/*-
* 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
* * 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
#include <rte_log.h>
#include <rte_branch_prediction.h>
#include <rte_common.h>
-#include <rte_memory.h> /* for definition of CACHE_LINE_SIZE */
+#include <rte_memory.h> /* for definition of RTE_CACHE_LINE_SIZE */
#include <rte_malloc.h>
#include <rte_memzone.h>
-#include <rte_tailq.h>
#include <rte_eal.h>
#include <rte_eal_memconfig.h>
#include <rte_per_lcore.h>
#include "rte_lpm.h"
-TAILQ_HEAD(rte_lpm_list, rte_lpm);
-
+TAILQ_HEAD(rte_lpm_list, rte_tailq_entry);
+
#define MAX_DEPTH_TBL24 24
enum valid_flag {
struct rte_lpm *
rte_lpm_find_existing(const char *name)
{
- struct rte_lpm *l;
+ struct rte_lpm *l = NULL;
+ struct rte_tailq_entry *te;
struct rte_lpm_list *lpm_list;
/* check that we have an initialised tail queue */
- if ((lpm_list = RTE_TAILQ_LOOKUP_BY_IDX(RTE_TAILQ_LPM, rte_lpm_list)) == NULL) {
+ if ((lpm_list = RTE_TAILQ_LOOKUP_BY_IDX(RTE_TAILQ_LPM,
+ rte_lpm_list)) == NULL) {
rte_errno = E_RTE_NO_TAILQ;
return NULL;
}
rte_rwlock_read_lock(RTE_EAL_TAILQ_RWLOCK);
- TAILQ_FOREACH(l, lpm_list, next) {
+ TAILQ_FOREACH(te, lpm_list, next) {
+ l = (struct rte_lpm *) te->data;
if (strncmp(name, l->name, RTE_LPM_NAMESIZE) == 0)
break;
}
rte_rwlock_read_unlock(RTE_EAL_TAILQ_RWLOCK);
- if (l == NULL)
+ if (te == NULL) {
rte_errno = ENOENT;
+ return NULL;
+ }
return l;
}
{
char mem_name[RTE_LPM_NAMESIZE];
struct rte_lpm *lpm = NULL;
+ struct rte_tailq_entry *te;
uint32_t mem_size;
struct rte_lpm_list *lpm_list;
/* check that we have an initialised tail queue */
- if ((lpm_list =
- RTE_TAILQ_LOOKUP_BY_IDX(RTE_TAILQ_LPM, rte_lpm_list)) == NULL) {
+ if ((lpm_list = RTE_TAILQ_LOOKUP_BY_IDX(RTE_TAILQ_LPM,
+ rte_lpm_list)) == NULL) {
rte_errno = E_RTE_NO_TAILQ;
- return NULL;
+ return NULL;
}
RTE_BUILD_BUG_ON(sizeof(struct rte_lpm_tbl24_entry) != 2);
return NULL;
}
- rte_snprintf(mem_name, sizeof(mem_name), "LPM_%s", name);
+ snprintf(mem_name, sizeof(mem_name), "LPM_%s", name);
/* Determine the amount of memory to allocate. */
mem_size = sizeof(*lpm) + (sizeof(lpm->rules_tbl[0]) * max_rules);
rte_rwlock_write_lock(RTE_EAL_TAILQ_RWLOCK);
/* guarantee there's no existing */
- TAILQ_FOREACH(lpm, lpm_list, next) {
+ TAILQ_FOREACH(te, lpm_list, next) {
+ lpm = (struct rte_lpm *) te->data;
if (strncmp(name, lpm->name, RTE_LPM_NAMESIZE) == 0)
break;
}
- if (lpm != NULL)
+ if (te != NULL)
goto exit;
+ /* allocate tailq entry */
+ te = rte_zmalloc("LPM_TAILQ_ENTRY", sizeof(*te), 0);
+ if (te == NULL) {
+ RTE_LOG(ERR, LPM, "Failed to allocate tailq entry\n");
+ goto exit;
+ }
+
/* Allocate memory to store the LPM data structures. */
lpm = (struct rte_lpm *)rte_zmalloc_socket(mem_name, mem_size,
- CACHE_LINE_SIZE, socket_id);
+ RTE_CACHE_LINE_SIZE, socket_id);
if (lpm == NULL) {
RTE_LOG(ERR, LPM, "LPM memory allocation failed\n");
+ rte_free(te);
goto exit;
}
