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ipc/mq_sysctl.c
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/* * 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> |
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#ifdef CONFIG_PROC_SYSCTL |
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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; } |
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static int proc_mq_dointvec_minmax(ctl_table *table, int write, |
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void __user *buffer, size_t *lenp, loff_t *ppos) |
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{ struct ctl_table mq_table; memcpy(&mq_table, table, sizeof(mq_table)); mq_table.data = get_mq(table); |
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return proc_dointvec_minmax(&mq_table, write, buffer, |
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lenp, ppos); } #else |
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#define proc_mq_dointvec_minmax NULL #endif |
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static int msg_queues_limit_min = MIN_QUEUESMAX; static int msg_queues_limit_max = HARD_QUEUESMAX; |
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static int msg_max_limit_min = MIN_MSGMAX; |
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static int msg_max_limit_max = HARD_MSGMAX; |
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static int msg_maxsize_limit_min = MIN_MSGSIZEMAX; |
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static int msg_maxsize_limit_max = HARD_MSGSIZEMAX; |
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static ctl_table mq_sysctls[] = { { .procname = "queues_max", .data = &init_ipc_ns.mq_queues_max, .maxlen = sizeof(int), .mode = 0644, |
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.proc_handler = proc_mq_dointvec_minmax, .extra1 = &msg_queues_limit_min, .extra2 = &msg_queues_limit_max, |
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}, { .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, }, |
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{ .procname = "msg_default", .data = &init_ipc_ns.mq_msg_default, .maxlen = sizeof(int), .mode = 0644, .proc_handler = proc_mq_dointvec_minmax, .extra1 = &msg_max_limit_min, .extra2 = &msg_max_limit_max, }, { .procname = "msgsize_default", .data = &init_ipc_ns.mq_msgsize_default, .maxlen = sizeof(int), .mode = 0644, .proc_handler = proc_mq_dointvec_minmax, .extra1 = &msg_maxsize_limit_min, .extra2 = &msg_maxsize_limit_max, }, |
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{} |
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}; static ctl_table mq_sysctl_dir[] = { { .procname = "mqueue", .mode = 0555, .child = mq_sysctls, }, |
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{} |
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}; static ctl_table mq_sysctl_root[] = { { |
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.procname = "fs", .mode = 0555, .child = mq_sysctl_dir, }, |
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{} |
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}; struct ctl_table_header *mq_register_sysctl_table(void) { return register_sysctl_table(mq_sysctl_root); } |