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_read_t nsmb_dev_read; 70 static d_write_t nsmb_dev_write; 71 static d_ioctl_t nsmb_dev_ioctl; 72 static d_poll_t nsmb_dev_poll; 73 74 MODULE_DEPEND(netsmb, libiconv, 1, 1, 1); 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 /* open */ nsmb_dev_open, 92 /* close */ nsmb_dev_close, 93 /* read */ nsmb_dev_read, 94 /* write */ nsmb_dev_write, 95 /* ioctl */ nsmb_dev_ioctl, 96 /* poll */ nsmb_dev_poll, 97 /* mmap */ nommap, 98 /* strategy */ nostrategy, 99 /* name */ NSMB_NAME, 100 /* maj */ NSMB_MAJOR, 101 /* dump */ nodump, 102 /* psize */ nopsize, 103 /* flags */ 0, 104 #ifndef FB_CURRENT 105 /* bmaj */ -1 106 #endif 107 }; 108 109 static eventhandler_tag nsmb_dev_tag; 110 111 static void 112 nsmb_dev_clone(void *arg, char *name, int namelen, dev_t *dev) 113 { 114 int min; 115 116 if (*dev != NODEV) 117 return; 118 if (dev_stdclone(name, NULL, NSMB_NAME, &min) != 1) 119 return; 120 *dev = make_dev(&nsmb_cdevsw, min, 0, 0, 0600, NSMB_NAME"%d", min); 121 } 122 123 static int 124 nsmb_dev_open(dev_t dev, int oflags, int devtype, struct thread *td) 125 { 126 struct smb_dev *sdp; 127 struct ucred *cred = td->td_ucred; 128 int s; 129 130 sdp = SMB_GETDEV(dev); 131 if (sdp && (sdp->sd_flags & NSMBFL_OPEN)) 132 return EBUSY; 133 if (sdp == NULL) { 134 sdp = malloc(sizeof(*sdp), M_NSMBDEV, 0); 135 dev->si_drv1 = (void*)sdp; 136 } 137 /* 138 * XXX: this is just crazy - make a device for an already passed device... 139 * someone should take care of it. 140 */ 141 if ((dev->si_flags & SI_NAMED) == 0) 142 make_dev(&nsmb_cdevsw, minor(dev), cred->cr_uid, cred->cr_gid, 0700, 143 NSMB_NAME"%d", dev2unit(dev)); 144 bzero(sdp, sizeof(*sdp)); 145 /* 146 STAILQ_INIT(&sdp->sd_rqlist); 147 STAILQ_INIT(&sdp->sd_rplist); 148 bzero(&sdp->sd_pollinfo, sizeof(struct selinfo)); 149 */ 150 s = splimp(); 151 sdp->sd_level = -1; 152 sdp->sd_flags |= NSMBFL_OPEN; 153 splx(s); 154 return 0; 155 } 156 157 static int 158 nsmb_dev_close(dev_t dev, int flag, int fmt, struct thread *td) 159 { 160 struct smb_dev *sdp; 161 struct smb_vc *vcp; 162 struct smb_share *ssp; 163 struct smb_cred scred; 164 int s; 165 166 SMB_CHECKMINOR(dev); 167 s = splimp(); 168 if ((sdp->sd_flags & NSMBFL_OPEN) == 0) { 169 splx(s); 170 return EBADF; 171 } 172 smb_makescred(&scred, td, NULL); 173 ssp = sdp->sd_share; 174 if (ssp != NULL) 175 smb_share_rele(ssp, &scred); 176 vcp = sdp->sd_vc; 177 if (vcp != NULL) 178 smb_vc_rele(vcp, &scred); 179 /* 180 smb_flushq(&sdp->sd_rqlist); 181 smb_flushq(&sdp->sd_rplist); 182 */ 183 dev->si_drv1 = NULL; 184 free(sdp, M_NSMBDEV); 185 destroy_dev(dev); 186 splx(s); 187 return 0; 188 } 189 190 191 static int 192 nsmb_dev_ioctl(dev_t dev, u_long cmd, caddr_t data, int flag, struct thread *td) 193 { 194 struct smb_dev *sdp; 195 struct smb_vc *vcp; 196 struct smb_share *ssp; 197 struct smb_cred scred; 198 int error = 0; 199 200 SMB_CHECKMINOR(dev); 201 if ((sdp->sd_flags & NSMBFL_OPEN) == 