From: Peter Xu <peterx@redhat.com>
To: linux-mm@kvack.org, linux-kernel@vger.kernel.org
Cc: Nadav Amit <nadav.amit@gmail.com>,
Mike Rapoport <rppt@linux.vnet.ibm.com>,
Leonardo Bras Soares Passos <lsoaresp@redhat.com>,
peterx@redhat.com, David Hildenbrand <david@redhat.com>,
Axel Rasmussen <axelrasmussen@google.com>,
Andrea Arcangeli <aarcange@redhat.com>,
Mike Kravetz <mike.kravetz@oracle.com>,
Andrew Morton <akpm@linux-foundation.org>
Subject: [PATCH v2 28/31] selftests/mm: Allow uffd test to skip properly with no privilege
Date: Wed, 12 Apr 2023 12:45:20 -0400 [thread overview]
Message-ID: <20230412164520.329163-1-peterx@redhat.com> (raw)
In-Reply-To: <20230412163922.327282-1-peterx@redhat.com>
Allow skip a unit test properly due to no privilege (e.g. sigbus and events
tests).
Signed-off-by: Peter Xu <peterx@redhat.com>
---
tools/testing/selftests/mm/uffd-common.c | 27 ++++++++++++--------
tools/testing/selftests/mm/uffd-common.h | 4 +--
tools/testing/selftests/mm/uffd-stress.c | 6 +++--
tools/testing/selftests/mm/uffd-unit-tests.c | 10 +++++---
4 files changed, 29 insertions(+), 18 deletions(-)
diff --git a/tools/testing/selftests/mm/uffd-common.c b/tools/testing/selftests/mm/uffd-common.c
index 12ac84712a38..3e98e129f8bd 100644
--- a/tools/testing/selftests/mm/uffd-common.c
+++ b/tools/testing/selftests/mm/uffd-common.c
@@ -232,7 +232,7 @@ void uffd_stats_report(struct uffd_args *args, int n_cpus)
printf("\n");
}
-void userfaultfd_open(uint64_t *features)
+int userfaultfd_open(uint64_t *features)
{
struct uffdio_api uffdio_api;
@@ -241,18 +241,19 @@ void userfaultfd_open(uint64_t *features)
else
uffd = uffd_open_sys(UFFD_FLAGS);
if (uffd < 0)
- err("uffd open failed (dev=%d)", test_dev_userfaultfd);
+ return -1;
uffd_flags = fcntl(uffd, F_GETFD, NULL);
uffdio_api.api = UFFD_API;
uffdio_api.features = *features;
if (ioctl(uffd, UFFDIO_API, &uffdio_api))
- err("UFFDIO_API failed.\nPlease make sure to "
- "run with either root or ptrace capability.");
+ /* Probably lack of CAP_PTRACE? */
+ return -1;
if (uffdio_api.api != UFFD_API)
err("UFFDIO_API error: %" PRIu64, (uint64_t)uffdio_api.api);
*features = uffdio_api.features;
+ return 0;
}
static inline void munmap_area(void **area)
@@ -295,7 +296,7 @@ static void uffd_test_ctx_clear(void)
munmap_area((void **)&area_remap);
}
-int uffd_test_ctx_init(uint64_t features)
+int uffd_test_ctx_init(uint64_t features, const char **errmsg)
{
unsigned long nr, cpu;
int ret;
@@ -303,13 +304,19 @@ int uffd_test_ctx_init(uint64_t features)
uffd_test_ctx_clear();
ret = uffd_test_ops->allocate_area((void **)&area_src, true);
- if (ret)
- return ret;
- ret = uffd_test_ops->allocate_area((void **)&area_dst, false);
- if (ret)
+ ret |= uffd_test_ops->allocate_area((void **)&area_dst, false);
+ if (ret) {
+ if (errmsg)
+ *errmsg = "memory allocation failed";
return ret;
+ }
- userfaultfd_open(&features);
+ ret = userfaultfd_open(&features);
+ if (ret) {
+ if (errmsg)
+ *errmsg = "possible lack of priviledge";
+ return ret;
+ }
count_verify = malloc(nr_pages * sizeof(unsigned long long));
if (!count_verify)
diff --git a/tools/testing/selftests/mm/uffd-common.h b/tools/testing/selftests/mm/uffd-common.h
index 4bd5915cf5b4..32e590ce9442 100644
