Commit e06f1e1d authored by Shaohua Li's avatar Shaohua Li Committed by Linus Torvalds

userfaultfd: wp: enabled write protection in userfaultfd API

Now it's safe to enable write protection in userfaultfd API
Signed-off-by: default avatarShaohua Li <shli@fb.com>
Signed-off-by: default avatarAndrea Arcangeli <aarcange@redhat.com>
Signed-off-by: default avatarPeter Xu <peterx@redhat.com>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Reviewed-by: default avatarJerome Glisse <jglisse@redhat.com>
Reviewed-by: default avatarMike Rapoport <rppt@linux.vnet.ibm.com>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Cc: Rik van Riel <riel@redhat.com>
Cc: Kirill A. Shutemov <kirill@shutemov.name>
Cc: Mel Gorman <mgorman@suse.de>
Cc: Hugh Dickins <hughd@google.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Bobby Powers <bobbypowers@gmail.com>
Cc: Brian Geffon <bgeffon@google.com>
Cc: David Hildenbrand <david@redhat.com>
Cc: Denis Plotnikov <dplotnikov@virtuozzo.com>
Cc: "Dr . David Alan Gilbert" <dgilbert@redhat.com>
Cc: Martin Cracauer <cracauer@cons.org>
Cc: Marty McFadden <mcfadden8@llnl.gov>
Cc: Maya Gokhale <gokhale2@llnl.gov>
Cc: Mike Kravetz <mike.kravetz@oracle.com>
Cc: Pavel Emelyanov <xemul@openvz.org>
Link: http://lkml.kernel.org/r/20200220163112.11409-15-peterx@redhat.comSigned-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent 63b2d417
...@@ -19,7 +19,8 @@ ...@@ -19,7 +19,8 @@
* means the userland is reading). * means the userland is reading).
*/ */
#define UFFD_API ((__u64)0xAA) #define UFFD_API ((__u64)0xAA)
#define UFFD_API_FEATURES (UFFD_FEATURE_EVENT_FORK | \ #define UFFD_API_FEATURES (UFFD_FEATURE_PAGEFAULT_FLAG_WP | \
UFFD_FEATURE_EVENT_FORK | \
UFFD_FEATURE_EVENT_REMAP | \ UFFD_FEATURE_EVENT_REMAP | \
UFFD_FEATURE_EVENT_REMOVE | \ UFFD_FEATURE_EVENT_REMOVE | \
UFFD_FEATURE_EVENT_UNMAP | \ UFFD_FEATURE_EVENT_UNMAP | \
...@@ -34,7 +35,8 @@ ...@@ -34,7 +35,8 @@
#define UFFD_API_RANGE_IOCTLS \ #define UFFD_API_RANGE_IOCTLS \
((__u64)1 << _UFFDIO_WAKE | \ ((__u64)1 << _UFFDIO_WAKE | \
(__u64)1 << _UFFDIO_COPY | \ (__u64)1 << _UFFDIO_COPY | \
(__u64)1 << _UFFDIO_ZEROPAGE) (__u64)1 << _UFFDIO_ZEROPAGE | \
(__u64)1 << _UFFDIO_WRITEPROTECT)
#define UFFD_API_RANGE_IOCTLS_BASIC \ #define UFFD_API_RANGE_IOCTLS_BASIC \
((__u64)1 << _UFFDIO_WAKE | \ ((__u64)1 << _UFFDIO_WAKE | \
(__u64)1 << _UFFDIO_COPY) (__u64)1 << _UFFDIO_COPY)
......
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