Merge ../linus

8 files changed, 649 insertions, 295 deletions

diff --git a/ipc/compat.c b/ipc/compat.c
index 4d20cfd38f0..fa18141539f 100644
--- a/ipc/compat.c
+++ b/ipc/compat.c
@@ -115,7 +115,6 @@ struct compat_shm_info {
 
 extern int sem_ctls[];
 #define sc_semopm	(sem_ctls[2])
-#define MAXBUF (64*1024)
 
 static inline int compat_ipc_parse_version(int *cmd)
 {
@@ -307,35 +306,30 @@ long compat_sys_semctl(int first, int second, int third, void __user *uptr)
 
 long compat_sys_msgsnd(int first, int second, int third, void __user *uptr)
 {
-	struct msgbuf __user *p;
 	struct compat_msgbuf __user *up = uptr;
 	long type;
 
 	if (first < 0)
 		return -EINVAL;
-	if (second < 0 || (second >= MAXBUF - sizeof(struct msgbuf)))
+	if (second < 0)
 		return -EINVAL;
 
-	p = compat_alloc_user_space(second + sizeof(struct msgbuf));
-	if (get_user(type, &up->mtype) ||
-	    put_user(type, &p->mtype) ||
-	    copy_in_user(p->mtext, up->mtext, second))
+	if (get_user(type, &up->mtype))
 		return -EFAULT;
 
-	return sys_msgsnd(first, p, second, third);
+	return do_msgsnd(first, type, up->mtext, second, third);
 }
 
 long compat_sys_msgrcv(int first, int second, int msgtyp, int third,
 			   int version, void __user *uptr)
 {
-	struct msgbuf __user *p;
 	struct compat_msgbuf __user *up;
 	long type;
 	int err;
 
 	if (first < 0)
 		return -EINVAL;
-	if (second < 0 || (second >= MAXBUF - sizeof(struct msgbuf)))
+	if (second < 0)
 		return -EINVAL;
 
 	if (!version) {
@@ -349,14 +343,11 @@ long compat_sys_msgrcv(int first, int second, int msgtyp, int third,
 		uptr = compat_ptr(ipck.msgp);
 		msgtyp = ipck.msgtyp;
 	}
-	p = compat_alloc_user_space(second + sizeof(struct msgbuf));
-	err = sys_msgrcv(first, p, second, msgtyp, third);
+	up = uptr;
+	err = do_msgrcv(first, &type, up->mtext, second, msgtyp, third);
 	if (err < 0)
 		goto out;
-	up = uptr;
-	if (get_user(type, &p->mtype) ||
-	    put_user(type, &up->mtype) ||
-	    copy_in_user(up->mtext, p->mtext, err))
+	if (put_user(type, &up->mtype))
 		err = -EFAULT;
 out:
 	return err;
diff --git a/ipc/mqueue.c b/ipc/mqueue.c
index 02e6f679897..02717f71d8d 100644
--- a/ipc/mqueue.c
+++ b/ipc/mqueue.c
@@ -2,7 +2,7 @@
  * POSIX message queues filesystem for Linux.
  *
  * Copyright (C) 2003,2004  Krzysztof Benedyczak    (golbi@mat.uni.torun.pl)
- *                          Michal Wronski          (Michal.Wronski@motorola.com)
+ *                          Michal Wronski          (michal.wronski@gmail.com)
  *
  * Spinlocks:               Mohamed Abbas           (abbas.mohamed@intel.com)
  * Lockless receive & send, fd based notify:
@@ -73,7 +73,7 @@ struct mqueue_inode_info {
 	struct mq_attr attr;
 
 	struct sigevent notify;
-	pid_t notify_owner;
+	struct pid* notify_owner;
 	struct user_struct *user;	/* user who created, for accounting */
 	struct sock *notify_sock;
 	struct sk_buff *notify_cookie;
@@ -90,7 +90,7 @@ static struct super_operations mqueue_super_ops;
 static void remove_notification(struct mqueue_inode_info *info);
 
 static spinlock_t mq_lock;
-static kmem_cache_t *mqueue_inode_cachep;
+static struct kmem_cache *mqueue_inode_cachep;
 static struct vfsmount *mqueue_mnt;
 
 static unsigned int queues_count;
@@ -115,7 +115,6 @@ static struct inode *mqueue_get_inode(struct super_block *sb, int mode,
 		inode->i_mode = mode;
 		inode->i_uid = current->fsuid;
 		inode->i_gid = current->fsgid;
-		inode->i_blksize = PAGE_CACHE_SIZE;
 		inode->i_blocks = 0;
 		inode->i_mtime = inode->i_ctime = inode->i_atime =
 				CURRENT_TIME;
@@ -135,7 +134,7 @@ static struct inode *mqueue_get_inode(struct super_block *sb, int mode,
 			INIT_LIST_HEAD(&info->e_wait_q[0].list);
 			INIT_LIST_HEAD(&info->e_wait_q[1].list);
 			info->messages = NULL;
-			info->notify_owner = 0;
+			info->notify_owner = NULL;
 			info->qsize = 0;
 			info->user = NULL;	/* set when all is ok */
 			memset(&info->attr, 0, sizeof(info->attr));
@@ -169,7 +168,7 @@ static struct inode *mqueue_get_inode(struct super_block *sb, int mode,
 			/* all is ok */
 			info->user = get_uid(u);
 		} else if (S_ISDIR(mode)) {
-			inode->i_nlink++;
+			inc_nlink(inode);
 			/* Some things misbehave if size == 0 on a directory */
 			inode->i_size = 2 * DIRENT_SIZE;
 			inode->i_op = &mqueue_dir_inode_operations;
@@ -212,7 +211,7 @@ static int mqueue_get_sb(struct file_system_type *fs_type,
 	return get_sb_single(fs_type, flags, data, mqueue_fill_super, mnt);
 }
 
-static void init_once(void *foo, kmem_cache_t * cachep, unsigned long flags)
+static void init_once(void *foo, struct kmem_cache * cachep, unsigned long flags)
 {
 	struct mqueue_inode_info *p = (struct mqueue_inode_info *) foo;
 
@@ -225,7 +224,7 @@ static struct inode *mqueue_alloc_inode(struct super_block *sb)
 {
 	struct mqueue_inode_info *ei;
 
-	ei = kmem_cache_alloc(mqueue_inode_cachep, SLAB_KERNEL);
+	ei = kmem_cache_alloc(mqueue_inode_cachep, GFP_KERNEL);
 	if (!ei)
 		return NULL;
 	return &ei->vfs_inode;
@@ -308,7 +307,7 @@ static int mqueue_unlink(struct inode *dir, struct dentry *dentry)
 
 	dir->i_ctime = dir->i_mtime = dir->i_atime = CURRENT_TIME;
 	dir->i_size -= DIRENT_SIZE;
-  	inode->i_nlink--;
+  	drop_nlink(inode);
   	dput(dentry);
   	return 0;
 }
@@ -323,7 +322,7 @@ static int mqueue_unlink(struct inode *dir, struct dentry *dentry)
 static ssize_t mqueue_read_file(struct file *filp, char __user *u_data,
 				size_t count, loff_t * off)
 {
-	struct mqueue_inode_info *info = MQUEUE_I(filp->f_dentry->d_inode);
+	struct mqueue_inode_info *info = MQUEUE_I(filp->f_path.dentry->d_inode);
 	char buffer[FILENT_SIZE];
 	size_t slen;
 	loff_t o;
@@ -339,7 +338,7 @@ static ssize_t mqueue_read_file(struct file *filp, char __user *u_data,
 			(info->notify_owner &&
 			 info->notify.sigev_notify == SIGEV_SIGNAL) ?
 				info->notify.sigev_signo : 0,
-			info->notify_owner);
+			pid_nr(info->notify_owner));
 	spin_unlock(&info->lock);
 	buffer[sizeof(buffer)-1] = '\0';
 	slen = strlen(buffer)+1;
@@ -355,16 +354,16 @@ static ssize_t mqueue_read_file(struct file *filp, char __user *u_data,
 		return -EFAULT;
 
 	*off = o + count;
-	filp->f_dentry->d_inode->i_atime = filp->f_dentry->d_inode->i_ctime = CURRENT_TIME;
+	filp->f_path.dentry->d_inode->i_atime = filp->f_path.dentry->d_inode->i_ctime = CURRENT_TIME;
 	return count;
 }
 
 static int mqueue_flush_file(struct file *filp, fl_owner_t id)
 {
-	struct mqueue_inode_info *info = MQUEUE_I(filp->f_dentry->d_inode);
+	struct mqueue_inode_info *info = MQUEUE_I(filp->f_path.dentry->d_inode);
 
 	spin_lock(&info->lock);
-	if (current->tgid == info->notify_owner)
+	if (task_tgid(current) == info->notify_owner)
 		remove_notification(info);
 
 	spin_unlock(&info->lock);
@@ -373,7 +372,7 @@ static int mqueue_flush_file(struct file *filp, fl_owner_t id)
 
 static unsigned int mqueue_poll_file(struct file *filp, struct poll_table_struct *poll_tab)
 {
-	struct mqueue_inode_info *info = MQUEUE_I(filp->f_dentry->d_inode);
+	struct mqueue_inode_info *info = MQUEUE_I(filp->f_path.dentry->d_inode);
 	int retval = 0;
 
 	poll_wait(filp, &info->wait_q, poll_tab);
@@ -519,8 +518,8 @@ static void __do_notify(struct mqueue_inode_info *info)
 			sig_i.si_pid = current->tgid;
 			sig_i.si_uid = current->uid;
 
-			kill_proc_info(info->notify.sigev_signo,
-				       &sig_i, info->notify_owner);
+			kill_pid_info(info->notify.sigev_signo,
+				      &sig_i, info->notify_owner);
 			break;
 		case SIGEV_THREAD:
 			set_cookie(info->notify_cookie, NOTIFY_WOKENUP);
@@ -529,7 +528,8 @@ static void __do_notify(struct mqueue_inode_info *info)
 			break;
 		}
 		/* after notification unregisters process */
-		info->notify_owner = 0;
+		put_pid(info->notify_owner);
+		info->notify_owner = NULL;
 	}
 	wake_up(&info->wait_q);
 }
@@ -567,12 +567,13 @@ static long prepare_timeout(const struct timespec __user *u_arg)
 
 static void remove_notification(struct mqueue_inode_info *info)
 {
-	if (info->notify_owner != 0 &&
+	if (info->notify_owner != NULL &&
 	    info->notify.sigev_notify == SIGEV_THREAD) {
 		set_cookie(info->notify_cookie, NOTIFY_REMOVED);
 		netlink_sendskb(info->notify_sock, info->notify_cookie, 0);
 	}
-	info->notify_owner = 0;
+	put_pid(info->notify_owner);
+	info->notify_owner = NULL;
 }
 
 static int mq_attr_ok(struct mq_attr *attr)
@@ -835,7 +836,7 @@ asmlinkage long sys_mq_timedsend(mqd_t mqdes, const char __user *u_msg_ptr,
 	if (unlikely(!filp))
 		goto out;
 
-	inode = filp->f_dentry->d_inode;
+	inode = filp->f_path.dentry->d_inode;
 	if (unlikely(filp->f_op != &mqueue_file_operations))
 		goto out_fput;
 	info = MQUEUE_I(inode);
@@ -918,7 +919,7 @@ asmlinkage ssize_t sys_mq_timedreceive(mqd_t mqdes, char __user *u_msg_ptr,
 	if (unlikely(!filp))
 		goto out;
 
