[LTP] [RFC PATCH 0/2] tst_net.sh: Fix for disabled IPv6

[LTP] [RFC PATCH 0/2] tst_net.sh: Fix for disabled IPv6

[Petr Vorel]

Hi,

not elegant, but working.
Meant to be merged after release.

We could allow user to disable IPv6 even supported with variable
(might be useful for debugging).

Kind regards,
Petr

Petr Vorel (2):
  tst_net.sh: Fix for disabled IPv6
  broken_ip-nexthdr.sh: Check IPv6 support before forcing it

 testcases/lib/tst_net.sh                      | 66 +++++++++++++++----
 .../stress/broken_ip/broken_ip-nexthdr.sh     |  1 +
 2 files changed, 56 insertions(+), 11 deletions(-)

-- 
2.34.1


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[LTP] [RFC PATCH 1/2] tst_net.sh: Fix for disabled IPv6

[Petr Vorel]

Tests failed in tst_init_iface even IPv4 only test was run.
Allow to init interfaces at least for IPv4.

Tests which use TST_IPV6=6 needs to be fixed (unless they use
just tst_ipaddr_un()).

Signed-off-by: Petr Vorel <pvorel@suse.cz>
---
 testcases/lib/tst_net.sh | 66 +++++++++++++++++++++++++++++++++-------
 1 file changed, 55 insertions(+), 11 deletions(-)

diff --git a/testcases/lib/tst_net.sh b/testcases/lib/tst_net.sh
index 4dc0fca926..df16e12a26 100644
--- a/testcases/lib/tst_net.sh
+++ b/testcases/lib/tst_net.sh
@@ -24,7 +24,9 @@ TST_IPV6_FLAG=${TST_IPV6_FLAG:-}
 tst_net_parse_args()
 {
 	case $1 in
-	6) TST_IPV6=6 TST_IPVER=6 TST_IPV6_FLAG="-6";;
+	6)  tst_net_require_ipv6
+		TST_IPV6=6 TST_IPVER=6 TST_IPV6_FLAG="-6"
+		;;
 	*) [ "$TST_PARSE_ARGS_CALLER" ] && $TST_PARSE_ARGS_CALLER "$1" "$2";;
 	esac
 }
@@ -100,6 +102,30 @@ tst_brk_()
 	[ -z "$TST_USE_LEGACY_API" ] && tst_brk $@ || tst_brkm $@
 }
 
+tst_net_detect_ipv6()
+{
+	local type="${1:-lhost}"
+	local cmd='[ -f /proc/net/if_inet6 ]'
+
+	if [ "$type" = "lhost" ]; then
+		$cmd
+		return $?
+	fi
+
+	tst_rhost_run -c "$cmd"
+	return $?
+}
+
+tst_net_require_ipv6()
+{
+	local err="IPv6 not supported on:"
+	local missing
+
+	tst_net_detect_ipv6 || missing=" lhost"
+	tst_net_detect_ipv6 rhost || missing="$missing rhost"
+	[ -z "$missing" ] || tst_brk_ TCONF "$err$missing"
+}
+
 init_ltp_netspace()
 {
 	local pid
@@ -517,7 +543,9 @@ tst_init_iface()
 		ip link set $iface down || return $?
 		ip route flush dev $iface || return $?
 		ip addr flush dev $iface || return $?
-		sysctl -qw net.ipv6.conf.$iface.accept_dad=0 || return $?
+		if tst_net_detect_ipv6; then
+			sysctl -qw net.ipv6.conf.$iface.accept_dad=0 || return $?
+		fi
 		ip link set $iface up
 		return $?
 	fi
@@ -529,7 +557,9 @@ tst_init_iface()
 	tst_rhost_run -c "ip link set $iface down" || return $?
 	tst_rhost_run -c "ip route flush dev $iface" || return $?
 	tst_rhost_run -c "ip addr flush dev $iface" || return $?
-	tst_rhost_run -c "sysctl -qw net.ipv6.conf.$iface.accept_dad=0" || return $?
+	if tst_net_detect_ipv6 rhost; then
+		tst_rhost_run -c "sysctl -qw net.ipv6.conf.$iface.accept_dad=0" || return $?
+	fi
 	tst_rhost_run -c "ip link set $iface up"
 }
 
