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