2 * IGMP Snooping Layer: IGMP Snooping module runs at layer 2. IGMP
3 * Snooping layer uses the multicast information in the IGMP messages
4 * exchanged between the participating hosts and multicast routers to
5 * update the multicast forwarding database. This file contains the
6 * common code routines of IGS module.
8 * Copyright (C) 2009, Broadcom Corporation
11 * This is UNPUBLISHED PROPRIETARY SOURCE CODE of Broadcom Corporation;
12 * the contents of this file may not be disclosed to third parties, copied
13 * or duplicated in any form, in whole or in part, without the prior
14 * written permission of Broadcom Corporation.
16 * $Id: igsc.c,v 1.4 2008/11/19 01:36:25 Exp $
21 #include <bcmendian.h>
22 #include <proto/bcmip.h>
27 #include <osl_linux.h>
28 #else /* defined(osl_xx) */
29 #error "Unsupported osl"
30 #endif /* defined(osl_xx) */
32 #include "emfc_export.h"
33 #include "igs_export.h"
34 #include "igsc_export.h"
38 static mc_grp_spl_t mc_addr_rsvd
[] =
40 { 0xe0000001, 0xffffffff }, /* All hosts */
41 { 0xe0000002, 0xffffffff }, /* All routers */
42 { 0xe0000004, 0xffffffff }, /* DVMRP routers */
43 { 0xe0000005, 0xffffffff }, /* OSPF1 routers */
44 { 0xe0000006, 0xffffffff }, /* OSPF2 routers */
45 { 0xe0000009, 0xffffffff }, /* RIP v2 routers */
46 { 0xe000000d, 0xffffffff }, /* PIMd routers */
47 { 0xe0000010, 0xffffffff }, /* IGMP v3 routers */
48 { 0xe00000fb, 0xffffffff }, /* Reserved */
49 { 0xe000ff87, 0xffffffff }, /* Reserved */
50 { 0xeffffffa, 0xffffffff }, /* UPnP */
54 igsc_is_reserved(uint32 addr
)
58 for (i
= 0; i
< sizeof(mc_addr_rsvd
)/sizeof(mc_grp_spl_t
); i
++)
60 if ((addr
& mc_addr_rsvd
[i
].mask
) ==
61 (mc_addr_rsvd
[i
].addr
& mc_addr_rsvd
[i
].mask
))
71 * Description: This function is called if the snooper doesn't receive
72 * membership query from a router for timeout interval.
73 * It deletes the router port entry from the list. If this
74 * is the last router on the interface then the EMF router
75 * port entry is also deleted.
77 * Input: rtlist_ptr - Multicast router interface/port entry
80 igsc_rtlist_timer(igsc_rtlist_t
*rtlist_ptr
)
83 igsc_rtlist_t
*rtl_ptr
;
84 bool mr_port_found
= FALSE
;
85 igsc_info_t
*igsc_info
;
87 igsc_info
= rtlist_ptr
->igsc_info
;
89 /* Delete the expired router port entry */
90 clist_delete(&rtlist_ptr
->list
);
92 /* Check if there are more routers on this port/interface */
93 for (ptr
= igsc_info
->rtlist_head
.next
;
94 ptr
!= &igsc_info
->rtlist_head
; ptr
= ptr
->next
)
96 rtl_ptr
= clist_entry(ptr
, igsc_rtlist_t
, list
);
97 if (rtl_ptr
->ifp
== rtlist_ptr
->ifp
)
104 /* Last multicast router on this port/interface */
107 IGS_DEBUG("Delete the router port %p in the EMF\n",
109 emfc_rtport_del(igsc_info
->emf_handle
, rtlist_ptr
->ifp
);
112 MFREE(igsc_info
->osh
, rtlist_ptr
, sizeof(igsc_rtlist_t
));
118 * Description: This function is called to find the entry in the router
119 * port list given the IP Address and the interface pointer.
