1/*
2 * Copyright (c) 2000-2001 Boris Popov
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. All advertising materials mentioning features or use of this software
14 * must display the following acknowledgement:
15 * This product includes software developed by Boris Popov.
16 * 4. Neither the name of the author nor the names of any co-contributors
17 * may be used to endorse or promote products derived from this software
18 * without specific prior written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30 * SUCH DAMAGE.
31 */
32
33#include <sys/cdefs.h>
34__FBSDID("$FreeBSD: head/sys/netsmb/smb_dev.c 130640 2004-06-17 17:16:53Z phk $");
35
36#include <sys/param.h>
37#include <sys/kernel.h>
38#include <sys/module.h>
39#include <sys/systm.h>
40#include <sys/conf.h>
41#include <sys/fcntl.h>
42#include <sys/ioccom.h>
43#include <sys/lock.h>
44#include <sys/malloc.h>
45#include <sys/file.h> /* Must come after sys/malloc.h */
46#include <sys/filedesc.h>
47#include <sys/mbuf.h>
48#include <sys/poll.h>
49#include <sys/proc.h>
50#include <sys/select.h>
51#include <sys/socket.h>
52#include <sys/socketvar.h>
53#include <sys/sysctl.h>
54#include <sys/uio.h>
55#include <sys/vnode.h>
56
57#include <net/if.h>
58
59#include <netsmb/smb.h>
60#include <netsmb/smb_conn.h>
61#include <netsmb/smb_subr.h>
62#include <netsmb/smb_dev.h>
63
64#define SMB_GETDEV(dev) ((struct smb_dev*)(dev)->si_drv1)
65#define SMB_CHECKMINOR(dev) do { \
66 sdp = SMB_GETDEV(dev); \
67 if (sdp == NULL) return ENXIO; \
68 } while(0)
69
70static d_open_t nsmb_dev_open;
71static d_close_t nsmb_dev_close;
72static d_ioctl_t nsmb_dev_ioctl;
73
74MODULE_DEPEND(netsmb, libiconv, 1, 1, 2);
75MODULE_VERSION(netsmb, NSMB_VERSION);
76
77static int smb_version = NSMB_VERSION;
78
79
80SYSCTL_DECL(_net_smb);
81SYSCTL_INT(_net_smb, OID_AUTO, version, CTLFLAG_RD, &smb_version, 0, "");
82
83static MALLOC_DEFINE(M_NSMBDEV, "NETSMBDEV", "NET/SMB device");
84
85
86/*
87int smb_dev_queue(struct smb_dev *ndp, struct smb_rq *rqp, int prio);
88*/
89
90static struct cdevsw nsmb_cdevsw = {
91 .d_version = D_VERSION,
92 .d_flags = D_NEEDGIANT,
93 .d_open = nsmb_dev_open,
94 .d_close = nsmb_dev_close,
95 .d_ioctl = nsmb_dev_ioctl,
96 .d_name = NSMB_NAME
97};
98
99static eventhandler_tag nsmb_dev_tag;
100
101static void
102nsmb_dev_clone(void *arg, char *name, int namelen, struct cdev **dev)
103{
104 int u;
105
106 if (*dev != NULL)
107 return;
108 if (dev_stdclone(name, NULL, NSMB_NAME, &u) != 1)
109 return;
110 *dev = make_dev(&nsmb_cdevsw, unit2minor(u), 0, 0, 0600,
111 NSMB_NAME"%d", u);
112}
113
114static int
115nsmb_dev_open(struct cdev *dev, int oflags, int devtype, struct thread *td)
116{
117 struct smb_dev *sdp;
118 struct ucred *cred = td->td_ucred;
119 int s;
120
121 sdp = SMB_GETDEV(dev);
122 if (sdp && (sdp->sd_flags & NSMBFL_OPEN))
123 return EBUSY;
124 if (sdp == NULL) {
125 sdp = malloc(sizeof(*sdp), M_NSMBDEV, M_WAITOK);
126 dev->si_drv1 = (void*)sdp;
127 }
128 /*
129 * XXX: this is just crazy - make a device for an already passed device...
130 * someone should take care of it.
