source: vendor/current/source4/ntvfs/posix/vfs_posix.c@ 740

Last change on this file since 740 was 740, checked in by Silvan Scherrer, 12 years ago

Samba Server: update vendor to 3.6.0
File size: 12.3 KB
Line 
1/*
2 Unix SMB/CIFS implementation.
3
4 POSIX NTVFS backend
5
6 Copyright (C) Andrew Tridgell 2004
7
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 3 of the License, or
11 (at your option) any later version.
12
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
17
18 You should have received a copy of the GNU General Public License
19 along with this program. If not, see <http://www.gnu.org/licenses/>.
20*/
21/*
22 this implements most of the POSIX NTVFS backend
23 This is the default backend
24*/
25
26#include "includes.h"
27#include "vfs_posix.h"
28#include "librpc/gen_ndr/security.h"
29#include <tdb.h>
30#include "lib/util/tdb_wrap.h"
31#include "libcli/security/security.h"
32#include "lib/events/events.h"
33#include "param/param.h"
34
35/*
36 setup config options for a posix share
37*/
38static void pvfs_setup_options(struct pvfs_state *pvfs)
39{
40 struct share_config *scfg = pvfs->ntvfs->ctx->config;
41 const char *eadb;
42 bool def_perm_override = false;
43
44 if (share_bool_option(scfg, SHARE_MAP_HIDDEN, SHARE_MAP_HIDDEN_DEFAULT))
45 pvfs->flags |= PVFS_FLAG_MAP_HIDDEN;
46 if (share_bool_option(scfg, SHARE_MAP_ARCHIVE, SHARE_MAP_ARCHIVE_DEFAULT))
47 pvfs->flags |= PVFS_FLAG_MAP_ARCHIVE;
48 if (share_bool_option(scfg, SHARE_MAP_SYSTEM, SHARE_MAP_SYSTEM_DEFAULT))
49 pvfs->flags |= PVFS_FLAG_MAP_SYSTEM;
50 if (share_bool_option(scfg, SHARE_READONLY, SHARE_READONLY_DEFAULT))
51 pvfs->flags |= PVFS_FLAG_READONLY;
52 if (share_bool_option(scfg, SHARE_STRICT_SYNC, SHARE_STRICT_SYNC_DEFAULT))
53 pvfs->flags |= PVFS_FLAG_STRICT_SYNC;
54 if (share_bool_option(scfg, SHARE_STRICT_LOCKING, SHARE_STRICT_LOCKING_DEFAULT))
55 pvfs->flags |= PVFS_FLAG_STRICT_LOCKING;
56 if (share_bool_option(scfg, SHARE_CI_FILESYSTEM, SHARE_CI_FILESYSTEM_DEFAULT))
57 pvfs->flags |= PVFS_FLAG_CI_FILESYSTEM;
58 if (share_bool_option(scfg, PVFS_FAKE_OPLOCKS, PVFS_FAKE_OPLOCKS_DEFAULT))
59 pvfs->flags |= PVFS_FLAG_FAKE_OPLOCKS;
60 if (share_bool_option(scfg, PVFS_AIO, false))
61 pvfs->flags |= PVFS_FLAG_LINUX_AIO;
62
63#if defined(O_DIRECTORY) && defined(O_NOFOLLOW)
64 /* set PVFS_PERM_OVERRIDE by default only if the system
65 * supports the necessary capabilities to make it secure
66 */
67 def_perm_override = true;
68#endif
69 if (share_bool_option(scfg, PVFS_PERM_OVERRIDE, def_perm_override))
70 pvfs->flags |= PVFS_FLAG_PERM_OVERRIDE;
71
72 /* file perm options */
73 pvfs->options.create_mask = share_int_option(scfg,
74 SHARE_CREATE_MASK,
75 SHARE_CREATE_MASK_DEFAULT);
76 pvfs->options.dir_mask = share_int_option(scfg,
77 SHARE_DIR_MASK,
78 SHARE_DIR_MASK_DEFAULT);
79 pvfs->options.force_dir_mode = share_int_option(scfg,
80 SHARE_FORCE_DIR_MODE,
81 SHARE_FORCE_DIR_MODE_DEFAULT);
82 pvfs->options.force_create_mode = share_int_option(scfg,
83 SHARE_FORCE_CREATE_MODE,
84 SHARE_FORCE_CREATE_MODE_DEFAULT);
85 /* this must be a power of 2 */
86 pvfs->alloc_size_rounding = share_int_option(scfg,
87 PVFS_ALLOCATION_ROUNDING,
88 PVFS_ALLOCATION_ROUNDING_DEFAULT);
89
