xref: /freebsd/sys/netsmb/smb_dev.c (revision f9218d3d4fd34f082473b3a021c6d4d109fb47cf)
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  * $FreeBSD$
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/filedesc.h>
44 #include <sys/mbuf.h>
45 #include <sys/poll.h>
46 #include <sys/proc.h>
47 #include <sys/select.h>
48 #include <sys/socket.h>
49 #include <sys/socketvar.h>
50 #include <sys/sysctl.h>
51 #include <sys/uio.h>
52 #include <sys/vnode.h>
53 
54 #include <net/if.h>
55 
56 #include <netsmb/smb.h>
57 #include <netsmb/smb_conn.h>
58 #include <netsmb/smb_subr.h>
59 #include <netsmb/smb_dev.h>
60 
61 #define SMB_GETDEV(dev)		((struct smb_dev*)(dev)->si_drv1)
62 #define	SMB_CHECKMINOR(dev)	do { \
63 				    sdp = SMB_GETDEV(dev); \
64 				    if (sdp == NULL) return ENXIO; \
65 				} while(0)
66 
67 static d_open_t	 nsmb_dev_open;
68 static d_close_t nsmb_dev_close;
69 static d_ioctl_t nsmb_dev_ioctl;
70 
71 MODULE_DEPEND(netsmb, libiconv, 1, 1, 1);
72 MODULE_VERSION(netsmb, NSMB_VERSION);
73 
74 static int smb_version = NSMB_VERSION;
75 
76 
77 SYSCTL_DECL(_net_smb);
78 SYSCTL_INT(_net_smb, OID_AUTO, version, CTLFLAG_RD, &smb_version, 0, "");
79 
80 static MALLOC_DEFINE(M_NSMBDEV, "NETSMBDEV", "NET/SMB device");
81 
82 
83 /*
84 int smb_dev_queue(struct smb_dev *ndp, struct smb_rq *rqp, int prio);
85 */
86 
87 static struct cdevsw nsmb_cdevsw = {
88 	.d_open =	nsmb_dev_open,
89 	.d_close =	nsmb_dev_close,
90 	.d_ioctl =	nsmb_dev_ioctl,
91 	.d_name =	NSMB_NAME,
92 	.d_maj =	NSMB_MAJOR,
93 #ifndef FB_CURRENT
94 	/* bmaj */	-1
95 #endif
96 };
97 
98 static eventhandler_tag nsmb_dev_tag;
99 
100 static void
101 nsmb_dev_clone(void *arg, char *name, int namelen, dev_t *dev)
102 {
103 	int u;
104 
105 	if (*dev != NODEV)
106 		return;
107 	if (dev_stdclone(name, NULL, NSMB_NAME, &u) != 1)
108 		return;
109 	*dev = make_dev(&nsmb_cdevsw, unit2minor(u), 0, 0, 0600,
110 	    NSMB_NAME"%d", u);
111 }
112 
113 static int
114 nsmb_dev_open(dev_t dev, int oflags, int devtype, struct thread *td)
115 {
116 	struct smb_dev *sdp;
117 	struct ucred *cred = td->td_ucred;
118 	int s;
119 
120 	sdp = SMB_GETDEV(dev);
121 	if (sdp && (sdp->sd_flags & NSMBFL_OPEN))
122 		return EBUSY;
123 	if (sdp == NULL) {
124 		sdp = malloc(sizeof(*sdp), M_NSMBDEV, M_WAITOK);
125 		dev->si_drv1 = (void*)sdp;
126 	}
127 	/*
128 	 * XXX: this is just crazy - make a device for an already passed device...
129 	 * someone should take care of it.
