From: Jakub Sitnicki <jakub@cloudflare.com>
To: bpf@vger.kernel.org
Cc: netdev@vger.kernel.org, kernel-team@cloudflare.com,
Martin KaFai Lau <kafai@fb.com>
Subject: [PATCH bpf-next v5 08/12] bpf, sockmap: Let all kernel-land lookup values in SOCKMAP
Date: Mon, 27 Jan 2020 13:55:30 +0100 [thread overview]
Message-ID: <20200127125534.137492-9-jakub@cloudflare.com> (raw)
In-Reply-To: <20200127125534.137492-1-jakub@cloudflare.com>
Don't require the kernel code, like BPF helpers, that needs access to
SOCKMAP map contents to live in net/core/sock_map.c. Expose the SOCKMAP
lookup operation to all kernel-land.
Lookup from BPF context is not whitelisted yet. While syscalls have a
dedicated lookup handler.
Acked-by: Martin KaFai Lau <kafai@fb.com>
Signed-off-by: Jakub Sitnicki <jakub@cloudflare.com>
---
net/core/sock_map.c | 9 +++++++--
1 file changed, 7 insertions(+), 2 deletions(-)
diff --git a/net/core/sock_map.c b/net/core/sock_map.c
index 71d0a21e6db1..2cbde385e1a0 100644
--- a/net/core/sock_map.c
+++ b/net/core/sock_map.c
@@ -300,7 +300,7 @@ static struct sock *__sock_map_lookup_elem(struct bpf_map *map, u32 key)
static void *sock_map_lookup(struct bpf_map *map, void *key)
{
- return ERR_PTR(-EOPNOTSUPP);
+ return __sock_map_lookup_elem(map, *(u32 *)key);
}
static void *sock_map_lookup_sys(struct bpf_map *map, void *key)
@@ -969,6 +969,11 @@ static void sock_hash_free(struct bpf_map *map)
kfree(htab);
}
+static void *sock_hash_lookup(struct bpf_map *map, void *key)
+{
+ return ERR_PTR(-EOPNOTSUPP);
+}
+
static void sock_hash_release_progs(struct bpf_map *map)
{
psock_progs_drop(&container_of(map, struct bpf_htab, map)->progs);
@@ -1048,7 +1053,7 @@ const struct bpf_map_ops sock_hash_ops = {
.map_get_next_key = sock_hash_get_next_key,
.map_update_elem = sock_hash_update_elem,
.map_delete_elem = sock_hash_delete_elem,
- .map_lookup_elem = sock_map_lookup,
+ .map_lookup_elem = sock_hash_lookup,
.map_release_uref = sock_hash_release_progs,
.map_check_btf = map_check_no_btf,
};
--
2.24.1
next prev parent reply other threads:[~2020-01-27 12:56 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-01-27 12:55 [PATCH bpf-next v5 00/12] Extend SOCKMAP to store listening sockets Jakub Sitnicki
2020-01-27 12:55 ` [PATCH bpf-next v5 01/12] bpf, sk_msg: Don't clear saved sock proto on restore Jakub Sitnicki
2020-01-27 12:55 ` [PATCH bpf-next v5 02/12] net, sk_msg: Annotate lockless access to sk_prot on clone Jakub Sitnicki
2020-01-27 12:55 ` [PATCH bpf-next v5 03/12] net, sk_msg: Clear sk_user_data pointer on clone if tagged Jakub Sitnicki
2020-01-27 12:55 ` [PATCH bpf-next v5 04/12] tcp_bpf: Don't let child socket inherit parent protocol ops on copy Jakub Sitnicki
2020-01-27 12:55 ` [PATCH bpf-next v5 05/12] bpf, sockmap: Allow inserting listening TCP sockets into sockmap Jakub Sitnicki
2020-01-27 12:55 ` [PATCH bpf-next v5 06/12] bpf, sockmap: Don't set up sockmap progs for listening sockets Jakub Sitnicki
2020-01-27 12:55 ` [PATCH bpf-next v5 07/12] bpf, sockmap: Return socket cookie on lookup from syscall Jakub Sitnicki
2020-01-27 12:55 ` Jakub Sitnicki [this message]
2020-01-27 12:55 ` [PATCH bpf-next v5 09/12] bpf: Allow selecting reuseport socket from a SOCKMAP Jakub Sitnicki
2020-01-27 12:55 ` [PATCH bpf-next v5 10/12] net: Generate reuseport group ID on group creation Jakub Sitnicki
2020-01-27 12:55 ` [PATCH bpf-next v5 11/12] selftests/bpf: Extend SK_REUSEPORT tests to cover SOCKMAP Jakub Sitnicki
2020-01-27 12:55 ` [PATCH bpf-next v5 12/12] selftests/bpf: Tests for SOCKMAP holding listening sockets Jakub Sitnicki
2020-03-11 18:48 ` Andrii Nakryiko
2020-03-11 19:49 ` Jakub Sitnicki
2020-03-11 21:02 ` Andrii Nakryiko
2020-03-12 17:25 ` Jakub Sitnicki
2020-01-27 13:01 ` [PATCH bpf-next v5 00/12] Extend SOCKMAP to store " Jakub Sitnicki
2020-01-27 13:05 ` Jakub Sitnicki
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