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/*
 *  Header file for the In-Memory File System
 *
 *  COPYRIGHT (c) 1989-1999.
 *  On-Line Applications Research Corporation (OAR).
 *
 *  The license and distribution terms for this file may be
 *  found in the file LICENSE in this distribution or at
 *  http://www.OARcorp.com/rtems/license.html.
 *
 *  $Id: imfs.h,v 1.2 2001-09-27 12:01:15 chris Exp $
 */
 
#ifndef __IMFS_h
#define __IMFS_h
 
#ifdef __cplusplus
extern "C" {
#endif
 
#include <rtems.h>
#include <chain.h>
 
#include <sys/types.h>
#include <limits.h>
#include <rtems/libio.h>
 
/*
 *  File name macros
 */
 
#define IMFS_is_valid_name_char( _ch ) ( 1 )
 
#define IMFS_is_separator( _ch ) \
   rtems_filesystem_is_separator( _ch )
 
/*
 *  Data types
 */
 
struct IMFS_jnode_tt;
typedef struct IMFS_jnode_tt IMFS_jnode_t;
 
typedef struct {
  Chain_Control                          Entries;
  rtems_filesystem_mount_table_entry_t  *mt_fs;
}  IMFS_directory_t;
 
typedef struct {
  rtems_device_major_number  major;
  rtems_device_minor_number  minor;
}  IMFS_device_t;
 
typedef struct {
  IMFS_jnode_t  *link_node;
} IMFS_link_t;
 
typedef struct {
  const char *name;
} IMFS_sym_link_t;
 
/*
 *  IMFS "memfile" information
 *
 *  The data structure for the in-memory "memfiles" is based on classic UNIX.
 *
 *  block_ptr is a pointer to a block of IMFS_MEMFILE_BYTES_PER_BLOCK in
 *  length which could be data or a table of pointers to blocks.
 *
 *  Setting IMFS_MEMFILE_BYTES_PER_BLOCK to different values has a significant
 *  impact on the maximum file size supported as well as the amount of
 *  memory wasted due to internal file fragmentation.  The following
 *  is a list of maximum file sizes based on various settings
 *
 *    max_filesize with blocks of   16 is         1,328
 *    max_filesize with blocks of   32 is        18,656
 *    max_filesize with blocks of   64 is       279,488
 *    max_filesize with blocks of  128 is     4,329,344
 *    max_filesize with blocks of  256 is    68,173,568
 *    max_filesize with blocks of  512 is 1,082,195,456
 */
 
#define IMFS_MEMFILE_BYTES_PER_BLOCK     128
#define IMFS_MEMFILE_BLOCK_SLOTS \
  (IMFS_MEMFILE_BYTES_PER_BLOCK / sizeof(void *))
 
typedef unsigned char * block_p;
typedef block_p *block_ptr;
 
typedef struct {
  off_t      size;             /* size of file in bytes */
  block_ptr  indirect;         /* array of 128 data blocks pointers */
  block_ptr  doubly_indirect;  /* 128 indirect blocks */
  block_ptr  triply_indirect;  /* 128 doubly indirect blocks */
} IMFS_memfile_t;
 
/*
 *  Important block numbers for "memfiles"
 */
 
#define FIRST_INDIRECT           (0)
#define LAST_INDIRECT            (IMFS_MEMFILE_BLOCK_SLOTS - 1)
 
#define FIRST_DOUBLY_INDIRECT    (LAST_INDIRECT + 1)
#define LAST_DOUBLY_INDIRECT     \
   (LAST_INDIRECT + \
     (IMFS_MEMFILE_BLOCK_SLOTS * IMFS_MEMFILE_BLOCK_SLOTS))
 
#define FIRST_TRIPLY_INDIRECT    (LAST_DOUBLY_INDIRECT + 1)
#define LAST_TRIPLY_INDIRECT \
   (LAST_DOUBLY_INDIRECT +\
     (IMFS_MEMFILE_BLOCK_SLOTS * \
        IMFS_MEMFILE_BLOCK_SLOTS * IMFS_MEMFILE_BLOCK_SLOTS))
 
#define IMFS_MEMFILE_MAXIMUM_SIZE \
  (LAST_TRIPLY_INDIRECT * IMFS_MEMFILE_BYTES_PER_BLOCK)
 
