Documentation ¶
Overview ¶
nolint
Index ¶
- Constants
- Variables
- func Register(name string, register Creator)
- type Attr
- type Config
- type Context
- type Creator
- type CtxKey
- type DumpedAttr
- type DumpedChunk
- type DumpedCounters
- type DumpedDelFile
- type DumpedEntry
- type DumpedMeta
- type DumpedQuota
- type DumpedSlice
- type DumpedSustained
- type DumpedXattr
- type Entry
- type FLockItem
- type Flock
- type Format
- type Ino
- type Meta
- type MsgCallback
- type PLockItem
- type Plock
- type Quota
- type Session
- type SessionInfo
- type Slice
- type Summary
- type TreeSummary
Constants ¶
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const ( // MaxVersion is the max of supported versions. MaxVersion = 1 // ChunkSize is size of a chunk ChunkSize = 1 << 26 // 64M // DeleteSlice is a message to delete a slice from object store. DeleteSlice = 1000 // CompactChunk is a message to compact a chunk in object store. CompactChunk = 1001 // Rmr is a message to remove a directory recursively. Rmr = 1002 // LegacyInfo is a message to get the internal info for file or directory. LegacyInfo = 1003 // FillCache is a message to build cache for target directories/files FillCache = 1004 // InfoV2 is a message to get the internal info for file or directory. InfoV2 = 1005 // Clone is a message to clone a file or dir from another. Clone = 1006 // OpSummary is a message to get tree summary of directories. OpSummary = 1007 )
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const ( TypeFile = 1 // type for regular file TypeDirectory = 2 // type for directory TypeSymlink = 3 // type for symlink TypeFIFO = 4 // type for FIFO node TypeBlockDev = 5 // type for block device TypeCharDev = 6 // type for character device TypeSocket = 7 // type for socket )
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const ( RenameNoReplace = 1 << iota RenameExchange RenameWhiteout RenameRestore // internal )
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const ( // SetAttrMode is a mask to update a attribute of node SetAttrMode = 1 << iota SetAttrUID SetAttrGID SetAttrSize SetAttrAtime SetAttrMtime SetAttrCtime SetAttrAtimeNow SetAttrMtimeNow SetAttrFlag = 1 << 15 )
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const ( FlagImmutable = 1 << iota FlagAppend )
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const ( QuotaSet uint8 = iota QuotaGet QuotaDel QuotaList QuotaCheck )
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const ( // clone mode CLONE_MODE_CAN_OVERWRITE = 0x01 CLONE_MODE_PRESERVE_ATTR = 0x02 CLONE_MODE_PRESERVE_HARDLINKS = 0x08 // atime mode NoAtime = "noatime" RelAtime = "relatime" StrictAtime = "strictatime" )
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const ( MODE_MASK_R = 0b100 MODE_MASK_W = 0b010 MODE_MASK_X = 0b001 )
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const ( XattrCreateOrReplace = 0 XattrCreate = sys.XATTR_CREATE XattrReplace = sys.XATTR_REPLACE )
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const CDATA = 0xFF // 4 bytes: data length
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const CPROGRESS = 0xFE // 16 bytes: progress increment
Type of control messages
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const ENOATTR = syscall.ENODATA
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const MaxFieldsCountOfTable = 16 // node table
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const MaxName = 255
Variables ¶
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var CHARS = []byte("0123456789ABCDEF")
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var TrashName = ".trash"
Functions ¶
Types ¶
type Attr ¶
type Attr struct { Flags uint8 // flags Typ uint8 // type of a node Mode uint16 // permission mode Uid uint32 // owner id Gid uint32 // group id of owner Rdev uint32 // device number Atime int64 // last access time Mtime int64 // last modified time Ctime int64 // last change time for meta Atimensec uint32 // nanosecond part of atime Mtimensec uint32 // nanosecond part of mtime Ctimensec uint32 // nanosecond part of ctime Nlink uint32 // number of links (sub-directories or hardlinks) Length uint64 // length of regular file Parent Ino // inode of parent; 0 means tracked by parentKey (for hardlinks) Full bool // the attributes are completed or not KeepCache bool // whether to keep the cached page or not }
Attr represents attributes of a node.
type Config ¶
type Config struct { Strict bool // update ctime Retries int MaxDeletes int SkipDirNlink int CaseInsensi bool ReadOnly bool NoBGJob bool // disable background jobs like clean-up, backup, etc. OpenCache time.Duration OpenCacheLimit uint64 // max number of files to cache (soft limit) Heartbeat time.Duration MountPoint string Subdir string AtimeMode string DirStatFlushPeriod time.Duration }
Config for clients.
