• Linus Torvalds's avatar
    Merge tag 'for-4.20/dm-changes' of... · 71f4d95b
    Linus Torvalds authored
    Merge tag 'for-4.20/dm-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm
    
    Pull device mapper updates from Mike Snitzer:
    
     - The biggest change this cycle is to remove support for the legacy IO
       path (.request_fn) from request-based DM.
    
       Jens has already started preparing for complete removal of the legacy
       IO path in 4.21 but this earlier removal of support from DM has been
       coordinated with Jens (as evidenced by the commit being attributed to
       him).
    
       Making request-based DM exclussively blk-mq only cleans up that
       portion of DM core quite nicely.
    
     - Convert the thinp and zoned targets over to using refcount_t where
       applicable.
    
     - A couple fixes to the DM zoned target for refcounting and other races
       buried in the implementation of metadata block creation and use.
    
     - Small cleanups to remove redundant unlikely() around a couple
       WARN_ON_ONCE().
    
     - Simplify how dm-ioctl copies from userspace, eliminating some
       potential for a malicious user trying to change the executed ioctl
       after its processing has begun.
    
     - Tweaked DM crypt target to use the DM device name when naming the
       various workqueues created for a particular DM crypt device (makes
       the N workqueues for a DM crypt device more easily understood and
       enhances user's accounting capabilities at a glance via "ps")
    
     - Small fixup to remove dead branch in DM writecache's memory_entry().
    
    * tag 'for-4.20/dm-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm:
      dm writecache: remove disabled code in memory_entry()
      dm zoned: fix various dmz_get_mblock() issues
      dm zoned: fix metadata block ref counting
      dm raid: avoid bitmap with raid4/5/6 journal device
      dm crypt: make workqueue names device-specific
      dm: add dm_table_device_name()
      dm ioctl: harden copy_params()'s copy_from_user() from malicious users
      dm: remove unnecessary unlikely() around WARN_ON_ONCE()
      dm zoned: target: use refcount_t for dm zoned reference counters
      dm thin: use refcount_t for thin_c reference counting
      dm table: require that request-based DM be layered on blk-mq devices
      dm: rename DM_TYPE_MQ_REQUEST_BASED to DM_TYPE_REQUEST_BASED
      dm: remove legacy request-based IO path
    71f4d95b
device-mapper.h 17.4 KB