1 /* 2 * net/dccp/sysctl.c 3 * 4 * An implementation of the DCCP protocol 5 * Arnaldo Carvalho de Melo <acme@mandriva.com> 6 * 7 * This program is free software; you can redistribute it and/or 8 * modify it under the terms of the GNU General Public License v2 9 * as published by the Free Software Foundation. 10 */ 11 12 #include <linux/mm.h> 13 #include <linux/sysctl.h> 14 #include "dccp.h" 15 #include "feat.h" 16 17 #ifndef CONFIG_SYSCTL 18 #error This file should not be compiled without CONFIG_SYSCTL defined 19 #endif 20 21 /* Boundary values */ 22 static int zero = 0, 23 one = 1, 24 u8_max = 0xFF; 25 static unsigned long seqw_min = DCCPF_SEQ_WMIN, 26 seqw_max = 0xFFFFFFFF; /* maximum on 32 bit */ 27 28 static struct ctl_table dccp_default_table[] = { 29 { 30 .procname = "seq_window", 31 .data = &sysctl_dccp_sequence_window, 32 .maxlen = sizeof(sysctl_dccp_sequence_window), 33 .mode = 0644, 34 .proc_handler = proc_doulongvec_minmax, 35 .extra1 = &seqw_min, /* RFC 4340, 7.5.2 */ 36 .extra2 = &seqw_max, 37 }, 38 { 39 .procname = "rx_ccid", 40 .data = &sysctl_dccp_rx_ccid, 41 .maxlen = sizeof(sysctl_dccp_rx_ccid), 42 .mode = 0644, 43 .proc_handler = proc_dointvec_minmax, 44 .extra1 = &zero, 45 .extra2 = &u8_max, /* RFC 4340, 10. */ 46 }, 47 { 48 .procname = "tx_ccid", 49 .data = &sysctl_dccp_tx_ccid, 50 .maxlen = sizeof(sysctl_dccp_tx_ccid), 51 .mode = 0644, 52 .proc_handler = proc_dointvec_minmax, 53 .extra1 = &zero, 54 .extra2 = &u8_max, /* RFC 4340, 10. */ 55 }, 56 { 57 .procname = "request_retries", 58 .data = &sysctl_dccp_request_retries, 59 .maxlen = sizeof(sysctl_dccp_request_retries), 60 .mode = 0644, 61 .proc_handler = proc_dointvec_minmax, 62 .extra1 = &one, 63 .extra2 = &u8_max, 64 }, 65 { 66 .procname = "retries1", 67 .data = &sysctl_dccp_retries1, 68 .maxlen = sizeof(sysctl_dccp_retries1), 69 .mode = 0644, 70 .proc_handler = proc_dointvec_minmax, 71 .extra1 = &zero, 72 .extra2 = &u8_max, 73 }, 74 { 75 .procname = "retries2", 76 .data = &sysctl_dccp_retries2, 77 .maxlen = sizeof(sysctl_dccp_retries2), 78 .mode = 0644, 79 .proc_handler = proc_dointvec_minmax, 80 .extra1 = &zero, 81 .extra2 = &u8_max, 82 }, 83 { 84 .procname = "tx_qlen", 85 .data = &sysctl_dccp_tx_qlen, 86 .maxlen = sizeof(sysctl_dccp_tx_qlen), 87 .mode = 0644, 88 .proc_handler = proc_dointvec_minmax, 89 .extra1 = &zero, 90 }, 91 { 92 .procname = "sync_ratelimit", 93 .data = &sysctl_dccp_sync_ratelimit, 94 .maxlen = sizeof(sysctl_dccp_sync_ratelimit), 95 .mode = 0644, 96 .proc_handler = proc_dointvec_ms_jiffies, 97 }, 98 99 { } 100 }; 101 102 static struct ctl_table_header *dccp_table_header; 103 104 int __init dccp_sysctl_init(void) 105 { 106 dccp_table_header = register_net_sysctl(&init_net, "net/dccp/default", 107 dccp_default_table); 108 109 return dccp_table_header != NULL ? 0 : -ENOMEM; 110 } 111 112 void dccp_sysctl_exit(void) 113 { 114 if (dccp_table_header != NULL) { 115 unregister_net_sysctl_table(dccp_table_header); 116 dccp_table_header = NULL; 117 } 118 } 119