Discussing this on another thread, but officially I'll NAK this here. Joel On Wed, Feb 20, 2013 at 11:59:29AM +0800, Jeff Liu wrote: > 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 -- Life's Little Instruction Book #306 "Take a nap on Sunday afternoons." http://www.jlbec.org/ jlbec@xxxxxxxxxxxx -- 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
