mirror of
https://github.com/seaweedfs/seaweedfs.git
synced 2024-11-24 11:09:12 +08:00
123 lines
2.7 KiB
Go
123 lines
2.7 KiB
Go
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
|
|
|
|
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() {
|
|
|
|
fhActiveLock := fh.wfs.fhLockTable.AcquireLock("ReleaseHandle", fh.fh, util.ExclusiveLock)
|
|
defer fh.wfs.fhLockTable.ReleaseLock(fh.fh, fhActiveLock)
|
|
|
|
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
|
|
}
|