FreeBSD/Linux Kernel Cross Reference
sys/netsmb/smb_dev.c
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("$FreeBSD$");
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
70 static d_open_t nsmb_dev_open;
71 static d_close_t nsmb_dev_close;
72 static d_ioctl_t nsmb_dev_ioctl;
73
74 MODULE_DEPEND(netsmb, libiconv, 1, 1, 2);
75 MODULE_VERSION(netsmb, NSMB_VERSION);
76
77 static int smb_version = NSMB_VERSION;
78
79
80 SYSCTL_DECL(_net_smb);
81 SYSCTL_INT(_net_smb, OID_AUTO, version, CTLFLAG_RD, &smb_version, 0, "");
82
83 static MALLOC_DEFINE(M_NSMBDEV, "NETSMBDEV", "NET/SMB device");
84
85
86 /*
87 int smb_dev_queue(struct smb_dev *ndp, struct smb_rq *rqp, int prio);
88 */
89
90 static struct cdevsw nsmb_cdevsw = {
91 .d_version = D_VERSION,
92 .d_flags = D_NEEDGIANT | D_NEEDMINOR,
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
99 static eventhandler_tag nsmb_dev_tag;
100 static struct clonedevs *nsmb_clones;
101
102 static void
103 nsmb_dev_clone(void *arg, struct ucred *cred, char *name, int namelen,
104 struct cdev **dev)
105 {
106 int i, u;
107
108 if (*dev != NULL)
109 return;
110
111 if (strcmp(name, NSMB_NAME) == 0)
112 u = -1;
113 else if (dev_stdclone(name, NULL, NSMB_NAME, &u) != 1)
114 return;
115 i = clone_create(&nsmb_clones, &nsmb_cdevsw, &u, dev, 0);
116 if (i) {
117 *dev = make_dev(&nsmb_cdevsw, u, UID_ROOT, GID_WHEEL, 0600,
118 "%s%d", NSMB_NAME, u);
119 if (*dev != NULL) {
120 dev_ref(*dev);
121 (*dev)->si_flags |= SI_CHEAPCLONE;
122 }
123 }
124 }
125
126 static int
127 nsmb_dev_open(struct cdev *dev, int oflags, int devtype, struct thread *td)
128 {
129 struct smb_dev *sdp;
130 struct ucred *cred = td->td_ucred;
131 int s;
132
133 sdp = SMB_GETDEV(dev);
134 if (sdp && (sdp->sd_flags & NSMBFL_OPEN))
135 return EBUSY;
136 if (sdp == NULL) {
137 sdp = malloc(sizeof(*sdp), M_NSMBDEV, M_WAITOK);
138 dev->si_drv1 = (void*)sdp;
139 }
140 /*
141 * XXX: this is just crazy - make a device for an already passed device...
142 * someone should take care of it.
143 */
144 if ((dev->si_flags & SI_NAMED) == 0)
145 make_dev(&nsmb_cdevsw, dev2unit(dev), cred->cr_uid,
146 cred->cr_gid, 0700, NSMB_NAME"%d", dev2unit(dev));
147 bzero(sdp, sizeof(*sdp));
148 /*
149 STAILQ_INIT(&sdp->sd_rqlist);
150 STAILQ_INIT(&sdp->sd_rplist);
151 bzero(&sdp->sd_pollinfo, sizeof(struct selinfo));
152 */
153 s = splimp();
154 sdp->sd_level = -1;
155 sdp->sd_flags |= NSMBFL_OPEN;
156 splx(s);
157 return 0;
158 }
159
160 static int
161 nsmb_dev_close(struct cdev *dev, int flag, int fmt, struct thread *td)
162 {
163 struct smb_dev *sdp;
164 struct smb_vc *vcp;
165 struct smb_share *ssp;
166 struct smb_cred scred;
167 int s;
168
169 SMB_CHECKMINOR(dev);
170 s = splimp();
171 if ((sdp->sd_flags & NSMBFL_OPEN) == 0) {
172 splx(s);
173 return EBADF;
174 }
175 smb_makescred(&scred, td, NULL);
176 ssp = sdp->sd_share;
177 if (ssp != NULL)
178 smb_share_rele(ssp, &scred);
179 vcp = sdp->sd_vc;
180 if (vcp != NULL)
181 smb_vc_rele(vcp, &scred);
182 /*
183 smb_flushq(&sdp->sd_rqlist);
184 smb_flushq(&sdp->sd_rplist);
185 */
186 dev->si_drv1 = NULL;
