Mark Fasheh 08bf1fea79 dlm: Give fs/dlm the notion of ranges ...

Using the new interval tree code we add a tree for each lock status list to
efficiently track ranged requests. Internally, most operations on a
resources lock status list (granted, waiting, converting) then are turned
into operations within a given range.

There is no API change other than a new call, dlm_lock_range() and a new
structure, 'struct dlm_key' to define our range endpoints. Keys can have
arbitrary lengths and are compared via memcmp. A ranged blocking ast type is
defined so that users of dlm_lock_range() can know which range they are
blocking.

A rudimentary test, dlmtest.ko is included.

TODO:
 - Update userspace entry points, need to add one for new lock call
 - Manage backwards compatibility with network protocol

Signed-off-by: Mark Fasheh <mfasheh@versity.com>

2017-06-23 15:07:10 -05:00

kmod

dlm: Give fs/dlm the notion of ranges

2017-06-23 15:07:10 -05:00

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