| 1 | /*
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| 2 | * Copyright (c) 2011 Frantisek Princ
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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 libext4
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| 30 | * @{
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| 31 | */
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| 32 |
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| 33 | /**
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| 34 | * @file libext4_inode.c
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| 35 | * @brief Ext4 inode operations.
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| 36 | */
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| 37 |
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| 38 | #include <byteorder.h>
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| 39 | #include "libext4.h"
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| 40 |
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| 41 | uint32_t ext4_inode_get_mode(ext4_superblock_t *sb, ext4_inode_t *inode)
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| 42 | {
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| 43 | if (ext4_superblock_get_creator_os(sb) == EXT4_SUPERBLOCK_OS_HURD) {
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| 44 | return ((uint32_t)uint16_t_le2host(inode->osd2.hurd2.mode_high)) << 16 |
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| 45 | ((uint32_t)uint16_t_le2host(inode->mode));
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| 46 | }
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| 47 | return uint16_t_le2host(inode->mode);
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| 48 | }
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| 49 |
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| 50 | bool ext4_inode_is_type(ext4_superblock_t *sb, ext4_inode_t *inode, uint32_t type)
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| 51 | {
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| 52 | uint32_t mode = ext4_inode_get_mode(sb, inode);
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| 53 | return (mode & EXT4_INODE_MODE_TYPE_MASK) == type;
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| 54 | }
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| 55 |
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| 56 | /*
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| 57 | uint32_t ext4_inode_get_uid(ext4_inode_t *inode)
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| 58 | */
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| 59 |
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| 60 | uint64_t ext4_inode_get_size(ext4_superblock_t *sb, ext4_inode_t *inode)
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| 61 | {
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| 62 | uint32_t major_rev = ext4_superblock_get_rev_level(sb);
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| 63 |
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| 64 | if (major_rev > 0 && ext4_inode_is_type(sb, inode, EXT4_INODE_MODE_FILE)) {
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| 65 | return ((uint64_t)uint32_t_le2host(inode->size_hi)) << 32 |
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| 66 | ((uint64_t)uint32_t_le2host(inode->size_lo));
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| 67 | }
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| 68 | return uint32_t_le2host(inode->size_lo);
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| 69 | }
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| 70 |
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| 71 | /*
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| 72 | extern uint32_t ext4_inode_get_access_time(ext4_inode_t *);
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| 73 | extern uint32_t ext4_inode_get_change_inode_time(ext4_inode_t *);
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| 74 | extern uint32_t ext4_inode_get_modification_time(ext4_inode_t *);
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| 75 | extern uint32_t ext4_inode_get_deletion_time(ext4_inode_t *);
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| 76 | extern uint32_t ext4_inode_get_gid(ext4_inode_t *);
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| 77 | */
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| 78 |
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| 79 | uint16_t ext4_inode_get_links_count(ext4_inode_t *inode)
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| 80 | {
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| 81 | return uint16_t_le2host(inode->links_count);
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| 82 | }
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| 83 |
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| 84 | /*
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| 85 | extern uint64_t ext4_inode_get_blocks_count(ext4_inode_t *);
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| 86 | */
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| 87 |
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| 88 | uint32_t ext4_inode_get_flags(ext4_inode_t *inode) {
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| 89 | return uint32_t_le2host(inode->flags);
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| 90 | }
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| 91 |
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| 92 | uint32_t ext4_inode_get_direct_block(ext4_inode_t *inode, uint8_t idx)
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| 93 | {
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| 94 | assert(idx < EXT4_INODE_DIRECT_BLOCK_COUNT);
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| 95 | return uint32_t_le2host(inode->blocks[idx]);
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| 96 | }
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| 97 |
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| 98 | uint32_t ext4_inode_get_indirect_block(ext4_inode_t *inode, uint8_t idx)
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| 99 | {
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| 100 | assert(idx < EXT4_INODE_INDIRECT_BLOCK_COUNT);
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| 101 | return uint32_t_le2host(inode->blocks[idx + EXT4_INODE_INDIRECT_BLOCK]);
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| 102 | }
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| 103 |
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| 104 |
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| 105 | // Flags checker
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| 106 | bool ext4_inode_has_flag(ext4_inode_t *inode, uint32_t flag) {
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| 107 | if (ext4_inode_get_flags(inode) & flag) {
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| 108 | return true;
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| 109 | }
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| 110 | return false;
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| 111 | }
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| 112 |
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| 113 | /**
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| 114 | * @}
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| 115 | */
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