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linux/net/irda/iriap.c
David S. Miller 79b3891587 irda: iriap: Use seperate lockdep class for irias_objects->hb_spinlock 
The SEQ output functions grab the obj->attrib->hb_spinlock lock of
sub-objects found in the hash traversal.  These locks are in a different
realm than the one used for the irias_objects hash table itself.

So put the latter into it's own lockdep class.

Reported-by: Dave Jones <davej@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2011-06-06 17:00:35 -07:00

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/*********************************************************************
*
* Filename: iriap.c
* Version: 0.8
* Description: Information Access Protocol (IAP)
* Status: Experimental.
* Author: Dag Brattli <dagb@cs.uit.no>
* Created at: Thu Aug 21 00:02:07 1997
* Modified at: Sat Dec 25 16:42:42 1999
* Modified by: Dag Brattli <dagb@cs.uit.no>
*
* Copyright (c) 1998-1999 Dag Brattli <dagb@cs.uit.no>,
* All Rights Reserved.
* Copyright (c) 2000-2003 Jean Tourrilhes <jt@hpl.hp.com>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of
* the License, or (at your option) any later version.
*
* Neither Dag Brattli nor University of Tromsø admit liability nor
* provide warranty for any of this software. This material is
* provided "AS-IS" and at no charge.
*
********************************************************************/
#include <linux/module.h>
#include <linux/types.h>
#include <linux/skbuff.h>
#include <linux/fs.h>
#include <linux/string.h>
#include <linux/init.h>
#include <linux/seq_file.h>
#include <linux/slab.h>
#include <asm/byteorder.h>
#include <asm/unaligned.h>
#include <net/irda/irda.h>
#include <net/irda/irttp.h>
#include <net/irda/irlmp.h>
#include <net/irda/irias_object.h>
#include <net/irda/iriap_event.h>
#include <net/irda/iriap.h>
#ifdef CONFIG_IRDA_DEBUG
/* FIXME: This one should go in irlmp.c */
static const char *const ias_charset_types[] = {
"CS_ASCII",
"CS_ISO_8859_1",
"CS_ISO_8859_2",
"CS_ISO_8859_3",
"CS_ISO_8859_4",
"CS_ISO_8859_5",
"CS_ISO_8859_6",
"CS_ISO_8859_7",
"CS_ISO_8859_8",
"CS_ISO_8859_9",
"CS_UNICODE"
};
#endif /* CONFIG_IRDA_DEBUG */
static hashbin_t *iriap = NULL;
static void *service_handle;
static void __iriap_close(struct iriap_cb *self);
static int iriap_register_lsap(struct iriap_cb *self, __u8 slsap_sel, int mode);
static void iriap_disconnect_indication(void *instance, void *sap,
LM_REASON reason, struct sk_buff *skb);
static void iriap_connect_indication(void *instance, void *sap,
struct qos_info *qos, __u32 max_sdu_size,
__u8 max_header_size,
struct sk_buff *skb);
static void iriap_connect_confirm(void *instance, void *sap,
struct qos_info *qos,
__u32 max_sdu_size, __u8 max_header_size,
struct sk_buff *skb);
static int iriap_data_indication(void *instance, void *sap,
struct sk_buff *skb);
static void iriap_watchdog_timer_expired(void *data);
static inline void iriap_start_watchdog_timer(struct iriap_cb *self,
int timeout)
{
irda_start_timer(&self->watchdog_timer, timeout, self,
iriap_watchdog_timer_expired);
}
static struct lock_class_key irias_objects_key;
/*
* Function iriap_init (void)
*
* Initializes the IrIAP layer, called by the module initialization code
* in irmod.c
*/
int __init iriap_init(void)
{
struct ias_object *obj;
struct iriap_cb *server;
__u8 oct_seq[6];
__u16 hints;
/* Allocate master array */
iriap = hashbin_new(HB_LOCK);
if (!iriap)
return -ENOMEM;
/* Object repository - defined in irias_object.c */