121 * Input: igsc_info - IGSC Global Instance handle
122 * ifp - Interface pointer
123 * mr_ip - IP address of the router
125 * Return: Pointer to the entry found or NULL otherwise
127 static igsc_rtlist_t
*
128 igsc_rtlist_find(igsc_info_t
*igsc_info
, void *ifp
, uint32 mr_ip
)
131 igsc_rtlist_t
*rtl_ptr
;
133 OSL_LOCK(igsc_info
->rtlist_lock
);
135 for (ptr
= igsc_info
->rtlist_head
.next
;
136 ptr
!= &igsc_info
->rtlist_head
; ptr
= ptr
->next
)
138 rtl_ptr
= clist_entry(ptr
, igsc_rtlist_t
, list
);
140 if ((rtl_ptr
->ifp
== ifp
) && (rtl_ptr
->mr_ip
== mr_ip
))
142 OSL_UNLOCK(igsc_info
->rtlist_lock
);
143 IGS_DEBUG("Router port entry %x %p found\n",
149 OSL_UNLOCK(igsc_info
->rtlist_lock
);
155 * Description: This function is called when the snooper receives IGMP
156 * membership query on one of the ports. It adds an entry
157 * to the multicast router port list. Each entry of the
158 * list contains the IP address of the multicast router
159 * and the interface/port on which it is present. It calls
160 * the EMF function to add a router port entry to the list
163 * Input: igsc_info - IGSC Global Instance handle
164 * ifp - Interface pointer
165 * mr_ip - IP address of the router
167 * Return: SUCCESS/FAILURE
170 igsc_rtlist_add(igsc_info_t
*igsc_info
, void *ifp
, uint32 mr_ip
)
172 igsc_rtlist_t
*rtlist_ptr
;
174 /* If the router port list entry exists already then refresh the
175 * timer for this entry.
177 if ((rtlist_ptr
= igsc_rtlist_find(igsc_info
, ifp
, mr_ip
)) != NULL
)
179 osl_timer_update(rtlist_ptr
->rtlist_timer
, igsc_info
->query_intv
,
181 IGS_DEBUG("Duplicate router port entry %x %p\n", mr_ip
, ifp
);
185 /* Allocate and intialize the entry */
186 rtlist_ptr
= MALLOC(igsc_info
->osh
, sizeof(igsc_rtlist_t
));
187 if (rtlist_ptr
== NULL
)
189 IGS_ERROR("Failed to allocate memory size %d for rtport list\n",
190 sizeof(igsc_rtlist_t
));
194 rtlist_ptr
->ifp
= ifp
;
195 rtlist_ptr
->mr_ip
= mr_ip
;
196 rtlist_ptr
->igsc_info
= igsc_info
;
198 OSL_LOCK(igsc_info
->rtlist_lock
);
200 /* Add the entry to the EMF router port list */
201 if (emfc_rtport_add(igsc_info
->emf_handle
, ifp
) != SUCCESS
)
203 OSL_UNLOCK(igsc_info
->rtlist_lock
);
204 MFREE(igsc_info
->osh
, rtlist_ptr
, sizeof(igsc_rtlist_t
));
205 IGS_ERROR("Failed to add EMF rtport entry for %p\n", ifp
);
209 /* Add timer to delete the entry on igmp query timeout */
210 rtlist_ptr
->rtlist_timer
= osl_timer_init("MR_PORT_LIST_TIMER",
211 (void (*)(void *))igsc_rtlist_timer
,
214 if (rtlist_ptr
->rtlist_timer
== NULL
)
216 OSL_UNLOCK(igsc_info
->rtlist_lock
);
217 emfc_rtport_del(igsc_info
->emf_handle
, ifp
);
218 MFREE(igsc_info
->osh
, rtlist_ptr
, sizeof(igsc_rtlist_t
));
219 IGS_ERROR("Failed to allocate memory size %d for timer\n",
220 sizeof(osl_timer_t
));
224 osl_timer_add(rtlist_ptr
->rtlist_timer
, igsc_info
->query_intv
, FALSE
);
226 /* Add the entry to IGS router port list */
227 clist_add_head(&igsc_info
->rtlist_head
, &rtlist_ptr
->list
);
229 OSL_UNLOCK(igsc_info
->rtlist_lock
);
235 * Description: This function is called to clear the IGSC router port list.
