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kdump-lib: Introduce a help function _crashkernel_add()

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Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=2160676
Upstream: Fedora rawhide
Conflict: Drop shellspec test case

commit 51efbcf83e
Author: Pingfan Liu <piliu@redhat.com>
Date:   Tue Jun 13 17:43:20 2023 +0800

    kdump-lib: Introduce a help function _crashkernel_add()

    This help function can manipulate the crashkernel cmdline by adding an
    number for each item. Also a basic test case for _crashkernel_add() is
    provided in this patch.

    Credit to Philipp, who contributes the original code.

    Signed-off-by: Pingfan Liu <piliu@redhat.com>
    Reviewed-by: Coiby Xu <coxu@redhat.com>
    Reviewed-by: Philipp Rudo <prudo@redhat.com>

Signed-off-by: Pingfan Liu <piliu@redhat.com>
This commit is contained in:
Pingfan Liu 2023-06-13 17:43:20 +08:00
parent cb850aec26
commit 37de94d02a
1 changed files with 58 additions and 0 deletions
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58
kdump-lib.sh
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@ -904,6 +904,64 @@ get_recommend_size()
echo "0M"
}
# $1 crashkernel=""
# $2 delta in unit of MB
_crashkernel_add()
{
local _ck _add _entry _ret
local _range _size _offset
_ck="$1"
_add="$2"
_ret=""
if [[ "$_ck" == *@* ]]; then
_offset="@${_ck##*@}"
_ck=${_ck%@*}
elif [[ "$_ck" == *,high ]] || [[ "$_ck" == *,low ]]; then
_offset=",${_ck##*,}"
_ck=${_ck%,*}
else
_offset=''
fi
while read -d , -r _entry; do
[[ -n "$_entry" ]] || continue
if [[ "$_entry" == *:* ]]; then
_range=${_entry%:*}
_size=${_entry#*:}
else
_range=""
_size=${_entry}
fi
case "${_size: -1}" in
K)
_size=${_size::-1}
_size="$((_size + (_add * 1024)))K"
;;
M)
_size=${_size::-1}
_size="$((_size + _add))M"
;;
G)
_size=${_size::-1}
_size="$((_size * 1024 + _add))M"
;;
*)
_size="$((_size + (_add * 1024 * 1024)))"
;;
esac
[[ -n "$_range" ]] && _ret+="$_range:"
_ret+="$_size,"
done <<< "$_ck,"
_ret=${_ret%,}
[[ -n "$_offset" ]] && _ret+=$_offset
echo "$_ret"
}
# get default crashkernel
# $1 dump mode, if not specified, dump_mode will be judged by is_fadump_capable
kdump_get_arch_recommend_crashkernel()