xnu-2782.40.9.tar.gz

[apple/xnu.git] / bsd / hfs / hfs_notification.c

diff --git a/bsd/hfs/hfs_notification.c b/bsd/hfs/hfs_notification.c
index 094102c62ee17317ab1f1deda17a843d65ec8001..621c58de56ccd501321d2498e98d8c1f3a95bcda 100644 (file)
--- a/bsd/hfs/hfs_notification.c
+++ b/bsd/hfs/hfs_notification.c
@@ -1,14 +1,19 @@
 /*
 /*

- * Copyright (C) 2003 Apple Computer, Inc. All rights reserved.
+ * Copyright (C) 2003, 2005 Apple Computer, Inc. All rights reserved.

  *
  *

- * @APPLE_LICENSE_HEADER_START@
+ * @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
  * 
  * 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. Please obtain a copy of the License at
- * http://www.opensource.apple.com/apsl/ and read it before using this
- * file.
+ * 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
  * 
  * The Original Code and all software distributed under the License are
  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER


@@ -18,7 +23,7 @@
  * Please see the License for the specific language governing rights and
  * limitations under the License.
  * 
  * Please see the License for the specific language governing rights and
  * limitations under the License.
  * 

- * @APPLE_LICENSE_HEADER_END@
+ * @APPLE_OSREFERENCE_LICENSE_HEADER_END@

  */
 
 #include <sys/systm.h>
  */
 
 #include <sys/systm.h>


@@ -27,7 +32,9 @@
 #include <sys/dirent.h>
 #include <sys/stat.h>
 #include <sys/mount.h>
 #include <sys/dirent.h>
 #include <sys/stat.h>
 #include <sys/mount.h>

+#include <sys/mount_internal.h>

 #include <sys/vnode.h>
 #include <sys/vnode.h>

+#include <sys/vnode_internal.h>

 #include <sys/malloc.h>
 #include <sys/ubc.h>
 #include <sys/quota.h>
 #include <sys/malloc.h>
 #include <sys/ubc.h>
 #include <sys/quota.h>


@@ -47,24 +54,79 @@
 
 
 
 
 
 

-void hfs_generate_volume_notifications(struct hfsmount *hfsmp) {
-       ExtendedVCB *vcb = HFSTOVCB(hfsmp);
+void hfs_generate_volume_notifications(struct hfsmount *hfsmp) 
+{

        fsid_t fsid;
        fsid_t fsid;

-               
-       fsid.val[0] = (long)hfsmp->hfs_raw_dev;
-       fsid.val[1] = (long)vfs_typenum(HFSTOVFS(hfsmp));
+       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));

        
        

-       if (hfsmp->hfs_notification_conditions & VQ_LOWDISK) {
-               /* Check to see whether the free space is back above the minimal level: */
-               if (hfs_freeblks(hfsmp, 1) > hfsmp->hfs_freespace_notify_desiredlevel) {
-            hfsmp->hfs_notification_conditions &= ~VQ_LOWDISK;
-            vfs_event_signal(&fsid, hfsmp->hfs_notification_conditions, NULL);
+       freeblks = hfs_freeblks(hfsmp, 1);
+
+       if (freeblks < hfsmp->hfs_freespace_notify_dangerlimit) {
+               state = 2;
+       } else if (freeblks < hfsmp->hfs_freespace_notify_warninglimit) {
+               state = 1;
+       } else if (freeblks >= hfsmp->hfs_freespace_notify_desiredlevel) {
+               state = 0;
+       }
+
+       /* Free blocks are less than dangerlimit for the first time */
+       if (state == 2 && !(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_backingfs_rootvp;
+               if (backing_vp && vnode_get(backing_vp) != 0)
+                       backing_vp = NULL;
+               hfs_unlock_mount(hfsmp);
+
+               if (backing_vp) {
+                       struct mount *mp = vnode_mount(backing_vp);
+                       printf("hfs: set VeryLowDisk: vol:%s, backingstore b_avail:%lld, tag:%d\n", 
+                                  hfsmp->vcbVN, mp->mnt_vfsstat.f_bavail, backing_vp->v_tag);
+                       vnode_put(backing_vp);
+               }
+#endif
+
+               hfsmp->hfs_notification_conditions |= (VQ_VERYLOWDISK|VQ_LOWDISK);
+               vfs_event_signal(&fsid, hfsmp->hfs_notification_conditions, (intptr_t)NULL);
+       } else if (state == 1) {
+               /* 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;
+                       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 {
-               /* Check to see whether the free space fell below the requested limit: */
-               if (hfs_freeblks(hfsmp, 1) < hfsmp->hfs_freespace_notify_warninglimit) {
-            hfsmp->hfs_notification_conditions |= VQ_LOWDISK;
-            vfs_event_signal(&fsid, hfsmp->hfs_notification_conditions, NULL);
+       } else if (state == 0) {
+               /* Free blocks count has increased to desirable level, so clear all conditions */
+               if (hfsmp->hfs_notification_conditions & (VQ_LOWDISK|VQ_VERYLOWDISK)) {
+                       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);
+                       if (hfsmp->hfs_notification_conditions == 0) {
+                               vfs_event_signal(&fsid, VQ_UPDATE, (intptr_t)NULL);
+                       } else {
+                               vfs_event_signal(&fsid, hfsmp->hfs_notification_conditions, (intptr_t)NULL);
+                       }

                }
                }

-       };
+       }

 }
 }