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[/] [test_project/] [trunk/] [linux_sd_driver/] [fs/] [nfsd/] [nfs2acl.c] - Blame information for rev 79

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Line No. Rev Author Line
1 62 marcus.erl
/*
2
 * linux/fs/nfsd/nfs2acl.c
3
 *
4
 * Process version 2 NFSACL requests.
5
 *
6
 * Copyright (C) 2002-2003 Andreas Gruenbacher <agruen@suse.de>
7
 */
8
 
9
#include <linux/sunrpc/svc.h>
10
#include <linux/nfs.h>
11
#include <linux/nfsd/nfsd.h>
12
#include <linux/nfsd/cache.h>
13
#include <linux/nfsd/xdr.h>
14
#include <linux/nfsd/xdr3.h>
15
#include <linux/posix_acl.h>
16
#include <linux/nfsacl.h>
17
 
18
#define NFSDDBG_FACILITY                NFSDDBG_PROC
19
#define RETURN_STATUS(st)       { resp->status = (st); return (st); }
20
 
21
/*
22
 * NULL call.
23
 */
24
static __be32
25
nfsacld_proc_null(struct svc_rqst *rqstp, void *argp, void *resp)
26
{
27
        return nfs_ok;
28
}
29
 
30
/*
31
 * Get the Access and/or Default ACL of a file.
32
 */
33
static __be32 nfsacld_proc_getacl(struct svc_rqst * rqstp,
34
                struct nfsd3_getaclargs *argp, struct nfsd3_getaclres *resp)
35
{
36
        svc_fh *fh;
37
        struct posix_acl *acl;
38
        __be32 nfserr = 0;
39
 
40
        dprintk("nfsd: GETACL(2acl)   %s\n", SVCFH_fmt(&argp->fh));
41
 
42
        fh = fh_copy(&resp->fh, &argp->fh);
43
        if ((nfserr = fh_verify(rqstp, &resp->fh, 0, MAY_NOP)))
44
                RETURN_STATUS(nfserr);
45
 
46
        if (argp->mask & ~(NFS_ACL|NFS_ACLCNT|NFS_DFACL|NFS_DFACLCNT))
47
                RETURN_STATUS(nfserr_inval);
48
        resp->mask = argp->mask;
49
 
50
        if (resp->mask & (NFS_ACL|NFS_ACLCNT)) {
51
                acl = nfsd_get_posix_acl(fh, ACL_TYPE_ACCESS);
52
                if (IS_ERR(acl)) {
53
                        int err = PTR_ERR(acl);
54
 
55
                        if (err == -ENODATA || err == -EOPNOTSUPP)
56
                                acl = NULL;
57
                        else {
58
                                nfserr = nfserrno(err);
59
                                goto fail;
60
                        }
61
                }
62
                if (acl == NULL) {
63
                        /* Solaris returns the inode's minimum ACL. */
64
 
65
                        struct inode *inode = fh->fh_dentry->d_inode;
66
                        acl = posix_acl_from_mode(inode->i_mode, GFP_KERNEL);
67
                }
68
                resp->acl_access = acl;
69
        }
70
        if (resp->mask & (NFS_DFACL|NFS_DFACLCNT)) {
71
                /* Check how Solaris handles requests for the Default ACL
72
                   of a non-directory! */
73
 
74
                acl = nfsd_get_posix_acl(fh, ACL_TYPE_DEFAULT);
75
                if (IS_ERR(acl)) {
76
                        int err = PTR_ERR(acl);
77
 
78
                        if (err == -ENODATA || err == -EOPNOTSUPP)
79
                                acl = NULL;
80
                        else {
81
                                nfserr = nfserrno(err);
82
                                goto fail;
83
                        }
84
                }
85
                resp->acl_default = acl;
86
        }
87
 
88
        /* resp->acl_{access,default} are released in nfssvc_release_getacl. */
89
        RETURN_STATUS(0);
90
 
91
fail:
92
        posix_acl_release(resp->acl_access);
93
        posix_acl_release(resp->acl_default);
94
        RETURN_STATUS(nfserr);
95
}
96
 
97
/*
98
 * Set the Access and/or Default ACL of a file.
99
 */
100
static __be32 nfsacld_proc_setacl(struct svc_rqst * rqstp,
101
                struct nfsd3_setaclargs *argp,
102
                struct nfsd_attrstat *resp)
103
{
104
        svc_fh *fh;
105
        __be32 nfserr = 0;
106
 
107
        dprintk("nfsd: SETACL(2acl)   %s\n", SVCFH_fmt(&argp->fh));
108
 
109
        fh = fh_copy(&resp->fh, &argp->fh);
110
        nfserr = fh_verify(rqstp, &resp->fh, 0, MAY_SATTR);
111
 
112
        if (!nfserr) {
113
                nfserr = nfserrno( nfsd_set_posix_acl(
114
                        fh, ACL_TYPE_ACCESS, argp->acl_access) );
115
        }
116
        if (!nfserr) {
117
                nfserr = nfserrno( nfsd_set_posix_acl(
118
                        fh, ACL_TYPE_DEFAULT, argp->acl_default) );
119
        }
120
 