irias_objects = hashbin_new(HB_LOCK);
if (!irias_objects) {
IRDA_WARNING("%s: Can't allocate irias_objects hashbin!\n",
__func__);
hashbin_delete(iriap, NULL);
return -ENOMEM;
}
lockdep_set_class_and_name(&irias_objects->hb_spinlock, &irias_objects_key,
"irias_objects");
/*
* Register some default services for IrLMP
*/
hints = irlmp_service_to_hint(S_COMPUTER);
service_handle = irlmp_register_service(hints);
/* Register the Device object with LM-IAS */
obj = irias_new_object("Device", IAS_DEVICE_ID);
irias_add_string_attrib(obj, "DeviceName", "Linux", IAS_KERNEL_ATTR);
oct_seq[0] = 0x01; /* Version 1 */
oct_seq[1] = 0x00; /* IAS support bits */
oct_seq[2] = 0x00; /* LM-MUX support bits */
#ifdef CONFIG_IRDA_ULTRA
oct_seq[2] |= 0x04; /* Connectionless Data support */
#endif
irias_add_octseq_attrib(obj, "IrLMPSupport", oct_seq, 3,
IAS_KERNEL_ATTR);
irias_insert_object(obj);
/*
* Register server support with IrLMP so we can accept incoming
* connections
*/
server = iriap_open(LSAP_IAS, IAS_SERVER, NULL, NULL);
if (!server) {
IRDA_DEBUG(0, "%s(), unable to open server\n", __func__);
return -1;
}
iriap_register_lsap(server, LSAP_IAS, IAS_SERVER);
return 0;
}
/*
* Function iriap_cleanup (void)
*
* Initializes the IrIAP layer, called by the module cleanup code in
* irmod.c
*/
void iriap_cleanup(void)
{
irlmp_unregister_service(service_handle);
hashbin_delete(iriap, (FREE_FUNC) __iriap_close);
hashbin_delete(irias_objects, (FREE_FUNC) __irias_delete_object);
}
/*
* Function iriap_open (void)
*
* Opens an instance of the IrIAP layer, and registers with IrLMP
*/
struct iriap_cb *iriap_open(__u8 slsap_sel, int mode, void *priv,
CONFIRM_CALLBACK callback)
{
struct iriap_cb *self;
IRDA_DEBUG(2, "%s()\n", __func__);
self = kzalloc(sizeof(*self), GFP_ATOMIC);
if (!self) {
IRDA_WARNING("%s: Unable to kmalloc!\n", __func__);
return NULL;
}
/*
* Initialize instance
*/
self->magic = IAS_MAGIC;
self->mode = mode;
if (mode == IAS_CLIENT)
iriap_register_lsap(self, slsap_sel, mode);
self->confirm = callback;
self->priv = priv;
/* iriap_getvaluebyclass_request() will construct packets before
* we connect, so this must have a sane value... Jean II */
self->max_header_size = LMP_MAX_HEADER;
init_timer(&self->watchdog_timer);
hashbin_insert(iriap, (irda_queue_t *) self, (long) self, NULL);
/* Initialize state machines */
iriap_next_client_state(self, S_DISCONNECT);
iriap_next_call_state(self, S_MAKE_CALL);
iriap_next_server_state(self, R_DISCONNECT);
iriap_next_r_connect_state(self, R_WAITING);
return self;
}
EXPORT_SYMBOL(iriap_open);
/*
* Function __iriap_close (self)
*
* Removes (deallocates) the IrIAP instance
*
*/
static void __iriap_close(struct iriap_cb *self)
{
IRDA_DEBUG(4, "%s()\n", __func__);
IRDA_ASSERT(self != NULL, return;);
IRDA_ASSERT(self->magic == IAS_MAGIC, return;);
del_timer(&self->watchdog_timer);
if (self->request_skb)
dev_kfree_skb(self->request_skb);
self->magic = 0;
kfree(self);
}
/*
* Function iriap_close (void)
*
* Closes IrIAP and deregisters with IrLMP
*/
void iriap_close(struct iriap_cb *self)
{
struct iriap_cb *entry;
IRDA_DEBUG(2, "%s()\n", __func__);
IRDA_ASSERT(self != NULL, return;);
IRDA_ASSERT(self->magic == IAS_MAGIC, return;);
if (self->lsap) {
irlmp_close_lsap(self->lsap);
self->lsap = NULL;
}
entry = (struct iriap_cb *) hashbin_remove(iriap, (long) self, NULL);
IRDA_ASSERT(entry == self, return;);
__iriap_close(self);
}
EXPORT_SYMBOL(iriap_close);
static int iriap_register_lsap(struct iriap_cb *self, __u8 slsap_sel, int mode)
{
notify_t notify;
