2 * linux/fs/nfsd/nfs3acl.c
4 * Process version 3 NFSACL requests.
6 * Copyright (C) 2002-2003 Andreas Gruenbacher <agruen@suse.de>
9 #include <linux/sunrpc/svc.h>
10 #include <linux/nfs3.h>
11 #include <linux/nfsd/nfsd.h>
12 #include <linux/nfsd/cache.h>
13 #include <linux/nfsd/xdr3.h>
14 #include <linux/posix_acl.h>
15 #include <linux/nfsacl.h>
17 #define RETURN_STATUS(st) { resp->status = (st); return (st); }
23 nfsd3_proc_null(struct svc_rqst *rqstp, void *argp, void *resp)
29 * Get the Access and/or Default ACL of a file.
31 static __be32 nfsd3_proc_getacl(struct svc_rqst * rqstp,
32 struct nfsd3_getaclargs *argp, struct nfsd3_getaclres *resp)
35 struct posix_acl *acl;
38 fh = fh_copy(&resp->fh, &argp->fh);
39 nfserr = fh_verify(rqstp, &resp->fh, 0, NFSD_MAY_NOP);
41 RETURN_STATUS(nfserr);
43 if (argp->mask & ~(NFS_ACL|NFS_ACLCNT|NFS_DFACL|NFS_DFACLCNT))
44 RETURN_STATUS(nfserr_inval);
45 resp->mask = argp->mask;
47 if (resp->mask & (NFS_ACL|NFS_ACLCNT)) {
48 acl = nfsd_get_posix_acl(fh, ACL_TYPE_ACCESS);
50 int err = PTR_ERR(acl);
52 if (err == -ENODATA || err == -EOPNOTSUPP)
55 nfserr = nfserrno(err);
60 /* Solaris returns the inode's minimum ACL. */
62 struct inode *inode = fh->fh_dentry->d_inode;
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! */
71 acl = nfsd_get_posix_acl(fh, ACL_TYPE_DEFAULT);
73 int err = PTR_ERR(acl);
75 if (err == -ENODATA || err == -EOPNOTSUPP)
78 nfserr = nfserrno(err);
82 resp->acl_default = acl;
85 /* resp->acl_{access,default} are released in nfs3svc_release_getacl. */
89 posix_acl_release(resp->acl_access);
90 posix_acl_release(resp->acl_default);
91 RETURN_STATUS(nfserr);
95 * Set the Access and/or Default ACL of a file.
97 static __be32 nfsd3_proc_setacl(struct svc_rqst * rqstp,
98 struct nfsd3_setaclargs *argp,
99 struct nfsd3_attrstat *resp)
104 fh = fh_copy(&resp->fh, &argp->fh);
105 nfserr = fh_verify(rqstp, &resp->fh, 0, NFSD_MAY_SATTR);
108 nfserr = nfserrno( nfsd_set_posix_acl(
109 fh, ACL_TYPE_ACCESS, argp->acl_access) );
112 nfserr = nfserrno( nfsd_set_posix_acl(
113 fh, ACL_TYPE_DEFAULT, argp->acl_default) );
116 /* argp->acl_{access,default} may have been allocated in
117 nfs3svc_decode_setaclargs. */
118 posix_acl_release(argp->acl_access);
119 posix_acl_release(argp->acl_default);
120 RETURN_STATUS(nfserr);
124 * XDR decode functions
126 static int nfs3svc_decode_getaclargs(struct svc_rqst *rqstp, __be32 *p,
127 struct nfsd3_getaclargs *args)
129 if (!(p = nfs3svc_decode_fh(p, &args->fh)))
131 args->mask = ntohl(*p); p++;
133 return xdr_argsize_check(rqstp, p);
137 static int nfs3svc_decode_setaclargs(struct svc_rqst *rqstp, __be32 *p,
138 struct nfsd3_setaclargs *args)
140 struct kvec *head = rqstp->rq_arg.head;
144 if (!(p = nfs3svc_decode_fh(p, &args->fh)))
146 args->mask = ntohl(*p++);
147 if (args->mask & ~(NFS_ACL|NFS_ACLCNT|NFS_DFACL|NFS_DFACLCNT) ||
148 !xdr_argsize_check(rqstp, p))
151 base = (char *)p - (char *)head->iov_base;
152 n = nfsacl_decode(&rqstp->rq_arg, base, NULL,
153 (args->mask & NFS_ACL) ?
