VBoxNetAdp-linux.c revision e43535ace2499e7f8ef8822186047979bd58d464
/* $Id$ */
/** @file
* VBoxNetAdp - Virtual Network Adapter Driver (Host), Linux Specific Code.
*/
/*
* Copyright (C) 2009 Sun Microsystems, Inc.
*
* This file is part of VirtualBox Open Source Edition (OSE), as
* available from http://www.virtualbox.org. This file is free software;
* you can redistribute it and/or modify it under the terms of the GNU
* General Public License (GPL) as published by the Free Software
* Foundation, in version 2 as it comes in the "COPYING" file of the
* VirtualBox OSE distribution. VirtualBox OSE is distributed in the
* hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
*
* Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa
* Clara, CA 95054 USA or visit http://www.sun.com if you need
* additional information or have any questions.
*/
/*******************************************************************************
* Header Files *
*******************************************************************************/
#include "the-linux-kernel.h"
#include "version-generated.h"
#include "product-generated.h"
#include <linux/netdevice.h>
#include <linux/etherdevice.h>
#include <linux/miscdevice.h>
#define LOG_GROUP LOG_GROUP_NET_ADP_DRV
#include <VBox/log.h>
#include <VBox/err.h>
#include <iprt/process.h>
#include <iprt/initterm.h>
#include <iprt/mem.h>
/*
#include <iprt/assert.h>
#include <iprt/semaphore.h>
#include <iprt/spinlock.h>
#include <iprt/string.h>
#include <iprt/uuid.h>
#include <iprt/alloca.h>
*/
#define VBOXNETADP_OS_SPECFIC 1
#include "../VBoxNetAdpInternal.h"
/*******************************************************************************
* Defined Constants And Macros *
*******************************************************************************/
#define VBOXNETADP_LINUX_NAME "vboxnet%d"
#define VBOXNETADP_CTL_DEV_NAME "vboxnetctl"
#define VBOXNETADP_FROM_IFACE(iface) ((PVBOXNETADP) ifnet_softc(iface))
/*******************************************************************************
* Internal Functions *
*******************************************************************************/
static int VBoxNetAdpLinuxInit(void);
static void VBoxNetAdpLinuxUnload(void);
static int VBoxNetAdpLinuxOpen(struct inode *pInode, struct file *pFilp);
static int VBoxNetAdpLinuxClose(struct inode *pInode, struct file *pFilp);
static int VBoxNetAdpLinuxIOCtl(struct inode *pInode, struct file *pFilp, unsigned int uCmd, unsigned long ulArg);
/*******************************************************************************
* Global Variables *
*******************************************************************************/
module_init(VBoxNetAdpLinuxInit);
module_exit(VBoxNetAdpLinuxUnload);
MODULE_AUTHOR(VBOX_VENDOR);
MODULE_DESCRIPTION(VBOX_PRODUCT " Network Adapter Driver");
MODULE_LICENSE("GPL");
#ifdef MODULE_VERSION
MODULE_VERSION(VBOX_VERSION_STRING " (" RT_XSTR(INTNETTRUNKIFPORT_VERSION) ")");
#endif
/**
* The (common) global data.
*/
static struct file_operations gFileOpsVBoxNetAdp =
{
owner: THIS_MODULE,
open: VBoxNetAdpLinuxOpen,
release: VBoxNetAdpLinuxClose,
ioctl: VBoxNetAdpLinuxIOCtl,
};
/** The miscdevice structure. */
static struct miscdevice g_CtlDev =
{
minor: MISC_DYNAMIC_MINOR,
name: VBOXNETADP_CTL_DEV_NAME,
fops: &gFileOpsVBoxNetAdp,
# if LINUX_VERSION_CODE <= KERNEL_VERSION(2, 6, 17)
devfs_name: VBOXNETADP_CTL_DEV_NAME
# endif
};
struct VBoxNetAdpPriv
{
struct net_device_stats Stats;
};
typedef struct VBoxNetAdpPriv VBOXNETADPPRIV;
