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 33 #include <sys/cdefs.h> 34 __FBSDID("$FreeBSD: releng/5.2/sys/netsmb/smb_dev.c 120492 2003-09-26 20:26:25Z fjoe $"); 35 36 #include <sys/param.h> 37 #include <sys/kernel.h> 38 #include <sys/systm.h> 39 #include <sys/conf.h> 40 #include <sys/fcntl.h> 41 #include <sys/ioccom.h> 42 #include <sys/lock.h> 43 #include <sys/malloc.h> 44 #include <sys/file.h> /* Must come after sys/malloc.h */ 45 #include <sys/filedesc.h> 46 #include <sys/mbuf.h> 47 #include <sys/poll.h> 48 #include <sys/proc.h> 49 #include <sys/select.h> 50 #include <sys/socket.h> 51 #include <sys/socketvar.h> 52 #include <sys/sysctl.h> 53 #include <sys/uio.h> 54 #include <sys/vnode.h> 55 56 #include <net/if.h> 57 58 #include <netsmb/smb.h> 59 #include <netsmb/smb_conn.h> 60 #include <netsmb/smb_subr.h> 61 #include <netsmb/smb_dev.h> 62 63 #define SMB_GETDEV(dev) ((struct smb_dev*)(dev)->si_drv1) 64 #define SMB_CHECKMINOR(dev) do { \ 65 sdp = SMB_GETDEV(dev); \ 66 if (sdp == NULL) return ENXIO; \ 67 } while(0) 68 69 static d_open_t nsmb_dev_open; 70 static d_close_t nsmb_dev_close; 71 static d_ioctl_t nsmb_dev_ioctl; 72 73 MODULE_DEPEND(netsmb, libiconv, 1, 1, 2); 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 .d_open = nsmb_dev_open, 91 .d_close = nsmb_dev_close, 92 .d_ioctl = nsmb_dev_ioctl, 93 .d_name = NSMB_NAME, 94 .d_maj = NSMB_MAJOR, 95 }; 96 97 static eventhandler_tag nsmb_dev_tag; 98 99 static void 100 nsmb_dev_clone(void *arg, char *name, int namelen, dev_t *dev) 101 { 102 int u; 103 104 if (*dev != NODEV) 105 return; 106 if (dev_stdclone(name, NULL, NSMB_NAME, &u) != 1) 107 return; 108 *dev = make_dev(&nsmb_cdevsw, unit2minor(u), 0, 0, 0600, 109 NSMB_NAME"%d", u); 110 } 111 112 static int 113 nsmb_dev_open(dev_t dev, int oflags, int devtype, struct thread *td) 114 { 115 struct smb_dev *sdp; 116 struct ucred *cred = td->td_ucred; 117 int s; 118 119 sdp = SMB_GETDEV(dev); 120 if (sdp && (sdp->sd_flags & NSMBFL_OPEN)) 121 return EBUSY; 122 if (sdp == NULL) { 123 sdp = malloc(sizeof(*sdp), M_NSMBDEV, M_WAITOK); 124 dev->si_drv1 = (void*)sdp; 125 } 126 /* 127 * XXX: this is just crazy - make a device for an already passed device... 128 * someone should take care of it. 129 */ 130 if ((dev->si_flags & SI_NAMED) == 0) 131 make_dev(&nsmb_cdevsw, minor(dev), cred->cr_uid, cred->cr_gid, 0700, 132 NSMB_NAME"%d", dev2unit(dev)); 133 bzero(sdp, sizeof(*sdp)); 134 /* 135 STAILQ_INIT(&sdp->sd_rqlist); 136 STAILQ_INIT(&sdp->sd_rplist); 137 bzero(&sdp->sd_pollinfo, sizeof(struct selinfo)); 138 */ 139 s = splimp(); 140 sdp->sd_level = -1; 141 sdp->sd_flags |= NSMBFL_OPEN; 142 splx(s); 143 return 0; 144 } 145 146 static int 147 nsmb_dev_close(dev_t dev, int flag, int fmt, struct thread *td) 148 { 149 struct smb_dev *sdp; 150 struct smb_vc *vcp; 151 