Commit | Line | Data |
---|---|---|
a257cdd0 | 1 | /* |
a257cdd0 AG |
2 | * Process version 2 NFSACL requests. |
3 | * | |
4 | * Copyright (C) 2002-2003 Andreas Gruenbacher <agruen@suse.de> | |
5 | */ | |
6 | ||
9a74af21 BH |
7 | #include "nfsd.h" |
8 | /* FIXME: nfsacl.h is a broken header */ | |
a257cdd0 | 9 | #include <linux/nfsacl.h> |
9a74af21 BH |
10 | #include "cache.h" |
11 | #include "xdr3.h" | |
0a3adade | 12 | #include "vfs.h" |
a257cdd0 AG |
13 | |
14 | #define NFSDDBG_FACILITY NFSDDBG_PROC | |
15 | #define RETURN_STATUS(st) { resp->status = (st); return (st); } | |
16 | ||
17 | /* | |
18 | * NULL call. | |
19 | */ | |
7111c66e | 20 | static __be32 |
a257cdd0 AG |
21 | nfsacld_proc_null(struct svc_rqst *rqstp, void *argp, void *resp) |
22 | { | |
23 | return nfs_ok; | |
24 | } | |
25 | ||
26 | /* | |
27 | * Get the Access and/or Default ACL of a file. | |
28 | */ | |
7111c66e | 29 | static __be32 nfsacld_proc_getacl(struct svc_rqst * rqstp, |
a257cdd0 AG |
30 | struct nfsd3_getaclargs *argp, struct nfsd3_getaclres *resp) |
31 | { | |
32 | svc_fh *fh; | |
33 | struct posix_acl *acl; | |
c4d987ba | 34 | __be32 nfserr = 0; |
a257cdd0 AG |
35 | |
36 | dprintk("nfsd: GETACL(2acl) %s\n", SVCFH_fmt(&argp->fh)); | |
37 | ||
38 | fh = fh_copy(&resp->fh, &argp->fh); | |
8837abca MS |
39 | nfserr = fh_verify(rqstp, &resp->fh, 0, NFSD_MAY_NOP); |
40 | if (nfserr) | |
ac8587dc | 41 | RETURN_STATUS(nfserr); |
a257cdd0 AG |
42 | |
43 | if (argp->mask & ~(NFS_ACL|NFS_ACLCNT|NFS_DFACL|NFS_DFACLCNT)) | |
44 | RETURN_STATUS(nfserr_inval); | |
45 | resp->mask = argp->mask; | |
46 | ||
47 | if (resp->mask & (NFS_ACL|NFS_ACLCNT)) { | |
48 | acl = nfsd_get_posix_acl(fh, ACL_TYPE_ACCESS); | |
49 | if (IS_ERR(acl)) { | |
50 | int err = PTR_ERR(acl); | |
51 | ||
52 | if (err == -ENODATA || err == -EOPNOTSUPP) | |
53 | acl = NULL; | |
54 | else { | |
55 | nfserr = nfserrno(err); | |
56 | goto fail; | |
57 | } | |
58 | } | |
59 | if (acl == NULL) { | |
60 | /* Solaris returns the inode's minimum ACL. */ | |
61 | ||
62 | struct inode *inode = fh->fh_dentry->d_inode; | |
63 | acl = posix_acl_from_mode(inode->i_mode, GFP_KERNEL); | |
64 | } | |
65 | resp->acl_access = acl; | |
66 | } | |
67 | if (resp->mask & (NFS_DFACL|NFS_DFACLCNT)) { | |
68 | /* Check how Solaris handles requests for the Default ACL | |
69 | of a non-directory! */ | |
70 | ||
71 | acl = nfsd_get_posix_acl(fh, ACL_TYPE_DEFAULT); | |
72 | if (IS_ERR(acl)) { | |
73 | int err = PTR_ERR(acl); | |
74 | ||
75 | if (err == -ENODATA || err == -EOPNOTSUPP) | |
76 | acl = NULL; | |
77 | else { | |
78 | nfserr = nfserrno(err); | |
79 | goto fail; | |
80 | } | |
81 | } | |
82 | resp->acl_default = acl; | |
83 | } | |
84 | ||
85 | /* resp->acl_{access,default} are released in nfssvc_release_getacl. */ | |
86 | RETURN_STATUS(0); | |
87 | ||
88 | fail: | |
89 | posix_acl_release(resp->acl_access); | |
90 | posix_acl_release(resp->acl_default); | |
91 | RETURN_STATUS(nfserr); | |
92 | } | |
93 | ||
94 | /* | |
95 | * Set the Access and/or Default ACL of a file. | |
96 | */ | |
