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authorDavid Howells <dhowells@redhat.com>2016-04-07 19:23:30 +0300
committerDavid S. Miller <davem@davemloft.net>2016-04-11 22:34:40 +0300
commitdc44b3a09aec9ac57c1e7410677c87c0e6453624 (patch)
treef1d8e6b201aec9bad334ab6e9df06ccce6bdfd36 /net/rxrpc
parent5b3e87f19e71b7a2f789c40de04704886932b5cf (diff)
downloadlinux-dc44b3a09aec9ac57c1e7410677c87c0e6453624.tar.xz
rxrpc: Differentiate local and remote abort codes in structs
In the rxrpc_connection and rxrpc_call structs, there's one field to hold the abort code, no matter whether that value was generated locally to be sent or was received from the peer via an abort packet. Split the abort code fields in two for cleanliness sake and add an error field to hold the Linux error number to the rxrpc_call struct too (sometimes this is generated in a context where we can't return it to userspace directly). Furthermore, add a skb mark to indicate a packet that caused a local abort to be generated so that recvmsg() can pick up the correct abort code. A future addition will need to be to indicate to userspace the difference between aborts via a control message. Signed-off-by: David Howells <dhowells@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/rxrpc')
-rw-r--r--net/rxrpc/ar-ack.c4
-rw-r--r--net/rxrpc/ar-call.c4
-rw-r--r--net/rxrpc/ar-connevent.c12
-rw-r--r--net/rxrpc/ar-input.c6
-rw-r--r--net/rxrpc/ar-internal.h10
-rw-r--r--net/rxrpc/ar-output.c2
-rw-r--r--net/rxrpc/ar-proc.c2
-rw-r--r--net/rxrpc/ar-recvmsg.c18
8 files changed, 37 insertions, 21 deletions
diff --git a/net/rxrpc/ar-ack.c b/net/rxrpc/ar-ack.c
index 54bf43ba9aa8..d0eb98e1391c 100644
--- a/net/rxrpc/ar-ack.c
+++ b/net/rxrpc/ar-ack.c
@@ -905,7 +905,7 @@ void rxrpc_process_call(struct work_struct *work)
ECONNABORTED, true) < 0)
goto no_mem;
whdr.type = RXRPC_PACKET_TYPE_ABORT;
- data = htonl(call->abort_code);
+ data = htonl(call->local_abort);
iov[1].iov_base = &data;
iov[1].iov_len = sizeof(data);
genbit = RXRPC_CALL_EV_ABORT;
@@ -968,7 +968,7 @@ void rxrpc_process_call(struct work_struct *work)
write_lock_bh(&call->state_lock);
if (call->state <= RXRPC_CALL_COMPLETE) {
call->state = RXRPC_CALL_LOCALLY_ABORTED;
- call->abort_code = RX_CALL_TIMEOUT;
+ call->local_abort = RX_CALL_TIMEOUT;
set_bit(RXRPC_CALL_EV_ABORT, &call->events);
}
write_unlock_bh(&call->state_lock);
diff --git a/net/rxrpc/ar-call.c b/net/rxrpc/ar-call.c
index 7c8d300ade9b..67a211f0ebba 100644
--- a/net/rxrpc/ar-call.c
+++ b/net/rxrpc/ar-call.c
@@ -682,7 +682,7 @@ void rxrpc_release_call(struct rxrpc_call *call)
call->state != RXRPC_CALL_CLIENT_FINAL_ACK) {
_debug("+++ ABORTING STATE %d +++\n", call->state);
call->state = RXRPC_CALL_LOCALLY_ABORTED;
- call->abort_code = RX_CALL_DEAD;
+ call->local_abort = RX_CALL_DEAD;
set_bit(RXRPC_CALL_EV_ABORT, &call->events);
rxrpc_queue_call(call);
}
@@ -758,7 +758,7 @@ static void rxrpc_mark_call_released(struct rxrpc_call *call)
if (call->state < RXRPC_CALL_COMPLETE) {
_debug("abort call %p", call);
call->state = RXRPC_CALL_LOCALLY_ABORTED;
- call->abort_code = RX_CALL_DEAD;
