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133b94245c
Signed-off-by: Fengguang Wu <fengguang.wu@intel.com> Acked-by: Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2034 lines
54 KiB
C
2034 lines
54 KiB
C
/*********************************************************************
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*
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* Filename: irlmp.c
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* Version: 1.0
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* Description: IrDA Link Management Protocol (LMP) layer
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* Status: Stable.
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* Author: Dag Brattli <dagb@cs.uit.no>
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* Created at: Sun Aug 17 20:54:32 1997
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* Modified at: Wed Jan 5 11:26:03 2000
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* Modified by: Dag Brattli <dagb@cs.uit.no>
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*
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* Copyright (c) 1998-2000 Dag Brattli <dagb@cs.uit.no>,
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* All Rights Reserved.
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* Copyright (c) 2000-2003 Jean Tourrilhes <jt@hpl.hp.com>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of
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* the License, or (at your option) any later version.
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*
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* Neither Dag Brattli nor University of Tromsø admit liability nor
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* provide warranty for any of this software. This material is
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* provided "AS-IS" and at no charge.
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*
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********************************************************************/
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#include <linux/module.h>
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#include <linux/slab.h>
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#include <linux/string.h>
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#include <linux/skbuff.h>
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#include <linux/types.h>
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#include <linux/proc_fs.h>
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#include <linux/init.h>
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#include <linux/kmod.h>
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#include <linux/random.h>
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#include <linux/seq_file.h>
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#include <net/irda/irda.h>
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#include <net/irda/timer.h>
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#include <net/irda/qos.h>
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#include <net/irda/irlap.h>
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#include <net/irda/iriap.h>
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#include <net/irda/irlmp.h>
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#include <net/irda/irlmp_frame.h>
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#include <asm/unaligned.h>
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static __u8 irlmp_find_free_slsap(void);
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static int irlmp_slsap_inuse(__u8 slsap_sel);
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/* Master structure */
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struct irlmp_cb *irlmp = NULL;
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/* These can be altered by the sysctl interface */
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int sysctl_discovery = 0;
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int sysctl_discovery_timeout = 3; /* 3 seconds by default */
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int sysctl_discovery_slots = 6; /* 6 slots by default */
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int sysctl_lap_keepalive_time = LM_IDLE_TIMEOUT * 1000 / HZ;
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char sysctl_devname[65];
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static const char *irlmp_reasons[] = {
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"ERROR, NOT USED",
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"LM_USER_REQUEST",
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"LM_LAP_DISCONNECT",
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"LM_CONNECT_FAILURE",
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"LM_LAP_RESET",
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"LM_INIT_DISCONNECT",
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"ERROR, NOT USED",
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"UNKNOWN",
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};
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const char *irlmp_reason_str(LM_REASON reason)
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{
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reason = min_t(size_t, reason, ARRAY_SIZE(irlmp_reasons) - 1);
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return irlmp_reasons[reason];
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}
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/*
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* Function irlmp_init (void)
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*
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* Create (allocate) the main IrLMP structure
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*
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*/
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int __init irlmp_init(void)
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{
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IRDA_DEBUG(1, "%s()\n", __func__);
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/* Initialize the irlmp structure. */
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irlmp = kzalloc( sizeof(struct irlmp_cb), GFP_KERNEL);
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if (irlmp == NULL)
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return -ENOMEM;
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irlmp->magic = LMP_MAGIC;
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irlmp->clients = hashbin_new(HB_LOCK);
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irlmp->services = hashbin_new(HB_LOCK);
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irlmp->links = hashbin_new(HB_LOCK);
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irlmp->unconnected_lsaps = hashbin_new(HB_LOCK);
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irlmp->cachelog = hashbin_new(HB_NOLOCK);
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if ((irlmp->clients == NULL) ||
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(irlmp->services == NULL) ||
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(irlmp->links == NULL) ||
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(irlmp->unconnected_lsaps == NULL) ||
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(irlmp->cachelog == NULL)) {
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return -ENOMEM;
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}
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spin_lock_init(&irlmp->cachelog->hb_spinlock);
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irlmp->last_lsap_sel = 0x0f; /* Reserved 0x00-0x0f */
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strcpy(sysctl_devname, "Linux");
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init_timer(&irlmp->discovery_timer);
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/* Do discovery every 3 seconds, conditionally */
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if (sysctl_discovery)
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irlmp_start_discovery_timer(irlmp,
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sysctl_discovery_timeout*HZ);
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return 0;
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}
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/*
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* Function irlmp_cleanup (void)
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*
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* Remove IrLMP layer
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*
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*/
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void irlmp_cleanup(void)
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{
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/* Check for main structure */
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IRDA_ASSERT(irlmp != NULL, return;);
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IRDA_ASSERT(irlmp->magic == LMP_MAGIC, return;);
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del_timer(&irlmp->discovery_timer);
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hashbin_delete(irlmp->links, (FREE_FUNC) kfree);
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hashbin_delete(irlmp->unconnected_lsaps, (FREE_FUNC) kfree);
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hashbin_delete(irlmp->clients, (FREE_FUNC) kfree);
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hashbin_delete(irlmp->services, (FREE_FUNC) kfree);
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hashbin_delete(irlmp->cachelog, (FREE_FUNC) kfree);
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/* De-allocate main structure */
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kfree(irlmp);
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irlmp = NULL;
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}
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/*
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* Function irlmp_open_lsap (slsap, notify)
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*
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* Register with IrLMP and create a local LSAP,
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* returns handle to LSAP.
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*/
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struct lsap_cb *irlmp_open_lsap(__u8 slsap_sel, notify_t *notify, __u8 pid)
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{
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struct lsap_cb *self;
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IRDA_ASSERT(notify != NULL, return NULL;);
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IRDA_ASSERT(irlmp != NULL, return NULL;);
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IRDA_ASSERT(irlmp->magic == LMP_MAGIC, return NULL;);
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IRDA_ASSERT(notify->instance != NULL, return NULL;);
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/* Does the client care which Source LSAP selector it gets? */
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if (slsap_sel == LSAP_ANY) {
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slsap_sel = irlmp_find_free_slsap();
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if (!slsap_sel)
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return NULL;
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} else if (irlmp_slsap_inuse(slsap_sel))
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return NULL;
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/* Allocate new instance of a LSAP connection */
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self = kzalloc(sizeof(struct lsap_cb), GFP_ATOMIC);
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if (self == NULL) {
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IRDA_ERROR("%s: can't allocate memory\n", __func__);
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return NULL;
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}
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self->magic = LMP_LSAP_MAGIC;
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self->slsap_sel = slsap_sel;
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/* Fix connectionless LSAP's */
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if (slsap_sel == LSAP_CONNLESS) {
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#ifdef CONFIG_IRDA_ULTRA
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self->dlsap_sel = LSAP_CONNLESS;
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self->pid = pid;
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#endif /* CONFIG_IRDA_ULTRA */
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} else
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self->dlsap_sel = LSAP_ANY;
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/* self->connected = FALSE; -> already NULL via memset() */
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init_timer(&self->watchdog_timer);
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self->notify = *notify;
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self->lsap_state = LSAP_DISCONNECTED;
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/* Insert into queue of unconnected LSAPs */
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hashbin_insert(irlmp->unconnected_lsaps, (irda_queue_t *) self,
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(long) self, NULL);
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return self;
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}
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EXPORT_SYMBOL(irlmp_open_lsap);
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/*
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* Function __irlmp_close_lsap (self)
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*
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* Remove an instance of LSAP
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*/
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static void __irlmp_close_lsap(struct lsap_cb *self)
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{
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IRDA_DEBUG(4, "%s()\n", __func__);
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IRDA_ASSERT(self != NULL, return;);
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IRDA_ASSERT(self->magic == LMP_LSAP_MAGIC, return;);
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/*
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* Set some of the variables to preset values
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*/
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self->magic = 0;
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del_timer(&self->watchdog_timer); /* Important! */
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if (self->conn_skb)
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dev_kfree_skb(self->conn_skb);
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kfree(self);
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}
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/*
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* Function irlmp_close_lsap (self)
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*
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* Close and remove LSAP
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*
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*/
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void irlmp_close_lsap(struct lsap_cb *self)
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{
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struct lap_cb *lap;
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struct lsap_cb *lsap = NULL;
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IRDA_ASSERT(self != NULL, return;);
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IRDA_ASSERT(self->magic == LMP_LSAP_MAGIC, return;);
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/*
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* Find out if we should remove this LSAP from a link or from the
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* list of unconnected lsaps (not associated with a link)
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*/
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lap = self->lap;
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if (lap) {
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IRDA_ASSERT(lap->magic == LMP_LAP_MAGIC, return;);
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/* We might close a LSAP before it has completed the
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* connection setup. In those case, higher layers won't
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* send a proper disconnect request. Harmless, except
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* that we will forget to close LAP... - Jean II */
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if(self->lsap_state != LSAP_DISCONNECTED) {
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self->lsap_state = LSAP_DISCONNECTED;
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irlmp_do_lap_event(self->lap,
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LM_LAP_DISCONNECT_REQUEST, NULL);
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}
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/* Now, remove from the link */
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lsap = hashbin_remove(lap->lsaps, (long) self, NULL);
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#ifdef CONFIG_IRDA_CACHE_LAST_LSAP
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lap->cache.valid = FALSE;
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#endif
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}
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self->lap = NULL;
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/* Check if we found the LSAP! If not then try the unconnected lsaps */
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if (!lsap) {
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lsap = hashbin_remove(irlmp->unconnected_lsaps, (long) self,
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NULL);
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}
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if (!lsap) {
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IRDA_DEBUG(0,
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"%s(), Looks like somebody has removed me already!\n",
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__func__);
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return;
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}
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__irlmp_close_lsap(self);
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}
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EXPORT_SYMBOL(irlmp_close_lsap);
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/*
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* Function irlmp_register_irlap (saddr, notify)
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*
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* Register IrLAP layer with IrLMP. There is possible to have multiple
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* instances of the IrLAP layer, each connected to different IrDA ports
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*
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*/
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void irlmp_register_link(struct irlap_cb *irlap, __u32 saddr, notify_t *notify)
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{
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struct lap_cb *lap;
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IRDA_ASSERT(irlmp != NULL, return;);
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IRDA_ASSERT(irlmp->magic == LMP_MAGIC, return;);
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IRDA_ASSERT(notify != NULL, return;);
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/*
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* Allocate new instance of a LSAP connection
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*/
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lap = kzalloc(sizeof(struct lap_cb), GFP_KERNEL);
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if (lap == NULL) {
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IRDA_ERROR("%s: unable to kmalloc\n", __func__);
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return;
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}
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lap->irlap = irlap;
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lap->magic = LMP_LAP_MAGIC;
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lap->saddr = saddr;
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lap->daddr = DEV_ADDR_ANY;
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#ifdef CONFIG_IRDA_CACHE_LAST_LSAP
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lap->cache.valid = FALSE;
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#endif
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lap->lsaps = hashbin_new(HB_LOCK);
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if (lap->lsaps == NULL) {
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IRDA_WARNING("%s(), unable to kmalloc lsaps\n", __func__);
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kfree(lap);
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return;
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}
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lap->lap_state = LAP_STANDBY;
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init_timer(&lap->idle_timer);
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/*
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* Insert into queue of LMP links
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*/
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hashbin_insert(irlmp->links, (irda_queue_t *) lap, lap->saddr, NULL);
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/*
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* We set only this variable so IrLAP can tell us on which link the
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* different events happened on
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*/
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irda_notify_init(notify);
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notify->instance = lap;
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}
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/*
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* Function irlmp_unregister_irlap (saddr)
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*
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* IrLAP layer has been removed!
