647 lines
17 KiB
C
647 lines
17 KiB
C
|
/*
|
||
|
|
* 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.
|
||
|
|
*/
|
||
|
|
#define _GNU_SOURCE
|
||
|
|
#include <stdio.h>
|
||
|
|
#include <unistd.h>
|
||
|
|
#include <errno.h>
|
||
|
|
#include <string.h>
|
||
|
|
#include <assert.h>
|
||
|
|
#include <sched.h>
|
||
|
|
#include <stdlib.h>
|
||
|
|
#include <time.h>
|
||
|
|
|
||
|
|
#include <sys/wait.h>
|
||
|
|
|
||
|
|
#include <bpf/bpf.h>
|
||
|
|
|
||
|
|
#include "bpf_util.h"
|
||
|
|
#include "bpf_rlimit.h"
|
||
|
|
|
||
|
|
#define LOCAL_FREE_TARGET (128)
|
||
|
|
#define PERCPU_FREE_TARGET (4)
|
||
|
|
|
||
|
|
static int nr_cpus;
|
||
|
|
|
||
|
|
static int create_map(int map_type, int map_flags, unsigned int size)
|
||
|
|
{
|
||
|
|
int map_fd;
|
||
|
|
|
||
|
|
map_fd = bpf_create_map(map_type, sizeof(unsigned long long),
|
||
|
|
sizeof(unsigned long long), size, map_flags);
|
||
|
|
|
||
|
|
if (map_fd == -1)
|
||
|
|
perror("bpf_create_map");
|
||
|
|
|
||
|
|
return map_fd;
|
||
|
|
}
|
||
|
|
|
||
|
|
static int map_subset(int map0, int map1)
|
||
|
|
{
|
||
|
|
unsigned long long next_key = 0;
|
||
|
|
unsigned long long value0[nr_cpus], value1[nr_cpus];
|
||
|
|
int ret;
|
||
|
|
|
||
|
|
while (!bpf_map_get_next_key(map1, &next_key, &next_key)) {
|
||
|
|
assert(!bpf_map_lookup_elem(map1, &next_key, value1));
|
||
|
|
ret = bpf_map_lookup_elem(map0, &next_key, value0);
|
||
|
|
if (ret) {
|
||
|
|
printf("key:%llu not found from map. %s(%d)\n",
|
||
|
|
next_key, strerror(errno), errno);
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
if (value0[0] != value1[0]) {
|
||
|
|
printf("key:%llu value0:%llu != value1:%llu\n",
|
||
|
|
next_key, value0[0], value1[0]);
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
return 1;
|
||
|
|
}
|
||
|
|
|
||
|
|
static int map_equal(int lru_map, int expected)
|
||
|
|
{
|
||
|
|
return map_subset(lru_map, expected) && map_subset(expected, lru_map);
|
||
|
|
}
|
||
|
|
|
||
|
|
static int sched_next_online(int pid, int *next_to_try)
|
||
|
|
{
|
||
|
|
cpu_set_t cpuset;
|
||
|
|
int next = *next_to_try;
|
||
|
|
int ret = -1;
|
||
|
|
|
||
|
|
while (next < nr_cpus) {
|
||
|
|
CPU_ZERO(&cpuset);
|
||
|
|
CPU_SET(next++, &cpuset);
|
||
|
|
if (!sched_setaffinity(pid, sizeof(cpuset), &cpuset)) {
|
||
|
|
ret = 0;
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
*next_to_try = next;
|
||
|
|
return ret;
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Size of the LRU amp is 2
|
||
|
|
* Add key=1 (+1 key)
|
||
|
|
* Add key=2 (+1 key)
|
||
|
|
* Lookup Key=1
|
||
|
|
* Add Key=3
|
||
|
|
* => Key=2 will be removed by LRU
|
||
|
|
