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proc: introduce proc_create_net_single

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Variant of proc_create_data that directly take a seq_file show
callback and deals with network namespaces in ->open and ->release.
All callers of proc_create + single_open_net converted over, and
single_{open,release}_net are removed entirely.

Signed-off-by: Christoph Hellwig <hch@lst.de>
This commit is contained in:
Christoph Hellwig
2018-04-13 20:38:35 +02:00
parent c350637227
commit 3617d9496c
13 changed files with 86 additions and 307 deletions
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15
net/ipv6/route.c
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@@ -4876,18 +4876,6 @@ static int rt6_stats_seq_show(struct seq_file *seq, void *v)
return 0;
}
static int rt6_stats_seq_open(struct inode *inode, struct file *file)
{
return single_open_net(inode, file, rt6_stats_seq_show);
}
static const struct file_operations rt6_stats_seq_fops = {
.open = rt6_stats_seq_open,
.read = seq_read,
.llseek = seq_lseek,
.release = single_release_net,
};
#endif /* CONFIG_PROC_FS */
#ifdef CONFIG_SYSCTL
@@ -5094,7 +5082,8 @@ static int __net_init ip6_route_net_init_late(struct net *net)
#ifdef CONFIG_PROC_FS
proc_create_net("ipv6_route", 0, net->proc_net, &ipv6_route_seq_ops,
sizeof(struct ipv6_route_iter));
proc_create("rt6_stats", 0444, net->proc_net, &rt6_stats_seq_fops);
proc_create_net_single("rt6_stats", 0444, net->proc_net,
rt6_stats_seq_show, NULL);
#endif
return 0;
}