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[/] [test_project/] [trunk/] [linux_sd_driver/] [include/] [linux/] [genhd.h] - Blame information for rev 81

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#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>
 
#ifdef CONFIG_BLOCK
 
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,
 
        SUN_WHOLE_DISK = DOS_EXTENDED_PARTITION,
 
        LINUX_SWAP_PARTITION = 0x82,
        LINUX_DATA_PARTITION = 0x83,
        LINUX_LVM_PARTITION = 0x8e,
        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__
#include <linux/major.h>
#include <linux/device.h>
#include <linux/smp.h>
#include <linux/string.h>
#include <linux/fs.h>
#include <linux/workqueue.h>
 
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;
        struct kobject *holder_dir;
        unsigned ios[2], sectors[2];    /* READs and WRITEs */
        int policy, partno;
#ifdef CONFIG_FAIL_MAKE_REQUEST
        int make_it_fail;
#endif
};
 
#define GENHD_FL_REMOVABLE                      1
#define GENHD_FL_DRIVERFS                       2
#define GENHD_FL_MEDIA_CHANGE_NOTIFY            4
#define GENHD_FL_CD                             8
#define GENHD_FL_UP                             16
#define GENHD_FL_SUPPRESS_PARTITION_INFO        32
#define GENHD_FL_FAIL                           64
 
struct disk_stats {
        unsigned long sectors[2];       /* READs and WRITEs */
        unsigned long ios[2];
        unsigned long merges[2];
        unsigned long ticks[2];
        unsigned long io_ticks;
        unsigned long 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] */
        int part_uevent_suppress;
        struct block_device_operations *fops;
        struct request_queue *queue;
        void *private_data;
        sector_t capacity;
 
        int flags;
        struct device *driverfs_dev;
        struct kobject kobj;
        struct kobject *holder_dir;
        struct kobject *slave_dir;
 
        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
        struct work_struct async_notify;
};
 
/* 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_each_possible_cpu(i)                                        \
                res += per_cpu_ptr(gendiskp->dkstats, i)->field;        \
        res;                                                            \
})
 
static inline void disk_stat_set_all(struct gendisk *gendiskp, int value)       {
        int i;
        for_each_possible_cpu(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__  */
 
#ifdef CONFIG_SOLARIS_X86_PARTITION
 
#define SOLARIS_X86_NUMSLICE    16
#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 */
};
 
#endif /* CONFIG_SOLARIS_X86_PARTITION */
 
#ifdef CONFIG_BSD_DISKLABEL
/*
 * 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 */
};
 
#endif  /* CONFIG_BSD_DISKLABEL */
 
#ifdef CONFIG_UNIXWARE_DISKLABEL
/*
 * 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 */
 
#endif /* CONFIG_UNIXWARE_DISKLABEL */
 
#ifdef CONFIG_MINIX_SUBPARTITION
#   define MINIX_NR_SUBPARTITIONS  4
#endif /* CONFIG_MINIX_SUBPARTITION */
 
#ifdef __KERNEL__
 
#define ADDPART_FLAG_NONE       0
#define ADDPART_FLAG_RAID       1
#define ADDPART_FLAG_WHOLEDISK  2
 
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, int);
extern void delete_partition(struct gendisk *, int);
extern void printk_all_partitions(void);
 
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 genhd_media_change_notify(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
 
#else /* CONFIG_BLOCK */
 
static inline void printk_all_partitions(void) { }
 
#endif /* CONFIG_BLOCK */
 
#endif

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[/] [test_project/] [trunk/] [linux_sd_driver/] [include/] [linux/] [genhd.h] - Blame information for rev 81

