lustre/kunit/obd_test.c

   1 // SPDX-License-Identifier: GPL-2.0
   2
   3 /*
   4  * Copyright (c) 2023, Amazon and/or its affiliates. All rights reserved.
   5  * Use is subject to license terms.
   6  *
   7  */
   8
   9 /*
  10  * This file is part of Lustre, http://www.lustre.org/
  11  *
  12  * lustre/kunit/obd_test.c
  13  *
  14  * Simple OBD device for:
  15  *   1) testing OBD device lifecycle management
  16  *   2) demonstrating a simple OBD device
  17  *
  18  * Author: Timothy Day <timday@amazon.com>
  19  *
  20  */
  21
  22 #include <linux/module.h>
  23
  24 #include <obd_class.h>
  25
  26 static int verbose;
  27 module_param(verbose, int, 0644);
  28 MODULE_PARM_DESC(verbose, "Set the logging level for the module");
  29
  30 static int obd_test_setup(struct obd_device *obd, struct lustre_cfg *lcfg)
  31 {
  32         if (verbose >= 1)
  33                 pr_info("Lustre: OBD: %s", __func__);
  34
  35         if (verbose >= 2) {
  36                 int obd_minor_found;
  37
  38                 pr_info("Lustre: OBD: obd_name: %s, obd_num: %i, obd_uuid: %s",
  39                        obd->obd_name, obd->obd_minor, obd->obd_uuid.uuid);
  40
  41                 obd_minor_found = class_name2dev(obd->obd_name);
  42                 pr_info("Lustre: OBD: class_name2dev(): %i, %s",
  43                        obd_minor_found,
  44                        obd_minor_found == obd->obd_minor ? "PASS" : "FAIL");
  45
  46                 obd_minor_found = class_uuid2dev(&obd->obd_uuid);
  47                 pr_info("Lustre: OBD: class_uuid2dev(): %i, %s",
  48                        obd_minor_found,
  49                        obd_minor_found == obd->obd_minor ? "PASS" : "FAIL");
  50
  51                 obd_minor_found = class_name2obd(obd->obd_name)->obd_minor;
  52                 pr_info("Lustre: OBD: class_name2obd(): %i, %s",
  53                        obd_minor_found,
  54                        obd_minor_found == obd->obd_minor ? "PASS" : "FAIL");
  55
  56                 obd_minor_found = class_uuid2obd(&obd->obd_uuid)->obd_minor;
  57                 pr_info("Lustre: OBD: class_uuid2obd(): %i, %s",
  58                        obd_minor_found,
  59                        obd_minor_found == obd->obd_minor ? "PASS" : "FAIL");
  60         }
  61
  62         return 0;
  63 }
  64
  65 static int obd_test_cleanup(struct obd_device *obd)
  66 {
  67         if (verbose >= 1)
  68                 pr_info("Lustre: OBD: %s", __func__);
  69
  70         return 0;
  71 }
  72
  73 static const struct obd_ops obd_test_obd_ops = {
  74         .o_owner       = THIS_MODULE,
  75         .o_setup       = obd_test_setup,
  76         .o_cleanup     = obd_test_cleanup,
  77 };
  78
  79 static int __init obd_test_init(void)
  80 {
  81         return class_register_type(&obd_test_obd_ops, NULL, false,
  82                                    "obd_test", NULL);
  83 }
  84
  85 static void __exit obd_test_exit(void)
  86 {
  87         class_unregister_type("obd_test");
  88 }
  89
  90 MODULE_AUTHOR("Amazon, Inc. <timday@amazon.com>");
  91 MODULE_DESCRIPTION("Lustre OBD test module");
  92 MODULE_VERSION(LUSTRE_VERSION_STRING);
  93 MODULE_LICENSE("GPL");
  94
  95 module_init(obd_test_init);
  96 module_exit(obd_test_exit);