* [PATCH bpf-next] selftest/bpf: make bpf_iter selftest compilable against old vmlinux.h
@ 2020-05-18 23:45 Andrii Nakryiko
2020-05-19 1:42 ` Yonghong Song
2020-05-19 18:44 ` Alexei Starovoitov
0 siblings, 2 replies; 4+ messages in thread
From: Andrii Nakryiko @ 2020-05-18 23:45 UTC (permalink / raw)
To: bpf, netdev, ast, daniel
Cc: andrii.nakryiko, kernel-team, Andrii Nakryiko,
Jesper Dangaard Brouer, Yonghong Song
It's good to be able to compile bpf_iter selftest even on systems that don't
have the very latest vmlinux.h, e.g., for libbpf tests against older kernels in
Travis CI. To that extent, re-define bpf_iter_meta and corresponding bpf_iter
context structs in each selftest. To avoid type clashes with vmlinux.h, rename
vmlinux.h's definitions to get them out of the way.
Cc: Jesper Dangaard Brouer <brouer@redhat.com>
Cc: Yonghong Song <yhs@fb.com>
Signed-off-by: Andrii Nakryiko <andriin@fb.com>
---
.../selftests/bpf/progs/bpf_iter_bpf_map.c | 16 ++++++++++++++++
.../selftests/bpf/progs/bpf_iter_ipv6_route.c | 16 ++++++++++++++++
.../selftests/bpf/progs/bpf_iter_netlink.c | 16 ++++++++++++++++
.../selftests/bpf/progs/bpf_iter_task.c | 16 ++++++++++++++++
.../selftests/bpf/progs/bpf_iter_task_file.c | 18 ++++++++++++++++++
.../bpf/progs/bpf_iter_test_kern_common.h | 16 ++++++++++++++++
6 files changed, 98 insertions(+)
diff --git a/tools/testing/selftests/bpf/progs/bpf_iter_bpf_map.c b/tools/testing/selftests/bpf/progs/bpf_iter_bpf_map.c
index 4867cd3445c8..b57bd6fef208 100644
--- a/tools/testing/selftests/bpf/progs/bpf_iter_bpf_map.c
+++ b/tools/testing/selftests/bpf/progs/bpf_iter_bpf_map.c
@@ -1,11 +1,27 @@
// SPDX-License-Identifier: GPL-2.0
/* Copyright (c) 2020 Facebook */
+/* "undefine" structs in vmlinux.h, because we "override" them below */
+#define bpf_iter_meta bpf_iter_meta___not_used
+#define bpf_iter__bpf_map bpf_iter__bpf_map___not_used
#include "vmlinux.h"
+#undef bpf_iter_meta
+#undef bpf_iter__bpf_map
#include <bpf/bpf_helpers.h>
#include <bpf/bpf_tracing.h>
char _license[] SEC("license") = "GPL";
+struct bpf_iter_meta {
+ struct seq_file *seq;
+ __u64 session_id;
+ __u64 seq_num;
+} __attribute__((preserve_access_index));
+
+struct bpf_iter__bpf_map {
+ struct bpf_iter_meta *meta;
+ struct bpf_map *map;
+} __attribute__((preserve_access_index));
+
SEC("iter/bpf_map")
int dump_bpf_map(struct bpf_iter__bpf_map *ctx)
{
diff --git a/tools/testing/selftests/bpf/progs/bpf_iter_ipv6_route.c b/tools/testing/selftests/bpf/progs/bpf_iter_ipv6_route.c
index ab9e2650e021..c8e9ca74c87b 100644
--- a/tools/testing/selftests/bpf/progs/bpf_iter_ipv6_route.c
+++ b/tools/testing/selftests/bpf/progs/bpf_iter_ipv6_route.c
@@ -1,9 +1,25 @@
// SPDX-License-Identifier: GPL-2.0
/* Copyright (c) 2020 Facebook */
+/* "undefine" structs in vmlinux.h, because we "override" them below */
+#define bpf_iter_meta bpf_iter_meta___not_used
+#define bpf_iter__ipv6_route bpf_iter__ipv6_route___not_used
