From patchwork Mon Dec 4 14:01:59 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: David Howells X-Patchwork-Id: 13478489 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="Js3gTNA0" 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 D2D3190 for ; Mon, 4 Dec 2023 06:02:43 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1701698563; 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; bh=P1gifRJOo6LAX3L9+qffyHKYdps0XhxXC9y8grgMIB8=; b=Js3gTNA0CcERwHdhNBRIi8zw+RiEL+0gUasGonemV1L0EdbiSFKkFtVUaPAasyf/FFXFzt y45mh5ieTNFwh6prp+DijDcwpgjl/sq35smEV5m6F7XyIs0NpKvJgHKldJClOaoAQJtb2g kgwqBnVXCR8XbgEGrbE32+xSltO+u6k= 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-199-yPxiSqXGPyamQt2Z2R0ZKA-1; Mon, 04 Dec 2023 09:02:36 -0500 X-MC-Unique: yPxiSqXGPyamQt2Z2R0ZKA-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 4F3623C11C71; Mon, 4 Dec 2023 14:02:01 +0000 (UTC) Received: from warthog.procyon.org.uk (unknown [10.42.28.161]) by smtp.corp.redhat.com (Postfix) with ESMTP id B4F05C1290F; Mon, 4 Dec 2023 14:01:59 +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 From: David Howells To: Steve French cc: dhowells@redhat.com, Dave Chinner , Xiaoli Feng , Shyam Prasad N , Rohith Surabattula , Jeff Layton , Darrick Wong , fstests@vger.kernel.org, linux-cifs@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH] cifs: Fix non-availability of dedup breaking generic/304 Precedence: bulk X-Mailing-List: linux-cifs@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-ID: <250052.1701698519.1@warthog.procyon.org.uk> Date: Mon, 04 Dec 2023 14:01:59 +0000 Message-ID: <250053.1701698519@warthog.procyon.org.uk> X-Scanned-By: MIMEDefang 3.4.1 on 10.11.54.8 Deduplication isn't supported on cifs, but cifs doesn't reject it, instead treating it as extent duplication/cloning. This can cause generic/304 to go silly and run for hours on end. Fix cifs to indicate EOPNOTSUPP if REMAP_FILE_DEDUP is set in ->remap_file_range(). Note that it's unclear whether or not commit b073a08016a1 is meant to cause cifs to return an error if REMAP_FILE_DEDUP. Fixes: b073a08016a1 ("cifs: fix that return -EINVAL when do dedupe operation") Suggested-by: Dave Chinner cc: Steve French cc: Xiaoli Feng cc: Shyam Prasad N cc: Rohith Surabattula cc: Jeff Layton cc: Darrick Wong cc: fstests@vger.kernel.org cc: linux-cifs@vger.kernel.org cc: linux-fsdevel@vger.kernel.org Link: https://lore.kernel.org/r/3876191.1701555260@warthog.procyon.org.uk/ Reviewed-by: Dave Chinner --- fs/smb/client/cifsfs.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/fs/smb/client/cifsfs.c b/fs/smb/client/cifsfs.c index 4d8927b57776..96a65cf9b5ec 100644 --- a/fs/smb/client/cifsfs.c +++ b/fs/smb/client/cifsfs.c @@ -1276,7 +1276,9 @@ static loff_t cifs_remap_file_range(struct file *src_file, loff_t off, unsigned int xid; int rc; - if (remap_flags & ~(REMAP_FILE_DEDUP | REMAP_FILE_ADVISORY)) + if (remap_flags & REMAP_FILE_DEDUP) + return -EOPNOTSUPP; + if (remap_flags & ~REMAP_FILE_ADVISORY) return -EINVAL; cifs_dbg(FYI, "clone range\n");