FreeBSD-5.3/sys/netsmb/smb_dev.c
/*
* Copyright (c) 2000-2001 Boris Popov
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by Boris Popov.
* 4. Neither the name of the author nor the names of any co-contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD: src/sys/netsmb/smb_dev.c,v 1.24 2004/06/17 17:16:51 phk Exp $");
#include <sys/param.h>
#include <sys/kernel.h>
#include <sys/module.h>
#include <sys/systm.h>
#include <sys/conf.h>
#include <sys/fcntl.h>
#include <sys/ioccom.h>
#include <sys/lock.h>
#include <sys/malloc.h>
#include <sys/file.h> /* Must come after sys/malloc.h */
#include <sys/filedesc.h>
#include <sys/mbuf.h>
#include <sys/poll.h>
#include <sys/proc.h>
#include <sys/select.h>
#include <sys/socket.h>
#include <sys/socketvar.h>
#include <sys/sysctl.h>
#include <sys/uio.h>
#include <sys/vnode.h>
#include <net/if.h>
#include <netsmb/smb.h>
#include <netsmb/smb_conn.h>
#include <netsmb/smb_subr.h>
#include <netsmb/smb_dev.h>
#define SMB_GETDEV(dev) ((struct smb_dev*)(dev)->si_drv1)
#define SMB_CHECKMINOR(dev) do { \
sdp = SMB_GETDEV(dev); \
if (sdp == NULL) return ENXIO; \
} while(0)
static d_open_t nsmb_dev_open;
static d_close_t nsmb_dev_close;
static d_ioctl_t nsmb_dev_ioctl;
MODULE_DEPEND(netsmb, libiconv, 1, 1, 2);
MODULE_VERSION(netsmb, NSMB_VERSION);
static int smb_version = NSMB_VERSION;
SYSCTL_DECL(_net_smb);
SYSCTL_INT(_net_smb, OID_AUTO, version, CTLFLAG_RD, &smb_version, 0, "");
static MALLOC_DEFINE(M_NSMBDEV, "NETSMBDEV", "NET/SMB device");
/*
int smb_dev_queue(struct smb_dev *ndp, struct smb_rq *rqp, int prio);
*/
static struct cdevsw nsmb_cdevsw = {
.d_version = D_VERSION,
.d_flags = D_NEEDGIANT,
.d_open = nsmb_dev_open,
.d_close = nsmb_dev_close,
.d_ioctl = nsmb_dev_ioctl,
.d_name = NSMB_NAME
};
static eventhandler_tag nsmb_dev_tag;
static void
nsmb_dev_clone(void *arg, char *name, int namelen, struct cdev **dev)
{
int u;
if (*dev != NULL)
return;
if (dev_stdclone(name, NULL, NSMB_NAME, &u) != 1)
return;
*dev = make_dev(&nsmb_cdevsw, unit2minor(u), 0, 0, 0600,
NSMB_NAME"%d", u);
}
static int
nsmb_dev_open(struct cdev *dev, int oflags, int devtype, struct thread *td)
{
struct smb_dev *sdp;
struct ucred *cred = td->td_ucred;
int s;
sdp = SMB_GETDEV(dev);
if (sdp && (sdp->sd_flags & NSMBFL_OPEN))
return EBUSY;
if (sdp == NULL) {
sdp = malloc(sizeof(*sdp), M_NSMBDEV, M_WAITOK);
dev->si_drv1 = (void*)sdp;
}
/*
* XXX: this is just crazy - make a device for an already passed device...
* someone should take care of it.
