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-rw-r--r--fs/nfsd/nfs2acl.c336
1 files changed, 336 insertions, 0 deletions
diff --git a/fs/nfsd/nfs2acl.c b/fs/nfsd/nfs2acl.c
new file mode 100644
index 000000000000..7cbf0682b2f0
--- /dev/null
+++ b/fs/nfsd/nfs2acl.c
@@ -0,0 +1,336 @@
1/*
2 * linux/fs/nfsd/nfsacl.c
3 *
4 * Process version 2 NFSACL requests.
5 *
6 * Copyright (C) 2002-2003 Andreas Gruenbacher <agruen@suse.de>
7 */
8
9#include <linux/sunrpc/svc.h>
10#include <linux/nfs.h>
11#include <linux/nfsd/nfsd.h>
12#include <linux/nfsd/cache.h>
13#include <linux/nfsd/xdr.h>
14#include <linux/nfsd/xdr3.h>
15#include <linux/posix_acl.h>
16#include <linux/nfsacl.h>
17
18#define NFSDDBG_FACILITY NFSDDBG_PROC
19#define RETURN_STATUS(st) { resp->status = (st); return (st); }
20
21/*
22 * NULL call.
23 */
24static int
25nfsacld_proc_null(struct svc_rqst *rqstp, void *argp, void *resp)
26{
27 return nfs_ok;
28}
29
30/*
31 * Get the Access and/or Default ACL of a file.
32 */
33static int nfsacld_proc_getacl(struct svc_rqst * rqstp,
34 struct nfsd3_getaclargs *argp, struct nfsd3_getaclres *resp)
35{
36 svc_fh *fh;
37 struct posix_acl *acl;
38 int nfserr = 0;
39
40 dprintk("nfsd: GETACL(2acl) %s\n", SVCFH_fmt(&argp->fh));
41
42 fh = fh_copy(&resp->fh, &argp->fh);
43 if ((nfserr = fh_verify(rqstp, &resp->fh, 0, MAY_NOP)))
44 RETURN_STATUS(nfserr_inval);
45
46 if (argp->mask & ~(NFS_ACL|NFS_ACLCNT|NFS_DFACL|NFS_DFACLCNT))
47 RETURN_STATUS(nfserr_inval);
48 resp->mask = argp->mask;
49
50 if (resp->mask & (NFS_ACL|NFS_ACLCNT)) {
51 acl = nfsd_get_posix_acl(fh, ACL_TYPE_ACCESS);
52 if (IS_ERR(acl)) {
53 int err = PTR_ERR(acl);
54
55 if (err == -ENODATA || err == -EOPNOTSUPP)
56 acl = NULL;
57 else {
58 nfserr = nfserrno(err);
59 goto fail;
60 }
61 }
62 if (acl == NULL) {
63 /* Solaris returns the inode's minimum ACL. */
64
65 struct inode *inode = fh->fh_dentry->d_inode;
66 acl = posix_acl_from_mode(inode->i_mode, GFP_KERNEL);
67 }
68 resp->acl_access = acl;
69 }
70 if (resp->mask & (NFS_DFACL|NFS_DFACLCNT)) {
71 /* Check how Solaris handles requests for the Default ACL
72 of a non-directory! */
73
74 acl = nfsd_get_posix_acl(fh, ACL_TYPE_DEFAULT);
75 if (IS_ERR(acl)) {
76 int err = PTR_ERR(acl);
77
78 if (err == -ENODATA || err == -EOPNOTSUPP)
79 acl = NULL;
80 else {
81 nfserr = nfserrno(err);
82 goto fail;
83 }
84 }
85 resp->acl_default = acl;
86 }
87
88 /* resp->acl_{access,default} are released in nfssvc_release_getacl. */
89 RETURN_STATUS(0);
90
91fail:
92 posix_acl_release(resp->acl_access);
93 posix_acl_release(resp->acl_default);
94 RETURN_STATUS(nfserr);
95}
96
97/*
98 * Set the Access and/or Default ACL of a file.
