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 /* 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 * $FreeBSD: releng/5.0/sys/netsmb/smb_dev.c 91406 2002-02-27 18:32:23Z jhb $ 33 */ 34 #include <sys/param.h> 35 #include <sys/kernel.h> 36 #include <sys/systm.h> 37 #include <sys/conf.h> 38 #include <sys/fcntl.h> 39 #include <sys/ioccom.h> 40 #include <sys/lock.h> 41 #include <sys/malloc.h> 42 #include <sys/file.h> /* Must come after sys/malloc.h */ 43 #include <sys/mbuf.h> 44 #include <sys/poll.h> 45 #include <sys/proc.h> 46 #include <sys/select.h> 47 #include <sys/socket.h> 48 #include <sys/socketvar.h> 49 #include <sys/sysctl.h> 50 #include <sys/uio.h> 51 #include <sys/vnode.h> 52 53 #include <net/if.h> 54 55 #include <netsmb/smb.h> 56 #include <netsmb/smb_conn.h> 57 #include <netsmb/smb_subr.h> 58 #include <netsmb/smb_dev.h> 59 60 #define SMB_GETDEV(dev) ((struct smb_dev*)(dev)->si_drv1) 61 #define SMB_CHECKMINOR(dev) do { \ 62 sdp = SMB_GETDEV(dev); \ 63 if (sdp == NULL) return ENXIO; \ 64 } while(0) 65 66 static d_open_t nsmb_dev_open; 67 static d_close_t nsmb_dev_close; 68 static d_read_t nsmb_dev_read; 69 static d_write_t nsmb_dev_write; 70 static d_ioctl_t nsmb_dev_ioctl; 71 static d_poll_t nsmb_dev_poll; 72 73 MODULE_DEPEND(netsmb, libiconv, 1, 1, 1); 74 MODULE_VERSION(netsmb, NSMB_VERSION); 75 76 static int smb_version = NSMB_VERSION; 77 78 79 SYSCTL_DECL(_net_smb); 80 SYSCTL_INT(_net_smb, OID_AUTO, version, CTLFLAG_RD, &smb_version, 0, ""); 81 82 static MALLOC_DEFINE(M_NSMBDEV, "NETSMBDEV", "NET/SMB device"); 83 84 85 /* 86 int smb_dev_queue(struct smb_dev *ndp, struct smb_rq *rqp, int prio); 87 */ 88 89 static struct cdevsw nsmb_cdevsw = { 90 /* open */ nsmb_dev_open, 91 /* close */ nsmb_dev_close, 92 /* read */ nsmb_dev_read, 93 /* write */ nsmb_dev_write, 94 /* ioctl */ nsmb_dev_ioctl, 95 /* poll */ nsmb_dev_poll, 96 /* mmap */ nommap, 97 /* strategy */ nostrategy, 98 /* name */ NSMB_NAME, 99 /* maj */ NSMB_MAJOR, 100 /* dump */ nodump, 101 /* psize */ nopsize, 102 /* flags */ 0, 103 #ifndef FB_CURRENT 104 /* bmaj */ -1 105 #endif 106 }; 107 108 static eventhandler_tag nsmb_dev_tag; 109 110 static void 111 nsmb_dev_clone(void *arg, char *name, int namelen, dev_t *dev) 112 { 113 int min; 114 115 if (*dev != NODEV) 116 return; 117 if (dev_stdclone(name, NULL, NSMB_NAME, &min) != 1) 118 return; 119 *dev = make_dev(&nsmb_cdevsw, min, 0, 0, 0600, NSMB_NAME"%d", min); 120 } 121 122 static int 123 nsmb_dev_open(dev_t dev, int oflags, int devtype, struct thread *td) 124 { 125 struct smb_dev *sdp; 126 struct ucred *cred = td->td_ucred; 127 int s; 128 129 sdp = SMB_GETDEV(dev); 130 if (sdp && (sdp->sd_flags & NSMBFL_OPEN)) 131 return EBUSY; 132 if (sdp == NULL) { 133 sdp = malloc(sizeof(*sdp), M_NSMBDEV, M_WAITOK); 134 dev->si_drv1 = (void*)sdp; 135 } 136 /* 137 * XXX: this is just crazy - make a device for an already passed device... 