integration-test: add tc_name_limit_exceeded

This test is to ensure that attaching a tc program that has
a name longer than the maximum allowed length by the kernel
will fail.

Signed-off-by: Mohammad Javad Pooladkhay <m.pooladkhay@gmail.com>

test/integration-ebpf/Cargo.toml

@@ -48,6 +48,10 @@ path = "src/two_progs.rs"
 name = "tc_name_limit"
 path = "src/tc_name_limit.rs"
 
+[[bin]]
+name = "tc_name_limit_exceeded"
+path = "src/tc_name_limit_exceeded.rs"
+
 [[bin]]
 name = "redirect"
 path = "src/redirect.rs"

test/integration-ebpf/src/tc_name_limit_exceeded.rs

@@ -0,0 +1,25 @@
+#![no_std]
+#![no_main]
+
+use aya_bpf::{macros::classifier, programs::TcContext};
+
+/*
+A function with a 257-byte-long name (all 'a's) to be used as the name of
+the ebpf program. This name must match the name passed to userspace side
+of the program (i.e. test/integration-test/src/tests/load.rs).
+
+256 is the maximum length allowed by the kernel, so this test should fail.
+https://github.com/torvalds/linux/blob/02aee814/net/sched/cls_bpf.c#L28
+*/
+#[classifier]
+pub fn aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa(
+    _ctx: TcContext,
+) -> i32 {
+    0
+}
+
+#[cfg(not(test))]
+#[panic_handler]
+fn panic(_info: &core::panic::PanicInfo) -> ! {
+    loop {}
+}

test/integration-test/src/lib.rs

@@ -15,6 +15,8 @@ pub const MAP_TEST: &[u8] = include_bytes_aligned!(concat!(env!("OUT_DIR"), "/ma
 pub const NAME_TEST: &[u8] = include_bytes_aligned!(concat!(env!("OUT_DIR"), "/name_test"));
 pub const TC_NAME_LIMIT_TEST: &[u8] =
     include_bytes_aligned!(concat!(env!("OUT_DIR"), "/tc_name_limit"));
+pub const TC_NAME_LIMIT_EXCEEDED_TEST: &[u8] =
+    include_bytes_aligned!(concat!(env!("OUT_DIR"), "/tc_name_limit_exceeded"));
 pub const PASS: &[u8] = include_bytes_aligned!(concat!(env!("OUT_DIR"), "/pass"));
 pub const TEST: &[u8] = include_bytes_aligned!(concat!(env!("OUT_DIR"), "/test"));
 pub const RELOCATIONS: &[u8] = include_bytes_aligned!(concat!(env!("OUT_DIR"), "/relocations"));