X-Git-Url: http://git.rot13.org/?a=blobdiff_plain;f=fs%2Finode.c;h=5abb097ab1b0d998421cdc1cbad6319e5e04b00a;hb=7e35280e517c28b991667a608990227503dd2a30;hp=bf6bec4e54ff648b4696c04909dcf2a5000c8748;hpb=e30fdb1e026c2d05f216d2e5a25bfafdfd261ec2;p=powerpc.git

diff --git a/fs/inode.c b/fs/inode.c
index bf6bec4e54..5abb097ab1 100644
--- a/fs/inode.c
+++ b/fs/inode.c
@@ -97,7 +97,7 @@ static DEFINE_MUTEX(iprune_mutex);
  */
 struct inodes_stat_t inodes_stat;
 
-static kmem_cache_t * inode_cachep __read_mostly;
+static struct kmem_cache * inode_cachep __read_mostly;
 
 static struct inode *alloc_inode(struct super_block *sb)
 {
@@ -109,7 +109,7 @@ static struct inode *alloc_inode(struct super_block *sb)
 	if (sb->s_op->alloc_inode)
 		inode = sb->s_op->alloc_inode(sb);
 	else
-		inode = (struct inode *) kmem_cache_alloc(inode_cachep, SLAB_KERNEL);
+		inode = (struct inode *) kmem_cache_alloc(inode_cachep, GFP_KERNEL);
 
 	if (inode) {
 		struct address_space * const mapping = &inode->i_data;
@@ -162,7 +162,7 @@ static struct inode *alloc_inode(struct super_block *sb)
 				bdi = sb->s_bdev->bd_inode->i_mapping->backing_dev_info;
 			mapping->backing_dev_info = bdi;
 		}
-		inode->i_private = 0;
+		inode->i_private = NULL;
 		inode->i_mapping = mapping;
 	}
 	return inode;
@@ -209,7 +209,7 @@ void inode_init_once(struct inode *inode)
 
 EXPORT_SYMBOL(inode_init_once);
 
-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 inode * inode = (struct inode *) foo;
 
@@ -414,7 +414,8 @@ static void prune_icache(int nr_to_scan)
 			__iget(inode);
 			spin_unlock(&inode_lock);
 			if (remove_inode_buffers(inode))
-				reap += invalidate_inode_pages(&inode->i_data);
+				reap += invalidate_mapping_pages(&inode->i_data,
+								0, -1);
 			iput(inode);
 			spin_lock(&inode_lock);
 
@@ -709,7 +710,7 @@ EXPORT_SYMBOL(iunique);
 struct inode *igrab(struct inode *inode)
 {
 	spin_lock(&inode_lock);
-	if (!(inode->i_state & (I_FREEING|I_WILL_FREE)))
+	if (!(inode->i_state & (I_FREEING|I_CLEAR|I_WILL_FREE)))
 		__iget(inode);
 	else
 		/*
@@ -999,7 +1000,7 @@ EXPORT_SYMBOL(remove_inode_hash);
  */
 void generic_delete_inode(struct inode *inode)
 {
-	struct super_operations *op = inode->i_sb->s_op;
+	const struct super_operations *op = inode->i_sb->s_op;
 
 	list_del_init(&inode->i_list);
 	list_del_init(&inode->i_sb_list);
@@ -1092,7 +1093,7 @@ EXPORT_SYMBOL_GPL(generic_drop_inode);
  */
 static inline void iput_final(struct inode *inode)
 {
-	struct super_operations *op = inode->i_sb->s_op;
+	const struct super_operations *op = inode->i_sb->s_op;
 	void (*drop)(struct inode *) = generic_drop_inode;
 
 	if (op && op->drop_inode)
@@ -1112,7 +1113,7 @@ static inline void iput_final(struct inode *inode)
 void iput(struct inode *inode)
 {
 	if (inode) {
-		struct super_operations *op = inode->i_sb->s_op;
+		const struct super_operations *op = inode->i_sb->s_op;
 
 		BUG_ON(inode->i_state == I_CLEAR);
 
@@ -1144,7 +1145,6 @@ sector_t bmap(struct inode * inode, sector_t block)
 		res = inode->i_mapping->a_ops->bmap(inode->i_mapping, block);
 	return res;
 }
-
 EXPORT_SYMBOL(bmap);
 
 /**
@@ -1161,29 +1161,43 @@ void touch_atime(struct vfsmount *mnt, struct dentry *dentry)
 	struct inode *inode = dentry->d_inode;
 	struct timespec now;
 
-	if (IS_RDONLY(inode))
+	if (inode->i_flags & S_NOATIME)
 		return;
-
-	if ((inode->i_flags & S_NOATIME) ||
-	    (inode->i_sb->s_flags & MS_NOATIME) ||
-	    ((inode->i_sb->s_flags & MS_NODIRATIME) && S_ISDIR(inode->i_mode)))
+	if (IS_NOATIME(inode))
+		return;
+	if ((inode->i_sb->s_flags & MS_NODIRATIME) && S_ISDIR(inode->i_mode))
 		return;
 
