![David S. Miller](/assets/img/avatar_default.png)
Both conflict were simple overlapping changes. In the kaweth case, Eric Dumazet's skb_cow() bug fix overlapped the conversion of the driver in net-next to use in-netdev stats. Signed-off-by: David S. Miller <davem@davemloft.net>
1011 lines
22 KiB
C
1011 lines
22 KiB
C
/*
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* Copyright (c) 2015, Sony Mobile Communications Inc.
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* Copyright (c) 2013, The Linux Foundation. All rights reserved.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 and
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* only version 2 as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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#include <linux/module.h>
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#include <linux/netlink.h>
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#include <linux/qrtr.h>
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#include <linux/termios.h> /* For TIOCINQ/OUTQ */
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#include <net/sock.h>
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#include "qrtr.h"
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#define QRTR_PROTO_VER 1
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/* auto-bind range */
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#define QRTR_MIN_EPH_SOCKET 0x4000
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#define QRTR_MAX_EPH_SOCKET 0x7fff
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enum qrtr_pkt_type {
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QRTR_TYPE_DATA = 1,
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QRTR_TYPE_HELLO = 2,
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QRTR_TYPE_BYE = 3,
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QRTR_TYPE_NEW_SERVER = 4,
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QRTR_TYPE_DEL_SERVER = 5,
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QRTR_TYPE_DEL_CLIENT = 6,
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QRTR_TYPE_RESUME_TX = 7,
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QRTR_TYPE_EXIT = 8,
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QRTR_TYPE_PING = 9,
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};
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/**
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* struct qrtr_hdr - (I|R)PCrouter packet header
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* @version: protocol version
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* @type: packet type; one of QRTR_TYPE_*
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* @src_node_id: source node
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* @src_port_id: source port
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* @confirm_rx: boolean; whether a resume-tx packet should be send in reply
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* @size: length of packet, excluding this header
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* @dst_node_id: destination node
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* @dst_port_id: destination port
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*/
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struct qrtr_hdr {
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__le32 version;
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__le32 type;
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__le32 src_node_id;
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__le32 src_port_id;
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__le32 confirm_rx;
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__le32 size;
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__le32 dst_node_id;
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__le32 dst_port_id;
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} __packed;
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#define QRTR_HDR_SIZE sizeof(struct qrtr_hdr)
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#define QRTR_NODE_BCAST ((unsigned int)-1)
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#define QRTR_PORT_CTRL ((unsigned int)-2)
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struct qrtr_sock {
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/* WARNING: sk must be the first member */
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struct sock sk;
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struct sockaddr_qrtr us;
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struct sockaddr_qrtr peer;
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};
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static inline struct qrtr_sock *qrtr_sk(struct sock *sk)
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{
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BUILD_BUG_ON(offsetof(struct qrtr_sock, sk) != 0);
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return container_of(sk, struct qrtr_sock, sk);
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}
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static unsigned int qrtr_local_nid = -1;
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/* for node ids */
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static RADIX_TREE(qrtr_nodes, GFP_KERNEL);
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/* broadcast list */
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static LIST_HEAD(qrtr_all_nodes);
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/* lock for qrtr_nodes, qrtr_all_nodes and node reference */
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static DEFINE_MUTEX(qrtr_node_lock);
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/* local port allocation management */
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static DEFINE_IDR(qrtr_ports);
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static DEFINE_MUTEX(qrtr_port_lock);
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/**
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* struct qrtr_node - endpoint node
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* @ep_lock: lock for endpoint management and callbacks
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* @ep: endpoint
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* @ref: reference count for node
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* @nid: node id
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* @rx_queue: receive queue
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* @work: scheduled work struct for recv work
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* @item: list item for broadcast list
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*/
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struct qrtr_node {
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struct mutex ep_lock;
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struct qrtr_endpoint *ep;
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struct kref ref;
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unsigned int nid;
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struct sk_buff_head rx_queue;
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struct work_struct work;
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struct list_head item;
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};
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/* Release node resources and free the node.
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*
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* Do not call directly, use qrtr_node_release. To be used with
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* kref_put_mutex. As such, the node mutex is expected to be locked on call.
