diff options
| -rw-r--r-- | include/linux/btf.h | 1 | ||||
| -rw-r--r-- | net/ipv4/tcp.c | 12 |
2 files changed, 13 insertions, 0 deletions
diff --git a/include/linux/btf.h b/include/linux/btf.h index 7fabf1428093..9c1b52738bbe 100644 --- a/include/linux/btf.h +++ b/include/linux/btf.h @@ -9,6 +9,7 @@ #include <uapi/linux/bpf.h> #define BTF_TYPE_EMIT(type) ((void)(type *)0) +#define BTF_TYPE_EMIT_ENUM(enum_val) ((void)enum_val) struct btf; struct btf_member; diff --git a/net/ipv4/tcp.c b/net/ipv4/tcp.c index de7cc8445ac0..e14fd0c50c10 100644 --- a/net/ipv4/tcp.c +++ b/net/ipv4/tcp.c @@ -267,6 +267,7 @@ #include <linux/slab.h> #include <linux/errqueue.h> #include <linux/static_key.h> +#include <linux/btf.h> #include <net/icmp.h> #include <net/inet_common.h> @@ -2587,6 +2588,17 @@ void tcp_set_state(struct sock *sk, int state) BUILD_BUG_ON((int)BPF_TCP_NEW_SYN_RECV != (int)TCP_NEW_SYN_RECV); BUILD_BUG_ON((int)BPF_TCP_MAX_STATES != (int)TCP_MAX_STATES); + /* bpf uapi header bpf.h defines an anonymous enum with values + * BPF_TCP_* used by bpf programs. Currently gcc built vmlinux + * is able to emit this enum in DWARF due to the above BUILD_BUG_ON. + * But clang built vmlinux does not have this enum in DWARF + * since clang removes the above code before generating IR/debuginfo. + * Let us explicitly emit the type debuginfo to ensure the + * above-mentioned anonymous enum in the vmlinux DWARF and hence BTF + * regardless of which compiler is used. + */ + BTF_TYPE_EMIT_ENUM(BPF_TCP_ESTABLISHED); + if (BPF_SOCK_OPS_TEST_FLAG(tcp_sk(sk), BPF_SOCK_OPS_STATE_CB_FLAG)) tcp_call_bpf_2arg(sk, BPF_SOCK_OPS_STATE_CB, oldstate, state); |