linux-toradex.git/include/linux/splice.h, branch v2.6.38.5

pipe: add support for shrinking and growing pipes

2010-05-21T19:12:40+00:00

This patch adds F_GETPIPE_SZ and F_SETPIPE_SZ fcntl() actions for
growing and shrinking the size of a pipe and adjusts pipe.c and splice.c
(and relay and network splice) usage to work with these larger (or smaller)
pipes.

Signed-off-by: Jens Axboe

splice: fix misleading comment

2009-05-12T09:11:48+00:00

Splice is tied to pipes by design, it'll not change. And now that
the splice stuff is in splice.h (and note pipe.h), the rest of the comment
is out-of-date as well.

Signed-off-by: Jens Axboe

ocfs2: fix i_mutex locking in ocfs2_splice_to_file()

2009-04-15T10:10:12+00:00

Rearrange locking of i_mutex on destination and call to
ocfs2_rw_lock() so locks are only held while buffers are copied with
the pipe_to_file() actor, and not while waiting for more data on the
pipe.

Signed-off-by: Miklos Szeredi 
Signed-off-by: Jens Axboe

splice: split up __splice_from_pipe()

2009-04-15T10:10:11+00:00

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 
Signed-off-by: Jens Axboe

[SPLICE]: Don't assume regular pages in splice_to_pipe()

2008-01-28T22:53:30+00:00

Allow caller to pass in a release function, there might be
other resources that need releasing as well. Needed for
network receive.

Signed-off-by: Jens Axboe 
Signed-off-by: David S. Miller

pipe: allow passing around of ops private pointer

2007-07-10T06:04:14+00:00

relay needs this for proper consumption handling, and the network
receive support needs it as well to lookup the sk_buff on pipe
release.

Signed-off-by: Jens Axboe

splice: divorce the splice structure/function definitions from the pipe header

2007-07-10T06:04:14+00:00

We need to move even more stuff into the header so that folks can use
the splice_to_pipe() implementation instead of open-coding a lot of
pipe knowledge (see relay implementation), so move to our own header
file finally.

Signed-off-by: Jens Axboe