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*/
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static void __qrtr_node_release(struct kref *kref)
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{
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struct qrtr_node *node = container_of(kref, struct qrtr_node, ref);
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if (node->nid != QRTR_EP_NID_AUTO)
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radix_tree_delete(&qrtr_nodes, node->nid);
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list_del(&node->item);
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mutex_unlock(&qrtr_node_lock);
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skb_queue_purge(&node->rx_queue);
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kfree(node);
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}
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/* Increment reference to node. */
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static struct qrtr_node *qrtr_node_acquire(struct qrtr_node *node)
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{
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if (node)
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kref_get(&node->ref);
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return node;
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}
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/* Decrement reference to node and release as necessary. */
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static void qrtr_node_release(struct qrtr_node *node)
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{
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if (!node)
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return;
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kref_put_mutex(&node->ref, __qrtr_node_release, &qrtr_node_lock);
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}
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/* Pass an outgoing packet socket buffer to the endpoint driver. */
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static int qrtr_node_enqueue(struct qrtr_node *node, struct sk_buff *skb)
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{
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int rc = -ENODEV;
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mutex_lock(&node->ep_lock);
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if (node->ep)
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rc = node->ep->xmit(node->ep, skb);
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else
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kfree_skb(skb);
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mutex_unlock(&node->ep_lock);
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return rc;
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}
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/* Lookup node by id.
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*
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* callers must release with qrtr_node_release()
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*/
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static struct qrtr_node *qrtr_node_lookup(unsigned int nid)
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{
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struct qrtr_node *node;
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mutex_lock(&qrtr_node_lock);
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node = radix_tree_lookup(&qrtr_nodes, nid);
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node = qrtr_node_acquire(node);
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mutex_unlock(&qrtr_node_lock);
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return node;
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}
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/* Assign node id to node.
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*
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* This is mostly useful for automatic node id assignment, based on
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* the source id in the incoming packet.
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*/
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static void qrtr_node_assign(struct qrtr_node *node, unsigned int nid)
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{
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if (node->nid != QRTR_EP_NID_AUTO || nid == QRTR_EP_NID_AUTO)
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return;
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mutex_lock(&qrtr_node_lock);
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radix_tree_insert(&qrtr_nodes, nid, node);
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node->nid = nid;
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mutex_unlock(&qrtr_node_lock);
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}
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/**
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* qrtr_endpoint_post() - post incoming data
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* @ep: endpoint handle
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* @data: data pointer
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* @len: size of data in bytes
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*
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* Return: 0 on success; negative error code on failure
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*/
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int qrtr_endpoint_post(struct qrtr_endpoint *ep, const void *data, size_t len)
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{
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struct qrtr_node *node = ep->node;
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const struct qrtr_hdr *phdr = data;
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struct sk_buff *skb;
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unsigned int psize;
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unsigned int size;
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unsigned int type;
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unsigned int ver;
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unsigned int dst;
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if (len < QRTR_HDR_SIZE || len & 3)
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return -EINVAL;
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ver = le32_to_cpu(phdr->version);
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size = le32_to_cpu(phdr->size);
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type = le32_to_cpu(phdr->type);
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dst = le32_to_cpu(phdr->dst_port_id);
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psize = (size + 3) & ~3;
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if (ver != QRTR_PROTO_VER)
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return -EINVAL;
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if (len != psize + QRTR_HDR_SIZE)
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return -EINVAL;
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if (dst != QRTR_PORT_CTRL && type != QRTR_TYPE_DATA)
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return -EINVAL;
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skb = netdev_alloc_skb(NULL, len);
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if (!skb)
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return -ENOMEM;
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skb_reset_transport_header(skb);
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memcpy(skb_put(skb, len), data, len);
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skb_queue_tail(&node->rx_queue, skb);
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schedule_work(&node->work);
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return 0;
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}
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EXPORT_SYMBOL_GPL(qrtr_endpoint_post);
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/* Allocate and construct a resume-tx packet. */
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static struct sk_buff *qrtr_alloc_resume_tx(u32 src_node,
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u32 dst_node, u32 port)
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{
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const int pkt_len = 20;
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struct qrtr_hdr *hdr;
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struct sk_buff *skb;
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__le32 *buf;
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skb = alloc_skb(QRTR_HDR_SIZE + pkt_len, GFP_KERNEL);
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if (!skb)
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return NULL;
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skb_reset_transport_header(skb);
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hdr = (struct qrtr_hdr *)skb_put(skb, QRTR_HDR_SIZE);
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hdr->version = cpu_to_le32(QRTR_PROTO_VER);
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hdr->type = cpu_to_le32(QRTR_TYPE_RESUME_TX);
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hdr->src_node_id = cpu_to_le32(src_node);
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hdr->src_port_id = cpu_to_le32(QRTR_PORT_CTRL);
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hdr->confirm_rx = cpu_to_le32(0);
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hdr->size = cpu_to_le32(pkt_len);
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hdr->dst_node_id = cpu_to_le32(dst_node);
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hdr->dst_port_id = cpu_to_le32(QRTR_PORT_CTRL);
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buf = (__le32 *)skb_put(skb, pkt_len);
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memset(buf, 0, pkt_len);
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buf[0] = cpu_to_le32(QRTR_TYPE_RESUME_TX);
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buf[1] = cpu_to_le32(src_node);
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buf[2] = cpu_to_le32(port);
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return skb;
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}
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static struct qrtr_sock *qrtr_port_lookup(int port);
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static void qrtr_port_put(struct qrtr_sock *ipc);
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/* Handle and route a received packet.
