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* Fixed possible deadlock when booting over the network. Creating the interface

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without having the domain locked seems to be safe AFAICT.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@27839 a95241bf-73f2-0310-859d-f6bbb57e9c96
This commit is contained in:
Axel Dörfler 2008-10-02 09:16:50 +00:00
parent 4787aab961
commit a3513e7b9a
1 changed files with 17 additions and 7 deletions
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24
src/add-ons/kernel/network/stack/domains.cpp
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@ -1,5 +1,5 @@
/*
* Copyright 2006-2007, Haiku, Inc. All Rights Reserved.
* Copyright 2006-2008, Haiku, Inc. All Rights Reserved.
* Distributed under the terms of the MIT License.
*
* Authors:
@ -168,11 +168,21 @@ add_interface_to_domain(net_domain *_domain,
net_interface_private *interface = NULL;
status_t status;
if (find_interface(domain, request.ifr_name) != NULL)
status = B_NAME_IN_USE;
else
if (find_interface(domain, request.ifr_name) == NULL) {
// We must not hold the domain's link when creating the interface:
// this will call get_module() which might want to access a network
// device when booting from network.
locker.Unlock();
status = create_interface(domain, request.ifr_name,
baseName, deviceInterface, &interface);
locker.Lock();
if (find_interface(domain, request.ifr_name) != NULL) {
delete_interface(interface);
status = B_NAME_IN_USE;
}
} else
status = B_NAME_IN_USE;
put_device_interface(deviceInterface);
@ -302,8 +312,8 @@ domain_removed_device_interface(net_device_interface *interface)
status_t
register_domain(int family, const char *name,
struct net_protocol_module_info *module,
struct net_address_module_info *addressModule,
struct net_protocol_module_info *module,
struct net_address_module_info *addressModule,
net_domain **_domain)
{
TRACE(("register_domain(%d, %s)\n", family, name));
@ -342,7 +352,7 @@ unregister_domain(net_domain *_domain)
MutexLocker locker(sDomainLock);
list_remove_item(&sDomains, domain);
net_interface_private *interface = NULL;
while (true) {
interface = (net_interface_private *)list_remove_head_item(&domain->interfaces);