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 scred = malloc(sizeof(struct smb_cred), M_NSMBDEV, M_WAITOK); 164 SMB_CHECKMINOR(dev); 165 s = splimp(); 166 if ((sdp->sd_flags & NSMBFL_OPEN) == 0) { 167 splx(s); 168 free(scred, M_NSMBDEV); 169 return EBADF; 170 } 171 smb_makescred(scred, td, NULL); 172 ssp = sdp->sd_share; 173 if (ssp != NULL) 174 smb_share_rele(ssp, scred); 175 vcp = sdp->sd_vc; 176 if (vcp != NULL) 177 smb_vc_rele(vcp, scred); 178 /* 179 smb_flushq(&sdp->sd_rqlist); 180 smb_flushq(&sdp->sd_rplist); 181 */ 182 dev->si_drv1 = NULL; 183 free(sdp, M_NSMBDEV); 184 destroy_dev_sched(dev); 185 splx(s); 186 free(scred, M_NSMBDEV); 187 return 0; 188 } 189 190 191 static int 192 nsmb_dev_ioctl(struct cdev *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 scred = malloc(sizeof(struct smb_cred), M_NSMBDEV, M_WAITOK); 205 smb_makescred(scred, td, NULL); 206 switch (cmd) { 207 case SMBIOC_OPENSESSION: 208 if (sdp->sd_vc) { 209 error = EISCONN; 210 goto out; 211 } 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 error = EISCONN; 223 goto out; 224 } 225 if (sdp->sd_vc == NULL) { 226 error = ENOTCONN; 227 goto out; 228 } 229 error = smb_usr_openshare(sdp->sd_vc, 230 (struct smbioc_oshare*)data, scred, &ssp); 231 if (error) 232 break; 233 sdp->sd_share = ssp; 234 smb_share_unlock(ssp, 0); 235 sdp->sd_level = SMBL_SHARE; 236 break; 237 case SMBIOC_REQUEST: 238 if (sdp->sd_share == NULL) { 239 error = ENOTCONN; 240 goto out; 241 } 242 error = smb_usr_simplerequest(sdp->sd_share, 243 (struct smbioc_rq*)data, scred); 244 break; 245 case SMBIOC_T2RQ: 246 if (sdp->sd_share == NULL) { 247 error = ENOTCONN; 248 goto out; 249 } 250 error = smb_usr_t2request(sdp->sd_share, 251 (struct smbioc_t2rq*)data, scred); 252 break; 253 case SMBIOC_SETFLAGS: { 254 struct smbioc_flags *fl = (struct smbioc_flags*)data; 255 int on; 256 257 if (fl->ioc_level == SMBL_VC) { 258 if (fl->ioc_mask & SMBV_PERMANENT) { 259 on = fl->ioc_flags & SMBV_PERMANENT; 260 if ((vcp = sdp->sd_vc) == NULL) { 261 error = ENOTCONN; 262 goto out; 263 } 264 error = smb_vc_get(vcp, LK_EXCLUSIVE, scred); 265 if (error) 266 break; 267 if (on && (vcp->obj.co_flags & SMBV_PERMANENT) == 0) { 268 vcp->obj.co_flags |= SMBV_PERMANENT; 269 smb_vc_ref(vcp); 270 } else if (!on && (vcp->obj.co_flags & SMBV_PERMANENT)) { 271 vcp->obj.co_flags &= ~SMBV_PERMANENT; 272 smb_vc_rele(vcp, scred); 273 } 274 smb_vc_put(vcp, scred); 275 } else 276 error = EINVAL; 277 } else if (fl->ioc_level == SMBL_SHARE) { 278 if (fl->ioc_mask & SMBS_PERMANENT) { 279 on = fl->ioc_flags & SMBS_PERMANENT; 280 if ((ssp = sdp->sd_share) == NULL) { 281 error = ENOTCONN; 282 goto out; 283 } 284 error = smb_share_get(ssp, LK_EXCLUSIVE, scred); 285 if (error) 286 break; 287 if (on && (ssp->obj.co_flags & SMBS_PERMANENT) == 0) { 288 ssp->obj.co_flags |= SMBS_PERMANENT; 289 smb_share_ref(ssp); 290 } else if (!on && (ssp->obj.co_flags & SMBS_PERMANENT)) { 291 ssp->obj.co_flags &= ~SMBS_PERMANENT; 292 smb_share_rele(ssp, scred); 293 } 294 smb_share_put(ssp, scred); 295 } else 296 error = EINVAL; 297 break; 298 } else 299 error = EINVAL; 300 break; 301 } 302 case SMBIOC_LOOKUP: 303 if (sdp->sd_vc || sdp->sd_share) { 304 error = EISCONN; 305 