[PATCH 22/28] blkdev.h: move declarations to blkdev_types.h
From: Max Kellermann
Date: Wed Jan 31 2024 - 09:56:54 EST
By providing declarations in a lean header, we can reduce header
dependencies.
Signed-off-by: Max Kellermann <max.kellermann@xxxxxxxxx>
---
include/linux/blkdev.h | 444 +------------------------------
include/linux/blkdev_types.h | 461 +++++++++++++++++++++++++++++++++
include/linux/cdrom.h | 2 +-
include/linux/io_uring_types.h | 2 +-
io_uring/io_uring.c | 1 +
5 files changed, 465 insertions(+), 445 deletions(-)
create mode 100644 include/linux/blkdev_types.h
diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h
index bc108e5fcec0..c8b172c92004 100644
--- a/include/linux/blkdev.h
+++ b/include/linux/blkdev.h
@@ -5,11 +5,9 @@
#ifndef _LINUX_BLKDEV_H
#define _LINUX_BLKDEV_H
-#include <linux/types.h>
+#include <linux/blkdev_types.h>
#include <linux/fs.h> // for inode_unhashed()
#include <linux/blk_types.h>
-#include <linux/device_types.h>
-#include <linux/list.h>
#include <linux/minmax.h>
#include <linux/timer_types.h>
#include <linux/workqueue_types.h>
@@ -44,173 +42,6 @@ extern const struct device_type disk_type;
extern const struct device_type part_type;
extern struct class block_class;
-/*
- * Maximum number of blkcg policies allowed to be registered concurrently.
- * Defined here to simplify include dependency.
- */
-#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;
-};
-
-typedef unsigned int __bitwise blk_mode_t;
-
-/* open for reading */
-#define BLK_OPEN_READ ((__force blk_mode_t)(1 << 0))
-/* open for writing */
-#define BLK_OPEN_WRITE ((__force blk_mode_t)(1 << 1))
-/* open exclusively (vs other exclusive openers */
-#define BLK_OPEN_EXCL ((__force blk_mode_t)(1 << 2))
-/* opened with O_NDELAY */
-#define BLK_OPEN_NDELAY ((__force blk_mode_t)(1 << 3))
-/* open for "writes" only for ioctls (specialy hack for floppy.c) */
-#define BLK_OPEN_WRITE_IOCTL ((__force blk_mode_t)(1 << 4))
-/* open is exclusive wrt all other BLK_OPEN_WRITE opens to the device */
-#define BLK_OPEN_RESTRICT_WRITES ((__force blk_mode_t)(1 << 5))
-
-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;
-
- struct bio_set bio_split;
-
- 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
-#define GD_ADDED 4
-#define GD_SUPPRESS_PART_SCAN 5
-#define GD_OWNS_QUEUE 6
-
- struct mutex open_mutex; /* open/close mutex */
- unsigned open_partitions; /* number of open partitions */
-
- struct backing_dev_info *bdi;
- struct kobject queue_kobj; /* the queue/ directory */
- 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_ZONED
- /*
- * Zoned block device information for request dispatch control.
- * nr_zones is the total number of zones of the device. This is always
- * 0 for regular block devices. conv_zones_bitmap is a bitmap of nr_zones
- * bits which indicates if a zone is conventional (bit set) or
- * sequential (bit clear). seq_zones_wlock is a bitmap of nr_zones
- * bits which indicates if a zone is write locked, that is, if a write
- * request targeting the zone was dispatched.
- *
- * Reads of this information must be protected with blk_queue_enter() /
- * blk_queue_exit(). Modifying this information is only allowed while
- * no requests are being processed. See also blk_mq_freeze_queue() and
- * blk_mq_unfreeze_queue().
