CentOS7 complains that 'ret' might be unused, and indeed this is the case for
`xl psr-hwinfo --cat`.
The logic for selecting which information to print was rather awkward.
Introduce a new 'all' which default to true, and is cleared if specific
options are selected. This allows for a far more clear logic when choosing
whether to print information or not.
Signed-off-by: Andrew Cooper <andrew.cooper3@citrix.com>
CC: Ian Campbell <Ian.Campbell@citrix.com>
CC: Ian Jackson <Ian.Jackson@eu.citrix.com>
CC: Wei Liu <wei.liu2@citrix.com>
CC: Chao Peng <chao.p.peng@linux.intel.com>
Acked-by: Ian Campbell <ian.campbell@citrix.com>
Tested-by: Chao Peng <chao.p.peng@linux.intel.com>
A platform may have a GIC compatible with previous version of the
device.
This is allow to virtualize an unmodified OS on new hardware if the GIC
is compatible with older version.
When a guest is created, the vGIC will emulate same version as the
hardware. Although, the user can specify in the configuration file the
preferred version (currently only GICv2 and GICv3 are supported).
Signed-off-by: Julien Grall <julien.grall@citrix.com>
Cc: Ian Jackson <ian.jackson@eu.citrix.com>
Cc: Wei Liu <wei.liu2@citrix.com>
Acked-by: Ian Campbell <ian.campbell@citrix.com>
Usage:
hdtype=ide|ahci (default=ide)
If hdtype=ahci adds ich9 disk controller in ahci mode and uses it with
upstream qemu to emulate disks instead of ide.
It doesn't support cdroms which still using ide (cdroms will use
"-device ide-cd" as new qemu parameter)
Ahci requires new qemu parameter but for now other emulated disks cases
remains with old ones (I did it in other patch, not needed by this one)
I did it as libxl parameter disabled by default to avoid possible
problems:
- with save/restore/migration (restoring with ahci a domU that was with
ide instead)
- windows < 8 without pv drivers (a registry key change is needed for
AHCI<->IDE change FWIK to avoid possible blue screen)
- windows XP or older that many not support ahci by default.
Setting AHCI with libxl parameter and default to disabled seems the best
solution.
AHCI increase hvm domUs boot performance. On linux hvm domU I saw up to
only 20% of the previous total boot time, whereas boot time decrease a
lot on W7 domUs for most of boots I have done. Small difference in boot
time compared to ide mode on W8 and newer (probably other xen
improvements or fixes are needed not ahci related)
Signed-off-by: Fabio Fantoni <fabio.fantoni@m2r.biz>
Acked-by: Ian Campbell <ian.campbell@citrix.com>
[ ijc -- adjust name of LIBXL_HAVE #define as discussed on list,
fixup pod syntax in xl.cfg.pod.5 ]
This is the xc/xl changes to support Intel Cache Allocation
Technology(CAT).
'xl psr-hwinfo' is updated to show CAT info and two new commands
for CAT are introduced:
- xl psr-cat-cbm-set [-s socket] <domain> <cbm>
Set cache capacity bitmasks(CBM) for a domain.
- xl psr-cat-show <domain>
Show CAT domain information.
Examples:
[root@vmm-psr vmm]# xl psr-hwinfo --cat
Cache Allocation Technology (CAT):
Socket ID : 0
L3 Cache : 12288KB
Maximum COS : 15
CBM length : 12
Default CBM : 0xfff
[root@vmm-psr vmm]# xl psr-cat-cbm-set 0 0xff
[root@vmm-psr vmm]# xl psr-cat-show
Socket ID : 0
L3 Cache : 12288KB
Default CBM : 0xfff
ID NAME CBM
0 Domain-0 0xff
Signed-off-by: Chao Peng <chao.p.peng@linux.intel.com>
Reviewed-by: Dario Faggioli <dario.faggioli@citrix.com>
Acked-by: Ian Campbell <ian.campbell@citrix.com>
Add libxl_socket_bitmap_alloc() to allow allocating a socket specific
libxl_bitmap (as it is for cpu/node bitmap).
Internal function libxl__count_physical_sockets() is introduced together
to get the socket count when the size of bitmap is not specified.
Signed-off-by: Chao Peng <chao.p.peng@linux.intel.com>
Acked-by: Ian Campbell <ian.campbell@citrix.com>
This will reflect that we effectively emulate the same version as the
hardware GIC for the guest.
Signed-off-by: Julien Grall <julien.grall@citrix.com>
Acked-by: Ian Campbell <ian.campbell@citrix.com>
Various xl sub-commands take additional parameters containing = as
additional config fragments.
