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>
18 #define RETURN_STATUS(st) { resp->status = (st); return (st); }
24 nfsd3_proc_null(struct svc_rqst *rqstp, void *argp, void *resp)
30 * Get the Access and/or Default ACL of a file.
32 static __be32 nfsd3_proc_getacl(struct svc_rqst * rqstp,
33 struct nfsd3_getaclargs *argp, struct nfsd3_getaclres *resp)
36 struct posix_acl *acl;
39 fh = fh_copy(&resp->fh, &argp->fh);
40 nfserr = fh_verify(rqstp, &resp->fh, 0, NFSD_MAY_NOP);
42 RETURN_STATUS(nfserr);
44 if (argp->mask & ~(NFS_ACL|NFS_ACLCNT|NFS_DFACL|NFS_DFACLCNT))
45 RETURN_STATUS(nfserr_inval);
46 resp->mask = argp->mask;
48 if (resp->mask & (NFS_ACL|NFS_ACLCNT)) {
49 acl = nfsd_get_posix_acl(fh, ACL_TYPE_ACCESS);
51 int err = PTR_ERR(acl);
53 if (err == -ENODATA || err == -EOPNOTSUPP)
56 nfserr = nfserrno(err);
61 /* Solaris returns the inode's minimum ACL. */
63 struct inode *inode = fh->fh_dentry->d_inode;
64 acl = posix_acl_from_mode(inode->i_mode, GFP_KERNEL);
66 resp->acl_access = acl;
68 if (resp->mask & (NFS_DFACL|NFS_DFACLCNT)) {
69 /* Check how Solaris handles requests for the Default ACL
70 of a non-directory! */
72 acl = nfsd_get_posix_acl(fh, ACL_TYPE_DEFAULT);
74 int err = PTR_ERR(acl);
76 if (err == -ENODATA || err == -EOPNOTSUPP)
79 nfserr = nfserrno(err);
83 resp->acl_default = acl;
86 /* resp->acl_{access,default} are released in nfs3svc_release_getacl. */
90 posix_acl_release(resp->acl_access);
91 posix_acl_release(resp->acl_default);
92 RETURN_STATUS(nfserr);
96 * Set the Access and/or Default ACL of a file.
98 static __be32 nfsd3_proc_setacl(struct svc_rqst * rqstp,
99 struct nfsd3_setaclargs *argp,
100 struct nfsd3_attrstat *resp)
105 fh = fh_copy(&resp->fh, &argp->fh);
106 nfserr = fh_verify(rqstp, &resp->fh, 0, NFSD_MAY_SATTR);
109 nfserr = nfserrno( nfsd_set_posix_acl(
110 fh, ACL_TYPE_ACCESS, argp->acl_access) );
113 nfserr = nfserrno( nfsd_set_posix_acl(
114 fh, ACL_TYPE_DEFAULT, argp->acl_default) );
117 /* argp->acl_{access,default} may have been allocated in
118 nfs3svc_decode_setaclargs. */
119 posix_acl_release(argp->acl_access);
120 posix_acl_release(argp->acl_default);
121 RETURN_STATUS(nfserr);
125 * XDR decode functions
127 static int nfs3svc_decode_getaclargs(struct svc_rqst *rqstp, __be32 *p,
128 struct nfsd3_getaclargs *args)
130 if (!(p = nfs3svc_decode_fh(p, &args->fh)))
132 args->mask = ntohl(*p); p++;
134 return xdr_argsize_check(rqstp, p);
138 static int nfs3svc_decode_setaclargs(struct svc_rqst *rqstp, __be32 *p,
139 struct nfsd3_setaclargs *args)
141 struct kvec *head = rqstp->rq_arg.head;
145 if (!(p = nfs3svc_decode_fh(p, &args->fh)))
147 args->mask = ntohl(*p++);
148 if (args->mask & ~(NFS_ACL|NFS_ACLCNT|NFS_DFACL|NFS_DFACLCNT) ||
149 !xdr_argsize_check(rqstp, p))
152 base = (char *)p - (char *)head->iov_base;
153 n = nfsacl_decode(&rqstp->rq_arg, base, NULL,
154 (args->mask & NFS_ACL) ?
