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package filesys
import (
"context"
"io"
"os"
"sort"
"time"
"github.com/seaweedfs/fuse"
"github.com/seaweedfs/fuse/fs"
"github.com/chrislusf/seaweedfs/weed/filer"
"github.com/chrislusf/seaweedfs/weed/util/log"
"github.com/chrislusf/seaweedfs/weed/pb/filer_pb"
"github.com/chrislusf/seaweedfs/weed/util"
)
const blockSize = 512
var _ = fs.Node(&File{})
var _ = fs.NodeOpener(&File{})
var _ = fs.NodeFsyncer(&File{})
var _ = fs.NodeSetattrer(&File{})
var _ = fs.NodeGetxattrer(&File{})
var _ = fs.NodeSetxattrer(&File{})
var _ = fs.NodeRemovexattrer(&File{})
var _ = fs.NodeListxattrer(&File{})
var _ = fs.NodeForgetter(&File{})
type File struct {
Name string
dir *Dir
wfs *WFS
entry *filer_pb.Entry
entryViewCache []filer.VisibleInterval
isOpen int
reader io.ReaderAt
dirtyMetadata bool
}
func (file *File) fullpath() util.FullPath {
return util.NewFullPath(file.dir.FullPath(), file.Name)
}
func (file *File) Attr(ctx context.Context, attr *fuse.Attr) (err error) {
log.Tracef("file Attr %s, open:%v, existing attr: %+v", file.fullpath(), file.isOpen, attr)
entry := file.entry
if file.isOpen <= 0 || entry == nil {
if entry, err = file.maybeLoadEntry(ctx); err != nil {
return err
}
}
attr.Inode = file.fullpath().AsInode()
attr.Valid = time.Second
attr.Mode = os.FileMode(entry.Attributes.FileMode)
attr.Size = filer.FileSize(entry)
if file.isOpen > 0 {
attr.Size = entry.Attributes.FileSize
log.Tracef("file Attr %s, open:%v, size: %d", file.fullpath(), file.isOpen, attr.Size)
}
attr.Crtime = time.Unix(entry.Attributes.Crtime, 0)
attr.Mtime = time.Unix(entry.Attributes.Mtime, 0)
attr.Gid = entry.Attributes.Gid
attr.Uid = entry.Attributes.Uid
attr.Blocks = attr.Size/blockSize + 1
attr.BlockSize = uint32(file.wfs.option.ChunkSizeLimit)
if entry.HardLinkCounter > 0 {
attr.Nlink = uint32(entry.HardLinkCounter)
}
return nil
}
func (file *File) Getxattr(ctx context.Context, req *fuse.GetxattrRequest, resp *fuse.GetxattrResponse) error {
log.Tracef("file Getxattr %s", file.fullpath())
entry, err := file.maybeLoadEntry(ctx)
if err != nil {
return err
}
return getxattr(entry, req, resp)
}
func (file *File) Open(ctx context.Context, req *fuse.OpenRequest, resp *fuse.OpenResponse) (fs.Handle, error) {
log.Tracef("file %v open %+v", file.fullpath(), req)
handle := file.wfs.AcquireHandle(file, req.Uid, req.Gid)
resp.Handle = fuse.HandleID(handle.handle)
log.Tracef("%v file open handle id = %d", file.fullpath(), handle.handle)
return handle, nil
}
func (file *File) Setattr(ctx context.Context, req *fuse.SetattrRequest, resp *fuse.SetattrResponse) error {
log.Tracef("%v file setattr %+v", file.fullpath(), req)
_, err := file.maybeLoadEntry(ctx)
if err != nil {
return err
}
if file.isOpen > 0 {
file.wfs.handlesLock.Lock()
fileHandle := file.wfs.handles[file.fullpath().AsInode()]
file.wfs.handlesLock.Unlock()
if fileHandle != nil {
fileHandle.Lock()
defer fileHandle.Unlock()
}
}
if req.Valid.Size() {
log.Tracef("%v file setattr set size=%v chunks=%d", file.fullpath(), req.Size, len(file.entry.Chunks))
if req.Size < filer.FileSize(file.entry) {
// fmt.Printf("truncate %v \n", fullPath)
var chunks []*filer_pb.FileChunk
var truncatedChunks []*filer_pb.FileChunk
for _, chunk := range file.entry.Chunks {
int64Size := int64(chunk.Size)
if chunk.Offset+int64Size > int64(req.Size) {
// this chunk is truncated
int64Size = int64(req.Size) - chunk.Offset
if int64Size > 0 {
chunks = append(chunks, chunk)
log.Tracef("truncated chunk %+v from %d to %d\n", chunk.GetFileIdString(), chunk.Size, int64Size)
chunk.Size = uint64(int64Size)
} else {
log.Tracef("truncated whole chunk %+v\n", chunk.GetFileIdString())
truncatedChunks = append(truncatedChunks, chunk)
}
}
}
file.entry.Chunks = chunks
file.entryViewCache, _ = filer.NonOverlappingVisibleIntervals(filer.LookupFn(file.wfs), chunks)
file.reader = nil
file.wfs.deleteFileChunks(truncatedChunks)
}
file.entry.Attributes.FileSize = req.Size
file.dirtyMetadata = true
}
if req.Valid.Mode() {
file.entry.Attributes.FileMode = uint32(req.Mode)
file.dirtyMetadata = true
}
if req.Valid.Uid() {
file.entry.Attributes.Uid = req.Uid
file.dirtyMetadata = true
}
if req.Valid.Gid() {
file.entry.Attributes.Gid = req.Gid
file.dirtyMetadata = true
}