*/
if ((dev->si_flags & SI_NAMED) == 0)
make_dev(&nsmb_cdevsw, minor(dev), cred->cr_uid, cred->cr_gid, 0700,
NSMB_NAME"%d", dev2unit(dev));
bzero(sdp, sizeof(*sdp));
/*
STAILQ_INIT(&sdp->sd_rqlist);
STAILQ_INIT(&sdp->sd_rplist);
bzero(&sdp->sd_pollinfo, sizeof(struct selinfo));
*/
s = splimp();
sdp->sd_level = -1;
sdp->sd_flags |= NSMBFL_OPEN;
splx(s);
return 0;
}
static int
nsmb_dev_close(struct cdev *dev, int flag, int fmt, struct thread *td)
{
struct smb_dev *sdp;
struct smb_vc *vcp;
struct smb_share *ssp;
struct smb_cred scred;
int s;
SMB_CHECKMINOR(dev);
s = splimp();
if ((sdp->sd_flags & NSMBFL_OPEN) == 0) {
splx(s);
return EBADF;
}
smb_makescred(&scred, td, NULL);
ssp = sdp->sd_share;
if (ssp != NULL)
smb_share_rele(ssp, &scred);
vcp = sdp->sd_vc;
if (vcp != NULL)
smb_vc_rele(vcp, &scred);
/*
smb_flushq(&sdp->sd_rqlist);
smb_flushq(&sdp->sd_rplist);
*/
dev->si_drv1 = NULL;
free(sdp, M_NSMBDEV);
destroy_dev(dev);
splx(s);
return 0;
}
static int
nsmb_dev_ioctl(struct cdev *dev, u_long cmd, caddr_t data, int flag, struct thread *td)
{
struct smb_dev *sdp;
struct smb_vc *vcp;
struct smb_share *ssp;
struct smb_cred scred;
int error = 0;
SMB_CHECKMINOR(dev);
if ((sdp->sd_flags & NSMBFL_OPEN) == 0)
return EBADF;
smb_makescred(&scred, td, NULL);
switch (cmd) {
case SMBIOC_OPENSESSION:
if (sdp->sd_vc)
return EISCONN;
error = smb_usr_opensession((struct smbioc_ossn*)data,
&scred, &vcp);
if (error)
break;
sdp->sd_vc = vcp;
smb_vc_unlock(vcp, 0, td);
sdp->sd_level = SMBL_VC;
break;
case SMBIOC_OPENSHARE:
if (sdp->sd_share)
return EISCONN;
if (sdp->sd_vc == NULL)
return ENOTCONN;
error = smb_usr_openshare(sdp->sd_vc,
(struct smbioc_oshare*)data, &scred, &ssp);
if (error)
break;
sdp->sd_share = ssp;
smb_share_unlock(ssp, 0, td);
sdp->sd_level = SMBL_SHARE;
break;
case SMBIOC_REQUEST:
if (sdp->sd_share == NULL)
return ENOTCONN;
error = smb_usr_simplerequest(sdp->sd_share,
(struct smbioc_rq*)data, &scred);
break;
case SMBIOC_T2RQ:
if (sdp->sd_share == NULL)
return ENOTCONN;
error = smb_usr_t2request(sdp->sd_share,
(struct smbioc_t2rq*)data, &scred);
break;
case SMBIOC_SETFLAGS: {
struct smbioc_flags *fl = (struct smbioc_flags*)data;
int on;
if (fl->ioc_level == SMBL_VC) {
if (fl->ioc_mask & SMBV_PERMANENT) {
on = fl->ioc_flags & SMBV_PERMANENT;
if ((vcp = sdp->sd_vc) == NULL)
return ENOTCONN;
error = smb_vc_get(vcp, LK_EXCLUSIVE, &scred);
if (error)
break;
if (on && (vcp->obj.co_flags & SMBV_PERMANENT) == 0) {
vcp->obj.co_flags |= SMBV_PERMANENT;
smb_vc_ref(vcp);
} else if (!on && (vcp->obj.co_flags & SMBV_PERMANENT)) {
vcp->obj.co_flags &= ~SMBV_PERMANENT;
smb_vc_rele(vcp, &scred);
}
smb_vc_put(vcp, &scred);
} else
error = EINVAL;
} else if (fl->ioc_level == SMBL_SHARE) {
if (fl->ioc_mask & SMBS_PERMANENT) {
on = fl->ioc_flags & SMBS_PERMANENT;
if ((ssp = sdp->sd_share) == NULL)
return ENOTCONN;
error = smb_share_get(ssp, LK_EXCLUSIVE, &scred);
if (error)
break;
if (on && (ssp->obj.co_flags & SMBS_PERMANENT) == 0) {
