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package mount
import (
"os"
"syscall"
"time"
"github.com/hanwen/go-fuse/v2/fuse"
"github.com/seaweedfs/seaweedfs/weed/filer"
"github.com/seaweedfs/seaweedfs/weed/glog"
"github.com/seaweedfs/seaweedfs/weed/pb/filer_pb"
)
func (wfs *WFS) GetAttr(cancel <-chan struct{}, input *fuse.GetAttrIn, out *fuse.AttrOut) (code fuse.Status) {
glog.V(4).Infof("GetAttr %v", input.NodeId)
if input.NodeId == 1 {
wfs.setRootAttr(out)
return fuse.OK
}
inode := input.NodeId
_, _, entry, status := wfs.maybeReadEntry(inode)
if status == fuse.OK {
out.AttrValid = 1
wfs.setAttrByPbEntry(&out.Attr, inode, entry, true)
return status
} else {
if fh, found := wfs.fhMap.FindFileHandle(inode); found {
out.AttrValid = 1
wfs.setAttrByPbEntry(&out.Attr, inode, fh.entry.GetEntry(), true)
out.Nlink = 0
return fuse.OK
}
}
return status
}
func (wfs *WFS) SetAttr(cancel <-chan struct{}, input *fuse.SetAttrIn, out *fuse.AttrOut) (code fuse.Status) {
if wfs.IsOverQuota {
return fuse.Status(syscall.ENOSPC)
}
path, fh, entry, status := wfs.maybeReadEntry(input.NodeId)
if status != fuse.OK || entry == nil {
return status
}
if fh != nil {
fh.entryLock.Lock()
defer fh.entryLock.Unlock()
}
wormEnforced, wormEnabled := wfs.wormEnforcedForEntry(path, entry)
if wormEnforced {
return fuse.EPERM
}
if size, ok := input.GetSize(); ok {
glog.V(4).Infof("%v setattr set size=%v chunks=%d", path, size, len(entry.GetChunks()))
if size < filer.FileSize(entry) {
// fmt.Printf("truncate %v \n", fullPath)
var chunks []*filer_pb.FileChunk
var truncatedChunks []*filer_pb.FileChunk
for _, chunk := range entry.GetChunks() {
int64Size := int64(chunk.Size)
if chunk.Offset+int64Size > int64(size) {
// this chunk is truncated
int64Size = int64(size) - chunk.Offset
if int64Size > 0 {
chunks = append(chunks, chunk)
glog.V(4).Infof("truncated chunk %+v from %d to %d\n", chunk.GetFileIdString(), chunk.Size, int64Size)
chunk.Size = uint64(int64Size)
} else {
glog.V(4).Infof("truncated whole chunk %+v\n", chunk.GetFileIdString())
truncatedChunks = append(truncatedChunks, chunk)
}
} else {
chunks = append(chunks, chunk)
}
}
// set the new chunks and reset entry cache
entry.Chunks = chunks
if fh != nil {
fh.entryChunkGroup.SetChunks(chunks)
}
}
entry.Attributes.Mtime = time.Now().Unix()
entry.Attributes.FileSize = size
}
if mode, ok := input.GetMode(); ok {
// commit the file to worm when it is set to readonly at the first time
if entry.WormEnforcedAtTsNs == 0 && wormEnabled && !hasWritePermission(mode) {
entry.WormEnforcedAtTsNs = time.Now().UnixNano()
}
// glog.V(4).Infof("setAttr mode %o", mode)
entry.Attributes.FileMode = chmod(entry.Attributes.FileMode, mode)
if input.NodeId == 1 {
wfs.option.MountMode = os.FileMode(chmod(uint32(wfs.option.MountMode), mode))
}
}
if uid, ok := input.GetUID(); ok {
entry.Attributes.Uid = uid
if input.NodeId == 1 {
wfs.option.MountUid = uid
}
}
if gid, ok := input.GetGID(); ok {
entry.Attributes.Gid = gid
if input.NodeId == 1 {
wfs.option.MountGid = gid
}
}
if atime, ok := input.GetATime(); ok {
entry.Attributes.Mtime = atime.Unix()
}
if mtime, ok := input.GetMTime(); ok {
entry.Attributes.Mtime = mtime.Unix()
}
out.AttrValid = 1
size, includeSize := input.GetSize()
if includeSize {
out.Attr.Size = size
}
wfs.setAttrByPbEntry(&out.Attr, input.NodeId, entry, !includeSize)
if fh != nil {
fh.dirtyMetadata = true
return fuse.OK
}
return wfs.saveEntry(path, entry)
}
func (wfs *WFS) setRootAttr(out *fuse.AttrOut) {
