[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Message-Id: <20200820135729.135783-3-lmb@cloudflare.com>
Date: Thu, 20 Aug 2020 14:57:25 +0100
From: Lorenz Bauer <lmb@...udflare.com>
To: jakub@...udflare.com, john.fastabend@...il.com,
Daniel Borkmann <daniel@...earbox.net>,
Lorenz Bauer <lmb@...udflare.com>,
"David S. Miller" <davem@...emloft.net>,
Jakub Kicinski <kuba@...nel.org>,
Alexei Starovoitov <ast@...nel.org>
Cc: kernel-team@...udflare.com, netdev@...r.kernel.org,
bpf@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH bpf-next v2 2/6] bpf: sockmap: merge sockmap and sockhash update functions
Merge the two very similar functions sock_map_update_elem and
sock_hash_update_elem into one.
Signed-off-by: Lorenz Bauer <lmb@...udflare.com>
---
net/core/sock_map.c | 49 +++++++--------------------------------------
1 file changed, 7 insertions(+), 42 deletions(-)
diff --git a/net/core/sock_map.c b/net/core/sock_map.c
index abe4bac40db9..905e2dd765aa 100644
--- a/net/core/sock_map.c
+++ b/net/core/sock_map.c
@@ -559,10 +559,12 @@ static bool sock_map_sk_state_allowed(const struct sock *sk)
return false;
}
+static int sock_hash_update_common(struct bpf_map *map, void *key,
+ struct sock *sk, u64 flags);
+
static int sock_map_update_elem(struct bpf_map *map, void *key,
void *value, u64 flags)
{
- u32 idx = *(u32 *)key;
struct socket *sock;
struct sock *sk;
int ret;
@@ -591,8 +593,10 @@ static int sock_map_update_elem(struct bpf_map *map, void *key,
sock_map_sk_acquire(sk);
if (!sock_map_sk_state_allowed(sk))
ret = -EOPNOTSUPP;
+ else if (map->map_type == BPF_MAP_TYPE_SOCKMAP)
+ ret = sock_map_update_common(map, *(u32 *)key, sk, flags);
else
- ret = sock_map_update_common(map, idx, sk, flags);
+ ret = sock_hash_update_common(map, key, sk, flags);
sock_map_sk_release(sk);
out:
fput(sock->file);
@@ -909,45 +913,6 @@ static int sock_hash_update_common(struct bpf_map *map, void *key,
return ret;
}
-static int sock_hash_update_elem(struct bpf_map *map, void *key,
- void *value, u64 flags)
-{
- struct socket *sock;
- struct sock *sk;
- int ret;
- u64 ufd;
-
- if (map->value_size == sizeof(u64))
- ufd = *(u64 *)value;
- else
- ufd = *(u32 *)value;
- if (ufd > S32_MAX)
- return -EINVAL;
-
- sock = sockfd_lookup(ufd, &ret);
- if (!sock)
- return ret;
- sk = sock->sk;
- if (!sk) {
- ret = -EINVAL;
- goto out;
- }
- if (!sock_map_sk_is_suitable(sk)) {
- ret = -EOPNOTSUPP;
- goto out;
- }
-
- sock_map_sk_acquire(sk);
- if (!sock_map_sk_state_allowed(sk))
- ret = -EOPNOTSUPP;
- else
- ret = sock_hash_update_common(map, key, sk, flags);
- sock_map_sk_release(sk);
-out:
- fput(sock->file);
- return ret;
-}
-
static int sock_hash_get_next_key(struct bpf_map *map, void *key,
void *key_next)
{
@@ -1216,7 +1181,7 @@ const struct bpf_map_ops sock_hash_ops = {
.map_alloc = sock_hash_alloc,
.map_free = sock_hash_free,
.map_get_next_key = sock_hash_get_next_key,
- .map_update_elem = sock_hash_update_elem,
+ .map_update_elem = sock_map_update_elem,
.map_delete_elem = sock_hash_delete_elem,
.map_lookup_elem = sock_hash_lookup,
.map_lookup_elem_sys_only = sock_hash_lookup_sys,
--
2.25.1
Powered by blists - more mailing lists