[PATCH mptcp-next v3 0/6] run sched tests in a dedicated ns

[PATCH mptcp-next v3 0/6] run sched tests in a dedicated ns

[Geliang Tang]

v3:
 - add two helpers.
 - drop sched_cleanup().
 - the first two patches should be merged between the commit
 "selftests/bpf: Add mptcp sched structs" and
 "selftests/bpf: Add bpf_first scheduler".

Geliang Tang (6):
  selftests/bpf: add two mptcp netns helpers
  selftests/bpf: use random netns name for mptcp
  Squash to "selftests/bpf: Add bpf_first test"
  Squash to "selftests/bpf: Add bpf_bkup test"
  Squash to "selftests/bpf: Add bpf_rr test"
  Squash to "selftests/bpf: Add bpf_red test"

 .../testing/selftests/bpf/prog_tests/mptcp.c  | 107 +++++++++++-------
 1 file changed, 66 insertions(+), 41 deletions(-)

-- 
2.35.3

[PATCH mptcp-next v3 1/6] selftests/bpf: add two mptcp netns helpers

[Geliang Tang]

Add two netns helpers for mptcp tests: create_netns() and
cleanup_netns(). Use them in test_base().

Signed-off-by: Geliang Tang <geliang.tang@suse.com>
---
 .../testing/selftests/bpf/prog_tests/mptcp.c  | 29 +++++++++++++------
 1 file changed, 20 insertions(+), 9 deletions(-)

diff --git a/tools/testing/selftests/bpf/prog_tests/mptcp.c b/tools/testing/selftests/bpf/prog_tests/mptcp.c
index de8b6c68fc30..d008388554de 100644
--- a/tools/testing/selftests/bpf/prog_tests/mptcp.c
+++ b/tools/testing/selftests/bpf/prog_tests/mptcp.c
@@ -142,6 +142,23 @@ static int run_test(int cgroup_fd, int server_fd, bool is_mptcp)
 	return err;
 }
 
+static struct nstoken *create_netns(void)
+{
+	SYS(fail, "ip netns add %s", NS_TEST);
+	SYS(fail, "ip -net %s link set dev lo up", NS_TEST);
+
+fail:
+	return open_netns(NS_TEST);
+}
+
+static void cleanup_netns(struct nstoken *nstoken)
+{
+	if (nstoken)
+		close_netns(nstoken);
+
+	SYS_NOFAIL("ip netns del %s &> /dev/null", NS_TEST);
+}
+
 static void test_base(void)
 {
 	struct nstoken *nstoken = NULL;
@@ -151,11 +168,8 @@ static void test_base(void)
 	if (!ASSERT_GE(cgroup_fd, 0, "test__join_cgroup"))
 		return;
 
-	SYS(fail, "ip netns add %s", NS_TEST);
-	SYS(fail, "ip -net %s link set dev lo up", NS_TEST);
-
-	nstoken = open_netns(NS_TEST);
-	if (!ASSERT_OK_PTR(nstoken, "open_netns"))
+	nstoken = create_netns();
+	if (!ASSERT_OK_PTR(nstoken, "create_netns"))
 		goto fail;
 
 	/* without MPTCP */
@@ -178,10 +192,7 @@ static void test_base(void)
 	close(server_fd);
 
 fail:
-	if (nstoken)
-		close_netns(nstoken);
-
-	SYS_NOFAIL("ip netns del " NS_TEST " &> /dev/null");
+	cleanup_netns(nstoken);
 
 	close(cgroup_fd);
 }
-- 
2.35.3

[PATCH mptcp-next v3 2/6] selftests/bpf: use random netns name for mptcp

[Geliang Tang]

Use rand() to generate a random netns name instead of using the fixed
name "mptcp_ns" for every test.

