Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)
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FreeBSD/Linux Kernel Cross Reference
sys/netsmb/smb_dev.c
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1 /* $NetBSD: smb_dev.c,v 1.20 2005/02/26 22:39:50 perry Exp $ */ 2 3 /* 4 * Copyright (c) 2000-2001 Boris Popov 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgement: 17 * This product includes software developed by Boris Popov. 18 * 4. Neither the name of the author nor the names of any co-contributors 19 * may be used to endorse or promote products derived from this software 20 * without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 * 34 * FreeBSD: src/sys/netsmb/smb_dev.c,v 1.4 2001/12/02 08:47:29 bp Exp 35 */ 36 37 #include <sys/cdefs.h> 38 __KERNEL_RCSID(0, "$NetBSD: smb_dev.c,v 1.20 2005/02/26 22:39:50 perry Exp $"); 39 40 #include <sys/param.h> 41 #include <sys/kernel.h> 42 #include <sys/systm.h> 43 #include <sys/conf.h> 44 #include <sys/fcntl.h> 45 #include <sys/filedesc.h> 46 #include <sys/ioccom.h> 47 #include <sys/lock.h> 48 #include <sys/malloc.h> 49 #include <sys/file.h> /* Must come after sys/malloc.h */ 50 #include <sys/mbuf.h> 51 #include <sys/poll.h> 52 #include <sys/proc.h> 53 #include <sys/select.h> 54 #include <sys/socket.h> 55 #include <sys/socketvar.h> 56 #include <sys/sysctl.h> 57 #include <sys/uio.h> 58 #include <sys/vnode.h> 59 60 #include <miscfs/specfs/specdev.h> /* XXX */ 61 62 #include <net/if.h> 63 64 #include <netsmb/smb.h> 65 #include <netsmb/smb_conn.h> 66 #include <netsmb/smb_subr.h> 67 #include <netsmb/smb_dev.h> 68 #include <netsmb/smb_rq.h> 69 70 #ifdef __NetBSD__ 71 static struct smb_dev **smb_devtbl; /* indexed by minor */ 72 #define SMB_GETDEV(dev) (smb_devtbl[minor(dev)]) 73 #define NSMB_DEFNUM 4 74 75 #else /* !NetBSD */ 76 77 #define SMB_GETDEV(dev) ((struct smb_dev*)(dev)->si_drv1) 78 79 static d_open_t nsmb_dev_open; 80 static d_close_t nsmb_dev_close; 81 static d_read_t nsmb_dev_read; 82 static d_write_t nsmb_dev_write; 83 static d_ioctl_t nsmb_dev_ioctl; 84 static d_poll_t nsmb_dev_poll; 85 86 MODULE_DEPEND(netsmb, libiconv, 1, 1, 1); 87 MODULE_VERSION(netsmb, NSMB_VERSION); 88 89 static int smb_version = NSMB_VERSION; 90 91 92 SYSCTL_DECL(_net_smb); 93 SYSCTL_INT(_net_smb, OID_AUTO, version, CTLFLAG_RD, &smb_version, 0, ""); 94 #endif /* NetBSD */ 95 96 static MALLOC_DEFINE(M_NSMBDEV, "NETSMBDEV", "NET/SMB device"); 97 98 99 /* 100 int smb_dev_queue(struct smb_dev *ndp, struct smb_rq *rqp, int prio); 101 */ 102 103 #ifdef __NetBSD__ 104 dev_type_open(nsmb_dev_open); 105 dev_type_close(nsmb_dev_close); 106 dev_type_ioctl(nsmb_dev_ioctl); 107 108 const struct cdevsw nsmb_cdevsw = { 109 nsmb_dev_open, nsmb_dev_close, noread, nowrite, 110 nsmb_dev_ioctl, nostop, notty, nopoll, nommap, nokqfilter, 111 }; 112 #else 113 static struct cdevsw nsmb_cdevsw = { 114 /* open */ nsmb_dev_open, 115 /* close */ nsmb_dev_close, 116 /* read */ nsmb_dev_read, 117 /* write */ nsmb_dev_write, 118 /* ioctl */ nsmb_dev_ioctl, 119 /* poll */ nsmb_dev_poll, 120 /* mmap */ nommap, 121 /* strategy */ nostrategy, 122 /* name */ NSMB_NAME, 123 /* maj */ NSMB_MAJOR, 124 /* dump */ nodump, 125 /* psize */ nopsize, 126 /* flags */ 0, 127 }; 128 #endif /* !