[mirror_edk2.git] / StdLibPrivateInternalFiles / Include / kfile.h

/** @file\r
  The EFI kernel's interpretation of a "file".\r
\r
  Copyright (c) 2011, Intel Corporation. All rights reserved.<BR>\r
  This program and the accompanying materials are licensed and made available\r
  under the terms and conditions of the BSD License which accompanies this\r
  distribution.  The full text of the license may be found at\r
  http://opensource.org/licenses/bsd-license.php.\r
\r
  THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r
  WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r
\r
 * Copyright (c) 1982, 1986, 1989, 1993\r
 *  The Regents of the University of California.  All rights reserved.\r
 *\r
 * Redistribution and use in source and binary forms, with or without\r
 * modification, are permitted provided that the following conditions\r
 * are met:\r
 * 1. Redistributions of source code must retain the above copyright\r
 *    notice, this list of conditions and the following disclaimer.\r
 * 2. Redistributions in binary form must reproduce the above copyright\r
 *    notice, this list of conditions and the following disclaimer in the\r
 *    documentation and/or other materials provided with the distribution.\r
 * 3. Neither the name of the University nor the names of its contributors\r
 *    may be used to endorse or promote products derived from this software\r
 *    without specific prior written permission.\r
 *\r
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND\r
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE\r
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE\r
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE\r
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL\r
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS\r
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)\r
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT\r
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY\r
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF\r
 * SUCH DAMAGE.\r
 *\r
 *  file.h  8.3 (Berkeley) 1/9/95\r
    NetBSD: file.h,v 1.56 2006/05/14 21:38:18 elad Exp\r
**/\r
#ifndef _PIF_KFILE_H_\r
#define _PIF_KFILE_H_\r
\r
#include  <Uefi.h>\r
#include  <Protocol/SimpleTextOut.h>\r
#include  <Protocol/SimpleFileSystem.h>\r
\r
#include  <wchar.h>\r
#include  <sys/fcntl.h>\r
#include  <sys/unistd.h>\r
\r
struct stat;\r
struct fileops;\r
struct _Device_Node;\r
\r
/* The number of "special" character stream devices.\r
   These include:\r
    stdin, stdout, stderr\r
*/\r
#define NUM_SPECIAL   3\r
\r
/* Organization of the f_iflags member of the __filedes structure. */\r
#define DTYPE_MASK      0x00000007    ///< Device Type\r
#define DTYPE_VNODE             1     /* file */\r
#define DTYPE_SOCKET            2     /* communications endpoint */\r
#define DTYPE_PIPE              3     /* pipe */\r
#define DTYPE_KQUEUE            4     /* event queue */\r
#define DTYPE_MISC              5     /* misc file descriptor type */\r
#define DTYPE_CRYPTO            6     /* crypto */\r
#define DTYPE_NAMES   "0", "file", "socket", "pipe", "kqueue", "misc", "crypto"\r
\r
#define FIF_WANTCLOSE   0x10000000  /* a close is waiting for usecount */\r
#define FIF_DELCLOSE    0x20000000  /* Delete on close. */\r
#define FIF_LARVAL      0x80000000  /* not fully constructed; don't use */\r
\r
/*\r
    This structure must be a multiple of 8 bytes in length.\r
*/\r
struct __filedes {\r
  const struct fileops   *f_ops;\r
  void                   *devdata;      /* Device-specific data */\r