Line No.	Rev	Author	Line
1	62	marcus.erl	`#ifndef _LINUX_GENHD_H`
2			`#define _LINUX_GENHD_H`
3
4			`/*`
5			`* genhd.h Copyright (C) 1992 Drew Eckhardt`
6			`* Generic hard disk header file by`
7			`* Drew Eckhardt`
8			`*`
9			`* <drew@colorado.edu>`
10			`*/`
11
12			`#include <linux/types.h>`
13
14			`#ifdef CONFIG_BLOCK`
15
16			`enum {`
17			`/* These three have identical behaviour; use the second one if DOS FDISK gets`
18			`confused about extended/logical partitions starting past cylinder 1023. */`
19			`DOS_EXTENDED_PARTITION = 5,`
20			`LINUX_EXTENDED_PARTITION = 0x85,`
21			`WIN98_EXTENDED_PARTITION = 0x0f,`
22
23			`SUN_WHOLE_DISK = DOS_EXTENDED_PARTITION,`
24
25			`LINUX_SWAP_PARTITION = 0x82,`
26			`LINUX_DATA_PARTITION = 0x83,`
27			`LINUX_LVM_PARTITION = 0x8e,`
28			`LINUX_RAID_PARTITION = 0xfd, /* autodetect RAID partition */`
29
30			`SOLARIS_X86_PARTITION = LINUX_SWAP_PARTITION,`
31			`NEW_SOLARIS_X86_PARTITION = 0xbf,`
32
33			`DM6_AUX1PARTITION = 0x51, /* no DDO: use xlated geom */`
34			`DM6_AUX3PARTITION = 0x53, /* no DDO: use xlated geom */`
35			`DM6_PARTITION = 0x54, /* has DDO: use xlated geom & offset */`
36			`EZD_PARTITION = 0x55, /* EZ-DRIVE */`
37
38			`FREEBSD_PARTITION = 0xa5, /* FreeBSD Partition ID */`
39			`OPENBSD_PARTITION = 0xa6, /* OpenBSD Partition ID */`
40			`NETBSD_PARTITION = 0xa9, /* NetBSD Partition ID */`
41			`BSDI_PARTITION = 0xb7, /* BSDI Partition ID */`
42			`MINIX_PARTITION = 0x81, /* Minix Partition ID */`
43			`UNIXWARE_PARTITION = 0x63, /* Same as GNU_HURD and SCO Unix */`
44			`};`
45
46			`#ifndef __KERNEL__`
47
48			`struct partition {`
49			`unsigned char boot_ind; /* 0x80 - active */`
50			`unsigned char head; /* starting head */`
51			`unsigned char sector; /* starting sector */`
52			`unsigned char cyl; /* starting cylinder */`
53			`unsigned char sys_ind; /* What partition type */`
54			`unsigned char end_head; /* end head */`
55			`unsigned char end_sector; /* end sector */`
56			`unsigned char end_cyl; /* end cylinder */`
57			`unsigned int start_sect; /* starting sector counting from 0 */`
58			`unsigned int nr_sects; /* nr of sectors in partition */`
59			`} __attribute__((packed));`
60
61			`#endif`
62
63			`#ifdef __KERNEL__`
64			`#include <linux/major.h>`
65			`#include <linux/device.h>`
66			`#include <linux/smp.h>`
67			`#include <linux/string.h>`
68			`#include <linux/fs.h>`
69			`#include <linux/workqueue.h>`
70
71			`struct partition {`
72			`unsigned char boot_ind; /* 0x80 - active */`
73			`unsigned char head; /* starting head */`
74			`unsigned char sector; /* starting sector */`
75			`unsigned char cyl; /* starting cylinder */`
76			`unsigned char sys_ind; /* What partition type */`
77			`unsigned char end_head; /* end head */`
78			`unsigned char end_sector; /* end sector */`
79			`unsigned char end_cyl; /* end cylinder */`
80			`__le32 start_sect; /* starting sector counting from 0 */`
81			`__le32 nr_sects; /* nr of sectors in partition */`
82			`} __attribute__((packed));`
83
84			`struct hd_struct {`
85			`sector_t start_sect;`
86			`sector_t nr_sects;`
87			`struct kobject kobj;`
88			`struct kobject *holder_dir;`
89			`unsigned ios[2], sectors[2]; /* READs and WRITEs */`
90			`int policy, partno;`
91			`#ifdef CONFIG_FAIL_MAKE_REQUEST`
92			`int make_it_fail;`
93			`#endif`
94			`};`
95
