git: sbin/newfs_hammer: Don't assume blkdev is /dev/da...

[Tomohiro Kusumi]

commit 2b708458b62c87ab5fd69155351c949ed1d58b84
Author: Tomohiro Kusumi <kusumi.tomohiro at gmail.com>
Date:   Fri Jul 15 00:17:41 2016 +0900

    sbin/newfs_hammer: Don't assume blkdev is /dev/da...
    
    newfs_hammer has "/dev/da..." hardcoded in its TRIM support,
    as TRIM sysctls exist only for physical disks.
    
    newfs_hammer should detect non physical block devices such as
    device mapper or loopback devices, before it calls sysctl(3),
    so as not to print an error message like below.
    
     # newfs_hammer -E -L TEST /dev/mapper/linear1
     Volume 0 DEVICE /dev/mapper/linear1 size 465.66TB
     DEVICE /dev/mapper/linear1 (kern.cam.da.pper/linear1.trim_enabled) does not support the TRIM command
                                             ^^^^^^^^^^^^
     usage: newfs_hammer -L label [-Ef] [-b bootsize] [-m savesize] [-u undosize]
                         [-V version] special ...

Summary of changes:
 sbin/newfs_hammer/newfs_hammer.c | 7 +++++++
 1 file changed, 7 insertions(+)

http://gitweb.dragonflybsd.org/dragonfly.git/commitdiff/2b708458b62c87ab5fd69155351c949ed1d58b84


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