-	inode = filp->f_dentry->d_inode;
+	inode = filp->f_path.dentry->d_inode;
 	if (unlikely(filp->f_op != &mqueue_file_operations))
 		goto out_fput;
 	info = MQUEUE_I(inode);
@@ -1055,7 +1056,7 @@ retry:
 	if (!filp)
 		goto out;
 
-	inode = filp->f_dentry->d_inode;
+	inode = filp->f_path.dentry->d_inode;
 	if (unlikely(filp->f_op != &mqueue_file_operations))
 		goto out_fput;
 	info = MQUEUE_I(inode);
@@ -1063,11 +1064,11 @@ retry:
 	ret = 0;
 	spin_lock(&info->lock);
 	if (u_notification == NULL) {
-		if (info->notify_owner == current->tgid) {
+		if (info->notify_owner == task_tgid(current)) {
 			remove_notification(info);
 			inode->i_atime = inode->i_ctime = CURRENT_TIME;
 		}
-	} else if (info->notify_owner != 0) {
+	} else if (info->notify_owner != NULL) {
 		ret = -EBUSY;
 	} else {
 		switch (notification.sigev_notify) {
@@ -1087,7 +1088,8 @@ retry:
 			info->notify.sigev_notify = SIGEV_SIGNAL;
 			break;
 		}
-		info->notify_owner = current->tgid;
+
+		info->notify_owner = get_pid(task_tgid(current));
 		inode->i_atime = inode->i_ctime = CURRENT_TIME;
 	}
 	spin_unlock(&info->lock);
@@ -1124,7 +1126,7 @@ asmlinkage long sys_mq_getsetattr(mqd_t mqdes,
 	if (!filp)
 		goto out;
 
-	inode = filp->f_dentry->d_inode;
+	inode = filp->f_path.dentry->d_inode;
 	if (unlikely(filp->f_op != &mqueue_file_operations))
 		goto out_fput;
 	info = MQUEUE_I(inode);
@@ -1275,10 +1277,7 @@ out_filesystem:
 out_sysctl:
 	if (mq_sysctl_table)
 		unregister_sysctl_table(mq_sysctl_table);
-	if (kmem_cache_destroy(mqueue_inode_cachep)) {
-		printk(KERN_INFO
-			"mqueue_inode_cache: not all structures were freed\n");
-	}
+	kmem_cache_destroy(mqueue_inode_cachep);
 	return error;
 }
 
diff --git a/ipc/msg.c b/ipc/msg.c
index 2b4fccf8ea5..a388824740e 100644
--- a/ipc/msg.c
+++ b/ipc/msg.c
@@ -16,6 +16,10 @@
  *
  * support for audit of ipc object properties and permission changes
  * Dustin Kirkland <dustin.kirkland@us.ibm.com>
+ *
+ * namespaces support
+ * OpenVZ, SWsoft Inc.
+ * Pavel Emelianov <xemul@openvz.org>
  */
 
 #include <linux/capability.h>
@@ -31,16 +35,12 @@
 #include <linux/audit.h>
 #include <linux/seq_file.h>
 #include <linux/mutex.h>
+#include <linux/nsproxy.h>
 
 #include <asm/current.h>
 #include <asm/uaccess.h>
 #include "util.h"
 
-/* sysctl: */
-int msg_ctlmax = MSGMAX;
-int msg_ctlmnb = MSGMNB;
-int msg_ctlmni = MSGMNI;
-
 /*
  * one msg_receiver structure for each sleeping receiver:
  */
@@ -52,7 +52,7 @@ struct msg_receiver {
 	long			r_msgtype;
 	long			r_maxsize;
 
-	volatile struct msg_msg	*r_msg;
+	struct msg_msg		*volatile r_msg;
 };
 
 /* one msg_sender for each sleeping sender */
@@ -69,30 +69,76 @@ struct msg_sender {
 static atomic_t msg_bytes =	ATOMIC_INIT(0);
 static atomic_t msg_hdrs =	ATOMIC_INIT(0);
 
-static struct ipc_ids msg_ids;
+static struct ipc_ids init_msg_ids;
 
-#define msg_lock(id)		((struct msg_queue *)ipc_lock(&msg_ids, id))
-#define msg_unlock(msq)		ipc_unlock(&(msq)->q_perm)
-#define msg_rmid(id)		((struct msg_queue *)ipc_rmid(&msg_ids, id))
-#define msg_checkid(msq, msgid)	ipc_checkid(&msg_ids, &msq->q_perm, msgid)
-#define msg_buildid(id, seq)	ipc_buildid(&msg_ids, id, seq)
+#define msg_ids(ns)	(*((ns)->ids[IPC_MSG_IDS]))
 
-static void freeque(struct msg_queue *msq, int id);
-static int newque(key_t key, int msgflg);
+#define msg_lock(ns, id)	((struct msg_queue*)ipc_lock(&msg_ids(ns), id))
+#define msg_unlock(msq)		ipc_unlock(&(msq)->q_perm)
+#define msg_rmid(ns, id)	((struct msg_queue*)ipc_rmid(&msg_ids(ns), id))
+#define msg_checkid(ns, msq, msgid)	\
+	ipc_checkid(&msg_ids(ns), &msq->q_perm, msgid)
+#define msg_buildid(ns, id, seq) \
+	ipc_buildid(&msg_ids(ns), id, seq)
+
+static void freeque (struct ipc_namespace *ns, struct msg_queue *msq, int id);
+static int newque (struct ipc_namespace *ns, key_t key, int msgflg);
 #ifdef CONFIG_PROC_FS
 static int sysvipc_msg_proc_show(struct seq_file *s, void *it);
 #endif
 
+static void __ipc_init __msg_init_ns(struct ipc_namespace *ns, struct ipc_ids *ids)
+{
+	ns->ids[IPC_MSG_IDS] = ids;
+	ns->msg_ctlmax = MSGMAX;
+	ns->msg_ctlmnb = MSGMNB;
+	ns->msg_ctlmni = MSGMNI;
+	ipc_init_ids(ids, ns->msg_ctlmni);
+}
+
+#ifdef CONFIG_IPC_NS
+int msg_init_ns(struct ipc_namespace *ns)
+{
+	struct ipc_ids *ids;
+
+	ids = kmalloc(sizeof(struct ipc_ids), GFP_KERNEL);
+	if (ids == NULL)
+		return -ENOMEM;
+
+	__msg_init_ns(ns, ids);
+	return 0;
+}
+
+void msg_exit_ns(struct ipc_namespace *ns)
+{
+	int i;
+	struct msg_queue *msq;
+
+	mutex_lock(&msg_ids(ns).mutex);
+	for (i = 0; i <= msg_ids(ns).max_id; i++) {
+		msq = msg_lock(ns, i);
+		if (msq == NULL)
+			continue;
+
+		freeque(ns, msq, i);
+	}
+	mutex_unlock(&msg_ids(ns).mutex);
+
+	ipc_fini_ids(ns->ids[IPC_MSG_IDS]);
+	kfree(ns->ids[IPC_MSG_IDS]);
+	ns->ids[IPC_MSG_IDS] = NULL;
+}
+#endif
+
 void __init msg_init(void)
 {
-	ipc_init_ids(&msg_ids, msg_ctlmni);
+	__msg_init_ns(&init_ipc_ns, &init_msg_ids);
 	ipc_init_proc_interface("sysvipc/msg",
 				"       key      msqid perms      cbytes       qnum lspid lrpid   uid   gid  cuid  cgid      stime      rtime      ctime\n",
-				&msg_ids,
-				sysvipc_msg_proc_show);
+				IPC_MSG_IDS, sysvipc_msg_proc_show);
 }
 
-static int newque(key_t key, int msgflg)
+static int newque (struct ipc_namespace *ns, key_t key, int msgflg)
 {
 	struct msg_queue *msq;
 	int id, retval;
@@ -111,18 +157,18 @@ static int newque(key_t key, int msgflg)
 		return retval;
 	}
 
-	id = ipc_addid(&msg_ids, &msq->q_perm, msg_ctlmni);
+	id = ipc_addid(&msg_ids(ns), &msq->q_perm, ns->msg_ctlmni);
 	if (id == -1) {
 		security_msg_queue_free(msq);
 		ipc_rcu_putref(msq);
 		return -ENOSPC;
 	}
 
-	msq->q_id = msg_buildid(id, msq->q_perm.seq);
+	msq->q_id = msg_buildid(ns, id, msq->q_perm.seq);
 	msq->q_stime = msq->q_rtime = 0;
 	msq->q_ctime = get_seconds();
 	msq->q_cbytes = msq->q_qnum = 0;
-	msq->q_qbytes = msg_ctlmnb;
+	msq->q_qbytes = ns->msg_ctlmnb;
 	msq->q_lspid = msq->q_lrpid = 0;
 	INIT_LIST_HEAD(&msq->q_messages);
 	INIT_LIST_HEAD(&msq->q_receivers);
@@ -186,13 +232,13 @@ static void expunge_all(struct msg_queue *msq, int res)
  * msg_ids.mutex and the spinlock for this message queue is hold
  * before freeque() is called. msg_ids.mutex remains locked on exit.
  */
-static void freeque(struct msg_queue *msq, int id)
+static void freeque(struct ipc_namespace *ns, struct msg_queue *msq, int id)
 {
 	struct list_head *tmp;
 
 	expunge_all(msq, -EIDRM);
 	ss_wakeup(&msq->q_senders, 1);
-	msq = msg_rmid(id);
+	msq = msg_rmid(ns, id);
 	msg_unlock(msq);
 
 	tmp = msq->q_messages.next;
@@ -212,24 +258,27 @@ asmlinkage long sys_msgget(key_t key, int msgflg)
 {
 	struct msg_queue *msq;
 	int id, ret = -EPERM;
+	struct ipc_namespace *ns;
+
+	ns = current->nsproxy->ipc_ns;
 	