/*
 *  What types of IMFS file systems entities there can be.
 */
 
#define IMFS_jnode_types_t rtems_filesystem_node_types_t
#define IMFS_DIRECTORY     RTEMS_FILESYSTEM_DIRECTORY
#define IMFS_DEVICE        RTEMS_FILESYSTEM_DEVICE
#define IMFS_HARD_LINK     RTEMS_FILESYSTEM_HARD_LINK
#define IMFS_SYM_LINK      RTEMS_FILESYSTEM_SYM_LINK
#define IMFS_MEMORY_FILE   RTEMS_FILESYSTEM_MEMORY_FILE
 
#define IMFS_NUMBER_OF_TYPES  (IMFS_MEMORY_FILE + 1)
 
typedef union {
  IMFS_directory_t   directory;
  IMFS_device_t      device;
  IMFS_link_t        hard_link;
  IMFS_sym_link_t    sym_link;
  IMFS_memfile_t     file;
} IMFS_types_union;
 
/*
 *  Maximum length of a "basename" of an IMFS file/node.
 */
 
#define IMFS_NAME_MAX  32
 
/*
 *  The control structure for an IMFS jnode.
 */
 
struct IMFS_jnode_tt {
  Chain_Node          Node;                  /* for chaining them together */
  IMFS_jnode_t       *Parent;                /* Parent node */
  char                name[IMFS_NAME_MAX+1]; /* "basename" */
  mode_t              st_mode;               /* File mode */
  nlink_t             st_nlink;              /* Link count */
  ino_t               st_ino;                /* inode */
 
  uid_t               st_uid;                /* User ID of owner */
  gid_t               st_gid;                /* Group ID of owner */
 
  time_t              stat_atime;            /* Time of last access */
  time_t              stat_mtime;            /* Time of last modification */
  time_t              stat_ctime;            /* Time of last status change */
  IMFS_jnode_types_t  type;                  /* Type of this entry */
  IMFS_types_union    info;
};
 
#define IMFS_update_atime( _jnode )         \
  do {                                      \
    struct timeval tv;                      \
    gettimeofday( &tv, 0 );                 \
    _jnode->stat_atime  = (time_t) tv.tv_sec; \
  } while (0)
 
#define IMFS_update_mtime( _jnode )         \
  do {                                      \
    struct timeval tv;                      \
    gettimeofday( &tv, 0 );                 \
    _jnode->stat_mtime  = (time_t) tv.tv_sec; \
  } while (0)
 
#define IMFS_update_ctime( _jnode )         \
  do {                                      \
    struct timeval tv;                      \
    gettimeofday( &tv, 0 );                 \
    _jnode->stat_ctime  = (time_t) tv.tv_sec; \
  } while (0)
 
#define IMFS_atime_mtime_update( _jnode )   \
  do {                                      \
    struct timeval tv;                      \
    gettimeofday( &tv, 0 );                 \
    _jnode->stat_mtime  = (time_t) tv.tv_sec; \
    _jnode->stat_atime  = (time_t) tv.tv_sec; \
  } while (0)
 
typedef struct {
  ino_t                             ino_count;
  rtems_filesystem_file_handlers_r *memfile_handlers;
  rtems_filesystem_file_handlers_r *directory_handlers;
} IMFS_fs_info_t;
 
#define increment_and_check_linkcounts( _fs_info )                  \
  ((IMFS_fs_info_t * )_fs_info)->link_counts++;                     \
  if ( ((IMFS_fs_info_t * )_fs_info)->link_counts  > MAXSYMLINKS )  \
    set_errno_and_return_minus_one( ELOOP )
 
#define decrement_linkcounts(  _fs_info )             \
  ((IMFS_fs_info_t * )_fs_info)->link_counts--;
 
/*
 *  Type defination for tokens returned from IMFS_get_token
 */
 
typedef enum {
  IMFS_NO_MORE_PATH,
  IMFS_CURRENT_DIR,
  IMFS_UP_DIR,
  IMFS_NAME,
  IMFS_INVALID_TOKEN
} IMFS_token_types;
 
/*
 *  Shared Data
 */
 
extern rtems_filesystem_file_handlers_r       IMFS_directory_handlers;
extern rtems_filesystem_file_handlers_r       IMFS_device_handlers;
extern rtems_filesystem_file_handlers_r       IMFS_link_handlers;
extern rtems_filesystem_file_handlers_r       IMFS_memfile_handlers;
extern rtems_filesystem_operations_table      IMFS_ops;
extern rtems_filesystem_operations_table      miniIMFS_ops;
extern rtems_filesystem_limits_and_options_t  IMFS_LIMITS_AND_OPTIONS;
 
