/*-
* BSD LICENSE
- *
- * Copyright(c) 2010-2013 Intel Corporation. All rights reserved.
+ *
+ * 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);
+
+static struct rte_tailq_elem rte_lpm_tailq = {
+ .name = "RTE_LPM",
+};
+EAL_REGISTER_TAILQ(rte_lpm_tailq)
+
#define MAX_DEPTH_TBL24 24
enum valid_flag {
return 1 << (MAX_DEPTH_TBL24 - depth);
/* Else if depth is greater than 24 */
- return (1 << (RTE_LPM_MAX_DEPTH - depth));
+ return 1 << (RTE_LPM_MAX_DEPTH - depth);
}
/*
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) {
- rte_errno = E_RTE_NO_TAILQ;
- return NULL;
- }
+ lpm_list = RTE_TAILQ_CAST(rte_lpm_tailq.head, rte_lpm_list);
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) {
- rte_errno = E_RTE_NO_TAILQ;
- return NULL;
- }
+ lpm_list = RTE_TAILQ_CAST(rte_lpm_tailq.head, rte_lpm_list);
RTE_BUILD_BUG_ON(sizeof(struct rte_lpm_tbl24_entry) != 2);
RTE_BUILD_BUG_ON(sizeof(struct rte_lpm_tbl8_entry) != 2);
return NULL;
}
- rte_snprintf(mem_name, sizeof(mem_name), "LPM_%s", name);
-
- /*
- * Pad out max_rules so that each depth is given the same number of
- * rules.
- */
- if (max_rules % RTE_LPM_MAX_DEPTH) {
- max_rules += RTE_LPM_MAX_DEPTH -
- (max_rules % RTE_LPM_MAX_DEPTH);
- }
+ 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_per_depth = max_rules / RTE_LPM_MAX_DEPTH;
- rte_snprintf(lpm->name, sizeof(lpm->name), "%s", name);
+ lpm->max_rules = max_rules;
+ 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);
+ lpm_list = RTE_TAILQ_CAST(rte_lpm_tailq.head, rte_lpm_list);
+
+ 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);
}
/*
uint8_t next_hop)
{
uint32_t rule_gindex, rule_index, last_rule;
+ int i;
VERIFY_DEPTH(depth);
- /* rule_gindex stands for rule group index. */
- rule_gindex = ((depth - 1) * lpm->max_rules_per_depth);
- /* Initialise rule_index to point to start of rule group. */
- rule_index = rule_gindex;
- /* Last rule = Last used rule in this rule group. */
- last_rule = rule_gindex + lpm->used_rules_at_depth[depth - 1];
-
/* Scan through rule group to see if rule already exists. */
- for (; rule_index < last_rule; rule_index++) {
+ if (lpm->rule_info[depth - 1].used_rules > 0) {
- /* 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;
+ /* rule_gindex stands for rule group index. */
+ rule_gindex = lpm->rule_info[depth - 1].first_rule;
+ /* Initialise rule_index to point to start of rule group. */
+ rule_index = rule_gindex;
+ /* Last rule = Last used rule in this rule group. */
+ last_rule = rule_gindex + lpm->rule_info[depth - 1].used_rules;
- return rule_index;
+ for (; rule_index < last_rule; rule_index++) {
+
+ /* 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;
+
+ for (i = depth - 1; i > 0; i--) {
+ if (lpm->rule_info[i - 1].used_rules > 0) {
+ rule_index = lpm->rule_info[i - 1].first_rule + lpm->rule_info[i - 1].used_rules;
+ break;
+ }
}
+ if (rule_index == lpm->max_rules)
+ return -ENOSPC;
+
+ lpm->rule_info[depth - 1].first_rule = rule_index;
}
- /*
- * If rule does not exist check if there is space to add a new rule to
- * this rule group. If there is no space return error. */
- if (lpm->used_rules_at_depth[depth - 1] == lpm->max_rules_per_depth) {
- return -ENOSPC;
+ /* Make room for the new rule in the array. */
+ for (i = RTE_LPM_MAX_DEPTH; i > depth; i--) {
+ if (lpm->rule_info[i - 1].first_rule + lpm->rule_info[i - 1].used_rules == lpm->max_rules)
+ return -ENOSPC;
+
+ if (lpm->rule_info[i - 1].used_rules > 0) {
+ lpm->rules_tbl[lpm->rule_info[i - 1].first_rule + lpm->rule_info[i - 1].used_rules]
+ = lpm->rules_tbl[lpm->rule_info[i - 1].first_rule];
+ lpm->rule_info[i - 1].first_rule++;
+ }
}
- /* If there is space for the new rule add it. */
+ /* Add the new rule. */
lpm->rules_tbl[rule_index].ip = ip_masked;
lpm->rules_tbl[rule_index].next_hop = next_hop;
/* Increment the used rules counter for this rule group. */
- lpm->used_rules_at_depth[depth - 1]++;
+ lpm->rule_info[depth - 1].used_rules++;
return rule_index;
}
static inline void
rule_delete(struct rte_lpm *lpm, int32_t rule_index, uint8_t depth)
{
- uint32_t rule_gindex, last_rule_index;
+ int i;
VERIFY_DEPTH(depth);
- rule_gindex = ((depth - 1) * lpm->max_rules_per_depth);
- last_rule_index = rule_gindex +
- (lpm->used_rules_at_depth[depth - 1]) - 1;
- /*
- * Overwrite redundant rule with last rule in group and decrement rule
- * counter.
