Since there is no convenient way for bpf program to get PAGE_SIZE
from inside of the kernel, pass the value from userspace.
Signed-off-by: Yauheni Kaliuta <yauheni.kaliuta@xxxxxxxxxx>
---
tools/testing/selftests/bpf/prog_tests/sockopt_sk.c | 2 ++
tools/testing/selftests/bpf/progs/sockopt_sk.c | 10 ++++------
2 files changed, 6 insertions(+), 6 deletions(-)
diff --git a/tools/testing/selftests/bpf/prog_tests/sockopt_sk.c b/tools/testing/selftests/bpf/prog_tests/sockopt_sk.c
index 114c1a622ffa..6a7cb5f23db2 100644
--- a/tools/testing/selftests/bpf/prog_tests/sockopt_sk.c
+++ b/tools/testing/selftests/bpf/prog_tests/sockopt_sk.c
@@ -201,6 +201,8 @@ static void run_test(int cgroup_fd)
if (CHECK(!skel, "skel_load", "sockopt_sk skeleton failed\n"))
goto cleanup;
+ skel->bss->page_size = getpagesize();
+
skel->links._setsockopt =
bpf_program__attach_cgroup(skel->progs._setsockopt, cgroup_fd);
if (CHECK(IS_ERR(skel->links._setsockopt),
diff --git a/tools/testing/selftests/bpf/progs/sockopt_sk.c b/tools/testing/selftests/bpf/progs/sockopt_sk.c
index d3597f81e6e9..55dfbe53c24e 100644
--- a/tools/testing/selftests/bpf/progs/sockopt_sk.c
+++ b/tools/testing/selftests/bpf/progs/sockopt_sk.c
@@ -8,9 +8,7 @@
char _license[] SEC("license") = "GPL";
__u32 _version SEC("version") = 1;
-#ifndef PAGE_SIZE
-#define PAGE_SIZE 4096
-#endif
+int page_size; /* userspace should set it */
#ifndef SOL_TCP
#define SOL_TCP IPPROTO_TCP
@@ -90,7 +88,7 @@ int _getsockopt(struct bpf_sockopt *ctx)
* program can only see the first PAGE_SIZE
* bytes of data.
*/
- if (optval_end - optval != PAGE_SIZE)
+ if (optval_end - optval != page_size)
return 0; /* EPERM, unexpected data size */
return 1;
@@ -161,7 +159,7 @@ int _setsockopt(struct bpf_sockopt *ctx)
if (ctx->level == SOL_IP && ctx->optname == IP_FREEBIND) {
/* Original optlen is larger than PAGE_SIZE. */
- if (ctx->optlen != PAGE_SIZE * 2)
+ if (ctx->optlen != page_size * 2)
return 0; /* EPERM, unexpected data size */
if (optval + 1 > optval_end)
@@ -175,7 +173,7 @@ int _setsockopt(struct bpf_sockopt *ctx)
* program can only see the first PAGE_SIZE
* bytes of data.
*/
- if (optval_end - optval != PAGE_SIZE)
+ if (optval_end - optval != page_size)
return 0; /* EPERM, unexpected data size */
return 1;
--
2.29.2
