[src/chs-ubc2]: src/sys/sys add a "b_private" field to struct buf, for use by...

[chs <chs%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/eefc73c88f7c
branches:  chs-ubc2
changeset: 471367:eefc73c88f7c
user:      chs <chs%NetBSD.org@localhost>
date:      Sun Jul 04 01:48:19 1999 +0000

description:
add a "b_private" field to struct buf, for use by the buffer's owner.
bring back B_CACHE, it's useful for debugging.
add B_PDAEMON and bufpool.

diffstat:

 sys/sys/buf.h |  10 ++++++++--
 1 files changed, 8 insertions(+), 2 deletions(-)

diffs (50 lines):

diff -r 9691671506b4 -r eefc73c88f7c sys/sys/buf.h
--- a/sys/sys/buf.h     Sun Jul 04 01:46:53 1999 +0000
+++ b/sys/sys/buf.h     Sun Jul 04 01:48:19 1999 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: buf.h,v 1.33.4.2 1999/06/21 01:30:14 thorpej Exp $     */
+/*     $NetBSD: buf.h,v 1.33.4.3 1999/07/04 01:48:19 chs Exp $ */
 
 /*
  * Copyright (c) 1982, 1986, 1989, 1993
@@ -71,6 +71,7 @@
                                        /* Function to call upon completion. */
        void    (*b_iodone) __P((struct buf *));
        struct  vnode *b_vp;            /* Device vnode. */
+       void    *b_private;             /* Private data for locker */
        int     b_dirtyoff;             /* Offset in buffer of dirty region. */
        int     b_dirtyend;             /* Offset of end of dirty region. */
        struct  ucred *b_rcred;         /* Read credentials reference. */
@@ -101,6 +102,7 @@
 #define        B_ASYNC         0x00000004      /* Start I/O, do not wait. */
 #define        B_BAD           0x00000008      /* Bad block revectoring in progress. */
 #define        B_BUSY          0x00000010      /* I/O in progress. */
+#define        B_CACHE         0x00000020      /* Bread found us in the cache. */
 #define        B_CALL          0x00000040      /* Call b_iodone from biodone. */
 #define        B_DELWRI        0x00000080      /* Delay I/O until buffer reused. */
 #define        B_DIRTY         0x00000100      /* Dirty page to be pushed out async. */
@@ -120,7 +122,7 @@
 #define        B_WRITEINPROG   0x01000000      /* Write in progress. */
 #define        B_XXX           0x02000000      /* Debugging flag. */
 #define        B_VFLUSH        0x04000000      /* Buffer is being synced. */
-
+#define        B_PDAEMON       0x10000000      /* I/O initiated by pagedaemon. */
 /*
  * This structure describes a clustered I/O.  It is stored in the b_saveaddr
  * field of the buffer on which I/O is done.  At I/O completion, cluster
@@ -148,11 +150,15 @@
 #define B_SYNC         0x02    /* Do all allocations synchronously. */
 
 #ifdef _KERNEL
+#include <sys/pool.h>
+
 int    nbuf;                   /* The number of buffer headers */
 struct buf *buf;               /* The buffer headers. */
 char   *buffers;               /* The buffer contents. */
 int    bufpages;               /* Number of memory pages in the buffer pool. */
 extern int nswbuf;             /* Number of swap I/O buffer headers. */
+extern struct pool bufpool;
+
 
 __BEGIN_DECLS
 void   allocbuf __P((struct buf *, int));