[PATCH liburing 1/3] examples: remove zcrx size limiting

[Pavel Begunkov <asml.silence@gmail.com>]

It's not handled too well and is not great at show casing the feature,
remove it for now, we may add it back later in a different form.

Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
---
 examples/zcrx.c | 34 ++++------------------------------
 1 file changed, 4 insertions(+), 30 deletions(-)

diff --git a/examples/zcrx.c b/examples/zcrx.c
index 32d9e4ae..afc05642 100644
--- a/examples/zcrx.c
+++ b/examples/zcrx.c
@@ -46,8 +46,6 @@ static long page_size;
 static int cfg_port = 8000;
 static const char *cfg_ifname;
 static int cfg_queue_id = -1;
-static bool cfg_oneshot;
-static int cfg_oneshot_recvs;
 static bool cfg_verify_data = false;
 static struct sockaddr_in6 cfg_addr;
 
@@ -150,16 +148,6 @@ static void add_recvzc(struct io_uring *ring, int sockfd)
 	sqe->user_data = 2;
 }
 
-static void add_recvzc_oneshot(struct io_uring *ring, int sockfd, size_t len)
-{
-	struct io_uring_sqe *sqe = io_uring_get_sqe(ring);
-
-	io_uring_prep_rw(IORING_OP_RECV_ZC, sqe, sockfd, NULL, len, 0);
-	sqe->ioprio |= IORING_RECV_MULTISHOT;
-	sqe->zcrx_ifq_idx = zcrx_id;
-	sqe->user_data = 2;
-}
-
 static void process_accept(struct io_uring *ring, struct io_uring_cqe *cqe)
 {
 	if (cqe->res < 0)
@@ -168,10 +156,7 @@ static void process_accept(struct io_uring *ring, struct io_uring_cqe *cqe)
 		t_error(1, 0, "Unexpected second connection");
 
 	connfd = cqe->res;
-	if (cfg_oneshot)
-		add_recvzc_oneshot(ring, connfd, page_size);
-	else
-		add_recvzc(ring, connfd);
+	add_recvzc(ring, connfd);
 }
 
 static void verify_data(char *data, size_t size, unsigned long seq)
@@ -200,19 +185,13 @@ static void process_recvzc(struct io_uring *ring, struct io_uring_cqe *cqe)
 	if (cqe->res < 0)
 		t_error(1, 0, "recvzc(): %d", cqe->res);
 
-	if (cqe->res == 0 && cqe->flags == 0 && cfg_oneshot_recvs == 0) {
+	if (cqe->res == 0 && cqe->flags == 0) {
 		stop = true;
 		return;
 	}
 
-	if (cfg_oneshot) {
-		if (cqe->res == 0 && cqe->flags == 0 && cfg_oneshot_recvs) {
-			add_recvzc_oneshot(ring, connfd, page_size);
-			cfg_oneshot_recvs--;
-		}
-	} else if (!(cqe->flags & IORING_CQE_F_MORE)) {
+	if (!(cqe->flags & IORING_CQE_F_MORE))
 		add_recvzc(ring, connfd);
-	}
 
 	rcqe = (struct io_uring_zcrx_cqe *)(cqe + 1);
 	mask = (1ULL << IORING_ZCRX_AREA_SHIFT) - 1;
@@ -299,7 +278,7 @@ static void parse_opts(int argc, char **argv)
 	if (argc <= 1)
 		usage(argv[0]);
 
-	while ((c = getopt(argc, argv, "vp:i:q:o:")) != -1) {
+	while ((c = getopt(argc, argv, "vp:i:q:")) != -1) {
 		switch (c) {
 		case 'p':
 			cfg_port = strtoul(optarg, NULL, 0);
@@ -307,11 +286,6 @@ static void parse_opts(int argc, char **argv)
 		case 'i':
 			cfg_ifname = optarg;
 			break;
-		case 'o': {
-			cfg_oneshot = true;
-			cfg_oneshot_recvs = strtoul(optarg, NULL, 0);
-			break;
-		}
 		case 'q':
 			cfg_queue_id = strtoul(optarg, NULL, 0);
 			break;
-- 
2.48.1