| /* |
| * Copyright (C) 2007 IBM Corporation |
| * |
| * Author: Cedric Le Goater <clg@fr.ibm.com> |
| * |
| * This program is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU General Public License as |
| * published by the Free Software Foundation, version 2 of the |
| * License. |
| */ |
| |
| #include <linux/nsproxy.h> |
| #include <linux/ipc_namespace.h> |
| #include <linux/sysctl.h> |
| |
| #ifdef CONFIG_PROC_SYSCTL |
| static void *get_mq(ctl_table *table) |
| { |
| char *which = table->data; |
| struct ipc_namespace *ipc_ns = current->nsproxy->ipc_ns; |
| which = (which - (char *)&init_ipc_ns) + (char *)ipc_ns; |
| return which; |
| } |
| |
| static int proc_mq_dointvec_minmax(ctl_table *table, int write, |
| void __user *buffer, size_t *lenp, loff_t *ppos) |
| { |
| struct ctl_table mq_table; |
| memcpy(&mq_table, table, sizeof(mq_table)); |
| mq_table.data = get_mq(table); |
| |
| return proc_dointvec_minmax(&mq_table, write, buffer, |
| lenp, ppos); |
| } |
| #else |
| #define proc_mq_dointvec_minmax NULL |
| #endif |
| |
| static int msg_queues_limit_min = MIN_QUEUESMAX; |
| static int msg_queues_limit_max = HARD_QUEUESMAX; |
| |
| static int msg_max_limit_min = MIN_MSGMAX; |
| static int msg_max_limit_max = HARD_MSGMAX; |
| |
| static int msg_maxsize_limit_min = MIN_MSGSIZEMAX; |
| static int msg_maxsize_limit_max = HARD_MSGSIZEMAX; |
| |
| static ctl_table mq_sysctls[] = { |
| { |
| .procname = "queues_max", |
| .data = &init_ipc_ns.mq_queues_max, |
| .maxlen = sizeof(int), |
| .mode = 0644, |
| .proc_handler = proc_mq_dointvec_minmax, |
| .extra1 = &msg_queues_limit_min, |
| .extra2 = &msg_queues_limit_max, |
| }, |
| { |
| .procname = "msg_max", |
| .data = &init_ipc_ns.mq_msg_max, |
| .maxlen = sizeof(int), |
| .mode = 0644, |
| .proc_handler = proc_mq_dointvec_minmax, |
| .extra1 = &msg_max_limit_min, |
| .extra2 = &msg_max_limit_max, |
| }, |
| { |
| .procname = "msgsize_max", |
| .data = &init_ipc_ns.mq_msgsize_max, |
| .maxlen = sizeof(int), |
| .mode = 0644, |
| .proc_handler = proc_mq_dointvec_minmax, |
| .extra1 = &msg_maxsize_limit_min, |
| .extra2 = &msg_maxsize_limit_max, |
| }, |
| {} |
| }; |
| |
| static ctl_table mq_sysctl_dir[] = { |
| { |
| .procname = "mqueue", |
| .mode = 0555, |
| .child = mq_sysctls, |
| }, |
| {} |
| }; |
| |
| static ctl_table mq_sysctl_root[] = { |
| { |
| .procname = "fs", |
| .mode = 0555, |
| .child = mq_sysctl_dir, |
| }, |
| {} |
| }; |
| |
| struct ctl_table_header *mq_register_sysctl_table(void) |
| { |
| return register_sysctl_table(mq_sysctl_root); |
| } |