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