2018-09-14 14:51:12

by Toshi Kani

Subject: [PATCH v2 1/3] ext4, dax: add ext4_bmap to ext4_dax_aops

Ext4 mount path calls .bmap to the journal inode. This currently
works for the DAX mount case because ext4_iget() always set
'ext4_da_aops' to any regular files.

In preparation to fix ext4_iget() to set 'ext4_dax_aops' for ext4
DAX files, add ext4_bmap() to 'ext4_dax_aops'. .bmap works for
DAX inodes. [1]

[1]: https://lkml.org/lkml/2018/9/12/803
Fixes: 5f0663bb4a64 ("ext4, dax: introduce ext4_dax_aops")
Signed-off-by: Toshi Kani <[email protected]>
Suggested-by: Jan Kara <[email protected]>
Cc: Jan Kara <[email protected]>
Cc: Dan Williams <[email protected]>
Cc: "Theodore Ts'o" <[email protected]>
Cc: Andreas Dilger <[email protected]>
Cc: <[email protected]>
---
fs/ext4/inode.c | 1 +
1 file changed, 1 insertion(+)

diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c
index d0dd585add6a..e4acaa980467 100644
--- a/fs/ext4/inode.c
+++ b/fs/ext4/inode.c
@@ -3948,6 +3948,7 @@ static const struct address_space_operations ext4_dax_aops = {
.writepages = ext4_dax_writepages,
.direct_IO = noop_direct_IO,
.set_page_dirty = noop_set_page_dirty,
+ .bmap = ext4_bmap,
.invalidatepage = noop_invalidatepage,
};

2018-09-16 01:32:31

by Theodore Ts'o

Subject: Re: [PATCH v2 1/3] ext4, dax: add ext4_bmap to ext4_dax_aops

On Fri, Sep 14, 2018 at 08:51:12AM -0600, Toshi Kani wrote:
> Ext4 mount path calls .bmap to the journal inode. This currently
> works for the DAX mount case because ext4_iget() always set
> 'ext4_da_aops' to any regular files.
>
> In preparation to fix ext4_iget() to set 'ext4_dax_aops' for ext4
> DAX files, add ext4_bmap() to 'ext4_dax_aops'. .bmap works for
> DAX inodes. [1]
>
> [1]: https://lkml.org/lkml/2018/9/12/803
> Fixes: 5f0663bb4a64 ("ext4, dax: introduce ext4_dax_aops")
> Signed-off-by: Toshi Kani <[email protected]>
> Suggested-by: Jan Kara <[email protected]>
> Cc: Jan Kara <[email protected]>
> Cc: Dan Williams <[email protected]>
> Cc: "Theodore Ts'o" <[email protected]>
> Cc: Andreas Dilger <[email protected]>
> Cc: <[email protected]>

Thanks, applied.

- Ted