From: Vlastimil Babka <vbabka@suse.cz>
To: Matthew Wilcox <willy@infradead.org>,
Christoph Lameter <cl@linux.com>,
David Rientjes <rientjes@google.com>,
Joonsoo Kim <iamjoonsoo.kim@lge.com>,
Pekka Enberg <penberg@kernel.org>
Cc: linux-mm@kvack.org, Andrew Morton <akpm@linux-foundation.org>,
patches@lists.linux.dev, Vlastimil Babka <vbabka@suse.cz>,
Julia Lawall <julia.lawall@inria.fr>,
Luis Chamberlain <mcgrof@kernel.org>,
Andrey Ryabinin <ryabinin.a.a@gmail.com>,
Alexander Potapenko <glider@google.com>,
Andrey Konovalov <andreyknvl@gmail.com>,
Dmitry Vyukov <dvyukov@google.com>,
Marco Elver <elver@google.com>,
Johannes Weiner <hannes@cmpxchg.org>,
Michal Hocko <mhocko@kernel.org>,
Vladimir Davydov <vdavydov.dev@gmail.com>,
kasan-dev@googlegroups.com, cgroups@vger.kernel.org
Subject: [PATCH v2 22/33] mm: Convert struct page to struct slab in functions used by other subsystems
Date: Wed, 1 Dec 2021 19:14:59 +0100 [thread overview]
Message-ID: <20211201181510.18784-23-vbabka@suse.cz> (raw)
In-Reply-To: <20211201181510.18784-1-vbabka@suse.cz>
KASAN, KFENCE and memcg interact with SLAB or SLUB internals through functions
nearest_obj(), obj_to_index() and objs_per_slab() that use struct page as
parameter. This patch converts it to struct slab including all callers, through
a coccinelle semantic patch.
// Options: --include-headers --no-includes --smpl-spacing include/linux/slab_def.h include/linux/slub_def.h mm/slab.h mm/kasan/*.c mm/kfence/kfence_test.c mm/memcontrol.c mm/slab.c mm/slub.c
// Note: needs coccinelle 1.1.1 to avoid breaking whitespace
@@
@@
-objs_per_slab_page(
+objs_per_slab(
...
)
{ ... }
@@
@@
-objs_per_slab_page(
+objs_per_slab(
...
)
@@
identifier fn =~ "obj_to_index|objs_per_slab";
@@
fn(...,
- const struct page *page
+ const struct slab *slab
,...)
{
<...
(
- page_address(page)
+ slab_address(slab)
|
- page
+ slab
)
...>
}
@@
identifier fn =~ "nearest_obj";
@@
fn(...,
- struct page *page
+ const struct slab *slab
,...)
{
<...
(
- page_address(page)
+ slab_address(slab)
|
- page
+ slab
)
...>
}
@@
identifier fn =~ "nearest_obj|obj_to_index|objs_per_slab";
expression E;
@@
fn(...,
(
- slab_page(E)
+ E
|
- virt_to_page(E)
+ virt_to_slab(E)
|
- virt_to_head_page(E)
+ virt_to_slab(E)
|
- page
+ page_slab(page)
)
,...)
