Message-Id: <20220729152316.58205-5-laoar.shao@gmail.com>
Date:   Fri, 29 Jul 2022 15:23:05 +0000
From:   Yafang Shao <laoar.shao@...il.com>
To:     ast@...nel.org, daniel@...earbox.net, andrii@...nel.org,
        kafai@...com, songliubraving@...com, yhs@...com,
        john.fastabend@...il.com, kpsingh@...nel.org, sdf@...gle.com,
        haoluo@...gle.com, jolsa@...nel.org, hannes@...xchg.org,
        mhocko@...nel.org, roman.gushchin@...ux.dev, shakeelb@...gle.com,
        songmuchun@...edance.com, akpm@...ux-foundation.org
Cc:     netdev@...r.kernel.org, bpf@...r.kernel.org, linux-mm@...ck.org,
        Yafang Shao <laoar.shao@...il.com>
Subject: [RFC PATCH bpf-next 04/15] bpf: Use bpf_map_area_alloc consistently on bpf map creation

Let's use the generic helper bpf_map_area_alloc() instead of the
open-coded kzalloc helpers in bpf maps creation path.

Signed-off-by: Yafang Shao <laoar.shao@...il.com>
---
 kernel/bpf/bpf_local_storage.c |  6 +++---
 kernel/bpf/cpumap.c            |  6 +++---
 kernel/bpf/devmap.c            |  6 +++---
 kernel/bpf/hashtab.c           |  6 +++---
 kernel/bpf/local_storage.c     |  5 ++---
 kernel/bpf/lpm_trie.c          |  4 ++--
 kernel/bpf/ringbuf.c           |  6 +++---
 net/core/sock_map.c            | 12 ++++++------
 8 files changed, 25 insertions(+), 26 deletions(-)

diff --git a/kernel/bpf/bpf_local_storage.c b/kernel/bpf/bpf_local_storage.c
index 8ce40fd869f6..4ee2e7286c23 100644
--- a/kernel/bpf/bpf_local_storage.c
+++ b/kernel/bpf/bpf_local_storage.c
@@ -582,7 +582,7 @@ void bpf_local_storage_map_free(struct bpf_local_storage_map *smap,
 	synchronize_rcu();
 
 	kvfree(smap->buckets);
-	kfree(smap);
+	bpf_map_area_free(smap);
 }
 
 int bpf_local_storage_map_alloc_check(union bpf_attr *attr)
@@ -610,7 +610,7 @@ struct bpf_local_storage_map *bpf_local_storage_map_alloc(union bpf_attr *attr)
 	unsigned int i;
 	u32 nbuckets;
 
-	smap = kzalloc(sizeof(*smap), GFP_USER | __GFP_NOWARN | __GFP_ACCOUNT);
+	smap = bpf_map_area_alloc(sizeof(*smap), NUMA_NO_NODE);
 	if (!smap)
 		return ERR_PTR(-ENOMEM);
 	bpf_map_init_from_attr(&smap->map, attr);
@@ -623,7 +623,7 @@ struct bpf_local_storage_map *bpf_local_storage_map_alloc(union bpf_attr *attr)
 	smap->buckets = kvcalloc(sizeof(*smap->buckets), nbuckets,
 				 GFP_USER | __GFP_NOWARN | __GFP_ACCOUNT);
 	if (!smap->buckets) {
-		kfree(smap);
+		bpf_map_area_free(smap);
 		return ERR_PTR(-ENOMEM);
 	}
 
diff --git a/kernel/bpf/cpumap.c b/kernel/bpf/cpumap.c
index b25ca9d603a6..b5ba34ddd4b6 100644
--- a/kernel/bpf/cpumap.c
+++ b/kernel/bpf/cpumap.c
@@ -97,7 +97,7 @@ static struct bpf_map *cpu_map_alloc(union bpf_attr *attr)
 	    attr->map_flags & ~BPF_F_NUMA_NODE)
 		return ERR_PTR(-EINVAL);
 
-	cmap = kzalloc(sizeof(*cmap), GFP_USER | __GFP_NOWARN |  __GFP_ACCOUNT);
+	cmap = bpf_map_area_alloc(sizeof(*cmap), NUMA_NO_NODE);
 	if (!cmap)
 		return ERR_PTR(-ENOMEM);
 
@@ -118,7 +118,7 @@ static struct bpf_map *cpu_map_alloc(union bpf_attr *attr)
 
 	return &cmap->map;
 free_cmap:
-	kfree(cmap);
+	bpf_map_area_free(cmap);
 	return ERR_PTR(err);
 }
 
@@ -623,7 +623,7 @@ static void cpu_map_free(struct bpf_map *map)
 		__cpu_map_entry_replace(cmap, i, NULL); /* call_rcu */
 	}
 	bpf_map_area_free(cmap->cpu_map);
-	kfree(cmap);
+	bpf_map_area_free(cmap);
 }
 
