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selftests: xsk: Implement bpf_link test

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Introduce a test that is supposed to verify the persistence of BPF
resources based on underlying bpf_link usage.

Test will:
1) create and bind two sockets on queue ids 0 and 1
2) run a traffic on queue ids 0
3) remove xsk sockets from queue 0 on both veth interfaces
4) run a traffic on queues ids 1

Running traffic successfully on qids 1 means that BPF resources were
not removed on step 3).

In order to make it work, change the command that creates veth pair to
have the 4 queue pairs by default.

Introduce the arrays of xsks and umems to ifobject struct but keep a
pointers to single entities, so rest of the logic around Rx/Tx can be
kept as-is.

For umem handling, double the size of mmapped space and split that
between the two sockets.

Rename also bidi_pass to a variable 'second_step' of a boolean type as
it's now used also for the test that is introduced here and it doesn't
have anything in common with bi-directional testing.

Drop opt_queue command line argument as it wasn't working before anyway.

Signed-off-by: Maciej Fijalkowski <maciej.fijalkowski@intel.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Link: https://lore.kernel.org/bpf/20210329224316.17793-15-maciej.fijalkowski@intel.com
This commit is contained in:
Maciej Fijalkowski
2021-03-30 00:43:13 +02:00
committed by Alexei Starovoitov
parent 34829eec3b
commit 27e1ca2525
3 changed files with 139 additions and 50 deletions
Download Patch File Download Diff File Expand all files Collapse all files

7
tools/testing/selftests/bpf/xdpxceiver.h
View File

@@ -23,6 +23,7 @@
#define MAX_SOCKS 1
#define MAX_TEARDOWN_ITER 10
#define MAX_BIDI_ITER 2
#define MAX_BPF_ITER 2
#define PKT_HDR_SIZE (sizeof(struct ethhdr) + sizeof(struct iphdr) + \
sizeof(struct udphdr))
#define MIN_PKT_SIZE 64
@@ -63,6 +64,7 @@ enum TEST_TYPES {
TEST_TYPE_TEARDOWN,
TEST_TYPE_BIDI,
TEST_TYPE_STATS,
TEST_TYPE_BPF_RES,
TEST_TYPE_MAX
};
@@ -77,10 +79,9 @@ enum STAT_TEST_TYPES {
static int configured_mode = TEST_MODE_UNCONFIGURED;
static u8 debug_pkt_dump;
static u32 num_frames;
static u8 bidi_pass;
static bool second_step;
static int test_type;
static int opt_queue;
static int opt_pkt_count;
static u8 opt_verbose;
@@ -128,6 +129,8 @@ struct ifobject {
char ifname[MAX_INTERFACE_NAME_CHARS];
char nsname[MAX_INTERFACES_NAMESPACE_CHARS];
struct xsk_socket_info *xsk;
struct xsk_socket_info **xsk_arr;
struct xsk_umem_info **umem_arr;
struct xsk_umem_info *umem;
void *(*func_ptr)(void *arg);
struct flow_vector fv;