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Adds support for qnx6fs readonly support to the linux kernel. * Mount option The option mmi_fs can be used to mount Harman Becker/Audi MMI 3G HDD qnx6fs filesystems. * Documentation A high level filesystem stucture description can be found in the Documentation/filesystems directory. (qnx6.txt) * Additional features - Active (stable) superblock selection - Superblock checksum check (enforced) - Supports mount of qnx6 filesystems with to host different endianess - Automatic endianess detection - Longfilename support (with non-enfocing crc check) - All blocksizes (512, 1024, 2048 and 4096 supported) Signed-off-by: Kai Bankett <chaosman@ontika.net> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
135 lines
3.2 KiB
C
135 lines
3.2 KiB
C
/*
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* Name : qnx6_fs.h
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* Author : Kai Bankett
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* Function : qnx6 global filesystem definitions
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* History : 17-01-2012 created
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*/
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#ifndef _LINUX_QNX6_FS_H
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#define _LINUX_QNX6_FS_H
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#include <linux/types.h>
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#include <linux/magic.h>
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#define QNX6_ROOT_INO 1
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/* for di_status */
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#define QNX6_FILE_DIRECTORY 0x01
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#define QNX6_FILE_DELETED 0x02
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#define QNX6_FILE_NORMAL 0x03
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#define QNX6_SUPERBLOCK_SIZE 0x200 /* superblock always is 512 bytes */
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#define QNX6_SUPERBLOCK_AREA 0x1000 /* area reserved for superblock */
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#define QNX6_BOOTBLOCK_SIZE 0x2000 /* heading bootblock area */
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#define QNX6_DIR_ENTRY_SIZE 0x20 /* dir entry size of 32 bytes */
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#define QNX6_INODE_SIZE 0x80 /* each inode is 128 bytes */
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#define QNX6_INODE_SIZE_BITS 7 /* inode entry size shift */
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#define QNX6_NO_DIRECT_POINTERS 16 /* 16 blockptrs in sbl/inode */
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#define QNX6_PTR_MAX_LEVELS 5 /* maximum indirect levels */
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/* for filenames */
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#define QNX6_SHORT_NAME_MAX 27
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#define QNX6_LONG_NAME_MAX 510
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/* list of mount options */
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#define QNX6_MOUNT_MMI_FS 0x010000 /* mount as Audi MMI 3G fs */
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/*
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* This is the original qnx6 inode layout on disk.
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* Each inode is 128 byte long.
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*/
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struct qnx6_inode_entry {
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__fs64 di_size;
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__fs32 di_uid;
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__fs32 di_gid;
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__fs32 di_ftime;
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__fs32 di_mtime;
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__fs32 di_atime;
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__fs32 di_ctime;
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__fs16 di_mode;
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__fs16 di_ext_mode;
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__fs32 di_block_ptr[QNX6_NO_DIRECT_POINTERS];
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__u8 di_filelevels;
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__u8 di_status;
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__u8 di_unknown2[2];
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__fs32 di_zero2[6];
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};
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/*
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* Each directory entry is maximum 32 bytes long.
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* If more characters or special characters required it is stored
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* in the longfilenames structure.
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*/
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struct qnx6_dir_entry {
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__fs32 de_inode;
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__u8 de_size;
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char de_fname[QNX6_SHORT_NAME_MAX];
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};
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/*
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* Longfilename direntries have a different structure
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*/
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struct qnx6_long_dir_entry {
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__fs32 de_inode;
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__u8 de_size;
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__u8 de_unknown[3];
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__fs32 de_long_inode;
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__fs32 de_checksum;
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};
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struct qnx6_long_filename {
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__fs16 lf_size;
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__u8 lf_fname[QNX6_LONG_NAME_MAX];
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};
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struct qnx6_root_node {
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__fs64 size;
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__fs32 ptr[QNX6_NO_DIRECT_POINTERS];
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__u8 levels;
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__u8 mode;
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__u8 spare[6];
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};
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struct qnx6_super_block {
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__fs32 sb_magic;
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__fs32 sb_checksum;
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__fs64 sb_serial;
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__fs32 sb_ctime; /* time the fs was created */
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__fs32 sb_atime; /* last access time */
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__fs32 sb_flags;
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__fs16 sb_version1; /* filesystem version information */
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__fs16 sb_version2; /* filesystem version information */
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__u8 sb_volumeid[16];
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__fs32 sb_blocksize;
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__fs32 sb_num_inodes;
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__fs32 sb_free_inodes;
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__fs32 sb_num_blocks;
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__fs32 sb_free_blocks;
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__fs32 sb_allocgroup;
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struct qnx6_root_node Inode;
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struct qnx6_root_node Bitmap;
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struct qnx6_root_node Longfile;
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struct qnx6_root_node Unknown;
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};
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/* Audi MMI 3G superblock layout is different to plain qnx6 */
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struct qnx6_mmi_super_block {
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__fs32 sb_magic;
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__fs32 sb_checksum;
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__fs64 sb_serial;
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__u8 sb_spare0[12];
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__u8 sb_id[12];
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__fs32 sb_blocksize;
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__fs32 sb_num_inodes;
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__fs32 sb_free_inodes;
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__fs32 sb_num_blocks;
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__fs32 sb_free_blocks;
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__u8 sb_spare1[4];
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struct qnx6_root_node Inode;
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struct qnx6_root_node Bitmap;
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struct qnx6_root_node Longfile;
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struct qnx6_root_node Unknown;
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};
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#endif
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