  off_t                   f_offset;     /* current position in file */\r
  UINT32                  f_flag;       /* see fcntl.h */\r
  UINT32                  f_iflags;     // In use if non-zero\r
  int                     Oflags;       // From the open call\r
  int                     Omode;        // From the open call\r
  int                     RefCount;     // Reference count of opens\r
  UINT16                  MyFD;         // Which FD this is.\r
  UINT16                  Reserved_1;   // Force this structure to be a multiple of 8-bytes in length\r
};\r
\r
struct fileops {\r
  /* These functions must always be implemented. */\r
  int     (EFIAPI *fo_close)    (struct __filedes *filp);\r
  ssize_t (EFIAPI *fo_read)     (struct __filedes *filp, off_t *Offset, size_t Len, void *Buf);\r
  ssize_t (EFIAPI *fo_write)    (struct __filedes *filp, off_t *Offset, size_t Len, const void *Buf);\r
\r
  /* Call the fnullop_* version of these functions if not implemented by the device. */\r
  int     (EFIAPI *fo_fcntl)    (struct __filedes *filp, UINT32 Cmd, void *p3, void *p4);\r
  short   (EFIAPI *fo_poll)     (struct __filedes *filp, short Events);\r
  int     (EFIAPI *fo_flush)    (struct __filedes *filp);\r
\r
  /* Call the fbadop_* version of these functions if not implemented by the device. */\r
  int     (EFIAPI *fo_stat)     (struct __filedes *filp, struct stat *StatBuf, void *Buf);\r
  int     (EFIAPI *fo_ioctl)    (struct __filedes *filp, ULONGN Cmd, void *argp);\r
  int     (EFIAPI *fo_delete)   (struct __filedes *filp);\r
  int     (EFIAPI *fo_rmdir)    (struct __filedes *filp);\r
  int     (EFIAPI *fo_mkdir)    (const char *path, __mode_t perms);\r
  int     (EFIAPI *fo_rename)   (const char *from, const char *to);\r
\r
  /* Use a NULL if this function has not been implemented by the device. */\r
  off_t   (EFIAPI *fo_lseek)    (struct __filedes *filp, off_t, int);\r
};\r
\r
/*  A generic instance structure which is valid for\r
    for all device instance structures.\r
\r
    All device instance structures MUST be a multiple of 8-bytes in length.\r
*/\r
typedef struct {\r
  UINT32                      Cookie;       ///< Special value identifying this as a valid Instance\r
  UINT32                      InstanceNum;  ///< Which instance is this?  Zero-based.\r
  EFI_HANDLE                  Dev;          ///< Pointer to either Input or Output Protocol.\r
  struct _Device_Node        *Parent;       ///< Points to the parent Device Node.\r
  struct fileops              Abstraction;  ///< Pointers to functions implementing this device's abstraction.\r
  UINTN                       Reserved_1;   // Force this to always be a multiple of 8-bytes in length\r
} GenericInstance;\r
\r
/* Type of all Device-specific handler's open routines. */\r
typedef\r
  int     (EFIAPI *FO_OPEN)    (struct __filedes *FD, void *IP, wchar_t *Path, wchar_t *Flags);\r
\r
#define FILE_IS_USABLE(fp)  (((fp)->f_iflags &      \\r
          (FIF_WANTCLOSE|FIF_LARVAL)) == 0)\r
\r
#define FILE_SET_MATURE(fp)       \\r
do {                              \\r
  (fp)->f_iflags &= ~FIF_LARVAL;  \\r
} while (/*CONSTCOND*/0)\r
\r
/*\r
 * Flags for fo_read and fo_write.\r
 */\r
#define FOF_UPDATE_OFFSET 0x01      /* update the file offset */\r
\r
__BEGIN_DECLS\r
\r
int   fdcreate    (CHAR16 *, UINT32, UINT32, BOOLEAN, VOID *, const struct fileops *);\r
\r
/* Commonly used fileops\r
      fnullop_*   Does nothing and returns success.\r
      fbadop_*    Does nothing and returns EPERM\r
*/\r
