git: devfs - replace subname* with related* functions

[Alex Hornung <alexh@xxxxxxxxxxxxxxxxxxxxxxx>]

commit 72ea429e305598e883aecb86f6c9a1ae5ce07b4d
Author: Alex Hornung <ahornung@gmail.com>
Date:   Sun Jul 3 01:16:43 2011 +0100

    devfs - replace subname* with related* functions
    
     * Completely remove the subname* cruft that removed devices based on
       whether they started with a given string. This was used to remove,
       for example, all slices and partitions whenever a disk was removed.
       The issue with it was that it was solely based on name, so if one
       created for example two (unrelated) dm volumes, called "foo1" and
       "foo1234", then removing "foo1" would leave "foo1234" dangling.
    
     * Instead we introduce the concept of devices (cdevs) having parents:
       now the slices have the disk as their parent, and the partitions have
       the slice as their parents. The related* functions in devfs
       recursively deal with these relationships given a parent node.
    
     * This fix will be MFC'ed in a week or two if no issues pop up.

Summary of changes:
 sys/kern/subr_disk.c       |   18 +++++----
 sys/sys/conf.h             |    1 +
 sys/sys/devfs.h            |   14 ++++----
 sys/vfs/devfs/devfs_core.c |   79 ++++++++++++++++++++++++-------------------
 4 files changed, 62 insertions(+), 50 deletions(-)

http://gitweb.dragonflybsd.org/dragonfly.git/commitdiff/72ea429e305598e883aecb86f6c9a1ae5ce07b4d


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