* Iterate map. Only found key=1 and key=3
|
||
|
|
*/
|
||
|
|
static void test_lru_sanity0(int map_type, int map_flags)
|
||
|
|
{
|
||
|
|
unsigned long long key, value[nr_cpus];
|
||
|
|
int lru_map_fd, expected_map_fd;
|
||
|
|
int next_cpu = 0;
|
||
|
|
|
||
|
|
printf("%s (map_type:%d map_flags:0x%X): ", __func__, map_type,
|
||
|
|
map_flags);
|
||
|
|
|
||
|
|
assert(sched_next_online(0, &next_cpu) != -1);
|
||
|
|
|
||
|
|
if (map_flags & BPF_F_NO_COMMON_LRU)
|
||
|
|
lru_map_fd = create_map(map_type, map_flags, 2 * nr_cpus);
|
||
|
|
else
|
||
|
|
lru_map_fd = create_map(map_type, map_flags, 2);
|
||
|
|
assert(lru_map_fd != -1);
|
||
|
|
|
||
|
|
expected_map_fd = create_map(BPF_MAP_TYPE_HASH, 0, 2);
|
||
|
|
assert(expected_map_fd != -1);
|
||
|
|
|
||
|
|
value[0] = 1234;
|
||
|
|
|
||
|
|
/* insert key=1 element */
|
||
|
|
|
||
|
|
key = 1;
|
||
|
|
assert(!bpf_map_update_elem(lru_map_fd, &key, value, BPF_NOEXIST));
|
||
|
|
assert(!bpf_map_update_elem(expected_map_fd, &key, value,
|
||
|
|
BPF_NOEXIST));
|
||
|
|
|
||
|
|
/* BPF_NOEXIST means: add new element if it doesn't exist */
|
||
|
|
assert(bpf_map_update_elem(lru_map_fd, &key, value, BPF_NOEXIST) == -1
|
||
|
|
/* key=1 already exists */
|
||
|
|
&& errno == EEXIST);
|
||
|
|
|
||
|
|
assert(bpf_map_update_elem(lru_map_fd, &key, value, -1) == -1 &&
|
||
|
|
errno == EINVAL);
|
||
|
|
|
||
|
|
/* insert key=2 element */
|
||
|
|
|
||
|
|
/* check that key=2 is not found */
|
||
|
|
key = 2;
|
||
|
|
assert(bpf_map_lookup_elem(lru_map_fd, &key, value) == -1 &&
|
||
|
|
errno == ENOENT);
|
||
|
|
|
||
|
|
/* BPF_EXIST means: update existing element */
|
||
|
|
assert(bpf_map_update_elem(lru_map_fd, &key, value, BPF_EXIST) == -1 &&
|
||
|
|
/* key=2 is not there */
|
||
|
|
errno == ENOENT);
|
||
|
|
|
||
|
|
assert(!bpf_map_update_elem(lru_map_fd, &key, value, BPF_NOEXIST));
|
||
|
|
|
||
|
|
/* insert key=3 element */
|
||
|
|
|
||
|
|
/* check that key=3 is not found */
|
||
|
|
key = 3;
|
||
|
|
assert(bpf_map_lookup_elem(lru_map_fd, &key, value) == -1 &&
|
||
|
|
errno == ENOENT);
|
||
|
|
|
||
|
|
/* check that key=1 can be found and mark the ref bit to
|
||
|
|
* stop LRU from removing key=1
|
||
|
|
*/
|
||
|
|
key = 1;
|
||
|
|
assert(!bpf_map_lookup_elem(lru_map_fd, &key, value));
|
||
|
|
assert(value[0] == 1234);
|
||
|
|
|
||
|
|
key = 3;
|
||
|
|
assert(!bpf_map_update_elem(lru_map_fd, &key, value, BPF_NOEXIST));
|
||
|
|
assert(!bpf_map_update_elem(expected_map_fd, &key, value,
|
||
|
|
BPF_NOEXIST));
|
||
|
|
|
||
|
|
/* key=2 has been removed from the LRU */
|
||
|
|
key = 2;
|
||
|
|
assert(bpf_map_lookup_elem(lru_map_fd, &key, value) == -1);
|
||
|
