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      1 #!/usr/bin/perl
      2 #
      3 # CDDL HEADER START
      4 #
      5 # The contents of this file are subject to the terms of the
      6 # Common Development and Distribution License (the "License").
      7 # You may not use this file except in compliance with the License.
      8 #
      9 # You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
     10 # or http://www.opensolaris.org/os/licensing.
     11 # See the License for the specific language governing permissions
     12 # and limitations under the License.
     13 #
     14 # When distributing Covered Code, include this CDDL HEADER in each
     15 # file and include the License file at usr/src/OPENSOLARIS.LICENSE.
     16 # If applicable, add the following below this CDDL HEADER, with the
     17 # fields enclosed by brackets "[]" replaced with your own identifying
     18 # information: Portions Copyright [yyyy] [name of copyright owner]
     19 #
     20 # CDDL HEADER END
     21 #
     22 #
     23 # Copyright 2007 Sun Microsystems, Inc.  All rights reserved.
     24 # Use is subject to license terms.
     25 #
     26 # ident	"%Z%%M%	%I%	%E% SMI"
     27 
     28 #
     29 # Put commands in  here to flush the file system cache after
     30 # file set creation but prior to steady state
     31 #
     32 # For most file systems, filebench already handles fs cache flushing
     33 # For ZFS, it needs some help, so this script does
     34 #    "zpool export <poolname>" then "zpool import <poolname>"
     35 #
     36 
     37 $fs = $ARGV[0];
     38 $dir = $ARGV[1];
     39 
     40 #
     41 # if not zfs, inform user and exit.
     42 #
     43 if (($fs =~ m/^zfs$/) != 1) {
     44         print "filesystem type is: $fs, no action required, so exiting\n";
     45         exit(0);
     46 }
     47 
     48 #
     49 # It is zfs. Find name of pool to export/import from supplied
     50 # directory path name $dir
     51 #
     52 # Example:
     53 # # zfs list -H
     54 # tank    164K    24.0G   19K     /tank
     55 # tank/a  18K     24.0G   18K     /tank/a
     56 # tank/b  18K     24.0G   18K     /wombat
     57 # # 
     58 # # ./fs_flush zfs /wombat
     59 # 'zpool export tank'
     60 # 'zpool import tank'
     61 # # 
     62 #
     63 
     64 # Get a list of zfs file systems mounted locally
     65 @zlist = `/usr/sbin/zfs list -H`;
     66 
     67 #
     68 # Compare the list with the supplied directory path name
     69 #
     70 chomp @zlist;
     71 foreach ( @zlist ) {
     72 	#
     73 	# For listed zfs file systems, extract the root and
     74 	# mount point information
     75 	#
     76         my $zline = $_;
     77         ($root, $b, $c, $d, $mntpnt) = split /\t/, $zline, 5;
     78 
     79 	# See if the supplied directory path includes this mount point
     80         if ($dir =~/^$mntpnt/) {
     81 
     82 		#
     83 		# We have a winner! The root name up to the
     84 		# first forward slash is the pool name
     85 		#
     86                 ($pool) = split /\//, $root;
     87 
     88 		# Do the cache flushing
     89                 print "'zpool export $pool'\n";
     90                 system("zpool export $pool");
     91                 print "'zpool import $pool'\n";
     92                 system("zpool import $pool");
     93                 exit(0);
     94         }
     95 }
     96