/*
* net/tipc/net.c: TIPC network routing code
- *
+ *
* Copyright (c) 1995-2006, Ericsson AB
* Copyright (c) 2005, Wind River Systems
* All rights reserved.
#include "discover.h"
#include "config.h"
-/*
+/*
* The TIPC locking policy is designed to ensure a very fine locking
* granularity, permitting complete parallel access to individual
- * port and node/link instances. The code consists of three major
+ * port and node/link instances. The code consists of three major
* locking domains, each protected with their own disjunct set of locks.
*
* 1: The routing hierarchy.
- * Comprises the structures 'zone', 'cluster', 'node', 'link'
- * and 'bearer'. The whole hierarchy is protected by a big
- * read/write lock, tipc_net_lock, to enssure that nothing is added
- * or removed while code is accessing any of these structures.
- * This layer must not be called from the two others while they
+ * Comprises the structures 'zone', 'cluster', 'node', 'link'
+ * and 'bearer'. The whole hierarchy is protected by a big
+ * read/write lock, tipc_net_lock, to enssure that nothing is added
+ * or removed while code is accessing any of these structures.
+ * This layer must not be called from the two others while they
* hold any of their own locks.
* Neither must it itself do any upcalls to the other two before
* it has released tipc_net_lock and other protective locks.
*
- * Within the tipc_net_lock domain there are two sub-domains;'node' and
+ * Within the tipc_net_lock domain there are two sub-domains;'node' and
* 'bearer', where local write operations are permitted,
* provided that those are protected by individual spin_locks
- * per instance. Code holding tipc_net_lock(read) and a node spin_lock
+ * per instance. Code holding tipc_net_lock(read) and a node spin_lock
* is permitted to poke around in both the node itself and its
- * subordinate links. I.e, it can update link counters and queues,
- * change link state, send protocol messages, and alter the
- * "active_links" array in the node; but it can _not_ remove a link
+ * subordinate links. I.e, it can update link counters and queues,
+ * change link state, send protocol messages, and alter the
+ * "active_links" array in the node; but it can _not_ remove a link
* or a node from the overall structure.
- * Correspondingly, individual bearers may change status within a
- * tipc_net_lock(read), protected by an individual spin_lock ber bearer
+ * Correspondingly, individual bearers may change status within a
+ * tipc_net_lock(read), protected by an individual spin_lock ber bearer
* instance, but it needs tipc_net_lock(write) to remove/add any bearers.
- *
*
- * 2: The transport level of the protocol.
- * This consists of the structures port, (and its user level
- * representations, such as user_port and tipc_sock), reference and
- * tipc_user (port.c, reg.c, socket.c).
+ *
+ * 2: The transport level of the protocol.
+ * This consists of the structures port, (and its user level
+ * representations, such as user_port and tipc_sock), reference and
+ * tipc_user (port.c, reg.c, socket.c).
*
* This layer has four different locks:
* - The tipc_port spin_lock. This is protecting each port instance
- * from parallel data access and removal. Since we can not place
- * this lock in the port itself, it has been placed in the
+ * from parallel data access and removal. Since we can not place
+ * this lock in the port itself, it has been placed in the
* corresponding reference table entry, which has the same life
- * cycle as the module. This entry is difficult to access from
- * outside the TIPC core, however, so a pointer to the lock has
- * been added in the port instance, -to be used for unlocking
+ * cycle as the module. This entry is difficult to access from
+ * outside the TIPC core, however, so a pointer to the lock has
+ * been added in the port instance, -to be used for unlocking
* only.
- * - A read/write lock to protect the reference table itself (teg.c).
- * (Nobody is using read-only access to this, so it can just as
+ * - A read/write lock to protect the reference table itself (teg.c).
+ * (Nobody is using read-only access to this, so it can just as
* well be changed to a spin_lock)
* - A spin lock to protect the registry of kernel/driver users (reg.c)
- * - A global spin_lock (tipc_port_lock), which only task is to ensure
+ * - A global spin_lock (tipc_port_lock), which only task is to ensure
* consistency where more than one port is involved in an operation,
* i.e., whe a port is part of a linked list of ports.
* There are two such lists; 'port_list', which is used for management,
* and 'wait_list', which is used to queue ports during congestion.
- *
+ *
* 3: The name table (name_table.c, name_distr.c, subscription.c)
- * - There is one big read/write-lock (tipc_nametbl_lock) protecting the
- * overall name table structure. Nothing must be added/removed to
+ * - There is one big read/write-lock (tipc_nametbl_lock) protecting the
+ * overall name table structure. Nothing must be added/removed to
* this structure without holding write access to it.
* - There is one local spin_lock per sub_sequence, which can be seen
* as a sub-domain to the tipc_nametbl_lock domain. It is used only
DEFINE_RWLOCK(tipc_net_lock);
struct network tipc_net = { NULL };
-struct node *tipc_net_select_remote_node(u32 addr, u32 ref)
+struct node *tipc_net_select_remote_node(u32 addr, u32 ref)
{
return tipc_zone_select_remote_node(tipc_net.zones[tipc_zone(addr)], addr, ref);
}
static int net_init(void)
{
- u32 sz = sizeof(struct _zone *) * (tipc_max_zones + 1);
-
memset(&tipc_net, 0, sizeof(tipc_net));
- tipc_net.zones = (struct _zone **)kmalloc(sz, GFP_ATOMIC);
+ tipc_net.zones = kcalloc(tipc_max_zones + 1, sizeof(struct _zone *), GFP_ATOMIC);
if (!tipc_net.zones) {
return -ENOMEM;
}
- memset(tipc_net.zones, 0, sz);
return TIPC_OK;
}
buf_discard(buf);
} else {
msg_dbg(msg, "NET>REJ>:");
- tipc_reject_msg(buf, msg_destport(msg) ?
+ tipc_reject_msg(buf, msg_destport(msg) ?
TIPC_ERR_NO_PORT : TIPC_ERR_NO_NAME);
}
return;
dnode = msg_short(msg) ? tipc_own_addr : msg_destnode(msg);
if (in_scope(dnode, tipc_own_addr)) {
if (msg_isdata(msg)) {
- if (msg_mcast(msg))
+ if (msg_mcast(msg))
tipc_port_recv_mcast(buf, NULL);
else if (msg_destport(msg))
tipc_port_recv_msg(buf);
(res = tipc_bclink_init())) {
return res;
}
- tipc_subscr_stop();
+ tipc_subscr_stop();
tipc_cfg_stop();
tipc_k_signal((Handler)tipc_subscr_start, 0);
tipc_k_signal((Handler)tipc_cfg_init, 0);
{
if (tipc_mode != TIPC_NET_MODE)
return;
- write_lock_bh(&tipc_net_lock);
+ write_lock_bh(&tipc_net_lock);
tipc_bearer_stop();
tipc_mode = TIPC_NODE_MODE;
tipc_bclink_stop();
net_stop();
- write_unlock_bh(&tipc_net_lock);
+ write_unlock_bh(&tipc_net_lock);
info("Left network mode \n");
}
projects / linux-drm-fsl-dcu.git / blobdiff