/*
 *  Routines
 */
 
int IMFS_initialize(
   rtems_filesystem_mount_table_entry_t *mt_entry
);
 
int miniIMFS_initialize(
   rtems_filesystem_mount_table_entry_t *mt_entry
);
 
int IMFS_initialize_support(
   rtems_filesystem_mount_table_entry_t *mt_entry,
   rtems_filesystem_operations_table    *op_table,
   rtems_filesystem_file_handlers_r     *memfile_handlers,
   rtems_filesystem_file_handlers_r     *directory_handlers
);
 
int IMFS_fsunmount(
   rtems_filesystem_mount_table_entry_t *mt_entry
);
 
 
/*
 * Returns the number of characters copied from path to token.
 */
IMFS_token_types IMFS_get_token(
  const char       *path,
  char             *token,
  int              *token_len
);
 
void IMFS_dump( void );
 
void IMFS_initialize_jnode(
  IMFS_jnode_t        *the_jnode,
  IMFS_jnode_types_t   type,
  IMFS_jnode_t        *the_parent,
  char                *name,
  mode_t               mode
);
 
IMFS_jnode_t *IMFS_find_match_in_dir(
  IMFS_jnode_t *directory,                         /* IN */
  char         *name                               /* IN */
);
 
rtems_filesystem_node_types_t IMFS_node_type(
  rtems_filesystem_location_info_t    *pathloc     /* IN */
);
 
int IMFS_stat(
  rtems_filesystem_location_info_t *loc,           /* IN  */
  struct stat                      *buf            /* OUT */
);
 
int IMFS_Set_handlers(
  rtems_filesystem_location_info_t   *loc
);
 
int IMFS_evaluate_link(
  rtems_filesystem_location_info_t *node,        /* IN/OUT */
  int                               flags        /* IN     */
);
 
int IMFS_eval_path(
  const char                        *pathname,     /* IN     */
  int                               flags,         /* IN     */
  rtems_filesystem_location_info_t  *pathloc       /* IN/OUT */
);
 
 
int IMFS_link(
  rtems_filesystem_location_info_t  *to_loc,      /* IN */
  rtems_filesystem_location_info_t  *parent_loc,  /* IN */
  const char                        *token        /* IN */
);
 
int IMFS_unlink(
  rtems_filesystem_location_info_t  *pathloc       /* IN */
);
 
int IMFS_chown(
  rtems_filesystem_location_info_t  *pathloc,      /* IN */
  uid_t                              owner,        /* IN */
  gid_t                              group         /* IN */
);
 
int IMFS_freenodinfo(
  rtems_filesystem_location_info_t  *pathloc       /* IN */
);
 
int IMFS_mknod(
  const char                        *path,         /* IN */
  mode_t                             mode,         /* IN */
  dev_t                              dev,          /* IN */
  rtems_filesystem_location_info_t  *pathloc       /* IN/OUT */
);
 
IMFS_jnode_t *IMFS_create_node(
  rtems_filesystem_location_info_t  *parent_loc,   /* IN  */
  IMFS_jnode_types_t                 type,         /* IN  */
  char                              *name,         /* IN  */
  mode_t                             mode,         /* IN  */
  IMFS_types_union                  *info          /* IN  */
);
 
int IMFS_evaluate_for_make(
  const char                         *path,        /* IN     */
  rtems_filesystem_location_info_t   *pathloc,     /* IN/OUT */
  const char                        **name         /* OUT    */
);
 
int IMFS_mount(
  rtems_filesystem_mount_table_entry_t *mt_entry  /* IN */
);
 
int IMFS_unmount(
  rtems_filesystem_mount_table_entry_t *mt_entry  /* IN */
);
 
int IMFS_freenod(
  rtems_filesystem_location_info_t  *node         /* IN/OUT */
);
 
int IMFS_memfile_remove(
 IMFS_jnode_t  *the_jnode         /* IN/OUT */
);
 
int memfile_ftruncate(
  rtems_libio_t *iop,               /* IN  */
  off_t          length             /* IN  */
);
 
int imfs_dir_open(
  rtems_libio_t *iop,             /* IN  */
  const char    *pathname,        /* IN  */
  unsigned32     flag,            /* IN  */
  unsigned32     mode             /* IN  */
);
 
int imfs_dir_close(
  rtems_libio_t *iop             /* IN  */
);
 
int imfs_dir_read(
  rtems_libio_t *iop,              /* IN  */
  void          *buffer,           /* IN  */
  unsigned32     count             /* IN  */
);
 
int imfs_dir_lseek(
  rtems_libio_t        *iop,              /* IN  */
  off_t                 offset,           /* IN  */
  int                   whence            /* IN  */
);
 
