diff options
Diffstat (limited to 'ANDROID_3.4.5/ipc/ipc_sysctl.c')
| -rw-r--r-- | ANDROID_3.4.5/ipc/ipc_sysctl.c | 248 |
1 files changed, 0 insertions, 248 deletions
diff --git a/ANDROID_3.4.5/ipc/ipc_sysctl.c b/ANDROID_3.4.5/ipc/ipc_sysctl.c deleted file mode 100644 index 00fba2ba..00000000 --- a/ANDROID_3.4.5/ipc/ipc_sysctl.c +++ /dev/null @@ -1,248 +0,0 @@ -/* - * Copyright (C) 2007 - * - * Author: Eric Biederman <ebiederm@xmision.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/module.h> -#include <linux/ipc.h> -#include <linux/nsproxy.h> -#include <linux/sysctl.h> -#include <linux/uaccess.h> -#include <linux/ipc_namespace.h> -#include <linux/msg.h> -#include "util.h" - -static void *get_ipc(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(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(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(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_callback_dointvec(ctl_table *table, int write, - void __user *buffer, size_t *lenp, loff_t *ppos) -{ - struct ctl_table ipc_table; - size_t lenp_bef = *lenp; - int rc; - - memcpy(&ipc_table, table, sizeof(ipc_table)); - ipc_table.data = get_ipc(table); - - rc = proc_dointvec(&ipc_table, write, buffer, lenp, ppos); - - if (write && !rc && lenp_bef == *lenp) - /* - * Tunable has successfully been changed by hand. Disable its - * automatic adjustment. This simply requires unregistering - * the notifiers that trigger recalculation. - */ - unregister_ipcns_notifier(current->nsproxy->ipc_ns); - - return rc; -} - -static int proc_ipc_doulongvec_minmax(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); -} - -/* - * Routine that is called when the file "auto_msgmni" has successfully been - * written. - * Two values are allowed: - * 0: unregister msgmni's callback routine from the ipc namespace notifier - * chain. This means that msgmni won't be recomputed anymore upon memory - * add/remove or ipc namespace creation/removal. - * 1: register back the callback routine. - */ -static void ipc_auto_callback(int val) -{ - if (!val) - unregister_ipcns_notifier(current->nsproxy->ipc_ns); - else { - /* - * Re-enable automatic recomputing only if not already - * enabled. - */ - recompute_msgmni(current->nsproxy->ipc_ns); - cond_register_ipcns_notifier(current->nsproxy->ipc_ns); - } -} - -static int proc_ipcauto_dointvec_minmax(ctl_table *table, int write, - void __user *buffer, size_t *lenp, loff_t *ppos) -{ - struct ctl_table ipc_table; - size_t lenp_bef = *lenp; - int oldval; - int rc; - - memcpy(&ipc_table, table, sizeof(ipc_table)); - ipc_table.data = get_ipc(table); - oldval = *((int *)(ipc_table.data)); - - rc = proc_dointvec_minmax(&ipc_table, write, buffer, lenp, ppos); - - if (write && !rc && lenp_bef == *lenp) { - int newval = *((int *)(ipc_table.data)); - /* - * The file "auto_msgmni" has correctly been set. - * React by (un)registering the corresponding tunable, if the - * value has changed. - */ - if (newval != oldval) - ipc_auto_callback(newval); - } - - return rc; -} - -#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_callback_dointvec NULL -#define proc_ipcauto_dointvec_minmax NULL -#endif - -static int zero; -static int one = 1; - -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, - }, - { - .procname = "msgmni", - .data = &init_ipc_ns.msg_ctlmni, - .maxlen = sizeof (init_ipc_ns.msg_ctlmni), - .mode = 0644, - .proc_handler = proc_ipc_callback_dointvec, - }, - { - .procname = "msgmnb", - .data = &init_ipc_ns.msg_ctlmnb, - .maxlen = sizeof (init_ipc_ns.msg_ctlmnb), - .mode = 0644, - .proc_handler = proc_ipc_dointvec, - }, - { - .procname = "sem", - .data = &init_ipc_ns.sem_ctls, - .maxlen = 4*sizeof (int), - .mode = 0644, - .proc_handler = proc_ipc_dointvec, - }, - { - .procname = "auto_msgmni", - .data = &init_ipc_ns.auto_msgmni, - .maxlen = sizeof(int), - .mode = 0644, - .proc_handler = proc_ipcauto_dointvec_minmax, - .extra1 = &zero, - .extra2 = &one, - }, - {} -}; - -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; -} - -__initcall(ipc_sysctl_init); |