[src/trunk]: src/sys/miscfs/syncfs Add sysctl options for the syncer:

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

details:   https://anonhg.NetBSD.org/src/rev/1a95a9dee0c3
branches:  trunk
changeset: 584220:1a95a9dee0c3
user:      xtraeme <xtraeme%NetBSD.org@localhost>
date:      Sun Sep 11 17:55:56 2005 +0000

description:
Add sysctl options for the syncer:

vfs.sync.delay: max time to delay syncing data
vfs.sync.filedelay: time to delay syncing files
vfs.sync.dirdelay: time to delay syncing directories
vfs.sync.metadelay: time to delay syncing metadata

Note that using a value of 0 is allowed, but it's not
recommended.

diffstat:

 sys/miscfs/syncfs/sync_subr.c |  51 +++++++++++++++++++++++++++++++++++++++++-
 1 files changed, 49 insertions(+), 2 deletions(-)

diffs (72 lines):

diff -r d0f9b4e993c5 -r 1a95a9dee0c3 sys/miscfs/syncfs/sync_subr.c
--- a/sys/miscfs/syncfs/sync_subr.c     Sun Sep 11 17:55:26 2005 +0000
+++ b/sys/miscfs/syncfs/sync_subr.c     Sun Sep 11 17:55:56 2005 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: sync_subr.c,v 1.18 2005/05/30 22:13:50 christos Exp $  */
+/*     $NetBSD: sync_subr.c,v 1.19 2005/09/11 17:55:56 xtraeme Exp $   */
 
 /*
  * Copyright 1997 Marshall Kirk McKusick. All Rights Reserved.
@@ -32,10 +32,11 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: sync_subr.c,v 1.18 2005/05/30 22:13:50 christos Exp $");
+__KERNEL_RCSID(0, "$NetBSD: sync_subr.c,v 1.19 2005/09/11 17:55:56 xtraeme Exp $");
 
 #include <sys/param.h>
 #include <sys/systm.h>
+#include <sys/sysctl.h>
 #include <sys/kernel.h>
 #include <sys/proc.h>
 #include <sys/mount.h>
@@ -262,3 +263,49 @@
        stat_rush_requests += 1;
        return (1);
 }
+
+SYSCTL_SETUP(sysctl_vfs_syncfs_setup, "sysctl vfs.sync subtree setup")
+{
+       const struct sysctlnode *rnode, *cnode;
+        
+       sysctl_createv(clog, 0, NULL, &rnode,
+                       CTLFLAG_PERMANENT,
+                       CTLTYPE_NODE, "vfs", NULL,
+                       NULL, 0, NULL, 0,
+                       CTL_VFS, CTL_EOL);
+
+       sysctl_createv(clog, 0, &rnode, &rnode,
+                       CTLFLAG_PERMANENT,
+                       CTLTYPE_NODE, "sync",
+                       SYSCTL_DESCR("syncer options"),
+                       NULL, 0, NULL, 0,
+                       CTL_CREATE, CTL_EOL);
+
+       sysctl_createv(clog, 0, &rnode, &cnode,
+                       CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
+                       CTLTYPE_INT, "delay",
+                       SYSCTL_DESCR("max time to delay syncing data"),
+                       NULL, 0, &syncdelay, 0,
+                       CTL_CREATE, CTL_EOL);
+
+       sysctl_createv(clog, 0, &rnode, &cnode,
+                       CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
+                       CTLTYPE_INT, "filedelay",
+                       SYSCTL_DESCR("time to delay syncing files"),
+                       NULL, 0, &filedelay, 0,
+                       CTL_CREATE, CTL_EOL);
+
+       sysctl_createv(clog, 0, &rnode, &cnode,
+                       CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
+                       CTLTYPE_INT, "dirdelay",
+                       SYSCTL_DESCR("time to delay syncing directories"),
+                       NULL, 0, &dirdelay, 0,
+                       CTL_CREATE, CTL_EOL);
+
+       sysctl_createv(clog, 0, &rnode, &cnode,
+                       CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
+                       CTLTYPE_INT, "metadelay",
+                       SYSCTL_DESCR("time to delay syncing metadata"),
+                       NULL, 0, &metadelay, 0,
+                       CTL_CREATE, CTL_EOL);
+}