This is required to enable capsicum for the snapshot code.
Reviewed by: corvink
Sponsored by: vStack
Differential Revision: https://reviews.freebsd.org/D38858
This is a userland-only pointer that isn't relevant to the kernel and
doesn't belong in the ioctl structure shared between userland and the
kernel. For the kernel, the old structure for the ioctl is still
supported under COMPAT_FREEBSD13.
This changes vm_snapshot_req() in libvmmapi to accept an explicit
vmctx argument.
It also changes vm_snapshot_guest2host_addr to take an explicit vmctx
argument. As part of this change, move the declaration for this
function and its wrapper macro from vmm_snapshot.h to snapshot.h as it
is a userland-only API.
Reviewed by: corvink, markj
Differential Revision: https://reviews.freebsd.org/D38125
This replaces the 'struct vm, int vcpuid' tuple passed to most API
calls and is similar to the changes recently made in vmm(4) in the
kernel.
struct vcpu is an opaque type managed by libvmmapi. For now it stores
a pointer to the VM context and an integer id.
As an immediate effect this removes the divergence between the kernel
and userland for the instruction emulation code introduced by the
recent vmm(4) changes.
Since this is a major change to the vmmapi API, bump VMMAPI_VERSION to
0x200 (2.0) and the shared library major version.
While here (and since the major version is bumped), remove unused
vcpu argument from vm_setup_pptdev_msi*().
Add new functions vm_suspend_all_cpus() and vm_resume_all_cpus() for
use by the debug server. The underyling ioctl (which uses a vcpuid of
-1) remains unchanged, but the userlevel API now uses separate
functions for global CPU suspend/resume.
Reviewed by: corvink, markj
Differential Revision: https://reviews.freebsd.org/D38124
vmx_snapshot() and svm_snapshot() do not save any data and error occurs at
resume:
Restoring kernel structs...
vm_restore_kern_struct: Kernel struct size was 0 for: vmx
Failed to restore kernel structs.
Reviewed by: corvink, markj
Fixes: 39ec056e6d ("vmm: Rework snapshotting of CPU-specific per-vCPU data.")
MFC after: 2 weeks
Sponsored by: vStack
Differential Revision: https://reviews.freebsd.org/D38476
Most of these arguments were unused. Device models which do need
access to the vmctx in one of these methods can obtain it from the
pi_vmctx member of the pci_devinst argument instead.
Reviewed by: corvink, markj
Differential Revision: https://reviews.freebsd.org/D38096
They accomplish nothing since the qualifier is casted away in calls to
memcpy() and copyin()/copyout(). No functional change intended.
MFC after: 2 weeks
Reviewed by: corvink, jhb
Differential Revision: https://reviews.freebsd.org/D37292
- Qualify unexported symbols with "static".
- Drop some unnecessary and incorrect casts.
- Avoid arithmetic on void pointers.
- Avoid signed/unsigned comparisons in loops which use nitems() as a
bound.
No functional change intended.
MFC after: 1 week
Now that nvlist_send()/nvlist_recv() are being used, ditch the datagram
socket.
Reviewed by: markj
Differential Revision: https://reviews.freebsd.org/D34863
NAME_MAX is a better fit since strcat_extension() constructs the
filename of the snapshot file.
Reviewed by: markj
Differential Revision: https://reviews.freebsd.org/D34291
Allows callers of vm_get_name() to retrieve the vm name without having
to allocate a buffer.
While in the vicinity, do minor cleanup in vm_snapshot_basic_metadata().
Reviewed by: jhb
Differential Revision: https://reviews.freebsd.org/D34290
The nvlist for a checkpoint request will now look like:
{ cmd="checkpoint", suspend="true/false", filename="afilename" }
Reviewed by: jhb
Suggested by: jhb
Differential Revision: https://reviews.freebsd.org/D34237
Switch to using an nvlist with nvlist_send()/nvlist_recv() to
communicate from bhyvectl(8) to bhyve(8).
The idea is that a bhyve process receives a command with with a set of
arguments. The nvlist here is structured to reflect that premise.
