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https://github.com/AetherDroid/android_kernel_samsung_on5xelte.git
synced 2025-09-08 01:08:03 -04:00
Fixed MTP to work with TWRP
This commit is contained in:
awab228
commit
f6dfaef42e
50820 changed files with 20846062 additions and 0 deletions
251
net/rds/rdma_transport.c
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251
net/rds/rdma_transport.c
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/*
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* Copyright (c) 2009 Oracle. All rights reserved.
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*
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* This software is available to you under a choice of one of two
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* licenses. You may choose to be licensed under the terms of the GNU
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* General Public License (GPL) Version 2, available from the file
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* COPYING in the main directory of this source tree, or the
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* OpenIB.org BSD license below:
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*
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* Redistribution and use in source and binary forms, with or
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* without modification, are permitted provided that the following
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* conditions are met:
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*
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* - Redistributions of source code must retain the above
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* copyright notice, this list of conditions and the following
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* disclaimer.
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*
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* - Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the following
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* disclaimer in the documentation and/or other materials
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* provided with the distribution.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
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* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
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* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*
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*/
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#include <linux/module.h>
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#include <rdma/rdma_cm.h>
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#include "rdma_transport.h"
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static struct rdma_cm_id *rds_rdma_listen_id;
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static char *rds_cm_event_strings[] = {
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#define RDS_CM_EVENT_STRING(foo) \
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[RDMA_CM_EVENT_##foo] = __stringify(RDMA_CM_EVENT_##foo)
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RDS_CM_EVENT_STRING(ADDR_RESOLVED),
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RDS_CM_EVENT_STRING(ADDR_ERROR),
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RDS_CM_EVENT_STRING(ROUTE_RESOLVED),
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RDS_CM_EVENT_STRING(ROUTE_ERROR),
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RDS_CM_EVENT_STRING(CONNECT_REQUEST),
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RDS_CM_EVENT_STRING(CONNECT_RESPONSE),
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RDS_CM_EVENT_STRING(CONNECT_ERROR),
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RDS_CM_EVENT_STRING(UNREACHABLE),
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RDS_CM_EVENT_STRING(REJECTED),
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RDS_CM_EVENT_STRING(ESTABLISHED),
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RDS_CM_EVENT_STRING(DISCONNECTED),
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RDS_CM_EVENT_STRING(DEVICE_REMOVAL),
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RDS_CM_EVENT_STRING(MULTICAST_JOIN),
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RDS_CM_EVENT_STRING(MULTICAST_ERROR),
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RDS_CM_EVENT_STRING(ADDR_CHANGE),
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RDS_CM_EVENT_STRING(TIMEWAIT_EXIT),
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#undef RDS_CM_EVENT_STRING
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};
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static char *rds_cm_event_str(enum rdma_cm_event_type type)
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{
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return rds_str_array(rds_cm_event_strings,
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ARRAY_SIZE(rds_cm_event_strings), type);
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};
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int rds_rdma_cm_event_handler(struct rdma_cm_id *cm_id,
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struct rdma_cm_event *event)
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{
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/* this can be null in the listening path */
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struct rds_connection *conn = cm_id->context;
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struct rds_transport *trans;
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int ret = 0;
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rdsdebug("conn %p id %p handling event %u (%s)\n", conn, cm_id,
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event->event, rds_cm_event_str(event->event));
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if (cm_id->device->node_type == RDMA_NODE_RNIC)
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trans = &rds_iw_transport;
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else
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trans = &rds_ib_transport;
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/* Prevent shutdown from tearing down the connection
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* while we're executing. */
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if (conn) {
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mutex_lock(&conn->c_cm_lock);
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/* If the connection is being shut down, bail out
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* right away. We return 0 so cm_id doesn't get
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* destroyed prematurely */
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if (rds_conn_state(conn) == RDS_CONN_DISCONNECTING) {
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/* Reject incoming connections while we're tearing
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* down an existing one. */
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if (event->event == RDMA_CM_EVENT_CONNECT_REQUEST)
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ret = 1;
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goto out;
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}
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}
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switch (event->event) {
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case RDMA_CM_EVENT_CONNECT_REQUEST:
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ret = trans->cm_handle_connect(cm_id, event);
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break;
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case RDMA_CM_EVENT_ADDR_RESOLVED:
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/* XXX do we need to clean up if this fails? */
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ret = rdma_resolve_route(cm_id,
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RDS_RDMA_RESOLVE_TIMEOUT_MS);
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break;
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case RDMA_CM_EVENT_ROUTE_RESOLVED:
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/* XXX worry about racing with listen acceptance */
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ret = trans->cm_initiate_connect(cm_id);
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break;