func DefaultConf ¶
func DefaultConf() *Config
type Context ¶
type Context interface { context.Context Gid() uint32 Gids() []uint32 Uid() uint32 Pid() uint32 WithValue(k, v interface{}) Cancel() Canceled() bool CheckPermission() bool }
var Background Context = WrapContext(context.Background())
func NewContext ¶
func WrapContext ¶
type DumpedAttr ¶
type DumpedAttr struct { Inode Ino `json:"inode"` Flags uint8 `json:"flags,omitempty"` Type string `json:"type"` Mode uint16 `json:"mode"` Uid uint32 `json:"uid"` Gid uint32 `json:"gid"` Atime int64 `json:"atime"` Mtime int64 `json:"mtime"` Ctime int64 `json:"ctime"` Atimensec uint32 `json:"atimensec,omitempty"` Mtimensec uint32 `json:"mtimensec,omitempty"` Ctimensec uint32 `json:"ctimensec,omitempty"` Nlink uint32 `json:"nlink"` Length uint64 `json:"length"` Rdev uint32 `json:"rdev,omitempty"` // contains filtered or unexported fields }
type DumpedChunk ¶
type DumpedChunk struct { Index uint32 `json:"index"` Slices []*DumpedSlice `json:"slices"` }
type DumpedCounters ¶
type DumpedCounters struct { UsedSpace int64 `json:"usedSpace"` UsedInodes int64 `json:"usedInodes"` NextInode int64 `json:"nextInodes"` NextChunk int64 `json:"nextChunk"` NextSession int64 `json:"nextSession"` NextTrash int64 `json:"nextTrash"` NextCleanupSlices int64 `json:"nextCleanupSlices,omitempty"` // deprecated, always 0 }
type DumpedDelFile ¶
type DumpedEntry ¶
type DumpedEntry struct { Name string `json:"-"` Parents []Ino `json:"-"` Attr *DumpedAttr `json:"attr,omitempty"` Symlink string `json:"symlink,omitempty"` Xattrs []*DumpedXattr `json:"xattrs,omitempty"` Chunks []*DumpedChunk `json:"chunks,omitempty"` Entries map[string]*DumpedEntry `json:"entries,omitempty"` }
type DumpedMeta ¶
type DumpedMeta struct { Setting Format Counters *DumpedCounters Sustained []*DumpedSustained DelFiles []*DumpedDelFile Quotas map[Ino]*DumpedQuota `json:",omitempty"` FSTree *DumpedEntry `json:",omitempty"` Trash *DumpedEntry `json:",omitempty"` }
type DumpedQuota ¶
type DumpedSlice ¶
type DumpedSustained ¶
type DumpedXattr ¶
type Format ¶
type Format struct { Name string UUID string Storage string StorageClass string `json:",omitempty"` Bucket string AccessKey string `json:",omitempty"` SecretKey string `json:",omitempty"` SessionToken string `json:",omitempty"` BlockSize int Compression string `json:",omitempty"` Shards int `json:",omitempty"` HashPrefix bool `json:",omitempty"` Capacity uint64 `json:",omitempty"` Inodes uint64 `json:",omitempty"` EncryptKey string `json:",omitempty"` EncryptAlgo string `json:",omitempty"` KeyEncrypted bool `json:",omitempty"` UploadLimit int64 `json:",omitempty"` // Mbps DownloadLimit int64 `json:",omitempty"` // Mbps TrashDays int MetaVersion int `json:",omitempty"` MinClientVersion string `json:",omitempty"` MaxClientVersion string `json:",omitempty"` DirStats bool `json:",omitempty"` }
func (*Format) CheckVersion ¶
func (*Format) RemoveSecret ¶
func (f *Format) RemoveSecret()
type Ino ¶
type Ino uint64
const RootInode Ino = 1
const TrashInode Ino = 0x7FFFFFFF10000000 // larger than vfs.minInternalNode
type Meta ¶
type Meta interface { // Name of database Name() string // Init is used to initialize a meta service. Init(format *Format, force bool) error // Shutdown close current database connections. Shutdown() error // Reset cleans up all metadata, VERY DANGEROUS! Reset() error // Load loads the existing setting of a formatted volume from meta service. Load(checkVersion bool) (*Format, error) // NewSession creates a new client session. NewSession(record bool) error // CloseSession does cleanup and close the session. CloseSession() error // GetSession retrieves information of session with sid GetSession(sid uint64, detail bool) (*Session, error) // ListSessions returns all client sessions. ListSessions() ([]*Session, error) // ScanDeletedObject scan deleted objects by customized scanner. ScanDeletedObject(Context, trashSliceScan, pendingSliceScan, trashFileScan, pendingFileScan) error // ListLocks returns all locks of a inode. ListLocks(ctx context.Context, inode Ino) ([]PLockItem, []FLockItem, error) // CleanStaleSessions