+ call->local_abort = RX_CALL_DEAD;
if (!test_and_set_bit(RXRPC_CALL_EV_ABORT, &call->events))
sched = true;
}
diff --git a/net/rxrpc/ar-connevent.c b/net/rxrpc/ar-connevent.c
index 1bdaaed8cdc4..4dc6ab81fd2f 100644
--- a/net/rxrpc/ar-connevent.c
+++ b/net/rxrpc/ar-connevent.c
@@ -40,11 +40,13 @@ static void rxrpc_abort_calls(struct rxrpc_connection *conn, int state,
write_lock(&call->state_lock);
if (call->state <= RXRPC_CALL_COMPLETE) {
call->state = state;
- call->abort_code = abort_code;
- if (state == RXRPC_CALL_LOCALLY_ABORTED)
+ if (state == RXRPC_CALL_LOCALLY_ABORTED) {
+ call->local_abort = conn->local_abort;
set_bit(RXRPC_CALL_EV_CONN_ABORT, &call->events);
- else
+ } else {
+ call->remote_abort = conn->remote_abort;
set_bit(RXRPC_CALL_EV_RCVD_ABORT, &call->events);
+ }
rxrpc_queue_call(call);
}
write_unlock(&call->state_lock);
@@ -101,7 +103,7 @@ static int rxrpc_abort_connection(struct rxrpc_connection *conn,
whdr._rsvd = 0;
whdr.serviceId = htons(conn->service_id);
- word = htonl(abort_code);
+ word = htonl(conn->local_abort);
iov[0].iov_base = &whdr;
iov[0].iov_len = sizeof(whdr);
@@ -112,7 +114,7 @@ static int rxrpc_abort_connection(struct rxrpc_connection *conn,
serial = atomic_inc_return(&conn->serial);
whdr.serial = htonl(serial);
- _proto("Tx CONN ABORT %%%u { %d }", serial, abort_code);
+ _proto("Tx CONN ABORT %%%u { %d }", serial, conn->local_abort);
ret = kernel_sendmsg(conn->trans->local->socket, &msg, iov, 2, len);
if (ret < 0) {
diff --git a/net/rxrpc/ar-input.c b/net/rxrpc/ar-input.c
index c947cd13f435..c6c784d3a3e8 100644
--- a/net/rxrpc/ar-input.c
+++ b/net/rxrpc/ar-input.c
@@ -349,7 +349,7 @@ void rxrpc_fast_process_packet(struct rxrpc_call *call, struct sk_buff *skb)
write_lock_bh(&call->state_lock);
if (call->state < RXRPC_CALL_COMPLETE) {
call->state = RXRPC_CALL_REMOTELY_ABORTED;
- call->abort_code = abort_code;
+ call->remote_abort = abort_code;
set_bit(RXRPC_CALL_EV_RCVD_ABORT, &call->events);
rxrpc_queue_call(call);
}
@@ -422,7 +422,7 @@ protocol_error:
protocol_error_locked:
if (call->state <= RXRPC_CALL_COMPLETE) {
call->state = RXRPC_CALL_LOCALLY_ABORTED;
- call->abort_code = RX_PROTOCOL_ERROR;
+ call->local_abort = RX_PROTOCOL_ERROR;
set_bit(RXRPC_CALL_EV_ABORT, &call->events);
rxrpc_queue_call(call);
}
@@ -494,7 +494,7 @@ protocol_error:
write_lock_bh(&call->state_lock);
if (call->state <= RXRPC_CALL_COMPLETE) {
call->state = RXRPC_CALL_LOCALLY_ABORTED;
- call->abort_code = RX_PROTOCOL_ERROR;
+ call->local_abort = RX_PROTOCOL_ERROR;
set_bit(RXRPC_CALL_EV_ABORT, &call->events);
rxrpc_queue_call(call);
}
diff --git a/net/rxrpc/ar-internal.h b/net/rxrpc/ar-internal.h
index eeb829e837e1..258b74a2a23f 100644
--- a/net/rxrpc/ar-internal.h
+++ b/net/rxrpc/ar-internal.h
@@ -289,7 +289,9 @@ struct rxrpc_connection {
RXRPC_CONN_LOCALLY_ABORTED, /* - conn aborted locally */
RXRPC_CONN_NETWORK_ERROR, /* - conn terminated by network error */
} state;
- int error; /* error code for local abort */
+ u32 local_abort; /* local abort code */
+ u32 remote_abort; /* remote abort code */
+ int error; /* local error incurred */
