[PATCH nft] libnftables: got rid of repeated initialization of netlink_ctx variable in loop.

[Jeremy Sowden]

Most members in the context doesn't change, so there is no need to
memset it and reassign most of its members on every iteration.  Moved
that code out of the loop.

Fixes: 49900d448ac9 ("libnftables: Move library stuff out of main.c")
Reported-by: Pablo Neira Ayuso <pa...@netfilter.org>
Signed-off-by: Jeremy Sowden <jer...@azazel.net>
---
 src/libnftables.c | 11 ++++-------
 1 file changed, 4 insertions(+), 7 deletions(-)

diff --git a/src/libnftables.c b/src/libnftables.c
index 2f77a7709e2c..834ea661a146 100644
--- a/src/libnftables.c
+++ b/src/libnftables.c
@@ -23,7 +23,7 @@ static int nft_netlink(struct nft_ctx *nft,
 {
        uint32_t batch_seqnum, seqnum = 0, num_cmds = 0;
        struct nftnl_batch *batch;
-       struct netlink_ctx ctx;
+       struct netlink_ctx ctx = { .msgs = msgs, .nft = nft };
        struct cmd *cmd;
        struct mnl_err *err, *tmp;
        LIST_HEAD(err_list);
@@ -32,16 +32,13 @@ static int nft_netlink(struct nft_ctx *nft,
        if (list_empty(cmds))
                return 0;
 
-       batch = mnl_batch_init();
+       init_list_head(&ctx.list);
+
+       ctx.batch = batch = mnl_batch_init();
 
        batch_seqnum = mnl_batch_begin(batch, mnl_seqnum_alloc(&seqnum));
        list_for_each_entry(cmd, cmds, list) {
-               memset(&ctx, 0, sizeof(ctx));
-               ctx.msgs = msgs;
                ctx.seqnum = cmd->seqnum = mnl_seqnum_alloc(&seqnum);
-               ctx.batch = batch;
-               ctx.nft = nft;
-               init_list_head(&ctx.list);
                ret = do_command(&ctx, cmd);
                if (ret < 0) {
                        netlink_io_error(&ctx, &cmd->location,
-- 
2.20.1