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Message-Id: <20230925102249.1847195-5-tushar.vyavahare@intel.com>
Date: Mon, 25 Sep 2023 15:52:45 +0530
From: Tushar Vyavahare <tushar.vyavahare@...el.com>
To: bpf@...r.kernel.org
Cc: netdev@...r.kernel.org,
bjorn@...nel.org,
magnus.karlsson@...el.com,
maciej.fijalkowski@...el.com,
jonathan.lemon@...il.com,
davem@...emloft.net,
kuba@...nel.org,
pabeni@...hat.com,
ast@...nel.org,
daniel@...earbox.net,
tirthendu.sarkar@...el.com,
tushar.vyavahare@...el.com
Subject: [PATCH bpf-next v2 4/8] selftests/xsk: iterate over all the sockets in the receive pkts function
Improve the receive_pkt() function to enable it to receive packets from
multiple sockets. Define a sock_num variable to iterate through all the
sockets in the Rx path. Add nb_valid_entries to check that all the
expected number of packets are received.
Revise the function __receive_pkts() to only inspect the receive ring
once, handle any received packets, and promptly return. Implement a bitmap
to store the value of number of sockets. Update Makefile to include
find_bit.c for compiling xskxceiver.
Signed-off-by: Tushar Vyavahare <tushar.vyavahare@...el.com>
---
tools/testing/selftests/bpf/Makefile | 4 +-
tools/testing/selftests/bpf/xskxceiver.c | 285 ++++++++++++++---------
tools/testing/selftests/bpf/xskxceiver.h | 2 +
3 files changed, 178 insertions(+), 113 deletions(-)
diff --git a/tools/testing/selftests/bpf/Makefile b/tools/testing/selftests/bpf/Makefile
index caede9b574cb..b9a30ff99208 100644
--- a/tools/testing/selftests/bpf/Makefile
+++ b/tools/testing/selftests/bpf/Makefile
@@ -640,7 +640,9 @@ $(OUTPUT)/test_verifier: test_verifier.c verifier/tests.h $(BPFOBJ) | $(OUTPUT)
$(call msg,BINARY,,$@)
$(Q)$(CC) $(CFLAGS) $(filter %.a %.o %.c,$^) $(LDLIBS) -o $@
-$(OUTPUT)/xskxceiver: xskxceiver.c xskxceiver.h $(OUTPUT)/xsk.o $(OUTPUT)/xsk_xdp_progs.skel.h $(BPFOBJ) | $(OUTPUT)
+# Include find_bit.c to compile xskxceiver.
+EXTRA_SRC := $(TOOLSDIR)/lib/find_bit.c
+$(OUTPUT)/xskxceiver: $(EXTRA_SRC) xskxceiver.c xskxceiver.h $(OUTPUT)/xsk.o $(OUTPUT)/xsk_xdp_progs.skel.h $(BPFOBJ) | $(OUTPUT)
$(call msg,BINARY,,$@)
$(Q)$(CC) $(CFLAGS) $(filter %.a %.o %.c,$^) $(LDLIBS) -o $@
diff --git a/tools/testing/selftests/bpf/xskxceiver.c b/tools/testing/selftests/bpf/xskxceiver.c
index e26f942a7b9e..627c68f047e0 100644
--- a/tools/testing/selftests/bpf/xskxceiver.c
+++ b/tools/testing/selftests/bpf/xskxceiver.c
@@ -80,6 +80,7 @@
#include <linux/if_ether.h>
#include <linux/mman.h>
#include <linux/netdev.h>
+#include <linux/bitmap.h>
#include <arpa/inet.h>
#include <net/if.h>
#include <locale.h>
@@ -530,8 +531,10 @@ static int test_spec_set_mtu(struct test_spec *test, int mtu)
static void pkt_stream_reset(struct pkt_stream *pkt_stream)
{
- if (pkt_stream)
+ if (pkt_stream) {
pkt_stream->current_pkt_nb = 0;
+ pkt_stream->nb_rx_pkts = 0;
+ }
}
static struct pkt *pkt_stream_get_next_tx_pkt(struct pkt_stream *pkt_stream)
@@ -631,14 +634,16 @@ static u32 pkt_nb_frags(u32 frame_size, struct pkt_stream *pkt_stream, struct pk
