Commit Graph
51 Commits
Author SHA1 Message Date
Ian Jackson 8fc051a10f libxl: move a lot more includes into libxl_internal.h
Move a lot of
  #include <stdfoo.h>
from individual files into libxl_internal.h.  This helps avoid
portability mistakes where necessary system headers are omitted from
individual files, and is also of course a convenience when developing.

Also add
  #include "libxl_osdeps.h" /* must come before any other headers */
to the top of most libxl*.c files, so that anyone who adds any headers
before libxl_internal.h will put the in the right place.

Signed-off-by: Ian Jackson <ian.jackson@eu.citrix.com>
Acked-by: Ian Campbell <ian.campbell@citrix.com>
Committed-by: Ian Jackson <Ian.Jackson@eu.citrix.com>
2012-01-13 16:54:19 +00:00
Olaf Hering 17c9cd6d20 libxl: add feature flag to xenstore for XS_RESET_WATCHES
Tell guest about availibilty of xenstoreds XS_RESET_WATCHES function.
Guests can not issue this command unconditionally because some buggy
toolstacks (such as EC2) do not ignore unknown commands properly.

Signed-off-by: Olaf Hering <olaf@aepfle.de>
Committed-by: Ian Jackson <ian.jackson.citrix.com>
Acked-by: Ian Jackson <ian.jackson@eu.citrix.com>
2012-01-05 19:40:40 +01:00
Paul Durrant 8f76fc6c98 tools: VM generation ID save/restore and migrate.
Add code to track the address of the VM generation ID buffer across a
save/restore or migrate, and increment it as necessary.
The address of the buffer is written into xenstore by hvmloader at
boot time. It must be read from xenstore by the caller of
xc_domain_save() and then written back again by the caller of
xc_domain_restore().

Note that the changes to xc_save.c and xc_restore.c are merely
sufficient for them to build.

Signed-off-by: Paul Durrant <paul.durrant@citrix.com>
Committed-by: Ian Jackson <ian.jackson.citrix.com>
2011-12-16 14:54:14 +00:00
Paul Durrant be9b274df1 libxl: Add hvm specific ro and rw nodes.
The hvmloader node was created by libxl__create_device_model() but it
needs to be moved earlier so that it can parent the new rw
generation-id-address node.

Signed-off-by: Paul Durrant <paul.durrant@citrix.com>
Signed-off-by: Ian Jackson <ian.jackson@eu.citrix.com>
Committed-by: Ian Jackson <ian.jackson.citrix.com>
Acked-by: Ian Jackson <ian.jackson@eu.citrix.com>
2011-12-16 14:54:13 +00:00
Paul Durrant e77389f816 libxl: Open code rw and ro node creation.
Use a new libxl__xs_mkdir() to do this and also clean up extraneous
node creation while in the neighbourhood. Checking 'xenstore-ls -fp'
output before and after shows that, as well as the disappearance of
error, drivers, messages and domid, the following perms change is also
present:

-device/suspend = ""   (ndomU)
+device/suspend = ""   (n0,rdomU)

I believe the new perms are more desirable than the old ones.

Signed-off-by: Paul Durrant <paul.durrant@citrix.com>
Committed-by: Ian Jackson <ian.jackson.citrix.com>
Acked-by: Ian Jackson <ian.jackson@eu.citrix.com>
2011-12-16 14:54:13 +00:00
Roger Pau Monne 0b5c5ae1bd libxl: remove force parameter from libxl_domain_destroy
Since a destroy is considered a forced shutdown, there's no point in
passing a force parameter. All the occurences of this function have
been replaced with the proper syntax.

Signed-off-by: Roger Pau Monne <roger.pau@entel.upc.edu>
Acked-by: Ian Jackson <ian.jackson.citrix.com>
Committed-by: Ian Jackson <ian.jackson.citrix.com>
Acked-by: Ian Jackson <ian.jackson@eu.citrix.com>
2011-12-15 18:55:46 +01:00
Ian Campbell e53a33568d libxl: do not leak qemu saved state on restore
In particular do not leak /var/lib/xen/qemu-resume.<domid>.

Signed-off-by: Ian Campbell <ian.campbell@citrix.com>
Acked-by: Ian Jackson <ian.jackson@eu.citrix.com>
Committed-by: Ian Jackson <ian.jackson@eu.citrix.com>
2011-12-13 15:42:18 +00:00
Ian Campbell c3bf513810 libxl: Compile with -Wformat-nonliteral.
At least one compiler (some Ubuntu version) uses this by default and it seems
like a good idea anyway and the fixup required is trivial.

