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-rw-r--r--lib/librte_mbuf/rte_mbuf.c252
1 files changed, 252 insertions, 0 deletions
diff --git a/lib/librte_mbuf/rte_mbuf.c b/lib/librte_mbuf/rte_mbuf.c
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+++ b/lib/librte_mbuf/rte_mbuf.c
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+/*-
+ * BSD LICENSE
+ *
+ * Copyright(c) 2010-2012 Intel Corporation. All rights reserved.
+ * 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.
+ *
+ * version: DPDK.L.1.2.3-3
+ */
+
+#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_tailq.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>
+
+/*
+ * 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;
+
+ memset(m, 0, mp->elt_size);
+
+ /* start of buffer is just after mbuf structure */
+ m->buf_addr = (char *)m + sizeof(struct rte_mbuf);
+ m->buf_physaddr = rte_mempool_virt2phy(mp, m) +
+ sizeof(struct rte_mbuf);
+ m->buf_len = (uint16_t) (mp->elt_size - sizeof(struct rte_mbuf));
+
+ /* init some constant fields */
+ m->type = RTE_MBUF_CTRL;
+ m->ctrl.data = (char *)m->buf_addr;
+ m->pool = (struct rte_mempool *)mp;
+}
+
+/*
+ * 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 *mbp_priv;
+ uint16_t roomsz;
+
+ mbp_priv = rte_mempool_get_priv(mp);
+ roomsz = (uint16_t)(uintptr_t)opaque_arg;
+
+ /* Use default data room size. */
+ if (0 == roomsz)
+ roomsz = 2048 + RTE_PKTMBUF_HEADROOM;
+
+ mbp_priv->mbuf_data_room_size = roomsz;
+}
+
+/*
+ * 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 buf_len = mp->elt_size - sizeof(struct rte_mbuf);
+
+ RTE_MBUF_ASSERT(mp->elt_size >= sizeof(struct rte_mbuf));
+
+ memset(m, 0, mp->elt_size);
+
+ /* start of buffer is just after mbuf structure */
+ m->buf_addr = (char *)m + sizeof(struct rte_mbuf);
+ m->buf_physaddr = rte_mempool_virt2phy(mp, m) +
+ sizeof(struct rte_mbuf);
+ m->buf_len = (uint16_t)buf_len;
+
+ /* keep some headroom between start of buffer and data */
+ m->pkt.data = (char*) m->buf_addr + RTE_MIN(RTE_PKTMBUF_HEADROOM, m->buf_len);
+
+ /* init some constant fields */
+ m->type = RTE_MBUF_PKT;
+ m->pool = mp;
+ m->pkt.nb_segs = 1;
+ m->pkt.in_port = 0xff;
+}
+
+static void
+rte_pktmbuf_hexdump(const void *buf, unsigned int len)
+{
+ unsigned int i, out, ofs;
+ const unsigned char *data = buf;
+#define LINE_LEN 80
+ char line[LINE_LEN];
+
+ printf(" dump data at 0x%p, len=%u\n", data, len);
+ ofs = 0;
+ while (ofs < len) {
+ out = rte_snprintf(line, LINE_LEN, " %08X", ofs);
+ for (i = 0; ofs+i < len && i < 16; i++)
+ out += rte_snprintf(line+out, LINE_LEN - out, " %02X",
+ data[ofs+i]&0xff);
+ for (; i <= 16; i++)
+ out += rte_snprintf(line+out, LINE_LEN - out, " ");
+ for (i = 0; ofs < len && i < 16; i++, ofs++) {
+ unsigned char c = data[ofs];
+ if (!isascii(c) || !isprint(c))
+ c = '.';
+ out += rte_snprintf(line+out, LINE_LEN - out, "%c", c);
+ }
+ printf("%s\n", line);
+ }
+}
+
+/* do some sanity checks on a mbuf: panic if it fails */
+void
+rte_mbuf_sanity_check(const struct rte_mbuf *m, enum rte_mbuf_type t,
+ int is_header)
+{
+ const struct rte_mbuf *m_seg;
+ unsigned nb_segs;
+
+ if (m == NULL)
+ rte_panic("mbuf is NULL\n");
+ if (m->type != (uint8_t)t)
+ rte_panic("bad mbuf type\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");
+
+#ifdef RTE_MBUF_SCATTER_GATHER
+ uint16_t cnt = rte_mbuf_refcnt_read(m);
+ if ((cnt == 0) || (cnt == UINT16_MAX))
+ rte_panic("bad ref cnt\n");
+#endif
+
+ /* nothing to check for ctrl messages */
+ if (m->type == RTE_MBUF_CTRL)
+ return;
+
+ /* check pkt consistency */
+ else if (m->type == RTE_MBUF_PKT) {
+
+ /* nothing to check for sub-segments */
+ if (is_header == 0)
+ return;
+
+ nb_segs = m->pkt.nb_segs;
+ m_seg = m;
+ while (m_seg && nb_segs != 0) {
+ m_seg = m_seg->pkt.next;
+ nb_segs --;
+ }
+ if (nb_segs != 0)
+ rte_panic("bad nb_segs\n");
+ return;
+ }
+
+ rte_panic("unknown mbuf type\n");
+}
+
+/* dump a mbuf on console */
+void
+rte_pktmbuf_dump(const struct rte_mbuf *m, unsigned dump_len)
+{
+ unsigned int len;
+ unsigned nb_segs;
+
+ __rte_mbuf_sanity_check(m, RTE_MBUF_PKT, 1);
+
+ printf("dump mbuf at 0x%p, phys=%"PRIx64", buf_len=%u\n",
+ m, (uint64_t)m->buf_physaddr, (unsigned)m->buf_len);
+ printf(" pkt_len=%"PRIx32", ol_flags=%"PRIx16", nb_segs=%u, "
+ "in_port=%u\n", m->pkt.pkt_len, m->ol_flags,
+ (unsigned)m->pkt.nb_segs, (unsigned)m->pkt.in_port);
+ nb_segs = m->pkt.nb_segs;
+
+ while (m && nb_segs != 0) {
+ __rte_mbuf_sanity_check(m, RTE_MBUF_PKT, 0);
+
+ printf(" segment at 0x%p, data=0x%p, data_len=%u\n",
+ m, m->pkt.data, (unsigned)m->pkt.data_len);
+ len = dump_len;
+ if (len > m->pkt.data_len)
+ len = m->pkt.data_len;
+ if (len != 0)
+ rte_pktmbuf_hexdump(m->pkt.data, len);
+ dump_len -= len;
+ m = m->pkt.next;
+ nb_segs --;
+ }
+}