diff mbox series

[09/29] selftests/mm: Reuse pagemap_get_entry() in vm_util.h

Message ID 20230330160711.3106988-1-peterx@redhat.com
State New
Headers
Series selftests/mm: Split / Refactor userfault test |

Commit Message

Peter Xu March 30, 2023, 4:07 p.m. UTC 
  Meanwhile drop pagemap_read_vaddr().

Signed-off-by: Peter Xu <peterx@redhat.com>
---
 tools/testing/selftests/mm/userfaultfd.c | 31 +++++++-----------------
 1 file changed, 9 insertions(+), 22 deletions(-)

Comments

Axel Rasmussen March 30, 2023, 9:08 p.m. UTC | #1 
On Thu, Mar 30, 2023 at 9:07 AM Peter Xu <peterx@redhat.com> wrote:
>
> Meanwhile drop pagemap_read_vaddr().
>
> Signed-off-by: Peter Xu <peterx@redhat.com>

Reviewed-by: Axel Rasmussen <axelrasmussen@google.com>

> ---
>  tools/testing/selftests/mm/userfaultfd.c | 31 +++++++-----------------
>  1 file changed, 9 insertions(+), 22 deletions(-)
>
> diff --git a/tools/testing/selftests/mm/userfaultfd.c b/tools/testing/selftests/mm/userfaultfd.c
> index 7e841f7e2884..795fbc4d84f8 100644
> --- a/tools/testing/selftests/mm/userfaultfd.c
> +++ b/tools/testing/selftests/mm/userfaultfd.c
> @@ -1399,19 +1399,6 @@ static int pagemap_open(void)
>         return fd;
>  }
>
> -static uint64_t pagemap_read_vaddr(int fd, void *vaddr)
> -{
> -       uint64_t value;
> -       int ret;
> -
> -       ret = pread(fd, &value, sizeof(uint64_t),
> -                   ((uint64_t)vaddr >> 12) * sizeof(uint64_t));
> -       if (ret != sizeof(uint64_t))
> -               err("pread() on pagemap failed");
> -
> -       return value;
> -}
> -
>  /* This macro let __LINE__ works in err() */
>  #define  pagemap_check_wp(value, wp) do {                              \
>                 if (!!(value & PM_UFFD_WP) != wp)                       \
> @@ -1427,7 +1414,7 @@ static int pagemap_test_fork(bool present)
>         if (!child) {
>                 /* Open the pagemap fd of the child itself */
>                 fd = pagemap_open();
> -               value = pagemap_read_vaddr(fd, area_dst);
> +               value = pagemap_get_entry(fd, area_dst);
>                 /*
>                  * After fork() uffd-wp bit should be gone as long as we're
>                  * without UFFD_FEATURE_EVENT_FORK
> @@ -1446,24 +1433,24 @@ static void userfaultfd_wp_unpopulated_test(int pagemap_fd)
>
>         /* Test applying pte marker to anon unpopulated */
>         wp_range(uffd, (uint64_t)area_dst, page_size, true);
> -       value = pagemap_read_vaddr(pagemap_fd, area_dst);
> +       value = pagemap_get_entry(pagemap_fd, area_dst);
>         pagemap_check_wp(value, true);
>
>         /* Test unprotect on anon pte marker */
>         wp_range(uffd, (uint64_t)area_dst, page_size, false);
> -       value = pagemap_read_vaddr(pagemap_fd, area_dst);
> +       value = pagemap_get_entry(pagemap_fd, area_dst);
>         pagemap_check_wp(value, false);
>
>         /* Test zap on anon marker */
>         wp_range(uffd, (uint64_t)area_dst, page_size, true);
>         if (madvise(area_dst, page_size, MADV_DONTNEED))
>                 err("madvise(MADV_DONTNEED) failed");
> -       value = pagemap_read_vaddr(pagemap_fd, area_dst);
> +       value = pagemap_get_entry(pagemap_fd, area_dst);
>         pagemap_check_wp(value, false);
>
>         /* Test fault in after marker removed */
>         *area_dst = 1;
> -       value = pagemap_read_vaddr(pagemap_fd, area_dst);
> +       value = pagemap_get_entry(pagemap_fd, area_dst);
>         pagemap_check_wp(value, false);
>         /* Drop it to make pte none again */
>         if (madvise(area_dst, page_size, MADV_DONTNEED))
> @@ -1522,7 +1509,7 @@ static void userfaultfd_pagemap_test(unsigned int test_pgsize)
>         /* Touch the page */
>         *area_dst = 1;
>         wp_range(uffd, (uint64_t)area_dst, test_pgsize, true);
> -       value = pagemap_read_vaddr(pagemap_fd, area_dst);
> +       value = pagemap_get_entry(pagemap_fd, area_dst);
>         pagemap_check_wp(value, true);
>         /* Make sure uffd-wp bit dropped when fork */
>         if (pagemap_test_fork(true))
> @@ -1536,7 +1523,7 @@ static void userfaultfd_pagemap_test(unsigned int test_pgsize)
>                 err("madvise(MADV_PAGEOUT) failed");
>
>         /* Uffd-wp should persist even swapped out */
> -       value = pagemap_read_vaddr(pagemap_fd, area_dst);
> +       value = pagemap_get_entry(pagemap_fd, area_dst);
>         pagemap_check_wp(value, true);
>         /* Make sure uffd-wp bit dropped when fork */
>         if (pagemap_test_fork(false))
> @@ -1544,12 +1531,12 @@ static void userfaultfd_pagemap_test(unsigned int test_pgsize)
>
>         /* Unprotect; this tests swap pte modifications */
>         wp_range(uffd, (uint64_t)area_dst, page_size, false);
> -       value = pagemap_read_vaddr(pagemap_fd, area_dst);
> +       value = pagemap_get_entry(pagemap_fd, area_dst);
>         pagemap_check_wp(value, false);
>
>         /* Fault in the page from disk */
>         *area_dst = 2;
> -       value = pagemap_read_vaddr(pagemap_fd, area_dst);
> +       value = pagemap_get_entry(pagemap_fd, area_dst);
>         pagemap_check_wp(value, false);
>
>         close(pagemap_fd);
> --
> 2.39.1
>
Mike Kravetz March 31, 2023, 6:27 p.m. UTC | #2 
On 03/30/23 12:07, Peter Xu wrote:
> Meanwhile drop pagemap_read_vaddr().
> 
> Signed-off-by: Peter Xu <peterx@redhat.com>
> ---
>  tools/testing/selftests/mm/userfaultfd.c | 31 +++++++-----------------
>  1 file changed, 9 insertions(+), 22 deletions(-)

