io/io.h

   1 /*
   2  * Copyright (c) 2003-2005 Silicon Graphics, Inc.
   3  * All Rights Reserved.
   4  *
   5  * This program is free software; you can redistribute it and/or
   6  * modify it under the terms of the GNU General Public License as
   7  * published by the Free Software Foundation.
   8  *
   9  * This program is distributed in the hope that it would be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License
  15  * along with this program; if not, write the Free Software Foundation,
  16  * Inc.,  51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
  17  */
  18
  19 #include "xfs.h"
  20
  21 /*
  22  * Read/write patterns (default is always "forward")
  23  */
  24 #define IO_RANDOM       ( 0)
  25 #define IO_FORWARD      ( 1)
  26 #define IO_BACKWARD     (-1)
  27
  28 /*
  29  * File descriptor options
  30  */
  31 #define IO_READONLY     (1<<0)
  32 #define IO_DIRECT       (1<<1)
  33 #define IO_REALTIME     (1<<2)
  34 #define IO_APPEND       (1<<3)
  35 #define IO_OSYNC        (1<<4)
  36 #define IO_CREAT        (1<<5)
  37 #define IO_TRUNC        (1<<6)
  38 #define IO_FOREIGN      (1<<7)
  39 #define IO_NONBLOCK     (1<<8)
  40 #define IO_TMPFILE      (1<<9)
  41
  42 /*
  43  * Regular file I/O control
  44  */
  45 typedef struct fileio {
  46         int             fd;             /* open file descriptor */
  47         int             flags;          /* flags describing file state */
  48         char            *name;          /* file name at time of open */
  49         xfs_fsop_geom_t geom;           /* XFS filesystem geometry */
  50 } fileio_t;
  51
  52 extern fileio_t         *filetable;     /* open file table */
  53 extern int              filecount;      /* number of open files */
  54 extern fileio_t         *file;          /* active file in file table */
  55 extern int filelist_f(void);
  56
  57 /*
  58  * Memory mapped file regions
  59  */
  60 typedef struct mmap_region {
  61         void            *addr;          /* address of start of mapping */
  62         size_t          length;         /* length of mapping */
  63         off64_t         offset;         /* start offset into backing file */
  64         int             prot;           /* protection mode of the mapping */
  65         char            *name;          /* name of backing file */
  66 } mmap_region_t;
  67
  68 extern mmap_region_t    *maptable;      /* mmap'd region array */
  69 extern int              mapcount;       /* #entries in the mapping table */
  70 extern mmap_region_t    *mapping;       /* active mapping table entry */
  71 extern int maplist_f(void);
  72 extern void *check_mapping_range(mmap_region_t *, off64_t, size_t, int);
  73
  74 /*
  75  * Various xfs_io helper routines/globals
  76  */
  77
  78 extern off64_t          filesize(void);
  79 extern int              openfile(char *, xfs_fsop_geom_t *, int, mode_t);
  80 extern int              addfile(char *, int , xfs_fsop_geom_t *, int);
  81 extern void             printxattr(uint, int, int, const char *, int, int);
  82
  83 extern unsigned int     recurse_all;
  84 extern unsigned int     recurse_dir;
  85
  86 extern void             *buffer;
  87 extern size_t           buffersize;
  88 extern int              vectors;
  89 extern struct iovec     *iov;
  90 extern int              alloc_buffer(size_t, int, unsigned int);
  91 extern int              read_buffer(int, off64_t, long long, long long *,
  92                                         int, int);
  93 extern void             dump_buffer(off64_t, ssize_t);
  94
  95 extern void             attr_init(void);
  96 extern void             bmap_init(void);
  97 extern void             file_init(void);
  98 extern void             flink_init(void);
  99 extern void             freeze_init(void);
 100 extern void             fsync_init(void);
 101 extern void             getrusage_init(void);
 102 extern void             help_init(void);
 103 extern void             imap_init(void);
 104 extern void             inject_init(void);
 105 extern void             mmap_init(void);
 106 extern void             open_init(void);
 107 extern void             parent_init(void);
 108 extern void             pread_init(void);
 109 extern void             prealloc_init(void);
 110 extern void             pwrite_init(void);
 111 extern void             quit_init(void);
 112 extern void             seek_init(void);
 113 extern void             shutdown_init(void);
 114 extern void             sync_init(void);
 115 extern void             truncate_init(void);
 116
 117 #ifdef HAVE_FADVISE
 118 extern void             fadvise_init(void);
 119 #else
 120 #define fadvise_init()  do { } while (0)
 121 #endif
 122
 123 #ifdef HAVE_RESBLKS
 124 extern void             resblks_init(void);
 125 #else
 126 #define resblks_init()  do { } while (0)
 127 #endif
 128
 129 #ifdef HAVE_SENDFILE
 130 extern void             sendfile_init(void);
 131 #else
 132 #define sendfile_init() do { } while (0)
 133 #endif
 134
 135 #ifdef HAVE_MADVISE
 136 extern void             madvise_init(void);
 137 #else
 138 #define madvise_init()  do { } while (0)
 139 #endif
 140
 141 #ifdef HAVE_MINCORE
 142 extern void             mincore_init(void);
 143 #else
 144 #define mincore_init()  do { } while (0)
 145 #endif
 146
 147 #ifdef HAVE_FIEMAP
 148 extern void             fiemap_init(void);
 149 #else
 150 #define fiemap_init()   do { } while (0)
 151 #endif
 152
 153 #ifdef HAVE_SYNC_FILE_RANGE
 154 extern void             sync_range_init(void);
 155 #else
 156 #define sync_range_init()       do { } while (0)
 157 #endif
 158
 159 #ifdef HAVE_READDIR
 160 extern void             readdir_init(void);
 161 #else
 162 #define readdir_init()          do { } while (0)
 163 #endif