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test/ipc_namespace: set random values less that IPCMNI for *mni sysctls

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There are a few patches in linux-next, which added this check:
    ipc: IPCMNI limit check for semmni
    ipc: IPCMNI limit check for msgmni and shmmni

Signed-off-by: Andrei Vagin <avagin@gmail.com>
This commit is contained in:
Andrei Vagin 2018-10-15 19:22:33 +03:00
parent c487ad187a
commit de62bf764c
1 changed files with 7 additions and 6 deletions
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13
test/zdtm/static/ipc_namespace.c
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@ -7,6 +7,7 @@
#include <linux/sem.h>
#include <linux/shm.h>
#include <fcntl.h>
#include <limits.h>
#include "zdtmtst.h"
@ -237,6 +238,8 @@ static int rand_ipc_sysctl(char *name, unsigned int val)
return 0;
}
#define MAX_MNI (1<<15)
static int rand_ipc_sem(void)
{
int fd;
@ -249,8 +252,8 @@ static int rand_ipc_sem(void)
pr_perror("Can't open %s", name);
return fd;
}
sprintf(buf, "%d %d %d %d\n", (unsigned)lrand48(), (unsigned)lrand48(),
(unsigned)lrand48(), (unsigned)lrand48());
sprintf(buf, "%d %d %d %d\n", (unsigned) lrand48(), (unsigned) lrand48(),
(unsigned) lrand48(), (unsigned) lrand48() % MAX_MNI);
ret = write(fd, buf, 128);
if (ret < 0) {
pr_perror("Can't write %s: %d", name, errno);
@ -260,8 +263,6 @@ static int rand_ipc_sem(void)
return 0;
}
#define INT_MAX ((int)(~0U>>1))
static int rand_ipc_ns(void)
{
int ret;
@ -272,7 +273,7 @@ static int rand_ipc_ns(void)
if (!ret)
ret = rand_ipc_sysctl("/proc/sys/kernel/msgmnb", (unsigned)lrand48());
if (!ret)
ret = rand_ipc_sysctl("/proc/sys/kernel/msgmni", (unsigned)lrand48());
ret = rand_ipc_sysctl("/proc/sys/kernel/msgmni", (unsigned)lrand48() % MAX_MNI);
if (!ret)
ret = rand_ipc_sysctl("/proc/sys/kernel/auto_msgmni", 0);
if (!ret && (unsigned)lrand48() % 2)
@ -286,7 +287,7 @@ static int rand_ipc_ns(void)
if (!ret)
ret = rand_ipc_sysctl("/proc/sys/kernel/shmall", (unsigned)lrand48());
if (!ret)
ret = rand_ipc_sysctl("/proc/sys/kernel/shmmni", (unsigned)lrand48());
ret = rand_ipc_sysctl("/proc/sys/kernel/shmmni", (unsigned)lrand48() % MAX_MNI);
if (!ret)
ret = rand_ipc_sysctl("/proc/sys/kernel/shm_rmid_forced", (unsigned)lrand48() & 1);