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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#define NFSDDBG_FACILITY NFSDDBG_PROC
17
18
19
20
21static __be32
22nfsacld_proc_null(struct svc_rqst *rqstp)
23{
24 return rpc_success;
25}
26
27
28
29
30static __be32 nfsacld_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
38 dprintk("nfsd: GETACL(2acl) %s\n", SVCFH_fmt(&argp->fh));
39
40 fh = fh_copy(&resp->fh, &argp->fh);
41 resp->status = fh_verify(rqstp, &resp->fh, 0, NFSD_MAY_NOP);
42 if (resp->status != nfs_ok)
43 goto out;
44
45 inode = d_inode(fh->fh_dentry);
46
47 if (argp->mask & ~NFS_ACL_MASK) {
48 resp->status = nfserr_inval;
49 goto out;
50 }
51 resp->mask = argp->mask;
52
53 resp->status = fh_getattr(fh, &resp->stat);
54 if (resp->status != nfs_ok)
55 goto out;
56
57 if (resp->mask & (NFS_ACL|NFS_ACLCNT)) {
58 acl = get_acl(inode, ACL_TYPE_ACCESS);
59 if (acl == NULL) {
60
61 acl = posix_acl_from_mode(inode->i_mode, GFP_KERNEL);
62 }
63 if (IS_ERR(acl)) {
64 resp->status = nfserrno(PTR_ERR(acl));
65 goto fail;
66 }
67 resp->acl_access = acl;
68 }
69 if (resp->mask & (NFS_DFACL|NFS_DFACLCNT)) {
70
71
72 acl = get_acl(inode, ACL_TYPE_DEFAULT);
73 if (IS_ERR(acl)) {
74 resp->status = nfserrno(PTR_ERR(acl));
75 goto fail;
76 }
77 resp->acl_default = acl;
78 }
79
80
81out:
82 return rpc_success;
83
84fail:
85 posix_acl_release(resp->acl_access);
86 posix_acl_release(resp->acl_default);
87 goto out;
88}
89
90
91
92
93static __be32 nfsacld_proc_setacl(struct svc_rqst *rqstp)
94{
95 struct nfsd3_setaclargs *argp = rqstp->rq_argp;
96 struct nfsd_attrstat *resp = rqstp->rq_resp;
97 struct inode *inode;
98 svc_fh *fh;
99 int error;
100
101 dprintk("nfsd: SETACL(2acl) %s\n", SVCFH_fmt(&argp->fh));
102
103 fh = fh_copy(&resp->fh, &argp->fh);
104 resp->status = fh_verify(rqstp, &resp->fh, 0, NFSD_MAY_SATTR);
105 if (resp->status != nfs_ok)
106 goto out;
107
108 inode = d_inode(fh->fh_dentry);
109
110 error = fh_want_write(fh);
111 if (error)
112 goto out_errno;
113
114 fh_lock(fh);
115
116 error = set_posix_acl(&init_user_ns, inode, ACL_TYPE_ACCESS,
117 argp->acl_access);
118 if (error)
119 goto out_drop_lock;
120 error = set_posix_acl(&init_user_ns, inode, ACL_TYPE_DEFAULT,
121 argp->acl_default);
122 if (error)
123 goto out_drop_lock;
124
125 fh_unlock(fh);
126
127 fh_drop_write(fh);
128
129 resp->status = fh_getattr(fh, &resp->stat);
130
131out:
132
133
134 posix_acl_release(argp->acl_access);
135 posix_acl_release(argp->acl_default);
136 return rpc_success;
137
138out_drop_lock:
139 fh_unlock(fh);
140 fh_drop_write(fh);
141out_errno:
142 resp->status = nfserrno(error);
143 goto out;
144}
145
146
147
148
149static __be32 nfsacld_proc_getattr(struct svc_rqst *rqstp)
150{
151 struct nfsd_fhandle *argp = rqstp->rq_argp;
152 struct nfsd_attrstat *resp = rqstp->rq_resp;
153
154 dprintk("nfsd: GETATTR %s\n", SVCFH_fmt(&argp->fh));
155
156 fh_copy(&resp->fh, &argp->fh);
157 resp->status = fh_verify(rqstp, &resp->fh, 0, NFSD_MAY_NOP);
158 if (resp->status != nfs_ok)
159 goto out;
160 resp->status = fh_getattr(&resp->fh, &resp->stat);
161out:
162 return rpc_success;
163}
164
165
166
167
