xnu-2422.90.20.tar.gz

[apple/xnu.git] / bsd / sys / pipe.h

diff --git a/bsd/sys/pipe.h b/bsd/sys/pipe.h
index c999c7dbfd4eed896482b58e3c262a17f5df3928..3437710b253f8f1c7148472c66f262d80beab005 100644 (file)
--- a/bsd/sys/pipe.h
+++ b/bsd/sys/pipe.h
@@ -1,23 +1,29 @@
 /*
  * Copyright (c) 2004-2005 Apple Computer, Inc. All rights reserved.
  *
- * @APPLE_LICENSE_HEADER_START@
+ * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
  * 
- * The contents of this file constitute Original Code as defined in and
- * are subject to the Apple Public Source License Version 1.1 (the
- * "License").  You may not use this file except in compliance with the
- * License.  Please obtain a copy of the License at
- * http://www.apple.com/publicsource and read it before using this file.
+ * 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.
  * 
- * This Original Code and all software distributed under the License are
- * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
+ * 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 OR NON-INFRINGEMENT.  Please see the
- * License for the specific language governing rights and limitations
- * under the License.
+ * 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_LICENSE_HEADER_END@
+ * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
  */
 /*
  * Copyright (c) 1996 John S. Dyson
@@ -41,6 +47,12 @@
  *
  * $FreeBSD: src/sys/sys/pipe.h,v 1.24 2003/08/13 20:01:38 alc Exp $
  */
+/*
+ * NOTICE: This file was modified by SPARTA, Inc. in 2006 to introduce
+ * support for mandatory and extensible security protections.  This notice
+ * is included in support of clause 2.2 (b) of the Apple Public License,
+ * Version 2.0.
+ */
 
 #ifndef _SYS_PIPE_H_
 #define _SYS_PIPE_H_
@@ -59,6 +71,8 @@
 #define PIPE_SIZE      16384
 #endif
 
+#define PIPE_KVAMAX    (1024 * 1024 * 16)
+
 #ifndef BIG_PIPE_SIZE
 #define BIG_PIPE_SIZE  (64*1024)
 #endif
@@ -95,7 +109,6 @@ struct pipebuf {
 /*
  * Information to support direct transfers between processes for pipes.
  */
-/* LP64todo - not 64bit safe */
 struct pipemapping {
        vm_offset_t     kva;            /* kernel virtual address */
        vm_size_t       cnt;            /* number of chars in buffer */
@@ -118,9 +131,16 @@ struct pipemapping {
 #define PIPE_LWANT     0x200   /* Process wants exclusive access to pointers/data. */
 #define PIPE_DIRECTW   0x400   /* Pipe direct write active. */
 #define PIPE_DIRECTOK  0x800   /* Direct mode ok. */
-#define PIPE_KNOTE     0x1000   /* Pipe has kernel events activated */
+#define PIPE_KNOTE     0x1000   /* Pipe has kernel events activated */
+#define PIPE_DRAIN     0x2000  /* Waiting for I/O to drop for a close.  Treated like EOF;
+                                       only separate for easier debugging. */
+#define PIPE_WSELECT   0x4000  /* Some thread has done an FWRITE select on the pipe */
+#define PIPE_DEAD      0x8000  /* Pipe is dead and needs garbage collection */
 
 #ifdef KERNEL
+
+struct label;
+
 /*
  * Per-pipe data structure.
  * Two of these are linked together to produce bi-directional pipes.
@@ -135,11 +155,12 @@ struct pipe {
        struct  pipe *pipe_peer;        /* link with other direction */
        u_int   pipe_state;             /* pipe status info */
        int     pipe_busy;              /* busy flag, mostly to handle rundown sanely */
-#ifdef MAC
-       struct  label *pipe_label;      /* pipe MAC label - shared */
-#endif
        TAILQ_HEAD(,eventqelt) pipe_evlist;
        lck_mtx_t *pipe_mtxp;           /* shared mutex between both pipes */
+       struct  timespec st_atimespec;  /* time of last access */
+       struct  timespec st_mtimespec;  /* time of last data modification */
+       struct  timespec st_ctimespec;  /* time of last status change */
+       struct  label *pipe_label;      /* pipe MAC label - shared */
 };
 
 #define PIPE_MTX(pipe)         ((pipe)->pipe_mtxp)
@@ -149,7 +170,8 @@ struct pipe {
 #define PIPE_LOCK_ASSERT(pipe, type)  lck_mtx_assert(PIPE_MTX(pipe), (type))
 
 __BEGIN_DECLS
-extern int pipe_stat(struct pipe *, struct stat *);
+void pipeinit(void);
+extern int pipe_stat(struct pipe *, void *, int);
 __END_DECLS
 
 #endif /* KERNEL */