Tests are split in two parts.
The `bpf_insn_set_ops` test checks that the map is managed properly:
* Incorrect instruction indexes are rejected
* Non-sorted and non-unique indexes are rejected
* Unfrozen maps are not accepted
* Two programs can't use the same map
* BPF progs can't operate the map
The `bpf_insn_set_reloc` part validates, as best as it can do it from user
space, that instructions are relocated properly:
* no relocations => map is the same
* expected relocations when instructions are added
* expected relocations when instructions are deleted
* expected relocations when multiple functions are present
Signed-off-by: Anton Protopopov <aspsk@xxxxxxxxxxxxx>
---
.../selftests/bpf/prog_tests/bpf_insn_set.c | 639 ++++++++++++++++++
1 file changed, 639 insertions(+)
create mode 100644 tools/testing/selftests/bpf/prog_tests/bpf_insn_set.c
diff --git a/tools/testing/selftests/bpf/prog_tests/bpf_insn_set.c b/tools/testing/selftests/bpf/prog_tests/bpf_insn_set.c
new file mode 100644
index 000000000000..796980bd4fcb
--- /dev/null
+++ b/tools/testing/selftests/bpf/prog_tests/bpf_insn_set.c
@@ -0,0 +1,639 @@
+// SPDX-License-Identifier: GPL-2.0
+
+#include <bpf/bpf.h>
+#include <test_progs.h>
+
+static inline int map_create(__u32 map_type, __u32 max_entries)
+{
+ const char *map_name = "insn_set";
+ __u32 key_size = 4;
+ __u32 value_size = 4;
+
+ return bpf_map_create(map_type, map_name, key_size, value_size, max_entries, NULL);
+}
+
+/*
+ * Load a program, which will not be anyhow mangled by the verifier. Add an
+ * insn_set map pointing to every instruction. Check that it hasn't changed
+ * after the program load.
+ */
+static void check_one_to_one_mapping(void)
+{
+ struct bpf_insn insns[] = {
+ BPF_MOV64_IMM(BPF_REG_0, 4),
+ BPF_MOV64_IMM(BPF_REG_0, 3),
+ BPF_MOV64_IMM(BPF_REG_0, 2),
+ BPF_MOV64_IMM(BPF_REG_0, 1),
+ BPF_MOV64_IMM(BPF_REG_0, 0),
+ BPF_EXIT_INSN(),
+ };
+ int prog_fd, map_fd;
+ union bpf_attr attr = {
+ .prog_type = BPF_PROG_TYPE_XDP, /* we don't care */
+ .insns = ptr_to_u64(insns),
+ .insn_cnt = ARRAY_SIZE(insns),
+ .license = ptr_to_u64("GPL"),
+ .fd_array = ptr_to_u64(&map_fd),
+ .fd_array_cnt = 1,
+ };
+ int i;
+
+ map_fd = map_create(BPF_MAP_TYPE_INSN_SET, ARRAY_SIZE(insns));
+ if (!ASSERT_GE(map_fd, 0, "map_create"))
+ return;
+
+ for (i = 0; i < ARRAY_SIZE(insns); i++)
+ if (!ASSERT_EQ(bpf_map_update_elem(map_fd, &i, &i, 0), 0, "bpf_map_update_elem"))
+ goto cleanup;
+
+ if (!ASSERT_EQ(bpf_map_freeze(map_fd), 0, "bpf_map_freeze"))
+ return;
+
+ prog_fd = syscall(__NR_bpf, BPF_PROG_LOAD, &attr, sizeof(attr));
+ if (!ASSERT_GE(prog_fd, 0, "bpf(BPF_PROG_LOAD)"))
+ goto cleanup;
+
+ for (i = 0; i < ARRAY_SIZE(insns); i++) {
+ __u32 val;
+
