summaryrefslogtreecommitdiffstats
path: root/smart.c
blob: 1d981ae7f70eb69c9a3a2f1f576c7c48d864d522 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif

#include <fcntl.h>
#include <unistd.h>
#include <errno.h>
#include <string.h>
#include <sys/ioctl.h>
#include <scsi/scsi.h>
#include <scsi/sg.h>
#include <scsi/scsi_ioctl.h>
#include <linux/hdreg.h>
#include <linux/fs.h>
#include <glib.h>

#include "smart.h"

#define SK_TIMEOUT 2000

typedef enum SkDirection {
    SK_DIRECTION_NONE,
    SK_DIRECTION_IN,
    SK_DIRECTION_OUT,
    _SK_DIRECTION_MAX
} SkDirection;

typedef enum SkDeviceType {
    SK_DEVICE_TYPE_ATA_PASSTHROUGH, /* ATA passthrough over SCSI transport */
    SK_DEVICE_TYPE_ATA,
    SK_DEVICE_TYPE_SCSI,
    SK_DEVICE_TYPE_UNKNOWN,
    _SK_DEVICE_TYPE_MAX
} SkDeviceType;

struct SkDevice {
    gchar *name;
    int fd;
    SkDeviceType type;

    guint64 size;

    guint8 identify[512];
    guint8 smart_data[512];
    guint8 smart_threshold_data[512];

    gboolean identify_data_valid:1;
    gboolean smart_data_valid:1;
    gboolean smart_threshold_data_valid:1;

    SkIdentifyParsedData identify_parsed_data;
    SkSmartParsedData smart_parsed_data;
};

/* ATA commands */
typedef enum SkAtaCommand {
    SK_ATA_COMMAND_IDENTIFY_DEVICE = 0xEC,
    SK_ATA_COMMAND_IDENTIFY_PACKET_DEVICE = 0xA1,
    SK_ATA_COMMAND_SMART = 0xB0,
    SK_ATA_COMMAND_CHECK_POWER_MODE = 0xE5
} SkAtaCommand;

/* ATA SMART subcommands (ATA8 7.52.1) */
typedef enum SkSmartCommand {
    SK_SMART_COMMAND_READ_DATA = 0xD0,
    SK_SMART_COMMAND_EXECUTE_OFFLINE_IMMEDIATE = 0xD4,
    SK_SMART_COMMAND_ENABLE_OPERATIONS = 0xD8,
    SK_SMART_COMMAND_DISABLE_OPERATIONS = 0xD9,
    SK_SMART_COMMAND_RETURN_STATUS = 0xDA
} SkSmartCommand;

/* ATA SMART test type (ATA8 7.52.5.2) */
typedef enum SkSmartTest {
    SK_SMART_TEST_OFFLINE_FULL = 0,
    SK_SMART_TEST_OFFLINE_SHORT = 1,
    SK_SMART_TEST_OFFLINE_EXTENDED = 2,
    SK_SMART_TEST_OFFLINE_CONVEYANCE = 3,
    SK_SMART_TEST_OFFLINE_SELECTIVE = 4,

    SK_SMART_TEST_CAPTIVE_SHORT = 129,
    SK_SMART_TEST_CAPTIVE_EXTENDED = 130,
    SK_SMART_TEST_CAPTIVE_CONVEYANCE = 131,
    SK_SMART_TEST_CAPTIVE_SELECTIVE = 132,

    SK_SMART_TEST_CAPTIVE_MASK = 128,
    SK_SMART_TEST_ABORT = 127
} SkSmartTest;

static gboolean disk_smart_is_available(SkDevice *d) {
    return d->identify_data_valid && !!(d->identify[164] & 1);
}

static gboolean disk_smart_is_enabled(SkDevice *d) {
    return d->identify_data_valid && !!(d->identify[170] & 1);
}

static int disk_ata_command(SkDevice *d, SkAtaCommand command, SkDirection direction, gpointer cmd_data, gpointer data, size_t *len) {
    guint8 *bytes = cmd_data;
    int ret;

    g_assert(d->type == SK_DEVICE_TYPE_ATA);

    switch (direction) {

        case SK_DIRECTION_OUT:

            /* We could use HDIO_DRIVE_TASKFILE here, but that's a
             * deprecated ioctl(), hence we don't do it. */

            errno = ENOTSUP;
            return -1;

        case SK_DIRECTION_IN: {
            guint8 *ioctl_data;

