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From eb3be709aece2325f7eafc113120cf5ef8f077de Mon Sep 17 00:00:00 2001
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From: Phil Sutter <psutter@redhat.com>
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Date: Mon, 11 Mar 2019 16:28:41 +0100
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Subject: [PATCH] ip-link: Fix listing of alias interfaces
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Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=1673226
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Upstream Status: RHEL-only
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Conflicts: Context change due to missing commit 260137e24d3b7
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("iplink: Remove flags argument from iplink_get")
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Upstream rejected this patch as the alias notation is neither required
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nor wanted by iproute2[1]. With iproute rebase in RHEL7.5 though, we
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changed existing behaviour by accident. Therefore we will carry this
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patch for RHEL7 lifetime.
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[1] https://marc.info/?l=linux-netdev&m=154964861913609&w=2
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commit a1259acb3c2037f464e31fad1f21556f8bf58c91
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Author: Phil Sutter <phil@nwl.cc>
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Date: Thu Feb 7 10:18:16 2019 +0100
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ip-link: Fix listing of alias interfaces
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Commit 50b9950dd9011 ("link dump filter") accidentally broke listing of
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links in the old alias interface notation:
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| % ip link show eth0:1
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| RTNETLINK answers: No such device
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| Cannot send link get request: No such device
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Prior to the above commit, link lookup was performed via ifindex
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returned by if_nametoindex(). The latter uses SIOCGIFINDEX ioctl call
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which on kernel side causes the colon-suffix to be dropped before doing
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the interface lookup. Netlink API though doesn't care about that at all.
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To keep things backward compatible, mimick ioctl API behaviour and drop
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the colon-suffix prior to sending the RTM_GETLINK request.
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Fixes: 50b9950dd9011 ("link dump filter")
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---
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ip/ipaddress.c | 1 +
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1 file changed, 1 insertion(+)
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diff --git a/ip/ipaddress.c b/ip/ipaddress.c
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index 7492075687a9e..14e9e224dfa87 100644
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--- a/ip/ipaddress.c
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+++ b/ip/ipaddress.c
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@@ -1707,6 +1707,7 @@ static int ipaddr_list_flush_or_save(int argc, char **argv, int action)
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* the link device
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*/
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if (filter_dev && filter.group == -1 && do_link == 1) {
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+ *strchrnul(filter_dev, ':') = '\0';
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if (iplink_get(0, filter_dev, RTEXT_FILTER_VF) < 0) {
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perror("Cannot send link get request");
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exit(1);
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--
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2.21.0
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