bsd/hfs/hfs_notification.c

   1 /*
   2  * Copyright (C) 2003 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * The contents of this file constitute Original Code as defined in and
   7  * are subject to the Apple Public Source License Version 1.1 (the
   8  * "License").  You may not use this file except in compliance with the
   9  * License.  Please obtain a copy of the License at
  10  * http://www.apple.com/publicsource and read it before using this file.
  11  *
  12  * This Original Code and all software distributed under the License are
  13  * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  14  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  15  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  16  * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
  17  * License for the specific language governing rights and limitations
  18  * under the License.
  19  *
  20  * @APPLE_LICENSE_HEADER_END@
  21  */
  22
  23 #include <sys/systm.h>
  24 #include <sys/kernel.h>
  25 #include <sys/file.h>
  26 #include <sys/dirent.h>
  27 #include <sys/stat.h>
  28 #include <sys/buf.h>
  29 #include <sys/mount.h>
  30 #include <sys/vnode.h>
  31 #include <sys/malloc.h>
  32 #include <sys/namei.h>
  33 #include <sys/ubc.h>
  34 #include <sys/quota.h>
  35
  36 #include <sys/kdebug.h>
  37
  38 #include "hfs.h"
  39 #include "hfs_catalog.h"
  40 #include "hfs_cnode.h"
  41 #include "hfs_lockf.h"
  42 #include "hfs_dbg.h"
  43 #include "hfs_mount.h"
  44 #include "hfs_quota.h"
  45 #include "hfs_endian.h"
  46
  47 #include "hfscommon/headers/BTreesInternal.h"
  48 #include "hfscommon/headers/FileMgrInternal.h"
  49
  50
  51
  52 void hfs_generate_volume_notifications(struct hfsmount *hfsmp) {
  53         ExtendedVCB *vcb = HFSTOVCB(hfsmp);
  54
  55         if (hfsmp->hfs_notification_conditions & VQ_LOWDISK) {
  56                 /* Check to see whether the free space is back above the minimal level: */
  57                 if (hfs_freeblks(hfsmp, 1) > hfsmp->hfs_freespace_notify_desiredlevel) {
  58             hfsmp->hfs_notification_conditions &= ~VQ_LOWDISK;
  59             vfs_event_signal(&HFSTOVFS(hfsmp)->mnt_stat.f_fsid, hfsmp->hfs_notification_conditions, NULL);
  60                 }
  61         } else {
  62                 /* Check to see whether the free space fell below the requested limit: */
  63                 if (hfs_freeblks(hfsmp, 1) < hfsmp->hfs_freespace_notify_warninglimit) {
  64             hfsmp->hfs_notification_conditions |= VQ_LOWDISK;
  65             vfs_event_signal(&HFSTOVFS(hfsmp)->mnt_stat.f_fsid, hfsmp->hfs_notification_conditions, NULL);
  66                 }
  67         };
  68 }