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Date: Fri, 24 Jul 2020 13:14:11 -0700
From: Tom Herbert <tom@...bertland.com>
To: netdev@...r.kernel.org, amritha.nambiar@...el.com
Cc: Tom Herbert <tom@...bertland.com>
Subject: [RFC PATCH net-next 2/3] sock: Use dev_and_queue structure for TX queue mapping in sock
Replace sk_tx_queue_mapping with sk_tx_dev_and_queue_mapping and
change associated function to set, get, and clear mapping.
---
drivers/net/hyperv/netvsc_drv.c | 9 +++++---
include/net/request_sock.h | 2 +-
include/net/sock.h | 38 +++++++++++++++++----------------
net/core/dev.c | 8 ++++---
net/core/sock.c | 8 +++----
5 files changed, 36 insertions(+), 29 deletions(-)
diff --git a/drivers/net/hyperv/netvsc_drv.c b/drivers/net/hyperv/netvsc_drv.c
index e0327b88732c..016b1ab20767 100644
--- a/drivers/net/hyperv/netvsc_drv.c
+++ b/drivers/net/hyperv/netvsc_drv.c
@@ -307,7 +307,7 @@ static inline int netvsc_get_tx_queue(struct net_device *ndev,
/* If queue index changed record the new value */
if (q_idx != old_idx &&
sk && sk_fullsock(sk) && rcu_access_pointer(sk->sk_dst_cache))
- sk_tx_queue_set(sk, q_idx);
+ sk_tx_dev_and_queue_set(sk, ndev, q_idx);
return q_idx;
}
@@ -325,9 +325,12 @@ static inline int netvsc_get_tx_queue(struct net_device *ndev,
*/
static u16 netvsc_pick_tx(struct net_device *ndev, struct sk_buff *skb)
{
- int q_idx = sk_tx_queue_get(skb->sk);
+ int ifindex, q_idx;
- if (q_idx < 0 || skb->ooo_okay || q_idx >= ndev->real_num_tx_queues) {
+ sk_tx_dev_and_queue_get(skb->sk, &ifindex, &q_idx);
+
+ if (ifindex != ndev->ifindex || q_idx < 0 || skb->ooo_okay ||
+ q_idx >= ndev->real_num_tx_queues) {
/* If forwarding a packet, we use the recorded queue when
* available for better cache locality.
*/
diff --git a/include/net/request_sock.h b/include/net/request_sock.h
index cf8b33213bbc..a6c0636eeb58 100644
--- a/include/net/request_sock.h
+++ b/include/net/request_sock.h
@@ -95,7 +95,7 @@ reqsk_alloc(const struct request_sock_ops *ops, struct sock *sk_listener,
req->rsk_ops = ops;
req_to_sk(req)->sk_prot = sk_listener->sk_prot;
sk_node_init(&req_to_sk(req)->sk_node);
- sk_tx_queue_clear(req_to_sk(req));
+ sk_tx_dev_and_queue_clear(req_to_sk(req));
req->saved_syn = NULL;
req->num_timeout = 0;
req->num_retrans = 0;
diff --git a/include/net/sock.h b/include/net/sock.h
index b4919e603648..f311425513ff 100644
--- a/include/net/sock.h
+++ b/include/net/sock.h
@@ -149,7 +149,7 @@ typedef __u64 __bitwise __addrpair;
* @skc_cookie: socket's cookie value
* @skc_node: main hash linkage for various protocol lookup tables
* @skc_nulls_node: main hash linkage for TCP/UDP/UDP-Lite protocol
- * @skc_tx_queue_mapping: tx queue number for this connection
+ * @skc_tx_dev_and_queue_mapping: tx ifindex/queue for this connection
* @skc_rx_queue_mapping: rx queue number for this connection
* @skc_flags: place holder for sk_flags
* %SO_LINGER (l_onoff), %SO_BROADCAST, %SO_KEEPALIVE,
@@ -234,7 +234,7 @@ struct sock_common {
struct hlist_node skc_node;
struct hlist_nulls_node skc_nulls_node;
};
- unsigned short skc_tx_queue_mapping;
+ struct dev_and_queue skc_tx_dev_and_queue_mapping;
#ifdef CONFIG_XPS
unsigned short skc_rx_queue_mapping;
#endif
@@ -362,7 +362,7 @@ struct sock {
#define sk_node __sk_common.skc_node
#define sk_nulls_node __sk_common.skc_nulls_node
#define sk_refcnt __sk_common.skc_refcnt
-#define sk_tx_queue_mapping __sk_common.skc_tx_queue_mapping
+#define sk_tx_dev_and_queue_mapping __sk_common.skc_tx_dev_and_queue_mapping
#ifdef CONFIG_XPS
#define sk_rx_queue_mapping __sk_common.skc_rx_queue_mapping
#endif
@@ -1842,25 +1842,27 @@ static inline void __dev_and_queue_clear(struct dev_and_queue *odandq)
odandq->val64 = dandq.val64;
}
-static inline void sk_tx_queue_set(struct sock *sk, int tx_queue)
+static inline void sk_tx_dev_and_queue_set(struct sock *sk,
+ struct net_device *dev, int tx_queue)
{
- /* sk_tx_queue_mapping accept only upto a 16-bit value */
