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)
28 * Get the Access and/or Default ACL of a file.
30 static __be32 nfsacld_proc_getacl(struct svc_rqst *rqstp)
32 struct nfsd3_getaclargs *argp = rqstp->rq_argp;
33 struct nfsd3_getaclres *resp = rqstp->rq_resp;
34 struct posix_acl *acl;
39 dprintk("nfsd: GETACL(2acl) %s\n", SVCFH_fmt(&argp->fh));
41 fh = fh_copy(&resp->fh, &argp->fh);
42 nfserr = fh_verify(rqstp, &resp->fh, 0, NFSD_MAY_NOP);
44 RETURN_STATUS(nfserr);
46 inode = d_inode(fh->fh_dentry);
48 if (argp->mask & ~NFS_ACL_MASK)
49 RETURN_STATUS(nfserr_inval);
50 resp->mask = argp->mask;
52 nfserr = fh_getattr(fh, &resp->stat);
54 RETURN_STATUS(nfserr);
56 if (resp->mask & (NFS_ACL|NFS_ACLCNT)) {
57 acl = get_acl(inode, ACL_TYPE_ACCESS);
59 /* Solaris returns the inode's minimum ACL. */
60 acl = posix_acl_from_mode(inode->i_mode, GFP_KERNEL);
63 nfserr = nfserrno(PTR_ERR(acl));
66 resp->acl_access = acl;
68 if (resp->mask & (NFS_DFACL|NFS_DFACLCNT)) {
69 /* Check how Solaris handles requests for the Default ACL
70 of a non-directory! */
71 acl = get_acl(inode, ACL_TYPE_DEFAULT);
73 nfserr = nfserrno(PTR_ERR(acl));
76 resp->acl_default = acl;
79 /* resp->acl_{access,default} are released in nfssvc_release_getacl. */
83 posix_acl_release(resp->acl_access);
84 posix_acl_release(resp->acl_default);
85 RETURN_STATUS(nfserr);
89 * Set the Access and/or Default ACL of a file.
91 static __be32 nfsacld_proc_setacl(struct svc_rqst *rqstp)
93 struct nfsd3_setaclargs *argp = rqstp->rq_argp;
94 struct nfsd_attrstat *resp = rqstp->rq_resp;
100 dprintk("nfsd: SETACL(2acl) %s\n", SVCFH_fmt(&argp->fh));
102 fh = fh_copy(&resp->fh, &argp->fh);
103 nfserr = fh_verify(rqstp, &resp->fh, 0, NFSD_MAY_SATTR);
107 inode = d_inode(fh->fh_dentry);
109 error = fh_want_write(fh);
115 error = set_posix_acl(inode, ACL_TYPE_ACCESS, argp->acl_access);
118 error = set_posix_acl(inode, ACL_TYPE_DEFAULT, 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);
138 nfserr = nfserrno(error);
143 * Check file attributes
145 static __be32 nfsacld_proc_getattr(struct svc_rqst *rqstp)
147 struct nfsd_fhandle *argp = rqstp->rq_argp;
148 struct nfsd_attrstat *resp = rqstp->rq_resp;
150 dprintk("nfsd: GETATTR %s\n", SVCFH_fmt(&argp->fh));
152 fh_copy(&resp->fh, &argp->fh);
153 nfserr = fh_verify(rqstp, &resp->fh, 0, NFSD_MAY_NOP);
156 nfserr = fh_getattr(&resp->fh, &resp->stat);
163 static __be32 nfsacld_proc_access(struct svc_rqst *rqstp)
165 struct nfsd3_accessargs *argp = rqstp->rq_argp;
166 struct nfsd3_accessres *resp = rqstp->rq_resp;
169 dprintk("nfsd: ACCESS(2acl) %s 0x%x\n",
170 SVCFH_fmt(&argp->fh),
173 fh_copy(&resp->fh, &argp->fh);
174 resp->access = argp->access;
175 nfserr = nfsd_access(rqstp, &resp->fh, &resp->access, NULL);
178 nfserr = fh_getattr(&resp->fh, &resp->stat);
183 * XDR decode functions
185 static int nfsaclsvc_decode_getaclargs(struct svc_rqst *rqstp, __be32 *p)
187 struct nfsd3_getaclargs *argp = rqstp->rq_argp;
189 p = nfs2svc_decode_fh(p, &argp->fh);
192 argp->mask = ntohl(*p); p++;
194 return xdr_argsize_check(rqstp, p);
198 static int nfsaclsvc_decode_setaclargs(struct svc_rqst *rqstp, __be32 *p)
200 struct nfsd3_setaclargs *argp = rqstp->rq_argp;
201 struct kvec *head = rqstp->rq_arg.head;
205 p = nfs2svc_decode_fh(p, &argp->fh);
208 argp->mask = ntohl(*p++);
209 if (argp->mask & ~NFS_ACL_MASK ||
210 !xdr_argsize_check(rqstp, p))
213 base = (char *)p - (char *)head->iov_base;
214 n = nfsacl_decode(&rqstp->rq_arg, base, NULL,
215 (argp->mask & NFS_ACL) ?
216 &argp->acl_access : NULL);
218 n = nfsacl_decode(&rqstp->rq_arg, base + n, NULL,
219 (argp->mask & NFS_DFACL) ?
