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: src/sys/netsmb/smb_dev.c,v 1.2.2.1 2001/05/22 08:32:33 bp Exp $ 33 * $DragonFly: src/sys/netproto/smb/smb_dev.c,v 1.11 2005/06/22 01:33:31 dillon Exp $ 34 */ 35 #include <sys/param.h> 36 #include <sys/kernel.h> 37 #include <sys/systm.h> 38 #include <sys/conf.h> 39 #include <sys/fcntl.h> 40 #include <sys/ioccom.h> 41 #include <sys/malloc.h> 42 #include <sys/file.h> /* Must come after sys/malloc.h */ 43 #include <sys/poll.h> 44 #include <sys/proc.h> 45 #include <sys/select.h> 46 #include <sys/socket.h> 47 #include <sys/socketvar.h> 48 #include <sys/sysctl.h> 49 #include <sys/uio.h> 50 #include <sys/vnode.h> 51 #include <sys/thread2.h> 52 53 #include <net/if.h> 54 55 #include "smb.h" 56 #include "smb_conn.h" 57 #include "smb_subr.h" 58 #include "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_VERSION(netsmb, NSMB_VERSION); 74 75 #define SI_NAMED 0 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 /* name */ NSMB_NAME, 92 /* maj */ NSMB_MAJOR, 93 /* flags */ 0, 94 /* port */ NULL, 95 /* clone */ NULL, 96 97 /* open */ nsmb_dev_open, 98 /* close */ nsmb_dev_close, 99 /* read */ nsmb_dev_read, 100 /* write */ nsmb_dev_write, 101 /* ioctl */ nsmb_dev_ioctl, 102 /* poll */ nsmb_dev_poll, 103 /* mmap */ nommap, 104 /* strategy */ nostrategy, 105 /* dump */ nodump, 106 /* psize */ nopsize 107 }; 108 109 110 static int 111 nsmb_dev_open(dev_t dev, int oflags, int devtype, d_thread_t *td) 112 { 113 struct proc *p = td->td_proc; 114 struct smb_dev *sdp; 115 struct ucred *cred; 116 117 KKASSERT(p != NULL); 118 cred = p->p_ucred; 119 120 sdp = SMB_GETDEV(dev); 121 if (sdp && (sdp->sd_flags & NSMBFL_OPEN)) 122 return EBUSY; 123 if (sdp == NULL) { 124 sdp = malloc(sizeof(*sdp), M_NSMBDEV, M_WAITOK); 125 dev->si_drv1 = (void*)sdp; 126 } 127 /* 128 * XXX: this is just crazy - make a device for an already passed 129 * device... someone should take care of it. 130 */ 131 if ((dev->si_flags & SI_NAMED) == 0) { 132 make_dev(&nsmb_cdevsw, minor(dev), cred->cr_uid, cred->cr_gid, 133 0700, NSMB_NAME"%d", lminor(dev)); 134 } 135 bzero(sdp, sizeof(*sdp)); 136 /* 137 STAILQ_INIT(&sdp->sd_rqlist); 138 STAILQ_INIT(&sdp->sd_rplist); 139 bzero(&sdp->sd_pollinfo, sizeof(struct selinfo)); 140 */ 141 crit_enter(); 142 sdp->sd_level = -1; 143 sdp->sd_flags |= NSMBFL_OPEN; 144 crit_exit(); 145 return 0; 146 } 147 148 static int 149 nsmb_dev_close(dev_t dev, int flag, int fmt, d_thread_t *td) 150 { 151 struct smb_dev *sdp; 152 struct smb_vc *vcp; 153 struct smb_share *ssp; 154 struct smb_cred scred; 155 156 SMB_CHECKMINOR(dev); 157 crit_enter(); 158 if ((sdp->sd_flags & NSMBFL_OPEN) == 0) { 159 crit_exit(); 160 return EBADF; 161 } 162 smb_makescred(&scred, td, NULL); 163 ssp = sdp->sd_share; 164 if (ssp != NULL) 165 smb_share_rele(ssp, &scred); 166 vcp = sdp->sd_vc; 167 if (vcp != NULL) 168 smb_vc_rele(vcp, &scred); 169 /* 170 smb_flushq(&sdp->sd_rqlist); 171 smb_flushq(&sdp->sd_rplist); 172 */ 173 dev->si_drv1 = NULL; 174 free(sdp, M_NSMBDEV); 175 crit_exit(); 176 return 0; 177 } 178 179 180 static int 181 nsmb_dev_ioctl(dev_t dev, u_long cmd, caddr_t data, int flag, d_thread_t *td) 182 { 183 struct smb_dev *sdp; 184 struct smb_vc *vcp; 185 struct smb_share *ssp; 186 struct smb_cred scred; 187 int error = 0; 188 189 SMB_CHECKMINOR(dev); 190 if ((sdp->sd_flags & NSMBFL_OPEN) == 0) 191 return EBADF; 192 193 smb_makescred(&scred, td, NULL); 194 switch (cmd) { 195 case SMBIOC_OPENSESSION: 196 if (sdp->sd_vc) 197 return EISCONN; 198 error = smb_usr_opensession((struct smbioc_ossn*)data, 199 &scred, &vcp); 200 if (error) 201 break; 202 sdp->sd_vc = vcp; 203 smb_vc_unlock(vcp, 0, td); 204 sdp->sd_level = SMBL_VC; 205 break; 206 case SMBIOC_OPENSHARE: 207 if (sdp->sd_share) 208 return EISCONN; 209 if (sdp->sd_vc == NULL) 210 return ENOTCONN; 211 error = smb_usr_openshare(sdp->sd_vc, 212 (struct smbioc_oshare*)data, &scred, &ssp); 213 if (error) 214 break; 215 sdp->sd_share = ssp; 216 smb_share_unlock(ssp, 0, td); 217 sdp->sd_level = SMBL_SHARE; 218 break; 219 case SMBIOC_REQUEST: 220 if (sdp->sd_share == NULL) 221 return ENOTCONN; 222 error = smb_usr_simplerequest(sdp->sd_share, 223 (struct smbioc_rq*)data, &scred); 224 break; 225 case SMBIOC_T2RQ: 226 if (sdp->sd_share == NULL) 227 return ENOTCONN; 228 error = smb_usr_t2request(sdp->sd_share, 229 (struct smbioc_t2rq*)data, &scred); 230 break; 231 case SMBIOC_SETFLAGS: { 232 struct smbioc_flags *fl = (struct smbioc_flags*)data; 233 int on; 234 235 if (fl->ioc_level == SMBL_VC) { 236 if (fl->ioc_mask & SMBV_PERMANENT) { 237 on = fl->ioc_flags & SMBV_PERMANENT; 238 if ((vcp = sdp->sd_vc) == NULL) 239 return ENOTCONN; 240 error = smb_vc_get(vcp, LK_EXCLUSIVE, &scred); 241 if (error) 242 break; 243 if (on && (vcp->obj.co_flags & SMBV_PERMANENT) == 0) { 244 vcp->obj.co_flags |= SMBV_PERMANENT; 245 smb_vc_ref(vcp, td); 246 } else if (!on && (vcp->obj.co_flags & SMBV_PERMANENT)) { 247 vcp->obj.co_flags &= ~SMBV_PERMANENT; 248 smb_vc_rele(vcp, &scred); 249 } 250 smb_vc_put(vcp, &scred); 251 } else 252 error = EINVAL; 253 } else if (fl->ioc_level == SMBL_SHARE) { 254 if (fl->ioc_mask & SMBS_PERMANENT) { 255 on = fl->ioc_flags & SMBS_PERMANENT; 256 if ((ssp = sdp->sd_share) == NULL) 257 return ENOTCONN; 258 error = smb_share_get(ssp, LK_EXCLUSIVE, &scred); 259 if (error) 260 break; 261 if (on && (ssp->obj.co_flags & SMBS_PERMANENT) == 0) { 262 ssp->obj.co_flags |= SMBS_PERMANENT; 263 smb_share_ref(ssp, td); 264 } else if (!on && (ssp->obj.co_flags & SMBS_PERMANENT)) { 265 ssp->obj.co_flags &= ~SMBS_PERMANENT; 266 smb_share_rele(ssp, &scred); 267 } 268 smb_share_put(ssp, &scred); 269 } else 270 error = EINVAL; 271 break; 272 } else 273 error = EINVAL; 274 break; 275 } 276 case SMBIOC_LOOKUP: 277 if (sdp->sd_vc || sdp->sd_share) 278 return EISCONN; 279 vcp = NULL; 280 ssp = NULL; 281 error = smb_usr_lookup((struct smbioc_lookup*)data, &scred, &vcp, &ssp); 282 if (error) 