tree b944b46d3856948931160c8a75ee27be3417c515
parent 29ce20586be54ceba49c55ae049541398cd2c416
author Jens Axboe <jens.axboe@oracle.com> 1184328703 +0200
committer Jens Axboe <jens.axboe@oracle.com> 1184328871 +0200

splice: fix offset mangling with direct splicing (sendfile)

If the output actor doesn't transfer the full amount of data, we will
increment ppos too much. Two related bugs in there:

- We need to break out and return actor() retval if it is shorted than
  what we spliced into the pipe.

- Adjust ppos only according to actor() return.

Also fix loop problem in generic_file_splice_read(), it should not keep
going when data has already been transferred.

Signed-off-by: Jens Axboe <jens.axboe@oracle.com>