Commit Graph

753 Commits

Author SHA1 Message Date
Bo Chen
7c3e19c65a vhost_user_backend, vmm: Close leaked file descriptors
Explicit call to 'close()' is required on file descriptors allocated
from 'epoll::create()', which is missing for the 'EpollContext' and
'VringWorker'. This patch enforces to close the file descriptors by
reusing the Drop trait of the 'File' struct.

Signed-off-by: Bo Chen <chen.bo@intel.com>
2020-05-19 09:22:09 +02:00
Rob Bradford
1b8b5ac179 vhost-user_net, vm-virtio, vmm: Permit host MAC address setting
Add a new "host_mac" parameter to "--net" and "--net-backend" and use
this to set the MAC address on the tap interface. If no address is given
one is randomly assigned and is stored in the config.

Support for vhost-user-net self spawning was also included.

Fixes: #1177

Signed-off-by: Rob Bradford <robert.bradford@intel.com>
2020-05-15 11:45:09 +01:00
Rob Bradford
11049401ce vmm: seccomp: Add ioctl() commands interface hardware address
This is necessary to support setting the MAC address on the tap
interface on the host.

Signed-off-by: Rob Bradford <robert.bradford@intel.com>
2020-05-15 11:45:09 +01:00
Sebastien Boeuf
68fc432978 vmm: Update seccomp filters with clock_nanosleep
The clock_nanosleep system call needs to be whitelisted since the commit
12e00c0f45 introduced the use of a sleep()
function. Without this patch, we can see an error when the VM is paused
or killed.

Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
2020-05-15 12:34:53 +02:00
Rob Bradford
6aa29bdb24 vmm: api: Use a common handler for data actions too
Like the actions that don't take data such as "pause" or "resume" use a
common handler implementation to remove duplicated code for handling
simple endpoints like the hotplug ones.

Signed-off-by: Rob Bradford <robert.bradford@intel.com>
2020-05-14 16:55:51 +01:00
Rob Bradford
0fe223f00e vmm: api: Extend VmAction to reduce code duplication
Many of the API requests take a similar form with a single data item
(i.e. config for a device hotplug) expand the VmAction enum to handle
those actions and a single function to dispatch those API events.

For now port the existing helper functions to use this new API. In the
future the HTTP layer can create the VmAction directly avoiding the
extra layer of indirection.

Signed-off-by: Rob Bradford <robert.bradford@intel.com>
2020-05-14 16:55:51 +01:00
Rob Bradford
6ec605a7fb vmm: api: Refactor generic action handler
Rather than save the save a function pointer and use that instead the
underlying action. This is useful for two reasons:

1. We can ensure that we generate HttpErrors in the same way as the
   other endpoints where API error variant should be determined by the
   request being made not the underlying error.
2. It can be extended to handle other generic actions where the function
   prototype differs slightly.

As result of this refactoring it was found that the "vm.delete" endpoint
was not connected so address that issue.

Signed-off-by: Rob Bradford <robert.bradford@intel.com>
2020-05-14 16:55:51 +01:00
Rob Bradford
c652625beb vmm: api: Add a default implementation for simple PUT requests
Extend the EndpointHandler trait to include automatic support for
handling PUT requests. This will allow the removal of lots of duplicated
code in the following commit from the API handling code.

Signed-off-by: Rob Bradford <robert.bradford@intel.com>
2020-05-14 16:55:51 +01:00
Rob Bradford
a3e8bea03c vmm: api: Move HttpError enum to http module
Minor rearrangement of code to make it easier to implement refactoring.

Signed-off-by: Rob Bradford <robert.bradford@intel.com>
2020-05-14 16:55:51 +01:00
Rob Bradford
9ccc7daa83 build, vmm: Update to latest kvm-ioctls
The ch branch has been rebased to incorporate the latest upstream code
requiring a small change to the unit tests.

Signed-off-by: Rob Bradford <robert.bradford@intel.com>
2020-05-13 17:14:49 +02:00
Rob Bradford
88ec93d075 vmm: config: Add missing "id" from FsConfig parsing
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
2020-05-13 09:11:50 +01:00
dependabot-preview[bot]
2991fd2a48 build(deps): bump libc from 0.2.69 to 0.2.70
Bumps [libc](https://github.com/rust-lang/libc) from 0.2.69 to 0.2.70.
- [Release notes](https://github.com/rust-lang/libc/releases)
- [Commits](https://github.com/rust-lang/libc/compare/0.2.69...0.2.70)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>
2020-05-12 20:26:43 +02:00
Sebastien Boeuf
c37da600e8 vmm: Update DeviceTree upon PCI BAR reprogramming
By passing a reference of the DeviceTree to the AddressManager, we can
now update the DeviceTree whenever a PCI BAR is reprogrammed. This is
mandatory to maintain the correct resources information related to each
virtio-pci device, which will ensure correct information will be stored
upon VM snapshot.

Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
2020-05-12 17:37:31 +01:00
Sebastien Boeuf
d0ae9d7ce6 vmm: Share the DeviceTree across threads
We want to be able to share the same DeviceTree across multiple threads,
particularly to handle the use case where PCI BAR reprogramming might
need to update the tree while from another thread a new device is being
added to the tree.

That's why this patch moves the DeviceTree instance into an Arc<Mutex<>>
so that we can later share a reference of the same mutable tree with the
AddressManager responsible for handling PCI BAR reprogramming.

Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
2020-05-12 17:37:31 +01:00
Sebastien Boeuf
5e9d254564 vmm: Store and restore virtio-pci BAR resources
By using the vector of resources provided by the DeviceNode, the device
manager can store the information related to PCI BARs from a virtio-pci
device. Based on this, and upon VM restoration, the device manager can
restore the BARs in the expected location in the guest address space.

One thing to note is that we only need to provide the VirtioPciDevice
with the configuration BAR (BAR 0) since the SHaredMemory BAR info comes
from the virtio device directly.

Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
2020-05-12 17:37:31 +01:00
Sebastien Boeuf
8a826ae24c vmm: Store and restore virtio-pci device on right PCI slot
Based on the new field "pci_bdf", a virtio-pci device can be restored at
the same place on the PCI bus it was located before the VM snapshot.

This ensures consistent placement on the PCI bus, based on the stored
information related to each device.

Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
2020-05-12 17:37:31 +01:00
Sebastien Boeuf
98dac352b8 vmm: Add optional PCI b/d/f to each DeviceNode
We need a way to store the information about where a PCI device was
placed on the PCI bus before the VM was snapshotted. The way to do this
is by adding an extra field to the DeviceNode structure.

Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
2020-05-12 17:37:31 +01:00
Rob Bradford
b9ba81c30d arch, vmm: Don't build mptable when using ACPI
Use the ACPI feature to control whether to build the mptable. This is
necessary as the mptable and ACPI RSDP table can easily overwrite each
other leading to it failing to boot.

TEST=Compile with default features and see that --cpus boot=48 now
works, try with --no-default-features --features "pci" and observe the
--cpus boot=48 also continues to work.

Fixes: #1132

Signed-off-by: Rob Bradford <robert.bradford@intel.com>
2020-05-11 19:34:34 +01:00
dependabot-preview[bot]
1c44e917f9 build(deps): bump clap from 2.33.0 to 2.33.1
Bumps [clap](https://github.com/clap-rs/clap) from 2.33.0 to 2.33.1.
- [Release notes](https://github.com/clap-rs/clap/releases)
- [Changelog](https://github.com/clap-rs/clap/blob/v2.33.1/CHANGELOG.md)
- [Commits](https://github.com/clap-rs/clap/compare/v2.33.0...v2.33.1)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>
2020-05-11 20:15:13 +02:00
dependabot-preview[bot]
4cd2eccf2f build(deps): bump signal-hook from 0.1.14 to 0.1.15
Bumps [signal-hook](https://github.com/vorner/signal-hook) from 0.1.14 to 0.1.15.
- [Release notes](https://github.com/vorner/signal-hook/releases)
- [Changelog](https://github.com/vorner/signal-hook/blob/master/CHANGELOG.md)
- [Commits](https://github.com/vorner/signal-hook/compare/v0.1.14...v0.1.15)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>
2020-05-11 20:15:03 +02:00
Rob Bradford
5016fcf8d5 vhost_user_block: Use config::OptionParser to simplify block backend parsing
Switch to using the recently added OptionParser in the code that parses
the block backend.

Fixes: #1092

Signed-off-by: Rob Bradford <robert.bradford@intel.com>
2020-05-11 09:40:40 +02:00
Rob Bradford
592de97fbd vhost_user_net: Use config::OptionParser to simplify net backend parsing
Switch to using the recently added OptionParser in the code that parses
the network backend.

Whilst doing this also update the net-backend syntax to use "sock"
rather than socket.

