[libnftnl PATCH 2/2] examples: nft-set-parse-add: give batching support

[Arturo Borrero Gonzalez <arturo.borrero.glez@gmail.com>]

Batching is needed in current kernels.

Signed-off-by: Arturo Borrero Gonzalez <arturo.borrero.glez@gmail.com>
---
 examples/nft-set-parse-add.c |   43 ++++++++++++++++++++++++++++++++++--------
 1 file changed, 35 insertions(+), 8 deletions(-)

diff --git a/examples/nft-set-parse-add.c b/examples/nft-set-parse-add.c
index b74ad7f..f21385f 100644
--- a/examples/nft-set-parse-add.c
+++ b/examples/nft-set-parse-add.c
@@ -23,6 +23,7 @@
 
 #include <linux/netfilter.h>
 #include <linux/netfilter/nf_tables.h>
+#include <linux/netfilter/nfnetlink.h>
 
 #include <libmnl/libmnl.h>
 #include <libnftnl/set.h>
@@ -66,6 +67,8 @@ static struct nft_set *set_parse_file(const char *file, uint16_t format)
 	}
 
 	nft_parse_err_free(err);
+
+	nft_set_attr_set_u32(s, NFT_SET_ATTR_ID, 1);
 	return s;
 
 }
@@ -75,10 +78,11 @@ int main(int argc, char *argv[])
 	struct mnl_socket *nl;
 	char buf[MNL_SOCKET_BUFFER_SIZE];
 	struct nlmsghdr *nlh;
-	uint32_t portid, seq;
+	uint32_t portid, seq, set_seq;
 	struct nft_set *s;
-	int ret;
+	int ret, batching;
 	uint16_t family, format, outformat;
+	struct mnl_nlmsg_batch *batch;
 
 	if (argc < 2) {
 		printf("Usage: %s {xml|json} <file>\n", argv[0]);
@@ -103,14 +107,34 @@ int main(int argc, char *argv[])
 	nft_set_fprintf(stdout, s, outformat, 0);
 	fprintf(stdout, "\n");
 
-	family = nft_set_attr_get_u32(s, NFT_SET_ATTR_FAMILY);
-
 	seq = time(NULL);
+	batching = nft_batch_is_supported();
+	if (batching < 0) {
+		perror("cannot talk to nfnetlink");
+		exit(EXIT_FAILURE);
+	}
+
+	batch = mnl_nlmsg_batch_start(buf, sizeof(buf));
 
-	nlh = nft_set_nlmsg_build_hdr(buf, NFT_MSG_NEWSET, family,
-					NLM_F_CREATE|NLM_F_ACK, seq);
+	if (batching) {
+		nft_batch_begin(mnl_nlmsg_batch_current(batch), seq++);
+		mnl_nlmsg_batch_next(batch);
+	}
+
+	family = nft_set_attr_get_u32(s, NFT_SET_ATTR_FAMILY);
+
+	set_seq = seq;
+	nlh = nft_set_nlmsg_build_hdr(mnl_nlmsg_batch_current(batch),
+				      NFT_MSG_NEWSET, family,
+				      NLM_F_CREATE|NLM_F_ACK, seq++);
 	nft_set_nlmsg_build_payload(nlh, s);
 	nft_set_free(s);
+	mnl_nlmsg_batch_next(batch);
+
+	if (batching) {
+		nft_batch_end(mnl_nlmsg_batch_current(batch), seq++);
+		mnl_nlmsg_batch_next(batch);
+	}
 
 	nl = mnl_socket_open(NETLINK_NETFILTER);
 	if (nl == NULL) {
@@ -124,14 +148,17 @@ int main(int argc, char *argv[])
 	}
 	portid = mnl_socket_get_portid(nl);
 
-	if (mnl_socket_sendto(nl, nlh, nlh->nlmsg_len) < 0) {
+	if (mnl_socket_sendto(nl, mnl_nlmsg_batch_head(batch),
+			      mnl_nlmsg_batch_size(batch)) < 0) {
 		perror("mnl_socket_send");
 		exit(EXIT_FAILURE);
 	}
 
+	mnl_nlmsg_batch_stop(batch);
+
 	ret = mnl_socket_recvfrom(nl, buf, sizeof(buf));
 	while (ret > 0) {
-		ret = mnl_cb_run(buf, ret, seq, portid, NULL, NULL);
+		ret = mnl_cb_run(buf, ret, set_seq, portid, NULL, NULL);
 		if (ret <= 0)
 			break;
 		ret = mnl_socket_recvfrom(nl, buf, sizeof(buf));