tree 2264092a285ab6af01f5f86d2cf06d2068546d37
parent 91e463c8f5f7a5b09d3d034c01a88567af60c504
author Miklos Szeredi <miklos@szeredi.hu> 1239731316 +0200
committer Jens Axboe <jens.axboe@oracle.com> 1239790211 +0200

splice: split up __splice_from_pipe()

Split up __splice_from_pipe() into four helper functions:

  splice_from_pipe_begin()
  splice_from_pipe_next()
  splice_from_pipe_feed()
  splice_from_pipe_end()

splice_from_pipe_next() will wait (if necessary) for more buffers to
be added to the pipe.  splice_from_pipe_feed() will feed the buffers
to the supplied actor and return when there's no more data available
(or if all of the requested data has been copied).

This is necessary so that implementations can do locking around the
non-waiting splice_from_pipe_feed().

This patch should not cause any change in behavior.

Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>