90 pvfs->search.inactivity_time = share_int_option(scfg,
91 PVFS_SEARCH_INACTIVITY,
92 PVFS_SEARCH_INACTIVITY_DEFAULT);
93
94#if HAVE_XATTR_SUPPORT
95 if (share_bool_option(scfg, PVFS_XATTR, PVFS_XATTR_DEFAULT))
96 pvfs->flags |= PVFS_FLAG_XATTR_ENABLE;
97#endif
98
99 pvfs->sharing_violation_delay = share_int_option(scfg,
100 PVFS_SHARE_DELAY,
101 PVFS_SHARE_DELAY_DEFAULT);
102
103 pvfs->oplock_break_timeout = share_int_option(scfg,
104 PVFS_OPLOCK_TIMEOUT,
105 PVFS_OPLOCK_TIMEOUT_DEFAULT);
106
107 pvfs->writetime_delay = share_int_option(scfg,
108 PVFS_WRITETIME_DELAY,
109 PVFS_WRITETIME_DELAY_DEFAULT);
110
111 pvfs->share_name = talloc_strdup(pvfs, scfg->name);
112
113 pvfs->fs_attribs =
114 FS_ATTR_CASE_SENSITIVE_SEARCH |
115 FS_ATTR_CASE_PRESERVED_NAMES |
116 FS_ATTR_UNICODE_ON_DISK |
117 FS_ATTR_SPARSE_FILES;
118
119 /* allow xattrs to be stored in a external tdb */
120 eadb = share_string_option(scfg, PVFS_EADB, NULL);
121 if (eadb != NULL) {
122 pvfs->ea_db = tdb_wrap_open(pvfs, eadb, 50000,
123 TDB_DEFAULT, O_RDWR|O_CREAT, 0600);
124 if (pvfs->ea_db != NULL) {
125 pvfs->flags |= PVFS_FLAG_XATTR_ENABLE;
126 } else {
127 DEBUG(0,("Failed to open eadb '%s' - %s\n",
128 eadb, strerror(errno)));
129 pvfs->flags &= ~PVFS_FLAG_XATTR_ENABLE;
130 }
131 }
132
133 if (pvfs->flags & PVFS_FLAG_XATTR_ENABLE) {
134 pvfs->fs_attribs |= FS_ATTR_NAMED_STREAMS;
135 }
136 if (pvfs->flags & PVFS_FLAG_XATTR_ENABLE) {
137 pvfs->fs_attribs |= FS_ATTR_PERSISTANT_ACLS;
138 }
139
140 pvfs->sid_cache.creator_owner = dom_sid_parse_talloc(pvfs, SID_CREATOR_OWNER);
141 pvfs->sid_cache.creator_group = dom_sid_parse_talloc(pvfs, SID_CREATOR_GROUP);
142
143 /* check if the system really supports xattrs */
144 if (pvfs->flags & PVFS_FLAG_XATTR_ENABLE) {
145 pvfs_xattr_probe(pvfs);
146 }
147
148 /* enable an ACL backend */
149 pvfs->acl_ops = pvfs_acl_backend_byname(share_string_option(scfg, PVFS_ACL, "xattr"));
150}
151
152static int pvfs_state_destructor(struct pvfs_state *pvfs)
153{
154 struct pvfs_file *f, *fn;
155 struct pvfs_search_state *s, *sn;
156
157 /*
158 * make sure we cleanup files and searches before anything else
159 * because there destructors need to acess the pvfs_state struct
160 */
161 for (f=pvfs->files.list; f; f=fn) {
162 fn = f->next;
163 talloc_free(f);
164 }
165
166 for (s=pvfs->search.list; s; s=sn) {
167 sn = s->next;
168 talloc_free(s);
169 }
170
171 return 0;
172}
173
174/*
175 connect to a share - used when a tree_connect operation comes
176 in. For a disk based backend we needs to ensure that the base
177 directory exists (tho it doesn't need to be accessible by the user,
178 that comes later)
179*/
180static NTSTATUS pvfs_connect(struct ntvfs_module_context *ntvfs,
181 struct ntvfs_request *req,
182 union smb_tcon* tcon)
183{
184 struct pvfs_state *pvfs;
185 struct stat st;
186 char *base_directory;
187 NTSTATUS status;
188 const char *sharename;
189
190 switch (tcon->generic.level) {
191 case RAW_TCON_TCON:
192 sharename = tcon->tcon.in.service;
193 break;
194 case RAW_TCON_TCONX:
195 sharename = tcon->tconx.in.path;
196 break;
197 case RAW_TCON_SMB2:
198 sharename = tcon->smb2.in.path;
199 break;
200 default:
201 return NT_STATUS_INVALID_LEVEL;
202 }
203
