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
Now that RISC-V support has landed in qemu-user-static, add to the list
of examples in the binmiscctl(8) manpage.
Reviewed by: kevans
MFC after: 3 days
Differential Revision: https://reviews.freebsd.org/D24646
Bump CONFIGVERS to 600018 for this support.
Some files may purposely have debug info disabled or are *source files*
that attempt to run ctfconvert on them. Currently ctfconvert ignores
these errors but I have a change to make the errors real so we can
catch real problems like exceeding type limits.
Sponsored by: Dell EMC
Reviewed by: imp, cem, kevans
Differential Revision: https://reviews.freebsd.org/D24535
This behavior is most relevant for ipfw(4) as documented in syslog.conf(5).
The recent addition of property-based regex filters in r359327 is a
fine workaround for this but the behavior was present since 1997 and
documented.
This only fixes local matching of the "kernel program". It does not
change the forwarded format at all. On the remote side it will still
be "kernel: ipfw:" and not be parsed as a kernel message. This matches
old behavior.
MFC after: 2 weeks
Reviewed by: markj
Relnotes: yes
Differential Revision: https://reviews.freebsd.org/D24286
bhyve uses cached copies of the MSI capability registers to generate
MSI interrupts for device models. Previously, these cached fields
were only set when the MSI capability control register was updated.
The Linux kernel recently adopted a change to deal with races in MSI
interrupt delivery that writes to the MSI capability address and data
registers to alter the destination of MSI interrupts without writing
to the MSI capability control register. bhyve was not updating its
cached registers for these writes and continued to send interrupts
with the old data value to the old address. Fix this by recomputing
the cached values for every write to any MSI capability register.
Reported by: Jason Tubnor, Ryan Moeller
Reported by: Marc Dionne (bisected the Linux kernel commit)
Reviewed by: grehan
MFC after: 1 week
Differential Revision: https://reviews.freebsd.org/D24593
While at it use strtol() instead of atoi() to support hexadecimal
numbers aswell as 10-base numbers.
Submitted by: Marc Veldman <marc@bumblingdork.com>
PR: 245899
MFC after: 1 week
Sponsored by: Mellanox Technologies
With the inclusion of caroot bits, we'll need to also rehash on update as we
do in mergemaster/etcupdate.
If certctl's installed on the system, just unconditionally rehash. This
isn't an expensive operation, and we can refine it to compare
INDEX-{OLD,NEW} later if we really want to.
Reviewed by: emaste, allanjude
MFC after: 3 days
Differential Revision: https://reviews.freebsd.org/D21805
This will advertise support for TRIM to the guest virtio-blk driver and
perform the DIOCGDELETE ioctl on the backing storage if it supports it.
Thanks to Jason King and others at Joyent and illumos for expanding on
my original patch, adding improvements including better error handling
and making sure to following the virtio spec.
Submitted by: Jason King <jason.king@joyent.com> (improvements)
Reviewed by: jhb
Obtained from: illumos-joyent (improvements)
MFC after: 1 month
Relnotes: yes
Sponsored by: Klara Inc.
Differential Revision: https://reviews.freebsd.org/D21707
This patch is about sorting the arguments and using proper mdoc(7) macros
to stylize arguments and command modifiers for much better readability.
Further style fixes in other sections within the bhyve manual page are
going to be worked on in upcoming patches.
Reviewed by: rgrimes
MFC after: 1 week
Differential Revision: https://reviews.freebsd.org/D24526
Refer to bluetooth core v5.2 specifications Vol4. Part E. 7.8.27.
PR: 245763
Submitted by: Marc Veldman <marc@bumblingdork.com>
MFC after: 1 week
Sponsored by: Mellanox Technologies
The list of possible features in hccontrol/features2str() is incomplete.
Refer to "Bluetooth Core Specification 5.2 Vol. 2 Part C. 3.3 Feature Mask Definition".
Submitted by: Marc Veldman <marc@bumblingdork.com>
PR: 245354
MFC after: 1 week
Sponsored by: Mellanox Technologies
description for "jail -e" mode to show that it does not take
additional jail name argument.