__NetBSD__ */ 129 130 #ifndef __NetBSD__ 131 static eventhandler_tag nsmb_dev_tag; 132 133 static void 134 nsmb_dev_clone(void *arg, char *name, int namelen, dev_t *dev) 135 { 136 int min; 137 138 if (*dev != NODEV) 139 return; 140 if (dev_stdclone(name, NULL, NSMB_NAME, &min) != 1) 141 return; 142 *dev = make_dev(&nsmb_cdevsw, min, 0, 0, 0600, NSMB_NAME"%d", min); 143 } 144 145 #else /* __NetBSD__ */ 146 147 void nsmbattach(int); 148 149 void 150 nsmbattach(int num) 151 { 152 153 if (num <= 0) { 154 #ifdef DIAGNOSTIC 155 panic("nsmbattach: cound <= 0"); 156 #endif 157 return; 158 } 159 160 if (num == 1) 161 num = NSMB_DEFNUM; 162 163 smb_devtbl = malloc(num * sizeof(void *), M_NSMBDEV, M_WAITOK|M_ZERO); 164 165 if (smb_sm_init()) { 166 #ifdef DIAGNOSTIC 167 panic("netsmbattach: smb_sm_init failed"); 168 #endif 169 return; 170 } 171 172 if (smb_iod_init()) { 173 #ifdef DIAGNOSTIC 174 panic("netsmbattach: smb_iod_init failed"); 175 #endif 176 smb_sm_done(); 177 return; 178 } 179 } 180 #endif /* __NetBSD__ */ 181 182 int 183 nsmb_dev_open(dev_t dev, int oflags, int devtype, struct proc *p) 184 { 185 struct smb_dev *sdp; 186 int s; 187 188 sdp = SMB_GETDEV(dev); 189 if (sdp && (sdp->sd_flags & NSMBFL_OPEN)) 190 return EBUSY; 191 if (sdp == NULL) { 192 sdp = malloc(sizeof(*sdp), M_NSMBDEV, M_WAITOK); 193 smb_devtbl[minor(dev)] = (void*)sdp; 194 } 195 196 #ifndef __NetBSD__ 197 /* 198 * XXX: this is just crazy - make a device for an already passed device... 199 * someone should take care of it. 200 */ 201 if ((dev->si_flags & SI_NAMED) == 0) 202 make_dev(&nsmb_cdevsw, minor(dev), cred->cr_uid, cred->cr_gid, 0700, 203 NSMB_NAME"%d", dev2unit(dev)); 204 #endif /* !__NetBSD__ */ 205 206 bzero(sdp, sizeof(*sdp)); 207 /* 208 STAILQ_INIT(&sdp->sd_rqlist); 209 STAILQ_INIT(&sdp->sd_rplist); 210 bzero(&sdp->sd_pollinfo, sizeof(struct selinfo)); 211 */ 212 s = splnet(); 213 sdp->sd_level = -1; 214 sdp->sd_flags |= NSMBFL_OPEN; 215 splx(s); 216 return 0; 217 } 218 219 int 220 nsmb_dev_close(dev_t dev, int flag, int fmt, struct proc *p) 221 { 222 struct smb_dev *sdp; 223 struct smb_vc *vcp; 224 struct smb_share *ssp; 225 struct smb_cred scred; 226 int s; 227 228 sdp = SMB_GETDEV(dev); 229 if (!sdp) 230 return (ENXIO); 231 232 s = splnet(); 233 if ((sdp->sd_flags & NSMBFL_OPEN) == 0) { 234 splx(s); 235 return EBADF; 236 } 237 smb_makescred(&scred, p, NULL); 238 ssp = sdp->sd_share; 239 if (ssp != NULL) { 240 smb_share_lock(ssp, 0); 241 smb_share_rele(ssp, &scred); 242 } 243 vcp = sdp->sd_vc; 244 if (vcp != NULL) { 245 smb_vc_lock(vcp, 0); 246 smb_vc_rele(vcp, &scred); 247 } 248 /* 249 smb_flushq(&sdp->sd_rqlist); 250 smb_flushq(&sdp->sd_rplist); 251 */ 252 smb_devtbl[minor(dev)] = NULL; 253 free(sdp, M_NSMBDEV); 254 #ifndef __NetBSD__ 255 destroy_dev(dev); 256 #endif 257 splx(s); 258 