diff options
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/blkdev.h | 273 | ||||
| -rw-r--r-- | include/linux/genhd.h | 287 | ||||
| -rw-r--r-- | include/linux/part_stat.h | 2 |
3 files changed, 271 insertions, 291 deletions
diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h index f35aea98bc35..99a4384bb8a5 100644 --- a/include/linux/blkdev.h +++ b/include/linux/blkdev.h @@ -1,9 +1,13 @@ /* SPDX-License-Identifier: GPL-2.0 */ +/* + * Portions Copyright (C) 1992 Drew Eckhardt + */ #ifndef _LINUX_BLKDEV_H #define _LINUX_BLKDEV_H -#include <linux/sched.h> -#include <linux/genhd.h> +#include <linux/types.h> +#include <linux/blk_types.h> +#include <linux/device.h> #include <linux/list.h> #include <linux/llist.h> #include <linux/minmax.h> @@ -12,11 +16,15 @@ #include <linux/wait.h> #include <linux/bio.h> #include <linux/gfp.h> +#include <linux/kdev_t.h> #include <linux/rcupdate.h> #include <linux/percpu-refcount.h> #include <linux/blkzoned.h> +#include <linux/sched.h> #include <linux/sbitmap.h> #include <linux/srcu.h> +#include <linux/uuid.h> +#include <linux/xarray.h> struct module; struct request_queue; @@ -33,6 +41,10 @@ struct blk_queue_stats; struct blk_stat_callback; struct blk_crypto_profile; +extern const struct device_type disk_type; +extern struct device_type part_type; +extern struct class block_class; + /* Must be consistent with blk_mq_poll_stats_bkt() */ #define BLK_MQ_POLL_STATS_BKTS 16 @@ -45,6 +57,144 @@ struct blk_crypto_profile; */ #define BLKCG_MAX_POLS 6 +#define DISK_MAX_PARTS 256 +#define DISK_NAME_LEN 32 + +#define PARTITION_META_INFO_VOLNAMELTH 64 +/* + * Enough for the string representation of any kind of UUID plus NULL. + * EFI UUID is 36 characters. MSDOS UUID is 11 characters. + */ +#define PARTITION_META_INFO_UUIDLTH (UUID_STRING_LEN + 1) + +struct partition_meta_info { + char uuid[PARTITION_META_INFO_UUIDLTH]; + u8 volname[PARTITION_META_INFO_VOLNAMELTH]; +}; + +/** + * DOC: genhd capability flags + * + * ``GENHD_FL_REMOVABLE``: indicates that the block device gives access to + * removable media. When set, the device remains present even when media is not + * inserted. Shall not be set for devices which are removed entirely when the + * media is removed. + * + * ``GENHD_FL_HIDDEN``: the block device is hidden; it doesn't produce events, + * doesn't appear in sysfs, and can't be opened from userspace or using + * blkdev_get*. Used for the underlying components of multipath devices. + * + * ``GENHD_FL_NO_PART``: partition support is disabled. The kernel will not + * scan for partitions from add_disk, and users can't add partitions manually. + * + */ +enum { + GENHD_FL_REMOVABLE = 1 << 0, + GENHD_FL_HIDDEN = 1 << 1, + GENHD_FL_NO_PART = 1 << 2, +}; + +enum { + DISK_EVENT_MEDIA_CHANGE = 1 << 0, /* media changed */ + DISK_EVENT_EJECT_REQUEST = 1 << 1, /* eject requested */ +}; + +enum { + /* Poll even if events_poll_msecs is unset */ + DISK_EVENT_FLAG_POLL = 1 << 0, + /* Forward events to udev */ + DISK_EVENT_FLAG_UEVENT = 1 << 1, + /* Block event polling when open for exclusive write */ + DISK_EVENT_FLAG_BLOCK_ON_EXCL_WRITE = 1 << 2, +}; + +struct disk_events; +struct badblocks; + +struct blk_integrity { + const struct blk_integrity_profile *profile; + unsigned char flags; + unsigned char tuple_size; + unsigned char interval_exp; + unsigned char tag_size; +}; + +struct gendisk { + /* + * major/first_minor/minors should not be set by any new driver, the + * block core will take care of allocating them automatically. + */ + int major; + int first_minor; + int minors; + + char disk_name[DISK_NAME_LEN]; /* name of major