@@ -606,7 +636,9 @@ tst_restore_ipaddr()
 	local ret=0
 	local backup_tst_ipv6=$TST_IPV6
 	TST_IPV6= tst_add_ipaddr $type $link_num || ret=$?
-	TST_IPV6=6 tst_add_ipaddr $type $link_num || ret=$?
+	if tst_net_detect_ipv6; then
+		TST_IPV6=6 tst_add_ipaddr $type $link_num || ret=$?
+	fi
 	TST_IPV6=$backup_tst_ipv6
 
 	return $ret
@@ -971,8 +1003,10 @@ IPV6_RHOST="${IPV6_RHOST:-fd00:1:1:1::1/64}"
 if [ -z "$_tst_net_parse_variables" ]; then
 	eval $(tst_net_ip_prefix $IPV4_LHOST || echo "exit $?")
 	eval $(tst_net_ip_prefix -r $IPV4_RHOST || echo "exit $?")
-	eval $(tst_net_ip_prefix $IPV6_LHOST || echo "exit $?")
-	eval $(tst_net_ip_prefix -r $IPV6_RHOST || echo "exit $?")
+	if tst_net_detect_ipv6; then
+		eval $(tst_net_ip_prefix $IPV6_LHOST || echo "exit $?")
+		eval $(tst_net_ip_prefix -r $IPV6_RHOST || echo "exit $?")
+	fi
 fi
 
 [ -n "$TST_USE_NETNS" -a "$TST_INIT_NETNS" != "no" ] && init_ltp_netspace
@@ -981,19 +1015,29 @@ if [ -z "$_tst_net_parse_variables" ]; then
 	eval $(tst_net_iface_prefix $IPV4_LHOST || echo "exit $?")
 	eval $(tst_rhost_run -c 'tst_net_iface_prefix -r '$IPV4_RHOST \
 		|| echo "exit $?")
-	eval $(tst_net_iface_prefix $IPV6_LHOST || echo "exit $?")
-	eval $(tst_rhost_run -c 'tst_net_iface_prefix -r '$IPV6_RHOST \
-		|| echo "exit $?")
+
+	if tst_net_detect_ipv6; then
+		eval $(tst_net_iface_prefix $IPV6_LHOST || echo "exit $?")
+	fi
+
+	if tst_net_detect_ipv6 rhost; then
+		eval $(tst_rhost_run -c 'tst_net_iface_prefix -r '$IPV6_RHOST \
+			|| echo "exit $?")
+	fi
 
 	eval $(tst_net_vars $IPV4_LHOST/$IPV4_LPREFIX \
 		$IPV4_RHOST/$IPV4_RPREFIX || echo "exit $?")
-	eval $(tst_net_vars $IPV6_LHOST/$IPV6_LPREFIX \
-		$IPV6_RHOST/$IPV6_RPREFIX || echo "exit $?")
+
+	if tst_net_detect_ipv6; then
+		eval $(tst_net_vars $IPV6_LHOST/$IPV6_LPREFIX \
+			$IPV6_RHOST/$IPV6_RPREFIX || echo "exit $?")
+	fi
 
 	tst_res_ TINFO "Network config (local -- remote):"
 	tst_res_ TINFO "$LHOST_IFACES -- $RHOST_IFACES"
 	tst_res_ TINFO "$IPV4_LHOST/$IPV4_LPREFIX -- $IPV4_RHOST/$IPV4_RPREFIX"
 	tst_res_ TINFO "$IPV6_LHOST/$IPV6_LPREFIX -- $IPV6_RHOST/$IPV6_RPREFIX"
+
 	export _tst_net_parse_variables="yes"
 fi
 
