[PATCH bpf-next v4 0/5] fix test_sockmap

[PATCH bpf-next v4 0/5] fix test_sockmap

[Prashant Bhole]

test_sockmap was originally written only to exercise kernel code
paths, so there was no strict checking of errors. When the code was
modified to run as selftests, due to lack of error handling it was not
able to detect test failures.

In order to improve, this series fixes error handling, test run time
and data verification.

Also slightly improved test output by printing parameter values (cork,
apply, start, end) so that parameters for all tests are displayed.

Changes in v4:
  - patch1: Ignore RX timoute error only for corked tests
  - patch3: Setting different timeout for corked tests and reduce
      run time by reducing number of iterations in some tests

Changes in v3:
  - Skipped error checking for corked tests

Prashant Bhole (5):
  selftests/bpf: test_sockmap, check test failure
  selftests/bpf: test_sockmap, join cgroup in selftest mode
  selftests/bpf: test_sockmap, timing improvements
  selftests/bpf: test_sockmap, fix data verification
  selftests/bpf: test_sockmap, print additional test options

 tools/testing/selftests/bpf/test_sockmap.c | 87 +++++++++++++++++-----
 1 file changed, 67 insertions(+), 20 deletions(-)

-- 
2.17.0

[PATCH bpf-next v4 0/5] fix test_sockmap

[Prashant Bhole]

test_sockmap was originally written only to exercise kernel code
paths, so there was no strict checking of errors. When the code was
modified to run as selftests, due to lack of error handling it was not
able to detect test failures.

In order to improve, this series fixes error handling, test run time
and data verification.

Also slightly improved test output by printing parameter values (cork,
apply, start, end) so that parameters for all tests are displayed.

Changes in v4:
  - patch1: Ignore RX timoute error only for corked tests
  - patch3: Setting different timeout for corked tests and reduce
      run time by reducing number of iterations in some tests

Changes in v3:
  - Skipped error checking for corked tests

Prashant Bhole (5):
  selftests/bpf: test_sockmap, check test failure
  selftests/bpf: test_sockmap, join cgroup in selftest mode
  selftests/bpf: test_sockmap, timing improvements
  selftests/bpf: test_sockmap, fix data verification
  selftests/bpf: test_sockmap, print additional test options

 tools/testing/selftests/bpf/test_sockmap.c | 87 +++++++++++++++++-----
 1 file changed, 67 insertions(+), 20 deletions(-)

-- 
2.17.0


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[PATCH bpf-next v4 0/5] fix test_sockmap

[bhole_prashant_q7]

test_sockmap was originally written only to exercise kernel code
paths, so there was no strict checking of errors. When the code was
modified to run as selftests, due to lack of error handling it was not
able to detect test failures.

In order to improve, this series fixes error handling, test run time
and data verification.

Also slightly improved test output by printing parameter values (cork,
apply, start, end) so that parameters for all tests are displayed.

Changes in v4:
  - patch1: Ignore RX timoute error only for corked tests
  - patch3: Setting different timeout for corked tests and reduce
      run time by reducing number of iterations in some tests

Changes in v3:
  - Skipped error checking for corked tests

Prashant Bhole (5):
  selftests/bpf: test_sockmap, check test failure
  selftests/bpf: test_sockmap, join cgroup in selftest mode
  selftests/bpf: test_sockmap, timing improvements
  selftests/bpf: test_sockmap, fix data verification
  selftests/bpf: test_sockmap, print additional test options

 tools/testing/selftests/bpf/test_sockmap.c | 87 +++++++++++++++++-----
 1 file changed, 67 insertions(+), 20 deletions(-)

-- 
2.17.0


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[PATCH bpf-next v4 1/5] selftests/bpf: test_sockmap, check test failure

[Prashant Bhole]

Test failures are not identified because exit code of RX/TX threads
is not checked. Also threads are not returning correct exit code.

- Return exit code from threads depending on test execution status
- In main thread, check the exit code of RX/TX threads
- Skip error checking for corked tests as they are expected to timeout

Fixes: 16962b2404ac ("bpf: sockmap, add selftests")
Signed-off-by: Prashant Bhole <bhole_prashant_q7@lab.ntt.co.jp>
---
 tools/testing/selftests/bpf/test_sockmap.c | 27 +++++++++++++++++-----
 1 file changed, 21 insertions(+), 6 deletions(-)

diff --git a/tools/testing/selftests/bpf/test_sockmap.c b/tools/testing/selftests/bpf/test_sockmap.c
index eb17fae458e6..7b2008a144cb 100644
--- a/tools/testing/selftests/bpf/test_sockmap.c
+++ b/tools/testing/selftests/bpf/test_sockmap.c
@@ -429,8 +429,8 @@ static int sendmsg_test(struct sockmap_options *opt)
 	struct msg_stats s = {0};
 	int iov_count = opt->iov_count;
 	int iov_buf = opt->iov_length;
+	int rx_status, tx_status;
 	int cnt = opt->rate;
-	int status;
 
 	errno = 0;
 
@@ -442,7 +442,7 @@ static int sendmsg_test(struct sockmap_options *opt)
 	rxpid = fork();
 	if (rxpid == 0) {
 		if (opt->drop_expected)
-			exit(1);
+			exit(0);
 
 		if (opt->sendpage)
 			iov_count = 1;
@@ -463,7 +463,9 @@ static int sendmsg_test(struct sockmap_options *opt)
 				"rx_sendmsg: TX: %zuB %fB/s %fGB/s RX: %zuB %fB/s %fGB/s\n",
 				s.bytes_sent, sent_Bps, sent_Bps/giga,
 				s.bytes_recvd, recvd_Bps, recvd_Bps/giga);
-		exit(1);
+		if (err && txmsg_cork)
+			err = 0;
+		exit(err ? 1 : 0);
 	} else if (rxpid == -1) {
 		perror("msg_loop_rx: ");
 		return errno;
@@ -491,14 +493,27 @@ static int sendmsg_test(struct sockmap_options *opt)
 				"tx_sendmsg: TX: %zuB %fB/s %f GB/s RX: %zuB %fB/s %fGB/s\n",
 				s.bytes_sent, sent_Bps, sent_Bps/giga,
 				s.bytes_recvd, recvd_Bps, recvd_Bps/giga);
-		exit(1);
+		exit(err ? 1 : 0);
 	} else if (txpid == -1) {
 		perror("msg_loop_tx: ");
 		return errno;
 	}
 
