[a3486f2] | 1 | /*
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[c1c1c41] | 2 | * Copyright (c) 2025 Miroslav Cimerman <mc@doas.su>
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[a3486f2] | 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 hr
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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 | #include <stdlib.h>
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| 37 | #include <stdio.h>
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| 38 | #include <str.h>
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| 39 |
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| 40 | #include "io.h"
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| 41 | #include "parity_stripe.h"
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| 42 | #include "util.h"
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| 43 | #include "var.h"
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| 44 |
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[f7169a6] | 45 | static void hr_execute_write_stripe_degraded_mixed(hr_stripe_t *, size_t);
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| 46 | static void hr_execute_write_stripe_degraded(hr_stripe_t *, size_t);
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| 47 | static void hr_execute_write_stripe_optimal_reconstruct(hr_stripe_t *);
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[c5c367a] | 48 | static void hr_execute_write_stripe_subtract(hr_stripe_t *, size_t);
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[f7169a6] | 49 | static void hr_execute_write_stripe(hr_stripe_t *, size_t);
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| 50 | static void hr_execute_read_stripe(hr_stripe_t *, size_t);
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[a3486f2] | 51 | static bool hr_stripe_range_non_extension(const range_t *, const range_t *,
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| 52 | range_t *);
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| 53 | static size_t hr_stripe_merge_extent_spans(hr_stripe_t *, size_t, range_t [2]);
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| 54 | static void hr_stripe_extend_range(range_t *, const range_t *);
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| 55 | static bool hr_ranges_overlap(const range_t *, const range_t *, range_t *);
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| 56 |
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[cdfcaea] | 57 | hr_stripe_t *hr_create_stripes(hr_volume_t *vol, uint64_t strip_size,
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| 58 | size_t cnt, bool write)
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[a3486f2] | 59 | {
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[cdfcaea] | 60 | hr_stripe_t *stripes = hr_calloc_waitok(cnt, sizeof(*stripes));
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[a3486f2] | 61 |
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| 62 | for (size_t i = 0; i < cnt; i++) {
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| 63 | fibril_mutex_initialize(&stripes[i].parity_lock);
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| 64 | fibril_condvar_initialize(&stripes[i].ps_added_cv);
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| 65 | stripes[i].vol = vol;
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| 66 | stripes[i].write = write;
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[cdfcaea] | 67 | stripes[i].parity = hr_calloc_waitok(1, strip_size);
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| 68 | stripes[i].parity_size = strip_size;
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| 69 | stripes[i].extent_span = hr_calloc_waitok(vol->extent_no,
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| 70 | sizeof(*stripes[i].extent_span));
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[a3486f2] | 71 | }
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| 72 |
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| 73 | return stripes;
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| 74 | }
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| 75 |
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| 76 | void hr_destroy_stripes(hr_stripe_t *stripes, size_t cnt)
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| 77 | {
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| 78 | if (stripes == NULL)
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| 79 | return;
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| 80 |
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| 81 | for (size_t i = 0; i < cnt; i++) {
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| 82 | if (stripes[i].parity != NULL)
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| 83 | free(stripes[i].parity);
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| 84 | if (stripes[i].extent_span != NULL)
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| 85 | free(stripes[i].extent_span);
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| 86 | }
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| 87 |
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| 88 | free(stripes);
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| 89 | }
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| 90 |
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[cdfcaea] | 91 | void hr_reset_stripe(hr_stripe_t *stripe)
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| 92 | {
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| 93 | memset(stripe->parity, 0, stripe->parity_size);
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| 94 | stripe->ps_added = 0;
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| 95 | stripe->ps_to_be_added = 0;
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| 96 | stripe->p_count_final = false;
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| 97 |
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| 98 | stripe->rc = EOK;
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| 99 | stripe->abort = false;
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| 100 | stripe->done = false;
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| 101 | }
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| 102 |
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[a3486f2] | 103 | void hr_stripe_commit_parity(hr_stripe_t *stripe, uint64_t strip_off,
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| 104 | const void *data, uint64_t size)