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*
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*/
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void irlmp_unregister_link(__u32 saddr)
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{
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struct lap_cb *link;
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IRDA_DEBUG(4, "%s()\n", __func__);
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/* We must remove ourselves from the hashbin *first*. This ensure
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* that no more LSAPs will be open on this link and no discovery
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* will be triggered anymore. Jean II */
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link = hashbin_remove(irlmp->links, saddr, NULL);
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if (link) {
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IRDA_ASSERT(link->magic == LMP_LAP_MAGIC, return;);
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/* Kill all the LSAPs on this link. Jean II */
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link->reason = LAP_DISC_INDICATION;
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link->daddr = DEV_ADDR_ANY;
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irlmp_do_lap_event(link, LM_LAP_DISCONNECT_INDICATION, NULL);
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/* Remove all discoveries discovered at this link */
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irlmp_expire_discoveries(irlmp->cachelog, link->saddr, TRUE);
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/* Final cleanup */
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del_timer(&link->idle_timer);
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link->magic = 0;
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hashbin_delete(link->lsaps, (FREE_FUNC) __irlmp_close_lsap);
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kfree(link);
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}
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}
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/*
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* Function irlmp_connect_request (handle, dlsap, userdata)
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*
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* Connect with a peer LSAP
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*
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*/
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int irlmp_connect_request(struct lsap_cb *self, __u8 dlsap_sel,
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__u32 saddr, __u32 daddr,
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struct qos_info *qos, struct sk_buff *userdata)
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{
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struct sk_buff *tx_skb = userdata;
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struct lap_cb *lap;
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struct lsap_cb *lsap;
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int ret;
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IRDA_ASSERT(self != NULL, return -EBADR;);
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IRDA_ASSERT(self->magic == LMP_LSAP_MAGIC, return -EBADR;);
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IRDA_DEBUG(2,
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"%s(), slsap_sel=%02x, dlsap_sel=%02x, saddr=%08x, daddr=%08x\n",
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__func__, self->slsap_sel, dlsap_sel, saddr, daddr);
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if (test_bit(0, &self->connected)) {
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ret = -EISCONN;
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goto err;
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}
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/* Client must supply destination device address */
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if (!daddr) {
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ret = -EINVAL;
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goto err;
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}
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/* Any userdata? */
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if (tx_skb == NULL) {
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tx_skb = alloc_skb(LMP_MAX_HEADER, GFP_ATOMIC);
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if (!tx_skb)
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return -ENOMEM;
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skb_reserve(tx_skb, LMP_MAX_HEADER);
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}
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|
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/* Make room for MUX control header (3 bytes) */
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IRDA_ASSERT(skb_headroom(tx_skb) >= LMP_CONTROL_HEADER, return -1;);
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skb_push(tx_skb, LMP_CONTROL_HEADER);
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self->dlsap_sel = dlsap_sel;
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|
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/*
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* Find the link to where we should try to connect since there may
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* be more than one IrDA port on this machine. If the client has
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* passed us the saddr (and already knows which link to use), then
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* we use that to find the link, if not then we have to look in the
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* discovery log and check if any of the links has discovered a
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* device with the given daddr
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*/
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if ((!saddr) || (saddr == DEV_ADDR_ANY)) {
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discovery_t *discovery;
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unsigned long flags;
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spin_lock_irqsave(&irlmp->cachelog->hb_spinlock, flags);
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if (daddr != DEV_ADDR_ANY)
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discovery = hashbin_find(irlmp->cachelog, daddr, NULL);
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else {
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IRDA_DEBUG(2, "%s(), no daddr\n", __func__);
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discovery = (discovery_t *)
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hashbin_get_first(irlmp->cachelog);
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}
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|
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if (discovery) {
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saddr = discovery->data.saddr;
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daddr = discovery->data.daddr;
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}
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spin_unlock_irqrestore(&irlmp->cachelog->hb_spinlock, flags);
|
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}
|
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lap = hashbin_lock_find(irlmp->links, saddr, NULL);
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if (lap == NULL) {
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IRDA_DEBUG(1, "%s(), Unable to find a usable link!\n", __func__);
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ret = -EHOSTUNREACH;
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goto err;
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}
|
|
|
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/* Check if LAP is disconnected or already connected */
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if (lap->daddr == DEV_ADDR_ANY)
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lap->daddr = daddr;
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else if (lap->daddr != daddr) {
|
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/* Check if some LSAPs are active on this LAP */
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if (HASHBIN_GET_SIZE(lap->lsaps) == 0) {
|
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/* No active connection, but LAP hasn't been
|
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* disconnected yet (waiting for timeout in LAP).
|
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* Maybe we could give LAP a bit of help in this case.
|
|
*/
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IRDA_DEBUG(0, "%s(), sorry, but I'm waiting for LAP to timeout!\n", __func__);
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ret = -EAGAIN;
|
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goto err;
|
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}
|
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|
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/* LAP is already connected to a different node, and LAP
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* can only talk to one node at a time */
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IRDA_DEBUG(0, "%s(), sorry, but link is busy!\n", __func__);
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ret = -EBUSY;
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goto err;
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}
|
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self->lap = lap;
|
|
|
|
/*
|
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* Remove LSAP from list of unconnected LSAPs and insert it into the
|
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* list of connected LSAPs for the particular link
|
|
*/
|
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lsap = hashbin_remove(irlmp->unconnected_lsaps, (long) self, NULL);
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|
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IRDA_ASSERT(lsap != NULL, return -1;);
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IRDA_ASSERT(lsap->magic == LMP_LSAP_MAGIC, return -1;);
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IRDA_ASSERT(lsap->lap != NULL, return -1;);
|
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IRDA_ASSERT(lsap->lap->magic == LMP_LAP_MAGIC, return -1;);
|
|
|
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hashbin_insert(self->lap->lsaps, (irda_queue_t *) self, (long) self,
|
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NULL);
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|
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set_bit(0, &self->connected); /* TRUE */
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|
|
|
/*
|
|
* User supplied qos specifications?
|
|
*/
|
|
if (qos)
|
|
self->qos = *qos;
|
|
|
|
irlmp_do_lsap_event(self, LM_CONNECT_REQUEST, tx_skb);
|
|
|
|
/* Drop reference count - see irlap_data_request(). */
|
|
dev_kfree_skb(tx_skb);
|
|
|
|
return 0;
|
|
|
|
err:
|
|
/* Cleanup */
|
|
if(tx_skb)
|
|
dev_kfree_skb(tx_skb);
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL(irlmp_connect_request);
|
|
|
|
/*
|
|
* Function irlmp_connect_indication (self)
|
|
*
|
|
* Incoming connection
|
|
*
|
|
*/
|
|
void irlmp_connect_indication(struct lsap_cb *self, struct sk_buff *skb)
|
|
{
|
|
int max_seg_size;
|
|
int lap_header_size;
|
|
int max_header_size;
|
|
|
|
IRDA_ASSERT(self != NULL, return;);
|
|
IRDA_ASSERT(self->magic == LMP_LSAP_MAGIC, return;);
|
|
IRDA_ASSERT(skb != NULL, return;);
|
|
IRDA_ASSERT(self->lap != NULL, return;);
|
|
|
|
IRDA_DEBUG(2, "%s(), slsap_sel=%02x, dlsap_sel=%02x\n",
|
|
__func__, self->slsap_sel, self->dlsap_sel);
|
|
|
|
/* Note : self->lap is set in irlmp_link_data_indication(),
|
|
* (case CONNECT_CMD:) because we have no way to set it here.
|
|
* Similarly, self->dlsap_sel is usually set in irlmp_find_lsap().
|
|
* Jean II */
|
|
|
|
self->qos = *self->lap->qos;
|
|
|
|
max_seg_size = self->lap->qos->data_size.value-LMP_HEADER;
|
|
lap_header_size = IRLAP_GET_HEADER_SIZE(self->lap->irlap);
|
|
max_header_size = LMP_HEADER + lap_header_size;
|
|
|
|
/* Hide LMP_CONTROL_HEADER header from layer above */
|
|
skb_pull(skb, LMP_CONTROL_HEADER);
|
|
|
|
if (self->notify.connect_indication) {
|
|
/* Don't forget to refcount it - see irlap_driver_rcv(). */
|
|
skb_get(skb);
|
|
self->notify.connect_indication(self->notify.instance, self,
|
|
&self->qos, max_seg_size,
|
|
max_header_size, skb);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Function irlmp_connect_response (handle, userdata)
|
|
*
|
|
* Service user is accepting connection
|
|
*
|
|
*/
|
|
int irlmp_connect_response(struct lsap_cb *self, struct sk_buff *userdata)
|
|
{
|
|
IRDA_ASSERT(self != NULL, return -1;);
|
|
IRDA_ASSERT(self->magic == LMP_LSAP_MAGIC, return -1;);
|
|
IRDA_ASSERT(userdata != NULL, return -1;);
|
|
|
|
/* We set the connected bit and move the lsap to the connected list
|
|
* in the state machine itself. Jean II */
|
|
|
|
IRDA_DEBUG(2, "%s(), slsap_sel=%02x, dlsap_sel=%02x\n",
|
|
__func__, self->slsap_sel, self->dlsap_sel);
|
|
|
|
/* Make room for MUX control header (3 bytes) */
|
|
IRDA_ASSERT(skb_headroom(userdata) >= LMP_CONTROL_HEADER, return -1;);
|
|
skb_push(userdata, LMP_CONTROL_HEADER);
|
|
|
|
irlmp_do_lsap_event(self, LM_CONNECT_RESPONSE, userdata);
|
|
|
|
/* Drop reference count - see irlap_data_request(). */
|
|
dev_kfree_skb(userdata);
|
|
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(irlmp_connect_response);
|
|
|
|
/*
|
|
* Function irlmp_connect_confirm (handle, skb)
|
|
*
|
|
* LSAP connection confirmed peer device!
