1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
|
/*
Unix SMB/CIFS implementation.
POSIX NTVFS backend
Copyright (C) Andrew Tridgell 2004
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
/*
this implements most of the POSIX NTVFS backend
This is the default backend
*/
#include "includes.h"
#include "vfs_posix.h"
#include "librpc/gen_ndr/security.h"
#include <tdb.h>
#include "lib/util/tdb_wrap.h"
#include "libcli/security/security.h"
#include "lib/events/events.h"
#include "param/param.h"
/*
setup config options for a posix share
*/
static void pvfs_setup_options(struct pvfs_state *pvfs)
{
struct share_config *scfg = pvfs->ntvfs->ctx->config;
const char *eadb;
bool def_perm_override = false;
if (share_bool_option(scfg, SHARE_MAP_HIDDEN, SHARE_MAP_HIDDEN_DEFAULT))
pvfs->flags |= PVFS_FLAG_MAP_HIDDEN;
if (share_bool_option(scfg, SHARE_MAP_ARCHIVE, SHARE_MAP_ARCHIVE_DEFAULT))
pvfs->flags |= PVFS_FLAG_MAP_ARCHIVE;
if (share_bool_option(scfg, SHARE_MAP_SYSTEM, SHARE_MAP_SYSTEM_DEFAULT))
pvfs->flags |= PVFS_FLAG_MAP_SYSTEM;
if (share_bool_option(scfg, SHARE_READONLY, SHARE_READONLY_DEFAULT))
pvfs->flags |= PVFS_FLAG_READONLY;
if (share_bool_option(scfg, SHARE_STRICT_SYNC, SHARE_STRICT_SYNC_DEFAULT))
pvfs->flags |= PVFS_FLAG_STRICT_SYNC;
if (share_bool_option(scfg, SHARE_STRICT_LOCKING, SHARE_STRICT_LOCKING_DEFAULT))
pvfs->flags |= PVFS_FLAG_STRICT_LOCKING;
if (share_bool_option(scfg, SHARE_CI_FILESYSTEM, SHARE_CI_FILESYSTEM_DEFAULT))
pvfs->flags |= PVFS_FLAG_CI_FILESYSTEM;
if (share_bool_option(scfg, PVFS_FAKE_OPLOCKS, PVFS_FAKE_OPLOCKS_DEFAULT))
pvfs->flags |= PVFS_FLAG_FAKE_OPLOCKS;
if (share_bool_option(scfg, PVFS_AIO, false))
pvfs->flags |= PVFS_FLAG_LINUX_AIO;
#if defined(O_DIRECTORY) && defined(O_NOFOLLOW)
/* set PVFS_PERM_OVERRIDE by default only if the system
* supports the necessary capabilities to make it secure
*/
def_perm_override = true;
#endif
if (share_bool_option(scfg, PVFS_PERM_OVERRIDE, def_perm_override))
pvfs->flags |= PVFS_FLAG_PERM_OVERRIDE;
/* file perm options */
pvfs->options.create_mask = share_int_option(scfg,
SHARE_CREATE_MASK,
SHARE_CREATE_MASK_DEFAULT);
pvfs->options.dir_mask = share_int_option(scfg,
SHARE_DIR_MASK,
SHARE_DIR_MASK_DEFAULT);
pvfs->options.force_dir_mode = share_int_option(scfg,
SHARE_FORCE_DIR_MODE,
SHARE_FORCE_DIR_MODE_DEFAULT);
pvfs->options.force_create_mode = share_int_option(scfg,
SHARE_FORCE_CREATE_MODE,
SHARE_FORCE_CREATE_MODE_DEFAULT);
/* this must be a power of 2 */
pvfs->alloc_size_rounding = share_int_option(scfg,
PVFS_ALLOCATION_ROUNDING,
PVFS_ALLOCATION_ROUNDING_DEFAULT);
pvfs->search.inactivity_time = share_int_option(scfg,
PVFS_SEARCH_INACTIVITY,
PVFS_SEARCH_INACTIVITY_DEFAULT);
#if HAVE_XATTR_SUPPORT
