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Andreas Gruenbachera257cdd2005-06-22 17:16:26 +00001/*
Andreas Gruenbachera257cdd2005-06-22 17:16:26 +00002 * Process version 3 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>
Boaz Harrosh9a74af22009-12-03 20:30:56 +020010#include "cache.h"
11#include "xdr3.h"
J. Bruce Fields0a3adad2009-11-04 18:12:35 -050012#include "vfs.h"
Andreas Gruenbachera257cdd2005-06-22 17:16:26 +000013
14#define RETURN_STATUS(st) { resp->status = (st); return (st); }
15
16/*
17 * NULL call.
18 */
Al Viro7111c662006-10-19 23:28:45 -070019static __be32
Andreas Gruenbachera257cdd2005-06-22 17:16:26 +000020nfsd3_proc_null(struct svc_rqst *rqstp, void *argp, void *resp)
21{
22 return nfs_ok;
23}
24
25/*
26 * Get the Access and/or Default ACL of a file.
27 */
Al Viro7111c662006-10-19 23:28:45 -070028static __be32 nfsd3_proc_getacl(struct svc_rqst * rqstp,
Andreas Gruenbachera257cdd2005-06-22 17:16:26 +000029 struct nfsd3_getaclargs *argp, struct nfsd3_getaclres *resp)
30{
31 svc_fh *fh;
32 struct posix_acl *acl;
Al Viroc4d987b2006-10-19 23:29:00 -070033 __be32 nfserr = 0;
Andreas Gruenbachera257cdd2005-06-22 17:16:26 +000034
35 fh = fh_copy(&resp->fh, &argp->fh);
Miklos Szeredi8837abc2008-06-16 13:20:29 +020036 nfserr = fh_verify(rqstp, &resp->fh, 0, NFSD_MAY_NOP);
37 if (nfserr)
J. Bruce Fieldsac8587d2007-11-12 16:05:02 -050038 RETURN_STATUS(nfserr);
Andreas Gruenbachera257cdd2005-06-22 17:16:26 +000039
40 if (argp->mask & ~(NFS_ACL|NFS_ACLCNT|NFS_DFACL|NFS_DFACLCNT))
41 RETURN_STATUS(nfserr_inval);
42 resp->mask = argp->mask;
43
44 if (resp->mask & (NFS_ACL|NFS_ACLCNT)) {
45 acl = nfsd_get_posix_acl(fh, ACL_TYPE_ACCESS);
46 if (IS_ERR(acl)) {
47 int err = PTR_ERR(acl);
48
49 if (err == -ENODATA || err == -EOPNOTSUPP)
50 acl = NULL;
51 else {
52 nfserr = nfserrno(err);
53 goto fail;
54 }
55 }
56 if (acl == NULL) {
57 /* Solaris returns the inode's minimum ACL. */
58
59 struct inode *inode = fh->fh_dentry->d_inode;
60 acl = posix_acl_from_mode(inode->i_mode, GFP_KERNEL);
61 }
62 resp->acl_access = acl;
63 }
64 if (resp->mask & (NFS_DFACL|NFS_DFACLCNT)) {
65 /* Check how Solaris handles requests for the Default ACL
66 of a non-directory! */
67
68 acl = nfsd_get_posix_acl(fh, ACL_TYPE_DEFAULT);
69 if (IS_ERR(acl)) {
70 int err = PTR_ERR(acl);
71
72 if (err == -ENODATA || err == -EOPNOTSUPP)
73 acl = NULL;
74 else {
75 nfserr = nfserrno(err);
76 goto fail;
77 }
78 }
79 resp->acl_default = acl;
80 }
81
82 /* resp->acl_{access,default} are released in nfs3svc_release_getacl. */
83 RETURN_STATUS(0);
84
85fail:
86 posix_acl_release(resp->acl_access);
87 posix_acl_release(resp->acl_default);
88 RETURN_STATUS(nfserr);
89}
90
91/*
92 * Set the Access and/or Default ACL of a file.
