311353 |
05-Jan-2017 |
sephe |
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 |
291563 |
01-Dec-2015 |
bdrewery |
META MODE: Update dependencies with 'the-lot' and add missing directories.
This is not properly respecting WITHOUT or ARCH dependencies in target/. Doing so requires a massive effort to rework targets/ to do so. A better approach will be to either include the SUBDIR Makefiles directly and map to DIRDEPS or just dynamically lookup the SUBDIR. These lose the benefit of having a userland/lib, userland/libexec, etc, though and results in a massive package. The current implementation of targets/ is very unmaintainable.
Currently rescue/rescue and sys/modules are still not connected.
Sponsored by: EMC / Isilon Storage Division
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271493 |
13-Sep-2014 |
delphij |
Import HyperV Key-Value Pair (KVP) driver and daemon code by Microsoft, many thanks for their continued support of FreeBSD.
While I'm there, also implement a new build knob, WITHOUT_HYPERV to disable building and installing of the HyperV utilities when necessary.
The HyperV utilities are only built for i386 and amd64 targets.
This is a stable/10 candidate for inclusion with 10.1-RELEASE.
Submitted by: Wei Hu <weh microsoft com> MFC after: 1 week
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