2 * Process version 3 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 RETURN_STATUS(st) { resp->status = (st); return (st); }
21 nfsd3_proc_null(struct svc_rqst *rqstp, void *argp, void *resp)
27 * Get the Access and/or Default ACL of a file.
29 static __be32 nfsd3_proc_getacl(struct svc_rqst * rqstp,
30 struct nfsd3_getaclargs *argp, struct nfsd3_getaclres *resp)
32 struct posix_acl *acl;
37 fh = fh_copy(&resp->fh, &argp->fh);
38 nfserr = fh_verify(rqstp, &resp->fh, 0, NFSD_MAY_NOP);
40 RETURN_STATUS(nfserr);
42 inode = d_inode(fh->fh_dentry);
44 if (argp->mask & ~NFS_ACL_MASK)
45 RETURN_STATUS(nfserr_inval);
46 resp->mask = argp->mask;
48 if (resp->mask & (NFS_ACL|NFS_ACLCNT)) {
49 acl = get_acl(inode, ACL_TYPE_ACCESS);
51 /* Solaris returns the inode's minimum ACL. */
52 acl = posix_acl_from_mode(inode->i_mode, GFP_KERNEL);
55 nfserr = nfserrno(PTR_ERR(acl));
58 resp->acl_access = acl;
60 if (resp->mask & (NFS_DFACL|NFS_DFACLCNT)) {
61 /* Check how Solaris handles requests for the Default ACL
62 of a non-directory! */
63 acl = get_acl(inode, ACL_TYPE_DEFAULT);
65 nfserr = nfserrno(PTR_ERR(acl));
68 resp->acl_default = acl;
71 /* resp->acl_{access,default} are released in nfs3svc_release_getacl. */
75 posix_acl_release(resp->acl_access);
76 posix_acl_release(resp->acl_default);
77 RETURN_STATUS(nfserr);
81 * Set the Access and/or Default ACL of a file.
83 static __be32 nfsd3_proc_setacl(struct svc_rqst * rqstp,
84 struct nfsd3_setaclargs *argp,
85 struct nfsd3_attrstat *resp)
92 fh = fh_copy(&resp->fh, &argp->fh);
93 nfserr = fh_verify(rqstp, &resp->fh, 0, NFSD_MAY_SATTR);
97 inode = d_inode(fh->fh_dentry);
98 if (!IS_POSIXACL(inode) || !inode->i_op->set_acl) {
103 error = fh_want_write(fh);
107 error = inode->i_op->set_acl(inode, argp->acl_access, ACL_TYPE_ACCESS);
110 error = inode->i_op->set_acl(inode, argp->acl_default,
116 nfserr = nfserrno(error);
118 /* argp->acl_{access,default} may have been allocated in
119 nfs3svc_decode_setaclargs. */
120 posix_acl_release(argp->acl_access);
121 posix_acl_release(argp->acl_default);
122 RETURN_STATUS(nfserr);
126 * XDR decode functions
128 static int nfs3svc_decode_getaclargs(struct svc_rqst *rqstp, __be32 *p,
129 struct nfsd3_getaclargs *args)
131 p = nfs3svc_decode_fh(p, &args->fh);
134 args->mask = ntohl(*p); p++;
136 return xdr_argsize_check(rqstp, p);
140 static int nfs3svc_decode_setaclargs(struct svc_rqst *rqstp, __be32 *p,
141 struct nfsd3_setaclargs *args)
143 struct kvec *head = rqstp->rq_arg.head;
147 p = nfs3svc_decode_fh(p, &args->fh);
150 args->mask = ntohl(*p++);
151 if (args->mask & ~NFS_ACL_MASK ||
152 !xdr_argsize_check(rqstp, p))
155 base = (char *)p - (char *)head->iov_base;
156 n = nfsacl_decode(&rqstp->rq_arg, base, NULL,
157 (args->mask & NFS_ACL) ?
158 &args->acl_access : NULL);
160 n = nfsacl_decode(&rqstp->rq_arg, base + n, NULL,
161 (args->mask & NFS_DFACL) ?
162 &args->acl_default : NULL);
167 * XDR encode functions
171 static int nfs3svc_encode_getaclres(struct svc_rqst *rqstp, __be32 *p,
172 struct nfsd3_getaclres *resp)
174 struct dentry *dentry = resp->fh.fh_dentry;
176 p = nfs3svc_encode_post_op_attr(rqstp, p, &resp->fh);
177 if (resp->status == 0 && dentry && d_really_is_positive(dentry)) {
178 struct inode *inode = d_inode(dentry);
179 struct kvec *head = rqstp->rq_res.head;
184 *p++ = htonl(resp->mask);
185 if (!xdr_ressize_check(rqstp, p))
187 base = (char *)p - (char *)head->iov_base;
189 rqstp->rq_res.page_len = w = nfsacl_size(
190 (resp->mask & NFS_ACL) ? resp->acl_access : NULL,
191 (resp->mask & NFS_DFACL) ? resp->acl_default : NULL);
193 if (!*(rqstp->rq_next_page++))
198 n = nfsacl_encode(&rqstp->rq_res, base, inode,
200 resp->mask & NFS_ACL, 0);
202 n = nfsacl_encode(&rqstp->rq_res, base + n, inode,
204 resp->mask & NFS_DFACL,
209 if (!xdr_ressize_check(rqstp, p))
216 static int nfs3svc_encode_setaclres(struct svc_rqst *rqstp, __be32 *p,
217 struct nfsd3_attrstat *resp)
219 p = nfs3svc_encode_post_op_attr(rqstp, p, &resp->fh);
221 return xdr_ressize_check(rqstp, p);
225 * XDR release functions
227 static int nfs3svc_release_getacl(struct svc_rqst *rqstp, __be32 *p,
228 struct nfsd3_getaclres *resp)
231 posix_acl_release(resp->acl_access);
232 posix_acl_release(resp->acl_default);
236 #define nfs3svc_decode_voidargs NULL
237 #define nfs3svc_release_void NULL
238 #define nfsd3_setaclres nfsd3_attrstat
239 #define nfsd3_voidres nfsd3_voidargs
240 struct nfsd3_voidargs { int dummy; };
242 #define PROC(name, argt, rest, relt, cache, respsize) \
243 { (svc_procfunc) nfsd3_proc_##name, \
244 (kxdrproc_t) nfs3svc_decode_##argt##args, \
245 (kxdrproc_t) nfs3svc_encode_##rest##res, \
246 (kxdrproc_t) nfs3svc_release_##relt, \
247 sizeof(struct nfsd3_##argt##args), \
248 sizeof(struct nfsd3_##rest##res), \
254 #define ST 1 /* status*/
255 #define AT 21 /* attributes */
256 #define pAT (1+AT) /* post attributes - conditional */
257 #define ACL (1+NFS_ACL_MAX_ENTRIES*3) /* Access Control List */
259 static struct svc_procedure nfsd_acl_procedures3[] = {
260 PROC(null, void, void, void, RC_NOCACHE, ST),
261 PROC(getacl, getacl, getacl, getacl, RC_NOCACHE, ST+1+2*(1+ACL)),
262 PROC(setacl, setacl, setacl, fhandle, RC_NOCACHE, ST+pAT),
265 struct svc_version nfsd_acl_version3 = {
268 .vs_proc = nfsd_acl_procedures3,
269 .vs_dispatch = nfsd_dispatch,
270 .vs_xdrsize = NFS3_SVC_XDRSIZE,