-	assert(waitpid(rxpid, &status, 0) == rxpid);
-	assert(waitpid(txpid, &status, 0) == txpid);
+	assert(waitpid(rxpid, &rx_status, 0) == rxpid);
+	assert(waitpid(txpid, &tx_status, 0) == txpid);
+	if (WIFEXITED(rx_status)) {
+		err = WEXITSTATUS(rx_status);
+		if (err) {
+			fprintf(stderr, "rx thread exited with err %d. ", err);
+			goto out;
+		}
+	}
+	if (WIFEXITED(tx_status)) {
+		err = WEXITSTATUS(tx_status);
+		if (err)
+			fprintf(stderr, "tx thread exited with err %d. ", err);
+	}
+out:
 	return err;
 }
 
-- 
2.17.0

[PATCH bpf-next v4 1/5] selftests/bpf: test_sockmap, check test failure

[Prashant Bhole]

Test failures are not identified because exit code of RX/TX threads
is not checked. Also threads are not returning correct exit code.

- Return exit code from threads depending on test execution status
- In main thread, check the exit code of RX/TX threads
- Skip error checking for corked tests as they are expected to timeout

Fixes: 16962b2404ac ("bpf: sockmap, add selftests")
Signed-off-by: Prashant Bhole <bhole_prashant_q7 at lab.ntt.co.jp>
---
 tools/testing/selftests/bpf/test_sockmap.c | 27 +++++++++++++++++-----
 1 file changed, 21 insertions(+), 6 deletions(-)

diff --git a/tools/testing/selftests/bpf/test_sockmap.c b/tools/testing/selftests/bpf/test_sockmap.c
index eb17fae458e6..7b2008a144cb 100644
--- a/tools/testing/selftests/bpf/test_sockmap.c
+++ b/tools/testing/selftests/bpf/test_sockmap.c
@@ -429,8 +429,8 @@ static int sendmsg_test(struct sockmap_options *opt)
 	struct msg_stats s = {0};
 	int iov_count = opt->iov_count;
 	int iov_buf = opt->iov_length;
+	int rx_status, tx_status;
 	int cnt = opt->rate;
-	int status;
 
 	errno = 0;
 
@@ -442,7 +442,7 @@ static int sendmsg_test(struct sockmap_options *opt)
 	rxpid = fork();
 	if (rxpid == 0) {
 		if (opt->drop_expected)
-			exit(1);
+			exit(0);
 
 		if (opt->sendpage)
 			iov_count = 1;
@@ -463,7 +463,9 @@ static int sendmsg_test(struct sockmap_options *opt)
 				"rx_sendmsg: TX: %zuB %fB/s %fGB/s RX: %zuB %fB/s %fGB/s\n",
 				s.bytes_sent, sent_Bps, sent_Bps/giga,
 				s.bytes_recvd, recvd_Bps, recvd_Bps/giga);
-		exit(1);
+		if (err && txmsg_cork)
+			err = 0;
+		exit(err ? 1 : 0);
 	} else if (rxpid == -1) {
 		perror("msg_loop_rx: ");
 		return errno;
@@ -491,14 +493,27 @@ static int sendmsg_test(struct sockmap_options *opt)
 				"tx_sendmsg: TX: %zuB %fB/s %f GB/s RX: %zuB %fB/s %fGB/s\n",
 				s.bytes_sent, sent_Bps, sent_Bps/giga,
 				s.bytes_recvd, recvd_Bps, recvd_Bps/giga);
-		exit(1);
+		exit(err ? 1 : 0);
 	} else if (txpid == -1) {
 		perror("msg_loop_tx: ");
 		return errno;
 	}
 
-	assert(waitpid(rxpid, &status, 0) == rxpid);
-	assert(waitpid(txpid, &status, 0) == txpid);
+	assert(waitpid(rxpid, &rx_status, 0) == rxpid);
+	assert(waitpid(txpid, &tx_status, 0) == txpid);
+	if (WIFEXITED(rx_status)) {
+		err = WEXITSTATUS(rx_status);
+		if (err) {
+			fprintf(stderr, "rx thread exited with err %d. ", err);
+			goto out;
+		}
+	}
+	if (WIFEXITED(tx_status)) {
+		err = WEXITSTATUS(tx_status);
+		if (err)
+			fprintf(stderr, "tx thread exited with err %d. ", err);
+	}
+out:
 	return err;
 }
 
-- 
2.17.0


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[PATCH bpf-next v4 1/5] selftests/bpf: test_sockmap, check test failure

[bhole_prashant_q7]

Test failures are not identified because exit code of RX/TX threads
is not checked. Also threads are not returning correct exit code.

- Return exit code from threads depending on test execution status
- In main thread, check the exit code of RX/TX threads
- Skip error checking for corked tests as they are expected to timeout

Fixes: 16962b2404ac ("bpf: sockmap, add selftests")
Signed-off-by: Prashant Bhole <bhole_prashant_q7 at lab.ntt.co.jp>
---
 tools/testing/selftests/bpf/test_sockmap.c | 27 +++++++++++++++++-----
 1 file changed, 21 insertions(+), 6 deletions(-)

diff --git a/tools/testing/selftests/bpf/test_sockmap.c b/tools/testing/selftests/bpf/test_sockmap.c
index eb17fae458e6..7b2008a144cb 100644
--- a/tools/testing/selftests/bpf/test_sockmap.c
+++ b/tools/testing/selftests/bpf/test_sockmap.c
@@ -429,8 +429,8 @@ static int sendmsg_test(struct sockmap_options *opt)
 	struct msg_stats s = {0};
 	int iov_count = opt->iov_count;
 	int iov_buf = opt->iov_length;
+	int rx_status, tx_status;
 	int cnt = opt->rate;
-	int status;
 
 	errno = 0;
 