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| 105 | {
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| 106 | fibril_mutex_lock(&stripe->parity_lock);
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| 107 | hr_raid5_xor(stripe->parity + strip_off, data, size);
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| 108 | stripe->ps_added++;
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| 109 | fibril_condvar_broadcast(&stripe->ps_added_cv);
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| 110 | fibril_mutex_unlock(&stripe->parity_lock);
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| 111 | }
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| 112 |
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| 113 | void hr_stripe_wait_for_parity_commits(hr_stripe_t *stripe)
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| 114 | {
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| 115 | fibril_mutex_lock(&stripe->parity_lock);
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| 116 | while ((!stripe->p_count_final ||
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| 117 | stripe->ps_added < stripe->ps_to_be_added) && !stripe->abort) {
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| 118 | fibril_condvar_wait(&stripe->ps_added_cv, &stripe->parity_lock);
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| 119 | }
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| 120 | fibril_mutex_unlock(&stripe->parity_lock);
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| 121 | }
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| 122 |
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| 123 | void hr_stripe_parity_abort(hr_stripe_t *stripe)
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| 124 | {
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| 125 | fibril_mutex_lock(&stripe->parity_lock);
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| 126 | stripe->abort = true;
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| 127 | fibril_condvar_broadcast(&stripe->ps_added_cv);
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| 128 | fibril_mutex_unlock(&stripe->parity_lock);
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| 129 | }
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| 130 |
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[f7169a6] | 131 | void hr_execute_stripe(hr_stripe_t *stripe, size_t bad_extent)
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[a3486f2] | 132 | {
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| 133 | if (stripe->write)
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[f7169a6] | 134 | hr_execute_write_stripe(stripe, bad_extent);
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[a3486f2] | 135 | else
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[f7169a6] | 136 | hr_execute_read_stripe(stripe, bad_extent);
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[a3486f2] | 137 | }
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| 138 |
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[f7169a6] | 139 | void hr_wait_for_stripe(hr_stripe_t *stripe)
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[a3486f2] | 140 | {
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| 141 | stripe->rc = hr_fgroup_wait(stripe->worker_group, NULL, NULL);
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| 142 | if (stripe->rc == EAGAIN)
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| 143 | hr_reset_stripe(stripe);
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| 144 | else
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| 145 | stripe->done = true;
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| 146 | }
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| 147 |
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[f7169a6] | 148 | static void hr_execute_write_stripe_degraded_mixed(hr_stripe_t *stripe,
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| 149 | size_t bad_extent)
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[a3486f2] | 150 | {
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| 151 | hr_volume_t *vol = stripe->vol;
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| 152 |
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[c5c367a] | 153 | stripe->range_count = hr_stripe_merge_extent_spans(stripe,
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| 154 | vol->extent_no, stripe->total_height);
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| 155 |
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[a3486f2] | 156 | size_t worker_cnt = (vol->extent_no - 2) * 3 + 3; /* upper bound */
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| 157 | stripe->worker_group = hr_fgroup_create(vol->fge, worker_cnt);
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| 158 |
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| 159 | stripe->ps_to_be_added = 1;
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| 160 |
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| 161 | hr_io_raid5_t *nop_write = hr_fgroup_alloc(stripe->worker_group);
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| 162 | nop_write->ba = stripe->extent_span[bad_extent].range.start;
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| 163 | nop_write->cnt = stripe->extent_span[bad_extent].cnt;
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| 164 | nop_write->strip_off =
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| 165 | stripe->extent_span[bad_extent].strip_off * vol->bsize;
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| 166 | nop_write->data_write = stripe->extent_span[bad_extent].data_write;
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| 167 | nop_write->vol = vol;
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| 168 | nop_write->stripe = stripe;
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| 169 |
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| 170 | hr_fgroup_submit(stripe->worker_group, hr_io_raid5_noop_writer,
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| 171 | nop_write);
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| 172 |
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| 173 | for (size_t e = 0; e < vol->extent_no; e++) {
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| 174 | if (e == bad_extent || e == stripe->p_extent)
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| 175 | continue;
