linux-toradex.git/include/linux/splice.h, branch v4.8-rc1

fs/splice.c: remove unneeded exports

2014-06-12T04:21:11+00:00

ocfs2 was using a bunch of splice.c guts...

Signed-off-by: Al Viro

splice: fix unexpected size truncation

2014-01-28T05:02:40+00:00

@splice_desc.total_len is 32 bit(unsigned int) which is used to store the
size passed from userspace which is 64 bit(size_t) so that the size is
unexpectedly truncated

That means vmsplice can not work if the size passed from userspace is >=
4G, for example, we noticed in vmsplice, splice-reader does not do
anything and splice-writer is waiting for available buffer forever if the
size is 4G

Fix it by extending @splice_desc.total_len to 64 bits as well

Signed-off-by: Xiao Guangrong 
Cc: Jens Axboe 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

splice: don't pass the address of ->f_pos to methods

2013-06-20T15:02:45+00:00

Signed-off-by: Al Viro

splice: fix racy pipe->buffers uses

2012-06-13T19:16:42+00:00

Dave Jones reported a kernel BUG at mm/slub.c:3474! triggered
by splice_shrink_spd() called from vmsplice_to_pipe()

commit 35f3d14dbbc5 (pipe: add support for shrinking and growing pipes)
added capability to adjust pipe->buffers.

Problem is some paths don't hold pipe mutex and assume pipe->buffers
doesn't change for their duration.

Fix this by adding nr_pages_max field in struct splice_pipe_desc, and
use it in place of pipe->buffers where appropriate.

splice_shrink_spd() loses its struct pipe_inode_info argument.

Reported-by: Dave Jones 
Signed-off-by: Eric Dumazet 
Cc: Jens Axboe 
Cc: Alexander Viro 
Cc: Tom Herbert 
Cc: stable  # 2.6.35
Tested-by: Dave Jones 
Signed-off-by: Jens Axboe

tmpfs: clone shmem_file_splice_read()

2011-07-26T03:57:11+00:00

Copy __generic_file_splice_read() and generic_file_splice_read() from
fs/splice.c to shmem_file_splice_read() in mm/shmem.c.  Make
page_cache_pipe_buf_ops and spd_release_page() accessible to it.

Signed-off-by: Hugh Dickins 
Cc: Jens Axboe 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

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