mirror of
https://gitlab.com/libvirt/libvirt.git
synced 2024-08-28 11:31:16 +00:00
util: Functions to update host network device's multicast filter
This patch provides the utility functions to needed to synchronize the changes made to a guest domain network device's multicast filter with the corresponding macvtap device's filter on the host: * Get/add/remove multicast MAC addresses * Get the macvtap device's RX filter list Signed-off-by: Tony Krowiak <akrowiak@linux.vnet.ibm.com> Signed-off-by: Laine Stump <laine@laine.org>
This commit is contained in:
parent
2086a9905a
commit
cc0e8c244d
@ -1592,13 +1592,16 @@ virMacAddrIsBroadcastRaw;
|
||||
virMacAddrIsMulticast;
|
||||
virMacAddrIsUnicast;
|
||||
virMacAddrParse;
|
||||
virMacAddrParseHex;
|
||||
virMacAddrSet;
|
||||
virMacAddrSetRaw;
|
||||
|
||||
|
||||
# util/virnetdev.h
|
||||
virNetDevAddMulti;
|
||||
virNetDevAddRoute;
|
||||
virNetDevClearIPv4Address;
|
||||
virNetDevDelMulti;
|
||||
virNetDevExists;
|
||||
virNetDevGetIndex;
|
||||
virNetDevGetIPv4Address;
|
||||
@ -1606,6 +1609,7 @@ virNetDevGetLinkInfo;
|
||||
virNetDevGetMAC;
|
||||
virNetDevGetMTU;
|
||||
virNetDevGetPhysicalFunction;
|
||||
virNetDevGetRxFilter;
|
||||
virNetDevGetVirtualFunctionIndex;
|
||||
virNetDevGetVirtualFunctionInfo;
|
||||
virNetDevGetVirtualFunctions;
|
||||
|
@ -29,6 +29,7 @@
|
||||
#include "c-ctype.h"
|
||||
#include "virmacaddr.h"
|
||||
#include "virrandom.h"
|
||||
#include "virutil.h"
|
||||
|
||||
static const unsigned char virMacAddrBroadcastAddrRaw[VIR_MAC_BUFLEN] =
|
||||
{ 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
|
||||
@ -198,6 +199,30 @@ virMacAddrFormat(const virMacAddr *addr,
|
||||
return str;
|
||||
}
|
||||
|
||||
/**
|
||||
* virMacAddrParseHex:
|
||||
* @str: string hexadecimal representation of MAC address, e.g., "F801EFCE3aCB"
|
||||
* @addr: 6-byte MAC address
|
||||
*
|
||||
* Parse the hexadecimal representation of a MAC address
|
||||
*
|
||||
* Return 0 upon success, or -1 in case of error.
|
||||
*/
|
||||
int
|
||||
virMacAddrParseHex(const char *str, virMacAddrPtr addr)
|
||||
{
|
||||
size_t i;
|
||||
|
||||
if (strspn(str, "0123456789abcdefABCDEF") != VIR_MAC_HEXLEN ||
|
||||
str[VIR_MAC_HEXLEN])
|
||||
return -1;
|
||||
|
||||
for (i = 0; i < VIR_MAC_BUFLEN; i++)
|
||||
addr->addr[i] = (virHexToBin(str[2 * i]) << 4 |
|
||||
virHexToBin(str[2 * i + 1]));
|
||||
return 0;
|
||||
}
|
||||
|
||||
void virMacAddrGenerate(const unsigned char prefix[VIR_MAC_PREFIX_BUFLEN],
|
||||
virMacAddrPtr addr)
