From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-pf0-f196.google.com ([209.85.192.196]:34104 "EHLO mail-pf0-f196.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751293AbeEPRyX (ORCPT ); Wed, 16 May 2018 13:54:23 -0400 Received: by mail-pf0-f196.google.com with SMTP id a14-v6so737987pfi.1 for ; Wed, 16 May 2018 10:54:23 -0700 (PDT) From: Omar Sandoval To: "Darrick J . Wong" , linux-xfs@vger.kernel.org Cc: linux-fsdevel@vger.kernel.org, Jan Kara , Christoph Hellwig , Aleksei Besogonov , kernel-team@fb.com Subject: [PATCH v3 2/2] iomap: don't allow holes in swapfiles Date: Wed, 16 May 2018 10:54:11 -0700 Message-Id: In-Reply-To: References: In-Reply-To: References: Sender: linux-fsdevel-owner@vger.kernel.org List-ID: From: Omar Sandoval generic_swapfile_activate() doesn't allow holes, so we should be consistent here. This is also a bit safer: if the user creates a swapfile with, say, truncate -s $SIZE followed by mkswap, they should really get an error and not much less swap space than they expected. swapon(8) will error out before calling swapon(2) if the file has holes, anyways. Fixes: 9d93388b0afe ("iomap: add a swapfile activation function") Reviewed-by: Darrick J. Wong Signed-off-by: Omar Sandoval --- fs/iomap.c | 5 ----- 1 file changed, 5 deletions(-) diff --git a/fs/iomap.c b/fs/iomap.c index 89517442e296..f2456d0d8ddd 100644 --- a/fs/iomap.c +++ b/fs/iomap.c @@ -1220,10 +1220,6 @@ static loff_t iomap_swapfile_activate_actor(struct inode *inode, loff_t pos, return -EINVAL; } - /* Skip holes. */ - if (iomap->type == IOMAP_HOLE) - goto out; - /* Only real or unwritten extents. */ if (iomap->type != IOMAP_MAPPED && iomap->type != IOMAP_UNWRITTEN) { pr_err("swapon: file has unallocated extents\n"); @@ -1259,7 +1255,6 @@ static loff_t iomap_swapfile_activate_actor(struct inode *inode, loff_t pos, return error; memcpy(&isi->iomap, iomap, sizeof(isi->iomap)); } -out: return count; } -- 2.17.0