1 /*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License (the "License").
6 * You may not use this file except in compliance with the License.
7 *
8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 * or http://www.opensolaris.org/os/licensing.
10 * See the License for the specific language governing permissions
11 * and limitations under the License.
12 *
13 * When distributing Covered Code, include this CDDL HEADER in each
14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 * If applicable, add the following below this CDDL HEADER, with the
16 * fields enclosed by brackets "[]" replaced with your own identifying
17 * information: Portions Copyright [yyyy] [name of copyright owner]
18 *
19 * CDDL HEADER END
20 */
21 /*
22 * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
23 * Copyright 2014 Nexenta Systems, Inc. All rights reserved.
24 */
25
26 #include <sys/types.h>
27 #include <sys/conf.h>
28 #include <sys/ddi.h>
29 #include <sys/modctl.h>
30 #include <sys/cred.h>
31 #include <sys/disp.h>
32 #include <sys/ioccom.h>
33 #include <sys/policy.h>
34 #include <sys/cmn_err.h>
35 #include <smbsrv/smb_kproto.h>
36 #include <smbsrv/smb_ioctl.h>
37
38 #ifdef _FAKE_KERNEL
39 #error "See libfksmbsrv"
40 #endif /* _FAKE_KERNEL */
41
42 static int smb_drv_open(dev_t *, int, int, cred_t *);
43 static int smb_drv_close(dev_t, int, int, cred_t *);
44 static int smb_drv_ioctl(dev_t, int, intptr_t, int, cred_t *, int *);
45 static int smb_drv_attach(dev_info_t *, ddi_attach_cmd_t);
46 static int smb_drv_detach(dev_info_t *, ddi_detach_cmd_t);
47 static int smb_drv_getinfo(dev_info_t *, ddi_info_cmd_t, void *, void **);
48
49 /*
50 * *****************************************************************************
51 * ****************************** Global Variables *****************************
52 * *****************************************************************************
53 *
54 * These variables can only be changed through the /etc/system file.
55 */
56
57 /*
58 * Maximum buffer size for NT: configurable based on the client environment.
59 * IR104720 Experiments with Windows 2000 indicate that we achieve better
60 * SmbWriteX performance with a buffer size of 64KB instead of the 37KB used
61 * with Windows NT4.0. Previous experiments with NT4.0 resulted in directory
62 * listing problems so this buffer size is configurable based on the end-user
63 * environment. When in doubt use 37KB.
64 */
65 int smb_maxbufsize = SMB_NT_MAXBUF;
66 int smb_oplock_levelII = 1;
67 int smb_oplock_timeout = OPLOCK_STD_TIMEOUT;
68 int smb_oplock_min_timeout = OPLOCK_MIN_TIMEOUT;
69 int smb_flush_required = 1;
70 int smb_dirsymlink_enable = 1;
71 int smb_sign_debug = 0;
72 int smb_shortnames = 1;
73 uint_t smb_audit_flags =
74 #ifdef DEBUG
75 SMB_AUDIT_NODE;
76 #else
77 0;
78 #endif
79
80 /*
81 * Maximum number of simultaneous authentication, share mapping, pipe open
82 * requests to be processed.
83 */
84 int smb_ssetup_threshold = SMB_AUTHSVC_MAXTHREAD;
85 int smb_tcon_threshold = 1024;
86 int smb_opipe_threshold = 1024;
87
88 /*
89 * Number of milliseconds that a request will be stalled if it comes in after
90 * the maximum number of inflight operations are being proccessed.
91 */
92 int smb_ssetup_timeout = (30 * 1000);
93 int smb_tcon_timeout = (30 * 1000);
94 int smb_opipe_timeout = (30 * 1000);
95
96 /*
97 * Thread priorities used in smbsrv. Our threads spend most of their time
98 * blocked on various conditions. However, if the system gets heavy load,
99 * the scheduler has to choose an order to run these. We want the order:
100 * (a) timers, (b) notifications, (c) workers, (d) receivers (and etc.)
101 * where notifications are oplock and change notify work. Aside from this
102 * relative ordering, smbsrv threads should run with a priority close to
103 * that of normal user-space threads (thus minclsyspri below), just like
104 * NFS and other "file service" kinds of processing.
