change order of commands in usr.sbin/jail/jail.c

[Robert Schulze]

Dear readers,

I would like to propose a change to the order of commands that get run 
on jail startup and stop.
The current running order on start is (shortened):

...
IP_MOUNT,
IP__MOUNT_FROM_FSTAB,
IP_MOUNT_DEVFS,
IP_MOUNT_FDESCFS,
IP_EXEC_PRESTART,
...

on stop:
...
IP_EXEC_POSTSTOP,
IP_MOUNT_FDESCFS,
IP_MOUNT_DEVFS,
IP__MOUNT_FROM_FSTAB,
IP_MOUNT,
...

Wouldn't it be closer to the docs when IP_EXEC_PRESTART would be 
executed before IP_MOUNT on startup and IP_EXEC_POSTSTOP after IP_MOUNT 
on stop?

I have been bitten by this because I want to create md-devices and mount 
them as jail's root before startup (via exec.prestart), but jail(8) 
bails out trying to mount devfs into the non-existing jail filesystem, 
just because MOUNT_DEVFS is called before IP_EXEC_PRESTART.

with kind regards,
Robert Schulze

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