|
|
*/
|
|
void irlmp_connect_confirm(struct lsap_cb *self, struct sk_buff *skb)
|
|
{
|
|
int max_header_size;
|
|
int lap_header_size;
|
|
int max_seg_size;
|
|
|
|
IRDA_DEBUG(3, "%s()\n", __func__);
|
|
|
|
IRDA_ASSERT(skb != NULL, return;);
|
|
IRDA_ASSERT(self != NULL, return;);
|
|
IRDA_ASSERT(self->magic == LMP_LSAP_MAGIC, return;);
|
|
IRDA_ASSERT(self->lap != NULL, return;);
|
|
|
|
self->qos = *self->lap->qos;
|
|
|
|
max_seg_size = self->lap->qos->data_size.value-LMP_HEADER;
|
|
lap_header_size = IRLAP_GET_HEADER_SIZE(self->lap->irlap);
|
|
max_header_size = LMP_HEADER + lap_header_size;
|
|
|
|
IRDA_DEBUG(2, "%s(), max_header_size=%d\n",
|
|
__func__, max_header_size);
|
|
|
|
/* Hide LMP_CONTROL_HEADER header from layer above */
|
|
skb_pull(skb, LMP_CONTROL_HEADER);
|
|
|
|
if (self->notify.connect_confirm) {
|
|
/* Don't forget to refcount it - see irlap_driver_rcv() */
|
|
skb_get(skb);
|
|
self->notify.connect_confirm(self->notify.instance, self,
|
|
&self->qos, max_seg_size,
|
|
max_header_size, skb);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Function irlmp_dup (orig, instance)
|
|
*
|
|
* Duplicate LSAP, can be used by servers to confirm a connection on a
|
|
* new LSAP so it can keep listening on the old one.
|
|
*
|
|
*/
|
|
struct lsap_cb *irlmp_dup(struct lsap_cb *orig, void *instance)
|
|
{
|
|
struct lsap_cb *new;
|
|
unsigned long flags;
|
|
|
|
IRDA_DEBUG(1, "%s()\n", __func__);
|
|
|
|
spin_lock_irqsave(&irlmp->unconnected_lsaps->hb_spinlock, flags);
|
|
|
|
/* Only allowed to duplicate unconnected LSAP's, and only LSAPs
|
|
* that have received a connect indication. Jean II */
|
|
if ((!hashbin_find(irlmp->unconnected_lsaps, (long) orig, NULL)) ||
|
|
(orig->lap == NULL)) {
|
|
IRDA_DEBUG(0, "%s(), invalid LSAP (wrong state)\n",
|
|
__func__);
|
|
spin_unlock_irqrestore(&irlmp->unconnected_lsaps->hb_spinlock,
|
|
flags);
|
|
return NULL;
|
|
}
|
|
|
|
/* Allocate a new instance */
|
|
new = kmemdup(orig, sizeof(*new), GFP_ATOMIC);
|
|
if (!new) {
|
|
IRDA_DEBUG(0, "%s(), unable to kmalloc\n", __func__);
|
|
spin_unlock_irqrestore(&irlmp->unconnected_lsaps->hb_spinlock,
|
|
flags);
|
|
return NULL;
|
|
}
|
|
/* new->lap = orig->lap; => done in the memcpy() */
|
|
/* new->slsap_sel = orig->slsap_sel; => done in the memcpy() */
|
|
new->conn_skb = NULL;
|
|
|
|
spin_unlock_irqrestore(&irlmp->unconnected_lsaps->hb_spinlock, flags);
|
|
|
|
/* Not everything is the same */
|
|
new->notify.instance = instance;
|
|
|
|
init_timer(&new->watchdog_timer);
|
|
|
|
hashbin_insert(irlmp->unconnected_lsaps, (irda_queue_t *) new,
|
|
(long) new, NULL);
|
|
|
|
#ifdef CONFIG_IRDA_CACHE_LAST_LSAP
|
|
/* Make sure that we invalidate the LSAP cache */
|
|
new->lap->cache.valid = FALSE;
|
|
#endif /* CONFIG_IRDA_CACHE_LAST_LSAP */
|
|
|
|
return new;
|
|
}
|
|
|
|
/*
|
|
* Function irlmp_disconnect_request (handle, userdata)
|
|
*
|
|
* The service user is requesting disconnection, this will not remove the
|
|
* LSAP, but only mark it as disconnected
|
|
*/
|
|
int irlmp_disconnect_request(struct lsap_cb *self, struct sk_buff *userdata)
|
|
{
|
|
struct lsap_cb *lsap;
|
|
|
|
IRDA_ASSERT(self != NULL, return -1;);
|
|
IRDA_ASSERT(self->magic == LMP_LSAP_MAGIC, return -1;);
|
|
IRDA_ASSERT(userdata != NULL, return -1;);
|
|
|
|
/* Already disconnected ?
|
|
* There is a race condition between irlmp_disconnect_indication()
|
|
* and us that might mess up the hashbins below. This fixes it.
|
|
* Jean II */
|
|
if (! test_and_clear_bit(0, &self->connected)) {
|
|
IRDA_DEBUG(0, "%s(), already disconnected!\n", __func__);
|
|
dev_kfree_skb(userdata);
|
|
return -1;
|
|
}
|
|
|
|
skb_push(userdata, LMP_CONTROL_HEADER);
|
|
|
|
/*
|
|
* Do the event before the other stuff since we must know
|
|
* which lap layer that the frame should be transmitted on
|
|
*/
|
|
irlmp_do_lsap_event(self, LM_DISCONNECT_REQUEST, userdata);
|
|
|
|
/* Drop reference count - see irlap_data_request(). */
|
|
dev_kfree_skb(userdata);
|
|
|
|
/*
|
|
* Remove LSAP from list of connected LSAPs for the particular link
|
|
* and insert it into the list of unconnected LSAPs
|
|
*/
|
|
IRDA_ASSERT(self->lap != NULL, return -1;);
|
|
IRDA_ASSERT(self->lap->magic == LMP_LAP_MAGIC, return -1;);
|
|
IRDA_ASSERT(self->lap->lsaps != NULL, return -1;);
|
|
|
|
lsap = hashbin_remove(self->lap->lsaps, (long) self, NULL);
|
|
#ifdef CONFIG_IRDA_CACHE_LAST_LSAP
|
|
self->lap->cache.valid = FALSE;
|
|
#endif
|
|
|
|
IRDA_ASSERT(lsap != NULL, return -1;);
|
|
IRDA_ASSERT(lsap->magic == LMP_LSAP_MAGIC, return -1;);
|
|
IRDA_ASSERT(lsap == self, return -1;);
|
|
|
|
hashbin_insert(irlmp->unconnected_lsaps, (irda_queue_t *) self,
|
|
(long) self, NULL);
|
|
|
|
/* Reset some values */
|
|
self->dlsap_sel = LSAP_ANY;
|
|
self->lap = NULL;
|
|
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(irlmp_disconnect_request);
|
|
|
|
/*
|
|
* Function irlmp_disconnect_indication (reason, userdata)
|
|
*
|
|
* LSAP is being closed!
|
|
*/
|
|
void irlmp_disconnect_indication(struct lsap_cb *self, LM_REASON reason,
|
|
struct sk_buff *skb)
|
|
{
|
|
struct lsap_cb *lsap;
|
|
|
|
IRDA_DEBUG(1, "%s(), reason=%s [%d]\n", __func__,
|
|
irlmp_reason_str(reason), reason);
|
|
IRDA_ASSERT(self != NULL, return;);
|
|
IRDA_ASSERT(self->magic == LMP_LSAP_MAGIC, return;);
|
|
|
|
IRDA_DEBUG(3, "%s(), slsap_sel=%02x, dlsap_sel=%02x\n",
|
|
__func__, self->slsap_sel, self->dlsap_sel);
|
|
|
|
/* Already disconnected ?
|
|
* There is a race condition between irlmp_disconnect_request()
|
|
* and us that might mess up the hashbins below. This fixes it.
|
|
* Jean II */
|
|
if (! test_and_clear_bit(0, &self->connected)) {
|
|
IRDA_DEBUG(0, "%s(), already disconnected!\n", __func__);
|
|
return;
|
|
}
|
|
|
|
/*
|
|
* Remove association between this LSAP and the link it used
|
|
*/
|
|
IRDA_ASSERT(self->lap != NULL, return;);
|
|
IRDA_ASSERT(self->lap->lsaps != NULL, return;);
|
|
|
|
lsap = hashbin_remove(self->lap->lsaps, (long) self, NULL);
|
|
#ifdef CONFIG_IRDA_CACHE_LAST_LSAP
|
|
self->lap->cache.valid = FALSE;
|
|
#endif
|
|
|
|
IRDA_ASSERT(lsap != NULL, return;);
|
|
IRDA_ASSERT(lsap == self, return;);
|
|
hashbin_insert(irlmp->unconnected_lsaps, (irda_queue_t *) lsap,
|
|
(long) lsap, NULL);
|
|
|
|
self->dlsap_sel = LSAP_ANY;
|
|
self->lap = NULL;
|
|
|
|
/*
|
|
* Inform service user
|
|
*/
|
|
if (self->notify.disconnect_indication) {
|
|
/* Don't forget to refcount it - see irlap_driver_rcv(). */
|
|
if(skb)
|
|
skb_get(skb);
|
|
self->notify.disconnect_indication(self->notify.instance,
|
|
self, reason, skb);
|
|
} else {
|
|
IRDA_DEBUG(0, "%s(), no handler\n", __func__);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Function irlmp_do_expiry (void)
|
|
*
|
|
* Do a cleanup of the discovery log (remove old entries)
|
|
*
|
|
* Note : separate from irlmp_do_discovery() so that we can handle
|
|
* passive discovery properly.
