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
57void 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}
134