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> |
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 | ||
48 | if (resp->mask & (NFS_ACL|NFS_ACLCNT)) { | |
49 | acl = nfsd_get_posix_acl(fh, ACL_TYPE_ACCESS); | |
50 | if (IS_ERR(acl)) { | |
51 | int err = PTR_ERR(acl); | |
52 | ||
53 | if (err == -ENODATA || err == -EOPNOTSUPP) | |
54 | acl = NULL; | |
55 | else { | |
56 | nfserr = nfserrno(err); | |
57 | goto fail; | |
58 | } | |
59 | } | |
60 | if (acl == NULL) { | |
61 | /* Solaris returns the inode's minimum ACL. */ | |
62 | ||
63 | struct inode *inode = fh->fh_dentry->d_inode; | |
64 | acl = posix_acl_from_mode(inode->i_mode, GFP_KERNEL); | |
65 | } | |
66 | resp->acl_access = acl; | |
67 | } | |
68 | if (resp->mask & (NFS_DFACL|NFS_DFACLCNT)) { | |
69 | /* Check how Solaris handles requests for the Default ACL | |
70 | of a non-directory! */ | |
71 | ||
72 | acl = nfsd_get_posix_acl(fh, ACL_TYPE_DEFAULT); | |
73 | if (IS_ERR(acl)) { | |
74 | int err = PTR_ERR(acl); | |
75 | ||
76 | if (err == -ENODATA || err == -EOPNOTSUPP) | |
77 | acl = NULL; | |
78 | else { | |
79 | nfserr = nfserrno(err); | |
80 | goto fail; | |
81 | } | |
82 | } | |
83 | resp->acl_default = acl; | |
84 | } | |
85 | ||
86 | /* resp->acl_{access,default} are released in nfssvc_release_getacl. */ | |
87 | RETURN_STATUS(0); | |
88 | ||
89 | fail: | |
90 | posix_acl_release(resp->acl_access); | |
91 | posix_acl_release(resp->acl_default); | |
92 | RETURN_STATUS(nfserr); | |
93 | } | |
94 | ||
95 | /* | |
96 | * Set the Access and/or Default ACL of a file. | |
97 | */ | |
7111c66e | 98 | static __be32 nfsacld_proc_setacl(struct svc_rqst * rqstp, |
a257cdd0 AG |
99 | struct nfsd3_setaclargs *argp, |
100 | struct nfsd_attrstat *resp) | |
101 | { | |
102 | svc_fh *fh; | |
c4d987ba | 103 | __be32 nfserr = 0; |
a257cdd0 AG |
104 | |
105 | dprintk("nfsd: SETACL(2acl) %s\n", SVCFH_fmt(&argp->fh)); | |
106 | ||
107 | fh = fh_copy(&resp->fh, &argp->fh); | |
8837abca | 108 | nfserr = fh_verify(rqstp, &resp->fh, 0, NFSD_MAY_SATTR); |
a257cdd0 AG |
109 | |
110 | if (!nfserr) { | |
111 | nfserr = nfserrno( nfsd_set_posix_acl( | |
112 | fh, ACL_TYPE_ACCESS, argp->acl_access) ); | |
113 | } | |
114 | if (!nfserr) { | |
115 | nfserr = nfserrno( nfsd_set_posix_acl( | |
116 | fh, ACL_TYPE_DEFAULT, argp->acl_default) ); | |
117 | } | |
118 | ||
119 | /* argp->acl_{access,default} may have been allocated in | |
120 | nfssvc_decode_setaclargs. */ | |
121 | posix_acl_release(argp->acl_access); | |
122 | posix_acl_release(argp->acl_default); | |
123 | return nfserr; | |
124 | } | |
125 | ||
126 | /* | |
127 | * Check file attributes | |
128 | */ | |
7111c66e | 129 | static __be32 nfsacld_proc_getattr(struct svc_rqst * rqstp, |
