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kdump-lib: Introduce parse_kver_from_path() to get kernel version from its path name

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kdump_get_arch_recommend_crashkernel() expects the kernel version info,
while _update_kernel() provides the absolute path, which contains the
kernel version info.

This patch introduce a dedicated function parse_kver_from_path() to
extract the kernel info from the path

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>
This commit is contained in:
Pingfan Liu 2023-06-13 17:43:21 +08:00 committed by Coiby Xu
parent 51efbcf83e
commit d8b961be37
1 changed files with 43 additions and 0 deletions
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43
kdump-lib.sh
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@ -526,6 +526,49 @@ prepare_kdump_kernel()
echo "$kdump_kernel"
}
_is_valid_kver()
{
[[ -f /usr/lib/modules/$1/modules.dep ]]
}
# This function is introduced since 64k variant may be installed on 4k or vice versa
# $1 the kernel path name.
parse_kver_from_path()
{
local _img _kver
[[ -z "$1" ]] && return
_img=$1
BLS_ENTRY_TOKEN=$(</etc/machine-id)
# Fedora standard installation, i.e. $BOOT/vmlinuz-<version>
_kver=${_img##*/vmlinuz-}
_kver=${_kver%"$KDUMP_IMG_EXT"}
if _is_valid_kver "$_kver"; then
echo "$_kver"
return
fi
# BLS recommended image names, i.e. $BOOT/<token>/<version>/linux
_kver=${_img##*/"$BLS_ENTRY_TOKEN"/}
_kver=${_kver%%/*}
if _is_valid_kver "$_kver"; then
echo "$_kver"
return
fi
# Fedora UKI installation, i.e. $BOOT/efi/EFI/Linux/<token>-<version>.efi
_kver=${_img##*/"$BLS_ENTRY_TOKEN"-}
_kver=${_kver%.efi}
if _is_valid_kver "$_kver"; then
echo "$_kver"
return
fi
ddebug "Could not parse version from $_img"
}
_get_kdump_kernel_version()
{
local _version _version_nondebug