|
|
*/
|
|
void irlmp_do_expiry(void)
|
|
{
|
|
struct lap_cb *lap;
|
|
|
|
/*
|
|
* Expire discovery on all links which are *not* connected.
|
|
* On links which are connected, we can't do discovery
|
|
* anymore and can't refresh the log, so we freeze the
|
|
* discovery log to keep info about the device we are
|
|
* connected to.
|
|
* This info is mandatory if we want irlmp_connect_request()
|
|
* to work properly. - Jean II
|
|
*/
|
|
lap = (struct lap_cb *) hashbin_get_first(irlmp->links);
|
|
while (lap != NULL) {
|
|
IRDA_ASSERT(lap->magic == LMP_LAP_MAGIC, return;);
|
|
|
|
if (lap->lap_state == LAP_STANDBY) {
|
|
/* Expire discoveries discovered on this link */
|
|
irlmp_expire_discoveries(irlmp->cachelog, lap->saddr,
|
|
FALSE);
|
|
}
|
|
lap = (struct lap_cb *) hashbin_get_next(irlmp->links);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Function irlmp_do_discovery (nslots)
|
|
*
|
|
* Do some discovery on all links
|
|
*
|
|
* Note : log expiry is done above.
|
|
*/
|
|
void irlmp_do_discovery(int nslots)
|
|
{
|
|
struct lap_cb *lap;
|
|
__u16 *data_hintsp;
|
|
|
|
/* Make sure the value is sane */
|
|
if ((nslots != 1) && (nslots != 6) && (nslots != 8) && (nslots != 16)){
|
|
IRDA_WARNING("%s: invalid value for number of slots!\n",
|
|
__func__);
|
|
nslots = sysctl_discovery_slots = 8;
|
|
}
|
|
|
|
/* Construct new discovery info to be used by IrLAP, */
|
|
data_hintsp = (__u16 *) irlmp->discovery_cmd.data.hints;
|
|
put_unaligned(irlmp->hints.word, data_hintsp);
|
|
|
|
/*
|
|
* Set character set for device name (we use ASCII), and
|
|
* copy device name. Remember to make room for a \0 at the
|
|
* end
|
|
*/
|
|
irlmp->discovery_cmd.data.charset = CS_ASCII;
|
|
strncpy(irlmp->discovery_cmd.data.info, sysctl_devname,
|
|
NICKNAME_MAX_LEN);
|
|
irlmp->discovery_cmd.name_len = strlen(irlmp->discovery_cmd.data.info);
|
|
irlmp->discovery_cmd.nslots = nslots;
|
|
|
|
/*
|
|
* Try to send discovery packets on all links
|
|
*/
|
|
lap = (struct lap_cb *) hashbin_get_first(irlmp->links);
|
|
while (lap != NULL) {
|
|
IRDA_ASSERT(lap->magic == LMP_LAP_MAGIC, return;);
|
|
|
|
if (lap->lap_state == LAP_STANDBY) {
|
|
/* Try to discover */
|
|
irlmp_do_lap_event(lap, LM_LAP_DISCOVERY_REQUEST,
|
|
NULL);
|
|
}
|
|
lap = (struct lap_cb *) hashbin_get_next(irlmp->links);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Function irlmp_discovery_request (nslots)
|
|
*
|
|
* Do a discovery of devices in front of the computer
|
|
*
|
|
* If the caller has registered a client discovery callback, this
|
|
* allow him to receive the full content of the discovery log through
|
|
* this callback (as normally he will receive only new discoveries).
|
|
*/
|
|
void irlmp_discovery_request(int nslots)
|
|
{
|
|
/* Return current cached discovery log (in full) */
|
|
irlmp_discovery_confirm(irlmp->cachelog, DISCOVERY_LOG);
|
|
|
|
/*
|
|
* Start a single discovery operation if discovery is not already
|
|
* running
|
|
*/
|
|
if (!sysctl_discovery) {
|
|
/* Check if user wants to override the default */
|
|
if (nslots == DISCOVERY_DEFAULT_SLOTS)
|
|
nslots = sysctl_discovery_slots;
|
|
|
|
irlmp_do_discovery(nslots);
|
|
/* Note : we never do expiry here. Expiry will run on the
|
|
* discovery timer regardless of the state of sysctl_discovery
|
|
* Jean II */
|
|
}
|
|
}
|
|
EXPORT_SYMBOL(irlmp_discovery_request);
|
|
|
|
/*
|
|
* Function irlmp_get_discoveries (pn, mask, slots)
|
|
*
|
|
* Return the current discovery log
|
|
*
|
|
* If discovery is not enabled, you should call this function again
|
|
* after 1 or 2 seconds (i.e. after discovery has been done).
|
|
*/
|
|
struct irda_device_info *irlmp_get_discoveries(int *pn, __u16 mask, int nslots)
|
|
{
|
|
/* If discovery is not enabled, it's likely that the discovery log
|
|
* will be empty. So, we trigger a single discovery, so that next
|
|
* time the user call us there might be some results in the log.
|
|
* Jean II
|
|
*/
|
|
if (!sysctl_discovery) {
|
|
/* Check if user wants to override the default */
|
|
if (nslots == DISCOVERY_DEFAULT_SLOTS)
|
|
nslots = sysctl_discovery_slots;
|
|
|
|
/* Start discovery - will complete sometime later */
|
|
irlmp_do_discovery(nslots);
|
|
/* Note : we never do expiry here. Expiry will run on the
|
|
* discovery timer regardless of the state of sysctl_discovery
|
|
* Jean II */
|
|
}
|
|
|
|
/* Return current cached discovery log */
|
|
return irlmp_copy_discoveries(irlmp->cachelog, pn, mask, TRUE);
|
|
}
|
|
EXPORT_SYMBOL(irlmp_get_discoveries);
|
|
|
|
/*
|
|
* Function irlmp_notify_client (log)
|
|
*
|
|
* Notify all about discovered devices
|
|
*
|
|
* Clients registered with IrLMP are :
|
|
* o IrComm
|
|
* o IrLAN
|
|
* o Any socket (in any state - ouch, that may be a lot !)
|
|
* The client may have defined a callback to be notified in case of
|
|
* partial/selective discovery based on the hints that it passed to IrLMP.
|
|
*/
|
|
static inline void
|
|
irlmp_notify_client(irlmp_client_t *client,
|
|
hashbin_t *log, DISCOVERY_MODE mode)
|
|
{
|
|
discinfo_t *discoveries; /* Copy of the discovery log */
|
|
int number; /* Number of nodes in the log */
|
|
int i;
|
|
|
|
IRDA_DEBUG(3, "%s()\n", __func__);
|
|
|
|
/* Check if client wants or not partial/selective log (optimisation) */
|
|
if (!client->disco_callback)
|
|
return;
|
|
|
|
/*
|
|
* Locking notes :
|
|
* the old code was manipulating the log directly, which was
|
|
* very racy. Now, we use copy_discoveries, that protects
|
|
* itself while dumping the log for us.
|
|
* The overhead of the copy is compensated by the fact that
|
|
* we only pass new discoveries in normal mode and don't
|
|
* pass the same old entry every 3s to the caller as we used
|
|
* to do (virtual function calling is expensive).
|
|
* Jean II
|
|
*/
|
|
|
|
/*
|
|
* Now, check all discovered devices (if any), and notify client
|
|
* only about the services that the client is interested in
|
|
* We also notify only about the new devices unless the caller
|
|
* explicitly request a dump of the log. Jean II
|
|
*/
|
|
discoveries = irlmp_copy_discoveries(log, &number,
|
|
client->hint_mask.word,
|
|
(mode == DISCOVERY_LOG));
|
|
/* Check if the we got some results */
|
|
if (discoveries == NULL)
|
|
return; /* No nodes discovered */
|
|
|
|
/* Pass all entries to the listener */
|
|
for(i = 0; i < number; i++)
|
|
client->disco_callback(&(discoveries[i]), mode, client->priv);
|
|
|
|
/* Free up our buffer */
|
|
kfree(discoveries);
|
|
}
|
|
|
|
/*
|
|
* Function irlmp_discovery_confirm ( self, log)
|
|
*
|
|
* Some device(s) answered to our discovery request! Check to see which
|
|
* device it is, and give indication to the client(s)
|
|
*
|
|
*/
|
|
void irlmp_discovery_confirm(hashbin_t *log, DISCOVERY_MODE mode)
|
|
{
|
|
irlmp_client_t *client;
|
|
irlmp_client_t *client_next;
|
|
|
|
IRDA_DEBUG(3, "%s()\n", __func__);
|
|
|
|
IRDA_ASSERT(log != NULL, return;);
|
|
|
|
if (!(HASHBIN_GET_SIZE(log)))
|
|
return;
|
|
|
|
/* For each client - notify callback may touch client list */
|
|
client = (irlmp_client_t *) hashbin_get_first(irlmp->clients);
|
|
while (NULL != hashbin_find_next(irlmp->clients, (long) client, NULL,
|
|
(void *) &client_next) ) {
|
|
/* Check if we should notify client */
|
|
irlmp_notify_client(client, log, mode);
|
|
|
|
client = client_next;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Function irlmp_discovery_expiry (expiry)
|
|
*
|
|
* This device is no longer been discovered, and therefore it is being
|
|
* purged from the discovery log. Inform all clients who have
|
|
* registered for this event...
|
|
*
|
|
* Note : called exclusively from discovery.c
|
|
* Note : this is no longer called under discovery spinlock, so the
|
|
* client can do whatever he wants in the callback.