 	/*
 	 * We may have a NULL vfsmount when coming from NFSD
 	 */
-	if (mnt &&
-	    ((mnt->mnt_flags & MNT_NOATIME) ||
-	     ((mnt->mnt_flags & MNT_NODIRATIME) && S_ISDIR(inode->i_mode))))
-		return;
+	if (mnt) {
+		if (mnt->mnt_flags & MNT_NOATIME)
+			return;
+		if ((mnt->mnt_flags & MNT_NODIRATIME) && S_ISDIR(inode->i_mode))
+			return;
 
-	now = current_fs_time(inode->i_sb);
-	if (!timespec_equal(&inode->i_atime, &now)) {
-		inode->i_atime = now;
-		mark_inode_dirty_sync(inode);
+		if (mnt->mnt_flags & MNT_RELATIME) {
+			/*
+			 * With relative atime, only update atime if the
+			 * previous atime is earlier than either the ctime or
+			 * mtime.
+			 */
+			if (timespec_compare(&inode->i_mtime,
+						&inode->i_atime) < 0 &&
+			    timespec_compare(&inode->i_ctime,
+						&inode->i_atime) < 0)
+				return;
+		}
 	}
-}
 
+	now = current_fs_time(inode->i_sb);
+	if (timespec_equal(&inode->i_atime, &now))
+		return;
+
+	inode->i_atime = now;
+	mark_inode_dirty_sync(inode);
+}
 EXPORT_SYMBOL(touch_atime);
 
 /**
@@ -1200,7 +1214,7 @@ EXPORT_SYMBOL(touch_atime);
 
 void file_update_time(struct file *file)
 {
-	struct inode *inode = file->f_dentry->d_inode;
+	struct inode *inode = file->f_path.dentry->d_inode;
 	struct timespec now;
 	int sync_it = 0;
 
@@ -1237,36 +1251,6 @@ int inode_needs_sync(struct inode *inode)
 
 EXPORT_SYMBOL(inode_needs_sync);
 
-/*
- *	Quota functions that want to walk the inode lists..
- */
-#ifdef CONFIG_QUOTA
-
-/* Function back in dquot.c */
-int remove_inode_dquot_ref(struct inode *, int, struct list_head *);
-
-void remove_dquot_ref(struct super_block *sb, int type,
-			struct list_head *tofree_head)
-{
-	struct inode *inode;
-
-	if (!sb->dq_op)
-		return;	/* nothing to do */
-	spin_lock(&inode_lock);	/* This lock is for inodes code */
-
-	/*
-	 * We don't have to lock against quota code - test IS_QUOTAINIT is
-	 * just for speedup...
-	 */
-	list_for_each_entry(inode, &sb->s_inodes, i_sb_list)
-		if (!IS_NOQUOTA(inode))
-			remove_inode_dquot_ref(inode, type, tofree_head);
-
-	spin_unlock(&inode_lock);
-}
-
-#endif
-
 int inode_wait(void *word)
 {
 	schedule();
@@ -1306,6 +1290,42 @@ void wake_up_inode(struct inode *inode)
 	wake_up_bit(&inode->i_state, __I_LOCK);
 }
 
+/*
+ * We rarely want to lock two inodes that do not have a parent/child
+ * relationship (such as directory, child inode) simultaneously. The
+ * vast majority of file systems should be able to get along fine
+ * without this. Do not use these functions except as a last resort.
+ */
+void inode_double_lock(struct inode *inode1, struct inode *inode2)
+{
+	if (inode1 == NULL || inode2 == NULL || inode1 == inode2) {
+		if (inode1)
+			mutex_lock(&inode1->i_mutex);
+		else if (inode2)
+			mutex_lock(&inode2->i_mutex);
+		return;
+	}
+
+	if (inode1 < inode2) {
+		mutex_lock_nested(&inode1->i_mutex, I_MUTEX_PARENT);
+		mutex_lock_nested(&inode2->i_mutex, I_MUTEX_CHILD);
+	} else {
+		mutex_lock_nested(&inode2->i_mutex, I_MUTEX_PARENT);
+		mutex_lock_nested(&inode1->i_mutex, I_MUTEX_CHILD);
+	}
+}
+EXPORT_SYMBOL(inode_double_lock);
+
+void inode_double_unlock(struct inode *inode1, struct inode *inode2)
+{
+	if (inode1)
+		mutex_unlock(&inode1->i_mutex);
+
+	if (inode2 && inode2 != inode1)
+		mutex_unlock(&inode2->i_mutex);
+}
+EXPORT_SYMBOL(inode_double_unlock);
+
 static __initdata unsigned long ihash_entries;
 static int __init set_ihash_entries(char *str)
 {