Looks good,
Reviewed-by: Christoph Hellwig <hch@xxxxxx>
Some comments on further work I'd like to see in this area, though:
> + spin_lock(&inode->i_lock);
> + time_out_leases(inode);
> for (before = &inode->i_flock;
> ((fl = *before) != NULL) && IS_LEASE(fl);
> before = &fl->fl_next) {
> if (fl->fl_file != filp)
> continue;
> - return fl->fl_lmops->lm_change(before, F_UNLCK);
> + error = fl->fl_lmops->lm_change(before, F_UNLCK);
> }
We really should split a lm_release from lm_change, the way it is
used is highly confusing. In addition I think a lot of code
currently in lease_modify should move here instead, e.g. something like:
if (fl->fl_file != filp)
continue;
fl = *before;
fl->fl_type = F_UNLCK;
lease_clear_pending(fl, F_UNLCK);
locks_wake_up_blocks(fl);
if (fl->fl_lmops->lm_delete)
fl->fl_lmops->lm_delete(fl);
locks_delete_lock(before, NULL);
with lm_delete for user space leases as:
static void lease_delete(struct file_lock *fl)
{
struct file *filp = fl->fl_file;
f_delown(filp);
filp->f_owner.signum = 0;
fasync_helper(0, fl->fl_file, 0, &fl->fl_fasync);
if (fl->fl_fasync != NULL) {
printk(KERN_ERR "locks_delete_lock: fasync == %p\n",
fl->fl_fasync);
fl->fl_fasync = NULL;
}
}
and a NULL implementation for delegations.
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