| 1 | /* $NetBSD: smb_dev.c,v 1.49 2016/07/18 21:03:01 pgoyette Exp $ */ |
| 2 | |
| 3 | /* |
| 4 | * Copyright (c) 2000-2001 Boris Popov |
| 5 | * All rights reserved. |
| 6 | * |
| 7 | * Redistribution and use in source and binary forms, with or without |
| 8 | * modification, are permitted provided that the following conditions |
| 9 | * are met: |
| 10 | * 1. Redistributions of source code must retain the above copyright |
| 11 | * notice, this list of conditions and the following disclaimer. |
| 12 | * 2. Redistributions in binary form must reproduce the above copyright |
| 13 | * notice, this list of conditions and the following disclaimer in the |
| 14 | * documentation and/or other materials provided with the distribution. |
| 15 | * 3. All advertising materials mentioning features or use of this software |
| 16 | * must display the following acknowledgement: |
| 17 | * This product includes software developed by Boris Popov. |
| 18 | * 4. Neither the name of the author nor the names of any co-contributors |
| 19 | * may be used to endorse or promote products derived from this software |
| 20 | * without specific prior written permission. |
| 21 | * |
| 22 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND |
| 23 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 24 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| 25 | * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE |
| 26 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| 27 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| 28 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| 29 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| 30 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| 31 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| 32 | * SUCH DAMAGE. |
| 33 | * |
| 34 | * FreeBSD: src/sys/netsmb/smb_dev.c,v 1.4 2001/12/02 08:47:29 bp Exp |
| 35 | */ |
| 36 | |
| 37 | #include <sys/cdefs.h> |
| 38 | __KERNEL_RCSID(0, "$NetBSD: smb_dev.c,v 1.49 2016/07/18 21:03:01 pgoyette Exp $" ); |
| 39 | |
| 40 | #include <sys/param.h> |
| 41 | #include <sys/kernel.h> |
| 42 | #include <sys/systm.h> |
| 43 | #include <sys/conf.h> |
| 44 | #include <sys/fcntl.h> |
| 45 | #include <sys/filedesc.h> |
| 46 | #include <sys/ioccom.h> |
| 47 | #include <sys/lock.h> |
| 48 | #include <sys/malloc.h> |
| 49 | #include <sys/file.h> /* Must come after sys/malloc.h */ |
| 50 | #include <sys/module.h> |
| 51 | #include <sys/mbuf.h> |
| 52 | #include <sys/poll.h> |
| 53 | #include <sys/proc.h> |
| 54 | #include <sys/select.h> |
| 55 | #include <sys/socket.h> |
| 56 | #include <sys/socketvar.h> |
| 57 | #include <sys/sysctl.h> |
| 58 | #include <sys/uio.h> |
| 59 | #include <sys/vnode.h> |
| 60 | |
| 61 | #include <miscfs/specfs/specdev.h> /* XXX */ |
