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
 
Hash Suite: Windows password security audit tool. GUI, reports in PDF.
[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Message-ID: <158939726542.15176.5964532245173539540.stgit@john-Precision-5820-Tower>
Date:   Wed, 13 May 2020 12:14:25 -0700
From:   John Fastabend <john.fastabend@...il.com>
To:     lmb@...udflare.com, jakub@...udflare.com, daniel@...earbox.net
Cc:     netdev@...r.kernel.org, bpf@...r.kernel.org,
        john.fastabend@...il.com, ast@...nel.org
Subject: [bpf-next PATCH v2 07/12] bpf: selftests,
 improve test_sockmap total bytes counter

The recv thread in test_sockmap waits to receive all bytes from sender but
in the case we use pop data it may wait for more bytes then actually being
sent. This stalls the test harness for multiple seconds. Because this
happens in multiple tests it slows time to run the selftest.

Fix by doing a better job of accounting for total bytes when pop helpers
are used.

Reviewed-by: Jakub Sitnicki <jakub@...udflare.com>
Signed-off-by: John Fastabend <john.fastabend@...il.com>
---
 tools/testing/selftests/bpf/test_sockmap.c |   11 ++++++++---
 1 file changed, 8 insertions(+), 3 deletions(-)

diff --git a/tools/testing/selftests/bpf/test_sockmap.c b/tools/testing/selftests/bpf/test_sockmap.c
index 7f45a8f..9a7e104 100644
--- a/tools/testing/selftests/bpf/test_sockmap.c
+++ b/tools/testing/selftests/bpf/test_sockmap.c
@@ -502,9 +502,10 @@ static int msg_loop(int fd, int iov_count, int iov_length, int cnt,
 		 * paths.
 		 */
 		total_bytes = (float)iov_count * (float)iov_length * (float)cnt;
-		txmsg_pop_total = txmsg_pop;
 		if (txmsg_apply)
-			txmsg_pop_total *= (total_bytes / txmsg_apply);
+			txmsg_pop_total = txmsg_pop * (total_bytes / txmsg_apply);
+		else
+			txmsg_pop_total = txmsg_pop * cnt;
 		total_bytes -= txmsg_pop_total;
 		err = clock_gettime(CLOCK_MONOTONIC, &s->start);
 		if (err < 0)
@@ -638,8 +639,12 @@ static int sendmsg_test(struct sockmap_options *opt)
 
 	rxpid = fork();
 	if (rxpid == 0) {
+		iov_buf -= (txmsg_pop - txmsg_start_pop + 1);
 		if (opt->drop_expected)
-			exit(0);
+			_exit(0);
+
+		if (!iov_buf) /* zero bytes sent case */
+			_exit(0);
 
 		if (opt->sendpage)
 			iov_count = 1;

Powered by blists - more mailing lists

Powered by Openwall GNU/*/Linux Powered by OpenVZ