155 &args->acl_access : NULL);
157 n = nfsacl_decode(&rqstp->rq_arg, base + n, NULL,
158 (args->mask & NFS_DFACL) ?
159 &args->acl_default : NULL);
164 * XDR encode functions
168 static int nfs3svc_encode_getaclres(struct svc_rqst *rqstp, __be32 *p,
169 struct nfsd3_getaclres *resp)
171 struct dentry *dentry = resp->fh.fh_dentry;
173 p = nfs3svc_encode_post_op_attr(rqstp, p, &resp->fh);
174 if (resp->status == 0 && dentry && dentry->d_inode) {
175 struct inode *inode = dentry->d_inode;
176 struct kvec *head = rqstp->rq_res.head;
181 *p++ = htonl(resp->mask);
182 if (!xdr_ressize_check(rqstp, p))
184 base = (char *)p - (char *)head->iov_base;
186 rqstp->rq_res.page_len = w = nfsacl_size(
187 (resp->mask & NFS_ACL) ? resp->acl_access : NULL,
188 (resp->mask & NFS_DFACL) ? resp->acl_default : NULL);
190 if (!rqstp->rq_respages[rqstp->rq_resused++])
195 n = nfsacl_encode(&rqstp->rq_res, base, inode,
197 resp->mask & NFS_ACL, 0);
199 n = nfsacl_encode(&rqstp->rq_res, base + n, inode,
201 resp->mask & NFS_DFACL,
206 if (!xdr_ressize_check(rqstp, p))
213 static int nfs3svc_encode_setaclres(struct svc_rqst *rqstp, __be32 *p,
214 struct nfsd3_attrstat *resp)
216 p = nfs3svc_encode_post_op_attr(rqstp, p, &resp->fh);
218 return xdr_ressize_check(rqstp, p);
222 * XDR release functions
224 static int nfs3svc_release_getacl(struct svc_rqst *rqstp, __be32 *p,
225 struct nfsd3_getaclres *resp)
228 posix_acl_release(resp->acl_access);
229 posix_acl_release(resp->acl_default);
233 #define nfs3svc_decode_voidargs NULL
234 #define nfs3svc_release_void NULL
235 #define nfsd3_setaclres nfsd3_attrstat
236 #define nfsd3_voidres nfsd3_voidargs
237 struct nfsd3_voidargs { int dummy; };
239 #define PROC(name, argt, rest, relt, cache, respsize) \
240 { (svc_procfunc) nfsd3_proc_##name, \
241 (kxdrproc_t) nfs3svc_decode_##argt##args, \
242 (kxdrproc_t) nfs3svc_encode_##rest##res, \
243 (kxdrproc_t) nfs3svc_release_##relt, \
244 sizeof(struct nfsd3_##argt##args), \
245 sizeof(struct nfsd3_##rest##res), \
251 #define ST 1 /* status*/
252 #define AT 21 /* attributes */
253 #define pAT (1+AT) /* post attributes - conditional */
254 #define ACL (1+NFS_ACL_MAX_ENTRIES*3) /* Access Control List */
256 static struct svc_procedure nfsd_acl_procedures3[] = {
257 PROC(null, void, void, void, RC_NOCACHE, ST),
258 PROC(getacl, getacl, getacl, getacl, RC_NOCACHE, ST+1+2*(1+ACL)),
259 PROC(setacl, setacl, setacl, fhandle, RC_NOCACHE, ST+pAT),
262 struct svc_version nfsd_acl_version3 = {
265 .vs_proc = nfsd_acl_procedures3,
266 .vs_dispatch = nfsd_dispatch,
267 .vs_xdrsize = NFS3_SVC_XDRSIZE,