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NetBSD/sys/netsmb/smb_dev.c

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/* $NetBSD: smb_dev.c,v 1.19 2004/04/25 16:42:42 simonb Exp $ */
/*
* 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.
*
* FreeBSD: src/sys/netsmb/smb_dev.c,v 1.4 2001/12/02 08:47:29 bp Exp
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: smb_dev.c,v 1.19 2004/04/25 16:42:42 simonb Exp $");
#include <sys/param.h>
#include <sys/kernel.h>
#include <sys/systm.h>
#include <sys/conf.h>
#include <sys/fcntl.h>
#include <sys/filedesc.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/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 <miscfs/specfs/specdev.h> /* XXX */
#include <net/if.h>
#include <netsmb/smb.h>
#include <netsmb/smb_conn.h>
#include <netsmb/smb_subr.h>
#include <netsmb/smb_dev.h>
#include <netsmb/smb_rq.h>
#ifdef __NetBSD__
static struct smb_dev **smb_devtbl; /* indexed by minor */
#define SMB_GETDEV(dev) (smb_devtbl[minor(dev)])
#define NSMB_DEFNUM 4
#else /* !NetBSD */
#define SMB_GETDEV(dev) ((struct smb_dev*)(dev)->si_drv1)
static d_open_t nsmb_dev_open;
static d_close_t nsmb_dev_close;
static d_read_t nsmb_dev_read;
static d_write_t nsmb_dev_write;
static d_ioctl_t nsmb_dev_ioctl;
static d_poll_t nsmb_dev_poll;
MODULE_DEPEND(netsmb, libiconv, 1, 1, 1);
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, "");
#endif /* NetBSD */
static MALLOC_DEFINE(M_NSMBDEV, "NETSMBDEV", "NET/SMB device");
/*
int smb_dev_queue(struct smb_dev *ndp, struct smb_rq *rqp, int prio);
*/
#ifdef __NetBSD__
dev_type_open(nsmb_dev_open);
dev_type_close(nsmb_dev_close);
dev_type_ioctl(nsmb_dev_ioctl);
const struct cdevsw nsmb_cdevsw = {
nsmb_dev_open, nsmb_dev_close, noread, nowrite,
nsmb_dev_ioctl, nostop, notty, nopoll, nommap, nokqfilter,
};
#else
static struct cdevsw nsmb_cdevsw = {
/* open */ nsmb_dev_open,
/* close */ nsmb_dev_close,
/* read */ nsmb_dev_read,
/* write */ nsmb_dev_write,
/* ioctl */ nsmb_dev_ioctl,
/* poll */ nsmb_dev_poll,
/* mmap */ nommap,
/* strategy */ nostrategy,
/* name */ NSMB_NAME,
/* maj */ NSMB_MAJOR,
/* dump */ nodump,
/* psize */ nopsize,
/* flags */ 0,
};
#endif /* !__NetBSD__ */
#ifndef __NetBSD__
static eventhandler_tag nsmb_dev_tag;
static void
nsmb_dev_clone(void *arg, char *name, int namelen, dev_t *dev)
{
int min;
if (*dev != NODEV)
return;
if (dev_stdclone(name, NULL, NSMB_NAME, &min) != 1)
return;
*dev = make_dev(&nsmb_cdevsw, min, 0, 0, 0600, NSMB_NAME"%d", min);
}
#else /* __NetBSD__ */
void nsmbattach(int);
void
nsmbattach(int num)
{
if (num <= 0) {
#ifdef DIAGNOSTIC
panic("nsmbattach: cound <= 0");
#endif
return;
}
if (num == 1)
num = NSMB_DEFNUM;
smb_devtbl = malloc(num * sizeof(void *), M_NSMBDEV, M_WAITOK|M_ZERO);
if (smb_sm_init()) {
#ifdef DIAGNOSTIC
panic("netsmbattach: smb_sm_init failed");
#endif
return;
}
if (smb_iod_init()) {
#ifdef DIAGNOSTIC
panic("netsmbattach: smb_iod_init failed");
#endif
smb_sm_done();
return;
}
}
#endif /* __NetBSD__ */
int
nsmb_dev_open(dev_t dev, int oflags, int devtype, struct proc *p)
{
struct smb_dev *sdp;
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);
