Merge branch 'v4-0-test' of ssh://git.samba.org/data/git/samba into v4-0-test
[kai/samba-autobuild/.git] / source4 / ntvfs / posix / vfs_posix.c
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 "lib/tdb/include/tdb.h"
30 #include "tdb_wrap.h"
31 #include "util/util_ldb.h"
32 #include "libcli/security/security.h"
33 #include "lib/events/events.h"
34 #include "param/param.h"
35
36 /*
37   setup config options for a posix share
38 */
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         if (share_bool_option(scfg, PVFS_AIO, false))
61                 pvfs->flags |= PVFS_FLAG_LINUX_AIO;
62
63         /* file perm options */
64         pvfs->options.create_mask       = share_int_option(scfg,
65                                                            SHARE_CREATE_MASK,
66                                                            SHARE_CREATE_MASK_DEFAULT);
67         pvfs->options.dir_mask          = share_int_option(scfg,
68                                                            SHARE_DIR_MASK,
69                                                            SHARE_DIR_MASK_DEFAULT);
70         pvfs->options.force_dir_mode    = share_int_option(scfg,
71                                                            SHARE_FORCE_DIR_MODE,
72                                                            SHARE_FORCE_DIR_MODE_DEFAULT);
73         pvfs->options.force_create_mode = share_int_option(scfg,
74                                                            SHARE_FORCE_CREATE_MODE,
75                                                            SHARE_FORCE_CREATE_MODE_DEFAULT);
76         /* this must be a power of 2 */
77         pvfs->alloc_size_rounding = share_int_option(scfg,
78                                                         PVFS_ALLOCATION_ROUNDING,
79                                                         PVFS_ALLOCATION_ROUNDING_DEFAULT);
80
81         pvfs->search.inactivity_time = share_int_option(scfg,
82                                                         PVFS_SEARCH_INACTIVITY,
83                                                         PVFS_SEARCH_INACTIVITY_DEFAULT);
84
85 #if HAVE_XATTR_SUPPORT
86         if (share_bool_option(scfg, PVFS_XATTR, PVFS_XATTR_DEFAULT))
87                 pvfs->flags |= PVFS_FLAG_XATTR_ENABLE;
88 #endif
89
90         pvfs->sharing_violation_delay = share_int_option(scfg,
91                                                         PVFS_SHARE_DELAY,
92                                                         PVFS_SHARE_DELAY_DEFAULT);
93
94         pvfs->oplock_break_timeout = share_int_option(scfg,
95                                                       PVFS_OPLOCK_TIMEOUT,
96                                                       PVFS_OPLOCK_TIMEOUT_DEFAULT);
97
98         pvfs->writetime_delay = share_int_option(scfg,
99                                                  PVFS_WRITETIME_DELAY,
100                                                  PVFS_WRITETIME_DELAY_DEFAULT);
101
102         pvfs->share_name = talloc_strdup(pvfs, scfg->name);
103
104         pvfs->fs_attribs = 
105                 FS_ATTR_CASE_SENSITIVE_SEARCH | 
106                 FS_ATTR_CASE_PRESERVED_NAMES |
107                 FS_ATTR_UNICODE_ON_DISK |
108                 FS_ATTR_SPARSE_FILES;
109
110         /* allow xattrs to be stored in a external tdb */
111         eadb = share_string_option(scfg, PVFS_EADB, NULL);
112         if (eadb != NULL) {
113                 pvfs->ea_db = tdb_wrap_open(pvfs, eadb, 50000,  
114                                             TDB_DEFAULT, O_RDWR|O_CREAT, 0600);
115                 if (pvfs->ea_db != NULL) {
116                         pvfs->flags |= PVFS_FLAG_XATTR_ENABLE;
117                 } else {
118                         DEBUG(0,("Failed to open eadb '%s' - %s\n",
119                                  eadb, strerror(errno)));
120                         pvfs->flags &= ~PVFS_FLAG_XATTR_ENABLE;
121                 }
122         }
123
124         if (pvfs->flags & PVFS_FLAG_XATTR_ENABLE) {
125                 pvfs->fs_attribs |= FS_ATTR_NAMED_STREAMS;
126         }
127         if (pvfs->flags & PVFS_FLAG_XATTR_ENABLE) {
128                 pvfs->fs_attribs |= FS_ATTR_PERSISTANT_ACLS;
129         }
130
131         pvfs->sid_cache.creator_owner = dom_sid_parse_talloc(pvfs, SID_CREATOR_OWNER);
132         pvfs->sid_cache.creator_group = dom_sid_parse_talloc(pvfs, SID_CREATOR_GROUP);
133
