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8#include "nfsd.h"
9
10#include <linux/nfsacl.h>
11#include <linux/gfp.h>
12#include "cache.h"
13#include "xdr3.h"
14#include "vfs.h"
15
16
17
18
19static __be32
20nfsd3_proc_null(struct svc_rqst *rqstp)
21{
22 return rpc_success;
23}
24
25
26
27
28static __be32 nfsd3_proc_getacl(struct svc_rqst *rqstp)
29{
30 struct nfsd3_getaclargs *argp = rqstp->rq_argp;
31 struct nfsd3_getaclres *resp = rqstp->rq_resp;
32 struct posix_acl *acl;
33 struct inode *inode;
34 svc_fh *fh;
35
36 fh = fh_copy(&resp->fh, &argp->fh);
37 resp->status = fh_verify(rqstp, &resp->fh, 0, NFSD_MAY_NOP);
38 if (resp->status != nfs_ok)
39 goto out;
40
41 inode = d_inode(fh->fh_dentry);
42
43 if (argp->mask & ~NFS_ACL_MASK) {
44 resp->status = nfserr_inval;
45 goto out;
46 }
47 resp->mask = argp->mask;
48
49 if (resp->mask & (NFS_ACL|NFS_ACLCNT)) {
50 acl = get_acl(inode, ACL_TYPE_ACCESS);
51 if (acl == NULL) {
52
53 acl = posix_acl_from_mode(inode->i_mode, GFP_KERNEL);
54 }
55 if (IS_ERR(acl)) {
56 resp->status = nfserrno(PTR_ERR(acl));
57 goto fail;
58 }
59 resp->acl_access = acl;
60 }
61 if (resp->mask & (NFS_DFACL|NFS_DFACLCNT)) {
62
63
64 acl = get_acl(inode, ACL_TYPE_DEFAULT);
65 if (IS_ERR(acl)) {
66 resp->status = nfserrno(PTR_ERR(acl));
67 goto fail;
68 }
69 resp->acl_default = acl;
70 }
71
72
73out:
74 return rpc_success;
75
76fail:
77 posix_acl_release(resp->acl_access);
78 posix_acl_release(resp->acl_default);
79 goto out;
80}
81
82
83
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 int error;
92
93 fh = fh_copy(&resp->fh, &argp->fh);
94 resp->status = fh_verify(rqstp, &resp->fh, 0, NFSD_MAY_SATTR);
95 if (resp->status != nfs_ok)
96 goto out;
97
98 inode = d_inode(fh->fh_dentry);
99
100 error = fh_want_write(fh);
101 if (error)
102 goto out_errno;
103
104 fh_lock(fh);
105
106 error = set_posix_acl(inode, ACL_TYPE_ACCESS, argp->acl_access);
107 if (error)
108 goto out_drop_lock;
109 error = set_posix_acl(inode, ACL_TYPE_DEFAULT, argp->acl_default);
110
111out_drop_lock:
112 fh_unlock(fh);
113 fh_drop_write(fh);
114out_errno:
115 resp->status = nfserrno(error);
116out:
117
118
119 posix_acl_release(argp->acl_access);
120 posix_acl_release(argp->acl_default);
121 return rpc_success;
122}
123
124
125
126
127static int nfs3svc_decode_getaclargs(struct svc_rqst *rqstp, __be32 *p)
128{
129 struct nfsd3_getaclargs *args = rqstp->rq_argp;
130
131 p = nfs3svc_decode_fh(p, &args->fh);
132 if (!p)
133 return 0;
134 args->mask = ntohl(*p); p++;
135
136 return xdr_argsize_check(rqstp, p);
137}
138
139
140static int nfs3svc_decode_setaclargs(struct svc_rqst *rqstp, __be32 *p)
141{
142 struct nfsd3_setaclargs *args = rqstp->rq_argp;
143 struct kvec *head = rqstp->rq_arg.head;
144 unsigned int base;
145 int n;
146
147 p = nfs3svc_decode_fh(p, &args->fh);
148 if (!p)
149 return 0;
150 args->mask = ntohl(*p++);
151 if (args->mask & ~NFS_ACL_MASK ||
152 !xdr_argsize_check(rqstp, p))
153 return 0;
154
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);
159 if (n > 0)
160 n = nfsacl_decode(&rqstp->rq_arg, base + n, NULL,
161 (args->mask & NFS_DFACL) ?
162 &args->acl_default : NULL);
163 return (n > 0);
164}
165
166
167
168
169
170
171static int nfs3svc_encode_getaclres(struct svc_rqst *rqstp, __be32 *p)
172{
173 struct nfsd3_getaclres *resp = rqstp->rq_resp;
174 struct dentry *dentry = resp->fh.fh_dentry;
175
176 *p++ = resp->status;
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
217static int nfs3svc_encode_setaclres(struct svc_rqst *rqstp, __be32 *p)
218{
219 struct nfsd3_attrstat *resp = rqstp->rq_resp;
220
221 *p++ = resp->status;
222 p = nfs3svc_encode_post_op_attr(rqstp, p, &resp->fh);
223 return xdr_ressize_check(rqstp, p);
224}
225
226
227
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
238struct nfsd3_voidargs { int dummy; };
239
240#define ST 1
241#define AT 21
242#define pAT (1+AT)
243#define ACL (1+NFS_ACL_MAX_ENTRIES*3)
244
245static const struct svc_procedure nfsd_acl_procedures3[3] = {
246 [ACLPROC3_NULL] = {
247 .pc_func = nfsd3_proc_null,
248 .pc_decode = nfs3svc_decode_voidarg,
249 .pc_encode = nfs3svc_encode_voidres,
250 .pc_argsize = sizeof(struct nfsd3_voidargs),
251 .pc_ressize = sizeof(struct nfsd3_voidargs),
252 .pc_cachetype = RC_NOCACHE,
253 .pc_xdrressize = ST,
254 },
255 [ACLPROC3_GETACL] = {
256 .pc_func = nfsd3_proc_getacl,
257 .pc_decode = nfs3svc_decode_getaclargs,
258 .pc_encode = nfs3svc_encode_getaclres,
259 .pc_release = nfs3svc_release_getacl,
260 .pc_argsize = sizeof(struct nfsd3_getaclargs),
261 .pc_ressize = sizeof(struct nfsd3_getaclres),
262 .pc_cachetype = RC_NOCACHE,
263 .pc_xdrressize = ST+1+2*(1+ACL),
264 },
265 [ACLPROC3_SETACL] = {
266 .pc_func = nfsd3_proc_setacl,
267 .pc_decode = nfs3svc_decode_setaclargs,
268 .pc_encode = nfs3svc_encode_setaclres,
269 .pc_release = nfs3svc_release_fhandle,
270 .pc_argsize = sizeof(struct nfsd3_setaclargs),
271 .pc_ressize = sizeof(struct nfsd3_attrstat),
272 .pc_cachetype = RC_NOCACHE,
273 .pc_xdrressize = ST+pAT,
274 },
275};
276
277static unsigned int nfsd_acl_count3[ARRAY_SIZE(nfsd_acl_procedures3)];
278const struct svc_version nfsd_acl_version3 = {
279 .vs_vers = 3,
280 .vs_nproc = 3,
281 .vs_proc = nfsd_acl_procedures3,
282 .vs_count = nfsd_acl_count3,
283 .vs_dispatch = nfsd_dispatch,
284 .vs_xdrsize = NFS3_SVC_XDRSIZE,
285};
286
287