Signed-off-by: Geliang Tang <geliang.tang@suse.com>
---
 tools/testing/selftests/bpf/prog_tests/mptcp.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/tools/testing/selftests/bpf/prog_tests/mptcp.c b/tools/testing/selftests/bpf/prog_tests/mptcp.c
index d008388554de..ca348bab0afe 100644
--- a/tools/testing/selftests/bpf/prog_tests/mptcp.c
+++ b/tools/testing/selftests/bpf/prog_tests/mptcp.c
@@ -11,7 +11,7 @@
 #include "mptcp_bpf_rr.skel.h"
 #include "mptcp_bpf_red.skel.h"
 
-#define NS_TEST "mptcp_ns"
+char NS_TEST[32];
 
 #ifndef TCP_CA_NAME_MAX
 #define TCP_CA_NAME_MAX	16
@@ -144,6 +144,8 @@ static int run_test(int cgroup_fd, int server_fd, bool is_mptcp)
 
 static struct nstoken *create_netns(void)
 {
+	srand(time(NULL));
+	snprintf(NS_TEST, sizeof(NS_TEST), "mptcp_ns_%d", rand());
 	SYS(fail, "ip netns add %s", NS_TEST);
 	SYS(fail, "ip -net %s link set dev lo up", NS_TEST);
 
-- 
2.35.3

[PATCH mptcp-next v3 3/6] Squash to "selftests/bpf: Add bpf_first test"

[Geliang Tang]

Run mptcp sched test in a dedicated netns.

Signed-off-by: Geliang Tang <geliang.tang@suse.com>
---
 .../testing/selftests/bpf/prog_tests/mptcp.c  | 50 +++++++++----------
 1 file changed, 25 insertions(+), 25 deletions(-)

diff --git a/tools/testing/selftests/bpf/prog_tests/mptcp.c b/tools/testing/selftests/bpf/prog_tests/mptcp.c
index ca348bab0afe..210ab5c30962 100644
--- a/tools/testing/selftests/bpf/prog_tests/mptcp.c
+++ b/tools/testing/selftests/bpf/prog_tests/mptcp.c
@@ -284,42 +284,39 @@ static void send_data(int lfd, int fd)
 #define ADDR_1	"10.0.1.1"
 #define ADDR_2	"10.0.1.2"
 
-static void sched_init(char *flags, char *sched)
+static struct nstoken *sched_init(char *flags, char *sched)
 {
-	char cmd[64];
-
-	system("ip link add veth1 type veth peer name veth2");
-	snprintf(cmd, sizeof(cmd), "ip addr add %s/24 dev veth1", ADDR_1);
-	system(cmd);
-	system("ip link set veth1 up");
-	snprintf(cmd, sizeof(cmd), "ip addr add %s/24 dev veth2", ADDR_2);
-	system(cmd);
-	system("ip link set veth2 up");
-
-	snprintf(cmd, sizeof(cmd), "ip mptcp endpoint add %s %s", ADDR_2, flags);
-	system(cmd);
-	snprintf(cmd, sizeof(cmd), "sysctl -qw net.mptcp.scheduler=%s", sched);
-	system(cmd);
-}
+	struct nstoken *nstoken;
 
-static void sched_cleanup(void)
-{
-	system("sysctl -qw net.mptcp.scheduler=default");
-	system("ip mptcp endpoint flush");
-	system("ip link del veth1");
+	nstoken = create_netns();
+	if (!ASSERT_OK_PTR(nstoken, "create_netns"))
+		goto fail;
+
+	SYS(fail, "ip -net %s link add veth1 type veth peer name veth2", NS_TEST);
+	SYS(fail, "ip -net %s addr add %s/24 dev veth1", NS_TEST, ADDR_1);
+	SYS(fail, "ip -net %s link set dev veth1 up", NS_TEST);
+	SYS(fail, "ip -net %s addr add %s/24 dev veth2", NS_TEST, ADDR_2);
+	SYS(fail, "ip -net %s link set dev veth2 up", NS_TEST);
+	SYS(fail, "ip -net %s mptcp endpoint add %s %s", NS_TEST, ADDR_2, flags);
+	SYS(fail, "ip netns exec %s sysctl -qw net.mptcp.scheduler=%s", NS_TEST, sched);
+
+fail:
+	return nstoken;
 }
 
 static int has_bytes_sent(char *addr)
 {
-	char cmd[64];
+	char cmd[128];
 
-	snprintf(cmd, sizeof(cmd), "ss -it dst %s | grep -q 'bytes_sent:'", addr);
+	snprintf(cmd, sizeof(cmd), "ip netns exec %s ss -it dst %s | grep -q bytes_sent:",
+		 NS_TEST, addr);
 	return system(cmd);
 }
 
 static void test_first(void)
 {
 	struct mptcp_bpf_first *first_skel;
+	struct nstoken *nstoken = NULL;
 	int server_fd, client_fd;
 	struct bpf_link *link;
 