96			`#define GENHD_FL_REMOVABLE 1`
97			`#define GENHD_FL_DRIVERFS 2`
98			`#define GENHD_FL_MEDIA_CHANGE_NOTIFY 4`
99			`#define GENHD_FL_CD 8`
100			`#define GENHD_FL_UP 16`
101			`#define GENHD_FL_SUPPRESS_PARTITION_INFO 32`
102			`#define GENHD_FL_FAIL 64`
103
104			`struct disk_stats {`
105			`unsigned long sectors[2]; /* READs and WRITEs */`
106			`unsigned long ios[2];`
107			`unsigned long merges[2];`
108			`unsigned long ticks[2];`
109			`unsigned long io_ticks;`
110			`unsigned long time_in_queue;`
111			`};`
112
113			`struct gendisk {`
114			`int major; /* major number of driver */`
115			`int first_minor;`
116			`int minors; /* maximum number of minors, =1 for`
117			`* disks that can't be partitioned. */`
118			`char disk_name[32]; /* name of major driver */`
119			`struct hd_struct *part; / [indexed by minor] */`
120			`int part_uevent_suppress;`
121			`struct block_device_operations *fops;`
122			`struct request_queue *queue;`
123			`void *private_data;`
124			`sector_t capacity;`
125
126			`int flags;`
127			`struct device *driverfs_dev;`
128			`struct kobject kobj;`
129			`struct kobject *holder_dir;`
130			`struct kobject *slave_dir;`
131
132			`struct timer_rand_state *random;`
133			`int policy;`
134
135			`atomic_t sync_io; /* RAID */`
136			`unsigned long stamp;`
137			`int in_flight;`
138			`#ifdef CONFIG_SMP`
139			`struct disk_stats *dkstats;`
140			`#else`
141			`struct disk_stats dkstats;`
142			`#endif`
143			`struct work_struct async_notify;`
144			`};`
145
146			`/* Structure for sysfs attributes on block devices */`
147			`struct disk_attribute {`
148			`struct attribute attr;`
149			`ssize_t (show)(struct gendisk , char *);`
150			`ssize_t (store)(struct gendisk , const char *, size_t);`
151			`};`
152
153			`/*`
154			`* Macros to operate on percpu disk statistics:`
155			`*`
156			`* The __ variants should only be called in critical sections. The full`
157			`* variants disable/enable preemption.`
158			`*/`
159			`#ifdef CONFIG_SMP`
160			`#define __disk_stat_add(gendiskp, field, addnd) \`
161			`(per_cpu_ptr(gendiskp->dkstats, smp_processor_id())->field += addnd)`
162
163			`#define disk_stat_read(gendiskp, field) \`
164			`({ \`
165			`typeof(gendiskp->dkstats->field) res = 0; \`
166			`int i; \`
167			`for_each_possible_cpu(i) \`
168			`res += per_cpu_ptr(gendiskp->dkstats, i)->field; \`
169			`res; \`
170			`})`
171
172			`static inline void disk_stat_set_all(struct gendisk *gendiskp, int value) {`
173			`int i;`
174			`for_each_possible_cpu(i)`
175			`memset(per_cpu_ptr(gendiskp->dkstats, i), value,`
176			`sizeof (struct disk_stats));`
177			`}`
178
179			`#else`
180			`#define __disk_stat_add(gendiskp, field, addnd) \`
181			`(gendiskp->dkstats.field += addnd)`
182			`#define disk_stat_read(gendiskp, field) (gendiskp->dkstats.field)`
183
184			`static inline void disk_stat_set_all(struct gendisk *gendiskp, int value) {`
185			`memset(&gendiskp->dkstats, value, sizeof (struct disk_stats));`
186			`}`
187			`#endif`
188
189			`#define disk_stat_add(gendiskp, field, addnd) \`
190			`do { \`
191			`preempt_disable(); \`
192			`__disk_stat_add(gendiskp, field, addnd); \`
193			`preempt_enable(); \`
194			`} while (0)`
195
196			`#define __disk_stat_dec(gendiskp, field) __disk_stat_add(gendiskp, field, -1)`
197			`#define disk_stat_dec(gendiskp, field) disk_stat_add(gendiskp, field, -1)`