204 if (strncmp(sharename, "\\\\", 2) == 0) {
205 char *p = strchr(sharename+2, '\\');
206 if (p) {
207 sharename = p + 1;
208 }
209 }
210
211 /*
212 * TODO: call this from ntvfs_posix_init()
213 * but currently we don't have a lp_ctx there
214 */
215 status = pvfs_acl_init(ntvfs->ctx->lp_ctx);
216 NT_STATUS_NOT_OK_RETURN(status);
217
218 pvfs = talloc_zero(ntvfs, struct pvfs_state);
219 NT_STATUS_HAVE_NO_MEMORY(pvfs);
220
221 /* for simplicity of path construction, remove any trailing slash now */
222 base_directory = talloc_strdup(pvfs, share_string_option(ntvfs->ctx->config, SHARE_PATH, ""));
223 NT_STATUS_HAVE_NO_MEMORY(base_directory);
224 if (strcmp(base_directory, "/") != 0) {
225 trim_string(base_directory, NULL, "/");
226 }
227
228 pvfs->ntvfs = ntvfs;
229 pvfs->base_directory = base_directory;
230
231 /* the directory must exist. Note that we deliberately don't
232 check that it is readable */
233 if (stat(pvfs->base_directory, &st) != 0 || !S_ISDIR(st.st_mode)) {
234 DEBUG(0,("pvfs_connect: '%s' is not a directory, when connecting to [%s]\n",
235 pvfs->base_directory, sharename));
236 return NT_STATUS_BAD_NETWORK_NAME;
237 }
238
239 ntvfs->ctx->fs_type = talloc_strdup(ntvfs->ctx, "NTFS");
240 NT_STATUS_HAVE_NO_MEMORY(ntvfs->ctx->fs_type);
241
242 ntvfs->ctx->dev_type = talloc_strdup(ntvfs->ctx, "A:");
243 NT_STATUS_HAVE_NO_MEMORY(ntvfs->ctx->dev_type);
244
245 if (tcon->generic.level == RAW_TCON_TCONX) {
246 tcon->tconx.out.fs_type = ntvfs->ctx->fs_type;
247 tcon->tconx.out.dev_type = ntvfs->ctx->dev_type;
248 }
249
250 ntvfs->private_data = pvfs;
251
252 pvfs->brl_context = brl_init(pvfs,
253 pvfs->ntvfs->ctx->server_id,
254 pvfs->ntvfs->ctx->lp_ctx,
255 pvfs->ntvfs->ctx->msg_ctx);
256 if (pvfs->brl_context == NULL) {
257 return NT_STATUS_INTERNAL_DB_CORRUPTION;
258 }
259
260 pvfs->odb_context = odb_init(pvfs, pvfs->ntvfs->ctx);
261 if (pvfs->odb_context == NULL) {
262 return NT_STATUS_INTERNAL_DB_CORRUPTION;
263 }
264
265 /* allow this to be NULL - we just disable change notify */
266 pvfs->notify_context = notify_init(pvfs,
267 pvfs->ntvfs->ctx->server_id,
268 pvfs->ntvfs->ctx->msg_ctx,
269 pvfs->ntvfs->ctx->lp_ctx,
270 pvfs->ntvfs->ctx->event_ctx,
271 pvfs->ntvfs->ctx->config);
272
273 pvfs->wbc_ctx = wbc_init(pvfs,
274 pvfs->ntvfs->ctx->msg_ctx,
275 pvfs->ntvfs->ctx->event_ctx);
276 if (pvfs->wbc_ctx == NULL) {
277 return NT_STATUS_INTERNAL_DB_CORRUPTION;
278 }
279
280 /* allocate the search handle -> ptr tree */
281 pvfs->search.idtree = idr_init(pvfs);
282 NT_STATUS_HAVE_NO_MEMORY(pvfs->search.idtree);
283
284 status = pvfs_mangle_init(pvfs);
285 NT_STATUS_NOT_OK_RETURN(status);
286
287 pvfs_setup_options(pvfs);
288
289 talloc_set_destructor(pvfs, pvfs_state_destructor);
290
291#ifdef SIGXFSZ
292 /* who had the stupid idea to generate a signal on a large
293 file write instead of just failing it!? */
294 BlockSignals(true, SIGXFSZ);
295#endif
296
297 return NT_STATUS_OK;
298}
299
300/*
301 disconnect from a share
302*/
303static NTSTATUS pvfs_disconnect(struct ntvfs_module_context *ntvfs)
304{
305 return NT_STATUS_OK;
306}
307
308/*
309 check if a directory exists
310*/
311static NTSTATUS pvfs_chkpath(struct ntvfs_module_context *ntvfs,
312 struct ntvfs_request *req,
