blob: 6aa5590c3679135279d2731b2af79fd8804b44a2 [file] [log] [blame]
Andreas Gruenbachera257cdd2005-06-22 17:16:26 +00001/*
Andreas Gruenbachera257cdd2005-06-22 17:16:26 +00002 * Process version 2 NFSACL requests.
3 *
4 * Copyright (C) 2002-2003 Andreas Gruenbacher <agruen@suse.de>
5 */
6
Boaz Harrosh9a74af22009-12-03 20:30:56 +02007#include "nfsd.h"
8/* FIXME: nfsacl.h is a broken header */
Andreas Gruenbachera257cdd2005-06-22 17:16:26 +00009#include <linux/nfsacl.h>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090010#include <linux/gfp.h>
Boaz Harrosh9a74af22009-12-03 20:30:56 +020011#include "cache.h"
12#include "xdr3.h"
J. Bruce Fields0a3adad2009-11-04 18:12:35 -050013#include "vfs.h"
Andreas Gruenbachera257cdd2005-06-22 17:16:26 +000014
15#define NFSDDBG_FACILITY NFSDDBG_PROC
16#define RETURN_STATUS(st) { resp->status = (st); return (st); }
17
18/*
19 * NULL call.
20 */
Al Viro7111c662006-10-19 23:28:45 -070021static __be32
Andreas Gruenbachera257cdd2005-06-22 17:16:26 +000022nfsacld_proc_null(struct svc_rqst *rqstp, void *argp, void *resp)
23{
24 return nfs_ok;
25}
26
27/*
28 * Get the Access and/or Default ACL of a file.
29 */
Al Viro7111c662006-10-19 23:28:45 -070030static __be32 nfsacld_proc_getacl(struct svc_rqst * rqstp,
Andreas Gruenbachera257cdd2005-06-22 17:16:26 +000031 struct nfsd3_getaclargs *argp, struct nfsd3_getaclres *resp)
32{
33 svc_fh *fh;
34 struct posix_acl *acl;
Al Viroc4d987b2006-10-19 23:29:00 -070035 __be32 nfserr = 0;
Andreas Gruenbachera257cdd2005-06-22 17:16:26 +000036
37 dprintk("nfsd: GETACL(2acl) %s\n", SVCFH_fmt(&argp->fh));
38
39 fh = fh_copy(&resp->fh, &argp->fh);
Miklos Szeredi8837abc2008-06-16 13:20:29 +020040 nfserr = fh_verify(rqstp, &resp->fh, 0, NFSD_MAY_NOP);
41 if (nfserr)
J. Bruce Fieldsac8587d2007-11-12 16:05:02 -050042 RETURN_STATUS(nfserr);
Andreas Gruenbachera257cdd2005-06-22 17:16:26 +000043
44 if (argp->mask & ~(NFS_ACL|NFS_ACLCNT|NFS_DFACL|NFS_DFACLCNT))
45 RETURN_STATUS(nfserr_inval);
46 resp->mask = argp->mask;
47
48 if (resp->mask & (NFS_ACL|NFS_ACLCNT)) {
49 acl = nfsd_get_posix_acl(fh, ACL_TYPE_ACCESS);
50 if (IS_ERR(acl)) {
51 int err = PTR_ERR(acl);
52
53 if (err == -ENODATA || err == -EOPNOTSUPP)
54 acl = NULL;
55 else {
56 nfserr = nfserrno(err);
57 goto fail;
58 }
59 }
60 if (acl == NULL) {
61 /* Solaris returns the inode's minimum ACL. */
62
63 struct inode *inode = fh->fh_dentry->d_inode;
64 acl = posix_acl_from_mode(inode->i_mode, GFP_KERNEL);
65 }
66 resp->acl_access = acl;
67 }
68 if (resp->mask & (NFS_DFACL|NFS_DFACLCNT)) {
69 /* Check how Solaris handles requests for the Default ACL
70 of a non-directory! */
71
72 acl = nfsd_get_posix_acl(fh, ACL_TYPE_DEFAULT);
73 if (IS_ERR(acl)) {
74 int err = PTR_ERR(acl);
75
76 if (err == -ENODATA || err == -EOPNOTSUPP)
77 acl = NULL;
78 else {
79 nfserr = nfserrno(err);
80 goto fail;
81 }
82 }
83 resp->acl_default = acl;
84 }
85
86 /* resp->acl_{access,default} are released in nfssvc_release_getacl. */
87 RETURN_STATUS(0);
88
89fail:
90 posix_acl_release(resp->acl_access);
91 posix_acl_release(resp->acl_default);
92 RETURN_STATUS(nfserr);
93}
94
95/*
96 * Set the Access and/or Default ACL of a file.
