1 // SPDX-License-Identifier: GPL-2.0
3 * Process version 2 NFSACL requests.
5 * Copyright (C) 2002-2003 Andreas Gruenbacher <agruen@suse.de>
9 /* FIXME: nfsacl.h is a broken header */
10 #include <linux/nfsacl.h>
11 #include <linux/gfp.h>
16 #define NFSDDBG_FACILITY NFSDDBG_PROC
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;
38 dprintk("nfsd: GETACL(2acl) %s\n", SVCFH_fmt(&argp->fh));
40 fh = fh_copy(&resp->fh, &argp->fh);
41 resp->status = fh_verify(rqstp, &resp->fh, 0, NFSD_MAY_NOP);
42 if (resp->status != nfs_ok)
45 inode = d_inode(fh->fh_dentry);
47 if (argp->mask & ~NFS_ACL_MASK) {
48 resp->status = nfserr_inval;
51 resp->mask = argp->mask;
53 resp->status = fh_getattr(fh, &resp->stat);
54 if (resp->status != nfs_ok)
57 if (resp->mask & (NFS_ACL|NFS_ACLCNT)) {
58 acl = get_acl(inode, ACL_TYPE_ACCESS);
60 /* Solaris returns the inode's minimum ACL. */
61 acl = posix_acl_from_mode(inode->i_mode, GFP_KERNEL);
64 resp->status = nfserrno(PTR_ERR(acl));
67 resp->acl_access = acl;
69 if (resp->mask & (NFS_DFACL|NFS_DFACLCNT)) {
70 /* Check how Solaris handles requests for the Default ACL
71 of a non-directory! */
72 acl = get_acl(inode, ACL_TYPE_DEFAULT);
74 resp->status = nfserrno(PTR_ERR(acl));
77 resp->acl_default = acl;
80 /* resp->acl_{access,default} are released in nfssvc_release_getacl. */
85 posix_acl_release(resp->acl_access);
86 posix_acl_release(resp->acl_default);
91 * Set the Access and/or Default ACL of a file.
93 static __be32 nfsacld_proc_setacl(struct svc_rqst *rqstp)
95 struct nfsd3_setaclargs *argp = rqstp->rq_argp;
96 struct nfsd_attrstat *resp = rqstp->rq_resp;
101 dprintk("nfsd: SETACL(2acl) %s\n", SVCFH_fmt(&argp->fh));
103 fh = fh_copy(&resp->fh, &argp->fh);
104 resp->status = fh_verify(rqstp, &resp->fh, 0, NFSD_MAY_SATTR);
105 if (resp->status != nfs_ok)
108 inode = d_inode(fh->fh_dentry);
110 error = fh_want_write(fh);
116 error = set_posix_acl(inode, ACL_TYPE_ACCESS, argp->acl_access);
119 error = set_posix_acl(inode, ACL_TYPE_DEFAULT, argp->acl_default);
127 resp->status = fh_getattr(fh, &resp->stat);
130 /* argp->acl_{access,default} may have been allocated in
131 nfssvc_decode_setaclargs. */
132 posix_acl_release(argp->acl_access);
133 posix_acl_release(argp->acl_default);
140 resp->status = nfserrno(error);
145 * Check file attributes
147 static __be32 nfsacld_proc_getattr(struct svc_rqst *rqstp)
149 struct nfsd_fhandle *argp = rqstp->rq_argp;
150 struct nfsd_attrstat *resp = rqstp->rq_resp;
152 dprintk("nfsd: GETATTR %s\n", SVCFH_fmt(&argp->fh));
154 fh_copy(&resp->fh, &argp->fh);
155 resp->status = fh_verify(rqstp, &resp->fh, 0, NFSD_MAY_NOP);
156 if (resp->status != nfs_ok)
158 resp->status = fh_getattr(&resp->fh, &resp->stat);
166 static __be32 nfsacld_proc_access(struct svc_rqst *rqstp)
168 struct nfsd3_accessargs *argp = rqstp->rq_argp;
169 struct nfsd3_accessres *resp = rqstp->rq_resp;
171 dprintk("nfsd: ACCESS(2acl) %s 0x%x\n",
172 SVCFH_fmt(&argp->fh),