|
|
||
|
|
assert(map_equal(lru_map_fd, expected_map_fd));
|
||
|
|
|
||
|
|
close(expected_map_fd);
|
||
|
|
close(lru_map_fd);
|
||
|
|
|
||
|
|
printf("Pass\n");
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Size of the LRU map is 1.5*tgt_free
|
||
|
|
* Insert 1 to tgt_free (+tgt_free keys)
|
||
|
|
* Lookup 1 to tgt_free/2
|
||
|
|
* Insert 1+tgt_free to 2*tgt_free (+tgt_free keys)
|
||
|
|
* => 1+tgt_free/2 to LOCALFREE_TARGET will be removed by LRU
|
||
|
|
*/
|
||
|
|
static void test_lru_sanity1(int map_type, int map_flags, unsigned int tgt_free)
|
||
|
|
{
|
||
|
|
unsigned long long key, end_key, value[nr_cpus];
|
||
|
|
int lru_map_fd, expected_map_fd;
|
||
|
|
unsigned int batch_size;
|
||
|
|
unsigned int map_size;
|
||
|
|
int next_cpu = 0;
|
||
|
|
|
||
|
|
if (map_flags & BPF_F_NO_COMMON_LRU)
|
||
|
|
/* This test is only applicable to common LRU list */
|
||
|
|
return;
|
||
|
|
|
||
|
|
printf("%s (map_type:%d map_flags:0x%X): ", __func__, map_type,
|
||
|
|
map_flags);
|
||
|
|
|
||
|
|
assert(sched_next_online(0, &next_cpu) != -1);
|
||
|
|
|
||
|
|
batch_size = tgt_free / 2;
|
||
|
|
assert(batch_size * 2 == tgt_free);
|
||
|
|
|
||
|
|
map_size = tgt_free + batch_size;
|
||
|
|
lru_map_fd = create_map(map_type, map_flags, map_size);
|
||
|
|
assert(lru_map_fd != -1);
|
||
|
|
|
||
|
|
expected_map_fd = create_map(BPF_MAP_TYPE_HASH, 0, map_size);
|
||
|
|
assert(expected_map_fd != -1);
|
||
|
|
|
||
|
|
value[0] = 1234;
|
||
|
|
|
||
|
|
/* Insert 1 to tgt_free (+tgt_free keys) */
|
||
|
|
end_key = 1 + tgt_free;
|
||
|
|
for (key = 1; key < end_key; key++)
|
||
|
|
assert(!bpf_map_update_elem(lru_map_fd, &key, value,
|
||
|
|
BPF_NOEXIST));
|
||
|
|
|
||
|
|
/* Lookup 1 to tgt_free/2 */
|
||
|
|
end_key = 1 + batch_size;
|
||
|
|
for (key = 1; key < end_key; key++) {
|
||
|
|
assert(!bpf_map_lookup_elem(lru_map_fd, &key, value));
|
||
|
|
assert(!bpf_map_update_elem(expected_map_fd, &key, value,
|
||
|
|
BPF_NOEXIST));
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Insert 1+tgt_free to 2*tgt_free
|
||
|
|
* => 1+tgt_free/2 to LOCALFREE_TARGET will be
|
||
|
|
* removed by LRU
|
||
|
|
*/
|
||
|
|
key = 1 + tgt_free;
|
||
|
|
end_key = key + tgt_free;
|
||
|
|
for (; key < end_key; key++) {
|
||
|
|
assert(!bpf_map_update_elem(lru_map_fd, &key, value,
|
||
|
|
BPF_NOEXIST));
|
||
|
|
assert(!bpf_map_update_elem(expected_map_fd, &key, value,
|
||
|
|
BPF_NOEXIST));
|
||
|
|
}
|
||
|
|
|
||
|
|
assert(map_equal(lru_map_fd, expected_map_fd));
|
||
|
|
|
||
|
|
close(expected_map_fd);
|
||
|
|
close(lru_map_fd);
|
||
|
|
|
||
|
|
printf("Pass\n");
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Size of the LRU map 1.5 * tgt_free
