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#ifndef EXT2_TYPE_H
#define EXT2_TYPE_H
#include <minix/libminixfs.h>
/* On the disk all attributes are stored in little endian format.
* Inode structure was taken from linux/include/linux/ext2_fs.h.
*/
typedef struct {
u16_t i_mode; /* File mode */
u16_t i_uid; /* Low 16 bits of Owner Uid */
u32_t i_size; /* Size in bytes */
u32_t i_atime; /* Access time */
u32_t i_ctime; /* Creation time */
u32_t i_mtime; /* Modification time */
u32_t i_dtime; /* Deletion Time */
u16_t i_gid; /* Low 16 bits of Group Id */
u16_t i_links_count; /* Links count */
u32_t i_blocks; /* Blocks count */
u32_t i_flags; /* File flags */
union {
struct {
u32_t l_i_reserved1;
} linux1;
struct {
u32_t h_i_translator;
} hurd1;
struct {
u32_t m_i_reserved1;
} masix1;
} osd1; /* OS dependent 1 */
u32_t i_block[EXT2_N_BLOCKS];/* Pointers to blocks */
u32_t i_generation; /* File version (for NFS) */
u32_t i_file_acl; /* File ACL */
u32_t i_dir_acl; /* Directory ACL */
u32_t i_faddr; /* Fragment address */
union {
struct {
u8_t l_i_frag; /* Fragment number */
u8_t l_i_fsize; /* Fragment size */
u16_t i_pad1;
u16_t l_i_uid_high; /* these 2 fields */
u16_t l_i_gid_high; /* were reserved2[0] */
u32_t l_i_reserved2;
} linux2;
struct {
u8_t h_i_frag; /* Fragment number */
u8_t h_i_fsize; /* Fragment size */
u16_t h_i_mode_high;
u16_t h_i_uid_high;
u16_t h_i_gid_high;
u32_t h_i_author;
} hurd2;
struct {
u8_t m_i_frag; /* Fragment number */
u8_t m_i_fsize; /* Fragment size */
u16_t m_pad1;
u32_t m_i_reserved2[2];
} masix2;
} osd2; /* OS dependent 2 */
} d_inode;
/* Part of on disk directory (entry description).
* It includes all fields except name (since size is unknown.
* In revision 0 name_len is u16_t (here is structure of rev >= 0.5,
* where name_len was truncated with the upper 8 bit to add file_type).
* MIN_DIR_ENTRY_SIZE depends on this structure.
*/
struct ext2_disk_dir_desc {
u32_t d_ino;
u16_t d_rec_len;
u8_t d_name_len;
u8_t d_file_type;
char d_name[1];
};
/* Current position in block */
#define CUR_DISC_DIR_POS(cur_desc, base) ((char*)cur_desc - (char*)base)
/* Return pointer to the next dentry */
#define NEXT_DISC_DIR_DESC(cur_desc) ((struct ext2_disk_dir_desc*)\
((char*)cur_desc + cur_desc->d_rec_len))
/* Return next dentry's position in block */
#define NEXT_DISC_DIR_POS(cur_desc, base) (cur_desc->d_rec_len +\
CUR_DISC_DIR_POS(cur_desc, base))
/* Structure with options affecting global behavior. */
struct opt {
int use_orlov; /* Bool: Use Orlov allocator */
/* In ext2 there are reserved blocks, which can be used by super user only or
* user specified by resuid/resgid. Right now we can't check what user
* requested operation (VFS limitation), so it's a small warkaround.
*/
int mfsalloc; /* Bool: use mfslike allocator */
int use_reserved_blocks; /* Bool: small workaround */
unsigned int block_with_super;/* Int: where to read super block,
* uses 1k units. */
int use_prealloc; /* Bool: use preallocation */
};
#endif /* EXT2_TYPE_H */
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