+ if (!ASSERT_EQ(bpf_map_lookup_elem(map_fd, &i, &val), 0, "bpf_map_lookup_elem"))
+ goto cleanup;
+
+ ASSERT_EQ(val, i, "val should be equal i");
+ }
+
+cleanup:
+ close(prog_fd);
+ close(map_fd);
+}
+
+/*
+ * Try to load a program with a map which points to outside of the program
+ */
+static void check_out_of_bounds_index(void)
+{
+ struct bpf_insn insns[] = {
+ BPF_MOV64_IMM(BPF_REG_0, 4),
+ BPF_MOV64_IMM(BPF_REG_0, 3),
+ BPF_MOV64_IMM(BPF_REG_0, 2),
+ BPF_MOV64_IMM(BPF_REG_0, 1),
+ BPF_MOV64_IMM(BPF_REG_0, 0),
+ BPF_EXIT_INSN(),
+ };
+ int prog_fd, map_fd;
+ union bpf_attr attr = {
+ .prog_type = BPF_PROG_TYPE_XDP, /* we don't care */
+ .insns = ptr_to_u64(insns),
+ .insn_cnt = ARRAY_SIZE(insns),
+ .license = ptr_to_u64("GPL"),
+ .fd_array = ptr_to_u64(&map_fd),
+ .fd_array_cnt = 1,
+ };
+ int key, val;
+
+ map_fd = map_create(BPF_MAP_TYPE_INSN_SET, 1);
+ if (!ASSERT_GE(map_fd, 0, "map_create"))
+ return;
+
+ key = 0;
+ val = ARRAY_SIZE(insns); /* too big */
+ if (!ASSERT_EQ(bpf_map_update_elem(map_fd, &key, &val, 0), 0, "bpf_map_update_elem"))
+ goto cleanup;
+
+ if (!ASSERT_EQ(bpf_map_freeze(map_fd), 0, "bpf_map_freeze"))
+ goto cleanup;
+
+ errno = 0;
+ prog_fd = syscall(__NR_bpf, BPF_PROG_LOAD, &attr, sizeof(attr));
+ if (!ASSERT_EQ(prog_fd, -1, "program should have been rejected (prog_fd != -1)"))
+ goto cleanup;
+ if (!ASSERT_EQ(errno, EINVAL, "program should have been rejected (errno != EINVAL)"))
+ goto cleanup;
+
+cleanup:
+ close(map_fd);
+}
+
+/*
+ * Try to load a program with a map which points to the middle of 16-bit insn
+ */
+static void check_mid_insn_index(void)
+{
+ struct bpf_insn insns[] = {
+ BPF_LD_IMM64(BPF_REG_0, 0), /* 2 x 8 */
+ BPF_EXIT_INSN(),
+ };
+ int prog_fd, map_fd;
+ union bpf_attr attr = {
+ .prog_type = BPF_PROG_TYPE_XDP, /* we don't care */
+ .insns = ptr_to_u64(insns),
+ .insn_cnt = ARRAY_SIZE(insns),
+ .license = ptr_to_u64("GPL"),
+ .fd_array = ptr_to_u64(&map_fd),
+ .fd_array_cnt = 1,
+ };
+ int key, val;
+
+ map_fd = map_create(BPF_MAP_TYPE_INSN_SET, 1);
+ if (!ASSERT_GE(map_fd, 0, "map_create"))
+ return;
+
+ key = 0;
+ val = 1; /* middle of 16-byte instruction */
+ if (!ASSERT_EQ(bpf_map_update_elem(map_fd, &key, &val, 0), 0, "bpf_map_update_elem"))
+ goto cleanup;
+
+ if (!ASSERT_EQ(bpf_map_freeze(map_fd), 0, "bpf_map_freeze"))
+ goto cleanup;
+
+ errno = 0;
+ prog_fd = syscall(__NR_bpf, BPF_PROG_LOAD, &attr, sizeof(attr));
+ if (!ASSERT_EQ(prog_fd, -1, "program should have been rejected (prog_fd != -1)"))
+ goto cleanup;
+ if (!ASSERT_EQ(errno, EINVAL, "program should have been rejected (errno != EINVAL)"))
+ goto cleanup;
+
+cleanup:
+ close(map_fd);
+}
+
+static void check_incorrect_index(void)
+{
+ check_out_of_bounds_index();
+ check_mid_insn_index();
+}
+