struct smb_share *ssp; 152 struct smb_cred scred; 153 int s; 154 155 SMB_CHECKMINOR(dev); 156 s = splimp(); 157 if ((sdp->sd_flags & NSMBFL_OPEN) == 0) { 158 splx(s); 159 return EBADF; 160 } 161 smb_makescred(&scred, td, NULL); 162 ssp = sdp->sd_share; 163 if (ssp != NULL) 164 smb_share_rele(ssp, &scred); 165 vcp = sdp->sd_vc; 166 if (vcp != NULL) 167 smb_vc_rele(vcp, &scred); 168 /* 169 smb_flushq(&sdp->sd_rqlist); 170 smb_flushq(&sdp->sd_rplist); 171 */ 172 dev->si_drv1 = NULL; 173 free(sdp, M_NSMBDEV); 174 destroy_dev(dev); 175 splx(s); 176 return 0; 177 } 178 179 180 static int 181 nsmb_dev_ioctl(dev_t dev, u_long cmd, caddr_t data, int flag, struct thread *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); 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); 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_load(module_t mod, int cmd, void *arg) 326 { 327 int error = 0; 328 329 switch (cmd) { 330 case MOD_LOAD: 331 error = smb_sm_init(); 332 if (error) 333 break; 334 error = smb_iod_init(); 335 if (error) { 336 smb_sm_done(); 337 break; 338 } 339 nsmb_dev_tag = EVENTHANDLER_REGISTER(dev_clone, nsmb_dev_clone, 0, 1000); 340 printf("netsmb_dev: loaded\n"); 341 break; 342 case MOD_UNLOAD: 343 smb_iod_done(); 344 error = smb_sm_done(); 345 error = 0; 346 EVENTHANDLER_DEREGISTER(dev_clone, nsmb_dev_tag); 347 printf("netsmb_dev: unloaded\n"); 348 break; 349 default: 350 error = EINVAL; 351 break; 352 } 353 return error; 354 } 355 356 DEV_MODULE (dev_netsmb, nsmb_dev_load, 0); 357 358 /* 359 * Convert a file descriptor to appropriate smb_share pointer 360 */ 361 static struct file* 362 nsmb_getfp(struct filedesc* fdp, int fd, int flag) 363 { 364 struct file* fp; 365 366 FILEDESC_LOCK(fdp); 367 if (((u_int)fd) >= fdp->fd_nfiles || 368 (fp = fdp->fd_ofiles[fd]) == NULL || 369 (fp->f_flag & flag) == 0) { 370 FILEDESC_UNLOCK(fdp); 371 return (NULL); 372 } 373 fhold(fp); 374 FILEDESC_UNLOCK(fdp); 375 return (fp); 376 } 377 378 int 379 smb_dev2share(int fd, int mode, struct smb_cred *scred, 380 struct smb_share **sspp) 381 { 382 struct file *fp; 383 struct vnode *vp; 384 struct smb_dev *sdp; 385 struct smb_share *ssp; 386 dev_t dev; 387 int error; 388 389 fp = nsmb_getfp(scred->scr_td->td_proc->p_fd, fd, FREAD | FWRITE); 390 if (fp == NULL) 391 return EBADF; 392 vp = fp->f_vnode; 393 if (vp == NULL) { 394 fdrop(fp, curthread); 395 return EBADF; 396 } 397 dev = vn_todev(vp); 398 if (dev == NODEV) { 399 fdrop(fp, curthread); 400 return EBADF; 401 } 402 SMB_CHECKMINOR(dev); 403 ssp = sdp->sd_share; 404 if (ssp == NULL) { 405 fdrop(fp, curthread); 406 return ENOTCONN; 407 } 408 error = smb_share_get(ssp, LK_EXCLUSIVE, scred); 409 if (error == 0) 410 *sspp = ssp; 411 fdrop(fp, curthread); 412 return error; 413 } 414
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