now := uint64(time.Now().Unix())
out.AttrValid = 119
out.Ino = 1
setBlksize(&out.Attr, blockSize)
out.Uid = wfs.option.MountUid
out.Gid = wfs.option.MountGid
out.Mtime = now
out.Ctime = now
out.Atime = now
out.Mode = toSyscallType(os.ModeDir) | uint32(wfs.option.MountMode)
out.Nlink = 1
}
func (wfs *WFS) setAttrByPbEntry(out *fuse.Attr, inode uint64, entry *filer_pb.Entry, calculateSize bool) {
out.Ino = inode
setBlksize(out, blockSize)
if entry == nil {
return
}
if entry.Attributes != nil && entry.Attributes.Inode != 0 {
out.Ino = entry.Attributes.Inode
}
if calculateSize {
out.Size = filer.FileSize(entry)
}
if entry.FileMode()&os.ModeSymlink != 0 {
out.Size = uint64(len(entry.Attributes.SymlinkTarget))
}
out.Blocks = (out.Size + blockSize - 1) / blockSize
out.Mtime = uint64(entry.Attributes.Mtime)
out.Ctime = uint64(entry.Attributes.Mtime)
out.Atime = uint64(entry.Attributes.Mtime)
out.Mode = toSyscallMode(os.FileMode(entry.Attributes.FileMode))
if entry.HardLinkCounter > 0 {
out.Nlink = uint32(entry.HardLinkCounter)
} else {
out.Nlink = 1
}
out.Uid = entry.Attributes.Uid
out.Gid = entry.Attributes.Gid
out.Rdev = entry.Attributes.Rdev
}
func (wfs *WFS) setAttrByFilerEntry(out *fuse.Attr, inode uint64, entry *filer.Entry) {
out.Ino = inode
out.Size = entry.FileSize
if entry.Mode&os.ModeSymlink != 0 {
out.Size = uint64(len(entry.SymlinkTarget))
}
out.Blocks = (out.Size + blockSize - 1) / blockSize
setBlksize(out, blockSize)
out.Atime = uint64(entry.Attr.Mtime.Unix())
out.Mtime = uint64(entry.Attr.Mtime.Unix())
out.Ctime = uint64(entry.Attr.Mtime.Unix())
out.Mode = toSyscallMode(entry.Attr.Mode)
if entry.HardLinkCounter > 0 {
out.Nlink = uint32(entry.HardLinkCounter)
} else {
out.Nlink = 1
}
out.Uid = entry.Attr.Uid
out.Gid = entry.Attr.Gid
out.Rdev = entry.Attr.Rdev
}
func (wfs *WFS) outputPbEntry(out *fuse.EntryOut, inode uint64, entry *filer_pb.Entry) {
out.NodeId = inode
out.Generation = 1
out.EntryValid = 1
out.AttrValid = 1
wfs.setAttrByPbEntry(&out.Attr, inode, entry, true)
}
func (wfs *WFS) outputFilerEntry(out *fuse.EntryOut, inode uint64, entry *filer.Entry) {
out.NodeId = inode
out.Generation = 1
out.EntryValid = 1
out.AttrValid = 1
wfs.setAttrByFilerEntry(&out.Attr, inode, entry)
}
func chmod(existing uint32, mode uint32) uint32 {
return existing&^07777 | mode&07777
}
const ownerWrite = 0o200
const groupWrite = 0o020
const otherWrite = 0o002
func hasWritePermission(mode uint32) bool {
return (mode&ownerWrite != 0) || (mode&groupWrite != 0) || (mode&otherWrite != 0)
}
func toSyscallMode(mode os.FileMode) uint32 {
return toSyscallType(mode) | uint32(mode)
}
func toSyscallType(mode os.FileMode) uint32 {
switch mode & os.ModeType {
case os.ModeDir:
return syscall.S_IFDIR
case os.ModeSymlink:
return syscall.S_IFLNK
case os.ModeNamedPipe:
return syscall.S_IFIFO
case os.ModeSocket:
return syscall.S_IFSOCK
case os.ModeDevice:
return syscall.S_IFBLK
case os.ModeCharDevice:
return syscall.S_IFCHR
default:
return syscall.S_IFREG
}
}
func toOsFileType(mode uint32) os.FileMode {
switch mode & (syscall.S_IFMT & 0xffff) {
case syscall.S_IFDIR:
return os.ModeDir
case syscall.S_IFLNK:
return os.ModeSymlink
case syscall.S_IFIFO:
return os.ModeNamedPipe
case syscall.S_IFSOCK:
return os.ModeSocket
case syscall.S_IFBLK:
return os.ModeDevice
case syscall.S_IFCHR:
return os.ModeCharDevice
default:
return 0
}
}
func toOsFileMode(mode uint32) os.FileMode {
return toOsFileType(mode) | os.FileMode(mode&07777)
}
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