split invalidate_inodes()
[linux-2.6.git] / fs / inode.c
index f6b3b52..a6d6068 100644 (file)
@@ -478,6 +478,49 @@ static void dispose_list(struct list_head *head)
 }
 
 /**
+ * evict_inodes        - evict all evictable inodes for a superblock
+ * @sb:                superblock to operate on
+ *
+ * Make sure that no inodes with zero refcount are retained.  This is
+ * called by superblock shutdown after having MS_ACTIVE flag removed,
+ * so any inode reaching zero refcount during or after that call will
+ * be immediately evicted.
+ */
+void evict_inodes(struct super_block *sb)
+{
+       struct inode *inode, *next;
+       LIST_HEAD(dispose);
+
+       down_write(&iprune_sem);
+
+       spin_lock(&inode_lock);
+       list_for_each_entry_safe(inode, next, &sb->s_inodes, i_sb_list) {
+               if (atomic_read(&inode->i_count))
+                       continue;
+
+               if (inode->i_state & (I_NEW | I_FREEING | I_WILL_FREE)) {
+                       WARN_ON(1);
+                       continue;
+               }
+
+               inode->i_state |= I_FREEING;
+
+               /*
+                * Move the inode off the IO lists and LRU once I_FREEING is
+                * set so that it won't get moved back on there if it is dirty.
+                */
+               list_move(&inode->i_lru, &dispose);
+               list_del_init(&inode->i_wb_list);
+               if (!(inode->i_state & (I_DIRTY | I_SYNC)))
+                       percpu_counter_dec(&nr_inodes_unused);
+       }
+       spin_unlock(&inode_lock);
+
+       dispose_list(&dispose);
+       up_write(&iprune_sem);
+}
+
+/**
  * invalidate_inodes   - attempt to free all inodes on a superblock
  * @sb:                superblock to operate on
  *
@@ -493,9 +536,8 @@ int invalidate_inodes(struct super_block *sb)
        down_write(&iprune_sem);
 
        spin_lock(&inode_lock);
-       fsnotify_unmount_inodes(&sb->s_inodes);
        list_for_each_entry_safe(inode, next, &sb->s_inodes, i_sb_list) {
-               if (inode->i_state & I_NEW)
+               if (inode->i_state & (I_NEW | I_FREEING | I_WILL_FREE))
                        continue;
                if (atomic_read(&inode->i_count)) {
                        busy = 1;