diff options
Diffstat (limited to 'tools')
-rw-r--r-- | tools/include/linux/filter.h | 24 | ||||
-rw-r--r-- | tools/testing/selftests/Makefile | 3 | ||||
-rw-r--r-- | tools/testing/selftests/bpf/.gitignore | 2 | ||||
-rw-r--r-- | tools/testing/selftests/bpf/Makefile | 13 | ||||
-rw-r--r-- | tools/testing/selftests/bpf/bpf_sys.h | 108 | ||||
-rw-r--r-- | tools/testing/selftests/bpf/config | 5 | ||||
-rwxr-xr-x | tools/testing/selftests/bpf/test_kmod.sh | 39 | ||||
-rw-r--r-- | tools/testing/selftests/bpf/test_maps.c | 525 | ||||
-rw-r--r-- | tools/testing/selftests/bpf/test_verifier.c | 2836 | ||||
-rw-r--r-- | tools/testing/selftests/net/.gitignore | 1 | ||||
-rw-r--r-- | tools/testing/selftests/net/Makefile | 11 | ||||
-rw-r--r-- | tools/testing/selftests/net/reuseport_bpf_numa.c | 255 |
12 files changed, 3817 insertions, 5 deletions
diff --git a/tools/include/linux/filter.h b/tools/include/linux/filter.h index 3276625595b2..122153b16ea4 100644 --- a/tools/include/linux/filter.h +++ b/tools/include/linux/filter.h @@ -218,6 +218,30 @@ .off = OFF, \ .imm = IMM }) +/* BPF_LD_IMM64 macro encodes single 'load 64-bit immediate' insn */ + +#define BPF_LD_IMM64(DST, IMM) \ + BPF_LD_IMM64_RAW(DST, 0, IMM) + +#define BPF_LD_IMM64_RAW(DST, SRC, IMM) \ + ((struct bpf_insn) { \ + .code = BPF_LD | BPF_DW | BPF_IMM, \ + .dst_reg = DST, \ + .src_reg = SRC, \ + .off = 0, \ + .imm = (__u32) (IMM) }), \ + ((struct bpf_insn) { \ + .code = 0, /* zero is reserved opcode */ \ + .dst_reg = 0, \ + .src_reg = 0, \ + .off = 0, \ + .imm = ((__u64) (IMM)) >> 32 }) + +/* pseudo BPF_LD_IMM64 insn used to refer to process-local map_fd */ + +#define BPF_LD_MAP_FD(DST, MAP_FD) \ + BPF_LD_IMM64_RAW(DST, BPF_PSEUDO_MAP_FD, MAP_FD) + /* Program exit */ #define BPF_EXIT_INSN() \ diff --git a/tools/testing/selftests/Makefile b/tools/testing/selftests/Makefile index f770dba2a6f6..a3144a3de3a8 100644 --- a/tools/testing/selftests/Makefile +++ b/tools/testing/selftests/Makefile @@ -1,4 +1,5 @@ -TARGETS = breakpoints +TARGETS = bpf +TARGETS += breakpoints TARGETS += capabilities TARGETS += cpu-hotplug TARGETS += efivarfs diff --git a/tools/testing/selftests/bpf/.gitignore b/tools/testing/selftests/bpf/.gitignore new file mode 100644 index 000000000000..3c59f96e3ed8 --- /dev/null +++ b/tools/testing/selftests/bpf/.gitignore @@ -0,0 +1,2 @@ +test_verifier +test_maps diff --git a/tools/testing/selftests/bpf/Makefile b/tools/testing/selftests/bpf/Makefile new file mode 100644 index 000000000000..4761e2d65ab8 --- /dev/null +++ b/tools/testing/selftests/bpf/Makefile @@ -0,0 +1,13 @@ +CFLAGS += -Wall -O2 + +test_objs = test_verifier test_maps + +TEST_PROGS := test_verifier test_maps test_kmod.sh +TEST_FILES := $(test_objs) + +all: $(test_objs) + +include ../lib.mk + +clean: + $(RM) $(test_objs) diff --git a/tools/testing/selftests/bpf/bpf_sys.h b/tools/testing/selftests/bpf/bpf_sys.h new file mode 100644 index 000000000000..6b4565f2a3f2 --- /dev/null +++ b/tools/testing/selftests/bpf/bpf_sys.h @@ -0,0 +1,108 @@ +#ifndef __BPF_SYS__ +#define __BPF_SYS__ + +#include <stdint.h> +#include <stdlib.h> + +#include <sys/syscall.h> + +#include <linux/bpf.h> + +static inline __u64 bpf_ptr_to_u64(const void *ptr) +{ + return (__u64)(unsigned long) ptr; +} + +static inline int bpf(int cmd, union bpf_attr *attr, unsigned int size) +{ +#ifdef __NR_bpf + return syscall(__NR_bpf, cmd, attr, size); +#else + fprintf(stderr, "No bpf syscall, kernel headers too old?