| 62 | |
| 63 | #include <net/if.h> |
| 64 | |
| 65 | #include <netsmb/smb.h> |
| 66 | #include <netsmb/smb_conn.h> |
| 67 | #include <netsmb/smb_subr.h> |
| 68 | #include <netsmb/smb_dev.h> |
| 69 | #include <netsmb/smb_rq.h> |
| 70 | |
| 71 | #include "ioconf.h" |
| 72 | |
| 73 | static struct smb_dev **smb_devtbl; /* indexed by minor */ |
| 74 | #define SMB_GETDEV(dev) (smb_devtbl[minor(dev)]) |
| 75 | #define NSMB_DEFNUM 4 |
| 76 | |
| 77 | |
| 78 | MALLOC_DEFINE(M_NSMBDEV, "NETSMBDEV" , "NET/SMB device" ); |
| 79 | |
| 80 | |
| 81 | /* |
| 82 | int smb_dev_queue(struct smb_dev *ndp, struct smb_rq *rqp, int prio); |
| 83 | */ |
| 84 | |
| 85 | dev_type_open(nsmb_dev_open); |
| 86 | dev_type_close(nsmb_dev_close); |
| 87 | dev_type_ioctl(nsmb_dev_ioctl); |
| 88 | |
| 89 | const struct cdevsw nsmb_cdevsw = { |
| 90 | .d_open = nsmb_dev_open, |
| 91 | .d_close = nsmb_dev_close, |
| 92 | .d_read = noread, |
| 93 | .d_write = nowrite, |
| 94 | .d_ioctl = nsmb_dev_ioctl, |
| 95 | .d_stop = nostop, |
| 96 | .d_tty = notty, |
| 97 | .d_poll = nopoll, |
| 98 | .d_mmap = nommap, |
| 99 | .d_kqfilter = nokqfilter, |
| 100 | .d_discard = nodiscard, |
| 101 | .d_flag = D_OTHER, |
| 102 | }; |
| 103 | |
| 104 | |
| 105 | static bool nsmb_inited = false; |
| 106 | |
| 107 | void |
| 108 | nsmbattach(int num) |
| 109 | { |
| 110 | |
| 111 | if (nsmb_inited) |
| 112 | return; |
| 113 | nsmb_inited = true; |
| 114 | |
| 115 | if (num <= 0) { |
| 116 | #ifdef DIAGNOSTIC |
| 117 | panic("nsmbattach: count <= 0" ); |
| 118 | #endif |
| 119 | return; |
| 120 | } |
| 121 | |
| 122 | if (num == 1) |
| 123 | num = NSMB_DEFNUM; |
| 124 | |
| 125 | smb_devtbl = malloc(num * sizeof(void *), M_NSMBDEV, M_WAITOK|M_ZERO); |
| 126 | |
| 127 | if (smb_sm_init()) { |
| 128 | #ifdef DIAGNOSTIC |
| 129 | panic("netsmbattach: smb_sm_init failed" ); |
| 130 | #endif |
| 131 | return; |
| 132 | } |
| 133 | |
| 134 | if (smb_iod_init()) { |
| 135 | #ifdef DIAGNOSTIC |
| 136 | panic("netsmbattach: smb_iod_init failed" ); |
| 137 | #endif |
| 138 | smb_sm_done(); |
| 139 | return; |
| 140 | } |
| 141 | smb_rqpool_init(); |
| 142 | } |
| 143 | |
| 144 | static void |
| 145 | nsmbdetach(void) |
| 146 | { |
| 147 | |
| 148 | smb_iod_done(); |
| 149 | smb_sm_done(); |
| 150 | smb_rqpool_fini(); |
| 151 | free(smb_devtbl, M_NSMBDEV); |
| 152 | nsmb_inited = false; |
| 153 | } |
| 154 | |
| 155 | int |
| 156 | nsmb_dev_open(dev_t dev, int oflags, int devtype, |
| 157 | struct lwp *l) |
| 158 | { |
| 159 | struct smb_dev *sdp; |
| 160 | int s; |
| 161 | |
| 162 | sdp = SMB_GETDEV(dev); |
| 163 | if (sdp && (sdp->sd_flags & NSMBFL_OPEN)) |
| 164 | return EBUSY; |
| 165 | if (sdp == NULL) { |
| 166 | sdp = malloc(sizeof(*sdp), M_NSMBDEV, M_WAITOK); |
