177e2005-04-16 15:20:36 -0700849nfsd4_proc_compound(struct svc_rqst *rqstp,
850 struct nfsd4_compoundargs *args,
851 struct nfsd4_compoundres *resp)
852{
853 struct nfsd4_op *op;
J.Bruce Fieldsb5914802006-12-13 00:35:38 -0800854 struct nfsd4_operation *opdesc;
J.Bruce Fieldsca364312006-12-13 00:35:27 -0800855 struct nfsd4_compound_state *cstate = NULL;
J.Bruce Fieldse5710192006-12-13 00:35:20 -0800856 int slack_bytes;
Al Virob37ad282006-10-19 23:28:59 -0700857 __be32 status;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700858
859 status = nfserr_resource;
J.Bruce Fieldsca364312006-12-13 00:35:27 -0800860 cstate = cstate_alloc();
861 if (cstate == NULL)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700862 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700863
864 resp->xbuf = &rqstp->rq_res;
865 resp->p = rqstp->rq_res.head[0].iov_base + rqstp->rq_res.head[0].iov_len;
866 resp->tagp = resp->p;
867 /* reserve space for: taglen, tag, and opcnt */
868 resp->p += 2 + XDR_QUADLEN(args->taglen);
869 resp->end = rqstp->rq_res.head[0].iov_base + PAGE_SIZE;
870 resp->taglen = args->taglen;
871 resp->tag = args->tag;
872 resp->opcnt = 0;
873 resp->rqstp = rqstp;
874
875 /*
876 * According to RFC3010, this takes precedence over all other errors.
877 */
878 status = nfserr_minor_vers_mismatch;
879 if (args->minorversion > NFSD_SUPPORTED_MINOR_VERSION)
880 goto out;
881
882 status = nfs_ok;
883 while (!status && resp->opcnt < args->opcnt) {
884 op = &args->ops[resp->opcnt++];
885
J. Bruce Fieldsfd445272006-01-18 17:43:23 -0800886 dprintk("nfsv4 compound op #%d: %d\n", resp->opcnt, op->opnum);
887
Linus Torvalds1da177e2005-04-16 15:20:36 -0700888 /*
889 * The XDR decode routines may have pre-set op->status;
890 * for example, if there is a miscellaneous XDR error
891 * it will be set to nfserr_bad_xdr.
892 */
893 if (op->status)
894 goto encode_op;
895
896 /* We must be able to encode a successful response to
897 * this operation, with enough room left over to encode a
898 * failed response to the next operation. If we don't
899 * have enough room, fail with ERR_RESOURCE.
900 */
J.Bruce Fieldse5710192006-12-13 00:35:20 -0800901 slack_bytes = (char *)resp->end - (char *)resp->p;
902 if (slack_bytes < COMPOUND_SLACK_SPACE
903 + COMPOUND_ERR_SLACK_SPACE) {
904 BUG_ON(slack_bytes < COMPOUND_ERR_SLACK_SPACE);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700905 op->status = nfserr_resource;
906 goto encode_op;
907 }
908
J.Bruce Fieldsb5914802006-12-13 00:35:38 -0800909 opdesc = &nfsd4_ops[op->opnum];
910
J.Bruce Fieldsca364312006-12-13 00:35:27 -0800911 if (!cstate->current_fh.fh_dentry) {
J.Bruce Fields27d630e2006-12-13 00:35:43 -0800912 if (!(opdesc->op_flags & ALLOWED_WITHOUT_FH)) {
J.Bruce Fields42ca0992006-10-04 02:16:20 -0700913 op->status = nfserr_nofilehandle;
914 goto encode_op;
915 }
J.Bruce Fieldseeac2942006-12-13 00:35:39 -0800916 } else if (cstate->current_fh.fh_export->ex_fslocs.migrated &&
917 !(opdesc->op_flags & ALLOWED_ON_ABSENT_FS)) {
J.Bruce Fields42ca0992006-10-04 02:16:20 -0700918 op->status = nfserr_moved;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700919 goto encode_op;
920 }
J.Bruce Fieldsb5914802006-12-13 00:35:38 -0800921
922 if (opdesc->op_func)
923 op->status = opdesc->op_func(rqstp, cstate, &op->u);
924 else
Linus Torvalds1da177e2005-04-16 15:20:36 -0700925 BUG_ON(op->status == nfs_ok);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700926
927encode_op:
Al Viroa90b0612006-10-19 23:29:03 -0700928 if (op->status == nfserr_replay_me) {
