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8#include "nfsd.h"
9
10#include <linux/nfsacl.h>
11#include <linux/gfp.h>
12#include "cache.h"
13#include "xdr3.h"
14#include "vfs.h"
15
16#define NFSDDBG_FACILITY NFSDDBG_PROC
17#define RETURN_STATUS(st) { resp->status = (st); return (st); }
18
19
20
21
22static __be32
23nfsacld_proc_null(struct svc_rqst *rqstp)
24{
25 return nfs_ok;
26}
27
28
29
30
31static __be32 nfsacld_proc_getacl(struct svc_rqst *rqstp)
32{
33 struct nfsd3_getaclargs *argp = rqstp->rq_argp;
34 struct nfsd3_getaclres *resp = rqstp->rq_resp;
35 struct posix_acl *acl;
36 struct inode *inode;
37 svc_fh *fh;
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 inode = d_inode(fh->fh_dentry);
48
49 if (argp->mask & ~NFS_ACL_MASK)
50 RETURN_STATUS(nfserr_inval);
51 resp->mask = argp->mask;
52
53 nfserr = fh_getattr(fh, &resp->stat);
54 if (nfserr)
55 RETURN_STATUS(nfserr);
56
57 if (resp->mask & (NFS_ACL|NFS_ACLCNT)) {
58 acl = get_acl(inode, ACL_TYPE_ACCESS);
59 if (acl == NULL) {
60
61 acl = posix_acl_from_mode(inode->i_mode, GFP_KERNEL);
62 }
63 if (IS_ERR(acl)) {
64 nfserr = nfserrno(PTR_ERR(acl));
65 goto fail;
66 }
67 resp->acl_access = acl;
68 }
69 if (resp->mask & (NFS_DFACL|NFS_DFACLCNT)) {
70
71
72 acl = get_acl(inode, ACL_TYPE_DEFAULT);
73 if (IS_ERR(acl)) {
74 nfserr = nfserrno(PTR_ERR(acl));
75 goto fail;
76 }
77 resp->acl_default = acl;
78 }
79
80
81 RETURN_STATUS(0);
82
83fail:
84 posix_acl_release(resp->acl_access);
85 posix_acl_release(resp->acl_default);
86 RETURN_STATUS(nfserr);
87}
88
89
90
91
92static __be32 nfsacld_proc_setacl(struct svc_rqst *rqstp)
93{
94 struct nfsd3_setaclargs *argp = rqstp->rq_argp;
95 struct nfsd_attrstat *resp = rqstp->rq_resp;
96 struct inode *inode;
97 svc_fh *fh;
98 __be32 nfserr = 0;
99 int error;
100
101 dprintk("nfsd: SETACL(2acl) %s\n", SVCFH_fmt(&argp->fh));
102
103 fh = fh_copy(&resp->fh, &argp->fh);
104 nfserr = fh_verify(rqstp, &resp->fh, 0, NFSD_MAY_SATTR);
105 if (nfserr)
106 goto out;
107
108 inode = d_inode(fh->fh_dentry);
109
110 error = fh_want_write(fh);
111 if (error)
112 goto out_errno;
113
114 fh_lock(fh);
115
116 error = set_posix_acl(inode, ACL_TYPE_ACCESS, argp->acl_access);
117 if (error)
118 goto out_drop_lock;
119 error = set_posix_acl(inode, ACL_TYPE_DEFAULT, argp->acl_default);
120 if (error)
121 goto out_drop_lock;
122
123 fh_unlock(fh);
124
125 fh_drop_write(fh);
126
127 nfserr = fh_getattr(fh, &resp->stat);
128
129out:
130
131
132 posix_acl_release(argp->acl_access);
133 posix_acl_release(argp->acl_default);
134 return nfserr;
135out_drop_lock:
136 fh_unlock(fh);
137 fh_drop_write(fh);
138out_errno:
139 nfserr = nfserrno(error);
140 goto out;
141}
142
143
144
145
146static __be32 nfsacld_proc_getattr(struct svc_rqst *rqstp)
147{
148 struct nfsd_fhandle *argp = rqstp->rq_argp;
149 struct nfsd_attrstat *resp = rqstp->rq_resp;
150 __be32 nfserr;
151 dprintk("nfsd: GETATTR %s\n", SVCFH_fmt(&argp->fh));
152
153 fh_copy(&resp->fh, &argp->fh);
154 nfserr = fh_verify(rqstp, &resp->fh, 0, NFSD_MAY_NOP);
