| 1 | /*
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| 2 | * Copyright (c) 2009 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 libfs
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| 30 | * @{
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| 31 | */
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| 32 | /**
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| 33 | * @file
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| 34 | */
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| 35 |
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| 36 | #ifndef LIBFS_LIBFS_H_
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| 37 | #define LIBFS_LIBFS_H_
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| 38 |
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| 39 | #include <ipc/vfs.h>
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| 40 | #include <stdint.h>
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| 41 | #include <async.h>
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| 42 | #include <loc.h>
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| 43 |
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| 44 | typedef struct {
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| 45 | int (* mounted)(service_id_t, const char *, fs_index_t *, aoff64_t *,
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| 46 | unsigned *);
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| 47 | int (* unmounted)(service_id_t);
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| 48 | int (* read)(service_id_t, fs_index_t, aoff64_t, size_t *);
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| 49 | int (* write)(service_id_t, fs_index_t, aoff64_t, size_t *,
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| 50 | aoff64_t *);
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| 51 | int (* truncate)(service_id_t, fs_index_t, aoff64_t);
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| 52 | int (* close)(service_id_t, fs_index_t);
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| 53 | int (* destroy)(service_id_t, fs_index_t);
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| 54 | int (* sync)(service_id_t, fs_index_t);
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| 55 | } vfs_out_ops_t;
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| 56 |
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| 57 | typedef struct {
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| 58 | bool mp_active;
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| 59 | async_sess_t *sess;
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| 60 | fs_handle_t fs_handle;
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| 61 | service_id_t service_id;
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| 62 | } mp_data_t;
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| 63 |
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| 64 | typedef struct {
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| 65 | mp_data_t mp_data; /**< Mount point info. */
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| 66 | void *data; /**< Data of the file system implementation. */
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| 67 | } fs_node_t;
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| 68 |
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| 69 | typedef struct {
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| 70 | /*
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| 71 | * The first set of methods are functions that return an integer error
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| 72 | * code. If some additional return value is to be returned, the first
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| 73 | * argument holds the output argument.
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| 74 | */
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| 75 | int (* root_get)(fs_node_t **, service_id_t);
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| 76 | int (* match)(fs_node_t **, fs_node_t *, const char *);
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| 77 | int (* node_get)(fs_node_t **, service_id_t, fs_index_t);
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| 78 | int (* node_open)(fs_node_t *);
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| 79 | int (* node_put)(fs_node_t *);
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| 80 | int (* create)(fs_node_t **, service_id_t, int);
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| 81 | int (* destroy)(fs_node_t *);
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| 82 | int (* link)(fs_node_t *, fs_node_t *, const char *);
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| 83 | int (* unlink)(fs_node_t *, fs_node_t *, const char *);
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| 84 | int (* has_children)(bool *, fs_node_t *);
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| 85 | /*
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| 86 | * The second set of methods are usually mere getters that do not
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| 87 | * return an integer error code.
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| 88 | */
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| 89 | fs_index_t (* index_get)(fs_node_t *);
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| 90 | aoff64_t (* size_get)(fs_node_t *);
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| 91 | unsigned int (* lnkcnt_get)(fs_node_t *);
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| 92 | bool (* is_directory)(fs_node_t *);
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| 93 | bool (* is_file)(fs_node_t *);
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| 94 | service_id_t (* service_get)(fs_node_t *);
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| 95 | uint32_t (* size_block)(service_id_t);
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| 96 | uint64_t (* total_block)(service_id_t);
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| 97 | uint64_t (* free_block)(service_id_t);
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| 98 | } libfs_ops_t;
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| 99 |
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| 100 | typedef struct {
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| 101 | int fs_handle; /**< File system handle. */
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| 102 | uint8_t *plb_ro; /**< Read-only PLB view. */
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| 103 | } fs_reg_t;
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| 104 |
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| 105 | extern int fs_register(async_sess_t *, vfs_info_t *, vfs_out_ops_t *,
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| 106 | libfs_ops_t *);
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| 107 |
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| 108 | extern void fs_node_initialize(fs_node_t *);
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| 109 |
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| 110 | extern int fs_instance_create(service_id_t, void *);
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| 111 | extern int fs_instance_get(service_id_t, void **);
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| 112 | extern int fs_instance_destroy(service_id_t);
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| 113 |
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| 114 | #endif
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| 115 |
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| 116 | /** @}
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| 117 | */
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