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#!/usr/bin/env bash
# file: metadata_h
#
# Copyright (C) 2015 Ubuntu Kylin
#
# Author: Min Chen <minchen@ubuntukylin.com>
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU Library Public License as published by
# the Free Software Foundation; either version 2, or (at your option)
# any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU Library Public License for more details.
#
my_dir=$(dirname "$0")
. $my_dir/common_h
. $my_dir/epoch_h
# put origin name in $image_name_in: for output
# put convert "_" name in $image_name: for grep image hobjects from database
image_name_in=
image_name=
function input_image()
{
local func="input_image"
if [ "$1"x = ""x ];then
echo "$func: no image name input"
exit
fi
image_name_in=$1
# "_" -> "\u"
image_name=`convert_underline $image_name_in`
}
#======================================== distinguish v1 or v2 ===================================
#image_list_v1=$single_node/$cluster-$id/image_list_v1
#image_list_v2=$single_node/$cluster-$id/image_list_v2
function get_image_list()
{
find $osd_data/current/ -type f|grep ".rbd__" >$image_list_v1
find $osd_data/current/ -type f|grep "rbd\\\\uid." >$image_list_v2
}
function get_image_format_by_hobject()
{
local func="get_image_format"
if [ "$1"x = ""x ];then
exit
fi
local res1=`cat $image_list_v1|grep $1`
if [ "$res1"x != ""x ];then
echo 1
exit
fi
local res2=`cat $image_list_v2|grep $1`
if [ "$res2"x = ""x ];then
echo 2
exit
fi
}
#======================================== image format v1 ========================================
# <image_name>.rbd include 3 parts:
# header + snap_count*snapshot + snap_count*snap_name
#
# struct rbd_obj_header_ondisk {
# 40 char text[40];
# 24 char block_name[RBD_MAX_BLOCK_NAME_SIZE];
# 4 char signature[4];
# 8 char version[8];
# struct {
# 1 __u8 order;
# 1 __u8 crypt_type;
# 1 __u8 comp_type;
# 1 __u8 unused;
# } __attribute__((packed)) options;
# 8 ceph_le64 image_size;//hexdump -C s=80 n=8
# 8 ceph_le64 snap_seq; //hexdump -C s=88 n=8
# 4 ceph_le32 snap_count;//hexdump -C s=96 n=4
# 4 ceph_le32 reserved;
# 8 ceph_le64 snap_names_len;//hexdump -C s=104 n=8
# struct rbd_obj_snap_ondisk snaps[0];
# } __attribute__((packed));
#
# sizeof(rbd_obj_header_ondisk): 112
#
# struct rbd_obj_snap_ondisk {
# 8 ceph_le64 id; //hexdump -C s=112+i*16 n=8 , i=[0, snap_count)
# 8 ceph_le64 image_size;//hexdump -C s=112+i*16+8 n=8, i=[0, snap_count)
# } __attribute__((packed));
# sizeof(rbd_obj_snap_ondisk): 16
#
# get snap_names form <image_nane>.rbd
# hexdump -e '10/1 "%_c"' -s $((112 + $snap_count*16)) -n $snap_names_len <image_name>.rbd
# then split snap_names into array
function get_image_metadata_v1()
{
local func="get_image_metadata_v1"
if [ "$1"x = ""x ];then
