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a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1718270900; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=lKLxZBeBJIcBJzDaEw1e6WfhpfHwojzZWNRQlnPXRqE=; b=XBxExOFrPIYZMRYteC+SUpHOPsdRIQSthrhKRlcO+kgIHwnUzuO9PFGRdDFP3BPAAja1rC yKcgoUsJubVx2OUGkqTR499XONweOp08v03ApI44XIKKWOb+uT5SDUEtsGjGVKH6+ZOlgf yKixRyD3t4zggeGUSLeANOfpHDSk1UE= X-MC-Unique: cPxIfpjUNbemElvzXjsESg-1 From: Dehan Meng To: qemu-devel@nongnu.org Cc: demeng@redhat.com, kkostiuk@redhat.com, michael.roth@amd.com Subject: [PATCH v6 1/1] qga/linux: Add new api 'guest-network-get-route' Date: Thu, 13 Jun 2024 17:28:02 +0800 Message-Id: <20240613092802.346246-2-demeng@redhat.com> In-Reply-To: <20240613092802.346246-1-demeng@redhat.com> References: <20240613092802.346246-1-demeng@redhat.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-Scanned-By: MIMEDefang 3.4.1 on 10.30.177.4 Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; 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charset="utf-8" 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 --- qga/commands-posix.c | 135 +++++++++++++++++++++++++++++++++++++++++++ qga/commands-win32.c | 6 ++ qga/qapi-schema.json | 71 +++++++++++++++++++++++ 3 files changed, 212 insertions(+) diff --git a/qga/commands-posix.c b/qga/commands-posix.c index 7f05996495..b85b3937bf 100644 --- a/qga/commands-posix.c +++ b/qga/commands-posix.c @@ -2708,6 +2708,135 @@ GuestCpuStatsList *qmp_guest_get_cpustats(Error **e= rrp) return head; } =20 +static char *hexToIPAddress(const void *hexValue, int is_ipv6) +{ + if (is_ipv6) { + char addr[INET6_ADDRSTRLEN]; + struct in6_addr in6; + const char *hexStr =3D (const char *)hexValue; + int i; + + for (i =3D 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 =3D *(unsigned int *)hexValue; + unsigned int byte1 =3D (hexInt >> 24) & 0xFF; + unsigned int byte2 =3D (hexInt >> 16) & 0xFF; + unsigned int byte3 =3D (hexInt >> 8) & 0xFF; + unsigned int byte4 =3D hexInt & 0xFF; + + return g_strdup_printf("%u.%u.%u.%u", byte4, byte3, byte2, byte1); + } +} + +GuestNetworkRouteList *qmp_guest_network_get_route(Error **errp) +{ + GuestNetworkRouteList *head =3D NULL, **tail =3D &head; + const char *routeFiles[] =3D {"/proc/net/route", "/proc/net/ipv6_route= "}; + FILE *fp; + size_t n; + char *line =3D NULL; + int firstLine; + int is_ipv6; + int i; + + for (i =3D 0; i < 2; i++) { + firstLine =3D 1; + is_ipv6 =3D (i =3D=3D 1); + fp =3D fopen(routeFiles[i], "r"); + if (fp =3D=3D NULL) { + error_setg_errno(errp, errno, "open(\"%s\")", routeFiles[i]); + free(line); + continue; + } + + while (getline(&line, &n, fp) !=3D -1) { + if (firstLine && !is_ipv6) { + firstLine =3D 0; + continue; + } + GuestNetworkRoute *route =3D 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 %32s", + Destination, &DesPrefixlen, Source, + &SrcPrefixlen, NextHop, &Metric, &RefCnt, + &Use, &Flags, Iface) !=3D 10) { + continue; + } + + route =3D g_new0(GuestNetworkRoute, 1); + networkroute =3D route; + networkroute->iface =3D g_strdup(Iface); + networkroute->destination =3D hexToIPAddress(Destination, = 1); + networkroute->metric =3D Metric; + networkroute->source =3D hexToIPAddress(Source, 1); + networkroute->desprefixlen =3D g_strdup_printf( + "%d", DesPrefixlen + ); + networkroute->srcprefixlen =3D g_strdup_printf( + "%d", SrcPrefixlen + ); + networkroute->nexthop =3D hexToIPAddress(NextHop, 1); + networkroute->has_flags =3D true; + networkroute->flags =3D Flags; + networkroute->has_refcnt =3D true; + networkroute->refcnt =3D RefCnt; + networkroute->has_use =3D true; + networkroute->use =3D Use; + networkroute->version =3D 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) != =3D 11) { + continue; + } + + route =3D g_new0(GuestNetworkRoute, 1); + networkroute =3D route; + networkroute->iface =3D g_strdup(Iface); + networkroute->destination =3D hexToIPAddress(&Destination,= 0); + networkroute->gateway =3D hexToIPAddress(&Gateway, 0); + networkroute->mask =3D hexToIPAddress(&Mask, 0); + networkroute->metric =3D Metric; + networkroute->has_flags =3D true; + networkroute->flags =3D Flags; + networkroute->has_refcnt =3D true; + networkroute->refcnt =3D RefCnt; + networkroute->has_use =3D true; + networkroute->use =3D Use; + networkroute->has_mtu =3D true; + networkroute->mtu =3D MTU; + networkroute->has_window =3D true; + networkroute->window =3D Window; + networkroute->has_irtt =3D true; + networkroute->irtt =3D IRTT; + networkroute->version =3D 4; + } + + QAPI_LIST_APPEND(tail, route); + } + + free(line); + fclose(fp); + } + + return head; +} + #else /* defined(__linux__) */ =20 void qmp_guest_suspend_disk(Error **errp) @@ -3079,6 +3208,12 @@ GuestCpuStatsList *qmp_guest_get_cpustats(Error **er= rp) return NULL; } =20 +GuestNetworkRouteList *qmp_guest_network_get_route(Error **errp) +{ + error_setg(errp, QERR_UNSUPPORTED); + return NULL; +} + #endif /* CONFIG_FSFREEZE */ =20 #if !defined(CONFIG_FSTRIM) diff --git a/qga/commands-win32.c b/qga/commands-win32.c index 0d1b836e87..91289bc9ab 100644 --- a/qga/commands-win32.c +++ b/qga/commands-win32.c @@ -2517,3 +2517,9 @@ GuestCpuStatsList *qmp_guest_get_cpustats(Error **err= p) error_setg(errp, QERR_UNSUPPORTED); return NULL; } + +GuestNetworkRouteList *qmp_guest_network_get_route(Error **errp) +{ + error_setg(errp, QERR_UNSUPPORTED); + return NULL; +} diff --git a/qga/qapi-schema.json b/qga/qapi-schema.json index b3de1fb6b3..1c2ee9f3c6 100644 --- a/qga/qapi-schema.json +++ b/qga/qapi-schema.json @@ -1800,3 +1800,74 @@ { 'command': 'guest-get-cpustats', 'returns': ['GuestCpuStats'] } + +## +# @GuestNetworkRoute: +# +# Route information, currently, only linux supported. +# +# @iface: The destination network or host's egress network interface in th= e routing table +# +# @destination: The IP address of the target network or host, The final de= stination 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 o= nly) +# +# @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' + }} + +## +# @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'] +} --=20 2.40.1