int imfs_dir_fstat(
  rtems_filesystem_location_info_t *loc,         /* IN  */
  struct stat                      *buf          /* OUT */
);
 
int imfs_dir_rmnod(
  rtems_filesystem_location_info_t      *pathloc       /* IN */
);
 
int memfile_open(
  rtems_libio_t *iop,             /* IN  */
  const char    *pathname,        /* IN  */
  unsigned32     flag,            /* IN  */
  unsigned32     mode             /* IN  */
);
 
int memfile_close(
  rtems_libio_t *iop             /* IN  */
);
 
int memfile_read(
  rtems_libio_t *iop,             /* IN  */
  void          *buffer,          /* IN  */
  unsigned32     count            /* IN  */
);
 
int memfile_write(
  rtems_libio_t *iop,             /* IN  */
  const void    *buffer,          /* IN  */
  unsigned32     count            /* IN  */
);
 
int memfile_ioctl(
  rtems_libio_t *iop,             /* IN  */
  unsigned32     command,         /* IN  */
  void          *buffer           /* IN  */
);
 
int memfile_lseek(
  rtems_libio_t        *iop,        /* IN  */
  off_t                 offset,     /* IN  */
  int                   whence      /* IN  */
);
 
int memfile_rmnod(
  rtems_filesystem_location_info_t      *pathloc       /* IN */
);
 
int device_open(
  rtems_libio_t *iop,            /* IN  */
  const char    *pathname,       /* IN  */
  unsigned32     flag,           /* IN  */
  unsigned32     mode            /* IN  */
);
 
int device_close(
  rtems_libio_t *iop             /* IN  */
);
 
int device_read(
  rtems_libio_t *iop,            /* IN  */
  void          *buffer,         /* IN  */
  unsigned32     count           /* IN  */
);
 
int device_write(
  rtems_libio_t *iop,               /* IN  */
  const void    *buffer,            /* IN  */
  unsigned32     count              /* IN  */
);
 
int device_ioctl(
  rtems_libio_t *iop,               /* IN  */
  unsigned32     command,           /* IN  */
  void          *buffer             /* IN  */
);
 
int device_lseek(
  rtems_libio_t *iop,               /* IN  */
  off_t          offset,            /* IN  */
  int            whence             /* IN  */
);
 
int IMFS_utime(
  rtems_filesystem_location_info_t  *pathloc,       /* IN */
  time_t                             actime,        /* IN */
  time_t                             modtime        /* IN */
);
 
int IMFS_fchmod(
  rtems_filesystem_location_info_t *loc,
  mode_t                            mode
);
 
int IMFS_symlink(
  rtems_filesystem_location_info_t  *parent_loc,  /* IN */
  const char                        *link_name,
  const char                        *node_name
);
 
int IMFS_readlink(
 rtems_filesystem_location_info_t   *loc,         /* IN */
 char                               *buf,         /* OUT */
 size_t                             bufsize
);
 
int IMFS_fdatasync(
  rtems_libio_t *iop
);
 
int IMFS_fcntl(
  int            cmd,
  rtems_libio_t *iop
);
 
int IMFS_rmnod(
  rtems_filesystem_location_info_t      *pathloc       /* IN */
);
 
#ifdef __cplusplus
}
#endif
 
#endif
/* end of include file */

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[/] [or1k/] [trunk/] [rtems/] [c/] [src/] [lib/] [libc/] [imfs.h] - Blame information for rev 1765

