[PATCH net-next 2/7] sctp: Push struct net down to sctp_chunk_event_lookup

From: Eric W. Biederman
Date: Tue Aug 07 2012 - 13:25:29 EST


This trickles up through sctp_sm_lookup_event up to sctp_do_sm
and up further into sctp_primitiv_NAME before the code reaches
places where struct net can be reliably found.

Signed-off-by: "Eric W. Biederman" <ebiederm@xxxxxxxxxxxx>
---
include/net/sctp/sctp.h | 12 ++++++------
include/net/sctp/sm.h | 5 +++--
net/sctp/associola.c | 5 +++--
net/sctp/endpointola.c | 4 +++-
net/sctp/input.c | 4 +++-
net/sctp/primitive.c | 4 ++--
net/sctp/sm_sideeffect.c | 24 ++++++++++++++++--------
net/sctp/sm_statetable.c | 11 +++++++----
net/sctp/socket.c | 27 +++++++++++++++++----------
9 files changed, 60 insertions(+), 36 deletions(-)

diff --git a/include/net/sctp/sctp.h b/include/net/sctp/sctp.h
index 15037e7..ef4ca25 100644
--- a/include/net/sctp/sctp.h
+++ b/include/net/sctp/sctp.h
@@ -139,12 +139,12 @@ extern int sctp_asconf_mgmt(struct sctp_sock *, struct sctp_sockaddr_entry *);
/*
* sctp/primitive.c
*/
-int sctp_primitive_ASSOCIATE(struct sctp_association *, void *arg);
-int sctp_primitive_SHUTDOWN(struct sctp_association *, void *arg);
-int sctp_primitive_ABORT(struct sctp_association *, void *arg);
-int sctp_primitive_SEND(struct sctp_association *, void *arg);
-int sctp_primitive_REQUESTHEARTBEAT(struct sctp_association *, void *arg);
-int sctp_primitive_ASCONF(struct sctp_association *, void *arg);
+int sctp_primitive_ASSOCIATE(struct net *, struct sctp_association *, void *arg);
+int sctp_primitive_SHUTDOWN(struct net *, struct sctp_association *, void *arg);
+int sctp_primitive_ABORT(struct net *, struct sctp_association *, void *arg);
+int sctp_primitive_SEND(struct net *, struct sctp_association *, void *arg);
+int sctp_primitive_REQUESTHEARTBEAT(struct net *, struct sctp_association *, void *arg);
+int sctp_primitive_ASCONF(struct net *, struct sctp_association *, void *arg);

/*
* sctp/input.c
diff --git a/include/net/sctp/sm.h b/include/net/sctp/sm.h
index 9148632..bcef130 100644
--- a/include/net/sctp/sm.h
+++ b/include/net/sctp/sm.h
@@ -178,7 +178,8 @@ sctp_state_fn_t sctp_sf_autoclose_timer_expire;

/* Prototypes for utility support functions. */
__u8 sctp_get_chunk_type(struct sctp_chunk *chunk);
-const sctp_sm_table_entry_t *sctp_sm_lookup_event(sctp_event_t,
+const sctp_sm_table_entry_t *sctp_sm_lookup_event(struct net *,
+ sctp_event_t,
sctp_state_t,
sctp_subtype_t);
int sctp_chunk_iif(const struct sctp_chunk *);
@@ -268,7 +269,7 @@ void sctp_chunk_assign_ssn(struct sctp_chunk *);

/* Prototypes for statetable processing. */

-int sctp_do_sm(sctp_event_t event_type, sctp_subtype_t subtype,
+int sctp_do_sm(struct net *net, sctp_event_t event_type, sctp_subtype_t subtype,
sctp_state_t state,
struct sctp_endpoint *,
struct sctp_association *asoc,
diff --git a/net/sctp/associola.c b/net/sctp/associola.c
index 8a1f27a..6bcbeca 100644
--- a/net/sctp/associola.c
+++ b/net/sctp/associola.c
@@ -1118,6 +1118,7 @@ static void sctp_assoc_bh_rcv(struct work_struct *work)
struct sctp_association *asoc =
container_of(work, struct sctp_association,
base.inqueue.immediate);
+ struct net *net = sock_net(asoc->base.sk);
struct sctp_endpoint *ep;
struct sctp_chunk *chunk;
struct sctp_inq *inqueue;
@@ -1150,13 +1151,13 @@ static void sctp_assoc_bh_rcv(struct work_struct *work)
if (sctp_chunk_is_data(chunk))
asoc->peer.last_data_from = chunk->transport;
else
- SCTP_INC_STATS(sock_net(asoc->base.sk), SCTP_MIB_INCTRLCHUNKS);
+ SCTP_INC_STATS(net, SCTP_MIB_INCTRLCHUNKS);

if (chunk->transport)
chunk->transport->last_time_heard = jiffies;

