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package shell
import (
"flag"
"fmt"
"io"
"os"
"strings"
"time"
"google.golang.org/protobuf/proto"
"github.com/seaweedfs/seaweedfs/weed/pb/filer_pb"
"github.com/seaweedfs/seaweedfs/weed/util"
)
func init() {
Commands = append(Commands, &commandFsMetaLoad{})
}
type commandFsMetaLoad struct {
dirPrefix *string
}
func (c *commandFsMetaLoad) Name() string {
return "fs.meta.load"
}
func (c *commandFsMetaLoad) Help() string {
return `load saved filer meta data to restore the directory and file structure
fs.meta.load <filer_host>-<port>-<time>.meta
fs.meta.load -v=false <filer_host>-<port>-<time>.meta // skip printing out the verbose output
fs.meta.load -dirPrefix=/buckets/important* <filer_host>.meta // load any dirs with prefix "important"
`
}
func (c *commandFsMetaLoad) Do(args []string, commandEnv *CommandEnv, writer io.Writer) (err error) {
if len(args) == 0 {
fmt.Fprintf(writer, "missing a metadata file\n")
return nil
}
fileName := args[len(args)-1]
metaLoadCommand := flag.NewFlagSet(c.Name(), flag.ContinueOnError)
c.dirPrefix = metaLoadCommand.String("dirPrefix", "", "load entries only with directories matching prefix")
verbose := metaLoadCommand.Bool("v", true, "verbose mode")
if err = metaLoadCommand.Parse(args[0 : len(args)-1]); err != nil {
return nil
}
dst, err := os.OpenFile(fileName, os.O_RDONLY, 0644)
if err != nil {
return nil
}
defer dst.Close()
var dirCount, fileCount uint64
lastLogTime := time.Now()
err = commandEnv.WithFilerClient(false, func(client filer_pb.SeaweedFilerClient) error {
sizeBuf := make([]byte, 4)
for {
if n, err := dst.Read(sizeBuf); n != 4 {
if err == io.EOF {
return nil
}
return err
}
size := util.BytesToUint32(sizeBuf)
data := make([]byte, int(size))
if n, err := dst.Read(data); n != len(data) {
return err
}
fullEntry := &filer_pb.FullEntry{}
if err = proto.Unmarshal(data, fullEntry); err != nil {
return err
}
// check collection name pattern
entryFullName := string(util.FullPath(fullEntry.Dir).Child(fullEntry.Entry.Name))
if *c.dirPrefix != "" {
if !strings.HasPrefix(fullEntry.Dir, *c.dirPrefix) {
if *verbose {
fmt.Fprintf(writer, "not match dir prefix %s\n", entryFullName)
}
continue
}
}
if *verbose || lastLogTime.Add(time.Second).Before(time.Now()) {
if !*verbose {
lastLogTime = time.Now()
}
fmt.Fprintf(writer, "load %s\n", entryFullName)
}
fullEntry.Entry.Name = strings.ReplaceAll(fullEntry.Entry.Name, "/", "x")
if err := filer_pb.CreateEntry(client, &filer_pb.CreateEntryRequest{
Directory: fullEntry.Dir,
Entry: fullEntry.Entry,
}); err != nil {
return err
}
if fullEntry.Entry.IsDirectory {
dirCount++
} else {
fileCount++
}
}
})
if err == nil {
fmt.Fprintf(writer, "\ntotal %d directories, %d files", dirCount, fileCount)
fmt.Fprintf(writer, "\n%s is loaded.\n", fileName)
}
return err
}
|