Signed-off-by: Vlastimil Babka <vbabka@suse.cz>
Cc: Julia Lawall <julia.lawall@inria.fr>
Cc: Luis Chamberlain <mcgrof@kernel.org>
Cc: Andrey Ryabinin <ryabinin.a.a@gmail.com>
Cc: Alexander Potapenko <glider@google.com>
Cc: Andrey Konovalov <andreyknvl@gmail.com>
Cc: Dmitry Vyukov <dvyukov@google.com>
Cc: Marco Elver <elver@google.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Michal Hocko <mhocko@kernel.org>
Cc: Vladimir Davydov <vdavydov.dev@gmail.com>
Cc: <kasan-dev@googlegroups.com>
Cc: <cgroups@vger.kernel.org>
---
include/linux/slab_def.h | 16 ++++++++--------
include/linux/slub_def.h | 18 +++++++++---------
mm/kasan/common.c | 4 ++--
mm/kasan/generic.c | 2 +-
mm/kasan/report.c | 2 +-
mm/kasan/report_tags.c | 2 +-
mm/kfence/kfence_test.c | 4 ++--
mm/memcontrol.c | 4 ++--
mm/slab.c | 10 +++++-----
mm/slab.h | 4 ++--
mm/slub.c | 2 +-
11 files changed, 34 insertions(+), 34 deletions(-)
diff --git a/include/linux/slab_def.h b/include/linux/slab_def.h
index 3aa5e1e73ab6..e24c9aff6fed 100644
--- a/include/linux/slab_def.h
+++ b/include/linux/slab_def.h
@@ -87,11 +87,11 @@ struct kmem_cache {
struct kmem_cache_node *node[MAX_NUMNODES];
};
-static inline void *nearest_obj(struct kmem_cache *cache, struct page *page,
+static inline void *nearest_obj(struct kmem_cache *cache, const struct slab *slab,
void *x)
{
- void *object = x - (x - page->s_mem) % cache->size;
- void *last_object = page->s_mem + (cache->num - 1) * cache->size;
+ void *object = x - (x - slab->s_mem) % cache->size;
+ void *last_object = slab->s_mem + (cache->num - 1) * cache->size;
if (unlikely(object > last_object))
return last_object;
@@ -106,16 +106,16 @@ static inline void *nearest_obj(struct kmem_cache *cache, struct page *page,
* reciprocal_divide(offset, cache->reciprocal_buffer_size)
*/
static inline unsigned int obj_to_index(const struct kmem_cache *cache,
- const struct page *page, void *obj)
+ const struct slab *slab, void *obj)
{
- u32 offset = (obj - page->s_mem);
+ u32 offset = (obj - slab->s_mem);
return reciprocal_divide(offset, cache->reciprocal_buffer_size);
}
-static inline int objs_per_slab_page(const struct kmem_cache *cache,
- const struct page *page)
+static inline int objs_per_slab(const struct kmem_cache *cache,
+ const struct slab *slab)
{
- if (is_kfence_address(page_address(page)))
+ if (is_kfence_address(slab_address(slab)))
return 1;
return cache->num;
}
diff --git a/include/linux/slub_def.h b/include/linux/slub_def.h
index 8a9c2876ca89..33c5c0e3bd8d 100644
--- a/include/linux/slub_def.h
+++ b/include/linux/slub_def.h
@@ -158,11 +158,11 @@ static inline void sysfs_slab_release(struct kmem_cache *s)
void *fixup_red_left(struct kmem_cache *s, void *p);
-static inline void *nearest_obj(struct kmem_cache *cache, struct page *page,
+static inline void *nearest_obj(struct kmem_cache *cache, const struct slab *slab,
void *x) {
- void *object = x - (x - page_address(page)) % cache->size;
- void *last_object = page_address(page) +
- (page->objects - 1) * cache->size;
+ void *object = x - (x - slab_address(slab)) % cache->size;
+ void *last_object = slab_address(slab) +
+ (slab->objects - 1) * cache->size;
void *result = (unlikely(object > last_object)) ? last_object : object;
result = fixup_red_left(cache, result);
@@ -178,16 +178,16 @@ static inline unsigned int __obj_to_index(const struct kmem_cache *cache,