cleans up sessions not active for more than 5 minutes CleanStaleSessions() // CleanupTrashBefore deletes all files in trash before the given time. CleanupTrashBefore(ctx Context, edge time.Time, increProgress func(int)) // CleanupDetachedNodesBefore deletes all detached nodes before the given time. CleanupDetachedNodesBefore(ctx Context, edge time.Time, increProgress func()) // StatFS returns summary statistics of a volume. StatFS(ctx Context, ino Ino, totalspace, availspace, iused, iavail *uint64) syscall.Errno // Access checks the access permission on given inode. Access(ctx Context, inode Ino, modemask uint8, attr *Attr) syscall.Errno // Lookup returns the inode and attributes for the given entry in a directory. Lookup(ctx Context, parent Ino, name string, inode *Ino, attr *Attr, checkPerm bool) syscall.Errno // Resolve fetches the inode and attributes for an entry identified by the given path. // ENOTSUP will be returned if there's no natural implementation for this operation or // if there are any symlink following involved. Resolve(ctx Context, parent Ino, path string, inode *Ino, attr *Attr) syscall.Errno // GetAttr returns the attributes for given node. GetAttr(ctx Context, inode Ino, attr *Attr) syscall.Errno // SetAttr updates the attributes for given node. SetAttr(ctx Context, inode Ino, set uint16, sggidclearmode uint8, attr *Attr) syscall.Errno // Check setting attr is allowed or not CheckSetAttr(ctx Context, inode Ino, set uint16, attr Attr) syscall.Errno // Truncate changes the length for given file. Truncate(ctx Context, inode Ino, flags uint8, attrlength uint64, attr *Attr, skipPermCheck bool) syscall.Errno // Fallocate preallocate given space for given file. Fallocate(ctx Context, inode Ino, mode uint8, off uint64, size uint64) syscall.Errno // ReadLink returns the target of a symlink. ReadLink(ctx Context, inode Ino, path *[]byte) syscall.Errno // Symlink creates a symlink in a directory with given name. Symlink(ctx Context, parent Ino, name string, path string, inode *Ino, attr *Attr) syscall.Errno // Mknod creates a node in a directory with given name, type and permissions. Mknod(ctx Context, parent Ino, name string, _type uint8, mode uint16, cumask uint16, rdev uint32, path string, inode *Ino, attr *Attr) syscall.Errno // Mkdir creates a sub-directory with given name and mode. Mkdir(ctx Context, parent Ino, name string, mode uint16, cumask uint16, copysgid uint8, inode *Ino, attr *Attr) syscall.Errno // Unlink removes a file entry from a directory. // The file will be deleted if it's not linked by any entries and not open by any sessions. Unlink(ctx Context, parent Ino, name string, skipCheckTrash ...bool) syscall.Errno // Rmdir removes an empty sub-directory. Rmdir(ctx Context, parent Ino, name string, skipCheckTrash ...bool) syscall.Errno // Rename move an entry from a source directory to another with given name. // The targeted entry will be overwrited if it's a file or empty directory. // For Hadoop, the target should not be overwritten. Rename(ctx Context, parentSrc Ino, nameSrc string, parentDst Ino, nameDst string, flags uint32, inode *Ino, attr *Attr) syscall.Errno // Link creates an entry for node. Link(ctx Context, inodeSrc, parent Ino, name string, attr *Attr) syscall.Errno // Readdir returns all entries for given directory, which include attributes if plus is true. Readdir(ctx Context, inode Ino, wantattr uint8, entries *[]*Entry) syscall.Errno // Create creates a file in a directory with given name. Create(ctx Context, parent Ino, name string, mode uint16, cumask uint16, flags uint32, inode *Ino, attr *Attr) syscall.Errno // Open checks permission on a node and track it as open. Open(ctx Context, inode Ino, flags uint32, attr *Attr) syscall.Errno // Close a file. Close(ctx Context, inode Ino) syscall.Errno // Read returns the list of slices on the given chunk. Read(ctx Context, inode Ino, indx uint32, slices *[]Slice) syscall.Errno // NewSlice returns an id for new slice. NewSlice(ctx Context, id *uint64) syscall.Errno // Write put a slice of data on top of the given chunk. Write(ctx