- */
- unsigned int nr_zones;
- unsigned int max_open_zones;
- unsigned int max_active_zones;
- unsigned long *conv_zones_bitmap;
- unsigned long *seq_zones_wlock;
-#endif /* CONFIG_BLK_DEV_ZONED */
-
-#if IS_ENABLED(CONFIG_CDROM)
- struct cdrom_device_info *cdi;
-#endif
- int node_id;
- struct badblocks *bb;
- struct lockdep_map lockdep_map;
- u64 diskseq;
- blk_mode_t open_mode;
-
- /*
- * Independent sector access ranges. This is always NULL for
- * devices that do not have multiple independent access ranges.
- */
- struct blk_independent_access_ranges *ia_ranges;
-};
-
static inline bool disk_live(struct gendisk *disk)
{
return !inode_unhashed(disk->part0->bd_inode);
@@ -259,57 +90,6 @@ static inline int blk_validate_block_size(unsigned long bsize)
return 0;
}
-/*
- * BLK_BOUNCE_NONE: never bounce (default)
- * BLK_BOUNCE_HIGH: bounce all highmem pages
- */
-enum blk_bounce {
- BLK_BOUNCE_NONE,
- BLK_BOUNCE_HIGH,
-};
-
-struct queue_limits {
- enum blk_bounce bounce;
- unsigned long seg_boundary_mask;
- unsigned long virt_boundary_mask;
-
- unsigned int max_hw_sectors;
- unsigned int max_dev_sectors;
- unsigned int chunk_sectors;
- unsigned int max_sectors;
- unsigned int max_user_sectors;
- unsigned int max_segment_size;
- unsigned int physical_block_size;
- unsigned int logical_block_size;
- unsigned int alignment_offset;
- unsigned int io_min;
- unsigned int io_opt;
- unsigned int max_discard_sectors;
- unsigned int max_hw_discard_sectors;
- unsigned int max_secure_erase_sectors;
- unsigned int max_write_zeroes_sectors;
- unsigned int max_zone_append_sectors;
- unsigned int discard_granularity;
- unsigned int discard_alignment;
- unsigned int zone_write_granularity;
-
- unsigned short max_segments;
- unsigned short max_integrity_segments;
- unsigned short max_discard_segments;
-
- unsigned char misaligned;
- unsigned char discard_misaligned;
- unsigned char raid_partial_stripes_expensive;
- bool zoned;
-
- /*
- * Drivers that set dma_alignment to less than 511 must be prepared to
- * handle individual bvec's that are not a multiple of a SECTOR_SIZE
- * due to possible offsets.
- */
- unsigned int dma_alignment;
-};
-
typedef int (*report_zones_cb)(struct blk_zone *zone, unsigned int idx,
void *data);
@@ -350,194 +130,6 @@ struct blk_independent_access_ranges {
struct blk_independent_access_range ia_range[];
};
-struct request_queue {
- /*
- * The queue owner gets to use this for whatever they like.
- * ll_rw_blk doesn't touch it.
- */
- void *queuedata;
-
- struct elevator_queue *elevator;
-
- const struct blk_mq_ops *mq_ops;
-
- /* sw queues */
- struct blk_mq_ctx __percpu *queue_ctx;
-
- /*
- * various queue flags, see QUEUE_* below
- */
- unsigned long queue_flags;
-
- unsigned int rq_timeout;
-
- unsigned int queue_depth;
-
- refcount_t refs;
-
- /* hw dispatch queues */
- unsigned int nr_hw_queues;
- struct xarray hctx_table;
-
- struct percpu_ref q_usage_counter;
-
- struct request *last_merge;
-
- spinlock_t queue_lock;
-
- int quiesce_depth;
-
- struct gendisk *disk;
-
- /*
- * mq queue kobject
- */
- struct kobject *mq_kobj;
-
- struct queue_limits limits;
-
-#ifdef CONFIG_BLK_DEV_INTEGRITY
- struct blk_integrity integrity;
-#endif /* CONFIG_BLK_DEV_INTEGRITY */
-
-#ifdef CONFIG_PM
- struct device *dev;
- enum rpm_status rpm_status;
-#endif
-
- /*
- * Number of contexts that have called blk_set_pm_only(). If this
- * counter is above zero then only RQF_PM requests are processed.