}
static inline unsigned int obj_to_index(const struct kmem_cache *cache,
- const struct page *page, void *obj)
+ const struct slab *slab, void *obj)
{
if (is_kfence_address(obj))
return 0;
- return __obj_to_index(cache, page_address(page), obj);
+ return __obj_to_index(cache, slab_address(slab), obj);
}
-static inline int objs_per_slab_page(const struct kmem_cache *cache,
- const struct page *page)
+static inline int objs_per_slab(const struct kmem_cache *cache,
+ const struct slab *slab)
{
- return page->objects;
+ return slab->objects;
}
#endif /* _LINUX_SLUB_DEF_H */
diff --git a/mm/kasan/common.c b/mm/kasan/common.c
index 8428da2aaf17..6a1cd2d38bff 100644
--- a/mm/kasan/common.c
+++ b/mm/kasan/common.c
@@ -298,7 +298,7 @@ static inline u8 assign_tag(struct kmem_cache *cache,
/* For caches that either have a constructor or SLAB_TYPESAFE_BY_RCU: */
#ifdef CONFIG_SLAB
/* For SLAB assign tags based on the object index in the freelist. */
- return (u8)obj_to_index(cache, virt_to_head_page(object), (void *)object);
+ return (u8)obj_to_index(cache, virt_to_slab(object), (void *)object);
#else
/*
* For SLUB assign a random tag during slab creation, otherwise reuse
@@ -341,7 +341,7 @@ static inline bool ____kasan_slab_free(struct kmem_cache *cache, void *object,
if (is_kfence_address(object))
return false;
- if (unlikely(nearest_obj(cache, virt_to_head_page(object), object) !=
+ if (unlikely(nearest_obj(cache, virt_to_slab(object), object) !=
object)) {
kasan_report_invalid_free(tagged_object, ip);
return true;
diff --git a/mm/kasan/generic.c b/mm/kasan/generic.c
index 84a038b07c6f..5d0b79416c4e 100644
--- a/mm/kasan/generic.c
+++ b/mm/kasan/generic.c
@@ -339,7 +339,7 @@ static void __kasan_record_aux_stack(void *addr, bool can_alloc)
return;
cache = page->slab_cache;
- object = nearest_obj(cache, page, addr);
+ object = nearest_obj(cache, page_slab(page), addr);
alloc_meta = kasan_get_alloc_meta(cache, object);
if (!alloc_meta)
return;
diff --git a/mm/kasan/report.c b/mm/kasan/report.c
index 0bc10f452f7e..e00999dc6499 100644
--- a/mm/kasan/report.c
+++ b/mm/kasan/report.c
@@ -249,7 +249,7 @@ static void print_address_description(void *addr, u8 tag)
if (page && PageSlab(page)) {
struct kmem_cache *cache = page->slab_cache;
- void *object = nearest_obj(cache, page, addr);
+ void *object = nearest_obj(cache, page_slab(page), addr);
describe_object(cache, object, addr, tag);
}
diff --git a/mm/kasan/report_tags.c b/mm/kasan/report_tags.c
index 8a319fc16dab..06c21dd77493 100644
--- a/mm/kasan/report_tags.c
+++ b/mm/kasan/report_tags.c
@@ -23,7 +23,7 @@ const char *kasan_get_bug_type(struct kasan_access_info *info)
page = kasan_addr_to_page(addr);
if (page && PageSlab(page)) {
cache = page->slab_cache;
- object = nearest_obj(cache, page, (void *)addr);
+ object = nearest_obj(cache, page_slab(page), (void *)addr);
alloc_meta = kasan_get_alloc_meta(cache, object);
if (alloc_meta) {
diff --git a/mm/kfence/kfence_test.c b/mm/kfence/kfence_test.c
index 695030c1fff8..f7276711d7b9 100644
--- a/mm/kfence/kfence_test.c
+++ b/mm/kfence/kfence_test.c
@@ -291,8 +291,8 @@ static void *test_alloc(struct kunit *test, size_t size, gfp_t gfp, enum allocat
* even for KFENCE objects; these are required so that
* memcg accounting works correctly.