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| 176 |
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| 177 | range_t uncommon = { 0, 0 };
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| 178 | bool has_uncommon;
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| 179 | has_uncommon = hr_stripe_range_non_extension(
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| 180 | &stripe->extent_span[bad_extent].range,
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| 181 | &stripe->extent_span[e].range,
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| 182 | &uncommon);
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| 183 |
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| 184 | if (stripe->extent_span[e].cnt == 0 || has_uncommon) {
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| 185 | stripe->ps_to_be_added++;
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| 186 |
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| 187 | hr_io_raid5_t *io =
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| 188 | hr_fgroup_alloc(stripe->worker_group);
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| 189 | io->extent = e;
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| 190 | if (stripe->extent_span[bad_extent].cnt == 0) {
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| 191 | io->ba =
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| 192 | stripe->extent_span[bad_extent].range.start;
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| 193 | io->cnt = stripe->extent_span[bad_extent].cnt;
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| 194 | } else {
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| 195 | io->ba = uncommon.start;
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| 196 | io->cnt = uncommon.end - uncommon.start + 1;
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| 197 | }
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| 198 | io->strip_off =
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| 199 | stripe->extent_span[bad_extent].strip_off *
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| 200 | vol->bsize;
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| 201 | io->vol = vol;
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| 202 | io->stripe = stripe;
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| 203 |
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| 204 | hr_fgroup_submit(stripe->worker_group,
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| 205 | hr_io_raid5_reconstruct_reader, io);
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| 206 |
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| 207 | if (stripe->extent_span[e].cnt == 0)
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| 208 | continue;
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| 209 | }
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| 210 |
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| 211 | range_t overlap_range;
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| 212 | bool overlap_up = true;
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| 213 | if (hr_ranges_overlap(&stripe->extent_span[e].range,
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| 214 | &stripe->extent_span[bad_extent].range,
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| 215 | &overlap_range)) {
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| 216 | stripe->ps_to_be_added++;
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| 217 |
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| 218 | hr_io_raid5_t *io =
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| 219 | hr_fgroup_alloc(stripe->worker_group);
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| 220 | io->extent = e;
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| 221 | io->ba = overlap_range.start;
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| 222 | io->cnt = overlap_range.end - overlap_range.start + 1;
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| 223 |
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| 224 | size_t diff = overlap_range.start -
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| 225 | stripe->extent_span[e].range.start;
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| 226 |
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| 227 | io->strip_off =
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| 228 | (stripe->extent_span[e].strip_off + diff) *
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| 229 | vol->bsize;
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| 230 |
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| 231 | io->data_write = stripe->extent_span[e].data_write;
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| 232 | io->data_write += diff * vol->bsize;
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| 233 | if (diff == 0)
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| 234 | overlap_up = false;
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| 235 |
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| 236 | io->vol = vol;
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| 237 | io->stripe = stripe;
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| 238 |
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| 239 | hr_fgroup_submit(stripe->worker_group,
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| 240 | hr_io_raid5_writer, io);
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| 241 | }
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| 242 |
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| 243 | bool has_independent;
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| 244 | range_t independent = { 0, 0 };
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| 245 | has_independent = hr_stripe_range_non_extension(
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| 246 | &stripe->extent_span[e].range,
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| 247 | &stripe->extent_span[bad_extent].range,
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| 248 | &independent);
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| 249 | if (has_independent) {
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| 250 | stripe->ps_to_be_added++;
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| 251 |
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| 252 | hr_io_raid5_t *io =
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| 253 | hr_fgroup_alloc(stripe->worker_group);