#include "vmlinux.h"
+#undef bpf_iter_meta
+#undef bpf_iter__ipv6_route
#include <bpf/bpf_helpers.h>
#include <bpf/bpf_tracing.h>
+struct bpf_iter_meta {
+ struct seq_file *seq;
+ __u64 session_id;
+ __u64 seq_num;
+} __attribute__((preserve_access_index));
+
+struct bpf_iter__ipv6_route {
+ struct bpf_iter_meta *meta;
+ struct fib6_info *rt;
+} __attribute__((preserve_access_index));
+
char _license[] SEC("license") = "GPL";
extern bool CONFIG_IPV6_SUBTREES __kconfig __weak;
diff --git a/tools/testing/selftests/bpf/progs/bpf_iter_netlink.c b/tools/testing/selftests/bpf/progs/bpf_iter_netlink.c
index 6b40a233d4e0..e7b8753eac0b 100644
--- a/tools/testing/selftests/bpf/progs/bpf_iter_netlink.c
+++ b/tools/testing/selftests/bpf/progs/bpf_iter_netlink.c
@@ -1,6 +1,11 @@
// SPDX-License-Identifier: GPL-2.0
/* Copyright (c) 2020 Facebook */
+/* "undefine" structs in vmlinux.h, because we "override" them below */
+#define bpf_iter_meta bpf_iter_meta___not_used
+#define bpf_iter__netlink bpf_iter__netlink___not_used
#include "vmlinux.h"
+#undef bpf_iter_meta
+#undef bpf_iter__netlink
#include <bpf/bpf_helpers.h>
#include <bpf/bpf_tracing.h>
@@ -9,6 +14,17 @@ char _license[] SEC("license") = "GPL";
#define sk_rmem_alloc sk_backlog.rmem_alloc
#define sk_refcnt __sk_common.skc_refcnt
+struct bpf_iter_meta {
+ struct seq_file *seq;
+ __u64 session_id;
+ __u64 seq_num;
+} __attribute__((preserve_access_index));
+
+struct bpf_iter__netlink {
+ struct bpf_iter_meta *meta;
+ struct netlink_sock *sk;
+} __attribute__((preserve_access_index));
+
static inline struct inode *SOCK_INODE(struct socket *socket)
{
return &container_of(socket, struct socket_alloc, socket)->vfs_inode;
diff --git a/tools/testing/selftests/bpf/progs/bpf_iter_task.c b/tools/testing/selftests/bpf/progs/bpf_iter_task.c
index 90f9011c57ca..ee754021f98e 100644
--- a/tools/testing/selftests/bpf/progs/bpf_iter_task.c
+++ b/tools/testing/selftests/bpf/progs/bpf_iter_task.c
@@ -1,11 +1,27 @@
// SPDX-License-Identifier: GPL-2.0
/* Copyright (c) 2020 Facebook */
+/* "undefine" structs in vmlinux.h, because we "override" them below */
+#define bpf_iter_meta bpf_iter_meta___not_used
+#define bpf_iter__task bpf_iter__task___not_used
#include "vmlinux.h"
+#undef bpf_iter_meta
+#undef bpf_iter__task
#include <bpf/bpf_helpers.h>
#include <bpf/bpf_tracing.h>
char _license[] SEC("license") = "GPL";
+struct bpf_iter_meta {
+ struct seq_file *seq;
+ __u64 session_id;
+ __u64 seq_num;
+} __attribute__((preserve_access_index));
+
+struct bpf_iter__task {
+ struct bpf_iter_meta *meta;
+ struct task_struct *task;
+} __attribute__((preserve_access_index));
+
SEC("iter/task")
int dump_task(struct bpf_iter__task *ctx)
{
diff --git a/tools/testing/selftests/bpf/progs/bpf_iter_task_file.c b/tools/testing/selftests/bpf/progs/bpf_iter_task_file.c
index c6ced38f0880..0f0ec3db20ba 100644
--- a/tools/testing/selftests/bpf/progs/bpf_iter_task_file.c