/* Run through the state machine. */
- error = sctp_do_sm(SCTP_EVENT_T_CHUNK, subtype,
+ error = sctp_do_sm(net, SCTP_EVENT_T_CHUNK, subtype,
state, ep, asoc, chunk, GFP_ATOMIC);

/* Check to see if the association is freed in response to
diff --git a/net/sctp/endpointola.c b/net/sctp/endpointola.c
index 3edca80..8315792 100644
--- a/net/sctp/endpointola.c
+++ b/net/sctp/endpointola.c
@@ -413,6 +413,7 @@ static void sctp_endpoint_bh_rcv(struct work_struct *work)
base.inqueue.immediate);
struct sctp_association *asoc;
struct sock *sk;
+ struct net *net;
struct sctp_transport *transport;
struct sctp_chunk *chunk;
struct sctp_inq *inqueue;
@@ -427,6 +428,7 @@ static void sctp_endpoint_bh_rcv(struct work_struct *work)
asoc = NULL;
inqueue = &ep->base.inqueue;
sk = ep->base.sk;
+ net = sock_net(sk);

while (NULL != (chunk = sctp_inq_pop(inqueue))) {
subtype = SCTP_ST_CHUNK(chunk->chunk_hdr->type);
@@ -483,7 +485,7 @@ normal:
if (chunk->transport)
chunk->transport->last_time_heard = jiffies;

- error = sctp_do_sm(SCTP_EVENT_T_CHUNK, subtype, state,
+ error = sctp_do_sm(net, SCTP_EVENT_T_CHUNK, subtype, state,
ep, asoc, chunk, GFP_ATOMIC);

if (error && chunk)
diff --git a/net/sctp/input.c b/net/sctp/input.c
index 5308301..a2ceb70 100644
--- a/net/sctp/input.c
+++ b/net/sctp/input.c
@@ -466,11 +466,13 @@ void sctp_icmp_proto_unreachable(struct sock *sk,
}

} else {
+ struct net *net = sock_net(sk);
+
if (timer_pending(&t->proto_unreach_timer) &&
del_timer(&t->proto_unreach_timer))
sctp_association_put(asoc);

- sctp_do_sm(SCTP_EVENT_T_OTHER,
+ sctp_do_sm(net, SCTP_EVENT_T_OTHER,
SCTP_ST_OTHER(SCTP_EVENT_ICMP_PROTO_UNREACH),
asoc->state, asoc->ep, asoc, t,
GFP_ATOMIC);
diff --git a/net/sctp/primitive.c b/net/sctp/primitive.c
index 534c7ea..794bb14 100644
--- a/net/sctp/primitive.c
+++ b/net/sctp/primitive.c
@@ -57,7 +57,7 @@

#define DECLARE_PRIMITIVE(name) \
/* This is called in the code as sctp_primitive_ ## name. */ \
-int sctp_primitive_ ## name(struct sctp_association *asoc, \
+int sctp_primitive_ ## name(struct net *net, struct sctp_association *asoc, \
void *arg) { \
int error = 0; \
sctp_event_t event_type; sctp_subtype_t subtype; \
@@ -69,7 +69,7 @@ int sctp_primitive_ ## name(struct sctp_association *asoc, \
state = asoc ? asoc->state : SCTP_STATE_CLOSED; \
ep = asoc ? asoc->ep : NULL; \
\
- error = sctp_do_sm(event_type, subtype, state, ep, asoc, \
+ error = sctp_do_sm(net, event_type, subtype, state, ep, asoc, \
arg, GFP_KERNEL); \
return error; \
}
diff --git a/net/sctp/sm_sideeffect.c b/net/sctp/sm_sideeffect.c
index fe99628..02c4c1c 100644
--- a/net/sctp/sm_sideeffect.c
+++ b/net/sctp/sm_sideeffect.c
@@ -251,6 +251,7 @@ void sctp_generate_t3_rtx_event(unsigned long peer)
int error;
struct sctp_transport *transport = (struct sctp_transport *) peer;
struct sctp_association *asoc = transport->asoc;
+ struct net *net = sock_net(asoc->base.sk);

/* Check whether a task is in the sock. */

@@ -271,7 +272,7 @@ void sctp_generate_t3_rtx_event(unsigned long peer)
goto out_unlock;