return nb_frags;
}
-static void pkt_set(struct xsk_umem_info *umem, struct pkt *pkt, int offset, u32 len)
+static void pkt_set(struct pkt_stream *pkt_stream, struct pkt *pkt, int offset, u32 len)
{
pkt->offset = offset;
pkt->len = len;
- if (len > MAX_ETH_JUMBO_SIZE)
+ if (len > MAX_ETH_JUMBO_SIZE) {
pkt->valid = false;
- else
+ } else {
pkt->valid = true;
+ pkt_stream->nb_valid_entries++;
+ }
}
static u32 pkt_get_buffer_len(struct xsk_umem_info *umem, u32 len)
@@ -660,7 +665,7 @@ static struct pkt_stream *pkt_stream_generate(struct xsk_umem_info *umem, u32 nb
for (i = 0; i < nb_pkts; i++) {
struct pkt *pkt = &pkt_stream->pkts[i];
- pkt_set(umem, pkt, 0, pkt_len);
+ pkt_set(pkt_stream, pkt, 0, pkt_len);
pkt->pkt_nb = i;
}
@@ -692,9 +697,10 @@ static void __pkt_stream_replace_half(struct ifobject *ifobj, u32 pkt_len,
pkt_stream = pkt_stream_clone(umem, ifobj->xsk->pkt_stream);
for (i = 1; i < ifobj->xsk->pkt_stream->nb_pkts; i += 2)
- pkt_set(umem, &pkt_stream->pkts[i], offset, pkt_len);
+ pkt_set(pkt_stream, &pkt_stream->pkts[i], offset, pkt_len);
ifobj->xsk->pkt_stream = pkt_stream;
+ pkt_stream->nb_valid_entries /= 2;
}
static void pkt_stream_replace_half(struct test_spec *test, u32 pkt_len, int offset)
@@ -714,6 +720,8 @@ static void pkt_stream_receive_half(struct test_spec *test)
pkt_stream = test->ifobj_rx->xsk->pkt_stream;
for (i = 1; i < pkt_stream->nb_pkts; i += 2)
pkt_stream->pkts[i].valid = false;
+
+ pkt_stream->nb_valid_entries /= 2;
}
static u64 pkt_get_addr(struct pkt *pkt, struct xsk_umem_info *umem)
@@ -787,6 +795,10 @@ static struct pkt_stream *__pkt_stream_generate_custom(struct ifobject *ifobj, s
if (pkt->valid && pkt->len > pkt_stream->max_pkt_len)
pkt_stream->max_pkt_len = pkt->len;
+
+ if (pkt->valid)
+ pkt_stream->nb_valid_entries++;
+
pkt_nb++;
}
@@ -1008,133 +1020,178 @@ static int complete_pkts(struct xsk_socket_info *xsk, int batch_size)
return TEST_PASS;
}
-static int receive_pkts(struct test_spec *test, struct pollfd *fds)
+static int __receive_pkts(struct test_spec *test, struct xsk_socket_info *xsk)
{
- struct timeval tv_end, tv_now, tv_timeout = {THREAD_TMOUT, 0};
- struct pkt_stream *pkt_stream = test->ifobj_rx->xsk->pkt_stream;
- struct xsk_socket_info *xsk = test->ifobj_rx->xsk;
+ u32 frags_processed = 0, nb_frags = 0, pkt_len = 0;
u32 idx_rx = 0, idx_fq = 0, rcvd, pkts_sent = 0;
+ struct pkt_stream *pkt_stream = xsk->pkt_stream;
struct ifobject *ifobj = test->ifobj_rx;
struct xsk_umem_info *umem = xsk->umem;
+ struct pollfd fds = { };
struct pkt *pkt;
+ u64 first_addr;
int ret;
- ret = gettimeofday(&tv_now, NULL);
- if (ret)
- exit_with_error(errno);
- timeradd(&tv_now, &tv_timeout, &tv_end);
-
- pkt = pkt_stream_get_next_rx_pkt(pkt_stream, &pkts_sent);
- while (pkt) {
- u32 frags_processed = 0, nb_frags = 0, pkt_len = 0;
- u64 first_addr;
+ fds.fd = xsk_socket__fd(xsk->xsk);
+ fds.events = POLLIN;
- ret = gettimeofday(&tv_now, NULL);
- if (ret)
- exit_with_error(errno);
- if (timercmp(&tv_now, &tv_end, >)) {