- if (WARN_ON_ONCE((unsigned short)tx_queue >= USHRT_MAX))
- return;
- sk->sk_tx_queue_mapping = tx_queue;
+ __dev_and_queue_set(&sk->sk_tx_dev_and_queue_mapping, dev, tx_queue);
}
-static inline void sk_tx_queue_clear(struct sock *sk)
+static inline void sk_tx_dev_and_queue_clear(struct sock *sk)
{
- sk->sk_tx_queue_mapping = NO_QUEUE_MAPPING;
+ __dev_and_queue_clear(&sk->sk_tx_dev_and_queue_mapping);
}
-static inline int sk_tx_queue_get(const struct sock *sk)
+static inline void sk_tx_dev_and_queue_get(const struct sock *sk, int *ifindex,
+ int *tx_queue)
{
- if (sk && sk->sk_tx_queue_mapping != NO_QUEUE_MAPPING)
- return sk->sk_tx_queue_mapping;
-
- return -1;
+ if (sk) {
+ __dev_and_queue_get(&sk->sk_tx_dev_and_queue_mapping,
+ ifindex, tx_queue);
+ } else {
+ *ifindex = -1;
+ *tx_queue = -1;
+ }
}
static inline void sk_rx_queue_set(struct sock *sk, const struct sk_buff *skb)
@@ -1989,7 +1991,7 @@ static inline void dst_negative_advice(struct sock *sk)
if (ndst != dst) {
rcu_assign_pointer(sk->sk_dst_cache, ndst);
- sk_tx_queue_clear(sk);
+ sk_tx_dev_and_queue_clear(sk);
sk->sk_dst_pending_confirm = 0;
}
}
@@ -2000,7 +2002,7 @@ __sk_dst_set(struct sock *sk, struct dst_entry *dst)
{
struct dst_entry *old_dst;
- sk_tx_queue_clear(sk);
+ sk_tx_dev_and_queue_clear(sk);
sk->sk_dst_pending_confirm = 0;
old_dst = rcu_dereference_protected(sk->sk_dst_cache,
lockdep_sock_is_held(sk));
@@ -2013,7 +2015,7 @@ sk_dst_set(struct sock *sk, struct dst_entry *dst)
{
struct dst_entry *old_dst;
- sk_tx_queue_clear(sk);
+ sk_tx_dev_and_queue_clear(sk);
sk->sk_dst_pending_confirm = 0;
old_dst = xchg((__force struct dst_entry **)&sk->sk_dst_cache, dst);
dst_release(old_dst);
diff --git a/net/core/dev.c b/net/core/dev.c
index a986b07ea845..669dea31b467 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -3982,11 +3982,13 @@ u16 netdev_pick_tx(struct net_device *dev, struct sk_buff *skb,
struct net_device *sb_dev)
{
struct sock *sk = skb->sk;
- int queue_index = sk_tx_queue_get(sk);
+ int queue_index, ifindex;
+
+ sk_tx_dev_and_queue_get(sk, &ifindex, &queue_index);
sb_dev = sb_dev ? : dev;
- if (queue_index < 0 || skb->ooo_okay ||
+ if (ifindex != dev->ifindex || queue_index < 0 || skb->ooo_okay ||
queue_index >= dev->real_num_tx_queues) {
int new_index = get_xps_queue(dev, sb_dev, skb);
@@ -3996,7 +3998,7 @@ u16 netdev_pick_tx(struct net_device *dev, struct sk_buff *skb,
if (queue_index != new_index && sk &&
sk_fullsock(sk) &&
rcu_access_pointer(sk->sk_dst_cache))
- sk_tx_queue_set(sk, new_index);
+ sk_tx_dev_and_queue_set(sk, dev, new_index);
queue_index = new_index;
}
diff --git a/net/core/sock.c b/net/core/sock.c
index 6da54eac2b34..92129b017074 100644
--- a/net/core/sock.c
+++ b/net/core/sock.c
@@ -542,7 +542,7 @@ struct dst_entry *__sk_dst_check(struct sock *sk, u32 cookie)
struct dst_entry *dst = __sk_dst_get(sk);
if (dst && dst->obsolete && dst->ops->check(dst, cookie) == NULL) {
- sk_tx_queue_clear(sk);
+ sk_tx_dev_and_queue_clear(sk);
sk->sk_dst_pending_confirm = 0;
RCU_INIT_POINTER(sk->sk_dst_cache, NULL);
dst_release(dst);
@@ -1680,7 +1680,7 @@ static struct sock *sk_prot_alloc(struct proto *prot, gfp_t priority,
if (!try_module_get(prot->owner))
goto out_free_sec;
- sk_tx_queue_clear(sk);
+ sk_tx_dev_and_queue_clear(sk);
}
return sk;
@@ -1749,7 +1749,7 @@ struct sock *sk_alloc(struct net *net, int family, gfp_t priority,
cgroup_sk_alloc(&sk->sk_cgrp_data);
sock_update_classid(&sk->sk_cgrp_data);
sock_update_netprioidx(&sk->sk_cgrp_data);
- sk_tx_queue_clear(sk);
+ sk_tx_dev_and_queue_clear(sk);
}
return sk;
@@ -1973,7 +1973,7 @@ struct sock *sk_clone_lock(const struct sock *sk, const gfp_t priority)
*/
sk_refcnt_debug_inc(newsk);
sk_set_socket(newsk, NULL);
- sk_tx_queue_clear(newsk);
+ sk_tx_dev_and_queue_clear(newsk);
RCU_INIT_POINTER(newsk->sk_wq, NULL);
if (newsk->sk_prot->sockets_allocated)
--
2.25.1
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