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kdump-lib: Add the new function to enhance bind mounted judgement

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findmnt uses the option "-v, --nofsroot" to exclude the [/dir] in the
SOURCE column for bind-mounts, then if $_mntpoint equals to
$_mntpoint_nofsroot, the mountpoint is not bind mounted directory.

the value of $_mntpoint may be like
/dev/mapper/atomicos-root[/ostree/deploy/rhel-atomic-host/var], if the
directory is bind mounted. The former part represents the device path, the
rest part is the bind mounted directory which quotes by bracket "[]".

Signed-off-by: Minfei Huang <mhuang@redhat.com>
Acked-by: Dave Young <dyoung@redhat.com>
Acked-by: Baoquan He <bhe@redhat.com>
This commit is contained in:
Minfei Huang 2015-04-17 16:26:24 +08:00 committed by Baoquan He
parent fedeba5e4b
commit ef94190ce5
1 changed files with 32 additions and 0 deletions
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32
kdump-lib.sh
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@ -86,6 +86,38 @@ get_root_fs_device()
return
}
# findmnt uses the option "-v, --nofsroot" to exclusive the [/dir]
# in the SOURCE column for bind-mounts, then if $_mntpoint equals to
# $_mntpoint_nofsroot, the mountpoint is not bind mounted directory.
is_bind_mount()
{
local _mntpoint=$(findmnt $1 | tail -n 1 | awk '{print $2}')
local _mntpoint_nofsroot=$(findmnt -v $1 | tail -n 1 | awk '{print $2}')
if [[ $_mntpoint = $_mntpoint_nofsroot ]]; then
return 1
else
return 0
fi
}
# Below is just an example for mount info
# /dev/mapper/atomicos-root[/ostree/deploy/rhel-atomic-host/var], if the
# directory is bind mounted. The former part represents the device path, rest
# part is the bind mounted directory which quotes by bracket "[]".
get_bind_mount_directory()
{
local _mntpoint=$(findmnt $1 | tail -n 1 | awk '{print $2}')
local _mntpoint_nofsroot=$(findmnt -v $1 | tail -n 1 | awk '{print $2}')
_mntpoint=${_mntpoint#*$_mntpoint_nofsroot}
_mntpoint=${_mntpoint#[}
_mntpoint=${_mntpoint%]}
echo $_mntpoint
}
get_mntpoint_from_path()
{
echo $(df $1 | tail -1 | awk '{print $NF}')