| 167 | smb_devtbl[minor(dev)] = (void*)sdp; |
| 168 | } |
| 169 | |
| 170 | |
| 171 | memset(sdp, 0, sizeof(*sdp)); |
| 172 | /* |
| 173 | STAILQ_INIT(&sdp->sd_rqlist); |
| 174 | STAILQ_INIT(&sdp->sd_rplist); |
| 175 | selinit(&sdp->sd_pollinfo); |
| 176 | */ |
| 177 | s = splnet(); |
| 178 | sdp->sd_level = -1; |
| 179 | sdp->sd_flags |= NSMBFL_OPEN; |
| 180 | splx(s); |
| 181 | return 0; |
| 182 | } |
| 183 | |
| 184 | int |
| 185 | nsmb_dev_close(dev_t dev, int flag, int fmt, struct lwp *l) |
| 186 | { |
| 187 | struct smb_dev *sdp; |
| 188 | struct smb_vc *vcp; |
| 189 | struct smb_share *ssp; |
| 190 | struct smb_cred scred; |
| 191 | int s; |
| 192 | |
| 193 | sdp = SMB_GETDEV(dev); |
| 194 | if (!sdp) |
| 195 | return (ENXIO); |
| 196 | |
| 197 | s = splnet(); |
| 198 | if ((sdp->sd_flags & NSMBFL_OPEN) == 0) { |
| 199 | splx(s); |
| 200 | return EBADF; |
| 201 | } |
| 202 | smb_makescred(&scred, l, NULL); |
| 203 | ssp = sdp->sd_share; |
| 204 | if (ssp != NULL) { |
| 205 | smb_share_lock(ssp); |
| 206 | smb_share_rele(ssp, &scred); |
| 207 | } |
| 208 | vcp = sdp->sd_vc; |
| 209 | if (vcp != NULL) { |
| 210 | smb_vc_lock(vcp); |
| 211 | smb_vc_rele(vcp, &scred); |
| 212 | } |
| 213 | /* |
| 214 | smb_flushq(&sdp->sd_rqlist); |
| 215 | smb_flushq(&sdp->sd_rplist); |
| 216 | seldestroy(&sdp->sd_pollinfo); |
| 217 | */ |
| 218 | smb_devtbl[minor(dev)] = NULL; |
| 219 | free(sdp, M_NSMBDEV); |
| 220 | splx(s); |
| 221 | return 0; |
| 222 | } |
| 223 | |
| 224 | |
| 225 | int |
| 226 | nsmb_dev_ioctl(dev_t dev, u_long cmd, void *data, int flag, |
| 227 | struct lwp *l) |
| 228 | { |
| 229 | struct smb_dev *sdp; |
| 230 | struct smb_vc *vcp; |
| 231 | struct smb_share *ssp; |
| 232 | struct smb_cred scred; |
| 233 | int error = 0; |
| 234 | |
| 235 | sdp = SMB_GETDEV(dev); |
| 236 | if (!sdp) |
| 237 | return (ENXIO); |
| 238 | if ((sdp->sd_flags & NSMBFL_OPEN) == 0) |
| 239 | return EBADF; |
| 240 | |
| 241 | smb_makescred(&scred, l, NULL); |
| 242 | switch (cmd) { |
| 243 | case SMBIOC_OPENSESSION: |
| 244 | if (sdp->sd_vc) |
| 245 | return EISCONN; |
| 246 | error = smb_usr_opensession((struct smbioc_ossn*)data, |
| 247 | &scred, &vcp); |
| 248 | if (error) |
| 249 | break; |
| 250 | sdp->sd_vc = vcp; |
| 251 | smb_vc_unlock(vcp); |
| 252 | sdp->sd_level = SMBL_VC; |
| 253 | break; |
| 254 | case SMBIOC_OPENSHARE: |
| 255 | if (sdp->sd_share) |
| 256 | return EISCONN; |
| 257 | if (sdp->sd_vc == NULL) |
| 258 | return ENOTCONN; |
| 259 | error = smb_usr_openshare(sdp->sd_vc, |
| 260 | (struct smbioc_oshare*)data, &scred, &ssp); |
| 261 | if (error) |
| 262 | break; |
| 263 | sdp->sd_share = ssp; |
| 264 | smb_share_unlock(ssp); |
| 265 | sdp->sd_level = SMBL_SHARE; |
| 266 | break; |
