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// Copyright (C) 2022 Luke Shumaker <lukeshu@lukeshu.com>
//
// SPDX-License-Identifier: GPL-2.0-or-later
package main
import (
"encoding/json"
"fmt"
"os"
"strconv"
"text/tabwriter"
"github.com/datawire/ocibuild/pkg/cliutil"
"github.com/spf13/cobra"
"git.lukeshu.com/btrfs-progs-ng/lib/btrfs"
"git.lukeshu.com/btrfs-progs-ng/lib/btrfs/btrfsitem"
"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/btrfsutil"
"git.lukeshu.com/btrfs-progs-ng/lib/diskio"
"git.lukeshu.com/btrfs-progs-ng/lib/maps"
"git.lukeshu.com/btrfs-progs-ng/lib/slices"
)
func init() {
var nodescanFilename string
cmd := subcommand{
Command: cobra.Command{
Use: "ls-trees",
Short: "A brief view what types of items are in each tree",
Args: cliutil.WrapPositionalArgs(cobra.NoArgs),
},
RunE: func(fs *btrfs.FS, cmd *cobra.Command, _ []string) error {
var scanResults map[btrfsvol.DeviceID]btrfsinspect.ScanOneDevResult
if nodescanFilename != "" {
scanResultsBytes, err := os.ReadFile(nodescanFilename)
if err != nil {
return err
}
if err := json.Unmarshal(scanResultsBytes, &scanResults); err != nil {
return err
}
}
var treeErrCnt int
var treeItemCnt map[btrfsitem.Type]int
flush := func() {
totalItems := 0
for _, cnt := range treeItemCnt {
totalItems += cnt
}
numWidth := len(strconv.Itoa(slices.Max(treeErrCnt, totalItems)))
table := tabwriter.NewWriter(os.Stdout, 0, 8, 2, ' ', 0)
fmt.Fprintf(table, " errors\t% *s\n", numWidth, strconv.Itoa(treeErrCnt))
for _, typ := range maps.SortedKeys(treeItemCnt) {
fmt.Fprintf(table, " %v items\t% *s\n", typ, numWidth, strconv.Itoa(treeItemCnt[typ]))
}
fmt.Fprintf(table, " total items\t% *s\n", numWidth, strconv.Itoa(totalItems))
table.Flush()
}
visitedNodes := make(map[btrfsvol.LogicalAddr]struct{})
btrfsutil.WalkAllTrees(cmd.Context(), fs, btrfsutil.WalkAllTreesHandler{
PreTree: func(name string, treeID btrfs.ObjID) {
treeErrCnt = 0
treeItemCnt = make(map[btrfsitem.Type]int)
fmt.Printf("tree id=%v name=%q\n", treeID, name)
},
Err: func(_ *btrfsutil.WalkError) {
treeErrCnt++
},
TreeWalkHandler: btrfs.TreeWalkHandler{
Node: func(_ btrfs.TreePath, ref *diskio.Ref[btrfsvol.LogicalAddr, btrfs.Node]) error {
visitedNodes[ref.Addr] = struct{}{}
return nil
},
Item: func(_ btrfs.TreePath, item btrfs.Item) error {
typ := item.Key.ItemType
treeItemCnt[typ] = treeItemCnt[typ] + 1
return nil
},
BadItem: func(_ btrfs.TreePath, item btrfs.Item) error {
typ := item.Key.ItemType
treeItemCnt[typ] = treeItemCnt[typ] + 1
return nil
},
},
PostTree: func(_ string, _ btrfs.ObjID) {
flush()
},
})
if nodescanFilename != "" {
treeErrCnt = 0
treeItemCnt = make(map[btrfsitem.Type]int)
fmt.Printf("lost+found\n")
for _, devResults := range scanResults {
for laddr := range devResults.FoundNodes {
if _, visited := visitedNodes[laddr]; visited {
continue
}
visitedNodes[laddr] = struct{}{}
node, err := fs.ReadNode(laddr)
if err != nil {
treeErrCnt++
continue
}
for _, item := range node.Data.BodyLeaf {
typ := item.Key.ItemType
treeItemCnt[typ] = treeItemCnt[typ] + 1
}
}
}
flush()
}
return nil
},
}
cmd.Command.Flags().StringVar(&nodescanFilename, "nodescan", "", "Output of scan-for-nodes to use for a lost+found tree")
if err := cmd.Command.MarkFlagFilename("nodescan"); err != nil {
panic(err)
}
inspectors = append(inspectors, cmd)
}
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