NetBSD/sys/netsmb/smb_dev.c

/*	$NetBSD: smb_dev.c,v 1.3 2001/06/14 20:32:48 thorpej Exp $	*/

/*
 * Copyright (c) 2000, 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 <netsmb.h>

#include <sys/param.h>
#include <sys/ioccom.h>
#include <sys/malloc.h>
#include <sys/uio.h>
#include <sys/kernel.h>
#include <sys/systm.h>
#include <sys/conf.h>
#include <sys/mbuf.h>
#include <sys/proc.h>
#include <sys/fcntl.h>
#include <sys/file.h>
#include <sys/filedesc.h>
#include <sys/socket.h>
#include <sys/select.h>
#include <sys/poll.h>
#include <sys/socketvar.h>
#include <uvm/uvm_extern.h>
#include <sys/sysctl.h>
#include <sys/vnode.h>
#include <sys/conf.h>

#include <net/if.h>

#include <sys/tree.h>

#include <netsmb/smb.h>
#include <netsmb/smb_conn.h>
#include <netsmb/smb_subr.h>
#include <netsmb/smb_dev.h>

#ifndef FB_RELENG3
#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)
#else
int numnetsmb = 0;
#define SMB_GETDEV(dev)		(nsmbdevs + minor(dev))
#define	SMB_CHECKMINOR(dev)	do { \
				    if (minor(dev) >= numnetsmb) \
					    return ENXIO; \
				    sdp = SMB_GETDEV(dev); \
				} while(0)
#include <miscfs/specfs/specdev.h>

static struct smb_dev *nsmbdevs;
#endif	/* !FB_RELENG3 */

#ifndef NetBSD
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;
#else
cdev_decl(nsmb_dev_);
#endif

#ifdef MODULE_DEPEND
MODULE_DEPEND(netsmb, libiconv, 1, 1, 1);
#endif

#ifdef MODULE_VERSION
MODULE_VERSION(netsmb, 1);
#endif

#ifndef NetBSD
static int smb_version = NSMB_VERSION;
#endif

#ifndef NetBSD
#ifdef SYSCTL_DECL
SYSCTL_DECL(_net_smb);
#endif
SYSCTL_INT(_net_smb, OID_AUTO, version, CTLFLAG_RD, &smb_version, 0, "");

MALLOC_DEFINE(M_NSMBDEV, "NETSMBDEV", "NET/SMB device");
#endif

/*
int smb_dev_queue(struct smb_dev *ndp, struct smb_rq *rqp, int prio);
*/

#ifndef NetBSD
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,
#ifdef FB_RELENG3
	/* stop */	nostop,
	/* reset */	noreset,
	/* devtotty */	nodevtotty,
#endif
	/* poll */	nsmb_dev_poll,
	/* mmap */	nommap,
	/* strategy */	nostrategy,
	/* name */	NSMB_NAME,
#ifndef FB_RELENG3
	/* maj */	NSMB_MAJOR,
	/* dump */	nodump,
	/* psize */	nopsize,
	/* flags */	0,
#else
	/* spare */	NULL,
#endif
	/* bmaj */	-1
};
#endif

void	netsmbattach __P((int));

void
netsmbattach(num)
	int num;
{
	if (num <= 0) {
#ifdef DIAGNOSTIC
		panic("ccdattach: count <= 0");
#endif
		return;
	}
	nsmbdevs = (struct smb_dev *)malloc(num * sizeof(struct smb_dev),
	    M_DEVBUF, M_NOWAIT);
	if (nsmbdevs == NULL) {
		printf("WARNING: no memory for netsmb devices\n");
		return;
	}
	numnetsmb = num;
	if (smb_sm_init()) {
#ifdef DIAGNOSTIC
		panic("netsmbattach: smb_sm_init failed");
#endif
		return;
	}
}

int
nsmb_dev_open(dev_t dev, int oflags, int devtype, struct proc *p)
{
	struct smb_dev *sdp;
#ifndef FB_RELENG3
	struct ucred *cred = p->p_ucred;
#endif
	int s;

	sdp = SMB_GETDEV(dev);
	if (sdp && (sdp->sd_flags & NSMBFL_OPEN))
		return EBUSY;
#ifndef FB_RELENG3
	if (sdp == NULL) {
		MALLOC(sdp, struct smb_dev*, sizeof(*sdp), M_NSMBDEV, M_WAITOK);
		if (sdp == NULL)
			return ENOMEM;
		dev->si_drv1 = (void*)sdp;
	}
	/*
	 * XXX: this is just crazy - make a device for an already passed device...
	 * someone should take care of it.
	 */
	make_dev(&nsmb_cdevsw, minor(dev), cred->cr_uid, cred->cr_gid, 0700,
	    "net/smb%d", lminor(dev));
#endif
	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_conn *scp;
	struct smb_vc *vcp;
	struct smb_share *ssp;
	struct smb_cred scred;
	int s;

