qga/linux: Add new api 'guest-network-get-route'
The Route information of the Linux VM needs to be used by administrators and users when debugging network problems and troubleshooting. Signed-off-by: Dehan Meng <demeng@redhat.com> Reviewed-by: Konstantin Kostiuk <kkostiuk@redhat.com> Message-ID: <20240613092802.346246-2-demeng@redhat.com> Signed-off-by: Konstantin Kostiuk <kkostiuk@redhat.com>
This commit is contained in:
Dehan Meng
Konstantin Kostiuk
parent
ce22616181
commit
8e326d36dd
@ -28,6 +28,10 @@
|
||||
#include <libudev.h>
|
||||
#endif
|
||||
|
||||
#ifdef HAVE_GETIFADDRS
|
||||
#include <net/if.h>
|
||||
#endif
|
||||
|
||||
#include <sys/statvfs.h>
|
||||
|
||||
#if defined(CONFIG_FSFREEZE) || defined(CONFIG_FSTRIM)
|
||||
@ -2089,3 +2093,132 @@ GuestCpuStatsList *qmp_guest_get_cpustats(Error **errp)
|
||||
fclose(fp);
|
||||
return head;
|
||||
}
|
||||
|
||||
static char *hexToIPAddress(const void *hexValue, int is_ipv6)
|
||||
{
|
||||
if (is_ipv6) {
|
||||
char addr[INET6_ADDRSTRLEN];
|
||||
struct in6_addr in6;
|
||||
const char *hexStr = (const char *)hexValue;
|
||||
int i;
|
||||
|
||||
for (i = 0; i < 16; i++) {
|
||||
sscanf(&hexStr[i * 2], "%02hhx", &in6.s6_addr[i]);
|
||||
}
|
||||
inet_ntop(AF_INET6, &in6, addr, INET6_ADDRSTRLEN);
|
||||
|
||||
return g_strdup(addr);
|
||||
} else {
|
||||
unsigned int hexInt = *(unsigned int *)hexValue;
|
||||
unsigned int byte1 = (hexInt >> 24) & 0xFF;
|
||||
unsigned int byte2 = (hexInt >> 16) & 0xFF;
|
||||
unsigned int byte3 = (hexInt >> 8) & 0xFF;
|
||||
unsigned int byte4 = hexInt & 0xFF;
|
||||
|
||||
return g_strdup_printf("%u.%u.%u.%u", byte4, byte3, byte2, byte1);
|
||||
}
|
||||
}
|
||||
|
||||
GuestNetworkRouteList *qmp_guest_network_get_route(Error **errp)
|
||||
{
|
||||
GuestNetworkRouteList *head = NULL, **tail = &head;
|
||||
const char *routeFiles[] = {"/proc/net/route", "/proc/net/ipv6_route"};
|
||||
FILE *fp;
|
||||
size_t n;
|
||||
char *line = NULL;
|
||||
int firstLine;
|
||||
int is_ipv6;
|
||||
int i;
|
||||
|
||||
for (i = 0; i < 2; i++) {
|
||||
firstLine = 1;
|
||||
is_ipv6 = (i == 1);
|
||||
fp = fopen(routeFiles[i], "r");
|
||||
if (fp == NULL) {
|
||||
error_setg_errno(errp, errno, "open(\"%s\")", routeFiles[i]);
|
||||
free(line);
|
||||
continue;
|
||||
}
|
||||
|
||||
while (getline(&line, &n, fp) != -1) {
|
||||
if (firstLine && !is_ipv6) {
|
||||
firstLine = 0;
|
||||
continue;
|
||||
}
|
||||
GuestNetworkRoute *route = NULL;
|
||||
GuestNetworkRoute *networkroute;
|
||||
char Iface[IFNAMSIZ];
|
||||
if (is_ipv6) {
|
||||
char Destination[33], Source[33], NextHop[33];
|
||||
int DesPrefixlen, SrcPrefixlen, Metric, RefCnt, Use, Flags;
|
||||
|
||||
/* Parse the line and extract the values */
|
||||
if (sscanf(line, "%32s %x %32s %x %32s %x %x %x %x %s",
|
||||
Destination, &DesPrefixlen, Source,
|
||||
&SrcPrefixlen, NextHop, &Metric, &RefCnt,
|
||||
&Use, &Flags, Iface) != 10) {
|
||||
continue;
|
||||
}
|
||||
|
||||
route = g_new0(GuestNetworkRoute, 1);
|
||||
networkroute = route;
|
||||
networkroute->iface = g_strdup(Iface);
|
||||
networkroute->destination = hexToIPAddress(Destination, 1);
|
||||
networkroute->metric = Metric;
|
||||
networkroute->source = hexToIPAddress(Source, 1);
|
||||
networkroute->desprefixlen = g_strdup_printf(
|
||||
"%d", DesPrefixlen
|
||||
);
|
||||
networkroute->srcprefixlen = g_strdup_printf(
|
||||
"%d", SrcPrefixlen
|
||||
);
|
||||
networkroute->nexthop = hexToIPAddress(NextHop, 1);
|
||||
networkroute->has_flags = true;
|
||||
networkroute->flags = Flags;
|
||||
networkroute->has_refcnt = true;
|
||||
networkroute->refcnt = RefCnt;
|
||||
networkroute->has_use = true;
|
||||