Thanks,

Reviewed-by: Mike Kravetz <mike.kravetz@oracle.com>
David Hildenbrand April 3, 2023, 7:54 a.m. UTC | #3 
On 30.03.23 18:07, Peter Xu wrote:
> Meanwhile drop pagemap_read_vaddr().
> 
> Signed-off-by: Peter Xu <peterx@redhat.com>
> ---

Reviewed-by: David Hildenbrand <david@redhat.com>
Mike Rapoport April 7, 2023, 9:32 a.m. UTC | #4 
On Thu, Mar 30, 2023 at 12:07:11PM -0400, Peter Xu wrote:
> Subject: selftests/mm: Reuse pagemap_get_entry() in vm_util.h

Nit: selftests/mm/uffd:

> Meanwhile drop pagemap_read_vaddr().
> 
> Signed-off-by: Peter Xu <peterx@redhat.com>

Reviewed-by: Mike Rapoport (IBM) <rppt@kernel.org>

> ---
>  tools/testing/selftests/mm/userfaultfd.c | 31 +++++++-----------------
>  1 file changed, 9 insertions(+), 22 deletions(-)
> 
> diff --git a/tools/testing/selftests/mm/userfaultfd.c b/tools/testing/selftests/mm/userfaultfd.c
> index 7e841f7e2884..795fbc4d84f8 100644
> --- a/tools/testing/selftests/mm/userfaultfd.c
> +++ b/tools/testing/selftests/mm/userfaultfd.c
> @@ -1399,19 +1399,6 @@ static int pagemap_open(void)
>  	return fd;
>  }
> 
> -static uint64_t pagemap_read_vaddr(int fd, void *vaddr)
> -{
> -	uint64_t value;
> -	int ret;
> -
> -	ret = pread(fd, &value, sizeof(uint64_t),
> -		    ((uint64_t)vaddr >> 12) * sizeof(uint64_t));
> -	if (ret != sizeof(uint64_t))
> -		err("pread() on pagemap failed");
> -
> -	return value;
> -}
> -
>  /* This macro let __LINE__ works in err() */
>  #define  pagemap_check_wp(value, wp) do {				\
>  		if (!!(value & PM_UFFD_WP) != wp)			\
> @@ -1427,7 +1414,7 @@ static int pagemap_test_fork(bool present)
>  	if (!child) {
>  		/* Open the pagemap fd of the child itself */
>  		fd = pagemap_open();
> -		value = pagemap_read_vaddr(fd, area_dst);
> +		value = pagemap_get_entry(fd, area_dst);
>  		/*
>  		 * After fork() uffd-wp bit should be gone as long as we're
>  		 * without UFFD_FEATURE_EVENT_FORK
> @@ -1446,24 +1433,24 @@ static void userfaultfd_wp_unpopulated_test(int pagemap_fd)
> 
>  	/* Test applying pte marker to anon unpopulated */
>  	wp_range(uffd, (uint64_t)area_dst, page_size, true);
> -	value = pagemap_read_vaddr(pagemap_fd, area_dst);
> +	value = pagemap_get_entry(pagemap_fd, area_dst);
>  	pagemap_check_wp(value, true);
> 
>  	/* Test unprotect on anon pte marker */
>  	wp_range(uffd, (uint64_t)area_dst, page_size, false);
> -	value = pagemap_read_vaddr(pagemap_fd, area_dst);
> +	value = pagemap_get_entry(pagemap_fd, area_dst);
