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Jan Sanislo 79065ed5a4 Return -ESTALE to force lookup for missing NFS file handles 
There seems to be a annoying problem using NFSv4 to access ZFS
file systems under certain circumstances.  It's easily reproduced:

    nfs_client1:  mount server:/export /mnt
    nfs_client1:  cd /mnt
    nfs_client1:  echo foo >junk
    nfs_client1:  cat junk
    foo

Now on a different NFSv4 client:

    nfs_client2:  mount server:/export /mnt
    nfs_client2:  cd /mnt
    nfs_client2:  vi junk
    # Make some changes to /mnt/junk and save
    # This change the inode associated with /mnt/junk

Now back to the original client:

    nfs_client1:  cat junk
    cat: junk: No such file or directory

Admittedly NFSv4 is not advertised as a cluster file system that
maintains a completely coherent view of data across multiple nodes.
But it does have some mechanisms built in that try to deal with
situations like the above.  Namely, it employs specialized file
handle lookup routines that return ESTALE when a file handle contains
a non-existant inode value.  The ESTALE return triggers a return
full file path lookup from the client to determine if the file has
actually gone away or if the cached file handle is no longer valid.
ZFS behavior can be brought into line with other file systems
(e.g., ext4) by applying the following patch:

Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Closes #3224
2015-05-14 11:16:52 -07:00
cmd Illumos 5810 - zdb should print details of bpobj 2015-05-11 15:10:24 -07:00
config Linux 2.6.36 compat, use REQ_FAILFAST_MASK and remove pre-2.6.36 support 2015-05-11 15:07:00 -07:00
contrib Add bash completions by Aneurin Price. 2014-08-06 15:03:28 -07:00
dracut Execute udevadm settle before trying to import pools 2015-03-24 13:38:55 -07:00
etc Rebuild init scripts on source file updates 2015-04-14 13:26:49 -07:00
include Illumos 5765 - add support for estimating send stream size with lzc_send_space when source is a bookmark 2015-05-13 09:03:59 -07:00
lib Illumos 5765 - add support for estimating send stream size with lzc_send_space when source is a bookmark 2015-05-13 09:03:59 -07:00
man Update ZED copyright boilerplate 2015-05-11 15:07:00 -07:00
module Return -ESTALE to force lookup for missing NFS file handles 2015-05-14 11:16:52 -07:00
rpm Tag zfs-0.6.4 2015-04-08 20:16:45 -07:00
scripts Set zfs_autoimport_disable default value to 1 2015-02-17 16:09:41 -08:00
udev Open pools asynchronously after module load 2013-07-03 09:24:38 -07:00
.gitignore Ignore *.{deb,rpm,tar.gz} files in the top directory. 2013-04-24 16:18:59 -07:00
.gitmodules Add zimport.sh compatibility test script 2014-02-21 12:10:31 -08:00
AUTHORS Add a missing > to AUTHORS 2014-09-02 14:18:53 -07:00
autogen.sh build: do not call boilerplate ourself 2013-04-02 10:55:20 -07:00
configure.ac Add RHEL style kmod packages 2015-03-27 14:41:48 -07:00
copy-builtin Consistent menuconfig name 2012-08-26 13:49:37 -07:00
COPYRIGHT Update ZED copyright boilerplate 2015-05-11 15:07:00 -07:00
DISCLAIMER Fix minor typos and update marketing copy. 2013-03-21 12:51:06 -07:00
Makefile.am Kernel header installation should respect --prefix 2014-10-28 09:37:06 -07:00
META Tag zfs-0.6.4 2015-04-08 20:16:45 -07:00
OPENSOLARIS.LICENSE Add CDDL license file 2008-12-01 14:49:34 -08:00
README.markdown Fix minor typos and update marketing copy. 2013-03-21 12:51:06 -07:00
zfs-script-config.sh.in Initial implementation of zed (ZFS Event Daemon) 2014-04-02 13:10:03 -07:00
zfs.release.in Move zfs.release generation to configure step 2012-07-12 12:22:51 -07:00

README.markdown

Native ZFS for Linux!

ZFS is an advanced file system and volume manager which was originally developed for Solaris and is now maintained by the Illumos community.

ZFS on Linux, which is also known as ZoL, is currently feature complete. It includes fully functional and stable SPA, DMU, ZVOL, and ZPL layers.

Full documentation for installing ZoL on your favorite Linux distribution can be found at: http://zfsonlinux.org