452 lines
10 KiB
C
452 lines
10 KiB
C
/* $NetBSD: smb_dev.c,v 1.49 2016/07/18 21:03:01 pgoyette Exp $ */
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/*
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* Copyright (c) 2000-2001 Boris Popov
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by Boris Popov.
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* 4. Neither the name of the author nor the names of any co-contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* FreeBSD: src/sys/netsmb/smb_dev.c,v 1.4 2001/12/02 08:47:29 bp Exp
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*/
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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: smb_dev.c,v 1.49 2016/07/18 21:03:01 pgoyette Exp $");
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#include <sys/param.h>
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#include <sys/kernel.h>
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#include <sys/systm.h>
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#include <sys/conf.h>
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#include <sys/fcntl.h>
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#include <sys/filedesc.h>
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#include <sys/ioccom.h>
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#include <sys/lock.h>
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#include <sys/malloc.h>
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#include <sys/file.h> /* Must come after sys/malloc.h */
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#include <sys/module.h>
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#include <sys/mbuf.h>
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#include <sys/poll.h>
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#include <sys/proc.h>
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#include <sys/select.h>
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#include <sys/socket.h>
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#include <sys/socketvar.h>
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#include <sys/sysctl.h>
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#include <sys/uio.h>
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#include <sys/vnode.h>
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#include <miscfs/specfs/specdev.h> /* XXX */
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#include <net/if.h>
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#include <netsmb/smb.h>
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#include <netsmb/smb_conn.h>
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#include <netsmb/smb_subr.h>
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#include <netsmb/smb_dev.h>
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#include <netsmb/smb_rq.h>
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#include "ioconf.h"
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static struct smb_dev **smb_devtbl; /* indexed by minor */
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#define SMB_GETDEV(dev) (smb_devtbl[minor(dev)])
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#define NSMB_DEFNUM 4
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MALLOC_DEFINE(M_NSMBDEV, "NETSMBDEV", "NET/SMB device");
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/*
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int smb_dev_queue(struct smb_dev *ndp, struct smb_rq *rqp, int prio);
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*/
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dev_type_open(nsmb_dev_open);
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dev_type_close(nsmb_dev_close);
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dev_type_ioctl(nsmb_dev_ioctl);
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const struct cdevsw nsmb_cdevsw = {
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.d_open = nsmb_dev_open,
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.d_close = nsmb_dev_close,
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.d_read = noread,
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.d_write = nowrite,
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.d_ioctl = nsmb_dev_ioctl,
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.d_stop = nostop,
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.d_tty = notty,
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.d_poll = nopoll,
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.d_mmap = nommap,
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.d_kqfilter = nokqfilter,
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.d_discard = nodiscard,
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.d_flag = D_OTHER,
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};
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static bool nsmb_inited = false;
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void
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nsmbattach(int num)
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{
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if (nsmb_inited)
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return;
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nsmb_inited = true;
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if (num <= 0) {
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#ifdef DIAGNOSTIC
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panic("nsmbattach: count <= 0");
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#endif
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return;
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}
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if (num == 1)
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num = NSMB_DEFNUM;
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smb_devtbl = malloc(num * sizeof(void *), M_NSMBDEV, M_WAITOK|M_ZERO);
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if (smb_sm_init()) {
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#ifdef DIAGNOSTIC
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panic("netsmbattach: smb_sm_init failed");
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#endif
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return;
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}
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if (smb_iod_init()) {
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#ifdef DIAGNOSTIC
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panic("netsmbattach: smb_iod_init failed");
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#endif
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smb_sm_done();
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return;
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}
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smb_rqpool_init();
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}
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static void
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nsmbdetach(void)
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{
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smb_iod_done();
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smb_sm_done();
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smb_rqpool_fini();
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free(smb_devtbl, M_NSMBDEV);
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nsmb_inited = false;
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}
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int
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nsmb_dev_open(dev_t dev, int oflags, int devtype,
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struct lwp *l)
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{
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struct smb_dev *sdp;
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int s;
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sdp = SMB_GETDEV(dev);
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if (sdp && (sdp->sd_flags & NSMBFL_OPEN))
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return EBUSY;
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if (sdp == NULL) {
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sdp = malloc(sizeof(*sdp), M_NSMBDEV, M_WAITOK);
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smb_devtbl[minor(dev)] = (void*)sdp;
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}
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memset(sdp, 0, sizeof(*sdp));
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/*
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STAILQ_INIT(&sdp->sd_rqlist);
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STAILQ_INIT(&sdp->sd_rplist);
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selinit(&sdp->sd_pollinfo);
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*/
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s = splnet();
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sdp->sd_level = -1;
