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scsi: scsi_debug: Add param to control sdev's allow_restart

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Add new module param "allow_restart" to control scsi_device's allow_restart
flag. This flag determines if EH is triggered after a command completes
with sense_key 0x6, ASC 0x4 and ASCQ 0x2. EH would be triggered if
allow_restart=1 in this condition.

The new param can be used with the error injection capability to test how
commands completing with sense_key 0x6, ASC 0x4 and ASCQ 0x2 are handled.

Signed-off-by: Wenchao Hao <haowenchao2@huawei.com>
Link: https://lore.kernel.org/r/20231010092051.608007-11-haowenchao2@huawei.com
Tested-by: Douglas Gilbert <dgilbert@interlog.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Wenchao Hao 2023-10-10 17:20:51 +08:00 committed by Martin K. Petersen
parent f084fe52c6
commit 573c2d066e
1 changed files with 6 additions and 0 deletions
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6
drivers/scsi/scsi_debug.c
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@ -843,6 +843,7 @@ static bool have_dif_prot;
static bool write_since_sync;
static bool sdebug_statistics = DEF_STATISTICS;
static bool sdebug_wp;
static bool sdebug_allow_restart;
/* Following enum: 0: no zbc, def; 1: host aware; 2: host managed */
static enum blk_zoned_model sdeb_zbc_model = BLK_ZONED_NONE;
static char *sdeb_zbc_model_s;
@ -5478,6 +5479,9 @@ static int scsi_debug_slave_configure(struct scsi_device *sdp)
sdp->no_uld_attach = 1;
config_cdb_len(sdp);
if (sdebug_allow_restart)
sdp->allow_restart = 1;
devip->debugfs_entry = debugfs_create_dir(dev_name(&sdp->sdev_dev),
sdebug_debugfs_root);
if (IS_ERR_OR_NULL(devip->debugfs_entry))
@ -6202,6 +6206,7 @@ module_param_named(zone_cap_mb, sdeb_zbc_zone_cap_mb, int, 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_param_named(allow_restart, sdebug_allow_restart, bool, S_IRUGO | S_IWUSR);
MODULE_AUTHOR("Eric Youngdale + Douglas Gilbert");
MODULE_DESCRIPTION("SCSI debug adapter driver");
@ -6274,6 +6279,7 @@ MODULE_PARM_DESC(zone_cap_mb, "Zone capacity in MiB (def=zone size)");
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)");
MODULE_PARM_DESC(allow_restart, "Set scsi_device's allow_restart flag(def=0)");
#define SDEBUG_INFO_LEN 256
static char sdebug_info[SDEBUG_INFO_LEN];