Commit | Line | Data |
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a257cdd0 AG |
1 | /* |
2 | * linux/fs/nfsd/nfs3acl.c | |
3 | * | |
4 | * Process version 3 NFSACL requests. | |
5 | * | |
6 | * Copyright (C) 2002-2003 Andreas Gruenbacher <agruen@suse.de> | |
7 | */ | |
8 | ||
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> | |
16 | ||
17 | #define RETURN_STATUS(st) { resp->status = (st); return (st); } | |
18 | ||
19 | /* | |
20 | * NULL call. | |
21 | */ | |
7111c66e | 22 | static __be32 |
a257cdd0 AG |
23 | nfsd3_proc_null(struct svc_rqst *rqstp, void *argp, void *resp) |
24 | { | |
25 | return nfs_ok; | |
26 | } | |
27 | ||
28 | /* | |
29 | * Get the Access and/or Default ACL of a file. | |
30 | */ | |
7111c66e | 31 | static __be32 nfsd3_proc_getacl(struct svc_rqst * rqstp, |
a257cdd0 AG |
32 | struct nfsd3_getaclargs *argp, struct nfsd3_getaclres *resp) |
33 | { | |
34 | svc_fh *fh; | |
35 | struct posix_acl *acl; | |
c4d987ba | 36 | __be32 nfserr = 0; |
a257cdd0 AG |
37 | |
38 | fh = fh_copy(&resp->fh, &argp->fh); | |
39 | if ((nfserr = fh_verify(rqstp, &resp->fh, 0, MAY_NOP))) | |
ac8587dc | 40 | RETURN_STATUS(nfserr); |
a257cdd0 AG |
41 | |
42 | if (argp->mask & ~(NFS_ACL|NFS_ACLCNT|NFS_DFACL|NFS_DFACLCNT)) | |
43 | RETURN_STATUS(nfserr_inval); | |
44 | resp->mask = argp->mask; | |
45 | ||
46 | if (resp->mask & (NFS_ACL|NFS_ACLCNT)) { | |
47 | acl = nfsd_get_posix_acl(fh, ACL_TYPE_ACCESS); | |
48 | if (IS_ERR(acl)) { | |
49 | int err = PTR_ERR(acl); | |
50 | ||
51 | if (err == -ENODATA || err == -EOPNOTSUPP) | |
52 | acl = NULL; | |
53 | else { | |
54 | nfserr = nfserrno(err); | |
55 | goto fail; | |
56 | } | |
57 | } | |
58 | if (acl == NULL) { | |
59 | /* Solaris returns the inode's minimum ACL. */ | |
60 | ||
61 | struct inode *inode = fh->fh_dentry->d_inode; | |
62 | acl = posix_acl_from_mode(inode->i_mode, GFP_KERNEL); | |
63 | } | |
64 | resp->acl_access = acl; | |
65 | } | |
66 | if (resp->mask & (NFS_DFACL|NFS_DFACLCNT)) { | |
67 | /* Check how Solaris handles requests for the Default ACL | |
68 | of a non-directory! */ | |
69 | ||
70 | acl = nfsd_get_posix_acl(fh, ACL_TYPE_DEFAULT); | |
71 | if (IS_ERR(acl)) { | |
72 | int err = PTR_ERR(acl); | |
73 | ||
74 | if (err == -ENODATA || err == -EOPNOTSUPP) | |
75 | acl = NULL; | |
76 | else { | |
77 | nfserr = nfserrno(err); | |
78 | goto fail; | |
79 | } | |
80 | } | |
81 | resp->acl_default = acl; | |
82 | } | |
83 | ||
84 | /* resp->acl_{access,default} are released in nfs3svc_release_getacl. */ | |
85 | RETURN_STATUS(0); | |
86 | ||
87 | fail: | |
88 | posix_acl_release(resp->acl_access); | |
89 | posix_acl_release(resp->acl_default); | |
90 | RETURN_STATUS(nfserr); | |
91 | } | |
92 | ||
93 | /* | |
94 | * Set the Access and/or Default ACL of a file. | |
95 | */ | |
7111c66e | 96 | static __be32 nfsd3_proc_setacl(struct svc_rqst * rqstp, |
a257cdd0 AG |
97 | struct nfsd3_setaclargs *argp, |
98 | struct nfsd3_attrstat *resp) | |
