sys/netproto/smb/smb_dev.c

   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  * $FreeBSD: src/sys/netsmb/smb_dev.c,v 1.2.2.1 2001/05/22 08:32:33 bp Exp $
  33  * $DragonFly: src/sys/netproto/smb/smb_dev.c,v 1.18 2007/05/08 02:31:42 dillon Exp $
  34  */
  35 #include <sys/param.h>
  36 #include <sys/kernel.h>
  37 #include <sys/systm.h>
  38 #include <sys/conf.h>
  39 #include <sys/device.h>
  40 #include <sys/fcntl.h>
  41 #include <sys/malloc.h>
  42 #include <sys/file.h>           /* Must come after sys/malloc.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 #include <sys/thread2.h>
  52 #include <sys/devfs.h>
  53 #include <net/if.h>
  54
  55 #include "smb.h"
  56 #include "smb_conn.h"
  57 #include "smb_subr.h"
  58 #include "smb_dev.h"
  59
  60 #define SMB_GETDEV(dev)         ((struct smb_dev*)(dev)->si_drv1)
  61 #define SMB_CHECKMINOR(dev)     do { \
  62                                     sdp = SMB_GETDEV(dev); \
  63                                     if (sdp == NULL) return ENXIO; \
  64                                 } while(0)
  65
  66 static d_open_t  nsmb_dev_open;
  67 static d_close_t nsmb_dev_close;
  68 static d_read_t  nsmb_dev_read;
  69 static d_write_t nsmb_dev_write;
  70 static d_ioctl_t nsmb_dev_ioctl;
  71 static d_poll_t  nsmb_dev_poll;
  72 static d_clone_t nsmbclone;
  73 DEVFS_DECLARE_CLONE_BITMAP(nsmb);
  74
  75 MODULE_VERSION(netsmb, NSMB_VERSION);
  76
  77 #define SI_NAMED        0
  78
  79 static int smb_version = NSMB_VERSION;
  80
  81
  82 SYSCTL_DECL(_net_smb);
  83 SYSCTL_INT(_net_smb, OID_AUTO, version, CTLFLAG_RD, &smb_version, 0, "");
  84
  85 static MALLOC_DEFINE(M_NSMBDEV, "NETSMBDEV", "NET/SMB device");
  86
  87
  88 /*
  89 int smb_dev_queue(struct smb_dev *ndp, struct smb_rq *rqp, int prio);
  90 */
  91
  92 static struct dev_ops nsmb_ops = {
  93         { NSMB_NAME, NSMB_MAJOR, 0 },
  94         .d_open =       nsmb_dev_open,
  95         .d_close =      nsmb_dev_close,
  96         .d_read =       nsmb_dev_read,
  97         .d_write =      nsmb_dev_write,
  98         .d_ioctl =      nsmb_dev_ioctl,
  99         .d_poll =       nsmb_dev_poll,
 100 };
 101
 102
 103 static int
 104 nsmb_dev_open(struct dev_open_args *ap)
 105 {
 106         cdev_t dev = ap->a_head.a_dev;
 107         struct smb_dev *sdp;
 108
 109         sdp = SMB_GETDEV(dev);
 110         if (sdp && (sdp->sd_flags & NSMBFL_OPEN))
 111                 return EBUSY;
 112         if (sdp == NULL) {
 113                 sdp = kmalloc(sizeof(*sdp), M_NSMBDEV, M_WAITOK);
 114                 dev->si_drv1 = (void*)sdp;
 115         }
 116         /*
 117          * XXX: this is just crazy - make a device for an already passed
 118          * device...  someone should take care of it.