driver */ + + unsigned short events; /* supported events */ + unsigned short event_flags; /* flags related to event processing */ + + struct xarray part_tbl; + struct block_device *part0; + + const struct block_device_operations *fops; + struct request_queue *queue; + void *private_data; + + int flags; + unsigned long state; +#define GD_NEED_PART_SCAN 0 +#define GD_READ_ONLY 1 +#define GD_DEAD 2 +#define GD_NATIVE_CAPACITY 3 + + struct mutex open_mutex; /* open/close mutex */ + unsigned open_partitions; /* number of open partitions */ + + struct backing_dev_info *bdi; + struct kobject *slave_dir; +#ifdef CONFIG_BLOCK_HOLDER_DEPRECATED + struct list_head slave_bdevs; +#endif + struct timer_rand_state *random; + atomic_t sync_io; /* RAID */ + struct disk_events *ev; +#ifdef CONFIG_BLK_DEV_INTEGRITY + struct kobject integrity_kobj; +#endif /* CONFIG_BLK_DEV_INTEGRITY */ +#if IS_ENABLED(CONFIG_CDROM) + struct cdrom_device_info *cdi; +#endif + int node_id; + struct badblocks *bb; + struct lockdep_map lockdep_map; + u64 diskseq; +}; + +static inline bool disk_live(struct gendisk *disk) +{ + return !inode_unhashed(disk->part0->bd_inode); +} + +/* + * The gendisk is refcounted by the part0 block_device, and the bd_device + * therein is also used for device model presentation in sysfs. + */ +#define dev_to_disk(device) \ + (dev_to_bdev(device)->bd_disk) +#define disk_to_dev(disk) \ + (&((disk)->part0->bd_device)) + +#if IS_REACHABLE(CONFIG_CDROM) +#define disk_to_cdi(disk) ((disk)->cdi) +#else +#define disk_to_cdi(disk) NULL +#endif + +static inline dev_t disk_devt(struct gendisk *disk) +{ + return MKDEV(disk->major, disk->first_minor); +} + static inline int blk_validate_block_size(unsigned long bsize) { if (bsize < 512 || bsize > PAGE_SIZE || !is_power_of_2(bsize)) @@ -596,6 +746,118 @@ static inline unsigned int blk_queue_depth(struct request_queue *q) #define for_each_bio(_bio) \ for (; _bio; _bio = _bio->bi_next) +int __must_check device_add_disk(struct device *parent, struct gendisk *disk, + const struct attribute_group **groups); +static inline int __must_check add_disk(struct gendisk *disk) +{ + return device_add_disk(NULL, disk, NULL); +} +void del_gendisk(struct gendisk *gp); +void invalidate_disk(struct gendisk *disk); +void set_disk_ro(struct gendisk *disk, bool read_only); +void disk_uevent(struct gendisk *disk, enum kobject_action action); + +static inline int get_disk_ro(struct gendisk *disk) +{ + return disk->part0->bd_read_only || + test_bit(GD_READ_ONLY, &disk->state); +} + +static inline int bdev_read_only(struct block_device *bdev) +{ + return bdev->bd_read_only || get_disk_ro(bdev->bd_disk); +} + +bool set_capacity_and_notify(struct gendisk *disk, sector_t size); +bool disk_force_media_change(struct gendisk *disk, unsigned int events); + +void add_disk_randomness(struct gendisk *disk) __latent_entropy; +void rand_initialize_disk(struct gendisk *disk); + +static inline sector_t get_start_sect(struct block_device *bdev) +{ + return bdev->bd_start_sect; +} + +static inline sector_t bdev_nr_sectors(struct block_device *bdev) +{ + return bdev->bd_nr_sectors; +} + +static inline loff_t bdev_nr_bytes(struct block_device *bdev) +{ + return (loff_t)bdev_nr_sectors(bdev) << SECTOR_SHIFT; +} + +static inline sector_t get_capacity(struct gendisk *disk) +{ + return bdev_nr_sectors(disk->part0); +} + +static inline u64 sb_bdev_nr_blocks(struct super_block *sb) +{ + return bdev_nr_sectors(sb->s_bdev) >> + (sb->s_blocksize_bits - SECTOR_SHIFT); +} + +int bdev_disk_changed(struct gendisk *disk, bool invalidate); + +struct gendisk *__alloc_disk_node(struct