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smbd: Remove superfluous ()
[Samba.git] / source4 / ntvfs / posix / vfs_posix.c
blob304a9ff8fe58063c12c69c93079fac417dd28fb9
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_compat.h"
30 #include "lib/tdb_wrap/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 */
38 static void pvfs_setup_options(struct pvfs_state *pvfs)
39 {
40 struct share_config *scfg = pvfs->ntvfs->ctx->config;
41 char *eadb;
42 char *xattr_backend;
43 bool def_perm_override = false;
44
45 if (share_bool_option(scfg, SHARE_MAP_HIDDEN, SHARE_MAP_HIDDEN_DEFAULT))
46 pvfs->flags |= PVFS_FLAG_MAP_HIDDEN;
47 if (share_bool_option(scfg, SHARE_MAP_ARCHIVE, SHARE_MAP_ARCHIVE_DEFAULT))
48 pvfs->flags |= PVFS_FLAG_MAP_ARCHIVE;
49 if (share_bool_option(scfg, SHARE_MAP_SYSTEM, SHARE_MAP_SYSTEM_DEFAULT))
50 pvfs->flags |= PVFS_FLAG_MAP_SYSTEM;
51 if (share_bool_option(scfg, SHARE_READONLY, SHARE_READONLY_DEFAULT))
52 pvfs->flags |= PVFS_FLAG_READONLY;
53 if (share_bool_option(scfg, SHARE_STRICT_SYNC, SHARE_STRICT_SYNC_DEFAULT))
54 pvfs->flags |= PVFS_FLAG_STRICT_SYNC;
55 if (share_bool_option(scfg, SHARE_STRICT_LOCKING, SHARE_STRICT_LOCKING_DEFAULT))
56 pvfs->flags |= PVFS_FLAG_STRICT_LOCKING;
57 if (share_bool_option(scfg, SHARE_CI_FILESYSTEM, SHARE_CI_FILESYSTEM_DEFAULT))
58 pvfs->flags |= PVFS_FLAG_CI_FILESYSTEM;
59 if (share_bool_option(scfg, PVFS_FAKE_OPLOCKS, PVFS_FAKE_OPLOCKS_DEFAULT))
60 pvfs->flags |= PVFS_FLAG_FAKE_OPLOCKS;
61 if (share_bool_option(scfg, PVFS_AIO, false))
62 pvfs->flags |= PVFS_FLAG_LINUX_AIO;
63
64 #if defined(O_DIRECTORY) && defined(O_NOFOLLOW)
65 /* set PVFS_PERM_OVERRIDE by default only if the system
66 * supports the necessary capabilities to make it secure
67 */
68 def_perm_override = true;
69 #endif
70 if (share_bool_option(scfg, PVFS_PERM_OVERRIDE, def_perm_override))
71 pvfs->flags |= PVFS_FLAG_PERM_OVERRIDE;
72
73 /* file perm options */
74 pvfs->options.create_mask = share_int_option(scfg,
75 SHARE_CREATE_MASK,
76 SHARE_CREATE_MASK_DEFAULT);
77 pvfs->options.dir_mask = share_int_option(scfg,
78 SHARE_DIR_MASK,
79 SHARE_DIR_MASK_DEFAULT);
80 pvfs->options.force_dir_mode = share_int_option(scfg,
81 SHARE_FORCE_DIR_MODE,
82 SHARE_FORCE_DIR_MODE_DEFAULT);
83 pvfs->options.force_create_mode = share_int_option(scfg,
84 SHARE_FORCE_CREATE_MODE,
85 SHARE_FORCE_CREATE_MODE_DEFAULT);
86 /* this must be a power of 2 */
87 pvfs->alloc_size_rounding = share_int_option(scfg,
88 PVFS_ALLOCATION_ROUNDING,
89 PVFS_ALLOCATION_ROUNDING_DEFAULT);
90
91 pvfs->search.inactivity_time = share_int_option(scfg,
92 PVFS_SEARCH_INACTIVITY,
93 PVFS_SEARCH_INACTIVITY_DEFAULT);
94
95 #if HAVE_XATTR_SUPPORT
96 if (share_bool_option(scfg, PVFS_XATTR, PVFS_XATTR_DEFAULT))
97 pvfs->flags |= PVFS_FLAG_XATTR_ENABLE;
98 #endif
99
100 pvfs->sharing_violation_delay = share_int_option(scfg,
101 PVFS_SHARE_DELAY,
102 PVFS_SHARE_DELAY_DEFAULT);
103
104 pvfs->oplock_break_timeout = share_int_option(scfg,
105 PVFS_OPLOCK_TIMEOUT,
106 PVFS_OPLOCK_TIMEOUT_DEFAULT);
107
108 pvfs->writetime_delay = share_int_option(scfg,
