2 * linux/fs/nfsd/nfs2acl.c
4 * Process version 2 NFSACL requests.
6 * Copyright (C) 2002-2003 Andreas Gruenbacher <agruen@suse.de>
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>
18 #define NFSDDBG_FACILITY NFSDDBG_PROC
19 #define RETURN_STATUS(st) { resp->status = (st); return (st); }
25 nfsacld_proc_null(struct svc_rqst
*rqstp
, void *argp
, void *resp
)
31 * Get the Access and/or Default ACL of a file.
33 static __be32
nfsacld_proc_getacl(struct svc_rqst
* rqstp
,
34 struct nfsd3_getaclargs
*argp
, struct nfsd3_getaclres
*resp
)
37 struct posix_acl
*acl
;
40 dprintk("nfsd: GETACL(2acl) %s\n", SVCFH_fmt(&argp
->fh
));
42 fh
= fh_copy(&resp
->fh
, &argp
->fh
);
43 nfserr
= fh_verify(rqstp
, &resp
->fh
, 0, NFSD_MAY_NOP
);
45 RETURN_STATUS(nfserr
);
47 if (argp
->mask
& ~(NFS_ACL
|NFS_ACLCNT
|NFS_DFACL
|NFS_DFACLCNT
))
48 RETURN_STATUS(nfserr_inval
);
49 resp
->mask
= argp
->mask
;
51 if (resp
->mask
& (NFS_ACL
|NFS_ACLCNT
)) {
52 acl
= nfsd_get_posix_acl(fh
, ACL_TYPE_ACCESS
);
54 int err
= PTR_ERR(acl
);
56 if (err
== -ENODATA
|| err
== -EOPNOTSUPP
)
59 nfserr
= nfserrno(err
);
64 /* Solaris returns the inode's minimum ACL. */
66 struct inode
*inode
= fh
->fh_dentry
->d_inode
;
67 acl
= posix_acl_from_mode(inode
->i_mode
, GFP_KERNEL
);
69 resp
->acl_access
= acl
;
71 if (resp
->mask
& (NFS_DFACL
|NFS_DFACLCNT
)) {
72 /* Check how Solaris handles requests for the Default ACL
73 of a non-directory! */
75 acl
= nfsd_get_posix_acl(fh
, ACL_TYPE_DEFAULT
);
77 int err
= PTR_ERR(acl
);
79 if (err
== -ENODATA
|| err
== -EOPNOTSUPP
)
82 nfserr
= nfserrno(err
);
86 resp
->acl_default
= acl
;
89 /* resp->acl_{access,default} are released in nfssvc_release_getacl. */
93 posix_acl_release(resp
->acl_access
);
94 posix_acl_release(resp
->acl_default
);
95 RETURN_STATUS(nfserr
);
99 * Set the Access and/or Default ACL of a file.
