--- /dev/null
+/*
+ * Copyright (C) 2003-2015 Apple Inc. All rights reserved.
+ *
+ * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
+ *
+ * This file contains Original Code and/or Modifications of Original Code
+ * as defined in and that are subject to the Apple Public Source License
+ * Version 2.0 (the 'License'). You may not use this file except in
+ * compliance with the License. The rights granted to you under the License
+ * may not be used to create, or enable the creation or redistribution of,
+ * unlawful or unlicensed copies of an Apple operating system, or to
+ * circumvent, violate, or enable the circumvention or violation of, any
+ * terms of an Apple operating system software license agreement.
+ *
+ * Please obtain a copy of the License at
+ * http://www.opensource.apple.com/apsl/ and read it before using this file.
+ *
+ * The Original Code and all software distributed under the License are
+ * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
+ * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
+ * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
+ * Please see the License for the specific language governing rights and
+ * limitations under the License.
+ *
+ * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
+ */
+
+#include <sys/systm.h>
+#include <sys/kernel.h>
+#include <sys/file.h>
+#include <sys/dirent.h>
+#include <sys/stat.h>
+#include <sys/mount.h>
+#include <sys/vnode.h>
+#include <sys/malloc.h>
+#include <sys/ubc.h>
+#include <sys/quota.h>
+
+#include <sys/kdebug.h>
+
+#include "hfs.h"
+#include "hfs_catalog.h"
+#include "hfs_cnode.h"
+#include "hfs_dbg.h"
+#include "hfs_mount.h"
+#include "hfs_quota.h"
+#include "hfs_endian.h"
+
+#include "BTreesInternal.h"
+#include "FileMgrInternal.h"
+
+
+
+void hfs_generate_volume_notifications(struct hfsmount *hfsmp)
+{
+ fsid_t fsid;
+ u_int32_t freeblks, state=999;
+
+ /* Do not generate low disk notifications for read-only volumes */
+ if (hfsmp->hfs_flags & HFS_READ_ONLY) {
+ return;
+ }
+
+ fsid.val[0] = hfsmp->hfs_raw_dev;
+ fsid.val[1] = vfs_typenum(HFSTOVFS(hfsmp));
+
+ freeblks = hfs_freeblks(hfsmp, 1);
+
+ /*
+ * Find the theshold the number of free blocks fits into.
+ * We fire upon reaching a level below desired only once,
+ * except for when we reach the low disk or near low disk levels
+ * from below, in which case we do not fire unless we have also
+ * reached the desired disk level (hysteresis).
+ * This is illustrated in the following diagram:
+ *
+ * fire ^
+ * --------- desired level
+ * |
+ *
+ *
+ * |
+ * --------- near low disk level
+ * fire v
+ *
+ *
+ * |
+ * --------- low disk level
+ * fire v
+ *
+ *
+ * | ^ fire
+ * --------- very low disk level
+ * fire v |
+ *
+ */
+ if (freeblks < hfsmp->hfs_freespace_notify_dangerlimit) {
+ state = 4;
+ } else if (freeblks < hfsmp->hfs_freespace_notify_warninglimit) {
+ state = 3;
+ } else if (freeblks < hfsmp->hfs_freespace_notify_nearwarninglimit) {
+ state = 2;
+ } else if (freeblks < hfsmp->hfs_freespace_notify_desiredlevel) {
+ /* We are between the near low disk and desired levels */
+ state = 1;
+ } else if (freeblks >= hfsmp->hfs_freespace_notify_desiredlevel) {
+ state = 0;
+ }
+
+ /* Free blocks are less than dangerlimit for the first time */
+ if (state == 4 && !(hfsmp->hfs_notification_conditions & VQ_VERYLOWDISK)) {
+ /* Dump some logging to track down intermittent issues */
+ printf("hfs: set VeryLowDisk: vol:%s, freeblks:%d, dangerlimit:%d\n", hfsmp->vcbVN, freeblks, hfsmp->hfs_freespace_notify_dangerlimit);
+
+#if HFS_SPARSE_DEV
+ // If we're a sparse device, dump some info about the backing store..
