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 xdr_stream *xdr = &rqstp->rq_arg_stream;
192 struct nfsd3_getaclargs *argp = rqstp->rq_argp;
194 if (!svcxdr_decode_fhandle(xdr, &argp->fh))
196 if (xdr_stream_decode_u32(xdr, &argp->mask) < 0)
202 static int nfsaclsvc_decode_setaclargs(struct svc_rqst *rqstp, __be32 *p)
204 struct xdr_stream *xdr = &rqstp->rq_arg_stream;
205 struct nfsd3_setaclargs *argp = rqstp->rq_argp;
207 if (!svcxdr_decode_fhandle(xdr, &argp->fh))
209 if (xdr_stream_decode_u32(xdr, &argp->mask) < 0)
211 if (argp->mask & ~NFS_ACL_MASK)
213 if (!nfs_stream_decode_acl(xdr, NULL, (argp->mask & NFS_ACL) ?
214 &argp->acl_access : NULL))
216 if (!nfs_stream_decode_acl(xdr, NULL, (argp->mask & NFS_DFACL) ?
217 &argp->acl_default : NULL))
223 static int nfsaclsvc_decode_accessargs(struct svc_rqst *rqstp, __be32 *p)
225 struct xdr_stream *xdr = &rqstp->rq_arg_stream;
226 struct nfsd3_accessargs *args = rqstp->rq_argp;
228 if (!svcxdr_decode_fhandle(xdr, &args->fh))
230 if (xdr_stream_decode_u32(xdr, &args->access) < 0)
237 * XDR encode functions
241 static int nfsaclsvc_encode_getaclres(struct svc_rqst *rqstp, __be32 *p)
243 struct nfsd3_getaclres *resp = rqstp->rq_resp;
244 struct dentry *dentry = resp->fh.fh_dentry;
246 struct kvec *head = rqstp->rq_res.head;
252 if (resp->status != nfs_ok)
253 return xdr_ressize_check(rqstp, p);
256 * Since this is version 2, the check for nfserr in
257 * nfsd_dispatch actually ensures the following cannot happen.
258 * However, it seems fragile to depend on that.
260 if (dentry == NULL || d_really_is_negative(dentry))
262 inode = d_inode(dentry);
264 p = nfs2svc_encode_fattr(rqstp, p, &resp->fh, &resp->stat);
265 *p++ = htonl(resp->mask);
266 if (!xdr_ressize_check(rqstp, p))
268 base = (char *)p - (char *)head->iov_base;
270 rqstp->rq_res.page_len = w = nfsacl_size(
271 (resp->mask & NFS_ACL) ? resp->acl_access : NULL,
272 (resp->mask & NFS_DFACL) ? resp->acl_default : NULL);
274 if (!*(rqstp->rq_next_page++))
279 n = nfsacl_encode(&rqstp->rq_res, base, inode,
281 resp->mask & NFS_ACL, 0);
283 n = nfsacl_encode(&rqstp->rq_res, base + n, inode,
285 resp->mask & NFS_DFACL,
290 static int nfsaclsvc_encode_attrstatres(struct svc_rqst *rqstp, __be32 *p)
292 struct nfsd_attrstat *resp = rqstp->rq_resp;
295 if (resp->status != nfs_ok)
298 p = nfs2svc_encode_fattr(rqstp, p, &resp->fh, &resp->stat);
300 return xdr_ressize_check(rqstp, p);
304 static int nfsaclsvc_encode_accessres(struct svc_rqst *rqstp, __be32 *p)
306 struct nfsd3_accessres *resp = rqstp->rq_resp;
309 if (resp->status != nfs_ok)
312 p = nfs2svc_encode_fattr(rqstp, p, &resp->fh, &resp->stat);
313 *p++ = htonl(resp->access);
315 return xdr_ressize_check(rqstp, p);
319 * XDR release functions