- */
- atomic_t pm_only;
-
- struct blk_queue_stats *stats;
- struct rq_qos *rq_qos;
- struct mutex rq_qos_mutex;
-
- /*
- * ida allocated id for this queue. Used to index queues from
- * ioctx.
- */
- int id;
-
- unsigned int dma_pad_mask;
-
- /*
- * queue settings
- */
- unsigned long nr_requests; /* Max # of requests */
-
-#ifdef CONFIG_BLK_INLINE_ENCRYPTION
- struct blk_crypto_profile *crypto_profile;
- struct kobject *crypto_kobject;
-#endif
-
- struct timer_list timeout;
- struct work_struct timeout_work;
-
- atomic_t nr_active_requests_shared_tags;
-
- unsigned int required_elevator_features;
-
- struct blk_mq_tags *sched_shared_tags;
-
- struct list_head icq_list;
-#ifdef CONFIG_BLK_CGROUP
- DECLARE_BITMAP (blkcg_pols, BLKCG_MAX_POLS);
- struct blkcg_gq *root_blkg;
- struct list_head blkg_list;
- struct mutex blkcg_mutex;
-#endif
-
- int node;
-
- spinlock_t requeue_lock;
- struct list_head requeue_list;
- struct delayed_work requeue_work;
-
-#ifdef CONFIG_BLK_DEV_IO_TRACE
- struct blk_trace __rcu *blk_trace;
-#endif
- /*
- * for flush operations
- */
- struct blk_flush_queue *fq;
- struct list_head flush_list;
-
- struct mutex sysfs_lock;
- struct mutex sysfs_dir_lock;
-
- /*
- * for reusing dead hctx instance in case of updating
- * nr_hw_queues
- */
- struct list_head unused_hctx_list;
- spinlock_t unused_hctx_lock;
-
- int mq_freeze_depth;
-
-#ifdef CONFIG_BLK_DEV_THROTTLING
- /* Throttle data */
- struct throtl_data *td;
-#endif
- struct rcu_head rcu_head;
- wait_queue_head_t mq_freeze_wq;
- /*
- * Protect concurrent access to q_usage_counter by
- * percpu_ref_kill() and percpu_ref_reinit().
- */
- struct mutex mq_freeze_lock;
-
- struct blk_mq_tag_set *tag_set;
- struct list_head tag_set_list;
-
- struct dentry *debugfs_dir;
- struct dentry *sched_debugfs_dir;
- struct dentry *rqos_debugfs_dir;
- /*
- * Serializes all debugfs metadata operations using the above dentries.
- */
- struct mutex debugfs_mutex;
-
- bool mq_sysfs_init_done;
-};
-
-/* Keep blk_queue_flag_name[] in sync with the definitions below */
-#define QUEUE_FLAG_STOPPED 0 /* queue is stopped */
-#define QUEUE_FLAG_DYING 1 /* queue being torn down */
-#define QUEUE_FLAG_NOMERGES 3 /* disable merge attempts */
-#define QUEUE_FLAG_SAME_COMP 4 /* complete on same CPU-group */
-#define QUEUE_FLAG_FAIL_IO 5 /* fake timeout */
-#define QUEUE_FLAG_NONROT 6 /* non-rotational device (SSD) */
-#define QUEUE_FLAG_VIRT QUEUE_FLAG_NONROT /* paravirt device */
-#define QUEUE_FLAG_IO_STAT 7 /* do disk/partitions IO accounting */
-#define QUEUE_FLAG_NOXMERGES 9 /* No extended merges */
-#define QUEUE_FLAG_ADD_RANDOM 10 /* Contributes to random pool */
-#define QUEUE_FLAG_SYNCHRONOUS 11 /* always completes in submit context */
-#define QUEUE_FLAG_SAME_FORCE 12 /* force complete on same CPU */
-#define QUEUE_FLAG_HW_WC 13 /* Write back caching supported */
-#define QUEUE_FLAG_INIT_DONE 14 /* queue is initialized */
-#define QUEUE_FLAG_STABLE_WRITES 15 /* don't modify blks until WB is done */
-#define QUEUE_FLAG_POLL 16 /* IO polling enabled if set */
-#define QUEUE_FLAG_WC 17 /* Write back caching */
-#define QUEUE_FLAG_FUA 18 /* device supports FUA writes */
-#define QUEUE_FLAG_DAX 19 /* device supports DAX */
-#define QUEUE_FLAG_STATS 20 /* track IO start and completion times */
-#define QUEUE_FLAG_REGISTERED 22 /* queue has been registered to a disk */
