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, 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; 100 101 static void 102 nsmb_dev_clone(void *arg, char *name, int namelen, struct cdev **dev) 103 { 104 int u; 105 106 if (*dev != NULL) 107 return; 108 if (dev_stdclone(name, NULL, NSMB_NAME, &u) != 1) 109 return; 110 *dev = make_dev(&nsmb_cdevsw, unit2minor(u), 0, 0, 0600, 111 NSMB_NAME"%d", u); 112 dev_ref(*dev); 113 } 114 115 static int 116 nsmb_dev_open(struct cdev *dev, int oflags, int devtype, struct thread *td) 117 { 118 struct smb_dev *sdp; 119 struct ucred *cred = td->td_ucred; 120 int s; 121 122 sdp = SMB_GETDEV(dev); 123 if (sdp && (sdp->sd_flags & NSMBFL_OPEN)) 124 return EBUSY; 125 if (sdp == NULL) { 126 sdp = malloc(sizeof(*sdp), M_NSMBDEV, M_WAITOK); 127 dev->si_drv1 = (void*)sdp; 128 } 129 /* 130 * XXX: this is just crazy - make a device for an already passed device... 131 * someone should take care of it. 132 */ 133 if ((dev->si_flags & SI_NAMED) == 0) 134 make_dev(&nsmb_cdevsw, minor(dev), cred->cr_uid, cred->cr_gid, 0700, 135 NSMB_NAME"%d", dev2unit(dev)); 136 bzero(sdp, sizeof(*sdp)); 137 /* 138 STAILQ_INIT(&sdp->sd_rqlist); 139 STAILQ_INIT(&sdp->sd_rplist); 140 bzero(&sdp->sd_pollinfo, sizeof(struct selinfo)); 141 */ 142 s = splimp(); 143 sdp->sd_level = -1; 144 sdp->sd_flags |= NSMBFL_OPEN; 145 splx(s); 146 return 0; 147 } 148 149 static int 150 nsmb_dev_close(struct cdev *dev, int flag, int fmt, struct thread *td) 151 { 152 struct smb_dev *sdp; 153 struct smb_vc *vcp; 154 struct smb_share *ssp; 155 struct smb_cred scred; 156 int s; 157 158 SMB_CHECKMINOR(dev); 159 s = splimp(); 160 if ((sdp->sd_flags & NSMBFL_OPEN) == 0) { 161 splx(s); 162 return EBADF; 163 } 164 smb_makescred(&scred, td, NULL); 165 ssp = sdp->sd_share; 166 if (ssp != NULL) 167 smb_share_rele(ssp, &scred); 168 vcp = sdp->sd_vc; 169 if (vcp != NULL) 170 smb_vc_rele(vcp, &scred); 171 /* 172 smb_flushq(&sdp->sd_rqlist); 173 smb_flushq(&sdp->sd_rplist); 174 */ 175 dev->si_drv1 = NULL; 176 free(sdp, M_NSMBDEV); 177 destroy_dev(dev); 178 splx(s); 179 return 0; 180 } 181 182 183 static int 184 nsmb_dev_ioctl(struct cdev *dev, u_long cmd, caddr_t data, int flag, struct thread *td) 185 { 186 struct smb_dev *sdp; 187 struct smb_vc *vcp; 188 struct smb_share *ssp; 189 struct smb_cred scred; 190 int error = 0; 191 192 SMB_CHECKMINOR(dev); 193 if ((sdp->sd_flags & NSMBFL_OPEN) == 0) 194 return EBADF; 195 196 smb_makescred(&scred, td, NULL); 197 switch (cmd) { 198 case SMBIOC_OPENSESSION: 199 if (sdp->sd_vc) 200 return EISCONN; 201 error = smb_usr_opensession((struct smbioc_ossn*)data, 202 &scred, &vcp); 203 if (error) 204 