rxrpc: Split client connection code out into its own file
Split the client-specific connection code out into its own file. It will
behave somewhat differently from the service-specific connection code, so
it makes sense to separate them.
Signed-off-by: David Howells <dhowells@redhat.com>
diff --git a/net/rxrpc/conn_object.c b/net/rxrpc/conn_object.c
index ce83f3e..ab5c8c2 100644
--- a/net/rxrpc/conn_object.c
+++ b/net/rxrpc/conn_object.c
@@ -34,7 +34,7 @@
/*
* allocate a new connection
*/
-static struct rxrpc_connection *rxrpc_alloc_connection(gfp_t gfp)
+struct rxrpc_connection *rxrpc_alloc_connection(gfp_t gfp)
{
struct rxrpc_connection *conn;
@@ -61,251 +61,6 @@
}
/*
- * Allocate a client connection. The caller must take care to clear any
- * padding bytes in *cp.
- */
-static struct rxrpc_connection *
-rxrpc_alloc_client_connection(struct rxrpc_conn_parameters *cp, gfp_t gfp)
-{
- struct rxrpc_connection *conn;
- int ret;
-
- _enter("");
-
- conn = rxrpc_alloc_connection(gfp);
- if (!conn) {
- _leave(" = -ENOMEM");
- return ERR_PTR(-ENOMEM);
- }
-
- conn->params = *cp;
- conn->proto.local = cp->local;
- conn->proto.epoch = rxrpc_epoch;
- conn->proto.cid = 0;
- conn->proto.in_clientflag = 0;
- conn->proto.family = cp->peer->srx.transport.family;
- conn->out_clientflag = RXRPC_CLIENT_INITIATED;
- conn->state = RXRPC_CONN_CLIENT;
-
- switch (conn->proto.family) {
- case AF_INET:
- conn->proto.addr_size = sizeof(conn->proto.ipv4_addr);
- conn->proto.ipv4_addr = cp->peer->srx.transport.sin.sin_addr;
- conn->proto.port = cp->peer->srx.transport.sin.sin_port;
- break;
- }
-
- ret = rxrpc_get_client_connection_id(conn, gfp);
- if (ret < 0)
- goto error_0;
-
- ret = rxrpc_init_client_conn_security(conn);
- if (ret < 0)
- goto error_1;
-
- ret = conn->security->prime_packet_security(conn);
- if (ret < 0)
- goto error_2;
-
- write_lock(&rxrpc_connection_lock);
- list_add_tail(&conn->link, &rxrpc_connections);
- write_unlock(&rxrpc_connection_lock);
-
- /* We steal the caller's peer ref. */
- cp->peer = NULL;
- rxrpc_get_local(conn->params.local);
- key_get(conn->params.key);
-
- _leave(" = %p", conn);
- return conn;
-
-error_2:
- conn->security->clear(conn);
-error_1:
- rxrpc_put_client_connection_id(conn);
-error_0:
- kfree(conn);
- _leave(" = %d", ret);
- return ERR_PTR(ret);
-}
-
-/*
- * find a connection for a call
- * - called in process context with IRQs enabled
- */
-int rxrpc_connect_call(struct rxrpc_call *call,
- struct rxrpc_conn_parameters *cp,
- struct sockaddr_rxrpc *srx,
- gfp_t gfp)
-{
- struct rxrpc_connection *conn, *candidate = NULL;
- struct rxrpc_local *local = cp->local;
- struct rb_node *p, **pp, *parent;
- long diff;
- int chan;
-
- DECLARE_WAITQUEUE(myself, current);
-
- _enter("{%d,%lx},", call->debug_id, call->user_call_ID);
-
- cp->peer = rxrpc_lookup_peer(cp->local, srx, gfp);
- if (!cp->peer)
- return -ENOMEM;
-
- if (!cp->exclusive) {
- /* Search for a existing client connection unless this is going
- * to be a connection that's used exclusively for a single call.
- */
- _debug("search 1");
- spin_lock(&local->client_conns_lock);
- p = local->client_conns.rb_node;
- while (p) {
- conn = rb_entry(p, struct rxrpc_connection, client_node);
-
-#define cmp(X) ((long)conn->params.X - (long)cp->X)
- diff = (cmp(peer) ?:
- cmp(key) ?:
- cmp(security_level));
- if (diff < 0)
- p = p->rb_left;
- else if (diff > 0)
- p = p->rb_right;
- else
- goto found_extant_conn;
- }
- spin_unlock(&local->client_conns_lock);
- }
-
- /* We didn't find a connection or we want an exclusive one. */
- _debug("get new conn");
- candidate = rxrpc_alloc_client_connection(cp, gfp);
- if (!candidate) {
- _leave(" = -ENOMEM");
- return -ENOMEM;
- }
-
- if (cp->exclusive) {
- /* Assign the call on an exclusive connection to channel 0 and
- * don't add the connection to the endpoint's shareable conn
- * lookup tree.
