Insert 3 programs to check that we are doing the correct thing: '2', '1', '3' are inserted, but '1' is supposed to be executed first.
Signed-off-by: Benjamin Tissoires benjamin.tissoires@redhat.com
---
changes in v5: - use the new API
not in v4
changes in v3: - use the new hid_get_data API
new in v2 --- tools/testing/selftests/bpf/prog_tests/hid.c | 107 +++++++++++++++++++ tools/testing/selftests/bpf/progs/hid.c | 54 +++++++++- 2 files changed, 160 insertions(+), 1 deletion(-)
diff --git a/tools/testing/selftests/bpf/prog_tests/hid.c b/tools/testing/selftests/bpf/prog_tests/hid.c index 4375c1cc00dc..c2b3f580605e 100644 --- a/tools/testing/selftests/bpf/prog_tests/hid.c +++ b/tools/testing/selftests/bpf/prog_tests/hid.c @@ -9,6 +9,7 @@ #include <dirent.h> #include <poll.h> #include <stdbool.h> +#include <linux/hid_bpf.h> #include <linux/hidraw.h> #include <linux/uhid.h>
@@ -83,6 +84,7 @@ static u8 feature_data[] = { 1, 2 }; struct attach_prog_args { int prog_fd; unsigned int hid; + unsigned int flags; int retval; };
@@ -770,6 +772,109 @@ static int test_hid_user_raw_request_call(int uhid_fd, int dev_id) return ret; }
+/* + * Attach hid_insert{0,1,2} to the given uhid device, + * retrieve and open the matching hidraw node, + * inject one event in the uhid device, + * check that the programs have been inserted in the correct order. + */ +static int test_hid_attach_flags(int uhid_fd, int dev_id) +{ + struct hid *hid_skel = NULL; + u8 buf[64] = {0}; + int hidraw_fd = -1; + int hid_id, attach_fd, err = -EINVAL; + struct attach_prog_args args = { + .retval = -1, + }; + DECLARE_LIBBPF_OPTS(bpf_test_run_opts, tattr, + .ctx_in = &args, + .ctx_size_in = sizeof(args), + ); + + /* locate the uevent file of the created device */ + hid_id = get_hid_id(dev_id); + if (!ASSERT_GE(hid_id, 0, "locate uhid device id")) + goto cleanup; + + args.hid = hid_id; + + hid_skel = hid__open(); + if (!ASSERT_OK_PTR(hid_skel, "hid_skel_open")) + goto cleanup; + + bpf_program__set_autoload(hid_skel->progs.hid_test_insert1, true); + bpf_program__set_autoload(hid_skel->progs.hid_test_insert2, true); + bpf_program__set_autoload(hid_skel->progs.hid_test_insert3, true); + + err = hid__load(hid_skel); + if (!ASSERT_OK(err, "hid_skel_load")) + goto cleanup; + + attach_fd = bpf_program__fd(hid_skel->progs.attach_prog); + if (!ASSERT_GE(attach_fd, 0, "locate attach_prog")) { + err = attach_fd; + goto cleanup; + } + + /* attach hid_test_insert2 program */ + args.prog_fd = bpf_program__fd(hid_skel->progs.hid_test_insert2); + args.flags = HID_BPF_FLAG_NONE; + args.retval = 1; + err = bpf_prog_test_run_opts(attach_fd, &tattr); + if (!ASSERT_EQ(args.retval, 0, "attach_hid_test_insert2")) + goto cleanup; + + /* then attach hid_test_insert1 program before the previous*/ + args.prog_fd = bpf_program__fd(hid_skel->progs.hid_test_insert1); + args.flags = HID_BPF_FLAG_INSERT_HEAD; + args.retval = 1; + err = bpf_prog_test_run_opts(attach_fd, &tattr); + if (!ASSERT_EQ(args.retval, 0, "attach_hid_test_insert1")) + goto cleanup; + + /* finally