From: Andrei Vagin <avagin@gmail.com>

Required for a new PAGEMAP_SCAN test to verify guard region reporting.

Signed-off-by: Andrei Vagin <avagin@gmail.com>
---
 tools/include/uapi/linux/fs.h | 19 ++++++++++++++++++-
 1 file changed, 18 insertions(+), 1 deletion(-)

diff --git a/tools/include/uapi/linux/fs.h b/tools/include/uapi/linux/fs.h
index 8a27bc5c7a7f..24ddf7bc4f25 100644
--- a/tools/include/uapi/linux/fs.h
+++ b/tools/include/uapi/linux/fs.h
@@ -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 */
@@ -329,9 +338,16 @@ typedef int __bitwise __kernel_rwf_t;
 /* per-IO negation of O_APPEND */
 #define RWF_NOAPPEND	((__force __kernel_rwf_t)0x00000020)
 
+/* Atomic Write */
+#define RWF_ATOMIC	((__force __kernel_rwf_t)0x00000040)
+
+/* buffered IO that drops the cache after reading or writing data */
+#define RWF_DONTCACHE	((__force __kernel_rwf_t)0x00000080)
+
 /* mask of flags supported by the kernel */
 #define RWF_SUPPORTED	(RWF_HIPRI | RWF_DSYNC | RWF_SYNC | RWF_NOWAIT |\
-			 RWF_APPEND | RWF_NOAPPEND)
+			 RWF_APPEND | RWF_NOAPPEND | RWF_ATOMIC |\
+			 RWF_DONTCACHE)
 
 #define PROCFS_IOCTL_MAGIC 'f'
 
@@ -347,6 +363,7 @@ typedef int __bitwise __kernel_rwf_t;
 #define PAGE_IS_PFNZERO		(1 << 5)
 #define PAGE_IS_HUGE		(1 << 6)
 #define PAGE_IS_SOFT_DIRTY	(1 << 7)
+#define PAGE_IS_GUARD		(1 << 8)
 
 /*
  * struct page_region - Page region with flags
-- 
2.49.0.395.g12beb8f557-goog

On Mon, Mar 24, 2025 at 06:53:27AM +0000, Andrei Vagin wrote:
> From: Andrei Vagin <avagin@gmail.com>
>
> Required for a new PAGEMAP_SCAN test to verify guard region reporting.
>
> Signed-off-by: Andrei Vagin <avagin@gmail.com>

Reviewed-by: Lorenzo Stoakes <lorenzo.stoakes@oracle.com>

> ---
>  tools/include/uapi/linux/fs.h | 19 ++++++++++++++++++-
>  1 file changed, 18 insertions(+), 1 deletion(-)
>
> diff --git a/tools/include/uapi/linux/fs.h b/tools/include/uapi/linux/fs.h
> index 8a27bc5c7a7f..24ddf7bc4f25 100644
> --- a/tools/include/uapi/linux/fs.h
> +++ b/tools/include/uapi/linux/fs.h
> @@ -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 */
> @@ -329,9 +338,16 @@ typedef int __bitwise __kernel_rwf_t;
>  /* per-IO negation of O_APPEND */
>  #define RWF_NOAPPEND	((__force __kernel_rwf_t)0x00000020)
>
> +/* Atomic Write */
> +#define RWF_ATOMIC	((__force __kernel_rwf_t)0x00000040)
> +
> +/* buffered IO that drops the cache after reading or writing data */
> +#define RWF_DONTCACHE	((__force __kernel_rwf_t)0x00000080)
> +
>  /* mask of flags supported by the kernel */
>  #define RWF_SUPPORTED	(RWF_HIPRI | RWF_DSYNC | RWF_SYNC | RWF_NOWAIT |\
> -			 RWF_APPEND | RWF_NOAPPEND)
> +			 RWF_APPEND | RWF_NOAPPEND | RWF_ATOMIC |\
> +			 RWF_DONTCACHE)
>
>  #define PROCFS_IOCTL_MAGIC 'f'
>
> @@ -347,6 +363,7 @@ typedef int __bitwise __kernel_rwf_t;
>  #define PAGE_IS_PFNZERO		(1 << 5)
>  #define PAGE_IS_HUGE		(1 << 6)
>  #define PAGE_IS_SOFT_DIRTY	(1 << 7)
> +#define PAGE_IS_GUARD		(1 << 8)
>
>  /*
>   * struct page_region - Page region with flags
> --
> 2.49.0.395.g12beb8f557-goog
>