1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause 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 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 */ 28 29 #include <sys/cdefs.h> 30 __FBSDID("$FreeBSD$"); 31 32 #include <sys/param.h> 33 #include <sys/kernel.h> 34 #include <sys/capsicum.h> 35 #include <sys/module.h> 36 #include <sys/systm.h> 37 #include <sys/conf.h> 38 #include <sys/fcntl.h> 39 #include <sys/ioccom.h> 40 #include <sys/lock.h> 41 #include <sys/malloc.h> 42 #include <sys/file.h> /* Must come after sys/malloc.h */ 43 #include <sys/filedesc.h> 44 #include <sys/mbuf.h> 45 #include <sys/poll.h> 46 #include <sys/proc.h> 47 #include <sys/select.h> 48 #include <sys/socket.h> 49 #include <sys/socketvar.h> 50 #include <sys/sysctl.h> 51 #include <sys/uio.h> 52 #include <sys/vnode.h> 53 54 #include <net/if.h> 55 56 #include <netsmb/smb.h> 57 #include <netsmb/smb_conn.h> 58 #include <netsmb/smb_subr.h> 59 #include <netsmb/smb_dev.h> 60 61 static struct cdev *nsmb_dev; 62 63 static d_open_t nsmb_dev_open; 64 static d_ioctl_t nsmb_dev_ioctl; 65 66 MODULE_DEPEND(netsmb, libiconv, 1, 1, 2); 67 MODULE_VERSION(netsmb, NSMB_VERSION); 68 69 static int smb_version = NSMB_VERSION; 70 struct sx smb_lock; 71 72 SYSCTL_DECL(_net_smb); 73 SYSCTL_INT(_net_smb, OID_AUTO, version, CTLFLAG_RD, &smb_version, 0, ""); 74 75 static MALLOC_DEFINE(M_NSMBDEV, "NETSMBDEV", "NET/SMB device"); 76 77 static struct cdevsw nsmb_cdevsw = { 78 .d_version = D_VERSION, 79 .d_open = nsmb_dev_open, 80 .d_ioctl = nsmb_dev_ioctl, 81 .d_name = NSMB_NAME 82 }; 83 84 static int 85 nsmb_dev_init(void) 86 { 87 88 nsmb_dev = make_dev(&nsmb_cdevsw, 0, UID_ROOT, GID_OPERATOR, 89 0600, "nsmb"); 90 if (nsmb_dev == NULL) 91 return (ENOMEM); 92 return (0); 93 } 94 95 static void 96 nsmb_dev_destroy(void) 97 { 98 99 MPASS(nsmb_dev != NULL); 100 destroy_dev(nsmb_dev); 101 nsmb_dev = NULL; 102 } 103 104 static struct smb_dev * 105 smbdev_alloc(struct cdev *dev) 106 { 107 struct smb_dev *sdp; 108 109 sdp = malloc(sizeof(struct smb_dev), M_NSMBDEV, M_WAITOK | M_ZERO); 110 sdp->dev = dev; 111 sdp->sd_level = -1; 112 sdp->sd_flags |= NSMBFL_OPEN; 113 sdp->refcount = 1; 114 return (sdp); 115 } 116 117 void 118 sdp_dtor(void *arg) 119 { 120 struct smb_dev *dev; 121 122 dev = (struct smb_dev *)arg; 123 SMB_LOCK(); 124 sdp_trydestroy(dev); 125 SMB_UNLOCK(); 126 } 127 128 static int 129 nsmb_dev_open(struct cdev *dev, int oflags, int devtype, struct thread *td) 130 { 131 struct smb_dev *sdp; 132 int error; 133 134 sdp = smbdev_alloc(dev); 135 error = devfs_set_cdevpriv(sdp, sdp_dtor); 136 if (error) { 137 free(sdp, M_NSMBDEV); 138 return (error); 139 } 140 return (0); 141 } 142 143 void 144 sdp_trydestroy(struct smb_dev *sdp) 145 { 146 struct smb_vc *vcp; 147 struct smb_share *ssp; 148 struct smb_cred *scred; 149 150 SMB_LOCKASSERT(); 151 if (!sdp) 152 panic("No smb_dev upon device close"); 153 MPASS(sdp->refcount > 0); 154 sdp->refcount--; 155 if (sdp->refcount) 156 return; 157 scred = malloc(sizeof(struct