|
||||
{
|
||||
|
@ -27,6 +27,7 @@
|
||||
# include "internal.h"
|
||||
|
||||
# define VIR_MAC_BUFLEN 6
|
||||
# define VIR_MAC_HEXLEN (VIR_MAC_BUFLEN * 2)
|
||||
# define VIR_MAC_PREFIX_BUFLEN 3
|
||||
# define VIR_MAC_STRING_BUFLEN (VIR_MAC_BUFLEN * 3)
|
||||
|
||||
@ -50,6 +51,9 @@ void virMacAddrGenerate(const unsigned char prefix[VIR_MAC_PREFIX_BUFLEN],
|
||||
virMacAddrPtr addr);
|
||||
int virMacAddrParse(const char* str,
|
||||
virMacAddrPtr addr) ATTRIBUTE_RETURN_CHECK;
|
||||
int virMacAddrParseHex(const char* str,
|
||||
virMacAddrPtr addr)
|
||||
ATTRIBUTE_NONNULL(1) ATTRIBUTE_NONNULL(2) ATTRIBUTE_RETURN_CHECK;
|
||||
bool virMacAddrIsUnicast(const virMacAddr *addr);
|
||||
bool virMacAddrIsMulticast(const virMacAddr *addr);
|
||||
bool virMacAddrIsBroadcastRaw(const unsigned char s[VIR_MAC_BUFLEN]);
|
||||
|
@ -56,6 +56,35 @@
|
||||
|
||||
VIR_LOG_INIT("util.netdev");
|
||||
|
||||
#define PROC_NET_DEV_MCAST "/proc/net/dev_mcast"
|
||||
#define MAX_MCAST_SIZE 50*14336
|
||||
#define VIR_MCAST_NAME_LEN (IFNAMSIZ + 1)
|
||||
#define VIR_MCAST_INDEX_TOKEN_IDX 0
|
||||
#define VIR_MCAST_NAME_TOKEN_IDX 1
|
||||
#define VIR_MCAST_USERS_TOKEN_IDX 2
|
||||
#define VIR_MCAST_GLOBAL_TOKEN_IDX 3
|
||||
#define VIR_MCAST_ADDR_TOKEN_IDX 4
|
||||
#define VIR_MCAST_NUM_TOKENS 5
|
||||
#define VIR_MCAST_TOKEN_DELIMS " \n"
|
||||
#define VIR_MCAST_ADDR_LEN (VIR_MAC_HEXLEN + 1)
|
||||
|
||||
typedef struct _virNetDevMcastEntry virNetDevMcastEntry;
|
||||
typedef virNetDevMcastEntry *virNetDevMcastEntryPtr;
|
||||
struct _virNetDevMcastEntry {
|
||||
int index;
|
||||
char name[VIR_MCAST_NAME_LEN];
|
||||
int users;
|
||||
bool global;
|
||||
virMacAddr macaddr;
|
||||
};
|
||||
|
||||
typedef struct _virNetDevMcastList virNetDevMcastList;
|
||||
typedef virNetDevMcastList *virNetDevMcastListPtr;
|
||||
struct _virNetDevMcastList {
|
||||
size_t nentries;
|
||||
virNetDevMcastEntryPtr *entries;
|
||||
};
|
||||
|
||||
#if defined(HAVE_STRUCT_IFREQ)
|
||||
static int virNetDevSetupControlFull(const char *ifname,
|
||||
struct ifreq *ifr,
|
||||
@ -1942,6 +1971,238 @@ virNetDevGetLinkInfo(const char *ifname,
|
||||
#endif /* defined(__linux__) */
|
||||
|
||||
|
||||
#if defined(SIOCADDMULTI) && defined(HAVE_STRUCT_IFREQ)
|
||||
/**
|
||||
* virNetDevAddMulti:
|
||||
* @ifname: interface name to which to add multicast MAC address
|
||||
* @macaddr: MAC address
|
||||
*
|
||||
* This function adds the @macaddr to the multicast list for a given interface
|
||||
* @ifname.
