linux-kernel - [PATCH v2 5/8] tools: testing: add additional vma

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Message-ID: <4eddd714a8d6dfb052032dfda5aa28d9f4bd134a.1729715266.git.lorenzo.stoakes@oracle.com>
Date: Wed, 23 Oct 2024 21:38:30 +0100
From: Lorenzo Stoakes <lorenzo.stoakes@...cle.com>
To: Andrew Morton <akpm@...ux-foundation.org>
Cc: "Liam R . Howlett" <Liam.Howlett@...cle.com>,
        Vlastimil Babka <vbabka@...e.cz>, Jann Horn <jannh@...gle.com>,
        linux-kernel@...r.kernel.org, linux-mm@...ck.org,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        Peter Xu <peterx@...hat.com>
Subject: [PATCH v2 5/8] tools: testing: add additional vma_internal.h stubs

Add some additional vma_internal.h stubs in preparation for __mmap_region()
being moved to mm/vma.c. Without these the move would result in the tests
no longer compiling.

Signed-off-by: Lorenzo Stoakes <lorenzo.stoakes@...cle.com>
---
 tools/testing/vma/vma_internal.h | 115 ++++++++++++++++++++++++++++++-
 1 file changed, 114 insertions(+), 1 deletion(-)

diff --git a/tools/testing/vma/vma_internal.h b/tools/testing/vma/vma_internal.h
index c5b9da034511..77eba27365a2 100644
--- a/tools/testing/vma/vma_internal.h
+++ b/tools/testing/vma/vma_internal.h
@@ -44,7 +44,9 @@
 #define VM_LOCKED	0x00002000
 #define VM_IO           0x00004000
 #define VM_DONTEXPAND	0x00040000
+#define VM_LOCKONFAULT	0x00080000
 #define VM_ACCOUNT	0x00100000
+#define VM_NORESERVE	0x00200000
 #define VM_MIXEDMAP	0x10000000
 #define VM_STACK	VM_GROWSDOWN
 #define VM_SHADOW_STACK	VM_NONE
@@ -53,6 +55,14 @@
 #define VM_ACCESS_FLAGS (VM_READ | VM_WRITE | VM_EXEC)
 #define VM_SPECIAL (VM_IO | VM_DONTEXPAND | VM_PFNMAP | VM_MIXEDMAP)

+/* This mask represents all the VMA flag bits used by mlock */
+#define VM_LOCKED_MASK	(VM_LOCKED | VM_LOCKONFAULT)
+
+#ifdef CONFIG_64BIT
+/* VM is sealed, in vm_flags */
+#define VM_SEALED	_BITUL(63)
+#endif
+
 #define FIRST_USER_ADDRESS	0UL
 #define USER_PGTABLES_CEILING	0UL

@@ -698,8 +708,9 @@ static inline void tlb_finish_mmu(struct mmu_gather *)
 {
 }

-static inline void get_file(struct file *)
+static inline struct file *get_file(struct file *f)
 {
+	return f;
 }

 static inline int vma_dup_policy(struct vm_area_struct *, struct vm_area_struct *)
@@ -920,4 +931,106 @@ static inline bool signal_pending(void *)
 	return false;
 }

+static inline bool is_file_hugepages(struct file *)
+{
+	return false;
+}
+
+static inline int security_vm_enough_memory_mm(struct mm_struct *, long)
+{
+	return true;
+}
+
+static inline bool may_expand_vm(struct mm_struct *, vm_flags_t, unsigned long)
+{
+	return true;
+}
+
+static inline void vm_flags_init(struct vm_area_struct *vma,
+				 vm_flags_t flags)
+{
+	vma->__vm_flags = flags;
+}
+
+static inline void vm_flags_set(struct vm_area_struct *vma,
+				vm_flags_t flags)
+{
+	vma_start_write(vma);
+	vma->__vm_flags |= flags;
+}
+
+static inline void vm_flags_clear(struct vm_area_struct *vma,
+				  vm_flags_t flags)
+{
+	vma_start_write(vma);
+	vma->__vm_flags &= ~flags;
+}
+
+static inline int call_mmap(struct file *, struct vm_area_struct *)
+{
+	return 0;
+}
+
+static inline int shmem_zero_setup(struct vm_area_struct *)
+{
+	return 0;
+}
+
+static inline void vma_set_anonymous(struct vm_area_struct *vma)
+{
+	vma->vm_ops = NULL;
+}
+
+static inline void ksm_add_vma(struct vm_area_struct *)
+{
+}
+
+static inline void perf_event_mmap(struct vm_area_struct *)
+{
+}
+
+static inline bool vma_is_dax(struct vm_area_struct *)
+{
+	return false;
+}
+
+static inline struct vm_area_struct *get_gate_vma(struct mm_struct *)
+{
+	return NULL;
+}
+
+bool vma_wants_writenotify(struct vm_area_struct *vma, pgprot_t vm_page_prot);
+
+/* Update vma->vm_page_prot to reflect vma->vm_flags. */
+static inline void vma_set_page_prot(struct vm_area_struct *vma)
+{
+	unsigned long vm_flags = vma->vm_flags;
+	pgprot_t vm_page_prot;
+
+	/* testing: we inline vm_pgprot_modify() to avoid clash with vma.h. */
+	vm_page_prot = pgprot_modify(vma->vm_page_prot, vm_get_page_prot(vm_flags));
+
+	if (vma_wants_writenotify(vma, vm_page_prot)) {
+		vm_flags &= ~VM_SHARED;
+		/* testing: we inline vm_pgprot_modify() to avoid clash with vma.h. */
+		vm_page_prot = pgprot_modify(vm_page_prot, vm_get_page_prot(vm_flags));
+	}
+	/* remove_protection_ptes reads vma->vm_page_prot without mmap_lock */
+	WRITE_ONCE(vma->vm_page_prot, vm_page_prot);
+}
+
+static inline bool arch_validate_flags(unsigned long)
+{
+	return true;
+}
+
+static inline void vma_close(struct vm_area_struct *)
+{
+}
+
+static inline int mmap_file(struct file *, struct vm_area_struct *)
+{
+	return 0;
+}
+
 #endif	/* __MM_VMA_INTERNAL_H */
--
2.47.0