smb_cred), M_NSMBDEV, M_WAITOK); 158 smb_makescred(scred, curthread, NULL); 159 ssp = sdp->sd_share; 160 if (ssp != NULL) { 161 smb_share_lock(ssp); 162 smb_share_rele(ssp, scred); 163 } 164 vcp = sdp->sd_vc; 165 if (vcp != NULL) { 166 smb_vc_lock(vcp); 167 smb_vc_rele(vcp, scred); 168 } 169 free(scred, M_NSMBDEV); 170 free(sdp, M_NSMBDEV); 171 return; 172 } 173 174 static int 175 nsmb_dev_ioctl(struct cdev *dev, u_long cmd, caddr_t data, int flag, struct thread *td) 176 { 177 struct smb_dev *sdp; 178 struct smb_vc *vcp; 179 struct smb_share *ssp; 180 struct smb_cred *scred; 181 int error = 0; 182 183 error = devfs_get_cdevpriv((void **)&sdp); 184 if (error) 185 return (error); 186 scred = malloc(sizeof(struct smb_cred), M_NSMBDEV, M_WAITOK); 187 SMB_LOCK(); 188 smb_makescred(scred, td, NULL); 189 switch (cmd) { 190 case SMBIOC_OPENSESSION: 191 if (sdp->sd_vc) { 192 error = EISCONN; 193 goto out; 194 } 195 error = smb_usr_opensession((struct smbioc_ossn*)data, 196 scred, &vcp); 197 if (error) 198 break; 199 sdp->sd_vc = vcp; 200 smb_vc_unlock(vcp); 201 sdp->sd_level = SMBL_VC; 202 break; 203 case SMBIOC_OPENSHARE: 204 if (sdp->sd_share) { 205 error = EISCONN; 206 goto out; 207 } 208 if (sdp->sd_vc == NULL) { 209 error = ENOTCONN; 210 goto out; 211 } 212 error = smb_usr_openshare(sdp->sd_vc, 213 (struct smbioc_oshare*)data, scred, &ssp); 214 if (error) 215 break; 216 sdp->sd_share = ssp; 217 smb_share_unlock(ssp); 218 sdp->sd_level = SMBL_SHARE; 219 break; 220 case SMBIOC_REQUEST: 221 if (sdp->sd_share == NULL) { 222 error = ENOTCONN; 223 goto out; 224 } 225 error = smb_usr_simplerequest(sdp->sd_share, 226 (struct smbioc_rq*)data, scred); 227 break; 228 case SMBIOC_T2RQ: 229 if (sdp->sd_share == NULL) { 230 error = ENOTCONN; 231 goto out; 232 } 233 error = smb_usr_t2request(sdp->sd_share, 234 (struct smbioc_t2rq*)data, scred); 235 break; 236 case SMBIOC_SETFLAGS: { 237 struct smbioc_flags *fl = (struct smbioc_flags*)data; 238 int on; 239 240 if (fl->ioc_level == SMBL_VC) { 241 if (fl->ioc_mask & SMBV_PERMANENT) { 242 on = fl->ioc_flags & SMBV_PERMANENT; 243 if ((vcp = sdp->sd_vc) == NULL) { 244 error = ENOTCONN; 245 goto out; 246 } 247 error = smb_vc_get(vcp, scred); 248 if (error) 249 break; 250 if (on && (vcp->obj.co_flags & SMBV_PERMANENT) == 0) { 251 vcp->obj.co_flags |= SMBV_PERMANENT; 252 smb_vc_ref(vcp); 253 } else if (!on && (vcp->obj.co_flags & SMBV_PERMANENT)) { 254 vcp->obj.co_flags &= ~SMBV_PERMANENT; 255 smb_vc_rele(vcp, scred); 256 } 257 smb_vc_put(vcp, scred); 258 } else 259 error = EINVAL; 260 } else if (fl->ioc_level == SMBL_SHARE) { 261 if (fl->ioc_mask & SMBS_PERMANENT) { 262 on = fl->ioc_flags & SMBS_PERMANENT; 263 if ((ssp = sdp->sd_share) == NULL) { 264 error = ENOTCONN; 265 goto out; 266 } 267 error = smb_share_get(ssp, scred); 268 if (error) 269 break; 270 if (on && (ssp->obj.co_flags & SMBS_PERMANENT) == 0) { 271 ssp->obj.co_flags |= SMBS_PERMANENT; 272 smb_share_ref(ssp); 273 } else if (!on && (ssp->obj.co_flags & SMBS_PERMANENT)) { 274 ssp->obj.co_flags &= ~SMBS_PERMANENT; 275 smb_share_rele(ssp, scred); 276 } 277 smb_share_put(ssp, scred); 278 } else 279 error = EINVAL; 280 break; 281 } else 282 error = EINVAL; 283 break; 284 } 285 case SMBIOC_LOOKUP: 286 if (sdp->sd_vc || sdp->sd_share) { 287 error = EISCONN; 288 goto out; 289 } 290 vcp = NULL; 291 ssp = NULL; 292 error = smb_usr_lookup((struct smbioc_lookup*)data, scred, &vcp, &ssp); 293 if (error) 294 break; 295 if (vcp) { 296 sdp->sd_vc = vcp; 297 smb_vc_unlock(vcp); 298 sdp->sd_level = SMBL_VC; 299 } 300 if (ssp) { 301 sdp->sd_share = ssp; 302 smb_share_unlock(ssp); 303 sdp->sd_level = SMBL_SHARE; 304 } 305 break; 306 case SMBIOC_READ: case SMBIOC_WRITE: { 307 struct smbioc_rw *rwrq = (struct smbioc_rw*)data; 308 struct uio auio; 309 struct iovec iov; 310 311 if ((ssp = sdp->sd_share) == NULL) { 312 error = ENOTCONN; 313 goto out; 314 } 315 iov.iov_base = rwrq->ioc_base; 316 iov.iov_len = rwrq->ioc_cnt; 317 auio.uio_iov = &iov; 318 auio.uio_iovcnt = 1; 319 auio.uio_offset = rwrq->ioc_offset; 320 auio.uio_resid = rwrq->ioc_cnt; 321 auio.uio_segflg = UIO_USERSPACE; 322 auio.uio_rw = (cmd == SMBIOC_READ) ? UIO_READ : UIO_WRITE; 323 auio.uio_td = td; 324 if (cmd == SMBIOC_READ) 325 error = smb_read(ssp, rwrq->ioc_fh, &auio, scred); 326 else 327 error = smb_write(ssp, rwrq->ioc_fh, &auio, scred); 328 rwrq->ioc_cnt -= auio.uio_resid; 329 break; 330 } 331 default: 332 error = ENODEV; 333 } 334 out: 335 free(scred, M_NSMBDEV); 336 SMB_UNLOCK(); 337 return error; 338 } 339 340 static int 341 nsmb_dev_load(module_t mod, int cmd, void *arg) 342 { 343 int error = 0; 344 345 switch (cmd) { 346 case MOD_LOAD: 347 error = smb_sm_init(); 348 if (error) 349 break; 350 error = smb_iod_init(); 351 if (error) { 352 smb_sm_done(); 353 break; 354 } 355 error = nsmb_dev_init(); 356 if (error) 357 break; 358 sx_init(&smb_lock, "samba device lock"); 359 break; 360 case MOD_UNLOAD: 361 smb_iod_done(); 362 error = smb_sm_done(); 363 if (error) 364 break; 365 nsmb_dev_destroy(); 366 sx_destroy(&smb_lock); 367 break; 368 default: 369 error = EINVAL; 370 break; 371 } 372 return error; 373 } 374 375 DEV_MODULE (dev_netsmb, nsmb_dev_load, 0); 376 377 int 378 smb_dev2share(int fd, int mode, struct smb_cred *scred, 379 struct smb_share **sspp, struct smb_dev **ssdp) 380 { 381 struct file *fp, *fptmp; 382 struct smb_dev *sdp; 383 struct smb_share *ssp; 384 struct thread *td; 385 int error; 386 387 td = curthread; 388 error = fget(td, fd, &cap_read_rights, &fp); 389 if (error) 390 return (error); 391 fptmp = td->td_fpop; 392 td->td_fpop = fp; 393 error = devfs_get_cdevpriv((void **)&sdp); 394 td->td_fpop = fptmp; 395 fdrop(fp, td); 396 if (error || sdp == NULL) 397 return (error); 398 SMB_LOCK(); 399 *ssdp = sdp; 400 ssp = sdp->sd_share; 401 if (ssp == NULL) { 402 SMB_UNLOCK(); 403 return (ENOTCONN); 404 } 405 error = smb_share_get(ssp, scred); 406 if (error == 0) { 407 sdp->refcount++; 408 *sspp = ssp; 409 } 410 SMB_UNLOCK(); 411 return error; 412 } 413