int     fnullop_fcntl (struct __filedes *filp, UINT32 Cmd, void *p3, void *p4);\r
short   fnullop_poll  (struct __filedes *filp, short Events);\r
int     fnullop_flush (struct __filedes *filp);\r
\r
int     fbadop_stat   (struct __filedes *filp, struct stat *StatBuf, void *Buf);\r
int     fbadop_ioctl  (struct __filedes *filp, ULONGN Cmd, void *argp);\r
int     fbadop_delete (struct __filedes *filp);\r
int     fbadop_rmdir  (struct __filedes *filp);\r
int     fbadop_mkdir  (const char *path, __mode_t perms);\r
int     fbadop_rename (const char *from, const char *to);\r
\r
__END_DECLS\r
\r
/* From the original file... */\r
#if 0\r
\r
//struct proc;\r
//struct lwp;\r
//struct uio;\r
//struct iovec;\r
//struct knote;\r
\r
//LIST_HEAD(filelist, file);\r
//extern struct filelist  filehead;   /* head of list of open files */\r
//extern int              maxfiles;   /* kernel limit on # of open files */\r
//extern int              nfiles;     /* actual number of open files */\r
\r
//extern const struct fileops vnops;  /* vnode operations for files */\r
\r
struct fileops {\r
  int (*fo_read)      (struct file *, off_t *, struct uio *, kauth_cred_t, int);\r
  int (*fo_write)     (struct file *, off_t *, struct uio *, kauth_cred_t, int);\r
  int (*fo_ioctl)     (struct file *, u_long, void *, struct lwp *);\r
  int (*fo_fcntl)     (struct file *, u_int, void *, struct lwp *);\r
  int (*fo_poll)      (struct file *, int, struct lwp *);\r
  int (*fo_stat)      (struct file *, struct stat *, struct lwp *);\r
  int (*fo_close)     (struct file *, struct lwp *);\r
};\r
\r
/*\r
 * Kernel descriptor table.\r
 * One entry for each open kernel vnode and socket.\r
 */\r
struct file {\r
  LIST_ENTRY(file)        f_list;     /* list of active files */\r
  void                   *f_data;     /* descriptor data, e.g. vnode/socket */\r
  const struct fileops   *f_ops;\r
  void                   *f_DevDesc;  /* Device Descriptor pointer */\r
  EFI_FILE_HANDLE         FileHandle;\r
  EFI_HANDLE              Handle;\r
  off_t                   f_offset;   /* current position in file */\r
  int                     f_flag;     /* see fcntl.h */\r
  UINT32                  f_iflags;   /* internal flags; FIF_* */\r
  int                     f_advice;   /* access pattern hint; UVM_ADV_* */\r
  int                     f_type;     /* descriptor type */\r
  int                     f_usecount; /* number active users */\r
  u_int                   f_count;    /* reference count */\r
  u_int                   f_msgcount; /* references from message queue */\r
//  kauth_cred_t            f_cred;     /* creds associated with descriptor */\r
  struct simplelock       f_slock;\r
  UINT16                  MyFD;       /* Which FD this is. */\r
};\r
\r
#ifdef DIAGNOSTIC\r
#define FILE_USE_CHECK(fp, str)   \\r
  do {                              \\r
  if ((fp)->f_usecount < 0)       \\r
    panic(str);                   \\r
} while (/* CONSTCOND */ 0)\r
#else\r
#define FILE_USE_CHECK(fp, str)   /* nothing */\r
#endif\r
\r
  /*\r
   * FILE_USE() must be called with the file lock held.\r
   * (Typical usage is: `fp = fd_getfile(..); FILE_USE(fp);'\r
   * and fd_getfile() returns the file locked)\r
   *\r
   * fp is a pointer to a __filedes structure.\r
   */\r
#define FILE_USE(fp)                                \\r
    do {                                                \\r
    (fp)->f_usecount++;                               \\r
    FILE_USE_CHECK((fp), "f_usecount overflow");      \\r
    simple_unlock(&(fp)->f_slock);                    \\r
  } while (/* CONSTCOND */ 0)\r
