http://www.ousob.com --- Legacy Redefined OuSob - File: /wwwroot/clipx/usr/include/linux/genhd.h

#ifndef _LINUX_GENHD_H #define _LINUX_GENHD_H /* * genhd.h Copyright (C) 1992 Drew Eckhardt * Generic hard disk header file by * Drew Eckhardt * * <drew@colorado.edu> */ #include <linux/types.h> #include <linux/major.h> #ifdef __KERNEL__ #include <linux/device.h> #include <linux/smp.h> #include <linux/string.h> #include <linux/fs.h> #endif 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, NEW_SOLARIS_X86_PARTITION = 0xbf, DM6_AUX1PARTITION = 0x51, /* no DDO: use xlated geom */ DM6_AUX3PARTITION = 0x53, /* no DDO: use xlated geom */ DM6_PARTITION = 0x54, /* has DDO: use xlated geom & offset */ EZD_PARTITION = 0x55, /* EZ-DRIVE */ FREEBSD_PARTITION = 0xa5, /* FreeBSD Partition ID */ OPENBSD_PARTITION = 0xa6, /* OpenBSD Partition ID */ NETBSD_PARTITION = 0xa9, /* NetBSD Partition ID */ BSDI_PARTITION = 0xb7, /* BSDI Partition ID */ MINIX_PARTITION = 0x81, /* Minix Partition ID */ UNIXWARE_PARTITION = 0x63, /* Same as GNU_HURD and SCO Unix */ }; #ifndef __KERNEL__ 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)); #endif #ifdef __KERNEL__ 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 */ __le32 start_sect; /* starting sector counting from 0 */ __le32 nr_sects; /* nr of sectors in partition */ } __attribute__((packed)); struct hd_struct { sector_t start_sect; sector_t nr_sects; struct kobject kobj; unsigned ios[2], sectors[2]; /* READs and WRITEs */ int policy, partno; }; #define GENHD_FL_REMOVABLE 1 #define GENHD_FL_DRIVERFS 2 #define GENHD_FL_CD 8 #define GENHD_FL_UP 16 #define GENHD_FL_SUPPRESS_PARTITION_INFO 32 struct disk_stats { unsigned sectors[2]; /* READs and WRITEs */ unsigned ios[2]; unsigned merges[2]; unsigned ticks[2]; unsigned io_ticks; unsigned time_in_queue; }; struct gendisk { int major; /* major number of driver */ int first_minor; int minors; /* maximum number of minors, =1 for * disks that can't be partitioned. */ char disk_name[32]; /* name of major driver */ struct hd_struct **part; /* [indexed by minor] */ struct block_device_operations *fops; struct request_queue *queue; void *private_data; sector_t capacity; int flags; char devfs_name[64]; /* devfs crap */ int number; /* more of the same */ struct device *driverfs_dev; struct kobject kobj; struct timer_rand_state *random; int policy; atomic_t sync_io; /* RAID */ unsigned long stamp; int in_flight; #ifdef CONFIG_SMP struct disk_stats *dkstats; #else struct disk_stats dkstats; #endif }; /* Structure for sysfs attributes on block devices */ struct disk_attribute { struct attribute attr; ssize_t (*show)(struct gendisk *, char *); ssize_t (*store)(struct gendisk *, const char *, size_t); }; /* * Macros to operate on percpu disk statistics: * * The __ variants should only be called in critical sections. The full * variants disable/enable preemption. */ #ifdef CONFIG_SMP #define __disk_stat_add(gendiskp, field, addnd) \ (per_cpu_ptr(gendiskp->dkstats, smp_processor_id())->field += addnd) #define disk_stat_read(gendiskp, field) \ ({ \ typeof(gendiskp->dkstats->field) res = 0; \ int i; \ for (i=0; i < NR_CPUS; i++) { \ if (!cpu_possible(i)) \ continue; \ res += per_cpu_ptr(gendiskp->dkstats, i)->field; \ } \ res; \ }) static inline void disk_stat_set_all(struct gendisk *gendiskp, int value) { int i; for (i=0; i < NR_CPUS; i++) { if (cpu_possible(i)) { memset(per_cpu_ptr(gendiskp->dkstats, i), value, sizeof (struct disk_stats)); } } } #else #define __disk_stat_add(gendiskp, field, addnd) \ (gendiskp->dkstats.field += addnd) #define disk_stat_read(gendiskp, field) (gendiskp->dkstats.field) static inline void disk_stat_set_all(struct gendisk *gendiskp, int value) { memset(&gendiskp->dkstats, value, sizeof (struct disk_stats)); } #endif #define disk_stat_add(gendiskp, field, addnd) \ do { \ preempt_disable(); \ __disk_stat_add(gendiskp, field, addnd); \ preempt_enable(); \ } while (0) #define __disk_stat_dec(gendiskp, field) __disk_stat_add(gendiskp, field, -1) #define disk_stat_dec(gendiskp, field) disk_stat_add(gendiskp, field, -1) #define __disk_stat_inc(gendiskp, field) __disk_stat_add(gendiskp, field, 1) #define disk_stat_inc(gendiskp, field) disk_stat_add(gendiskp, field, 1) #define __disk_stat_sub(gendiskp, field, subnd) \ __disk_stat_add(gendiskp, field, -subnd) #define disk_stat_sub(gendiskp, field, subnd) \ disk_stat_add(gendiskp, field, -subnd) /* Inlines to alloc and free disk stats in struct gendisk */ #ifdef CONFIG_SMP static inline int init_disk_stats(struct gendisk *disk) { disk->dkstats = alloc_percpu(struct disk_stats); if (!disk->dkstats) return 0; return 1; } static inline void free_disk_stats(struct gendisk *disk) { free_percpu(disk->dkstats); } #else /* CONFIG_SMP */ static inline int init_disk_stats(struct gendisk *disk) { return 1; } static inline void free_disk_stats(struct gendisk *disk) { } #endif /* CONFIG_SMP */ /* drivers/block/ll_rw_blk.c */ extern void disk_round_stats(struct gendisk *disk); /* drivers/block/genhd.c */ extern int get_blkdev_list(char *, int); extern void add_disk(struct gendisk *disk); extern void del_gendisk(struct gendisk *gp); extern void unlink_gendisk(struct gendisk *gp); extern struct gendisk *get_gendisk(dev_t dev, int *part); extern void set_device_ro(struct block_device *bdev, int flag); extern void set_disk_ro(struct gendisk *disk, int flag); /* drivers/char/random.c */ extern void add_disk_randomness(struct gendisk *disk); extern void rand_initialize_disk(struct gendisk *disk); static inline sector_t get_start_sect(struct block_device *bdev) { return bdev->bd_contains == bdev ? 0 : bdev->bd_part->start_sect; } static inline sector_t get_capacity(struct gendisk *disk) { return disk->capacity; } static inline void set_capacity(struct gendisk *disk, sector_t size) { disk->capacity = size; } #endif /* __KERNEL__ */ #define SOLARIS_X86_NUMSLICE 8 #define SOLARIS_X86_VTOC_SANE (0x600DDEEEUL) struct solaris_x86_slice { __le16 s_tag; /* ID tag of partition */ __le16 s_flag; /* permission flags */ __le32 s_start; /* start sector no of partition */ __le32 s_size; /* # of blocks in partition */ }; struct solaris_x86_vtoc { unsigned int v_bootinfo[3]; /* info needed by mboot (unsupported) */ __le32 v_sanity; /* to verify vtoc sanity */ __le32 v_version; /* layout version */ char v_volume[8]; /* volume name */ __le16 v_sectorsz; /* sector size in bytes */ __le16 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 */ }; /* * BSD disklabel support by Yossi Gottlieb <yogo@math.tau.ac.il> * updated by Marc Espie <Marc.Espie@openbsd.org> */ /* check against BSD src/sys/sys/disklabel.h for consistency */ #define BSD_DISKMAGIC (0x82564557UL) /* The disk magic number */ #define BSD_MAXPARTITIONS 16 #define OPENBSD_MAXPARTITIONS 16 #define BSD_FS_UNUSED 0 /* disklabel unused partition