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// Copyright (C) 2022 Luke Shumaker <lukeshu@lukeshu.com>
//
// SPDX-License-Identifier: GPL-2.0-or-later
package rebuildnodes
import (
"context"
"fmt"
"time"
"github.com/datawire/dlib/dlog"
"git.lukeshu.com/btrfs-progs-ng/lib/btrfs"
"git.lukeshu.com/btrfs-progs-ng/lib/btrfs/btrfstree"
"git.lukeshu.com/btrfs-progs-ng/lib/btrfs/btrfsvol"
"git.lukeshu.com/btrfs-progs-ng/lib/btrfsprogs/btrfsinspect"
"git.lukeshu.com/btrfs-progs-ng/lib/btrfsprogs/btrfsinspect/rebuildnodes/graph"
"git.lukeshu.com/btrfs-progs-ng/lib/containers"
"git.lukeshu.com/btrfs-progs-ng/lib/textui"
)
type scanStats struct {
N, D int
}
func (s scanStats) String() string {
return fmt.Sprintf("... %v%% (%v/%v)",
int(100*float64(s.N)/float64(s.D)),
s.N, s.D)
}
func ScanDevices(ctx context.Context, fs *btrfs.FS, scanResults btrfsinspect.ScanDevicesResult) (graph.Graph, error) {
dlog.Infof(ctx, "Reading node data from FS...")
sb, err := fs.Superblock()
if err != nil {
return graph.Graph{}, err
}
total := countNodes(scanResults)
done := 0
progressWriter := textui.NewProgress[scanStats](ctx, dlog.LogLevelInfo, 1*time.Second)
progress := func(done, total int) {
progressWriter.Set(scanStats{N: done, D: total})
}
nodeGraph := graph.New(*sb)
progress(done, total)
for _, devResults := range scanResults {
for laddr := range devResults.FoundNodes {
nodeRef, err := btrfstree.ReadNode[btrfsvol.LogicalAddr](fs, *sb, laddr, btrfstree.NodeExpectations{
LAddr: containers.Optional[btrfsvol.LogicalAddr]{OK: true, Val: laddr},
})
if err != nil {
return graph.Graph{}, err
}
nodeGraph.InsertNode(nodeRef)
done++
progress(done, total)
}
}
if done != total {
panic("should not happen")
}
progressWriter.Done()
dlog.Info(ctx, "... done reading node data")
progressWriter = textui.NewProgress[scanStats](ctx, dlog.LogLevelInfo, 1*time.Second)
dlog.Infof(ctx, "Checking keypointers for dead-ends...")
if err := nodeGraph.FinalCheck(fs, *sb, progress); err != nil {
return graph.Graph{}, err
}
progressWriter.Done()
dlog.Info(ctx, "... done checking keypointers")
return *nodeGraph, nil
}
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