Fixes: #1092
Partially fixes: #1091

Signed-off-by: Rob Bradford <robert.bradford@intel.com>
2020-05-11 09:40:40 +02:00
Rob Bradford
12e00c0f45 vmm: cpu: Retry sending signals if necessary
To avoid a race condition where the signal might "miss" the KVM_RUN
ioctl() instead reapeatedly try sending a signal until the vCPU run is
interrupted (as indicated by setting a new per vCPU atomic.)

It important to also clear this atomic when coming out of a paused
state.

Signed-off-by: Rob Bradford <robert.bradford@intel.com>
2020-05-07 09:00:14 +02:00
Rob Bradford
31bde4f5da vmm: Unpark the DeviceManager threads in shutdown
To ensure that the DeviceManager threads (such as those used for virtio
devices) are cleaned up it is necessary to unpark them so that they get
cleanly terminated as part of the shutdown.

Signed-off-by: Rob Bradford <robert.bradford@intel.com>
2020-05-07 09:00:14 +02:00
Rob Bradford
801e72ac6d vmm: cpu: Unpause vCPU threads
After setting the kill signal flag for the vCPU thread release the pause
flag and unpark the threads. This ensures that that the vCPU thread will
wake up and check the kill signal flag if the VM is paused.

Signed-off-by: Rob Bradford <robert.bradford@intel.com>
2020-05-07 09:00:14 +02:00
Rob Bradford
91a4a2581e vmm: cpu: When coming out of the pause event check for a kill signal
Rather than immediately entering the vCPU run() code check if the kill
signal is set. This allows paused VMs to be shutdown.

Signed-off-by: Rob Bradford <robert.bradford@intel.com>
2020-05-07 09:00:14 +02:00
Rob Bradford
cd60de8f7f Revert "vmm: vm: Unpark the threads before shutdown when the current state is paused"
This reverts commit e1a07ce3c4.

Signed-off-by: Rob Bradford <robert.bradford@intel.com>
2020-05-07 09:00:14 +02:00
Sebastien Boeuf
f6a71bec36 vmm: Add unit tests for DeviceTree
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
2020-05-05 16:08:42 +02:00
Sebastien Boeuf
64e01684f9 vmm: Create new module device_tree
This module will be dedicated to DeviceNode and DeviceTree definitions
along with some dedicated unit tests.

Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
2020-05-05 16:08:42 +02:00
Sebastien Boeuf
3b77be903d vmm: Add device_node!() macro to improve code readability
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
2020-05-05 16:08:42 +02:00
Sebastien Boeuf
83ec716ec4 vmm: Create breadth-first search iterator for the DeviceTree
This iterator will let the VMM enumerate the resources associated
with the DeviceManager, allowing for introspection.

Moreover, by implementing a double ended iterator, we can get the
hierarchy from the leaves to the root of the tree, which is very
helpful in the context of restoring the devices in the right order.

Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
2020-05-05 16:08:42 +02:00
Sebastien Boeuf
b91ab1e3a5 vmm: Remove the list of migratable devices
Now that the device tree fully replaced the need for a dedicated list of
migratable devices, this commit cleans up the codebase by removing it
from the DeviceManager.

Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
2020-05-05 16:08:42 +02:00
Sebastien Boeuf
1be7037229 vmm: Don't use migratable_devices for restore
This commit switches from migratable_devices to device_tree in order to
restore devices exclusively based on the device tree.

Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
2020-05-05 16:08:42 +02:00
Sebastien Boeuf
bc6084390f vmm: Add migratable field to the DeviceNode
This commit adds an extra field to the DeviceNode so that the structure
can hold a Migratable device. The long term plan is to be able to remove
the dedicated table of migratable devices, but instead rely only on the
device tree.

Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
2020-05-05 16:08:42 +02:00
Sebastien Boeuf
7fec020f53 vmm: Create a dedicated DeviceTree structure
In order to hide the complexity chosen for the device tree stored in
the DeviceManager, we introduce a new DeviceTree structure.

For now, this structure is a simple passthrough of a HashMap, but it can
be extended to handle some DeviceTree specific operations.

Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
2020-05-05 16:08:42 +02:00
Sebastien Boeuf
14b379dec5 vmm: Add an identifier field to DeviceNode structure
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
2020-05-05 16:08:42 +02:00
Sebastien Boeuf
0805d458c4 vmm: Add support for multiple children per DeviceNode
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
2020-05-05 16:08:42 +02:00
Sebastien Boeuf
daaeba5142 vmm: Change Node into DeviceNode
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
2020-05-05 16:08:42 +02:00
Sebastien Boeuf
5c7df03efe vmm: Store and restore virtio-pmem resources
This device has a dedicated memory region in the guest address space,
which means in case of snapshot/restore, it must be restored in the
exact same location it was during the snapshot.