*/
- KUNIT_EXPECT_EQ(test, obj_to_index(s, page, alloc), 0U);
- KUNIT_EXPECT_EQ(test, objs_per_slab_page(s, page), 1);
+ KUNIT_EXPECT_EQ(test, obj_to_index(s, page_slab(page), alloc), 0U);
+ KUNIT_EXPECT_EQ(test, objs_per_slab(s, page_slab(page)), 1);
if (policy == ALLOCATE_ANY)
return alloc;
diff --git a/mm/memcontrol.c b/mm/memcontrol.c
index 6863a834ed42..906edbd92436 100644
--- a/mm/memcontrol.c
+++ b/mm/memcontrol.c
@@ -2819,7 +2819,7 @@ static struct mem_cgroup *get_mem_cgroup_from_objcg(struct obj_cgroup *objcg)
int memcg_alloc_page_obj_cgroups(struct page *page, struct kmem_cache *s,
gfp_t gfp, bool new_page)
{
- unsigned int objects = objs_per_slab_page(s, page);
+ unsigned int objects = objs_per_slab(s, page_slab(page));
unsigned long memcg_data;
void *vec;
@@ -2881,7 +2881,7 @@ struct mem_cgroup *mem_cgroup_from_obj(void *p)
struct obj_cgroup *objcg;
unsigned int off;
- off = obj_to_index(page->slab_cache, page, p);
+ off = obj_to_index(page->slab_cache, page_slab(page), p);
objcg = page_objcgs(page)[off];
if (objcg)
return obj_cgroup_memcg(objcg);
diff --git a/mm/slab.c b/mm/slab.c
index f0447b087d02..785fffd527fe 100644
--- a/mm/slab.c
+++ b/mm/slab.c
@@ -1560,7 +1560,7 @@ static void check_poison_obj(struct kmem_cache *cachep, void *objp)
struct slab *slab = virt_to_slab(objp);
unsigned int objnr;
- objnr = obj_to_index(cachep, slab_page(slab), objp);
+ objnr = obj_to_index(cachep, slab, objp);
if (objnr) {
objp = index_to_obj(cachep, slab, objnr - 1);
realobj = (char *)objp + obj_offset(cachep);
@@ -2530,7 +2530,7 @@ static void *slab_get_obj(struct kmem_cache *cachep, struct slab *slab)
static void slab_put_obj(struct kmem_cache *cachep,
struct slab *slab, void *objp)
{
- unsigned int objnr = obj_to_index(cachep, slab_page(slab), objp);
+ unsigned int objnr = obj_to_index(cachep, slab, objp);
#if DEBUG
unsigned int i;
@@ -2717,7 +2717,7 @@ static void *cache_free_debugcheck(struct kmem_cache *cachep, void *objp,
if (cachep->flags & SLAB_STORE_USER)
*dbg_userword(cachep, objp) = (void *)caller;
- objnr = obj_to_index(cachep, slab_page(slab), objp);
+ objnr = obj_to_index(cachep, slab, objp);
BUG_ON(objnr >= cachep->num);
BUG_ON(objp != index_to_obj(cachep, slab, objnr));
@@ -3663,7 +3663,7 @@ void kmem_obj_info(struct kmem_obj_info *kpp, void *object, struct slab *slab)
objp = object - obj_offset(cachep);
kpp->kp_data_offset = obj_offset(cachep);
slab = virt_to_slab(objp);
- objnr = obj_to_index(cachep, slab_page(slab), objp);
+ objnr = obj_to_index(cachep, slab, objp);
objp = index_to_obj(cachep, slab, objnr);
kpp->kp_objp = objp;
if (DEBUG && cachep->flags & SLAB_STORE_USER)
@@ -4181,7 +4181,7 @@ void __check_heap_object(const void *ptr, unsigned long n,
/* Find and validate object. */
cachep = slab->slab_cache;
- objnr = obj_to_index(cachep, slab_page(slab), (void *)ptr);
+ objnr = obj_to_index(cachep, slab, (void *)ptr);
BUG_ON(objnr >= cachep->num);
/* Find offset within object. */
diff --git a/mm/slab.h b/mm/slab.h
index 7376c9d8aa2b..15d109d8ec89 100644
--- a/mm/slab.h
+++ b/mm/slab.h
@@ -483,7 +483,7 @@ static inline void memcg_slab_post_alloc_hook(struct kmem_cache *s,
continue;
}
- off = obj_to_index(s, page, p[i]);
+ off = obj_to_index(s, page_slab(page), p[i]);
obj_cgroup_get(objcg);
page_objcgs(page)[off] = objcg;
mod_objcg_state(objcg, page_pgdat(page),
@@ -522,7 +522,7 @@ static inline void memcg_slab_free_hook(struct kmem_cache *s_orig,
else
s = s_orig;
- off = obj_to_index(s, page, p[i]);
+ off = obj_to_index(s, page_slab(page), p[i]);
objcg = objcgs[off];
if (!objcg)
continue;
diff --git a/mm/slub.c b/mm/slub.c
index f5344211d8cc..61aaaa662c5e 100644
--- a/mm/slub.c
+++ b/mm/slub.c
@@ -4342,7 +4342,7 @@ void kmem_obj_info(struct kmem_obj_info *kpp, void *object, struct slab *slab)
#else
objp = objp0;
#endif
- objnr = obj_to_index(s, slab_page(slab), objp);
+ objnr = obj_to_index(s, slab, objp);
kpp->kp_data_offset = (unsigned long)((char *)objp0 - (char *)objp);
objp = base + s->size * objnr;
kpp->kp_objp = objp;
--
2.33.1
next prev parent reply other threads:[~2021-12-01 18:15 UTC|newest]
Thread overview: 87+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-12-01 18:14 [PATCH v2 00/33] Separate struct slab from struct page Vlastimil Babka
2021-12-01 18:14 ` [PATCH v2 01/33] mm: add virt_to_folio() and folio_address() Vlastimil Babka
2021-12-14 14:20 ` Johannes Weiner
2021-12-14 14:27 ` Vlastimil Babka
2021-12-01 18:14 ` [PATCH v2 02/33] mm/slab: Dissolve slab_map_pages() in its caller Vlastimil Babka
2021-12-01 18:14 ` [PATCH v2 03/33] mm/slub: Make object_err() static Vlastimil Babka
2021-12-01 18:14 ` [PATCH v2 04/33] mm: Split slab into its own type Vlastimil Babka
2021-12-14 14:24 ` Johannes Weiner
2021-12-01 18:14 ` [PATCH v2 05/33] mm: Add account_slab() and unaccount_slab() Vlastimil Babka
2021-12-14 14:25 ` Johannes Weiner
2021-12-01 18:14 ` [PATCH v2 06/33] mm: Convert virt_to_cache() to use struct slab Vlastimil Babka
2021-12-14 14:26 ` Johannes Weiner
2021-12-01 18:14 ` [PATCH v2 07/33] mm: Convert __ksize() to " Vlastimil Babka
2021-12-14 14:28 ` Johannes Weiner
2021-12-01 18:14 ` [PATCH v2 08/33] mm: Use struct slab in kmem_obj_info() Vlastimil Babka
2021-12-01 18:14 ` [PATCH v2 09/33] mm: Convert check_heap_object() to use struct slab Vlastimil Babka
2021-12-01 18:14 ` [PATCH v2 10/33] mm/slub: Convert detached_freelist to use a " Vlastimil Babka
2021-12-01 18:14 ` [PATCH v2 11/33] mm/slub: Convert kfree() " Vlastimil Babka
2021-12-01 18:14 ` [PATCH v2 12/33] mm/slub: Convert __slab_lock() and __slab_unlock() to " Vlastimil Babka
2021-12-01 18:14 ` [PATCH v2 13/33] mm/slub: Convert print_page_info() to print_slab_info() Vlastimil Babka
2021-12-01 18:14 ` [PATCH v2 14/33] mm/slub: Convert alloc_slab_page() to return a struct slab Vlastimil Babka
2021-12-01 18:14 ` [PATCH v2 15/33] mm/slub: Convert __free_slab() to use " Vlastimil Babka
2021-12-01 18:14 ` [PATCH v2 16/33] mm/slub: Convert pfmemalloc_match() to take a " Vlastimil Babka
2021-12-01 18:14 ` [PATCH v2 17/33] mm/slub: Convert most struct page to struct slab by spatch Vlastimil Babka
2021-12-01 18:14 ` [PATCH v2 18/33] mm/slub: Finish struct page to struct slab conversion Vlastimil Babka
2021-12-01 18:14 ` [PATCH v2 19/33] mm/slab: Convert kmem_getpages() and kmem_freepages() to struct slab Vlastimil Babka
