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
Version:
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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 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, struct ucred *cred, char *name, int namelen, 103 struct cdev **dev) 104 { 105 int u; 106 107 if (*dev != NULL) 108 return; 109 if (dev_stdclone(name, NULL, NSMB_NAME, &u) != 1) 110 return; 111 *dev = make_dev(&nsmb_cdevsw, unit2minor(u), 0, 0, 0600, 112 NSMB_NAME"%d", u); 113 dev_ref(*dev); 114 } 115 116 static int 117 nsmb_dev_open(struct cdev *dev, int oflags, int devtype, struct thread *td) 118 { 119 struct smb_dev *sdp; 120 struct ucred *cred = td->td_ucred; 121 int s; 122 123 sdp = SMB_GETDEV(dev); 124 if (sdp && (sdp->sd_flags & NSMBFL_OPEN)) 125 return EBUSY; 126 if (sdp == NULL) { 127 sdp = malloc(sizeof(*sdp), M_NSMBDEV, M_WAITOK); 128 dev->si_drv1 = (void*)sdp; 129 } 130 /* 131 * XXX: this is just crazy - make a device for an already passed device... 132 * someone should take care of it. 133 */ 134 if ((dev->si_flags & SI_NAMED) == 0) 135 make_dev(&nsmb_cdevsw, minor(dev), cred->cr_uid, cred->cr_gid, 0700, 136 NSMB_NAME"%d", dev2unit(dev)); 137 bzero(sdp, sizeof(*sdp)); 138 /* 139 STAILQ_INIT(&sdp->sd_rqlist); 140 STAILQ_INIT(&sdp->sd_rplist); 141 bzero(&sdp->sd_pollinfo, sizeof(struct selinfo)); 142 */ 143 s = splimp(); 144 sdp->sd_level = -1; 145 sdp->sd_flags |= NSMBFL_OPEN; 146 splx(s); 147 return 0; 148 } 149 150 static int 151 nsmb_dev_close(struct cdev *dev, int flag, int fmt, struct thread *td) 152 { 153 struct smb_dev *sdp; 154 struct smb_vc *vcp; 155 struct smb_share *ssp; 156 struct smb_cred scred; 157 int s; 158 159 SMB_CHECKMINOR(dev); 160 s = splimp(); 161 if ((sdp->sd_flags & NSMBFL_OPEN) == 0) { 162 splx(s); 163 return EBADF; 164 } 165 smb_makescred(&scred, td, NULL); 166 ssp = sdp->sd_share; 167 if (ssp != NULL) 168 smb_share_rele(ssp, &scred); 169 vcp = sdp->sd_vc; 170 if (vcp != NULL) 171 smb_vc_rele(vcp, &scred); 172 /* 173 smb_flushq(&sdp->sd_rqlist); 174 smb_flushq(&sdp->sd_rplist); 175 */ 176 dev->si_drv1 = NULL; 177 free(sdp, M_NSMBDEV); 178 destroy_dev_sched(dev); 179 splx(s); 180 return 0; 181 } 182 183 184 static int 185 nsmb_dev_ioctl(struct cdev *dev, u_long cmd, caddr_t data, int flag, struct thread *td) 186 { 187 struct smb_dev *sdp; 188 struct smb_vc *vcp; 189 struct smb_share *ssp; 190 struct smb_cred scred; 191 int error = 0; 192 193 SMB_CHECKMINOR(dev); 194 if ((sdp->sd_flags & NSMBFL_OPEN) == 0) 195 return EBADF; 196 197 smb_makescred(&scred, td, NULL); 198 switch (cmd) { 199 case SMBIOC_OPENSESSION: 200 if (sdp->sd_vc) 201 return EISCONN; 202 error = smb_usr_opensession((struct smbioc_ossn*)data, 203 &scred, &vcp); 