networkroute->use = Use;
|
||||
networkroute->version = 6;
|
||||
} else {
|
||||
unsigned int Destination, Gateway, Mask, Flags;
|
||||
int RefCnt, Use, Metric, MTU, Window, IRTT;
|
||||
|
||||
/* Parse the line and extract the values */
|
||||
if (sscanf(line, "%s %X %X %x %d %d %d %X %d %d %d",
|
||||
Iface, &Destination, &Gateway, &Flags, &RefCnt,
|
||||
&Use, &Metric, &Mask, &MTU, &Window, &IRTT) != 11) {
|
||||
continue;
|
||||
}
|
||||
|
||||
route = g_new0(GuestNetworkRoute, 1);
|
||||
networkroute = route;
|
||||
networkroute->iface = g_strdup(Iface);
|
||||
networkroute->destination = hexToIPAddress(&Destination, 0);
|
||||
networkroute->gateway = hexToIPAddress(&Gateway, 0);
|
||||
networkroute->mask = hexToIPAddress(&Mask, 0);
|
||||
networkroute->metric = Metric;
|
||||
networkroute->has_flags = true;
|
||||
networkroute->flags = Flags;
|
||||
networkroute->has_refcnt = true;
|
||||
networkroute->refcnt = RefCnt;
|
||||
networkroute->has_use = true;
|
||||
networkroute->use = Use;
|
||||
networkroute->has_mtu = true;
|
||||
networkroute->mtu = MTU;
|
||||
networkroute->has_window = true;
|
||||
networkroute->window = Window;
|
||||
networkroute->has_irtt = true;
|
||||
networkroute->irtt = IRTT;
|
||||
networkroute->version = 4;
|
||||
}
|
||||
|
||||
QAPI_LIST_APPEND(tail, route);
|
||||
}
|
||||
|
||||
free(line);
|
||||
fclose(fp);
|
||||
}
|
||||
|
||||
return head;
|
||||
}
|
||||
|
||||
@ -1851,3 +1851,76 @@
|
||||
'returns': ['GuestCpuStats'],
|
||||
'if': 'CONFIG_LINUX'
|
||||
}
|
||||
|
||||
##
|
||||
# @GuestNetworkRoute:
|
||||
#
|
||||
# Route information, currently, only linux supported.
|
||||
#
|
||||
# @iface: The destination network or host's egress network interface in the routing table
|
||||
#
|
||||
# @destination: The IP address of the target network or host, The final destination of the packet
|
||||
#
|
||||
# @metric: Route metric
|
||||
#
|
||||
# @gateway: The IP address of the next hop router
|
||||
#
|
||||
# @mask: Subnet Mask (IPv4 only)
|
||||
#
|
||||
# @irtt: Initial round-trip delay (not for windows, IPv4 only)
|
||||
#
|
||||
# @flags: Route flags (not for windows)
|
||||
#
|
||||
# @refcnt: The route's reference count (not for windows)
|
||||
#
|
||||
# @use: Route usage count (not for windows)
|
||||
#
|
||||
# @window: TCP window size, used for flow control (not for windows, IPv4 only)
|
||||
#
|
||||
# @mtu: Data link layer maximum packet size (not for windows)
|
||||
#
|
||||
# @desprefixlen: Destination prefix length (for IPv6)
|
||||
#
|
||||
# @source: Source IP address (for IPv6)
|
||||
#
|
||||
# @srcprefixlen: Source prefix length (for IPv6)
|
||||
#
|
||||
# @nexthop: Next hop IP address (for IPv6)
|
||||
#
|
||||
# @version: IP version (4 or 6)
|
||||
#
|
||||
# Since: 9.1
|
||||
|
||||
##
|
||||
{ 'struct': 'GuestNetworkRoute',
|
||||
'data': {'iface': 'str',
|
||||
'destination': 'str',
|
||||
'metric': 'int',
|
||||
'*gateway': 'str',
|
||||
'*mask': 'str',
|
||||
'*irtt': 'int',
|
||||
'*flags': 'uint64',
|
||||
'*refcnt': 'int',
|
||||
'*use': 'int',
|
||||
'*window': 'int',
|
||||
'*mtu': 'int',
|
||||
'*desprefixlen': 'str',
|
||||
'*source': 'str',
|
||||
'*srcprefixlen': 'str',
|
||||
'*nexthop': 'str',
|
||||
'version': 'int'
|
||||
},
|
||||
'if': 'CONFIG_LINUX' }
|
||||
|
||||
##
|
||||
# @guest-network-get-route:
|
||||
#
|
||||
# Retrieve information about route of network.
|
||||
# Returns: List of route info of guest.
|
||||
#
|
||||
# Since: 9.1
|
||||
##
|
||||
{ 'command': 'guest-network-get-route',
|
||||
'returns': ['GuestNetworkRoute'],
|
||||
'if': 'CONFIG_LINUX'
|
||||
}
|
||||
|
||||
Loading…
Reference in New Issue
Block a user