236 * It also call the API to delete the corresponding EMF router
239 * Input: igsc_info - IGSC Global Instance handle
242 igsc_rtlist_clear(igsc_info_t
*igsc_info
)
245 igsc_rtlist_t
*rtl_ptr
;
247 OSL_LOCK(igsc_info
->rtlist_lock
);
249 for (ptr
= igsc_info
->rtlist_head
.next
;
250 ptr
!= &igsc_info
->rtlist_head
; ptr
= ptr
->next
)
252 rtl_ptr
= clist_entry(ptr
, igsc_rtlist_t
, list
);
253 osl_timer_del(rtl_ptr
->rtlist_timer
);
254 emfc_rtport_del(igsc_info
->emf_handle
, rtl_ptr
->ifp
);
256 MFREE(igsc_info
->osh
, rtl_ptr
, sizeof(igsc_rtlist_t
));
259 OSL_UNLOCK(igsc_info
->rtlist_lock
);
265 * Description: This function is called by EMFL when an IGMP frame
266 * is received. Based on the IGMP packet type it either
267 * adds, deletes or refreshes the MFDB entry.
269 * Input: s - Snooper global instance data cookie
270 * ifp - Pointer to interface the frame arrived on.
271 * iph - Points to start of IP header in the packet.
272 * igmph - Points to start of IGMP header in the packet.
273 * from_rp - TRUE when received from router port.
275 * Return: EMF_FLOOD - Flood the frame.
276 * EMF_SENDUP - Deliver the packet to IP layer.
279 igsc_input(emfc_snooper_t
*s
, void *ifp
, uint8
*iph
, uint8
*igmph
, bool from_rp
)
282 igsc_info_t
*igsc_info
;
283 uint32 mgrp_ip
, mh_ip
, dest_ip
;
287 igsc_info
= IGSC_INFO(s
);
289 IGSC_STATS_INCR(igsc_info
, igmp_packets
);
293 IGS_DEBUG("Ignoring IGMP frame from router port\n");
294 IGSC_STATS_INCR(igsc_info
, igmp_not_handled
);
298 mgrp_ip
= ntoh32(*((uint32
*)(igmph
+ IGMPV2_GRP_ADDR_OFFSET
)));
299 mh_ip
= ntoh32(*((uint32
*)(iph
+ IPV4_SRC_IP_OFFSET
)));
301 switch (igmph
[IGMPV2_TYPE_OFFSET
])
303 case IGMPV2_HOST_NEW_MEMBERSHIP_REPORT
:
304 /* Ignore frames received with reserved addresses */
305 dest_ip
= ntoh32(*((uint32
*)(iph
+ IPV4_DEST_IP_OFFSET
)));
306 if (igsc_is_reserved(dest_ip
))
308 IGSC_STATS_INCR(igsc_info
, igmp_not_handled
);
309 IGS_DEBUG("Reserved multicast address %x frame\n",
314 /* When a host membership report is received add/refresh the
315 * entry for the host.
317 IGSC_STATS_INCR(igsc_info
, igmp_v2reports
);
318 ret
= igsc_sdb_member_add(igsc_info
, ifp
, mgrp_ip
, mh_ip
);
320 return ((ret
== SUCCESS
) ? EMF_FORWARD
: EMF_FLOOD
);
322 case IGMPV2_LEAVE_GROUP_MESSAGE
:
323 /* Remove group entry for the host when a leave message is
326 IGSC_STATS_INCR(igsc_info
, igmp_leaves
);
327 ret
= igsc_sdb_member_del(igsc_info
, ifp
, mgrp_ip
, mh_ip
);
330 IGS_WARN("Deleting unknown member with grp %x host %x if %p",
331 mgrp_ip
, mh_ip
, ifp
);
334 case IGMPV2_HOST_MEMBERSHIP_REPORT
:
335 IGSC_STATS_INCR(igsc_info
, igmp_reports
);
338 case IGMPV2_HOST_MEMBERSHIP_QUERY
:
339 IGSC_STATS_INCR(igsc_info
, igmp_queries
);
341 /* Update the multicast router port list */
344 IGS_DEBUG("Updating router port list with %x %p\n",
346 igsc_rtlist_add(igsc_info
, ifp
, mh_ip
);
351 IGS_WARN("IGMP type %d not handled\n", igmph
[IGMPV2_TYPE_OFFSET
]);
352 IGSC_STATS_INCR(igsc_info
, igmp_not_handled
);
360 * Internet checksum routine
363 inet_cksum(uint8
*buf
, int32 len
)
383 sum
= (sum
& 0xffff) + (sum
>> 16);
386 return (hton16(~sum
));
390 * Description: This function adds the IP header, IGMP header and data.