321 static void nfsaclsvc_release_getacl(struct svc_rqst *rqstp)
323 struct nfsd3_getaclres *resp = rqstp->rq_resp;
326 posix_acl_release(resp->acl_access);
327 posix_acl_release(resp->acl_default);
330 static void nfsaclsvc_release_attrstat(struct svc_rqst *rqstp)
332 struct nfsd_attrstat *resp = rqstp->rq_resp;
337 static void nfsaclsvc_release_access(struct svc_rqst *rqstp)
339 struct nfsd3_accessres *resp = rqstp->rq_resp;
344 struct nfsd3_voidargs { int dummy; };
346 #define ST 1 /* status*/
347 #define AT 21 /* attributes */
348 #define pAT (1+AT) /* post attributes - conditional */
349 #define ACL (1+NFS_ACL_MAX_ENTRIES*3) /* Access Control List */
351 static const struct svc_procedure nfsd_acl_procedures2[5] = {
353 .pc_func = nfsacld_proc_null,
354 .pc_decode = nfssvc_decode_voidarg,
355 .pc_encode = nfssvc_encode_voidres,
356 .pc_argsize = sizeof(struct nfsd_voidargs),
357 .pc_ressize = sizeof(struct nfsd_voidres),
358 .pc_cachetype = RC_NOCACHE,
362 [ACLPROC2_GETACL] = {
363 .pc_func = nfsacld_proc_getacl,
364 .pc_decode = nfsaclsvc_decode_getaclargs,
365 .pc_encode = nfsaclsvc_encode_getaclres,
366 .pc_release = nfsaclsvc_release_getacl,
367 .pc_argsize = sizeof(struct nfsd3_getaclargs),
368 .pc_ressize = sizeof(struct nfsd3_getaclres),
369 .pc_cachetype = RC_NOCACHE,
370 .pc_xdrressize = ST+1+2*(1+ACL),
373 [ACLPROC2_SETACL] = {
374 .pc_func = nfsacld_proc_setacl,
375 .pc_decode = nfsaclsvc_decode_setaclargs,
376 .pc_encode = nfsaclsvc_encode_attrstatres,
377 .pc_release = nfsaclsvc_release_attrstat,
378 .pc_argsize = sizeof(struct nfsd3_setaclargs),
379 .pc_ressize = sizeof(struct nfsd_attrstat),
380 .pc_cachetype = RC_NOCACHE,
381 .pc_xdrressize = ST+AT,
384 [ACLPROC2_GETATTR] = {
385 .pc_func = nfsacld_proc_getattr,
386 .pc_decode = nfssvc_decode_fhandleargs,
387 .pc_encode = nfsaclsvc_encode_attrstatres,
388 .pc_release = nfsaclsvc_release_attrstat,
389 .pc_argsize = sizeof(struct nfsd_fhandle),
390 .pc_ressize = sizeof(struct nfsd_attrstat),
391 .pc_cachetype = RC_NOCACHE,
392 .pc_xdrressize = ST+AT,
393 .pc_name = "GETATTR",
395 [ACLPROC2_ACCESS] = {
396 .pc_func = nfsacld_proc_access,
397 .pc_decode = nfsaclsvc_decode_accessargs,
398 .pc_encode = nfsaclsvc_encode_accessres,
399 .pc_release = nfsaclsvc_release_access,
400 .pc_argsize = sizeof(struct nfsd3_accessargs),
401 .pc_ressize = sizeof(struct nfsd3_accessres),
402 .pc_cachetype = RC_NOCACHE,
403 .pc_xdrressize = ST+AT+1,
404 .pc_name = "SETATTR",
408 static unsigned int nfsd_acl_count2[ARRAY_SIZE(nfsd_acl_procedures2)];
409 const struct svc_version nfsd_acl_version2 = {
412 .vs_proc = nfsd_acl_procedures2,
413 .vs_count = nfsd_acl_count2,
414 .vs_dispatch = nfsd_dispatch,
415 .vs_xdrsize = NFS3_SVC_XDRSIZE,