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483d953a86
freebsd-dev/lib
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John Baldwin 483d953a86 Initial support for bhyve save and restore. 
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
2020-05-05 00:02:04 +00:00
..
atf Update Makefile.depend files 2019-12-11 17:37:53 +00:00
clang llvm: add a build knob for enabling assertions 2020-04-06 01:27:17 +00:00
csu Remove -mlong-calls vhen building arm libraries and llvm. 2020-03-10 06:49:43 +00:00
geom Remove support for geli(4) algorithms deprecated in r348206. 2020-04-15 00:14:50 +00:00
googletest Another round of attempting to squelch -Wdeprecated-declarations, which 2019-09-17 06:07:08 +00:00
kyua Install expected kyua docs. 2020-03-26 17:34:17 +00:00
lib80211 Update Makefile.depend files 2019-12-11 17:37:53 +00:00
libalias Update Makefile.depend files 2019-12-11 17:37:53 +00:00
libarchive MFV r358511,r358532: 2020-03-02 08:44:58 +00:00
libauditd libauditd: make it a PRIVATELIB 2020-04-19 02:20:39 +00:00
libbe Drop "All Rights Reserved" from all libbe/bectl files 2020-01-24 02:18:09 +00:00
libbearssl Add libbearssl 2019-02-26 05:59:22 +00:00
libbegemot Update Makefile.depend files 2019-12-11 17:37:53 +00:00
libblacklist Update Makefile.depend files 2019-12-11 17:37:53 +00:00
libblocksruntime Move all sources from the llvm project into contrib/llvm-project. 2019-12-20 19:53:05 +00:00
libbluetooth Update Makefile.depend files 2019-12-11 17:37:53 +00:00
libbsdstat Update Makefile.depend files 2019-12-11 17:37:53 +00:00
libbsm libbsm: fix some MLINKS 2020-04-19 02:18:40 +00:00
libbsnmp Merge release 1.14 of bsnmp. 2020-04-01 15:25:16 +00:00
libbz2 Update Makefile.depend files 2019-12-11 17:37:53 +00:00
libc Remove the SYMVER build option. 2020-04-30 22:08:40 +00:00
libc_nonshared
libc++ Remove -mlong-calls vhen building arm libraries and llvm. 2020-03-10 06:49:43 +00:00
libc++experimental Move all sources from the llvm project into contrib/llvm-project. 2019-12-20 19:53:05 +00:00
libcalendar Update Makefile.depend files 2019-12-11 17:37:53 +00:00
libcam Remove unused cam ccb flags 2020-03-10 23:58:41 +00:00
libcapsicum capsicum_helpers: split stream cap bits out of caph_limit_stream() 2020-01-02 23:07:45 +00:00
libcasper cap_dns.3: fix some orphan .Xr links 2020-04-18 20:13:43 +00:00
libclang_rt Update build glue for libclang_rt. 2020-01-27 20:46:26 +00:00
libcom_err Update Makefile.depend files 2019-12-11 17:37:53 +00:00
libcompat ftime appeared in 7th Edition Unix to replace gtime. 2018-10-28 02:58:15 +00:00
libcompiler_rt Merge ^/head r357662 through r357854. 2020-02-13 12:52:24 +00:00
libcrypt Update Makefile.depend files 2019-12-11 17:37:53 +00:00
libcuse Update Makefile.depend files 2019-12-11 17:37:53 +00:00
libcxxrt Revert r353140: Re-add ALLOW_MIPS_SHARED_TEXTREL, sprinkle it around 2020-01-14 17:50:13 +00:00
libdevctl Update Makefile.depend files 2019-12-11 17:37:53 +00:00
libdevdctl libdevdctl: g++9 avoid Wdeprecated-copy 2019-12-21 02:44:26 +00:00
libdevinfo Update Makefile.depend files 2019-12-11 17:37:53 +00:00
libdevstat Update Makefile.depend files 2019-12-11 17:37:53 +00:00
libdl
libdpv Update Makefile.depend files 2019-12-11 17:37:53 +00:00
