[PATCH 3/4] kdump-lib.sh: Fix is_nfs_dump_target

[Kairui Song]

Previously is_nfs_dump_target didn't cover the case that 'path <value>'
where <value> points to a nfs mount point. This function is never used
in first kernel before so so far it worked.

Signed-off-by: Kairui Song <kasong(a)redhat.com&gt;
---
 kdump-lib.sh | 34 +++++++++++++++++++++++-----------
 1 file changed, 23 insertions(+), 11 deletions(-)

diff --git a/kdump-lib.sh b/kdump-lib.sh
index d35282d..8aad556 100755
--- a/kdump-lib.sh
+++ b/kdump-lib.sh
@@ -28,6 +28,11 @@ perror() {
     echo $@ >&2
 }
 
+is_fs_type_nfs()
+{
+    [ "$1" = "nfs" ] || [ "$1" = "nfs4" ]
+}
+
 is_ssh_dump_target()
 {
     grep -q "^ssh[[:blank:]].*@" /etc/kdump.conf
@@ -35,8 +40,23 @@ is_ssh_dump_target()
 
 is_nfs_dump_target()
 {
-    grep -q "^nfs" /etc/kdump.conf || \
-        [[ $(get_dracut_args_fstype "$(grep "^dracut_args .*\-\-mount"
/etc/kdump.conf)") = nfs* ]]
+    if grep -q "^nfs" /etc/kdump.conf; then
+        return 0;
+    fi
+
+    if is_fs_type_nfs $(get_dracut_args_fstype "$(grep "^dracut_args
.*\-\-mount" /etc/kdump.conf)"); then
+        return 0
+    fi
+
+    local _save_path=$(get_save_path)
+    local _target=$(get_target_from_path $_save_path)
+    local _fstype=$(get_fs_type_from_target $_target)
+
+    if is_fs_type_nfs $_fstype; then
+        return 0
+    fi
+
+    return 1
 }
 
 is_raw_dump_target()
@@ -44,13 +64,6 @@ is_raw_dump_target()
     grep -q "^raw" /etc/kdump.conf
 }
 
-is_fs_type_nfs()
-{
-    local _fstype=$1
-    [ $_fstype = "nfs" ] || [ $_fstype = "nfs4" ] && return
0
-    return 1
-}
-
 is_fs_dump_target()
 {
     egrep -q "^ext[234]|^xfs|^btrfs|^minix" /etc/kdump.conf
@@ -104,8 +117,7 @@ to_dev_name() {
 
 is_user_configured_dump_target()
 {
-    return $(is_mount_in_dracut_args || is_ssh_dump_target || is_nfs_dump_target || \
-             is_raw_dump_target || is_fs_dump_target)
+    grep -q "^ext[234]|^xfs|^btrfs|^minix|^raw|^nfs|^ssh" /etc/kdump.conf ||
is_mount_in_dracut_args;
 }
 
 get_user_configured_dump_disk()
-- 
2.23.0