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  1. package filesys
  2. import (
  3. "context"
  4. "fmt"
  5. "math"
  6. "os"
  7. "path"
  8. "sync"
  9. "time"
  10. "google.golang.org/grpc"
  11. "github.com/chrislusf/seaweedfs/weed/util/grace"
  12. "github.com/seaweedfs/fuse"
  13. "github.com/seaweedfs/fuse/fs"
  14. "github.com/chrislusf/seaweedfs/weed/filesys/meta_cache"
  15. "github.com/chrislusf/seaweedfs/weed/glog"
  16. "github.com/chrislusf/seaweedfs/weed/pb/filer_pb"
  17. "github.com/chrislusf/seaweedfs/weed/util"
  18. "github.com/chrislusf/seaweedfs/weed/util/chunk_cache"
  19. )
  20. type Option struct {
  21. FilerGrpcAddress string
  22. GrpcDialOption grpc.DialOption
  23. FilerMountRootPath string
  24. Collection string
  25. Replication string
  26. TtlSec int32
  27. ChunkSizeLimit int64
  28. CacheDir string
  29. CacheSizeMB int64
  30. DataCenter string
  31. EntryCacheTtl time.Duration
  32. Umask os.FileMode
  33. MountUid uint32
  34. MountGid uint32
  35. MountMode os.FileMode
  36. MountCtime time.Time
  37. MountMtime time.Time
  38. OutsideContainerClusterMode bool // whether the mount runs outside SeaweedFS containers
  39. Cipher bool // whether encrypt data on volume server
  40. UidGidMapper *meta_cache.UidGidMapper
  41. }
  42. var _ = fs.FS(&WFS{})
  43. var _ = fs.FSStatfser(&WFS{})
  44. type WFS struct {
  45. option *Option
  46. // contains all open handles, protected by handlesLock
  47. handlesLock sync.Mutex
  48. handles map[uint64]*FileHandle
  49. bufPool sync.Pool
  50. stats statsCache
  51. root fs.Node
  52. fsNodeCache *FsCache
  53. chunkCache *chunk_cache.TieredChunkCache
  54. metaCache *meta_cache.MetaCache
  55. signature int32
  56. }
  57. type statsCache struct {
  58. filer_pb.StatisticsResponse
  59. lastChecked int64 // unix time in seconds
  60. }
  61. func NewSeaweedFileSystem(option *Option) *WFS {
  62. wfs := &WFS{
  63. option: option,
  64. handles: make(map[uint64]*FileHandle),
  65. bufPool: sync.Pool{
  66. New: func() interface{} {
  67. return make([]byte, option.ChunkSizeLimit)
  68. },
  69. },
  70. signature: util.RandomInt32(),
  71. }
  72. cacheUniqueId := util.Md5String([]byte(option.FilerGrpcAddress + option.FilerMountRootPath + util.Version()))[0:4]
  73. cacheDir := path.Join(option.CacheDir, cacheUniqueId)
  74. if option.CacheSizeMB > 0 {
  75. os.MkdirAll(cacheDir, os.FileMode(0777) &^ option.Umask)
  76. wfs.chunkCache = chunk_cache.NewTieredChunkCache(256, cacheDir, option.CacheSizeMB)
  77. }
  78. wfs.metaCache = meta_cache.NewMetaCache(path.Join(cacheDir, "meta"), option.UidGidMapper)
  79. startTime := time.Now()
  80. go meta_cache.SubscribeMetaEvents(wfs.metaCache, wfs.signature, wfs, wfs.option.FilerMountRootPath, startTime.UnixNano())
  81. grace.OnInterrupt(func() {
  82. wfs.metaCache.Shutdown()
  83. })
  84. wfs.root = &Dir{name: wfs.option.FilerMountRootPath, wfs: wfs}
  85. wfs.fsNodeCache = newFsCache(wfs.root)
  86. return wfs
  87. }
  88. func (wfs *WFS) Root() (fs.Node, error) {
  89. return wfs.root, nil
  90. }
  91. func (wfs *WFS) AcquireHandle(file *File, uid, gid uint32) (fileHandle *FileHandle) {
  92. fullpath := file.fullpath()
  93. glog.V(4).Infof("AcquireHandle %s uid=%d gid=%d", fullpath, uid, gid)
