common/filter.btrfs

   1 # Filters for btrfs command output
   2
   3 . ./common/filter
   4
   5 # Some, but not all, commands emit "Btrfs <version>"
   6 _filter_btrfs_version()
   7 {
   8         sed -e "s/^[Bb]trfs.*//g"
   9 }
  10
  11 _filter_devid()
  12 {
  13         sed -e "s/\(devid\)\s\+[0-9]\+/\1 <DEVID>/g"
  14 }
  15
  16 # If passed a number as first arg, filter that number of devices
  17 # If passed a UUID as second arg, filter that exact UUID
  18 _filter_btrfs_filesystem_show()
  19 {
  20         if [ ! -z $1 ]; then
  21                 NUMDEVS=$1
  22                 NUM_SUBST="<EXACTNUM>"
  23         else
  24                 NUMDEVS="[0-9]\+"
  25                 NUM_SUBST="<NUM>"
  26         fi
  27
  28         UUID=""
  29         if [ ! -z $2 ]; then
  30                 UUID=$2
  31         fi
  32
  33         # the uniq collapses all device lines into 1
  34         _filter_uuid $UUID | _filter_scratch | _filter_scratch_pool | \
  35         _filter_size | _filter_btrfs_version | _filter_devid | \
  36         _filter_zero_size | \
  37         sed -e "s/\(Total devices\) $NUMDEVS/\1 $NUM_SUBST/g" | \
  38         uniq
  39 }
  40
  41 # This eliminates all numbers, and shows only unique lines,
  42 # to accomodate a varying nr. of devices.
  43 # If given an argument, make sure we saw that many devices
  44 # in total.
  45 _filter_btrfs_device_stats()
  46 {
  47         if [ ! -z $1 ]; then
  48                 NUMDEVS=$1
  49                 UNIQ_OPT="-c"
  50         else
  51                 NUMDEVS="thiswillnotmatch"
  52                 UNIQ_OPT=""
  53         fi
  54
  55         _filter_scratch | _filter_scratch_pool | \
  56         sed -e "s/[0-9]\+$/<NUM>/g" | sort | uniq $UNIQ_OPT | \
  57         sed -e "s/ *$NUMDEVS /<NUMDEVS> /g"
  58 }
  59
  60 _filter_transaction_commit() {
  61         sed -e "/Transaction commit: none (default)/d" | \
  62         sed -e "s/Delete subvolume (.*commit):/Delete subvolume/g"
  63 }
  64
  65 _filter_btrfs_subvol_delete()
  66 {
  67         _filter_scratch | _filter_transaction_commit
  68 }
  69
  70 _filter_btrfs_compress_property()
  71 {
  72         sed -e "s/compression=\(lzo\|zlib\)/COMPRESSION=XXX/g"
  73 }
  74
  75 # filter error messages from btrfs prop, optionally verify against $1
  76 # recognized message(s):
  77 #  "object is not compatible with property: label"
  78 #  "invalid value for property:{, value}"
  79 #  "failed to {get,set} compression for $PATH[.:]: Invalid argument"
  80 _filter_btrfs_prop_error()
  81 {
  82         if ! [ -z "$1" ]; then
  83                 sed -e "s#\(compatible with property\): $1#\1#" \
  84                     -e "s#^\(.*failed to [sg]et compression for $1\)[:.] \(.*\)#\1: \2#"
  85         else
  86                 sed -e "s#^\(.*compatible with property\).*#\1#" \
  87                     -e "s#^\(.*invalid value for property\)[:.].*#\1#"
  88         fi
  89 }
  90
  91 # make sure this script returns success
  92 /bin/true