From 9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00 Mon Sep 17 00:00:00 2001 From: Yunhong Jiang Date: Tue, 4 Aug 2015 12:17:53 -0700 Subject: Add the rt linux 4.1.3-rt3 as base Import the rt linux 4.1.3-rt3 as OPNFV kvm base. It's from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt and the base is: commit 0917f823c59692d751951bf5ea699a2d1e2f26a2 Author: Sebastian Andrzej Siewior Date: Sat Jul 25 12:13:34 2015 +0200 Prepare v4.1.3-rt3 Signed-off-by: Sebastian Andrzej Siewior We lose all the git history this way and it's not good. We should apply another opnfv project repo in future. Change-Id: I87543d81c9df70d99c5001fbdf646b202c19f423 Signed-off-by: Yunhong Jiang --- kernel/ipc/ipc_sysctl.c | 224 ++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 224 insertions(+) create mode 100644 kernel/ipc/ipc_sysctl.c (limited to 'kernel/ipc/ipc_sysctl.c') diff --git a/kernel/ipc/ipc_sysctl.c b/kernel/ipc/ipc_sysctl.c new file mode 100644 index 000000000..8ad93c29f --- /dev/null +++ b/kernel/ipc/ipc_sysctl.c @@ -0,0 +1,224 @@ +/* + * Copyright (C) 2007 + * + * Author: Eric Biederman + * + * 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 +#include +#include +#include +#include +#include +#include +#include "util.h" + +static void *get_ipc(struct 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; +} + +#ifdef CONFIG_PROC_SYSCTL +static int proc_ipc_dointvec(struct ctl_table *table, int write, + void __user *buffer, size_t *lenp, loff_t *ppos) +{ + struct ctl_table ipc_table; + + memcpy(&ipc_table, table, sizeof(ipc_table)); + ipc_table.data = get_ipc(table); + + return proc_dointvec(&ipc_table, write, buffer, lenp, ppos); +} + +static int proc_ipc_dointvec_minmax(struct ctl_table *table, int write, + void __user *buffer, size_t *lenp, loff_t *ppos) +{ + struct ctl_table ipc_table; + + memcpy(&ipc_table, table, sizeof(ipc_table)); + ipc_table.data = get_ipc(table); + + return proc_dointvec_minmax(&ipc_table, write, buffer, lenp, ppos); +} + +static int proc_ipc_dointvec_minmax_orphans(struct ctl_table *table, int write, + void __user *buffer, size_t *lenp, loff_t *ppos) +{ + struct ipc_namespace *ns = current->nsproxy->ipc_ns; + int err = proc_ipc_dointvec_minmax(table, write, buffer, lenp, ppos); + + if (err < 0) + return err; + if (ns->shm_rmid_forced) + shm_destroy_orphaned(ns); + return err; +} + +static int proc_ipc_doulongvec_minmax(struct ctl_table *table, int write, + void __user *buffer, size_t *lenp, loff_t *ppos) +{ + struct ctl_table ipc_table; + memcpy(&ipc_table, table, sizeof(ipc_table)); + ipc_table.data = get_ipc(table); + + return proc_doulongvec_minmax(&ipc_table, write, buffer, + lenp, ppos); +} + +static int proc_ipc_auto_msgmni(struct ctl_table *table, int write, + void __user *buffer, size_t *lenp, loff_t *ppos) +{ + struct ctl_table ipc_table; + int dummy = 0; + + memcpy(&ipc_table, table, sizeof(ipc_table)); + ipc_table.data = &dummy; + + if (write) + pr_info_once("writing to auto_msgmni has no effect"); + + return proc_dointvec_minmax(&ipc_table, write, buffer, lenp, ppos); +} + +#else +#define