From a0daaacdd61f196fbc0ca90ed996e7eeb4d4fcdd Mon Sep 17 00:00:00 2001
From: Luke Shumaker <lukeshu@lukeshu.com>
Date: Mon, 11 Jul 2022 22:48:35 -0600
Subject: move chunk reconstruction to btrfsinspect, add --mappings

---
 lib/btrfsprogs/btrfsinspect/print_addrspace.go | 77 ++++++++++++++++++++++++++
 1 file changed, 77 insertions(+)
 create mode 100644 lib/btrfsprogs/btrfsinspect/print_addrspace.go

(limited to 'lib/btrfsprogs/btrfsinspect/print_addrspace.go')

diff --git a/lib/btrfsprogs/btrfsinspect/print_addrspace.go b/lib/btrfsprogs/btrfsinspect/print_addrspace.go
new file mode 100644
index 0000000..d291b7c
--- /dev/null
+++ b/lib/btrfsprogs/btrfsinspect/print_addrspace.go
@@ -0,0 +1,77 @@
+// Copyright (C) 2022  Luke Shumaker <lukeshu@lukeshu.com>
+//
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+package btrfsinspect
+
+import (
+	"fmt"
+	"io"
+	"sort"
+
+	"golang.org/x/text/message"
+
+	"git.lukeshu.com/btrfs-progs-ng/lib/btrfs"
+	"git.lukeshu.com/btrfs-progs-ng/lib/btrfs/btrfsvol"
+)
+
+func PrintLogicalSpace(out io.Writer, fs *btrfs.FS) {
+	mappings := fs.LV.Mappings()
+	var prevBeg, prevEnd btrfsvol.LogicalAddr
+	var sumHole, sumChunk btrfsvol.AddrDelta
+	for _, mapping := range mappings {
+		if mapping.LAddr > prevEnd {
+			size := mapping.LAddr.Sub(prevEnd)
+			fmt.Fprintf(out, "logical_hole laddr=%v size=%v\n", prevEnd, size)
+			sumHole += size
+		}
+		if mapping.LAddr != prevBeg {
+			if mapping.Flags == nil {
+				fmt.Fprintf(out, "chunk laddr=%v size=%v flags=(missing)\n",
+					mapping.LAddr, mapping.Size)
+			} else {
+				fmt.Fprintf(out, "chunk laddr=%v size=%v flags=%v\n",
+					mapping.LAddr, mapping.Size, *mapping.Flags)
+			}
+		}
+		fmt.Fprintf(out, "\tstripe dev_id=%v paddr=%v\n",
+			mapping.PAddr.Dev, mapping.PAddr.Addr)
+		sumChunk += mapping.Size
+		prevBeg = mapping.LAddr
+		prevEnd = mapping.LAddr.Add(mapping.Size)
+	}
+	p := message.NewPrinter(message.MatchLanguage("en"))
+	p.Fprintf(out, "total logical holes      = %v (%d)\n", sumHole, int64(sumHole))
+	p.Fprintf(out, "total logical chunks     = %v (%d)\n", sumChunk, int64(sumChunk))
+	p.Fprintf(out, "total logical addr space = %v (%d)\n", prevEnd, int64(prevEnd))
+}
+
+func PrintPhysicalSpace(out io.Writer, fs *btrfs.FS) {
+	mappings := fs.LV.Mappings()
+	sort.Slice(mappings, func(i, j int) bool {
+		return mappings[i].PAddr.Cmp(mappings[j].PAddr) < 0
+	})
+
+	var prevDev btrfsvol.DeviceID = 0
+	var prevEnd btrfsvol.PhysicalAddr
+	var sumHole, sumExt btrfsvol.AddrDelta
+	for _, mapping := range mappings {
+		if mapping.PAddr.Dev != prevDev {
+			prevDev = mapping.PAddr.Dev
+			prevEnd = 0
+		}
+		if mapping.PAddr.Addr > prevEnd {
+			size := mapping.PAddr.Addr.Sub(prevEnd)
+			fmt.Fprintf(out, "physical_hole paddr=%v size=%v\n", prevEnd, size)
+			sumHole += size
+		}
+		fmt.Fprintf(out, "devext dev=%v paddr=%v size=%v laddr=%v\n",
+			mapping.PAddr.Dev, mapping.PAddr.Addr, mapping.Size, mapping.LAddr)
+		sumExt += mapping.Size
+		prevEnd = mapping.PAddr.Addr.Add(mapping.Size)
+	}
+	p := message.NewPrinter(message.MatchLanguage("en"))
+	p.Fprintf(out, "total physical holes      = %v (%d)\n", sumHole, int64(sumHole))
+	p.Fprintf(out, "total physical extents    = %v (%d)\n", sumExt, int64(sumExt))
+	p.Fprintf(out, "total physical addr space = %v (%d)\n", prevEnd, int64(prevEnd))
+}
-- 
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