[PATCH v2 06/11] scsi: sd_zbc: factor out sanity checks for zoned commands
From: Johannes Thumshirn <hidden>
Date: 2020-03-24 15:25:15
Also in:
linux-fsdevel, linux-scsi
Subsystem:
scsi subsystem, the rest · Maintainers:
"James E.J. Bottomley", "Martin K. Petersen", Linus Torvalds
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 <redacted> --- 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);
--
2.24.1