From: Lorenzo Bianconi <lorenzo@kernel.org>
To: bpf@vger.kernel.org, netdev@vger.kernel.org
Cc: lorenzo.bianconi@redhat.com, davem@davemloft.net,
kuba@kernel.org, ast@kernel.org, daniel@iogearbox.net,
shayagr@amazon.com, john.fastabend@gmail.com, dsahern@kernel.org,
brouer@redhat.com, echaudro@redhat.com, jasowang@redhat.com,
alexander.duyck@gmail.com, saeed@kernel.org,
maciej.fijalkowski@intel.com, magnus.karlsson@intel.com,
tirthendu.sarkar@intel.com, toke@redhat.com
Subject: [PATCH v16 bpf-next 17/20] bpf: update xdp_adjust_tail selftest to include multi-buffer
Date: Fri, 15 Oct 2021 15:08:54 +0200 [thread overview]
Message-ID: <53d24d9fd4c850bb5cfe953c17b4b514dbb39540.1634301224.git.lorenzo@kernel.org> (raw)
In-Reply-To: <cover.1634301224.git.lorenzo@kernel.org>
From: Eelco Chaudron <echaudro@redhat.com>
This change adds test cases for the multi-buffer scenarios when shrinking
and growing.
Signed-off-by: Eelco Chaudron <echaudro@redhat.com>
Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
---
.../bpf/prog_tests/xdp_adjust_tail.c | 118 ++++++++++++++++++
.../bpf/progs/test_xdp_adjust_tail_grow.c | 10 +-
.../bpf/progs/test_xdp_adjust_tail_shrink.c | 32 ++++-
3 files changed, 153 insertions(+), 7 deletions(-)
diff --git a/tools/testing/selftests/bpf/prog_tests/xdp_adjust_tail.c b/tools/testing/selftests/bpf/prog_tests/xdp_adjust_tail.c
index d5c98f2cb12f..40f7ae798fd1 100644
--- a/tools/testing/selftests/bpf/prog_tests/xdp_adjust_tail.c
+++ b/tools/testing/selftests/bpf/prog_tests/xdp_adjust_tail.c
@@ -130,6 +130,120 @@ void test_xdp_adjust_tail_grow2(void)
bpf_object__close(obj);
}
+void test_xdp_adjust_mb_tail_shrink(void)
+{
+ const char *file = "./test_xdp_adjust_tail_shrink.o";
+ __u32 duration, retval, size, exp_size;
+ struct bpf_object *obj;
+ int err, prog_fd;
+ __u8 *buf;
+
+ /* For the individual test cases, the first byte in the packet
+ * indicates which test will be run.
+ */
+
+ err = bpf_prog_load(file, BPF_PROG_TYPE_XDP, &obj, &prog_fd);
+ if (CHECK_FAIL(err))
+ return;
+
+ buf = malloc(9000);
+ if (CHECK(!buf, "malloc()", "error:%s\n", strerror(errno)))
+ return;
+
+ memset(buf, 0, 9000);
+
+ /* Test case removing 10 bytes from last frag, NOT freeing it */
+ exp_size = 8990; /* 9000 - 10 */
+ err = bpf_prog_test_run(prog_fd, 1, buf, 9000,
+ buf, &size, &retval, &duration);
+
+ CHECK(err || retval != XDP_TX || size != exp_size,
+ "9k-10b", "err %d errno %d retval %d[%d] size %d[%u]\n",
+ err, errno, retval, XDP_TX, size, exp_size);
+
+ /* Test case removing one of two pages, assuming 4K pages */
+ buf[0] = 1;
+ exp_size = 4900; /* 9000 - 4100 */
+ err = bpf_prog_test_run(prog_fd, 1, buf, 9000,
+ buf, &size, &retval, &duration);
+
+ CHECK(err || retval != XDP_TX || size != exp_size,
+ "9k-1p", "err %d errno %d retval %d[%d] size %d[%u]\n",
+ err, errno, retval, XDP_TX, size, exp_size);
+
+ /* Test case removing two pages resulting in a non mb xdp_buff */
+ buf[0] = 2;
+ exp_size = 800; /* 9000 - 8200 */
+ err = bpf_prog_test_run(prog_fd, 1, buf, 9000,
+ buf, &size, &retval, &duration);
+
+ CHECK(err || retval != XDP_TX || size != exp_size,
+ "9k-2p", "err %d errno %d retval %d[%d] size %d[%u]\n",
+ err, errno, retval, XDP_TX, size, exp_size);
+
+ free(buf);
+
+ bpf_object__close(obj);
+}
+
+void test_xdp_adjust_mb_tail_grow(void)
+{
+ const char *file = "./test_xdp_adjust_tail_grow.o";
+ __u32 duration, retval, size, exp_size;