-	mutex_lock(&msg_ids.mutex);
+	mutex_lock(&msg_ids(ns).mutex);
 	if (key == IPC_PRIVATE) 
-		ret = newque(key, msgflg);
-	else if ((id = ipc_findkey(&msg_ids, key)) == -1) { /* key not used */
+		ret = newque(ns, key, msgflg);
+	else if ((id = ipc_findkey(&msg_ids(ns), key)) == -1) { /* key not used */
 		if (!(msgflg & IPC_CREAT))
 			ret = -ENOENT;
 		else
-			ret = newque(key, msgflg);
+			ret = newque(ns, key, msgflg);
 	} else if (msgflg & IPC_CREAT && msgflg & IPC_EXCL) {
 		ret = -EEXIST;
 	} else {
-		msq = msg_lock(id);
+		msq = msg_lock(ns, id);
 		BUG_ON(msq == NULL);
 		if (ipcperms(&msq->q_perm, msgflg))
 			ret = -EACCES;
 		else {
-			int qid = msg_buildid(id, msq->q_perm.seq);
+			int qid = msg_buildid(ns, id, msq->q_perm.seq);
 
 			ret = security_msg_queue_associate(msq, msgflg);
 			if (!ret)
@@ -237,7 +286,7 @@ asmlinkage long sys_msgget(key_t key, int msgflg)
 		}
 		msg_unlock(msq);
 	}
-	mutex_unlock(&msg_ids.mutex);
+	mutex_unlock(&msg_ids(ns).mutex);
 
 	return ret;
 }
@@ -341,11 +390,13 @@ asmlinkage long sys_msgctl(int msqid, int cmd, struct msqid_ds __user *buf)
 	struct msq_setbuf setbuf;
 	struct msg_queue *msq;
 	int err, version;
+	struct ipc_namespace *ns;
 
 	if (msqid < 0 || cmd < 0)
 		return -EINVAL;
 
 	version = ipc_parse_version(&cmd);
+	ns = current->nsproxy->ipc_ns;
 
 	switch (cmd) {
 	case IPC_INFO:
@@ -366,14 +417,14 @@ asmlinkage long sys_msgctl(int msqid, int cmd, struct msqid_ds __user *buf)
 			return err;
 
 		memset(&msginfo, 0, sizeof(msginfo));
-		msginfo.msgmni = msg_ctlmni;
-		msginfo.msgmax = msg_ctlmax;
-		msginfo.msgmnb = msg_ctlmnb;
+		msginfo.msgmni = ns->msg_ctlmni;
+		msginfo.msgmax = ns->msg_ctlmax;
+		msginfo.msgmnb = ns->msg_ctlmnb;
 		msginfo.msgssz = MSGSSZ;
 		msginfo.msgseg = MSGSEG;
-		mutex_lock(&msg_ids.mutex);
+		mutex_lock(&msg_ids(ns).mutex);
 		if (cmd == MSG_INFO) {
-			msginfo.msgpool = msg_ids.in_use;
+			msginfo.msgpool = msg_ids(ns).in_use;
 			msginfo.msgmap = atomic_read(&msg_hdrs);
 			msginfo.msgtql = atomic_read(&msg_bytes);
 		} else {
@@ -381,8 +432,8 @@ asmlinkage long sys_msgctl(int msqid, int cmd, struct msqid_ds __user *buf)
 			msginfo.msgpool = MSGPOOL;
 			msginfo.msgtql = MSGTQL;
 		}
-		max_id = msg_ids.max_id;
-		mutex_unlock(&msg_ids.mutex);
+		max_id = msg_ids(ns).max_id;
+		mutex_unlock(&msg_ids(ns).mutex);
 		if (copy_to_user(buf, &msginfo, sizeof(struct msginfo)))
 			return -EFAULT;
 		return (max_id < 0) ? 0 : max_id;
@@ -395,20 +446,20 @@ asmlinkage long sys_msgctl(int msqid, int cmd, struct msqid_ds __user *buf)
 
 		if (!buf)
 			return -EFAULT;
-		if (cmd == MSG_STAT && msqid >= msg_ids.entries->size)
+		if (cmd == MSG_STAT && msqid >= msg_ids(ns).entries->size)
 			return -EINVAL;
 
 		memset(&tbuf, 0, sizeof(tbuf));
 
-		msq = msg_lock(msqid);
+		msq = msg_lock(ns, msqid);
 		if (msq == NULL)
 			return -EINVAL;
 
 		if (cmd == MSG_STAT) {
-			success_return = msg_buildid(msqid, msq->q_perm.seq);
+			success_return = msg_buildid(ns, msqid, msq->q_perm.seq);
 		} else {
 			err = -EIDRM;
-			if (msg_checkid(msq, msqid))
+			if (msg_checkid(ns, msq, msqid))
 				goto out_unlock;
 			success_return = 0;
 		}
@@ -446,14 +497,14 @@ asmlinkage long sys_msgctl(int msqid, int cmd, struct msqid_ds __user *buf)
 		return  -EINVAL;
 	}
 
-	mutex_lock(&msg_ids.mutex);
-	msq = msg_lock(msqid);
+	mutex_lock(&msg_ids(ns).mutex);
+	msq = msg_lock(ns, msqid);
 	err = -EINVAL;
 	if (msq == NULL)
 		goto out_up;
 
 	err = -EIDRM;
-	if (msg_checkid(msq, msqid))
+	if (msg_checkid(ns, msq, msqid))
 		goto out_unlock_up;
 	ipcp = &msq->q_perm;
 
@@ -481,7 +532,7 @@ asmlinkage long sys_msgctl(int msqid, int cmd, struct msqid_ds __user *buf)
 	case IPC_SET:
 	{
 		err = -EPERM;
-		if (setbuf.qbytes > msg_ctlmnb && !capable(CAP_SYS_RESOURCE))
+		if (setbuf.qbytes > ns->msg_ctlmnb && !capable(CAP_SYS_RESOURCE))
 			goto out_unlock_up;
 
 		msq->q_qbytes = setbuf.qbytes;
@@ -503,12 +554,12 @@ asmlinkage long sys_msgctl(int msqid, int cmd, struct msqid_ds __user *buf)
 		break;
 	}
 	case IPC_RMID:
-		freeque(msq, msqid);
+		freeque(ns, msq, msqid);
 		break;
 	}
 	err = 0;
 out_up:
-	mutex_unlock(&msg_ids.mutex);
+	mutex_unlock(&msg_ids(ns).mutex);
 	return err;
 out_unlock_up:
 	msg_unlock(msq);
@@ -575,35 +626,35 @@ static inline int pipelined_send(struct msg_queue *msq, struct msg_msg *msg)
 	return 0;
 }
 
-asmlinkage long
-sys_msgsnd(int msqid, struct msgbuf __user *msgp, size_t msgsz, int msgflg)
+long do_msgsnd(int msqid, long mtype, void __user *mtext,
+		size_t msgsz, int msgflg)
 {
 	struct msg_queue *msq;
 	struct msg_msg *msg;
-	long mtype;
 	int err;
+	struct ipc_namespace *ns;
 
-	if (msgsz > msg_ctlmax || (long) msgsz < 0 || msqid < 0)
+	ns = current->nsproxy->ipc_ns;
+
+	if (msgsz > ns->msg_ctlmax || (long) msgsz < 0 || msqid < 0)
 		return -EINVAL;
-	if (get_user(mtype, &msgp->mtype))
-		return -EFAULT;
 	if (mtype < 1)
 		return -EINVAL;
 
-	msg = load_msg(msgp->mtext, msgsz);
+	msg = load_msg(mtext, msgsz);
 	if (IS_ERR(msg))
 		return PTR_ERR(msg);
 
 	msg->m_type = mtype;
 	msg->m_ts = msgsz;
 
-	msq = msg_lock(msqid);
+	msq = msg_lock(ns, msqid);
 	err = -EINVAL;
 	if (msq == NULL)
 		goto out_free;
 
 	err= -EIDRM;
-	if (msg_checkid(msq, msqid))
+	if (msg_checkid(ns, msq, msqid))
 		goto out_unlock_free;
 
 	for (;;) {
@@ -669,6 +720,16 @@ out_free:
 	return err;
 }
 
+asmlinkage long
+sys_msgsnd(int msqid, struct msgbuf __user *msgp, size_t msgsz, int msgflg)
+{
+	long mtype;
+
+	if (get_user(mtype, &msgp->mtype))
+		return -EFAULT;
+	return do_msgsnd(msqid, mtype, msgp->mtext, msgsz, msgflg);
+}
+
 static inline int convert_mode(long *msgtyp, int msgflg)
 {
 	/*
@@ -688,23 +749,25 @@ static inline int convert_mode(long *msgtyp, int msgflg)
 	return SEARCH_EQUAL;
 }
 
-asmlinkage long sys_msgrcv(int msqid, struct msgbuf __user *msgp, size_t msgsz,
-			   long msgtyp, int msgflg)
+long do_msgrcv(int msqid, long *pmtype, void __user *mtext,
+		size_t msgsz, long msgtyp, int msgflg)
 {
 	struct msg_queue *msq;
 	struct msg_msg *msg;
 	int mode;
+	struct ipc_namespace *ns;
 
 	if (msqid < 0 || (long) msgsz < 0)
 		return -EINVAL;
 	mode = convert_mode(&msgtyp, msgflg);
+	ns = current->nsproxy->ipc_ns;
 
-	msq = msg_lock(msqid);
+	msq = msg_lock(ns, msqid);
 	if (msq == NULL)
 		return -EINVAL;
 
 	msg = ERR_PTR(-EIDRM);
-	if (msg_checkid(msq, msqid))
+	if (msg_checkid(ns, msq, msqid))
 		goto out_unlock;
 
 	for (;;) {
@@ -833,15 +896,30 @@ out_unlock:
 		return PTR_ERR(msg);
 
 	msgsz = (msgsz > msg->m_ts) ? msg->m_ts : msgsz;
-	if (put_user (msg->m_type, &msgp->mtype) ||
-	    store_msg(msgp->mtext, msg, msgsz)) {
+	*pmtype = msg->m_type;
+	if (store_msg(mtext, msg, msgsz))
 		msgsz = -EFAULT;
-	}
+
 	free_msg(msg);
 
 	return msgsz;
 }
 
+asmlinkage long sys_msgrcv(int msqid, struct msgbuf __user *msgp, size_t msgsz,
+			   long msgtyp, int msgflg)
+{
+	long err, mtype;
+
+	err =  do_msgrcv(msqid, &mtype, msgp->mtext, msgsz, msgtyp, msgflg);
+	if (err < 0)
+		goto out;
+
+	if (put_user(mtype, &msgp->mtype))
+		err = -EFAULT;
+out:
+	return err;
+}
+
 #ifdef CONFIG_PROC_FS
 static int sysvipc_msg_proc_show(struct seq_file *s, void *it)
 {
diff --git a/ipc/msgutil.c b/ipc/msgutil.c
index 66cfb87646e..0992616eeed 100644
--- a/ipc/msgutil.c
+++ b/ipc/msgutil.c
@@ -1,5 +1,5 @@
 /*
- * linux/ipc/util.c
+ * linux/ipc/msgutil.c
  * Copyright (C) 1999, 2004 Manfred Spraul
  *
  * This file is released under GNU General Public Licence version 2 or
diff --git a/ipc/sem.c b/ipc/sem.c
index 6013c751156..d3e12efd55c 100644
--- a/ipc/sem.c
+++ b/ipc/sem.c
@@ -64,6 +64,10 @@
  *
  * support for audit of ipc object properties and permission changes
  * Dustin Kirkland <dustin.kirkland@us.ibm.com>
+ *
+ * namespaces support
+ * OpenVZ, SWsoft Inc.
+ * Pavel Emelianov <xemul@openvz.org>
  */
 
 #include <linux/slab.h>
@@ -78,22 +82,25 @@
 #include <linux/capability.h>
 #include <linux/seq_file.h>
 #include <linux/mutex.h>
+#include <linux/nsproxy.h>
 
 #include <asm/uaccess.h>
 #include "util.h"
 
+#define sem_ids(ns)	(*((ns)->ids[IPC_SEM_IDS]))
+
+#define sem_lock(ns, id)	((struct sem_array*)ipc_lock(&sem_ids(ns), id))
+#define sem_unlock(sma)		ipc_unlock(&(sma)->sem_perm)
+#define sem_rmid(ns, id)	((struct sem_array*)ipc_rmid(&sem_ids(ns), id))
+#define sem_checkid(ns, sma, semid)	\
+	ipc_checkid(&sem_ids(ns),&sma->sem_perm,semid)
+#define sem_buildid(ns, id, seq) \
+	ipc_buildid(&sem_ids(ns), id, seq)
 
