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| author | Jens Axboe <axboe@suse.de> | 2006-03-30 15:15:30 +0200 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2006-03-30 12:28:18 -0800 |
| commit | 5274f052e7b3dbd81935772eb551dfd0325dfa9d (patch) | |
| tree | c79f813ec513660edb6f1e4a75cb366c6b84f53f /net/socket.c | |
| parent | 5d4fe2c1ce83c3e967ccc1ba3d580c1a5603a866 (diff) | |
| download | lwn-5274f052e7b3dbd81935772eb551dfd0325dfa9d.tar.gz lwn-5274f052e7b3dbd81935772eb551dfd0325dfa9d.zip | |
[PATCH] Introduce sys_splice() system call
This adds support for the sys_splice system call. Using a pipe as a
transport, it can connect to files or sockets (latter as output only).
From the splice.c comments:
"splice": joining two ropes together by interweaving their strands.
This is the "extended pipe" functionality, where a pipe is used as
an arbitrary in-memory buffer. Think of a pipe as a small kernel
buffer that you can use to transfer data from one end to the other.
The traditional unix read/write is extended with a "splice()" operation
that transfers data buffers to or from a pipe buffer.
Named by Larry McVoy, original implementation from Linus, extended by
Jens to support splicing to files and fixing the initial implementation
bugs.
Signed-off-by: Jens Axboe <axboe@suse.de>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'net/socket.c')
| -rw-r--r-- | net/socket.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/net/socket.c b/net/socket.c index fcd77eac0ccf..b13042f68c02 100644 --- a/net/socket.c +++ b/net/socket.c @@ -119,6 +119,9 @@ static ssize_t sock_writev(struct file *file, const struct iovec *vector, static ssize_t sock_sendpage(struct file *file, struct page *page, int offset, size_t size, loff_t *ppos, int more); +extern ssize_t generic_splice_sendpage(struct inode *inode, struct file *out, + size_t len, unsigned int flags); + /* * Socket files have a set of 'special' operations as well as the generic file ones. These don't appear @@ -141,7 +144,8 @@ static struct file_operations socket_file_ops = { .fasync = sock_fasync, .readv = sock_readv, .writev = sock_writev, - .sendpage = sock_sendpage + .sendpage = sock_sendpage, + .splice_write = generic_splice_sendpage, }; /* |