- */
- lpm->rules_tbl[rule_index] = lpm->rules_tbl[last_rule_index];
- lpm->used_rules_at_depth[depth - 1]--;
-}
+ lpm->rules_tbl[rule_index] = lpm->rules_tbl[lpm->rule_info[depth - 1].first_rule
+ + lpm->rule_info[depth - 1].used_rules - 1];
+
+ for (i = depth; i < RTE_LPM_MAX_DEPTH; i++) {
+ if (lpm->rule_info[i].used_rules > 0) {
+ lpm->rules_tbl[lpm->rule_info[i].first_rule - 1] =
+ lpm->rules_tbl[lpm->rule_info[i].first_rule + lpm->rule_info[i].used_rules - 1];
+ lpm->rule_info[i].first_rule--;
+ }
+ }
+ lpm->rule_info[depth - 1].used_rules--;
+}
/*
* Finds a rule in rule table.
VERIFY_DEPTH(depth);
- rule_gindex = ((depth - 1) * lpm->max_rules_per_depth);
- last_rule = rule_gindex + lpm->used_rules_at_depth[depth - 1];
+ rule_gindex = lpm->rule_info[depth - 1].first_rule;
+ last_rule = rule_gindex + lpm->rule_info[depth - 1].used_rules;
/* Scan used rules at given depth to find rule. */
for (rule_index = rule_gindex; rule_index < last_rule; rule_index++) {
/* If rule is found return the rule index. */
if (lpm->rules_tbl[rule_index].ip == ip_masked)
- return (rule_index);
+ return rule_index;
}
- /* If rule is not found return -E_RTE_NO_TAILQ. */
- return -E_RTE_NO_TAILQ;
+ /* If rule is not found return -EINVAL. */
+ return -EINVAL;
}
/*
};
/* Setting tbl24 entry in one go to avoid race
- * conditions */
+ * conditions
+ */
lpm->tbl24[i] = new_tbl24_entry;
continue;
}
- /* If tbl24 entry is valid and extended calculate the index
- * into tbl8. */
- tbl8_index = lpm->tbl24[tbl24_index].tbl8_gindex *
- RTE_LPM_TBL8_GROUP_NUM_ENTRIES;
- tbl8_group_end = tbl8_index + RTE_LPM_TBL8_GROUP_NUM_ENTRIES;
-
- for (j = tbl8_index; j < tbl8_group_end; j++) {
- if (!lpm->tbl8[j].valid ||
- lpm->tbl8[j].depth <= depth) {
- struct rte_lpm_tbl8_entry new_tbl8_entry = {
- .valid = VALID,
- .valid_group = VALID,
- .depth = depth,
- .next_hop = next_hop,
- };
-
- /*
- * Setting tbl8 entry in one go to avoid race
- * conditions
- */
- lpm->tbl8[j] = new_tbl8_entry;
-
- continue;
+ if (lpm->tbl24[i].ext_entry == 1) {
+ /* If tbl24 entry is valid and extended calculate the
+ * index into tbl8.
+ */
+ tbl8_index = lpm->tbl24[i].tbl8_gindex *
+ RTE_LPM_TBL8_GROUP_NUM_ENTRIES;
+ tbl8_group_end = tbl8_index +
+ RTE_LPM_TBL8_GROUP_NUM_ENTRIES;
+
+ for (j = tbl8_index; j < tbl8_group_end; j++) {
+ if (!lpm->tbl8[j].valid ||
+ lpm->tbl8[j].depth <= depth) {
+ struct rte_lpm_tbl8_entry
+ new_tbl8_entry = {
+ .valid = VALID,
+ .valid_group = VALID,
+ .depth = depth,
+ .next_hop = next_hop,
+ };
+
+ /*
+ * Setting tbl8 entry in one go to avoid
+ * race conditions
+ */
+ lpm->tbl8[j] = new_tbl8_entry;
+
+ continue;
+ }
}
}
}
.valid = VALID,
.depth = depth,
.next_hop = next_hop,
+ .valid_group = lpm->tbl8[i].valid_group,
};
/*
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)
+find_previous_rule(struct rte_lpm *lpm, uint32_t ip, uint8_t depth, uint8_t *sub_rule_depth)
{
int32_t rule_index;
uint32_t ip_masked;
rule_index = rule_find(lpm, ip_masked, prev_depth);
- if (rule_index >= 0)
+ if (rule_index >= 0) {
+ *sub_rule_depth = prev_depth;
return rule_index;
+ }
}
return -1;
static inline int32_t
delete_depth_small(struct rte_lpm *lpm, uint32_t ip_masked,
- uint8_t depth, int32_t sub_rule_index)
+ uint8_t depth, int32_t sub_rule_index, uint8_t sub_rule_depth)
{
uint32_t tbl24_range, tbl24_index, tbl8_group_index, tbl8_index, i, j;
- uint8_t new_depth;
/* Calculate the range and index into Table24. */
tbl24_range = depth_to_range(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;
- }
- else {
+ } else if (lpm->tbl24[i].ext_entry == 1) {
/*
* If TBL24 entry is extended, then there has
* to be a rule with depth >= 25 in the
* associated with this rule.
