1243 lines
36 KiB
C
1243 lines
36 KiB
C
/*-
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* Copyright (c) 2010 Alexander Motin <mav@FreeBSD.org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <sys/bio.h>
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#include <sys/endian.h>
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#include <sys/kernel.h>
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#include <sys/kobj.h>
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#include <sys/limits.h>
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#include <sys/lock.h>
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#include <sys/malloc.h>
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#include <sys/mutex.h>
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#include <sys/sysctl.h>
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#include <sys/systm.h>
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#include <geom/geom.h>
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#include "geom/raid/g_raid.h"
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#include "g_raid_tr_if.h"
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#define N 2
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SYSCTL_DECL(_kern_geom_raid_raid1e);
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#define RAID1E_REBUILD_SLAB (1 << 20) /* One transation in a rebuild */
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static int g_raid1e_rebuild_slab = RAID1E_REBUILD_SLAB;
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SYSCTL_UINT(_kern_geom_raid_raid1e, OID_AUTO, rebuild_slab_size, CTLFLAG_RWTUN,
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&g_raid1e_rebuild_slab, 0,
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"Amount of the disk to rebuild each read/write cycle of the rebuild.");
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#define RAID1E_REBUILD_FAIR_IO 20 /* use 1/x of the available I/O */
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static int g_raid1e_rebuild_fair_io = RAID1E_REBUILD_FAIR_IO;
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SYSCTL_UINT(_kern_geom_raid_raid1e, OID_AUTO, rebuild_fair_io, CTLFLAG_RWTUN,
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&g_raid1e_rebuild_fair_io, 0,
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"Fraction of the I/O bandwidth to use when disk busy for rebuild.");
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#define RAID1E_REBUILD_CLUSTER_IDLE 100
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static int g_raid1e_rebuild_cluster_idle = RAID1E_REBUILD_CLUSTER_IDLE;
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SYSCTL_UINT(_kern_geom_raid_raid1e, OID_AUTO, rebuild_cluster_idle, CTLFLAG_RWTUN,
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&g_raid1e_rebuild_cluster_idle, 0,
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"Number of slabs to do each time we trigger a rebuild cycle");
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#define RAID1E_REBUILD_META_UPDATE 1024 /* update meta data every 1GB or so */
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static int g_raid1e_rebuild_meta_update = RAID1E_REBUILD_META_UPDATE;
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SYSCTL_UINT(_kern_geom_raid_raid1e, OID_AUTO, rebuild_meta_update, CTLFLAG_RWTUN,
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&g_raid1e_rebuild_meta_update, 0,
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"When to update the meta data.");
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static MALLOC_DEFINE(M_TR_RAID1E, "tr_raid1e_data", "GEOM_RAID RAID1E data");
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#define TR_RAID1E_NONE 0
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#define TR_RAID1E_REBUILD 1
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#define TR_RAID1E_RESYNC 2
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#define TR_RAID1E_F_DOING_SOME 0x1
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#define TR_RAID1E_F_LOCKED 0x2
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#define TR_RAID1E_F_ABORT 0x4
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struct g_raid_tr_raid1e_object {
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struct g_raid_tr_object trso_base;
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int trso_starting;
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int trso_stopping;
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int trso_type;
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int trso_recover_slabs; /* slabs before rest */
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int trso_fair_io;
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int trso_meta_update;
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int trso_flags;
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struct g_raid_subdisk *trso_failed_sd; /* like per volume */
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void *trso_buffer; /* Buffer space */
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off_t trso_lock_pos; /* Locked range start. */
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off_t trso_lock_len; /* Locked range length. */
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struct bio trso_bio;
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};
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static g_raid_tr_taste_t g_raid_tr_taste_raid1e;
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static g_raid_tr_event_t g_raid_tr_event_raid1e;
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static g_raid_tr_start_t g_raid_tr_start_raid1e;
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static g_raid_tr_stop_t g_raid_tr_stop_raid1e;
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static g_raid_tr_iostart_t g_raid_tr_iostart_raid1e;
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static g_raid_tr_iodone_t g_raid_tr_iodone_raid1e;
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static g_raid_tr_kerneldump_t g_raid_tr_kerneldump_raid1e;
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static g_raid_tr_locked_t g_raid_tr_locked_raid1e;
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static g_raid_tr_idle_t g_raid_tr_idle_raid1e;
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static g_raid_tr_free_t g_raid_tr_free_raid1e;
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static kobj_method_t g_raid_tr_raid1e_methods[] = {
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KOBJMETHOD(g_raid_tr_taste, g_raid_tr_taste_raid1e),
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KOBJMETHOD(g_raid_tr_event, g_raid_tr_event_raid1e),
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KOBJMETHOD(g_raid_tr_start, g_raid_tr_start_raid1e),
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KOBJMETHOD(g_raid_tr_stop, g_raid_tr_stop_raid1e),
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KOBJMETHOD(g_raid_tr_iostart, g_raid_tr_iostart_raid1e),
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KOBJMETHOD(g_raid_tr_iodone, g_raid_tr_iodone_raid1e),
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KOBJMETHOD(g_raid_tr_kerneldump, g_raid_tr_kerneldump_raid1e),
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KOBJMETHOD(g_raid_tr_locked, g_raid_tr_locked_raid1e),
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KOBJMETHOD(g_raid_tr_idle, g_raid_tr_idle_raid1e),
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KOBJMETHOD(g_raid_tr_free, g_raid_tr_free_raid1e),
