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bhyve: move common code to net_utils.c

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Both virtio_net and e82545 network frontends have code to validate and
generate MAC addresses. These functionalities are replicated in the two
files, so we move them in a separate compilation unit.

Reviewed by:	rgrimes, bryanv, imp, kevans
MFC after:	2 weeks
Differential Revision:	https://reviews.freebsd.org/D20626
This commit is contained in:
Vincenzo Maffione 2019-06-13 17:39:32 +00:00
parent 2e3d6d0f5f
commit 4f7c3b7be5
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=349019
5 changed files with 129 additions and 86 deletions
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1
usr.sbin/bhyve/Makefile
View File

@ -32,6 +32,7 @@ SRCS= \
mem.c \
mevent.c \
mptbl.c \
net_utils.c \
pci_ahci.c \
pci_e82545.c \
pci_emul.c \

83
usr.sbin/bhyve/net_utils.c Normal file
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@ -0,0 +1,83 @@
/*-
* Copyright (c) 2011 NetApp, Inc.
*
* 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.
*
* 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 "net_utils.h"
#include "bhyverun.h"
#include <md5.h>
#include <net/ethernet.h>
#include <string.h>
#include <stdio.h>
#include <errno.h>
int
net_parsemac(char *mac_str, uint8_t *mac_addr)
{
struct ether_addr *ea;
char *tmpstr;
char zero_addr[ETHER_ADDR_LEN] = { 0, 0, 0, 0, 0, 0 };
tmpstr = strsep(&mac_str,"=");
if ((mac_str != NULL) && (!strcmp(tmpstr,"mac"))) {
ea = ether_aton(mac_str);
if (ea == NULL || ETHER_IS_MULTICAST(ea->octet) ||
memcmp(ea->octet, zero_addr, ETHER_ADDR_LEN) == 0) {
fprintf(stderr, "Invalid MAC %s\n", mac_str);
return (EINVAL);
} else
memcpy(mac_addr, ea->octet, ETHER_ADDR_LEN);
}
return (0);
}
void
net_genmac(struct pci_devinst *pi, uint8_t *macaddr)
{
/*
* The default MAC address is the standard NetApp OUI of 00-a0-98,
* followed by an MD5 of the PCI slot/func number and dev name
*/
MD5_CTX mdctx;
unsigned char digest[16];
char nstr[80];
snprintf(nstr, sizeof(nstr), "%d-%d-%s", pi->pi_slot,
pi->pi_func, vmname);
MD5Init(&mdctx);
MD5Update(&mdctx, nstr, (unsigned int)strlen(nstr));
MD5Final(digest, &mdctx);
macaddr[0] = 0x00;
macaddr[1] = 0xa0;
macaddr[2] = 0x98;
macaddr[3] = digest[0];
macaddr[4] = digest[1];
macaddr[5] = digest[2];
}

37
usr.sbin/bhyve/net_utils.h Normal file
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@ -0,0 +1,37 @@
/*-
* Copyright (c) 2019 Vincenzo Maffione <v.maffione@gmail.com>
*
* 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.
*
* 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.
*
* $FreeBSD$
*/
#ifndef _NET_UTILS_H_
#define _NET_UTILS_H_
#include <stdint.h>
#include "pci_emul.h"
void net_genmac(struct pci_devinst *pi, uint8_t *macaddr);
int net_parsemac(char *mac_str, uint8_t *mac_addr);
#endif /* _NET_UTILS_H_ */