  94. wfs.handlesLock.Lock()
  95. defer wfs.handlesLock.Unlock()
  96. inodeId := file.fullpath().AsInode()
  97. existingHandle, found := wfs.handles[inodeId]
  98. if found && existingHandle != nil {
  99. file.isOpen++
  100. return existingHandle
  101. }
  102. fileHandle = newFileHandle(file, uid, gid)
  103. file.maybeLoadEntry(context.Background())
  104. file.isOpen++
  105. wfs.handles[inodeId] = fileHandle
  106. fileHandle.handle = inodeId
  107. return
  108. }
  109. func (wfs *WFS) ReleaseHandle(fullpath util.FullPath, handleId fuse.HandleID) {
  110. wfs.handlesLock.Lock()
  111. defer wfs.handlesLock.Unlock()
  112. glog.V(4).Infof("%s ReleaseHandle id %d current handles length %d", fullpath, handleId, len(wfs.handles))
  113. delete(wfs.handles, fullpath.AsInode())
  114. return
  115. }
  116. // Statfs is called to obtain file system metadata. Implements fuse.FSStatfser
  117. func (wfs *WFS) Statfs(ctx context.Context, req *fuse.StatfsRequest, resp *fuse.StatfsResponse) error {
  118. glog.V(4).Infof("reading fs stats: %+v", req)
  119. if wfs.stats.lastChecked < time.Now().Unix()-20 {
  120. err := wfs.WithFilerClient(func(client filer_pb.SeaweedFilerClient) error {
  121. request := &filer_pb.StatisticsRequest{
  122. Collection: wfs.option.Collection,
  123. Replication: wfs.option.Replication,
  124. Ttl: fmt.Sprintf("%ds", wfs.option.TtlSec),
  125. }
  126. glog.V(4).Infof("reading filer stats: %+v", request)
  127. resp, err := client.Statistics(context.Background(), request)
  128. if err != nil {
  129. glog.V(0).Infof("reading filer stats %v: %v", request, err)
  130. return err
  131. }
  132. glog.V(4).Infof("read filer stats: %+v", resp)
  133. wfs.stats.TotalSize = resp.TotalSize
  134. wfs.stats.UsedSize = resp.UsedSize
  135. wfs.stats.FileCount = resp.FileCount
  136. wfs.stats.lastChecked = time.Now().Unix()
  137. return nil
  138. })
  139. if err != nil {
  140. glog.V(0).Infof("filer Statistics: %v", err)
  141. return err
  142. }
  143. }
  144. totalDiskSize := wfs.stats.TotalSize
  145. usedDiskSize := wfs.stats.UsedSize
  146. actualFileCount := wfs.stats.FileCount
  147. // Compute the total number of available blocks
  148. resp.Blocks = totalDiskSize / blockSize
  149. // Compute the number of used blocks
  150. numBlocks := uint64(usedDiskSize / blockSize)
  151. // Report the number of free and available blocks for the block size
  152. resp.Bfree = resp.Blocks - numBlocks
  153. resp.Bavail = resp.Blocks - numBlocks
  154. resp.Bsize = uint32(blockSize)
  155. // Report the total number of possible files in the file system (and those free)
  156. resp.Files = math.MaxInt64
  157. resp.Ffree = math.MaxInt64 - actualFileCount
  158. // Report the maximum length of a name and the minimum fragment size
  159. resp.Namelen = 1024
  160. resp.Frsize = uint32(blockSize)
  161. return nil
  162. }
  163. func (wfs *WFS) mapPbIdFromFilerToLocal(entry *filer_pb.Entry) {
  164. entry.Attributes.Uid, entry.Attributes.Gid = wfs.option.UidGidMapper.FilerToLocal(entry.Attributes.Uid, entry.Attributes.Gid)
  165. }
  166. func (wfs *WFS) mapPbIdFromLocalToFiler(entry *filer_pb.Entry) {
  167. entry.Attributes.Uid, entry.Attributes.Gid = wfs.option.UidGidMapper.LocalToFiler(entry.Attributes.Uid, entry.Attributes.Gid)
  168. }