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| author |   Christoph Hellwig <hch@lst.de> | 2018-10-12 19:08:49 +0900 |
|---|---|---|
| committer |   Jens Axboe <axboe@kernel.dk> | 2018-10-25 11:17:40 -0600 |
| commit | e76239a3748c90a8b0e197f8f4544a8ce52f126e (patch) | |
| tree | 4e555b7fe24f1642eecc1cfbca563897cfeb6d4a /drivers/scsi/sd.h | |
| parent | block: Expose queue nr_zones in sysfs (diff) | |
| download | linux-dev-e76239a3748c90a8b0e197f8f4544a8ce52f126e.tar.xz linux-dev-e76239a3748c90a8b0e197f8f4544a8ce52f126e.zip | |
block: add a report_zones method
Dispatching a report zones command through the request queue is a major
pain due to the command reply payload rewriting necessary. Given that
blkdev_report_zones() is executing everything synchronously, implement
report zones as a block device file operation instead, allowing major
simplification of the code in many places.
sd, null-blk, dm-linear and dm-flakey being the only block device
drivers supporting exposing zoned block devices, these drivers are
modified to provide the device side implementation of the
report_zones() block device file operation.
For device mappers, a new report_zones() target type operation is
defined so that the upper block layer calls blkdev_report_zones() can
be propagated down to the underlying devices of the dm targets.
Implementation for this new operation is added to the dm-linear and
dm-flakey targets.
Reviewed-by: Hannes Reinecke <hare@suse.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
[Damien]
* Changed method block_device argument to gendisk
* Various bug fixes and improvements
* Added support for null_blk, dm-linear and dm-flakey.
Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com>
Reviewed-by: Mike Snitzer <snitzer@redhat.com>
Signed-off-by: Damien Le Moal <damien.lemoal@wdc.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'drivers/scsi/sd.h')
| -rw-r--r-- | drivers/scsi/sd.h | 11 |
1 files changed, 5 insertions, 6 deletions
diff --git a/drivers/scsi/sd.h b/drivers/scsi/sd.h index a7d4f50b67d4..f72f20fd0d8b 100644 --- a/drivers/scsi/sd.h +++ b/drivers/scsi/sd.h @@ -273,10 +273,12 @@ static inline int sd_is_zoned(struct scsi_disk *sdkp) extern int sd_zbc_read_zones(struct scsi_disk *sdkp, unsigned char *buffer); extern void sd_zbc_remove(struct scsi_disk *sdkp); extern void sd_zbc_print_zones(struct scsi_disk *sdkp); -extern int sd_zbc_setup_report_cmnd(struct scsi_cmnd *cmd); extern int sd_zbc_setup_reset_cmnd(struct scsi_cmnd *cmd); extern void sd_zbc_complete(struct scsi_cmnd *cmd, unsigned int good_bytes, struct scsi_sense_hdr *sshdr); +extern int sd_zbc_report_zones(struct gendisk *disk, sector_t sector, + struct blk_zone *zones, unsigned int *nr_zones, + gfp_t gfp_mask); #else /* CONFIG_BLK_DEV_ZONED */ @@ -290,11 +292,6 @@ static inline void sd_zbc_remove(struct scsi_disk *sdkp) {} static inline void sd_zbc_print_zones(struct scsi_disk *sdkp) {} -static inline int sd_zbc_setup_report_cmnd(struct scsi_cmnd *cmd) -{ - return BLKPREP_INVALID; -} - static inline int sd_zbc_setup_reset_cmnd(struct scsi_cmnd *cmd) { return BLKPREP_INVALID; @@ -304,6 +301,8 @@ static inline void sd_zbc_complete(struct scsi_cmnd *cmd, unsigned int good_bytes, struct scsi_sense_hdr *sshdr) {} +#define sd_zbc_report_zones NULL + #endif /* CONFIG_BLK_DEV_ZONED */ #endif /* _SCSI_DISK_H */ |