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Commit | Line | Data |
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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> |
5a0e3ad6 | 10 | #include <linux/gfp.h> |
9a74af21 BH |
11 | #include "cache.h" |
12 | #include "xdr3.h" | |
0a3adade | 13 | #include "vfs.h" |
a257cdd0 AG |
14 | |
15 | #define NFSDDBG_FACILITY NFSDDBG_PROC | |
16 | #define RETURN_STATUS(st) { resp->status = (st); return (st); } | |
17 | ||
18 | /* | |
19 | * NULL call. | |
20 | */ | |
7111c66e | 21 | static __be32 |
a257cdd0 AG |
22 | nfsacld_proc_null(struct svc_rqst *rqstp, void *argp, void *resp) |
23 | { | |
24 | return nfs_ok; | |
25 | } | |
26 | ||
27 | /* | |
28 | * Get the Access and/or Default ACL of a file. | |
29 | */ | |
7111c66e | 30 | static __be32 nfsacld_proc_getacl(struct svc_rqst * rqstp, |
a257cdd0 AG |
31 | struct nfsd3_getaclargs *argp, struct nfsd3_getaclres *resp) |
32 | { | |
33 | svc_fh *fh; | |
34 | struct posix_acl *acl; | |
c4d987ba | 35 | __be32 nfserr = 0; |
a257cdd0 AG |
36 | |
37 | dprintk("nfsd: GETACL(2acl) %s\n", SVCFH_fmt(&argp->fh)); | |
38 | ||
39 | fh = fh_copy(&resp->fh, &argp->fh); | |
8837abca MS |
40 | nfserr = fh_verify(rqstp, &resp->fh, 0, NFSD_MAY_NOP); |
41 | if (nfserr) | |
ac8587dc | 42 | RETURN_STATUS(nfserr); |
a257cdd0 AG |
43 | |
44 | if (argp->mask & ~(NFS_ACL|NFS_ACLCNT|NFS_DFACL|NFS_DFACLCNT)) | |
45 | RETURN_STATUS(nfserr_inval); | |
46 | resp->mask = argp->mask; | |
47 | ||
4f4a4fad BF |
48 | nfserr = fh_getattr(fh, &resp->stat); |
49 | if (nfserr) | |
50 | goto fail; | |
51 | ||
a257cdd0 AG |
52 | if (resp->mask & (NFS_ACL|NFS_ACLCNT)) { |
53 | acl = nfsd_get_posix_acl(fh, ACL_TYPE_ACCESS); | |
54 | if (IS_ERR(acl)) { | |
55 | int err = PTR_ERR(acl); | |
56 | ||
57 | if (err == -ENODATA || err == -EOPNOTSUPP) | |
58 | acl = NULL; | |
59 | else { | |
60 | nfserr = nfserrno(err); | |
61 | goto fail; | |
62 | } | |
63 | } | |
64 | if (acl == NULL) { | |
65 | /* Solaris returns the inode's minimum ACL. */ | |
66 | ||
67 | struct inode *inode = fh->fh_dentry->d_inode; | |
68 | acl = posix_acl_from_mode(inode->i_mode, GFP_KERNEL); | |
69 | } | |
70 | resp->acl_access = acl; | |
71 | } | |
72 | if (resp->mask & (NFS_DFACL|NFS_DFACLCNT)) { | |
73 | /* Check how Solaris handles requests for the Default ACL | |
74 | of a non-directory! */ | |
75 | ||
76 | acl = nfsd_get_posix_acl(fh, ACL_TYPE_DEFAULT); | |
77 | if (IS_ERR(acl)) { | |
78 | int err = PTR_ERR(acl); | |
79 | ||
80 | if (err == -ENODATA || err == -EOPNOTSUPP) | |
81 | acl = NULL; | |
82 | else { | |
83 | nfserr = nfserrno(err); | |
84 | goto fail; | |
85 | } | |
86 | } | |
87 | resp->acl_default = acl; | |
88 | } | |
89 | ||
90 | /* resp->acl_{access,default} are released in nfssvc_release_getacl. */ | |
91 | RETURN_STATUS(0); | |
92 | ||
93 | fail: | |
94 | posix_acl_release(resp->acl_access); | |
95 | posix_acl_release(resp->acl_default); | |
96 | RETURN_STATUS(nfserr); | |
97 | } | |
98 | ||
99 | /* | |
100 | * Set the Access and/or Default ACL of a file. | |
101 | */ | |
7111c66e | 102 | static __be32 nfsacld_proc_setacl(struct svc_rqst * rqstp, |
a257cdd0 AG |
103 | struct nfsd3_setaclargs *argp, |
104 | struct nfsd_attrstat *resp) | |
