[LTP] [PATCH] syscalls/mq_open: fix limits for queues_max
Xiao Yang
yangx.jy@cn.fujitsu.com
Mon Feb 6 13:42:10 CET 2017
This case fails on RHEL6.8GA and RHEL6.9Beta, because setting
queues_max to 0 is invalid. the minimum value of queues_max
has been limitted to 1 on some distributions, Please see the
following kernel commit:
commit 5b5c4d1a1440e94994c73dddbad7be0676cd8b9a
Author: Doug Ledford <dledford@redhat.com>
Date: Thu May 31 16:26:30 2012 -0700
ipc/mqueue: update maximums for the mqueue subsystem
We set queues_max to 1 instead of 0, so this case can work on RHEL6.
Signed-off-by: Xiao Yang <yangx.jy@cn.fujitsu.com>
---
testcases/kernel/syscalls/mq_open/mq_open01.c | 14 +++++++++++++-
1 file changed, 13 insertions(+), 1 deletion(-)
diff --git a/testcases/kernel/syscalls/mq_open/mq_open01.c b/testcases/kernel/syscalls/mq_open/mq_open01.c
index d6f7196..caffaf5 100644
--- a/testcases/kernel/syscalls/mq_open/mq_open01.c
+++ b/testcases/kernel/syscalls/mq_open/mq_open01.c
@@ -28,6 +28,7 @@
#include "tst_test.h"
#define QUEUE_NAME "/test_mqueue"
+#define QUEUE_INIT "/init_mqueue"
static uid_t euid;
static struct passwd *pw;
@@ -35,6 +36,7 @@ static char *qname;
static struct rlimit rlim;
static mqd_t fd, fd2;
+static mqd_t fd3 = -1;
static int max_queues;
struct test_case {
@@ -174,7 +176,7 @@ static void unlink_queue(void)
static void set_max_queues(void)
{
SAFE_FILE_SCANF(PROC_MAX_QUEUES, "%d", &max_queues);
- SAFE_FILE_PRINTF(PROC_MAX_QUEUES, "%d", 0);
+ SAFE_FILE_PRINTF(PROC_MAX_QUEUES, "%d", 1);
SAFE_SETEUID(pw->pw_uid);
}
@@ -206,6 +208,10 @@ static void setup(void)
euid = geteuid();
pw = SAFE_GETPWNAM("nobody");
SAFE_GETRLIMIT(RLIMIT_NOFILE, &rlim);
+
+ fd3 = mq_open(QUEUE_INIT, O_CREAT | O_EXCL | O_RDWR, S_IRWXU, NULL);
+ if (fd3 == -1)
+ tst_brk(TBROK | TERRNO, "mq_open(%s) failed", QUEUE_INIT);
}
static void cleanup(void)
@@ -216,6 +222,12 @@ static void cleanup(void)
if (fd2 > 0)
mq_close(fd2);
+ if (fd3 > 0 && mq_close(fd3))
+ tst_res(TWARN | TERRNO, "mq_close(%s) failed", QUEUE_INIT);
+
+ if (mq_unlink(QUEUE_INIT))
+ tst_res(TWARN | TERRNO, "mq_unlink(%s) failed", QUEUE_INIT);
+
mq_unlink(qname);
}
--
1.8.3.1
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