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rxrpc: Split the receive code

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Split the code that handles packet reception in softirq mode as a prelude
to moving all the packet processing beyond routing to the appropriate call
and setting up of a new call out into process context.

Signed-off-by: David Howells <dhowells@redhat.com>
cc: Marc Dionne <marc.dionne@auristor.com>
cc: linux-afs@lists.infradead.org
This commit is contained in:
David Howells 2020-01-23 13:01:33 +00:00
parent 3cec055c56
commit 96b2d69b43
4 changed files with 384 additions and 366 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
net/rxrpc/Makefile
View File

@ -16,6 +16,7 @@ rxrpc-y := \
conn_service.o \
input.o \
insecure.o \
io_thread.o \
key.o \
local_event.o \
local_object.o \

7
net/rxrpc/ar-internal.h
View File

@ -946,6 +946,13 @@ void rxrpc_unpublish_service_conn(struct rxrpc_connection *);
/*
* input.c
*/
void rxrpc_input_call_packet(struct rxrpc_call *, struct sk_buff *);
void rxrpc_input_implicit_end_call(struct rxrpc_sock *, struct rxrpc_connection *,
struct rxrpc_call *);
/*
* io_thread.c
*/
int rxrpc_input_packet(struct sock *, struct sk_buff *);
/*

372
net/rxrpc/input.c
View File

@ -1,7 +1,7 @@
// SPDX-License-Identifier: GPL-2.0-or-later
/* RxRPC packet reception
/* Processing of received RxRPC packets
*
* Copyright (C) 2007, 2016 Red Hat, Inc. All Rights Reserved.
* Copyright (C) 2020 Red Hat, Inc. All Rights Reserved.
* Written by David Howells (dhowells@redhat.com)
*/
@ -1029,7 +1029,7 @@ static void rxrpc_input_abort(struct rxrpc_call *call, struct sk_buff *skb)
/*
* Process an incoming call packet.
*/
static void rxrpc_input_call_packet(struct rxrpc_call *call,
void rxrpc_input_call_packet(struct rxrpc_call *call,
struct sk_buff *skb)
{
struct rxrpc_skb_priv *sp = rxrpc_skb(skb);
@ -1086,9 +1086,9 @@ no_free:
*
* TODO: If callNumber > call_id + 1, renegotiate security.
*/
static void rxrpc_input_implicit_end_call(struct rxrpc_sock *rx,
struct rxrpc_connection *conn,
struct rxrpc_call *call)
void rxrpc_input_implicit_end_call(struct rxrpc_sock *rx,
struct rxrpc_connection *conn,
struct rxrpc_call *call)
{
switch (READ_ONCE(call->state)) {
case RXRPC_CALL_SERVER_AWAIT_ACK:
@ -1109,363 +1109,3 @@ static void rxrpc_input_implicit_end_call(struct rxrpc_sock *rx,
__rxrpc_disconnect_call(conn, call);
spin_unlock(&rx->incoming_lock);
}
/*
* post connection-level events to the connection
* - this includes challenges, responses, some aborts and call terminal packet
* retransmission.
*/
static void rxrpc_post_packet_to_conn(struct rxrpc_connection *conn,
struct sk_buff *skb)
{
_enter("%p,%p", conn, skb);
skb_queue_tail(&conn->rx_queue, skb);
rxrpc_queue_conn(conn, rxrpc_conn_queue_rx_work);
}
/*
* post endpoint-level events to the local endpoint
* - this includes debug and version messages
*/
static void rxrpc_post_packet_to_local(struct rxrpc_local *local,
struct sk_buff *skb)
{
_enter("%p,%p", local, skb);
if (rxrpc_get_local_maybe(local, rxrpc_local_get_queue)) {
skb_queue_tail(&local->event_queue, skb);
rxrpc_queue_local(local);
} else {
rxrpc_free_skb(skb, rxrpc_skb_put_input);
}
}
/*
* put a packet up for transport-level abort
*/
static void rxrpc_reject_packet(struct rxrpc_local *local, struct sk_buff *skb)
{
if (rxrpc_get_local_maybe(local, rxrpc_local_get_queue)) {
skb_queue_tail(&local->reject_queue, skb);
rxrpc_queue_local(local);
} else {
rxrpc_free_skb(skb, rxrpc_skb_put_input);
}
}
/*
* Extract the wire header from a packet and translate the byte order.