109 PVFS_WRITETIME_DELAY,
110 PVFS_WRITETIME_DELAY_DEFAULT);
111
112 pvfs->share_name = talloc_strdup(pvfs, scfg->name);
113
114 pvfs->fs_attribs =
115 FS_ATTR_CASE_SENSITIVE_SEARCH |
116 FS_ATTR_CASE_PRESERVED_NAMES |
117 FS_ATTR_UNICODE_ON_DISK |
118 FS_ATTR_SPARSE_FILES;
119
120 /* allow xattrs to be stored in a external tdb */
121 eadb = share_string_option(pvfs, scfg, PVFS_EADB, NULL);
122 if (eadb != NULL) {
123 pvfs->ea_db = tdb_wrap_open(
124 pvfs, eadb, 50000,
125 lpcfg_tdb_flags(pvfs->ntvfs->ctx->lp_ctx, TDB_DEFAULT),
126 O_RDWR|O_CREAT, 0600);
127 TALLOC_FREE(eadb);
128 if (pvfs->ea_db != NULL) {
129 pvfs->flags |= PVFS_FLAG_XATTR_ENABLE;
130 } else {
131 DEBUG(0,("Failed to open eadb '%s' - %s\n",
132 eadb, strerror(errno)));
133 pvfs->flags &= ~PVFS_FLAG_XATTR_ENABLE;
134 }
135 }
136
137 if (pvfs->flags & PVFS_FLAG_XATTR_ENABLE) {
138 pvfs->fs_attribs |= FS_ATTR_NAMED_STREAMS;
139 }
140 if (pvfs->flags & PVFS_FLAG_XATTR_ENABLE) {
141 pvfs->fs_attribs |= FS_ATTR_PERSISTANT_ACLS;
142 }
143
144 pvfs->sid_cache.creator_owner = dom_sid_parse_talloc(pvfs, SID_CREATOR_OWNER);
145 pvfs->sid_cache.creator_group = dom_sid_parse_talloc(pvfs, SID_CREATOR_GROUP);
146
147 /* check if the system really supports xattrs */
148 if (pvfs->flags & PVFS_FLAG_XATTR_ENABLE) {
149 pvfs_xattr_probe(pvfs);
150 }
151
152 /* enable an ACL backend */
153 xattr_backend = share_string_option(pvfs, scfg, PVFS_ACL, "xattr");
154 pvfs->acl_ops = pvfs_acl_backend_byname(xattr_backend);
155 TALLOC_FREE(xattr_backend);
156 }
157
158 static int pvfs_state_destructor(struct pvfs_state *pvfs)
159 {
160 struct pvfs_file *f, *fn;
161 struct pvfs_search_state *s, *sn;
162
163 /*
164 * make sure we cleanup files and searches before anything else
165 * because there destructors need to acess the pvfs_state struct
166 */
167 for (f=pvfs->files.list; f; f=fn) {
168 fn = f->next;
169 talloc_free(f);
170 }
171
172 for (s=pvfs->search.list; s; s=sn) {
173 sn = s->next;
174 talloc_free(s);
175 }
176
177 return 0;
178 }
179
180 /*
181 connect to a share - used when a tree_connect operation comes
182 in. For a disk based backend we needs to ensure that the base
183 directory exists (tho it doesn't need to be accessible by the user,
184 that comes later)
185 */
186 static NTSTATUS pvfs_connect(struct ntvfs_module_context *ntvfs,
187 struct ntvfs_request *req,
188 union smb_tcon* tcon)
189 {
190 struct pvfs_state *pvfs;
191 struct stat st;
192 char *base_directory;
193 NTSTATUS status;
194 const char *sharename;
195
196 switch (tcon->generic.level) {
197 case RAW_TCON_TCON:
198 sharename = tcon->tcon.in.service;
199 break;
200 case RAW_TCON_TCONX:
201 sharename = tcon->tconx.in.path;
202 break;
203 case RAW_TCON_SMB2:
204 sharename = tcon->smb2.in.path;
205 break;
206 default:
207 return NT_STATUS_INVALID_LEVEL;
208 }
209
210 if (strncmp(sharename, "\\\\", 2) == 0) {
211 char *p = strchr(sharename+2, '\\');
212 if (p) {
213 sharename = p + 1;
214 }
215 }
216
217 /*
218 * TODO: call this from ntvfs_posix_init()
219 * but currently we don't have a lp_ctx there