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| 254 | io->extent = e;
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| 255 | io->ba = independent.start;
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| 256 | io->cnt = independent.end - independent.start + 1;
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| 257 | size_t diff = 0;
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| 258 | if (!overlap_up) {
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| 259 | diff = overlap_range.end -
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| 260 | overlap_range.start + 1;
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| 261 | }
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| 262 | io->strip_off =
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| 263 | (stripe->extent_span[e].strip_off + diff) *
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| 264 | vol->bsize;
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| 265 | io->data_write = stripe->extent_span[e].data_write;
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| 266 | io->data_write += diff * vol->bsize;
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| 267 | io->vol = vol;
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| 268 | io->stripe = stripe;
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| 269 |
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| 270 | hr_fgroup_submit(stripe->worker_group,
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| 271 | hr_io_raid5_subtract_writer, io);
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| 272 | }
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| 273 | }
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| 274 |
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| 275 | bool has_independent = false;
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| 276 | range_t independent = { 0, 0 };
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| 277 | for (size_t r = 0; r < stripe->range_count; r++) {
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| 278 | has_independent = hr_stripe_range_non_extension(
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| 279 | &stripe->total_height[r],
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| 280 | &stripe->extent_span[bad_extent].range,
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| 281 | &independent);
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| 282 | if (has_independent) {
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| 283 | stripe->ps_to_be_added++;
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| 284 |
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| 285 | hr_io_raid5_t *io =
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| 286 | hr_fgroup_alloc(stripe->worker_group);
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| 287 | io->extent = stripe->p_extent;
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| 288 | io->ba = independent.start;
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| 289 | io->cnt = independent.end - independent.start + 1;
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| 290 |
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| 291 | io->strip_off = io->ba;
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| 292 | hr_sub_data_offset(vol, &io->strip_off);
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| 293 | io->strip_off %= vol->strip_size / vol->bsize;
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| 294 | io->strip_off *= vol->bsize;
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| 295 |
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| 296 | io->vol = vol;
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| 297 | io->stripe = stripe;
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| 298 |
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| 299 | hr_fgroup_submit(stripe->worker_group,
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| 300 | hr_io_raid5_reconstruct_reader, io);
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| 301 | }
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| 302 |
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| 303 | hr_io_raid5_t *pio = hr_fgroup_alloc(stripe->worker_group);
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| 304 | pio->extent = stripe->p_extent;
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| 305 | pio->ba = stripe->total_height[r].start;
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| 306 | pio->cnt = stripe->total_height[r].end -
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| 307 | stripe->total_height[r].start + 1;
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| 308 | pio->strip_off = pio->ba;
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| 309 | hr_sub_data_offset(vol, &pio->strip_off);
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| 310 | pio->strip_off %= vol->strip_size / vol->bsize;
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| 311 | pio->strip_off *= vol->bsize;
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| 312 | pio->vol = vol;
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| 313 | pio->stripe = stripe;
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| 314 |
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| 315 | hr_fgroup_submit(stripe->worker_group,
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| 316 | hr_io_raid5_parity_writer, pio);
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| 317 | }
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| 318 |
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| 319 | stripe->p_count_final = true;
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| 320 | fibril_condvar_broadcast(&stripe->ps_added_cv);
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| 321 | }
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| 322 |
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[f7169a6] | 323 | static void hr_execute_write_stripe_degraded(hr_stripe_t *stripe,
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| 324 | size_t bad_extent)
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[a3486f2] | 325 | {
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| 326 | hr_volume_t *vol = stripe->vol;
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| 327 |
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| 328 | /* parity is bad, issue non-redundant writes */
