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selftest: tun: Add test data for success and failure paths

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To improve the robustness and coverage of the TUN selftests, this
patch expands the set of test data.

Signed-off-by: Xu Du <xudu@redhat.com>
Link: https://patch.msgid.link/5054f3ad9f3dbfe33b827183fccc5efeb8fd0da7.1768979440.git.xudu@redhat.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Xu Du
2026-01-21 18:05:01 +08:00
committed by Jakub Kicinski
parent 6bdd7ae605
commit 87db2fdef5
1 changed files with 113 additions and 2 deletions
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115
tools/testing/selftests/net/tun.c
View File

@@ -57,6 +57,10 @@ static struct in6_addr param_ipaddr6_inner_src = {
{ { 0x20, 0x02, 0x0d, 0xb8, 0x02, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 2 } },
};
#ifndef BIT
#define BIT(nr) (1UL << (nr))
#endif
#define VN_ID 1
#define VN_PORT 4789
#define UDP_SRC_PORT 22
@@ -72,6 +76,8 @@ static struct in6_addr param_ipaddr6_inner_src = {
#define UDP_TUNNEL_GENEVE_4IN6 0x04
#define UDP_TUNNEL_GENEVE_6IN6 0x08
#define UDP_TUNNEL_MAX_SEGMENTS BIT(7)
#define UDP_TUNNEL_OUTER_IPV4 (UDP_TUNNEL_GENEVE_4IN4 | UDP_TUNNEL_GENEVE_6IN4)
#define UDP_TUNNEL_INNER_IPV4 (UDP_TUNNEL_GENEVE_4IN4 | UDP_TUNNEL_GENEVE_4IN6)
@@ -553,6 +559,39 @@ FIXTURE_VARIANT(tun_vnet_udptnl)
/* clang-format off */
#define TUN_VNET_UDPTNL_VARIANT_ADD(type, desc) \
FIXTURE_VARIANT_ADD(tun_vnet_udptnl, desc##_nogsosz_1byte) { \
/* no GSO: send a single byte */ \
.tunnel_type = type, \
.data_size = 1, \
.r_num_mss = 1, \
.is_tap = true, \
.no_gso = true, \
}; \
FIXTURE_VARIANT_ADD(tun_vnet_udptnl, desc##_nogsosz_1mss) { \
/* no GSO: send a single MSS, fall back to no GSO */ \
.tunnel_type = type, \
.data_size = UDP_TUNNEL_MSS(type), \
.r_num_mss = 1, \
.is_tap = true, \
.no_gso = true, \
}; \
FIXTURE_VARIANT_ADD(tun_vnet_udptnl, desc##_nogsosz_gtmss) { \
/* no GSO: send a single MSS + 1B: fail */ \
.tunnel_type = type, \
.data_size = UDP_TUNNEL_MSS(type) + 1, \
.r_num_mss = 1, \
.is_tap = true, \
.no_gso = true, \
}; \
FIXTURE_VARIANT_ADD(tun_vnet_udptnl, desc##_1byte) { \
/* GSO: send 1 byte, gso 1 byte, fall back to no GSO */ \
.tunnel_type = type, \
.gso_size = 1, \
.data_size = 1, \
.r_num_mss = 1, \
.is_tap = true, \
.no_gso = true, \
}; \
FIXTURE_VARIANT_ADD(tun_vnet_udptnl, desc##_1mss) { \
/* send a single MSS: fall back to no GSO */ \
.tunnel_type = type, \
@@ -561,8 +600,65 @@ FIXTURE_VARIANT(tun_vnet_udptnl)
.r_num_mss = 1, \
.is_tap = true, \
.no_gso = true, \
};
/* clang-format on */
}; \
FIXTURE_VARIANT_ADD(tun_vnet_udptnl, desc##_ltgso) { \
