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1/*
2 * Process version 3 NFSACL requests.
3 *
4 * Copyright (C) 2002-2003 Andreas Gruenbacher <agruen@suse.de>
5 */
6
7#include "nfsd.h"
8/* FIXME: nfsacl.h is a broken header */
9#include <linux/nfsacl.h>
10#include <linux/gfp.h>
11#include "cache.h"
12#include "xdr3.h"
13#include "vfs.h"
14
15#define RETURN_STATUS(st) { resp->status = (st); return (st); }
16
17/*
18 * NULL call.
19 */
20static __be32
21nfsd3_proc_null(struct svc_rqst *rqstp, void *argp, void *resp)
22{
23 return nfs_ok;
24}
25
26/*
27 * Get the Access and/or Default ACL of a file.
28 */
29static __be32 nfsd3_proc_getacl(struct svc_rqst * rqstp,
30 struct nfsd3_getaclargs *argp, struct nfsd3_getaclres *resp)
31{
32 struct posix_acl *acl;
33 struct inode *inode;
34 svc_fh *fh;
35 __be32 nfserr = 0;
36
37 fh = fh_copy(&resp->fh, &argp->fh);
38 nfserr = fh_verify(rqstp, &resp->fh, 0, NFSD_MAY_NOP);
39 if (nfserr)
40 RETURN_STATUS(nfserr);
41
42 inode = d_inode(fh->fh_dentry);
43
44 if (argp->mask & ~NFS_ACL_MASK)
45 RETURN_STATUS(nfserr_inval);
46 resp->mask = argp->mask;
47
48 if (resp->mask & (NFS_ACL|NFS_ACLCNT)) {
49 acl = get_acl(inode, ACL_TYPE_ACCESS);
50 if (acl == NULL) {
51 /* Solaris returns the inode's minimum ACL. */
52 acl = posix_acl_from_mode(inode->i_mode, GFP_KERNEL);
53 }
54 if (IS_ERR(acl)) {
55 nfserr = nfserrno(PTR_ERR(acl));
56 goto fail;
57 }
58 resp->acl_access = acl;
59 }
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);
64 if (IS_ERR(acl)) {
65 nfserr = nfserrno(PTR_ERR(acl));
66 goto fail;
67 }
68 resp->acl_default = acl;
69 }
70
71 /* resp->acl_{access,default} are released in nfs3svc_release_getacl. */
72 RETURN_STATUS(0);
73
74fail:
75 posix_acl_release(resp->acl_access);
76 posix_acl_release(resp->acl_default);
77 RETURN_STATUS(nfserr);
78}
79
80/*
81 * Set the Access and/or Default ACL of a file.
82 */
83static __be32 nfsd3_proc_setacl(struct svc_rqst * rqstp,
84 struct nfsd3_setaclargs *argp,
85 struct nfsd3_attrstat *resp)
86{
87 struct inode *inode;
88 svc_fh *fh;
89 __be32 nfserr = 0;
90 int error;
91
92 fh = fh_copy(&resp->fh, &argp->fh);
93 nfserr = fh_verify(rqstp, &resp->fh, 0, NFSD_MAY_SATTR);
94 if (nfserr)
95 goto out;
96
97 inode = d_inode(fh->fh_dentry);
98
99 error = fh_want_write(fh);
100 if (error)
101 goto out_errno;
102
103 fh_lock(fh);
104
105 error = set_posix_acl(inode, ACL_TYPE_ACCESS, argp->acl_access);
106 if (error)
107 goto out_drop_lock;
108 error = set_posix_acl(inode, ACL_TYPE_DEFAULT, argp->acl_default);
109
110out_drop_lock:
111 fh_unlock(fh);
112 fh_drop_write(fh);
113out_errno:
114 nfserr = nfserrno(error);
115out:
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);
121}
122
123/*
124 * XDR decode functions
125 */
126static int nfs3svc_decode_getaclargs(struct svc_rqst *rqstp, __be32 *p,
127 struct nfsd3_getaclargs *args)
128{
129 p = nfs3svc_decode_fh(p, &args->fh);
130 if (!p)
131 return 0;
132 args->mask = ntohl(*p); p++;
133
134 return xdr_argsize_check(rqstp, p);
135}
136
137
138static int nfs3svc_decode_setaclargs(struct svc_rqst *rqstp, __be32 *p,
139 struct nfsd3_setaclargs *args)
140{
141 struct kvec *head = rqstp->rq_arg.head;
142 unsigned int base;
143 int n;
144
145 p = nfs3svc_decode_fh(p, &args->fh);
146 if (!p)
147 return 0;
148 args->mask = ntohl(*p++);
149 if (args->mask & ~NFS_ACL_MASK ||
150 !xdr_argsize_check(rqstp, p))
151 return 0;
152
153 base = (char *)p - (char *)head->iov_base;
154 n = nfsacl_decode(&rqstp->rq_arg, base, NULL,
155 (args->mask & NFS_ACL) ?
