Add testing for the new arena bitmap data structure. Acked-by: Ihor Solodrai Signed-off-by: Emil Tsalapatis --- .../bpf/libarena/selftests/test_bitmap.bpf.c | 394 ++++++++++++++++++ 1 file changed, 394 insertions(+) create mode 100644 tools/testing/selftests/bpf/libarena/selftests/test_bitmap.bpf.c diff --git a/tools/testing/selftests/bpf/libarena/selftests/test_bitmap.bpf.c b/tools/testing/selftests/bpf/libarena/selftests/test_bitmap.bpf.c new file mode 100644 index 000000000000..e7d32f44d687 --- /dev/null +++ b/tools/testing/selftests/bpf/libarena/selftests/test_bitmap.bpf.c @@ -0,0 +1,394 @@ +#include + +#include +#include + +#define TEST_BITS (2 * BITS_PER_LONG_LONG) +#define TEST_WORDS BITS_TO_LONG_LONGS(TEST_BITS) +#define MID_BIT (BITS_PER_LONG_LONG + 1) +#define LAST_BIT (TEST_BITS - 1) + +static void test_bmp_setall(struct bitmap __arena *bmp) +{ + volatile u32 i; + + for (i = zero; i < TEST_WORDS && can_loop; i++) + bmp->bits[i] = ~0ULL; +} + +SEC("syscall") +__weak int test_bitmap_alloc_free(void) +{ + struct bitmap __arena *bmp; + + bmp = bmp_alloc(TEST_BITS); + if (!bmp) + return -ENOMEM; + + if (!bmp_empty(TEST_BITS, bmp)) + goto err; + + __bmp_set_bit(LAST_BIT, bmp); + if (!bmp_test_bit(LAST_BIT, bmp)) + goto err; + + __bmp_clear_bit(LAST_BIT, bmp); + if (bmp_test_bit(LAST_BIT, bmp)) + goto err; + + bmp_free(bmp); + return 0; + +err: + bmp_free(bmp); + return -EINVAL; +} + +SEC("syscall") +__weak int test_bitmap_bit_ops(void) +{ + struct bitmap __arena *bmp; + + bmp = bmp_alloc(TEST_BITS); + if (!bmp) + return -ENOMEM; + + __bmp_set_bit(0, bmp); + if (!bmp_test_bit(0, bmp)) + goto err; + + __bmp_set_bit(MID_BIT, bmp); + if (!bmp_test_bit(MID_BIT, bmp)) + goto err; + + __bmp_set_bit(LAST_BIT, bmp); + if (!bmp_test_bit(LAST_BIT, bmp)) + goto err; + + if (bmp_test_bit(MID_BIT - 1, bmp)) + goto err; + + __bmp_clear_bit(MID_BIT, bmp); + if (bmp_test_bit(MID_BIT, bmp)) + goto err; + + if (!bmp_test_bit(0, bmp)) + goto err; + + if (!bmp_test_bit(LAST_BIT, bmp)) + goto err; + + __bmp_clear_bit(0, bmp); + __bmp_clear_bit(LAST_BIT, bmp); + if (!bmp_empty(TEST_BITS, bmp)) + goto err; + + if (bmp->bits[0]) + goto err; + + if (bmp->bits[1]) + goto err; + + bmp_free(bmp); + return 0; + +err: + bmp_free(bmp); + return -EINVAL; +} + +static bool test_bitmap_test_and_clear_single(struct bitmap __arena *bmp, size_t ind) +{ + if (bmp_test_and_clear_bit(ind, bmp)) + return false; + + __bmp_set_bit(ind, bmp); + + if (!bmp_test_and_clear_bit(ind, bmp)) + return false; + + if (bmp_test_bit(ind, bmp)) + return false; + + if (bmp_test_and_clear_bit(ind, bmp)) + return false; + + return true; +} + +static bool test_bitmap_test_and_set_single(struct bitmap __arena *bmp, size_t ind) +{ + if (bmp_test_and_set_bit(ind, bmp)) + return false; + + if (!bmp_test_and_set_bit(ind, bmp)) + return false; + + if (!bmp_test_bit(ind, bmp)) + return false; + + __bmp_clear_bit(ind, bmp); + + if (bmp_test_and_set_bit(ind, bmp)) + return false; + + return true; +} + +SEC("syscall") +__weak int test_bitmap_test_and_clear_bit(void) +{ + struct bitmap __arena *bmp; + + bmp = bmp_alloc(TEST_BITS); + if (!bmp) + return -ENOMEM; + + if (!test_bitmap_test_and_clear_single(bmp, 0)) + goto err; + + if (!test_bitmap_test_and_clear_single(bmp, MID_BIT)) + goto err; + + if (!test_bitmap_test_and_clear_single(bmp, LAST_BIT)) + goto err; + + if (!bmp_empty(TEST_BITS, bmp)) + goto err; + + bmp_free(bmp); + return 0; + +err: + bmp_free(bmp); + return -EINVAL; +} + +SEC("syscall") +__weak int test_bitmap_test_and_set_bit(void) +{ + struct bitmap __arena *bmp; + + bmp = bmp_alloc(TEST_BITS); + if (!bmp) + return -ENOMEM; + + if (!test_bitmap_test_and_set_single(bmp, 0)) + goto err; + + if (!test_bitmap_test_and_set_single(bmp, MID_BIT)) + goto err; + + if (!test_bitmap_test_and_set_single(bmp, LAST_BIT)) + goto err; + + bmp_free(bmp); + return 0; + +err: + bmp_free(bmp); + return -EINVAL; +} + + +SEC("syscall") +__weak int test_bitmap_and(void) +{ + struct bitmap __arena *src1 = NULL, *src2 = NULL, *dst = NULL; + + src1 = bmp_alloc(TEST_BITS); + src2 = bmp_alloc(TEST_BITS); + dst = bmp_alloc(TEST_BITS); + if (!src1 || !src2 || !dst) + goto err; + + test_bmp_setall(dst); + + __bmp_set_bit(0, src1); + __bmp_set_bit(MID_BIT, src1); + __bmp_set_bit(LAST_BIT, src1); + + __bmp_set_bit(MID_BIT, src2); + __bmp_set_bit(LAST_BIT, src2); + + bmp_and(TEST_BITS, dst, src1, src2); + + if (bmp_test_bit(0, dst)) + goto err; + if (!bmp_test_bit(MID_BIT, dst)) + goto err; + if (!bmp_test_bit(LAST_BIT, dst)) + goto err; + + if (dst->bits[0]) + goto err; + if (dst->bits[1] != (BIT_MASK(MID_BIT) | BIT_MASK(LAST_BIT))) + goto err; + + bmp_free(src1); + bmp_free(src2); + bmp_free(dst); + return 0; + +err: + bmp_free(src1); + bmp_free(src2); + bmp_free(dst); + return -EINVAL; +} + +SEC("syscall") +__weak int test_bitmap_or(void) +{ + struct bitmap __arena *src1 = NULL, *src2 = NULL, *dst = NULL; + + src1 = bmp_alloc(TEST_BITS); + src2 = bmp_alloc(TEST_BITS); + dst = bmp_alloc(TEST_BITS); + if (!src1 || !src2 || !dst) + goto err; + + test_bmp_setall(dst); + + __bmp_set_bit(0, src1); + __bmp_set_bit(LAST_BIT, src1); + + __bmp_set_bit(MID_BIT, src2); + __bmp_set_bit(LAST_BIT, src2); + + bmp_or(TEST_BITS, dst, src1, src2); + + if (!bmp_test_bit(0, dst)) + goto err; + if (!bmp_test_bit(MID_BIT, dst)) + goto err; + if (!bmp_test_bit(LAST_BIT, dst)) + goto err; + + if (dst->bits[0] != BIT_MASK(0)) + goto err; + if (dst->bits[1] != (BIT_MASK(MID_BIT) | BIT_MASK(LAST_BIT))) + goto err; + + bmp_free(src1); + bmp_free(src2); + bmp_free(dst); + return 0; + +err: + bmp_free(src1); + bmp_free(src2); + bmp_free(dst); + return -EINVAL; +} + +SEC("syscall") +__weak int test_bitmap_subset(void) +{ + struct bitmap __arena *big = NULL, *small = NULL; + + big = bmp_alloc(TEST_BITS); + small = bmp_alloc(TEST_BITS); + if (!big || !small) + goto err; + + if (!bmp_subset(TEST_BITS, big, small)) + goto err; + + __bmp_set_bit(0, small); + if (bmp_subset(TEST_BITS, big, small)) + goto err; + + __bmp_set_bit(0, big); + if (!bmp_subset(TEST_BITS, big, small)) + goto err; + + __bmp_set_bit(LAST_BIT, small); + if (bmp_subset(TEST_BITS, big, small)) + goto err; + + __bmp_set_bit(LAST_BIT, big); + __bmp_set_bit(MID_BIT, big); + if (!bmp_subset(TEST_BITS, big, small)) + goto err; + + if (bmp_subset(TEST_BITS, small, big)) + goto err; + + bmp_free(big); + bmp_free(small); + return 0; + +err: + bmp_free(big); + bmp_free(small); + return -EINVAL; + +} + +SEC("syscall") +__weak int test_bitmap_intersects(void) +{ + struct bitmap __arena *arg1 = NULL, *arg2 = NULL; + + arg1 = bmp_alloc(TEST_BITS); + arg2 = bmp_alloc(TEST_BITS); + if (!arg1 || !arg2) + goto err; + + if (bmp_intersects(TEST_BITS, arg1, arg2)) + goto err; + + __bmp_set_bit(0, arg1); + __bmp_set_bit(MID_BIT, arg2); + if (bmp_intersects(TEST_BITS, arg1, arg2)) + goto err; + + __bmp_set_bit(LAST_BIT, arg1); + __bmp_set_bit(LAST_BIT, arg2); + if (!bmp_intersects(TEST_BITS, arg1, arg2)) + goto err; + + bmp_free(arg1); + bmp_free(arg2); + return 0; + +err: + bmp_free(arg1); + bmp_free(arg2); + return -EINVAL; +} + +SEC("syscall") +__weak int test_bitmap_copy(void) +{ + struct bitmap __arena *arg1 = NULL, *arg2 = NULL; + + arg1 = bmp_alloc(TEST_BITS); + arg2 = bmp_alloc(TEST_BITS); + if (!arg1 || !arg2) + goto err; + + __bmp_set_bit(0, arg1); + __bmp_set_bit(MID_BIT, arg1); + + /* Make sure those get overwritten. */ + __bmp_set_bit(1, arg2); + __bmp_set_bit(MID_BIT + 2, arg2); + + bmp_copy(TEST_BITS, arg2, arg1); + + /* Bitmaps are equal if a subset of each other. */ + if (!bmp_subset(TEST_BITS, arg1, arg2) || + !bmp_subset(TEST_BITS, arg2, arg1)) + goto err; + + bmp_free(arg1); + bmp_free(arg2); + return 0; + +err: + bmp_free(arg1); + bmp_free(arg2); + return -EINVAL; +} -- 2.54.0