\r
#define FILE_UNUSE_WLOCK(fp, l, havelock)           \\r
      do {                                                \\r
      if (!(havelock))                                  \\r
        simple_lock(&(fp)->f_slock);                    \\r
        if ((fp)->f_iflags & FIF_WANTCLOSE) {             \\r
        simple_unlock(&(fp)->f_slock);                  \\r
        /* Will drop usecount */                        \\r
        (void) closef((fp), (l));                       \\r
        break;                                          \\r
        } else {                                          \\r
        (fp)->f_usecount--;                             \\r
        FILE_USE_CHECK((fp), "f_usecount underflow");   \\r
      }                                                 \\r
      simple_unlock(&(fp)->f_slock);                    \\r
    } while (/* CONSTCOND */ 0)\r
\r
#define FILE_UNUSE(fp, l)           FILE_UNUSE_WLOCK(fp, l, 0)\r
#define FILE_UNUSE_HAVELOCK(fp, l)  FILE_UNUSE_WLOCK(fp, l, 1)\r
\r
__BEGIN_DECLS\r
//int   dofileread  (struct lwp *, int, struct file *, void *, size_t, off_t *, int, register_t *);\r
//int   dofilewrite (struct lwp *, int, struct file *, const void *, size_t, off_t *, int, register_t *);\r
\r
//int   dofilereadv (struct lwp *, int, struct file *, const struct iovec *, int, off_t *, int, register_t *);\r
//int   dofilewritev(struct lwp *, int, struct file *, const struct iovec *, int, off_t *, int, register_t *);\r
\r
//int   fsetown     (struct proc *, pid_t *, int, const void *);\r
//int   fgetown     (struct proc *, pid_t, int, void *);\r
//void  fownsignal  (pid_t, int, int, int, void *);\r
\r
//int   fdclone     (struct lwp *, struct file *, int, int, const struct fileops *, void *);\r
\r
/* Commonly used fileops\r
      fnullop_*   Does nothing and returns success.\r
      fbadop_*    Does nothing and returns EPERM\r
*/\r
//int   fnullop_fcntl   (struct file *, u_int, void *, struct lwp *);\r
//int   fnullop_poll    (struct file *, int, struct lwp *);\r
//int   fnullop_kqfilter(struct file *, struct knote *);\r
//int   fbadop_stat     (struct file *, struct stat *, struct lwp *);\r
//int   fbadop_ioctl    (struct file *, u_long, void *, struct lwp *);\r
__END_DECLS\r
\r
#endif\r
\r
#endif /* _PIF_KFILE_H_ */\r
Commit	Line	Data
b00771f5	1	/** @file\r
	2	The EFI kernel's interpretation of a "file".\r
	3	\r
	4	Copyright (c) 2011, Intel Corporation. All rights reserved.<BR>\r
	5	This program and the accompanying materials are licensed and made available\r
	6	under the terms and conditions of the BSD License which accompanies this\r
	7	distribution. The full text of the license may be found at\r
	8	http://opensource.org/licenses/bsd-license.php.\r
	9	\r
	10	THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r
	11	WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r
	12	\r
	13	* Copyright (c) 1982, 1986, 1989, 1993\r
	14	* The Regents of the University of California. All rights reserved.\r
	15	*\r
	16	* Redistribution and use in source and binary forms, with or without\r
	17	* modification, are permitted provided that the following conditions\r
	18	* are met:\r
	19	* 1. Redistributions of source code must retain the above copyright\r
	20	* notice, this list of conditions and the following disclaimer.\r
	21	* 2. Redistributions in binary form must reproduce the above copyright\r
	22	* notice, this list of conditions and the following disclaimer in the\r
	23	* documentation and/or other materials provided with the distribution.\r