168static __be32 nfsacld_proc_access(struct svc_rqst *rqstp)
169{
170 struct nfsd3_accessargs *argp = rqstp->rq_argp;
171 struct nfsd3_accessres *resp = rqstp->rq_resp;
172
173 dprintk("nfsd: ACCESS(2acl) %s 0x%x\n",
174 SVCFH_fmt(&argp->fh),
175 argp->access);
176
177 fh_copy(&resp->fh, &argp->fh);
178 resp->access = argp->access;
179 resp->status = nfsd_access(rqstp, &resp->fh, &resp->access, NULL);
180 if (resp->status != nfs_ok)
181 goto out;
182 resp->status = fh_getattr(&resp->fh, &resp->stat);
183out:
184 return rpc_success;
185}
186
187
188
189
190
191static int nfsaclsvc_decode_getaclargs(struct svc_rqst *rqstp, __be32 *p)
192{
193 struct xdr_stream *xdr = &rqstp->rq_arg_stream;
194 struct nfsd3_getaclargs *argp = rqstp->rq_argp;
195
196 if (!svcxdr_decode_fhandle(xdr, &argp->fh))
197 return 0;
198 if (xdr_stream_decode_u32(xdr, &argp->mask) < 0)
199 return 0;
200
201 return 1;
202}
203
204static int nfsaclsvc_decode_setaclargs(struct svc_rqst *rqstp, __be32 *p)
205{
206 struct xdr_stream *xdr = &rqstp->rq_arg_stream;
207 struct nfsd3_setaclargs *argp = rqstp->rq_argp;
208
209 if (!svcxdr_decode_fhandle(xdr, &argp->fh))
210 return 0;
211 if (xdr_stream_decode_u32(xdr, &argp->mask) < 0)
212 return 0;
213 if (argp->mask & ~NFS_ACL_MASK)
214 return 0;
215 if (!nfs_stream_decode_acl(xdr, NULL, (argp->mask & NFS_ACL) ?
216 &argp->acl_access : NULL))
217 return 0;
218 if (!nfs_stream_decode_acl(xdr, NULL, (argp->mask & NFS_DFACL) ?
219 &argp->acl_default : NULL))
220 return 0;
221
222 return 1;
223}
224
225static int nfsaclsvc_decode_accessargs(struct svc_rqst *rqstp, __be32 *p)
226{
227 struct xdr_stream *xdr = &rqstp->rq_arg_stream;
228 struct nfsd3_accessargs *args = rqstp->rq_argp;
229
230 if (!svcxdr_decode_fhandle(xdr, &args->fh))
231 return 0;
232 if (xdr_stream_decode_u32(xdr, &args->access) < 0)
233 return 0;
234
235 return 1;
236}
237
238
239
240
241
242
243static int nfsaclsvc_encode_getaclres(struct svc_rqst *rqstp, __be32 *p)
244{
245 struct xdr_stream *xdr = &rqstp->rq_res_stream;
246 struct nfsd3_getaclres *resp = rqstp->rq_resp;
247 struct dentry *dentry = resp->fh.fh_dentry;
248 struct inode *inode;
249 int w;
250
251 if (!svcxdr_encode_stat(xdr, resp->status))
252 return 0;
253
254 if (dentry == NULL || d_really_is_negative(dentry))
255 return 1;
256 inode = d_inode(dentry);
257
258 if (!svcxdr_encode_fattr(rqstp, xdr, &resp->fh, &resp->stat))
259 return 0;
260 if (xdr_stream_encode_u32(xdr, resp->mask) < 0)
261 return 0;
262
263 rqstp->rq_res.page_len = w = nfsacl_size(
264 (resp->mask & NFS_ACL) ? resp->acl_access : NULL,
265 (resp->mask & NFS_DFACL) ? resp->acl_default : NULL);
266 while (w > 0) {
267 if (!*(rqstp->rq_next_page++))
268 return 1;
269 w -= PAGE_SIZE;
270 }
271
272 if (!nfs_stream_encode_acl(xdr, inode, resp->acl_access,
273 resp->mask & NFS_ACL, 0))
274 return 0;
275 if (!nfs_stream_encode_acl(xdr, inode, resp->acl_default,
276 resp->mask & NFS_DFACL, NFS_ACL_DEFAULT))
277 return 0;
278
279 return 1;
280}
281
282
283static int nfsaclsvc_encode_accessres(struct svc_rqst *rqstp, __be32 *p)
284{
285 struct xdr_stream *xdr = &rqstp->rq_res_stream;