198
199			`#define __disk_stat_inc(gendiskp, field) __disk_stat_add(gendiskp, field, 1)`
200			`#define disk_stat_inc(gendiskp, field) disk_stat_add(gendiskp, field, 1)`
201
202			`#define __disk_stat_sub(gendiskp, field, subnd) \`
203			`__disk_stat_add(gendiskp, field, -subnd)`
204			`#define disk_stat_sub(gendiskp, field, subnd) \`
205			`disk_stat_add(gendiskp, field, -subnd)`
206
207
208			`/* Inlines to alloc and free disk stats in struct gendisk */`
209			`#ifdef CONFIG_SMP`
210			`static inline int init_disk_stats(struct gendisk *disk)`
211			`{`
212			`disk->dkstats = alloc_percpu(struct disk_stats);`
213			`if (!disk->dkstats)`
214			`return 0;`
215			`return 1;`
216			`}`
217
218			`static inline void free_disk_stats(struct gendisk *disk)`
219			`{`
220			`free_percpu(disk->dkstats);`
221			`}`
222			`#else /* CONFIG_SMP */`
223			`static inline int init_disk_stats(struct gendisk *disk)`
224			`{`
225			`return 1;`
226			`}`
227
228			`static inline void free_disk_stats(struct gendisk *disk)`
229			`{`
230			`}`
231			`#endif /* CONFIG_SMP */`
232
233			`/* drivers/block/ll_rw_blk.c */`
234			`extern void disk_round_stats(struct gendisk *disk);`
235
236			`/* drivers/block/genhd.c */`
237			`extern int get_blkdev_list(char *, int);`
238			`extern void add_disk(struct gendisk *disk);`
239			`extern void del_gendisk(struct gendisk *gp);`
240			`extern void unlink_gendisk(struct gendisk *gp);`
241			`extern struct gendisk get_gendisk(dev_t dev, int part);`
242
243			`extern void set_device_ro(struct block_device *bdev, int flag);`
244			`extern void set_disk_ro(struct gendisk *disk, int flag);`
245
246			`/* drivers/char/random.c */`
247			`extern void add_disk_randomness(struct gendisk *disk);`
248			`extern void rand_initialize_disk(struct gendisk *disk);`
249
250			`static inline sector_t get_start_sect(struct block_device *bdev)`
251			`{`
252			`return bdev->bd_contains == bdev ? 0 : bdev->bd_part->start_sect;`
253			`}`
254			`static inline sector_t get_capacity(struct gendisk *disk)`
255			`{`
256			`return disk->capacity;`
257			`}`
258			`static inline void set_capacity(struct gendisk *disk, sector_t size)`
259			`{`
260			`disk->capacity = size;`
261			`}`
262
263			`#endif /* __KERNEL__ */`
264
265			`#ifdef CONFIG_SOLARIS_X86_PARTITION`
266
267			`#define SOLARIS_X86_NUMSLICE 16`
268			`#define SOLARIS_X86_VTOC_SANE (0x600DDEEEUL)`
269
270			`struct solaris_x86_slice {`
271			`__le16 s_tag; /* ID tag of partition */`
272			`__le16 s_flag; /* permission flags */`
273			`__le32 s_start; /* start sector no of partition */`
274			`__le32 s_size; /* # of blocks in partition */`
275			`};`
276
277			`struct solaris_x86_vtoc {`
278			`unsigned int v_bootinfo[3]; /* info needed by mboot (unsupported) */`
279			`__le32 v_sanity; /* to verify vtoc sanity */`
280			`__le32 v_version; /* layout version */`
281			`char v_volume[8]; /* volume name */`
282			`__le16 v_sectorsz; /* sector size in bytes */`
283			`__le16 v_nparts; /* number of partitions */`
284			`unsigned int v_reserved[10]; /* free space */`
285			`struct solaris_x86_slice`
286			`v_slice[SOLARIS_X86_NUMSLICE]; /* slice headers */`
287			`unsigned int timestamp[SOLARIS_X86_NUMSLICE]; /* timestamp (unsupported) */`
288			`char v_asciilabel[128]; /* for compatibility */`
289			`};`
