Introduce new helper bpf_map_kvcalloc() for this memory allocation.
Signed-off-by: Yafang Shao <laoar.shao@xxxxxxxxx>
---
include/linux/bpf.h | 8 ++++++++
kernel/bpf/bpf_local_storage.c | 4 ++--
kernel/bpf/syscall.c | 15 +++++++++++++++
3 files changed, 25 insertions(+), 2 deletions(-)
diff --git a/include/linux/bpf.h b/include/linux/bpf.h
index eca1502..e1e5ada 100644
--- a/include/linux/bpf.h
+++ b/include/linux/bpf.h
@@ -1717,6 +1717,8 @@ int generic_map_delete_batch(struct bpf_map *map,
void *bpf_map_kmalloc_node(const struct bpf_map *map, size_t size, gfp_t flags,
int node);
void *bpf_map_kzalloc(const struct bpf_map *map, size_t size, gfp_t flags);
+void *bpf_map_kvcalloc(struct bpf_map *map, size_t n, size_t size,
+ gfp_t flags);
void __percpu *bpf_map_alloc_percpu(const struct bpf_map *map, size_t size,
size_t align, gfp_t flags);
#else
@@ -1733,6 +1735,12 @@ void __percpu *bpf_map_alloc_percpu(const struct bpf_map *map, size_t size,
return kzalloc(size, flags);
}
+static inline void *
+bpf_map_kvcalloc(struct bpf_map *map, size_t n, size_t size, gfp_t flags)
+{
+ return kvcalloc(n, size, flags);
+}
+
static inline void __percpu *
bpf_map_alloc_percpu(const struct bpf_map *map, size_t size, size_t align,
gfp_t flags)
diff --git a/kernel/bpf/bpf_local_storage.c b/kernel/bpf/bpf_local_storage.c
index 44498d7d..8a24828 100644
--- a/kernel/bpf/bpf_local_storage.c
+++ b/kernel/bpf/bpf_local_storage.c
@@ -620,8 +620,8 @@ struct bpf_local_storage_map *bpf_local_storage_map_alloc(union bpf_attr *attr)
nbuckets = max_t(u32, 2, nbuckets);
smap->bucket_log = ilog2(nbuckets);
- smap->buckets = kvcalloc(sizeof(*smap->buckets), nbuckets,
- GFP_USER | __GFP_NOWARN | __GFP_ACCOUNT);
+ smap->buckets = bpf_map_kvcalloc(&smap->map, sizeof(*smap->buckets),
+ nbuckets, GFP_USER | __GFP_NOWARN);
if (!smap->buckets) {
bpf_map_area_free(smap, &smap->map);
return ERR_PTR(-ENOMEM);
diff --git a/kernel/bpf/syscall.c b/kernel/bpf/syscall.c
index 727c04c..6123c71 100644
--- a/kernel/bpf/syscall.c
+++ b/kernel/bpf/syscall.c
@@ -489,6 +489,21 @@ void *bpf_map_kzalloc(const struct bpf_map *map, size_t size, gfp_t flags)
return ptr;
}
+void *bpf_map_kvcalloc(struct bpf_map *map, size_t n, size_t size,
+ gfp_t flags)
+{
+ struct mem_cgroup *memcg, *old_memcg;
+ void *ptr;
+
+ memcg = bpf_map_get_memcg(map);
+ old_memcg = set_active_memcg(memcg);
+ ptr = kvcalloc(n, size, flags | __GFP_ACCOUNT);
+ set_active_memcg(old_memcg);
+ bpf_map_put_memcg(memcg);
+
+ return ptr;
+}
+
void __percpu *bpf_map_alloc_percpu(const struct bpf_map *map, size_t size,
size_t align, gfp_t flags)
{
--
1.8.3.1