97 */
Al Viro7111c662006-10-19 23:28:45 -070098static __be32 nfsacld_proc_setacl(struct svc_rqst * rqstp,
Andreas Gruenbachera257cdd2005-06-22 17:16:26 +000099 struct nfsd3_setaclargs *argp,
100 struct nfsd_attrstat *resp)
101{
102 svc_fh *fh;
Al Viroc4d987b2006-10-19 23:29:00 -0700103 __be32 nfserr = 0;
Andreas Gruenbachera257cdd2005-06-22 17:16:26 +0000104
105 dprintk("nfsd: SETACL(2acl) %s\n", SVCFH_fmt(&argp->fh));
106
107 fh = fh_copy(&resp->fh, &argp->fh);
Miklos Szeredi8837abc2008-06-16 13:20:29 +0200108 nfserr = fh_verify(rqstp, &resp->fh, 0, NFSD_MAY_SATTR);
Andreas Gruenbachera257cdd2005-06-22 17:16:26 +0000109
110 if (!nfserr) {
111 nfserr = nfserrno( nfsd_set_posix_acl(
112 fh, ACL_TYPE_ACCESS, argp->acl_access) );
113 }
114 if (!nfserr) {
115 nfserr = nfserrno( nfsd_set_posix_acl(
116 fh, ACL_TYPE_DEFAULT, argp->acl_default) );
117 }
118
119 /* argp->acl_{access,default} may have been allocated in
120 nfssvc_decode_setaclargs. */
121 posix_acl_release(argp->acl_access);
122 posix_acl_release(argp->acl_default);
123 return nfserr;
124}
125
126/*
127 * Check file attributes
128 */
Al Viro7111c662006-10-19 23:28:45 -0700129static __be32 nfsacld_proc_getattr(struct svc_rqst * rqstp,
Andreas Gruenbachera257cdd2005-06-22 17:16:26 +0000130 struct nfsd_fhandle *argp, struct nfsd_attrstat *resp)
131{
132 dprintk("nfsd: GETATTR %s\n", SVCFH_fmt(&argp->fh));
133
134 fh_copy(&resp->fh, &argp->fh);
Miklos Szeredi8837abc2008-06-16 13:20:29 +0200135 return fh_verify(rqstp, &resp->fh, 0, NFSD_MAY_NOP);
Andreas Gruenbachera257cdd2005-06-22 17:16:26 +0000136}
137
138/*
139 * Check file access
140 */
Al Viro7111c662006-10-19 23:28:45 -0700141static __be32 nfsacld_proc_access(struct svc_rqst *rqstp, struct nfsd3_accessargs *argp,
Andreas Gruenbachera257cdd2005-06-22 17:16:26 +0000142 struct nfsd3_accessres *resp)
143{
Al Viroc4d987b2006-10-19 23:29:00 -0700144 __be32 nfserr;
Andreas Gruenbachera257cdd2005-06-22 17:16:26 +0000145
146 dprintk("nfsd: ACCESS(2acl) %s 0x%x\n",
147 SVCFH_fmt(&argp->fh),
148 argp->access);
149
150 fh_copy(&resp->fh, &argp->fh);
151 resp->access = argp->access;
152 nfserr = nfsd_access(rqstp, &resp->fh, &resp->access, NULL);
153 return nfserr;
154}
155
156/*
157 * XDR decode functions
158 */
Al Viro131a21c2006-10-19 23:28:56 -0700159static int nfsaclsvc_decode_getaclargs(struct svc_rqst *rqstp, __be32 *p,
Andreas Gruenbachera257cdd2005-06-22 17:16:26 +0000160 struct nfsd3_getaclargs *argp)
161{
162 if (!(p = nfs2svc_decode_fh(p, &argp->fh)))
163 return 0;
164 argp->mask = ntohl(*p); p++;
165
166 return xdr_argsize_check(rqstp, p);
167}
168
169
Al Viro131a21c2006-10-19 23:28:56 -0700170static int nfsaclsvc_decode_setaclargs(struct svc_rqst *rqstp, __be32 *p,
Andreas Gruenbachera257cdd2005-06-22 17:16:26 +0000171 struct nfsd3_setaclargs *argp)
172{
173 struct kvec *head = rqstp->rq_arg.head;
174 unsigned int base;
175 int n;
176
177 if (!(p = nfs2svc_decode_fh(p, &argp->fh)))
178 return 0;
179 argp->mask = ntohl(*p++);
180 if (argp->mask & ~(NFS_ACL|NFS_ACLCNT|NFS_DFACL|NFS_DFACLCNT) ||
181 !xdr_argsize_check(rqstp, p))
182 return 0;
183
184 base = (char *)p - (char *)head->iov_base;
185 n = nfsacl_decode(&rqstp->rq_arg, base, NULL,
186 (argp->mask & NFS_ACL) ?