220 */
221 status = pvfs_acl_init();
222 NT_STATUS_NOT_OK_RETURN(status);
223
224 pvfs = talloc_zero(ntvfs, struct pvfs_state);
225 NT_STATUS_HAVE_NO_MEMORY(pvfs);
226
227 /* for simplicity of path construction, remove any trailing slash now */
228 base_directory = share_string_option(pvfs, ntvfs->ctx->config, SHARE_PATH, "");
229 NT_STATUS_HAVE_NO_MEMORY(base_directory);
230 if (strcmp(base_directory, "/") != 0) {
231 trim_string(base_directory, NULL, "/");
232 }
233
234 pvfs->ntvfs = ntvfs;
235 pvfs->base_directory = base_directory;
236
237 /* the directory must exist. Note that we deliberately don't
238 check that it is readable */
239 if (stat(pvfs->base_directory, &st) != 0 || !S_ISDIR(st.st_mode)) {
240 DEBUG(0,("pvfs_connect: '%s' is not a directory, when connecting to [%s]\n",
241 pvfs->base_directory, sharename));
242 return NT_STATUS_BAD_NETWORK_NAME;
243 }
244
245 ntvfs->ctx->fs_type = talloc_strdup(ntvfs->ctx, "NTFS");
246 NT_STATUS_HAVE_NO_MEMORY(ntvfs->ctx->fs_type);
247
248 ntvfs->ctx->dev_type = talloc_strdup(ntvfs->ctx, "A:");
249 NT_STATUS_HAVE_NO_MEMORY(ntvfs->ctx->dev_type);
250
251 if (tcon->generic.level == RAW_TCON_TCONX) {
252 tcon->tconx.out.fs_type = ntvfs->ctx->fs_type;
253 tcon->tconx.out.dev_type = ntvfs->ctx->dev_type;
254 }
255
256 ntvfs->private_data = pvfs;
257
258 pvfs->brl_context = brlock_init(pvfs,
259 pvfs->ntvfs->ctx->server_id,
260 pvfs->ntvfs->ctx->lp_ctx,
261 pvfs->ntvfs->ctx->msg_ctx);
262 if (pvfs->brl_context == NULL) {
263 return NT_STATUS_INTERNAL_DB_CORRUPTION;
264 }
265
266 pvfs->odb_context = odb_init(pvfs, pvfs->ntvfs->ctx);
267 if (pvfs->odb_context == NULL) {
268 return NT_STATUS_INTERNAL_DB_CORRUPTION;
269 }
270
271 /* allow this to be NULL - we just disable change notify */
272 pvfs->notify_context = notify_init(pvfs,
273 pvfs->ntvfs->ctx->server_id,
274 pvfs->ntvfs->ctx->msg_ctx,
275 pvfs->ntvfs->ctx->lp_ctx,
276 pvfs->ntvfs->ctx->event_ctx,
277 pvfs->ntvfs->ctx->config);
278
279 /* allocate the search handle -> ptr tree */
280 pvfs->search.idtree = idr_init(pvfs);
281 NT_STATUS_HAVE_NO_MEMORY(pvfs->search.idtree);
282
283 status = pvfs_mangle_init(pvfs);
284 NT_STATUS_NOT_OK_RETURN(status);
285
286 pvfs_setup_options(pvfs);
287
288 talloc_set_destructor(pvfs, pvfs_state_destructor);
289
290 #ifdef SIGXFSZ
291 /* who had the stupid idea to generate a signal on a large
292 file write instead of just failing it!? */
293 BlockSignals(true, SIGXFSZ);
294 #endif
295
296 return NT_STATUS_OK;
297 }
298
299 /*
300 disconnect from a share
301 */
302 static NTSTATUS pvfs_disconnect(struct ntvfs_module_context *ntvfs)
303 {
304 return NT_STATUS_OK;
305 }
306
307 /*
308 check if a directory exists
309 */
310 static NTSTATUS pvfs_chkpath(struct ntvfs_module_context *ntvfs,
311 struct ntvfs_request *req,
312 union smb_chkpath *cp)
313 {
314 struct pvfs_state *pvfs = talloc_get_type(ntvfs->private_data,
315 struct pvfs_state);
316 struct pvfs_filename *name;
317 NTSTATUS status;
318
319 /* resolve the cifs name to a posix name */
