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Message-ID: <opopo4rlyxz7upi2bzrx7e6cyji2nmaynvlhvr2nzvtvb5pfxu@4fekgb5faybz>
Date: Mon, 9 Feb 2026 19:58:22 +0000
From: "Liam R. Howlett" <Liam.Howlett@...cle.com>
To: Lorenzo Stoakes <lorenzo.stoakes@...cle.com>
Cc: Andrew Morton <akpm@...ux-foundation.org>,
Jarkko Sakkinen <jarkko@...nel.org>,
Dave Hansen <dave.hansen@...ux.intel.com>,
Thomas Gleixner <tglx@...nel.org>, Ingo Molnar <mingo@...hat.com>,
Borislav Petkov <bp@...en8.de>, x86@...nel.org,
"H . Peter Anvin" <hpa@...or.com>, Arnd Bergmann <arnd@...db.de>,
Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
Dan Williams <dan.j.williams@...el.com>,
Vishal Verma <vishal.l.verma@...el.com>,
Dave Jiang <dave.jiang@...el.com>,
Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
Maxime Ripard <mripard@...nel.org>,
Thomas Zimmermann <tzimmermann@...e.de>,
David Airlie <airlied@...il.com>, Simona Vetter <simona@...ll.ch>,
Jani Nikula <jani.nikula@...ux.intel.com>,
Joonas Lahtinen <joonas.lahtinen@...ux.intel.com>,
Rodrigo Vivi <rodrigo.vivi@...el.com>,
Tvrtko Ursulin <tursulin@...ulin.net>,
Christian Koenig <christian.koenig@....com>,
Huang Rui <ray.huang@....com>, Matthew Auld <matthew.auld@...el.com>,
Matthew Brost <matthew.brost@...el.com>,
Alexander Viro <viro@...iv.linux.org.uk>,
Christian Brauner <brauner@...nel.org>, Jan Kara <jack@...e.cz>,
Benjamin LaHaise <bcrl@...ck.org>, Gao Xiang <xiang@...nel.org>,
Chao Yu <chao@...nel.org>, Yue Hu <zbestahu@...il.com>,
Jeffle Xu <jefflexu@...ux.alibaba.com>,
Sandeep Dhavale <dhavale@...gle.com>,
Hongbo Li <lihongbo22@...wei.com>, Chunhai Guo <guochunhai@...o.com>,
Theodore Ts'o <tytso@....edu>,
Andreas Dilger <adilger.kernel@...ger.ca>,
Muchun Song <muchun.song@...ux.dev>,
Oscar Salvador <osalvador@...e.de>,
David Hildenbrand <david@...nel.org>,
Konstantin Komarov <almaz.alexandrovich@...agon-software.com>,
Mike Marshall <hubcap@...ibond.com>,
Martin Brandenburg <martin@...ibond.com>,
Tony Luck <tony.luck@...el.com>,
Reinette Chatre <reinette.chatre@...el.com>,
Dave Martin <Dave.Martin@....com>, James Morse <james.morse@....com>,
Babu Moger <babu.moger@....com>, Carlos Maiolino <cem@...nel.org>,
Damien Le Moal <dlemoal@...nel.org>,
Naohiro Aota <naohiro.aota@....com>,
Johannes Thumshirn <jth@...nel.org>,
Matthew Wilcox <willy@...radead.org>, Vlastimil Babka <vbabka@...e.cz>,
Mike Rapoport <rppt@...nel.org>,
Suren Baghdasaryan <surenb@...gle.com>, Michal Hocko <mhocko@...e.com>,
Hugh Dickins <hughd@...gle.com>,
Baolin Wang <baolin.wang@...ux.alibaba.com>, Zi Yan <ziy@...dia.com>,
Nico Pache <npache@...hat.com>, Ryan Roberts <ryan.roberts@....com>,
Dev Jain <dev.jain@....com>, Barry Song <baohua@...nel.org>,
Lance Yang <lance.yang@...ux.dev>, Jann Horn <jannh@...gle.com>,
Pedro Falcato <pfalcato@...e.de>, David Howells <dhowells@...hat.com>,
Paul Moore <paul@...l-moore.com>, James Morris <jmorris@...ei.org>,
"Serge E . Hallyn" <serge@...lyn.com>,
Yury Norov <yury.norov@...il.com>,
Rasmus Villemoes <linux@...musvillemoes.dk>, linux-sgx@...r.kernel.org,
linux-kernel@...r.kernel.org, nvdimm@...ts.linux.dev,
linux-cxl@...r.kernel.org, dri-devel@...ts.freedesktop.org,
intel-gfx@...ts.freedesktop.org, linux-fsdevel@...r.kernel.org,
linux-aio@...ck.org, linux-erofs@...ts.ozlabs.org,
linux-ext4@...r.kernel.org, linux-mm@...ck.org, ntfs3@...ts.linux.dev,
devel@...ts.orangefs.org, linux-xfs@...r.kernel.org,
keyrings@...r.kernel.org, linux-security-module@...r.kernel.org,
Jason Gunthorpe <jgg@...dia.com>
Subject: Re: [PATCH v2 11/13] tools/testing/vma: separate VMA userland tests
into separate files
* Lorenzo Stoakes <lorenzo.stoakes@...cle.com> [260122 16:06]:
> So far the userland VMA tests have been established as a rough expression
> of what's been possible.
