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So far the userland VMA tests have been established as a rough expression of what's been possible. Adapt it into a more usable form by separating out tests and shared helper 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. Link: https://lkml.kernel.org/r/a0455ccfe4fdcd1c962c64f76304f612e5662a4e.1769097829.git.lorenzo.stoakes@oracle.com Signed-off-by: Lorenzo Stoakes <lorenzo.stoakes@oracle.com> Reviewed-by: Liam R. Howlett <Liam.Howlett@oracle.com> Cc: Baolin Wang <baolin.wang@linux.alibaba.com> Cc: Barry Song <baohua@kernel.org> Cc: David Hildenbrand <david@kernel.org> Cc: Dev Jain <dev.jain@arm.com> Cc: Jason Gunthorpe <jgg@nvidia.com> Cc: Suren Baghdasaryan <surenb@google.com> Cc: Vlastimil Babka <vbabka@suse.cz> Cc: Zi Yan <ziy@nvidia.com> Cc: Damien Le Moal <dlemoal@kernel.org> Cc: "Darrick J. Wong" <djwong@kernel.org> Cc: Jarkko Sakkinen <jarkko@kernel.org> Cc: Yury Norov <ynorov@nvidia.com> Cc: Chris Mason <clm@fb.com> Cc: Pedro Falcato <pfalcato@suse.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
114 lines
3.4 KiB
C
114 lines
3.4 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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#pragma once
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#include <stdbool.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include "generated/bit-length.h"
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#include "maple-shared.h"
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#include "vma_internal.h"
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#include "../../../mm/vma.h"
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/* Simple test runner. Assumes local num_[fail, tests] counters. */
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#define TEST(name) \
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do { \
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(*num_tests)++; \
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if (!test_##name()) { \
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(*num_fail)++; \
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fprintf(stderr, "Test " #name " FAILED\n"); \
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} \
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} while (0)
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#define ASSERT_TRUE(_expr) \
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do { \
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if (!(_expr)) { \
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fprintf(stderr, \
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"Assert FAILED at %s:%d:%s(): %s is FALSE.\n", \
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__FILE__, __LINE__, __FUNCTION__, #_expr); \
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return false; \
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} \
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} while (0)
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#define ASSERT_FALSE(_expr) ASSERT_TRUE(!(_expr))
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#define ASSERT_EQ(_val1, _val2) ASSERT_TRUE((_val1) == (_val2))
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#define ASSERT_NE(_val1, _val2) ASSERT_TRUE((_val1) != (_val2))
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#define IS_SET(_val, _flags) ((_val & _flags) == _flags)
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extern bool fail_prealloc;
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/* Override vma_iter_prealloc() so we can choose to fail it. */
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#define vma_iter_prealloc(vmi, vma) \
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(fail_prealloc ? -ENOMEM : mas_preallocate(&(vmi)->mas, (vma), GFP_KERNEL))
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#define CONFIG_DEFAULT_MMAP_MIN_ADDR 65536
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extern unsigned long mmap_min_addr;
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extern unsigned long dac_mmap_min_addr;
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extern unsigned long stack_guard_gap;
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extern const struct vm_operations_struct vma_dummy_vm_ops;
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extern struct anon_vma dummy_anon_vma;
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extern struct task_struct __current;
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/*
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* Helper function which provides a wrapper around a merge existing VMA
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* operation.
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*
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* Declared in main.c as uses static VMA function.
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*/
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struct vm_area_struct *merge_existing(struct vma_merge_struct *vmg);
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/*
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* Helper function to allocate a VMA and link it to the tree.
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*
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* Declared in main.c as uses static VMA function.
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*/
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int attach_vma(struct mm_struct *mm, struct vm_area_struct *vma);
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/* Helper function providing a dummy vm_ops->close() method.*/
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static inline void dummy_close(struct vm_area_struct *)
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{
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}
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/* Helper function to simply allocate a VMA. */
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struct vm_area_struct *alloc_vma(struct mm_struct *mm,
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unsigned long start, unsigned long end,
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pgoff_t pgoff, vm_flags_t vm_flags);
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/* Helper function to detach and free a VMA. */
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void detach_free_vma(struct vm_area_struct *vma);
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/* Helper function to allocate a VMA and link it to the tree. */
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struct vm_area_struct *alloc_and_link_vma(struct mm_struct *mm,
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unsigned long start, unsigned long end,
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pgoff_t pgoff, vm_flags_t vm_flags);
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/*
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* Helper function to reset the dummy anon_vma to indicate it has not been
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* duplicated.
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*/
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void reset_dummy_anon_vma(void);
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/*
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* Helper function to remove all VMAs and destroy the maple tree associated with
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* a virtual address space. Returns a count of VMAs in the tree.
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*/
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int cleanup_mm(struct mm_struct *mm, struct vma_iterator *vmi);
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/* Helper function to determine if VMA has had vma_start_write() performed. */
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bool vma_write_started(struct vm_area_struct *vma);
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void __vma_set_dummy_anon_vma(struct vm_area_struct *vma,
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struct anon_vma_chain *avc, struct anon_vma *anon_vma);
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/* Provide a simple dummy VMA/anon_vma dummy setup for testing. */
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void vma_set_dummy_anon_vma(struct vm_area_struct *vma,
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struct anon_vma_chain *avc);
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/* Helper function to specify a VMA's range. */
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void vma_set_range(struct vm_area_struct *vma,
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unsigned long start, unsigned long end,
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pgoff_t pgoff);
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