getacl
parent_acl = getacl(file, -1, dirname);
acl = getacl(file, -1, next);
static struct l9p_acl *getacl(struct fs_fid *ff, int fd, const char *path);
parent_acl = getacl(file, -1, newname);
oparent_acl = getacl(file, -1, olddir);
facl = getacl(off, -1, onb);
facl = getacl(dirff, -1, newname);