int debug_id; /* debug ID for printks */
unsigned int call_counter; /* call ID counter */
atomic_t serial; /* packet serial number counter */
@@ -399,7 +401,9 @@ struct rxrpc_call {
rwlock_t state_lock; /* lock for state transition */
atomic_t usage;
atomic_t sequence; /* Tx data packet sequence counter */
- u32 abort_code; /* local/remote abort code */
+ u32 local_abort; /* local abort code */
+ u32 remote_abort; /* remote abort code */
+ int error; /* local error incurred */
enum rxrpc_call_state state : 8; /* current state of call */
int debug_id; /* debug ID for printks */
u8 channel; /* connection channel occupied by this call */
@@ -453,7 +457,7 @@ static inline void rxrpc_abort_call(struct rxrpc_call *call, u32 abort_code)
{
write_lock_bh(&call->state_lock);
if (call->state < RXRPC_CALL_COMPLETE) {
- call->abort_code = abort_code;
+ call->local_abort = abort_code;
call->state = RXRPC_CALL_LOCALLY_ABORTED;
set_bit(RXRPC_CALL_EV_ABORT, &call->events);
}
diff --git a/net/rxrpc/ar-output.c b/net/rxrpc/ar-output.c
index d36fb6e1a29c..94e7d9537437 100644
--- a/net/rxrpc/ar-output.c
+++ b/net/rxrpc/ar-output.c
@@ -110,7 +110,7 @@ static void rxrpc_send_abort(struct rxrpc_call *call, u32 abort_code)
if (call->state <= RXRPC_CALL_COMPLETE) {
call->state = RXRPC_CALL_LOCALLY_ABORTED;
- call->abort_code = abort_code;
+ call->local_abort = abort_code;
set_bit(RXRPC_CALL_EV_ABORT, &call->events);
del_timer_sync(&call->resend_timer);
del_timer_sync(&call->ack_timer);
diff --git a/net/rxrpc/ar-proc.c b/net/rxrpc/ar-proc.c
index 525b2ba5a8f4..225163bc658d 100644
--- a/net/rxrpc/ar-proc.c
+++ b/net/rxrpc/ar-proc.c
@@ -80,7 +80,7 @@ static int rxrpc_call_seq_show(struct seq_file *seq, void *v)
call->conn->in_clientflag ? "Svc" : "Clt",
atomic_read(&call->usage),
rxrpc_call_states[call->state],
- call->abort_code,
+ call->remote_abort ?: call->local_abort,
call->user_call_ID);
return 0;
diff --git a/net/rxrpc/ar-recvmsg.c b/net/rxrpc/ar-recvmsg.c
index 64facba24a45..160f0927aa3e 100644
--- a/net/rxrpc/ar-recvmsg.c
+++ b/net/rxrpc/ar-recvmsg.c
@@ -288,7 +288,11 @@ receive_non_data_message:
ret = put_cmsg(msg, SOL_RXRPC, RXRPC_BUSY, 0, &abort_code);
break;
case RXRPC_SKB_MARK_REMOTE_ABORT:
- abort_code = call->abort_code;
+ abort_code = call->remote_abort;
+ ret = put_cmsg(msg, SOL_RXRPC, RXRPC_ABORT, 4, &abort_code);
+ break;
+ case RXRPC_SKB_MARK_LOCAL_ABORT:
+ abort_code = call->local_abort;
ret = put_cmsg(msg, SOL_RXRPC, RXRPC_ABORT, 4, &abort_code);
break;
case RXRPC_SKB_MARK_NET_ERROR:
@@ -303,6 +307,7 @@ receive_non_data_message:
&abort_code);
break;
default:
+ pr_err("RxRPC: Unknown packet mark %u\n", skb->mark);
BUG();
break;
}
@@ -401,9 +406,14 @@ u32 rxrpc_kernel_get_abort_code(struct sk_buff *skb)
{
struct rxrpc_skb_priv *sp = rxrpc_skb(skb);
- ASSERTCMP(skb->mark, ==, RXRPC_SKB_MARK_REMOTE_ABORT);
-
- return sp->call->abort_code;
+ switch (skb->mark) {
+ case RXRPC_SKB_MARK_REMOTE_ABORT:
+ return sp->call->remote_abort;
+ case RXRPC_SKB_MARK_LOCAL_ABORT:
+ return sp->call->local_abort;
+ default:
+ BUG();
+ }
}
EXPORT_SYMBOL(rxrpc_kernel_get_abort_code);