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Message-Id: <20170206224941.14739-3-mic@digikod.net>
Date: Mon, 6 Feb 2017 23:49:36 +0100
From: Mickaël Salaün <mic@...ikod.net>
To: linux-kernel@...r.kernel.org
Cc: Mickaël Salaün <mic@...ikod.net>,
Arnaldo Carvalho de Melo <acme@...hat.com>,
"David S . Miller" <davem@...emloft.net>, netdev@...r.kernel.org,
Alexei Starovoitov <ast@...com>,
Daniel Borkmann <daniel@...earbox.net>,
Shuah Khan <shuah@...nel.org>
Subject: [PATCH net-next v2 3/8] 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@...ikod.net>
Cc: Alexei Starovoitov <ast@...com>
Cc: Daniel Borkmann <daniel@...earbox.net>
Cc: Shuah Khan <shuah@...nel.org>
---
tools/lib/bpf/bpf.c | 5 ++---
tools/lib/bpf/bpf.h | 2 +-
tools/testing/selftests/bpf/bpf_sys.h | 11 -----------
tools/testing/selftests/bpf/test_lpm_map.c | 16 ++++++++--------
tools/testing/selftests/bpf/test_lru_map.c | 28 ++++++++++++++--------------
tools/testing/selftests/bpf/test_maps.c | 30 +++++++++++++++---------------
6 files changed, 40 insertions(+), 52 deletions(-)
diff --git a/tools/lib/bpf/bpf.c b/tools/lib/bpf/bpf.c
index ea3369b50321..81505801fa33 100644
--- a/tools/lib/bpf/bpf.c
+++ b/tools/lib/bpf/bpf.c
@@ -110,11 +110,10 @@ int bpf_map_update_elem(int fd, const void *key, const void *value,
return sys_bpf(BPF_MAP_UPDATE_ELEM, &attr, sizeof(attr));
}
-int bpf_map_lookup_elem(int fd, void *key, void *value)
+int bpf_map_lookup_elem(int fd, const void *key, void *value)
{
- union bpf_attr attr;
+ union bpf_attr attr = {};
- bzero(&attr, sizeof(attr));
attr.map_fd = fd;
attr.key = ptr_to_u64(key);
attr.value = ptr_to_u64(value);
diff --git a/tools/lib/bpf/bpf.h b/tools/lib/bpf/bpf.h
index 2458534c8b33..171cf594f782 100644
--- a/tools/lib/bpf/bpf.h
+++ b/tools/lib/bpf/bpf.h
@@ -36,7 +36,7 @@ int bpf_load_program(enum bpf_prog_type type, const struct bpf_insn *insns,
int bpf_map_update_elem(int fd, const void *key, const void *value,
__u64 flags);
-int bpf_map_lookup_elem(int fd, void *key, void *value);
+int bpf_map_lookup_elem(int fd, const void *key, void *value);
int bpf_map_delete_elem(int fd, void *key);
int bpf_map_get_next_key(int fd, void *key, void *next_key);
int bpf_obj_pin(int fd, const char *pathname);
diff --git a/tools/testing/selftests/bpf/bpf_sys.h b/tools/testing/selftests/bpf/bpf_sys.h
index e08dec0db9e0..0a5a6060db70 100644
--- a/tools/testing/selftests/bpf/bpf_sys.h
+++ b/tools/testing/selftests/bpf/bpf_sys.h
@@ -24,17 +24,6 @@ static inline int bpf(int cmd, union bpf_attr *attr, unsigned int size)
#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_delete(int fd, const void *key)
{
union bpf_attr attr = {};
diff --git a/tools/testing/selftests/bpf/test_lpm_map.c b/tools/testing/selftests/bpf/test_lpm_map.c
index e29ffbcd2932..bd08394c26cb 100644
--- a/tools/testing/selftests/bpf/test_lpm_map.c
+++ b/tools/testing/selftests/bpf/test_lpm_map.c
@@ -211,7 +211,7 @@ static void test_lpm_map(int keysize)
key->prefixlen = 8 * keysize;
memcpy(key->data, data, keysize);
