similar to: Can some help me about "xenstore-write"?

Hi : As I want to know the information of the VMs that currently runing on the same physical machine, I''d like to get those VM''s information from xenstore, such as macaddress. Indeed, what I want is IP address, so, if guest can write things to xenstore, I''d like it write its IP address into xenstore and let domain0 reads it directly. So, can anybody tell me whether a PV

After a few times of building xen by source, I can''t start domU anyway. I tried "yum erase xen kernel-xen" and "yum install xen kernel-xen" again, but the problem is still exist. There are xenstore-write errors in /var/log/xen/xen-hotplug.log: xenstore-write: could not write path backend/vbd/1/2050/hotplug-error xenstore-write: could not write path

Hi All , I am using xen 3.2.0 which i have built form source ,I could initially boot Dom 0 and some DomUs. But today when i tried to boot a DomU with birdge enabled it didnt work giving an error .... Error: Device 0 (vif) could not be connected. Hotplug scripts not working. After that I checked my var/log/messages and It gave lots of xenstore-write

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Xen Security Advisory XSA-57 version 3 libxl allows guest write access to sensitive console related xenstore keys UPDATES IN VERSION 3 ==================== Public release. ISSUE DESCRIPTION ================= The libxenlight (libxl) toolstack library does not correctly set permissions on

Package: xcp-xapi Version: 1.3.2-6 Severity: important Tags: upstream xe vm-memory-target-set does not write new target to /local/domain/ID/memory/target. Balloon in guest domain is expecting this value to be changed to do selfballooning. This breaks 'dynamic memory control' feature. Steps to reproduce: 1) Setup any PV virtual machine with static-memory-min < static-memory-max 2)

# HG changeset patch # User Ian Campbell <ian.campbell@citrix.com> # Date 1297182367 0 # Node ID a46b91cd8202726aecd9ddefd8e75faff48144d6 # Parent deaa7bc1a7ff6cfad7865394cb8b7205741004c9 libxl: allow guest to write "control/shutdown" xenstore node. The PV shutdown/reboot/suspend protocol requires that the guest acknowledge a request by clearing the node therefore it is necessary

Frontends are expected to write their protocol ABI to xenstore. Since the protocol ABI defaults to the backend's native ABI, things work fine without that as long as the frontend's native ABI is identical to the backend's native ABI. This is not the case for xen-blkfront running 32-on-64, because its ABI differs between 32 and 64 bit, and thus needs this fix. Based on

Frontends are expected to write their protocol ABI to xenstore. Since the protocol ABI defaults to the backend's native ABI, things work fine without that as long as the frontend's native ABI is identical to the backend's native ABI. This is not the case for xen-blkfront running 32-on-64, because its ABI differs between 32 and 64 bit, and thus needs this fix. Based on

I''m looking for what I need to write to xenstore from a VM to say whether or not it supports migration and/or suspension. On older versions of NetBSD, suspend/migration isn''t supported and on newer versions it still has issues. Therefore I want to let the XenServer toolstack, etc. not offer the option to the end user. -- Stephen

Hello, I build and installed Xen (4.1.3) from source, and I think I have got it working. Well, almost. I am using unmodified kernel of Fedora16 as my dom0 kernel. So this is what happened. I am able to boot into Xen, but the "xl info" failed with the standard error message mentioned in the tutorial. "libxl: error: libxl.c:56:libxl_ctx_init Is xenstore daemon running? failed to

Hello, I build and installed Xen (4.1.3) from source, and I think I have got it working. Well, almost. I am using unmodified kernel of Fedora16 as my dom0 kernel. So this is what happened. I am able to boot into Xen, but the "xl info" failed with the standard error message mentioned in the tutorial. "libxl: error: libxl.c:56:libxl_ctx_init Is xenstore daemon running? failed to

Signed-off-by: Matthew Daley <mattjd@gmail.com> --- tools/xenstore/xenstore_client.c | 15 +++++++++++---- 1 file changed, 11 insertions(+), 4 deletions(-) diff --git a/tools/xenstore/xenstore_client.c b/tools/xenstore/xenstore_client.c index 3ac214b..996ee64 100644 --- a/tools/xenstore/xenstore_client.c +++ b/tools/xenstore/xenstore_client.c @@ -134,8 +134,13 @@ static void do_ls(struct

Hello, I''ve modified tools/xenstore/xenstore_client.c to include a new utility, xenstore-chmod. This utility permits developers and administrators to manually change the permissions on arbitrary locations in XenStore from the command line. This is often helpful if you''re trying to debug an application that relies on XenStore and is encountering difficulties with permissions.

tail /var/log/xen/xen-hotplug.log xenstore-read: couldn't read path backend/vbd/6/768/node /etc/xen/scripts/xen-hotplug-cleanup: line 24: [: !=: unary operator expected /etc/xen/scripts/xen-hotplug-cleanup: line 24: [: !=: unary operator expected xenstore-read: couldn't read path backend/vbd/6/5632/node xenstore-read: couldn't read path backend/vbd/6/768/node

Hi,     I use follow code get xenstore ring and event channel, then i wrapped writing and reading function to operate it ,but it came to oops:     struct xenstore_domain_interface {     char req[XENSTORE_RING_SIZE]; /* Requests to xenstore daemon. */     char rsp[XENSTORE_RING_SIZE]; /* Replies and async watch events. */     XENSTORE_RING_IDX req_cons, req_prod;     XENSTORE_RING_IDX rsp_cons,

Daniel P. Berrange wrote: > On Wed, Mar 30, 2016 at 10:53:45AM +0200, Marin Bek wrote: >> Hi, >> >> is it possible to access xenstore through libvirt? Or at least any other >> programatic means other than calling xenstore-read/write through shell? >> >> I understand it is somewhat of a security risk but still... > > No, we don't expose this kind of

Hello, I noticed a strace delay when running "virsh list" on my Xen-4.1.3 test server. On further investigation I noticed that in XenStore there were multiple /vm/$UUID entries suffixed by -$VERSION, especially I hat 16 entries for my dom0. For each reboot of the host I get a new entry. After disabling Xend I get the following output after a reboot: > root at xen5:~# xenstore-ls

Hello, I noticed a strace delay when running "virsh list" on my Xen-4.1.3 test server. On further investigation I noticed that in XenStore there were multiple /vm/$UUID entries suffixed by -$VERSION, especially I hat 16 entries for my dom0. For each reboot of the host I get a new entry. After disabling Xend I get the following output after a reboot: > root at xen5:~# xenstore-ls

Hey, I am new to Xen. Recently I have some problems about using xenstore to setup communication between Dom 0 and Dom U. I have successfully installed Xen on Centos 6 and launch a Dom U with Centos 5. "xm" and "virsh" works fine on my machine. I can also use comments for xenstore to access values in Dom 0, such as xenstore-list, xenstore-read, and xenstore-write. But I

The attached patches enable the xenstore client utilities (xenstore-read/write and friends) to be built statically and against uclibc. This is useful for utility domains where a small userspace is desired. Both static building with glibc and linking with uclibc seem to have problems with threading and so the static version of the library is built without thread support. This is OK since none of