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Diffstat (limited to 'usr/src/lib/libfdisk/i386/libfdisk.h')
| -rw-r--r-- | usr/src/lib/libfdisk/i386/libfdisk.h | 304 |
1 files changed, 304 insertions, 0 deletions
diff --git a/usr/src/lib/libfdisk/i386/libfdisk.h b/usr/src/lib/libfdisk/i386/libfdisk.h new file mode 100644 index 0000000000..46e16f4bf1 --- /dev/null +++ b/usr/src/lib/libfdisk/i386/libfdisk.h @@ -0,0 +1,304 @@ +/* + * CDDL HEADER START + * + * The contents of this file are subject to the terms of the + * Common Development and Distribution License (the "License"). + * You may not use this file except in compliance with the License. + * + * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE + * or http://www.opensolaris.org/os/licensing. + * See the License for the specific language governing permissions + * and limitations under the License. + * + * When distributing Covered Code, include this CDDL HEADER in each + * file and include the License file at usr/src/OPENSOLARIS.LICENSE. + * If applicable, add the following below this CDDL HEADER, with the + * fields enclosed by brackets "[]" replaced with your own identifying + * information: Portions Copyright [yyyy] [name of copyright owner] + * + * CDDL HEADER END + */ +/* + * Copyright 2009 Sun Microsystems, Inc. All rights reserved. + * Use is subject to license terms. + */ + + +#ifndef _LIBFDISK_H_ +#define _LIBFDISK_H_ + +#include <limits.h> +#include <sys/dktp/fdisk.h> + +#ifdef __cplusplus +extern "C" { +#endif + +#define MAX_LOGDRIVE_OFFSET 63 + +#define FDISK_ERRNO 200 +#define FDISK_ETOOLONG (FDISK_ERRNO + 0) +#define FDISK_EOOBOUND (FDISK_ERRNO + 1) +#define FDISK_EZERO (FDISK_ERRNO + 2) +#define FDISK_EOVERLAP (FDISK_ERRNO + 3) +#define FDISK_ENOVGEOM (FDISK_ERRNO + 4) +#define FDISK_ENOPGEOM (FDISK_ERRNO + 5) +#define FDISK_ENOLGEOM (FDISK_ERRNO + 6) +#define FDISK_ENOLOGDRIVE (FDISK_ERRNO + 7) +#define FDISK_EBADLOGDRIVE (FDISK_ERRNO + 8) +#define FDISK_ENOEXTPART (FDISK_ERRNO + 9) +#define FDISK_EBADMAGIC (FDISK_ERRNO + 10) +#define FDISK_EMOUNTED (FDISK_ERRNO + 11) + +#define FDISK_SUCCESS 0 + +#define FDISK_READ_DISK 0x00000001 + +#define LINUX_SWAP_MAGIC_LENGTH 10 +enum { + PHYSGEOM = 0, + VIRTGEOM, + NCYL, + NHEADS, + NSECTPT, + SSIZE, + ACYL +}; + +enum { + FDISK_MINOR_WRITE = 1, + FDISK_MAJOR_WRITE +}; + +#define FDISK_SECTS_PER_CYL(epp) \ + (epp->disk_geom.phys_heads * epp->disk_geom.phys_sec) +#define FDISK_SECT_TO_CYL(epp, x) ((x) / (FDISK_SECTS_PER_CYL(epp))) +#define FDISK_CYL_TO_SECT(epp, x) ((x) * (FDISK_SECTS_PER_CYL(epp))) +#define FDISK_ABS_CYL_NUM(epp, x) (FDISK_SECT_TO_CYL(x) +\ + epp->ext_beg_cyl) + +#define FDISK_CYL_BNDRY_ALIGN(epp, x) (((x) % (FDISK_SECTS_PER_CYL(epp))) ? \ + (((x)/(FDISK_SECTS_PER_CYL(epp))) + 1) :\ + ((x)/(FDISK_SECTS_PER_CYL(epp)))) + +/* + * Extended partition structure : + * +--------------+ + * |+--+ | + * || |----------+---> structure at the beginning of the extended partition + * ||--| | ( Lets call it the EBR - Extended Boot Record ) + * || | +---+---> + * |+--+ | | Logical drive within the extended partition + * |+---------+--+| ( We will plainly call this a logical drive ) + * || || + * || || + * || || + * |+------------+| + * +--------------+ + * + * + * EBR is effectively "struct ipart parts[2]". + * The picture below shows what the EBR contains. The EBR has + * two important pieces of information. The