187 &argp->acl_access : NULL);
188 if (n > 0)
189 n = nfsacl_decode(&rqstp->rq_arg, base + n, NULL,
190 (argp->mask & NFS_DFACL) ?
191 &argp->acl_default : NULL);
192 return (n > 0);
193}
194
Al Viro131a21c2006-10-19 23:28:56 -0700195static int nfsaclsvc_decode_fhandleargs(struct svc_rqst *rqstp, __be32 *p,
Andreas Gruenbachera257cdd2005-06-22 17:16:26 +0000196 struct nfsd_fhandle *argp)
197{
198 if (!(p = nfs2svc_decode_fh(p, &argp->fh)))
199 return 0;
200 return xdr_argsize_check(rqstp, p);
201}
202
Al Viro131a21c2006-10-19 23:28:56 -0700203static int nfsaclsvc_decode_accessargs(struct svc_rqst *rqstp, __be32 *p,
Andreas Gruenbachera257cdd2005-06-22 17:16:26 +0000204 struct nfsd3_accessargs *argp)
205{
206 if (!(p = nfs2svc_decode_fh(p, &argp->fh)))
207 return 0;
208 argp->access = ntohl(*p++);
209
210 return xdr_argsize_check(rqstp, p);
211}
212
213/*
214 * XDR encode functions
215 */
216
Peter Staubach1b7e0402009-11-02 16:59:07 -0500217/*
218 * There must be an encoding function for void results so svc_process
219 * will work properly.
220 */
221int
222nfsaclsvc_encode_voidres(struct svc_rqst *rqstp, __be32 *p, void *dummy)
223{
224 return xdr_ressize_check(rqstp, p);
225}
226
Andreas Gruenbachera257cdd2005-06-22 17:16:26 +0000227/* GETACL */
Al Viro131a21c2006-10-19 23:28:56 -0700228static int nfsaclsvc_encode_getaclres(struct svc_rqst *rqstp, __be32 *p,
Andreas Gruenbachera257cdd2005-06-22 17:16:26 +0000229 struct nfsd3_getaclres *resp)
230{
231 struct dentry *dentry = resp->fh.fh_dentry;
Prasad Paefa89d2007-10-24 15:14:32 -0500232 struct inode *inode;
Andreas Gruenbachera257cdd2005-06-22 17:16:26 +0000233 struct kvec *head = rqstp->rq_res.head;
234 unsigned int base;
235 int n;
Jesper Juhlcb65a5b2006-12-08 02:39:39 -0800236 int w;
Andreas Gruenbachera257cdd2005-06-22 17:16:26 +0000237
Prasad Paefa89d2007-10-24 15:14:32 -0500238 /*
239 * Since this is version 2, the check for nfserr in
240 * nfsd_dispatch actually ensures the following cannot happen.
241 * However, it seems fragile to depend on that.
242 */
Andreas Gruenbachera257cdd2005-06-22 17:16:26 +0000243 if (dentry == NULL || dentry->d_inode == NULL)
244 return 0;
245 inode = dentry->d_inode;
246
247 p = nfs2svc_encode_fattr(rqstp, p, &resp->fh);
248 *p++ = htonl(resp->mask);
249 if (!xdr_ressize_check(rqstp, p))
250 return 0;
251 base = (char *)p - (char *)head->iov_base;
252
Jesper Juhlcb65a5b2006-12-08 02:39:39 -0800253 rqstp->rq_res.page_len = w = nfsacl_size(
254 (resp->mask & NFS_ACL) ? resp->acl_access : NULL,
255 (resp->mask & NFS_DFACL) ? resp->acl_default : NULL);
Andreas Gruenbachera257cdd2005-06-22 17:16:26 +0000256 while (w > 0) {
NeilBrown44524352006-10-04 02:15:46 -0700257 if (!rqstp->rq_respages[rqstp->rq_resused++])
Andreas Gruenbachera257cdd2005-06-22 17:16:26 +0000258 return 0;
259 w -= PAGE_SIZE;
260 }
261
262 n = nfsacl_encode(&rqstp->rq_res, base, inode,
263 resp->acl_access,
264 resp->mask & NFS_ACL, 0);
265 if (n > 0)
266 n = nfsacl_encode(&rqstp->rq_res, base + n, inode,
267 resp->acl_default,
268 resp->mask & NFS_DFACL,
269 NFS_ACL_DEFAULT);
270 if (n <= 0)
271 return 0;
272 return 1;
273}
274
