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 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 */
26
27 #include <sys/cdefs.h>
28 __FBSDID("$FreeBSD$");
29
30 #include <sys/param.h>
31 #include <sys/kernel.h>
32 #include <sys/module.h>
33 #include <sys/systm.h>
34 #include <sys/conf.h>
35 #include <sys/fcntl.h>
36 #include <sys/ioccom.h>
37 #include <sys/lock.h>
38 #include <sys/malloc.h>
39 #include <sys/file.h> /* Must come after sys/malloc.h */
40 #include <sys/filedesc.h>
41 #include <sys/mbuf.h>
42 #include <sys/poll.h>
43 #include <sys/proc.h>
44 #include <sys/select.h>
45 #include <sys/socket.h>
46 #include <sys/socketvar.h>
47 #include <sys/sysctl.h>
48 #include <sys/uio.h>
49 #include <sys/vnode.h>
50
51 #include <net/if.h>
52
53 #include <netsmb/smb.h>
54 #include <netsmb/smb_conn.h>
55 #include <netsmb/smb_subr.h>
56 #include <netsmb/smb_dev.h>
57
58 #define SMB_GETDEV(dev) ((struct smb_dev*)(dev)->si_drv1)
59 #define SMB_CHECKMINOR(dev) do { \
60 sdp = SMB_GETDEV(dev); \
61 if (sdp == NULL) return ENXIO; \
62 } while(0)
63
64 static d_open_t nsmb_dev_open;
65 static d_close_t nsmb_dev_close;
66 static d_ioctl_t nsmb_dev_ioctl;
67
68 MODULE_DEPEND(netsmb, libiconv, 1, 1, 2);
69 MODULE_VERSION(netsmb, NSMB_VERSION);
70
71 static int smb_version = NSMB_VERSION;
72
73
74 SYSCTL_DECL(_net_smb);
75 SYSCTL_INT(_net_smb, OID_AUTO, version, CTLFLAG_RD, &smb_version, 0, "");
76
77 static MALLOC_DEFINE(M_NSMBDEV, "NETSMBDEV", "NET/SMB device");
78
79
80 /*
81 int smb_dev_queue(struct smb_dev *ndp, struct smb_rq *rqp, int prio);
82 */
83
84 static struct cdevsw nsmb_cdevsw = {
85 .d_version = D_VERSION,
86 .d_flags = D_NEEDGIANT | D_NEEDMINOR,
87 .d_open = nsmb_dev_open,
88 .d_close = nsmb_dev_close,
89 .d_ioctl = nsmb_dev_ioctl,
90 .d_name = NSMB_NAME
91 };
92
93 static eventhandler_tag nsmb_dev_tag;
94 static struct clonedevs *nsmb_clones;
95
96 static void
97 nsmb_dev_clone(void *arg, struct ucred *cred, char *name, int namelen,
98 struct cdev **dev)
99 {
100 int i, u;
101
102 if (*dev != NULL)
103 return;
104
105 if (strcmp(name, NSMB_NAME) == 0)
106 u = -1;
107 else if (dev_stdclone(name, NULL, NSMB_NAME, &u) != 1)
108 return;
109 i = clone_create(&nsmb_clones, &nsmb_cdevsw, &u, dev, 0);
110 if (i) {
111 *dev = make_dev(&nsmb_cdevsw, u, UID_ROOT, GID_WHEEL, 0600,
112 "%s%d", NSMB_NAME, u);
113 if (*dev != NULL) {
114 dev_ref(*dev);
115 (*dev)->si_flags |= SI_CHEAPCLONE;
116 }
117 }
118 }
119
120 static int
121 nsmb_dev_open(struct cdev *dev, int oflags, int devtype, struct thread *td)
122 {
123 struct smb_dev *sdp;
124 struct ucred *cred = td->td_ucred;
125 int s;
126
127 sdp = SMB_GETDEV(dev);
128 if (sdp && (sdp->sd_flags & NSMBFL_OPEN))
129 return EBUSY;
130 if (sdp == NULL) {
131 sdp = malloc(sizeof(*sdp), M_NSMBDEV, M_WAITOK);
132 dev->si_drv1 = (void*)sdp;
133 }
134 /*
135 * XXX: this is just crazy - make a device for an already passed device...
136 * someone should take care of it.