105 */
106 int smbsrv_base_pri = MINCLSYSPRI;
107 int smbsrv_listen_pri = MINCLSYSPRI;
108 int smbsrv_receive_pri = MINCLSYSPRI;
109 int smbsrv_worker_pri = MINCLSYSPRI + 1;
110 int smbsrv_notify_pri = MINCLSYSPRI + 2;
111 int smbsrv_timer_pri = MINCLSYSPRI + 5;
112
113
114 /*
115 * *****************************************************************************
116 * ********************** Static Variables / Module Linkage ********************
117 * *****************************************************************************
118 */
119
120 static struct cb_ops cbops = {
121 smb_drv_open, /* cb_open */
122 smb_drv_close, /* cb_close */
123 nodev, /* cb_strategy */
124 nodev, /* cb_print */
125 nodev, /* cb_dump */
126 nodev, /* cb_read */
127 nodev, /* cb_write */
128 smb_drv_ioctl, /* cb_ioctl */
129 nodev, /* cb_devmap */
130 nodev, /* cb_mmap */
131 nodev, /* cb_segmap */
132 nochpoll, /* cb_chpoll */
133 ddi_prop_op, /* cb_prop_op */
134 NULL, /* cb_streamtab */
135 D_MP, /* cb_flag */
136 CB_REV, /* cb_rev */
137 nodev, /* cb_aread */
138 nodev, /* cb_awrite */
139 };
140
141 static struct dev_ops devops = {
142 DEVO_REV, /* devo_rev */
143 0, /* devo_refcnt */
144 smb_drv_getinfo, /* devo_getinfo */
145 nulldev, /* devo_identify */
146 nulldev, /* devo_probe */
147 smb_drv_attach, /* devo_attach */
148 smb_drv_detach, /* devo_detach */
149 nodev, /* devo_reset */
150 &cbops, /* devo_cb_ops */
151 NULL, /* devo_bus_ops */
152 NULL, /* devo_power */
153 ddi_quiesce_not_needed, /* devo_quiesce */
154 };
155
156 static struct modldrv modldrv = {
157 &mod_driverops, /* drv_modops */
158 "CIFS Server Protocol", /* drv_linkinfo */
159 &devops,
160 };
161
162 static struct modlinkage modlinkage = {
163 MODREV_1, /* revision of the module, must be: MODREV_1 */
164 { &modldrv, NULL } /* ptr to linkage structures */
165 };
166
167 static dev_info_t *smb_drv_dip = NULL;
168
169 /*
170 * ****************************************************************************
171 * Module Interface
172 * ****************************************************************************
173 */
174
175 int
176 _init(void)
177 {
178 int rc;
179
180 if ((rc = smb_server_g_init()) != 0) {
181 return (rc);
182 }
183
184 if ((rc = mod_install(&modlinkage)) != 0) {
185 smb_server_g_fini();
186 }
187
188 return (rc);
189 }
190
191 int
192 _info(struct modinfo *modinfop)
193 {
194 return (mod_info(&modlinkage, modinfop));
195 }
196
197 int
198 _fini(void)
199 {
200 int rc;
201
202 if (smb_server_get_count() != 0)
203 return (EBUSY);
204
205 if ((rc = mod_remove(&modlinkage)) == 0) {
206 smb_server_g_fini();
207 }
208
209 return (rc);
210 }
211
212 /*
213 * ****************************************************************************
214 * Pseudo Device Entry Points
215 * ****************************************************************************
216 */
217 /* ARGSUSED */
218 static int
219 smb_drv_open(dev_t *devp, int flag, int otyp, cred_t *cr)
220 {
221 zoneid_t zid;
222
223 /*
224 * Check caller's privileges.
225 */
226 if (secpolicy_smb(cr) != 0)
227 return (EPERM);
228
229 /*
230 * We need a unique minor per zone otherwise an smbd in any other
231 * zone will keep this minor open and we won't get a close call.
232 * The zone ID is good enough as a minor number.
