From e495e47515bda44ee81a7323f5318e7f45aa042a Mon Sep 17 00:00:00 2001
From: Erich Eckner <git@eckner.net>
Date: Mon, 8 Apr 2019 11:20:07 +0200
Subject:  Initial commit

---
 kamikaze-fsck | 62 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 62 insertions(+)
 create mode 100755 kamikaze-fsck

diff --git a/kamikaze-fsck b/kamikaze-fsck
new file mode 100755
index 0000000..6858a8a
--- /dev/null
+++ b/kamikaze-fsck
@@ -0,0 +1,62 @@
+#!/bin/bash
+
+if [ $# -ne 1 ] || [ ! -b "$1" ]; then
+  >&2 echo 'run:'
+  >&2 echo '  kamikaze-fsck /dev/$device'
+  exit 1
+fi
+
+if ! [ -w "$1" ]; then
+  >&2 printf 'Cannot write to "%s" - you are not root, are you?\n' "$1"
+  exit 1
+fi
+
+>&2 printf 'Warning: running e2fsck in kamikaze-mode - this WILL destroy data on "%s".\n' "$1"
+>&2 printf 'Enter uppercase yes to continue.\n'
+read -r s
+if [ "$s" != 'YES' ]; then
+  >&2 echo 'aborted.'
+  exit 1
+fi
+
+>&2 echo 'ok, lets do it'
+
+tmp_dir=$(mktemp -d)
+trap 'rm -rf --one-file-system "${tmp_dir}"' EXIT
+
+touch "${tmp_dir}/faulty-inode"
+
+while [ -f "${tmp_dir}/faulty-inode" ]; do
+  if [ -s "${tmp_dir}/faulty-inode" ]; then
+    debugfs -w "$1" -R "$(cat "${tmp_dir}/faulty-inode")"
+  fi
+  rm "${tmp_dir}/faulty-inode"
+
+  last_faulty_inode='INVALID'
+
+  e2fsck -f -y "$1" -E no_optimize_extents,fixes_only -C 0 \
+  | tee /dev/stderr \
+  | sed '
+    s/^Inode \([0-9]\+\) block [0-9]\+ conflicts with critical metadata, skipping block checks\.$/\1/
+    t
+    d
+  ' \
+  | while read -r faulty_inode; do
+    if [ "${last_faulty_inode}" != "${faulty_inode}" ]; then
+      last_faulty_inode="${faulty_inode}"
+      faulty_inode_count=0
+    fi
+    faulty_inode_count=$((faulty_inode_count+1))
+    if [ ${faulty_inode_count} -ge 5 ]; then
+      printf 'clri <%s>\n' "${faulty_inode}" \
+      >> "${tmp_dir}/faulty-inode"
+
+      pkill -xf "e2fsck -f -y $1 -E no_optimize_extents,fixes_only -C 0"
+      sleep 20
+      pkill -9 -xf "e2fsck -f -y $1 -E no_optimize_extents,fixes_only -C 0"
+      while pgrep -xf "e2fsck -f -y $1 -E no_optimize_extents,fixes_only -C 0"; do
+        sleep 1
+      done
+    fi
+  done
+done
-- 
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