X-Git-Url: http://git.rot13.org/?a=blobdiff_plain;f=kernel%2Fpid.c;h=a32859c4a3cd725cebb02f43e11e04a6cdef6888;hb=cf4fc6cb76e50b01666e28a9f4b2e6fbcbb96d5f;hp=d1db36b94674dbdc318845233b1804c659515740;hpb=b3d9d6be035a7d1cc6740cee695301bf37caedcd;p=powerpc.git

diff --git a/kernel/pid.c b/kernel/pid.c
index d1db36b946..a32859c4a3 100644
--- a/kernel/pid.c
+++ b/kernel/pid.c
@@ -41,7 +41,6 @@
 static struct hlist_head *pid_hash;
 static int pidhash_shift;
 struct pid init_struct_pid = INIT_STRUCT_PID;
-static struct kmem_cache *pid_ns_cachep;
 
 int pid_max = PID_MAX_DEFAULT;
 
@@ -181,7 +180,7 @@ static int alloc_pidmap(struct pid_namespace *pid_ns)
 	return -1;
 }
 
-static int next_pidmap(struct pid_namespace *pid_ns, int last)
+int next_pidmap(struct pid_namespace *pid_ns, int last)
 {
 	int offset;
 	struct pidmap *map, *end;
@@ -368,6 +367,7 @@ struct task_struct * fastcall pid_task(struct pid *pid, enum pid_type type)
 	}
 	return result;
 }
+EXPORT_SYMBOL(pid_task);
 
 /*
  * Must be called under rcu_read_lock() or with tasklist_lock read-held.
@@ -443,6 +443,12 @@ pid_t pid_nr_ns(struct pid *pid, struct pid_namespace *ns)
 	return nr;
 }
 
+pid_t pid_vnr(struct pid *pid)
+{
+	return pid_nr_ns(pid, current->nsproxy->pid_ns);
+}
+EXPORT_SYMBOL_GPL(pid_vnr);
+
 pid_t task_pid_nr_ns(struct task_struct *tsk, struct pid_namespace *ns)
 {
 	return pid_nr_ns(task_pid(tsk), ns);
@@ -487,178 +493,6 @@ struct pid *find_ge_pid(int nr, struct pid_namespace *ns)
 }
 EXPORT_SYMBOL_GPL(find_get_pid);
 