187 free(sdp, M_NSMBDEV);
188 destroy_dev_sched(dev);
189 splx(s);
190 return 0;
191 }
192
193
194 static int
195 nsmb_dev_ioctl(struct cdev *dev, u_long cmd, caddr_t data, int flag, struct thread *td)
196 {
197 struct smb_dev *sdp;
198 struct smb_vc *vcp;
199 struct smb_share *ssp;
200 struct smb_cred scred;
201 int error = 0;
202
203 SMB_CHECKMINOR(dev);
204 if ((sdp->sd_flags & NSMBFL_OPEN) == 0)
205 return EBADF;
206
207 smb_makescred(&scred, td, NULL);
208 switch (cmd) {
209 case SMBIOC_OPENSESSION:
210 if (sdp->sd_vc)
211 return EISCONN;
212 error = smb_usr_opensession((struct smbioc_ossn*)data,
213 &scred, &vcp);
214 if (error)
215 break;
216 sdp->sd_vc = vcp;
217 smb_vc_unlock(vcp, 0);
218 sdp->sd_level = SMBL_VC;
219 break;
220 case SMBIOC_OPENSHARE:
221 if (sdp->sd_share)
222 return EISCONN;
223 if (sdp->sd_vc == NULL)
224 return ENOTCONN;
225 error = smb_usr_openshare(sdp->sd_vc,
226 (struct smbioc_oshare*)data, &scred, &ssp);
227 if (error)
228 break;
229 sdp->sd_share = ssp;
230 smb_share_unlock(ssp, 0);
231 sdp->sd_level = SMBL_SHARE;
232 break;
233 case SMBIOC_REQUEST:
234 if (sdp->sd_share == NULL)
235 return ENOTCONN;
236 error = smb_usr_simplerequest(sdp->sd_share,
237 (struct smbioc_rq*)data, &scred);
238 break;
239 case SMBIOC_T2RQ:
240 if (sdp->sd_share == NULL)
241 return ENOTCONN;
242 error = smb_usr_t2request(sdp->sd_share,
243 (struct smbioc_t2rq*)data, &scred);
244 break;
245 case SMBIOC_SETFLAGS: {
246 struct smbioc_flags *fl = (struct smbioc_flags*)data;
247 int on;
248
249 if (fl->ioc_level == SMBL_VC) {
250 if (fl->ioc_mask & SMBV_PERMANENT) {
251 on = fl->ioc_flags & SMBV_PERMANENT;
252 if ((vcp = sdp->sd_vc) == NULL)
253 return ENOTCONN;
254 error = smb_vc_get(vcp, LK_EXCLUSIVE, &scred);
255 if (error)
256 break;
257 if (on && (vcp->obj.co_flags & SMBV_PERMANENT) == 0) {
258 vcp->obj.co_flags |= SMBV_PERMANENT;
259 smb_vc_ref(vcp);
260 } else if (!on && (vcp->obj.co_flags & SMBV_PERMANENT)) {
261 vcp->obj.co_flags &= ~SMBV_PERMANENT;
262 smb_vc_rele(vcp, &scred);
263 }
264 smb_vc_put(vcp, &scred);
265 } else
266 error = EINVAL;
267 } else if (fl->ioc_level == SMBL_SHARE) {
268 if (fl->ioc_mask & SMBS_PERMANENT) {
269 on = fl->ioc_flags & SMBS_PERMANENT;
270 if ((ssp = sdp->sd_share) == NULL)
271 return ENOTCONN;
272 error = smb_share_get(ssp, LK_EXCLUSIVE, &scred);
273 if (error)
274 break;
275 if (on && (ssp->obj.co_flags & SMBS_PERMANENT) == 0) {
276 ssp->obj.co_flags |= SMBS_PERMANENT;
277 smb_share_ref(ssp);
278 } else if (!on && (ssp->obj.co_flags & SMBS_PERMANENT)) {
279 ssp->obj.co_flags &= ~SMBS_PERMANENT;
280 smb_share_rele(ssp, &scred);
281 }
282 smb_share_put(ssp, &scred);
283 } else
284 error = EINVAL;
285 break;
286 } else
287 error = EINVAL;
288 break;
289 }
290 case SMBIOC_LOOKUP:
291 if (sdp->sd_vc || sdp->sd_share)
292 return EISCONN;
293 vcp = NULL;
294 ssp = NULL;
295 error = smb_usr_lookup((struct smbioc_lookup*)data, &scred, &vcp, &ssp);
296 if (error)
297 break;
298 if (vcp) {
299 sdp->sd_vc = vcp;
300 smb_vc_unlock(vcp, 0);
301 sdp->sd_level = SMBL_VC;