/* Run through the state machine. */
- error = sctp_do_sm(SCTP_EVENT_T_TIMEOUT,
+ error = sctp_do_sm(net, SCTP_EVENT_T_TIMEOUT,
SCTP_ST_TIMEOUT(SCTP_EVENT_TIMEOUT_T3_RTX),
asoc->state,
asoc->ep, asoc,
@@ -291,6 +292,7 @@ out_unlock:
static void sctp_generate_timeout_event(struct sctp_association *asoc,
sctp_event_timeout_t timeout_type)
{
+ struct net *net = sock_net(asoc->base.sk);
int error = 0;

sctp_bh_lock_sock(asoc->base.sk);
@@ -312,7 +314,7 @@ static void sctp_generate_timeout_event(struct sctp_association *asoc,
goto out_unlock;

/* Run through the state machine. */
- error = sctp_do_sm(SCTP_EVENT_T_TIMEOUT,
+ error = sctp_do_sm(net, SCTP_EVENT_T_TIMEOUT,
SCTP_ST_TIMEOUT(timeout_type),
asoc->state, asoc->ep, asoc,
(void *)timeout_type, GFP_ATOMIC);
@@ -371,6 +373,7 @@ void sctp_generate_heartbeat_event(unsigned long data)
int error = 0;
struct sctp_transport *transport = (struct sctp_transport *) data;
struct sctp_association *asoc = transport->asoc;
+ struct net *net = sock_net(asoc->base.sk);

sctp_bh_lock_sock(asoc->base.sk);
if (sock_owned_by_user(asoc->base.sk)) {
@@ -388,7 +391,7 @@ void sctp_generate_heartbeat_event(unsigned long data)
if (transport->dead)
goto out_unlock;

- error = sctp_do_sm(SCTP_EVENT_T_TIMEOUT,
+ error = sctp_do_sm(net, SCTP_EVENT_T_TIMEOUT,
SCTP_ST_TIMEOUT(SCTP_EVENT_TIMEOUT_HEARTBEAT),
asoc->state, asoc->ep, asoc,
transport, GFP_ATOMIC);
@@ -408,6 +411,7 @@ void sctp_generate_proto_unreach_event(unsigned long data)
{
struct sctp_transport *transport = (struct sctp_transport *) data;
struct sctp_association *asoc = transport->asoc;
+ struct net *net = sock_net(asoc->base.sk);

sctp_bh_lock_sock(asoc->base.sk);
if (sock_owned_by_user(asoc->base.sk)) {
@@ -426,7 +430,7 @@ void sctp_generate_proto_unreach_event(unsigned long data)
if (asoc->base.dead)
goto out_unlock;

- sctp_do_sm(SCTP_EVENT_T_OTHER,
+ sctp_do_sm(net, SCTP_EVENT_T_OTHER,
SCTP_ST_OTHER(SCTP_EVENT_ICMP_PROTO_UNREACH),
asoc->state, asoc->ep, asoc, transport, GFP_ATOMIC);

@@ -753,8 +757,10 @@ static int sctp_cmd_process_sack(sctp_cmd_seq_t *cmds,
int err = 0;

if (sctp_outq_sack(&asoc->outqueue, sackh)) {
+ struct net *net = sock_net(asoc->base.sk);
+
/* There are no more TSNs awaiting SACK. */
- err = sctp_do_sm(SCTP_EVENT_T_OTHER,
+ err = sctp_do_sm(net, SCTP_EVENT_T_OTHER,
SCTP_ST_OTHER(SCTP_EVENT_NO_PENDING_TSN),
asoc->state, asoc->ep, asoc, NULL,
GFP_ATOMIC);
@@ -1042,6 +1048,8 @@ static int sctp_cmd_send_msg(struct sctp_association *asoc,
*/
static void sctp_cmd_send_asconf(struct sctp_association *asoc)
{
+ struct net *net = sock_net(asoc->base.sk);
+
/* Send the next asconf chunk from the addip chunk
* queue.
*/
@@ -1053,7 +1061,7 @@ static void sctp_cmd_send_asconf(struct sctp_association *asoc)

