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 2023-05-05 17:14:40 +02:00 committed by Coiby Xu
parent 0ff44ca6e8
commit 81d89c885f
2 changed files with 72 additions and 72 deletions

View File

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

View File

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