ssp->obj.co_flags |= SMBS_PERMANENT;
smb_share_ref(ssp);
} else if (!on && (ssp->obj.co_flags & SMBS_PERMANENT)) {
ssp->obj.co_flags &= ~SMBS_PERMANENT;
smb_share_rele(ssp, &scred);
}
smb_share_put(ssp, &scred);
} else
error = EINVAL;
break;
} else
error = EINVAL;
break;
}
case SMBIOC_LOOKUP:
if (sdp->sd_vc || sdp->sd_share)
return EISCONN;
vcp = NULL;
ssp = NULL;
error = smb_usr_lookup((struct smbioc_lookup*)data, &scred, &vcp, &ssp);
if (error)
break;
if (vcp) {
sdp->sd_vc = vcp;
smb_vc_unlock(vcp, 0, td);
sdp->sd_level = SMBL_VC;
}
if (ssp) {
sdp->sd_share = ssp;
smb_share_unlock(ssp, 0, td);
sdp->sd_level = SMBL_SHARE;
}
break;
case SMBIOC_READ: case SMBIOC_WRITE: {
struct smbioc_rw *rwrq = (struct smbioc_rw*)data;
struct uio auio;
struct iovec iov;
if ((ssp = sdp->sd_share) == NULL)
return ENOTCONN;
iov.iov_base = rwrq->ioc_base;
iov.iov_len = rwrq->ioc_cnt;
auio.uio_iov = &iov;
auio.uio_iovcnt = 1;
auio.uio_offset = rwrq->ioc_offset;
auio.uio_resid = rwrq->ioc_cnt;
auio.uio_segflg = UIO_USERSPACE;
auio.uio_rw = (cmd == SMBIOC_READ) ? UIO_READ : UIO_WRITE;
auio.uio_td = td;
if (cmd == SMBIOC_READ)
error = smb_read(ssp, rwrq->ioc_fh, &auio, &scred);
else
error = smb_write(ssp, rwrq->ioc_fh, &auio, &scred);
rwrq->ioc_cnt -= auio.uio_resid;
break;
}
default:
error = ENODEV;
}
return error;
}
static int
nsmb_dev_load(module_t mod, int cmd, void *arg)
{
int error = 0;
switch (cmd) {
case MOD_LOAD:
error = smb_sm_init();
if (error)
break;
error = smb_iod_init();
if (error) {
smb_sm_done();
break;
}
nsmb_dev_tag = EVENTHANDLER_REGISTER(dev_clone, nsmb_dev_clone, 0, 1000);
printf("netsmb_dev: loaded\n");
break;
case MOD_UNLOAD:
smb_iod_done();
error = smb_sm_done();
error = 0;
EVENTHANDLER_DEREGISTER(dev_clone, nsmb_dev_tag);
printf("netsmb_dev: unloaded\n");
break;
default:
error = EINVAL;
break;
}
return error;
}
DEV_MODULE (dev_netsmb, nsmb_dev_load, 0);
/*
* Convert a file descriptor to appropriate smb_share pointer
*/
static struct file*
nsmb_getfp(struct filedesc* fdp, int fd, int flag)
{
struct file* fp;
FILEDESC_LOCK(fdp);
if (((u_int)fd) >= fdp->fd_nfiles ||
(fp = fdp->fd_ofiles[fd]) == NULL ||
(fp->f_flag & flag) == 0) {
FILEDESC_UNLOCK(fdp);
return (NULL);
}
fhold(fp);
FILEDESC_UNLOCK(fdp);
return (fp);
}
int
smb_dev2share(int fd, int mode, struct smb_cred *scred,
struct smb_share **sspp)
{
struct file *fp;
struct vnode *vp;
struct smb_dev *sdp;
struct smb_share *ssp;
struct cdev *dev;
int error;
fp = nsmb_getfp(scred->scr_td->td_proc->p_fd, fd, FREAD | FWRITE);
if (fp == NULL)
return EBADF;
vp = fp->f_vnode;
if (vp == NULL) {
fdrop(fp, curthread);
return EBADF;
}
dev = vn_todev(vp);
if (dev == NULL) {
fdrop(fp, curthread);
return EBADF;
}
SMB_CHECKMINOR(dev);
ssp = sdp->sd_share;
if (ssp == NULL) {
fdrop(fp, curthread);
return ENOTCONN;
}
error = smb_share_get(ssp, LK_EXCLUSIVE, scred);
if (error == 0)
*sspp = ssp;
fdrop(fp, curthread);
return error;
}