-/*-
- * 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.
- *
+/* SPDX-License-Identifier: BSD-3-Clause
+ * Copyright(c) 2010-2014 Intel Corporation
*/
#include <string.h>
#include <errno.h>
#include <stdarg.h>
#include <stdio.h>
-#include <errno.h>
#include <sys/queue.h>
#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_string_fns.h>
#include <rte_errno.h>
+#include <rte_rwlock.h>
+#include <rte_spinlock.h>
+#include <rte_tailq.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 {
/*
* Converts given depth value to its corresponding range value.
*/
-static inline uint32_t __attribute__((pure))
+static uint32_t __attribute__((pure))
depth_to_range(uint8_t depth)
{
VERIFY_DEPTH(depth);
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);
- TAILQ_FOREACH(l, lpm_list, next) {
+ rte_mcfg_tailq_read_lock();
+ TAILQ_FOREACH(te, lpm_list, next) {
+ l = te->data;
if (strncmp(name, l->name, RTE_LPM_NAMESIZE) == 0)
break;
}
+ rte_mcfg_tailq_read_unlock();
- if (l == NULL)
+ if (te == NULL) {
rte_errno = ENOENT;
+ return NULL;
+ }
return l;
}
* Allocates memory for LPM object
*/
struct rte_lpm *
-rte_lpm_create(const char *name, int socket_id, int max_rules,
- __rte_unused int flags)
+rte_lpm_create(const char *name, int socket_id,
+ const struct rte_lpm_config *config)
{
char mem_name[RTE_LPM_NAMESIZE];
struct rte_lpm *lpm = NULL;
- uint32_t mem_size;
+ struct rte_tailq_entry *te;
+ uint32_t mem_size, rules_size, tbl8s_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);
+ RTE_BUILD_BUG_ON(sizeof(struct rte_lpm_tbl_entry) != 4);
/* Check user arguments. */
- if ((name == NULL) || (socket_id < -1) || (max_rules == 0)){
+ if ((name == NULL) || (socket_id < -1) || (config->max_rules == 0)
+ || config->number_tbl8s > RTE_LPM_MAX_TBL8_NUM_GROUPS) {
rte_errno = EINVAL;
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);
+ mem_size = sizeof(*lpm);
+ rules_size = sizeof(struct rte_lpm_rule) * config->max_rules;
+ tbl8s_size = (sizeof(struct rte_lpm_tbl_entry) *
+ RTE_LPM_TBL8_GROUP_NUM_ENTRIES * config->number_tbl8s);
+
+ rte_mcfg_tailq_write_lock();
/* guarantee there's no existing */
- TAILQ_FOREACH(lpm, lpm_list, next) {
+ TAILQ_FOREACH(te, lpm_list, next) {
+ lpm = te->data;
if (strncmp(name, lpm->name, RTE_LPM_NAMESIZE) == 0)
break;
}
- if (lpm != NULL)
- return NULL;
+
+ if (te != NULL) {
+ lpm = NULL;
+ rte_errno = EEXIST;
+ 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");
+ rte_errno = ENOMEM;
+ goto exit;
+ }
/* Allocate memory to store the LPM data structures. */
- lpm = (struct rte_lpm *)rte_zmalloc(mem_name, mem_size,
- CACHE_LINE_SIZE);
+ lpm = rte_zmalloc_socket(mem_name, mem_size,
+ RTE_CACHE_LINE_SIZE, socket_id);
if (lpm == NULL) {
RTE_LOG(ERR, LPM, "LPM memory allocation failed\n");
- return NULL;
+ rte_free(te);
+ rte_errno = ENOMEM;
+ goto exit;
+ }
+
+ lpm->rules_tbl = rte_zmalloc_socket(NULL,
+ (size_t)rules_size, RTE_CACHE_LINE_SIZE, socket_id);
+
+ if (lpm->rules_tbl == NULL) {
+ RTE_LOG(ERR, LPM, "LPM rules_tbl memory allocation failed\n");
+ rte_free(lpm);
+ lpm = NULL;
+ rte_free(te);
+ rte_errno = ENOMEM;
+ goto exit;
+ }
+
+ lpm->tbl8 = rte_zmalloc_socket(NULL,
+ (size_t)tbl8s_size, RTE_CACHE_LINE_SIZE, socket_id);
+
+ if (lpm->tbl8 == NULL) {
+ RTE_LOG(ERR, LPM, "LPM tbl8 memory allocation failed\n");
+ rte_free(lpm->rules_tbl);
+ rte_free(lpm);
+ lpm = NULL;
+ rte_free(te);
+ rte_errno = ENOMEM;
+ 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 = config->max_rules;