+ struct bpf_object *obj;
+ int err, i, prog_fd;
+ __u8 *buf;
+
+ err = bpf_prog_load(file, BPF_PROG_TYPE_XDP, &obj, &prog_fd);
+ if (CHECK_FAIL(err))
+ return;
+
+ buf = malloc(16384);
+ if (CHECK(!buf, "malloc()", "error:%s\n", strerror(errno)))
+ return;
+
+ /* Test case add 10 bytes to last frag */
+ memset(buf, 1, 16384);
+ size = 9000;
+ exp_size = size + 10;
+ err = bpf_prog_test_run(prog_fd, 1, buf, size,
+ buf, &size, &retval, &duration);
+
+ CHECK(err || retval != XDP_TX || size != exp_size,
+ "9k+10b", "err %d retval %d[%d] size %d[%u]\n",
+ err, retval, XDP_TX, size, exp_size);
+
+ for (i = 0; i < 9000; i++)
+ CHECK(buf[i] != 1, "9k+10b-old",
+ "Old data not all ok, offset %i is failing [%u]!\n",
+ i, buf[i]);
+
+ for (i = 9000; i < 9010; i++)
+ CHECK(buf[i] != 0, "9k+10b-new",
+ "New data not all ok, offset %i is failing [%u]!\n",
+ i, buf[i]);
+
+ for (i = 9010; i < 16384; i++)
+ CHECK(buf[i] != 1, "9k+10b-untouched",
+ "Unused data not all ok, offset %i is failing [%u]!\n",
+ i, buf[i]);
+
+ /* Test a too large grow */
+ memset(buf, 1, 16384);
+ size = 9001;
+ exp_size = size;
+ err = bpf_prog_test_run(prog_fd, 1, buf, size,
+ buf, &size, &retval, &duration);
+
+ CHECK(err || retval != XDP_DROP || size != exp_size,
+ "9k+10b", "err %d retval %d[%d] size %d[%u]\n",
+ err, retval, XDP_TX, size, exp_size);
+
+ free(buf);
+
+ bpf_object__close(obj);
+}
+
void test_xdp_adjust_tail(void)
{
if (test__start_subtest("xdp_adjust_tail_shrink"))
@@ -138,4 +252,8 @@ void test_xdp_adjust_tail(void)
test_xdp_adjust_tail_grow();
if (test__start_subtest("xdp_adjust_tail_grow2"))
test_xdp_adjust_tail_grow2();
+ if (test__start_subtest("xdp_adjust_mb_tail_shrink"))
+ test_xdp_adjust_mb_tail_shrink();
+ if (test__start_subtest("xdp_adjust_mb_tail_grow"))
+ test_xdp_adjust_mb_tail_grow();
}
diff --git a/tools/testing/selftests/bpf/progs/test_xdp_adjust_tail_grow.c b/tools/testing/selftests/bpf/progs/test_xdp_adjust_tail_grow.c
index 199c61b7d062..53b64c999450 100644
--- a/tools/testing/selftests/bpf/progs/test_xdp_adjust_tail_grow.c
+++ b/tools/testing/selftests/bpf/progs/test_xdp_adjust_tail_grow.c
@@ -7,11 +7,10 @@ int _xdp_adjust_tail_grow(struct xdp_md *xdp)
{
void *data_end = (void *)(long)xdp->data_end;
void *data = (void *)(long)xdp->data;
- unsigned int data_len;
+ int data_len = bpf_xdp_get_buff_len(xdp);
int offset = 0;
/* Data length determine test case */
- data_len = data_end - data;
if (data_len == 54) { /* sizeof(pkt_v4) */
offset = 4096; /* test too large offset */
@@ -20,7 +19,12 @@ int _xdp_adjust_tail_grow(struct xdp_md *xdp)
} else if (data_len == 64) {
offset = 128;
} else if (data_len == 128) {
- offset = 4096 - 256 - 320 - data_len; /* Max tail grow 3520 */
+ /* Max tail grow 3520 */
+ offset = 4096 - 256 - 320 - data_len;
+ } else if (data_len == 9000) {
+ offset = 10;
+ } else if (data_len == 9001) {
+ offset = 4096;
} else {
return XDP_ABORTED; /* No matching test */
}
diff --git a/tools/testing/selftests/bpf/progs/test_xdp_adjust_tail_shrink.c b/tools/testing/selftests/bpf/progs/test_xdp_adjust_tail_shrink.c
index b7448253d135..eeff48997b6e 100644
--- a/tools/testing/selftests/bpf/progs/test_xdp_adjust_tail_shrink.c
+++ b/tools/testing/selftests/bpf/progs/test_xdp_adjust_tail_shrink.c
@@ -12,14 +12,38 @@
SEC("xdp")
int _xdp_adjust_tail_shrink(struct xdp_md *xdp)
{
- void *data_end = (void *)(long)xdp->data_end;
- void *data = (void *)(long)xdp->data;
