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| author | Damien Le Moal <damien.lemoal@wdc.com> | 2020-04-22 13:42:20 +0300 |
|---|---|---|
| committer | Martin K. Petersen <martin.petersen@oracle.com> | 2020-05-05 07:37:33 +0300 |
| commit | 98e0a689868c26eb82650ee759073f2295e74c97 (patch) | |
| tree | 3d3bf171adfd8933685837aa3f71bcccde6199ac /drivers/scsi/scsi_debug.c | |
| parent | aa8fecf96b704adfd2ee2b6c76248c1f1cb237ef (diff) | |
| download | linux-98e0a689868c26eb82650ee759073f2295e74c97.tar.xz | |
scsi: scsi_debug: Add zone_size_mb module parameter
Add the zone_size_mb module parameters to control the zone size of a ZBC
device. If the zone size specified is not a divisor of the device capacity,
the last zone of the device will be created as a smaller "runt" zone. This
parameter is ignored for device types other than 0x14 (zbc=2 case).
Note: for testing purposes, zone sizes that are not a power of 2 are
accepted but will result in the drive being rejected by the sd driver.
Link: https://lore.kernel.org/r/20200422104221.378203-7-damien.lemoal@wdc.com
Signed-off-by: Douglas Gilbert <dgilbert@interlog.com>
Signed-off-by: Damien Le Moal <damien.lemoal@wdc.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Diffstat (limited to 'drivers/scsi/scsi_debug.c')
| -rw-r--r-- | drivers/scsi/scsi_debug.c | 12 |
1 files changed, 7 insertions, 5 deletions
diff --git a/drivers/scsi/scsi_debug.c b/drivers/scsi/scsi_debug.c index 76bd679c5af1..14a65604e176 100644 --- a/drivers/scsi/scsi_debug.c +++ b/drivers/scsi/scsi_debug.c @@ -823,7 +823,7 @@ static int dif_errors; /* ZBC global data */ static bool sdeb_zbc_in_use; /* true when ptype=TYPE_ZBC [0x14] */ -static const int zbc_zone_size_mb; +static int sdeb_zbc_zone_size_mb; static int sdeb_zbc_max_open = DEF_ZBC_MAX_OPEN_ZONES; static int sdeb_zbc_nr_conv = DEF_ZBC_NR_CONV_ZONES; @@ -4763,12 +4763,12 @@ static int sdebug_device_create_zones(struct sdebug_dev_info *devip) unsigned int i; /* - * Set the zone size: if zbc_zone_size_mb is not set, figure out a - * zone size allowing for at least 4 zones on the device. Otherwise, + * Set the zone size: if sdeb_zbc_zone_size_mb is not set, figure out + * a zone size allowing for at least 4 zones on the device. Otherwise, * use the specified zone size checking that at least 2 zones can be * created for the device. */ - if (!zbc_zone_size_mb) { + if (!sdeb_zbc_zone_size_mb) { devip->zsize = (DEF_ZBC_ZONE_SIZE_MB * SZ_1M) >> ilog2(sdebug_sector_size); while (capacity < devip->zsize << 2 && devip->zsize >= 2) @@ -4778,7 +4778,7 @@ static int sdebug_device_create_zones(struct sdebug_dev_info *devip) return -EINVAL; } } else { - devip->zsize = (zbc_zone_size_mb * SZ_1M) + devip->zsize = (sdeb_zbc_zone_size_mb * SZ_1M) >> ilog2(sdebug_sector_size); if (devip->zsize >= capacity) { pr_err("Zone size too large for device capacity\n"); @@ -5551,6 +5551,7 @@ module_param_named(write_same_length, sdebug_write_same_length, int, module_param_named(zbc, sdeb_zbc_model_s, charp, S_IRUGO); module_param_named(zone_max_open, sdeb_zbc_max_open, int, S_IRUGO); module_param_named(zone_nr_conv, sdeb_zbc_nr_conv, int, S_IRUGO); +module_param_named(zone_size_mb, sdeb_zbc_zone_size_mb, int, S_IRUGO); MODULE_AUTHOR("Eric Youngdale + Douglas Gilbert"); MODULE_DESCRIPTION("SCSI debug adapter driver"); @@ -5615,6 +5616,7 @@ MODULE_PARM_DESC(write_same_length, "Maximum blocks per WRITE SAME cmd (def=0xff MODULE_PARM_DESC(zbc, "'none' [0]; 'aware' [1]; 'managed' [2] (def=0). Can have 'host-' prefix"); MODULE_PARM_DESC(zone_max_open, "Maximum number of open zones; [0] for no limit (def=auto)"); MODULE_PARM_DESC(zone_nr_conv, "Number of conventional zones (def=1)"); +MODULE_PARM_DESC(zone_size_mb, "Zone size in MiB (def=auto)"); #define SDEBUG_INFO_LEN 256 static char sdebug_info[SDEBUG_INFO_LEN]; |