From patchwork Fri May 20 16:46:33 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: David Howells X-Patchwork-Id: 12857002 X-Patchwork-Delegate: kuba@kernel.org Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 45190C4332F for ; Fri, 20 May 2022 16:46:59 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1351842AbiETQq6 (ORCPT ); Fri, 20 May 2022 12:46:58 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:54702 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1351865AbiETQqr (ORCPT ); Fri, 20 May 2022 12:46:47 -0400 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.129.124]) by lindbergh.monkeyblade.net (Postfix) with ESMTP id 77B3A3524F for ; Fri, 20 May 2022 09:46:45 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1653065204; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=DA7O6pbC6Izg24fMA0Z1M6bRg/AzBMzyB/mvXSj7xlU=; b=GaLiFfam84CYSQBFbQolr8FSJfdNpgEo/Rt5fOwF3oyR7yCUSVaNgr022xPBvRMqfMQQgq WuEmrX8OIatbD1teI2+3hOQZoMcKivYCJDSFvRiaGbx8uKdlEOM21XysrjdOfcsT54ZywY s7sHD2ClA30S5ojEvzBkUGqSGpzBQ+c= Received: from mimecast-mx02.redhat.com (mx3-rdu2.redhat.com [66.187.233.73]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id us-mta-551-WxEePOZfMj2r7ktl59xwfA-1; Fri, 20 May 2022 12:46:35 -0400 X-MC-Unique: WxEePOZfMj2r7ktl59xwfA-1 Received: from smtp.corp.redhat.com (int-mx01.intmail.prod.int.rdu2.redhat.com [10.11.54.1]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id D698F38041D3; Fri, 20 May 2022 16:46:34 +0000 (UTC) Received: from warthog.procyon.org.uk (unknown [10.33.36.8]) by smtp.corp.redhat.com (Postfix) with ESMTP id 2C91D40CFD00; Fri, 20 May 2022 16:46:34 +0000 (UTC) Organization: Red Hat UK Ltd. Registered Address: Red Hat UK Ltd, Amberley Place, 107-111 Peascod Street, Windsor, Berkshire, SI4 1TE, United Kingdom. Registered in England and Wales under Company Registration No. 3798903 Subject: [PATCH net-next 6/7] rxrpc, afs: Fix selection of abort codes From: David Howells To: netdev@vger.kernel.org Cc: dhowells@redhat.com, linux-afs@lists.infradead.org, linux-kernel@vger.kernel.org Date: Fri, 20 May 2022 17:46:33 +0100 Message-ID: <165306519350.34989.5122705705434053803.stgit@warthog.procyon.org.uk> In-Reply-To: <165306515409.34989.4713077338482294594.stgit@warthog.procyon.org.uk> References: <165306515409.34989.4713077338482294594.stgit@warthog.procyon.org.uk> User-Agent: StGit/1.4 MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.84 on 10.11.54.1 Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org X-Patchwork-Delegate: kuba@kernel.org The RX_USER_ABORT code should really only be used to indicate that the user of the rxrpc service (ie. userspace) implicitly caused a call to be aborted - for instance if the AF_RXRPC socket is closed whilst the call was in progress. (The user may also explicitly abort a call and specify the abort code to use). Change some of the points of generation to use other abort codes instead: (1) Abort the call with RXGEN_SS_UNMARSHAL or RXGEN_CC_UNMARSHAL if we see ENOMEM and EFAULT during received data delivery and abort with RX_CALL_DEAD in the default case. (2) Abort with RXGEN_SS_MARSHAL if we get ENOMEM whilst trying to send a reply. (3) Abort with RX_CALL_DEAD if we stop hearing from the peer if we had heard from the peer and abort with RX_CALL_TIMEOUT if we hadn't. (4) Abort with RX_CALL_DEAD if we try to disconnect a call that's not completed successfully or been aborted. Reported-by: Jeffrey Altman Signed-off-by: David Howells cc: Marc Dionne cc: linux-afs@lists.infradead.org --- fs/afs/rxrpc.c | 8 +++++--- net/rxrpc/call_event.c | 4 ++-- net/rxrpc/conn_object.c | 2 +- 3 files changed, 8 insertions(+), 6 deletions(-) diff --git a/fs/afs/rxrpc.c b/fs/afs/rxrpc.c index 23a1a92d64bb..a5434f3e57c6 100644 --- a/fs/afs/rxrpc.c +++ b/fs/afs/rxrpc.c @@ -537,6 +537,8 @@ static void afs_deliver_to_call(struct afs_call *call) case -ENODATA: case -EBADMSG: case -EMSGSIZE: + case -ENOMEM: + case -EFAULT: abort_code = RXGEN_CC_UNMARSHAL; if (state != AFS_CALL_CL_AWAIT_REPLY) abort_code = RXGEN_SS_UNMARSHAL; @@ -544,7 +546,7 @@ static void afs_deliver_to_call(struct afs_call *call) abort_code, ret, "KUM"); goto local_abort; default: - abort_code = RX_USER_ABORT; + abort_code = RX_CALL_DEAD; rxrpc_kernel_abort_call(call->net->socket, call->rxcall, abort_code, ret, "KER"); goto local_abort; @@ -836,7 +838,7 @@ void afs_send_empty_reply(struct afs_call *call) case -ENOMEM: _debug("oom"); rxrpc_kernel_abort_call(net->socket, call->rxcall, - RX_USER_ABORT, -ENOMEM, "KOO"); + RXGEN_SS_MARSHAL, -ENOMEM, "KOO"); fallthrough; default: _leave(" [error]"); @@ -878,7 +880,7 @@ void afs_send_simple_reply(struct afs_call *call, const void *buf, size_t len) if (n == -ENOMEM) { _debug("oom"); rxrpc_kernel_abort_call(net->socket, call->rxcall, - RX_USER_ABORT, -ENOMEM, "KOO"); + RXGEN_SS_MARSHAL, -ENOMEM, "KOO"); } _leave(" [error]"); } diff --git a/net/rxrpc/call_event.c b/net/rxrpc/call_event.c index 22e05de5d1ca..e426f6831aab 100644 --- a/net/rxrpc/call_event.c +++ b/net/rxrpc/call_event.c @@ -377,9 +377,9 @@ void rxrpc_process_call(struct work_struct *work) if (test_bit(RXRPC_CALL_RX_HEARD, &call->flags) && (int)call->conn->hi_serial - (int)call->rx_serial > 0) { trace_rxrpc_call_reset(call); - rxrpc_abort_call("EXP", call, 0, RX_USER_ABORT, -ECONNRESET); + rxrpc_abort_call("EXP", call, 0, RX_CALL_DEAD, -ECONNRESET); } else { - rxrpc_abort_call("EXP", call, 0, RX_USER_ABORT, -ETIME); + rxrpc_abort_call("EXP", call, 0, RX_CALL_TIMEOUT, -ETIME); } set_bit(RXRPC_CALL_EV_ABORT, &call->events); goto recheck_state; diff --git a/net/rxrpc/conn_object.c b/net/rxrpc/conn_object.c index 03c7f2269151..22089e37e97f 100644 --- a/net/rxrpc/conn_object.c +++ b/net/rxrpc/conn_object.c @@ -183,7 +183,7 @@ void __rxrpc_disconnect_call(struct rxrpc_connection *conn, chan->last_type = RXRPC_PACKET_TYPE_ABORT; break; default: - chan->last_abort = RX_USER_ABORT; + chan->last_abort = RX_CALL_DEAD; chan->last_type = RXRPC_PACKET_TYPE_ABORT; break; }