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{ 0, 0 }
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};
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static struct g_raid_tr_class g_raid_tr_raid1e_class = {
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"RAID1E",
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g_raid_tr_raid1e_methods,
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sizeof(struct g_raid_tr_raid1e_object),
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.trc_enable = 1,
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.trc_priority = 200,
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.trc_accept_unmapped = 1
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};
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static void g_raid_tr_raid1e_rebuild_abort(struct g_raid_tr_object *tr);
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static void g_raid_tr_raid1e_maybe_rebuild(struct g_raid_tr_object *tr,
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struct g_raid_subdisk *sd);
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static int g_raid_tr_raid1e_select_read_disk(struct g_raid_volume *vol,
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int no, off_t off, off_t len, u_int mask);
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static inline void
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V2P(struct g_raid_volume *vol, off_t virt,
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int *disk, off_t *offset, off_t *start)
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{
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off_t nstrip;
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u_int strip_size;
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strip_size = vol->v_strip_size;
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/* Strip number. */
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nstrip = virt / strip_size;
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/* Start position in strip. */
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*start = virt % strip_size;
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/* Disk number. */
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*disk = (nstrip * N) % vol->v_disks_count;
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/* Strip start position in disk. */
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*offset = ((nstrip * N) / vol->v_disks_count) * strip_size;
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}
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static inline void
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P2V(struct g_raid_volume *vol, int disk, off_t offset,
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off_t *virt, int *copy)
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{
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off_t nstrip, start;
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u_int strip_size;
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strip_size = vol->v_strip_size;
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/* Start position in strip. */
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start = offset % strip_size;
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/* Physical strip number. */
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nstrip = (offset / strip_size) * vol->v_disks_count + disk;
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/* Number of physical strip (copy) inside virtual strip. */
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*copy = nstrip % N;
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/* Offset in virtual space. */
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*virt = (nstrip / N) * strip_size + start;
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}
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static int
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g_raid_tr_taste_raid1e(struct g_raid_tr_object *tr, struct g_raid_volume *vol)
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{
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struct g_raid_tr_raid1e_object *trs;
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trs = (struct g_raid_tr_raid1e_object *)tr;
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if (tr->tro_volume->v_raid_level != G_RAID_VOLUME_RL_RAID1E ||
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tr->tro_volume->v_raid_level_qualifier != G_RAID_VOLUME_RLQ_R1EA)
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return (G_RAID_TR_TASTE_FAIL);
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trs->trso_starting = 1;
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return (G_RAID_TR_TASTE_SUCCEED);
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}
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static int
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g_raid_tr_update_state_raid1e_even(struct g_raid_volume *vol)
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{
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struct g_raid_softc *sc;
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struct g_raid_subdisk *sd, *bestsd, *worstsd;
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int i, j, state, sstate;
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sc = vol->v_softc;
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state = G_RAID_VOLUME_S_OPTIMAL;
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for (i = 0; i < vol->v_disks_count / N; i++) {
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bestsd = &vol->v_subdisks[i * N];
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for (j = 1; j < N; j++) {
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sd = &vol->v_subdisks[i * N + j];
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if (sd->sd_state > bestsd->sd_state)
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bestsd = sd;
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else if (sd->sd_state == bestsd->sd_state &&
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(sd->sd_state == G_RAID_SUBDISK_S_REBUILD ||
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sd->sd_state == G_RAID_SUBDISK_S_RESYNC) &&
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sd->sd_rebuild_pos > bestsd->sd_rebuild_pos)
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bestsd = sd;
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}
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if (bestsd->sd_state >= G_RAID_SUBDISK_S_UNINITIALIZED &&
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bestsd->sd_state != G_RAID_SUBDISK_S_ACTIVE) {
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/* We found reasonable candidate. */
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G_RAID_DEBUG1(1, sc,
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"Promote subdisk %s:%d from %s to ACTIVE.",
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vol->v_name, bestsd->sd_pos,
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g_raid_subdisk_state2str(bestsd->sd_state));
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g_raid_change_subdisk_state(bestsd,
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G_RAID_SUBDISK_S_ACTIVE);
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g_raid_write_metadata(sc,
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vol, bestsd, bestsd->sd_disk);
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}
