/* * Copyright (c) 2011 Frantisek Princ * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * * - Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * - Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * - The name of the author may not be used to endorse or promote products * derived from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ /** @addtogroup libext4 * @{ */ #ifndef LIBEXT4_LIBEXT4_INODE_H_ #define LIBEXT4_LIBEXT4_INODE_H_ #include #include #include "libext4_extent.h" #include "libext4_superblock.h" #define EXT4_INODE_BLOCK_SIZE 512 #define EXT4_INODE_DIRECT_BLOCK_COUNT 12 #define EXT4_INODE_INDIRECT_BLOCK EXT4_INODE_DIRECT_BLOCK_COUNT #define EXT4_INODE_DOUBLE_INDIRECT_BLOCK (EXT4_INODE_INDIRECT_BLOCK + 1) #define EXT4_INODE_TRIPPLE_INDIRECT_BLOCK (EXT4_INODE_DOUBLE_INDIRECT_BLOCK + 1) #define EXT4_INODE_BLOCKS (EXT4_INODE_TRIPPLE_INDIRECT_BLOCK + 1) #define EXT4_INODE_INDIRECT_BLOCK_COUNT (EXT4_INODE_BLOCKS - EXT4_INODE_DIRECT_BLOCK_COUNT) /* * Structure of an inode on the disk */ typedef struct ext4_inode { uint16_t mode; // File mode uint16_t uid; // Low 16 bits of owner uid uint32_t size_lo; // Size in bytes uint32_t access_time; // Access time uint32_t change_inode_time; // Inode change time uint32_t modification_time; // Modification time uint32_t deletion_time; // Deletion time uint16_t gid; // Low 16 bits of group id uint16_t links_count; // Links count uint32_t blocks_count_lo; // Blocks count uint32_t flags; // File flags uint32_t unused_osd1; // OS dependent - not used in HelenOS uint32_t blocks[EXT4_INODE_BLOCKS]; // Pointers to blocks uint32_t generation; // File version (for NFS) uint32_t file_acl_lo; // File ACL uint32_t size_hi; uint32_t obso_faddr; // Obsoleted fragment address union { struct { uint16_t blocks_high; /* were l_i_reserved1 */ uint16_t file_acl_high; uint16_t uid_high; /* these 2 fields */ uint16_t gid_high; /* were reserved2[0] */ uint32_t reserved2; } linux2; struct { uint16_t reserved1; /* Obsoleted fragment number/size which are removed in ext4 */ uint16_t mode_high; uint16_t uid_high; uint16_t gid_high; uint32_t author; } hurd2; } __attribute__ ((packed)) osd2; uint16_t extra_isize; uint16_t pad1; uint32_t ctime_extra; // Extra change time (nsec << 2 | epoch) uint32_t mtime_extra; // Extra Modification time (nsec << 2 | epoch) uint32_t atime_extra; // Extra Access time (nsec << 2 | epoch) uint32_t crtime; // File creation time uint32_t crtime_extra; // Extra file creation time (nsec << 2 | epoch) uint32_t version_hi; // High 32 bits for 64-bit version } __attribute__ ((packed)) ext4_inode_t; #define EXT4_INODE_MODE_FIFO 0x1000 #define EXT4_INODE_MODE_CHARDEV 0x2000 #define EXT4_INODE_MODE_DIRECTORY 0x4000 #define EXT4_INODE_MODE_BLOCKDEV 0x6000 #define EXT4_INODE_MODE_FILE 0x8000 #define EXT4_INODE_MODE_SOFTLINK 0xA000 #define EXT4_INODE_MODE_SOCKET 0xC000 #define EXT4_INODE_MODE_TYPE_MASK 0xF000 /* * Inode flags */ #define EXT4_INODE_FLAG_SECRM 0x00000001 // Secure deletion #define EXT4_INODE_FLAG_UNRM 0x00000002 // Undelete #define EXT4_INODE_FLAG_COMPR 0x00000004 // Compress file #define EXT4_INODE_FLAG_SYNC 0x00000008 // Synchronous updates #define EXT4_INODE_FLAG_IMMUTABLE 0x00000010 // Immutable file #define EXT4_INODE_FLAG_APPEND 0x00000020 // writes to file may only append #define EXT4_INODE_FLAG_NODUMP 0x00000040 // do not dump file #define EXT4_INODE_FLAG_NOATIME 0x00000080 // do not update atime /* Compression flags */ #define EXT4_INODE_FLAG_DIRTY 0x00000100 #define EXT4_INODE_FLAG_COMPRBLK 0x00000200 // One or more compressed clusters #define EXT4_INODE_FLAG_NOCOMPR 0x00000400 // Don't compress #define EXT4_INODE_FLAG_ECOMPR 0x00000800 // Compression error /* End compression flags --- maybe not all used */ #define EXT4_INODE_FLAG_INDEX 0x00001000 // hash-indexed directory #define EXT4_INODE_FLAG_IMAGIC 0x00002000 // AFS directory */ #define EXT4_INODE_FLAG_JOURNAL_DATA 0x00004000 // File data should be journaled #define EXT4_INODE_FLAG_NOTAIL 0x00008000 // File tail should not be merged #define EXT4_INODE_FLAG_DIRSYNC 0x00010000 // Dirsync behaviour (directories only) #define EXT4_INODE_FLAG_TOPDIR 0x00020000 // Top of directory hierarchies #define EXT4_INODE_FLAG_HUGE_FILE 0x00040000 // Set to each huge file #define EXT4_INODE_FLAG_EXTENTS 0x00080000 // Inode uses extents #define EXT4_INODE_FLAG_EA_INODE 0x00200000 // Inode used for large EA #define EXT4_INODE_FLAG_EOFBLOCKS 0x00400000 // Blocks allocated beyond EOF #define EXT4_INODE_FLAG_RESERVED 0x80000000 // reserved for ext4 lib #define EXT4_INODE_ROOT_INDEX 2 typedef struct ext4_inode_ref { block_t *block; // Reference to a block containing this inode ext4_inode_t *inode; uint32_t index; // Index number of this inode bool dirty; } ext4_inode_ref_t; extern uint32_t ext4_inode_get_mode(ext4_superblock_t *, ext4_inode_t *); extern void ext4_inode_set_mode(ext4_superblock_t *, ext4_inode_t *, uint32_t); extern uint32_t ext4_inode_get_uid(ext4_inode_t *); extern void ext4_inode_set_uid(ext4_inode_t *, uint32_t); extern uint64_t ext4_inode_get_size(ext4_superblock_t *, ext4_inode_t *); extern void ext4_inode_set_size(ext4_inode_t *, uint64_t); extern uint32_t ext4_inode_get_access_time(ext4_inode_t *); extern void ext4_inode_set_access_time(ext4_inode_t *, uint32_t); extern uint32_t ext4_inode_get_change_inode_time(ext4_inode_t *); extern void ext4_inode_set_change_inode_time(ext4_inode_t *, uint32_t); extern uint32_t ext4_inode_get_modification_time(ext4_inode_t *); extern void ext4_inode_set_modification_time(ext4_inode_t *, uint32_t); extern uint32_t ext4_inode_get_deletion_time(ext4_inode_t *); extern void ext4_inode_set_deletion_time(ext4_inode_t *, uint32_t); extern uint32_t ext4_inode_get_gid(ext4_inode_t *); extern void ext4_inode_set_gid(ext4_inode_t *, uint32_t); extern uint16_t ext4_inode_get_links_count(ext4_inode_t *); extern void ext4_inode_set_links_count(ext4_inode_t *, uint16_t); extern uint64_t ext4_inode_get_blocks_count(ext4_superblock_t *, ext4_inode_t *); extern int ext4_inode_set_blocks_count(ext4_superblock_t *, ext4_inode_t *, uint64_t); extern uint32_t ext4_inode_get_flags(ext4_inode_t *); extern void ext4_inode_set_flags(ext4_inode_t *, uint32_t); extern uint32_t ext4_inode_get_generation(ext4_inode_t *); extern void ext4_inode_set_generation(ext4_inode_t *, uint32_t); extern uint64_t ext4_get_inode_file_acl(ext4_inode_t *, ext4_superblock_t *); extern void ext4_set_inode_file_acl(ext4_inode_t *, ext4_superblock_t *, uint64_t); /* uint16_t extra_isize; uint32_t ctime_extra; // Extra change time (nsec << 2 | epoch) uint32_t mtime_extra; // Extra Modification time (nsec << 2 | epoch) uint32_t atime_extra; // Extra Access time (nsec << 2 | epoch) uint32_t crtime; // File creation time uint32_t crtime_extra; // Extra file creation time (nsec << 2 | epoch) uint32_t version_hi; // High 32 bits for 64-bit version */ /******************************************/ extern uint32_t ext4_inode_get_direct_block(ext4_inode_t *, uint32_t); extern void ext4_inode_set_direct_block(ext4_inode_t *, uint32_t, uint32_t); extern uint32_t ext4_inode_get_indirect_block(ext4_inode_t *, uint32_t); extern void ext4_inode_set_indirect_block(ext4_inode_t *, uint32_t, uint32_t); extern uint32_t ext4_inode_get_extent_block(ext4_inode_t *, uint64_t, service_id_t); extern ext4_extent_header_t * ext4_inode_get_extent_header(ext4_inode_t *); extern bool ext4_inode_is_type(ext4_superblock_t *, ext4_inode_t *, uint32_t); extern bool ext4_inode_has_flag(ext4_inode_t *, uint32_t); extern void ext4_inode_clear_flag(ext4_inode_t *, uint32_t); extern void ext4_inode_set_flag(ext4_inode_t *, uint32_t); extern bool ext4_inode_can_truncate(ext4_superblock_t *, ext4_inode_t *); #endif /** * @} */