*/
- /* Calculate depth of sub_rule. */
- new_depth = (uint8_t) (sub_rule_index /
- lpm->max_rules_per_depth);
-
struct rte_lpm_tbl24_entry new_tbl24_entry = {
{.next_hop = lpm->rules_tbl[sub_rule_index].next_hop,},
.valid = VALID,
.ext_entry = 0,
- .depth = new_depth,
+ .depth = sub_rule_depth,
};
struct rte_lpm_tbl8_entry new_tbl8_entry = {
.valid = VALID,
- .depth = new_depth,
+ .valid_group = VALID,
+ .depth = sub_rule_depth,
.next_hop = lpm->rules_tbl
[sub_rule_index].next_hop,
};
if (lpm->tbl24[i].ext_entry == 0 &&
lpm->tbl24[i].depth <= depth ) {
lpm->tbl24[i] = new_tbl24_entry;
- }
- else {
+ } else if (lpm->tbl24[i].ext_entry == 1) {
/*
* If TBL24 entry is extended, then there has
* to be a rule with depth >= 25 in the
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++) {
static inline int32_t
delete_depth_big(struct rte_lpm *lpm, uint32_t ip_masked,
- uint8_t depth, int32_t sub_rule_index)
+ uint8_t depth, int32_t sub_rule_index, uint8_t sub_rule_depth)
{
uint32_t tbl24_index, tbl8_group_index, tbl8_group_start, tbl8_index,
tbl8_range, i;
- uint8_t new_depth;
int32_t tbl8_recycle_index;
/*
}
}
else {
- new_depth = (uint8_t)(sub_rule_index /
- lpm->max_rules_per_depth);
-
/* Set new tbl8 entry. */
struct rte_lpm_tbl8_entry new_tbl8_entry = {
.valid = VALID,
- .depth = new_depth,
+ .depth = sub_rule_depth,
+ .valid_group = lpm->tbl8[tbl8_group_start].valid_group,
.next_hop = lpm->rules_tbl[sub_rule_index].next_hop,
};
{
int32_t rule_to_delete_index, sub_rule_index;
uint32_t ip_masked;
+ uint8_t sub_rule_depth;
/*
* Check input arguments. Note: IP must be a positive integer of 32
* bits in length therefore it need not be checked.
/*
* Check if rule_to_delete_index was found. If no rule was found the
- * function rule_find returns -E_RTE_NO_TAILQ.
+ * function rule_find returns -EINVAL.
*/
if (rule_to_delete_index < 0)
- return -E_RTE_NO_TAILQ;
+ return -EINVAL;
/* Delete the rule from the rule table. */
rule_delete(lpm, rule_to_delete_index, depth);
* replace the rule_to_delete we return -1 and invalidate the table
* entries associated with this rule.
*/
- sub_rule_index = find_previous_rule(lpm, ip, depth);
+ sub_rule_depth = 0;
+ sub_rule_index = find_previous_rule(lpm, ip, depth, &sub_rule_depth);
/*
* If the input depth value is less than 25 use function
*/
if (depth <= MAX_DEPTH_TBL24) {
return delete_depth_small(lpm, ip_masked, depth,
- sub_rule_index);
+ sub_rule_index, sub_rule_depth);
}
else { /* If depth > MAX_DEPTH_TBL24 */
- return delete_depth_big(lpm, ip_masked, depth, sub_rule_index);
+ return delete_depth_big(lpm, ip_masked, depth, sub_rule_index, sub_rule_depth);
}
}
void
rte_lpm_delete_all(struct rte_lpm *lpm)
{
- /* Zero used rules counter. */
- memset(lpm->used_rules_at_depth, 0, sizeof(lpm->used_rules_at_depth));
+ /* Zero rule information. */
+ memset(lpm->rule_info, 0, sizeof(lpm->rule_info));
/* Zero tbl24. */
memset(lpm->tbl24, 0, sizeof(lpm->tbl24));
memset(lpm->tbl8, 0, sizeof(lpm->tbl8));
/* Delete all rules form the rules table. */
- memset(lpm->rules_tbl, 0, sizeof(lpm->rules_tbl[0]) *
- (lpm->max_rules_per_depth * RTE_LPM_MAX_DEPTH));
+ memset(lpm->rules_tbl, 0, sizeof(lpm->rules_tbl[0]) * lpm->max_rules);
}
-
git.droids-corp.org / dpdk.git / blobdiff