	24	* 3. Neither the name of the University nor the names of its contributors\r
	25	* may be used to endorse or promote products derived from this software\r
	26	* without specific prior written permission.\r
	27	*\r
	28	* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND\r
	29	* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE\r
	30	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE\r
	31	* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE\r
	32	* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL\r
	33	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS\r
	34	* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)\r
	35	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT\r
	36	* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY\r
	37	* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF\r
	38	* SUCH DAMAGE.\r
	39	*\r
	40	* file.h 8.3 (Berkeley) 1/9/95\r
	41	NetBSD: file.h,v 1.56 2006/05/14 21:38:18 elad Exp\r
	42	**/\r
	43	#ifndef _PIF_KFILE_H_\r
	44	#define _PIF_KFILE_H_\r
	45	\r
	46	#include <Uefi.h>\r
	47	#include <Protocol/SimpleTextOut.h>\r
	48	#include <Protocol/SimpleFileSystem.h>\r
	49	\r
	50	#include <wchar.h>\r
	51	#include <sys/fcntl.h>\r
	52	#include <sys/unistd.h>\r
	53	\r
	54	struct stat;\r
	55	struct fileops;\r
	56	struct _Device_Node;\r
	57	\r
	58	/* The number of "special" character stream devices.\r
	59	These include:\r
	60	stdin, stdout, stderr\r
	61	*/\r
	62	#define NUM_SPECIAL 3\r
	63	\r
	64	/* Organization of the f_iflags member of the __filedes structure. */\r
65	#define DTYPE_MASK 0x00000007 ///< Device Type\r
66	#define DTYPE_VNODE 1 /* file */\r
67	#define DTYPE_SOCKET 2 /* communications endpoint */\r
68	#define DTYPE_PIPE 3 /* pipe */\r
69	#define DTYPE_KQUEUE 4 /* event queue */\r
70	#define DTYPE_MISC 5 /* misc file descriptor type */\r
71	#define DTYPE_CRYPTO 6 /* crypto */\r
72	#define DTYPE_NAMES "0", "file", "socket", "pipe", "kqueue", "misc", "crypto"\r
73	\r
74	#define FIF_WANTCLOSE 0x10000000 /* a close is waiting for usecount */\r
75	#define FIF_DELCLOSE 0x20000000 /* Delete on close. */\r
76	#define FIF_LARVAL 0x80000000 /* not fully constructed; don't use */\r
77	\r
78	/*\r
79	This structure must be a multiple of 8 bytes in length.\r
80	*/\r
81	struct __filedes {\r
82	const struct fileops *f_ops;\r
83	void devdata; / Device-specific data */\r
84	off_t f_offset; /* current position in file */\r
85	UINT32 f_flag; /* see fcntl.h */\r
86	UINT32 f_iflags; // In use if non-zero\r
87	int Oflags; // From the open call\r
88	int Omode; // From the open call\r
89	int RefCount; // Reference count of opens\r
90	UINT16 MyFD; // Which FD this is.\r
91	UINT16 Reserved_1; // Force this structure to be a multiple of 8-bytes in length\r
92	};\r
93	\r
94	struct fileops {\r
95	/* These functions must always be implemented. */\r
96	int (EFIAPI fo_close) (struct __filedes filp);\r
97	ssize_t (EFIAPI fo_read) (struct __filedes filp, off_t Offset, size_t Len, void Buf);\r
98	ssize_t (EFIAPI fo_write) (struct __filedes filp, off_t Offset, size_t Len, const void Buf);\r
99	\r
100	/* Call the fnullop_* version of these functions if not implemented by the device. */\r
101	int (EFIAPI fo_fcntl) (struct __filedes filp, UINT32 Cmd, void p3, void p4);\r
102	short (EFIAPI fo_poll) (struct __filedes filp, short Events);\r
103	int (EFIAPI fo_flush) (struct __filedes filp);\r
104	\r
105	/* Call the fbadop_* version of these functions if not implemented by the device. */\r
106	int (EFIAPI fo_stat) (struct __filedes filp, struct stat StatBuf, void Buf);\r
