-/*-
- * BSD LICENSE
- *
- * Copyright(c) 2010-2014 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.
+/* SPDX-License-Identifier: BSD-3-Clause
+ * Copyright(c) 2010-2014 Intel Corporation
*/
#ifndef _IP_FRAG_COMMON_H_
#define _IP_FRAG_COMMON_H_
-/* Debug on/off */
-#ifdef RTE_IP_FRAG_DEBUG
+#include "rte_ip_frag.h"
-#define RTE_IP_FRAG_ASSERT(exp) \
-if (!(exp)) { \
- rte_panic("function %s, line%d\tassert \"" #exp "\" failed\n", \
- __func__, __LINE__); \
+/* logging macros. */
+#ifdef RTE_LIBRTE_IP_FRAG_DEBUG
+#define IP_FRAG_LOG(lvl, fmt, args...) RTE_LOG(lvl, USER1, fmt, ##args)
+#else
+#define IP_FRAG_LOG(lvl, fmt, args...) do {} while(0)
+#endif /* IP_FRAG_DEBUG */
+
+#define IPV4_KEYLEN 1
+#define IPV6_KEYLEN 4
+
+/* helper macros */
+#define IP_FRAG_MBUF2DR(dr, mb) ((dr)->row[(dr)->cnt++] = (mb))
+
+#define IPv6_KEY_BYTES(key) \
+ (key)[0], (key)[1], (key)[2], (key)[3]
+#define IPv6_KEY_BYTES_FMT \
+ "%08" PRIx64 "%08" PRIx64 "%08" PRIx64 "%08" PRIx64
+
+#ifdef RTE_LIBRTE_IP_FRAG_TBL_STAT
+#define IP_FRAG_TBL_STAT_UPDATE(s, f, v) ((s)->f += (v))
+#else
+#define IP_FRAG_TBL_STAT_UPDATE(s, f, v) do {} while (0)
+#endif /* IP_FRAG_TBL_STAT */
+
+/* internal functions declarations */
+struct rte_mbuf * ip_frag_process(struct ip_frag_pkt *fp,
+ struct rte_ip_frag_death_row *dr, struct rte_mbuf *mb,
+ uint16_t ofs, uint16_t len, uint16_t more_frags);
+
+struct ip_frag_pkt * ip_frag_find(struct rte_ip_frag_tbl *tbl,
+ struct rte_ip_frag_death_row *dr,
+ const struct ip_frag_key *key, uint64_t tms);
+
+struct ip_frag_pkt * ip_frag_lookup(struct rte_ip_frag_tbl *tbl,
+ const struct ip_frag_key *key, uint64_t tms,
+ struct ip_frag_pkt **free, struct ip_frag_pkt **stale);
+
+/* these functions need to be declared here as ip_frag_process relies on them */
+struct rte_mbuf *ipv4_frag_reassemble(struct ip_frag_pkt *fp);
+struct rte_mbuf *ipv6_frag_reassemble(struct ip_frag_pkt *fp);
+
+
+
+/*
+ * misc frag key functions
+ */
+
+/* check if key is empty */
+static inline int
+ip_frag_key_is_empty(const struct ip_frag_key * key)
+{
+ return (key->key_len == 0);
}
-#else /*RTE_IP_FRAG_DEBUG*/
+/* invalidate the key */
+static inline void
+ip_frag_key_invalidate(struct ip_frag_key * key)
+{
+ key->key_len = 0;
+}
-#define RTE_IP_FRAG_ASSERT(exp) do { } while (0)
+/* compare two keys */
+static inline uint64_t
+ip_frag_key_cmp(const struct ip_frag_key * k1, const struct ip_frag_key * k2)
+{
+ uint32_t i;
+ uint64_t val;
+ val = k1->id_key_len ^ k2->id_key_len;
+ for (i = 0; i < k1->key_len; i++)
+ val |= k1->src_dst[i] ^ k2->src_dst[i];
+ return val;
+}
-#endif /*RTE_IP_FRAG_DEBUG*/
+/*
+ * misc fragment functions
+ */
+
+/* put fragment on death row */
+static inline void
+ip_frag_free(struct ip_frag_pkt *fp, struct rte_ip_frag_death_row *dr)
+{
+ uint32_t i, k;
+
+ k = dr->cnt;
+ for (i = 0; i != fp->last_idx; i++) {
+ if (fp->frags[i].mb != NULL) {
+ dr->row[k++] = fp->frags[i].mb;
+ fp->frags[i].mb = NULL;
+ }
+ }
+
+ fp->last_idx = 0;
+ dr->cnt = k;
+}
+
+/* delete fragment's mbufs immediately instead of using death row */
+static inline void
+ip_frag_free_immediate(struct ip_frag_pkt *fp)
+{
+ uint32_t i;
+
+ for (i = 0; i < fp->last_idx; i++) {
+ if (fp->frags[i].mb != NULL) {
+ IP_FRAG_LOG(DEBUG, "%s:%d\n"
+ "mbuf: %p, tms: %" PRIu64", key: <%" PRIx64 ", %#x>\n",
+ __func__, __LINE__, fp->frags[i].mb, fp->start,
+ fp->key.src_dst[0], fp->key.id);
+ rte_pktmbuf_free(fp->frags[i].mb);
+ fp->frags[i].mb = NULL;
+ }
+ }
+
+ fp->last_idx = 0;
+}
+
+/* if key is empty, mark key as in use */
+static inline void
+ip_frag_inuse(struct rte_ip_frag_tbl *tbl, const struct ip_frag_pkt *fp)
+{
+ if (ip_frag_key_is_empty(&fp->key)) {
+ TAILQ_REMOVE(&tbl->lru, fp, lru);
+ tbl->use_entries--;
+ }
+}
+
+/* reset the fragment */
+static inline void
+ip_frag_reset(struct ip_frag_pkt *fp, uint64_t tms)
+{
+ static const struct ip_frag zero_frag = {
+ .ofs = 0,
+ .len = 0,
+ .mb = NULL,
+ };
+
+ fp->start = tms;
+ fp->total_size = UINT32_MAX;
+ fp->frag_size = 0;
+ fp->last_idx = IP_MIN_FRAG_NUM;
+ fp->frags[IP_LAST_FRAG_IDX] = zero_frag;
+ fp->frags[IP_FIRST_FRAG_IDX] = zero_frag;
+}
+
+/* local frag table helper functions */
+static inline void
+ip_frag_tbl_del(struct rte_ip_frag_tbl *tbl, struct rte_ip_frag_death_row *dr,
+ struct ip_frag_pkt *fp)
+{
+ ip_frag_free(fp, dr);
+ ip_frag_key_invalidate(&fp->key);
+ TAILQ_REMOVE(&tbl->lru, fp, lru);
+ tbl->use_entries--;
+ IP_FRAG_TBL_STAT_UPDATE(&tbl->stat, del_num, 1);
+}
-#endif
+#endif /* _IP_FRAG_COMMON_H_ */
git.droids-corp.org / dpdk.git / blobdiff