-#define sem_lock(id)	((struct sem_array*)ipc_lock(&sem_ids,id))
-#define sem_unlock(sma)	ipc_unlock(&(sma)->sem_perm)
-#define sem_rmid(id)	((struct sem_array*)ipc_rmid(&sem_ids,id))
-#define sem_checkid(sma, semid)	\
-	ipc_checkid(&sem_ids,&sma->sem_perm,semid)
-#define sem_buildid(id, seq) \
-	ipc_buildid(&sem_ids, id, seq)
-static struct ipc_ids sem_ids;
+static struct ipc_ids init_sem_ids;
 
-static int newary (key_t, int, int);
-static void freeary (struct sem_array *sma, int id);
+static int newary(struct ipc_namespace *, key_t, int, int);
+static void freeary(struct ipc_namespace *ns, struct sem_array *sma, int id);
 #ifdef CONFIG_PROC_FS
 static int sysvipc_sem_proc_show(struct seq_file *s, void *it);
 #endif
@@ -110,22 +117,62 @@ static int sysvipc_sem_proc_show(struct seq_file *s, void *it);
  *	
  */
 
-int sem_ctls[4] = {SEMMSL, SEMMNS, SEMOPM, SEMMNI};
-#define sc_semmsl	(sem_ctls[0])
-#define sc_semmns	(sem_ctls[1])
-#define sc_semopm	(sem_ctls[2])
-#define sc_semmni	(sem_ctls[3])
+#define sc_semmsl	sem_ctls[0]
+#define sc_semmns	sem_ctls[1]
+#define sc_semopm	sem_ctls[2]
+#define sc_semmni	sem_ctls[3]
 
-static int used_sems;
+static void __ipc_init __sem_init_ns(struct ipc_namespace *ns, struct ipc_ids *ids)
+{
+	ns->ids[IPC_SEM_IDS] = ids;
+	ns->sc_semmsl = SEMMSL;
+	ns->sc_semmns = SEMMNS;
+	ns->sc_semopm = SEMOPM;
+	ns->sc_semmni = SEMMNI;
+	ns->used_sems = 0;
+	ipc_init_ids(ids, ns->sc_semmni);
+}
+
+#ifdef CONFIG_IPC_NS
+int sem_init_ns(struct ipc_namespace *ns)
+{
+	struct ipc_ids *ids;
+
+	ids = kmalloc(sizeof(struct ipc_ids), GFP_KERNEL);
+	if (ids == NULL)
+		return -ENOMEM;
+
+	__sem_init_ns(ns, ids);
+	return 0;
+}
+
+void sem_exit_ns(struct ipc_namespace *ns)
+{
+	int i;
+	struct sem_array *sma;
+
+	mutex_lock(&sem_ids(ns).mutex);
+	for (i = 0; i <= sem_ids(ns).max_id; i++) {
+		sma = sem_lock(ns, i);
+		if (sma == NULL)
+			continue;
+
+		freeary(ns, sma, i);
+	}
+	mutex_unlock(&sem_ids(ns).mutex);
+
+	ipc_fini_ids(ns->ids[IPC_SEM_IDS]);
+	kfree(ns->ids[IPC_SEM_IDS]);
+	ns->ids[IPC_SEM_IDS] = NULL;
+}
+#endif
 
 void __init sem_init (void)
 {
-	used_sems = 0;
-	ipc_init_ids(&sem_ids,sc_semmni);
+	__sem_init_ns(&init_ipc_ns, &init_sem_ids);
 	ipc_init_proc_interface("sysvipc/sem",
 				"       key      semid perms      nsems   uid   gid  cuid  cgid      otime      ctime\n",
-				&sem_ids,
-				sysvipc_sem_proc_show);
+				IPC_SEM_IDS, sysvipc_sem_proc_show);
 }
 
 /*
@@ -162,7 +209,7 @@ void __init sem_init (void)
  */
 #define IN_WAKEUP	1
 
-static int newary (key_t key, int nsems, int semflg)
+static int newary (struct ipc_namespace *ns, key_t key, int nsems, int semflg)
 {
 	int id;
 	int retval;
@@ -171,7 +218,7 @@ static int newary (key_t key, int nsems, int semflg)
 
 	if (!nsems)
 		return -EINVAL;
-	if (used_sems + nsems > sc_semmns)
+	if (ns->used_sems + nsems > ns->sc_semmns)
 		return -ENOSPC;
 
 	size = sizeof (*sma) + nsems * sizeof (struct sem);
@@ -191,15 +238,15 @@ static int newary (key_t key, int nsems, int semflg)
 		return retval;
 	}
 
-	id = ipc_addid(&sem_ids, &sma->sem_perm, sc_semmni);
+	id = ipc_addid(&sem_ids(ns), &sma->sem_perm, ns->sc_semmni);
 	if(id == -1) {
 		security_sem_free(sma);
 		ipc_rcu_putref(sma);
 		return -ENOSPC;
 	}
-	used_sems += nsems;
+	ns->used_sems += nsems;
 
-	sma->sem_id = sem_buildid(id, sma->sem_perm.seq);
+	sma->sem_id = sem_buildid(ns, id, sma->sem_perm.seq);
 	sma->sem_base = (struct sem *) &sma[1];
 	/* sma->sem_pending = NULL; */
 	sma->sem_pending_last = &sma->sem_pending;
@@ -215,29 +262,32 @@ asmlinkage long sys_semget (key_t key, int nsems, int semflg)
 {
 	int id, err = -EINVAL;
 	struct sem_array *sma;
+	struct ipc_namespace *ns;
 
-	if (nsems < 0 || nsems > sc_semmsl)
+	ns = current->nsproxy->ipc_ns;
+
+	if (nsems < 0 || nsems > ns->sc_semmsl)
 		return -EINVAL;
-	mutex_lock(&sem_ids.mutex);
+	mutex_lock(&sem_ids(ns).mutex);
 	
 	if (key == IPC_PRIVATE) {
-		err = newary(key, nsems, semflg);
-	} else if ((id = ipc_findkey(&sem_ids, key)) == -1) {  /* key not used */
+		err = newary(ns, key, nsems, semflg);
+	} else if ((id = ipc_findkey(&sem_ids(ns), key)) == -1) {  /* key not used */
 		if (!(semflg & IPC_CREAT))
 			err = -ENOENT;
 		else
-			err = newary(key, nsems, semflg);
+			err = newary(ns, key, nsems, semflg);
 	} else if (semflg & IPC_CREAT && semflg & IPC_EXCL) {
 		err = -EEXIST;
 	} else {
-		sma = sem_lock(id);
+		sma = sem_lock(ns, id);
 		BUG_ON(sma==NULL);
 		if (nsems > sma->sem_nsems)
 			err = -EINVAL;
 		else if (ipcperms(&sma->sem_perm, semflg))
 			err = -EACCES;
 		else {
-			int semid = sem_buildid(id, sma->sem_perm.seq);
+			int semid = sem_buildid(ns, id, sma->sem_perm.seq);
 			err = security_sem_associate(sma, semflg);
 			if (!err)
 				err = semid;
@@ -245,7 +295,7 @@ asmlinkage long sys_semget (key_t key, int nsems, int semflg)
 		sem_unlock(sma);
 	}
 
-	mutex_unlock(&sem_ids.mutex);
+	mutex_unlock(&sem_ids(ns).mutex);
 	return err;
 }
 
@@ -444,7 +494,7 @@ static int count_semzcnt (struct sem_array * sma, ushort semnum)
  * the spinlock for this semaphore set hold. sem_ids.mutex remains locked
  * on exit.
  */
-static void freeary (struct sem_array *sma, int id)
+static void freeary (struct ipc_namespace *ns, struct sem_array *sma, int id)
 {
 	struct sem_undo *un;
 	struct sem_queue *q;
@@ -472,10 +522,10 @@ static void freeary (struct sem_array *sma, int id)
 	}
 
 	/* Remove the semaphore set from the ID array*/
-	sma = sem_rmid(id);
+	sma = sem_rmid(ns, id);
 	sem_unlock(sma);
 
-	used_sems -= sma->sem_nsems;
+	ns->used_sems -= sma->sem_nsems;
 	size = sizeof (*sma) + sma->sem_nsems * sizeof (struct sem);
 	security_sem_free(sma);
 	ipc_rcu_putref(sma);
@@ -503,7 +553,8 @@ static unsigned long copy_semid_to_user(void __user *buf, struct semid64_ds *in,
 	}
 }
 
-static int semctl_nolock(int semid, int semnum, int cmd, int version, union semun arg)
+static int semctl_nolock(struct ipc_namespace *ns, int semid, int semnum,
+		int cmd, int version, union semun arg)
 {
 	int err = -EINVAL;
 	struct sem_array *sma;
@@ -520,24 +571,24 @@ static int semctl_nolock(int semid, int semnum, int cmd, int version, union semu
 			return err;
 		
 		memset(&seminfo,0,sizeof(seminfo));
-		seminfo.semmni = sc_semmni;
-		seminfo.semmns = sc_semmns;
-		seminfo.semmsl = sc_semmsl;
-		seminfo.semopm = sc_semopm;
+		seminfo.semmni = ns->sc_semmni;
+		seminfo.semmns = ns->sc_semmns;
+		seminfo.semmsl = ns->sc_semmsl;
+		seminfo.semopm = ns->sc_semopm;
 		seminfo.semvmx = SEMVMX;
 		seminfo.semmnu = SEMMNU;
 		seminfo.semmap = SEMMAP;
 		seminfo.semume = SEMUME;
-		mutex_lock(&sem_ids.mutex);
+		mutex_lock(&sem_ids(ns).mutex);
 		if (cmd == SEM_INFO) {
-			seminfo.semusz = sem_ids.in_use;
-			seminfo.semaem = used_sems;
+			seminfo.semusz = sem_ids(ns).in_use;
+			seminfo.semaem = ns->used_sems;
 		} else {
 			seminfo.semusz = SEMUSZ;
 			seminfo.semaem = SEMAEM;
 		}
-		max_id = sem_ids.max_id;
-		mutex_unlock(&sem_ids.mutex);
+		max_id = sem_ids(ns).max_id;
+		mutex_unlock(&sem_ids(ns).mutex);
 		if (copy_to_user (arg.__buf, &seminfo, sizeof(struct seminfo))) 
 			return -EFAULT;
 		return (max_id < 0) ? 0: max_id;
@@ -547,12 +598,12 @@ static int semctl_nolock(int semid, int semnum, int cmd, int version, union semu
 		struct semid64_ds tbuf;
 		int id;
 
-		if(semid >= sem_ids.entries->size)
+		if(semid >= sem_ids(ns).entries->size)
 			return -EINVAL;
 
 		memset(&tbuf,0,sizeof(tbuf));
 
-		sma = sem_lock(semid);
+		sma = sem_lock(ns, semid);
 		if(sma == NULL)
 			return -EINVAL;
 
@@ -564,7 +615,7 @@ static int semctl_nolock(int semid, int semnum, int cmd, int version, union semu
 		if (err)
 			goto out_unlock;
 
-		id = sem_buildid(semid, sma->sem_perm.seq);
+		id = sem_buildid(ns, semid, sma->sem_perm.seq);
 
 		kernel_to_ipc64_perm(&sma->sem_perm, &tbuf.sem_perm);
 		tbuf.sem_otime  = sma->sem_otime;
@@ -584,7 +635,8 @@ out_unlock:
 	return err;
 }
 