|
|
*/
|
|
void irlmp_discovery_expiry(discinfo_t *expiries, int number)
|
|
{
|
|
irlmp_client_t *client;
|
|
irlmp_client_t *client_next;
|
|
int i;
|
|
|
|
IRDA_DEBUG(3, "%s()\n", __func__);
|
|
|
|
IRDA_ASSERT(expiries != NULL, return;);
|
|
|
|
/* For each client - notify callback may touch client list */
|
|
client = (irlmp_client_t *) hashbin_get_first(irlmp->clients);
|
|
while (NULL != hashbin_find_next(irlmp->clients, (long) client, NULL,
|
|
(void *) &client_next) ) {
|
|
|
|
/* Pass all entries to the listener */
|
|
for(i = 0; i < number; i++) {
|
|
/* Check if we should notify client */
|
|
if ((client->expir_callback) &&
|
|
(client->hint_mask.word &
|
|
get_unaligned((__u16 *)expiries[i].hints)
|
|
& 0x7f7f) )
|
|
client->expir_callback(&(expiries[i]),
|
|
EXPIRY_TIMEOUT,
|
|
client->priv);
|
|
}
|
|
|
|
/* Next client */
|
|
client = client_next;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Function irlmp_get_discovery_response ()
|
|
*
|
|
* Used by IrLAP to get the discovery info it needs when answering
|
|
* discovery requests by other devices.
|
|
*/
|
|
discovery_t *irlmp_get_discovery_response(void)
|
|
{
|
|
IRDA_DEBUG(4, "%s()\n", __func__);
|
|
|
|
IRDA_ASSERT(irlmp != NULL, return NULL;);
|
|
|
|
put_unaligned(irlmp->hints.word, (__u16 *)irlmp->discovery_rsp.data.hints);
|
|
|
|
/*
|
|
* Set character set for device name (we use ASCII), and
|
|
* copy device name. Remember to make room for a \0 at the
|
|
* end
|
|
*/
|
|
irlmp->discovery_rsp.data.charset = CS_ASCII;
|
|
|
|
strncpy(irlmp->discovery_rsp.data.info, sysctl_devname,
|
|
NICKNAME_MAX_LEN);
|
|
irlmp->discovery_rsp.name_len = strlen(irlmp->discovery_rsp.data.info);
|
|
|
|
return &irlmp->discovery_rsp;
|
|
}
|
|
|
|
/*
|
|
* Function irlmp_data_request (self, skb)
|
|
*
|
|
* Send some data to peer device
|
|
*
|
|
* Note on skb management :
|
|
* After calling the lower layers of the IrDA stack, we always
|
|
* kfree() the skb, which drop the reference count (and potentially
|
|
* destroy it).
|
|
* IrLMP and IrLAP may queue the packet, and in those cases will need
|
|
* to use skb_get() to keep it around.
|
|
* Jean II
|
|
*/
|
|
int irlmp_data_request(struct lsap_cb *self, struct sk_buff *userdata)
|
|
{
|
|
int ret;
|
|
|
|
IRDA_ASSERT(self != NULL, return -1;);
|
|
IRDA_ASSERT(self->magic == LMP_LSAP_MAGIC, return -1;);
|
|
|
|
/* Make room for MUX header */
|
|
IRDA_ASSERT(skb_headroom(userdata) >= LMP_HEADER, return -1;);
|
|
skb_push(userdata, LMP_HEADER);
|
|
|
|
ret = irlmp_do_lsap_event(self, LM_DATA_REQUEST, userdata);
|
|
|
|
/* Drop reference count - see irlap_data_request(). */
|
|
dev_kfree_skb(userdata);
|
|
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL(irlmp_data_request);
|
|
|
|
/*
|
|
* Function irlmp_data_indication (handle, skb)
|
|
*
|
|
* Got data from LAP layer so pass it up to upper layer
|
|
*
|
|
*/
|
|
void irlmp_data_indication(struct lsap_cb *self, struct sk_buff *skb)
|
|
{
|
|
/* Hide LMP header from layer above */
|
|
skb_pull(skb, LMP_HEADER);
|
|
|
|
if (self->notify.data_indication) {
|
|
/* Don't forget to refcount it - see irlap_driver_rcv(). */
|
|
skb_get(skb);
|
|
self->notify.data_indication(self->notify.instance, self, skb);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Function irlmp_udata_request (self, skb)
|
|
*/
|
|
int irlmp_udata_request(struct lsap_cb *self, struct sk_buff *userdata)
|
|
{
|
|
int ret;
|
|
|
|
IRDA_DEBUG(4, "%s()\n", __func__);
|
|
|
|
IRDA_ASSERT(userdata != NULL, return -1;);
|
|
|
|
/* Make room for MUX header */
|
|
IRDA_ASSERT(skb_headroom(userdata) >= LMP_HEADER, return -1;);
|
|
skb_push(userdata, LMP_HEADER);
|
|
|
|
ret = irlmp_do_lsap_event(self, LM_UDATA_REQUEST, userdata);
|
|
|
|
/* Drop reference count - see irlap_data_request(). */
|
|
dev_kfree_skb(userdata);
|
|
|
|
return ret;
|
|
}
|
|
|
|
/*
|
|
* Function irlmp_udata_indication (self, skb)
|
|
*
|
|
* Send unreliable data (but still within the connection)
|
|
*
|
|
*/
|
|
void irlmp_udata_indication(struct lsap_cb *self, struct sk_buff *skb)
|
|
{
|
|
IRDA_DEBUG(4, "%s()\n", __func__);
|
|
|
|
IRDA_ASSERT(self != NULL, return;);
|
|
IRDA_ASSERT(self->magic == LMP_LSAP_MAGIC, return;);
|
|
IRDA_ASSERT(skb != NULL, return;);
|
|
|
|
/* Hide LMP header from layer above */
|
|
skb_pull(skb, LMP_HEADER);
|
|
|
|
if (self->notify.udata_indication) {
|
|
/* Don't forget to refcount it - see irlap_driver_rcv(). */
|
|
skb_get(skb);
|
|
self->notify.udata_indication(self->notify.instance, self,
|
|
skb);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Function irlmp_connless_data_request (self, skb)
|
|
*/
|
|
#ifdef CONFIG_IRDA_ULTRA
|
|
int irlmp_connless_data_request(struct lsap_cb *self, struct sk_buff *userdata,
|
|
__u8 pid)
|
|
{
|
|
struct sk_buff *clone_skb;
|
|
struct lap_cb *lap;
|
|
|
|
IRDA_DEBUG(4, "%s()\n", __func__);
|
|
|
|
IRDA_ASSERT(userdata != NULL, return -1;);
|
|
|
|
/* Make room for MUX and PID header */
|
|
IRDA_ASSERT(skb_headroom(userdata) >= LMP_HEADER+LMP_PID_HEADER,
|
|
return -1;);
|
|
|
|
/* Insert protocol identifier */
|
|
skb_push(userdata, LMP_PID_HEADER);
|
|
if(self != NULL)
|
|
userdata->data[0] = self->pid;
|
|
else
|
|
userdata->data[0] = pid;
|
|
|
|
/* Connectionless sockets must use 0x70 */
|
|
skb_push(userdata, LMP_HEADER);
|
|
userdata->data[0] = userdata->data[1] = LSAP_CONNLESS;
|
|
|
|
/* Try to send Connectionless packets out on all links */
|
|
lap = (struct lap_cb *) hashbin_get_first(irlmp->links);
|
|
while (lap != NULL) {
|
|
IRDA_ASSERT(lap->magic == LMP_LAP_MAGIC, return -1;);
|
|
|
|
clone_skb = skb_clone(userdata, GFP_ATOMIC);
|
|
if (!clone_skb) {
|
|
dev_kfree_skb(userdata);
|
|
return -ENOMEM;
|
|
}
|
|
|
|
irlap_unitdata_request(lap->irlap, clone_skb);
|
|
/* irlap_unitdata_request() don't increase refcount,
|
|
* so no dev_kfree_skb() - Jean II */
|
|
|
|
lap = (struct lap_cb *) hashbin_get_next(irlmp->links);
|
|
}
|
|
dev_kfree_skb(userdata);
|
|
|
|
return 0;
|
|
}
|
|
#endif /* CONFIG_IRDA_ULTRA */
|
|
|
|
/*
|
|
* Function irlmp_connless_data_indication (self, skb)
|
|
*
|
|
* Receive unreliable data outside any connection. Mostly used by Ultra
|
|
*
|
|
*/
|
|
#ifdef CONFIG_IRDA_ULTRA
|
|
void irlmp_connless_data_indication(struct lsap_cb *self, struct sk_buff *skb)
|
|
{
|
|
IRDA_DEBUG(4, "%s()\n", __func__);
|
|
|
|
IRDA_ASSERT(self != NULL, return;);
|
|
IRDA_ASSERT(self->magic == LMP_LSAP_MAGIC, return;);
|
|
IRDA_ASSERT(skb != NULL, return;);
|
|
|
|
/* Hide LMP and PID header from layer above */
|
|
skb_pull(skb, LMP_HEADER+LMP_PID_HEADER);
|
|
|
|
if (self->notify.udata_indication) {
|
|
/* Don't forget to refcount it - see irlap_driver_rcv(). */
|
|
skb_get(skb);
|
|
self->notify.udata_indication(self->notify.instance, self,
|
|
skb);
|
|
}
|
|
}
|
|
#endif /* CONFIG_IRDA_ULTRA */
|
|
|
|
/*
|
|
* Propagate status indication from LAP to LSAPs (via LMP)
|
|
* This don't trigger any change of state in lap_cb, lmp_cb or lsap_cb,
|
|
* and the event is stateless, therefore we can bypass both state machines
|
|
* and send the event direct to the LSAP user.
|
|
* Jean II
|
|
*/
|
|
void irlmp_status_indication(struct lap_cb *self,
|
|
LINK_STATUS link, LOCK_STATUS lock)
|
|
{
|
|
struct lsap_cb *next;
|
|
struct lsap_cb *curr;
|
|
|
|
/* Send status_indication to all LSAPs using this link */
|
|
curr = (struct lsap_cb *) hashbin_get_first( self->lsaps);
|
|
while (NULL != hashbin_find_next(self->lsaps, (long) curr, NULL,
|
|
(void *) &next) ) {
|
|
IRDA_ASSERT(curr->magic == LMP_LSAP_MAGIC, return;);
|
|
/*
|
|
* Inform service user if he has requested it
|
|
*/
|
|
if (curr->notify.status_indication != NULL)
|
|
curr->notify.status_indication(curr->notify.instance,
|
|
link, lock);
|
|
else
|
|
IRDA_DEBUG(2, "%s(), no handler\n", __func__);
|
|
|
|
curr = next;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Receive flow control indication from LAP.