320 status = pvfs_resolve_name(pvfs, req, cp->chkpath.in.path, 0, &name);
321 NT_STATUS_NOT_OK_RETURN(status);
322
323 if (!name->exists) {
324 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
325 }
326
327 if (!S_ISDIR(name->st.st_mode)) {
328 return NT_STATUS_NOT_A_DIRECTORY;
329 }
330
331 return NT_STATUS_OK;
332 }
333
334 /*
335 copy a set of files
336 */
337 static NTSTATUS pvfs_copy(struct ntvfs_module_context *ntvfs,
338 struct ntvfs_request *req, struct smb_copy *cp)
339 {
340 DEBUG(0,("pvfs_copy not implemented\n"));
341 return NT_STATUS_NOT_SUPPORTED;
342 }
343
344 /*
345 return print queue info
346 */
347 static NTSTATUS pvfs_lpq(struct ntvfs_module_context *ntvfs,
348 struct ntvfs_request *req, union smb_lpq *lpq)
349 {
350 return NT_STATUS_NOT_SUPPORTED;
351 }
352
353 /* SMBtrans - not used on file shares */
354 static NTSTATUS pvfs_trans(struct ntvfs_module_context *ntvfs,
355 struct ntvfs_request *req, struct smb_trans2 *trans2)
356 {
357 return NT_STATUS_ACCESS_DENIED;
358 }
359
360 /*
361 initialialise the POSIX disk backend, registering ourselves with the ntvfs subsystem
362 */
363 NTSTATUS ntvfs_posix_init(void)
364 {
365 NTSTATUS ret;
366 struct ntvfs_ops ops;
367 NTVFS_CURRENT_CRITICAL_SIZES(vers);
368
369 ZERO_STRUCT(ops);
370
371 ops.type = NTVFS_DISK;
372
373 /* fill in all the operations */
374 ops.connect_fn = pvfs_connect;
375 ops.disconnect_fn = pvfs_disconnect;
376 ops.unlink_fn = pvfs_unlink;
377 ops.chkpath_fn = pvfs_chkpath;
378 ops.qpathinfo_fn = pvfs_qpathinfo;
379 ops.setpathinfo_fn = pvfs_setpathinfo;
380 ops.open_fn = pvfs_open;
381 ops.mkdir_fn = pvfs_mkdir;
382 ops.rmdir_fn = pvfs_rmdir;
383 ops.rename_fn = pvfs_rename;
384 ops.copy_fn = pvfs_copy;
385 ops.ioctl_fn = pvfs_ioctl;
386 ops.read_fn = pvfs_read;
387 ops.write_fn = pvfs_write;
388 ops.seek_fn = pvfs_seek;
389 ops.flush_fn = pvfs_flush;
390 ops.close_fn = pvfs_close;
391 ops.exit_fn = pvfs_exit;
392 ops.lock_fn = pvfs_lock;
393 ops.setfileinfo_fn = pvfs_setfileinfo;
394 ops.qfileinfo_fn = pvfs_qfileinfo;
395 ops.fsinfo_fn = pvfs_fsinfo;
396 ops.lpq_fn = pvfs_lpq;
397 ops.search_first_fn = pvfs_search_first;
398 ops.search_next_fn = pvfs_search_next;
399 ops.search_close_fn = pvfs_search_close;
400 ops.trans_fn = pvfs_trans;
401 ops.logoff_fn = pvfs_logoff;
402 ops.async_setup_fn = pvfs_async_setup;
403 ops.cancel_fn = pvfs_cancel;
404 ops.notify_fn = pvfs_notify;
405
406 /* register ourselves with the NTVFS subsystem. We register
407 under the name 'default' as we wish to be the default
408 backend, and also register as 'posix' */
409 ops.name = "default";
410 ret = ntvfs_register(&ops, &vers);
411
412 if (!NT_STATUS_IS_OK(ret)) {
413 DEBUG(0,("Failed to register POSIX backend as '%s'!\n", ops.name));
414 }
415
416 ops.name = "posix";
417 ret = ntvfs_register(&ops, &vers);
418
419 if (!NT_STATUS_IS_OK(ret)) {
420 DEBUG(0,("Failed to register POSIX backend as '%s'!\n", ops.name));
421 }
422
423 if (NT_STATUS_IS_OK(ret)) {
424 ret = ntvfs_common_init();
425 }
426
427 return ret;
428 }
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