bsd/hfs/hfs_notification.c

   1 /*
   2  * Copyright (C) 2003 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * This file contains Original Code and/or Modifications of Original Code
   7  * as defined in and that are subject to the Apple Public Source License
   8  * Version 2.0 (the 'License'). You may not use this file except in
   9  * compliance with the License. Please obtain a copy of the License at
  10  * http://www.opensource.apple.com/apsl/ and read it before using this
  11  * file.
  12  *
  13  * The Original Code and all software distributed under the License are
  14  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  15  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  16  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  18  * Please see the License for the specific language governing rights and
  19  * limitations under the License.
  20  *
  21  * @APPLE_LICENSE_HEADER_END@
  22  */
  23
  24 #include <sys/systm.h>
  25 #include <sys/kernel.h>
  26 #include <sys/file.h>
  27 #include <sys/dirent.h>
  28 #include <sys/stat.h>
  29 #include <sys/mount.h>
  30 #include <sys/vnode.h>
  31 #include <sys/malloc.h>
  32 #include <sys/ubc.h>
  33 #include <sys/quota.h>
  34
  35 #include <sys/kdebug.h>
  36
  37 #include "hfs.h"
  38 #include "hfs_catalog.h"
  39 #include "hfs_cnode.h"
  40 #include "hfs_dbg.h"
  41 #include "hfs_mount.h"
  42 #include "hfs_quota.h"
  43 #include "hfs_endian.h"
  44
  45 #include "hfscommon/headers/BTreesInternal.h"
  46 #include "hfscommon/headers/FileMgrInternal.h"
  47
  48
  49
  50 void hfs_generate_volume_notifications(struct hfsmount *hfsmp) {
  51         ExtendedVCB *vcb = HFSTOVCB(hfsmp);
  52         fsid_t fsid;
  53
  54         fsid.val[0] = (long)hfsmp->hfs_raw_dev;
  55         fsid.val[1] = (long)vfs_typenum(HFSTOVFS(hfsmp));
  56
  57         if (hfsmp->hfs_notification_conditions & VQ_LOWDISK) {
  58                 /* Check to see whether the free space is back above the minimal level: */
  59                 if (hfs_freeblks(hfsmp, 1) > hfsmp->hfs_freespace_notify_desiredlevel) {
  60             hfsmp->hfs_notification_conditions &= ~VQ_LOWDISK;
  61             vfs_event_signal(&fsid, hfsmp->hfs_notification_conditions, NULL);
  62                 }
  63         } else {
  64                 /* Check to see whether the free space fell below the requested limit: */
  65                 if (hfs_freeblks(hfsmp, 1) < hfsmp->hfs_freespace_notify_warninglimit) {
  66             hfsmp->hfs_notification_conditions |= VQ_LOWDISK;
  67             vfs_event_signal(&fsid, hfsmp->hfs_notification_conditions, NULL);
  68                 }
  69         };
  70 }