IRDA_DEBUG(2, "%s()\n", __func__);
irda_notify_init(&notify);
notify.connect_confirm = iriap_connect_confirm;
notify.connect_indication = iriap_connect_indication;
notify.disconnect_indication = iriap_disconnect_indication;
notify.data_indication = iriap_data_indication;
notify.instance = self;
if (mode == IAS_CLIENT)
strcpy(notify.name, "IrIAS cli");
else
strcpy(notify.name, "IrIAS srv");
self->lsap = irlmp_open_lsap(slsap_sel, &notify, 0);
if (self->lsap == NULL) {
IRDA_ERROR("%s: Unable to allocated LSAP!\n", __func__);
return -1;
}
self->slsap_sel = self->lsap->slsap_sel;
return 0;
}
/*
* Function iriap_disconnect_indication (handle, reason)
*
* Got disconnect, so clean up everything associated with this connection
*
*/
static void iriap_disconnect_indication(void *instance, void *sap,
LM_REASON reason,
struct sk_buff *skb)
{
struct iriap_cb *self;
IRDA_DEBUG(4, "%s(), reason=%s\n", __func__, irlmp_reasons[reason]);
self = (struct iriap_cb *) instance;
IRDA_ASSERT(self != NULL, return;);
IRDA_ASSERT(self->magic == IAS_MAGIC, return;);
IRDA_ASSERT(iriap != NULL, return;);
del_timer(&self->watchdog_timer);
/* Not needed */
if (skb)
dev_kfree_skb(skb);
if (self->mode == IAS_CLIENT) {
IRDA_DEBUG(4, "%s(), disconnect as client\n", __func__);
iriap_do_client_event(self, IAP_LM_DISCONNECT_INDICATION,
NULL);
/*
* Inform service user that the request failed by sending
* it a NULL value. Warning, the client might close us, so
* remember no to use self anymore after calling confirm
*/
if (self->confirm)
self->confirm(IAS_DISCONNECT, 0, NULL, self->priv);
} else {
IRDA_DEBUG(4, "%s(), disconnect as server\n", __func__);
iriap_do_server_event(self, IAP_LM_DISCONNECT_INDICATION,
NULL);
iriap_close(self);
}
}
/*
* Function iriap_disconnect_request (handle)
*/
static void iriap_disconnect_request(struct iriap_cb *self)
{
struct sk_buff *tx_skb;
IRDA_DEBUG(4, "%s()\n", __func__);
IRDA_ASSERT(self != NULL, return;);
IRDA_ASSERT(self->magic == IAS_MAGIC, return;);
tx_skb = alloc_skb(LMP_MAX_HEADER, GFP_ATOMIC);
if (tx_skb == NULL) {
IRDA_DEBUG(0,
"%s(), Could not allocate an sk_buff of length %d\n",
__func__, LMP_MAX_HEADER);
return;
}
/*
* Reserve space for MUX control and LAP header
*/
skb_reserve(tx_skb, LMP_MAX_HEADER);
irlmp_disconnect_request(self->lsap, tx_skb);
}
/*
* Function iriap_getvaluebyclass (addr, name, attr)
*
* Retrieve all values from attribute in all objects with given class
* name
*/
int iriap_getvaluebyclass_request(struct iriap_cb *self,
__u32 saddr, __u32 daddr,
char *name, char *attr)
{
struct sk_buff *tx_skb;
int name_len, attr_len, skb_len;
__u8 *frame;
IRDA_ASSERT(self != NULL, return -1;);
IRDA_ASSERT(self->magic == IAS_MAGIC, return -1;);
/* Client must supply the destination device address */
if (!daddr)
return -1;
self->daddr = daddr;
self->saddr = saddr;
/*
* Save operation, so we know what the later indication is about
*/
self->operation = GET_VALUE_BY_CLASS;
/* Give ourselves 10 secs to finish this operation */
iriap_start_watchdog_timer(self, 10*HZ);
name_len = strlen(name); /* Up to IAS_MAX_CLASSNAME = 60 */
attr_len = strlen(attr); /* Up to IAS_MAX_ATTRIBNAME = 60 */
skb_len = self->max_header_size+2+name_len+1+attr_len+4;
tx_skb = alloc_skb(skb_len, GFP_ATOMIC);
if (!tx_skb)
return -ENOMEM;
/* Reserve space for MUX and LAP header */
skb_reserve(tx_skb, self->max_header_size);
skb_put(tx_skb, 3+name_len+attr_len);
frame = tx_skb->data;
/* Build frame */
frame[0] = IAP_LST | GET_VALUE_BY_CLASS;
frame[1] = name_len; /* Insert length of name */