+ lpm->number_tbl8s = config->number_tbl8s;
+ strlcpy(lpm->name, name, sizeof(lpm->name));
+
+ te->data = lpm;
- TAILQ_INSERT_TAIL(lpm_list, lpm, next);
+ TAILQ_INSERT_TAIL(lpm_list, te, next);
+
+exit:
+ rte_mcfg_tailq_write_unlock();
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_mcfg_tailq_write_lock();
+
+ /* find our tailq entry */
+ TAILQ_FOREACH(te, lpm_list, next) {
+ if (te->data == (void *) lpm)
+ break;
+ }
+ if (te != NULL)
+ TAILQ_REMOVE(lpm_list, te, next);
+
+ rte_mcfg_tailq_write_unlock();
+
+ rte_free(lpm->tbl8);
+ rte_free(lpm->rules_tbl);
rte_free(lpm);
+ rte_free(te);
}
/*
* are stored in the rule table from 0 - 31.
* NOTE: Valid range for depth parameter is 1 .. 32 inclusive.
*/
-static inline int32_t
+static int32_t
rule_add(struct rte_lpm *lpm, uint32_t ip_masked, uint8_t depth,
- uint8_t next_hop)
+ uint32_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 = rule_gindex; 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;
}
* Delete a rule from the rule table.
* NOTE: Valid range for depth parameter is 1 .. 32 inclusive.
*/
-static inline void
+static 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.
* NOTE: Valid range for depth parameter is 1 .. 32 inclusive.
*/
-static inline int32_t
+static int32_t
rule_find(struct rte_lpm *lpm, uint32_t ip_masked, uint8_t depth)
{
uint32_t rule_gindex, last_rule, rule_index;
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;
}
/*
* Find, clean and allocate a tbl8.
*/
-static inline int32_t
-tbl8_alloc(struct rte_lpm_tbl8_entry *tbl8)
+static int32_t
+tbl8_alloc(struct rte_lpm_tbl_entry *tbl8, uint32_t number_tbl8s)
{
- uint32_t tbl8_gindex; /* tbl8 group index. */
- struct rte_lpm_tbl8_entry *tbl8_entry;
+ uint32_t group_idx; /* tbl8 group index. */
+ struct rte_lpm_tbl_entry *tbl8_entry;
/* Scan through tbl8 to find a free (i.e. INVALID) tbl8 group. */
- for (tbl8_gindex = 0; tbl8_gindex < RTE_LPM_TBL8_NUM_GROUPS;
- tbl8_gindex++) {
- tbl8_entry = &tbl8[tbl8_gindex *
- RTE_LPM_TBL8_GROUP_NUM_ENTRIES];
+ for (group_idx = 0; group_idx < number_tbl8s; group_idx++) {
+ tbl8_entry = &tbl8[group_idx * RTE_LPM_TBL8_GROUP_NUM_ENTRIES];
/* If a free tbl8 group is found clean it and set as VALID. */
if (!tbl8_entry->valid_group) {
+ struct rte_lpm_tbl_entry new_tbl8_entry = {
+ .next_hop = 0,
+ .valid = INVALID,
+ .depth = 0,
+ .valid_group = VALID,
+ };
+
memset(&tbl8_entry[0], 0,
RTE_LPM_TBL8_GROUP_NUM_ENTRIES *
sizeof(tbl8_entry[0]));
- tbl8_entry->valid_group = VALID;
+ __atomic_store(tbl8_entry, &new_tbl8_entry,
+ __ATOMIC_RELAXED);
/* Return group index for allocated tbl8 group. */
- return tbl8_gindex;
+ return group_idx;
}
}
return -ENOSPC;
}
-static inline void
-tbl8_free(struct rte_lpm_tbl8_entry *tbl8, uint32_t tbl8_group_start)
+static void
+tbl8_free(struct rte_lpm_tbl_entry *tbl8, uint32_t tbl8_group_start)
{
/* Set tbl8 group invalid*/
- tbl8[tbl8_group_start].valid_group = INVALID;
+ struct rte_lpm_tbl_entry zero_tbl8_entry = {0};
+
+ __atomic_store(&tbl8[tbl8_group_start], &zero_tbl8_entry,
+ __ATOMIC_RELAXED);
}
-static inline int32_t
+static __rte_noinline int32_t
add_depth_small(struct rte_lpm *lpm, uint32_t ip, uint8_t depth,
- uint8_t next_hop)
+ uint32_t next_hop)
{
+#define group_idx next_hop
uint32_t tbl24_index, tbl24_range, tbl8_index, tbl8_group_end, i, j;
/* Calculate the index into Table24. */
* For invalid OR valid and non-extended tbl 24 entries set
* entry.
