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Date: Fri, 23 Dec 2022 12:01:04 +0000
From: David Howells <dhowells@...hat.com>
To: netdev@...r.kernel.org
Cc: Marc Dionne <marc.dionne@...istor.com>,
linux-afs@...ts.infradead.org, dhowells@...hat.com,
linux-afs@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: [PATCH net-next 10/19] rxrpc: Make the set of connection IDs per
local endpoint
Make the set of connection IDs per local endpoint so that endpoints don't
cause each other's connections to get dismissed.
Signed-off-by: David Howells <dhowells@...hat.com>
cc: Marc Dionne <marc.dionne@...istor.com>
cc: linux-afs@...ts.infradead.org
---
net/rxrpc/af_rxrpc.c | 8 --------
net/rxrpc/ar-internal.h | 5 +++--
net/rxrpc/conn_client.c | 44 +++++++++++++++++++-------------------------
net/rxrpc/conn_object.c | 6 +++---
net/rxrpc/local_object.c | 10 ++++++++++
5 files changed, 35 insertions(+), 38 deletions(-)
diff --git a/net/rxrpc/af_rxrpc.c b/net/rxrpc/af_rxrpc.c
index 7ea576f6ba4b..6f6a6b77ee84 100644
--- a/net/rxrpc/af_rxrpc.c
+++ b/net/rxrpc/af_rxrpc.c
@@ -957,16 +957,9 @@ static const struct net_proto_family rxrpc_family_ops = {
static int __init af_rxrpc_init(void)
{
int ret = -1;
- unsigned int tmp;
BUILD_BUG_ON(sizeof(struct rxrpc_skb_priv) > sizeof_field(struct sk_buff, cb));
- get_random_bytes(&tmp, sizeof(tmp));
- tmp &= 0x3fffffff;
- if (tmp == 0)
- tmp = 1;
- idr_set_cursor(&rxrpc_client_conn_ids, tmp);
-
ret = -ENOMEM;
rxrpc_call_jar = kmem_cache_create(
"rxrpc_call_jar", sizeof(struct rxrpc_call), 0,
@@ -1062,7 +1055,6 @@ static void __exit af_rxrpc_exit(void)
* are released.
*/
rcu_barrier();
- rxrpc_destroy_client_conn_ids();
destroy_workqueue(rxrpc_workqueue);
rxrpc_exit_security();
diff --git a/net/rxrpc/ar-internal.h b/net/rxrpc/ar-internal.h
index 2a404f110286..bc3927883143 100644
--- a/net/rxrpc/ar-internal.h
+++ b/net/rxrpc/ar-internal.h
@@ -300,6 +300,8 @@ struct rxrpc_local {
int debug_id; /* debug ID for printks */
bool dead;
bool service_closed; /* Service socket closed */
+ struct idr conn_ids; /* List of connection IDs */
+ spinlock_t conn_lock; /* Lock for client connection pool */
struct sockaddr_rxrpc srx; /* local address */
};
@@ -885,9 +887,8 @@ static inline bool rxrpc_is_client_call(const struct rxrpc_call *call)
extern unsigned int rxrpc_reap_client_connections;
extern unsigned long rxrpc_conn_idle_client_expiry;
extern unsigned long rxrpc_conn_idle_client_fast_expiry;
-extern struct idr rxrpc_client_conn_ids;
-void rxrpc_destroy_client_conn_ids(void);
+void rxrpc_destroy_client_conn_ids(struct rxrpc_local *);
struct rxrpc_bundle *rxrpc_get_bundle(struct rxrpc_bundle *, enum rxrpc_bundle_trace);
void rxrpc_put_bundle(struct rxrpc_bundle *, enum rxrpc_bundle_trace);
int rxrpc_connect_call(struct rxrpc_sock *, struct rxrpc_call *,
diff --git a/net/rxrpc/conn_client.c b/net/rxrpc/conn_client.c
index 1edd65883c55..59ce5c08cf57 100644
--- a/net/rxrpc/conn_client.c
+++ b/net/rxrpc/conn_client.c
@@ -34,12 +34,6 @@ __read_mostly unsigned int rxrpc_reap_client_connections = 900;
__read_mostly unsigned long rxrpc_conn_idle_client_expiry = 2 * 60 * HZ;
__read_mostly unsigned long rxrpc_conn_idle_client_fast_expiry = 2 * HZ;
-/*
- * We use machine-unique IDs for our client connections.
- */
-DEFINE_IDR(rxrpc_client_conn_ids);
-static DEFINE_SPINLOCK(rxrpc_conn_id_lock);
-
static void rxrpc_deactivate_bundle(struct rxrpc_bundle *bundle);
/*
@@ -51,65 +45,65 @@ static void rxrpc_deactivate_bundle(struct rxrpc_bundle *bundle);
static int rxrpc_get_client_connection_id(struct rxrpc_connection *conn,
gfp_t gfp)
{
- struct rxrpc_net *rxnet = conn->rxnet;
+ struct rxrpc_local *local = conn->local;
int id;
_enter("");
idr_preload(gfp);
- spin_lock(&rxrpc_conn_id_lock);
+ spin_lock(&local->conn_lock);
- id = idr_alloc_cyclic(&rxrpc_client_conn_ids, conn,
+ id = idr_alloc_cyclic(&local->conn_ids, conn,
1, 0x40000000, GFP_NOWAIT);
if (id < 0)
goto error;
- spin_unlock(&rxrpc_conn_id_lock);
+ spin_unlock(&local->conn_lock);
idr_preload_end();
- conn->proto.epoch = rxnet->epoch;
+ conn->proto.epoch = local->rxnet->epoch;
conn->proto.cid = id << RXRPC_CIDSHIFT;
set_bit(RXRPC_CONN_HAS_IDR, &conn->flags);
_leave(" [CID %x]", conn->proto.cid);
return 0;
error:
- spin_unlock(&rxrpc_conn_id_lock);
+ spin_unlock(&local->conn_lock);
idr_preload_end();
_leave(" = %d", id);
return id;
}
/*
- * Release a connection ID for a client connection from the global pool.
