tests: add test for using ring after a forked child exits.
This case was recently broken in kernel commit 41be53e94fb0 and
repaired in 8e5c66c485a8. As it's trivial to test...
Signed-off-by: Andres Freund <andres@anarazel.de>
diff --git a/test/across-fork.c b/test/across-fork.c
index 14ee93a..009fe52 100644
--- a/test/across-fork.c
+++ b/test/across-fork.c
@@ -220,6 +220,13 @@
if (wait_cqe(&shmem->ring, "p cqe 2"))
goto errcleanup;
+ /* check that IO can still be submitted after child exited */
+ if (submit_write(&shmem->ring, shared_fd, "parent: write shared fd after child exit\n", 0))
+ goto errcleanup;
+
+ if (wait_cqe(&shmem->ring, "p cqe 3"))
+ goto errcleanup;
+
break;
}
case 0: {
@@ -260,7 +267,8 @@
if (verify_file(tmpdir, "shared",
"before fork: write shared fd\n"
"parent: write shared fd\n"
- "child: write shared fd\n") ||
+ "child: write shared fd\n"
+ "parent: write shared fd after child exit\n") ||
verify_file(tmpdir, "parent1", "parent: write parent fd 1\n") ||
verify_file(tmpdir, "parent2", "parent: write parent fd 2\n") ||
verify_file(tmpdir, "child", "child: write child fd\n"))
