diff mbox series

[bpf-next,v5,2/5] libbpf: Add bpf_link support for BPF_PROG_TYPE_SOCKMAP

Message ID 20240406160409.178297-1-yonghong.song@linux.dev (mailing list archive)
State Superseded
Delegated to: BPF
Headers show
Series bpf: Add bpf_link support for sk_msg and sk_skb progs | expand

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bpf/vmtest-bpf-next-PR fail PR summary
bpf/vmtest-bpf-next-VM_Test-15 success Logs for s390x-gcc / test (test_progs_no_alu32, false, 360) / test_progs_no_alu32 on s390x with gcc
netdev/series_format success Posting correctly formatted
netdev/tree_selection success Clearly marked for bpf-next, async
netdev/ynl success Generated files up to date; no warnings/errors; no diff in generated;
netdev/fixes_present success Fixes tag not required for -next series
netdev/header_inline success No static functions without inline keyword in header files
netdev/build_32bit success Errors and warnings before: 8 this patch: 8
netdev/build_tools success Errors and warnings before: 1 this patch: 1
netdev/cc_maintainers warning 6 maintainers not CCed: haoluo@google.com sdf@google.com kpsingh@kernel.org jolsa@kernel.org song@kernel.org martin.lau@linux.dev
netdev/build_clang success Errors and warnings before: 8 this patch: 8
netdev/verify_signedoff success Signed-off-by tag matches author and committer
netdev/deprecated_api success None detected
netdev/check_selftest success No net selftest shell script
netdev/verify_fixes success No Fixes tag
netdev/build_allmodconfig_warn success Errors and warnings before: 8 this patch: 8
netdev/checkpatch success total: 0 errors, 0 warnings, 0 checks, 42 lines checked
netdev/build_clang_rust success No Rust files in patch. Skipping build
netdev/kdoc success Errors and warnings before: 250 this patch: 250
netdev/source_inline success Was 0 now: 0

Commit Message

Yonghong Song April 6, 2024, 4:04 p.m. UTC 
Introduce a libbpf API function bpf_program__attach_sockmap()
which allow user to get a bpf_link for their corresponding programs.

Acked-by: Andrii Nakryiko <andrii@kernel.org>
Acked-by: Eduard Zingerman <eddyz87@gmail.com>
Reviewed-by: John Fastabend <john.fastabend@gmail.com>
Signed-off-by: Yonghong Song <yonghong.song@linux.dev>
---
 tools/lib/bpf/libbpf.c         | 7 +++++++
 tools/lib/bpf/libbpf.h         | 2 ++
 tools/lib/bpf/libbpf.map       | 5 +++++
 tools/lib/bpf/libbpf_version.h | 2 +-
 4 files changed, 15 insertions(+), 1 deletion(-)

Comments

Andrii Nakryiko April 6, 2024, 6:49 p.m. UTC | #1 
On Sat, Apr 6, 2024 at 9:04 AM Yonghong Song <yonghong.song@linux.dev> wrote:
>
> Introduce a libbpf API function bpf_program__attach_sockmap()
> which allow user to get a bpf_link for their corresponding programs.
>
> Acked-by: Andrii Nakryiko <andrii@kernel.org>
> Acked-by: Eduard Zingerman <eddyz87@gmail.com>
> Reviewed-by: John Fastabend <john.fastabend@gmail.com>
> Signed-off-by: Yonghong Song <yonghong.song@linux.dev>
> ---
>  tools/lib/bpf/libbpf.c         | 7 +++++++
>  tools/lib/bpf/libbpf.h         | 2 ++
>  tools/lib/bpf/libbpf.map       | 5 +++++
>  tools/lib/bpf/libbpf_version.h | 2 +-
>  4 files changed, 15 insertions(+), 1 deletion(-)
>

I feel like I mentioned this before, but maybe not. Besides there
high-level attach APIs, please also add bpf_link_create() support, it
should be very straightforward, just follow the pattern for other link
types.

