xnu-2782.10.72.tar.gz

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

diff --git a/bsd/sys/filedesc.h b/bsd/sys/filedesc.h
index 5b0b65ef05087cf5dc668c708724857fccd058a6..b5b80a6bc6814d8de000decc4c6b2580343701b1 100644 (file)
--- a/bsd/sys/filedesc.h
+++ b/bsd/sys/filedesc.h
@@ -1,14 +1,19 @@
 /*
- * Copyright (c) 2000-2003 Apple Computer, Inc. All rights reserved.
+ * Copyright (c) 2000-2012 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, 1997 Apple Computer, Inc. All Rights Reserved */
 /*
@@ -61,7 +66,6 @@
 
 #include <sys/appleapiopts.h>
 
-#ifdef __APPLE_API_UNSTABLE
 /*
  * This structure is used for the management of descriptors.  It may be
  * shared by multiple processes.
@@ -79,6 +83,8 @@
 #define NDFILE         25              /* 125 bytes */
 #define NDEXTENT       50              /* 250 bytes in 256-byte alloc. */ 
 
+#ifdef BSD_KERNEL_PRIVATE
+
 struct klist;
 
 struct filedesc {
@@ -87,11 +93,9 @@ struct filedesc {
        struct  vnode *fd_cdir;         /* current directory */
        struct  vnode *fd_rdir;         /* root directory */
        int     fd_nfiles;              /* number of open files allocated */
-       u_short fd_lastfile;            /* high-water mark of fd_ofiles */
-       u_short fd_freefile;            /* approx. next free file */
+       int     fd_lastfile;            /* high-water mark of fd_ofiles */
+       int     fd_freefile;            /* approx. next free file */
        u_short fd_cmask;               /* mask for file creation */
-       u_short fd_refcnt;              /* reference count */
-
        int     fd_knlistsize;          /* size of knlist */
        struct  klist *fd_knlist;       /* list of attached knotes */
        u_long  fd_knhashmask;          /* size of knhash */
@@ -109,10 +113,20 @@ struct filedesc {
 /*
  * Per-process open flags.
  */
-#define        UF_EXCLOSE      0x01            /* auto-close on exec */
+#define UF_EXCLOSE     0x01            /* auto-close on exec */
+#define UF_FORKCLOSE   0x02            /* auto-close on fork */
 #define UF_RESERVED    0x04            /* open pending / in progress */
 #define UF_CLOSING     0x08            /* close in progress */
 
+#ifdef KERNEL
+#define UF_RESVWAIT    0x10            /* close in progress */
+#define        UF_INHERIT      0x20            /* "inherit-on-exec" */
+
+#define UF_VALID_FLAGS \
+       (UF_EXCLOSE | UF_FORKCLOSE | UF_RESERVED | UF_CLOSING |\
+       UF_RESVWAIT | UF_INHERIT)
+#endif /* KERNEL */
+
 /*
  * Storage required per open file descriptor.
  */
@@ -124,25 +138,28 @@ struct filedesc {
  */
 extern int     dupfdopen(struct filedesc *fdp,
                                int indx, int dfd, int mode, int error);
-extern int     fdalloc(struct proc *p, int want, int *result);
-extern void    fdrelse(struct proc *p, int fd);
-extern int     fdavail(struct proc *p, int n);
+extern int     fdalloc(proc_t p, int want, int *result);
+extern void    fdrelse(proc_t p, int fd);
+extern int     fdavail(proc_t p, int n);
 #define                fdfile(p, fd)                                   \
                        (&(p)->p_fd->fd_ofiles[(fd)])
 #define                fdflags(p, fd)                                  \
                        (&(p)->p_fd->fd_ofileflags[(fd)])
-extern int     falloc(struct proc *p,
-                               struct fileproc **resultfp, int *resultfd);
-extern void    ffree(struct file *fp);
+extern int     falloc(proc_t p, struct fileproc **resultfp, int *resultfd, vfs_context_t ctx);
 
 #ifdef __APPLE_API_PRIVATE
-extern struct  filedesc *fdcopy(struct proc *p);
-extern void    fdfree(struct proc *p);
-extern void    fdexec(struct proc *p);
+typedef struct fileproc *(*fp_allocfn_t)(void *);
+extern int     falloc_withalloc(proc_t p, struct fileproc **resultfp,
+    int *resultfd, vfs_context_t ctx,
+    fp_allocfn_t fp_zalloc, void *crarg);
+
+extern struct  filedesc *fdcopy(proc_t p, struct vnode *uth_cdir);
+extern void    fdfree(proc_t p);
+extern void    fdexec(proc_t p, short flags);
 #endif /* __APPLE_API_PRIVATE */
 
 #endif /* KERNEL */
 
-#endif /* __APPLE_API_UNSTABLE */
+#endif /* BSD_KERNEL_PRIVATE */
 
 #endif /* !_SYS_FILEDESC_H_ */