echo "$func: no image head object input"
exit
fi
local snap_name=
if [ "$2"x != ""x ];then
snap_name=$2
fi
if [ ! -e $1 ];then
echo "$func: $1 not exists"
exit
fi
local hobject_path=$1
d_hobject_path=`dump_backslash $1`
local image_format=`get_image_format_by_hobject $d_hobject_path`
if [ $image_format != 1 ];then
echo "$func: image_format must be 1"
exit
fi
if [ ! -e $hobject_path ];then
echo "$func: $hobject_path not exists"
exit
fi
# decode rbd_obj_header_ondisk of <image_name>.rbd
local block_name=`hexdump -e '10/1 "%c"' -s 40 -n 24 $hobject_path`
local order=`hexdump -e '10/4 "%u"' -s 76 -n 1 $hobject_path`
local image_size=`hexdump -C -s 80 -n 8 $hobject_path|head -n 1|awk '{for (i=9; i>1; i--) {printf $i}}'`
image_size=$((16#$image_size))
local snap_seq=`hexdump -C -s 88 -n 8 $hobject_path|head -n 1|
awk '{num=""; for(i=9; i>1; i--){ num=num""$i;} print strtonum("0x"num);}'`
local snap_count=`hexdump -C -s 96 -n 4 $hobject_path|head -n 1|
awk '{num=""; for(i=5; i>1; i--){ num=num""$i;} print strtonum("0x"num);}'`
local snap_names_len=`hexdump -C -s 104 -n 8 $hobject_path|head -n 1|
awk '{num=""; for(i=9; i>1; i--){ num=num""$i;} print strtonum("0x"num);}'`
echo -e "block_name:\t$block_name"
echo -e "order:\t\t$order"
echo -e "image_size:\t$image_size"
echo -e "snap_seq:\t$snap_seq"
# decode N rbd_obj_snap_ondisk of <image_name>.rbd
declare -a snap_ids
declare -a snap_names
declare -a snap_image_sizes
local size_header=112 #sizeof(rbd_obj_header_ondisk)
local size_snap=16 #sizeof(rbd_obj_snap_ondisk)
local offset=0
local id_off=0
local size_off=0
for ((i=0; i<$snap_count; i++))
do
offset=$(($size_header + $i * $size_snap))
id_off=$offset
size_off=$(($offset + 8))
snap_ids[$i]=`hexdump -C -s $id_off -n 8 $hobject_path|head -n 1|
awk '{num=""; for(i=9; i>1; i--){num=num""$i;} print strtonum("0x"num);}'`
snap_image_sizes[$i]=`hexdump -C -s $size_off -n 8 $hobject_path|head -n 1|
awk '{num=""; for(i=9; i>1; i--){num=num""$i;} print strtonum("0x"num);}'`
done
offset=$(($size_header + $snap_count * $size_snap))
snap_names=(`hexdump -e '10/1 "%_c"' -s $offset -n $snap_names_len $hobject_path|
awk -F "\\\\\\\\\\\\\\\\0" '{for(i=1; i<=NF; i++) {print $i" "} }'`);
echo -e "\t\tID\tNAME\t\tSIZE"
for ((i=0; i<$snap_count; i++))
do
if [ "$snap_name"x = ""x ];then
echo -n -e "snapshot:\t"
echo -e "${snap_ids[$i]}\t${snap_names[$i]}\t\t${snap_image_sizes[$i]}"
continue
fi
if [ "$snap_name"x = "${snap_names[$i]}"x ];then
echo -n -e "snapshot:\t"
echo -e "${snap_ids[$i]}\t${snap_names[$i]}\t\t${snap_image_sizes[$i]}"
return
fi
done
}
#======================================== end image format v1 ========================================
#======================================== image format v2 ========================================
