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OpenZFS on Linux and FreeBSD
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Suman Chakravartula e18be9a637 Add overlay(-O) mount option support 
Linux supports mounting over non-empty directories by default.
In Solaris this is not the case and -O option is required for
zfs mount to mount a zfs filesystem over a non-empty directory.

For compatibility, I've added support for -O option to mount
zfs filesystems over non-empty directories if the user wants
to, just like in Solaris.

I've defined MS_OVERLAY to record it in the flags variable if
the -O option is supplied.  The flags variable passes through
a few functions and its checked before performing the empty
directory check in zfs_mount function.  If -O is given, the
check is not performed.

Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Closes #473
 		2012-01-12 15:49:38 -08:00
cmd Add overlay(-O) mount option support 2012-01-12 15:49:38 -08:00
config Linux 3.2 compat, security_inode_init_security() 2012-01-12 15:06:39 -08:00
dracut Linux 3.1 compat, super_block->s_shrink 2012-01-11 11:46:02 -08:00
etc Linux 3.1 compat, super_block->s_shrink 2012-01-11 11:46:02 -08:00
include Linux 3.1 compat, super_block->s_shrink 2012-01-11 11:46:02 -08:00
lib Add overlay(-O) mount option support 2012-01-12 15:49:38 -08:00
man Linux 3.1 compat, super_block->s_shrink 2012-01-11 11:46:02 -08:00
module Apply the ZoL coding standard to zpl_xattr.c 2012-01-12 15:12:03 -08:00
patches Add build system 2010-08-31 13:41:27 -07:00
scripts Linux 3.1 compat, super_block->s_shrink 2012-01-11 11:46:02 -08:00
udev Linux 3.1 compat, super_block->s_shrink 2012-01-11 11:46:02 -08:00
.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
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
ChangeLog Add build system 2010-08-31 13:41:27 -07:00
DISCLAIMER Update COPYRIGHT and DISCLAIMER. 2010-05-18 10:32:23 -07:00
META Prep zfs-0.6.0-rc6 tag 2011-10-06 14:10:45 -07:00
Makefile.am Add make rule for building Arch Linux packages 2011-12-14 19:14:23 -08:00
Makefile.in Linux 3.1 compat, super_block->s_shrink 2012-01-11 11:46:02 -08:00
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.RELEASE Update to onnv_147 2010-08-26 14:24:34 -07:00
autogen.sh Make autogen.sh executable 2011-07-26 10:15:35 -07:00
configure Linux 3.2 compat, security_inode_init_security() 2012-01-12 15:06:39 -08:00
configure.ac Add make rule for building Arch Linux packages 2011-12-14 19:14:23 -08:00
zfs-modules.spec.in Fix depmod warning 2011-11-10 10:26:06 -08:00
zfs-script-config.sh.in Unconditionally load core kernel modules 2010-11-11 11:38:25 -08:00
zfs.spec.in Include distribution in release 2011-10-19 11:43:27 -07:00
zfs_config.h.in Linux 3.2 compat, security_inode_init_security() 2012-01-12 15:06:39 -08:00

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