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*
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* This will auto-reply with resume-tx packet as necessary.
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*/
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static void qrtr_node_rx_work(struct work_struct *work)
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{
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struct qrtr_node *node = container_of(work, struct qrtr_node, work);
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struct sk_buff *skb;
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while ((skb = skb_dequeue(&node->rx_queue)) != NULL) {
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const struct qrtr_hdr *phdr;
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u32 dst_node, dst_port;
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struct qrtr_sock *ipc;
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u32 src_node;
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int confirm;
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phdr = (const struct qrtr_hdr *)skb_transport_header(skb);
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src_node = le32_to_cpu(phdr->src_node_id);
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dst_node = le32_to_cpu(phdr->dst_node_id);
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dst_port = le32_to_cpu(phdr->dst_port_id);
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confirm = !!phdr->confirm_rx;
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qrtr_node_assign(node, src_node);
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ipc = qrtr_port_lookup(dst_port);
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if (!ipc) {
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kfree_skb(skb);
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} else {
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if (sock_queue_rcv_skb(&ipc->sk, skb))
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kfree_skb(skb);
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qrtr_port_put(ipc);
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}
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if (confirm) {
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skb = qrtr_alloc_resume_tx(dst_node, node->nid, dst_port);
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if (!skb)
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break;
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if (qrtr_node_enqueue(node, skb))
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break;
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}
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}
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}
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/**
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* qrtr_endpoint_register() - register a new endpoint
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* @ep: endpoint to register
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* @nid: desired node id; may be QRTR_EP_NID_AUTO for auto-assignment
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* Return: 0 on success; negative error code on failure
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*
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* The specified endpoint must have the xmit function pointer set on call.
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*/
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int qrtr_endpoint_register(struct qrtr_endpoint *ep, unsigned int nid)
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{
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struct qrtr_node *node;
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if (!ep || !ep->xmit)
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return -EINVAL;
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node = kzalloc(sizeof(*node), GFP_KERNEL);
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if (!node)
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return -ENOMEM;
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INIT_WORK(&node->work, qrtr_node_rx_work);
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kref_init(&node->ref);
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mutex_init(&node->ep_lock);
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skb_queue_head_init(&node->rx_queue);
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node->nid = QRTR_EP_NID_AUTO;
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node->ep = ep;
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qrtr_node_assign(node, nid);
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mutex_lock(&qrtr_node_lock);
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list_add(&node->item, &qrtr_all_nodes);
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mutex_unlock(&qrtr_node_lock);
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ep->node = node;
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return 0;
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}
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EXPORT_SYMBOL_GPL(qrtr_endpoint_register);
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/**
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* qrtr_endpoint_unregister - unregister endpoint
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* @ep: endpoint to unregister
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*/
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void qrtr_endpoint_unregister(struct qrtr_endpoint *ep)
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{
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struct qrtr_node *node = ep->node;
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mutex_lock(&node->ep_lock);
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node->ep = NULL;
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mutex_unlock(&node->ep_lock);
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qrtr_node_release(node);
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ep->node = NULL;
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}
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EXPORT_SYMBOL_GPL(qrtr_endpoint_unregister);
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/* Lookup socket by port.
