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 <jeff.liu@xxxxxxxxxx> Cc: Alexander Viro <viro@xxxxxxxxxxxxxxxxxx> Cc: Andreas Dilger <adilger@xxxxxxxxx> Cc: Dave Chinner <david@xxxxxxxxxxxxx> Cc: Mark Fasheh <mfasheh@xxxxxxxx> Cc: Joel Becker <jlbec@xxxxxxxxxxxx> Cc: Jan Kara <jack@xxxxxxx> Cc: Chris Mason <chris.mason@xxxxxxxxxxxx> Cc: Christoph Hellwig <hch@xxxxxxxxxxxxx> --- 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 -- To unsubscribe from this list: send the line "unsubscribe linux-fsdevel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