 /* Elements are kept alive by RCU; either by rcu_read_lock() (from syscall) or
diff --git a/kernel/bpf/devmap.c b/kernel/bpf/devmap.c
index 88feaa094de8..f9a87dcc5535 100644
--- a/kernel/bpf/devmap.c
+++ b/kernel/bpf/devmap.c
@@ -163,13 +163,13 @@ static struct bpf_map *dev_map_alloc(union bpf_attr *attr)
 	if (!capable(CAP_NET_ADMIN))
 		return ERR_PTR(-EPERM);
 
-	dtab = kzalloc(sizeof(*dtab), GFP_USER | __GFP_NOWARN | __GFP_ACCOUNT);
+	dtab = bpf_map_area_alloc(sizeof(*dtab), NUMA_NO_NODE);
 	if (!dtab)
 		return ERR_PTR(-ENOMEM);
 
 	err = dev_map_init_map(dtab, attr);
 	if (err) {
-		kfree(dtab);
+		bpf_map_area_free(dtab);
 		return ERR_PTR(err);
 	}
 
@@ -240,7 +240,7 @@ static void dev_map_free(struct bpf_map *map)
 		bpf_map_area_free(dtab->netdev_map);
 	}
 
-	kfree(dtab);
+	bpf_map_area_free(dtab);
 }
 
 static int dev_map_get_next_key(struct bpf_map *map, void *key, void *next_key)
diff --git a/kernel/bpf/hashtab.c b/kernel/bpf/hashtab.c
index f1e5303fe26e..8392f7f8a8ac 100644
--- a/kernel/bpf/hashtab.c
+++ b/kernel/bpf/hashtab.c
@@ -495,7 +495,7 @@ static struct bpf_map *htab_map_alloc(union bpf_attr *attr)
 	struct bpf_htab *htab;
 	int err, i;
 
-	htab = kzalloc(sizeof(*htab), GFP_USER | __GFP_NOWARN | __GFP_ACCOUNT);
+	htab = bpf_map_area_alloc(sizeof(*htab), NUMA_NO_NODE);
 	if (!htab)
 		return ERR_PTR(-ENOMEM);
 
@@ -579,7 +579,7 @@ static struct bpf_map *htab_map_alloc(union bpf_attr *attr)
 	bpf_map_area_free(htab->buckets);
 free_htab:
 	lockdep_unregister_key(&htab->lockdep_key);
-	kfree(htab);
+	bpf_map_area_free(htab);
 	return ERR_PTR(err);
 }
 
@@ -1496,7 +1496,7 @@ static void htab_map_free(struct bpf_map *map)
 	for (i = 0; i < HASHTAB_MAP_LOCK_COUNT; i++)
 		free_percpu(htab->map_locked[i]);
 	lockdep_unregister_key(&htab->lockdep_key);
-	kfree(htab);
+	bpf_map_area_free(htab);
 }
 
 static void htab_map_seq_show_elem(struct bpf_map *map, void *key,
diff --git a/kernel/bpf/local_storage.c b/kernel/bpf/local_storage.c
index a64255e20f87..098cf336fae6 100644
--- a/kernel/bpf/local_storage.c
+++ b/kernel/bpf/local_storage.c
@@ -313,8 +313,7 @@ static struct bpf_map *cgroup_storage_map_alloc(union bpf_attr *attr)
 		/* max_entries is not used and enforced to be 0 */
 		return ERR_PTR(-EINVAL);
 
-	map = kzalloc_node(sizeof(struct bpf_cgroup_storage_map),
-			   GFP_USER | __GFP_NOWARN | __GFP_ACCOUNT, numa_node);
+	map = bpf_map_area_alloc(sizeof(struct bpf_cgroup_storage_map), numa_node);
 	if (!map)
 		return ERR_PTR(-ENOMEM);
 
@@ -346,7 +345,7 @@ static void cgroup_storage_map_free(struct bpf_map *_map)
 	WARN_ON(!RB_EMPTY_ROOT(&map->root));
 	WARN_ON(!list_empty(&map->list));
 
-	kfree(map);
+	bpf_map_area_free(map);
 }
 
 static int cgroup_storage_delete_elem(struct bpf_map *map, void *key)
diff --git a/kernel/bpf/lpm_trie.c b/kernel/bpf/lpm_trie.c
index d789e3b831ad..d833496e9e42 100644
--- a/kernel/bpf/lpm_trie.c
+++ b/kernel/bpf/lpm_trie.c
@@ -558,7 +558,7 @@ static struct bpf_map *trie_alloc(union bpf_attr *attr)
 	    attr->value_size > LPM_VAL_SIZE_MAX)
 		return ERR_PTR(-EINVAL);
 