J.Bruce Fieldsa4f1706a92006-12-13 00:35:28 -0800929 op->replay = &cstate->replay_owner->so_replay;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700930 nfsd4_encode_replay(resp, op);
931 status = op->status = op->replay->rp_status;
932 } else {
933 nfsd4_encode_operation(resp, op);
934 status = op->status;
935 }
J.Bruce Fieldsa4f1706a92006-12-13 00:35:28 -0800936 if (cstate->replay_owner) {
937 nfs4_put_stateowner(cstate->replay_owner);
938 cstate->replay_owner = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700939 }
NeilBrown7e06b7f2005-06-23 22:03:13 -0700940 /* XXX Ugh, we need to get rid of this kind of special case: */
941 if (op->opnum == OP_READ && op->u.read.rd_filp)
942 fput(op->u.read.rd_filp);
Shankar Anande2b20952006-07-10 04:45:44 -0700943
944 nfsd4_increment_op_stats(op->opnum);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700945 }
946
947out:
948 nfsd4_release_compoundargs(args);
J.Bruce Fieldsca364312006-12-13 00:35:27 -0800949 cstate_free(cstate);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700950 return status;
951}
952
J.Bruce Fieldsb5914802006-12-13 00:35:38 -0800953static struct nfsd4_operation nfsd4_ops[OP_RELEASE_LOCKOWNER+1] = {
954 [OP_ACCESS] = {
955 .op_func = (nfsd4op_func)nfsd4_access,
956 },
957 [OP_CLOSE] = {
958 .op_func = (nfsd4op_func)nfsd4_close,
959 },
960 [OP_COMMIT] = {
961 .op_func = (nfsd4op_func)nfsd4_commit,
962 },
963 [OP_CREATE] = {
964 .op_func = (nfsd4op_func)nfsd4_create,
965 },
966 [OP_DELEGRETURN] = {
967 .op_func = (nfsd4op_func)nfsd4_delegreturn,
968 },
969 [OP_GETATTR] = {
970 .op_func = (nfsd4op_func)nfsd4_getattr,
J.Bruce Fieldseeac2942006-12-13 00:35:39 -0800971 .op_flags = ALLOWED_ON_ABSENT_FS,
J.Bruce Fieldsb5914802006-12-13 00:35:38 -0800972 },
973 [OP_GETFH] = {
974 .op_func = (nfsd4op_func)nfsd4_getfh,
975 },
976 [OP_LINK] = {
977 .op_func = (nfsd4op_func)nfsd4_link,
978 },
979 [OP_LOCK] = {
980 .op_func = (nfsd4op_func)nfsd4_lock,
981 },
982 [OP_LOCKT] = {
983 .op_func = (nfsd4op_func)nfsd4_lockt,
984 },
985 [OP_LOCKU] = {
986 .op_func = (nfsd4op_func)nfsd4_locku,
987 },
988 [OP_LOOKUP] = {
989 .op_func = (nfsd4op_func)nfsd4_lookup,
990 },
991 [OP_LOOKUPP] = {
992 .op_func = (nfsd4op_func)nfsd4_lookupp,
993 },
994 [OP_NVERIFY] = {
995 .op_func = (nfsd4op_func)nfsd4_nverify,
996 },
997 [OP_OPEN] = {
998 .op_func = (nfsd4op_func)nfsd4_open,
999 },
1000 [OP_OPEN_CONFIRM] = {
1001 .op_func = (nfsd4op_func)nfsd4_open_confirm,
1002 },
1003 [OP_OPEN_DOWNGRADE] = {
1004 .op_func = (nfsd4op_func)nfsd4_open_downgrade,
1005 },
1006 [OP_PUTFH] = {
1007 .op_func = (nfsd4op_func)nfsd4_putfh,
J.Bruce Fields27d630e2006-12-13 00:35:43 -08001008 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS,
J.Bruce Fieldsb5914802006-12-13 00:35:38 -08001009 },
J.Bruce Fieldseeac2942006-12-13 00:35:39 -08001010 [OP_PUTPUBFH] = {
1011 /* unsupported; just for future reference: */
J.Bruce Fields27d630e2006-12-13 00:35:43 -08001012 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS,
J.Bruce Fieldseeac2942006-12-13 00:35:39 -08001013 },
J.Bruce Fieldsb5914802006-12-13 00:35:38 -08001014 [OP_PUTROOTFH] = {
1015 .op_func = (nfsd4op_func)nfsd4_putrootfh,
J.Bruce Fields27d630e2006-12-13 00:35:43 -08001016 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS,
J.Bruce Fieldsb5914802006-12-13 00:35:38 -08001017 },
1018 [OP_READ] = {
1019 .op_func = (nfsd4op_func)nfsd4_read,
1020 },
1021 [OP_READDIR] = {
1022 .op_func = (nfsd4op_func)nfsd4_readdir,
1023 },
1024 [OP_READLINK] = {
1025 .op_func = (nfsd4op_func)nfsd4_readlink,
1026 },