typedef VBOXNETADPPRIV *PVBOXNETADPPRIV;
static int vboxNetAdpLinuxOpen(struct net_device *pNetDev)
{
netif_start_queue(pNetDev);
return 0;
}
static int vboxNetAdpLinuxStop(struct net_device *pNetDev)
{
netif_stop_queue(pNetDev);
return 0;
}
static int vboxNetAdpLinuxXmit(struct sk_buff *pSkb, struct net_device *pNetDev)
{
PVBOXNETADPPRIV pPriv = netdev_priv(pNetDev);
/* Update the stats. */
pPriv->Stats.tx_packets++;
pPriv->Stats.tx_bytes += pSkb->len;
/* Update transmission time stamp. */
pNetDev->trans_start = jiffies;
/* Nothing else to do, just free the sk_buff. */
dev_kfree_skb(pSkb);
return 0;
}
struct net_device_stats *vboxNetAdpLinuxGetStats(struct net_device *pNetDev)
{
PVBOXNETADPPRIV pPriv = netdev_priv(pNetDev);
return &pPriv->Stats;
}
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 29)
static const struct net_device_ops vboxNetAdpNetdevOps = {
.ndo_open = vboxNetAdpLinuxOpen,
.ndo_stop = vboxNetAdpLinuxStop,
.ndo_start_xmit = vboxNetAdpLinuxXmit,
.ndo_get_stats = vboxNetAdpLinuxGetStats
};
#endif
static void vboxNetAdpNetDevInit(struct net_device *pNetDev)
{
PVBOXNETADPPRIV pPriv;
ether_setup(pNetDev);
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 29)
pNetDev->netdev_ops = &vboxNetAdpNetdevOps;
#else /* LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 29) */
pNetDev->open = vboxNetAdpLinuxOpen;
pNetDev->stop = vboxNetAdpLinuxStop;
pNetDev->hard_start_xmit = vboxNetAdpLinuxXmit;
pNetDev->get_stats = vboxNetAdpLinuxGetStats;
#endif /* LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 29) */
pPriv = netdev_priv(pNetDev);
memset(pPriv, 0, sizeof(*pPriv));
}
int vboxNetAdpOsCreate(PVBOXNETADP pThis, PCRTMAC pMACAddress)
{
int rc = VINF_SUCCESS;
struct net_device *pNetDev;
/* No need for private data. */
pNetDev = alloc_netdev(sizeof(VBOXNETADPPRIV), VBOXNETADP_LINUX_NAME, vboxNetAdpNetDevInit);
if (pNetDev)
{
int err;
memcpy(pNetDev->dev_addr, pMACAddress, ETH_ALEN);
Log2(("vboxNetAdpOsCreate: pNetDev->dev_addr = %.6Rhxd\n", pNetDev->dev_addr));
err = register_netdev(pNetDev);
if (!err)
{
strncpy(pThis->szName, pNetDev->name, VBOXNETADP_MAX_NAME_LEN);
pThis->u.s.pNetDev = pNetDev;
Log2(("vboxNetAdpOsCreate: pThis=%p pThis->szName = %p\n", pThis, pThis->szName));
return VINF_SUCCESS;
}
free_netdev(pNetDev);
rc = RTErrConvertFromErrno(err);
}
return rc;
}
void vboxNetAdpOsDestroy(PVBOXNETADP pThis)
{
struct net_device *pNetDev = pThis->u.s.pNetDev;
AssertPtr(pThis->u.s.pNetDev);
pThis->u.s.pNetDev = NULL;
unregister_netdev(pNetDev);
free_netdev(pNetDev);
}
/**
* Device open. Called on open /dev/vboxnetctl
*
* @param pInode Pointer to inode info structure.
* @param pFilp Associated file pointer.
*/
static int VBoxNetAdpLinuxOpen(struct inode *pInode, struct file *pFilp)
{
Log(("VBoxNetAdpLinuxOpen: pid=%d/%d %s\n", RTProcSelf(), current->pid, current->comm));
/*
* Only root is allowed to access the device, enforce it!
*/
if (!capable(CAP_SYS_ADMIN))
{
Log(("VBoxNetAdpLinuxOpen: admin privileges required!\n"));
return -EPERM;
}
return 0;
}
/**
* Close device.
*
* @param pInode Pointer to inode info structure.
* @param pFilp Associated file pointer.
*/
static int VBoxNetAdpLinuxClose(struct inode *pInode, struct file *pFilp)
{
Log(("VBoxNetAdpLinuxClose: pid=%d/%d %s\n",
RTProcSelf(), current->pid, current->comm));
pFilp->private_data = NULL;
return 0;
}
/**
* Device I/O Control entry point.
*
* @param pFilp Associated file pointer.
* @param uCmd The function specified to ioctl().
* @param ulArg The argument specified to ioctl().
