cachestats.sh improve wildcard handling
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@ -3,25 +3,30 @@
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# cachestats for dm-cache
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#
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# SPDX-License-Identifier: GPL-3.0-or-later
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# Copyright 2023 Forza <forza@tnonline.net>
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# Copyright 2023-2024 Forza <forza@tnonline.net>
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# cacheatats usage
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# Help text
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usage() {
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echo "Usage: $(basename "${0}") [DEVICE_NAME or PATH] [DEVICE_NAME or PATH] ..."
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echo "Usage: $(basename "$0") [-v|--verbose] [DEVICE_NAME or PATH] [DEVICE_NAME or PATH] ..."
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echo "Options:"
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echo " -h, --help Display this help message"
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echo " -v, --verbose Display detailed information"
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}
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# Check for help option or no arguments
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if [ "$#" -eq 0 ]; then
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usage
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exit 1
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fi
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if [ "${1:0:1}" == "-" ]; then
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if [[ "${1:0:1}" == "-" ]]; then
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case "$1" in
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-h|--help)
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usage
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exit 1
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exit 0
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;;
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-v|--verbose)
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VERBOSE=1
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shift
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;;
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*)
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echo "Invalid option: $1"
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@ -31,13 +36,15 @@ if [ "${1:0:1}" == "-" ]; then
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esac
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fi
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# Declare used variables
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declare -A data # associative array
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declare -a dmstatus # indexed array
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declare -i sizess # integer variable
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# Declare variables
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declare -A data
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declare -a dmstatus
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declare -a expanded_devices
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declare -i sizess
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declare status_output
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declare device_name_or_path
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declare device_name
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declare separator_needed
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# Function to convert bytes to IEC units
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to_iec() {
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@ -72,7 +79,7 @@ debug_output(){
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# <#core args> <core args>* <policy name> <#policy args> <policy args>*
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# <cache metadata mode>
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# Loop through throuh all fields to list and print their values
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# Loop through through all fields to list and print their values
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if (( DEBUG > 0 )) ; then
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printf "\nDEBUG INFO\n"
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printf "========\n"
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@ -95,8 +102,29 @@ debug_output(){
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fi
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}
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# Expand wildcard patterns for devices
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for arg in "$@"; do
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if [[ "$arg" == /* ]]; then
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# Full path provided, use as-is
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expanded_devices+=("$arg")
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else
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# Assume partial name; expand in /dev/mapper
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# shellcheck disable=SC2231
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for device in /dev/mapper/${arg}*; do
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if [[ -e $device ]]; then
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expanded_devices+=("$device")
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else
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echo "No matching devices for pattern: $arg" >&2
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fi
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done
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fi
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done
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# Add separator if there is more than one device
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separator_needed=$(( ${#expanded_devices[@]} > 1 ))
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# Loop through all devices and print their info
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for device_name_or_path in "${@}"; do
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for device_name_or_path in "${expanded_devices[@]}"; do
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# Strip path part from device name
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device_name=$(basename "${device_name_or_path}")
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@ -148,23 +176,30 @@ for device_name_or_path in "${@}"; do
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data["status"]="${dmstatus[24]//-/OK}"
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fi
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# Print dm-cache data
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if (( separator_needed )); then
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printf "\n\n********************** DEVICE %s **********************\n" "${data[name]}"
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fi
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# Print debug information
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debug_output
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# Print dm-cache data
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printf "\nDEVICE\n"
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printf "========\n"
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printf "\nDEVICE\n========\n"
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printf "%-*s%s\n" "26" "Device-mapper name: " "/dev/mapper/${data[name]}"
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printf "%-*s%s\n" "26" "Origin size: " "$(to_iec $(( data[origin_length] - data[origin_start] )) )"
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if [[ $VERBOSE -eq 1 ]]; then
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printf "%-*s%s\n" "26" "Discards: " "${data[discard_passdown]}"
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fi
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printf "\n"
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printf "CACHE\n"
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printf "========\n"
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printf "CACHE\n========\n"
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printf "%-*s%s\n" "26" "Size / Usage: " "$(to_iec $(( data[total_cache_blocks] * data[cache_block_size] ))) / $(to_iec $(( data[used_cache_blocks] * data[cache_block_size] ))) ($(( 100 * data[used_cache_blocks] / data[total_cache_blocks] )) %)"
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printf "%-*s%s\n" "26" "Read Hit Rate: " "${data[read_hits]} / $(( data[read_misses] + data[read_hits] )) ($(( 100 * data[read_hits] / (data[read_hits] + data[read_misses] ) )) %)"
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printf "%-*s%s\n" "26" "Write Hit Rate: " "${data[write_hits]} / $(( data[write_misses] + data[write_hits] )) ($(( 100 * data[write_hits] / ( data[write_hits] + data[write_misses] ) )) %)"
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printf "%-*s%s\n" "26" "Dirty: " "$(to_iec "${data[dirty_cache]}")"
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if [[ $VERBOSE -eq 1 ]]; then
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printf "%-*s%s\n" "26" "Block Size: " "$(to_iec "${data[cache_block_size]}")"
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printf "%-*s%s\n" "26" "Promotions / Demotions: " "${data[promotions]} / ${data[demotions]}"
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printf "%-*s%s\n" "26" "Migration Threshold: " "$(to_iec "${data[migration_threshold]}")"
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@ -177,7 +212,8 @@ for device_name_or_path in "${@}"; do
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printf "METADATA\n"
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printf "========\n"
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printf "%-*s%s\n" "26" "Size / Usage: " "$(to_iec $(( data[total_metadata_blocks] * data[metadata_block_size] ))) / $(to_iec $(( data[used_metadata_blocks] * data[metadata_block_size] ))) ($(( 100 * data[used_metadata_blocks] / data[total_metadata_blocks] )) %)"
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fi
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else
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echo "Device not found or no valid status output."
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echo "Device ${device_name_or_path} not found or no valid status output."
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fi
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done
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