bsd/hfs/hfs_notification.c

   1 /*
   2  * Copyright (C) 2003, 2005 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_OSREFERENCE_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. The rights granted to you under the License
  10  * may not be used to create, or enable the creation or redistribution of,
  11  * unlawful or unlicensed copies of an Apple operating system, or to
  12  * circumvent, violate, or enable the circumvention or violation of, any
  13  * terms of an Apple operating system software license agreement.
  14  *
  15  * Please obtain a copy of the License at
  16  * http://www.opensource.apple.com/apsl/ and read it before using this file.
  17  *
  18  * The Original Code and all software distributed under the License are
  19  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  20  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  21  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  22  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  23  * Please see the License for the specific language governing rights and
  24  * limitations under the License.
  25  *
  26  * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
  27  */
  28
  29 #include <sys/systm.h>
  30 #include <sys/kernel.h>
  31 #include <sys/file.h>
  32 #include <sys/dirent.h>
  33 #include <sys/stat.h>
  34 #include <sys/mount.h>
  35 #include <sys/mount_internal.h>
  36 #include <sys/vnode.h>
  37 #include <sys/vnode_internal.h>
  38 #include <sys/malloc.h>
  39 #include <sys/ubc.h>
  40 #include <sys/quota.h>
  41
  42 #include <sys/kdebug.h>
  43
  44 #include "hfs.h"
  45 #include "hfs_catalog.h"
  46 #include "hfs_cnode.h"
  47 #include "hfs_dbg.h"
  48 #include "hfs_mount.h"
  49 #include "hfs_quota.h"
  50 #include "hfs_endian.h"
  51
  52 #include "hfscommon/headers/BTreesInternal.h"
  53 #include "hfscommon/headers/FileMgrInternal.h"
  54
  55
  56
  57 void hfs_generate_volume_notifications(struct hfsmount *hfsmp)
  58 {
  59         fsid_t fsid;
  60         u_int32_t freeblks, state=999;
  61
  62         fsid.val[0] = (long)hfsmp->hfs_raw_dev;
  63         fsid.val[1] = (long)vfs_typenum(HFSTOVFS(hfsmp));
  64
  65         freeblks = hfs_freeblks(hfsmp, 1);
  66
  67         if (freeblks < hfsmp->hfs_freespace_notify_dangerlimit) {
  68                 state = 2;
  69         } else if (freeblks < hfsmp->hfs_freespace_notify_warninglimit) {
  70                 state = 1;
  71         } else if (freeblks >= hfsmp->hfs_freespace_notify_desiredlevel) {
  72                 state = 0;
  73         }
  74
  75         if (state == 2 && !(hfsmp->hfs_notification_conditions & VQ_VERYLOWDISK)) {
  76                 /* Dump some logging to track down intermittent issues */
  77                 printf("HFS: Very Low Disk: freeblks: %d, dangerlimit: %d\n", freeblks, hfsmp->hfs_freespace_notify_dangerlimit);
  78 #if HFS_SPARSE_DEV
  79                 if (hfsmp->hfs_flags & HFS_HAS_SPARSE_DEVICE) {
  80                         if (hfsmp->hfs_backingfs_rootvp) {
  81                                 struct mount *mp = vnode_mount (hfsmp->hfs_backingfs_rootvp);
  82                                 /* If we're a sparse device, dump some info about the backing store... */
  83                                 if (mp) {
  84                                         printf("HFS: Very Low Disk: backingstore b_avail %lld, tag %d\n", mp->mnt_vfsstat.f_bavail, hfsmp->hfs_backingfs_rootvp->v_tag);
  85                                 }
  86                         }
  87                 }
  88 #endif
  89                 hfsmp->hfs_notification_conditions |= (VQ_VERYLOWDISK|VQ_LOWDISK);
  90                 vfs_event_signal(&fsid, hfsmp->hfs_notification_conditions, (intptr_t)NULL);
  91         } else if (state == 1) {
  92                 if (!(hfsmp->hfs_notification_conditions & VQ_LOWDISK)) {
  93                         printf("HFS: Low Disk: freeblks: %d, warninglimit: %d\n", freeblks, hfsmp->hfs_freespace_notify_warninglimit);
  94                         hfsmp->hfs_notification_conditions |= VQ_LOWDISK;
  95                         vfs_event_signal(&fsid, hfsmp->hfs_notification_conditions, (intptr_t)NULL);
  96                 } else if (hfsmp->hfs_notification_conditions & VQ_VERYLOWDISK) {
  97                         hfsmp->hfs_notification_conditions &= ~VQ_VERYLOWDISK;
  98                         vfs_event_signal(&fsid, hfsmp->hfs_notification_conditions, (intptr_t)NULL);
  99                 }
 100         } else if (state == 0) {
 101                 if (hfsmp->hfs_notification_conditions & (VQ_LOWDISK|VQ_VERYLOWDISK)) {
 102                         hfsmp->hfs_notification_conditions &= ~(VQ_VERYLOWDISK|VQ_LOWDISK);
 103                         if (hfsmp->hfs_notification_conditions == 0) {
 104                                 vfs_event_signal(&fsid, VQ_UPDATE, (intptr_t)NULL);
 105                         } else {
 106                                 vfs_event_signal(&fsid, hfsmp->hfs_notification_conditions, (intptr_t)NULL);
 107                         }
 108                 }
 109         }
 110 }