You'll also get a conflict in libbpf.map given I just applied another
libbpf patches (ring_buffer__consume_n). So please rebase.

pw-bot: cr

> diff --git a/tools/lib/bpf/libbpf.c b/tools/lib/bpf/libbpf.c
> index b091154bc5b5..97eb6e5dd7c8 100644
> --- a/tools/lib/bpf/libbpf.c
> +++ b/tools/lib/bpf/libbpf.c
> @@ -149,6 +149,7 @@ static const char * const link_type_name[] = {
>         [BPF_LINK_TYPE_TCX]                     = "tcx",
>         [BPF_LINK_TYPE_UPROBE_MULTI]            = "uprobe_multi",
>         [BPF_LINK_TYPE_NETKIT]                  = "netkit",
> +       [BPF_LINK_TYPE_SOCKMAP]                 = "sockmap",
>  };
>
>  static const char * const map_type_name[] = {
> @@ -12533,6 +12534,12 @@ bpf_program__attach_netns(const struct bpf_program *prog, int netns_fd)
>         return bpf_program_attach_fd(prog, netns_fd, "netns", NULL);
>  }
>
> +struct bpf_link *
> +bpf_program__attach_sockmap(const struct bpf_program *prog, int map_fd)
> +{
> +       return bpf_program_attach_fd(prog, map_fd, "sockmap", NULL);
> +}
> +
>  struct bpf_link *bpf_program__attach_xdp(const struct bpf_program *prog, int ifindex)
>  {
>         /* target_fd/target_ifindex use the same field in LINK_CREATE */
> diff --git a/tools/lib/bpf/libbpf.h b/tools/lib/bpf/libbpf.h
> index f88ab50c0229..4c7ada03bf4f 100644
> --- a/tools/lib/bpf/libbpf.h
> +++ b/tools/lib/bpf/libbpf.h
> @@ -795,6 +795,8 @@ bpf_program__attach_cgroup(const struct bpf_program *prog, int cgroup_fd);
>  LIBBPF_API struct bpf_link *
>  bpf_program__attach_netns(const struct bpf_program *prog, int netns_fd);
>  LIBBPF_API struct bpf_link *
> +bpf_program__attach_sockmap(const struct bpf_program *prog, int map_fd);
> +LIBBPF_API struct bpf_link *
>  bpf_program__attach_xdp(const struct bpf_program *prog, int ifindex);
>  LIBBPF_API struct bpf_link *
>  bpf_program__attach_freplace(const struct bpf_program *prog,
> diff --git a/tools/lib/bpf/libbpf.map b/tools/lib/bpf/libbpf.map
> index 51732ecb1385..2d0ca3e8ec18 100644
> --- a/tools/lib/bpf/libbpf.map
> +++ b/tools/lib/bpf/libbpf.map
> @@ -416,3 +416,8 @@ LIBBPF_1.4.0 {
>                 btf__new_split;
>                 btf_ext__raw_data;
>  } LIBBPF_1.3.0;
> +
> +LIBBPF_1.5.0 {
> +       global:
> +               bpf_program__attach_sockmap;
> +} LIBBPF_1.4.0;
> diff --git a/tools/lib/bpf/libbpf_version.h b/tools/lib/bpf/libbpf_version.h
> index e783a47da815..d6e5eff967cb 100644
> --- a/tools/lib/bpf/libbpf_version.h
> +++ b/tools/lib/bpf/libbpf_version.h
> @@ -4,6 +4,6 @@
>  #define __LIBBPF_VERSION_H
>
>  #define LIBBPF_MAJOR_VERSION 1
> -#define LIBBPF_MINOR_VERSION 4
> +#define LIBBPF_MINOR_VERSION 5
>
>  #endif /* __LIBBPF_VERSION_H */
> --
> 2.43.0
>
Yonghong Song April 8, 2024, 4:54 a.m. UTC | #2 
On 4/6/24 11:49 AM, Andrii Nakryiko wrote:
> On Sat, Apr 6, 2024 at 9:04 AM Yonghong Song <yonghong.song@linux.dev> wrote:
>> Introduce a libbpf API function bpf_program__attach_sockmap()
>> which allow user to get a bpf_link for their corresponding programs.
>>
>> Acked-by: Andrii Nakryiko <andrii@kernel.org>
>> Acked-by: Eduard Zingerman <eddyz87@gmail.com>
>> Reviewed-by: John Fastabend <john.fastabend@gmail.com>
>> Signed-off-by: Yonghong Song <yonghong.song@linux.dev>
>> ---
>>   tools/lib/bpf/libbpf.c         | 7 +++++++
>>   tools/lib/bpf/libbpf.h         | 2 ++
>>   tools/lib/bpf/libbpf.map       | 5 +++++
>>   tools/lib/bpf/libbpf_version.h | 2 +-
>>   4 files changed, 15 insertions(+), 1 deletion(-)
>>
> I feel like I mentioned this before, but maybe not. Besides there
> high-level attach APIs, please also add bpf_link_create() support, it
> should be very straightforward, just follow the pattern for other link
> types.

