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(&init_user_ns, inode, ACL_TYPE_ACCESS,
120 error = set_posix_acl(&init_user_ns, inode, ACL_TYPE_DEFAULT,
129 resp->status = fh_getattr(fh, &resp->stat);
132 /* argp->acl_{access,default} may have been allocated in
133 nfssvc_decode_setaclargs. */
134 posix_acl_release(argp->acl_access);
135 posix_acl_release(argp->acl_default);
142 resp->status = nfserrno(error);
147 * Check file attributes
149 static __be32 nfsacld_proc_getattr(struct svc_rqst *rqstp)
151 struct nfsd_fhandle *argp = rqstp->rq_argp;
152 struct nfsd_attrstat *resp = rqstp->rq_resp;
154 dprintk("nfsd: GETATTR %s\n", SVCFH_fmt(&argp->fh));
156 fh_copy(&resp->fh, &argp->fh);
157 resp->status = fh_verify(rqstp, &resp->fh, 0, NFSD_MAY_NOP);
158 if (resp->status != nfs_ok)
160 resp->status = fh_getattr(&resp->fh, &resp->stat);
168 static __be32 nfsacld_proc_access(struct svc_rqst *rqstp)
170 struct nfsd3_accessargs *argp = rqstp->rq_argp;
171 struct nfsd3_accessres *resp = rqstp->rq_resp;
173 dprintk("nfsd: ACCESS(2acl) %s 0x%x\n",
174 SVCFH_fmt(&argp->fh),
177 fh_copy(&resp->fh, &argp->fh);
178 resp->access = argp->access;
179 resp->status = nfsd_access(rqstp, &resp->fh, &resp->access, NULL);
180 if (resp->status != nfs_ok)
182 resp->status = fh_getattr(&resp->fh, &resp->stat);
188 * XDR decode functions
191 static int nfsaclsvc_decode_getaclargs(struct svc_rqst *rqstp, __be32 *p)
193 struct xdr_stream *xdr = &rqstp->rq_arg_stream;
194 struct nfsd3_getaclargs *argp = rqstp->rq_argp;
196 if (!svcxdr_decode_fhandle(xdr, &argp->fh))
198 if (xdr_stream_decode_u32(xdr, &argp->mask) < 0)
204 static int nfsaclsvc_decode_setaclargs(struct svc_rqst *rqstp, __be32 *p)
206 struct xdr_stream *xdr = &rqstp->rq_arg_stream;
207 struct nfsd3_setaclargs *argp = rqstp->rq_argp;
209 if (!svcxdr_decode_fhandle(xdr, &argp->fh))
211 if (xdr_stream_decode_u32(xdr, &argp->mask) < 0)
213 if (argp->mask & ~NFS_ACL_MASK)
215 if (!nfs_stream_decode_acl(xdr, NULL, (argp->mask & NFS_ACL) ?
216 &argp->acl_access : NULL))
218 if (!nfs_stream_decode_acl(xdr, NULL, (argp->mask & NFS_DFACL) ?
219 &argp->acl_default : NULL))
225 static int nfsaclsvc_decode_accessargs(struct svc_rqst *rqstp, __be32 *p)
227 struct xdr_stream *xdr = &rqstp->rq_arg_stream;
228 struct nfsd3_accessargs *args = rqstp->rq_argp;
230 if (!svcxdr_decode_fhandle(xdr, &args->fh))
232 if (xdr_stream_decode_u32(xdr, &args->access) < 0)
239 * XDR encode functions
243 static int nfsaclsvc_encode_getaclres(struct svc_rqst *rqstp, __be32 *p)
245 struct xdr_stream *xdr = &rqstp->rq_res_stream;
246 struct nfsd3_getaclres *resp = rqstp->rq_resp;
247 struct dentry *dentry = resp->fh.fh_dentry;
251 if (!svcxdr_encode_stat(xdr, resp->status))
254 if (dentry == NULL || d_really_is_negative(dentry))
256 inode = d_inode(dentry);
258 if (!svcxdr_encode_fattr(rqstp, xdr, &resp->fh, &resp->stat))
260 if (xdr_stream_encode_u32(xdr, resp->mask) < 0)
263 rqstp->rq_res.page_len = w = nfsacl_size(
264 (resp->mask & NFS_ACL) ? resp->acl_access : NULL,
265 (resp->mask & NFS_DFACL) ? resp->acl_default : NULL);
267 if (!*(rqstp->rq_next_page++))
272 if (!nfs_stream_encode_acl(xdr, inode, resp->acl_access,
