This source file includes following definitions.
- nfsd3_proc_null
- nfsd3_proc_getacl
- nfsd3_proc_setacl
- nfs3svc_decode_getaclargs
- nfs3svc_decode_setaclargs
- nfs3svc_encode_getaclres
- nfs3svc_encode_setaclres
- nfs3svc_release_getacl
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7
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 #define RETURN_STATUS(st) { resp->status = (st); return (st); }
17
18
19
20
21 static __be32
22 nfsd3_proc_null(struct svc_rqst *rqstp)
23 {
24 return nfs_ok;
25 }
26
27
28
29
30 static __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
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
64
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
74 RETURN_STATUS(0);
75
76 fail:
77 posix_acl_release(resp->acl_access);
78 posix_acl_release(resp->acl_default);
79 RETURN_STATUS(nfserr);
80 }
81
82
83
84
85 static __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
112 out_drop_lock:
113 fh_unlock(fh);
114 fh_drop_write(fh);
115 out_errno:
116 nfserr = nfserrno(error);
117 out:
118
119
120 posix_acl_release(argp->acl_access);
121 posix_acl_release(argp->acl_default);
122 RETURN_STATUS(nfserr);
123 }
124
125
126
127
128 static 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
141 static 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
169
170
171
172 static 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
217 static 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
228
229 static 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
242 struct 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
257 #define AT 21
258 #define pAT (1+AT)
259 #define ACL (1+NFS_ACL_MAX_ENTRIES*3)
260
261 static 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
267 static unsigned int nfsd_acl_count3[ARRAY_SIZE(nfsd_acl_procedures3)];
268 const 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