130 	 */
131 	if ((dev->si_flags & SI_NAMED) == 0)
132 		make_dev(&nsmb_cdevsw, minor(dev), cred->cr_uid, cred->cr_gid, 0700,
133 		    NSMB_NAME"%d", dev2unit(dev));
134 	bzero(sdp, sizeof(*sdp));
135 /*
136 	STAILQ_INIT(&sdp->sd_rqlist);
137 	STAILQ_INIT(&sdp->sd_rplist);
138 	bzero(&sdp->sd_pollinfo, sizeof(struct selinfo));
139 */
140 	s = splimp();
141 	sdp->sd_level = -1;
142 	sdp->sd_flags |= NSMBFL_OPEN;
143 	splx(s);
144 	return 0;
145 }
146 
147 static int
148 nsmb_dev_close(dev_t dev, int flag, int fmt, struct thread *td)
149 {
150 	struct smb_dev *sdp;
151 	struct smb_vc *vcp;
152 	struct smb_share *ssp;
153 	struct smb_cred scred;
154 	int s;
155 
156 	SMB_CHECKMINOR(dev);
157 	s = splimp();
158 	if ((sdp->sd_flags & NSMBFL_OPEN) == 0) {
159 		splx(s);
160 		return EBADF;
161 	}
162 	smb_makescred(&scred, td, NULL);
163 	ssp = sdp->sd_share;
164 	if (ssp != NULL)
165 		smb_share_rele(ssp, &scred);
166 	vcp = sdp->sd_vc;
167 	if (vcp != NULL)
168 		smb_vc_rele(vcp, &scred);
169 /*
170 	smb_flushq(&sdp->sd_rqlist);
171 	smb_flushq(&sdp->sd_rplist);
172 */
173 	dev->si_drv1 = NULL;
174 	free(sdp, M_NSMBDEV);
175 	destroy_dev(dev);
176 	splx(s);
177 	return 0;
178 }
179 
180 
181 static int
182 nsmb_dev_ioctl(dev_t dev, u_long cmd, caddr_t data, int flag, struct thread *td)
183 {
184 	struct smb_dev *sdp;
185 	struct smb_vc *vcp;
186 	struct smb_share *ssp;
187 	struct smb_cred scred;
188 	int error = 0;
189 
190 	SMB_CHECKMINOR(dev);
191 	if ((sdp->sd_flags & NSMBFL_OPEN) == 0)
192 		return EBADF;
193 
194 	smb_makescred(&scred, td, NULL);
195 	switch (cmd) {
196 	    case SMBIOC_OPENSESSION:
197 		if (sdp->sd_vc)
198 			return EISCONN;
199 		error = smb_usr_opensession((struct smbioc_ossn*)data,
200 		    &scred, &vcp);
201 		if (error)
202 			break;
203 		sdp->sd_vc = vcp;
204 		smb_vc_unlock(vcp, 0, td);
205 		sdp->sd_level = SMBL_VC;
206 		break;
207 	    case SMBIOC_OPENSHARE:
208 		if (sdp->sd_share)
209 			return EISCONN;
210 		if (sdp->sd_vc == NULL)
211 			return ENOTCONN;
212 		error = smb_usr_openshare(sdp->sd_vc,
213 		    (struct smbioc_oshare*)data, &scred, &ssp);
214 		if (error)
215 			break;
216 		sdp->sd_share = ssp;
217 		smb_share_unlock(ssp, 0, td);
218 		sdp->sd_level = SMBL_SHARE;
219 		break;
220 	    case SMBIOC_REQUEST:
221 		if (sdp->sd_share == NULL)
222 			return ENOTCONN;
223 		error = smb_usr_simplerequest(sdp->sd_share,
224 		    (struct smbioc_rq*)data, &scred);
225 		break;
226 	    case SMBIOC_T2RQ:
227 		if (sdp->sd_share == NULL)
228 			return ENOTCONN;
229 		error = smb_usr_t2request(sdp->sd_share,
230 		    (struct smbioc_t2rq*)data, &scred);
231 		break;
232 	    case SMBIOC_SETFLAGS: {
233 		struct smbioc_flags *fl = (struct smbioc_flags*)data;
234 		int on;
235 
236 		if (fl->ioc_level == SMBL_VC) {
237 			if (fl->ioc_mask & SMBV_PERMANENT) {
238 				on = fl->ioc_flags & SMBV_PERMANENT;
239 				if ((vcp = sdp->sd_vc) == NULL)
240 					return ENOTCONN;
241 				error = smb_vc_get(vcp, LK_EXCLUSIVE, &scred);
242 				if (error)
243 					break;
244 				if (on && (vcp->obj.co_flags & SMBV_PERMANENT) == 0) {
245 					vcp->obj.co_flags |= SMBV_PERMANENT;
246 					smb_vc_ref(vcp);
247 				} else if (!on && (vcp->obj.co_flags & SMBV_PERMANENT)) {
248 					vcp->obj.co_flags &= ~SMBV_PERMANENT;
249 					smb_vc_rele(vcp, &scred);
250 				}
251 				smb_vc_put(vcp, &scred);
252 			} else
253 				error = EINVAL;
254 		} else if (fl->ioc_level == SMBL_SHARE) {
255 			if (fl->ioc_mask & SMBS_PERMANENT) {
256 				on = fl->ioc_flags & SMBS_PERMANENT;
257 				if ((ssp = sdp->sd_share) == NULL)
258 					return ENOTCONN;
259 				error = smb_share_get(ssp, LK_EXCLUSIVE, &scred);
260 				if (error)
261 					break;
262 				if (on && (ssp->obj.co_flags & SMBS_PERMANENT) == 0) {
