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9#include <linux/sunrpc/svc.h>
10#include <linux/nfs.h>
11#include <linux/nfsd/nfsd.h>
12#include <linux/nfsd/cache.h>
13#include <linux/nfsd/xdr.h>
14#include <linux/nfsd/xdr3.h>
15#include <linux/posix_acl.h>
16#include <linux/nfsacl.h>
17
18#define NFSDDBG_FACILITY NFSDDBG_PROC
19#define RETURN_STATUS(st) { resp->status = (st); return (st); }
20
21
22
23
24static __be32
25nfsacld_proc_null(struct svc_rqst *rqstp, void *argp, void *resp)
26{
27 return nfs_ok;
28}
29
30
31
32
33static __be32 nfsacld_proc_getacl(struct svc_rqst * rqstp,
34 struct nfsd3_getaclargs *argp, struct nfsd3_getaclres *resp)
35{
36 svc_fh *fh;
37 struct posix_acl *acl;
38 __be32 nfserr = 0;
39
40 dprintk("nfsd: GETACL(2acl) %s\n", SVCFH_fmt(&argp->fh));
41
42 fh = fh_copy(&resp->fh, &argp->fh);
43 nfserr = fh_verify(rqstp, &resp->fh, 0, NFSD_MAY_NOP);
44 if (nfserr)
45 RETURN_STATUS(nfserr);
46
47 if (argp->mask & ~(NFS_ACL|NFS_ACLCNT|NFS_DFACL|NFS_DFACLCNT))
48 RETURN_STATUS(nfserr_inval);
49 resp->mask = argp->mask;
50
51 if (resp->mask & (NFS_ACL|NFS_ACLCNT)) {
52 acl = nfsd_get_posix_acl(fh, ACL_TYPE_ACCESS);
53 if (IS_ERR(acl)) {
54 int err = PTR_ERR(acl);
55
56 if (err == -ENODATA || err == -EOPNOTSUPP)
57 acl = NULL;
58 else {
59 nfserr = nfserrno(err);
60 goto fail;
61 }
62 }
63 if (acl == NULL) {
64
65
66 struct inode *inode = fh->fh_dentry->d_inode;
67 acl = posix_acl_from_mode(inode->i_mode, GFP_KERNEL);
68 }
69 resp->acl_access = acl;
70 }
71 if (resp->mask & (NFS_DFACL|NFS_DFACLCNT)) {
72
73
74
75 acl = nfsd_get_posix_acl(fh, ACL_TYPE_DEFAULT);
76 if (IS_ERR(acl)) {
77 int err = PTR_ERR(acl);
78
79 if (err == -ENODATA || err == -EOPNOTSUPP)
80 acl = NULL;
81 else {
82 nfserr = nfserrno(err);
83 goto fail;
84 }
85 }
86 resp->acl_default = acl;
87 }
88
89
90 RETURN_STATUS(0);
91
92fail:
93 posix_acl_release(resp->acl_access);
94 posix_acl_release(resp->acl_default);
95 RETURN_STATUS(nfserr);
96}
97
98
99
100
101static __be32 nfsacld_proc_setacl(struct svc_rqst * rqstp,
102 struct nfsd3_setaclargs *argp,
103 struct nfsd_attrstat *resp)
104{
105 svc_fh *fh;
106 __be32 nfserr = 0;
107
108 dprintk("nfsd: SETACL(2acl) %s\n", SVCFH_fmt(&argp->fh));
109
110 fh = fh_copy(&resp->fh, &argp->fh);
111 nfserr = fh_verify(rqstp, &resp->fh, 0, NFSD_MAY_SATTR);
112
113 if (!nfserr) {
114 nfserr = nfserrno( nfsd_set_posix_acl(
115 fh, ACL_TYPE_ACCESS, argp->acl_access) );
116 }
117 if (!nfserr) {
118 nfserr = nfserrno( nfsd_set_posix_acl(
119 fh, ACL_TYPE_DEFAULT, argp->acl_default) );
120 }
121
122
123
124 posix_acl_release(argp->acl_access);
125 posix_acl_release(argp->acl_default);
126 return nfserr;
127}
128
129
130
131
132static __be32 nfsacld_proc_getattr(struct svc_rqst * rqstp,
133 struct nfsd_fhandle *argp, struct nfsd_attrstat *resp)
134{