memcpy(frame+2, name, name_len); /* Insert name */
frame[2+name_len] = attr_len; /* Insert length of attr */
memcpy(frame+3+name_len, attr, attr_len); /* Insert attr */
iriap_do_client_event(self, IAP_CALL_REQUEST_GVBC, tx_skb);
/* Drop reference count - see state_s_disconnect(). */
dev_kfree_skb(tx_skb);
return 0;
}
EXPORT_SYMBOL(iriap_getvaluebyclass_request);
/*
* Function iriap_getvaluebyclass_confirm (self, skb)
*
* Got result from GetValueByClass command. Parse it and return result
* to service user.
*
*/
static void iriap_getvaluebyclass_confirm(struct iriap_cb *self,
struct sk_buff *skb)
{
struct ias_value *value;
int charset;
__u32 value_len;
__u32 tmp_cpu32;
__u16 obj_id;
__u16 len;
__u8 type;
__u8 *fp;
int n;
IRDA_ASSERT(self != NULL, return;);
IRDA_ASSERT(self->magic == IAS_MAGIC, return;);
IRDA_ASSERT(skb != NULL, return;);
/* Initialize variables */
fp = skb->data;
n = 2;
/* Get length, MSB first */
len = get_unaligned_be16(fp + n);
n += 2;
IRDA_DEBUG(4, "%s(), len=%d\n", __func__, len);
/* Get object ID, MSB first */
obj_id = get_unaligned_be16(fp + n);
n += 2;
type = fp[n++];
IRDA_DEBUG(4, "%s(), Value type = %d\n", __func__, type);
switch (type) {
case IAS_INTEGER:
memcpy(&tmp_cpu32, fp+n, 4); n += 4;
be32_to_cpus(&tmp_cpu32);
value = irias_new_integer_value(tmp_cpu32);
/* Legal values restricted to 0x01-0x6f, page 15 irttp */
IRDA_DEBUG(4, "%s(), lsap=%d\n", __func__, value->t.integer);
break;
case IAS_STRING:
charset = fp[n++];
switch (charset) {
case CS_ASCII:
break;
/* case CS_ISO_8859_1: */
/* case CS_ISO_8859_2: */
/* case CS_ISO_8859_3: */
/* case CS_ISO_8859_4: */
/* case CS_ISO_8859_5: */
/* case CS_ISO_8859_6: */
/* case CS_ISO_8859_7: */
/* case CS_ISO_8859_8: */
/* case CS_ISO_8859_9: */
/* case CS_UNICODE: */
default:
IRDA_DEBUG(0, "%s(), charset %s, not supported\n",
__func__, ias_charset_types[charset]);
/* Aborting, close connection! */
iriap_disconnect_request(self);
return;
/* break; */
}
value_len = fp[n++];
IRDA_DEBUG(4, "%s(), strlen=%d\n", __func__, value_len);
/* Make sure the string is null-terminated */
if (n + value_len < skb->len)
fp[n + value_len] = 0x00;
IRDA_DEBUG(4, "Got string %s\n", fp+n);
/* Will truncate to IAS_MAX_STRING bytes */
value = irias_new_string_value(fp+n);
break;
case IAS_OCT_SEQ:
value_len = get_unaligned_be16(fp + n);
n += 2;
/* Will truncate to IAS_MAX_OCTET_STRING bytes */
value = irias_new_octseq_value(fp+n, value_len);
break;
default:
value = irias_new_missing_value();
break;
}
/* Finished, close connection! */
iriap_disconnect_request(self);
/* Warning, the client might close us, so remember no to use self
* anymore after calling confirm
*/
if (self->confirm)
self->confirm(IAS_SUCCESS, obj_id, value, self->priv);
else {
IRDA_DEBUG(0, "%s(), missing handler!\n", __func__);
irias_delete_value(value);
}
}
/*
* Function iriap_getvaluebyclass_response ()
*
* Send answer back to remote LM-IAS
*
*/
static void iriap_getvaluebyclass_response(struct iriap_cb *self,
__u16 obj_id,
__u8 ret_code,
struct ias_value *value)
{
struct sk_buff *tx_skb;
int n;
__be32 tmp_be32;
__be16 tmp_be16;
__u8 *fp;
IRDA_DEBUG(4, "%s()\n", __func__);
IRDA_ASSERT(self != NULL, return;);
IRDA_ASSERT(self->magic == IAS_MAGIC, return;);
IRDA_ASSERT(value != NULL, return;);
IRDA_ASSERT(value->len <= 1024, return;);
/* Initialize variables */
n = 0;
/*
* We must adjust the size of the response after the length of the
* value. We add 32 bytes because of the 6 bytes for the frame and
* max 5 bytes for the value coding.