That's through the resources that we can describe the location of this
extra memory region, allowing the device for correct restoring.

Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
2020-05-05 16:08:42 +02:00
Sebastien Boeuf
2e6895d911 vmm: Store and restore virtio-fs resources
This device has a dedicated memory region in the guest address space,
which means in case of snapshot/restore, it must be restored in the
exact same location it was during the snapshot.

That's through the resources that we can describe the location of this
extra memory region, allowing the device for correct restoring.

Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
2020-05-05 16:08:42 +02:00
Sebastien Boeuf
987f82152e vmm: Store and restore virtio-mmio resources
Based on the device tree, retrieve the resources associated with a
virtio-mmio device to restore it at the right location in guest address
space. Also, the IRQ number is correctly restored.

Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
2020-05-05 16:08:42 +02:00
Sebastien Boeuf
9cb1e1cc6b vmm: Perform MMIO allocation from virtio-mmio device creation
Instead of splitting the MMIO allocation and the device creation into
separate functions for virtio-mmio devices, it's is easier to move
everything into the same function as we'll be able to gather resources
in the same place for the same device.

These resources will be stored in the device tree in a follow up patch.

Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
2020-05-05 16:08:42 +02:00
Sebastien Boeuf
adf297066d vmm: Create devices in different path if restoring the VM
In case the VM is created from scratch, the devices should be created
after the DeviceManager has been created. But this should not affect the
restore codepath, as in this case the devices should be created as part
of the restore() function.

It's necessary to perform this differentiation as the restore must go
through the following steps:
- Create the DeviceManager
- Restore the DeviceManager with the right state
- Create the devices based on the restored DeviceManager's device tree
- Restore each device based on the restored DeviceManager's device tree

That's why this patch leverages the recent split of the DeviceManager's
creation to achieve what's needed.

Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
2020-05-05 16:08:42 +02:00
Sebastien Boeuf
d39f91de02 vmm: Reorganize DeviceManager creation
This commit performs the split of the DeviceManager's creation into two
separate functions by moving anything related to device's creation after
the DeviceManager structure has been initialized.

Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
2020-05-05 16:08:42 +02:00
Sebastien Boeuf
89c2a5868c vmm: Restore devices following the device tree
Based on the device tree, we now ensure the restore can be done in the
right order, as it will respect the dependencies between nodes.

Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
2020-05-05 16:08:42 +02:00
Sebastien Boeuf
52c80cfcf5 vmm: Snapshot and restore DeviceManager state
The DeviceManager itself must be snapshotted in order to store the
information regarding the devices associated with it, which effectively
means we need to store the device tree.

The mechanics to snapshot and restore the DeviceManagerState are added
to the existing snapshot() and restore() implementations.

Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
2020-05-05 16:08:42 +02:00
Sebastien Boeuf
5b408eec66 vmm: Create a device tree
The DeviceManager now creates a tree of devices in order to store the
resources associated with each device, but also to track dependencies
between devices.

This is a key part for proper introspection, but also to support
snapshot and restore correctly.

Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
2020-05-05 16:08:42 +02:00
Rob Bradford
fec97e0586 vm-virtio, vmm: Delete unix socket on shutdown
It's not possible to call UnixListener::Bind() on an existing file so
unlink the created socket when shutting down the Vsock device.

This will allow the VM to be rebooted with a vsock device.

Fixes: #1083

Signed-off-by: Rob Bradford <robert.bradford@intel.com>
2020-05-05 13:01:38 +02:00
Rob Bradford
5109f914eb vmm: config: Reject attempts to use VFIO or IOMMU without PCI
Generate an error during validation if an attempt it made to place a
device behind an IOMMU or using a VFIO device when not using PCI.

Fixes: #751

Signed-off-by: Rob Bradford <robert.bradford@intel.com>
2020-05-05 11:20:52 +01:00
dependabot-preview[bot]
5571c6af2d build(deps): bump signal-hook from 0.1.13 to 0.1.14
Bumps [signal-hook](https://github.com/vorner/signal-hook) from 0.1.13 to 0.1.14.
- [Release notes](https://github.com/vorner/signal-hook/releases)
- [Changelog](https://github.com/vorner/signal-hook/blob/master/CHANGELOG.md)
- [Commits](https://github.com/vorner/signal-hook/compare/v0.1.13...v0.1.14)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>
2020-05-02 19:01:33 +01:00