302 }
303 if (ssp) {
304 sdp->sd_share = ssp;
305 smb_share_unlock(ssp, 0);
306 sdp->sd_level = SMBL_SHARE;
307 }
308 break;
309 case SMBIOC_READ: case SMBIOC_WRITE: {
310 struct smbioc_rw *rwrq = (struct smbioc_rw*)data;
311 struct uio auio;
312 struct iovec iov;
313
314 if ((ssp = sdp->sd_share) == NULL)
315 return ENOTCONN;
316 iov.iov_base = rwrq->ioc_base;
317 iov.iov_len = rwrq->ioc_cnt;
318 auio.uio_iov = &iov;
319 auio.uio_iovcnt = 1;
320 auio.uio_offset = rwrq->ioc_offset;
321 auio.uio_resid = rwrq->ioc_cnt;
322 auio.uio_segflg = UIO_USERSPACE;
323 auio.uio_rw = (cmd == SMBIOC_READ) ? UIO_READ : UIO_WRITE;
324 auio.uio_td = td;
325 if (cmd == SMBIOC_READ)
326 error = smb_read(ssp, rwrq->ioc_fh, &auio, &scred);
327 else
328 error = smb_write(ssp, rwrq->ioc_fh, &auio, &scred);
329 rwrq->ioc_cnt -= auio.uio_resid;
330 break;
331 }
332 default:
333 error = ENODEV;
334 }
335 return error;
336 }
337
338 static int
339 nsmb_dev_load(module_t mod, int cmd, void *arg)
340 {
341 int error = 0;
342
343 switch (cmd) {
344 case MOD_LOAD:
345 error = smb_sm_init();
346 if (error)
347 break;
348 error = smb_iod_init();
349 if (error) {
350 smb_sm_done();
351 break;
352 }
353 clone_setup(&nsmb_clones);
354 nsmb_dev_tag = EVENTHANDLER_REGISTER(dev_clone, nsmb_dev_clone, 0, 1000);
355 printf("netsmb_dev: loaded\n");
356 break;
357 case MOD_UNLOAD:
358 smb_iod_done();
359 error = smb_sm_done();
360 if (error)
361 break;
362 EVENTHANDLER_DEREGISTER(dev_clone, nsmb_dev_tag);
363 drain_dev_clone_events();
364 clone_cleanup(&nsmb_clones);
365 destroy_dev_drain(&nsmb_cdevsw);
366 printf("netsmb_dev: unloaded\n");
367 break;
368 default:
369 error = EINVAL;
370 break;
371 }
372 return error;
373 }
374
375 DEV_MODULE (dev_netsmb, nsmb_dev_load, 0);
376
377 /*
378 * Convert a file descriptor to appropriate smb_share pointer
379 */
380 static struct file*
381 nsmb_getfp(struct filedesc* fdp, int fd, int flag)
382 {
383 struct file* fp;
384
385 FILEDESC_SLOCK(fdp);
386 if (((u_int)fd) >= fdp->fd_nfiles ||
387 (fp = fdp->fd_ofiles[fd]) == NULL ||
388 (fp->f_flag & flag) == 0) {
389 FILEDESC_SUNLOCK(fdp);
390 return (NULL);
391 }
392 fhold(fp);
393 FILEDESC_SUNLOCK(fdp);
394 return (fp);
395 }
396
397 int
398 smb_dev2share(int fd, int mode, struct smb_cred *scred,
399 struct smb_share **sspp)
400 {
401 struct file *fp;
402 struct vnode *vp;
403 struct smb_dev *sdp;
404 struct smb_share *ssp;
405 struct cdev *dev;
406 int error;
407
408 fp = nsmb_getfp(scred->scr_td->td_proc->p_fd, fd, FREAD | FWRITE);
409 if (fp == NULL)
410 return EBADF;
411 vp = fp->f_vnode;
412 if (vp == NULL) {
413 fdrop(fp, curthread);
414 return EBADF;
415 }
416 if (vp->v_type != VCHR) {
417 fdrop(fp, curthread);
418 return EBADF;
419 }
420 dev = vp->v_rdev;
421 SMB_CHECKMINOR(dev);
422 ssp = sdp->sd_share;
423 if (ssp == NULL) {
424 fdrop(fp, curthread);
425 return ENOTCONN;
426 }
427 error = smb_share_get(ssp, LK_EXCLUSIVE, scred);
428 if (error == 0)
429 *sspp = ssp;
430 fdrop(fp, curthread);
431 return error;
432 }
433
Cache object: 585ebc2dbb8c4bcc48dcef449421cf5b
|