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 #include <sys/param.h> 31 #include <sys/kernel.h> 32 #include <sys/capsicum.h> 33 #include <sys/module.h> 34 #include <sys/systm.h> 35 #include <sys/conf.h> 36 #include <sys/fcntl.h> 37 #include <sys/ioccom.h> 38 #include <sys/lock.h> 39 #include <sys/malloc.h> 40 #include <sys/file.h> /* Must come after sys/malloc.h */ 41 #include <sys/filedesc.h> 42 #include <sys/mbuf.h> 43 #include <sys/poll.h> 44 #include <sys/proc.h> 45 #include <sys/select.h> 46 #include <sys/socket.h> 47 #include <sys/socketvar.h> 48 #include <sys/sysctl.h> 49 #include <sys/uio.h> 50 #include <sys/vnode.h> 51 52 #include <net/if.h> 53 54 #include <netsmb/smb.h> 55 #include <netsmb/smb_conn.h> 56 #include <netsmb/smb_subr.h> 57 #include <netsmb/smb_dev.h> 58 59 static struct cdev *nsmb_dev; 60 61 static d_open_t nsmb_dev_open; 62 static d_ioctl_t nsmb_dev_ioctl; 63 64 MODULE_DEPEND(netsmb, libiconv, 1, 1, 2); 65 MODULE_VERSION(netsmb, NSMB_VERSION); 66 67 static int smb_version = NSMB_VERSION; 68 struct sx smb_lock; 69 70 SYSCTL_DECL(_net_smb); 71 SYSCTL_INT(_net_smb, OID_AUTO, version, CTLFLAG_RD, &smb_version, 0, ""); 72 73 static MALLOC_DEFINE(M_NSMBDEV, "NETSMBDEV", "NET/SMB device"); 74 75 static struct cdevsw nsmb_cdevsw = { 76 .d_version = D_VERSION, 77 .d_open = nsmb_dev_open, 78 .d_ioctl = nsmb_dev_ioctl, 79 .d_name = NSMB_NAME 80 }; 81 82 static int 83 nsmb_dev_init(void) 84 { 85 86 nsmb_dev = make_dev(&nsmb_cdevsw, 0, UID_ROOT, GID_OPERATOR, 87 0600, "nsmb"); 88 if (nsmb_dev == NULL) 89 return (ENOMEM); 90 return (0); 91 } 92 93 static void 94 nsmb_dev_destroy(void) 95 { 96 97 MPASS(nsmb_dev != NULL); 98 destroy_dev(nsmb_dev); 99 nsmb_dev = NULL; 100 } 101 102 static struct smb_dev * 103 smbdev_alloc(struct cdev *dev) 104 { 105 struct smb_dev *sdp; 106 107 sdp = malloc(sizeof(struct smb_dev), M_NSMBDEV, M_WAITOK | M_ZERO); 108 sdp->dev = dev; 109 sdp->sd_level = -1; 110 sdp->sd_flags |= NSMBFL_OPEN; 111 sdp->refcount = 1; 112 return (sdp); 113 } 114 115 void 116 sdp_dtor(void *arg) 117 { 118 struct smb_dev *dev; 119 120 dev = (struct smb_dev *)arg; 121 SMB_LOCK(); 122 sdp_trydestroy(dev); 123 SMB_UNLOCK(); 124 } 125 126 static int 127 nsmb_dev_open(struct cdev *dev, int oflags, int devtype, struct thread *td) 128 { 129 struct smb_dev *sdp; 130 int error; 131 132 sdp = smbdev_alloc(dev); 133 error = devfs_set_cdevpriv(sdp, sdp_dtor); 134 if (error) { 135 free(sdp, M_NSMBDEV); 136 return (error); 137 } 138 return (0); 139 } 140 141 void 142 sdp_trydestroy(struct smb_dev *sdp) 143 { 144 struct smb_vc *vcp; 145 struct smb_share *ssp; 146 struct smb_cred *scred; 147 148 SMB_LOCKASSERT(); 149 if (!sdp) 150 panic("No smb_dev upon device close"); 151 MPASS(sdp->refcount > 0); 152 sdp->refcount--; 153 if (sdp->refcount) 154 return; 155 scred = malloc(sizeof(struct smb_cred), M_NSMBDEV, M_WAITOK); 156 smb_makescred(scred, curthread, NULL); 157 ssp = sdp->sd_share; 158 if (ssp != NULL) { 159 smb_share_lock(ssp); 160 smb_share_rele(ssp, scred); 161 } 162 vcp = sdp->sd_vc; 163 if (vcp != NULL) { 164 smb_vc_lock(vcp); 165 smb_vc_rele(vcp, scred); 166 } 167 free(scred, M_NSMBDEV); 168 free(sdp, M_NSMBDEV); 169 return; 170 } 171 172 static int 173 nsmb_dev_ioctl(struct cdev *dev, u_long cmd, caddr_t data, int flag, struct thread *td) 174 { 175 struct smb_dev *sdp; 176 struct smb_vc *vcp; 177 struct smb_share *ssp; 178 struct smb_cred *scred; 179 int error = 0; 180 181 error = devfs_get_cdevpriv((void **)&sdp); 182 if (error) 183 return (error); 184 scred = malloc(sizeof(struct smb_cred), M_NSMBDEV, M_WAITOK); 185 SMB_LOCK(); 186 smb_makescred(scred, td, NULL); 187 switch (cmd) { 188 case SMBIOC_OPENSESSION: 189 if (sdp->sd_vc) { 190 error = EISCONN; 191 goto out; 192 } 193 error = smb_usr_opensession((struct smbioc_ossn*)data, 194 scred, &vcp); 195 if (error) 196 break; 197 sdp->sd_vc = vcp; 198 smb_vc_unlock(vcp); 199 sdp->sd_level = SMBL_VC; 200 break; 201 case SMBIOC_OPENSHARE: 202 if (sdp->sd_share) { 203 error = EISCONN; 204 goto out; 205 } 206 if (sdp->sd_vc == NULL) { 207 error = ENOTCONN; 208 goto out; 209 } 210 error = smb_usr_openshare(sdp->sd_vc, 211 (struct smbioc_oshare*)data, scred, &ssp); 212 if (error) 213 break; 214 sdp->sd_share = ssp; 215 smb_share_unlock(ssp); 216 sdp->sd_level = SMBL_SHARE; 217 break; 218 case SMBIOC_REQUEST: 219 if (sdp->sd_share == NULL) { 220 error = ENOTCONN; 221 goto out; 222 } 223 error = smb_usr_simplerequest(sdp->sd_share, 224 (struct smbioc_rq*)data, scred); 225 break; 226 case SMBIOC_T2RQ: 227 if (sdp->sd_share == NULL) { 228 error = ENOTCONN; 229 goto out; 230 } 231 error = smb_usr_t2request(sdp->sd_share, 232 (struct smbioc_t2rq*)data, scred); 233 break; 234 case SMBIOC_SETFLAGS: { 235 struct smbioc_flags *fl = (struct smbioc_flags*)data; 236 int on; 237 238 if (fl->ioc_level == SMBL_VC) { 239 if (fl->ioc_mask & SMBV_PERMANENT) { 240 on = fl->ioc_flags & SMBV_PERMANENT; 241 if ((vcp = sdp->sd_vc) == NULL) { 242 error = ENOTCONN; 243 goto out; 244 } 245 error = smb_vc_get(vcp, scred); 246 if (error) 247 break; 248 if (on && (vcp->obj.co_flags & SMBV_PERMANENT) == 0) { 249 vcp->obj.co_flags |= SMBV_PERMANENT; 250 smb_vc_ref(vcp); 251 } else if (!on && (vcp->obj.co_flags & SMBV_PERMANENT)) { 252 vcp->obj.co_flags &= ~SMBV_PERMANENT; 253 smb_vc_rele(vcp, scred); 254 } 255 smb_vc_put(vcp, scred); 256 } else 257 error = EINVAL; 258 } else if (fl->ioc_level == SMBL_SHARE) { 259 if (fl->ioc_mask & SMBS_PERMANENT) { 260 on = fl->ioc_flags & SMBS_PERMANENT; 261 if ((ssp = sdp->sd_share) == NULL) { 262 error = ENOTCONN; 263 goto out; 264 } 265 error = smb_share_get(ssp, scred); 266 if (error) 267 break; 268 if (on && (ssp->obj.co_flags & SMBS_PERMANENT) == 0) { 269 ssp->obj.co_flags |= SMBS_PERMANENT; 270 smb_share_ref(ssp); 271 } else if (!on && (ssp->obj.co_flags & SMBS_PERMANENT)) { 272 ssp->obj.co_flags &= ~SMBS_PERMANENT; 273 