[PATCH iproute2-next 3/5] bridge: Update fdb show to use rtnl_neighdump_req

[David Ahern]

From: David Ahern <dsah...@gmail.com>

Add fdb_dump_filter to set filter attributes in dump request
and convert fdb_show to use rtnl_neighdump_req.

Signed-off-by: David Ahern <dsah...@gmail.com>
---
 bridge/fdb.c | 37 ++++++++++++++++++++++---------------
 1 file changed, 22 insertions(+), 15 deletions(-)

diff --git a/bridge/fdb.c b/bridge/fdb.c
index a7a0d8052307..676267e15ddc 100644
--- a/bridge/fdb.c
+++ b/bridge/fdb.c
@@ -30,7 +30,7 @@
 #include "rt_names.h"
 #include "utils.h"
 
-static unsigned int filter_index, filter_vlan, filter_state;
+static unsigned int filter_index, filter_vlan, filter_state, filter_master;
 
 static void usage(void)
 {
@@ -256,20 +256,29 @@ int print_fdb(struct nlmsghdr *n, void *arg)
        return 0;
 }
 
-static int fdb_show(int argc, char **argv)
+static int fdb_dump_filter(struct nlmsghdr *nlh, int reqlen)
 {
-       struct {
-               struct nlmsghdr n;
-               struct ndmsg            ndm;
-               char                    buf[256];
-       } req = {
-               .n.nlmsg_len = NLMSG_LENGTH(sizeof(struct ndmsg)),
-               .ndm.ndm_family = PF_BRIDGE,
-       };
+       int err;
+
+       if (filter_index) {
+               struct ndmsg *ndm = NLMSG_DATA(nlh);
 
+               ndm->ndm_ifindex = filter_index;
+       }
+
+       if (filter_master) {
+               err = addattr32(nlh, reqlen, NDA_MASTER, filter_master);
+               if (err)
+                       return err;
+       }
+
+       return 0;
+}
+
+static int fdb_show(int argc, char **argv)
+{
        char *filter_dev = NULL;
        char *br = NULL;
-       int msg_size = sizeof(struct ndmsg);
 
        while (argc > 0) {
                if ((strcmp(*argv, "brport") == 0) || strcmp(*argv, "dev") == 
0) {
@@ -304,8 +313,7 @@ static int fdb_show(int argc, char **argv)
                        fprintf(stderr, "Cannot find bridge device \"%s\"\n", 
br);
                        return -1;
                }
-               addattr32(&req.n, sizeof(req), IFLA_MASTER, br_ifindex);
-               msg_size += RTA_LENGTH(4);
+               filter_master = br_ifindex;
        }
 
        /*we'll keep around filter_dev for older kernels */
@@ -313,10 +321,9 @@ static int fdb_show(int argc, char **argv)
                filter_index = ll_name_to_index(filter_dev);
                if (!filter_index)
                        return nodev(filter_dev);
-               req.ndm.ndm_ifindex = filter_index;
        }
 
-       if (rtnl_dump_request(&rth, RTM_GETNEIGH, &req.ndm, msg_size) < 0) {
+       if (rtnl_neighdump_req(&rth, PF_BRIDGE, fdb_dump_filter) < 0) {
                perror("Cannot send dump request");
                exit(1);
        }
-- 
2.11.0