X-Git-Url: https://git.saurik.com/apple/xnu.git/blobdiff_plain/ff6e181ae92fc6f1e89841290f461d1f2f9badd9..2d21ac55c334faf3a56e5634905ed6987fc787d4:/bsd/sys/buf.h

diff --git a/bsd/sys/buf.h b/bsd/sys/buf.h
index 067b23721..5cb9c7f9c 100644
--- a/bsd/sys/buf.h
+++ b/bsd/sys/buf.h
@@ -1,14 +1,19 @@
 /*
  * Copyright (c) 2000-2005 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
- * 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
@@ -18,7 +23,7 @@
  * Please see the License for the specific language governing rights and
  * limitations under the License.
  * 
- * @APPLE_LICENSE_HEADER_END@
+ * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
  */
 /* Copyright (c) 1995 NeXT Computer, Inc. All Rights Reserved */
 /*
@@ -79,6 +84,9 @@
 #define B_CLUSTER	0x00000040	/* UPL based I/O generated by cluster layer */
 #define	B_PAGEIO	0x00000080	/* Page in/out */
 #define	B_META		0x00000100	/* buffer contains meta-data. */
+#define	B_RAW		0x00000200	/* Set by physio for raw transfers. */
+#define	B_FUA		0x00000400	/* Write-through disk cache(if supported) */
+#define B_PASSIVE	0x00000800	/* PASSIVE I/Os are ignored by THROTTLE I/O */
 /*
  * make sure to check when adding flags that
  * that the new flags don't overlap the definitions
@@ -112,6 +120,18 @@ void	buf_markdelayed(buf_t);
  */
 void	buf_markeintr(buf_t);
 
+/*
+ * mark the buffer associated with buf_t
+ * for write through disk cache if device supports
+ */
+void	buf_markfua(buf_t);
+
+/*
+ * returns 1 if the buffer associated with buf_t
+ * is set for write through disk cache... 0 if it does not
+ */
+int	buf_fua(buf_t);
+
 /*
  * returns 1 if the buffer associated with buf_t
  * contains valid data... 0 if it does not
@@ -172,19 +192,19 @@ void	buf_seterror(buf_t, errno_t);
 
 /*
  * set specified flags on buf_t
- * B_LOCKED/B_NOCACHE/B_ASYNC/B_READ/B_WRITE/B_PAGEIO
+ * B_LOCKED/B_NOCACHE/B_ASYNC/B_READ/B_WRITE/B_PAGEIO/B_FUA
  */
 void	buf_setflags(buf_t, int32_t);
 
 /*
  * clear specified flags on buf_t
- * B_LOCKED/B_NOCACHE/B_ASYNC/B_READ/B_WRITE/B_PAGEIO
+ * B_LOCKED/B_NOCACHE/B_ASYNC/B_READ/B_WRITE/B_PAGEIO/B_FUA
  */
 void	buf_clearflags(buf_t, int32_t);
 
 /*
  * return external flags associated with buf_t
- * B_CLUSTER/B_PHYS/B_LOCKED/B_DELWRI/B_ASYNC/B_READ/B_WRITE/B_META/B_PAGEIO
+ * B_CLUSTER/B_PHYS/B_LOCKED/B_DELWRI/B_ASYNC/B_READ/B_WRITE/B_META/B_PAGEIO/B_FUA
  */
 int32_t	buf_flags(buf_t);
 
@@ -392,8 +412,11 @@ int	buf_invalidateblks(vnode_t, int, int, int);
  */
 #define BUF_SKIP_NONLOCKED	0x01
 #define BUF_SKIP_LOCKED		0x02
+#define BUF_SCAN_CLEAN		0x04	/* scan only the clean buffers */
+#define BUF_SCAN_DIRTY		0x08	/* scan only the dirty buffers */
+#define BUF_NOTIFY_BUSY		0x10	/* notify the caller about the busy pages during the scan */
 
-void	buf_flushdirtyblks(vnode_t, int, int, char *);
+void	buf_flushdirtyblks(vnode_t, int, int, const char *);
 void	buf_iterate(vnode_t, int (*)(buf_t, void *), int, void *);
 
 #define	BUF_RETURNED		0