Commit | Line | Data |
---|---|---|
a257cdd0 | 1 | /* |
a257cdd0 AG |
2 | * Process version 3 NFSACL requests. |
3 | * | |
4 | * Copyright (C) 2002-2003 Andreas Gruenbacher <agruen@suse.de> | |
5 | */ | |
6 | ||
9a74af21 BH |
7 | #include "nfsd.h" |
8 | /* FIXME: nfsacl.h is a broken header */ | |
a257cdd0 | 9 | #include <linux/nfsacl.h> |
9a74af21 BH |
10 | #include "cache.h" |
11 | #include "xdr3.h" | |
0a3adade | 12 | #include "vfs.h" |
a257cdd0 AG |
13 | |
14 | #define RETURN_STATUS(st) { resp->status = (st); return (st); } | |
15 | ||
16 | /* | |
17 | * NULL call. | |
18 | */ | |
7111c66e | 19 | static __be32 |
a257cdd0 AG |
20 | nfsd3_proc_null(struct svc_rqst *rqstp, void *argp, void *resp) |
21 | { | |
22 | return nfs_ok; | |
23 | } | |
24 | ||
25 | /* | |
26 | * Get the Access and/or Default ACL of a file. | |
27 | */ | |
7111c66e | 28 | static __be32 nfsd3_proc_getacl(struct svc_rqst * rqstp, |
a257cdd0 AG |
29 | struct nfsd3_getaclargs *argp, struct nfsd3_getaclres *resp) |
30 | { | |
31 | svc_fh *fh; | |
32 | struct posix_acl *acl; | |
c4d987ba | 33 | __be32 nfserr = 0; |
a257cdd0 AG |
34 | |
35 | fh = fh_copy(&resp->fh, &argp->fh); | |
8837abca MS |
36 | nfserr = fh_verify(rqstp, &resp->fh, 0, NFSD_MAY_NOP); |
37 | if (nfserr) | |
ac8587dc | 38 | RETURN_STATUS(nfserr); |
a257cdd0 AG |
39 | |
40 | if (argp->mask & ~(NFS_ACL|NFS_ACLCNT|NFS_DFACL|NFS_DFACLCNT)) | |
41 | RETURN_STATUS(nfserr_inval); | |
42 | resp->mask = argp->mask; | |
43 | ||
44 | if (resp->mask & (NFS_ACL|NFS_ACLCNT)) { | |
45 | acl = nfsd_get_posix_acl(fh, ACL_TYPE_ACCESS); | |
46 | if (IS_ERR(acl)) { | |
47 | int err = PTR_ERR(acl); | |
48 | ||
49 | if (err == -ENODATA || err == -EOPNOTSUPP) | |
50 | acl = NULL; | |
51 | else { | |
52 | nfserr = nfserrno(err); | |
53 | goto fail; | |
54 | } | |
55 | } | |
56 | if (acl == NULL) { | |
57 | /* Solaris returns the inode's minimum ACL. */ | |
58 | ||
59 | struct inode *inode = fh->fh_dentry->d_inode; | |
60 | acl = posix_acl_from_mode(inode->i_mode, GFP_KERNEL); | |
61 | } | |
62 | resp->acl_access = acl; | |
63 | } | |
64 | if (resp->mask & (NFS_DFACL|NFS_DFACLCNT)) { | |
65 | /* Check how Solaris handles requests for the Default ACL | |
66 | of a non-directory! */ | |
67 | ||
68 | acl = nfsd_get_posix_acl(fh, ACL_TYPE_DEFAULT); | |
69 | if (IS_ERR(acl)) { | |
70 | int err = PTR_ERR(acl); | |
71 | ||
72 | if (err == -ENODATA || err == -EOPNOTSUPP) | |
73 | acl = NULL; | |
74 | else { | |
75 | nfserr = nfserrno(err); | |
76 | goto fail; | |
77 | } | |
78 | } | |
79 | resp->acl_default = acl; | |
80 | } | |
81 | ||
82 | /* resp->acl_{access,default} are released in nfs3svc_release_getacl. */ | |
83 | RETURN_STATUS(0); | |
84 | ||
85 | fail: | |
86 | posix_acl_release(resp->acl_access); | |
87 | posix_acl_release(resp->acl_default); | |
88 | RETURN_STATUS(nfserr); | |
89 | } | |
90 | ||
91 | /* | |
92 | * Set the Access and/or Default ACL of a file. | |
93 | */ | |
7111c66e | 94 | static __be32 nfsd3_proc_setacl(struct svc_rqst * rqstp, |