|
|
* LAP want us to send it one more frame. We implement a simple round
|
|
* robin scheduler between the active sockets so that we get a bit of
|
|
* fairness. Note that the round robin is far from perfect, but it's
|
|
* better than nothing.
|
|
* We then poll the selected socket so that we can do synchronous
|
|
* refilling of IrLAP (which allow to minimise the number of buffers).
|
|
* Jean II
|
|
*/
|
|
void irlmp_flow_indication(struct lap_cb *self, LOCAL_FLOW flow)
|
|
{
|
|
struct lsap_cb *next;
|
|
struct lsap_cb *curr;
|
|
int lsap_todo;
|
|
|
|
IRDA_ASSERT(self->magic == LMP_LAP_MAGIC, return;);
|
|
IRDA_ASSERT(flow == FLOW_START, return;);
|
|
|
|
/* Get the number of lsap. That's the only safe way to know
|
|
* that we have looped around... - Jean II */
|
|
lsap_todo = HASHBIN_GET_SIZE(self->lsaps);
|
|
IRDA_DEBUG(4, "%s() : %d lsaps to scan\n", __func__, lsap_todo);
|
|
|
|
/* Poll lsap in order until the queue is full or until we
|
|
* tried them all.
|
|
* Most often, the current LSAP will have something to send,
|
|
* so we will go through this loop only once. - Jean II */
|
|
while((lsap_todo--) &&
|
|
(IRLAP_GET_TX_QUEUE_LEN(self->irlap) < LAP_HIGH_THRESHOLD)) {
|
|
/* Try to find the next lsap we should poll. */
|
|
next = self->flow_next;
|
|
/* If we have no lsap, restart from first one */
|
|
if(next == NULL)
|
|
next = (struct lsap_cb *) hashbin_get_first(self->lsaps);
|
|
/* Verify current one and find the next one */
|
|
curr = hashbin_find_next(self->lsaps, (long) next, NULL,
|
|
(void *) &self->flow_next);
|
|
/* Uh-oh... Paranoia */
|
|
if(curr == NULL)
|
|
break;
|
|
IRDA_DEBUG(4, "%s() : curr is %p, next was %p and is now %p, still %d to go - queue len = %d\n", __func__, curr, next, self->flow_next, lsap_todo, IRLAP_GET_TX_QUEUE_LEN(self->irlap));
|
|
|
|
/* Inform lsap user that it can send one more packet. */
|
|
if (curr->notify.flow_indication != NULL)
|
|
curr->notify.flow_indication(curr->notify.instance,
|
|
curr, flow);
|
|
else
|
|
IRDA_DEBUG(1, "%s(), no handler\n", __func__);
|
|
}
|
|
}
|
|
|
|
#if 0
|
|
/*
|
|
* Function irlmp_hint_to_service (hint)
|
|
*
|
|
* Returns a list of all servics contained in the given hint bits. This
|
|
* function assumes that the hint bits have the size of two bytes only
|
|
*/
|
|
__u8 *irlmp_hint_to_service(__u8 *hint)
|
|
{
|
|
__u8 *service;
|
|
int i = 0;
|
|
|
|
/*
|
|
* Allocate array to store services in. 16 entries should be safe
|
|
* since we currently only support 2 hint bytes
|
|
*/
|
|
service = kmalloc(16, GFP_ATOMIC);
|
|
if (!service) {
|
|
IRDA_DEBUG(1, "%s(), Unable to kmalloc!\n", __func__);
|
|
return NULL;
|
|
}
|
|
|
|
if (!hint[0]) {
|
|
IRDA_DEBUG(1, "<None>\n");
|
|
kfree(service);
|
|
return NULL;
|
|
}
|
|
if (hint[0] & HINT_PNP)
|
|
IRDA_DEBUG(1, "PnP Compatible ");
|
|
if (hint[0] & HINT_PDA)
|
|
IRDA_DEBUG(1, "PDA/Palmtop ");
|
|
if (hint[0] & HINT_COMPUTER)
|
|
IRDA_DEBUG(1, "Computer ");
|
|
if (hint[0] & HINT_PRINTER) {
|
|
IRDA_DEBUG(1, "Printer ");
|
|
service[i++] = S_PRINTER;
|
|
}
|
|
if (hint[0] & HINT_MODEM)
|
|
IRDA_DEBUG(1, "Modem ");
|
|
if (hint[0] & HINT_FAX)
|
|
IRDA_DEBUG(1, "Fax ");
|
|
if (hint[0] & HINT_LAN) {
|
|
IRDA_DEBUG(1, "LAN Access ");
|
|
service[i++] = S_LAN;
|
|
}
|
|
/*
|
|
* Test if extension byte exists. This byte will usually be
|
|
* there, but this is not really required by the standard.
|
|
* (IrLMP p. 29)
|
|
*/
|
|
if (hint[0] & HINT_EXTENSION) {
|
|
if (hint[1] & HINT_TELEPHONY) {
|
|
IRDA_DEBUG(1, "Telephony ");
|
|
service[i++] = S_TELEPHONY;
|
|
} if (hint[1] & HINT_FILE_SERVER)
|
|
IRDA_DEBUG(1, "File Server ");
|
|
|
|
if (hint[1] & HINT_COMM) {
|
|
IRDA_DEBUG(1, "IrCOMM ");
|
|
service[i++] = S_COMM;
|
|
}
|
|
if (hint[1] & HINT_OBEX) {
|
|
IRDA_DEBUG(1, "IrOBEX ");
|
|
service[i++] = S_OBEX;
|
|
}
|
|
}
|
|
IRDA_DEBUG(1, "\n");
|
|
|
|
/* So that client can be notified about any discovery */
|
|
service[i++] = S_ANY;
|
|
|
|
service[i] = S_END;
|
|
|
|
return service;
|
|
}
|
|
#endif
|
|
|
|
static const __u16 service_hint_mapping[S_END][2] = {
|
|
{ HINT_PNP, 0 }, /* S_PNP */
|
|
{ HINT_PDA, 0 }, /* S_PDA */
|
|
{ HINT_COMPUTER, 0 }, /* S_COMPUTER */
|
|
{ HINT_PRINTER, 0 }, /* S_PRINTER */
|
|
{ HINT_MODEM, 0 }, /* S_MODEM */
|
|
{ HINT_FAX, 0 }, /* S_FAX */
|
|
{ HINT_LAN, 0 }, /* S_LAN */
|
|
{ HINT_EXTENSION, HINT_TELEPHONY }, /* S_TELEPHONY */
|
|
{ HINT_EXTENSION, HINT_COMM }, /* S_COMM */
|
|
{ HINT_EXTENSION, HINT_OBEX }, /* S_OBEX */
|
|
{ 0xFF, 0xFF }, /* S_ANY */
|
|
};
|
|
|
|
/*
|
|
* Function irlmp_service_to_hint (service)
|
|
*
|
|
* Converts a service type, to a hint bit
|
|
*
|
|
* Returns: a 16 bit hint value, with the service bit set
|
|
*/
|
|
__u16 irlmp_service_to_hint(int service)
|
|
{
|
|
__u16_host_order hint;
|
|
|
|
hint.byte[0] = service_hint_mapping[service][0];
|
|
hint.byte[1] = service_hint_mapping[service][1];
|
|
|
|
return hint.word;
|
|
}
|
|
EXPORT_SYMBOL(irlmp_service_to_hint);
|
|
|
|
/*
|
|
* Function irlmp_register_service (service)
|
|
*
|
|
* Register local service with IrLMP
|
|
*
|
|
*/
|
|
void *irlmp_register_service(__u16 hints)
|
|
{
|
|
irlmp_service_t *service;
|
|
|
|
IRDA_DEBUG(4, "%s(), hints = %04x\n", __func__, hints);
|
|
|
|
/* Make a new registration */
|
|
service = kmalloc(sizeof(irlmp_service_t), GFP_ATOMIC);
|
|
if (!service) {
|
|
IRDA_DEBUG(1, "%s(), Unable to kmalloc!\n", __func__);
|
|
return NULL;
|
|
}
|
|
service->hints.word = hints;
|
|
hashbin_insert(irlmp->services, (irda_queue_t *) service,
|
|
(long) service, NULL);
|
|
|
|
irlmp->hints.word |= hints;
|
|
|
|
return (void *)service;
|
|
}
|
|
EXPORT_SYMBOL(irlmp_register_service);
|
|
|
|
/*
|
|
* Function irlmp_unregister_service (handle)
|
|
*
|
|
* Unregister service with IrLMP.