>
> qAdapt it into a more usable form by separating out tests and shared helper
^^^^ Typo
> functions.
>
> Since we test functions that are declared statically in mm/vma.c, we make
> use of the trick of #include'ing kernel C files directly.
>
> In order for the tests to continue to function, we must therefore also
> this way into the tests/ directory.
>
> We try to keep as much shared logic actually modularised into a separate
> compilation unit in shared.c, however the merge_existing() and attach_vma()
> helpers rely on statically declared mm/vma.c functions so these must be
> declared in main.c.
>
> Signed-off-by: Lorenzo Stoakes <lorenzo.stoakes@...cle.com>
Besides that typo, it looks good.
Reviewed-by: Liam R. Howlett <Liam.Howlett@...cle.com>
> ---
> tools/testing/vma/Makefile | 4 +-
> tools/testing/vma/main.c | 55 ++++
> tools/testing/vma/shared.c | 131 ++++++++
> tools/testing/vma/shared.h | 114 +++++++
> tools/testing/vma/{vma.c => tests/merge.c} | 332 +--------------------
> tools/testing/vma/tests/mmap.c | 57 ++++
> tools/testing/vma/tests/vma.c | 39 +++
> tools/testing/vma/vma_internal.h | 9 -
> 8 files changed, 406 insertions(+), 335 deletions(-)
> create mode 100644 tools/testing/vma/main.c
> create mode 100644 tools/testing/vma/shared.c
> create mode 100644 tools/testing/vma/shared.h
> rename tools/testing/vma/{vma.c => tests/merge.c} (82%)
> create mode 100644 tools/testing/vma/tests/mmap.c
> create mode 100644 tools/testing/vma/tests/vma.c
>
> diff --git a/tools/testing/vma/Makefile b/tools/testing/vma/Makefile
> index 66f3831a668f..94133d9d3955 100644
> --- a/tools/testing/vma/Makefile
> +++ b/tools/testing/vma/Makefile
> @@ -6,10 +6,10 @@ default: vma
>
> include ../shared/shared.mk
>
> -OFILES = $(SHARED_OFILES) vma.o maple-shim.o
> +OFILES = $(SHARED_OFILES) main.o shared.o maple-shim.o
> TARGETS = vma
>
> -vma.o: vma.c vma_internal.h ../../../mm/vma.c ../../../mm/vma_init.c ../../../mm/vma_exec.c ../../../mm/vma.h
> +main.o: main.c shared.c shared.h vma_internal.h tests/merge.c tests/mmap.c tests/vma.c ../../../mm/vma.c ../../../mm/vma_init.c ../../../mm/vma_exec.c ../../../mm/vma.h
>
> vma: $(OFILES)
> $(CC) $(CFLAGS) -o $@ $(OFILES) $(LDLIBS)
> diff --git a/tools/testing/vma/main.c b/tools/testing/vma/main.c
> new file mode 100644
> index 000000000000..49b09e97a51f
> --- /dev/null
> +++ b/tools/testing/vma/main.c
> @@ -0,0 +1,55 @@
> +// SPDX-License-Identifier: GPL-2.0-or-later
> +
> +#include "shared.h"
> +/*
> + * Directly import the VMA implementation here. Our vma_internal.h wrapper
> + * provides userland-equivalent functionality for everything vma.c uses.
> + */
> +#include "../../../mm/vma_init.c"
> +#include "../../../mm/vma_exec.c"
> +#include "../../../mm/vma.c"
> +
> +/* Tests are included directly so they can test static functions in mm/vma.c. */
> +#include "tests/merge.c"
> +#include "tests/mmap.c"
> +#include "tests/vma.c"
> +
> +/* Helper functions which utilise static kernel functions. */
> +
> +struct vm_area_struct *merge_existing(struct vma_merge_struct *vmg)
> +{
> + struct vm_area_struct *vma;
> +
> + vma = vma_merge_existing_range(vmg);
> + if (vma)
> + vma_assert_attached(vma);
> + return vma;
> +}
> +
> +int attach_vma(struct mm_struct *mm, struct vm_area_struct *vma)
> +{
> + int res;
> +
> + res = vma_link(mm, vma);
> + if (!res)
> + vma_assert_attached(vma);
> + return res;
> +}
> +
> +/* Main test running which invokes tests/ *.c runners. */
> +int main(void)
> +{
> + int num_tests = 0, num_fail = 0;
> +
> + maple_tree_init();
> + vma_state_init();
> +
> + run_merge_tests(&num_tests, &num_fail);
> + run_mmap_tests(&num_tests, &num_fail);
> + run_vma_tests(&num_tests, &num_fail);
> +
> + printf("%d tests run, %d passed, %d failed.\n",
> + num_tests, num_tests - num_fail, num_fail);
> +
> + return num_fail == 0 ? EXIT_SUCCESS : EXIT_FAILURE;
> +}
> diff --git a/tools/testing/vma/shared.c b/tools/testing/vma/shared.c
> new file mode 100644
> index 000000000000..bda578cc3304
> --- /dev/null
> +++ b/tools/testing/vma/shared.c
> @@ -0,0 +1,131 @@
> +// SPDX-License-Identifier: GPL-2.0-or-later
> +
