2 * Process version 2 NFSACL requests.
4 * Copyright (C) 2002-2003 Andreas Gruenbacher <agruen@suse.de>
8 /* FIXME: nfsacl.h is a broken header */
9 #include <linux/nfsacl.h>
10 #include <linux/gfp.h>
15 #define NFSDDBG_FACILITY NFSDDBG_PROC
16 #define RETURN_STATUS(st) { resp->status = (st); return (st); }
22 nfsacld_proc_null(struct svc_rqst *rqstp, void *argp, void *resp)
28 * Get the Access and/or Default ACL of a file.
30 static __be32 nfsacld_proc_getacl(struct svc_rqst * rqstp,
31 struct nfsd3_getaclargs *argp, struct nfsd3_getaclres *resp)
33 struct posix_acl *acl;
38 dprintk("nfsd: GETACL(2acl) %s\n", SVCFH_fmt(&argp->fh));
40 fh = fh_copy(&resp->fh, &argp->fh);
41 nfserr = fh_verify(rqstp, &resp->fh, 0, NFSD_MAY_NOP);
43 RETURN_STATUS(nfserr);
45 inode = fh->fh_dentry->d_inode;
47 if (argp->mask & ~(NFS_ACL|NFS_ACLCNT|NFS_DFACL|NFS_DFACLCNT))
48 RETURN_STATUS(nfserr_inval);
49 resp->mask = argp->mask;
51 nfserr = fh_getattr(fh, &resp->stat);
55 if (resp->mask & (NFS_ACL|NFS_ACLCNT)) {
56 acl = get_acl(inode, ACL_TYPE_ACCESS);
58 nfserr = nfserrno(PTR_ERR(acl));
62 /* Solaris returns the inode's minimum ACL. */
63 acl = posix_acl_from_mode(inode->i_mode, GFP_KERNEL);
65 resp->acl_access = acl;
67 if (resp->mask & (NFS_DFACL|NFS_DFACLCNT)) {
68 /* Check how Solaris handles requests for the Default ACL
69 of a non-directory! */
70 acl = get_acl(inode, ACL_TYPE_DEFAULT);
72 nfserr = nfserrno(PTR_ERR(acl));
75 resp->acl_default = acl;
78 /* resp->acl_{access,default} are released in nfssvc_release_getacl. */
82 posix_acl_release(resp->acl_access);
83 posix_acl_release(resp->acl_default);
84 RETURN_STATUS(nfserr);
88 * Set the Access and/or Default ACL of a file.
90 static __be32 nfsacld_proc_setacl(struct svc_rqst * rqstp,
91 struct nfsd3_setaclargs *argp,
92 struct nfsd_attrstat *resp)
99 dprintk("nfsd: SETACL(2acl) %s\n", SVCFH_fmt(&argp->fh));
101 fh = fh_copy(&resp->fh, &argp->fh);
102 nfserr = fh_verify(rqstp, &resp->fh, 0, NFSD_MAY_SATTR);
106 inode = fh->fh_dentry->d_inode;
107 if (!IS_POSIXACL(inode) || !inode->i_op->set_acl) {
112 error = fh_want_write(fh);
116 error = inode->i_op->set_acl(inode, argp->acl_access, ACL_TYPE_ACCESS);
119 error = inode->i_op->set_acl(inode, argp->acl_default,
126 nfserr = fh_getattr(fh, &resp->stat);
129 /* argp->acl_{access,default} may have been allocated in
130 nfssvc_decode_setaclargs. */
131 posix_acl_release(argp->acl_access);
132 posix_acl_release(argp->acl_default);
137 nfserr = nfserrno(error);
142 * Check file attributes
144 static __be32 nfsacld_proc_getattr(struct svc_rqst * rqstp,
145 struct nfsd_fhandle *argp, struct nfsd_attrstat *resp)
148 dprintk("nfsd: GETATTR %s\n", SVCFH_fmt(&argp->fh));
150 fh_copy(&resp->fh, &argp->fh);
151 nfserr = fh_verify(rqstp, &resp->fh, 0, NFSD_MAY_NOP);
154 nfserr = fh_getattr(&resp->fh, &resp->stat);
161 static __be32 nfsacld_proc_access(struct svc_rqst *rqstp, struct nfsd3_accessargs *argp,
162 struct nfsd3_accessres *resp)
166 dprintk("nfsd: ACCESS(2acl) %s 0x%x\n",
167 SVCFH_fmt(&argp->fh),
170 fh_copy(&resp->fh, &argp->fh);
171 resp->access = argp->access;
172 nfserr = nfsd_access(rqstp, &resp->fh, &resp->access, NULL);
175 nfserr = fh_getattr(&resp->fh, &resp->stat);
180 * XDR decode functions
182 static int nfsaclsvc_decode_getaclargs(struct svc_rqst *rqstp, __be32 *p,
183 struct nfsd3_getaclargs *argp)
185 if (!(p = nfs2svc_decode_fh(p, &argp->fh)))
187 argp->mask = ntohl(*p); p++;
189 return xdr_argsize_check(rqstp, p);
193 static int nfsaclsvc_decode_setaclargs(struct svc_rqst *rqstp, __be32 *p,
194 struct nfsd3_setaclargs *argp)
196 struct kvec *head = rqstp->rq_arg.head;
200 if (!(p = nfs2svc_decode_fh(p, &argp->fh)))
202 argp->mask = ntohl(*p++);
203 if (argp->mask & ~(NFS_ACL|NFS_ACLCNT|NFS_DFACL|NFS_DFACLCNT) ||
204 !xdr_argsize_check(rqstp, p))
207 base = (char *)p - (char *)head->iov_base;
208 n = nfsacl_decode(&rqstp->rq_arg, base, NULL,
209 (argp->mask & NFS_ACL) ?
