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fs, iov_iter: define meta io descriptor

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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: Kanchan Joshi <joshi.k@samsung.com>
Signed-off-by: Anuj Gupta <anuj20.g@samsung.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Link: https://lore.kernel.org/r/20241128112240.8867-5-anuj20.g@samsung.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Anuj Gupta 2024-11-28 16:52:34 +05:30 committed by Jens Axboe
parent b1e2f5a578
commit 911f18c584
2 changed files with 18 additions and 0 deletions
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9
include/linux/uio.h
View File

@ -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)

9
include/uapi/linux/fs.h
View File

@ -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 */