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package mount
import (
"github.com/seaweedfs/seaweedfs/weed/filer"
"github.com/seaweedfs/seaweedfs/weed/glog"
"github.com/seaweedfs/seaweedfs/weed/pb/filer_pb"
"github.com/seaweedfs/seaweedfs/weed/util"
"os"
"sync"
)
type FileHandleId uint64
var IsDebugFileReadWrite = false
type FileHandle struct {
fh FileHandleId
counter int64
entry *LockedEntry
entryLock sync.RWMutex
entryChunkGroup *filer.ChunkGroup
inode uint64
wfs *WFS
// cache file has been written to
dirtyMetadata bool
dirtyPages *PageWriter
reader *filer.ChunkReadAt
contentType string
sync.RWMutex
isDeleted bool
// for debugging
mirrorFile *os.File
}
func newFileHandle(wfs *WFS, handleId FileHandleId, inode uint64, entry *filer_pb.Entry) *FileHandle {
fh := &FileHandle{
fh: handleId,
counter: 1,
inode: inode,
wfs: wfs,
}
// dirtyPages: newContinuousDirtyPages(file, writeOnly),
fh.dirtyPages = newPageWriter(fh, wfs.option.ChunkSizeLimit)
fh.entry = &LockedEntry{
Entry: entry,
}
if entry != nil {
fh.SetEntry(entry)
}
if IsDebugFileReadWrite {
var err error
fh.mirrorFile, err = os.OpenFile("/tmp/sw/"+entry.Name, os.O_RDWR|os.O_CREATE, 0600)
if err != nil {
println("failed to create mirror:", err.Error())
}
}
return fh
}
func (fh *FileHandle) FullPath() util.FullPath {
fp, _ := fh.wfs.inodeToPath.GetPath(fh.inode)
return fp
}
func (fh *FileHandle) GetEntry() *filer_pb.Entry {
return fh.entry.GetEntry()
}
func (fh *FileHandle) SetEntry(entry *filer_pb.Entry) {
if entry != nil {
fileSize := filer.FileSize(entry)
entry.Attributes.FileSize = fileSize
var resolveManifestErr error
fh.entryChunkGroup, resolveManifestErr = filer.NewChunkGroup(fh.wfs.LookupFn(), fh.wfs.chunkCache, entry.Chunks)
if resolveManifestErr != nil {
glog.Warningf("failed to resolve manifest chunks in %+v", entry)
}
} else {
glog.Fatalf("setting file handle entry to nil")
}
fh.entry.SetEntry(entry)
}
func (fh *FileHandle) UpdateEntry(fn func(entry *filer_pb.Entry)) *filer_pb.Entry {
return fh.entry.UpdateEntry(fn)
}
func (fh *FileHandle) AddChunks(chunks []*filer_pb.FileChunk) {
fh.entryLock.Lock()
defer fh.entryLock.Unlock()
if fh.entry == nil {
return
}
fh.entry.AppendChunks(chunks)
}
func (fh *FileHandle) ReleaseHandle() {
fh.Lock()
defer fh.Unlock()
fh.entryLock.Lock()
defer fh.entryLock.Unlock()
fh.dirtyPages.Destroy()
if IsDebugFileReadWrite {
fh.mirrorFile.Close()
}
}
func lessThan(a, b *filer_pb.FileChunk) bool {
if a.ModifiedTsNs == b.ModifiedTsNs {
return a.Fid.FileKey < b.Fid.FileKey
}
return a.ModifiedTsNs < b.ModifiedTsNs
}
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