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Diffstat (limited to 'StdLibPrivateInternalFiles/Include/kfile.h')
| -rw-r--r-- | StdLibPrivateInternalFiles/Include/kfile.h | 288 |
1 files changed, 288 insertions, 0 deletions
diff --git a/StdLibPrivateInternalFiles/Include/kfile.h b/StdLibPrivateInternalFiles/Include/kfile.h new file mode 100644 index 000000000..845b7d908 --- /dev/null +++ b/StdLibPrivateInternalFiles/Include/kfile.h @@ -0,0 +1,288 @@ +/** @file
+ The EFI kernel's interpretation of a "file".
+
+ Copyright (c) 2011, Intel Corporation. All rights reserved.<BR>
+ This program and the accompanying materials are licensed and made available
+ under the terms and conditions of the BSD License which accompanies this
+ distribution. The full text of the license may be found at
+ http://opensource.org/licenses/bsd-license.php.
+
+ THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
+ WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
+
+ * Copyright (c) 1982, 1986, 1989, 1993
+ * The Regents of the University of California. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the University nor the names of its contributors
+ * may be used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ * file.h 8.3 (Berkeley) 1/9/95
+ NetBSD: file.h,v 1.56 2006/05/14 21:38:18 elad Exp
+**/
+#ifndef _PIF_KFILE_H_
+#define _PIF_KFILE_H_
+
+#include <Uefi.h>
+#include <Protocol/SimpleTextOut.h>
+#include <Protocol/SimpleFileSystem.h>
+
+#include <wchar.h>
+#include <sys/fcntl.h>
+#include <sys/unistd.h>
+
+struct stat;
+struct fileops;
+struct _Device_Node;
+
+/* The number of "special" character stream devices.
+ These include:
+ stdin, stdout, stderr
+*/
+#define NUM_SPECIAL 3
+
+/* Organization of the f_iflags member of the __filedes structure. */
+#define DTYPE_MASK 0x00000007 ///< Device Type
+#define DTYPE_VNODE 1 /* file */
+#define DTYPE_SOCKET 2 /* communications endpoint */
+#define DTYPE_PIPE 3 /* pipe */
+#define DTYPE_KQUEUE 4 /* event queue */
+#define DTYPE_MISC 5 /* misc file descriptor type */
+#define DTYPE_CRYPTO 6 /* crypto */
+#define DTYPE_NAMES "0", "file", "socket", "pipe", "kqueue", "misc", "crypto"
+
+#define FIF_WANTCLOSE 0x10000000 /* a close is waiting for usecount */
+#define FIF_DELCLOSE 0x20000000 /* Delete on close. */
+#define FIF_LARVAL 0x80000000 /* not fully constructed; don't use */
+
+/*
+ This structure must be a multiple of 8 bytes in length.
+*/
+struct __filedes {
+ const struct fileops *f_ops;
+ void *devdata; /* Device-specific data */
+ off_t f_offset; /* current position in file */
+ UINT32 f_flag; /* see fcntl.h */
+ UINT32 f_iflags; // In use if non-zero
+ int Oflags; // From the open call
+ int Omode; // From the open call
+ int RefCount; // Reference count of opens
+ UINT16 MyFD; // Which FD this is.
+ UINT16 Reserved_1; // Force this structure to be a multiple of 8-bytes in length
+};
+
+struct fileops {
+ /* These functions must always be implemented. */
+ int (EFIAPI *fo_close) (struct __filedes *filp);
+ ssize_t (EFIAPI *fo_read) (struct __filedes *filp, off_t *Offset, size_t Len, void *Buf);
+ ssize_t (EFIAPI *fo_write) (struct __filedes *filp, off_t *Offset, size_t Len, const void *Buf);
+
+ /* Call the fnullop_* version of these functions if not implemented by the device. */
+ int (EFIAPI *fo_fcntl) (struct __filedes *filp, UINT32 Cmd, void *p3, void *p4);
+ short (EFIAPI *fo_poll) (struct __filedes *filp, short Events);
+ int (EFIAPI *fo_flush) (struct __filedes *filp);
+
+ /* Call the fbadop_* version of these functions if not implemented by the device. */
+ int (EFIAPI *fo_stat) (struct __filedes *filp, struct stat *StatBuf, void *Buf);
+ int (EFIAPI *fo_ioctl) (struct __filedes *filp, ULONGN Cmd, void *argp);
+ int (EFIAPI *fo_delete) (struct __filedes *filp);
+ int (EFIAPI *fo_rmdir) (struct __filedes *filp);
+ int (EFIAPI *fo_mkdir) (const char *path, __mode_t perms);
+ int (EFIAPI *fo_rename) (const char *from, const char *to);
+
+ /* Use a NULL if this function has not been implemented by the device. */
+ off_t (EFIAPI *fo_lseek) (struct __filedes *filp, off_t, int);
+};
+
+/* A generic instance structure which is valid for
+ for all device instance structures.