I checked bpf_link_create() in bpf.c. bpf_link_create() works now
without any additional change sicne it does not need to set anything
in option arguments. I will add a test to use bpf_link_create()
for one of sk_msg or sk_skb programs.

>
> You'll also get a conflict in libbpf.map given I just applied another
> libbpf patches (ring_buffer__consume_n). So please rebase.

Ack.

>
> pw-bot: cr
>
>> diff --git a/tools/lib/bpf/libbpf.c b/tools/lib/bpf/libbpf.c
>> index b091154bc5b5..97eb6e5dd7c8 100644
>> --- a/tools/lib/bpf/libbpf.c
>> +++ b/tools/lib/bpf/libbpf.c
>> @@ -149,6 +149,7 @@ static const char * const link_type_name[] = {
>>          [BPF_LINK_TYPE_TCX]                     = "tcx",
>>          [BPF_LINK_TYPE_UPROBE_MULTI]            = "uprobe_multi",
>>          [BPF_LINK_TYPE_NETKIT]                  = "netkit",
>> +       [BPF_LINK_TYPE_SOCKMAP]                 = "sockmap",
>>   };
>>
>>   static const char * const map_type_name[] = {
>> @@ -12533,6 +12534,12 @@ bpf_program__attach_netns(const struct bpf_program *prog, int netns_fd)
>>          return bpf_program_attach_fd(prog, netns_fd, "netns", NULL);
>>   }
>>
>> +struct bpf_link *
>> +bpf_program__attach_sockmap(const struct bpf_program *prog, int map_fd)
>> +{
>> +       return bpf_program_attach_fd(prog, map_fd, "sockmap", NULL);
>> +}
>> +
>>   struct bpf_link *bpf_program__attach_xdp(const struct bpf_program *prog, int ifindex)
>>   {
>>          /* target_fd/target_ifindex use the same field in LINK_CREATE */
>> diff --git a/tools/lib/bpf/libbpf.h b/tools/lib/bpf/libbpf.h
>> index f88ab50c0229..4c7ada03bf4f 100644
>> --- a/tools/lib/bpf/libbpf.h
>> +++ b/tools/lib/bpf/libbpf.h
>> @@ -795,6 +795,8 @@ bpf_program__attach_cgroup(const struct bpf_program *prog, int cgroup_fd);
>>   LIBBPF_API struct bpf_link *
>>   bpf_program__attach_netns(const struct bpf_program *prog, int netns_fd);
>>   LIBBPF_API struct bpf_link *
>> +bpf_program__attach_sockmap(const struct bpf_program *prog, int map_fd);
>> +LIBBPF_API struct bpf_link *
>>   bpf_program__attach_xdp(const struct bpf_program *prog, int ifindex);
>>   LIBBPF_API struct bpf_link *
>>   bpf_program__attach_freplace(const struct bpf_program *prog,
>> diff --git a/tools/lib/bpf/libbpf.map b/tools/lib/bpf/libbpf.map
>> index 51732ecb1385..2d0ca3e8ec18 100644
>> --- a/tools/lib/bpf/libbpf.map
>> +++ b/tools/lib/bpf/libbpf.map
>> @@ -416,3 +416,8 @@ LIBBPF_1.4.0 {
>>                  btf__new_split;
>>                  btf_ext__raw_data;
>>   } LIBBPF_1.3.0;
>> +
>> +LIBBPF_1.5.0 {
>> +       global:
>> +               bpf_program__attach_sockmap;
>> +} LIBBPF_1.4.0;
>> diff --git a/tools/lib/bpf/libbpf_version.h b/tools/lib/bpf/libbpf_version.h
>> index e783a47da815..d6e5eff967cb 100644
>> --- a/tools/lib/bpf/libbpf_version.h
>> +++ b/tools/lib/bpf/libbpf_version.h
>> @@ -4,6 +4,6 @@
>>   #define __LIBBPF_VERSION_H
>>
>>   #define LIBBPF_MAJOR_VERSION 1
>> -#define LIBBPF_MINOR_VERSION 4
>> +#define LIBBPF_MINOR_VERSION 5
>>
>>   #endif /* __LIBBPF_VERSION_H */
>> --
>> 2.43.0
>>
diff mbox series