/* Hold the chunk until an ASCONF_ACK is received. */
sctp_chunk_hold(asconf);
- if (sctp_primitive_ASCONF(asoc, asconf))
+ if (sctp_primitive_ASCONF(net, asoc, asconf))
sctp_chunk_free(asconf);
else
asoc->addip_last_asconf = asconf;
@@ -1089,7 +1097,7 @@ static void sctp_cmd_send_asconf(struct sctp_association *asoc)
* If you want to understand all of lksctp, this is a
* good place to start.
*/
-int sctp_do_sm(sctp_event_t event_type, sctp_subtype_t subtype,
+int sctp_do_sm(struct net *net, sctp_event_t event_type, sctp_subtype_t subtype,
sctp_state_t state,
struct sctp_endpoint *ep,
struct sctp_association *asoc,
@@ -1110,7 +1118,7 @@ int sctp_do_sm(sctp_event_t event_type, sctp_subtype_t subtype,
/* Look up the state function, run it, and then process the
* side effects. These three steps are the heart of lksctp.
*/
- state_fn = sctp_sm_lookup_event(event_type, state, subtype);
+ state_fn = sctp_sm_lookup_event(net, event_type, state, subtype);

sctp_init_cmd_seq(&commands);

diff --git a/net/sctp/sm_statetable.c b/net/sctp/sm_statetable.c
index 7c211a7..4a029d7 100644
--- a/net/sctp/sm_statetable.c
+++ b/net/sctp/sm_statetable.c
@@ -59,7 +59,8 @@ other_event_table[SCTP_NUM_OTHER_TYPES][SCTP_STATE_NUM_STATES];
static const sctp_sm_table_entry_t
timeout_event_table[SCTP_NUM_TIMEOUT_TYPES][SCTP_STATE_NUM_STATES];

-static const sctp_sm_table_entry_t *sctp_chunk_event_lookup(sctp_cid_t cid,
+static const sctp_sm_table_entry_t *sctp_chunk_event_lookup(struct net *net,
+ sctp_cid_t cid,
sctp_state_t state);


@@ -82,13 +83,14 @@ static const sctp_sm_table_entry_t bug = {
rtn; \
})

-const sctp_sm_table_entry_t *sctp_sm_lookup_event(sctp_event_t event_type,
+const sctp_sm_table_entry_t *sctp_sm_lookup_event(struct net *net,
+ sctp_event_t event_type,
sctp_state_t state,
sctp_subtype_t event_subtype)
{
switch (event_type) {
case SCTP_EVENT_T_CHUNK:
- return sctp_chunk_event_lookup(event_subtype.chunk, state);
+ return sctp_chunk_event_lookup(net, event_subtype.chunk, state);
case SCTP_EVENT_T_TIMEOUT:
return DO_LOOKUP(SCTP_EVENT_TIMEOUT_MAX, timeout,
timeout_event_table);
@@ -906,7 +908,8 @@ static const sctp_sm_table_entry_t timeout_event_table[SCTP_NUM_TIMEOUT_TYPES][S
TYPE_SCTP_EVENT_TIMEOUT_AUTOCLOSE,
};

-static const sctp_sm_table_entry_t *sctp_chunk_event_lookup(sctp_cid_t cid,
+static const sctp_sm_table_entry_t *sctp_chunk_event_lookup(struct net *net,
+ sctp_cid_t cid,
sctp_state_t state)
{
if (state > SCTP_STATE_MAX)
diff --git a/net/sctp/socket.c b/net/sctp/socket.c
index 5b6dd0e..a6a4226 100644
--- a/net/sctp/socket.c
+++ b/net/sctp/socket.c
@@ -427,6 +427,7 @@ SCTP_STATIC int sctp_do_bind(struct sock *sk, union sctp_addr *addr, int len)
static int sctp_send_asconf(struct sctp_association *asoc,
struct sctp_chunk *chunk)
{
+ struct net *net = sock_net(asoc->base.sk);
int retval = 0;

/* If there is an outstanding ASCONF chunk, queue it for later
@@ -439,7 +440,7 @@ static int sctp_send_asconf(struct sctp_association *asoc,

/* Hold the chunk until an ASCONF_ACK is received. */
sctp_chunk_hold(chunk);
- retval = sctp_primitive_ASCONF(asoc, chunk);
+ retval = sctp_primitive_ASCONF(net, asoc, chunk);
if (retval)
sctp_chunk_free(chunk);
else
@@ -1050,6 +1051,7 @@ static int __sctp_connect(struct sock* sk,
int addrs_size,
sctp_assoc_t *assoc_id)
{
+ struct net *net = sock_net(sk);
struct sctp_sock *sp;
struct sctp_endpoint *ep;
struct sctp_association *asoc = NULL;
@@ -1200,7 +1202,7 @@ static int __sctp_connect(struct sock* sk,
goto out_free;
}

