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Message-ID: <20250314012927.150860-13-jiangjianjun3@huawei.com>
Date: Fri, 14 Mar 2025 09:29:20 +0800
From: JiangJianJun <jiangjianjun3@...wei.com>
To: <jejb@...ux.ibm.com>, <martin.petersen@...cle.com>,
<linux-scsi@...r.kernel.org>
CC: <hare@...e.de>, <linux-kernel@...r.kernel.org>, <lixiaokeng@...wei.com>,
<jiangjianjun3@...wei.com>, <hewenliang4@...wei.com>,
<yangkunlin7@...wei.com>
Subject: [RFC PATCH v3 12/19] scsi: scsi_debug: Add param to control LUN bassed error handler
From: Wenchao Hao <haowenchao2@...wei.com>
Add new module param lun_eh to control if enable LUN based
error handle, and param lun_eh_fallback to control if fallback
to further recover when LUN recovery can not recover all
error commands. This is used to test the LUN based error handle.
Signed-off-by: Wenchao Hao <haowenchao2@...wei.com>
---
drivers/scsi/scsi_debug.c | 12 ++++++++++++
1 file changed, 12 insertions(+)
diff --git a/drivers/scsi/scsi_debug.c b/drivers/scsi/scsi_debug.c
index 5ceaa4665e5d..162728cca99d 100644
--- a/drivers/scsi/scsi_debug.c
+++ b/drivers/scsi/scsi_debug.c
@@ -884,6 +884,8 @@ static bool write_since_sync;
static bool sdebug_statistics = DEF_STATISTICS;
static bool sdebug_wp;
static bool sdebug_allow_restart;
+static bool sdebug_lun_eh;
+static bool sdebug_lun_eh_fallback;
static enum {
BLK_ZONED_NONE = 0,
BLK_ZONED_HA = 1,
@@ -5885,6 +5887,9 @@ static int scsi_debug_sdev_init(struct scsi_device *sdp)
pr_info("sdev_init <%u %u %u %llu>\n",
sdp->host->host_no, sdp->channel, sdp->id, sdp->lun);
+ if (sdebug_lun_eh)
+ return scsi_device_setup_eh(sdp, sdebug_lun_eh_fallback);
+
return 0;
}
@@ -5953,6 +5958,9 @@ static void scsi_debug_sdev_destroy(struct scsi_device *sdp)
/* make this slot available for re-use */
devip->used = false;
sdp->hostdata = NULL;
+
+ if (sdebug_lun_eh)
+ scsi_device_clear_eh(sdp);
}
/* Returns true if we require the queued memory to be freed by the caller. */
@@ -6644,6 +6652,8 @@ 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_param_named(lun_eh, sdebug_lun_eh, bool, S_IRUGO);
+module_param_named(lun_eh_fallback, sdebug_lun_eh_fallback, bool, S_IRUGO);
MODULE_AUTHOR("Eric Youngdale + Douglas Gilbert");
MODULE_DESCRIPTION("SCSI debug adapter driver");
@@ -6723,6 +6733,8 @@ MODULE_PARM_DESC(zone_max_open, "Maximum number of open zones; [0] for no limit
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)");
+MODULE_PARM_DESC(lun_eh, "LUN based error handle (def=0)");
+MODULE_PARM_DESC(lun_eh_fallback, "Fallback to further recovery if LUN recovery failed (def=0)");
#define SDEBUG_INFO_LEN 256
static char sdebug_info[SDEBUG_INFO_LEN];
--
2.33.0
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