From patchwork Wed Aug 28 21:02:44 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: David Howells X-Patchwork-Id: 13781976 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 73A5A1AD400 for ; Wed, 28 Aug 2024 21:03:28 +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=1724879009; cv=none; b=TlWTEZ7IP90y5pNIYgcaAOH3LNx9sbwU28I7UrYCajD/EWZC+eZQiv1mpI6ehg3p6JvDfwqclvCv6qDm3gl5Mr9DkyJ1h8okRwiT9iQRtogEnqBYowuzcAAsNwbzYRwU0vvxwwr5OV0ZQwb3DbZoMrkkCDLThSbIiR4ChQ9zN+k= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1724879009; c=relaxed/simple; bh=vV14LkLlJc5C8XMmAWqSUEreXBiRwT8flr5r5K1CT0k=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=FhthCG54oSqcXGhwkLBs3sy9cfJlc7DVshrQlmrlQMNs+T9ba/bSxuuOzmMy6J7tpU1va7JZ+guDcvCOD1u/SR6hUpeJgPhkQ9r8DCNmlhLC0hkRlr/ejNBt+2utzvPSrSyUn664muYhe1tsRtKe8ACuvuHa3I7IQSZgsDutI6E= 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=UQP4RqFT; 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="UQP4RqFT" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1724879007; 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=29rNMGcbzhhOXDnkGZZqENHeVIOwTy/JkQWfMjJEQZk=; b=UQP4RqFTR76c/OHdYgdQnAcRt7gxPvetQSF0PaUH7SDvdbREzQTrM2nISSPfXD+CvIot7M iMqha0zuLikwtcASkJ40S6U071aG5um+CImIv/b3/EGhsXRfwoxtfI4V+opV2BkRSGjcgJ E9cyz6i0+Xc43wjk/kxZ7zsFBbLfZ1U= Received: from mx-prod-mc-04.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-62-Gp7aQV_ZPh6R-b_4tg_Akg-1; Wed, 28 Aug 2024 17:03:24 -0400 X-MC-Unique: Gp7aQV_ZPh6R-b_4tg_Akg-1 Received: from mx-prod-int-02.mail-002.prod.us-west-2.aws.redhat.com (mx-prod-int-02.mail-002.prod.us-west-2.aws.redhat.com [10.30.177.15]) (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-04.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTPS id 30BFC19560B7; Wed, 28 Aug 2024 21:03:21 +0000 (UTC) Received: from warthog.procyon.org.com (unknown [10.42.28.30]) by mx-prod-int-02.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTP id B57471955F1B; Wed, 28 Aug 2024 21:03:15 +0000 (UTC) From: David Howells To: Christian Brauner , Steve French Cc: David Howells , Paulo Alcantara , Tom Talpey , Dominique Martinet , Jeff Layton , Matthew Wilcox , 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, linux-kernel@vger.kernel.org, Steve French , Shyam Prasad N , Rohith Surabattula Subject: [PATCH 3/6] cifs: Fix copy offload to flush destination region Date: Wed, 28 Aug 2024 22:02:44 +0100 Message-ID: <20240828210249.1078637-4-dhowells@redhat.com> In-Reply-To: <20240828210249.1078637-1-dhowells@redhat.com> References: <20240828210249.1078637-1-dhowells@redhat.com> Precedence: bulk X-Mailing-List: linux-cifs@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Scanned-By: MIMEDefang 3.0 on 10.30.177.15 Fix cifs_file_copychunk_range() to flush the destination region before invalidating it to avoid potential loss of data should the copy fail, in whole or in part, in some way. Fixes: 7b2404a886f8 ("cifs: Fix flushing, invalidation and file size with copy_file_range()") Signed-off-by: David Howells cc: Steve French cc: Paulo Alcantara cc: Shyam Prasad N cc: Rohith Surabattula cc: Matthew Wilcox cc: Jeff Layton cc: linux-cifs@vger.kernel.org cc: linux-mm@kvack.org cc: linux-fsdevel@vger.kernel.org --- fs/smb/client/cifsfs.c | 21 ++++----------------- 1 file changed, 4 insertions(+), 17 deletions(-) diff --git a/fs/smb/client/cifsfs.c b/fs/smb/client/cifsfs.c index d89485235425..2a2523c93944 100644 --- a/fs/smb/client/cifsfs.c +++ b/fs/smb/client/cifsfs.c @@ -1341,7 +1341,6 @@ ssize_t cifs_file_copychunk_range(unsigned int xid, struct cifsFileInfo *smb_file_target; struct cifs_tcon *src_tcon; struct cifs_tcon *target_tcon; - unsigned long long destend, fstart, fend; ssize_t rc; cifs_dbg(FYI, "copychunk range\n"); @@ -1391,25 +1390,13 @@ ssize_t cifs_file_copychunk_range(unsigned int xid, goto unlock; } - destend = destoff + len - 1; - - /* Flush the folios at either end of the destination range to prevent - * accidental loss of dirty data outside of the range. + /* Flush and invalidate all the folios in the destination region. If + * the copy was successful, then some of the flush is extra overhead, + * but we need to allow for the copy failing in some way (eg. ENOSPC). */ - fstart = destoff; - fend = destend; - - rc = cifs_flush_folio(target_inode, destoff, &fstart, &fend, true); + rc = filemap_invalidate_inode(target_inode, true, destoff, destoff + len - 1); if (rc) goto unlock; - 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); fscache_invalidate(cifs_inode_cookie(target_inode), NULL, i_size_read(target_inode), 0);