135 dprintk("nfsd: GETATTR %s\n", SVCFH_fmt(&argp->fh));
136
137 fh_copy(&resp->fh, &argp->fh);
138 return fh_verify(rqstp, &resp->fh, 0, NFSD_MAY_NOP);
139}
140
141
142
143
144static __be32 nfsacld_proc_access(struct svc_rqst *rqstp, struct nfsd3_accessargs *argp,
145 struct nfsd3_accessres *resp)
146{
147 __be32 nfserr;
148
149 dprintk("nfsd: ACCESS(2acl) %s 0x%x\n",
150 SVCFH_fmt(&argp->fh),
151 argp->access);
152
153 fh_copy(&resp->fh, &argp->fh);
154 resp->access = argp->access;
155 nfserr = nfsd_access(rqstp, &resp->fh, &resp->access, NULL);
156 return nfserr;
157}
158
159
160
161
162static int nfsaclsvc_decode_getaclargs(struct svc_rqst *rqstp, __be32 *p,
163 struct nfsd3_getaclargs *argp)
164{
165 if (!(p = nfs2svc_decode_fh(p, &argp->fh)))
166 return 0;
167 argp->mask = ntohl(*p); p++;
168
169 return xdr_argsize_check(rqstp, p);
170}
171
172
173static int nfsaclsvc_decode_setaclargs(struct svc_rqst *rqstp, __be32 *p,
174 struct nfsd3_setaclargs *argp)
175{
176 struct kvec *head = rqstp->rq_arg.head;
177 unsigned int base;
178 int n;
179
180 if (!(p = nfs2svc_decode_fh(p, &argp->fh)))
181 return 0;
182 argp->mask = ntohl(*p++);
183 if (argp->mask & ~(NFS_ACL|NFS_ACLCNT|NFS_DFACL|NFS_DFACLCNT) ||
184 !xdr_argsize_check(rqstp, p))
185 return 0;
186
187 base = (char *)p - (char *)head->iov_base;
188 n = nfsacl_decode(&rqstp->rq_arg, base, NULL,
189 (argp->mask & NFS_ACL) ?
190 &argp->acl_access : NULL);
191 if (n > 0)
192 n = nfsacl_decode(&rqstp->rq_arg, base + n, NULL,
193 (argp->mask & NFS_DFACL) ?
194 &argp->acl_default : NULL);
195 return (n > 0);
196}
197
198static int nfsaclsvc_decode_fhandleargs(struct svc_rqst *rqstp, __be32 *p,
199 struct nfsd_fhandle *argp)
200{
201 if (!(p = nfs2svc_decode_fh(p, &argp->fh)))
202 return 0;
203 return xdr_argsize_check(rqstp, p);
204}
205
206static int nfsaclsvc_decode_accessargs(struct svc_rqst *rqstp, __be32 *p,
207 struct nfsd3_accessargs *argp)
208{
209 if (!(p = nfs2svc_decode_fh(p, &argp->fh)))
210 return 0;
211 argp->access = ntohl(*p++);
212
213 return xdr_argsize_check(rqstp, p);
214}
215
216
217
218
219
220
221static int nfsaclsvc_encode_getaclres(struct svc_rqst *rqstp, __be32 *p,
222 struct nfsd3_getaclres *resp)
223{
224 struct dentry *dentry = resp->fh.fh_dentry;
225 struct inode *inode;
226 struct kvec *head = rqstp->rq_res.head;
227 unsigned int base;
228 int n;
229 int w;
230
231
232
233
234
235
236 if (dentry == NULL || dentry->d_inode == NULL)
237 return 0;
238 inode = dentry->d_inode;
239
240 p = nfs2svc_encode_fattr(rqstp, p, &resp->fh);
241 *p++ = htonl(resp->mask);
242 if (!xdr_ressize_check(rqstp, p))
243 return 0;
244 base = (char *)p - (char *)head->iov_base;
245
246 rqstp->rq_res.page_len = w = nfsacl_size(
247 (resp->mask & NFS_ACL) ? resp->acl_access : NULL,
248 (resp->mask & NFS_DFACL) ? resp->acl_default : NULL);
