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|
package mount
import (
"sync"
"github.com/seaweedfs/seaweedfs/weed/util"
"github.com/seaweedfs/seaweedfs/weed/pb/filer_pb"
)
type FileHandleToInode struct {
sync.RWMutex
inode2fh map[uint64]*FileHandle
fh2inode map[FileHandleId]uint64
}
func NewFileHandleToInode() *FileHandleToInode {
return &FileHandleToInode{
inode2fh: make(map[uint64]*FileHandle),
fh2inode: make(map[FileHandleId]uint64),
}
}
func (i *FileHandleToInode) GetFileHandle(fh FileHandleId) *FileHandle {
i.RLock()
defer i.RUnlock()
inode, found := i.fh2inode[fh]
if found {
return i.inode2fh[inode]
}
return nil
}
func (i *FileHandleToInode) FindFileHandle(inode uint64) (fh *FileHandle, found bool) {
i.RLock()
defer i.RUnlock()
fh, found = i.inode2fh[inode]
return
}
func (i *FileHandleToInode) AcquireFileHandle(wfs *WFS, inode uint64, entry *filer_pb.Entry) *FileHandle {
i.Lock()
defer i.Unlock()
fh, found := i.inode2fh[inode]
if !found {
fh = newFileHandle(wfs, FileHandleId(util.RandomUint64()), inode, entry)
i.inode2fh[inode] = fh
i.fh2inode[fh.fh] = inode
} else {
fh.counter++
}
if fh.GetEntry().GetEntry() != entry {
fh.SetEntry(entry)
}
return fh
}
func (i *FileHandleToInode) ReleaseByInode(inode uint64) {
i.Lock()
defer i.Unlock()
fh, found := i.inode2fh[inode]
if found {
fh.counter--
if fh.counter <= 0 {
delete(i.inode2fh, inode)
delete(i.fh2inode, fh.fh)
fh.ReleaseHandle()
}
}
}
func (i *FileHandleToInode) ReleaseByHandle(fh FileHandleId) {
i.Lock()
defer i.Unlock()
inode, found := i.fh2inode[fh]
if !found {
return // Handle already released or invalid
}
fhHandle, fhFound := i.inode2fh[inode]
if !fhFound {
delete(i.fh2inode, fh)
return
}
fhHandle.counter--
if fhHandle.counter <= 0 {
delete(i.inode2fh, inode)
delete(i.fh2inode, fhHandle.fh)
fhHandle.ReleaseHandle()
}
}
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