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sctp: Make the ctl_sock per network namespace 

- Kill sctp_get_ctl_sock, it is useless now.
- Pass struct net where needed so net->sctp.ctl_sock is accessible.

Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
Acked-by: Vlad Yasevich <vyasevich@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Eric W. Biederman 2012-08-06 08:43:06 +00:00 committed by David S. Miller
parent 4db67e8086
commit 2ce9550350
5 changed files with 60 additions and 45 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
include/net/netns/sctp.h
View File

@ -1,7 +1,15 @@
#ifndef __NETNS_SCTP_H__
#define __NETNS_SCTP_H__
struct sock;
struct netns_sctp {
/* 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.
*/
struct sock *ctl_sock;
/* This is the global local address list.
* We actively maintain this complete list of addresses on
* the system by catching address add/delete events.

1
include/net/sctp/sctp.h
View File

@ -114,7 +114,6 @@
/*
* sctp/protocol.c
*/
extern struct sock *sctp_get_ctl_sock(void);
extern int sctp_copy_local_addr_list(struct net *, struct sctp_bind_addr *,
sctp_scope_t, gfp_t gfp,
int flags);

4
net/sctp/input.c
View File

@ -204,7 +204,7 @@ int sctp_rcv(struct sk_buff *skb)
sctp_endpoint_put(ep);
ep = NULL;
}
sk = sctp_get_ctl_sock();
sk = net->sctp.ctl_sock;
ep = sctp_sk(sk)->ep;
sctp_endpoint_hold(ep);
rcvr = &ep->base;
@ -795,7 +795,7 @@ static struct sctp_endpoint *__sctp_rcv_lookup_endpoint(struct net *net,
goto hit;
}
ep = sctp_sk((sctp_get_ctl_sock()))->ep;
ep = sctp_sk(net->sctp.ctl_sock)->ep;
hit:
sctp_endpoint_hold(ep);

47
net/sctp/protocol.c
View File

@ -78,12 +78,6 @@ struct proc_dir_entry *proc_net_sctp;
struct idr sctp_assocs_id;
DEFINE_SPINLOCK(sctp_assocs_id_lock);
/* 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.
*/
static struct sock *sctp_ctl_sock;
static struct sctp_pf *sctp_pf_inet6_specific;
static struct sctp_pf *sctp_pf_inet_specific;
static struct sctp_af *sctp_af_v4_specific;
@ -96,12 +90,6 @@ long sysctl_sctp_mem[3];
int sysctl_sctp_rmem[3];
int sysctl_sctp_wmem[3];
/* Return the address of the control sock. */
struct sock *sctp_get_ctl_sock(void)
{
return sctp_ctl_sock;
}
/* Set up the proc fs entry for the SCTP protocol. */
static __init int sctp_proc_init(void)
{
@ -822,7 +810,7 @@ static int sctp_inetaddr_event(struct notifier_block *this, unsigned long ev,
* Initialize the control inode/socket with a control endpoint data
* structure. This endpoint is reserved exclusively for the OOTB processing.
*/
static int sctp_ctl_sock_init(void)
static int sctp_ctl_sock_init(struct net *net)
{
int err;
sa_family_t family = PF_INET;
@ -830,14 +818,14 @@ static int sctp_ctl_sock_init(void)
if (sctp_get_pf_specific(PF_INET6))
family = PF_INET6;
err = inet_ctl_sock_create(&sctp_ctl_sock, family,
SOCK_SEQPACKET, IPPROTO_SCTP, &init_net);
err = inet_ctl_sock_create(&net->sctp.ctl_sock, family,
SOCK_SEQPACKET, IPPROTO_SCTP, net);
/* If IPv6 socket could not be created, try the IPv4 socket */
if (err < 0 && family == PF_INET6)
err = inet_ctl_sock_create(&sctp_ctl_sock, AF_INET,
err = inet_ctl_sock_create(&net->sctp.ctl_sock, AF_INET,
SOCK_SEQPACKET, IPPROTO_SCTP,
&init_net);
net);
if (err < 0) {
pr_err("Failed to create the SCTP control socket\n");
@ -1196,6 +1184,14 @@ static void sctp_v4_del_protocol(void)
static int sctp_net_init(struct net *net)
{
int status;
/* Initialize the control inode/socket for handling OOTB packets. */
if ((status = sctp_ctl_sock_init(net))) {
pr_err("Failed to initialize the SCTP control sock\n");
goto err_ctl_sock_init;
}
/* Initialize the local address list. */
INIT_LIST_HEAD(&net->sctp.local_addr_list);
spin_lock_init(&net->sctp.local_addr_lock);
@ -1210,6 +1206,9 @@ static int sctp_net_init(struct net *net)
(unsigned long)net);
return 0;
err_ctl_sock_init:
return status;
}
static void sctp_net_exit(struct net *net)
@ -1217,6 +1216,9 @@ static void sctp_net_exit(struct net *net)
/* Free the local address list */
sctp_free_addr_wq(net);
sctp_free_local_addr_list(net);
/* Free the control endpoint. */
inet_ctl_sock_destroy(net->sctp.ctl_sock);
}
static struct pernet_operations sctp_net_ops = {
@ -1438,12 +1440,6 @@ SCTP_STATIC __init int sctp_init(void)
if (status)
goto err_v6_protosw_init;
/* Initialize the control inode/socket for handling OOTB packets. */
if ((status = sctp_ctl_sock_init())) {
pr_err("Failed to initialize the SCTP control sock\n");
goto err_ctl_sock_init;
}
status = register_pernet_subsys(&sctp_net_ops);
if (status)
goto err_register_pernet_subsys;
@ -1465,8 +1461,6 @@ err_v6_add_protocol:
err_add_protocol:
unregister_pernet_subsys(&sctp_net_ops);
err_register_pernet_subsys:
inet_ctl_sock_destroy(sctp_ctl_sock);
err_ctl_sock_init:
sctp_v6_protosw_exit();
err_v6_protosw_init:
sctp_v4_protosw_exit();
@ -1506,9 +1500,6 @@ SCTP_STATIC __exit void sctp_exit(void)
sctp_v6_del_protocol();
sctp_v4_del_protocol();
/* Free the control endpoint. */
inet_ctl_sock_destroy(sctp_ctl_sock);
unregister_pernet_subsys(&sctp_net_ops);
/* Free protosw registrations */