7111c66e | 97 | static __be32 nfsacld_proc_setacl(struct svc_rqst * rqstp, |
a257cdd0 AG |
98 | struct nfsd3_setaclargs *argp, |
99 | struct nfsd_attrstat *resp) | |
100 | { | |
101 | svc_fh *fh; | |
c4d987ba | 102 | __be32 nfserr = 0; |
a257cdd0 AG |
103 | |
104 | dprintk("nfsd: SETACL(2acl) %s\n", SVCFH_fmt(&argp->fh)); | |
105 | ||
106 | fh = fh_copy(&resp->fh, &argp->fh); | |
8837abca | 107 | nfserr = fh_verify(rqstp, &resp->fh, 0, NFSD_MAY_SATTR); |
a257cdd0 AG |
108 | |
109 | if (!nfserr) { | |
110 | nfserr = nfserrno( nfsd_set_posix_acl( | |
111 | fh, ACL_TYPE_ACCESS, argp->acl_access) ); | |
112 | } | |
113 | if (!nfserr) { | |
114 | nfserr = nfserrno( nfsd_set_posix_acl( | |
115 | fh, ACL_TYPE_DEFAULT, argp->acl_default) ); | |
116 | } | |
117 | ||
118 | /* argp->acl_{access,default} may have been allocated in | |
119 | nfssvc_decode_setaclargs. */ | |
120 | posix_acl_release(argp->acl_access); | |
121 | posix_acl_release(argp->acl_default); | |
122 | return nfserr; | |
123 | } | |
124 | ||
125 | /* | |
126 | * Check file attributes | |
127 | */ | |
7111c66e | 128 | static __be32 nfsacld_proc_getattr(struct svc_rqst * rqstp, |
a257cdd0 AG |
129 | struct nfsd_fhandle *argp, struct nfsd_attrstat *resp) |
130 | { | |
131 | dprintk("nfsd: GETATTR %s\n", SVCFH_fmt(&argp->fh)); | |
132 | ||
133 | fh_copy(&resp->fh, &argp->fh); | |
8837abca | 134 | return fh_verify(rqstp, &resp->fh, 0, NFSD_MAY_NOP); |
a257cdd0 AG |
135 | } |
136 | ||
137 | /* | |
138 | * Check file access | |
139 | */ | |
7111c66e | 140 | static __be32 nfsacld_proc_access(struct svc_rqst *rqstp, struct nfsd3_accessargs *argp, |
a257cdd0 AG |
141 | struct nfsd3_accessres *resp) |
142 | { | |
c4d987ba | 143 | __be32 nfserr; |
a257cdd0 AG |
144 | |
145 | dprintk("nfsd: ACCESS(2acl) %s 0x%x\n", | |
146 | SVCFH_fmt(&argp->fh), | |
147 | argp->access); | |
148 | ||
149 | fh_copy(&resp->fh, &argp->fh); | |
150 | resp->access = argp->access; | |
151 | nfserr = nfsd_access(rqstp, &resp->fh, &resp->access, NULL); | |
152 | return nfserr; | |
153 | } | |
154 | ||
155 | /* | |
156 | * XDR decode functions | |
157 | */ | |
131a21c2 | 158 | static int nfsaclsvc_decode_getaclargs(struct svc_rqst *rqstp, __be32 *p, |
a257cdd0 AG |
159 | struct nfsd3_getaclargs *argp) |
160 | { | |
161 | if (!(p = nfs2svc_decode_fh(p, &argp->fh))) | |
162 | return 0; | |
163 | argp->mask = ntohl(*p); p++; | |
164 | ||
165 | return xdr_argsize_check(rqstp, p); | |
166 | } | |
167 | ||
168 | ||
131a21c2 | 169 | static int nfsaclsvc_decode_setaclargs(struct svc_rqst *rqstp, __be32 *p, |
a257cdd0 AG |
170 | struct nfsd3_setaclargs *argp) |
171 | { | |
172 | struct kvec *head = rqstp->rq_arg.head; | |
173 | unsigned int base; | |
174 | int n; | |
175 | ||
176 | if (!(p = nfs2svc_decode_fh(p, &argp->fh))) | |
177 | return 0; | |
178 | argp->mask = ntohl(*p++); | |
179 | if (argp->mask & ~(NFS_ACL|NFS_ACLCNT|NFS_DFACL|NFS_DFACLCNT) || | |
180 | !xdr_argsize_check(rqstp, p)) | |
181 | return 0; | |
182 | ||
183 | base = (char *)p - (char *)head->iov_base; | |
184 | n = nfsacl_decode(&rqstp->rq_arg, base, NULL, | |
185 | (argp->mask & NFS_ACL) ? | |