break; 205 sdp->sd_vc = vcp; 206 smb_vc_unlock(vcp, 0, td); 207 sdp->sd_level = SMBL_VC; 208 break; 209 case SMBIOC_OPENSHARE: 210 if (sdp->sd_share) 211 return EISCONN; 212 if (sdp->sd_vc == NULL) 213 return ENOTCONN; 214 error = smb_usr_openshare(sdp->sd_vc, 215 (struct smbioc_oshare*)data, &scred, &ssp); 216 if (error) 217 break; 218 sdp->sd_share = ssp; 219 smb_share_unlock(ssp, 0, td); 220 sdp->sd_level = SMBL_SHARE; 221 break; 222 case SMBIOC_REQUEST: 223 if (sdp->sd_share == NULL) 224 return ENOTCONN; 225 error = smb_usr_simplerequest(sdp->sd_share, 226 (struct smbioc_rq*)data, &scred); 227 break; 228 case SMBIOC_T2RQ: 229 if (sdp->sd_share == NULL) 230 return ENOTCONN; 231 error = smb_usr_t2request(sdp->sd_share, 232 (struct smbioc_t2rq*)data, &scred); 233 break; 234 case SMBIOC_SETFLAGS: { 235 struct smbioc_flags *fl = (struct smbioc_flags*)data; 236 int on; 237 238 if (fl->ioc_level == SMBL_VC) { 239 if (fl->ioc_mask & SMBV_PERMANENT) { 240 on = fl->ioc_flags & SMBV_PERMANENT; 241 if ((vcp = sdp->sd_vc) == NULL) 242 return ENOTCONN; 243 error = smb_vc_get(vcp, LK_EXCLUSIVE, &scred); 244 if (error) 245 break; 246 if (on && (vcp->obj.co_flags & SMBV_PERMANENT) == 0) { 247 vcp->obj.co_flags |= SMBV_PERMANENT; 248 smb_vc_ref(vcp); 249 } else if (!on && (vcp->obj.co_flags & SMBV_PERMANENT)) { 250 vcp->obj.co_flags &= ~SMBV_PERMANENT; 251 smb_vc_rele(vcp, &scred); 252 } 253 smb_vc_put(vcp, &scred); 254 } else 255 error = EINVAL; 256 } else if (fl->ioc_level == SMBL_SHARE) { 257 if (fl->ioc_mask & SMBS_PERMANENT) { 258 on = fl->ioc_flags & SMBS_PERMANENT; 259 if ((ssp = sdp->sd_share) == NULL) 260 return ENOTCONN; 261 error = smb_share_get(ssp, LK_EXCLUSIVE, &scred); 262 if (error) 263 break; 264 if (on && (ssp->obj.co_flags & SMBS_PERMANENT) == 0) { 265 ssp->obj.co_flags |= SMBS_PERMANENT; 266 smb_share_ref(ssp); 267 } else if (!on && (ssp->obj.co_flags & SMBS_PERMANENT)) { 268 ssp->obj.co_flags &= ~SMBS_PERMANENT; 269 smb_share_rele(ssp, &scred); 270 } 271 smb_share_put(ssp, &scred); 272 } else 273 error = EINVAL; 274 break; 275 } else 276 error = EINVAL; 277 break; 278 } 279 case SMBIOC_LOOKUP: 280 if (sdp->sd_vc || sdp->sd_share) 281 return EISCONN; 282 vcp = NULL; 283 ssp = NULL; 284 error = smb_usr_lookup((struct smbioc_lookup*)data, &scred, &vcp, &ssp); 285 if (error) 286 break; 287 if (vcp) { 288 sdp->sd_vc = vcp; 289 smb_vc_unlock(vcp, 0, td); 290 sdp->sd_level = SMBL_VC; 291 } 292 if (ssp) { 293 sdp->sd_share = ssp; 294 smb_share_unlock(ssp, 0, td); 295 sdp->sd_level = SMBL_SHARE; 296 } 297 break; 298 case SMBIOC_READ: case SMBIOC_WRITE: { 299 struct smbioc_rw *rwrq = (struct smbioc_rw*)data; 300 