@@ -442,7 +442,7 @@ static int sendmsg_test(struct sockmap_options *opt)
 	rxpid = fork();
 	if (rxpid == 0) {
 		if (opt->drop_expected)
-			exit(1);
+			exit(0);
 
 		if (opt->sendpage)
 			iov_count = 1;
@@ -463,7 +463,9 @@ static int sendmsg_test(struct sockmap_options *opt)
 				"rx_sendmsg: TX: %zuB %fB/s %fGB/s RX: %zuB %fB/s %fGB/s\n",
 				s.bytes_sent, sent_Bps, sent_Bps/giga,
 				s.bytes_recvd, recvd_Bps, recvd_Bps/giga);
-		exit(1);
+		if (err && txmsg_cork)
+			err = 0;
+		exit(err ? 1 : 0);
 	} else if (rxpid == -1) {
 		perror("msg_loop_rx: ");
 		return errno;
@@ -491,14 +493,27 @@ static int sendmsg_test(struct sockmap_options *opt)
 				"tx_sendmsg: TX: %zuB %fB/s %f GB/s RX: %zuB %fB/s %fGB/s\n",
 				s.bytes_sent, sent_Bps, sent_Bps/giga,
 				s.bytes_recvd, recvd_Bps, recvd_Bps/giga);
-		exit(1);
+		exit(err ? 1 : 0);
 	} else if (txpid == -1) {
 		perror("msg_loop_tx: ");
 		return errno;
 	}
 
-	assert(waitpid(rxpid, &status, 0) == rxpid);
-	assert(waitpid(txpid, &status, 0) == txpid);
+	assert(waitpid(rxpid, &rx_status, 0) == rxpid);
+	assert(waitpid(txpid, &tx_status, 0) == txpid);
+	if (WIFEXITED(rx_status)) {
+		err = WEXITSTATUS(rx_status);
+		if (err) {
+			fprintf(stderr, "rx thread exited with err %d. ", err);
+			goto out;
+		}
+	}
+	if (WIFEXITED(tx_status)) {
+		err = WEXITSTATUS(tx_status);
+		if (err)
+			fprintf(stderr, "tx thread exited with err %d. ", err);
+	}
+out:
 	return err;
 }
 
-- 
2.17.0


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Re: [PATCH bpf-next v4 1/5] selftests/bpf: test_sockmap, check test failure

[John Fastabend]

On 05/30/2018 09:42 PM, Prashant Bhole wrote:
> Test failures are not identified because exit code of RX/TX threads
> is not checked. Also threads are not returning correct exit code.
> 
> - Return exit code from threads depending on test execution status
> - In main thread, check the exit code of RX/TX threads
> - Skip error checking for corked tests as they are expected to timeout
> 
> Fixes: 16962b2404ac ("bpf: sockmap, add selftests")
> Signed-off-by: Prashant Bhole <bhole_prashant_q7@lab.ntt.co.jp>
> ---


Acked-by: John Fastabend <john.fastabend@gmail.com>

[PATCH bpf-next v4 1/5] selftests/bpf: test_sockmap, check test failure

[John Fastabend]

On 05/30/2018 09:42 PM, Prashant Bhole wrote:
> Test failures are not identified because exit code of RX/TX threads
> is not checked. Also threads are not returning correct exit code.
> 
> - Return exit code from threads depending on test execution status
> - In main thread, check the exit code of RX/TX threads
> - Skip error checking for corked tests as they are expected to timeout
> 
> Fixes: 16962b2404ac ("bpf: sockmap, add selftests")
> Signed-off-by: Prashant Bhole <bhole_prashant_q7 at lab.ntt.co.jp>
> ---


Acked-by: John Fastabend <john.fastabend at gmail.com>

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[PATCH bpf-next v4 1/5] selftests/bpf: test_sockmap, check test failure

[john.fastabend]

On 05/30/2018 09:42 PM, Prashant Bhole wrote:
> Test failures are not identified because exit code of RX/TX threads
> is not checked. Also threads are not returning correct exit code.
> 
> - Return exit code from threads depending on test execution status
> - In main thread, check the exit code of RX/TX threads
> - Skip error checking for corked tests as they are expected to timeout
> 
> Fixes: 16962b2404ac ("bpf: sockmap, add selftests")
> Signed-off-by: Prashant Bhole <bhole_prashant_q7 at lab.ntt.co.jp>
> ---


Acked-by: John Fastabend <john.fastabend at gmail.com>

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[PATCH bpf-next v4 2/5] selftests/bpf: test_sockmap, join cgroup in selftest mode

[Prashant Bhole]

In case of selftest mode, temporary cgroup environment is created but
cgroup is not joined. It causes test failures. Fixed by joining the
cgroup

Fixes: 16962b2404ac ("bpf: sockmap, add selftests")
Acked-by: John Fastabend <john.fastabend@gmail.com>
Signed-off-by: Prashant Bhole <bhole_prashant_q7@lab.ntt.co.jp>
---
 tools/testing/selftests/bpf/test_sockmap.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/tools/testing/selftests/bpf/test_sockmap.c b/tools/testing/selftests/bpf/test_sockmap.c
index 7b2008a144cb..7f9ca79aadbc 100644
--- a/tools/testing/selftests/bpf/test_sockmap.c
+++ b/tools/testing/selftests/bpf/test_sockmap.c
@@ -1344,6 +1344,11 @@ static int __test_suite(char *bpf_file)
 		return cg_fd;
 	}
 
+	if (join_cgroup(CG_PATH)) {
+		fprintf(stderr, "ERROR: failed to join cgroup\n");
+		return -EINVAL;
+	}
+
 	/* Tests basic commands and APIs with range of iov values */
 	txmsg_start = txmsg_end = 0;
 	err = test_txmsg(cg_fd);
-- 
2.17.0

[PATCH bpf-next v4 2/5] selftests/bpf: test_sockmap, join cgroup in selftest mode

[Prashant Bhole]

In case of selftest mode, temporary cgroup environment is created but
cgroup is not joined. It causes test failures. Fixed by joining the
cgroup

Fixes: 16962b2404ac ("bpf: sockmap, add selftests")
Acked-by: John Fastabend <john.fastabend at gmail.com>
Signed-off-by: Prashant Bhole <bhole_prashant_q7 at lab.ntt.co.jp>
---
 tools/testing/selftests/bpf/test_sockmap.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/tools/testing/selftests/bpf/test_sockmap.c b/tools/testing/selftests/bpf/test_sockmap.c
index 7b2008a144cb..7f9ca79aadbc 100644
--- a/tools/testing/selftests/bpf/test_sockmap.c
+++ b/tools/testing/selftests/bpf/test_sockmap.c
@@ -1344,6 +1344,11 @@ static int __test_suite(char *bpf_file)
 		return cg_fd;
 	}
 
+	if (join_cgroup(CG_PATH)) {
+		fprintf(stderr, "ERROR: failed to join cgroup\n");
+		return -EINVAL;
+	}
+
 	/* Tests basic commands and APIs with range of iov values */
 	txmsg_start = txmsg_end = 0;
 	err = test_txmsg(cg_fd);
-- 
2.17.0