273 resp->mask & NFS_ACL, 0))
275 if (!nfs_stream_encode_acl(xdr, inode, resp->acl_default,
276 resp->mask & NFS_DFACL, NFS_ACL_DEFAULT))
283 static int nfsaclsvc_encode_accessres(struct svc_rqst *rqstp, __be32 *p)
285 struct xdr_stream *xdr = &rqstp->rq_res_stream;
286 struct nfsd3_accessres *resp = rqstp->rq_resp;
288 if (!svcxdr_encode_stat(xdr, resp->status))
290 switch (resp->status) {
292 if (!svcxdr_encode_fattr(rqstp, xdr, &resp->fh, &resp->stat))
294 if (xdr_stream_encode_u32(xdr, resp->access) < 0)
303 * XDR release functions
305 static void nfsaclsvc_release_getacl(struct svc_rqst *rqstp)
307 struct nfsd3_getaclres *resp = rqstp->rq_resp;
310 posix_acl_release(resp->acl_access);
311 posix_acl_release(resp->acl_default);
314 static void nfsaclsvc_release_access(struct svc_rqst *rqstp)
316 struct nfsd3_accessres *resp = rqstp->rq_resp;
321 struct nfsd3_voidargs { int dummy; };
323 #define ST 1 /* status*/
324 #define AT 21 /* attributes */
325 #define pAT (1+AT) /* post attributes - conditional */
326 #define ACL (1+NFS_ACL_MAX_ENTRIES*3) /* Access Control List */
328 static const struct svc_procedure nfsd_acl_procedures2[5] = {
330 .pc_func = nfsacld_proc_null,
331 .pc_decode = nfssvc_decode_voidarg,
332 .pc_encode = nfssvc_encode_voidres,
333 .pc_argsize = sizeof(struct nfsd_voidargs),
334 .pc_ressize = sizeof(struct nfsd_voidres),
335 .pc_cachetype = RC_NOCACHE,
339 [ACLPROC2_GETACL] = {
340 .pc_func = nfsacld_proc_getacl,
341 .pc_decode = nfsaclsvc_decode_getaclargs,
342 .pc_encode = nfsaclsvc_encode_getaclres,
343 .pc_release = nfsaclsvc_release_getacl,
344 .pc_argsize = sizeof(struct nfsd3_getaclargs),
345 .pc_ressize = sizeof(struct nfsd3_getaclres),
346 .pc_cachetype = RC_NOCACHE,
347 .pc_xdrressize = ST+1+2*(1+ACL),
350 [ACLPROC2_SETACL] = {
351 .pc_func = nfsacld_proc_setacl,
352 .pc_decode = nfsaclsvc_decode_setaclargs,
353 .pc_encode = nfssvc_encode_attrstatres,
354 .pc_release = nfssvc_release_attrstat,
355 .pc_argsize = sizeof(struct nfsd3_setaclargs),
356 .pc_ressize = sizeof(struct nfsd_attrstat),
357 .pc_cachetype = RC_NOCACHE,
358 .pc_xdrressize = ST+AT,
361 [ACLPROC2_GETATTR] = {
362 .pc_func = nfsacld_proc_getattr,
363 .pc_decode = nfssvc_decode_fhandleargs,
364 .pc_encode = nfssvc_encode_attrstatres,
365 .pc_release = nfssvc_release_attrstat,
366 .pc_argsize = sizeof(struct nfsd_fhandle),
367 .pc_ressize = sizeof(struct nfsd_attrstat),
368 .pc_cachetype = RC_NOCACHE,
369 .pc_xdrressize = ST+AT,
370 .pc_name = "GETATTR",
372 [ACLPROC2_ACCESS] = {
373 .pc_func = nfsacld_proc_access,
374 .pc_decode = nfsaclsvc_decode_accessargs,
375 .pc_encode = nfsaclsvc_encode_accessres,
376 .pc_release = nfsaclsvc_release_access,
377 .pc_argsize = sizeof(struct nfsd3_accessargs),
378 .pc_ressize = sizeof(struct nfsd3_accessres),
379 .pc_cachetype = RC_NOCACHE,
380 .pc_xdrressize = ST+AT+1,
381 .pc_name = "SETATTR",
385 static unsigned int nfsd_acl_count2[ARRAY_SIZE(nfsd_acl_procedures2)];
386 const struct svc_version nfsd_acl_version2 = {
389 .vs_proc = nfsd_acl_procedures2,
390 .vs_count = nfsd_acl_count2,
391 .vs_dispatch = nfsd_dispatch,
392 .vs_xdrsize = NFS3_SVC_XDRSIZE,