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worstsd = &vol->v_subdisks[i * N];
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for (j = 1; j < N; j++) {
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sd = &vol->v_subdisks[i * N + j];
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if (sd->sd_state < worstsd->sd_state)
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worstsd = sd;
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}
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if (worstsd->sd_state == G_RAID_SUBDISK_S_ACTIVE)
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sstate = G_RAID_VOLUME_S_OPTIMAL;
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else if (worstsd->sd_state >= G_RAID_SUBDISK_S_STALE)
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sstate = G_RAID_VOLUME_S_SUBOPTIMAL;
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else if (bestsd->sd_state == G_RAID_SUBDISK_S_ACTIVE)
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sstate = G_RAID_VOLUME_S_DEGRADED;
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else
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sstate = G_RAID_VOLUME_S_BROKEN;
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if (sstate < state)
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state = sstate;
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}
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return (state);
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}
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static int
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g_raid_tr_update_state_raid1e_odd(struct g_raid_volume *vol)
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{
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struct g_raid_softc *sc;
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struct g_raid_subdisk *sd, *bestsd, *worstsd;
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int i, j, state, sstate;
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sc = vol->v_softc;
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if (g_raid_nsubdisks(vol, G_RAID_SUBDISK_S_ACTIVE) ==
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vol->v_disks_count)
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return (G_RAID_VOLUME_S_OPTIMAL);
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for (i = 0; i < vol->v_disks_count; i++) {
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sd = &vol->v_subdisks[i];
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if (sd->sd_state == G_RAID_SUBDISK_S_UNINITIALIZED) {
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/* We found reasonable candidate. */
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G_RAID_DEBUG1(1, sc,
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"Promote subdisk %s:%d from %s to STALE.",
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vol->v_name, sd->sd_pos,
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g_raid_subdisk_state2str(sd->sd_state));
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g_raid_change_subdisk_state(sd,
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G_RAID_SUBDISK_S_STALE);
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g_raid_write_metadata(sc, vol, sd, sd->sd_disk);
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}
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}
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state = G_RAID_VOLUME_S_OPTIMAL;
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for (i = 0; i < vol->v_disks_count; i++) {
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bestsd = &vol->v_subdisks[i];
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worstsd = &vol->v_subdisks[i];
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for (j = 1; j < N; j++) {
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sd = &vol->v_subdisks[(i + j) % vol->v_disks_count];
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if (sd->sd_state > bestsd->sd_state)
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bestsd = sd;
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else if (sd->sd_state == bestsd->sd_state &&
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(sd->sd_state == G_RAID_SUBDISK_S_REBUILD ||
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sd->sd_state == G_RAID_SUBDISK_S_RESYNC) &&
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sd->sd_rebuild_pos > bestsd->sd_rebuild_pos)
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bestsd = sd;
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if (sd->sd_state < worstsd->sd_state)
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worstsd = sd;
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}
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if (worstsd->sd_state == G_RAID_SUBDISK_S_ACTIVE)
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sstate = G_RAID_VOLUME_S_OPTIMAL;
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else if (worstsd->sd_state >= G_RAID_SUBDISK_S_STALE)
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sstate = G_RAID_VOLUME_S_SUBOPTIMAL;
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else if (bestsd->sd_state >= G_RAID_SUBDISK_S_STALE)
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sstate = G_RAID_VOLUME_S_DEGRADED;
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else
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sstate = G_RAID_VOLUME_S_BROKEN;
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if (sstate < state)
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state = sstate;
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}
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return (state);
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}
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static int
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g_raid_tr_update_state_raid1e(struct g_raid_volume *vol,
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struct g_raid_subdisk *sd)
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{
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struct g_raid_tr_raid1e_object *trs;
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struct g_raid_softc *sc;
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u_int s;
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sc = vol->v_softc;
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trs = (struct g_raid_tr_raid1e_object *)vol->v_tr;
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if (trs->trso_stopping &&
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(trs->trso_flags & TR_RAID1E_F_DOING_SOME) == 0)
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s = G_RAID_VOLUME_S_STOPPED;
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else if (trs->trso_starting)
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s = G_RAID_VOLUME_S_STARTING;
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else {
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if ((vol->v_disks_count % N) == 0)
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s = g_raid_tr_update_state_raid1e_even(vol);
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else
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s = g_raid_tr_update_state_raid1e_odd(vol);
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}
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if (s != vol->v_state) {
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g_raid_event_send(vol, G_RAID_VOLUME_S_ALIVE(s) ?