- err = sctp_primitive_ASSOCIATE(asoc, NULL);
+ err = sctp_primitive_ASSOCIATE(net, asoc, NULL);
if (err < 0) {
goto out_free;
}
@@ -1458,6 +1460,7 @@ SCTP_STATIC int sctp_getsockopt_connectx3(struct sock* sk, int len,
*/
SCTP_STATIC void sctp_close(struct sock *sk, long timeout)
{
+ struct net *net = sock_net(sk);
struct sctp_endpoint *ep;
struct sctp_association *asoc;
struct list_head *pos, *temp;
@@ -1499,9 +1502,9 @@ SCTP_STATIC void sctp_close(struct sock *sk, long timeout)

chunk = sctp_make_abort_user(asoc, NULL, 0);
if (chunk)
- sctp_primitive_ABORT(asoc, chunk);
+ sctp_primitive_ABORT(net, asoc, chunk);
} else
- sctp_primitive_SHUTDOWN(asoc, NULL);
+ sctp_primitive_SHUTDOWN(net, asoc, NULL);
}

/* On a TCP-style socket, block for at most linger_time if set. */
@@ -1569,6 +1572,7 @@ SCTP_STATIC int sctp_msghdr_parse(const struct msghdr *, sctp_cmsgs_t *);
SCTP_STATIC int sctp_sendmsg(struct kiocb *iocb, struct sock *sk,
struct msghdr *msg, size_t msg_len)
{
+ struct net *net = sock_net(sk);
struct sctp_sock *sp;
struct sctp_endpoint *ep;
struct sctp_association *new_asoc=NULL, *asoc=NULL;
@@ -1714,7 +1718,7 @@ SCTP_STATIC int sctp_sendmsg(struct kiocb *iocb, struct sock *sk,
if (sinfo_flags & SCTP_EOF) {
SCTP_DEBUG_PRINTK("Shutting down association: %p\n",
asoc);
- sctp_primitive_SHUTDOWN(asoc, NULL);
+ sctp_primitive_SHUTDOWN(net, asoc, NULL);
err = 0;
goto out_unlock;
}
@@ -1727,7 +1731,7 @@ SCTP_STATIC int sctp_sendmsg(struct kiocb *iocb, struct sock *sk,
}

SCTP_DEBUG_PRINTK("Aborting association: %p\n", asoc);
- sctp_primitive_ABORT(asoc, chunk);
+ sctp_primitive_ABORT(net, asoc, chunk);
err = 0;
goto out_unlock;
}
@@ -1900,7 +1904,7 @@ SCTP_STATIC int sctp_sendmsg(struct kiocb *iocb, struct sock *sk,

/* Auto-connect, if we aren't connected already. */
if (sctp_state(asoc, CLOSED)) {
- err = sctp_primitive_ASSOCIATE(asoc, NULL);
+ err = sctp_primitive_ASSOCIATE(net, asoc, NULL);
if (err < 0)
goto out_free;
SCTP_DEBUG_PRINTK("We associated primitively.\n");
@@ -1928,7 +1932,7 @@ SCTP_STATIC int sctp_sendmsg(struct kiocb *iocb, struct sock *sk,
* works that way today. Keep it that way or this
* breaks.
*/
- err = sctp_primitive_SEND(asoc, datamsg);
+ err = sctp_primitive_SEND(net, asoc, datamsg);
/* Did the lower layer accept the chunk? */
if (err)
sctp_datamsg_free(datamsg);
@@ -2320,7 +2324,9 @@ static int sctp_apply_peer_addr_params(struct sctp_paddrparams *params,
int error;

if (params->spp_flags & SPP_HB_DEMAND && trans) {
- error = sctp_primitive_REQUESTHEARTBEAT (trans->asoc, trans);
+ struct net *net = sock_net(trans->asoc->base.sk);
+
+ error = sctp_primitive_REQUESTHEARTBEAT(net, trans->asoc, trans);
if (error)
return error;
}
@@ -4011,6 +4017,7 @@ SCTP_STATIC void sctp_destroy_sock(struct sock *sk)
*/
SCTP_STATIC void sctp_shutdown(struct sock *sk, int how)
{
+ struct net *net = sock_net(sk);
struct sctp_endpoint *ep;
struct sctp_association *asoc;

@@ -4022,7 +4029,7 @@ SCTP_STATIC void sctp_shutdown(struct sock *sk, int how)
if (!list_empty(&ep->asocs)) {
asoc = list_entry(ep->asocs.next,
struct sctp_association, asocs);
- sctp_primitive_SHUTDOWN(asoc, NULL);
+ sctp_primitive_SHUTDOWN(net, asoc, NULL);
}
}
}
--
1.7.5.4

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