186 | &argp->acl_access : NULL); | |
187 | if (n > 0) | |
188 | n = nfsacl_decode(&rqstp->rq_arg, base + n, NULL, | |
189 | (argp->mask & NFS_DFACL) ? | |
190 | &argp->acl_default : NULL); | |
191 | return (n > 0); | |
192 | } | |
193 | ||
131a21c2 | 194 | static int nfsaclsvc_decode_fhandleargs(struct svc_rqst *rqstp, __be32 *p, |
a257cdd0 AG |
195 | struct nfsd_fhandle *argp) |
196 | { | |
197 | if (!(p = nfs2svc_decode_fh(p, &argp->fh))) | |
198 | return 0; | |
199 | return xdr_argsize_check(rqstp, p); | |
200 | } | |
201 | ||
131a21c2 | 202 | static int nfsaclsvc_decode_accessargs(struct svc_rqst *rqstp, __be32 *p, |
a257cdd0 AG |
203 | struct nfsd3_accessargs *argp) |
204 | { | |
205 | if (!(p = nfs2svc_decode_fh(p, &argp->fh))) | |
206 | return 0; | |
207 | argp->access = ntohl(*p++); | |
208 | ||
209 | return xdr_argsize_check(rqstp, p); | |
210 | } | |
211 | ||
212 | /* | |
213 | * XDR encode functions | |
214 | */ | |
215 | ||
1b7e0403 PS |
216 | /* |
217 | * There must be an encoding function for void results so svc_process | |
218 | * will work properly. | |
219 | */ | |
220 | int | |
221 | nfsaclsvc_encode_voidres(struct svc_rqst *rqstp, __be32 *p, void *dummy) | |
222 | { | |
223 | return xdr_ressize_check(rqstp, p); | |
224 | } | |
225 | ||
a257cdd0 | 226 | /* GETACL */ |
131a21c2 | 227 | static int nfsaclsvc_encode_getaclres(struct svc_rqst *rqstp, __be32 *p, |
a257cdd0 AG |
228 | struct nfsd3_getaclres *resp) |
229 | { | |
230 | struct dentry *dentry = resp->fh.fh_dentry; | |
aefa89d1 | 231 | struct inode *inode; |
a257cdd0 AG |
232 | struct kvec *head = rqstp->rq_res.head; |
233 | unsigned int base; | |
234 | int n; | |
cb65a5ba | 235 | int w; |
a257cdd0 | 236 | |
aefa89d1 P |
237 | /* |
238 | * Since this is version 2, the check for nfserr in | |
239 | * nfsd_dispatch actually ensures the following cannot happen. | |
240 | * However, it seems fragile to depend on that. | |
241 | */ | |
a257cdd0 AG |
242 | if (dentry == NULL || dentry->d_inode == NULL) |
243 | return 0; | |
244 | inode = dentry->d_inode; | |
245 | ||
246 | p = nfs2svc_encode_fattr(rqstp, p, &resp->fh); | |
247 | *p++ = htonl(resp->mask); | |
248 | if (!xdr_ressize_check(rqstp, p)) | |
249 | return 0; | |
250 | base = (char *)p - (char *)head->iov_base; | |
251 | ||
cb65a5ba JJ |
252 | rqstp->rq_res.page_len = w = nfsacl_size( |
253 | (resp->mask & NFS_ACL) ? resp->acl_access : NULL, | |
254 | (resp->mask & NFS_DFACL) ? resp->acl_default : NULL); | |
a257cdd0 | 255 | while (w > 0) { |
44524359 | 256 | if (!rqstp->rq_respages[rqstp->rq_resused++]) |
a257cdd0 AG |
257 | return 0; |
258 | w -= PAGE_SIZE; | |
259 | } | |
260 | ||
261 | n = nfsacl_encode(&rqstp->rq_res, base, inode, | |
262 | resp->acl_access, | |
263 | resp->mask & NFS_ACL, 0); | |
264 | if (n > 0) | |
265 | n = nfsacl_encode(&rqstp->rq_res, base + n, inode, | |
266 | resp->acl_default, | |
267 | resp->mask & NFS_DFACL, | |
268 | NFS_ACL_DEFAULT); | |
269 | if (n <= 0) | |
270 | return 0; | |
271 | return 1; | |
272 | } | |
273 | ||
131a21c2 | 274 | static int nfsaclsvc_encode_attrstatres(struct svc_rqst *rqstp, __be32 *p, |