@@ -333,7 +330,9 @@ static void test_first(void)
 		return;
 	}
 
-	sched_init("subflow", "bpf_first");
+	nstoken = sched_init("subflow", "bpf_first");
+	if (!ASSERT_OK_PTR(nstoken, "sched_init:bpf_first"))
+		goto fail;
 	server_fd = start_mptcp_server(AF_INET, ADDR_1, 0, 0);
 	client_fd = connect_to_fd(server_fd, 0);
 
@@ -343,7 +342,8 @@ static void test_first(void)
 
 	close(client_fd);
 	close(server_fd);
-	sched_cleanup();
+fail:
+	cleanup_netns(nstoken);
 	bpf_link__destroy(link);
 	mptcp_bpf_first__destroy(first_skel);
 }
-- 
2.35.3

[PATCH mptcp-next v3 4/6] Squash to "selftests/bpf: Add bpf_bkup test"

[Geliang Tang]

Run mptcp sched test in a dedicated netns.

Signed-off-by: Geliang Tang <geliang.tang@suse.com>
---
 tools/testing/selftests/bpf/prog_tests/mptcp.c | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/tools/testing/selftests/bpf/prog_tests/mptcp.c b/tools/testing/selftests/bpf/prog_tests/mptcp.c
index 210ab5c30962..88bef3dff24e 100644
--- a/tools/testing/selftests/bpf/prog_tests/mptcp.c
+++ b/tools/testing/selftests/bpf/prog_tests/mptcp.c
@@ -351,6 +351,7 @@ static void test_first(void)
 static void test_bkup(void)
 {
 	struct mptcp_bpf_bkup *bkup_skel;
+	struct nstoken *nstoken = NULL;
 	int server_fd, client_fd;
 	struct bpf_link *link;
 
@@ -364,7 +365,9 @@ static void test_bkup(void)
 		return;
 	}
 
-	sched_init("subflow backup", "bpf_bkup");
+	nstoken = sched_init("subflow backup", "bpf_bkup");
+	if (!ASSERT_OK_PTR(nstoken, "sched_init:bpf_bkup"))
+		goto fail;
 	server_fd = start_mptcp_server(AF_INET, ADDR_1, 0, 0);
 	client_fd = connect_to_fd(server_fd, 0);
 
@@ -374,7 +377,8 @@ static void test_bkup(void)
 
 	close(client_fd);
 	close(server_fd);
-	sched_cleanup();
+fail:
+	cleanup_netns(nstoken);
 	bpf_link__destroy(link);
 	mptcp_bpf_bkup__destroy(bkup_skel);
 }
-- 
2.35.3

[PATCH mptcp-next v3 5/6] Squash to "selftests/bpf: Add bpf_rr test"

[Geliang Tang]

Run mptcp sched test in a dedicated netns.

Signed-off-by: Geliang Tang <geliang.tang@suse.com>
---
 tools/testing/selftests/bpf/prog_tests/mptcp.c | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/tools/testing/selftests/bpf/prog_tests/mptcp.c b/tools/testing/selftests/bpf/prog_tests/mptcp.c
index 88bef3dff24e..912457da88eb 100644
--- a/tools/testing/selftests/bpf/prog_tests/mptcp.c
+++ b/tools/testing/selftests/bpf/prog_tests/mptcp.c
@@ -385,6 +385,7 @@ static void test_bkup(void)
 
 static void test_rr(void)
 {
+	struct nstoken *nstoken = NULL;
 	struct mptcp_bpf_rr *rr_skel;
 	int server_fd, client_fd;
 	struct bpf_link *link;
@@ -399,7 +400,9 @@ static void test_rr(void)
 		return;
 	}
 
-	sched_init("subflow", "bpf_rr");
+	nstoken = sched_init("subflow", "bpf_rr");
+	if (!ASSERT_OK_PTR(nstoken, "sched_init:rr"))
+		goto fail;
 	server_fd = start_mptcp_server(AF_INET, ADDR_1, 0, 0);
 	client_fd = connect_to_fd(server_fd, 0);
 
@@ -409,7 +412,8 @@ static void test_rr(void)
 
 	close(client_fd);
 	close(server_fd);
-	sched_cleanup();
+fail:
+	cleanup_netns(nstoken);
 	bpf_link__destroy(link);
 	mptcp_bpf_rr__destroy(rr_skel);
 }
-- 
2.35.3

[PATCH mptcp-next v3 6/6] Squash to "selftests/bpf: Add bpf_red test"

[Geliang Tang]

Run mptcp sched test in a dedicated netns.

