ping. // hongzhi
On 2018年03月06日 18:54, Hongzhi.Song wrote:
Issue: mkfs.ext4 </dev/storage-device-name> fails, prompting that the device is in use by the system. But there is no mounted infomation in /proc/mounts. Reproduce: Be sure that there is storage device connected to you machine. Boot the machine. root@intel-x86-64:~# mkfs.ext4 /dev/mmcblk0p1 mke2fs 1.43.5 (04-Aug-2017) /dev/mmcblk0p1 contains a ext2 file system last mounted on / on Tue Jan 9 05:24:36 2018 Proceed anyway? (y,N) y /dev/mmcblk0p1 is apparently in use by the system; will not make a filesystem here! root@intel-x86-64:~# fdisk -l ... Disk /dev/mmcblk0: 58.2 GiB, 62537072640 bytes, 122142720 sectors Units: sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disklabel type: dos Disk identifier: 0xe62c8fcc Device Boot Start End Sectors Size Id Type /dev/mmcblk0p1 2048 122142719 122140672 58.2G 83 Linux ... root@intel-x86-64:~#cat /proc/mounts ... cgroup /sys/fs/cgroup/blkio cgroup rw,nosuid,nodev,noexec,relatime,blkio 0 0 mqueue /dev/mqueue mqueue rw,relatime 0 0 debugfs /sys/kernel/debug debugfs rw,relatime 0 0 tmpfs /tmp tmpfs rw,nosuid,nodev 0 0 hugetlbfs /dev/hugepages hugetlbfs rw,relatime 0 0 tmpfs /var/volatile tmpfs rw,relatime 0 0 tmpfs /run/user/0 tmpfs rw,nosuid,nodev,relatime,size=688048k,mode=700 0 0 Description: If linux uses systemd as init, systemd-udevd.service sets MountFlags=slave, which is essentially a sandboxing setting: it detaches mount() operations done within the service from the rest of the system. This means that, outside of namespace of systemd-udev, we can not access device mounted by udev and some operation will be failed.(e.g. mkfs.ext4 /dev/sda1). Current automount.rules and mount.sh created for sysvinit is unable to solve above problems. This patch adds systemd-mount in /etc/udev/script/mount.sh. The tool recommended by systemd upstream generally is the best way in particular in embedded applications to deal with hotpluggable media. Systemd-mount request the mount operation to be executed by PID 1, and hence outside of the mount context of udev. Signed-off-by: Hongzhi.Song <hongzhi.s...@windriver.com> --- meta/recipes-core/udev/udev-extraconf/mount.sh | 61 +++++++++++++++++++++++--- 1 file changed, 56 insertions(+), 5 deletions(-) diff --git a/meta/recipes-core/udev/udev-extraconf/mount.sh b/meta/recipes-core/udev/udev-extraconf/mount.sh index d760328..2fa2925 100644 --- a/meta/recipes-core/udev/udev-extraconf/mount.sh +++ b/meta/recipes-core/udev/udev-extraconf/mount.sh @@ -5,9 +5,28 @@ # Attempt to mount any added block devices and umount any removed devices-MOUNT="/bin/mount"+BASE_INIT="`readlink "/sbin/init"`" +INIT_SYSTEMD="/lib/systemd/systemd" + +if [ "x$BASE_INIT" = "x$INIT_SYSTEMD" ];then + # systemd as init uses systemd-mount to mount block devices + MOUNT="/usr/bin/systemd-mount" + UMOUNT="/usr/bin/systemd-umount" + + if [ -x $MOUNT ] && [ -x $UMOUNT ]; + then + logger "Using systemd-mount to finish mount" + else + logger "Linux init is using systemd, so please install systemd-mount to finish mount" + exit 1 + fi +else + MOUNT="/bin/mount" + UMOUNT="/bin/umount" +fi + PMOUNT="/usr/bin/pmount" -UMOUNT="/bin/umount" + for line in `grep -h -v ^# /etc/udev/mount.blacklist /etc/udev/mount.blacklist.d/*` do if [ ` expr match "$DEVNAME" "$line" ` -gt 0 ]; @@ -17,6 +36,34 @@ do fi done+automount_systemd() {+ name="`basename "$DEVNAME"`" + + ! test -d "/run/media/$name" && mkdir -p "/run/media/$name" + + MOUNT="$MOUNT -o silent" + + # If filesystemtype is vfat, change the ownership group to 'disk', and + # grant it with w/r/x permissions. + case $ID_FS_TYPE in + vfat|fat) + MOUNT="$MOUNT -o umask=007,gid=`awk -F':' '/^disk/{print $3}' /etc/group`" + ;; + # TODO + *) + ;; + esac + + if ! $MOUNT --no-block -t auto $DEVNAME "/run/media/$name" + then + #logger "mount.sh/automount" "$MOUNT -t auto $DEVNAME \"/run/media/$name\" failed!" + rm_dir "/run/media/$name" + else + logger "mount.sh/automount" "Auto-mount of [/run/media/$name] successful" + touch "/tmp/.automount-$name" + fi +} + automount() { name="`basename "$DEVNAME"`"@@ -72,9 +119,13 @@ if [ "$ACTION" = "add" ] && [ -n "$DEVNAME" ] && [ -n "$ID_FS_TYPE" -o "$media_t# If the device isn't mounted at this point, it isn't # configured in fstab (note the root filesystem can show up as # /dev/root in /proc/mounts, so check the device number too) - if expr $MAJOR "*" 256 + $MINOR != `stat -c %d /`; then - grep -q "^$DEVNAME " /proc/mounts || automount - fi + if expr $MAJOR "*" 256 + $MINOR != `stat -c %d /`; then + if [ "`basename $MOUNT`" = "systemd-mount" ];then + grep -q "^$DEVNAME " /proc/mounts || automount_systemd + else + grep -q "^$DEVNAME " /proc/mounts || automount + fi + fi fi
-- _______________________________________________ Openembedded-core mailing list Openembedded-core@lists.openembedded.org http://lists.openembedded.org/mailman/listinfo/openembedded-core
