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authorIngo Molnar <mingo@kernel.org>2023-07-19 09:43:25 +0200
committerIngo Molnar <mingo@kernel.org>2023-07-19 09:43:25 +0200
commit752182b24bf4ffda1c5a8025515d53122d930bd8 (patch)
tree836031bb239fa1f2288e7ad089b030abea6a4838 /tools/testing/selftests/bpf/progs/async_stack_depth.c
parent48b5583719cdfbdee238f9549a6a1a47af2b0469 (diff)
parentfdf0eaf11452d72945af31804e2a1048ee1b574c (diff)
Merge tag 'v6.5-rc2' into sched/core, to pick up fixes
Sync with upstream fixes before applying EEVDF. Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'tools/testing/selftests/bpf/progs/async_stack_depth.c')
-rw-r--r--tools/testing/selftests/bpf/progs/async_stack_depth.c40
1 files changed, 40 insertions, 0 deletions
diff --git a/tools/testing/selftests/bpf/progs/async_stack_depth.c b/tools/testing/selftests/bpf/progs/async_stack_depth.c
new file mode 100644
index 000000000000..477ba950bb43
--- /dev/null
+++ b/tools/testing/selftests/bpf/progs/async_stack_depth.c
@@ -0,0 +1,40 @@
+// SPDX-License-Identifier: GPL-2.0
+#include <vmlinux.h>
+#include <bpf/bpf_helpers.h>
+
+#include "bpf_misc.h"
+
+struct hmap_elem {
+ struct bpf_timer timer;
+};
+
+struct {
+ __uint(type, BPF_MAP_TYPE_HASH);
+ __uint(max_entries, 64);
+ __type(key, int);
+ __type(value, struct hmap_elem);
+} hmap SEC(".maps");
+
+__attribute__((noinline))
+static int timer_cb(void *map, int *key, struct bpf_timer *timer)
+{
+ volatile char buf[256] = {};
+ return buf[69];
+}
+
+SEC("tc")
+__failure __msg("combined stack size of 2 calls")
+int prog(struct __sk_buff *ctx)
+{
+ struct hmap_elem *elem;
+ volatile char buf[256] = {};
+
+ elem = bpf_map_lookup_elem(&hmap, &(int){0});
+ if (!elem)
+ return 0;
+
+ timer_cb(NULL, NULL, NULL);
+ return bpf_timer_set_callback(&elem->timer, timer_cb) + buf[0];
+}
+
+char _license[] SEC("license") = "GPL";