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/mount.h>
  29 #include <sys/vnode.h>
  30 #include <sys/malloc.h>
  31 #include <sys/ubc.h>
  32 #include <sys/quota.h>
  33
  34 #include <sys/kdebug.h>
  35
  36 #include "hfs.h"
  37 #include "hfs_catalog.h"
  38 #include "hfs_cnode.h"
  39 #include "hfs_dbg.h"
  40 #include "hfs_mount.h"
  41 #include "hfs_quota.h"
  42 #include "hfs_endian.h"
  43
  44 #include "hfscommon/headers/BTreesInternal.h"
  45 #include "hfscommon/headers/FileMgrInternal.h"
  46
  47
  48
  49 void hfs_generate_volume_notifications(struct hfsmount *hfsmp) {
  50         ExtendedVCB *vcb = HFSTOVCB(hfsmp);
  51         fsid_t fsid;
  52
  53         fsid.val[0] = (long)hfsmp->hfs_raw_dev;
  54         fsid.val[1] = (long)vfs_typenum(HFSTOVFS(hfsmp));
  55
  56         if (hfsmp->hfs_notification_conditions & VQ_LOWDISK) {
  57                 /* Check to see whether the free space is back above the minimal level: */
  58                 if (hfs_freeblks(hfsmp, 1) > hfsmp->hfs_freespace_notify_desiredlevel) {
  59             hfsmp->hfs_notification_conditions &= ~VQ_LOWDISK;
  60             vfs_event_signal(&fsid, hfsmp->hfs_notification_conditions, NULL);
  61                 }
  62         } else {
  63                 /* Check to see whether the free space fell below the requested limit: */
  64                 if (hfs_freeblks(hfsmp, 1) < hfsmp->hfs_freespace_notify_warninglimit) {
  65             hfsmp->hfs_notification_conditions |= VQ_LOWDISK;
  66             vfs_event_signal(&fsid, hfsmp->hfs_notification_conditions, NULL);
  67                 }
  68         };
  69 }