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selftests/xsk: add test for too many frags

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Add a test that will exercise maximum number of supported fragments.
This number depends on mode of the test - for SKB and DRV it will be 18
whereas for ZC this is defined by a value from NETDEV_A_DEV_XDP_ZC_MAX_SEGS
netlink attribute.

Signed-off-by: Magnus Karlsson <magnus.karlsson@intel.com>
Signed-off-by: Maciej Fijalkowski <maciej.fijalkowski@intel.com> # made use of new netlink attribute
Link: https://lore.kernel.org/r/20230719132421.584801-24-maciej.fijalkowski@intel.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
This commit is contained in:
Magnus Karlsson
2023-07-19 15:24:20 +02:00
committed by Alexei Starovoitov
parent f80ddbec47
commit 807bf4da20
2 changed files with 55 additions and 2 deletions
Download Patch File Download Diff File Expand all files Collapse all files

54
tools/testing/selftests/bpf/xskxceiver.c
View File

@@ -1982,6 +1982,48 @@ static int testapp_poll_rxq_tmout(struct test_spec *test)
return testapp_validate_traffic_single_thread(test, test->ifobj_rx);
}
static int testapp_too_many_frags(struct test_spec *test)
{
struct pkt pkts[2 * XSK_DESC__MAX_SKB_FRAGS + 2] = {};
u32 max_frags, i;
test_spec_set_name(test, "TOO_MANY_FRAGS");
if (test->mode == TEST_MODE_ZC)
max_frags = test->ifobj_tx->xdp_zc_max_segs;
else
max_frags = XSK_DESC__MAX_SKB_FRAGS;
test->mtu = MAX_ETH_JUMBO_SIZE;
/* Valid packet for synch */
pkts[0].len = MIN_PKT_SIZE;
pkts[0].valid = true;
/* One valid packet with the max amount of frags */
for (i = 1; i < max_frags + 1; i++) {
pkts[i].len = MIN_PKT_SIZE;
pkts[i].options = XDP_PKT_CONTD;
pkts[i].valid = true;
}
pkts[max_frags].options = 0;
/* An invalid packet with the max amount of frags but signals packet
* continues on the last frag
*/
for (i = max_frags + 1; i < 2 * max_frags + 1; i++) {
pkts[i].len = MIN_PKT_SIZE;
pkts[i].options = XDP_PKT_CONTD;
pkts[i].valid = false;
}
/* Valid packet for synch */
pkts[2 * max_frags + 1].len = MIN_PKT_SIZE;
pkts[2 * max_frags + 1].valid = true;
pkt_stream_generate_custom(test, pkts, 2 * max_frags + 2);
return testapp_validate_traffic(test);
}
static int xsk_load_xdp_programs(struct ifobject *ifobj)
{
ifobj->xdp_progs = xsk_xdp_progs__open_and_load();
@@ -2039,9 +2081,14 @@ static void init_iface(struct ifobject *ifobj, const char *dst_mac, const char *
}
if (query_opts.feature_flags & NETDEV_XDP_ACT_RX_SG)
ifobj->multi_buff_supp = true;
if (query_opts.feature_flags & NETDEV_XDP_ACT_XSK_ZEROCOPY)
if (query_opts.xdp_zc_max_segs > 1)
if (query_opts.feature_flags & NETDEV_XDP_ACT_XSK_ZEROCOPY) {
if (query_opts.xdp_zc_max_segs > 1) {
ifobj->multi_buff_zc_supp = true;
ifobj->xdp_zc_max_segs = query_opts.xdp_zc_max_segs;
} else {
ifobj->xdp_zc_max_segs = 0;
}
}
}
static void run_pkt_test(struct test_spec *test, enum test_mode mode, enum test_type type)
@@ -2170,6 +2217,9 @@ static void run_pkt_test(struct test_spec *test, enum test_mode mode, enum test_
test->mtu = MAX_ETH_JUMBO_SIZE;
ret = testapp_xdp_metadata_count(test);
break;
case TEST_TYPE_TOO_MANY_FRAGS:
ret = testapp_too_many_frags(test);
break;
default:
break;
}

3
tools/testing/selftests/bpf/xskxceiver.h
View File

@@ -53,6 +53,7 @@
#define XSK_UMEM__LARGE_FRAME_SIZE (3 * 1024)
#define XSK_UMEM__MAX_FRAME_SIZE (4 * 1024)
#define XSK_DESC__INVALID_OPTION (0xffff)
#define XSK_DESC__MAX_SKB_FRAGS 18
#define HUGEPAGE_SIZE (2 * 1024 * 1024)
#define PKT_DUMP_NB_TO_PRINT 16
@@ -93,6 +94,7 @@ enum test_type {
TEST_TYPE_UNALIGNED_MB,
TEST_TYPE_ALIGNED_INV_DESC_MB,
TEST_TYPE_UNALIGNED_INV_DESC_MB,
TEST_TYPE_TOO_MANY_FRAGS,
TEST_TYPE_MAX
};
@@ -155,6 +157,7 @@ struct ifobject {
int ifindex;
int mtu;
u32 bind_flags;
u32 xdp_zc_max_segs;
bool tx_on;
bool rx_on;
bool use_poll;