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[bpf,v6,2/4] bpf: Call __bpf_sk_lookup()/__bpf_skc_lookup() directly via TC hookpoint

Message ID 20230621104211.301902-3-gilad9366@gmail.com (mailing list archive)
State Accepted
Delegated to: BPF
Headers show
Series Socket lookup BPF API from tc/xdp ingress does not respect VRF bindings. | expand

Checks

Context Check Description
bpf/vmtest-bpf-PR success PR summary
bpf/vmtest-bpf-VM_Test-30 success Logs for test_progs_parallel on x86_64 with llvm-16
bpf/vmtest-bpf-VM_Test-31 success Logs for test_verifier on aarch64 with gcc
bpf/vmtest-bpf-VM_Test-32 success Logs for test_verifier on s390x with gcc
bpf/vmtest-bpf-VM_Test-33 success Logs for test_verifier on x86_64 with gcc
bpf/vmtest-bpf-VM_Test-34 success Logs for test_verifier on x86_64 with llvm-16
bpf/vmtest-bpf-VM_Test-35 success Logs for veristat
bpf/vmtest-bpf-VM_Test-25 success Logs for test_verifier on aarch64 with gcc
bpf/vmtest-bpf-VM_Test-27 success Logs for test_verifier on x86_64 with gcc
bpf/vmtest-bpf-VM_Test-28 success Logs for test_verifier on x86_64 with llvm-16
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bpf/vmtest-bpf-VM_Test-15 success Logs for test_progs_no_alu32 on aarch64 with gcc
bpf/vmtest-bpf-VM_Test-17 success Logs for test_progs_no_alu32 on x86_64 with gcc
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bpf/vmtest-bpf-VM_Test-20 success Logs for test_progs_no_alu32_parallel on x86_64 with gcc
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bpf/vmtest-bpf-VM_Test-22 success Logs for test_progs_parallel on aarch64 with gcc
bpf/vmtest-bpf-VM_Test-23 success Logs for test_progs_parallel on x86_64 with gcc
bpf/vmtest-bpf-VM_Test-24 success Logs for test_progs_parallel on x86_64 with llvm-16
bpf/vmtest-bpf-VM_Test-26 success Logs for test_verifier on s390x with gcc
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bpf/vmtest-bpf-VM_Test-16 success Logs for test_progs_no_alu32 on s390x with gcc
bpf/vmtest-bpf-VM_Test-12 fail Logs for test_progs on s390x with gcc
netdev/series_format success Posting correctly formatted
netdev/tree_selection success Clearly marked for bpf, async
netdev/fixes_present success Fixes tag present in non-next series
netdev/header_inline success No static functions without inline keyword in header files
netdev/build_32bit success Errors and warnings before: 33 this patch: 33
netdev/cc_maintainers success CCed 17 of 17 maintainers
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: 33 this patch: 33
netdev/checkpatch success total: 0 errors, 0 warnings, 0 checks, 42 lines checked
netdev/kdoc success Errors and warnings before: 0 this patch: 0
netdev/source_inline success Was 0 now: 0
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Commit Message

Gilad Sever June 21, 2023, 10:42 a.m. UTC 
skb->dev always exists in the tc flow. There is no need to use
bpf_skc_lookup(), bpf_sk_lookup() from this code path.

This change facilitates fixing the tc flow to be VRF aware.

Acked-by: Stanislav Fomichev <sdf@google.com>
Reviewed-by: Shmulik Ladkani <shmulik.ladkani@gmail.com>
Reviewed-by: Eyal Birger <eyal.birger@gmail.com>
Signed-off-by: Gilad Sever <gilad9366@gmail.com>
---
 net/core/filter.c | 24 ++++++++++++++++++------
 1 file changed, 18 insertions(+), 6 deletions(-)
diff mbox series

Patch

diff --git a/net/core/filter.c b/net/core/filter.c
index 57d853460e12..e06547922edc 100644
--- a/net/core/filter.c
+++ b/net/core/filter.c
@@ -6730,8 +6730,12 @@  static const struct bpf_func_proto bpf_sk_lookup_udp_proto = {
 BPF_CALL_5(bpf_tc_skc_lookup_tcp, struct sk_buff *, skb,
 	   struct bpf_sock_tuple *, tuple, u32, len, u64, netns_id, u64, flags)
 {
-	return (unsigned long)bpf_skc_lookup(skb, tuple, len, IPPROTO_TCP,
-					     netns_id, flags);
+	struct net *caller_net = dev_net(skb->dev);
+	int ifindex = skb->dev->ifindex;
+
+	return (unsigned long)__bpf_skc_lookup(skb, tuple, len, caller_net,
+					       ifindex, IPPROTO_TCP, netns_id,
+					       flags);
 }
 
 static const struct bpf_func_proto bpf_tc_skc_lookup_tcp_proto = {
@@ -6749,8 +6753,12 @@  static const struct bpf_func_proto bpf_tc_skc_lookup_tcp_proto = {
 BPF_CALL_5(bpf_tc_sk_lookup_tcp, struct sk_buff *, skb,
 	   struct bpf_sock_tuple *, tuple, u32, len, u64, netns_id, u64, flags)
 {
-	return (unsigned long)bpf_sk_lookup(skb, tuple, len, IPPROTO_TCP,
-					    netns_id, flags);
+	struct net *caller_net = dev_net(skb->dev);
+	int ifindex = skb->dev->ifindex;
+
+	return (unsigned long)__bpf_sk_lookup(skb, tuple, len, caller_net,
+					      ifindex, IPPROTO_TCP, netns_id,
+					      flags);
 }
 
 static const struct bpf_func_proto bpf_tc_sk_lookup_tcp_proto = {
@@ -6768,8 +6776,12 @@  static const struct bpf_func_proto bpf_tc_sk_lookup_tcp_proto = {
 BPF_CALL_5(bpf_tc_sk_lookup_udp, struct sk_buff *, skb,
 	   struct bpf_sock_tuple *, tuple, u32, len, u64, netns_id, u64, flags)
 {
-	return (unsigned long)bpf_sk_lookup(skb, tuple, len, IPPROTO_UDP,
-					    netns_id, flags);
+	struct net *caller_net = dev_net(skb->dev);
+	int ifindex = skb->dev->ifindex;
+
+	return (unsigned long)__bpf_sk_lookup(skb, tuple, len, caller_net,
+					      ifindex, IPPROTO_UDP, netns_id,
+					      flags);
 }
 
 static const struct bpf_func_proto bpf_tc_sk_lookup_udp_proto = {