286 struct nfsd3_accessres *resp = rqstp->rq_resp;
287
288 if (!svcxdr_encode_stat(xdr, resp->status))
289 return 0;
290 switch (resp->status) {
291 case nfs_ok:
292 if (!svcxdr_encode_fattr(rqstp, xdr, &resp->fh, &resp->stat))
293 return 0;
294 if (xdr_stream_encode_u32(xdr, resp->access) < 0)
295 return 0;
296 break;
297 }
298
299 return 1;
300}
301
302
303
304
305static void nfsaclsvc_release_getacl(struct svc_rqst *rqstp)
306{
307 struct nfsd3_getaclres *resp = rqstp->rq_resp;
308
309 fh_put(&resp->fh);
310 posix_acl_release(resp->acl_access);
311 posix_acl_release(resp->acl_default);
312}
313
314static void nfsaclsvc_release_access(struct svc_rqst *rqstp)
315{
316 struct nfsd3_accessres *resp = rqstp->rq_resp;
317
318 fh_put(&resp->fh);
319}
320
321struct nfsd3_voidargs { int dummy; };
322
323#define ST 1
324#define AT 21
325#define pAT (1+AT)
326#define ACL (1+NFS_ACL_MAX_ENTRIES*3)
327
328static const struct svc_procedure nfsd_acl_procedures2[5] = {
329 [ACLPROC2_NULL] = {
330 .pc_func = nfsacld_proc_null,
331 .pc_decode = nfssvc_decode_voidarg,
332 .pc_encode = nfssvc_encode_voidres,
333 .pc_argsize = sizeof(struct nfsd_voidargs),
334 .pc_ressize = sizeof(struct nfsd_voidres),
335 .pc_cachetype = RC_NOCACHE,
336 .pc_xdrressize = ST,
337 .pc_name = "NULL",
338 },
339 [ACLPROC2_GETACL] = {
340 .pc_func = nfsacld_proc_getacl,
341 .pc_decode = nfsaclsvc_decode_getaclargs,
342 .pc_encode = nfsaclsvc_encode_getaclres,
343 .pc_release = nfsaclsvc_release_getacl,
344 .pc_argsize = sizeof(struct nfsd3_getaclargs),
345 .pc_ressize = sizeof(struct nfsd3_getaclres),
346 .pc_cachetype = RC_NOCACHE,
347 .pc_xdrressize = ST+1+2*(1+ACL),
348 .pc_name = "GETACL",
349 },
350 [ACLPROC2_SETACL] = {
351 .pc_func = nfsacld_proc_setacl,
352 .pc_decode = nfsaclsvc_decode_setaclargs,
353 .pc_encode = nfssvc_encode_attrstatres,
354 .pc_release = nfssvc_release_attrstat,
355 .pc_argsize = sizeof(struct nfsd3_setaclargs),
356 .pc_ressize = sizeof(struct nfsd_attrstat),
357 .pc_cachetype = RC_NOCACHE,
358 .pc_xdrressize = ST+AT,
359 .pc_name = "SETACL",
360 },
361 [ACLPROC2_GETATTR] = {
362 .pc_func = nfsacld_proc_getattr,
363 .pc_decode = nfssvc_decode_fhandleargs,
364 .pc_encode = nfssvc_encode_attrstatres,
365 .pc_release = nfssvc_release_attrstat,
366 .pc_argsize = sizeof(struct nfsd_fhandle),
367 .pc_ressize = sizeof(struct nfsd_attrstat),
368 .pc_cachetype = RC_NOCACHE,
369 .pc_xdrressize = ST+AT,
370 .pc_name = "GETATTR",
371 },
372 [ACLPROC2_ACCESS] = {
373 .pc_func = nfsacld_proc_access,
374 .pc_decode = nfsaclsvc_decode_accessargs,
375 .pc_encode = nfsaclsvc_encode_accessres,
376 .pc_release = nfsaclsvc_release_access,
377 .pc_argsize = sizeof(struct nfsd3_accessargs),
378 .pc_ressize = sizeof(struct nfsd3_accessres),
379 .pc_cachetype = RC_NOCACHE,
380 .pc_xdrressize = ST+AT+1,
381 .pc_name = "SETATTR",
382 },
383};
384
385static unsigned int nfsd_acl_count2[ARRAY_SIZE(nfsd_acl_procedures2)];
386const struct svc_version nfsd_acl_version2 = {
387 .vs_vers = 2,
388 .vs_nproc = 5,
389 .vs_proc = nfsd_acl_procedures2,
390 .vs_count = nfsd_acl_count2,
391 .vs_dispatch = nfsd_dispatch,
392 .vs_xdrsize = NFS3_SVC_XDRSIZE,
393};
394
