mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-27 19:29:37 +00:00
![Aya Mahfouz](/assets/img/avatar_default.png)
Removes extra parentheses around bitwise left shift operations. The case handled is when resultant value is assigned to a variable. The issue was detected and resolved using the following coccinelle script: @@ expression e, e1; constant c; @@ e = -(e1 +e1 << -c); +c; @@ identifier i; constant c; type t; expression e; @@ t i = -(e +e << -c); +c; Signed-off-by: Aya Mahfouz <mahfouz.saif.elyazal@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
813 lines
19 KiB
C
813 lines
19 KiB
C
/* -----------------------------------------------------------------------------
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* Copyright (c) 2011 Ozmo Inc
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* Released under the GNU General Public License Version 2 (GPLv2).
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* -----------------------------------------------------------------------------
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*/
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#include <linux/module.h>
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#include <linux/timer.h>
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#include <linux/sched.h>
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#include <linux/netdevice.h>
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#include <linux/etherdevice.h>
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#include <linux/errno.h>
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#include <linux/ieee80211.h>
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#include <linux/slab.h>
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#include "ozdbg.h"
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#include "ozprotocol.h"
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#include "ozeltbuf.h"
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#include "ozpd.h"
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#include "ozproto.h"
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#include "ozusbsvc.h"
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#include "ozappif.h"
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#include <asm/unaligned.h>
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#include <linux/uaccess.h>
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#include <net/psnap.h>
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#define OZ_CF_CONN_SUCCESS 1
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#define OZ_CF_CONN_FAILURE 2
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#define OZ_DO_STOP 1
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#define OZ_DO_SLEEP 2
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struct oz_binding {
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struct packet_type ptype;
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char name[OZ_MAX_BINDING_LEN];
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struct list_head link;
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};
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/*
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* External variable
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*/
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DEFINE_SPINLOCK(g_polling_lock);
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/*
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* Static external variables.
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*/
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static LIST_HEAD(g_pd_list);
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static LIST_HEAD(g_binding);
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static DEFINE_SPINLOCK(g_binding_lock);
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static struct sk_buff_head g_rx_queue;
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static u8 g_session_id;
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static u16 g_apps = 0x1;
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static int g_processing_rx;
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struct kmem_cache *oz_elt_info_cache;
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struct kmem_cache *oz_tx_frame_cache;
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/*
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* Context: softirq-serialized
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*/
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static u8 oz_get_new_session_id(u8 exclude)
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{
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if (++g_session_id == 0)
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g_session_id = 1;
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if (g_session_id == exclude) {
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if (++g_session_id == 0)
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g_session_id = 1;
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}
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return g_session_id;
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}
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/*
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* Context: softirq-serialized
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*/
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static void oz_send_conn_rsp(struct oz_pd *pd, u8 status)
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{
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struct sk_buff *skb;
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struct net_device *dev = pd->net_dev;
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struct oz_hdr *oz_hdr;
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struct oz_elt *elt;
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struct oz_elt_connect_rsp *body;
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int sz = sizeof(struct oz_hdr) + sizeof(struct oz_elt) +
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sizeof(struct oz_elt_connect_rsp);
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skb = alloc_skb(sz + OZ_ALLOCATED_SPACE(dev), GFP_ATOMIC);
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if (skb == NULL)
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return;
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skb_reserve(skb, LL_RESERVED_SPACE(dev));
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skb_reset_network_header(skb);
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oz_hdr = (struct oz_hdr *)skb_put(skb, sz);
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elt = (struct oz_elt *)(oz_hdr+1);
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body = (struct oz_elt_connect_rsp *)(elt+1);