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| 329 | if (bad_extent == stripe->p_extent) {
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| 330 | stripe->worker_group =
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| 331 | hr_fgroup_create(vol->fge, stripe->strips_touched);
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| 332 |
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| 333 | for (size_t e = 0; e < vol->extent_no; e++) {
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| 334 | if (e == bad_extent)
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| 335 | continue;
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| 336 | if (stripe->extent_span[e].cnt == 0)
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| 337 | continue;
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| 338 |
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| 339 | hr_io_raid5_t *io =
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| 340 | hr_fgroup_alloc(stripe->worker_group);
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| 341 | io->extent = e;
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| 342 | io->data_write = stripe->extent_span[e].data_write;
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| 343 | io->ba = stripe->extent_span[e].range.start;
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| 344 | io->cnt = stripe->extent_span[e].cnt;
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| 345 | io->strip_off =
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| 346 | stripe->extent_span[e].strip_off * vol->bsize;
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| 347 | io->vol = vol;
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| 348 | io->stripe = stripe;
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| 349 |
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| 350 | hr_fgroup_submit(stripe->worker_group,
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| 351 | hr_io_raid5_basic_writer, io);
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| 352 | }
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| 353 |
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| 354 | return;
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| 355 | }
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| 356 |
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| 357 | if (stripe->extent_span[bad_extent].cnt > 0)
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[f7169a6] | 358 | hr_execute_write_stripe_degraded_mixed(stripe, bad_extent);
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[a3486f2] | 359 | else
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[c5c367a] | 360 | hr_execute_write_stripe_subtract(stripe, bad_extent);
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[a3486f2] | 361 | }
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| 362 |
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[f7169a6] | 363 | static void hr_execute_write_stripe_optimal_reconstruct(hr_stripe_t *stripe)
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[a3486f2] | 364 | {
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| 365 | hr_volume_t *vol = stripe->vol;
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| 366 |
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| 367 | stripe->range_count = hr_stripe_merge_extent_spans(stripe,
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| 368 | vol->extent_no, stripe->total_height);
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| 369 |
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| 370 | bool full_stripe = false;
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| 371 | size_t worker_cnt;
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| 372 | if (stripe->strips_touched == vol->extent_no - 1 &&
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| 373 | stripe->partial_strips_touched == 0) {
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| 374 | /* full-stripe */
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| 375 | worker_cnt = stripe->strips_touched; /* writers */
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| 376 | worker_cnt += 1; /* parity writer */
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| 377 |
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| 378 | stripe->ps_to_be_added = stripe->strips_touched;
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| 379 | stripe->p_count_final = true;
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| 380 |
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| 381 | full_stripe = true;
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| 382 | } else {
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| 383 | worker_cnt = stripe->strips_touched; /* writers */
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| 384 |
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| 385 | /* readers (upper bound) */
|
---|
[a0abd46] | 386 | worker_cnt += ((vol->extent_no - 1) - stripe->strips_touched) *
|
---|
| 387 | stripe->range_count;
|
---|
[a3486f2] | 388 | worker_cnt += stripe->partial_strips_touched;
|
---|
| 389 |
|
---|
| 390 | worker_cnt += stripe->range_count; /* parity writer(s) */
|
---|
| 391 |
|
---|
| 392 | stripe->ps_to_be_added = stripe->strips_touched; /* writers */
|
---|
| 393 | }
|
---|
| 394 |
|
---|
| 395 | stripe->worker_group = hr_fgroup_create(vol->fge, worker_cnt);
|
---|
| 396 |
|
---|
| 397 | for (size_t e = 0; e < vol->extent_no; e++) {
|
---|
| 398 | if (e == stripe->p_extent)
|
---|
| 399 | continue;
|
---|
| 400 |
|
---|
| 401 | if (stripe->extent_span[e].cnt == 0)
|
---|
| 402 | continue;
|
---|
| 403 |
|
---|
| 404 | hr_io_raid5_t *io = hr_fgroup_alloc(stripe->worker_group);
|
---|
| 405 | io->extent = e;
|
---|
| 406 | io->data_write = stripe->extent_span[e].data_write;
|
---|
| 407 | io->ba = stripe->extent_span[e].range.start;
|
---|
| 408 | io->cnt = stripe->extent_span[e].cnt;
|
---|
| 409 | io->strip_off = stripe->extent_span[e].strip_off * vol->bsize;
|
---|
| 410 | io->vol = vol;
|
---|
| 411 | io->stripe = stripe;
|
---|
| 412 |
|
---|
| 413 | hr_fgroup_submit(stripe->worker_group, hr_io_raid5_writer, io);
|
---|
| 414 | }
|
---|
| 415 |
|
---|
| 416 | for (size_t r = 0; r < stripe->range_count; r++) {
|
---|
| 417 | if (full_stripe)
|
---|
| 418 | goto skip_readers;
|
---|
| 419 | for (size_t e = 0; e < vol->extent_no; e++) {
|
---|
| 420 | if (e == stripe->p_extent)
|
---|
| 421 | continue;
|
---|
| 422 |
|
---|
