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Revert "gtp: Use for_each_netdev_rcu() in gtp_genl_dump_pdp()."

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This reverts commit c91e694619 which is
commit 46841c7053e6d25fb33e0534ef023833bf03e382 upstream.

It breaks the Android kernel abi and can be brought back in the future
in an abi-safe way if it is really needed.

Bug: 161946584
Change-Id: I1b6ed883c57437964fcfbcb2479ecf19f6a167f7
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
This commit is contained in:
Greg Kroah-Hartman
2025-02-06 11:35:39 +00:00
parent f3dfa82675
commit da69d6681f
1 changed files with 8 additions and 11 deletions
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19
drivers/net/gtp.c
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@@ -1095,7 +1095,7 @@ static int gtp_newlink(struct net *src_net, struct net_device *dev,
}
gn = net_generic(dev_net(dev), gtp_net_id);
list_add(&gtp->list, &gn->gtp_dev_list);
list_add_rcu(&gtp->list, &gn->gtp_dev_list);
dev->priv_destructor = gtp_destructor;
netdev_dbg(dev, "registered new GTP interface\n");
@@ -1121,7 +1121,7 @@ static void gtp_dellink(struct net_device *dev, struct list_head *head)
hlist_for_each_entry_safe(pctx, next, &gtp->tid_hash[i], hlist_tid)
pdp_context_delete(pctx);
list_del(&gtp->list);
list_del_rcu(&gtp->list);
unregister_netdevice_queue(dev, head);
}
@@ -1689,19 +1689,16 @@ static int gtp_genl_dump_pdp(struct sk_buff *skb,
struct gtp_dev *last_gtp = (struct gtp_dev *)cb->args[2], *gtp;
int i, j, bucket = cb->args[0], skip = cb->args[1];
struct net *net = sock_net(skb->sk);
struct net_device *dev;
struct pdp_ctx *pctx;
struct gtp_net *gn;
gn = net_generic(net, gtp_net_id);
if (cb->args[4])
return 0;
rcu_read_lock();
for_each_netdev_rcu(net, dev) {
if (dev->rtnl_link_ops != &gtp_link_ops)
continue;
gtp = netdev_priv(dev);
list_for_each_entry_rcu(gtp, &gn->gtp_dev_list, list) {
if (last_gtp && last_gtp != gtp)
continue;
else
@@ -1893,9 +1890,9 @@ static void __net_exit gtp_net_exit_batch_rtnl(struct list_head *net_list,
list_for_each_entry(net, net_list, exit_list) {
struct gtp_net *gn = net_generic(net, gtp_net_id);
struct gtp_dev *gtp, *gtp_next;
struct gtp_dev *gtp;
list_for_each_entry_safe(gtp, gtp_next, &gn->gtp_dev_list, list)
list_for_each_entry(gtp, &gn->gtp_dev_list, list)
gtp_dellink(gtp->dev, dev_to_kill);
}
}