-struct pid_cache {
-	int nr_ids;
-	char name[16];
-	struct kmem_cache *cachep;
-	struct list_head list;
-};
-
-static LIST_HEAD(pid_caches_lh);
-static DEFINE_MUTEX(pid_caches_mutex);
-
-/*
- * creates the kmem cache to allocate pids from.
- * @nr_ids: the number of numerical ids this pid will have to carry
- */
-
-static struct kmem_cache *create_pid_cachep(int nr_ids)
-{
-	struct pid_cache *pcache;
-	struct kmem_cache *cachep;
-
-	mutex_lock(&pid_caches_mutex);
-	list_for_each_entry (pcache, &pid_caches_lh, list)
-		if (pcache->nr_ids == nr_ids)
-			goto out;
-
-	pcache = kmalloc(sizeof(struct pid_cache), GFP_KERNEL);
-	if (pcache == NULL)
-		goto err_alloc;
-
-	snprintf(pcache->name, sizeof(pcache->name), "pid_%d", nr_ids);
-	cachep = kmem_cache_create(pcache->name,
-			sizeof(struct pid) + (nr_ids - 1) * sizeof(struct upid),
-			0, SLAB_HWCACHE_ALIGN, NULL);
-	if (cachep == NULL)
-		goto err_cachep;
-
-	pcache->nr_ids = nr_ids;
-	pcache->cachep = cachep;
-	list_add(&pcache->list, &pid_caches_lh);
-out:
-	mutex_unlock(&pid_caches_mutex);
-	return pcache->cachep;
-
-err_cachep:
-	kfree(pcache);
-err_alloc:
-	mutex_unlock(&pid_caches_mutex);
-	return NULL;
-}
-
-static struct pid_namespace *create_pid_namespace(int level)
-{
-	struct pid_namespace *ns;
-	int i;
-
-	ns = kmem_cache_alloc(pid_ns_cachep, GFP_KERNEL);
-	if (ns == NULL)
-		goto out;
-
-	ns->pidmap[0].page = kzalloc(PAGE_SIZE, GFP_KERNEL);
-	if (!ns->pidmap[0].page)
-		goto out_free;
-
-	ns->pid_cachep = create_pid_cachep(level + 1);
-	if (ns->pid_cachep == NULL)
-		goto out_free_map;
-
-	kref_init(&ns->kref);
-	ns->last_pid = 0;
-	ns->child_reaper = NULL;
-	ns->level = level;
-
-	set_bit(0, ns->pidmap[0].page);
-	atomic_set(&ns->pidmap[0].nr_free, BITS_PER_PAGE - 1);
-
-	for (i = 1; i < PIDMAP_ENTRIES; i++) {
-		ns->pidmap[i].page = 0;
-		atomic_set(&ns->pidmap[i].nr_free, BITS_PER_PAGE);
-	}
-
-	return ns;
-
-out_free_map:
-	kfree(ns->pidmap[0].page);
-out_free:
-	kmem_cache_free(pid_ns_cachep, ns);
-out:
-	return ERR_PTR(-ENOMEM);
-}
-
-static void destroy_pid_namespace(struct pid_namespace *ns)
-{
-	int i;
-
-	for (i = 0; i < PIDMAP_ENTRIES; i++)
-		kfree(ns->pidmap[i].page);
-	kmem_cache_free(pid_ns_cachep, ns);
-}
-
-struct pid_namespace *copy_pid_ns(unsigned long flags, struct pid_namespace *old_ns)
-{
-	struct pid_namespace *new_ns;
-
-	BUG_ON(!old_ns);
-	new_ns = get_pid_ns(old_ns);
-	if (!(flags & CLONE_NEWPID))
-		goto out;
-
-	new_ns = ERR_PTR(-EINVAL);
-	if (flags & CLONE_THREAD)
-		goto out_put;
-
-	new_ns = create_pid_namespace(old_ns->level + 1);
-	if (!IS_ERR(new_ns))
-		new_ns->parent = get_pid_ns(old_ns);
-
-out_put:
-	put_pid_ns(old_ns);
-out:
-	return new_ns;
-}
-
-void free_pid_ns(struct kref *kref)
-{
-	struct pid_namespace *ns, *parent;
-
-	ns = container_of(kref, struct pid_namespace, kref);
-
-	parent = ns->parent;
-	destroy_pid_namespace(ns);
-
-	if (parent != NULL)
-		put_pid_ns(parent);
-}
-
-void zap_pid_ns_processes(struct pid_namespace *pid_ns)
-{
-	int nr;
-	int rc;
-
-	/*
-	 * The last thread in the cgroup-init thread group is terminating.
-	 * Find remaining pid_ts in the namespace, signal and wait for them
-	 * to exit.
-	 *
-	 * Note:  This signals each threads in the namespace - even those that
-	 * 	  belong to the same thread group, To avoid this, we would have
-	 * 	  to walk the entire tasklist looking a processes in this
-	 * 	  namespace, but that could be unnecessarily expensive if the
-	 * 	  pid namespace has just a few processes. Or we need to
-	 * 	  maintain a tasklist for each pid namespace.
-	 *
-	 */
-	read_lock(&tasklist_lock);
-	nr = next_pidmap(pid_ns, 1);
-	while (nr > 0) {
-		kill_proc_info(SIGKILL, SEND_SIG_PRIV, nr);
-		nr = next_pidmap(pid_ns, nr);
-	}
-	read_unlock(&tasklist_lock);
-
-	do {
-		clear_thread_flag(TIF_SIGPENDING);
-		rc = sys_wait4(-1, NULL, __WALL, NULL);
-	} while (rc != -ECHILD);
-
-
-	/* Child reaper for the pid namespace is going away */
-	pid_ns->child_reaper = NULL;
-	return;
-}
-
 /*
  * The pid hash table is scaled according to the amount of memory in the
  * machine.  From a minimum of 16 slots up to 4096 slots at one gigabyte or
@@ -691,9 +525,6 @@ void __init pidmap_init(void)
 	set_bit(0, init_pid_ns.pidmap[0].page);
 	atomic_dec(&init_pid_ns.pidmap[0].nr_free);
 
-	init_pid_ns.pid_cachep = create_pid_cachep(1);
-	if (init_pid_ns.pid_cachep == NULL)
-		panic("Can't create pid_1 cachep\n");
-
-	pid_ns_cachep = KMEM_CACHE(pid_namespace, SLAB_PANIC);
+	init_pid_ns.pid_cachep = KMEM_CACHE(pid,
+			SLAB_HWCACHE_ALIGN | SLAB_PANIC);
 }