| 423 | range_t range_extension = { 0, 0 };
|
---|
| 424 |
|
---|
| 425 | bool need_reader = false;
|
---|
| 426 | if (stripe->extent_span[e].cnt == 0) {
|
---|
| 427 | range_extension = stripe->total_height[r];
|
---|
| 428 | need_reader = true;
|
---|
| 429 | } else {
|
---|
| 430 | need_reader = hr_stripe_range_non_extension(
|
---|
| 431 | &stripe->total_height[r],
|
---|
| 432 | &stripe->extent_span[e].range,
|
---|
| 433 | &range_extension);
|
---|
| 434 | }
|
---|
| 435 |
|
---|
| 436 | if (need_reader) {
|
---|
| 437 | stripe->ps_to_be_added++;
|
---|
| 438 |
|
---|
| 439 | hr_io_raid5_t *io =
|
---|
| 440 | hr_fgroup_alloc(stripe->worker_group);
|
---|
| 441 | io->extent = e;
|
---|
| 442 | io->ba = range_extension.start;
|
---|
| 443 | io->cnt = range_extension.end -
|
---|
| 444 | range_extension.start + 1;
|
---|
| 445 | io->vol = vol;
|
---|
| 446 | io->stripe = stripe;
|
---|
| 447 |
|
---|
| 448 | io->strip_off = io->ba;
|
---|
| 449 | hr_sub_data_offset(vol, &io->strip_off);
|
---|
| 450 | io->strip_off %= vol->strip_size / vol->bsize;
|
---|
| 451 | io->strip_off *= vol->bsize;
|
---|
| 452 |
|
---|
| 453 | hr_fgroup_submit(stripe->worker_group,
|
---|
| 454 | hr_io_raid5_reconstruct_reader, io);
|
---|
| 455 | }
|
---|
| 456 | }
|
---|
| 457 |
|
---|
| 458 | stripe->p_count_final = true;
|
---|
| 459 | fibril_condvar_broadcast(&stripe->ps_added_cv);
|
---|
| 460 |
|
---|
| 461 | skip_readers:
|
---|
| 462 |
|
---|
| 463 | /* parity writer */
|
---|
| 464 | hr_io_raid5_t *io = hr_fgroup_alloc(stripe->worker_group);
|
---|
| 465 | io->extent = stripe->p_extent;
|
---|
| 466 | io->ba = stripe->total_height[r].start;
|
---|
| 467 | io->cnt = stripe->total_height[r].end -
|
---|
| 468 | stripe->total_height[r].start + 1;
|
---|
| 469 | io->vol = vol;
|
---|
| 470 | io->stripe = stripe;
|
---|
| 471 |
|
---|
| 472 | io->strip_off = io->ba;
|
---|
| 473 | hr_sub_data_offset(vol, &io->strip_off);
|
---|
| 474 | io->strip_off %= vol->strip_size / vol->bsize;
|
---|
| 475 | io->strip_off *= vol->bsize;
|
---|
| 476 |
|
---|
| 477 | hr_fgroup_submit(stripe->worker_group,
|
---|
| 478 | hr_io_raid5_parity_writer, io);
|
---|
| 479 | }
|
---|
| 480 | }
|
---|
| 481 |
|
---|
[c5c367a] | 482 | static void hr_execute_write_stripe_subtract(hr_stripe_t *stripe, size_t bad)
|
---|
[a3486f2] | 483 | {
|
---|
| 484 | hr_volume_t *vol = stripe->vol;
|
---|
| 485 |
|
---|
| 486 | stripe->range_count = hr_stripe_merge_extent_spans(stripe,
|
---|
| 487 | vol->extent_no, stripe->total_height);
|
---|
| 488 |
|
---|
| 489 | size_t worker_cnt;
|
---|
| 490 | worker_cnt = stripe->strips_touched; /* writers */
|
---|
| 491 | worker_cnt += stripe->range_count * 2; /* parity readers & writers */
|
---|
| 492 |
|
---|
| 493 | stripe->ps_to_be_added = stripe->strips_touched; /* writers */
|
---|
| 494 | stripe->ps_to_be_added += stripe->range_count; /* parity readers */
|
---|
| 495 | stripe->p_count_final = true;
|
---|
| 496 |
|
---|
| 497 | stripe->worker_group = hr_fgroup_create(vol->fge, worker_cnt);
|
---|
| 498 |
|
---|
| 499 | for (size_t e = 0; e < vol->extent_no; e++) {
|
---|
[c5c367a] | 500 | if (e == bad || e == stripe->p_extent)
|
---|
[a3486f2] | 501 | continue;
|
---|
| 502 |
|
---|
| 503 | if (stripe->extent_span[e].cnt == 0)
|
---|
| 504 | continue;
|
---|
| 505 |
|
---|
| 506 | hr_io_raid5_t *io = hr_fgroup_alloc(stripe->worker_group);
|
---|
| 507 | io->extent = e;
|
---|
| 508 | io->data_write = stripe->extent_span[e].data_write;
|
---|
| 509 | io->ba = stripe->extent_span[e].range.start;
|
---|
| 510 | io->cnt = stripe->extent_span[e].cnt;
|
---|
| 511 | io->strip_off = stripe->extent_span[e].strip_off * vol->bsize;
|
---|
| 512 | io->vol = vol;
|
---|
| 513 | io->stripe = stripe;
|
---|
| 514 |
|
---|
| 515 | hr_fgroup_submit(stripe->worker_group,
|
---|
| 516 | hr_io_raid5_subtract_writer, io);
|
---|
| 517 | }
|
---|
| 518 |
|
---|
| 519 | for (size_t r = 0; r < stripe->range_count; r++) {
|
---|
| 520 | hr_io_raid5_t *p_reader = hr_fgroup_alloc(stripe->worker_group);
|
---|
| 521 | p_reader->extent = stripe->p_extent;
|
---|
| 522 | p_reader->ba = stripe->total_height[r].start;
|
---|
| 523 | p_reader->cnt = stripe->total_height[r].end -
|
---|
| 524 | stripe->total_height[r].start + 1;
|
---|
| 525 | p_reader->vol = vol;
|
---|
| 526 | p_reader->stripe = stripe;
|
---|
| 527 |
|
---|
| 528 | p_reader->strip_off = p_reader->ba;
|
---|
| 529 | hr_sub_data_offset(vol, &p_reader->strip_off);
|
---|
| 530 | p_reader->strip_off %= vol->strip_size / vol->bsize;
|
---|
| 531 | p_reader->strip_off *= vol->bsize;
|
---|
| 532 |
|
---|
| 533 | hr_fgroup_submit(stripe->worker_group,
|
---|
| 534 | hr_io_raid5_reconstruct_reader, p_reader);
|
---|
| 535 |
|
---|
| 536 | hr_io_raid5_t *p_writer = hr_fgroup_alloc(stripe->worker_group);
|
---|
| 537 | p_writer->extent = stripe->p_extent;
|
---|
| 538 | p_writer->ba = stripe->total_height[r].start;
|
---|
| 539 | p_writer->cnt = stripe->total_height[r].end -
|
---|
| 540 | stripe->total_height[r].start + 1;
|
---|
| 541 | p_writer->vol = vol;
|
---|
| 542 | p_writer->stripe = stripe;
|
---|
| 543 |
|
---|
| 544 | p_writer->strip_off = p_writer->ba;
|
---|
| 545 | hr_sub_data_offset(vol, &p_writer->strip_off);
|
---|
| 546 | p_writer->strip_off %= vol->strip_size / vol->bsize;
|
---|
| 547 | p_writer->strip_off *= vol->bsize;
|
---|
| 548 |
|
---|
| 549 | hr_fgroup_submit(stripe->worker_group,
|
---|
| 550 | hr_io_raid5_parity_writer, p_writer);
|
---|
| 551 | }
|
---|
| 552 |
|
---|
| 553 | }
|
---|
| 554 |
|
---|
[f7169a6] | 555 | static void hr_execute_write_stripe(hr_stripe_t *stripe, size_t bad_extent)
|
---|
[a3486f2] | 556 | {
|
---|
| 557 | hr_volume_t *vol = stripe->vol;
|
---|
| 558 |
|
---|
| 559 | if (bad_extent < vol->extent_no) {
|
---|
[f7169a6] | 560 | hr_execute_write_stripe_degraded(stripe, bad_extent);
|
---|
[a3486f2] | 561 | return;
|
---|
| 562 | }
|
---|
| 563 |
|
---|
| 564 | if (stripe->subtract)
|
---|
[c5c367a] | 565 | hr_execute_write_stripe_subtract(stripe, vol->extent_no);
|
---|
[a3486f2] | 566 | else
|
---|
[f7169a6] | 567 | hr_execute_write_stripe_optimal_reconstruct(stripe);
|
---|
[a3486f2] | 568 | }
|
---|
| 569 |
|
---|
[f7169a6] | 570 | static void hr_execute_read_stripe(hr_stripe_t *stripe, size_t bad_extent)
|
---|
[a3486f2] | 571 | {
|
---|
| 572 | hr_volume_t *vol = stripe->vol;
|
---|
| 573 |
|
---|
| 574 | /* no parity involved */
|
---|
| 575 | if (bad_extent == vol->extent_no ||
|
---|
| 576 | bad_extent == stripe->p_extent ||