+static void check_not_sorted(void)
+{
+ struct bpf_insn insns[] = {
+ BPF_MOV64_IMM(BPF_REG_0, 4),
+ BPF_MOV64_IMM(BPF_REG_0, 3),
+ BPF_MOV64_IMM(BPF_REG_0, 2),
+ BPF_MOV64_IMM(BPF_REG_0, 1),
+ BPF_MOV64_IMM(BPF_REG_0, 0),
+ BPF_EXIT_INSN(),
+ };
+ int prog_fd, map_fd;
+ union bpf_attr attr = {
+ .prog_type = BPF_PROG_TYPE_XDP, /* we don't care */
+ .insns = ptr_to_u64(insns),
+ .insn_cnt = ARRAY_SIZE(insns),
+ .license = ptr_to_u64("GPL"),
+ .fd_array = ptr_to_u64(&map_fd),
+ .fd_array_cnt = 1,
+ };
+ int i, val;
+
+ map_fd = map_create(BPF_MAP_TYPE_INSN_SET, ARRAY_SIZE(insns));
+ if (!ASSERT_GE(map_fd, 0, "map_create"))
+ return;
+
+ for (i = 0; i < ARRAY_SIZE(insns); i++) {
+ val = ARRAY_SIZE(insns) - i - 1; /* reverse indexes */
+ if (!ASSERT_EQ(bpf_map_update_elem(map_fd, &i, &val, 0), 0, "bpf_map_update_elem"))
+ goto cleanup;
+ }
+
+ if (!ASSERT_EQ(bpf_map_freeze(map_fd), 0, "bpf_map_freeze"))
+ goto cleanup;
+
+ errno = 0;
+ prog_fd = syscall(__NR_bpf, BPF_PROG_LOAD, &attr, sizeof(attr));
+ if (!ASSERT_EQ(prog_fd, -1, "program should have been rejected (prog_fd != -1)"))
+ goto cleanup;
+ if (!ASSERT_EQ(errno, EINVAL, "program should have been rejected (errno != EINVAL)"))
+ goto cleanup;
+
+cleanup:
+ close(map_fd);
+}
+
+static void check_not_unique(void)
+{
+ struct bpf_insn insns[] = {
+ BPF_MOV64_IMM(BPF_REG_0, 4),
+ BPF_MOV64_IMM(BPF_REG_0, 3),
+ BPF_MOV64_IMM(BPF_REG_0, 2),
+ BPF_MOV64_IMM(BPF_REG_0, 1),
+ BPF_MOV64_IMM(BPF_REG_0, 0),
+ BPF_EXIT_INSN(),
+ };
+ int prog_fd, map_fd;
+ union bpf_attr attr = {
+ .prog_type = BPF_PROG_TYPE_XDP, /* we don't care */
+ .insns = ptr_to_u64(insns),
+ .insn_cnt = ARRAY_SIZE(insns),
+ .license = ptr_to_u64("GPL"),
+ .fd_array = ptr_to_u64(&map_fd),
+ .fd_array_cnt = 1,
+ };
+ int i, val;
+
+ map_fd = map_create(BPF_MAP_TYPE_INSN_SET, ARRAY_SIZE(insns));
+ if (!ASSERT_GE(map_fd, 0, "map_create"))
+ return;
+
+ for (i = 0; i < ARRAY_SIZE(insns); i++) {
+ val = 1;
+ if (!ASSERT_EQ(bpf_map_update_elem(map_fd, &i, &val, 0), 0, "bpf_map_update_elem"))
+ goto cleanup;
+ }
+
+ if (!ASSERT_EQ(bpf_map_freeze(map_fd), 0, "bpf_map_freeze"))
+ goto cleanup;
+
+ errno = 0;
+ prog_fd = syscall(__NR_bpf, BPF_PROG_LOAD, &attr, sizeof(attr));
+ if (!ASSERT_EQ(prog_fd, -1, "program should have been rejected (prog_fd != -1)"))
+ goto cleanup;
+ if (!ASSERT_EQ(errno, EINVAL, "program should have been rejected (errno != EINVAL)"))
+ goto cleanup;
+
+cleanup:
+ close(map_fd);
+}
+
+static void check_not_sorted_or_unique(void)
+{
+ check_not_sorted();
+ check_not_unique();
+}
+
+/*
+ * Load a program with two patches (get jiffies, for simplicity). Add an
+ * insn_set map pointing to every instruction. Check how it was relocated
+ * after the program load.