> +#include "shared.h"
> +
> +
> +bool fail_prealloc;
> +unsigned long mmap_min_addr = CONFIG_DEFAULT_MMAP_MIN_ADDR;
> +unsigned long dac_mmap_min_addr = CONFIG_DEFAULT_MMAP_MIN_ADDR;
> +unsigned long stack_guard_gap = 256UL<<PAGE_SHIFT;
> +
> +const struct vm_operations_struct vma_dummy_vm_ops;
> +struct anon_vma dummy_anon_vma;
> +struct task_struct __current;
> +
> +struct vm_area_struct *alloc_vma(struct mm_struct *mm,
> + unsigned long start, unsigned long end,
> + pgoff_t pgoff, vm_flags_t vm_flags)
> +{
> + struct vm_area_struct *vma = vm_area_alloc(mm);
> +
> + if (vma == NULL)
> + return NULL;
> +
> + vma->vm_start = start;
> + vma->vm_end = end;
> + vma->vm_pgoff = pgoff;
> + vm_flags_reset(vma, vm_flags);
> + vma_assert_detached(vma);
> +
> + return vma;
> +}
> +
> +void detach_free_vma(struct vm_area_struct *vma)
> +{
> + vma_mark_detached(vma);
> + vm_area_free(vma);
> +}
> +
> +struct vm_area_struct *alloc_and_link_vma(struct mm_struct *mm,
> + unsigned long start, unsigned long end,
> + pgoff_t pgoff, vm_flags_t vm_flags)
> +{
> + struct vm_area_struct *vma = alloc_vma(mm, start, end, pgoff, vm_flags);
> +
> + if (vma == NULL)
> + return NULL;
> +
> + if (attach_vma(mm, vma)) {
> + detach_free_vma(vma);
> + return NULL;
> + }
> +
> + /*
> + * Reset this counter which we use to track whether writes have
> + * begun. Linking to the tree will have caused this to be incremented,
> + * which means we will get a false positive otherwise.
> + */
> + vma->vm_lock_seq = UINT_MAX;
> +
> + return vma;
> +}
> +
> +void reset_dummy_anon_vma(void)
> +{
> + dummy_anon_vma.was_cloned = false;
> + dummy_anon_vma.was_unlinked = false;
> +}
> +
> +int cleanup_mm(struct mm_struct *mm, struct vma_iterator *vmi)
> +{
> + struct vm_area_struct *vma;
> + int count = 0;
> +
> + fail_prealloc = false;
> + reset_dummy_anon_vma();
> +
> + vma_iter_set(vmi, 0);
> + for_each_vma(*vmi, vma) {
> + detach_free_vma(vma);
> + count++;
> + }
> +
> + mtree_destroy(&mm->mm_mt);
> + mm->map_count = 0;
> + return count;
> +}
> +
> +bool vma_write_started(struct vm_area_struct *vma)
> +{
> + int seq = vma->vm_lock_seq;
> +
> + /* We reset after each check. */
> + vma->vm_lock_seq = UINT_MAX;
> +
> + /* The vma_start_write() stub simply increments this value. */
> + return seq > -1;
> +}
> +
> +void __vma_set_dummy_anon_vma(struct vm_area_struct *vma,
> + struct anon_vma_chain *avc, struct anon_vma *anon_vma)
> +{
> + vma->anon_vma = anon_vma;
> + INIT_LIST_HEAD(&vma->anon_vma_chain);
> + list_add(&avc->same_vma, &vma->anon_vma_chain);
> + avc->anon_vma = vma->anon_vma;
> +}
> +
> +void vma_set_dummy_anon_vma(struct vm_area_struct *vma,
> + struct anon_vma_chain *avc)
> +{
> + __vma_set_dummy_anon_vma(vma, avc, &dummy_anon_vma);
> +}
> +
> +struct task_struct *get_current(void)
> +{
> + return &__current;
> +}
> +
> +unsigned long rlimit(unsigned int limit)
> +{
> + return (unsigned long)-1;
> +}
> +
> +void vma_set_range(struct vm_area_struct *vma,
> + unsigned long start, unsigned long end,
> + pgoff_t pgoff)
> +{
> + vma->vm_start = start;
> + vma->vm_end = end;
> + vma->vm_pgoff = pgoff;
> +}
> diff --git a/tools/testing/vma/shared.h b/tools/testing/vma/shared.h
> new file mode 100644
> index 000000000000..6c64211cfa22
> --- /dev/null
> +++ b/tools/testing/vma/shared.h
> @@ -0,0 +1,114 @@
> +// SPDX-License-Identifier: GPL-2.0-or-later
> +
> +#pragma once
> +
> +#include <stdbool.h>
> +#include <stdio.h>
> +#include <stdlib.h>
> +
> +#include "generated/bit-length.h"
> +#include "maple-shared.h"
> +#include "vma_internal.h"
> +#include "../../../mm/vma.h"
> +
> +/* Simple test runner. Assumes local num_[fail, tests] counters. */
> +#define TEST(name) \
> + do { \
> + (*num_tests)++; \
> + if (!test_##name()) { \
> + (*num_fail)++; \
> + fprintf(stderr, "Test " #name " FAILED\n"); \
> + } \
> + } while (0)
> +
> +#define ASSERT_TRUE(_expr) \
> + do { \
> + if (!(_expr)) { \
> + fprintf(stderr, \
> + "Assert FAILED at %s:%d:%s(): %s is FALSE.\n", \
> + __FILE__, __LINE__, __FUNCTION__, #_expr); \
> + return false; \
> + } \
> + } while (0)
> +
> +#define ASSERT_FALSE(_expr) ASSERT_TRUE(!(_expr))