|
---|
| 577 | stripe->extent_span[bad_extent].cnt == 0) {
|
---|
| 578 | stripe->worker_group =
|
---|
| 579 | hr_fgroup_create(vol->fge, stripe->strips_touched);
|
---|
| 580 | for (size_t e = 0; e < vol->extent_no; e++) {
|
---|
| 581 | if (e == bad_extent || e == stripe->p_extent)
|
---|
| 582 | continue;
|
---|
| 583 | if (stripe->extent_span[e].cnt == 0)
|
---|
| 584 | continue;
|
---|
| 585 |
|
---|
| 586 | hr_io_raid5_t *io =
|
---|
| 587 | hr_fgroup_alloc(stripe->worker_group);
|
---|
| 588 | io->extent = e;
|
---|
| 589 | io->data_read = stripe->extent_span[e].data_read;
|
---|
| 590 | io->ba = stripe->extent_span[e].range.start;
|
---|
| 591 | io->cnt = stripe->extent_span[e].cnt;
|
---|
| 592 | io->strip_off =
|
---|
| 593 | stripe->extent_span[e].strip_off * vol->bsize;
|
---|
| 594 | io->vol = vol;
|
---|
| 595 | io->stripe = stripe;
|
---|
| 596 |
|
---|
| 597 | hr_fgroup_submit(stripe->worker_group,
|
---|
| 598 | hr_io_raid5_basic_reader, io);
|
---|
| 599 | }
|
---|
| 600 |
|
---|
| 601 | return;
|
---|
| 602 | }
|
---|
| 603 |
|
---|
| 604 | /* parity involved */
|
---|
| 605 |
|
---|
| 606 | size_t worker_cnt = (vol->extent_no - 2) * 2 + 1; /* upper bound */
|
---|
| 607 | stripe->worker_group = hr_fgroup_create(vol->fge, worker_cnt);
|
---|
| 608 |
|
---|
| 609 | stripe->ps_to_be_added = 0;
|
---|
| 610 |
|
---|
| 611 | for (size_t e = 0; e < vol->extent_no; e++) {
|
---|
| 612 | if (e == bad_extent || e == stripe->p_extent)
|
---|
| 613 | continue;
|
---|
| 614 |
|
---|
| 615 | range_t uncommon = { 0, 0 };
|
---|
| 616 | bool has_uncommon;
|
---|
| 617 | has_uncommon = hr_stripe_range_non_extension(
|
---|
| 618 | &stripe->extent_span[bad_extent].range,
|
---|
| 619 | &stripe->extent_span[e].range,
|
---|
| 620 | &uncommon);
|
---|
| 621 |
|
---|
| 622 | if (stripe->extent_span[e].cnt == 0 || has_uncommon) {
|
---|
| 623 |
|
---|
| 624 | stripe->ps_to_be_added++;
|
---|
| 625 |
|
---|
| 626 | hr_io_raid5_t *io =
|
---|
| 627 | hr_fgroup_alloc(stripe->worker_group);
|
---|
| 628 | io->extent = e;
|
---|
| 629 | if (stripe->extent_span[bad_extent].cnt == 0) {
|
---|
| 630 | io->ba =
|
---|
| 631 | stripe->extent_span[bad_extent].range.start;
|
---|
| 632 | io->cnt = stripe->extent_span[bad_extent].cnt;
|
---|
| 633 | } else {
|
---|
| 634 | io->ba = uncommon.start;
|
---|
| 635 | io->cnt = uncommon.end - uncommon.start + 1;
|
---|
| 636 | }
|
---|
| 637 | io->strip_off =
|
---|
| 638 | stripe->extent_span[bad_extent].strip_off *
|
---|
| 639 | vol->bsize;
|
---|
| 640 | io->vol = vol;
|
---|
| 641 | io->stripe = stripe;
|
---|
| 642 |
|
---|
| 643 | hr_fgroup_submit(stripe->worker_group,
|
---|
| 644 | hr_io_raid5_reconstruct_reader, io);
|
---|
| 645 |
|
---|
| 646 | if (stripe->extent_span[e].cnt == 0)
|
---|
| 647 | continue;
|
---|
| 648 | }
|
---|
| 649 |
|
---|
| 650 | range_t overlap_range;
|
---|
| 651 | bool overlap_up = true;
|
---|
| 652 | if (hr_ranges_overlap(&stripe->extent_span[e].range,
|
---|
| 653 | &stripe->extent_span[bad_extent].range,
|
---|
| 654 | &overlap_range)) {
|
---|
| 655 |
|
---|
| 656 | stripe->ps_to_be_added++;
|
---|
| 657 |
|
---|
| 658 | hr_io_raid5_t *io =
|
---|
| 659 | hr_fgroup_alloc(stripe->worker_group);
|
---|
| 660 | io->extent = e;
|
---|
| 661 | io->ba = overlap_range.start;
|
---|
| 662 | io->cnt = overlap_range.end - overlap_range.start + 1;
|
---|
| 663 |
|
---|
| 664 | size_t diff = overlap_range.start -
|
---|
| 665 | stripe->extent_span[e].range.start;
|
---|
| 666 | io->strip_off =
|
---|
| 667 | (stripe->extent_span[e].strip_off + diff) *
|
---|
| 668 | vol->bsize;
|
---|
| 669 |
|
---|
| 670 | io->data_read = stripe->extent_span[e].data_read;
|
---|
| 671 | io->data_read += diff * vol->bsize;
|
---|
| 672 | if (diff == 0)
|
---|
| 673 | overlap_up = false;
|
---|
| 674 |
|
---|
| 675 | io->vol = vol;
|
---|
| 676 | io->stripe = stripe;
|
---|
| 677 |
|
---|
| 678 | hr_fgroup_submit(stripe->worker_group,
|
---|
| 679 | hr_io_raid5_reader, io);
|
---|
| 680 | }
|
---|
| 681 |
|
---|
| 682 | bool has_independent;
|
---|
| 683 | range_t independent = { 0, 0 };
|
---|
| 684 | has_independent = hr_stripe_range_non_extension(
|
---|
| 685 | &stripe->extent_span[e].range,
|
---|
| 686 | &uncommon,
|
---|
| 687 | &independent);
|
---|
| 688 | if (has_independent) {
|
---|
| 689 | hr_io_raid5_t *io =
|
---|
| 690 | hr_fgroup_alloc(stripe->worker_group);
|
---|
| 691 | io->extent = e;
|
---|
| 692 | io->ba = independent.start;
|
---|
| 693 | io->cnt = independent.end - independent.start + 1;
|
---|
| 694 | size_t diff = 0;
|
---|
| 695 | if (!overlap_up) {
|
---|
| 696 | diff =
|
---|
| 697 | overlap_range.end - overlap_range.start + 1;
|
---|
| 698 | }
|
---|
| 699 | io->strip_off =
|
---|
| 700 | (stripe->extent_span[e].strip_off + diff) *
|
---|
| 701 | vol->bsize;
|
---|
| 702 | io->data_read = stripe->extent_span[e].data_read;
|
---|
| 703 | io->data_read += diff * vol->bsize;
|
---|
| 704 | io->vol = vol;
|
---|
| 705 | io->stripe = stripe;
|
---|
| 706 |
|
---|
| 707 | hr_fgroup_submit(stripe->worker_group,
|
---|
| 708 | hr_io_raid5_basic_reader, io);
|
---|
| 709 | }
|
---|
| 710 | }
|
---|
| 711 |
|
---|
| 712 | stripe->ps_to_be_added++;
|
---|
| 713 |
|
---|
| 714 | hr_io_raid5_t *io = hr_fgroup_alloc(stripe->worker_group);
|
---|
| 715 | io->extent = stripe->p_extent;
|
---|
| 716 | io->ba = stripe->extent_span[bad_extent].range.start;
|
---|
| 717 | io->cnt = stripe->extent_span[bad_extent].cnt;
|
---|
| 718 | io->strip_off = stripe->extent_span[bad_extent].strip_off * vol->bsize;
|
---|
| 719 | io->vol = vol;
|
---|
| 720 | io->stripe = stripe;
|
---|
| 721 |
|
---|
| 722 | hr_fgroup_submit(stripe->worker_group, hr_io_raid5_reconstruct_reader,
|
---|
| 723 | io);
|
---|
| 724 |
|
---|
| 725 | stripe->p_count_final = true;
|
---|
| 726 | fibril_condvar_broadcast(&stripe->ps_added_cv);
|
---|
| 727 |
|
---|
| 728 | hr_io_raid5_t *pcopier_io = hr_fgroup_alloc(stripe->worker_group);
|
---|
| 729 | pcopier_io->cnt = stripe->extent_span[bad_extent].cnt;
|
---|
| 730 | pcopier_io->strip_off =
|
---|
| 731 | stripe->extent_span[bad_extent].strip_off * vol->bsize;
|
---|
| 732 | pcopier_io->data_read = stripe->extent_span[bad_extent].data_read;
|
---|
| 733 | pcopier_io->vol = vol;
|
---|
| 734 | pcopier_io->stripe = stripe;
|
---|
| 735 |
|
---|
| 736 | hr_fgroup_submit(stripe->worker_group, hr_io_raid5_parity_getter,
|
---|
| 737 | pcopier_io);
|
---|
| 738 | }
|
---|
| 739 |
|
---|
| 740 | /** Get non-overlapping part of 2 ranges.