Al Viro131a21c2006-10-19 23:28:56 -0700275static int nfsaclsvc_encode_attrstatres(struct svc_rqst *rqstp, __be32 *p,
Andreas Gruenbachera257cdd2005-06-22 17:16:26 +0000276 struct nfsd_attrstat *resp)
277{
278 p = nfs2svc_encode_fattr(rqstp, p, &resp->fh);
279 return xdr_ressize_check(rqstp, p);
280}
281
282/* ACCESS */
Al Viro131a21c2006-10-19 23:28:56 -0700283static int nfsaclsvc_encode_accessres(struct svc_rqst *rqstp, __be32 *p,
Andreas Gruenbachera257cdd2005-06-22 17:16:26 +0000284 struct nfsd3_accessres *resp)
285{
286 p = nfs2svc_encode_fattr(rqstp, p, &resp->fh);
287 *p++ = htonl(resp->access);
288 return xdr_ressize_check(rqstp, p);
289}
290
291/*
292 * XDR release functions
293 */
Al Viro131a21c2006-10-19 23:28:56 -0700294static int nfsaclsvc_release_getacl(struct svc_rqst *rqstp, __be32 *p,
Andreas Gruenbachera257cdd2005-06-22 17:16:26 +0000295 struct nfsd3_getaclres *resp)
296{
297 fh_put(&resp->fh);
298 posix_acl_release(resp->acl_access);
299 posix_acl_release(resp->acl_default);
300 return 1;
301}
302
Greg Banksc9ce2282007-02-20 10:12:34 +1100303static int nfsaclsvc_release_attrstat(struct svc_rqst *rqstp, __be32 *p,
304 struct nfsd_attrstat *resp)
Andreas Gruenbachera257cdd2005-06-22 17:16:26 +0000305{
306 fh_put(&resp->fh);
307 return 1;
308}
309
Greg Banksc9ce2282007-02-20 10:12:34 +1100310static int nfsaclsvc_release_access(struct svc_rqst *rqstp, __be32 *p,
311 struct nfsd3_accessres *resp)
312{
313 fh_put(&resp->fh);
314 return 1;
315}
316
Andreas Gruenbachera257cdd2005-06-22 17:16:26 +0000317#define nfsaclsvc_decode_voidargs NULL
Andreas Gruenbachera257cdd2005-06-22 17:16:26 +0000318#define nfsaclsvc_release_void NULL
319#define nfsd3_fhandleargs nfsd_fhandle
320#define nfsd3_attrstatres nfsd_attrstat
321#define nfsd3_voidres nfsd3_voidargs
322struct nfsd3_voidargs { int dummy; };
323
324#define PROC(name, argt, rest, relt, cache, respsize) \
325 { (svc_procfunc) nfsacld_proc_##name, \
326 (kxdrproc_t) nfsaclsvc_decode_##argt##args, \
327 (kxdrproc_t) nfsaclsvc_encode_##rest##res, \
328 (kxdrproc_t) nfsaclsvc_release_##relt, \
329 sizeof(struct nfsd3_##argt##args), \
330 sizeof(struct nfsd3_##rest##res), \
331 0, \
332 cache, \
333 respsize, \
334 }
335
336#define ST 1 /* status*/
337#define AT 21 /* attributes */
338#define pAT (1+AT) /* post attributes - conditional */
339#define ACL (1+NFS_ACL_MAX_ENTRIES*3) /* Access Control List */
340
341static struct svc_procedure nfsd_acl_procedures2[] = {
342 PROC(null, void, void, void, RC_NOCACHE, ST),
343 PROC(getacl, getacl, getacl, getacl, RC_NOCACHE, ST+1+2*(1+ACL)),
Greg Banksc9ce2282007-02-20 10:12:34 +1100344 PROC(setacl, setacl, attrstat, attrstat, RC_NOCACHE, ST+AT),
345 PROC(getattr, fhandle, attrstat, attrstat, RC_NOCACHE, ST+AT),
346 PROC(access, access, access, access, RC_NOCACHE, ST+AT+1),
Andreas Gruenbachera257cdd2005-06-22 17:16:26 +0000347};
348
349struct svc_version nfsd_acl_version2 = {
350 .vs_vers = 2,
351 .vs_nproc = 5,
352 .vs_proc = nfsd_acl_procedures2,
353 .vs_dispatch = nfsd_dispatch,
354 .vs_xdrsize = NFS3_SVC_XDRSIZE,
Peter Staubach1b7e0402009-11-02 16:59:07 -0500355 .vs_hidden = 0,
Andreas Gruenbachera257cdd2005-06-22 17:16:26 +0000356};