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 2 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, write to the Free Software
20 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
21 */
22 /*
23 this implements most of the POSIX NTVFS backend
24 This is the default backend
25 */
26
27 #include "includes.h"
28 #include "vfs_posix.h"
29 #include "librpc/gen_ndr/security.h"
30 #include "lib/tdb/include/tdb.h"
31 #include "db_wrap.h"
32 #include "libcli/security/security.h"
33 #include "lib/events/events.h"
34
35
36 /*
37 setup config options for a posix share
38 */
pvfs_setup_options(struct pvfs_state * pvfs)39 static void pvfs_setup_options(struct pvfs_state *pvfs)
40 {
41 struct share_config *scfg = pvfs->ntvfs->ctx->config;
42 const char *eadb;
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 }
61
62 /* this must be a power of 2 */
63 pvfs->alloc_size_rounding = share_int_option(scfg,
64 PVFS_ALLOCATION_ROUNDING,
65 PVFS_ALLOCATION_ROUNDING_DEFAULT);
66
67 pvfs->search.inactivity_time = share_int_option(scfg,
68 PVFS_SEARCH_INACTIVITY,
69 PVFS_SEARCH_INACTIVITY_DEFAULT);
70
71 #if HAVE_XATTR_SUPPORT
72 if (share_bool_option(scfg, PVFS_XATTR, PVFS_XATTR_DEFAULT))
73 pvfs->flags |= PVFS_FLAG_XATTR_ENABLE;
74 #endif
75
76 pvfs->sharing_violation_delay = share_int_option(scfg,
77 PVFS_SHARE_DELAY,
78 PVFS_SHARE_DELAY_DEFAULT);
79
80 pvfs->share_name = talloc_strdup(pvfs, scfg->name);
81
82 pvfs->fs_attribs =
83 FS_ATTR_CASE_SENSITIVE_SEARCH |
84 FS_ATTR_CASE_PRESERVED_NAMES |
85 FS_ATTR_UNICODE_ON_DISK |
86 FS_ATTR_SPARSE_FILES;
87
88 /* allow xattrs to be stored in a external tdb */
89 eadb = share_string_option(scfg, PVFS_EADB, NULL);
90 if (eadb != NULL) {
91 pvfs->ea_db = tdb_wrap_open(pvfs, eadb, 50000,
92 TDB_DEFAULT, O_RDWR|O_CREAT, 0600);
93 if (pvfs->ea_db != NULL) {
94 pvfs->flags |= PVFS_FLAG_XATTR_ENABLE;
95 } else {
96 DEBUG(0,("Failed to open eadb '%s' - %s\n",
97 eadb, strerror(errno)));
98 pvfs->flags &= ~PVFS_FLAG_XATTR_ENABLE;
99 }
100 }
101
102 if (pvfs->flags & PVFS_FLAG_XATTR_ENABLE) {
103 pvfs->fs_attribs |= FS_ATTR_NAMED_STREAMS;
104 }
105 if (pvfs->flags & PVFS_FLAG_XATTR_ENABLE) {
106 pvfs->fs_attribs |= FS_ATTR_PERSISTANT_ACLS;
107 }
108
109 pvfs->sid_cache.creator_owner = dom_sid_parse_talloc(pvfs, SID_CREATOR_OWNER);
110 pvfs->sid_cache.creator_group = dom_sid_parse_talloc(pvfs, SID_CREATOR_GROUP);
111
112 /* check if the system really supports xattrs */
113 if (pvfs->flags & PVFS_FLAG_XATTR_ENABLE) {
114 pvfs_xattr_probe(pvfs);
115 }
116
117 /* enable an ACL backend */
118 pvfs->acl_ops = pvfs_acl_backend_byname(share_string_option(scfg, PVFS_ACL, "xattr"));
119 }
120
pvfs_state_destructor(struct pvfs_state * pvfs)121 static int pvfs_state_destructor(struct pvfs_state *pvfs)
122 {
123 struct pvfs_file *f, *fn;
124 struct pvfs_search_state *s, *sn;
125
126 /*
127 * make sure we cleanup files and searches before anything else
128 * because there destructors need to acess the pvfs_state struct
129 */
130 for (f=pvfs->files.list; f; f=fn) {
131 fn = f->next;
132 talloc_free(f);
133 }
134
135 for (s=pvfs->search.list; s; s=sn) {
136 sn = s->next;
137 talloc_free(s);
138 }
139
140 return 0;
141 }
142
143 /*
144 connect to a share - used when a tree_connect operation comes
145 in. For a disk based backend we needs to ensure that the base