-static int semctl_main(int semid, int semnum, int cmd, int version, union semun arg)
+static int semctl_main(struct ipc_namespace *ns, int semid, int semnum,
+		int cmd, int version, union semun arg)
 {
 	struct sem_array *sma;
 	struct sem* curr;
@@ -593,14 +645,14 @@ static int semctl_main(int semid, int semnum, int cmd, int version, union semun
 	ushort* sem_io = fast_sem_io;
 	int nsems;
 
-	sma = sem_lock(semid);
+	sma = sem_lock(ns, semid);
 	if(sma==NULL)
 		return -EINVAL;
 
 	nsems = sma->sem_nsems;
 
 	err=-EIDRM;
-	if (sem_checkid(sma,semid))
+	if (sem_checkid(ns,sma,semid))
 		goto out_unlock;
 
 	err = -EACCES;
@@ -802,7 +854,8 @@ static inline unsigned long copy_semid_from_user(struct sem_setbuf *out, void __
 	}
 }
 
-static int semctl_down(int semid, int semnum, int cmd, int version, union semun arg)
+static int semctl_down(struct ipc_namespace *ns, int semid, int semnum,
+		int cmd, int version, union semun arg)
 {
 	struct sem_array *sma;
 	int err;
@@ -813,11 +866,11 @@ static int semctl_down(int semid, int semnum, int cmd, int version, union semun
 		if(copy_semid_from_user (&setbuf, arg.buf, version))
 			return -EFAULT;
 	}
-	sma = sem_lock(semid);
+	sma = sem_lock(ns, semid);
 	if(sma==NULL)
 		return -EINVAL;
 
-	if (sem_checkid(sma,semid)) {
+	if (sem_checkid(ns,sma,semid)) {
 		err=-EIDRM;
 		goto out_unlock;
 	}	
@@ -844,7 +897,7 @@ static int semctl_down(int semid, int semnum, int cmd, int version, union semun
 
 	switch(cmd){
 	case IPC_RMID:
-		freeary(sma, semid);
+		freeary(ns, sma, semid);
 		err = 0;
 		break;
 	case IPC_SET:
@@ -872,17 +925,19 @@ asmlinkage long sys_semctl (int semid, int semnum, int cmd, union semun arg)
 {
 	int err = -EINVAL;
 	int version;
+	struct ipc_namespace *ns;
 
 	if (semid < 0)
 		return -EINVAL;
 
 	version = ipc_parse_version(&cmd);
+	ns = current->nsproxy->ipc_ns;
 
 	switch(cmd) {
 	case IPC_INFO:
 	case SEM_INFO:
 	case SEM_STAT:
-		err = semctl_nolock(semid,semnum,cmd,version,arg);
+		err = semctl_nolock(ns,semid,semnum,cmd,version,arg);
 		return err;
 	case GETALL:
 	case GETVAL:
@@ -892,13 +947,13 @@ asmlinkage long sys_semctl (int semid, int semnum, int cmd, union semun arg)
 	case IPC_STAT:
 	case SETVAL:
 	case SETALL:
-		err = semctl_main(semid,semnum,cmd,version,arg);
+		err = semctl_main(ns,semid,semnum,cmd,version,arg);
 		return err;
 	case IPC_RMID:
 	case IPC_SET:
-		mutex_lock(&sem_ids.mutex);
-		err = semctl_down(semid,semnum,cmd,version,arg);
-		mutex_unlock(&sem_ids.mutex);
+		mutex_lock(&sem_ids(ns).mutex);
+		err = semctl_down(ns,semid,semnum,cmd,version,arg);
+		mutex_unlock(&sem_ids(ns).mutex);
 		return err;
 	default:
 		return -EINVAL;
@@ -949,15 +1004,12 @@ static inline void unlock_semundo(void)
 static inline int get_undo_list(struct sem_undo_list **undo_listp)
 {
 	struct sem_undo_list *undo_list;
-	int size;
 
 	undo_list = current->sysvsem.undo_list;
 	if (!undo_list) {
-		size = sizeof(struct sem_undo_list);
-		undo_list = (struct sem_undo_list *) kmalloc(size, GFP_KERNEL);
+		undo_list = kzalloc(sizeof(*undo_list), GFP_KERNEL);
 		if (undo_list == NULL)
 			return -ENOMEM;
-		memset(undo_list, 0, size);
 		spin_lock_init(&undo_list->lock);
 		atomic_set(&undo_list->refcnt, 1);
 		current->sysvsem.undo_list = undo_list;
@@ -986,7 +1038,7 @@ static struct sem_undo *lookup_undo(struct sem_undo_list *ulp, int semid)
 	return un;
 }
 
-static struct sem_undo *find_undo(int semid)
+static struct sem_undo *find_undo(struct ipc_namespace *ns, int semid)
 {
 	struct sem_array *sma;
 	struct sem_undo_list *ulp;
@@ -1005,12 +1057,12 @@ static struct sem_undo *find_undo(int semid)
 		goto out;
 
 	/* no undo structure around - allocate one. */
-	sma = sem_lock(semid);
+	sma = sem_lock(ns, semid);
 	un = ERR_PTR(-EINVAL);
 	if(sma==NULL)
 		goto out;
 	un = ERR_PTR(-EIDRM);
-	if (sem_checkid(sma,semid)) {
+	if (sem_checkid(ns,sma,semid)) {
 		sem_unlock(sma);
 		goto out;
 	}
@@ -1018,14 +1070,13 @@ static struct sem_undo *find_undo(int semid)
 	ipc_rcu_getref(sma);
 	sem_unlock(sma);
 
-	new = (struct sem_undo *) kmalloc(sizeof(struct sem_undo) + sizeof(short)*nsems, GFP_KERNEL);
+	new = kzalloc(sizeof(struct sem_undo) + sizeof(short)*nsems, GFP_KERNEL);
 	if (!new) {
 		ipc_lock_by_ptr(&sma->sem_perm);
 		ipc_rcu_putref(sma);
 		sem_unlock(sma);
 		return ERR_PTR(-ENOMEM);
 	}
-	memset(new, 0, sizeof(struct sem_undo) + sizeof(short)*nsems);
 	new->semadj = (short *) &new[1];
 	new->semid = semid;
 
@@ -1070,10 +1121,13 @@ asmlinkage long sys_semtimedop(int semid, struct sembuf __user *tsops,
 	int undos = 0, alter = 0, max;
 	struct sem_queue queue;
 	unsigned long jiffies_left = 0;
+	struct ipc_namespace *ns;
+
+	ns = current->nsproxy->ipc_ns;
 
 	if (nsops < 1 || semid < 0)
 		return -EINVAL;
-	if (nsops > sc_semopm)
+	if (nsops > ns->sc_semopm)
 		return -E2BIG;
 	if(nsops > SEMOPM_FAST) {
 		sops = kmalloc(sizeof(*sops)*nsops,GFP_KERNEL);
@@ -1109,7 +1163,7 @@ asmlinkage long sys_semtimedop(int semid, struct sembuf __user *tsops,
 
 retry_undos:
 	if (undos) {
-		un = find_undo(semid);
+		un = find_undo(ns, semid);
 		if (IS_ERR(un)) {
 			error = PTR_ERR(un);
 			goto out_free;
@@ -1117,12 +1171,12 @@ retry_undos:
 	} else
 		un = NULL;
 
-	sma = sem_lock(semid);
+	sma = sem_lock(ns, semid);
 	error=-EINVAL;
 	if(sma==NULL)
 		goto out_free;
 	error = -EIDRM;
-	if (sem_checkid(sma,semid))
+	if (sem_checkid(ns,sma,semid))
 		goto out_unlock_free;
 	/*
 	 * semid identifies are not unique - find_undo may have
@@ -1190,7 +1244,7 @@ retry_undos:
 		goto out_free;
 	}
 
-	sma = sem_lock(semid);
+	sma = sem_lock(ns, semid);
 	if(sma==NULL) {
 		BUG_ON(queue.prev != NULL);
 		error = -EIDRM;
@@ -1267,6 +1321,7 @@ void exit_sem(struct task_struct *tsk)
 {
 	struct sem_undo_list *undo_list;
 	struct sem_undo *u, **up;
+	struct ipc_namespace *ns;
 
 	undo_list = tsk->sysvsem.undo_list;
 	if (!undo_list)
@@ -1275,6 +1330,7 @@ void exit_sem(struct task_struct *tsk)
 	if (!atomic_dec_and_test(&undo_list->refcnt))
 		return;
 
+	ns = tsk->nsproxy->ipc_ns;
 	/* There's no need to hold the semundo list lock, as current
          * is the last task exiting for this undo list.
 	 */
@@ -1288,14 +1344,14 @@ void exit_sem(struct task_struct *tsk)
 
 		if(semid == -1)
 			continue;
-		sma = sem_lock(semid);
+		sma = sem_lock(ns, semid);
 		if (sma == NULL)
 			continue;
 
 		if (u->semid == -1)
 			goto next_entry;
 
-		BUG_ON(sem_checkid(sma,u->semid));
+		BUG_ON(sem_checkid(ns,sma,u->semid));
 
 		/* remove u from the sma->undo list */
 		for (unp = &sma->undo; (un = *unp); unp = &un->id_next) {
diff --git a/ipc/shm.c b/ipc/shm.c
index 940b0c9b13a..6d16bb6de7d 100644
--- a/ipc/shm.c
+++ b/ipc/shm.c
@@ -15,6 +15,10 @@
  *
  * support for audit of ipc object properties and permission changes
  * Dustin Kirkland <dustin.kirkland@us.ibm.com>
+ *
+ * namespaces support
+ * OpenVZ, SWsoft Inc.
+ * Pavel Emelianov <xemul@openvz.org>
  */
 
 #include <linux/slab.h>
@@ -32,6 +36,7 @@
 #include <linux/ptrace.h>
 #include <linux/seq_file.h>
 #include <linux/mutex.h>
+#include <linux/nsproxy.h>
 
 #include <asm/uaccess.h>
 
@@ -40,59 +45,116 @@
 static struct file_operations shm_file_operations;
 static struct vm_operations_struct shm_vm_ops;
 
-static struct ipc_ids shm_ids;
+static struct ipc_ids init_shm_ids;
+
+#define shm_ids(ns)	(*((ns)->ids[IPC_SHM_IDS]))
 
-#define shm_lock(id)	((struct shmid_kernel*)ipc_lock(&shm_ids,id))
-#define shm_unlock(shp)	ipc_unlock(&(shp)->shm_perm)
-#define shm_get(id)	((struct shmid_kernel*)ipc_get(&shm_ids,id))
-#define shm_buildid(id, seq) \
-	ipc_buildid(&shm_ids, id, seq)
+#define shm_lock(ns, id)		\
+	((struct shmid_kernel*)ipc_lock(&shm_ids(ns),id))
+#define shm_unlock(shp)			\
+	ipc_unlock(&(shp)->shm_perm)
+#define shm_get(ns, id)			\
+	((struct shmid_kernel*)ipc_get(&shm_ids(ns),id))
+#define shm_buildid(ns, id, seq)	\
+	ipc_buildid(&shm_ids(ns), id, seq)
 
-static int newseg (key_t key, int shmflg, size_t size);
+static int newseg (struct ipc_namespace *ns, key_t key,
+		int shmflg, size_t size);
 static void shm_open (struct vm_area_struct *shmd);
 static void shm_close (struct vm_area_struct *shmd);
+static void shm_destroy (struct ipc_namespace *ns, struct shmid_kernel *shp);
 #ifdef CONFIG_PROC_FS
 static int sysvipc_shm_proc_show(struct seq_file *s, void *it);
 #endif
 
