[RAUC] Failed to mount seed slot

[Ladislav Michl <ladis@linux-mips.org>]

Hi there,

I'm using rauc with casync to update target system - it is symmetric rootfsA,
rootfsB, scenario, so slots are defined as:
[slot.rootfs.0]
device=/dev/ubi0_0
type=ubifs
bootname=system0

[slot.rootfs.1]
device=/dev/ubi0_1
type=ubifs
bootname=system1

Now system is booted with rootfs mounted read only which makes mounting seed
slot fail:
rauc[871]: Mounting /dev/ubi0_0 to use as seed
rauc[871]: launching subprocess: mount -t ubifs /dev/ubi0_0 /run/rauc/rootfs.0
rauc[871]: posix_spawn avoided (fd close requested) (child_setup specified) 
rauc[871]: mount: /run/rauc/rootfs.0: /dev/ubi0_0 already mounted or mount point busy.

Here adding '-o ro' would quick fix it up (but break rw case, as options have to
match), so it seems better to use bind mount as comment casync_extract_image
function suggests, but do not see it code.

Am I missing anything?

Thank you,
	ladis

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