137 */
138 if ((dev->si_flags & SI_NAMED) == 0)
139 make_dev(&nsmb_cdevsw, dev2unit(dev), cred->cr_uid,
140 cred->cr_gid, 0700, NSMB_NAME"%d", dev2unit(dev));
141 bzero(sdp, sizeof(*sdp));
142 /*
143 STAILQ_INIT(&sdp->sd_rqlist);
144 STAILQ_INIT(&sdp->sd_rplist);
145 bzero(&sdp->sd_pollinfo, sizeof(struct selinfo));
146 */
147 s = splimp();
148 sdp->sd_level = -1;
149 sdp->sd_flags |= NSMBFL_OPEN;
150 splx(s);
151 return 0;
152 }
153
154 static int
155 nsmb_dev_close(struct cdev *dev, int flag, int fmt, struct thread *td)
156 {
157 struct smb_dev *sdp;
158 struct smb_vc *vcp;
159 struct smb_share *ssp;
160 struct smb_cred scred;
161 int s;
162
163 SMB_CHECKMINOR(dev);
164 s = splimp();
165 if ((sdp->sd_flags & NSMBFL_OPEN) == 0) {
166 splx(s);
167 return EBADF;
168 }
169 smb_makescred(&scred, td, NULL);
170 ssp = sdp->sd_share;
171 if (ssp != NULL)
172 smb_share_rele(ssp, &scred);
173 vcp = sdp->sd_vc;
174 if (vcp != NULL)
175 smb_vc_rele(vcp, &scred);
176 /*
177 smb_flushq(&sdp->sd_rqlist);
178 smb_flushq(&sdp->sd_rplist);
179 */
180 dev->si_drv1 = NULL;
181 free(sdp, M_NSMBDEV);
182 destroy_dev_sched(dev);
183 splx(s);
184 return 0;
185 }
186
187
188 static int
189 nsmb_dev_ioctl(struct cdev *dev, u_long cmd, caddr_t data, int flag, struct thread *td)
190 {
191 struct smb_dev *sdp;
192 struct smb_vc *vcp;
193 struct smb_share *ssp;
194 struct smb_cred scred;
195 int error = 0;
196
197 SMB_CHECKMINOR(dev);
198 if ((sdp->sd_flags & NSMBFL_OPEN) == 0)
199 return EBADF;
200
201 smb_makescred(&scred, td, NULL);
202 switch (cmd) {
203 case SMBIOC_OPENSESSION:
204 if (sdp->sd_vc)
205 return EISCONN;
206 error = smb_usr_opensession((struct smbioc_ossn*)data,
207 &scred, &vcp);
208 if (error)
209 break;
210 sdp->sd_vc = vcp;
211 smb_vc_unlock(vcp, 0);
212 sdp->sd_level = SMBL_VC;
213 break;
214 case SMBIOC_OPENSHARE:
215 if (sdp->sd_share)
216 return EISCONN;
217 if (sdp->sd_vc == NULL)
218 return ENOTCONN;
219 error = smb_usr_openshare(sdp->sd_vc,
220 (struct smbioc_oshare*)data, &scred, &ssp);
221 if (error)
222 break;
223 sdp->sd_share = ssp;
224 smb_share_unlock(ssp, 0);
225 sdp->sd_level = SMBL_SHARE;
226 break;
227 case SMBIOC_REQUEST:
228 if (sdp->sd_share == NULL)
229 return ENOTCONN;
230 error = smb_usr_simplerequest(sdp->sd_share,
231 (struct smbioc_rq*)data, &scred);
232 break;
233 case SMBIOC_T2RQ:
234 if (sdp->sd_share == NULL)
235 return ENOTCONN;
236 error = smb_usr_t2request(sdp->sd_share,
237 (struct smbioc_t2rq*)data, &scred);
238 break;
239 case SMBIOC_SETFLAGS: {
240 struct smbioc_flags *fl = (struct smbioc_flags*)data;
241 int on;
242
243 if (fl->ioc_level == SMBL_VC) {
244 if (fl->ioc_mask & SMBV_PERMANENT) {
245 on = fl->ioc_flags & SMBV_PERMANENT;
246 if ((vcp = sdp->sd_vc) == NULL)
247 return ENOTCONN;
248 error = smb_vc_get(vcp, LK_EXCLUSIVE, &scred);
249 if (error)
250 break;
251 if (on && (vcp->obj.co_flags & SMBV_PERMANENT) == 0) {
252 vcp->obj.co_flags |= SMBV_PERMANENT;
253 smb_vc_ref(vcp);
254 } else if (!on && (vcp->obj.co_flags & SMBV_PERMANENT)) {
255 vcp->obj.co_flags &= ~SMBV_PERMANENT;
256 smb_vc_rele(vcp, &scred);
257 }
258 smb_vc_put(vcp, &scred);
259 } else
260 error = EINVAL;
261 } else if (fl->ioc_level == SMBL_SHARE) {
262 if (fl->ioc_mask & SMBS_PERMANENT) {
263 on = fl->ioc_flags & SMBS_PERMANENT;
264 if ((ssp = sdp->sd_share) == NULL)
265 return ENOTCONN;
266 error = smb_share_get(ssp, LK_EXCLUSIVE, &scred);
267 if (error)
268 break;
269 if (on && (ssp->obj.co_flags & SMBS_PERMANENT) == 0) {
270 ssp->obj.co_flags |= SMBS_PERMANENT;
271 smb_share_ref(ssp);