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G_RAID_VOLUME_E_UP : G_RAID_VOLUME_E_DOWN,
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G_RAID_EVENT_VOLUME);
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g_raid_change_volume_state(vol, s);
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if (!trs->trso_starting && !trs->trso_stopping)
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g_raid_write_metadata(sc, vol, NULL, NULL);
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}
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if (!trs->trso_starting && !trs->trso_stopping)
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g_raid_tr_raid1e_maybe_rebuild(vol->v_tr, sd);
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return (0);
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}
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static void
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g_raid_tr_raid1e_fail_disk(struct g_raid_softc *sc, struct g_raid_subdisk *sd,
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struct g_raid_disk *disk)
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{
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struct g_raid_volume *vol;
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vol = sd->sd_volume;
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/*
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* We don't fail the last disk in the pack, since it still has decent
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* data on it and that's better than failing the disk if it is the root
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* file system.
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*
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* XXX should this be controlled via a tunable? It makes sense for
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* the volume that has / on it. I can't think of a case where we'd
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* want the volume to go away on this kind of event.
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*/
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if ((g_raid_nsubdisks(vol, G_RAID_SUBDISK_S_ACTIVE) +
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g_raid_nsubdisks(vol, G_RAID_SUBDISK_S_RESYNC) +
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g_raid_nsubdisks(vol, G_RAID_SUBDISK_S_STALE) +
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g_raid_nsubdisks(vol, G_RAID_SUBDISK_S_UNINITIALIZED) <
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vol->v_disks_count) &&
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(sd->sd_state >= G_RAID_SUBDISK_S_UNINITIALIZED))
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return;
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g_raid_fail_disk(sc, sd, disk);
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}
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static void
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g_raid_tr_raid1e_rebuild_done(struct g_raid_tr_raid1e_object *trs)
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{
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struct g_raid_volume *vol;
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struct g_raid_subdisk *sd;
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vol = trs->trso_base.tro_volume;
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sd = trs->trso_failed_sd;
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g_raid_write_metadata(vol->v_softc, vol, sd, sd->sd_disk);
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free(trs->trso_buffer, M_TR_RAID1E);
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trs->trso_buffer = NULL;
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trs->trso_flags &= ~TR_RAID1E_F_DOING_SOME;
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trs->trso_type = TR_RAID1E_NONE;
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trs->trso_recover_slabs = 0;
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trs->trso_failed_sd = NULL;
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g_raid_tr_update_state_raid1e(vol, NULL);
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}
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static void
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g_raid_tr_raid1e_rebuild_finish(struct g_raid_tr_object *tr)
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{
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struct g_raid_tr_raid1e_object *trs;
