Commit 10783d0b authored by Anuj Gupta's avatar Anuj Gupta Committed by Jens Axboe
Browse files

fs, iov_iter: define meta io descriptor 



Add flags to describe checks for integrity meta buffer. Also, introduce
a  new 'uio_meta' structure that upper layer can use to pass the
meta/integrity information.

Signed-off-by: default avatarKanchan Joshi <joshi.k@samsung.com>
Signed-off-by: default avatarAnuj Gupta <anuj20.g@samsung.com>
Reviewed-by: default avatarChristoph Hellwig <hch@lst.de>
Link: https://lore.kernel.org/r/20241128112240.8867-5-anuj20.g@samsung.com


Signed-off-by: default avatarJens Axboe <axboe@kernel.dk>
parent fe8f4ca7

include/linux/uio.h

+9 −0
Original line number Diff line number Diff line
@@ -82,6 +82,15 @@ struct iov_iter { 
	};

};



typedef __u16 uio_meta_flags_t;



struct uio_meta {

	uio_meta_flags_t	flags;

	u16			app_tag;

	u64			seed;

	struct iov_iter		iter;

};



static inline const struct iovec *iter_iov(const struct iov_iter *iter)

{

	if (iter->iter_type == ITER_UBUF)

include/uapi/linux/fs.h

+9 −0
Original line number Diff line number Diff line
@@ -40,6 +40,15 @@ 
#define BLOCK_SIZE_BITS 10

#define BLOCK_SIZE (1<<BLOCK_SIZE_BITS)



/* flags for integrity meta */

#define IO_INTEGRITY_CHK_GUARD		(1U << 0) /* enforce guard check */

#define IO_INTEGRITY_CHK_REFTAG		(1U << 1) /* enforce ref check */

#define IO_INTEGRITY_CHK_APPTAG		(1U << 2) /* enforce app check */



#define IO_INTEGRITY_VALID_FLAGS (IO_INTEGRITY_CHK_GUARD | \

				  IO_INTEGRITY_CHK_REFTAG | \

				  IO_INTEGRITY_CHK_APPTAG)



#define SEEK_SET	0	/* seek relative to beginning of file */

#define SEEK_CUR	1	/* seek relative to current file position */

#define SEEK_END	2	/* seek relative to end of file */