- ksft_print_msg("ERROR: [%s] Receive loop timed out\n", __func__);
- return TEST_FAILURE;
- }
+ ret = kick_rx(xsk);
+ if (ret)
+ return TEST_FAILURE;
- ret = kick_rx(xsk);
- if (ret)
+ if (ifobj->use_poll) {
+ ret = poll(&fds, 1, POLL_TMOUT);
+ if (ret < 0)
return TEST_FAILURE;
- if (ifobj->use_poll) {
- ret = poll(fds, 1, POLL_TMOUT);
- if (ret < 0)
- return TEST_FAILURE;
-
- if (!ret) {
- if (!is_umem_valid(test->ifobj_tx))
- return TEST_PASS;
-
- ksft_print_msg("ERROR: [%s] Poll timed out\n", __func__);
- return TEST_FAILURE;
- }
+ if (!ret) {
+ if (!is_umem_valid(test->ifobj_tx))
+ return TEST_PASS;
- if (!(fds->revents & POLLIN))
- continue;
+ ksft_print_msg("ERROR: [%s] Poll timed out\n", __func__);
+ return TEST_CONTINUE;
}
- rcvd = xsk_ring_cons__peek(&xsk->rx, BATCH_SIZE, &idx_rx);
- if (!rcvd)
- continue;
+ if (!(fds.revents & POLLIN))
+ return TEST_CONTINUE;
+ }
- if (ifobj->use_fill_ring) {
- ret = xsk_ring_prod__reserve(&umem->fq, rcvd, &idx_fq);
- while (ret != rcvd) {
- if (xsk_ring_prod__needs_wakeup(&umem->fq)) {
- ret = poll(fds, 1, POLL_TMOUT);
- if (ret < 0)
- return TEST_FAILURE;
- }
- ret = xsk_ring_prod__reserve(&umem->fq, rcvd, &idx_fq);
+ rcvd = xsk_ring_cons__peek(&xsk->rx, BATCH_SIZE, &idx_rx);
+ if (!rcvd)
+ return TEST_CONTINUE;
+
+ if (ifobj->use_fill_ring) {
+ ret = xsk_ring_prod__reserve(&umem->fq, rcvd, &idx_fq);
+ while (ret != rcvd) {
+ if (xsk_ring_prod__needs_wakeup(&umem->fq)) {
+ ret = poll(&fds, 1, POLL_TMOUT);
+ if (ret < 0)
+ return TEST_FAILURE;
}
+ ret = xsk_ring_prod__reserve(&umem->fq, rcvd, &idx_fq);
}
+ }
- while (frags_processed < rcvd) {
- const struct xdp_desc *desc = xsk_ring_cons__rx_desc(&xsk->rx, idx_rx++);
- u64 addr = desc->addr, orig;
+ while (frags_processed < rcvd) {
+ const struct xdp_desc *desc = xsk_ring_cons__rx_desc(&xsk->rx, idx_rx++);
+ u64 addr = desc->addr, orig;
- orig = xsk_umem__extract_addr(addr);
- addr = xsk_umem__add_offset_to_addr(addr);
+ orig = xsk_umem__extract_addr(addr);
+ addr = xsk_umem__add_offset_to_addr(addr);
+ if (!nb_frags) {
+ pkt = pkt_stream_get_next_rx_pkt(pkt_stream, &pkts_sent);
if (!pkt) {
ksft_print_msg("[%s] received too many packets addr: %lx len %u\n",
__func__, addr, desc->len);
return TEST_FAILURE;
}
+ }
- print_verbose("Rx: addr: %lx len: %u options: %u pkt_nb: %u valid: %u\n",
- addr, desc->len, desc->options, pkt->pkt_nb, pkt->valid);
+ print_verbose("Rx: addr: %lx len: %u options: %u pkt_nb: %u valid: %u\n",
+ addr, desc->len, desc->options, pkt->pkt_nb, pkt->valid);
- if (!is_frag_valid(umem, addr, desc->len, pkt->pkt_nb, pkt_len) ||
- !is_offset_correct(umem, pkt, addr) ||
- (ifobj->use_metadata && !is_metadata_correct(pkt, umem->buffer, addr)))
- return TEST_FAILURE;
+ if (!is_frag_valid(umem, addr, desc->len, pkt->pkt_nb, pkt_len) ||
+ !is_offset_correct(umem, pkt, addr) || (ifobj->use_metadata &&
+ !is_metadata_correct(pkt, umem->buffer, addr)))
+ return TEST_FAILURE;
- if (!nb_frags++)
- first_addr = addr;
- frags_processed++;
- pkt_len += desc->len;
- if (ifobj->use_fill_ring)