proc_ipc_doulongvec_minmax NULL +#define proc_ipc_dointvec NULL +#define proc_ipc_dointvec_minmax NULL +#define proc_ipc_dointvec_minmax_orphans NULL +#define proc_ipc_auto_msgmni NULL +#endif + +static int zero; +static int one = 1; +static int int_max = INT_MAX; + +static struct ctl_table ipc_kern_table[] = { + { + .procname = "shmmax", + .data = &init_ipc_ns.shm_ctlmax, + .maxlen = sizeof(init_ipc_ns.shm_ctlmax), + .mode = 0644, + .proc_handler = proc_ipc_doulongvec_minmax, + }, + { + .procname = "shmall", + .data = &init_ipc_ns.shm_ctlall, + .maxlen = sizeof(init_ipc_ns.shm_ctlall), + .mode = 0644, + .proc_handler = proc_ipc_doulongvec_minmax, + }, + { + .procname = "shmmni", + .data = &init_ipc_ns.shm_ctlmni, + .maxlen = sizeof(init_ipc_ns.shm_ctlmni), + .mode = 0644, + .proc_handler = proc_ipc_dointvec, + }, + { + .procname = "shm_rmid_forced", + .data = &init_ipc_ns.shm_rmid_forced, + .maxlen = sizeof(init_ipc_ns.shm_rmid_forced), + .mode = 0644, + .proc_handler = proc_ipc_dointvec_minmax_orphans, + .extra1 = &zero, + .extra2 = &one, + }, + { + .procname = "msgmax", + .data = &init_ipc_ns.msg_ctlmax, + .maxlen = sizeof(init_ipc_ns.msg_ctlmax), + .mode = 0644, + .proc_handler = proc_ipc_dointvec_minmax, + .extra1 = &zero, + .extra2 = &int_max, + }, + { + .procname = "msgmni", + .data = &init_ipc_ns.msg_ctlmni, + .maxlen = sizeof(init_ipc_ns.msg_ctlmni), + .mode = 0644, + .proc_handler = proc_ipc_dointvec_minmax, + .extra1 = &zero, + .extra2 = &int_max, + }, + { + .procname = "auto_msgmni", + .data = NULL, + .maxlen = sizeof(int), + .mode = 0644, + .proc_handler = proc_ipc_auto_msgmni, + .extra1 = &zero, + .extra2 = &one, + }, + { + .procname = "msgmnb", + .data = &init_ipc_ns.msg_ctlmnb, + .maxlen = sizeof(init_ipc_ns.msg_ctlmnb), + .mode = 0644, + .proc_handler = proc_ipc_dointvec_minmax, + .extra1 = &zero, + .extra2 = &int_max, + }, + { + .procname = "sem", + .data = &init_ipc_ns.sem_ctls, + .maxlen = 4*sizeof(int), + .mode = 0644, + .proc_handler = proc_ipc_dointvec, + }, +#ifdef CONFIG_CHECKPOINT_RESTORE + { + .procname = "sem_next_id", + .data = &init_ipc_ns.ids[IPC_SEM_IDS].next_id, + .maxlen = sizeof(init_ipc_ns.ids[IPC_SEM_IDS].next_id), + .mode = 0644, + .proc_handler = proc_ipc_dointvec_minmax, + .extra1 = &zero, + .extra2 = &int_max, + }, + { + .procname = "msg_next_id", + .data = &init_ipc_ns.ids[IPC_MSG_IDS].next_id, + .maxlen = sizeof(init_ipc_ns.ids[IPC_MSG_IDS].next_id), + .mode = 0644, + .proc_handler = proc_ipc_dointvec_minmax, + .extra1 = &zero, + .extra2 = &int_max, + }, + { + .procname = "shm_next_id", + .data = &init_ipc_ns.ids[IPC_SHM_IDS].next_id, + .maxlen = sizeof(init_ipc_ns.ids[IPC_SHM_IDS].next_id), + .mode = 0644, + .proc_handler = proc_ipc_dointvec_minmax, + .extra1 = &zero, + .extra2 = &int_max, + }, +#endif + {} +}; + +static struct ctl_table ipc_root_table[] = { + { + .procname = "kernel", + .mode = 0555, + .child = ipc_kern_table, + }, + {} +}; + +static int __init ipc_sysctl_init(void) +{ + register_sysctl_table(ipc_root_table); + return 0; +} + +device_initcall(ipc_sysctl_init); -- cgit 1.2.3-korg