/* data <= MSS < gso: will fall back to no GSO */ \
.tunnel_type = type, \
.gso_size = UDP_TUNNEL_MSS(type) + 1, \
.data_size = UDP_TUNNEL_MSS(type), \
.r_num_mss = 1, \
.is_tap = true, \
.no_gso = true, \
}; \
FIXTURE_VARIANT_ADD(tun_vnet_udptnl, desc##_gtgso) { \
/* GSO: a single MSS + 1B */ \
.tunnel_type = type, \
.gso_size = UDP_TUNNEL_MSS(type), \
.data_size = UDP_TUNNEL_MSS(type) + 1, \
.r_num_mss = 2, \
.is_tap = true, \
}; \
FIXTURE_VARIANT_ADD(tun_vnet_udptnl, desc##_2mss) { \
/* no GSO: send exactly 2 MSS */ \
.tunnel_type = type, \
.gso_size = UDP_TUNNEL_MSS(type), \
.data_size = UDP_TUNNEL_MSS(type) * 2, \
.r_num_mss = 2, \
.is_tap = true, \
}; \
FIXTURE_VARIANT_ADD(tun_vnet_udptnl, desc##_maxbytes) { \
/* GSO: send max bytes */ \
.tunnel_type = type, \
.gso_size = UDP_TUNNEL_MSS(type), \
.data_size = UDP_TUNNEL_MAX(type, true), \
.r_num_mss = UDP_TUNNEL_MAX(type, true) / \
UDP_TUNNEL_MSS(type) + 1, \
.is_tap = true, \
}; \
FIXTURE_VARIANT_ADD(tun_vnet_udptnl, desc##_over_maxbytes) { \
/* GSO: send oversize max bytes: fail */ \
.tunnel_type = type, \
.gso_size = UDP_TUNNEL_MSS(type), \
.data_size = ETH_MAX_MTU, \
.r_num_mss = ETH_MAX_MTU / UDP_TUNNEL_MSS(type) + 1, \
.is_tap = true, \
}; \
FIXTURE_VARIANT_ADD(tun_vnet_udptnl, desc##_maxsegs) { \
/* GSO: send max number of min sized segments */ \
.tunnel_type = type, \
.gso_size = 1, \
.data_size = UDP_TUNNEL_MAX_SEGMENTS, \
.r_num_mss = UDP_TUNNEL_MAX_SEGMENTS, \
.is_tap = true, \
}; \
FIXTURE_VARIANT_ADD(tun_vnet_udptnl, desc##_5byte) { \
/* GSO: send 5 bytes, gso 2 bytes */ \
.tunnel_type = type, \
.gso_size = 2, \
.data_size = 5, \
.r_num_mss = 3, \
.is_tap = true, \
} /* clang-format on */
TUN_VNET_UDPTNL_VARIANT_ADD(UDP_TUNNEL_GENEVE_4IN4, 4in4);
TUN_VNET_UDPTNL_VARIANT_ADD(UDP_TUNNEL_GENEVE_6IN4, 6in4);
@@ -874,4 +970,19 @@ TEST_F(tun_vnet_udptnl, recv_gso_packet)
}
}
XFAIL_ADD(tun_vnet_udptnl, 4in4_nogsosz_gtmss, recv_gso_packet);
XFAIL_ADD(tun_vnet_udptnl, 6in4_nogsosz_gtmss, recv_gso_packet);
XFAIL_ADD(tun_vnet_udptnl, 4in6_nogsosz_gtmss, recv_gso_packet);
XFAIL_ADD(tun_vnet_udptnl, 6in6_nogsosz_gtmss, recv_gso_packet);
XFAIL_ADD(tun_vnet_udptnl, 4in4_over_maxbytes, send_gso_packet);
XFAIL_ADD(tun_vnet_udptnl, 6in4_over_maxbytes, send_gso_packet);
XFAIL_ADD(tun_vnet_udptnl, 4in6_over_maxbytes, send_gso_packet);
XFAIL_ADD(tun_vnet_udptnl, 6in6_over_maxbytes, send_gso_packet);
XFAIL_ADD(tun_vnet_udptnl, 4in4_over_maxbytes, recv_gso_packet);
XFAIL_ADD(tun_vnet_udptnl, 6in4_over_maxbytes, recv_gso_packet);
XFAIL_ADD(tun_vnet_udptnl, 4in6_over_maxbytes, recv_gso_packet);
XFAIL_ADD(tun_vnet_udptnl, 6in6_over_maxbytes, recv_gso_packet);
TEST_HARNESS_MAIN