313 union smb_chkpath *cp)
314{
315 struct pvfs_state *pvfs = talloc_get_type(ntvfs->private_data,
316 struct pvfs_state);
317 struct pvfs_filename *name;
318 NTSTATUS status;
319
320 /* resolve the cifs name to a posix name */
321 status = pvfs_resolve_name(pvfs, req, cp->chkpath.in.path, 0, &name);
322 NT_STATUS_NOT_OK_RETURN(status);
323
324 if (!name->exists) {
325 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
326 }
327
328 if (!S_ISDIR(name->st.st_mode)) {
329 return NT_STATUS_NOT_A_DIRECTORY;
330 }
331
332 return NT_STATUS_OK;
333}
334
335/*
336 copy a set of files
337*/
338static NTSTATUS pvfs_copy(struct ntvfs_module_context *ntvfs,
339 struct ntvfs_request *req, struct smb_copy *cp)
340{
341 DEBUG(0,("pvfs_copy not implemented\n"));
342 return NT_STATUS_NOT_SUPPORTED;
343}
344
345/*
346 return print queue info
347*/
348static NTSTATUS pvfs_lpq(struct ntvfs_module_context *ntvfs,
349 struct ntvfs_request *req, union smb_lpq *lpq)
350{
351 return NT_STATUS_NOT_SUPPORTED;
352}
353
354/* SMBtrans - not used on file shares */
355static NTSTATUS pvfs_trans(struct ntvfs_module_context *ntvfs,
356 struct ntvfs_request *req, struct smb_trans2 *trans2)
357{
358 return NT_STATUS_ACCESS_DENIED;
359}
360
361/*
362 initialialise the POSIX disk backend, registering ourselves with the ntvfs subsystem
363 */
364NTSTATUS ntvfs_posix_init(void)
365{
366 NTSTATUS ret;
367 struct ntvfs_ops ops;
368 NTVFS_CURRENT_CRITICAL_SIZES(vers);
369
370 ZERO_STRUCT(ops);
371
372 ops.type = NTVFS_DISK;
373
374 /* fill in all the operations */
375 ops.connect = pvfs_connect;
376 ops.disconnect = pvfs_disconnect;
377 ops.unlink = pvfs_unlink;
378 ops.chkpath = pvfs_chkpath;
379 ops.qpathinfo = pvfs_qpathinfo;
380 ops.setpathinfo = pvfs_setpathinfo;
381 ops.open = pvfs_open;
382 ops.mkdir = pvfs_mkdir;
383 ops.rmdir = pvfs_rmdir;
384 ops.rename = pvfs_rename;
385 ops.copy = pvfs_copy;
386 ops.ioctl = pvfs_ioctl;
387 ops.read = pvfs_read;
388 ops.write = pvfs_write;
389 ops.seek = pvfs_seek;
390 ops.flush = pvfs_flush;
391 ops.close = pvfs_close;
392 ops.exit = pvfs_exit;
393 ops.lock = pvfs_lock;
394 ops.setfileinfo = pvfs_setfileinfo;
395 ops.qfileinfo = pvfs_qfileinfo;
396 ops.fsinfo = pvfs_fsinfo;
397 ops.lpq = pvfs_lpq;
398 ops.search_first = pvfs_search_first;
399 ops.search_next = pvfs_search_next;
400 ops.search_close = pvfs_search_close;
401 ops.trans = pvfs_trans;
402 ops.logoff = pvfs_logoff;
403 ops.async_setup = pvfs_async_setup;
404 ops.cancel = pvfs_cancel;
405 ops.notify = pvfs_notify;
406
407 /* register ourselves with the NTVFS subsystem. We register
408 under the name 'default' as we wish to be the default
409 backend, and also register as 'posix' */
410 ops.name = "default";
411 ret = ntvfs_register(&ops, &vers);
412
413 if (!NT_STATUS_IS_OK(ret)) {
414 DEBUG(0,("Failed to register POSIX backend as '%s'!\n", ops.name));
415 }
416
417 ops.name = "posix";
418 ret = ntvfs_register(&ops, &vers);
419
420 if (!NT_STATUS_IS_OK(ret)) {
421 DEBUG(0,("Failed to register POSIX backend as '%s'!\n", ops.name));
422 }
423
424 if (NT_STATUS_IS_OK(ret)) {
425 ret = ntvfs_common_init();
426 }
427
428 return ret;
429}
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