- *xsk_ring_prod__fill_addr(&umem->fq, idx_fq++) = orig;
+ if (!nb_frags++)
+ first_addr = addr;
+ frags_processed++;
+ pkt_len += desc->len;
+ if (ifobj->use_fill_ring)
+ *xsk_ring_prod__fill_addr(&umem->fq, idx_fq++) = orig;
- if (pkt_continues(desc->options))
- continue;
+ if (pkt_continues(desc->options))
+ continue;
- /* The complete packet has been received */
- if (!is_pkt_valid(pkt, umem->buffer, first_addr, pkt_len) ||
- !is_offset_correct(umem, pkt, addr))
- return TEST_FAILURE;
+ /* The complete packet has been received */
+ if (!is_pkt_valid(pkt, umem->buffer, first_addr, pkt_len) ||
+ !is_offset_correct(umem, pkt, addr))
+ return TEST_FAILURE;
- pkt = pkt_stream_get_next_rx_pkt(pkt_stream, &pkts_sent);
- nb_frags = 0;
- pkt_len = 0;
- }
+ pkt_stream->nb_rx_pkts++;
+ nb_frags = 0;
+ pkt_len = 0;
+ }
- if (nb_frags) {
- /* In the middle of a packet. Start over from beginning of packet. */
- idx_rx -= nb_frags;
- xsk_ring_cons__cancel(&xsk->rx, nb_frags);
- if (ifobj->use_fill_ring) {
- idx_fq -= nb_frags;
- xsk_ring_prod__cancel(&umem->fq, nb_frags);
- }
- frags_processed -= nb_frags;
+ if (nb_frags) {
+ /* In the middle of a packet. Start over from beginning of packet. */
+ idx_rx -= nb_frags;
+ xsk_ring_cons__cancel(&xsk->rx, nb_frags);
+ if (ifobj->use_fill_ring) {
+ idx_fq -= nb_frags;
+ xsk_ring_prod__cancel(&umem->fq, nb_frags);
}
+ frags_processed -= nb_frags;
+ }
- if (ifobj->use_fill_ring)
- xsk_ring_prod__submit(&umem->fq, frags_processed);
- if (ifobj->release_rx)
- xsk_ring_cons__release(&xsk->rx, frags_processed);
+ if (ifobj->use_fill_ring)
+ xsk_ring_prod__submit(&umem->fq, frags_processed);
+ if (ifobj->release_rx)
+ xsk_ring_cons__release(&xsk->rx, frags_processed);
+
+ pthread_mutex_lock(&pacing_mutex);
+ pkts_in_flight -= pkts_sent;
+ pthread_mutex_unlock(&pacing_mutex);
+ pkts_sent = 0;
+
+return TEST_CONTINUE;
+}
+
+bool all_packets_received(struct test_spec *test, struct xsk_socket_info *xsk, u32 sock_num,
+ unsigned long *bitmap)
+{
+ struct pkt_stream *pkt_stream = xsk->pkt_stream;
+
+ if (!pkt_stream) {
+ __set_bit(sock_num, bitmap);
+ return false;
+ }
+
+ if (pkt_stream->nb_rx_pkts == pkt_stream->nb_valid_entries) {
+ __set_bit(sock_num, bitmap);
+ if (bitmap_full(bitmap, test->nb_sockets))
+ return true;
+ }
+
+ return false;
+}
+
+static int receive_pkts(struct test_spec *test)
+{
+ struct timeval tv_end, tv_now, tv_timeout = {THREAD_TMOUT, 0};
+ DECLARE_BITMAP(bitmap, test->nb_sockets);
+ u32 sock_num = 0;
+ int res, ret;
+
+ ret = gettimeofday(&tv_now, NULL);
+ if (ret)
+ exit_with_error(errno);
+
+ timeradd(&tv_now, &tv_timeout, &tv_end);
+
+ while (1) {
+ sock_num = (sock_num + 1) % test->nb_sockets;
+
+ struct xsk_socket_info *xsk = &test->ifobj_rx->xsk_arr[sock_num];
+
+ if ((all_packets_received(test, xsk, sock_num, bitmap)))
+ break;
+
+ res = __receive_pkts(test, xsk);
+ if (!(res == TEST_PASS || res == TEST_CONTINUE))
+ return res;
+
+ ret = gettimeofday(&tv_now, NULL);
+ if (ret)
+ exit_with_error(errno);
- pthread_mutex_lock(&pacing_mutex);