request_queue *q, int node_id, + struct lock_class_key *lkclass); +void put_disk(struct gendisk *disk); +struct gendisk *__blk_alloc_disk(int node, struct lock_class_key *lkclass); + +/** + * blk_alloc_disk - allocate a gendisk structure + * @node_id: numa node to allocate on + * + * Allocate and pre-initialize a gendisk structure for use with BIO based + * drivers. + * + * Context: can sleep + */ +#define blk_alloc_disk(node_id) \ +({ \ + static struct lock_class_key __key; \ + \ + __blk_alloc_disk(node_id, &__key); \ +}) +void blk_cleanup_disk(struct gendisk *disk); + +int __register_blkdev(unsigned int major, const char *name, + void (*probe)(dev_t devt)); +#define register_blkdev(major, name) \ + __register_blkdev(major, name, NULL) +void unregister_blkdev(unsigned int major, const char *name); + +bool bdev_check_media_change(struct block_device *bdev); +int __invalidate_device(struct block_device *bdev, bool kill_dirty); +void set_capacity(struct gendisk *disk, sector_t size); + +#ifdef CONFIG_BLOCK_HOLDER_DEPRECATED +int bd_link_disk_holder(struct block_device *bdev, struct gendisk *disk); +void bd_unlink_disk_holder(struct block_device *bdev, struct gendisk *disk); +int bd_register_pending_holders(struct gendisk *disk); +#else +static inline int bd_link_disk_holder(struct block_device *bdev, + struct gendisk *disk) +{ + return 0; +} +static inline void bd_unlink_disk_holder(struct block_device *bdev, + struct gendisk *disk) +{ +} +static inline int bd_register_pending_holders(struct gendisk *disk) +{ + return 0; +} +#endif /* CONFIG_BLOCK_HOLDER_DEPRECATED */ + +dev_t part_devt(struct gendisk *disk, u8 partno); +void inc_diskseq(struct gendisk *disk); +dev_t blk_lookup_devt(const char *name, int partno); +void blk_request_module(dev_t devt); extern int blk_register_queue(struct gendisk *disk); extern void blk_unregister_queue(struct gendisk *disk); @@ -1311,6 +1573,7 @@ void invalidate_bdev(struct block_device *bdev); int sync_blockdev(struct block_device *bdev); int sync_blockdev_nowait(struct block_device *bdev); void sync_bdevs(bool wait); +void printk_all_partitions(void); #else static inline void invalidate_bdev(struct block_device *bdev) { @@ -1326,7 +1589,11 @@ static inline int sync_blockdev_nowait(struct block_device *bdev) static inline void sync_bdevs(bool wait) { } -#endif +static inline void printk_all_partitions(void) +{ +} +#endif /* CONFIG_BLOCK */ + int fsync_bdev(struct block_device *bdev); int freeze_bdev(struct block_device *bdev); diff --git a/include/linux/genhd.h b/include/linux/genhd.h deleted file mode 100644 index aa4bd985dbe5..000000000000 --- a/include/linux/genhd.h +++ /dev/null @@ -1,287 +0,0 @@ -/* SPDX-License-Identifier: GPL-2.0 */ -#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/kdev_t.h> -#include <linux/uuid.h> -#include <linux/blk_types.h> -#include <linux/device.h> -#include <linux/xarray.h> - -extern const struct device_type disk_type; -extern struct device_type part_type; -extern struct class block_class; - -#define DISK_MAX_PARTS 256 -#define DISK_NAME_LEN 32 - -#define PARTITION_META_INFO_VOLNAMELTH 64 -/* - * Enough for the string representation of any kind of UUID plus NULL. - * EFI UUID is 36 characters. MSDOS UUID is 11 characters. - */ -#define PARTITION_META_INFO_UUIDLTH (UUID_STRING_LEN + 1) - -struct partition_meta_info { - char uuid[PARTITION_META_INFO_UUIDLTH]; - u8 volname[PARTITION_META_INFO_VOLNAMELTH]; -}; - -/** - * DOC: genhd capability flags - * - * ``GENHD_FL_REMOVABLE``: indicates that the block device gives access to - * removable media. When set, the device remains present even