/* * 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, uint64_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_ */