\n"); + errno = ENOSYS; + return -1; +#endif +} + +static inline int bpf_map_lookup(int fd, const void *key, void *value) +{ + union bpf_attr attr = {}; + + attr.map_fd = fd; + attr.key = bpf_ptr_to_u64(key); + attr.value = bpf_ptr_to_u64(value); + + return bpf(BPF_MAP_LOOKUP_ELEM, &attr, sizeof(attr)); +} + +static inline int bpf_map_update(int fd, const void *key, const void *value, + uint64_t flags) +{ + union bpf_attr attr = {}; + + attr.map_fd = fd; + attr.key = bpf_ptr_to_u64(key); + attr.value = bpf_ptr_to_u64(value); + attr.flags = flags; + + return bpf(BPF_MAP_UPDATE_ELEM, &attr, sizeof(attr)); +} + +static inline int bpf_map_delete(int fd, const void *key) +{ + union bpf_attr attr = {}; + + attr.map_fd = fd; + attr.key = bpf_ptr_to_u64(key); + + return bpf(BPF_MAP_DELETE_ELEM, &attr, sizeof(attr)); +} + +static inline int bpf_map_next_key(int fd, const void *key, void *next_key) +{ + union bpf_attr attr = {}; + + attr.map_fd = fd; + attr.key = bpf_ptr_to_u64(key); + attr.next_key = bpf_ptr_to_u64(next_key); + + return bpf(BPF_MAP_GET_NEXT_KEY, &attr, sizeof(attr)); +} + +static inline int bpf_map_create(enum bpf_map_type type, uint32_t size_key, + uint32_t size_value, uint32_t max_elem, + uint32_t flags) +{ + union bpf_attr attr = {}; + + attr.map_type = type; + attr.key_size = size_key; + attr.value_size = size_value; + attr.max_entries = max_elem; + attr.map_flags = flags; + + return bpf(BPF_MAP_CREATE, &attr, sizeof(attr)); +} + +static inline int bpf_prog_load(enum bpf_prog_type type, + const struct bpf_insn *insns, size_t size_insns, + const char *license, char *log, size_t size_log) +{ + union bpf_attr attr = {}; + + attr.prog_type = type; + attr.insns = bpf_ptr_to_u64(insns); + attr.insn_cnt = size_insns / sizeof(struct bpf_insn); + attr.license = bpf_ptr_to_u64(license); + + if (size_log > 0) { + attr.log_buf = bpf_ptr_to_u64(log); + attr.log_size = size_log; + attr.log_level = 1; + log[0] = 0; + } + + return bpf(BPF_PROG_LOAD, &attr, sizeof(attr)); +} + +#endif /* __BPF_SYS__ */ diff --git a/tools/testing/selftests/bpf/config b/tools/testing/selftests/bpf/config new file mode 100644 index 000000000000..52d53ed08769 --- /dev/null +++ b/tools/testing/selftests/bpf/config @@ -0,0 +1,5 @@ +CONFIG_BPF=y +CONFIG_BPF_SYSCALL=y +CONFIG_NET_CLS_BPF=m +CONFIG_BPF_EVENTS=y +CONFIG_TEST_BPF=m diff --git a/tools/testing/selftests/bpf/test_kmod.sh b/tools/testing/selftests/bpf/test_kmod.sh new file mode 100755 index 000000000000..92e627adf354 --- /dev/null +++ b/tools/testing/selftests/bpf/test_kmod.sh @@ -0,0 +1,39 @@ +#!/bin/bash + +SRC_TREE=../../../../ + +test_run() +{ + sysctl -w net.core.bpf_jit_enable=$1 2>&1 > /dev/null + sysctl -w net.core.bpf_jit_harden=$2 2>&1 > /dev/null + + echo "[ JIT enabled:$1 hardened:$2 ]" + dmesg -C + insmod $SRC_TREE/lib/test_bpf.ko 2> /dev/null + if [ $? -ne 0 ]; then + rc=1 + fi + rmmod test_bpf 2> /dev/null + dmesg | grep FAIL +} + +test_save() +{ + JE=`sysctl -n net.core.bpf_jit_enable` + JH=`sysctl -n net.core.bpf_jit_harden` +} + +test_restore() +{ + sysctl -w net.core.bpf_jit_enable=$JE 2>&1 > /dev/null + sysctl -w net.core.bpf_jit_harden=$JH 2>&1 > /dev/null +} + +rc=0 +test_save +test_run 0 0 +test_run 1 0 +test_run 1 1 +test_run 1 2 +test_restore +exit $rc diff --git a/tools/testing/selftests/bpf/test_maps.c b/tools/testing/selftests/bpf/test_maps.c new file mode 100644 index 000000000000..ee384f02cb6e --- /dev/null +++ b/tools/testing/selftests/bpf/test_maps.c @@ -0,0 +1,525 @@ +/* + * Testsuite for eBPF maps + * + * Copyright (c) 2014 PLUMgrid, http://plumgrid.com + * Copyright (c) 2016 Facebook + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of version 2 of the GNU General Public + * License as published by the Free Software Foundation. + */ + +#include <stdio.h> +#include <unistd.h> +#include <errno.h> +#include <string.h> +#include <assert.h> +#include <stdlib.h> + +#include <sys/wait.h> +#include <sys/resource.h> + +#include <linux/bpf.h> + +#include "bpf_sys.h" + +static int map_flags; + +static void test_hashmap(int task, void *data) +{ + long long key, next_key, value; + int fd; + + fd = bpf_map_create(BPF_MAP_TYPE_HASH, sizeof(key), sizeof(value), + 2, map_flags); + if (fd < 0) { + printf("Failed to create hashmap '%s'!\n", strerror(errno)); + exit(1); + } + + key = 1; + value = 1234; + /* Insert key=1 element. */ + assert(bpf_map_update(fd, &key, &value, BPF_ANY) == 0); + + value = 0; + /* BPF_NOEXIST means add new element if it doesn't exist. */ + assert(bpf_map_update(fd, &key, &value, BPF_NOEXIST) == -1 && + /* key=1 already exists. */ + errno == EEXIST); + + /* -1 is an invalid flag. */ + assert(bpf_map_update(fd, &key, &value, -1) == -1 && errno == EINVAL); + + /* Check that key=1 can be found. */ + assert(bpf_map_lookup(fd, &key, &value) == 0 && value == 1234); + + key = 2; + /* Check that key=2 is not found. */ + assert(bpf_map_lookup(fd, &key, &value) == -1 && errno == ENOENT); + + /* BPF_EXIST means update existing element. */ + assert(bpf_map_update(fd, &key, &value, BPF_EXIST) == -1 && + /* key=2 is not there. */ + errno == ENOENT); + + /* Insert key=2 element. */ + assert(bpf_map_update(fd, &key, &value, BPF_NOEXIST) == 0); + + /* key=1 and key=2 were inserted, check that key=0 cannot be + * inserted due to max_entries limit. + */ + key = 0; + assert(bpf_map_update(fd, &key, &value, BPF_NOEXIST) == -1 && + errno == E2BIG); + + /* Update existing element, though the map is full. */ + key = 1; + assert(bpf_map_update(fd, &key, &value, BPF_EXIST) == 0); + key = 2; + assert(bpf_map_update(fd, &key, &value, BPF_ANY) == 0); + key = 1; + assert(bpf_map_update(fd, &key, &value, BPF_ANY) == 0); + + /* Check that key = 0 doesn't exist. */ + key = 0; + assert(bpf_map_delete(fd, &key) == -1 && errno == ENOENT); + + /* Iterate over two elements. */ + assert(bpf_map_next_key(fd, &key, &next_key) == 0 && + (next_key == 1 || next_key == 2)); + assert(bpf_map_next_key(fd, &next_key, &next_key) == 0 && + (next_key == 1 || next_key == 2)); + assert(bpf_map_next_key(fd, &next_key, &next_key) == -1 && + errno == ENOENT); + + /* Delete both elements. */ + key = 1; + assert(bpf_map_delete(fd, &key) == 0); + key = 2; + assert(bpf_map_delete(fd, &key) == 0); + assert(bpf_map_delete(fd, &key) == -1 && errno == ENOENT); + + key = 0; + /* Check that map is empty. */ + assert(bpf_map_next_key(fd, &key, &next_key) == -1 && + errno == ENOENT); + + close(fd); +} + +static void test_hashmap_percpu(int task, void *data) +{ + unsigned int nr_cpus = sysconf(_SC_NPROCESSORS_CONF); + long long value[nr_cpus]; + long long key, next_key; + int expected_key_mask = 0; + int fd, i; + + fd = bpf_map_create(BPF_MAP_TYPE_PERCPU_HASH, sizeof(key), + sizeof(value[0]), 2, map_flags); + if (fd < 0) { + printf("Failed to create hashmap '%s'!\n", strerror(errno)); + exit(1); + } + + for (i = 0; i < nr_cpus; i++) + value[i] = i + 100; + + key = 1; + /* Insert key=1 element. */ + assert(!