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skb->dev = dev;
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skb->protocol = htons(OZ_ETHERTYPE);
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/* Fill in device header */
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if (dev_hard_header(skb, dev, OZ_ETHERTYPE, pd->mac_addr,
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dev->dev_addr, skb->len) < 0) {
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kfree_skb(skb);
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return;
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}
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oz_hdr->control = OZ_PROTOCOL_VERSION<<OZ_VERSION_SHIFT;
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oz_hdr->last_pkt_num = 0;
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put_unaligned(0, &oz_hdr->pkt_num);
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elt->type = OZ_ELT_CONNECT_RSP;
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elt->length = sizeof(struct oz_elt_connect_rsp);
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memset(body, 0, sizeof(struct oz_elt_connect_rsp));
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body->status = status;
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if (status == 0) {
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body->mode = pd->mode;
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body->session_id = pd->session_id;
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put_unaligned(cpu_to_le16(pd->total_apps), &body->apps);
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}
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oz_dbg(ON, "TX: OZ_ELT_CONNECT_RSP %d", status);
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dev_queue_xmit(skb);
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}
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/*
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* Context: softirq-serialized
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*/
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static void pd_set_keepalive(struct oz_pd *pd, u8 kalive)
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{
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unsigned long keep_alive = kalive & OZ_KALIVE_VALUE_MASK;
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switch (kalive & OZ_KALIVE_TYPE_MASK) {
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case OZ_KALIVE_SPECIAL:
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pd->keep_alive = keep_alive * 1000*60*60*24*20;
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break;
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case OZ_KALIVE_SECS:
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pd->keep_alive = keep_alive*1000;
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break;
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case OZ_KALIVE_MINS:
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pd->keep_alive = keep_alive*1000*60;
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break;
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case OZ_KALIVE_HOURS:
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pd->keep_alive = keep_alive*1000*60*60;
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break;
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default:
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pd->keep_alive = 0;
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}
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oz_dbg(ON, "Keepalive = %lu mSec\n", pd->keep_alive);
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}
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/*
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* Context: softirq-serialized
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*/
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static void pd_set_presleep(struct oz_pd *pd, u8 presleep, u8 start_timer)
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{
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if (presleep)
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pd->presleep = presleep*100;
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else
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pd->presleep = OZ_PRESLEEP_TOUT;
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if (start_timer) {
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spin_unlock(&g_polling_lock);
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oz_timer_add(pd, OZ_TIMER_TOUT, pd->presleep);
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spin_lock(&g_polling_lock);
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}
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oz_dbg(ON, "Presleep time = %lu mSec\n", pd->presleep);
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}
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/*
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* Context: softirq-serialized
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*/
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static struct oz_pd *oz_connect_req(struct oz_pd *cur_pd, struct oz_elt *elt,
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const u8 *pd_addr, struct net_device *net_dev)
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{
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struct oz_pd *pd;
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struct oz_elt_connect_req *body =
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(struct oz_elt_connect_req *)(elt+1);
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u8 rsp_status = OZ_STATUS_SUCCESS;
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u8 stop_needed = 0;
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u16 new_apps = g_apps;
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struct net_device *old_net_dev = NULL;
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struct oz_pd *free_pd = NULL;
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if (cur_pd) {
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pd = cur_pd;
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spin_lock_bh(&g_polling_lock);
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} else {
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struct oz_pd *pd2 = NULL;
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struct list_head *e;
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pd = oz_pd_alloc(pd_addr);
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if (pd == NULL)
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return NULL;
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getnstimeofday(&pd->last_rx_timestamp);
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spin_lock_bh(&g_polling_lock);
