bpf: Use bpf_map_lookup_elem() from the library
Replace bpf_map_lookup() with bpf_map_lookup_elem() calls. Signed-off-by: Mickaël Salaün <mic@digikod.net> Cc: Alexei Starovoitov <ast@fb.com> Cc: Daniel Borkmann <daniel@iogearbox.net> Cc: Shuah Khan <shuah@kernel.org> Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Mickaël Salaün
David S. Miller
Родитель
10ecc728fe
Коммит
e5ff7c4019
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@ -112,7 +112,7 @@ int bpf_map_update_elem(int fd, const void *key, const void *value,
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return sys_bpf(BPF_MAP_UPDATE_ELEM, &attr, sizeof(attr));
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}
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int bpf_map_lookup_elem(int fd, void *key, void *value)
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int bpf_map_lookup_elem(int fd, const void *key, void *value)
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{
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union bpf_attr attr;
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@ -36,7 +36,7 @@ int bpf_load_program(enum bpf_prog_type type, const struct bpf_insn *insns,
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int bpf_map_update_elem(int fd, const void *key, const void *value,
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__u64 flags);
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int bpf_map_lookup_elem(int fd, void *key, void *value);
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int bpf_map_lookup_elem(int fd, const void *key, void *value);
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int bpf_map_delete_elem(int fd, void *key);
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int bpf_map_get_next_key(int fd, void *key, void *next_key);
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int bpf_obj_pin(int fd, const char *pathname);
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@ -24,17 +24,6 @@ static inline int bpf(int cmd, union bpf_attr *attr, unsigned int size)
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#endif
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}
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static inline int bpf_map_lookup(int fd, const void *key, void *value)
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{
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union bpf_attr attr = {};
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attr.map_fd = fd;
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attr.key = bpf_ptr_to_u64(key);
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attr.value = bpf_ptr_to_u64(value);
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return bpf(BPF_MAP_LOOKUP_ELEM, &attr, sizeof(attr));
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}
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static inline int bpf_map_delete(int fd, const void *key)
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{
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union bpf_attr attr = {};
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@ -211,7 +211,7 @@ static void test_lpm_map(int keysize)
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key->prefixlen = 8 * keysize;
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memcpy(key->data, data, keysize);
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r = bpf_map_lookup(map, key, value);
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r = bpf_map_lookup_elem(map, key, value);
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assert(!r || errno == ENOENT);
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assert(!t == !!r);
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@ -300,32 +300,32 @@ static void test_lpm_ipaddr(void)
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/* Test some lookups that should come back with a value */
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inet_pton(AF_INET, "192.168.128.23", key_ipv4->data);
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assert(bpf_map_lookup(map_fd_ipv4, key_ipv4, &value) == 0);
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assert(bpf_map_lookup_elem(map_fd_ipv4, key_ipv4, &value) == 0);
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assert(value == 3);
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inet_pton(AF_INET, "192.168.0.1", key_ipv4->data);
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assert(bpf_map_lookup(map_fd_ipv4, key_ipv4, &value) == 0);
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assert(bpf_map_lookup_elem(map_fd_ipv4, key_ipv4, &value) == 0);
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assert(value == 2);
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inet_pton(AF_INET6, "2a00:1450:4001:814::", key_ipv6->data);
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assert(bpf_map_lookup(map_fd_ipv6, key_ipv6, &value) == 0);
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assert(bpf_map_lookup_elem(map_fd_ipv6, key_ipv6, &value) == 0);
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assert(value == 0xdeadbeef);
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inet_pton(AF_INET6, "2a00:1450:4001:814::1", key_ipv6->data);
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assert(bpf_map_lookup(map_fd_ipv6, key_ipv6, &value) == 0);
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assert(bpf_map_lookup_elem(map_fd_ipv6, key_ipv6, &value) == 0);
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assert(value == 0xdeadbeef);
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/* Test some lookups that should not match any entry */