(expected_key_mask & key)); + assert(bpf_map_update(fd, &key, value, BPF_ANY) == 0); + expected_key_mask |= key; + + /* BPF_NOEXIST means add new element if it doesn't exist. */ + assert(bpf_map_update(fd, &key, value, BPF_NOEXIST) == -1 && + /* key=1 already exists. */ + errno == EEXIST); + + /* -1 is an invalid flag. */ + assert(bpf_map_update(fd, &key, value, -1) == -1 && errno == EINVAL); + + /* Check that key=1 can be found. Value could be 0 if the lookup + * was run from a different CPU. + */ + value[0] = 1; + assert(bpf_map_lookup(fd, &key, value) == 0 && value[0] == 100); + + key = 2; + /* Check that key=2 is not found. */ + assert(bpf_map_lookup(fd, &key, value) == -1 && errno == ENOENT); + + /* BPF_EXIST means update existing element. */ + assert(bpf_map_update(fd, &key, value, BPF_EXIST) == -1 && + /* key=2 is not there. */ + errno == ENOENT); + + /* Insert key=2 element. */ + assert(!(expected_key_mask & key)); + assert(bpf_map_update(fd, &key, value, BPF_NOEXIST) == 0); + expected_key_mask |= key; + + /* key=1 and key=2 were inserted, check that key=0 cannot be + * inserted due to max_entries limit. + */ + key = 0; + assert(bpf_map_update(fd, &key, value, BPF_NOEXIST) == -1 && + errno == E2BIG); + + /* Check that key = 0 doesn't exist. */ + assert(bpf_map_delete(fd, &key) == -1 && errno == ENOENT); + + /* Iterate over two elements. */ + while (!bpf_map_next_key(fd, &key, &next_key)) { + assert((expected_key_mask & next_key) == next_key); + expected_key_mask &= ~next_key; + + assert(bpf_map_lookup(fd, &next_key, value) == 0); + + for (i = 0; i < nr_cpus; i++) + assert(value[i] == i + 100); + + key = next_key; + } + assert(errno == ENOENT); + + /* Update with BPF_EXIST. */ + key = 1; + assert(bpf_map_update(fd, &key, value, BPF_EXIST) == 0); + + /* Delete both elements. */ + key = 1; + assert(bpf_map_delete(fd, &key) == 0); + key = 2; + assert(bpf_map_delete(fd, &key) == 0); + assert(bpf_map_delete(fd, &key) == -1 && errno == ENOENT); + + key = 0; + /* Check that map is empty. */ + assert(bpf_map_next_key(fd, &key, &next_key) == -1 && + errno == ENOENT); + + close(fd); +} + +static void test_arraymap(int task, void *data) +{ + int key, next_key, fd; + long long value; + + fd = bpf_map_create(BPF_MAP_TYPE_ARRAY, sizeof(key), sizeof(value), + 2, 0); + if (fd < 0) { + printf("Failed to create arraymap '%s'!\n", strerror(errno)); + exit(1); + } + + key = 1; + value = 1234; + /* Insert key=1 element. */ + assert(bpf_map_update(fd, &key, &value, BPF_ANY) == 0); + + value = 0; + assert(bpf_map_update(fd, &key, &value, BPF_NOEXIST) == -1 && + errno == EEXIST); + + /* Check that key=1 can be found. */ + assert(bpf_map_lookup(fd, &key, &value) == 0 && value == 1234); + + key = 0; + /* Check that key=0 is also found and zero initialized. */ + assert(bpf_map_lookup(fd, &key, &value) == 0 && value == 0); + + /* key=0 and key=1 were inserted, check that key=2 cannot be inserted + * due to max_entries limit. + */ + key = 2; + assert(bpf_map_update(fd, &key, &value, BPF_EXIST) == -1 && + errno == E2BIG); + + /* Check that key = 2 doesn't exist. */ + assert(bpf_map_lookup(fd, &key, &value) == -1 && errno == ENOENT); + + /* Iterate over two elements. */ + assert(bpf_map_next_key(fd, &key, &next_key) == 0 && + next_key == 0); + assert(bpf_map_next_key(fd, &next_key, &next_key) == 0 && + next_key == 1); + assert(bpf_map_next_key(fd, &next_key, &next_key) == -1 && + errno == ENOENT); + + /* Delete shouldn't succeed. */ + key = 1; + assert(bpf_map_delete(fd, &key) == -1 && errno == EINVAL); + + close(fd); +} + +static void test_arraymap_percpu(int task, void *data) +{ + unsigned int nr_cpus = sysconf(_SC_NPROCESSORS_CONF); + int key, next_key, fd, i; + long values[nr_cpus]; + + fd = bpf_map_create(BPF_MAP_TYPE_PERCPU_ARRAY, sizeof(key), + sizeof(values[0]), 2, 0); + if (fd < 0) { + printf("Failed to create arraymap '%s'!