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*
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* Callers must release with qrtr_port_put()
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*/
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static struct qrtr_sock *qrtr_port_lookup(int port)
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{
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struct qrtr_sock *ipc;
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if (port == QRTR_PORT_CTRL)
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port = 0;
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mutex_lock(&qrtr_port_lock);
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ipc = idr_find(&qrtr_ports, port);
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if (ipc)
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sock_hold(&ipc->sk);
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mutex_unlock(&qrtr_port_lock);
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return ipc;
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}
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/* Release acquired socket. */
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static void qrtr_port_put(struct qrtr_sock *ipc)
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{
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sock_put(&ipc->sk);
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}
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/* Remove port assignment. */
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static void qrtr_port_remove(struct qrtr_sock *ipc)
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{
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int port = ipc->us.sq_port;
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if (port == QRTR_PORT_CTRL)
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port = 0;
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__sock_put(&ipc->sk);
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mutex_lock(&qrtr_port_lock);
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idr_remove(&qrtr_ports, port);
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mutex_unlock(&qrtr_port_lock);
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}
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/* Assign port number to socket.
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*
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* Specify port in the integer pointed to by port, and it will be adjusted
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* on return as necesssary.
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*
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* Port may be:
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* 0: Assign ephemeral port in [QRTR_MIN_EPH_SOCKET, QRTR_MAX_EPH_SOCKET]
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* <QRTR_MIN_EPH_SOCKET: Specified; requires CAP_NET_ADMIN
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* >QRTR_MIN_EPH_SOCKET: Specified; available to all
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*/
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static int qrtr_port_assign(struct qrtr_sock *ipc, int *port)
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{
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int rc;
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mutex_lock(&qrtr_port_lock);
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if (!*port) {
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rc = idr_alloc(&qrtr_ports, ipc,
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QRTR_MIN_EPH_SOCKET, QRTR_MAX_EPH_SOCKET + 1,
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GFP_ATOMIC);
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if (rc >= 0)
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*port = rc;
