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: releng/5.3/sys/netsmb/smb_dev.c 130640 2004-06-17 17:16:53Z phk $"); 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 } 113 114 static int 115 nsmb_dev_open(struct cdev *dev, int oflags, int devtype, struct thread *td) 116 { 117 struct smb_dev *sdp; 118 struct ucred *cred = td->td_ucred; 119 int s; 120 121 sdp = SMB_GETDEV(dev); 122 if (sdp && (sdp->sd_flags & NSMBFL_OPEN)) 123 return EBUSY; 124 if (sdp == NULL) { 125 sdp = malloc(sizeof(*sdp), M_NSMBDEV, M_WAITOK); 126 dev->si_drv1 = (void*)sdp; 127 } 128 /* 129 * XXX: this is just crazy - make a device for an already passed device... 130 * someone should take care of it. 131 */ 132 if ((dev->si_flags & SI_NAMED) == 0) 133 make_dev(&nsmb_cdevsw, minor(dev), cred->cr_uid, cred->cr_gid, 0700, 134 NSMB_NAME"%d", dev2unit(dev)); 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 s = splimp(); 142 sdp->sd_level = -1; 143 sdp->sd_flags |= NSMBFL_OPEN; 144 splx(s); 145 return 0; 146 } 147 148 static int 149 nsmb_dev_close(struct cdev *dev, int flag, int fmt, struct thread *td) 150 { 151 struct smb_dev *sdp; 152 struct smb_vc *vcp; 153 struct smb_share *ssp; 154 struct smb_cred scred; 155 int s; 156 157 SMB_CHECKMINOR(dev); 158 s = splimp(); 159 if ((sdp->sd_flags & NSMBFL_OPEN) == 0) { 160 splx(s); 161 return EBADF; 162 } 163 smb_makescred(&scred, td, NULL); 164 ssp = sdp->sd_share; 165 if (ssp != NULL) 166 smb_share_rele(ssp, &scred); 167 vcp = sdp->sd_vc; 168 if (vcp != NULL) 169 smb_vc_rele(vcp, &scred); 170 /* 171 smb_flushq(&sdp->sd_rqlist); 172 smb_flushq(&sdp->sd_rplist); 173 */ 174 dev->si_drv1 = NULL; 175 free(sdp, M_NSMBDEV); 176 destroy_dev(dev); 177 splx(s); 178 return 0; 179 } 180 181 182 static int 183 nsmb_dev_ioctl(struct cdev *dev, u_long cmd, caddr_t data, int flag, struct thread *td) 184 { 185 struct smb_dev *sdp; 186 struct smb_vc *vcp; 187 struct smb_share *ssp; 188 struct smb_cred scred; 189 int error = 0; 190 191 SMB_CHECKMINOR(dev); 192 if ((sdp->sd_flags & NSMBFL_OPEN) == 0) 193 return EBADF; 194 195 smb_makescred(&scred, td, NULL); 196 switch (cmd) { 197 case SMBIOC_OPENSESSION: 198 if (sdp->sd_vc) 199 return EISCONN; 200 error = smb_usr_opensession((struct smbioc_ossn*)data, 201 &scred, &vcp); 202 if (error) 203 break; 204 sdp->sd_vc = vcp; 205 smb_vc_unlock(vcp, 0, td); 206 sdp->sd_level = SMBL_VC; 207 break; 208 case SMBIOC_OPENSHARE: 209 if (sdp->sd_share) 210 return EISCONN; 211 if (sdp->sd_vc == NULL) 212 return ENOTCONN; 213 error = smb_usr_openshare(sdp->sd_vc, 214 (struct smbioc_oshare*)data, &scred, &ssp); 215 if (error) 216 break; 217 sdp->sd_share = ssp; 218 smb_share_unlock(ssp, 0, td); 219 sdp->sd_level = SMBL_SHARE; 220 break; 221 case SMBIOC_REQUEST: 222 if (sdp->sd_share == NULL) 223 return ENOTCONN; 224 error = smb_usr_simplerequest(sdp->sd_share, 225 (struct smbioc_rq*)data, &scred); 226 break; 227 case SMBIOC_T2RQ: 228 if (sdp->sd_share == NULL) 229 return ENOTCONN; 230 error = smb_usr_t2request(sdp->sd_share, 231 (struct smbioc_t2rq*)data, &scred); 232 break; 233 case SMBIOC_SETFLAGS: { 234 struct smbioc_flags *fl = (struct smbioc_flags*)data; 235 int on; 236 237 if (fl->ioc_level == SMBL_VC) { 238 if (fl->ioc_mask & SMBV_PERMANENT) { 239 on = fl->ioc_flags & SMBV_PERMANENT; 240 if ((vcp = sdp->sd_vc) == NULL) 241 return ENOTCONN; 242 error = smb_vc_get(vcp, LK_EXCLUSIVE, &scred); 243 if (error) 244 break; 245 if (on && (vcp->obj.co_flags & SMBV_PERMANENT) == 0) { 246 vcp->obj.co_flags |= SMBV_PERMANENT; 247 smb_vc_ref(vcp); 248 } else if (!on && (vcp->obj.co_flags & SMBV_PERMANENT)) { 249 vcp->obj.co_flags &= ~SMBV_PERMANENT; 250 smb_vc_rele(vcp, &scred); 251 } 252 smb_vc_put(vcp, &scred); 253 } else 254 error = EINVAL; 255 } else if (fl->ioc_level == SMBL_SHARE) { 256 if (fl->ioc_mask & SMBS_PERMANENT) { 