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/*
fdisk.h
*/
#include "c.h"
#define DEFAULT_SECTOR_SIZE 512
#define MAX_SECTOR_SIZE 2048
#define SECTOR_SIZE 512 /* still used in BSD code */
#define MAXIMUM_PARTS 60
#define ACTIVE_FLAG 0x80
#define EXTENDED 0x05
#define WIN98_EXTENDED 0x0f
#define LINUX_PARTITION 0x81
#define LINUX_SWAP 0x82
#define LINUX_NATIVE 0x83
#define LINUX_EXTENDED 0x85
#define LINUX_LVM 0x8e
#define LINUX_RAID 0xfd
#define ALIGN_UP 1
#define ALIGN_DOWN 2
#define ALIGN_NEAREST 3
#define LINE_LENGTH 800
#define IS_EXTENDED(i) \
((i) == EXTENDED || (i) == WIN98_EXTENDED || (i) == LINUX_EXTENDED)
#define cround(n) (display_in_cyl_units ? ((n)/units_per_sector)+1 : (n))
#define scround(x) (((x)+units_per_sector-1)/units_per_sector)
/* fdisk debugging flags/options */
#define FDISK_DEBUG_INIT (1 << 1)
#define FDISK_DEBUG_CONTEXT (1 << 2)
#define FDISK_DEBUG_TOPOLOGY (1 << 3)
#define FDISK_DEBUG_GEOMETRY (1 << 4)
#define FDISK_DEBUG_LABEL (1 << 5)
#define FDISK_DEBUG_ALL 0xFFFF
# define ON_DBG(m, x) do { \
if ((FDISK_DEBUG_ ## m) & fdisk_debug_mask) { \
x; \
} \
} while (0)
# define DBG(m, x) do { \
if ((FDISK_DEBUG_ ## m) & fdisk_debug_mask) { \
fprintf(stderr, "%d: fdisk: %8s: ", getpid(), # m); \
x; \
} \
} while (0)
# define DBG_FLUSH do { \
if (fdisk_debug_mask && \
fdisk_debug_mask != FDISK_DEBUG_INIT) \
fflush(stderr); \
} while(0)
static inline void __attribute__ ((__format__ (__printf__, 1, 2)))
dbgprint(const char *mesg, ...)
{
va_list ap;
va_start(ap, mesg);
vfprintf(stderr, mesg, ap);
va_end(ap);
fputc('\n', stderr);
}
extern int fdisk_debug_mask;
extern void fdisk_init_debug(int mask);
struct partition {
unsigned char boot_ind; /* 0x80 - active */
unsigned char head; /* starting head */
unsigned char sector; /* starting sector */
unsigned char cyl; /* starting cylinder */
unsigned char sys_ind; /* What partition type */
unsigned char end_head; /* end head */
unsigned char end_sector; /* end sector */
unsigned char end_cyl; /* end cylinder */
unsigned char start4[4]; /* starting sector counting from 0 */
unsigned char size4[4]; /* nr of sectors in partition */
} __attribute__ ((packed));
enum menutype {
MAIN_MENU,
EXPERT_MENU,
};
enum failure {
ioctl_error,
unable_to_read,
unable_to_seek,
unable_to_write
};
typedef unsigned long long sector_t;
/*
* Legacy CHS based geometry
*/
struct fdisk_geometry {
unsigned int heads;
sector_t sectors;
sector_t cylinders;
};
struct fdisk_context {
int dev_fd; /* device descriptor */
char *dev_path; /* device path */
unsigned char *firstsector; /* buffer with master boot record */
/* topology */
unsigned long io_size; /* I/O size used by fdisk */
unsigned long optimal_io_size; /* optional I/O returned by device */
unsigned long min_io_size; /* minimal I/O size */
unsigned long phy_sector_size; /* physical size */
unsigned long sector_size; /* logical size */
unsigned long alignment_offset;
unsigned long grain; /* alignment unit */
/* geometry */
sector_t total_sectors; /* in logical sectors */
struct fdisk_geometry geom;
/* label operations and description */
const struct fdisk_label *label;
};
/*
* Label specific operations
*/
struct fdisk_label {
const char *name;
/* probe disk label */
int (*probe)(struct fdisk_context *cxt);
/* write in-memory changes to disk */
int (*write)(struct fdisk_context *cxt);
/* verify the partition table */
int (*verify)(struct fdisk_context *cxt);
/* create new disk label */
int (*create)(struct fdisk_context *cxt);
/* new partition */
void (*part_add)(struct fdisk_context *cxt, int partnum, int parttype);
/* delete partition */
void (*part_delete)(struct fdisk_context *cxt, int partnum);
};
/*
* labels
*/
extern const struct fdisk_label aix_label;
extern const struct fdisk_label dos_label;
extern const struct fdisk_label bsd_label;
extern const struct fdisk_label mac_label;
extern const struct fdisk_label sun_label;
extern const struct fdisk_label sgi_label;
extern struct fdisk_context *fdisk_new_context_from_filename(const char *fname, int readonly);
extern int fdisk_dev_has_topology(struct fdisk_context *cxt);
extern int fdisk_dev_has_disklabel(struct fdisk_context *cxt);
extern int fdisk_dev_sectsz_is_default(struct fdisk_context *cxt);
extern void fdisk_free_context(struct fdisk_context *cxt);
extern void fdisk_zeroize_firstsector(struct fdisk_context *cxt);
extern int fdisk_context_force_sector_size(struct fdisk_context *cxt, sector_t s);