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list_for_each(e, &g_pd_list) {
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pd2 = list_entry(e, struct oz_pd, link);
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if (ether_addr_equal(pd2->mac_addr, pd_addr)) {
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free_pd = pd;
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pd = pd2;
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break;
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}
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}
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if (pd != pd2)
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list_add_tail(&pd->link, &g_pd_list);
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}
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if (pd == NULL) {
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spin_unlock_bh(&g_polling_lock);
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return NULL;
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}
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if (pd->net_dev != net_dev) {
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old_net_dev = pd->net_dev;
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dev_hold(net_dev);
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pd->net_dev = net_dev;
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}
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oz_dbg(ON, "Host vendor: %d\n", body->host_vendor);
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pd->max_tx_size = OZ_MAX_TX_SIZE;
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pd->mode = body->mode;
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pd->pd_info = body->pd_info;
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if (pd->mode & OZ_F_ISOC_NO_ELTS) {
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pd->ms_per_isoc = body->ms_per_isoc;
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if (!pd->ms_per_isoc)
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pd->ms_per_isoc = 4;
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switch (body->ms_isoc_latency & OZ_LATENCY_MASK) {
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case OZ_ONE_MS_LATENCY:
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pd->isoc_latency = (body->ms_isoc_latency &
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~OZ_LATENCY_MASK) / pd->ms_per_isoc;
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break;
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case OZ_TEN_MS_LATENCY:
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pd->isoc_latency = ((body->ms_isoc_latency &
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~OZ_LATENCY_MASK) * 10) / pd->ms_per_isoc;
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break;
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default:
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pd->isoc_latency = OZ_MAX_TX_QUEUE_ISOC;
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}
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}
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if (body->max_len_div16)
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pd->max_tx_size = ((u16)body->max_len_div16)<<4;
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oz_dbg(ON, "Max frame:%u Ms per isoc:%u\n",
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pd->max_tx_size, pd->ms_per_isoc);
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pd->max_stream_buffering = 3*1024;
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pd->pulse_period = OZ_QUANTUM;
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pd_set_presleep(pd, body->presleep, 0);
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pd_set_keepalive(pd, body->keep_alive);
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new_apps &= le16_to_cpu(get_unaligned(&body->apps));
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if ((new_apps & 0x1) && (body->session_id)) {
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if (pd->session_id) {
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if (pd->session_id != body->session_id) {
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rsp_status = OZ_STATUS_SESSION_MISMATCH;
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goto done;
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}
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} else {
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new_apps &= ~0x1; /* Resume not permitted */
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pd->session_id =
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oz_get_new_session_id(body->session_id);
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}
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} else {
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if (pd->session_id && !body->session_id) {
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rsp_status = OZ_STATUS_SESSION_TEARDOWN;
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stop_needed = 1;
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} else {
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new_apps &= ~0x1; /* Resume not permitted */
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pd->session_id =
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oz_get_new_session_id(body->session_id);
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}
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}
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done:
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if (rsp_status == OZ_STATUS_SUCCESS) {
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u16 start_apps = new_apps & ~pd->total_apps & ~0x1;
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u16 stop_apps = pd->total_apps & ~new_apps & ~0x1;
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u16 resume_apps = new_apps & pd->paused_apps & ~0x1;
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spin_unlock_bh(&g_polling_lock);
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oz_pd_set_state(pd, OZ_PD_S_CONNECTED);
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oz_dbg(ON, "new_apps=0x%x total_apps=0x%x paused_apps=0x%x\n",
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new_apps, pd->total_apps, pd->paused_apps);
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if (start_apps) {
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if (oz_services_start(pd, start_apps, 0))
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rsp_status = OZ_STATUS_TOO_MANY_PDS;
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}
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if (resume_apps)
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if (oz_services_start(pd, resume_apps, 1))
