* <drew@colorado.edu>
*/
-#include <linux/config.h>
#include <linux/types.h>
-#include <linux/major.h>
-#include <linux/device.h>
-#include <linux/smp.h>
-#include <linux/string.h>
-#include <linux/fs.h>
+#include <linux/kdev_t.h>
+
+#ifdef CONFIG_BLOCK
+
+#define kobj_to_dev(k) container_of(k, struct device, kobj)
+#define dev_to_disk(device) container_of(device, struct gendisk, dev)
+#define dev_to_part(device) container_of(device, struct hd_struct, dev)
+
+extern struct device_type part_type;
+extern struct kobject *block_depr;
+extern struct class block_class;
+
+extern const struct seq_operations partitions_op;
+extern const struct seq_operations diskstats_op;
enum {
/* These three have identical behaviour; use the second one if DOS FDISK gets
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,
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
+#include <linux/major.h>
+#include <linux/device.h>
+#include <linux/smp.h>
+#include <linux/string.h>
+#include <linux/fs.h>
+#include <linux/workqueue.h>
-#ifdef __KERNEL__
struct partition {
unsigned char boot_ind; /* 0x80 - active */
unsigned char head; /* starting head */
__le32 nr_sects; /* nr of sectors in partition */
} __attribute__((packed));
+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 hd_struct {
sector_t start_sect;
sector_t nr_sects;
- struct kobject kobj;
- unsigned reads, read_sectors, writes, write_sectors;
+ struct device dev;
+ struct kobject *holder_dir;
int policy, partno;
+#ifdef CONFIG_FAIL_MAKE_REQUEST
+ int make_it_fail;
+#endif
+ unsigned long stamp;
+ int in_flight;
+#ifdef CONFIG_SMP
+ struct disk_stats *dkstats;
+#else
+ struct disk_stats dkstats;
+#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 read_sectors, write_sectors;
- unsigned reads, writes;
- unsigned read_merges, write_merges;
- unsigned read_ticks, write_ticks;
- unsigned io_ticks;
- unsigned time_in_queue;
-};
-
struct gendisk {
+ /* major, first_minor and minors are input parameters only,
+ * don't use directly. Use disk_devt() and disk_max_parts().
+ */
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 hd_struct **part; /* [indexed by minor - 1] */
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 device *driverfs_dev; // FIXME: remove
+ struct device dev;
+ struct kobject *holder_dir;
+ struct kobject *slave_dir;
struct timer_rand_state *random;
int policy;
atomic_t sync_io; /* RAID */
- unsigned long stamp, stamp_idle;
+ unsigned long stamp;
int in_flight;
#ifdef CONFIG_SMP
struct disk_stats *dkstats;
#else
struct disk_stats dkstats;
#endif
+ struct work_struct async_notify;
+#ifdef CONFIG_BLK_DEV_INTEGRITY
+ struct blk_integrity *integrity;
+#endif
};
-/* Structure for sysfs attributes on block devices */
-struct disk_attribute {
- struct attribute attr;
- ssize_t (*show)(struct gendisk *, char *);
-};
+static inline struct gendisk *part_to_disk(struct hd_struct *part)
+{
+ if (likely(part))
+ return dev_to_disk((part)->dev.parent);
+ return NULL;
+}
+
+static inline int disk_max_parts(struct gendisk *disk)
+{
+ return disk->minors - 1;
+}
+
+static inline dev_t disk_devt(struct gendisk *disk)
+{
+ return disk->dev.devt;
+}
+
+static inline dev_t part_devt(struct hd_struct *part)
+{
+ return part->dev.devt;
+}
/*
* Macros to operate on percpu disk statistics:
* The __ variants should only be called in critical sections. The full
* variants disable/enable preemption.
*/
+static inline struct hd_struct *disk_map_sector(struct gendisk *gendiskp,
+ sector_t sector)
+{
+ struct hd_struct *part;
+ int i;
+ for (i = 0; i < disk_max_parts(gendiskp); i++) {
+ part = gendiskp->part[i];
+ if (part && part->start_sect <= sector
+ && sector < part->start_sect + part->nr_sects)
+ return part;
+ }
+ return NULL;
+}
+
#ifdef CONFIG_SMP
#define __disk_stat_add(gendiskp, field, addnd) \
(per_cpu_ptr(gendiskp->dkstats, smp_processor_id())->field += addnd)
({ \
typeof(gendiskp->dkstats->field) res = 0; \
int i; \
- for (i=0; i < NR_CPUS; i++) { \
- if (!cpu_possible(i)) \
- continue; \
+ 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 (i=0; i < NR_CPUS; i++) {
- if (cpu_possible(i)) {
- memset(per_cpu_ptr(gendiskp->dkstats, i), value,
- sizeof (struct disk_stats));
- }
- }
+
+ for_each_possible_cpu(i)
+ memset(per_cpu_ptr(gendiskp->dkstats, i), value,
+ sizeof(struct disk_stats));
}
+
+#define __part_stat_add(part, field, addnd) \
+ (per_cpu_ptr(part->dkstats, smp_processor_id())->field += addnd)
+
+#define __all_stat_add(gendiskp, part, field, addnd, sector) \
+({ \
+ if (part) \
+ __part_stat_add(part, field, addnd); \
+ __disk_stat_add(gendiskp, field, addnd); \
+})
+
+#define part_stat_read(part, field) \
+({ \
+ typeof(part->dkstats->field) res = 0; \
+ int i; \
+ for_each_possible_cpu(i) \
+ res += per_cpu_ptr(part->dkstats, i)->field; \
+ res; \
+})
+
+static inline void part_stat_set_all(struct hd_struct *part, int value)
