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| author | Jens Axboe <jens.axboe@oracle.com> | 2010-05-20 10:43:18 +0200 |
|---|---|---|
| committer | Jens Axboe <jens.axboe@oracle.com> | 2010-05-21 21:12:40 +0200 |
| commit | 35f3d14dbbc58447c61e38a162ea10add6b31dc7 (patch) | |
| tree | 3e03cd540b7dcdac82195c4e76862c0ce6daaaf0 /include/linux/splice.h | |
| parent | 3d42b3612891baecf709d93f28655a6882a65d41 (diff) | |
| download | lwn-35f3d14dbbc58447c61e38a162ea10add6b31dc7.tar.gz lwn-35f3d14dbbc58447c61e38a162ea10add6b31dc7.zip | |
pipe: add support for shrinking and growing pipes
This patch adds F_GETPIPE_SZ and F_SETPIPE_SZ fcntl() actions for
growing and shrinking the size of a pipe and adjusts pipe.c and splice.c
(and relay and network splice) usage to work with these larger (or smaller)
pipes.
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
Diffstat (limited to 'include/linux/splice.h')
| -rw-r--r-- | include/linux/splice.h | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/include/linux/splice.h b/include/linux/splice.h index 18e7c7c0cae6..997c3b4c212b 100644 --- a/include/linux/splice.h +++ b/include/linux/splice.h @@ -82,4 +82,11 @@ extern ssize_t splice_to_pipe(struct pipe_inode_info *, extern ssize_t splice_direct_to_actor(struct file *, struct splice_desc *, splice_direct_actor *); +/* + * for dynamic pipe sizing + */ +extern int splice_grow_spd(struct pipe_inode_info *, struct splice_pipe_desc *); +extern void splice_shrink_spd(struct pipe_inode_info *, + struct splice_pipe_desc *); + #endif |