131 */
132 if ((dev->si_flags & SI_NAMED) == 0)
133 make_dev(&nsmb_cdevsw, minor(dev), cred->cr_uid, cred->cr_gid, 0700,
134 NSMB_NAME"%d", dev2unit(dev));
135 bzero(sdp, sizeof(*sdp));
136/*
137 STAILQ_INIT(&sdp->sd_rqlist);
138 STAILQ_INIT(&sdp->sd_rplist);
139 bzero(&sdp->sd_pollinfo, sizeof(struct selinfo));
140*/
141 s = splimp();
142 sdp->sd_level = -1;
143 sdp->sd_flags |= NSMBFL_OPEN;
144 splx(s);
145 return 0;
146}
147
148static int
149nsmb_dev_close(struct cdev *dev, int flag, int fmt, struct thread *td)
150{
151 struct smb_dev *sdp;
152 struct smb_vc *vcp;
153 struct smb_share *ssp;
154 struct smb_cred scred;
155 int s;
156
157 SMB_CHECKMINOR(dev);
158 s = splimp();
159 if ((sdp->sd_flags & NSMBFL_OPEN) == 0) {
160 splx(s);
161 return EBADF;
162 }
163 smb_makescred(&scred, td, NULL);
164 ssp = sdp->sd_share;
165 if (ssp != NULL)
166 smb_share_rele(ssp, &scred);
167 vcp = sdp->sd_vc;
168 if (vcp != NULL)
169 smb_vc_rele(vcp, &scred);
170/*
171 smb_flushq(&sdp->sd_rqlist);
172 smb_flushq(&sdp->sd_rplist);
173*/
174 dev->si_drv1 = NULL;
175 free(sdp, M_NSMBDEV);
176 destroy_dev(dev);
177 splx(s);
178 return 0;
179}
180
181
182static int
183nsmb_dev_ioctl(struct cdev *dev, u_long cmd, caddr_t data, int flag, struct thread *td)
184{
185 struct smb_dev *sdp;
186 struct smb_vc *vcp;
187 struct smb_share *ssp;
188 struct smb_cred scred;
189 int error = 0;
190
191 SMB_CHECKMINOR(dev);
192 if ((sdp->sd_flags & NSMBFL_OPEN) == 0)
193 return EBADF;
194
195 smb_makescred(&scred, td, NULL);
196 switch (cmd) {
197 case SMBIOC_OPENSESSION:
198 if (sdp->sd_vc)
199 return EISCONN;
200 error = smb_usr_opensession((struct smbioc_ossn*)data,
201 &scred, &vcp);
202 if (error)
203 break;
204 sdp->sd_vc = vcp;
205 smb_vc_unlock(vcp, 0, td);
206 sdp->sd_level = SMBL_VC;
207 break;
208 case SMBIOC_OPENSHARE:
209 if (sdp->sd_share)
210 return EISCONN;
211 if (sdp->sd_vc == NULL)
212 return ENOTCONN;
213 error = smb_usr_openshare(sdp->sd_vc,
214 (struct smbioc_oshare*)data, &scred, &ssp);
215 if (error)
216 break;
217 sdp->sd_share = ssp;
218 smb_share_unlock(ssp, 0, td);
219 sdp->sd_level = SMBL_SHARE;
220 break;
221 case SMBIOC_REQUEST:
222 if (sdp->sd_share == NULL)
223 return ENOTCONN;
224 error = smb_usr_simplerequest(sdp->sd_share,
225 (struct smbioc_rq*)data, &scred);
226 break;
227 case SMBIOC_T2RQ:
228 if (sdp->sd_share == NULL)
229 return ENOTCONN;
230 error = smb_usr_t2request(sdp->sd_share,
231 (struct smbioc_t2rq*)data, &scred);
232 break;
233 case SMBIOC_SETFLAGS: {
234 struct smbioc_flags *fl = (struct smbioc_flags*)data;
235 int on;
236
237 if (fl->ioc_level == SMBL_VC) {
238 if (fl->ioc_mask & SMBV_PERMANENT) {
239 on = fl->ioc_flags & SMBV_PERMANENT;
240 if ((vcp = sdp->sd_vc) == NULL)
241 return ENOTCONN;
242 error = smb_vc_get(vcp, LK_EXCLUSIVE, &scred);
243 if (error)
244 break;
245 if (on && (vcp->obj.co_flags & SMBV_PERMANENT) == 0) {
246 vcp->obj.co_flags |= SMBV_PERMANENT;
247 smb_vc_ref(vcp);
248 } else if (!on && (vcp->obj.co_flags & SMBV_PERMANENT)) {
249 vcp->obj.co_flags &= ~SMBV_PERMANENT;
250 smb_vc_rele(vcp, &scred);
251 }
252 smb_vc_put(vcp, &scred);
253 } else
254 error = EINVAL;
255 } else if (fl->ioc_level == SMBL_SHARE) {
256 if (fl->ioc_mask & SMBS_PERMANENT) {
257 on = fl->ioc_flags & SMBS_PERMANENT;
258 if ((ssp = sdp->sd_share) == NULL)
259 return ENOTCONN;
260 error = smb_share_get(ssp, LK_EXCLUSIVE, &scred);
261 if (error)
262 break;
263 if (on && (ssp->obj.co_flags & SMBS_PERMANENT) == 0) {
