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/param.h> 30 #include <sys/kernel.h> 31 #include <sys/capsicum.h> 32 #include <sys/module.h> 33 #include <sys/systm.h> 34 #include <sys/conf.h> 35 #include <sys/fcntl.h> 36 #include <sys/ioccom.h> 37 #include <sys/lock.h> 38 #include <sys/malloc.h> 39 #include <sys/file.h> /* Must come after sys/malloc.h */ 40 #include <sys/filedesc.h> 41 #include <sys/mbuf.h> 42 #include <sys/poll.h> 43 #include <sys/proc.h> 44 #include <sys/select.h> 45 #include <sys/socket.h> 46 #include <sys/socketvar.h> 47 #include <sys/sysctl.h> 48 #include <sys/uio.h> 49 #include <sys/vnode.h> 50 51 #include <net/if.h> 52 53 #include <netsmb/smb.h> 54 #include <netsmb/smb_conn.h> 55 #include <netsmb/smb_subr.h> 56 #include <netsmb/smb_dev.h> 57 58 static struct cdev *nsmb_dev; 59 60 static d_open_t nsmb_dev_open; 61 static d_ioctl_t nsmb_dev_ioctl; 62 63 MODULE_DEPEND(netsmb, libiconv, 1, 1, 2); 64 MODULE_VERSION(netsmb, NSMB_VERSION); 65 66 static int smb_version = NSMB_VERSION; 67 struct sx smb_lock; 68 69 SYSCTL_DECL(_net_smb); 70 SYSCTL_INT(_net_smb, OID_AUTO, version, CTLFLAG_RD, &smb_version, 0, ""); 71 72 static MALLOC_DEFINE(M_NSMBDEV, "NETSMBDEV", "NET/SMB device"); 73 74 static struct cdevsw nsmb_cdevsw = { 75 .d_version = D_VERSION, 76 .d_open = nsmb_dev_open, 77 .d_ioctl = nsmb_dev_ioctl, 78 .d_name = NSMB_NAME 79 }; 80 81 static int 82 nsmb_dev_init(void) 83 { 84 85 nsmb_dev = make_dev(&nsmb_cdevsw, 0, UID_ROOT, GID_OPERATOR, 86 0600, "nsmb"); 87 if (nsmb_dev == NULL) 88 return (ENOMEM); 89 return (0); 90 } 91 92 static void 93 nsmb_dev_destroy(void) 94 { 95 96 MPASS(nsmb_dev != NULL); 97 destroy_dev(nsmb_dev); 98 nsmb_dev = NULL; 99 } 100 101 static struct smb_dev * 102 smbdev_alloc(struct cdev *dev) 103 { 104 struct smb_dev *sdp; 105 106 sdp = malloc(sizeof(struct smb_dev), M_NSMBDEV, M_WAITOK | M_ZERO); 107 sdp->dev = dev; 108 sdp->sd_level = -1; 109 sdp->sd_flags |= NSMBFL_OPEN; 110 sdp->refcount = 1; 111 return (sdp); 112 } 113 114 void 115 sdp_dtor(void *arg) 116 { 117 struct smb_dev *dev; 118 119 dev = (struct smb_dev *)arg; 120 SMB_LOCK(); 121 sdp_trydestroy(dev); 122 SMB_UNLOCK(); 123 } 124 125 static int 126 nsmb_dev_open(struct cdev *dev, int oflags, int devtype, struct thread *td) 127 { 128 struct smb_dev *sdp; 129 int error; 130 131 sdp = smbdev_alloc(dev); 132 error = devfs_set_cdevpriv(sdp, sdp_dtor); 133 if (error) { 134 free(sdp, M_NSMBDEV); 135 return (error); 136 } 137 return (0); 138 } 139 140 void 141 sdp_trydestroy(struct smb_dev *sdp) 142 { 143 struct smb_vc *vcp; 144 struct smb_share *ssp; 145 struct smb_cred *scred; 146 147 SMB_LOCKASSERT(); 148 if (!sdp) 149 panic("No smb_dev upon device close"); 150 MPASS(sdp->refcount > 0); 151 sdp->refcount--; 152 if (sdp->refcount) 153 return; 154 scred = malloc(sizeof(struct smb_cred), M_NSMBDEV, M_WAITOK); 155 smb_makescred(scred, curthread, NULL); 156 ssp = sdp->sd_share; 157 if (ssp != NULL) { 158 smb_share_lock(ssp); 159 smb_share_rele(ssp, scred); 160 } 161 vcp = sdp->sd_vc; 162 if (vcp != NULL) { 163 smb_vc_lock(vcp); 164 smb_vc_rele(vcp, scred); 165 } 166 free(scred, M_NSMBDEV); 167 free(sdp, M_NSMBDEV); 168 return; 169 } 170 171 static int 172 nsmb_dev_ioctl(struct cdev *dev, u_long cmd, caddr_t data, int flag, struct thread *td) 173 { 174 struct smb_dev *sdp; 175 struct smb_vc *vcp; 176 struct smb_share *ssp; 177 struct smb_cred *scred; 178 int error = 0; 179 180 error = devfs_get_cdevpriv((void **)&sdp); 181 if (error) 182 return (error); 183 scred = malloc(sizeof(struct smb_cred), M_NSMBDEV, M_WAITOK); 184 SMB_LOCK(); 185 smb_makescred(scred, td, NULL); 186 switch (cmd) { 187 case SMBIOC_OPENSESSION: 188 if (sdp->sd_vc) { 189 error = EISCONN; 190 goto out; 191 } 192 error = smb_usr_opensession((struct smbioc_ossn*)data, 193 scred, &vcp); 194 if (error) 195 break; 196 sdp->sd_vc = vcp; 197 smb_vc_unlock(vcp); 198 sdp->sd_level = SMBL_VC; 199 break; 200 case SMBIOC_OPENSHARE: 201 if (sdp->sd_share) { 