From patchwork Thu Mar 28 16:57:58 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: David Howells X-Patchwork-Id: 13609161 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 EED6C1327E2 for ; Thu, 28 Mar 2024 17:00:02 +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=1711645204; cv=none; b=Ms7ZP4nM4xOR4aKPdRGyFr1OQGJVk4Xls5bBovxKCD+WNXEkcC7sJ/Uxj0HZsdWcbaLqigs7Ik7oYZ2PIW9Y0o0hEMk1YX2HOwwiSmYzSbq9B/DTcX9Y0QXpyIlWuFdbhpGRTNBD4exrAyRn7H+LAMYsHD/B+ThokHBLOamrjvk= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1711645204; c=relaxed/simple; bh=lViBTFxW094B27mO0CNb4JcXxIC1M1VJ7XSGfavhzeI=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=oxoixEPXt3rzBUW5mnJG3h38/3a/qvwQ8LTmRmYzaujJvkKPITgQzjiBpROUrq3OEYYsVeCU9sJw9j7agxHlNh9enaZj9RhYtJg/yPVwyoVmPyK+z0M7Vm3mwjy9jG5bSQkiKtzAPg22WTn2OD0Uo7He8LsKS2VGwog/9u5wqPQ= 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=eotvQFTi; 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="eotvQFTi" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1711645202; 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=koZtPsH7hhKYp0dfXQczx6sKrVXjOZT1GIZj0qwvbyc=; b=eotvQFTiRTT6AfUIhRrZ2749jXsW5yxUJWglJB5fUU6/zvZl579s7ziCUPqisb8sM4D91W 6MIovI+49tAlvS26SW58DhfFLgTsg1LugLKas9N2A0qX9akNITDAx9SqINDgxjKviN6Mw6 qxLEq5aYzs8PQdPCDpPdoe1t0cqaFQg= Received: from mimecast-mx02.redhat.com (mx-ext.redhat.com [66.187.233.73]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-270-x0mgGlrpM3uifVCi1HPq0w-1; Thu, 28 Mar 2024 12:59:55 -0400 X-MC-Unique: x0mgGlrpM3uifVCi1HPq0w-1 Received: from smtp.corp.redhat.com (int-mx06.intmail.prod.int.rdu2.redhat.com [10.11.54.6]) (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 F0E5A28EC106; Thu, 28 Mar 2024 16:59:54 +0000 (UTC) Received: from warthog.procyon.org.com (unknown [10.42.28.146]) by smtp.corp.redhat.com (Postfix) with ESMTP id F01722166B31; Thu, 28 Mar 2024 16:59:52 +0000 (UTC) From: David Howells To: Steve French Cc: David Howells , Jeff Layton , Matthew Wilcox , Paulo Alcantara , Shyam Prasad N , Tom Talpey , Christian Brauner , netfs@lists.linux.dev, linux-cifs@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-mm@kvack.org, netdev@vger.kernel.org, linux-kernel@vger.kernel.org, Steve French , Shyam Prasad N , Rohith Surabattula Subject: [PATCH v6 07/15] cifs: Set zero_point in the copy_file_range() and remap_file_range() Date: Thu, 28 Mar 2024 16:57:58 +0000 Message-ID: <20240328165845.2782259-8-dhowells@redhat.com> In-Reply-To: <20240328165845.2782259-1-dhowells@redhat.com> References: <20240328165845.2782259-1-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 10.11.54.6 Set zero_point in the copy_file_range() and remap_file_range() implementations so that we don't skip reading data modified on a server-side copy. Signed-off-by: David Howells cc: Steve French cc: Shyam Prasad N cc: Rohith Surabattula cc: Jeff Layton cc: linux-cifs@vger.kernel.org cc: netfs@lists.linux.dev cc: linux-fsdevel@vger.kernel.org cc: linux-mm@kvack.org --- fs/smb/client/cifsfs.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/fs/smb/client/cifsfs.c b/fs/smb/client/cifsfs.c index e01ba9f8706a..2dd29663dab1 100644 --- a/fs/smb/client/cifsfs.c +++ b/fs/smb/client/cifsfs.c @@ -1283,6 +1283,8 @@ static loff_t cifs_remap_file_range(struct file *src_file, loff_t off, rc = cifs_flush_folio(target_inode, destend, &fstart, &fend, false); if (rc) goto unlock; + if (fend > target_cifsi->netfs.zero_point) + target_cifsi->netfs.zero_point = fend + 1; /* Discard all the folios that overlap the destination region. */ cifs_dbg(FYI, "about to discard pages %llx-%llx\n", fstart, fend); @@ -1301,6 +1303,8 @@ static loff_t cifs_remap_file_range(struct file *src_file, loff_t off, fscache_resize_cookie(cifs_inode_cookie(target_inode), new_size); } + if (rc == 0 && new_size > target_cifsi->netfs.zero_point) + target_cifsi->netfs.zero_point = new_size; } /* force revalidate of size and timestamps of target file now @@ -1392,6 +1396,8 @@ ssize_t cifs_file_copychunk_range(unsigned int xid, rc = cifs_flush_folio(target_inode, destend, &fstart, &fend, false); if (rc) goto unlock; + if (fend > target_cifsi->netfs.zero_point) + target_cifsi->netfs.zero_point = fend + 1; /* Discard all the folios that overlap the destination region. */ truncate_inode_pages_range(&target_inode->i_data, fstart, fend);