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inet_pton(AF_INET, "10.0.0.1", key_ipv4->data);
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assert(bpf_map_lookup(map_fd_ipv4, key_ipv4, &value) == -1 &&
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assert(bpf_map_lookup_elem(map_fd_ipv4, key_ipv4, &value) == -1 &&
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errno == ENOENT);
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inet_pton(AF_INET, "11.11.11.11", key_ipv4->data);
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assert(bpf_map_lookup(map_fd_ipv4, key_ipv4, &value) == -1 &&
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assert(bpf_map_lookup_elem(map_fd_ipv4, key_ipv4, &value) == -1 &&
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errno == ENOENT);
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inet_pton(AF_INET6, "2a00:ffff::", key_ipv6->data);
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assert(bpf_map_lookup(map_fd_ipv6, key_ipv6, &value) == -1 &&
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assert(bpf_map_lookup_elem(map_fd_ipv6, key_ipv6, &value) == -1 &&
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errno == ENOENT);
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close(map_fd_ipv4);
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@ -47,8 +47,8 @@ static int map_subset(int map0, int map1)
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int ret;
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while (!bpf_map_next_key(map1, &next_key, &next_key)) {
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assert(!bpf_map_lookup(map1, &next_key, value1));
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ret = bpf_map_lookup(map0, &next_key, value0);
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assert(!bpf_map_lookup_elem(map1, &next_key, value1));
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ret = bpf_map_lookup_elem(map0, &next_key, value0);
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if (ret) {
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printf("key:%llu not found from map. %s(%d)\n",
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next_key, strerror(errno), errno);
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@ -136,7 +136,7 @@ static void test_lru_sanity0(int map_type, int map_flags)
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/* check that key=2 is not found */
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key = 2;
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assert(bpf_map_lookup(lru_map_fd, &key, value) == -1 &&
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assert(bpf_map_lookup_elem(lru_map_fd, &key, value) == -1 &&
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errno == ENOENT);
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/* BPF_EXIST means: update existing element */
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@ -150,14 +150,14 @@ static void test_lru_sanity0(int map_type, int map_flags)
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/* check that key=3 is not found */
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key = 3;
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assert(bpf_map_lookup(lru_map_fd, &key, value) == -1 &&
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assert(bpf_map_lookup_elem(lru_map_fd, &key, value) == -1 &&
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errno == ENOENT);
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/* check that key=1 can be found and mark the ref bit to
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* stop LRU from removing key=1
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*/
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key = 1;
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assert(!bpf_map_lookup(lru_map_fd, &key, value));
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assert(!bpf_map_lookup_elem(lru_map_fd, &key, value));
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assert(value[0] == 1234);
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key = 3;
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@ -167,7 +167,7 @@ static void test_lru_sanity0(int map_type, int map_flags)
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/* key=2 has been removed from the LRU */
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key = 2;
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assert(bpf_map_lookup(lru_map_fd, &key, value) == -1);
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assert(bpf_map_lookup_elem(lru_map_fd, &key, value) == -1);
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assert(map_equal(lru_map_fd, expected_map_fd));
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@ -226,7 +226,7 @@ static void test_lru_sanity1(int map_type, int map_flags, unsigned int tgt_free)
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/* Lookup 1 to tgt_free/2 */
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end_key = 1 + batch_size;
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for (key = 1; key < end_key; key++) {
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assert(!bpf_map_lookup(lru_map_fd, &key, value));
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assert(!bpf_map_lookup_elem(lru_map_fd, &key, value));
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assert(!bpf_map_update_elem(expected_map_fd, &key, value,
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BPF_NOEXIST));
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}
