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authorJohn Fastabend <john.fastabend@gmail.com>2020-01-11 06:12:01 +0000
committerDaniel Borkmann <daniel@iogearbox.net>2020-01-15 23:26:13 +0100
commit33bfe20dd7117dd81fd896a53f743a233e1ad64f (patch)
tree441203009c7ea09d634127efe18c3f029335230b /include/net/tcp.h
parentbpf: Sockmap, ensure sock lock held during tear down (diff)
downloadlinux-dev-33bfe20dd7117dd81fd896a53f743a233e1ad64f.tar.xz
linux-dev-33bfe20dd7117dd81fd896a53f743a233e1ad64f.zip
bpf: Sockmap/tls, push write_space updates through ulp updates
When sockmap sock with TLS enabled is removed we cleanup bpf/psock state and call tcp_update_ulp() to push updates to TLS ULP on top. However, we don't push the write_space callback up and instead simply overwrite the op with the psock stored previous op. This may or may not be correct so to ensure we don't overwrite the TLS write space hook pass this field to the ULP and have it fixup the ctx. This completes a previous fix that pushed the ops through to the ULP but at the time missed doing this for write_space, presumably because write_space TLS hook was added around the same time. Fixes: 95fa145479fbc ("bpf: sockmap/tls, close can race with map free") Signed-off-by: John Fastabend <john.fastabend@gmail.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Reviewed-by: Jakub Sitnicki <jakub@cloudflare.com> Acked-by: Jonathan Lemon <jonathan.lemon@gmail.com> Cc: stable@vger.kernel.org Link: https://lore.kernel.org/bpf/20200111061206.8028-4-john.fastabend@gmail.com
Diffstat (limited to '')
-rw-r--r--include/net/tcp.h6
1 files changed, 4 insertions, 2 deletions
diff --git a/include/net/tcp.h b/include/net/tcp.h
index e460ea7f767b..e6f48384dc71 100644
--- a/include/net/tcp.h
+++ b/include/net/tcp.h
@@ -2147,7 +2147,8 @@ struct tcp_ulp_ops {
/* initialize ulp */
int (*init)(struct sock *sk);
/* update ulp */
- void (*update)(struct sock *sk, struct proto *p);
+ void (*update)(struct sock *sk, struct proto *p,
+ void (*write_space)(struct sock *sk));
/* cleanup ulp */
void (*release)(struct sock *sk);
/* diagnostic */
@@ -2162,7 +2163,8 @@ void tcp_unregister_ulp(struct tcp_ulp_ops *type);
int tcp_set_ulp(struct sock *sk, const char *name);
void tcp_get_available_ulp(char *buf, size_t len);
void tcp_cleanup_ulp(struct sock *sk);
-void tcp_update_ulp(struct sock *sk, struct proto *p);
+void tcp_update_ulp(struct sock *sk, struct proto *p,
+ void (*write_space)(struct sock *sk));
#define MODULE_ALIAS_TCP_ULP(name) \
__MODULE_INFO(alias, alias_userspace, name); \