-size_t	shm_ctlmax = SHMMAX;
-size_t 	shm_ctlall = SHMALL;
-int 	shm_ctlmni = SHMMNI;
+static void __ipc_init __shm_init_ns(struct ipc_namespace *ns, struct ipc_ids *ids)
+{
+	ns->ids[IPC_SHM_IDS] = ids;
+	ns->shm_ctlmax = SHMMAX;
+	ns->shm_ctlall = SHMALL;
+	ns->shm_ctlmni = SHMMNI;
+	ns->shm_tot = 0;
+	ipc_init_ids(ids, 1);
+}
+
+static void do_shm_rmid(struct ipc_namespace *ns, struct shmid_kernel *shp)
+{
+	if (shp->shm_nattch){
+		shp->shm_perm.mode |= SHM_DEST;
+		/* Do not find it any more */
+		shp->shm_perm.key = IPC_PRIVATE;
+		shm_unlock(shp);
+	} else
+		shm_destroy(ns, shp);
+}
+
+#ifdef CONFIG_IPC_NS
+int shm_init_ns(struct ipc_namespace *ns)
+{
+	struct ipc_ids *ids;
+
+	ids = kmalloc(sizeof(struct ipc_ids), GFP_KERNEL);
+	if (ids == NULL)
+		return -ENOMEM;
 
-static int shm_tot; /* total number of shared memory pages */
+	__shm_init_ns(ns, ids);
+	return 0;
+}
+
+void shm_exit_ns(struct ipc_namespace *ns)
+{
+	int i;
+	struct shmid_kernel *shp;
+
+	mutex_lock(&shm_ids(ns).mutex);
+	for (i = 0; i <= shm_ids(ns).max_id; i++) {
+		shp = shm_lock(ns, i);
+		if (shp == NULL)
+			continue;
+
+		do_shm_rmid(ns, shp);
+	}
+	mutex_unlock(&shm_ids(ns).mutex);
+
+	ipc_fini_ids(ns->ids[IPC_SHM_IDS]);
+	kfree(ns->ids[IPC_SHM_IDS]);
+	ns->ids[IPC_SHM_IDS] = NULL;
+}
+#endif
 
 void __init shm_init (void)
 {
-	ipc_init_ids(&shm_ids, 1);
+	__shm_init_ns(&init_ipc_ns, &init_shm_ids);
 	ipc_init_proc_interface("sysvipc/shm",
 				"       key      shmid perms       size  cpid  lpid nattch   uid   gid  cuid  cgid      atime      dtime      ctime\n",
-				&shm_ids,
-				sysvipc_shm_proc_show);
+				IPC_SHM_IDS, sysvipc_shm_proc_show);
 }
 
-static inline int shm_checkid(struct shmid_kernel *s, int id)
+static inline int shm_checkid(struct ipc_namespace *ns,
+		struct shmid_kernel *s, int id)
 {
-	if (ipc_checkid(&shm_ids,&s->shm_perm,id))
+	if (ipc_checkid(&shm_ids(ns), &s->shm_perm, id))
 		return -EIDRM;
 	return 0;
 }
 
-static inline struct shmid_kernel *shm_rmid(int id)
+static inline struct shmid_kernel *shm_rmid(struct ipc_namespace *ns, int id)
 {
-	return (struct shmid_kernel *)ipc_rmid(&shm_ids,id);
+	return (struct shmid_kernel *)ipc_rmid(&shm_ids(ns), id);
 }
 
-static inline int shm_addid(struct shmid_kernel *shp)
+static inline int shm_addid(struct ipc_namespace *ns, struct shmid_kernel *shp)
 {
-	return ipc_addid(&shm_ids, &shp->shm_perm, shm_ctlmni);
+	return ipc_addid(&shm_ids(ns), &shp->shm_perm, ns->shm_ctlmni);
 }
 
 
 
-static inline void shm_inc (int id) {
+static inline void shm_inc(struct ipc_namespace *ns, int id)
+{
 	struct shmid_kernel *shp;
 
-	shp = shm_lock(id);
+	shp = shm_lock(ns, id);
 	BUG_ON(!shp);
 	shp->shm_atim = get_seconds();
 	shp->shm_lprid = current->tgid;
@@ -100,10 +162,13 @@ static inline void shm_inc (int id) {
 	shm_unlock(shp);
 }
 
+#define shm_file_ns(file) (*((struct ipc_namespace **)&(file)->private_data))
+
 /* This is called by fork, once for every shm attach. */
-static void shm_open (struct vm_area_struct *shmd)
+static void shm_open(struct vm_area_struct *shmd)
 {
-	shm_inc (shmd->vm_file->f_dentry->d_inode->i_ino);
+	shm_inc(shm_file_ns(shmd->vm_file),
+			shmd->vm_file->f_path.dentry->d_inode->i_ino);
 }
 
 /*
@@ -114,15 +179,15 @@ static void shm_open (struct vm_area_struct *shmd)
  * It has to be called with shp and shm_ids.mutex locked,
  * but returns with shp unlocked and freed.
  */
-static void shm_destroy (struct shmid_kernel *shp)
+static void shm_destroy(struct ipc_namespace *ns, struct shmid_kernel *shp)
 {
-	shm_tot -= (shp->shm_segsz + PAGE_SIZE - 1) >> PAGE_SHIFT;
-	shm_rmid (shp->id);
+	ns->shm_tot -= (shp->shm_segsz + PAGE_SIZE - 1) >> PAGE_SHIFT;
+	shm_rmid(ns, shp->id);
 	shm_unlock(shp);
 	if (!is_file_hugepages(shp->shm_file))
 		shmem_lock(shp->shm_file, 0, shp->mlock_user);
 	else
-		user_shm_unlock(shp->shm_file->f_dentry->d_inode->i_size,
+		user_shm_unlock(shp->shm_file->f_path.dentry->d_inode->i_size,
 						shp->mlock_user);
 	fput (shp->shm_file);
 	security_shm_free(shp);
@@ -138,22 +203,25 @@ static void shm_destroy (struct shmid_kernel *shp)
 static void shm_close (struct vm_area_struct *shmd)
 {
 	struct file * file = shmd->vm_file;
-	int id = file->f_dentry->d_inode->i_ino;
+	int id = file->f_path.dentry->d_inode->i_ino;
 	struct shmid_kernel *shp;
+	struct ipc_namespace *ns;
 
-	mutex_lock(&shm_ids.mutex);
+	ns = shm_file_ns(file);
+
+	mutex_lock(&shm_ids(ns).mutex);
 	/* remove from the list of attaches of the shm segment */
-	shp = shm_lock(id);
+	shp = shm_lock(ns, id);
 	BUG_ON(!shp);
 	shp->shm_lprid = current->tgid;
 	shp->shm_dtim = get_seconds();
 	shp->shm_nattch--;
 	if(shp->shm_nattch == 0 &&
 	   shp->shm_perm.mode & SHM_DEST)
-		shm_destroy (shp);
+		shm_destroy(ns, shp);
 	else
 		shm_unlock(shp);
-	mutex_unlock(&shm_ids.mutex);
+	mutex_unlock(&shm_ids(ns).mutex);
 }
 
 static int shm_mmap(struct file * file, struct vm_area_struct * vma)
@@ -165,14 +233,25 @@ static int shm_mmap(struct file * file, struct vm_area_struct * vma)
 		vma->vm_ops = &shm_vm_ops;
 		if (!(vma->vm_flags & VM_WRITE))
 			vma->vm_flags &= ~VM_MAYWRITE;
-		shm_inc(file->f_dentry->d_inode->i_ino);
+		shm_inc(shm_file_ns(file), file->f_path.dentry->d_inode->i_ino);
 	}
 
 	return ret;
 }
 
+static int shm_release(struct inode *ino, struct file *file)
+{
+	struct ipc_namespace *ns;
+
+	ns = shm_file_ns(file);
+	put_ipc_ns(ns);
+	shm_file_ns(file) = NULL;
+	return 0;
+}
+
 static struct file_operations shm_file_operations = {
-	.mmap	= shm_mmap,
+	.mmap		= shm_mmap,
+	.release	= shm_release,
 #ifndef CONFIG_MMU
 	.get_unmapped_area = shmem_get_unmapped_area,
 #endif
@@ -188,7 +267,7 @@ static struct vm_operations_struct shm_vm_ops = {
 #endif
 };
 
-static int newseg (key_t key, int shmflg, size_t size)
+static int newseg (struct ipc_namespace *ns, key_t key, int shmflg, size_t size)
 {
 	int error;
 	struct shmid_kernel *shp;
@@ -197,10 +276,10 @@ static int newseg (key_t key, int shmflg, size_t size)
 	char name[13];
 	int id;
 
-	if (size < SHMMIN || size > shm_ctlmax)
+	if (size < SHMMIN || size > ns->shm_ctlmax)
 		return -EINVAL;
 
-	if (shm_tot + numpages >= shm_ctlall)
+	if (ns->shm_tot + numpages >= ns->shm_ctlall)
 		return -ENOSPC;
 
 	shp = ipc_rcu_alloc(sizeof(*shp));
@@ -239,7 +318,7 @@ static int newseg (key_t key, int shmflg, size_t size)
 		goto no_file;
 
 	error = -ENOSPC;
-	id = shm_addid(shp);
+	id = shm_addid(ns, shp);
 	if(id == -1) 
 		goto no_id;
 
@@ -249,15 +328,17 @@ static int newseg (key_t key, int shmflg, size_t size)
 	shp->shm_ctim = get_seconds();
 	shp->shm_segsz = size;
 	shp->shm_nattch = 0;
-	shp->id = shm_buildid(id,shp->shm_perm.seq);
+	shp->id = shm_buildid(ns, id, shp->shm_perm.seq);
 	shp->shm_file = file;
-	file->f_dentry->d_inode->i_ino = shp->id;
+	file->f_path.dentry->d_inode->i_ino = shp->id;
+
+	shm_file_ns(file) = get_ipc_ns(ns);
 
 	/* Hugetlb ops would have already been assigned. */
 	if (!(shmflg & SHM_HUGETLB))
 		file->f_op = &shm_file_operations;
 
-	shm_tot += numpages;
+	ns->shm_tot += numpages;
 	shm_unlock(shp);
 	return shp->id;
 
@@ -273,33 +354,36 @@ asmlinkage long sys_shmget (key_t key, size_t size, int shmflg)
 {
 	struct shmid_kernel *shp;
 	int err, id = 0;
+	struct ipc_namespace *ns;
+
+	ns = current->nsproxy->ipc_ns;
 
