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 * $FreeBSD: head/sys/netsmb/smb_dev.c 82042 2001-08-21 08:58:02Z bp $
33 */
34#include <sys/param.h>
35#include <sys/kernel.h>
36#include <sys/systm.h>
37#include <sys/conf.h>
38#include <sys/fcntl.h>
39#include <sys/ioccom.h>
40#include <sys/lock.h>
41#include <sys/malloc.h>
42#include <sys/file.h> /* Must come after sys/malloc.h */
43#include <sys/mbuf.h>
44#include <sys/poll.h>
45#include <sys/proc.h>
46#include <sys/select.h>
47#include <sys/socket.h>
48#include <sys/socketvar.h>
49#include <sys/sysctl.h>
50#include <sys/uio.h>
51#include <sys/vnode.h>
52
53#include <net/if.h>
54
55#include <netsmb/smb.h>
56#include <netsmb/smb_conn.h>
57#include <netsmb/smb_subr.h>
58#include <netsmb/smb_dev.h>
59
60#define SMB_GETDEV(dev) ((struct smb_dev*)(dev)->si_drv1)
61#define SMB_CHECKMINOR(dev) do { \
62 sdp = SMB_GETDEV(dev); \
63 if (sdp == NULL) return ENXIO; \
64 } while(0)
65
66static d_open_t nsmb_dev_open;
67static d_close_t nsmb_dev_close;
68static d_read_t nsmb_dev_read;
69static d_write_t nsmb_dev_write;
70static d_ioctl_t nsmb_dev_ioctl;
71static d_poll_t nsmb_dev_poll;
72
73MODULE_DEPEND(netsmb, libiconv, 1, 1, 1);
74MODULE_VERSION(netsmb, NSMB_VERSION);
75
76static int smb_version = NSMB_VERSION;
77
78
79SYSCTL_DECL(_net_smb);
80SYSCTL_INT(_net_smb, OID_AUTO, version, CTLFLAG_RD, &smb_version, 0, "");
81
82static MALLOC_DEFINE(M_NSMBDEV, "NETSMBDEV", "NET/SMB device");
83
84
85/*
86int smb_dev_queue(struct smb_dev *ndp, struct smb_rq *rqp, int prio);
87*/
88
89static struct cdevsw nsmb_cdevsw = {
90 /* open */ nsmb_dev_open,
91 /* close */ nsmb_dev_close,
92 /* read */ nsmb_dev_read,
93 /* write */ nsmb_dev_write,
94 /* ioctl */ nsmb_dev_ioctl,
95 /* poll */ nsmb_dev_poll,
96 /* mmap */ nommap,
97 /* strategy */ nostrategy,
98 /* name */ NSMB_NAME,
99 /* maj */ NSMB_MAJOR,
100 /* dump */ nodump,
101 /* psize */ nopsize,
102 /* flags */ 0,
103#ifndef FB_CURRENT
104 /* bmaj */ -1
105#endif
106};
107
108static eventhandler_tag nsmb_dev_tag;
109
110static void
111nsmb_dev_clone(void *arg, char *name, int namelen, dev_t *dev)
112{
113 int min;
114
115 if (*dev != NODEV)
116 return;
117 if (dev_stdclone(name, NULL, NSMB_NAME, &min) != 1)
118 return;
119 *dev = make_dev(&nsmb_cdevsw, min, 0, 0, 0600, NSMB_NAME"%d", min);
120}
121
122static int
123nsmb_dev_open(dev_t dev, int oflags, int devtype, struct proc *p)
124{
125 struct smb_dev *sdp;
126 struct ucred *cred = p->p_ucred;
127 int s;
128
129 sdp = SMB_GETDEV(dev);
130 if (sdp && (sdp->sd_flags & NSMBFL_OPEN))
131 return EBUSY;
132 if (sdp == NULL) {
133 sdp = malloc(sizeof(*sdp), M_NSMBDEV, M_WAITOK);
134 dev->si_drv1 = (void*)sdp;
135 }
136 /*
137 * XXX: this is just crazy - make a device for an already passed device...
138 * someone should take care of it.