47
usr.sbin/bhyve/pci_e82545.c
View File

@ -65,6 +65,7 @@ __FBSDID("$FreeBSD$");
#include "bhyverun.h"
#include "pci_emul.h"
#include "mevent.h"
#include "net_utils.h"
/* Hardware/register definitions XXX: move some to common code. */
#define E82545_VENDOR_ID_INTEL 0x8086
@ -2258,39 +2259,17 @@ e82545_open_tap(struct e82545_softc *sc, char *opts)
}
}
static int
e82545_parsemac(char *mac_str, uint8_t *mac_addr)
{
struct ether_addr *ea;
char *tmpstr;
char zero_addr[ETHER_ADDR_LEN] = { 0, 0, 0, 0, 0, 0 };
tmpstr = strsep(&mac_str,"=");
if ((mac_str != NULL) && (!strcmp(tmpstr,"mac"))) {
ea = ether_aton(mac_str);
if (ea == NULL || ETHER_IS_MULTICAST(ea->octet) ||
memcmp(ea->octet, zero_addr, ETHER_ADDR_LEN) == 0) {
fprintf(stderr, "Invalid MAC %s\n", mac_str);
return (1);
} else
memcpy(mac_addr, ea->octet, ETHER_ADDR_LEN);
}
return (0);
}
static int
e82545_init(struct vmctx *ctx, struct pci_devinst *pi, char *opts)
{
DPRINTF("Loading with options: %s\r\n", opts);
MD5_CTX mdctx;
unsigned char digest[16];
char nstr[80];
struct e82545_softc *sc;
char *devname;
char *vtopts;
int mac_provided;
DPRINTF("Loading with options: %s\r\n", opts);
/* Setup our softc */
sc = calloc(1, sizeof(*sc));
@ -2340,7 +2319,7 @@ e82545_init(struct vmctx *ctx, struct pci_devinst *pi, char *opts)
(void) strsep(&vtopts, ",");
if (vtopts != NULL) {
err = e82545_parsemac(vtopts, sc->esc_mac.octet);
err = net_parsemac(vtopts, sc->esc_mac.octet);
if (err != 0) {
free(devname);
return (err);
@ -2355,24 +2334,8 @@ e82545_init(struct vmctx *ctx, struct pci_devinst *pi, char *opts)
free(devname);
}
/*
* The default MAC address is the standard NetApp OUI of 00-a0-98,
* followed by an MD5 of the PCI slot/func number and dev name
*/
if (!mac_provided) {
snprintf(nstr, sizeof(nstr), "%d-%d-%s", pi->pi_slot,
pi->pi_func, vmname);
MD5Init(&mdctx);
MD5Update(&mdctx, nstr, strlen(nstr));
MD5Final(digest, &mdctx);
sc->esc_mac.octet[0] = 0x00;
sc->esc_mac.octet[1] = 0xa0;
sc->esc_mac.octet[2] = 0x98;
sc->esc_mac.octet[3] = digest[0];
sc->esc_mac.octet[4] = digest[1];
sc->esc_mac.octet[5] = digest[2];
net_genmac(pi, sc->esc_mac.octet);
}
/* H/w initiated reset */

47
usr.sbin/bhyve/pci_virtio_net.c
View File

@ -67,6 +67,7 @@ __FBSDID("$FreeBSD$");
#include "pci_emul.h"
#include "mevent.h"
#include "virtio.h"
#include "net_utils.h"
#define VTNET_RINGSZ 1024
@ -698,29 +699,6 @@ pci_vtnet_ping_ctlq(void *vsc, struct vqueue_info *vq)
}
#endif
static int
pci_vtnet_parsemac(char *mac_str, uint8_t *mac_addr)
{
struct ether_addr *ea;
char *tmpstr;
char zero_addr[ETHER_ADDR_LEN] = { 0, 0, 0, 0, 0, 0 };
tmpstr = strsep(&mac_str,"=");
if ((mac_str != NULL) && (!strcmp(tmpstr,"mac"))) {
ea = ether_aton(mac_str);
if (ea == NULL || ETHER_IS_MULTICAST(ea->octet) ||
memcmp(ea->octet, zero_addr, ETHER_ADDR_LEN) == 0) {
fprintf(stderr, "Invalid MAC %s\n", mac_str);
return (EINVAL);
} else
memcpy(mac_addr, ea->octet, ETHER_ADDR_LEN);
}
return (0);
}
static void
pci_vtnet_tap_setup(struct pci_vtnet_softc *sc, char *devname)
{
@ -795,9 +773,6 @@ pci_vtnet_netmap_setup(struct pci_vtnet_softc *sc, char *ifname)
static int
pci_vtnet_init(struct vmctx *ctx, struct pci_devinst *pi, char *opts)
{
MD5_CTX mdctx;
unsigned char digest[16];
char nstr[80];
char tname[MAXCOMLEN + 1];
struct pci_vtnet_softc *sc;
char *devname;
@ -834,7 +809,7 @@ pci_vtnet_init(struct vmctx *ctx, struct pci_devinst *pi, char *opts)
(void) strsep(&vtopts, ",");
if (vtopts != NULL) {
err = pci_vtnet_parsemac(vtopts, sc->vsc_config.mac);
err = net_parsemac(vtopts, sc->vsc_config.mac);
if (err != 0) {
free(devname);
return (err);
@ -851,24 +826,8 @@ pci_vtnet_init(struct vmctx *ctx, struct pci_devinst *pi, char *opts)
free(devname);
}
/*
* The default MAC address is the standard NetApp OUI of 00-a0-98,
* followed by an MD5 of the PCI slot/func number and dev name
*/
if (!mac_provided) {
snprintf(nstr, sizeof(nstr), "%d-%d-%s", pi->pi_slot,
pi->pi_func, vmname);
MD5Init(&mdctx);
MD5Update(&mdctx, nstr, strlen(nstr));
MD5Final(digest, &mdctx);
sc->vsc_config.mac[0] = 0x00;
sc->vsc_config.mac[1] = 0xa0;
sc->vsc_config.mac[2] = 0x98;
sc->vsc_config.mac[3] = digest[0];
sc->vsc_config.mac[4] = digest[1];
sc->vsc_config.mac[5] = digest[2];
net_genmac(pi, sc->vsc_config.mac);
}
/* initialize config space */