if (share_bool_option(scfg, PVFS_XATTR, PVFS_XATTR_DEFAULT))
pvfs->flags |= PVFS_FLAG_XATTR_ENABLE;
#endif
pvfs->sharing_violation_delay = share_int_option(scfg,
PVFS_SHARE_DELAY,
PVFS_SHARE_DELAY_DEFAULT);
pvfs->oplock_break_timeout = share_int_option(scfg,
PVFS_OPLOCK_TIMEOUT,
PVFS_OPLOCK_TIMEOUT_DEFAULT);
pvfs->writetime_delay = share_int_option(scfg,
PVFS_WRITETIME_DELAY,
PVFS_WRITETIME_DELAY_DEFAULT);
pvfs->share_name = talloc_strdup(pvfs, scfg->name);
pvfs->fs_attribs =
FS_ATTR_CASE_SENSITIVE_SEARCH |
FS_ATTR_CASE_PRESERVED_NAMES |
FS_ATTR_UNICODE_ON_DISK |
FS_ATTR_SPARSE_FILES;
/* allow xattrs to be stored in a external tdb */
eadb = share_string_option(scfg, PVFS_EADB, NULL);
if (eadb != NULL) {
pvfs->ea_db = tdb_wrap_open(pvfs, eadb, 50000,
TDB_DEFAULT, O_RDWR|O_CREAT, 0600);
if (pvfs->ea_db != NULL) {
pvfs->flags |= PVFS_FLAG_XATTR_ENABLE;
} else {
DEBUG(0,("Failed to open eadb '%s' - %s\n",
eadb, strerror(errno)));
pvfs->flags &= ~PVFS_FLAG_XATTR_ENABLE;
}
}
if (pvfs->flags & PVFS_FLAG_XATTR_ENABLE) {
pvfs->fs_attribs |= FS_ATTR_NAMED_STREAMS;
}
if (pvfs->flags & PVFS_FLAG_XATTR_ENABLE) {
pvfs->fs_attribs |= FS_ATTR_PERSISTANT_ACLS;
}
pvfs->sid_cache.creator_owner = dom_sid_parse_talloc(pvfs, SID_CREATOR_OWNER);
pvfs->sid_cache.creator_group = dom_sid_parse_talloc(pvfs, SID_CREATOR_GROUP);
/* check if the system really supports xattrs */
if (pvfs->flags & PVFS_FLAG_XATTR_ENABLE) {
pvfs_xattr_probe(pvfs);
}
/* enable an ACL backend */
pvfs->acl_ops = pvfs_acl_backend_byname(share_string_option(scfg, PVFS_ACL, "xattr"));
}
static int pvfs_state_destructor(struct pvfs_state *pvfs)
{
struct pvfs_file *f, *fn;
struct pvfs_search_state *s, *sn;
/*
* make sure we cleanup files and searches before anything else
* because there destructors need to acess the pvfs_state struct
*/
for (f=pvfs->files.list; f; f=fn) {
fn = f->next;
talloc_free(f);
}
for (s=pvfs->search.list; s; s=sn) {
sn = s->next;
talloc_free(s);
}
return 0;
}
/*
connect to a share - used when a tree_connect operation comes
in. For a disk based backend we needs to ensure that the base
directory exists (tho it doesn't need to be accessible by the user,
that comes later)
*/
static NTSTATUS pvfs_connect(struct ntvfs_module_context *ntvfs,
struct ntvfs_request *req,
union smb_tcon* tcon)
{
struct pvfs_state *pvfs;
struct stat st;
char *base_directory;
NTSTATUS status;
const char *sharename;
switch (tcon->generic.level) {
case RAW_TCON_TCON:
sharename = tcon->tcon.in.service;
break;
case RAW_TCON_TCONX:
sharename = tcon->tconx.in.path;
break;
case RAW_TCON_SMB2:
sharename = tcon->smb2.in.path;
break;
default:
return NT_STATUS_INVALID_LEVEL;
}
if (strncmp(sharename, "\\\\", 2) == 0) {
char *p = strchr(sharename+2, '\\');
