--- /dev/null
+#!/bin/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 inlude 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 __le64 image_size;//hexdump -C s=80 n=8
+# 8 __le64 snap_seq; //hexdump -C s=88 n=8
+# 4 __le32 snap_count;//hexdump -C s=96 n=4
+# 4 __le32 reserved;
+# 8 __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 __le64 id; //hexdump -C s=112+i*16 n=8 , i=[0, snap_count)
+# 8 __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 ========================================
Code Review / stor4nfv.git / blobdiff