Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* -*- linux-c -*- |
| 2 | * sysctl_net_core.c: sysctl interface to net core subsystem. |
| 3 | * |
| 4 | * Begun April 1, 1996, Mike Shaver. |
| 5 | * Added /proc/sys/net/core directory entry (empty =) ). [MS] |
| 6 | */ |
| 7 | |
| 8 | #include <linux/mm.h> |
| 9 | #include <linux/sysctl.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 10 | #include <linux/module.h> |
Arnaldo Carvalho de Melo | 2038073 | 2005-08-16 02:18:02 -0300 | [diff] [blame] | 11 | #include <linux/socket.h> |
Pavel Emelyanov | a37ae40 | 2007-10-23 21:13:53 -0700 | [diff] [blame] | 12 | #include <linux/netdevice.h> |
Pavel Emelyanov | 33eb9cf | 2007-12-05 01:37:34 -0800 | [diff] [blame] | 13 | #include <linux/init.h> |
Arnaldo Carvalho de Melo | 2038073 | 2005-08-16 02:18:02 -0300 | [diff] [blame] | 14 | #include <net/sock.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 15 | |
Pavel Emelyanov | 33eb9cf | 2007-12-05 01:37:34 -0800 | [diff] [blame] | 16 | static struct ctl_table net_core_table[] = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 17 | #ifdef CONFIG_NET |
| 18 | { |
| 19 | .ctl_name = NET_CORE_WMEM_MAX, |
| 20 | .procname = "wmem_max", |
| 21 | .data = &sysctl_wmem_max, |
| 22 | .maxlen = sizeof(int), |
| 23 | .mode = 0644, |
Alexey Dobriyan | 6d9f239 | 2008-11-03 18:21:05 -0800 | [diff] [blame] | 24 | .proc_handler = proc_dointvec |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 25 | }, |
| 26 | { |
| 27 | .ctl_name = NET_CORE_RMEM_MAX, |
| 28 | .procname = "rmem_max", |
| 29 | .data = &sysctl_rmem_max, |
| 30 | .maxlen = sizeof(int), |
| 31 | .mode = 0644, |
Alexey Dobriyan | 6d9f239 | 2008-11-03 18:21:05 -0800 | [diff] [blame] | 32 | .proc_handler = proc_dointvec |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 33 | }, |
| 34 | { |
| 35 | .ctl_name = NET_CORE_WMEM_DEFAULT, |
| 36 | .procname = "wmem_default", |
| 37 | .data = &sysctl_wmem_default, |
| 38 | .maxlen = sizeof(int), |
| 39 | .mode = 0644, |
Alexey Dobriyan | 6d9f239 | 2008-11-03 18:21:05 -0800 | [diff] [blame] | 40 | .proc_handler = proc_dointvec |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 41 | }, |
| 42 | { |
| 43 | .ctl_name = NET_CORE_RMEM_DEFAULT, |
| 44 | .procname = "rmem_default", |
| 45 | .data = &sysctl_rmem_default, |
| 46 | .maxlen = sizeof(int), |
| 47 | .mode = 0644, |
Alexey Dobriyan | 6d9f239 | 2008-11-03 18:21:05 -0800 | [diff] [blame] | 48 | .proc_handler = proc_dointvec |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 49 | }, |
| 50 | { |
| 51 | .ctl_name = NET_CORE_DEV_WEIGHT, |
| 52 | .procname = "dev_weight", |
| 53 | .data = &weight_p, |
| 54 | .maxlen = sizeof(int), |
| 55 | .mode = 0644, |
Alexey Dobriyan | 6d9f239 | 2008-11-03 18:21:05 -0800 | [diff] [blame] | 56 | .proc_handler = proc_dointvec |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 57 | }, |
| 58 | { |
| 59 | .ctl_name = NET_CORE_MAX_BACKLOG, |
| 60 | .procname = "netdev_max_backlog", |
| 61 | .data = &netdev_max_backlog, |
| 62 | .maxlen = sizeof(int), |
| 63 | .mode = 0644, |
Alexey Dobriyan | 6d9f239 | 2008-11-03 18:21:05 -0800 | [diff] [blame] | 64 | .proc_handler = proc_dointvec |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 65 | }, |
| 66 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 67 | .ctl_name = NET_CORE_MSG_COST, |
| 68 | .procname = "message_cost", |