*/
static noinline
int rxrpc_extract_header(struct rxrpc_skb_priv *sp, struct sk_buff *skb)
{
struct rxrpc_wire_header whdr;
/* dig out the RxRPC connection details */
if (skb_copy_bits(skb, 0, &whdr, sizeof(whdr)) < 0) {
trace_rxrpc_rx_eproto(NULL, sp->hdr.serial,
tracepoint_string("bad_hdr"));
return -EBADMSG;
}
memset(sp, 0, sizeof(*sp));
sp->hdr.epoch = ntohl(whdr.epoch);
sp->hdr.cid = ntohl(whdr.cid);
sp->hdr.callNumber = ntohl(whdr.callNumber);
sp->hdr.seq = ntohl(whdr.seq);
sp->hdr.serial = ntohl(whdr.serial);
sp->hdr.flags = whdr.flags;
sp->hdr.type = whdr.type;
sp->hdr.userStatus = whdr.userStatus;
sp->hdr.securityIndex = whdr.securityIndex;
sp->hdr._rsvd = ntohs(whdr._rsvd);
sp->hdr.serviceId = ntohs(whdr.serviceId);
return 0;
}
/*
* Extract the abort code from an ABORT packet and stash it in skb->priority.
*/
static bool rxrpc_extract_abort(struct sk_buff *skb)
{
__be32 wtmp;
if (skb_copy_bits(skb, sizeof(struct rxrpc_wire_header),
&wtmp, sizeof(wtmp)) < 0)
return false;
skb->priority = ntohl(wtmp);
return true;
}
/*
* handle data received on the local endpoint
* - may be called in interrupt context
*
* [!] Note that as this is called from the encap_rcv hook, the socket is not
* held locked by the caller and nothing prevents sk_user_data on the UDP from
* being cleared in the middle of processing this function.
*
* Called with the RCU read lock held from the IP layer via UDP.
*/
int rxrpc_input_packet(struct sock *udp_sk, struct sk_buff *skb)
{
struct rxrpc_local *local = rcu_dereference_sk_user_data(udp_sk);
struct rxrpc_connection *conn;
struct rxrpc_channel *chan;
struct rxrpc_call *call = NULL;
struct rxrpc_skb_priv *sp;
struct rxrpc_peer *peer = NULL;
struct rxrpc_sock *rx = NULL;
unsigned int channel;
_enter("%p", udp_sk);
if (unlikely(!local)) {
kfree_skb(skb);
return 0;
}
if (skb->tstamp == 0)
skb->tstamp = ktime_get_real();
rxrpc_new_skb(skb, rxrpc_skb_new_encap_rcv);
skb_pull(skb, sizeof(struct udphdr));
/* The UDP protocol already released all skb resources;
* we are free to add our own data there.