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} else if (*port < QRTR_MIN_EPH_SOCKET && !capable(CAP_NET_ADMIN)) {
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rc = -EACCES;
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} else if (*port == QRTR_PORT_CTRL) {
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rc = idr_alloc(&qrtr_ports, ipc, 0, 1, GFP_ATOMIC);
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} else {
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rc = idr_alloc(&qrtr_ports, ipc, *port, *port + 1, GFP_ATOMIC);
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if (rc >= 0)
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*port = rc;
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}
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mutex_unlock(&qrtr_port_lock);
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if (rc == -ENOSPC)
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return -EADDRINUSE;
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else if (rc < 0)
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return rc;
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sock_hold(&ipc->sk);
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return 0;
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}
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/* Bind socket to address.
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*
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* Socket should be locked upon call.
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*/
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static int __qrtr_bind(struct socket *sock,
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const struct sockaddr_qrtr *addr, int zapped)
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{
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struct qrtr_sock *ipc = qrtr_sk(sock->sk);
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struct sock *sk = sock->sk;
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int port;
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int rc;
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/* rebinding ok */
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if (!zapped && addr->sq_port == ipc->us.sq_port)
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return 0;
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port = addr->sq_port;
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rc = qrtr_port_assign(ipc, &port);
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if (rc)
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return rc;
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/* unbind previous, if any */
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if (!zapped)
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qrtr_port_remove(ipc);
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ipc->us.sq_port = port;
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sock_reset_flag(sk, SOCK_ZAPPED);
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return 0;
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}
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/* Auto bind to an ephemeral port. */
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static int qrtr_autobind(struct socket *sock)
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{
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struct sock *sk = sock->sk;
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struct sockaddr_qrtr addr;
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if (!sock_flag(sk, SOCK_ZAPPED))
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return 0;
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addr.sq_family = AF_QIPCRTR;
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addr.sq_node = qrtr_local_nid;
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addr.sq_port = 0;
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return __qrtr_bind(sock, &addr, 1);