+++ b/tools/testing/selftests/bpf/progs/bpf_iter_task_file.c
@@ -1,11 +1,29 @@
// SPDX-License-Identifier: GPL-2.0
/* Copyright (c) 2020 Facebook */
+/* "undefine" structs in vmlinux.h, because we "override" them below */
+#define bpf_iter_meta bpf_iter_meta___not_used
+#define bpf_iter__task_file bpf_iter__task_file___not_used
#include "vmlinux.h"
+#undef bpf_iter_meta
+#undef bpf_iter__task_file
#include <bpf/bpf_helpers.h>
#include <bpf/bpf_tracing.h>
char _license[] SEC("license") = "GPL";
+struct bpf_iter_meta {
+ struct seq_file *seq;
+ __u64 session_id;
+ __u64 seq_num;
+} __attribute__((preserve_access_index));
+
+struct bpf_iter__task_file {
+ struct bpf_iter_meta *meta;
+ struct task_struct *task;
+ __u32 fd;
+ struct file *file;
+} __attribute__((preserve_access_index));
+
SEC("iter/task_file")
int dump_task_file(struct bpf_iter__task_file *ctx)
{
diff --git a/tools/testing/selftests/bpf/progs/bpf_iter_test_kern_common.h b/tools/testing/selftests/bpf/progs/bpf_iter_test_kern_common.h
index bdd51cf14b54..dee1339e6905 100644
--- a/tools/testing/selftests/bpf/progs/bpf_iter_test_kern_common.h
+++ b/tools/testing/selftests/bpf/progs/bpf_iter_test_kern_common.h
@@ -1,11 +1,27 @@
/* SPDX-License-Identifier: GPL-2.0 */
/* Copyright (c) 2020 Facebook */
+/* "undefine" structs in vmlinux.h, because we "override" them below */
+#define bpf_iter_meta bpf_iter_meta___not_used
+#define bpf_iter__task bpf_iter__task___not_used
#include "vmlinux.h"
+#undef bpf_iter_meta
+#undef bpf_iter__task
#include <bpf/bpf_helpers.h>
char _license[] SEC("license") = "GPL";
int count = 0;
+struct bpf_iter_meta {
+ struct seq_file *seq;
+ __u64 session_id;
+ __u64 seq_num;
+} __attribute__((preserve_access_index));
+
+struct bpf_iter__task {
+ struct bpf_iter_meta *meta;
+ struct task_struct *task;
+} __attribute__((preserve_access_index));
+
SEC("iter/task")
int dump_task(struct bpf_iter__task *ctx)
{
--
2.24.1
^ permalink raw reply related [flat|nested] 4+ messages in thread
* Re: [PATCH bpf-next] selftest/bpf: make bpf_iter selftest compilable against old vmlinux.h
2020-05-18 23:45 [PATCH bpf-next] selftest/bpf: make bpf_iter selftest compilable against old vmlinux.h Andrii Nakryiko
@ 2020-05-19 1:42 ` Yonghong Song
2020-05-19 7:01 ` Jesper Dangaard Brouer
2020-05-19 18:44 ` Alexei Starovoitov
1 sibling, 1 reply; 4+ messages in thread
From: Yonghong Song @ 2020-05-19 1:42 UTC (permalink / raw)
To: Andrii Nakryiko, bpf, netdev, ast, daniel
Cc: andrii.nakryiko, kernel-team, Jesper Dangaard Brouer
On 5/18/20 4:45 PM, Andrii Nakryiko wrote:
> It's good to be able to compile bpf_iter selftest even on systems that don't
> have the very latest vmlinux.h, e.g., for libbpf tests against older kernels in
> Travis CI. To that extent, re-define bpf_iter_meta and corresponding bpf_iter
> context structs in each selftest. To avoid type clashes with vmlinux.h, rename
> vmlinux.h's definitions to get them out of the way.