*/
tx_skb = alloc_skb(value->len + self->max_header_size + 32,
GFP_ATOMIC);
if (!tx_skb)
return;
/* Reserve space for MUX and LAP header */
skb_reserve(tx_skb, self->max_header_size);
skb_put(tx_skb, 6);
fp = tx_skb->data;
/* Build frame */
fp[n++] = GET_VALUE_BY_CLASS | IAP_LST;
fp[n++] = ret_code;
/* Insert list length (MSB first) */
tmp_be16 = htons(0x0001);
memcpy(fp+n, &tmp_be16, 2); n += 2;
/* Insert object identifier ( MSB first) */
tmp_be16 = cpu_to_be16(obj_id);
memcpy(fp+n, &tmp_be16, 2); n += 2;
switch (value->type) {
case IAS_STRING:
skb_put(tx_skb, 3 + value->len);
fp[n++] = value->type;
fp[n++] = 0; /* ASCII */
fp[n++] = (__u8) value->len;
memcpy(fp+n, value->t.string, value->len); n+=value->len;
break;
case IAS_INTEGER:
skb_put(tx_skb, 5);
fp[n++] = value->type;
tmp_be32 = cpu_to_be32(value->t.integer);
memcpy(fp+n, &tmp_be32, 4); n += 4;
break;
case IAS_OCT_SEQ:
skb_put(tx_skb, 3 + value->len);
fp[n++] = value->type;
tmp_be16 = cpu_to_be16(value->len);
memcpy(fp+n, &tmp_be16, 2); n += 2;
memcpy(fp+n, value->t.oct_seq, value->len); n+=value->len;
break;
case IAS_MISSING:
IRDA_DEBUG( 3, "%s: sending IAS_MISSING\n", __func__);
skb_put(tx_skb, 1);
fp[n++] = value->type;
break;
default:
IRDA_DEBUG(0, "%s(), type not implemented!\n", __func__);
break;
}
iriap_do_r_connect_event(self, IAP_CALL_RESPONSE, tx_skb);
/* Drop reference count - see state_r_execute(). */
dev_kfree_skb(tx_skb);
}
/*
* Function iriap_getvaluebyclass_indication (self, skb)
*
* getvaluebyclass is requested from peer LM-IAS
*
*/
static void iriap_getvaluebyclass_indication(struct iriap_cb *self,
struct sk_buff *skb)
{
struct ias_object *obj;
struct ias_attrib *attrib;
int name_len;
int attr_len;
char name[IAS_MAX_CLASSNAME + 1]; /* 60 bytes */
char attr[IAS_MAX_ATTRIBNAME + 1]; /* 60 bytes */
__u8 *fp;
int n;
IRDA_DEBUG(4, "%s()\n", __func__);
IRDA_ASSERT(self != NULL, return;);
IRDA_ASSERT(self->magic == IAS_MAGIC, return;);
IRDA_ASSERT(skb != NULL, return;);
fp = skb->data;
n = 1;
name_len = fp[n++];
IRDA_ASSERT(name_len < IAS_MAX_CLASSNAME + 1, return;);
memcpy(name, fp+n, name_len); n+=name_len;
name[name_len] = '\0';
attr_len = fp[n++];
IRDA_ASSERT(attr_len < IAS_MAX_ATTRIBNAME + 1, return;);
memcpy(attr, fp+n, attr_len); n+=attr_len;
attr[attr_len] = '\0';
IRDA_DEBUG(4, "LM-IAS: Looking up %s: %s\n", name, attr);
obj = irias_find_object(name);
if (obj == NULL) {
IRDA_DEBUG(2, "LM-IAS: Object %s not found\n", name);
iriap_getvaluebyclass_response(self, 0x1235, IAS_CLASS_UNKNOWN,
&irias_missing);
return;
}
IRDA_DEBUG(4, "LM-IAS: found %s, id=%d\n", obj->name, obj->id);
attrib = irias_find_attrib(obj, attr);
if (attrib == NULL) {
IRDA_DEBUG(2, "LM-IAS: Attribute %s not found\n", attr);
iriap_getvaluebyclass_response(self, obj->id,
IAS_ATTRIB_UNKNOWN,
&irias_missing);
return;
}
/* We have a match; send the value. */