\n", strerror(errno)); + exit(1); + } + + for (i = 0; i < nr_cpus; i++) + values[i] = i + 100; + + key = 1; + /* Insert key=1 element. */ + assert(bpf_map_update(fd, &key, values, BPF_ANY) == 0); + + values[0] = 0; + assert(bpf_map_update(fd, &key, values, BPF_NOEXIST) == -1 && + errno == EEXIST); + + /* Check that key=1 can be found. */ + assert(bpf_map_lookup(fd, &key, values) == 0 && values[0] == 100); + + key = 0; + /* Check that key=0 is also found and zero initialized. */ + assert(bpf_map_lookup(fd, &key, values) == 0 && + values[0] == 0 && values[nr_cpus - 1] == 0); + + /* Check that key=2 cannot be inserted due to max_entries limit. */ + key = 2; + assert(bpf_map_update(fd, &key, values, BPF_EXIST) == -1 && + errno == E2BIG); + + /* Check that key = 2 doesn't exist. */ + assert(bpf_map_lookup(fd, &key, values) == -1 && errno == ENOENT); + + /* Iterate over two elements. */ + assert(bpf_map_next_key(fd, &key, &next_key) == 0 && + next_key == 0); + assert(bpf_map_next_key(fd, &next_key, &next_key) == 0 && + next_key == 1); + assert(bpf_map_next_key(fd, &next_key, &next_key) == -1 && + errno == ENOENT); + + /* Delete shouldn't succeed. */ + key = 1; + assert(bpf_map_delete(fd, &key) == -1 && errno == EINVAL); + + close(fd); +} + +static void test_arraymap_percpu_many_keys(void) +{ + unsigned int nr_cpus = sysconf(_SC_NPROCESSORS_CONF); + unsigned int nr_keys = 20000; + long values[nr_cpus]; + int key, fd, i; + + fd = bpf_map_create(BPF_MAP_TYPE_PERCPU_ARRAY, sizeof(key), + sizeof(values[0]), nr_keys, 0); + if (fd < 0) { + printf("Failed to create per-cpu arraymap '%s'!\n", + strerror(errno)); + exit(1); + } + + for (i = 0; i < nr_cpus; i++) + values[i] = i + 10; + + for (key = 0; key < nr_keys; key++) + assert(bpf_map_update(fd, &key, values, BPF_ANY) == 0); + + for (key = 0; key < nr_keys; key++) { + for (i = 0; i < nr_cpus; i++) + values[i] = 0; + + assert(bpf_map_lookup(fd, &key, values) == 0); + + for (i = 0; i < nr_cpus; i++) + assert(values[i] == i + 10); + } + + close(fd); +} + +#define MAP_SIZE (32 * 1024) + +static void test_map_large(void) +{ + struct bigkey { + int a; + char b[116]; + long long c; + } key; + int fd, i, value; + + fd = bpf_map_create(BPF_MAP_TYPE_HASH, sizeof(key), sizeof(value), + MAP_SIZE, map_flags); + if (fd < 0) { + printf("Failed to create large map '%s'!\n", strerror(errno)); + exit(1); + } + + for (i = 0; i < MAP_SIZE; i++) { + key = (struct bigkey) { .c = i }; + value = i; + + assert(bpf_map_update(fd, &key, &value, BPF_NOEXIST) == 0); + } + + key.c = -1; + assert(bpf_map_update(fd, &key, &value, BPF_NOEXIST) == -1 && + errno == E2BIG); + + /* Iterate through all elements. */ + for (i = 0; i < MAP_SIZE; i++) + assert(bpf_map_next_key(fd, &key, &key) == 0); + assert(bpf_map_next_key(fd, &key, &key) == -1 && errno == ENOENT); + + key.c = 0; + assert(bpf_map_lookup(fd, &key, &value) == 0 && value == 0); + key.a = 1; + assert(bpf_map_lookup(fd, &key, &value) == -1 && errno == ENOENT); + + close(fd); +} + +static void run_parallel(int tasks, void (*fn)(int task, void *data), + void *data) +{ + pid_t pid[tasks]; + int i; + + for (i = 0; i < tasks; i++) { + pid[i] = fork(); + if (pid[i] == 0) { + fn(i, data); + exit(0); + } else if (pid[i] == -1) { + printf("Couldn't spawn #%d process!