|
|
*
|
|
* Returns: 0 on success, -1 on error
|
|
*/
|
|
int irlmp_unregister_service(void *handle)
|
|
{
|
|
irlmp_service_t *service;
|
|
unsigned long flags;
|
|
|
|
IRDA_DEBUG(4, "%s()\n", __func__);
|
|
|
|
if (!handle)
|
|
return -1;
|
|
|
|
/* Caller may call with invalid handle (it's legal) - Jean II */
|
|
service = hashbin_lock_find(irlmp->services, (long) handle, NULL);
|
|
if (!service) {
|
|
IRDA_DEBUG(1, "%s(), Unknown service!\n", __func__);
|
|
return -1;
|
|
}
|
|
|
|
hashbin_remove_this(irlmp->services, (irda_queue_t *) service);
|
|
kfree(service);
|
|
|
|
/* Remove old hint bits */
|
|
irlmp->hints.word = 0;
|
|
|
|
/* Refresh current hint bits */
|
|
spin_lock_irqsave(&irlmp->services->hb_spinlock, flags);
|
|
service = (irlmp_service_t *) hashbin_get_first(irlmp->services);
|
|
while (service) {
|
|
irlmp->hints.word |= service->hints.word;
|
|
|
|
service = (irlmp_service_t *)hashbin_get_next(irlmp->services);
|
|
}
|
|
spin_unlock_irqrestore(&irlmp->services->hb_spinlock, flags);
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(irlmp_unregister_service);
|
|
|
|
/*
|
|
* Function irlmp_register_client (hint_mask, callback1, callback2)
|
|
*
|
|
* Register a local client with IrLMP
|
|
* First callback is selective discovery (based on hints)
|
|
* Second callback is for selective discovery expiries
|
|
*
|
|
* Returns: handle > 0 on success, 0 on error
|
|
*/
|
|
void *irlmp_register_client(__u16 hint_mask, DISCOVERY_CALLBACK1 disco_clb,
|
|
DISCOVERY_CALLBACK2 expir_clb, void *priv)
|
|
{
|
|
irlmp_client_t *client;
|
|
|
|
IRDA_DEBUG(1, "%s()\n", __func__);
|
|
IRDA_ASSERT(irlmp != NULL, return NULL;);
|
|
|
|
/* Make a new registration */
|
|
client = kmalloc(sizeof(irlmp_client_t), GFP_ATOMIC);
|
|
if (!client) {
|
|
IRDA_DEBUG( 1, "%s(), Unable to kmalloc!\n", __func__);
|
|
return NULL;
|
|
}
|
|
|
|
/* Register the details */
|
|
client->hint_mask.word = hint_mask;
|
|
client->disco_callback = disco_clb;
|
|
client->expir_callback = expir_clb;
|
|
client->priv = priv;
|
|
|
|
hashbin_insert(irlmp->clients, (irda_queue_t *) client,
|
|
(long) client, NULL);
|
|
|
|
return (void *) client;
|
|
}
|
|
EXPORT_SYMBOL(irlmp_register_client);
|
|
|
|
/*
|
|
* Function irlmp_update_client (handle, hint_mask, callback1, callback2)
|
|
*
|
|
* Updates specified client (handle) with possibly new hint_mask and
|
|
* callback
|
|
*
|
|
* Returns: 0 on success, -1 on error
|
|
*/
|
|
int irlmp_update_client(void *handle, __u16 hint_mask,
|
|
DISCOVERY_CALLBACK1 disco_clb,
|
|
DISCOVERY_CALLBACK2 expir_clb, void *priv)
|
|
{
|
|
irlmp_client_t *client;
|
|
|
|
if (!handle)
|
|
return -1;
|
|
|
|
client = hashbin_lock_find(irlmp->clients, (long) handle, NULL);
|
|
if (!client) {
|
|
IRDA_DEBUG(1, "%s(), Unknown client!\n", __func__);
|
|
return -1;
|
|
}
|
|
|
|
client->hint_mask.word = hint_mask;
|
|
client->disco_callback = disco_clb;
|
|
client->expir_callback = expir_clb;
|
|
client->priv = priv;
|
|
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(irlmp_update_client);
|
|
|
|
/*
|
|
* Function irlmp_unregister_client (handle)
|
|
*
|
|
* Returns: 0 on success, -1 on error
|
|
*
|
|
*/
|
|
int irlmp_unregister_client(void *handle)
|
|
{
|
|
struct irlmp_client *client;
|
|
|
|
IRDA_DEBUG(4, "%s()\n", __func__);
|
|
|
|
if (!handle)
|
|
return -1;
|
|
|
|
/* Caller may call with invalid handle (it's legal) - Jean II */
|
|
client = hashbin_lock_find(irlmp->clients, (long) handle, NULL);
|
|
if (!client) {
|
|
IRDA_DEBUG(1, "%s(), Unknown client!\n", __func__);
|
|
return -1;
|
|
}
|
|
|
|
IRDA_DEBUG(4, "%s(), removing client!\n", __func__);
|
|
hashbin_remove_this(irlmp->clients, (irda_queue_t *) client);
|
|
kfree(client);
|
|
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(irlmp_unregister_client);
|
|
|
|
/*
|
|
* Function irlmp_slsap_inuse (slsap)
|
|
*
|
|
* Check if the given source LSAP selector is in use
|
|
*
|
|
* This function is clearly not very efficient. On the mitigating side, the
|
|
* stack make sure that in 99% of the cases, we are called only once
|
|
* for each socket allocation. We could probably keep a bitmap
|
|
* of the allocated LSAP, but I'm not sure the complexity is worth it.
|
|
* Jean II
|
|
*/
|
|
static int irlmp_slsap_inuse(__u8 slsap_sel)
|
|
{
|
|
struct lsap_cb *self;
|
|
struct lap_cb *lap;
|
|
unsigned long flags;
|
|
|
|
IRDA_ASSERT(irlmp != NULL, return TRUE;);
|
|
IRDA_ASSERT(irlmp->magic == LMP_MAGIC, return TRUE;);
|
|
IRDA_ASSERT(slsap_sel != LSAP_ANY, return TRUE;);
|
|
|
|
IRDA_DEBUG(4, "%s()\n", __func__);
|
|
|
|
#ifdef CONFIG_IRDA_ULTRA
|
|
/* Accept all bindings to the connectionless LSAP */
|
|
if (slsap_sel == LSAP_CONNLESS)
|
|
return FALSE;
|
|
#endif /* CONFIG_IRDA_ULTRA */
|
|
|
|
/* Valid values are between 0 and 127 (0x0-0x6F) */
|
|
if (slsap_sel > LSAP_MAX)
|
|
return TRUE;
|
|
|
|
/*
|
|
* Check if slsap is already in use. To do this we have to loop over
|
|
* every IrLAP connection and check every LSAP associated with each
|
|
* the connection.
|
|
*/
|
|
spin_lock_irqsave_nested(&irlmp->links->hb_spinlock, flags,
|
|
SINGLE_DEPTH_NESTING);
|
|
lap = (struct lap_cb *) hashbin_get_first(irlmp->links);
|
|
while (lap != NULL) {
|
|
IRDA_ASSERT(lap->magic == LMP_LAP_MAGIC, goto errlap;);
|
|
|
|
/* Careful for priority inversions here !
|
|
* irlmp->links is never taken while another IrDA
|
|
* spinlock is held, so we are safe. Jean II */
|
|
spin_lock(&lap->lsaps->hb_spinlock);
|
|
|
|
/* For this IrLAP, check all the LSAPs */
|
|
self = (struct lsap_cb *) hashbin_get_first(lap->lsaps);
|
|
while (self != NULL) {
|
|
IRDA_ASSERT(self->magic == LMP_LSAP_MAGIC,
|
|
goto errlsap;);
|
|
|
|
if ((self->slsap_sel == slsap_sel)) {
|
|
IRDA_DEBUG(4, "Source LSAP selector=%02x in use\n",
|
|
self->slsap_sel);
|
|
goto errlsap;
|
|
}
|
|
self = (struct lsap_cb*) hashbin_get_next(lap->lsaps);
|
|
}
|
|
spin_unlock(&lap->lsaps->hb_spinlock);
|
|
|
|
/* Next LAP */
|
|
lap = (struct lap_cb *) hashbin_get_next(irlmp->links);
|
|
}
|
|
spin_unlock_irqrestore(&irlmp->links->hb_spinlock, flags);
|
|
|
|
/*
|
|
* Server sockets are typically waiting for connections and
|
|
* therefore reside in the unconnected list. We don't want
|
|
* to give out their LSAPs for obvious reasons...
|
|
* Jean II
|
|
*/
|
|
spin_lock_irqsave(&irlmp->unconnected_lsaps->hb_spinlock, flags);
|
|
|
|
self = (struct lsap_cb *) hashbin_get_first(irlmp->unconnected_lsaps);
|
|
while (self != NULL) {
|
|
IRDA_ASSERT(self->magic == LMP_LSAP_MAGIC, goto erruncon;);
|
|
if ((self->slsap_sel == slsap_sel)) {
|
|
IRDA_DEBUG(4, "Source LSAP selector=%02x in use (unconnected)\n",
|
|
self->slsap_sel);
|
|
goto erruncon;
|
|
}
|
|
self = (struct lsap_cb*) hashbin_get_next(irlmp->unconnected_lsaps);
|
|
}
|
|
spin_unlock_irqrestore(&irlmp->unconnected_lsaps->hb_spinlock, flags);
|
|
|
|
return FALSE;
|
|
|
|
/* Error exit from within one of the two nested loops.
|
|
* Make sure we release the right spinlock in the righ order.
|
|
* Jean II */
|
|
errlsap:
|
|
spin_unlock(&lap->lsaps->hb_spinlock);
|
|
IRDA_ASSERT_LABEL(errlap:)
|
|
spin_unlock_irqrestore(&irlmp->links->hb_spinlock, flags);
|
|
return TRUE;
|
|
|
|
/* Error exit from within the unconnected loop.
|
|
* Just one spinlock to release... Jean II */
|
|
erruncon:
|
|
spin_unlock_irqrestore(&irlmp->unconnected_lsaps->hb_spinlock, flags);
|
|
return TRUE;
|
|
}
|
|
|
|
/*
|
|
* Function irlmp_find_free_slsap ()
|
|
*
|
|
* Find a free source LSAP to use. This function is called if the service
|
|
* user has requested a source LSAP equal to LM_ANY
|
|
*/
|
|
static __u8 irlmp_find_free_slsap(void)
|
|
{
|
|
__u8 lsap_sel;
|
|
int wrapped = 0;
|
|
|
|
IRDA_ASSERT(irlmp != NULL, return -1;);
|
|
IRDA_ASSERT(irlmp->magic == LMP_MAGIC, return -1;);
|
|
|
|
/* Most users don't really care which LSAPs they are given,
|
|
* and therefore we automatically give them a free LSAP.
|
|
* This function try to find a suitable LSAP, i.e. which is
|
|
* not in use and is within the acceptable range. Jean II */
|
|
|
|
do {
|
|
/* Always increment to LSAP number before using it.
|
|
* In theory, we could reuse the last LSAP number, as long
|
|
* as it is no longer in use. Some IrDA stack do that.
|
|
* However, the previous socket may be half closed, i.e.
|
|
* we closed it, we think it's no longer in use, but the
|
|
* other side did not receive our close and think it's
|
|
* active and still send data on it.
|
|
* This is similar to what is done with PIDs and TCP ports.
|
|
* Also, this reduce the number of calls to irlmp_slsap_inuse()
|
|
* which is an expensive function to call.
