func (m *MaggieFuse) GetAttr(input *fuse.GetAttrIn, out *fuse.AttrOut) (code fuse.Status) {
// optimized path for open files
if input.Fh_ > 0 {
log.Printf("Fetching ino for GetAttr from openFileMap for fh %d", input.Fh_)
_, i, err := m.openFiles.getInode(input.Fh_)
if err != nil {
return fuse.ENOSYS
}
if i != nil {
log.Printf("Got ino for GetAttr from openFileMap")
fillAttrOut(out, i)
out.AttrValid = uint64(1) // hold onto it for a second
out.AttrValidNsec = uint32(1e9)
return fuse.OK
}
}
// normal case for files that aren't currently open
i, err := m.names.GetInode(input.InHeader.NodeId)
if err != nil {
return fuse.EROFS
}
fillAttrOut(out, i)
return fuse.OK
}
func fillAttrOut(out *fuse.AttrOut, i *maggiefs.Inode) {
// fuse.Attr
out.Ino = i.Inodeid
out.Size = i.Length
out.Blocks = numBlocks(i.Length, maggiefs.PAGESIZE)
out.Atime = uint64(0)
out.Mtime = uint64(i.Mtime) // Mtime is user modifiable and is the last time data changed
out.Ctime = uint64(i.Ctime) // Ctime is tracked by the FS and changes when attrs or data change
out.Atimensec = uint32(0)
out.Mtimensec = uint32(0)
out.Ctimensec = uint32(0)
out.Mode = i.FullMode()
out.Nlink = i.Nlink
out.Uid = i.Uid
out.Gid = i.Gid
out.Rdev = uint32(0) // regular file, not block dvice
out.Blksize = maggiefs.PAGESIZE
// fuse.AttrOut
out.AttrValid = uint64(0)
out.AttrValidNsec = uint32(100)
}