0) 202 return EBADF; 203 204 smb_makescred(&scred, td, NULL); 205 switch (cmd) { 206 case SMBIOC_OPENSESSION: 207 if (sdp->sd_vc) 208 return EISCONN; 209 error = smb_usr_opensession((struct smbioc_ossn*)data, 210 &scred, &vcp); 211 if (error) 212 break; 213 sdp->sd_vc = vcp; 214 smb_vc_unlock(vcp, 0, td); 215 sdp->sd_level = SMBL_VC; 216 break; 217 case SMBIOC_OPENSHARE: 218 if (sdp->sd_share) 219 return EISCONN; 220 if (sdp->sd_vc == NULL) 221 return ENOTCONN; 222 error = smb_usr_openshare(sdp->sd_vc, 223 (struct smbioc_oshare*)data, &scred, &ssp); 224 if (error) 225 break; 226 sdp->sd_share = ssp; 227 smb_share_unlock(ssp, 0, td); 228 sdp->sd_level = SMBL_SHARE; 229 break; 230 case SMBIOC_REQUEST: 231 if (sdp->sd_share == NULL) 232 return ENOTCONN; 233 error = smb_usr_simplerequest(sdp->sd_share, 234 (struct smbioc_rq*)data, &scred); 235 break; 236 case SMBIOC_T2RQ: 237 if (sdp->sd_share == NULL) 238 return ENOTCONN; 239 error = smb_usr_t2request(sdp->sd_share, 240 (struct smbioc_t2rq*)data, &scred); 241 break; 242 case SMBIOC_SETFLAGS: { 243 struct smbioc_flags *fl = (struct smbioc_flags*)data; 244 int on; 245 246 if (fl->ioc_level == SMBL_VC) { 247 if (fl->ioc_mask & SMBV_PERMANENT) { 248 on = fl->ioc_flags & SMBV_PERMANENT; 249 if ((vcp = sdp->sd_vc) == NULL) 250 return ENOTCONN; 251 error = smb_vc_get(vcp, LK_EXCLUSIVE, &scred); 252 if (error) 253 break; 254 if (on && (vcp->obj.co_flags & SMBV_PERMANENT) == 0) { 255 vcp->obj.co_flags |= SMBV_PERMANENT; 256 smb_vc_ref(vcp); 257 } else if (!on && (vcp->obj.co_flags & SMBV_PERMANENT)) { 258 vcp->obj.co_flags &= ~SMBV_PERMANENT; 259 smb_vc_rele(vcp, &scred); 260 } 261 smb_vc_put(vcp, &scred); 262 } else 263 error = EINVAL; 264 } else if (fl->ioc_level == SMBL_SHARE) { 265 if (fl->ioc_mask & SMBS_PERMANENT) { 266 on = fl->ioc_flags & SMBS_PERMANENT; 267 if ((ssp = sdp->sd_share) == NULL) 268 return ENOTCONN; 269 error = smb_share_get(ssp, LK_EXCLUSIVE, &scred); 270 if (error) 271 break; 272 if (on && (ssp->obj.co_flags & SMBS_PERMANENT) == 0) { 273 ssp->obj.co_flags |= SMBS_PERMANENT; 274 smb_share_ref(ssp); 275 } else if (!on && (ssp->obj.co_flags & SMBS_PERMANENT)) { 276 ssp->obj.co_flags &= ~SMBS_PERMANENT; 277 smb_share_rele(ssp, &scred); 278 } 279 smb_share_put(ssp, &scred); 280 } else 281 error = EINVAL; 282 break; 283 } else 284 error = EINVAL; 285 break; 286 } 287 case SMBIOC_LOOKUP: 288 if (sdp->sd_vc || sdp->sd_share) 289 return EISCONN; 290 vcp = NULL; 291 ssp = NULL; 292 error = smb_usr_lookup((struct smbioc_lookup*)data, &scred, &vcp, &ssp); 293 if (error) 294 break; 295 if (vcp) { 296 sdp->sd_vc = vcp; 297 smb_vc_unlock(vcp, 0, td); 298 sdp->sd_level = SMBL_VC; 299 } 300 if (ssp) { 301 sdp->sd_share = ssp; 302 smb_share_unlock(ssp, 0, td); 303 sdp->sd_level = SMBL_SHARE; 304 } 305 break; 306 case SMBIOC_READ: case SMBIOC_WRITE: { 307 struct smbioc_rw *rwrq = (struct smbioc_rw*)data; 308 struct uio auio; 309 struct iovec iov; 310 311 if ((ssp = sdp->sd_share) == NULL) 312 return ENOTCONN; 313 iov.iov_base = rwrq->ioc_base; 314 iov.iov_len = rwrq->ioc_cnt; 315 auio.uio_iov = &iov; 316 auio.uio_iovcnt = 1; 317 auio.uio_offset = rwrq->ioc_offset; 318 auio.uio_resid = rwrq->ioc_cnt; 319 auio.uio_segflg = UIO_USERSPACE; 320 auio.uio_rw = (cmd == SMBIOC_READ) ? UIO_READ : UIO_WRITE; 321 auio.uio_td = td; 322 if (cmd == SMBIOC_READ) 323 error = smb_read(ssp, rwrq->ioc_fh, &auio, &scred); 324 else 325 error = smb_write(ssp, rwrq->ioc_fh, &auio, &scred); 326 rwrq->ioc_cnt -= auio.uio_resid; 327 break; 328 } 329 default: 330 error = ENODEV; 331 } 332 return error; 333 } 334 335 static int 336 nsmb_dev_read(dev_t dev, struct uio *uio, int flag) 337 { 338 return EACCES; 339 } 340 341 static int 342 nsmb_dev_write(dev_t dev, struct uio *uio, int flag) 343 { 344 return EACCES; 345 } 346 347 static int 348 nsmb_dev_poll(dev_t dev, int events, struct thread *td) 349 { 350 return ENODEV; 351 } 352 353 static int 354 nsmb_dev_load(module_t mod, int cmd, void *arg) 355 { 356 int error = 0; 357 358 switch (cmd) { 359 case MOD_LOAD: 360 error = smb_sm_init(); 361 if (error) 362 break; 363 error = smb_iod_init(); 364 if (error) { 365 smb_sm_done(); 366 break; 367 } 368 cdevsw_add(&nsmb_cdevsw); 369 nsmb_dev_tag = EVENTHANDLER_REGISTER(dev_clone, nsmb_dev_clone, 0, 1000); 370 printf("netsmb_dev: loaded\n"); 371 break; 372 case MOD_UNLOAD: 373 smb_iod_done(); 374 error = smb_sm_done(); 375 error = 0; 376 EVENTHANDLER_DEREGISTER(dev_clone, nsmb_dev_tag); 377 cdevsw_remove(&nsmb_cdevsw); 378 printf("netsmb_dev: unloaded\n"); 379 break; 380 default: 381 error = EINVAL; 382 break; 383 } 384 return error; 385 } 386 387 DEV_MODULE (dev_netsmb, nsmb_dev_load, 0); 388 389 /* 390 * Convert a file descriptor to appropriate smb_share pointer 391 */ 392 static struct file* 393 nsmb_getfp(struct filedesc* fdp, int fd, int flag) 394 { 395 struct file* fp; 396 397 FILEDESC_LOCK(fdp); 398 if (((u_int)fd) >= fdp->fd_nfiles || 399 (fp = fdp->fd_ofiles[fd]) == NULL || 400 (fp->f_flag & flag) == 0) { 401 FILEDESC_UNLOCK(fdp); 402 return (NULL); 403 } 404 fhold(fp); 405 FILEDESC_UNLOCK(fdp); 406 return (fp); 407 } 408 409 int 410 smb_dev2share(int fd, int mode, struct smb_cred *scred, 411 struct smb_share **sspp) 412 { 413 struct file *fp; 414 struct vnode *vp; 415 struct smb_dev *sdp; 416 struct smb_share *ssp; 417 dev_t dev; 418 int error; 419 420 fp = nsmb_getfp(scred->scr_td->td_proc->p_fd, fd, FREAD | FWRITE); 421 if (fp == NULL) 422 return EBADF; 423 vp = fp->f_data; 424 if (vp == NULL) { 425 fdrop(fp, curthread); 426 return EBADF; 427 } 428 dev = vn_todev(vp); 429 if (dev == NODEV) { 430 fdrop(fp, curthread); 431 return EBADF; 432 } 433 SMB_CHECKMINOR(dev); 434 ssp = sdp->sd_share; 435 if (ssp == NULL) { 436 fdrop(fp, curthread); 437 return ENOTCONN; 438 } 439 error = smb_share_get(ssp, LK_EXCLUSIVE, scred); 440 if (error == 0) 441 *sspp = ssp; 442 fdrop(fp, curthread); 443 return error; 444 } 445 446