From: Petr Machata <petrm@xxxxxxxxxxxx>
In order to run a certain command inside another network namespace, it's
possible to use "ip netns exec ns command". However then one can't use
functions defined in lib.sh or a test suite.
One option is to do "ip netns exec ns bash -c command", provided that
all functions that one wishes to use (and their dependencies) are
published using "export -f". That may not be practical.
Therefore, introduce a helper in_ns(), which wraps a given command in a
boilerplate of "ip netns exec" and "source lib.sh", thus making all
library functions available. (Custom functions that a script wishes to
run within a namespace still need to be exported.)
Because quotes in "$@" aren't recognized in heredoc, hand-expand the
array in an explicit for loop, leveraging printf %q to handle proper
quoting.
Signed-off-by: Petr Machata <petrm@xxxxxxxxxxxx>
Signed-off-by: Ido Schimmel <idosch@xxxxxxxxxxxx>
---
tools/testing/selftests/net/forwarding/lib.sh | 11 +++++++++++
1 file changed, 11 insertions(+)
diff --git a/tools/testing/selftests/net/forwarding/lib.sh b/tools/testing/selftests/net/forwarding/lib.sh
index bb0e9fdf893e..93d6e9df483e 100644
--- a/tools/testing/selftests/net/forwarding/lib.sh
+++ b/tools/testing/selftests/net/forwarding/lib.sh
@@ -783,6 +783,17 @@ multipath_eval()
log_info "Expected ratio $weights_ratio Measured ratio $packets_ratio"
}
+in_ns()
+{
+ local name=$1; shift
+
+ ip netns exec $name bash <<-EOF
+ NUM_NETIFS=0
+ source lib.sh
+ $(for a in "$@"; do printf "%q${IFS:0:1}" "$a"; done)
+ EOF
+}
+
##############################################################################
# Tests
--
2.19.1