257 on = fl->ioc_flags & SMBS_PERMANENT; 258 if ((ssp = sdp->sd_share) == NULL) 259 return ENOTCONN; 260 error = smb_share_get(ssp, LK_EXCLUSIVE, &scred); 261 if (error) 262 break; 263 if (on && (ssp->obj.co_flags & SMBS_PERMANENT) == 0) { 264 ssp->obj.co_flags |= SMBS_PERMANENT; 265 smb_share_ref(ssp); 266 } else if (!on && (ssp->obj.co_flags & SMBS_PERMANENT)) { 267 ssp->obj.co_flags &= ~SMBS_PERMANENT; 268 smb_share_rele(ssp, &scred); 269 } 270 smb_share_put(ssp, &scred); 271 } else 272 error = EINVAL; 273 break; 274 } else 275 error = EINVAL; 276 break; 277 } 278 case SMBIOC_LOOKUP: 279 if (sdp->sd_vc || sdp->sd_share) 280 return EISCONN; 281 vcp = NULL; 282 ssp = NULL; 283 error = smb_usr_lookup((struct smbioc_lookup*)data, &scred, &vcp, &ssp); 284 if (error) 285 break; 286 if (vcp) { 287 sdp->sd_vc = vcp; 288 smb_vc_unlock(vcp, 0, td); 289 sdp->sd_level = SMBL_VC; 290 } 291 if (ssp) { 292 sdp->sd_share = ssp; 293 smb_share_unlock(ssp, 0, td); 294 sdp->sd_level = SMBL_SHARE; 295 } 296 break; 297 case SMBIOC_READ: case SMBIOC_WRITE: { 298 struct smbioc_rw *rwrq = (struct smbioc_rw*)data; 299 struct uio auio; 300 struct iovec iov; 301 302 if ((ssp = sdp->sd_share) == NULL) 303 return ENOTCONN; 304 iov.iov_base = rwrq->ioc_base; 305 iov.iov_len = rwrq->ioc_cnt; 306 auio.uio_iov = &iov; 307 auio.uio_iovcnt = 1; 308 auio.uio_offset = rwrq->ioc_offset; 309 auio.uio_resid = rwrq->ioc_cnt; 310 auio.uio_segflg = UIO_USERSPACE; 311 auio.uio_rw = (cmd == SMBIOC_READ) ? UIO_READ : UIO_WRITE; 312 auio.uio_td = td; 313 if (cmd == SMBIOC_READ) 314 error = smb_read(ssp, rwrq->ioc_fh, &auio, &scred); 315 else 316 error = smb_write(ssp, rwrq->ioc_fh, &auio, &scred); 317 rwrq->ioc_cnt -= auio.uio_resid; 318 break; 319 } 320 default: 321 error = ENODEV; 322 } 323 return error; 324 } 325 326 static int 327 nsmb_dev_load(module_t mod, int cmd, void *arg) 328 { 329 int error = 0; 330 331 switch (cmd) { 332 case MOD_LOAD: 333 error = smb_sm_init(); 334 if (error) 335 break; 336 error = smb_iod_init(); 337 if (error) { 338 smb_sm_done(); 339 break; 340 } 341 nsmb_dev_tag = EVENTHANDLER_REGISTER(dev_clone, nsmb_dev_clone, 0, 1000); 342 printf("netsmb_dev: loaded\n"); 343 break; 344 case MOD_UNLOAD: 345 smb_iod_done(); 346 error = smb_sm_done(); 347 error = 0; 348 EVENTHANDLER_DEREGISTER(dev_clone, nsmb_dev_tag); 349 printf("netsmb_dev: unloaded\n"); 350 break; 351 default: 352 error = EINVAL; 353 break; 354 } 355 return error; 356 } 357 358 DEV_MODULE (dev_netsmb, nsmb_dev_load, 0); 359 360 /* 361 * Convert a file descriptor to appropriate smb_share pointer 362 */ 363 static struct file* 364 nsmb_getfp(struct filedesc* fdp, int fd, int flag) 365 { 366 struct file* fp; 367 368 FILEDESC_LOCK(fdp); 369 if (((u_int)fd) >= fdp->fd_nfiles || 370 (fp = fdp->fd_ofiles[fd]) == NULL || 371 (fp->f_flag & flag) == 0) { 372 FILEDESC_UNLOCK(fdp); 373 return (NULL); 374 } 375 fhold(fp); 376 FILEDESC_UNLOCK(fdp); 377 return (fp); 378 } 379 380 int 381 smb_dev2share(int fd, int mode, struct smb_cred *scred, 382 struct smb_share **sspp) 383 { 384 struct file *fp; 385 struct vnode *vp; 386 struct smb_dev *sdp; 387 struct smb_share *ssp; 388 struct cdev *dev; 389 int error; 390 391 fp = nsmb_getfp(scred->scr_td->td_proc->p_fd, fd, FREAD | FWRITE); 392 if (fp == NULL) 393 return EBADF; 394 vp = fp->f_vnode; 395 if (vp == NULL) { 396 fdrop(fp, curthread); 397 return EBADF; 398 } 399 dev = vn_todev(vp); 400 if (dev == NULL) { 401 fdrop(fp, curthread); 402 return EBADF; 403 } 404 SMB_CHECKMINOR(dev); 405 ssp = sdp->sd_share; 406 if (ssp == NULL) { 407 fdrop(fp, curthread); 408 return ENOTCONN; 409 } 410 error = smb_share_get(ssp, LK_EXCLUSIVE, scred); 411 if (error == 0) 412 *sspp = ssp; 413 fdrop(fp, curthread); 414 return error; 415 } 416
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