| lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
|
Open Source and information security mailing list archives
| ||
|
Message-Id: <20170421145612.106869-4-willemdebruijn.kernel@gmail.com>
Date: Fri, 21 Apr 2017 10:56:12 -0400
From: Willem de Bruijn <willemdebruijn.kernel@...il.com>
To: netdev@...r.kernel.org
Cc: maloneykernel@...il.com, davem@...emloft.net,
Mike Maloney <maloney@...gle.com>
Subject: [PATCH net-next 3/3] selftests/net: add tests for PACKET_FANOUT_FLAG_UNIQUEID
From: Mike Maloney <maloney@...gle.com>
Create two groups with PACKET_FANOUT_FLAG_UNIQUEID, add a socket to one.
Ensure that the groups can only be joined if all options are consistent
with the original except for this flag.
Signed-off-by: Mike Maloney <maloney@...gle.com>
Acked-by: Willem de Bruijn <willemb@...gle.com>
---
tools/testing/selftests/net/psock_fanout.c | 95 ++++++++++++++++++++++++++----
1 file changed, 84 insertions(+), 11 deletions(-)
diff --git a/tools/testing/selftests/net/psock_fanout.c b/tools/testing/selftests/net/psock_fanout.c
index b475d87d3aa3..1c46a21a9b5e 100644
--- a/tools/testing/selftests/net/psock_fanout.c
+++ b/tools/testing/selftests/net/psock_fanout.c
@@ -71,7 +71,7 @@
/* Open a socket in a given fanout mode.
* @return -1 if mode is bad, a valid socket otherwise */
-static int sock_fanout_open(uint16_t typeflags)
+static int sock_fanout_open(uint16_t typeflags, uint16_t group_id)
{
int fd, val;
@@ -81,8 +81,7 @@ static int sock_fanout_open(uint16_t typeflags)
exit(1);
}
- /* fanout group ID is always 0: tests whether old groups are deleted */
- val = ((int) typeflags) << 16;
+ val = (((int) typeflags) << 16) | group_id;
if (setsockopt(fd, SOL_PACKET, PACKET_FANOUT, &val, sizeof(val))) {
if (close(fd)) {
perror("close packet");
@@ -95,6 +94,20 @@ static int sock_fanout_open(uint16_t typeflags)
return fd;
}
+static void sock_fanout_getopts(int fd, uint16_t *typeflags, uint16_t *group_id)
+{
+ int sockopt;
+ socklen_t sockopt_len = sizeof(sockopt);
+
+ if (getsockopt(fd, SOL_PACKET, PACKET_FANOUT,
+ &sockopt, &sockopt_len)) {
+ perror("failed to getsockopt");
+ exit(1);
+ }
+ *typeflags = sockopt >> 16;
+ *group_id = sockopt & 0xfffff;
+}
+
static void sock_fanout_set_ebpf(int fd)
{
const int len_off = __builtin_offsetof(struct __sk_buff, len);
@@ -210,7 +223,7 @@ static void test_control_single(void)
fprintf(stderr, "test: control single socket\n");
if (sock_fanout_open(PACKET_FANOUT_ROLLOVER |
- PACKET_FANOUT_FLAG_ROLLOVER) != -1) {
+ PACKET_FANOUT_FLAG_ROLLOVER, 0) != -1) {
fprintf(stderr, "ERROR: opened socket with dual rollover\n");
exit(1);
}
@@ -223,26 +236,26 @@ static void test_control_group(void)
fprintf(stderr, "test: control multiple sockets\n");
- fds[0] = sock_fanout_open(PACKET_FANOUT_HASH);
+ fds[0] = sock_fanout_open(PACKET_FANOUT_HASH, 0);
if (fds[0] == -1) {
fprintf(stderr, "ERROR: failed to open HASH socket\n");
exit(1);
}
if (sock_fanout_open(PACKET_FANOUT_HASH |
- PACKET_FANOUT_FLAG_DEFRAG) != -1) {
+ PACKET_FANOUT_FLAG_DEFRAG, 0) != -1) {
fprintf(stderr, "ERROR: joined group with wrong flag defrag\n");
exit(1);
}
if (sock_fanout_open(PACKET_FANOUT_HASH |
- PACKET_FANOUT_FLAG_ROLLOVER) != -1) {
+ PACKET_FANOUT_FLAG_ROLLOVER, 0) != -1) {
fprintf(stderr, "ERROR: joined group with wrong flag ro\n");
