mirror of https://gitee.com/openkylin/linux.git
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>
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@ -823,7 +823,7 @@ static int dif_errors;
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/* ZBC global data */
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static bool sdeb_zbc_in_use; /* true when ptype=TYPE_ZBC [0x14] */
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static const int zbc_zone_size_mb;
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static int sdeb_zbc_zone_size_mb;
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static int sdeb_zbc_max_open = DEF_ZBC_MAX_OPEN_ZONES;
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static int sdeb_zbc_nr_conv = DEF_ZBC_NR_CONV_ZONES;
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@ -4763,12 +4763,12 @@ static int sdebug_device_create_zones(struct sdebug_dev_info *devip)
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unsigned int i;
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/*
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* Set the zone size: if zbc_zone_size_mb is not set, figure out a
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* zone size allowing for at least 4 zones on the device. Otherwise,
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* Set the zone size: if sdeb_zbc_zone_size_mb is not set, figure out
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* a zone size allowing for at least 4 zones on the device. Otherwise,
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* use the specified zone size checking that at least 2 zones can be
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* created for the device.
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*/
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if (!zbc_zone_size_mb) {
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if (!sdeb_zbc_zone_size_mb) {
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devip->zsize = (DEF_ZBC_ZONE_SIZE_MB * SZ_1M)
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>> ilog2(sdebug_sector_size);
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while (capacity < devip->zsize << 2 && devip->zsize >= 2)
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@ -4778,7 +4778,7 @@ static int sdebug_device_create_zones(struct sdebug_dev_info *devip)
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return -EINVAL;
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}
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} else {
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devip->zsize = (zbc_zone_size_mb * SZ_1M)
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devip->zsize = (sdeb_zbc_zone_size_mb * SZ_1M)
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>> ilog2(sdebug_sector_size);
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if (devip->zsize >= capacity) {
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pr_err("Zone size too large for device capacity\n");
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@ -5551,6 +5551,7 @@ module_param_named(write_same_length, sdebug_write_same_length, int,
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module_param_named(zbc, sdeb_zbc_model_s, charp, S_IRUGO);
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module_param_named(zone_max_open, sdeb_zbc_max_open, int, S_IRUGO);
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module_param_named(zone_nr_conv, sdeb_zbc_nr_conv, int, S_IRUGO);
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module_param_named(zone_size_mb, sdeb_zbc_zone_size_mb, int, S_IRUGO);
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MODULE_AUTHOR("Eric Youngdale + Douglas Gilbert");
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MODULE_DESCRIPTION("SCSI debug adapter driver");
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@ -5615,6 +5616,7 @@ MODULE_PARM_DESC(write_same_length, "Maximum blocks per WRITE SAME cmd (def=0xff
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MODULE_PARM_DESC(zbc, "'none' [0]; 'aware' [1]; 'managed' [2] (def=0). Can have 'host-' prefix");
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MODULE_PARM_DESC(zone_max_open, "Maximum number of open zones; [0] for no limit (def=auto)");
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MODULE_PARM_DESC(zone_nr_conv, "Number of conventional zones (def=1)");
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MODULE_PARM_DESC(zone_size_mb, "Zone size in MiB (def=auto)");
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#define SDEBUG_INFO_LEN 256
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static char sdebug_info[SDEBUG_INFO_LEN];
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