One hunk is from a patch by Ian Jackson.

Signed-off-by: Ian Jackson <ian.jackson@eu.citrix.com>
Signed-off-by: Ian Campbell <ian.campbell@citrix.com>
Reported-by: Adda Rathbone <addarathbone@googlemail.com>
Tested-by: Adda Rathbone <addarathbone@googlemail.com>
Tested-by: Andrew Pounce <andrew.pounce@citrix.com>
Committed-by: Ian Jackson <ian.jackson@eu.citrix.com>
2011-12-13 15:31:12 +00:00
Ian Jackson bdf07e8ed2 libxl: Use GC_INIT and GC_FREE everywhere
Replace
    libxl__gc gc = LIBXL_INIT_GC(ctx);
    ...
    libxl__free_all(&gc);
with
    GC_INIT(ctx);
    ...
    GC_FREE;
throughout with a couple of perl runes.

We must then adjust uses of the resulting gc for pointerness, which is
mostly just replacing all occurrences of "&gc" with "gc".  Also a
couple of unusual uses of LIBXL_INIT_GC needed to be fixed up by hand.

Here are those runes:
 perl -i -pe 's/\Q    libxl__gc gc = LIBXL_INIT_GC(ctx);/    GC_INIT(ctx);/' tools/libxl/*.c
 perl -i -pe 's/\Q    libxl__free_all(&gc);/    GC_FREE;/' tools/libxl/*.c

Signed-off-by: Ian Jackson <ian.jackson@eu.citrix.com>
Acked-by: Ian Campbell <ian.campbell@citrix.com>
Committed-by: Ian Jackson <Ian.Jackson@eu.citrix.com>
2011-12-12 17:48:42 +00:00
Ian Jackson 8618d4e458 libxl: Rationalise #includes
libxl_internal.h now #includes libxl.h and various system headers.

This
 1. makes the order of header inclusion more predictable
 2. explicitly allows libxl_internal.h to use objects defined in libxl.h
 3. removes the need for individual files to include these headers

Also
 - remove some unnecessary #includes of libxl_utils.h,
   flexarray.h, etc. in some libxl*.c files,
 - include libxl_osdeps.h at the top of libxl_internal.h
 - add missing includes of libxl_osdeps.h to a couple of files
 - change libxl.h to libxl_internal.h in a couple of files

Signed-off-by: Ian Jackson <ian.jackson@eu.citrix.com>
Acked-by: Ian Campbell <ian.campbell@citrix.com>
Committed-by: Ian Jackson <Ian.Jackson@eu.citrix.com>
2011-12-12 17:48:40 +00:00
Andre Przywara 0eefd10912 xl: fix compiler warnings
either GCC 4.6.1 or Ubuntu add -Werror=format-security to the -Wall set,
so libxl compilation breaks:
   libxl_create.c: In function 'store_libxl_entry':
   libxl_create.c:454:9: error: format not a string literal and no
format arguments [-Werror=format-security]
   cc1: all warnings being treated as errors

Attached patch fixes this and another occurrence.

Patch from: Uwe Dannowski

Signed-off-by: Andre Przywara <andre.przywara@amd.com>
Acked-by: Ian Jackson <ian.jackson@eu.citrix.com>
Committed-by: Ian Jackson <ian.jackson@eu.citrix.com>
2011-12-12 17:43:15 +00:00
Stefano Stabellini ebbd2561b4 libxl: Add a vkbd frontend/backend pair for HVM guests
Linux PV on HVM guests can use vkbd, so add a vkbd frontend/backend
pair for HVM guests by default.  It is useful because it doesn't
require frequent qemu wakeups as the usb keyboard/mouse does.

Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
Committed-by: Ian Jackson <ian.jackson@eu.citrix.com>
2011-11-22 16:19:48 +00:00
Paul Durrant 95ad9f65c9 hvmloader: Add configuration options to selectively disable S3 and S4 ACPI power states.
Introduce acpi_s3 and acpi_s4 configuration options (default=1). The
S3 and S4 packages are moved into separate SSDTs and their inclusion
is controlled by the new configuration options.

Signed-off-by: Paul Durrant <paul.durrant@citrix.com>
Committed-by: Keir Fraser <keir@xen.org>
2011-11-18 13:32:50 +00:00
Paul Durrant 9307335747 hvmloader: Move acpi_enabled out of hvm_info_table into xenstore
Since hvmloader has a xentore client, use a platform key in xenstore
to indicate whether ACPI is enabled or not rather than the shared
hvm_info_table structure.