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}
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/* Bind socket to specified sockaddr. */
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static int qrtr_bind(struct socket *sock, struct sockaddr *saddr, int len)
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{
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DECLARE_SOCKADDR(struct sockaddr_qrtr *, addr, saddr);
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struct qrtr_sock *ipc = qrtr_sk(sock->sk);
|
|
struct sock *sk = sock->sk;
|
|
int rc;
|
|
|
|
if (len < sizeof(*addr) || addr->sq_family != AF_QIPCRTR)
|
|
return -EINVAL;
|
|
|
|
if (addr->sq_node != ipc->us.sq_node)
|
|
return -EINVAL;
|
|
|
|
lock_sock(sk);
|
|
rc = __qrtr_bind(sock, addr, sock_flag(sk, SOCK_ZAPPED));
|
|
release_sock(sk);
|
|
|
|
return rc;
|
|
}
|
|
|
|
/* Queue packet to local peer socket. */
|
|
static int qrtr_local_enqueue(struct qrtr_node *node, struct sk_buff *skb)
|
|
{
|
|
const struct qrtr_hdr *phdr;
|
|
struct qrtr_sock *ipc;
|
|
|
|
phdr = (const struct qrtr_hdr *)skb_transport_header(skb);
|
|
|
|
ipc = qrtr_port_lookup(le32_to_cpu(phdr->dst_port_id));
|
|
if (!ipc || &ipc->sk == skb->sk) { /* do not send to self */
|
|
kfree_skb(skb);
|
|
return -ENODEV;
|
|
}
|
|
|
|
if (sock_queue_rcv_skb(&ipc->sk, skb)) {
|
|
qrtr_port_put(ipc);
|
|
kfree_skb(skb);
|
|
return -ENOSPC;
|
|
}
|
|
|
|
qrtr_port_put(ipc);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* Queue packet for broadcast. */
|
|
static int qrtr_bcast_enqueue(struct qrtr_node *node, struct sk_buff *skb)
|
|
{
|
|
struct sk_buff *skbn;
|
|
|
|
mutex_lock(&qrtr_node_lock);
|
|
list_for_each_entry(node, &qrtr_all_nodes, item) {
|
|
skbn = skb_clone(skb, GFP_KERNEL);
|
|
if (!skbn)
|
|
break;
|
|
skb_set_owner_w(skbn, skb->sk);
|
|
qrtr_node_enqueue(node, skbn);
|
|
}
|
|
mutex_unlock(&qrtr_node_lock);
|
|
|
|
qrtr_local_enqueue(node, skb);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int qrtr_sendmsg(struct socket *sock, struct msghdr *msg, size_t len)
|
|
{
|
|
DECLARE_SOCKADDR(struct sockaddr_qrtr *, addr, msg->msg_name);
|
|
int (*enqueue_fn)(struct qrtr_node *, struct sk_buff *);
|
|
struct qrtr_sock *ipc = qrtr_sk(sock->sk);
|
|
struct sock *sk = sock->sk;
|
|
struct qrtr_node *node;
|
|
struct qrtr_hdr *hdr;
|
|
struct sk_buff *skb;
|
|
size_t plen;
|
|
int rc;
|
|
|
|
if (msg->msg_flags & ~(MSG_DONTWAIT))
|
|
return -EINVAL;
|
|
|
|
if (len > 65535)
|
|
return -EMSGSIZE;
|
|
|
|
lock_sock(sk);
|
|
|
|
if (addr) {
|
|
if (msg->msg_namelen < sizeof(*addr)) {
|
|
release_sock(sk);
|
|
return -EINVAL;
|
|
}
|
|
|
|
if (addr->sq_family != AF_QIPCRTR) {
|
|
release_sock(sk);
|
|
return -EINVAL;
|
|
}
|
|
|
|
rc = qrtr_autobind(sock);
|
|
if (rc) {
|
|
release_sock(sk);
|
|
return rc;
|
|
}
|
|
} else if (sk->sk_state == TCP_ESTABLISHED) {
|
|
addr = &ipc->peer;
|
|
} else {
|
|
release_sock(sk);
|
|
return -ENOTCONN;
|
|
}
|
|
|
|
node = NULL;
|
|
if (addr->sq_node == QRTR_NODE_BCAST) {
|
|
enqueue_fn = qrtr_bcast_enqueue;
|
|
} else if (addr->sq_node == ipc->us.sq_node) {
|
|
enqueue_fn = qrtr_local_enqueue;
|
|
} else {
|
|
enqueue_fn = qrtr_node_enqueue;
|
|
node = qrtr_node_lookup(addr->sq_node);
|
|
if (!node) {
|
|
release_sock(sk);
|
|
return -ECONNRESET;
|
|
}
|
|
}
|
|
|
|
plen = (len + 3) & ~3;
|
|
skb = sock_alloc_send_skb(sk, plen + QRTR_HDR_SIZE,
|
|
msg->msg_flags & MSG_DONTWAIT, &rc);
|
|
if (!skb)
|
|
goto out_node;
|
|
|
|
skb_reset_transport_header(skb);
|
|
skb_put(skb, len + QRTR_HDR_SIZE);
|
|
|
|
hdr = (struct qrtr_hdr *)skb_transport_header(skb);
|
|
hdr->version = cpu_to_le32(QRTR_PROTO_VER);
|
|
hdr->src_node_id = cpu_to_le32(ipc->us.sq_node);
|
|
hdr->src_port_id = cpu_to_le32(ipc->us.sq_port);
|
|
hdr->confirm_rx = cpu_to_le32(0);
|
|
hdr->size = cpu_to_le32(len);
|
|
hdr->dst_node_id = cpu_to_le32(addr->sq_node);
|
|
hdr->dst_port_id = cpu_to_le32(addr->sq_port);
|
|
|
|
