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 u8_max = 0xFF; 24 static unsigned long seqw_min = DCCPF_SEQ_WMIN, 25 seqw_max = 0xFFFFFFFF; /* maximum on 32 bit */ 26 27 static struct ctl_table dccp_default_table[] = { 28 { 29 .procname = "seq_window", 30 .data = &sysctl_dccp_sequence_window, 31 .maxlen = sizeof(sysctl_dccp_sequence_window), 32 .mode = 0644, 33 .proc_handler = proc_doulongvec_minmax, 34 .extra1 = &seqw_min, /* RFC 4340, 7.5.2 */ 35 .extra2 = &seqw_max, 36 }, 37 { 38 .procname = "rx_ccid", 39 .data = &sysctl_dccp_rx_ccid, 40 .maxlen = sizeof(sysctl_dccp_rx_ccid), 41 .mode = 0644, 42 .proc_handler = proc_dointvec_minmax, 43 .extra1 = &zero, 44 .extra2 = &u8_max, /* RFC 4340, 10. */ 45 }, 46 { 47 .procname = "tx_ccid", 48 .data = &sysctl_dccp_tx_ccid, 49 .maxlen = sizeof(sysctl_dccp_tx_ccid), 50 .mode = 0644, 51 .proc_handler = proc_dointvec_minmax, 52 .extra1 = &zero, 53 .extra2 = &u8_max, /* RFC 4340, 10. */ 54 }, 55 { 56 .procname = "request_retries", 57 .data = &sysctl_dccp_request_retries, 58 .maxlen = sizeof(sysctl_dccp_request_retries), 59 .mode = 0644, 60 .proc_handler = proc_dointvec_minmax, 61 .extra1 = &zero, 62 .extra2 = &u8_max, 63 }, 64 { 65 .procname = "retries1", 66 .data = &sysctl_dccp_retries1, 67 .maxlen = sizeof(sysctl_dccp_retries1), 68 .mode = 0644, 69 .proc_handler = proc_dointvec_minmax, 70 .extra1 = &zero, 71 .extra2 = &u8_max, 72 }, 73 { 74 .procname = "retries2", 75 .data = &sysctl_dccp_retries2, 76 .maxlen = sizeof(sysctl_dccp_retries2), 77 .mode = 0644, 78 .proc_handler = proc_dointvec_minmax, 79 .extra1 = &zero, 80 .extra2 = &u8_max, 81 }, 82 { 83 .procname = "tx_qlen", 84 .data = &sysctl_dccp_tx_qlen, 85 .maxlen = sizeof(sysctl_dccp_tx_qlen), 86 .mode = 0644, 87 .proc_handler = proc_dointvec_minmax, 88 .extra1 = &zero, 89 }, 90 { 91 .procname = "sync_ratelimit", 92 .data = &sysctl_dccp_sync_ratelimit, 93 .maxlen = sizeof(sysctl_dccp_sync_ratelimit), 94 .mode = 0644, 95 .proc_handler = proc_dointvec_ms_jiffies, 96 }, 97 98 { } 99 }; 100 101 static struct ctl_path dccp_path[] = { 102 { .procname = "net", }, 103 { .procname = "dccp", }, 104 { .procname = "default", }, 105 { } 106 }; 107 108 static struct ctl_table_header *dccp_table_header; 109 110 int __init dccp_sysctl_init(void) 111 { 112 dccp_table_header = register_sysctl_paths(dccp_path, 113 dccp_default_table); 114 115 return dccp_table_header != NULL ? 0 : -ENOMEM; 116 } 117 118 void dccp_sysctl_exit(void) 119 { 120 if (dccp_table_header != NULL) { 121 unregister_sysctl_table(dccp_table_header); 122 dccp_table_header = NULL; 123 } 124 } 125