101 static __be32
nfsacld_proc_setacl(struct svc_rqst
* rqstp
,
102 struct nfsd3_setaclargs
*argp
,
103 struct nfsd_attrstat
*resp
)
108 dprintk("nfsd: SETACL(2acl) %s\n", SVCFH_fmt(&argp
->fh
));
110 fh
= fh_copy(&resp
->fh
, &argp
->fh
);
111 nfserr
= fh_verify(rqstp
, &resp
->fh
, 0, NFSD_MAY_SATTR
);
114 nfserr
= nfserrno( nfsd_set_posix_acl(
115 fh
, ACL_TYPE_ACCESS
, argp
->acl_access
) );
118 nfserr
= nfserrno( nfsd_set_posix_acl(
119 fh
, ACL_TYPE_DEFAULT
, argp
->acl_default
) );
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
);
130 * Check file attributes
132 static __be32
nfsacld_proc_getattr(struct svc_rqst
* rqstp
,
133 struct nfsd_fhandle
*argp
, struct nfsd_attrstat
*resp
)
135 dprintk("nfsd: GETATTR %s\n", SVCFH_fmt(&argp
->fh
));
137 fh_copy(&resp
->fh
, &argp
->fh
);
138 return fh_verify(rqstp
, &resp
->fh
, 0, NFSD_MAY_NOP
);
144 static __be32
nfsacld_proc_access(struct svc_rqst
*rqstp
, struct nfsd3_accessargs
*argp
,
145 struct nfsd3_accessres
*resp
)
149 dprintk("nfsd: ACCESS(2acl) %s 0x%x\n",
150 SVCFH_fmt(&argp
->fh
),
153 fh_copy(&resp
->fh
, &argp
->fh
);
154 resp
->access
= argp
->access
;
155 nfserr
= nfsd_access(rqstp
, &resp
->fh
, &resp
->access
, NULL
);
160 * XDR decode functions
162 static int nfsaclsvc_decode_getaclargs(struct svc_rqst
*rqstp
, __be32
*p
,
163 struct nfsd3_getaclargs
*argp
)
165 if (!(p
= nfs2svc_decode_fh(p
, &argp
->fh
)))
167 argp
->mask
= ntohl(*p
); p
++;
169 return xdr_argsize_check(rqstp
, p
);
173 static int nfsaclsvc_decode_setaclargs(struct svc_rqst
*rqstp
, __be32
*p
,
174 struct nfsd3_setaclargs
*argp
)
176 struct kvec
*head
= rqstp
->rq_arg
.head
;
180 if (!(p
= nfs2svc_decode_fh(p
, &argp
->fh
)))
182 argp
->mask
= ntohl(*p
++);
183 if (argp
->mask
& ~(NFS_ACL
|NFS_ACLCNT
|NFS_DFACL
|NFS_DFACLCNT
) ||
184 !xdr_argsize_check(rqstp
, p
))
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
);
192 n
= nfsacl_decode(&rqstp
->rq_arg
, base
+ n
, NULL
,
193 (argp
->mask
& NFS_DFACL
) ?
194 &argp
->acl_default
: NULL
);
198 static int nfsaclsvc_decode_fhandleargs(struct svc_rqst
*rqstp
, __be32
*p
,
199 struct nfsd_fhandle
*argp
)
201 if (!(p
= nfs2svc_decode_fh(p
, &argp
->fh
)))
203 return xdr_argsize_check(rqstp
, p
);
206 static int nfsaclsvc_decode_accessargs(struct svc_rqst
*rqstp
, __be32
*p
,
207 struct nfsd3_accessargs
*argp
)
209 if (!(p
= nfs2svc_decode_fh(p
, &argp
->fh
)))
211 argp
->access
= ntohl(*p
++);
213 return xdr_argsize_check(rqstp
, p
);
217 * XDR encode functions
221 * There must be an encoding function for void results so svc_process
222 * will work properly.
225 nfsaclsvc_encode_voidres(struct svc_rqst
*rqstp
, __be32
*p
, void *dummy
)
227 return xdr_ressize_check(rqstp
, p
);
231 static int nfsaclsvc_encode_getaclres(struct svc_rqst
*rqstp
, __be32
*p
,
232 struct nfsd3_getaclres
*resp
)
234 struct dentry
*dentry
= resp
->fh
.fh_dentry
;
236 struct kvec
*head
= rqstp
->rq_res
.head
;
242 * Since this is version 2, the check for nfserr in
243 * nfsd_dispatch actually ensures the following cannot happen.
244 * However, it seems fragile to depend on that.
