[PATCH 2/3] tools headers UAPI: Sync linux/fs.h with the kernel sources

From: Andrei Vagin
Date: Mon Mar 24 2025 - 02:55:19 EST


From: Andrei Vagin <avagin@xxxxxxxxx>

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

Signed-off-by: Andrei Vagin <avagin@xxxxxxxxx>
---
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