249 while (w > 0) {
250 if (!rqstp->rq_respages[rqstp->rq_resused++])
251 return 0;
252 w -= PAGE_SIZE;
253 }
254
255 n = nfsacl_encode(&rqstp->rq_res, base, inode,
256 resp->acl_access,
257 resp->mask & NFS_ACL, 0);
258 if (n > 0)
259 n = nfsacl_encode(&rqstp->rq_res, base + n, inode,
260 resp->acl_default,
261 resp->mask & NFS_DFACL,
262 NFS_ACL_DEFAULT);
263 if (n <= 0)
264 return 0;
265 return 1;
266}
267
268static int nfsaclsvc_encode_attrstatres(struct svc_rqst *rqstp, __be32 *p,
269 struct nfsd_attrstat *resp)
270{
271 p = nfs2svc_encode_fattr(rqstp, p, &resp->fh);
272 return xdr_ressize_check(rqstp, p);
273}
274
275
276static int nfsaclsvc_encode_accessres(struct svc_rqst *rqstp, __be32 *p,
277 struct nfsd3_accessres *resp)
278{
279 p = nfs2svc_encode_fattr(rqstp, p, &resp->fh);
280 *p++ = htonl(resp->access);
281 return xdr_ressize_check(rqstp, p);
282}
283
284
285
286
287static int nfsaclsvc_release_getacl(struct svc_rqst *rqstp, __be32 *p,
288 struct nfsd3_getaclres *resp)
289{
290 fh_put(&resp->fh);
291 posix_acl_release(resp->acl_access);
292 posix_acl_release(resp->acl_default);
293 return 1;
294}
295
296static int nfsaclsvc_release_attrstat(struct svc_rqst *rqstp, __be32 *p,
297 struct nfsd_attrstat *resp)
298{
299 fh_put(&resp->fh);
300 return 1;
301}
302
303static int nfsaclsvc_release_access(struct svc_rqst *rqstp, __be32 *p,
304 struct nfsd3_accessres *resp)
305{
306 fh_put(&resp->fh);
307 return 1;
308}
309
310#define nfsaclsvc_decode_voidargs NULL
311#define nfsaclsvc_encode_voidres NULL
312#define nfsaclsvc_release_void NULL
313#define nfsd3_fhandleargs nfsd_fhandle
314#define nfsd3_attrstatres nfsd_attrstat
315#define nfsd3_voidres nfsd3_voidargs
316struct nfsd3_voidargs { int dummy; };
317
318#define PROC(name, argt, rest, relt, cache, respsize) \
319 { (svc_procfunc) nfsacld_proc_##name, \
320 (kxdrproc_t) nfsaclsvc_decode_##argt##args, \
321 (kxdrproc_t) nfsaclsvc_encode_##rest##res, \
322 (kxdrproc_t) nfsaclsvc_release_##relt, \
323 sizeof(struct nfsd3_##argt##args), \
324 sizeof(struct nfsd3_##rest##res), \
325 0, \
326 cache, \
327 respsize, \
328 }
329
330#define ST 1
331#define AT 21
332#define pAT (1+AT)
333#define ACL (1+NFS_ACL_MAX_ENTRIES*3)
334
335static struct svc_procedure nfsd_acl_procedures2[] = {
336 PROC(null, void, void, void, RC_NOCACHE, ST),
337 PROC(getacl, getacl, getacl, getacl, RC_NOCACHE, ST+1+2*(1+ACL)),
338 PROC(setacl, setacl, attrstat, attrstat, RC_NOCACHE, ST+AT),
339 PROC(getattr, fhandle, attrstat, attrstat, RC_NOCACHE, ST+AT),
340 PROC(access, access, access, access, RC_NOCACHE, ST+AT+1),
341};
342
343struct svc_version nfsd_acl_version2 = {
344 .vs_vers = 2,
345 .vs_nproc = 5,
346 .vs_proc = nfsd_acl_procedures2,
347 .vs_dispatch = nfsd_dispatch,
348 .vs_xdrsize = NFS3_SVC_XDRSIZE,
349 .vs_hidden = 1,
350};
351
