File: atasmart.h

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/*-*- Mode: C; c-basic-offset: 8 -*-*/

#ifndef fooatasmarthfoo
#define fooatasmarthfoo

/***
    This file is part of libatasmart.

    Copyright 2008 Lennart Poettering

    libatasmart is free software; you can redistribute it and/or modify
    it under the terms of the GNU Lesser General Public License as
    published by the Free Software Foundation, either version 2.1 of the
    License, or (at your option) any later version.

    libatasmart is distributed in the hope that it will be useful, but
    WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
    Lesser General Public License for more details.

    You should have received a copy of the GNU Lesser General Public
    License along with libatasmart. If not, If not, see
    <http://www.gnu.org/licenses/>.
***/

#include <inttypes.h>

/* Please note that all enums defined here may be extended at any time
 * without this being considered an ABI change. So take care when
 * using them as indexes! */

#ifdef __cplusplus
extern "C" {
#endif

typedef unsigned SkBool;

#ifndef FALSE
#define FALSE (0)
#endif

#ifndef TRUE
#define TRUE (!FALSE)
#endif

/* ATA SMART test type (ATA8 7.52.5.2) */
typedef enum SkSmartSelfTest {
        SK_SMART_SELF_TEST_SHORT = 1,
        SK_SMART_SELF_TEST_EXTENDED = 2,
        SK_SMART_SELF_TEST_CONVEYANCE = 3,
        SK_SMART_SELF_TEST_ABORT = 127

        /* This enum may be extended at any time without this being
         * considered an ABI change. So take care when you use this
         * type! */
} SkSmartSelfTest;

const char* sk_smart_self_test_to_string(SkSmartSelfTest test);

typedef struct SkIdentifyParsedData {
        char serial[21];
        char firmware[9];
        char model[41];

        /* This structure may be extended at any time without this being
         * considered an ABI change. So take care when you copy it. */
} SkIdentifyParsedData;

typedef enum SkSmartOfflineDataCollectionStatus {
        SK_SMART_OFFLINE_DATA_COLLECTION_STATUS_NEVER,
        SK_SMART_OFFLINE_DATA_COLLECTION_STATUS_SUCCESS,
        SK_SMART_OFFLINE_DATA_COLLECTION_STATUS_INPROGRESS,
        SK_SMART_OFFLINE_DATA_COLLECTION_STATUS_SUSPENDED,
        SK_SMART_OFFLINE_DATA_COLLECTION_STATUS_ABORTED,
        SK_SMART_OFFLINE_DATA_COLLECTION_STATUS_FATAL,
        SK_SMART_OFFLINE_DATA_COLLECTION_STATUS_UNKNOWN,
        _SK_SMART_OFFLINE_DATA_COLLECTION_STATUS_MAX

        /* This enum may be extended at any time without this being
         * considered an ABI change. So take care when you use this
         * type! */
} SkSmartOfflineDataCollectionStatus;

const char* sk_smart_offline_data_collection_status_to_string(SkSmartOfflineDataCollectionStatus status);

typedef enum SkSmartSelfTestExecutionStatus {
        SK_SMART_SELF_TEST_EXECUTION_STATUS_SUCCESS_OR_NEVER = 0,
        SK_SMART_SELF_TEST_EXECUTION_STATUS_ABORTED = 1,
        SK_SMART_SELF_TEST_EXECUTION_STATUS_INTERRUPTED = 2,
        SK_SMART_SELF_TEST_EXECUTION_STATUS_FATAL = 3,
        SK_SMART_SELF_TEST_EXECUTION_STATUS_ERROR_UNKNOWN = 4,
        SK_SMART_SELF_TEST_EXECUTION_STATUS_ERROR_ELECTRICAL = 5,
        SK_SMART_SELF_TEST_EXECUTION_STATUS_ERROR_SERVO = 6,
        SK_SMART_SELF_TEST_EXECUTION_STATUS_ERROR_READ = 7,
        SK_SMART_SELF_TEST_EXECUTION_STATUS_ERROR_HANDLING = 8,
        SK_SMART_SELF_TEST_EXECUTION_STATUS_INPROGRESS = 15,
        _SK_SMART_SELF_TEST_EXECUTION_STATUS_MAX

        /* This enum may be extended at any time without this being
         * considered an ABI change. So take care when you use this
         * type! */
} SkSmartSelfTestExecutionStatus;

const char *sk_smart_self_test_execution_status_to_string(SkSmartSelfTestExecutionStatus status);

typedef struct SkSmartParsedData {
        /* Volatile data */
        SkSmartOfflineDataCollectionStatus offline_data_collection_status;
        unsigned total_offline_data_collection_seconds;
        SkSmartSelfTestExecutionStatus self_test_execution_status;
        unsigned self_test_execution_percent_remaining;

        /* Fixed data */
        SkBool short_and_extended_test_available:1;
        SkBool conveyance_test_available:1;
        SkBool start_test_available:1;
        SkBool abort_test_available:1;

        unsigned short_test_polling_minutes;
        unsigned extended_test_polling_minutes;
        unsigned conveyance_test_polling_minutes;

        /* This structure may be extended at any time without this being
         * considered an ABI change. So take care when you copy it.  */
} SkSmartParsedData;