-#define QUEUE_FLAG_QUIESCED 24 /* queue has been quiesced */
-#define QUEUE_FLAG_PCI_P2PDMA 25 /* device supports PCI p2p requests */
-#define QUEUE_FLAG_ZONE_RESETALL 26 /* supports Zone Reset All */
-#define QUEUE_FLAG_RQ_ALLOC_TIME 27 /* record rq->alloc_time_ns */
-#define QUEUE_FLAG_HCTX_ACTIVE 28 /* at least one blk-mq hctx is active */
-#define QUEUE_FLAG_NOWAIT 29 /* device supports NOWAIT */
-#define QUEUE_FLAG_SQ_SCHED 30 /* single queue style io dispatch */
-#define QUEUE_FLAG_SKIP_TAGSET_QUIESCE 31 /* quiesce_tagset skip the queue*/
-
-#define QUEUE_FLAG_MQ_DEFAULT ((1UL << QUEUE_FLAG_IO_STAT) | \
- (1UL << QUEUE_FLAG_SAME_COMP) | \
- (1UL << QUEUE_FLAG_NOWAIT))
-
void blk_queue_flag_set(unsigned int flag, struct request_queue *q);
void blk_queue_flag_clear(unsigned int flag, struct request_queue *q);
bool blk_queue_flag_test_and_set(unsigned int flag, struct request_queue *q);
@@ -920,32 +512,6 @@ extern void blk_put_queue(struct request_queue *);
void blk_mark_disk_dead(struct gendisk *disk);
#ifdef CONFIG_BLOCK
-/*
- * blk_plug permits building a queue of related requests by holding the I/O
- * fragments for a short period. This allows merging of sequential requests
- * into single larger request. As the requests are moved from a per-task list to
- * the device's request_queue in a batch, this results in improved scalability
- * as the lock contention for request_queue lock is reduced.
- *
- * It is ok not to disable preemption when adding the request to the plug list
- * or when attempting a merge. For details, please see schedule() where
- * blk_flush_plug() is called.
- */
-struct blk_plug {
- struct request *mq_list; /* blk-mq requests */
-
- /* if ios_left is > 1, we can batch tag/rq allocations */
- struct request *cached_rq;
- u64 cur_ktime;
- unsigned short nr_ios;
-
- unsigned short rq_count;
-
- bool multiple_queues;
- bool has_elevator;
-
- struct list_head cb_list; /* md requires an unplug callback */
-};
struct blk_plug_cb;
typedef void (*blk_plug_cb_fn)(struct blk_plug_cb *, bool);
@@ -982,8 +548,6 @@ static inline void blk_plug_invalidate_ts(struct task_struct *tsk)
int blkdev_issue_flush(struct block_device *bdev);
long nr_blockdev_pages(void);
#else /* CONFIG_BLOCK */
-struct blk_plug {
-};
static inline void blk_start_plug_nr_ios(struct blk_plug *plug,
unsigned short nr_ios)
@@ -1545,12 +1109,6 @@ static inline int early_lookup_bdev(const char *pathname, dev_t *dev)
int bdev_freeze(struct block_device *bdev);
int bdev_thaw(struct block_device *bdev);
-struct io_comp_batch {
- struct request *req_list;
- bool need_ts;
- void (*complete)(struct io_comp_batch *);
-};
-
#define DEFINE_IO_COMP_BATCH(name) struct io_comp_batch name = { }
#endif /* _LINUX_BLKDEV_H */
diff --git a/include/linux/blkdev_types.h b/include/linux/blkdev_types.h
new file mode 100644
index 000000000000..35a1dcf98bf6
--- /dev/null
+++ b/include/linux/blkdev_types.h
@@ -0,0 +1,461 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef _LINUX_BLKDEV_TYPES_H
+#define _LINUX_BLKDEV_TYPES_H
+
+#include <linux/bio_types.h>
+#include <linux/list.h>
+#include <linux/kobject_types.h>
+#include <linux/percpu-refcount_types.h>
+#include <linux/pm.h>
+#include <linux/uuid.h>
+#include <linux/xarray_types.h>
+
+/*
+ * Maximum number of blkcg policies allowed to be registered concurrently.
