Some standard C library implementations, e.g. Musl, ship the UAPI
definitions themselves to not be dependent on the UAPI headers and
their versions. Their kernel UAPI counterparts are usually guarded
with some definitions which the formers set in order to avoid
duplicate definitions.
In such cases, include order matters. Change it in two samples: in
the first, kernel UAPI ioctl definitions should go before the libc
ones, and the opposite story with the second, where the kernel
includes should go later to avoid struct redefinitions.
Fixes: b4b8faa1ded7 ("samples/bpf: sample application and documentation for AF_XDP sockets")
Fixes: e55190f26f92 ("samples/bpf: Fix build for task_fd_query_user.c")
Signed-off-by: Alexander Lobakin <[email protected]>
---
samples/bpf/task_fd_query_user.c | 2 +-
samples/bpf/xdpsock_user.c | 3 ++-
2 files changed, 3 insertions(+), 2 deletions(-)
diff --git a/samples/bpf/task_fd_query_user.c b/samples/bpf/task_fd_query_user.c
index 424718c0872c..5d3a60547f9f 100644
--- a/samples/bpf/task_fd_query_user.c
+++ b/samples/bpf/task_fd_query_user.c
@@ -9,10 +9,10 @@
#include <stdint.h>
#include <fcntl.h>
#include <linux/bpf.h>
+#include <linux/perf_event.h>
#include <sys/ioctl.h>
#include <sys/types.h>
#include <sys/stat.h>
-#include <linux/perf_event.h>
#include <bpf/bpf.h>
#include <bpf/libbpf.h>
diff --git a/samples/bpf/xdpsock_user.c b/samples/bpf/xdpsock_user.c
index be7d2572e3e6..399b999fcec2 100644
--- a/samples/bpf/xdpsock_user.c
+++ b/samples/bpf/xdpsock_user.c
@@ -7,14 +7,15 @@
#include <linux/bpf.h>
#include <linux/if_link.h>
#include <linux/if_xdp.h>
-#include <linux/if_ether.h>
#include <linux/ip.h>
#include <linux/limits.h>
+#include <linux/net.h>
#include <linux/udp.h>
#include <arpa/inet.h>
#include <locale.h>
#include <net/ethernet.h>
#include <netinet/ether.h>
+#include <linux/if_ether.h>
#include <net/if.h>
#include <poll.h>
#include <pthread.h>
--
2.35.2
On Thu, Apr 14, 2022 at 3:47 PM Alexander Lobakin <[email protected]> wrote:
>
> Some standard C library implementations, e.g. Musl, ship the UAPI
> definitions themselves to not be dependent on the UAPI headers and
> their versions. Their kernel UAPI counterparts are usually guarded
> with some definitions which the formers set in order to avoid
> duplicate definitions.
> In such cases, include order matters. Change it in two samples: in
> the first, kernel UAPI ioctl definitions should go before the libc
> ones, and the opposite story with the second, where the kernel
> includes should go later to avoid struct redefinitions.
>
> Fixes: b4b8faa1ded7 ("samples/bpf: sample application and documentation for AF_XDP sockets")
> Fixes: e55190f26f92 ("samples/bpf: Fix build for task_fd_query_user.c")
> Signed-off-by: Alexander Lobakin <[email protected]>
Acked-by: Song Liu <[email protected]>
> ---
> samples/bpf/task_fd_query_user.c | 2 +-
> samples/bpf/xdpsock_user.c | 3 ++-
> 2 files changed, 3 insertions(+), 2 deletions(-)
>
> diff --git a/samples/bpf/task_fd_query_user.c b/samples/bpf/task_fd_query_user.c
> index 424718c0872c..5d3a60547f9f 100644
> --- a/samples/bpf/task_fd_query_user.c
> +++ b/samples/bpf/task_fd_query_user.c
> @@ -9,10 +9,10 @@
> #include <stdint.h>
> #include <fcntl.h>
> #include <linux/bpf.h>
> +#include <linux/perf_event.h>
> #include <sys/ioctl.h>
> #include <sys/types.h>
> #include <sys/stat.h>
> -#include <linux/perf_event.h>
>
> #include <bpf/bpf.h>
> #include <bpf/libbpf.h>
> diff --git a/samples/bpf/xdpsock_user.c b/samples/bpf/xdpsock_user.c
> index be7d2572e3e6..399b999fcec2 100644
> --- a/samples/bpf/xdpsock_user.c
> +++ b/samples/bpf/xdpsock_user.c
> @@ -7,14 +7,15 @@
> #include <linux/bpf.h>
> #include <linux/if_link.h>
> #include <linux/if_xdp.h>
> -#include <linux/if_ether.h>
> #include <linux/ip.h>
> #include <linux/limits.h>
> +#include <linux/net.h>
> #include <linux/udp.h>
> #include <arpa/inet.h>
> #include <locale.h>
> #include <net/ethernet.h>
> #include <netinet/ether.h>
> +#include <linux/if_ether.h>
> #include <net/if.h>
> #include <poll.h>
> #include <pthread.h>
> --
> 2.35.2
>
>