From: Nikolaus Rath <Nikolaus@rath.org>
Date: Thu, 14 Jan 2016 17:23:18 +0000 (-0800)
Subject: Extend write_buf documentation
X-Git-Tag: fuse-3.0.0pre0~66
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=773aa34dfc3c38b8d7988a18334eb611a47dccd7;p=qemu-gpiodev%2Flibfuse.git

Extend write_buf documentation
---

diff --git a/include/fuse_lowlevel.h b/include/fuse_lowlevel.h
index 3cc9db5..32908cb 100644
--- a/include/fuse_lowlevel.h
+++ b/include/fuse_lowlevel.h
@@ -932,6 +932,11 @@ struct fuse_lowlevel_ops {
 	 * kernel supports splicing from the fuse device, then the
 	 * data will be made available in pipe for supporting zero
 	 * copy data transfer.
+         *
+         * buf->count is guaranteed to be one (and thus buf->idx is
+         * always zero). The write_buf handler must ensure that
+         * bufv->off is correctly updated (reflecting the number of
+         * bytes read from bufv->buf[0]).
 	 *
 	 * Introduced in version 2.9
 	 *