Signed-off-by: Paul Durrant <paul.durrant@citrix.com>
Committed-by: Keir Fraser <keir@xen.org>
2011-11-18 13:31:43 +00:00
Anthony PERARD 6291ab8bf8 libxl: libxl: Introduce dm-version xenstore key.
The all key is /libxl/$domid/dm-version.

The /libxl/$domid dir is created with the domain and should be only accessible
by the toolstack domain. The function libxl__xs_libxl_path() give this path.

This come with libxl__device_model_version_running() helper function.

Signed-off-by: Anthony PERARD <anthony.perard@citrix.com>
Committed-by: Ian Jackson <ian.jackson.citrix.com>
2011-11-04 12:38:23 +00:00
Olaf Hering 0790b64cc8 libxl: rename libxl__device_model_starting
Signed-off-by: Olaf Hering <olaf@aepfle.de>
Acked-by: Ian Jackson <ian.jackson.citrix.com>
Committed-by: Ian Jackson <ian.jackson.citrix.com>
2011-10-27 11:19:16 +02:00
Ian Campbell 9dcc52ddb6 libxl: idl: use "dispose" rather than "destroy" for function to free IDL types
Destroy is an overloaded term which would commonly like to be used for actual
destructive operations, such as destroying a domain etc.

Dispose isn't a great term but it does the job.

Signed-off-by: Ian Campbell <ian.campbell@citrix.com>
Acked-by: Ian Jackson <ian.jackson.citrix.com>
Committed-by: Ian Jackson <ian.jackson.citrix.com>
2011-10-18 10:35:55 +01:00
Ian Campbell 10befefe28 libxl: libxl__e820_alloc must take a libxl__gc.
Signed-off-by: Ian Campbell <ian.campbell@citrix.com>
Acked-by: Ian Jackson <ian.jackson.citrix.com>
Committed-by: Ian Jackson <ian.jackson.citrix.com>
2011-10-13 10:32:09 +01:00
Ian Campbell c18ad21eac libxl: fixup incorrect indentation
Several places which were previsously indented using hard tabs are now
incorrectly indented. Fix them up.

Signed-off-by: Ian Campbell <ian.campbell@citrix.com>
Acked-by: Ian Jackson <ian.jackson@eu.citrix.com>
Committed-by: Ian Jackson <ian.jackson@eu.citrix.com>
2011-10-12 16:21:32 +01:00
Roger Pau Monne 8d7a87b20e libxl: create pci backend only when there are pci devices.
Creating empty pci entries made Linux DomUs under NetBSD Dom0 wait a very long time for devices to initialize during kernel boot.

Signed-off-by: Roger Pau Monne <roger.pau@entel.upc.edu>
Acked-by: Ian Jackson <ian.jackson@eu.citrix.com>
Committed-by: Ian Jackson <ian.jackson@eu.citrix.com>
2011-10-06 17:26:18 +01:00
Anthony PERARD afa6bb987b libxl: Introduce a QMP client
QMP stands for QEMU Monitor Protocol and it is used to query information
from QEMU or to control QEMU.

This implementation will ask QEMU the list of chardevice and store the
path to serial ports in xenstored. So we will be able to use xl console
with QEMU upstream.

In order to connect to the QMP server, a socket file is created in
/var/run/xen/qmp-libxl-$(domid).

Signed-off-by: Anthony PERARD <anthony.perard@citrix.com>
Committed-by: Ian Jackson <ian.jackson@eu.citrix.com>
2011-09-29 16:30:54 +01:00
Wei Liu b2c448b55c libxl: enabling upstream qemu as pure pv backend.
This patch makes device_model_{version,override} work for pure pv
guest, so that users can specify upstream qemu as pure pv backend
other than traditional qemu-xen.

This patch also adds device_model_args_{pv,hvm} options for pv and
hvm guest respectively.

Internally, original libxl__create_xenpv_qemu allocates a new empty
dm_info (struct libxl_device_model_info) for every xenpv qemu created.
Now the caller of libxl__create_xenpv_qemu is responsible for
allocating this dm_info.

Signed-off-by: Wei Liu <liuw@liuw.name>
Acked-by: Ian Jackson <ian.jackson@eu.citrix.com>
Committed-by: Ian Jackson <ian.jackson@eu.citrix.com>
2011-07-19 15:47:14 +01:00
Ian Campbell c9a87ccb1f libxl: specify HVM vs PV in create_info using libxl_domain_type enum
Since libxl_init_build_info now needs an error return and a ctx (to
log to) switch all libxl_init_*_info to have an int return and a ctx.

