seaweedfs/weed/mount/filehandle_map.go
Chris Lu d4566d4aaa
more solid weed mount (#4089)
* compare chunks by timestamp

* fix slab clearing error

* fix test compilation

* move oldest chunk to sealed, instead of by fullness

* lock on fh.entryViewCache

* remove verbose logs

* revert slat clearing

* less logs

* less logs

* track write and read by timestamp

* remove useless logic

* add entry lock on file handle release

* use mem chunk only, swap file chunk has problems

* comment out code that maybe used later

* add debug mode to compare data read and write

* more efficient readResolvedChunks with linked list

* small optimization

* fix test compilation

* minor fix on writer

* add SeparateGarbageChunks

* group chunks into sections

* turn off debug mode

* fix tests

* fix tests

* tmp enable swap file chunk

* Revert "tmp enable swap file chunk"

This reverts commit 985137ec47.

* simple refactoring

* simple refactoring

* do not re-use swap file chunk. Sealed chunks should not be re-used.

* comment out debugging facilities

* either mem chunk or swap file chunk is fine now

* remove orderedMutex  as *semaphore.Weighted

not found impactful

* optimize size calculation for changing large files

* optimize performance to avoid going through the long list of chunks

* still problems with swap file chunk

* rename

* tiny optimization

* swap file chunk save only successfully read data

* fix

* enable both mem and swap file chunk

* resolve chunks with range

* rename

* fix chunk interval list

* also change file handle chunk group when adding chunks

* pick in-active chunk with time-decayed counter

* fix compilation

* avoid nil with empty fh.entry

* refactoring

* rename

* rename

* refactor visible intervals to *list.List

* refactor chunkViews to *list.List

* add IntervalList for generic interval list

* change visible interval to use IntervalList in generics

* cahnge chunkViews to *IntervalList[*ChunkView]

* use NewFileChunkSection to create

* rename variables

* refactor

* fix renaming leftover

* renaming

* renaming

* add insert interval

* interval list adds lock

* incrementally add chunks to readers

Fixes:
1. set start and stop offset for the value object
2. clone the value object
3. use pointer instead of copy-by-value when passing to interval.Value
4. use insert interval since adding chunk could be out of order

* fix tests compilation

* fix tests compilation
2023-01-02 23:20:45 -08:00

91 lines
1.8 KiB
Go

package mount
import (
"sync"
"github.com/seaweedfs/seaweedfs/weed/pb/filer_pb"
)
type FileHandleToInode struct {
sync.RWMutex
nextFh FileHandleId
inode2fh map[uint64]*FileHandle
fh2inode map[FileHandleId]uint64
}
func NewFileHandleToInode() *FileHandleToInode {
return &FileHandleToInode{
inode2fh: make(map[uint64]*FileHandle),
fh2inode: make(map[FileHandleId]uint64),
nextFh: 0,
}
}
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, i.nextFh, inode, entry)
i.nextFh++
i.inode2fh[inode] = fh
i.fh2inode[fh.fh] = inode
} else {
fh.counter++
}
if fh.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 {
fhHandle, fhFound := i.inode2fh[inode]
if !fhFound {
delete(i.fh2inode, fh)
} else {
fhHandle.counter--
if fhHandle.counter <= 0 {
delete(i.inode2fh, inode)
delete(i.fh2inode, fhHandle.fh)
fhHandle.ReleaseHandle()
}
}
}
}