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![Cedric Le Goater](/assets/img/avatar_default.png)
Finish the work : kill all #ifdef CONFIG_IPC_NS. Thanks Robert ! Signed-off-by: Cedric Le Goater <clg@fr.ibm.com> Cc: Eric Biederman <ebiederm@xmision.com> Cc: Robert P. J. Day <rpjday@mindspring.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
179 lines
4.1 KiB
C
179 lines
4.1 KiB
C
/*
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* Copyright (C) 2007
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*
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* Author: Eric Biederman <ebiederm@xmision.com>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation, version 2 of the
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* License.
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*/
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#include <linux/module.h>
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#include <linux/ipc.h>
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#include <linux/nsproxy.h>
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#include <linux/sysctl.h>
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#include <linux/uaccess.h>
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static void *get_ipc(ctl_table *table)
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{
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char *which = table->data;
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struct ipc_namespace *ipc_ns = current->nsproxy->ipc_ns;
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which = (which - (char *)&init_ipc_ns) + (char *)ipc_ns;
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return which;
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}
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#ifdef CONFIG_PROC_FS
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static int proc_ipc_dointvec(ctl_table *table, int write, struct file *filp,
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void __user *buffer, size_t *lenp, loff_t *ppos)
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{
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struct ctl_table ipc_table;
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memcpy(&ipc_table, table, sizeof(ipc_table));
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ipc_table.data = get_ipc(table);
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return proc_dointvec(&ipc_table, write, filp, buffer, lenp, ppos);
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}
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static int proc_ipc_doulongvec_minmax(ctl_table *table, int write,
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struct file *filp, void __user *buffer, size_t *lenp, loff_t *ppos)
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{
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struct ctl_table ipc_table;
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memcpy(&ipc_table, table, sizeof(ipc_table));
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ipc_table.data = get_ipc(table);
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return proc_doulongvec_minmax(&ipc_table, write, filp, buffer,
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lenp, ppos);
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}
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#else
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#define proc_ipc_doulongvec_minmax NULL
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#define proc_ipc_dointvec NULL
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#endif
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#ifdef CONFIG_SYSCTL_SYSCALL
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/* The generic sysctl ipc data routine. */
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static int sysctl_ipc_data(ctl_table *table, int __user *name, int nlen,
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void __user *oldval, size_t __user *oldlenp,
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void __user *newval, size_t newlen)
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{
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size_t len;
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void *data;
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/* Get out of I don't have a variable */
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if (!table->data || !table->maxlen)
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return -ENOTDIR;
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data = get_ipc(table);
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if (!data)
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return -ENOTDIR;
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if (oldval && oldlenp) {
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if (get_user(len, oldlenp))
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return -EFAULT;
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if (len) {
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if (len > table->maxlen)
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len = table->maxlen;
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if (copy_to_user(oldval, data, len))
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return -EFAULT;
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if (put_user(len, oldlenp))
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return -EFAULT;
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}
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}
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if (newval && newlen) {
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if (newlen > table->maxlen)
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newlen = table->maxlen;
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if (copy_from_user(data, newval, newlen))
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return -EFAULT;
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}
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return 1;
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}
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#else
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#define sysctl_ipc_data NULL
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#endif
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static struct ctl_table ipc_kern_table[] = {
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{
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.ctl_name = KERN_SHMMAX,
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.procname = "shmmax",
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.data = &init_ipc_ns.shm_ctlmax,
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.maxlen = sizeof (init_ipc_ns.shm_ctlmax),
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.mode = 0644,
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.proc_handler = proc_ipc_doulongvec_minmax,
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.strategy = sysctl_ipc_data,
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},
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{
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.ctl_name = KERN_SHMALL,
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.procname = "shmall",
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.data = &init_ipc_ns.shm_ctlall,
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.maxlen = sizeof (init_ipc_ns.shm_ctlall),
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.mode = 0644,
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.proc_handler = proc_ipc_doulongvec_minmax,
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.strategy = sysctl_ipc_data,
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},
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{
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.ctl_name = KERN_SHMMNI,
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.procname = "shmmni",
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.data = &init_ipc_ns.shm_ctlmni,
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.maxlen = sizeof (init_ipc_ns.shm_ctlmni),
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.mode = 0644,
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.proc_handler = proc_ipc_dointvec,
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.strategy = sysctl_ipc_data,
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},
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{
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.ctl_name = KERN_MSGMAX,
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.procname = "msgmax",
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.data = &init_ipc_ns.msg_ctlmax,
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.maxlen = sizeof (init_ipc_ns.msg_ctlmax),
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.mode = 0644,
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.proc_handler = proc_ipc_dointvec,
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.strategy = sysctl_ipc_data,
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},
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{
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.ctl_name = KERN_MSGMNI,
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.procname = "msgmni",
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.data = &init_ipc_ns.msg_ctlmni,
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.maxlen = sizeof (init_ipc_ns.msg_ctlmni),
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.mode = 0644,
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.proc_handler = proc_ipc_dointvec,
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.strategy = sysctl_ipc_data,
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},
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{
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.ctl_name = KERN_MSGMNB,
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.procname = "msgmnb",
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.data = &init_ipc_ns.msg_ctlmnb,
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.maxlen = sizeof (init_ipc_ns.msg_ctlmnb),
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.mode = 0644,
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.proc_handler = proc_ipc_dointvec,
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.strategy = sysctl_ipc_data,
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},
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{
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.ctl_name = KERN_SEM,
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.procname = "sem",
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.data = &init_ipc_ns.sem_ctls,
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.maxlen = 4*sizeof (int),
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.mode = 0644,
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.proc_handler = proc_ipc_dointvec,
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.strategy = sysctl_ipc_data,
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},
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{}
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};
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static struct ctl_table ipc_root_table[] = {
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{
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.ctl_name = CTL_KERN,
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.procname = "kernel",
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.mode = 0555,
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.child = ipc_kern_table,
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},
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{}
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};
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static int __init ipc_sysctl_init(void)
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{
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register_sysctl_table(ipc_root_table);
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return 0;
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}
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__initcall(ipc_sysctl_init);
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