Signed-off-by: Ian Campbell <ian.campbell@citrix.com>
Acked-by: Ian Jackson <ian.jackson.citrix.com>
Committed-by: Ian Jackson <ian.jackson.citrix.com>
2011-07-18 14:52:30 +01:00
Ian Campbell bd3454b651 libxl: specify HVM vs PV in build_info using libxl_domain_type enum
Also caught one place (in libxl__domain_restore_common) which used
info->u.hvm.pae even if !hvm. (fortunately the value was unused in
xc_domain_restore).

Signed-off-by: Ian Campbell <ian.campbell@citrix.com>
Acked-by: Ian Jackson <ian.jackson.citrix.com>
Committed-by: Ian Jackson <ian.jackson.citrix.com>
2011-07-18 14:52:30 +01:00
Ian Jackson bab1f0a2b0 libxl: sane disk backend selection and validation
Introduce a new function libxl__device_disk_set_backend which
does some sanity checks and determines which backend ought to be used.

If the caller specifies LIBXL_DISK_BACKEND_UNKNOWN (which has the
value 0), it tries PHY, TAP and QDISK in that order.  Otherwise it
tries only the specified value.

libxl__device_disk_set_backend (and its helper function
disk_try_backend) inherit the role (and small amounts of the code)
from validate_virtual_disk.  This is called during do_domain_create
and also from libxl_disk_device_add (for the benefit of hotplug
devices).

It also now takes over the role of the scattered fragments of backend
selection found in libxl_device_disk_add,
libxl_device_disk_local_attach and libxl__need_xenpv_qemu.  These
latter functions now simply do the job for the backend they find has
already been specified and checked.

The restrictions on the capabilities of each backend, as expressed in
disk_try_backend (and to an extent in libxl_device_disk_local_attach)
are intended to be identical to the previous arrangements.

In 23618:3173b68c8a94 combined with 23622:160f7f39841b,
23623:c7180c353eb2, "xl" effectively became much more likely to select
TAP as the backend.  With this change to libxl the default backend
selected by the libxl__device_disk_set_backend is intended to once
again to be PHY where possible.

Signed-off-by: Ian Jackson <ian.jackson@eu.citrix.com>
Cc: Ian Campbell <Ian.Campbell@citrix.com>
2011-07-06 18:26:49 +01:00
Marek Marczykowski b6c23c86fe libxl: add all pci devices to xenstore at once (during VM create)
When adding pci devices one by one, pciback notice only the first one. For
every next, "state" is left as is (usualy "4" in that time), so backend will
not rescan xenstore. So when VM is starting all devices should be added at once
and then backend can initialize it.

This applies only to pci, because only pci backend have one xenstore dir for
multiple devices.

Signed-off-by: Marek Marczykowski <marmarek@mimuw.edu.pl>
Signed-off-by: Ian Jackson <ian.jackson@eu.citrix.com>
Committed-by: Ian Jackson <ian.jackson@eu.citrix.com>
2011-06-21 17:50:47 +01:00
Konrad Rzeszutek Wilk 414979ba85 libxl: Add support for passing in the host's E820 for PCI passthrough
The code that populates E820 is unconditionally triggered by the guest
configuration having "pci=['<BDF>,..']", being a PV guest, and if
b_info->u.pv.e820_host is set.

The code do_domain_create calls the libxl__e820_alloc when
it notices that the guest is PV, has at least one PCI devices, and has
the e820_host flag set.

libxl__e820_alloc calls the xc_get_machine_memory_map to retrieve the systems
E820. Then the E820 is sanitized to weed out E820 entries below 16MB, and as
well remove any E820_RAM or E820_UNUSED regions as the guest does not need to
know about them. The guest only needs the E820_ACPI, E820_NVS, E820_RESERVED to
get an idea of where the PCI I/O space is. Mostly.. The Linux kernel assumes that any
gap in the E820 is considered PCI I/O space which means that if we pass
in the guest 2GB, and the E820_ACPI, and its friend start at 3GB, the
gap between 2GB and 3GB will be considered as PCI I/O space. To guard against
that we also create an E820_UNUSABLE between the region of 'target_kb'
(called ram_end in the code) up to the first E820_[ACPI,NVS,RESERVED] region.
Lastly, the xc_domain_set_memory_map is called to install the new E820.