146 directory exists (tho it doesn't need to be accessible by the user,
147 that comes later)
148 */
pvfs_connect(struct ntvfs_module_context * ntvfs,struct ntvfs_request * req,const char * sharename)149 static NTSTATUS pvfs_connect(struct ntvfs_module_context *ntvfs,
150 struct ntvfs_request *req, const char *sharename)
151 {
152 struct pvfs_state *pvfs;
153 struct stat st;
154 char *base_directory;
155 NTSTATUS status;
156
157 pvfs = talloc_zero(ntvfs, struct pvfs_state);
158 NT_STATUS_HAVE_NO_MEMORY(pvfs);
159
160 /* for simplicity of path construction, remove any trailing slash now */
161 base_directory = talloc_strdup(pvfs, share_string_option(ntvfs->ctx->config, SHARE_PATH, ""));
162 NT_STATUS_HAVE_NO_MEMORY(base_directory);
163 if (strcmp(base_directory, "/") != 0) {
164 trim_string(base_directory, NULL, "/");
165 }
166
167 pvfs->ntvfs = ntvfs;
168 pvfs->base_directory = base_directory;
169
170 /* the directory must exist. Note that we deliberately don't
171 check that it is readable */
172 if (stat(pvfs->base_directory, &st) != 0 || !S_ISDIR(st.st_mode)) {
173 DEBUG(0,("pvfs_connect: '%s' is not a directory, when connecting to [%s]\n",
174 pvfs->base_directory, sharename));
175 return NT_STATUS_BAD_NETWORK_NAME;
176 }
177
178 ntvfs->ctx->fs_type = talloc_strdup(ntvfs->ctx, "NTFS");
179 NT_STATUS_HAVE_NO_MEMORY(ntvfs->ctx->fs_type);
180
181 ntvfs->ctx->dev_type = talloc_strdup(ntvfs->ctx, "A:");
182 NT_STATUS_HAVE_NO_MEMORY(ntvfs->ctx->dev_type);
183
184 ntvfs->private_data = pvfs;
185
186 pvfs->brl_context = brl_init(pvfs,
187 pvfs->ntvfs->ctx->server_id,
188 pvfs->ntvfs->ctx->msg_ctx);
189 if (pvfs->brl_context == NULL) {
190 return NT_STATUS_INTERNAL_DB_CORRUPTION;
191 }
192
193 pvfs->odb_context = odb_init(pvfs, pvfs->ntvfs->ctx);
194 if (pvfs->odb_context == NULL) {
195 return NT_STATUS_INTERNAL_DB_CORRUPTION;
196 }
197
198 /* allow this to be NULL - we just disable change notify */
199 pvfs->notify_context = notify_init(pvfs,
200 pvfs->ntvfs->ctx->server_id,
201 pvfs->ntvfs->ctx->msg_ctx,
202 event_context_find(pvfs),
203 pvfs->ntvfs->ctx->config);
204
205 pvfs->sidmap = sidmap_open(pvfs);
206 if (pvfs->sidmap == NULL) {
207 return NT_STATUS_INTERNAL_DB_CORRUPTION;
208 }
209
210 /* allocate the search handle -> ptr tree */
211 pvfs->search.idtree = idr_init(pvfs);
212 NT_STATUS_HAVE_NO_MEMORY(pvfs->search.idtree);
213
214 status = pvfs_mangle_init(pvfs);
215 NT_STATUS_NOT_OK_RETURN(status);
216
217 pvfs_setup_options(pvfs);
218
219 talloc_set_destructor(pvfs, pvfs_state_destructor);
220
221 #ifdef SIGXFSZ
222 /* who had the stupid idea to generate a signal on a large
223 file write instead of just failing it!? */
224 BlockSignals(True, SIGXFSZ);
225 #endif
226
227 return NT_STATUS_OK;
228 }
229
230 /*
231 disconnect from a share
232 */
pvfs_disconnect(struct ntvfs_module_context * ntvfs)233 static NTSTATUS pvfs_disconnect(struct ntvfs_module_context *ntvfs)
234 {
235 return NT_STATUS_OK;
236 }
237
238 /*
239 check if a directory exists
240 */
pvfs_chkpath(struct ntvfs_module_context * ntvfs,struct ntvfs_request * req,union smb_chkpath * cp)241 static NTSTATUS pvfs_chkpath(struct ntvfs_module_context *ntvfs,
242 struct ntvfs_request *req,
243 union smb_chkpath *cp)
244 {
245 struct pvfs_state *pvfs = ntvfs->private_data;
246 struct pvfs_filename *name;