            /* We have HDIO_DRIVE_CMD which can only read, but not write,
             * and cannot do LBA. We use it for all read commands. */

            ioctl_data = g_alloca(4 + *len);
            memset(ioctl_data, 0, 4 + *len);

            ioctl_data[0] = (guint8) command;  /* COMMAND */
            ioctl_data[1] = ioctl_data[0] == WIN_SMART ? bytes[9] : bytes[3];  /* SECTOR/NSECTOR */
            ioctl_data[2] = bytes[1];          /* FEATURE */
            ioctl_data[3] = bytes[3];          /* NSECTOR */

            if ((ret = ioctl(d->fd, HDIO_DRIVE_CMD, ioctl_data)) < 0)
                return ret;

            memset(bytes, 0, 12);
            bytes[11] = ioctl_data[0];
            bytes[1] = ioctl_data[1];
            bytes[3] = ioctl_data[2];

            memcpy(data, ioctl_data+4, *len);

            return ret;
        }

        case SK_DIRECTION_NONE: {
            guint8 ioctl_data[7];

            /* We have HDIO_DRIVE_TASK which can neither read nor
             * write, but can do LBA. We use it for all commands that
             * do neither read nor write */

            memset(ioctl_data, 0, sizeof(ioctl_data));

            ioctl_data[0] = (guint8) command;  /* COMMAND */
            ioctl_data[1] = bytes[1];         /* FEATURE */
            ioctl_data[2] = bytes[3];         /* NSECTOR */

            ioctl_data[3] = bytes[9];         /* LBA LOW */
            ioctl_data[4] = bytes[8];         /* LBA MID */
            ioctl_data[5] = bytes[7];         /* LBA HIGH */
            ioctl_data[6] = bytes[10];        /* SELECT */

            if ((ret = ioctl(d->fd, HDIO_DRIVE_TASK, ioctl_data)))
                return ret;

            memset(bytes, 0, 12);
            bytes[11] = ioctl_data[0];
            bytes[1] = ioctl_data[1];
            bytes[3] = ioctl_data[2];

            bytes[9] = ioctl_data[3];
            bytes[8] = ioctl_data[4];
            bytes[7] = ioctl_data[5];

            bytes[10] = ioctl_data[6];

            return ret;
        }

        default:
            g_assert_not_reached();
            return -1;
    }
}

/* Sends a SCSI command block */
static int sg_io(int fd, int direction,
          const void *cdb, size_t cdb_len,
          void *data, size_t data_len,
          void *sense, size_t sense_len) {

    struct sg_io_hdr io_hdr;

    memset(&io_hdr, 0, sizeof(struct sg_io_hdr));

    io_hdr.interface_id = 'S';
    io_hdr.cmdp = (unsigned char*) cdb;
    io_hdr.cmd_len = cdb_len;
    io_hdr.dxferp = data;
    io_hdr.dxfer_len = data_len;
    io_hdr.sbp = sense;
    io_hdr.mx_sb_len = sense_len;
    io_hdr.dxfer_direction = direction;
    io_hdr.timeout = SK_TIMEOUT;

    return ioctl(fd, SG_IO, &io_hdr);
}

static int disk_scsi_command(SkDevice *d, SkAtaCommand command, SkDirection direction, gpointer cmd_data, gpointer data, size_t *len) {
    g_assert(d->type == SK_DEVICE_TYPE_SCSI);

    g_warning("SCSI disks not yet supported because Lennart doesn't have any to test this with.");

    errno = ENOTSUP;
    return -1;
}

static int disk_passthrough_command(SkDevice *d, SkAtaCommand command, SkDirection direction, gpointer cmd_data, gpointer data, size_t *len) {
    guint8 *bytes = cmd_data;
    guint8 cdb[16];
    guint8 sense[32];
    guint8 *desc = sense+8;
    int ret;

    static const int direction_map[] = {
        [SK_DIRECTION_NONE] = SG_DXFER_NONE,
        [SK_DIRECTION_IN] = SG_DXFER_FROM_DEV,
        [SK_DIRECTION_OUT] = SG_DXFER_TO_DEV
    };

    g_assert(d->type == SK_DEVICE_TYPE_ATA_PASSTHROUGH);

    /* ATA Pass-Through 16 byte command, as described in "T10 04-262r8
     * ATA Command Pass-Through":
     * http://www.t10.org/ftp/t10/document.04/04-262r8.pdf */

    memset(cdb, 0, sizeof(cdb));

    cdb[0] = 0x85; /* OPERATION CODE: 16 byte pass through */

    if (direction == SK_DIRECTION_NONE) {
        cdb[1] = 3 << 1; /* PROTOCOL: Non-Data */
        cdb[2] = 0x20;     /* OFF_LINE=0, CK_COND=1, T_DIR=0, BYT_BLOK=0, T_LENGTH=0 */