-- 
2.34.1


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[LTP] [RFC PATCH 2/2] broken_ip-nexthdr.sh: Check IPv6 support before forcing it

[Petr Vorel]

Signed-off-by: Petr Vorel <pvorel@suse.cz>
---
 testcases/network/stress/broken_ip/broken_ip-nexthdr.sh | 1 +
 1 file changed, 1 insertion(+)

diff --git a/testcases/network/stress/broken_ip/broken_ip-nexthdr.sh b/testcases/network/stress/broken_ip/broken_ip-nexthdr.sh
index ec6643af66..cb4a3dd399 100755
--- a/testcases/network/stress/broken_ip/broken_ip-nexthdr.sh
+++ b/testcases/network/stress/broken_ip/broken_ip-nexthdr.sh
@@ -11,6 +11,7 @@ TST_TESTFUNC="do_test"
 do_test()
 {
 	# not supported on IPv4
+	tst_net_require_ipv6
 	TST_IPV6=6
 	TST_IPVER=6
 
-- 
2.34.1


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Re: [LTP] [RFC PATCH 1/2] tst_net.sh: Fix for disabled IPv6

[Martin Doucha]

Hi,

On 19. 01. 22 20:55, Petr Vorel wrote:
> Tests failed in tst_init_iface even IPv4 only test was run.
> Allow to init interfaces at least for IPv4.
> 
> Tests which use TST_IPV6=6 needs to be fixed (unless they use
> just tst_ipaddr_un()).
> 
> Signed-off-by: Petr Vorel <pvorel@suse.cz>
> ---
>  testcases/lib/tst_net.sh | 66 +++++++++++++++++++++++++++++++++-------
>  1 file changed, 55 insertions(+), 11 deletions(-)
> 
> diff --git a/testcases/lib/tst_net.sh b/testcases/lib/tst_net.sh
> index 4dc0fca926..df16e12a26 100644
> --- a/testcases/lib/tst_net.sh
> +++ b/testcases/lib/tst_net.sh
> @@ -24,7 +24,9 @@ TST_IPV6_FLAG=${TST_IPV6_FLAG:-}
>  tst_net_parse_args()
>  {
>  	case $1 in
> -	6) TST_IPV6=6 TST_IPVER=6 TST_IPV6_FLAG="-6";;
> +	6)  tst_net_require_ipv6
> +		TST_IPV6=6 TST_IPVER=6 TST_IPV6_FLAG="-6"
> +		;;
>  	*) [ "$TST_PARSE_ARGS_CALLER" ] && $TST_PARSE_ARGS_CALLER "$1" "$2";;
>  	esac
>  }
> @@ -100,6 +102,30 @@ tst_brk_()
>  	[ -z "$TST_USE_LEGACY_API" ] && tst_brk $@ || tst_brkm $@
>  }
>  
> +tst_net_detect_ipv6()
> +{
> +	local type="${1:-lhost}"
> +	local cmd='[ -f /proc/net/if_inet6 ]'
> +
> +	if [ "$type" = "lhost" ]; then
> +		$cmd
> +		return $?
> +	fi
> +
> +	tst_rhost_run -c "$cmd"
> +	return $?
> +}

tst_net_detect_ipv6() should probably run each check only once and cache
the result. The function is called multiple times and tst_rhost_run()
could be quite slow if the remote side is on a different physical machine.

-- 
Martin Doucha   mdoucha@suse.cz
QA Engineer for Software Maintenance
SUSE LINUX, s.r.o.
CORSO IIa
Krizikova 148/34
186 00 Prague 8
Czech Republic

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Re: [LTP] [RFC PATCH 1/2] tst_net.sh: Fix for disabled IPv6

[Petr Vorel]

Hi Martin,

> tst_net_detect_ipv6() should probably run each check only once and cache
> the result. The function is called multiple times and tst_rhost_run()
> could be quite slow if the remote side is on a different physical machine.
You're right, ssh result needs to be cached. Thanks for a review!

Kind regards,
Petr

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