Esempio n. 1
0
/*
 * The "packet" keg constructor.
 */
static int
mb_ctor_pack(void *mem, int size, void *arg, int how)
{
	struct mbuf *m;
	struct mb_args *args;
	int error, flags;
	short type;

	m = (struct mbuf *)mem;
	args = (struct mb_args *)arg;
	flags = args->flags;
	type = args->type;

#ifdef INVARIANTS
	trash_ctor(m->m_ext.ext_buf, MCLBYTES, arg, how);
#endif

	error = m_init(m, NULL, size, how, type, flags);

	/* m_ext is already initialized. */
	m->m_data = m->m_ext.ext_buf;
 	m->m_flags = (flags | M_EXT);

	return (error);
}
Esempio n. 2
0
/*
 * Constructor for Mbuf master zone.
 *
 * The 'arg' pointer points to a mb_args structure which
 * contains call-specific information required to support the
 * mbuf allocation API.  See mbuf.h.
 */
static int
mb_ctor_mbuf(void *mem, int size, void *arg, int how)
{
	struct mbuf *m;
	struct mb_args *args;
	int error;
	int flags;
	short type;

#ifdef INVARIANTS
	trash_ctor(mem, size, arg, how);
#endif
	args = (struct mb_args *)arg;
	type = args->type;

	/*
	 * The mbuf is initialized later.  The caller has the
	 * responsibility to set up any MAC labels too.
	 */
	if (type == MT_NOINIT)
		return (0);

	m = (struct mbuf *)mem;
	flags = args->flags;

	error = m_init(m, NULL, size, how, type, flags);

	return (error);
}
/*
 * The Cluster and Jumbo[PAGESIZE|9|16] zone constructor.
 *
 * Here the 'arg' pointer points to the Mbuf which we
 * are configuring cluster storage for.  If 'arg' is
 * empty we allocate just the cluster without setting
 * the mbuf to it.  See mbuf.h.
 */
static int
mb_ctor_clust(void *mem, int size, void *arg, int how)
{
	struct mbuf *m;
	u_int *refcnt;
	int type;
	uma_zone_t zone;

#ifdef INVARIANTS
	trash_ctor(mem, size, arg, how);
#endif
	switch (size) {
	case MCLBYTES:
		type = EXT_CLUSTER;
		zone = zone_clust;
		break;
#if MJUMPAGESIZE != MCLBYTES
	case MJUMPAGESIZE:
		type = EXT_JUMBOP;
		zone = zone_jumbop;
		break;
#endif
#ifdef PACKET_MMAP:
	case MBUF_FRAME_SIZE:
		type = EXT_PACKETMMAP;
		zone = zone_packetmmap;
		break;
#endif
	case MJUM9BYTES:
		type = EXT_JUMBO9;
		zone = zone_jumbo9;
		break;
	case MJUM16BYTES:
		type = EXT_JUMBO16;
		zone = zone_jumbo16;
		break;
	default:
		panic("unknown cluster size");
		break;
	}

	m = (struct mbuf *)arg;
	refcnt = uma_find_refcnt(zone, mem);
	*refcnt = 1;
	if (m != NULL) {
		m->m_ext.ext_buf = (caddr_t)mem;
		m->m_data = m->m_ext.ext_buf;
		m->m_flags |= M_EXT;
		m->m_ext.ext_free = NULL;
		m->m_ext.ext_arg1 = NULL;
		m->m_ext.ext_arg2 = NULL;
		m->m_ext.ext_size = size;
		m->m_ext.ext_type = type;
		m->m_ext.ref_cnt = refcnt;
	}

	return (0);
}
/*
 * Constructor for Mbuf master zone.
 *
 * The 'arg' pointer points to a mb_args structure which
 * contains call-specific information required to support the
 * mbuf allocation API.  See mbuf.h.
 */
static int
mb_ctor_mbuf(void *mem, int size, void *arg, int how)
{
	struct mbuf *m;
	struct mb_args *args;
#ifdef MAC
	int error;
#endif
	int flags;
	short type;

#ifdef INVARIANTS
	trash_ctor(mem, size, arg, how);
#endif
	m = (struct mbuf *)mem;
	args = (struct mb_args *)arg;
	flags = args->flags;
	type = args->type;