156 &args->acl_access : NULL);
157 if (n > 0)
158 n = nfsacl_decode(&rqstp->rq_arg, base + n, NULL,
159 (args->mask & NFS_DFACL) ?
160 &args->acl_default : NULL);
161 return (n > 0);
162}
163
164/*
165 * XDR encode functions
166 */
167
168/* GETACL */
169static int nfs3svc_encode_getaclres(struct svc_rqst *rqstp, __be32 *p,
170 struct nfsd3_getaclres *resp)
171{
172 struct dentry *dentry = resp->fh.fh_dentry;
173
174 p = nfs3svc_encode_post_op_attr(rqstp, p, &resp->fh);
175 if (resp->status == 0 && dentry && d_really_is_positive(dentry)) {
176 struct inode *inode = d_inode(dentry);
177 struct kvec *head = rqstp->rq_res.head;
178 unsigned int base;
179 int n;
180 int w;
181
182 *p++ = htonl(resp->mask);
183 if (!xdr_ressize_check(rqstp, p))
184 return 0;
185 base = (char *)p - (char *)head->iov_base;
186
187 rqstp->rq_res.page_len = w = nfsacl_size(
188 (resp->mask & NFS_ACL) ? resp->acl_access : NULL,
189 (resp->mask & NFS_DFACL) ? resp->acl_default : NULL);
190 while (w > 0) {
191 if (!*(rqstp->rq_next_page++))
192 return 0;
193 w -= PAGE_SIZE;
194 }
195
196 n = nfsacl_encode(&rqstp->rq_res, base, inode,
197 resp->acl_access,
198 resp->mask & NFS_ACL, 0);
199 if (n > 0)
200 n = nfsacl_encode(&rqstp->rq_res, base + n, inode,
201 resp->acl_default,
202 resp->mask & NFS_DFACL,
203 NFS_ACL_DEFAULT);
204 if (n <= 0)
205 return 0;
206 } else
207 if (!xdr_ressize_check(rqstp, p))
208 return 0;
209
210 return 1;
211}
212
213/* SETACL */
214static int nfs3svc_encode_setaclres(struct svc_rqst *rqstp, __be32 *p,
215 struct nfsd3_attrstat *resp)
216{
217 p = nfs3svc_encode_post_op_attr(rqstp, p, &resp->fh);
218
219 return xdr_ressize_check(rqstp, p);
220}
221
222/*
223 * XDR release functions
224 */
225static int nfs3svc_release_getacl(struct svc_rqst *rqstp, __be32 *p,
226 struct nfsd3_getaclres *resp)
227{
228 fh_put(&resp->fh);
229 posix_acl_release(resp->acl_access);
230 posix_acl_release(resp->acl_default);
231 return 1;
232}
233
234#define nfs3svc_decode_voidargs NULL
235#define nfs3svc_release_void NULL
236#define nfsd3_setaclres nfsd3_attrstat
237#define nfsd3_voidres nfsd3_voidargs
238struct nfsd3_voidargs { int dummy; };
239
240#define PROC(name, argt, rest, relt, cache, respsize) \
241 { (svc_procfunc) nfsd3_proc_##name, \
242 (kxdrproc_t) nfs3svc_decode_##argt##args, \
243 (kxdrproc_t) nfs3svc_encode_##rest##res, \
244 (kxdrproc_t) nfs3svc_release_##relt, \
245 sizeof(struct nfsd3_##argt##args), \
246 sizeof(struct nfsd3_##rest##res), \
247 0, \
248 cache, \
249 respsize, \
250 }
251
252#define ST 1 /* status*/
253#define AT 21 /* attributes */