When tested with another PV guest (NetBSD 5.1) the modified E820 gave
it no trouble. The code has also been tested with older "classic" Xen Linux
and with the newer "pvops" with success (SLES11, RHEL5, Ubuntu Lucid,
Debian Squeeze, 2.6.37, 2.6.38, 2.6.39).

Memory that is slack or for balloon (so 'maxmem' in guest configuration)
is put behind the machine E820. Which in most cases is after the 4GB.

The reason for doing the fetching of the E820 using the hypercall in
the toolstack (instead of the guest doing it) is that when a guest
would do a hypercall to 'XENMEM_machine_memory_map' it would
retrieve an E820 with I/O range caps added in. Meaning that the
region after 4GB up to end of possible memory would be marked as unusable
and the kernel would not have any space to allocate a balloon
region.

Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Committed-by: Ian Jackson <ian.jackson.citrix.com>
2011-05-26 09:56:26 -04:00
Ian Campbell 1d70c3df6a libxl: pass device model info down into HVM domain build functions.
The builder will soon need to know the device model version in order to select
the correct firmware.

Signed-off-by: Ian Campbell <ian.campbell@citrix.com>
Acked-by: Ian Jackson <ian.jackson@eu.citrix.com>
Committed-by: Ian Jackson <ian.jackson@eu.citrix.com>
2011-05-24 18:25:56 +01:00
Ian Campbell 160b1835d2 libxl/xl: Use "firmware" rather than "hvmloader" in API.
23251:0710f53cef4a turned build_info.kernel into
build_info.hvm.hvmloader however this is a rather specific name for a
field which may be used to load things which aren't hvmloader in the
future. Switch to calling the field and associated configuration itmes
"firmware" instead.

Signed-off-by: Ian Campbell <ian.campbell@citrix.com>
Acked-by: Ian Jackson <ian.jackson@eu.citrix.com>
Committed-by: Ian Jackson <ian.jackson@eu.citrix.com>
2011-05-24 18:24:58 +01:00
Ian Campbell e1bcb38aa2 libxl: turn some stray printf's in libxl into LIBXL__LOG.
Appear to have been leftover from when the domain create stuff was
pushed down from xl into the library.

Signed-off-by: Ian Campbell <ian.campbell@citrix.com>
Acked-by: Ian Jackson <ian.jackson@eu.citrix.com>
Committed-by: Ian Jackson <ian.jackson@eu.citrix.com>
2011-05-20 18:12:41 +01:00
Ian Jackson 142cbfcc6d libxl: Fix apic/acpi confusion
"apic" was written a couple of times where "acpi" was meant.

Signed-off-by: Zhou Peng <zhoupeng@nfs.iscas.ac.cn>
Signed-off-by: Ian Jackson <ian.jackson@eu.citrix.com>
Acked-by: Ian Campbell <Ian.Campbell@eu.citrix.com>
Acked-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
Committed-by: Ian Jackson <ian.jackson@eu.citrix.com>
2011-05-17 17:28:12 +01:00
Ian Campbell 59f8f46a49 tools: libxl: remove libxl_domain_build_state from the IDL
This datastructure is internal to the library.

Remove the reference from libxl_device_console. This could never have
been used from outside libxl and is only used internally to add the
primary PV console to a guest. Make an internal variant of
libxl_device_console_add which takes the build state as a parameter
instead.

Signed-off-by: Ian Campbell <ian.campbell@citrix.com>
Acked-by: Ian Jackson <ian.jackson.citrix.com>
Committed-by: Ian Jackson <ian.jackson.citrix.com>
2011-04-20 17:13:07 +01:00
Ian Campbell 2da839263c tools: libxl: namespace enum values within their type.
In other words the values for an enum type libxl_foo always take the
form LIBXL_FOO_VALUE.

Signed-off-by: Ian Campbell <ian.campbell@citrix.com>
Acked-by: Ian Jackson <ian.jackson.citrix.com>
Committed-by: Ian Jackson <ian.jackson.citrix.com>
2011-04-20 17:13:07 +01:00
Ian Campbell f0adb65d3a tools: libxl: hide selection of device-model by default.
This should never have been exposed to users as something they are
required to think about, unless they want to.