when media is not - * inserted. Shall not be set for devices which are removed entirely when the - * media is removed. - * - * ``GENHD_FL_HIDDEN``: the block device is hidden; it doesn't produce events, - * doesn't appear in sysfs, and can't be opened from userspace or using - * blkdev_get*. Used for the underlying components of multipath devices. - * - * ``GENHD_FL_NO_PART``: partition support is disabled. The kernel will not - * scan for partitions from add_disk, and users can't add partitions manually. - * - */ -enum { - GENHD_FL_REMOVABLE = 1 << 0, - GENHD_FL_HIDDEN = 1 << 1, - GENHD_FL_NO_PART = 1 << 2, -}; - -enum { - DISK_EVENT_MEDIA_CHANGE = 1 << 0, /* media changed */ - DISK_EVENT_EJECT_REQUEST = 1 << 1, /* eject requested */ -}; - -enum { - /* Poll even if events_poll_msecs is unset */ - DISK_EVENT_FLAG_POLL = 1 << 0, - /* Forward events to udev */ - DISK_EVENT_FLAG_UEVENT = 1 << 1, - /* Block event polling when open for exclusive write */ - DISK_EVENT_FLAG_BLOCK_ON_EXCL_WRITE = 1 << 2, -}; - -struct disk_events; -struct badblocks; - -struct blk_integrity { - const struct blk_integrity_profile *profile; - unsigned char flags; - unsigned char tuple_size; - unsigned char interval_exp; - unsigned char tag_size; -}; - -struct gendisk { - /* - * major/first_minor/minors should not be set by any new driver, the - * block core will take care of allocating them automatically. - */ - int major; - int first_minor; - int minors; - - char disk_name[DISK_NAME_LEN]; /* name of major driver */ - - unsigned short events; /* supported events */ - unsigned short event_flags; /* flags related to event processing */ - - struct xarray part_tbl; - struct block_device *part0; - - const struct block_device_operations *fops; - struct request_queue *queue; - void *private_data; - - int flags; - unsigned long state; -#define GD_NEED_PART_SCAN 0 -#define GD_READ_ONLY 1 -#define GD_DEAD 2 -#define GD_NATIVE_CAPACITY 3 - - struct mutex open_mutex; /* open/close mutex */ - unsigned open_partitions; /* number of open partitions */ - - struct backing_dev_info *bdi; - struct kobject *slave_dir; -#ifdef CONFIG_BLOCK_HOLDER_DEPRECATED - struct list_head slave_bdevs; -#endif - struct timer_rand_state *random; - atomic_t sync_io; /* RAID */ - struct disk_events *ev; -#ifdef CONFIG_BLK_DEV_INTEGRITY - struct kobject integrity_kobj; -#endif /* CONFIG_BLK_DEV_INTEGRITY */ -#if IS_ENABLED(CONFIG_CDROM) - struct cdrom_device_info *cdi; -#endif - int node_id; - struct badblocks *bb; - struct lockdep_map lockdep_map; - u64 diskseq; -}; - -static inline bool disk_live(struct gendisk *disk) -{ - return !inode_unhashed(disk->part0->bd_inode); -} - -/* - * The gendisk is refcounted by the part0 block_device, and the bd_device - * therein is also used for device model presentation in sysfs. - */ -#define dev_to_disk(device) \ - (dev_to_bdev(device)->bd_disk) -#define disk_to_dev(disk) \ - (&((disk)->part0->bd_device)) - -#if IS_REACHABLE(CONFIG_CDROM) -#define disk_to_cdi(disk) ((disk)->cdi) -#else -#define disk_to_cdi(disk) NULL -#endif - -static inline dev_t disk_devt(struct gendisk *disk) -{ - return MKDEV(disk->major, disk->first_minor); -} - -void disk_uevent(struct gendisk *disk, enum kobject_action action); - -/* block/genhd.c */ -int __must_check device_add_disk(struct device *parent, struct gendisk *disk, - const struct attribute_group **groups); -static inline int __must_check add_disk(struct gendisk *disk) -{ - return device_add_disk(NULL, disk, NULL); -} -extern void del_gendisk(struct gendisk *gp); - -void invalidate_disk(struct gendisk *disk); - -void set_disk_ro(struct gendisk *disk, bool read_only); - -static inline int get_disk_ro(struct gendisk *disk) -{ - return disk->part0->bd_read_only || - test_bit(GD_READ_ONLY, &disk->state); -} - -static inline int bdev_read_only(struct block_device *bdev) -{ - return bdev->bd_read_only || get_disk_ro(bdev->bd_disk); -} - -bool set_capacity_and_notify(struct gendisk *disk, sector_t size); -bool disk_force_media_change(struct gendisk *disk, unsigned int events); - -/* drivers/char/random.c */ -extern void add_disk_randomness(struct gendisk *disk) __latent_entropy; -extern void rand_initialize_disk(struct gendisk *disk); - -static inline sector_t get_start_sect(struct block_device *bdev) -{ - return bdev->bd_start_sect; -} - -static inline sector_t bdev_nr_sectors(struct block_device *bdev) -{ - return bdev->bd_nr_sectors; -} - -static inline loff_t bdev_nr_bytes(struct block_device *bdev) -{ - return (loff_t)bdev_nr_sectors(bdev) << SECTOR_SHIFT; -} - -static inline sector_t get_capacity(struct gendisk *disk) -{ - return bdev_nr_sectors(disk->part0); -} - -static inline u64 sb_bdev_nr_blocks(struct super_block *sb) -{ - return bdev_nr_sectors(sb->s_bdev) >> - (sb->s_blocksize_bits - SECTOR_SHIFT); -} - -int bdev_disk_changed(struct gendisk *disk, bool invalidate); - -struct gendisk *__alloc_disk_node(struct request_queue *q, int node_id, - struct lock_class_key *lkclass); -extern void put_disk(struct gendisk *disk); -struct gendisk *__blk_alloc_disk(int node, struct lock_class_key *lkclass); - -/** - * blk_alloc_disk - allocate a gendisk structure - * @node_id: numa node to allocate on - * - * Allocate and pre-initialize a gendisk structure for use with BIO based - * drivers. - * - * Context: can sleep - */ -#define blk_alloc_disk(node_id) \ -({ \ - static struct lock_class_key __key; \ - \ - __blk_alloc_disk(node_id, &__key); \ -}) -void blk_cleanup_disk(struct gendisk *disk); - -int __register_blkdev(unsigned int major, const char *name, - void (*probe)(dev_t devt)); -#define register_blkdev(major, name) \ - __register_blkdev(major, name, NULL) -void unregister_blkdev(unsigned int major, const char *name); - -bool bdev_check_media_change(struct block_device *bdev); -int __invalidate_device(struct block_device *bdev, bool kill_dirty); -void set_capacity(struct gendisk *disk, sector_t size); - -#ifdef CONFIG_BLOCK_HOLDER_DEPRECATED -int bd_link_disk_holder(struct block_device *bdev, struct gendisk *disk); -void bd_unlink_disk_holder(struct block_device *bdev, struct gendisk *disk); -int bd_register_pending_holders(struct gendisk *disk); -#else -static inline int bd_link_disk_holder(struct block_device *bdev, - struct gendisk *disk) -{ - return 0; -} -static inline void bd_unlink_disk_holder(struct block_device *bdev, - struct gendisk *disk) -{ -} -static inline int bd_register_pending_holders(struct gendisk *disk) -{ - return 0; -} -#endif /* CONFIG_BLOCK_HOLDER_DEPRECATED */ - -dev_t part_devt(struct gendisk *disk, u8 partno); -void inc_diskseq(struct gendisk *disk); -dev_t blk_lookup_devt(const char *name, int partno); -void blk_request_module(dev_t devt); -#ifdef CONFIG_BLOCK -void printk_all_partitions(void); -#else /* CONFIG_BLOCK */ -static inline void printk_all_partitions(void) -{ -} -#endif /* CONFIG_BLOCK */ - -#endif /* _LINUX_GENHD_H */ diff --git a/include/linux/part_stat.h b/include/linux/part_stat.h index 6f7949b2fd8d..abeba356bc3f 100644 --- a/include/linux/part_stat.h +++ b/include/linux/part_stat.h @@ -2,7 +2,7 @@ #ifndef _LINUX_PART_STAT_H #define _LINUX_PART_STAT_H -#include <linux/genhd.h> +#include <linux/blkdev.h> #include <asm/local.h> struct disk_stats { |