Re: [PATCH] qemu-xen: do not use pipe with stubdom

[Boris Derzhavets <bderzhavets@yahoo.com>]

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Patch applied in Xen Unstable & Suse's 2.6.27-5 env . 
First start fs-backend

root@ServerXen331:~# /usr/sbin/fs-backend &
[1] 6548
root@ServerXen331:~# Path changed backend/vfs/exports/requests
Awaiting next connection.
Path changed backend/vfs/exports/requests/2/0/frontend
Handling connection from dom=2, for export=0
Frontend found at: /local/domain/2/device/vfs/0 (gref=1789, evtchn=5)
Awaiting next connection.
Awaiting next connection.
Backend consumed: 0 requests
Pushed responces and notify=0
Path changed backend/vfs/exports/requests/2/0/frontend
Awaiting next connection.
terminate_mount_request /local/domain/2/device/vfs/0
free_mount_request /local/domain/2/device/vfs/0
Awaiting next connection.
Path changed backend/vfs/exports/requests/3/0/frontend
Handling connection from dom=3, for export=0
Frontend found at: /local/domain/3/device/vfs/0 (gref=1789, evtchn=5)
Awaiting next connection.
Awaiting next connection.
Backend consumed: 0 requests
Pushed responces and notify=0
Path changed backend/vfs/exports/requests/3/0/frontend
Awaiting next connection.
terminate_mount_request /local/domain/3/device/vfs/0
free_mount_request /local/domain/3/device/vfs/0
Awaiting next connection.

Next in an other terminal :-

root@ServerXen331:/etc/xen# cat RHELhvm-dm
kernel = "/usr/lib/xen/boot/ioemu-stubdom.gz"
vif = [ ' ', 'bridge=eth0']
# vfb = [ 'type=sdl' ]
vfb = [ 'type=vnc' ]
disk = ['phy:/dev/loop0,hdc:cdrom,r','phy:/dev/sdb8,hda,w']

root@ServerXen331:/etc/xen# cat RHELhvm-stubdom
kernel = "/usr/lib/xen/boot/hvmloader"
builder='hvm'
memory =1024
name = "RHELhvm"
vif = [ 'type=ioemu, bridge=eth0' ]
device_model = "/usr/lib/xen/bin/stubdom-dm"
boot="d"
sdl=0
opengl=0
vnc=0
stdvga=0

root@ServerXen331:/etc/xen# xm create RHELhvm-stubdom
Using config file "./RHELhvm-stubdom".
Started domain RHELhvm (id=11)

root@ServerXen331:/etc/xen# xm list

Name                                        ID   Mem VCPUs      State   Time(s)
Domain-0                                    0  6922     2            r-----     99.5
RHELhvm                                 11  1024     1             ------      0.0

root@ServerXen331:/etc/xen# netstat -a|grep 590
tcp        0      0 *:5901                  *:*                     LISTEN     
unix  2      [ ACC ]     STREAM     LISTENING     18590    /tmp/seahorse-bvfLoE/S.gpg-agent
unix  3      [ ]         STREAM     CONNECTED     19590    @/dbus-vfs-daemon/socket-lDpa7MVy

Boris

--- On Mon, 3/23/09, Stefano Stabellini <stefano.stabellini@eu.citrix.com> wrote:
From: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
Subject: [Xen-devel] [PATCH] qemu-xen: do not use pipe with stubdom
To: "xen-devel" <xen-devel@lists.xensource.com>
Date: Monday, March 23, 2009, 12:29 PM

This patch allows stubdoms to start after the recent merge.

Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>

diff --git a/vl.c b/vl.c
index 9b9f7d5..a5361fd 100644
--- a/vl.c
+++ b/vl.c
@@ -1773,7 +1773,7 @@ static int init_timer_alarm(void)
     struct qemu_alarm_timer *t = NULL;
     int i, err = -1;
 
-#ifndef _WIN32
+#if !defined(_WIN32) && !defined(CONFIG_STUBDOM)
     int fds[2];
 
     err = pipe(fds);
@@ -1805,7 +1805,7 @@ static int init_timer_alarm(void)
         goto fail;
     }
 
-#ifndef _WIN32
+#if !defined(_WIN32) && !defined(CONFIG_STUBDOM)
     qemu_set_fd_handler2(alarm_timer_rfd, NULL,
                          try_to_rearm_timer, NULL, t);
 #endif
@@ -1815,7 +1815,7 @@ static int init_timer_alarm(void)
     return 0;
 
 fail:
-#ifndef _WIN32
+#if !defined(_WIN32) && !defined(CONFIG_STUBDOM)
     close(fds[0]);
     close(fds[1]);
 #endif

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