-	mutex_lock(&shm_ids.mutex);
+	mutex_lock(&shm_ids(ns).mutex);
 	if (key == IPC_PRIVATE) {
-		err = newseg(key, shmflg, size);
-	} else if ((id = ipc_findkey(&shm_ids, key)) == -1) {
+		err = newseg(ns, key, shmflg, size);
+	} else if ((id = ipc_findkey(&shm_ids(ns), key)) == -1) {
 		if (!(shmflg & IPC_CREAT))
 			err = -ENOENT;
 		else
-			err = newseg(key, shmflg, size);
+			err = newseg(ns, key, shmflg, size);
 	} else if ((shmflg & IPC_CREAT) && (shmflg & IPC_EXCL)) {
 		err = -EEXIST;
 	} else {
-		shp = shm_lock(id);
+		shp = shm_lock(ns, id);
 		BUG_ON(shp==NULL);
 		if (shp->shm_segsz < size)
 			err = -EINVAL;
 		else if (ipcperms(&shp->shm_perm, shmflg))
 			err = -EACCES;
 		else {
-			int shmid = shm_buildid(id, shp->shm_perm.seq);
+			int shmid = shm_buildid(ns, id, shp->shm_perm.seq);
 			err = security_shm_associate(shp, shmflg);
 			if (!err)
 				err = shmid;
 		}
 		shm_unlock(shp);
 	}
-	mutex_unlock(&shm_ids.mutex);
+	mutex_unlock(&shm_ids(ns).mutex);
 
 	return err;
 }
@@ -395,22 +479,23 @@ static inline unsigned long copy_shminfo_to_user(void __user *buf, struct shminf
 	}
 }
 
-static void shm_get_stat(unsigned long *rss, unsigned long *swp) 
+static void shm_get_stat(struct ipc_namespace *ns, unsigned long *rss,
+		unsigned long *swp)
 {
 	int i;
 
 	*rss = 0;
 	*swp = 0;
 
-	for (i = 0; i <= shm_ids.max_id; i++) {
+	for (i = 0; i <= shm_ids(ns).max_id; i++) {
 		struct shmid_kernel *shp;
 		struct inode *inode;
 
-		shp = shm_get(i);
+		shp = shm_get(ns, i);
 		if(!shp)
 			continue;
 
-		inode = shp->shm_file->f_dentry->d_inode;
+		inode = shp->shm_file->f_path.dentry->d_inode;
 
 		if (is_file_hugepages(shp->shm_file)) {
 			struct address_space *mapping = inode->i_mapping;
@@ -430,6 +515,7 @@ asmlinkage long sys_shmctl (int shmid, int cmd, struct shmid_ds __user *buf)
 	struct shm_setbuf setbuf;
 	struct shmid_kernel *shp;
 	int err, version;
+	struct ipc_namespace *ns;
 
 	if (cmd < 0 || shmid < 0) {
 		err = -EINVAL;
@@ -437,6 +523,7 @@ asmlinkage long sys_shmctl (int shmid, int cmd, struct shmid_ds __user *buf)
 	}
 
 	version = ipc_parse_version(&cmd);
+	ns = current->nsproxy->ipc_ns;
 
 	switch (cmd) { /* replace with proc interface ? */
 	case IPC_INFO:
@@ -448,15 +535,15 @@ asmlinkage long sys_shmctl (int shmid, int cmd, struct shmid_ds __user *buf)
 			return err;
 
 		memset(&shminfo,0,sizeof(shminfo));
-		shminfo.shmmni = shminfo.shmseg = shm_ctlmni;
-		shminfo.shmmax = shm_ctlmax;
-		shminfo.shmall = shm_ctlall;
+		shminfo.shmmni = shminfo.shmseg = ns->shm_ctlmni;
+		shminfo.shmmax = ns->shm_ctlmax;
+		shminfo.shmall = ns->shm_ctlall;
 
 		shminfo.shmmin = SHMMIN;
 		if(copy_shminfo_to_user (buf, &shminfo, version))
 			return -EFAULT;
 		/* reading a integer is always atomic */
-		err= shm_ids.max_id;
+		err= shm_ids(ns).max_id;
 		if(err<0)
 			err = 0;
 		goto out;
@@ -470,14 +557,14 @@ asmlinkage long sys_shmctl (int shmid, int cmd, struct shmid_ds __user *buf)
 			return err;
 
 		memset(&shm_info,0,sizeof(shm_info));
-		mutex_lock(&shm_ids.mutex);
-		shm_info.used_ids = shm_ids.in_use;
-		shm_get_stat (&shm_info.shm_rss, &shm_info.shm_swp);
-		shm_info.shm_tot = shm_tot;
+		mutex_lock(&shm_ids(ns).mutex);
+		shm_info.used_ids = shm_ids(ns).in_use;
+		shm_get_stat (ns, &shm_info.shm_rss, &shm_info.shm_swp);
+		shm_info.shm_tot = ns->shm_tot;
 		shm_info.swap_attempts = 0;
 		shm_info.swap_successes = 0;
-		err = shm_ids.max_id;
-		mutex_unlock(&shm_ids.mutex);
+		err = shm_ids(ns).max_id;
+		mutex_unlock(&shm_ids(ns).mutex);
 		if(copy_to_user (buf, &shm_info, sizeof(shm_info))) {
 			err = -EFAULT;
 			goto out;
@@ -492,17 +579,17 @@ asmlinkage long sys_shmctl (int shmid, int cmd, struct shmid_ds __user *buf)
 		struct shmid64_ds tbuf;
 		int result;
 		memset(&tbuf, 0, sizeof(tbuf));
-		shp = shm_lock(shmid);
+		shp = shm_lock(ns, shmid);
 		if(shp==NULL) {
 			err = -EINVAL;
 			goto out;
 		} else if(cmd==SHM_STAT) {
 			err = -EINVAL;
-			if (shmid > shm_ids.max_id)
+			if (shmid > shm_ids(ns).max_id)
 				goto out_unlock;
-			result = shm_buildid(shmid, shp->shm_perm.seq);
+			result = shm_buildid(ns, shmid, shp->shm_perm.seq);
 		} else {
-			err = shm_checkid(shp,shmid);
+			err = shm_checkid(ns, shp,shmid);
 			if(err)
 				goto out_unlock;
 			result = 0;
@@ -534,12 +621,12 @@ asmlinkage long sys_shmctl (int shmid, int cmd, struct shmid_ds __user *buf)
 	case SHM_LOCK:
 	case SHM_UNLOCK:
 	{
-		shp = shm_lock(shmid);
+		shp = shm_lock(ns, shmid);
 		if(shp==NULL) {
 			err = -EINVAL;
 			goto out;
 		}
-		err = shm_checkid(shp,shmid);
+		err = shm_checkid(ns, shp,shmid);
 		if(err)
 			goto out_unlock;
 
@@ -590,12 +677,12 @@ asmlinkage long sys_shmctl (int shmid, int cmd, struct shmid_ds __user *buf)
 		 *	Instead we set a destroyed flag, and then blow
 		 *	the name away when the usage hits zero.
 		 */
-		mutex_lock(&shm_ids.mutex);
-		shp = shm_lock(shmid);
+		mutex_lock(&shm_ids(ns).mutex);
+		shp = shm_lock(ns, shmid);
 		err = -EINVAL;
 		if (shp == NULL) 
 			goto out_up;
-		err = shm_checkid(shp, shmid);
+		err = shm_checkid(ns, shp, shmid);
 		if(err)
 			goto out_unlock_up;
 
@@ -614,14 +701,8 @@ asmlinkage long sys_shmctl (int shmid, int cmd, struct shmid_ds __user *buf)
 		if (err)
 			goto out_unlock_up;
 
-		if (shp->shm_nattch){
-			shp->shm_perm.mode |= SHM_DEST;
-			/* Do not find it any more */
-			shp->shm_perm.key = IPC_PRIVATE;
-			shm_unlock(shp);
-		} else
-			shm_destroy (shp);
-		mutex_unlock(&shm_ids.mutex);
+		do_shm_rmid(ns, shp);
+		mutex_unlock(&shm_ids(ns).mutex);
 		goto out;
 	}
 
@@ -631,12 +712,12 @@ asmlinkage long sys_shmctl (int shmid, int cmd, struct shmid_ds __user *buf)
 			err = -EFAULT;
 			goto out;
 		}
-		mutex_lock(&shm_ids.mutex);
-		shp = shm_lock(shmid);
+		mutex_lock(&shm_ids(ns).mutex);
+		shp = shm_lock(ns, shmid);
 		err=-EINVAL;
 		if(shp==NULL)
 			goto out_up;
-		err = shm_checkid(shp,shmid);
+		err = shm_checkid(ns, shp,shmid);
 		if(err)
 			goto out_unlock_up;
 		err = audit_ipc_obj(&(shp->shm_perm));
@@ -673,7 +754,7 @@ asmlinkage long sys_shmctl (int shmid, int cmd, struct shmid_ds __user *buf)
 out_unlock_up:
 	shm_unlock(shp);
 out_up:
-	mutex_unlock(&shm_ids.mutex);
+	mutex_unlock(&shm_ids(ns).mutex);
 	goto out;
 out_unlock:
 	shm_unlock(shp);
@@ -699,6 +780,7 @@ long do_shmat(int shmid, char __user *shmaddr, int shmflg, ulong *raddr)
 	unsigned long prot;
 	int acc_mode;
 	void *user_addr;
+	struct ipc_namespace *ns;
 
 	if (shmid < 0) {
 		err = -EINVAL;
@@ -737,12 +819,13 @@ long do_shmat(int shmid, char __user *shmaddr, int shmflg, ulong *raddr)
 	 * We cannot rely on the fs check since SYSV IPC does have an
 	 * additional creator id...
 	 */
-	shp = shm_lock(shmid);
+	ns = current->nsproxy->ipc_ns;
+	shp = shm_lock(ns, shmid);
 	if(shp == NULL) {
 		err = -EINVAL;
 		goto out;
 	}
-	err = shm_checkid(shp,shmid);
+	err = shm_checkid(ns, shp,shmid);
 	if (err) {
 		shm_unlock(shp);
 		goto out;
@@ -760,7 +843,7 @@ long do_shmat(int shmid, char __user *shmaddr, int shmflg, ulong *raddr)
 	}
 		
 	file = shp->shm_file;
-	size = i_size_read(file->f_dentry->d_inode);
+	size = i_size_read(file->f_path.dentry->d_inode);
 	shp->shm_nattch++;
 	shm_unlock(shp);
 
@@ -783,16 +866,16 @@ long do_shmat(int shmid, char __user *shmaddr, int shmflg, ulong *raddr)
 invalid:
 	up_write(&current->mm->mmap_sem);
 
-	mutex_lock(&shm_ids.mutex);
-	shp = shm_lock(shmid);
+	mutex_lock(&shm_ids(ns).mutex);
+	shp = shm_lock(ns, shmid);
 	BUG_ON(!shp);
 	shp->shm_nattch--;
 	if(shp->shm_nattch == 0 &&
 	   shp->shm_perm.mode & SHM_DEST)
-		shm_destroy (shp);
+		shm_destroy(ns, shp);
 	else
 		shm_unlock(shp);
-	mutex_unlock(&shm_ids.mutex);
+	mutex_unlock(&shm_ids(ns).mutex);
 
 	*raddr = (unsigned long) user_addr;
 	err = 0;
@@ -865,7 +948,7 @@ asmlinkage long sys_shmdt(char __user *shmaddr)
 			(vma->vm_start - addr)/PAGE_SIZE == vma->vm_pgoff) {
 
 
-			size = vma->vm_file->f_dentry->d_inode->i_size;
+			size = vma->vm_file->f_path.dentry->d_inode->i_size;
 			do_munmap(mm, vma->vm_start, vma->vm_end - vma->vm_start);
 			/*
 			 * We discovered the size of the shm segment, so
diff --git a/ipc/util.c b/ipc/util.c
index 67b6d178db6..a9b7a227b8d 100644
--- a/ipc/util.c
+++ b/ipc/util.c
@@ -12,6 +12,9 @@
  *            Mingming Cao <cmm@us.ibm.com>
  * Mar 2006 - support for audit of ipc object properties
  *            Dustin Kirkland <dustin.kirkland@us.ibm.com>
+ * Jun 2006 - namespaces ssupport
+ *            OpenVZ, SWsoft Inc.
+ *            Pavel Emelianov <xemul@openvz.org>
  */
 