At the libxl API level:
      * Add libxl_device_model_info.device_model_version allowing the
        user to say which qemu version (e.g. old qemu-xen or qemu
        upstream) they want for a domain.
      * Add libxl_device_model_info.device_model_stubdomain allowing
        the user to select stub or non-stub device model
      * Default both the device_model field to NULL and DTRT when
        building a domain with that value in those fields, but still
        allow libxl users to specify something explicit if they want.
      * Note that libxl_device_model_info.device_model, if specified,
        must now be a complete path.

At the xl level:
      * Support a new "device_model_version" option which sets the new
        libxl_device_model_info.device_model_version field. This
        option is mandatory if device_model_override is used.
      * Support a new "device_model_stubdomain_override" option which
        allows the user to request stubdomain if desired.
      * WARN if an HVM guest cfg uses the "device_model" config
        option, and direct users to the "device_model_override" option
        if they really do not want the default. If the "device_model"
        directive contains "stubdom-db" then direct users to the
        "device_model_stubdomain_override" directive.

The default qemu remains the existing qemu-xen based qemu-dm and
stubdomain defaults to off. I chose the name "qemu-xen traditional" to
refer to the existing Xen fork of qemu and simply "qemu-xen" to refer to
the new device model based on qemu upstream.

I suspect that the vast majority of users only have these config
options because they've copied them from somewhere and they normally
have no interest in which device model is used. Renaming the fields
and warning when they are used makes these decisions internal. This
will allow us to make decisions at a platform level regarding the
preferred hvmloader, device model, stub domain etc without requiring
everyone to change their configuration files.

Adding a device model version to the API is intended to make it easy
for users to select what they need without having to know about the
paths to specific binaries etc. Most importantly it gets rid of the
parsing of the output of qemu -h...

It's not clear where upstream qemu will eventually be installed, I
went with /usr/bin/qemu for now.

Signed-off-by: Ian Campbell <ian.campbell@citrix.com>
Acked-by: Ian Jackson <ian.jackson.citrix.com>
Committed-by: Ian Jackson <ian.jackson.citrix.com>
2011-04-20 17:13:00 +01:00
Ian Campbell 0cb2a57421 tools: libxl: hide selection of hvmloader by default.
This should never have been exposed to users as something they are
required to think about, unless they want to.

At the libxl API level:
      * Move libxl_domain_build_info.kernel into the PV side of the
        tagged union (using this field to specify both PV kernel and
        hvmloader is confusing)
      * Add hvmloader (a string) to the HVM side of the tagged union.
        This defaults to NULL and libxl will DTRT with that default
        but still allow libxl users to specify something explicit if
        they want.

At the xl level:
      * WARN if an HVM guest cfg uses the "kernel" config option, and
        direct users to the "hvmloader_override" option if they really
        do not want the default hvmloader.

Signed-off-by: Ian Campbell <ian.campbell@citrix.com>
Acked-by: Ian Jackson <ian.jackson.citrix.com>
Committed-by: Ian Jackson <ian.jackson.citrix.com>
2011-04-19 09:16:24 +01:00
Ian Campbell d658d039cd libxl: drop domid field from libxl_device_*
All functions which add a device to a domain already take a domid
argument and the callers typically write the same value to the
structure right before making the call.

Functions which delete a device typically do not but adding this field
makes the interface more consistent anyway and all callers have the
domid to hand.

All functions which return a libxl device structure are given a domid
as a paramter and the caller therefore already knows which domain it
is dealing with.

Signed-off-by: Ian Campbell <ian.campbell@citrix.com>
Acked-by: Ian Jackson <ian.jackson@eu.citrix.com>
Committed-by: Ian Jackson <ian.jackson@eu.citrix.com>
2011-04-08 16:36:20 +01:00
Ian Campbell bc57ea8ce5 libxl/xl: drop support for netchannel2
netchannel2 was never widely deployed and no supported kernel includes
either the front- or back-ends. The last known kernel with this
support was the xen.git 2.6.31 branch which has been unsupported for
ages.

xl will warn the user if it spots a "vif2" configration item but
otherwise support is completely removed.

Work is ongoing to add the interesting features of netchannel2 as
protocol extensions to netchannel1.

Signed-off-by: Ian Campbell <ian.campbell@citrix.com>
Acked-by: Ian Jackson <ian.jackson@eu.citrix.com>
Committed-by: Ian Jackson <ian.jackson@eu.citrix.com>
2011-04-08 16:21:12 +01:00
cegger 567ab9ef56 tools: Add nestedhvm guest config option
Signed-off-by: Christoph Egger <Christoph.Egger@amd.com>
Acked-by: Eddie Dong <eddie.dong@intel.com>
Acked-by: Tim Deegan <Tim.Deegan@citrix.com>
Committed-by: Tim Deegan <Tim.Deegan@citrix.com>
2011-02-28 12:21:38 +01:00
Ian Campbell 026bb0b5c0 libxl: remove XS transaction from public API.
All external users pass 0 anyway so make the version of
libxl_domain_rename which takes a transaction internal and provide an
external facing function which does not expose a transaction.