\n", i); + exit(1); + } + } + + for (i = 0; i < tasks; i++) { + int status; + + assert(waitpid(pid[i], &status, 0) == pid[i]); + assert(status == 0); + } +} + +static void test_map_stress(void) +{ + run_parallel(100, test_hashmap, NULL); + run_parallel(100, test_hashmap_percpu, NULL); + + run_parallel(100, test_arraymap, NULL); + run_parallel(100, test_arraymap_percpu, NULL); +} + +#define TASKS 1024 + +#define DO_UPDATE 1 +#define DO_DELETE 0 + +static void do_work(int fn, void *data) +{ + int do_update = ((int *)data)[1]; + int fd = ((int *)data)[0]; + int i, key, value; + + for (i = fn; i < MAP_SIZE; i += TASKS) { + key = value = i; + + if (do_update) { + assert(bpf_map_update(fd, &key, &value, BPF_NOEXIST) == 0); + assert(bpf_map_update(fd, &key, &value, BPF_EXIST) == 0); + } else { + assert(bpf_map_delete(fd, &key) == 0); + } + } +} + +static void test_map_parallel(void) +{ + int i, fd, key = 0, value = 0; + int data[2]; + + fd = bpf_map_create(BPF_MAP_TYPE_HASH, sizeof(key), sizeof(value), + MAP_SIZE, map_flags); + if (fd < 0) { + printf("Failed to create map for parallel test '%s'!\n", + strerror(errno)); + exit(1); + } + + /* Use the same fd in children to add elements to this map: + * child_0 adds key=0, key=1024, key=2048, ... + * child_1 adds key=1, key=1025, key=2049, ... + * child_1023 adds key=1023, ... + */ + data[0] = fd; + data[1] = DO_UPDATE; + run_parallel(TASKS, do_work, data); + + /* Check that key=0 is already there. */ + assert(bpf_map_update(fd, &key, &value, BPF_NOEXIST) == -1 && + errno == EEXIST); + + /* Check that all elements were inserted. */ + key = -1; + for (i = 0; i < MAP_SIZE; i++) + assert(bpf_map_next_key(fd, &key, &key) == 0); + assert(bpf_map_next_key(fd, &key, &key) == -1 && errno == ENOENT); + + /* Another check for all elements */ + for (i = 0; i < MAP_SIZE; i++) { + key = MAP_SIZE - i - 1; + + assert(bpf_map_lookup(fd, &key, &value) == 0 && + value == key); + } + + /* Now let's delete all elemenets in parallel. */ + data[1] = DO_DELETE; + run_parallel(TASKS, do_work, data); + + /* Nothing should be left. */ + key = -1; + assert(bpf_map_next_key(fd, &key, &key) == -1 && errno == ENOENT); +} + +static void run_all_tests(void) +{ + test_hashmap(0, NULL); + test_hashmap_percpu(0, NULL); + + test_arraymap(0, NULL); + test_arraymap_percpu(0, NULL); + + test_arraymap_percpu_many_keys(); + + test_map_large(); + test_map_parallel(); + test_map_stress(); +} + +int main(void) +{ + struct rlimit rinf = { RLIM_INFINITY, RLIM_INFINITY }; + + setrlimit(RLIMIT_MEMLOCK, &rinf); + + map_flags = 0; + run_all_tests(); + + map_flags = BPF_F_NO_PREALLOC; + run_all_tests(); + + printf("test_maps: OK\n"); + return 0; +} diff --git a/tools/testing/selftests/bpf/test_verifier.c b/tools/testing/selftests/bpf/test_verifier.c new file mode 100644 index 000000000000..0ef8eaf6cea7 --- /dev/null +++ b/tools/testing/selftests/bpf/test_verifier.c @@ -0,0 +1,2836 @@ +/* + * Testsuite for eBPF verifier + * + * Copyright (c) 2014 PLUMgrid, http://plumgrid.com + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of version 2 of the GNU General Public + * License as published by the Free Software Foundation. + */ + +#include <stdio.h> +#include <unistd.h> +#include <errno.h> +#include <string.h> +#include <stddef.h> +#include <stdbool.h> +#include <sched.h> + +#include <sys/resource.h> + +#include <linux/unistd.h> +#include <linux/filter.h> +#include <linux/bpf_perf_event.h> +#include <linux/bpf.h> + +#include "../../../include/linux/filter.h" + +#include "bpf_sys.h" + +#ifndef ARRAY_SIZE +# define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0])) +#endif + +#define MAX_INSNS 512 +#define MAX_FIXUPS 8 + +struct bpf_test { + const char *descr; + struct bpf_insn insns[MAX_INSNS]; + int fixup_map1[MAX_FIXUPS]; + int fixup_map2[MAX_FIXUPS]; + int fixup_prog[MAX_FIXUPS]; + const char *errstr; + const char *errstr_unpriv; + enum { + UNDEF, + ACCEPT, + REJECT + } result, result_unpriv; + enum bpf_prog_type prog_type; +}; + +/* Note we want this to be 64 bit aligned so that the end of our array is + * actually the end of the structure. + */ +#define MAX_ENTRIES 11 + +struct test_val { + unsigned int index; + int foo[MAX_ENTRIES]; +}; + +static struct bpf_test tests[] = { + { + "add+sub+mul", + .insns = { + BPF_MOV64_IMM(BPF_REG_1, 1), + BPF_ALU64_IMM(BPF_ADD, BPF_REG_1, 2), + BPF_MOV64_IMM(BPF_REG_2, 3), + BPF_ALU64_REG(BPF_SUB, BPF_REG_1, BPF_REG_2), + BPF_ALU64_IMM(BPF_ADD, BPF_REG_1, -1), + BPF_ALU64_IMM(BPF_MUL, BPF_REG_1, 3), + BPF_MOV64_REG(BPF_REG_0, BPF_REG_1), + BPF_EXIT_INSN(), + }, + .result = ACCEPT, + }, + { + "unreachable", + .insns = { + BPF_EXIT_INSN(), + BPF_EXIT_INSN(), + }, + .errstr = "unreachable", + .result = REJECT, + }, + { + "unreachable2", + .insns = { + BPF_JMP_IMM(BPF_JA, 0, 0, 1), + BPF_JMP_IMM(BPF_JA, 0, 0, 0), + BPF_EXIT_INSN(), + }, + .errstr = "unreachable", + .result = REJECT, + }, + { + "out of range jump", + .insns = { + BPF_JMP_IMM(BPF_JA, 0, 0, 1), + BPF_EXIT_INSN(), + }, + .errstr = "jump out of range", + .result = REJECT, + }, + { + "out of range jump2", + .insns = { + BPF_JMP_IMM(BPF_JA, 0, 0, -2), + BPF_EXIT_INSN(), + }, + .errstr = "jump out of range", + .result = REJECT, + }, + { + "test1 ld_imm64", + .insns = { + BPF_JMP_IMM(BPF_JEQ, BPF_REG_1, 0, 1), + BPF_LD_IMM64(BPF_REG_0, 0), + BPF_LD_IMM64(BPF_REG_0, 0), + BPF_LD_IMM64(BPF_REG_0, 1), + BPF_LD_IMM64(BPF_REG_0, 1), + BPF_MOV64_IMM(BPF_REG_0, 2), + BPF_EXIT_INSN(), + }, + .errstr = "invalid BPF_LD_IMM insn", + .errstr_unpriv = "R1 pointer comparison", + .result = REJECT, + }, + { + "test2 ld_imm64", + .insns = { + BPF_JMP_IMM(BPF_JEQ, BPF_REG_1, 0, 1), + BPF_LD_IMM64(BPF_REG_0, 0), + BPF_LD_IMM64(BPF_REG_0, 0), + BPF_LD_IMM64(BPF_REG_0, 1), + BPF_LD_IMM64(BPF_REG_0, 1), + BPF_EXIT_INSN(), + }, + .errstr = "invalid BPF_LD_IMM insn", + .errstr_unpriv = "R1 pointer comparison", + .result = REJECT, + }, + { + "test3 ld_imm64", + .insns = { + BPF_JMP_IMM(BPF_JEQ, BPF_REG_1, 0, 1), + BPF_RAW_INSN(BPF_LD | BPF_IMM | BPF_DW, 0, 0, 0, 0), + BPF_LD_IMM64(BPF_REG_0, 0), + BPF_LD_IMM64(BPF_REG_0, 0), + BPF_LD_IMM64(BPF_REG_0, 1), + BPF_LD_IMM64(BPF_REG_0, 1), + BPF_EXIT_INSN(), + }, + .errstr = "invalid bpf_ld_imm64 insn", + .result = REJECT, + }, + { + "test4 ld_imm64", + .insns = { + BPF_RAW_INSN(BPF_LD | BPF_IMM | BPF_DW, 0, 0, 0, 0), + BPF_EXIT_INSN(), + }, + .errstr = "invalid bpf_ld_imm64 insn", + .result = REJECT, + }, + { + "test5 ld_imm64", + .insns = { + BPF_RAW_INSN(BPF_LD | BPF_IMM | BPF_DW, 0, 0, 0, 0), + }, + .errstr = "invalid bpf_ld_imm64 insn", + .result = REJECT, + }, + { + "no bpf_exit", + .insns = { + BPF_ALU64_REG(BPF_MOV, BPF_REG_0, BPF_REG_2), + }, + .errstr = "jump out of range", + .result = REJECT, + }, + { + "loop (back-edge)", + .insns = { + BPF_JMP_IMM(BPF_JA, 0, 0, -1), + BPF_EXIT_INSN(), + }, + .errstr = "back-edge", + .result = REJECT, + }, + { + "loop2 (back-edge)", + .insns = { + BPF_MOV64_REG(BPF_REG_1, BPF_REG_0), + BPF_MOV64_REG(BPF_REG_2, BPF_REG_0), + BPF_MOV64_REG(BPF_REG_3, BPF_REG_0), + BPF_JMP_IMM(BPF_JA, 0, 0, -4), + BPF_EXIT_INSN(), + }, + .errstr = "back-edge", + .result = REJECT, + }, + { + "conditional loop", + .insns = { + BPF_MOV64_REG(BPF_REG_1, BPF_REG_0), + BPF_MOV64_REG(BPF_REG_2, BPF_REG_0), + BPF_MOV64_REG(BPF_REG_3, BPF_REG_0), + BPF_JMP_IMM(BPF_JEQ, BPF_REG_1, 0, -3), + BPF_EXIT_INSN(), + }, + .errstr = "back-edge", + .result = REJECT, + }, + { + "read uninitialized register", + .insns = { + BPF_MOV64_REG(BPF_REG_0, BPF_REG_2), + BPF_EXIT_INSN(), + }, + .errstr = "R2 !read_ok", + .result = REJECT, + }, + { + "read invalid register", + .insns = { + BPF_MOV64_REG(BPF_REG_0, -1), + BPF_EXIT_INSN(), + }, + .errstr = "R15 is invalid", + .result = REJECT, + }, + { + "program doesn't init R0 before exit", + .insns = { + BPF_ALU64_REG(BPF_MOV, BPF_REG_2, BPF_REG_1), + BPF_EXIT_INSN(), + }, + .errstr = "R0 !read_ok", + .result = REJECT, + }, + { + "program doesn't init R0 before exit in all branches", + .insns = { + BPF_JMP_IMM(BPF_JGE, BPF_REG_1, 0, 2), + BPF_MOV64_IMM(BPF_REG_0, 1), + BPF_ALU64_IMM(BPF_ADD, BPF_REG_0, 2), + BPF_EXIT_INSN(), + }, + .errstr = "R0 !read_ok", + .errstr_unpriv = "R1 pointer comparison", + .result = REJECT, + }, + { + "stack out of bounds", + .insns = { + BPF_ST_MEM(BPF_DW, BPF_REG_10, 8, 0), + BPF_EXIT_INSN(), + }, + .errstr = "invalid stack", + .result = REJECT, + }, + { + "invalid call insn1", + .insns = { + BPF_RAW_INSN(BPF_JMP | BPF_CALL | BPF_X, 0, 0, 0, 0), + BPF_EXIT_INSN(), + }, + .errstr = "BPF_CALL uses reserved", + .result = REJECT, + }, + { + "invalid call insn2", + .insns = { + BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 1, 0), + BPF_EXIT_INSN(), + }, + .errstr = "BPF_CALL uses reserved", + .result = REJECT, + }, + { + "invalid function call", + .insns = { + BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0, 1234567), + BPF_EXIT_INSN(), + }, + .errstr = "invalid func 1234567", + .result = REJECT, + }, + { + "uninitialized stack1", + .insns = { + BPF_MOV64_REG(BPF_REG_2, BPF_REG_10), + BPF_ALU64_IMM(BPF_ADD, BPF_REG_2, -8), + BPF_LD_MAP_FD(BPF_REG_1, 0), + BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0, + BPF_FUNC_map_lookup_elem), + BPF_EXIT_INSN(), + }, + .fixup_map1 = { 2 }, + .errstr = "invalid indirect read from stack", + .result = REJECT, + }, + { + "uninitialized stack2", + .insns = { + BPF_MOV64_REG(BPF_REG_2, BPF_REG_10), + BPF_LDX_MEM(BPF_DW, BPF_REG_0, BPF_REG_2, -8), + BPF_EXIT_INSN(), + }, + .errstr = "invalid read from stack", + .result = REJECT, + }, + { + "invalid argument register", + .insns = { + BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0, + BPF_FUNC_get_cgroup_classid), + BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0, + BPF_FUNC_get_cgroup_classid), + BPF_EXIT_INSN(), + }, + .errstr = "R1 !read_ok", + .result = REJECT, + .prog_type = BPF_PROG_TYPE_SCHED_CLS, + }, + { + "non-invalid argument register", + .insns = { + BPF_ALU64_REG(BPF_MOV, BPF_REG_6, BPF_REG_1), + BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0, + BPF_FUNC_get_cgroup_classid), + BPF_ALU64_REG(BPF_MOV, BPF_REG_1, BPF_REG_6), + BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0, + BPF_FUNC_get_cgroup_classid), + BPF_EXIT_INSN(), + }, + .result = ACCEPT, + .prog_type = BPF_PROG_TYPE_SCHED_CLS, + }, + { + "check valid spill/fill", + .insns = { + /* spill R1(ctx) into stack */ + BPF_STX_MEM(BPF_DW, BPF_REG_10, BPF_REG_1, -8), + /* fill it back into R2 */ + BPF_LDX_MEM(BPF_DW, BPF_REG_2, BPF_REG_10, -8), + /* should be able to access R0 = *(R2 + 8) */ + /* BPF_LDX_MEM(BPF_DW, BPF_REG_0, BPF_REG_2, 8), */ + BPF_MOV64_REG(BPF_REG_0, BPF_REG_2), |