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Commit e8fce482 authored by Joel Becker's avatar Joel Becker
Browse files

ocfs2_dlmfs: Don't honor truncate. The size of a dlmfs file is LVB_LEN 



We want folks using dlmfs to be able to use the LVB in places other than
just write(2)/read(2).  By ignoring truncate requests, we allow 'echo
"contents" > /dlm/space/lockname' to work.

Signed-off-by: default avatarJoel Becker <joel.becker@oracle.com>
parent 553b5eb9

fs/ocfs2/dlmfs/dlmfs.c

+18 −0
Original line number Diff line number Diff line
@@ -220,6 +220,23 @@ static int dlmfs_file_release(struct inode *inode, 
	return 0;

}



/*

 * We do ->setattr() just to override size changes.  Our size is the size

 * of the LVB and nothing else.

 */

static int dlmfs_file_setattr(struct dentry *dentry, struct iattr *attr)

{

	int error;

	struct inode *inode = dentry->d_inode;



	attr->ia_valid &= ~ATTR_SIZE;

	error = inode_change_ok(inode, attr);

	if (!error)

		error = inode_setattr(inode, attr);



	return error;

}



static unsigned int dlmfs_file_poll(struct file *file, poll_table *wait)

{

	int event = 0;
@@ -634,6 +651,7 @@ static const struct super_operations dlmfs_ops = { 


static const struct inode_operations dlmfs_file_inode_operations = {

	.getattr	= simple_getattr,

	.setattr	= dlmfs_file_setattr,

};



static int dlmfs_get_sb(struct file_system_type *fs_type,