290
291			`#endif /* CONFIG_SOLARIS_X86_PARTITION */`
292
293			`#ifdef CONFIG_BSD_DISKLABEL`
294			`/*`
295			`* BSD disklabel support by Yossi Gottlieb <yogo@math.tau.ac.il>`
296			`* updated by Marc Espie <Marc.Espie@openbsd.org>`
297			`*/`
298
299			`/* check against BSD src/sys/sys/disklabel.h for consistency */`
300
301			`#define BSD_DISKMAGIC (0x82564557UL) /* The disk magic number */`
302			`#define BSD_MAXPARTITIONS 16`
303			`#define OPENBSD_MAXPARTITIONS 16`
304			`#define BSD_FS_UNUSED 0 /* disklabel unused partition entry ID */`
305			`struct bsd_disklabel {`
306			`__le32 d_magic; /* the magic number */`
307			`__s16 d_type; /* drive type */`
308			`__s16 d_subtype; /* controller/d_type specific */`
309			`char d_typename[16]; /* type name, e.g. "eagle" */`
310			`char d_packname[16]; /* pack identifier */`
311			`__u32 d_secsize; /* # of bytes per sector */`
312			`__u32 d_nsectors; /* # of data sectors per track */`
313			`__u32 d_ntracks; /* # of tracks per cylinder */`
314			`__u32 d_ncylinders; /* # of data cylinders per unit */`
315			`__u32 d_secpercyl; /* # of data sectors per cylinder */`
316			`__u32 d_secperunit; /* # of data sectors per unit */`
317			`__u16 d_sparespertrack; /* # of spare sectors per track */`
318			`__u16 d_sparespercyl; /* # of spare sectors per cylinder */`
319			`__u32 d_acylinders; /* # of alt. cylinders per unit */`
320			`__u16 d_rpm; /* rotational speed */`
321			`__u16 d_interleave; /* hardware sector interleave */`
322			`__u16 d_trackskew; /* sector 0 skew, per track */`
323			`__u16 d_cylskew; /* sector 0 skew, per cylinder */`
324			`__u32 d_headswitch; /* head switch time, usec */`
325			`__u32 d_trkseek; /* track-to-track seek, usec */`
326			`__u32 d_flags; /* generic flags */`
327			`#define NDDATA 5`
328			`__u32 d_drivedata[NDDATA]; /* drive-type specific information */`
329			`#define NSPARE 5`
330			`__u32 d_spare[NSPARE]; /* reserved for future use */`
331			`__le32 d_magic2; /* the magic number (again) */`
332			`__le16 d_checksum; /* xor of data incl. partitions */`
333
334			`/* filesystem and partition information: */`
335			`__le16 d_npartitions; /* number of partitions in following */`
336			`__le32 d_bbsize; /* size of boot area at sn0, bytes */`
337			`__le32 d_sbsize; /* max size of fs superblock, bytes */`
338			`struct bsd_partition { /* the partition table */`
339			`__le32 p_size; /* number of sectors in partition */`
340			`__le32 p_offset; /* starting sector */`
341			`__le32 p_fsize; /* filesystem basic fragment size */`
342			`__u8 p_fstype; /* filesystem type, see below */`
343			`__u8 p_frag; /* filesystem fragments per block */`
344			`__le16 p_cpg; /* filesystem cylinders per group */`
345			`} d_partitions[BSD_MAXPARTITIONS]; /* actually may be more */`
346			`};`
347
348			`#endif /* CONFIG_BSD_DISKLABEL */`
349
350			`#ifdef CONFIG_UNIXWARE_DISKLABEL`
351			`/*`
352			`* Unixware slices support by Andrzej Krzysztofowicz <ankry@mif.pg.gda.pl>`
353			`* and Krzysztof G. Baranowski <kgb@knm.org.pl>`
354			`*/`
355
356			`#define UNIXWARE_DISKMAGIC (0xCA5E600DUL) /* The disk magic number */`
357			`#define UNIXWARE_DISKMAGIC2 (0x600DDEEEUL) /* The slice table magic nr */`
358			`#define UNIXWARE_NUMSLICE 16`
359			`#define UNIXWARE_FS_UNUSED 0 /* Unused slice entry ID */`
360
361			`struct unixware_slice {`