134         /* check if the system really supports xattrs */
135         if (pvfs->flags & PVFS_FLAG_XATTR_ENABLE) {
136                 pvfs_xattr_probe(pvfs);
137         }
138
139         /* enable an ACL backend */
140         pvfs->acl_ops = pvfs_acl_backend_byname(share_string_option(scfg, PVFS_ACL, "xattr"));
141 }
142
143 static int pvfs_state_destructor(struct pvfs_state *pvfs)
144 {
145         struct pvfs_file *f, *fn;
146         struct pvfs_search_state *s, *sn;
147
148         /* 
149          * make sure we cleanup files and searches before anything else
150          * because there destructors need to acess the pvfs_state struct
151          */
152         for (f=pvfs->files.list; f; f=fn) {
153                 fn = f->next;
154                 talloc_free(f);
155         }
156
157         for (s=pvfs->search.list; s; s=sn) {
158                 sn = s->next;
159                 talloc_free(s);
160         }
161
162         return 0;
163 }
164
165 /*
166   connect to a share - used when a tree_connect operation comes
167   in. For a disk based backend we needs to ensure that the base
168   directory exists (tho it doesn't need to be accessible by the user,
169   that comes later)
170 */
171 static NTSTATUS pvfs_connect(struct ntvfs_module_context *ntvfs,
172                              struct ntvfs_request *req, const char *sharename)
173 {
174         struct pvfs_state *pvfs;
175         struct stat st;
176         char *base_directory;
177         NTSTATUS status;
178
179         pvfs = talloc_zero(ntvfs, struct pvfs_state);
180         NT_STATUS_HAVE_NO_MEMORY(pvfs);
181
182         /* for simplicity of path construction, remove any trailing slash now */
183         base_directory = talloc_strdup(pvfs, share_string_option(ntvfs->ctx->config, SHARE_PATH, ""));
184         NT_STATUS_HAVE_NO_MEMORY(base_directory);
185         if (strcmp(base_directory, "/") != 0) {
186                 trim_string(base_directory, NULL, "/");
187         }
188
189         pvfs->ntvfs = ntvfs;
190         pvfs->base_directory = base_directory;
191
192         /* the directory must exist. Note that we deliberately don't
193            check that it is readable */
194         if (stat(pvfs->base_directory, &st) != 0 || !S_ISDIR(st.st_mode)) {
195                 DEBUG(0,("pvfs_connect: '%s' is not a directory, when connecting to [%s]\n", 
196                          pvfs->base_directory, sharename));
197                 return NT_STATUS_BAD_NETWORK_NAME;
198         }
199
200         ntvfs->ctx->fs_type = talloc_strdup(ntvfs->ctx, "NTFS");
201         NT_STATUS_HAVE_NO_MEMORY(ntvfs->ctx->fs_type);
202
203         ntvfs->ctx->dev_type = talloc_strdup(ntvfs->ctx, "A:");
204         NT_STATUS_HAVE_NO_MEMORY(ntvfs->ctx->dev_type);
205
206         ntvfs->private_data = pvfs;
207
208         pvfs->brl_context = brl_init(pvfs, 
209                                      pvfs->ntvfs->ctx->server_id,
210                                      pvfs->ntvfs->ctx->lp_ctx,
211                                      pvfs->ntvfs->ctx->msg_ctx);
212         if (pvfs->brl_context == NULL) {
213                 return NT_STATUS_INTERNAL_DB_CORRUPTION;
214         }
215
216         pvfs->odb_context = odb_init(pvfs, pvfs->ntvfs->ctx);
217         if (pvfs->odb_context == NULL) {
218                 return NT_STATUS_INTERNAL_DB_CORRUPTION;
219         }
220
221         /* allow this to be NULL - we just disable change notify */
222         pvfs->notify_context = notify_init(pvfs, 
223                                            pvfs->ntvfs->ctx->server_id,  
224                                            pvfs->ntvfs->ctx->msg_ctx, 
225                                            pvfs->ntvfs->ctx->lp_ctx, 
226                                            pvfs->ntvfs->ctx->event_ctx,
227                                            pvfs->ntvfs->ctx->config);
228
229         pvfs->wbc_ctx = wbc_init(pvfs,
230                                  pvfs->ntvfs->ctx->msg_ctx,
231                                  pvfs->ntvfs->ctx->event_ctx);
232         if (pvfs->wbc_ctx == NULL) {
233                 return NT_STATUS_INTERNAL_DB_CORRUPTION;
234         }
235
236         /* allocate the search handle -> ptr tree */
237         pvfs->search.idtree = idr_init(pvfs);
238         NT_STATUS_HAVE_NO_MEMORY(pvfs->search.idtree);
239
240         status = pvfs_mangle_init(pvfs);
241         NT_STATUS_NOT_OK_RETURN(status);