| 267 | case SMBIOC_REQUEST: |
| 268 | if (sdp->sd_share == NULL) |
| 269 | return ENOTCONN; |
| 270 | error = smb_usr_simplerequest(sdp->sd_share, |
| 271 | (struct smbioc_rq*)data, &scred); |
| 272 | break; |
| 273 | case SMBIOC_T2RQ: |
| 274 | if (sdp->sd_share == NULL) |
| 275 | return ENOTCONN; |
| 276 | error = smb_usr_t2request(sdp->sd_share, |
| 277 | (struct smbioc_t2rq*)data, &scred); |
| 278 | break; |
| 279 | case SMBIOC_SETFLAGS: { |
| 280 | struct smbioc_flags *fl = (struct smbioc_flags*)data; |
| 281 | int on; |
| 282 | |
| 283 | if (fl->ioc_level == SMBL_VC) { |
| 284 | if (fl->ioc_mask & SMBV_PERMANENT) { |
| 285 | on = fl->ioc_flags & SMBV_PERMANENT; |
| 286 | if ((vcp = sdp->sd_vc) == NULL) |
| 287 | return ENOTCONN; |
| 288 | error = smb_vc_get(vcp, &scred); |
| 289 | if (error) |
| 290 | break; |
| 291 | if (on && (vcp->obj.co_flags & SMBV_PERMANENT) == 0) { |
| 292 | vcp->obj.co_flags |= SMBV_PERMANENT; |
| 293 | smb_vc_ref(vcp); |
| 294 | } else if (!on && (vcp->obj.co_flags & SMBV_PERMANENT)) { |
| 295 | vcp->obj.co_flags &= ~SMBV_PERMANENT; |
| 296 | smb_vc_rele(vcp, &scred); |
| 297 | } |
| 298 | smb_vc_put(vcp, &scred); |
| 299 | } else |
| 300 | error = EINVAL; |
| 301 | } else if (fl->ioc_level == SMBL_SHARE) { |
| 302 | if (fl->ioc_mask & SMBS_PERMANENT) { |
| 303 | on = fl->ioc_flags & SMBS_PERMANENT; |
| 304 | if ((ssp = sdp->sd_share) == NULL) |
| 305 | return ENOTCONN; |
| 306 | error = smb_share_get(ssp, &scred); |
| 307 | if (error) |
| 308 | break; |
| 309 | if (on && (ssp->obj.co_flags & SMBS_PERMANENT) == 0) { |
| 310 | ssp->obj.co_flags |= SMBS_PERMANENT; |
| 311 | smb_share_ref(ssp); |
| 312 | } else if (!on && (ssp->obj.co_flags & SMBS_PERMANENT)) { |
| 313 | ssp->obj.co_flags &= ~SMBS_PERMANENT; |
| 314 | smb_share_rele(ssp, &scred); |
| 315 | } |
| 316 | smb_share_put(ssp, &scred); |
| 317 | } else |
| 318 | error = EINVAL; |
| 319 | break; |
| 320 | } else |
| 321 | error = EINVAL; |
| 322 | break; |
| 323 | } |
| 324 | case SMBIOC_LOOKUP: |
| 325 | if (sdp->sd_vc || sdp->sd_share) |
| 326 | return EISCONN; |
| 327 | vcp = NULL; |
| 328 | ssp = NULL; |
| 329 | error = smb_usr_lookup((struct smbioc_lookup*)data, &scred, &vcp, &ssp); |
| 330 | if (error) |
| 331 | break; |
| 332 | if (vcp) { |
| 333 | sdp->sd_vc = vcp; |
| 334 | smb_vc_unlock(vcp); |
| 335 | sdp->sd_level = SMBL_VC; |
| 336 | } |
| 337 | if (ssp) { |
| 338 | sdp->sd_share = ssp; |
| 339 | smb_share_unlock(ssp); |
| 340 | sdp->sd_level = SMBL_SHARE; |
| 341 | } |
| 342 | break; |
| 343 | case SMBIOC_READ: case SMBIOC_WRITE: { |
| 344 | struct smbioc_rw *rwrq = (struct smbioc_rw*)data; |
| 345 | struct uio auio; |
| 346 | struct iovec iov; |
| 347 | |
| 348 | if ((ssp = sdp->sd_share) == NULL) |
