1
2
3
4
5
6
7#include "nfsd.h"
8
9#include <linux/nfsacl.h>
10#include <linux/gfp.h>
11#include "cache.h"
12#include "xdr3.h"
13#include "vfs.h"
14
15#define NFSDDBG_FACILITY NFSDDBG_PROC
16#define RETURN_STATUS(st) { resp->status = (st); return (st); }
17
18
19
20
21static __be32
22nfsacld_proc_null(struct svc_rqst *rqstp, void *argp, void *resp)
23{
24 return nfs_ok;
25}
26
27
28
29
30static __be32 nfsacld_proc_getacl(struct svc_rqst * rqstp,
31 struct nfsd3_getaclargs *argp, struct nfsd3_getaclres *resp)
32{
33 struct posix_acl *acl;
34 struct inode *inode;
35 svc_fh *fh;
36 __be32 nfserr = 0;
37
38 dprintk("nfsd: GETACL(2acl) %s\n", SVCFH_fmt(&argp->fh));
39
40 fh = fh_copy(&resp->fh, &argp->fh);
41 nfserr = fh_verify(rqstp, &resp->fh, 0, NFSD_MAY_NOP);
42 if (nfserr)
43 RETURN_STATUS(nfserr);
44
45 inode = d_inode(fh->fh_dentry);
46
47 if (argp->mask & ~NFS_ACL_MASK)
48 RETURN_STATUS(nfserr_inval);
49 resp->mask = argp->mask;
50
51 nfserr = fh_getattr(fh, &resp->stat);
52 if (nfserr)
53 RETURN_STATUS(nfserr);
54
55 if (resp->mask & (NFS_ACL|NFS_ACLCNT)) {
56 acl = get_acl(inode, ACL_TYPE_ACCESS);
57 if (acl == NULL) {
58
59 acl = posix_acl_from_mode(inode->i_mode, GFP_KERNEL);
60 }
61 if (IS_ERR(acl)) {
62 nfserr = nfserrno(PTR_ERR(acl));
63 goto fail;
64 }
65 resp->acl_access = acl;
66 }
67 if (resp->mask & (NFS_DFACL|NFS_DFACLCNT)) {
68
69
70 acl = get_acl(inode, ACL_TYPE_DEFAULT);
71 if (IS_ERR(acl)) {
72 nfserr = nfserrno(PTR_ERR(acl));
73 goto fail;
74 }
75 resp->acl_default = acl;
76 }
77
78
79 RETURN_STATUS(0);
80
81fail:
82 posix_acl_release(resp->acl_access);
83 posix_acl_release(resp->acl_default);
84 RETURN_STATUS(nfserr);
85}
86
87
88
89
90static __be32 nfsacld_proc_setacl(struct svc_rqst * rqstp,
91 struct nfsd3_setaclargs *argp,
92 struct nfsd_attrstat *resp)
93{
94 struct inode *inode;
95 svc_fh *fh;
96 __be32 nfserr = 0;
97 int error;
98
99 dprintk("nfsd: SETACL(2acl) %s\n", SVCFH_fmt(&argp->fh));
100
101 fh = fh_copy(&resp->fh, &argp->fh);
102 nfserr = fh_verify(rqstp, &resp->fh, 0, NFSD_MAY_SATTR);
103 if (nfserr)
104 goto out;
105
106 inode = d_inode(fh->fh_dentry);
107 if (!IS_POSIXACL(inode) || !inode->i_op->set_acl) {
108 error = -EOPNOTSUPP;
109 goto out_errno;
110 }
111
112 error = fh_want_write(fh);
113 if (error)
114 goto out_errno;
115
116 error = inode->i_op->set_acl(inode, argp->acl_access, ACL_TYPE_ACCESS);
117 if (error)
118 goto out_drop_write;
119 error = inode->i_op->set_acl(inode, argp->acl_default,
120 ACL_TYPE_DEFAULT);
121 if (error)
122 goto out_drop_write;
123
124 fh_drop_write(fh);
125
126 nfserr = fh_getattr(fh, &resp->stat);
127
128out:
129
130
131 posix_acl_release(argp->acl_access);
132 posix_acl_release(argp->acl_default);
133 return nfserr;
134out_drop_write:
135 fh_drop_write(fh);
136out_errno:
137 nfserr = nfserrno(error);
138 goto out;
139}
140
141
142
143
144static __be32 nfsacld_proc_getattr(struct svc_rqst * rqstp,
145 struct nfsd_fhandle *argp, struct nfsd_attrstat *resp)
146{