Signed-off-by: Geliang Tang <geliang.tang@suse.com>
---
 tools/testing/selftests/bpf/prog_tests/mptcp.c | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/tools/testing/selftests/bpf/prog_tests/mptcp.c b/tools/testing/selftests/bpf/prog_tests/mptcp.c
index 912457da88eb..77aab18c63a0 100644
--- a/tools/testing/selftests/bpf/prog_tests/mptcp.c
+++ b/tools/testing/selftests/bpf/prog_tests/mptcp.c
@@ -421,6 +421,7 @@ static void test_rr(void)
 static void test_red(void)
 {
 	struct mptcp_bpf_red *red_skel;
+	struct nstoken *nstoken = NULL;
 	int server_fd, client_fd;
 	struct bpf_link *link;
 
@@ -434,7 +435,9 @@ static void test_red(void)
 		return;
 	}
 
-	sched_init("subflow", "bpf_red");
+	nstoken = sched_init("subflow", "bpf_red");
+	if (!ASSERT_OK_PTR(nstoken, "sched_init:bpf_red"))
+		goto fail;
 	server_fd = start_mptcp_server(AF_INET, ADDR_1, 0, 0);
 	client_fd = connect_to_fd(server_fd, 0);
 
@@ -444,7 +447,8 @@ static void test_red(void)
 
 	close(client_fd);
 	close(server_fd);
-	sched_cleanup();
+fail:
+	cleanup_netns(nstoken);
 	bpf_link__destroy(link);
 	mptcp_bpf_red__destroy(red_skel);
 }
-- 
2.35.3

Re: [PATCH mptcp-next v3 0/6] run sched tests in a dedicated ns

[Matthieu Baerts]

Hi Geliang,

On 17/05/2023 15:57, Geliang Tang wrote:
> v3:
>  - add two helpers.
>  - drop sched_cleanup().
>  - the first two patches should be merged between the commit
>  "selftests/bpf: Add mptcp sched structs" and
>  "selftests/bpf: Add bpf_first scheduler".

Thank you for this v3, it is clearer!

I just have two small last suggestions if you don't mind. The rest looks
good to me!

Cheers,
Matt
-- 
Tessares | Belgium | Hybrid Access Solutions
www.tessares.net

Re: [PATCH mptcp-next v3 1/6] selftests/bpf: add two mptcp netns helpers

[Matthieu Baerts]

Hi Geliang,

On 17/05/2023 15:57, Geliang Tang wrote:
> Add two netns helpers for mptcp tests: create_netns() and
> cleanup_netns(). Use them in test_base().
> 
> Signed-off-by: Geliang Tang <geliang.tang@suse.com>
> ---
>  .../testing/selftests/bpf/prog_tests/mptcp.c  | 29 +++++++++++++------
>  1 file changed, 20 insertions(+), 9 deletions(-)
> 
> diff --git a/tools/testing/selftests/bpf/prog_tests/mptcp.c b/tools/testing/selftests/bpf/prog_tests/mptcp.c
> index de8b6c68fc30..d008388554de 100644
> --- a/tools/testing/selftests/bpf/prog_tests/mptcp.c
> +++ b/tools/testing/selftests/bpf/prog_tests/mptcp.c
> @@ -142,6 +142,23 @@ static int run_test(int cgroup_fd, int server_fd, bool is_mptcp)
>  	return err;
>  }
>  
> +static struct nstoken *create_netns(void)
> +{
> +	SYS(fail, "ip netns add %s", NS_TEST);
> +	SYS(fail, "ip -net %s link set dev lo up", NS_TEST);
> +
> +fail:

Should you not return NULL in case of error not to start the test if the
environment is not OK?

	SYS(fail, "ip netns add %s", NS_TEST);
	SYS(fail, "ip -net %s link set dev lo up", NS_TEST);

	return open_netns(NS_TEST);

  fail:
	return NULL;

> +	return open_netns(NS_TEST);
> +}

Cheers,
Matt
-- 
Tessares | Belgium | Hybrid Access Solutions
www.tessares.net

Re: [PATCH mptcp-next v3 3/6] Squash to "selftests/bpf: Add bpf_first test"

[Matthieu Baerts]