105 | { | |
106 | svc_fh *fh; | |
c4d987ba | 107 | __be32 nfserr = 0; |
a257cdd0 AG |
108 | |
109 | dprintk("nfsd: SETACL(2acl) %s\n", SVCFH_fmt(&argp->fh)); | |
110 | ||
111 | fh = fh_copy(&resp->fh, &argp->fh); | |
8837abca | 112 | nfserr = fh_verify(rqstp, &resp->fh, 0, NFSD_MAY_SATTR); |
a257cdd0 AG |
113 | |
114 | if (!nfserr) { | |
115 | nfserr = nfserrno( nfsd_set_posix_acl( | |
116 | fh, ACL_TYPE_ACCESS, argp->acl_access) ); | |
117 | } | |
118 | if (!nfserr) { | |
119 | nfserr = nfserrno( nfsd_set_posix_acl( | |
120 | fh, ACL_TYPE_DEFAULT, argp->acl_default) ); | |
121 | } | |
4f4a4fad BF |
122 | if (!nfserr) { |
123 | nfserr = fh_getattr(fh, &resp->stat); | |
124 | } | |
a257cdd0 AG |
125 | |
126 | /* argp->acl_{access,default} may have been allocated in | |
127 | nfssvc_decode_setaclargs. */ | |
128 | posix_acl_release(argp->acl_access); | |
129 | posix_acl_release(argp->acl_default); | |
130 | return nfserr; | |
131 | } | |
132 | ||
133 | /* | |
134 | * Check file attributes | |
135 | */ | |
7111c66e | 136 | static __be32 nfsacld_proc_getattr(struct svc_rqst * rqstp, |
a257cdd0 AG |
137 | struct nfsd_fhandle *argp, struct nfsd_attrstat *resp) |
138 | { | |
4f4a4fad | 139 | __be32 nfserr; |
a257cdd0 AG |
140 | dprintk("nfsd: GETATTR %s\n", SVCFH_fmt(&argp->fh)); |
141 | ||
142 | fh_copy(&resp->fh, &argp->fh); | |
4f4a4fad BF |
143 | nfserr = fh_verify(rqstp, &resp->fh, 0, NFSD_MAY_NOP); |
144 | if (nfserr) | |
145 | return nfserr; | |
146 | nfserr = fh_getattr(&resp->fh, &resp->stat); | |
147 | return nfserr; | |
a257cdd0 AG |
148 | } |
149 | ||
150 | /* | |
151 | * Check file access | |
152 | */ | |
7111c66e | 153 | static __be32 nfsacld_proc_access(struct svc_rqst *rqstp, struct nfsd3_accessargs *argp, |
a257cdd0 AG |
154 | struct nfsd3_accessres *resp) |
155 | { | |
c4d987ba | 156 | __be32 nfserr; |
a257cdd0 AG |
157 | |
158 | dprintk("nfsd: ACCESS(2acl) %s 0x%x\n", | |
159 | SVCFH_fmt(&argp->fh), | |
160 | argp->access); | |
161 | ||
162 | fh_copy(&resp->fh, &argp->fh); | |
163 | resp->access = argp->access; | |
164 | nfserr = nfsd_access(rqstp, &resp->fh, &resp->access, NULL); | |
4f4a4fad BF |
165 | if (nfserr) |
166 | return nfserr; | |
167 | nfserr = fh_getattr(&resp->fh, &resp->stat); | |
a257cdd0 AG |
168 | return nfserr; |
169 | } | |
170 | ||
171 | /* | |
172 | * XDR decode functions | |
173 | */ | |
131a21c2 | 174 | static int nfsaclsvc_decode_getaclargs(struct svc_rqst *rqstp, __be32 *p, |
a257cdd0 AG |
175 | struct nfsd3_getaclargs *argp) |
176 | { | |
177 | if (!(p = nfs2svc_decode_fh(p, &argp->fh))) | |
178 | return 0; | |
179 | argp->mask = ntohl(*p); p++; | |
180 | ||
181 | return xdr_argsize_check(rqstp, p); | |
182 | } | |
183 | ||
184 | ||
131a21c2 | 185 | static int nfsaclsvc_decode_setaclargs(struct svc_rqst *rqstp, __be32 *p, |
a257cdd0 AG |
186 | struct nfsd3_setaclargs *argp) |
187 | { | |
188 | struct kvec *head = rqstp->rq_arg.head; | |
189 | unsigned int base; | |
190 | int n; | |
191 | ||
192 | if (!(p = nfs2svc_decode_fh(p, &argp->fh))) | |
193 | return 0; | |
194 | argp->mask = ntohl(*p++); | |
195 | if (argp->mask & ~(NFS_ACL|NFS_ACLCNT|NFS_DFACL|NFS_DFACLCNT) || | |
196 | !xdr_argsize_check(rqstp, p)) | |
197 | return 0; | |
