From: Zbigniew Jędrzejewski-Szmek Date: Sun, 16 Sep 2012 12:58:51 +0000 (+0200) Subject: nspawn: mount tmpfs on /dev/shm X-Git-Tag: v190~74 X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?p=elogind.git;a=commitdiff_plain;h=ede89845a49c735fa9e8a04bd80f6e94ea84aeb9;ds=sidebyside nspawn: mount tmpfs on /dev/shm Most things seem to function fine without /dev/shm, but it is expected to be there (quoting linux/Documentation/filesystems/tmpfs.txt: glibc 2.2 and above expects tmpfs to be mounted at /dev/shm for POSIX shared memory (shm_open, shm_unlink)). Since /tmp/ is already mounted as tmpfs, it would be enough to mkdir /tmp/shm and chmod it. Mounting it separately has the advantage that it can be easily remounted to change the quota. --- diff --git a/src/nspawn/nspawn.c b/src/nspawn/nspawn.c index 7f084ef2d..770019bb8 100644 --- a/src/nspawn/nspawn.c +++ b/src/nspawn/nspawn.c @@ -273,6 +273,7 @@ static int mount_all(const char *dest) { { "sysfs", "/sys", "sysfs", NULL, MS_RDONLY|MS_NOSUID|MS_NOEXEC|MS_NODEV, true }, { "tmpfs", "/dev", "tmpfs", "mode=755", MS_NOSUID|MS_STRICTATIME, true }, { "/dev/pts", "/dev/pts", NULL, NULL, MS_BIND, true }, + { "tmpfs", "/dev/shm", "tmpfs", "mode=1777", MS_NOSUID|MS_NODEV|MS_STRICTATIME, true }, { "tmpfs", "/run", "tmpfs", "mode=755", MS_NOSUID|MS_NODEV|MS_STRICTATIME, true }, #ifdef HAVE_SELINUX { "/sys/fs/selinux", "/sys/fs/selinux", NULL, NULL, MS_BIND, false }, /* Bind mount first */