93 */
Al Viro7111c662006-10-19 23:28:45 -070094static __be32 nfsd3_proc_setacl(struct svc_rqst * rqstp,
Andreas Gruenbachera257cdd2005-06-22 17:16:26 +000095 struct nfsd3_setaclargs *argp,
96 struct nfsd3_attrstat *resp)
97{
98 svc_fh *fh;
Al Viroc4d987b2006-10-19 23:29:00 -070099 __be32 nfserr = 0;
Andreas Gruenbachera257cdd2005-06-22 17:16:26 +0000100
101 fh = fh_copy(&resp->fh, &argp->fh);
Miklos Szeredi8837abc2008-06-16 13:20:29 +0200102 nfserr = fh_verify(rqstp, &resp->fh, 0, NFSD_MAY_SATTR);
Andreas Gruenbachera257cdd2005-06-22 17:16:26 +0000103
104 if (!nfserr) {
105 nfserr = nfserrno( nfsd_set_posix_acl(
106 fh, ACL_TYPE_ACCESS, argp->acl_access) );
107 }
108 if (!nfserr) {
109 nfserr = nfserrno( nfsd_set_posix_acl(
110 fh, ACL_TYPE_DEFAULT, argp->acl_default) );
111 }
112
113 /* argp->acl_{access,default} may have been allocated in
114 nfs3svc_decode_setaclargs. */
115 posix_acl_release(argp->acl_access);
116 posix_acl_release(argp->acl_default);
117 RETURN_STATUS(nfserr);
118}
119
120/*
121 * XDR decode functions
122 */
Al Viro91f07162006-10-19 23:28:57 -0700123static int nfs3svc_decode_getaclargs(struct svc_rqst *rqstp, __be32 *p,
Andreas Gruenbachera257cdd2005-06-22 17:16:26 +0000124 struct nfsd3_getaclargs *args)
125{
126 if (!(p = nfs3svc_decode_fh(p, &args->fh)))
127 return 0;
128 args->mask = ntohl(*p); p++;
129
130 return xdr_argsize_check(rqstp, p);
131}
132
133
Al Viro91f07162006-10-19 23:28:57 -0700134static int nfs3svc_decode_setaclargs(struct svc_rqst *rqstp, __be32 *p,
Andreas Gruenbachera257cdd2005-06-22 17:16:26 +0000135 struct nfsd3_setaclargs *args)
136{
137 struct kvec *head = rqstp->rq_arg.head;
138 unsigned int base;
139 int n;
140
141 if (!(p = nfs3svc_decode_fh(p, &args->fh)))
142 return 0;
143 args->mask = ntohl(*p++);
144 if (args->mask & ~(NFS_ACL|NFS_ACLCNT|NFS_DFACL|NFS_DFACLCNT) ||
145 !xdr_argsize_check(rqstp, p))
146 return 0;
147
148 base = (char *)p - (char *)head->iov_base;
149 n = nfsacl_decode(&rqstp->rq_arg, base, NULL,
150 (args->mask & NFS_ACL) ?
151 &args->acl_access : NULL);
152 if (n > 0)
153 n = nfsacl_decode(&rqstp->rq_arg, base + n, NULL,
154 (args->mask & NFS_DFACL) ?
