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-rw-r--r--net/rds/af_rds.c10
-rw-r--r--net/rds/bind.c125
-rw-r--r--net/rds/rds.h7
3 files changed, 56 insertions, 86 deletions
diff --git a/net/rds/af_rds.c b/net/rds/af_rds.c
index 384ea1e3cd69..b5476aebd68d 100644
--- a/net/rds/af_rds.c
+++ b/net/rds/af_rds.c
@@ -573,6 +573,7 @@ static void rds_exit(void)
rds_threads_exit();
rds_stats_exit();
rds_page_exit();
+ rds_bind_lock_destroy();
rds_info_deregister_func(RDS_INFO_SOCKETS, rds_sock_info);
rds_info_deregister_func(RDS_INFO_RECV_MESSAGES, rds_sock_inc_info);
}
@@ -582,11 +583,14 @@ static int rds_init(void)
{
int ret;
- rds_bind_lock_init();
+ ret = rds_bind_lock_init();
+ if (ret)
+ goto out;
ret = rds_conn_init();
if (ret)
- goto out;
+ goto out_bind;
+
ret = rds_threads_init();
if (ret)
goto out_conn;
@@ -620,6 +624,8 @@ out_conn:
rds_conn_exit();
rds_cong_exit();
rds_page_exit();
+out_bind:
+ rds_bind_lock_destroy();
out:
return ret;
}
diff --git a/net/rds/bind.c b/net/rds/bind.c
index 61925667b7a4..b22ea956522b 100644
--- a/net/rds/bind.c
+++ b/net/rds/bind.c
@@ -38,54 +38,17 @@
#include <linux/ratelimit.h>
#include "rds.h"
-struct bind_bucket {
- rwlock_t lock;
- struct hlist_head head;
+static struct rhashtable bind_hash_table;
+
+static struct rhashtable_params ht_parms = {
+ .nelem_hint = 768,
+ .key_len = sizeof(u64),
+ .key_offset = offsetof(struct rds_sock, rs_bound_key),
+ .head_offset = offsetof(struct rds_sock, rs_bound_node),
+ .max_size = 16384,
+ .min_size = 1024,
};
-#define BIND_HASH_SIZE 1024
-static struct bind_bucket bind_hash_table[BIND_HASH_SIZE];
-
-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(struct bind_bucket *bucket,
- __be32 addr, __be16 port,
- struct rds_sock *insert)
-{
- struct rds_sock *rs;
- struct hlist_head *head = &bucket->head;
- u64 cmp;
- u64 needle = ((u64)be32_to_cpu(addr) << 32) | be16_to_cpu(port);
-
- hlist_for_each_entry(rs, head, rs_bound_node) {
- cmp = ((u64)be32_to_cpu(rs->rs_bound_addr) << 32) |
- be16_to_cpu(rs->rs_bound_port);
-
- if (cmp == needle) {
- rds_sock_addref(rs);
- return rs;
- }
- }
-
- if (insert) {
- /*
- * make sure our addr and port are set before
- * we are added to the list.
- */
- insert->rs_bound_addr = addr;
- insert->rs_bound_port = port;
- rds_sock_addref(insert);
-
- hlist_add_head(&insert->rs_bound_node, head);
- }
- return NULL;
-}
-
/*
* Return the rds_sock bound at the given local address.