|
||
|
|
* Insert 1 to tgt_free (+tgt_free keys)
|
||
|
|
* Update 1 to tgt_free/2
|
||
|
|
* => The original 1 to tgt_free/2 will be removed due to
|
||
|
|
* the LRU shrink process
|
||
|
|
* Re-insert 1 to tgt_free/2 again and do a lookup immeidately
|
||
|
|
* Insert 1+tgt_free to tgt_free*3/2
|
||
|
|
* Insert 1+tgt_free*3/2 to tgt_free*5/2
|
||
|
|
* => Key 1+tgt_free to tgt_free*3/2
|
||
|
|
* will be removed from LRU because it has never
|
||
|
|
* been lookup and ref bit is not set
|
||
|
|
*/
|
||
|
|
static void test_lru_sanity2(int map_type, int map_flags, unsigned int tgt_free)
|
||
|
|
{
|
||
|
|
unsigned long long key, value[nr_cpus];
|
||
|
|
unsigned long long end_key;
|
||
|
|
int lru_map_fd, expected_map_fd;
|
||
|
|
unsigned int batch_size;
|
||
|
|
unsigned int map_size;
|
||
|
|
int next_cpu = 0;
|
||
|
|
|
||
|
|
if (map_flags & BPF_F_NO_COMMON_LRU)
|
||
|
|
/* This test is only applicable to common LRU list */
|
||
|
|
return;
|
||
|
|
|
||
|
|
printf("%s (map_type:%d map_flags:0x%X): ", __func__, map_type,
|
||
|
|
map_flags);
|
||
|
|
|
||
|
|
assert(sched_next_online(0, &next_cpu) != -1);
|
||
|
|
|
||
|
|
batch_size = tgt_free / 2;
|
||
|
|
assert(batch_size * 2 == tgt_free);
|
||
|
|
|
||
|
|
map_size = tgt_free + batch_size;
|
||
|
|
lru_map_fd = create_map(map_type, map_flags, map_size);
|
||
|
|
assert(lru_map_fd != -1);
|
||
|
|
|
||
|
|
expected_map_fd = create_map(BPF_MAP_TYPE_HASH, 0, map_size);
|
||
|
|
assert(expected_map_fd != -1);
|
||
|
|
|
||
|
|
value[0] = 1234;
|
||
|
|
|
||
|
|
/* Insert 1 to tgt_free (+tgt_free keys) */
|
||
|
|
end_key = 1 + tgt_free;
|
||
|
|
for (key = 1; key < end_key; key++)
|
||
|
|
assert(!bpf_map_update_elem(lru_map_fd, &key, value,
|
||
|
|
BPF_NOEXIST));
|
||
|
|
|
||
|
|
/* Any bpf_map_update_elem will require to acquire a new node
|
||
|
|
* from LRU first.
|
||
|
|
*
|
||
|
|
* The local list is running out of free nodes.
|
||
|
|
* It gets from the global LRU list which tries to
|
||
|
|
* shrink the inactive list to get tgt_free
|
||
|
|
* number of free nodes.
|
||
|
|
*
|
||
|
|
* Hence, the oldest key 1 to tgt_free/2
|
||
|
|
* are removed from the LRU list.
|
||
|
|
*/
|
||
|
|
key = 1;
|
||
|
|
if (map_type == BPF_MAP_TYPE_LRU_PERCPU_HASH) {
|
||
|
|
assert(!bpf_map_update_elem(lru_map_fd, &key, value,
|
||
|
|
BPF_NOEXIST));
|
||
|
|
assert(!bpf_map_delete_elem(lru_map_fd, &key));
|
||
|
|
} else {
|
||
|
|
assert(bpf_map_update_elem(lru_map_fd, &key, value,
|
||
|
|
BPF_EXIST));
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Re-insert 1 to tgt_free/2 again and do a lookup
|
||
|
|
* immeidately.