Hi Geliang,

On 17/05/2023 15:57, Geliang Tang wrote:
> Run mptcp sched test in a dedicated netns.
> 
> Signed-off-by: Geliang Tang <geliang.tang@suse.com>
> ---
>  .../testing/selftests/bpf/prog_tests/mptcp.c  | 50 +++++++++----------
>  1 file changed, 25 insertions(+), 25 deletions(-)
> 
> diff --git a/tools/testing/selftests/bpf/prog_tests/mptcp.c b/tools/testing/selftests/bpf/prog_tests/mptcp.c
> index ca348bab0afe..210ab5c30962 100644
> --- a/tools/testing/selftests/bpf/prog_tests/mptcp.c
> +++ b/tools/testing/selftests/bpf/prog_tests/mptcp.c
> @@ -284,42 +284,39 @@ static void send_data(int lfd, int fd)
>  #define ADDR_1	"10.0.1.1"
>  #define ADDR_2	"10.0.1.2"
>  
> -static void sched_init(char *flags, char *sched)
> +static struct nstoken *sched_init(char *flags, char *sched)
>  {
> -	char cmd[64];
> -
> -	system("ip link add veth1 type veth peer name veth2");
> -	snprintf(cmd, sizeof(cmd), "ip addr add %s/24 dev veth1", ADDR_1);
> -	system(cmd);
> -	system("ip link set veth1 up");
> -	snprintf(cmd, sizeof(cmd), "ip addr add %s/24 dev veth2", ADDR_2);
> -	system(cmd);
> -	system("ip link set veth2 up");
> -
> -	snprintf(cmd, sizeof(cmd), "ip mptcp endpoint add %s %s", ADDR_2, flags);
> -	system(cmd);
> -	snprintf(cmd, sizeof(cmd), "sysctl -qw net.mptcp.scheduler=%s", sched);
> -	system(cmd);
> -}
> +	struct nstoken *nstoken;
>  
> -static void sched_cleanup(void)
> -{
> -	system("sysctl -qw net.mptcp.scheduler=default");
> -	system("ip mptcp endpoint flush");
> -	system("ip link del veth1");
> +	nstoken = create_netns();
> +	if (!ASSERT_OK_PTR(nstoken, "create_netns"))
> +		goto fail;
> +
> +	SYS(fail, "ip -net %s link add veth1 type veth peer name veth2", NS_TEST);
> +	SYS(fail, "ip -net %s addr add %s/24 dev veth1", NS_TEST, ADDR_1);
> +	SYS(fail, "ip -net %s link set dev veth1 up", NS_TEST);
> +	SYS(fail, "ip -net %s addr add %s/24 dev veth2", NS_TEST, ADDR_2);
> +	SYS(fail, "ip -net %s link set dev veth2 up", NS_TEST);
> +	SYS(fail, "ip -net %s mptcp endpoint add %s %s", NS_TEST, ADDR_2, flags);
> +	SYS(fail, "ip netns exec %s sysctl -qw net.mptcp.scheduler=%s", NS_TEST, sched);
> +
> +fail:

Same here, why not returning NULL in case of error to stop the test
earlier if it was not possible to setup the environment?

> +	return nstoken;
>  }
>  
>  static int has_bytes_sent(char *addr)
>  {
> -	char cmd[64];
> +	char cmd[128];
>  
> -	snprintf(cmd, sizeof(cmd), "ss -it dst %s | grep -q 'bytes_sent:'", addr);
> +	snprintf(cmd, sizeof(cmd), "ip netns exec %s ss -it dst %s | grep -q bytes_sent:",
> +		 NS_TEST, addr);
>  	return system(cmd);
>  }
>  
>  static void test_first(void)
>  {
>  	struct mptcp_bpf_first *first_skel;
> +	struct nstoken *nstoken = NULL;
>  	int server_fd, client_fd;
>  	struct bpf_link *link;
>  
> @@ -333,7 +330,9 @@ static void test_first(void)
>  		return;
>  	}
>  
> -	sched_init("subflow", "bpf_first");
> +	nstoken = sched_init("subflow", "bpf_first");
> +	if (!ASSERT_OK_PTR(nstoken, "sched_init:bpf_first"))
> +		goto fail;
>  	server_fd = start_mptcp_server(AF_INET, ADDR_1, 0, 0);
>  	client_fd = connect_to_fd(server_fd, 0);
>  
> @@ -343,7 +342,8 @@ static void test_first(void)
>  
>  	close(client_fd);
>  	close(server_fd);
> -	sched_cleanup();
> +fail:
> +	cleanup_netns(nstoken);
>  	bpf_link__destroy(link);
>  	mptcp_bpf_first__destroy(first_skel);
>  }