> +#define ASSERT_EQ(_val1, _val2) ASSERT_TRUE((_val1) == (_val2))
> +#define ASSERT_NE(_val1, _val2) ASSERT_TRUE((_val1) != (_val2))
> +
> +#define IS_SET(_val, _flags) ((_val & _flags) == _flags)
> +
> +extern bool fail_prealloc;
> +
> +/* Override vma_iter_prealloc() so we can choose to fail it. */
> +#define vma_iter_prealloc(vmi, vma) \
> + (fail_prealloc ? -ENOMEM : mas_preallocate(&(vmi)->mas, (vma), GFP_KERNEL))
> +
> +#define CONFIG_DEFAULT_MMAP_MIN_ADDR 65536
> +
> +extern unsigned long mmap_min_addr;
> +extern unsigned long dac_mmap_min_addr;
> +extern unsigned long stack_guard_gap;
> +
> +extern const struct vm_operations_struct vma_dummy_vm_ops;
> +extern struct anon_vma dummy_anon_vma;
> +extern struct task_struct __current;
> +
> +/*
> + * Helper function which provides a wrapper around a merge existing VMA
> + * operation.
> + *
> + * Declared in main.c as uses static VMA function.
> + */
> +struct vm_area_struct *merge_existing(struct vma_merge_struct *vmg);
> +
> +/*
> + * Helper function to allocate a VMA and link it to the tree.
> + *
> + * Declared in main.c as uses static VMA function.
> + */
> +int attach_vma(struct mm_struct *mm, struct vm_area_struct *vma);
> +
> +/* Helper function providing a dummy vm_ops->close() method.*/
> +static inline void dummy_close(struct vm_area_struct *)
> +{
> +}
> +
> +/* Helper function to simply allocate a VMA. */
> +struct vm_area_struct *alloc_vma(struct mm_struct *mm,
> + unsigned long start, unsigned long end,
> + pgoff_t pgoff, vm_flags_t vm_flags);
> +
> +/* Helper function to detach and free a VMA. */
> +void detach_free_vma(struct vm_area_struct *vma);
> +
> +/* Helper function to allocate a VMA and link it to the tree. */
> +struct vm_area_struct *alloc_and_link_vma(struct mm_struct *mm,
> + unsigned long start, unsigned long end,
> + pgoff_t pgoff, vm_flags_t vm_flags);
> +
> +/*
> + * Helper function to reset the dummy anon_vma to indicate it has not been
> + * duplicated.
> + */
> +void reset_dummy_anon_vma(void);
> +
> +/*
> + * Helper function to remove all VMAs and destroy the maple tree associated with
> + * a virtual address space. Returns a count of VMAs in the tree.
> + */
> +int cleanup_mm(struct mm_struct *mm, struct vma_iterator *vmi);
> +
> +/* Helper function to determine if VMA has had vma_start_write() performed. */
> +bool vma_write_started(struct vm_area_struct *vma);
> +
> +void __vma_set_dummy_anon_vma(struct vm_area_struct *vma,
> + struct anon_vma_chain *avc, struct anon_vma *anon_vma);
> +
> +/* Provide a simple dummy VMA/anon_vma dummy setup for testing. */
> +void vma_set_dummy_anon_vma(struct vm_area_struct *vma,
> + struct anon_vma_chain *avc);
> +
> +/* Helper function to specify a VMA's range. */
> +void vma_set_range(struct vm_area_struct *vma,
> + unsigned long start, unsigned long end,
> + pgoff_t pgoff);
> diff --git a/tools/testing/vma/vma.c b/tools/testing/vma/tests/merge.c
> similarity index 82%
> rename from tools/testing/vma/vma.c
> rename to tools/testing/vma/tests/merge.c
> index 93d21bc7e112..3708dc6945b0 100644
> --- a/tools/testing/vma/vma.c
> +++ b/tools/testing/vma/tests/merge.c
> @@ -1,132 +1,5 @@
> // SPDX-License-Identifier: GPL-2.0-or-later
>
> -#include <stdbool.h>
> -#include <stdio.h>
> -#include <stdlib.h>
> -
> -#include "generated/bit-length.h"
> -
> -#include "maple-shared.h"
> -#include "vma_internal.h"
> -
> -/* Include so header guard set. */
> -#include "../../../mm/vma.h"
> -
> -static bool fail_prealloc;
> -
> -/* Then override vma_iter_prealloc() so we can choose to fail it. */
> -#define vma_iter_prealloc(vmi, vma) \
> - (fail_prealloc ? -ENOMEM : mas_preallocate(&(vmi)->mas, (vma), GFP_KERNEL))
> -
> -#define CONFIG_DEFAULT_MMAP_MIN_ADDR 65536
> -
> -unsigned long mmap_min_addr = CONFIG_DEFAULT_MMAP_MIN_ADDR;
> -unsigned long dac_mmap_min_addr = CONFIG_DEFAULT_MMAP_MIN_ADDR;
> -unsigned long stack_guard_gap = 256UL<<PAGE_SHIFT;
> -
> -/*
> - * Directly import the VMA implementation here. Our vma_internal.h wrapper
> - * provides userland-equivalent functionality for everything vma.c uses.
