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Message-ID: <20230428013320.347050-2-haowenchao2@huawei.com>
Date:   Fri, 28 Apr 2023 09:33:15 +0800
From:   Wenchao Hao <haowenchao2@...wei.com>
To:     "James E . J . Bottomley" <jejb@...ux.ibm.com>,
        "Martin K . Petersen" <martin.petersen@...cle.com>,
        Douglas Gilbert <dgilbert@...erlog.com>,
        <linux-scsi@...r.kernel.org>, <linux-kernel@...r.kernel.org>
CC:     <linfeilong@...wei.com>, <louhongxiang@...wei.com>,
        Wenchao Hao <haowenchao2@...wei.com>
Subject: [PATCH v2 1/6] scsi:scsi_debug: create scsi_debug directory in the debugfs filesystem

Create directory scsi_debug in the root of the debugfs filesystem.
Prepare to add interface for manage error injection.

Signed-off-by: Wenchao Hao <haowenchao2@...wei.com>
---
 drivers/scsi/scsi_debug.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/drivers/scsi/scsi_debug.c b/drivers/scsi/scsi_debug.c
index 8c58128ad32a..d4bf67f52fbb 100644
--- a/drivers/scsi/scsi_debug.c
+++ b/drivers/scsi/scsi_debug.c
@@ -41,6 +41,7 @@
 #include <linux/random.h>
 #include <linux/xarray.h>
 #include <linux/prefetch.h>
+#include <linux/debugfs.h>
 
 #include <net/checksum.h>
 
@@ -867,6 +868,8 @@ static const int device_qfull_result =
 
 static const int condition_met_result = SAM_STAT_CONDITION_MET;
 
+static struct dentry *sdebug_debugfs_root;
+
 
 /* Only do the extra work involved in logical block provisioning if one or
  * more of the lbpu, lbpws or lbpws10 parameters are given and we are doing
@@ -7019,6 +7022,8 @@ static int __init scsi_debug_init(void)
 		goto driver_unreg;
 	}
 
+	sdebug_debugfs_root = debugfs_create_dir("scsi_debug", NULL);
+
 	for (k = 0; k < hosts_to_add; k++) {
 		if (want_store && k == 0) {
 			ret = sdebug_add_host_helper(idx);
@@ -7065,6 +7070,7 @@ static void __exit scsi_debug_exit(void)
 
 	sdebug_erase_all_stores(false);
 	xa_destroy(per_store_ap);
+	debugfs_remove(sdebug_debugfs_root);
 }
 
 device_initcall(scsi_debug_init);
-- 
2.32.0

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