+
+ All device instance structures MUST be a multiple of 8-bytes in length.
+*/
+typedef struct {
+ UINT32 Cookie; ///< Special value identifying this as a valid Instance
+ UINT32 InstanceNum; ///< Which instance is this? Zero-based.
+ EFI_HANDLE Dev; ///< Pointer to either Input or Output Protocol.
+ struct _Device_Node *Parent; ///< Points to the parent Device Node.
+ struct fileops Abstraction; ///< Pointers to functions implementing this device's abstraction.
+ UINTN Reserved_1; // Force this to always be a multiple of 8-bytes in length
+} GenericInstance;
+
+/* Type of all Device-specific handler's open routines. */
+typedef
+ int (EFIAPI *FO_OPEN) (struct __filedes *FD, void *IP, wchar_t *Path, wchar_t *Flags);
+
+#define FILE_IS_USABLE(fp) (((fp)->f_iflags & \
+ (FIF_WANTCLOSE|FIF_LARVAL)) == 0)
+
+#define FILE_SET_MATURE(fp) \
+do { \
+ (fp)->f_iflags &= ~FIF_LARVAL; \
+} while (/*CONSTCOND*/0)
+
+/*
+ * Flags for fo_read and fo_write.
+ */
+#define FOF_UPDATE_OFFSET 0x01 /* update the file offset */
+
+__BEGIN_DECLS
+
+int fdcreate (CHAR16 *, UINT32, UINT32, BOOLEAN, VOID *, const struct fileops *);
+
+/* Commonly used fileops
+ fnullop_* Does nothing and returns success.
+ fbadop_* Does nothing and returns EPERM
+*/
+int fnullop_fcntl (struct __filedes *filp, UINT32 Cmd, void *p3, void *p4);
+short fnullop_poll (struct __filedes *filp, short Events);
+int fnullop_flush (struct __filedes *filp);
+
+int fbadop_stat (struct __filedes *filp, struct stat *StatBuf, void *Buf);
+int fbadop_ioctl (struct __filedes *filp, ULONGN Cmd, void *argp);
+int fbadop_delete (struct __filedes *filp);
+int fbadop_rmdir (struct __filedes *filp);
+int fbadop_mkdir (const char *path, __mode_t perms);
+int fbadop_rename (const char *from, const char *to);
+
+__END_DECLS
+
+/* From the original file... */
+#if 0
+
+//struct proc;
+//struct lwp;
+//struct uio;
+//struct iovec;
+//struct knote;
+
+//LIST_HEAD(filelist, file);
+//extern struct filelist filehead; /* head of list of open files */
+//extern int maxfiles; /* kernel limit on # of open files */
+//extern int nfiles; /* actual number of open files */
+
+//extern const struct fileops vnops; /* vnode operations for files */
+
+struct fileops {
+ int (*fo_read) (struct file *, off_t *, struct uio *, kauth_cred_t, int);
+ int (*fo_write) (struct file *, off_t *, struct uio *, kauth_cred_t, int);
+ int (*fo_ioctl) (struct file *, u_long, void *, struct lwp *);
+ int (*fo_fcntl) (struct file *, u_int, void *, struct lwp *);
+ int (*fo_poll) (struct file *, int, struct lwp *);
+ int (*fo_stat) (struct file *, struct stat *, struct lwp *);
+ int (*fo_close) (struct file *, struct lwp *);
+};
+
+/*
+ * Kernel descriptor table.