first is the offset and the size + * of the logical drive in this extended partition. The second is the offset + * and size of the next extended partition. The offsets are relative to + * beginning of the first extended partition. These extended partitions are + * arranged like a linked list. + * Note that (currently) only one extended partition can exist in the MBR. + * The system ID of a logical drive within the extended partition cannot be + * that of an extended partition. + * + * +------+ + * | | + * +--------------+ | +-v------------+ + * |+--+ | | |+--+ | + * || |---+ | | || | | + * ||--| | | | ||--| | + * || |---|------+-+ || | | + * |+--+ | | |+--+ | + * |+------v-----+| |+------------+| + * || || || || + * || || || || + * || || || || + * |+------------+| |+------------+| + * +--------------+ +--------------+ + * + */ + +/* + * Main structure used to record changes to the partitions made. + * Changes are not written to disk everytime, but maintained in this structure. + * This information is used when the user chooses to commit the changes. + * A linked list of this structure represents the ondisk partitions. + */ +typedef struct logical_drive { + + /* structure holding the EBR data */ + struct ipart parts[2]; + + /* + * Absolute beginning sector of the extended partition, and hence an + * indicator of where the EBR for this logical drive would go on disk. + * NOTE : In case the first logical drive in this extended partition is + * out of (disk) order, this indicates the beginning of the logical + * drive. The EBR will anyway be at the first sector of the extended + * partition, for the first logical drive. + */ + uint32_t abs_secnum; + + /* + * Offset of the logical drive from the beginning of its extended + * partition + */ + uint32_t logdrive_offset; + + /* Size of the logical drive in sectors */ + uint32_t numsect; + + /* Beginning and ending cylinders of the extended partition */ + uint32_t begcyl, endcyl; + + /* + * Flag to indicate if this record is to be sync'ed to disk. + * It takes two values : FDISK_MAJOR_WRITE and FDISK_MINOR_WRITE + * If it is a minor write, there is no need to update the information + * in the kernel structures. Example of a minor write is correction of + * a corrupt boot signature. + */ + int modified; + + /* + * This pointer points to the next extended partition in the order + * found on disk. + */ + struct logical_drive *next; + + /* + * This pointer points to the next extended partition in a sorted list + * sorted in the ascending order of their beginning cylinders. + */ + struct logical_drive *sorted_next; + +} logical_drive_t; + +typedef struct fdisk_disk_geom { + ushort_t phys_cyl; + ushort_t phys_sec; + ushort_t phys_heads; + ushort_t alt_cyl; + ushort_t virt_cyl; + ushort_t virt_sec; + ushort_t virt_heads; + ushort_t sectsize; +} fdisk_disk_geom_t; + +typedef struct ext_part +{ + /* Structure holding geometry information about the device */ + fdisk_disk_geom_t disk_geom; + + struct ipart *mtable; + + char device_name[PATH_MAX]; + + int dev_fd; + + int op_flag; + + /* + * Head of the in memory structure (singly linked list) of extended + * partition information. + */ + logical_drive_t *ld_head; + logical_drive_t *sorted_ld_head; + + /* Beginning cylinder of the extended partition */ + uint32_t ext_beg_cyl; + + /* Ending cylinder of the extended partition */ + uint32_t