2021-12-01 18:14 ` [PATCH v2 20/33] mm/slab: Convert most struct page to struct slab by spatch Vlastimil Babka
2021-12-01 18:14 ` [PATCH v2 21/33] mm/slab: Finish struct page to struct slab conversion Vlastimil Babka
2021-12-01 18:14 ` Vlastimil Babka [this message]
2021-12-02 17:16 ` [PATCH v2 22/33] mm: Convert struct page to struct slab in functions used by other subsystems Andrey Konovalov
2021-12-14 14:31 ` Johannes Weiner
2021-12-01 18:15 ` [PATCH v2 23/33] mm/memcg: Convert slab objcgs from struct page to struct slab Vlastimil Babka
2021-12-14 14:43 ` Johannes Weiner
2021-12-20 23:31 ` Vlastimil Babka
2021-12-01 18:15 ` [PATCH v2 24/33] mm/slob: Convert SLOB to use " Vlastimil Babka
2021-12-10 10:44 ` Hyeonggon Yoo
2021-12-10 11:44 ` Vlastimil Babka
2021-12-10 15:29 ` Hyeonggon Yoo
2021-12-10 18:09 ` Vlastimil Babka
2021-12-11 10:54 ` Hyeonggon Yoo
2021-12-01 18:15 ` [PATCH v2 25/33] mm/kasan: Convert to struct folio and " Vlastimil Babka
2021-12-02 17:16 ` Andrey Konovalov
2021-12-01 18:15 ` [PATCH v2 26/33] mm/kfence: Convert kfence_guarded_alloc() to " Vlastimil Babka
2021-12-01 18:15 ` [PATCH v2 27/33] zsmalloc: Stop using slab fields in struct page Vlastimil Babka
2021-12-01 23:34 ` Minchan Kim
2021-12-14 14:58 ` Johannes Weiner
2021-12-01 18:15 ` [PATCH v2 28/33] bootmem: Use page->index instead of page->freelist Vlastimil Babka
2021-12-14 14:59 ` Johannes Weiner
2021-12-01 18:15 ` [PATCH v2 29/33] iommu: Use put_pages_list Vlastimil Babka
2021-12-01 19:07 ` Matthew Wilcox
2021-12-01 19:45 ` Robin Murphy
2021-12-01 18:15 ` [PATCH v2 30/33] mm: Remove slab from struct page Vlastimil Babka
2021-12-14 14:46 ` Johannes Weiner
2021-12-01 18:15 ` [PATCH v2 31/33] mm/sl*b: Differentiate struct slab fields by sl*b implementations Vlastimil Babka
2021-12-10 16:37 ` Hyeonggon Yoo
2021-12-10 18:26 ` Vlastimil Babka
2021-12-11 11:55 ` Hyeonggon Yoo
2021-12-11 16:52 ` Matthew Wilcox
2021-12-12 5:54 ` Hyeonggon Yoo
2021-12-11 16:23 ` Matthew Wilcox
2021-12-12 6:00 ` Hyeonggon Yoo
2021-12-12 6:52 ` [PATCH] mm/slob: Remove unnecessary page_mapcount_reset() function call Hyeonggon Yoo
2021-12-14 11:51 ` Vlastimil Babka
2021-12-01 18:15 ` [PATCH v2 32/33] mm/slub: Simplify struct slab slabs field definition Vlastimil Babka
2021-12-14 15:06 ` Johannes Weiner
2021-12-01 18:15 ` [PATCH v2 33/33] mm/slub: Define struct slab fields for CONFIG_SLUB_CPU_PARTIAL only when enabled Vlastimil Babka
2021-12-02 12:25 ` [PATCH v2 00/33] Separate struct slab from struct page Vlastimil Babka
2021-12-14 12:57 ` Vlastimil Babka
2021-12-14 14:38 ` Hyeonggon Yoo
2021-12-14 14:43 ` Vlastimil Babka
2021-12-15 3:47 ` Hyeonggon Yoo
2021-12-15 1:03 ` Roman Gushchin
2021-12-15 23:38 ` Roman Gushchin
2021-12-16 9:19 ` Vlastimil Babka
2021-12-20 0:47 ` Vlastimil Babka
2021-12-20 1:42 ` Matthew Wilcox
2021-12-20 0:24 ` Vlastimil Babka
2021-12-16 15:00 ` Hyeonggon Yoo
2021-12-20 23:58 ` Vlastimil Babka
2021-12-21 17:25 ` Robin Murphy
2021-12-22 7:36 ` Hyeonggon Yoo
2021-12-22 16:56 ` Vlastimil Babka
2021-12-25 9:16 ` Hyeonggon Yoo
2021-12-25 17:53 ` Matthew Wilcox
2021-12-27 2:43 ` Hyeonggon Yoo
2021-12-29 11:22 ` Hyeonggon Yoo
2022-01-03 17:56 ` Vlastimil Babka
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