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kdump-lib.sh: add fstab failback helper for getting mount info 

This allows look up mount info even if target is not mounted.

Signed-off-by: Kairui Song <kasong@redhat.com>
Acked-by: Pingfan Liu <piliu@redhat.com>
This commit is contained in:
Kairui Song 2020-03-12 13:52:55 +08:00
parent 70deeb474b
commit be578f6382
1 changed files with 18 additions and 3 deletions
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21
kdump-lib.sh
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@ -236,7 +236,7 @@ get_bind_mount_source()
echo $_mntpoint$_path
}
# Return the real underlaying device of a path, ignore bind mounts
# Return the current underlaying device of a path, ignore bind mounts
get_target_from_path()
{
local _target
@ -251,16 +251,31 @@ is_mounted()
findmnt -k -n $1 &>/dev/null
}
get_mount_info()
{
local _info_type=$1 _src_type=$2 _src=$3; shift 3
local _info=$(findmnt --real -k -n -r -o $_info_type --$_src_type $_src $@)
[ -z "$_info" ] && [ -e "/etc/fstab" ] && _info=$(findmnt --real -s -n -r -o $_info_type --$_src_type $_src $@)
echo $_info
}
get_fs_type_from_target()
{
findmnt -k -f -n -r -o FSTYPE $1
get_mount_info FSTYPE source $1 -f
}
get_mntopt_from_target()
{
get_mount_info OPTIONS source $1 -f
}
# Find the general mount point of a dump target, not the bind mount point
get_mntpoint_from_target()
{
# Expcilitly specify --source to findmnt could ensure non-bind mount is returned
findmnt -k -f -n -r -o TARGET --source $1
get_mount_info TARGET source $1 -f
}
# Get the path where the target will be mounted in kdump kernel