/* * NET4: Sysctl interface to net af_unix subsystem. * * Authors: Mike Shaver. * * 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; either version * 2 of the License, or (at your option) any later version. */ #include <linux/mm.h> #include <linux/slab.h> #include <linux/sysctl.h> #include <net/af_unix.h> static struct ctl_table unix_table[] = { { .procname = "max_dgram_qlen", .data = &init_net.unx.sysctl_max_dgram_qlen, .maxlen = sizeof(int), .mode = 0644, .proc_handler = proc_dointvec }, { } }; int __net_init unix_sysctl_register(struct net *net) { struct ctl_table *table; table = kmemdup(unix_table, sizeof(unix_table), GFP_KERNEL); if (table == NULL) goto err_alloc; /* Don't export sysctls to unprivileged users */ if (net->user_ns != &init_user_ns) table[0].procname = NULL; table[0].data = &net->unx.sysctl_max_dgram_qlen; net->unx.ctl = register_net_sysctl(net, "net/unix", table); if (net->unx.ctl == NULL) goto err_reg; return 0; err_reg: kfree(table); err_alloc: return -ENOMEM; } void unix_sysctl_unregister(struct net *net) { struct ctl_table *table; table = net->unx.ctl->ctl_table_arg; unregister_net_sysctl_table(net->unx.ctl); kfree(table); }