*/
- if (!lpm->tbl24[i].valid || (lpm->tbl24[i].ext_entry == 0 &&
+ if (!lpm->tbl24[i].valid || (lpm->tbl24[i].valid_group == 0 &&
lpm->tbl24[i].depth <= depth)) {
- struct rte_lpm_tbl24_entry new_tbl24_entry = {
+ struct rte_lpm_tbl_entry new_tbl24_entry = {
+ .next_hop = next_hop,
.valid = VALID,
- .ext_entry = 0,
+ .valid_group = 0,
.depth = depth,
- { .next_hop = next_hop, }
};
/* Setting tbl24 entry in one go to avoid race
- * conditions */
- lpm->tbl24[i] = new_tbl24_entry;
+ * conditions
+ */
+ __atomic_store(&lpm->tbl24[i], &new_tbl24_entry,
+ __ATOMIC_RELEASE);
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].valid_group == 1) {
+ /* If tbl24 entry is valid and extended calculate the
+ * index into tbl8.
+ */
+ tbl8_index = lpm->tbl24[i].group_idx *
+ 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_tbl_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
+ */
+ __atomic_store(&lpm->tbl8[j],
+ &new_tbl8_entry,
+ __ATOMIC_RELAXED);
+
+ continue;
+ }
}
}
}
-
+#undef group_idx
return 0;
}
-static inline int32_t
+static __rte_noinline int32_t
add_depth_big(struct rte_lpm *lpm, uint32_t ip_masked, uint8_t depth,
- uint8_t next_hop)
+ uint32_t next_hop)
{
+#define group_idx next_hop
uint32_t tbl24_index;
int32_t tbl8_group_index, tbl8_group_start, tbl8_group_end, tbl8_index,
tbl8_range, i;
if (!lpm->tbl24[tbl24_index].valid) {
/* Search for a free tbl8 group. */
- tbl8_group_index = tbl8_alloc(lpm->tbl8);
+ tbl8_group_index = tbl8_alloc(lpm->tbl8, lpm->number_tbl8s);
/* Check tbl8 allocation was successful. */
if (tbl8_group_index < 0) {
/* Set tbl8 entry. */
for (i = tbl8_index; i < (tbl8_index + tbl8_range); i++) {
- lpm->tbl8[i].depth = depth;
- lpm->tbl8[i].next_hop = next_hop;
- lpm->tbl8[i].valid = VALID;
+ struct rte_lpm_tbl_entry new_tbl8_entry = {
+ .valid = VALID,
+ .depth = depth,
+ .valid_group = lpm->tbl8[i].valid_group,
+ .next_hop = next_hop,
+ };
+ __atomic_store(&lpm->tbl8[i], &new_tbl8_entry,
+ __ATOMIC_RELAXED);
}
/*
* so assign whole structure in one go
*/
- struct rte_lpm_tbl24_entry new_tbl24_entry = {
+ struct rte_lpm_tbl_entry new_tbl24_entry = {
+ .group_idx = tbl8_group_index,
.valid = VALID,
- .ext_entry = 1,
+ .valid_group = 1,
.depth = 0,
- { .tbl8_gindex = (uint8_t)tbl8_group_index, }
};
- lpm->tbl24[tbl24_index] = new_tbl24_entry;
+ /* The tbl24 entry must be written only after the
+ * tbl8 entries are written.
