module/splat/splat-kobj.c

   1 /*
   2  *  This file is part of the SPL: Solaris Porting Layer.
   3  *
   4  *  Copyright (c) 2008 Lawrence Livermore National Security, LLC.
   5  *  Produced at Lawrence Livermore National Laboratory
   6  *  Written by:
   7  *          Brian Behlendorf <behlendorf1@llnl.gov>,
   8  *          Herb Wartens <wartens2@llnl.gov>,
   9  *          Jim Garlick <garlick@llnl.gov>
  10  *  UCRL-CODE-235197
  11  *
  12  *  This is free software; you can redistribute it and/or modify it
  13  *  under the terms of the GNU General Public License as published by
  14  *  the Free Software Foundation; either version 2 of the License, or
  15  *  (at your option) any later version.
  16  *
  17  *  This is distributed in the hope that it will be useful, but WITHOUT
  18  *  ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  19  *  FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  20  *  for more details.
  21  *
  22  *  You should have received a copy of the GNU General Public License along
  23  *  with this program; if not, write to the Free Software Foundation, Inc.,
  24  *  51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA.
  25  */
  26
  27 #include "splat-internal.h"
  28
  29 #define SPLAT_KOBJ_NAME                 "kobj"
  30 #define SPLAT_KOBJ_DESC                 "Kernel Kobj Tests"
  31
  32 #define SPLAT_KOBJ_TEST1_ID             0x0a01
  33 #define SPLAT_KOBJ_TEST1_NAME           "open"
  34 #define SPLAT_KOBJ_TEST1_DESC           "Kobj Open/Close Test"
  35
  36 #define SPLAT_KOBJ_TEST2_ID             0x0a02
  37 #define SPLAT_KOBJ_TEST2_NAME           "size/read"
  38 #define SPLAT_KOBJ_TEST2_DESC           "Kobj Size/Read Test"
  39
  40 #define SPLAT_KOBJ_TEST_FILE            "/etc/fstab"
  41
  42 static int
  43 splat_kobj_test1(struct file *file, void *arg)
  44 {
  45         struct _buf *f;
  46
  47         f = kobj_open_file(SPLAT_KOBJ_TEST_FILE);
  48         if (f == (struct _buf *)-1) {
  49                 splat_vprint(file, SPLAT_KOBJ_TEST1_NAME, "Failed to open "
  50                              "test file: %s\n", SPLAT_KOBJ_TEST_FILE);
  51                 return -ENOENT;
  52         }
  53
  54         kobj_close_file(f);
  55         splat_vprint(file, SPLAT_KOBJ_TEST1_NAME, "Successfully opened and "
  56                      "closed test file: %s\n", SPLAT_KOBJ_TEST_FILE);
  57
  58         return 0;
  59 } /* splat_kobj_test1() */
  60
  61 static int
  62 splat_kobj_test2(struct file *file, void *arg)
  63 {
  64         struct _buf *f;
  65         char *buf;
  66         uint64_t size;
  67         int rc;
  68
  69         f = kobj_open_file(SPLAT_KOBJ_TEST_FILE);
  70         if (f == (struct _buf *)-1) {
  71                 splat_vprint(file, SPLAT_KOBJ_TEST2_NAME, "Failed to open "
  72                              "test file: %s\n", SPLAT_KOBJ_TEST_FILE);
  73                 return -ENOENT;
  74         }
  75
  76         rc = kobj_get_filesize(f, &size);
  77         if (rc) {
  78                 splat_vprint(file, SPLAT_KOBJ_TEST2_NAME, "Failed stat of "
  79                              "test file: %s (%d)\n", SPLAT_KOBJ_TEST_FILE, rc);
  80                 goto out;
  81         }
  82
  83         buf = kmalloc(size + 1, GFP_KERNEL);
  84         if (!buf) {
  85                 rc = -ENOMEM;
  86                 splat_vprint(file, SPLAT_KOBJ_TEST2_NAME, "Failed to alloc "
  87                              "%lld bytes for tmp buffer (%d)\n",
  88                              (long long)size, rc);
  89                 goto out;
  90         }
  91
  92         memset(buf, 0, size + 1);
  93         rc = kobj_read_file(f, buf, size, 0);
  94         if (rc < 0) {
  95                 splat_vprint(file, SPLAT_KOBJ_TEST2_NAME, "Failed read of "
  96                              "test file: %s (%d)\n", SPLAT_KOBJ_TEST_FILE, rc);
  97                 goto out2;
  98         }
  99
 100         /* Validate we read as many bytes as expected based on the stat.  This
 101          * isn't a perfect test since we didn't create the file however it is
 102          * pretty unlikely there are garbage characters in your /etc/fstab */
 103         if (size != (uint64_t)strlen(buf)) {
 104                 rc = -EFBIG;
 105                 splat_vprint(file, SPLAT_KOBJ_TEST2_NAME, "Stat'ed size "
 106                              "(%lld) does not match number of bytes read "
 107                              "(%lld)\n", (long long)size,
 108                              (long long)strlen(buf));
 109                 goto out2;
 110         }
 111
 112         rc = 0;
 113         splat_vprint(file, SPLAT_KOBJ_TEST2_NAME, "\n%s\n", buf);
 114         splat_vprint(file, SPLAT_KOBJ_TEST2_NAME, "Successfully stat'ed "
 115                      "and read expected number of bytes (%lld) from test "
 116                      "file: %s\n", (long long)size, SPLAT_KOBJ_TEST_FILE);
 117 out2:
 118         kfree(buf);
 119 out:
 120         kobj_close_file(f);
 121
 122         return rc;
 123 } /* splat_kobj_test2() */
 124
 125 splat_subsystem_t *
 126 splat_kobj_init(void)
 127 {
 128         splat_subsystem_t *sub;
 129
 130         sub = kmalloc(sizeof(*sub), GFP_KERNEL);
 131         if (sub == NULL)
 132                 return NULL;
 133
 134         memset(sub, 0, sizeof(*sub));
 135         strncpy(sub->desc.name, SPLAT_KOBJ_NAME, SPLAT_NAME_SIZE);
 136         strncpy(sub->desc.desc, SPLAT_KOBJ_DESC, SPLAT_DESC_SIZE);
 137         INIT_LIST_HEAD(&sub->subsystem_list);
 138         INIT_LIST_HEAD(&sub->test_list);
 139         spin_lock_init(&sub->test_lock);
 140         sub->desc.id = SPLAT_SUBSYSTEM_KOBJ;
 141
 142         SPLAT_TEST_INIT(sub, SPLAT_KOBJ_TEST1_NAME, SPLAT_KOBJ_TEST1_DESC,
 143                       SPLAT_KOBJ_TEST1_ID, splat_kobj_test1);
 144         SPLAT_TEST_INIT(sub, SPLAT_KOBJ_TEST2_NAME, SPLAT_KOBJ_TEST2_DESC,
 145                       SPLAT_KOBJ_TEST2_ID, splat_kobj_test2);
 146
 147         return sub;
 148 } /* splat_kobj_init() */
 149
 150 void
 151 splat_kobj_fini(splat_subsystem_t *sub)
 152 {
 153         ASSERT(sub);
 154
 155         SPLAT_TEST_FINI(sub, SPLAT_KOBJ_TEST2_ID);
 156         SPLAT_TEST_FINI(sub, SPLAT_KOBJ_TEST1_ID);
 157
 158         kfree(sub);
 159 } /* splat_kobj_fini() */
 160
 161 int
 162 splat_kobj_id(void)
 163 {
 164         return SPLAT_SUBSYSTEM_KOBJ;
 165 } /* splat_kobj_id() */