*
@@ -94,18 +57,14 @@ static struct rds_sock *rds_bind_lookup(struct bind_bucket *bucket,
*/
struct rds_sock *rds_find_bound(__be32 addr, __be16 port)
{
+ u64 key = ((u64)addr << 32) | port;
struct rds_sock *rs;
- unsigned long flags;
- struct bind_bucket *bucket = hash_to_bucket(addr, port);
-
- 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);
+ rs = rhashtable_lookup_fast(&bind_hash_table, &key, ht_parms);
+ if (rs && !sock_flag(rds_rs_to_sk(rs), SOCK_DEAD))
+ rds_sock_addref(rs);
+ else
rs = NULL;
- }
rdsdebug("returning rs %p for %pI4:%u\n", rs, &addr,
ntohs(port));
@@ -116,10 +75,9 @@ struct rds_sock *rds_find_bound(__be32 addr, __be16 port)
/* returns -ve errno or +ve port */
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;
+ u64 key;
if (*port != 0) {
rover = be16_to_cpu(*port);
@@ -130,22 +88,29 @@ static int rds_add_bound(struct rds_sock *rs, __be32 addr, __be16 *port)
}
do {
- struct rds_sock *rrs;
if (rover == 0)
rover++;
- 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) {
+ key = ((u64)addr << 32) | cpu_to_be16(rover);
+ if (rhashtable_lookup_fast(&bind_hash_table, &key, ht_parms))
+ continue;
+
+ rs->rs_bound_key = key;
+ rs->rs_bound_addr = addr;
+ rs->rs_bound_port = cpu_to_be16(rover);
+ rs->rs_bound_node.next = NULL;
+ rds_sock_addref(rs);
+ if (!rhashtable_insert_fast(&bind_hash_table,
+ &rs->rs_bound_node, ht_parms)) {
*port = rs->rs_bound_port;
ret = 0;
rdsdebug("rs %p binding to %pI4:%d\n",
rs, &addr, (int)ntohs(*port));
break;
} else {
- rds_sock_put(rrs);
+ rds_sock_put(rs);
+ ret = -ENOMEM;
+ break;
}
} while (rover++ != last);
@@ -154,23 +119,17 @@ static int rds_add_bound(struct rds_sock *rs, __be32 addr, __be16 *port)
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(&bucket->lock, flags);
- if (rs->rs_bound_addr) {
- rdsdebug("rs %p unbinding from %pI4:%d\n",
- rs, &rs->rs_bound_addr,
- ntohs(rs->rs_bound_port));
+ if (!rs->rs_bound_addr)
+ return;
- hlist_del_init(&rs->rs_bound_node);
- rds_sock_put(rs);
- rs->rs_bound_addr = 0;
- }
+ rdsdebug("rs %p unbinding from %pI4:%d\n",
+ rs, &rs->rs_bound_addr,
+ ntohs(rs->rs_bound_port));
- write_unlock_irqrestore(&bucket->lock, flags);
+ rhashtable_remove_fast(&bind_hash_table, &rs->rs_bound_node, ht_parms);
+ rds_sock_put(rs);
+ rs->rs_bound_addr = 0;
}
int rds_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len)
@@ -224,10 +183,12 @@ out:
return ret;
}
-void rds_bind_lock_init(void)
+void rds_bind_lock_destroy(void)
{
- int i;
+ rhashtable_destroy(&bind_hash_table);
+}
- for (i = 0; i < BIND_HASH_SIZE; i++)
- rwlock_init(&bind_hash_table[i].lock);
+int rds_bind_lock_init(void)
+{
+ return rhashtable_init(&bind_hash_table, &ht_parms);
}
diff --git a/net/rds/rds.h b/net/rds/rds.h
index 543c308fcc2a..0e2797bdc316 100644
--- a/net/rds/rds.h
+++ b/net/rds/rds.h
@@ -7,6 +7,7 @@
#include <rdma/rdma_cm.h>
#include <linux/mutex.h>
#include <linux/rds.h>
+#include <linux/rhashtable.h>
#include "info.h"
@@ -474,7 +475,8 @@ struct rds_sock {
* bound_addr used for both incoming and outgoing, no INADDR_ANY
* support.
*/
- struct hlist_node rs_bound_node;
+ struct rhash_head rs_bound_node;
+ u64 rs_bound_key;
__be32 rs_bound_addr;
__be32 rs_conn_addr;
__be16 rs_bound_port;
@@ -605,7 +607,8 @@ 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);
+int rds_bind_lock_init(void);
+void rds_bind_lock_destroy(void);
/* cong.c */
int rds_cong_get_maps(struct rds_connection *conn);
generated by cgit v1.2.3-55-g7522 (git 2.39.0) at 2024-06-29 07:54:48 +0200