263 					ssp->obj.co_flags |= SMBS_PERMANENT;
264 					smb_share_ref(ssp);
265 				} else if (!on && (ssp->obj.co_flags & SMBS_PERMANENT)) {
266 					ssp->obj.co_flags &= ~SMBS_PERMANENT;
267 					smb_share_rele(ssp, &scred);
268 				}
269 				smb_share_put(ssp, &scred);
270 			} else
271 				error = EINVAL;
272 			break;
273 		} else
274 			error = EINVAL;
275 		break;
276 	    }
277 	    case SMBIOC_LOOKUP:
278 		if (sdp->sd_vc || sdp->sd_share)
279 			return EISCONN;
280 		vcp = NULL;
281 		ssp = NULL;
282 		error = smb_usr_lookup((struct smbioc_lookup*)data, &scred, &vcp, &ssp);
283 		if (error)
284 			break;
285 		if (vcp) {
286 			sdp->sd_vc = vcp;
287 			smb_vc_unlock(vcp, 0, td);
288 			sdp->sd_level = SMBL_VC;
289 		}
290 		if (ssp) {
291 			sdp->sd_share = ssp;
292 			smb_share_unlock(ssp, 0, td);
293 			sdp->sd_level = SMBL_SHARE;
294 		}
295 		break;
296 	    case SMBIOC_READ: case SMBIOC_WRITE: {
297 		struct smbioc_rw *rwrq = (struct smbioc_rw*)data;
298 		struct uio auio;
299 		struct iovec iov;
300 
301 		if ((ssp = sdp->sd_share) == NULL)
302 			return ENOTCONN;
303 		iov.iov_base = rwrq->ioc_base;
304 		iov.iov_len = rwrq->ioc_cnt;
305 		auio.uio_iov = &iov;
306 		auio.uio_iovcnt = 1;
307 		auio.uio_offset = rwrq->ioc_offset;
308 		auio.uio_resid = rwrq->ioc_cnt;
309 		auio.uio_segflg = UIO_USERSPACE;
310 		auio.uio_rw = (cmd == SMBIOC_READ) ? UIO_READ : UIO_WRITE;
311 		auio.uio_td = td;
312 		if (cmd == SMBIOC_READ)
313 			error = smb_read(ssp, rwrq->ioc_fh, &auio, &scred);
314 		else
315 			error = smb_write(ssp, rwrq->ioc_fh, &auio, &scred);
316 		rwrq->ioc_cnt -= auio.uio_resid;
317 		break;
318 	    }
319 	    default:
320 		error = ENODEV;
321 	}
322 	return error;
323 }
324 
325 static int
326 nsmb_dev_load(module_t mod, int cmd, void *arg)
327 {
328 	int error = 0;
329 
330 	switch (cmd) {
331 	    case MOD_LOAD:
332 		error = smb_sm_init();
333 		if (error)
334 			break;
335 		error = smb_iod_init();
336 		if (error) {
337 			smb_sm_done();
338 			break;
339 		}
340 		nsmb_dev_tag = EVENTHANDLER_REGISTER(dev_clone, nsmb_dev_clone, 0, 1000);
341 		printf("netsmb_dev: loaded\n");
342 		break;
343 	    case MOD_UNLOAD:
344 		smb_iod_done();
345 		error = smb_sm_done();
346 		error = 0;
347 		EVENTHANDLER_DEREGISTER(dev_clone, nsmb_dev_tag);
348 		printf("netsmb_dev: unloaded\n");
349 		break;
350 	    default:
351 		error = EINVAL;
352 		break;
353 	}
354 	return error;
355 }
356 
357 DEV_MODULE (dev_netsmb, nsmb_dev_load, 0);
358 
359 /*
360  * Convert a file descriptor to appropriate smb_share pointer
361  */
362 static struct file*
363 nsmb_getfp(struct filedesc* fdp, int fd, int flag)
364 {
365 	struct file* fp;
366 
367 	FILEDESC_LOCK(fdp);
368 	if (((u_int)fd) >= fdp->fd_nfiles ||
369 	    (fp = fdp->fd_ofiles[fd]) == NULL ||
370 	    (fp->f_flag & flag) == 0) {
371 		FILEDESC_UNLOCK(fdp);
372 		return (NULL);
373 	}
374 	fhold(fp);
375 	FILEDESC_UNLOCK(fdp);
376 	return (fp);
377 }
378 
379 int
380 smb_dev2share(int fd, int mode, struct smb_cred *scred,
381 	struct smb_share **sspp)
382 {
383 	struct file *fp;
384 	struct vnode *vp;
385 	struct smb_dev *sdp;
386 	struct smb_share *ssp;
387 	dev_t dev;
388 	int error;
389 
390 	fp = nsmb_getfp(scred->scr_td->td_proc->p_fd, fd, FREAD | FWRITE);
391 	if (fp == NULL)
392 		return EBADF;
393 	vp = fp->f_data;
394 	if (vp == NULL) {
395 		fdrop(fp, curthread);
396 		return EBADF;
397 	}
398 	dev = vn_todev(vp);
399 	if (dev == NODEV) {
400 		fdrop(fp, curthread);
401 		return EBADF;
402 	}
403 	SMB_CHECKMINOR(dev);
404 	ssp = sdp->sd_share;
405 	if (ssp == NULL) {
406 		fdrop(fp, curthread);
407 		return ENOTCONN;
408 	}
409 	error = smb_share_get(ssp, LK_EXCLUSIVE, scred);
410 	if (error == 0)
411 		*sspp = ssp;
412 	fdrop(fp, curthread);
413 	return error;
414 }
415 
416