The loop doesn't check for overflow of the event buffer, which can
easily happen if other tests are running in parallel (the bectl tests in
particular trigger devd events).
When that overflow occurs, a funny thing can happen: the loop ends up
trying to read 0 bytes from the socket, succeeds, and then prints its
buffer to stdout. It does this as fast as possible, eventually timing
out. Then, because kyua wants to log the test's output, it slurps the
output file into memory so that it can insert it into the test db. This
output file is quite large, usually around 8GB when I see it happen, and
is large enough to trigger an OOM kill in my test suite runner VM.
Fix the test: use a larger buffer and fail the test if we fill it before
both events are observed. Also don't print the output buffer on every
loop iteration, since unlike the seqpacket test that will just print the
same output over and over.
Reviewed by: imp, asomers
MFC after: 2 weeks
Sponsored by: Klara, Inc.
Differential Revision: https://reviews.freebsd.org/D47625
(cherry picked from commit 30cafaa9611d82525ab32ec32304b93835a5124a)
In case where the two events were being received in separate reads, the
event buffer was being null-terminated at the wrong offset.
Also, factored out some common code between the tests, and fixed a comment.
Submitted by: will
MFC after: 3 days
Sponsored by: Spectra Logic Corp
sbin/devd/tests/client_test.c
* In the event that popen fails, don't dereference its return value.
* Fix array overwrite in the stream and seqpacket tests.
* Close sockets at the end of successful ATF tests.
Reported by: Coverity scan
CID: 1232019, 1232020, 1232029, 1232030
MFC after: 1 week
Sponsored by: Spectra Logic
This change consists of two merges from projects/zfsd/head along with the
addition of an ATF test case for the new functionality.
sbin/devd/tests/Makefile
sbin/devd/tests/client_test.c
Add ATF test cases for reading events from both devd socket types.
r266519:
sbin/devd/devd.8
sbin/devd/devd.cc
Create a new socket, of type SOCK_SEQPACKET, for communicating with
clients. SOCK_SEQPACKET sockets preserve record boundaries,
simplying code in the client. The old SOCK_STREAM socket is retained
for backwards-compatibility with existing clients.
r269993:
sbin/devd/devd.8
Fix grammar bug.
CR: https://reviews.freebsd.org/rS266519
MFC after: 5 days
Sponsored by: Spectra Logic