|
||||
*
|
||||
* Returns 0 in case of success or -1 on failure
|
||||
*/
|
||||
int virNetDevAddMulti(const char *ifname,
|
||||
virMacAddrPtr macaddr)
|
||||
{
|
||||
int fd = -1;
|
||||
int ret = -1;
|
||||
struct ifreq ifr;
|
||||
|
||||
if ((fd = virNetDevSetupControl(ifname, &ifr)) < 0)
|
||||
return -1;
|
||||
|
||||
ifr.ifr_hwaddr.sa_family = AF_UNSPEC;
|
||||
virMacAddrGetRaw(macaddr, (unsigned char *)ifr.ifr_hwaddr.sa_data);
|
||||
|
||||
if (ioctl(fd, SIOCADDMULTI, &ifr) < 0) {
|
||||
char macstr[VIR_MAC_STRING_BUFLEN];
|
||||
virReportSystemError(errno,
|
||||
_("Cannot add multicast MAC %s on '%s' interface"),
|
||||
virMacAddrFormat(macaddr, macstr), ifname);
|
||||
goto cleanup;
|
||||
}
|
||||
|
||||
ret = 0;
|
||||
cleanup:
|
||||
VIR_FORCE_CLOSE(fd);
|
||||
return ret;
|
||||
}
|
||||
#else
|
||||
int virNetDevAddMulti(const char *ifname ATTRIBUTE_UNUSED,
|
||||
virMacAddrPtr macaddr ATTRIBUTE_UNUSED)
|
||||
{
|
||||
virReportSystemError(ENOSYS, "%s",
|
||||
_("Unable to add address to interface "
|
||||
"multicast list on this platform"));
|
||||
return -1;
|
||||
}
|
||||
#endif
|
||||
|
||||
#if defined(SIOCDELMULTI) && defined(HAVE_STRUCT_IFREQ)
|
||||
/**
|
||||
* virNetDevDelMulti:
|
||||
* @ifname: interface name from which to delete the multicast MAC address
|
||||
* @macaddr: MAC address
|
||||
*
|
||||
* This function deletes the @macaddr from the multicast list for a given
|
||||
* interface @ifname.
|
||||
*
|
||||
* Returns 0 in case of success or -1 on failure
|
||||
*/
|
||||
int virNetDevDelMulti(const char *ifname,
|
||||
virMacAddrPtr macaddr)
|
||||
{
|
||||
int fd = -1;
|
||||
int ret = -1;
|
||||
struct ifreq ifr;
|
||||
|
||||
if ((fd = virNetDevSetupControl(ifname, &ifr)) < 0)
|
||||
return -1;
|
||||
|
||||
ifr.ifr_hwaddr.sa_family = AF_UNSPEC;
|
||||
virMacAddrGetRaw(macaddr, (unsigned char *)ifr.ifr_hwaddr.sa_data);
|
||||
|
||||
if (ioctl(fd, SIOCDELMULTI, &ifr) < 0) {
|
||||
char macstr[VIR_MAC_STRING_BUFLEN];
|
||||
virReportSystemError(errno,
|
||||
_("Cannot add multicast MAC %s on '%s' interface"),
|
||||
virMacAddrFormat(macaddr, macstr), ifname);
|
||||
goto cleanup;
|
||||
}
|
||||
|
||||
ret = 0;
|
||||
cleanup:
|
||||
VIR_FORCE_CLOSE(fd);
|
||||
return ret;
|
||||
}
|
||||
#else
|
||||
int virNetDevDelMulti(const char *ifname ATTRIBUTE_UNUSED,
|
||||
virMacAddrPtr macaddr ATTRIBUTE_UNUSED)
|
||||
{
|
||||
virReportSystemError(ENOSYS, "%s",
|
||||
_("Unable to delete address from interface "
|
||||
"multicast list on this platform"));
|
||||
return -1;
|
||||
}
|
||||
#endif
|
||||
|
||||
static int virNetDevParseMcast(char *buf, virNetDevMcastEntryPtr mcast)
|
||||
{
|
||||
int ifindex;
|
||||
int num;
|
||||
char *next;
|
||||
char *token;
|
||||
char *saveptr;
|
||||
char *endptr;
|
||||
|
||||
for (ifindex = 0, next = buf; ifindex < VIR_MCAST_NUM_TOKENS; ifindex++,
|
||||
next = NULL) {
|
||||
token = strtok_r(next, VIR_MCAST_TOKEN_DELIMS, &saveptr);
|
||||
|
||||
if (token == NULL) {
|
