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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: Joel Becker <joel.becker@oracle.com>
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1 changed files with 18 additions and 0 deletions
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@ -220,6 +220,23 @@ static int dlmfs_file_release(struct inode *inode,
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return 0;
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}
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/*
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* We do ->setattr() just to override size changes. Our size is the size
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* of the LVB and nothing else.
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*/
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static int dlmfs_file_setattr(struct dentry *dentry, struct iattr *attr)
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{
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int error;
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struct inode *inode = dentry->d_inode;
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attr->ia_valid &= ~ATTR_SIZE;
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error = inode_change_ok(inode, attr);
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if (!error)
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error = inode_setattr(inode, attr);
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return error;
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}
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static unsigned int dlmfs_file_poll(struct file *file, poll_table *wait)
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{
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int event = 0;
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@ -634,6 +651,7 @@ static const struct super_operations dlmfs_ops = {
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static const struct inode_operations dlmfs_file_inode_operations = {
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.getattr = simple_getattr,
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.setattr = dlmfs_file_setattr,
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};
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static int dlmfs_get_sb(struct file_system_type *fs_type,
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