rc = skb_copy_datagram_from_iter(skb, QRTR_HDR_SIZE,
|
|
&msg->msg_iter, len);
|
|
if (rc) {
|
|
kfree_skb(skb);
|
|
goto out_node;
|
|
}
|
|
|
|
if (plen != len) {
|
|
rc = skb_pad(skb, plen - len);
|
|
if (rc)
|
|
goto out_node;
|
|
skb_put(skb, plen - len);
|
|
}
|
|
|
|
if (ipc->us.sq_port == QRTR_PORT_CTRL) {
|
|
if (len < 4) {
|
|
rc = -EINVAL;
|
|
kfree_skb(skb);
|
|
goto out_node;
|
|
}
|
|
|
|
/* control messages already require the type as 'command' */
|
|
skb_copy_bits(skb, QRTR_HDR_SIZE, &hdr->type, 4);
|
|
} else {
|
|
hdr->type = cpu_to_le32(QRTR_TYPE_DATA);
|
|
}
|
|
|
|
rc = enqueue_fn(node, skb);
|
|
if (rc >= 0)
|
|
rc = len;
|
|
|
|
out_node:
|
|
qrtr_node_release(node);
|
|
release_sock(sk);
|
|
|
|
return rc;
|
|
}
|
|
|
|
static int qrtr_recvmsg(struct socket *sock, struct msghdr *msg,
|
|
size_t size, int flags)
|
|
{
|
|
DECLARE_SOCKADDR(struct sockaddr_qrtr *, addr, msg->msg_name);
|
|
const struct qrtr_hdr *phdr;
|
|
struct sock *sk = sock->sk;
|
|
struct sk_buff *skb;
|
|
int copied, rc;
|
|
|
|
lock_sock(sk);
|
|
|
|
if (sock_flag(sk, SOCK_ZAPPED)) {
|
|
release_sock(sk);
|
|
return -EADDRNOTAVAIL;
|
|
}
|
|
|
|
skb = skb_recv_datagram(sk, flags & ~MSG_DONTWAIT,
|
|
flags & MSG_DONTWAIT, &rc);
|
|
if (!skb) {
|
|
release_sock(sk);
|
|
return rc;
|
|
}
|
|
|
|
phdr = (const struct qrtr_hdr *)skb_transport_header(skb);
|
|
copied = le32_to_cpu(phdr->size);
|
|
if (copied > size) {
|
|
copied = size;
|
|
msg->msg_flags |= MSG_TRUNC;
|
|
}
|
|
|
|
rc = skb_copy_datagram_msg(skb, QRTR_HDR_SIZE, msg, copied);
|
|
if (rc < 0)
|
|
goto out;
|
|
rc = copied;
|
|
|
|
if (addr) {
|
|
addr->sq_family = AF_QIPCRTR;
|
|
addr->sq_node = le32_to_cpu(phdr->src_node_id);
|
|
addr->sq_port = le32_to_cpu(phdr->src_port_id);
|
|
msg->msg_namelen = sizeof(*addr);
|
|
}
|
|
|
|
out:
|
|
skb_free_datagram(sk, skb);
|
|
release_sock(sk);
|
|
|
|
return rc;
|
|
}
|
|
|
|
static int qrtr_connect(struct socket *sock, struct sockaddr *saddr,
|
|
int len, int flags)
|
|
{
|
|
DECLARE_SOCKADDR(struct sockaddr_qrtr *, addr, saddr);
|
|
struct qrtr_sock *ipc = qrtr_sk(sock->sk);
|
|
struct sock *sk = sock->sk;
|
|
int rc;
|
|
|
|
if (len < sizeof(*addr) || addr->sq_family != AF_QIPCRTR)
|
|
return -EINVAL;
|
|
|
|
lock_sock(sk);
|
|
|
|
sk->sk_state = TCP_CLOSE;
|
|
sock->state = SS_UNCONNECTED;
|
|
|
|
rc = qrtr_autobind(sock);
|
|
if (rc) {
|
|
release_sock(sk);
|
|
return rc;
|
|
}
|
|
|
|
ipc->peer = *addr;
|
|
sock->state = SS_CONNECTED;
|
|
sk->sk_state = TCP_ESTABLISHED;
|
|
|
|
release_sock(sk);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int qrtr_getname(struct socket *sock, struct sockaddr *saddr,
|
|
int *len, int peer)
|
|
{
|
|
struct qrtr_sock *ipc = qrtr_sk(sock->sk);
|
|
struct sockaddr_qrtr qaddr;
|
|
struct sock *sk = sock->sk;
|
|
|
|
lock_sock(sk);
|
|
if (peer) {
|
|
if (sk->sk_state != TCP_ESTABLISHED) {
|
|
release_sock(sk);
|
|
return -ENOTCONN;
|
|
}
|
|
|
|
qaddr = ipc->peer;
|
|
} else {
|
|
qaddr = ipc->us;
|
|
}
|
|
release_sock(sk);
|
|
|
|
*len = sizeof(qaddr);
|
|
qaddr.sq_family = AF_QIPCRTR;
|
|
|
|
memcpy(saddr, &qaddr, sizeof(qaddr));
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int qrtr_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
|
|
{
|
|
void __user *argp = (void __user *)arg;
|
|
struct qrtr_sock *ipc = qrtr_sk(sock->sk);
|
|
struct sock *sk = sock->sk;
|
|
struct sockaddr_qrtr *sq;
|
|
struct sk_buff *skb;
|
|
struct ifreq ifr;
|
|
long len = 0;
|
|
int rc = 0;
|
|
|
|
lock_sock(sk);
|
|
|
|
switch (cmd) {
|
|
case TIOCOUTQ:
|
|
len = sk->sk_sndbuf - sk_wmem_alloc_get(sk);
|
|
if (len < 0)
|
|
len = 0;
|
|
rc = put_user(len, (int __user *)argp);
|
|
break;
|
|
case TIOCINQ:
|
|
skb = skb_peek(&sk->sk_receive_queue);
|
|
if (skb)
|
|
len = skb->len - QRTR_HDR_SIZE;
|
|
rc = put_user(len, (int __user *)argp);
|
|
break;
|
|
case SIOCGIFADDR:
|
|
if (copy_from_user(&ifr, argp, sizeof(ifr))) {
|
|
rc = -EFAULT;
|
|
break;
|
|
}
|
|
|
|
sq = (struct sockaddr_qrtr *)&ifr.ifr_addr;