||||
virReportSystemError(EINVAL,
|
||||
_("failed to parse multicast address from '%s'"),
|
||||
buf);
|
||||
return -1;
|
||||
}
|
||||
|
||||
switch (ifindex) {
|
||||
case VIR_MCAST_INDEX_TOKEN_IDX:
|
||||
if (virStrToLong_i(token, &endptr, 10, &num) < 0) {
|
||||
virReportSystemError(EINVAL,
|
||||
_("Failed to parse interface index from '%s'"),
|
||||
buf);
|
||||
return -1;
|
||||
|
||||
}
|
||||
mcast->index = num;
|
||||
break;
|
||||
case VIR_MCAST_NAME_TOKEN_IDX:
|
||||
if (virStrncpy(mcast->name, token, strlen(token),
|
||||
VIR_MCAST_NAME_LEN) == NULL) {
|
||||
virReportSystemError(EINVAL,
|
||||
_("Failed to parse network device name from '%s'"),
|
||||
buf);
|
||||
return -1;
|
||||
}
|
||||
break;
|
||||
case VIR_MCAST_USERS_TOKEN_IDX:
|
||||
if (virStrToLong_i(token, &endptr, 10, &num) < 0) {
|
||||
virReportSystemError(EINVAL,
|
||||
_("Failed to parse users from '%s'"),
|
||||
buf);
|
||||
return -1;
|
||||
|
||||
}
|
||||
mcast->users = num;
|
||||
break;
|
||||
case VIR_MCAST_GLOBAL_TOKEN_IDX:
|
||||
if (virStrToLong_i(token, &endptr, 10, &num) < 0) {
|
||||
virReportSystemError(EINVAL,
|
||||
_("Failed to parse users from '%s'"),
|
||||
buf);
|
||||
return -1;
|
||||
|
||||
}
|
||||
mcast->global = num;
|
||||
break;
|
||||
case VIR_MCAST_ADDR_TOKEN_IDX:
|
||||
if (virMacAddrParseHex((const char*)token,
|
||||
&mcast->macaddr) < 0) {
|
||||
virReportSystemError(EINVAL,
|
||||
_("Failed to parse MAC address from '%s'"),
|
||||
buf);
|
||||
}
|
||||
break;
|
||||
default:
|
||||
break;
|
||||
}
|
||||
}
|
||||
return 0;
|
||||
}
|
||||
|
||||
|
||||
static void virNetDevMcastListClear(virNetDevMcastListPtr mcast)
|
||||
{
|
||||
size_t i;
|
||||
|
||||
for (i = 0; i < mcast->nentries; i++)
|
||||
VIR_FREE(mcast->entries[i]);
|
||||
VIR_FREE(mcast->entries);
|
||||
mcast->nentries = 0;
|
||||
}
|
||||
|
||||
|
||||
static int virNetDevGetMcastList(const char *ifname,
|
||||
virNetDevMcastListPtr mcast)
|
||||
{
|
||||
char *cur = NULL;
|
||||
char *buf = NULL;
|
||||
char *next = NULL;
|
||||
int ret = -1, len;
|
||||
virNetDevMcastEntryPtr entry = NULL;
|
||||
|
||||
mcast->entries = NULL;
|
||||
mcast->nentries = 0;
|
||||
|
||||
/* Read entire multicast table into memory */
|
||||
if ((len = virFileReadAll(PROC_NET_DEV_MCAST, MAX_MCAST_SIZE, &buf)) <= 0)
|
||||
goto cleanup;
|
||||
|
||||
cur = buf;
|
||||
while (cur) {
|
||||
if (!entry && VIR_ALLOC(entry) < 0)
|
||||
goto cleanup;
|
||||
|
||||
next = strchr(cur, '\n');
|
||||
if (next)
|
||||
next++;
|
||||
if (virNetDevParseMcast(cur, entry))
|
||||
goto cleanup;
|
||||
|
||||
/* Only return global multicast MAC addresses for
|
||||
* specified interface */
|
||||
if (entry->global && STREQ(ifname, entry->name)) {
|
||||
if (VIR_APPEND_ELEMENT(mcast->entries, mcast->nentries, entry))
|
||||
goto cleanup;
|
||||
} else {
|
||||
memset(entry, 0, sizeof(virNetDevMcastEntry));
|
||||
}
|
||||
cur = next && ((next - buf) < len) ? next : NULL;
|
||||
}
|
||||
|
||||
ret = 0;
