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mm: update uffd-stress to handle EINVAL for unset config features

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Now that we have updated userfaultfd_api to correctly return EINVAL when a
feature is requested but not available, let's fix the uffd-stress test to
only set the UFFD_FEATURE_WP_UNPOPULATED feature when the config is set. 
In addition, still run the test if the CONFIG_PTE_MARKER_UFFD_WP is not
set, just dont use the corresponding UFFD_FEATURE_WP_UNPOPULATED feature.

Link: https://lkml.kernel.org/r/20240626130513.120193-2-audra@redhat.com
Signed-off-by: Audra Mitchell <audra@redhat.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Cc: Christian Brauner <brauner@kernel.org>
Cc: Jan Kara <jack@suse.cz>
Cc: Mike Rapoport <rppt@linux.vnet.ibm.com>
Cc: Peter Xu <peterx@redhat.com>
Cc: Rafael Aquini <raquini@redhat.com>
Cc: Shaohua Li <shli@fb.com>
Cc: Shuah Khan <shuah@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Audra Mitchell 2024-06-26 09:05:12 -04:00 committed by Andrew Morton
parent 8ac5dc6659
commit a47a7af9b5
1 changed files with 9 additions and 5 deletions
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14
tools/testing/selftests/mm/uffd-stress.c
View file

@ -36,6 +36,8 @@
#include <asm-generic/unistd.h>
#include "uffd-common.h"
uint64_t features;
#define BOUNCE_RANDOM (1<<0)
#define BOUNCE_RACINGFAULTS (1<<1)
#define BOUNCE_VERIFY (1<<2)
@ -245,10 +247,14 @@ static int userfaultfd_stress(void)
unsigned long nr;
struct uffd_args args[nr_cpus];
uint64_t mem_size = nr_pages * page_size;
int flags = 0;
memset(args, 0, sizeof(struct uffd_args) * nr_cpus);
if (uffd_test_ctx_init(UFFD_FEATURE_WP_UNPOPULATED, NULL))
if (features & UFFD_FEATURE_WP_UNPOPULATED && test_type == TEST_ANON)
flags = UFFD_FEATURE_WP_UNPOPULATED;
if (uffd_test_ctx_init(flags, NULL))
err("context init failed");
if (posix_memalign(&area, page_size, page_size))
@ -383,8 +389,6 @@ static void set_test_type(const char *type)
static void parse_test_type_arg(const char *raw_type)
{
uint64_t features = UFFD_API_FEATURES;
set_test_type(raw_type);
if (!test_type)
@ -407,8 +411,8 @@ static void parse_test_type_arg(const char *raw_type)
* feature.
*/
if (userfaultfd_open(&features))
err("Userfaultfd open failed");
if (uffd_get_features(&features))
err("failed to get available features");
test_uffdio_wp = test_uffdio_wp &&
(features & UFFD_FEATURE_PAGEFAULT_FLAG_WP);