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@ -336,10 +336,10 @@ static void test_lru_sanity2(int map_type, int map_flags, unsigned int tgt_free)
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end_key = 1 + batch_size;
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value[0] = 4321;
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for (key = 1; key < end_key; key++) {
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assert(bpf_map_lookup(lru_map_fd, &key, value));
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assert(bpf_map_lookup_elem(lru_map_fd, &key, value));
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assert(!bpf_map_update_elem(lru_map_fd, &key, value,
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BPF_NOEXIST));
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assert(!bpf_map_lookup(lru_map_fd, &key, value));
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assert(!bpf_map_lookup_elem(lru_map_fd, &key, value));
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assert(value[0] == 4321);
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assert(!bpf_map_update_elem(expected_map_fd, &key, value,
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BPF_NOEXIST));
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@ -418,7 +418,7 @@ static void test_lru_sanity3(int map_type, int map_flags, unsigned int tgt_free)
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/* Lookup key 1 to tgt_free*3/2 */
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end_key = tgt_free + batch_size;
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for (key = 1; key < end_key; key++) {
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assert(!bpf_map_lookup(lru_map_fd, &key, value));
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assert(!bpf_map_lookup_elem(lru_map_fd, &key, value));
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assert(!bpf_map_update_elem(expected_map_fd, &key, value,
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BPF_NOEXIST));
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}
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@ -477,7 +477,7 @@ static void test_lru_sanity4(int map_type, int map_flags, unsigned int tgt_free)
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assert(bpf_map_update_elem(lru_map_fd, &key, value, BPF_NOEXIST));
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for (key = 1; key <= tgt_free; key++) {
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assert(!bpf_map_lookup(lru_map_fd, &key, value));
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assert(!bpf_map_lookup_elem(lru_map_fd, &key, value));
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assert(!bpf_map_update_elem(expected_map_fd, &key, value,
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BPF_NOEXIST));
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}
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@ -508,16 +508,16 @@ static void do_test_lru_sanity5(unsigned long long last_key, int map_fd)
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unsigned long long key, value[nr_cpus];
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/* Ensure the last key inserted by previous CPU can be found */
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assert(!bpf_map_lookup(map_fd, &last_key, value));
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assert(!bpf_map_lookup_elem(map_fd, &last_key, value));
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value[0] = 1234;
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key = last_key + 1;
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assert(!bpf_map_update_elem(map_fd, &key, value, BPF_NOEXIST));
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assert(!bpf_map_lookup(map_fd, &key, value));
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assert(!bpf_map_lookup_elem(map_fd, &key, value));
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/* Cannot find the last key because it was removed by LRU */
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assert(bpf_map_lookup(map_fd, &last_key, value));
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assert(bpf_map_lookup_elem(map_fd, &last_key, value));
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}
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/* Test map with only one element */
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@ -55,11 +55,11 @@ static void test_hashmap(int task, void *data)
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errno == EINVAL);
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/* Check that key=1 can be found. */
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assert(bpf_map_lookup(fd, &key, &value) == 0 && value == 1234);
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assert(bpf_map_lookup_elem(fd, &key, &value) == 0 && value == 1234);
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key = 2;
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/* Check that key=2 is not found. */
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assert(bpf_map_lookup(fd, &key, &value) == -1 && errno == ENOENT);
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assert(bpf_map_lookup_elem(fd, &key, &value) == -1 && errno == ENOENT);
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/* BPF_EXIST means update existing element. */
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assert(bpf_map_update_elem(fd, &key, &value, BPF_EXIST) == -1 &&
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@ -148,11 +148,11 @@ static void test_hashmap_percpu(int task, void *data)
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* was run from a different CPU.
