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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 <[email protected]>
Signed-off-by: Anuj Gupta <[email protected]>
Reviewed-by: Christoph Hellwig <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Jens Axboe <[email protected]>
This commit is contained in:
Anuj Gupta authored and Jens Axboe committed 2024-12-23 08:17:16 -07:00
1 parent fe8f4ca710
commit 10783d0ba0
2 files changed
+18
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include/linux/uio.h
+9
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)
include/uapi/linux/fs.h
+9
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 */