diff mbox series

[RFC,bpf-next,19/20] trait: Sync linux/bpf.h to tools/ for trait registration

Message ID 20250305-afabre-traits-010-rfc2-v1-19-d0ecfb869797@cloudflare.com (mailing list archive)
State RFC
Delegated to: BPF
Headers show
Series traits: Per packet metadata KV store | expand

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bpf/vmtest-bpf-next-VM_Test-16 fail Logs for s390x-gcc / test (test_progs, false, 360) / test_progs on s390x with gcc
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bpf/vmtest-bpf-next-VM_Test-33 fail Logs for x86_64-llvm-17 / GCC BPF / GCC BPF
netdev/series_format fail Series longer than 15 patches
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 fail Errors and warnings before: 136 this patch: 151
netdev/build_tools success Errors and warnings before: 27 (+0) this patch: 26 (+0)
netdev/cc_maintainers fail 3 maintainers not CCed: daniel@iogearbox.net andrii@kernel.org ast@kernel.org
netdev/build_clang success Errors and warnings before: 0 this patch: 0
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
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netdev/checkpatch success total: 0 errors, 0 warnings, 0 checks, 44 lines checked
netdev/build_clang_rust success No Rust files in patch. Skipping build
netdev/kdoc success Errors and warnings before: 0 this patch: 0
netdev/source_inline success Was 0 now: 0

Commit Message

Arthur Fabre March 5, 2025, 2:32 p.m. UTC 
From: Arthur Fabre <afabre@cloudflare.com>

Now that traits are required to be registered, the benchmarks and
selftests will need to register them.

Signed-off-by: Arthur Fabre <afabre@cloudflare.com>
---
 tools/include/uapi/linux/bpf.h | 26 ++++++++++++++++++++++++++
 1 file changed, 26 insertions(+)
diff mbox series

Patch

diff --git a/tools/include/uapi/linux/bpf.h b/tools/include/uapi/linux/bpf.h
index bb37897c039398dd3568cd007586d9b088ddeb32..748ab5a1cbe0d29d890b874aacfc4ee66b082058 100644
--- a/tools/include/uapi/linux/bpf.h
+++ b/tools/include/uapi/linux/bpf.h
@@ -906,6 +906,21 @@  union bpf_iter_link_info {
  *		A new file descriptor (a nonnegative integer), or -1 if an
  *		error occurred (in which case, *errno* is set appropriately).
  *
+ * BPF_REGISTER_TRAIT
+ *	Description
+ *		Register a trait. Docs to make bpf_doc.py not error out.
+ *	Return
+ *		Registered trait key.
+ *
+ * BPF_UNREGISTER_TRAIT
+ *	Description
+ *		Unregister a trait. Needed so services registering traits
+ *		can restart.
+ *		But what happens if a trait is currently being used?
+ *		And to in flight packets?
+ *	Return
+ *		-1 if an error occurred.
+ *
  * NOTES
  *	eBPF objects (maps and programs) can be shared between processes.
  *
@@ -961,6 +976,8 @@  enum bpf_cmd {
 	BPF_LINK_DETACH,
 	BPF_PROG_BIND_MAP,
 	BPF_TOKEN_CREATE,
+	BPF_REGISTER_TRAIT,
+	BPF_UNREGISTER_TRAIT,
 	__MAX_BPF_CMD,
 };
 
@@ -1841,6 +1858,15 @@  union bpf_attr {
 		__u32		bpffs_fd;
 	} token_create;
 
+	struct { /* struct used by BPF_REGISTER_TRAIT command */
+		char		name[BPF_OBJ_NAME_LEN];
+		__u32		flags;
+	} register_trait;
+
+	struct { /* struct used by BPF_UNREGISTER_TRAIT command */
+		__u64		trait;
+	} unregister_trait;
+
 } __attribute__((aligned(8)));
 
 /* The description below is an attempt at providing documentation to eBPF