154 &args->acl_access : NULL);
156 n = nfsacl_decode(&rqstp->rq_arg, base + n, NULL,
157 (args->mask & NFS_DFACL) ?
158 &args->acl_default : NULL);
163 * XDR encode functions
167 static int nfs3svc_encode_getaclres(struct svc_rqst *rqstp, __be32 *p,
168 struct nfsd3_getaclres *resp)
170 struct dentry *dentry = resp->fh.fh_dentry;
172 p = nfs3svc_encode_post_op_attr(rqstp, p, &resp->fh);
173 if (resp->status == 0 && dentry && dentry->d_inode) {
174 struct inode *inode = dentry->d_inode;
175 struct kvec *head = rqstp->rq_res.head;
180 *p++ = htonl(resp->mask);
181 if (!xdr_ressize_check(rqstp, p))
183 base = (char *)p - (char *)head->iov_base;
185 rqstp->rq_res.page_len = w = nfsacl_size(
186 (resp->mask & NFS_ACL) ? resp->acl_access : NULL,
187 (resp->mask & NFS_DFACL) ? resp->acl_default : NULL);
189 if (!rqstp->rq_respages[rqstp->rq_resused++])
194 n = nfsacl_encode(&rqstp->rq_res, base, inode,
196 resp->mask & NFS_ACL, 0);
198 n = nfsacl_encode(&rqstp->rq_res, base + n, inode,
200 resp->mask & NFS_DFACL,
205 if (!xdr_ressize_check(rqstp, p))
212 static int nfs3svc_encode_setaclres(struct svc_rqst *rqstp, __be32 *p,
213 struct nfsd3_attrstat *resp)
215 p = nfs3svc_encode_post_op_attr(rqstp, p, &resp->fh);
217 return xdr_ressize_check(rqstp, p);
221 * XDR release functions
223 static int nfs3svc_release_getacl(struct svc_rqst *rqstp, __be32 *p,
224 struct nfsd3_getaclres *resp)
227 posix_acl_release(resp->acl_access);
228 posix_acl_release(resp->acl_default);
232 #define nfs3svc_decode_voidargs NULL
233 #define nfs3svc_release_void NULL
234 #define nfsd3_setaclres nfsd3_attrstat
235 #define nfsd3_voidres nfsd3_voidargs
236 struct nfsd3_voidargs { int dummy; };
238 #define PROC(name, argt, rest, relt, cache, respsize) \
239 { (svc_procfunc) nfsd3_proc_##name, \
240 (kxdrproc_t) nfs3svc_decode_##argt##args, \
241 (kxdrproc_t) nfs3svc_encode_##rest##res, \
242 (kxdrproc_t) nfs3svc_release_##relt, \
243 sizeof(struct nfsd3_##argt##args), \
244 sizeof(struct nfsd3_##rest##res), \
250 #define ST 1 /* status*/
251 #define AT 21 /* attributes */
252 #define pAT (1+AT) /* post attributes - conditional */
253 #define ACL (1+NFS_ACL_MAX_ENTRIES*3) /* Access Control List */
255 static struct svc_procedure nfsd_acl_procedures3[] = {
256 PROC(null, void, void, void, RC_NOCACHE, ST),
257 PROC(getacl, getacl, getacl, getacl, RC_NOCACHE, ST+1+2*(1+ACL)),
258 PROC(setacl, setacl, setacl, fhandle, RC_NOCACHE, ST+pAT),
261 struct svc_version nfsd_acl_version3 = {
264 .vs_proc = nfsd_acl_procedures3,
265 .vs_dispatch = nfsd_dispatch,
266 .vs_xdrsize = NFS3_SVC_XDRSIZE,