Merge branch 'singlesw' into single
[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 "../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         /*
180          * TODO: call this from ntvfs_posix_init()
181          *       but currently we don't have a lp_ctx there
182          */
183         status = pvfs_acl_init(ntvfs->ctx->lp_ctx);
184         NT_STATUS_NOT_OK_RETURN(status);
185
186         pvfs = talloc_zero(ntvfs, struct pvfs_state);
187         NT_STATUS_HAVE_NO_MEMORY(pvfs);
188
189         /* for simplicity of path construction, remove any trailing slash now */
190         base_directory = talloc_strdup(pvfs, share_string_option(ntvfs->ctx->config, SHARE_PATH, ""));
191         NT_STATUS_HAVE_NO_MEMORY(base_directory);
192         if (strcmp(base_directory, "/") != 0) {
193                 trim_string(base_directory, NULL, "/");
194         }
195
196         pvfs->ntvfs = ntvfs;
197         pvfs->base_directory = base_directory;
198
199         /* the directory must exist. Note that we deliberately don't
200            check that it is readable */
201         if (stat(pvfs->base_directory, &st) != 0 || !S_ISDIR(st.st_mode)) {
202                 DEBUG(0,("pvfs_connect: '%s' is not a directory, when connecting to [%s]\n", 
203                          pvfs->base_directory, sharename));
204                 return NT_STATUS_BAD_NETWORK_NAME;
205         }
206
207         ntvfs->ctx->fs_type = talloc_strdup(ntvfs->ctx, "NTFS");
208         NT_STATUS_HAVE_NO_MEMORY(ntvfs->ctx->fs_type);
209
210         ntvfs->ctx->dev_type = talloc_strdup(ntvfs->ctx, "A:");
211         NT_STATUS_HAVE_NO_MEMORY(ntvfs->ctx->dev_type);
212
213         ntvfs->private_data = pvfs;
214
215         pvfs->brl_context = brl_init(pvfs, 
216                                      pvfs->ntvfs->ctx->server_id,
217                                      pvfs->ntvfs->ctx->lp_ctx,
218                                      pvfs->ntvfs->ctx->msg_ctx);
219         if (pvfs->brl_context == NULL) {
220                 return NT_STATUS_INTERNAL_DB_CORRUPTION;
221         }
222
223         pvfs->odb_context = odb_init(pvfs, pvfs->ntvfs->ctx);
224         if (pvfs->odb_context == NULL) {
225                 return NT_STATUS_INTERNAL_DB_CORRUPTION;
226         }
227
228         /* allow this to be NULL - we just disable change notify */
229         pvfs->notify_context = notify_init(pvfs, 
230                                            pvfs->ntvfs->ctx->server_id,  
231                                            pvfs->ntvfs->ctx->msg_ctx, 
232                                            pvfs->ntvfs->ctx->lp_ctx, 
233                                            pvfs->ntvfs->ctx->event_ctx,
234                                            pvfs->ntvfs->ctx->config);
235
236         pvfs->wbc_ctx = wbc_init(pvfs,
237                                  pvfs->ntvfs->ctx->msg_ctx,
238                                  pvfs->ntvfs->ctx->event_ctx);
239         if (pvfs->wbc_ctx == NULL) {
240                 return NT_STATUS_INTERNAL_DB_CORRUPTION;
241         }
242
243         /* allocate the search handle -> ptr tree */
244         pvfs->search.idtree = idr_init(pvfs);
245         NT_STATUS_HAVE_NO_MEMORY(pvfs->search.idtree);
246
247         status = pvfs_mangle_init(pvfs);
248         NT_STATUS_NOT_OK_RETURN(status);
249
250         pvfs_setup_options(pvfs);
251
252         talloc_set_destructor(pvfs, pvfs_state_destructor);
253
254 #ifdef SIGXFSZ
255         /* who had the stupid idea to generate a signal on a large
256            file write instead of just failing it!? */
257         BlockSignals(true, SIGXFSZ);
258 #endif
259
260         return NT_STATUS_OK;
261 }
262
263 /*
264   disconnect from a share
265 */
266 static NTSTATUS pvfs_disconnect(struct ntvfs_module_context *ntvfs)
267 {
268         return NT_STATUS_OK;
269 }
270
271 /*
272   check if a directory exists
273 */
274 static NTSTATUS pvfs_chkpath(struct ntvfs_module_context *ntvfs,
275                              struct ntvfs_request *req,
276                              union smb_chkpath *cp)
277 {
278         struct pvfs_state *pvfs = ntvfs->private_data;
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,
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,
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,
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)
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 }