iriap_getvaluebyclass_response(self, obj->id, IAS_SUCCESS,
attrib->value);
}
/*
* Function iriap_send_ack (void)
*
* Currently not used
*
*/
void iriap_send_ack(struct iriap_cb *self)
{
struct sk_buff *tx_skb;
__u8 *frame;
IRDA_DEBUG(2, "%s()\n", __func__);
IRDA_ASSERT(self != NULL, return;);
IRDA_ASSERT(self->magic == IAS_MAGIC, return;);
tx_skb = alloc_skb(LMP_MAX_HEADER + 1, GFP_ATOMIC);
if (!tx_skb)
return;
/* Reserve space for MUX and LAP header */
skb_reserve(tx_skb, self->max_header_size);
skb_put(tx_skb, 1);
frame = tx_skb->data;
/* Build frame */
frame[0] = IAP_LST | IAP_ACK | self->operation;
irlmp_data_request(self->lsap, tx_skb);
}
void iriap_connect_request(struct iriap_cb *self)
{
int ret;
IRDA_ASSERT(self != NULL, return;);
IRDA_ASSERT(self->magic == IAS_MAGIC, return;);
ret = irlmp_connect_request(self->lsap, LSAP_IAS,
self->saddr, self->daddr,
NULL, NULL);
if (ret < 0) {
IRDA_DEBUG(0, "%s(), connect failed!\n", __func__);
self->confirm(IAS_DISCONNECT, 0, NULL, self->priv);
}
}
/*
* Function iriap_connect_confirm (handle, skb)
*
* LSAP connection confirmed!
*
*/
static void iriap_connect_confirm(void *instance, void *sap,
struct qos_info *qos, __u32 max_seg_size,
__u8 max_header_size,
struct sk_buff *skb)
{
struct iriap_cb *self;
self = (struct iriap_cb *) instance;
IRDA_ASSERT(self != NULL, return;);
IRDA_ASSERT(self->magic == IAS_MAGIC, return;);
IRDA_ASSERT(skb != NULL, return;);
self->max_data_size = max_seg_size;
self->max_header_size = max_header_size;
del_timer(&self->watchdog_timer);
iriap_do_client_event(self, IAP_LM_CONNECT_CONFIRM, skb);
/* Drop reference count - see state_s_make_call(). */
dev_kfree_skb(skb);
}
/*
* Function iriap_connect_indication ( handle, skb)
*
* Remote LM-IAS is requesting connection
*
*/
static void iriap_connect_indication(void *instance, void *sap,
struct qos_info *qos, __u32 max_seg_size,
__u8 max_header_size,
struct sk_buff *skb)
{
struct iriap_cb *self, *new;
IRDA_DEBUG(1, "%s()\n", __func__);
self = (struct iriap_cb *) instance;
IRDA_ASSERT(skb != NULL, return;);
IRDA_ASSERT(self != NULL, goto out;);
IRDA_ASSERT(self->magic == IAS_MAGIC, goto out;);
/* Start new server */
new = iriap_open(LSAP_IAS, IAS_SERVER, NULL, NULL);
if (!new) {
IRDA_DEBUG(0, "%s(), open failed\n", __func__);
goto out;
}
/* Now attach up the new "socket" */
new->lsap = irlmp_dup(self->lsap, new);
if (!new->lsap) {
IRDA_DEBUG(0, "%s(), dup failed!\n", __func__);
goto out;
}
new->max_data_size = max_seg_size;
new->max_header_size = max_header_size;
/* Clean up the original one to keep it in listen state */
irlmp_listen(self->lsap);
iriap_do_server_event(new, IAP_LM_CONNECT_INDICATION, skb);
out:
/* Drop reference count - see state_r_disconnect(). */
dev_kfree_skb(skb);
}
/*
* Function iriap_data_indication (handle, skb)
*
* Receives data from connection identified by handle from IrLMP
*
*/
static int iriap_data_indication(void *instance, void *sap,
