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root/net/appletalk/atalk_proc.c

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DEFINITIONS

This source file includes following definitions.
  1. atalk_get_interface_idx
  2. atalk_seq_interface_start
  3. atalk_seq_interface_next
  4. atalk_seq_interface_stop
  5. atalk_seq_interface_show
  6. atalk_get_route_idx
  7. atalk_seq_route_start
  8. atalk_seq_route_next
  9. atalk_seq_route_stop
  10. atalk_seq_route_show
  11. atalk_get_socket_idx
  12. atalk_seq_socket_start
  13. atalk_seq_socket_next
  14. atalk_seq_socket_stop
  15. atalk_seq_socket_show
  16. atalk_seq_interface_open
  17. atalk_seq_route_open
  18. atalk_seq_socket_open
  19. atalk_proc_init
  20. atalk_proc_exit

/*
 *      atalk_proc.c - proc support for Appletalk
 *
 *      Copyright(c) Arnaldo Carvalho de Melo <acme@conectiva.com.br>
 *
 *      This program is free software; you can redistribute it and/or modify it
 *      under the terms of the GNU General Public License as published by the
 *      Free Software Foundation, version 2.
 */

#include <linux/init.h>
#include <linux/proc_fs.h>
#include <linux/seq_file.h>
#include <net/net_namespace.h>
#include <net/sock.h>
#include <linux/atalk.h>


static __inline__ struct atalk_iface *atalk_get_interface_idx(loff_t pos)
{
        struct atalk_iface *i;

        for (i = atalk_interfaces; pos && i; i = i->next)
                --pos;

        return i;
}

static void *atalk_seq_interface_start(struct seq_file *seq, loff_t *pos)
        __acquires(atalk_interfaces_lock)
{
        loff_t l = *pos;

        read_lock_bh(&atalk_interfaces_lock);
        return l ? atalk_get_interface_idx(--l) : SEQ_START_TOKEN;
}

static void *atalk_seq_interface_next(struct seq_file *seq, void *v, loff_t *pos)
{
        struct atalk_iface *i;

        ++*pos;
        if (v == SEQ_START_TOKEN) {
                i = NULL;
                if (atalk_interfaces)
                        i = atalk_interfaces;
                goto out;
        }
        i = v;
        i = i->next;
out:
        return i;
}

static void atalk_seq_interface_stop(struct seq_file *seq, void *v)
        __releases(atalk_interfaces_lock)
{
        read_unlock_bh(&atalk_interfaces_lock);
}

static int atalk_seq_interface_show(struct seq_file *seq, void *v)
{
        struct atalk_iface *iface;

        if (v == SEQ_START_TOKEN) {
                seq_puts(seq, "Interface        Address   Networks  "
                              "Status\n");
                goto out;
        }

        iface = v;
        seq_printf(seq, "%-16s %04X:%02X  %04X-%04X  %d\n",
                   iface->dev->name, ntohs(iface->address.s_net),
                   iface->address.s_node, ntohs(iface->nets.nr_firstnet),
                   ntohs(iface->nets.nr_lastnet), iface->status);
out:
        return 0;
}

static __inline__ struct atalk_route *atalk_get_route_idx(loff_t pos)
{
        struct atalk_route *r;

        for (r = atalk_routes; pos && r; r = r->next)
                --pos;

        return r;
}

static void *atalk_seq_route_start(struct seq_file *seq, loff_t *pos)
        __acquires(atalk_routes_lock)
{
        loff_t l = *pos;

        read_lock_bh(&atalk_routes_lock);
        return l ? atalk_get_route_idx(--l) : SEQ_START_TOKEN;
}

static void *atalk_seq_route_next(struct seq_file *seq, void *v, loff_t *pos)
{
        struct atalk_route *r;

        ++*pos;
        if (v == SEQ_START_TOKEN) {
                r = NULL;
                if (atalk_routes)
                        r = atalk_routes;
                goto out;
        }
        r = v;
        r = r->next;
out:
        return r;
}

static void atalk_seq_route_stop(struct seq_file *seq, void *v)
        __releases(atalk_routes_lock)
{
        read_unlock_bh(&atalk_routes_lock);
}

static int atalk_seq_route_show(struct seq_file *seq, void *v)
{
        struct atalk_route *rt;

        if (v == SEQ_START_TOKEN) {
                seq_puts(seq, "Target        Router  Flags Dev\n");
                goto out;
        }

        if (atrtr_default.dev) {
                rt = &atrtr_default;
                seq_printf(seq, "Default     %04X:%02X  %-4d  %s\n",
                               ntohs(rt->gateway.s_net), rt->gateway.s_node,
                               rt->flags, rt->dev->name);
        }

        rt = v;
        seq_printf(seq, "%04X:%02X     %04X:%02X  %-4d  %s\n",
                   ntohs(rt->target.s_net), rt->target.s_node,
                   ntohs(rt->gateway.s_net), rt->gateway.s_node,
                   rt->flags, rt->dev->name);
out:
        return 0;
}