extern int fdisk_context_set_user_geometry(struct fdisk_context *cxt,
unsigned int cylinders, unsigned int heads,
unsigned int sectors);
extern int fdisk_delete_partition(struct fdisk_context *cxt, int partnum);
extern int fdisk_add_partition(struct fdisk_context *cxt, int partnum, int parttype);
extern int fdisk_write_disklabel(struct fdisk_context *cxt);
extern int fdisk_verify_disklabel(struct fdisk_context *cxt);
extern int fdisk_create_disklabel(struct fdisk_context *cxt, const char *name);
/* prototypes for fdisk.c */
extern char *line_ptr;
extern int partitions;
extern unsigned int display_in_cyl_units, units_per_sector;
extern void check_consistency(struct fdisk_context *cxt, struct partition *p, int partition);
extern void check_alignment(struct fdisk_context *cxt, sector_t lba, int partition);
extern void check(struct fdisk_context *cxt, int n, unsigned int h, unsigned int s, unsigned int c, unsigned int start);
extern void change_units(struct fdisk_context *cxt);
extern void fatal(struct fdisk_context *cxt, enum failure why);
extern int get_partition(struct fdisk_context *cxt, int warn, int max);
extern void list_types(struct systypes *sys);
extern int read_line (int *asked);
extern char read_char(char *mesg);
extern int read_hex(struct systypes *sys);
extern void reread_partition_table(struct fdisk_context *cxt, int leave);
extern struct partition *get_part_table(int);
extern unsigned int read_int(struct fdisk_context *cxt,
unsigned int low, unsigned int dflt,
unsigned int high, unsigned int base, char *mesg);
extern void print_menu(enum menutype);
extern void print_partition_size(struct fdisk_context *cxt, int num, sector_t start, sector_t stop, int sysid);
extern void fill_bounds(sector_t *first, sector_t *last);
extern char *partition_type(unsigned char type);
extern void update_units(struct fdisk_context *cxt);
extern char read_chars(char *mesg);
extern void set_changed(int);
extern void set_all_unchanged(void);
extern int warn_geometry(struct fdisk_context *cxt);
extern void warn_limits(struct fdisk_context *cxt);
extern void warn_alignment(struct fdisk_context *cxt);
extern unsigned int read_int_with_suffix(struct fdisk_context *cxt,
unsigned int low, unsigned int dflt, unsigned int high,
unsigned int base, char *mesg, int *is_suffix_used);
extern sector_t align_lba(struct fdisk_context *cxt, sector_t lba, int direction);
extern int get_partition_dflt(struct fdisk_context *cxt, int warn, int max, int dflt);
extern void update_sector_offset(struct fdisk_context *cxt);
#define PLURAL 0
#define SINGULAR 1
extern const char * str_units(int);
extern sector_t get_nr_sects(struct partition *p);
/*
* Supported partition table types (labels)
*/
enum fdisk_labeltype {
DOS_LABEL = 1,
SUN_LABEL = 2,
SGI_LABEL = 4,
AIX_LABEL = 8,
OSF_LABEL = 16,
MAC_LABEL = 32,
ANY_LABEL = -1
};
extern enum fdisk_labeltype disklabel;
extern int MBRbuffer_changed;
/* start_sect and nr_sects are stored little endian on all machines */
/* moreover, they are not aligned correctly */
static inline void
store4_little_endian(unsigned char *cp, unsigned int val) {
cp[0] = (val & 0xff);
cp[1] = ((val >> 8) & 0xff);
cp[2] = ((val >> 16) & 0xff);
cp[3] = ((val >> 24) & 0xff);
}
static inline unsigned int read4_little_endian(const unsigned char *cp)
{
return (unsigned int)(cp[0]) + ((unsigned int)(cp[1]) << 8)
+ ((unsigned int)(cp[2]) << 16)
+ ((unsigned int)(cp[3]) << 24);
}
static inline void set_nr_sects(struct partition *p, sector_t nr_sects)
{
store4_little_endian(p->size4, nr_sects);
}
static inline void set_start_sect(struct partition *p, unsigned int start_sect)
{
store4_little_endian(p->start4, start_sect);
}
static inline void seek_sector(struct fdisk_context *cxt, sector_t secno)
{
off_t offset = (off_t) secno * cxt->sector_size;
if (lseek(cxt->dev_fd, offset, SEEK_SET) == (off_t) -1)
fatal(cxt, unable_to_seek);
}
static inline void read_sector(struct fdisk_context *cxt, sector_t secno, unsigned char *buf)
{
seek_sector(cxt, secno);
if (read(cxt->dev_fd, buf, cxt->sector_size) != (ssize_t) cxt->sector_size)
fatal(cxt, unable_to_read);
}
static inline sector_t get_start_sect(struct partition *p)
{
return read4_little_endian(p->start4);
}
static inline int is_cleared_partition(struct partition *p)
{
return !(!p || p->boot_ind || p->head || p->sector || p->cyl ||
p->sys_ind || p->end_head || p->end_sector || p->end_cyl ||
get_start_sect(p) || get_nr_sects(p));
}
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