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numam-dpdk/lib/librte_mbuf/rte_mbuf.c
Olivier Matz 355e6735b3 mbuf: fix cloning with private mbuf data 
Add a new priv_size field in mbuf structure that should
be initialized at mbuf pool creation. This field contains the
size of the application private data in mbufs.

Introduce new static inline functions rte_mbuf_from_indirect()
and rte_mbuf_to_baddr() to replace the existing macros, which
take the private size in account when attaching and detaching
mbufs.

Signed-off-by: Olivier Matz <olivier.matz@6wind.com>
Reviewed-by: Zoltan Kiss <zoltan.kiss@linaro.org>
Acked-by: Neil Horman <nhorman@tuxdriver.com>
Acked-by: Konstantin Ananyev <konstantin.ananyev@intel.com>
2015-04-28 11:34:10 +02:00

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/*-
* BSD LICENSE
*
* Copyright(c) 2010-2014 Intel Corporation. All rights reserved.
* Copyright 2014 6WIND S.A.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* * Neither the name of Intel Corporation nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <string.h>
#include <stdio.h>
#include <stdlib.h>
#include <stdint.h>
#include <stdarg.h>
#include <inttypes.h>
#include <errno.h>
#include <ctype.h>
#include <sys/queue.h>
#include <rte_debug.h>
#include <rte_common.h>
#include <rte_log.h>
#include <rte_memory.h>
#include <rte_memzone.h>
#include <rte_launch.h>
#include <rte_eal.h>
#include <rte_per_lcore.h>
#include <rte_lcore.h>
#include <rte_atomic.h>
#include <rte_branch_prediction.h>
#include <rte_ring.h>
#include <rte_mempool.h>
#include <rte_mbuf.h>
#include <rte_string_fns.h>
#include <rte_hexdump.h>
/*
* ctrlmbuf constructor, given as a callback function to
* rte_mempool_create()
*/
void
rte_ctrlmbuf_init(struct rte_mempool *mp,
__attribute__((unused)) void *opaque_arg,
void *_m,
__attribute__((unused)) unsigned i)
{
struct rte_mbuf *m = _m;
rte_pktmbuf_init(mp, opaque_arg, _m, i);
m->ol_flags |= CTRL_MBUF_FLAG;
}
/*
* pktmbuf pool constructor, given as a callback function to
* rte_mempool_create()
*/
void
rte_pktmbuf_pool_init(struct rte_mempool *mp, void *opaque_arg)
{
struct rte_pktmbuf_pool_private *user_mbp_priv, *mbp_priv;
struct rte_pktmbuf_pool_private default_mbp_priv;
uint16_t roomsz;
RTE_MBUF_ASSERT(mp->elt_size >= sizeof(struct rte_mbuf));
/* if no structure is provided, assume no mbuf private area */
user_mbp_priv = opaque_arg;
if (user_mbp_priv == NULL) {
default_mbp_priv.mbuf_priv_size = 0;
if (mp->elt_size > sizeof(struct rte_mbuf))
roomsz = mp->elt_size - sizeof(struct rte_mbuf);
else
roomsz = 0;
default_mbp_priv.mbuf_data_room_size = roomsz;
user_mbp_priv = &default_mbp_priv;
}
RTE_MBUF_ASSERT(mp->elt_size >= sizeof(struct rte_mbuf) +
user_mbp_priv->mbuf_data_room_size +
user_mbp_priv->mbuf_priv_size);
mbp_priv = rte_mempool_get_priv(mp);
memcpy(mbp_priv, user_mbp_priv, sizeof(*mbp_priv));
}
/*
* pktmbuf constructor, given as a callback function to
* rte_mempool_create().
* Set the fields of a packet mbuf to their default values.
*/
void
rte_pktmbuf_init(struct rte_mempool *mp,
__attribute__((unused)) void *opaque_arg,
void *_m,
__attribute__((unused)) unsigned i)
{
struct rte_mbuf *m = _m;
uint32_t mbuf_size, buf_len, priv_size;
priv_size = rte_pktmbuf_priv_size(mp);
mbuf_size = sizeof(struct rte_mbuf) + priv_size;
buf_len = rte_pktmbuf_data_room_size(mp);
RTE_MBUF_ASSERT(mp->elt_size >= mbuf_size);
RTE_MBUF_ASSERT(buf_len <= UINT16_MAX);
memset(m, 0, mp->elt_size);
/* start of buffer is after mbuf structure and priv data */
m->priv_size = priv_size;
m->buf_addr = (char *)m + mbuf_size;
m->buf_physaddr = rte_mempool_virt2phy(mp, m) + mbuf_size;
m->buf_len = (uint16_t)buf_len;
/* keep some headroom between start of buffer and data */
m->data_off = RTE_MIN(RTE_PKTMBUF_HEADROOM, (uint16_t)m->buf_len);
/* init some constant fields */
m->pool = mp;
m->nb_segs = 1;
m->port = 0xff;
}
/* helper to create a mbuf pool */
struct rte_mempool *
rte_pktmbuf_pool_create(const char *name, unsigned n,
unsigned cache_size, uint16_t priv_size, uint16_t data_room_size,