- */
- _debug("exclusive chan 0");
- conn = candidate;
- atomic_set(&conn->avail_chans, RXRPC_MAXCALLS - 1);
- spin_lock(&conn->channel_lock);
- chan = 0;
- goto found_channel;
- }
-
- /* We need to redo the search before attempting to add a new connection
- * lest we race with someone else adding a conflicting instance.
- */
- _debug("search 2");
- spin_lock(&local->client_conns_lock);
-
- pp = &local->client_conns.rb_node;
- parent = NULL;
- while (*pp) {
- parent = *pp;
- conn = rb_entry(parent, struct rxrpc_connection, client_node);
-
- diff = (cmp(peer) ?:
- cmp(key) ?:
- cmp(security_level));
- if (diff < 0)
- pp = &(*pp)->rb_left;
- else if (diff > 0)
- pp = &(*pp)->rb_right;
- else
- goto found_extant_conn;
- }
-
- /* The second search also failed; simply add the new connection with
- * the new call in channel 0. Note that we need to take the channel
- * lock before dropping the client conn lock.
- */
- _debug("new conn");
- conn = candidate;
- candidate = NULL;
-
- rb_link_node(&conn->client_node, parent, pp);
- rb_insert_color(&conn->client_node, &local->client_conns);
-
- atomic_set(&conn->avail_chans, RXRPC_MAXCALLS - 1);
- spin_lock(&conn->channel_lock);
- spin_unlock(&local->client_conns_lock);
- chan = 0;
-
-found_channel:
- _debug("found chan");
- call->conn = conn;
- call->channel = chan;
- call->epoch = conn->proto.epoch;
- call->cid = conn->proto.cid | chan;
- call->call_id = ++conn->channels[chan].call_counter;
- conn->channels[chan].call_id = call->call_id;
- rcu_assign_pointer(conn->channels[chan].call, call);
-
- _net("CONNECT call %d on conn %d", call->debug_id, conn->debug_id);
-
- spin_unlock(&conn->channel_lock);
- rxrpc_put_peer(cp->peer);
- cp->peer = NULL;
- _leave(" = %p {u=%d}", conn, atomic_read(&conn->usage));
- return 0;
-
- /* We found a suitable connection already in existence. Discard any
- * candidate we may have allocated, and try to get a channel on this
- * one.
- */
-found_extant_conn:
- _debug("found conn");
- rxrpc_get_connection(conn);
- spin_unlock(&local->client_conns_lock);
-
- rxrpc_put_connection(candidate);
-
- if (!atomic_add_unless(&conn->avail_chans, -1, 0)) {
- if (!gfpflags_allow_blocking(gfp)) {
- rxrpc_put_connection(conn);
- _leave(" = -EAGAIN");
- return -EAGAIN;
- }
-
- add_wait_queue(&conn->channel_wq, &myself);
- for (;;) {
- set_current_state(TASK_INTERRUPTIBLE);
- if (atomic_add_unless(&conn->avail_chans, -1, 0))
- break;
- if (signal_pending(current))
- goto interrupted;
- schedule();
- }
- remove_wait_queue(&conn->channel_wq, &myself);
- __set_current_state(TASK_RUNNING);
- }
-
- /* The connection allegedly now has a free channel and we can now
- * attach the call to it.
- */
- spin_lock(&conn->channel_lock);
-
- for (chan = 0; chan < RXRPC_MAXCALLS; chan++)
- if (!conn->channels[chan].call)
- goto found_channel;
- BUG();
-
-interrupted:
- remove_wait_queue(&conn->channel_wq, &myself);
- __set_current_state(TASK_RUNNING);
- rxrpc_put_connection(conn);
- rxrpc_put_peer(cp->peer);
- cp->peer = NULL;
- _leave(" = -ERESTARTSYS");
- return -ERESTARTSYS;
-}
-
-/*
* get a record of an incoming connection
*/
struct rxrpc_connection *rxrpc_incoming_connection(struct rxrpc_local *local,