>
> Cc: Jesper Dangaard Brouer <brouer@redhat.com>
> Cc: Yonghong Song <yhs@fb.com>
> Signed-off-by: Andrii Nakryiko <andriin@fb.com>
Acked-by: Yonghong Song <yhs@fb.com>
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: [PATCH bpf-next] selftest/bpf: make bpf_iter selftest compilable against old vmlinux.h
2020-05-19 1:42 ` Yonghong Song
@ 2020-05-19 7:01 ` Jesper Dangaard Brouer
0 siblings, 0 replies; 4+ messages in thread
From: Jesper Dangaard Brouer @ 2020-05-19 7:01 UTC (permalink / raw)
To: Yonghong Song
Cc: Andrii Nakryiko, bpf, netdev, ast, daniel, andrii.nakryiko,
kernel-team, brouer
On Mon, 18 May 2020 18:42:24 -0700
Yonghong Song <yhs@fb.com> wrote:
> On 5/18/20 4:45 PM, Andrii Nakryiko wrote:
> > It's good to be able to compile bpf_iter selftest even on systems that don't
> > have the very latest vmlinux.h, e.g., for libbpf tests against older kernels in
> > Travis CI. To that extent, re-define bpf_iter_meta and corresponding bpf_iter
> > context structs in each selftest. To avoid type clashes with vmlinux.h, rename
> > vmlinux.h's definitions to get them out of the way.
> >
> > Cc: Jesper Dangaard Brouer <brouer@redhat.com>
> > Cc: Yonghong Song <yhs@fb.com>
> > Signed-off-by: Andrii Nakryiko <andriin@fb.com>
>
> Acked-by: Yonghong Song <yhs@fb.com>
Thanks for looking into this Andrii :-)
Acked-by: Jesper Dangaard Brouer <brouer@redhat.com>
--
Best regards,
Jesper Dangaard Brouer
MSc.CS, Principal Kernel Engineer at Red Hat
LinkedIn: http://www.linkedin.com/in/brouer
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: [PATCH bpf-next] selftest/bpf: make bpf_iter selftest compilable against old vmlinux.h
2020-05-18 23:45 [PATCH bpf-next] selftest/bpf: make bpf_iter selftest compilable against old vmlinux.h Andrii Nakryiko
2020-05-19 1:42 ` Yonghong Song
@ 2020-05-19 18:44 ` Alexei Starovoitov
1 sibling, 0 replies; 4+ messages in thread
From: Alexei Starovoitov @ 2020-05-19 18:44 UTC (permalink / raw)
To: Andrii Nakryiko
Cc: bpf, Network Development, Alexei Starovoitov, Daniel Borkmann,
Andrii Nakryiko, Kernel Team, Jesper Dangaard Brouer,
Yonghong Song
On Mon, May 18, 2020 at 4:49 PM Andrii Nakryiko <andriin@fb.com> wrote:
>
> It's good to be able to compile bpf_iter selftest even on systems that don't
> have the very latest vmlinux.h, e.g., for libbpf tests against older kernels in
> Travis CI. To that extent, re-define bpf_iter_meta and corresponding bpf_iter
> context structs in each selftest. To avoid type clashes with vmlinux.h, rename
> vmlinux.h's definitions to get them out of the way.
>
> Cc: Jesper Dangaard Brouer <brouer@redhat.com>
> Cc: Yonghong Song <yhs@fb.com>
> Signed-off-by: Andrii Nakryiko <andriin@fb.com>
Applied. Thanks
^ permalink raw reply [flat|nested] 4+ messages in thread
end of thread, other threads:[~2020-05-19 18:44 UTC | newest]
Thread overview: 4+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2020-05-18 23:45 [PATCH bpf-next] selftest/bpf: make bpf_iter selftest compilable against old vmlinux.h Andrii Nakryiko
2020-05-19 1:42 ` Yonghong Song
2020-05-19 7:01 ` Jesper Dangaard Brouer
2020-05-19 18:44 ` Alexei Starovoitov
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.