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authorJens Axboe <axboe@suse.de>2006-04-11 13:52:07 +0200
committerJens Axboe <axboe@suse.de>2006-04-11 13:52:07 +0200
commitb92ce55893745e011edae70830b8bc863be881f9 (patch)
treee2afd62d2e63d74157905140f5907d07bdfe31b9 /fs/pipe.c
parent529565dcb1581c9a1e3f6df1c1763ca3e0f0d512 (diff)
downloadop-kernel-dev-b92ce55893745e011edae70830b8bc863be881f9.zip
op-kernel-dev-b92ce55893745e011edae70830b8bc863be881f9.tar.gz
[PATCH] splice: add direct fd <-> fd splicing support
It's more efficient for sendfile() emulation. Basically we cache an internal private pipe and just use that as the intermediate area for pages. Direct splicing is not available from sys_splice(), it is only meant to be used for sendfile() emulation. Additional patch from Ingo Molnar to avoid the PIPE_BUFFERS loop at exit for the normal fast path. Signed-off-by: Jens Axboe <axboe@suse.de>
Diffstat (limited to 'fs/pipe.c')
-rw-r--r--fs/pipe.c10
1 files changed, 7 insertions, 3 deletions
diff --git a/fs/pipe.c b/fs/pipe.c
index 705b486..036536f 100644
--- a/fs/pipe.c
+++ b/fs/pipe.c
@@ -691,12 +691,10 @@ struct pipe_inode_info * alloc_pipe_info(struct inode *inode)
return info;
}
-void free_pipe_info(struct inode *inode)
+void __free_pipe_info(struct pipe_inode_info *info)
{
int i;
- struct pipe_inode_info *info = inode->i_pipe;
- inode->i_pipe = NULL;
for (i = 0; i < PIPE_BUFFERS; i++) {
struct pipe_buffer *buf = info->bufs + i;
if (buf->ops)
@@ -707,6 +705,12 @@ void free_pipe_info(struct inode *inode)
kfree(info);
}
+void free_pipe_info(struct inode *inode)
+{
+ __free_pipe_info(inode->i_pipe);
+ inode->i_pipe = NULL;
+}
+
static struct vfsmount *pipe_mnt __read_mostly;
static int pipefs_delete_dentry(struct dentry *dentry)
{
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