source: mainline/uspace/srv/bd/hr/var.h@ 93ea452

Last change on this file since 93ea452 was e0695ce, checked in by Miroslav Cimerman <mc@…>, 7 weeks ago

hr: save REBUILD position
  • Property mode set to 100644
File size: 4.8 KB
Line 
1/*
2 * Copyright (c) 2025 Miroslav Cimerman
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 *
9 * - Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * - Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 * - The name of the author may not be used to endorse or promote products
15 * derived from this software without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 */
28
29/** @addtogroup hr
30 * @{
31 */
32/**
33 * @file
34 */
35
36#ifndef _HR_VAR_H
37#define _HR_VAR_H
38
39#include <adt/list.h>
40#include <bd_srv.h>
41#include <errno.h>
42#include <fibril_synch.h>
43#include <hr.h>
44#include <stdatomic.h>
45
46#include "fge.h"
47#include "superblock.h"
48
49#define NAME "hr"
50#define HR_STRIP_SIZE DATA_XFER_LIMIT
51
52/*
53 * During a rebuild operation, we save the rebuild
54 * position this each many bytes. Currently each
55 * 10 MiB.
56 */
57#define HR_REBUILD_SAVE_BYTES (10U * 1024 * 1024)
58
59struct hr_volume;
60typedef struct hr_volume hr_volume_t;
61typedef struct hr_stripe hr_stripe_t;
62typedef struct hr_metadata hr_metadata_t;
63typedef struct hr_superblock_ops hr_superblock_ops_t;
64
65typedef struct hr_ops {
66 errno_t (*create)(hr_volume_t *);
67 errno_t (*init)(hr_volume_t *);
68 errno_t (*add_hotspare)(hr_volume_t *, service_id_t);
69 void (*vol_state_eval)(hr_volume_t *);
70 void (*ext_state_cb)(hr_volume_t *, size_t, errno_t);
71} hr_ops_t;
72
73typedef struct hr_volume {
74 link_t lvolumes; /* link to all volumes list */
75 hr_ops_t hr_ops; /* level init and create fcns */
76 bd_srvs_t hr_bds; /* block interface to the vol */
77 service_id_t svc_id; /* service id */
78
79 list_t range_lock_list; /* list of range locks */
80 fibril_mutex_t range_lock_list_lock; /* range locks list lock */
81
82 hr_fpool_t *fge; /* fibril pool */
83
84 void *in_mem_md;
85 fibril_mutex_t md_lock; /* lock protecting in_mem_md */
86
87 hr_superblock_ops_t *meta_ops;
88
89 /* invariants */
90 size_t extent_no; /* number of extents */
91 size_t bsize; /* block size */
92 uint64_t truncated_blkno; /* blkno per extent */
93 uint64_t data_blkno; /* no. of user usable blocks */
94 uint64_t data_offset; /* user data offset in blocks */
95 uint32_t strip_size; /* strip size */
96 hr_level_t level; /* volume level */
97 hr_layout_t layout; /* RAID Level Qualifier */
98 char devname[HR_DEVNAME_LEN];
99
100 hr_extent_t extents[HR_MAX_EXTENTS];
101 fibril_rwlock_t extents_lock; /* extent service id lock */
102
103 size_t hotspare_no; /* no. of available hotspares */
104 hr_extent_t hotspares[HR_MAX_HOTSPARES];
105 fibril_mutex_t hotspare_lock; /* lock protecting hotspares */
106
107 fibril_rwlock_t states_lock; /* states lock */
108
109 _Atomic bool state_dirty; /* dirty state */
110
111 /*
112 * used to increment metadata counter on first write,
113 * allowing non-destructive read-only access
114 */
115 _Atomic bool first_write;
116
117 _Atomic uint64_t rebuild_blk; /* rebuild position */
118 _Atomic int open_cnt; /* open/close() counter */
119 hr_vol_state_t state; /* volume state */
120} hr_volume_t;
121
122typedef enum {
123 HR_BD_READ,
124 HR_BD_WRITE
125} hr_bd_op_type_t;
126
127/* macros for hr_metadata_save() */
128#define WITH_STATE_CALLBACK true
129#define NO_STATE_CALLBACK false
130
131extern errno_t hr_raid0_create(hr_volume_t *);
132extern errno_t hr_raid1_create(hr_volume_t *);
133extern errno_t hr_raid5_create(hr_volume_t *);
134
135extern errno_t hr_raid0_init(hr_volume_t *);
136extern errno_t hr_raid1_init(hr_volume_t *);
137extern errno_t hr_raid5_init(hr_volume_t *);
138
139extern errno_t hr_raid1_add_hotspare(hr_volume_t *, service_id_t);
140extern errno_t hr_raid5_add_hotspare(hr_volume_t *, service_id_t);
141
142extern void hr_raid0_vol_state_eval(hr_volume_t *);
143extern void hr_raid1_vol_state_eval(hr_volume_t *);
144extern void hr_raid5_vol_state_eval(hr_volume_t *);
145
146extern void hr_raid0_ext_state_cb(hr_volume_t *, size_t, errno_t);
147extern void hr_raid1_ext_state_cb(hr_volume_t *, size_t, errno_t);
148extern void hr_raid5_ext_state_cb(hr_volume_t *, size_t, errno_t);
149#endif
150
151/** @}
152 */
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