    } else if (direction == SK_DIRECTION_IN) {
        cdb[1] = 4 << 1; /* PROTOCOL: PIO Data-in */
        cdb[2] = 0x2e;     /* OFF_LINE=0, CK_COND=1, T_DIR=1, BYT_BLOK=1, T_LENGTH=2 */

    } else if (direction == SK_DIRECTION_OUT) {
        cdb[1] = 5 << 1; /* PROTOCOL: PIO Data-Out */
        cdb[2] = 0x26;     /* OFF_LINE=0, CK_COND=1, T_DIR=0, BYT_BLOK=1, T_LENGTH=2 */
    }

    cdb[3] = bytes[0]; /* FEATURES */
    cdb[4] = bytes[1];

    cdb[5] = bytes[2]; /* SECTORS */
    cdb[6] = bytes[3];

    cdb[8] = bytes[9]; /* LBA LOW */
    cdb[10] = bytes[8]; /* LBA MED */
    cdb[12] = bytes[7]; /* LBA HIGH */

    cdb[13] = bytes[10] & 0x4F; /* SELECT */
    cdb[14] = (guint8) command;

    if ((ret = sg_io(d->fd, direction_map[direction], cdb, sizeof(cdb), data, (size_t) cdb[6] * 512, sense, sizeof(sense))) < 0)
        return ret;

    if (sense[0] != 0x72 || desc[0] != 0x9 || desc[1] != 0x0c) {
        errno = EIO;
        return -1;
    }

    memset(bytes, 0, 12);

    bytes[1] = desc[3];
    bytes[2] = desc[4];
    bytes[3] = desc[5];
    bytes[9] = desc[7];
    bytes[8] = desc[9];
    bytes[7] = desc[10];
    bytes[10] = desc[12];
    bytes[11] = desc[13];

    return ret;
}

static int disk_command(SkDevice *d, SkAtaCommand command, SkDirection direction, gpointer cmd_data, gpointer data, size_t *len) {

    static int (* const disk_command_table[_SK_DEVICE_TYPE_MAX]) (SkDevice *d, SkAtaCommand command, SkDirection direction, gpointer cmd_data, gpointer data, size_t *len) = {
        [SK_DEVICE_TYPE_ATA] = disk_ata_command,
        [SK_DEVICE_TYPE_SCSI] = disk_scsi_command,
        [SK_DEVICE_TYPE_ATA_PASSTHROUGH] = disk_passthrough_command,
    };

    g_assert(d);
    g_assert(d->type <= _SK_DEVICE_TYPE_MAX);
    g_assert(direction <= _SK_DIRECTION_MAX);

    g_assert(direction == SK_DIRECTION_NONE || (data && len && *len > 0));
    g_assert(direction != SK_DIRECTION_NONE || (!data && !len));

    return disk_command_table[d->type](d, command, direction, cmd_data, data, len);
}

static int disk_identify_device(SkDevice *d) {
    guint16 cmd[6];
    int ret;
    size_t len = 512;

    memset(cmd, 0, sizeof(cmd));

    cmd[1] = GUINT16_TO_BE(1);

    if ((ret = disk_command(d, SK_ATA_COMMAND_IDENTIFY_DEVICE, SK_DIRECTION_IN, cmd, d->identify, &len)) < 0)
        return ret;

    if (len != 512) {
        errno = EIO;
        return -1;
    }

    d->identify_data_valid = TRUE;

    return 0;
}

int sk_disk_check_power_mode(SkDevice *d, gboolean *mode) {
    int ret;
    guint16 cmd[6];

    if (!d->identify_data_valid) {
        errno = ENOTSUP;
        return -1;
    }

    memset(cmd, 0, sizeof(cmd));

    if ((ret = disk_command(d, SK_ATA_COMMAND_CHECK_POWER_MODE, SK_DIRECTION_NONE, cmd, NULL, 0)) < 0)
        return ret;

    if (cmd[0] != 0 || (GUINT16_FROM_BE(cmd[5]) & 1) != 0) {
        errno = EIO;
        return -1;
    }