254#define pAT (1+AT) /* post attributes - conditional */
255#define ACL (1+NFS_ACL_MAX_ENTRIES*3) /* Access Control List */
256
257static struct svc_procedure nfsd_acl_procedures3[] = {
258 PROC(null, void, void, void, RC_NOCACHE, ST),
259 PROC(getacl, getacl, getacl, getacl, RC_NOCACHE, ST+1+2*(1+ACL)),
260 PROC(setacl, setacl, setacl, fhandle, RC_NOCACHE, ST+pAT),
261};
262
263struct svc_version nfsd_acl_version3 = {
264 .vs_vers = 3,
265 .vs_nproc = 3,
266 .vs_proc = nfsd_acl_procedures3,
267 .vs_dispatch = nfsd_dispatch,
268 .vs_xdrsize = NFS3_SVC_XDRSIZE,
269 .vs_hidden = 0,
270};
271
1// SPDX-License-Identifier: GPL-2.0
2/*
3 * Process version 3 NFSACL requests.
4 *
5 * Copyright (C) 2002-2003 Andreas Gruenbacher <agruen@suse.de>
6 */
7
8#include "nfsd.h"
9/* FIXME: nfsacl.h is a broken header */
10#include <linux/nfsacl.h>
11#include <linux/gfp.h>
12#include "cache.h"
13#include "xdr3.h"
14#include "vfs.h"
15
16#define RETURN_STATUS(st) { resp->status = (st); return (st); }
17
18/*
19 * NULL call.
20 */
21static __be32
22nfsd3_proc_null(struct svc_rqst *rqstp)
23{
24 return nfs_ok;
25}
26
27/*
28 * Get the Access and/or Default ACL of a file.
29 */
30static __be32 nfsd3_proc_getacl(struct svc_rqst *rqstp)
31{
32 struct nfsd3_getaclargs *argp = rqstp->rq_argp;
33 struct nfsd3_getaclres *resp = rqstp->rq_resp;
34 struct posix_acl *acl;
35 struct inode *inode;
36 svc_fh *fh;
37 __be32 nfserr = 0;
38
39 fh = fh_copy(&resp->fh, &argp->fh);
40 nfserr = fh_verify(rqstp, &resp->fh, 0, NFSD_MAY_NOP);
41 if (nfserr)
42 RETURN_STATUS(nfserr);
43
44 inode = d_inode(fh->fh_dentry);
45
46 if (argp->mask & ~NFS_ACL_MASK)
47 RETURN_STATUS(nfserr_inval);
48 resp->mask = argp->mask;
49
50 if (resp->mask & (NFS_ACL|NFS_ACLCNT)) {
51 acl = get_acl(inode, ACL_TYPE_ACCESS);
52 if (acl == NULL) {
53 /* Solaris returns the inode's minimum ACL. */
54 acl = posix_acl_from_mode(inode->i_mode, GFP_KERNEL);
55 }
56 if (IS_ERR(acl)) {
57 nfserr = nfserrno(PTR_ERR(acl));
58 goto fail;
59 }
60 resp->acl_access = acl;
61 }
62 if (resp->mask & (NFS_DFACL|NFS_DFACLCNT)) {
63 /* Check how Solaris handles requests for the Default ACL
64 of a non-directory! */
65 acl = get_acl(inode, ACL_TYPE_DEFAULT);
66 if (IS_ERR(acl)) {
67 nfserr = nfserrno(PTR_ERR(acl));
68 goto fail;
69 }
70 resp->acl_default = acl;
71 }
72
73 /* resp->acl_{access,default} are released in nfs3svc_release_getacl. */
74 RETURN_STATUS(0);
75
76fail:
77 posix_acl_release(resp->acl_access);
78 posix_acl_release(resp->acl_default);
79 RETURN_STATUS(nfserr);
80}
81
82/*
83 * Set the Access and/or Default ACL of a file.