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[PATCH bpf-next v4 2/5] selftests/bpf: test_sockmap, join cgroup in selftest mode

[bhole_prashant_q7]

In case of selftest mode, temporary cgroup environment is created but
cgroup is not joined. It causes test failures. Fixed by joining the
cgroup

Fixes: 16962b2404ac ("bpf: sockmap, add selftests")
Acked-by: John Fastabend <john.fastabend at gmail.com>
Signed-off-by: Prashant Bhole <bhole_prashant_q7 at lab.ntt.co.jp>
---
 tools/testing/selftests/bpf/test_sockmap.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/tools/testing/selftests/bpf/test_sockmap.c b/tools/testing/selftests/bpf/test_sockmap.c
index 7b2008a144cb..7f9ca79aadbc 100644
--- a/tools/testing/selftests/bpf/test_sockmap.c
+++ b/tools/testing/selftests/bpf/test_sockmap.c
@@ -1344,6 +1344,11 @@ static int __test_suite(char *bpf_file)
 		return cg_fd;
 	}
 
+	if (join_cgroup(CG_PATH)) {
+		fprintf(stderr, "ERROR: failed to join cgroup\n");
+		return -EINVAL;
+	}
+
 	/* Tests basic commands and APIs with range of iov values */
 	txmsg_start = txmsg_end = 0;
 	err = test_txmsg(cg_fd);
-- 
2.17.0


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[PATCH bpf-next v4 3/5] selftests/bpf: test_sockmap, timing improvements

[Prashant Bhole]

Currently 10us delay is too low for many tests to succeed. It needs to
be increased. Also, many corked tests are expected to hit rx timeout
irrespective of timeout value.

- This patch sets 1000usec timeout value for corked tests because less
than that causes broken-pipe error in tx thread. Also sets 1 second
timeout for all other tests because less than that results in RX
timeout
- tests with apply=1 and higher number of iterations were taking lot
of time. This patch reduces test run time by reducing iterations.

real    0m12.968s
user    0m0.219s
sys     0m14.337s

Fixes: a18fda1a62c3 ("bpf: reduce runtime of test_sockmap tests")
Signed-off-by: Prashant Bhole <bhole_prashant_q7@lab.ntt.co.jp>
---
 tools/testing/selftests/bpf/test_sockmap.c | 13 +++++++++----
 1 file changed, 9 insertions(+), 4 deletions(-)

diff --git a/tools/testing/selftests/bpf/test_sockmap.c b/tools/testing/selftests/bpf/test_sockmap.c
index 7f9ca79aadbc..5cd0550af595 100644
--- a/tools/testing/selftests/bpf/test_sockmap.c
+++ b/tools/testing/selftests/bpf/test_sockmap.c
@@ -345,8 +345,13 @@ static int msg_loop(int fd, int iov_count, int iov_length, int cnt,
 		if (err < 0)
 			perror("recv start time: ");
 		while (s->bytes_recvd < total_bytes) {
-			timeout.tv_sec = 0;
-			timeout.tv_usec = 10;
+			if (txmsg_cork) {
+				timeout.tv_sec = 0;
+				timeout.tv_usec = 1000;
+			} else {
+				timeout.tv_sec = 1;
+				timeout.tv_usec = 0;
+			}
 
 			/* FD sets */
 			FD_ZERO(&w);
@@ -1025,14 +1030,14 @@ static int test_send(struct sockmap_options *opt, int cgrp)
 
 	opt->iov_length = 1;
 	opt->iov_count = 1;
-	opt->rate = 1024;
+	opt->rate = 512;
 	err = test_exec(cgrp, opt);
 	if (err)
 		goto out;
 
 	opt->iov_length = 256;
 	opt->iov_count = 1024;
-	opt->rate = 10;
+	opt->rate = 2;
 	err = test_exec(cgrp, opt);
 	if (err)
 		goto out;
-- 
2.17.0

[PATCH bpf-next v4 3/5] selftests/bpf: test_sockmap, timing improvements

[Prashant Bhole]

Currently 10us delay is too low for many tests to succeed. It needs to
be increased. Also, many corked tests are expected to hit rx timeout
irrespective of timeout value.

- This patch sets 1000usec timeout value for corked tests because less
than that causes broken-pipe error in tx thread. Also sets 1 second
timeout for all other tests because less than that results in RX
timeout
- tests with apply=1 and higher number of iterations were taking lot
of time. This patch reduces test run time by reducing iterations.

real    0m12.968s
user    0m0.219s
sys     0m14.337s

Fixes: a18fda1a62c3 ("bpf: reduce runtime of test_sockmap tests")
Signed-off-by: Prashant Bhole <bhole_prashant_q7 at lab.ntt.co.jp>
---
 tools/testing/selftests/bpf/test_sockmap.c | 13 +++++++++----
 1 file changed, 9 insertions(+), 4 deletions(-)

diff --git a/tools/testing/selftests/bpf/test_sockmap.c b/tools/testing/selftests/bpf/test_sockmap.c
index 7f9ca79aadbc..5cd0550af595 100644
--- a/tools/testing/selftests/bpf/test_sockmap.c
+++ b/tools/testing/selftests/bpf/test_sockmap.c
@@ -345,8 +345,13 @@ static int msg_loop(int fd, int iov_count, int iov_length, int cnt,
 		if (err < 0)
 			perror("recv start time: ");
 		while (s->bytes_recvd < total_bytes) {
-			timeout.tv_sec = 0;
-			timeout.tv_usec = 10;
+			if (txmsg_cork) {
+				timeout.tv_sec = 0;
+				timeout.tv_usec = 1000;
+			} else {
+				timeout.tv_sec = 1;
+				timeout.tv_usec = 0;
+			}
 
 			/* FD sets */
 			FD_ZERO(&w);
@@ -1025,14 +1030,14 @@ static int test_send(struct sockmap_options *opt, int cgrp)
 
 	opt->iov_length = 1;
 	opt->iov_count = 1;
-	opt->rate = 1024;
+	opt->rate = 512;
 	err = test_exec(cgrp, opt);
 	if (err)
 		goto out;
 
 	opt->iov_length = 256;
 	opt->iov_count = 1024;
-	opt->rate = 10;
+	opt->rate = 2;
 	err = test_exec(cgrp, opt);
 	if (err)
 		goto out;
-- 
2.17.0


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[PATCH bpf-next v4 3/5] selftests/bpf: test_sockmap, timing improvements

[bhole_prashant_q7]

Currently 10us delay is too low for many tests to succeed. It needs to
be increased. Also, many corked tests are expected to hit rx timeout
irrespective of timeout value.

