From c560900fc16eeac064cc7c43a96c5343fe68ae76 Mon Sep 17 00:00:00 2001 From: Hangbin Liu Date: Wed, 8 Nov 2017 14:39:11 +0800 Subject: [PATCH] iplink: double the buffer size also in iplink_get() Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=1380803 Upstream Status: iproute2.git commit 460c03f3f3cc commit 460c03f3f3cc436ff4673d75722ba68a6ec9343d Author: Michal Kubecek Date: Fri Sep 1 18:39:16 2017 +0200 iplink: double the buffer size also in iplink_get() Commit 72b365e8e0fd ("libnetlink: Double the dump buffer size") increased the buffer size for "ip link show" command to 32 KB to handle NICs with large number of VFs. With "dev" filter, a different code path is taken and iplink_get() still uses only 16 KB buffer. The size of 32768 is not very future-proof as NICs supporting 120-128 VFs are already in use so that single RTM_NEWLINK message in the dump can exceed 30000 bytes. But it's what rtnl_talk() and rtnl_dump_filter_l() use so let's be consistent. Once this proves insufficient, all three sizes should be increased. Signed-off-by: Michal Kubecek Signed-off-by: Hangbin Liu --- ip/iplink.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/ip/iplink.c b/ip/iplink.c index 2b2421f9a2281..5afbadf0ce383 100644 --- a/ip/iplink.c +++ b/ip/iplink.c @@ -1015,7 +1015,7 @@ int iplink_get(unsigned int flags, char *name, __u32 filt_mask) }; struct { struct nlmsghdr n; - char buf[16384]; + char buf[32768]; } answer; if (name) { -- 2.21.0