Line No.	Rev	Author	Line
1	158	chris	`/*`
2			`* Header file for the In-Memory File System`
3			`*`
4			`* COPYRIGHT (c) 1989-1999.`
5			`* On-Line Applications Research Corporation (OAR).`
6			`*`
7			`* The license and distribution terms for this file may be`
8			`* found in the file LICENSE in this distribution or at`
9			`* http://www.OARcorp.com/rtems/license.html.`
10			`*`
11	208	chris	`* $Id: imfs.h,v 1.2 2001-09-27 12:01:15 chris Exp $`
12	158	chris	`*/`
13
14			`#ifndef __IMFS_h`
15			`#define __IMFS_h`
16
17			`#ifdef __cplusplus`
18			`extern "C" {`
19			`#endif`
20
21			`#include <rtems.h>`
22			`#include <chain.h>`
23
24			`#include <sys/types.h>`
25			`#include <limits.h>`
26			`#include <rtems/libio.h>`
27
28			`/*`
29			`* File name macros`
30			`*/`
31
32			`#define IMFS_is_valid_name_char( _ch ) ( 1 )`
33
34			`#define IMFS_is_separator( _ch ) \`
35			`rtems_filesystem_is_separator( _ch )`
36
37			`/*`
38			`* Data types`
39			`*/`
40
41			`struct IMFS_jnode_tt;`
42			`typedef struct IMFS_jnode_tt IMFS_jnode_t;`
43
44			`typedef struct {`
45			`Chain_Control Entries;`
46			`rtems_filesystem_mount_table_entry_t *mt_fs;`
47			`} IMFS_directory_t;`
48
49			`typedef struct {`
50			`rtems_device_major_number major;`
51			`rtems_device_minor_number minor;`
52			`} IMFS_device_t;`
53
54			`typedef struct {`
55			`IMFS_jnode_t *link_node;`
56			`} IMFS_link_t;`
57
58			`typedef struct {`
59			`const char *name;`
60			`} IMFS_sym_link_t;`
61
62			`/*`
63			`* IMFS "memfile" information`
64			`*`
65			`* The data structure for the in-memory "memfiles" is based on classic UNIX.`
66			`*`
67			`* block_ptr is a pointer to a block of IMFS_MEMFILE_BYTES_PER_BLOCK in`
68			`* length which could be data or a table of pointers to blocks.`
69			`*`
70			`* Setting IMFS_MEMFILE_BYTES_PER_BLOCK to different values has a significant`
71			`* impact on the maximum file size supported as well as the amount of`
72			`* memory wasted due to internal file fragmentation. The following`
73			`* is a list of maximum file sizes based on various settings`
74			`*`
75			`* max_filesize with blocks of 16 is 1,328`
76			`* max_filesize with blocks of 32 is 18,656`
77			`* max_filesize with blocks of 64 is 279,488`
78			`* max_filesize with blocks of 128 is 4,329,344`
79			`* max_filesize with blocks of 256 is 68,173,568`
80			`* max_filesize with blocks of 512 is 1,082,195,456`
81			`*/`
82
83			`#define IMFS_MEMFILE_BYTES_PER_BLOCK 128`
84			`#define IMFS_MEMFILE_BLOCK_SLOTS \`
85			`(IMFS_MEMFILE_BYTES_PER_BLOCK / sizeof(void *))`
86
87			`typedef unsigned char * block_p;`
88			`typedef block_p *block_ptr;`
89
90			`typedef struct {`
91			`off_t size; /* size of file in bytes */`
92			`block_ptr indirect; /* array of 128 data blocks pointers */`
93			`block_ptr doubly_indirect; /* 128 indirect blocks */`
94			`block_ptr triply_indirect; /* 128 doubly indirect blocks */`
95			`} IMFS_memfile_t;`
96
97			`/*`
98			`* Important block numbers for "memfiles"`
99			`*/`
100
101			`#define FIRST_INDIRECT (0)`
102			`#define LAST_INDIRECT (IMFS_MEMFILE_BLOCK_SLOTS - 1)`
103
104			`#define FIRST_DOUBLY_INDIRECT (LAST_INDIRECT + 1)`
105			`#define LAST_DOUBLY_INDIRECT \`
106			`(LAST_INDIRECT + \`
107			`(IMFS_MEMFILE_BLOCK_SLOTS * IMFS_MEMFILE_BLOCK_SLOTS))`
108
109			`#define FIRST_TRIPLY_INDIRECT (LAST_DOUBLY_INDIRECT + 1)`
110			`#define LAST_TRIPLY_INDIRECT \`
111			`(LAST_DOUBLY_INDIRECT +\`
112			`(IMFS_MEMFILE_BLOCK_SLOTS * \`
113			`IMFS_MEMFILE_BLOCK_SLOTS * IMFS_MEMFILE_BLOCK_SLOTS))`
114
115			`#define IMFS_MEMFILE_MAXIMUM_SIZE \`
