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authorIngo Molnar <mingo@elte.hu>2006-04-10 09:18:35 -0400
committerJens Axboe <axboe@suse.de>2006-04-10 09:18:35 -0400
commit3a326a2ce88e71d00ac0d133e314a3342a7709f8 (patch)
tree3a3cf55be19311c04d195e37baec9f49c4015b18 /include/linux/pipe_fs_i.h
parent0b749ce3802428007a37870eb51ba3c0bdf90857 (diff)
[PATCH] introduce a "kernel-internal pipe object" abstraction
separate out the 'internal pipe object' abstraction, and make it usable to splice. This cleans up and fixes several aspects of the internal splice APIs and the pipe code: - pipes: the allocation and freeing of pipe_inode_info is now more symmetric and more streamlined with existing kernel practices. - splice: small micro-optimization: less pointer dereferencing in splice methods Signed-off-by: Ingo Molnar <mingo@elte.hu> Update XFS for the ->splice_read/->splice_write changes. Signed-off-by: Jens Axboe <axboe@suse.de>
Diffstat (limited to 'include/linux/pipe_fs_i.h')
-rw-r--r--include/linux/pipe_fs_i.h7
1 files changed, 4 insertions, 3 deletions
diff --git a/include/linux/pipe_fs_i.h b/include/linux/pipe_fs_i.h
index ec384958d509..9cf99cb34c15 100644
--- a/include/linux/pipe_fs_i.h
+++ b/include/linux/pipe_fs_i.h
@@ -36,6 +36,7 @@ struct pipe_inode_info {
36 unsigned int w_counter; 36 unsigned int w_counter;
37 struct fasync_struct *fasync_readers; 37 struct fasync_struct *fasync_readers;
38 struct fasync_struct *fasync_writers; 38 struct fasync_struct *fasync_writers;
39 struct inode *inode;
39}; 40};
40 41
41/* Differs from PIPE_BUF in that PIPE_SIZE is the length of the actual 42/* Differs from PIPE_BUF in that PIPE_SIZE is the length of the actual
@@ -53,10 +54,10 @@ struct pipe_inode_info {
53#define PIPE_FASYNC_WRITERS(inode) (&((inode).i_pipe->fasync_writers)) 54#define PIPE_FASYNC_WRITERS(inode) (&((inode).i_pipe->fasync_writers))
54 55
55/* Drop the inode semaphore and wait for a pipe event, atomically */ 56/* Drop the inode semaphore and wait for a pipe event, atomically */
56void pipe_wait(struct inode * inode); 57void pipe_wait(struct pipe_inode_info *pipe);
57 58
58struct inode* pipe_new(struct inode* inode); 59struct pipe_inode_info * alloc_pipe_info(struct inode * inode);
59void free_pipe_info(struct inode* inode); 60void free_pipe_info(struct inode * inode);
60 61
61/* 62/*
62 * splice is tied to pipes as a transport (at least for now), so we'll just 63 * splice is tied to pipes as a transport (at least for now), so we'll just