if (p) {
sharename = p + 1;
}
}
/*
* TODO: call this from ntvfs_posix_init()
* but currently we don't have a lp_ctx there
*/
status = pvfs_acl_init();
NT_STATUS_NOT_OK_RETURN(status);
pvfs = talloc_zero(ntvfs, struct pvfs_state);
NT_STATUS_HAVE_NO_MEMORY(pvfs);
/* for simplicity of path construction, remove any trailing slash now */
base_directory = talloc_strdup(pvfs, share_string_option(ntvfs->ctx->config, SHARE_PATH, ""));
NT_STATUS_HAVE_NO_MEMORY(base_directory);
if (strcmp(base_directory, "/") != 0) {
trim_string(base_directory, NULL, "/");
}
pvfs->ntvfs = ntvfs;
pvfs->base_directory = base_directory;
/* the directory must exist. Note that we deliberately don't
check that it is readable */
if (stat(pvfs->base_directory, &st) != 0 || !S_ISDIR(st.st_mode)) {
DEBUG(0,("pvfs_connect: '%s' is not a directory, when connecting to [%s]\n",
pvfs->base_directory, sharename));
return NT_STATUS_BAD_NETWORK_NAME;
}
ntvfs->ctx->fs_type = talloc_strdup(ntvfs->ctx, "NTFS");
NT_STATUS_HAVE_NO_MEMORY(ntvfs->ctx->fs_type);
ntvfs->ctx->dev_type = talloc_strdup(ntvfs->ctx, "A:");
NT_STATUS_HAVE_NO_MEMORY(ntvfs->ctx->dev_type);
if (tcon->generic.level == RAW_TCON_TCONX) {
tcon->tconx.out.fs_type = ntvfs->ctx->fs_type;
tcon->tconx.out.dev_type = ntvfs->ctx->dev_type;
}
ntvfs->private_data = pvfs;
pvfs->brl_context = brlock_init(pvfs,
pvfs->ntvfs->ctx->server_id,
pvfs->ntvfs->ctx->lp_ctx,
pvfs->ntvfs->ctx->msg_ctx);
if (pvfs->brl_context == NULL) {
return NT_STATUS_INTERNAL_DB_CORRUPTION;
}
pvfs->odb_context = odb_init(pvfs, pvfs->ntvfs->ctx);
if (pvfs->odb_context == NULL) {
return NT_STATUS_INTERNAL_DB_CORRUPTION;
}
/* allow this to be NULL - we just disable change notify */
pvfs->notify_context = notify_init(pvfs,
pvfs->ntvfs->ctx->server_id,
pvfs->ntvfs->ctx->msg_ctx,
pvfs->ntvfs->ctx->lp_ctx,
pvfs->ntvfs->ctx->event_ctx,
pvfs->ntvfs->ctx->config);
pvfs->wbc_ctx = wbc_init(pvfs,
pvfs->ntvfs->ctx->msg_ctx,
pvfs->ntvfs->ctx->event_ctx);
if (pvfs->wbc_ctx == NULL) {
return NT_STATUS_INTERNAL_DB_CORRUPTION;
}
/* allocate the search handle -> ptr tree */
pvfs->search.idtree = idr_init(pvfs);
NT_STATUS_HAVE_NO_MEMORY(pvfs->search.idtree);
status = pvfs_mangle_init(pvfs);
NT_STATUS_NOT_OK_RETURN(status);
pvfs_setup_options(pvfs);
talloc_set_destructor(pvfs, pvfs_state_destructor);
#ifdef SIGXFSZ
/* who had the stupid idea to generate a signal on a large
file write instead of just failing it!? */
BlockSignals(true, SIGXFSZ);
#endif
return NT_STATUS_OK;
}
/*
disconnect from a share
*/
static NTSTATUS pvfs_disconnect(struct ntvfs_module_context *ntvfs)
{
return NT_STATUS_OK;
}
/*
check if a directory exists
*/
static NTSTATUS pvfs_chkpath(struct ntvfs_module_context *ntvfs,
