1 files changed, 22 insertions, 0 deletions
diff --git a/fs/sysv/file.c b/fs/sysv/file.c
index 750cc22349b..0a65939508e 100644
--- a/fs/sysv/file.c
+++ b/fs/sysv/file.c
@@ -30,7 +30,29 @@ const struct file_operations sysv_file_operations = {
 	.splice_read	= generic_file_splice_read,
 };
 
+static int sysv_setattr(struct dentry *dentry, struct iattr *attr)
+{
+	struct inode *inode = dentry->d_inode;
+	int error;
+
+	error = inode_change_ok(inode, attr);
+	if (error)
+		return error;
+
+	if ((attr->ia_valid & ATTR_SIZE) &&
+	    attr->ia_size != i_size_read(inode)) {
+		error = vmtruncate(inode, attr->ia_size);
+		if (error)
+			return error;
+	}
+
+	setattr_copy(inode, attr);
+	mark_inode_dirty(inode);
+	return 0;
+}
+
 const struct inode_operations sysv_file_inode_operations = {
 	.truncate	= sysv_truncate,
+	.setattr	= sysv_setattr,
 	.getattr	= sysv_getattr,
 };