The handling of these config fragments has a number of bugs:
1. Use of a static 1024-byte buffer. (If truncation would occur,
with semi-trusted input, a security risk arises due to quotes
being lost.)
2. Mishandling of the return value from snprintf, so that if
truncation occurs, the to-write pointer is updated with the
wanted-to-write length, resulting in stack corruption. (This is
XSA-137.)
3. Clone-and-hack of the code for constructing the appended
config file.
These are fixed here, by introducing a new function
`string_realloc_append' and using it everywhere. The `extra_info'
buffers are replaced by pointers, which start off NULL and are
explicitly freed on all return paths.
The separate variable which will become dom_info.extra_config is
abolished (which involves moving the clearing of dom_info).
Additional bugs I observe, not fixed here:
4. The functions which now call string_realloc_append use ad-hoc
error returns, with multiple calls to `return'. This currently
necessitates multiple new calls to `free'.
5. Many of the paths in xl call exit(-rc) where rc is a libxl status
code. This is a ridiculous exit status `convention'.
6. The loops for handling extra config data are clone-and-hacks.
7. Once the extra config buffer is accumulated, it must be combined
with the appropriate main config file. The code to do this
combining is clone-and-hacked too.
Signed-off-by: Ian Jackson <Ian.Jackson@eu.citrix.com>
Tested-by: Ian Jackson <Ian.Jackson@eu.citrix.com>
Acked-by: Ian Campbell <ian,campbell@citrix.com>
On a busy host, QEMU may take more than 10s to load and start.
This is likely due to a bug in Linux where the I/O subsystem sometime
produce high latency under load and result in QEMU taking a long time to
load every single dynamic libraries.
Signed-off-by: Anthony PERARD <anthony.perard@citrix.com>
Acked-by: Ian Jackson <ian.jackson@eu.citrix.com>
Since XSA-131 qemu-xen now restricts access to PCI cfg by default. In
order to allow local configuration of the existing libxl_device_pci
"permissive" flag needs to be plumbed through via the new QMP property
added by the XSA-131 patches.
Versions of QEMU prior to XSA-131 did not support this permissive
property, so we only pass it if it is true. Older versions only
supported permissive mode.
qemu-xen-traditional already supports the permissive mode setting via
xenstore.
Signed-off-by: Ian Campbell <ian.campbell@citrix.com>
Cc: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
Cc: Anthony PERARD <anthony.perard@citrix.com>
Acked-by: George Dunlap <george.dunlap@eu.citrix.com>
Acked-by: Anthony PERARD <anthony.perard@citrix.com>
Acked-by: Wei Liu <wei.liu2@citrix.com>
They are no longer needed, having been replaced by a daemon for
driverdomains which will run scripts as necessary.
Worse yet, they seem to be broken for script-based block devices, such
as block-iscsi. This wouldn't matter so much if they were never run
by default; but if you run block-attach without having created a
domain, then the appropriate node to disable running udev scripts will
not have been written yet, and the attach will silently fail.
Rather than try to sort out that issue, just remove them entirely.
Signed-off-by: George Dunlap <george.dunlap@eu.citrix.com>
Acked-by: Wei Liu <wei.liu2@citrix.com>
There are a lot of paths through
libxl__device_disk_local_initiate_attach(), but they all really boil
down to one thing: Can we just access the file directly, or do we need
to attach it?
The requirements for direct access are fairly simple:
* Is this local (as opposed to a driver domain)?
* Is this a raw format (as opposed to cooked)?
* Does this have no scripts associated with it?
If it meets all those requirements, we can access it directly;
otherwise we need to attach it.
This fixes a bug where bootloader execution fails for disks with
hotplug scripts.
This should fix a theoretical bug when using a qdisk backend in a
driver domain. (Not tested.)
Based on a patch by Roger Pau Monne <roger.pau@citrix.com>.
Signed-off-by: George Dunlap <george.dunlap@eu.citrix.com>
Acked-by: Roger Pau Monné <roger.pau@citrix.com>
Acked-by: Ian Campbell <ian.campbell@citrix.com>
domain config output goes to
before after
xl create nowhere nowhere
xl create -d stderr stderr
xl -N create stdout stdout
xl -N create -d stderr stdout
It is not sensible that adding -d would cause different output on
stdout. And that -N would produce less debug output is hardly
surprising in general and not really a problem in this case.
Signed-off-by: Ian Jackson <Ian.Jackson@eu.citrix.com>
Acked-by: Ian Campbell <ian.campbell@citrix.com>
---
v2: New patch in this version of the mini-series.
