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selftests/bpf: Xsk selftests - DRV POLL, NOPOLL

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Adds following tests:

2. AF_XDP DRV/Native mode
   Works on any netdevice with XDP_REDIRECT support, driver dependent.
   Processes packets before SKB allocation. Provides better performance
   than SKB. Driver hook available just after DMA of buffer descriptor.
   a. nopoll
   b. poll
   * Only copy mode is supported because veth does not currently support
     zero-copy mode

Signed-off-by: Weqaar Janjua <weqaar.a.janjua@intel.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Tested-by: Yonghong Song <yhs@fb.com>
Acked-by: Björn Töpel <bjorn.topel@intel.com>
Link: https://lore.kernel.org/bpf/20201207215333.11586-4-weqaar.a.janjua@intel.com
This commit is contained in:
Weqaar Janjua 2020-12-07 21:53:31 +00:00 committed by Daniel Borkmann
parent facb7cb2e9
commit 9103a8594d
3 changed files with 45 additions and 4 deletions
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24
tools/testing/selftests/bpf/test_xsk.sh
View File

@ -173,6 +173,30 @@ retval=$?
test_status $retval "${TEST_NAME}"
statusList+=($retval)
### TEST 4
TEST_NAME="DRV NOPOLL"
vethXDPnative ${VETH0} ${VETH1} ${NS1}
params=("-N")
execxdpxceiver params
retval=$?
test_status $retval "${TEST_NAME}"
statusList+=($retval)
### TEST 5
TEST_NAME="DRV POLL"
vethXDPnative ${VETH0} ${VETH1} ${NS1}
params=("-N" "-p")
execxdpxceiver params
retval=$?
test_status $retval "${TEST_NAME}"
statusList+=($retval)
## END TESTS
cleanup_exit ${VETH0} ${VETH1} ${NS1}

22
tools/testing/selftests/bpf/xdpxceiver.c
View File

@ -27,7 +27,16 @@
* a. nopoll - soft-irq processing
* b. poll - using poll() syscall
*
* Total tests: 2
* 2. AF_XDP DRV/Native mode
* Works on any netdevice with XDP_REDIRECT support, driver dependent. Processes
* packets before SKB allocation. Provides better performance than SKB. Driver
* hook available just after DMA of buffer descriptor.
* a. nopoll
* b. poll
* - Only copy mode is supported because veth does not currently support
* zero-copy mode
*
* Total tests: 4
*
* Flow:
* -----
@ -88,7 +97,7 @@ static void __exit_with_error(int error, const char *file, const char *func, int
#define exit_with_error(error) __exit_with_error(error, __FILE__, __func__, __LINE__)
#define print_ksft_result(void)\
(ksft_test_result_pass("PASS: %s %s\n", uut ? "" : "SKB", opt_poll ? "POLL" : "NOPOLL"))
(ksft_test_result_pass("PASS: %s %s\n", uut ? "DRV" : "SKB", opt_poll ? "POLL" : "NOPOLL"))
static void pthread_init_mutex(void)
{
@ -311,6 +320,7 @@ static struct option long_options[] = {
{"queue", optional_argument, 0, 'q'},
{"poll", no_argument, 0, 'p'},
{"xdp-skb", no_argument, 0, 'S'},
{"xdp-native", no_argument, 0, 'N'},
{"copy", no_argument, 0, 'c'},
{"debug", optional_argument, 0, 'D'},
{"tx-pkt-count", optional_argument, 0, 'C'},
@ -326,6 +336,7 @@ static void usage(const char *prog)
" -q, --queue=n Use queue n (default 0)\n"
" -p, --poll Use poll syscall\n"
" -S, --xdp-skb=n Use XDP SKB mode\n"
" -N, --xdp-native=n Enforce XDP DRV (native) mode\n"
" -c, --copy Force copy mode\n"
" -D, --debug Debug mode - dump packets L2 - L5\n"
" -C, --tx-pkt-count=n Number of packets to send\n";
@ -417,7 +428,7 @@ static void parse_command_line(int argc, char **argv)
opterr = 0;
for (;;) {
c = getopt_long(argc, argv, "i:q:pScDC:", long_options, &option_index);
c = getopt_long(argc, argv, "i:q:pSNcDC:", long_options, &option_index);
if (c == -1)
break;
@ -448,6 +459,11 @@ static void parse_command_line(int argc, char **argv)
opt_xdp_bind_flags |= XDP_COPY;
uut = ORDER_CONTENT_VALIDATE_XDP_SKB;
break;
case 'N':
opt_xdp_flags |= XDP_FLAGS_DRV_MODE;
opt_xdp_bind_flags |= XDP_COPY;
uut = ORDER_CONTENT_VALIDATE_XDP_DRV;
break;
case 'c':
opt_xdp_bind_flags |= XDP_COPY;
break;

3
tools/testing/selftests/bpf/xdpxceiver.h
View File

@ -38,7 +38,7 @@
#define SOCK_RECONF_CTR 10
#define BATCH_SIZE 64
#define POLL_TMOUT 1000
#define NEED_WAKEUP 1
#define NEED_WAKEUP true
typedef __u32 u32;
typedef __u16 u16;
@ -46,6 +46,7 @@ typedef __u8 u8;
enum TESTS {
ORDER_CONTENT_VALIDATE_XDP_SKB = 0,
ORDER_CONTENT_VALIDATE_XDP_DRV = 1,
};
u8 uut;