#ifndef _LINUX_GENHD_H #define _LINUX_GENHD_H /* * genhd.h Copyright (C) 1992 Drew Eckhardt * Generic hard disk header file by * Drew Eckhardt * * */ #include #include #include enum { /* These three have identical behaviour; use the second one if DOS fdisk gets confused about extended/logical partitions starting past cylinder 1023. */ DOS_EXTENDED_PARTITION = 5, LINUX_EXTENDED_PARTITION = 0x85, WIN98_EXTENDED_PARTITION = 0x0f, LINUX_SWAP_PARTITION = 0x82, LINUX_RAID_PARTITION = 0xfd, /* autodetect RAID partition */ SOLARIS_X86_PARTITION = LINUX_SWAP_PARTITION, DM6_PARTITION = 0x54, /* has DDO: use xlated geom & offset */ EZD_PARTITION = 0x55, /* EZ-DRIVE */ DM6_AUX1PARTITION = 0x51, /* no DDO: use xlated geom */ DM6_AUX3PARTITION = 0x53, /* no DDO: use xlated geom */ FREEBSD_PARTITION = 0xa5, /* FreeBSD Partition ID */ OPENBSD_PARTITION = 0xa6, /* OpenBSD Partition ID */ NETBSD_PARTITION = 0xa9, /* NetBSD Partition ID */ BSDI_PARTITION = 0xb7, /* BSDI Partition ID */ /* Ours is not to wonder why.. */ BSD_PARTITION = FREEBSD_PARTITION, MINIX_PARTITION = 0x81, /* Minix Partition ID */ PLAN9_PARTITION = 0x39, /* Plan 9 Partition ID */ UNIXWARE_PARTITION = 0x63, /* Partition ID, same as */ /* GNU_HURD and SCO Unix */ }; 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 int start_sect; /* starting sector counting from 0 */ unsigned int nr_sects; /* nr of sectors in partition */ } __attribute__((packed)); #ifdef __KERNEL__ # include struct hd_struct { unsigned long start_sect; unsigned long nr_sects; devfs_handle_t de; /* primary (master) devfs entry */ #ifdef CONFIG_DEVFS_FS int number; #endif /* CONFIG_DEVFS_FS */ #ifdef CONFIG_BLK_STATS /* Performance stats: */ unsigned int ios_in_flight; unsigned int io_ticks; unsigned int last_idle_time; unsigned int last_queue_change; unsigned int aveq; unsigned int rd_ios; unsigned int rd_merges; unsigned int rd_ticks; unsigned int rd_sectors; unsigned int wr_ios; unsigned int wr_merges; unsigned int wr_ticks; unsigned int wr_sectors; #endif /* CONFIG_BLK_STATS */ }; #define GENHD_FL_REMOVABLE 1 struct gendisk { int major; /* major number of driver */ const char *major_name; /* name of major driver */ int minor_shift; /* number of times minor is shifted to get real minor */ int max_p; /* maximum partitions per device */ struct hd_struct *part; /* [indexed by minor] */ int *sizes; /* [idem], device size in blocks */ int nr_real; /* number of real devices */ void *real_devices; /* internal use */ struct gendisk *next; struct block_device_operations *fops; devfs_handle_t *de_arr; /* one per physical disc */ char *flags; /* one per physical disc */ }; /* drivers/block/genhd.c */ extern struct gendisk *gendisk_head; extern void add_gendisk(struct gendisk *gp); extern void del_gendisk(struct gendisk *gp); extern struct gendisk *get_gendisk(kdev_t dev); extern int walk_gendisk(int (*walk)(struct gendisk *, void *), void *); #endif /* __KERNEL__ */ #ifdef CONFIG_SOLARIS_X86_PARTITION #define SOLARIS_X86_NUMSLICE 8 #define SOLARIS_X86_VTOC_SANE (0x600DDEEEUL) struct solaris_x86_slice { ushort s_tag; /* ID tag of partition */ ushort s_flag; /* permission flags */ unsigned int s_start; /* start sector no of partition */ unsigned int s_size; /* # of blocks in partition */ }; struct solaris_x86_vtoc { unsigned int v_bootinfo[3]; /* info needed by mboot (unsupported) */ unsigned int v_sanity; /* to verify vtoc sanity */ unsigned int v_version; /* layout version */ char v_volume[8]; /* volume name */ ushort v_sectorsz; /* sector size in bytes */ ushort v_nparts; /* number of partitions */ unsigned int v_reserved[10]; /* free space */ struct solaris_x86_slice v_slice[SOLARIS_X86_NUMSLICE]; /* slice headers */ unsigned int timestamp[SOLARIS_X86_NUMSLICE]; /* timestamp (unsupported) */ char v_asciilabel[128]; /* for compatibility */ }; #endif /* CONFIG_SOLARIS_X86_PARTITION */ #ifdef CONFIG_BSD_DISKLABEL /* * BSD disklabel support by Yossi Gottlieb * updated by Marc Espie */ /* check against BSD src/sys/sys/disklabel.h for consistency */ #define BSD_DISKMAGIC (0x82564557UL) /* The disk magic number */ #define BSD_MAXPARTITIONS 8 #define OPENBSD_MAXPARTITIONS 16 #define BSD_FS_UNUSED 0 /* disklabel unused partition entry ID */ struct bsd_disklabel { __u32 d_magic; /* the magic number */ __s16 d_type; /* drive type */ __s16 d_subtype; /* controller/d_type specific */ char d_typename[16]; /* type name, e.g. "eagle" */ char d_packname[16]; /* pack identifier */ __u32 d_secsize; /* # of bytes per sector */ __u32 d_nsectors; /* # of data sectors per track */ __u32 d_ntracks; /* # of tracks per cylinder */ __u32 d_ncylinders; /* # of data cylinders per unit */ __u32 d_secpercyl; /* # of data