a257cdd0 AG |
95 | struct nfsd3_setaclargs *argp, |
96 | struct nfsd3_attrstat *resp) | |
97 | { | |
98 | svc_fh *fh; | |
c4d987ba | 99 | __be32 nfserr = 0; |
a257cdd0 AG |
100 | |
101 | fh = fh_copy(&resp->fh, &argp->fh); | |
8837abca | 102 | nfserr = fh_verify(rqstp, &resp->fh, 0, NFSD_MAY_SATTR); |
a257cdd0 AG |
103 | |
104 | if (!nfserr) { | |
105 | nfserr = nfserrno( nfsd_set_posix_acl( | |
106 | fh, ACL_TYPE_ACCESS, argp->acl_access) ); | |
107 | } | |
108 | if (!nfserr) { | |
109 | nfserr = nfserrno( nfsd_set_posix_acl( | |
110 | fh, ACL_TYPE_DEFAULT, argp->acl_default) ); | |
111 | } | |
112 | ||
113 | /* argp->acl_{access,default} may have been allocated in | |
114 | nfs3svc_decode_setaclargs. */ | |
115 | posix_acl_release(argp->acl_access); | |
116 | posix_acl_release(argp->acl_default); | |
117 | RETURN_STATUS(nfserr); | |
118 | } | |
119 | ||
120 | /* | |
121 | * XDR decode functions | |
122 | */ | |
91f07168 | 123 | static int nfs3svc_decode_getaclargs(struct svc_rqst *rqstp, __be32 *p, |
a257cdd0 AG |
124 | struct nfsd3_getaclargs *args) |
125 | { | |
126 | if (!(p = nfs3svc_decode_fh(p, &args->fh))) | |
127 | return 0; | |
128 | args->mask = ntohl(*p); p++; | |
129 | ||
130 | return xdr_argsize_check(rqstp, p); | |
131 | } | |
132 | ||
133 | ||
91f07168 | 134 | static int nfs3svc_decode_setaclargs(struct svc_rqst *rqstp, __be32 *p, |
a257cdd0 AG |
135 | struct nfsd3_setaclargs *args) |
136 | { | |
137 | struct kvec *head = rqstp->rq_arg.head; | |
138 | unsigned int base; | |
139 | int n; | |
140 | ||
141 | if (!(p = nfs3svc_decode_fh(p, &args->fh))) | |
142 | return 0; | |
143 | args->mask = ntohl(*p++); | |
144 | if (args->mask & ~(NFS_ACL|NFS_ACLCNT|NFS_DFACL|NFS_DFACLCNT) || | |
145 | !xdr_argsize_check(rqstp, p)) | |
146 | return 0; | |
147 | ||
148 | base = (char *)p - (char *)head->iov_base; | |
149 | n = nfsacl_decode(&rqstp->rq_arg, base, NULL, | |
150 | (args->mask & NFS_ACL) ? | |
151 | &args->acl_access : NULL); | |
152 | if (n > 0) | |
153 | n = nfsacl_decode(&rqstp->rq_arg, base + n, NULL, | |
154 | (args->mask & NFS_DFACL) ? | |
155 | &args->acl_default : NULL); | |
156 | return (n > 0); | |
157 | } | |
158 | ||
159 | /* | |
160 | * XDR encode functions | |
161 | */ | |
162 | ||
163 | /* GETACL */ | |
91f07168 | 164 | static int nfs3svc_encode_getaclres(struct svc_rqst *rqstp, __be32 *p, |
a257cdd0 AG |
165 | struct nfsd3_getaclres *resp) |
166 | { | |
167 | struct dentry *dentry = resp->fh.fh_dentry; | |
168 | ||
169 | p = nfs3svc_encode_post_op_attr(rqstp, p, &resp->fh); | |
170 | if (resp->status == 0 && dentry && dentry->d_inode) { | |
171 | struct inode *inode = dentry->d_inode; | |
a257cdd0 AG |
172 | struct kvec *head = rqstp->rq_res.head; |
173 | unsigned int base; | |
174 | int n; | |
14d2b59e | 175 | int w; |
a257cdd0 AG |
176 | |
177 | *p++ = htonl(resp->mask); | |
178 | if (!xdr_ressize_check(rqstp, p)) | |
179 | return 0; | |
180 | base = (char *)p - (char *)head->iov_base; | |
181 | ||
14d2b59e JJ |