Signed-off-by: Ian Campbell <ian.campbell@citrix.com>
Acked-by: Ian Jackson <ian.jackson@eu.citrix.com>
Committed-by: Ian Jackson <ian.jackson@eu.citrix.com>
2011-03-23 15:55:13 +00:00
Ian Campbell eca0cebba1 libxl: Make all hidden/static functions take a gc not a ctx
Also ensure that static and hidden functions use the libxl__ prefix
not just libxl_ (in the case of static functions only when they use a
libxl prefix to start with).

This follows the policy described in libxl.h "libxl memory
management".

Based on a manual audit of:
grep ^static tools/libxl/libxl*.[ch]| grep libxl_ctx
grep libxl__ tools/libxl/*.h| grep libxl_ctx

Signed-off-by: Ian Campbell <ian.campbell@citrix.com>
Committed-by: Ian Jackson <ian.jackson@eu.citrix.com>
2011-03-15 18:20:46 +00:00
Ian Jackson 70628d024d libxl: Multi-device passthrough coldplug: do not wait for unstarted guest
When doing a PCI passthrough, the code checks to see whether there is
an existing backend directory in xenstore with a nonzero "num_devs".
If there isn't, it creates the backend directory with just the
required device.

If there is, it would assume that it was doing hotplug.  If doing
hotplug, it needs to set the "state" node in xenstore to "7"
(reconfiguring) and thus avoid racing with the backend needs to wait
for the backend to be "4" (connected).

However during guest creation, the presence of "num_devs" doesn't
necessarily mean hotplug.  If we are still creating the initial
xenstore setup (ie, adding devices as a subroutine of domain
creation), we can just write the new devices to xenstore.  So do that.

This involves adding a new parameter "starting", indicating that we
are still in domain creation, to libxl_device_pci_add_xenstore (a
misnamed internal function) and its callers.  Its callers include
libxl_device_pci_add which we therefore split into an internal version
with the new parameter, and an external version used only for hotplug
by libxl-using applications.

Signed-off-by: Ian Jackson <Ian.Jackson@eu.citrix.com>
Acked-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
Acked-by: Ian Campbell <ian.campbell@citrix.com>
Committed-by: Ian Jackson <ian.jackson@eu.citrix.com>
2011-02-25 17:15:20 +00:00
Ian Campbell 9d60f0d3de 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
to allow the guest to write to the node.

Currently libxl is quite relaxed about this protocol and doesn't
reeally seem to mind that the guest is unable to write the node to
perform the acknowledgement. However in a followup patch libxl needs
to be able to detect that a guest has acknowledged a suspend request.

A side effect of this change is that an empty "control/shutdown" node
is created upon domain creation instead of only being created when a
shutdown/reboot/suspend is requested. This should not (and does not
in my tests) have any negative impact on the guest.

Signed-off-by: Ian Campbell <ian.campbell@citrix.com>
Committed-by: Ian Jackson <ian.jackson@eu.citrix.com>
2011-02-11 17:56:24 +00:00
Stefano Stabellini 33c82cfa48 libxl: do not call libxl__file_reference_unmap twice
Fix double free due to libxl__file_reference_unmap(&info->kernel) called
multiple times: first at the end of libxl__domain_build and then in
libxl_domain_build_info_destroy.

Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
Acked-by: Ian Jackson <ian.jackson@eu.citrix.com>
Committed-by: Ian Jackson <ian.jackson@eu.citrix.com>
2011-02-11 17:53:08 +00:00
Stefano Stabellini ec5fb67597 libxl: fix console autoconnect with pygrub, by invoking xenconsole twice
When using pygrub we have to connect to the console twice: once at the
beginning to connect to pygrub and a second time after creating the pv
console to connect to the guest's console.

Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
Acked-by: Ian Jackson <ian.jackson@eu.citrix.com>
Committed-by: Ian Jackson <ian.jackson@eu.citrix.com>
2011-02-04 18:29:55 +00:00
Ian Jackson 36ac3bcd56 libxl: prevent creation of domains with duplicate names
libxl_domain_rename is where domain names are assigned.  Therefore
this is where we check that no two domains have the same name.  As a
special exception, domains whose names are "" are not considered to
clash.