a257cdd0 AG |
130 | struct nfsd_fhandle *argp, struct nfsd_attrstat *resp) |
131 | { | |
132 | dprintk("nfsd: GETATTR %s\n", SVCFH_fmt(&argp->fh)); | |
133 | ||
134 | fh_copy(&resp->fh, &argp->fh); | |
8837abca | 135 | return fh_verify(rqstp, &resp->fh, 0, NFSD_MAY_NOP); |
a257cdd0 AG |
136 | } |
137 | ||
138 | /* | |
139 | * Check file access | |
140 | */ | |
7111c66e | 141 | static __be32 nfsacld_proc_access(struct svc_rqst *rqstp, struct nfsd3_accessargs *argp, |
a257cdd0 AG |
142 | struct nfsd3_accessres *resp) |
143 | { | |
c4d987ba | 144 | __be32 nfserr; |
a257cdd0 AG |
145 | |
146 | dprintk("nfsd: ACCESS(2acl) %s 0x%x\n", | |
147 | SVCFH_fmt(&argp->fh), | |
148 | argp->access); | |
149 | ||
150 | fh_copy(&resp->fh, &argp->fh); | |
151 | resp->access = argp->access; | |
152 | nfserr = nfsd_access(rqstp, &resp->fh, &resp->access, NULL); | |
153 | return nfserr; | |
154 | } | |
155 | ||
156 | /* | |
157 | * XDR decode functions | |
158 | */ | |
131a21c2 | 159 | static int nfsaclsvc_decode_getaclargs(struct svc_rqst *rqstp, __be32 *p, |
a257cdd0 AG |
160 | struct nfsd3_getaclargs *argp) |
161 | { | |
162 | if (!(p = nfs2svc_decode_fh(p, &argp->fh))) | |
163 | return 0; | |
164 | argp->mask = ntohl(*p); p++; | |
165 | ||
166 | return xdr_argsize_check(rqstp, p); | |
167 | } | |
168 | ||
169 | ||
131a21c2 | 170 | static int nfsaclsvc_decode_setaclargs(struct svc_rqst *rqstp, __be32 *p, |
a257cdd0 AG |
171 | struct nfsd3_setaclargs *argp) |
172 | { | |
173 | struct kvec *head = rqstp->rq_arg.head; | |
174 | unsigned int base; | |
175 | int n; | |
176 | ||
177 | if (!(p = nfs2svc_decode_fh(p, &argp->fh))) | |
178 | return 0; | |
179 | argp->mask = ntohl(*p++); | |
180 | if (argp->mask & ~(NFS_ACL|NFS_ACLCNT|NFS_DFACL|NFS_DFACLCNT) || | |
181 | !xdr_argsize_check(rqstp, p)) | |
182 | return 0; | |
183 | ||
184 | base = (char *)p - (char *)head->iov_base; | |
185 | n = nfsacl_decode(&rqstp->rq_arg, base, NULL, | |
186 | (argp->mask & NFS_ACL) ? | |
187 | &argp->acl_access : NULL); | |
188 | if (n > 0) | |
189 | n = nfsacl_decode(&rqstp->rq_arg, base + n, NULL, | |
190 | (argp->mask & NFS_DFACL) ? | |
191 | &argp->acl_default : NULL); | |
192 | return (n > 0); | |
193 | } | |
194 | ||
131a21c2 | 195 | static int nfsaclsvc_decode_fhandleargs(struct svc_rqst *rqstp, __be32 *p, |
a257cdd0 AG |
196 | struct nfsd_fhandle *argp) |
197 | { | |
198 | if (!(p = nfs2svc_decode_fh(p, &argp->fh))) | |
199 | return 0; | |
200 | return xdr_argsize_check(rqstp, p); | |
201 | } | |
202 | ||
131a21c2 | 203 | static int nfsaclsvc_decode_accessargs(struct svc_rqst *rqstp, __be32 *p, |
a257cdd0 AG |
204 | struct nfsd3_accessargs *argp) |
205 | { | |
206 | if (!(p = nfs2svc_decode_fh(p, &argp->fh))) | |