+ * One entry for each open kernel vnode and socket.
+ */
+struct file {
+ LIST_ENTRY(file) f_list; /* list of active files */
+ void *f_data; /* descriptor data, e.g. vnode/socket */
+ const struct fileops *f_ops;
+ void *f_DevDesc; /* Device Descriptor pointer */
+ EFI_FILE_HANDLE FileHandle;
+ EFI_HANDLE Handle;
+ off_t f_offset; /* current position in file */
+ int f_flag; /* see fcntl.h */
+ UINT32 f_iflags; /* internal flags; FIF_* */
+ int f_advice; /* access pattern hint; UVM_ADV_* */
+ int f_type; /* descriptor type */
+ int f_usecount; /* number active users */
+ u_int f_count; /* reference count */
+ u_int f_msgcount; /* references from message queue */
+// kauth_cred_t f_cred; /* creds associated with descriptor */
+ struct simplelock f_slock;
+ UINT16 MyFD; /* Which FD this is. */
+};
+
+#ifdef DIAGNOSTIC
+#define FILE_USE_CHECK(fp, str) \
+ do { \
+ if ((fp)->f_usecount < 0) \
+ panic(str); \
+} while (/* CONSTCOND */ 0)
+#else
+#define FILE_USE_CHECK(fp, str) /* nothing */
+#endif
+
+ /*
+ * FILE_USE() must be called with the file lock held.
+ * (Typical usage is: `fp = fd_getfile(..); FILE_USE(fp);'
+ * and fd_getfile() returns the file locked)
+ *
+ * fp is a pointer to a __filedes structure.
+ */
+#define FILE_USE(fp) \
+ do { \
+ (fp)->f_usecount++; \
+ FILE_USE_CHECK((fp), "f_usecount overflow"); \
+ simple_unlock(&(fp)->f_slock); \
+ } while (/* CONSTCOND */ 0)
+
+#define FILE_UNUSE_WLOCK(fp, l, havelock) \
+ do { \
+ if (!(havelock)) \
+ simple_lock(&(fp)->f_slock); \
+ if ((fp)->f_iflags & FIF_WANTCLOSE) { \
+ simple_unlock(&(fp)->f_slock); \
+ /* Will drop usecount */ \
+ (void) closef((fp), (l)); \
+ break; \
+ } else { \
+ (fp)->f_usecount--; \
+ FILE_USE_CHECK((fp), "f_usecount underflow"); \
+ } \
+ simple_unlock(&(fp)->f_slock); \
+ } while (/* CONSTCOND */ 0)
+
+#define FILE_UNUSE(fp, l) FILE_UNUSE_WLOCK(fp, l, 0)
+#define FILE_UNUSE_HAVELOCK(fp, l) FILE_UNUSE_WLOCK(fp, l, 1)
+
+__BEGIN_DECLS
+//int dofileread (struct lwp *, int, struct file *, void *, size_t, off_t *, int, register_t *);
+//int dofilewrite (struct lwp *, int, struct file *, const void *, size_t, off_t *, int, register_t *);
+
+//int dofilereadv (struct lwp *, int, struct file *, const struct iovec *, int, off_t *, int, register_t *);
+//int dofilewritev(struct lwp *, int, struct file *, const struct iovec *, int, off_t *, int, register_t *);
+
+//int fsetown (struct proc *, pid_t *, int, const void *);
+//int fgetown (struct proc *, pid_t, int, void *);
+//void fownsignal (pid_t, int, int, int, void *);
+
+//int fdclone (struct lwp *, struct file *, int, int, const struct fileops *, void *);
+
+/* Commonly used fileops
+ fnullop_* Does nothing and returns success.
+ fbadop_* Does nothing and returns EPERM
+*/
+//int fnullop_fcntl (struct file *, u_int, void *, struct lwp *);
+//int fnullop_poll (struct file *, int, struct lwp *);
+//int fnullop_kqfilter(struct file *, struct knote *);
+//int fbadop_stat (struct file *, struct stat *, struct lwp *);
+//int fbadop_ioctl (struct file *, u_long, void *, struct lwp *);
+__END_DECLS
+
+#endif
+
+#endif /* _PIF_KFILE_H_ */
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