usr/src/uts/common/sys/filep.h

   1 /*
   2  * CDDL HEADER START
   3  *
   4  * The contents of this file are subject to the terms of the
   5  * Common Development and Distribution License (the "License").
   6  * You may not use this file except in compliance with the License.
   7  *
   8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
   9  * or http://www.opensolaris.org/os/licensing.
  10  * See the License for the specific language governing permissions
  11  * and limitations under the License.
  12  *
  13  * When distributing Covered Code, include this CDDL HEADER in each
  14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  15  * If applicable, add the following below this CDDL HEADER, with the
  16  * fields enclosed by brackets "[]" replaced with your own identifying
  17  * information: Portions Copyright [yyyy] [name of copyright owner]
  18  *
  19  * CDDL HEADER END
  20  */
  21 /*
  22  * Copyright 2007 Sun Microsystems, Inc.  All rights reserved.
  23  * Use is subject to license terms.
  24  */
  25
  26 #ifndef _SYS_FILEP_H
  27 #define _SYS_FILEP_H
  28
  29 #pragma ident   "%Z%%M% %I%     %E% SMI"
  30
  31 #ifdef __cplusplus
  32 extern "C" {
  33 #endif
  34
  35 #include <sys/fs/ufs_fsdir.h>
  36 #include <sys/fs/ufs_fs.h>
  37 #include <sys/fs/ufs_inode.h>
  38
  39 /*
  40  *  These structs should be invisible to the caller of
  41  *  the user-level routines
  42  */
  43 typedef struct dev_ident {      /* device identifier block */
  44         char            *di_desc;
  45         int             di_dcookie;
  46         char            di_taken;
  47         union {
  48                 struct  fs      di_fs;
  49                 char    dummy[SBSIZE];
  50         }               un_fs;
  51 } devid_t;
  52
  53 /*
  54  * Borrowed bits from i_flag
  55  */
  56 #define FI_CACHED               0x100000
  57 #define FI_PARTIAL_CACHE        0x200000
  58 #define FI_NOCACHE              0x400000
  59
  60 #define FI_COMPRESSED           0x8             /* File compressed in ramdisk */
  61 #define DECOMP_BUFSIZE          (512 * 1024)    /* size of decompress buffer */
  62
  63 typedef struct file_ident {     /* file identifier block */
  64         uint_t          fi_filedes;
  65         char            *fi_path;
  66         daddr_t         fi_blocknum;
  67         uint_t          fi_count;
  68         off_t           fi_offset;
  69         caddr_t         fi_memp;
  70         char            fi_taken;
  71         char            fi_flags;
  72         devid_t         *fi_devp;
  73         char            fi_buf[MAXBSIZE];
  74         int             (*fi_getblock)(struct file_ident *);
  75         struct  inode   *fi_inode;
  76         struct file_ident *fi_forw;
  77         struct file_ident *fi_back;
  78         off_t           fi_cfoff;               /* compressed file offset */
  79         caddr_t         fi_dcscrbuf;            /* decomp scratch buffer */
  80         size_t          fi_dcscrused;           /* used bytes in scratch buf */
  81         struct z_stream_s *fi_dcstream;         /* decompression stream */
  82 }  fileid_t;
  83
  84 extern int diskread(fileid_t *);
  85
  86 #ifdef __cplusplus
  87 }
  88 #endif
  89
  90 #endif  /* _SYS_FILEP_H */