static __inline__ struct sock *atalk_get_socket_idx(loff_t pos)
{
        struct sock *s;
        struct hlist_node *node;

        sk_for_each(s, node, &atalk_sockets)
                if (!pos--)
                        goto found;
        s = NULL;
found:
        return s;
}

static void *atalk_seq_socket_start(struct seq_file *seq, loff_t *pos)
        __acquires(atalk_sockets_lock)
{
        loff_t l = *pos;

        read_lock_bh(&atalk_sockets_lock);
        return l ? atalk_get_socket_idx(--l) : SEQ_START_TOKEN;
}

static void *atalk_seq_socket_next(struct seq_file *seq, void *v, loff_t *pos)
{
        struct sock *i;

        ++*pos;
        if (v == SEQ_START_TOKEN) {
                i = sk_head(&atalk_sockets);
                goto out;
        }
        i = sk_next(v);
out:
        return i;
}

static void atalk_seq_socket_stop(struct seq_file *seq, void *v)
        __releases(atalk_sockets_lock)
{
        read_unlock_bh(&atalk_sockets_lock);
}

static int atalk_seq_socket_show(struct seq_file *seq, void *v)
{
        struct sock *s;
        struct atalk_sock *at;

        if (v == SEQ_START_TOKEN) {
                seq_printf(seq, "Type Local_addr  Remote_addr Tx_queue "
                                "Rx_queue St UID\n");
                goto out;
        }

        s = v;
        at = at_sk(s);

        seq_printf(seq, "%02X   %04X:%02X:%02X  %04X:%02X:%02X  %08X:%08X "
                        "%02X %d\n",
                   s->sk_type, ntohs(at->src_net), at->src_node, at->src_port,
                   ntohs(at->dest_net), at->dest_node, at->dest_port,
                   atomic_read(&s->sk_wmem_alloc),
                   atomic_read(&s->sk_rmem_alloc),
                   s->sk_state, SOCK_INODE(s->sk_socket)->i_uid);
out:
        return 0;
}

static const struct seq_operations atalk_seq_interface_ops = {
        .start  = atalk_seq_interface_start,
        .next   = atalk_seq_interface_next,
        .stop   = atalk_seq_interface_stop,
        .show   = atalk_seq_interface_show,
};

static const struct seq_operations atalk_seq_route_ops = {
        .start  = atalk_seq_route_start,
        .next   = atalk_seq_route_next,
        .stop   = atalk_seq_route_stop,
        .show   = atalk_seq_route_show,
};

static const struct seq_operations atalk_seq_socket_ops = {
        .start  = atalk_seq_socket_start,
        .next   = atalk_seq_socket_next,
        .stop   = atalk_seq_socket_stop,
        .show   = atalk_seq_socket_show,
};

static int atalk_seq_interface_open(struct inode *inode, struct file *file)
{
        return seq_open(file, &atalk_seq_interface_ops);
}

static int atalk_seq_route_open(struct inode *inode, struct file *file)
{
        return seq_open(file, &atalk_seq_route_ops);
}

static int atalk_seq_socket_open(struct inode *inode, struct file *file)
{
        return seq_open(file, &atalk_seq_socket_ops);
}

static const struct file_operations atalk_seq_interface_fops = {
        .owner          = THIS_MODULE,
        .open           = atalk_seq_interface_open,
        .read           = seq_read,
        .llseek         = seq_lseek,
        .release        = seq_release,
};

static const struct file_operations atalk_seq_route_fops = {
        .owner          = THIS_MODULE,
        .open           = atalk_seq_route_open,
        .read           = seq_read,
        .llseek         = seq_lseek,
        .release        = seq_release,
};

static const struct file_operations atalk_seq_socket_fops = {
        .owner          = THIS_MODULE,
        .open           = atalk_seq_socket_open,
        .read           = seq_read,
        .llseek         = seq_lseek,
        .release        = seq_release,
};

static struct proc_dir_entry *atalk_proc_dir;

int __init atalk_proc_init(void)
{
        struct proc_dir_entry *p;
        int rc = -ENOMEM;

        atalk_proc_dir = proc_mkdir("atalk", init_net.proc_net);
        if (!atalk_proc_dir)
                goto out;
        atalk_proc_dir->owner = THIS_MODULE;

        p = proc_create("interface", S_IRUGO, atalk_proc_dir,
                        &atalk_seq_interface_fops);
        if (!p)
                goto out_interface;

        p = proc_create("route", S_IRUGO, atalk_proc_dir,
                        &atalk_seq_route_fops);
        if (!p)
                goto out_route;

        p = proc_create("socket", S_IRUGO, atalk_proc_dir,
                        &atalk_seq_socket_fops);
        if (!p)
                goto out_socket;

        p = proc_create("arp", S_IRUGO, atalk_proc_dir, &atalk_seq_arp_fops);
        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;
}

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);
}

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