*/
sp = rxrpc_skb(skb);
/* dig out the RxRPC connection details */
if (rxrpc_extract_header(sp, skb) < 0)
goto bad_message;
if (IS_ENABLED(CONFIG_AF_RXRPC_INJECT_LOSS)) {
static int lose;
if ((lose++ & 7) == 7) {
trace_rxrpc_rx_lose(sp);
rxrpc_free_skb(skb, rxrpc_skb_put_lose);
return 0;
}
}
if (skb->tstamp == 0)
skb->tstamp = ktime_get_real();
trace_rxrpc_rx_packet(sp);
switch (sp->hdr.type) {
case RXRPC_PACKET_TYPE_VERSION:
if (rxrpc_to_client(sp))
goto discard;
rxrpc_post_packet_to_local(local, skb);
goto out;
case RXRPC_PACKET_TYPE_BUSY:
if (rxrpc_to_server(sp))
goto discard;
fallthrough;
case RXRPC_PACKET_TYPE_ACK:
case RXRPC_PACKET_TYPE_ACKALL:
if (sp->hdr.callNumber == 0)
goto bad_message;
break;
case RXRPC_PACKET_TYPE_ABORT:
if (!rxrpc_extract_abort(skb))
return true; /* Just discard if malformed */
break;
case RXRPC_PACKET_TYPE_DATA:
if (sp->hdr.callNumber == 0 ||
sp->hdr.seq == 0)
goto bad_message;
/* Unshare the packet so that it can be modified for in-place
* decryption.
*/
if (sp->hdr.securityIndex != 0) {
struct sk_buff *nskb = skb_unshare(skb, GFP_ATOMIC);
if (!nskb) {
rxrpc_eaten_skb(skb, rxrpc_skb_eaten_by_unshare_nomem);
goto out;
}
if (nskb != skb) {
rxrpc_eaten_skb(skb, rxrpc_skb_eaten_by_unshare);
skb = nskb;
rxrpc_new_skb(skb, rxrpc_skb_new_unshared);
sp = rxrpc_skb(skb);
}
}
break;
case RXRPC_PACKET_TYPE_CHALLENGE:
if (rxrpc_to_server(sp))
goto discard;
break;
case RXRPC_PACKET_TYPE_RESPONSE:
if (rxrpc_to_client(sp))
goto discard;
break;
/* Packet types 9-11 should just be ignored. */
case RXRPC_PACKET_TYPE_PARAMS:
case RXRPC_PACKET_TYPE_10:
case RXRPC_PACKET_TYPE_11:
goto discard;
default:
goto bad_message;
}
if (sp->hdr.serviceId == 0)
goto bad_message;
if (rxrpc_to_server(sp)) {
/* Weed out packets to services we're not offering. Packets
* that would begin a call are explicitly rejected and the rest
* are just discarded.
*/
rx = rcu_dereference(local->service);
if (!rx || (sp->hdr.serviceId != rx->srx.srx_service &&
sp->hdr.serviceId != rx->second_service)) {
if (sp->hdr.type == RXRPC_PACKET_TYPE_DATA &&
sp->hdr.seq == 1)
goto unsupported_service;
goto discard;
}
}
conn = rxrpc_find_connection_rcu(local, skb, &peer);
if (conn) {
if (sp->hdr.securityIndex != conn->security_ix)
goto wrong_security;
if (sp->hdr.serviceId != conn->service_id) {
int old_id;
if (!test_bit(RXRPC_CONN_PROBING_FOR_UPGRADE, &conn->flags))
goto reupgrade;
old_id = cmpxchg(&conn->service_id, conn->orig_service_id,
sp->hdr.serviceId);
if (old_id != conn->orig_service_id &&
old_id != sp->hdr.serviceId)
goto reupgrade;
}
if (sp->hdr.callNumber == 0) {
/* Connection-level packet */
_debug("CONN %p {%d}", conn, conn->debug_id);
rxrpc_post_packet_to_conn(conn, skb);
goto out;
}
if ((int)sp->hdr.serial - (int)conn->hi_serial > 0)
conn->hi_serial = sp->hdr.serial;
/* Call-bound packets are routed by connection channel. */
channel = sp->hdr.cid & RXRPC_CHANNELMASK;
chan = &conn->channels[channel];
/* Ignore really old calls */
if (sp->hdr.callNumber < chan->last_call)
goto discard;
if (sp->hdr.callNumber == chan->last_call) {
if (chan->call ||
sp->hdr.type == RXRPC_PACKET_TYPE_ABORT)
goto discard;
/* For the previous service call, if completed
* successfully, we discard all further packets.