struct ntvfs_request *req,
union smb_chkpath *cp)
{
struct pvfs_state *pvfs = talloc_get_type(ntvfs->private_data,
struct pvfs_state);
struct pvfs_filename *name;
NTSTATUS status;
/* resolve the cifs name to a posix name */
status = pvfs_resolve_name(pvfs, req, cp->chkpath.in.path, 0, &name);
NT_STATUS_NOT_OK_RETURN(status);
if (!name->exists) {
return NT_STATUS_OBJECT_NAME_NOT_FOUND;
}
if (!S_ISDIR(name->st.st_mode)) {
return NT_STATUS_NOT_A_DIRECTORY;
}
return NT_STATUS_OK;
}
/*
copy a set of files
*/
static NTSTATUS pvfs_copy(struct ntvfs_module_context *ntvfs,
struct ntvfs_request *req, struct smb_copy *cp)
{
DEBUG(0,("pvfs_copy not implemented\n"));
return NT_STATUS_NOT_SUPPORTED;
}
/*
return print queue info
*/
static NTSTATUS pvfs_lpq(struct ntvfs_module_context *ntvfs,
struct ntvfs_request *req, union smb_lpq *lpq)
{
return NT_STATUS_NOT_SUPPORTED;
}
/* SMBtrans - not used on file shares */
static NTSTATUS pvfs_trans(struct ntvfs_module_context *ntvfs,
struct ntvfs_request *req, struct smb_trans2 *trans2)
{
return NT_STATUS_ACCESS_DENIED;
}
/*
initialialise the POSIX disk backend, registering ourselves with the ntvfs subsystem
*/
NTSTATUS ntvfs_posix_init(void)
{
NTSTATUS ret;
struct ntvfs_ops ops;
NTVFS_CURRENT_CRITICAL_SIZES(vers);
ZERO_STRUCT(ops);
ops.type = NTVFS_DISK;
/* fill in all the operations */
ops.connect = pvfs_connect;
ops.disconnect = pvfs_disconnect;
ops.unlink = pvfs_unlink;
ops.chkpath = pvfs_chkpath;
ops.qpathinfo = pvfs_qpathinfo;
ops.setpathinfo = pvfs_setpathinfo;
ops.open = pvfs_open;
ops.mkdir = pvfs_mkdir;
ops.rmdir = pvfs_rmdir;
ops.rename = pvfs_rename;
ops.copy = pvfs_copy;
ops.ioctl = pvfs_ioctl;
ops.read = pvfs_read;
ops.write = pvfs_write;
ops.seek = pvfs_seek;
ops.flush = pvfs_flush;
ops.close = pvfs_close;
ops.exit = pvfs_exit;
ops.lock = pvfs_lock;
ops.setfileinfo = pvfs_setfileinfo;
ops.qfileinfo = pvfs_qfileinfo;
ops.fsinfo = pvfs_fsinfo;
ops.lpq = pvfs_lpq;
ops.search_first = pvfs_search_first;
ops.search_next = pvfs_search_next;
ops.search_close = pvfs_search_close;
ops.trans = pvfs_trans;
ops.logoff = pvfs_logoff;
ops.async_setup = pvfs_async_setup;
ops.cancel = pvfs_cancel;
ops.notify = pvfs_notify;
/* register ourselves with the NTVFS subsystem. We register
under the name 'default' as we wish to be the default
backend, and also register as 'posix' */
ops.name = "default";
ret = ntvfs_register(&ops, &vers);
if (!NT_STATUS_IS_OK(ret)) {
DEBUG(0,("Failed to register POSIX backend as '%s'!\n", ops.name));
}
ops.name = "posix";
ret = ntvfs_register(&ops, &vers);
if (!NT_STATUS_IS_OK(ret)) {
DEBUG(0,("Failed to register POSIX backend as '%s'!\n", ops.name));
}
if (NT_STATUS_IS_OK(ret)) {
ret = ntvfs_common_init();
}
return ret;
}
|