99 | { | |
100 | svc_fh *fh; | |
c4d987ba | 101 | __be32 nfserr = 0; |
a257cdd0 AG |
102 | |
103 | fh = fh_copy(&resp->fh, &argp->fh); | |
b7964c3d | 104 | nfserr = fh_verify(rqstp, &resp->fh, 0, MAY_SATTR); |
a257cdd0 AG |
105 | |
106 | if (!nfserr) { | |
107 | nfserr = nfserrno( nfsd_set_posix_acl( | |
108 | fh, ACL_TYPE_ACCESS, argp->acl_access) ); | |
109 | } | |
110 | if (!nfserr) { | |
111 | nfserr = nfserrno( nfsd_set_posix_acl( | |
112 | fh, ACL_TYPE_DEFAULT, argp->acl_default) ); | |
113 | } | |
114 | ||
115 | /* argp->acl_{access,default} may have been allocated in | |
116 | nfs3svc_decode_setaclargs. */ | |
117 | posix_acl_release(argp->acl_access); | |
118 | posix_acl_release(argp->acl_default); | |
119 | RETURN_STATUS(nfserr); | |
120 | } | |
121 | ||
122 | /* | |
123 | * XDR decode functions | |
124 | */ | |
91f07168 | 125 | static int nfs3svc_decode_getaclargs(struct svc_rqst *rqstp, __be32 *p, |
a257cdd0 AG |
126 | struct nfsd3_getaclargs *args) |
127 | { | |
128 | if (!(p = nfs3svc_decode_fh(p, &args->fh))) | |
129 | return 0; | |
130 | args->mask = ntohl(*p); p++; | |
131 | ||
132 | return xdr_argsize_check(rqstp, p); | |
133 | } | |
134 | ||
135 | ||
91f07168 | 136 | static int nfs3svc_decode_setaclargs(struct svc_rqst *rqstp, __be32 *p, |
a257cdd0 AG |
137 | struct nfsd3_setaclargs *args) |
138 | { | |
139 | struct kvec *head = rqstp->rq_arg.head; | |
140 | unsigned int base; | |
141 | int n; | |
142 | ||
143 | if (!(p = nfs3svc_decode_fh(p, &args->fh))) | |
144 | return 0; | |
145 | args->mask = ntohl(*p++); | |
146 | if (args->mask & ~(NFS_ACL|NFS_ACLCNT|NFS_DFACL|NFS_DFACLCNT) || | |
147 | !xdr_argsize_check(rqstp, p)) | |
148 | return 0; | |
149 | ||
150 | base = (char *)p - (char *)head->iov_base; | |
151 | n = nfsacl_decode(&rqstp->rq_arg, base, NULL, | |
152 | (args->mask & NFS_ACL) ? | |
153 | &args->acl_access : NULL); | |
154 | if (n > 0) | |
155 | n = nfsacl_decode(&rqstp->rq_arg, base + n, NULL, | |
156 | (args->mask & NFS_DFACL) ? | |
157 | &args->acl_default : NULL); | |
158 | return (n > 0); | |
159 | } | |
160 | ||
161 | /* | |
162 | * XDR encode functions | |
163 | */ | |
164 | ||
165 | /* GETACL */ | |
91f07168 | 166 | static int nfs3svc_encode_getaclres(struct svc_rqst *rqstp, __be32 *p, |
a257cdd0 AG |
167 | struct nfsd3_getaclres *resp) |
168 | { | |
169 | struct dentry *dentry = resp->fh.fh_dentry; | |
170 | ||
171 | p = nfs3svc_encode_post_op_attr(rqstp, p, &resp->fh); | |
172 | if (resp->status == 0 && dentry && dentry->d_inode) { | |
173 | struct inode *inode = dentry->d_inode; | |
a257cdd0 AG |
174 | struct kvec *head = rqstp->rq_res.head; |
175 | unsigned int base; | |
176 | int n; | |
14d2b59e | 177 | int w; |
a257cdd0 AG |
178 | |
179 | *p++ = htonl(resp->mask); | |
180 | if (!xdr_ressize_check(rqstp, p)) | |
181 | return 0; | |
182 | base = (char *)p - (char *)head->iov_base; | |
183 | ||
14d2b59e JJ |
184 | rqstp->rq_res.page_len = w = nfsacl_size( |