242
243         pvfs_setup_options(pvfs);
244
245         talloc_set_destructor(pvfs, pvfs_state_destructor);
246
247 #ifdef SIGXFSZ
248         /* who had the stupid idea to generate a signal on a large
249            file write instead of just failing it!? */
250         BlockSignals(true, SIGXFSZ);
251 #endif
252
253         return NT_STATUS_OK;
254 }
255
256 /*
257   disconnect from a share
258 */
259 static NTSTATUS pvfs_disconnect(struct ntvfs_module_context *ntvfs)
260 {
261         return NT_STATUS_OK;
262 }
263
264 /*
265   check if a directory exists
266 */
267 static NTSTATUS pvfs_chkpath(struct ntvfs_module_context *ntvfs,
268                              struct ntvfs_request *req,
269                              union smb_chkpath *cp)
270 {
271         struct pvfs_state *pvfs = ntvfs->private_data;
272         struct pvfs_filename *name;
273         NTSTATUS status;
274
275         /* resolve the cifs name to a posix name */
276         status = pvfs_resolve_name(pvfs, req, cp->chkpath.in.path, 0, &name);
277         NT_STATUS_NOT_OK_RETURN(status);
278
279         if (!name->exists) {
280                 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
281         }
282
283         if (!S_ISDIR(name->st.st_mode)) {
284                 return NT_STATUS_NOT_A_DIRECTORY;
285         }
286
287         return NT_STATUS_OK;
288 }
289
290 /*
291   copy a set of files
292 */
293 static NTSTATUS pvfs_copy(struct ntvfs_module_context *ntvfs,
294                           struct ntvfs_request *req, struct smb_copy *cp)
295 {
296         DEBUG(0,("pvfs_copy not implemented\n"));
297         return NT_STATUS_NOT_SUPPORTED;
298 }
299
300 /*
301   return print queue info
302 */
303 static NTSTATUS pvfs_lpq(struct ntvfs_module_context *ntvfs,
304                          struct ntvfs_request *req, union smb_lpq *lpq)
305 {
306         return NT_STATUS_NOT_SUPPORTED;
307 }
308
309 /* SMBtrans - not used on file shares */
310 static NTSTATUS pvfs_trans(struct ntvfs_module_context *ntvfs,
311                            struct ntvfs_request *req, struct smb_trans2 *trans2)
312 {
313         return NT_STATUS_ACCESS_DENIED;
314 }
315
316 /*
317   initialialise the POSIX disk backend, registering ourselves with the ntvfs subsystem
318  */
319 NTSTATUS ntvfs_posix_init(void)
320 {
321         NTSTATUS ret;
322         struct ntvfs_ops ops;
323         NTVFS_CURRENT_CRITICAL_SIZES(vers);
324
325         ZERO_STRUCT(ops);
326
327         ops.type = NTVFS_DISK;
328         
329         /* fill in all the operations */
330         ops.connect = pvfs_connect;
331         ops.disconnect = pvfs_disconnect;
332         ops.unlink = pvfs_unlink;
333         ops.chkpath = pvfs_chkpath;
334         ops.qpathinfo = pvfs_qpathinfo;
335         ops.setpathinfo = pvfs_setpathinfo;
336         ops.open = pvfs_open;
337         ops.mkdir = pvfs_mkdir;
338         ops.rmdir = pvfs_rmdir;
339         ops.rename = pvfs_rename;
340         ops.copy = pvfs_copy;
341         ops.ioctl = pvfs_ioctl;
342         ops.read = pvfs_read;
343         ops.write = pvfs_write;
344         ops.seek = pvfs_seek;
345         ops.flush = pvfs_flush; 
346         ops.close = pvfs_close;
347         ops.exit = pvfs_exit;
348         ops.lock = pvfs_lock;
349         ops.setfileinfo = pvfs_setfileinfo;
350         ops.qfileinfo = pvfs_qfileinfo;
351         ops.fsinfo = pvfs_fsinfo;
352         ops.lpq = pvfs_lpq;
353         ops.search_first = pvfs_search_first;
354         ops.search_next = pvfs_search_next;
355         ops.search_close = pvfs_search_close;
356         ops.trans = pvfs_trans;
357         ops.logoff = pvfs_logoff;
358         ops.async_setup = pvfs_async_setup;
359         ops.cancel = pvfs_cancel;
360         ops.notify = pvfs_notify;
361
362         /* register ourselves with the NTVFS subsystem. We register
363            under the name 'default' as we wish to be the default
364            backend, and also register as 'posix' */
365         ops.name = "default";
366         ret = ntvfs_register(&ops, &vers);
367
368         if (!NT_STATUS_IS_OK(ret)) {
369                 DEBUG(0,("Failed to register POSIX backend as '%s'!\n", ops.name));
370         }
371
372         ops.name = "posix";
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         if (NT_STATUS_IS_OK(ret)) {
380                 ret = ntvfs_common_init();
381         }
382
383         return ret;
384 }