func (m *MaggieFuse) Rmdir(header *fuse.InHeader, name string) (code fuse.Status) {
// sanity checks on parent, child
// pull parent
parent, err := m.names.GetInode(header.NodeId)
if err != nil {
return fuse.EROFS
}
// check if name doesn't exist
childEntry, exists := parent.Children[name]
if !exists {
return fuse.ENOENT
}
// look up node for name
child, err := m.names.GetInode(childEntry.Inodeid)
if err != nil {
return fuse.EROFS
}
// if child is not dir, err
if !child.IsDir() {
return fuse.Status(syscall.ENOTDIR)
}
fmt.Printf("removing directory %d with children %+v", child.Inodeid, child.Children)
if len(child.Children) != 0 {
return fuse.Status(syscall.ENOTEMPTY)
}
// actually unlink
err = m.names.Unlink(parent.Inodeid, name)
if err != nil {
return fuse.EROFS
}
return fuse.OK
}
func (m *MaggieFuse) Link(input *fuse.LinkIn, name string, out *fuse.EntryOut) (code fuse.Status) {
// new parent is header.NodeId
// existing node is input.Oldnodeid
// add link to new parent
err := m.names.Link(input.InHeader.NodeId, input.Oldnodeid, name, false)
if err == maggiefs.E_EXISTS {
return fuse.Status(syscall.EEXIST)
} else if err != nil {
return fuse.EROFS
}
return fuse.OK
}
func (m *MaggieFuse) Unlink(header *fuse.InHeader, name string) (code fuse.Status) {
// finally unlink
err := m.names.Unlink(header.NodeId, name)
if err != nil {
if err == maggiefs.E_NOENT {
return fuse.ENOENT
} else if err == maggiefs.E_ISDIR {
return fuse.Status(syscall.EISDIR)
}
return fuse.EROFS
}
return fuse.OK
}
func (m *MaggieFuse) Mkdir(input *fuse.MkdirIn, name string, out *fuse.EntryOut) (code fuse.Status) {
// make new child
currTime := time.Now().Unix()
i := maggiefs.Inode{
0, // id 0 to start, we get id when inserting
0,
maggiefs.FTYPE_DIR,
0,
07777 & input.Mode,
currTime,
currTime,
0,
input.InHeader.Uid,
input.InHeader.Gid,
"",
make([]maggiefs.Block, 0, 0),
make(map[string]maggiefs.Dentry),
}
// save
id, err := m.names.AddInode(&i)
if err != nil {
return fuse.EROFS
}
i.Inodeid = id
// link parent
err = m.names.Link(input.InHeader.NodeId, id, name, false)
if err != nil {
// garbage collector will clean up our 0 reference node
if err == maggiefs.E_EXISTS {
return fuse.Status(syscall.EEXIST)
}
if err == maggiefs.E_NOTDIR {
return fuse.ENOTDIR
}
return fuse.EROFS
}
// send entry back to child
fillEntryOut(out, &i)
return fuse.OK
}
func (m *MaggieFuse) Mknod(input *fuse.MknodIn, name string, out *fuse.EntryOut) (code fuse.Status) {
//build node
currTime := time.Now().Unix()
i := maggiefs.Inode{
0, // id 0 to start
0, // gen 0
maggiefs.FTYPE_REG,
0,
input.Mode & 07777,
currTime,
currTime,
1,
input.InHeader.Uid,
input.InHeader.Gid,
"",
make([]maggiefs.Block, 0, 0),
make(map[string]maggiefs.Dentry),
}
// save new node
id, err := m.names.AddInode(&i)
if err != nil {
return fuse.EROFS
}
i.Inodeid = id
// link parent
err = m.names.Link(input.InHeader.NodeId, i.Inodeid, name, false)
if err != nil {
if err == maggiefs.E_EXISTS {
return fuse.Status(syscall.EEXIST)
} else {
return fuse.EROFS
}
}
// output
fillEntryOut(out, &i)
return fuse.OK
}
func (m *MaggieFuse) Symlink(header *fuse.InHeader, pointedTo string, linkName string, out *fuse.EntryOut) (code fuse.Status) {
// new inode type symlink
currTime := time.Now().Unix()
i := maggiefs.Inode{
0, // id 0 to start, we get id when inserting
0,
maggiefs.FTYPE_LNK,
0,
0777,
currTime,
currTime,
0,
header.Uid,
header.Gid,
pointedTo,
make([]maggiefs.Block, 0, 0),
make(map[string]maggiefs.Dentry),
}
// save
id, err := m.names.AddInode(&i)
if err != nil {
return fuse.EROFS
}
i.Inodeid = id
// link parent
err = m.names.Link(header.NodeId, i.Inodeid, linkName, false)
if err != nil {
if err == maggiefs.E_EXISTS {
return fuse.Status(syscall.EEXIST)
} else if err == maggiefs.E_NOTDIR {
return fuse.ENOTDIR
}
return fuse.EROFS
}
// send entry back to child
fillEntryOut(out, &i)
return fuse.OK
}