int socket_id)
{
struct rte_pktmbuf_pool_private mbp_priv;
unsigned elt_size;
elt_size = sizeof(struct rte_mbuf) + (unsigned)priv_size +
(unsigned)data_room_size;
mbp_priv.mbuf_data_room_size = data_room_size;
mbp_priv.mbuf_priv_size = priv_size;
return rte_mempool_create(name, n, elt_size,
cache_size, sizeof(struct rte_pktmbuf_pool_private),
rte_pktmbuf_pool_init, &mbp_priv, rte_pktmbuf_init, NULL,
socket_id, 0);
}
/* do some sanity checks on a mbuf: panic if it fails */
void
rte_mbuf_sanity_check(const struct rte_mbuf *m, int is_header)
{
const struct rte_mbuf *m_seg;
unsigned nb_segs;
if (m == NULL)
rte_panic("mbuf is NULL\n");
/* generic checks */
if (m->pool == NULL)
rte_panic("bad mbuf pool\n");
if (m->buf_physaddr == 0)
rte_panic("bad phys addr\n");
if (m->buf_addr == NULL)
rte_panic("bad virt addr\n");
uint16_t cnt = rte_mbuf_refcnt_read(m);
if ((cnt == 0) || (cnt == UINT16_MAX))
rte_panic("bad ref cnt\n");
/* nothing to check for sub-segments */
if (is_header == 0)
return;
nb_segs = m->nb_segs;
m_seg = m;
while (m_seg && nb_segs != 0) {
m_seg = m_seg->next;
nb_segs--;
}
if (nb_segs != 0)
rte_panic("bad nb_segs\n");
}
/* dump a mbuf on console */
void
rte_pktmbuf_dump(FILE *f, const struct rte_mbuf *m, unsigned dump_len)
{
unsigned int len;
unsigned nb_segs;
__rte_mbuf_sanity_check(m, 1);
fprintf(f, "dump mbuf at 0x%p, phys=%"PRIx64", buf_len=%u\n",
m, (uint64_t)m->buf_physaddr, (unsigned)m->buf_len);
fprintf(f, " pkt_len=%"PRIu32", ol_flags=%"PRIx64", nb_segs=%u, "
"in_port=%u\n", m->pkt_len, m->ol_flags,
(unsigned)m->nb_segs, (unsigned)m->port);
nb_segs = m->nb_segs;
while (m && nb_segs != 0) {
__rte_mbuf_sanity_check(m, 0);
fprintf(f, " segment at 0x%p, data=0x%p, data_len=%u\n",
m, rte_pktmbuf_mtod(m, void *), (unsigned)m->data_len);
len = dump_len;
if (len > m->data_len)
len = m->data_len;
if (len != 0)
rte_hexdump(f, NULL, rte_pktmbuf_mtod(m, void *), len);
dump_len -= len;
m = m->next;
nb_segs --;
}
}
/*
* Get the name of a RX offload flag. Must be kept synchronized with flag
* definitions in rte_mbuf.h.
*/
const char *rte_get_rx_ol_flag_name(uint64_t mask)
{
switch (mask) {
case PKT_RX_VLAN_PKT: return "PKT_RX_VLAN_PKT";
case PKT_RX_RSS_HASH: return "PKT_RX_RSS_HASH";
case PKT_RX_FDIR: return "PKT_RX_FDIR";
case PKT_RX_L4_CKSUM_BAD: return "PKT_RX_L4_CKSUM_BAD";
case PKT_RX_IP_CKSUM_BAD: return "PKT_RX_IP_CKSUM_BAD";
/* case PKT_RX_EIP_CKSUM_BAD: return "PKT_RX_EIP_CKSUM_BAD"; */
/* case PKT_RX_OVERSIZE: return "PKT_RX_OVERSIZE"; */
/* case PKT_RX_HBUF_OVERFLOW: return "PKT_RX_HBUF_OVERFLOW"; */
/* case PKT_RX_RECIP_ERR: return "PKT_RX_RECIP_ERR"; */
/* case PKT_RX_MAC_ERR: return "PKT_RX_MAC_ERR"; */
case PKT_RX_IPV4_HDR: return "PKT_RX_IPV4_HDR";
case PKT_RX_IPV4_HDR_EXT: return "PKT_RX_IPV4_HDR_EXT";
case PKT_RX_IPV6_HDR: return "PKT_RX_IPV6_HDR";
case PKT_RX_IPV6_HDR_EXT: return "PKT_RX_IPV6_HDR_EXT";
case PKT_RX_IEEE1588_PTP: return "PKT_RX_IEEE1588_PTP";
case PKT_RX_IEEE1588_TMST: return "PKT_RX_IEEE1588_TMST";
case PKT_RX_TUNNEL_IPV4_HDR: return "PKT_RX_TUNNEL_IPV4_HDR";
case PKT_RX_TUNNEL_IPV6_HDR: return "PKT_RX_TUNNEL_IPV6_HDR";
default: return NULL;
}
}
/*
* Get the name of a TX offload flag. Must be kept synchronized with flag
* definitions in rte_mbuf.h.
*/
const char *rte_get_tx_ol_flag_name(uint64_t mask)
{
switch (mask) {
case PKT_TX_VLAN_PKT: return "PKT_TX_VLAN_PKT";
case PKT_TX_IP_CKSUM: return "PKT_TX_IP_CKSUM";
case PKT_TX_TCP_CKSUM: return "PKT_TX_TCP_CKSUM";
case PKT_TX_SCTP_CKSUM: return "PKT_TX_SCTP_CKSUM";
case PKT_TX_UDP_CKSUM: return "PKT_TX_UDP_CKSUM";
case PKT_TX_IEEE1588_TMST: return "PKT_TX_IEEE1588_TMST";
case PKT_TX_TCP_SEG: return "PKT_TX_TCP_SEG";
case PKT_TX_IPV4: return "PKT_TX_IPV4";
case PKT_TX_IPV6: return "PKT_TX_IPV6";
case PKT_TX_OUTER_IP_CKSUM: return "PKT_TX_OUTER_IP_CKSUM";
case PKT_TX_OUTER_IPV4: return "PKT_TX_OUTER_IPV4";
case PKT_TX_OUTER_IPV6: return "PKT_TX_OUTER_IPV6";
default: return NULL;
}
}
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