- r = bpf_map_lookup(map, key, value);
+ r = bpf_map_lookup_elem(map, key, value);
assert(!r || errno == ENOENT);
assert(!t == !!r);
@@ -300,32 +300,32 @@ static void test_lpm_ipaddr(void)
/* Test some lookups that should come back with a value */
inet_pton(AF_INET, "192.168.128.23", key_ipv4->data);
- assert(bpf_map_lookup(map_fd_ipv4, key_ipv4, &value) == 0);
+ assert(bpf_map_lookup_elem(map_fd_ipv4, key_ipv4, &value) == 0);
assert(value == 3);
inet_pton(AF_INET, "192.168.0.1", key_ipv4->data);
- assert(bpf_map_lookup(map_fd_ipv4, key_ipv4, &value) == 0);
+ assert(bpf_map_lookup_elem(map_fd_ipv4, key_ipv4, &value) == 0);
assert(value == 2);
inet_pton(AF_INET6, "2a00:1450:4001:814::", key_ipv6->data);
- assert(bpf_map_lookup(map_fd_ipv6, key_ipv6, &value) == 0);
+ assert(bpf_map_lookup_elem(map_fd_ipv6, key_ipv6, &value) == 0);
assert(value == 0xdeadbeef);
inet_pton(AF_INET6, "2a00:1450:4001:814::1", key_ipv6->data);
- assert(bpf_map_lookup(map_fd_ipv6, key_ipv6, &value) == 0);
+ assert(bpf_map_lookup_elem(map_fd_ipv6, key_ipv6, &value) == 0);
assert(value == 0xdeadbeef);
/* Test some lookups that should not match any entry */
inet_pton(AF_INET, "10.0.0.1", key_ipv4->data);
- assert(bpf_map_lookup(map_fd_ipv4, key_ipv4, &value) == -1 &&
+ assert(bpf_map_lookup_elem(map_fd_ipv4, key_ipv4, &value) == -1 &&
errno == ENOENT);
inet_pton(AF_INET, "11.11.11.11", key_ipv4->data);
- assert(bpf_map_lookup(map_fd_ipv4, key_ipv4, &value) == -1 &&
+ assert(bpf_map_lookup_elem(map_fd_ipv4, key_ipv4, &value) == -1 &&
errno == ENOENT);
inet_pton(AF_INET6, "2a00:ffff::", key_ipv6->data);
- assert(bpf_map_lookup(map_fd_ipv6, key_ipv6, &value) == -1 &&
+ assert(bpf_map_lookup_elem(map_fd_ipv6, key_ipv6, &value) == -1 &&
errno == ENOENT);
close(map_fd_ipv4);
diff --git a/tools/testing/selftests/bpf/test_lru_map.c b/tools/testing/selftests/bpf/test_lru_map.c
index 8011680248bd..53155009bdb6 100644
--- a/tools/testing/selftests/bpf/test_lru_map.c
+++ b/tools/testing/selftests/bpf/test_lru_map.c
@@ -47,8 +47,8 @@ static int map_subset(int map0, int map1)
int ret;
while (!bpf_map_next_key(map1, &next_key, &next_key)) {
- assert(!bpf_map_lookup(map1, &next_key, value1));
- ret = bpf_map_lookup(map0, &next_key, value0);
+ 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);
@@ -135,7 +135,7 @@ static void test_lru_sanity0(int map_type, int map_flags)
/* check that key=2 is not found */
key = 2;
- assert(bpf_map_lookup(lru_map_fd, &key, value) == -1 &&
+ assert(bpf_map_lookup_elem(lru_map_fd, &key, value) == -1 &&
errno == ENOENT);
/* BPF_EXIST means: update existing element */
@@ -149,14 +149,14 @@ static void test_lru_sanity0(int map_type, int map_flags)
/* check that key=3 is not found */
key = 3;
- assert(bpf_map_lookup(lru_map_fd, &key, value) == -1 &&
+ 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(lru_map_fd, &key, value));
+ assert(!bpf_map_lookup_elem(lru_map_fd, &key, value));
assert(value[0] == 1234);
key = 3;
@@ -165,7 +165,7 @@ static void test_lru_sanity0(int map_type, int map_flags)
