linux-kernel - [PATCH bpf-next v2 10/35] bpf: memcg-based memory accounting for socket storage maps

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Date:   Mon, 27 Jul 2020 11:44:41 -0700
From:   Roman Gushchin <guro@...com>
To:     <bpf@...r.kernel.org>
CC:     <netdev@...r.kernel.org>, Alexei Starovoitov <ast@...nel.org>,
        Daniel Borkmann <daniel@...earbox.net>, <kernel-team@...com>,
        <linux-kernel@...r.kernel.org>, Roman Gushchin <guro@...com>
Subject: [PATCH bpf-next v2 10/35] bpf: memcg-based memory accounting for socket storage maps

Account memory used by the socket storage.

Signed-off-by: Roman Gushchin <guro@...com>
---
 net/core/bpf_sk_storage.c | 12 +++++++-----
 1 file changed, 7 insertions(+), 5 deletions(-)

diff --git a/net/core/bpf_sk_storage.c b/net/core/bpf_sk_storage.c
index eafcd15e7dfd..fbcd03cd00d3 100644
--- a/net/core/bpf_sk_storage.c
+++ b/net/core/bpf_sk_storage.c
@@ -130,7 +130,8 @@ static struct bpf_sk_storage_elem *selem_alloc(struct bpf_sk_storage_map *smap,
 	if (charge_omem && omem_charge(sk, smap->elem_size))
 		return NULL;
 
-	selem = kzalloc(smap->elem_size, GFP_ATOMIC | __GFP_NOWARN);
+	selem = kzalloc(smap->elem_size,
+			GFP_ATOMIC | __GFP_NOWARN | __GFP_ACCOUNT);
 	if (selem) {
 		if (value)
 			memcpy(SDATA(selem)->data, value, smap->map.value_size);
@@ -337,7 +338,8 @@ static int sk_storage_alloc(struct sock *sk,
 	if (err)
 		return err;
 
-	sk_storage = kzalloc(sizeof(*sk_storage), GFP_ATOMIC | __GFP_NOWARN);
+	sk_storage = kzalloc(sizeof(*sk_storage),
+			     GFP_ATOMIC | __GFP_NOWARN | __GFP_ACCOUNT);
 	if (!sk_storage) {
 		err = -ENOMEM;
 		goto uncharge;
@@ -677,7 +679,7 @@ static struct bpf_map *bpf_sk_storage_map_alloc(union bpf_attr *attr)
 	u64 cost;
 	int ret;
 
-	smap = kzalloc(sizeof(*smap), GFP_USER | __GFP_NOWARN);
+	smap = kzalloc(sizeof(*smap), GFP_USER | __GFP_NOWARN | __GFP_ACCOUNT);
 	if (!smap)
 		return ERR_PTR(-ENOMEM);
 	bpf_map_init_from_attr(&smap->map, attr);
@@ -695,7 +697,7 @@ static struct bpf_map *bpf_sk_storage_map_alloc(union bpf_attr *attr)
 	}
 
 	smap->buckets = kvcalloc(sizeof(*smap->buckets), nbuckets,
-				 GFP_USER | __GFP_NOWARN);
+				 GFP_USER | __GFP_NOWARN | __GFP_ACCOUNT);
 	if (!smap->buckets) {
 		bpf_map_charge_finish(&smap->map.memory);
 		kfree(smap);
@@ -1024,7 +1026,7 @@ bpf_sk_storage_diag_alloc(const struct nlattr *nla_stgs)
 	}
 
 	diag = kzalloc(sizeof(*diag) + sizeof(diag->maps[0]) * nr_maps,
-		       GFP_KERNEL);
+		       GFP_KERNEL | __GFP_ACCOUNT);
 	if (!diag)
 		return ERR_PTR(-ENOMEM);
 
-- 
2.26.2