When running with soft updates, track the number of blocks and files

that are committed to being freed and reflect these blocks in the
counts returned by statfs (and thus also by the `df' command). This
change allows programs such as those that do news expiration to
know when to stop if they are trying to create a certain percentage
of free space. Note that this change does not solve the much harder
problem of making this to-be-freed space available to applications
that want it (thus on a nearly full filesystem, you may still
encounter out-of-space conditions even though the free space will
show up eventually). Hopefully this harder problem will be the
subject of a future enhancement.

1 files changed, 5 insertions, 2 deletions

diff --git a/sys/ufs/ffs/softdep.h b/sys/ufs/ffs/softdep.h
index cf9cac8..9a158c5 100644
--- a/sys/ufs/ffs/softdep.h
+++ b/sys/ufs/ffs/softdep.h
@@ -82,8 +82,10 @@
  * data structure is frozen from further change until its dependencies
  * have been completed and its resources freed after which it will be
  * discarded. The IOSTARTED flag prevents multiple calls to the I/O
- * start routine from doing multiple rollbacks. The ONWORKLIST flag
- * shows whether the structure is currently linked onto a worklist.
+ * start routine from doing multiple rollbacks. The SPACECOUNTED flag
+ * says that the files space has been accounted to the pending free
+ * space count. The ONWORKLIST flag shows whether the structure is
+ * currently linked onto a worklist.
  */
 #define	ATTACHED	0x0001
 #define	UNDONE		0x0002
@@ -95,6 +97,7 @@
 #define DIRCHG		0x0080
 #define GOINGAWAY	0x0100
 #define IOSTARTED	0x0200
+#define SPACECOUNTED	0x0400
 #define ONWORKLIST	0x8000
 
 #define	ALLCOMPLETE	(ATTACHED | COMPLETE | DEPCOMPLETE)