> - */
> -#include "../../../mm/vma_init.c"
> -#include "../../../mm/vma_exec.c"
> -#include "../../../mm/vma.c"
> -
> -const struct vm_operations_struct vma_dummy_vm_ops;
> -static struct anon_vma dummy_anon_vma;
> -
> -#define ASSERT_TRUE(_expr) \
> - do { \
> - if (!(_expr)) { \
> - fprintf(stderr, \
> - "Assert FAILED at %s:%d:%s(): %s is FALSE.\n", \
> - __FILE__, __LINE__, __FUNCTION__, #_expr); \
> - return false; \
> - } \
> - } while (0)
> -#define ASSERT_FALSE(_expr) ASSERT_TRUE(!(_expr))
> -#define ASSERT_EQ(_val1, _val2) ASSERT_TRUE((_val1) == (_val2))
> -#define ASSERT_NE(_val1, _val2) ASSERT_TRUE((_val1) != (_val2))
> -
> -#define IS_SET(_val, _flags) ((_val & _flags) == _flags)
> -
> -static struct task_struct __current;
> -
> -struct task_struct *get_current(void)
> -{
> - return &__current;
> -}
> -
> -unsigned long rlimit(unsigned int limit)
> -{
> - return (unsigned long)-1;
> -}
> -
> -/* Helper function to simply allocate a VMA. */
> -static struct vm_area_struct *alloc_vma(struct mm_struct *mm,
> - unsigned long start,
> - unsigned long end,
> - pgoff_t pgoff,
> - vm_flags_t vm_flags)
> -{
> - struct vm_area_struct *vma = vm_area_alloc(mm);
> -
> - if (vma == NULL)
> - return NULL;
> -
> - vma->vm_start = start;
> - vma->vm_end = end;
> - vma->vm_pgoff = pgoff;
> - vm_flags_reset(vma, vm_flags);
> - vma_assert_detached(vma);
> -
> - return vma;
> -}
> -
> -/* Helper function to allocate a VMA and link it to the tree. */
> -static int attach_vma(struct mm_struct *mm, struct vm_area_struct *vma)
> -{
> - int res;
> -
> - res = vma_link(mm, vma);
> - if (!res)
> - vma_assert_attached(vma);
> - return res;
> -}
> -
> -static void detach_free_vma(struct vm_area_struct *vma)
> -{
> - vma_mark_detached(vma);
> - vm_area_free(vma);
> -}
> -
> -/* Helper function to allocate a VMA and link it to the tree. */
> -static struct vm_area_struct *alloc_and_link_vma(struct mm_struct *mm,
> - unsigned long start,
> - unsigned long end,
> - pgoff_t pgoff,
> - vm_flags_t vm_flags)
> -{
> - struct vm_area_struct *vma = alloc_vma(mm, start, end, pgoff, vm_flags);
> -
> - if (vma == NULL)
> - return NULL;
> -
> - if (attach_vma(mm, vma)) {
> - detach_free_vma(vma);
> - return NULL;
> - }
> -
> - /*
> - * Reset this counter which we use to track whether writes have
> - * begun. Linking to the tree will have caused this to be incremented,
> - * which means we will get a false positive otherwise.
> - */
> - vma->vm_lock_seq = UINT_MAX;
> -
> - return vma;
> -}
> -
> /* Helper function which provides a wrapper around a merge new VMA operation. */
> static struct vm_area_struct *merge_new(struct vma_merge_struct *vmg)
> {
> @@ -146,20 +19,6 @@ static struct vm_area_struct *merge_new(struct vma_merge_struct *vmg)
> return vma;
> }
>
> -/*
> - * Helper function which provides a wrapper around a merge existing VMA
> - * operation.
> - */
> -static struct vm_area_struct *merge_existing(struct vma_merge_struct *vmg)
> -{
> - struct vm_area_struct *vma;
> -
> - vma = vma_merge_existing_range(vmg);
> - if (vma)
> - vma_assert_attached(vma);
> - return vma;
> -}
> -
> /*
> * Helper function which provides a wrapper around the expansion of an existing
> * VMA.
> @@ -173,8 +32,8 @@ static int expand_existing(struct vma_merge_struct *vmg)
> * Helper function to reset merge state the associated VMA iterator to a
> * specified new range.
