[Xen-changelog] [qemu-xen-3.4-testing] replace stat("/etc/disable-guest-log-throttle") in xen_platform.c

[Ian Jackson <Ian.Jackson@xxxxxxxxxxxxx>]

commit 7465aec799f459aacf685e3394b1775a5619f508
Author: Ian Jackson <ian.jackson@xxxxxxxxxxxxx>
Date:   Thu May 28 18:24:49 2009 +0100

    replace stat("/etc/disable-guest-log-throttle") in xen_platform.c
    
    currently xen_platform reads /etc/disable-guest-log-throttle at boot to
    decide whether is going to throttle guest logging or not.
    When using stubdom this is the only code in qemu that rely on
    fs-backend, apart from saving and loading the statefile for migration.
    This patch removes the read from /etc and adds a read from xenstore
    instead.
    
    Signed-off-by: Stefano Stabellini <stefano.stabellini@xxxxxxxxxxxxx>
    (cherry picked from commit e17ca57cf5e6d4c6d11eccca7daee853915a6eff)
---
 hw/xen_platform.c |    9 +++++++--
 1 files changed, 7 insertions(+), 2 deletions(-)

diff --git a/hw/xen_platform.c b/hw/xen_platform.c
index 9827e3f..36610a4 100644
--- a/hw/xen_platform.c
+++ b/hw/xen_platform.c
@@ -276,6 +276,8 @@ static int platform_fixed_ioport_load(QEMUFile *f, void 
*opaque, int version_id)
 void platform_fixed_ioport_init(void)
 {
     struct stat stbuf;
+    char *throttling;
+    int len = 1;
 
     register_savevm("platform_fixed_ioport", 0, 1, platform_fixed_ioport_save,
                     platform_fixed_ioport_load, NULL);
@@ -286,8 +288,11 @@ void platform_fixed_ioport_init(void)
     register_ioport_read(0x10, 16, 2, platform_fixed_ioport_read2, NULL);
     register_ioport_read(0x10, 16, 1, platform_fixed_ioport_read1, NULL);
 
-    if (stat("/etc/disable-guest-log-throttle", &stbuf) == 0)
-        throttling_disabled = 1;
+    throttling = xenstore_vm_read(domid, "log-throttling", &len);
+    if (throttling != NULL) {
+        throttling_disabled = (throttling[0] - '0');
+        free(throttling);
+    }
 
     platform_fixed_ioport_write1(NULL, 0x10, 0);
 }
--
generated by git-patchbot for /home/xen/git/qemu-xen-3.4-testing.git

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