tc: fix compilation with old gcc (< 4.6)

gcc < 4.6 does not handle C11 syntax for the static initialization of
anonymous struct/union, hence the following error:

tc_bpf.c:260: error: unknown field map_type specified in initializer

Signed-off-by: Julien Floret <julien.floret@6wind.com>
Signed-off-by: Nicolas Dichtel <nicolas.dichtel@6wind.com>
Acked-by: Daniel Borkmann <daniel@iogearbox.net>

diff --git a/tc/tc_bpf.c b/tc/tc_bpf.c
index 276871a5c0a5fd4d0b8187dfa16436aadb0db846..47993bad81cae1f42e39cf56b517dc57fedd6b73 100644 (file)
--- a/tc/tc_bpf.c
+++ b/tc/tc_bpf.c
@@ -257,12 +257,14 @@ static bool bpf_may_skip_map_creation(int file_fd)
 static int bpf_create_map(enum bpf_map_type type, unsigned int size_key,
                          unsigned int size_value, unsigned int max_elem)
 {
-       union bpf_attr attr = {
-               .map_type       = type,
-               .key_size       = size_key,
-               .value_size     = size_value,
-               .max_entries    = max_elem,
-       };
+       union bpf_attr attr;
+
+       memset(&attr, 0, sizeof(attr));
+
+       attr.map_type = type;
+       attr.key_size = size_key;
+       attr.value_size = size_value;
+       attr.max_entries = max_elem;
 
        return bpf(BPF_MAP_CREATE, &attr, sizeof(attr));
 }
@@ -270,12 +272,14 @@ static int bpf_create_map(enum bpf_map_type type, unsigned int size_key,
 static int bpf_update_map(int fd, const void *key, const void *value,
                          uint64_t flags)
 {
-       union bpf_attr attr = {
-               .map_fd         = fd,
-               .key            = bpf_ptr_to_u64(key),
-               .value          = bpf_ptr_to_u64(value),
-               .flags          = flags,
-       };
+       union bpf_attr attr;
+
+       memset(&attr, 0, sizeof(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));
 }
@@ -283,15 +287,17 @@ static int bpf_update_map(int fd, const void *key, const void *value,
 static int bpf_prog_load(enum bpf_prog_type type, const struct bpf_insn *insns,
                         unsigned int len, const char *license)
 {
-       union bpf_attr attr = {
-               .prog_type      = type,
-               .insns          = bpf_ptr_to_u64(insns),
-               .insn_cnt       = len / sizeof(struct bpf_insn),
-               .license        = bpf_ptr_to_u64(license),
-               .log_buf        = bpf_ptr_to_u64(bpf_log_buf),
-               .log_size       = sizeof(bpf_log_buf),
-               .log_level      = 1,
-       };
+       union bpf_attr attr;
+
+       memset(&attr, 0, sizeof(attr));
+
+       attr.prog_type = type;
+       attr.insns = bpf_ptr_to_u64(insns);
+       attr.insn_cnt = len / sizeof(struct bpf_insn);
+       attr.license = bpf_ptr_to_u64(license);
+       attr.log_buf = bpf_ptr_to_u64(bpf_log_buf);
+       attr.log_size = sizeof(bpf_log_buf);
+       attr.log_level = 1;
 
        return bpf(BPF_PROG_LOAD, &attr, sizeof(attr));
 }