202 error = EISCONN; 203 goto out; 204 } 205 if (sdp->sd_vc == NULL) { 206 error = ENOTCONN; 207 goto out; 208 } 209 error = smb_usr_openshare(sdp->sd_vc, 210 (struct smbioc_oshare*)data, scred, &ssp); 211 if (error) 212 break; 213 sdp->sd_share = ssp; 214 smb_share_unlock(ssp); 215 sdp->sd_level = SMBL_SHARE; 216 break; 217 case SMBIOC_REQUEST: 218 if (sdp->sd_share == NULL) { 219 error = ENOTCONN; 220 goto out; 221 } 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 error = ENOTCONN; 228 goto out; 229 } 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 error = ENOTCONN; 242 goto out; 243 } 244 error = smb_vc_get(vcp, 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 error = ENOTCONN; 262 goto out; 263 } 264 error = smb_share_get(ssp, scred); 265 if (error) 266 break; 267 if (on && (ssp->obj.co_flags & SMBS_PERMANENT) == 0) { 268 ssp->obj.co_flags |= SMBS_PERMANENT; 269 smb_share_ref(ssp); 270 } else if (!on && (ssp->obj.co_flags & SMBS_PERMANENT)) { 271 ssp->obj.co_flags &= ~SMBS_PERMANENT; 272 smb_share_rele(ssp, scred); 273 } 274 smb_share_put(ssp, scred); 275 } else 276 error = EINVAL; 277 break; 278 } else 279 error = EINVAL; 280 break; 281 } 282 case SMBIOC_LOOKUP: 283 if (sdp->sd_vc || sdp->sd_share) { 284 error = EISCONN; 285 goto out; 286 } 287 vcp = NULL; 288 ssp = NULL; 289 error = smb_usr_lookup((struct smbioc_lookup*)data, scred, &vcp, &ssp); 290 if (error) 291 break; 292 if (vcp) { 293 sdp->sd_vc = vcp; 294 smb_vc_unlock(vcp); 295 sdp->sd_level = SMBL_VC; 296 } 297 if (ssp) { 298 sdp->sd_share = ssp; 299 smb_share_unlock(ssp); 300 sdp->sd_level = SMBL_SHARE; 301 } 302 break; 303 case SMBIOC_READ: case SMBIOC_WRITE: { 304 struct smbioc_rw *rwrq = (struct smbioc_rw*)data; 305 struct uio auio; 306 struct iovec iov; 307 308 if ((ssp = sdp->sd_share) == NULL) { 309 error = ENOTCONN; 310 goto out; 311 } 312 iov.iov_base = rwrq->ioc_base; 313 iov.iov_len = rwrq->ioc_cnt; 314 auio.uio_iov = &iov; 315 auio.uio_iovcnt = 1; 316 auio.uio_offset = rwrq->ioc_offset; 317 auio.uio_resid = rwrq->ioc_cnt; 318 auio.uio_segflg = UIO_USERSPACE; 319 auio.uio_rw = (cmd == SMBIOC_READ) ? UIO_READ : UIO_WRITE; 320 auio.uio_td = td; 321 if (cmd == SMBIOC_READ) 322 error = smb_read(ssp, rwrq->ioc_fh, &auio, scred); 323 else 324 error = smb_write(ssp, rwrq->ioc_fh, &auio, scred); 325 rwrq->ioc_cnt -= auio.uio_resid; 326 break; 327 } 328 default: 329 error = ENODEV; 330 } 331 out: 332 free(scred, M_NSMBDEV); 333 SMB_UNLOCK(); 334 return error; 335 } 336 337 static int 338 nsmb_dev_load(module_t mod, int cmd, void *arg) 339 { 340 int error = 0; 341 342 switch (cmd) { 343 case MOD_LOAD: 344 error = smb_sm_init(); 345 if (error) 346 break; 347 error = smb_iod_init(); 348 if (error) { 349 smb_sm_done(); 350 break; 351 } 352 error = nsmb_dev_init(); 353 if (error) 354 break; 355 sx_init(&smb_lock, "samba device lock"); 356 break; 357 case MOD_UNLOAD: 358 smb_iod_done(); 359 error = smb_sm_done(); 360 if (error) 361 break; 362 nsmb_dev_destroy(); 363 sx_destroy(&smb_lock); 364 break; 365 default: 366 error = EINVAL; 367 break; 368 } 369 return error; 370 } 371 372 DEV_MODULE (dev_netsmb, nsmb_dev_load, 0); 373 374 int 375 smb_dev2share(int fd, int mode, struct smb_cred *scred, 376 struct smb_share **sspp, struct smb_dev **ssdp) 377 { 378 struct file *fp, *fptmp; 379 struct smb_dev *sdp; 380 struct smb_share *ssp; 381 struct thread *td; 382 int error; 383 384 td = curthread; 385 error = fget(td, fd, &cap_read_rights, &fp); 386 if (error) 387 return (error); 388 fptmp = td->td_fpop; 389 td->td_fpop = fp; 390 error = devfs_get_cdevpriv((void **)&sdp); 391 td->td_fpop = fptmp; 392 fdrop(fp, td); 393 if (error || sdp == NULL) 394 return (error); 395 SMB_LOCK(); 396 *ssdp = sdp; 397 ssp = sdp->sd_share; 398 if (ssp == NULL) { 399 SMB_UNLOCK(); 400 return (ENOTCONN); 401 } 402 error = smb_share_get(ssp, scred); 403 if (error == 0) { 404 sdp->refcount++; 405 *sspp = ssp; 406 } 407 SMB_UNLOCK(); 408 return error; 409 } 410