> */
> -static void vmg_set_range(struct vma_merge_struct *vmg, unsigned long start,
> - unsigned long end, pgoff_t pgoff, vm_flags_t vm_flags)
> +void vmg_set_range(struct vma_merge_struct *vmg, unsigned long start,
> + unsigned long end, pgoff_t pgoff, vm_flags_t vm_flags)
> {
> vma_iter_set(vmg->vmi, start);
>
> @@ -197,8 +56,8 @@ static void vmg_set_range(struct vma_merge_struct *vmg, unsigned long start,
>
> /* Helper function to set both the VMG range and its anon_vma. */
> static void vmg_set_range_anon_vma(struct vma_merge_struct *vmg, unsigned long start,
> - unsigned long end, pgoff_t pgoff, vm_flags_t vm_flags,
> - struct anon_vma *anon_vma)
> + unsigned long end, pgoff_t pgoff, vm_flags_t vm_flags,
> + struct anon_vma *anon_vma)
> {
> vmg_set_range(vmg, start, end, pgoff, vm_flags);
> vmg->anon_vma = anon_vma;
> @@ -211,10 +70,9 @@ static void vmg_set_range_anon_vma(struct vma_merge_struct *vmg, unsigned long s
> * VMA, link it to the maple tree and return it.
> */
> static struct vm_area_struct *try_merge_new_vma(struct mm_struct *mm,
> - struct vma_merge_struct *vmg,
> - unsigned long start, unsigned long end,
> - pgoff_t pgoff, vm_flags_t vm_flags,
> - bool *was_merged)
> + struct vma_merge_struct *vmg, unsigned long start,
> + unsigned long end, pgoff_t pgoff, vm_flags_t vm_flags,
> + bool *was_merged)
> {
> struct vm_area_struct *merged;
>
> @@ -234,72 +92,6 @@ static struct vm_area_struct *try_merge_new_vma(struct mm_struct *mm,
> return alloc_and_link_vma(mm, start, end, pgoff, vm_flags);
> }
>
> -/*
> - * Helper function to reset the dummy anon_vma to indicate it has not been
> - * duplicated.
> - */
> -static void reset_dummy_anon_vma(void)
> -{
> - dummy_anon_vma.was_cloned = false;
> - dummy_anon_vma.was_unlinked = false;
> -}
> -
> -/*
> - * Helper function to remove all VMAs and destroy the maple tree associated with
> - * a virtual address space. Returns a count of VMAs in the tree.
> - */
> -static int cleanup_mm(struct mm_struct *mm, struct vma_iterator *vmi)
> -{
> - struct vm_area_struct *vma;
> - int count = 0;
> -
> - fail_prealloc = false;
> - reset_dummy_anon_vma();
> -
> - vma_iter_set(vmi, 0);
> - for_each_vma(*vmi, vma) {
> - detach_free_vma(vma);
> - count++;
> - }
> -
> - mtree_destroy(&mm->mm_mt);
> - mm->map_count = 0;
> - return count;
> -}
> -
> -/* Helper function to determine if VMA has had vma_start_write() performed. */
> -static bool vma_write_started(struct vm_area_struct *vma)
> -{
> - int seq = vma->vm_lock_seq;
> -
> - /* We reset after each check. */
> - vma->vm_lock_seq = UINT_MAX;
> -
> - /* The vma_start_write() stub simply increments this value. */
> - return seq > -1;
> -}
> -
> -/* Helper function providing a dummy vm_ops->close() method.*/
> -static void dummy_close(struct vm_area_struct *)
> -{
> -}
> -
> -static void __vma_set_dummy_anon_vma(struct vm_area_struct *vma,
> - struct anon_vma_chain *avc,
> - struct anon_vma *anon_vma)
> -{
> - vma->anon_vma = anon_vma;
> - INIT_LIST_HEAD(&vma->anon_vma_chain);
> - list_add(&avc->same_vma, &vma->anon_vma_chain);
> - avc->anon_vma = vma->anon_vma;
> -}
> -
> -static void vma_set_dummy_anon_vma(struct vm_area_struct *vma,
> - struct anon_vma_chain *avc)
> -{
> - __vma_set_dummy_anon_vma(vma, avc, &dummy_anon_vma);
> -}
> -
> static bool test_simple_merge(void)
> {
> struct vm_area_struct *vma;
> @@ -1616,39 +1408,6 @@ static bool test_merge_extend(void)
> return true;
> }
>
> -static bool test_copy_vma(void)
> -{
> - vm_flags_t vm_flags = VM_READ | VM_WRITE | VM_MAYREAD | VM_MAYWRITE;
> - struct mm_struct mm = {};
> - bool need_locks = false;
