From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jeff Liu Subject: [RFC PATCH 3/3] ocfs2: only return the shared extents if FIEMAP_FLAG_COW is set Date: Wed, 20 Feb 2013 11:59:29 +0800 Message-ID: <51244A21.5090601@oracle.com> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Cc: "linux-fsdevel@vger.kernel.org" , "viro@zeniv.linux.org.uk" , Andreas Dilger , Dave Chinner , Mark Fasheh , Joel Becker , Jan Kara , Chris Mason , Christoph Hellwig To: ocfs2-devel@oss.oracle.com Return-path: Received: from userp1040.oracle.com ([156.151.31.81]:32885 "EHLO userp1040.oracle.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S934913Ab3BTEAq (ORCPT ); Tue, 19 Feb 2013 23:00:46 -0500 Sender: linux-fsdevel-owner@vger.kernel.org List-ID: Teach OCFS2 to be aware of FIEMAP_FLAG_COW - fill the extent map array with those extents that have OCFS2_EXT_REFCOUNTED in rec.re_flags. Signed-off-by: Jie Liu Cc: Alexander Viro Cc: Andreas Dilger Cc: Dave Chinner Cc: Mark Fasheh Cc: Joel Becker Cc: Jan Kara Cc: Chris Mason Cc: Christoph Hellwig --- fs/ocfs2/extent_map.c | 11 ++++++++++- 1 file changed, 10 insertions(+), 1 deletion(-) diff --git a/fs/ocfs2/extent_map.c b/fs/ocfs2/extent_map.c index f487aa3..1eaae3f 100644 --- a/fs/ocfs2/extent_map.c +++ b/fs/ocfs2/extent_map.c @@ -745,7 +745,7 @@ static int ocfs2_fiemap_inline(struct inode *inode, struct buffer_head *di_bh, return 0; } -#define OCFS2_FIEMAP_FLAGS (FIEMAP_FLAG_SYNC) +#define OCFS2_FIEMAP_FLAGS (FIEMAP_FLAG_SYNC | FIEMAP_FLAG_COW) int ocfs2_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo, u64 map_start, u64 map_len) @@ -810,11 +810,20 @@ int ocfs2_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo, phys_bytes = le64_to_cpu(rec.e_blkno) << osb->sb->s_blocksize_bits; virt_bytes = (u64)le32_to_cpu(rec.e_cpos) << osb->s_clustersize_bits; + /* + * If the FIEMAP_FLAG_COW is set, fill the fiemap_extent array + * with the extents in copy-on-write state only. + */ + if ((fieinfo->fi_flags & FIEMAP_FLAG_COW) && + !(fe_flags & FIEMAP_EXTENT_SHARED)) + goto next_map; + ret = fiemap_fill_next_extent(fieinfo, virt_bytes, phys_bytes, len_bytes, fe_flags); if (ret) break; +next_map: cpos = le32_to_cpu(rec.e_cpos)+ le16_to_cpu(rec.e_leaf_clusters); } -- 1.7.9.5