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Etienne Dechamps b5a28807cd Move partition scanning from userspace to module. 
Currently, zpool online -e (dynamic vdev expansion) doesn't work on
whole disks because we're invoking ioctl(BLKRRPART) from userspace
while ZFS still has a partition open on the disk, which results in
EBUSY.

This patch moves the BLKRRPART invocation from the zpool utility to the
module. Specifically, this is done just before opening the device in
vdev_disk_open() which is called inside vdev_reopen(). This requires
jumping through some hoops to get to the disk device from the partition
device, and to make sure we can still open the partition after the
BLKRRPART call.

Note that this new code path is triggered on dynamic vdev expansion
only; other actions, like creating a new pool, are unchanged and still
call BLKRRPART from userspace.

This change also depends on API changes which are available in 2.6.37
and latter kernels.  The build system has been updated to detect this,
but there is no compatibility mode for older kernels.  This means that
online expansion will NOT be available in older kernels.  However, it
will still be possible to expand the vdev offline.

Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Closes #808
2012-07-17 09:17:31 -07:00
cmd Move partition scanning from userspace to module. 2012-07-17 09:17:31 -07:00
config Move partition scanning from userspace to module. 2012-07-17 09:17:31 -07:00
dracut Move partition scanning from userspace to module. 2012-07-17 09:17:31 -07:00
etc Move partition scanning from userspace to module. 2012-07-17 09:17:31 -07:00
include Move partition scanning from userspace to module. 2012-07-17 09:17:31 -07:00
lib Move partition scanning from userspace to module. 2012-07-17 09:17:31 -07:00
man Move partition scanning from userspace to module. 2012-07-17 09:17:31 -07:00
module Move partition scanning from userspace to module. 2012-07-17 09:17:31 -07:00
patches Add build system 2010-08-31 13:41:27 -07:00
scripts Move partition scanning from userspace to module. 2012-07-17 09:17:31 -07:00
udev Move partition scanning from userspace to module. 2012-07-17 09:17:31 -07:00
.gitignore Ignore unsigned module build products 2010-03-09 14:14:09 -08:00
AUTHORS Add "ashift" property to zpool create 2011-06-17 16:35:49 -07:00
autogen.sh Make autogen.sh executable 2011-07-26 10:15:35 -07:00
ChangeLog Add build system 2010-08-31 13:41:27 -07:00
configure Move partition scanning from userspace to module. 2012-07-17 09:17:31 -07:00
configure.ac Move zfs.release generation to configure step 2012-07-12 12:22:51 -07:00
COPYING Relocate COPYING+COPYRIGHT, remove README cruft 2008-12-01 15:34:53 -08:00
COPYRIGHT Update COPYRIGHT to reference zpios CDDL exceptions. 2010-05-18 14:25:28 -07:00
DISCLAIMER Update COPYRIGHT and DISCLAIMER. 2010-05-18 10:32:23 -07:00
Makefile.am Move zfs.release generation to configure step 2012-07-12 12:22:51 -07:00
Makefile.in Move partition scanning from userspace to module. 2012-07-17 09:17:31 -07:00
META ZFS 0.6.0-rc9 2012-06-14 11:46:40 -07:00
OPENSOLARIS.LICENSE Add CDDL license file 2008-12-01 14:49:34 -08:00
PKGBUILD-zfs-modules.in Add make rule for building Arch Linux packages 2011-12-14 19:14:23 -08:00
PKGBUILD-zfs.in Add make rule for building Arch Linux packages 2011-12-14 19:14:23 -08:00
README.markdown Fix markdown rendering 2010-09-15 09:09:37 -07:00
zfs_config.h.in Move partition scanning from userspace to module. 2012-07-17 09:17:31 -07:00
zfs-modules.spec.in Remove Chaos 4.x RPM support 2012-07-02 15:16:05 -07:00
zfs-script-config.sh.in Unconditionally load core kernel modules 2010-11-11 11:38:25 -08:00
ZFS.RELEASE Update to onnv_147 2010-08-26 14:24:34 -07:00
zfs.release.in Move zfs.release generation to configure step 2012-07-12 12:22:51 -07:00
zfs.spec.in Mark zdev.conf as a config file 2012-06-13 13:02:43 -07:00

README.markdown

Native ZFS for Linux! ZFS is an advanced file system and volume manager which was originally developed for Solaris. It has been successfully ported to FreeBSD and now there is a functional Linux ZFS kernel port too. The port currently includes a fully functional and stable SPA, DMU, and ZVOL with a ZFS Posix Layer (ZPL) on the way!

$ ./configure
$ make pkg

Full documentation for building, configuring, and using ZFS can be found at: http://zfsonlinux.org