# map_header, header_seq, header, key/value
# eg.
# map_header _HOBJTOSEQ_:rbd%uheader%e139a6b8b4567...head.2.68E826B6
# meta_header_seq 17426
# header: _USER_0000000000017426_USER_:object_prefix
# _USER_0000000000017426_USER_:order
# _USER_0000000000017426_USER_:size
# _USER_0000000000017426_USER_:snap_seq
# key/value ceph-kvstore-tool /storepath get _USER_0000000000017426_USER_ (object_prefix|order|size|snap_seq)
# decode image id from image_id_hobject
function get_image_id()
{
local func="get_image_id"
if [ "$1"x = ""x ];then
exit;
fi
local image_id_hobject=$1 #from admin node's database
if [ ! -e $image_id_hobject ];then
#echo "$func: $image_id_hobject not exists"
exit;
fi
# get len of string
local n=`hexdump -e '10/4 "%u"' -s 0 -n 4 $image_id_hobject`
# get string
hexdump -e '10/1 "%c"' -s 4 -n $n $image_id_hobject
}
#find image_id omap entry in omaplist
map_header_prefix=
map_header_key=
function get_map_header()
{
local func="get_map_header"
local image_id=$1
if [ "$image_id"x = ""x ];then
echo "$func: no image_id input"
exit;
fi
map_header_prefix=`get_map_header_prefix`
local keyword="header%e"$image_id
map_header_key=`get_map_header_key $keyword`
if [ "$map_header_key"x = ""x ];then
echo "$func: map_header_key is NULL(not in omaplist)"
exit
fi
}
#get meta header seq from map_header
meta_header_seq=
function get_meta_header_seq()
{
local func="get_meta_header_seq"
if [ "$1"x == ""x ];then
echo "$func: no prefix input"
exit;
elif [ "$2"x == ""x ];then
echo "$func: no key input"
exit;
fi
local prefix=$1;
local key=$2;
meta_header_seq=`get_header_seq $prefix $key`
}
# get image metadata : object_prefix, order, image_size, snap_seq
object_prefix=
order=
image_size=
snap_seq=
function get_image_metadata_v2()
{
local func="get_image_metadata_v2"
if [ "$1"x = ""x ];then
echo "$func: no meta_header_seq input"
exit;
fi
local meta_header_seq=`printf "%016d" $1`
#echo "$func: meta_header_seq = "$meta_header_seq
local ghobject_key="_USER_"$meta_header_seq"_USER_"
local prefix=$ghobject_key
object_prefix=`get_header_kv $prefix object_prefix string`
#object_prefix="rbd_data.$image_id"
order=`get_header_kv $prefix order int`
image_size=`get_header_kv $prefix size int`
snap_seq=`get_header_kv $prefix snap_seq int`
echo -e "object_prefix:\t$object_prefix"
echo -e "order:\t\t$order"
echo -e "image_size:\t$image_size"
echo -e "snap_seq:\t$snap_seq"
# list snapshot
list_snaps_v2 $1 $2
}
# struct cls_rbd_snap {
# snapid_t id;
# string name;
# uint64_t image_size;
# uint64_t features;
# uint8_t protection_status;
# cls_rbd_parent parent;
# }
# decode cls_rbd_snap
# 1 u8 struct_v
# 1 u8 struct_compat
# 4 u32 struct_len
# 8 u64 snapid_t id //s=6 n=8
# 4 u32 len of name //s=14 n=4
# len char name //s=18 n=len
# 8 u64 image_size
# 8 u64 features
# ......
#
function list_snaps_v2()
{
local func="list_snaps_v2"
if [ "$1"x = ""x ];then
exit
fi
local sname=
if [ $# -eq 2 ];then
sname=$2
fi
local meta_header_seq=`printf "%016d" $1`
local prefix="_USER_"$meta_header_seq"_USER_"
local keys=(`awk -F ":" '/snapshot_/ && $1 == "'"$prefix"'" {if ($2 == "") exit; split($2, arr, "_");
print arr[2];}' $omap_list|sort -r`)
echo -e "\t\tID\tNAME\t\tSIZE"
for key in ${keys[@]}
do
key="snapshot_$key"
local arr=(`ceph-kvstore-tool $omap_path get $prefix $key|awk -F ":" '{print $2}'`);
# get snap_name
tmp=
for ((i=17; i>13; i--))
do
tmp="$tmp${arr[$i]}"
done
local len=$((16#$tmp))
local snap_name=
for ((i=18; i<$((18+$len)); i++))
do
# convert ascii to char
local char=`echo -e "\x${arr[$i]}"`
snap_name="$snap_name$char"
done
# get snap_id (little endian)
local tmp=
for ((i=13; i>5; i--))
do
tmp="$tmp${arr[$i]}"
done
local snap_id=$((16#$tmp))
# get image_size of current snap (little endian)
tmp=
for ((i=$((25+$len)); i>$((17+$len)); i--))
do
tmp="$tmp${arr[$i]}"
done
local image_size=$((16#$tmp))
if [ "$sname"x = ""x ];then
echo -e "snapshot:\t$snap_id\t$snap_name\t\t$image_size"
continue
fi
if [ "$sname"x = "$snap_name"x ];then
echo -e "snapshot:\t$snap_id\t$snap_name\t\t$image_size"
return
fi
done
}
#======================================== end image format v2 ========================================
|