Currently, xl -N create produces:
{
"domid": null,
"config": {
"c_info": {
"type": "pv",
[etc]
}
The domid is always NULL (as the domain has not been created at this
stage).
This is annoying if you want to take this output and use it for some
actually useful purpose like domain creation: either it needs to be
massaged, or the the consuming tool needs to be taught to look inside
the json object for the `config' element (which IMO makes no sense as
an interface).
We would like to be able to pass libxl json configs around sensibly.
In the future maybe xl will grow an option to create a domain from a
json config, and this is currently something I want to be able to have
a test tool do.
Note that this change is NOT BACKWARDS COMPATIBLE. But it would only
adversely affects anyone who uses `xl -N create' and then saves and
processes the JSON. (The output from xl list et al is not changed; it
normally needs the domid.) Such a user should probably have already
have complained about the infelicitous output. If they haven't it
would be simple enough for them to bookend the output so as to provide
compatible output.
Signed-off-by: Ian Jackson <Ian.Jackson@eu.citrix.com>
CC: Ian Campbell <ian.campbell@citrix.com>
CC: Wei Liu <wei.liu2@citrix.com>
CC: Euan Harris <euan.harris@citrix.com>
Acked-by: Ian Campbell <ian.campbell@citrix.com>
---
v2: Print json output to correct filehandle
(Using newly introduced flush_stream.)
We are going to want to reuse this. Adjust the code slightly to
detect right away call sites that pass something other than stdout or
stderr.
No resulting functional change.
Signed-off-by: Ian Jackson <Ian.Jackson@eu.citrix.com>
Acked-by: Ian Campbell <ian.campbell@citrix.com>
---
v2: New patch in this version of the mini-series
According to ARM CPUs bindings, the reg field should match the MPIDR's
affinity bits. We will use AFF0 and AFF1 when constructing the reg value
of the guest at the moment, for it is enough for the current max vcpu
number.
Signed-off-by: Chen Baozi <baozich@gmail.com>
Reviewed-by: Julien Grall <julien.grall@citrix.com>
Acked-by: Ian Campbell <ian.campbell@citrix.com>
so that, if the same config is reused later, the following
two (good) things happen:
- we do not trip over warnings because node and/or vcpu
soft affinity now exist (as a consequence of the
successful placement), but numa_placement is still
true;
- we end up always using the results of the original
execution of the placement algorithm, rather than
re-running it at each re-use of the same config,
which is what most users expects and wants.
This fixes the bug reported here:
http://lists.xenproject.org/archives/html/xen-devel/2015-06/msg04454.html
Signed-off-by: Dario Faggioli <dario.faggioli@citrix.com>
Acked-by: Ian Jackson <ian.jackson@eu.citrix.com>
instead than errors. More specifically, in libxl,
b_info->numa_autoplacement is meant as a way to
disable automatic NUMA placement, if one does not
want it to happen. It is, however, useful for
consistency checking as well, i.e., to ensure that
the user provided configuration (such as, for instance,
vcpu hard or soft affinity) and NUMA placement itself
will not clash.
However, right now, if such a clash happens we abort
domain creation and error out, which is too much! It
is, in fact, enough to infom the user/caller that NUMA
placement won't be performed, with a WARN, and that's
what this commit does.
Signed-off-by: Dario Faggioli <dario.faggioli@citrix.com>
Acked-by: Ian Jackson <ian.jackson@eu.citrix.com>
Fix example code in comment. libxl_event_check() can return
ERROR_NOT_READY; LIBXL_NOT_READY does not exist.
Signed-off-by: Euan Harris <euan.harris@citrix.com>
Acked-by: Ian Jackson <ian.jackson@eu.citrix.com>
c3c8da9 "libxl: ao: datacopier callback gets an rc" caused
libxl__domain_save_device_model() to pass its rc directly into the
callback.
However in the preexisting code, there were 3 "goto out;" paths which
left rc uninitialised. This causes a build failure with GCC 4.8's
-Wmaybe-uninitialized.
Set the rc explicitly on each goto out path.
Reported-by: Andrew Cooper <andrew.cooper3@citrix.com>
Signed-off-by: Ian Jackson <Ian.Jackson@eu.citrix.com>
Tested-by: Andrew Cooper <andrew.cooper3@citrix.com>
If we already have an rc (eg from ao abort), keep it.
Signed-off-by: Ian Jackson <Ian.Jackson@eu.citrix.com>
Acked-by: Wei Liu <wei.liu2@citrix.com>
---
v4: New patch in this version of the series.
The callbacks actually ignore this except for logging, but we should
log the correct pid.