--- a/tools/testing/selftests/mm/uffd-common.h
+++ b/tools/testing/selftests/mm/uffd-common.h
@@ -101,8 +101,8 @@ extern uffd_test_ops_t hugetlb_uffd_test_ops;
extern uffd_test_ops_t *uffd_test_ops;
void uffd_stats_report(struct uffd_args *args, int n_cpus);
-int uffd_test_ctx_init(uint64_t features);
-void userfaultfd_open(uint64_t *features);
+int uffd_test_ctx_init(uint64_t features, const char **errmsg);
+int userfaultfd_open(uint64_t *features);
int uffd_read_msg(int ufd, struct uffd_msg *msg);
void wp_range(int ufd, __u64 start, __u64 len, bool wp);
void uffd_handle_page_fault(struct uffd_msg *msg, struct uffd_args *args);
diff --git a/tools/testing/selftests/mm/uffd-stress.c b/tools/testing/selftests/mm/uffd-stress.c
index d78f88850011..c0e804f05002 100644
--- a/tools/testing/selftests/mm/uffd-stress.c
+++ b/tools/testing/selftests/mm/uffd-stress.c
@@ -271,7 +271,8 @@ static int userfaultfd_stress(void)
struct uffd_args args[nr_cpus];
uint64_t mem_size = nr_pages * page_size;
- uffd_test_ctx_init(UFFD_FEATURE_WP_UNPOPULATED);
+ if (uffd_test_ctx_init(UFFD_FEATURE_WP_UNPOPULATED, NULL))
+ err("context init failed");
if (posix_memalign(&area, page_size, page_size))
err("out of memory");
@@ -435,7 +436,8 @@ static void parse_test_type_arg(const char *raw_type)
* feature.
*/
- userfaultfd_open(&features);
+ if (userfaultfd_open(&features))
+ err("Userfaultfd open failed");
test_uffdio_wp = test_uffdio_wp &&
(features & UFFD_FEATURE_PAGEFAULT_FLAG_WP);
diff --git a/tools/testing/selftests/mm/uffd-unit-tests.c b/tools/testing/selftests/mm/uffd-unit-tests.c
index a33d6c928eeb..b0acf558e8cb 100644
--- a/tools/testing/selftests/mm/uffd-unit-tests.c
+++ b/tools/testing/selftests/mm/uffd-unit-tests.c
@@ -172,7 +172,8 @@ static int test_uffd_api(bool use_dev)
* This function initializes the global variables. TODO: remove global
* vars and then remove this.
*/
-static int uffd_setup_environment(uffd_test_case_t *test, mem_type_t *mem_type)
+static int uffd_setup_environment(uffd_test_case_t *test, mem_type_t *mem_type,
+ const char **errmsg)
{
map_shared = mem_type->shared;
uffd_test_ops = mem_type->mem_ops;
@@ -186,7 +187,7 @@ static int uffd_setup_environment(uffd_test_case_t *test, mem_type_t *mem_type)
/* TODO: remove this global var.. it's so ugly */
nr_cpus = 1;
- return uffd_test_ctx_init(test->uffd_feature_required);
+ return uffd_test_ctx_init(test->uffd_feature_required, errmsg);
}
static bool uffd_feature_supported(uffd_test_case_t *test)
@@ -835,6 +836,7 @@ int main(int argc, char *argv[])
uffd_test_case_t *test;
mem_type_t *mem_type;
char test_name[128];
+ const char *errmsg;
int has_uffd;
int i, j;
@@ -860,8 +862,8 @@ int main(int argc, char *argv[])
uffd_test_skip("feature missing");
continue;
}
- if (uffd_setup_environment(test, mem_type)) {
- uffd_test_skip("environment setup failed");
+ if (uffd_setup_environment(test, mem_type, &errmsg)) {
+ uffd_test_skip(errmsg);
continue;
}
test->uffd_fn();
--
2.39.1
next prev parent reply other threads:[~2023-04-12 16:45 UTC|newest]
Thread overview: 43+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-04-12 16:38 [PATCH v2 00/31] selftests/mm: Split / Refactor userfault test Peter Xu