155 if (nfserr)
156 return nfserr;
157 nfserr = fh_getattr(&resp->fh, &resp->stat);
158 return nfserr;
159}
160
161
162
163
164static __be32 nfsacld_proc_access(struct svc_rqst *rqstp)
165{
166 struct nfsd3_accessargs *argp = rqstp->rq_argp;
167 struct nfsd3_accessres *resp = rqstp->rq_resp;
168 __be32 nfserr;
169
170 dprintk("nfsd: ACCESS(2acl) %s 0x%x\n",
171 SVCFH_fmt(&argp->fh),
172 argp->access);
173
174 fh_copy(&resp->fh, &argp->fh);
175 resp->access = argp->access;
176 nfserr = nfsd_access(rqstp, &resp->fh, &resp->access, NULL);
177 if (nfserr)
178 return nfserr;
179 nfserr = fh_getattr(&resp->fh, &resp->stat);
180 return nfserr;
181}
182
183
184
185
186static int nfsaclsvc_decode_getaclargs(struct svc_rqst *rqstp, __be32 *p)
187{
188 struct nfsd3_getaclargs *argp = rqstp->rq_argp;
189
190 p = nfs2svc_decode_fh(p, &argp->fh);
191 if (!p)
192 return 0;
193 argp->mask = ntohl(*p); p++;
194
195 return xdr_argsize_check(rqstp, p);
196}
197
198
199static int nfsaclsvc_decode_setaclargs(struct svc_rqst *rqstp, __be32 *p)
200{
201 struct nfsd3_setaclargs *argp = rqstp->rq_argp;
202 struct kvec *head = rqstp->rq_arg.head;
203 unsigned int base;
204 int n;
205
206 p = nfs2svc_decode_fh(p, &argp->fh);
207 if (!p)
208 return 0;
209 argp->mask = ntohl(*p++);
210 if (argp->mask & ~NFS_ACL_MASK ||
211 !xdr_argsize_check(rqstp, p))
212 return 0;
213
214 base = (char *)p - (char *)head->iov_base;
215 n = nfsacl_decode(&rqstp->rq_arg, base, NULL,
216 (argp->mask & NFS_ACL) ?
217 &argp->acl_access : NULL);
218 if (n > 0)
219 n = nfsacl_decode(&rqstp->rq_arg, base + n, NULL,
220 (argp->mask & NFS_DFACL) ?
221 &argp->acl_default : NULL);
222 return (n > 0);
223}
224
225static int nfsaclsvc_decode_fhandleargs(struct svc_rqst *rqstp, __be32 *p)
226{
227 struct nfsd_fhandle *argp = rqstp->rq_argp;
228
229 p = nfs2svc_decode_fh(p, &argp->fh);
230 if (!p)
231 return 0;
232 return xdr_argsize_check(rqstp, p);
233}
234
235static int nfsaclsvc_decode_accessargs(struct svc_rqst *rqstp, __be32 *p)
236{
237 struct nfsd3_accessargs *argp = rqstp->rq_argp;
238
239 p = nfs2svc_decode_fh(p, &argp->fh);
240 if (!p)
241 return 0;
242 argp->access = ntohl(*p++);
243
244 return xdr_argsize_check(rqstp, p);
245}
246
247
248
249
250
251
252
253
254
255static int nfsaclsvc_encode_voidres(struct svc_rqst *rqstp, __be32 *p)
256{
257 return xdr_ressize_check(rqstp, p);
258}
259
260
261static int nfsaclsvc_encode_getaclres(struct svc_rqst *rqstp, __be32 *p)
262{
263 struct nfsd3_getaclres *resp = rqstp->rq_resp;
264 struct dentry *dentry = resp->fh.fh_dentry;
265 struct inode *inode;
266 struct kvec *head = rqstp->rq_res.head;
267 unsigned int base;
268 int n;
269 int w;
270
271
272
273
274
275
276 if (dentry == NULL || d_really_is_negative(dentry))
277 return 0;
278 inode = d_inode(dentry);
279
280 p = nfs2svc_encode_fattr(rqstp, p, &resp->fh, &resp->stat);
281 *p++ = htonl(resp->mask);
282 if (!xdr_ressize_check(rqstp, p))
283 return 0;
284 base = (char *)p - (char *)head->iov_base;
285
286 rqstp->rq_res.page_len = w = nfsacl_size(