362			`__le16 s_label; /* label */`
363			`__le16 s_flags; /* permission flags */`
364			`__le32 start_sect; /* starting sector */`
365			`__le32 nr_sects; /* number of sectors in slice */`
366			`};`
367
368			`struct unixware_disklabel {`
369			`__le32 d_type; /* drive type */`
370			`__le32 d_magic; /* the magic number */`
371			`__le32 d_version; /* version number */`
372			`char d_serial[12]; /* serial number of the device */`
373			`__le32 d_ncylinders; /* # of data cylinders per device */`
374			`__le32 d_ntracks; /* # of tracks per cylinder */`
375			`__le32 d_nsectors; /* # of data sectors per track */`
376			`__le32 d_secsize; /* # of bytes per sector */`
377			`__le32 d_part_start; /* # of first sector of this partition */`
378			`__le32 d_unknown1[12]; /* ? */`
379			`__le32 d_alt_tbl; /* byte offset of alternate table */`
380			`__le32 d_alt_len; /* byte length of alternate table */`
381			`__le32 d_phys_cyl; /* # of physical cylinders per device */`
382			`__le32 d_phys_trk; /* # of physical tracks per cylinder */`
383			`__le32 d_phys_sec; /* # of physical sectors per track */`
384			`__le32 d_phys_bytes; /* # of physical bytes per sector */`
385			`__le32 d_unknown2; /* ? */`
386			`__le32 d_unknown3; /* ? */`
387			`__le32 d_pad[8]; /* pad */`
388
389			`struct unixware_vtoc {`
390			`__le32 v_magic; /* the magic number */`
391			`__le32 v_version; /* version number */`
392			`char v_name[8]; /* volume name */`
393			`__le16 v_nslices; /* # of slices */`
394			`__le16 v_unknown1; /* ? */`
395			`__le32 v_reserved[10]; /* reserved */`
396			`struct unixware_slice`
397			`v_slice[UNIXWARE_NUMSLICE]; /* slice headers */`
398			`} vtoc;`
399
400			`}; /* 408 */`
401
402			`#endif /* CONFIG_UNIXWARE_DISKLABEL */`
403
404			`#ifdef CONFIG_MINIX_SUBPARTITION`
405			`# define MINIX_NR_SUBPARTITIONS 4`
406			`#endif /* CONFIG_MINIX_SUBPARTITION */`
407
408			`#ifdef __KERNEL__`
409
410			`#define ADDPART_FLAG_NONE 0`
411			`#define ADDPART_FLAG_RAID 1`
412			`#define ADDPART_FLAG_WHOLEDISK 2`
413
414			`char disk_name (struct gendisk hd, int part, char *buf);`
415
416			`extern int rescan_partitions(struct gendisk disk, struct block_device bdev);`
417			`extern void add_partition(struct gendisk *, int, sector_t, sector_t, int);`
418			`extern void delete_partition(struct gendisk *, int);`
419			`extern void printk_all_partitions(void);`
420
421			`extern struct gendisk *alloc_disk_node(int minors, int node_id);`
422			`extern struct gendisk *alloc_disk(int minors);`
423			`extern struct kobject get_disk(struct gendisk disk);`
424			`extern void put_disk(struct gendisk *disk);`
425			`extern void genhd_media_change_notify(struct gendisk *disk);`
426			`extern void blk_register_region(dev_t dev, unsigned long range,`
427			`struct module *module,`
428			`struct kobject (probe)(dev_t, int , void ),`
429			`int (lock)(dev_t, void ),`
430			`void *data);`
431			`extern void blk_unregister_region(dev_t dev, unsigned long range);`
432
433			`static inline struct block_device bdget_disk(struct gendisk disk, int index)`
434			`{`
435			`return bdget(MKDEV(disk->major, disk->first_minor) + index);`
436			`}`
437
438			`#endif`
439
440			`#else /* CONFIG_BLOCK */`
441
442			`static inline void printk_all_partitions(void) { }`
443
444			`#endif /* CONFIG_BLOCK */`
445
446			`#endif`