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 .ctl_name = NET_UNIX_MAX_DGRAM_QLEN, 20 .procname = "max_dgram_qlen", 21 .data = &init_net.unx.sysctl_max_dgram_qlen, 22 .maxlen = sizeof(int), 23 .mode = 0644, 24 .proc_handler = proc_dointvec 25 }, 26 { .ctl_name = 0 } 27 }; 28 29 static struct ctl_path unix_path[] = { 30 { .procname = "net", .ctl_name = CTL_NET, }, 31 { .procname = "unix", .ctl_name = NET_UNIX, }, 32 { }, 33 }; 34 35 int unix_sysctl_register(struct net *net) 36 { 37 struct ctl_table *table; 38 39 table = kmemdup(unix_table, sizeof(unix_table), GFP_KERNEL); 40 if (table == NULL) 41 goto err_alloc; 42 43 table[0].data = &net->unx.sysctl_max_dgram_qlen; 44 net->unx.ctl = register_net_sysctl_table(net, unix_path, table); 45 if (net->unx.ctl == NULL) 46 goto err_reg; 47 48 return 0; 49 50 err_reg: 51 kfree(table); 52 err_alloc: 53 return -ENOMEM; 54 } 55 56 void unix_sysctl_unregister(struct net *net) 57 { 58 struct ctl_table *table; 59 60 table = net->unx.ctl->ctl_table_arg; 61 unregister_sysctl_table(net->unx.ctl); 62 kfree(table); 63 } 64