*/
if (rxrpc_conn_is_service(conn) &&
chan->last_type == RXRPC_PACKET_TYPE_ACK)
goto discard;
/* But otherwise we need to retransmit the final packet
* from data cached in the connection record.
*/
if (sp->hdr.type == RXRPC_PACKET_TYPE_DATA)
trace_rxrpc_rx_data(chan->call_debug_id,
sp->hdr.seq,
sp->hdr.serial,
sp->hdr.flags);
rxrpc_post_packet_to_conn(conn, skb);
goto out;
}
call = rcu_dereference(chan->call);
if (sp->hdr.callNumber > chan->call_id) {
if (rxrpc_to_client(sp))
goto reject_packet;
if (call)
rxrpc_input_implicit_end_call(rx, conn, call);
call = NULL;
}
if (call) {
if (sp->hdr.serviceId != call->service_id)
call->service_id = sp->hdr.serviceId;
if ((int)sp->hdr.serial - (int)call->rx_serial > 0)
call->rx_serial = sp->hdr.serial;
if (!test_bit(RXRPC_CALL_RX_HEARD, &call->flags))
set_bit(RXRPC_CALL_RX_HEARD, &call->flags);
}
}
if (!call || refcount_read(&call->ref) == 0) {
if (rxrpc_to_client(sp) ||
sp->hdr.type != RXRPC_PACKET_TYPE_DATA)
goto bad_message;
if (sp->hdr.seq != 1)
goto discard;
call = rxrpc_new_incoming_call(local, rx, skb);
if (!call)
goto reject_packet;
}
/* Process a call packet; this either discards or passes on the ref
* elsewhere.
*/
rxrpc_input_call_packet(call, skb);
goto out;
discard:
rxrpc_free_skb(skb, rxrpc_skb_put_input);
out:
trace_rxrpc_rx_done(0, 0);
return 0;
wrong_security:
trace_rxrpc_abort(0, "SEC", sp->hdr.cid, sp->hdr.callNumber, sp->hdr.seq,
RXKADINCONSISTENCY, EBADMSG);
skb->priority = RXKADINCONSISTENCY;
goto post_abort;
unsupported_service:
trace_rxrpc_abort(0, "INV", sp->hdr.cid, sp->hdr.callNumber, sp->hdr.seq,
RX_INVALID_OPERATION, EOPNOTSUPP);
skb->priority = RX_INVALID_OPERATION;
goto post_abort;
reupgrade:
trace_rxrpc_abort(0, "UPG", sp->hdr.cid, sp->hdr.callNumber, sp->hdr.seq,
RX_PROTOCOL_ERROR, EBADMSG);
goto protocol_error;
bad_message:
trace_rxrpc_abort(0, "BAD", sp->hdr.cid, sp->hdr.callNumber, sp->hdr.seq,
RX_PROTOCOL_ERROR, EBADMSG);
protocol_error:
skb->priority = RX_PROTOCOL_ERROR;
post_abort:
skb->mark = RXRPC_SKB_MARK_REJECT_ABORT;
reject_packet:
trace_rxrpc_rx_done(skb->mark, skb->priority);
rxrpc_reject_packet(local, skb);
_leave(" [badmsg]");
return 0;
}

370
net/rxrpc/io_thread.c Normal file
View File

@ -0,0 +1,370 @@
// SPDX-License-Identifier: GPL-2.0-or-later
/* RxRPC packet reception
*
* Copyright (C) 2007, 2016 Red Hat, Inc. All Rights Reserved.
* Written by David Howells (dhowells@redhat.com)
*/
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
#include "ar-internal.h"
/*
* post connection-level events to the connection
* - this includes challenges, responses, some aborts and call terminal packet
* retransmission.
