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Commit ebb7e95d authored by Eric W. Biederman's avatar Eric W. Biederman Committed by David S. Miller
Browse files

sctp: Add infrastructure for per net sysctls 



Start with an empty sctp_net_table that will be populated as the various
tunable sysctls are made per net.

Signed-off-by: default avatar"Eric W. Biederman" <ebiederm@xmission.com>
Acked-by: default avatarVlad Yasevich <vyasevich@gmail.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent b01a2407

include/net/netns/sctp.h

+5 −1
Original line number Diff line number Diff line
@@ -4,6 +4,7 @@ 
struct sock;

struct proc_dir_entry;

struct sctp_mib;

struct ctl_table_header;



struct netns_sctp {

	DEFINE_SNMP_STAT(struct sctp_mib, sctp_statistics);
@@ -11,7 +12,9 @@ struct netns_sctp { 
#ifdef CONFIG_PROC_FS

	struct proc_dir_entry *proc_net_sctp;

#endif



#ifdef CONFIG_SYSCTL

	struct ctl_table_header *sysctl_header;

#endif

	/* This is the global socket data structure used for responding to

	 * the Out-of-the-blue (OOTB) packets.  A control sock will be created

	 * for this socket at the initialization time.
@@ -32,6 +35,7 @@ struct netns_sctp { 


	/* Lock that protects the local_addr_list writers */

	spinlock_t local_addr_lock;



};



#endif /* __NETNS_SCTP_H__ */

include/net/sctp/sctp.h

+4 −0
Original line number Diff line number Diff line
@@ -375,9 +375,13 @@ static inline void sctp_dbg_objcnt_exit(struct net *) { return; } 
#if defined CONFIG_SYSCTL

void sctp_sysctl_register(void);

void sctp_sysctl_unregister(void);

int sctp_sysctl_net_register(struct net *net);

void sctp_sysctl_net_unregister(struct net *net);

#else

static inline void sctp_sysctl_register(void) { return; }

static inline void sctp_sysctl_unregister(void) { return; }

static inline int sctp_sysctl_net_register(struct net *net) { return 0; }

static inline void sctp_sysctl_net_unregister(struct net *net) { return; }

#endif



/* Size of Supported Address Parameter for 'x' address types. */

net/sctp/protocol.c

+7 −0
Original line number Diff line number Diff line
@@ -1169,6 +1169,10 @@ static int sctp_net_init(struct net *net) 
{

	int status;



	status = sctp_sysctl_net_register(net);

	if (status)

		goto err_sysctl_register;



	/* Allocate and initialise sctp mibs.  */

	status = init_sctp_mibs(net);

	if (status)
@@ -1208,6 +1212,8 @@ err_ctl_sock_init: 
err_init_proc:

	cleanup_sctp_mibs(net);

err_init_mibs:

	sctp_sysctl_net_unregister(net);

err_sysctl_register:

	return status;

}
@@ -1224,6 +1230,7 @@ static void sctp_net_exit(struct net *net) 


	sctp_proc_exit(net);

	cleanup_sctp_mibs(net);

	sctp_sysctl_net_unregister(net);

}



static struct pernet_operations sctp_net_ops = {

net/sctp/sysctl.c

+21 −0
Original line number Diff line number Diff line
@@ -284,6 +284,27 @@ static ctl_table sctp_table[] = { 
	{ /* sentinel */ }

};



static ctl_table sctp_net_table[] = {

	{ /* sentinel */ }

};



int sctp_sysctl_net_register(struct net *net)

{

	struct ctl_table *table;



	table = kmemdup(sctp_net_table, sizeof(sctp_net_table), GFP_KERNEL);

	if (!table)

		return -ENOMEM;



	net->sctp.sysctl_header = register_net_sysctl(net, "net/sctp", table);

	return 0;

}



void sctp_sysctl_net_unregister(struct net *net)

{

	unregister_net_sysctl_table(net->sctp.sysctl_header);

}



static struct ctl_table_header * sctp_sysctl_header;



/* Sysctl registration.  */