git: DEVFS - Modification of clone behaviour; general cleanup; xtime

[Alex Hornung]

commit 07dfa375a25f4ef43c956ee33c739661306f6019
Author: Alex Hornung <ahornung at gmail.com>
Date:   Mon Aug 10 20:18:03 2009 +0100

    DEVFS - Modification of clone behaviour; general cleanup; xtime
    
    * Use default_dev_ops by default for make_autoclone_dev so that opens
      and other operations on it fail when it fails as a clone handler.
    
    * Accept NULL as argument for bimtap for make_autoclone_dev, so that
      there's no explicit need for a clone bitmap to use this function.
    
    * Add destroy_autoclone_dev as a counterpart to make_autoclone_dev.
    
    * Const-ify a bunch of char *
    
    * Use kstrdup instead of kmalloc + memcpy magic at a few places where
      this makes sense.
    
    * Rework atime/mtime/ctime as advised by Simon Schubert on IRC.
    
    * Clean up devfs_clone by getting rid of old code and return NULL
      if cloning fails, else return the cloned device.
    
    * Sync up all pending devfs operations just before calling into the
      clone handler, so that issues with device deletion/creation are
      dealt with appropriately.
    
    * Change cloning in devfs_spec_open to match devfs_clone changes and
      also check the return value of devfs_create_device_node, as it can
      return NULL. If cloning fails, the cloning device will be opened,
      which will have the default_ops and hence will fail returning
      ENODEV.
    
    * Cosmetic changes
    
    Suggested-By: Simon "corecode" Schubert

Summary of changes:
 sys/kern/kern_conf.c        |   26 +++++++++++--
 sys/sys/device.h            |   20 ++++++-----
 sys/vfs/devfs/devfs.h       |   52 +++++++++++++-------------
 sys/vfs/devfs/devfs_core.c  |   84 ++++++++++++++++++------------------------
 sys/vfs/devfs/devfs_vnops.c |   75 ++++++++++++++++++++++++--------------
 5 files changed, 142 insertions(+), 115 deletions(-)

http://gitweb.dragonflybsd.org/dragonfly.git/commitdiff/07dfa375a25f4ef43c956ee33c739661306f6019


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