Signed-off-by: Ian Jackson <Ian.Jackson@eu.citrix.com>
Acked-by: Wei Liu <wei.liu2@citrix.com>
---
v4: New patch in this version of the series.
Otherwise the debug log is strangely devoid of an explanation for the
spawn completing.
We decorate `what', as otherwise the logged message is rather alarming
(especially if the death is due to us sending SIGKILL, which even
happens on the success path).
Signed-off-by: Ian Jackson <Ian.Jackson@eu.citrix.com>
Acked-by: Wei Liu <wei.liu2@citrix.com>
---
v4: New patch in this version of the series.
Make it log something if the xenstore path does not exist.
Signed-off-by: Ian Jackson <Ian.Jackson@eu.citrix.com>
Acked-by: Wei Liu <wei.liu2@citrix.com>
---
v4: New patch in this version of the series.
libxl__datacopier_* can now actually generate a callback with
rc==ABORTED.
This provides abort support during some corner cases, including (at
least) copying the device model data during the end of domain save.
Signed-off-by: Ian Jackson <Ian.Jackson@eu.citrix.com>
Acked-by: Ian Campbell <ian.campbell@citrix.com>
---
v2: New in this version of the series.
libxl__datacopier_* now provides its caller's callback function with
an rc value. This relieves the caller of the need to figure out an
appropriate rc value.
Arrange that the `other internal failure' cases now get a valid
positive errno value (EIO).
In a few places, assert that errno is nonzero before passing it to our
caller.
Extend the datacopier callback API to permit the dc to signal ABORTED.
(It doesn't actually do this yet, though.)
Signed-off-by: Ian Jackson <ian.jackson@eu.citrix.com>
Acked-by: Ian Campbell <ian.campbell@citrix.com>
CC: Andrew Cooper <andrew.cooper3@citrix.com>
CC: David Vrabel <david.vrabel@citrix.com>
---
v2: New in this version of the series.
Register the the save/restore helper interface with the abort
machinery. When we are informed that save/restore should be aborted,
we make a note of the that in our rc variable, and send the helper a
SIGTERM. It will die in due course.
Signed-off-by: Ian Jackson <Ian.Jackson@eu.citrix.com>
Acked-by: Ian Campbell <ian.campbell@citrix.com>
---
v2: New in this version of the series.
During startup of the save/restore helper, set the disposition of
SIGTERM appropriately.
For restore, we can simply die immediately - there is no point trying
to do any kind of cleanup on what is now going to be a trashed domain.
For save, we want to arrange that libxc's cleanup code (eg turning off
logdirty) takes place. So our signal handler replaces the fd with one
on which writes will fail, causing libxc's own loop to fail next time
it actually tries to do a write.
Currently this has only a minor beneficial effect: we don't send the
helper a SIGTERM ourselves, and if someone else contrives to send our
helper a SIGTERM they have probably sent one to libxl too in which
case things are going to be a bit messy anyway.
But in the next patch libxl itself is going to use SIGTERM to
implement ao abort requests.
Signed-off-by: Ian Jackson <Ian.Jackson@eu.citrix.com>
Acked-by: Ian Campbell <ian.campbell@citrix.com>
---
v2: New in this version of the series.
Two unrelated non-functional changes, broken out into a pre-patch for
easier review:
Break out a function sendsig() in libxl_save_callout.c.
Move io_fd to be a global variable in libxl_save_helper.c.
Signed-off-by: Ian Jackson <Ian.Jackson@eu.citrix.com>
Acked-by: Ian Campbell <ian.campbell@citrix.com>
---
v2: New in this version of the series.
FILLZERO is a macro for memset(&foo,0,sizeof(foo)). It eliminates the
possiblity to make the error memset(&foo,0,sizeof(&foo)).
No callers yet, but document it in CODING_STYLE. (In accordance with
existing libxl policy, I haven't gone through all existing possible
call sites.)
Signed-off-by: Ian Jackson <Ian.Jackson@eu.citrix.com>
Acked-by: Ian Campbell <ian.campbell@citrix.com>
---
v2: New in this version of the series.
Make an active libxl__domaindeathcheck contain an active
libxl__ao_abortable.
Consequential changes are:
* domaindeath callbacks now take an rc value.
* libxl__domaindeathcheck_start takes an ao, not a gc.
* bootloader_domaindeath plumbs the rc through to its caller.
* libxl__domaindeathcheck_init and _stop are not quite trivial any
more so are moved from (inline functions) in libxl_internal.h, to
ordinary functions defined in libxl_event.c.
* libxl__domaindeathcheck_start is not trivial any more, and now has
the standard error-handling pattern.
The only current user of libxl__domaindeathcheck is the bootloader.