84 */
85static __be32 nfsd3_proc_setacl(struct svc_rqst *rqstp)
86{
87 struct nfsd3_setaclargs *argp = rqstp->rq_argp;
88 struct nfsd3_attrstat *resp = rqstp->rq_resp;
89 struct inode *inode;
90 svc_fh *fh;
91 __be32 nfserr = 0;
92 int error;
93
94 fh = fh_copy(&resp->fh, &argp->fh);
95 nfserr = fh_verify(rqstp, &resp->fh, 0, NFSD_MAY_SATTR);
96 if (nfserr)
97 goto out;
98
99 inode = d_inode(fh->fh_dentry);
100
101 error = fh_want_write(fh);
102 if (error)
103 goto out_errno;
104
105 fh_lock(fh);
106
107 error = set_posix_acl(inode, ACL_TYPE_ACCESS, argp->acl_access);
108 if (error)
109 goto out_drop_lock;
110 error = set_posix_acl(inode, ACL_TYPE_DEFAULT, argp->acl_default);
111
112out_drop_lock:
113 fh_unlock(fh);
114 fh_drop_write(fh);
115out_errno:
116 nfserr = nfserrno(error);
117out:
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);
123}
124
125/*
126 * XDR decode functions
127 */
128static int nfs3svc_decode_getaclargs(struct svc_rqst *rqstp, __be32 *p)
129{
130 struct nfsd3_getaclargs *args = rqstp->rq_argp;
131
132 p = nfs3svc_decode_fh(p, &args->fh);
133 if (!p)
134 return 0;
135 args->mask = ntohl(*p); p++;
136
137 return xdr_argsize_check(rqstp, p);
138}
139
140
141static int nfs3svc_decode_setaclargs(struct svc_rqst *rqstp, __be32 *p)
142{
143 struct nfsd3_setaclargs *args = rqstp->rq_argp;
144 struct kvec *head = rqstp->rq_arg.head;
145 unsigned int base;
146 int n;
147
148 p = nfs3svc_decode_fh(p, &args->fh);
149 if (!p)
150 return 0;
151 args->mask = ntohl(*p++);
152 if (args->mask & ~NFS_ACL_MASK ||
153 !xdr_argsize_check(rqstp, p))
154 return 0;
155
156 base = (char *)p - (char *)head->iov_base;
157 n = nfsacl_decode(&rqstp->rq_arg, base, NULL,
158 (args->mask & NFS_ACL) ?
159 &args->acl_access : NULL);
160 if (n > 0)
161 n = nfsacl_decode(&rqstp->rq_arg, base + n, NULL,
162 (args->mask & NFS_DFACL) ?