233 */
234 zid = crgetzoneid(cr);
235 if (zid < 0)
236 return (ENODEV);
237 *devp = makedevice(getmajor(*devp), zid);
238
239 /*
240 * Start SMB service state machine
241 */
242 return (smb_server_create());
243 }
244
245 /* ARGSUSED */
246 static int
247 smb_drv_close(dev_t dev, int flag, int otyp, cred_t *credp)
248 {
249 return (smb_server_delete());
250 }
251
252 /* ARGSUSED */
253 static int
254 smb_drv_ioctl(dev_t drv, int cmd, intptr_t argp, int flags, cred_t *cred,
255 int *retval)
256 {
257 smb_ioc_t *ioc;
258 smb_ioc_header_t ioc_hdr;
259 uint32_t crc;
260 boolean_t copyout = B_FALSE;
261 int rc = 0;
262
263 if (ddi_copyin((const void *)argp, &ioc_hdr, sizeof (smb_ioc_header_t),
264 flags) || (ioc_hdr.version != SMB_IOC_VERSION))
265 return (EFAULT);
266
267 crc = ioc_hdr.crc;
268 ioc_hdr.crc = 0;
269 if (smb_crc_gen((uint8_t *)&ioc_hdr, sizeof (ioc_hdr)) != crc)
270 return (EFAULT);
271
272 ioc = kmem_alloc(ioc_hdr.len, KM_SLEEP);
273 if (ddi_copyin((const void *)argp, ioc, ioc_hdr.len, flags)) {
274 kmem_free(ioc, ioc_hdr.len);
275 return (EFAULT);
276 }
277
278 switch (cmd) {
279 case SMB_IOC_CONFIG:
280 rc = smb_server_configure(&ioc->ioc_cfg);
281 break;
282 case SMB_IOC_START:
283 rc = smb_server_start(&ioc->ioc_start);
284 break;
285 case SMB_IOC_STOP:
286 rc = smb_server_stop();
287 break;
288 case SMB_IOC_EVENT:
289 rc = smb_server_notify_event(&ioc->ioc_event);
290 break;
291 case SMB_IOC_GMTOFF:
292 rc = smb_server_set_gmtoff(&ioc->ioc_gmt);
293 break;
294 case SMB_IOC_SHARE:
295 rc = smb_kshare_export_list(&ioc->ioc_share);
296 break;
297 case SMB_IOC_UNSHARE:
298 rc = smb_kshare_unexport_list(&ioc->ioc_share);
299 break;
300 case SMB_IOC_SHAREINFO:
301 rc = smb_kshare_info(&ioc->ioc_shareinfo);
302 copyout = B_TRUE;
303 break;
304 case SMB_IOC_NUMOPEN:
305 rc = smb_server_numopen(&ioc->ioc_opennum);
306 copyout = B_TRUE;
307 break;
308 case SMB_IOC_SVCENUM:
309 rc = smb_server_enum(&ioc->ioc_svcenum);
310 copyout = B_TRUE;
311 break;
312 case SMB_IOC_SESSION_CLOSE:
313 rc = smb_server_session_close(&ioc->ioc_session);
314 break;
315 case SMB_IOC_FILE_CLOSE:
316 rc = smb_server_file_close(&ioc->ioc_fileid);
317 break;
318 case SMB_IOC_SPOOLDOC:
319 rc = smb_server_spooldoc(&ioc->ioc_spooldoc);
320 copyout = B_TRUE;
321 break;
322 default:
323 rc = ENOTTY;
324 break;
325 }
326 if ((rc == 0) && copyout) {
327 if (ddi_copyout((const void *)ioc, (void *)argp, ioc_hdr.len,
328 flags))
329 rc = EFAULT;
330 }
331 kmem_free(ioc, ioc_hdr.len);
332 return (rc);
333 }
334
335 /*
336 * ****************************************************************************
337 * Pseudo Device Operations
338 * ****************************************************************************
339 */
340 static int
341 smb_drv_attach(dev_info_t *dip, ddi_attach_cmd_t cmd)
342 {
343 if (cmd == DDI_ATTACH) {
344 /* we only allow instance 0 to attach */
345 if (ddi_get_instance(dip) == 0) {
346 /* create the minor node */
347 if (ddi_create_minor_node(dip, "smbsrv", S_IFCHR, 0,
348 DDI_PSEUDO, 0) == DDI_SUCCESS) {
349 smb_drv_dip = dip;
350 return (DDI_SUCCESS);
351 } else {
352 cmn_err(CE_WARN, "smb_drv_attach:"
353 " failed creating minor node");
354 }
355 }
356 }
357 return (DDI_FAILURE);
358 }
359
360 static int
361 smb_drv_detach(dev_info_t *dip, ddi_detach_cmd_t cmd)
362 {
363 if (cmd == DDI_DETACH) {
364 ASSERT(dip == smb_drv_dip);
365 ddi_remove_minor_node(dip, NULL);
366 smb_drv_dip = NULL;
367 return (DDI_SUCCESS);
368 }
369 return (DDI_FAILURE);
370 }
371
372 /* ARGSUSED */
373 static int
374 smb_drv_getinfo(dev_info_t *dip, ddi_info_cmd_t cmd, void *arg, void **result)
375 {
376 ulong_t instance = getminor((dev_t)arg);
377
378 switch (cmd) {
379 case DDI_INFO_DEVT2DEVINFO:
380 *result = smb_drv_dip;
381 return (DDI_SUCCESS);
382
383 case DDI_INFO_DEVT2INSTANCE:
384 *result = (void *)instance;
385 return (DDI_SUCCESS);
386
387 default:
388 break;
389 }
390
391 return (DDI_FAILURE);
392 }