The patch titled
Subject: selftests/mm: add uffd_test_case_ops to allow test case-specific operations
has been added to the -mm mm-unstable branch. Its filename is
selftests-mm-add-uffd_test_case_ops-to-allow-test-case-specific-operations.patch
This patch will shortly appear at
https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/selftests-mm-add-uffd_test_case_ops-to-allow-test-case-specific-operations.patch
This patch will later appear in the mm-unstable branch at
git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
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------------------------------------------------------
From: Suren Baghdasaryan <surenb@xxxxxxxxxx>
Subject: selftests/mm: add uffd_test_case_ops to allow test case-specific operations
Date: Tue, 21 Nov 2023 09:16:37 -0800
Currently each test can specify unique operations using uffd_test_ops,
however these operations are per-memory type and not per-test. Add
uffd_test_case_ops which each test case can customize for its own needs
regardless of the memory type being used. Pre- and post-allocation
operations are added, some of which will be used in the next patch to
implement test-specific operations like madvise after memory is allocated
but before it is accessed.
Link: https://lkml.kernel.org/r/20231121171643.3719880-5-surenb@xxxxxxxxxx
Signed-off-by: Suren Baghdasaryan <surenb@xxxxxxxxxx>
Cc: Al Viro <viro@xxxxxxxxxxxxxxxxxx>
Cc: Andrea Arcangeli <aarcange@xxxxxxxxxx>
Cc: Axel Rasmussen <axelrasmussen@xxxxxxxxxx>
Cc: Brian Geffon <bgeffon@xxxxxxxxxx>
Cc: Christian Brauner <brauner@xxxxxxxxxx>
Cc: David Hildenbrand <david@xxxxxxxxxx>
Cc: Hugh Dickins <hughd@xxxxxxxxxx>
Cc: Jann Horn <jannh@xxxxxxxxxx>
Cc: Kalesh Singh <kaleshsingh@xxxxxxxxxx>
Cc: Liam R. Howlett <Liam.Howlett@xxxxxxxxxx>
Cc: Lokesh Gidra <lokeshgidra@xxxxxxxxxx>
Cc: Matthew Wilcox (Oracle) <willy@xxxxxxxxxxxxx>
Cc: Michal Hocko <mhocko@xxxxxxxx>
Cc: Mike Rapoport (IBM) <rppt@xxxxxxxxxx>
Cc: Nicolas Geoffray <ngeoffray@xxxxxxxxxx>
Cc: Peter Xu <peterx@xxxxxxxxxx>
Cc: Shuah Khan <shuah@xxxxxxxxxx>
Cc: ZhangPeng <zhangpeng362@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
tools/testing/selftests/mm/uffd-common.c | 13 +++++++++++++
tools/testing/selftests/mm/uffd-common.h | 7 +++++++
tools/testing/selftests/mm/uffd-unit-tests.c | 2 ++
3 files changed, 22 insertions(+)
--- a/tools/testing/selftests/mm/uffd-common.c~selftests-mm-add-uffd_test_case_ops-to-allow-test-case-specific-operations
+++ a/tools/testing/selftests/mm/uffd-common.c
@@ -17,6 +17,7 @@ bool map_shared;
bool test_uffdio_wp = true;
unsigned long long *count_verify;
uffd_test_ops_t *uffd_test_ops;
+uffd_test_case_ops_t *uffd_test_case_ops;
static int uffd_mem_fd_create(off_t mem_size, bool hugetlb)
{
@@ -298,6 +299,12 @@ int uffd_test_ctx_init(uint64_t features
unsigned long nr, cpu;
int ret;
+ if (uffd_test_case_ops && uffd_test_case_ops->pre_alloc) {
+ ret = uffd_test_case_ops->pre_alloc(errmsg);
+ if (ret)
+ return ret;
+ }
+
ret = uffd_test_ops->allocate_area((void **)&area_src, true);
ret |= uffd_test_ops->allocate_area((void **)&area_dst, false);
if (ret) {
@@ -306,6 +313,12 @@ int uffd_test_ctx_init(uint64_t features
return ret;
}
+ if (uffd_test_case_ops && uffd_test_case_ops->post_alloc) {
+ ret = uffd_test_case_ops->post_alloc(errmsg);
+ if (ret)
+ return ret;
+ }
+
ret = userfaultfd_open(&features);
if (ret) {
if (errmsg)
--- a/tools/testing/selftests/mm/uffd-common.h~selftests-mm-add-uffd_test_case_ops-to-allow-test-case-specific-operations
+++ a/tools/testing/selftests/mm/uffd-common.h
@@ -90,6 +90,12 @@ struct uffd_test_ops {
};
typedef struct uffd_test_ops uffd_test_ops_t;
+struct uffd_test_case_ops {
+ int (*pre_alloc)(const char **errmsg);
+ int (*post_alloc)(const char **errmsg);
+};
+typedef struct uffd_test_case_ops uffd_test_case_ops_t;
+
extern unsigned long nr_cpus, nr_pages, nr_pages_per_cpu, page_size;
extern char *area_src, *area_src_alias, *area_dst, *area_dst_alias, *area_remap;
extern int uffd, uffd_flags, finished, *pipefd, test_type;
@@ -102,6 +108,7 @@ extern uffd_test_ops_t anon_uffd_test_op
extern uffd_test_ops_t shmem_uffd_test_ops;
extern uffd_test_ops_t hugetlb_uffd_test_ops;
extern uffd_test_ops_t *uffd_test_ops;
+extern uffd_test_case_ops_t *uffd_test_case_ops;
void uffd_stats_report(struct uffd_args *args, int n_cpus);
int uffd_test_ctx_init(uint64_t features, const char **errmsg);
--- a/tools/testing/selftests/mm/uffd-unit-tests.c~selftests-mm-add-uffd_test_case_ops-to-allow-test-case-specific-operations
+++ a/tools/testing/selftests/mm/uffd-unit-tests.c
@@ -78,6 +78,7 @@ typedef struct {
uffd_test_fn uffd_fn;
unsigned int mem_targets;
uint64_t uffd_feature_required;
+ uffd_test_case_ops_t *test_case_ops;
} uffd_test_case_t;
static void uffd_test_report(void)
@@ -185,6 +186,7 @@ uffd_setup_environment(uffd_test_args_t
{
map_shared = mem_type->shared;
uffd_test_ops = mem_type->mem_ops;
+ uffd_test_case_ops = test->test_case_ops;
if (mem_type->mem_flag & (MEM_HUGETLB_PRIVATE | MEM_HUGETLB))
page_size = default_huge_page_size();
_
Patches currently in -mm which might be from surenb@xxxxxxxxxx are
selftests-mm-call-uffd_test_ctx_clear-at-the-end-of-the-test.patch
selftests-mm-add-uffd_test_case_ops-to-allow-test-case-specific-operations.patch
selftests-mm-add-uffdio_move-ioctl-test.patch
