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Message-Id: <1480394329-24847-2-git-send-email-dsa@cumulusnetworks.com>
Date: Mon, 28 Nov 2016 20:38:47 -0800
From: David Ahern <dsa@...ulusnetworks.com>
To: netdev@...r.kernel.org
Cc: daniel@...que.org, ast@...com, daniel@...earbox.net,
maheshb@...gle.com, tgraf@...g.ch,
David Ahern <dsa@...ulusnetworks.com>
Subject: [PATCH net-next v4 1/3] bpf: Refactor cgroups code in prep for new type
Code move and rename only; no functional change intended.
Signed-off-by: David Ahern <dsa@...ulusnetworks.com>
---
v4
- dropped refactor of __cgroup_bpf_run_filter and renamed it
to __cgroup_bpf_run_filter_skb
v3
- dropped the rename
v2
- fix bpf_prog_run_clear_cb to bpf_prog_run_save_cb as caught by Daniel
- rename BPF_PROG_TYPE_CGROUP_SKB and its cg_skb functions to
BPF_PROG_TYPE_CGROUP and cgroup
include/linux/bpf-cgroup.h | 46 +++++++++++++++++++++++-----------------------
kernel/bpf/cgroup.c | 10 +++++-----
kernel/bpf/syscall.c | 28 +++++++++++++++-------------
3 files changed, 43 insertions(+), 41 deletions(-)
diff --git a/include/linux/bpf-cgroup.h b/include/linux/bpf-cgroup.h
index ec80d0c0953e..7f0fc635b13e 100644
--- a/include/linux/bpf-cgroup.h
+++ b/include/linux/bpf-cgroup.h
@@ -37,31 +37,31 @@ void cgroup_bpf_update(struct cgroup *cgrp,
struct bpf_prog *prog,
enum bpf_attach_type type);
-int __cgroup_bpf_run_filter(struct sock *sk,
- struct sk_buff *skb,
- enum bpf_attach_type type);
-
-/* Wrappers for __cgroup_bpf_run_filter() guarded by cgroup_bpf_enabled. */
-#define BPF_CGROUP_RUN_PROG_INET_INGRESS(sk,skb) \
-({ \
- int __ret = 0; \
- if (cgroup_bpf_enabled) \
- __ret = __cgroup_bpf_run_filter(sk, skb, \
- BPF_CGROUP_INET_INGRESS); \
- \
- __ret; \
+int __cgroup_bpf_run_filter_skb(struct sock *sk,
+ struct sk_buff *skb,
+ enum bpf_attach_type type);
+
+/* Wrappers for __cgroup_bpf_run_filter_skb() guarded by cgroup_bpf_enabled. */
+#define BPF_CGROUP_RUN_PROG_INET_INGRESS(sk, skb) \
+({ \
+ int __ret = 0; \
+ if (cgroup_bpf_enabled) \
+ __ret = __cgroup_bpf_run_filter_skb(sk, skb, \
+ BPF_CGROUP_INET_INGRESS); \
+ \
+ __ret; \
})
-#define BPF_CGROUP_RUN_PROG_INET_EGRESS(sk,skb) \
-({ \
- int __ret = 0; \
- if (cgroup_bpf_enabled && sk && sk == skb->sk) { \
- typeof(sk) __sk = sk_to_full_sk(sk); \
- if (sk_fullsock(__sk)) \
- __ret = __cgroup_bpf_run_filter(__sk, skb, \
- BPF_CGROUP_INET_EGRESS); \
- } \
- __ret; \
+#define BPF_CGROUP_RUN_PROG_INET_EGRESS(sk, skb) \
+({ \
+ int __ret = 0; \
+ if (cgroup_bpf_enabled && sk && sk == skb->sk) { \
+ typeof(sk) __sk = sk_to_full_sk(sk); \
+ if (sk_fullsock(__sk)) \
+ __ret = __cgroup_bpf_run_filter_skb(__sk, skb, \
+ BPF_CGROUP_INET_EGRESS); \
+ } \
+ __ret; \
})
#else
diff --git a/kernel/bpf/cgroup.c b/kernel/bpf/cgroup.c
index a0ab43f264b0..19892973a78a 100644
--- a/kernel/bpf/cgroup.c
+++ b/kernel/bpf/cgroup.c
@@ -118,7 +118,7 @@ void __cgroup_bpf_update(struct cgroup *cgrp,
}
/**
- * __cgroup_bpf_run_filter() - Run a program for packet filtering
+ * __cgroup_bpf_run_filter_skb() - Run a program for packet filtering
* @sk: The socken sending or receiving traffic
* @skb: The skb that is being sent or received
* @type: The type of program to be exectuted
@@ -132,9 +132,9 @@ void __cgroup_bpf_update(struct cgroup *cgrp,
* This function will return %-EPERM if any if an attached program was found
* and if it returned != 1 during execution. In all other cases, 0 is returned.
*/
-int __cgroup_bpf_run_filter(struct sock *sk,
- struct sk_buff *skb,
- enum bpf_attach_type type)
+int __cgroup_bpf_run_filter_skb(struct sock *sk,
+ struct sk_buff *skb,
+ enum bpf_attach_type type)
{
struct bpf_prog *prog;
struct cgroup *cgrp;
@@ -164,4 +164,4 @@ int __cgroup_bpf_run_filter(struct sock *sk,
return ret;
}
-EXPORT_SYMBOL(__cgroup_bpf_run_filter);
+EXPORT_SYMBOL(__cgroup_bpf_run_filter_skb);
diff --git a/kernel/bpf/syscall.c b/kernel/bpf/syscall.c
index 4caa18e6860a..5518a6839ab1 100644
--- a/kernel/bpf/syscall.c
+++ b/kernel/bpf/syscall.c
@@ -856,6 +856,7 @@ static int bpf_prog_attach(const union bpf_attr *attr)
{
struct bpf_prog *prog;
struct cgroup *cgrp;
+ enum bpf_prog_type ptype;
if (!capable(CAP_NET_ADMIN))
return -EPERM;
@@ -866,25 +867,26 @@ static int bpf_prog_attach(const union bpf_attr *attr)
switch (attr->attach_type) {
case BPF_CGROUP_INET_INGRESS:
case BPF_CGROUP_INET_EGRESS:
- prog = bpf_prog_get_type(attr->attach_bpf_fd,
- BPF_PROG_TYPE_CGROUP_SKB);
- if (IS_ERR(prog))
- return PTR_ERR(prog);
-
- cgrp = cgroup_get_from_fd(attr->target_fd);
- if (IS_ERR(cgrp)) {
- bpf_prog_put(prog);
- return PTR_ERR(cgrp);
- }
-
- cgroup_bpf_update(cgrp, prog, attr->attach_type);
- cgroup_put(cgrp);
+ ptype = BPF_PROG_TYPE_CGROUP_SKB;
break;
default:
return -EINVAL;
}
+ prog = bpf_prog_get_type(attr->attach_bpf_fd, ptype);
+ if (IS_ERR(prog))
+ return PTR_ERR(prog);
+
+ cgrp = cgroup_get_from_fd(attr->target_fd);
+ if (IS_ERR(cgrp)) {
+ bpf_prog_put(prog);
+ return PTR_ERR(cgrp);
+ }
+
+ cgroup_bpf_update(cgrp, prog, attr->attach_type);
+ cgroup_put(cgrp);
+
return 0;
}
--
2.1.4
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