| 349 | return ENOTCONN; |
| 350 | iov.iov_base = rwrq->ioc_base; |
| 351 | iov.iov_len = rwrq->ioc_cnt; |
| 352 | auio.uio_iov = &iov; |
| 353 | auio.uio_iovcnt = 1; |
| 354 | auio.uio_offset = rwrq->ioc_offset; |
| 355 | auio.uio_resid = rwrq->ioc_cnt; |
| 356 | auio.uio_rw = (cmd == SMBIOC_READ) ? UIO_READ : UIO_WRITE; |
| 357 | auio.uio_vmspace = l->l_proc->p_vmspace; |
| 358 | if (cmd == SMBIOC_READ) |
| 359 | error = smb_read(ssp, rwrq->ioc_fh, &auio, &scred); |
| 360 | else |
| 361 | error = smb_write(ssp, rwrq->ioc_fh, &auio, &scred); |
| 362 | rwrq->ioc_cnt -= auio.uio_resid; |
| 363 | break; |
| 364 | } |
| 365 | default: |
| 366 | error = ENODEV; |
| 367 | } |
| 368 | return error; |
| 369 | } |
| 370 | |
| 371 | MODULE(MODULE_CLASS_DRIVER, nsmb, NULL); |
| 372 | static int |
| 373 | nsmb_modcmd(modcmd_t cmd, void *arg) |
| 374 | { |
| 375 | #ifdef _MODULE |
| 376 | devmajor_t cmajor = NODEVMAJOR, bmajor = NODEVMAJOR; |
| 377 | #endif |
| 378 | int error = 0; |
| 379 | |
| 380 | switch (cmd) { |
| 381 | case MODULE_CMD_INIT: |
| 382 | nsmbattach(1); |
| 383 | #ifdef _MODULE |
| 384 | error = |
| 385 | devsw_attach("nsmb" , NULL, &bmajor, &nsmb_cdevsw, &cmajor); |
| 386 | if (error) { |
| 387 | nsmbdetach(); |
| 388 | } |
| 389 | #endif |
| 390 | |
| 391 | break; |
| 392 | case MODULE_CMD_FINI: |
| 393 | #ifdef _MODULE |
| 394 | error = devsw_detach(NULL, &nsmb_cdevsw); |
| 395 | if (error) |
| 396 | break; |
| 397 | #endif |
| 398 | nsmbdetach(); |
| 399 | break; |
| 400 | default: |
| 401 | error = ENOTTY; |
| 402 | break; |
| 403 | } |
| 404 | |
| 405 | return error; |
| 406 | } |
| 407 | |
| 408 | /* |
| 409 | * Convert a file descriptor to appropriate smb_share pointer |
| 410 | */ |
| 411 | int |
| 412 | smb_dev2share(int fd, int mode, struct smb_cred *scred, |
| 413 | struct smb_share **sspp) |
| 414 | { |
| 415 | file_t *fp; |
| 416 | struct vnode *vp; |
| 417 | struct smb_dev *sdp; |
| 418 | struct smb_share *ssp; |
| 419 | dev_t dev; |
| 420 | int error; |
| 421 | |
| 422 | if ((fp = fd_getfile(fd)) == NULL) |
| 423 | return (EBADF); |
| 424 | |
| 425 | vp = fp->f_vnode; |
| 426 | if (fp->f_type != DTYPE_VNODE |
| 427 | || (fp->f_flag & (FREAD|FWRITE)) == 0 |
| 428 | || vp->v_type != VCHR |
| 429 | || vp->v_rdev == NODEV) { |
| 430 | fd_putfile(fd); |
| 431 | return (EBADF); |
| 432 | } |
| 433 | |
| 434 | dev = vp->v_rdev; |
| 435 | |
| 436 | fd_putfile(fd); |
| 437 | |
| 438 | sdp = SMB_GETDEV(dev); |
| 439 | if (!sdp) |
| 440 | return (ENXIO); |
| 441 | ssp = sdp->sd_share; |
| 442 | if (ssp == NULL) |
| 443 | return ENOTCONN; |
| 444 | |
| 445 | error = smb_share_get(ssp, scred); |
| 446 | if (error) |
| 447 | return error; |
| 448 | |
| 449 | *sspp = ssp; |
| 450 | return 0; |
| 451 | } |
| 452 | |