diff mbox series

[RFC,net-next,3/9] xdp: implement bpf_xdp_disable_gro kfunc

Message ID e31ce8f27a672e3c0def5a586a9a10f1d71e9948.1718919473.git.yan@cloudflare.com (mailing list archive)
State RFC
Delegated to: Netdev Maintainers
Headers show
Series xdp: allow disable GRO per packet by XDP | expand

Checks

Context Check Description
netdev/series_format warning Series does not have a cover letter
netdev/tree_selection success Clearly marked for net-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: 842 this patch: 843
netdev/build_tools success No tools touched, skip
netdev/cc_maintainers success CCed 9 of 9 maintainers
netdev/build_clang fail Errors and warnings before: 849 this patch: 850
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 fail Errors and warnings before: 852 this patch: 854
netdev/checkpatch warning WARNING: line length of 88 exceeds 80 columns WARNING: line length of 90 exceeds 80 columns
netdev/build_clang_rust success No Rust files in patch. Skipping build
netdev/kdoc fail Errors and warnings before: 0 this patch: 1
netdev/source_inline success Was 0 now: 0

Commit Message

Yan Zhai June 20, 2024, 10:19 p.m. UTC 
Add a kfunc bpf_xdp_disable_gro to toggle XDP_FLAGS_GRO_DISABLED
flag.

Signed-off-by: Yan Zhai <yan@cloudflare.com>
---
 net/core/xdp.c | 27 ++++++++++++++++++++++++++-
 1 file changed, 26 insertions(+), 1 deletion(-)
diff mbox series

Patch

diff --git a/net/core/xdp.c b/net/core/xdp.c
index 41693154e426..d6e5f98a0081 100644
--- a/net/core/xdp.c
+++ b/net/core/xdp.c
@@ -770,6 +770,20 @@  __bpf_kfunc int bpf_xdp_metadata_rx_vlan_tag(const struct xdp_md *ctx,
 	return -EOPNOTSUPP;
 }
 
+/**
+ * bpf_xdp_disable_gro - Set a flag on underlying XDP buffer, indicating
+ * the stack to skip this packet for GRO processing. This flag which be
+ * passed on when the driver builds the skb.
+ *
+ * Return:
+ * * always returns 0
+ */
+__bpf_kfunc int bpf_xdp_disable_gro(struct xdp_md *ctx)
+{
+	xdp_buff_disable_gro((struct xdp_buff *)ctx);
+	return 0;
+}
+
 __bpf_kfunc_end_defs();
 
 BTF_KFUNCS_START(xdp_metadata_kfunc_ids)
@@ -799,9 +813,20 @@  bool bpf_dev_bound_kfunc_id(u32 btf_id)
 	return btf_id_set8_contains(&xdp_metadata_kfunc_ids, btf_id);
 }
 
+BTF_KFUNCS_START(xdp_common_kfunc_ids)
+BTF_ID_FLAGS(func, bpf_xdp_disable_gro, KF_TRUSTED_ARGS)
+BTF_KFUNCS_END(xdp_common_kfunc_ids)
+
+static const struct btf_kfunc_id_set xdp_common_kfunc_set = {
+	.owner = THIS_MODULE,
+	.set = &xdp_common_kfunc_ids,
+};
+
 static int __init xdp_metadata_init(void)
 {
-	return register_btf_kfunc_id_set(BPF_PROG_TYPE_XDP, &xdp_metadata_kfunc_set);
+	int ret = register_btf_kfunc_id_set(BPF_PROG_TYPE_XDP, &xdp_metadata_kfunc_set);
+
+	return ret ?: register_btf_kfunc_id_set(BPF_PROG_TYPE_XDP, &xdp_common_kfunc_set);
 }
 late_initcall(xdp_metadata_init);