source: branches/samba-3.5.x/source4/ntvfs/posix/vfs_posix.c

Last change on this file was 414, checked in by Herwig Bauernfeind, 16 years ago

Samba 3.5.0: Initial import
File size: 11.6 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/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*/
38static void pvfs_setup_options(struct pvfs_state *pvfs)
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
142static int pvfs_state_destructor(struct pvfs_state *pvfs)
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*/
170static NTSTATUS pvfs_connect(struct ntvfs_module_context *ntvfs,
171 struct ntvfs_request *req,
172 union smb_tcon* tcon)
173{
174 struct pvfs_state *pvfs;
175 struct stat st;
176 char *base_directory;
177 NTSTATUS status;
178 const char *sharename;
179
180 switch (tcon->generic.level) {
181 case RAW_TCON_TCON:
182 sharename = tcon->tcon.in.service;
183 break;
184 case RAW_TCON_TCONX:
185 sharename = tcon->tconx.in.path;
186 break;
187 case RAW_TCON_SMB2:
188 sharename = tcon->smb2.in.path;
189 break;
190 default:
191 return NT_STATUS_INVALID_LEVEL;
192 }
193
194 if (strncmp(sharename, "\\\\", 2) == 0) {
195 char *p = strchr(sharename+2, '\\');
196 if (p) {
197 sharename = p + 1;
198 }
199 }
200
201 /*
202 * TODO: call this from ntvfs_posix_init()
203 * but currently we don't have a lp_ctx there
204 */
205 status = pvfs_acl_init(ntvfs->ctx->lp_ctx);
206 NT_STATUS_NOT_OK_RETURN(status);
207
208 pvfs = talloc_zero(ntvfs, struct pvfs_state);
209 NT_STATUS_HAVE_NO_MEMORY(pvfs);
210
211 /* for simplicity of path construction, remove any trailing slash now */
212 base_directory = talloc_strdup(pvfs, share_string_option(ntvfs->ctx->config, SHARE_PATH, ""));
213 NT_STATUS_HAVE_NO_MEMORY(base_directory);
214 if (strcmp(base_directory, "/") != 0) {
215 trim_string(base_directory, NULL, "/");
216 }
217
218 pvfs->ntvfs = ntvfs;
219 pvfs->base_directory = base_directory;
220
221 /* the directory must exist. Note that we deliberately don't
222 check that it is readable */
223 if (stat(pvfs->base_directory, &st) != 0 || !S_ISDIR(st.st_mode)) {
224 DEBUG(0,("pvfs_connect: '%s' is not a directory, when connecting to [%s]\n",
225 pvfs->base_directory, sharename));
226 return NT_STATUS_BAD_NETWORK_NAME;
227 }
228
229 ntvfs->ctx->fs_type = talloc_strdup(ntvfs->ctx, "NTFS");
230 NT_STATUS_HAVE_NO_MEMORY(ntvfs->ctx->fs_type);
231
232 ntvfs->ctx->dev_type = talloc_strdup(ntvfs->ctx, "A:");
233 NT_STATUS_HAVE_NO_MEMORY(ntvfs->ctx->dev_type);
234
235 if (tcon->generic.level == RAW_TCON_TCONX) {
236 tcon->tconx.out.fs_type = ntvfs->ctx->fs_type;
237 tcon->tconx.out.dev_type = ntvfs->ctx->dev_type;
238 }
239
240 ntvfs->private_data = pvfs;
241
242 pvfs->brl_context = brl_init(pvfs,
243 pvfs->ntvfs->ctx->server_id,
244 pvfs->ntvfs->ctx->lp_ctx,
245 pvfs->ntvfs->ctx->msg_ctx);
246 if (pvfs->brl_context == NULL) {
247 return NT_STATUS_INTERNAL_DB_CORRUPTION;
248 }
249
250 pvfs->odb_context = odb_init(pvfs, pvfs->ntvfs->ctx);
251 if (pvfs->odb_context == NULL) {
252 return NT_STATUS_INTERNAL_DB_CORRUPTION;
253 }
254
255 /* allow this to be NULL - we just disable change notify */
256 pvfs->notify_context = notify_init(pvfs,
257 pvfs->ntvfs->ctx->server_id,
258 pvfs->ntvfs->ctx->msg_ctx,
259 pvfs->ntvfs->ctx->lp_ctx,
260 pvfs->ntvfs->ctx->event_ctx,
261 pvfs->ntvfs->ctx->config);
262
263 pvfs->wbc_ctx = wbc_init(pvfs,
264 pvfs->ntvfs->ctx->msg_ctx,
265 pvfs->ntvfs->ctx->event_ctx);
266 if (pvfs->wbc_ctx == NULL) {
267 return NT_STATUS_INTERNAL_DB_CORRUPTION;
268 }
269
270 /* allocate the search handle -> ptr tree */
271 pvfs->search.idtree = idr_init(pvfs);
272 NT_STATUS_HAVE_NO_MEMORY(pvfs->search.idtree);
273
274 status = pvfs_mangle_init(pvfs);
275 NT_STATUS_NOT_OK_RETURN(status);
276
277 pvfs_setup_options(pvfs);
