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