// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* NET4: Sysctl interface to net af_unix subsystem.
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*
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* Authors: Mike Shaver.
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*/
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#include <linux/mm.h>
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#include <linux/slab.h>
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#include <linux/sysctl.h>
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#include <net/af_unix.h>
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static struct ctl_table unix_table[] = {
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{
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.procname = "max_dgram_qlen",
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.data = &init_net.unx.sysctl_max_dgram_qlen,
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.maxlen = sizeof(int),
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.mode = 0644,
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.proc_handler = proc_dointvec
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},
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{ }
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};
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int __net_init unix_sysctl_register(struct net *net)
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{
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struct ctl_table *table;
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table = kmemdup(unix_table, sizeof(unix_table), GFP_KERNEL);
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if (table == NULL)
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goto err_alloc;
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/* Don't export sysctls to unprivileged users */
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if (net->user_ns != &init_user_ns)
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table[0].procname = NULL;
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table[0].data = &net->unx.sysctl_max_dgram_qlen;
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net->unx.ctl = register_net_sysctl(net, "net/unix", table);
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if (net->unx.ctl == NULL)
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goto err_reg;
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return 0;
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err_reg:
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kfree(table);
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err_alloc:
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return -ENOMEM;
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}
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void unix_sysctl_unregister(struct net *net)
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{
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struct ctl_table *table;
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table = net->unx.ctl->ctl_table_arg;
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unregister_net_sysctl_table(net->unx.ctl);
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kfree(table);
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}
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