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From: Anatoly Burakov <anatoly.burakov@intel.com>
To: dev@dpdk.org
Date: Fri, 20 Jun 2014 16:42:23 +0100
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Subject: [dpdk-dev] [PATCH 08/10] rte_lpm: make lpm tailq fully local
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Signed-off-by: Anatoly Burakov <anatoly.burakov@intel.com>
---
lib/librte_lpm/rte_lpm.c | 65 ++++++++++++++++++++++++++++++++++++++++--------
lib/librte_lpm/rte_lpm.h | 2 --
2 files changed, 54 insertions(+), 13 deletions(-)
diff --git a/lib/librte_lpm/rte_lpm.c b/lib/librte_lpm/rte_lpm.c
index 35209c3..1ee4e96 100644
--- a/lib/librte_lpm/rte_lpm.c
+++ b/lib/librte_lpm/rte_lpm.c
@@ -56,7 +56,7 @@
#include "rte_lpm.h"
-TAILQ_HEAD(rte_lpm_list, rte_lpm);
+TAILQ_HEAD(rte_lpm_list, rte_tailq_entry);
#define MAX_DEPTH_TBL24 24
@@ -118,24 +118,29 @@ depth_to_range(uint8_t 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) {
+ 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;
}
@@ -149,12 +154,13 @@ rte_lpm_create(const char *name, int socket_id, int max_rules,
{
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;
}
@@ -176,18 +182,27 @@ rte_lpm_create(const char *name, int socket_id, int 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);
if (lpm == NULL) {
RTE_LOG(ERR, LPM, "LPM memory allocation failed\n");
+ rte_free(te);
goto exit;
}
@@ -195,7 +210,9 @@ rte_lpm_create(const char *name, int socket_id, int max_rules,
lpm->max_rules = max_rules;
rte_snprintf(lpm->name, sizeof(lpm->name), "%s", name);
- TAILQ_INSERT_TAIL(lpm_list, lpm, next);
+ te->data = (void *) lpm;
+
+ TAILQ_INSERT_TAIL(lpm_list, te, next);
exit:
rte_rwlock_write_unlock(RTE_EAL_TAILQ_RWLOCK);
@@ -209,12 +226,38 @@ exit:
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);
}
/*
diff --git a/lib/librte_lpm/rte_lpm.h b/lib/librte_lpm/rte_lpm.h
index 840d871..62d7736 100644
--- a/lib/librte_lpm/rte_lpm.h
+++ b/lib/librte_lpm/rte_lpm.h
@@ -132,8 +132,6 @@ struct rte_lpm_rule_info {
/** @internal LPM structure. */
struct rte_lpm {
- TAILQ_ENTRY(rte_lpm) next; /**< Next in list. */
-
/* LPM metadata. */
char name[RTE_LPM_NAMESIZE]; /**< Name of the lpm. */
int mem_location; /**< @deprecated @see RTE_LPM_HEAP and RTE_LPM_MEMZONE. */
--
1.8.1.4