goto out; 306 } 307 vcp = NULL; 308 ssp = NULL; 309 error = smb_usr_lookup((struct smbioc_lookup*)data, scred, &vcp, &ssp); 310 if (error) 311 break; 312 if (vcp) { 313 sdp->sd_vc = vcp; 314 smb_vc_unlock(vcp, 0); 315 sdp->sd_level = SMBL_VC; 316 } 317 if (ssp) { 318 sdp->sd_share = ssp; 319 smb_share_unlock(ssp, 0); 320 sdp->sd_level = SMBL_SHARE; 321 } 322 break; 323 case SMBIOC_READ: case SMBIOC_WRITE: { 324 struct smbioc_rw *rwrq = (struct smbioc_rw*)data; 325 struct uio auio; 326 struct iovec iov; 327 328 if ((ssp = sdp->sd_share) == NULL) { 329 error = ENOTCONN; 330 goto out; 331 } 332 iov.iov_base = rwrq->ioc_base; 333 iov.iov_len = rwrq->ioc_cnt; 334 auio.uio_iov = &iov; 335 auio.uio_iovcnt = 1; 336 auio.uio_offset = rwrq->ioc_offset; 337 auio.uio_resid = rwrq->ioc_cnt; 338 auio.uio_segflg = UIO_USERSPACE; 339 auio.uio_rw = (cmd == SMBIOC_READ) ? UIO_READ : UIO_WRITE; 340 auio.uio_td = td; 341 if (cmd == SMBIOC_READ) 342 error = smb_read(ssp, rwrq->ioc_fh, &auio, scred); 343 else 344 error = smb_write(ssp, rwrq->ioc_fh, &auio, scred); 345 rwrq->ioc_cnt -= auio.uio_resid; 346 break; 347 } 348 default: 349 error = ENODEV; 350 } 351 out: 352 free(scred, M_NSMBDEV); 353 return error; 354 } 355 356 static int 357 nsmb_dev_load(module_t mod, int cmd, void *arg) 358 { 359 int error = 0; 360 361 switch (cmd) { 362 case MOD_LOAD: 363 error = smb_sm_init(); 364 if (error) 365 break; 366 error = smb_iod_init(); 367 if (error) { 368 smb_sm_done(); 369 break; 370 } 371 clone_setup(&nsmb_clones); 372 nsmb_dev_tag = EVENTHANDLER_REGISTER(dev_clone, nsmb_dev_clone, 0, 1000); 373 break; 374 case MOD_UNLOAD: 375 smb_iod_done(); 376 error = smb_sm_done(); 377 if (error) 378 break; 379 EVENTHANDLER_DEREGISTER(dev_clone, nsmb_dev_tag); 380 drain_dev_clone_events(); 381 clone_cleanup(&nsmb_clones); 382 destroy_dev_drain(&nsmb_cdevsw); 383 break; 384 default: 385 error = EINVAL; 386 break; 387 } 388 return error; 389 } 390 391 DEV_MODULE (dev_netsmb, nsmb_dev_load, 0); 392 393 /* 394 * Convert a file descriptor to appropriate smb_share pointer 395 */ 396 static struct file* 397 nsmb_getfp(struct filedesc* fdp, int fd, int flag) 398 { 399 struct file* fp; 400 401 FILEDESC_SLOCK(fdp); 402 if ((fp = fget_locked(fdp, fd)) == NULL || (fp->f_flag & flag) == 0) { 403 FILEDESC_SUNLOCK(fdp); 404 return (NULL); 405 } 406 fhold(fp); 407 FILEDESC_SUNLOCK(fdp); 408 return (fp); 409 } 410 411 int 412 smb_dev2share(int fd, int mode, struct smb_cred *scred, 413 struct smb_share **sspp) 414 { 415 struct file *fp; 416 struct vnode *vp; 417 struct smb_dev *sdp; 418 struct smb_share *ssp; 419 struct cdev *dev; 420 int error; 421 422 fp = nsmb_getfp(scred->scr_td->td_proc->p_fd, fd, FREAD | FWRITE); 423 if (fp == NULL) 424 return EBADF; 425 vp = fp->f_vnode; 426 if (vp == NULL) { 427 fdrop(fp, curthread); 428 return EBADF; 429 } 430 if (vp->v_type != VCHR) { 431 fdrop(fp, curthread); 432 return EBADF; 433 } 434 dev = vp->v_rdev; 435 SMB_CHECKMINOR(dev); 436 ssp = sdp->sd_share; 437 if (ssp == NULL) { 438 fdrop(fp, curthread); 439 return ENOTCONN; 440 } 441 error = smb_share_get(ssp, LK_EXCLUSIVE, scred); 442 if (error == 0) 443 *sspp = ssp; 444 fdrop(fp, curthread); 445 return error; 446 } 447 448