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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-05-18 17:35:05 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-05-18 17:39:31 +0000
commit85c675d0d09a45a135bddd15d7b385f8758c32fb (patch)
tree76267dbc9b9a130337be3640948fe397b04ac629 /net/xdp/xsk.c
parentAdding upstream version 6.6.15. (diff)
downloadlinux-85c675d0d09a45a135bddd15d7b385f8758c32fb.tar.xz
linux-85c675d0d09a45a135bddd15d7b385f8758c32fb.zip
Adding upstream version 6.7.7.upstream/6.7.7
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'net/xdp/xsk.c')
-rw-r--r--net/xdp/xsk.c33
1 files changed, 31 insertions, 2 deletions
diff --git a/net/xdp/xsk.c b/net/xdp/xsk.c
index d849dc04a3..da1582de6e 100644
--- a/net/xdp/xsk.c
+++ b/net/xdp/xsk.c
@@ -33,6 +33,7 @@
#include "xsk.h"
#define TX_BATCH_SIZE 32
+#define MAX_PER_SOCKET_BUDGET (TX_BATCH_SIZE)
static DEFINE_PER_CPU(struct list_head, xskmap_flush_list);
@@ -395,6 +396,16 @@ void __xsk_map_flush(void)
}
}
+#ifdef CONFIG_DEBUG_NET
+bool xsk_map_check_flush(void)
+{
+ if (list_empty(this_cpu_ptr(&xskmap_flush_list)))
+ return false;
+ __xsk_map_flush();
+ return true;
+}
+#endif
+
void xsk_tx_completed(struct xsk_buff_pool *pool, u32 nb_entries)
{
xskq_prod_submit_n(pool->cq, nb_entries);
@@ -417,16 +428,25 @@ EXPORT_SYMBOL(xsk_tx_release);
bool xsk_tx_peek_desc(struct xsk_buff_pool *pool, struct xdp_desc *desc)
{
+ bool budget_exhausted = false;
struct xdp_sock *xs;
rcu_read_lock();
+again:
list_for_each_entry_rcu(xs, &pool->xsk_tx_list, tx_list) {
+ if (xs->tx_budget_spent >= MAX_PER_SOCKET_BUDGET) {
+ budget_exhausted = true;
+ continue;
+ }
+
if (!xskq_cons_peek_desc(xs->tx, desc, pool)) {
if (xskq_has_descs(xs->tx))
xskq_cons_release(xs->tx);
continue;
}
+ xs->tx_budget_spent++;
+
/* This is the backpressure mechanism for the Tx path.
* Reserve space in the completion queue and only proceed
* if there is space in it. This avoids having to implement
@@ -440,6 +460,14 @@ bool xsk_tx_peek_desc(struct xsk_buff_pool *pool, struct xdp_desc *desc)
return true;
}
+ if (budget_exhausted) {
+ list_for_each_entry_rcu(xs, &pool->xsk_tx_list, tx_list)
+ xs->tx_budget_spent = 0;
+
+ budget_exhausted = false;
+ goto again;
+ }
+
out:
rcu_read_unlock();
return false;
@@ -683,12 +711,13 @@ static struct sk_buff *xsk_build_skb(struct xdp_sock *xs,
memcpy(vaddr, buffer, len);
kunmap_local(vaddr);
- skb_add_rx_frag(skb, nr_frags, page, 0, len, 0);
+ skb_add_rx_frag(skb, nr_frags, page, 0, len, PAGE_SIZE);
+ refcount_add(PAGE_SIZE, &xs->sk.sk_wmem_alloc);
}
}
skb->dev = dev;
- skb->priority = xs->sk.sk_priority;
+ skb->priority = READ_ONCE(xs->sk.sk_priority);
skb->mark = READ_ONCE(xs->sk.sk_mark);
skb->destructor = xsk_destruct_skb;
xsk_set_destructor_arg(skb);