- This patch sets 1000usec timeout value for corked tests because less
than that causes broken-pipe error in tx thread. Also sets 1 second
timeout for all other tests because less than that results in RX
timeout
- tests with apply=1 and higher number of iterations were taking lot
of time. This patch reduces test run time by reducing iterations.

real    0m12.968s
user    0m0.219s
sys     0m14.337s

Fixes: a18fda1a62c3 ("bpf: reduce runtime of test_sockmap tests")
Signed-off-by: Prashant Bhole <bhole_prashant_q7 at lab.ntt.co.jp>
---
 tools/testing/selftests/bpf/test_sockmap.c | 13 +++++++++----
 1 file changed, 9 insertions(+), 4 deletions(-)

diff --git a/tools/testing/selftests/bpf/test_sockmap.c b/tools/testing/selftests/bpf/test_sockmap.c
index 7f9ca79aadbc..5cd0550af595 100644
--- a/tools/testing/selftests/bpf/test_sockmap.c
+++ b/tools/testing/selftests/bpf/test_sockmap.c
@@ -345,8 +345,13 @@ static int msg_loop(int fd, int iov_count, int iov_length, int cnt,
 		if (err < 0)
 			perror("recv start time: ");
 		while (s->bytes_recvd < total_bytes) {
-			timeout.tv_sec = 0;
-			timeout.tv_usec = 10;
+			if (txmsg_cork) {
+				timeout.tv_sec = 0;
+				timeout.tv_usec = 1000;
+			} else {
+				timeout.tv_sec = 1;
+				timeout.tv_usec = 0;
+			}
 
 			/* FD sets */
 			FD_ZERO(&w);
@@ -1025,14 +1030,14 @@ static int test_send(struct sockmap_options *opt, int cgrp)
 
 	opt->iov_length = 1;
 	opt->iov_count = 1;
-	opt->rate = 1024;
+	opt->rate = 512;
 	err = test_exec(cgrp, opt);
 	if (err)
 		goto out;
 
 	opt->iov_length = 256;
 	opt->iov_count = 1024;
-	opt->rate = 10;
+	opt->rate = 2;
 	err = test_exec(cgrp, opt);
 	if (err)
 		goto out;
-- 
2.17.0


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Re: [PATCH bpf-next v4 3/5] selftests/bpf: test_sockmap, timing improvements

[John Fastabend]

On 05/30/2018 09:42 PM, Prashant Bhole wrote:
> Currently 10us delay is too low for many tests to succeed. It needs to
> be increased. Also, many corked tests are expected to hit rx timeout
> irrespective of timeout value.
> 
> - This patch sets 1000usec timeout value for corked tests because less
> than that causes broken-pipe error in tx thread. Also sets 1 second
> timeout for all other tests because less than that results in RX
> timeout
> - tests with apply=1 and higher number of iterations were taking lot
> of time. This patch reduces test run time by reducing iterations.
> 
> real    0m12.968s
> user    0m0.219s
> sys     0m14.337s
> 
> Fixes: a18fda1a62c3 ("bpf: reduce runtime of test_sockmap tests")
> Signed-off-by: Prashant Bhole <bhole_prashant_q7@lab.ntt.co.jp>
> ---

OK seems more reasonable to me. We could probably even go lower
on some of the 'rate' values here if needed (512->128).

Acked-by: John Fastabend <john.fastabend@gmail.com>

[PATCH bpf-next v4 3/5] selftests/bpf: test_sockmap, timing improvements

[John Fastabend]

On 05/30/2018 09:42 PM, Prashant Bhole wrote:
> Currently 10us delay is too low for many tests to succeed. It needs to
> be increased. Also, many corked tests are expected to hit rx timeout
> irrespective of timeout value.
> 
> - This patch sets 1000usec timeout value for corked tests because less
> than that causes broken-pipe error in tx thread. Also sets 1 second
> timeout for all other tests because less than that results in RX
> timeout
> - tests with apply=1 and higher number of iterations were taking lot
> of time. This patch reduces test run time by reducing iterations.
> 
> real    0m12.968s
> user    0m0.219s
> sys     0m14.337s
> 
> Fixes: a18fda1a62c3 ("bpf: reduce runtime of test_sockmap tests")
> Signed-off-by: Prashant Bhole <bhole_prashant_q7 at lab.ntt.co.jp>
> ---

OK seems more reasonable to me. We could probably even go lower
on some of the 'rate' values here if needed (512->128).

Acked-by: John Fastabend <john.fastabend at gmail.com>

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[PATCH bpf-next v4 3/5] selftests/bpf: test_sockmap, timing improvements

[john.fastabend]

On 05/30/2018 09:42 PM, Prashant Bhole wrote:
> Currently 10us delay is too low for many tests to succeed. It needs to
> be increased. Also, many corked tests are expected to hit rx timeout
> irrespective of timeout value.
> 
> - This patch sets 1000usec timeout value for corked tests because less
> than that causes broken-pipe error in tx thread. Also sets 1 second
> timeout for all other tests because less than that results in RX
> timeout
> - tests with apply=1 and higher number of iterations were taking lot
> of time. This patch reduces test run time by reducing iterations.
> 
> real    0m12.968s
> user    0m0.219s
> sys     0m14.337s
> 
> Fixes: a18fda1a62c3 ("bpf: reduce runtime of test_sockmap tests")
> Signed-off-by: Prashant Bhole <bhole_prashant_q7 at lab.ntt.co.jp>
> ---

OK seems more reasonable to me. We could probably even go lower
on some of the 'rate' values here if needed (512->128).

Acked-by: John Fastabend <john.fastabend at gmail.com>

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[PATCH bpf-next v4 4/5] selftests/bpf: test_sockmap, fix data verification

[Prashant Bhole]

When data verification is enabled, some tests fail because verification is done
incorrectly. Following changes fix it.