/* Save user arguments. */
lpm->max_rules = max_rules;
- rte_snprintf(lpm->name, sizeof(lpm->name), "%s", name);
+ snprintf(lpm->name, sizeof(lpm->name), "%s", name);
+
+ te->data = (void *) lpm;
- TAILQ_INSERT_TAIL(lpm_list, lpm, next);
+ TAILQ_INSERT_TAIL(lpm_list, te, next);
-exit:
+exit:
rte_rwlock_write_unlock(RTE_EAL_TAILQ_RWLOCK);
return lpm;
void
rte_lpm_free(struct rte_lpm *lpm)
{
+ struct rte_lpm_list *lpm_list;
+ struct rte_tailq_entry *te;
+
/* Check user arguments. */
if (lpm == NULL)
return;
- RTE_EAL_TAILQ_REMOVE(RTE_TAILQ_LPM, rte_lpm_list, lpm);
+ /* check that we have an initialised tail queue */
+ if ((lpm_list =
+ RTE_TAILQ_LOOKUP_BY_IDX(RTE_TAILQ_LPM, rte_lpm_list)) == NULL) {
+ rte_errno = E_RTE_NO_TAILQ;
+ return;
+ }
+
+ rte_rwlock_write_lock(RTE_EAL_TAILQ_RWLOCK);
+
+ /* find our tailq entry */
+ TAILQ_FOREACH(te, lpm_list, next) {
+ if (te->data == (void *) lpm)
+ break;
+ }
+ if (te == NULL) {
+ rte_rwlock_write_unlock(RTE_EAL_TAILQ_RWLOCK);
+ return;
+ }
+
+ TAILQ_REMOVE(lpm_list, te, next);
+
+ rte_rwlock_write_unlock(RTE_EAL_TAILQ_RWLOCK);
+
rte_free(lpm);
+ rte_free(te);
}
/*
/* If rule already exists update its next_hop and return. */
if (lpm->rules_tbl[rule_index].ip == ip_masked) {
lpm->rules_tbl[rule_index].next_hop = next_hop;
-
+
return rule_index;
}
}
+
+ if (rule_index == lpm->max_rules)
+ return -ENOSPC;
} else {
/* Calculate the position in which the rule will be stored. */
rule_index = 0;
/* If tbl24 entry is valid and extended calculate the index
* into tbl8. */
- tbl8_index = lpm->tbl24[i].tbl8_gindex *
+ tbl8_index = lpm->tbl24[i].tbl8_gindex *
RTE_LPM_TBL8_GROUP_NUM_ENTRIES;
tbl8_group_end = tbl8_index + RTE_LPM_TBL8_GROUP_NUM_ENTRIES;
return 0;
}
+/*
+ * Look for a rule in the high-level rules table
+ */
+int
+rte_lpm_is_rule_present(struct rte_lpm *lpm, uint32_t ip, uint8_t depth,
+uint8_t *next_hop)
+{
+ uint32_t ip_masked;
+ int32_t rule_index;
+
+ /* Check user arguments. */
+ if ((lpm == NULL) ||
+ (next_hop == NULL) ||
+ (depth < 1) || (depth > RTE_LPM_MAX_DEPTH))
+ return -EINVAL;
+
+ /* Look for the rule using rule_find. */
+ ip_masked = ip & depth_to_mask(depth);
+ rule_index = rule_find(lpm, ip_masked, depth);
+
+ if (rule_index >= 0) {
+ *next_hop = lpm->rules_tbl[rule_index].next_hop;
+ return 1;
+ }
+
+ /* If rule is not found return 0. */
+ return 0;
+}
+
static inline int32_t
find_previous_rule(struct rte_lpm *lpm, uint32_t ip, uint8_t depth, uint8_t *sub_rule_depth)
{
* associated with this rule.
*/
for (i = tbl24_index; i < (tbl24_index + tbl24_range); i++) {
-
+
if (lpm->tbl24[i].ext_entry == 0 &&
lpm->tbl24[i].depth <= depth ) {
lpm->tbl24[i].valid = INVALID;
tbl8_group_index = lpm->tbl24[i].tbl8_gindex;
tbl8_index = tbl8_group_index *
RTE_LPM_TBL8_GROUP_NUM_ENTRIES;
-
+
for (j = tbl8_index; j < (tbl8_index +
RTE_LPM_TBL8_GROUP_NUM_ENTRIES); j++) {
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