+ * Defined here to simplify include dependency.
+ */
+#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;
+};
+
+typedef unsigned int __bitwise blk_mode_t;
+
+/* open for reading */
+#define BLK_OPEN_READ ((__force blk_mode_t)(1 << 0))
+/* open for writing */
+#define BLK_OPEN_WRITE ((__force blk_mode_t)(1 << 1))
+/* open exclusively (vs other exclusive openers */
+#define BLK_OPEN_EXCL ((__force blk_mode_t)(1 << 2))
+/* opened with O_NDELAY */
+#define BLK_OPEN_NDELAY ((__force blk_mode_t)(1 << 3))
+/* open for "writes" only for ioctls (specialy hack for floppy.c) */
+#define BLK_OPEN_WRITE_IOCTL ((__force blk_mode_t)(1 << 4))
+/* open is exclusive wrt all other BLK_OPEN_WRITE opens to the device */
+#define BLK_OPEN_RESTRICT_WRITES ((__force blk_mode_t)(1 << 5))
+
+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;
+
+ struct bio_set bio_split;
+
+ 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
+#define GD_ADDED 4
+#define GD_SUPPRESS_PART_SCAN 5
+#define GD_OWNS_QUEUE 6
+
+ struct mutex open_mutex; /* open/close mutex */
+ unsigned open_partitions; /* number of open partitions */
+
+ struct backing_dev_info *bdi;
+ struct kobject queue_kobj; /* the queue/ directory */
+ 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_ZONED
+ /*
+ * Zoned block device information for request dispatch control.
+ * nr_zones is the total number of zones of the device. This is always
+ * 0 for regular block devices. conv_zones_bitmap is a bitmap of nr_zones
+ * bits which indicates if a zone is conventional (bit set) or
+ * sequential (bit clear). seq_zones_wlock is a bitmap of nr_zones
+ * bits which indicates if a zone is write locked, that is, if a write
+ * request targeting the zone was dispatched.
+ *
+ * Reads of this information must be protected with blk_queue_enter() /
+ * blk_queue_exit(). Modifying this information is only allowed while
+ * no requests are being processed. See also blk_mq_freeze_queue() and
+ * blk_mq_unfreeze_queue().
+ */
+ unsigned int nr_zones;
+ unsigned int max_open_zones;
+ unsigned int max_active_zones;
+ unsigned long *conv_zones_bitmap;
+ unsigned long *seq_zones_wlock;
+#endif /* CONFIG_BLK_DEV_ZONED */
+
+#if IS_ENABLED(CONFIG_CDROM)
+ struct cdrom_device_info *cdi;
+#endif
+ int node_id;
+ struct badblocks *bb;
+ struct lockdep_map lockdep_map;
+ u64 diskseq;
+ blk_mode_t open_mode;
+
+ /*
+ * Independent sector access ranges. This is always NULL for
+ * devices that do not have multiple independent access ranges.
