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| author | Matias Bjørling <matias.bjorling@wdc.com> | 2018-07-06 20:38:39 +0300 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2018-07-09 18:07:55 +0300 |
| commit | ca4b2a011948fae4e4d31490107db4926385a983 (patch) | |
| tree | 4fb64aaae7642ec180fae7d9afd16ccd2c09b881 /drivers/block/null_blk.h | |
| parent | 6dad38d38f20c0c8a84b5ae4f23c62b2c8758ec5 (diff) | |
| download | linux-ca4b2a011948fae4e4d31490107db4926385a983.tar.xz | |
null_blk: add zone support
Adds support for exposing a null_blk device through the zone device
interface.
The interface is managed with the parameters zoned and zone_size.
If zoned is set, the null_blk instance registers as a zoned block
device. The zone_size parameter defines how big each zone will be.
Signed-off-by: Matias Bjørling <matias.bjorling@wdc.com>
Signed-off-by: Bart Van Assche <bart.vanassche@wdc.com>
Signed-off-by: Damien Le Moal <damien.lemoal@wdc.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'drivers/block/null_blk.h')
| -rw-r--r-- | drivers/block/null_blk.h | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/drivers/block/null_blk.h b/drivers/block/null_blk.h index d82c5501806d..d81781f22dba 100644 --- a/drivers/block/null_blk.h +++ b/drivers/block/null_blk.h @@ -41,9 +41,14 @@ struct nullb_device { unsigned int curr_cache; struct badblocks badblocks; + unsigned int nr_zones; + struct blk_zone *zones; + sector_t zone_size_sects; + 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 long zone_size; /* zone size in MB if device is zoned */ unsigned int submit_queues; /* number of submission queues */ unsigned int home_node; /* home node for the device */ unsigned int queue_mode; /* block interface */ @@ -57,6 +62,7 @@ struct nullb_device { bool power; /* power on/off the device */ bool memory_backed; /* if data is stored in memory */ bool discard; /* if support discard */ + bool zoned; /* if device is zoned */ }; struct nullb { @@ -77,4 +83,26 @@ struct nullb { unsigned int nr_queues; char disk_name[DISK_NAME_LEN]; }; + +#ifdef CONFIG_BLK_DEV_ZONED +int null_zone_init(struct nullb_device *dev); +void null_zone_exit(struct nullb_device *dev); +blk_status_t null_zone_report(struct nullb *nullb, + struct nullb_cmd *cmd); +void null_zone_write(struct nullb_cmd *cmd); +void null_zone_reset(struct nullb_cmd *cmd); +#else +static inline int null_zone_init(struct nullb_device *dev) +{ + return -EINVAL; +} +static inline void null_zone_exit(struct nullb_device *dev) {} +static inline blk_status_t null_zone_report(struct nullb *nullb, + struct nullb_cmd *cmd) +{ + return BLK_STS_NOTSUPP; +} +static inline void null_zone_write(struct nullb_cmd *cmd) {} +static inline void null_zone_reset(struct nullb_cmd *cmd) {} +#endif /* CONFIG_BLK_DEV_ZONED */ #endif /* __NULL_BLK_H */ |