| Message ID | 20250324065328.107678-3-avagin@google.com (mailing list archive) |
|---|---|
| State | New |
| Headers | show |
| Series | fs/proc: extend the PAGEMAP_SCAN ioctl to report guard regions | expand |
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 >
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