For example, to snapshot the vm, the expected nvlist looks like:
{ cmd=START_CHECKPOINT, filename="filename" }
Reviewed by: markj
Differential Revision: https://reviews.freebsd.org/D33977
pthread_create() returns 0 on success or an error number on failure.
Reviewed by: khng, markj
Differential Revision: https://reviews.freebsd.org/D33930
Move initialization of the mutex/condition variables required by the
save/restore feature to their own function.
The unix domain socket that facilitates communication between bhyvectl
and bhyve doesn't rely on these variables in order to be functional.
Reviewed by: markj
Differential Revision: https://reviews.freebsd.org/D30281
This is a step towards sending messages (other than suspend/checkpoint)
from bhyvectl to bhyve.
Introduce a new struct, ipc_message - this struct stores the type of
message and a union containing message specific structures for the type
of message being sent.
Reviewed by: grehan
Differential Revision: https://reviews.freebsd.org/D30221
The save/restore feature uses a unix domain socket to send messages
from bhyvectl(8) to a bhyve(8) process. A datagram socket will suffice
for this.
An added benefit of using a datagram socket is simplified code. For
bhyve, the listen/accept calls are dropped; and for bhyvectl, the
connect() call is dropped.
EPRINTLN handles raw mode for bhyve(8), use it to print error messages.
Reviewed by: jhb
Differential Revision: https://reviews.freebsd.org/D28983
Add /var/run/bhyve/ to BSD.var.dist so we don't have to call mkdir when
creating the unix domain socket for a given bhyve vm.
The path to the unix domain socket for a bhyve vm will now be
/var/run/bhyve/vmname instead of /var/run/bhyve/checkpoint/vmname
Move BHYVE_RUN_DIR from snapshot.c to snapshot.h so it can be shared
to bhyvectl(8).
Reviewed by: jhb
Differential Revision: https://reviews.freebsd.org/D28783
Now that bhyve(8) supports UART, bvmconsole and bvmdebug are no longer needed.
This also removes the '-b' and '-g' flag from bhyve(8). These two flags were
marked deprecated in r368519.
Reviewed by: grehan, kevans
Approved by: kevans (mentor)
Differential Revision: https://reviews.freebsd.org/D27490
This uses the same snapshot routine as other VirtIO devices.
Submitted by: Vitaliy Gusev <gusev.vitaliy@gmail.com>
Differential Revision: https://reviews.freebsd.org/D26265
Save and restore (also known as suspend and resume) permits a snapshot
to be taken of a guest's state that can later be resumed. In the
current implementation, bhyve(8) creates a UNIX domain socket that is
used by bhyvectl(8) to send a request to save a snapshot (and
optionally exit after the snapshot has been taken). A snapshot
currently consists of two files: the first holds a copy of guest RAM,
and the second file holds other guest state such as vCPU register
values and device model state.
To resume a guest, bhyve(8) must be started with a matching pair of
command line arguments to instantiate the same set of device models as
well as a pointer to the saved snapshot.
While the current implementation is useful for several uses cases, it
has a few limitations. The file format for saving the guest state is
tied to the ABI of internal bhyve structures and is not
self-describing (in that it does not communicate the set of device
models present in the system). In addition, the state saved for some
device models closely matches the internal data structures which might
prove a challenge for compatibility of snapshot files across a range
of bhyve versions. The file format also does not currently support
versioning of individual chunks of state. As a result, the current
file format is not a fixed binary format and future revisions to save
and restore will break binary compatiblity of snapshot files. The
goal is to move to a more flexible format that adds versioning,
etc. and at that point to commit to providing a reasonable level of
compatibility. As a result, the current implementation is not enabled
by default. It can be enabled via the WITH_BHYVE_SNAPSHOT=yes option
for userland builds, and the kernel option BHYVE_SHAPSHOT.
Submitted by: Mihai Tiganus, Flavius Anton, Darius Mihai
Submitted by: Elena Mihailescu, Mihai Carabas, Sergiu Weisz
Relnotes: yes
Sponsored by: University Politehnica of Bucharest
Sponsored by: Matthew Grooms (student scholarships)
Sponsored by: iXsystems
Differential Revision: https://reviews.freebsd.org/D19495