if req.Valid.Crtime() {
file.entry.Attributes.Crtime = req.Crtime.Unix()
file.dirtyMetadata = true
}
if req.Valid.Mtime() {
file.entry.Attributes.Mtime = req.Mtime.Unix()
file.dirtyMetadata = true
}
if req.Valid.Handle() {
// fmt.Printf("file handle => %d\n", req.Handle)
}
if file.isOpen > 0 {
return nil
}
if !file.dirtyMetadata {
return nil
}
return file.saveEntry(file.entry)
}
func (file *File) Setxattr(ctx context.Context, req *fuse.SetxattrRequest) error {
log.Tracef("file Setxattr %s: %s", file.fullpath(), req.Name)
entry, err := file.maybeLoadEntry(ctx)
if err != nil {
return err
}
if err := setxattr(entry, req); err != nil {
return err
}
return file.saveEntry(entry)
}
func (file *File) Removexattr(ctx context.Context, req *fuse.RemovexattrRequest) error {
log.Tracef("file Removexattr %s: %s", file.fullpath(), req.Name)
entry, err := file.maybeLoadEntry(ctx)
if err != nil {
return err
}
if err := removexattr(entry, req); err != nil {
return err
}
return file.saveEntry(entry)
}
func (file *File) Listxattr(ctx context.Context, req *fuse.ListxattrRequest, resp *fuse.ListxattrResponse) error {
log.Tracef("file Listxattr %s", file.fullpath())
entry, err := file.maybeLoadEntry(ctx)
if err != nil {
return err
}
if err := listxattr(entry, req, resp); err != nil {
return err
}
return nil
}
func (file *File) Fsync(ctx context.Context, req *fuse.FsyncRequest) error {
// fsync works at OS level
// write the file chunks to the filerGrpcAddress
log.Tracef("%s/%s fsync file %+v", file.dir.FullPath(), file.Name, req)
return nil
}
func (file *File) Forget() {
t := util.NewFullPath(file.dir.FullPath(), file.Name)
log.Tracef("Forget file %s", t)
file.wfs.fsNodeCache.DeleteFsNode(t)
}
func (file *File) maybeLoadEntry(ctx context.Context) (entry *filer_pb.Entry, err error) {
entry = file.entry
if file.isOpen > 0 {
return entry, nil
}
if entry != nil {
if len(entry.HardLinkId) == 0 {
// only always reload hard link
return entry, nil
}
}
entry, err = file.wfs.maybeLoadEntry(file.dir.FullPath(), file.Name)
if err != nil {
log.Tracef("maybeLoadEntry file %s/%s: %v", file.dir.FullPath(), file.Name, err)
return entry, err
}
if entry != nil {
file.setEntry(entry)
} else {
log.Warnf("maybeLoadEntry not found entry %s/%s: %v", file.dir.FullPath(), file.Name, err)
}
return entry, nil
}
func lessThan(a, b *filer_pb.FileChunk) bool {
if a.Mtime == b.Mtime {
return a.Fid.FileKey < b.Fid.FileKey
}
return a.Mtime < b.Mtime
}
func (file *File) addChunks(chunks []*filer_pb.FileChunk) {
// find the earliest incoming chunk
newChunks := chunks
earliestChunk := newChunks[0]
for i := 1; i < len(newChunks); i++ {
if lessThan(earliestChunk, newChunks[i]) {
earliestChunk = newChunks[i]
}
}
// pick out-of-order chunks from existing chunks
for _, chunk := range file.entry.Chunks {
if lessThan(earliestChunk, chunk) {
chunks = append(chunks, chunk)
}
}
// sort incoming chunks
sort.Slice(chunks, func(i, j int) bool {
return lessThan(chunks[i], chunks[j])
})
// add to entry view cache
for _, chunk := range chunks {
file.entryViewCache = filer.MergeIntoVisibles(file.entryViewCache, chunk)
}
file.reader = nil
log.Tracef("%s existing %d chunks adds %d more", file.fullpath(), len(file.entry.Chunks), len(chunks))
file.entry.Chunks = append(file.entry.Chunks, newChunks...)
}
func (file *File) setEntry(entry *filer_pb.Entry) {
file.entry = entry
file.entryViewCache, _ = filer.NonOverlappingVisibleIntervals(filer.LookupFn(file.wfs), entry.Chunks)
file.reader = nil
}
func (file *File) clearEntry() {
file.entry = nil
file.entryViewCache = nil
file.reader = nil
}
func (file *File) saveEntry(entry *filer_pb.Entry) error {
return file.wfs.WithFilerClient(func(client filer_pb.SeaweedFilerClient) error {
file.wfs.mapPbIdFromLocalToFiler(entry)
defer file.wfs.mapPbIdFromFilerToLocal(entry)
request := &filer_pb.UpdateEntryRequest{
Directory: file.dir.FullPath(),
Entry: entry,
Signatures: []int32{file.wfs.signature},
}
log.Tracef("save file entry: %v", request)
_, err := client.UpdateEntry(context.Background(), request)
if err != nil {
log.Errorf("UpdateEntry file %s/%s: %v", file.dir.FullPath(), file.Name, err)
return fuse.EIO
}
file.wfs.metaCache.UpdateEntry(context.Background(), filer.FromPbEntry(request.Directory, request.Entry))
return nil
})
}
|