struct uio auio; 301 struct iovec iov; 302 303 if ((ssp = sdp->sd_share) == NULL) 304 return ENOTCONN; 305 iov.iov_base = rwrq->ioc_base; 306 iov.iov_len = rwrq->ioc_cnt; 307 auio.uio_iov = &iov; 308 auio.uio_iovcnt = 1; 309 auio.uio_offset = rwrq->ioc_offset; 310 auio.uio_resid = rwrq->ioc_cnt; 311 auio.uio_segflg = UIO_USERSPACE; 312 auio.uio_rw = (cmd == SMBIOC_READ) ? UIO_READ : UIO_WRITE; 313 auio.uio_td = td; 314 if (cmd == SMBIOC_READ) 315 error = smb_read(ssp, rwrq->ioc_fh, &auio, &scred); 316 else 317 error = smb_write(ssp, rwrq->ioc_fh, &auio, &scred); 318 rwrq->ioc_cnt -= auio.uio_resid; 319 break; 320 } 321 default: 322 error = ENODEV; 323 } 324 return error; 325 } 326 327 static int 328 nsmb_dev_load(module_t mod, int cmd, void *arg) 329 { 330 int error = 0; 331 332 switch (cmd) { 333 case MOD_LOAD: 334 error = smb_sm_init(); 335 if (error) 336 break; 337 error = smb_iod_init(); 338 if (error) { 339 smb_sm_done(); 340 break; 341 } 342 nsmb_dev_tag = EVENTHANDLER_REGISTER(dev_clone, nsmb_dev_clone, 0, 1000); 343 printf("netsmb_dev: loaded\n"); 344 break; 345 case MOD_UNLOAD: 346 smb_iod_done(); 347 error = smb_sm_done(); 348 error = 0; 349 EVENTHANDLER_DEREGISTER(dev_clone, nsmb_dev_tag); 350 printf("netsmb_dev: unloaded\n"); 351 break; 352 default: 353 error = EINVAL; 354 break; 355 } 356 return error; 357 } 358 359 DEV_MODULE (dev_netsmb, nsmb_dev_load, 0); 360 361 /* 362 * Convert a file descriptor to appropriate smb_share pointer 363 */ 364 static struct file* 365 nsmb_getfp(struct filedesc* fdp, int fd, int flag) 366 { 367 struct file* fp; 368 369 FILEDESC_LOCK(fdp); 370 if (((u_int)fd) >= fdp->fd_nfiles || 371 (fp = fdp->fd_ofiles[fd]) == NULL || 372 (fp->f_flag & flag) == 0) { 373 FILEDESC_UNLOCK(fdp); 374 return (NULL); 375 } 376 fhold(fp); 377 FILEDESC_UNLOCK(fdp); 378 return (fp); 379 } 380 381 int 382 smb_dev2share(int fd, int mode, struct smb_cred *scred, 383 struct smb_share **sspp) 384 { 385 struct file *fp; 386 struct vnode *vp; 387 struct smb_dev *sdp; 388 struct smb_share *ssp; 389 struct cdev *dev; 390 int error; 391 392 fp = nsmb_getfp(scred->scr_td->td_proc->p_fd, fd, FREAD | FWRITE); 393 if (fp == NULL) 394 return EBADF; 395 vp = fp->f_vnode; 396 if (vp == NULL) { 397 fdrop(fp, curthread); 398 return EBADF; 399 } 400 if (vp->v_type != VCHR) { 401 fdrop(fp, curthread); 402 return EBADF; 403 } 404 dev = vp->v_rdev; 405 SMB_CHECKMINOR(dev); 406 ssp = sdp->sd_share; 407 if (ssp == NULL) { 408 fdrop(fp, curthread); 409 return ENOTCONN; 410 } 411 error = smb_share_get(ssp, LK_EXCLUSIVE, scred); 412 if (error == 0) 413 *sspp = ssp; 414 fdrop(fp, curthread); 415 return error; 416 } 417 418