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131 lines
2.9 KiB
131 lines
2.9 KiB
package mount
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import (
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"golang.org/x/sync/semaphore"
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"math"
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"sync"
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"golang.org/x/exp/slices"
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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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)
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type FileHandleId uint64
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type FileHandle struct {
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fh FileHandleId
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counter int64
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entry *filer_pb.Entry
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entryLock sync.Mutex
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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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entryViewCache []filer.VisibleInterval
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reader *filer.ChunkReadAt
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contentType string
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handle uint64
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orderedMutex *semaphore.Weighted
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isDeleted bool
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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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orderedMutex: semaphore.NewWeighted(int64(math.MaxInt64)),
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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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if entry != nil {
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entry.Attributes.FileSize = filer.FileSize(entry)
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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() *filer_pb.Entry {
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fh.entryLock.Lock()
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defer fh.entryLock.Unlock()
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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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fh.entryLock.Lock()
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defer fh.entryLock.Unlock()
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fh.entry = 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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fh.entryLock.Lock()
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defer fh.entryLock.Unlock()
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fn(fh.entry)
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return fh.entry
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}
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func (fh *FileHandle) AddChunks(chunks []*filer_pb.FileChunk) {
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fh.entryLock.Lock()
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defer fh.entryLock.Unlock()
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if fh.entry == nil {
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return
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}
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// find the earliest incoming chunk
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newChunks := chunks
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earliestChunk := newChunks[0]
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for i := 1; i < len(newChunks); i++ {
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if lessThan(earliestChunk, newChunks[i]) {
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earliestChunk = newChunks[i]
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}
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}
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// pick out-of-order chunks from existing chunks
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for _, chunk := range fh.entry.Chunks {
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if lessThan(earliestChunk, chunk) {
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chunks = append(chunks, chunk)
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}
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}
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// sort incoming chunks
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slices.SortFunc(chunks, func(a, b *filer_pb.FileChunk) bool {
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return lessThan(a, b)
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})
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glog.V(4).Infof("%s existing %d chunks adds %d more", fh.FullPath(), len(fh.entry.Chunks), len(chunks))
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fh.entry.Chunks = append(fh.entry.Chunks, newChunks...)
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fh.entryViewCache = nil
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}
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func (fh *FileHandle) CloseReader() {
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if fh.reader != nil {
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_ = fh.reader.Close()
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fh.reader = nil
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}
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}
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func (fh *FileHandle) Release() {
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fh.dirtyPages.Destroy()
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fh.CloseReader()
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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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