-- 
Tessares | Belgium | Hybrid Access Solutions
www.tessares.net

Re: [PATCH mptcp-next v3 5/6] Squash to "selftests/bpf: Add bpf_rr test"

[Matthieu Baerts]

Hi Geliang,

On 17/05/2023 15:57, Geliang Tang wrote:
> Run mptcp sched test in a dedicated netns.
> 
> Signed-off-by: Geliang Tang <geliang.tang@suse.com>
> ---
>  tools/testing/selftests/bpf/prog_tests/mptcp.c | 8 ++++++--
>  1 file changed, 6 insertions(+), 2 deletions(-)
> 
> diff --git a/tools/testing/selftests/bpf/prog_tests/mptcp.c b/tools/testing/selftests/bpf/prog_tests/mptcp.c
> index 88bef3dff24e..912457da88eb 100644
> --- a/tools/testing/selftests/bpf/prog_tests/mptcp.c
> +++ b/tools/testing/selftests/bpf/prog_tests/mptcp.c
> @@ -385,6 +385,7 @@ static void test_bkup(void)
>  
>  static void test_rr(void)
>  {
> +	struct nstoken *nstoken = NULL;
>  	struct mptcp_bpf_rr *rr_skel;
>  	int server_fd, client_fd;
>  	struct bpf_link *link;
> @@ -399,7 +400,9 @@ static void test_rr(void)
>  		return;
>  	}
>  
> -	sched_init("subflow", "bpf_rr");
> +	nstoken = sched_init("subflow", "bpf_rr");
> +	if (!ASSERT_OK_PTR(nstoken, "sched_init:rr"))

Small detail if you have to send a v4: can you add the "bpf_" prefix
like with the others?

  sched_init:bpf_rr

Cheers,
Matt

> +		goto fail;
>  	server_fd = start_mptcp_server(AF_INET, ADDR_1, 0, 0);
>  	client_fd = connect_to_fd(server_fd, 0);
>  
> @@ -409,7 +412,8 @@ static void test_rr(void)
>  
>  	close(client_fd);
>  	close(server_fd);
> -	sched_cleanup();
> +fail:
> +	cleanup_netns(nstoken);
>  	bpf_link__destroy(link);
>  	mptcp_bpf_rr__destroy(rr_skel);
>  }

-- 
Tessares | Belgium | Hybrid Access Solutions
www.tessares.net

Re: Squash to "selftests/bpf: Add bpf_red test": Tests Results

[MPTCP CI]

Hi Geliang,

Thank you for your modifications, that's great!

Our CI did some validations and here is its report:

- KVM Validation: normal (except selftest_mptcp_join):
  - Success! ✅:
  - Task: https://cirrus-ci.com/task/5767691659640832
  - Summary: https://api.cirrus-ci.com/v1/artifact/task/5767691659640832/summary/summary.txt

- KVM Validation: debug (except selftest_mptcp_join):
  - Unstable: 3 failed test(s): packetdrill_dss packetdrill_mp_join selftest_diag 🔴:
  - Task: https://cirrus-ci.com/task/6330641613062144
  - Summary: https://api.cirrus-ci.com/v1/artifact/task/6330641613062144/summary/summary.txt

- KVM Validation: debug (only selftest_mptcp_join):
  - Success! ✅:
  - Task: https://cirrus-ci.com/task/4923266729508864
  - Summary: https://api.cirrus-ci.com/v1/artifact/task/4923266729508864/summary/summary.txt

- KVM Validation: normal (only selftest_mptcp_join):
  - Success! ✅:
  - Task: https://cirrus-ci.com/task/5204741706219520
  - Summary: https://api.cirrus-ci.com/v1/artifact/task/5204741706219520/summary/summary.txt

Initiator: Patchew Applier
Commits: https://github.com/multipath-tcp/mptcp_net-next/commits/0c3e05f46646


If there are some issues, you can reproduce them using the same environment as
the one used by the CI thanks to a docker image, e.g.:

    $ cd [kernel source code]
    $ docker run -v "${PWD}:${PWD}:rw" -w "${PWD}" --privileged --rm -it \
        --pull always mptcp/mptcp-upstream-virtme-docker:latest \
        auto-debug

For more details:

    https://github.com/multipath-tcp/mptcp-upstream-virtme-docker


Please note that despite all the efforts that have been already done to have a
stable tests suite when executed on a public CI like here, it is possible some
reported issues are not due to your modifications. Still, do not hesitate to
help us improve that ;-)

Cheers,
MPTCP GH Action bot
Bot operated by Matthieu Baerts (Tessares)

[PATCH mptcp-next v3 1/6] selftests/bpf: add two mptcp netns helpers

[Geliang Tang]

Add two netns helpers for mptcp tests: create_netns() and
cleanup_netns(). Use them in test_base().

