[PATCH 0/2] Fixes for logging tests - dev - passt

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[PATCH 0/2] Fixes for logging tests

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David Gibson

24 Apr 2024 24 Apr '24

6:29 a.m.

Here's a fix for a spurious test failure in the logging tests, along with a trivial cleanup. David Gibson (2): test: Slight simplification to pasta log tests test: Make log truncation test more robust test/pasta_options/log_to_file | 11 ++++------- 1 file changed, 4 insertions(+), 7 deletions(-) -- 2.44.0

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David Gibson

24 Apr 24 Apr

6:29 a.m.

New subject: [PATCH 1/2] test: Slight simplification to pasta log tests

test/pasta_options/log_to_file contains a couple of rudimentary tests where we start pasta with an interactive shell, then immediately exit it. We can achieve the same thing by using /bin/true as the command to pasta. This also means that waiting for pasta to start, waiting for the executed command to complete and for pasta to clean up are all handled by simply waiting for pasta to complete in the foreground, so there's no need for an additional sleep. Signed-off-by: David Gibson --- test/pasta_options/log_to_file | 8 ++------ 1 file changed, 2 insertions(+), 6 deletions(-) diff --git a/test/pasta_options/log_to_file b/test/pasta_options/log_to_file index fcdd5538..f1002167 100644 --- a/test/pasta_options/log_to_file +++ b/test/pasta_options/log_to_file @@ -33,15 +33,11 @@ test Log creation set PORTS -t 10001,10002 -u 10001,10002 set LOG_FILE __STATEDIR__/pasta.log -passt ./pasta -l __LOG_FILE__ -passtb exit -sleep 1 +passt ./pasta -l __LOG_FILE__ -- /bin/true check [ -s __LOG_FILE__ ] test Log truncated on creation -passt ./pasta -l __LOG_FILE__ -passtb exit -sleep 1 +passt ./pasta -l __LOG_FILE__ -- /bin/true check [ $(cat __LOG_FILE__ | wc -l) -eq 1 ] test Maximum log size -- 2.44.0

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David Gibson

6:30 a.m.

New subject: [PATCH 2/2] test: Make log truncation test more robust

test/pasta_options/log_to_file checks that pasta truncates its log file when started. It does that by starting pasta with a log file once, then starting it again and checking that after the second round, the log file has only one line: the startup banner from the second invocation. However, this test will break if the second invocation logs any additional messages at startup. This can easily happen on a host with multiple network interfaces due to the "Multiple default route" informational messages added in 639fdf06e ("netlink: Fix selection of template interface"). I believe it could also happen on a host without IPv6 connectivity due to the "Couldn't pick external interface" messages, though I haven't confirmed this. Make the log file test more robust, by not testing for a single line, but instead explicitly testing for the PID of the second pasta invocation in the banner line. Link: https://bugs.passt.top/show_bug.cgi?id=88 Signed-off-by: David Gibson --- test/pasta_options/log_to_file | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/test/pasta_options/log_to_file b/test/pasta_options/log_to_file index f1002167..fe50e50b 100644 --- a/test/pasta_options/log_to_file +++ b/test/pasta_options/log_to_file @@ -37,8 +37,9 @@ passt ./pasta -l __LOG_FILE__ -- /bin/true check [ -s __LOG_FILE__ ] test Log truncated on creation -passt ./pasta -l __LOG_FILE__ -- /bin/true -check [ $(cat __LOG_FILE__ | wc -l) -eq 1 ] +passt ./pasta -l __LOG_FILE__ -- /bin/true & wait +pout PID2 echo $! +check head -1 __LOG_FILE__ | grep '^pasta .* [(]__PID2__[)]$' test Maximum log size passtb ./pasta --config-net -d -f -l __LOG_FILE__ --log-size $((100 * 1024)) -- sh -c 'while true; do tcp_crr --nolog -P 10001 -C 10002 -6; done' -- 2.44.0

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Stefano Brivio

25 Apr 25 Apr

12:01 a.m.

New subject: [PATCH 2/2] test: Make log truncation test more robust

On Wed, 24 Apr 2024 14:30:00 +1000 David Gibson wrote:

test/pasta_options/log_to_file checks that pasta truncates its log file when started. It does that by starting pasta with a log file once, then starting it again and checking that after the second round, the log file has only one line: the startup banner from the second invocation.

However, this test will break if the second invocation logs any additional messages at startup. This can easily happen on a host with multiple network interfaces due to the "Multiple default route" informational messages added in 639fdf06e ("netlink: Fix selection of template interface"). I believe it could also happen on a host without IPv6 connectivity due to the "Couldn't pick external interface" messages, though I haven't confirmed this.

Make the log file test more robust, by not testing for a single line, but instead explicitly testing for the PID of the second pasta invocation in the banner line.

Link: https://bugs.passt.top/show_bug.cgi?id=88

Signed-off-by: David Gibson --- test/pasta_options/log_to_file | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/test/pasta_options/log_to_file b/test/pasta_options/log_to_file index f1002167..fe50e50b 100644 --- a/test/pasta_options/log_to_file +++ b/test/pasta_options/log_to_file @@ -37,8 +37,9 @@ passt ./pasta -l __LOG_FILE__ -- /bin/true check [ -s __LOG_FILE__ ]

test Log truncated on creation -passt ./pasta -l __LOG_FILE__ -- /bin/true -check [ $(cat __LOG_FILE__ | wc -l) -eq 1 ] +passt ./pasta -l __LOG_FILE__ -- /bin/true & wait +pout PID2 echo $! +check head -1 __LOG_FILE__ | grep '^pasta .* [(]__PID2__[)]$' ^^^^^^^^^^^^^^

I'm mildly amused that this actually works. :) -- Stefano

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Stefano Brivio

12:02 a.m.

On Wed, 24 Apr 2024 14:29:58 +1000 David Gibson wrote:

Here's a fix for a spurious test failure in the logging tests, along with a trivial cleanup.

David Gibson (2): test: Slight simplification to pasta log tests test: Make log truncation test more robust

Applied. -- Stefano

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