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rxrpc: Tidy up abort generation infrastructure

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Tidy up the abort generation infrastructure in the following ways:

 (1) Create an enum and string mapping table to list the reasons an abort
     might be generated in tracing.

 (2) Replace the 3-char string with the values from (1) in the places that
     use that to log the abort source.  This gets rid of a memcpy() in the
     tracepoint.

 (3) Subsume the rxrpc_rx_eproto tracepoint with the rxrpc_abort tracepoint
     and use values from (1) to indicate the trace reason.

 (4) Always make a call to an abort function at the point of the abort
     rather than stashing the values into variables and using goto to get
     to a place where it reported.  The C optimiser will collapse the calls
     together as appropriate.  The abort functions return a value that can
     be returned directly if appropriate.

Note that this extends into afs also at the points where that generates an
abort.  To aid with this, the afs sources need to #define
RXRPC_TRACE_ONLY_DEFINE_ENUMS before including the rxrpc tracing header
because they don't have access to the rxrpc internal structures that some
of the tracepoints make use of.

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
2022-10-06 21:45:42 +01:00
parent a00ce28b17
commit 57af281e53
17 changed files with 484 additions and 444 deletions
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17
net/rxrpc/rxperf.c
View File

@@ -10,6 +10,8 @@
#include <linux/slab.h>
#include <net/sock.h>
#include <net/af_rxrpc.h>
#define RXRPC_TRACE_ONLY_DEFINE_ENUMS
#include <trace/events/rxrpc.h>
MODULE_DESCRIPTION("rxperf test server (afs)");
MODULE_AUTHOR("Red Hat, Inc.");
@@ -307,12 +309,14 @@ static void rxperf_deliver_to_call(struct work_struct *work)
case -EOPNOTSUPP:
abort_code = RXGEN_OPCODE;
rxrpc_kernel_abort_call(rxperf_socket, call->rxcall,
abort_code, ret, "GOP");
abort_code, ret,
rxperf_abort_op_not_supported);
goto call_complete;
case -ENOTSUPP:
abort_code = RX_USER_ABORT;
rxrpc_kernel_abort_call(rxperf_socket, call->rxcall,
abort_code, ret, "GUA");
abort_code, ret,
rxperf_abort_op_not_supported);
goto call_complete;
case -EIO:
pr_err("Call %u in bad state %u\n",
@@ -324,11 +328,13 @@ static void rxperf_deliver_to_call(struct work_struct *work)
case -ENOMEM:
case -EFAULT:
rxrpc_kernel_abort_call(rxperf_socket, call->rxcall,
RXGEN_SS_UNMARSHAL, ret, "GUM");
RXGEN_SS_UNMARSHAL, ret,
rxperf_abort_unmarshal_error);
goto call_complete;
default:
rxrpc_kernel_abort_call(rxperf_socket, call->rxcall,
RX_CALL_DEAD, ret, "GER");
RX_CALL_DEAD, ret,
rxperf_abort_general_error);
goto call_complete;
}
}
@@ -523,7 +529,8 @@ static int rxperf_process_call(struct rxperf_call *call)
if (n == -ENOMEM)
rxrpc_kernel_abort_call(rxperf_socket, call->rxcall,
RXGEN_SS_MARSHAL, -ENOMEM, "GOM");
RXGEN_SS_MARSHAL, -ENOMEM,
rxperf_abort_oom);
return n;
}