+{
+ int i;
+
+ for_each_possible_cpu(i)
+ memset(per_cpu_ptr(part->dkstats, i), value,
+ sizeof(struct disk_stats));
+}
-#else
+#else /* !CONFIG_SMP */
#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) {
+static inline void disk_stat_set_all(struct gendisk *gendiskp, int value)
+{
memset(&gendiskp->dkstats, value, sizeof (struct disk_stats));
}
-#endif
+
+#define __part_stat_add(part, field, addnd) \
+ (part->dkstats.field += addnd)
+
+#define __all_stat_add(gendiskp, part, field, addnd, sector) \
+({ \
+ if (part) \
+ part->dkstats.field += addnd; \
+ __disk_stat_add(gendiskp, field, addnd); \
+})
+
+#define part_stat_read(part, field) (part->dkstats.field)
+
+static inline void part_stat_set_all(struct hd_struct *part, int value)
+{
+ memset(&part->dkstats, value, sizeof(struct disk_stats));
+}
+
+#endif /* CONFIG_SMP */
#define disk_stat_add(gendiskp, field, addnd) \
do { \
#define disk_stat_sub(gendiskp, field, subnd) \
disk_stat_add(gendiskp, field, -subnd)
+#define part_stat_add(gendiskp, field, addnd) \
+ do { \
+ preempt_disable(); \
+ __part_stat_add(gendiskp, field, addnd);\
+ preempt_enable(); \
+ } while (0)
+
+#define __part_stat_dec(gendiskp, field) __part_stat_add(gendiskp, field, -1)
+#define part_stat_dec(gendiskp, field) part_stat_add(gendiskp, field, -1)
+
+#define __part_stat_inc(gendiskp, field) __part_stat_add(gendiskp, field, 1)
+#define part_stat_inc(gendiskp, field) part_stat_add(gendiskp, field, 1)
+
+#define __part_stat_sub(gendiskp, field, subnd) \
+ __part_stat_add(gendiskp, field, -subnd)
+#define part_stat_sub(gendiskp, field, subnd) \
+ part_stat_add(gendiskp, field, -subnd)
+
+#define all_stat_add(gendiskp, part, field, addnd, sector) \
+ do { \
+ preempt_disable(); \
+ __all_stat_add(gendiskp, part, field, addnd, sector); \
+ preempt_enable(); \
+ } while (0)
+
+#define __all_stat_dec(gendiskp, field, sector) \
+ __all_stat_add(gendiskp, field, -1, sector)
+#define all_stat_dec(gendiskp, field, sector) \
+ all_stat_add(gendiskp, field, -1, sector)
+
+#define __all_stat_inc(gendiskp, part, field, sector) \
+ __all_stat_add(gendiskp, part, field, 1, sector)
+#define all_stat_inc(gendiskp, part, field, sector) \
+ all_stat_add(gendiskp, part, field, 1, sector)
+
+#define __all_stat_sub(gendiskp, part, field, subnd, sector) \
+ __all_stat_add(gendiskp, part, field, -subnd, sector)
+#define all_stat_sub(gendiskp, part, field, subnd, sector) \
+ all_stat_add(gendiskp, part, field, -subnd, sector)
/* Inlines to alloc and free disk stats in struct gendisk */
#ifdef CONFIG_SMP
{
free_percpu(disk->dkstats);
}
+
+static inline int init_part_stats(struct hd_struct *part)
+{
+ part->dkstats = alloc_percpu(struct disk_stats);
+ if (!part->dkstats)
+ return 0;
+ return 1;
+}
+
+static inline void free_part_stats(struct hd_struct *part)
+{
+ free_percpu(part->dkstats);
+}
+
#else /* CONFIG_SMP */
static inline int init_disk_stats(struct gendisk *disk)
{
static inline void free_disk_stats(struct gendisk *disk)
{
}
+
+static inline int init_part_stats(struct hd_struct *part)
+{
+ return 1;
+}
+
+static inline void free_part_stats(struct hd_struct *part)
+{
+}
#endif /* CONFIG_SMP */
/* drivers/block/ll_rw_blk.c */
extern void disk_round_stats(struct gendisk *disk);
+extern void part_round_stats(struct hd_struct *part);
/* drivers/block/genhd.c */
-extern int get_blkdev_list(char *);
+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 struct gendisk *get_gendisk(dev_t dev, int *partno);
+extern struct block_device *bdget_disk(struct gendisk *disk, int partno);
extern void set_device_ro(struct block_device *bdev, int flag);
extern void set_disk_ro(struct gendisk *disk, int flag);
disk->capacity = size;
}
-#endif /* __KERNEL__ */
-
#ifdef CONFIG_SOLARIS_X86_PARTITION
-#define SOLARIS_X86_NUMSLICE 8
+#define SOLARIS_X86_NUMSLICE 16
#define SOLARIS_X86_VTOC_SANE (0x600DDEEEUL)
struct solaris_x86_slice {
# 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 dev_t blk_lookup_devt(const char *name, int partno);
+extern char *disk_name (struct gendisk *hd, int partno, 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 int __must_check 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 blk_register_region(dev_t dev, unsigned long range,
+extern void blk_register_region(dev_t devt, 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);
+extern void blk_unregister_region(dev_t devt, unsigned long range);
+
+#else /* CONFIG_BLOCK */
-static inline struct block_device *bdget_disk(struct gendisk *disk, int index)
+static inline void printk_all_partitions(void) { }
+
+static inline dev_t blk_lookup_devt(const char *name, int partno)
{
- return bdget(MKDEV(disk->major, disk->first_minor) + index);
+ dev_t devt = MKDEV(0, 0);
+ return devt;
}
-#endif
+#endif /* CONFIG_BLOCK */
-#endif
+#endif /* _LINUX_GENHD_H */
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff