From 071106ecf68c401173c58808b1cf5f68cc50d390 Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Fri, 05 Jan 2024 08:39:27 +0000
Subject: [PATCH] change wifi driver to cypress
---
kernel/include/net/sock.h | 54 ++++++++++++++++++++++++++++++++++++++++++++----------
1 files changed, 44 insertions(+), 10 deletions(-)
diff --git a/kernel/include/net/sock.h b/kernel/include/net/sock.h
index c604052..22cd0a0 100644
--- a/kernel/include/net/sock.h
+++ b/kernel/include/net/sock.h
@@ -317,7 +317,7 @@
* @sk_tskey: counter to disambiguate concurrent tstamp requests
* @sk_zckey: counter to order MSG_ZEROCOPY notifications
* @sk_socket: Identd and reporting IO signals
- * @sk_user_data: RPC layer private data
+ * @sk_user_data: RPC layer private data. Write-protected by @sk_callback_lock.
* @sk_frag: cached page frag
* @sk_peek_off: current peek_offset value
* @sk_send_head: front of stuff to transmit
@@ -1092,8 +1092,12 @@
* OR an additional socket flag
* [1] : sk_state and sk_prot are in the same cache line.
*/
- if (sk->sk_state == TCP_ESTABLISHED)
- sock_rps_record_flow_hash(sk->sk_rxhash);
+ if (sk->sk_state == TCP_ESTABLISHED) {
+ /* This READ_ONCE() is paired with the WRITE_ONCE()
+ * from sock_rps_save_rxhash() and sock_rps_reset_rxhash().
+ */
+ sock_rps_record_flow_hash(READ_ONCE(sk->sk_rxhash));
+ }
}
#endif
}
@@ -1102,15 +1106,19 @@
const struct sk_buff *skb)
{
#ifdef CONFIG_RPS
- if (unlikely(sk->sk_rxhash != skb->hash))
- sk->sk_rxhash = skb->hash;
+ /* The following WRITE_ONCE() is paired with the READ_ONCE()
+ * here, and another one in sock_rps_record_flow().
+ */
+ if (unlikely(READ_ONCE(sk->sk_rxhash) != skb->hash))
+ WRITE_ONCE(sk->sk_rxhash, skb->hash);
#endif
}
static inline void sock_rps_reset_rxhash(struct sock *sk)
{
#ifdef CONFIG_RPS
- sk->sk_rxhash = 0;
+ /* Paired with READ_ONCE() in sock_rps_record_flow() */
+ WRITE_ONCE(sk->sk_rxhash, 0);
#endif
}
@@ -1240,6 +1248,7 @@
/*
* Pressure flag: try to collapse.
* Technical note: it is used by multiple contexts non atomically.
+ * Make sure to use READ_ONCE()/WRITE_ONCE() for all reads/writes.
* All the __sk_mem_schedule() is of this nature: accounting
* is strict, actions are advisory and have some latency.
*/
@@ -1353,6 +1362,12 @@
return sk->sk_prot->memory_pressure != NULL;
}
+static inline bool sk_under_global_memory_pressure(const struct sock *sk)
+{
+ return sk->sk_prot->memory_pressure &&
+ !!READ_ONCE(*sk->sk_prot->memory_pressure);
+}
+
static inline bool sk_under_memory_pressure(const struct sock *sk)
{
if (!sk->sk_prot->memory_pressure)
@@ -1362,7 +1377,7 @@
mem_cgroup_under_socket_pressure(sk->sk_memcg))
return true;
- return !!*sk->sk_prot->memory_pressure;
+ return !!READ_ONCE(*sk->sk_prot->memory_pressure);
}
static inline long
@@ -1416,7 +1431,7 @@
{
if (!prot->memory_pressure)
return false;
- return !!*prot->memory_pressure;
+ return !!READ_ONCE(*prot->memory_pressure);
}
@@ -1796,7 +1811,12 @@
* Default socket callbacks and setup code
*/
-/* Initialise core socket variables */
+/* Initialise core socket variables using an explicit uid. */
+void sock_init_data_uid(struct socket *sock, struct sock *sk, kuid_t uid);
+
+/* Initialise core socket variables.
+ * Assumes struct socket *sock is embedded in a struct socket_alloc.
+ */
void sock_init_data(struct socket *sock, struct sock *sk);
/*
@@ -1936,6 +1956,7 @@
}
kuid_t sock_i_uid(struct sock *sk);
+unsigned long __sock_i_ino(struct sock *sk);
unsigned long sock_i_ino(struct sock *sk);
static inline kuid_t sock_net_uid(const struct net *net, const struct sock *sk)
@@ -2264,6 +2285,19 @@
return false;
}
+static inline struct sk_buff *skb_clone_and_charge_r(struct sk_buff *skb, struct sock *sk)
+{
+ skb = skb_clone(skb, sk_gfp_mask(sk, GFP_ATOMIC));
+ if (skb) {
+ if (sk_rmem_schedule(sk, skb, skb->truesize)) {
+ skb_set_owner_r(skb, sk);
+ return skb;
+ }
+ __kfree_skb(skb);
+ }
+ return NULL;
+}
+
void sk_reset_timer(struct sock *sk, struct timer_list *timer,
unsigned long expires);
@@ -2538,7 +2572,7 @@
__sock_recv_ts_and_drops(msg, sk, skb);
else if (unlikely(sock_flag(sk, SOCK_TIMESTAMP)))
sock_write_timestamp(sk, skb->tstamp);
- else if (unlikely(sk->sk_stamp == SK_DEFAULT_STAMP))
+ else if (unlikely(sock_read_timestamp(sk) == SK_DEFAULT_STAMP))
sock_write_timestamp(sk, 0);
}
--
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