+ hfs_lock_mount(hfsmp);
+ vnode_t backing_vp = hfsmp->hfs_backingvp;
+ if (backing_vp && vnode_get(backing_vp) != 0)
+ backing_vp = NULL;
+ hfs_unlock_mount(hfsmp);
+
+ if (backing_vp) {
+ struct vfsstatfs *sfs = vfs_statfs(vnode_mount(backing_vp));
+ printf("hfs: set VeryLowDisk: vol:%s, backingstore b_avail:%lld, tag:%d\n",
+ hfsmp->vcbVN, sfs->f_bavail, vnode_tag(backing_vp));
+ vnode_put(backing_vp);
+ }
+#endif
+
+ hfsmp->hfs_notification_conditions |= (VQ_VERYLOWDISK|VQ_LOWDISK|VQ_NEARLOWDISK);
+ vfs_event_signal(&fsid, hfsmp->hfs_notification_conditions, (intptr_t)NULL);
+ } else if (state == 3) {
+ /* Free blocks are less than warning limit for the first time */
+ if (!(hfsmp->hfs_notification_conditions & VQ_LOWDISK)) {
+ printf("hfs: set LowDisk: vol:%s, freeblks:%d, warninglimit:%d\n", hfsmp->vcbVN, freeblks, hfsmp->hfs_freespace_notify_warninglimit);
+ hfsmp->hfs_notification_conditions |= (VQ_LOWDISK|VQ_NEARLOWDISK);
+ vfs_event_signal(&fsid, hfsmp->hfs_notification_conditions, (intptr_t)NULL);
+ } else if (hfsmp->hfs_notification_conditions & VQ_VERYLOWDISK) {
+ /* Free blocks count has increased from danger limit to warning limit, so just clear VERYLOWDISK warning */
+ printf("hfs: clear VeryLowDisk: vol:%s, freeblks:%d, dangerlimit:%d\n", hfsmp->vcbVN, freeblks, hfsmp->hfs_freespace_notify_dangerlimit);
+ hfsmp->hfs_notification_conditions &= ~VQ_VERYLOWDISK;
+ vfs_event_signal(&fsid, hfsmp->hfs_notification_conditions, (intptr_t)NULL);
+ }
+ } else if (state == 2) {
+ /* Free blocks are less than the near warning limit for the first time */
+ if (!(hfsmp->hfs_notification_conditions & VQ_NEARLOWDISK)) {
+ printf("hfs: set NearLowDisk: vol:%s, freeblks:%d, nearwarninglimit:%d\n", hfsmp->vcbVN, freeblks,
+ hfsmp->hfs_freespace_notify_nearwarninglimit);
+
+ hfsmp->hfs_notification_conditions |= VQ_NEARLOWDISK;
+ vfs_event_signal(&fsid, hfsmp->hfs_notification_conditions, (intptr_t)NULL);
+ } else {
+ /* Free blocks count has increased from warning/danger limit to near warning limit,
+ * so clear VERYLOWDISK / LOWDISK warnings, and signal if we clear VERYLOWDISK */
+ hfsmp->hfs_notification_conditions &= ~VQ_LOWDISK;
+ if (hfsmp->hfs_notification_conditions & VQ_VERYLOWDISK) {
+ printf("hfs: clear VeryLowDisk: vol:%s, freeblks:%d, dangerlimit:%d\n", hfsmp->vcbVN, freeblks,
+ hfsmp->hfs_freespace_notify_dangerlimit);
+
+ hfsmp->hfs_notification_conditions &= ~VQ_VERYLOWDISK;
+ vfs_event_signal(&fsid, hfsmp->hfs_notification_conditions, (intptr_t)NULL);
+ }
+ }
+ } else if (state == 1) {
+ /* Free blocks are less than the desireable level, but more than the near warning level
+ * In this case, we may have to notify if we were previously underneath the danger limit */
+ if (hfsmp->hfs_notification_conditions & VQ_VERYLOWDISK) {
+ printf("hfs: clear VeryLowDisk: vol:%s, freeblks:%d, dangerlimit:%d\n", hfsmp->vcbVN, freeblks,
+ hfsmp->hfs_freespace_notify_dangerlimit);
+
+ hfsmp->hfs_notification_conditions &= ~VQ_VERYLOWDISK;
+ vfs_event_signal(&fsid, hfsmp->hfs_notification_conditions, (intptr_t)NULL);
+ }
+ } else if (state == 0) {
+ /* Free blocks count has increased to desirable level, so clear all conditions */
+ if (hfsmp->hfs_notification_conditions & (VQ_NEARLOWDISK|VQ_LOWDISK|VQ_VERYLOWDISK)) {
+ if (hfsmp->hfs_notification_conditions & VQ_NEARLOWDISK) {
+ printf("hfs: clear NearLowDisk: vol:%s, freeblks:%d, nearwarninglimit:%d, desiredlevel:%d\n", hfsmp->vcbVN,
+ freeblks, hfsmp->hfs_freespace_notify_nearwarninglimit, hfsmp->hfs_freespace_notify_desiredlevel);
+ }
+ if (hfsmp->hfs_notification_conditions & VQ_LOWDISK) {
+ printf("hfs: clear LowDisk: vol:%s, freeblks:%d, warninglimit:%d, desiredlevel:%d\n", hfsmp->vcbVN, freeblks,
+ hfsmp->hfs_freespace_notify_warninglimit, hfsmp->hfs_freespace_notify_desiredlevel);
+ }
+ if (hfsmp->hfs_notification_conditions & VQ_VERYLOWDISK) {
+ printf("hfs: clear VeryLowDisk: vol:%s, freeblks:%d, dangerlimit:%d\n", hfsmp->vcbVN, freeblks, hfsmp->hfs_freespace_notify_warninglimit);
+ }
+ hfsmp->hfs_notification_conditions &= ~(VQ_VERYLOWDISK|VQ_LOWDISK|VQ_NEARLOWDISK);
+ if (hfsmp->hfs_notification_conditions == 0) {
+ vfs_event_signal(&fsid, VQ_UPDATE|VQ_DESIRED_DISK, (intptr_t)NULL);
+ } else {
+ vfs_event_signal(&fsid, hfsmp->hfs_notification_conditions, (intptr_t)NULL);
+ }
+ }
+ }
+}
projects / apple / hfs.git / blobdiff