116			`(LAST_TRIPLY_INDIRECT * IMFS_MEMFILE_BYTES_PER_BLOCK)`
117
118			`/*`
119			`* What types of IMFS file systems entities there can be.`
120			`*/`
121
122			`#define IMFS_jnode_types_t rtems_filesystem_node_types_t`
123			`#define IMFS_DIRECTORY RTEMS_FILESYSTEM_DIRECTORY`
124			`#define IMFS_DEVICE RTEMS_FILESYSTEM_DEVICE`
125			`#define IMFS_HARD_LINK RTEMS_FILESYSTEM_HARD_LINK`
126			`#define IMFS_SYM_LINK RTEMS_FILESYSTEM_SYM_LINK`
127			`#define IMFS_MEMORY_FILE RTEMS_FILESYSTEM_MEMORY_FILE`
128
129			`#define IMFS_NUMBER_OF_TYPES (IMFS_MEMORY_FILE + 1)`
130
131			`typedef union {`
132			`IMFS_directory_t directory;`
133			`IMFS_device_t device;`
134			`IMFS_link_t hard_link;`
135			`IMFS_sym_link_t sym_link;`
136			`IMFS_memfile_t file;`
137			`} IMFS_types_union;`
138
139			`/*`
140			`* Maximum length of a "basename" of an IMFS file/node.`
141			`*/`
142
143			`#define IMFS_NAME_MAX 32`
144
145			`/*`
146			`* The control structure for an IMFS jnode.`
147			`*/`
148
149			`struct IMFS_jnode_tt {`
150			`Chain_Node Node; /* for chaining them together */`
151			`IMFS_jnode_t Parent; / Parent node */`
152			`char name[IMFS_NAME_MAX+1]; /* "basename" */`
153			`mode_t st_mode; /* File mode */`
154			`nlink_t st_nlink; /* Link count */`
155			`ino_t st_ino; /* inode */`
156
157			`uid_t st_uid; /* User ID of owner */`
158			`gid_t st_gid; /* Group ID of owner */`
159
160			`time_t stat_atime; /* Time of last access */`
161			`time_t stat_mtime; /* Time of last modification */`
162			`time_t stat_ctime; /* Time of last status change */`
163			`IMFS_jnode_types_t type; /* Type of this entry */`
164			`IMFS_types_union info;`
165			`};`
166
167			`#define IMFS_update_atime( _jnode ) \`
168			`do { \`
169			`struct timeval tv; \`
170			`gettimeofday( &tv, 0 ); \`
171			`_jnode->stat_atime = (time_t) tv.tv_sec; \`
172			`} while (0)`
173
174			`#define IMFS_update_mtime( _jnode ) \`
175			`do { \`
176			`struct timeval tv; \`
177			`gettimeofday( &tv, 0 ); \`
178			`_jnode->stat_mtime = (time_t) tv.tv_sec; \`
179			`} while (0)`
180
181			`#define IMFS_update_ctime( _jnode ) \`
182			`do { \`
183			`struct timeval tv; \`
184			`gettimeofday( &tv, 0 ); \`
185			`_jnode->stat_ctime = (time_t) tv.tv_sec; \`
186			`} while (0)`
187
188			`#define IMFS_atime_mtime_update( _jnode ) \`
189			`do { \`
190			`struct timeval tv; \`
191			`gettimeofday( &tv, 0 ); \`
192			`_jnode->stat_mtime = (time_t) tv.tv_sec; \`
193			`_jnode->stat_atime = (time_t) tv.tv_sec; \`
194			`} while (0)`
195
196			`typedef struct {`
197			`ino_t ino_count;`
198			`rtems_filesystem_file_handlers_r *memfile_handlers;`
199			`rtems_filesystem_file_handlers_r *directory_handlers;`
200			`} IMFS_fs_info_t;`
201
202			`#define increment_and_check_linkcounts( _fs_info ) \`
203			`((IMFS_fs_info_t * )_fs_info)->link_counts++; \`
204			`if ( ((IMFS_fs_info_t * )_fs_info)->link_counts > MAXSYMLINKS ) \`
205			`set_errno_and_return_minus_one( ELOOP )`
206
207			`#define decrement_linkcounts( _fs_info ) \`
208			`((IMFS_fs_info_t * )_fs_info)->link_counts--;`
209
210			`/*`
211			`* Type defination for tokens returned from IMFS_get_token`
212			`*/`
213
214			`typedef enum {`
215			`IMFS_NO_MORE_PATH,`
216			`IMFS_CURRENT_DIR,`
217			`IMFS_UP_DIR,`
218			`IMFS_NAME,`
219			`IMFS_INVALID_TOKEN`
220			`} IMFS_token_types;`
221
222			`/*`
223			`* Shared Data`
224			`*/`
225
226			`extern rtems_filesystem_file_handlers_r IMFS_directory_handlers;`
227			`extern rtems_filesystem_file_handlers_r IMFS_device_handlers;`
228			`extern rtems_filesystem_file_handlers_r IMFS_link_handlers;`