SkBool sk_smart_self_test_available(const SkSmartParsedData *d, SkSmartSelfTest test);
unsigned sk_smart_self_test_polling_minutes(const SkSmartParsedData *d, SkSmartSelfTest test);

typedef enum SkSmartAttributeUnit {
        SK_SMART_ATTRIBUTE_UNIT_UNKNOWN,
        SK_SMART_ATTRIBUTE_UNIT_NONE,
        SK_SMART_ATTRIBUTE_UNIT_MSECONDS,      /* milliseconds */
        SK_SMART_ATTRIBUTE_UNIT_SECTORS,
        SK_SMART_ATTRIBUTE_UNIT_MKELVIN,       /* millikelvin */
        SK_SMART_ATTRIBUTE_UNIT_SMALL_PERCENT, /* percentage with 3 decimal points */
        SK_SMART_ATTRIBUTE_UNIT_PERCENT,       /* integer percentage */
        SK_SMART_ATTRIBUTE_UNIT_MB,
        _SK_SMART_ATTRIBUTE_UNIT_MAX

        /* This enum may be extended at any time without this being
         * considered an ABI change. So take care when you use this
         * type! */
} SkSmartAttributeUnit;

const char* sk_smart_attribute_unit_to_string(SkSmartAttributeUnit unit);

typedef struct SkSmartAttributeParsedData {
        /* Fixed data */
        uint8_t id;
        const char *name;
        SkSmartAttributeUnit pretty_unit; /* for pretty_value */

        uint16_t flags;

        uint8_t threshold;
        SkBool threshold_valid:1;

        SkBool online:1;
        SkBool prefailure:1;

        /* Volatile data */
        SkBool good_now:1, good_now_valid:1;
        SkBool good_in_the_past:1, good_in_the_past_valid:1;
        SkBool current_value_valid:1, worst_value_valid:1;
        SkBool warn:1;
        uint8_t current_value, worst_value;
        uint64_t pretty_value;
        uint8_t raw[6];

        /* This structure may be extended at any time without this being
         * considered an ABI change. So take care when you copy it. */
} SkSmartAttributeParsedData;

typedef struct SkDisk SkDisk;

typedef enum SkSmartOverall  {
        SK_SMART_OVERALL_GOOD,
        SK_SMART_OVERALL_BAD_ATTRIBUTE_IN_THE_PAST,  /* At least one pre-fail attribute exceeded its threshold in the past */
        SK_SMART_OVERALL_BAD_SECTOR,                 /* At least one bad sector */
        SK_SMART_OVERALL_BAD_ATTRIBUTE_NOW,          /* At least one pre-fail attribute is exceeding its threshold now */
        SK_SMART_OVERALL_BAD_SECTOR_MANY,            /* Many bad sectors */
        SK_SMART_OVERALL_BAD_STATUS,                 /* Smart Self Assessment negative */
        _SK_SMART_OVERALL_MAX

        /* This enum may be extended at any time without this being
         * considered an ABI change. So take care when you use this
         * type! */
} SkSmartOverall;

const char* sk_smart_overall_to_string(SkSmartOverall overall);

int sk_disk_open(const char *name, SkDisk **d);

int sk_disk_get_size(SkDisk *d, uint64_t *bytes);

int sk_disk_check_sleep_mode(SkDisk *d, SkBool *awake);

int sk_disk_identify_is_available(SkDisk *d, SkBool *available);
int sk_disk_identify_parse(SkDisk *d, const SkIdentifyParsedData **data);

typedef void (*SkSmartAttributeParseCallback)(SkDisk *d, const SkSmartAttributeParsedData *a, void* userdata);

int sk_disk_smart_is_available(SkDisk *d, SkBool *available);
int sk_disk_smart_status(SkDisk *d, SkBool *good);

/* Reading SMART data might cause the disk to wake up from
 * sleep. Hence from monitoring daemons make sure to call
 * sk_disk_check_power_mode() to check wether the disk is sleeping and
 * skip the read if so. */
int sk_disk_smart_read_data(SkDisk *d);

int sk_disk_get_blob(SkDisk *d, const void **blob, size_t *size);
int sk_disk_set_blob(SkDisk *d, const void *blob, size_t size);

int sk_disk_smart_parse(SkDisk *d, const SkSmartParsedData **data);
int sk_disk_smart_parse_attributes(SkDisk *d, SkSmartAttributeParseCallback cb, void* userdata);
int sk_disk_smart_self_test(SkDisk *d, SkSmartSelfTest test);

/* High level API to get the power on time */
int sk_disk_smart_get_power_on(SkDisk *d, uint64_t *mseconds);

/* High level API to get the power cycle count */
int sk_disk_smart_get_power_cycle(SkDisk *d, uint64_t *count);

/* High level API to get the number of bad sectors (i.e. pending and reallocated) */
int sk_disk_smart_get_bad(SkDisk *d, uint64_t *sectors);

/* High level API to get the temperature */
int sk_disk_smart_get_temperature(SkDisk *d, uint64_t *mkelvin);

/* Get overall status. This integrates the values of a couple of fields into a single overall status */
int sk_disk_smart_get_overall(SkDisk *d, SkSmartOverall *overall);

/* Dump the current parsed status to STDOUT */
int sk_disk_dump(SkDisk *d);

void sk_disk_free(SkDisk *d);

#ifdef __cplusplus
}
#endif

#endif