From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Subject: [PATCH RFC 3/3] splice: add support of splicing to packetized pipe From: Stanislav Kinsburskiy To: linux-fsdevel@vger.kernel.org, viro@zeniv.linux.org.uk, linux-kernel@vger.kernel.org Cc: criu@openvz.org, skinsbursky@virtuozzo.com Date: Tue, 15 Dec 2015 21:29:12 +0400 Message-ID: <20151215172912.16355.90422.stgit@localhost.localdomain> In-Reply-To: <20151215172356.16355.29361.stgit@localhost.localdomain> References: <20151215172356.16355.29361.stgit@localhost.localdomain> MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: This patch uses SPLICE_F_PACKET as a flag, representing packetized pipe. In splice_to_pipe() this flag is converted into PIPE_BUF_FLAG_PACKET on pipe buffer. Signed-off-by: Stanislav Kinsburskiy --- fs/splice.c | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/fs/splice.c b/fs/splice.c index 4cf700d..d698fb2 100644 --- a/fs/splice.c +++ b/fs/splice.c @@ -210,6 +210,8 @@ ssize_t splice_to_pipe(struct pipe_inode_info *pipe, buf->ops = spd->ops; if (spd->flags & SPLICE_F_GIFT) buf->flags |= PIPE_BUF_FLAG_GIFT; + if (spd->flags & SPLICE_F_PACKET) + buf->flags |= PIPE_BUF_FLAG_PACKET; pipe->nrbufs++; page_nr++; @@ -1420,6 +1422,9 @@ static long do_splice(struct file *in, loff_t __user *off_in, offset = in->f_pos; } + if (is_packetized(out)) + flags |= SPLICE_F_PACKET; + ret = do_splice_to(in, &offset, opipe, len, flags); if (!off_in) @@ -1609,6 +1614,9 @@ static long vmsplice_to_pipe(struct file *file, const struct iovec __user *iov, if (splice_grow_spd(pipe, &spd)) return -ENOMEM; + if (is_packetized(file)) + spd.flags |= SPLICE_F_PACKET; + spd.nr_pages = get_iovec_page_array(iov, nr_segs, spd.pages, spd.partial, false, spd.nr_pages_max);