korg/linux
0
0
Fork 0
mirror of https://mirrors.bfsu.edu.cn/git/linux.git synced 2024-11-13 14:24:11 +08:00
Code Issues Packages Projects Releases Wiki Activity

tipc: remove leaving group member from all lists

Browse Source 
A group member going into state LEAVING should never go back to any
other state before it is finally deleted. However, this might happen
if the socket needs to send out a RECLAIM message during this interval.
Since we forget to remove the leaving member from the group's 'active'
or 'pending' list, the member might be selected for reclaiming, change
state to RECLAIMING, and get stuck in this state instead of being
deleted. This might lead to suppression of the expected 'member down'
event to the receiver.

We fix this by removing the member from all lists, except the RB tree,
at the moment it goes into state LEAVING.

Signed-off-by: Jon Maloy <jon.maloy@ericsson.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Jon Maloy 2017-12-18 18:13:34 +01:00 committed by David S. Miller
parent 234833991e
commit 3f42f5fe31
1 changed files with 4 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
net/tipc/group.c
View File

@ -699,6 +699,9 @@ void tipc_group_proto_rcv(struct tipc_group *grp, bool *usr_wakeup,
if (!m)
return;
m->bc_syncpt = msg_grp_bc_syncpt(hdr);
list_del_init(&m->list);
list_del_init(&m->congested);
*usr_wakeup = true;
/* Wait until WITHDRAW event is received */
if (m->state != MBR_LEAVING) {
@ -710,8 +713,6 @@ void tipc_group_proto_rcv(struct tipc_group *grp, bool *usr_wakeup,
ehdr = buf_msg(m->event_msg);
msg_set_grp_bc_seqno(ehdr, m->bc_syncpt);
__skb_queue_tail(inputq, m->event_msg);
*usr_wakeup = true;
list_del_init(&m->congested);
return;
case GRP_ADV_MSG:
if (!m)
@ -863,6 +864,7 @@ void tipc_group_member_evt(struct tipc_group *grp,
msg_set_grp_bc_seqno(hdr, m->bc_rcv_nxt);
__skb_queue_tail(inputq, skb);
}
list_del_init(&m->list);
list_del_init(&m->congested);
}
*sk_rcvbuf = tipc_group_rcvbuf_limit(grp);