*/
static int VBoxNetAdpLinuxIOCtl(struct inode *pInode, struct file *pFilp, unsigned int uCmd, unsigned long ulArg)
{
VBOXNETADPREQ Req;
PVBOXNETADP pAdp;
int rc;
Log(("VBoxNetAdpLinuxIOCtl: param len %#x; uCmd=%#x; add=%#x\n", _IOC_SIZE(uCmd), uCmd, VBOXNETADP_CTL_ADD));
if (RT_UNLIKELY(_IOC_SIZE(uCmd) != sizeof(Req))) /* paraonia */
{
Log(("VBoxNetAdpLinuxIOCtl: bad ioctl sizeof(Req)=%#x _IOC_SIZE=%#x; uCmd=%#x.\n", sizeof(Req), _IOC_SIZE(uCmd), uCmd));
return -EINVAL;
}
switch (uCmd)
{
case VBOXNETADP_CTL_ADD:
Log(("VBoxNetAdpLinuxIOCtl: _IOC_DIR(uCmd)=%#x; IOC_OUT=%#x\n", _IOC_DIR(uCmd), IOC_OUT));
rc = vboxNetAdpCreate(&pAdp);
if (RT_FAILURE(rc))
{
Log(("VBoxNetAdpLinuxIOCtl: vboxNetAdpCreate -> %Rrc\n", rc));
return -EINVAL;
}
Assert(strlen(pAdp->szName) < sizeof(Req.szName));
strncpy(Req.szName, pAdp->szName, sizeof(Req.szName) - 1);
Req.szName[sizeof(Req.szName) - 1] = '\0';
if (RT_UNLIKELY(copy_to_user((void *)ulArg, &Req, sizeof(Req))))
{
/* this is really bad! */
/** @todo remove the adapter again? */
printk(KERN_ERR "VBoxNetAdpLinuxIOCtl: copy_to_user(%#lx,,%#zx); uCmd=%#x!\n", ulArg, sizeof(Req), uCmd);
return -EFAULT;
}
Log(("VBoxNetAdpLinuxIOCtl: Successfully added '%s'\n", Req.szName));
break;
case VBOXNETADP_CTL_REMOVE:
if (RT_UNLIKELY(copy_from_user(&Req, (void *)ulArg, sizeof(Req))))
{
Log(("VBoxNetAdpLinuxIOCtl: copy_from_user(,%#lx,) failed; uCmd=%#x.\n", ulArg, uCmd));
return -EFAULT;
}
Log(("VBoxNetAdpLinuxIOCtl: Remove %s\n", Req.szName));
pAdp = vboxNetAdpFindByName(Req.szName);
if (!pAdp)
{
Log(("VBoxNetAdpLinuxIOCtl: '%s' not found\n", Req.szName));
return -EINVAL;
}
rc = vboxNetAdpDestroy(pAdp);
if (RT_FAILURE(rc))
{
Log(("VBoxNetAdpLinuxIOCtl: vboxNetAdpDestroy('%s') -> %Rrc\n", Req.szName, rc));
return -EINVAL;
}
Log(("VBoxNetAdpLinuxIOCtl: Successfully removed '%s'\n", Req.szName));
break;
default:
printk(KERN_ERR "VBoxNetAdpLinuxIOCtl: unknown command %x.\n", uCmd);
return -EINVAL;
}
return 0;
}
int vboxNetAdpOsInit(PVBOXNETADP pThis)
{
/*
* Init linux-specific members.
*/
pThis->u.s.pNetDev = NULL;
return VINF_SUCCESS;
}
/**
* Initialize module.
*
* @returns appropriate status code.
*/
static int __init VBoxNetAdpLinuxInit(void)
{
int rc;
/*
* Initialize IPRT.
*/
rc = RTR0Init(0);
if (RT_SUCCESS(rc))
{
Log(("VBoxNetAdpLinuxInit\n"));
rc = vboxNetAdpInit();
if (RT_SUCCESS(rc))
{
rc = misc_register(&g_CtlDev);
if (rc)
{
printk(KERN_ERR "VBoxNetAdp: Can't register " VBOXNETADP_CTL_DEV_NAME " device! rc=%d\n", rc);
return rc;
}
LogRel(("VBoxNetAdp: Successfully started.\n"));
return 0;
}
else
LogRel(("VBoxNetAdp: failed to register vboxnet0 device (rc=%d)\n", rc));
}
else
LogRel(("VBoxNetFlt: failed to initialize IPRT (rc=%d)\n", rc));
return -RTErrConvertToErrno(rc);
}
/**
* Unload the module.
*
* @todo We have to prevent this if we're busy!
*/
static void __exit VBoxNetAdpLinuxUnload(void)
{
int rc;
Log(("VBoxNetFltLinuxUnload\n"));
/*
* Undo the work done during start (in reverse order).
*/
vboxNetAdpShutdown();
/* Remove control device */
rc = misc_deregister(&g_CtlDev);
if (rc < 0)
{
printk(KERN_ERR "misc_deregister failed with rc=%x\n", rc);
}
RTR0Term();
Log(("VBoxNetFltLinuxUnload - done\n"));
}