+ */
+ struct blk_independent_access_ranges *ia_ranges;
+};
+
+/*
+ * BLK_BOUNCE_NONE: never bounce (default)
+ * BLK_BOUNCE_HIGH: bounce all highmem pages
+ */
+enum blk_bounce {
+ BLK_BOUNCE_NONE,
+ BLK_BOUNCE_HIGH,
+};
+
+struct queue_limits {
+ enum blk_bounce bounce;
+ unsigned long seg_boundary_mask;
+ unsigned long virt_boundary_mask;
+
+ unsigned int max_hw_sectors;
+ unsigned int max_dev_sectors;
+ unsigned int chunk_sectors;
+ unsigned int max_sectors;
+ unsigned int max_user_sectors;
+ unsigned int max_segment_size;
+ unsigned int physical_block_size;
+ unsigned int logical_block_size;
+ unsigned int alignment_offset;
+ unsigned int io_min;
+ unsigned int io_opt;
+ unsigned int max_discard_sectors;
+ unsigned int max_hw_discard_sectors;
+ unsigned int max_secure_erase_sectors;
+ unsigned int max_write_zeroes_sectors;
+ unsigned int max_zone_append_sectors;
+ unsigned int discard_granularity;
+ unsigned int discard_alignment;
+ unsigned int zone_write_granularity;
+
+ unsigned short max_segments;
+ unsigned short max_integrity_segments;
+ unsigned short max_discard_segments;
+
+ unsigned char misaligned;
+ unsigned char discard_misaligned;
+ unsigned char raid_partial_stripes_expensive;
+ bool zoned;
+
+ /*
+ * Drivers that set dma_alignment to less than 511 must be prepared to
+ * handle individual bvec's that are not a multiple of a SECTOR_SIZE
+ * due to possible offsets.
+ */
+ unsigned int dma_alignment;
+};
+
+struct request_queue {
+ /*
+ * The queue owner gets to use this for whatever they like.
+ * ll_rw_blk doesn't touch it.
+ */
+ void *queuedata;
+
+ struct elevator_queue *elevator;
+
+ const struct blk_mq_ops *mq_ops;
+
+ /* sw queues */
+ struct blk_mq_ctx __percpu *queue_ctx;
+
+ /*
+ * various queue flags, see QUEUE_* below
+ */
+ unsigned long queue_flags;
+
+ unsigned int rq_timeout;
+
+ unsigned int queue_depth;
+
+ refcount_t refs;
+
+ /* hw dispatch queues */
+ unsigned int nr_hw_queues;
+ struct xarray hctx_table;
+
+ struct percpu_ref q_usage_counter;
+
+ struct request *last_merge;
+
+ spinlock_t queue_lock;
+
+ int quiesce_depth;
+
+ struct gendisk *disk;
+
+ /*
+ * mq queue kobject
+ */
+ struct kobject *mq_kobj;
+
+ struct queue_limits limits;
+
+#ifdef CONFIG_BLK_DEV_INTEGRITY
+ struct blk_integrity integrity;
+#endif /* CONFIG_BLK_DEV_INTEGRITY */
+
+#ifdef CONFIG_PM
+ struct device *dev;
+ enum rpm_status rpm_status;
+#endif
+
+ /*
+ * Number of contexts that have called blk_set_pm_only(). If this
+ * counter is above zero then only RQF_PM requests are processed.
+ */
+ atomic_t pm_only;
+
+ struct blk_queue_stats *stats;
+ struct rq_qos *rq_qos;
+ struct mutex rq_qos_mutex;
+
+ /*
+ * ida allocated id for this queue. Used to index queues from
+ * ioctx.
