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| author | Max Krummenacher <max.krummenacher@toradex.com> | 2021-02-24 19:19:48 +0100 |
|---|---|---|
| committer | Max Krummenacher <max.krummenacher@toradex.com> | 2021-03-03 13:26:23 +0000 |
| commit | c8651feae915eeac23510565dde0f64557696de7 (patch) | |
| tree | fe53d8f6617ffc69ff4de6194792efda65a5e8c5 | |
| parent | a4f005089d9c286fa33f4fb5f2e41f1a0ee614d6 (diff) | |
udev: mount.sh: create a symlink to the partition with the bootfiles
Add to the mount.sh script code which creates a symlink to partition
with the bootfiles if that can be guessed from the rootfs partition.
Scan the /proc/cmdline for the rootfs partition. If this is the second
partition of a block device and a first partition exists it creates
the symlink /dev/boot-part.
/etc/fstab consumes the symlink to mount that at /boot.
Signed-off-by: Max Krummenacher <max.krummenacher@toradex.com>
| -rw-r--r-- | recipes-core/udev/files/mount.sh | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/recipes-core/udev/files/mount.sh b/recipes-core/udev/files/mount.sh index 323458d..e179ec4 100644 --- a/recipes-core/udev/files/mount.sh +++ b/recipes-core/udev/files/mount.sh @@ -4,6 +4,25 @@ # # Attempt to mount any added block devices and umount any removed devices +# By default we boot from a block device the BSP uses the first partition to +# store the files used by U-Boot, aka. the bootfs. The second partition of the +# same block device then contains the rootfs. +# Read the PARTUUID of the rootfs from /proc/cmdline, check if that device +# exists and then assume that the first partition on that device is the one +# with the bootpartion on it. +# Symlink that partition to /dev/boot-part, that then gets mounted to /boot, +# compare with /etc/fstab. + +# expects 'root=PARTUUID=fe6beb3d-02' in /proc/cmdline + +BASEUUID=$(sed 's/root=\([^[:space:]]*\).*/\1/ ; s/PARTUUID=\([0-9a-f]*\)-02/\1/' /proc/cmdline) +if [ -b /dev/disk/by-partuuid/${BASEUUID}-02 ]; then + BOOTPART=$(readlink -f /dev/disk/by-partuuid/${BASEUUID}-01) + if [ x$DEVNAME = x$BOOTPART ]; then + logger "$0 creating symlink" + ln -sf $BOOTPART /dev/boot-part + fi +fi MOUNT="/bin/mount" PMOUNT="/usr/bin/pmount" |