+ */
+ __atomic_store(&lpm->tbl24[tbl24_index], &new_tbl24_entry,
+ __ATOMIC_RELEASE);
- }/* If valid entry but not extended calculate the index into Table8. */
- else if (lpm->tbl24[tbl24_index].ext_entry == 0) {
+ } /* If valid entry but not extended calculate the index into Table8. */
+ else if (lpm->tbl24[tbl24_index].valid_group == 0) {
/* Search for free tbl8 group. */
- tbl8_group_index = tbl8_alloc(lpm->tbl8);
+ tbl8_group_index = tbl8_alloc(lpm->tbl8, lpm->number_tbl8s);
if (tbl8_group_index < 0) {
return tbl8_group_index;
/* Populate new tbl8 with tbl24 value. */
for (i = tbl8_group_start; i < tbl8_group_end; i++) {
- lpm->tbl8[i].valid = VALID;
- lpm->tbl8[i].depth = lpm->tbl24[tbl24_index].depth;
- lpm->tbl8[i].next_hop =
- lpm->tbl24[tbl24_index].next_hop;
+ struct rte_lpm_tbl_entry new_tbl8_entry = {
+ .valid = VALID,
+ .depth = lpm->tbl24[tbl24_index].depth,
+ .valid_group = lpm->tbl8[i].valid_group,
+ .next_hop = lpm->tbl24[tbl24_index].next_hop,
+ };
+ __atomic_store(&lpm->tbl8[i], &new_tbl8_entry,
+ __ATOMIC_RELAXED);
}
tbl8_index = tbl8_group_start + (ip_masked & 0xFF);
/* Insert new rule into the tbl8 entry. */
for (i = tbl8_index; i < tbl8_index + tbl8_range; i++) {
- if (!lpm->tbl8[i].valid ||
- lpm->tbl8[i].depth <= depth) {
- lpm->tbl8[i].valid = VALID;
- lpm->tbl8[i].depth = depth;
- lpm->tbl8[i].next_hop = next_hop;
-
- continue;
- }
+ struct rte_lpm_tbl_entry new_tbl8_entry = {
+ .valid = VALID,
+ .depth = depth,
+ .valid_group = lpm->tbl8[i].valid_group,
+ .next_hop = next_hop,
+ };
+ __atomic_store(&lpm->tbl8[i], &new_tbl8_entry,
+ __ATOMIC_RELAXED);
}
/*
* so assign whole structure in one go.
*/
- struct rte_lpm_tbl24_entry new_tbl24_entry = {
+ struct rte_lpm_tbl_entry new_tbl24_entry = {
+ .group_idx = tbl8_group_index,
.valid = VALID,
- .ext_entry = 1,
+ .valid_group = 1,
.depth = 0,
- { .tbl8_gindex = (uint8_t)tbl8_group_index, }
};
- lpm->tbl24[tbl24_index] = new_tbl24_entry;
+ /* The tbl24 entry must be written only after the
+ * tbl8 entries are written.
+ */
+ __atomic_store(&lpm->tbl24[tbl24_index], &new_tbl24_entry,
+ __ATOMIC_RELEASE);
- }
- else { /*
+ } else { /*
* If it is valid, extended entry calculate the index into tbl8.