163 &args->acl_default : NULL);
164 return (n > 0);
165}
166
167/*
168 * XDR encode functions
169 */
170
171/* GETACL */
172static int nfs3svc_encode_getaclres(struct svc_rqst *rqstp, __be32 *p)
173{
174 struct nfsd3_getaclres *resp = rqstp->rq_resp;
175 struct dentry *dentry = resp->fh.fh_dentry;
176
177 p = nfs3svc_encode_post_op_attr(rqstp, p, &resp->fh);
178 if (resp->status == 0 && dentry && d_really_is_positive(dentry)) {
179 struct inode *inode = d_inode(dentry);
180 struct kvec *head = rqstp->rq_res.head;
181 unsigned int base;
182 int n;
183 int w;
184
185 *p++ = htonl(resp->mask);
186 if (!xdr_ressize_check(rqstp, p))
187 return 0;
188 base = (char *)p - (char *)head->iov_base;
189
190 rqstp->rq_res.page_len = w = nfsacl_size(
191 (resp->mask & NFS_ACL) ? resp->acl_access : NULL,
192 (resp->mask & NFS_DFACL) ? resp->acl_default : NULL);
193 while (w > 0) {
194 if (!*(rqstp->rq_next_page++))
195 return 0;
196 w -= PAGE_SIZE;
197 }
198
199 n = nfsacl_encode(&rqstp->rq_res, base, inode,
200 resp->acl_access,
201 resp->mask & NFS_ACL, 0);
202 if (n > 0)
203 n = nfsacl_encode(&rqstp->rq_res, base + n, inode,
204 resp->acl_default,
205 resp->mask & NFS_DFACL,
206 NFS_ACL_DEFAULT);
207 if (n <= 0)
208 return 0;
209 } else
210 if (!xdr_ressize_check(rqstp, p))
211 return 0;
212
213 return 1;
214}
215
216/* SETACL */
217static int nfs3svc_encode_setaclres(struct svc_rqst *rqstp, __be32 *p)
218{
219 struct nfsd3_attrstat *resp = rqstp->rq_resp;
220
221 p = nfs3svc_encode_post_op_attr(rqstp, p, &resp->fh);
222
223 return xdr_ressize_check(rqstp, p);
224}
225
226/*
227 * XDR release functions
228 */
229static void nfs3svc_release_getacl(struct svc_rqst *rqstp)
230{
231 struct nfsd3_getaclres *resp = rqstp->rq_resp;
232
233 fh_put(&resp->fh);
234 posix_acl_release(resp->acl_access);
235 posix_acl_release(resp->acl_default);
236}
237
238#define nfs3svc_decode_voidargs NULL
239#define nfs3svc_release_void NULL
240#define nfsd3_setaclres nfsd3_attrstat
241#define nfsd3_voidres nfsd3_voidargs
242struct nfsd3_voidargs { int dummy; };
243
244#define PROC(name, argt, rest, relt, cache, respsize) \
245{ \
246 .pc_func = nfsd3_proc_##name, \
247 .pc_decode = nfs3svc_decode_##argt##args, \
248 .pc_encode = nfs3svc_encode_##rest##res, \
249 .pc_release = nfs3svc_release_##relt, \
250 .pc_argsize = sizeof(struct nfsd3_##argt##args), \
251 .pc_ressize = sizeof(struct nfsd3_##rest##res), \
252 .pc_cachetype = cache, \
253 .pc_xdrressize = respsize, \
254}
255
256#define ST 1 /* status*/
257#define AT 21 /* attributes */
258#define pAT (1+AT) /* post attributes - conditional */
259#define ACL (1+NFS_ACL_MAX_ENTRIES*3) /* Access Control List */
260
261static const struct svc_procedure nfsd_acl_procedures3[] = {
262 PROC(null, void, void, void, RC_NOCACHE, ST),
263 PROC(getacl, getacl, getacl, getacl, RC_NOCACHE, ST+1+2*(1+ACL)),
264 PROC(setacl, setacl, setacl, fhandle, RC_NOCACHE, ST+pAT),
265};
266
267static unsigned int nfsd_acl_count3[ARRAY_SIZE(nfsd_acl_procedures3)];
268const struct svc_version nfsd_acl_version3 = {
269 .vs_vers = 3,
270 .vs_nproc = 3,
271 .vs_proc = nfsd_acl_procedures3,
272 .vs_count = nfsd_acl_count3,
273 .vs_dispatch = nfsd_dispatch,
274 .vs_xdrsize = NFS3_SVC_XDRSIZE,
275};
276