+ */
+static void check_relocate_simple(void)
+{
+ struct bpf_insn insns[] = {
+ BPF_MOV64_IMM(BPF_REG_0, 2),
+ BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0, BPF_FUNC_jiffies64),
+ BPF_MOV64_IMM(BPF_REG_0, 1),
+ BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0, BPF_FUNC_jiffies64),
+ BPF_MOV64_IMM(BPF_REG_0, 0),
+ BPF_EXIT_INSN(),
+ };
+ int prog_fd, map_fd;
+ union bpf_attr attr = {
+ .prog_type = BPF_PROG_TYPE_XDP, /* we don't care */
+ .insns = ptr_to_u64(insns),
+ .insn_cnt = ARRAY_SIZE(insns),
+ .license = ptr_to_u64("GPL"),
+ .fd_array = ptr_to_u64(&map_fd),
+ .fd_array_cnt = 1,
+ };
+ __u32 map_in[] = {0, 1, 2, 3, 4, 5};
+ __u32 map_out[] = {0, 1, 4, 5, 8, 9};
+ int i;
+
+ map_fd = map_create(BPF_MAP_TYPE_INSN_SET, ARRAY_SIZE(insns));
+ if (!ASSERT_GE(map_fd, 0, "map_create"))
+ return;
+
+ for (i = 0; i < ARRAY_SIZE(insns); i++)
+ if (!ASSERT_EQ(bpf_map_update_elem(map_fd, &i, &map_in[i], 0), 0,
+ "bpf_map_update_elem"))
+ goto cleanup;
+
+ if (!ASSERT_EQ(bpf_map_freeze(map_fd), 0, "bpf_map_freeze"))
+ return;
+
+ prog_fd = syscall(__NR_bpf, BPF_PROG_LOAD, &attr, sizeof(attr));
+ if (!ASSERT_GE(prog_fd, 0, "bpf(BPF_PROG_LOAD)"))
+ goto cleanup;
+
+ for (i = 0; i < ARRAY_SIZE(insns); i++) {
+ __u32 val;
+
+ if (!ASSERT_EQ(bpf_map_lookup_elem(map_fd, &i, &val), 0, "bpf_map_lookup_elem"))
+ goto cleanup;
+
+ ASSERT_EQ(val, map_out[i], "val should be equal map_out[i]");
+ }
+
+cleanup:
+ close(prog_fd);
+ close(map_fd);
+}
+
+/*
+ * Verifier can delete code in two cases: nops & dead code. From the relocation
+ * point of view, the two cases look the same, so test using the simplest
+ * method: by loading some nops
+ */
+static void check_relocate_deletions(void)
+{
+ struct bpf_insn insns[] = {
+ BPF_MOV64_IMM(BPF_REG_0, 2),
+ BPF_JMP_IMM(BPF_JA, 0, 0, 0), /* nop */
+ BPF_MOV64_IMM(BPF_REG_0, 1),
+ BPF_JMP_IMM(BPF_JA, 0, 0, 0), /* nop */
+ BPF_MOV64_IMM(BPF_REG_0, 0),
+ BPF_EXIT_INSN(),
+ };
+ int prog_fd, map_fd;
+ union bpf_attr attr = {
+ .prog_type = BPF_PROG_TYPE_XDP, /* we don't care */
+ .insns = ptr_to_u64(insns),
+ .insn_cnt = ARRAY_SIZE(insns),
+ .license = ptr_to_u64("GPL"),
+ .fd_array = ptr_to_u64(&map_fd),
+ .fd_array_cnt = 1,
+ };
+ __u32 map_in[] = {0, 1, 2, 3, 4, 5};
+ __u32 map_out[] = {0, -1, 1, -1, 2, 3};
+ int i;
+
+ map_fd = map_create(BPF_MAP_TYPE_INSN_SET, ARRAY_SIZE(insns));
+ if (!ASSERT_GE(map_fd, 0, "map_create"))
+ return;
+
+ for (i = 0; i < ARRAY_SIZE(insns); i++)
+ if (!ASSERT_EQ(bpf_map_update_elem(map_fd, &i, &map_in[i], 0), 0,
+ "bpf_map_update_elem"))
+ goto cleanup;
+
+ if (!ASSERT_EQ(bpf_map_freeze(map_fd), 0, "bpf_map_freeze"))
