X-Git-Url: http://pilppa.org/gitweb/gitweb.cgi?a=blobdiff_plain;f=include%2Flinux%2Fgenhd.h;h=ecd2bf63fc849e201f4825010293ba20a736d09b;hb=88787d2842b6e6ff9bdc218445209c5e3c84d6fa;hp=1dbea0ac5693049885c7c8ec33ec158dad1cb4bc;hpb=4f4ae0d42680889c62db4e1f3e6b4aa7787a7257;p=linux-2.6-omap-h63xx.git diff --git a/include/linux/genhd.h b/include/linux/genhd.h index 1dbea0ac569..ecd2bf63fc8 100644 --- a/include/linux/genhd.h +++ b/include/linux/genhd.h @@ -18,11 +18,13 @@ #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 disk_type; 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 confused about extended/logical partitions starting past cylinder 1023. */ @@ -53,24 +55,6 @@ enum { 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 #include #include @@ -91,15 +75,30 @@ struct partition { __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 device dev; 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 + unsigned long stamp; + int in_flight; +#ifdef CONFIG_SMP + struct disk_stats *dkstats; +#else + struct disk_stats dkstats; #endif }; @@ -111,15 +110,7 @@ struct hd_struct { #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; @@ -158,6 +149,20 @@ struct gendisk { * The __ variants should only be called in critical sections. The full * variants disable/enable preemption. */ +static inline struct hd_struct *get_part(struct gendisk *gendiskp, + sector_t sector) +{ + struct hd_struct *part; + int i; + for (i = 0; i < gendiskp->minors - 1; 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) @@ -177,16 +182,63 @@ static inline void disk_stat_set_all(struct gendisk *gendiskp, int value) { 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, field, addnd, sector) \ +({ \ + struct hd_struct *part = get_part(gendiskp, 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, field, addnd, sector) \ +({ \ + struct hd_struct *part = get_part(gendiskp, 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 { \ @@ -206,6 +258,45 @@ static inline void disk_stat_set_all(struct gendisk *gendiskp, int value) { #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, field, addnd, sector) \ + do { \ + preempt_disable(); \ + __all_stat_add(gendiskp, 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, field, sector) \ + __all_stat_add(gendiskp, field, 1, sector) +#define all_stat_inc(gendiskp, field, sector) \ + all_stat_add(gendiskp, field, 1, sector) + +#define __all_stat_sub(gendiskp, field, subnd, sector) \ + __all_stat_add(gendiskp, field, -subnd, sector) +#define all_stat_sub(gendiskp, field, subnd, sector) \ + all_stat_add(gendiskp, field, -subnd, sector) /* Inlines to alloc and free disk stats in struct gendisk */ #ifdef CONFIG_SMP @@ -221,6 +312,20 @@ static inline void free_disk_stats(struct gendisk *disk) { 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) { @@ -230,10 +335,20 @@ 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 *, int); @@ -262,8 +377,6 @@ 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 @@ -407,8 +520,6 @@ struct unixware_disklabel { # 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 @@ -425,7 +536,6 @@ 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 devt, unsigned long range, struct module *module, struct kobject *(*probe)(dev_t, int *, void *), @@ -438,8 +548,6 @@ 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) { } @@ -452,4 +560,4 @@ static inline dev_t blk_lookup_devt(const char *name) #endif /* CONFIG_BLOCK */ -#endif +#endif /* _LINUX_GENHD_H */