ext_end_cyl; + + /* Beginning sector of the extended partition */ + uint32_t ext_beg_sec; + + /* Ending sector of the extended partition */ + uint32_t ext_end_sec; + + /* Count of the number of logical drives in the extended partition */ + int logical_drive_count; + + /* + * Flag to keep track of the update to be made to the Extended Boot + * Record (EBR) when all logical drives are deleted. The EBR is filled + * with zeroes in such a case. + */ + int first_ebr_is_null; + + /* + * Flag to indicate corrupt logical drives. Can happen when a partition + * manager creates an extended partition and does not null the first EBR + * or when important ondisk structures are overwritten by a bad program + */ + int corrupt_logical_drives; + + /* + * The boot block signature 0xAA55 might not be found on some of the + * EBRs. ( Even though the rest of the data might be good ) + * The following array is used to store the list of such logical drive + * numbers. + */ + uchar_t invalid_bb_sig[MAX_EXT_PARTS]; + + /* + * Can add a "next" pointer here in case support for multiple + * extended partitions becomes the standard someday. + * + * struct ext_part *next; + */ +} ext_part_t; + +#define fdisk_get_logical_drive_count(epp) ((epp)->logical_drive_count) +#define fdisk_corrupt_logical_drives(epp) ((epp)->corrupt_logical_drives) +#define fdisk_get_ext_beg_cyl(epp) ((epp)->ext_beg_cyl) +#define fdisk_get_ext_end_cyl(epp) ((epp)->ext_end_cyl) +#define fdisk_get_ext_beg_sec(epp) ((epp)->ext_beg_sec) +#define fdisk_get_ext_end_sec(epp) ((epp)->ext_end_sec) +#define fdisk_get_ld_head(epp) ((epp)->ld_head) +#define fdisk_is_solaris_part(id) (((id) == SUNIXOS) || ((id) == SUNIXOS2)) +#define fdisk_is_dos_extended(id) (((id) == EXTDOS) || ((id) == FDISK_EXTLBA)) + +extern int fdisk_is_linux_swap(ext_part_t *epp, uint32_t part_start, + off_t *lsm_offset); +extern int libfdisk_init(ext_part_t **epp, char *devstr, struct ipart *parttab, + int opflag); +extern int libfdisk_reset(ext_part_t *epp); +extern void libfdisk_fini(ext_part_t **epp); +extern int fdisk_ext_find_first_free_sec(ext_part_t *epp, + uint32_t *first_free_sec); +extern uint32_t fdisk_ext_find_last_free_sec(ext_part_t *epp, uint32_t begsec); +extern int fdisk_ext_part_exists(ext_part_t *epp); +extern int fdisk_validate_logical_drive(ext_part_t *epp, uint32_t begsec, + uint32_t offset, uint32_t numsec); +extern int fdisk_ext_validate_part_start(ext_part_t *epp, uint32_t begcyl, + uint32_t *begsec); +extern int fdisk_get_solaris_part(ext_part_t *epp, int *pnum, uint32_t *begsec, + uint32_t *numsec); +extern int fdisk_get_part_info(ext_part_t *epp, int pnum, uchar_t *sysid, + uint32_t *begsec, uint32_t *numsec); +extern int fdisk_commit_ext_part(ext_part_t *epp); +extern void fdisk_change_logical_drive_id(ext_part_t *epp, int pno, + uchar_t partid); +extern void fdisk_add_logical_drive(ext_part_t *epp, uint32_t begsec, + uint32_t endsec, uchar_t partid); +extern void fdisk_delete_logical_drive(ext_part_t *epp, int pno); +extern int fdisk_init_ext_part(ext_part_t *epp, uint32_t rsect, uint32_t nsect); +extern int fdisk_delete_ext_part(ext_part_t *epp); +extern int fdisk_get_disk_geom(ext_part_t *epp, int type, int what); +extern int fdisk_invalid_bb_sig(ext_part_t *epp, uchar_t **bbsig_arr); +extern int fdisk_mounted_logical_drives(ext_part_t *epp); + +#ifdef __cplusplus +} +#endif + +#endif /* _LIBFDISK_H_ */ |