198 | ||
199 | base = (char *)p - (char *)head->iov_base; | |
200 | n = nfsacl_decode(&rqstp->rq_arg, base, NULL, | |
201 | (argp->mask & NFS_ACL) ? | |
202 | &argp->acl_access : NULL); | |
203 | if (n > 0) | |
204 | n = nfsacl_decode(&rqstp->rq_arg, base + n, NULL, | |
205 | (argp->mask & NFS_DFACL) ? | |
206 | &argp->acl_default : NULL); | |
207 | return (n > 0); | |
208 | } | |
209 | ||
131a21c2 | 210 | static int nfsaclsvc_decode_fhandleargs(struct svc_rqst *rqstp, __be32 *p, |
a257cdd0 AG |
211 | struct nfsd_fhandle *argp) |
212 | { | |
213 | if (!(p = nfs2svc_decode_fh(p, &argp->fh))) | |
214 | return 0; | |
215 | return xdr_argsize_check(rqstp, p); | |
216 | } | |
217 | ||
131a21c2 | 218 | static int nfsaclsvc_decode_accessargs(struct svc_rqst *rqstp, __be32 *p, |
a257cdd0 AG |
219 | struct nfsd3_accessargs *argp) |
220 | { | |
221 | if (!(p = nfs2svc_decode_fh(p, &argp->fh))) | |
222 | return 0; | |
223 | argp->access = ntohl(*p++); | |
224 | ||
225 | return xdr_argsize_check(rqstp, p); | |
226 | } | |
227 | ||
228 | /* | |
229 | * XDR encode functions | |
230 | */ | |
231 | ||
1b7e0403 PS |
232 | /* |
233 | * There must be an encoding function for void results so svc_process | |
234 | * will work properly. | |
235 | */ | |
9c0b0ff7 | 236 | static int nfsaclsvc_encode_voidres(struct svc_rqst *rqstp, __be32 *p, void *dummy) |
1b7e0403 PS |
237 | { |
238 | return xdr_ressize_check(rqstp, p); | |
239 | } | |
240 | ||
a257cdd0 | 241 | /* GETACL */ |
131a21c2 | 242 | static int nfsaclsvc_encode_getaclres(struct svc_rqst *rqstp, __be32 *p, |
a257cdd0 AG |
243 | struct nfsd3_getaclres *resp) |
244 | { | |
245 | struct dentry *dentry = resp->fh.fh_dentry; | |
aefa89d1 | 246 | struct inode *inode; |
a257cdd0 AG |
247 | struct kvec *head = rqstp->rq_res.head; |
248 | unsigned int base; | |
249 | int n; | |
cb65a5ba | 250 | int w; |
a257cdd0 | 251 | |
aefa89d1 P |
252 | /* |
253 | * Since this is version 2, the check for nfserr in | |
254 | * nfsd_dispatch actually ensures the following cannot happen. | |
255 | * However, it seems fragile to depend on that. | |
256 | */ | |
a257cdd0 AG |
257 | if (dentry == NULL || dentry->d_inode == NULL) |
258 | return 0; | |
259 | inode = dentry->d_inode; | |
260 | ||
4f4a4fad | 261 | p = nfs2svc_encode_fattr(rqstp, p, &resp->fh, &resp->stat); |
a257cdd0 AG |
262 | *p++ = htonl(resp->mask); |
263 | if (!xdr_ressize_check(rqstp, p)) | |
264 | return 0; | |
265 | base = (char *)p - (char *)head->iov_base; | |
266 | ||
cb65a5ba JJ |
267 | rqstp->rq_res.page_len = w = nfsacl_size( |
268 | (resp->mask & NFS_ACL) ? resp->acl_access : NULL, | |
269 | (resp->mask & NFS_DFACL) ? resp->acl_default : NULL); | |
a257cdd0 | 270 | while (w > 0) { |
afc59400 | 271 | if (!*(rqstp->rq_next_page++)) |
a257cdd0 AG |
272 | return 0; |
273 | w -= PAGE_SIZE; | |
274 | } | |
275 | ||
276 | n = nfsacl_encode(&rqstp->rq_res, base, inode, | |
277 | resp->acl_access, | |
278 | resp->mask & NFS_ACL, 0); | |
279 | if (n > 0) | |
280 | n = nfsacl_encode(&rqstp->rq_res, base + n, inode, | |
281 | resp->acl_default, | |
282 | resp->mask & NFS_DFACL, | |
283 | NFS_ACL_DEFAULT); | |
284 | if (n <= 0) | |
285 | return 0; | |
286 | return 1; | |
287 | } | |
288 | ||