 119          */
 120 #if 0
 121         if ((dev->si_flags & SI_NAMED) == 0) {
 122                 make_dev(&nsmb_ops, minor(dev),
 123                         ap->a_cred->cr_uid, ap->a_cred->cr_gid,
 124                         0700, NSMB_NAME"%d", lminor(dev));
 125         }
 126 #endif
 127         bzero(sdp, sizeof(*sdp));
 128 /*
 129         STAILQ_INIT(&sdp->sd_rqlist);
 130         STAILQ_INIT(&sdp->sd_rplist);
 131         bzero(&sdp->sd_pollinfo, sizeof(struct selinfo));
 132 */
 133         crit_enter();
 134         sdp->sd_level = -1;
 135         sdp->sd_flags |= NSMBFL_OPEN;
 136         crit_exit();
 137         return 0;
 138 }
 139
 140 static int
 141 nsmb_dev_close(struct dev_close_args *ap)
 142 {
 143         cdev_t dev = ap->a_head.a_dev;
 144         struct smb_dev *sdp;
 145         struct smb_vc *vcp;
 146         struct smb_share *ssp;
 147         struct smb_cred scred;
 148
 149         SMB_CHECKMINOR(dev);
 150         crit_enter();
 151         if ((sdp->sd_flags & NSMBFL_OPEN) == 0) {
 152                 crit_exit();
 153                 return EBADF;
 154         }
 155         smb_makescred(&scred, curthread, NULL);
 156         ssp = sdp->sd_share;
 157         if (ssp != NULL)
 158                 smb_share_rele(ssp, &scred);
 159         vcp = sdp->sd_vc;
 160         if (vcp != NULL)
 161                 smb_vc_rele(vcp, &scred);
 162 /*
 163         smb_flushq(&sdp->sd_rqlist);
 164         smb_flushq(&sdp->sd_rplist);
 165 */
 166         dev->si_drv1 = NULL;
 167         kfree(sdp, M_NSMBDEV);
 168         crit_exit();
 169         devfs_clone_bitmap_put(&DEVFS_CLONE_BITMAP(nsmb), dev->si_uminor);
 170         destroy_dev(dev);
 171         return 0;
 172 }
 173
 174
 175 static int
 176 nsmb_dev_ioctl(struct dev_ioctl_args *ap)
 177 {
 178         cdev_t dev = ap->a_head.a_dev;
 179         caddr_t data = ap->a_data;
 180         struct smb_dev *sdp;
 181         struct smb_vc *vcp;
 182         struct smb_share *ssp;
 183         struct smb_cred scred;
 184         int error = 0;
 185
 186         SMB_CHECKMINOR(dev);
 187         if ((sdp->sd_flags & NSMBFL_OPEN) == 0)
 188                 return EBADF;
 189
 190         smb_makescred(&scred, NULL, ap->a_cred);
 191         switch (ap->a_cmd) {
 192             case SMBIOC_OPENSESSION:
 193                 if (sdp->sd_vc)
 194                         return EISCONN;
 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, 0);
 201                 sdp->sd_level = SMBL_VC;
 202                 break;
 203             case SMBIOC_OPENSHARE:
 204                 if (sdp->sd_share)
 205                         return EISCONN;
 206                 if (sdp->sd_vc == NULL)
 207                         return ENOTCONN;
 208                 error = smb_usr_openshare(sdp->sd_vc,
 209                     (struct smbioc_oshare*)data, &scred, &ssp);
 210                 if (error)
 211                         break;
 212                 sdp->sd_share = ssp;
 213                 smb_share_unlock(ssp, 0);
 214                 sdp->sd_level = SMBL_SHARE;
 215                 break;
 216             case SMBIOC_REQUEST:
 217                 if (sdp->sd_share == NULL)
 218                         return ENOTCONN;
 219                 error = smb_usr_simplerequest(sdp->sd_share,
 220                     (struct smbioc_rq*)data, &scred);
 221                 break;
 222             case SMBIOC_T2RQ:
 223                 if (sdp->sd_share == NULL)
 224                         return ENOTCONN;
 225                 error = smb_usr_t2request(sdp->sd_share,
 226                     (struct smbioc_t2rq*)data, &scred);
 227                 break;
 228             case SMBIOC_SETFLAGS: {
 229                 struct smbioc_flags *fl = (struct smbioc_flags*)data;
 230                 int on;
 231
 232                 if (fl->ioc_level == SMBL_VC) {