	SMB_CHECKMINOR(dev);
	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_rele(ssp, &scred);
	}
	vcp = sdp->sd_vc;
	if (vcp != NULL) {
		smb_vc_rele(vcp, &scred);
	}
	scp = sdp->sd_conn;
	if (scp != NULL)
		smb_conn_rele(scp, &scred);
/*
	smb_flushq(&sdp->sd_rqlist);
	smb_flushq(&sdp->sd_rplist);
*/
#if __FreeBSD_version > 400001
	dev->si_drv1 = NULL;
	free(sdp, M_NSMBDEV);
	destroy_dev(dev);
#else
	sdp->sd_flags &= ~NSMBFL_OPEN;
#endif
	splx(s);
	return 0;
}


int
#ifndef NetBSD
#if __FreeBSD_version >= 300003
nsmb_dev_ioctl(dev_t dev, u_long cmd, caddr_t data, int flag, struct proc *p)
#else
nsmb_dev_ioctl(dev_t dev, int cmd, caddr_t data, int flag, struct proc *p)
#endif
#else
nsmb_dev_ioctl(dev_t dev, u_long cmd, caddr_t data, int flag, struct proc *p)
#endif
{
	struct smb_dev *sdp;
	struct smb_conn *scp;
	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, p, NULL);
	switch (cmd) {
	    case SMBIOC_OPENCONN:
		if (sdp->sd_conn)
			return EISCONN;
		error = smb_usr_openconn((struct smbioc_oconn*)data,
		    &scred, &scp);
		if (error)
			break;
		sdp->sd_conn = scp;
		smb_conn_unlock(scp, p);
		sdp->sd_level = SMBL_CONN;
		break;
	    case SMBIOC_OPENSESSION:
		if (sdp->sd_vc)
			return EISCONN;
		if (sdp->sd_conn == NULL)
			return ENOTCONN;
		error = smb_usr_opensession((struct smbioc_ossn*)data,
		    sdp->sd_conn, &scred, &vcp);
		if (error)
			break;
		sdp->sd_vc = vcp;
		smb_vc_unlock(vcp, 0, &scred);
		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, &scred);
		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, &scred);
				if (error)
					break;
				if (on && (vcp->vc_flags & SMBV_PERMANENT) == 0) {
					vcp->vc_flags |= SMBV_PERMANENT;
					tref(VCTOTN(vcp));
				} else if (!on && (vcp->vc_flags & SMBV_PERMANENT)) {
					vcp->vc_flags &= ~SMBV_PERMANENT;
					trele(VCTOTN(vcp));
				}
				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, &scred);
				if (error)
					break;
				if (on && (ssp->ss_flags & SMBS_PERMANENT) == 0) {
					ssp->ss_flags |= SMBS_PERMANENT;
					tref(SSTOTN(ssp));
				} else if (!on && (ssp->ss_flags & SMBS_PERMANENT)) {
					ssp->ss_flags &= ~SMBS_PERMANENT;
					trele(SSTOTN(ssp));
				}
				smb_share_put(ssp, p);
			} else
				error = EINVAL;
			break;
		} else
			error = EINVAL;
		break;
	    }
	    case SMBIOC_LOOKUP:
		if (sdp->sd_conn || sdp->sd_vc || sdp->sd_share)
			return EISCONN;
		scp = NULL;
		vcp = NULL;
		ssp = NULL;
		error = smb_usr_lookup((struct smbioc_lookup*)data, &scred, &scp, &vcp, &ssp);
		if (error)
			break;
		if (scp) {
			sdp->sd_conn = scp;
			smb_conn_unlock(scp, p);
			sdp->sd_level = SMBL_CONN;
		}
		if (vcp) {
			sdp->sd_vc = vcp;
			smb_vc_unlock(vcp, 0, &scred);
			sdp->sd_level = SMBL_VC;
		}
		if (ssp) {
			sdp->sd_share = ssp;
			smb_share_unlock(ssp, 0, &scred);
			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;
}

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;
}

#ifndef NetBSD
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;
#if __FreeBSD_version > 400001
		cdevsw_add(&nsmb_cdevsw);
#endif
		printf("netsmb_dev: loaded\n");
		break;
	    case MOD_UNLOAD:
		error = smb_sm_done();
		error = 0;
#if __FreeBSD_version > 400001
		cdevsw_remove(&nsmb_cdevsw);
#endif
		printf("netsmb_dev: unloaded\n");
		break;
	    default:
		error = EINVAL;
		break;
	}
	return error;
}

#if __FreeBSD_version > 400000
DEV_MODULE (dev_netsmb, nsmb_dev_load, 0);
#else
CDEV_MODULE(dev_netsmb, NSMB_MAJOR, nsmb_cdevsw, nsmb_dev_load, 0);
#endif
#endif

/*
 * Convert a file descriptor to appropriate smb_share pointer
 */
static struct file*
nsmb_getfp(struct filedesc* fdp, int fd, int flag)
{
	struct file* fp;

	if ((fp = fd_getfile(fdp, fd)) == NULL)
		return (NULL);

	if ((fp->f_flag & flag) == 0)
		return (NULL);

	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;
	dev_t dev;
	int error;

	if ((fp = nsmb_getfp(scred->scr_p->p_fd, fd, FREAD | FWRITE)) == NULL)
		return EBADF;
	vp = (struct vnode*)fp->f_data;
	if (vp == NULL)
		return EBADF;
	dev = vp->v_rdev;
	if (dev == NODEV)
		return EBADF;
	SMB_CHECKMINOR(dev);
	ssp = sdp->sd_share;
	if (ssp == NULL)
		return ENOTCONN;
	error = smb_share_get(ssp, scred);
	if (error)
		return error;
	*sspp = ssp;
	return 0;
}