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rsp_status = OZ_STATUS_TOO_MANY_PDS;
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if (stop_apps)
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oz_services_stop(pd, stop_apps, 0);
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oz_pd_request_heartbeat(pd);
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} else {
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spin_unlock_bh(&g_polling_lock);
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}
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oz_send_conn_rsp(pd, rsp_status);
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if (rsp_status != OZ_STATUS_SUCCESS) {
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if (stop_needed)
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oz_pd_stop(pd);
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oz_pd_put(pd);
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pd = NULL;
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}
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if (old_net_dev)
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dev_put(old_net_dev);
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if (free_pd)
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oz_pd_destroy(free_pd);
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return pd;
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}
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/*
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* Context: softirq-serialized
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*/
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static void oz_add_farewell(struct oz_pd *pd, u8 ep_num, u8 index,
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const u8 *report, u8 len)
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{
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struct oz_farewell *f;
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struct oz_farewell *f2;
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int found = 0;
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f = kmalloc(sizeof(struct oz_farewell) + len, GFP_ATOMIC);
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if (!f)
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return;
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f->ep_num = ep_num;
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f->index = index;
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f->len = len;
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memcpy(f->report, report, len);
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oz_dbg(ON, "RX: Adding farewell report\n");
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spin_lock(&g_polling_lock);
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list_for_each_entry(f2, &pd->farewell_list, link) {
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if ((f2->ep_num == ep_num) && (f2->index == index)) {
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found = 1;
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list_del(&f2->link);
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break;
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}
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}
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list_add_tail(&f->link, &pd->farewell_list);
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spin_unlock(&g_polling_lock);
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if (found)
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kfree(f2);
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}
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/*
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* Context: softirq-serialized
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*/
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static void oz_rx_frame(struct sk_buff *skb)
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{
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u8 *mac_hdr;
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u8 *src_addr;
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struct oz_elt *elt;
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int length;
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struct oz_pd *pd = NULL;
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struct oz_hdr *oz_hdr = (struct oz_hdr *)skb_network_header(skb);
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struct timespec current_time;
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int dup = 0;
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u32 pkt_num;
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oz_dbg(RX_FRAMES, "RX frame PN=0x%x LPN=0x%x control=0x%x\n",
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oz_hdr->pkt_num, oz_hdr->last_pkt_num, oz_hdr->control);
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mac_hdr = skb_mac_header(skb);
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src_addr = &mac_hdr[ETH_ALEN];
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length = skb->len;
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/* Check the version field */
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if (oz_get_prot_ver(oz_hdr->control) != OZ_PROTOCOL_VERSION) {
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oz_dbg(ON, "Incorrect protocol version: %d\n",
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oz_get_prot_ver(oz_hdr->control));
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goto done;
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}
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pkt_num = le32_to_cpu(get_unaligned(&oz_hdr->pkt_num));
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pd = oz_pd_find(src_addr);
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if (pd) {
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if (!(pd->state & OZ_PD_S_CONNECTED))
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oz_pd_set_state(pd, OZ_PD_S_CONNECTED);
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getnstimeofday(¤t_time);
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if ((current_time.tv_sec != pd->last_rx_timestamp.tv_sec) ||
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(pd->presleep < MSEC_PER_SEC)) {
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oz_timer_add(pd, OZ_TIMER_TOUT, pd->presleep);
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pd->last_rx_timestamp = current_time;
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}
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if (pkt_num != pd->last_rx_pkt_num) {
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pd->last_rx_pkt_num = pkt_num;
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} else {
