[PATCH] ip-nexthop: support flush by id

[Chunmei Xu]

add id to struct filter to record the 'id',
filter id only when id is set, otherwise flush all. 

Signed-off-by: Chunmei Xu <xuchun...@linux.alibaba.com>
---
 ip/ipnexthop.c | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/ip/ipnexthop.c b/ip/ipnexthop.c
index 22c66491..fd759140 100644
--- a/ip/ipnexthop.c
+++ b/ip/ipnexthop.c
@@ -21,6 +21,7 @@ static struct {
        unsigned int master;
        unsigned int proto;
        unsigned int fdb;
+       unsigned int id;
 } filter;
 
 enum {
@@ -124,6 +125,9 @@ static int flush_nexthop(struct nlmsghdr *nlh, void *arg)
        if (tb[NHA_ID])
                id = rta_getattr_u32(tb[NHA_ID]);
 
+       if (filter.id && filter.id != id)
+               return 0;
+
        if (id && !delete_nexthop(id))
                filter.flushed++;
 
@@ -491,7 +495,10 @@ static int ipnh_list_flush(int argc, char **argv, int 
action)
                        NEXT_ARG();
                        if (get_unsigned(&id, *argv, 0))
                                invarg("invalid id value", *argv);
-                       return ipnh_get_id(id);
+                       if (action == IPNH_FLUSH)
+                               filter.id = id;
+                       else
+                               return ipnh_get_id(id);
                } else if (!matches(*argv, "protocol")) {
                        __u32 proto;
 
-- 
2.27.0