diff options
| author | David Howells <dhowells@redhat.com> | 2023-06-07 19:19:09 +0100 |
|---|---|---|
| committer | Jakub Kicinski <kuba@kernel.org> | 2023-06-08 19:40:30 -0700 |
| commit | 2dc334f1a63a8839b88483a3e73c0f27c9c1791c (patch) | |
| tree | b23b85a3637baa98d8d44c0a4652a7db1dc18f96 /include/linux/splice.h | |
| parent | 81840b3b91aad06053ad2712f3da5d0448eeb0e8 (diff) | |
splice, net: Use sendmsg(MSG_SPLICE_PAGES) rather than ->sendpage()
Replace generic_splice_sendpage() + splice_from_pipe + pipe_to_sendpage()
with a net-specific handler, splice_to_socket(), that calls sendmsg() with
MSG_SPLICE_PAGES set instead of calling ->sendpage().
MSG_MORE is used to indicate if the sendmsg() is expected to be followed
with more data.
This allows multiple pipe-buffer pages to be passed in a single call in a
BVEC iterator, allowing the processing to be pushed down to a loop in the
protocol driver. This helps pave the way for passing multipage folios down
too.
Protocols that haven't been converted to handle MSG_SPLICE_PAGES yet should
just ignore it and do a normal sendmsg() for now - although that may be a
bit slower as it may copy everything.
Signed-off-by: David Howells <dhowells@redhat.com>
Reviewed-by: Jakub Kicinski <kuba@kernel.org>
cc: Jens Axboe <axboe@kernel.dk>
cc: Matthew Wilcox <willy@infradead.org>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Diffstat (limited to 'include/linux/splice.h')
| -rw-r--r-- | include/linux/splice.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/include/linux/splice.h b/include/linux/splice.h index a55179fd60fc..991ae318b6eb 100644 --- a/include/linux/splice.h +++ b/include/linux/splice.h @@ -84,6 +84,8 @@ extern long do_splice(struct file *in, loff_t *off_in, extern long do_tee(struct file *in, struct file *out, size_t len, unsigned int flags); +extern ssize_t splice_to_socket(struct pipe_inode_info *pipe, struct file *out, + loff_t *ppos, size_t len, unsigned int flags); /* * for dynamic pipe sizing |