229			`extern rtems_filesystem_file_handlers_r IMFS_memfile_handlers;`
230			`extern rtems_filesystem_operations_table IMFS_ops;`
231			`extern rtems_filesystem_operations_table miniIMFS_ops;`
232			`extern rtems_filesystem_limits_and_options_t IMFS_LIMITS_AND_OPTIONS;`
233
234			`/*`
235			`* Routines`
236			`*/`
237
238			`int IMFS_initialize(`
239			`rtems_filesystem_mount_table_entry_t *mt_entry`
240			`);`
241
242			`int miniIMFS_initialize(`
243			`rtems_filesystem_mount_table_entry_t *mt_entry`
244			`);`
245
246			`int IMFS_initialize_support(`
247			`rtems_filesystem_mount_table_entry_t *mt_entry,`
248			`rtems_filesystem_operations_table *op_table,`
249			`rtems_filesystem_file_handlers_r *memfile_handlers,`
250			`rtems_filesystem_file_handlers_r *directory_handlers`
251			`);`
252
253			`int IMFS_fsunmount(`
254			`rtems_filesystem_mount_table_entry_t *mt_entry`
255			`);`
256
257
258			`/*`
259			`* Returns the number of characters copied from path to token.`
260			`*/`
261			`IMFS_token_types IMFS_get_token(`
262			`const char *path,`
263			`char *token,`
264			`int *token_len`
265			`);`
266
267			`void IMFS_dump( void );`
268
269			`void IMFS_initialize_jnode(`
270			`IMFS_jnode_t *the_jnode,`
271			`IMFS_jnode_types_t type,`
272			`IMFS_jnode_t *the_parent,`
273			`char *name,`
274			`mode_t mode`
275			`);`
276
277			`IMFS_jnode_t *IMFS_find_match_in_dir(`
278			`IMFS_jnode_t directory, / IN */`
279			`char name / IN */`
280			`);`
281
282			`rtems_filesystem_node_types_t IMFS_node_type(`
283			`rtems_filesystem_location_info_t pathloc / IN */`
284			`);`
285
286			`int IMFS_stat(`
287			`rtems_filesystem_location_info_t loc, / IN */`
288			`struct stat buf / OUT */`
289			`);`
290
291			`int IMFS_Set_handlers(`
292			`rtems_filesystem_location_info_t *loc`
293			`);`
294
295			`int IMFS_evaluate_link(`
296			`rtems_filesystem_location_info_t node, / IN/OUT */`
297			`int flags /* IN */`
298			`);`
299
300			`int IMFS_eval_path(`
301			`const char pathname, / IN */`
302			`int flags, /* IN */`
303			`rtems_filesystem_location_info_t pathloc / IN/OUT */`
304			`);`
305
306
307			`int IMFS_link(`
308			`rtems_filesystem_location_info_t to_loc, / IN */`
309			`rtems_filesystem_location_info_t parent_loc, / IN */`
310			`const char token / IN */`
311			`);`
312
313			`int IMFS_unlink(`
314			`rtems_filesystem_location_info_t pathloc / IN */`
315			`);`
316
317			`int IMFS_chown(`
318			`rtems_filesystem_location_info_t pathloc, / IN */`
319			`uid_t owner, /* IN */`
320			`gid_t group /* IN */`
321			`);`
322
323			`int IMFS_freenodinfo(`
324			`rtems_filesystem_location_info_t pathloc / IN */`
325			`);`
326
327			`int IMFS_mknod(`
328			`const char path, / IN */`
329			`mode_t mode, /* IN */`
330			`dev_t dev, /* IN */`
331			`rtems_filesystem_location_info_t pathloc / IN/OUT */`
332			`);`
333
334			`IMFS_jnode_t *IMFS_create_node(`
335			`rtems_filesystem_location_info_t parent_loc, / IN */`
336			`IMFS_jnode_types_t type, /* IN */`
337			`char name, / IN */`
338			`mode_t mode, /* IN */`
339			`IMFS_types_union info / IN */`
340			`);`
341
342			`int IMFS_evaluate_for_make(`
343			`const char path, / IN */`
344			`rtems_filesystem_location_info_t pathloc, / IN/OUT */`
345			`const char *name / OUT */`
346			`);`
347
348			`int IMFS_mount(`
349			`rtems_filesystem_mount_table_entry_t mt_entry / IN */`
350			`);`
351
352			`int IMFS_unmount(`
353			`rtems_filesystem_mount_table_entry_t mt_entry / IN */`
354			`);`
355
356			`int IMFS_freenod(`
357			`rtems_filesystem_location_info_t node / IN/OUT */`
358			`);`
359
360			`int IMFS_memfile_remove(`