393 igsc_igmp_pkt_encap(uint8
*ip
, uint32 src_ip
, uint32 dest_ip
,
394 uint8 igmp_type
, uint8 max_rsp
, uint32 grp_addr
)
398 /* Prepare the IP header */
399 ip
[IP_VER_OFFSET
] = ((IP_VER_4
<< 4) | (IPV4_MIN_HLEN
>> 2));
400 ip
[IPV4_TOS_OFFSET
] = 0xc0;
401 *((uint16
*)(ip
+ IPV4_LEN_OFFSET
)) = hton16(IPV4_MIN_HLEN
+ IGMP_HLEN
);
402 *((uint16
*)(ip
+ IPV4_ID_OFFSET
)) = 0;
403 *((uint16
*)(ip
+ IPV4_FRAG_OFFSET
)) = 0;
404 ip
[IPV4_TTL_OFFSET
] = 1;
405 ip
[IPV4_PROT_OFFSET
] = IP_PROT_IGMP
;
406 *((uint16
*)(ip
+ IPV4_CHKSUM_OFFSET
)) = 0;
407 *((uint32
*)(ip
+ IPV4_SRC_IP_OFFSET
)) = src_ip
;
408 *((uint32
*)(ip
+ IPV4_DEST_IP_OFFSET
)) = dest_ip
;
409 *((uint16
*)(ip
+ IPV4_CHKSUM_OFFSET
)) = inet_cksum(ip
, IPV4_MIN_HLEN
);
411 /* Fill the IGMP header fields */
412 igmp
= ip
+ IPV4_MIN_HLEN
;
413 igmp
[IGMPV2_TYPE_OFFSET
] = igmp_type
;
414 igmp
[IGMPV2_MAXRSP_TIME_OFFSET
] = max_rsp
;
415 *((uint16
*)(igmp
+ IGMPV2_CHECKSUM_OFFSET
)) = 0;
416 *((uint32
*)(igmp
+ IGMPV2_GRP_ADDR_OFFSET
)) = grp_addr
;
417 *((uint16
*)(igmp
+ IGMPV2_CHECKSUM_OFFSET
)) = inet_cksum(ip
,
418 IGMP_HLEN
+ IPV4_MIN_HLEN
);
424 * Description: This functions generates an IGMP Query. It is used to
425 * quickly determine the group members on the attached bridge
428 * Return: SUCCESS or FAILURE
431 igsc_igmp_query_send(igsc_info_t
*igsc_info
)
436 /* Build the IGMP Query packet */
437 igsc_igmp_pkt_encap((uint8
*)ip
, lan_ip
, hton32(IPV4_MCADDR_ALLHOSTS
),
438 IGMPV2_HOST_MEMBERSHIP_QUERY
, IGMPV2_MAXRSP_TIME
/ 100, 0);
440 IGS_DEBUG("Forwarding IGMP Query on to bridge ports\n");
442 return (igsc_info
->wrapper
.igs_broadcast(igsc_info
->igs_info
, (uint8
*)ip
,
443 IGMP_HLEN
+ IPV4_MIN_HLEN
,
444 IPV4_MCADDR_ALLHOSTS
));
448 * Description: This function is called by the EMFL when forwarding
451 * Input: snooper - Snooper gloabl instance data.
453 * Return: SUCCESS or FAILURE
456 igsc_emf_enabled(emfc_snooper_t
*snooper
)
458 IGS_INFO("EMF enable callback called\n");
460 /* Send an IGMP Query packet to quickly learn the members present
463 if (igsc_igmp_query_send(IGSC_INFO(snooper
)) != SUCCESS
)
465 IGS_ERROR("IGMP Query send failed\n");
473 * Description: This function is called by the EMFL when forwarding
476 * Input: snooper - Snooper gloabl instance data.