- Identify the size of data block to be verified
- Reset verification counter when data block size is reached
- Fixed the value printed in case of verfication failure

Fixes: 16962b2404ac ("bpf: sockmap, add selftests")
Acked-by: John Fastabend <john.fastabend@gmail.com>
Signed-off-by: Prashant Bhole <bhole_prashant_q7@lab.ntt.co.jp>
---
 tools/testing/selftests/bpf/test_sockmap.c | 14 +++++++++++++-
 1 file changed, 13 insertions(+), 1 deletion(-)

diff --git a/tools/testing/selftests/bpf/test_sockmap.c b/tools/testing/selftests/bpf/test_sockmap.c
index 5cd0550af595..2bc70e1ab2eb 100644
--- a/tools/testing/selftests/bpf/test_sockmap.c
+++ b/tools/testing/selftests/bpf/test_sockmap.c
@@ -337,8 +337,15 @@ static int msg_loop(int fd, int iov_count, int iov_length, int cnt,
 		int fd_flags = O_NONBLOCK;
 		struct timeval timeout;
 		float total_bytes;
+		int bytes_cnt = 0;
+		int chunk_sz;
 		fd_set w;
 
+		if (opt->sendpage)
+			chunk_sz = iov_length * cnt;
+		else
+			chunk_sz = iov_length * iov_count;
+
 		fcntl(fd, fd_flags);
 		total_bytes = (float)iov_count * (float)iov_length * (float)cnt;
 		err = clock_gettime(CLOCK_MONOTONIC, &s->start);
@@ -393,9 +400,14 @@ static int msg_loop(int fd, int iov_count, int iov_length, int cnt,
 							errno = -EIO;
 							fprintf(stderr,
 								"detected data corruption @iov[%i]:%i %02x != %02x, %02x ?= %02x\n",
-								i, j, d[j], k - 1, d[j+1], k + 1);
+								i, j, d[j], k - 1, d[j+1], k);
 							goto out_errno;
 						}
+						bytes_cnt++;
+						if (bytes_cnt == chunk_sz) {
+							k = 0;
+							bytes_cnt = 0;
+						}
 						recv--;
 					}
 				}
-- 
2.17.0

[PATCH bpf-next v4 4/5] selftests/bpf: test_sockmap, fix data verification

[Prashant Bhole]

When data verification is enabled, some tests fail because verification is done
incorrectly. Following changes fix it.

- Identify the size of data block to be verified
- Reset verification counter when data block size is reached
- Fixed the value printed in case of verfication failure

Fixes: 16962b2404ac ("bpf: sockmap, add selftests")
Acked-by: John Fastabend <john.fastabend at gmail.com>
Signed-off-by: Prashant Bhole <bhole_prashant_q7 at lab.ntt.co.jp>
---
 tools/testing/selftests/bpf/test_sockmap.c | 14 +++++++++++++-
 1 file changed, 13 insertions(+), 1 deletion(-)

diff --git a/tools/testing/selftests/bpf/test_sockmap.c b/tools/testing/selftests/bpf/test_sockmap.c
index 5cd0550af595..2bc70e1ab2eb 100644
--- a/tools/testing/selftests/bpf/test_sockmap.c
+++ b/tools/testing/selftests/bpf/test_sockmap.c
@@ -337,8 +337,15 @@ static int msg_loop(int fd, int iov_count, int iov_length, int cnt,
 		int fd_flags = O_NONBLOCK;
 		struct timeval timeout;
 		float total_bytes;
+		int bytes_cnt = 0;
+		int chunk_sz;
 		fd_set w;
 
+		if (opt->sendpage)
+			chunk_sz = iov_length * cnt;
+		else
+			chunk_sz = iov_length * iov_count;
+
 		fcntl(fd, fd_flags);
 		total_bytes = (float)iov_count * (float)iov_length * (float)cnt;
 		err = clock_gettime(CLOCK_MONOTONIC, &s->start);
@@ -393,9 +400,14 @@ static int msg_loop(int fd, int iov_count, int iov_length, int cnt,
 							errno = -EIO;
 							fprintf(stderr,
 								"detected data corruption @iov[%i]:%i %02x != %02x, %02x ?= %02x\n",
-								i, j, d[j], k - 1, d[j+1], k + 1);
+								i, j, d[j], k - 1, d[j+1], k);
 							goto out_errno;
 						}
+						bytes_cnt++;
+						if (bytes_cnt == chunk_sz) {
+							k = 0;
+							bytes_cnt = 0;
+						}
 						recv--;
 					}
 				}
-- 
2.17.0


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[PATCH bpf-next v4 4/5] selftests/bpf: test_sockmap, fix data verification

[bhole_prashant_q7]

When data verification is enabled, some tests fail because verification is done
incorrectly. Following changes fix it.

- Identify the size of data block to be verified
- Reset verification counter when data block size is reached
- Fixed the value printed in case of verfication failure

Fixes: 16962b2404ac ("bpf: sockmap, add selftests")
Acked-by: John Fastabend <john.fastabend at gmail.com>
Signed-off-by: Prashant Bhole <bhole_prashant_q7 at lab.ntt.co.jp>
---
 tools/testing/selftests/bpf/test_sockmap.c | 14 +++++++++++++-
 1 file changed, 13 insertions(+), 1 deletion(-)

diff --git a/tools/testing/selftests/bpf/test_sockmap.c b/tools/testing/selftests/bpf/test_sockmap.c
index 5cd0550af595..2bc70e1ab2eb 100644
--- a/tools/testing/selftests/bpf/test_sockmap.c
+++ b/tools/testing/selftests/bpf/test_sockmap.c
@@ -337,8 +337,15 @@ static int msg_loop(int fd, int iov_count, int iov_length, int cnt,
 		int fd_flags = O_NONBLOCK;
 		struct timeval timeout;
 		float total_bytes;
+		int bytes_cnt = 0;
+		int chunk_sz;
 		fd_set w;
 
+		if (opt->sendpage)
+			chunk_sz = iov_length * cnt;
+		else
+			chunk_sz = iov_length * iov_count;
+
 		fcntl(fd, fd_flags);
 		total_bytes = (float)iov_count * (float)iov_length * (float)cnt;
 		err = clock_gettime(CLOCK_MONOTONIC, &s->start);
@@ -393,9 +400,14 @@ static int msg_loop(int fd, int iov_count, int iov_length, int cnt,
 							errno = -EIO;
 							fprintf(stderr,
 								"detected data corruption @iov[%i]:%i %02x != %02x, %02x ?= %02x\n",
-								i, j, d[j], k - 1, d[j+1], k + 1);
+								i, j, d[j], k - 1, d[j+1], k);
 							goto out_errno;
 						}
+						bytes_cnt++;
+						if (bytes_cnt == chunk_sz) {
+							k = 0;
+							bytes_cnt = 0;
+						}
 						recv--;
 					}
 				}
-- 
2.17.0