Dave Young | 717115e | 2008-07-25 01:45:58 -0700 | [diff] [blame] | 69 | .data = &net_ratelimit_state.interval, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 70 | .maxlen = sizeof(int), |
| 71 | .mode = 0644, |
Alexey Dobriyan | 6d9f239 | 2008-11-03 18:21:05 -0800 | [diff] [blame] | 72 | .proc_handler = proc_dointvec_jiffies, |
| 73 | .strategy = sysctl_jiffies, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 74 | }, |
| 75 | { |
| 76 | .ctl_name = NET_CORE_MSG_BURST, |
| 77 | .procname = "message_burst", |
Dave Young | 717115e | 2008-07-25 01:45:58 -0700 | [diff] [blame] | 78 | .data = &net_ratelimit_state.burst, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 79 | .maxlen = sizeof(int), |
| 80 | .mode = 0644, |
Alexey Dobriyan | 6d9f239 | 2008-11-03 18:21:05 -0800 | [diff] [blame] | 81 | .proc_handler = proc_dointvec, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 82 | }, |
| 83 | { |
| 84 | .ctl_name = NET_CORE_OPTMEM_MAX, |
| 85 | .procname = "optmem_max", |
| 86 | .data = &sysctl_optmem_max, |
| 87 | .maxlen = sizeof(int), |
| 88 | .mode = 0644, |
Alexey Dobriyan | 6d9f239 | 2008-11-03 18:21:05 -0800 | [diff] [blame] | 89 | .proc_handler = proc_dointvec |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 90 | }, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 91 | #endif /* CONFIG_NET */ |
| 92 | { |
Stephen Hemminger | 51b0bde | 2005-06-23 20:14:40 -0700 | [diff] [blame] | 93 | .ctl_name = NET_CORE_BUDGET, |
| 94 | .procname = "netdev_budget", |
| 95 | .data = &netdev_budget, |
| 96 | .maxlen = sizeof(int), |
| 97 | .mode = 0644, |
Alexey Dobriyan | 6d9f239 | 2008-11-03 18:21:05 -0800 | [diff] [blame] | 98 | .proc_handler = proc_dointvec |
Stephen Hemminger | 51b0bde | 2005-06-23 20:14:40 -0700 | [diff] [blame] | 99 | }, |
Stephen Hemminger | a2a316f | 2007-03-08 20:41:08 -0800 | [diff] [blame] | 100 | { |
| 101 | .ctl_name = NET_CORE_WARNINGS, |
| 102 | .procname = "warnings", |
| 103 | .data = &net_msg_warn, |
| 104 | .maxlen = sizeof(int), |
| 105 | .mode = 0644, |
Alexey Dobriyan | 6d9f239 | 2008-11-03 18:21:05 -0800 | [diff] [blame] | 106 | .proc_handler = proc_dointvec |
Stephen Hemminger | a2a316f | 2007-03-08 20:41:08 -0800 | [diff] [blame] | 107 | }, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 108 | { .ctl_name = 0 } |
| 109 | }; |
Pavel Emelyanov | 33eb9cf | 2007-12-05 01:37:34 -0800 | [diff] [blame] | 110 | |
Pavel Emelyanov | d5a4502 | 2008-05-19 13:49:52 -0700 | [diff] [blame] | 111 | static struct ctl_table netns_core_table[] = { |
| 112 | { |
| 113 | .ctl_name = NET_CORE_SOMAXCONN, |
| 114 | .procname = "somaxconn", |
| 115 | .data = &init_net.core.sysctl_somaxconn, |
| 116 | .maxlen = sizeof(int), |
| 117 | .mode = 0644, |
Alexey Dobriyan | 6d9f239 | 2008-11-03 18:21:05 -0800 | [diff] [blame] | 118 | .proc_handler = proc_dointvec |
Pavel Emelyanov | d5a4502 | 2008-05-19 13:49:52 -0700 | [diff] [blame] | 119 | }, |
| 120 | { .ctl_name = 0 } |
| 121 | }; |
| 122 | |
Alexey Dobriyan | b27aead | 2008-11-25 18:00:48 -0800 | [diff] [blame] | 123 | __net_initdata struct ctl_path net_core_path[] = { |
Pavel Emelyanov | 33eb9cf | 2007-12-05 01:37:34 -0800 | [diff] [blame] | 124 | { .procname = "net", .ctl_name = CTL_NET, }, |
| 125 | { .procname = "core", .ctl_name = NET_CORE, }, |
| 126 | { }, |
| 127 | }; |
| 128 | |
Pavel Emelyanov | 024626e | 2007-12-08 00:09:24 -0800 | [diff] [blame] | 129 | static __net_init int sysctl_core_net_init(struct net *net) |