> - VMA_ITERATOR(vmi, &mm, 0);
> - struct vm_area_struct *vma, *vma_new, *vma_next;
> -
> - /* Move backwards and do not merge. */
> -
> - vma = alloc_and_link_vma(&mm, 0x3000, 0x5000, 3, vm_flags);
> - vma_new = copy_vma(&vma, 0, 0x2000, 0, &need_locks);
> - ASSERT_NE(vma_new, vma);
> - ASSERT_EQ(vma_new->vm_start, 0);
> - ASSERT_EQ(vma_new->vm_end, 0x2000);
> - ASSERT_EQ(vma_new->vm_pgoff, 0);
> - vma_assert_attached(vma_new);
> -
> - cleanup_mm(&mm, &vmi);
> -
> - /* Move a VMA into position next to another and merge the two. */
> -
> - vma = alloc_and_link_vma(&mm, 0, 0x2000, 0, vm_flags);
> - vma_next = alloc_and_link_vma(&mm, 0x6000, 0x8000, 6, vm_flags);
> - vma_new = copy_vma(&vma, 0x4000, 0x2000, 4, &need_locks);
> - vma_assert_attached(vma_new);
> -
> - ASSERT_EQ(vma_new, vma_next);
> -
> - cleanup_mm(&mm, &vmi);
> - return true;
> -}
> -
> static bool test_expand_only_mode(void)
> {
> vm_flags_t vm_flags = VM_READ | VM_WRITE | VM_MAYREAD | VM_MAYWRITE;
> @@ -1689,73 +1448,8 @@ static bool test_expand_only_mode(void)
> return true;
> }
>
> -static bool test_mmap_region_basic(void)
> -{
> - struct mm_struct mm = {};
> - unsigned long addr;
> - struct vm_area_struct *vma;
> - VMA_ITERATOR(vmi, &mm, 0);
> -
> - current->mm = &mm;
> -
> - /* Map at 0x300000, length 0x3000. */
> - addr = __mmap_region(NULL, 0x300000, 0x3000,
> - VM_READ | VM_WRITE | VM_MAYREAD | VM_MAYWRITE,
> - 0x300, NULL);
> - ASSERT_EQ(addr, 0x300000);
> -
> - /* Map at 0x250000, length 0x3000. */
> - addr = __mmap_region(NULL, 0x250000, 0x3000,
> - VM_READ | VM_WRITE | VM_MAYREAD | VM_MAYWRITE,
> - 0x250, NULL);
> - ASSERT_EQ(addr, 0x250000);
> -
> - /* Map at 0x303000, merging to 0x300000 of length 0x6000. */
> - addr = __mmap_region(NULL, 0x303000, 0x3000,
> - VM_READ | VM_WRITE | VM_MAYREAD | VM_MAYWRITE,
> - 0x303, NULL);
> - ASSERT_EQ(addr, 0x303000);
> -
> - /* Map at 0x24d000, merging to 0x250000 of length 0x6000. */
> - addr = __mmap_region(NULL, 0x24d000, 0x3000,
> - VM_READ | VM_WRITE | VM_MAYREAD | VM_MAYWRITE,
> - 0x24d, NULL);
> - ASSERT_EQ(addr, 0x24d000);
> -
> - ASSERT_EQ(mm.map_count, 2);
> -
> - for_each_vma(vmi, vma) {
> - if (vma->vm_start == 0x300000) {
> - ASSERT_EQ(vma->vm_end, 0x306000);
> - ASSERT_EQ(vma->vm_pgoff, 0x300);
> - } else if (vma->vm_start == 0x24d000) {
> - ASSERT_EQ(vma->vm_end, 0x253000);
> - ASSERT_EQ(vma->vm_pgoff, 0x24d);
> - } else {
> - ASSERT_FALSE(true);
> - }
> - }
> -
> - cleanup_mm(&mm, &vmi);
> - return true;
> -}
> -
> -int main(void)
> +static void run_merge_tests(int *num_tests, int *num_fail)
> {
> - int num_tests = 0, num_fail = 0;
> -
> - maple_tree_init();
> - vma_state_init();
> -
> -#define TEST(name) \
> - do { \
> - num_tests++; \
> - if (!test_##name()) { \
> - num_fail++; \
> - fprintf(stderr, "Test " #name " FAILED\n"); \
> - } \
> - } while (0)
> -
> /* Very simple tests to kick the tyres. */
> TEST(simple_merge);
> TEST(simple_modify);
> @@ -1771,15 +1465,5 @@ int main(void)
> TEST(dup_anon_vma);
> TEST(vmi_prealloc_fail);
> TEST(merge_extend);
> - TEST(copy_vma);
> TEST(expand_only_mode);
> -
> - TEST(mmap_region_basic);
> -
> -#undef TEST
> -
> - printf("%d tests run, %d passed, %d failed.\n",
> - num_tests, num_tests - num_fail, num_fail);
> -
> - return num_fail == 0 ? EXIT_SUCCESS : EXIT_FAILURE;
> }
> diff --git a/tools/testing/vma/tests/mmap.c b/tools/testing/vma/tests/mmap.c
> new file mode 100644
> index 000000000000..bded4ecbe5db
> --- /dev/null
> +++ b/tools/testing/vma/tests/mmap.c
> @@ -0,0 +1,57 @@
> +// SPDX-License-Identifier: GPL-2.0-or-later
> +
> +static bool test_mmap_region_basic(void)
