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authorJens Axboe <jens.axboe@oracle.com>2010-05-20 10:43:18 +0200
committerJens Axboe <jens.axboe@oracle.com>2010-05-21 21:12:40 +0200
commit35f3d14dbbc58447c61e38a162ea10add6b31dc7 (patch)
tree3e03cd540b7dcdac82195c4e76862c0ce6daaaf0 /include/linux/fcntl.h
parent3d42b3612891baecf709d93f28655a6882a65d41 (diff)
downloadop-kernel-dev-35f3d14dbbc58447c61e38a162ea10add6b31dc7.zip
op-kernel-dev-35f3d14dbbc58447c61e38a162ea10add6b31dc7.tar.gz
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/fcntl.h')
-rw-r--r--include/linux/fcntl.h6
1 files changed, 6 insertions, 0 deletions
diff --git a/include/linux/fcntl.h b/include/linux/fcntl.h
index 8603740..afc00af 100644
--- a/include/linux/fcntl.h
+++ b/include/linux/fcntl.h
@@ -22,6 +22,12 @@
#define F_NOTIFY (F_LINUX_SPECIFIC_BASE+2)
/*
+ * Set and get of pipe page size array
+ */
+#define F_SETPIPE_SZ (F_LINUX_SPECIFIC_BASE + 7)
+#define F_GETPIPE_SZ (F_LINUX_SPECIFIC_BASE + 8)
+
+/*
* Types of directory notifications that may be requested.
*/
#define DN_ACCESS 0x00000001 /* File accessed */
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