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[libvirt] [PATCH] LXC: create directory /dev/shm automatically

Now we mount /dev as tmpfs and haven't created directory
/dev/shm,so the glibc api such as shm_open/sem_open will
create files under dir /dev.(since /dev is mounted as tmpfs)

Through these api still useable in container,but this cause
directory /dev looks a little chaos.

This patch create directory /dev/shm automatically,the files
created by shm_open/sem_open will stay in this directroy.

Signed-off-by: Gao feng <gaofeng cn fujitsu com>
 src/lxc/lxc_container.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/src/lxc/lxc_container.c b/src/lxc/lxc_container.c
index 497539c..5150564 100644
--- a/src/lxc/lxc_container.c
+++ b/src/lxc/lxc_container.c
@@ -586,6 +586,13 @@ static int lxcContainerMountBasicFS(bool pivotRoot,
                                  "devfs", "/dev", "tmpfs", opts);
             goto cleanup;
+        VIR_DEBUG("create directory /dev/shm for POSIX shared memory and named semphore");
+        if (virFileMakePath("/dev/shm") < 0) {
+            virReportSystemError(errno, "%s",
+                                 _("Failed to mkdir /dev/shm"));
+            goto cleanup;
+        }
     rc = 0;

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