Commit | Line | Data |
---|---|---|
a257cdd0 | 1 | /* |
f30c2269 | 2 | * linux/fs/nfsd/nfs2acl.c |
a257cdd0 AG |
3 | * |
4 | * Process version 2 NFSACL requests. | |
5 | * | |
6 | * Copyright (C) 2002-2003 Andreas Gruenbacher <agruen@suse.de> | |
7 | */ | |
8 | ||
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 | * NULL call. | |
23 | */ | |
7111c66e | 24 | static __be32 |
a257cdd0 AG |
25 | nfsacld_proc_null(struct svc_rqst *rqstp, void *argp, void *resp) |
26 | { | |
27 | return nfs_ok; | |
28 | } | |
29 | ||
30 | /* | |
31 | * Get the Access and/or Default ACL of a file. | |
32 | */ | |
7111c66e | 33 | static __be32 nfsacld_proc_getacl(struct svc_rqst * rqstp, |
a257cdd0 AG |
34 | struct nfsd3_getaclargs *argp, struct nfsd3_getaclres *resp) |
35 | { | |
36 | svc_fh *fh; | |
37 | struct posix_acl *acl; | |
c4d987ba | 38 | __be32 nfserr = 0; |
a257cdd0 AG |
39 | |
40 | dprintk("nfsd: GETACL(2acl) %s\n", SVCFH_fmt(&argp->fh)); | |
41 | ||
42 | fh = fh_copy(&resp->fh, &argp->fh); | |
8837abca MS |
43 | nfserr = fh_verify(rqstp, &resp->fh, 0, NFSD_MAY_NOP); |
44 | if (nfserr) | |
ac8587dc | 45 | RETURN_STATUS(nfserr); |
a257cdd0 AG |
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 | /* Solaris returns the inode's minimum ACL. */ | |
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 | /* Check how Solaris handles requests for the Default ACL | |
73 | of a non-directory! */ | |
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 | /* resp->acl_{access,default} are released in nfssvc_release_getacl. */ | |
90 | RETURN_STATUS(0); | |
91 | ||
92 | fail: | |
93 | posix_acl_release(resp->acl_access); | |
94 | posix_acl_release(resp->acl_default); | |
95 | RETURN_STATUS(nfserr); | |
96 | } | |
97 | ||
98 | /* | |
99 | * Set the Access and/or Default ACL of a file. | |
100 | */ | |
7111c66e | 101 | static __be32 nfsacld_proc_setacl(struct svc_rqst * rqstp, |
a257cdd0 AG |
102 | struct nfsd3_setaclargs *argp, |
103 | struct nfsd_attrstat *resp) | |
104 | { | |
105 | svc_fh *fh; | |
c4d987ba | 106 | __be32 nfserr = 0; |
a257cdd0 AG |
107 | |
108 | dprintk("nfsd: SETACL(2acl) %s\n", SVCFH_fmt(&argp->fh)); | |
109 | ||
110 | fh = fh_copy(&resp->fh, &argp->fh); | |
8837abca | 111 | nfserr = fh_verify(rqstp, &resp->fh, 0, NFSD_MAY_SATTR); |
a257cdd0 AG |
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 | /* argp->acl_{access,default} may have been allocated in | |
123 | nfssvc_decode_setaclargs. */ | |
124 | posix_acl_release(argp->acl_access); | |
125 | posix_acl_release(argp->acl_default); | |
126 | return nfserr; | |
127 | } | |
128 | ||
129 | /* | |
130 | * Check file attributes | |
131 | */ | |
7111c66e | 132 | static __be32 nfsacld_proc_getattr(struct svc_rqst * rqstp, |
a257cdd0 AG |
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); | |
8837abca | 138 | return fh_verify(rqstp, &resp->fh, 0, NFSD_MAY_NOP); |
a257cdd0 AG |
139 | } |
140 | ||
141 | /* | |
142 | * Check file access | |
143 | */ | |
7111c66e | 144 | static __be32 nfsacld_proc_access(struct svc_rqst *rqstp, struct nfsd3_accessargs *argp, |
a257cdd0 AG |
145 | struct nfsd3_accessres *resp) |
146 | { | |
c4d987ba | 147 | __be32 nfserr; |
a257cdd0 AG |
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 | * XDR decode functions | |