*/
- tbl8_group_index = lpm->tbl24[tbl24_index].tbl8_gindex;
+ tbl8_group_index = lpm->tbl24[tbl24_index].group_idx;
tbl8_group_start = tbl8_group_index *
RTE_LPM_TBL8_GROUP_NUM_ENTRIES;
tbl8_index = tbl8_group_start + (ip_masked & 0xFF);
if (!lpm->tbl8[i].valid ||
lpm->tbl8[i].depth <= depth) {
- struct rte_lpm_tbl8_entry new_tbl8_entry = {
+ struct rte_lpm_tbl_entry new_tbl8_entry = {
.valid = VALID,
.depth = depth,
.next_hop = next_hop,
+ .valid_group = lpm->tbl8[i].valid_group,
};
/*
* Setting tbl8 entry in one go to avoid race
* condition
*/
- lpm->tbl8[i] = new_tbl8_entry;
+ __atomic_store(&lpm->tbl8[i], &new_tbl8_entry,
+ __ATOMIC_RELAXED);
continue;
}
}
}
-
+#undef group_idx
return 0;
}
*/
int
rte_lpm_add(struct rte_lpm *lpm, uint32_t ip, uint8_t depth,
- uint8_t next_hop)
+ uint32_t next_hop)
{
int32_t rule_index, status = 0;
uint32_t ip_masked;
if (depth <= MAX_DEPTH_TBL24) {
status = add_depth_small(lpm, ip_masked, depth, next_hop);
- }
- else { /* If depth > RTE_LPM_MAX_DEPTH_TBL24 */
+ } else { /* If depth > RTE_LPM_MAX_DEPTH_TBL24 */
status = add_depth_big(lpm, ip_masked, depth, next_hop);
/*
return 0;
}
-static inline int32_t
-find_previous_rule(struct rte_lpm *lpm, uint32_t ip, uint8_t depth)
+/*
+ * 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,
+uint32_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 int32_t
+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
+static 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)
{
+#define group_idx next_hop
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);
tbl24_index = (ip_masked >> 8);
+ struct rte_lpm_tbl_entry zero_tbl24_entry = {0};
/*
* Firstly check the sub_rule_index. A -1 indicates no replacement rule
* 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 {
+
+ if (lpm->tbl24[i].valid_group == 0 &&
+ lpm->tbl24[i].depth <= depth) {
+ __atomic_store(&lpm->tbl24[i],
+ &zero_tbl24_entry, __ATOMIC_RELEASE);
+ } else if (lpm->tbl24[i].valid_group == 1) {
/*
* If TBL24 entry is extended, then there has
* to be a rule with depth >= 25 in the
* associated TBL8 group.
*/
- tbl8_group_index = lpm->tbl24[i].tbl8_gindex;
+ tbl8_group_index = lpm->tbl24[i].group_idx;
tbl8_index = tbl8_group_index *
RTE_LPM_TBL8_GROUP_NUM_ENTRIES;
}
}
}
- }
- else {
+ } else {
/*
* If a replacement rule exists then modify entries
* 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 = {
+ struct rte_lpm_tbl_entry new_tbl24_entry = {
+ .next_hop = lpm->rules_tbl[sub_rule_index].next_hop,
.valid = VALID,
- .ext_entry = 0,
- .depth = new_depth,
- {.next_hop = lpm->rules_tbl[sub_rule_index].next_hop,}
+ .valid_group = 0,
+ .depth = sub_rule_depth,
};
- struct rte_lpm_tbl8_entry new_tbl8_entry = {
+ struct rte_lpm_tbl_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,
};
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] = new_tbl24_entry;
- }
- else {
+ if (lpm->tbl24[i].valid_group == 0 &&
+ lpm->tbl24[i].depth <= depth) {
+ __atomic_store(&lpm->tbl24[i], &new_tbl24_entry,
+ __ATOMIC_RELEASE);
+ } else if (lpm->tbl24[i].valid_group == 1) {
/*
* If TBL24 entry is extended, then there has
* to be a rule with depth >= 25 in the
* associated TBL8 group.
*/
- tbl8_group_index = lpm->tbl24[i].tbl8_gindex;
+ tbl8_group_index = lpm->tbl24[i].group_idx;
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++) {
if (lpm->tbl8[j].depth <= depth)
- lpm->tbl8[j] = new_tbl8_entry;
+ __atomic_store(&lpm->tbl8[j],
+ &new_tbl8_entry,
+ __ATOMIC_RELAXED);
}
}
}
}
-
+#undef group_idx
return 0;
}
* Return of value > -1 means tbl8 is in use but has all the same values and
* thus can be recycled
*/
-static inline int32_t
-tbl8_recycle_check(struct rte_lpm_tbl8_entry *tbl8, uint32_t tbl8_group_start)
+static int32_t
+tbl8_recycle_check(struct rte_lpm_tbl_entry *tbl8,
+ uint32_t tbl8_group_start)
{
uint32_t tbl8_group_end, i;
tbl8_group_end = tbl8_group_start + RTE_LPM_TBL8_GROUP_NUM_ENTRIES;
* and if so check the rest of the entries to verify that they
* are all of this depth.