2023-04-12 16:38 ` [PATCH v2 01/31] Revert "userfaultfd: don't fail on unrecognized features" Peter Xu
2023-04-12 16:41 ` [PATCH v2 02/31] selftests/mm: Update .gitignore with two missing tests Peter Xu
2023-04-12 16:41 ` [PATCH v2 03/31] selftests/mm: Dump a summary in run_vmtests.sh Peter Xu
2023-04-12 16:41 ` [PATCH v2 04/31] selftests/mm: Merge util.h into vm_util.h Peter Xu
2023-04-12 16:42 ` [PATCH v2 05/31] selftests/mm: Use TEST_GEN_PROGS where proper Peter Xu
2023-04-15 15:44 ` Lorenzo Stoakes
2023-04-12 16:42 ` [PATCH v2 06/31] selftests/mm: Link vm_util.c always Peter Xu
2023-04-12 16:42 ` [PATCH v2 07/31] selftests/mm: Merge default_huge_page_size() into one Peter Xu
2023-04-12 16:42 ` [PATCH v2 08/31] selftests/mm: Use PM_* macros in vm_utils.h Peter Xu
2023-04-12 16:42 ` [PATCH v2 09/31] selftests/mm: Reuse pagemap_get_entry() in vm_util.h Peter Xu
2023-04-12 16:42 ` [PATCH v2 10/31] selftests/mm: Test UFFDIO_ZEROPAGE only when !hugetlb Peter Xu
2023-04-12 17:07 ` Axel Rasmussen
2023-04-12 16:42 ` [PATCH v2 11/31] selftests/mm: Drop test_uffdio_zeropage_eexist Peter Xu
2023-04-12 16:42 ` [PATCH v2 12/31] selftests/mm: Create uffd-common.[ch] Peter Xu
2023-04-12 17:59 ` Axel Rasmussen
2023-04-12 16:42 ` [PATCH v2 13/31] selftests/mm: Split uffd tests into uffd-stress and uffd-unit-tests Peter Xu
2023-04-12 18:03 ` Axel Rasmussen
2023-04-12 16:42 ` [PATCH v2 14/31] selftests/mm: uffd_[un]register() Peter Xu
2023-04-12 18:20 ` Axel Rasmussen
2023-04-12 19:33 ` Peter Xu
2023-04-12 16:42 ` [PATCH v2 15/31] selftests/mm: uffd_open_{dev|sys}() Peter Xu
2023-04-12 18:25 ` Axel Rasmussen
2023-04-12 16:42 ` [PATCH v2 16/31] selftests/mm: UFFDIO_API test Peter Xu
2023-04-12 19:47 ` Axel Rasmussen
2023-04-12 20:08 ` Peter Xu
2023-04-20 10:54 ` Mike Rapoport
2023-04-12 16:43 ` [PATCH v2 17/31] selftests/mm: Drop global mem_fd in uffd tests Peter Xu
2023-04-12 16:43 ` [PATCH v2 18/31] selftests/mm: Drop global hpage_size " Peter Xu
2023-04-12 16:43 ` [PATCH v2 19/31] selftests/mm: Rename uffd_stats to uffd_args Peter Xu
2023-04-20 10:55 ` Mike Rapoport
2023-04-12 16:43 ` [PATCH v2 20/31] selftests/mm: Let uffd_handle_page_fault() take wp parameter Peter Xu
2023-04-12 16:43 ` [PATCH v2 21/31] selftests/mm: Allow allocate_area() to fail properly Peter Xu
2023-04-12 16:43 ` [PATCH v2 22/31] selftests/mm: Add framework for uffd-unit-test Peter Xu
2023-04-12 16:43 ` [PATCH v2 23/31] selftests/mm: Move uffd pagemap test to unit test Peter Xu
2023-04-12 16:43 ` [PATCH v2 24/31] selftests/mm: Move uffd minor " Peter Xu
2023-04-12 16:44 ` [PATCH v2 25/31] selftests/mm: Move uffd sig/events tests into uffd unit tests Peter Xu
2023-04-12 16:44 ` [PATCH v2 26/31] selftests/mm: Move zeropage test " Peter Xu
2023-04-12 16:45 ` [PATCH v2 27/31] selftests/mm: Workaround no way to detect uffd-minor + wp Peter Xu
2023-04-12 16:45 ` Peter Xu [this message]
2023-04-12 16:45 ` [PATCH v2 29/31] selftests/mm: Drop sys/dev test in uffd-stress test Peter Xu
2023-04-12 16:45 ` [PATCH v2 30/31] selftests/mm: Add shmem-private test to uffd-stress Peter Xu
2023-04-12 16:45 ` [PATCH v2 31/31] selftests/mm: Add uffdio register ioctls test Peter Xu
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