175 fh_copy(&resp->fh, &argp->fh);
176 resp->access = argp->access;
177 resp->status = nfsd_access(rqstp, &resp->fh, &resp->access, NULL);
178 if (resp->status != nfs_ok)
180 resp->status = fh_getattr(&resp->fh, &resp->stat);
186 * XDR decode functions
189 static int nfsaclsvc_decode_getaclargs(struct svc_rqst *rqstp, __be32 *p)
191 struct nfsd3_getaclargs *argp = rqstp->rq_argp;
193 p = nfs2svc_decode_fh(p, &argp->fh);
196 argp->mask = ntohl(*p); p++;
198 return xdr_argsize_check(rqstp, p);
202 static int nfsaclsvc_decode_setaclargs(struct svc_rqst *rqstp, __be32 *p)
204 struct nfsd3_setaclargs *argp = rqstp->rq_argp;
205 struct kvec *head = rqstp->rq_arg.head;
209 p = nfs2svc_decode_fh(p, &argp->fh);
212 argp->mask = ntohl(*p++);
213 if (argp->mask & ~NFS_ACL_MASK ||
214 !xdr_argsize_check(rqstp, p))
217 base = (char *)p - (char *)head->iov_base;
218 n = nfsacl_decode(&rqstp->rq_arg, base, NULL,
219 (argp->mask & NFS_ACL) ?
220 &argp->acl_access : NULL);
222 n = nfsacl_decode(&rqstp->rq_arg, base + n, NULL,
223 (argp->mask & NFS_DFACL) ?
224 &argp->acl_default : NULL);
228 static int nfsaclsvc_decode_fhandleargs(struct svc_rqst *rqstp, __be32 *p)
230 struct nfsd_fhandle *argp = rqstp->rq_argp;
232 p = nfs2svc_decode_fh(p, &argp->fh);
235 return xdr_argsize_check(rqstp, p);
238 static int nfsaclsvc_decode_accessargs(struct svc_rqst *rqstp, __be32 *p)
240 struct nfsd3_accessargs *argp = rqstp->rq_argp;
242 p = nfs2svc_decode_fh(p, &argp->fh);
245 argp->access = ntohl(*p++);
247 return xdr_argsize_check(rqstp, p);
251 * XDR encode functions
255 static int nfsaclsvc_encode_getaclres(struct svc_rqst *rqstp, __be32 *p)
257 struct nfsd3_getaclres *resp = rqstp->rq_resp;
258 struct dentry *dentry = resp->fh.fh_dentry;
260 struct kvec *head = rqstp->rq_res.head;
266 if (resp->status != nfs_ok)
267 return xdr_ressize_check(rqstp, p);
270 * Since this is version 2, the check for nfserr in
271 * nfsd_dispatch actually ensures the following cannot happen.
272 * However, it seems fragile to depend on that.
274 if (dentry == NULL || d_really_is_negative(dentry))
276 inode = d_inode(dentry);
278 p = nfs2svc_encode_fattr(rqstp, p, &resp->fh, &resp->stat);
279 *p++ = htonl(resp->mask);
280 if (!xdr_ressize_check(rqstp, p))
282 base = (char *)p - (char *)head->iov_base;
284 rqstp->rq_res.page_len = w = nfsacl_size(
285 (resp->mask & NFS_ACL) ? resp->acl_access : NULL,
286 (resp->mask & NFS_DFACL) ? resp->acl_default : NULL);
288 if (!*(rqstp->rq_next_page++))
293 n = nfsacl_encode(&rqstp->rq_res, base, inode,
295 resp->mask & NFS_ACL, 0);
297 n = nfsacl_encode(&rqstp->rq_res, base + n, inode,
299 resp->mask & NFS_DFACL,
304 static int nfsaclsvc_encode_attrstatres(struct svc_rqst *rqstp, __be32 *p)
306 struct nfsd_attrstat *resp = rqstp->rq_resp;
309 if (resp->status != nfs_ok)
312 p = nfs2svc_encode_fattr(rqstp, p, &resp->fh, &resp->stat);
314 return xdr_ressize_check(rqstp, p);
318 static int nfsaclsvc_encode_accessres(struct svc_rqst *rqstp, __be32 *p)