| 130 | { |
Pavel Emelyanov | d5a4502 | 2008-05-19 13:49:52 -0700 | [diff] [blame] | 131 | struct ctl_table *tbl; |
Pavel Emelyanov | 024626e | 2007-12-08 00:09:24 -0800 | [diff] [blame] | 132 | |
Pavel Emelyanov | 8efa6e9 | 2008-03-31 19:41:14 -0700 | [diff] [blame] | 133 | net->core.sysctl_somaxconn = SOMAXCONN; |
Pavel Emelyanov | b8e1f9b | 2007-12-08 00:12:33 -0800 | [diff] [blame] | 134 | |
Pavel Emelyanov | d5a4502 | 2008-05-19 13:49:52 -0700 | [diff] [blame] | 135 | tbl = netns_core_table; |
Pavel Emelyanov | 024626e | 2007-12-08 00:09:24 -0800 | [diff] [blame] | 136 | if (net != &init_net) { |
Pavel Emelyanov | d5a4502 | 2008-05-19 13:49:52 -0700 | [diff] [blame] | 137 | tbl = kmemdup(tbl, sizeof(netns_core_table), GFP_KERNEL); |
Pavel Emelyanov | 024626e | 2007-12-08 00:09:24 -0800 | [diff] [blame] | 138 | if (tbl == NULL) |
| 139 | goto err_dup; |
| 140 | |
Pavel Emelyanov | d5a4502 | 2008-05-19 13:49:52 -0700 | [diff] [blame] | 141 | tbl[0].data = &net->core.sysctl_somaxconn; |
Pavel Emelyanov | 024626e | 2007-12-08 00:09:24 -0800 | [diff] [blame] | 142 | } |
| 143 | |
Pavel Emelyanov | 8efa6e9 | 2008-03-31 19:41:14 -0700 | [diff] [blame] | 144 | net->core.sysctl_hdr = register_net_sysctl_table(net, |
Pavel Emelyanov | 024626e | 2007-12-08 00:09:24 -0800 | [diff] [blame] | 145 | net_core_path, tbl); |
Pavel Emelyanov | 8efa6e9 | 2008-03-31 19:41:14 -0700 | [diff] [blame] | 146 | if (net->core.sysctl_hdr == NULL) |
Pavel Emelyanov | 024626e | 2007-12-08 00:09:24 -0800 | [diff] [blame] | 147 | goto err_reg; |
| 148 | |
| 149 | return 0; |
| 150 | |
| 151 | err_reg: |
Pavel Emelyanov | d5a4502 | 2008-05-19 13:49:52 -0700 | [diff] [blame] | 152 | if (tbl != netns_core_table) |
Pavel Emelyanov | 024626e | 2007-12-08 00:09:24 -0800 | [diff] [blame] | 153 | kfree(tbl); |
| 154 | err_dup: |
| 155 | return -ENOMEM; |
| 156 | } |
| 157 | |
| 158 | static __net_exit void sysctl_core_net_exit(struct net *net) |
| 159 | { |
| 160 | struct ctl_table *tbl; |
| 161 | |
Pavel Emelyanov | 8efa6e9 | 2008-03-31 19:41:14 -0700 | [diff] [blame] | 162 | tbl = net->core.sysctl_hdr->ctl_table_arg; |
| 163 | unregister_net_sysctl_table(net->core.sysctl_hdr); |
Pavel Emelyanov | d5a4502 | 2008-05-19 13:49:52 -0700 | [diff] [blame] | 164 | BUG_ON(tbl == netns_core_table); |
Pavel Emelyanov | 024626e | 2007-12-08 00:09:24 -0800 | [diff] [blame] | 165 | kfree(tbl); |
| 166 | } |
| 167 | |
| 168 | static __net_initdata struct pernet_operations sysctl_core_ops = { |
| 169 | .init = sysctl_core_net_init, |
| 170 | .exit = sysctl_core_net_exit, |
| 171 | }; |
| 172 | |
Pavel Emelyanov | 33eb9cf | 2007-12-05 01:37:34 -0800 | [diff] [blame] | 173 | static __init int sysctl_core_init(void) |
| 174 | { |
Alexey Dobriyan | b27aead | 2008-11-25 18:00:48 -0800 | [diff] [blame] | 175 | static struct ctl_table empty[1]; |
| 176 | |
| 177 | register_sysctl_paths(net_core_path, empty); |
Pavel Emelyanov | d5a4502 | 2008-05-19 13:49:52 -0700 | [diff] [blame] | 178 | register_net_sysctl_rotable(net_core_path, net_core_table); |
Pavel Emelyanov | 024626e | 2007-12-08 00:09:24 -0800 | [diff] [blame] | 179 | return register_pernet_subsys(&sysctl_core_ops); |
Pavel Emelyanov | 33eb9cf | 2007-12-05 01:37:34 -0800 | [diff] [blame] | 180 | } |
| 181 | |
Alexey Dobriyan | b27aead | 2008-11-25 18:00:48 -0800 | [diff] [blame] | 182 | fs_initcall(sysctl_core_init); |