107	int (EFIAPI fo_ioctl) (struct __filedes filp, ULONGN Cmd, void *argp);\r
108	int (EFIAPI fo_delete) (struct __filedes filp);\r
109	int (EFIAPI fo_rmdir) (struct __filedes filp);\r
110	int (EFIAPI fo_mkdir) (const char path, __mode_t perms);\r
111	int (EFIAPI fo_rename) (const char from, const char *to);\r
112	\r
113	/* Use a NULL if this function has not been implemented by the device. */\r
114	off_t (EFIAPI fo_lseek) (struct __filedes filp, off_t, int);\r
115	};\r
116	\r
117	/* A generic instance structure which is valid for\r
118	for all device instance structures.\r
119	\r
120	All device instance structures MUST be a multiple of 8-bytes in length.\r
121	*/\r
122	typedef struct {\r
123	UINT32 Cookie; ///< Special value identifying this as a valid Instance\r
124	UINT32 InstanceNum; ///< Which instance is this? Zero-based.\r
125	EFI_HANDLE Dev; ///< Pointer to either Input or Output Protocol.\r
126	struct _Device_Node *Parent; ///< Points to the parent Device Node.\r
127	struct fileops Abstraction; ///< Pointers to functions implementing this device's abstraction.\r
128	UINTN Reserved_1; // Force this to always be a multiple of 8-bytes in length\r
129	} GenericInstance;\r
130	\r
131	/* Type of all Device-specific handler's open routines. */\r
132	typedef\r
133	int (EFIAPI FO_OPEN) (struct __filedes FD, void IP, wchar_t Path, wchar_t *Flags);\r
134	\r
135	#define FILE_IS_USABLE(fp) (((fp)->f_iflags & \\r
136	(FIF_WANTCLOSE\|FIF_LARVAL)) == 0)\r
137	\r
138	#define FILE_SET_MATURE(fp) \\r
139	do { \\r
140	(fp)->f_iflags &= ~FIF_LARVAL; \\r
141	} while (/CONSTCOND/0)\r
142	\r
143	/*\r
144	* Flags for fo_read and fo_write.\r
145	*/\r
146	#define FOF_UPDATE_OFFSET 0x01 /* update the file offset */\r
147	\r
148	__BEGIN_DECLS\r
149	\r
150	int fdcreate (CHAR16 , UINT32, UINT32, BOOLEAN, VOID , const struct fileops *);\r
151	\r
152	/* Commonly used fileops\r
153	fnullop_* Does nothing and returns success.\r
154	fbadop_* Does nothing and returns EPERM\r
155	*/\r
156	int fnullop_fcntl (struct __filedes filp, UINT32 Cmd, void p3, void *p4);\r
157	short fnullop_poll (struct __filedes *filp, short Events);\r
158	int fnullop_flush (struct __filedes *filp);\r
159	\r
160	int fbadop_stat (struct __filedes filp, struct stat StatBuf, void *Buf);\r
161	int fbadop_ioctl (struct __filedes filp, ULONGN Cmd, void argp);\r
162	int fbadop_delete (struct __filedes *filp);\r
163	int fbadop_rmdir (struct __filedes *filp);\r
164	int fbadop_mkdir (const char *path, __mode_t perms);\r
165	int fbadop_rename (const char from, const char to);\r
166	\r
167	__END_DECLS\r
168	\r
169	/* From the original file... */\r
170	#if 0\r
171	\r
172	//struct proc;\r
173	//struct lwp;\r
174	//struct uio;\r
175	//struct iovec;\r
176	//struct knote;\r
177	\r
178	//LIST_HEAD(filelist, file);\r
179	//extern struct filelist filehead; /* head of list of open files */\r
180	//extern int maxfiles; /* kernel limit on # of open files */\r
181	//extern int nfiles; /* actual number of open files */\r
182	\r
183	//extern const struct fileops vnops; /* vnode operations for files */\r
184	\r
185	struct fileops {\r
186	int (fo_read) (struct file , off_t , struct uio , kauth_cred_t, int);\r
187	int (fo_write) (struct file , off_t , struct uio , kauth_cred_t, int);\r
188	int (fo_ioctl) (struct file , u_long, void , struct lwp );\r
189	int (fo_fcntl) (struct file , u_int, void , struct lwp );\r
190	int (fo_poll) (struct file , int, struct lwp *);\r
191	int (fo_stat) (struct file , struct stat , struct lwp );\r
192	int (fo_close) (struct file , struct lwp *);\r
