ext2: Track metadata bhs in fs-private inode part

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

Signed-off-by: Jan Kara <jack@suse.cz>
Link: https://patch.msgid.link/20260326095354.16340-76-jack@suse.cz
Signed-off-by: Christian Brauner <brauner@kernel.org>

Author: jankara

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;
 };
 
 /*

fs/ext2/file.c

@@ -156,9 +156,11 @@ static int ext2_release_file (struct inode * inode, struct file * filp)
 int ext2_fsync(struct file *file, loff_t start, loff_t end, int datasync)
 {
 	int ret;
-	struct super_block *sb = file->f_mapping->host->i_sb;
+	struct inode *inode = file->f_mapping->host;
+	struct super_block *sb = inode->i_sb;
 
-	ret = generic_buffers_fsync(file, start, end, datasync);
+	ret = mmb_fsync(file, &EXT2_I(inode)->i_metadata_bhs,
+			start, end, datasync);
 	if (ret == -EIO)
 		/* We don't really know where the IO error happened... */
 		ext2_error(sb, __func__,

fs/ext2/inode.c

@@ -95,9 +95,9 @@ void ext2_evict_inode(struct inode * inode)
 			ext2_truncate_blocks(inode, 0);
 		ext2_xattr_delete_inode(inode);
 	} else {
-		sync_mapping_buffers(&inode->i_data);
+		mmb_sync(&EXT2_I(inode)->i_metadata_bhs);
 	}
-	invalidate_inode_buffers(inode);
+	mmb_invalidate(&EXT2_I(inode)->i_metadata_bhs);
 	clear_inode(inode);
 
 	ext2_discard_reservation(inode);
@@ -527,7 +527,7 @@ static int ext2_alloc_branch(struct inode *inode,
 		}
 		set_buffer_uptodate(bh);
 		unlock_buffer(bh);
-		mark_buffer_dirty_inode(bh, inode);
+		mmb_mark_buffer_dirty(bh, &EXT2_I(inode)->i_metadata_bhs);
 		/* We used to sync bh here if IS_SYNC(inode).
 		 * But we now rely upon generic_write_sync()
 		 * and b_inode_buffers.  But not for directories.
@@ -598,7 +598,7 @@ static void ext2_splice_branch(struct inode *inode,
 
 	/* had we spliced it onto indirect block? */
 	if (where->bh)
-		mark_buffer_dirty_inode(where->bh, inode);
+		mmb_mark_buffer_dirty(where->bh, &EXT2_I(inode)->i_metadata_bhs);
 
 	inode_set_ctime_current(inode);
 	mark_inode_dirty(inode);
@@ -1211,7 +1211,8 @@ static void __ext2_truncate_blocks(struct inode *inode, loff_t offset)
 		if (partial == chain)
 			mark_inode_dirty(inode);
 		else
-			mark_buffer_dirty_inode(partial->bh, inode);
+			mmb_mark_buffer_dirty(partial->bh,
+					      &EXT2_I(inode)->i_metadata_bhs);
 		ext2_free_branches(inode, &nr, &nr+1, (chain+n-1) - partial);
 	}
 	/* Clear the ends of indirect blocks on the shared branch */
@@ -1220,7 +1221,8 @@ static void __ext2_truncate_blocks(struct inode *inode, loff_t offset)
 				   partial->p + 1,
 				   (__le32*)partial->bh->b_data+addr_per_block,
 				   (chain+n-1) - partial);
-		mark_buffer_dirty_inode(partial->bh, inode);
+		mmb_mark_buffer_dirty(partial->bh,
+				      &EXT2_I(inode)->i_metadata_bhs);
 		brelse (partial->bh);
 		partial--;
 	}
@@ -1303,7 +1305,7 @@ static int ext2_setsize(struct inode *inode, loff_t newsize)
 
 	inode_set_mtime_to_ts(inode, inode_set_ctime_current(inode));
 	if (inode_needs_sync(inode)) {
-		sync_mapping_buffers(inode->i_mapping);
+		mmb_sync(&EXT2_I(inode)->i_metadata_bhs);
 		sync_inode_metadata(inode, 1);
 	} else {
 		mark_inode_dirty(inode);

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, &ei->vfs_inode.i_data);
 
 	return &ei->vfs_inode;
 }