smb_share_rele(ssp, scred); 274 } 275 smb_share_put(ssp, scred); 276 } else 277 error = EINVAL; 278 break; 279 } else 280 error = EINVAL; 281 break; 282 } 283 case SMBIOC_LOOKUP: 284 if (sdp->sd_vc || sdp->sd_share) { 285 error = EISCONN; 286 goto out; 287 } 288 vcp = NULL; 289 ssp = NULL; 290 error = smb_usr_lookup((struct smbioc_lookup*)data, scred, &vcp, &ssp); 291 if (error) 292 break; 293 if (vcp) { 294 sdp->sd_vc = vcp; 295 smb_vc_unlock(vcp); 296 sdp->sd_level = SMBL_VC; 297 } 298 if (ssp) { 299 sdp->sd_share = ssp; 300 smb_share_unlock(ssp); 301 sdp->sd_level = SMBL_SHARE; 302 } 303 break; 304 case SMBIOC_READ: case SMBIOC_WRITE: { 305 struct smbioc_rw *rwrq = (struct smbioc_rw*)data; 306 struct uio auio; 307 struct iovec iov; 308 309 if ((ssp = sdp->sd_share) == NULL) { 310 error = ENOTCONN; 311 goto out; 312 } 313 iov.iov_base = rwrq->ioc_base; 314 iov.iov_len = rwrq->ioc_cnt; 315 auio.uio_iov = &iov; 316 auio.uio_iovcnt = 1; 317 auio.uio_offset = rwrq->ioc_offset; 318 auio.uio_resid = rwrq->ioc_cnt; 319 auio.uio_segflg = UIO_USERSPACE; 320 auio.uio_rw = (cmd == SMBIOC_READ) ? UIO_READ : UIO_WRITE; 321 auio.uio_td = td; 322 if (cmd == SMBIOC_READ) 323 error = smb_read(ssp, rwrq->ioc_fh, &auio, scred); 324 else 325 error = smb_write(ssp, rwrq->ioc_fh, &auio, scred); 326 rwrq->ioc_cnt -= auio.uio_resid; 327 break; 328 } 329 default: 330 error = ENODEV; 331 } 332 out: 333 free(scred, M_NSMBDEV); 334 SMB_UNLOCK(); 335 return error; 336 } 337 338 static int 339 nsmb_dev_load(module_t mod, int cmd, void *arg) 340 { 341 int error = 0; 342 343 switch (cmd) { 344 case MOD_LOAD: 345 error = smb_sm_init(); 346 if (error) 347 break; 348 error = smb_iod_init(); 349 if (error) { 350 smb_sm_done(); 351 break; 352 } 353 error = nsmb_dev_init(); 354 if (error) 355 break; 356 sx_init(&smb_lock, "samba device lock"); 357 break; 358 case MOD_UNLOAD: 359 smb_iod_done(); 360 error = smb_sm_done(); 361 if (error) 362 break; 363 nsmb_dev_destroy(); 364 sx_destroy(&smb_lock); 365 break; 366 default: 367 error = EINVAL; 368 break; 369 } 370 return error; 371 } 372 373 DEV_MODULE (dev_netsmb, nsmb_dev_load, 0); 374 375 int 376 smb_dev2share(int fd, int mode, struct smb_cred *scred, 377 struct smb_share **sspp, struct smb_dev **ssdp) 378 { 379 struct file *fp, *fptmp; 380 struct smb_dev *sdp; 381 struct smb_share *ssp; 382 struct thread *td; 383 int error; 384 385 td = curthread; 386 error = fget(td, fd, &cap_read_rights, &fp); 387 if (error) 388 return (error); 389 fptmp = td->td_fpop; 390 td->td_fpop = fp; 391 error = devfs_get_cdevpriv((void **)&sdp); 392 td->td_fpop = fptmp; 393 fdrop(fp, td); 394 if (error || sdp == NULL) 395 return (error); 396 SMB_LOCK(); 397 *ssdp = sdp; 398 ssp = sdp->sd_share; 399 if (ssp == NULL) { 400 SMB_UNLOCK(); 401 return (ENOTCONN); 402 } 403 error = smb_share_get(ssp, scred); 404 if (error == 0) { 405 sdp->refcount++; 406 *sspp = ssp; 407 } 408 SMB_UNLOCK(); 409 return error; 410 } 411