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/* Notifications of directory changes.
Copyright (C) 1994, 1995, 1998, 2001 Free Software Foundation, Inc.
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License as
published by the Free Software Foundation; either version 2, or (at
your option) any later version.
This program is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
#include "priv.h"
#include "fs_S.h"
#include "fs_notify_U.h"
kern_return_t
diskfs_S_dir_notice_changes (struct protid *cred,
mach_port_t notify)
{
error_t err;
struct modreq *req;
struct node *np;
if (!cred)
return EOPNOTSUPP;
np = cred->po->np;
pthread_mutex_lock (&np->lock);
if (!S_ISDIR (np->dn_stat.st_mode))
{
pthread_mutex_unlock (&np->lock);
return ENOTDIR;
}
err = dir_changed (notify, np->dirmod_tick, DIR_CHANGED_NULL, "");
if (err)
{
pthread_mutex_unlock (&np->lock);
return err;
}
req = malloc (sizeof (struct modreq));
if (! req)
{
pthread_mutex_unlock (&np->lock);
return ENOMEM;
}
req->port = notify;
req->next = np->dirmod_reqs;
np->dirmod_reqs = req;
pthread_mutex_unlock (&np->lock);
return 0;
}
void
diskfs_notice_dirchange (struct node *dp, enum dir_changed_type type,
const char *name)
{
error_t err;
struct modreq **preq;
dp->dirmod_tick++;
preq = &dp->dirmod_reqs;
while (*preq)
{
struct modreq *req = *preq;
err = dir_changed (req->port, dp->dirmod_tick, type, name);
if (err && err != MACH_SEND_TIMED_OUT)
{
/* Remove notify port. */
*preq = req->next;
mach_port_deallocate (mach_task_self (), req->port);
free (req);
}
else
preq = &req->next;
}
}
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