 233                         if (fl->ioc_mask & SMBV_PERMANENT) {
 234                                 on = fl->ioc_flags & SMBV_PERMANENT;
 235                                 if ((vcp = sdp->sd_vc) == NULL)
 236                                         return ENOTCONN;
 237                                 error = smb_vc_get(vcp, LK_EXCLUSIVE, &scred);
 238                                 if (error)
 239                                         break;
 240                                 if (on && (vcp->obj.co_flags & SMBV_PERMANENT) == 0) {
 241                                         vcp->obj.co_flags |= SMBV_PERMANENT;
 242                                         smb_vc_ref(vcp);
 243                                 } else if (!on && (vcp->obj.co_flags & SMBV_PERMANENT)) {
 244                                         vcp->obj.co_flags &= ~SMBV_PERMANENT;
 245                                         smb_vc_rele(vcp, &scred);
 246                                 }
 247                                 smb_vc_put(vcp, &scred);
 248                         } else
 249                                 error = EINVAL;
 250                 } else if (fl->ioc_level == SMBL_SHARE) {
 251                         if (fl->ioc_mask & SMBS_PERMANENT) {
 252                                 on = fl->ioc_flags & SMBS_PERMANENT;
 253                                 if ((ssp = sdp->sd_share) == NULL)
 254                                         return ENOTCONN;
 255                                 error = smb_share_get(ssp, LK_EXCLUSIVE, &scred);
 256                                 if (error)
 257                                         break;
 258                                 if (on && (ssp->obj.co_flags & SMBS_PERMANENT) == 0) {
 259                                         ssp->obj.co_flags |= SMBS_PERMANENT;
 260                                         smb_share_ref(ssp);
 261                                 } else if (!on && (ssp->obj.co_flags & SMBS_PERMANENT)) {
 262                                         ssp->obj.co_flags &= ~SMBS_PERMANENT;
 263                                         smb_share_rele(ssp, &scred);
 264                                 }
 265                                 smb_share_put(ssp, &scred);
 266                         } else
 267                                 error = EINVAL;
 268                         break;
 269                 } else
 270                         error = EINVAL;
 271                 break;
 272             }
 273             case SMBIOC_LOOKUP:
 274                 if (sdp->sd_vc || sdp->sd_share)
 275                         return EISCONN;
 276                 vcp = NULL;
 277                 ssp = NULL;
 278                 error = smb_usr_lookup((struct smbioc_lookup*)data, &scred, &vcp, &ssp);
 279                 if (error)
 280                         break;
 281                 if (vcp) {
 282                         sdp->sd_vc = vcp;
 283                         smb_vc_unlock(vcp, 0);
 284                         sdp->sd_level = SMBL_VC;
 285                 }
 286                 if (ssp) {
 287                         sdp->sd_share = ssp;
 288                         smb_share_unlock(ssp, 0);
 289                         sdp->sd_level = SMBL_SHARE;
 290                 }
 291                 break;
 292             case SMBIOC_READ: case SMBIOC_WRITE: {
 293                 struct smbioc_rw *rwrq = (struct smbioc_rw*)data;
 294                 struct uio auio;
 295                 struct iovec iov;
 296
 297                 if ((ssp = sdp->sd_share) == NULL)
 298                         return ENOTCONN;
 299                 iov.iov_base = rwrq->ioc_base;
 300                 iov.iov_len = rwrq->ioc_cnt;
 301                 auio.uio_iov = &iov;
 302                 auio.uio_iovcnt = 1;
 303                 auio.uio_offset = rwrq->ioc_offset;
