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> |
Pavel Emelyanov | a37ae40 | 2007-10-23 21:13:53 -0700 | [diff] [blame] | 15 | #include <net/xfrm.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 16 | |
Pavel Emelyanov | 33eb9cf | 2007-12-05 01:37:34 -0800 | [diff] [blame] | 17 | static struct ctl_table net_core_table[] = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 18 | #ifdef CONFIG_NET |
| 19 | { |
| 20 | .ctl_name = NET_CORE_WMEM_MAX, |
| 21 | .procname = "wmem_max", |
| 22 | .data = &sysctl_wmem_max, |
| 23 | .maxlen = sizeof(int), |
| 24 | .mode = 0644, |
| 25 | .proc_handler = &proc_dointvec |
| 26 | }, |
| 27 | { |
| 28 | .ctl_name = NET_CORE_RMEM_MAX, |
| 29 | .procname = "rmem_max", |
| 30 | .data = &sysctl_rmem_max, |
| 31 | .maxlen = sizeof(int), |
| 32 | .mode = 0644, |
| 33 | .proc_handler = &proc_dointvec |
| 34 | }, |
| 35 | { |
| 36 | .ctl_name = NET_CORE_WMEM_DEFAULT, |
| 37 | .procname = "wmem_default", |
| 38 | .data = &sysctl_wmem_default, |
| 39 | .maxlen = sizeof(int), |
| 40 | .mode = 0644, |
| 41 | .proc_handler = &proc_dointvec |
| 42 | }, |
| 43 | { |
| 44 | .ctl_name = NET_CORE_RMEM_DEFAULT, |
| 45 | .procname = "rmem_default", |
| 46 | .data = &sysctl_rmem_default, |
| 47 | .maxlen = sizeof(int), |
| 48 | .mode = 0644, |
| 49 | .proc_handler = &proc_dointvec |
| 50 | }, |
| 51 | { |
| 52 | .ctl_name = NET_CORE_DEV_WEIGHT, |
| 53 | .procname = "dev_weight", |
| 54 | .data = &weight_p, |
| 55 | .maxlen = sizeof(int), |
| 56 | .mode = 0644, |
| 57 | .proc_handler = &proc_dointvec |
| 58 | }, |
| 59 | { |
| 60 | .ctl_name = NET_CORE_MAX_BACKLOG, |
| 61 | .procname = "netdev_max_backlog", |
| 62 | .data = &netdev_max_backlog, |
| 63 | .maxlen = sizeof(int), |
| 64 | .mode = 0644, |
| 65 | .proc_handler = &proc_dointvec |
| 66 | }, |
| 67 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 68 | .ctl_name = NET_CORE_MSG_COST, |
| 69 | .procname = "message_cost", |
| 70 | .data = &net_msg_cost, |
| 71 | .maxlen = sizeof(int), |
| 72 | .mode = 0644, |
| 73 | .proc_handler = &proc_dointvec_jiffies, |
| 74 | .strategy = &sysctl_jiffies, |
| 75 | }, |
| 76 | { |
| 77 | .ctl_name = NET_CORE_MSG_BURST, |
| 78 | .procname = "message_burst", |
| 79 | .data = &net_msg_burst, |
| 80 | .maxlen = sizeof(int), |
| 81 | .mode = 0644, |
| 82 | .proc_handler = &proc_dointvec, |
| 83 | }, |
| 84 | { |
| 85 | .ctl_name = NET_CORE_OPTMEM_MAX, |
| 86 | .procname = "optmem_max", |
| 87 | .data = &sysctl_optmem_max, |
| 88 | .maxlen = sizeof(int), |
| 89 | .mode = 0644, |
| 90 | .proc_handler = &proc_dointvec |
| 91 | }, |
Jamal Hadi Salim | f8cd548 | 2006-03-20 19:15:11 -0800 | [diff] [blame] | 92 | #ifdef CONFIG_XFRM |
| 93 | { |
| 94 | .ctl_name = NET_CORE_AEVENT_ETIME, |
| 95 | .procname = "xfrm_aevent_etime", |
