| // SPDX-License-Identifier: GPL-2.0-only |
| /* |
| * net/dccp/sysctl.c |
| * |
| * An implementation of the DCCP protocol |
| * Arnaldo Carvalho de Melo <acme@mandriva.com> |
| */ |
| |
| #include <linux/mm.h> |
| #include <linux/sysctl.h> |
| #include "dccp.h" |
| #include "feat.h" |
| |
| #ifndef CONFIG_SYSCTL |
| #error This file should not be compiled without CONFIG_SYSCTL defined |
| #endif |
| |
| /* Boundary values */ |
| static int zero = 0, |
| one = 1, |
| u8_max = 0xFF; |
| static unsigned long seqw_min = DCCPF_SEQ_WMIN, |
| seqw_max = 0xFFFFFFFF; /* maximum on 32 bit */ |
| |
| static struct ctl_table dccp_default_table[] = { |
| { |
| .procname = "seq_window", |
| .data = &sysctl_dccp_sequence_window, |
| .maxlen = sizeof(sysctl_dccp_sequence_window), |
| .mode = 0644, |
| .proc_handler = proc_doulongvec_minmax, |
| .extra1 = &seqw_min, /* RFC 4340, 7.5.2 */ |
| .extra2 = &seqw_max, |
| }, |
| { |
| .procname = "rx_ccid", |
| .data = &sysctl_dccp_rx_ccid, |
| .maxlen = sizeof(sysctl_dccp_rx_ccid), |
| .mode = 0644, |
| .proc_handler = proc_dointvec_minmax, |
| .extra1 = &zero, |
| .extra2 = &u8_max, /* RFC 4340, 10. */ |
| }, |
| { |
| .procname = "tx_ccid", |
| .data = &sysctl_dccp_tx_ccid, |
| .maxlen = sizeof(sysctl_dccp_tx_ccid), |
| .mode = 0644, |
| .proc_handler = proc_dointvec_minmax, |
| .extra1 = &zero, |
| .extra2 = &u8_max, /* RFC 4340, 10. */ |
| }, |
| { |
| .procname = "request_retries", |
| .data = &sysctl_dccp_request_retries, |
| .maxlen = sizeof(sysctl_dccp_request_retries), |
| .mode = 0644, |
| .proc_handler = proc_dointvec_minmax, |
| .extra1 = &one, |
| .extra2 = &u8_max, |
| }, |
| { |
| .procname = "retries1", |
| .data = &sysctl_dccp_retries1, |
| .maxlen = sizeof(sysctl_dccp_retries1), |
| .mode = 0644, |
| .proc_handler = proc_dointvec_minmax, |
| .extra1 = &zero, |
| .extra2 = &u8_max, |
| }, |
| { |
| .procname = "retries2", |
| .data = &sysctl_dccp_retries2, |
| .maxlen = sizeof(sysctl_dccp_retries2), |
| .mode = 0644, |
| .proc_handler = proc_dointvec_minmax, |
| .extra1 = &zero, |
| .extra2 = &u8_max, |
| }, |
| { |
| .procname = "tx_qlen", |
| .data = &sysctl_dccp_tx_qlen, |
| .maxlen = sizeof(sysctl_dccp_tx_qlen), |
| .mode = 0644, |
| .proc_handler = proc_dointvec_minmax, |
| .extra1 = &zero, |
| }, |
| { |
| .procname = "sync_ratelimit", |
| .data = &sysctl_dccp_sync_ratelimit, |
| .maxlen = sizeof(sysctl_dccp_sync_ratelimit), |
| .mode = 0644, |
| .proc_handler = proc_dointvec_ms_jiffies, |
| }, |
| |
| { } |
| }; |
| |
| static struct ctl_table_header *dccp_table_header; |
| |
| int __init dccp_sysctl_init(void) |
| { |
| dccp_table_header = register_net_sysctl(&init_net, "net/dccp/default", |
| dccp_default_table); |
| |
| return dccp_table_header != NULL ? 0 : -ENOMEM; |
| } |
| |
| void dccp_sysctl_exit(void) |
| { |
| if (dccp_table_header != NULL) { |
| unregister_net_sysctl_table(dccp_table_header); |
| dccp_table_header = NULL; |
| } |
| } |