99 */
100static int nfsacld_proc_setacl(struct svc_rqst * rqstp,
101 struct nfsd3_setaclargs *argp,
102 struct nfsd_attrstat *resp)
103{
104 svc_fh *fh;
105 int nfserr = 0;
106
107 dprintk("nfsd: SETACL(2acl) %s\n", SVCFH_fmt(&argp->fh));
108
109 fh = fh_copy(&resp->fh, &argp->fh);
110 nfserr = fh_verify(rqstp, &resp->fh, 0, MAY_NOP);
111
112 if (!nfserr) {
113 nfserr = nfserrno( nfsd_set_posix_acl(
114 fh, ACL_TYPE_ACCESS, argp->acl_access) );
115 }
116 if (!nfserr) {
117 nfserr = nfserrno( nfsd_set_posix_acl(
118 fh, ACL_TYPE_DEFAULT, argp->acl_default) );
119 }
120
121 /* argp->acl_{access,default} may have been allocated in
122 nfssvc_decode_setaclargs. */
123 posix_acl_release(argp->acl_access);
124 posix_acl_release(argp->acl_default);
125 return nfserr;
126}
127
128/*
129 * Check file attributes
130 */
131static int nfsacld_proc_getattr(struct svc_rqst * rqstp,
132 struct nfsd_fhandle *argp, struct nfsd_attrstat *resp)
133{
134 dprintk("nfsd: GETATTR %s\n", SVCFH_fmt(&argp->fh));
135
136 fh_copy(&resp->fh, &argp->fh);
137 return fh_verify(rqstp, &resp->fh, 0, MAY_NOP);
138}
139
140/*
141 * Check file access
142 */
143static int nfsacld_proc_access(struct svc_rqst *rqstp, struct nfsd3_accessargs *argp,
144 struct nfsd3_accessres *resp)
145{
146 int nfserr;
147
148 dprintk("nfsd: ACCESS(2acl) %s 0x%x\n",
149 SVCFH_fmt(&argp->fh),
150 argp->access);
151
152 fh_copy(&resp->fh, &argp->fh);
153 resp->access = argp->access;
154 nfserr = nfsd_access(rqstp, &resp->fh, &resp->access, NULL);
155 return nfserr;
156}
157
158/*
159 * XDR decode functions
160 */
161static int nfsaclsvc_decode_getaclargs(struct svc_rqst *rqstp, u32 *p,
162 struct nfsd3_getaclargs *argp)
163{
164 if (!(p = nfs2svc_decode_fh(p, &argp->fh)))
165 return 0;
166 argp->mask = ntohl(*p); p++;
167
168 return xdr_argsize_check(rqstp, p);
169}
170
171
172static int nfsaclsvc_decode_setaclargs(struct svc_rqst *rqstp, u32 *p,
173 struct nfsd3_setaclargs *argp)
174{
175 struct kvec *head = rqstp->rq_arg.head;
176 unsigned int base;
177 int n;
178
179 if (!(p = nfs2svc_decode_fh(p, &argp->fh)))
180 return 0;
181 argp->mask = ntohl(*p++);
182 if (argp->mask & ~(NFS_ACL|NFS_ACLCNT|NFS_DFACL|NFS_DFACLCNT) ||
183 !xdr_argsize_check(rqstp, p))
184 return 0;
185
186 base = (char *)p - (char *)head->iov_base;
187 n = nfsacl_decode(&rqstp->rq_arg, base, NULL,
188 (argp->mask & NFS_ACL) ?
189 &argp->acl_access : NULL);
190 if (n > 0)
191 n = nfsacl_decode(&rqstp->rq_arg, base + n, NULL,
192 (argp->mask & NFS_DFACL) ?
193 &argp->acl_default : NULL);
194 return (n > 0);
195}
196
197static int nfsaclsvc_decode_fhandleargs(struct svc_rqst *rqstp, u32 *p,
198 struct nfsd_fhandle *argp)
199{
200 if (!(p = nfs2svc_decode_fh(p, &argp->fh)))
201 return 0;
202 return xdr_argsize_check(rqstp, p);
203}
204
205static int nfsaclsvc_decode_accessargs(struct svc_rqst *rqstp, u32 *p,
206 struct nfsd3_accessargs *argp)
207{
208 if (!(p = nfs2svc_decode_fh(p, &argp->fh)))
209 return 0;
210 argp->access = ntohl(*p++);
211
212 return xdr_argsize_check(rqstp, p);
213}
214
215/*
216 * XDR encode functions
217 */
218
219/* GETACL */
220static int nfsaclsvc_encode_getaclres(struct svc_rqst *rqstp, u32 *p,
221 struct nfsd3_getaclres *resp)
222{
223 struct dentry *dentry = resp->fh.fh_dentry;
224 struct inode *inode = dentry->d_inode;