Context, inode Ino, indx uint32, off uint32, slice Slice, mtime time.Time) syscall.Errno // InvalidateChunkCache invalidate chunk cache InvalidateChunkCache(ctx Context, inode Ino, indx uint32) syscall.Errno // CopyFileRange copies part of a file to another one. CopyFileRange(ctx Context, fin Ino, offIn uint64, fout Ino, offOut uint64, size uint64, flags uint32, copied *uint64) syscall.Errno // GetParents returns a map of node parents (> 1 parents if hardlinked) GetParents(ctx Context, inode Ino) map[Ino]int // GetDirStat returns the space and inodes usage of a directory. GetDirStat(ctx Context, inode Ino) (stat *dirStat, st syscall.Errno) // GetXattr returns the value of extended attribute for given name. GetXattr(ctx Context, inode Ino, name string, vbuff *[]byte) syscall.Errno // ListXattr returns all extended attributes of a node. ListXattr(ctx Context, inode Ino, dbuff *[]byte) syscall.Errno // SetXattr update the extended attribute of a node. SetXattr(ctx Context, inode Ino, name string, value []byte, flags uint32) syscall.Errno // RemoveXattr removes the extended attribute of a node. RemoveXattr(ctx Context, inode Ino, name string) syscall.Errno // Flock tries to put a lock on given file. Flock(ctx Context, inode Ino, owner uint64, ltype uint32, block bool) syscall.Errno // Getlk returns the current lock owner for a range on a file. Getlk(ctx Context, inode Ino, owner uint64, ltype *uint32, start, end *uint64, pid *uint32) syscall.Errno // Setlk sets a file range lock on given file. Setlk(ctx Context, inode Ino, owner uint64, block bool, ltype uint32, start, end uint64, pid uint32) syscall.Errno // Compact all the chunks by merge small slices together CompactAll(ctx Context, threads int, bar *utils.Bar) syscall.Errno // ListSlices returns all slices used by all files. ListSlices(ctx Context, slices map[Ino][]Slice, delete bool, showProgress func()) syscall.Errno // Remove all files and directories recursively. Remove(ctx Context, parent Ino, name string, count *uint64) syscall.Errno // Get summary of a node; for a directory it will accumulate all its child nodes GetSummary(ctx Context, inode Ino, summary *Summary, recursive bool, strict bool) syscall.Errno // GetTreeSummary returns a summary in tree structure GetTreeSummary(ctx Context, root *TreeSummary, depth, topN uint8, strict bool, updateProgress func(count uint64, bytes uint64)) syscall.Errno // Clone a file or directory Clone(ctx Context, srcIno, dstParentIno Ino, dstName string, cmode uint8, cumask uint16, count, total *uint64) syscall.Errno // GetPaths returns all paths of an inode GetPaths(ctx Context, inode Ino) []string // Check integrity of an absolute path and repair it if asked Check(ctx Context, fpath string, repair bool, recursive bool, statAll bool) error // Change root to a directory specified by subdir Chroot(ctx Context, subdir string) syscall.Errno // Get a copy of the current format GetFormat() Format // OnMsg add a callback for the given message type. OnMsg(mtype uint32, cb MsgCallback) // OnReload register a callback for any change founded after reloaded. OnReload(func(new *Format)) HandleQuota(ctx Context, cmd uint8, dpath string, quotas map[string]*Quota, strict, repair bool) error // Dump the tree under root, which may be modified by checkRoot DumpMeta(w io.Writer, root Ino, keepSecret bool) error LoadMeta(r io.Reader) error InitMetrics(registerer prometheus.Registerer) // contains filtered or unexported methods }
Meta is a interface for a meta service for file system.
type MsgCallback ¶
type MsgCallback func(...interface{}) error
MsgCallback is a callback for messages from meta service.
type Session ¶
type Session struct { Sid uint64 Expire time.Time SessionInfo Sustained []Ino `json:",omitempty"` Flocks []Flock `json:",omitempty"` Plocks []Plock `json:",omitempty"` }
Session contains detailed information of a client session
type SessionInfo ¶
type Summary ¶
Summary represents the total number of files/directories and total length of all files inside a directory.
type TreeSummary ¶
Source Files ¶
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