139 */
140 if ((dev->si_flags & SI_NAMED) == 0)
141 make_dev(&nsmb_cdevsw, minor(dev), cred->cr_uid, cred->cr_gid, 0700,
142 NSMB_NAME"%d", dev2unit(dev));
143 bzero(sdp, sizeof(*sdp));
144/*
145 STAILQ_INIT(&sdp->sd_rqlist);
146 STAILQ_INIT(&sdp->sd_rplist);
147 bzero(&sdp->sd_pollinfo, sizeof(struct selinfo));
148*/
149 s = splimp();
150 sdp->sd_level = -1;
151 sdp->sd_flags |= NSMBFL_OPEN;
152 splx(s);
153 return 0;
154}
155
156static int
157nsmb_dev_close(dev_t dev, int flag, int fmt, struct proc *p)
158{
159 struct smb_dev *sdp;
160 struct smb_vc *vcp;
161 struct smb_share *ssp;
162 struct smb_cred scred;
163 int s;
164
165 SMB_CHECKMINOR(dev);
166 s = splimp();
167 if ((sdp->sd_flags & NSMBFL_OPEN) == 0) {
168 splx(s);
169 return EBADF;
170 }
171 smb_makescred(&scred, p, NULL);
172 ssp = sdp->sd_share;
173 if (ssp != NULL)
174 smb_share_rele(ssp, &scred);
175 vcp = sdp->sd_vc;
176 if (vcp != NULL)
177 smb_vc_rele(vcp, &scred);
178/*
179 smb_flushq(&sdp->sd_rqlist);
180 smb_flushq(&sdp->sd_rplist);
181*/
182 dev->si_drv1 = NULL;
183 free(sdp, M_NSMBDEV);
184 destroy_dev(dev);
185 splx(s);
186 return 0;
187}
188
189
190static int
191nsmb_dev_ioctl(dev_t dev, u_long cmd, caddr_t data, int flag, struct proc *p)
192{
193 struct smb_dev *sdp;
194 struct smb_vc *vcp;
195 struct smb_share *ssp;
196 struct smb_cred scred;
197 int error = 0;
198
199 SMB_CHECKMINOR(dev);
200 if ((sdp->sd_flags & NSMBFL_OPEN) == 0)
201 return EBADF;
202
203 smb_makescred(&scred, p, NULL);
204 switch (cmd) {
205 case SMBIOC_OPENSESSION:
206 if (sdp->sd_vc)
207 return EISCONN;
208 error = smb_usr_opensession((struct smbioc_ossn*)data,
209 &scred, &vcp);
210 if (error)
211 break;
212 sdp->sd_vc = vcp;
213 smb_vc_unlock(vcp, 0, p);
214 sdp->sd_level = SMBL_VC;
215 break;
216 case SMBIOC_OPENSHARE:
217 if (sdp->sd_share)
218 return EISCONN;
219 if (sdp->sd_vc == NULL)
220 return ENOTCONN;
221 error = smb_usr_openshare(sdp->sd_vc,
222 (struct smbioc_oshare*)data, &scred, &ssp);
223 if (error)
224 break;
225 sdp->sd_share = ssp;
226 smb_share_unlock(ssp, 0, p);
227 sdp->sd_level = SMBL_SHARE;
228 break;
229 case SMBIOC_REQUEST:
230 if (sdp->sd_share == NULL)
231 return ENOTCONN;
232 error = smb_usr_simplerequest(sdp->sd_share,
233 (struct smbioc_rq*)data, &scred);
234 break;
235 case SMBIOC_T2RQ:
236 if (sdp->sd_share == NULL)
237 return ENOTCONN;
238 error = smb_usr_t2request(sdp->sd_share,
239 (struct smbioc_t2rq*)data, &scred);
240 break;
241 case SMBIOC_SETFLAGS: {
242 struct smbioc_flags *fl = (struct smbioc_flags*)data;
243 int on;
244
245 if (fl->ioc_level == SMBL_VC) {
246 if (fl->ioc_mask & SMBV_PERMANENT) {
247 on = fl->ioc_flags & SMBV_PERMANENT;
248 if ((vcp = sdp->sd_vc) == NULL)
249 return ENOTCONN;
250 error = smb_vc_get(vcp, LK_EXCLUSIVE, &scred);
251 if (error)
252 break;
253 if (on && (vcp->obj.co_flags & SMBV_PERMANENT) == 0) {
254 vcp->obj.co_flags |= SMBV_PERMANENT;
255 smb_vc_ref(vcp, p);
256 } else if (!on && (vcp->obj.co_flags & SMBV_PERMANENT)) {
257 vcp->obj.co_flags &= ~SMBV_PERMANENT;
258 smb_vc_rele(vcp, &scred);
259 }
260 smb_vc_put(vcp, &scred);
261 } else
262 error = EINVAL;
263 } else if (fl->ioc_level == SMBL_SHARE) {
264 if (fl->ioc_mask & SMBS_PERMANENT) {
265 on = fl->ioc_flags & SMBS_PERMANENT;
266 if ((ssp = sdp->sd_share) == NULL)
267 return ENOTCONN;
268 error = smb_share_get(ssp, LK_EXCLUSIVE, &scred);
269 if (error)
270 break;
271 if (on && (ssp->obj.co_flags & SMBS_PERMANENT) == 0) {
272 ssp->obj.co_flags |= SMBS_PERMANENT;
273 smb_share_ref(ssp, p);