478 * Return: SUCCESS or FAILURE
481 igsc_emf_disabled(emfc_snooper_t
*snooper
)
483 IGS_INFO("EMF disable callback\n");
484 igsc_sdb_clear(IGSC_INFO(snooper
));
485 igsc_rtlist_clear(IGSC_INFO(snooper
));
490 * IGSL Packet Counters/Statistics Function
493 igsc_stats_get(igsc_info_t
*igsc_info
, igs_stats_t
*stats
, uint32 size
)
495 if (igsc_info
== NULL
)
497 IGS_ERROR("Invalid IGSC handle passed\n");
503 IGS_ERROR("Invalid buffer input\n");
507 if (size
< sizeof(igs_stats_t
))
509 IGS_ERROR("Insufficient buffer size %d\n", size
);
513 *stats
= igsc_info
->stats
;
519 * RTPORT Interface Listing
522 igsc_rtport_list(igsc_info_t
*igsc
, igs_cfg_rtport_list_t
*list
, uint32 size
)
524 int32 index
= 0, bytes
= 0;
526 igsc_rtlist_t
*rtl_ptr
;
528 for (ptr
= igsc
->rtlist_head
.next
; ptr
!= &igsc
->rtlist_head
; ptr
= ptr
->next
)
530 rtl_ptr
= clist_entry(ptr
, igsc_rtlist_t
, list
);
532 bytes
+= sizeof(igs_cfg_rtport_list_t
);
536 list
->rtport_entry
[index
].mr_ip
= rtl_ptr
->mr_ip
;
537 strncpy(list
->rtport_entry
[index
].if_name
, DEV_IFNAME(rtl_ptr
->ifp
), 16);
541 /* Update the total number of entries */
542 list
->num_entries
= index
;
548 igsc_cfg_request_process(igsc_info_t
*igsc_info
, igs_cfg_request_t
*cfg
)
550 IGS_DEBUG("IGS command identifier: %d\n", cfg
->command_id
);
552 switch (cfg
->command_id
)
554 case IGSCFG_CMD_IGS_STATS
:
555 if (igsc_stats_get(igsc_info
, (igs_stats_t
*)cfg
->arg
,
556 cfg
->size
) != SUCCESS
)
558 cfg
->status
= IGSCFG_STATUS_FAILURE
;
559 cfg
->size
= sprintf(cfg
->arg
, "IGS stats get failed\n");
562 cfg
->status
= IGSCFG_STATUS_SUCCESS
;
565 case IGSCFG_CMD_IGSDB_LIST
:
566 if (igsc_sdb_list(igsc_info
, (igs_cfg_sdb_list_t
*)cfg
->arg
,
567 cfg
->size
) != SUCCESS
)
569 cfg
->status
= IGSCFG_STATUS_FAILURE
;
570 cfg
->size
= sprintf(cfg
->arg
, "IGSDB listing failed\n");
573 cfg
->status
= IGSCFG_STATUS_SUCCESS
;
576 case IGSCFG_CMD_RTPORT_LIST
:
577 if (igsc_rtport_list(igsc_info
, (igs_cfg_rtport_list_t
*)cfg
->arg
,
578 cfg
->size
) != SUCCESS
)
580 cfg
->status
= EMFCFG_STATUS_FAILURE
;
581 cfg
->size
= sprintf(cfg
->arg
, "RTPORT list get failed\n");
584 cfg
->status
= EMFCFG_STATUS_SUCCESS
;
588 cfg
->status
= IGSCFG_STATUS_CMD_UNKNOWN
;
589 cfg
->size
= sprintf(cfg
->arg
, "Unknown command id %d\n",
596 * Description: This function is called from the OS specific module
597 * init routine to initialize the IGSL. This function
598 * primarily initializes the IGSL global data and IGSDB.
600 * Input: inst_id - IGS instance identifier.