287 (resp->mask & NFS_ACL) ? resp->acl_access : NULL,
288 (resp->mask & NFS_DFACL) ? resp->acl_default : NULL);
289 while (w > 0) {
290 if (!*(rqstp->rq_next_page++))
291 return 0;
292 w -= PAGE_SIZE;
293 }
294
295 n = nfsacl_encode(&rqstp->rq_res, base, inode,
296 resp->acl_access,
297 resp->mask & NFS_ACL, 0);
298 if (n > 0)
299 n = nfsacl_encode(&rqstp->rq_res, base + n, inode,
300 resp->acl_default,
301 resp->mask & NFS_DFACL,
302 NFS_ACL_DEFAULT);
303 return (n > 0);
304}
305
306static int nfsaclsvc_encode_attrstatres(struct svc_rqst *rqstp, __be32 *p)
307{
308 struct nfsd_attrstat *resp = rqstp->rq_resp;
309
310 p = nfs2svc_encode_fattr(rqstp, p, &resp->fh, &resp->stat);
311 return xdr_ressize_check(rqstp, p);
312}
313
314
315static int nfsaclsvc_encode_accessres(struct svc_rqst *rqstp, __be32 *p)
316{
317 struct nfsd3_accessres *resp = rqstp->rq_resp;
318
319 p = nfs2svc_encode_fattr(rqstp, p, &resp->fh, &resp->stat);
320 *p++ = htonl(resp->access);
321 return xdr_ressize_check(rqstp, p);
322}
323
324
325
326
327static void nfsaclsvc_release_getacl(struct svc_rqst *rqstp)
328{
329 struct nfsd3_getaclres *resp = rqstp->rq_resp;
330
331 fh_put(&resp->fh);
332 posix_acl_release(resp->acl_access);
333 posix_acl_release(resp->acl_default);
334}
335
336static void nfsaclsvc_release_attrstat(struct svc_rqst *rqstp)
337{
338 struct nfsd_attrstat *resp = rqstp->rq_resp;
339
340 fh_put(&resp->fh);
341}
342
343static void nfsaclsvc_release_access(struct svc_rqst *rqstp)
344{
345 struct nfsd3_accessres *resp = rqstp->rq_resp;
346
347 fh_put(&resp->fh);
348}
349
350#define nfsaclsvc_decode_voidargs NULL
351#define nfsaclsvc_release_void NULL
352#define nfsd3_fhandleargs nfsd_fhandle
353#define nfsd3_attrstatres nfsd_attrstat
354#define nfsd3_voidres nfsd3_voidargs
355struct nfsd3_voidargs { int dummy; };
356
357#define PROC(name, argt, rest, relt, cache, respsize) \
358{ \
359 .pc_func = nfsacld_proc_##name, \
360 .pc_decode = nfsaclsvc_decode_##argt##args, \
361 .pc_encode = nfsaclsvc_encode_##rest##res, \
362 .pc_release = nfsaclsvc_release_##relt, \
363 .pc_argsize = sizeof(struct nfsd3_##argt##args), \
364 .pc_ressize = sizeof(struct nfsd3_##rest##res), \
365 .pc_cachetype = cache, \
366 .pc_xdrressize = respsize, \
367}
368
369#define ST 1
370#define AT 21
371#define pAT (1+AT)
372#define ACL (1+NFS_ACL_MAX_ENTRIES*3)
373
374static const struct svc_procedure nfsd_acl_procedures2[] = {
375 PROC(null, void, void, void, RC_NOCACHE, ST),
376 PROC(getacl, getacl, getacl, getacl, RC_NOCACHE, ST+1+2*(1+ACL)),
377 PROC(setacl, setacl, attrstat, attrstat, RC_NOCACHE, ST+AT),
378 PROC(getattr, fhandle, attrstat, attrstat, RC_NOCACHE, ST+AT),
379 PROC(access, access, access, access, RC_NOCACHE, ST+AT+1),
380};
381
382static unsigned int nfsd_acl_count2[ARRAY_SIZE(nfsd_acl_procedures2)];
383const struct svc_version nfsd_acl_version2 = {
384 .vs_vers = 2,
385 .vs_nproc = 5,
386 .vs_proc = nfsd_acl_procedures2,
387 .vs_count = nfsd_acl_count2,
388 .vs_dispatch = nfsd_dispatch,
389 .vs_xdrsize = NFS3_SVC_XDRSIZE,
390};
391