+ return;
+
+ prog_fd = syscall(__NR_bpf, BPF_PROG_LOAD, &attr, sizeof(attr));
+ if (!ASSERT_GE(prog_fd, 0, "bpf(BPF_PROG_LOAD)"))
+ goto cleanup;
+
+ for (i = 0; i < ARRAY_SIZE(insns); i++) {
+ __u32 val;
+
+ if (!ASSERT_EQ(bpf_map_lookup_elem(map_fd, &i, &val), 0, "bpf_map_lookup_elem"))
+ goto cleanup;
+
+ ASSERT_EQ(val, map_out[i], "val should be equal map_out[i]");
+ }
+
+cleanup:
+ close(prog_fd);
+ close(map_fd);
+}
+
+static void check_relocate_with_functions(void)
+{
+ struct bpf_insn insns[] = {
+ BPF_JMP_IMM(BPF_JA, 0, 0, 0), /* nop */
+ BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0, BPF_FUNC_jiffies64),
+ BPF_JMP_IMM(BPF_JA, 0, 0, 0), /* nop */
+ BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 1, 0, 2),
+ BPF_MOV64_IMM(BPF_REG_0, 1),
+ BPF_EXIT_INSN(),
+ BPF_JMP_IMM(BPF_JA, 0, 0, 0), /* nop */
+ BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0, BPF_FUNC_jiffies64),
+ BPF_JMP_IMM(BPF_JA, 0, 0, 0), /* nop */
+ BPF_MOV64_IMM(BPF_REG_0, 2),
+ BPF_EXIT_INSN(),
+ };
+ int prog_fd, map_fd;
+ union bpf_attr attr = {
+ .prog_type = BPF_PROG_TYPE_XDP, /* we don't care */
+ .insns = ptr_to_u64(insns),
+ .insn_cnt = ARRAY_SIZE(insns),
+ .license = ptr_to_u64("GPL"),
+ .fd_array = ptr_to_u64(&map_fd),
+ .fd_array_cnt = 1,
+ };
+ __u32 map_in[] = { 0, 1, 2, 3, 4, 5, /* func */ 6, 7, 8, 9, 10};
+ __u32 map_out[] = {-1, 0, -1, 3, 4, 5, /* func */ -1, 6, -1, 9, 10};
+ int i;
+
+ map_fd = map_create(BPF_MAP_TYPE_INSN_SET, ARRAY_SIZE(insns));
+ if (!ASSERT_GE(map_fd, 0, "map_create"))
+ return;
+
+ for (i = 0; i < ARRAY_SIZE(insns); i++)
+ if (!ASSERT_EQ(bpf_map_update_elem(map_fd, &i, &map_in[i], 0), 0,
+ "bpf_map_update_elem"))
+ goto cleanup;
+
+ if (!ASSERT_EQ(bpf_map_freeze(map_fd), 0, "bpf_map_freeze"))
+ goto cleanup;
+
+ prog_fd = syscall(__NR_bpf, BPF_PROG_LOAD, &attr, sizeof(attr));
+ if (!ASSERT_GE(prog_fd, 0, "bpf(BPF_PROG_LOAD)"))
+ goto cleanup;
+
+ for (i = 0; i < ARRAY_SIZE(insns); i++) {
+ __u32 val;
+
+ if (!ASSERT_EQ(bpf_map_lookup_elem(map_fd, &i, &val), 0, "bpf_map_lookup_elem"))
+ goto cleanup;
+
+ ASSERT_EQ(val, map_out[i], "val should be equal map_out[i]");
+ }
+
+cleanup:
+ close(prog_fd);
+ close(map_fd);
+}
+
+/* Once map was initialized, it should be frozen */
+static void check_load_unfrozen_map(void)
+{
+ struct bpf_insn insns[] = {
+ BPF_MOV64_IMM(BPF_REG_0, 0),
+ BPF_EXIT_INSN(),
+ };
+ int prog_fd, map_fd;
+ union bpf_attr attr = {
+ .prog_type = BPF_PROG_TYPE_XDP, /* we don't care */
+ .insns = ptr_to_u64(insns),
+ .insn_cnt = ARRAY_SIZE(insns),
+ .license = ptr_to_u64("GPL"),
+ .fd_array = ptr_to_u64(&map_fd),