|
|
* Jean II */
|
|
irlmp->last_lsap_sel++;
|
|
|
|
/* Check if we need to wraparound (0x70-0x7f are reserved) */
|
|
if (irlmp->last_lsap_sel > LSAP_MAX) {
|
|
/* 0x00-0x10 are also reserved for well know ports */
|
|
irlmp->last_lsap_sel = 0x10;
|
|
|
|
/* Make sure we terminate the loop */
|
|
if (wrapped++) {
|
|
IRDA_ERROR("%s: no more free LSAPs !\n",
|
|
__func__);
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
/* If the LSAP is in use, try the next one.
|
|
* Despite the autoincrement, we need to check if the lsap
|
|
* is really in use or not, first because LSAP may be
|
|
* directly allocated in irlmp_open_lsap(), and also because
|
|
* we may wraparound on old sockets. Jean II */
|
|
} while (irlmp_slsap_inuse(irlmp->last_lsap_sel));
|
|
|
|
/* Got it ! */
|
|
lsap_sel = irlmp->last_lsap_sel;
|
|
IRDA_DEBUG(4, "%s(), found free lsap_sel=%02x\n",
|
|
__func__, lsap_sel);
|
|
|
|
return lsap_sel;
|
|
}
|
|
|
|
/*
|
|
* Function irlmp_convert_lap_reason (lap_reason)
|
|
*
|
|
* Converts IrLAP disconnect reason codes to IrLMP disconnect reason
|
|
* codes
|
|
*
|
|
*/
|
|
LM_REASON irlmp_convert_lap_reason( LAP_REASON lap_reason)
|
|
{
|
|
int reason = LM_LAP_DISCONNECT;
|
|
|
|
switch (lap_reason) {
|
|
case LAP_DISC_INDICATION: /* Received a disconnect request from peer */
|
|
IRDA_DEBUG( 1, "%s(), LAP_DISC_INDICATION\n", __func__);
|
|
reason = LM_USER_REQUEST;
|
|
break;
|
|
case LAP_NO_RESPONSE: /* To many retransmits without response */
|
|
IRDA_DEBUG( 1, "%s(), LAP_NO_RESPONSE\n", __func__);
|
|
reason = LM_LAP_DISCONNECT;
|
|
break;
|
|
case LAP_RESET_INDICATION:
|
|
IRDA_DEBUG( 1, "%s(), LAP_RESET_INDICATION\n", __func__);
|
|
reason = LM_LAP_RESET;
|
|
break;
|
|
case LAP_FOUND_NONE:
|
|
case LAP_MEDIA_BUSY:
|
|
case LAP_PRIMARY_CONFLICT:
|
|
IRDA_DEBUG(1, "%s(), LAP_FOUND_NONE, LAP_MEDIA_BUSY or LAP_PRIMARY_CONFLICT\n", __func__);
|
|
reason = LM_CONNECT_FAILURE;
|
|
break;
|
|
default:
|
|
IRDA_DEBUG(1, "%s(), Unknown IrLAP disconnect reason %d!\n",
|
|
__func__, lap_reason);
|
|
reason = LM_LAP_DISCONNECT;
|
|
break;
|
|
}
|
|
|
|
return reason;
|
|
}
|
|
|
|
#ifdef CONFIG_PROC_FS
|
|
|
|
struct irlmp_iter_state {
|
|
hashbin_t *hashbin;
|
|
};
|
|
|
|
#define LSAP_START_TOKEN ((void *)1)
|
|
#define LINK_START_TOKEN ((void *)2)
|
|
|
|
static void *irlmp_seq_hb_idx(struct irlmp_iter_state *iter, loff_t *off)
|
|
{
|
|
void *element;
|
|
|
|
spin_lock_irq(&iter->hashbin->hb_spinlock);
|
|
for (element = hashbin_get_first(iter->hashbin);
|
|
element != NULL;
|
|
element = hashbin_get_next(iter->hashbin)) {
|
|
if (!off || *off-- == 0) {
|
|
/* NB: hashbin left locked */
|
|
return element;
|
|
}
|
|
}
|
|
spin_unlock_irq(&iter->hashbin->hb_spinlock);
|
|
iter->hashbin = NULL;
|
|
return NULL;
|
|
}
|
|
|
|
|
|
static void *irlmp_seq_start(struct seq_file *seq, loff_t *pos)
|
|
{
|
|
struct irlmp_iter_state *iter = seq->private;
|
|
void *v;
|
|
loff_t off = *pos;
|
|
|
|
iter->hashbin = NULL;
|
|
if (off-- == 0)
|
|
return LSAP_START_TOKEN;
|
|
|
|
iter->hashbin = irlmp->unconnected_lsaps;
|
|
v = irlmp_seq_hb_idx(iter, &off);
|
|
if (v)
|
|
return v;
|
|
|
|
if (off-- == 0)
|
|
return LINK_START_TOKEN;
|
|
|
|
iter->hashbin = irlmp->links;
|
|
return irlmp_seq_hb_idx(iter, &off);
|
|
}
|
|
|
|
static void *irlmp_seq_next(struct seq_file *seq, void *v, loff_t *pos)
|
|
{
|
|
struct irlmp_iter_state *iter = seq->private;
|
|
|
|
++*pos;
|
|
|
|
if (v == LSAP_START_TOKEN) { /* start of list of lsaps */
|
|
iter->hashbin = irlmp->unconnected_lsaps;
|
|
v = irlmp_seq_hb_idx(iter, NULL);
|
|
return v ? v : LINK_START_TOKEN;
|
|
}
|
|
|
|
if (v == LINK_START_TOKEN) { /* start of list of links */
|
|
iter->hashbin = irlmp->links;
|
|
return irlmp_seq_hb_idx(iter, NULL);
|
|
}
|
|
|
|
v = hashbin_get_next(iter->hashbin);
|
|
|
|
if (v == NULL) { /* no more in this hash bin */
|
|
spin_unlock_irq(&iter->hashbin->hb_spinlock);
|
|
|
|
if (iter->hashbin == irlmp->unconnected_lsaps)
|
|
v = LINK_START_TOKEN;
|
|
|
|
iter->hashbin = NULL;
|
|
}
|
|
return v;
|
|
}
|
|
|
|
static void irlmp_seq_stop(struct seq_file *seq, void *v)
|
|
{
|
|
struct irlmp_iter_state *iter = seq->private;
|
|
|
|
if (iter->hashbin)
|
|
spin_unlock_irq(&iter->hashbin->hb_spinlock);
|
|
}
|
|
|
|
static int irlmp_seq_show(struct seq_file *seq, void *v)
|
|
{
|
|
const struct irlmp_iter_state *iter = seq->private;
|
|
struct lsap_cb *self = v;
|
|
|
|
if (v == LSAP_START_TOKEN)
|
|
seq_puts(seq, "Unconnected LSAPs:\n");
|
|
else if (v == LINK_START_TOKEN)
|
|
seq_puts(seq, "\nRegistered Link Layers:\n");
|
|
else if (iter->hashbin == irlmp->unconnected_lsaps) {
|
|
self = v;
|
|
IRDA_ASSERT(self->magic == LMP_LSAP_MAGIC, return -EINVAL; );
|
|
seq_printf(seq, "lsap state: %s, ",
|
|
irlsap_state[ self->lsap_state]);
|
|
seq_printf(seq,
|
|
"slsap_sel: %#02x, dlsap_sel: %#02x, ",
|
|
self->slsap_sel, self->dlsap_sel);
|
|
seq_printf(seq, "(%s)", self->notify.name);
|
|
seq_printf(seq, "\n");
|
|
} else if (iter->hashbin == irlmp->links) {
|
|
struct lap_cb *lap = v;
|
|
|
|
seq_printf(seq, "lap state: %s, ",
|
|
irlmp_state[lap->lap_state]);
|
|
|
|
seq_printf(seq, "saddr: %#08x, daddr: %#08x, ",
|
|
lap->saddr, lap->daddr);
|
|
seq_printf(seq, "num lsaps: %d",
|
|
HASHBIN_GET_SIZE(lap->lsaps));
|
|
seq_printf(seq, "\n");
|
|
|
|
/* Careful for priority inversions here !
|
|
* All other uses of attrib spinlock are independent of
|
|
* the object spinlock, so we are safe. Jean II */
|
|
spin_lock(&lap->lsaps->hb_spinlock);
|
|
|
|
seq_printf(seq, "\n Connected LSAPs:\n");
|
|
for (self = (struct lsap_cb *) hashbin_get_first(lap->lsaps);
|
|
self != NULL;
|
|
self = (struct lsap_cb *)hashbin_get_next(lap->lsaps)) {
|
|
IRDA_ASSERT(self->magic == LMP_LSAP_MAGIC,
|
|
goto outloop;);
|
|
seq_printf(seq, " lsap state: %s, ",
|
|
irlsap_state[ self->lsap_state]);
|
|
seq_printf(seq,
|
|
"slsap_sel: %#02x, dlsap_sel: %#02x, ",
|
|
self->slsap_sel, self->dlsap_sel);
|
|
seq_printf(seq, "(%s)", self->notify.name);
|
|
seq_putc(seq, '\n');
|
|
|
|
}
|
|
IRDA_ASSERT_LABEL(outloop:)
|
|
spin_unlock(&lap->lsaps->hb_spinlock);
|
|
seq_putc(seq, '\n');
|
|
} else
|
|
return -EINVAL;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct seq_operations irlmp_seq_ops = {
|
|
.start = irlmp_seq_start,
|
|
.next = irlmp_seq_next,
|
|
.stop = irlmp_seq_stop,
|
|
.show = irlmp_seq_show,
|
|
};
|
|
|
|
static int irlmp_seq_open(struct inode *inode, struct file *file)
|
|
{
|
|
IRDA_ASSERT(irlmp != NULL, return -EINVAL;);
|
|
|
|
return seq_open_private(file, &irlmp_seq_ops,
|
|
sizeof(struct irlmp_iter_state));
|
|
}
|
|
|
|
const struct file_operations irlmp_seq_fops = {
|
|
.owner = THIS_MODULE,
|
|
.open = irlmp_seq_open,
|
|
.read = seq_read,
|
|
.llseek = seq_lseek,
|
|
.release = seq_release_private,
|
|
};
|
|
|
|
#endif /* PROC_FS */
|