Signed-off-by: Geliang Tang <geliang.tang@suse.com>
---
 .../testing/selftests/bpf/prog_tests/mptcp.c  | 29 +++++++++++++------
 1 file changed, 20 insertions(+), 9 deletions(-)

diff --git a/tools/testing/selftests/bpf/prog_tests/mptcp.c b/tools/testing/selftests/bpf/prog_tests/mptcp.c
index de8b6c68fc30..d008388554de 100644
--- a/tools/testing/selftests/bpf/prog_tests/mptcp.c
+++ b/tools/testing/selftests/bpf/prog_tests/mptcp.c
@@ -142,6 +142,23 @@ static int run_test(int cgroup_fd, int server_fd, bool is_mptcp)
 	return err;
 }
 
+static struct nstoken *create_netns(void)
+{
+	SYS(fail, "ip netns add %s", NS_TEST);
+	SYS(fail, "ip -net %s link set dev lo up", NS_TEST);
+
+fail:
+	return open_netns(NS_TEST);
+}
+
+static void cleanup_netns(struct nstoken *nstoken)
+{
+	if (nstoken)
+		close_netns(nstoken);
+
+	SYS_NOFAIL("ip netns del %s &> /dev/null", NS_TEST);
+}
+
 static void test_base(void)
 {
 	struct nstoken *nstoken = NULL;
@@ -151,11 +168,8 @@ static void test_base(void)
 	if (!ASSERT_GE(cgroup_fd, 0, "test__join_cgroup"))
 		return;
 
-	SYS(fail, "ip netns add %s", NS_TEST);
-	SYS(fail, "ip -net %s link set dev lo up", NS_TEST);
-
-	nstoken = open_netns(NS_TEST);
-	if (!ASSERT_OK_PTR(nstoken, "open_netns"))
+	nstoken = create_netns();
+	if (!ASSERT_OK_PTR(nstoken, "create_netns"))
 		goto fail;
 
 	/* without MPTCP */
@@ -178,10 +192,7 @@ static void test_base(void)
 	close(server_fd);
 
 fail:
-	if (nstoken)
-		close_netns(nstoken);
-
-	SYS_NOFAIL("ip netns del " NS_TEST " &> /dev/null");
+	cleanup_netns(nstoken);
 
 	close(cgroup_fd);
 }
-- 
2.35.3

[PATCH mptcp-next v3 2/6] selftests/bpf: use random netns name for mptcp

[Geliang Tang]

Use rand() to generate a random netns name instead of using the fixed
name "mptcp_ns" for every test.

Signed-off-by: Geliang Tang <geliang.tang@suse.com>
---
 tools/testing/selftests/bpf/prog_tests/mptcp.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/tools/testing/selftests/bpf/prog_tests/mptcp.c b/tools/testing/selftests/bpf/prog_tests/mptcp.c
index d008388554de..ca348bab0afe 100644
--- a/tools/testing/selftests/bpf/prog_tests/mptcp.c
+++ b/tools/testing/selftests/bpf/prog_tests/mptcp.c
@@ -11,7 +11,7 @@
 #include "mptcp_bpf_rr.skel.h"
 #include "mptcp_bpf_red.skel.h"
 
-#define NS_TEST "mptcp_ns"
+char NS_TEST[32];
 
 #ifndef TCP_CA_NAME_MAX
 #define TCP_CA_NAME_MAX	16
@@ -144,6 +144,8 @@ static int run_test(int cgroup_fd, int server_fd, bool is_mptcp)
 
 static struct nstoken *create_netns(void)
 {
+	srand(time(NULL));
+	snprintf(NS_TEST, sizeof(NS_TEST), "mptcp_ns_%d", rand());
 	SYS(fail, "ip netns add %s", NS_TEST);
 	SYS(fail, "ip -net %s link set dev lo up", NS_TEST);
 
-- 
2.35.3