Reported by: David Marec <david.marec@davenulle.org>
MFC after: 3 days
Print the failed instruction stream as a contiguous stream of hex. This
is closer to something you could throw at a disassembler than 0xHH 0xHH
0xHH.
Also, use the debug.h 'raw' stdio-aware printf helper to avoid the
cascading
line
effect.
Add an implementatation of the 'Virtual Machine Generation ID' spec to
Bhyve. The spec provides a randomly generated GUID (at bhyve start) in
device memory, along with an ACPI device with _CID VM_Gen_Counter and ADDR
evaluating to a Package pointing at that GUID.
A GPE is defined which Notifies the ACPI Device when the generation changes
(such as when a snapshot is rolled back). At this time, Bhyve does not
support snapshotting, so the GPE is never actually raised.
Suggested by: rpokala
Discussed with: grehan
Differential Revision: https://reviews.freebsd.org/D23165
To allow more general use of the bootrom region, separate initialization from
allocation, and allocation from loading a file.
The bootrom segment is the high 16MB of the low 4GB region.
Each allocation in the segment creates a new mapping with specified protection.
By default, allocation begins at the low end of the range. However, the
BOOTROM_ALLOC_TOP flag is provided to locate a provided bootrom in the high
region it is expected to be in.
The existing ROM-file loading code is refactored to use the new interface.
Reviewed by: grehan (earlier version)
Differential Revision: https://reviews.freebsd.org/D24422
GPIO drivers who supports interrupts report them in the caps
(obtain via the getcaps method) but gpioctl doesn't know
how to interpret this and print "UNKNOWN" for each one of them.
Even if we don't have userland gpio interrupts support for now
let gpioctl print the supported caps.
MFC after: 2 weeks
Differential Revision: https://reviews.freebsd.org/D24133
This uses DES and the kernel no longer supports DES for in-kernel GSS.
Reviewed by: kp
Relnotes: yes
Sponsored by: Chelsio Communications
Differential Revision: https://reviews.freebsd.org/D24345
The flag can be enabled using the new 'mtu' option:
bhyve -s X:Y:Z,virtio-net,[tapN|valeX:N],mtu=9000
Reported by: vmaffione, jhb
Approved by: vmaffione (mentor)
Differential Revision: https://reviews.freebsd.org/D23971
Recently added/changed lines in various kernel configs have caused some
buffer overflows that went undetected. These were detected with a config
built using -fno-common as these line buffers smashed one of our arrays,
then further triaged with ASAN.
Double the sizes; this is really not a great fix, but addresses the
immediate need until someone rewrites config. While here, add some bounds
checking so that we don't need to detect this by random bus errors or other
weird failures.
MFC after: 3 days
instead of sprinkling them out over many disjoint files. This is a follow-up
to achieve the same goal in an incomplete rev.348521.
Approved by: imp
MFC after: 1 month
Differential Revision: https://reviews.freebsd.org/D20520
This is mostly two problems spread out far and wide:
- ypldap_process should be declared properly
- debug is defined differently in many programs
For the latter, just extern it and define it everywhere that actually needs
it. This mostly works out nicely for ^/libexec/ypxfr, which can remove the
assignment at the beginning of main in favor of defining it properly.
-fno-common will become the default in GCC10/LLVM11.
MFC after: 3 days
Notably, the default IFS contains space/tab, thus any leading/trailing
whitespace characters tend to be removed.
Set IFS= for just the read lines to mitigate this, allowing the user to be
less surprised when their leading/trailing spaces weren't actually captured
in the password as they are with other means of setting a user's password.
PR: 245342
Submitted by: dereks_lifeofadishwasher.com
Reviewed by: jilles
MFC after: 1 week
Differential Revision: https://reviews.freebsd.org/D24292
jail(8) would try to use strcpy to remove the interface from the start of
an IP address. This is undefined, and on arm64 will result in unexpected
IPv6 addresses.
Fix this by using memmove top move the string.
PR: 245102
Reported by: sbruno
MFC after: 2 weeks
Sponsored by: Innovate UK
