1 /* 2 * NET4: Sysctl interface to net af_unix subsystem. 3 * 4 * Authors: Mike Shaver. 5 * 6 * This program is free software; you can redistribute it and/or 7 * modify it under the terms of the GNU General Public License 8 * as published by the Free Software Foundation; either version 9 * 2 of the License, or (at your option) any later version. 10 */ 11 12 #include <linux/mm.h> 13 #include <linux/sysctl.h> 14 15 #include <net/af_unix.h> 16 17 static ctl_table unix_table[] = { 18 { 19 .procname = "max_dgram_qlen", 20 .data = &init_net.unx.sysctl_max_dgram_qlen, 21 .maxlen = sizeof(int), 22 .mode = 0644, 23 .proc_handler = proc_dointvec 24 }, 25 { } 26 }; 27 28 static struct ctl_path unix_path[] = { 29 { .procname = "net", }, 30 { .procname = "unix", }, 31 { }, 32 }; 33 34 int unix_sysctl_register(struct net *net) 35 { 36 struct ctl_table *table; 37 38 table = kmemdup(unix_table, sizeof(unix_table), GFP_KERNEL); 39 if (table == NULL) 40 goto err_alloc; 41 42 table[0].data = &net->unx.sysctl_max_dgram_qlen; 43 net->unx.ctl = register_net_sysctl_table(net, unix_path, table); 44 if (net->unx.ctl == NULL) 45 goto err_reg; 46 47 return 0; 48 49 err_reg: 50 kfree(table); 51 err_alloc: 52 return -ENOMEM; 53 } 54 55 void unix_sysctl_unregister(struct net *net) 56 { 57 struct ctl_table *table; 58 59 table = net->unx.ctl->ctl_table_arg; 60 unregister_sysctl_table(net->unx.ctl); 61 kfree(table); 62 } 63