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Message-ID: <1464000201-15560-3-git-send-email-mst@redhat.com>
Date: Mon, 23 May 2016 13:43:46 +0300
From: "Michael S. Tsirkin" <mst@...hat.com>
To: linux-kernel@...r.kernel.org
Cc: "Michael S. Tsirkin" <mst@...hat.com>,
Jason Wang <jasowang@...hat.com>,
Eric Dumazet <eric.dumazet@...il.com>, davem@...emloft.net,
netdev@...r.kernel.org, Steven Rostedt <rostedt@...dmis.org>,
brouer@...hat.com
Subject: [PATCH v5 2/2] skb_array: ring test
Add ringtest based unit test for skb array.
Signed-off-by: Michael S. Tsirkin <mst@...hat.com>
---
tools/virtio/ringtest/skb_array.c | 167 ++++++++++++++++++++++++++++++++++++++
tools/virtio/ringtest/Makefile | 4 +-
2 files changed, 170 insertions(+), 1 deletion(-)
create mode 100644 tools/virtio/ringtest/skb_array.c
diff --git a/tools/virtio/ringtest/skb_array.c b/tools/virtio/ringtest/skb_array.c
new file mode 100644
index 0000000..4ab7e31
--- /dev/null
+++ b/tools/virtio/ringtest/skb_array.c
@@ -0,0 +1,167 @@
+#define _GNU_SOURCE
+#include "main.h"
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <pthread.h>
+#include <malloc.h>
+#include <assert.h>
+#include <errno.h>
+#include <limits.h>
+
+struct sk_buff;
+#define SMP_CACHE_BYTES 64
+#define cache_line_size() SMP_CACHE_BYTES
+#define ____cacheline_aligned_in_smp __attribute__ ((aligned (SMP_CACHE_BYTES)))
+#define unlikely(x) (__builtin_expect(!!(x), 0))
+#define ALIGN(x, a) (((x) + (a) - 1) / (a) * (a))
+typedef pthread_spinlock_t spinlock_t;
+
+typedef int gfp_t;
+static void *kzalloc(unsigned size, gfp_t gfp)
+{
+ void *p = memalign(64, size);
+ if (!p)
+ return p;
+ memset(p, 0, size);
+
+ return p;
+}
+
+static void kfree(void *p)
+{
+ if (p)
+ free(p);
+}
+
+static void spin_lock_init(spinlock_t *lock)
+{
+ int r = pthread_spin_init(lock, 0);
+ assert(!r);
+}
+
+static void spin_lock_bh(spinlock_t *lock)
+{
+ int ret = pthread_spin_lock(lock);
+ assert(!ret);
+}
+
+static void spin_unlock_bh(spinlock_t *lock)
+{
+ int ret = pthread_spin_unlock(lock);
+ assert(!ret);
+}
+
+#include "../../../include/linux/skb_array.h"
+
+static unsigned long long headcnt, tailcnt;
+static struct skb_array array ____cacheline_aligned_in_smp;
+
+/* implemented by ring */
+void alloc_ring(void)
+{
+ int ret = skb_array_init(&array, ring_size, 0);
+ assert(!ret);
+}
+
+/* guest side */
+int add_inbuf(unsigned len, void *buf, void *datap)
+{
+ int ret;
+
+ assert(headcnt - tailcnt <= ring_size);
+ ret = __skb_array_produce(&array, buf);
+ if (ret >= 0) {
+ ret = 0;
+ headcnt++;
+ }
+
+ return ret;
+}
+
+/*
+ * skb_array API provides no way for producer to find out whether a given
+ * buffer was consumed. Our tests merely require that a successful get_buf
+ * implies that add_inbuf succeed in the past, and that add_inbuf will succeed,
+ * fake it accordingly.
+ */
+void *get_buf(unsigned *lenp, void **bufp)
+{
+ void *datap;
+
+ if (tailcnt == headcnt || __skb_array_full(&array))
+ datap = NULL;
+ else {
+ datap = "Buffer\n";
+ ++tailcnt;
+ }
+
+ return datap;
+}
+
+void poll_used(void)
+{
+ void *b;
+
+ do {
+ if (tailcnt == headcnt || __skb_array_full(&array)) {
+ b = NULL;
+ barrier();
+ } else {
+ b = "Buffer\n";
+ }
+ } while (!b);
+}
+
+void disable_call()
+{
+ assert(0);
+}
+
+bool enable_call()
+{
+ assert(0);
+}
+
+void kick_available(void)
+{
+ assert(0);
+}
+
+/* host side */
+void disable_kick()
+{
+ assert(0);
+}
+
+bool enable_kick()
+{
+ assert(0);
+}
+
+void poll_avail(void)
+{
+ void *b;
+
+ do {
+ b = __skb_array_peek(&array);
+ barrier();
+ } while (!b);
+}
+
+bool use_buf(unsigned *lenp, void **bufp)
+{
+ struct sk_buff *skb;
+
+ skb = __skb_array_peek(&array);
+ if (skb) {
+ __skb_array_consume(&array);
+ }
+
+ return skb;
+}
+
+void call_used(void)
+{
+ assert(0);
+}
diff --git a/tools/virtio/ringtest/Makefile b/tools/virtio/ringtest/Makefile
index 6ba7455..87e58cf 100644
--- a/tools/virtio/ringtest/Makefile
+++ b/tools/virtio/ringtest/Makefile
@@ -1,6 +1,6 @@
all:
-all: ring virtio_ring_0_9 virtio_ring_poll virtio_ring_inorder
+all: ring virtio_ring_0_9 virtio_ring_poll virtio_ring_inorder skb_array
CFLAGS += -Wall
CFLAGS += -pthread -O2 -ggdb
@@ -8,6 +8,7 @@ LDFLAGS += -pthread -O2 -ggdb
main.o: main.c main.h
ring.o: ring.c main.h
+skb_array.o: skb_array.c main.h ../../../include/linux/skb_array.h
virtio_ring_0_9.o: virtio_ring_0_9.c main.h
virtio_ring_poll.o: virtio_ring_poll.c virtio_ring_0_9.c main.h
virtio_ring_inorder.o: virtio_ring_inorder.c virtio_ring_0_9.c main.h
@@ -15,6 +16,7 @@ ring: ring.o main.o
virtio_ring_0_9: virtio_ring_0_9.o main.o
virtio_ring_poll: virtio_ring_poll.o main.o
virtio_ring_inorder: virtio_ring_inorder.o main.o
+skb_array: skb_array.o main.o
clean:
-rm main.o
-rm ring.o ring
--
MST
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