*/
static void rxrpc_post_packet_to_conn(struct rxrpc_connection *conn,
struct sk_buff *skb)
{
_enter("%p,%p", conn, skb);
skb_queue_tail(&conn->rx_queue, skb);
rxrpc_queue_conn(conn, rxrpc_conn_queue_rx_work);
}
/*
* post endpoint-level events to the local endpoint
* - this includes debug and version messages
*/
static void rxrpc_post_packet_to_local(struct rxrpc_local *local,
struct sk_buff *skb)
{
_enter("%p,%p", local, skb);
if (rxrpc_get_local_maybe(local, rxrpc_local_get_queue)) {
skb_queue_tail(&local->event_queue, skb);
rxrpc_queue_local(local);
} else {
rxrpc_free_skb(skb, rxrpc_skb_put_input);
}
}
/*
* put a packet up for transport-level abort
*/
static void rxrpc_reject_packet(struct rxrpc_local *local, struct sk_buff *skb)
{
if (rxrpc_get_local_maybe(local, rxrpc_local_get_queue)) {
skb_queue_tail(&local->reject_queue, skb);
rxrpc_queue_local(local);
} else {
rxrpc_free_skb(skb, rxrpc_skb_put_input);
}
}
/*
* Extract the wire header from a packet and translate the byte order.
*/
static noinline
int rxrpc_extract_header(struct rxrpc_skb_priv *sp, struct sk_buff *skb)
{
struct rxrpc_wire_header whdr;
/* dig out the RxRPC connection details */
if (skb_copy_bits(skb, 0, &whdr, sizeof(whdr)) < 0) {
trace_rxrpc_rx_eproto(NULL, sp->hdr.serial,
tracepoint_string("bad_hdr"));
return -EBADMSG;
}
memset(sp, 0, sizeof(*sp));
sp->hdr.epoch = ntohl(whdr.epoch);
sp->hdr.cid = ntohl(whdr.cid);
sp->hdr.callNumber = ntohl(whdr.callNumber);
sp->hdr.seq = ntohl(whdr.seq);
sp->hdr.serial = ntohl(whdr.serial);
sp->hdr.flags = whdr.flags;
sp->hdr.type = whdr.type;
sp->hdr.userStatus = whdr.userStatus;
sp->hdr.securityIndex = whdr.securityIndex;
sp->hdr._rsvd = ntohs(whdr._rsvd);
sp->hdr.serviceId = ntohs(whdr.serviceId);
return 0;
}
/*
* Extract the abort code from an ABORT packet and stash it in skb->priority.
*/
static bool rxrpc_extract_abort(struct sk_buff *skb)
{
__be32 wtmp;
if (skb_copy_bits(skb, sizeof(struct rxrpc_wire_header),
&wtmp, sizeof(wtmp)) < 0)
return false;
skb->priority = ntohl(wtmp);
return true;
}
/*
* handle data received on the local endpoint
* - may be called in interrupt context
*
* [!] Note that as this is called from the encap_rcv hook, the socket is not
* held locked by the caller and nothing prevents sk_user_data on the UDP from
* being cleared in the middle of processing this function.
*
* Called with the RCU read lock held from the IP layer via UDP.
*/
int rxrpc_input_packet(struct sock *udp_sk, struct sk_buff *skb)
{
struct rxrpc_local *local = rcu_dereference_sk_user_data(udp_sk);
struct rxrpc_connection *conn;
struct rxrpc_channel *chan;
struct rxrpc_call *call = NULL;
struct rxrpc_skb_priv *sp;
struct rxrpc_peer *peer = NULL;
struct rxrpc_sock *rx = NULL;
unsigned int channel;
_enter("%p", udp_sk);
if (unlikely(!local)) {
kfree_skb(skb);
return 0;
}
if (skb->tstamp == 0)
skb->tstamp = ktime_get_real();
rxrpc_new_skb(skb, rxrpc_skb_new_encap_rcv);
skb_pull(skb, sizeof(struct udphdr));
/* The UDP protocol already released all skb resources;
* we are free to add our own data there.