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sdp->sd_flags |= NSMBFL_OPEN;
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splx(s);
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return 0;
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}
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int
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nsmb_dev_close(dev_t dev, int flag, int fmt, struct lwp *l)
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{
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struct smb_dev *sdp;
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struct smb_vc *vcp;
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struct smb_share *ssp;
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struct smb_cred scred;
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int s;
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sdp = SMB_GETDEV(dev);
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if (!sdp)
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return (ENXIO);
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s = splnet();
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if ((sdp->sd_flags & NSMBFL_OPEN) == 0) {
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splx(s);
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return EBADF;
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}
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smb_makescred(&scred, l, NULL);
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ssp = sdp->sd_share;
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if (ssp != NULL) {
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smb_share_lock(ssp);
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smb_share_rele(ssp, &scred);
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}
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vcp = sdp->sd_vc;
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if (vcp != NULL) {
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smb_vc_lock(vcp);
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smb_vc_rele(vcp, &scred);
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}
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/*
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smb_flushq(&sdp->sd_rqlist);
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smb_flushq(&sdp->sd_rplist);
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seldestroy(&sdp->sd_pollinfo);
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*/
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smb_devtbl[minor(dev)] = NULL;
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free(sdp, M_NSMBDEV);
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splx(s);
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return 0;
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}
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int
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nsmb_dev_ioctl(dev_t dev, u_long cmd, void *data, int flag,
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struct lwp *l)
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{
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struct smb_dev *sdp;
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struct smb_vc *vcp;
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struct smb_share *ssp;
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struct smb_cred scred;
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int error = 0;
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sdp = SMB_GETDEV(dev);
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if (!sdp)
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return (ENXIO);
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if ((sdp->sd_flags & NSMBFL_OPEN) == 0)
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return EBADF;
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smb_makescred(&scred, l, NULL);
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switch (cmd) {
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case SMBIOC_OPENSESSION:
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if (sdp->sd_vc)
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return EISCONN;
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error = smb_usr_opensession((struct smbioc_ossn*)data,
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&scred, &vcp);
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if (error)
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break;
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sdp->sd_vc = vcp;
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smb_vc_unlock(vcp);
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sdp->sd_level = SMBL_VC;
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break;
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case SMBIOC_OPENSHARE:
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if (sdp->sd_share)
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return EISCONN;
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if (sdp->sd_vc == NULL)
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return ENOTCONN;
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error = smb_usr_openshare(sdp->sd_vc,
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(struct smbioc_oshare*)data, &scred, &ssp);
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if (error)
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break;
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sdp->sd_share = ssp;
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smb_share_unlock(ssp);
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sdp->sd_level = SMBL_SHARE;
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break;
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case SMBIOC_REQUEST:
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if (sdp->sd_share == NULL)
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return ENOTCONN;
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error = smb_usr_simplerequest(sdp->sd_share,
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(struct smbioc_rq*)data, &scred);
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break;
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case SMBIOC_T2RQ:
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if (sdp->sd_share == NULL)
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return ENOTCONN;
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error = smb_usr_t2request(sdp->sd_share,
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(struct smbioc_t2rq*)data, &scred);
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break;
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case SMBIOC_SETFLAGS: {
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struct smbioc_flags *fl = (struct smbioc_flags*)data;
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int on;
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if (fl->ioc_level == SMBL_VC) {
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if (fl->ioc_mask & SMBV_PERMANENT) {
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on = fl->ioc_flags & SMBV_PERMANENT;
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if ((vcp = sdp->sd_vc) == NULL)
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return ENOTCONN;
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error = smb_vc_get(vcp, &scred);
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if (error)
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break;
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if (on && (vcp->obj.co_flags & SMBV_PERMANENT) == 0) {
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vcp->obj.co_flags |= SMBV_PERMANENT;
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smb_vc_ref(vcp);
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} else if (!on && (vcp->obj.co_flags & SMBV_PERMANENT)) {
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vcp->obj.co_flags &= ~SMBV_PERMANENT;
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smb_vc_rele(vcp, &scred);
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}
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smb_vc_put(vcp, &scred);
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} else
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error = EINVAL;
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} else if (fl->ioc_level == SMBL_SHARE) {
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if (fl->ioc_mask & SMBS_PERMANENT) {
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on = fl->ioc_flags & SMBS_PERMANENT;
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if ((ssp = sdp->sd_share) == NULL)
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return ENOTCONN;
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error = smb_share_get(ssp, &scred);
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if (error)
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break;
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if (on && (ssp->obj.co_flags & SMBS_PERMANENT) == 0) {
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ssp->obj.co_flags |= SMBS_PERMANENT;