We also take special care not to mind if we try to rename a domain to
the name it already has.

Signed-off-by: Ian Jackson <Ian.Jackson@eu.citrix.com>
Acked-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
Committed-by: Ian Jackson <ian.jackson@eu.citrix.com>
2011-01-28 18:39:09 +00:00
Ian Jackson eeec7ca8f4 libxl, xl: fixes to domain creation cleanup logic (domid values)
libxl__domain_make makes some assumptions about the way its caller
treats its uint32_t *domid parameter: specifically, if it fails it may
have partially created the domain and it does not every destroy it.
But it does not initialise it.  Document this assumption in a comment,
and assert on entry that domid not a guest domain id, to ensure that
the caller has properly initialised it.

Introduce a function libxl_domid_valid_guest to help with this.

This is not intended to produce any practical functional change in
current code.

Secondly, libxl_create_stubdom calls libxl__domain_make and has no
code to tear down the domain again on error.  This is complicated to
fix (since it may even be possible for the the domain to be left in a
state where it's not possible to tell that it was going to be a
stubdom for some other domain).  So for now simply leave a fixme
comment.

Finally, in 22739:d839631b6048 we introduced "-1" as a sentinel "no
such domain" value for domid.  However, domid is a uint32 so testing
it with "if (domid > 0)" as we do in 22740:ce208811f540 is wrong
because it always triggers.  Instead use libxl_domid_valid_guest.
This fix means that that if "xl create" fails, it will not try to
destroy the domain "-1".  Previously you'd see this message:
  libxl: error: libxl.c:697:libxl_domain_destroy non-existant domain -1
whose "-1" many readers may have thought was an error code, but which
is actually supposedly a domain id.

Signed-off-by: Ian Jackson <Ian.Jackson@eu.citrix.com>
Acked-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
Committed-by: Ian Jackson <ian.jackson@eu.citrix.com>
2011-01-28 18:36:54 +00:00
Ian Jackson 1057300109 libxl: fix error handling (xenstore transaction leak) in libxl__domain_make
libxl__domain_make could under some circumstances leak the xenstore
transaction (stored in the variable t).  Also, failures to commit the
xenstore transaction for reasons other than EAGAIN would be ignored (!)

Fix this as follows:

  * Initialise t to 0 (not a valid transaction id), and when the
    transaction is successfully committed or rolled back, reset it.

  * Change all the instances of:       libxl__free_all(&gc); return error;
    to instead do:                     rc=error;  goto out;

  * Use the out stanza for exiting, setting rc=0 on success first.

  * Explicitly abort the transaction in the out stanza.

Also add a note by the calls manipulating the gc, to note that as this
is an internal function, the gc should really be set up and destroyed
by its caller.  But let's not do that at this stage of the 4.1 release
cycle.

Signed-off-by: Ian Jackson <Ian.Jackson@eu.citrix.com>
Acked-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
Committed-by: Ian Jackson <ian.jackson@eu.citrix.com>
2011-01-28 18:34:52 +00:00
Stefano Stabellini 1b1d0b8b75 tools: Change the name of the qemu save file at restore time
Change the name of the qemu save file to qemu-resume at restore time so
that it doesn't collide with the name of the next save file.

Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
Acked-by: Ian Jackson <ian.jackson@eu.citrix.com>
Committed-by: Ian Jackson <ian.jackson@eu.citrix.com>
2011-01-21 17:57:31 +00:00
Ian Jackson e1e6f0f906 libxl: Fix for Windows UP crash on boot using xl
When parameter "vcpus" is not explicitly set in config file, cur_vpus
is initialized to 0 instead of 1, which causes domU crash.

Signed-off-by: Fengzhe Zhang <fengzhe.zhang@intel.com>
Signed-off-by: Ian Jackson <ian.jackson@eu.citrix.com>
Committed-by: Ian Jackson <ian.jackson@eu.citrix.com>
2011-01-21 17:45:56 +00:00
Gianni Tedesco 9bdd55b787 libxl: move domain struct init functions from xl to libxl
This allows libxl users to get some sane default values for this complex
set of structures. This is purely code movement and there are no
functional changes except for a trivial error handling change in nic
device init.

Signed-off-by: Gianni Tedesco <gianni.tedesco@citrix.com>
Committed-by: Ian Jackson <ian.jackson@eu.citrix.com>
2011-01-11 18:32:32 +00:00