161 | */ | |
131a21c2 | 162 | static int nfsaclsvc_decode_getaclargs(struct svc_rqst *rqstp, __be32 *p, |
a257cdd0 AG |
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 | ||
131a21c2 | 173 | static int nfsaclsvc_decode_setaclargs(struct svc_rqst *rqstp, __be32 *p, |
a257cdd0 AG |
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 | ||
131a21c2 | 198 | static int nfsaclsvc_decode_fhandleargs(struct svc_rqst *rqstp, __be32 *p, |
a257cdd0 AG |
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 | ||
131a21c2 | 206 | static int nfsaclsvc_decode_accessargs(struct svc_rqst *rqstp, __be32 *p, |
a257cdd0 AG |
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 | * XDR encode functions | |
218 | */ | |
219 | ||
220 | /* GETACL */ | |
131a21c2 | 221 | static int nfsaclsvc_encode_getaclres(struct svc_rqst *rqstp, __be32 *p, |
a257cdd0 AG |
222 | struct nfsd3_getaclres *resp) |
223 | { | |
224 | struct dentry *dentry = resp->fh.fh_dentry; | |
aefa89d1 | 225 | struct inode *inode; |
a257cdd0 AG |
226 | struct kvec *head = rqstp->rq_res.head; |
227 | unsigned int base; | |
228 | int n; | |
cb65a5ba | 229 | int w; |
a257cdd0 | 230 | |
aefa89d1 P |
231 | /* |
232 | * Since this is version 2, the check for nfserr in | |
233 | * nfsd_dispatch actually ensures the following cannot happen. | |
234 | * However, it seems fragile to depend on that. | |
235 | */ | |
a257cdd0 AG |
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 | ||
cb65a5ba JJ |
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); | |
a257cdd0 | 249 | while (w > 0) { |
44524359 | 250 | if (!rqstp->rq_respages[rqstp->rq_resused++]) |
a257cdd0 AG |
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 | ||
131a21c2 | 268 | static int nfsaclsvc_encode_attrstatres(struct svc_rqst *rqstp, __be32 *p, |
a257cdd0 AG |
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 | /* ACCESS */ | |
131a21c2 | 276 | static int nfsaclsvc_encode_accessres(struct svc_rqst *rqstp, __be32 *p, |
a257cdd0 AG |
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 | * XDR release functions | |
286 | */ | |
131a21c2 | 287 | static int nfsaclsvc_release_getacl(struct svc_rqst *rqstp, __be32 *p, |
a257cdd0 AG |
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 | ||
c9ce2283 GB |
296 | static int nfsaclsvc_release_attrstat(struct svc_rqst *rqstp, __be32 *p, |
297 | struct nfsd_attrstat *resp) | |
a257cdd0 AG |
298 | { |
299 | fh_put(&resp->fh); | |
300 | return 1; | |
301 | } | |
302 | ||
c9ce2283 GB |
303 | static 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 | ||
a257cdd0 AG |
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 | |
316 | struct 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 /* status*/ | |
331 | #define AT 21 /* attributes */ | |
332 | #define pAT (1+AT) /* post attributes - conditional */ | |
333 | #define ACL (1+NFS_ACL_MAX_ENTRIES*3) /* Access Control List */ | |
334 | ||
335 | static 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)), | |
c9ce2283 GB |
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), | |
a257cdd0 AG |
341 | }; |
342 | ||
343 | struct 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, | |
bc5fea42 | 349 | .vs_hidden = 1, |
a257cdd0 | 350 | }; |