git: sbin/hammer: Abort if a device is used for more than one volumes

[Tomohiro Kusumi]

commit 06acdb69d31b793b62338342b7d448d520c0ed89
Author: Tomohiro Kusumi <kusumi.tomohiro at gmail.com>
Date:   Sun Jun 14 13:22:56 2015 +0900

    sbin/hammer: Abort if a device is used for more than one volumes
    
    - setup_volume() needs to check if the device has already been
      registered, in addition to checking the volume id. If it's been
      registered already, abort the process before writes to volumes
      start. Otherwise using a single device for more than one volumes
      hits assertion at some point on blockmap lookup of layer1/2
      bigblocks with possible core dump. It should abort before any
      ondisk change (when the function is used by newfs_hammer) occurs.
    
      # /sbin/newfs_hammer -L TEST /dev/da3 /dev/da3 /dev/da3
      Volume 0 DEVICE /dev/da3        size 465.76GB
      newfs_hammer: setup_volume: /dev/da3: Specified more than once

Summary of changes:
 sbin/hammer/ondisk.c | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

http://gitweb.dragonflybsd.org/dragonfly.git/commitdiff/06acdb69d31b793b62338342b7d448d520c0ed89


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