/* key=2 has been removed from the LRU */
key = 2;
- assert(bpf_map_lookup(lru_map_fd, &key, value) == -1);
+ assert(bpf_map_lookup_elem(lru_map_fd, &key, value) == -1);
assert(map_equal(lru_map_fd, expected_map_fd));
@@ -223,7 +223,7 @@ static void test_lru_sanity1(int map_type, int map_flags, unsigned int tgt_free)
/* Lookup 1 to tgt_free/2 */
end_key = 1 + batch_size;
for (key = 1; key < end_key; key++) {
- assert(!bpf_map_lookup(lru_map_fd, &key, value));
+ assert(!bpf_map_lookup_elem(lru_map_fd, &key, value));
assert(!bpf_map_update_elem(expected_map_fd, &key, value,
BPF_NOEXIST));
}
@@ -329,9 +329,9 @@ static void test_lru_sanity2(int map_type, int map_flags, unsigned int tgt_free)
end_key = 1 + batch_size;
value[0] = 4321;
for (key = 1; key < end_key; key++) {
- assert(bpf_map_lookup(lru_map_fd, &key, value));
+ 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(lru_map_fd, &key, value));
+ 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));
@@ -407,7 +407,7 @@ static void test_lru_sanity3(int map_type, int map_flags, unsigned int tgt_free)
/* 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(lru_map_fd, &key, value));
+ assert(!bpf_map_lookup_elem(lru_map_fd, &key, value));
assert(!bpf_map_update_elem(expected_map_fd, &key, value,
BPF_NOEXIST));
}
@@ -464,7 +464,7 @@ static void test_lru_sanity4(int map_type, int map_flags, unsigned int tgt_free)
assert(bpf_map_update_elem(lru_map_fd, &key, value, BPF_NOEXIST));
for (key = 1; key <= tgt_free; key++) {
- assert(!bpf_map_lookup(lru_map_fd, &key, value));
+ assert(!bpf_map_lookup_elem(lru_map_fd, &key, value));
assert(!bpf_map_update_elem(expected_map_fd, &key, value,
BPF_NOEXIST));
}
@@ -494,16 +494,16 @@ 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(map_fd, &last_key, value));
+ 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(map_fd, &key, value));
+ assert(!bpf_map_lookup_elem(map_fd, &key, value));
/* Cannot find the last key because it was removed by LRU */
- assert(bpf_map_lookup(map_fd, &last_key, value));
+ assert(bpf_map_lookup_elem(map_fd, &last_key, value));
}
/* Test map with only one element */
diff --git a/tools/testing/selftests/bpf/test_maps.c b/tools/testing/selftests/bpf/test_maps.c
index 2574cc7517b9..c73a1fbc5bcc 100644
--- a/tools/testing/selftests/bpf/test_maps.c
+++ b/tools/testing/selftests/bpf/test_maps.c
@@ -54,11 +54,11 @@ static void test_hashmap(int task, void *data)
assert(bpf_map_update_elem(fd, &key, &value, -1) == -1 && errno == EINVAL);
/* Check that key=1 can be found. */
- assert(bpf_map_lookup(fd, &key, &value) == 0 && value == 1234);
+ assert(bpf_map_lookup_elem(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);
+ assert(bpf_map_lookup_elem(fd, &key, &value) == -1 && errno == ENOENT);
/* BPF_EXIST means update existing element. */
assert(bpf_map_update_elem(fd, &key, &value, BPF_EXIST) == -1 &&
@@ -146,11 +146,11 @@ static void test_hashmap_percpu(int task, void *data)
* was run from a different CPU.