    *mode = GUINT16_FROM_BE(cmd[1]) == 0xFF;

    return 0;
}

static int disk_smart_enable(SkDevice *d, gboolean b) {
    guint16 cmd[6];

    if (!disk_smart_is_available(d)) {
        errno = ENOTSUP;
        return -1;
    }

    memset(cmd, 0, sizeof(cmd));

    cmd[0] = GUINT16_TO_BE(b ? SK_SMART_COMMAND_ENABLE_OPERATIONS : SK_SMART_COMMAND_DISABLE_OPERATIONS);
    cmd[2] = GUINT16_TO_BE(0x0000U);
    cmd[3] = GUINT16_TO_BE(0x00C2U);
    cmd[4] = GUINT16_TO_BE(0x4F00U);

    return disk_command(d, SK_ATA_COMMAND_SMART, SK_DIRECTION_NONE, cmd, NULL, 0);
}

int sk_disk_smart_read_data(SkDevice *d) {
    guint16 cmd[6];
    int ret;
    size_t len = 512;

    if (!disk_smart_is_available(d)) {
        errno = ENOTSUP;
        return -1;
    }

    memset(cmd, 0, sizeof(cmd));

    cmd[0] = GUINT16_TO_BE(SK_SMART_COMMAND_READ_DATA);
    cmd[1] = GUINT16_TO_BE(1);
    cmd[2] = GUINT16_TO_BE(0x0000U);
    cmd[3] = GUINT16_TO_BE(0x00C2U);
    cmd[4] = GUINT16_TO_BE(0x4F00U);

    if ((ret = disk_command(d, SK_ATA_COMMAND_SMART, SK_DIRECTION_IN, cmd, d->smart_data, &len)) < 0)
        return ret;

    d->smart_data_valid = TRUE;

    return ret;
}

/* int disk_smart_status(SkDevice *d, SmartLogAddress a, gboolean *b) { */
/*     guint16 cmd[6]; */

/*     guint8 data[16]; */

/*     cmd[0] = GUINT16_TO_BE(SMART_RETURN_STATUS); */
/*     cmd[1] = GUINT16_TO_BE(0x0000U); */
/*     cmd[3] = GUINT16_TO_BE(0x00C2U); */
/*     cmd[4] = GUINT16_TO_BE(0x4F00U | (guint16) a); */

/*     ret = disk_ata_command(SK_ATA_SMART, cmd, sizeof(cmd), NULL, 0); */

/*     return ret; */
/* } */

/* int disk_smart_immediate_offline(SkDevice *d, SmartTestType type) { */
/*     guint16 cmd[6]; */

/*     memset(cmd, 0, sizeof(cmd)); */

/*     cmd[0] = GUINT16_TO_BE(SMART_EXECUTE_OFFLINE_IMMEDIATE); */
/*     cmd[2] = GUINT16_TO_BE(0x0000U); */
/*     cmd[3] = GUINT16_TO_BE(0x00C2U); */
/*     cmd[4] = GUINT16_TO_BE(0x4F00U | (guint16) type); */

/*     return disk_ata_command(SK_ATA_SMART, cmd, sizeof(cmd), NULL, 0); */
/* } */

static void swap_strings(gchar *s, size_t len) {
    g_assert((len & 1) == 0);

    for (; len > 0; s += 2, len -= 2) {
        gchar t;
        t = s[0];
        s[0] = s[1];
        s[1] = t;
    }
}

static void clean_strings(gchar *s) {
    gchar *e;

    for (e = s; *e; e++)
        if (!g_ascii_isprint(*e))
            *e = ' ';
}

static void drop_spaces(gchar *s) {
    gchar *d = s;
    gboolean prev_space = FALSE;

    s += strspn(s, " ");

    for (;*s; s++) {

        if (prev_space) {
            if (*s != ' ') {
                prev_space = FALSE;
                *(d++) = ' ';
            }
        } else {
            if (*s == ' ')
                prev_space = TRUE;
            else
                *(d++) = *s;
        }
    }

    *d = 0;
}

static void read_string(gchar *d, guint8 *s, size_t len) {
    memcpy(d, s, len);
    d[len] = 0;
    swap_strings(d, len);
    clean_strings(d);
    drop_spaces(d);
}

int sk_disk_identify_parse(SkDevice *d, const SkIdentifyParsedData **ipd) {

    if (!d->identify_data_valid) {
        errno = ENOENT;
        return -1;
    }

    read_string(d->identify_parsed_data.serial, d->identify+20, 20);
    read_string(d->identify_parsed_data.firmware, d->identify+46, 8);
    read_string(d->identify_parsed_data.model, d->identify+54, 40);

