X-Git-Url: http://drtracing.org/?a=blobdiff_plain;f=kernel%2Ffutex.c;h=86b2600381b616db0d157ac9e172a3fc55315be4;hb=b488893a390edfe027bae7a46e9af8083e740668;hp=fcc94e7b40864afcb72170f19d832f8117e517fc;hpb=ab3e975e7c8b5efb452bdb0d06c1cb7399f83979;p=deliverable%2Flinux.git

diff --git a/kernel/futex.c b/kernel/futex.c
index fcc94e7b4086..86b2600381b6 100644
--- a/kernel/futex.c
+++ b/kernel/futex.c
@@ -52,6 +52,10 @@
 #include <linux/syscalls.h>
 #include <linux/signal.h>
 #include <linux/module.h>
+#include <linux/magic.h>
+#include <linux/pid.h>
+#include <linux/nsproxy.h>
+
 #include <asm/futex.h>
 
 #include "rtmutex_common.h"
@@ -292,7 +296,7 @@ EXPORT_SYMBOL_GPL(get_futex_key_refs);
  */
 void drop_futex_key_refs(union futex_key *key)
 {
-	if (key->both.ptr == 0)
+	if (!key->both.ptr)
 		return;
 	switch (key->both.offset & (FUT_OFF_INODE|FUT_OFF_MMSHARED)) {
 		case FUT_OFF_INODE:
@@ -442,7 +446,8 @@ static struct task_struct * futex_find_get_task(pid_t pid)
 	struct task_struct *p;
 
 	rcu_read_lock();
-	p = find_task_by_pid(pid);
+	p = find_task_by_pid_ns(pid,
+			current->nsproxy->pid_ns);
 
 	if (!p || ((current->euid != p->euid) && (current->euid != p->uid)))
 		p = ERR_PTR(-ESRCH);
@@ -652,7 +657,7 @@ static int wake_futex_pi(u32 __user *uaddr, u32 uval, struct futex_q *this)
 	if (!(uval & FUTEX_OWNER_DIED)) {
 		int ret = 0;
 
-		newval = FUTEX_WAITERS | new_owner->pid;
+		newval = FUTEX_WAITERS | task_pid_vnr(new_owner);
 
 		curval = cmpxchg_futex_value_locked(uaddr, uval, newval);
 
@@ -1045,7 +1050,7 @@ static int unqueue_me(struct futex_q *q)
  retry:
 	lock_ptr = q->lock_ptr;
 	barrier();
-	if (lock_ptr != 0) {
+	if (lock_ptr != NULL) {
 		spin_lock(lock_ptr);
 		/*
 		 * q->lock_ptr can change between reading it and
@@ -1105,7 +1110,7 @@ static void unqueue_me_pi(struct futex_q *q)
 static int fixup_pi_state_owner(u32 __user *uaddr, struct futex_q *q,
 				struct task_struct *curr)
 {
-	u32 newtid = curr->pid | FUTEX_WAITERS;
+	u32 newtid = task_pid_vnr(curr) | FUTEX_WAITERS;
 	struct futex_pi_state *pi_state = q->pi_state;
 	u32 uval, curval, newval;
 	int ret;
@@ -1367,7 +1372,7 @@ static int futex_lock_pi(u32 __user *uaddr, struct rw_semaphore *fshared,
 	 * (by doing a 0 -> TID atomic cmpxchg), while holding all
 	 * the locks. It will most likely not succeed.
 	 */
-	newval = current->pid;
+	newval = task_pid_vnr(current);
 
 	curval = cmpxchg_futex_value_locked(uaddr, 0, newval);
 
@@ -1378,7 +1383,7 @@ static int futex_lock_pi(u32 __user *uaddr, struct rw_semaphore *fshared,
 	 * Detect deadlocks. In case of REQUEUE_PI this is a valid
 	 * situation and we return success to user space.
 	 */
-	if (unlikely((curval & FUTEX_TID_MASK) == current->pid)) {
+	if (unlikely((curval & FUTEX_TID_MASK) == task_pid_vnr(current))) {
 		ret = -EDEADLK;
 		goto out_unlock_release_sem;
 	}
@@ -1407,7 +1412,7 @@ static int futex_lock_pi(u32 __user *uaddr, struct rw_semaphore *fshared,
 	 */
 	if (unlikely(ownerdied || !(curval & FUTEX_TID_MASK))) {
 		/* Keep the OWNER_DIED bit */
-		newval = (curval & ~FUTEX_TID_MASK) | current->pid;
+		newval = (curval & ~FUTEX_TID_MASK) | task_pid_vnr(current);
 		ownerdied = 0;
 		lock_taken = 1;
 	}
@@ -1586,7 +1591,7 @@ retry:
 	/*
 	 * We release only a lock we actually own:
 	 */
-	if ((uval & FUTEX_TID_MASK) != current->pid)
+	if ((uval & FUTEX_TID_MASK) != task_pid_vnr(current))
 		return -EPERM;
 	/*
 	 * First take all the futex related locks:
@@ -1607,7 +1612,7 @@ retry_unlocked:
 	 * anyone else up:
 	 */
 	if (!(uval & FUTEX_OWNER_DIED))
-		uval = cmpxchg_futex_value_locked(uaddr, current->pid, 0);
+		uval = cmpxchg_futex_value_locked(uaddr, task_pid_vnr(current), 0);
 
 
 	if (unlikely(uval == -EFAULT))
@@ -1616,7 +1621,7 @@ retry_unlocked:
 	 * Rare case: we managed to release the lock atomically,
 	 * no need to wake anyone else up:
 	 */
-	if (unlikely(uval == current->pid))
+	if (unlikely(uval == task_pid_vnr(current)))
 		goto out_unlock;
 
 	/*
@@ -1853,7 +1858,8 @@ sys_get_robust_list(int pid, struct robust_list_head __user * __user *head_ptr,
 
 		ret = -ESRCH;
 		rcu_read_lock();
-		p = find_task_by_pid(pid);
+		p = find_task_by_pid_ns(pid,
+				current->nsproxy->pid_ns);
 		if (!p)
 			goto err_unlock;
 		ret = -EPERM;
@@ -1886,7 +1892,7 @@ retry:
 	if (get_user(uval, uaddr))
 		return -1;
 
-	if ((uval & FUTEX_TID_MASK) == curr->pid) {
+	if ((uval & FUTEX_TID_MASK) == task_pid_vnr(curr)) {
 		/*
 		 * Ok, this dying thread is truly holding a futex
 		 * of interest. Set the OWNER_DIED bit atomically
@@ -2080,7 +2086,7 @@ static int futexfs_get_sb(struct file_system_type *fs_type,
 			  int flags, const char *dev_name, void *data,
 			  struct vfsmount *mnt)
 {
-	return get_sb_pseudo(fs_type, "futex", NULL, 0xBAD1DEA, mnt);
+	return get_sb_pseudo(fs_type, "futex", NULL, FUTEXFS_SUPER_MAGIC, mnt);
 }
 
 static struct file_system_type futex_fs_type = {