+ .fd_array_cnt = 1,
+ };
+ int i;
+
+ map_fd = map_create(BPF_MAP_TYPE_INSN_SET, ARRAY_SIZE(insns));
+ if (!ASSERT_GE(map_fd, 0, "map_create"))
+ return;
+
+ for (i = 0; i < ARRAY_SIZE(insns); i++)
+ if (!ASSERT_EQ(bpf_map_update_elem(map_fd, &i, &i, 0), 0, "bpf_map_update_elem"))
+ goto cleanup;
+
+ errno = 0;
+ prog_fd = syscall(__NR_bpf, BPF_PROG_LOAD, &attr, sizeof(attr));
+ if (!ASSERT_EQ(prog_fd, -1, "program should have been rejected (prog_fd != -1)"))
+ goto cleanup;
+ if (!ASSERT_EQ(errno, EINVAL, "program should have been rejected (errno != EINVAL)"))
+ goto cleanup;
+
+ /* cirrectness: now freeze the map, the program should load fine */
+
+ if (!ASSERT_EQ(bpf_map_freeze(map_fd), 0, "bpf_map_freeze"))
+ return;
+
+ prog_fd = syscall(__NR_bpf, BPF_PROG_LOAD, &attr, sizeof(attr));
+ if (!ASSERT_GE(prog_fd, 0, "bpf(BPF_PROG_LOAD)"))
+ goto cleanup;
+
+ for (i = 0; i < ARRAY_SIZE(insns); i++) {
+ __u32 val;
+
+ if (!ASSERT_EQ(bpf_map_lookup_elem(map_fd, &i, &val), 0, "bpf_map_lookup_elem"))
+ goto cleanup;
+
+ ASSERT_EQ(val, i, "val should be equal i");
+ }
+
+cleanup:
+ close(prog_fd);
+ close(map_fd);
+}
+
+/* Map can be used only by one BPF program */
+static void check_no_map_reuse(void)
+{
+ struct bpf_insn insns[] = {
+ BPF_MOV64_IMM(BPF_REG_0, 0),
+ BPF_EXIT_INSN(),
+ };
+ int prog_fd, map_fd, extra_fd;
+ union bpf_attr attr = {
+ .prog_type = BPF_PROG_TYPE_XDP, /* we don't care */
+ .insns = ptr_to_u64(insns),
+ .insn_cnt = ARRAY_SIZE(insns),
+ .license = ptr_to_u64("GPL"),
+ .fd_array = ptr_to_u64(&map_fd),
+ .fd_array_cnt = 1,
+ };
+ int i;
+
+ map_fd = map_create(BPF_MAP_TYPE_INSN_SET, ARRAY_SIZE(insns));
+ if (!ASSERT_GE(map_fd, 0, "map_create"))
+ return;
+
+ for (i = 0; i < ARRAY_SIZE(insns); i++)
+ if (!ASSERT_EQ(bpf_map_update_elem(map_fd, &i, &i, 0), 0, "bpf_map_update_elem"))
+ goto cleanup;
+
+ if (!ASSERT_EQ(bpf_map_freeze(map_fd), 0, "bpf_map_freeze"))
+ return;
+
+ prog_fd = syscall(__NR_bpf, BPF_PROG_LOAD, &attr, sizeof(attr));
+ if (!ASSERT_GE(prog_fd, 0, "bpf(BPF_PROG_LOAD)"))
+ goto cleanup;
+
+ for (i = 0; i < ARRAY_SIZE(insns); i++) {
+ __u32 val;
+
+ if (!ASSERT_EQ(bpf_map_lookup_elem(map_fd, &i, &val), 0, "bpf_map_lookup_elem"))
+ goto cleanup;
+
+ ASSERT_EQ(val, i, "val should be equal i");
+ }
+
+ errno = 0;
+ extra_fd = syscall(__NR_bpf, BPF_PROG_LOAD, &attr, sizeof(attr));
+ if (!ASSERT_EQ(extra_fd, -1, "program should have been rejected (extra_fd != -1)"))
+ goto cleanup;
+ if (!ASSERT_EQ(errno, EBUSY, "program should have been rejected (errno != EBUSY)"))
+ goto cleanup;
+
+ /* correctness: check that prog is still loadable without fd_array */