*/
- if (tbl8[tbl8_group_start].depth < MAX_DEPTH_TBL24) {
+ if (tbl8[tbl8_group_start].depth <= MAX_DEPTH_TBL24) {
for (i = (tbl8_group_start + 1); i < tbl8_group_end;
i++) {
return -EINVAL;
}
-static inline int32_t
+static 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)
{
+#define group_idx next_hop
uint32_t tbl24_index, tbl8_group_index, tbl8_group_start, tbl8_index,
tbl8_range, i;
- uint8_t new_depth;
int32_t tbl8_recycle_index;
/*
tbl24_index = ip_masked >> 8;
/* Calculate the index into tbl8 and range. */
- tbl8_group_index = lpm->tbl24[tbl24_index].tbl8_gindex;
+ tbl8_group_index = lpm->tbl24[tbl24_index].group_idx;
tbl8_group_start = tbl8_group_index * RTE_LPM_TBL8_GROUP_NUM_ENTRIES;
tbl8_index = tbl8_group_start + (ip_masked & 0xFF);
tbl8_range = depth_to_range(depth);
if (lpm->tbl8[i].depth <= depth)
lpm->tbl8[i].valid = INVALID;
}
- }
- else {
- new_depth = (uint8_t)(sub_rule_index /
- lpm->max_rules_per_depth);
-
+ } else {
/* Set new tbl8 entry. */
- struct rte_lpm_tbl8_entry new_tbl8_entry = {
+ struct rte_lpm_tbl_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,
};
*/
for (i = tbl8_index; i < (tbl8_index + tbl8_range); i++) {
if (lpm->tbl8[i].depth <= depth)
- lpm->tbl8[i] = new_tbl8_entry;
+ __atomic_store(&lpm->tbl8[i], &new_tbl8_entry,
+ __ATOMIC_RELAXED);
}
}
tbl8_recycle_index = tbl8_recycle_check(lpm->tbl8, tbl8_group_start);
- if (tbl8_recycle_index == -EINVAL){
- /* Set tbl24 before freeing tbl8 to avoid race condition. */
+ if (tbl8_recycle_index == -EINVAL) {
+ /* Set tbl24 before freeing tbl8 to avoid race condition.
+ * Prevent the free of the tbl8 group from hoisting.
+ */
lpm->tbl24[tbl24_index].valid = 0;
+ __atomic_thread_fence(__ATOMIC_RELEASE);
tbl8_free(lpm->tbl8, tbl8_group_start);
- }
- else if (tbl8_recycle_index > -1) {
+ } else if (tbl8_recycle_index > -1) {
/* Update tbl24 entry. */
- struct rte_lpm_tbl24_entry new_tbl24_entry = {
+ struct rte_lpm_tbl_entry new_tbl24_entry = {
+ .next_hop = lpm->tbl8[tbl8_recycle_index].next_hop,
.valid = VALID,
- .ext_entry = 0,
+ .valid_group = 0,
.depth = lpm->tbl8[tbl8_recycle_index].depth,
- { .next_hop = lpm->tbl8[tbl8_recycle_index].next_hop, }
};
- /* Set tbl24 before freeing tbl8 to avoid race condition. */
- lpm->tbl24[tbl24_index] = new_tbl24_entry;
+ /* Set tbl24 before freeing tbl8 to avoid race condition.
+ * Prevent the free of the tbl8 group from hoisting.
+ */
+ __atomic_store(&lpm->tbl24[tbl24_index], &new_tbl24_entry,
+ __ATOMIC_RELAXED);
+ __atomic_thread_fence(__ATOMIC_RELEASE);
tbl8_free(lpm->tbl8, tbl8_group_start);
}
-
+#undef group_idx
return 0;
}
{
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);
- }
- else { /* If depth > MAX_DEPTH_TBL24 */
- return delete_depth_big(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,
+ 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));
/* Zero tbl8. */
- memset(lpm->tbl8, 0, sizeof(lpm->tbl8));
+ memset(lpm->tbl8, 0, sizeof(lpm->tbl8[0])
+ * RTE_LPM_TBL8_GROUP_NUM_ENTRIES * lpm->number_tbl8s);
/* 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