Re: [PATCH v4 08/25] iomap: obtain fsverity info for read path

["Darrick J. Wong" <djwong@kernel.org>]

On Mon, Mar 09, 2026 at 08:23:23PM +0100, Andrey Albershteyn wrote:
> Obtain fsverity info for folios with file data. Filesystem can pass vi
> down to ioend and then to fsverity for verification. XFS will use it in
> further patch for fsverity integration.
> 
> Signed-off-by: Andrey Albershteyn <aalbersh@kernel.org>

Looks good to me,
Reviewed-by: "Darrick J. Wong" <djwong@kernel.org>

--D

> ---
>  fs/iomap/buffered-io.c | 7 +++++++
>  include/linux/iomap.h  | 2 ++
>  2 files changed, 9 insertions(+)
> 
> diff --git a/fs/iomap/buffered-io.c b/fs/iomap/buffered-io.c
> index 530794dcdd91..a335a18c307f 100644
> --- a/fs/iomap/buffered-io.c
> +++ b/fs/iomap/buffered-io.c
> @@ -9,6 +9,7 @@
>  #include <linux/swap.h>
>  #include <linux/migrate.h>
>  #include <linux/fserror.h>
> +#include <linux/fsverity.h>
>  #include "internal.h"
>  #include "trace.h"
>  
> @@ -590,6 +591,9 @@ void iomap_read_folio(const struct iomap_ops *ops,
>  
>  	trace_iomap_readpage(iter.inode, 1);
>  
> +	if (iter.pos < i_size_read(iter.inode))
> +		ctx->vi = fsverity_get_info(iter.inode);
> +
>  	while ((ret = iomap_iter(&iter, ops)) > 0)
>  		iter.status = iomap_read_folio_iter(&iter, ctx,
>  				&bytes_submitted);
> @@ -656,6 +660,9 @@ void iomap_readahead(const struct iomap_ops *ops,
>  
>  	trace_iomap_readahead(rac->mapping->host, readahead_count(rac));
>  
> +	if (iter.pos < i_size_read(iter.inode))
> +		ctx->vi = fsverity_get_info(iter.inode);
> +
>  	while (iomap_iter(&iter, ops) > 0)
>  		iter.status = iomap_readahead_iter(&iter, ctx,
>  					&cur_bytes_submitted);
> diff --git a/include/linux/iomap.h b/include/linux/iomap.h
> index dc39837b0d45..89e5a7abc012 100644
> --- a/include/linux/iomap.h
> +++ b/include/linux/iomap.h
> @@ -432,6 +432,7 @@ struct iomap_ioend {
>  	loff_t			io_offset;	/* offset in the file */
>  	sector_t		io_sector;	/* start sector of ioend */
>  	void			*io_private;	/* file system private data */
> +	struct fsverity_info	*io_vi;		/* fsverity info */
>  	struct bio		io_bio;		/* MUST BE LAST! */
>  };
>  
> @@ -506,6 +507,7 @@ struct iomap_read_folio_ctx {
>  	struct readahead_control *rac;
>  	void			*read_ctx;
>  	loff_t			read_ctx_file_offset;
> +	struct fsverity_info	*vi;
>  };
>  
>  struct iomap_read_ops {
> -- 
> 2.51.2
> 
>