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afs: Trace the initiation and completion of client calls

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Add tracepoints to trace the initiation and completion of client calls
within the kafs filesystem.

The afs_make_vl_call tracepoint watches calls to the volume location
database server.

The afs_make_fs_call tracepoint watches calls to the file server.

The afs_call_done tracepoint watches for call completion.

Signed-off-by: David Howells <dhowells@redhat.com>
This commit is contained in:
David Howells
2017-11-02 15:27:51 +00:00
parent becfcc7e57
commit 025db80c9e
5 changed files with 233 additions and 20 deletions
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25
fs/afs/rxrpc.c
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@@ -219,6 +219,7 @@ struct afs_call *afs_alloc_flat_call(struct afs_net *net,
goto nomem_free;
}
call->operation_ID = type->op;
init_waitqueue_head(&call->waitq);
return call;
@@ -422,6 +423,8 @@ error_do_abort:
ac->abort_code = call->abort_code;
ac->responded = true;
}
call->error = ret;
trace_afs_call_done(call);
error_kill_call:
afs_put_call(call);
ac->error = ret;
@@ -455,10 +458,10 @@ static void afs_deliver_to_call(struct afs_call *call)
if (ret == -EINPROGRESS || ret == -EAGAIN)
return;
if (ret == 1 || ret < 0) {
call->state = AFS_CALL_COMPLETE;
goto done;
}
if (ret < 0)
call->error = ret;
if (ret < 0 || ret == 1)
goto call_complete;
return;
}
@@ -466,7 +469,7 @@ static void afs_deliver_to_call(struct afs_call *call)
switch (ret) {
case 0:
if (call->state == AFS_CALL_AWAIT_REPLY)
call->state = AFS_CALL_COMPLETE;
goto call_complete;
goto done;
case -EINPROGRESS:
case -EAGAIN:
@@ -505,7 +508,11 @@ out:
save_error:
call->error = ret;
call->state = AFS_CALL_COMPLETE;
call_complete:
if (call->state != AFS_CALL_COMPLETE) {
call->state = AFS_CALL_COMPLETE;
trace_afs_call_done(call);
}
goto done;
}
@@ -567,8 +574,10 @@ static long afs_wait_for_call_to_complete(struct afs_call *call,
if (call->state < AFS_CALL_COMPLETE) {
_debug("call interrupted");
if (rxrpc_kernel_abort_call(call->net->socket, call->rxcall,
RX_USER_ABORT, -EINTR, "KWI"))
RX_USER_ABORT, -EINTR, "KWI")) {
call->error = -ERESTARTSYS;
trace_afs_call_done(call);
}
}
ac->abort_code = call->abort_code;
@@ -882,6 +891,7 @@ int afs_extract_data(struct afs_call *call, void *buf, size_t count,
switch (call->state) {
case AFS_CALL_AWAIT_REPLY:
call->state = AFS_CALL_COMPLETE;
trace_afs_call_done(call);
break;
case AFS_CALL_AWAIT_REQUEST:
call->state = AFS_CALL_REPLYING;
@@ -894,5 +904,6 @@ int afs_extract_data(struct afs_call *call, void *buf, size_t count,
call->error = ret;
call->state = AFS_CALL_COMPLETE;
trace_afs_call_done(call);
return ret;
}