- pkts_in_flight -= pkts_sent;
- pthread_mutex_unlock(&pacing_mutex);
- pkts_sent = 0;
+ if (timercmp(&tv_now, &tv_end, >)) {
+ ksft_print_msg("ERROR: [%s] Receive loop timed out\n", __func__);
+ return TEST_FAILURE;
+ }
}
return TEST_PASS;
@@ -1567,7 +1624,6 @@ static void *worker_testapp_validate_rx(void *arg)
{
struct test_spec *test = (struct test_spec *)arg;
struct ifobject *ifobject = test->ifobj_rx;
- struct pollfd fds = { };
int err;
if (test->current_step == 1) {
@@ -1582,12 +1638,9 @@ static void *worker_testapp_validate_rx(void *arg)
}
}
- fds.fd = xsk_socket__fd(ifobject->xsk->xsk);
- fds.events = POLLIN;
-
pthread_barrier_wait(&barr);
- err = receive_pkts(test, &fds);
+ err = receive_pkts(test);
if (!err && ifobject->validation_func)
err = ifobject->validation_func(ifobject);
@@ -1724,9 +1777,15 @@ static int __testapp_validate_traffic(struct test_spec *test, struct ifobject *i
pthread_join(t0, NULL);
if (test->total_steps == test->current_step || test->fail) {
+ u32 i;
+
if (ifobj2)
- xsk_socket__delete(ifobj2->xsk->xsk);
- xsk_socket__delete(ifobj1->xsk->xsk);
+ for (i = 0; i < test->nb_sockets; i++)
+ xsk_socket__delete(ifobj2->xsk_arr[i].xsk);
+
+ for (i = 0; i < test->nb_sockets; i++)
+ xsk_socket__delete(ifobj1->xsk_arr[i].xsk);
+
testapp_clean_xsk_umem(ifobj1);
if (ifobj2 && !ifobj2->shared_umem)
testapp_clean_xsk_umem(ifobj2);
@@ -1798,16 +1857,18 @@ static int testapp_bidirectional(struct test_spec *test)
return res;
}
-static int swap_xsk_resources(struct ifobject *ifobj_tx, struct ifobject *ifobj_rx)
+static int swap_xsk_resources(struct test_spec *test)
{
int ret;
- xsk_socket__delete(ifobj_tx->xsk->xsk);
- xsk_socket__delete(ifobj_rx->xsk->xsk);
- ifobj_tx->xsk = &ifobj_tx->xsk_arr[1];
- ifobj_rx->xsk = &ifobj_rx->xsk_arr[1];
+ test->ifobj_tx->xsk_arr[0].pkt_stream = NULL;
+ test->ifobj_rx->xsk_arr[0].pkt_stream = NULL;
+ test->ifobj_tx->xsk_arr[1].pkt_stream = test->tx_pkt_stream_default;
+ test->ifobj_rx->xsk_arr[1].pkt_stream = test->rx_pkt_stream_default;
+ test->ifobj_tx->xsk = &test->ifobj_tx->xsk_arr[1];
+ test->ifobj_rx->xsk = &test->ifobj_rx->xsk_arr[1];
- ret = xsk_update_xskmap(ifobj_rx->xskmap, ifobj_rx->xsk->xsk);
+ ret = xsk_update_xskmap(test->ifobj_rx->xskmap, test->ifobj_rx->xsk->xsk);
if (ret)
return TEST_FAILURE;
@@ -1821,7 +1882,7 @@ static int testapp_xdp_prog_cleanup(struct test_spec *test)
if (testapp_validate_traffic(test))
return TEST_FAILURE;
- if (swap_xsk_resources(test->ifobj_tx, test->ifobj_rx))
+ if (swap_xsk_resources(test))
return TEST_FAILURE;
return testapp_validate_traffic(test);
}
diff --git a/tools/testing/selftests/bpf/xskxceiver.h b/tools/testing/selftests/bpf/xskxceiver.h
index 3d494adef792..fa409285eafd 100644
--- a/tools/testing/selftests/bpf/xskxceiver.h
+++ b/tools/testing/selftests/bpf/xskxceiver.h
@@ -108,6 +108,8 @@ struct pkt_stream {
u32 current_pkt_nb;
struct pkt *pkts;
u32 max_pkt_len;
+ u32 nb_rx_pkts;
+ u32 nb_valid_entries;
bool verbatim;
};
--
2.34.1
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