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dup = 1;
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oz_dbg(ON, "Duplicate frame\n");
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}
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}
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if (pd && !dup && ((pd->mode & OZ_MODE_MASK) == OZ_MODE_TRIGGERED)) {
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oz_dbg(RX_FRAMES, "Received TRIGGER Frame\n");
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pd->last_sent_frame = &pd->tx_queue;
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if (oz_hdr->control & OZ_F_ACK) {
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/* Retire completed frames */
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oz_retire_tx_frames(pd, oz_hdr->last_pkt_num);
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}
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if ((oz_hdr->control & OZ_F_ACK_REQUESTED) &&
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(pd->state == OZ_PD_S_CONNECTED)) {
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int backlog = pd->nb_queued_frames;
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pd->trigger_pkt_num = pkt_num;
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/* Send queued frames */
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oz_send_queued_frames(pd, backlog);
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}
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}
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length -= sizeof(struct oz_hdr);
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elt = (struct oz_elt *)((u8 *)oz_hdr + sizeof(struct oz_hdr));
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while (length >= sizeof(struct oz_elt)) {
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length -= sizeof(struct oz_elt) + elt->length;
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if (length < 0)
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break;
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switch (elt->type) {
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case OZ_ELT_CONNECT_REQ:
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oz_dbg(ON, "RX: OZ_ELT_CONNECT_REQ\n");
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pd = oz_connect_req(pd, elt, src_addr, skb->dev);
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break;
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case OZ_ELT_DISCONNECT:
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oz_dbg(ON, "RX: OZ_ELT_DISCONNECT\n");
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if (pd)
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oz_pd_sleep(pd);
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break;
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case OZ_ELT_UPDATE_PARAM_REQ: {
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struct oz_elt_update_param *body =
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(struct oz_elt_update_param *)(elt + 1);
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oz_dbg(ON, "RX: OZ_ELT_UPDATE_PARAM_REQ\n");
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if (pd && (pd->state & OZ_PD_S_CONNECTED)) {
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spin_lock(&g_polling_lock);
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pd_set_keepalive(pd, body->keepalive);
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pd_set_presleep(pd, body->presleep, 1);
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spin_unlock(&g_polling_lock);
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}
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}
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break;
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case OZ_ELT_FAREWELL_REQ: {
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struct oz_elt_farewell *body =
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(struct oz_elt_farewell *)(elt + 1);
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oz_dbg(ON, "RX: OZ_ELT_FAREWELL_REQ\n");
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oz_add_farewell(pd, body->ep_num,
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body->index, body->report,
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elt->length + 1 - sizeof(*body));
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}
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break;
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case OZ_ELT_APP_DATA:
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if (pd && (pd->state & OZ_PD_S_CONNECTED)) {
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struct oz_app_hdr *app_hdr =
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(struct oz_app_hdr *)(elt+1);
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if (dup)
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break;
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oz_handle_app_elt(pd, app_hdr->app_id, elt);
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}
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break;
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default:
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oz_dbg(ON, "RX: Unknown elt %02x\n", elt->type);
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}
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elt = oz_next_elt(elt);
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}
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done:
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if (pd)
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oz_pd_put(pd);
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consume_skb(skb);
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}
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/*
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* Context: process
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*/
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void oz_protocol_term(void)
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{
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struct oz_binding *b, *t;
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/* Walk the list of bindings and remove each one.
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*/
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spin_lock_bh(&g_binding_lock);
|
|
list_for_each_entry_safe(b, t, &g_binding, link) {
|
|
list_del(&b->link);
|
|
spin_unlock_bh(&g_binding_lock);
|
|
dev_remove_pack(&b->ptype);
|
|
if (b->ptype.dev)
|
|
dev_put(b->ptype.dev);
|
|
kfree(b);
|
|
spin_lock_bh(&g_binding_lock);
|
|
}
|
|
spin_unlock_bh(&g_binding_lock);
|
|
/* Walk the list of PDs and stop each one. This causes the PD to be
|
|
* removed from the list so we can just pull each one from the head
|
|
* of the list.