>  	pagemap_check_wp(value, false);
> 
>  	/* Test zap on anon marker */
>  	wp_range(uffd, (uint64_t)area_dst, page_size, true);
>  	if (madvise(area_dst, page_size, MADV_DONTNEED))
>  		err("madvise(MADV_DONTNEED) failed");
> -	value = pagemap_read_vaddr(pagemap_fd, area_dst);
> +	value = pagemap_get_entry(pagemap_fd, area_dst);
>  	pagemap_check_wp(value, false);
> 
>  	/* Test fault in after marker removed */
>  	*area_dst = 1;
> -	value = pagemap_read_vaddr(pagemap_fd, area_dst);
> +	value = pagemap_get_entry(pagemap_fd, area_dst);
>  	pagemap_check_wp(value, false);
>  	/* Drop it to make pte none again */
>  	if (madvise(area_dst, page_size, MADV_DONTNEED))
> @@ -1522,7 +1509,7 @@ static void userfaultfd_pagemap_test(unsigned int test_pgsize)
>  	/* Touch the page */
>  	*area_dst = 1;
>  	wp_range(uffd, (uint64_t)area_dst, test_pgsize, true);
> -	value = pagemap_read_vaddr(pagemap_fd, area_dst);
> +	value = pagemap_get_entry(pagemap_fd, area_dst);
>  	pagemap_check_wp(value, true);
>  	/* Make sure uffd-wp bit dropped when fork */
>  	if (pagemap_test_fork(true))
> @@ -1536,7 +1523,7 @@ static void userfaultfd_pagemap_test(unsigned int test_pgsize)
>  		err("madvise(MADV_PAGEOUT) failed");
> 
>  	/* Uffd-wp should persist even swapped out */
> -	value = pagemap_read_vaddr(pagemap_fd, area_dst);
> +	value = pagemap_get_entry(pagemap_fd, area_dst);
>  	pagemap_check_wp(value, true);
>  	/* Make sure uffd-wp bit dropped when fork */
>  	if (pagemap_test_fork(false))
> @@ -1544,12 +1531,12 @@ static void userfaultfd_pagemap_test(unsigned int test_pgsize)
> 
>  	/* Unprotect; this tests swap pte modifications */
>  	wp_range(uffd, (uint64_t)area_dst, page_size, false);
> -	value = pagemap_read_vaddr(pagemap_fd, area_dst);
> +	value = pagemap_get_entry(pagemap_fd, area_dst);
>  	pagemap_check_wp(value, false);
> 
>  	/* Fault in the page from disk */
>  	*area_dst = 2;
> -	value = pagemap_read_vaddr(pagemap_fd, area_dst);
> +	value = pagemap_get_entry(pagemap_fd, area_dst);
>  	pagemap_check_wp(value, false);
> 
>  	close(pagemap_fd);
> -- 
> 2.39.1
>
diff mbox series

Patch

diff --git a/tools/testing/selftests/mm/userfaultfd.c b/tools/testing/selftests/mm/userfaultfd.c
index 7e841f7e2884..795fbc4d84f8 100644
--- a/tools/testing/selftests/mm/userfaultfd.c
+++ b/tools/testing/selftests/mm/userfaultfd.c
@@ -1399,19 +1399,6 @@  static int pagemap_open(void)
 	return fd;
 }
 
