From patchwork Thu Jun 20 17:31:28 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: David Howells X-Patchwork-Id: 13705963 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.133.124]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 8B9F91B9AB7 for ; Thu, 20 Jun 2024 17:33:18 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=170.10.133.124 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1718904800; cv=none; b=Pw4Uq7zrnnzdg8fF/NeIZVvRIZnQ+FGzV5rH5uSbmwV6Z63irgewGvNb5sTxBeKtNh8xsXsa0dtcRwWT9kLqpHdYPYsaLWTxsNKl1deC/6GJvRtIzBOS7wPR46ZwKWz8TT45c3jYmKPA3/I1yiQ66KTz+I8PZWOhGmliWs51VCU= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1718904800; c=relaxed/simple; bh=2p9kWBbTHfnvBQ8i8TFWcwLEKkJ12Z5z63HjOwGkKNc=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=jF81zh7wGfkfC0GkdbzwxbLVll3g3XMNojq34J3KtplDXJxLRPCO8HNwDhqDagI6CPS47TJilm18drI5Aqq9X9mscn04/OoqhaK4v74cqpJkdmpmtSwMzPoNDvKei5onvHXgzDpBOfs+q4yiiHR1HEKCnlM4M+NcCyhez5Pz5O8= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=redhat.com; spf=pass smtp.mailfrom=redhat.com; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b=CZgv8SP1; arc=none smtp.client-ip=170.10.133.124 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=redhat.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=redhat.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="CZgv8SP1" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1718904797; 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=tcCzhA8XUd6wWPEL49ATAv4+dcrLDrKKLcUOQlZf5aE=; b=CZgv8SP1FBS5+n3uZKQrJS89tX90f9h31puu3T/MzFzbme6Y6aPUN6+D6mrvzF/cJH/2wA 2LwFMEKcNSB7qaeXqfehzdvoIbgNFBc/ecrzwaKhafKZebQc/Otc3Tprsz/LAmSJ4y/UR7 jbYwMs6xIm4ZFikAkp1hhXm9SP3CANw= Received: from mx-prod-mc-05.mail-002.prod.us-west-2.aws.redhat.com (ec2-54-186-198-63.us-west-2.compute.amazonaws.com [54.186.198.63]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-694-dzyJCI2LOGq-cKgSo75gZA-1; Thu, 20 Jun 2024 13:33:14 -0400 X-MC-Unique: dzyJCI2LOGq-cKgSo75gZA-1 Received: from mx-prod-int-01.mail-002.prod.us-west-2.aws.redhat.com (mx-prod-int-01.mail-002.prod.us-west-2.aws.redhat.com [10.30.177.4]) (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 mx-prod-mc-05.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTPS id E57F51956087; Thu, 20 Jun 2024 17:33:10 +0000 (UTC) Received: from warthog.procyon.org.com (unknown [10.39.195.156]) by mx-prod-int-01.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTP id B52743000602; Thu, 20 Jun 2024 17:33:04 +0000 (UTC) From: David Howells To: Christian Brauner , Steve French , Matthew Wilcox Cc: David Howells , Jeff Layton , Gao Xiang , Dominique Martinet , Marc Dionne , Paulo Alcantara , Shyam Prasad N , Tom Talpey , Eric Van Hensbergen , Ilya Dryomov , netfs@lists.linux.dev, linux-afs@lists.infradead.org, linux-cifs@vger.kernel.org, linux-nfs@vger.kernel.org, ceph-devel@vger.kernel.org, v9fs@lists.linux.dev, linux-erofs@lists.ozlabs.org, linux-fsdevel@vger.kernel.org, linux-mm@kvack.org, netdev@vger.kernel.org, linux-kernel@vger.kernel.org, Steve French Subject: [PATCH 10/17] cifs: Only pick a channel once per read request Date: Thu, 20 Jun 2024 18:31:28 +0100 Message-ID: <20240620173137.610345-11-dhowells@redhat.com> In-Reply-To: <20240620173137.610345-1-dhowells@redhat.com> References: <20240620173137.610345-1-dhowells@redhat.com> Precedence: bulk X-Mailing-List: linux-fsdevel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Scanned-By: MIMEDefang 3.4.1 on 10.30.177.4 In cifs, only pick a channel when setting up a read request rather than doing so individually for every subrequest and instead use that channel for all. This mirrors what the code in v6.9 does. Signed-off-by: David Howells cc: Steve French cc: Paulo Alcantara cc: Jeff Layton cc: linux-cifs@vger.kernel.org cc: netfs@lists.linux.dev cc: linux-fsdevel@vger.kernel.org --- fs/smb/client/cifsglob.h | 1 + fs/smb/client/file.c | 14 +++----------- 2 files changed, 4 insertions(+), 11 deletions(-) diff --git a/fs/smb/client/cifsglob.h b/fs/smb/client/cifsglob.h index 4b00512fb9f9..b48d3f5e8889 100644 --- a/fs/smb/client/cifsglob.h +++ b/fs/smb/client/cifsglob.h @@ -1494,6 +1494,7 @@ struct cifs_aio_ctx { struct cifs_io_request { struct netfs_io_request rreq; struct cifsFileInfo *cfile; + struct TCP_Server_Info *server; }; /* asynchronous read support */ diff --git a/fs/smb/client/file.c b/fs/smb/client/file.c index 67dd8fcd0e6d..16fa1ac1ed2d 100644 --- a/fs/smb/client/file.c +++ b/fs/smb/client/file.c @@ -134,17 +134,15 @@ static void cifs_issue_write(struct netfs_io_subrequest *subreq) static bool cifs_clamp_length(struct netfs_io_subrequest *subreq) { struct netfs_io_request *rreq = subreq->rreq; - struct TCP_Server_Info *server; struct cifs_io_subrequest *rdata = container_of(subreq, struct cifs_io_subrequest, subreq); struct cifs_io_request *req = container_of(subreq->rreq, struct cifs_io_request, rreq); + struct TCP_Server_Info *server = req->server; struct cifs_sb_info *cifs_sb = CIFS_SB(rreq->inode->i_sb); size_t rsize = 0; int rc; rdata->xid = get_xid(); rdata->have_xid = true; - - server = cifs_pick_channel(tlink_tcon(req->cfile->tlink)->ses); rdata->server = server; if (cifs_sb->ctx->rsize == 0) @@ -203,14 +201,7 @@ static void cifs_req_issue_read(struct netfs_io_subrequest *subreq) __set_bit(NETFS_SREQ_CLEAR_TAIL, &subreq->flags); rdata->pid = pid; - rc = adjust_credits(rdata->server, &rdata->credits, rdata->subreq.len); - if (!rc) { - if (rdata->req->cfile->invalidHandle) - rc = -EAGAIN; - else - rc = rdata->server->ops->async_readv(rdata); - } - + rc = rdata->server->ops->async_readv(rdata); out: if (rc) netfs_subreq_terminated(subreq, rc, false); @@ -250,6 +241,7 @@ static int cifs_init_request(struct netfs_io_request *rreq, struct file *file) open_file = file->private_data; rreq->netfs_priv = file->private_data; req->cfile = cifsFileInfo_get(open_file); + req->server = cifs_pick_channel(tlink_tcon(req->cfile->tlink)->ses); } else if (rreq->origin != NETFS_WRITEBACK) { WARN_ON_ONCE(1); return -EIO;