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struct g_raid_subdisk *sd;
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trs = (struct g_raid_tr_raid1e_object *)tr;
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sd = trs->trso_failed_sd;
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G_RAID_DEBUG1(0, tr->tro_volume->v_softc,
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"Subdisk %s:%d-%s rebuild completed.",
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sd->sd_volume->v_name, sd->sd_pos,
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sd->sd_disk ? g_raid_get_diskname(sd->sd_disk) : "[none]");
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g_raid_change_subdisk_state(sd, G_RAID_SUBDISK_S_ACTIVE);
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sd->sd_rebuild_pos = 0;
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g_raid_tr_raid1e_rebuild_done(trs);
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}
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static void
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g_raid_tr_raid1e_rebuild_abort(struct g_raid_tr_object *tr)
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{
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struct g_raid_tr_raid1e_object *trs;
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struct g_raid_subdisk *sd;
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struct g_raid_volume *vol;
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vol = tr->tro_volume;
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trs = (struct g_raid_tr_raid1e_object *)tr;
|
|
sd = trs->trso_failed_sd;
|
|
if (trs->trso_flags & TR_RAID1E_F_DOING_SOME) {
|
|
G_RAID_DEBUG1(1, vol->v_softc,
|
|
"Subdisk %s:%d-%s rebuild is aborting.",
|
|
sd->sd_volume->v_name, sd->sd_pos,
|
|
sd->sd_disk ? g_raid_get_diskname(sd->sd_disk) : "[none]");
|
|
trs->trso_flags |= TR_RAID1E_F_ABORT;
|
|
} else {
|
|
G_RAID_DEBUG1(0, vol->v_softc,
|
|
"Subdisk %s:%d-%s rebuild aborted.",
|
|
sd->sd_volume->v_name, sd->sd_pos,
|
|
sd->sd_disk ? g_raid_get_diskname(sd->sd_disk) : "[none]");
|
|
trs->trso_flags &= ~TR_RAID1E_F_ABORT;
|
|
if (trs->trso_flags & TR_RAID1E_F_LOCKED) {
|
|
trs->trso_flags &= ~TR_RAID1E_F_LOCKED;
|
|
g_raid_unlock_range(tr->tro_volume,
|
|
trs->trso_lock_pos, trs->trso_lock_len);
|
|
}
|
|
g_raid_tr_raid1e_rebuild_done(trs);
|
|
}
|
|
}
|
|
|
|
static void
|
|
g_raid_tr_raid1e_rebuild_some(struct g_raid_tr_object *tr)
|
|
{
|
|
struct g_raid_tr_raid1e_object *trs;
|
|
struct g_raid_softc *sc;
|
|
struct g_raid_volume *vol;
|
|
struct g_raid_subdisk *sd;
|
|
struct bio *bp;
|
|
off_t len, virtual, vend, offset, start;
|
|
int disk, copy, best;
|
|
|
|
trs = (struct g_raid_tr_raid1e_object *)tr;
|
|
if (trs->trso_flags & TR_RAID1E_F_DOING_SOME)
|
|
return;
|
|
vol = tr->tro_volume;
|
|
sc = vol->v_softc;
|
|
sd = trs->trso_failed_sd;
|
|
|
|
while (1) {
|
|
if (sd->sd_rebuild_pos >= sd->sd_size) {
|
|
g_raid_tr_raid1e_rebuild_finish(tr);
|
|
return;
|
|
}
|
|
/* Get virtual offset from physical rebuild position. */
|
|
P2V(vol, sd->sd_pos, sd->sd_rebuild_pos, &virtual, ©);
|
|
/* Get physical offset back to get first stripe position. */
|
|
V2P(vol, virtual, &disk, &offset, &start);
|
|
/* Calculate contignous data length. */
|
|
len = MIN(g_raid1e_rebuild_slab,
|
|
sd->sd_size - sd->sd_rebuild_pos);
|
|
if ((vol->v_disks_count % N) != 0)
|
|
len = MIN(len, vol->v_strip_size - start);
|
|
/* Find disk with most accurate data. */
|
|
best = g_raid_tr_raid1e_select_read_disk(vol, disk,
|
|
offset + start, len, 0);
|
|
if (best < 0) {
|
|
/* There is no any valid disk. */
|
|
g_raid_tr_raid1e_rebuild_abort(tr);
|
|
return;
|
|
} else if (best != copy) {
|
|
/* Some other disk has better data. */
|
|
break;
|
|
}
|
|
/* We have the most accurate data. Skip the range. */
|
|
G_RAID_DEBUG1(3, sc, "Skipping rebuild for range %ju - %ju",
|
|
sd->sd_rebuild_pos, sd->sd_rebuild_pos + len);
|
|
sd->sd_rebuild_pos += len;
|
|
}
|
|
|
|
bp = &trs->trso_bio;
|
|
memset(bp, 0, sizeof(*bp));
|
|
bp->bio_offset = offset + start +
|
|
((disk + best >= vol->v_disks_count) ? vol->v_strip_size : 0);
|
|
bp->bio_length = len;
|
|
bp->bio_data = trs->trso_buffer;
|
|
bp->bio_cmd = BIO_READ;
|
|
bp->bio_cflags = G_RAID_BIO_FLAG_SYNC;
|
|
bp->bio_caller1 = &vol->v_subdisks[(disk + best) % vol->v_disks_count];
|
|
G_RAID_LOGREQ(3, bp, "Queueing rebuild read");
|
|
/*
|
|
* If we are crossing stripe boundary, correct affected virtual
|
|
* range we should lock.
