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// Copyright (C) 2022 Luke Shumaker <lukeshu@lukeshu.com>
//
// SPDX-License-Identifier: GPL-2.0-or-later
package main
import (
"bufio"
"context"
"os"
"sync"
"git.lukeshu.com/go/lowmemjson"
"github.com/datawire/dlib/dgroup"
"github.com/datawire/dlib/dlog"
"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/btrfsvol"
"git.lukeshu.com/btrfs-progs-ng/lib/btrfsprogs/btrfsinspect"
)
func init() {
inspectors = append(inspectors, subcommand{
Command: cobra.Command{
Use: "scandevices",
Args: cliutil.WrapPositionalArgs(cobra.NoArgs),
},
RunE: func(fs *btrfs.FS, cmd *cobra.Command, _ []string) (err error) {
maybeSetErr := func(_err error) {
if err == nil && _err != nil {
err = _err
}
}
ctx := cmd.Context()
var resultsMu sync.Mutex
results := make(map[btrfsvol.DeviceID]btrfsinspect.ScanOneDeviceResult)
grp := dgroup.NewGroup(ctx, dgroup.GroupConfig{})
for _, dev := range fs.LV.PhysicalVolumes() {
dev := dev
grp.Go(dev.Name(), func(ctx context.Context) error {
superblock, err := dev.Superblock()
if err != nil {
return err
}
dlog.Infof(ctx, "dev[%q] Scanning for unreachable nodes...", dev.Name())
devResult, err := btrfsinspect.ScanOneDevice(ctx, dev, *superblock)
dlog.Infof(ctx, "dev[%q] Finished scanning", dev.Name())
resultsMu.Lock()
results[superblock.DevItem.DevID] = devResult
resultsMu.Unlock()
return err
})
}
if err := grp.Wait(); err != nil {
return err
}
dlog.Info(ctx, "Writing scan results to stdout...")
buffer := bufio.NewWriter(os.Stdout)
defer func() {
maybeSetErr(buffer.Flush())
}()
return lowmemjson.Encode(&lowmemjson.ReEncoder{
Out: buffer,
Indent: "\t",
}, results)
},
})
}
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