+ __u8 *data_end = (void *)(long)xdp->data_end;
+ __u8 *data = (void *)(long)xdp->data;
int offset = 0;
- if (data_end - data == 54) /* sizeof(pkt_v4) */
+ switch (bpf_xdp_get_buff_len(xdp)) {
+ case 54:
+ /* sizeof(pkt_v4) */
offset = 256; /* shrink too much */
- else
+ break;
+ case 9000:
+ /* Multi-buffer test cases */
+ if (data + 1 > data_end)
+ return XDP_DROP;
+
+ switch (data[0]) {
+ case 0:
+ offset = 10;
+ break;
+ case 1:
+ offset = 4100;
+ break;
+ case 2:
+ offset = 8200;
+ break;
+ default:
+ return XDP_DROP;
+ }
+ break;
+ default:
offset = 20;
+ break;
+ }
if (bpf_xdp_adjust_tail(xdp, 0 - offset))
return XDP_DROP;
return XDP_TX;
--
2.31.1
next prev parent reply other threads:[~2021-10-15 13:10 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-10-15 13:08 [PATCH v16 bpf-next 00/20] mvneta: introduce XDP multi-buffer support Lorenzo Bianconi
2021-10-15 13:08 ` [PATCH v16 bpf-next 01/20] net: skbuff: add size metadata to skb_shared_info for xdp Lorenzo Bianconi
2021-10-15 13:08 ` [PATCH v16 bpf-next 02/20] xdp: introduce flags field in xdp_buff/xdp_frame Lorenzo Bianconi
2021-10-15 13:08 ` [PATCH v16 bpf-next 03/20] net: mvneta: update mb bit before passing the xdp buffer to eBPF layer Lorenzo Bianconi
2021-10-15 13:08 ` [PATCH v16 bpf-next 04/20] net: mvneta: simplify mvneta_swbm_add_rx_fragment management Lorenzo Bianconi
2021-10-15 13:08 ` [PATCH v16 bpf-next 05/20] net: xdp: add xdp_update_skb_shared_info utility routine Lorenzo Bianconi
2021-10-15 13:08 ` [PATCH v16 bpf-next 06/20] net: marvell: rely on " Lorenzo Bianconi
2021-10-15 13:08 ` [PATCH v16 bpf-next 07/20] xdp: add multi-buff support to xdp_return_{buff/frame} Lorenzo Bianconi
2021-10-15 13:08 ` [PATCH v16 bpf-next 08/20] net: mvneta: add multi buffer support to XDP_TX Lorenzo Bianconi
2021-10-15 13:08 ` [PATCH v16 bpf-next 09/20] bpf: introduce BPF_F_XDP_MB flag in prog_flags loading the ebpf program Lorenzo Bianconi
2021-10-15 13:22 ` Toke Høiland-Jørgensen
2021-10-15 13:29 ` Lorenzo Bianconi
2021-10-15 16:03 ` Toke Høiland-Jørgensen
2021-10-15 13:08 ` [PATCH v16 bpf-next 10/20] net: mvneta: enable jumbo frames if the loaded XDP program support mb Lorenzo Bianconi
2021-10-15 13:08 ` [PATCH v16 bpf-next 11/20] bpf: add multi-buff support to the bpf_xdp_adjust_tail() API Lorenzo Bianconi
2021-10-15 13:08 ` [PATCH v16 bpf-next 12/20] bpf: introduce bpf_xdp_get_buff_len helper Lorenzo Bianconi
2021-10-15 13:08 ` [PATCH v16 bpf-next 13/20] bpf: add multi-buffer support to xdp copy helpers Lorenzo Bianconi
2021-10-15 13:08 ` [PATCH v16 bpf-next 14/20] bpf: move user_size out of bpf_test_init Lorenzo Bianconi
2021-10-15 13:08 ` [PATCH v16 bpf-next 15/20] bpf: introduce multibuff support to bpf_prog_test_run_xdp() Lorenzo Bianconi
2021-10-15 13:08 ` [PATCH v16 bpf-next 16/20] bpf: test_run: add xdp_shared_info pointer in bpf_test_finish signature Lorenzo Bianconi
2021-10-15 13:08 ` Lorenzo Bianconi [this message]
2021-10-15 13:08 ` [PATCH v16 bpf-next 18/20] libbpf: Add SEC name for xdp_mb programs Lorenzo Bianconi
2021-10-15 13:08 ` [PATCH v16 bpf-next 19/20] net: xdp: introduce bpf_xdp_pointer utility routine Lorenzo Bianconi
2021-10-27 22:53 ` Daniel Borkmann
2021-10-28 9:26 ` Lorenzo Bianconi
2021-10-15 13:08 ` [PATCH v16 bpf-next 20/20] bpf: introduce bpf_xdp_{load,store}_bytes selftest Lorenzo Bianconi
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