| 96 | .data = &sysctl_xfrm_aevent_etime, |
| 97 | .maxlen = sizeof(u32), |
| 98 | .mode = 0644, |
| 99 | .proc_handler = &proc_dointvec |
| 100 | }, |
| 101 | { |
| 102 | .ctl_name = NET_CORE_AEVENT_RSEQTH, |
| 103 | .procname = "xfrm_aevent_rseqth", |
| 104 | .data = &sysctl_xfrm_aevent_rseqth, |
| 105 | .maxlen = sizeof(u32), |
| 106 | .mode = 0644, |
| 107 | .proc_handler = &proc_dointvec |
| 108 | }, |
David S. Miller | 14e50e5 | 2007-05-24 18:17:54 -0700 | [diff] [blame] | 109 | { |
| 110 | .ctl_name = CTL_UNNUMBERED, |
| 111 | .procname = "xfrm_larval_drop", |
| 112 | .data = &sysctl_xfrm_larval_drop, |
| 113 | .maxlen = sizeof(int), |
| 114 | .mode = 0644, |
| 115 | .proc_handler = &proc_dointvec |
| 116 | }, |
David S. Miller | 01e67d0 | 2007-05-25 00:41:38 -0700 | [diff] [blame] | 117 | { |
| 118 | .ctl_name = CTL_UNNUMBERED, |
| 119 | .procname = "xfrm_acq_expires", |
| 120 | .data = &sysctl_xfrm_acq_expires, |
| 121 | .maxlen = sizeof(int), |
| 122 | .mode = 0644, |
| 123 | .proc_handler = &proc_dointvec |
| 124 | }, |
Jamal Hadi Salim | f8cd548 | 2006-03-20 19:15:11 -0800 | [diff] [blame] | 125 | #endif /* CONFIG_XFRM */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 126 | #endif /* CONFIG_NET */ |
| 127 | { |
| 128 | .ctl_name = NET_CORE_SOMAXCONN, |
| 129 | .procname = "somaxconn", |
Pavel Emelyanov | 8efa6e9 | 2008-03-31 19:41:14 -0700 | [diff] [blame] | 130 | .data = &init_net.core.sysctl_somaxconn, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 131 | .maxlen = sizeof(int), |
| 132 | .mode = 0644, |
| 133 | .proc_handler = &proc_dointvec |
| 134 | }, |
Stephen Hemminger | 51b0bde | 2005-06-23 20:14:40 -0700 | [diff] [blame] | 135 | { |
| 136 | .ctl_name = NET_CORE_BUDGET, |
| 137 | .procname = "netdev_budget", |
| 138 | .data = &netdev_budget, |
| 139 | .maxlen = sizeof(int), |
| 140 | .mode = 0644, |
| 141 | .proc_handler = &proc_dointvec |
| 142 | }, |
Stephen Hemminger | a2a316f | 2007-03-08 20:41:08 -0800 | [diff] [blame] | 143 | { |
| 144 | .ctl_name = NET_CORE_WARNINGS, |
| 145 | .procname = "warnings", |
| 146 | .data = &net_msg_warn, |
| 147 | .maxlen = sizeof(int), |
| 148 | .mode = 0644, |
| 149 | .proc_handler = &proc_dointvec |
| 150 | }, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 151 | { .ctl_name = 0 } |
| 152 | }; |
Pavel Emelyanov | 33eb9cf | 2007-12-05 01:37:34 -0800 | [diff] [blame] | 153 | |
Pavel Emelyanov | 024626e | 2007-12-08 00:09:24 -0800 | [diff] [blame] | 154 | static __net_initdata struct ctl_path net_core_path[] = { |
Pavel Emelyanov | 33eb9cf | 2007-12-05 01:37:34 -0800 | [diff] [blame] | 155 | { .procname = "net", .ctl_name = CTL_NET, }, |
| 156 | { .procname = "core", .ctl_name = NET_CORE, }, |
| 157 | { }, |
| 158 | }; |
| 159 | |