+ */
+ int id;
+
+ unsigned int dma_pad_mask;
+
+ /*
+ * queue settings
+ */
+ unsigned long nr_requests; /* Max # of requests */
+
+#ifdef CONFIG_BLK_INLINE_ENCRYPTION
+ struct blk_crypto_profile *crypto_profile;
+ struct kobject *crypto_kobject;
+#endif
+
+ struct timer_list timeout;
+ struct work_struct timeout_work;
+
+ atomic_t nr_active_requests_shared_tags;
+
+ unsigned int required_elevator_features;
+
+ struct blk_mq_tags *sched_shared_tags;
+
+ struct list_head icq_list;
+#ifdef CONFIG_BLK_CGROUP
+ DECLARE_BITMAP (blkcg_pols, BLKCG_MAX_POLS);
+ struct blkcg_gq *root_blkg;
+ struct list_head blkg_list;
+ struct mutex blkcg_mutex;
+#endif
+
+ int node;
+
+ spinlock_t requeue_lock;
+ struct list_head requeue_list;
+ struct delayed_work requeue_work;
+
+#ifdef CONFIG_BLK_DEV_IO_TRACE
+ struct blk_trace __rcu *blk_trace;
+#endif
+ /*
+ * for flush operations
+ */
+ struct blk_flush_queue *fq;
+ struct list_head flush_list;
+
+ struct mutex sysfs_lock;
+ struct mutex sysfs_dir_lock;
+
+ /*
+ * for reusing dead hctx instance in case of updating
+ * nr_hw_queues
+ */
+ struct list_head unused_hctx_list;
+ spinlock_t unused_hctx_lock;
+
+ int mq_freeze_depth;
+
+#ifdef CONFIG_BLK_DEV_THROTTLING
+ /* Throttle data */
+ struct throtl_data *td;
+#endif
+ struct rcu_head rcu_head;
+ wait_queue_head_t mq_freeze_wq;
+ /*
+ * Protect concurrent access to q_usage_counter by
+ * percpu_ref_kill() and percpu_ref_reinit().
+ */
+ struct mutex mq_freeze_lock;
+
+ struct blk_mq_tag_set *tag_set;
+ struct list_head tag_set_list;
+
+ struct dentry *debugfs_dir;
+ struct dentry *sched_debugfs_dir;
+ struct dentry *rqos_debugfs_dir;
+ /*
+ * Serializes all debugfs metadata operations using the above dentries.
+ */
+ struct mutex debugfs_mutex;
+
+ bool mq_sysfs_init_done;
+};
+
+/* Keep blk_queue_flag_name[] in sync with the definitions below */
+#define QUEUE_FLAG_STOPPED 0 /* queue is stopped */
+#define QUEUE_FLAG_DYING 1 /* queue being torn down */
+#define QUEUE_FLAG_NOMERGES 3 /* disable merge attempts */
+#define QUEUE_FLAG_SAME_COMP 4 /* complete on same CPU-group */
+#define QUEUE_FLAG_FAIL_IO 5 /* fake timeout */
+#define QUEUE_FLAG_NONROT 6 /* non-rotational device (SSD) */
+#define QUEUE_FLAG_VIRT QUEUE_FLAG_NONROT /* paravirt device */
+#define QUEUE_FLAG_IO_STAT 7 /* do disk/partitions IO accounting */
+#define QUEUE_FLAG_NOXMERGES 9 /* No extended merges */
+#define QUEUE_FLAG_ADD_RANDOM 10 /* Contributes to random pool */
+#define QUEUE_FLAG_SYNCHRONOUS 11 /* always completes in submit context */
+#define QUEUE_FLAG_SAME_FORCE 12 /* force complete on same CPU */
+#define QUEUE_FLAG_HW_WC 13 /* Write back caching supported */
+#define QUEUE_FLAG_INIT_DONE 14 /* queue is initialized */
+#define QUEUE_FLAG_STABLE_WRITES 15 /* don't modify blks until WB is done */
+#define QUEUE_FLAG_POLL 16 /* IO polling enabled if set */
+#define QUEUE_FLAG_WC 17 /* Write back caching */
+#define QUEUE_FLAG_FUA 18 /* device supports FUA writes */
+#define QUEUE_FLAG_DAX 19 /* device supports DAX */
+#define QUEUE_FLAG_STATS 20 /* track IO start and completion times */