138 * someone should take care of it. 139 */ 140 if ((dev->si_flags & SI_NAMED) == 0) 141 make_dev(&nsmb_cdevsw, minor(dev), cred->cr_uid, cred->cr_gid, 0700, 142 NSMB_NAME"%d", dev2unit(dev)); 143 bzero(sdp, sizeof(*sdp)); 144 /* 145 STAILQ_INIT(&sdp->sd_rqlist); 146 STAILQ_INIT(&sdp->sd_rplist); 147 bzero(&sdp->sd_pollinfo, sizeof(struct selinfo)); 148 */ 149 s = splimp(); 150 sdp->sd_level = -1; 151 sdp->sd_flags |= NSMBFL_OPEN; 152 splx(s); 153 return 0; 154 } 155 156 static int 157 nsmb_dev_close(dev_t dev, int flag, int fmt, struct thread *td) 158 { 159 struct smb_dev *sdp; 160 struct smb_vc *vcp; 161 struct smb_share *ssp; 162 struct smb_cred scred; 163 int s; 164 165 SMB_CHECKMINOR(dev); 166 s = splimp(); 167 if ((sdp->sd_flags & NSMBFL_OPEN) == 0) { 168 splx(s); 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(dev); 185 splx(s); 186 return 0; 187 } 188 189 190 static int 191 nsmb_dev_ioctl(dev_t dev, u_long cmd, caddr_t data, int flag, struct thread *td) 192 { 193 struct smb_dev *sdp; 194 struct smb_vc *vcp; 195 struct smb_share *ssp; 196 struct smb_cred scred; 197 int error = 0; 198 199 SMB_CHECKMINOR(dev); 200 if ((sdp->sd_flags & NSMBFL_OPEN) == 0) 201 return EBADF; 202 203 smb_makescred(&scred, td, NULL); 204 switch (cmd) { 205 case SMBIOC_OPENSESSION: 206 if (sdp->sd_vc) 207 return EISCONN; 208 error = smb_usr_opensession((struct smbioc_ossn*)data, 209 &scred, &vcp); 210 if (error) 211 break; 212 sdp->sd_vc = vcp; 213 smb_vc_unlock(vcp, 0, td); 214 sdp->sd_level = SMBL_VC; 215 break; 216 case SMBIOC_OPENSHARE: 217 if (sdp->sd_share) 218 return EISCONN; 219 if (sdp->sd_vc == NULL) 220 return ENOTCONN; 221 error = smb_usr_openshare(sdp->sd_vc, 222 (struct smbioc_oshare*)data, &scred, &ssp); 223 if (error) 224 break; 225 sdp->sd_share = ssp; 226 smb_share_unlock(ssp, 0, td); 227 sdp->sd_level = SMBL_SHARE; 228 break; 229 case SMBIOC_REQUEST: 230 if (sdp->sd_share == NULL) 231 return ENOTCONN; 232 error = smb_usr_simplerequest(sdp->sd_share, 233 (struct smbioc_rq*)data, &scred); 234 break; 235 case SMBIOC_T2RQ: 236 if (sdp->sd_share == NULL) 237 return ENOTCONN; 238 error = smb_usr_t2request(sdp->sd_share, 239 (struct smbioc_t2rq*)data, &scred); 240 break; 241 case SMBIOC_SETFLAGS: { 242 struct smbioc_flags *fl = (struct smbioc_flags*)data; 243 int on; 244 245 if (fl->ioc_level == SMBL_VC) { 246 if (fl->ioc_mask & SMBV_PERMANENT) { 247 on = fl->ioc_flags & SMBV_PERMANENT; 248 if ((vcp = sdp->sd_vc) == NULL) 249 return ENOTCONN; 250 error = smb_vc_get(vcp, LK_EXCLUSIVE, &scred); 251 if (error) 252 break; 253 if (on && (vcp->obj.co_flags & SMBV_PERMANENT) == 0) { 254 vcp->obj.co_flags |= SMBV_PERMANENT; 255 smb_vc_ref(vcp); 256 } else if (!on && (vcp->obj.co_flags & SMBV_PERMANENT)) { 257 vcp->obj.co_flags &= ~SMBV_PERMANENT; 258 smb_vc_rele(vcp, &scred); 259 } 260 smb_vc_put(vcp, &scred); 261 } else 262 error = EINVAL; 263 } else if (fl->ioc_level == SMBL_SHARE) { 264 if (fl->ioc_mask & SMBS_PERMANENT) { 265 on = fl->ioc_flags & SMBS_PERMANENT; 266 if ((ssp = sdp->sd_share) == NULL) 267 return ENOTCONN; 268 error = smb_share_get(ssp, LK_EXCLUSIVE, &scred); 269 if (error) 270 break; 271 if (on && (ssp->obj.co_flags & SMBS_PERMANENT) == 0) { 272 ssp->obj.co_flags |= SMBS_PERMANENT; 273 smb_share_ref(ssp); 274 } else if (!on && (ssp->obj.co_flags & SMBS_PERMANENT)) { 275 ssp->obj.co_flags &= ~SMBS_PERMANENT; 276 smb_share_rele(ssp, &scred); 277 } 278 smb_share_put(ssp, &scred); 279 } else 280 error = EINVAL; 281 break; 282 } else 283 error = EINVAL; 284 break; 285 } 286 case SMBIOC_LOOKUP: 287 if (sdp->sd_vc || sdp->sd_share) 288 return EISCONN; 289 vcp = NULL; 290 ssp = NULL; 291 error = smb_usr_lookup((struct smbioc_lookup*)data, &scred, &vcp, &ssp); 292 if (error) 293 break; 294 if (vcp) { 295 sdp->sd_vc = vcp; 296 smb_vc_unlock(vcp, 0, td); 