[src/trunk]: src/usr.sbin/perfused Interm hack raising buffers for /dev/fuse ...

[manu <manu%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/1c7df9e8d580
branches:  trunk
changeset: 757985:1c7df9e8d580
user:      manu <manu%NetBSD.org@localhost>
date:      Mon Oct 11 01:12:25 2010 +0000

description:
Interm hack raising buffers for /dev/fuse socket used in the filesystem.
This works around read(2) system callsfailing with ENOBUFS.

This is a hack bedause there is no way to know that 4 * FUSE_BUFSIZE
will be enough to hold queued FUSE frames. It seems good enough at
mine.

diffstat:

 usr.sbin/perfused/msg.c |  11 ++++++-----
 1 files changed, 6 insertions(+), 5 deletions(-)

diffs (29 lines):

diff -r f6e9fcd56271 -r 1c7df9e8d580 usr.sbin/perfused/msg.c
--- a/usr.sbin/perfused/msg.c   Mon Oct 11 01:08:26 2010 +0000
+++ b/usr.sbin/perfused/msg.c   Mon Oct 11 01:12:25 2010 +0000
@@ -1,4 +1,4 @@
-/*  $NetBSD: msg.c,v 1.7 2010/09/20 06:45:38 manu Exp $ */
+/*  $NetBSD: msg.c,v 1.8 2010/10/11 01:12:25 manu Exp $ */
 
 /*-
  *  Copyright (c) 2010 Emmanuel Dreyfus. All rights reserved.
@@ -68,14 +68,15 @@
        (void)strcpy(sun.sun_path, _PATH_FUSE); 
 
        /*
-        * Set a buffer lentgh large enough so that any FUSE packet
-        * will fit.
+        * Set a buffer lentgh large enough so that a few FUSE packets
+        * will fit. 
+        * XXX We will have to find how many packets we need
         */
-       opt = FUSE_BUFSIZE;
+       opt = 4 * FUSE_BUFSIZE;
        if (setsockopt(s, SOL_SOCKET, SO_SNDBUF, &opt, sizeof(opt)) != 0)
                DWARN("%s: setsockopt SO_SNDBUF to %d failed", __func__, opt);
 
-       opt = FUSE_BUFSIZE;
+       opt = 4 * FUSE_BUFSIZE;
        if (setsockopt(s, SOL_SOCKET, SO_RCVBUF, &opt, sizeof(opt)) != 0)
                DWARN("%s: setsockopt SO_RCVBUF to %d failed", __func__, opt);