    *ipd = &d->identify_parsed_data;

    return 0;
}

int sk_disk_smart_is_available(SkDevice *d, gboolean *b) {

    if (!d->identify_data_valid) {
        errno = ENOTSUP;
        return -1;
    }

    *b = disk_smart_is_available(d);
    return 0;
}

int sk_disk_identify_is_available(SkDevice *d, gboolean *b) {

    *b = d->identify_data_valid;
    return 0;
}

const char *sk_offline_data_collection_status_to_string(SkOfflineDataCollectionStatus status) {

    static const char* const map[] = {
        [SK_OFFLINE_DATA_COLLECTION_STATUS_NEVER] = "Off-line data collection activity was never started.",
        [SK_OFFLINE_DATA_COLLECTION_STATUS_SUCCESS] = "Off-line data collection activity was completed without error.",
        [SK_OFFLINE_DATA_COLLECTION_STATUS_INPROGRESS] = "Off-line activity in progress.",
        [SK_OFFLINE_DATA_COLLECTION_STATUS_SUSPENDED] = "Off-line data collection activity was suspended by an interrupting command from host.",
        [SK_OFFLINE_DATA_COLLECTION_STATUS_ABORTED] = "Off-line data collection activity was aborted by an interrupting command from host.",
        [SK_OFFLINE_DATA_COLLECTION_STATUS_FATAL] = "Off-line data collection activity was aborted by the device with a fatal error.",
        [SK_OFFLINE_DATA_COLLECTION_STATUS_UNKNOWN] = "Unknown status"
    };

    if (status >= _SK_OFFLINE_DATA_COLLECTION_STATUS_MAX)
        return NULL;

    return map[status];
}


static const char *lookup_attribute_name(SkDevice *d, guint8 id) {
    return "blah";
}

int sk_disk_smart_parse(SkDevice *d, const SkSmartParsedData **spd) {

    if (!d->smart_data_valid) {
        errno = ENOENT;
        return -1;
    }

    switch (d->smart_data[362]) {
        case 0x00:
        case 0x80:
            d->smart_parsed_data.offline_data_collection_status = SK_OFFLINE_DATA_COLLECTION_STATUS_NEVER;
            break;

        case 0x02:
        case 0x82:
            d->smart_parsed_data.offline_data_collection_status = SK_OFFLINE_DATA_COLLECTION_STATUS_SUCCESS;
            break;

        case 0x03:
            d->smart_parsed_data.offline_data_collection_status = SK_OFFLINE_DATA_COLLECTION_STATUS_INPROGRESS;
            break;

        case 0x04:
        case 0x84:
            d->smart_parsed_data.offline_data_collection_status = SK_OFFLINE_DATA_COLLECTION_STATUS_SUSPENDED;
            break;

        case 0x05:
        case 0x85:
            d->smart_parsed_data.offline_data_collection_status = SK_OFFLINE_DATA_COLLECTION_STATUS_ABORTED;
            break;

        case 0x06:
        case 0x86:
            d->smart_parsed_data.offline_data_collection_status = SK_OFFLINE_DATA_COLLECTION_STATUS_FATAL;
            break;

        default:
            d->smart_parsed_data.offline_data_collection_status = SK_OFFLINE_DATA_COLLECTION_STATUS_UNKNOWN;
            break;
    }

    d->smart_parsed_data.selftest_execution_percent_remaining = 10*(d->smart_data[363] & 0xF);

    d->smart_parsed_data.total_offline_data_collection_seconds = (guint16) d->smart_data[364] | ((guint16) d->smart_data[365] << 8);

    d->smart_parsed_data.conveyance_test_available = !!(d->smart_data[367] & 32);
    d->smart_parsed_data.short_and_extended_test_available = !!(d->smart_data[367] & 16);
    d->smart_parsed_data.start_test_available = !!(d->smart_data[367] & 1);
    d->smart_parsed_data.abort_test_available = !!(d->smart_data[367] & 41);

    d->smart_parsed_data.short_test_polling_minutes = d->smart_data[372];
    d->smart_parsed_data.extended_test_polling_minutes = d->smart_data[373] != 0xFF ? d->smart_data[373] : ((guint16) d->smart_data[376] << 8 | (guint16) d->smart_data[375]);
    d->smart_parsed_data.conveyance_test_polling_minutes = d->smart_data[374];