264 ssp->obj.co_flags |= SMBS_PERMANENT;
265 smb_share_ref(ssp);
266 } else if (!on && (ssp->obj.co_flags & SMBS_PERMANENT)) {
267 ssp->obj.co_flags &= ~SMBS_PERMANENT;
268 smb_share_rele(ssp, &scred);
269 }
270 smb_share_put(ssp, &scred);
271 } else
272 error = EINVAL;
273 break;
274 } else
275 error = EINVAL;
276 break;
277 }
278 case SMBIOC_LOOKUP:
279 if (sdp->sd_vc || sdp->sd_share)
280 return EISCONN;
281 vcp = NULL;
282 ssp = NULL;
283 error = smb_usr_lookup((struct smbioc_lookup*)data, &scred, &vcp, &ssp);
284 if (error)
285 break;
286 if (vcp) {
287 sdp->sd_vc = vcp;
288 smb_vc_unlock(vcp, 0, td);
289 sdp->sd_level = SMBL_VC;
290 }
291 if (ssp) {
292 sdp->sd_share = ssp;
293 smb_share_unlock(ssp, 0, td);
294 sdp->sd_level = SMBL_SHARE;
295 }
296 break;
297 case SMBIOC_READ: case SMBIOC_WRITE: {
298 struct smbioc_rw *rwrq = (struct smbioc_rw*)data;
299 struct uio auio;
300 struct iovec iov;
301
302 if ((ssp = sdp->sd_share) == NULL)
303 return ENOTCONN;
304 iov.iov_base = rwrq->ioc_base;
305 iov.iov_len = rwrq->ioc_cnt;
306 auio.uio_iov = &iov;
307 auio.uio_iovcnt = 1;
308 auio.uio_offset = rwrq->ioc_offset;
309 auio.uio_resid = rwrq->ioc_cnt;
310 auio.uio_segflg = UIO_USERSPACE;
311 auio.uio_rw = (cmd == SMBIOC_READ) ? UIO_READ : UIO_WRITE;
312 auio.uio_td = td;
313 if (cmd == SMBIOC_READ)
314 error = smb_read(ssp, rwrq->ioc_fh, &auio, &scred);
315 else
316 error = smb_write(ssp, rwrq->ioc_fh, &auio, &scred);
317 rwrq->ioc_cnt -= auio.uio_resid;
318 break;
319 }
320 default:
321 error = ENODEV;
322 }
323 return error;
324}
325
326static int
327nsmb_dev_load(module_t mod, int cmd, void *arg)
328{
329 int error = 0;
330
331 switch (cmd) {
332 case MOD_LOAD:
333 error = smb_sm_init();
334 if (error)
335 break;
336 error = smb_iod_init();
337 if (error) {
338 smb_sm_done();
339 break;
340 }
341 nsmb_dev_tag = EVENTHANDLER_REGISTER(dev_clone, nsmb_dev_clone, 0, 1000);
342 printf("netsmb_dev: loaded\n");
343 break;
344 case MOD_UNLOAD:
345 smb_iod_done();
346 error = smb_sm_done();
347 error = 0;
348 EVENTHANDLER_DEREGISTER(dev_clone, nsmb_dev_tag);
349 printf("netsmb_dev: unloaded\n");
350 break;
351 default:
352 error = EINVAL;
353 break;
354 }
355 return error;
356}
357
358DEV_MODULE (dev_netsmb, nsmb_dev_load, 0);
359
360/*
361 * Convert a file descriptor to appropriate smb_share pointer
362 */
363static struct file*
364nsmb_getfp(struct filedesc* fdp, int fd, int flag)
365{
366 struct file* fp;
367
368 FILEDESC_LOCK(fdp);
369 if (((u_int)fd) >= fdp->fd_nfiles ||
370 (fp = fdp->fd_ofiles[fd]) == NULL ||
371 (fp->f_flag & flag) == 0) {
372 FILEDESC_UNLOCK(fdp);
373 return (NULL);
374 }
375 fhold(fp);
376 FILEDESC_UNLOCK(fdp);
377 return (fp);
378}
379
380int
381smb_dev2share(int fd, int mode, struct smb_cred *scred,
382 struct smb_share **sspp)
383{
384 struct file *fp;
385 struct vnode *vp;
386 struct smb_dev *sdp;
387 struct smb_share *ssp;
388 struct cdev *dev;
389 int error;
390
391 fp = nsmb_getfp(scred->scr_td->td_proc->p_fd, fd, FREAD | FWRITE);
392 if (fp == NULL)
393 return EBADF;
394 vp = fp->f_vnode;
395 if (vp == NULL) {
396 fdrop(fp, curthread);
397 return EBADF;
398 }
399 dev = vn_todev(vp);
400 if (dev == NULL) {
401 fdrop(fp, curthread);
402 return EBADF;
403 }
404 SMB_CHECKMINOR(dev);
405 ssp = sdp->sd_share;
406 if (ssp == NULL) {
407 fdrop(fp, curthread);
408 return ENOTCONN;
409 }
410 error = smb_share_get(ssp, LK_EXCLUSIVE, scred);
411 if (error == 0)
412 *sspp = ssp;
413 fdrop(fp, curthread);
414 return error;
415}
416