diff mbox series

[bpf-next,5/6] bpf, selftests: use bpf_tail_call_static where appropriate

Message ID 0c8a5df84b2f174412c252ad32734d3545947b31.1600967205.git.daniel@iogearbox.net
State Changes Requested
Delegated to: BPF Maintainers
Headers show
Series Various BPF helper improvements | expand

Commit Message

Daniel Borkmann Sept. 24, 2020, 6:21 p.m. UTC 
For those locations where we use an immediate tail call map index use the
newly added bpf_tail_call_static() helper.

Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
---
 tools/testing/selftests/bpf/progs/bpf_flow.c  | 12 ++++----
 tools/testing/selftests/bpf/progs/tailcall1.c | 28 +++++++++----------
 tools/testing/selftests/bpf/progs/tailcall2.c | 14 +++++-----
 tools/testing/selftests/bpf/progs/tailcall3.c |  4 +--
 .../selftests/bpf/progs/tailcall_bpf2bpf1.c   |  4 +--
 .../selftests/bpf/progs/tailcall_bpf2bpf2.c   |  6 ++--
 .../selftests/bpf/progs/tailcall_bpf2bpf3.c   |  6 ++--
 .../selftests/bpf/progs/tailcall_bpf2bpf4.c   |  6 ++--
 8 files changed, 40 insertions(+), 40 deletions(-)

Comments

Maciej Fijalkowski Sept. 24, 2020, 7:25 p.m. UTC | #1 
On Thu, Sep 24, 2020 at 08:21:26PM +0200, Daniel Borkmann wrote:
> For those locations where we use an immediate tail call map index use the
> newly added bpf_tail_call_static() helper.
> 
> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
> ---
>  tools/testing/selftests/bpf/progs/bpf_flow.c  | 12 ++++----
>  tools/testing/selftests/bpf/progs/tailcall1.c | 28 +++++++++----------
>  tools/testing/selftests/bpf/progs/tailcall2.c | 14 +++++-----
>  tools/testing/selftests/bpf/progs/tailcall3.c |  4 +--
>  .../selftests/bpf/progs/tailcall_bpf2bpf1.c   |  4 +--
>  .../selftests/bpf/progs/tailcall_bpf2bpf2.c   |  6 ++--
>  .../selftests/bpf/progs/tailcall_bpf2bpf3.c   |  6 ++--
>  .../selftests/bpf/progs/tailcall_bpf2bpf4.c   |  6 ++--
>  8 files changed, 40 insertions(+), 40 deletions(-)

One nit, while you're at it, maybe it would be good to also address the
samples/bpf/sockex3_kern.c that is also using the immediate map index?

[...]
Daniel Borkmann Sept. 24, 2020, 10:03 p.m. UTC | #2 
On 9/24/20 9:25 PM, Maciej Fijalkowski wrote:
> On Thu, Sep 24, 2020 at 08:21:26PM +0200, Daniel Borkmann wrote:
>> For those locations where we use an immediate tail call map index use the
>> newly added bpf_tail_call_static() helper.
>>
>> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
>> ---
>>   tools/testing/selftests/bpf/progs/bpf_flow.c  | 12 ++++----
>>   tools/testing/selftests/bpf/progs/tailcall1.c | 28 +++++++++----------
>>   tools/testing/selftests/bpf/progs/tailcall2.c | 14 +++++-----
>>   tools/testing/selftests/bpf/progs/tailcall3.c |  4 +--
>>   .../selftests/bpf/progs/tailcall_bpf2bpf1.c   |  4 +--
>>   .../selftests/bpf/progs/tailcall_bpf2bpf2.c   |  6 ++--
>>   .../selftests/bpf/progs/tailcall_bpf2bpf3.c   |  6 ++--
>>   .../selftests/bpf/progs/tailcall_bpf2bpf4.c   |  6 ++--
>>   8 files changed, 40 insertions(+), 40 deletions(-)
> 
> One nit, while you're at it, maybe it would be good to also address the
> samples/bpf/sockex3_kern.c that is also using the immediate map index?

