From nobody Tue Dec 16 05:41:02 2025 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 E84F1C4332F for ; Thu, 9 Nov 2023 15:43:35 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1343762AbjKIPnf (ORCPT ); Thu, 9 Nov 2023 10:43:35 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:59642 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1344152AbjKIPmm (ORCPT ); Thu, 9 Nov 2023 10:42:42 -0500 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.129.124]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id B44C0384B for ; Thu, 9 Nov 2023 07:41:03 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1699544463; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=0G9cfB/SMcsuQUP6NSXMvLH/gTThJ4V8NgpcMlTJhZ4=; b=bPyOlFtZj7gh4663+9kktUAZYeoYkqTJmJoiyzIN70H1kzIcwmCyQSU4Z+Q+d7FU2+dV7X F5Bpypn+EalY0TKYo2CR2kfrO1dBp62BZEcJav0Fzm5qqwyQfNcef6gckQ0P7Peh9GoOwD W4pAU9Jmm8tsBeRgp76pb49PrcN/+6U= Received: from mimecast-mx02.redhat.com (mimecast-mx02.redhat.com [66.187.233.88]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-167-HMTp9tTqPLOL3nmlbwdPXQ-1; Thu, 09 Nov 2023 10:40:59 -0500 X-MC-Unique: HMTp9tTqPLOL3nmlbwdPXQ-1 Received: from smtp.corp.redhat.com (int-mx08.intmail.prod.int.rdu2.redhat.com [10.11.54.8]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id 5961C185A790; Thu, 9 Nov 2023 15:40:59 +0000 (UTC) Received: from warthog.procyon.org.com (unknown [10.42.28.13]) by smtp.corp.redhat.com (Postfix) with ESMTP id 8C458C0FE05; Thu, 9 Nov 2023 15:40:58 +0000 (UTC) From: David Howells To: Marc Dionne Cc: David Howells , linux-afs@lists.infradead.org, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH 28/41] afs: Dispatch fileserver probes in priority order Date: Thu, 9 Nov 2023 15:39:51 +0000 Message-ID: <20231109154004.3317227-29-dhowells@redhat.com> In-Reply-To: <20231109154004.3317227-1-dhowells@redhat.com> References: <20231109154004.3317227-1-dhowells@redhat.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-Scanned-By: MIMEDefang 3.4.1 on 10.11.54.8 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" When probing all the addresses for a fileserver, dispatch them in order of descending priority to try and get back highest priority one first. Also add a tracepoint to show the transmission and completion of the probes. Signed-off-by: David Howells cc: Marc Dionne cc: linux-afs@lists.infradead.org --- fs/afs/fs_probe.c | 25 +++++++++++++++++++++++-- include/trace/events/afs.h | 33 +++++++++++++++++++++++++++++++++ 2 files changed, 56 insertions(+), 2 deletions(-) diff --git a/fs/afs/fs_probe.c b/fs/afs/fs_probe.c index 8008d3ecabab..c5702698b18b 100644 --- a/fs/afs/fs_probe.c +++ b/fs/afs/fs_probe.c @@ -102,7 +102,7 @@ void afs_fileserver_probe_result(struct afs_call *call) struct afs_address *addr =3D &alist->addrs[call->probe_index]; struct afs_server *server =3D call->server; unsigned int index =3D call->probe_index; - unsigned int rtt_us =3D 0, cap0; + unsigned int rtt_us =3D -1, cap0; int ret =3D call->error; =20 _enter("%pU,%u", &server->uuid, index); @@ -182,6 +182,7 @@ void afs_fileserver_probe_result(struct afs_call *call) out: spin_unlock(&server->probe_lock); =20 + trace_afs_fs_probe(server, false, alist, index, call->error, call->abort_= code, rtt_us); _debug("probe %pU [%u] %pISpc rtt=3D%d ret=3D%d", &server->uuid, index, rxrpc_kernel_remote_addr(alist->addrs[index]= .peer), rtt_us, ret); @@ -207,6 +208,8 @@ void afs_fs_probe_fileserver(struct afs_net *net, struc= t afs_server *server, afs_get_addrlist(alist, afs_alist_trace_get_probe); read_unlock(&server->fs_lock); =20 + afs_get_address_preferences(net, alist); + server->probed_at =3D jiffies; atomic_set(&server->probe_outstanding, all ? alist->nr_addrs : 1); memset(&server->probe, 0, sizeof(server->probe)); @@ -217,10 +220,28 @@ void afs_fs_probe_fileserver(struct afs_net *net, str= uct afs_server *server, all =3D true; =20 if (all) { - for (index =3D 0; index < alist->nr_addrs; index++) + unsigned long unprobed =3D (1UL << alist->nr_addrs) - 1; + unsigned int i; + int best_prio; + + while (unprobed) { + best_prio =3D -1; + index =3D 0; + for (i =3D 0; i < alist->nr_addrs; i++) { + if (test_bit(i, &unprobed) && + alist->addrs[i].prio > best_prio) { + index =3D i; + best_prio =3D alist->addrs[i].prio; + } + } + __clear_bit(index, &unprobed); + + trace_afs_fs_probe(server, true, alist, index, 0, 0, 0); if (!afs_fs_get_capabilities(net, server, alist, index, key)) afs_fs_probe_not_done(net, server, alist, index); + } } else { + trace_afs_fs_probe(server, true, alist, index, 0, 0, 0); if (!afs_fs_get_capabilities(net, server, alist, index, key)) afs_fs_probe_not_done(net, server, alist, index); } diff --git a/include/trace/events/afs.h b/include/trace/events/afs.h index 0f68d67f52c8..81eb87fbcfa7 100644 --- a/include/trace/events/afs.h +++ b/include/trace/events/afs.h @@ -1387,6 +1387,39 @@ TRACE_EVENT(afs_alist, __entry->ref) ); =20 +TRACE_EVENT(afs_fs_probe, + TP_PROTO(struct afs_server *server, bool tx, struct afs_addr_list *al= ist, + unsigned int addr_index, int error, s32 abort_code, unsigned int rt= t_us), + + TP_ARGS(server, tx, alist, addr_index, error, abort_code, rtt_us), + + TP_STRUCT__entry( + __field(unsigned int, server) + __field(bool, tx) + __field(u16, addr_index) + __field(short, error) + __field(s32, abort_code) + __field(unsigned int, rtt_us) + __field_struct(struct sockaddr_rxrpc, srx) + ), + + TP_fast_assign( + __entry->server =3D server->debug_id; + __entry->tx =3D tx; + __entry->addr_index =3D addr_index; + __entry->error =3D error; + __entry->abort_code =3D abort_code; + __entry->rtt_us =3D rtt_us; + memcpy(&__entry->srx, rxrpc_kernel_remote_srx(alist->addrs[addr_inde= x].peer), + sizeof(__entry->srx)); + ), + + TP_printk("s=3D%08x %s ax=3D%u e=3D%d ac=3D%d rtt=3D%d %pISpc", + __entry->server, __entry->tx ? "tx" : "rx", __entry->addr_index, + __entry->error, __entry->abort_code, __entry->rtt_us, + &__entry->srx.transport) + ); + #endif /* _TRACE_AFS_H */ =20 /* This part must be outside protection */