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 } 425 426