|
||
|
|
*/
|
||
|
|
end_key = 1 + batch_size;
|
||
|
|
value[0] = 4321;
|
||
|
|
for (key = 1; key < end_key; key++) {
|
||
|
|
assert(bpf_map_lookup_elem(lru_map_fd, &key, value));
|
||
|
|
assert(!bpf_map_update_elem(lru_map_fd, &key, value,
|
||
|
|
BPF_NOEXIST));
|
||
|
|
assert(!bpf_map_lookup_elem(lru_map_fd, &key, value));
|
||
|
|
assert(value[0] == 4321);
|
||
|
|
assert(!bpf_map_update_elem(expected_map_fd, &key, value,
|
||
|
|
BPF_NOEXIST));
|
||
|
|
}
|
||
|
|
|
||
|
|
value[0] = 1234;
|
||
|
|
|
||
|
|
/* Insert 1+tgt_free to tgt_free*3/2 */
|
||
|
|
end_key = 1 + tgt_free + batch_size;
|
||
|
|
for (key = 1 + tgt_free; key < end_key; key++)
|
||
|
|
/* These newly added but not referenced keys will be
|
||
|
|
* gone during the next LRU shrink.
|
||
|
|
*/
|
||
|
|
assert(!bpf_map_update_elem(lru_map_fd, &key, value,
|
||
|
|
BPF_NOEXIST));
|
||
|
|
|
||
|
|
/* Insert 1+tgt_free*3/2 to tgt_free*5/2 */
|
||
|
|
end_key = key + tgt_free;
|
||
|
|
for (; key < end_key; key++) {
|
||
|
|
assert(!bpf_map_update_elem(lru_map_fd, &key, value,
|
||
|
|
BPF_NOEXIST));
|
||
|
|
assert(!bpf_map_update_elem(expected_map_fd, &key, value,
|
||
|
|
BPF_NOEXIST));
|
||
|
|
}
|
||
|
|
|
||
|
|
assert(map_equal(lru_map_fd, expected_map_fd));
|
||
|
|
|
||
|
|
close(expected_map_fd);
|
||
|
|
close(lru_map_fd);
|
||
|
|
|
||
|
|
printf("Pass\n");
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Size of the LRU map is 2*tgt_free
|
||
|
|
* It is to test the active/inactive list rotation
|
||
|
|
* Insert 1 to 2*tgt_free (+2*tgt_free keys)
|
||
|
|
* Lookup key 1 to tgt_free*3/2
|
||
|
|
* Add 1+2*tgt_free to tgt_free*5/2 (+tgt_free/2 keys)
|
||
|
|
* => key 1+tgt_free*3/2 to 2*tgt_free are removed from LRU
|
||
|
|
*/
|
||
|
|
static void test_lru_sanity3(int map_type, int map_flags, unsigned int tgt_free)
|
||
|
|
{
|
||
|
|
unsigned long long key, end_key, value[nr_cpus];
|
||
|
|
int lru_map_fd, expected_map_fd;
|
||
|
|
unsigned int batch_size;
|
||
|
|
unsigned int map_size;
|
||
|
|
int next_cpu = 0;
|
||
|
|
|
||
|
|
if (map_flags & BPF_F_NO_COMMON_LRU)
|
||
|
|
/* This test is only applicable to common LRU list */
|
||
|
|
return;
|
||
|
|
|
||
|
|
printf("%s (map_type:%d map_flags:0x%X): ", __func__, map_type,
|
||
|
|
map_flags);
|
||
|
|
|
||
|
|
assert(sched_next_online(0, &next_cpu) != -1);
|
||
|
|
|
||
|
|
batch_size = tgt_free / 2;
|
||
|
|
assert(batch_size * 2 == tgt_free);
|
||
|
|
|
||
|
|
map_size = tgt_free * 2;
|
||
|
|
lru_map_fd = create_map(map_type, map_flags, map_size);
|
||
|
|
assert(lru_map_fd != -1);
|
||
|
|
|
||
|
|
expected_map_fd = create_map(BPF_MAP_TYPE_HASH, 0, map_size);
|
||
|
|
assert(expected_map_fd != -1);
|
||
|
|
|
||
|
|
value[0] = 1234;
|
||
|
|
|
||
|
|
