From: Aditi Ghag <aditi.ghag@isovalent.com>
To: bpf@vger.kernel.org
Cc: kafai@fb.com, sdf@google.com, aditi.ghag@isovalent.com,
Martin KaFai Lau <martin.lau@kernel.org>
Subject: [PATCH v7 bpf-next 04/10] udp: seq_file: Remove bpf_seq_afinfo from udp_iter_state
Date: Wed, 3 May 2023 22:53:45 +0000 [thread overview]
Message-ID: <20230503225351.3700208-5-aditi.ghag@isovalent.com> (raw)
In-Reply-To: <20230503225351.3700208-1-aditi.ghag@isovalent.com>
This is a preparatory commit to remove the field. The field was
previously shared between proc fs and BPF UDP socket iterators. As the
follow-up commits will decouple the implementation for the iterators,
remove the field. As for BPF socket iterator, filtering of sockets is
exepected to be done in BPF programs.
Suggested-by: Martin KaFai Lau <martin.lau@kernel.org>
Signed-off-by: Aditi Ghag <aditi.ghag@isovalent.com>
---
include/net/udp.h | 1 -
net/ipv4/udp.c | 25 +++++--------------------
2 files changed, 5 insertions(+), 21 deletions(-)
diff --git a/include/net/udp.h b/include/net/udp.h
index de4b528522bb..5cad44318d71 100644
--- a/include/net/udp.h
+++ b/include/net/udp.h
@@ -437,7 +437,6 @@ struct udp_seq_afinfo {
struct udp_iter_state {
struct seq_net_private p;
int bucket;
- struct udp_seq_afinfo *bpf_seq_afinfo;
};
void *udp_seq_start(struct seq_file *seq, loff_t *pos);
diff --git a/net/ipv4/udp.c b/net/ipv4/udp.c
index c426ebafeb13..9f8c1554a9e4 100644
--- a/net/ipv4/udp.c
+++ b/net/ipv4/udp.c
@@ -2993,14 +2993,16 @@ static bool seq_sk_match(struct seq_file *seq, const struct sock *sk)
net_eq(sock_net(sk), seq_file_net(seq)));
}
+static const struct seq_operations bpf_iter_udp_seq_ops;
static struct udp_table *udp_get_table_seq(struct seq_file *seq,
struct net *net)
{
- const struct udp_iter_state *state = seq->private;
const struct udp_seq_afinfo *afinfo;
- if (state->bpf_seq_afinfo)
+#ifdef CONFIG_BPF_SYSCALL
+ if (seq->op == &bpf_iter_udp_seq_ops)
return net->ipv4.udp_table;
+#endif
afinfo = pde_data(file_inode(seq->file));
return afinfo->udp_table ? : net->ipv4.udp_table;
@@ -3424,28 +3426,11 @@ DEFINE_BPF_ITER_FUNC(udp, struct bpf_iter_meta *meta,
static int bpf_iter_init_udp(void *priv_data, struct bpf_iter_aux_info *aux)
{
- struct udp_iter_state *st = priv_data;
- struct udp_seq_afinfo *afinfo;
- int ret;
-
- afinfo = kmalloc(sizeof(*afinfo), GFP_USER | __GFP_NOWARN);
- if (!afinfo)
- return -ENOMEM;
-
- afinfo->family = AF_UNSPEC;
- afinfo->udp_table = NULL;
- st->bpf_seq_afinfo = afinfo;
- ret = bpf_iter_init_seq_net(priv_data, aux);
- if (ret)
- kfree(afinfo);
- return ret;
+ return bpf_iter_init_seq_net(priv_data, aux);
}
static void bpf_iter_fini_udp(void *priv_data)
{
- struct udp_iter_state *st = priv_data;
-
- kfree(st->bpf_seq_afinfo);
bpf_iter_fini_seq_net(priv_data);
}
--
2.34.1
next prev parent reply other threads:[~2023-05-03 22:54 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-05-03 22:53 [PATCH v7 bpf-next 00/10] bpf: Add socket destroy capability Aditi Ghag
2023-05-03 22:53 ` [PATCH v7 bpf-next 01/10] bpf: tcp: Avoid taking fast sock lock in iterator Aditi Ghag
2023-05-03 22:53 ` [PATCH v7 bpf-next 02/10] udp: seq_file: Helper function to match socket attributes Aditi Ghag
2023-05-03 22:53 ` [PATCH v7 bpf-next 03/10] bpf: udp: Encapsulate logic to get udp table Aditi Ghag
2023-05-03 22:53 ` Aditi Ghag [this message]
2023-05-04 1:25 ` [PATCH v7 bpf-next 04/10] udp: seq_file: Remove bpf_seq_afinfo from udp_iter_state Aditi Ghag
2023-05-03 22:53 ` [PATCH v7 bpf-next 05/10] bpf: udp: Implement batching for sockets iterator Aditi Ghag
2023-05-03 22:53 ` [PATCH v7 bpf-next 06/10] bpf: Add bpf_sock_destroy kfunc Aditi Ghag
2023-05-05 0:13 ` Martin KaFai Lau
2023-05-05 18:49 ` Martin KaFai Lau
2023-05-05 20:05 ` Alexei Starovoitov
2023-05-03 22:53 ` [PATCH v7 bpf-next 07/10] selftests/bpf: Add helper to get port using getsockname Aditi Ghag
2023-05-04 17:33 ` Stanislav Fomichev
2023-05-03 22:53 ` [PATCH v7 bpf-next 08/10] selftests/bpf: Test bpf_sock_destroy Aditi Ghag
2023-05-05 0:24 ` Martin KaFai Lau
2023-05-03 22:53 ` [PATCH v7 bpf-next 09/10] bpf: Add a kfunc filter function to 'struct btf_kfunc_id_set' Aditi Ghag
2023-05-05 0:28 ` Martin KaFai Lau
2023-05-03 22:53 ` [PATCH v7 bpf-next 10/10] selftests/bpf: Extend bpf_sock_destroy tests Aditi Ghag
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