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From: Anatoly Burakov <anatoly.burakov@intel.com>
To: dev@dpdk.org
Date: Fri, 20 Jun 2014 16:42:24 +0100
Message-Id: <2063340d9cc84be69683ed300b9c94a8464796ba.1403277437.git.anatoly.burakov@intel.com>
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Subject: [dpdk-dev] [PATCH 09/10] rte_lpm6: make lpm6 tailq fully local
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Signed-off-by: Anatoly Burakov <anatoly.burakov@intel.com>
---
lib/librte_lpm/rte_lpm6.c | 62 ++++++++++++++++++++++++++++++++++++++---------
1 file changed, 51 insertions(+), 11 deletions(-)
diff --git a/lib/librte_lpm/rte_lpm6.c b/lib/librte_lpm/rte_lpm6.c
index 32690cb..8072534 100644
--- a/lib/librte_lpm/rte_lpm6.c
+++ b/lib/librte_lpm/rte_lpm6.c
@@ -77,7 +77,7 @@ enum valid_flag {
VALID
};
-TAILQ_HEAD(rte_lpm6_list, rte_lpm6);
+TAILQ_HEAD(rte_lpm6_list, rte_tailq_entry);
/** Tbl entry structure. It is the same for both tbl24 and tbl8 */
struct rte_lpm6_tbl_entry {
@@ -99,8 +99,6 @@ struct rte_lpm6_rule {
/** LPM6 structure. */
struct rte_lpm6 {
- TAILQ_ENTRY(rte_lpm6) next; /**< Next in list. */
-
/* LPM metadata. */
char name[RTE_LPM6_NAMESIZE]; /**< Name of the lpm. */
uint32_t max_rules; /**< Max number of rules. */
@@ -149,6 +147,7 @@ rte_lpm6_create(const char *name, int socket_id,
{
char mem_name[RTE_LPM6_NAMESIZE];
struct rte_lpm6 *lpm = NULL;
+ struct rte_tailq_entry *te;
uint64_t mem_size, rules_size;
struct rte_lpm6_list *lpm_list;
@@ -179,12 +178,20 @@ rte_lpm6_create(const char *name, int socket_id,
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_lpm6 *) te->data;
if (strncmp(name, lpm->name, RTE_LPM6_NAMESIZE) == 0)
break;
}
- if (lpm != NULL)
+ if (te != NULL)
+ goto exit;
+
+ /* allocate tailq entry */
+ te = rte_zmalloc("LPM6_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_lpm6 *)rte_zmalloc_socket(mem_name, (size_t)mem_size,
@@ -192,6 +199,7 @@ rte_lpm6_create(const char *name, int socket_id,
if (lpm == NULL) {
RTE_LOG(ERR, LPM, "LPM memory allocation failed\n");
+ rte_free(te);
goto exit;
}
@@ -201,6 +209,7 @@ rte_lpm6_create(const char *name, int socket_id,
if (lpm->rules_tbl == NULL) {
RTE_LOG(ERR, LPM, "LPM memory allocation failed\n");
rte_free(lpm);
+ rte_free(te);
goto exit;
}
@@ -209,7 +218,9 @@ rte_lpm6_create(const char *name, int socket_id,
lpm->number_tbl8s = config->number_tbl8s;
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);
@@ -223,7 +234,8 @@ exit:
struct rte_lpm6 *
rte_lpm6_find_existing(const char *name)
{
- struct rte_lpm6 *l;
+ struct rte_lpm6 *l = NULL;
+ struct rte_tailq_entry *te;
struct rte_lpm6_list *lpm_list;
/* Check that we have an initialised tail queue */
@@ -234,14 +246,17 @@ rte_lpm6_find_existing(const char *name)
}
rte_rwlock_read_lock(RTE_EAL_TAILQ_RWLOCK);
- TAILQ_FOREACH(l, lpm_list, next) {
+ TAILQ_FOREACH(te, lpm_list, next) {
+ l = (struct rte_lpm6 *) te->data;
if (strncmp(name, l->name, RTE_LPM6_NAMESIZE) == 0)
break;
}
rte_rwlock_read_unlock(RTE_EAL_TAILQ_RWLOCK);
- if (l == NULL)
+ if (te == NULL) {
rte_errno = ENOENT;
+ return NULL;
+ }
return l;
}
@@ -252,13 +267,38 @@ rte_lpm6_find_existing(const char *name)
void
rte_lpm6_free(struct rte_lpm6 *lpm)
{
+ struct rte_lpm6_list *lpm_list;
+ struct rte_tailq_entry *te;
+
/* Check user arguments. */
if (lpm == NULL)
return;
- RTE_EAL_TAILQ_REMOVE(RTE_TAILQ_LPM6, rte_lpm6_list, lpm);
- rte_free(lpm->rules_tbl);
+ /* check that we have an initialised tail queue */
+ if ((lpm_list =
+ RTE_TAILQ_LOOKUP_BY_IDX(RTE_TAILQ_LPM, rte_lpm6_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);
}
/*
--
1.8.1.4