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a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1718188288; 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=DmRjGkec5AQak3tkZGIfjOKHREJa+4cUg/lOQVI1uqU=; b=Ks6ANVWov6q2ygX1tEzJsBOJR09X2cDWO4YMpHvmdCSan/o6SVDHgikGCp/fE3xjldEeCe MTEMBvWjHJpXT2Fa3pnWZvCWDW9+Krl9vYPMBE9DD6geoBlPuoznk9jJ/0eqKzz7OfGG9/ Tffwe/2X96i8hblHk/pjxr4ovvVFD08= X-MC-Unique: o0OSkNHoPU6p0Qf0BRk6eA-1 From: Dehan Meng To: qemu-devel@nongnu.org Cc: demeng@redhat.com, kkostiuk@redhat.com, michael.roth@amd.com Subject: [PATCH v5 1/1] qga/linux: Add new api 'guest-network-get-route' Date: Wed, 12 Jun 2024 18:31:05 +0800 Message-Id: <20240612103105.301456-2-demeng@redhat.com> In-Reply-To: <20240612103105.301456-1-demeng@redhat.com> References: <20240612103105.301456-1-demeng@redhat.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-Scanned-By: MIMEDefang 3.0 on 10.30.177.12 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 | 81 ++++++++++++++++++++++++++++++++++++++++++++ qga/commands-win32.c | 6 ++++ qga/qapi-schema.json | 56 ++++++++++++++++++++++++++++++ 3 files changed, 143 insertions(+) diff --git a/qga/commands-posix.c b/qga/commands-posix.c index 7f05996495..b1f65716e9 100644 --- a/qga/commands-posix.c +++ b/qga/commands-posix.c @@ -2708,6 +2708,81 @@ GuestCpuStatsList *qmp_guest_get_cpustats(Error **er= rp) return head; } =20 +static char *hexToIPAddress(unsigned int hexValue) +{ + unsigned int byte1 =3D (hexValue >> 24) & 0xFF; + unsigned int byte2 =3D (hexValue >> 16) & 0xFF; + unsigned int byte3 =3D (hexValue >> 8) & 0xFF; + unsigned int byte4 =3D hexValue & 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 *routeFile =3D "/proc/net/route"; + FILE *fp; + size_t n; + char *line =3D NULL; + int firstLine =3D 1; + + fp =3D fopen(routeFile, "r"); + if (fp =3D=3D NULL) { + error_setg_errno(errp, errno, "open(\"%s\")", routeFile); + free(line); + return NULL; + } + + while (getline(&line, &n, fp) !=3D -1) { + if (firstLine) { + firstLine =3D 0; + continue; + } + GuestNetworkRoute *route =3D NULL; + GuestNetworkRoute *networkroute; + int i; + char Iface[IFNAMSIZ]; + unsigned int Destination, Gateway, Mask, Flags; + int RefCnt, Use, Metric, MTU, Window, IRTT; + + /* Parse the line and extract the values */ + i =3D (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=3D 11); + if (i =3D=3D EOF) { + continue; + } + + route =3D g_new0(GuestNetworkRoute, 1); + + networkroute =3D route; + networkroute->iface =3D g_strdup(Iface); + networkroute->destination =3D hexToIPAddress(Destination); + networkroute->gateway =3D hexToIPAddress(Gateway); + networkroute->mask =3D hexToIPAddress(Mask); + 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; + + QAPI_LIST_APPEND(tail, route); + } + + free(line); + fclose(fp); + return head; +} + #else /* defined(__linux__) */ =20 void qmp_guest_suspend_disk(Error **errp) @@ -3079,6 +3154,12 @@ 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..58f51aecbb 100644 --- a/qga/qapi-schema.json +++ b/qga/qapi-schema.json @@ -1800,3 +1800,59 @@ { '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 +# +# @gateway: The IP address of the next hop router +# +# @mask: Subnet Mask +# +# @metric: Route metric +# +# @flags: Route flags (not for windows) +# +# @irtt: Initial round-trip delay (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) +# +# @mtu: Data link layer maximum packet size (not for windows) +# +# Since: 9.1 + +## +{ 'struct': 'GuestNetworkRoute', + 'data': {'iface': 'str', + 'destination': 'str', + 'gateway': 'str', + 'metric': 'int', + 'mask': 'str', + '*irtt': 'int', + '*flags': 'uint64', + '*refcnt': 'int', + '*use': 'int', + '*window': 'int', + '*mtu': '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