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Diffstat (limited to 'net/rds')
-rw-r--r--net/rds/af_rds.c2
-rw-r--r--net/rds/bind.c47
-rw-r--r--net/rds/rds.h1
3 files changed, 35 insertions, 15 deletions
diff --git a/net/rds/af_rds.c b/net/rds/af_rds.c
index dc087666217a..384ea1e3cd69 100644
--- a/net/rds/af_rds.c
+++ b/net/rds/af_rds.c
@@ -582,6 +582,8 @@ static int rds_init(void)
{
int ret;
+ rds_bind_lock_init();
+
ret = rds_conn_init();
if (ret)
goto out;
diff --git a/net/rds/bind.c b/net/rds/bind.c
index 166c60568d5e..bc6b93ecedb5 100644
--- a/net/rds/bind.c
+++ b/net/rds/bind.c
@@ -38,22 +38,27 @@
#include <linux/ratelimit.h>
#include "rds.h"
+struct bind_bucket {
+ rwlock_t lock;
+ struct hlist_head head;
+};
+
#define BIND_HASH_SIZE 1024
-static struct hlist_head bind_hash_table[BIND_HASH_SIZE];
-static DEFINE_RWLOCK(rds_bind_lock);
+static struct bind_bucket bind_hash_table[BIND_HASH_SIZE];
-static struct hlist_head *hash_to_bucket(__be32 addr, __be16 port)
+static struct bind_bucket *hash_to_bucket(__be32 addr, __be16 port)
{
return bind_hash_table + (jhash_2words((u32)addr, (u32)port, 0) &
(BIND_HASH_SIZE - 1));
}
/* must hold either read or write lock (write lock for insert != NULL) */
-static struct rds_sock *rds_bind_lookup(__be32 addr, __be16 port,
+static struct rds_sock *rds_bind_lookup(struct bind_bucket *bucket,
+ __be32 addr, __be16 port,
struct rds_sock *insert)
{
struct rds_sock *rs;
- struct hlist_head *head = hash_to_bucket(addr, port);
+ struct hlist_head *head = &bucket->head;
u64 cmp;
u64 needle = ((u64)be32_to_cpu(addr) << 32) | be16_to_cpu(port);
@@ -91,10 +96,11 @@ struct rds_sock *rds_find_bound(__be32 addr, __be16 port)
{
struct rds_sock *rs;
unsigned long flags;
+ struct bind_bucket *bucket = hash_to_bucket(addr, port);
- read_lock_irqsave(&rds_bind_lock, flags);
- rs = rds_bind_lookup(addr, port, NULL);
- read_unlock_irqrestore(&rds_bind_lock, flags);
+ read_lock_irqsave(&bucket->lock, flags);
+ rs = rds_bind_lookup(bucket, addr, port, NULL);
+ read_unlock_irqrestore(&bucket->lock, flags);
if (rs && sock_flag(rds_rs_to_sk(rs), SOCK_DEAD)) {
rds_sock_put(rs);
@@ -113,6 +119,7 @@ static int rds_add_bound(struct rds_sock *rs, __be32 addr, __be16 *port)
unsigned long flags;
int ret = -EADDRINUSE;
u16 rover, last;
+ struct bind_bucket *bucket;
if (*port != 0) {
rover = be16_to_cpu(*port);
@@ -122,13 +129,15 @@ static int rds_add_bound(struct rds_sock *rs, __be32 addr, __be16 *port)
last = rover - 1;
}
- write_lock_irqsave(&rds_bind_lock, flags);
-
do {
struct rds_sock *rrs;
if (rover == 0)
rover++;
- rrs = rds_bind_lookup(addr, cpu_to_be16(rover), rs);
+
+ bucket = hash_to_bucket(addr, cpu_to_be16(rover));
+ write_lock_irqsave(&bucket->lock, flags);
+ rrs = rds_bind_lookup(bucket, addr, cpu_to_be16(rover), rs);
+ write_unlock_irqrestore(&bucket->lock, flags);
if (!rrs) {
*port = rs->rs_bound_port;
ret = 0;
@@ -140,16 +149,16 @@ static int rds_add_bound(struct rds_sock *rs, __be32 addr, __be16 *port)
}
} while (rover++ != last);
- write_unlock_irqrestore(&rds_bind_lock, flags);
-
return ret;
}
void rds_remove_bound(struct rds_sock *rs)
{
unsigned long flags;
+ struct bind_bucket *bucket =
+ hash_to_bucket(rs->rs_bound_addr, rs->rs_bound_port);
- write_lock_irqsave(&rds_bind_lock, flags);
+ write_lock_irqsave(&bucket->lock, flags);
if (rs->rs_bound_addr) {
rdsdebug("rs %p unbinding from %pI4:%d\n",
@@ -161,7 +170,7 @@ void rds_remove_bound(struct rds_sock *rs)
rs->rs_bound_addr = 0;
}
- write_unlock_irqrestore(&rds_bind_lock, flags);
+ write_unlock_irqrestore(&bucket->lock, flags);
}
int rds_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len)
@@ -207,3 +216,11 @@ out:
release_sock(sk);
return ret;
}
+
+void rds_bind_lock_init(void)
+{
+ int i;
+
+ for (i = 0; i < BIND_HASH_SIZE; i++)
+ rwlock_init(&bind_hash_table[i].lock);
+}
diff --git a/net/rds/rds.h b/net/rds/rds.h
index afb4048d0cfd..121fb81aab8b 100644
--- a/net/rds/rds.h
+++ b/net/rds/rds.h
@@ -603,6 +603,7 @@ extern wait_queue_head_t rds_poll_waitq;
int rds_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len);
void rds_remove_bound(struct rds_sock *rs);
struct rds_sock *rds_find_bound(__be32 addr, __be16 port);
+void rds_bind_lock_init(void);
/* cong.c */
int rds_cong_get_maps(struct rds_connection *conn);