207 | return 0; | |
208 | argp->access = ntohl(*p++); | |
209 | ||
210 | return xdr_argsize_check(rqstp, p); | |
211 | } | |
212 | ||
213 | /* | |
214 | * XDR encode functions | |
215 | */ | |
216 | ||
1b7e0403 PS |
217 | /* |
218 | * There must be an encoding function for void results so svc_process | |
219 | * will work properly. | |
220 | */ | |
221 | int | |
222 | nfsaclsvc_encode_voidres(struct svc_rqst *rqstp, __be32 *p, void *dummy) | |
223 | { | |
224 | return xdr_ressize_check(rqstp, p); | |
225 | } | |
226 | ||
a257cdd0 | 227 | /* GETACL */ |
131a21c2 | 228 | static int nfsaclsvc_encode_getaclres(struct svc_rqst *rqstp, __be32 *p, |
a257cdd0 AG |
229 | struct nfsd3_getaclres *resp) |
230 | { | |
231 | struct dentry *dentry = resp->fh.fh_dentry; | |
aefa89d1 | 232 | struct inode *inode; |
a257cdd0 AG |
233 | struct kvec *head = rqstp->rq_res.head; |
234 | unsigned int base; | |
235 | int n; | |
cb65a5ba | 236 | int w; |
a257cdd0 | 237 | |
aefa89d1 P |
238 | /* |
239 | * Since this is version 2, the check for nfserr in | |
240 | * nfsd_dispatch actually ensures the following cannot happen. | |
241 | * However, it seems fragile to depend on that. | |
242 | */ | |
a257cdd0 AG |
243 | if (dentry == NULL || dentry->d_inode == NULL) |
244 | return 0; | |
245 | inode = dentry->d_inode; | |
246 | ||
247 | p = nfs2svc_encode_fattr(rqstp, p, &resp->fh); | |
248 | *p++ = htonl(resp->mask); | |
249 | if (!xdr_ressize_check(rqstp, p)) | |
250 | return 0; | |
251 | base = (char *)p - (char *)head->iov_base; | |
252 | ||
cb65a5ba JJ |
253 | rqstp->rq_res.page_len = w = nfsacl_size( |
254 | (resp->mask & NFS_ACL) ? resp->acl_access : NULL, | |
255 | (resp->mask & NFS_DFACL) ? resp->acl_default : NULL); | |
a257cdd0 | 256 | while (w > 0) { |
44524359 | 257 | if (!rqstp->rq_respages[rqstp->rq_resused++]) |
a257cdd0 AG |
258 | return 0; |
259 | w -= PAGE_SIZE; | |
260 | } | |
261 | ||
262 | n = nfsacl_encode(&rqstp->rq_res, base, inode, | |
263 | resp->acl_access, | |
264 | resp->mask & NFS_ACL, 0); | |
265 | if (n > 0) | |
266 | n = nfsacl_encode(&rqstp->rq_res, base + n, inode, | |
267 | resp->acl_default, | |
268 | resp->mask & NFS_DFACL, | |
269 | NFS_ACL_DEFAULT); | |
270 | if (n <= 0) | |
271 | return 0; | |
272 | return 1; | |
273 | } | |
274 | ||
131a21c2 | 275 | static int nfsaclsvc_encode_attrstatres(struct svc_rqst *rqstp, __be32 *p, |
a257cdd0 AG |
276 | struct nfsd_attrstat *resp) |
277 | { | |
278 | p = nfs2svc_encode_fattr(rqstp, p, &resp->fh); | |
279 | return xdr_ressize_check(rqstp, p); | |
280 | } | |
281 | ||
282 | /* ACCESS */ | |
131a21c2 | 283 | static int nfsaclsvc_encode_accessres(struct svc_rqst *rqstp, __be32 *p, |
a257cdd0 AG |
284 | struct nfsd3_accessres *resp) |
