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rxrpc: Add tracepoint for working out where aborts happen

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Add a tracepoint for working out where local aborts happen.  Each
tracepoint call is labelled with a 3-letter code so that they can be
distinguished - and the DATA sequence number is added too where available.

rxrpc_kernel_abort_call() also takes a 3-letter code so that AFS can
indicate the circumstances when it aborts a call.

Signed-off-by: David Howells <dhowells@redhat.com>
This commit is contained in:
David Howells
2016-09-06 22:19:51 +01:00
parent e8d6bbb05a
commit 5a42976d4f
11 changed files with 132 additions and 98 deletions
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17
fs/afs/rxrpc.c
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@@ -377,7 +377,7 @@ int afs_make_call(struct in_addr *addr, struct afs_call *call, gfp_t gfp,
return wait_mode->wait(call);
error_do_abort:
rxrpc_kernel_abort_call(afs_socket, rxcall, RX_USER_ABORT);
rxrpc_kernel_abort_call(afs_socket, rxcall, RX_USER_ABORT, -ret, "KSD");
error_kill_call:
afs_end_call(call);
_leave(" = %d", ret);
@@ -425,12 +425,12 @@ static void afs_deliver_to_call(struct afs_call *call)
case -ENOTCONN:
abort_code = RX_CALL_DEAD;
rxrpc_kernel_abort_call(afs_socket, call->rxcall,
abort_code);
abort_code, -ret, "KNC");
goto do_abort;
case -ENOTSUPP:
abort_code = RX_INVALID_OPERATION;
rxrpc_kernel_abort_call(afs_socket, call->rxcall,
abort_code);
abort_code, -ret, "KIV");
goto do_abort;
case -ENODATA:
case -EBADMSG:
@@ -440,7 +440,7 @@ static void afs_deliver_to_call(struct afs_call *call)
if (call->state != AFS_CALL_AWAIT_REPLY)
abort_code = RXGEN_SS_UNMARSHAL;
rxrpc_kernel_abort_call(afs_socket, call->rxcall,
abort_code);
abort_code, EBADMSG, "KUM");
goto do_abort;
}
}
@@ -463,6 +463,7 @@ do_abort:
*/
static int afs_wait_for_call_to_complete(struct afs_call *call)
{
const char *abort_why;
int ret;
DECLARE_WAITQUEUE(myself, current);
@@ -481,9 +482,11 @@ static int afs_wait_for_call_to_complete(struct afs_call *call)
continue;
}
abort_why = "KWC";
ret = call->error;
if (call->state == AFS_CALL_COMPLETE)
break;
abort_why = "KWI";
ret = -EINTR;
if (signal_pending(current))
break;
@@ -497,7 +500,7 @@ static int afs_wait_for_call_to_complete(struct afs_call *call)
if (call->state < AFS_CALL_COMPLETE) {
_debug("call incomplete");
rxrpc_kernel_abort_call(afs_socket, call->rxcall,
RX_CALL_DEAD);
RX_CALL_DEAD, -ret, abort_why);
}
_debug("call complete");
@@ -695,7 +698,7 @@ void afs_send_empty_reply(struct afs_call *call)
case -ENOMEM:
_debug("oom");
rxrpc_kernel_abort_call(afs_socket, call->rxcall,
RX_USER_ABORT);
RX_USER_ABORT, ENOMEM, "KOO");
default:
afs_end_call(call);
_leave(" [error]");
@@ -734,7 +737,7 @@ void afs_send_simple_reply(struct afs_call *call, const void *buf, size_t len)
if (n == -ENOMEM) {
_debug("oom");
rxrpc_kernel_abort_call(afs_socket, call->rxcall,
RX_USER_ABORT);
RX_USER_ABORT, ENOMEM, "KOO");
}
afs_end_call(call);
_leave(" [error]");