From: Erez Zadok <ezk@cs.sunysb.edu>
Date: Fri, 13 May 2022 23:41:26 +0000 (-0400)
Subject: Wrapfs: add ->bmap support
X-Git-Url: https://git.fsl.cs.sunysb.edu/?a=commitdiff_plain;h=refs%2Fheads%2Fwrapfs;p=wrapfs-2.6.37.y.git

Wrapfs: add ->bmap support

Signed-off-by: Aditya Sonavane <aditya.sonavane@stonybrook.edu>
Signed-off-by: Erez Zadok <ezk@cs.stonybrook.edu>
---

diff --git a/fs/wrapfs/mmap.c b/fs/wrapfs/mmap.c
index 3f25de04da8d..e5f0cd0371d4 100644
--- a/fs/wrapfs/mmap.c
+++ b/fs/wrapfs/mmap.c
@@ -84,8 +84,23 @@ static ssize_t wrapfs_direct_IO(int rw, struct kiocb *iocb,
 	return -EINVAL;
 }
 
+static sector_t wrapfs_bmap(struct address_space *mapping, sector_t block)
+{
+	int err = 0;
+	struct inode *inode;
+	struct inode *lower_inode;
+
+	inode = (struct inode *) mapping->host;
+	lower_inode = wrapfs_lower_inode(inode);
+	if (lower_inode->i_mapping->a_ops->bmap)
+		err = lower_inode->i_mapping->a_ops->bmap(lower_inode->i_mapping,
+							  block);
+	return err;
+}
+
 const struct address_space_operations wrapfs_aops = {
 	.direct_IO = wrapfs_direct_IO,
+	.bmap = wrapfs_bmap,
 };
 
 const struct vm_operations_struct wrapfs_vm_ops = {