361			`IMFS_jnode_t the_jnode / IN/OUT */`
362			`);`
363
364			`int memfile_ftruncate(`
365			`rtems_libio_t iop, / IN */`
366			`off_t length /* IN */`
367			`);`
368
369			`int imfs_dir_open(`
370			`rtems_libio_t iop, / IN */`
371			`const char pathname, / IN */`
372			`unsigned32 flag, /* IN */`
373			`unsigned32 mode /* IN */`
374			`);`
375
376			`int imfs_dir_close(`
377			`rtems_libio_t iop / IN */`
378			`);`
379
380			`int imfs_dir_read(`
381			`rtems_libio_t iop, / IN */`
382			`void buffer, / IN */`
383			`unsigned32 count /* IN */`
384			`);`
385
386			`int imfs_dir_lseek(`
387			`rtems_libio_t iop, / IN */`
388			`off_t offset, /* IN */`
389			`int whence /* IN */`
390			`);`
391
392			`int imfs_dir_fstat(`
393			`rtems_filesystem_location_info_t loc, / IN */`
394			`struct stat buf / OUT */`
395			`);`
396
397			`int imfs_dir_rmnod(`
398			`rtems_filesystem_location_info_t pathloc / IN */`
399			`);`
400
401			`int memfile_open(`
402			`rtems_libio_t iop, / IN */`
403			`const char pathname, / IN */`
404			`unsigned32 flag, /* IN */`
405			`unsigned32 mode /* IN */`
406			`);`
407
408			`int memfile_close(`
409			`rtems_libio_t iop / IN */`
410			`);`
411
412			`int memfile_read(`
413			`rtems_libio_t iop, / IN */`
414			`void buffer, / IN */`
415			`unsigned32 count /* IN */`
416			`);`
417
418			`int memfile_write(`
419			`rtems_libio_t iop, / IN */`
420			`const void buffer, / IN */`
421			`unsigned32 count /* IN */`
422			`);`
423
424			`int memfile_ioctl(`
425			`rtems_libio_t iop, / IN */`
426			`unsigned32 command, /* IN */`
427			`void buffer / IN */`
428			`);`
429
430			`int memfile_lseek(`
431			`rtems_libio_t iop, / IN */`
432			`off_t offset, /* IN */`
433			`int whence /* IN */`
434			`);`
435
436			`int memfile_rmnod(`
437			`rtems_filesystem_location_info_t pathloc / IN */`
438			`);`
439
440			`int device_open(`
441			`rtems_libio_t iop, / IN */`
442			`const char pathname, / IN */`
443			`unsigned32 flag, /* IN */`
444			`unsigned32 mode /* IN */`
445			`);`
446
447			`int device_close(`
448			`rtems_libio_t iop / IN */`
449			`);`
450
451			`int device_read(`
452			`rtems_libio_t iop, / IN */`
453			`void buffer, / IN */`
454			`unsigned32 count /* IN */`
455			`);`
456
457			`int device_write(`
458			`rtems_libio_t iop, / IN */`
459			`const void buffer, / IN */`
460			`unsigned32 count /* IN */`
461			`);`
462
463			`int device_ioctl(`
464			`rtems_libio_t iop, / IN */`
465			`unsigned32 command, /* IN */`
466			`void buffer / IN */`
467			`);`
468
469			`int device_lseek(`
470			`rtems_libio_t iop, / IN */`
471			`off_t offset, /* IN */`
472			`int whence /* IN */`
473			`);`
474
475			`int IMFS_utime(`
476			`rtems_filesystem_location_info_t pathloc, / IN */`
477			`time_t actime, /* IN */`
478			`time_t modtime /* IN */`
479			`);`
480
481			`int IMFS_fchmod(`
482			`rtems_filesystem_location_info_t *loc,`
483			`mode_t mode`
484			`);`
485
486			`int IMFS_symlink(`
487			`rtems_filesystem_location_info_t parent_loc, / IN */`
488			`const char *link_name,`
489			`const char *node_name`
490			`);`
491
492			`int IMFS_readlink(`
493			`rtems_filesystem_location_info_t loc, / IN */`
494			`char buf, / OUT */`
495			`size_t bufsize`
496			`);`
497
498			`int IMFS_fdatasync(`
499			`rtems_libio_t *iop`
500			`);`
501
502			`int IMFS_fcntl(`
503			`int cmd,`
504			`rtems_libio_t *iop`
505			`);`
506
507			`int IMFS_rmnod(`
508			`rtems_filesystem_location_info_t pathloc / IN */`
509			`);`
510
511			`#ifdef __cplusplus`
512			`}`
513			`#endif`
514
515			`#endif`
516			`/* end of include file */`