+#define QUEUE_FLAG_REGISTERED 22 /* queue has been registered to a disk */
+#define QUEUE_FLAG_QUIESCED 24 /* queue has been quiesced */
+#define QUEUE_FLAG_PCI_P2PDMA 25 /* device supports PCI p2p requests */
+#define QUEUE_FLAG_ZONE_RESETALL 26 /* supports Zone Reset All */
+#define QUEUE_FLAG_RQ_ALLOC_TIME 27 /* record rq->alloc_time_ns */
+#define QUEUE_FLAG_HCTX_ACTIVE 28 /* at least one blk-mq hctx is active */
+#define QUEUE_FLAG_NOWAIT 29 /* device supports NOWAIT */
+#define QUEUE_FLAG_SQ_SCHED 30 /* single queue style io dispatch */
+#define QUEUE_FLAG_SKIP_TAGSET_QUIESCE 31 /* quiesce_tagset skip the queue*/
+
+#define QUEUE_FLAG_MQ_DEFAULT ((1UL << QUEUE_FLAG_IO_STAT) | \
+ (1UL << QUEUE_FLAG_SAME_COMP) | \
+ (1UL << QUEUE_FLAG_NOWAIT))
+
+#ifdef CONFIG_BLOCK
+
+/*
+ * blk_plug permits building a queue of related requests by holding the I/O
+ * fragments for a short period. This allows merging of sequential requests
+ * into single larger request. As the requests are moved from a per-task list to
+ * the device's request_queue in a batch, this results in improved scalability
+ * as the lock contention for request_queue lock is reduced.
+ *
+ * It is ok not to disable preemption when adding the request to the plug list
+ * or when attempting a merge. For details, please see schedule() where
+ * blk_flush_plug() is called.
+ */
+struct blk_plug {
+ struct request *mq_list; /* blk-mq requests */
+
+ /* if ios_left is > 1, we can batch tag/rq allocations */
+ struct request *cached_rq;
+ u64 cur_ktime;
+ unsigned short nr_ios;
+
+ unsigned short rq_count;
+
+ bool multiple_queues;
+ bool has_elevator;
+
+ struct list_head cb_list; /* md requires an unplug callback */
+};
+
+#else /* CONFIG_BLOCK */
+
+struct blk_plug {
+};
+
+#endif /* CONFIG_BLOCK */
+
+struct io_comp_batch {
+ struct request *req_list;
+ bool need_ts;
+ void (*complete)(struct io_comp_batch *);
+};
+
+#endif /* _LINUX_BLKDEV_TYPES_H */
diff --git a/include/linux/cdrom.h b/include/linux/cdrom.h
index 98c6fd0b39b6..d99709e14ecb 100644
--- a/include/linux/cdrom.h
+++ b/include/linux/cdrom.h
@@ -13,7 +13,7 @@
#include <linux/fs.h> /* not really needed, later.. */
#include <linux/list.h>
-#include <linux/blkdev.h>
+#include <linux/blkdev_types.h>
#include <scsi/scsi_common.h>
#include <uapi/linux/cdrom.h>
diff --git a/include/linux/io_uring_types.h b/include/linux/io_uring_types.h
index 854ad67a5f70..fd9e5bafdf85 100644
--- a/include/linux/io_uring_types.h
+++ b/include/linux/io_uring_types.h
@@ -1,7 +1,7 @@
#ifndef IO_URING_TYPES_H
#define IO_URING_TYPES_H
-#include <linux/blkdev.h>
+#include <linux/blkdev_types.h>
#include <linux/task_work.h>
#include <linux/bitmap.h>
#include <linux/llist.h>
diff --git a/io_uring/io_uring.c b/io_uring/io_uring.c
index 49db7fa2cebd..264c295b503c 100644
--- a/io_uring/io_uring.c
+++ b/io_uring/io_uring.c
@@ -47,6 +47,7 @@
#include <linux/refcount.h>
#include <linux/uio.h>
#include <linux/bits.h>
+#include <linux/blkdev.h>
#include <linux/sched/signal.h>
#include <linux/fs.h>
--
2.39.2