/* Insert 1 to 2*tgt_free (+2*tgt_free keys) */
|
||
|
|
end_key = 1 + (2 * tgt_free);
|
||
|
|
for (key = 1; key < end_key; key++)
|
||
|
|
assert(!bpf_map_update_elem(lru_map_fd, &key, value,
|
||
|
|
BPF_NOEXIST));
|
||
|
|
|
||
|
|
/* Lookup key 1 to tgt_free*3/2 */
|
||
|
|
end_key = tgt_free + batch_size;
|
||
|
|
for (key = 1; key < end_key; key++) {
|
||
|
|
assert(!bpf_map_lookup_elem(lru_map_fd, &key, value));
|
||
|
|
assert(!bpf_map_update_elem(expected_map_fd, &key, value,
|
||
|
|
BPF_NOEXIST));
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Add 1+2*tgt_free to tgt_free*5/2
|
||
|
|
* (+tgt_free/2 keys)
|
||
|
|
*/
|
||
|
|
key = 2 * tgt_free + 1;
|
||
|
|
end_key = key + batch_size;
|
||
|
|
for (; key < end_key; key++) {
|
||
|
|
assert(!bpf_map_update_elem(lru_map_fd, &key, value,
|
||
|
|
BPF_NOEXIST));
|
||
|
|
assert(!bpf_map_update_elem(expected_map_fd, &key, value,
|
||
|
|
BPF_NOEXIST));
|
||
|
|
}
|
||
|
|
|
||
|
|
assert(map_equal(lru_map_fd, expected_map_fd));
|
||
|
|
|
||
|
|
close(expected_map_fd);
|
||
|
|
close(lru_map_fd);
|
||
|
|
|
||
|
|
printf("Pass\n");
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Test deletion */
|
||
|
|
static void test_lru_sanity4(int map_type, int map_flags, unsigned int tgt_free)
|
||
|
|
{
|
||
|
|
int lru_map_fd, expected_map_fd;
|
||
|
|
unsigned long long key, value[nr_cpus];
|
||
|
|
unsigned long long end_key;
|
||
|
|
int next_cpu = 0;
|
||
|
|
|
||
|
|
printf("%s (map_type:%d map_flags:0x%X): ", __func__, map_type,
|
||
|
|
map_flags);
|
||
|
|
|
||
|
|
assert(sched_next_online(0, &next_cpu) != -1);
|
||
|
|
|
||
|
|
if (map_flags & BPF_F_NO_COMMON_LRU)
|
||
|
|
lru_map_fd = create_map(map_type, map_flags,
|
||
|
|
3 * tgt_free * nr_cpus);
|
||
|
|
else
|
||
|
|
lru_map_fd = create_map(map_type, map_flags, 3 * tgt_free);
|
||
|
|
assert(lru_map_fd != -1);
|
||
|
|
|
||
|
|
expected_map_fd = create_map(BPF_MAP_TYPE_HASH, 0,
|
||
|
|
3 * tgt_free);
|
||
|
|
assert(expected_map_fd != -1);
|
||
|
|
|
||
|
|
value[0] = 1234;
|
||
|
|
|
||
|
|
for (key = 1; key <= 2 * tgt_free; key++)
|
||
|
|
assert(!bpf_map_update_elem(lru_map_fd, &key, value,
|
||
|
|
BPF_NOEXIST));
|
||
|
|
|
||
|
|
key = 1;
|
||
|
|
assert(bpf_map_update_elem(lru_map_fd, &key, value, BPF_NOEXIST));
|
||
|
|
|
||
|
|
for (key = 1; key <= tgt_free; key++) {
|
||
|
|
assert(!bpf_map_lookup_elem(lru_map_fd, &key, value));
|
||
|
|
assert(!bpf_map_update_elem(expected_map_fd, &key, value,
|
||
|
|
BPF_NOEXIST));
|
||
|
|
}
|
||
|
|
|
||
|
|
for (; key <= 2 * tgt_free; key++) {
|
||
|
|
assert(!bpf_map_delete_elem(lru_map_fd, &key));
|
||
|
|
assert(bpf_map_delete_elem(lru_map_fd, &key));
|
||
|
|
}
|
||
|
|
|
||
|
|
end_key = key + 2 * tgt_free;
|
||
|
|
for (; key < end_key; key++) {