297 sdp->sd_level = SMBL_VC; 298 } 299 if (ssp) { 300 sdp->sd_share = ssp; 301 smb_share_unlock(ssp, 0, td); 302 sdp->sd_level = SMBL_SHARE; 303 } 304 break; 305 case SMBIOC_READ: case SMBIOC_WRITE: { 306 struct smbioc_rw *rwrq = (struct smbioc_rw*)data; 307 struct uio auio; 308 struct iovec iov; 309 310 if ((ssp = sdp->sd_share) == NULL) 311 return ENOTCONN; 312 iov.iov_base = rwrq->ioc_base; 313 iov.iov_len = rwrq->ioc_cnt; 314 auio.uio_iov = &iov; 315 auio.uio_iovcnt = 1; 316 auio.uio_offset = rwrq->ioc_offset; 317 auio.uio_resid = rwrq->ioc_cnt; 318 auio.uio_segflg = UIO_USERSPACE; 319 auio.uio_rw = (cmd == SMBIOC_READ) ? UIO_READ : UIO_WRITE; 320 auio.uio_td = td; 321 if (cmd == SMBIOC_READ) 322 error = smb_read(ssp, rwrq->ioc_fh, &auio, &scred); 323 else 324 error = smb_write(ssp, rwrq->ioc_fh, &auio, &scred); 325 rwrq->ioc_cnt -= auio.uio_resid; 326 break; 327 } 328 default: 329 error = ENODEV; 330 } 331 return error; 332 } 333 334 static int 335 nsmb_dev_read(dev_t dev, struct uio *uio, int flag) 336 { 337 return EACCES; 338 } 339 340 static int 341 nsmb_dev_write(dev_t dev, struct uio *uio, int flag) 342 { 343 return EACCES; 344 } 345 346 static int 347 nsmb_dev_poll(dev_t dev, int events, struct thread *td) 348 { 349 return ENODEV; 350 } 351 352 static int 353 nsmb_dev_load(module_t mod, int cmd, void *arg) 354 { 355 int error = 0; 356 357 switch (cmd) { 358 case MOD_LOAD: 359 error = smb_sm_init(); 360 if (error) 361 break; 362 error = smb_iod_init(); 363 if (error) { 364 smb_sm_done(); 365 break; 366 } 367 cdevsw_add(&nsmb_cdevsw); 368 nsmb_dev_tag = EVENTHANDLER_REGISTER(dev_clone, nsmb_dev_clone, 0, 1000); 369 printf("netsmb_dev: loaded\n"); 370 break; 371 case MOD_UNLOAD: 372 smb_iod_done(); 373 error = smb_sm_done(); 374 error = 0; 375 EVENTHANDLER_DEREGISTER(dev_clone, nsmb_dev_tag); 376 cdevsw_remove(&nsmb_cdevsw); 377 printf("netsmb_dev: unloaded\n"); 378 break; 379 default: 380 error = EINVAL; 381 break; 382 } 383 return error; 384 } 385 386 DEV_MODULE (dev_netsmb, nsmb_dev_load, 0); 387 388 /* 389 * Convert a file descriptor to appropriate smb_share pointer 390 */ 391 static struct file* 392 nsmb_getfp(struct filedesc* fdp, int fd, int flag) 393 { 394 struct file* fp; 395 396 FILEDESC_LOCK(fdp); 397 if (((u_int)fd) >= fdp->fd_nfiles || 398 (fp = fdp->fd_ofiles[fd]) == NULL || 399 (fp->f_flag & flag) == 0) { 400 FILEDESC_UNLOCK(fdp); 401 return (NULL); 402 } 403 fhold(fp); 404 FILEDESC_UNLOCK(fdp); 405 return (fp); 406 } 407 408 int 409 smb_dev2share(int fd, int mode, struct smb_cred *scred, 410 struct smb_share **sspp) 411 { 412 struct file *fp; 413 struct vnode *vp; 414 struct smb_dev *sdp; 415 struct smb_share *ssp; 416 dev_t dev; 417 int error; 418 419 fp = nsmb_getfp(scred->scr_td->td_proc->p_fd, fd, FREAD | FWRITE); 420 if (fp == NULL) 421 return EBADF; 422 vp = (struct vnode*)fp->f_data; 423 if (vp == NULL) { 424 fdrop(fp, curthread); 425 return EBADF; 426 } 427 dev = vn_todev(vp); 428 if (dev == NODEV) { 429 fdrop(fp, curthread); 430 return EBADF; 431 } 432 SMB_CHECKMINOR(dev); 433 ssp = sdp->sd_share; 434 if (ssp == NULL) { 435 fdrop(fp, curthread); 436 return ENOTCONN; 437 } 438 error = smb_share_get(ssp, LK_EXCLUSIVE, scred); 439 if (error == 0) 440 *sspp = ssp; 441 fdrop(fp, curthread); 442 return error; 443 } 444
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