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authorBenjamin Tissoires <bentiss@kernel.org>2024-04-20 11:09:12 +0200
committerAlexei Starovoitov <ast@kernel.org>2024-04-23 19:46:57 -0700
commite3d9eac99afd94980475833479332fefd74c5c2b (patch)
tree574bb867d45251d887c5ace80758a5f01322909b /tools/testing/selftests/bpf
parenteb48f6cd41a0f7803770a76bbffb6bd5b1b2ae2f (diff)
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selftests/bpf: wq: add bpf_wq_init() checks
Allows to test if allocation/free works Signed-off-by: Benjamin Tissoires <bentiss@kernel.org> Link: https://lore.kernel.org/r/20240420-bpf_wq-v2-12-6c986a5a741f@kernel.org Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Diffstat (limited to 'tools/testing/selftests/bpf')
-rw-r--r--tools/testing/selftests/bpf/bpf_experimental.h1
-rw-r--r--tools/testing/selftests/bpf/prog_tests/wq.c8
-rw-r--r--tools/testing/selftests/bpf/progs/wq.c10
-rw-r--r--tools/testing/selftests/bpf/progs/wq_failures.c78
4 files changed, 97 insertions, 0 deletions
diff --git a/tools/testing/selftests/bpf/bpf_experimental.h b/tools/testing/selftests/bpf/bpf_experimental.h
index 3329ea080865..785b91b629be 100644
--- a/tools/testing/selftests/bpf/bpf_experimental.h
+++ b/tools/testing/selftests/bpf/bpf_experimental.h
@@ -470,4 +470,5 @@ extern int bpf_iter_css_new(struct bpf_iter_css *it,
extern struct cgroup_subsys_state *bpf_iter_css_next(struct bpf_iter_css *it) __weak __ksym;
extern void bpf_iter_css_destroy(struct bpf_iter_css *it) __weak __ksym;
+extern int bpf_wq_init(struct bpf_wq *wq, void *p__map, unsigned int flags) __weak __ksym;
#endif
diff --git a/tools/testing/selftests/bpf/prog_tests/wq.c b/tools/testing/selftests/bpf/prog_tests/wq.c
index 9a07b8bc2c52..26ab69796103 100644
--- a/tools/testing/selftests/bpf/prog_tests/wq.c
+++ b/tools/testing/selftests/bpf/prog_tests/wq.c
@@ -2,6 +2,7 @@
/* Copyright (c) 2024 Benjamin Tissoires */
#include <test_progs.h>
#include "wq.skel.h"
+#include "wq_failures.skel.h"
void serial_test_wq(void)
{
@@ -9,3 +10,10 @@ void serial_test_wq(void)
RUN_TESTS(wq);
}
+
+void serial_test_failures_wq(void)
+{
+ LIBBPF_OPTS(bpf_test_run_opts, topts);
+
+ RUN_TESTS(wq_failures);
+}
diff --git a/tools/testing/selftests/bpf/progs/wq.c b/tools/testing/selftests/bpf/progs/wq.c
index 833f54aa8fdf..ed2fe26e14ef 100644
--- a/tools/testing/selftests/bpf/progs/wq.c
+++ b/tools/testing/selftests/bpf/progs/wq.c
@@ -52,6 +52,7 @@ struct {
static int test_elem_callback(void *map, int *key)
{
struct elem init = {}, *val;
+ struct bpf_wq *wq;
if (map == &lru &&
bpf_map_update_elem(map, key, &init, 0))
@@ -61,12 +62,17 @@ static int test_elem_callback(void *map, int *key)
if (!val)
return -2;
+ wq = &val->w;
+ if (bpf_wq_init(wq, map, 0) != 0)
+ return -3;
+
return 0;
}
static int test_hmap_elem_callback(void *map, int *key)
{
struct hmap_elem init = {}, *val;
+ struct bpf_wq *wq;
if (bpf_map_update_elem(map, key, &init, 0))
return -1;
@@ -75,6 +81,10 @@ static int test_hmap_elem_callback(void *map, int *key)
if (!val)
return -2;
+ wq = &val->work;
+ if (bpf_wq_init(wq, map, 0) != 0)
+ return -3;
+
return 0;
}
diff --git a/tools/testing/selftests/bpf/progs/wq_failures.c b/tools/testing/selftests/bpf/progs/wq_failures.c
new file mode 100644
index 000000000000..db7015c7d541
--- /dev/null
+++ b/tools/testing/selftests/bpf/progs/wq_failures.c
@@ -0,0 +1,78 @@
+// SPDX-License-Identifier: GPL-2.0
+/* Copyright (c) 2024 Benjamin Tissoires
+ */
+
+#include "bpf_experimental.h"
+#include <bpf/bpf_helpers.h>
+#include "bpf_misc.h"
+#include "../bpf_testmod/bpf_testmod_kfunc.h"
+
+char _license[] SEC("license") = "GPL";
+
+struct elem {
+ struct bpf_wq w;
+};
+
+struct {
+ __uint(type, BPF_MAP_TYPE_ARRAY);
+ __uint(max_entries, 2);
+ __type(key, int);
+ __type(value, struct elem);
+} array SEC(".maps");
+
+struct {
+ __uint(type, BPF_MAP_TYPE_LRU_HASH);
+ __uint(max_entries, 4);
+ __type(key, int);
+ __type(value, struct elem);
+} lru SEC(".maps");
+
+SEC("tc")
+/* test that bpf_wq_init takes a map as a second argument
+ */
+__log_level(2)
+__flag(BPF_F_TEST_STATE_FREQ)
+__failure
+__msg(": (85) call bpf_wq_init#") /* anchor message */
+__msg("pointer in R2 isn't map pointer")
+long test_wq_init_nomap(void *ctx)
+{
+ struct bpf_wq *wq;
+ struct elem *val;
+ int key = 0;
+
+ val = bpf_map_lookup_elem(&array, &key);
+ if (!val)
+ return -1;
+
+ wq = &val->w;
+ if (bpf_wq_init(wq, &key, 0) != 0)
+ return -3;
+
+ return 0;
+}
+
+SEC("tc")
+/* test that the workqueue is part of the map in bpf_wq_init
+ */
+__log_level(2)
+__flag(BPF_F_TEST_STATE_FREQ)
+__failure
+__msg(": (85) call bpf_wq_init#") /* anchor message */
+__msg("workqueue pointer in R1 map_uid=0 doesn't match map pointer in R2 map_uid=0")
+long test_wq_init_wrong_map(void *ctx)
+{
+ struct bpf_wq *wq;
+ struct elem *val;
+ int key = 0;
+
+ val = bpf_map_lookup_elem(&array, &key);
+ if (!val)
+ return -1;
+
+ wq = &val->w;
+ if (bpf_wq_init(wq, &lru, 0) != 0)
+ return -3;
+
+ return 0;
+}