|
||
|
|
assert(!bpf_map_update_elem(lru_map_fd, &key, value,
|
||
|
|
BPF_NOEXIST));
|
||
|
|
assert(!bpf_map_update_elem(expected_map_fd, &key, value,
|
||
|
|
BPF_NOEXIST));
|
||
|
|
}
|
||
|
|
|
||
|
|
assert(map_equal(lru_map_fd, expected_map_fd));
|
||
|
|
|
||
|
|
close(expected_map_fd);
|
||
|
|
close(lru_map_fd);
|
||
|
|
|
||
|
|
printf("Pass\n");
|
||
|
|
}
|
||
|
|
|
||
|
|
static void do_test_lru_sanity5(unsigned long long last_key, int map_fd)
|
||
|
|
{
|
||
|
|
unsigned long long key, value[nr_cpus];
|
||
|
|
|
||
|
|
/* Ensure the last key inserted by previous CPU can be found */
|
||
|
|
assert(!bpf_map_lookup_elem(map_fd, &last_key, value));
|
||
|
|
|
||
|
|
value[0] = 1234;
|
||
|
|
|
||
|
|
key = last_key + 1;
|
||
|
|
assert(!bpf_map_update_elem(map_fd, &key, value, BPF_NOEXIST));
|
||
|
|
assert(!bpf_map_lookup_elem(map_fd, &key, value));
|
||
|
|
|
||
|
|
/* Cannot find the last key because it was removed by LRU */
|
||
|
|
assert(bpf_map_lookup_elem(map_fd, &last_key, value));
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Test map with only one element */
|
||
|
|
static void test_lru_sanity5(int map_type, int map_flags)
|
||
|
|
{
|
||
|
|
unsigned long long key, value[nr_cpus];
|
||
|
|
int next_cpu = 0;
|
||
|
|
int map_fd;
|
||
|
|
|
||
|
|
if (map_flags & BPF_F_NO_COMMON_LRU)
|
||
|
|
return;
|
||
|
|
|
||
|
|
printf("%s (map_type:%d map_flags:0x%X): ", __func__, map_type,
|
||
|
|
map_flags);
|
||
|
|
|
||
|
|
map_fd = create_map(map_type, map_flags, 1);
|
||
|
|
assert(map_fd != -1);
|
||
|
|
|
||
|
|
value[0] = 1234;
|
||
|
|
key = 0;
|
||
|
|
assert(!bpf_map_update_elem(map_fd, &key, value, BPF_NOEXIST));
|
||
|
|
|
||
|
|
while (sched_next_online(0, &next_cpu) != -1) {
|
||
|
|
pid_t pid;
|
||
|
|
|
||
|
|
pid = fork();
|
||
|
|
if (pid == 0) {
|
||
|
|
do_test_lru_sanity5(key, map_fd);
|
||
|
|
exit(0);
|
||
|
|
} else if (pid == -1) {
|
||
|
|
printf("couldn't spawn process to test key:%llu\n",
|
||
|
|
key);
|
||
|
|
exit(1);
|
||
|
|
} else {
|
||
|
|
int status;
|
||
|
|
|
||
|
|
assert(waitpid(pid, &status, 0) == pid);
|
||
|
|
assert(status == 0);
|
||
|
|
key++;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
close(map_fd);
|
||
|
|
/* At least one key should be tested */
|
||
|
|
assert(key > 0);
|
||
|
|
|
||
|
|
printf("Pass\n");
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Test list rotation for BPF_F_NO_COMMON_LRU map */
|
||
|
|
static void test_lru_sanity6(int map_type, int map_flags, int tgt_free)
|
||
|
|
{
|
||
|
|
int lru_map_fd, expected_map_fd;
|
||
|
|
unsigned long long key, value[nr_cpus];
|
||
|
|
unsigned int map_size = tgt_free * 2;
|
||
|
|
int next_cpu = 0;
|
||
|
|
|
||
|
|
if (!(map_flags & BPF_F_NO_COMMON_LRU))
|
||
|
|
return;