libdwarf Update Makefile.depend files 2019-12-11 17:37:53 +00:00
libedit Update Makefile.depend files 2019-12-11 17:37:53 +00:00
libefivar Update Makefile.depend files 2019-12-11 17:37:53 +00:00
libelf Update Makefile.depend files 2019-12-11 17:37:53 +00:00
libelftc Update ELF Tool Chain to upstream r3769 2019-12-05 13:20:15 +00:00
libevent Update Makefile.depend files 2019-12-11 17:37:53 +00:00
libexecinfo Move all sources from the llvm project into contrib/llvm-project. 2019-12-20 19:53:05 +00:00
libexpat Update Makefile.depend files 2019-12-11 17:37:53 +00:00
libfetch fetch(3): plug some leaks 2020-02-21 18:21:57 +00:00
libfigpar Update Makefile.depend files 2019-12-11 17:37:53 +00:00
libgcc_eh Revert r353140: Re-add ALLOW_MIPS_SHARED_TEXTREL, sprinkle it around 2020-01-14 17:50:13 +00:00
libgcc_s Remove the SYMVER build option. 2020-04-30 22:08:40 +00:00
libgeom Update Makefile.depend files 2019-12-11 17:37:53 +00:00
libgpio Update Makefile.depend files 2019-12-11 17:37:53 +00:00
libgssapi Update Makefile.depend files 2019-12-11 17:37:53 +00:00
libiconv_modules
libifconfig wlandebug: Add include path for libifconfig as it is a internallib 2020-03-25 01:31:26 +00:00
libipsec Remove support for IPsec algorithms deprecated in r348205 and r360202. 2020-05-02 00:06:58 +00:00
libipt Update Intel Processor Trace decoder library. 2019-10-10 12:46:34 +00:00
libjail libjail: Handle an error from reallocarray() when trimming the buffer. 2020-01-07 21:44:27 +00:00
libkiconv pkgbase: Put a lot of binaries and lib in FreeBSD-runtime 2019-09-05 14:13:08 +00:00
libkvm Remove swblk_t. 2020-02-17 15:11:07 +00:00
libldns Update Makefile.depend files 2019-12-11 17:37:53 +00:00
liblua liblua: ensure that "require" will fail in bootstrap flua 2020-04-29 13:41:32 +00:00
liblutok Add liblutok a lightweight C++ API for lua. 2020-03-23 18:26:23 +00:00
liblzma MFV r359197: xz 5.2.5. 2020-03-22 01:27:38 +00:00
libmagic MFV r357712: file 5.38. 2020-02-11 07:02:48 +00:00
libmd ANSIfy and KNF function arg definitions in libmd/md4.c 2020-04-03 20:56:43 +00:00
libmemstat Use per-domain locks for the bucket cache. 2020-02-19 18:48:46 +00:00
libmilter Update Makefile.depend files 2019-12-11 17:37:53 +00:00
libmp Update Makefile.depend files 2019-12-11 17:37:53 +00:00
libmt Update Makefile.depend files 2019-12-11 17:37:53 +00:00
libnetbsd Make timespecadd(3) and friends public 2018-07-30 15:46:40 +00:00
libnetgraph Update Makefile.depend files 2019-12-11 17:37:53 +00:00
libngatm Update Makefile.depend files 2019-12-11 17:37:53 +00:00
libnv Update Makefile.depend files 2019-12-11 17:37:53 +00:00
libomp Update build glue for libomp. 2020-01-27 18:04:28 +00:00
libopenbsd Allow bootstrapping libopenbsd on Linux 2018-12-05 10:58:02 +00:00
libopencsd Update Makefile.depend files 2019-12-11 17:37:53 +00:00
libopie Update Makefile.depend files 2019-12-11 17:37:53 +00:00
libpam pkgbase: Move telnetd and ftpd pam file to the utilities package 2020-03-24 01:08:06 +00:00
libpathconv
libpcap MFV r353141 (by phillip): 2019-12-21 21:01:03 +00:00
libpe
libpjdlog pkgbase: Create a FreeBSD-utilities package and make it the default one 2019-09-05 14:15:47 +00:00
libpmc Map family 0x5F (Denverton) to goldmont. 2020-04-24 16:05:35 +00:00