    *spd = &d->smart_parsed_data;

    return 0;
}

int sk_disk_smart_parse_attributes(SkDevice *d, SkSmartAttributeCallback cb, gpointer userdata) {
    guint8 *p;
    unsigned n = 0;

    if (!d->smart_data_valid) {
        errno = ENOENT;
        return -1;
    }

    for (n = 0, p = d->smart_data + 2; n < 30; n++, p+=12) {
        SkSmartAttribute a;

        if (p[0] == 0)
            continue;

        g_printerr("attr(%i)\t = %i\t (0x02%x)\n", p[0], p[3], p[3]);

        a.id = p[0];
        a.name = lookup_attribute_name(d, p[0]);
        a.value = p[3];

        if (cb)
            cb(d, &a, userdata);
    }

    return 0;
}

static const char *yes_no(gboolean b) {
    return  b ? "yes" : "no";
}

int sk_disk_dump(SkDevice *d) {
    int ret;
    gboolean powered = FALSE;

    g_print("Device: %s\n"
            "Size: %lu MiB\n",
            d->name,
            (unsigned long) (d->size/1024/1024));

    if (d->identify_data_valid) {
        const SkIdentifyParsedData *ipd;

        if ((ret = sk_disk_identify_parse(d, &ipd)) < 0)
            return ret;

        g_print("Model: [%s]\n"
                "Serial: [%s]\n"
                "Firmware: [%s]\n"
                "SMART Available: %s\n",
                ipd->model,
                ipd->serial,
                ipd->firmware,
                yes_no(disk_smart_is_available(d)));
    }

    ret = sk_disk_check_power_mode(d, &powered);
    g_print("Spin-up: %s\n",
            ret >= 0 ? yes_no(powered) : "unknown");

    if (disk_smart_is_available(d)) {
        const SkSmartParsedData *spd;

        if ((ret = sk_disk_smart_read_data(d)) < 0)
            return ret;

        if ((ret = sk_disk_smart_parse(d, &spd)) < 0)
            return ret;

        g_print("Off-line Collection Status: %s\n"
                "Percent Self-Test Remaining: %u%%\n"
                "Total Time To Complete Off-Line Data Collection: %u s\n"
                "Conveyance Self-Test Available: %s\n"
                "Short/Extended Self-Test Available: %s\n"
                "Start Self-Test Available: %s\n"
                "Abort Self-Test Available: %s\n",
                sk_offline_data_collection_status_to_string(spd->offline_data_collection_status),
                spd->selftest_execution_percent_remaining,
                spd->total_offline_data_collection_seconds,
                yes_no(spd->conveyance_test_available),
                yes_no(spd->short_and_extended_test_available),
                yes_no(spd->start_test_available),
                yes_no(spd->abort_test_available));

        if (spd->short_and_extended_test_available)
            g_print("Short Self-Test Polling Time: %u min\n"
                    "Extended Self-Test Polling Time: %u min\n",
                    spd->short_test_polling_minutes,
                    spd->extended_test_polling_minutes);

        if (spd->conveyance_test_available)
            g_print("Conveyance Self-Test Polling Time: %u min\n",
                    spd->conveyance_test_polling_minutes);

    }

    return 0;
}

int sk_disk_get_size(SkDevice *d, guint64 *bytes) {

    *bytes = d->size;
    return 0;
}

int sk_disk_open(const gchar *name, SkDevice **_d) {
    SkDevice *d;
    int ret = -1;

    g_assert(name);
    g_assert(_d);

    d = g_new0(SkDevice, 1);
    d->name = g_strdup(name);

    if ((d->fd = open(name, O_RDWR|O_NOCTTY)) < 0) {
        ret = d->fd;
        goto fail;
    }

    if ((ret = ioctl(d->fd, BLKGETSIZE64, &d->size)) < 0)
        goto fail;

    if (d->size <= 0 || d->size == (guint64) -1) {
        errno = EINVAL;
        goto fail;
    }

    /* Find a way to identify the device */
    for (d->type = 0; d->type != SK_DEVICE_TYPE_UNKNOWN; d->type++)
        if (disk_identify_device(d) >= 0)
            break;

    /* Check if driver can do SMART, and enable if necessary */
    if (disk_smart_is_available(d))
        if (!disk_smart_is_enabled(d))
            if ((ret = disk_smart_enable(d, TRUE)) < 0)
                goto fail;

    *_d = d;

    return 0;

fail:

    if (d)
        sk_disk_free(d);

    return ret;
}

void sk_disk_free(SkDevice *d) {
    g_assert(d);

    if (d->fd >= 0)
        close(d->fd);

    g_free(d->name);
    g_free(d);
}