+ attr.fd_array_cnt = 0;
+ extra_fd = syscall(__NR_bpf, BPF_PROG_LOAD, &attr, sizeof(attr));
+ if (!ASSERT_GE(prog_fd, 0, "bpf(BPF_PROG_LOAD): expected no error"))
+ goto cleanup;
+ close(extra_fd);
+
+cleanup:
+ close(prog_fd);
+ close(map_fd);
+}
+
+static void check_bpf_no_lookup(void)
+{
+ struct bpf_insn insns[] = {
+ BPF_LD_MAP_FD(BPF_REG_1, 0),
+ BPF_ST_MEM(BPF_DW, BPF_REG_10, -8, 0),
+ BPF_MOV64_REG(BPF_REG_2, BPF_REG_10),
+ BPF_ALU64_IMM(BPF_ADD, BPF_REG_2, -8),
+ BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0, BPF_FUNC_map_lookup_elem),
+ BPF_EXIT_INSN(),
+ };
+ int prog_fd, map_fd;
+ union bpf_attr attr = {
+ .prog_type = BPF_PROG_TYPE_XDP, /* we don't care */
+ .insns = ptr_to_u64(insns),
+ .insn_cnt = ARRAY_SIZE(insns),
+ .license = ptr_to_u64("GPL"),
+ };
+
+ map_fd = map_create(BPF_MAP_TYPE_INSN_SET, 1);
+ if (!ASSERT_GE(map_fd, 0, "map_create"))
+ return;
+
+ /* otherwise will be rejected as unfrozen */
+ if (!ASSERT_EQ(bpf_map_freeze(map_fd), 0, "bpf_map_freeze"))
+ return;
+
+ insns[0].imm = map_fd;
+
+ errno = 0;
+ prog_fd = syscall(__NR_bpf, BPF_PROG_LOAD, &attr, sizeof(attr));
+ if (!ASSERT_EQ(prog_fd, -1, "program should have been rejected (prog_fd != -1)"))
+ goto cleanup;
+ if (!ASSERT_EQ(errno, EINVAL, "program should have been rejected (errno != EINVAL)"))
+ goto cleanup;
+
+ /* correctness: check that prog is still loadable with normal map */
+ close(map_fd);
+ map_fd = map_create(BPF_MAP_TYPE_ARRAY, 1);
+ insns[0].imm = map_fd;
+ prog_fd = syscall(__NR_bpf, BPF_PROG_LOAD, &attr, sizeof(attr));
+ if (!ASSERT_GE(prog_fd, 0, "bpf(BPF_PROG_LOAD)"))
+ goto cleanup;
+
+cleanup:
+ close(prog_fd);
+ close(map_fd);
+}
+
+static void check_bpf_side(void)
+{
+ check_bpf_no_lookup();
+}
+
+/* Test how relocations work */
+void test_bpf_insn_set_reloc(void)
+{
+ if (test__start_subtest("one2one"))
+ check_one_to_one_mapping();
+
+ if (test__start_subtest("relocate-simple"))
+ check_relocate_simple();
+
+ if (test__start_subtest("relocate-deletions"))
+ check_relocate_deletions();
+
+ if (test__start_subtest("relocate-multiple-functions"))
+ check_relocate_with_functions();
+}
+
+/* Check all kinds of operations and related restrictions */
+void test_bpf_insn_set_ops(void)
+{
+ if (test__start_subtest("incorrect-index"))
+ check_incorrect_index();
+
+ if (test__start_subtest("not-sorted-or-unique"))
+ check_not_sorted_or_unique();
+
+ if (test__start_subtest("load-unfrozen-map"))
+ check_load_unfrozen_map();
+
+ if (test__start_subtest("no-map-reuse"))
+ check_no_map_reuse();
+
+ if (test__start_subtest("bpf-side-ops"))
+ check_bpf_side();
+}
--
2.34.1
