netdev - [PATCH bpf-next v2 5/5] xsk: simplify xdp_clear_umem_at

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <1538398297-14862-6-git-send-email-magnus.karlsson@intel.com>
Date:   Mon,  1 Oct 2018 14:51:37 +0200
From:   Magnus Karlsson <magnus.karlsson@...el.com>
To:     magnus.karlsson@...el.com, bjorn.topel@...el.com, ast@...nel.org,
        daniel@...earbox.net, netdev@...r.kernel.org,
        jakub.kicinski@...ronome.com
Subject: [PATCH bpf-next v2 5/5] xsk: simplify xdp_clear_umem_at_qid implementation

As we now do not allow ethtool to deactivate the queue id we are
running an AF_XDP socket on, we can simplify the implementation of
xdp_clear_umem_at_qid().

Signed-off-by: Magnus Karlsson <magnus.karlsson@...el.com>
---
 net/xdp/xdp_umem.c | 7 ++-----
 1 file changed, 2 insertions(+), 5 deletions(-)

diff --git a/net/xdp/xdp_umem.c b/net/xdp/xdp_umem.c
index 773326f..c6007c5 100644
--- a/net/xdp/xdp_umem.c
+++ b/net/xdp/xdp_umem.c
@@ -68,12 +68,9 @@ struct xdp_umem *xdp_get_umem_from_qid(struct net_device *dev,
 
 static void xdp_clear_umem_at_qid(struct net_device *dev, u16 queue_id)
 {
-	/* Zero out the entry independent on how many queues are configured
-	 * at this point in time, as it might be used in the future.
-	 */
-	if (queue_id < dev->num_rx_queues)
+	if (queue_id < dev->real_num_rx_queues)
 		dev->_rx[queue_id].umem = NULL;
-	if (queue_id < dev->num_tx_queues)
+	if (queue_id < dev->real_num_tx_queues)
 		dev->_tx[queue_id].umem = NULL;
 }
 
-- 
2.7.4