> +{
> + struct mm_struct mm = {};
> + unsigned long addr;
> + struct vm_area_struct *vma;
> + VMA_ITERATOR(vmi, &mm, 0);
> +
> + current->mm = &mm;
> +
> + /* Map at 0x300000, length 0x3000. */
> + addr = __mmap_region(NULL, 0x300000, 0x3000,
> + VM_READ | VM_WRITE | VM_MAYREAD | VM_MAYWRITE,
> + 0x300, NULL);
> + ASSERT_EQ(addr, 0x300000);
> +
> + /* Map at 0x250000, length 0x3000. */
> + addr = __mmap_region(NULL, 0x250000, 0x3000,
> + VM_READ | VM_WRITE | VM_MAYREAD | VM_MAYWRITE,
> + 0x250, NULL);
> + ASSERT_EQ(addr, 0x250000);
> +
> + /* Map at 0x303000, merging to 0x300000 of length 0x6000. */
> + addr = __mmap_region(NULL, 0x303000, 0x3000,
> + VM_READ | VM_WRITE | VM_MAYREAD | VM_MAYWRITE,
> + 0x303, NULL);
> + ASSERT_EQ(addr, 0x303000);
> +
> + /* Map at 0x24d000, merging to 0x250000 of length 0x6000. */
> + addr = __mmap_region(NULL, 0x24d000, 0x3000,
> + VM_READ | VM_WRITE | VM_MAYREAD | VM_MAYWRITE,
> + 0x24d, NULL);
> + ASSERT_EQ(addr, 0x24d000);
> +
> + ASSERT_EQ(mm.map_count, 2);
> +
> + for_each_vma(vmi, vma) {
> + if (vma->vm_start == 0x300000) {
> + ASSERT_EQ(vma->vm_end, 0x306000);
> + ASSERT_EQ(vma->vm_pgoff, 0x300);
> + } else if (vma->vm_start == 0x24d000) {
> + ASSERT_EQ(vma->vm_end, 0x253000);
> + ASSERT_EQ(vma->vm_pgoff, 0x24d);
> + } else {
> + ASSERT_FALSE(true);
> + }
> + }
> +
> + cleanup_mm(&mm, &vmi);
> + return true;
> +}
> +
> +static void run_mmap_tests(int *num_tests, int *num_fail)
> +{
> + TEST(mmap_region_basic);
> +}
> diff --git a/tools/testing/vma/tests/vma.c b/tools/testing/vma/tests/vma.c
> new file mode 100644
> index 000000000000..6d9775aee243
> --- /dev/null
> +++ b/tools/testing/vma/tests/vma.c
> @@ -0,0 +1,39 @@
> +// SPDX-License-Identifier: GPL-2.0-or-later
> +
> +static bool test_copy_vma(void)
> +{
> + vm_flags_t vm_flags = VM_READ | VM_WRITE | VM_MAYREAD | VM_MAYWRITE;
> + struct mm_struct mm = {};
> + bool need_locks = false;
> + VMA_ITERATOR(vmi, &mm, 0);
> + struct vm_area_struct *vma, *vma_new, *vma_next;
> +
> + /* Move backwards and do not merge. */
> +
> + vma = alloc_and_link_vma(&mm, 0x3000, 0x5000, 3, vm_flags);
> + vma_new = copy_vma(&vma, 0, 0x2000, 0, &need_locks);
> + ASSERT_NE(vma_new, vma);
> + ASSERT_EQ(vma_new->vm_start, 0);
> + ASSERT_EQ(vma_new->vm_end, 0x2000);
> + ASSERT_EQ(vma_new->vm_pgoff, 0);
> + vma_assert_attached(vma_new);
> +
> + cleanup_mm(&mm, &vmi);
> +
> + /* Move a VMA into position next to another and merge the two. */
> +
> + vma = alloc_and_link_vma(&mm, 0, 0x2000, 0, vm_flags);
> + vma_next = alloc_and_link_vma(&mm, 0x6000, 0x8000, 6, vm_flags);
> + vma_new = copy_vma(&vma, 0x4000, 0x2000, 4, &need_locks);
> + vma_assert_attached(vma_new);
> +
> + ASSERT_EQ(vma_new, vma_next);
> +
> + cleanup_mm(&mm, &vmi);
> + return true;
> +}
> +
> +static void run_vma_tests(int *num_tests, int *num_fail)
> +{
> + TEST(copy_vma);
> +}
> diff --git a/tools/testing/vma/vma_internal.h b/tools/testing/vma/vma_internal.h
> index 2743f12ecf32..b48ebae3927d 100644
> --- a/tools/testing/vma/vma_internal.h
> +++ b/tools/testing/vma/vma_internal.h
> @@ -1127,15 +1127,6 @@ static inline void mapping_allow_writable(struct address_space *mapping)
> atomic_inc(&mapping->i_mmap_writable);
> }
>
> -static inline void vma_set_range(struct vm_area_struct *vma,
> - unsigned long start, unsigned long end,
> - pgoff_t pgoff)
> -{
> - vma->vm_start = start;
> - vma->vm_end = end;
> - vma->vm_pgoff = pgoff;
> -}
> -
> static inline
> struct vm_area_struct *vma_find(struct vma_iterator *vmi, unsigned long max)
> {
> --
> 2.52.0
>
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