From 6dad38d38f20c0c8a84b5ae4f23c62b2c8758ec5 Mon Sep 17 00:00:00 2001 From: =?utf8?q?Matias=20Bj=C3=B8rling?= Date: Fri, 6 Jul 2018 19:38:38 +0200 Subject: [PATCH] null_blk: move shared definitions to header file MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit Split the null_blk device driver, such that it can prepare for zoned block interface support. Signed-off-by: Matias Bjørling Signed-off-by: Jens Axboe --- drivers/block/null_blk.c | 76 +-------------------------------------------- drivers/block/null_blk.h | 80 ++++++++++++++++++++++++++++++++++++++++++++++++ 2 files changed, 81 insertions(+), 75 deletions(-) create mode 100644 drivers/block/null_blk.h diff --git a/drivers/block/null_blk.c b/drivers/block/null_blk.c index 8abfb10..47dd084 100644 --- a/drivers/block/null_blk.c +++ b/drivers/block/null_blk.c @@ -7,14 +7,8 @@ #include #include #include -#include #include -#include -#include -#include -#include -#include -#include +#include "null_blk.h" #define PAGE_SECTORS_SHIFT (PAGE_SHIFT - SECTOR_SHIFT) #define PAGE_SECTORS (1 << PAGE_SECTORS_SHIFT) @@ -35,28 +29,6 @@ static inline u64 mb_per_tick(int mbps) return (1 << 20) / TICKS_PER_SEC * ((u64) mbps); } -struct nullb_cmd { - struct list_head list; - struct llist_node ll_list; - struct __call_single_data csd; - struct request *rq; - struct bio *bio; - unsigned int tag; - blk_status_t error; - struct nullb_queue *nq; - struct hrtimer timer; -}; - -struct nullb_queue { - unsigned long *tag_map; - wait_queue_head_t wait; - unsigned int queue_depth; - struct nullb_device *dev; - unsigned int requeue_selection; - - struct nullb_cmd *cmds; -}; - /* * Status flags for nullb_device. * @@ -92,52 +64,6 @@ struct nullb_page { #define NULLB_PAGE_LOCK (MAP_SZ - 1) #define NULLB_PAGE_FREE (MAP_SZ - 2) -struct nullb_device { - struct nullb *nullb; - struct config_item item; - struct radix_tree_root data; /* data stored in the disk */ - struct radix_tree_root cache; /* disk cache data */ - unsigned long flags; /* device flags */ - unsigned int curr_cache; - struct badblocks badblocks; - - unsigned long size; /* device size in MB */ - unsigned long completion_nsec; /* time in ns to complete a request */ - unsigned long cache_size; /* disk cache size in MB */ - unsigned int submit_queues; /* number of submission queues */ - unsigned int home_node; /* home node for the device */ - unsigned int queue_mode; /* block interface */ - unsigned int blocksize; /* block size */ - unsigned int irqmode; /* IRQ completion handler */ - unsigned int hw_queue_depth; /* queue depth */ - unsigned int index; /* index of the disk, only valid with a disk */ - unsigned int mbps; /* Bandwidth throttle cap (in MB/s) */ - bool blocking; /* blocking blk-mq device */ - bool use_per_node_hctx; /* use per-node allocation for hardware context */ - bool power; /* power on/off the device */ - bool memory_backed; /* if data is stored in memory */ - bool discard; /* if support discard */ -}; - -struct nullb { - struct nullb_device *dev; - struct list_head list; - unsigned int index; - struct request_queue *q; - struct gendisk *disk; - struct blk_mq_tag_set *tag_set; - struct blk_mq_tag_set __tag_set; - unsigned int queue_depth; - atomic_long_t cur_bytes; - struct hrtimer bw_timer; - unsigned long cache_flush_pos; - spinlock_t lock; - - struct nullb_queue *queues; - unsigned int nr_queues; - char disk_name[DISK_NAME_LEN]; -}; - static LIST_HEAD(nullb_list); static struct mutex lock; static int null_major; diff --git a/drivers/block/null_blk.h b/drivers/block/null_blk.h new file mode 100644 index 0000000..d82c550 --- /dev/null +++ b/drivers/block/null_blk.h @@ -0,0 +1,80 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#ifndef __BLK_NULL_BLK_H +#define __BLK_NULL_BLK_H + +#include +#include +#include +#include +#include +#include +#include + +struct nullb_cmd { + struct list_head list; + struct llist_node ll_list; + struct __call_single_data csd; + struct request *rq; + struct bio *bio; + unsigned int tag; + blk_status_t error; + struct nullb_queue *nq; + struct hrtimer timer; +}; + +struct nullb_queue { + unsigned long *tag_map; + wait_queue_head_t wait; + unsigned int queue_depth; + struct nullb_device *dev; + unsigned int requeue_selection; + + struct nullb_cmd *cmds; +}; + +struct nullb_device { + struct nullb *nullb; + struct config_item item; + struct radix_tree_root data; /* data stored in the disk */ + struct radix_tree_root cache; /* disk cache data */ + unsigned long flags; /* device flags */ + unsigned int curr_cache; + struct badblocks badblocks; + + unsigned long size; /* device size in MB */ + unsigned long completion_nsec; /* time in ns to complete a request */ + unsigned long cache_size; /* disk cache size in MB */ + unsigned int submit_queues; /* number of submission queues */ + unsigned int home_node; /* home node for the device */ + unsigned int queue_mode; /* block interface */ + unsigned int blocksize; /* block size */ + unsigned int irqmode; /* IRQ completion handler */ + unsigned int hw_queue_depth; /* queue depth */ + unsigned int index; /* index of the disk, only valid with a disk */ + unsigned int mbps; /* Bandwidth throttle cap (in MB/s) */ + bool blocking; /* blocking blk-mq device */ + bool use_per_node_hctx; /* use per-node allocation for hardware context */ + bool power; /* power on/off the device */ + bool memory_backed; /* if data is stored in memory */ + bool discard; /* if support discard */ +}; + +struct nullb { + struct nullb_device *dev; + struct list_head list; + unsigned int index; + struct request_queue *q; + struct gendisk *disk; + struct blk_mq_tag_set *tag_set; + struct blk_mq_tag_set __tag_set; + unsigned int queue_depth; + atomic_long_t cur_bytes; + struct hrtimer bw_timer; + unsigned long cache_flush_pos; + spinlock_t lock; + + struct nullb_queue *queues; + unsigned int nr_queues; + char disk_name[DISK_NAME_LEN]; +}; +#endif /* __NULL_BLK_H */ -- 2.7.4