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         char *volname = NULL;
  62
  63         if (hfsmp->vcbVN) {
  64                 if (strlen((char*)hfsmp->vcbVN) < 256) {
  65                         volname = (char*) hfsmp->vcbVN;
  66                 }
  67         }
  68
  69         fsid.val[0] = (long)hfsmp->hfs_raw_dev;
  70         fsid.val[1] = (long)vfs_typenum(HFSTOVFS(hfsmp));
  71
  72         freeblks = hfs_freeblks(hfsmp, 1);
  73
  74         if (freeblks < hfsmp->hfs_freespace_notify_dangerlimit) {
  75                 state = 2;
  76         } else if (freeblks < hfsmp->hfs_freespace_notify_warninglimit) {
  77                 state = 1;
  78         } else if (freeblks >= hfsmp->hfs_freespace_notify_desiredlevel) {
  79                 state = 0;
  80         }
  81
  82         if (state == 2 && !(hfsmp->hfs_notification_conditions & VQ_VERYLOWDISK)) {
  83                 /* Dump some logging to track down intermittent issues */
  84                 if (volname) {
  85                         printf("HFS: Vol: %s Very Low Disk: freeblks: %d, dangerlimit: %d\n", volname, freeblks, hfsmp->hfs_freespace_notify_dangerlimit);
  86                 }
  87                 else {
  88                         printf("HFS: Very Low Disk: freeblks: %d, dangerlimit: %d\n", freeblks, hfsmp->hfs_freespace_notify_dangerlimit);
  89                 }
  90
  91 #if HFS_SPARSE_DEV
  92                 if (hfsmp->hfs_flags & HFS_HAS_SPARSE_DEVICE) {
  93                         if (hfsmp->hfs_backingfs_rootvp) {
  94                                 struct mount *mp = vnode_mount (hfsmp->hfs_backingfs_rootvp);
  95                                 /* If we're a sparse device, dump some info about the backing store... */
  96                                 if (mp) {
  97                                         if (volname) {
  98                                                 printf("HFS: Vol: %s Very Low Disk: backingstore b_avail %lld, tag %d\n", volname, mp->mnt_vfsstat.f_bavail, hfsmp->hfs_backingfs_rootvp->v_tag);
  99                                         }
 100                                         else {
 101                                                 printf("HFS: Very Low Disk: backingstore b_avail %lld, tag %d\n", mp->mnt_vfsstat.f_bavail, hfsmp->hfs_backingfs_rootvp->v_tag);
 102                                         }
 103                                 }
 104                         }
 105                 }
 106 #endif
 107                 hfsmp->hfs_notification_conditions |= (VQ_VERYLOWDISK|VQ_LOWDISK);
 108                 vfs_event_signal(&fsid, hfsmp->hfs_notification_conditions, (intptr_t)NULL);
 109         } else if (state == 1) {
 110                 if (!(hfsmp->hfs_notification_conditions & VQ_LOWDISK)) {
 111                         if (volname) {
 112                                 printf("HFS: Low Disk: Vol: %s freeblks: %d, warninglimit: %d\n", volname, freeblks, hfsmp->hfs_freespace_notify_warninglimit);
 113                         }
 114                         else {
 115                                 printf("HFS: Low Disk: freeblks: %d, warninglimit: %d\n", freeblks, hfsmp->hfs_freespace_notify_warninglimit);
 116                         }
 117                         hfsmp->hfs_notification_conditions |= VQ_LOWDISK;
 118                         vfs_event_signal(&fsid, hfsmp->hfs_notification_conditions, (intptr_t)NULL);
 119                 } else if (hfsmp->hfs_notification_conditions & VQ_VERYLOWDISK) {
 120                         hfsmp->hfs_notification_conditions &= ~VQ_VERYLOWDISK;
 121                         vfs_event_signal(&fsid, hfsmp->hfs_notification_conditions, (intptr_t)NULL);
 122                 }
 123         } else if (state == 0) {
 124                 if (hfsmp->hfs_notification_conditions & (VQ_LOWDISK|VQ_VERYLOWDISK)) {
 125                         hfsmp->hfs_notification_conditions &= ~(VQ_VERYLOWDISK|VQ_LOWDISK);
 126                         if (hfsmp->hfs_notification_conditions == 0) {
 127                                 vfs_event_signal(&fsid, VQ_UPDATE, (intptr_t)NULL);
 128                         } else {
 129                                 vfs_event_signal(&fsid, hfsmp->hfs_notification_conditions, (intptr_t)NULL);
 130                         }
 131                 }
 132         }
 133 }