601 * igs_info - IGSL OS Specific global data handle
602 * osh - OS abstraction layer handle
603 * wrapper - wrapper specific info
605 * Return: igsc_info - IGSL Common code global data handle
608 igsc_init(int8
*inst_id
, void *igs_info
, osl_t
*osh
, igsc_wrapper_t
*wrapper
)
610 igsc_info_t
*igsc_info
;
614 IGS_ERROR("Instance identifier NULL\n");
620 IGS_ERROR("wrapper info NULL\n");
624 IGS_DEBUG("Initializing IGMP Snooping Layer\n");
626 /* Allocate memory */
627 igsc_info
= MALLOC(osh
, sizeof(igsc_info_t
));
628 if (igsc_info
== NULL
)
630 IGS_ERROR("Failed to allocated memory size %d for MFL\n",
631 sizeof(igsc_info_t
));
635 IGS_DEBUG("Allocated memory for IGSC info\n");
637 /* Initialize the IGS global data */
638 bzero(igsc_info
, sizeof(igsc_info_t
));
639 igsc_info
->osh
= osh
;
640 igsc_info
->igs_info
= igs_info
;
641 igsc_info
->grp_mem_intv
= IGMPV2_GRP_MEM_INTV
;
642 igsc_info
->query_intv
= IGMPV2_QUERY_INTV
;
644 /* Fill in the wrapper specific data */
645 igsc_info
->wrapper
.igs_broadcast
= wrapper
->igs_broadcast
;
647 /* Initialize the IGSDB */
648 igsc_sdb_init(igsc_info
);
650 igsc_info
->sdb_lock
= OSL_LOCK_CREATE("SDB Lock");
652 if (igsc_info
->sdb_lock
== NULL
)
654 igsc_sdb_clear(igsc_info
);
655 MFREE(osh
, igsc_info
, sizeof(igsc_info_t
));
659 /* Register IGMP v2 Snooper with EMFL */
660 igsc_info
->snooper
.input_fn
= igsc_input
;
661 igsc_info
->snooper
.emf_enable_fn
= igsc_emf_enabled
;
662 igsc_info
->snooper
.emf_disable_fn
= igsc_emf_disabled
;
664 if (emfc_igmp_snooper_register(inst_id
, &igsc_info
->emf_handle
,
665 &igsc_info
->snooper
) != SUCCESS
)
667 IGS_ERROR("IGMP Snooper couldn't register with EMF\n");
668 igsc_sdb_clear(igsc_info
);
669 OSL_LOCK_DESTROY(igsc_info
->sdb_lock
);
670 MFREE(osh
, igsc_info
, sizeof(igsc_info_t
));
674 /* Initialize router port list head */
675 clist_init_head(&igsc_info
->rtlist_head
);
677 igsc_info
->rtlist_lock
= OSL_LOCK_CREATE("Router List Lock");
679 if (igsc_info
->rtlist_lock
== NULL
)
681 emfc_igmp_snooper_unregister(igsc_info
->emf_handle
);
682 igsc_sdb_clear(igsc_info
);
683 OSL_LOCK_DESTROY(igsc_info
->sdb_lock
);
684 MFREE(osh
, igsc_info
, sizeof(igsc_info_t
));
688 IGS_DEBUG("Initialized IGSDB\n");
694 * Description: This function is called from OS specific module cleanup
695 * routine. This routine primarily stops the group interval
696 * timers and cleans up the IGSDB entries.
699 igsc_exit(igsc_info_t
*igsc_info
)
701 emfc_igmp_snooper_unregister(igsc_info
->emf_handle
);
703 /* Cleanup the IGS router port list entries */
704 igsc_rtlist_clear(igsc_info
);
705 OSL_LOCK_DESTROY(igsc_info
->rtlist_lock
);
707 /* Cleanup the IGSDB */
708 igsc_sdb_clear(igsc_info
);
709 OSL_LOCK_DESTROY(igsc_info
->sdb_lock
);
711 MFREE(igsc_info
->osh
, igsc_info
, sizeof(igsc_info_t
));
713 IGS_DEBUG("Cleaned up IGSL, exiting common code\n");
720 * Description: This function is called to delete the IGSDB
721 * rtport entries on an interface
723 * Input: igsc_info - igsc info pointer
724 * ifp - interface pointer
726 * Return: SUCCESS or FAILURE
729 igsc_interface_rtport_del(igsc_info_t
*igsc_info
, void *ifp
)
731 clist_head_t
*ptr
, *tmp
;
732 igsc_rtlist_t
*rtl_ptr
;
734 OSL_LOCK(igsc_info
->rtlist_lock
);
736 for (ptr
= igsc_info
->rtlist_head
.next
;
737 ptr
!= &igsc_info
->rtlist_head
; ptr
= tmp
)
739 rtl_ptr
= clist_entry(ptr
, igsc_rtlist_t
, list
);
742 if (rtl_ptr
->ifp
== (igsc_rtlist_t
*)ifp
)
744 IGS_DEBUG("Router port entry %p found\n");
745 emfc_rtport_del(igsc_info
->emf_handle
, rtl_ptr
->ifp
);
747 MFREE(igsc_info
->osh
, rtl_ptr
, sizeof(igsc_rtlist_t
));
751 OSL_UNLOCK(igsc_info
->rtlist_lock
);