272 } else if (!on && (ssp->obj.co_flags & SMBS_PERMANENT)) {
273 ssp->obj.co_flags &= ~SMBS_PERMANENT;
274 smb_share_rele(ssp, &scred);
275 }
276 smb_share_put(ssp, &scred);
277 } else
278 error = EINVAL;
279 break;
280 } else
281 error = EINVAL;
282 break;
283 }
284 case SMBIOC_LOOKUP:
285 if (sdp->sd_vc || sdp->sd_share)
286 return EISCONN;
287 vcp = NULL;
288 ssp = NULL;
289 error = smb_usr_lookup((struct smbioc_lookup*)data, &scred, &vcp, &ssp);
290 if (error)
291 break;
292 if (vcp) {
293 sdp->sd_vc = vcp;
294 smb_vc_unlock(vcp, 0);
295 sdp->sd_level = SMBL_VC;
296 }
297 if (ssp) {
298 sdp->sd_share = ssp;
299 smb_share_unlock(ssp, 0);
300 sdp->sd_level = SMBL_SHARE;
301 }
302 break;
303 case SMBIOC_READ: case SMBIOC_WRITE: {
304 struct smbioc_rw *rwrq = (struct smbioc_rw*)data;
305 struct uio auio;
306 struct iovec iov;
307
308 if ((ssp = sdp->sd_share) == NULL)
309 return ENOTCONN;
310 iov.iov_base = rwrq->ioc_base;
311 iov.iov_len = rwrq->ioc_cnt;
312 auio.uio_iov = &iov;
313 auio.uio_iovcnt = 1;
314 auio.uio_offset = rwrq->ioc_offset;
315 auio.uio_resid = rwrq->ioc_cnt;
316 auio.uio_segflg = UIO_USERSPACE;
317 auio.uio_rw = (cmd == SMBIOC_READ) ? UIO_READ : UIO_WRITE;
318 auio.uio_td = td;
319 if (cmd == SMBIOC_READ)
320 error = smb_read(ssp, rwrq->ioc_fh, &auio, &scred);
321 else
322 error = smb_write(ssp, rwrq->ioc_fh, &auio, &scred);
323 rwrq->ioc_cnt -= auio.uio_resid;
324 break;
325 }
326 default:
327 error = ENODEV;
328 }
329 return error;
330 }
331
332 static int
333 nsmb_dev_load(module_t mod, int cmd, void *arg)
334 {
335 int error = 0;
336
337 switch (cmd) {
338 case MOD_LOAD:
339 error = smb_sm_init();
340 if (error)
341 break;
342 error = smb_iod_init();
343 if (error) {
344 smb_sm_done();
345 break;
346 }
347 clone_setup(&nsmb_clones);
348 nsmb_dev_tag = EVENTHANDLER_REGISTER(dev_clone, nsmb_dev_clone, 0, 1000);
349 break;
350 case MOD_UNLOAD:
351 smb_iod_done();
352 error = smb_sm_done();
353 if (error)
354 break;
355 EVENTHANDLER_DEREGISTER(dev_clone, nsmb_dev_tag);
356 drain_dev_clone_events();
357 clone_cleanup(&nsmb_clones);
358 destroy_dev_drain(&nsmb_cdevsw);
359 break;
360 default:
361 error = EINVAL;
362 break;
363 }
364 return error;
365 }
366
367 DEV_MODULE (dev_netsmb, nsmb_dev_load, 0);
368
369 /*
370 * Convert a file descriptor to appropriate smb_share pointer
371 */
372 static struct file*
373 nsmb_getfp(struct filedesc* fdp, int fd, int flag)
374 {
375 struct file* fp;
376
377 FILEDESC_SLOCK(fdp);
378 if (((u_int)fd) >= fdp->fd_nfiles ||
379 (fp = fdp->fd_ofiles[fd]) == NULL ||
380 (fp->f_flag & flag) == 0) {
381 FILEDESC_SUNLOCK(fdp);
382 return (NULL);
383 }
384 fhold(fp);
385 FILEDESC_SUNLOCK(fdp);
386 return (fp);
387 }
388
389 int
390 smb_dev2share(int fd, int mode, struct smb_cred *scred,
391 struct smb_share **sspp)
392 {
393 struct file *fp;
394 struct vnode *vp;
395 struct smb_dev *sdp;
396 struct smb_share *ssp;
397 struct cdev *dev;
398 int error;
399
400 fp = nsmb_getfp(scred->scr_td->td_proc->p_fd, fd, FREAD | FWRITE);
401 if (fp == NULL)
402 return EBADF;
403 vp = fp->f_vnode;
404 if (vp == NULL) {
405 fdrop(fp, curthread);
406 return EBADF;
407 }
408 if (vp->v_type != VCHR) {
409 fdrop(fp, curthread);
410 return EBADF;
411 }
412 dev = vp->v_rdev;
413 SMB_CHECKMINOR(dev);
414 ssp = sdp->sd_share;
415 if (ssp == NULL) {
416 fdrop(fp, curthread);
417 return ENOTCONN;
418 }
419 error = smb_share_get(ssp, LK_EXCLUSIVE, scred);
420 if (error == 0)
421 *sspp = ssp;
422 fdrop(fp, curthread);
423 return error;
424 }
425
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