|
|
*sq = ipc->us;
|
|
if (copy_to_user(argp, &ifr, sizeof(ifr))) {
|
|
rc = -EFAULT;
|
|
break;
|
|
}
|
|
break;
|
|
case SIOCGSTAMP:
|
|
rc = sock_get_timestamp(sk, argp);
|
|
break;
|
|
case SIOCADDRT:
|
|
case SIOCDELRT:
|
|
case SIOCSIFADDR:
|
|
case SIOCGIFDSTADDR:
|
|
case SIOCSIFDSTADDR:
|
|
case SIOCGIFBRDADDR:
|
|
case SIOCSIFBRDADDR:
|
|
case SIOCGIFNETMASK:
|
|
case SIOCSIFNETMASK:
|
|
rc = -EINVAL;
|
|
break;
|
|
default:
|
|
rc = -ENOIOCTLCMD;
|
|
break;
|
|
}
|
|
|
|
release_sock(sk);
|
|
|
|
return rc;
|
|
}
|
|
|
|
static int qrtr_release(struct socket *sock)
|
|
{
|
|
struct sock *sk = sock->sk;
|
|
struct qrtr_sock *ipc;
|
|
|
|
if (!sk)
|
|
return 0;
|
|
|
|
lock_sock(sk);
|
|
|
|
ipc = qrtr_sk(sk);
|
|
sk->sk_shutdown = SHUTDOWN_MASK;
|
|
if (!sock_flag(sk, SOCK_DEAD))
|
|
sk->sk_state_change(sk);
|
|
|
|
sock_set_flag(sk, SOCK_DEAD);
|
|
sock->sk = NULL;
|
|
|
|
if (!sock_flag(sk, SOCK_ZAPPED))
|
|
qrtr_port_remove(ipc);
|
|
|
|
skb_queue_purge(&sk->sk_receive_queue);
|
|
|
|
release_sock(sk);
|
|
sock_put(sk);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct proto_ops qrtr_proto_ops = {
|
|
.owner = THIS_MODULE,
|
|
.family = AF_QIPCRTR,
|
|
.bind = qrtr_bind,
|
|
.connect = qrtr_connect,
|
|
.socketpair = sock_no_socketpair,
|
|
.accept = sock_no_accept,
|
|
.listen = sock_no_listen,
|
|
.sendmsg = qrtr_sendmsg,
|
|
.recvmsg = qrtr_recvmsg,
|
|
.getname = qrtr_getname,
|
|
.ioctl = qrtr_ioctl,
|
|
.poll = datagram_poll,
|
|
.shutdown = sock_no_shutdown,
|
|
.setsockopt = sock_no_setsockopt,
|
|
.getsockopt = sock_no_getsockopt,
|
|
.release = qrtr_release,
|
|
.mmap = sock_no_mmap,
|
|
.sendpage = sock_no_sendpage,
|
|
};
|
|
|
|
static struct proto qrtr_proto = {
|
|
.name = "QIPCRTR",
|
|
.owner = THIS_MODULE,
|
|
.obj_size = sizeof(struct qrtr_sock),
|
|
};
|
|
|
|
static int qrtr_create(struct net *net, struct socket *sock,
|
|
int protocol, int kern)
|
|
{
|
|
struct qrtr_sock *ipc;
|
|
struct sock *sk;
|
|
|
|
if (sock->type != SOCK_DGRAM)
|
|
return -EPROTOTYPE;
|
|
|
|
sk = sk_alloc(net, AF_QIPCRTR, GFP_KERNEL, &qrtr_proto, kern);
|
|
if (!sk)
|
|
return -ENOMEM;
|
|
|
|
sock_set_flag(sk, SOCK_ZAPPED);
|
|
|
|
sock_init_data(sock, sk);
|
|
sock->ops = &qrtr_proto_ops;
|
|
|
|
ipc = qrtr_sk(sk);
|
|
ipc->us.sq_family = AF_QIPCRTR;
|
|
ipc->us.sq_node = qrtr_local_nid;
|
|
ipc->us.sq_port = 0;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct nla_policy qrtr_policy[IFA_MAX + 1] = {
|
|
[IFA_LOCAL] = { .type = NLA_U32 },
|
|
};
|
|
|
|
static int qrtr_addr_doit(struct sk_buff *skb, struct nlmsghdr *nlh,
|
|
struct netlink_ext_ack *extack)
|
|
{
|
|
struct nlattr *tb[IFA_MAX + 1];
|
|
struct ifaddrmsg *ifm;
|
|
int rc;
|
|
|
|
if (!netlink_capable(skb, CAP_NET_ADMIN))
|
|
return -EPERM;
|
|
|
|
if (!netlink_capable(skb, CAP_SYS_ADMIN))
|
|
return -EPERM;
|
|
|
|
ASSERT_RTNL();
|
|
|
|
rc = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, qrtr_policy, extack);
|
|
if (rc < 0)
|
|
return rc;
|
|
|
|
ifm = nlmsg_data(nlh);
|
|
if (!tb[IFA_LOCAL])
|
|
return -EINVAL;
|
|
|
|
qrtr_local_nid = nla_get_u32(tb[IFA_LOCAL]);
|
|
return 0;
|
|
}
|
|
|
|
static const struct net_proto_family qrtr_family = {
|
|
.owner = THIS_MODULE,
|
|
.family = AF_QIPCRTR,
|
|
.create = qrtr_create,
|
|
};
|
|
|
|
static int __init qrtr_proto_init(void)
|
|
{
|
|
int rc;
|
|
|
|
rc = proto_register(&qrtr_proto, 1);
|
|
if (rc)
|
|
return rc;
|
|
|
|
rc = sock_register(&qrtr_family);
|
|
if (rc) {
|
|
proto_unregister(&qrtr_proto);
|
|
return rc;
|
|
}
|
|
|
|
rtnl_register(PF_QIPCRTR, RTM_NEWADDR, qrtr_addr_doit, NULL, NULL);
|
|
|
|
return 0;
|
|
}
|
|
module_init(qrtr_proto_init);
|
|
|
|
static void __exit qrtr_proto_fini(void)
|
|
{
|
|
rtnl_unregister(PF_QIPCRTR, RTM_NEWADDR);
|
|
sock_unregister(qrtr_family.family);
|
|
proto_unregister(&qrtr_proto);
|
|
}
|
|
module_exit(qrtr_proto_fini);
|
|
|
|
MODULE_DESCRIPTION("Qualcomm IPC-router driver");
|
|
MODULE_LICENSE("GPL v2");
|