	/*
	 * The mbuf is initialized later.  The caller has the
	 * responsibility to set up any MAC labels too.
	 */
	if (type == MT_NOINIT)
		return (0);

	m->m_next = NULL;
	CHECK_SPLIT_LINKCNT(m, m->m_next, "mb_ctor_mbuf");

	m->m_nextpkt = NULL;
	m->m_len = 0;
	m->m_flags = flags;
	m->m_type = type;
	if (flags & M_PKTHDR) {
		m->m_data = m->m_pktdat;
		m->m_pkthdr.rcvif = NULL;
		m->m_pkthdr.header = NULL;
		m->m_pkthdr.len = 0;
		m->m_pkthdr.csum_flags = 0;
		m->m_pkthdr.csum_data = 0;
		m->m_pkthdr.tso_segsz = 0;
		m->m_pkthdr.ether_vtag = 0;
		m->m_pkthdr.flowid = 0;
		SLIST_INIT(&m->m_pkthdr.tags);
#ifdef MAC
		/* If the label init fails, fail the alloc */
		error = mac_mbuf_init(m, how);
		if (error)
			return (error);
#endif
	} else
		m->m_data = m->m_dat;
	return (0);
}
/*
 * The "packet" keg constructor.
 */
static int
mb_ctor_pack(void *mem, int size, void *arg, int how)
{
	struct mbuf *m;
	struct mb_args *args;
#ifdef MAC
	int error;
#endif
	int flags;
	short type;

	m = (struct mbuf *)mem;
	args = (struct mb_args *)arg;
	flags = args->flags;
	type = args->type;

#ifdef INVARIANTS
	trash_ctor(m->m_ext.ext_buf, MCLBYTES, arg, how);
#endif

	m->m_next = NULL;
	CHECK_SPLIT_LINKCNT(m, m->m_next, "mb_ctor_pack");

	m->m_nextpkt = NULL;
	m->m_data = m->m_ext.ext_buf;
	m->m_len = 0;
	m->m_flags = (flags | M_EXT);
	m->m_type = type;

	if (flags & M_PKTHDR) {
		m->m_pkthdr.rcvif = NULL;
		m->m_pkthdr.len = 0;
		m->m_pkthdr.header = NULL;
		m->m_pkthdr.csum_flags = 0;
		m->m_pkthdr.csum_data = 0;
		m->m_pkthdr.tso_segsz = 0;
		m->m_pkthdr.ether_vtag = 0;
		m->m_pkthdr.flowid = 0;
		SLIST_INIT(&m->m_pkthdr.tags);
#ifdef MAC
		/* If the label init fails, fail the alloc */
		error = mac_mbuf_init(m, how);
		if (error)
			return (error);
#endif
	}
	/* m_ext is already initialized. */

	return (0);
}
Esempio n. 6
0
/*
 * The Cluster and Jumbo[PAGESIZE|9|16] zone constructor.
 *
 * Here the 'arg' pointer points to the Mbuf which we
 * are configuring cluster storage for.  If 'arg' is
 * empty we allocate just the cluster without setting
 * the mbuf to it.  See mbuf.h.
 */
static int
mb_ctor_clust(void *mem, int size, void *arg, int how)
{
	struct mbuf *m;

#ifdef INVARIANTS
	trash_ctor(mem, size, arg, how);
#endif
	m = (struct mbuf *)arg;
	if (m != NULL) {
		m->m_ext.ext_buf = (caddr_t)mem;
		m->m_data = m->m_ext.ext_buf;
		m->m_flags |= M_EXT;
		m->m_ext.ext_free = NULL;
		m->m_ext.ext_arg1 = NULL;
		m->m_ext.ext_arg2 = NULL;
		m->m_ext.ext_size = size;
		m->m_ext.ext_type = m_gettype(size);
		m->m_ext.ext_flags = EXT_FLAG_EMBREF;
		m->m_ext.ext_count = 1;
	}

	return (0);
}
Esempio n. 7
0
/*
 * Checks an item to make sure it hasn't been overwritten since it was freed.
 *
 * Complies with standard fini arg/return
 *
 */
void
trash_fini(void *mem, int size)
{
	(void)trash_ctor(mem, size, NULL, 0);
}