285 | { | |
286 | p = nfs2svc_encode_fattr(rqstp, p, &resp->fh); | |
287 | *p++ = htonl(resp->access); | |
288 | return xdr_ressize_check(rqstp, p); | |
289 | } | |
290 | ||
291 | /* | |
292 | * XDR release functions | |
293 | */ | |
131a21c2 | 294 | static int nfsaclsvc_release_getacl(struct svc_rqst *rqstp, __be32 *p, |
a257cdd0 AG |
295 | struct nfsd3_getaclres *resp) |
296 | { | |
297 | fh_put(&resp->fh); | |
298 | posix_acl_release(resp->acl_access); | |
299 | posix_acl_release(resp->acl_default); | |
300 | return 1; | |
301 | } | |
302 | ||
c9ce2283 GB |
303 | static int nfsaclsvc_release_attrstat(struct svc_rqst *rqstp, __be32 *p, |
304 | struct nfsd_attrstat *resp) | |
a257cdd0 AG |
305 | { |
306 | fh_put(&resp->fh); | |
307 | return 1; | |
308 | } | |
309 | ||
c9ce2283 GB |
310 | static int nfsaclsvc_release_access(struct svc_rqst *rqstp, __be32 *p, |
311 | struct nfsd3_accessres *resp) | |
312 | { | |
313 | fh_put(&resp->fh); | |
314 | return 1; | |
315 | } | |
316 | ||
a257cdd0 | 317 | #define nfsaclsvc_decode_voidargs NULL |
a257cdd0 AG |
318 | #define nfsaclsvc_release_void NULL |
319 | #define nfsd3_fhandleargs nfsd_fhandle | |
320 | #define nfsd3_attrstatres nfsd_attrstat | |
321 | #define nfsd3_voidres nfsd3_voidargs | |
322 | struct nfsd3_voidargs { int dummy; }; | |
323 | ||
324 | #define PROC(name, argt, rest, relt, cache, respsize) \ | |
325 | { (svc_procfunc) nfsacld_proc_##name, \ | |
326 | (kxdrproc_t) nfsaclsvc_decode_##argt##args, \ | |
327 | (kxdrproc_t) nfsaclsvc_encode_##rest##res, \ | |
328 | (kxdrproc_t) nfsaclsvc_release_##relt, \ | |
329 | sizeof(struct nfsd3_##argt##args), \ | |
330 | sizeof(struct nfsd3_##rest##res), \ | |
331 | 0, \ | |
332 | cache, \ | |
333 | respsize, \ | |
334 | } | |
335 | ||
336 | #define ST 1 /* status*/ | |
337 | #define AT 21 /* attributes */ | |
338 | #define pAT (1+AT) /* post attributes - conditional */ | |
339 | #define ACL (1+NFS_ACL_MAX_ENTRIES*3) /* Access Control List */ | |
340 | ||
341 | static struct svc_procedure nfsd_acl_procedures2[] = { | |
342 | PROC(null, void, void, void, RC_NOCACHE, ST), | |
343 | PROC(getacl, getacl, getacl, getacl, RC_NOCACHE, ST+1+2*(1+ACL)), | |
c9ce2283 GB |
344 | PROC(setacl, setacl, attrstat, attrstat, RC_NOCACHE, ST+AT), |
345 | PROC(getattr, fhandle, attrstat, attrstat, RC_NOCACHE, ST+AT), | |
346 | PROC(access, access, access, access, RC_NOCACHE, ST+AT+1), | |
a257cdd0 AG |
347 | }; |
348 | ||
349 | struct svc_version nfsd_acl_version2 = { | |
350 | .vs_vers = 2, | |
351 | .vs_nproc = 5, | |
352 | .vs_proc = nfsd_acl_procedures2, | |
353 | .vs_dispatch = nfsd_dispatch, | |
354 | .vs_xdrsize = NFS3_SVC_XDRSIZE, | |
1b7e0403 | 355 | .vs_hidden = 0, |
a257cdd0 | 356 | }; |