| 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 <libfs.h>
|
|---|
| 37 | #include <atomic.h>
|
|---|
| 38 | #include <sys/types.h>
|
|---|
| 39 | #include <bool.h>
|
|---|
| 40 | #include <adt/hash_table.h>
|
|---|
| 41 |
|
|---|
| 42 | #define TMPFS_NODE(node) ((node) ? (tmpfs_node_t *)(node)->data : NULL)
|
|---|
| 43 | #define FS_NODE(node) ((node) ? (node)->bp : NULL)
|
|---|
| 44 |
|
|---|
| 45 | typedef enum {
|
|---|
| 46 | TMPFS_NONE,
|
|---|
| 47 | TMPFS_FILE,
|
|---|
| 48 | TMPFS_DIRECTORY
|
|---|
| 49 | } tmpfs_dentry_type_t;
|
|---|
| 50 |
|
|---|
| 51 | /* forward declaration */
|
|---|
| 52 | struct tmpfs_node;
|
|---|
| 53 |
|
|---|
| 54 | typedef struct tmpfs_dentry {
|
|---|
| 55 | link_t link; /**< Linkage for the list of siblings. */
|
|---|
| 56 | struct tmpfs_node *node;/**< Back pointer to TMPFS node. */
|
|---|
| 57 | char *name; /**< Name of dentry. */
|
|---|
| 58 | } tmpfs_dentry_t;
|
|---|
| 59 |
|
|---|
| 60 | typedef struct tmpfs_node {
|
|---|
| 61 | fs_node_t *bp; /**< Back pointer to the FS node. */
|
|---|
| 62 | fs_index_t index; /**< TMPFS node index. */
|
|---|
| 63 | service_id_t service_id;/**< Service ID of block device. */
|
|---|
| 64 | link_t nh_link; /**< Nodes hash table link. */
|
|---|
| 65 | tmpfs_dentry_type_t type;
|
|---|
| 66 | unsigned lnkcnt; /**< Link count. */
|
|---|
| 67 | size_t size; /**< File size if type is TMPFS_FILE. */
|
|---|
| 68 | void *data; /**< File content's if type is TMPFS_FILE. */
|
|---|
| 69 | list_t cs_list; /**< Child's siblings list. */
|
|---|
| 70 | } tmpfs_node_t;
|
|---|
| 71 |
|
|---|
| 72 | extern vfs_out_ops_t tmpfs_ops;
|
|---|
| 73 | extern libfs_ops_t tmpfs_libfs_ops;
|
|---|
| 74 |
|
|---|
| 75 | extern bool tmpfs_init(void);
|
|---|
| 76 | extern bool tmpfs_restore(service_id_t);
|
|---|
| 77 |
|
|---|
| 78 | #endif
|
|---|
| 79 |
|
|---|
| 80 | /**
|
|---|
| 81 | * @}
|
|---|
| 82 | */
|
|---|