 #include <linux/mm.h>
@@ -29,6 +32,7 @@
 #include <linux/seq_file.h>
 #include <linux/proc_fs.h>
 #include <linux/audit.h>
+#include <linux/nsproxy.h>
 
 #include <asm/unistd.h>
 
@@ -37,10 +41,111 @@
 struct ipc_proc_iface {
 	const char *path;
 	const char *header;
-	struct ipc_ids *ids;
+	int ids;
 	int (*show)(struct seq_file *, void *);
 };
 
+struct ipc_namespace init_ipc_ns = {
+	.kref = {
+		.refcount	= ATOMIC_INIT(2),
+	},
+};
+
+#ifdef CONFIG_IPC_NS
+static struct ipc_namespace *clone_ipc_ns(struct ipc_namespace *old_ns)
+{
+	int err;
+	struct ipc_namespace *ns;
+
+	err = -ENOMEM;
+	ns = kmalloc(sizeof(struct ipc_namespace), GFP_KERNEL);
+	if (ns == NULL)
+		goto err_mem;
+
+	err = sem_init_ns(ns);
+	if (err)
+		goto err_sem;
+	err = msg_init_ns(ns);
+	if (err)
+		goto err_msg;
+	err = shm_init_ns(ns);
+	if (err)
+		goto err_shm;
+
+	kref_init(&ns->kref);
+	return ns;
+
+err_shm:
+	msg_exit_ns(ns);
+err_msg:
+	sem_exit_ns(ns);
+err_sem:
+	kfree(ns);
+err_mem:
+	return ERR_PTR(err);
+}
+
+int unshare_ipcs(unsigned long unshare_flags, struct ipc_namespace **new_ipc)
+{
+	struct ipc_namespace *new;
+
+	if (unshare_flags & CLONE_NEWIPC) {
+		if (!capable(CAP_SYS_ADMIN))
+			return -EPERM;
+
+		new = clone_ipc_ns(current->nsproxy->ipc_ns);
+		if (IS_ERR(new))
+			return PTR_ERR(new);
+
+		*new_ipc = new;
+	}
+
+	return 0;
+}
+
+int copy_ipcs(unsigned long flags, struct task_struct *tsk)
+{
+	struct ipc_namespace *old_ns = tsk->nsproxy->ipc_ns;
+	struct ipc_namespace *new_ns;
+	int err = 0;
+
+	if (!old_ns)
+		return 0;
+
+	get_ipc_ns(old_ns);
+
+	if (!(flags & CLONE_NEWIPC))
+		return 0;
+
+	if (!capable(CAP_SYS_ADMIN)) {
+		err = -EPERM;
+		goto out;
+	}
+
+	new_ns = clone_ipc_ns(old_ns);
+	if (!new_ns) {
+		err = -ENOMEM;
+		goto out;
+	}
+
+	tsk->nsproxy->ipc_ns = new_ns;
+out:
+	put_ipc_ns(old_ns);
+	return err;
+}
+
+void free_ipc_ns(struct kref *kref)
+{
+	struct ipc_namespace *ns;
+
+	ns = container_of(kref, struct ipc_namespace, kref);
+	sem_exit_ns(ns);
+	msg_exit_ns(ns);
+	shm_exit_ns(ns);
+	kfree(ns);
+}
+#endif
+
 /**
  *	ipc_init	-	initialise IPC subsystem
  *
@@ -67,7 +172,7 @@ __initcall(ipc_init);
  *	array itself. 
  */
  
-void __init ipc_init_ids(struct ipc_ids* ids, int size)
+void __ipc_init ipc_init_ids(struct ipc_ids* ids, int size)
 {
 	int i;
 
@@ -110,8 +215,7 @@ static struct file_operations sysvipc_proc_fops;
  *	@show: show routine.
  */
 void __init ipc_init_proc_interface(const char *path, const char *header,
-				    struct ipc_ids *ids,
-				    int (*show)(struct seq_file *, void *))
+		int ids, int (*show)(struct seq_file *, void *))
 {
 	struct proc_dir_entry *pde;
 	struct ipc_proc_iface *iface;
@@ -197,7 +301,7 @@ static int grow_ary(struct ipc_ids* ids, int newsize)
 	 */
 	rcu_assign_pointer(ids->entries, new);
 
-	ipc_rcu_putref(old);
+	__ipc_fini_ids(ids, old);
 	return newsize;
 }
 
@@ -410,6 +514,11 @@ void ipc_rcu_getref(void *ptr)
 	container_of(ptr, struct ipc_rcu_hdr, data)->refcount++;
 }
 
+static void ipc_do_vfree(struct work_struct *work)
+{
+	vfree(container_of(work, struct ipc_rcu_sched, work));
+}
+
 /**
  * ipc_schedule_free - free ipc + rcu space
  * @head: RCU callback structure for queued work
@@ -424,7 +533,7 @@ static void ipc_schedule_free(struct rcu_head *head)
 	struct ipc_rcu_sched *sched =
 			container_of(&(grace->data[0]), struct ipc_rcu_sched, data[0]);
 
-	INIT_WORK(&sched->work, vfree, sched);
+	INIT_WORK(&sched->work, ipc_do_vfree);
 	schedule_work(&sched->work);
 }
 
@@ -635,6 +744,9 @@ static void *sysvipc_proc_next(struct seq_file *s, void *it, loff_t *pos)
 	struct ipc_proc_iface *iface = s->private;
 	struct kern_ipc_perm *ipc = it;
 	loff_t p;
+	struct ipc_ids *ids;
+
+	ids = current->nsproxy->ipc_ns->ids[iface->ids];
 
 	/* If we had an ipc id locked before, unlock it */
 	if (ipc && ipc != SEQ_START_TOKEN)
@@ -644,8 +756,8 @@ static void *sysvipc_proc_next(struct seq_file *s, void *it, loff_t *pos)
 	 * p = *pos - 1 (because id 0 starts at position 1)
 	 *          + 1 (because we increment the position by one)
 	 */
-	for (p = *pos; p <= iface->ids->max_id; p++) {
-		if ((ipc = ipc_lock(iface->ids, p)) != NULL) {
+	for (p = *pos; p <= ids->max_id; p++) {
+		if ((ipc = ipc_lock(ids, p)) != NULL) {
 			*pos = p + 1;
 			return ipc;
 		}
@@ -664,12 +776,15 @@ static void *sysvipc_proc_start(struct seq_file *s, loff_t *pos)
 	struct ipc_proc_iface *iface = s->private;
 	struct kern_ipc_perm *ipc;
 	loff_t p;
+	struct ipc_ids *ids;
+
+	ids = current->nsproxy->ipc_ns->ids[iface->ids];
 
 	/*
 	 * Take the lock - this will be released by the corresponding
 	 * call to stop().
 	 */
-	mutex_lock(&iface->ids->mutex);
+	mutex_lock(&ids->mutex);
 
 	/* pos < 0 is invalid */
 	if (*pos < 0)
@@ -680,8 +795,8 @@ static void *sysvipc_proc_start(struct seq_file *s, loff_t *pos)
 		return SEQ_START_TOKEN;
 
 	/* Find the (pos-1)th ipc */
-	for (p = *pos - 1; p <= iface->ids->max_id; p++) {
-		if ((ipc = ipc_lock(iface->ids, p)) != NULL) {
+	for (p = *pos - 1; p <= ids->max_id; p++) {
+		if ((ipc = ipc_lock(ids, p)) != NULL) {
 			*pos = p + 1;
 			return ipc;
 		}
@@ -693,13 +808,15 @@ static void sysvipc_proc_stop(struct seq_file *s, void *it)
 {
 	struct kern_ipc_perm *ipc = it;
 	struct ipc_proc_iface *iface = s->private;
+	struct ipc_ids *ids;
 
 	/* If we had a locked segment, release it */
 	if (ipc && ipc != SEQ_START_TOKEN)
 		ipc_unlock(ipc);
 
+	ids = current->nsproxy->ipc_ns->ids[iface->ids];
 	/* Release the lock we took in start() */
-	mutex_unlock(&iface->ids->mutex);
+	mutex_unlock(&ids->mutex);
 }
 
 static int sysvipc_proc_show(struct seq_file *s, void *it)
diff --git a/ipc/util.h b/ipc/util.h
index 0181553d31d..e3aa2c5c97d 100644
--- a/ipc/util.h
+++ b/ipc/util.h
@@ -3,6 +3,8 @@
  * Copyright (C) 1999 Christoph Rohland
  *
  * ipc helper functions (c) 1999 Manfred Spraul <manfred@colorfullife.com>
+ * namespaces support.      2006 OpenVZ, SWsoft Inc.
+ *                               Pavel Emelianov <xemul@openvz.org>
  */
 
 #ifndef _IPC_UTIL_H
@@ -15,6 +17,14 @@ void sem_init (void);
 void msg_init (void);
 void shm_init (void);
 
+int sem_init_ns(struct ipc_namespace *ns);
+int msg_init_ns(struct ipc_namespace *ns);
+int shm_init_ns(struct ipc_namespace *ns);
+
+void sem_exit_ns(struct ipc_namespace *ns);
+void msg_exit_ns(struct ipc_namespace *ns);
+void shm_exit_ns(struct ipc_namespace *ns);
+
 struct ipc_id_ary {
 	int size;
 	struct kern_ipc_perm *p[0];
@@ -31,15 +41,23 @@ struct ipc_ids {
 };
 
 struct seq_file;
-void __init ipc_init_ids(struct ipc_ids* ids, int size);
+#ifdef CONFIG_IPC_NS
+#define __ipc_init
+#else
+#define __ipc_init	__init
+#endif
+void __ipc_init ipc_init_ids(struct ipc_ids *ids, int size);
 #ifdef CONFIG_PROC_FS
 void __init ipc_init_proc_interface(const char *path, const char *header,
-				    struct ipc_ids *ids,
-				    int (*show)(struct seq_file *, void *));
+		int ids, int (*show)(struct seq_file *, void *));
 #else
 #define ipc_init_proc_interface(path, header, ids, show) do {} while (0)
 #endif
 
+#define IPC_SEM_IDS	0
+#define IPC_MSG_IDS	1
+#define IPC_SHM_IDS	2
+
 /* must be called with ids->mutex acquired.*/
 int ipc_findkey(struct ipc_ids* ids, key_t key);
 int ipc_addid(struct ipc_ids* ids, struct kern_ipc_perm* new, int size);
@@ -65,6 +83,18 @@ void* ipc_rcu_alloc(int size);
 void ipc_rcu_getref(void *ptr);
 void ipc_rcu_putref(void *ptr);
 
+static inline void __ipc_fini_ids(struct ipc_ids *ids,
+		struct ipc_id_ary *entries)
+{
+	if (entries != &ids->nullentry)
+		ipc_rcu_putref(entries);
+}
+
+static inline void ipc_fini_ids(struct ipc_ids *ids)
+{
+	__ipc_fini_ids(ids, ids->entries);
+}
+
 struct kern_ipc_perm* ipc_get(struct ipc_ids* ids, int id);
 struct kern_ipc_perm* ipc_lock(struct ipc_ids* ids, int id);
 void ipc_lock_by_ptr(struct kern_ipc_perm *ipcp);