Sure, np, will add.
diff mbox series

Patch

diff --git a/tools/testing/selftests/bpf/progs/bpf_flow.c b/tools/testing/selftests/bpf/progs/bpf_flow.c
index de6de9221518..5a65f6b51377 100644
--- a/tools/testing/selftests/bpf/progs/bpf_flow.c
+++ b/tools/testing/selftests/bpf/progs/bpf_flow.c
@@ -118,18 +118,18 @@  static __always_inline int parse_eth_proto(struct __sk_buff *skb, __be16 proto)
 
 	switch (proto) {
 	case bpf_htons(ETH_P_IP):
-		bpf_tail_call(skb, &jmp_table, IP);
+		bpf_tail_call_static(skb, &jmp_table, IP);
 		break;
 	case bpf_htons(ETH_P_IPV6):
-		bpf_tail_call(skb, &jmp_table, IPV6);
+		bpf_tail_call_static(skb, &jmp_table, IPV6);
 		break;
 	case bpf_htons(ETH_P_MPLS_MC):
 	case bpf_htons(ETH_P_MPLS_UC):
-		bpf_tail_call(skb, &jmp_table, MPLS);
+		bpf_tail_call_static(skb, &jmp_table, MPLS);
 		break;
 	case bpf_htons(ETH_P_8021Q):
 	case bpf_htons(ETH_P_8021AD):
-		bpf_tail_call(skb, &jmp_table, VLAN);
+		bpf_tail_call_static(skb, &jmp_table, VLAN);
 		break;
 	default:
 		/* Protocol not supported */
@@ -246,10 +246,10 @@  static __always_inline int parse_ipv6_proto(struct __sk_buff *skb, __u8 nexthdr)
 	switch (nexthdr) {
 	case IPPROTO_HOPOPTS:
 	case IPPROTO_DSTOPTS:
-		bpf_tail_call(skb, &jmp_table, IPV6OP);
+		bpf_tail_call_static(skb, &jmp_table, IPV6OP);
 		break;
 	case IPPROTO_FRAGMENT:
-		bpf_tail_call(skb, &jmp_table, IPV6FR);
+		bpf_tail_call_static(skb, &jmp_table, IPV6FR);
 		break;
 	default:
 		return parse_ip_proto(skb, nexthdr);
diff --git a/tools/testing/selftests/bpf/progs/tailcall1.c b/tools/testing/selftests/bpf/progs/tailcall1.c
index 1f407e65ae52..7115bcefbe8a 100644
--- a/tools/testing/selftests/bpf/progs/tailcall1.c
+++ b/tools/testing/selftests/bpf/progs/tailcall1.c
@@ -26,20 +26,20 @@  int entry(struct __sk_buff *skb)
 	/* Multiple locations to make sure we patch
 	 * all of them.
 	 */
-	bpf_tail_call(skb, &jmp_table, 0);
-	bpf_tail_call(skb, &jmp_table, 0);
-	bpf_tail_call(skb, &jmp_table, 0);
-	bpf_tail_call(skb, &jmp_table, 0);
-
-	bpf_tail_call(skb, &jmp_table, 1);
-	bpf_tail_call(skb, &jmp_table, 1);
-	bpf_tail_call(skb, &jmp_table, 1);
-	bpf_tail_call(skb, &jmp_table, 1);
-
-	bpf_tail_call(skb, &jmp_table, 2);
-	bpf_tail_call(skb, &jmp_table, 2);
-	bpf_tail_call(skb, &jmp_table, 2);
-	bpf_tail_call(skb, &jmp_table, 2);
+	bpf_tail_call_static(skb, &jmp_table, 0);
+	bpf_tail_call_static(skb, &jmp_table, 0);
+	bpf_tail_call_static(skb, &jmp_table, 0);
+	bpf_tail_call_static(skb, &jmp_table, 0);
+
+	bpf_tail_call_static(skb, &jmp_table, 1);
+	bpf_tail_call_static(skb, &jmp_table, 1);
+	bpf_tail_call_static(skb, &jmp_table, 1);
+	bpf_tail_call_static(skb, &jmp_table, 1);
+
+	bpf_tail_call_static(skb, &jmp_table, 2);
+	bpf_tail_call_static(skb, &jmp_table, 2);
+	bpf_tail_call_static(skb, &jmp_table, 2);
+	bpf_tail_call_static(skb, &jmp_table, 2);
 