131a21c2 | 289 | static int nfsaclsvc_encode_attrstatres(struct svc_rqst *rqstp, __be32 *p, |
a257cdd0 AG |
290 | struct nfsd_attrstat *resp) |
291 | { | |
4f4a4fad | 292 | p = nfs2svc_encode_fattr(rqstp, p, &resp->fh, &resp->stat); |
a257cdd0 AG |
293 | return xdr_ressize_check(rqstp, p); |
294 | } | |
295 | ||
296 | /* ACCESS */ | |
131a21c2 | 297 | static int nfsaclsvc_encode_accessres(struct svc_rqst *rqstp, __be32 *p, |
a257cdd0 AG |
298 | struct nfsd3_accessres *resp) |
299 | { | |
4f4a4fad | 300 | p = nfs2svc_encode_fattr(rqstp, p, &resp->fh, &resp->stat); |
a257cdd0 AG |
301 | *p++ = htonl(resp->access); |
302 | return xdr_ressize_check(rqstp, p); | |
303 | } | |
304 | ||
305 | /* | |
306 | * XDR release functions | |
307 | */ | |
131a21c2 | 308 | static int nfsaclsvc_release_getacl(struct svc_rqst *rqstp, __be32 *p, |
a257cdd0 AG |
309 | struct nfsd3_getaclres *resp) |
310 | { | |
311 | fh_put(&resp->fh); | |
312 | posix_acl_release(resp->acl_access); | |
313 | posix_acl_release(resp->acl_default); | |
314 | return 1; | |
315 | } | |
316 | ||
c9ce2283 GB |
317 | static int nfsaclsvc_release_attrstat(struct svc_rqst *rqstp, __be32 *p, |
318 | struct nfsd_attrstat *resp) | |
a257cdd0 AG |
319 | { |
320 | fh_put(&resp->fh); | |
321 | return 1; | |
322 | } | |
323 | ||
c9ce2283 GB |
324 | static int nfsaclsvc_release_access(struct svc_rqst *rqstp, __be32 *p, |
325 | struct nfsd3_accessres *resp) | |
326 | { | |
327 | fh_put(&resp->fh); | |
328 | return 1; | |
329 | } | |
330 | ||
a257cdd0 | 331 | #define nfsaclsvc_decode_voidargs NULL |
a257cdd0 AG |
332 | #define nfsaclsvc_release_void NULL |
333 | #define nfsd3_fhandleargs nfsd_fhandle | |
334 | #define nfsd3_attrstatres nfsd_attrstat | |
335 | #define nfsd3_voidres nfsd3_voidargs | |
336 | struct nfsd3_voidargs { int dummy; }; | |
337 | ||
338 | #define PROC(name, argt, rest, relt, cache, respsize) \ | |
339 | { (svc_procfunc) nfsacld_proc_##name, \ | |
340 | (kxdrproc_t) nfsaclsvc_decode_##argt##args, \ | |
341 | (kxdrproc_t) nfsaclsvc_encode_##rest##res, \ | |
342 | (kxdrproc_t) nfsaclsvc_release_##relt, \ | |
343 | sizeof(struct nfsd3_##argt##args), \ | |
344 | sizeof(struct nfsd3_##rest##res), \ | |
345 | 0, \ | |
346 | cache, \ | |
347 | respsize, \ | |
348 | } | |
349 | ||
350 | #define ST 1 /* status*/ | |
351 | #define AT 21 /* attributes */ | |
352 | #define pAT (1+AT) /* post attributes - conditional */ | |
353 | #define ACL (1+NFS_ACL_MAX_ENTRIES*3) /* Access Control List */ | |
354 | ||
355 | static struct svc_procedure nfsd_acl_procedures2[] = { | |
356 | PROC(null, void, void, void, RC_NOCACHE, ST), | |
357 | PROC(getacl, getacl, getacl, getacl, RC_NOCACHE, ST+1+2*(1+ACL)), | |
c9ce2283 GB |
358 | PROC(setacl, setacl, attrstat, attrstat, RC_NOCACHE, ST+AT), |
359 | PROC(getattr, fhandle, attrstat, attrstat, RC_NOCACHE, ST+AT), | |
360 | PROC(access, access, access, access, RC_NOCACHE, ST+AT+1), | |
a257cdd0 AG |
361 | }; |
362 | ||
363 | struct svc_version nfsd_acl_version2 = { | |
364 | .vs_vers = 2, | |
365 | .vs_nproc = 5, | |
366 | .vs_proc = nfsd_acl_procedures2, | |
367 | .vs_dispatch = nfsd_dispatch, | |
368 | .vs_xdrsize = NFS3_SVC_XDRSIZE, | |
1b7e0403 | 369 | .vs_hidden = 0, |
a257cdd0 | 370 | }; |