210 &argp->acl_access : NULL);
212 n = nfsacl_decode(&rqstp->rq_arg, base + n, NULL,
213 (argp->mask & NFS_DFACL) ?
214 &argp->acl_default : NULL);
218 static int nfsaclsvc_decode_fhandleargs(struct svc_rqst *rqstp, __be32 *p,
219 struct nfsd_fhandle *argp)
221 if (!(p = nfs2svc_decode_fh(p, &argp->fh)))
223 return xdr_argsize_check(rqstp, p);
226 static int nfsaclsvc_decode_accessargs(struct svc_rqst *rqstp, __be32 *p,
227 struct nfsd3_accessargs *argp)
229 if (!(p = nfs2svc_decode_fh(p, &argp->fh)))
231 argp->access = ntohl(*p++);
233 return xdr_argsize_check(rqstp, p);
237 * XDR encode functions
241 * There must be an encoding function for void results so svc_process
242 * will work properly.
244 static int nfsaclsvc_encode_voidres(struct svc_rqst *rqstp, __be32 *p, void *dummy)
246 return xdr_ressize_check(rqstp, p);
250 static int nfsaclsvc_encode_getaclres(struct svc_rqst *rqstp, __be32 *p,
251 struct nfsd3_getaclres *resp)
253 struct dentry *dentry = resp->fh.fh_dentry;
255 struct kvec *head = rqstp->rq_res.head;
261 * Since this is version 2, the check for nfserr in
262 * nfsd_dispatch actually ensures the following cannot happen.
263 * However, it seems fragile to depend on that.
265 if (dentry == NULL || dentry->d_inode == NULL)
267 inode = dentry->d_inode;
269 p = nfs2svc_encode_fattr(rqstp, p, &resp->fh, &resp->stat);
270 *p++ = htonl(resp->mask);
271 if (!xdr_ressize_check(rqstp, p))
273 base = (char *)p - (char *)head->iov_base;
275 rqstp->rq_res.page_len = w = nfsacl_size(
276 (resp->mask & NFS_ACL) ? resp->acl_access : NULL,
277 (resp->mask & NFS_DFACL) ? resp->acl_default : NULL);
279 if (!*(rqstp->rq_next_page++))
284 n = nfsacl_encode(&rqstp->rq_res, base, inode,
286 resp->mask & NFS_ACL, 0);
288 n = nfsacl_encode(&rqstp->rq_res, base + n, inode,
290 resp->mask & NFS_DFACL,
297 static int nfsaclsvc_encode_attrstatres(struct svc_rqst *rqstp, __be32 *p,
298 struct nfsd_attrstat *resp)
300 p = nfs2svc_encode_fattr(rqstp, p, &resp->fh, &resp->stat);
301 return xdr_ressize_check(rqstp, p);
305 static int nfsaclsvc_encode_accessres(struct svc_rqst *rqstp, __be32 *p,
306 struct nfsd3_accessres *resp)
308 p = nfs2svc_encode_fattr(rqstp, p, &resp->fh, &resp->stat);
309 *p++ = htonl(resp->access);
310 return xdr_ressize_check(rqstp, p);
314 * XDR release functions
316 static int nfsaclsvc_release_getacl(struct svc_rqst *rqstp, __be32 *p,
317 struct nfsd3_getaclres *resp)
320 posix_acl_release(resp->acl_access);
321 posix_acl_release(resp->acl_default);
325 static int nfsaclsvc_release_attrstat(struct svc_rqst *rqstp, __be32 *p,
326 struct nfsd_attrstat *resp)
332 static int nfsaclsvc_release_access(struct svc_rqst *rqstp, __be32 *p,
333 struct nfsd3_accessres *resp)
339 #define nfsaclsvc_decode_voidargs NULL
340 #define nfsaclsvc_release_void NULL
341 #define nfsd3_fhandleargs nfsd_fhandle
342 #define nfsd3_attrstatres nfsd_attrstat
343 #define nfsd3_voidres nfsd3_voidargs
344 struct nfsd3_voidargs { int dummy; };
346 #define PROC(name, argt, rest, relt, cache, respsize) \
347 { (svc_procfunc) nfsacld_proc_##name, \
348 (kxdrproc_t) nfsaclsvc_decode_##argt##args, \
349 (kxdrproc_t) nfsaclsvc_encode_##rest##res, \
350 (kxdrproc_t) nfsaclsvc_release_##relt, \
351 sizeof(struct nfsd3_##argt##args), \
352 sizeof(struct nfsd3_##rest##res), \
358 #define ST 1 /* status*/
359 #define AT 21 /* attributes */
360 #define pAT (1+AT) /* post attributes - conditional */
361 #define ACL (1+NFS_ACL_MAX_ENTRIES*3) /* Access Control List */
363 static struct svc_procedure nfsd_acl_procedures2[] = {
364 PROC(null, void, void, void, RC_NOCACHE, ST),
365 PROC(getacl, getacl, getacl, getacl, RC_NOCACHE, ST+1+2*(1+ACL)),
366 PROC(setacl, setacl, attrstat, attrstat, RC_NOCACHE, ST+AT),
367 PROC(getattr, fhandle, attrstat, attrstat, RC_NOCACHE, ST+AT),
368 PROC(access, access, access, access, RC_NOCACHE, ST+AT+1),
371 struct svc_version nfsd_acl_version2 = {
374 .vs_proc = nfsd_acl_procedures2,
375 .vs_dispatch = nfsd_dispatch,
376 .vs_xdrsize = NFS3_SVC_XDRSIZE,