smb_devtbl[minor(dev)] = (void*)sdp;
}
#ifndef __NetBSD__
/*
* 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));
#endif /* !__NetBSD__ */
bzero(sdp, sizeof(*sdp));
/*
STAILQ_INIT(&sdp->sd_rqlist);
STAILQ_INIT(&sdp->sd_rplist);
bzero(&sdp->sd_pollinfo, sizeof(struct selinfo));
*/
s = splnet();
sdp->sd_level = -1;
sdp->sd_flags |= NSMBFL_OPEN;
splx(s);
return 0;
}
int
nsmb_dev_close(dev_t dev, int flag, int fmt, struct proc *p)
{
struct smb_dev *sdp;
struct smb_vc *vcp;
struct smb_share *ssp;
struct smb_cred scred;
int s;
sdp = SMB_GETDEV(dev);
if (!sdp)
return (ENXIO);
s = splnet();
if ((sdp->sd_flags & NSMBFL_OPEN) == 0) {
splx(s);
return EBADF;
}
smb_makescred(&scred, p, NULL);
ssp = sdp->sd_share;
if (ssp != NULL) {
smb_share_lock(ssp, 0);
smb_share_rele(ssp, &scred);
}
vcp = sdp->sd_vc;
if (vcp != NULL) {
smb_vc_lock(vcp, 0);
smb_vc_rele(vcp, &scred);
}
/*
smb_flushq(&sdp->sd_rqlist);
smb_flushq(&sdp->sd_rplist);
*/
smb_devtbl[minor(dev)] = NULL;
free(sdp, M_NSMBDEV);
#ifndef __NetBSD__
destroy_dev(dev);
#endif
splx(s);
return 0;
}
int
nsmb_dev_ioctl(dev_t dev, u_long cmd, caddr_t data, int flag, struct proc *p)
{
struct smb_dev *sdp;
struct smb_vc *vcp;
struct smb_share *ssp;
struct smb_cred scred;
int error = 0;
sdp = SMB_GETDEV(dev);
if (!sdp)
return (ENXIO);
if ((sdp->sd_flags & NSMBFL_OPEN) == 0)
return EBADF;
smb_makescred(&scred, p, 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);
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);
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);
sdp->sd_level = SMBL_VC;
}
if (ssp) {
sdp->sd_share = ssp;
smb_share_unlock(ssp, 0);
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_procp = p;
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;
}
#ifndef __NetBSD__
int
nsmb_dev_read(dev_t dev, struct uio *uio, int flag)
{
return EACCES;
}
int
nsmb_dev_write(dev_t dev, struct uio *uio, int flag)
{
return EACCES;
}
int
nsmb_dev_poll(dev_t dev, int events, struct proc *p)
{
return ENODEV;
}
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;
}
cdevsw_add(&nsmb_cdevsw);
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);
cdevsw_remove(&nsmb_cdevsw);
printf("netsmb_dev: unloaded\n");
break;
default:
error = EINVAL;
break;
}
return error;
}
DEV_MODULE (dev_netsmb, nsmb_dev_load, 0);
#endif /* !__NetBSD__ */
/*
* Convert a file descriptor to appropriate smb_share pointer
*/
int
smb_dev2share(int fd, int mode, struct smb_cred *scred,
struct smb_share **sspp)
{
struct proc *p = scred->scr_p;
struct file *fp;
struct vnode *vp;
struct smb_dev *sdp;
struct smb_share *ssp;
dev_t dev;
int error;
if ((fp = fd_getfile(p->p_fd, fd)) == NULL)
return (EBADF);
FILE_USE(fp);
vp = (struct vnode *) fp->f_data;
if (fp->f_type != DTYPE_VNODE
|| (fp->f_flag & (FREAD|FWRITE)) == 0
|| vp->v_type != VCHR
|| vp->v_rdev == NODEV) {
FILE_UNUSE(fp, p);
return (EBADF);
}
dev = vp->v_rdev;
FILE_UNUSE(fp, p);
sdp = SMB_GETDEV(dev);
if (!sdp)
return (ENXIO);
ssp = sdp->sd_share;
if (ssp == NULL)
return ENOTCONN;
error = smb_share_get(ssp, LK_EXCLUSIVE, scred);
if (error)
return error;
*sspp = ssp;
return 0;
}
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