246 if (dentry
== NULL
|| dentry
->d_inode
== NULL
)
248 inode
= dentry
->d_inode
;
250 p
= nfs2svc_encode_fattr(rqstp
, p
, &resp
->fh
);
251 *p
++ = htonl(resp
->mask
);
252 if (!xdr_ressize_check(rqstp
, p
))
254 base
= (char *)p
- (char *)head
->iov_base
;
256 rqstp
->rq_res
.page_len
= w
= nfsacl_size(
257 (resp
->mask
& NFS_ACL
) ? resp
->acl_access
: NULL
,
258 (resp
->mask
& NFS_DFACL
) ? resp
->acl_default
: NULL
);
260 if (!rqstp
->rq_respages
[rqstp
->rq_resused
++])
265 n
= nfsacl_encode(&rqstp
->rq_res
, base
, inode
,
267 resp
->mask
& NFS_ACL
, 0);
269 n
= nfsacl_encode(&rqstp
->rq_res
, base
+ n
, inode
,
271 resp
->mask
& NFS_DFACL
,
278 static int nfsaclsvc_encode_attrstatres(struct svc_rqst
*rqstp
, __be32
*p
,
279 struct nfsd_attrstat
*resp
)
281 p
= nfs2svc_encode_fattr(rqstp
, p
, &resp
->fh
);
282 return xdr_ressize_check(rqstp
, p
);
286 static int nfsaclsvc_encode_accessres(struct svc_rqst
*rqstp
, __be32
*p
,
287 struct nfsd3_accessres
*resp
)
289 p
= nfs2svc_encode_fattr(rqstp
, p
, &resp
->fh
);
290 *p
++ = htonl(resp
->access
);
291 return xdr_ressize_check(rqstp
, p
);
295 * XDR release functions
297 static int nfsaclsvc_release_getacl(struct svc_rqst
*rqstp
, __be32
*p
,
298 struct nfsd3_getaclres
*resp
)
301 posix_acl_release(resp
->acl_access
);
302 posix_acl_release(resp
->acl_default
);
306 static int nfsaclsvc_release_attrstat(struct svc_rqst
*rqstp
, __be32
*p
,
307 struct nfsd_attrstat
*resp
)
313 static int nfsaclsvc_release_access(struct svc_rqst
*rqstp
, __be32
*p
,
314 struct nfsd3_accessres
*resp
)
320 #define nfsaclsvc_decode_voidargs NULL
321 #define nfsaclsvc_release_void NULL
322 #define nfsd3_fhandleargs nfsd_fhandle
323 #define nfsd3_attrstatres nfsd_attrstat
324 #define nfsd3_voidres nfsd3_voidargs
325 struct nfsd3_voidargs
{ int dummy
; };
327 #define PROC(name, argt, rest, relt, cache, respsize) \
328 { (svc_procfunc) nfsacld_proc_##name, \
329 (kxdrproc_t) nfsaclsvc_decode_##argt##args, \
330 (kxdrproc_t) nfsaclsvc_encode_##rest##res, \
331 (kxdrproc_t) nfsaclsvc_release_##relt, \
332 sizeof(struct nfsd3_##argt##args), \
333 sizeof(struct nfsd3_##rest##res), \
339 #define ST 1 /* status*/
340 #define AT 21 /* attributes */
341 #define pAT (1+AT) /* post attributes - conditional */
342 #define ACL (1+NFS_ACL_MAX_ENTRIES*3) /* Access Control List */
344 static struct svc_procedure nfsd_acl_procedures2
[] = {
345 PROC(null
, void, void, void, RC_NOCACHE
, ST
),
346 PROC(getacl
, getacl
, getacl
, getacl
, RC_NOCACHE
, ST
+1+2*(1+ACL
)),
347 PROC(setacl
, setacl
, attrstat
, attrstat
, RC_NOCACHE
, ST
+AT
),
348 PROC(getattr
, fhandle
, attrstat
, attrstat
, RC_NOCACHE
, ST
+AT
),
349 PROC(access
, access
, access
, access
, RC_NOCACHE
, ST
+AT
+1),
352 struct svc_version nfsd_acl_version2
= {
355 .vs_proc
= nfsd_acl_procedures2
,
356 .vs_dispatch
= nfsd_dispatch
,
357 .vs_xdrsize
= NFS3_SVC_XDRSIZE
,