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tipc: make tipc broadcast link support net namespace

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TIPC broadcast link is statically established and its relevant states
are maintained with the global variables: "bcbearer", "bclink" and
"bcl". Allowing different namespace to own different broadcast link
instances, these variables must be moved to tipc_net structure and
broadcast link instances would be allocated and initialized when
namespace is created.

Signed-off-by: Ying Xue <ying.xue@windriver.com>
Tested-by: Tero Aho <Tero.Aho@coriant.com>
Reviewed-by: Jon Maloy <jon.maloy@ericsson.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Ying Xue
2015-01-09 15:27:07 +08:00
committed by David S. Miller
parent 7f9f95d9d9
commit 1da465683a
12 changed files with 259 additions and 205 deletions
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97
net/tipc/bcast.h
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@@ -37,23 +37,13 @@
#ifndef _TIPC_BCAST_H
#define _TIPC_BCAST_H
#include "netlink.h"
#include <linux/tipc_config.h>
#include "link.h"
#include "node.h"
#define MAX_NODES 4096
#define WSIZE 32
#define TIPC_BCLINK_RESET 1
/**
* struct tipc_node_map - set of node identifiers
* @count: # of nodes in set
* @map: bitmap of node identifiers that are in the set
*/
struct tipc_node_map {
u32 count;
u32 map[MAX_NODES / WSIZE];
};
#define PLSIZE 32
#define TIPC_BCLINK_RESET 1
#define PLSIZE 32
#define BCBEARER MAX_BEARERS
/**
* struct tipc_port_list - set of node local destination ports
@@ -67,9 +57,64 @@ struct tipc_port_list {
u32 ports[PLSIZE];
};
/**
* struct tipc_bcbearer_pair - a pair of bearers used by broadcast link
* @primary: pointer to primary bearer
* @secondary: pointer to secondary bearer
*
* Bearers must have same priority and same set of reachable destinations
* to be paired.
*/
struct tipc_bcbearer_pair {
struct tipc_bearer *primary;
struct tipc_bearer *secondary;
};
/**
* struct tipc_bcbearer - bearer used by broadcast link
* @bearer: (non-standard) broadcast bearer structure
* @media: (non-standard) broadcast media structure
* @bpairs: array of bearer pairs
* @bpairs_temp: temporary array of bearer pairs used by tipc_bcbearer_sort()
* @remains: temporary node map used by tipc_bcbearer_send()
* @remains_new: temporary node map used tipc_bcbearer_send()
*
* Note: The fields labelled "temporary" are incorporated into the bearer
* to avoid consuming potentially limited stack space through the use of
* large local variables within multicast routines. Concurrent access is
* prevented through use of the spinlock "bclink_lock".
*/
struct tipc_bcbearer {
struct tipc_bearer bearer;
struct tipc_media media;
struct tipc_bcbearer_pair bpairs[MAX_BEARERS];
struct tipc_bcbearer_pair bpairs_temp[TIPC_MAX_LINK_PRI + 1];
struct tipc_node_map remains;
struct tipc_node_map remains_new;
};
/**
* struct tipc_bclink - link used for broadcast messages
* @lock: spinlock governing access to structure
* @link: (non-standard) broadcast link structure
* @node: (non-standard) node structure representing b'cast link's peer node
* @flags: represent bclink states
* @bcast_nodes: map of broadcast-capable nodes
* @retransmit_to: node that most recently requested a retransmit
*
* Handles sequence numbering, fragmentation, bundling, etc.
*/
struct tipc_bclink {
spinlock_t lock;
struct tipc_link link;
struct tipc_node node;
unsigned int flags;
struct tipc_node_map bcast_nodes;
struct tipc_node *retransmit_to;
};
struct tipc_node;
extern const char tipc_bclink_name[];
/**
@@ -86,24 +131,24 @@ void tipc_port_list_free(struct tipc_port_list *pl_ptr);
int tipc_bclink_init(struct net *net);
void tipc_bclink_stop(struct net *net);
void tipc_bclink_set_flags(unsigned int flags);
void tipc_bclink_add_node(u32 addr);
void tipc_bclink_remove_node(u32 addr);
struct tipc_node *tipc_bclink_retransmit_to(void);
void tipc_bclink_set_flags(struct net *tn, unsigned int flags);
void tipc_bclink_add_node(struct net *net, u32 addr);
void tipc_bclink_remove_node(struct net *net, u32 addr);
struct tipc_node *tipc_bclink_retransmit_to(struct net *tn);
void tipc_bclink_acknowledge(struct tipc_node *n_ptr, u32 acked);
void tipc_bclink_rcv(struct net *net, struct sk_buff *buf);
u32 tipc_bclink_get_last_sent(void);
u32 tipc_bclink_get_last_sent(struct net *net);
u32 tipc_bclink_acks_missing(struct tipc_node *n_ptr);
void tipc_bclink_update_link_state(struct net *net, struct tipc_node *n_ptr,
u32 last_sent);
int tipc_bclink_stats(char *stats_buf, const u32 buf_size);
int tipc_bclink_reset_stats(void);
int tipc_bclink_set_queue_limits(u32 limit);
int tipc_bclink_stats(struct net *net, char *stats_buf, const u32 buf_size);
int tipc_bclink_reset_stats(struct net *net);
int tipc_bclink_set_queue_limits(struct net *net, u32 limit);
void tipc_bcbearer_sort(struct net *net, struct tipc_node_map *nm_ptr,
u32 node, bool action);
uint tipc_bclink_get_mtu(void);
int tipc_bclink_xmit(struct net *net, struct sk_buff_head *list);
void tipc_bclink_wakeup_users(struct net *net);
int tipc_nl_add_bc_link(struct tipc_nl_msg *msg);
int tipc_nl_add_bc_link(struct net *net, struct tipc_nl_msg *msg);
#endif