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 } 433 434