147 __be32 nfserr;
148 dprintk("nfsd: GETATTR %s\n", SVCFH_fmt(&argp->fh));
149
150 fh_copy(&resp->fh, &argp->fh);
151 nfserr = fh_verify(rqstp, &resp->fh, 0, NFSD_MAY_NOP);
152 if (nfserr)
153 return nfserr;
154 nfserr = fh_getattr(&resp->fh, &resp->stat);
155 return nfserr;
156}
157
158
159
160
161static __be32 nfsacld_proc_access(struct svc_rqst *rqstp, struct nfsd3_accessargs *argp,
162 struct nfsd3_accessres *resp)
163{
164 __be32 nfserr;
165
166 dprintk("nfsd: ACCESS(2acl) %s 0x%x\n",
167 SVCFH_fmt(&argp->fh),
168 argp->access);
169
170 fh_copy(&resp->fh, &argp->fh);
171 resp->access = argp->access;
172 nfserr = nfsd_access(rqstp, &resp->fh, &resp->access, NULL);
173 if (nfserr)
174 return nfserr;
175 nfserr = fh_getattr(&resp->fh, &resp->stat);
176 return nfserr;
177}
178
179
180
181
182static int nfsaclsvc_decode_getaclargs(struct svc_rqst *rqstp, __be32 *p,
183 struct nfsd3_getaclargs *argp)
184{
185 p = nfs2svc_decode_fh(p, &argp->fh);
186 if (!p)
187 return 0;
188 argp->mask = ntohl(*p); p++;
189
190 return xdr_argsize_check(rqstp, p);
191}
192
193
194static int nfsaclsvc_decode_setaclargs(struct svc_rqst *rqstp, __be32 *p,
195 struct nfsd3_setaclargs *argp)
196{
197 struct kvec *head = rqstp->rq_arg.head;
198 unsigned int base;
199 int n;
200
201 p = nfs2svc_decode_fh(p, &argp->fh);
202 if (!p)
203 return 0;
204 argp->mask = ntohl(*p++);
205 if (argp->mask & ~NFS_ACL_MASK ||
206 !xdr_argsize_check(rqstp, p))
207 return 0;
208
209 base = (char *)p - (char *)head->iov_base;
210 n = nfsacl_decode(&rqstp->rq_arg, base, NULL,
211 (argp->mask & NFS_ACL) ?
212 &argp->acl_access : NULL);
213 if (n > 0)
214 n = nfsacl_decode(&rqstp->rq_arg, base + n, NULL,
215 (argp->mask & NFS_DFACL) ?
216 &argp->acl_default : NULL);
217 return (n > 0);
218}
219
220static int nfsaclsvc_decode_fhandleargs(struct svc_rqst *rqstp, __be32 *p,
221 struct nfsd_fhandle *argp)
222{
223 p = nfs2svc_decode_fh(p, &argp->fh);
224 if (!p)
225 return 0;
226 return xdr_argsize_check(rqstp, p);
227}
228
229static int nfsaclsvc_decode_accessargs(struct svc_rqst *rqstp, __be32 *p,
230 struct nfsd3_accessargs *argp)
231{
232 p = nfs2svc_decode_fh(p, &argp->fh);
233 if (!p)
234 return 0;
235 argp->access = ntohl(*p++);
236
237 return xdr_argsize_check(rqstp, p);
238}
239
240
241
242
243
244
245
246
247
248static int nfsaclsvc_encode_voidres(struct svc_rqst *rqstp, __be32 *p, void *dummy)
249{
250 return xdr_ressize_check(rqstp, p);
251}
252
253
254static int nfsaclsvc_encode_getaclres(struct svc_rqst *rqstp, __be32 *p,
255 struct nfsd3_getaclres *resp)
256{
257 struct dentry *dentry = resp->fh.fh_dentry;
258 struct inode *inode;
259 struct kvec *head = rqstp->rq_res.head;
260 unsigned int base;
261 int n;
262 int w;
263
264
265
266
267
268
269 if (dentry == NULL || d_really_is_negative(dentry))
270 return 0;
271 inode = d_inode(dentry);
272
273 p = nfs2svc_encode_fattr(rqstp, p, &resp->fh, &resp->stat);
274 *p++ = htonl(resp->mask);
275 if (!xdr_ressize_check(rqstp, p))