|
|
*/
|
|
spin_lock_bh(&g_polling_lock);
|
|
while (!list_empty(&g_pd_list)) {
|
|
struct oz_pd *pd =
|
|
list_first_entry(&g_pd_list, struct oz_pd, link);
|
|
oz_pd_get(pd);
|
|
spin_unlock_bh(&g_polling_lock);
|
|
oz_pd_stop(pd);
|
|
oz_pd_put(pd);
|
|
spin_lock_bh(&g_polling_lock);
|
|
}
|
|
spin_unlock_bh(&g_polling_lock);
|
|
oz_dbg(ON, "Protocol stopped\n");
|
|
|
|
kmem_cache_destroy(oz_tx_frame_cache);
|
|
kmem_cache_destroy(oz_elt_info_cache);
|
|
}
|
|
|
|
/*
|
|
* Context: softirq
|
|
*/
|
|
void oz_pd_heartbeat_handler(unsigned long data)
|
|
{
|
|
struct oz_pd *pd = (struct oz_pd *)data;
|
|
u16 apps = 0;
|
|
|
|
spin_lock_bh(&g_polling_lock);
|
|
if (pd->state & OZ_PD_S_CONNECTED)
|
|
apps = pd->total_apps;
|
|
spin_unlock_bh(&g_polling_lock);
|
|
if (apps)
|
|
oz_pd_heartbeat(pd, apps);
|
|
oz_pd_put(pd);
|
|
}
|
|
|
|
/*
|
|
* Context: softirq
|
|
*/
|
|
void oz_pd_timeout_handler(unsigned long data)
|
|
{
|
|
int type;
|
|
struct oz_pd *pd = (struct oz_pd *)data;
|
|
|
|
spin_lock_bh(&g_polling_lock);
|
|
type = pd->timeout_type;
|
|
spin_unlock_bh(&g_polling_lock);
|
|
switch (type) {
|
|
case OZ_TIMER_TOUT:
|
|
oz_pd_sleep(pd);
|
|
break;
|
|
case OZ_TIMER_STOP:
|
|
oz_pd_stop(pd);
|
|
break;
|
|
}
|
|
oz_pd_put(pd);
|
|
}
|
|
|
|
/*
|
|
* Context: Interrupt
|
|
*/
|
|
enum hrtimer_restart oz_pd_heartbeat_event(struct hrtimer *timer)
|
|
{
|
|
struct oz_pd *pd;
|
|
|
|
pd = container_of(timer, struct oz_pd, heartbeat);
|
|
hrtimer_forward_now(timer, ktime_set(pd->pulse_period /
|
|
MSEC_PER_SEC, (pd->pulse_period % MSEC_PER_SEC) * NSEC_PER_MSEC));
|
|
oz_pd_get(pd);
|
|
tasklet_schedule(&pd->heartbeat_tasklet);
|
|
return HRTIMER_RESTART;
|
|
}
|
|
|
|
/*
|
|
* Context: Interrupt
|
|
*/
|
|
enum hrtimer_restart oz_pd_timeout_event(struct hrtimer *timer)
|
|
{
|
|
struct oz_pd *pd;
|
|
|
|
pd = container_of(timer, struct oz_pd, timeout);
|
|
oz_pd_get(pd);
|
|
tasklet_schedule(&pd->timeout_tasklet);
|
|
return HRTIMER_NORESTART;
|
|
}
|
|
|
|
/*
|
|
* Context: softirq or process
|
|
*/
|
|
void oz_timer_add(struct oz_pd *pd, int type, unsigned long due_time)
|
|
{
|
|
spin_lock_bh(&g_polling_lock);
|
|
switch (type) {
|
|
case OZ_TIMER_TOUT:
|
|
case OZ_TIMER_STOP:
|
|
if (hrtimer_active(&pd->timeout)) {
|
|
hrtimer_set_expires(&pd->timeout, ktime_set(due_time /
|
|
MSEC_PER_SEC, (due_time % MSEC_PER_SEC) *
|
|
NSEC_PER_MSEC));
|
|
hrtimer_start_expires(&pd->timeout, HRTIMER_MODE_REL);
|
|
} else {
|
|
hrtimer_start(&pd->timeout, ktime_set(due_time /
|
|
MSEC_PER_SEC, (due_time % MSEC_PER_SEC) *
|
|
NSEC_PER_MSEC), HRTIMER_MODE_REL);
|
|
}
|
|
pd->timeout_type = type;
|
|
break;
|
|
case OZ_TIMER_HEARTBEAT:
|
|
if (!hrtimer_active(&pd->heartbeat))
|
|
hrtimer_start(&pd->heartbeat, ktime_set(due_time /
|
|
MSEC_PER_SEC, (due_time % MSEC_PER_SEC) *
|
|
NSEC_PER_MSEC), HRTIMER_MODE_REL);
|
|
break;
|
|
}
|
|
spin_unlock_bh(&g_polling_lock);
|
|
}
|
|
|
|
/*
|
|
* Context: softirq or process
|
|
*/
|
|
void oz_pd_request_heartbeat(struct oz_pd *pd)
|
|
{
|
|
oz_timer_add(pd, OZ_TIMER_HEARTBEAT, pd->pulse_period > 0 ?
