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| author | Willem de Bruijn <willemb@google.com> | 2018-05-31 12:14:39 -0400 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2018-06-04 09:49:39 -0400 |
| commit | 00f333e8d64d9064e636fe4024f6281e2b035a4c (patch) | |
| tree | c5afb8894ac0e96c3aea0d6cea5ec93b74df3f3f /tools | |
| parent | 830669e691464c005ff7262b74797fb2222da99a (diff) | |
| download | linux-0-day-00f333e8d64d9064e636fe4024f6281e2b035a4c.tar.gz linux-0-day-00f333e8d64d9064e636fe4024f6281e2b035a4c.tar.xz | |
selftests/net: udpgso: test small gso_size boundary conditions
Verify that udpgso can generate segments smaller than device mtu, down
to the extreme case of 1B gso_size.
Verify that irrespective of gso_size, udpgso restricts the number of
segments it will generate per call (UDP_MAX_SEGMENTS).
Signed-off-by: Willem de Bruijn <willemb@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'tools')
| -rw-r--r-- | tools/testing/selftests/net/udpgso.c | 77 |
1 files changed, 75 insertions, 2 deletions
diff --git a/tools/testing/selftests/net/udpgso.c b/tools/testing/selftests/net/udpgso.c index 48a0592db938f..e279051bc6312 100644 --- a/tools/testing/selftests/net/udpgso.c +++ b/tools/testing/selftests/net/udpgso.c @@ -34,6 +34,10 @@ #define UDP_SEGMENT 103 #endif +#ifndef UDP_MAX_SEGMENTS +#define UDP_MAX_SEGMENTS (1 << 6UL) +#endif + #define CONST_MTU_TEST 1500 #define CONST_HDRLEN_V4 (sizeof(struct iphdr) + sizeof(struct udphdr)) @@ -136,6 +140,38 @@ struct testcase testcases_v4[] = { .tfail = true, }, { + /* send a single 1B MSS: will fail, see single MSS above */ + .tlen = 1, + .gso_len = 1, + .tfail = true, + .r_num_mss = 1, + }, + { + /* send 2 1B segments */ + .tlen = 2, + .gso_len = 1, + .r_num_mss = 2, + }, + { + /* send 2B + 2B + 1B segments */ + .tlen = 5, + .gso_len = 2, + .r_num_mss = 2, + .r_len_last = 1, + }, + { + /* send max number of min sized segments */ + .tlen = UDP_MAX_SEGMENTS - CONST_HDRLEN_V4, + .gso_len = 1, + .r_num_mss = UDP_MAX_SEGMENTS - CONST_HDRLEN_V4, + }, + { + /* send max number + 1 of min sized segments: fail */ + .tlen = UDP_MAX_SEGMENTS - CONST_HDRLEN_V4 + 1, + .gso_len = 1, + .tfail = true, + }, + { /* EOL */ } }; @@ -211,6 +247,38 @@ struct testcase testcases_v6[] = { .tfail = true, }, { + /* send a single 1B MSS: will fail, see single MSS above */ + .tlen = 1, + .gso_len = 1, + .tfail = true, + .r_num_mss = 1, + }, + { + /* send 2 1B segments */ + .tlen = 2, + .gso_len = 1, + .r_num_mss = 2, + }, + { + /* send 2B + 2B + 1B segments */ + .tlen = 5, + .gso_len = 2, + .r_num_mss = 2, + .r_len_last = 1, + }, + { + /* send max number of min sized segments */ + .tlen = UDP_MAX_SEGMENTS - CONST_HDRLEN_V6, + .gso_len = 1, + .r_num_mss = UDP_MAX_SEGMENTS - CONST_HDRLEN_V6, + }, + { + /* send max number + 1 of min sized segments: fail */ + .tlen = UDP_MAX_SEGMENTS - CONST_HDRLEN_V6 + 1, + .gso_len = 1, + .tfail = true, + }, + { /* EOL */ } }; @@ -375,7 +443,8 @@ static bool __send_one(int fd, struct msghdr *msg, int flags) int ret; ret = sendmsg(fd, msg, flags); - if (ret == -1 && (errno == EMSGSIZE || errno == ENOMEM)) + if (ret == -1 && + (errno == EMSGSIZE || errno == ENOMEM || errno == EINVAL)) return false; if (ret == -1) error(1, errno, "sendmsg"); @@ -466,7 +535,11 @@ static void run_one(struct testcase *test, int fdt, int fdr, if (!sent) return; - mss = addr->sa_family == AF_INET ? CONST_MSS_V4 : CONST_MSS_V6; + if (test->gso_len) + mss = test->gso_len; + else + mss = addr->sa_family == AF_INET ? CONST_MSS_V4 : CONST_MSS_V6; + /* Recv all full MSS datagrams */ for (i = 0; i < test->r_num_mss; i++) { |