*/
sp = rxrpc_skb(skb);
/* dig out the RxRPC connection details */
if (rxrpc_extract_header(sp, skb) < 0)
goto bad_message;
if (IS_ENABLED(CONFIG_AF_RXRPC_INJECT_LOSS)) {
static int lose;
if ((lose++ & 7) == 7) {
trace_rxrpc_rx_lose(sp);
rxrpc_free_skb(skb, rxrpc_skb_put_lose);
return 0;
}
}
if (skb->tstamp == 0)
skb->tstamp = ktime_get_real();
trace_rxrpc_rx_packet(sp);
switch (sp->hdr.type) {
case RXRPC_PACKET_TYPE_VERSION:
if (rxrpc_to_client(sp))
goto discard;
rxrpc_post_packet_to_local(local, skb);
goto out;
case RXRPC_PACKET_TYPE_BUSY:
if (rxrpc_to_server(sp))
goto discard;
fallthrough;
case RXRPC_PACKET_TYPE_ACK:
case RXRPC_PACKET_TYPE_ACKALL:
if (sp->hdr.callNumber == 0)
goto bad_message;
break;
case RXRPC_PACKET_TYPE_ABORT:
if (!rxrpc_extract_abort(skb))
return true; /* Just discard if malformed */
break;
case RXRPC_PACKET_TYPE_DATA:
if (sp->hdr.callNumber == 0 ||
sp->hdr.seq == 0)
goto bad_message;
/* Unshare the packet so that it can be modified for in-place
* decryption.
*/
if (sp->hdr.securityIndex != 0) {
struct sk_buff *nskb = skb_unshare(skb, GFP_ATOMIC);
if (!nskb) {
rxrpc_eaten_skb(skb, rxrpc_skb_eaten_by_unshare_nomem);
goto out;
}
if (nskb != skb) {
rxrpc_eaten_skb(skb, rxrpc_skb_eaten_by_unshare);
skb = nskb;
rxrpc_new_skb(skb, rxrpc_skb_new_unshared);
sp = rxrpc_skb(skb);
}
}
break;
case RXRPC_PACKET_TYPE_CHALLENGE:
if (rxrpc_to_server(sp))
goto discard;
break;
case RXRPC_PACKET_TYPE_RESPONSE:
if (rxrpc_to_client(sp))
goto discard;
break;
/* Packet types 9-11 should just be ignored. */
case RXRPC_PACKET_TYPE_PARAMS:
case RXRPC_PACKET_TYPE_10:
case RXRPC_PACKET_TYPE_11:
goto discard;
default:
goto bad_message;
}
if (sp->hdr.serviceId == 0)
goto bad_message;
if (rxrpc_to_server(sp)) {
/* Weed out packets to services we're not offering. Packets
* that would begin a call are explicitly rejected and the rest
* are just discarded.
*/
rx = rcu_dereference(local->service);
if (!rx || (sp->hdr.serviceId != rx->srx.srx_service &&
sp->hdr.serviceId != rx->second_service)) {
if (sp->hdr.type == RXRPC_PACKET_TYPE_DATA &&
sp->hdr.seq == 1)
goto unsupported_service;
goto discard;
}
}
conn = rxrpc_find_connection_rcu(local, skb, &peer);
if (conn) {
if (sp->hdr.securityIndex != conn->security_ix)
goto wrong_security;
if (sp->hdr.serviceId != conn->service_id) {
int old_id;
if (!test_bit(RXRPC_CONN_PROBING_FOR_UPGRADE, &conn->flags))
goto reupgrade;
old_id = cmpxchg(&conn->service_id, conn->orig_service_id,
sp->hdr.serviceId);
if (old_id != conn->orig_service_id &&
old_id != sp->hdr.serviceId)
goto reupgrade;
}
if (sp->hdr.callNumber == 0) {
/* Connection-level packet */
_debug("CONN %p {%d}", conn, conn->debug_id);
rxrpc_post_packet_to_conn(conn, skb);
goto out;
}
if ((int)sp->hdr.serial - (int)conn->hi_serial > 0)
conn->hi_serial = sp->hdr.serial;
/* Call-bound packets are routed by connection channel. */
channel = sp->hdr.cid & RXRPC_CHANNELMASK;
chan = &conn->channels[channel];
/* Ignore really old calls */
if (sp->hdr.callNumber < chan->last_call)
goto discard;
if (sp->hdr.callNumber == chan->last_call) {
if (chan->call ||
sp->hdr.type == RXRPC_PACKET_TYPE_ABORT)
goto discard;
/* For the previous service call, if completed
* successfully, we discard all further packets.