libpmcstat pmc: Add include path for libpmcstat as it is an internallib 2020-03-25 01:32:16 +00:00
libproc Temporarily skip 2 failing tests after llvm10 import 2020-03-11 12:43:54 +00:00
libprocstat Remove the SYMVER build option. 2020-04-30 22:08:40 +00:00
libradius libradius: Rip out dubious use of srandomdev(3)+random(3) 2019-12-13 04:55:17 +00:00
libregex Further normalize copyright notices 2019-09-26 16:19:22 +00:00
librpcsec_gss
librpcsvc Update Makefile.depend files 2019-12-11 17:37:53 +00:00
librss Update Makefile.depend files 2019-12-11 17:37:53 +00:00
librt pkgbase: Create a FreeBSD-utilities package and make it the default one 2019-09-05 14:15:47 +00:00
librtld_db Update Makefile.depend files 2019-12-11 17:37:53 +00:00
libsbuf Update Makefile.depend files 2019-12-11 17:37:53 +00:00
libsdp Update Makefile.depend files 2019-12-11 17:37:53 +00:00
libsecureboot Improve interaction of vectx and tftp 2020-04-07 16:56:34 +00:00
libsm
libsmb Move nsmb.conf to lib/libsmb/ 2018-09-20 09:31:27 +00:00
libsmdb
libsmutil
libsqlite3 Update Makefile.depend files 2019-12-11 17:37:53 +00:00
libssp libssp: don't compile with -fstack-protector* 2020-03-14 15:15:27 +00:00
libssp_nonshared Provide libssp based on libc 2020-01-04 20:19:25 +00:00
libstats Make use of the stats(3) framework in the TCP stack. 2019-12-02 20:58:04 +00:00
libstdbuf
libstdthreads Update Makefile.depend files 2019-12-11 17:37:53 +00:00
libsysdecode Retire procfs-based process debugging. 2020-04-01 19:22:09 +00:00
libtacplus libtacplus: Remove bogus srandomdev+random 2019-12-13 05:11:34 +00:00
libtelnet
libthr Remove libthr, csu, libthread_db and testfloat sparc64 specific directories. 2020-02-27 04:44:58 +00:00
libthread_db Remove libthr, csu, libthread_db and testfloat sparc64 specific directories. 2020-02-27 04:44:58 +00:00
libucl Update Makefile.depend files 2019-12-11 17:37:53 +00:00
libufs Update Makefile.depend files 2019-12-11 17:37:53 +00:00
libugidfw Update Makefile.depend files 2019-12-11 17:37:53 +00:00
libulog Update Makefile.depend files 2019-12-11 17:37:53 +00:00
libunbound Unbound's config.h is manually maintained, using a ./configure produced 2020-01-13 06:55:31 +00:00
libusb Fix for building libusb under Linux. 2020-03-10 15:59:20 +00:00
libusbhid Update Makefile.depend files 2019-12-11 17:37:53 +00:00
libutil login.conf(5): split MAIL env var out into a "mail" capability 2020-02-05 04:17:14 +00:00
libveriexec Do not claim libbearssl et al are INTERNALLIB 2020-04-01 05:45:12 +00:00
libvgl Update Makefile.depend files 2019-12-11 17:37:53 +00:00
libvmmapi Initial support for bhyve save and restore. 2020-05-05 00:02:04 +00:00
libwrap Update Makefile.depend files 2019-12-11 17:37:53 +00:00
libxo Import libxo-1.4.0: 2020-01-25 21:16:45 +00:00
liby
libypclnt Update Makefile.depend files 2019-12-11 17:37:53 +00:00
libz Update Makefile.depend files 2019-12-11 17:37:53 +00:00
libzstd Update Makefile.depend files 2019-12-11 17:37:53 +00:00
msun Fix typo 2020-04-04 07:43:47 +00:00
ncurses ncurses: bump shlib number to version 9 2020-02-20 09:12:07 +00:00
ofed Update Makefile.depend files 2019-12-11 17:37:53 +00:00
tests
Makefile Import the kyua test framework. 2020-03-23 19:01:23 +00:00
Makefile.inc