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