193	};\r
194	\r
195	/*\r
196	* Kernel descriptor table.\r
197	* One entry for each open kernel vnode and socket.\r
198	*/\r
199	struct file {\r
200	LIST_ENTRY(file) f_list; /* list of active files */\r
201	void f_data; / descriptor data, e.g. vnode/socket */\r
202	const struct fileops *f_ops;\r
203	void f_DevDesc; / Device Descriptor pointer */\r
204	EFI_FILE_HANDLE FileHandle;\r
205	EFI_HANDLE Handle;\r
206	off_t f_offset; /* current position in file */\r
207	int f_flag; /* see fcntl.h */\r
208	UINT32 f_iflags; /* internal flags; FIF_* */\r
209	int f_advice; /* access pattern hint; UVM_ADV_* */\r
210	int f_type; /* descriptor type */\r
211	int f_usecount; /* number active users */\r
212	u_int f_count; /* reference count */\r
213	u_int f_msgcount; /* references from message queue */\r
214	// kauth_cred_t f_cred; /* creds associated with descriptor */\r
215	struct simplelock f_slock;\r
216	UINT16 MyFD; /* Which FD this is. */\r
217	};\r
218	\r
219	#ifdef DIAGNOSTIC\r
220	#define FILE_USE_CHECK(fp, str) \\r
221	do { \\r
222	if ((fp)->f_usecount < 0) \\r
223	panic(str); \\r
224	} while (/* CONSTCOND */ 0)\r
225	#else\r
226	#define FILE_USE_CHECK(fp, str) /* nothing */\r
227	#endif\r
228	\r
229	/*\r
230	* FILE_USE() must be called with the file lock held.\r
231	* (Typical usage is: `fp = fd_getfile(..); FILE_USE(fp);'\r
232	* and fd_getfile() returns the file locked)\r
233	*\r
234	* fp is a pointer to a __filedes structure.\r
235	*/\r
236	#define FILE_USE(fp) \\r
237	do { \\r
238	(fp)->f_usecount++; \\r
239	FILE_USE_CHECK((fp), "f_usecount overflow"); \\r
240	simple_unlock(&(fp)->f_slock); \\r
241	} while (/* CONSTCOND */ 0)\r
242	\r
243	#define FILE_UNUSE_WLOCK(fp, l, havelock) \\r
244	do { \\r
245	if (!(havelock)) \\r
246	simple_lock(&(fp)->f_slock); \\r
247	if ((fp)->f_iflags & FIF_WANTCLOSE) { \\r
248	simple_unlock(&(fp)->f_slock); \\r
249	/* Will drop usecount */ \\r
250	(void) closef((fp), (l)); \\r
251	break; \\r
252	} else { \\r
253	(fp)->f_usecount--; \\r
254	FILE_USE_CHECK((fp), "f_usecount underflow"); \\r
255	} \\r
256	simple_unlock(&(fp)->f_slock); \\r
257	} while (/* CONSTCOND */ 0)\r
258	\r
259	#define FILE_UNUSE(fp, l) FILE_UNUSE_WLOCK(fp, l, 0)\r
260	#define FILE_UNUSE_HAVELOCK(fp, l) FILE_UNUSE_WLOCK(fp, l, 1)\r
261	\r
262	__BEGIN_DECLS\r
263	//int dofileread (struct lwp , int, struct file , void , size_t, off_t , int, register_t *);\r
264	//int dofilewrite (struct lwp , int, struct file , const void , size_t, off_t , int, register_t *);\r
265	\r
266	//int dofilereadv (struct lwp , int, struct file , const struct iovec , int, off_t , int, register_t *);\r
267	//int dofilewritev(struct lwp , int, struct file , const struct iovec , int, off_t , int, register_t *);\r
268	\r
269	//int fsetown (struct proc , pid_t , int, const void *);\r
270	//int fgetown (struct proc , pid_t, int, void );\r
271	//void fownsignal (pid_t, int, int, int, void *);\r
272	\r
273	//int fdclone (struct lwp , struct file , int, int, const struct fileops , void );\r
274	\r
275	/* Commonly used fileops\r
276	fnullop_* Does nothing and returns success.\r
277	fbadop_* Does nothing and returns EPERM\r
278	*/\r
279	//int fnullop_fcntl (struct file , u_int, void , struct lwp *);\r
280	//int fnullop_poll (struct file , int, struct lwp );\r
281	//int fnullop_kqfilter(struct file , struct knote );\r
282	//int fbadop_stat (struct file , struct stat , struct lwp *);\r
283	//int fbadop_ioctl (struct file , u_long, void , struct lwp *);\r
284	__END_DECLS\r
285	\r
286	#endif\r
287	\r
288	#endif /* _PIF_KFILE_H_ */\r