|
|
pd->pulse_period : OZ_QUANTUM);
|
|
}
|
|
|
|
/*
|
|
* Context: softirq or process
|
|
*/
|
|
struct oz_pd *oz_pd_find(const u8 *mac_addr)
|
|
{
|
|
struct oz_pd *pd;
|
|
|
|
spin_lock_bh(&g_polling_lock);
|
|
list_for_each_entry(pd, &g_pd_list, link) {
|
|
if (ether_addr_equal(pd->mac_addr, mac_addr)) {
|
|
oz_pd_get(pd);
|
|
spin_unlock_bh(&g_polling_lock);
|
|
return pd;
|
|
}
|
|
}
|
|
spin_unlock_bh(&g_polling_lock);
|
|
return NULL;
|
|
}
|
|
|
|
/*
|
|
* Context: process
|
|
*/
|
|
void oz_app_enable(int app_id, int enable)
|
|
{
|
|
if (app_id < OZ_NB_APPS) {
|
|
spin_lock_bh(&g_polling_lock);
|
|
if (enable)
|
|
g_apps |= (1<<app_id);
|
|
else
|
|
g_apps &= ~(1<<app_id);
|
|
spin_unlock_bh(&g_polling_lock);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Context: softirq
|
|
*/
|
|
static int oz_pkt_recv(struct sk_buff *skb, struct net_device *dev,
|
|
struct packet_type *pt, struct net_device *orig_dev)
|
|
{
|
|
skb = skb_share_check(skb, GFP_ATOMIC);
|
|
if (skb == NULL)
|
|
return 0;
|
|
spin_lock_bh(&g_rx_queue.lock);
|
|
if (g_processing_rx) {
|
|
/* We already hold the lock so use __ variant.
|
|
*/
|
|
__skb_queue_head(&g_rx_queue, skb);
|
|
spin_unlock_bh(&g_rx_queue.lock);
|
|
} else {
|
|
g_processing_rx = 1;
|
|
do {
|
|
|
|
spin_unlock_bh(&g_rx_queue.lock);
|
|
oz_rx_frame(skb);
|
|
spin_lock_bh(&g_rx_queue.lock);
|
|
if (skb_queue_empty(&g_rx_queue)) {
|
|
g_processing_rx = 0;
|
|
spin_unlock_bh(&g_rx_queue.lock);
|
|
break;
|
|
}
|
|
/* We already hold the lock so use __ variant.
|
|
*/
|
|
skb = __skb_dequeue(&g_rx_queue);
|
|
} while (1);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Context: process
|
|
*/
|
|
void oz_binding_add(const char *net_dev)
|
|
{
|
|
struct oz_binding *binding;
|
|
|
|
binding = kzalloc(sizeof(struct oz_binding), GFP_KERNEL);
|
|
if (!binding)
|
|
return;
|
|
|
|
binding->ptype.type = htons(OZ_ETHERTYPE);
|
|
binding->ptype.func = oz_pkt_recv;
|
|
if (net_dev && *net_dev) {
|
|
memcpy(binding->name, net_dev, OZ_MAX_BINDING_LEN);
|
|
oz_dbg(ON, "Adding binding: %s\n", net_dev);
|
|
binding->ptype.dev = dev_get_by_name(&init_net, net_dev);
|
|
if (binding->ptype.dev == NULL) {
|
|
oz_dbg(ON, "Netdev %s not found\n", net_dev);
|
|
kfree(binding);
|
|
return;
|
|
}
|
|
}
|
|
dev_add_pack(&binding->ptype);
|
|
spin_lock_bh(&g_binding_lock);
|
|
list_add_tail(&binding->link, &g_binding);
|
|
spin_unlock_bh(&g_binding_lock);
|
|
}
|
|
|
|
/*
|
|
* Context: process
|
|
*/
|
|
static void pd_stop_all_for_device(struct net_device *net_dev)