220 &argp->acl_default : NULL);
224 static int nfsaclsvc_decode_fhandleargs(struct svc_rqst *rqstp, __be32 *p)
226 struct nfsd_fhandle *argp = rqstp->rq_argp;
228 p = nfs2svc_decode_fh(p, &argp->fh);
231 return xdr_argsize_check(rqstp, p);
234 static int nfsaclsvc_decode_accessargs(struct svc_rqst *rqstp, __be32 *p)
236 struct nfsd3_accessargs *argp = rqstp->rq_argp;
238 p = nfs2svc_decode_fh(p, &argp->fh);
241 argp->access = ntohl(*p++);
243 return xdr_argsize_check(rqstp, p);
247 * XDR encode functions
251 * There must be an encoding function for void results so svc_process
252 * will work properly.
254 static int nfsaclsvc_encode_voidres(struct svc_rqst *rqstp, __be32 *p)
256 return xdr_ressize_check(rqstp, p);
260 static int nfsaclsvc_encode_getaclres(struct svc_rqst *rqstp, __be32 *p)
262 struct nfsd3_getaclres *resp = rqstp->rq_resp;
263 struct dentry *dentry = resp->fh.fh_dentry;
265 struct kvec *head = rqstp->rq_res.head;
271 * Since this is version 2, the check for nfserr in
272 * nfsd_dispatch actually ensures the following cannot happen.
273 * However, it seems fragile to depend on that.
275 if (dentry == NULL || d_really_is_negative(dentry))
277 inode = d_inode(dentry);
279 p = nfs2svc_encode_fattr(rqstp, p, &resp->fh, &resp->stat);
280 *p++ = htonl(resp->mask);
281 if (!xdr_ressize_check(rqstp, p))
283 base = (char *)p - (char *)head->iov_base;
285 rqstp->rq_res.page_len = w = nfsacl_size(
286 (resp->mask & NFS_ACL) ? resp->acl_access : NULL,
287 (resp->mask & NFS_DFACL) ? resp->acl_default : NULL);
289 if (!*(rqstp->rq_next_page++))
294 n = nfsacl_encode(&rqstp->rq_res, base, inode,
296 resp->mask & NFS_ACL, 0);
298 n = nfsacl_encode(&rqstp->rq_res, base + n, inode,
300 resp->mask & NFS_DFACL,
305 static int nfsaclsvc_encode_attrstatres(struct svc_rqst *rqstp, __be32 *p)
307 struct nfsd_attrstat *resp = rqstp->rq_resp;
309 p = nfs2svc_encode_fattr(rqstp, p, &resp->fh, &resp->stat);
310 return xdr_ressize_check(rqstp, p);
314 static int nfsaclsvc_encode_accessres(struct svc_rqst *rqstp, __be32 *p)
316 struct nfsd3_accessres *resp = rqstp->rq_resp;
318 p = nfs2svc_encode_fattr(rqstp, p, &resp->fh, &resp->stat);
319 *p++ = htonl(resp->access);
320 return xdr_ressize_check(rqstp, p);
324 * XDR release functions
326 static void nfsaclsvc_release_getacl(struct svc_rqst *rqstp)
328 struct nfsd3_getaclres *resp = rqstp->rq_resp;
331 posix_acl_release(resp->acl_access);
332 posix_acl_release(resp->acl_default);
335 static void nfsaclsvc_release_attrstat(struct svc_rqst *rqstp)
337 struct nfsd_attrstat *resp = rqstp->rq_resp;
342 static void nfsaclsvc_release_access(struct svc_rqst *rqstp)
344 struct nfsd3_accessres *resp = rqstp->rq_resp;
349 #define nfsaclsvc_decode_voidargs NULL
350 #define nfsaclsvc_release_void NULL
351 #define nfsd3_fhandleargs nfsd_fhandle
352 #define nfsd3_attrstatres nfsd_attrstat
353 #define nfsd3_voidres nfsd3_voidargs
354 struct nfsd3_voidargs { int dummy; };
356 #define PROC(name, argt, rest, relt, cache, respsize) \
358 .pc_func = nfsacld_proc_##name, \
359 .pc_decode = nfsaclsvc_decode_##argt##args, \
360 .pc_encode = nfsaclsvc_encode_##rest##res, \
361 .pc_release = nfsaclsvc_release_##relt, \
362 .pc_argsize = sizeof(struct nfsd3_##argt##args), \
363 .pc_ressize = sizeof(struct nfsd3_##rest##res), \
364 .pc_cachetype = cache, \
365 .pc_xdrressize = respsize, \
368 #define ST 1 /* status*/
369 #define AT 21 /* attributes */
370 #define pAT (1+AT) /* post attributes - conditional */
371 #define ACL (1+NFS_ACL_MAX_ENTRIES*3) /* Access Control List */
373 static struct svc_procedure nfsd_acl_procedures2[] = {
374 PROC(null, void, void, void, RC_NOCACHE, ST),
375 PROC(getacl, getacl, getacl, getacl, RC_NOCACHE, ST+1+2*(1+ACL)),
376 PROC(setacl, setacl, attrstat, attrstat, RC_NOCACHE, ST+AT),
377 PROC(getattr, fhandle, attrstat, attrstat, RC_NOCACHE, ST+AT),
378 PROC(access, access, access, access, RC_NOCACHE, ST+AT+1),
381 struct svc_version nfsd_acl_version2 = {
384 .vs_proc = nfsd_acl_procedures2,
385 .vs_dispatch = nfsd_dispatch,
386 .vs_xdrsize = NFS3_SVC_XDRSIZE,