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appletalk: use remove_proc_subtree to simplify procfs code

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Use remove_proc_subtree to remove the whole subtree
on cleanup.Also do some cleanup.

Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
YueHaibing 2019-03-01 10:57:56 +08:00 committed by David S. Miller
parent 084e5bb16b
commit e2bcd8b0ce
1 changed files with 17 additions and 39 deletions
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56
net/appletalk/atalk_proc.c
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@ -210,56 +210,34 @@ static const struct seq_operations atalk_seq_socket_ops = {
.show = atalk_seq_socket_show,
};
static struct proc_dir_entry *atalk_proc_dir;
int __init atalk_proc_init(void)
{
struct proc_dir_entry *p;
int rc = -ENOMEM;
if (!proc_mkdir("atalk", init_net.proc_net))
return -ENOMEM;
atalk_proc_dir = proc_mkdir("atalk", init_net.proc_net);
if (!atalk_proc_dir)
if (!proc_create_seq("atalk/interface", 0444, init_net.proc_net,
&atalk_seq_interface_ops))
goto out;
p = proc_create_seq("interface", 0444, atalk_proc_dir,
&atalk_seq_interface_ops);
if (!p)
goto out_interface;
if (!proc_create_seq("atalk/route", 0444, init_net.proc_net,
&atalk_seq_route_ops))
goto out;
p = proc_create_seq("route", 0444, atalk_proc_dir,
&atalk_seq_route_ops);
if (!p)
goto out_route;
if (!proc_create_seq("atalk/socket", 0444, init_net.proc_net,
&atalk_seq_socket_ops))
goto out;
p = proc_create_seq("socket", 0444, atalk_proc_dir,
&atalk_seq_socket_ops);
if (!p)
goto out_socket;
if (!proc_create_seq_private("atalk/arp", 0444, init_net.proc_net,
&aarp_seq_ops,
sizeof(struct aarp_iter_state), NULL))
goto out;
p = proc_create_seq_private("arp", 0444, atalk_proc_dir, &aarp_seq_ops,
sizeof(struct aarp_iter_state), NULL);
if (!p)
goto out_arp;
rc = 0;
out:
return rc;
out_arp:
remove_proc_entry("socket", atalk_proc_dir);
out_socket:
remove_proc_entry("route", atalk_proc_dir);
out_route:
remove_proc_entry("interface", atalk_proc_dir);
out_interface:
remove_proc_entry("atalk", init_net.proc_net);
goto out;
remove_proc_subtree("atalk", init_net.proc_net);
return -ENOMEM;
}
void __exit atalk_proc_exit(void)
{
remove_proc_entry("interface", atalk_proc_dir);
remove_proc_entry("route", atalk_proc_dir);
remove_proc_entry("socket", atalk_proc_dir);
remove_proc_entry("arp", atalk_proc_dir);
remove_proc_entry("atalk", init_net.proc_net);
remove_proc_subtree("atalk", init_net.proc_net);
}