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smb_share_ref(ssp);
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} else if (!on && (ssp->obj.co_flags & SMBS_PERMANENT)) {
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ssp->obj.co_flags &= ~SMBS_PERMANENT;
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smb_share_rele(ssp, &scred);
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}
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smb_share_put(ssp, &scred);
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} else
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error = EINVAL;
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break;
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} else
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error = EINVAL;
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break;
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}
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case SMBIOC_LOOKUP:
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if (sdp->sd_vc || sdp->sd_share)
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return EISCONN;
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vcp = NULL;
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ssp = NULL;
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error = smb_usr_lookup((struct smbioc_lookup*)data, &scred, &vcp, &ssp);
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if (error)
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break;
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if (vcp) {
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sdp->sd_vc = vcp;
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smb_vc_unlock(vcp);
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sdp->sd_level = SMBL_VC;
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}
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if (ssp) {
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sdp->sd_share = ssp;
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smb_share_unlock(ssp);
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sdp->sd_level = SMBL_SHARE;
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}
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break;
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case SMBIOC_READ: case SMBIOC_WRITE: {
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struct smbioc_rw *rwrq = (struct smbioc_rw*)data;
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struct uio auio;
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struct iovec iov;
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if ((ssp = sdp->sd_share) == NULL)
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return ENOTCONN;
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iov.iov_base = rwrq->ioc_base;
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iov.iov_len = rwrq->ioc_cnt;
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auio.uio_iov = &iov;
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auio.uio_iovcnt = 1;
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auio.uio_offset = rwrq->ioc_offset;
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auio.uio_resid = rwrq->ioc_cnt;
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auio.uio_rw = (cmd == SMBIOC_READ) ? UIO_READ : UIO_WRITE;
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auio.uio_vmspace = l->l_proc->p_vmspace;
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if (cmd == SMBIOC_READ)
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error = smb_read(ssp, rwrq->ioc_fh, &auio, &scred);
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else
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error = smb_write(ssp, rwrq->ioc_fh, &auio, &scred);
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rwrq->ioc_cnt -= auio.uio_resid;
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break;
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}
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default:
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error = ENODEV;
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}
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return error;
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}
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MODULE(MODULE_CLASS_DRIVER, nsmb, NULL);
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static int
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nsmb_modcmd(modcmd_t cmd, void *arg)
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{
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#ifdef _MODULE
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devmajor_t cmajor = NODEVMAJOR, bmajor = NODEVMAJOR;
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#endif
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int error = 0;
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switch (cmd) {
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case MODULE_CMD_INIT:
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nsmbattach(1);
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#ifdef _MODULE
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error =
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devsw_attach("nsmb", NULL, &bmajor, &nsmb_cdevsw, &cmajor);
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if (error) {
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nsmbdetach();
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}
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#endif
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break;
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case MODULE_CMD_FINI:
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#ifdef _MODULE
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error = devsw_detach(NULL, &nsmb_cdevsw);
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if (error)
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break;
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#endif
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nsmbdetach();
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break;
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default:
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error = ENOTTY;
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break;
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}
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return error;
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}
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/*
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* Convert a file descriptor to appropriate smb_share pointer
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*/
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int
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smb_dev2share(int fd, int mode, struct smb_cred *scred,
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struct smb_share **sspp)
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{
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file_t *fp;
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struct vnode *vp;
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struct smb_dev *sdp;
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struct smb_share *ssp;
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dev_t dev;
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int error;
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if ((fp = fd_getfile(fd)) == NULL)
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return (EBADF);
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vp = fp->f_vnode;
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if (fp->f_type != DTYPE_VNODE
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|| (fp->f_flag & (FREAD|FWRITE)) == 0
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|| vp->v_type != VCHR
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|| vp->v_rdev == NODEV) {
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fd_putfile(fd);
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return (EBADF);
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}
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dev = vp->v_rdev;
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fd_putfile(fd);
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sdp = SMB_GETDEV(dev);
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if (!sdp)
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return (ENXIO);
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ssp = sdp->sd_share;
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if (ssp == NULL)
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return ENOTCONN;
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error = smb_share_get(ssp, scred);
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if (error)
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return error;
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*sspp = ssp;
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return 0;
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}
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