From 432fcca3deb80e7faa362e508604238ce295053d Mon Sep 17 00:00:00 2001
From: Luke Shumaker <lukeshu@lukeshu.com>
Date: Tue, 2 Aug 2022 03:30:54 -0600
Subject: lib: feat: Add ScanDevices

---
 .../btrfsinspect/rebuildmappings/blockgroups.go    |  6 ++---
 lib/btrfsprogs/btrfsinspect/scandevices.go         | 28 ++++++++++++++++++++++
 2 files changed, 30 insertions(+), 4 deletions(-)

(limited to 'lib')

diff --git a/lib/btrfsprogs/btrfsinspect/rebuildmappings/blockgroups.go b/lib/btrfsprogs/btrfsinspect/rebuildmappings/blockgroups.go
index 15df6da..2621c44 100644
--- a/lib/btrfsprogs/btrfsinspect/rebuildmappings/blockgroups.go
+++ b/lib/btrfsprogs/btrfsinspect/rebuildmappings/blockgroups.go
@@ -16,8 +16,6 @@ import (
 	"git.lukeshu.com/btrfs-progs-ng/lib/maps"
 )
 
-type NodeScanResults = map[btrfsvol.DeviceID]btrfsinspect.ScanOneDeviceResult
-
 type BlockGroup struct {
 	LAddr btrfsvol.LogicalAddr
 	Size  btrfsvol.AddrDelta
@@ -30,7 +28,7 @@ func ReadNodeScanResults(fs *btrfs.FS, filename string) (map[btrfsvol.LogicalAdd
 		return nil, err
 	}
 
-	var scanResults NodeScanResults
+	var scanResults btrfsinspect.ScanDevicesResult
 	if err := json.Unmarshal(scanResultsBytes, &scanResults); err != nil {
 		return nil, err
 	}
@@ -43,7 +41,7 @@ func ReadNodeScanResults(fs *btrfs.FS, filename string) (map[btrfsvol.LogicalAdd
 	return bgTree, nil
 }
 
-func ReduceScanResults(fs *btrfs.FS, scanResults NodeScanResults) (map[btrfsvol.LogicalAddr]BlockGroup, error) {
+func ReduceScanResults(fs *btrfs.FS, scanResults btrfsinspect.ScanDevicesResult) (map[btrfsvol.LogicalAddr]BlockGroup, error) {
 	// Reduce
 	bgSet := make(map[BlockGroup]struct{})
 	for _, found := range scanResults {
diff --git a/lib/btrfsprogs/btrfsinspect/scandevices.go b/lib/btrfsprogs/btrfsinspect/scandevices.go
index c590d81..e28d35e 100644
--- a/lib/btrfsprogs/btrfsinspect/scandevices.go
+++ b/lib/btrfsprogs/btrfsinspect/scandevices.go
@@ -8,7 +8,9 @@ import (
 	"context"
 	"errors"
 	"fmt"
+	"sync"
 
+	"github.com/datawire/dlib/dgroup"
 	"github.com/datawire/dlib/dlog"
 
 	"git.lukeshu.com/btrfs-progs-ng/lib/btrfs"
@@ -18,6 +20,32 @@ import (
 	"git.lukeshu.com/btrfs-progs-ng/lib/slices"
 )
 
+type ScanDevicesResult map[btrfsvol.DeviceID]ScanOneDeviceResult
+
+func ScanDevices(ctx context.Context, fs *btrfs.FS, sb btrfs.Superblock) (ScanDevicesResult, error) {
+	grp := dgroup.NewGroup(ctx, dgroup.GroupConfig{})
+	var mu sync.Mutex
+	result := make(map[btrfsvol.DeviceID]ScanOneDeviceResult)
+	for id, dev := range fs.LV.PhysicalVolumes() {
+		id := id
+		dev := dev
+		grp.Go(dev.Name(), func(ctx context.Context) error {
+			devResult, err := ScanOneDevice(ctx, dev, sb)
+			if err != nil {
+				return err
+			}
+			mu.Lock()
+			result[id] = devResult
+			mu.Unlock()
+			return nil
+		})
+	}
+	if err := grp.Wait(); err != nil {
+		return nil, err
+	}
+	return result, nil
+}
+
 type ScanOneDeviceResult struct {
 	Checksums        SumRun[btrfsvol.PhysicalAddr]
 	FoundNodes       map[btrfsvol.LogicalAddr][]btrfsvol.PhysicalAddr
-- 
cgit v1.2.3-2-g168b