1027 [OP_REMOVE] = {
1028 .op_func = (nfsd4op_func)nfsd4_remove,
1029 },
1030 [OP_RENAME] = {
1031 .op_func = (nfsd4op_func)nfsd4_rename,
1032 },
1033 [OP_RENEW] = {
1034 .op_func = (nfsd4op_func)nfsd4_renew,
J.Bruce Fields27d630e2006-12-13 00:35:43 -08001035 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS,
J.Bruce Fieldsb5914802006-12-13 00:35:38 -08001036 },
1037 [OP_RESTOREFH] = {
1038 .op_func = (nfsd4op_func)nfsd4_restorefh,
J.Bruce Fields27d630e2006-12-13 00:35:43 -08001039 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS,
J.Bruce Fieldsb5914802006-12-13 00:35:38 -08001040 },
1041 [OP_SAVEFH] = {
1042 .op_func = (nfsd4op_func)nfsd4_savefh,
1043 },
Andy Adamsondcb488a2007-07-17 04:04:51 -07001044 [OP_SECINFO] = {
1045 .op_func = (nfsd4op_func)nfsd4_secinfo,
1046 },
J.Bruce Fieldsb5914802006-12-13 00:35:38 -08001047 [OP_SETATTR] = {
1048 .op_func = (nfsd4op_func)nfsd4_setattr,
1049 },
1050 [OP_SETCLIENTID] = {
1051 .op_func = (nfsd4op_func)nfsd4_setclientid,
J.Bruce Fields27d630e2006-12-13 00:35:43 -08001052 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS,
J.Bruce Fieldsb5914802006-12-13 00:35:38 -08001053 },
1054 [OP_SETCLIENTID_CONFIRM] = {
1055 .op_func = (nfsd4op_func)nfsd4_setclientid_confirm,
J.Bruce Fields27d630e2006-12-13 00:35:43 -08001056 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS,
J.Bruce Fieldsb5914802006-12-13 00:35:38 -08001057 },
1058 [OP_VERIFY] = {
1059 .op_func = (nfsd4op_func)nfsd4_verify,
1060 },
1061 [OP_WRITE] = {
1062 .op_func = (nfsd4op_func)nfsd4_write,
1063 },
1064 [OP_RELEASE_LOCKOWNER] = {
1065 .op_func = (nfsd4op_func)nfsd4_release_lockowner,
J.Bruce Fields27d630e2006-12-13 00:35:43 -08001066 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS,
J.Bruce Fieldsb5914802006-12-13 00:35:38 -08001067 },
1068};
1069
Linus Torvalds1da177e2005-04-16 15:20:36 -07001070#define nfs4svc_decode_voidargs NULL
1071#define nfs4svc_release_void NULL
1072#define nfsd4_voidres nfsd4_voidargs
1073#define nfs4svc_release_compound NULL
1074struct nfsd4_voidargs { int dummy; };
1075
1076#define PROC(name, argt, rest, relt, cache, respsize) \
1077 { (svc_procfunc) nfsd4_proc_##name, \
1078 (kxdrproc_t) nfs4svc_decode_##argt##args, \
1079 (kxdrproc_t) nfs4svc_encode_##rest##res, \
1080 (kxdrproc_t) nfs4svc_release_##relt, \
1081 sizeof(struct nfsd4_##argt##args), \
1082 sizeof(struct nfsd4_##rest##res), \
1083 0, \
1084 cache, \
1085 respsize, \
1086 }
1087
1088/*
1089 * TODO: At the present time, the NFSv4 server does not do XID caching
1090 * of requests. Implementing XID caching would not be a serious problem,
1091 * although it would require a mild change in interfaces since one
1092 * doesn't know whether an NFSv4 request is idempotent until after the
1093 * XDR decode. However, XID caching totally confuses pynfs (Peter
1094 * Astrand's regression testsuite for NFSv4 servers), which reuses
1095 * XID's liberally, so I've left it unimplemented until pynfs generates
1096 * better XID's.
1097 */
1098static struct svc_procedure nfsd_procedures4[2] = {
1099 PROC(null, void, void, void, RC_NOCACHE, 1),
NeilBrown7775f4c2006-04-10 22:55:20 -07001100 PROC(compound, compound, compound, compound, RC_NOCACHE, NFSD_BUFSIZE/4)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001101};
1102
1103struct svc_version nfsd_version4 = {
1104 .vs_vers = 4,
1105 .vs_nproc = 2,
1106 .vs_proc = nfsd_procedures4,
1107 .vs_dispatch = nfsd_dispatch,
1108 .vs_xdrsize = NFS4_SVC_XDRSIZE,
1109};
1110
1111/*
1112 * Local variables:
1113 * c-basic-offset: 8
1114 * End:
1115 */