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  1. /*
  2.  * Copyright (c) 2008 Jakub Jermar
  3.  * All rights reserved.
  4.  *
  5.  * Redistribution and use in source and binary forms, with or without
  6.  * modification, are permitted provided that the following conditions
  7.  * are met:
  8.  *
  9.  * - Redistributions of source code must retain the above copyright
  10.  *   notice, this list of conditions and the following disclaimer.
  11.  * - Redistributions in binary form must reproduce the above copyright
  12.  *   notice, this list of conditions and the following disclaimer in the
  13.  *   documentation and/or other materials provided with the distribution.
  14.  * - The name of the author may not be used to endorse or promote products
  15.  *   derived from this software without specific prior written permission.
  16.  *
  17.  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  18.  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  19.  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  20.  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  21.  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  22.  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  23.  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  24.  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  25.  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  26.  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  27.  */
  28.  
  29. /** @addtogroup fs
  30.  * @{
  31.  */
  32.  
  33. #ifndef TMPFS_TMPFS_H_
  34. #define TMPFS_TMPFS_H_
  35.  
  36. #include <ipc/ipc.h>
  37. #include <libfs.h>
  38. #include <atomic.h>
  39. #include <sys/types.h>
  40. #include <bool.h>
  41. #include <adt/hash_table.h>
  42.  
  43. #ifndef dprintf
  44. #define dprintf(...)    printf(__VA_ARGS__)
  45. #endif
  46.  
  47. #define TMPFS_NODE(node)    ((node) ? (tmpfs_node_t *)(node)->data : NULL)
  48. #define FS_NODE(node)       ((node) ? (node)->bp : NULL)
  49.  
  50. typedef enum {
  51.     TMPFS_NONE,
  52.     TMPFS_FILE,
  53.     TMPFS_DIRECTORY
  54. } tmpfs_dentry_type_t;
  55.  
  56. /* forward declaration */
  57. struct tmpfs_node;
  58.  
  59. typedef struct tmpfs_dentry {
  60.     link_t link;        /**< Linkage for the list of siblings. */
  61.     struct tmpfs_node *node;/**< Back pointer to TMPFS node. */
  62.     char *name;     /**< Name of dentry. */
  63. } tmpfs_dentry_t;
  64.  
  65. typedef struct tmpfs_node {
  66.     fs_node_t *bp;      /**< Back pointer to the FS node. */
  67.     fs_index_t index;   /**< TMPFS node index. */
  68.     dev_handle_t dev_handle;/**< Device handle. */
  69.     link_t nh_link;     /**< Nodes hash table link. */
  70.     tmpfs_dentry_type_t type;
  71.     unsigned lnkcnt;    /**< Link count. */
  72.     size_t size;        /**< File size if type is TMPFS_FILE. */
  73.     void *data;     /**< File content's if type is TMPFS_FILE. */
  74.     link_t cs_head;     /**< Head of child's siblings list. */
  75. } tmpfs_node_t;
  76.  
  77. extern fs_reg_t tmpfs_reg;
  78.  
  79. extern libfs_ops_t tmpfs_libfs_ops;
  80.  
  81. extern bool tmpfs_init(void);
  82.  
  83. extern void tmpfs_mounted(ipc_callid_t, ipc_call_t *);
  84. extern void tmpfs_mount(ipc_callid_t, ipc_call_t *);
  85. extern void tmpfs_lookup(ipc_callid_t, ipc_call_t *);
  86. extern void tmpfs_read(ipc_callid_t, ipc_call_t *);
  87. extern void tmpfs_write(ipc_callid_t, ipc_call_t *);
  88. extern void tmpfs_truncate(ipc_callid_t, ipc_call_t *);
  89. extern void tmpfs_stat(ipc_callid_t, ipc_call_t *);
  90. extern void tmpfs_close(ipc_callid_t, ipc_call_t *);
  91. extern void tmpfs_destroy(ipc_callid_t, ipc_call_t *);
  92. extern void tmpfs_open_node(ipc_callid_t, ipc_call_t *);
  93. extern void tmpfs_sync(ipc_callid_t, ipc_call_t *);
  94.  
  95. extern bool tmpfs_restore(dev_handle_t);
  96.  
  97. #endif
  98.  
  99. /**
  100.  * @}
  101.  */
  102.