exit(1);
}
- if (sock_fanout_open(PACKET_FANOUT_CPU) != -1) {
+ if (sock_fanout_open(PACKET_FANOUT_CPU, 0) != -1) {
fprintf(stderr, "ERROR: joined group with wrong mode\n");
exit(1);
}
- fds[1] = sock_fanout_open(PACKET_FANOUT_HASH);
+ fds[1] = sock_fanout_open(PACKET_FANOUT_HASH, 0);
if (fds[1] == -1) {
fprintf(stderr, "ERROR: failed to join group\n");
exit(1);
@@ -253,6 +266,61 @@ static void test_control_group(void)
}
}
+/* Test creating a unique fanout group ids */
+static void test_unique_fanout_group_ids(void)
+{
+ int fds[3];
+ uint16_t typeflags, first_group_id, second_group_id;
+
+ fprintf(stderr, "test: unique ids\n");
+
+ fds[0] = sock_fanout_open(PACKET_FANOUT_HASH |
+ PACKET_FANOUT_FLAG_UNIQUEID, 0);
+ if (fds[0] == -1) {
+ fprintf(stderr, "ERROR: failed to create a unique id group.\n");
+ exit(1);
+ }
+
+ sock_fanout_getopts(fds[0], &typeflags, &first_group_id);
+ if (typeflags != PACKET_FANOUT_HASH) {
+ fprintf(stderr, "ERROR: unexpected typeflags %x\n", typeflags);
+ exit(1);
+ }
+
+ if (sock_fanout_open(PACKET_FANOUT_CPU, first_group_id)) {
+ fprintf(stderr, "ERROR: joined group with wrong type.\n");
+ exit(1);
+ }
+
+ fds[1] = sock_fanout_open(PACKET_FANOUT_HASH, first_group_id);
+ if (fds[1] == -1) {
+ fprintf(stderr,
+ "ERROR: failed to join previously created group.\n");
+ exit(1);
+ }
+
+ fds[2] = sock_fanout_open(PACKET_FANOUT_HASH |
+ PACKET_FANOUT_FLAG_UNIQUEID, 0);
+ if (fds[2] == -1) {
+ fprintf(stderr,
+ "ERROR: failed to create a second unique id group.\n");
+ exit(1);
+ }
+
+ sock_fanout_getopts(fds[2], &typeflags, &second_group_id);
+ if (sock_fanout_open(PACKET_FANOUT_HASH | PACKET_FANOUT_FLAG_UNIQUEID,
+ second_group_id) != -1) {
+ fprintf(stderr,
+ "ERROR: specified a group id when requesting unique id\n");
+ exit(1);
+ }
+
+ if (close(fds[0]) || close(fds[1]) || close(fds[2])) {
+ fprintf(stderr, "ERROR: closing sockets\n");
+ exit(1);
+ }
+}
+
static int test_datapath(uint16_t typeflags, int port_off,
const int expect1[], const int expect2[])
{
@@ -263,8 +331,8 @@ static int test_datapath(uint16_t typeflags, int port_off,
fprintf(stderr, "test: datapath 0x%hx\n", typeflags);
- fds[0] = sock_fanout_open(typeflags);
- fds[1] = sock_fanout_open(typeflags);
+ fds[0] = sock_fanout_open(typeflags, 0);
+ fds[1] = sock_fanout_open(typeflags, 0);
if (fds[0] == -1 || fds[1] == -1) {
fprintf(stderr, "ERROR: failed open\n");
exit(1);
@@ -331,10 +399,12 @@ int main(int argc, char **argv)
const int expect_cpu0[2][2] = { { 20, 0 }, { 20, 0 } };
const int expect_cpu1[2][2] = { { 0, 20 }, { 0, 20 } };
const int expect_bpf[2][2] = { { 15, 5 }, { 15, 20 } };
+ const int expect_uniqueid[2][2] = { { 20, 20}, { 20, 20 } };
int port_off = 2, tries = 5, ret;
test_control_single();
test_control_group();
+ test_unique_fanout_group_ids();
/* find a set of ports that do not collide onto the same socket */
ret = test_datapath(PACKET_FANOUT_HASH, port_off,
@@ -365,6 +435,9 @@ int main(int argc, char **argv)
ret |= test_datapath(PACKET_FANOUT_CPU, port_off,
expect_cpu1[0], expect_cpu1[1]);
+ ret |= test_datapath(PACKET_FANOUT_FLAG_UNIQUEID, port_off,
+ expect_uniqueid[0], expect_uniqueid[1]);
+
if (ret)
return 1;
--
2.12.2.816.g2cccc81164-goog
Powered by blists - more mailing lists