[LTP] [PATCH] Fix setsockopt(PACKET_RX_RING) usage on PPC64

[LTP] [PATCH] Fix setsockopt(PACKET_RX_RING) usage on PPC64

[Martin Doucha]

struct tpacket_req3.tp_block_size value must be a multiple of page size.
Replace constants with values calculated from actual page size to fix
setsockopt() tests on PPC64 which has 64KB pages instead of 4KB.

Signed-off-by: Martin Doucha <mdoucha@suse.cz>
---
 testcases/kernel/syscalls/setsockopt/setsockopt06.c | 6 ++++--
 testcases/kernel/syscalls/setsockopt/setsockopt07.c | 6 ++++--
 testcases/kernel/syscalls/setsockopt/setsockopt09.c | 4 +++-
 3 files changed, 11 insertions(+), 5 deletions(-)

diff --git a/testcases/kernel/syscalls/setsockopt/setsockopt06.c b/testcases/kernel/syscalls/setsockopt/setsockopt06.c
index 12a80dee4..644e61f3f 100644
--- a/testcases/kernel/syscalls/setsockopt/setsockopt06.c
+++ b/testcases/kernel/syscalls/setsockopt/setsockopt06.c
@@ -28,6 +28,7 @@
 #include "lapi/if_ether.h"
 
 static int sock = -1;
+static unsigned int pagesize;
 static struct tst_fzsync_pair fzsync_pair;
 
 static void setup(void)
@@ -35,6 +36,7 @@ static void setup(void)
 	int real_uid = getuid();
 	int real_gid = getgid();
 
+	pagesize = SAFE_SYSCONF(_SC_PAGESIZE);
 	SAFE_TRY_FILE_PRINTF("/proc/sys/user/max_user_namespaces", "%d", 10);
 
 	SAFE_UNSHARE(CLONE_NEWUSER);
@@ -52,9 +54,9 @@ static void *thread_run(void *arg)
 {
 	int ret;
 	struct tpacket_req3 req = {
-		.tp_block_size = 4096,
+		.tp_block_size = pagesize,
 		.tp_block_nr = 1,
-		.tp_frame_size = 4096,
+		.tp_frame_size = pagesize,
 		.tp_frame_nr = 1,
 		.tp_retire_blk_tov = 100
 	};
diff --git a/testcases/kernel/syscalls/setsockopt/setsockopt07.c b/testcases/kernel/syscalls/setsockopt/setsockopt07.c
index d2c568e3e..d22f9918b 100644
--- a/testcases/kernel/syscalls/setsockopt/setsockopt07.c
+++ b/testcases/kernel/syscalls/setsockopt/setsockopt07.c
@@ -31,6 +31,7 @@
 #include "lapi/if_ether.h"
 
 static int sock = -1;
+static unsigned int pagesize;
 static struct tst_fzsync_pair fzsync_pair;
 
 static void setup(void)
@@ -38,6 +39,7 @@ static void setup(void)
 	int real_uid = getuid();
 	int real_gid = getgid();
 
+	pagesize = SAFE_SYSCONF(_SC_PAGESIZE);
 	SAFE_TRY_FILE_PRINTF("/proc/sys/user/max_user_namespaces", "%d", 10);
 
 	SAFE_UNSHARE(CLONE_NEWUSER);
@@ -73,9 +75,9 @@ static void run(void)
 	unsigned int val, version = TPACKET_V3;
 	socklen_t vsize = sizeof(val);
 	struct tpacket_req3 req = {
-		.tp_block_size = 4096,
+		.tp_block_size = pagesize,
 		.tp_block_nr = 1,
-		.tp_frame_size = 4096,
+		.tp_frame_size = pagesize,
 		.tp_frame_nr = 1,
 		.tp_retire_blk_tov = 100
 	};
diff --git a/testcases/kernel/syscalls/setsockopt/setsockopt09.c b/testcases/kernel/syscalls/setsockopt/setsockopt09.c
index baaefda15..2fc66ebbc 100644
--- a/testcases/kernel/syscalls/setsockopt/setsockopt09.c
+++ b/testcases/kernel/syscalls/setsockopt/setsockopt09.c
@@ -31,12 +31,14 @@
 #include "lapi/if_packet.h"
 
 static int sock = -1;
+static unsigned int pagesize;
 
 static void setup(void)
 {
 	int real_uid = getuid();
 	int real_gid = getgid();
 
+	pagesize = SAFE_SYSCONF(_SC_PAGESIZE);
 	SAFE_TRY_FILE_PRINTF("/proc/sys/user/max_user_namespaces", "%d", 10);
 
 	SAFE_UNSHARE(CLONE_NEWUSER);
@@ -50,7 +52,7 @@ static void run(void)
 {
 	unsigned int version = TPACKET_V3;
 	struct tpacket_req3 req = {
-		.tp_block_size = 16384,
+		.tp_block_size = 4 * pagesize,
 		.tp_block_nr = 256,
 		.tp_frame_size = TPACKET_ALIGNMENT << 7,
 		.tp_retire_blk_tov = 64,
-- 
2.34.1


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Re: [LTP] [PATCH] Fix setsockopt(PACKET_RX_RING) usage on PPC64

[Petr Vorel]

Hi Martin,

> struct tpacket_req3.tp_block_size value must be a multiple of page size.
> Replace constants with values calculated from actual page size to fix
> setsockopt() tests on PPC64 which has 64KB pages instead of 4KB.

Thanks!
Reviewed-by: Petr Vorel <pvorel@suse.cz>

Before merging this I'll just fix breaking CI (missing libmm-dev in Debian testing).

Kind regards,
Petr

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Re: [LTP] [PATCH] Fix setsockopt(PACKET_RX_RING) usage on PPC64

[Cyril Hrubis]

Hi!
Looks good to me as well.

Reviewed-by: Cyril Hrubis <chrubis@suse.cz>

-- 
Cyril Hrubis
chrubis@suse.cz

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Re: [LTP] [PATCH] Fix setsockopt(PACKET_RX_RING) usage on PPC64

[Petr Vorel]

Hi Martin, Cyril,

> Hi!
> Looks good to me as well.

> Reviewed-by: Cyril Hrubis <chrubis@suse.cz>

Merged. I'm sorry I overlooked your ack.

Kind regards,
Petr

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