[PATCH iproute2] ip rule: Honor filter arguments on flush

[David Ahern <dsahern@kernel.org>]

From: David Ahern <dsahern@gmail.com>

'ip ru flush' currently removes all rules with priority > 0 regardless
of any other command line arguments passed in. Update flush_rule to
call filter_nlmsg to determine if the rule should be flushed or not.
This enables rule flushing such as 'ip ru flush table 1001' and
'ip ru flush pref 99'.

Signed-off-by: David Ahern <dsahern@gmail.com>
---
 ip/iprule.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/ip/iprule.c b/ip/iprule.c
index b465a80785b1..a85a43904e6e 100644
--- a/ip/iprule.c
+++ b/ip/iprule.c
@@ -461,6 +461,7 @@ static int flush_rule(struct nlmsghdr *n, void *arg)
 	struct fib_rule_hdr *frh = NLMSG_DATA(n);
 	int len = n->nlmsg_len;
 	struct rtattr *tb[FRA_MAX+1];
+	int host_len = -1;
 
 	len -= NLMSG_LENGTH(sizeof(*frh));
 	if (len < 0)
@@ -468,6 +469,10 @@ static int flush_rule(struct nlmsghdr *n, void *arg)
 
 	parse_rtattr(tb, FRA_MAX, RTM_RTA(frh), len);
 
+	host_len = af_bit_len(frh->family);
+	if (!filter_nlmsg(n, tb, host_len))
+		return 0;
+
 	if (tb[FRA_PROTOCOL]) {
 		__u8 protocol = rta_getattr_u8(tb[FRA_PROTOCOL]);
 
-- 
2.11.0