So the result is that now it is possible to effectively abort domain
creation while the bootloader is running.
Signed-off-by: Ian Jackson <Ian.Jackson@eu.citrix.com>
Acked-by: Ian Campbell <ian.campbell@citrix.com>
---
v2: New in this version of the series.
This is currently reported only by the bootloader code, if the domain
is destroyed while the bootloader is running.
In the future it would be nice to return it for other circumstances
where the domain existed when the operation started but subsequently
vanished.
Signed-off-by: Ian Jackson <Ian.Jackson@eu.citrix.com>
Acked-by: Ian Campbell <ian.campbell@citrix.com>
---
v4: Add a comment about the new error code's semantics
v2: New in this version of the series.
In practice, aborting this task will cause all subsequent actual
backend operations to fail, but will not actually cause the
libxl_device_events_handler operation to complete.
Signed-off-by: Ian Jackson <Ian.Jackson@eu.citrix.com>
CC: Roger Pau Monné <roger.pau@citrix.com>
Acked-by: Roger Pau Monné <roger.pau@citrix.com>
Acked-by: Ian Campbell <ian.campbell@citrix.com>
---
v2: New in this version of the series.
Make libxl__ev_time* register with the abort machinery, so that
libxl_ao_abort can stop any operation which has a timeout.
Signed-off-by: Ian Jackson <Ian.Jackson@eu.citrix.com>
Acked-by: Wei Liu <wei.liu2@citrix.com>
---
v4: Do not immediately deregister the abortable (!)
(v3 was Acked-by: Ian Campbell <ian.campbell@citrix.com>)
Some places in libxl which can't handle abort via a
libxl__ao_abortable callback might nevertheless benefit from being
able to explicitly check whether abort has been requested.
Provide the (fairly trivial) internal API function to do this.
Signed-off-by: Ian Jackson <Ian.Jackson@eu.citrix.com>
Acked-by: Ian Campbell <ian.campbell@citrix.com>
---
v2: New in this version of the series.
Provide libxl_ao_abort.
There is machinery to allow an ao to register an interest in abort
requests, using a libxl__ao_abortable.
This API is not currently very functional: requesting abort will
never have any effect.
Signed-off-by: Ian Jackson <Ian.Jackson@eu.citrix.com>
Acked-by: Wei Liu <wei.liu2@citrix.com>
---
v5: Clarify API doc comment re aborting synchronous operations.
v4: Rename from cancel to abort.
Actually record aos on aos_inprogress.
(Report from Koushik Chakravarty at Citrix.)
Do not mark libxl_ao_cancel hidden (!)
Abolish ERROR_NOTIMPLEMENTED from libxl_ao_cancel.
All operations are supposed to support cancellation.
v2: Minor comment improvements
Previously we used in_initiator to stop the ao being freed while we
were still in the initiator function (which would result in the
initiator's call to libxl__ao_inprogress accessing the ao after it had
been freed).
We are going to introduce a new libxl entrypoint which finds, and
operates on, ongoing aos. This function needs the same protection,
and might even end up running on the same ao multiple times
concurrently.
So do this with reference counting instead, with a new variable
ao->manip_refcnt.
We keep ao->in_initiator because that allows us to keep some useful
asserts about the sequencing of libxl__ao_inprogress, etc.
Signed-off-by: Ian Jackson <ian.jackson@eu.citrix.com>
Acked-by: Ian Campbell <ian.campbell@citrix.com>
---
v5: Fix typo in commit message.
v3: Add a missing space.
Mention locking in the comment.
If we aborted the domain creation, do not try to tear it down again
Document this.
This is a backwards-compatible API change since old libxl users will
never abort any operations.
In the current code, there is no functional change, because
ERROR_ABORTED is never generated anywhere yet.
Signed-off-by: Ian Jackson <Ian.Jackson@eu.citrix.com>
Acked-by: Ian Campbell <ian.campbell@citrix.com>
---
v4: ABORTED not CANCELLED.
Always write out guest domid on completion.
Do not trash rc with libxl__set_domain_configuration on preserve path.
Make spawn provide an rc to its caller, and either pass it through
from the timeout callback, or invent ERROR_FAIL, as applicable.
Signed-off-by: Ian Jackson <Ian.Jackson@eu.citrix.com>
Acked-by: Wei Liu <wei.liu2@citrix.com>
---
v4: New patch in this version of the series.
Andrew Cooper
Julien Grall
Fabio Fantoni
Chao Peng
Dario Faggioli
Ian Campbell
Ian Jackson
Anthony PERARD
George Dunlap
Chen Baozi
Euan Harris
Wen Congyang