+ * Release a connection ID for a client connection.
*/
-static void rxrpc_put_client_connection_id(struct rxrpc_connection *conn)
+static void rxrpc_put_client_connection_id(struct rxrpc_local *local,
+ struct rxrpc_connection *conn)
{
if (test_bit(RXRPC_CONN_HAS_IDR, &conn->flags)) {
- spin_lock(&rxrpc_conn_id_lock);
- idr_remove(&rxrpc_client_conn_ids,
- conn->proto.cid >> RXRPC_CIDSHIFT);
- spin_unlock(&rxrpc_conn_id_lock);
+ spin_lock(&local->conn_lock);
+ idr_remove(&local->conn_ids, conn->proto.cid >> RXRPC_CIDSHIFT);
+ spin_unlock(&local->conn_lock);
}
}
/*
* Destroy the client connection ID tree.
*/
-void rxrpc_destroy_client_conn_ids(void)
+void rxrpc_destroy_client_conn_ids(struct rxrpc_local *local)
{
struct rxrpc_connection *conn;
int id;
- if (!idr_is_empty(&rxrpc_client_conn_ids)) {
- idr_for_each_entry(&rxrpc_client_conn_ids, conn, id) {
+ if (!idr_is_empty(&local->conn_ids)) {
+ idr_for_each_entry(&local->conn_ids, conn, id) {
pr_err("AF_RXRPC: Leaked client conn %p {%d}\n",
conn, refcount_read(&conn->ref));
}
BUG();
}
- idr_destroy(&rxrpc_client_conn_ids);
+ idr_destroy(&local->conn_ids);
}
/*
@@ -225,7 +219,7 @@ rxrpc_alloc_client_connection(struct rxrpc_bundle *bundle, gfp_t gfp)
return conn;
error_1:
- rxrpc_put_client_connection_id(conn);
+ rxrpc_put_client_connection_id(bundle->local, conn);
error_0:
kfree(conn);
_leave(" = %d", ret);
@@ -257,7 +251,7 @@ static bool rxrpc_may_reuse_conn(struct rxrpc_connection *conn)
* times the maximum number of client conns away from the current
* allocation point to try and keep the IDs concentrated.
*/
- id_cursor = idr_get_cursor(&rxrpc_client_conn_ids);
+ id_cursor = idr_get_cursor(&conn->local->conn_ids);
id = conn->proto.cid >> RXRPC_CIDSHIFT;
distance = id - id_cursor;
if (distance < 0)
@@ -982,7 +976,7 @@ void rxrpc_kill_client_conn(struct rxrpc_connection *conn)
trace_rxrpc_client(conn, -1, rxrpc_client_cleanup);
atomic_dec(&rxnet->nr_client_conns);
- rxrpc_put_client_connection_id(conn);
+ rxrpc_put_client_connection_id(local, conn);
}
/*
diff --git a/net/rxrpc/conn_object.c b/net/rxrpc/conn_object.c
index 649c7fc94658..2ef43ce3dd3c 100644
--- a/net/rxrpc/conn_object.c
+++ b/net/rxrpc/conn_object.c
@@ -100,10 +100,10 @@ struct rxrpc_connection *rxrpc_find_client_connection_rcu(struct rxrpc_local *lo
_enter(",%x", sp->hdr.cid & RXRPC_CIDMASK);
- /* Look up client connections by connection ID alone as their IDs are
- * unique for this machine.
+ /* Look up client connections by connection ID alone as their
+ * IDs are unique for this machine.
*/
- conn = idr_find(&rxrpc_client_conn_ids, sp->hdr.cid >> RXRPC_CIDSHIFT);
+ conn = idr_find(&local->conn_ids, sp->hdr.cid >> RXRPC_CIDSHIFT);
if (!conn || refcount_read(&conn->ref) == 0) {
_debug("no conn");
goto not_found;
diff --git a/net/rxrpc/local_object.c b/net/rxrpc/local_object.c
index 8ef6cd8defa4..ca8b3ee68b59 100644
--- a/net/rxrpc/local_object.c
+++ b/net/rxrpc/local_object.c
@@ -89,6 +89,7 @@ static struct rxrpc_local *rxrpc_alloc_local(struct net *net,
const struct sockaddr_rxrpc *srx)
{
struct rxrpc_local *local;
+ u32 tmp;
local = kzalloc(sizeof(struct rxrpc_local), GFP_KERNEL);
if (local) {
@@ -109,6 +110,14 @@ static struct rxrpc_local *rxrpc_alloc_local(struct net *net,
local->debug_id = atomic_inc_return(&rxrpc_debug_id);
memcpy(&local->srx, srx, sizeof(*srx));
local->srx.srx_service = 0;
+ idr_init(&local->conn_ids);
+ get_random_bytes(&tmp, sizeof(tmp));
+ tmp &= 0x3fffffff;
+ if (tmp == 0)
+ tmp = 1;
+ idr_set_cursor(&local->conn_ids, tmp);
+ spin_lock_init(&local->conn_lock);
+
trace_rxrpc_local(local->debug_id, rxrpc_local_new, 1, 1);
}
@@ -409,6 +418,7 @@ void rxrpc_destroy_local(struct rxrpc_local *local)
* local endpoint.
*/
rxrpc_purge_queue(&local->rx_queue);
+ rxrpc_destroy_client_conn_ids(local);
}
/*
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