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[PATCH bpf-next v4 5/5] selftests/bpf: test_sockmap, print additional test options

[Prashant Bhole]

Print values of test options like apply, cork, start, end so that
individual failed tests can be identified for manual run

Acked-by: John Fastabend <john.fastabend@gmail.com>
Signed-off-by: Prashant Bhole <bhole_prashant_q7@lab.ntt.co.jp>
---
 tools/testing/selftests/bpf/test_sockmap.c | 28 +++++++++++++++-------
 1 file changed, 19 insertions(+), 9 deletions(-)

diff --git a/tools/testing/selftests/bpf/test_sockmap.c b/tools/testing/selftests/bpf/test_sockmap.c
index 2bc70e1ab2eb..05c8cb71724a 100644
--- a/tools/testing/selftests/bpf/test_sockmap.c
+++ b/tools/testing/selftests/bpf/test_sockmap.c
@@ -876,6 +876,8 @@ static char *test_to_str(int test)
 #define OPTSTRING 60
 static void test_options(char *options)
 {
+	char tstr[OPTSTRING];
+
 	memset(options, 0, OPTSTRING);
 
 	if (txmsg_pass)
@@ -888,14 +890,22 @@ static void test_options(char *options)
 		strncat(options, "redir_noisy,", OPTSTRING);
 	if (txmsg_drop)
 		strncat(options, "drop,", OPTSTRING);
-	if (txmsg_apply)
-		strncat(options, "apply,", OPTSTRING);
-	if (txmsg_cork)
-		strncat(options, "cork,", OPTSTRING);
-	if (txmsg_start)
-		strncat(options, "start,", OPTSTRING);
-	if (txmsg_end)
-		strncat(options, "end,", OPTSTRING);
+	if (txmsg_apply) {
+		snprintf(tstr, OPTSTRING, "apply %d,", txmsg_apply);
+		strncat(options, tstr, OPTSTRING);
+	}
+	if (txmsg_cork) {
+		snprintf(tstr, OPTSTRING, "cork %d,", txmsg_cork);
+		strncat(options, tstr, OPTSTRING);
+	}
+	if (txmsg_start) {
+		snprintf(tstr, OPTSTRING, "start %d,", txmsg_start);
+		strncat(options, tstr, OPTSTRING);
+	}
+	if (txmsg_end) {
+		snprintf(tstr, OPTSTRING, "end %d,", txmsg_end);
+		strncat(options, tstr, OPTSTRING);
+	}
 	if (txmsg_ingress)
 		strncat(options, "ingress,", OPTSTRING);
 	if (txmsg_skb)
@@ -904,7 +914,7 @@ static void test_options(char *options)
 
 static int __test_exec(int cgrp, int test, struct sockmap_options *opt)
 {
-	char *options = calloc(60, sizeof(char));
+	char *options = calloc(OPTSTRING, sizeof(char));
 	int err;
 
 	if (test == SENDPAGE)
-- 
2.17.0

[PATCH bpf-next v4 5/5] selftests/bpf: test_sockmap, print additional test options

[Prashant Bhole]

Print values of test options like apply, cork, start, end so that
individual failed tests can be identified for manual run

Acked-by: John Fastabend <john.fastabend at gmail.com>
Signed-off-by: Prashant Bhole <bhole_prashant_q7 at lab.ntt.co.jp>
---
 tools/testing/selftests/bpf/test_sockmap.c | 28 +++++++++++++++-------
 1 file changed, 19 insertions(+), 9 deletions(-)

diff --git a/tools/testing/selftests/bpf/test_sockmap.c b/tools/testing/selftests/bpf/test_sockmap.c
index 2bc70e1ab2eb..05c8cb71724a 100644
--- a/tools/testing/selftests/bpf/test_sockmap.c
+++ b/tools/testing/selftests/bpf/test_sockmap.c
@@ -876,6 +876,8 @@ static char *test_to_str(int test)
 #define OPTSTRING 60
 static void test_options(char *options)
 {
+	char tstr[OPTSTRING];
+
 	memset(options, 0, OPTSTRING);
 
 	if (txmsg_pass)
@@ -888,14 +890,22 @@ static void test_options(char *options)
 		strncat(options, "redir_noisy,", OPTSTRING);
 	if (txmsg_drop)
 		strncat(options, "drop,", OPTSTRING);
-	if (txmsg_apply)
-		strncat(options, "apply,", OPTSTRING);
-	if (txmsg_cork)
-		strncat(options, "cork,", OPTSTRING);
-	if (txmsg_start)
-		strncat(options, "start,", OPTSTRING);
-	if (txmsg_end)
-		strncat(options, "end,", OPTSTRING);
+	if (txmsg_apply) {
+		snprintf(tstr, OPTSTRING, "apply %d,", txmsg_apply);
+		strncat(options, tstr, OPTSTRING);
+	}
+	if (txmsg_cork) {
+		snprintf(tstr, OPTSTRING, "cork %d,", txmsg_cork);
+		strncat(options, tstr, OPTSTRING);
+	}
+	if (txmsg_start) {
+		snprintf(tstr, OPTSTRING, "start %d,", txmsg_start);
+		strncat(options, tstr, OPTSTRING);
+	}
+	if (txmsg_end) {
+		snprintf(tstr, OPTSTRING, "end %d,", txmsg_end);
+		strncat(options, tstr, OPTSTRING);
+	}
 	if (txmsg_ingress)
 		strncat(options, "ingress,", OPTSTRING);
 	if (txmsg_skb)
@@ -904,7 +914,7 @@ static void test_options(char *options)
 
 static int __test_exec(int cgrp, int test, struct sockmap_options *opt)
 {
-	char *options = calloc(60, sizeof(char));
+	char *options = calloc(OPTSTRING, sizeof(char));
 	int err;
 
 	if (test == SENDPAGE)
-- 
2.17.0


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[PATCH bpf-next v4 5/5] selftests/bpf: test_sockmap, print additional test options

[bhole_prashant_q7]

Print values of test options like apply, cork, start, end so that
individual failed tests can be identified for manual run