204 if (error) 205 break; 206 sdp->sd_vc = vcp; 207 smb_vc_unlock(vcp, 0, td); 208 sdp->sd_level = SMBL_VC; 209 break; 210 case SMBIOC_OPENSHARE: 211 if (sdp->sd_share) 212 return EISCONN; 213 if (sdp->sd_vc == NULL) 214 return ENOTCONN; 215 error = smb_usr_openshare(sdp->sd_vc, 216 (struct smbioc_oshare*)data, &scred, &ssp); 217 if (error) 218 break; 219 sdp->sd_share = ssp; 220 smb_share_unlock(ssp, 0, td); 221 sdp->sd_level = SMBL_SHARE; 222 break; 223 case SMBIOC_REQUEST: 224 if (sdp->sd_share == NULL) 225 return ENOTCONN; 226 error = smb_usr_simplerequest(sdp->sd_share, 227 (struct smbioc_rq*)data, &scred); 228 break; 229 case SMBIOC_T2RQ: 230 if (sdp->sd_share == NULL) 231 return ENOTCONN; 232 error = smb_usr_t2request(sdp->sd_share, 233 (struct smbioc_t2rq*)data, &scred); 234 break; 235 case SMBIOC_SETFLAGS: { 236 struct smbioc_flags *fl = (struct smbioc_flags*)data; 237 int on; 238 239 if (fl->ioc_level == SMBL_VC) { 240 if (fl->ioc_mask & SMBV_PERMANENT) { 241 on = fl->ioc_flags & SMBV_PERMANENT; 242 if ((vcp = sdp->sd_vc) == NULL) 243 return ENOTCONN; 244 error = smb_vc_get(vcp, LK_EXCLUSIVE, &scred); 245 if (error) 246 break; 247 if (on && (vcp->obj.co_flags & SMBV_PERMANENT) == 0) { 248 vcp->obj.co_flags |= SMBV_PERMANENT; 249 smb_vc_ref(vcp); 250 } else if (!on && (vcp->obj.co_flags & SMBV_PERMANENT)) { 251 vcp->obj.co_flags &= ~SMBV_PERMANENT; 252 smb_vc_rele(vcp, &scred); 253 } 254 smb_vc_put(vcp, &scred); 255 } else 256 error = EINVAL; 257 } else if (fl->ioc_level == SMBL_SHARE) { 258 if (fl->ioc_mask & SMBS_PERMANENT) { 259 on = fl->ioc_flags & SMBS_PERMANENT; 260 if ((ssp = sdp->sd_share) == NULL) 261 return ENOTCONN; 262 error = smb_share_get(ssp, LK_EXCLUSIVE, &scred); 263 if (error) 264 break; 265 if (on && (ssp->obj.co_flags & SMBS_PERMANENT) == 0) { 266 ssp->obj.co_flags |= SMBS_PERMANENT; 267 smb_share_ref(ssp); 268 } else if (!on && (ssp->obj.co_flags & SMBS_PERMANENT)) { 269 ssp->obj.co_flags &= ~SMBS_PERMANENT; 270 smb_share_rele(ssp, &scred); 271 } 272 smb_share_put(ssp, &scred); 273 } else 274 error = EINVAL; 275 break; 276 } else 277 error = EINVAL; 278 break; 279 } 280 case SMBIOC_LOOKUP: 281 if (sdp->sd_vc || sdp->sd_share) 282 return EISCONN; 283 vcp = NULL; 284 ssp = NULL; 285 error = smb_usr_lookup((struct smbioc_lookup*)data, &scred, &vcp, &ssp); 286 if (error) 287 break; 288 if (vcp) { 289 sdp->sd_vc = vcp; 290 smb_vc_unlock(vcp, 0, td); 291 sdp->sd_level = SMBL_VC; 292 } 293 if (ssp) { 294 sdp->sd_share = ssp; 295 smb_share_unlock(ssp, 0, td); 296 sdp->sd_level = SMBL_SHARE; 297 } 298 break; 299 case SMBIOC_READ: case SMBIOC_WRITE: { 300 struct smbioc_rw *rwrq = (struct smbioc_rw*)data; 301 struct uio auio; 302 struct iovec iov; 303 304 if ((ssp = sdp->sd_share) == NULL) 305 return ENOTCONN; 306 iov.iov_base = rwrq->ioc_base; 307 iov.iov_len = rwrq->ioc_cnt; 308 auio.uio_iov = &iov; 309 auio.uio_iovcnt = 1; 310 auio.uio_offset = rwrq->ioc_offset; 311 auio.uio_resid = rwrq->ioc_cnt; 312 auio.uio_segflg = UIO_USERSPACE; 313 auio.uio_rw = (cmd == SMBIOC_READ) ? UIO_READ : UIO_WRITE; 314 auio.uio_td = td; 315 if (cmd == SMBIOC_READ) 316 error = smb_read(ssp, rwrq->ioc_fh, &auio, &scred); 317 else 318 error = smb_write(ssp, rwrq->ioc_fh, &auio, &scred); 319 rwrq->ioc_cnt -= auio.uio_resid; 320 break; 321 } 322 default: 323 error = ENODEV; 324 } 325 return error; 326 } 327 328 static int 329 nsmb_dev_load(module_t mod, int cmd, void *arg) 330 { 331 int error = 0; 332 333 switch (cmd) { 334 case MOD_LOAD: 335 error = smb_sm_init(); 336 if (error) 337 break; 338 error = smb_iod_init(); 339 if (error) { 340 smb_sm_done(); 341 break; 342 } 343 nsmb_dev_tag = EVENTHANDLER_REGISTER(dev_clone, nsmb_dev_clone, 0, 1000); 344 printf("netsmb_dev: loaded\n"); 345 break; 346 case MOD_UNLOAD: 347 smb_iod_done(); 348 error = smb_sm_done(); 349 if (error) 350 break; 351 EVENTHANDLER_DEREGISTER(dev_clone, nsmb_dev_tag); 352 drain_dev_clone_events(); 353 destroy_dev_drain(&nsmb_cdevsw); 354 printf("netsmb_dev: unloaded\n"); 355 break; 356 default: 357 error = EINVAL; 358 break; 359 } 360 return error; 361 } 362 363 DEV_MODULE (dev_netsmb, nsmb_dev_load, 0); 364 365 /* 366 * Convert a file descriptor to appropriate smb_share pointer 367 */ 368 static struct file* 369 nsmb_getfp(struct filedesc* fdp, int fd, int flag) 370 { 371 struct file* fp; 372 373 FILEDESC_SLOCK(fdp); 374 if (((u_int)fd) >= fdp->fd_nfiles || 375 (fp = fdp->fd_ofiles[fd]) == NULL || 376 (fp->f_flag & flag) == 0) { 377 FILEDESC_SUNLOCK(fdp); 378 return (NULL); 379 } 380 fhold(fp); 381 FILEDESC_SUNLOCK(fdp); 382 return (fp); 383 } 384 385 int 386 smb_dev2share(int fd, int mode, struct smb_cred *scred, 387 struct smb_share **sspp) 388 { 389 struct file *fp; 390 struct vnode *vp; 391 struct smb_dev *sdp; 392 struct smb_share *ssp; 393 struct cdev *dev; 394 int error; 395 396 fp = nsmb_getfp(scred->scr_td->td_proc->p_fd, fd, FREAD | FWRITE); 397 if (fp == NULL) 398 return EBADF; 399 vp = fp->f_vnode; 400 if (vp == NULL) { 401 fdrop(fp, curthread); 402 return EBADF; 403 } 404 if (vp->v_type != VCHR) { 405 fdrop(fp, curthread); 406 return EBADF; 407 } 408 dev = vp->v_rdev; 409 SMB_CHECKMINOR(dev); 410 ssp = sdp->sd_share; 411 if (ssp == NULL) { 412 fdrop(fp, curthread); 413 return ENOTCONN; 414 } 415 error = smb_share_get(ssp, LK_EXCLUSIVE, scred); 416 if (error == 0) 417 *sspp = ssp; 418 fdrop(fp, curthread); 419 return error; 420 } 421
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