struct sk_buff *skb)
{
struct iriap_cb *self;
__u8 *frame;
__u8 opcode;
IRDA_DEBUG(3, "%s()\n", __func__);
self = (struct iriap_cb *) instance;
IRDA_ASSERT(skb != NULL, return 0;);
IRDA_ASSERT(self != NULL, goto out;);
IRDA_ASSERT(self->magic == IAS_MAGIC, goto out;);
frame = skb->data;
if (self->mode == IAS_SERVER) {
/* Call server */
IRDA_DEBUG(4, "%s(), Calling server!\n", __func__);
iriap_do_r_connect_event(self, IAP_RECV_F_LST, skb);
goto out;
}
opcode = frame[0];
if (~opcode & IAP_LST) {
IRDA_WARNING("%s:, IrIAS multiframe commands or "
"results is not implemented yet!\n",
__func__);
goto out;
}
/* Check for ack frames since they don't contain any data */
if (opcode & IAP_ACK) {
IRDA_DEBUG(0, "%s() Got ack frame!\n", __func__);
goto out;
}
opcode &= ~IAP_LST; /* Mask away LST bit */
switch (opcode) {
case GET_INFO_BASE:
IRDA_DEBUG(0, "IrLMP GetInfoBaseDetails not implemented!\n");
break;
case GET_VALUE_BY_CLASS:
iriap_do_call_event(self, IAP_RECV_F_LST, NULL);
switch (frame[1]) {
case IAS_SUCCESS:
iriap_getvaluebyclass_confirm(self, skb);
break;
case IAS_CLASS_UNKNOWN:
IRDA_DEBUG(1, "%s(), No such class!\n", __func__);
/* Finished, close connection! */
iriap_disconnect_request(self);
/*
* Warning, the client might close us, so remember
* no to use self anymore after calling confirm
*/
if (self->confirm)
self->confirm(IAS_CLASS_UNKNOWN, 0, NULL,
self->priv);
break;
case IAS_ATTRIB_UNKNOWN:
IRDA_DEBUG(1, "%s(), No such attribute!\n", __func__);
/* Finished, close connection! */
iriap_disconnect_request(self);
/*
* Warning, the client might close us, so remember
* no to use self anymore after calling confirm
*/
if (self->confirm)
self->confirm(IAS_ATTRIB_UNKNOWN, 0, NULL,
self->priv);
break;
}
break;
default:
IRDA_DEBUG(0, "%s(), Unknown op-code: %02x\n", __func__,
opcode);
break;
}
out:
/* Cleanup - sub-calls will have done skb_get() as needed. */
dev_kfree_skb(skb);
return 0;
}
/*
* Function iriap_call_indication (self, skb)
*
* Received call to server from peer LM-IAS
*
*/
void iriap_call_indication(struct iriap_cb *self, struct sk_buff *skb)
{
__u8 *fp;
__u8 opcode;
IRDA_DEBUG(4, "%s()\n", __func__);
IRDA_ASSERT(self != NULL, return;);
IRDA_ASSERT(self->magic == IAS_MAGIC, return;);
IRDA_ASSERT(skb != NULL, return;);
fp = skb->data;
opcode = fp[0];
if (~opcode & 0x80) {
IRDA_WARNING("%s: IrIAS multiframe commands or results "
"is not implemented yet!\n", __func__);
return;
}
opcode &= 0x7f; /* Mask away LST bit */
switch (opcode) {
case GET_INFO_BASE:
IRDA_WARNING("%s: GetInfoBaseDetails not implemented yet!\n",
__func__);
break;
case GET_VALUE_BY_CLASS:
iriap_getvaluebyclass_indication(self, skb);
break;
}
/* skb will be cleaned up in iriap_data_indication */
}
/*
* Function iriap_watchdog_timer_expired (data)
*
* Query has taken too long time, so abort
*
*/
static void iriap_watchdog_timer_expired(void *data)