 304                 auio.uio_resid = rwrq->ioc_cnt;
 305                 auio.uio_segflg = UIO_USERSPACE;
 306                 auio.uio_rw = (ap->a_cmd == SMBIOC_READ) ? UIO_READ : UIO_WRITE;
 307                 auio.uio_td = curthread;
 308                 if (ap->a_cmd == SMBIOC_READ)
 309                         error = smb_read(ssp, rwrq->ioc_fh, &auio, &scred);
 310                 else
 311                         error = smb_write(ssp, rwrq->ioc_fh, &auio, &scred);
 312                 rwrq->ioc_cnt -= auio.uio_resid;
 313                 break;
 314             }
 315             default:
 316                 error = ENODEV;
 317         }
 318         return error;
 319 }
 320
 321 static int
 322 nsmb_dev_read(struct dev_read_args *ap)
 323 {
 324         return EACCES;
 325 }
 326
 327 static int
 328 nsmb_dev_write(struct dev_write_args *ap)
 329 {
 330         return EACCES;
 331 }
 332
 333 static int
 334 nsmb_dev_poll(struct dev_poll_args *ap)
 335 {
 336         return ENODEV;
 337 }
 338
 339 static int
 340 nsmbclone(struct dev_clone_args *ap)
 341 {
 342         int unit;
 343
 344         unit = devfs_clone_bitmap_get(&DEVFS_CLONE_BITMAP(nsmb), 0);
 345         ap->a_dev = make_only_dev(&nsmb_ops, unit, 0, 0, 0600,
 346                                   NSMB_NAME"%d", unit);
 347
 348         return 0;
 349 }
 350
 351 static int
 352 nsmb_dev_load(module_t mod, int cmd, void *arg)
 353 {
 354         int error = 0;
 355
 356         switch (cmd) {
 357             case MOD_LOAD:
 358                 error = smb_sm_init();
 359                 if (error)
 360                         break;
 361                 error = smb_iod_init();
 362                 if (error) {
 363                         smb_sm_done();
 364                         break;
 365                 }
 366                 make_autoclone_dev(&nsmb_ops, &DEVFS_CLONE_BITMAP(nsmb),
 367                         nsmbclone, 0, 0, 0700, NSMB_NAME);
 368
 369                 kprintf("netsmb_dev: loaded\n");
 370                 break;
 371             case MOD_UNLOAD:
 372                 smb_iod_done();
 373                 error = smb_sm_done();
 374                 error = 0;
 375                 devfs_clone_handler_del(NSMB_NAME);
 376                 dev_ops_remove_all(&nsmb_ops);
 377                 devfs_clone_bitmap_uninit(&DEVFS_CLONE_BITMAP(nsmb));
 378                 kprintf("netsmb_dev: unloaded\n");
 379                 break;
 380             default:
 381                 error = EINVAL;
 382                 break;
 383         }
 384         return error;
 385 }
 386
 387 DEV_MODULE (dev_netsmb, nsmb_dev_load, 0);
 388
 389 int
 390 smb_dev2share(int fd, int mode, struct smb_cred *scred,
 391         struct smb_share **sspp)
 392 {
 393         struct file *fp;
 394         struct vnode *vp;
 395         struct smb_dev *sdp;
 396         struct smb_share *ssp;
 397         cdev_t dev;
 398         int error;
 399
 400         KKASSERT(scred->scr_td->td_proc);
 401
 402         fp = holdfp(scred->scr_td->td_proc->p_fd, fd, FREAD|FWRITE);
 403         if (fp == NULL)
 404                 return EBADF;
 405
 406         vp = (struct vnode*)fp->f_data;
 407         if (vp == NULL) {
 408                 error = EBADF;
 409                 goto done;
 410         }
 411         dev = vn_todev(vp);
 412         if (dev == NULL) {
 413                 error = EBADF;
 414                 goto done;
 415         }
 416         SMB_CHECKMINOR(dev);
 417         ssp = sdp->sd_share;
 418         if (ssp == NULL) {
 419                 error = ENOTCONN;
 420                 goto done;
 421         }
 422         error = smb_share_get(ssp, LK_EXCLUSIVE, scred);
 423         if (error == 0)
 424                 *sspp = ssp;
 425 done:
 426         fdrop(fp);
 427         return (error);
 428 }
 429