a257cdd0 AG |
275 | struct nfsd_attrstat *resp) |
276 | { | |
277 | p = nfs2svc_encode_fattr(rqstp, p, &resp->fh); | |
278 | return xdr_ressize_check(rqstp, p); | |
279 | } | |
280 | ||
281 | /* ACCESS */ | |
131a21c2 | 282 | static int nfsaclsvc_encode_accessres(struct svc_rqst *rqstp, __be32 *p, |
a257cdd0 AG |
283 | struct nfsd3_accessres *resp) |
284 | { | |
285 | p = nfs2svc_encode_fattr(rqstp, p, &resp->fh); | |
286 | *p++ = htonl(resp->access); | |
287 | return xdr_ressize_check(rqstp, p); | |
288 | } | |
289 | ||
290 | /* | |
291 | * XDR release functions | |
292 | */ | |
131a21c2 | 293 | static int nfsaclsvc_release_getacl(struct svc_rqst *rqstp, __be32 *p, |
a257cdd0 AG |
294 | struct nfsd3_getaclres *resp) |
295 | { | |
296 | fh_put(&resp->fh); | |
297 | posix_acl_release(resp->acl_access); | |
298 | posix_acl_release(resp->acl_default); | |
299 | return 1; | |
300 | } | |
301 | ||
c9ce2283 GB |
302 | static int nfsaclsvc_release_attrstat(struct svc_rqst *rqstp, __be32 *p, |
303 | struct nfsd_attrstat *resp) | |
a257cdd0 AG |
304 | { |
305 | fh_put(&resp->fh); | |
306 | return 1; | |
307 | } | |
308 | ||
c9ce2283 GB |
309 | static int nfsaclsvc_release_access(struct svc_rqst *rqstp, __be32 *p, |
310 | struct nfsd3_accessres *resp) | |
311 | { | |
312 | fh_put(&resp->fh); | |
313 | return 1; | |
314 | } | |
315 | ||
a257cdd0 | 316 | #define nfsaclsvc_decode_voidargs NULL |
a257cdd0 AG |
317 | #define nfsaclsvc_release_void NULL |
318 | #define nfsd3_fhandleargs nfsd_fhandle | |
319 | #define nfsd3_attrstatres nfsd_attrstat | |
320 | #define nfsd3_voidres nfsd3_voidargs | |
321 | struct nfsd3_voidargs { int dummy; }; | |
322 | ||
323 | #define PROC(name, argt, rest, relt, cache, respsize) \ | |
324 | { (svc_procfunc) nfsacld_proc_##name, \ | |
325 | (kxdrproc_t) nfsaclsvc_decode_##argt##args, \ | |
326 | (kxdrproc_t) nfsaclsvc_encode_##rest##res, \ | |
327 | (kxdrproc_t) nfsaclsvc_release_##relt, \ | |
328 | sizeof(struct nfsd3_##argt##args), \ | |
329 | sizeof(struct nfsd3_##rest##res), \ | |
330 | 0, \ | |
331 | cache, \ | |
332 | respsize, \ | |
333 | } | |
334 | ||
335 | #define ST 1 /* status*/ | |
336 | #define AT 21 /* attributes */ | |
337 | #define pAT (1+AT) /* post attributes - conditional */ | |
338 | #define ACL (1+NFS_ACL_MAX_ENTRIES*3) /* Access Control List */ | |
339 | ||
340 | static struct svc_procedure nfsd_acl_procedures2[] = { | |
341 | PROC(null, void, void, void, RC_NOCACHE, ST), | |
342 | PROC(getacl, getacl, getacl, getacl, RC_NOCACHE, ST+1+2*(1+ACL)), | |
c9ce2283 GB |
343 | PROC(setacl, setacl, attrstat, attrstat, RC_NOCACHE, ST+AT), |
344 | PROC(getattr, fhandle, attrstat, attrstat, RC_NOCACHE, ST+AT), | |
345 | PROC(access, access, access, access, RC_NOCACHE, ST+AT+1), | |
a257cdd0 AG |
346 | }; |
347 | ||
348 | struct svc_version nfsd_acl_version2 = { | |
349 | .vs_vers = 2, | |
350 | .vs_nproc = 5, | |
351 | .vs_proc = nfsd_acl_procedures2, | |
352 | .vs_dispatch = nfsd_dispatch, | |
353 | .vs_xdrsize = NFS3_SVC_XDRSIZE, | |
1b7e0403 | 354 | .vs_hidden = 0, |
a257cdd0 | 355 | }; |