278
279 talloc_set_destructor(pvfs, pvfs_state_destructor);
280
281#ifdef SIGXFSZ
282 /* who had the stupid idea to generate a signal on a large
283 file write instead of just failing it!? */
284 BlockSignals(true, SIGXFSZ);
285#endif
286
287 return NT_STATUS_OK;
288}
289
290/*
291 disconnect from a share
292*/
293static NTSTATUS pvfs_disconnect(struct ntvfs_module_context *ntvfs)
294{
295 return NT_STATUS_OK;
296}
297
298/*
299 check if a directory exists
300*/
301static NTSTATUS pvfs_chkpath(struct ntvfs_module_context *ntvfs,
302 struct ntvfs_request *req,
303 union smb_chkpath *cp)
304{
305 struct pvfs_state *pvfs = talloc_get_type(ntvfs->private_data,
306 struct pvfs_state);
307 struct pvfs_filename *name;
308 NTSTATUS status;
309
310 /* resolve the cifs name to a posix name */
311 status = pvfs_resolve_name(pvfs, req, cp->chkpath.in.path, 0, &name);
312 NT_STATUS_NOT_OK_RETURN(status);
313
314 if (!name->exists) {
315 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
316 }
317
318 if (!S_ISDIR(name->st.st_mode)) {
319 return NT_STATUS_NOT_A_DIRECTORY;
320 }
321
322 return NT_STATUS_OK;
323}
324
325/*
326 copy a set of files
327*/
328static NTSTATUS pvfs_copy(struct ntvfs_module_context *ntvfs,
329 struct ntvfs_request *req, struct smb_copy *cp)
330{
331 DEBUG(0,("pvfs_copy not implemented\n"));
332 return NT_STATUS_NOT_SUPPORTED;
333}
334
335/*
336 return print queue info
337*/
338static NTSTATUS pvfs_lpq(struct ntvfs_module_context *ntvfs,
339 struct ntvfs_request *req, union smb_lpq *lpq)
340{
341 return NT_STATUS_NOT_SUPPORTED;
342}
343
344/* SMBtrans - not used on file shares */
345static NTSTATUS pvfs_trans(struct ntvfs_module_context *ntvfs,
346 struct ntvfs_request *req, struct smb_trans2 *trans2)
347{
348 return NT_STATUS_ACCESS_DENIED;
349}
350
351/*
352 initialialise the POSIX disk backend, registering ourselves with the ntvfs subsystem
353 */
354NTSTATUS ntvfs_posix_init(void)
355{
356 NTSTATUS ret;
357 struct ntvfs_ops ops;
358 NTVFS_CURRENT_CRITICAL_SIZES(vers);
359
360 ZERO_STRUCT(ops);
361
362 ops.type = NTVFS_DISK;
363
364 /* fill in all the operations */
365 ops.connect = pvfs_connect;
366 ops.disconnect = pvfs_disconnect;
367 ops.unlink = pvfs_unlink;
368 ops.chkpath = pvfs_chkpath;
369 ops.qpathinfo = pvfs_qpathinfo;
370 ops.setpathinfo = pvfs_setpathinfo;
371 ops.open = pvfs_open;
372 ops.mkdir = pvfs_mkdir;
373 ops.rmdir = pvfs_rmdir;
374 ops.rename = pvfs_rename;
375 ops.copy = pvfs_copy;
376 ops.ioctl = pvfs_ioctl;
377 ops.read = pvfs_read;
378 ops.write = pvfs_write;
379 ops.seek = pvfs_seek;
380 ops.flush = pvfs_flush;
381 ops.close = pvfs_close;
382 ops.exit = pvfs_exit;
383 ops.lock = pvfs_lock;
384 ops.setfileinfo = pvfs_setfileinfo;
385 ops.qfileinfo = pvfs_qfileinfo;
386 ops.fsinfo = pvfs_fsinfo;
387 ops.lpq = pvfs_lpq;
388 ops.search_first = pvfs_search_first;
389 ops.search_next = pvfs_search_next;
390 ops.search_close = pvfs_search_close;
391 ops.trans = pvfs_trans;
392 ops.logoff = pvfs_logoff;
393 ops.async_setup = pvfs_async_setup;
394 ops.cancel = pvfs_cancel;
395 ops.notify = pvfs_notify;
396
397 /* register ourselves with the NTVFS subsystem. We register
398 under the name 'default' as we wish to be the default
399 backend, and also register as 'posix' */
400 ops.name = "default";
401 ret = ntvfs_register(&ops, &vers);
402
403 if (!NT_STATUS_IS_OK(ret)) {
404 DEBUG(0,("Failed to register POSIX backend as '%s'!\n", ops.name));
405 }
406
407 ops.name = "posix";
408 ret = ntvfs_register(&ops, &vers);
409
410 if (!NT_STATUS_IS_OK(ret)) {
411 DEBUG(0,("Failed to register POSIX backend as '%s'!\n", ops.name));
412 }
413
414 if (NT_STATUS_IS_OK(ret)) {
415 ret = ntvfs_common_init();
416 }
417
418 return ret;
419}
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