45
net/sctp/sm_statefuns.c
View File

@ -74,7 +74,8 @@ static struct sctp_packet *sctp_abort_pkt_new(const struct sctp_endpoint *ep,
static int sctp_eat_data(const struct sctp_association *asoc,
struct sctp_chunk *chunk,
sctp_cmd_seq_t *commands);
static struct sctp_packet *sctp_ootb_pkt_new(const struct sctp_association *asoc,
static struct sctp_packet *sctp_ootb_pkt_new(struct net *net,
const struct sctp_association *asoc,
const struct sctp_chunk *chunk);
static void sctp_send_stale_cookie_err(const struct sctp_endpoint *ep,
const struct sctp_association *asoc,
@ -301,6 +302,7 @@ sctp_disposition_t sctp_sf_do_5_1B_init(const struct sctp_endpoint *ep,
struct sctp_chunk *err_chunk;
struct sctp_packet *packet;
sctp_unrecognized_param_t *unk_param;
struct net *net;
int len;
/* 6.10 Bundling
@ -318,7 +320,8 @@ sctp_disposition_t sctp_sf_do_5_1B_init(const struct sctp_endpoint *ep,
/* If the packet is an OOTB packet which is temporarily on the
* control endpoint, respond with an ABORT.
*/
if (ep == sctp_sk((sctp_get_ctl_sock()))->ep) {
net = sock_net(ep->base.sk);
if (ep == sctp_sk(net->sctp.ctl_sock)->ep) {
SCTP_INC_STATS(SCTP_MIB_OUTOFBLUES);
return sctp_sf_tabort_8_4_8(ep, asoc, type, arg, commands);
}
@ -646,11 +649,13 @@ sctp_disposition_t sctp_sf_do_5_1D_ce(const struct sctp_endpoint *ep,
int error = 0;
struct sctp_chunk *err_chk_p;
struct sock *sk;
struct net *net;
/* If the packet is an OOTB packet which is temporarily on the
* control endpoint, respond with an ABORT.
*/
if (ep == sctp_sk((sctp_get_ctl_sock()))->ep) {
net = sock_net(ep->base.sk);
if (ep == sctp_sk(net->sctp.ctl_sock)->ep) {
SCTP_INC_STATS(SCTP_MIB_OUTOFBLUES);
return sctp_sf_tabort_8_4_8(ep, asoc, type, arg, commands);
}
@ -1171,7 +1176,7 @@ sctp_disposition_t sctp_sf_backbeat_8_3(const struct sctp_endpoint *ep,
/* Helper function to send out an abort for the restart
* condition.
*/
static int sctp_sf_send_restart_abort(union sctp_addr *ssa,
static int sctp_sf_send_restart_abort(struct net *net, union sctp_addr *ssa,
struct sctp_chunk *init,
sctp_cmd_seq_t *commands)
{
@ -1197,7 +1202,7 @@ static int sctp_sf_send_restart_abort(union sctp_addr *ssa,
errhdr->length = htons(len);
/* Assign to the control socket. */
ep = sctp_sk((sctp_get_ctl_sock()))->ep;
ep = sctp_sk(net->sctp.ctl_sock)->ep;
/* Association is NULL since this may be a restart attack and we
* want to send back the attacker's vtag.
@ -1240,6 +1245,7 @@ static int sctp_sf_check_restart_addrs(const struct sctp_association *new_asoc,
struct sctp_chunk *init,
sctp_cmd_seq_t *commands)
{
struct net *net = sock_net(new_asoc->base.sk);
struct sctp_transport *new_addr;
int ret = 1;
@ -1258,7 +1264,7 @@ static int sctp_sf_check_restart_addrs(const struct sctp_association *new_asoc,
transports) {
if (!list_has_sctp_addr(&asoc->peer.transport_addr_list,
&new_addr->ipaddr)) {
sctp_sf_send_restart_abort(&new_addr->ipaddr, init,
sctp_sf_send_restart_abort(net, &new_addr->ipaddr, init,
commands);
ret = 0;
break;
@ -1650,10 +1656,11 @@ sctp_disposition_t sctp_sf_do_5_2_3_initack(const struct sctp_endpoint *ep,
const sctp_subtype_t type,
void *arg, sctp_cmd_seq_t *commands)
{
struct net *net = sock_net(ep->base.sk);
/* Per the above section, we'll discard the chunk if we have an