283 break; 284 if (vcp) { 285 sdp->sd_vc = vcp; 286 smb_vc_unlock(vcp, 0, td); 287 sdp->sd_level = SMBL_VC; 288 } 289 if (ssp) { 290 sdp->sd_share = ssp; 291 smb_share_unlock(ssp, 0, td); 292 sdp->sd_level = SMBL_SHARE; 293 } 294 break; 295 case SMBIOC_READ: case SMBIOC_WRITE: { 296 struct smbioc_rw *rwrq = (struct smbioc_rw*)data; 297 struct uio auio; 298 struct iovec iov; 299 300 if ((ssp = sdp->sd_share) == NULL) 301 return ENOTCONN; 302 iov.iov_base = rwrq->ioc_base; 303 iov.iov_len = rwrq->ioc_cnt; 304 auio.uio_iov = &iov; 305 auio.uio_iovcnt = 1; 306 auio.uio_offset = rwrq->ioc_offset; 307 auio.uio_resid = rwrq->ioc_cnt; 308 auio.uio_segflg = UIO_USERSPACE; 309 auio.uio_rw = (cmd == SMBIOC_READ) ? UIO_READ : UIO_WRITE; 310 auio.uio_td = td; 311 if (cmd == SMBIOC_READ) 312 error = smb_read(ssp, rwrq->ioc_fh, &auio, &scred); 313 else 314 error = smb_write(ssp, rwrq->ioc_fh, &auio, &scred); 315 rwrq->ioc_cnt -= auio.uio_resid; 316 break; 317 } 318 default: 319 error = ENODEV; 320 } 321 return error; 322 } 323 324 static int 325 nsmb_dev_read(dev_t dev, struct uio *uio, int flag) 326 { 327 return EACCES; 328 } 329 330 static int 331 nsmb_dev_write(dev_t dev, struct uio *uio, int flag) 332 { 333 return EACCES; 334 } 335 336 static int 337 nsmb_dev_poll(dev_t dev, int events, d_thread_t *td) 338 { 339 return ENODEV; 340 } 341 342 static int 343 nsmb_dev_load(module_t mod, int cmd, void *arg) 344 { 345 int error = 0; 346 347 switch (cmd) { 348 case MOD_LOAD: 349 error = smb_sm_init(); 350 if (error) 351 break; 352 error = smb_iod_init(); 353 if (error) { 354 smb_sm_done(); 355 break; 356 } 357 cdevsw_add(&nsmb_cdevsw, 0, 0); 358 printf("netsmb_dev: loaded\n"); 359 break; 360 case MOD_UNLOAD: 361 smb_iod_done(); 362 error = smb_sm_done(); 363 error = 0; 364 cdevsw_remove(&nsmb_cdevsw, 0, 0); 365 printf("netsmb_dev: unloaded\n"); 366 break; 367 default: 368 error = EINVAL; 369 break; 370 } 371 return error; 372 } 373 374 DEV_MODULE (dev_netsmb, nsmb_dev_load, 0); 375 376 377 /* 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 if (((u_int)fd) >= fdp->fd_nfiles || 386 (fp = fdp->fd_files[fd].fp) == NULL || 387 (fp->f_flag & flag) == 0) 388 return (NULL); 389 return (fp); 390 } 391 392 int 393 smb_dev2share(int fd, int mode, struct smb_cred *scred, 394 struct smb_share **sspp) 395 { 396 struct file *fp; 397 struct vnode *vp; 398 struct smb_dev *sdp; 399 struct smb_share *ssp; 400 dev_t dev; 401 int error; 402 403 KKASSERT(scred->scr_td->td_proc); 404 405 if ((fp = nsmb_getfp(scred->scr_td->td_proc->p_fd, 406 fd, FREAD | FWRITE)) == NULL) { 407 return EBADF; 408 } 409 vp = (struct vnode*)fp->f_data; 410 if (vp == NULL) 411 return EBADF; 412 dev = vn_todev(vp); 413 if (dev == NODEV) 414 return EBADF; 415 SMB_CHECKMINOR(dev); 416 ssp = sdp->sd_share; 417 if (ssp == NULL) 418 return ENOTCONN; 419 error = smb_share_get(ssp, LK_EXCLUSIVE, scred); 420 if (error) 421 return error; 422 *sspp = ssp; 423 return 0; 424 } 425 426