root/net/core/sysctl_net_core.c

DEFINITIONS

1. sysctl_core_net_init
2. sysctl_core_net_exit
3. sysctl_core_init

/* -*- linux-c -*-
 * sysctl_net_core.c: sysctl interface to net core subsystem.
 *
 * Begun April 1, 1996, Mike Shaver.
 * Added /proc/sys/net/core directory entry (empty =) ). [MS]
 */

#include <linux/mm.h>
#include <linux/sysctl.h>
#include <linux/module.h>
#include <linux/socket.h>
#include <linux/netdevice.h>
#include <linux/init.h>
#include <net/sock.h>
#include <net/xfrm.h>

static struct ctl_table net_core_table[] = {
#ifdef CONFIG_NET
        {
                .ctl_name       = NET_CORE_WMEM_MAX,
                .procname       = "wmem_max",
                .data           = &sysctl_wmem_max,
                .maxlen         = sizeof(int),
                .mode           = 0644,
                .proc_handler   = &proc_dointvec
        },
        {
                .ctl_name       = NET_CORE_RMEM_MAX,
                .procname       = "rmem_max",
                .data           = &sysctl_rmem_max,
                .maxlen         = sizeof(int),
                .mode           = 0644,
                .proc_handler   = &proc_dointvec
        },
        {
                .ctl_name       = NET_CORE_WMEM_DEFAULT,
                .procname       = "wmem_default",
                .data           = &sysctl_wmem_default,
                .maxlen         = sizeof(int),
                .mode           = 0644,
                .proc_handler   = &proc_dointvec
        },
        {
                .ctl_name       = NET_CORE_RMEM_DEFAULT,
                .procname       = "rmem_default",
                .data           = &sysctl_rmem_default,
                .maxlen         = sizeof(int),
                .mode           = 0644,
                .proc_handler   = &proc_dointvec
        },
        {
                .ctl_name       = NET_CORE_DEV_WEIGHT,
                .procname       = "dev_weight",
                .data           = &weight_p,
                .maxlen         = sizeof(int),
                .mode           = 0644,
                .proc_handler   = &proc_dointvec
        },
        {
                .ctl_name       = NET_CORE_MAX_BACKLOG,
                .procname       = "netdev_max_backlog",
                .data           = &netdev_max_backlog,
                .maxlen         = sizeof(int),
                .mode           = 0644,
                .proc_handler   = &proc_dointvec
        },
        {
                .ctl_name       = NET_CORE_MSG_COST,
                .procname       = "message_cost",
                .data           = &net_ratelimit_state.interval,
                .maxlen         = sizeof(int),
                .mode           = 0644,
                .proc_handler   = &proc_dointvec_jiffies,
                .strategy       = &sysctl_jiffies,
        },
        {
                .ctl_name       = NET_CORE_MSG_BURST,
                .procname       = "message_burst",
                .data           = &net_ratelimit_state.burst,
                .maxlen         = sizeof(int),
                .mode           = 0644,
                .proc_handler   = &proc_dointvec,
        },
        {
                .ctl_name       = NET_CORE_OPTMEM_MAX,
                .procname       = "optmem_max",
                .data           = &sysctl_optmem_max,
                .maxlen         = sizeof(int),
                .mode           = 0644,
                .proc_handler   = &proc_dointvec
        },
#ifdef CONFIG_XFRM
        {
                .ctl_name       = NET_CORE_AEVENT_ETIME,
                .procname       = "xfrm_aevent_etime",
                .data           = &sysctl_xfrm_aevent_etime,
                .maxlen         = sizeof(u32),
                .mode           = 0644,
                .proc_handler   = &proc_dointvec
        },
        {
                .ctl_name       = NET_CORE_AEVENT_RSEQTH,
                .procname       = "xfrm_aevent_rseqth",
                .data           = &sysctl_xfrm_aevent_rseqth,
                .maxlen         = sizeof(u32),
                .mode           = 0644,
                .proc_handler   = &proc_dointvec
        },
        {
                .ctl_name       = CTL_UNNUMBERED,
                .procname       = "xfrm_larval_drop",
                .data           = &sysctl_xfrm_larval_drop,
                .maxlen         = sizeof(int),
                .mode           = 0644,
                .proc_handler   = &proc_dointvec
        },
        {
                .ctl_name       = CTL_UNNUMBERED,
                .procname       = "xfrm_acq_expires",
                .data           = &sysctl_xfrm_acq_expires,
                .maxlen         = sizeof(int),
                .mode           = 0644,
                .proc_handler   = &proc_dointvec
        },
#endif /* CONFIG_XFRM */
#endif /* CONFIG_NET */
        {
                .ctl_name       = NET_CORE_BUDGET,
                .procname       = "netdev_budget",
                .data           = &netdev_budget,
                .maxlen         = sizeof(int),
                .mode           = 0644,
                .proc_handler   = &proc_dointvec
        },
        {
                .ctl_name       = NET_CORE_WARNINGS,
                .procname       = "warnings",
                .data           = &net_msg_warn,
                .maxlen         = sizeof(int),
                .mode           = 0644,
                .proc_handler   = &proc_dointvec
        },
        { .ctl_name = 0 }
};

static struct ctl_table netns_core_table[] = {
        {
                .ctl_name       = NET_CORE_SOMAXCONN,
                .procname       = "somaxconn",
                .data           = &init_net.core.sysctl_somaxconn,
                .maxlen         = sizeof(int),
                .mode           = 0644,
                .proc_handler   = &proc_dointvec
        },
        { .ctl_name = 0 }
};

static __net_initdata struct ctl_path net_core_path[] = {
        { .procname = "net", .ctl_name = CTL_NET, },
        { .procname = "core", .ctl_name = NET_CORE, },
        { },
};

static __net_init int sysctl_core_net_init(struct net *net)
{
        struct ctl_table *tbl;

        net->core.sysctl_somaxconn = SOMAXCONN;

        tbl = netns_core_table;
        if (net != &init_net) {
                tbl = kmemdup(tbl, sizeof(netns_core_table), GFP_KERNEL);
                if (tbl == NULL)
                        goto err_dup;

                tbl[0].data = &net->core.sysctl_somaxconn;
        }

        net->core.sysctl_hdr = register_net_sysctl_table(net,
                        net_core_path, tbl);
        if (net->core.sysctl_hdr == NULL)
                goto err_reg;

        return 0;

err_reg:
        if (tbl != netns_core_table)
                kfree(tbl);
err_dup:
        return -ENOMEM;
}

static __net_exit void sysctl_core_net_exit(struct net *net)
{
        struct ctl_table *tbl;

        tbl = net->core.sysctl_hdr->ctl_table_arg;
        unregister_net_sysctl_table(net->core.sysctl_hdr);
        BUG_ON(tbl == netns_core_table);
        kfree(tbl);
}

static __net_initdata struct pernet_operations sysctl_core_ops = {
        .init = sysctl_core_net_init,
        .exit = sysctl_core_net_exit,
};

static __init int sysctl_core_init(void)
{
        register_net_sysctl_rotable(net_core_path, net_core_table);
        return register_pernet_subsys(&sysctl_core_ops);
}

__initcall(sysctl_core_init);