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ipv{4,6}/udp{,lite}: simplify proc registration

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Remove a couple indirections to make the code look like most other
protocols.

Signed-off-by: Christoph Hellwig <hch@lst.de>
This commit is contained in:
Christoph Hellwig
2018-04-10 21:31:50 +02:00
parent 3f3942aca6
commit a3d2599b24
5 changed files with 78 additions and 113 deletions
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99
net/ipv4/udp.c
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@@ -2582,12 +2582,13 @@ EXPORT_SYMBOL(udp_prot);
static struct sock *udp_get_first(struct seq_file *seq, int start)
{
struct sock *sk;
struct udp_seq_afinfo *afinfo = PDE_DATA(file_inode(seq->file));
struct udp_iter_state *state = seq->private;
struct net *net = seq_file_net(seq);
for (state->bucket = start; state->bucket <= state->udp_table->mask;
for (state->bucket = start; state->bucket <= afinfo->udp_table->mask;
++state->bucket) {
struct udp_hslot *hslot = &state->udp_table->hash[state->bucket];
struct udp_hslot *hslot = &afinfo->udp_table->hash[state->bucket];
if (hlist_empty(&hslot->head))
continue;
@@ -2596,7 +2597,7 @@ static struct sock *udp_get_first(struct seq_file *seq, int start)
sk_for_each(sk, &hslot->head) {
if (!net_eq(sock_net(sk), net))
continue;
if (sk->sk_family == state->family)
if (sk->sk_family == afinfo->family)
goto found;
}
spin_unlock_bh(&hslot->lock);
@@ -2608,16 +2609,17 @@ found:
static struct sock *udp_get_next(struct seq_file *seq, struct sock *sk)
{
struct udp_seq_afinfo *afinfo = PDE_DATA(file_inode(seq->file));
struct udp_iter_state *state = seq->private;
struct net *net = seq_file_net(seq);
do {
sk = sk_next(sk);
} while (sk && (!net_eq(sock_net(sk), net) || sk->sk_family != state->family));
} while (sk && (!net_eq(sock_net(sk), net) || sk->sk_family != afinfo->family));
if (!sk) {
if (state->bucket <= state->udp_table->mask)
spin_unlock_bh(&state->udp_table->hash[state->bucket].lock);
if (state->bucket <= afinfo->udp_table->mask)
spin_unlock_bh(&afinfo->udp_table->hash[state->bucket].lock);
return udp_get_first(seq, state->bucket + 1);
}
return sk;
@@ -2633,15 +2635,16 @@ static struct sock *udp_get_idx(struct seq_file *seq, loff_t pos)
return pos ? NULL : sk;
}
static void *udp_seq_start(struct seq_file *seq, loff_t *pos)
void *udp_seq_start(struct seq_file *seq, loff_t *pos)
{
struct udp_iter_state *state = seq->private;
state->bucket = MAX_UDP_PORTS;
return *pos ? udp_get_idx(seq, *pos-1) : SEQ_START_TOKEN;
}
EXPORT_SYMBOL(udp_seq_start);
static void *udp_seq_next(struct seq_file *seq, void *v, loff_t *pos)
void *udp_seq_next(struct seq_file *seq, void *v, loff_t *pos)
{
struct sock *sk;
@@ -2653,56 +2656,17 @@ static void *udp_seq_next(struct seq_file *seq, void *v, loff_t *pos)
++*pos;
return sk;
}
EXPORT_SYMBOL(udp_seq_next);
static void udp_seq_stop(struct seq_file *seq, void *v)
void udp_seq_stop(struct seq_file *seq, void *v)
{
struct udp_seq_afinfo *afinfo = PDE_DATA(file_inode(seq->file));
struct udp_iter_state *state = seq->private;
if (state->bucket <= state->udp_table->mask)
spin_unlock_bh(&state->udp_table->hash[state->bucket].lock);
if (state->bucket <= afinfo->udp_table->mask)
spin_unlock_bh(&afinfo->udp_table->hash[state->bucket].lock);
}
int udp_seq_open(struct inode *inode, struct file *file)
{
struct udp_seq_afinfo *afinfo = PDE_DATA(inode);
struct udp_iter_state *s;
int err;
err = seq_open_net(inode, file, &afinfo->seq_ops,
sizeof(struct udp_iter_state));
if (err < 0)
return err;
s = ((struct seq_file *)file->private_data)->private;
s->family = afinfo->family;
s->udp_table = afinfo->udp_table;
return err;
}
EXPORT_SYMBOL(udp_seq_open);
/* ------------------------------------------------------------------------ */
int udp_proc_register(struct net *net, struct udp_seq_afinfo *afinfo)
{
struct proc_dir_entry *p;
int rc = 0;
afinfo->seq_ops.start = udp_seq_start;
afinfo->seq_ops.next = udp_seq_next;
afinfo->seq_ops.stop = udp_seq_stop;
p = proc_create_data(afinfo->name, 0444, net->proc_net,
afinfo->seq_fops, afinfo);
if (!p)
rc = -ENOMEM;
return rc;
}
EXPORT_SYMBOL(udp_proc_register);
void udp_proc_unregister(struct net *net, struct udp_seq_afinfo *afinfo)
{
remove_proc_entry(afinfo->name, net->proc_net);
}
EXPORT_SYMBOL(udp_proc_unregister);
EXPORT_SYMBOL(udp_seq_stop);
/* ------------------------------------------------------------------------ */
static void udp4_format_sock(struct sock *sp, struct seq_file *f,
@@ -2742,32 +2706,43 @@ int udp4_seq_show(struct seq_file *seq, void *v)
return 0;
}
static const struct file_operations udp_afinfo_seq_fops = {
static const struct seq_operations udp_seq_ops = {
.start = udp_seq_start,
.next = udp_seq_next,
.stop = udp_seq_stop,
.show = udp4_seq_show,
};
static int udp_seq_open(struct inode *inode, struct file *file)
{
return seq_open_net(inode, file, &udp_seq_ops,
sizeof(struct udp_iter_state));
}
const struct file_operations udp_afinfo_seq_fops = {
.open = udp_seq_open,
.read = seq_read,
.llseek = seq_lseek,
.release = seq_release_net
};
EXPORT_SYMBOL(udp_afinfo_seq_fops);
/* ------------------------------------------------------------------------ */
static struct udp_seq_afinfo udp4_seq_afinfo = {
.name = "udp",
.family = AF_INET,
.udp_table = &udp_table,
.seq_fops = &udp_afinfo_seq_fops,
.seq_ops = {
.show = udp4_seq_show,
},
};
static int __net_init udp4_proc_init_net(struct net *net)
{
return udp_proc_register(net, &udp4_seq_afinfo);
if (!proc_create_data("udp", 0444, net->proc_net, &udp_afinfo_seq_fops,
&udp4_seq_afinfo))
return -ENOMEM;
return 0;
}
static void __net_exit udp4_proc_exit_net(struct net *net)
{
udp_proc_unregister(net, &udp4_seq_afinfo);
remove_proc_entry("udp", net->proc_net);
}
static struct pernet_operations udp4_net_ops = {