From 631568681ef7beb157a36b3e3db4097ec36854e0 Mon Sep 17 00:00:00 2001
From: Kroese <kroese@users.noreply.github.com>
Date: Tue, 19 Dec 2023 06:01:50 +0100
Subject: [PATCH] feat: Detect COW on BTRFS

---
 src/install.sh | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/src/install.sh b/src/install.sh
index aa106a4..1190c1c 100644
--- a/src/install.sh
+++ b/src/install.sh
@@ -55,6 +55,13 @@ FS=$(stat -f -c %T "$STORAGE")
 if [[ "$FS" == "overlay"* ]]; then
   info "Warning: the filesystem of $STORAGE is OverlayFS, this usually means it was binded to an invalid path!"
 fi
+if [[ "$FS" == "btrfs"* ]]; then
+  FA=$(lsattr -d "$STORAGE")
+  if [[ "$FA" != *"C"* ]]; then
+    info "Warning: the filesystem of $STORAGE is BTRFS, and COW (copy on write) is not disabled for that folder!"
+    info "This will negatively affect write performance, please empty the folder and disable COW (chattr +C <path>)."
+  fi
+fi
 
 if [[ "$FS" != "fat"* && "$FS" != "vfat"* && "$FS" != "exfat"* && \
         "$FS" != "ntfs"* && "$FS" != "fuse"* && "$FS" != "msdos"* ]]; then