|
---|
| 741 | *
|
---|
| 742 | * Return part of @param r1 not in @param r2.
|
---|
| 743 | *
|
---|
| 744 | * @param r1 Main range.
|
---|
| 745 | * @param r2 Queried range.
|
---|
| 746 | * @param out Place to store resulting range.
|
---|
| 747 | *
|
---|
| 748 | * @return true if output range is non-empty, else false.
|
---|
| 749 | */
|
---|
| 750 | static bool hr_stripe_range_non_extension(const range_t *r1, const range_t *r2,
|
---|
| 751 | range_t *out)
|
---|
| 752 | {
|
---|
| 753 | if (r1->end < r2->start) {
|
---|
| 754 | *out = *r1;
|
---|
| 755 | return true;
|
---|
| 756 | }
|
---|
| 757 |
|
---|
| 758 | if (r1->start > r2->end) {
|
---|
| 759 | *out = *r1;
|
---|
| 760 | return true;
|
---|
| 761 | }
|
---|
| 762 |
|
---|
| 763 | if (r1->start < r2->start && r1->end >= r2->start) {
|
---|
| 764 | out->start = r1->start;
|
---|
| 765 | out->end = r2->start - 1;
|
---|
| 766 | return out->start <= out->end;
|
---|
| 767 | }
|
---|
| 768 |
|
---|
| 769 | if (r1->start <= r2->end && r1->end > r2->end) {
|
---|
| 770 | out->start = r2->end + 1;
|
---|
| 771 | out->end = r1->end;
|
---|
| 772 | return out->start <= out->end;
|
---|
| 773 | }
|
---|
| 774 |
|
---|
| 775 | return false;
|
---|
| 776 | }
|
---|
| 777 |
|
---|
| 778 | /** Merge adjascent or overlapping extent spans.
|
---|
| 779 | *
|
---|
| 780 | * @param s Stripe.
|
---|
| 781 | * @param extent_no Number of extents.
|
---|
| 782 | * @param out Place to store resulting ranges.
|
---|
| 783 | *
|
---|
| 784 | * @return Number of resulting ranges.
|
---|
| 785 | */
|
---|
| 786 | static size_t hr_stripe_merge_extent_spans(hr_stripe_t *s, size_t extent_no,
|
---|
| 787 | range_t out[2])
|
---|
| 788 | {
|
---|
| 789 | size_t out_count = 0;
|
---|
| 790 |
|
---|
| 791 | for (size_t i = 0; i < extent_no; i++) {
|
---|
| 792 | if (s->extent_span[i].cnt == 0)
|
---|
| 793 | continue;
|
---|
| 794 | const range_t *r = &s->extent_span[i].range;
|
---|
| 795 | bool merged = false;
|
---|
| 796 |
|
---|
| 797 | for (size_t j = 0; j < out_count; j++) {
|
---|
| 798 | if (hr_ranges_overlap(&out[j], r, NULL)) {
|
---|
| 799 | hr_stripe_extend_range(&out[j], r);
|
---|
| 800 | merged = true;
|
---|
| 801 |
|
---|
| 802 | if (out_count == 2 &&
|
---|
| 803 | hr_ranges_overlap(&out[0], &out[1], NULL)) {
|
---|
| 804 | hr_stripe_extend_range(&out[0], &out[1]);
|
---|
| 805 | out_count = 1;
|
---|
| 806 | }
|
---|
| 807 |
|
---|
| 808 | break;
|
---|
| 809 | }
|
---|
| 810 | }
|
---|
| 811 |
|
---|
| 812 | if (!merged) {
|
---|
| 813 | assert(out_count < 2);
|
---|
| 814 | out[out_count++] = *r;
|
---|
| 815 | }
|
---|
| 816 | }
|
---|
| 817 |
|
---|
| 818 | return out_count;
|
---|
| 819 | }
|
---|
| 820 |
|
---|
| 821 | /** Extend a range.
|
---|
| 822 | *
|
---|
| 823 | * @param r1 Output range.
|
---|
| 824 | * @param r2 Range to extend the output one with.
|
---|
| 825 | *
|
---|
| 826 | */
|
---|
| 827 | static void hr_stripe_extend_range(range_t *r1, const range_t *r2)
|
---|
| 828 | {
|
---|
| 829 | if (r2->start < r1->start)
|
---|
| 830 | r1->start = r2->start;
|
---|
| 831 | if (r2->end > r1->end)
|
---|
| 832 | r1->end = r2->end;
|
---|
| 833 | }
|
---|
| 834 |
|
---|
| 835 | static bool hr_ranges_overlap(const range_t *a, const range_t *b, range_t *out)
|
---|
| 836 | {
|
---|
| 837 | uint64_t start = a->start > b->start ? a->start : b->start;
|
---|
| 838 | uint64_t end = a->end < b->end ? a->end : b->end;
|
---|
| 839 |
|
---|
| 840 | if (start <= end) {
|
---|
| 841 | if (out != NULL) {
|
---|
| 842 | out->start = start;
|
---|
| 843 | out->end = end;
|
---|
| 844 | }
|
---|
| 845 |
|
---|
| 846 | return true;
|
---|
| 847 | }
|
---|
| 848 |
|
---|
| 849 | return false;
|
---|
| 850 | }
|
---|
| 851 |
|
---|
| 852 | /** @}
|
---|
| 853 | */
|
---|