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case RDMA_CM_EVENT_ESTABLISHED:
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trans->cm_connect_complete(conn, event);
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break;
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case RDMA_CM_EVENT_ADDR_ERROR:
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case RDMA_CM_EVENT_ROUTE_ERROR:
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case RDMA_CM_EVENT_CONNECT_ERROR:
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case RDMA_CM_EVENT_UNREACHABLE:
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case RDMA_CM_EVENT_REJECTED:
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case RDMA_CM_EVENT_DEVICE_REMOVAL:
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case RDMA_CM_EVENT_ADDR_CHANGE:
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if (conn)
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rds_conn_drop(conn);
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break;
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case RDMA_CM_EVENT_DISCONNECTED:
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rdsdebug("DISCONNECT event - dropping connection "
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"%pI4->%pI4\n", &conn->c_laddr,
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&conn->c_faddr);
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rds_conn_drop(conn);
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break;
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default:
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/* things like device disconnect? */
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printk(KERN_ERR "RDS: unknown event %u (%s)!\n",
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event->event, rds_cm_event_str(event->event));
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break;
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}
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out:
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if (conn)
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mutex_unlock(&conn->c_cm_lock);
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rdsdebug("id %p event %u (%s) handling ret %d\n", cm_id, event->event,
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rds_cm_event_str(event->event), ret);
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return ret;
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}
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static int rds_rdma_listen_init(void)
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{
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struct sockaddr_in sin;
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struct rdma_cm_id *cm_id;
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int ret;
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cm_id = rdma_create_id(rds_rdma_cm_event_handler, NULL, RDMA_PS_TCP,
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IB_QPT_RC);
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if (IS_ERR(cm_id)) {
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ret = PTR_ERR(cm_id);
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printk(KERN_ERR "RDS/RDMA: failed to setup listener, "
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"rdma_create_id() returned %d\n", ret);
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return ret;
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}
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sin.sin_family = AF_INET;
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sin.sin_addr.s_addr = (__force u32)htonl(INADDR_ANY);
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sin.sin_port = (__force u16)htons(RDS_PORT);
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/*
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* XXX I bet this binds the cm_id to a device. If we want to support
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* fail-over we'll have to take this into consideration.
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*/
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ret = rdma_bind_addr(cm_id, (struct sockaddr *)&sin);
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if (ret) {
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printk(KERN_ERR "RDS/RDMA: failed to setup listener, "
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"rdma_bind_addr() returned %d\n", ret);
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goto out;
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}
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ret = rdma_listen(cm_id, 128);
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if (ret) {
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printk(KERN_ERR "RDS/RDMA: failed to setup listener, "
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"rdma_listen() returned %d\n", ret);
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goto out;
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}
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rdsdebug("cm %p listening on port %u\n", cm_id, RDS_PORT);
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rds_rdma_listen_id = cm_id;
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cm_id = NULL;
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out:
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if (cm_id)
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rdma_destroy_id(cm_id);
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return ret;
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}
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static void rds_rdma_listen_stop(void)
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{
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if (rds_rdma_listen_id) {
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rdsdebug("cm %p\n", rds_rdma_listen_id);
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rdma_destroy_id(rds_rdma_listen_id);
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rds_rdma_listen_id = NULL;
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}
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}
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static int rds_rdma_init(void)
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{
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int ret;
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ret = rds_rdma_listen_init();
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if (ret)
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goto out;
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ret = rds_iw_init();
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if (ret)
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goto err_iw_init;
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ret = rds_ib_init();
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if (ret)
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goto err_ib_init;
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goto out;
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err_ib_init:
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rds_iw_exit();
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err_iw_init:
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rds_rdma_listen_stop();
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out:
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return ret;
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}
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module_init(rds_rdma_init);
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static void rds_rdma_exit(void)
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{
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/* stop listening first to ensure no new connections are attempted */
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rds_rdma_listen_stop();
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rds_ib_exit();
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rds_iw_exit();
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}
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module_exit(rds_rdma_exit);
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MODULE_AUTHOR("Oracle Corporation <rds-devel@oss.oracle.com>");
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MODULE_DESCRIPTION("RDS: IB/iWARP transport");
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MODULE_LICENSE("Dual BSD/GPL");
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