 	return 3;
 }
diff --git a/tools/testing/selftests/bpf/progs/tailcall2.c b/tools/testing/selftests/bpf/progs/tailcall2.c
index a093e739cf0e..0431e4fe7efd 100644
--- a/tools/testing/selftests/bpf/progs/tailcall2.c
+++ b/tools/testing/selftests/bpf/progs/tailcall2.c
@@ -13,14 +13,14 @@  struct {
 SEC("classifier/0")
 int bpf_func_0(struct __sk_buff *skb)
 {
-	bpf_tail_call(skb, &jmp_table, 1);
+	bpf_tail_call_static(skb, &jmp_table, 1);
 	return 0;
 }
 
 SEC("classifier/1")
 int bpf_func_1(struct __sk_buff *skb)
 {
-	bpf_tail_call(skb, &jmp_table, 2);
+	bpf_tail_call_static(skb, &jmp_table, 2);
 	return 1;
 }
 
@@ -33,25 +33,25 @@  int bpf_func_2(struct __sk_buff *skb)
 SEC("classifier/3")
 int bpf_func_3(struct __sk_buff *skb)
 {
-	bpf_tail_call(skb, &jmp_table, 4);
+	bpf_tail_call_static(skb, &jmp_table, 4);
 	return 3;
 }
 
 SEC("classifier/4")
 int bpf_func_4(struct __sk_buff *skb)
 {
-	bpf_tail_call(skb, &jmp_table, 3);
+	bpf_tail_call_static(skb, &jmp_table, 3);
 	return 4;
 }
 
 SEC("classifier")
 int entry(struct __sk_buff *skb)
 {
-	bpf_tail_call(skb, &jmp_table, 0);
+	bpf_tail_call_static(skb, &jmp_table, 0);
 	/* Check multi-prog update. */
-	bpf_tail_call(skb, &jmp_table, 2);
+	bpf_tail_call_static(skb, &jmp_table, 2);
 	/* Check tail call limit. */
-	bpf_tail_call(skb, &jmp_table, 3);
+	bpf_tail_call_static(skb, &jmp_table, 3);
 	return 3;
 }
 
diff --git a/tools/testing/selftests/bpf/progs/tailcall3.c b/tools/testing/selftests/bpf/progs/tailcall3.c
index cabda877cf0a..739dc2a51e74 100644
--- a/tools/testing/selftests/bpf/progs/tailcall3.c
+++ b/tools/testing/selftests/bpf/progs/tailcall3.c
@@ -16,14 +16,14 @@  SEC("classifier/0")
 int bpf_func_0(struct __sk_buff *skb)
 {
 	count++;
-	bpf_tail_call(skb, &jmp_table, 0);
+	bpf_tail_call_static(skb, &jmp_table, 0);
 	return 1;
 }
 
 SEC("classifier")
 int entry(struct __sk_buff *skb)
 {
-	bpf_tail_call(skb, &jmp_table, 0);
+	bpf_tail_call_static(skb, &jmp_table, 0);
 	return 0;
 }
 
diff --git a/tools/testing/selftests/bpf/progs/tailcall_bpf2bpf1.c b/tools/testing/selftests/bpf/progs/tailcall_bpf2bpf1.c
index b5d9c8e778ae..0103f3dd9f02 100644
--- a/tools/testing/selftests/bpf/progs/tailcall_bpf2bpf1.c
+++ b/tools/testing/selftests/bpf/progs/tailcall_bpf2bpf1.c
@@ -21,7 +21,7 @@  TAIL_FUNC(1)
 static __noinline
 int subprog_tail(struct __sk_buff *skb)
 {
-	bpf_tail_call(skb, &jmp_table, 0);
+	bpf_tail_call_static(skb, &jmp_table, 0);
 
