diff options
| author | Ross Zwisler <ross.zwisler@linux.intel.com> | 2016-11-08 01:30:58 +0100 |
|---|---|---|
| committer | Dave Chinner <david@fromorbit.com> | 2016-11-08 01:30:58 +0100 |
| commit | 547edce3ba234a5161c6e1f4389f4a0d2f8451aa (patch) | |
| tree | dfee44529cd29dd8feb3aff0426e5370db206a99 /fs/ext4 | |
| parent | Linux 4.9-rc1 (diff) | |
| download | linux-547edce3ba234a5161c6e1f4389f4a0d2f8451aa.tar.xz linux-547edce3ba234a5161c6e1f4389f4a0d2f8451aa.zip | |
ext4: tell DAX the size of allocation holes
When DAX calls _ext4_get_block() and the file offset points to a hole we
currently don't set bh->b_size. This is current worked around via
buffer_size_valid() in fs/dax.c.
_ext4_get_block() has the hole size information from ext4_map_blocks(), so
populate bh->b_size so we can remove buffer_size_valid() in a later patch.
Signed-off-by: Ross Zwisler <ross.zwisler@linux.intel.com>
Reviewed-by: Jan Kara <jack@suse.cz>
Signed-off-by: Dave Chinner <david@fromorbit.com>
Diffstat (limited to 'fs/ext4')
| -rw-r--r-- | fs/ext4/inode.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c index 9c064727ed62..3d58b2b477e8 100644 --- a/fs/ext4/inode.c +++ b/fs/ext4/inode.c @@ -767,6 +767,9 @@ static int _ext4_get_block(struct inode *inode, sector_t iblock, ext4_update_bh_state(bh, map.m_flags); bh->b_size = inode->i_sb->s_blocksize * map.m_len; ret = 0; + } else if (ret == 0) { + /* hole case, need to fill in bh->b_size */ + bh->b_size = inode->i_sb->s_blocksize * map.m_len; } return ret; } |