Patch

diff --git a/tools/lib/bpf/libbpf.c b/tools/lib/bpf/libbpf.c
index b091154bc5b5..97eb6e5dd7c8 100644
--- a/tools/lib/bpf/libbpf.c
+++ b/tools/lib/bpf/libbpf.c
@@ -149,6 +149,7 @@  static const char * const link_type_name[] = {
 	[BPF_LINK_TYPE_TCX]			= "tcx",
 	[BPF_LINK_TYPE_UPROBE_MULTI]		= "uprobe_multi",
 	[BPF_LINK_TYPE_NETKIT]			= "netkit",
+	[BPF_LINK_TYPE_SOCKMAP]			= "sockmap",
 };
 
 static const char * const map_type_name[] = {
@@ -12533,6 +12534,12 @@  bpf_program__attach_netns(const struct bpf_program *prog, int netns_fd)
 	return bpf_program_attach_fd(prog, netns_fd, "netns", NULL);
 }
 
+struct bpf_link *
+bpf_program__attach_sockmap(const struct bpf_program *prog, int map_fd)
+{
+	return bpf_program_attach_fd(prog, map_fd, "sockmap", NULL);
+}
+
 struct bpf_link *bpf_program__attach_xdp(const struct bpf_program *prog, int ifindex)
 {
 	/* target_fd/target_ifindex use the same field in LINK_CREATE */
diff --git a/tools/lib/bpf/libbpf.h b/tools/lib/bpf/libbpf.h
index f88ab50c0229..4c7ada03bf4f 100644
--- a/tools/lib/bpf/libbpf.h
+++ b/tools/lib/bpf/libbpf.h
@@ -795,6 +795,8 @@  bpf_program__attach_cgroup(const struct bpf_program *prog, int cgroup_fd);
 LIBBPF_API struct bpf_link *
 bpf_program__attach_netns(const struct bpf_program *prog, int netns_fd);
 LIBBPF_API struct bpf_link *
+bpf_program__attach_sockmap(const struct bpf_program *prog, int map_fd);
+LIBBPF_API struct bpf_link *
 bpf_program__attach_xdp(const struct bpf_program *prog, int ifindex);
 LIBBPF_API struct bpf_link *
 bpf_program__attach_freplace(const struct bpf_program *prog,
diff --git a/tools/lib/bpf/libbpf.map b/tools/lib/bpf/libbpf.map
index 51732ecb1385..2d0ca3e8ec18 100644
--- a/tools/lib/bpf/libbpf.map
+++ b/tools/lib/bpf/libbpf.map
@@ -416,3 +416,8 @@  LIBBPF_1.4.0 {
 		btf__new_split;
 		btf_ext__raw_data;
 } LIBBPF_1.3.0;
+
+LIBBPF_1.5.0 {
+	global:
+		bpf_program__attach_sockmap;
+} LIBBPF_1.4.0;
diff --git a/tools/lib/bpf/libbpf_version.h b/tools/lib/bpf/libbpf_version.h
index e783a47da815..d6e5eff967cb 100644
--- a/tools/lib/bpf/libbpf_version.h
+++ b/tools/lib/bpf/libbpf_version.h
@@ -4,6 +4,6 @@ 
 #define __LIBBPF_VERSION_H
 
 #define LIBBPF_MAJOR_VERSION 1
-#define LIBBPF_MINOR_VERSION 4
+#define LIBBPF_MINOR_VERSION 5
 
 #endif /* __LIBBPF_VERSION_H */