common.punch

   1 ##/bin/bash
   2 #
   3 # Copyright (c) 2007 Silicon Graphics, Inc.  All Rights Reserved.
   4 #
   5 # This program is free software; you can redistribute it and/or
   6 # modify it under the terms of the GNU General Public License as
   7 # published by the Free Software Foundation.
   8 #
   9 # This program is distributed in the hope that it would be useful,
  10 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12 # GNU General Public License for more details.
  13 #
  14 # You should have received a copy of the GNU General Public License
  15 # along with this program; if not, write the Free Software Foundation,
  16 # Inc.,  51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
  17 #
  18 #
  19 # common functions for excersizing hole punches with extent size hints etc.
  20
  21 # source dmap_scratch_mount etc.
  22 . ./common.dmapi
  23
  24 _spawn_test_file() {
  25         echo "# spawning test file with $*"
  26         local blksize=$1
  27         local file_size=`expr $2 \* $blksize`
  28         local extent_size_hint=`expr $3 \* $blksize`
  29         local test_file=$4
  30         local reserve_space=$5
  31
  32         if [ $extent_size_hint -ne 0 ]; then
  33                 echo "+ setting extent size hint to $extent_size_hint"
  34                 $XFS_IO_PROG -f \
  35                 -c "extsize $extent_size_hint" \
  36                 $test_file
  37         fi
  38         # print extent size hint for $test_file
  39         $XFS_IO_PROG -f \
  40         -c "extsize" \
  41         $test_file
  42
  43         if [ "$reserve_space" == "noresv" ]; then
  44                 echo "+ not using resvsp at file creation"
  45                 $XFS_IO_PROG -f \
  46                 -c "truncate $file_size" \
  47                 $test_file
  48         else
  49                 $XFS_IO_PROG -f \
  50                 -c "truncate $file_size" \
  51                 -c "resvsp 0 $file_size" \
  52                 $test_file
  53         fi
  54 }
  55
  56 _do_punch() {
  57         echo "# punching with $*"
  58         # punch or bite the ear off $test_file to create a hole
  59         local blksize=$1
  60         local punch_offset=`expr $2 \* $blksize`
  61         local punch_size=`expr $3 \* $blksize`
  62         local punch_type=$4             # u for unresvsp, d for dm_punch
  63         local test_file=$5
  64
  65         if [ "$punch_type" == "u" ]; then
  66                 echo "+ hole punch using unresvsp"
  67                 $XFS_IO_PROG -f \
  68                 -c "unresvsp $punch_offset $punch_size" \
  69                 $test_file
  70         fi
  71         if [ "$punch_type" == "d" ]; then
  72                 echo "+ hole punch using dmapi punch_hole"
  73                 ${DMAPI_QASUITE1_DIR}cmd/punch_hole -o $punch_offset -l $punch_size \
  74                         ${SCRATCH_MNT}/$test_file
  75         fi
  76 }
  77
  78 _do_write() {
  79         echo "# writing with $*"
  80         local blksize=$1
  81         local write_offset=`expr $2 \* $blksize`
  82         local write_size=`expr $3 \* $blksize`
  83         local test_file=$4
  84
  85         $XFS_IO_PROG -f \
  86         -c "pwrite $write_offset $write_size" \
  87         $test_file >/dev/null
  88 }
  89
  90 _do_bmap() {
  91         echo "# showing file state $*"
  92         local test_file=$1
  93
  94         $XFS_IO_PROG -f \
  95         -c "bmap -vvp" \
  96         $test_file
  97 }
  98
  99 _test_punch() {
 100         echo "# testing $* ..."
 101         local blksize=$1
 102         # all points and sizes below are in terms of filesystem blocks
 103         local extsize_hint_blks=$2              # extent size hint in FS blocks, 0=do not set
 104         local file_size_blks=$3                 # the file size in blocks
 105         local punch_points_blks=( $4 )  # array of places to punch holes in the file
 106         local punch_sizes_blks=( $5 )   # array of size of each punch in blocks
 107         local punch_types=( $6  )               # array of u=unresvsp or d=dm_punch
 108         local write_points_blks=( $7 )  # array of places to pwrite in the file
 109         local write_sizes_blks=( $8 )   # array of size of each write
 110
 111         local punch_write_order=( $9 )  # array of punch/write operation order
 112                                                                         # e.g. "w p w w p" means: do 1st write...
 113                                                                         # then 1st punch, 2nd & 3rd write, 2nd punch
 114         local resvsp=${10}                              # if "noresv" then don't resvsp on file create
 115         local filename=punch_test_file
 116
 117         cd /
 118         umount $SCRATCH_MNT >/dev/null 2>&1
 119
 120         _scratch_mkfs_xfs -bsize=$blksize >/dev/null 2>&1 \
 121                 || _fail "mkfs failed"
 122
 123         local this_punch_type=""
 124         local dmap_punch_used=0
 125         for this_punch_type in "${punch_types[@]}"; do
 126                 [ "$this_punch_type" == "d" ] && dmap_punch_used=1
 127         done
 128         if [ $dmap_punch_used -ne 0 ]; then
 129                 # a punch type of dm_punch has been specified, do a dmapi mount
 130                 echo "+ mounting with dmapi enabled"
 131                 _dmapi_scratch_mount
 132         else
 133                 # only unresvsp punch type is used, just do a normal mount
 134                 _scratch_mount || _fail "mount failed"
 135         fi
 136
 137         cd $SCRATCH_MNT
 138
 139         # check a size is specified for each punch
 140         [ ${#punch_points_blks[*]} -eq ${#punch_sizes_blks[*]} ] \
 141                 || _fail "num punch points given does not equal num punch sizes"
 142
 143         # check a type is specified for each punch
 144         [ ${#punch_points_blks[*]} -eq ${#punch_types[*]} ] \
 145                 || _fail "num punch points given does not equal num punch types"
 146
 147         # check a size is specified for each write
 148         [ ${#write_points_blks[*]} -eq ${#write_sizes_blks[*]} ] \
 149                 || _fail "num write points given does not equal num write sizes"
 150
 151         # check punch_write_order operations match number of punches + writes
 152         local total_pw_operations=`expr ${#punch_points_blks[*]} + ${#write_points_blks[*]}`
 153         [ $total_pw_operations -eq ${#punch_write_order[*]} ] \
 154                 || _fail "punch_write_order ops doesn't match number of punches + writes"
 155
 156         # create the file and setup extent size hint
 157         _spawn_test_file $blksize $file_size_blks $extsize_hint_blks $filename $resvsp
 158
 159         # do the writes and punches
 160         local operation=""
 161         local punch_index=0
 162         local write_index=0
 163         for operation in "${punch_write_order[@]}"; do
 164                 if [ "$operation" == "p" ]; then
 165                         _do_punch $blksize ${punch_points_blks[$punch_index]} \
 166                                 ${punch_sizes_blks[$punch_index]} ${punch_types[$punch_index]} \
 167                                 $filename
 168                         punch_index=`expr $punch_index + 1`
 169                 fi
 170                 if [ "$operation" == "w" ]; then
 171                         _do_write $blksize ${write_points_blks[$write_index]} \
 172                                 ${write_sizes_blks[$write_index]} $filename
 173                         write_index=`expr $write_index + 1`
 174                 fi
 175                 sync
 176                 _do_bmap $filename              # print out the state of the file
 177         done
 178 }