source: mainline/uspace/lib/device/include/hr.h@ fc265b4

/*
 * Copyright (c) 2025 Miroslav Cimerman
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * - Redistributions of source code must retain the above copyright
 *   notice, this list of conditions and the following disclaimer.
 * - Redistributions in binary form must reproduce the above copyright
 *   notice, this list of conditions and the following disclaimer in the
 *   documentation and/or other materials provided with the distribution.
 * - The name of the author may not be used to endorse or promote products
 *   derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

/** @addtogroup libdevice
 * @{
 */
/**
 * @file
 */

#ifndef LIBDEVICE_HR_H
#define LIBDEVICE_HR_H

#include <async.h>
#include <errno.h>
#include <loc.h>

/* for now */
#define HR_MAX_EXTENTS 4
#define HR_MAX_HOTSPARES HR_MAX_EXTENTS

#define HR_DEVNAME_LEN 32

typedef enum hr_level {
        HR_LVL_0        = 0x00, /* striping, no redundancy */
        HR_LVL_1        = 0x01, /* n-way mirroring */
        HR_LVL_4        = 0x04, /* dedicated parity */
        HR_LVL_5        = 0x05, /* distributed parity */
        HR_LVL_UNKNOWN  = 0xFF
} hr_level_t;

typedef enum hr_layout {
        HR_RLQ_NONE     = 0,
        HR_RLQ_RAID4_0,         /* RAID-4 Non-Rotating Parity 0 */
        HR_RLQ_RAID4_N,         /* RAID-4 Non-Rotating Parity N */
        HR_RLQ_RAID5_0R,        /* RAID-5 Rotating Parity 0 with Data Restart */
        HR_RLQ_RAID5_NR,        /* RAID-5 Rotating Parity N with Data Restart */
        HR_RLQ_RAID5_NC         /* RAID-5 Rotating Parity N with Data Continuation */
} hr_layout_t;

typedef enum hr_vol_status {
        HR_VOL_NONE = 0,        /* Unknown/None */
        HR_VOL_ONLINE,          /* optimal */
        HR_VOL_FAULTY,          /* unusable */
        HR_VOL_DEGRADED,        /* not optimal */
        HR_VOL_REBUILD          /* rebuild in progress */
} hr_vol_status_t;

typedef enum hr_ext_status {
        HR_EXT_NONE = 0,        /* unknown/none status */
        HR_EXT_INVALID,         /* working but not consistent */
        HR_EXT_ONLINE,          /* ok */
        HR_EXT_MISSING,         /* offline */
        HR_EXT_FAILED,
        HR_EXT_REBUILD,
        HR_EXT_HOTSPARE
} hr_ext_status_t;

typedef struct hr {
        async_sess_t *sess;
} hr_t;

typedef struct hr_config {
        char             devname[HR_DEVNAME_LEN];
        service_id_t     devs[HR_MAX_EXTENTS];
        size_t           dev_no;
        hr_level_t       level;
} hr_config_t;

typedef struct hr_extent {
        service_id_t    svc_id;
        hr_ext_status_t status;
} hr_extent_t;

typedef struct hr_vol_info {
        hr_extent_t      extents[HR_MAX_EXTENTS];
        hr_extent_t      hotspares[HR_MAX_HOTSPARES];
        size_t           extent_no;
        size_t           hotspare_no;
        service_id_t     svc_id;
        hr_level_t       level;
        uint64_t         nblocks;
        uint32_t         strip_size;
        size_t           bsize;
        hr_vol_status_t  status;
        uint8_t          layout;
} hr_vol_info_t;

typedef enum {
        HR_METADATA_NATIVE      = 0,
        HR_METADATA_GEOM_MIRROR,
        HR_METADATA_GEOM_STRIPE,
        HR_METADATA_SOFTRAID,
        HR_METADATA_LAST_DUMMY
} hr_metadata_type_t;

extern errno_t           hr_sess_init(hr_t **);
extern void              hr_sess_destroy(hr_t *);
extern errno_t           hr_create(hr_t *, hr_config_t *);
extern errno_t           hr_assemble(hr_t *, hr_config_t *, size_t *);
extern errno_t           hr_auto_assemble(hr_t *, size_t *);
extern errno_t           hr_stop(hr_t *, const char *);
extern errno_t           hr_stop_all(hr_t *);
extern errno_t           hr_fail_extent(hr_t *, const char *, unsigned long);
extern errno_t           hr_add_hotspare(hr_t *, const char *, const char *);
extern errno_t           hr_print_status(hr_t *);
extern const char       *hr_get_vol_status_msg(hr_vol_status_t);
extern const char       *hr_get_ext_status_msg(hr_ext_status_t);
extern const char       *hr_get_layout_str(hr_layout_t);
extern const char       *hr_get_metadata_type_str(hr_metadata_type_t);

#endif

/** @}
 */