|
||
|
|
|
||
|
|
printf("%s (map_type:%d map_flags:0x%X): ", __func__, map_type,
|
||
|
|
map_flags);
|
||
|
|
|
||
|
|
assert(sched_next_online(0, &next_cpu) != -1);
|
||
|
|
|
||
|
|
expected_map_fd = create_map(BPF_MAP_TYPE_HASH, 0, map_size);
|
||
|
|
assert(expected_map_fd != -1);
|
||
|
|
|
||
|
|
lru_map_fd = create_map(map_type, map_flags, map_size * nr_cpus);
|
||
|
|
assert(lru_map_fd != -1);
|
||
|
|
|
||
|
|
value[0] = 1234;
|
||
|
|
|
||
|
|
for (key = 1; key <= tgt_free; key++) {
|
||
|
|
assert(!bpf_map_update_elem(lru_map_fd, &key, value,
|
||
|
|
BPF_NOEXIST));
|
||
|
|
assert(!bpf_map_update_elem(expected_map_fd, &key, value,
|
||
|
|
BPF_NOEXIST));
|
||
|
|
}
|
||
|
|
|
||
|
|
for (; key <= tgt_free * 2; key++) {
|
||
|
|
unsigned long long stable_key;
|
||
|
|
|
||
|
|
/* Make ref bit sticky for key: [1, tgt_free] */
|
||
|
|
for (stable_key = 1; stable_key <= tgt_free; stable_key++) {
|
||
|
|
/* Mark the ref bit */
|
||
|
|
assert(!bpf_map_lookup_elem(lru_map_fd, &stable_key,
|
||
|
|
value));
|
||
|
|
}
|
||
|
|
assert(!bpf_map_update_elem(lru_map_fd, &key, value,
|
||
|
|
BPF_NOEXIST));
|
||
|
|
}
|
||
|
|
|
||
|
|
for (; key <= tgt_free * 3; key++) {
|
||
|
|
assert(!bpf_map_update_elem(lru_map_fd, &key, value,
|
||
|
|
BPF_NOEXIST));
|
||
|
|
assert(!bpf_map_update_elem(expected_map_fd, &key, value,
|
||
|
|
BPF_NOEXIST));
|
||
|
|
}
|
||
|
|
|
||
|
|
assert(map_equal(lru_map_fd, expected_map_fd));
|
||
|
|
|
||
|
|
close(expected_map_fd);
|
||
|
|
close(lru_map_fd);
|
||
|
|
|
||
|
|
printf("Pass\n");
|
||
|
|
}
|
||
|
|
|
||
|
|
int main(int argc, char **argv)
|
||
|
|
{
|
||
|
|
int map_types[] = {BPF_MAP_TYPE_LRU_HASH,
|
||
|
|
BPF_MAP_TYPE_LRU_PERCPU_HASH};
|
||
|
|
int map_flags[] = {0, BPF_F_NO_COMMON_LRU};
|
||
|
|
int t, f;
|
||
|
|
|
||
|
|
setbuf(stdout, NULL);
|
||
|
|
|
||
|
|
nr_cpus = bpf_num_possible_cpus();
|
||
|
|
assert(nr_cpus != -1);
|
||
|
|
printf("nr_cpus:%d\n\n", nr_cpus);
|
||
|
|
|
||
|
|
for (f = 0; f < sizeof(map_flags) / sizeof(*map_flags); f++) {
|
||
|
|
unsigned int tgt_free = (map_flags[f] & BPF_F_NO_COMMON_LRU) ?
|
||
|
|
PERCPU_FREE_TARGET : LOCAL_FREE_TARGET;
|
||
|
|
|
||
|
|
for (t = 0; t < sizeof(map_types) / sizeof(*map_types); t++) {
|
||
|
|
test_lru_sanity0(map_types[t], map_flags[f]);
|
||
|
|
test_lru_sanity1(map_types[t], map_flags[f], tgt_free);
|
||
|
|
test_lru_sanity2(map_types[t], map_flags[f], tgt_free);
|
||
|
|
test_lru_sanity3(map_types[t], map_flags[f], tgt_free);
|
||
|
|
test_lru_sanity4(map_types[t], map_flags[f], tgt_free);
|
||
|
|
test_lru_sanity5(map_types[t], map_flags[f]);
|
||
|
|
test_lru_sanity6(map_types[t], map_flags[f], tgt_free);
|
||
|
|
|
||
|
|
printf("\n");
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|