return 0; 259 } 260 261 262 int 263 nsmb_dev_ioctl(dev_t dev, u_long cmd, caddr_t data, int flag, struct proc *p) 264 { 265 struct smb_dev *sdp; 266 struct smb_vc *vcp; 267 struct smb_share *ssp; 268 struct smb_cred scred; 269 int error = 0; 270 271 sdp = SMB_GETDEV(dev); 272 if (!sdp) 273 return (ENXIO); 274 if ((sdp->sd_flags & NSMBFL_OPEN) == 0) 275 return EBADF; 276 277 smb_makescred(&scred, p, NULL); 278 switch (cmd) { 279 case SMBIOC_OPENSESSION: 280 if (sdp->sd_vc) 281 return EISCONN; 282 error = smb_usr_opensession((struct smbioc_ossn*)data, 283 &scred, &vcp); 284 if (error) 285 break; 286 sdp->sd_vc = vcp; 287 smb_vc_unlock(vcp, 0); 288 sdp->sd_level = SMBL_VC; 289 break; 290 case SMBIOC_OPENSHARE: 291 if (sdp->sd_share) 292 return EISCONN; 293 if (sdp->sd_vc == NULL) 294 return ENOTCONN; 295 error = smb_usr_openshare(sdp->sd_vc, 296 (struct smbioc_oshare*)data, &scred, &ssp); 297 if (error) 298 break; 299 sdp->sd_share = ssp; 300 smb_share_unlock(ssp, 0); 301 sdp->sd_level = SMBL_SHARE; 302 break; 303 case SMBIOC_REQUEST: 304 if (sdp->sd_share == NULL) 305 return ENOTCONN; 306 error = smb_usr_simplerequest(sdp->sd_share, 307 (struct smbioc_rq*)data, &scred); 308 break; 309 case SMBIOC_T2RQ: 310 if (sdp->sd_share == NULL) 311 return ENOTCONN; 312 error = smb_usr_t2request(sdp->sd_share, 313 (struct smbioc_t2rq*)data, &scred); 314 break; 315 case SMBIOC_SETFLAGS: { 316 struct smbioc_flags *fl = (struct smbioc_flags*)data; 317 int on; 318 319 if (fl->ioc_level == SMBL_VC) { 320 if (fl->ioc_mask & SMBV_PERMANENT) { 321 on = fl->ioc_flags & SMBV_PERMANENT; 322 if ((vcp = sdp->sd_vc) == NULL) 323 return ENOTCONN; 324 error = smb_vc_get(vcp, LK_EXCLUSIVE, &scred); 325 if (error) 326 break; 327 if (on && (vcp->obj.co_flags & SMBV_PERMANENT) == 0) { 328 vcp->obj.co_flags |= SMBV_PERMANENT; 329 smb_vc_ref(vcp); 330 } else if (!on && (vcp->obj.co_flags & SMBV_PERMANENT)) { 331 vcp->obj.co_flags &= ~SMBV_PERMANENT; 332 smb_vc_rele(vcp, &scred); 333 } 334 smb_vc_put(vcp, &scred); 335 } else 336 error = EINVAL; 337 } else if (fl->ioc_level == SMBL_SHARE) { 338 if (fl->ioc_mask & SMBS_PERMANENT) { 339 on = fl->ioc_flags & SMBS_PERMANENT; 340 if ((ssp = sdp->sd_share) == NULL) 341 return ENOTCONN; 342 error = smb_share_get(ssp, LK_EXCLUSIVE, &scred); 343 if (error) 344 break; 345 if (on && (ssp->obj.co_flags & SMBS_PERMANENT) == 0) { 346 ssp->obj.co_flags |= SMBS_PERMANENT; 347 smb_share_ref(ssp); 348 } else if (!on && (ssp->obj.co_flags & SMBS_PERMANENT)) { 349 ssp->obj.co_flags &= ~SMBS_PERMANENT; 350 smb_share_rele(ssp, &scred); 351 } 352 smb_share_put(ssp, &scred); 353 } else 354 error = EINVAL; 355 break; 356 } else 357 error = EINVAL; 358 break; 359 } 360 case SMBIOC_LOOKUP: 361 if (sdp->sd_vc || sdp->sd_share) 362 return EISCONN; 363 vcp = NULL; 364 ssp = NULL; 365 error = smb_usr_lookup((struct smbioc_lookup*)data, &scred, &vcp, &ssp); 366 if (error) 367 break; 368 if (vcp) { 369 sdp->sd_vc = vcp; 370 smb_vc_unlock(vcp, 0); 371 sdp->sd_level = SMBL_VC; 372 } 373 if (ssp) { 374 sdp->sd_share = ssp; 375 smb_share_unlock(ssp, 0); 376 sdp->sd_level = SMBL_SHARE; 377 } 378 break; 379 case SMBIOC_READ: case SMBIOC_WRITE: { 380 struct smbioc_rw *rwrq = (struct smbioc_rw*)data; 381 struct uio auio; 382 struct iovec iov; 383 384 if ((ssp = sdp->sd_share) == NULL) 385 return ENOTCONN; 386 iov.iov_base = rwrq->ioc_base; 387 iov.iov_len = rwrq->ioc_cnt; 388 auio.uio_iov = &iov; 389 auio.uio_iovcnt = 1; 390 auio.uio_offset = rwrq->ioc_offset; 391 auio.uio_resid = rwrq->ioc_cnt; 392 auio.uio_segflg = UIO_USERSPACE; 393 auio.uio_rw = (cmd == SMBIOC_READ) ? UIO_READ : UIO_WRITE; 394 auio.uio_procp = p; 395 if (cmd == SMBIOC_READ) 396 error = smb_read(ssp, rwrq->ioc_fh, &auio, &scred); 397 else 398 error = smb_write(ssp, rwrq->ioc_fh, &auio, &scred); 399 rwrq->ioc_cnt -= auio.uio_resid; 400 break; 401 } 402 default: 403 error = ENODEV; 404 } 405 return error; 406 } 407 408 #ifndef __NetBSD__ 409 int 410 nsmb_dev_read(dev_t dev, struct uio *uio, int flag) 411 { 412 return EACCES; 413 } 414 415 int 416 nsmb_dev_write(dev_t dev, struct uio *uio, int flag) 417 { 418 return EACCES; 419 } 420 421 int 422 nsmb_dev_poll(dev_t dev, int events, struct proc *p) 423 { 424 return ENODEV; 425 } 426 427 static int 428 nsmb_dev_load(module_t mod, int cmd, void *arg) 429 { 430 int error = 0; 431 432 switch (cmd) { 433 case MOD_LOAD: 434 error = smb_sm_init(); 435 if (error) 436 break; 437 error = smb_iod_init(); 438 if (error) { 439 smb_sm_done(); 440 break; 441 } 442 cdevsw_add(&nsmb_cdevsw); 443 nsmb_dev_tag = EVENTHANDLER_REGISTER(dev_clone, nsmb_dev_clone, 0, 1000); 444 printf("netsmb_dev: loaded\n"); 445 break; 446 case MOD_UNLOAD: 447 smb_iod_done(); 448 error = smb_sm_done(); 449 error = 0; 450 EVENTHANDLER_DEREGISTER(dev_clone, nsmb_dev_tag); 451 cdevsw_remove(&nsmb_cdevsw); 452 printf("netsmb_dev: unloaded\n"); 453 break; 454 default: 455 error = EINVAL; 456 break; 457 } 458 return error; 459 } 460 461 DEV_MODULE (dev_netsmb, nsmb_dev_load, 0); 462 #endif /* !__NetBSD__ */ 463 464 /* 465 * Convert a file descriptor to appropriate smb_share pointer 466 */ 467 int 468 smb_dev2share(int fd, int mode, struct smb_cred *scred, 469 struct smb_share **sspp) 470 { 471 struct proc *p = scred->scr_p; 472 struct file *fp; 473 struct vnode *vp; 474 struct smb_dev *sdp; 475 struct smb_share *ssp; 476 dev_t dev; 477 int error; 478 479 if ((fp = fd_getfile(p->p_fd, fd)) == NULL) 480 return (EBADF); 481 482 FILE_USE(fp); 483 484 vp = (struct vnode *) fp->f_data; 485 if (fp->f_type != DTYPE_VNODE 486 || (fp->f_flag & (FREAD|FWRITE)) == 0 487 || vp->v_type != VCHR 488 || vp->v_rdev == NODEV) { 489 FILE_UNUSE(fp, p); 490 return (EBADF); 491 } 492 493 dev = vp->v_rdev; 494 495 FILE_UNUSE(fp, p); 496 497 sdp = SMB_GETDEV(dev); 498 if (!sdp) 499 return (ENXIO); 500 ssp = sdp->sd_share; 501 if (ssp == NULL) 502 return ENOTCONN; 503 504 error = smb_share_get(ssp, LK_EXCLUSIVE, scred); 505 if (error) 506 return error; 507 508 *sspp = ssp; 509 return 0; 510 } 511
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