-	trie = kzalloc(sizeof(*trie), GFP_USER | __GFP_NOWARN | __GFP_ACCOUNT);
+	trie = bpf_map_area_alloc(sizeof(*trie), NUMA_NO_NODE);
 	if (!trie)
 		return ERR_PTR(-ENOMEM);
 
@@ -609,7 +609,7 @@ static void trie_free(struct bpf_map *map)
 	}
 
 out:
-	kfree(trie);
+	bpf_map_area_free(trie);
 }
 
 static int trie_get_next_key(struct bpf_map *map, void *_key, void *_next_key)
diff --git a/kernel/bpf/ringbuf.c b/kernel/bpf/ringbuf.c
index df8062cb258c..b483aea35f41 100644
--- a/kernel/bpf/ringbuf.c
+++ b/kernel/bpf/ringbuf.c
@@ -164,7 +164,7 @@ static struct bpf_map *ringbuf_map_alloc(union bpf_attr *attr)
 		return ERR_PTR(-E2BIG);
 #endif
 
-	rb_map = kzalloc(sizeof(*rb_map), GFP_USER | __GFP_NOWARN | __GFP_ACCOUNT);
+	rb_map = bpf_map_area_alloc(sizeof(*rb_map), NUMA_NO_NODE);
 	if (!rb_map)
 		return ERR_PTR(-ENOMEM);
 
@@ -172,7 +172,7 @@ static struct bpf_map *ringbuf_map_alloc(union bpf_attr *attr)
 
 	rb_map->rb = bpf_ringbuf_alloc(attr->max_entries, rb_map->map.numa_node);
 	if (!rb_map->rb) {
-		kfree(rb_map);
+		bpf_map_area_free(rb_map);
 		return ERR_PTR(-ENOMEM);
 	}
 
@@ -199,7 +199,7 @@ static void ringbuf_map_free(struct bpf_map *map)
 
 	rb_map = container_of(map, struct bpf_ringbuf_map, map);
 	bpf_ringbuf_free(rb_map->rb);
-	kfree(rb_map);
+	bpf_map_area_free(rb_map);
 }
 
 static void *ringbuf_map_lookup_elem(struct bpf_map *map, void *key)
diff --git a/net/core/sock_map.c b/net/core/sock_map.c
index 763d77162d0c..d0c43384d8bf 100644
--- a/net/core/sock_map.c
+++ b/net/core/sock_map.c
@@ -41,7 +41,7 @@ static struct bpf_map *sock_map_alloc(union bpf_attr *attr)
 	    attr->map_flags & ~SOCK_CREATE_FLAG_MASK)
 		return ERR_PTR(-EINVAL);
 
-	stab = kzalloc(sizeof(*stab), GFP_USER | __GFP_NOWARN | __GFP_ACCOUNT);
+	stab = bpf_map_area_alloc(sizeof(*stab), NUMA_NO_NODE);
 	if (!stab)
 		return ERR_PTR(-ENOMEM);
 
@@ -52,7 +52,7 @@ static struct bpf_map *sock_map_alloc(union bpf_attr *attr)
 				       sizeof(struct sock *),
 				       stab->map.numa_node);
 	if (!stab->sks) {
-		kfree(stab);
+		bpf_map_area_free(stab);
 		return ERR_PTR(-ENOMEM);
 	}
 
@@ -361,7 +361,7 @@ static void sock_map_free(struct bpf_map *map)
 	synchronize_rcu();
 
 	bpf_map_area_free(stab->sks);
-	kfree(stab);
+	bpf_map_area_free(stab);
 }
 
 static void sock_map_release_progs(struct bpf_map *map)
@@ -1076,7 +1076,7 @@ static struct bpf_map *sock_hash_alloc(union bpf_attr *attr)
 	if (attr->key_size > MAX_BPF_STACK)
 		return ERR_PTR(-E2BIG);
 
-	htab = kzalloc(sizeof(*htab), GFP_USER | __GFP_NOWARN | __GFP_ACCOUNT);
+	htab = bpf_map_area_alloc(sizeof(*htab), NUMA_NO_NODE);
 	if (!htab)
 		return ERR_PTR(-ENOMEM);
 
@@ -1106,7 +1106,7 @@ static struct bpf_map *sock_hash_alloc(union bpf_attr *attr)
 
 	return &htab->map;
 free_htab:
-	kfree(htab);
+	bpf_map_area_free(htab);
 	return ERR_PTR(err);
 }
 
@@ -1159,7 +1159,7 @@ static void sock_hash_free(struct bpf_map *map)
 	synchronize_rcu();
 
 	bpf_map_area_free(htab->buckets);
-	kfree(htab);
+	bpf_map_area_free(htab);
 }
 
 static void *sock_hash_lookup_sys(struct bpf_map *map, void *key)
-- 
2.17.1

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