121
        /* argp->acl_{access,default} may have been allocated in
122
           nfssvc_decode_setaclargs. */
123
        posix_acl_release(argp->acl_access);
124
        posix_acl_release(argp->acl_default);
125
        return nfserr;
126
}
127
 
128
/*
129
 * Check file attributes
130
 */
131
static __be32 nfsacld_proc_getattr(struct svc_rqst * rqstp,
132
                struct nfsd_fhandle *argp, struct nfsd_attrstat *resp)
133
{
134
        dprintk("nfsd: GETATTR  %s\n", SVCFH_fmt(&argp->fh));
135
 
136
        fh_copy(&resp->fh, &argp->fh);
137
        return fh_verify(rqstp, &resp->fh, 0, MAY_NOP);
138
}
139
 
140
/*
141
 * Check file access
142
 */
143
static __be32 nfsacld_proc_access(struct svc_rqst *rqstp, struct nfsd3_accessargs *argp,
144
                struct nfsd3_accessres *resp)
145
{
146
        __be32 nfserr;
147
 
148
        dprintk("nfsd: ACCESS(2acl)   %s 0x%x\n",
149
                        SVCFH_fmt(&argp->fh),
150
                        argp->access);
151
 
152
        fh_copy(&resp->fh, &argp->fh);
153
        resp->access = argp->access;
154
        nfserr = nfsd_access(rqstp, &resp->fh, &resp->access, NULL);
155
        return nfserr;
156
}
157
 
158
/*
159
 * XDR decode functions
160
 */
161
static int nfsaclsvc_decode_getaclargs(struct svc_rqst *rqstp, __be32 *p,
162
                struct nfsd3_getaclargs *argp)
163
{
164
        if (!(p = nfs2svc_decode_fh(p, &argp->fh)))
165
                return 0;
166
        argp->mask = ntohl(*p); p++;
167
 
168
        return xdr_argsize_check(rqstp, p);
169
}
170
 
171
 
172
static int nfsaclsvc_decode_setaclargs(struct svc_rqst *rqstp, __be32 *p,
173
                struct nfsd3_setaclargs *argp)
174
{
175
        struct kvec *head = rqstp->rq_arg.head;
176
        unsigned int base;
177
        int n;
178
 
179
        if (!(p = nfs2svc_decode_fh(p, &argp->fh)))
180
                return 0;
181
        argp->mask = ntohl(*p++);
182
        if (argp->mask & ~(NFS_ACL|NFS_ACLCNT|NFS_DFACL|NFS_DFACLCNT) ||
183
            !xdr_argsize_check(rqstp, p))
184
                return 0;
185
 
186
        base = (char *)p - (char *)head->iov_base;
187
        n = nfsacl_decode(&rqstp->rq_arg, base, NULL,
188
                          (argp->mask & NFS_ACL) ?
189
                          &argp->acl_access : NULL);
190
        if (n > 0)
191
                n = nfsacl_decode(&rqstp->rq_arg, base + n, NULL,
192
                                  (argp->mask & NFS_DFACL) ?
193
                                  &argp->acl_default : NULL);
194
        return (n > 0);
195
}
196
 
197
static int nfsaclsvc_decode_fhandleargs(struct svc_rqst *rqstp, __be32 *p,
198
                struct nfsd_fhandle *argp)
199
{
200
        if (!(p = nfs2svc_decode_fh(p, &argp->fh)))
201
                return 0;
202
        return xdr_argsize_check(rqstp, p);
203
}
204
 
205
static int nfsaclsvc_decode_accessargs(struct svc_rqst *rqstp, __be32 *p,
206
                struct nfsd3_accessargs *argp)
207
{
208
        if (!(p = nfs2svc_decode_fh(p, &argp->fh)))
209
                return 0;
210
        argp->access = ntohl(*p++);
211
 
212
        return xdr_argsize_check(rqstp, p);
213
}
214
 
215
/*
216
 * XDR encode functions
217
 */
218
 
219
/* GETACL */
220
static int nfsaclsvc_encode_getaclres(struct svc_rqst *rqstp, __be32 *p,
221
                struct nfsd3_getaclres *resp)
222
{
223
        struct dentry *dentry = resp->fh.fh_dentry;
224
        struct inode *inode = dentry->d_inode;
225
        struct kvec *head = rqstp->rq_res.head;
226
        unsigned int base;
227
        int n;
228
        int w;
229
 
230
        if (dentry == NULL || dentry->d_inode == NULL)
231
                return 0;
232
        inode = dentry->d_inode;
233
 
234
        p = nfs2svc_encode_fattr(rqstp, p, &resp->fh);
235
        *p++ = htonl(resp->mask);
236
        if (!xdr_ressize_check(rqstp, p))
237
                return 0;
238
        base = (char *)p - (char *)head->iov_base;
239
 