276 return 0;
277 base = (char *)p - (char *)head->iov_base;
278
279 rqstp->rq_res.page_len = w = nfsacl_size(
280 (resp->mask & NFS_ACL) ? resp->acl_access : NULL,
281 (resp->mask & NFS_DFACL) ? resp->acl_default : NULL);
282 while (w > 0) {
283 if (!*(rqstp->rq_next_page++))
284 return 0;
285 w -= PAGE_SIZE;
286 }
287
288 n = nfsacl_encode(&rqstp->rq_res, base, inode,
289 resp->acl_access,
290 resp->mask & NFS_ACL, 0);
291 if (n > 0)
292 n = nfsacl_encode(&rqstp->rq_res, base + n, inode,
293 resp->acl_default,
294 resp->mask & NFS_DFACL,
295 NFS_ACL_DEFAULT);
296 return (n > 0);
297}
298
299static int nfsaclsvc_encode_attrstatres(struct svc_rqst *rqstp, __be32 *p,
300 struct nfsd_attrstat *resp)
301{
302 p = nfs2svc_encode_fattr(rqstp, p, &resp->fh, &resp->stat);
303 return xdr_ressize_check(rqstp, p);
304}
305
306
307static int nfsaclsvc_encode_accessres(struct svc_rqst *rqstp, __be32 *p,
308 struct nfsd3_accessres *resp)
309{
310 p = nfs2svc_encode_fattr(rqstp, p, &resp->fh, &resp->stat);
311 *p++ = htonl(resp->access);
312 return xdr_ressize_check(rqstp, p);
313}
314
315
316
317
318static int nfsaclsvc_release_getacl(struct svc_rqst *rqstp, __be32 *p,
319 struct nfsd3_getaclres *resp)
320{
321 fh_put(&resp->fh);
322 posix_acl_release(resp->acl_access);
323 posix_acl_release(resp->acl_default);
324 return 1;
325}
326
327static int nfsaclsvc_release_attrstat(struct svc_rqst *rqstp, __be32 *p,
328 struct nfsd_attrstat *resp)
329{
330 fh_put(&resp->fh);
331 return 1;
332}
333
334static int nfsaclsvc_release_access(struct svc_rqst *rqstp, __be32 *p,
335 struct nfsd3_accessres *resp)
336{
337 fh_put(&resp->fh);
338 return 1;
339}
340
341#define nfsaclsvc_decode_voidargs NULL
342#define nfsaclsvc_release_void NULL
343#define nfsd3_fhandleargs nfsd_fhandle
344#define nfsd3_attrstatres nfsd_attrstat
345#define nfsd3_voidres nfsd3_voidargs
346struct nfsd3_voidargs { int dummy; };
347
348#define PROC(name, argt, rest, relt, cache, respsize) \
349 { (svc_procfunc) nfsacld_proc_##name, \
350 (kxdrproc_t) nfsaclsvc_decode_##argt##args, \
351 (kxdrproc_t) nfsaclsvc_encode_##rest##res, \
352 (kxdrproc_t) nfsaclsvc_release_##relt, \
353 sizeof(struct nfsd3_##argt##args), \
354 sizeof(struct nfsd3_##rest##res), \
355 0, \
356 cache, \
357 respsize, \
358 }
359
360#define ST 1
361#define AT 21
362#define pAT (1+AT)
363#define ACL (1+NFS_ACL_MAX_ENTRIES*3)
364
365static struct svc_procedure nfsd_acl_procedures2[] = {
366 PROC(null, void, void, void, RC_NOCACHE, ST),
367 PROC(getacl, getacl, getacl, getacl, RC_NOCACHE, ST+1+2*(1+ACL)),
368 PROC(setacl, setacl, attrstat, attrstat, RC_NOCACHE, ST+AT),
369 PROC(getattr, fhandle, attrstat, attrstat, RC_NOCACHE, ST+AT),
370 PROC(access, access, access, access, RC_NOCACHE, ST+AT+1),
371};
372
373struct svc_version nfsd_acl_version2 = {
374 .vs_vers = 2,
375 .vs_nproc = 5,
376 .vs_proc = nfsd_acl_procedures2,
377 .vs_dispatch = nfsd_dispatch,
378 .vs_xdrsize = NFS3_SVC_XDRSIZE,
379 .vs_hidden = 0,
380};
381
