Function vn_printf

freebsd/kern/vfs_subr.c:4076–4205

    "new hold count flag not added to vn_printf");

void
vn_printf(struct vnode *vp, const char *fmt, ...)
{
	va_list ap;
	char buf[256], buf2[16];
	u_long flags;
	u_int holdcnt;
	short irflag;

	va_start(ap, fmt);
	vprintf(fmt, ap);
	va_end(ap);
	printf("%p: ", (void *)vp);
	printf("type %s\n", typename[vp->v_type]);
	holdcnt = atomic_load_int(&vp->v_holdcnt);
	printf("    usecount %d, writecount %d, refcount %d seqc users %d",
	    vp->v_usecount, vp->v_writecount, holdcnt & ~VHOLD_ALL_FLAGS,
	    vp->v_seqc_users);
	switch (vp->v_type) {
	case VDIR:
		printf(" mountedhere %p\n", vp->v_mountedhere);
		break;
	case VCHR:
		printf(" rdev %p\n", vp->v_rdev);
		break;
	case VSOCK:
		printf(" socket %p\n", vp->v_unpcb);
		break;
	case VFIFO:
		printf(" fifoinfo %p\n", vp->v_fifoinfo);
		break;
	default:
		printf("\n");
		break;
	}
	buf[0] = '\0';
	buf[1] = '\0';
	if (holdcnt & VHOLD_NO_SMR)
		strlcat(buf, "|VHOLD_NO_SMR", sizeof(buf));
	printf("    hold count flags (%s)\n", buf + 1);

	buf[0] = '\0';
	buf[1] = '\0';
	irflag = vn_irflag_read(vp);
	if (irflag & VIRF_DOOMED)
		strlcat(buf, "|VIRF_DOOMED", sizeof(buf));
	if (irflag & VIRF_PGREAD)
		strlcat(buf, "|VIRF_PGREAD", sizeof(buf));
	if (irflag & VIRF_MOUNTPOINT)
		strlcat(buf, "|VIRF_MOUNTPOINT", sizeof(buf));
	flags = irflag & ~(VIRF_DOOMED | VIRF_PGREAD | VIRF_MOUNTPOINT);
	if (flags != 0) {
		snprintf(buf2, sizeof(buf2), "|VIRF(0x%lx)", flags);
		strlcat(buf, buf2, sizeof(buf));
	}
	if (vp->v_vflag & VV_ROOT)
		strlcat(buf, "|VV_ROOT", sizeof(buf));
	if (vp->v_vflag & VV_ISTTY)