240
        rqstp->rq_res.page_len = w = nfsacl_size(
241
                (resp->mask & NFS_ACL)   ? resp->acl_access  : NULL,
242
                (resp->mask & NFS_DFACL) ? resp->acl_default : NULL);
243
        while (w > 0) {
244
                if (!rqstp->rq_respages[rqstp->rq_resused++])
245
                        return 0;
246
                w -= PAGE_SIZE;
247
        }
248
 
249
        n = nfsacl_encode(&rqstp->rq_res, base, inode,
250
                          resp->acl_access,
251
                          resp->mask & NFS_ACL, 0);
252
        if (n > 0)
253
                n = nfsacl_encode(&rqstp->rq_res, base + n, inode,
254
                                  resp->acl_default,
255
                                  resp->mask & NFS_DFACL,
256
                                  NFS_ACL_DEFAULT);
257
        if (n <= 0)
258
                return 0;
259
        return 1;
260
}
261
 
262
static int nfsaclsvc_encode_attrstatres(struct svc_rqst *rqstp, __be32 *p,
263
                struct nfsd_attrstat *resp)
264
{
265
        p = nfs2svc_encode_fattr(rqstp, p, &resp->fh);
266
        return xdr_ressize_check(rqstp, p);
267
}
268
 
269
/* ACCESS */
270
static int nfsaclsvc_encode_accessres(struct svc_rqst *rqstp, __be32 *p,
271
                struct nfsd3_accessres *resp)
272
{
273
        p = nfs2svc_encode_fattr(rqstp, p, &resp->fh);
274
        *p++ = htonl(resp->access);
275
        return xdr_ressize_check(rqstp, p);
276
}
277
 
278
/*
279
 * XDR release functions
280
 */
281
static int nfsaclsvc_release_getacl(struct svc_rqst *rqstp, __be32 *p,
282
                struct nfsd3_getaclres *resp)
283
{
284
        fh_put(&resp->fh);
285
        posix_acl_release(resp->acl_access);
286
        posix_acl_release(resp->acl_default);
287
        return 1;
288
}
289
 
290
static int nfsaclsvc_release_attrstat(struct svc_rqst *rqstp, __be32 *p,
291
                struct nfsd_attrstat *resp)
292
{
293
        fh_put(&resp->fh);
294
        return 1;
295
}
296
 
297
static int nfsaclsvc_release_access(struct svc_rqst *rqstp, __be32 *p,
298
               struct nfsd3_accessres *resp)
299
{
300
       fh_put(&resp->fh);
301
       return 1;
302
}
303
 
304
#define nfsaclsvc_decode_voidargs       NULL
305
#define nfsaclsvc_encode_voidres        NULL
306
#define nfsaclsvc_release_void          NULL
307
#define nfsd3_fhandleargs       nfsd_fhandle
308
#define nfsd3_attrstatres       nfsd_attrstat
309
#define nfsd3_voidres           nfsd3_voidargs
310
struct nfsd3_voidargs { int dummy; };
311
 
312
#define PROC(name, argt, rest, relt, cache, respsize)   \
313
 { (svc_procfunc) nfsacld_proc_##name,          \
314
   (kxdrproc_t) nfsaclsvc_decode_##argt##args,  \
315
   (kxdrproc_t) nfsaclsvc_encode_##rest##res,   \
316
   (kxdrproc_t) nfsaclsvc_release_##relt,               \
317
   sizeof(struct nfsd3_##argt##args),           \
318
   sizeof(struct nfsd3_##rest##res),            \
319
   0,                                            \
320
   cache,                                       \
321
   respsize,                                    \
322
 }
323
 
324
#define ST 1            /* status*/
325
#define AT 21           /* attributes */
326
#define pAT (1+AT)      /* post attributes - conditional */
327
#define ACL (1+NFS_ACL_MAX_ENTRIES*3)  /* Access Control List */
328
 
329
static struct svc_procedure             nfsd_acl_procedures2[] = {
330
  PROC(null,    void,           void,           void,     RC_NOCACHE, ST),
331
  PROC(getacl,  getacl,         getacl,         getacl,   RC_NOCACHE, ST+1+2*(1+ACL)),
332
  PROC(setacl,  setacl,         attrstat,       attrstat, RC_NOCACHE, ST+AT),
333
  PROC(getattr, fhandle,        attrstat,       attrstat, RC_NOCACHE, ST+AT),
334
  PROC(access,  access,         access,         access,   RC_NOCACHE, ST+AT+1),
335
};
336
 
337
struct svc_version      nfsd_acl_version2 = {
338
                .vs_vers        = 2,
339
                .vs_nproc       = 5,
340
                .vs_proc        = nfsd_acl_procedures2,
341
                .vs_dispatch    = nfsd_dispatch,
342
                .vs_xdrsize     = NFS3_SVC_XDRSIZE,
343
                .vs_hidden      = 1,
344
};

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