{
struct iriap_cb *self = (struct iriap_cb *) data;
IRDA_ASSERT(self != NULL, return;);
IRDA_ASSERT(self->magic == IAS_MAGIC, return;);
/* iriap_close(self); */
}
#ifdef CONFIG_PROC_FS
static const char *const ias_value_types[] = {
"IAS_MISSING",
"IAS_INTEGER",
"IAS_OCT_SEQ",
"IAS_STRING"
};
static inline struct ias_object *irias_seq_idx(loff_t pos)
{
struct ias_object *obj;
for (obj = (struct ias_object *) hashbin_get_first(irias_objects);
obj; obj = (struct ias_object *) hashbin_get_next(irias_objects)) {
if (pos-- == 0)
break;
}
return obj;
}
static void *irias_seq_start(struct seq_file *seq, loff_t *pos)
{
spin_lock_irq(&irias_objects->hb_spinlock);
return *pos ? irias_seq_idx(*pos - 1) : SEQ_START_TOKEN;
}
static void *irias_seq_next(struct seq_file *seq, void *v, loff_t *pos)
{
++*pos;
return (v == SEQ_START_TOKEN)
? (void *) hashbin_get_first(irias_objects)
: (void *) hashbin_get_next(irias_objects);
}
static void irias_seq_stop(struct seq_file *seq, void *v)
{
spin_unlock_irq(&irias_objects->hb_spinlock);
}
static int irias_seq_show(struct seq_file *seq, void *v)
{
if (v == SEQ_START_TOKEN)
seq_puts(seq, "LM-IAS Objects:\n");
else {
struct ias_object *obj = v;
struct ias_attrib *attrib;
IRDA_ASSERT(obj->magic == IAS_OBJECT_MAGIC, return -EINVAL;);
seq_printf(seq, "name: %s, id=%d\n",
obj->name, obj->id);
/* 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(&obj->attribs->hb_spinlock);
/* List all attributes for this object */
for (attrib = (struct ias_attrib *) hashbin_get_first(obj->attribs);
attrib != NULL;
attrib = (struct ias_attrib *) hashbin_get_next(obj->attribs)) {
IRDA_ASSERT(attrib->magic == IAS_ATTRIB_MAGIC,
goto outloop; );
seq_printf(seq, " - Attribute name: \"%s\", ",
attrib->name);
seq_printf(seq, "value[%s]: ",
ias_value_types[attrib->value->type]);
switch (attrib->value->type) {
case IAS_INTEGER:
seq_printf(seq, "%d\n",
attrib->value->t.integer);
break;
case IAS_STRING:
seq_printf(seq, "\"%s\"\n",
attrib->value->t.string);
break;
case IAS_OCT_SEQ:
seq_printf(seq, "octet sequence (%d bytes)\n",
attrib->value->len);
break;
case IAS_MISSING:
seq_puts(seq, "missing\n");
break;
default:
seq_printf(seq, "type %d?\n",
attrib->value->type);
}
seq_putc(seq, '\n');
}
IRDA_ASSERT_LABEL(outloop:)
spin_unlock(&obj->attribs->hb_spinlock);
}
return 0;
}
static const struct seq_operations irias_seq_ops = {
.start = irias_seq_start,
.next = irias_seq_next,
.stop = irias_seq_stop,
.show = irias_seq_show,
};
static int irias_seq_open(struct inode *inode, struct file *file)
{
IRDA_ASSERT( irias_objects != NULL, return -EINVAL;);
return seq_open(file, &irias_seq_ops);
}
const struct file_operations irias_seq_fops = {
.owner = THIS_MODULE,
.open = irias_seq_open,
.read = seq_read,
.llseek = seq_lseek,
.release = seq_release,
};
#endif /* PROC_FS */
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