kdumpctl: Move get_kernel_size to kdumpctl
The function is only used in do_estimate. Move it to kdumpctl to prevent confusion. Signed-off-by: Philipp Rudo <prudo@redhat.com> Reviewed-by: Pingfan Liu <piliu@redhat.com> Reviewed-by: Coiby Xu <coxu@redhat.com>
This commit is contained in:
Philipp Rudo
Coiby Xu
parent
0ff44ca6e8
commit
81d89c885f
72
kdump-lib.sh
72
kdump-lib.sh
@ -853,75 +853,3 @@ get_all_kdump_crypt_dev()
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get_luks_crypt_dev "$(kdump_get_maj_min "$_dev")"
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done
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}
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check_vmlinux()
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{
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# Use readelf to check if it's a valid ELF
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readelf -h "$1" &> /dev/null || return 1
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}
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get_vmlinux_size()
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{
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local size=0 _msize
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while read -r _msize; do
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size=$((size + _msize))
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done <<< "$(readelf -l -W "$1" | awk '/^ LOAD/{print $6}' 2> /dev/stderr)"
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echo $size
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}
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try_decompress()
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{
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# The obscure use of the "tr" filter is to work around older versions of
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# "grep" that report the byte offset of the line instead of the pattern.
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# Try to find the header ($1) and decompress from here
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for pos in $(tr "$1\n$2" "\n$2=" < "$4" | grep -abo "^$2"); do
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if ! type -P "$3" > /dev/null; then
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ddebug "Signiature detected but '$3' is missing, skip this decompressor"
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break
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fi
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pos=${pos%%:*}
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tail "-c+$pos" "$img" | $3 > "$5" 2> /dev/null
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if check_vmlinux "$5"; then
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ddebug "Kernel is extracted with '$3'"
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return 0
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fi
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done
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return 1
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}
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# Borrowed from linux/scripts/extract-vmlinux
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get_kernel_size()
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{
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# Prepare temp files:
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local tmp img=$1
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tmp=$(mktemp /tmp/vmlinux-XXX)
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trap 'rm -f "$tmp"' 0
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# Try to check if it's a vmlinux already
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check_vmlinux "$img" && get_vmlinux_size "$img" && return 0
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# That didn't work, so retry after decompression.
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try_decompress '\037\213\010' xy gunzip "$img" "$tmp" ||
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try_decompress '\3757zXZ\000' abcde unxz "$img" "$tmp" ||
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try_decompress 'BZh' xy bunzip2 "$img" "$tmp" ||
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try_decompress '\135\0\0\0' xxx unlzma "$img" "$tmp" ||
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try_decompress '\211\114\132' xy 'lzop -d' "$img" "$tmp" ||
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try_decompress '\002!L\030' xxx 'lz4 -d' "$img" "$tmp" ||
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try_decompress '(\265/\375' xxx unzstd "$img" "$tmp"
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# Finally check for uncompressed images or objects:
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[[ $? -eq 0 ]] && get_vmlinux_size "$tmp" && return 0
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# Fallback to use iomem
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local _size=0 _seg
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while read -r _seg; do
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_size=$((_size + 0x${_seg#*-} - 0x${_seg%-*}))
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done <<< "$(grep -E "Kernel (code|rodata|data|bss)" /proc/iomem | cut -d ":" -f 1)"
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echo $_size
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}
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72
kdumpctl
72
kdumpctl
@ -1147,6 +1147,78 @@ rebuild()
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rebuild_initrd
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}
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check_vmlinux()
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{
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# Use readelf to check if it's a valid ELF
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readelf -h "$1" &> /dev/null || return 1
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}
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get_vmlinux_size()
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{
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local size=0 _msize
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while read -r _msize; do
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size=$((size + _msize))
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done <<< "$(readelf -l -W "$1" | awk '/^ LOAD/{print $6}' 2> /dev/stderr)"
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echo $size
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}
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try_decompress()
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{
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# The obscure use of the "tr" filter is to work around older versions of
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# "grep" that report the byte offset of the line instead of the pattern.
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# Try to find the header ($1) and decompress from here
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for pos in $(tr "$1\n$2" "\n$2=" < "$4" | grep -abo "^$2"); do
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if ! type -P "$3" > /dev/null; then
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ddebug "Signiature detected but '$3' is missing, skip this decompressor"
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break
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fi
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pos=${pos%%:*}
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tail "-c+$pos" "$img" | $3 > "$5" 2> /dev/null
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if check_vmlinux "$5"; then
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ddebug "Kernel is extracted with '$3'"
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return 0
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fi
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done
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return 1
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}
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# Borrowed from linux/scripts/extract-vmlinux
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get_kernel_size()
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{
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# Prepare temp files:
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local tmp img=$1
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tmp=$(mktemp /tmp/vmlinux-XXX)
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trap 'rm -f "$tmp"' 0
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# Try to check if it's a vmlinux already
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check_vmlinux "$img" && get_vmlinux_size "$img" && return 0
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# That didn't work, so retry after decompression.
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try_decompress '\037\213\010' xy gunzip "$img" "$tmp" ||
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try_decompress '\3757zXZ\000' abcde unxz "$img" "$tmp" ||
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try_decompress 'BZh' xy bunzip2 "$img" "$tmp" ||
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try_decompress '\135\0\0\0' xxx unlzma "$img" "$tmp" ||
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try_decompress '\211\114\132' xy 'lzop -d' "$img" "$tmp" ||
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try_decompress '\002!L\030' xxx 'lz4 -d' "$img" "$tmp" ||
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try_decompress '(\265/\375' xxx unzstd "$img" "$tmp"
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# Finally check for uncompressed images or objects:
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[[ $? -eq 0 ]] && get_vmlinux_size "$tmp" && return 0
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# Fallback to use iomem
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local _size=0 _seg
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while read -r _seg; do
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_size=$((_size + 0x${_seg#*-} - 0x${_seg%-*}))
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done <<< "$(grep -E "Kernel (code|rodata|data|bss)" /proc/iomem | cut -d ":" -f 1)"
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echo $_size
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}
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do_estimate()
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{
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local kdump_mods
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