*/
value[0] = 1;
- assert(bpf_map_lookup(fd, &key, value) == 0 && value[0] == 100);
+ assert(bpf_map_lookup_elem(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);
+ assert(bpf_map_lookup_elem(fd, &key, value) == -1 && errno == ENOENT);
/* BPF_EXIST means update existing element. */
assert(bpf_map_update_elem(fd, &key, value, BPF_EXIST) == -1 &&
@@ -177,7 +177,7 @@ static void test_hashmap_percpu(int task, void *data)
assert((expected_key_mask & next_key) == next_key);
expected_key_mask &= ~next_key;
- assert(bpf_map_lookup(fd, &next_key, value) == 0);
+ assert(bpf_map_lookup_elem(fd, &next_key, value) == 0);
for (i = 0; i < nr_cpus; i++)
assert(value[i] == i + 100);
@@ -227,11 +227,11 @@ static void test_arraymap(int task, void *data)
errno == EEXIST);
/* Check that key=1 can be found. */
- assert(bpf_map_lookup(fd, &key, &value) == 0 && value == 1234);
+ assert(bpf_map_lookup_elem(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);
+ assert(bpf_map_lookup_elem(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.
@@ -241,7 +241,7 @@ static void test_arraymap(int task, void *data)
errno == E2BIG);
/* Check that key = 2 doesn't exist. */
- assert(bpf_map_lookup(fd, &key, &value) == -1 && errno == ENOENT);
+ assert(bpf_map_lookup_elem(fd, &key, &value) == -1 && errno == ENOENT);
/* Iterate over two elements. */
assert(bpf_map_next_key(fd, &key, &next_key) == 0 &&
@@ -283,11 +283,11 @@ static void test_arraymap_percpu(int task, void *data)
errno == EEXIST);
/* Check that key=1 can be found. */
- assert(bpf_map_lookup(fd, &key, values) == 0 && values[0] == 100);
+ assert(bpf_map_lookup_elem(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 &&
+ assert(bpf_map_lookup_elem(fd, &key, values) == 0 &&
values[0] == 0 && values[nr_cpus - 1] == 0);
/* Check that key=2 cannot be inserted due to max_entries limit. */
@@ -296,7 +296,7 @@ static void test_arraymap_percpu(int task, void *data)
errno == E2BIG);
/* Check that key = 2 doesn't exist. */
- assert(bpf_map_lookup(fd, &key, values) == -1 && errno == ENOENT);
+ assert(bpf_map_lookup_elem(fd, &key, values) == -1 && errno == ENOENT);
/* Iterate over two elements. */
assert(bpf_map_next_key(fd, &key, &next_key) == 0 &&
@@ -338,7 +338,7 @@ static void test_arraymap_percpu_many_keys(void)
for (i = 0; i < nr_cpus; i++)
values[i] = 0;
- assert(bpf_map_lookup(fd, &key, values) == 0);
+ assert(bpf_map_lookup_elem(fd, &key, values) == 0);
for (i = 0; i < nr_cpus; i++)
assert(values[i] == i + 10);
@@ -382,9 +382,9 @@ static void test_map_large(void)
assert(bpf_map_next_key(fd, &key, &key) == -1 && errno == ENOENT);
key.c = 0;
- assert(bpf_map_lookup(fd, &key, &value) == 0 && value == 0);
+ assert(bpf_map_lookup_elem(fd, &key, &value) == 0 && value == 0);
key.a = 1;
- assert(bpf_map_lookup(fd, &key, &value) == -1 && errno == ENOENT);
+ assert(bpf_map_lookup_elem(fd, &key, &value) == -1 && errno == ENOENT);
close(fd);
}
@@ -482,7 +482,7 @@ static void test_map_parallel(void)
for (i = 0; i < MAP_SIZE; i++) {
key = MAP_SIZE - i - 1;
- assert(bpf_map_lookup(fd, &key, &value) == 0 &&
+ assert(bpf_map_lookup_elem(fd, &key, &value) == 0 &&
value == key);
}
--
2.11.0
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