155 &args->acl_default : NULL);
156 return (n > 0);
157}
158
159/*
160 * XDR encode functions
161 */
162
163/* GETACL */
Al Viro91f07162006-10-19 23:28:57 -0700164static int nfs3svc_encode_getaclres(struct svc_rqst *rqstp, __be32 *p,
Andreas Gruenbachera257cdd2005-06-22 17:16:26 +0000165 struct nfsd3_getaclres *resp)
166{
167 struct dentry *dentry = resp->fh.fh_dentry;
168
169 p = nfs3svc_encode_post_op_attr(rqstp, p, &resp->fh);
170 if (resp->status == 0 && dentry && dentry->d_inode) {
171 struct inode *inode = dentry->d_inode;
Andreas Gruenbachera257cdd2005-06-22 17:16:26 +0000172 struct kvec *head = rqstp->rq_res.head;
173 unsigned int base;
174 int n;
Jesper Juhl14d2b592006-12-08 02:39:40 -0800175 int w;
Andreas Gruenbachera257cdd2005-06-22 17:16:26 +0000176
177 *p++ = htonl(resp->mask);
178 if (!xdr_ressize_check(rqstp, p))
179 return 0;
180 base = (char *)p - (char *)head->iov_base;
181
Jesper Juhl14d2b592006-12-08 02:39:40 -0800182 rqstp->rq_res.page_len = w = nfsacl_size(
183 (resp->mask & NFS_ACL) ? resp->acl_access : NULL,
184 (resp->mask & NFS_DFACL) ? resp->acl_default : NULL);
Andreas Gruenbachera257cdd2005-06-22 17:16:26 +0000185 while (w > 0) {
NeilBrown44524352006-10-04 02:15:46 -0700186 if (!rqstp->rq_respages[rqstp->rq_resused++])
Andreas Gruenbachera257cdd2005-06-22 17:16:26 +0000187 return 0;
188 w -= PAGE_SIZE;
189 }
190
191 n = nfsacl_encode(&rqstp->rq_res, base, inode,
192 resp->acl_access,
193 resp->mask & NFS_ACL, 0);
194 if (n > 0)
195 n = nfsacl_encode(&rqstp->rq_res, base + n, inode,
196 resp->acl_default,
197 resp->mask & NFS_DFACL,
198 NFS_ACL_DEFAULT);
199 if (n <= 0)
200 return 0;
201 } else
202 if (!xdr_ressize_check(rqstp, p))
203 return 0;
204
205 return 1;
206}
207
208/* SETACL */
Al Viro91f07162006-10-19 23:28:57 -0700209static int nfs3svc_encode_setaclres(struct svc_rqst *rqstp, __be32 *p,
Andreas Gruenbachera257cdd2005-06-22 17:16:26 +0000210 struct nfsd3_attrstat *resp)
211{
212 p = nfs3svc_encode_post_op_attr(rqstp, p, &resp->fh);
213
214 return xdr_ressize_check(rqstp, p);
215}
216
217/*
218 * XDR release functions
219 */
Al Viro91f07162006-10-19 23:28:57 -0700220static int nfs3svc_release_getacl(struct svc_rqst *rqstp, __be32 *p,
Andreas Gruenbachera257cdd2005-06-22 17:16:26 +0000221 struct nfsd3_getaclres *resp)
222{
223 fh_put(&resp->fh);
224 posix_acl_release(resp->acl_access);
225 posix_acl_release(resp->acl_default);
226 return 1;
227}
228
229#define nfs3svc_decode_voidargs NULL
230#define nfs3svc_release_void NULL
231#define nfsd3_setaclres nfsd3_attrstat
232#define nfsd3_voidres nfsd3_voidargs
233struct nfsd3_voidargs { int dummy; };
234
235#define PROC(name, argt, rest, relt, cache, respsize) \
236 { (svc_procfunc) nfsd3_proc_##name, \
237 (kxdrproc_t) nfs3svc_decode_##argt##args, \
238 (kxdrproc_t) nfs3svc_encode_##rest##res, \
239 (kxdrproc_t) nfs3svc_release_##relt, \
240 sizeof(struct nfsd3_##argt##args), \
241 sizeof(struct nfsd3_##rest##res), \
242 0, \
243 cache, \
244 respsize, \
245 }
246
247#define ST 1 /* status*/
248#define AT 21 /* attributes */
249#define pAT (1+AT) /* post attributes - conditional */
250#define ACL (1+NFS_ACL_MAX_ENTRIES*3) /* Access Control List */
251
252static struct svc_procedure nfsd_acl_procedures3[] = {
253 PROC(null, void, void, void, RC_NOCACHE, ST),
254 PROC(getacl, getacl, getacl, getacl, RC_NOCACHE, ST+1+2*(1+ACL)),
255 PROC(setacl, setacl, setacl, fhandle, RC_NOCACHE, ST+pAT),
256};
257
258struct svc_version nfsd_acl_version3 = {
259 .vs_vers = 3,
260 .vs_nproc = 3,
261 .vs_proc = nfsd_acl_procedures3,
262 .vs_dispatch = nfsd_dispatch,
263 .vs_xdrsize = NFS3_SVC_XDRSIZE,
Peter Staubach1b7e0402009-11-02 16:59:07 -0500264 .vs_hidden = 0,
Andreas Gruenbachera257cdd2005-06-22 17:16:26 +0000265};
266