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*/
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value[0] = 1;
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assert(bpf_map_lookup(fd, &key, value) == 0 && value[0] == 100);
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assert(bpf_map_lookup_elem(fd, &key, value) == 0 && value[0] == 100);
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key = 2;
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/* Check that key=2 is not found. */
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assert(bpf_map_lookup(fd, &key, value) == -1 && errno == ENOENT);
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assert(bpf_map_lookup_elem(fd, &key, value) == -1 && errno == ENOENT);
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/* BPF_EXIST means update existing element. */
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assert(bpf_map_update_elem(fd, &key, value, BPF_EXIST) == -1 &&
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@ -179,7 +179,7 @@ static void test_hashmap_percpu(int task, void *data)
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assert((expected_key_mask & next_key) == next_key);
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expected_key_mask &= ~next_key;
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assert(bpf_map_lookup(fd, &next_key, value) == 0);
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assert(bpf_map_lookup_elem(fd, &next_key, value) == 0);
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for (i = 0; i < nr_cpus; i++)
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assert(value[i] == i + 100);
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@ -229,11 +229,11 @@ static void test_arraymap(int task, void *data)
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errno == EEXIST);
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/* Check that key=1 can be found. */
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assert(bpf_map_lookup(fd, &key, &value) == 0 && value == 1234);
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assert(bpf_map_lookup_elem(fd, &key, &value) == 0 && value == 1234);
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key = 0;
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/* Check that key=0 is also found and zero initialized. */
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assert(bpf_map_lookup(fd, &key, &value) == 0 && value == 0);
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assert(bpf_map_lookup_elem(fd, &key, &value) == 0 && value == 0);
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/* key=0 and key=1 were inserted, check that key=2 cannot be inserted
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* due to max_entries limit.
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@ -243,7 +243,7 @@ static void test_arraymap(int task, void *data)
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errno == E2BIG);
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/* Check that key = 2 doesn't exist. */
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assert(bpf_map_lookup(fd, &key, &value) == -1 && errno == ENOENT);
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assert(bpf_map_lookup_elem(fd, &key, &value) == -1 && errno == ENOENT);
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/* Iterate over two elements. */
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assert(bpf_map_next_key(fd, &key, &next_key) == 0 &&
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@ -285,11 +285,11 @@ static void test_arraymap_percpu(int task, void *data)
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errno == EEXIST);
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/* Check that key=1 can be found. */
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assert(bpf_map_lookup(fd, &key, values) == 0 && values[0] == 100);
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assert(bpf_map_lookup_elem(fd, &key, values) == 0 && values[0] == 100);
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key = 0;
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/* Check that key=0 is also found and zero initialized. */
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assert(bpf_map_lookup(fd, &key, values) == 0 &&
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assert(bpf_map_lookup_elem(fd, &key, values) == 0 &&
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values[0] == 0 && values[nr_cpus - 1] == 0);
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/* Check that key=2 cannot be inserted due to max_entries limit. */
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@ -298,7 +298,7 @@ static void test_arraymap_percpu(int task, void *data)
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errno == E2BIG);
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/* Check that key = 2 doesn't exist. */
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assert(bpf_map_lookup(fd, &key, values) == -1 && errno == ENOENT);
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assert(bpf_map_lookup_elem(fd, &key, values) == -1 && errno == ENOENT);
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/* Iterate over two elements. */
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assert(bpf_map_next_key(fd, &key, &next_key) == 0 &&
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@ -340,7 +340,7 @@ static void test_arraymap_percpu_many_keys(void)
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for (i = 0; i < nr_cpus; i++)
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values[i] = 0;
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assert(bpf_map_lookup(fd, &key, values) == 0);
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assert(bpf_map_lookup_elem(fd, &key, values) == 0);
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for (i = 0; i < nr_cpus; i++)
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assert(values[i] == i + 10);
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@ -384,9 +384,9 @@ static void test_map_large(void)
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assert(bpf_map_next_key(fd, &key, &key) == -1 && errno == ENOENT);
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key.c = 0;
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assert(bpf_map_lookup(fd, &key, &value) == 0 && value == 0);
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assert(bpf_map_lookup_elem(fd, &key, &value) == 0 && value == 0);
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key.a = 1;
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assert(bpf_map_lookup(fd, &key, &value) == -1 && errno == ENOENT);
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assert(bpf_map_lookup_elem(fd, &key, &value) == -1 && errno == ENOENT);
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close(fd);
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}
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@ -486,7 +486,7 @@ static void test_map_parallel(void)
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for (i = 0; i < MAP_SIZE; i++) {
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key = MAP_SIZE - i - 1;
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assert(bpf_map_lookup(fd, &key, &value) == 0 &&
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assert(bpf_map_lookup_elem(fd, &key, &value) == 0 &&
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value == key);
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}
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