* endpoint. If this is an OOTB INIT-ACK, treat it as such.
*/
if (ep == sctp_sk((sctp_get_ctl_sock()))->ep)
if (ep == sctp_sk(net->sctp.ctl_sock)->ep)
return sctp_sf_ootb(ep, asoc, type, arg, commands);
else
return sctp_sf_discard_chunk(ep, asoc, type, arg, commands);
@ -3163,8 +3170,10 @@ static sctp_disposition_t sctp_sf_tabort_8_4_8(const struct sctp_endpoint *ep,
struct sctp_packet *packet = NULL;
struct sctp_chunk *chunk = arg;
struct sctp_chunk *abort;
struct net *net;
packet = sctp_ootb_pkt_new(asoc, chunk);
net = sock_net(ep->base.sk);
packet = sctp_ootb_pkt_new(net, asoc, chunk);
if (packet) {
/* Make an ABORT. The T bit will be set if the asoc
@ -3425,8 +3434,10 @@ static sctp_disposition_t sctp_sf_shut_8_4_5(const struct sctp_endpoint *ep,
struct sctp_packet *packet = NULL;
struct sctp_chunk *chunk = arg;
struct sctp_chunk *shut;
struct net *net;
packet = sctp_ootb_pkt_new(asoc, chunk);
net = sock_net(ep->base.sk);
packet = sctp_ootb_pkt_new(net, asoc, chunk);
if (packet) {
/* Make an SHUTDOWN_COMPLETE.
@ -4262,6 +4273,7 @@ static sctp_disposition_t sctp_sf_abort_violation(
struct sctp_packet *packet = NULL;
struct sctp_chunk *chunk = arg;
struct sctp_chunk *abort = NULL;
struct net *net;
/* SCTP-AUTH, Section 6.3:
* It should be noted that if the receiver wants to tear
@ -4282,6 +4294,7 @@ static sctp_disposition_t sctp_sf_abort_violation(
if (!abort)
goto nomem;
net = sock_net(ep->base.sk);
if (asoc) {
/* Treat INIT-ACK as a special case during COOKIE-WAIT. */
if (chunk->chunk_hdr->type == SCTP_CID_INIT_ACK &&
@ -4319,7 +4332,7 @@ static sctp_disposition_t sctp_sf_abort_violation(
SCTP_DEC_STATS(SCTP_MIB_CURRESTAB);
}
} else {
packet = sctp_ootb_pkt_new(asoc, chunk);
packet = sctp_ootb_pkt_new(net, asoc, chunk);
if (!packet)
goto nomem_pkt;
@ -5825,8 +5838,10 @@ static struct sctp_packet *sctp_abort_pkt_new(const struct sctp_endpoint *ep,
{
struct sctp_packet *packet;
struct sctp_chunk *abort;
struct net *net;
packet = sctp_ootb_pkt_new(asoc, chunk);
net = sock_net(ep->base.sk);
packet = sctp_ootb_pkt_new(net, asoc, chunk);
if (packet) {
/* Make an ABORT.
@ -5858,7 +5873,8 @@ static struct sctp_packet *sctp_abort_pkt_new(const struct sctp_endpoint *ep,
}
/* Allocate a packet for responding in the OOTB conditions. */
static struct sctp_packet *sctp_ootb_pkt_new(const struct sctp_association *asoc,
static struct sctp_packet *sctp_ootb_pkt_new(struct net *net,
const struct sctp_association *asoc,
const struct sctp_chunk *chunk)
{
struct sctp_packet *packet;
@ -5919,7 +5935,7 @@ static struct sctp_packet *sctp_ootb_pkt_new(const struct sctp_association *asoc
* the source address.
*/
sctp_transport_route(transport, (union sctp_addr *)&chunk->dest,
sctp_sk(sctp_get_ctl_sock()));
sctp_sk(net->sctp.ctl_sock));
packet = sctp_packet_init(&transport->packet, transport, sport, dport);
packet = sctp_packet_config(packet, vtag, 0);
@ -5946,7 +5962,8 @@ static void sctp_send_stale_cookie_err(const struct sctp_endpoint *ep,
struct sctp_packet *packet;
if (err_chunk) {
packet = sctp_ootb_pkt_new(asoc, chunk);
struct net *net = sock_net(ep->base.sk);
packet = sctp_ootb_pkt_new(net, asoc, chunk);
if (packet) {
struct sctp_signed_cookie *cookie;