> > ATTR_MTIME is _only_ set in utime[s], which all filesystems want to
> > honor.
>
> ATTR_MTIME is set in both utimes and truncate.
Not in truncate:
int do_truncate(struct dentry *dentry, loff_t length)
{
/* ... */
newattrs.ia_size = length;
newattrs.ia_valid = ATTR_SIZE | ATTR_CTIME;
down(&dentry->d_inode->i_sem);
err = notify_change(dentry, &newattrs);
up(&dentry->d_inode->i_sem);
return err;
}
> As for ATTR_CTIME, that is also set in chown(), chmod(). It too can be
> optimised away for those operations, assuming that CIFS servers
> automatically update ctime.
Yes, I realized this shortly after posting.
Miklos
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