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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 /fs/fcntl.c
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 'fs/fcntl.c')
-rw-r--r--fs/fcntl.c5
1 files changed, 5 insertions, 0 deletions
diff --git a/fs/fcntl.c b/fs/fcntl.c
index 452d02f..bcba9603 100644
--- a/fs/fcntl.c
+++ b/fs/fcntl.c
@@ -14,6 +14,7 @@
#include <linux/dnotify.h>
#include <linux/slab.h>
#include <linux/module.h>
+#include <linux/pipe_fs_i.h>
#include <linux/security.h>
#include <linux/ptrace.h>
#include <linux/signal.h>
@@ -412,6 +413,10 @@ static long do_fcntl(int fd, unsigned int cmd, unsigned long arg,
case F_NOTIFY:
err = fcntl_dirnotify(fd, filp, arg);
break;
+ case F_SETPIPE_SZ:
+ case F_GETPIPE_SZ:
+ err = pipe_fcntl(filp, cmd, arg);
+ break;
default:
break;
}
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