Acked-by: John Fastabend <john.fastabend at gmail.com>
Signed-off-by: Prashant Bhole <bhole_prashant_q7 at lab.ntt.co.jp>
---
 tools/testing/selftests/bpf/test_sockmap.c | 28 +++++++++++++++-------
 1 file changed, 19 insertions(+), 9 deletions(-)

diff --git a/tools/testing/selftests/bpf/test_sockmap.c b/tools/testing/selftests/bpf/test_sockmap.c
index 2bc70e1ab2eb..05c8cb71724a 100644
--- a/tools/testing/selftests/bpf/test_sockmap.c
+++ b/tools/testing/selftests/bpf/test_sockmap.c
@@ -876,6 +876,8 @@ static char *test_to_str(int test)
 #define OPTSTRING 60
 static void test_options(char *options)
 {
+	char tstr[OPTSTRING];
+
 	memset(options, 0, OPTSTRING);
 
 	if (txmsg_pass)
@@ -888,14 +890,22 @@ static void test_options(char *options)
 		strncat(options, "redir_noisy,", OPTSTRING);
 	if (txmsg_drop)
 		strncat(options, "drop,", OPTSTRING);
-	if (txmsg_apply)
-		strncat(options, "apply,", OPTSTRING);
-	if (txmsg_cork)
-		strncat(options, "cork,", OPTSTRING);
-	if (txmsg_start)
-		strncat(options, "start,", OPTSTRING);
-	if (txmsg_end)
-		strncat(options, "end,", OPTSTRING);
+	if (txmsg_apply) {
+		snprintf(tstr, OPTSTRING, "apply %d,", txmsg_apply);
+		strncat(options, tstr, OPTSTRING);
+	}
+	if (txmsg_cork) {
+		snprintf(tstr, OPTSTRING, "cork %d,", txmsg_cork);
+		strncat(options, tstr, OPTSTRING);
+	}
+	if (txmsg_start) {
+		snprintf(tstr, OPTSTRING, "start %d,", txmsg_start);
+		strncat(options, tstr, OPTSTRING);
+	}
+	if (txmsg_end) {
+		snprintf(tstr, OPTSTRING, "end %d,", txmsg_end);
+		strncat(options, tstr, OPTSTRING);
+	}
 	if (txmsg_ingress)
 		strncat(options, "ingress,", OPTSTRING);
 	if (txmsg_skb)
@@ -904,7 +914,7 @@ static void test_options(char *options)
 
 static int __test_exec(int cgrp, int test, struct sockmap_options *opt)
 {
-	char *options = calloc(60, sizeof(char));
+	char *options = calloc(OPTSTRING, sizeof(char));
 	int err;
 
 	if (test == SENDPAGE)
-- 
2.17.0


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Re: [PATCH bpf-next v4 0/5] fix test_sockmap

[Daniel Borkmann]

On 05/31/2018 06:42 AM, Prashant Bhole wrote:
> test_sockmap was originally written only to exercise kernel code
> paths, so there was no strict checking of errors. When the code was
> modified to run as selftests, due to lack of error handling it was not
> able to detect test failures.
> 
> In order to improve, this series fixes error handling, test run time
> and data verification.
> 
> Also slightly improved test output by printing parameter values (cork,
> apply, start, end) so that parameters for all tests are displayed.
> 
> Changes in v4:
>   - patch1: Ignore RX timoute error only for corked tests
>   - patch3: Setting different timeout for corked tests and reduce
>       run time by reducing number of iterations in some tests
> 
> Changes in v3:
>   - Skipped error checking for corked tests
> 
> Prashant Bhole (5):
>   selftests/bpf: test_sockmap, check test failure
>   selftests/bpf: test_sockmap, join cgroup in selftest mode
>   selftests/bpf: test_sockmap, timing improvements
>   selftests/bpf: test_sockmap, fix data verification
>   selftests/bpf: test_sockmap, print additional test options
> 
>  tools/testing/selftests/bpf/test_sockmap.c | 87 +++++++++++++++++-----
>  1 file changed, 67 insertions(+), 20 deletions(-)
> 

Applied to bpf-next, thanks Prashant!

[PATCH bpf-next v4 0/5] fix test_sockmap

[Daniel Borkmann]

On 05/31/2018 06:42 AM, Prashant Bhole wrote:
> test_sockmap was originally written only to exercise kernel code
> paths, so there was no strict checking of errors. When the code was
> modified to run as selftests, due to lack of error handling it was not
> able to detect test failures.
> 
> In order to improve, this series fixes error handling, test run time
> and data verification.
> 
> Also slightly improved test output by printing parameter values (cork,
> apply, start, end) so that parameters for all tests are displayed.
> 
> Changes in v4:
>   - patch1: Ignore RX timoute error only for corked tests
>   - patch3: Setting different timeout for corked tests and reduce
>       run time by reducing number of iterations in some tests
> 
> Changes in v3:
>   - Skipped error checking for corked tests
> 
> Prashant Bhole (5):
>   selftests/bpf: test_sockmap, check test failure
>   selftests/bpf: test_sockmap, join cgroup in selftest mode
>   selftests/bpf: test_sockmap, timing improvements
>   selftests/bpf: test_sockmap, fix data verification
>   selftests/bpf: test_sockmap, print additional test options
> 
>  tools/testing/selftests/bpf/test_sockmap.c | 87 +++++++++++++++++-----
>  1 file changed, 67 insertions(+), 20 deletions(-)
> 

Applied to bpf-next, thanks Prashant!
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[PATCH bpf-next v4 0/5] fix test_sockmap

[daniel]

On 05/31/2018 06:42 AM, Prashant Bhole wrote:
> test_sockmap was originally written only to exercise kernel code
> paths, so there was no strict checking of errors. When the code was
> modified to run as selftests, due to lack of error handling it was not
> able to detect test failures.
> 
> In order to improve, this series fixes error handling, test run time
> and data verification.
> 
> Also slightly improved test output by printing parameter values (cork,
> apply, start, end) so that parameters for all tests are displayed.
> 
> Changes in v4:
>   - patch1: Ignore RX timoute error only for corked tests
>   - patch3: Setting different timeout for corked tests and reduce
>       run time by reducing number of iterations in some tests
> 
> Changes in v3:
>   - Skipped error checking for corked tests
> 
> Prashant Bhole (5):
>   selftests/bpf: test_sockmap, check test failure
>   selftests/bpf: test_sockmap, join cgroup in selftest mode
>   selftests/bpf: test_sockmap, timing improvements
>   selftests/bpf: test_sockmap, fix data verification
>   selftests/bpf: test_sockmap, print additional test options
> 
>  tools/testing/selftests/bpf/test_sockmap.c | 87 +++++++++++++++++-----
>  1 file changed, 67 insertions(+), 20 deletions(-)
> 

Applied to bpf-next, thanks Prashant!
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