entry ID */ struct bsd_disklabel { __le32 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 */ __le32 d_magic2; /* the magic number (again) */ __le16 d_checksum; /* xor of data incl. partitions */ /* filesystem and partition information: */ __le16 d_npartitions; /* number of partitions in following */ __le32 d_bbsize; /* size of boot area at sn0, bytes */ __le32 d_sbsize; /* max size of fs superblock, bytes */ struct bsd_partition { /* the partition table */ __le32 p_size; /* number of sectors in partition */ __le32 p_offset; /* starting sector */ __le32 p_fsize; /* filesystem basic fragment size */ __u8 p_fstype; /* filesystem type, see below */ __u8 p_frag; /* filesystem fragments per block */ __le16 p_cpg; /* filesystem cylinders per group */ } d_partitions[BSD_MAXPARTITIONS]; /* actually may be more */ }; /* * Unixware slices support by Andrzej Krzysztofowicz <ankry@mif.pg.gda.pl> * and Krzysztof G. Baranowski <kgb@knm.org.pl> */ #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 { __le16 s_label; /* label */ __le16 s_flags; /* permission flags */ __le32 start_sect; /* starting sector */ __le32 nr_sects; /* number of sectors in slice */ }; struct unixware_disklabel { __le32 d_type; /* drive type */ __le32 d_magic; /* the magic number */ __le32 d_version; /* version number */ char d_serial[12]; /* serial number of the device */ __le32 d_ncylinders; /* # of data cylinders per device */ __le32 d_ntracks; /* # of tracks per cylinder */ __le32 d_nsectors; /* # of data sectors per track */ __le32 d_secsize; /* # of bytes per sector */ __le32 d_part_start; /* # of first sector of this partition */ __le32 d_unknown1[12]; /* ? */ __le32 d_alt_tbl; /* byte offset of alternate table */ __le32 d_alt_len; /* byte length of alternate table */ __le32 d_phys_cyl; /* # of physical cylinders per device */ __le32 d_phys_trk; /* # of physical tracks per cylinder */ __le32 d_phys_sec; /* # of physical sectors per track */ __le32 d_phys_bytes; /* # of physical bytes per sector */ __le32 d_unknown2; /* ? */ __le32 d_unknown3; /* ? */ __le32 d_pad[8]; /* pad */ struct unixware_vtoc { __le32 v_magic; /* the magic number */ __le32 v_version; /* version number */ char v_name[8]; /* volume name */ __le16 v_nslices; /* # of slices */ __le16 v_unknown1; /* ? */ __le32 v_reserved[10]; /* reserved */ struct unixware_slice v_slice[UNIXWARE_NUMSLICE]; /* slice headers */ } vtoc; }; /* 408 */ #ifdef CONFIG_MINIX_SUBPARTITION # define MINIX_NR_SUBPARTITIONS 4 #endif /* CONFIG_MINIX_SUBPARTITION */ #ifdef __KERNEL__ char *disk_name (struct gendisk *hd, int part, char *buf); extern int rescan_partitions(struct gendisk *disk, struct block_device *bdev); extern void add_partition(struct gendisk *, int, sector_t, sector_t); extern void delete_partition(struct gendisk *, int); extern struct gendisk *alloc_disk_node(int minors, int node_id); extern struct gendisk *alloc_disk(int minors); extern struct kobject *get_disk(struct gendisk *disk); extern void put_disk(struct gendisk *disk); extern void blk_register_region(dev_t dev, unsigned long range, struct module *module, struct kobject *(*probe)(dev_t, int *, void *), int (*lock)(dev_t, void *), void *data); extern void blk_unregister_region(dev_t dev, unsigned long range); static inline struct block_device *bdget_disk(struct gendisk *disk, int index) { return bdget(MKDEV(disk->major, disk->first_minor) + index); } #endif #endif