 	return skb->len * 2;
 }
@@ -29,7 +29,7 @@  int subprog_tail(struct __sk_buff *skb)
 SEC("classifier")
 int entry(struct __sk_buff *skb)
 {
-	bpf_tail_call(skb, &jmp_table, 1);
+	bpf_tail_call_static(skb, &jmp_table, 1);
 
 	return subprog_tail(skb);
 }
diff --git a/tools/testing/selftests/bpf/progs/tailcall_bpf2bpf2.c b/tools/testing/selftests/bpf/progs/tailcall_bpf2bpf2.c
index a004ab28ce28..7b1c04183824 100644
--- a/tools/testing/selftests/bpf/progs/tailcall_bpf2bpf2.c
+++ b/tools/testing/selftests/bpf/progs/tailcall_bpf2bpf2.c
@@ -14,9 +14,9 @@  static __noinline
 int subprog_tail(struct __sk_buff *skb)
 {
 	if (load_byte(skb, 0))
-		bpf_tail_call(skb, &jmp_table, 1);
+		bpf_tail_call_static(skb, &jmp_table, 1);
 	else
-		bpf_tail_call(skb, &jmp_table, 0);
+		bpf_tail_call_static(skb, &jmp_table, 0);
 	return 1;
 }
 
@@ -32,7 +32,7 @@  int bpf_func_0(struct __sk_buff *skb)
 SEC("classifier")
 int entry(struct __sk_buff *skb)
 {
-	bpf_tail_call(skb, &jmp_table, 0);
+	bpf_tail_call_static(skb, &jmp_table, 0);
 
 	return 0;
 }
diff --git a/tools/testing/selftests/bpf/progs/tailcall_bpf2bpf3.c b/tools/testing/selftests/bpf/progs/tailcall_bpf2bpf3.c
index 96dbef2b6b7c..0d5482bea6c9 100644
--- a/tools/testing/selftests/bpf/progs/tailcall_bpf2bpf3.c
+++ b/tools/testing/selftests/bpf/progs/tailcall_bpf2bpf3.c
@@ -16,9 +16,9 @@  int subprog_tail2(struct __sk_buff *skb)
 	volatile char arr[64] = {};
 
 	if (load_word(skb, 0) || load_half(skb, 0))
-		bpf_tail_call(skb, &jmp_table, 10);
+		bpf_tail_call_static(skb, &jmp_table, 10);
 	else
-		bpf_tail_call(skb, &jmp_table, 1);
+		bpf_tail_call_static(skb, &jmp_table, 1);
 
 	return skb->len;
 }
@@ -28,7 +28,7 @@  int subprog_tail(struct __sk_buff *skb)
 {
 	volatile char arr[64] = {};
 
-	bpf_tail_call(skb, &jmp_table, 0);
+	bpf_tail_call_static(skb, &jmp_table, 0);
 
 	return skb->len * 2;
 }
diff --git a/tools/testing/selftests/bpf/progs/tailcall_bpf2bpf4.c b/tools/testing/selftests/bpf/progs/tailcall_bpf2bpf4.c
index 98b40a95bc67..9a1b166b7fbe 100644
--- a/tools/testing/selftests/bpf/progs/tailcall_bpf2bpf4.c
+++ b/tools/testing/selftests/bpf/progs/tailcall_bpf2bpf4.c
@@ -14,21 +14,21 @@  static volatile int count;
 __noinline
 int subprog_tail_2(struct __sk_buff *skb)
 {
-	bpf_tail_call(skb, &jmp_table, 2);
+	bpf_tail_call_static(skb, &jmp_table, 2);
 	return skb->len * 3;
 }
 
 __noinline
 int subprog_tail_1(struct __sk_buff *skb)
 {
-	bpf_tail_call(skb, &jmp_table, 1);
+	bpf_tail_call_static(skb, &jmp_table, 1);
 	return skb->len * 2;
 }
 
 __noinline
 int subprog_tail(struct __sk_buff *skb)
 {
-	bpf_tail_call(skb, &jmp_table, 0);
+	bpf_tail_call_static(skb, &jmp_table, 0);
 	return skb->len;
 }