185 | (resp->mask & NFS_ACL) ? resp->acl_access : NULL, | |
186 | (resp->mask & NFS_DFACL) ? resp->acl_default : NULL); | |
a257cdd0 | 187 | while (w > 0) { |
44524359 | 188 | if (!rqstp->rq_respages[rqstp->rq_resused++]) |
a257cdd0 AG |
189 | return 0; |
190 | w -= PAGE_SIZE; | |
191 | } | |
192 | ||
193 | n = nfsacl_encode(&rqstp->rq_res, base, inode, | |
194 | resp->acl_access, | |
195 | resp->mask & NFS_ACL, 0); | |
196 | if (n > 0) | |
197 | n = nfsacl_encode(&rqstp->rq_res, base + n, inode, | |
198 | resp->acl_default, | |
199 | resp->mask & NFS_DFACL, | |
200 | NFS_ACL_DEFAULT); | |
201 | if (n <= 0) | |
202 | return 0; | |
203 | } else | |
204 | if (!xdr_ressize_check(rqstp, p)) | |
205 | return 0; | |
206 | ||
207 | return 1; | |
208 | } | |
209 | ||
210 | /* SETACL */ | |
91f07168 | 211 | static int nfs3svc_encode_setaclres(struct svc_rqst *rqstp, __be32 *p, |
a257cdd0 AG |
212 | struct nfsd3_attrstat *resp) |
213 | { | |
214 | p = nfs3svc_encode_post_op_attr(rqstp, p, &resp->fh); | |
215 | ||
216 | return xdr_ressize_check(rqstp, p); | |
217 | } | |
218 | ||
219 | /* | |
220 | * XDR release functions | |
221 | */ | |
91f07168 | 222 | static int nfs3svc_release_getacl(struct svc_rqst *rqstp, __be32 *p, |
a257cdd0 AG |
223 | struct nfsd3_getaclres *resp) |
224 | { | |
225 | fh_put(&resp->fh); | |
226 | posix_acl_release(resp->acl_access); | |
227 | posix_acl_release(resp->acl_default); | |
228 | return 1; | |
229 | } | |
230 | ||
231 | #define nfs3svc_decode_voidargs NULL | |
232 | #define nfs3svc_release_void NULL | |
233 | #define nfsd3_setaclres nfsd3_attrstat | |
234 | #define nfsd3_voidres nfsd3_voidargs | |
235 | struct nfsd3_voidargs { int dummy; }; | |
236 | ||
237 | #define PROC(name, argt, rest, relt, cache, respsize) \ | |
238 | { (svc_procfunc) nfsd3_proc_##name, \ | |
239 | (kxdrproc_t) nfs3svc_decode_##argt##args, \ | |
240 | (kxdrproc_t) nfs3svc_encode_##rest##res, \ | |
241 | (kxdrproc_t) nfs3svc_release_##relt, \ | |
242 | sizeof(struct nfsd3_##argt##args), \ | |
243 | sizeof(struct nfsd3_##rest##res), \ | |
244 | 0, \ | |
245 | cache, \ | |
246 | respsize, \ | |
247 | } | |
248 | ||
249 | #define ST 1 /* status*/ | |
250 | #define AT 21 /* attributes */ | |
251 | #define pAT (1+AT) /* post attributes - conditional */ | |
252 | #define ACL (1+NFS_ACL_MAX_ENTRIES*3) /* Access Control List */ | |
253 | ||
254 | static struct svc_procedure nfsd_acl_procedures3[] = { | |
255 | PROC(null, void, void, void, RC_NOCACHE, ST), | |
256 | PROC(getacl, getacl, getacl, getacl, RC_NOCACHE, ST+1+2*(1+ACL)), | |
257 | PROC(setacl, setacl, setacl, fhandle, RC_NOCACHE, ST+pAT), | |
258 | }; | |
259 | ||
260 | struct svc_version nfsd_acl_version3 = { | |
261 | .vs_vers = 3, | |
262 | .vs_nproc = 3, | |
263 | .vs_proc = nfsd_acl_procedures3, | |
264 | .vs_dispatch = nfsd_dispatch, | |
265 | .vs_xdrsize = NFS3_SVC_XDRSIZE, | |
bc5fea42 | 266 | .vs_hidden = 1, |
a257cdd0 AG |
267 | }; |
268 |