sectors per cylinder */ __u32 d_secperunit; /* # of data sectors per unit */ __u16 d_sparespertrack; /* # of spare sectors per track */ __u16 d_sparespercyl; /* # of spare sectors per cylinder */ __u32 d_acylinders; /* # of alt. cylinders per unit */ __u16 d_rpm; /* rotational speed */ __u16 d_interleave; /* hardware sector interleave */ __u16 d_trackskew; /* sector 0 skew, per track */ __u16 d_cylskew; /* sector 0 skew, per cylinder */ __u32 d_headswitch; /* head switch time, usec */ __u32 d_trkseek; /* track-to-track seek, usec */ __u32 d_flags; /* generic flags */ #define NDDATA 5 __u32 d_drivedata[NDDATA]; /* drive-type specific information */ #define NSPARE 5 __u32 d_spare[NSPARE]; /* reserved for future use */ __u32 d_magic2; /* the magic number (again) */ __u16 d_checksum; /* xor of data incl. partitions */ /* filesystem and partition information: */ __u16 d_npartitions; /* number of partitions in following */ __u32 d_bbsize; /* size of boot area at sn0, bytes */ __u32 d_sbsize; /* max size of fs superblock, bytes */ struct bsd_partition { /* the partition table */ __u32 p_size; /* number of sectors in partition */ __u32 p_offset; /* starting sector */ __u32 p_fsize; /* filesystem basic fragment size */ __u8 p_fstype; /* filesystem type, see below */ __u8 p_frag; /* filesystem fragments per block */ __u16 p_cpg; /* filesystem cylinders per group */ } d_partitions[BSD_MAXPARTITIONS]; /* actually may be more */ }; #endif /* CONFIG_BSD_DISKLABEL */ #ifdef CONFIG_UNIXWARE_DISKLABEL /* * Unixware slices support by Andrzej Krzysztofowicz * and Krzysztof G. Baranowski */ #define UNIXWARE_DISKMAGIC (0xCA5E600DUL) /* The disk magic number */ #define UNIXWARE_DISKMAGIC2 (0x600DDEEEUL) /* The slice table magic nr */ #define UNIXWARE_NUMSLICE 16 #define UNIXWARE_FS_UNUSED 0 /* Unused slice entry ID */ struct unixware_slice { __u16 s_label; /* label */ __u16 s_flags; /* permission flags */ __u32 start_sect; /* starting sector */ __u32 nr_sects; /* number of sectors in slice */ }; struct unixware_disklabel { __u32 d_type; /* drive type */ __u32 d_magic; /* the magic number */ __u32 d_version; /* version number */ char d_serial[12]; /* serial number of the device */ __u32 d_ncylinders; /* # of data cylinders per device */ __u32 d_ntracks; /* # of tracks per cylinder */ __u32 d_nsectors; /* # of data sectors per track */ __u32 d_secsize; /* # of bytes per sector */ __u32 d_part_start; /* # of first sector of this partition */ __u32 d_unknown1[12]; /* ? */ __u32 d_alt_tbl; /* byte offset of alternate table */ __u32 d_alt_len; /* byte length of alternate table */ __u32 d_phys_cyl; /* # of physical cylinders per device */ __u32 d_phys_trk; /* # of physical tracks per cylinder */ __u32 d_phys_sec; /* # of physical sectors per track */ __u32 d_phys_bytes; /* # of physical bytes per sector */ __u32 d_unknown2; /* ? */ __u32 d_unknown3; /* ? */ __u32 d_pad[8]; /* pad */ struct unixware_vtoc { __u32 v_magic; /* the magic number */ __u32 v_version; /* version number */ char v_name[8]; /* volume name */ __u16 v_nslices; /* # of slices */ __u16 v_unknown1; /* ? */ __u32 v_reserved[10]; /* reserved */ struct unixware_slice v_slice[UNIXWARE_NUMSLICE]; /* slice headers */ } vtoc; }; /* 408 */ #endif /* CONFIG_UNIXWARE_DISKLABEL */ #ifdef CONFIG_MINIX_SUBPARTITION # define MINIX_NR_SUBPARTITIONS 4 #endif /* CONFIG_MINIX_SUBPARTITION */ #ifdef __KERNEL__ char *disk_name (struct gendisk *hd, int minor, char *buf); /* * Account for the completion of an IO request (used by drivers which * bypass the normal end_request processing) */ struct request; #ifdef CONFIG_BLK_STATS extern void disk_round_stats(struct hd_struct *hd); extern void req_new_io(struct request *req, int merge, int sectors); extern void req_merged_io(struct request *req); extern void req_finished_io(struct request *req); #else static inline void req_new_io(struct request *req, int merge, int sectors) { } static inline void req_merged_io(struct request *req) { } static inline void req_finished_io(struct request *req) { } #endif /* CONFIG_BLK_STATS */ extern void devfs_register_partitions (struct gendisk *dev, int minor, int unregister); /* * FIXME: this should use genhd->minor_shift, but that is slow to look up. */ static inline unsigned int disk_index (kdev_t dev) { int major = MAJOR(dev); int minor = MINOR(dev); unsigned int index; switch (major) { case DAC960_MAJOR+0: index = (minor & 0x00f8) >> 3; break; case SCSI_DISK0_MAJOR: index = (minor & 0x00f0) >> 4; break; case IDE0_MAJOR: /* same as HD_MAJOR */ case XT_DISK_MAJOR: index = (minor & 0x0040) >> 6; break; case IDE1_MAJOR: index = ((minor & 0x0040) >> 6) + 2; break; default: return 0; } return index; } #endif #endif