Pavel Emelyanov | 024626e | 2007-12-08 00:09:24 -0800 | [diff] [blame] | 160 | static __net_init int sysctl_core_net_init(struct net *net) |
| 161 | { |
| 162 | struct ctl_table *tbl, *tmp; |
| 163 | |
Pavel Emelyanov | 8efa6e9 | 2008-03-31 19:41:14 -0700 | [diff] [blame] | 164 | net->core.sysctl_somaxconn = SOMAXCONN; |
Pavel Emelyanov | b8e1f9b | 2007-12-08 00:12:33 -0800 | [diff] [blame] | 165 | |
Pavel Emelyanov | 024626e | 2007-12-08 00:09:24 -0800 | [diff] [blame] | 166 | tbl = net_core_table; |
| 167 | if (net != &init_net) { |
| 168 | tbl = kmemdup(tbl, sizeof(net_core_table), GFP_KERNEL); |
| 169 | if (tbl == NULL) |
| 170 | goto err_dup; |
| 171 | |
Pavel Emelyanov | 790a353 | 2007-12-08 00:11:51 -0800 | [diff] [blame] | 172 | for (tmp = tbl; tmp->procname; tmp++) { |
| 173 | if (tmp->data >= (void *)&init_net && |
| 174 | tmp->data < (void *)(&init_net + 1)) |
| 175 | tmp->data += (char *)net - (char *)&init_net; |
| 176 | else |
| 177 | tmp->mode &= ~0222; |
| 178 | } |
Pavel Emelyanov | 024626e | 2007-12-08 00:09:24 -0800 | [diff] [blame] | 179 | } |
| 180 | |
Pavel Emelyanov | 8efa6e9 | 2008-03-31 19:41:14 -0700 | [diff] [blame] | 181 | net->core.sysctl_hdr = register_net_sysctl_table(net, |
Pavel Emelyanov | 024626e | 2007-12-08 00:09:24 -0800 | [diff] [blame] | 182 | net_core_path, tbl); |
Pavel Emelyanov | 8efa6e9 | 2008-03-31 19:41:14 -0700 | [diff] [blame] | 183 | if (net->core.sysctl_hdr == NULL) |
Pavel Emelyanov | 024626e | 2007-12-08 00:09:24 -0800 | [diff] [blame] | 184 | goto err_reg; |
| 185 | |
| 186 | return 0; |
| 187 | |
| 188 | err_reg: |
| 189 | if (tbl != net_core_table) |
| 190 | kfree(tbl); |
| 191 | err_dup: |
| 192 | return -ENOMEM; |
| 193 | } |
| 194 | |
| 195 | static __net_exit void sysctl_core_net_exit(struct net *net) |
| 196 | { |
| 197 | struct ctl_table *tbl; |
| 198 | |
Pavel Emelyanov | 8efa6e9 | 2008-03-31 19:41:14 -0700 | [diff] [blame] | 199 | tbl = net->core.sysctl_hdr->ctl_table_arg; |
| 200 | unregister_net_sysctl_table(net->core.sysctl_hdr); |
Pavel Emelyanov | 024626e | 2007-12-08 00:09:24 -0800 | [diff] [blame] | 201 | BUG_ON(tbl == net_core_table); |
| 202 | kfree(tbl); |
| 203 | } |
| 204 | |
| 205 | static __net_initdata struct pernet_operations sysctl_core_ops = { |
| 206 | .init = sysctl_core_net_init, |
| 207 | .exit = sysctl_core_net_exit, |
| 208 | }; |
| 209 | |
Pavel Emelyanov | 33eb9cf | 2007-12-05 01:37:34 -0800 | [diff] [blame] | 210 | static __init int sysctl_core_init(void) |
| 211 | { |
Pavel Emelyanov | 024626e | 2007-12-08 00:09:24 -0800 | [diff] [blame] | 212 | return register_pernet_subsys(&sysctl_core_ops); |
Pavel Emelyanov | 33eb9cf | 2007-12-05 01:37:34 -0800 | [diff] [blame] | 213 | } |
| 214 | |
| 215 | __initcall(sysctl_core_init); |