| Message ID | 20200427113153.31246-8-johannes.thumshirn@wdc.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | Introduce Zone Append for writing to zoned block devices | expand |
On 4/27/20 1:31 PM, Johannes Thumshirn wrote: > Factor sanity checks for zoned commands from sd_zbc_setup_zone_mgmt_cmnd(). > > This will help with the introduction of an emulated ZONE_APPEND command. > > Signed-off-by: Johannes Thumshirn <johannes.thumshirn@wdc.com> > Reviewed-by: Christoph Hellwig <hch@lst.de> > Reviewed-by: Bart Van Assche <bvanassche@acm.org> > --- > drivers/scsi/sd_zbc.c | 36 +++++++++++++++++++++++++----------- > 1 file changed, 25 insertions(+), 11 deletions(-) > > diff --git a/drivers/scsi/sd_zbc.c b/drivers/scsi/sd_zbc.c > index f45c22b09726..ee156fbf3780 100644 > --- a/drivers/scsi/sd_zbc.c > +++ b/drivers/scsi/sd_zbc.c > @@ -209,6 +209,26 @@ int sd_zbc_report_zones(struct gendisk *disk, sector_t sector, > return ret; > } > > +static blk_status_t sd_zbc_cmnd_checks(struct scsi_cmnd *cmd) > +{ > + struct request *rq = cmd->request; > + struct scsi_disk *sdkp = scsi_disk(rq->rq_disk); > + sector_t sector = blk_rq_pos(rq); > + > + if (!sd_is_zoned(sdkp)) > + /* Not a zoned device */ > + return BLK_STS_IOERR; > + > + if (sdkp->device->changed) > + return BLK_STS_IOERR; > + > + if (sector & (sd_zbc_zone_sectors(sdkp) - 1)) > + /* Unaligned request */ > + return BLK_STS_IOERR; > + > + return BLK_STS_OK; > +} > + > /** > * sd_zbc_setup_zone_mgmt_cmnd - Prepare a zone ZBC_OUT command. The operations > * can be RESET WRITE POINTER, OPEN, CLOSE or FINISH. > @@ -223,20 +243,14 @@ blk_status_t sd_zbc_setup_zone_mgmt_cmnd(struct scsi_cmnd *cmd, > unsigned char op, bool all) > { > struct request *rq = cmd->request; > - struct scsi_disk *sdkp = scsi_disk(rq->rq_disk); > sector_t sector = blk_rq_pos(rq); > + struct scsi_disk *sdkp = scsi_disk(rq->rq_disk); > sector_t block = sectors_to_logical(sdkp->device, sector); > + blk_status_t ret; > > - if (!sd_is_zoned(sdkp)) > - /* Not a zoned device */ > - return BLK_STS_IOERR; > - > - if (sdkp->device->changed) > - return BLK_STS_IOERR; > - > - if (sector & (sd_zbc_zone_sectors(sdkp) - 1)) > - /* Unaligned request */ > - return BLK_STS_IOERR; > + ret = sd_zbc_cmnd_checks(cmd); > + if (ret != BLK_STS_OK) > + return ret; > > cmd->cmd_len = 16; > memset(cmd->cmnd, 0, cmd->cmd_len); > Reviewed-by: Hannes Reinecke <hare@suse.de> Cheers, Hannes
diff --git a/drivers/scsi/sd_zbc.c b/drivers/scsi/sd_zbc.c index f45c22b09726..ee156fbf3780 100644 --- a/drivers/scsi/sd_zbc.c +++ b/drivers/scsi/sd_zbc.c @@ -209,6 +209,26 @@ int sd_zbc_report_zones(struct gendisk *disk, sector_t sector, return ret; } +static blk_status_t sd_zbc_cmnd_checks(struct scsi_cmnd *cmd) +{ + struct request *rq = cmd->request; + struct scsi_disk *sdkp = scsi_disk(rq->rq_disk); + sector_t sector = blk_rq_pos(rq); + + if (!sd_is_zoned(sdkp)) + /* Not a zoned device */ + return BLK_STS_IOERR; + + if (sdkp->device->changed) + return BLK_STS_IOERR; + + if (sector & (sd_zbc_zone_sectors(sdkp) - 1)) + /* Unaligned request */ + return BLK_STS_IOERR; + + return BLK_STS_OK; +} + /** * sd_zbc_setup_zone_mgmt_cmnd - Prepare a zone ZBC_OUT command. The operations * can be RESET WRITE POINTER, OPEN, CLOSE or FINISH. @@ -223,20 +243,14 @@ blk_status_t sd_zbc_setup_zone_mgmt_cmnd(struct scsi_cmnd *cmd, unsigned char op, bool all) { struct request *rq = cmd->request; - struct scsi_disk *sdkp = scsi_disk(rq->rq_disk); sector_t sector = blk_rq_pos(rq); + struct scsi_disk *sdkp = scsi_disk(rq->rq_disk); sector_t block = sectors_to_logical(sdkp->device, sector); + blk_status_t ret; - if (!sd_is_zoned(sdkp)) - /* Not a zoned device */ - return BLK_STS_IOERR; - - if (sdkp->device->changed) - return BLK_STS_IOERR; - - if (sector & (sd_zbc_zone_sectors(sdkp) - 1)) - /* Unaligned request */ - return BLK_STS_IOERR; + ret = sd_zbc_cmnd_checks(cmd); + if (ret != BLK_STS_OK) + return ret; cmd->cmd_len = 16; memset(cmd->cmnd, 0, cmd->cmd_len);