225 int w = nfsacl_size(
226 (resp->mask & NFS_ACL) ? resp->acl_access : NULL,
227 (resp->mask & NFS_DFACL) ? resp->acl_default : NULL);
228 struct kvec *head = rqstp->rq_res.head;
229 unsigned int base;
230 int n;
231
232 if (dentry == NULL || dentry->d_inode == NULL)
233 return 0;
234 inode = dentry->d_inode;
235
236 p = nfs2svc_encode_fattr(rqstp, p, &resp->fh);
237 *p++ = htonl(resp->mask);
238 if (!xdr_ressize_check(rqstp, p))
239 return 0;
240 base = (char *)p - (char *)head->iov_base;
241
242 rqstp->rq_res.page_len = w;
243 while (w > 0) {
244 if (!svc_take_res_page(rqstp))
245 return 0;
246 w -= PAGE_SIZE;
247 }
248
249 n = nfsacl_encode(&rqstp->rq_res, base, inode,
250 resp->acl_access,
251 resp->mask & NFS_ACL, 0);
252 if (n > 0)
253 n = nfsacl_encode(&rqstp->rq_res, base + n, inode,
254 resp->acl_default,
255 resp->mask & NFS_DFACL,
256 NFS_ACL_DEFAULT);
257 if (n <= 0)
258 return 0;
259 return 1;
260}
261
262static int nfsaclsvc_encode_attrstatres(struct svc_rqst *rqstp, u32 *p,
263 struct nfsd_attrstat *resp)
264{
265 p = nfs2svc_encode_fattr(rqstp, p, &resp->fh);
266 return xdr_ressize_check(rqstp, p);
267}
268
269/* ACCESS */
270static int nfsaclsvc_encode_accessres(struct svc_rqst *rqstp, u32 *p,
271 struct nfsd3_accessres *resp)
272{
273 p = nfs2svc_encode_fattr(rqstp, p, &resp->fh);
274 *p++ = htonl(resp->access);
275 return xdr_ressize_check(rqstp, p);
276}
277
278/*
279 * XDR release functions
280 */
281static int nfsaclsvc_release_getacl(struct svc_rqst *rqstp, u32 *p,
282 struct nfsd3_getaclres *resp)
283{
284 fh_put(&resp->fh);
285 posix_acl_release(resp->acl_access);
286 posix_acl_release(resp->acl_default);
287 return 1;
288}
289
290static int nfsaclsvc_release_fhandle(struct svc_rqst *rqstp, u32 *p,
291 struct nfsd_fhandle *resp)
292{
293 fh_put(&resp->fh);
294 return 1;
295}
296
297#define nfsaclsvc_decode_voidargs NULL
298#define nfsaclsvc_encode_voidres NULL
299#define nfsaclsvc_release_void NULL
300#define nfsd3_fhandleargs nfsd_fhandle
301#define nfsd3_attrstatres nfsd_attrstat
302#define nfsd3_voidres nfsd3_voidargs
303struct nfsd3_voidargs { int dummy; };
304
305#define PROC(name, argt, rest, relt, cache, respsize) \
306 { (svc_procfunc) nfsacld_proc_##name, \
307 (kxdrproc_t) nfsaclsvc_decode_##argt##args, \
308 (kxdrproc_t) nfsaclsvc_encode_##rest##res, \
309 (kxdrproc_t) nfsaclsvc_release_##relt, \
310 sizeof(struct nfsd3_##argt##args), \
311 sizeof(struct nfsd3_##rest##res), \
312 0, \
313 cache, \
314 respsize, \
315 }
316
317#define ST 1 /* status*/
318#define AT 21 /* attributes */
319#define pAT (1+AT) /* post attributes - conditional */
320#define ACL (1+NFS_ACL_MAX_ENTRIES*3) /* Access Control List */
321
322static struct svc_procedure nfsd_acl_procedures2[] = {
323 PROC(null, void, void, void, RC_NOCACHE, ST),
324 PROC(getacl, getacl, getacl, getacl, RC_NOCACHE, ST+1+2*(1+ACL)),
325 PROC(setacl, setacl, attrstat, fhandle, RC_NOCACHE, ST+AT),
326 PROC(getattr, fhandle, attrstat, fhandle, RC_NOCACHE, ST+AT),
327 PROC(access, access, access, fhandle, RC_NOCACHE, ST+AT+1),
328};
329
330struct svc_version nfsd_acl_version2 = {
331 .vs_vers = 2,
332 .vs_nproc = 5,
333 .vs_proc = nfsd_acl_procedures2,
334 .vs_dispatch = nfsd_dispatch,
335 .vs_xdrsize = NFS3_SVC_XDRSIZE,
336};
generated by cgit v1.2.2 (git 2.25.0) at 2024-11-22 13:58:59 -0500