*/
if (rxrpc_conn_is_service(conn) &&
chan->last_type == RXRPC_PACKET_TYPE_ACK)
goto discard;
/* But otherwise we need to retransmit the final packet
* from data cached in the connection record.
*/
if (sp->hdr.type == RXRPC_PACKET_TYPE_DATA)
trace_rxrpc_rx_data(chan->call_debug_id,
sp->hdr.seq,
sp->hdr.serial,
sp->hdr.flags);
rxrpc_post_packet_to_conn(conn, skb);
goto out;
}
call = rcu_dereference(chan->call);
if (sp->hdr.callNumber > chan->call_id) {
if (rxrpc_to_client(sp))
goto reject_packet;
if (call)
rxrpc_input_implicit_end_call(rx, conn, call);
call = NULL;
}
if (call) {
if (sp->hdr.serviceId != call->service_id)
call->service_id = sp->hdr.serviceId;
if ((int)sp->hdr.serial - (int)call->rx_serial > 0)
call->rx_serial = sp->hdr.serial;
if (!test_bit(RXRPC_CALL_RX_HEARD, &call->flags))
set_bit(RXRPC_CALL_RX_HEARD, &call->flags);
}
}
if (!call || refcount_read(&call->ref) == 0) {
if (rxrpc_to_client(sp) ||
sp->hdr.type != RXRPC_PACKET_TYPE_DATA)
goto bad_message;
if (sp->hdr.seq != 1)
goto discard;
call = rxrpc_new_incoming_call(local, rx, skb);
if (!call)
goto reject_packet;
}
/* Process a call packet; this either discards or passes on the ref
* elsewhere.
*/
rxrpc_input_call_packet(call, skb);
goto out;
discard:
rxrpc_free_skb(skb, rxrpc_skb_put_input);
out:
trace_rxrpc_rx_done(0, 0);
return 0;
wrong_security:
trace_rxrpc_abort(0, "SEC", sp->hdr.cid, sp->hdr.callNumber, sp->hdr.seq,
RXKADINCONSISTENCY, EBADMSG);
skb->priority = RXKADINCONSISTENCY;
goto post_abort;
unsupported_service:
trace_rxrpc_abort(0, "INV", sp->hdr.cid, sp->hdr.callNumber, sp->hdr.seq,
RX_INVALID_OPERATION, EOPNOTSUPP);
skb->priority = RX_INVALID_OPERATION;
goto post_abort;
reupgrade:
trace_rxrpc_abort(0, "UPG", sp->hdr.cid, sp->hdr.callNumber, sp->hdr.seq,
RX_PROTOCOL_ERROR, EBADMSG);
goto protocol_error;
bad_message:
trace_rxrpc_abort(0, "BAD", sp->hdr.cid, sp->hdr.callNumber, sp->hdr.seq,
RX_PROTOCOL_ERROR, EBADMSG);
protocol_error:
skb->priority = RX_PROTOCOL_ERROR;
post_abort:
skb->mark = RXRPC_SKB_MARK_REJECT_ABORT;
reject_packet:
trace_rxrpc_rx_done(skb->mark, skb->priority);
rxrpc_reject_packet(local, skb);
_leave(" [badmsg]");
return 0;
}