|
|
{
|
|
LIST_HEAD(h);
|
|
struct oz_pd *pd;
|
|
struct oz_pd *n;
|
|
|
|
spin_lock_bh(&g_polling_lock);
|
|
list_for_each_entry_safe(pd, n, &g_pd_list, link) {
|
|
if (pd->net_dev == net_dev) {
|
|
list_move(&pd->link, &h);
|
|
oz_pd_get(pd);
|
|
}
|
|
}
|
|
spin_unlock_bh(&g_polling_lock);
|
|
while (!list_empty(&h)) {
|
|
pd = list_first_entry(&h, struct oz_pd, link);
|
|
oz_pd_stop(pd);
|
|
oz_pd_put(pd);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Context: process
|
|
*/
|
|
void oz_binding_remove(const char *net_dev)
|
|
{
|
|
struct oz_binding *binding;
|
|
int found = 0;
|
|
|
|
oz_dbg(ON, "Removing binding: %s\n", net_dev);
|
|
spin_lock_bh(&g_binding_lock);
|
|
list_for_each_entry(binding, &g_binding, link) {
|
|
if (strncmp(binding->name, net_dev, OZ_MAX_BINDING_LEN) == 0) {
|
|
oz_dbg(ON, "Binding '%s' found\n", net_dev);
|
|
found = 1;
|
|
break;
|
|
}
|
|
}
|
|
spin_unlock_bh(&g_binding_lock);
|
|
if (found) {
|
|
dev_remove_pack(&binding->ptype);
|
|
if (binding->ptype.dev) {
|
|
dev_put(binding->ptype.dev);
|
|
pd_stop_all_for_device(binding->ptype.dev);
|
|
}
|
|
list_del(&binding->link);
|
|
kfree(binding);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Context: process
|
|
*/
|
|
static char *oz_get_next_device_name(char *s, char *dname, int max_size)
|
|
{
|
|
while (*s == ',')
|
|
s++;
|
|
while (*s && (*s != ',') && max_size > 1) {
|
|
*dname++ = *s++;
|
|
max_size--;
|
|
}
|
|
*dname = 0;
|
|
return s;
|
|
}
|
|
|
|
/*
|
|
* Context: process
|
|
*/
|
|
int oz_protocol_init(char *devs)
|
|
{
|
|
oz_elt_info_cache = KMEM_CACHE(oz_elt_info, 0);
|
|
if (!oz_elt_info_cache)
|
|
return -ENOMEM;
|
|
|
|
oz_tx_frame_cache = KMEM_CACHE(oz_tx_frame, 0);
|
|
if (!oz_tx_frame_cache) {
|
|
kmem_cache_destroy(oz_elt_info_cache);
|
|
return -ENOMEM;
|
|
}
|
|
|
|
skb_queue_head_init(&g_rx_queue);
|
|
if (devs[0] == '*') {
|
|
oz_binding_add(NULL);
|
|
} else {
|
|
char d[32];
|
|
|
|
while (*devs) {
|
|
devs = oz_get_next_device_name(devs, d, sizeof(d));
|
|
if (d[0])
|
|
oz_binding_add(d);
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Context: process
|
|
*/
|
|
int oz_get_pd_list(struct oz_mac_addr *addr, int max_count)
|
|
{
|
|
struct oz_pd *pd;
|
|
int count = 0;
|
|
|
|
spin_lock_bh(&g_polling_lock);
|
|
list_for_each_entry(pd, &g_pd_list, link) {
|
|
if (count >= max_count)
|
|
break;
|
|
ether_addr_copy((u8 *)&addr[count++], pd->mac_addr);
|
|
}
|
|
spin_unlock_bh(&g_polling_lock);
|
|
return count;
|
|
}
|
|
|