Import kernel part of SMB/CIFS requester.

Add smbfs(CIFS) filesystem.

Userland part will be in the ports tree for a while.

Obtained from:	smbfs-1.3.7-dev package.

1 files changed, 448 insertions, 0 deletions

diff --git a/sys/netsmb/smb_dev.c b/sys/netsmb/smb_dev.c
new file mode 100644
index 0000000..fe00717
--- /dev/null
+++ b/sys/netsmb/smb_dev.c
@@ -0,0 +1,448 @@
+/*
+ * 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.
+ *
+ * $FreeBSD$
+ */
+#include <sys/param.h>
+#include <sys/kernel.h>
+#include <sys/systm.h>
+#include <sys/ioccom.h>
+#include <sys/malloc.h>
+#include <sys/uio.h>
+#include <sys/conf.h>
+#include <sys/mbuf.h>
+#include <sys/proc.h>
+#include <sys/fcntl.h>
+#include <sys/file.h>
+#include <sys/socket.h>
+#include <sys/select.h>
+#include <sys/poll.h>
+#include <sys/socketvar.h>
+#include <sys/sysctl.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_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, "");
+
+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 = {
+	/* 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,
+#ifndef FB_CURRENT
+	/* bmaj */	-1
+#endif
+};
+
+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);
+}
+
+static int
+nsmb_dev_open(dev_t dev, int oflags, int devtype, struct proc *p)
+{
+	struct smb_dev *sdp;
+	struct ucred *cred = p->p_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(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;
+
+	SMB_CHECKMINOR(dev);
+	s = splimp();
+	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);
+/*
+	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;
+}
+
+
+static 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;
+
+	SMB_CHECKMINOR(dev);
+	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, p);
+		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, p);
+		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, p);
+				} 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, p);
+				} 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, p);
+			sdp->sd_level = SMBL_VC;
+		}
+		if (ssp) {
+			sdp->sd_share = ssp;
+			smb_share_unlock(ssp, 0, p);
+			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;
+}
+
+static int
+nsmb_dev_read(dev_t dev, struct uio *uio, int flag)
+{
+	return EACCES;
+}
+
+static int
+nsmb_dev_write(dev_t dev, struct uio *uio, int flag)
+{
+	return EACCES;
+}
+
+static 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;
+		}
+#if __FreeBSD_version > 400001
+		cdevsw_add(&nsmb_cdevsw);
+#endif
+#if __FreeBSD_version > 500000
+		nsmb_dev_tag = EVENTHANDLER_REGISTER(dev_clone, nsmb_dev_clone, 0, 1000);
+#endif
+		printf("netsmb_dev: loaded\n");
+		break;
+	    case MOD_UNLOAD:
+		smb_iod_done();
+		error = smb_sm_done();
+		error = 0;
+#if __FreeBSD_version > 500000
+		EVENTHANDLER_DEREGISTER(dev_clone, nsmb_dev_tag);
+#endif
+#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
+
+
+/*
+ * 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 (((u_int)fd) >= fdp->fd_nfiles ||
+	    (fp = fdp->fd_ofiles[fd]) == NULL ||
+	    (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 = vn_todev(vp);
+	if (dev == NODEV)
+		return EBADF;
+	SMB_CHECKMINOR(dev);
+	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;
+}
+