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