182 | rqstp->rq_res.page_len = w = nfsacl_size( |
183 | (resp->mask & NFS_ACL) ? resp->acl_access : NULL, | |
184 | (resp->mask & NFS_DFACL) ? resp->acl_default : NULL); | |
a257cdd0 | 185 | while (w > 0) { |
44524359 | 186 | if (!rqstp->rq_respages[rqstp->rq_resused++]) |
a257cdd0 AG |
187 | return 0; |
188 | w -= PAGE_SIZE; | |
189 | } | |
190 | ||
191 | n = nfsacl_encode(&rqstp->rq_res, base, inode, | |
192 | resp->acl_access, | |
193 | resp->mask & NFS_ACL, 0); | |
194 | if (n > 0) | |
195 | n = nfsacl_encode(&rqstp->rq_res, base + n, inode, | |
196 | resp->acl_default, | |
197 | resp->mask & NFS_DFACL, | |
198 | NFS_ACL_DEFAULT); | |
199 | if (n <= 0) | |
200 | return 0; | |
201 | } else | |
202 | if (!xdr_ressize_check(rqstp, p)) | |
203 | return 0; | |
204 | ||
205 | return 1; | |
206 | } | |
207 | ||
208 | /* SETACL */ | |
91f07168 | 209 | static int nfs3svc_encode_setaclres(struct svc_rqst *rqstp, __be32 *p, |
a257cdd0 AG |
210 | struct nfsd3_attrstat *resp) |
211 | { | |
212 | p = nfs3svc_encode_post_op_attr(rqstp, p, &resp->fh); | |
213 | ||
214 | return xdr_ressize_check(rqstp, p); | |
215 | } | |
216 | ||
217 | /* | |
218 | * XDR release functions | |
219 | */ | |
91f07168 | 220 | static int nfs3svc_release_getacl(struct svc_rqst *rqstp, __be32 *p, |
a257cdd0 AG |
221 | struct nfsd3_getaclres *resp) |
222 | { | |
223 | fh_put(&resp->fh); | |
224 | posix_acl_release(resp->acl_access); | |
225 | posix_acl_release(resp->acl_default); | |
226 | return 1; | |
227 | } | |
228 | ||
229 | #define nfs3svc_decode_voidargs NULL | |
230 | #define nfs3svc_release_void NULL | |
231 | #define nfsd3_setaclres nfsd3_attrstat | |
232 | #define nfsd3_voidres nfsd3_voidargs | |
233 | struct nfsd3_voidargs { int dummy; }; | |
234 | ||
235 | #define PROC(name, argt, rest, relt, cache, respsize) \ | |
236 | { (svc_procfunc) nfsd3_proc_##name, \ | |
237 | (kxdrproc_t) nfs3svc_decode_##argt##args, \ | |
238 | (kxdrproc_t) nfs3svc_encode_##rest##res, \ | |
239 | (kxdrproc_t) nfs3svc_release_##relt, \ | |
240 | sizeof(struct nfsd3_##argt##args), \ | |
241 | sizeof(struct nfsd3_##rest##res), \ | |
242 | 0, \ | |
243 | cache, \ | |
244 | respsize, \ | |
245 | } | |
246 | ||
247 | #define ST 1 /* status*/ | |
248 | #define AT 21 /* attributes */ | |
249 | #define pAT (1+AT) /* post attributes - conditional */ | |
250 | #define ACL (1+NFS_ACL_MAX_ENTRIES*3) /* Access Control List */ | |
251 | ||
252 | static struct svc_procedure nfsd_acl_procedures3[] = { | |
253 | PROC(null, void, void, void, RC_NOCACHE, ST), | |
254 | PROC(getacl, getacl, getacl, getacl, RC_NOCACHE, ST+1+2*(1+ACL)), | |
255 | PROC(setacl, setacl, setacl, fhandle, RC_NOCACHE, ST+pAT), | |
256 | }; | |
257 | ||
258 | struct svc_version nfsd_acl_version3 = { | |
259 | .vs_vers = 3, | |
260 | .vs_nproc = 3, | |
261 | .vs_proc = nfsd_acl_procedures3, | |
262 | .vs_dispatch = nfsd_dispatch, | |
263 | .vs_xdrsize = NFS3_SVC_XDRSIZE, | |
1b7e0403 | 264 | .vs_hidden = 0, |
a257cdd0 AG |
265 | }; |
266 |