274 } else if (!on && (ssp->obj.co_flags & SMBS_PERMANENT)) {
275 ssp->obj.co_flags &= ~SMBS_PERMANENT;
276 smb_share_rele(ssp, &scred);
277 }
278 smb_share_put(ssp, &scred);
279 } else
280 error = EINVAL;
281 break;
282 } else
283 error = EINVAL;
284 break;
285 }
286 case SMBIOC_LOOKUP:
287 if (sdp->sd_vc || sdp->sd_share)
288 return EISCONN;
289 vcp = NULL;
290 ssp = NULL;
291 error = smb_usr_lookup((struct smbioc_lookup*)data, &scred, &vcp, &ssp);
292 if (error)
293 break;
294 if (vcp) {
295 sdp->sd_vc = vcp;
296 smb_vc_unlock(vcp, 0, p);
297 sdp->sd_level = SMBL_VC;
298 }
299 if (ssp) {
300 sdp->sd_share = ssp;
301 smb_share_unlock(ssp, 0, p);
302 sdp->sd_level = SMBL_SHARE;
303 }
304 break;
305 case SMBIOC_READ: case SMBIOC_WRITE: {
306 struct smbioc_rw *rwrq = (struct smbioc_rw*)data;
307 struct uio auio;
308 struct iovec iov;
309
310 if ((ssp = sdp->sd_share) == NULL)
311 return ENOTCONN;
312 iov.iov_base = rwrq->ioc_base;
313 iov.iov_len = rwrq->ioc_cnt;
314 auio.uio_iov = &iov;
315 auio.uio_iovcnt = 1;
316 auio.uio_offset = rwrq->ioc_offset;
317 auio.uio_resid = rwrq->ioc_cnt;
318 auio.uio_segflg = UIO_USERSPACE;
319 auio.uio_rw = (cmd == SMBIOC_READ) ? UIO_READ : UIO_WRITE;
320 auio.uio_procp = p;
321 if (cmd == SMBIOC_READ)
322 error = smb_read(ssp, rwrq->ioc_fh, &auio, &scred);
323 else
324 error = smb_write(ssp, rwrq->ioc_fh, &auio, &scred);
325 rwrq->ioc_cnt -= auio.uio_resid;
326 break;
327 }
328 default:
329 error = ENODEV;
330 }
331 return error;
332}
333
334static int
335nsmb_dev_read(dev_t dev, struct uio *uio, int flag)
336{
337 return EACCES;
338}
339
340static int
341nsmb_dev_write(dev_t dev, struct uio *uio, int flag)
342{
343 return EACCES;
344}
345
346static int
347nsmb_dev_poll(dev_t dev, int events, struct proc *p)
348{
349 return ENODEV;
350}
351
352static int
353nsmb_dev_load(module_t mod, int cmd, void *arg)
354{
355 int error = 0;
356
357 switch (cmd) {
358 case MOD_LOAD:
359 error = smb_sm_init();
360 if (error)
361 break;
362 error = smb_iod_init();
363 if (error) {
364 smb_sm_done();
365 break;
366 }
367 cdevsw_add(&nsmb_cdevsw);
368 nsmb_dev_tag = EVENTHANDLER_REGISTER(dev_clone, nsmb_dev_clone, 0, 1000);
369 printf("netsmb_dev: loaded\n");
370 break;
371 case MOD_UNLOAD:
372 smb_iod_done();
373 error = smb_sm_done();
374 error = 0;
375 EVENTHANDLER_DEREGISTER(dev_clone, nsmb_dev_tag);
376 cdevsw_remove(&nsmb_cdevsw);
377 printf("netsmb_dev: unloaded\n");
378 break;
379 default:
380 error = EINVAL;
381 break;
382 }
383 return error;
384}
385
386DEV_MODULE (dev_netsmb, nsmb_dev_load, 0);
387
388/*
389 * Convert a file descriptor to appropriate smb_share pointer
390 */
391static struct file*
392nsmb_getfp(struct filedesc* fdp, int fd, int flag)
393{
394 struct file* fp;
395
396 if (((u_int)fd) >= fdp->fd_nfiles ||
397 (fp = fdp->fd_ofiles[fd]) == NULL ||
398 (fp->f_flag & flag) == 0)
399 return (NULL);
400 return (fp);
401}
402
403int
404smb_dev2share(int fd, int mode, struct smb_cred *scred,
405 struct smb_share **sspp)
406{
407 struct file *fp;
408 struct vnode *vp;
409 struct smb_dev *sdp;
410 struct smb_share *ssp;
411 dev_t dev;
412 int error;
413
414 if ((fp = nsmb_getfp(scred->scr_p->p_fd, fd, FREAD | FWRITE)) == NULL)
415 return EBADF;
416 vp = (struct vnode*)fp->f_data;
417 if (vp == NULL)
418 return EBADF;
419 dev = vn_todev(vp);
420 if (dev == NODEV)
421 return EBADF;
422 SMB_CHECKMINOR(dev);
423 ssp = sdp->sd_share;
424 if (ssp == NULL)
425 return ENOTCONN;
426 error = smb_share_get(ssp, LK_EXCLUSIVE, scred);
427 if (error)
428 return error;
429 *sspp = ssp;
430 return 0;
431}
432