| 1 | /*
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| 2 | * Copyright (c) 2024 Miroslav Cimerman
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| 3 | * All rights reserved.
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| 4 | *
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| 5 | * Redistribution and use in source and binary forms, with or without
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| 6 | * modification, are permitted provided that the following conditions
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| 7 | * are met:
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| 8 | *
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| 9 | * - Redistributions of source code must retain the above copyright
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| 10 | * notice, this list of conditions and the following disclaimer.
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| 11 | * - Redistributions in binary form must reproduce the above copyright
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| 12 | * notice, this list of conditions and the following disclaimer in the
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| 13 | * documentation and/or other materials provided with the distribution.
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| 14 | * - The name of the author may not be used to endorse or promote products
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| 15 | * derived from this software without specific prior written permission.
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| 16 | *
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| 17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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| 18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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| 19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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| 20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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| 21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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| 22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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| 23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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| 24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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| 25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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| 26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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| 27 | */
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| 28 |
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| 29 | /** @addtogroup libdevice
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| 30 | * @{
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| 31 | */
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| 32 | /**
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| 33 | * @file
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| 34 | */
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| 35 |
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| 36 | #ifndef LIBDEVICE_HR_H
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| 37 | #define LIBDEVICE_HR_H
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| 38 |
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| 39 | #include <async.h>
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| 40 | #include <errno.h>
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| 41 | #include <loc.h>
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| 42 |
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| 43 | /* for now */
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| 44 | #define HR_MAX_EXTENTS 4
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| 45 | #define HR_MAX_HOTSPARES HR_MAX_EXTENTS
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| 46 |
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| 47 | #define HR_DEVNAME_LEN 32
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| 48 |
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| 49 | typedef enum hr_level {
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| 50 | HR_LVL_0 = 0x00, /* striping, no redundancy */
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| 51 | HR_LVL_1 = 0x01, /* n-way mirroring */
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| 52 | HR_LVL_4 = 0x04, /* dedicated parity */
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| 53 | HR_LVL_5 = 0x05, /* distributed parity */
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| 54 | HR_LVL_UNKNOWN = 0xFF
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| 55 | } hr_level_t;
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| 56 |
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| 57 | /*
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| 58 | * SNIA
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| 59 | * Common RAID Disk Data Format
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| 60 | * Specification
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| 61 | * Version 2.0 Revision 19
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| 62 | */
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| 63 | #define HR_RLQ_RAID4_0 0x00 /* RAID-4 Non-Rotating Parity 0 */
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| 64 | #define HR_RLQ_RAID4_N 0x01 /* RAID-4 Non-Rotating Parity N */
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| 65 | #define HR_RLQ_RAID5_0R 0x00 /* RAID-5 Rotating Parity 0 with Data Restart */
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| 66 | #define HR_RLQ_RAID5_NR 0x02 /* RAID-5 Rotating Parity N with Data Restart */
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| 67 | #define HR_RLQ_RAID5_NC 0x03 /* RAID-5 Rotating Parity N with Data Continuation */
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| 68 |
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| 69 | typedef enum hr_vol_status {
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| 70 | HR_VOL_INVALID,
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| 71 | HR_VOL_ONLINE, /* OPTIMAL */
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| 72 | HR_VOL_FAULTY,
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| 73 | HR_VOL_DEGRADED, /* also used for partial, but usable mirror */
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| 74 | HR_VOL_REBUILD
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| 75 | } hr_vol_status_t;
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| 76 |
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| 77 | typedef enum hr_ext_status {
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| 78 | HR_EXT_INVALID,
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| 79 | HR_EXT_ONLINE, /* OK */
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| 80 | HR_EXT_MISSING,
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| 81 | HR_EXT_FAILED,
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| 82 | HR_EXT_REBUILD,
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| 83 | HR_EXT_HOTSPARE
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| 84 | } hr_ext_status_t;
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| 85 |
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| 86 | typedef struct hr {
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| 87 | async_sess_t *sess;
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| 88 | } hr_t;
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| 89 |
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| 90 | typedef struct hr_config {
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| 91 | char devname[HR_DEVNAME_LEN];
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| 92 | service_id_t devs[HR_MAX_EXTENTS];
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| 93 | size_t dev_no;
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| 94 | hr_level_t level;
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| 95 | } hr_config_t;
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| 96 |
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| 97 | typedef struct hr_extent {
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| 98 | service_id_t svc_id;
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| 99 | hr_ext_status_t status;
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| 100 | } hr_extent_t;
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| 101 |
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| 102 | typedef struct hr_vol_info {
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| 103 | hr_extent_t extents[HR_MAX_EXTENTS];
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| 104 | hr_extent_t hotspares[HR_MAX_HOTSPARES];
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| 105 | size_t extent_no;
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| 106 | size_t hotspare_no;
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| 107 | service_id_t svc_id;
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| 108 | hr_level_t level;
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| 109 | uint64_t nblocks;
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| 110 | uint32_t strip_size;
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| 111 | size_t bsize;
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| 112 | hr_vol_status_t status;
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| 113 | uint8_t layout;
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| 114 | } hr_vol_info_t;
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| 115 |
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| 116 | extern errno_t hr_sess_init(hr_t **);
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| 117 | extern void hr_sess_destroy(hr_t *);
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| 118 |
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| 119 | extern errno_t hr_create(hr_t *, hr_config_t *, bool);
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| 120 | extern errno_t hr_stop(const char *, long);
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| 121 | extern errno_t hr_add_hotspare(service_id_t, service_id_t);
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| 122 | extern errno_t hr_print_status(void);
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| 123 |
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| 124 | extern const char *hr_get_vol_status_msg(hr_vol_status_t);
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| 125 | extern const char *hr_get_ext_status_msg(hr_ext_status_t);
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| 126 | extern const char *hr_get_layout_str(hr_level_t, uint8_t);
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| 127 |
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| 128 | #endif
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| 129 |
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| 130 | /** @}
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| 131 | */
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