-static uint64_t pagemap_read_vaddr(int fd, void *vaddr)
-{
-	uint64_t value;
-	int ret;
-
-	ret = pread(fd, &value, sizeof(uint64_t),
-		    ((uint64_t)vaddr >> 12) * sizeof(uint64_t));
-	if (ret != sizeof(uint64_t))
-		err("pread() on pagemap failed");
-
-	return value;
-}
-
 /* This macro let __LINE__ works in err() */
 #define  pagemap_check_wp(value, wp) do {				\
 		if (!!(value & PM_UFFD_WP) != wp)			\
@@ -1427,7 +1414,7 @@  static int pagemap_test_fork(bool present)
 	if (!child) {
 		/* Open the pagemap fd of the child itself */
 		fd = pagemap_open();
-		value = pagemap_read_vaddr(fd, area_dst);
+		value = pagemap_get_entry(fd, area_dst);
 		/*
 		 * After fork() uffd-wp bit should be gone as long as we're
 		 * without UFFD_FEATURE_EVENT_FORK
@@ -1446,24 +1433,24 @@  static void userfaultfd_wp_unpopulated_test(int pagemap_fd)
 
 	/* Test applying pte marker to anon unpopulated */
 	wp_range(uffd, (uint64_t)area_dst, page_size, true);
-	value = pagemap_read_vaddr(pagemap_fd, area_dst);
+	value = pagemap_get_entry(pagemap_fd, area_dst);
 	pagemap_check_wp(value, true);
 
 	/* Test unprotect on anon pte marker */
 	wp_range(uffd, (uint64_t)area_dst, page_size, false);
-	value = pagemap_read_vaddr(pagemap_fd, area_dst);
+	value = pagemap_get_entry(pagemap_fd, area_dst);
 	pagemap_check_wp(value, false);
 
 	/* Test zap on anon marker */
 	wp_range(uffd, (uint64_t)area_dst, page_size, true);
 	if (madvise(area_dst, page_size, MADV_DONTNEED))
 		err("madvise(MADV_DONTNEED) failed");
-	value = pagemap_read_vaddr(pagemap_fd, area_dst);
+	value = pagemap_get_entry(pagemap_fd, area_dst);
 	pagemap_check_wp(value, false);
 
 	/* Test fault in after marker removed */
 	*area_dst = 1;
-	value = pagemap_read_vaddr(pagemap_fd, area_dst);
+	value = pagemap_get_entry(pagemap_fd, area_dst);
 	pagemap_check_wp(value, false);
 	/* Drop it to make pte none again */
 	if (madvise(area_dst, page_size, MADV_DONTNEED))
@@ -1522,7 +1509,7 @@  static void userfaultfd_pagemap_test(unsigned int test_pgsize)
 	/* Touch the page */
 	*area_dst = 1;
 	wp_range(uffd, (uint64_t)area_dst, test_pgsize, true);
-	value = pagemap_read_vaddr(pagemap_fd, area_dst);
+	value = pagemap_get_entry(pagemap_fd, area_dst);
 	pagemap_check_wp(value, true);
 	/* Make sure uffd-wp bit dropped when fork */
 	if (pagemap_test_fork(true))
@@ -1536,7 +1523,7 @@  static void userfaultfd_pagemap_test(unsigned int test_pgsize)
 		err("madvise(MADV_PAGEOUT) failed");
 
 	/* Uffd-wp should persist even swapped out */
-	value = pagemap_read_vaddr(pagemap_fd, area_dst);
+	value = pagemap_get_entry(pagemap_fd, area_dst);
 	pagemap_check_wp(value, true);
 	/* Make sure uffd-wp bit dropped when fork */
 	if (pagemap_test_fork(false))
@@ -1544,12 +1531,12 @@  static void userfaultfd_pagemap_test(unsigned int test_pgsize)
 
 	/* Unprotect; this tests swap pte modifications */
 	wp_range(uffd, (uint64_t)area_dst, page_size, false);
-	value = pagemap_read_vaddr(pagemap_fd, area_dst);
+	value = pagemap_get_entry(pagemap_fd, area_dst);
 	pagemap_check_wp(value, false);
 
 	/* Fault in the page from disk */
 	*area_dst = 2;
-	value = pagemap_read_vaddr(pagemap_fd, area_dst);
+	value = pagemap_get_entry(pagemap_fd, area_dst);
 	pagemap_check_wp(value, false);
 
 	close(pagemap_fd);