Track metadata bhs for an inode in fs-private part of the inode.

Signed-off-by: Jan Kara <jack@suse.cz>
---
 fs/ext2/ext2.h    | 2 ++
 fs/ext2/file.c    | 1 +
 fs/ext2/namei.c   | 2 ++
 fs/ext2/super.c   | 6 ++++++
 fs/ext2/symlink.c | 2 ++
 5 files changed, 13 insertions(+)

diff --git a/fs/ext2/ext2.h b/fs/ext2/ext2.h
index 5e0c6c5fcb6c..2b6593ba107f 100644
--- a/fs/ext2/ext2.h
+++ b/fs/ext2/ext2.h
@@ -676,6 +676,7 @@ struct ext2_inode_info {
 #ifdef CONFIG_QUOTA
 	struct dquot __rcu *i_dquot[MAXQUOTAS];
 #endif
+	struct mapping_metadata_bhs i_metadata_bhs;
 };
 
 /*
@@ -766,6 +767,7 @@ void ext2_msg(struct super_block *, const char *, const char *, ...);
 extern void ext2_update_dynamic_rev (struct super_block *sb);
 extern void ext2_sync_super(struct super_block *sb, struct ext2_super_block *es,
 			    int wait);
+struct mapping_metadata_bhs *ext2_get_metadata_bhs(struct inode *inode);
 
 /*
  * Inodes and files operations
diff --git a/fs/ext2/file.c b/fs/ext2/file.c
index ebe356a38b18..2dbf3e7c2e9c 100644
--- a/fs/ext2/file.c
+++ b/fs/ext2/file.c
@@ -338,4 +338,5 @@ const struct inode_operations ext2_file_inode_operations = {
 	.fiemap		= ext2_fiemap,
 	.fileattr_get	= ext2_fileattr_get,
 	.fileattr_set	= ext2_fileattr_set,
+	.get_metadata_bhs = ext2_get_metadata_bhs,
 };
diff --git a/fs/ext2/namei.c b/fs/ext2/namei.c
index bde617a66cec..70c94adce837 100644
--- a/fs/ext2/namei.c
+++ b/fs/ext2/namei.c
@@ -422,6 +422,7 @@ const struct inode_operations ext2_dir_inode_operations = {
 	.tmpfile	= ext2_tmpfile,
 	.fileattr_get	= ext2_fileattr_get,
 	.fileattr_set	= ext2_fileattr_set,
+	.get_metadata_bhs = ext2_get_metadata_bhs,
 };
 
 const struct inode_operations ext2_special_inode_operations = {
@@ -430,4 +431,5 @@ const struct inode_operations ext2_special_inode_operations = {
 	.setattr	= ext2_setattr,
 	.get_inode_acl	= ext2_get_acl,
 	.set_acl	= ext2_set_acl,
+	.get_metadata_bhs = ext2_get_metadata_bhs,
 };
diff --git a/fs/ext2/super.c b/fs/ext2/super.c
index 603f2641fe10..503c25cae27c 100644
--- a/fs/ext2/super.c
+++ b/fs/ext2/super.c
@@ -215,6 +215,7 @@ static struct inode *ext2_alloc_inode(struct super_block *sb)
 #ifdef CONFIG_QUOTA
 	memset(&ei->i_dquot, 0, sizeof(ei->i_dquot));
 #endif
+	mmb_init(&ei->i_metadata_bhs);
 
 	return &ei->vfs_inode;
 }
@@ -259,6 +260,11 @@ static void destroy_inodecache(void)
 	kmem_cache_destroy(ext2_inode_cachep);
 }
 
+struct mapping_metadata_bhs *ext2_get_metadata_bhs(struct inode *inode)
+{
+	return &EXT2_I(inode)->i_metadata_bhs;
+}
+
 static int ext2_show_options(struct seq_file *seq, struct dentry *root)
 {
 	struct super_block *sb = root->d_sb;
diff --git a/fs/ext2/symlink.c b/fs/ext2/symlink.c
index 948d3a441403..c82a15d28772 100644
--- a/fs/ext2/symlink.c
+++ b/fs/ext2/symlink.c
@@ -26,6 +26,7 @@ const struct inode_operations ext2_symlink_inode_operations = {
 	.getattr	= ext2_getattr,
 	.setattr	= ext2_setattr,
 	.listxattr	= ext2_listxattr,
+	.get_metadata_bhs = ext2_get_metadata_bhs,
 };
  
 const struct inode_operations ext2_fast_symlink_inode_operations = {
@@ -33,4 +34,5 @@ const struct inode_operations ext2_fast_symlink_inode_operations = {
 	.getattr	= ext2_getattr,
 	.setattr	= ext2_setattr,
 	.listxattr	= ext2_listxattr,
+	.get_metadata_bhs = ext2_get_metadata_bhs,
 };
-- 
2.51.0