diff options
author | sephe <sephe@FreeBSD.org> | 2017-01-05 03:20:00 +0000 |
---|---|---|
committer | sephe <sephe@FreeBSD.org> | 2017-01-05 03:20:00 +0000 |
commit | 3b0ec971272f0d0cff6456302098876f14e313ac (patch) | |
tree | 8303a1576c629bb2073017c0299360cd37861a53 /include | |
parent | 940f4f6a0f99fc1b68f891f638297161f27de9f7 (diff) | |
download | FreeBSD-src-3b0ec971272f0d0cff6456302098876f14e313ac.zip FreeBSD-src-3b0ec971272f0d0cff6456302098876f14e313ac.tar.gz |
MFC 308664,308742,308743
308664
hyperv/vss: Add driver and tools for VSS
VSS stands for "Volume Shadow Copy Service". Unlike virtual machine
snapshot, it only takes snapshot for the virtual disks, so both
filesystem and applications have to aware of it, and cooperate the
whole VSS process.
This driver exposes two device files to the userland:
/dev/hv_fsvss_dev
Normally userland programs should _not_ mess with this device file.
It is currently used by the hv_vss_daemon(8), which freezes and
thaws the filesystem. NOTE: currently only UFS is supported, if
the system mounts _any_ other filesystems, the hv_vss_daemon(8)
will veto the VSS process.
If hv_vss_daemon(8) was disabled, then this device file must be
opened, and proper ioctls must be issued to keep the VSS working.
/dev/hv_appvss_dev
Userland application can opened this device file to receive the
VSS freeze notification, hold the VSS for a while (mainly to flush
application data to filesystem), release the VSS process, and
receive the VSS thaw notification i.e. applications can run again.
The VSS will still work, even if this device file is not opened.
However, only filesystem consistency is promised, if this device
file is not opened or is not operated properly.
hv_vss_daemon(8) is started by devd(8) by default. It can be disabled
by editting /etc/devd/hyperv.conf.
Submitted by: Hongjiang Zhang <honzhan microsoft com>
Reviewed by: kib, mckusick
Sponsored by: Microsoft
Differential Revision: https://reviews.freebsd.org/D8224
308742
hyperv/vss: Nuke unused variables.
Submitted by: markj
Reported by: markj
Sponsored by: Microsoft
308743
hyperv/vss: Install the userland daemon to /usr/sbin instead of /
Submitted by: markj
Reported by: markj
Sponsored by: Microsoft
Diffstat (limited to 'include')
-rw-r--r-- | include/Makefile | 14 |
1 files changed, 11 insertions, 3 deletions
diff --git a/include/Makefile b/include/Makefile index 0675bf2..29f0767 100644 --- a/include/Makefile +++ b/include/Makefile @@ -44,7 +44,7 @@ LDIRS= bsm cam geom net net80211 netgraph netinet netinet6 \ LSUBDIRS= cam/ata cam/nvme cam/scsi \ dev/acpica dev/agp dev/an dev/bktr dev/ciss dev/filemon dev/firewire \ - dev/hwpmc \ + dev/hwpmc dev/hyperv \ dev/ic dev/iicbus dev/io dev/lmc dev/mfi dev/nvme \ dev/ofw dev/pbio dev/pci ${_dev_powermac_nvram} dev/ppbus dev/smbus \ dev/speaker dev/utopia dev/vkbd dev/wi \ @@ -154,7 +154,7 @@ copies: .PHONY .META done; \ fi .endfor -.for i in ${LDIRS} ${LSUBDIRS:Ndev/agp:Ndev/acpica:Ndev/bktr:Ndev/evdev:Ndev/nand:Ndev/pci} ${LSUBSUBDIRS} +.for i in ${LDIRS} ${LSUBDIRS:Ndev/agp:Ndev/acpica:Ndev/bktr:Ndev/evdev:Ndev/hyperv:Ndev/nand:Ndev/pci} ${LSUBSUBDIRS} cd ${.CURDIR}/../sys; \ ${INSTALL} -C ${TAG_ARGS} -o ${BINOWN} -g ${BINGRP} -m 444 $i/*.h \ ${DESTDIR}${INCLUDEDIR}/$i @@ -184,6 +184,9 @@ copies: .PHONY .META ${DESTDIR}${INCLUDEDIR}/dev/evdev; \ ${INSTALL} -C -o ${BINOWN} -g ${BINGRP} -m 444 uinput.h \ ${DESTDIR}${INCLUDEDIR}/dev/evdev + cd ${.CURDIR}/../sys/dev/hyperv/utilities; \ + ${INSTALL} -C ${TAG_ARGS} -o ${BINOWN} -g ${BINGRP} -m 444 hv_snapshot.h \ + ${DESTDIR}${INCLUDEDIR}/dev/hyperv cd ${.CURDIR}/../sys/dev/pci; \ ${INSTALL} -C ${TAG_ARGS} -o ${BINOWN} -g ${BINGRP} -m 444 pcireg.h \ ${DESTDIR}${INCLUDEDIR}/dev/pci @@ -256,7 +259,7 @@ symlinks: .PHONY .META ${INSTALL_SYMLINK} ${TAG_ARGS} ../../../sys/$i/$$h ${DESTDIR}${INCLUDEDIR}/$i; \ done .endfor -.for i in ${LSUBDIRS:Ndev/agp:Ndev/acpica:Ndev/bktr:Ndev/evdev:Ndev/nand:Ndev/pci} +.for i in ${LSUBDIRS:Ndev/agp:Ndev/acpica:Ndev/bktr:Ndev/evdev:Ndev/hyperv:Ndev/nand:Ndev/pci} cd ${.CURDIR}/../sys/$i; \ for h in *.h; do \ ${INSTALL_SYMLINK} ${TAG_ARGS} ../../../../sys/$i/$$h ${DESTDIR}${INCLUDEDIR}/$i; \ @@ -289,6 +292,11 @@ symlinks: .PHONY .META ln -fs ../../../../sys/dev/evdev/$$h \ ${DESTDIR}${INCLUDEDIR}/dev/evdev; \ done + cd ${.CURDIR}/../sys/dev/hyperv/utilities; \ + for h in hv_snapshot.h; do \ + ${INSTALL_SYMLINK} ${TAG_ARGS} ../../../../sys/dev/hyperv/utilities/$$h \ + ${DESTDIR}${INCLUDEDIR}/dev/hyperv; \ + done cd ${.CURDIR}/../sys/dev/pci; \ for h in pcireg.h; do \ ${INSTALL_SYMLINK} ${TAG_ARGS} ../../../../sys/dev/pci/$$h \ |