attach hid_test_insert3 at the end */ + args.prog_fd = bpf_program__fd(hid_skel->progs.hid_test_insert3); + args.flags = HID_BPF_FLAG_NONE; + args.retval = 1; + err = bpf_prog_test_run_opts(attach_fd, &tattr); + if (!ASSERT_EQ(args.retval, 0, "attach_hid_test_insert3")) + goto cleanup; + + hidraw_fd = open_hidraw(dev_id); + if (!ASSERT_GE(hidraw_fd, 0, "open_hidraw")) + goto cleanup; + + /* inject one event */ + buf[0] = 1; + send_event(uhid_fd, buf, 6); + + /* read the data from hidraw */ + memset(buf, 0, sizeof(buf)); + err = read(hidraw_fd, buf, sizeof(buf)); + if (!ASSERT_EQ(err, 6, "read_hidraw")) + goto cleanup; + + if (!ASSERT_EQ(buf[1], 1, "hid_test_insert1")) + goto cleanup; + + if (!ASSERT_EQ(buf[2], 2, "hid_test_insert2")) + goto cleanup; + + if (!ASSERT_EQ(buf[3], 3, "hid_test_insert3")) + goto cleanup; + + err = 0; + + cleanup: + if (hidraw_fd >= 0) + close(hidraw_fd); + + hid__destroy(hid_skel); + + return err; +} + /* * Attach hid_rdesc_fixup to the given uhid device, * retrieve and open the matching hidraw node, @@ -866,6 +971,8 @@ void serial_test_hid_bpf(void) ASSERT_OK(err, "hid_change_report"); err = test_hid_user_raw_request_call(uhid_fd, dev_id); ASSERT_OK(err, "hid_change_report"); + err = test_hid_attach_flags(uhid_fd, dev_id); + ASSERT_OK(err, "hid_user_raw_request");
/* * this test should be run last because we disconnect/reconnect diff --git a/tools/testing/selftests/bpf/progs/hid.c b/tools/testing/selftests/bpf/progs/hid.c index eda9306e6d7f..43724fd26fb9 100644 --- a/tools/testing/selftests/bpf/progs/hid.c +++ b/tools/testing/selftests/bpf/progs/hid.c @@ -21,6 +21,7 @@ extern int hid_bpf_hw_request(struct hid_bpf_ctx *ctx, struct attach_prog_args { int prog_fd; unsigned int hid; + unsigned int flags; int retval; };
@@ -60,7 +61,7 @@ int attach_prog(struct attach_prog_args *ctx) { ctx->retval = hid_bpf_attach_prog(ctx->hid, ctx->prog_fd, - 0); + ctx->flags); return 0; }
@@ -168,3 +169,54 @@ int BPF_PROG(hid_rdesc_fixup, struct hid_bpf_ctx *hid_ctx)
return sizeof(rdesc) + 73; } + +SEC("?fmod_ret/hid_bpf_device_event") +int BPF_PROG(hid_test_insert1, struct hid_bpf_ctx *hid_ctx) +{ + __u8 *data = hid_bpf_get_data(hid_ctx, 0 /* offset */, 4 /* size */); + + if (!data) + return 0; /* EPERM check */ + + /* we need to be run first */ + if (data[2] || data[3]) + return -1; + + data[1] = 1; + + return 0; +} + +SEC("?fmod_ret/hid_bpf_device_event") +int BPF_PROG(hid_test_insert2, struct hid_bpf_ctx *hid_ctx) +{ + __u8 *data = hid_bpf_get_data(hid_ctx, 0 /* offset */, 4 /* size */); + + if (!data) + return 0; /* EPERM check */ + + /* after insert0 and before insert2 */ + if (!data[1] || data[3]) + return -1; + + data[2] = 2; + + return 0; +} + +SEC("?fmod_ret/hid_bpf_device_event") +int BPF_PROG(hid_test_insert3, struct hid_bpf_ctx *hid_ctx) +{ + __u8 *data = hid_bpf_get_data(hid_ctx, 0 /* offset */, 4 /* size */); + + if (!data) + return 0; /* EPERM check */ + + /* at the end */ + if (!data[1] || !data[2]) + return -1; + + data[3] = 3; + + return 0; +}