|
||||
cleanup:
|
||||
if (ret < 0)
|
||||
virNetDevMcastListClear(mcast);
|
||||
|
||||
VIR_FREE(entry);
|
||||
|
||||
return ret;
|
||||
}
|
||||
|
||||
|
||||
VIR_ENUM_IMPL(virNetDevRxFilterMode,
|
||||
VIR_NETDEV_RX_FILTER_MODE_LAST,
|
||||
"none",
|
||||
@ -1949,6 +2210,38 @@ VIR_ENUM_IMPL(virNetDevRxFilterMode,
|
||||
"all");
|
||||
|
||||
|
||||
static int virNetDevGetMulticastTable(const char *ifname,
|
||||
virNetDevRxFilterPtr filter)
|
||||
{
|
||||
size_t i;
|
||||
int ret = -1;
|
||||
virNetDevMcastList mcast;
|
||||
filter->multicast.nTable = 0;
|
||||
filter->multicast.table = NULL;
|
||||
|
||||
if (virNetDevGetMcastList(ifname, &mcast) < 0)
|
||||
goto cleanup;
|
||||
|
||||
if (mcast.nentries > 0) {
|
||||
if (VIR_ALLOC_N(filter->multicast.table, mcast.nentries) < 0)
|
||||
goto cleanup;
|
||||
|
||||
for (i = 0; i < mcast.nentries; i++) {
|
||||
virMacAddrSet(&filter->multicast.table[i],
|
||||
&mcast.entries[i]->macaddr);
|
||||
}
|
||||
|
||||
filter->multicast.nTable = mcast.nentries;
|
||||
}
|
||||
|
||||
ret = 0;
|
||||
cleanup:
|
||||
virNetDevMcastListClear(&mcast);
|
||||
|
||||
return ret;
|
||||
}
|
||||
|
||||
|
||||
virNetDevRxFilterPtr
|
||||
virNetDevRxFilterNew(void)
|
||||
{
|
||||
@ -1971,3 +2264,39 @@ virNetDevRxFilterFree(virNetDevRxFilterPtr filter)
|
||||
VIR_FREE(filter);
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
/**
|
||||
* virNetDevGetRxFilter:
|
||||
* This function supplies the RX filter list for a given device interface
|
||||
*
|
||||
* @ifname: Name of the interface
|
||||
* @filter: The RX filter list
|
||||
*
|
||||
* Returns 0 or -1 on failure.
|
||||
*/
|
||||
int virNetDevGetRxFilter(const char *ifname,
|
||||
virNetDevRxFilterPtr *filter)
|
||||
{
|
||||
int ret = -1;
|
||||
virNetDevRxFilterPtr fil = virNetDevRxFilterNew();
|
||||
|
||||
if (!fil)
|
||||
goto cleanup;
|
||||
|
||||
if (virNetDevGetMAC(ifname, &fil->mac))
|
||||
goto cleanup;
|
||||
|
||||
if (virNetDevGetMulticastTable(ifname, fil))
|
||||
goto cleanup;
|
||||
|
||||
ret = 0;
|
||||
cleanup:
|
||||
if (ret < 0) {
|
||||
virNetDevRxFilterFree(fil);
|
||||
fil = NULL;
|
||||
}
|
||||
|
||||
*filter = fil;
|
||||
return ret;
|
||||
}
|
||||
|
@ -189,5 +189,15 @@ int virNetDevGetLinkInfo(const char *ifname,
|
||||
virNetDevRxFilterPtr virNetDevRxFilterNew(void)
|
||||
ATTRIBUTE_RETURN_CHECK;
|
||||
void virNetDevRxFilterFree(virNetDevRxFilterPtr filter);
|
||||
int virNetDevGetRxFilter(const char *ifname,
|
||||
virNetDevRxFilterPtr *filter)
|
||||
ATTRIBUTE_NONNULL(1) ATTRIBUTE_NONNULL(2) ATTRIBUTE_RETURN_CHECK;
|
||||
|
||||
int virNetDevAddMulti(const char *ifname,
|
||||
virMacAddrPtr macaddr)
|
||||
ATTRIBUTE_NONNULL(1) ATTRIBUTE_NONNULL(2) ATTRIBUTE_RETURN_CHECK;
|
||||
int virNetDevDelMulti(const char *ifname,
|
||||
virMacAddrPtr macaddr)
|
||||
ATTRIBUTE_NONNULL(1) ATTRIBUTE_NONNULL(2) ATTRIBUTE_RETURN_CHECK;
|
||||
|
||||
#endif /* __VIR_NETDEV_H__ */
|
||||
|
Loading…
Reference in New Issue
Block a user