320 struct nfsd3_accessres *resp = rqstp->rq_resp;
323 if (resp->status != nfs_ok)
326 p = nfs2svc_encode_fattr(rqstp, p, &resp->fh, &resp->stat);
327 *p++ = htonl(resp->access);
329 return xdr_ressize_check(rqstp, p);
333 * XDR release functions
335 static void nfsaclsvc_release_getacl(struct svc_rqst *rqstp)
337 struct nfsd3_getaclres *resp = rqstp->rq_resp;
340 posix_acl_release(resp->acl_access);
341 posix_acl_release(resp->acl_default);
344 static void nfsaclsvc_release_attrstat(struct svc_rqst *rqstp)
346 struct nfsd_attrstat *resp = rqstp->rq_resp;
351 static void nfsaclsvc_release_access(struct svc_rqst *rqstp)
353 struct nfsd3_accessres *resp = rqstp->rq_resp;
358 struct nfsd3_voidargs { int dummy; };
360 #define ST 1 /* status*/
361 #define AT 21 /* attributes */
362 #define pAT (1+AT) /* post attributes - conditional */
363 #define ACL (1+NFS_ACL_MAX_ENTRIES*3) /* Access Control List */
365 static const struct svc_procedure nfsd_acl_procedures2[5] = {
367 .pc_func = nfsacld_proc_null,
368 .pc_decode = nfssvc_decode_voidarg,
369 .pc_encode = nfssvc_encode_voidres,
370 .pc_argsize = sizeof(struct nfsd_voidargs),
371 .pc_ressize = sizeof(struct nfsd_voidres),
372 .pc_cachetype = RC_NOCACHE,
375 [ACLPROC2_GETACL] = {
376 .pc_func = nfsacld_proc_getacl,
377 .pc_decode = nfsaclsvc_decode_getaclargs,
378 .pc_encode = nfsaclsvc_encode_getaclres,
379 .pc_release = nfsaclsvc_release_getacl,
380 .pc_argsize = sizeof(struct nfsd3_getaclargs),
381 .pc_ressize = sizeof(struct nfsd3_getaclres),
382 .pc_cachetype = RC_NOCACHE,
383 .pc_xdrressize = ST+1+2*(1+ACL),
385 [ACLPROC2_SETACL] = {
386 .pc_func = nfsacld_proc_setacl,
387 .pc_decode = nfsaclsvc_decode_setaclargs,
388 .pc_encode = nfsaclsvc_encode_attrstatres,
389 .pc_release = nfsaclsvc_release_attrstat,
390 .pc_argsize = sizeof(struct nfsd3_setaclargs),
391 .pc_ressize = sizeof(struct nfsd_attrstat),
392 .pc_cachetype = RC_NOCACHE,
393 .pc_xdrressize = ST+AT,
395 [ACLPROC2_GETATTR] = {
396 .pc_func = nfsacld_proc_getattr,
397 .pc_decode = nfsaclsvc_decode_fhandleargs,
398 .pc_encode = nfsaclsvc_encode_attrstatres,
399 .pc_release = nfsaclsvc_release_attrstat,
400 .pc_argsize = sizeof(struct nfsd_fhandle),
401 .pc_ressize = sizeof(struct nfsd_attrstat),
402 .pc_cachetype = RC_NOCACHE,
403 .pc_xdrressize = ST+AT,
405 [ACLPROC2_ACCESS] = {
406 .pc_func = nfsacld_proc_access,
407 .pc_decode = nfsaclsvc_decode_accessargs,
408 .pc_encode = nfsaclsvc_encode_accessres,
409 .pc_release = nfsaclsvc_release_access,
410 .pc_argsize = sizeof(struct nfsd3_accessargs),
411 .pc_ressize = sizeof(struct nfsd3_accessres),
412 .pc_cachetype = RC_NOCACHE,
413 .pc_xdrressize = ST+AT+1,
417 static unsigned int nfsd_acl_count2[ARRAY_SIZE(nfsd_acl_procedures2)];
418 const struct svc_version nfsd_acl_version2 = {
421 .vs_proc = nfsd_acl_procedures2,
422 .vs_count = nfsd_acl_count2,
423 .vs_dispatch = nfsd_dispatch,
424 .vs_xdrsize = NFS3_SVC_XDRSIZE,