247 NTSTATUS status;
248
249 /* resolve the cifs name to a posix name */
250 status = pvfs_resolve_name(pvfs, req, cp->chkpath.in.path, 0, &name);
251 NT_STATUS_NOT_OK_RETURN(status);
252
253 if (!name->exists) {
254 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
255 }
256
257 if (!S_ISDIR(name->st.st_mode)) {
258 return NT_STATUS_NOT_A_DIRECTORY;
259 }
260
261 return NT_STATUS_OK;
262 }
263
264 /*
265 copy a set of files
266 */
pvfs_copy(struct ntvfs_module_context * ntvfs,struct ntvfs_request * req,struct smb_copy * cp)267 static NTSTATUS pvfs_copy(struct ntvfs_module_context *ntvfs,
268 struct ntvfs_request *req, struct smb_copy *cp)
269 {
270 DEBUG(0,("pvfs_copy not implemented\n"));
271 return NT_STATUS_NOT_SUPPORTED;
272 }
273
274 /*
275 return print queue info
276 */
pvfs_lpq(struct ntvfs_module_context * ntvfs,struct ntvfs_request * req,union smb_lpq * lpq)277 static NTSTATUS pvfs_lpq(struct ntvfs_module_context *ntvfs,
278 struct ntvfs_request *req, union smb_lpq *lpq)
279 {
280 return NT_STATUS_NOT_SUPPORTED;
281 }
282
283 /* SMBtrans - not used on file shares */
pvfs_trans(struct ntvfs_module_context * ntvfs,struct ntvfs_request * req,struct smb_trans2 * trans2)284 static NTSTATUS pvfs_trans(struct ntvfs_module_context *ntvfs,
285 struct ntvfs_request *req, struct smb_trans2 *trans2)
286 {
287 return NT_STATUS_ACCESS_DENIED;
288 }
289
290 /*
291 initialialise the POSIX disk backend, registering ourselves with the ntvfs subsystem
292 */
ntvfs_posix_init(void)293 NTSTATUS ntvfs_posix_init(void)
294 {
295 NTSTATUS ret;
296 struct ntvfs_ops ops;
297 NTVFS_CURRENT_CRITICAL_SIZES(vers);
298
299 ZERO_STRUCT(ops);
300
301 ops.type = NTVFS_DISK;
302
303 /* fill in all the operations */
304 ops.connect = pvfs_connect;
305 ops.disconnect = pvfs_disconnect;
306 ops.unlink = pvfs_unlink;
307 ops.chkpath = pvfs_chkpath;
308 ops.qpathinfo = pvfs_qpathinfo;
309 ops.setpathinfo = pvfs_setpathinfo;
310 ops.open = pvfs_open;
311 ops.mkdir = pvfs_mkdir;
312 ops.rmdir = pvfs_rmdir;
313 ops.rename = pvfs_rename;
314 ops.copy = pvfs_copy;
315 ops.ioctl = pvfs_ioctl;
316 ops.read = pvfs_read;
317 ops.write = pvfs_write;
318 ops.seek = pvfs_seek;
319 ops.flush = pvfs_flush;
320 ops.close = pvfs_close;
321 ops.exit = pvfs_exit;
322 ops.lock = pvfs_lock;
323 ops.setfileinfo = pvfs_setfileinfo;
324 ops.qfileinfo = pvfs_qfileinfo;
325 ops.fsinfo = pvfs_fsinfo;
326 ops.lpq = pvfs_lpq;
327 ops.search_first = pvfs_search_first;
328 ops.search_next = pvfs_search_next;
329 ops.search_close = pvfs_search_close;
330 ops.trans = pvfs_trans;
331 ops.logoff = pvfs_logoff;
332 ops.async_setup = pvfs_async_setup;
333 ops.cancel = pvfs_cancel;
334 ops.notify = pvfs_notify;
335
336 /* register ourselves with the NTVFS subsystem. We register
337 under the name 'default' as we wish to be the default
338 backend, and also register as 'posix' */
339 ops.name = "default";
340 ret = ntvfs_register(&ops, &vers);
341
342 if (!NT_STATUS_IS_OK(ret)) {
343 DEBUG(0,("Failed to register POSIX backend as '%s'!\n", ops.name));
344 }
345
346 ops.name = "posix";
347 ret = ntvfs_register(&ops, &vers);
348
349 if (!NT_STATUS_IS_OK(ret)) {
350 DEBUG(0,("Failed to register POSIX backend as '%s'!\n", ops.name));
351 }
352
353 if (NT_STATUS_IS_OK(ret)) {
354 ret = ntvfs_common_init();
355 }
356
357 return ret;
358 }
359