From c47bf4777cc7547065c77e5d7e6f75b39628f979 Mon Sep 17 00:00:00 2001
From: Andrea Rogers <targetdisk1394@gmail.com>
Date: Sat, 2 Nov 2024 23:03:54 -0500
Subject: [PATCH] [NEW] fs: Add btrfs and "simplefs" helpers

---
 mk/btrfs.mk    | 45 +++++++++++++++++++++++++++++++++++++++++++++
 mk/simplefs.mk | 11 +++++++++++
 2 files changed, 56 insertions(+)
 create mode 100644 mk/btrfs.mk
 create mode 100644 mk/simplefs.mk

diff --git a/mk/btrfs.mk b/mk/btrfs.mk
new file mode 100644
index 0000000..73436a1
--- /dev/null
+++ b/mk/btrfs.mk
@@ -0,0 +1,45 @@
+FSOPTS ?= defaults,discard,ssd,noatime
+
+$(MOUNTPOINT)/.subvols-done: $(BLKDEV)$(P)2 $(MOUNTPOINT)
+	$(DOSU) mount -o $(FSOPTS) $(BLKDEV)$(P)$(ROOTFS_PART) $(MOUNTPOINT)
+	cd $(MOUNTPOINT) && \
+		$(DOSU) btrfs subvolume create alp-root-$(PLATFORM)-$(ARCH) && \
+		$(DOSU) btrfs subvolume create home && \
+		$(DOSU) btrfs subvolume create root && \
+		cd alp-root-$(PLATFORM)-$(ARCH) && \
+		  $(DOSU) mkdir home root && \
+		  $(DOSU) btrfs subvolume create etc && \
+		  $(DOSU) btrfs subvolume create var && \
+		  $(DOSU) btrfs subvolume create usr && \
+		  $(DOSU) btrfs subvolume create opt
+	$(DOSU) umount $(MOUNTPOINT)
+	$(DOSU) mount -o $(FSOPTS),subvol=/alp-root-$(PLATFORM)-$(ARCH) \
+		$(BLKDEV)$(P)$(ROOTFS_PART) $(MOUNTPOINT)
+	$(DOSU) mount -o $(FSOPTS),subvol=/home \
+		$(BLKDEV)$(P)$(ROOTFS_PART) $(MOUNTPOINT)/home
+	$(DOSU) mount -o $(FSOPTS),subvol=/root \
+		$(BLKDEV)$(P)$(ROOTFS_PART) $(MOUNTPOINT)/root
+	$(DOSU) mount -o $(FSOPTS),subvol=/alp-root-$(PLATFORM)-$(ARCH)/etc \
+		$(BLKDEV)$(P)$(ROOTFS_PART) $(MOUNTPOINT)/etc
+	$(DOSU) mount -o $(FSOPTS),subvol=/alp-root-$(PLATFORM)-$(ARCH)/var \
+		$(BLKDEV)$(P)$(ROOTFS_PART) $(MOUNTPOINT)/var
+	$(DOSU) mount -o $(FSOPTS),subvol=/alp-root-$(PLATFORM)-$(ARCH)/usr \
+		$(BLKDEV)$(P)$(ROOTFS_PART) $(MOUNTPOINT)/usr
+	$(DOSU) mount -o $(FSOPTS),subvol=/alp-root-$(PLATFORM)-$(ARCH)/opt \
+		$(BLKDEV)$(P)$(ROOTFS_PART) $(MOUNTPOINT)/opt
+	$(DOSU) touch $@
+
+$(MOUNTPOINT)/.mount-done: $(MOUNTPOINT)/.subvols-done
+	$(DOSU) mkdir -p $(MOUNTPOINT)/boot
+	$(DOSU) mount -o defaults,discard $(BLKDEV)$(P)$(BOOTFS_PART) $(MOUNTPOINT)/boot
+	$(DOSU) touch $@
+
+umount:
+	$(DOSU) umount $(MOUNTPOINT)/boot || :
+	$(DOSU) umount $(MOUNTPOINT)/etc || :
+	$(DOSU) umount $(MOUNTPOINT)/home || :
+	$(DOSU) umount $(MOUNTPOINT)/opt || :
+	$(DOSU) umount $(MOUNTPOINT)/root || :
+	$(DOSU) umount $(MOUNTPOINT)/usr || :
+	$(DOSU) umount $(MOUNTPOINT)/var || :
+	$(DOSU) umount $(MOUNTPOINT) || :
diff --git a/mk/simplefs.mk b/mk/simplefs.mk
new file mode 100644
index 0000000..6c2c5a7
--- /dev/null
+++ b/mk/simplefs.mk
@@ -0,0 +1,11 @@
+FSOPTS ?= defaults,discard,noatime
+
+$(MOUNTPOINT)/.mount-done: $(BLKDEV)$(P)2 $(MOUNTPOINT)
+	$(DOSU) mount -o $(FSOPTS) $(BLKDEV)$(P)$(ROOTFS_PART) $(MOUNTPOINT)
+	$(DOSU) mkdir -p $(MOUNTPOINT)/boot
+	$(DOSU) mount -o $(FSOPTS) $(BLKDEV)$(P)$(BOOTFS_PART) $(MOUNTPOINT)/boot
+	$(DOSU) touch $@
+
+umount:
+	$(DOSU) umount $(MOUNTPOINT)/boot || :
+	$(DOSU) umount $(MOUNTPOINT) || :