|
|
*/
|
|
if (start + len > vol->v_strip_size) {
|
|
P2V(vol, sd->sd_pos, sd->sd_rebuild_pos + len, &vend, ©);
|
|
len = vend - virtual;
|
|
}
|
|
trs->trso_flags |= TR_RAID1E_F_DOING_SOME;
|
|
trs->trso_flags |= TR_RAID1E_F_LOCKED;
|
|
trs->trso_lock_pos = virtual;
|
|
trs->trso_lock_len = len;
|
|
/* Lock callback starts I/O */
|
|
g_raid_lock_range(sd->sd_volume, virtual, len, NULL, bp);
|
|
}
|
|
|
|
static void
|
|
g_raid_tr_raid1e_rebuild_start(struct g_raid_tr_object *tr)
|
|
{
|
|
struct g_raid_volume *vol;
|
|
struct g_raid_tr_raid1e_object *trs;
|
|
struct g_raid_subdisk *sd;
|
|
|
|
vol = tr->tro_volume;
|
|
trs = (struct g_raid_tr_raid1e_object *)tr;
|
|
if (trs->trso_failed_sd) {
|
|
G_RAID_DEBUG1(1, vol->v_softc,
|
|
"Already rebuild in start rebuild. pos %jd\n",
|
|
(intmax_t)trs->trso_failed_sd->sd_rebuild_pos);
|
|
return;
|
|
}
|
|
sd = g_raid_get_subdisk(vol, G_RAID_SUBDISK_S_RESYNC);
|
|
if (sd == NULL)
|
|
sd = g_raid_get_subdisk(vol, G_RAID_SUBDISK_S_REBUILD);
|
|
if (sd == NULL) {
|
|
sd = g_raid_get_subdisk(vol, G_RAID_SUBDISK_S_STALE);
|
|
if (sd != NULL) {
|
|
sd->sd_rebuild_pos = 0;
|
|
g_raid_change_subdisk_state(sd,
|
|
G_RAID_SUBDISK_S_RESYNC);
|
|
g_raid_write_metadata(vol->v_softc, vol, sd, NULL);
|
|
} else {
|
|
sd = g_raid_get_subdisk(vol,
|
|
G_RAID_SUBDISK_S_UNINITIALIZED);
|
|
if (sd == NULL)
|
|
sd = g_raid_get_subdisk(vol,
|
|
G_RAID_SUBDISK_S_NEW);
|
|
if (sd != NULL) {
|
|
sd->sd_rebuild_pos = 0;
|
|
g_raid_change_subdisk_state(sd,
|
|
G_RAID_SUBDISK_S_REBUILD);
|
|
g_raid_write_metadata(vol->v_softc,
|
|
vol, sd, NULL);
|
|
}
|
|
}
|
|
}
|
|
if (sd == NULL) {
|
|
G_RAID_DEBUG1(1, vol->v_softc,
|
|
"No failed disk to rebuild. night night.");
|
|
return;
|
|
}
|
|
trs->trso_failed_sd = sd;
|
|
G_RAID_DEBUG1(0, vol->v_softc,
|
|
"Subdisk %s:%d-%s rebuild start at %jd.",
|
|
sd->sd_volume->v_name, sd->sd_pos,
|
|
sd->sd_disk ? g_raid_get_diskname(sd->sd_disk) : "[none]",
|
|
trs->trso_failed_sd->sd_rebuild_pos);
|
|
trs->trso_type = TR_RAID1E_REBUILD;
|
|
trs->trso_buffer = malloc(g_raid1e_rebuild_slab, M_TR_RAID1E, M_WAITOK);
|
|
trs->trso_meta_update = g_raid1e_rebuild_meta_update;
|
|
g_raid_tr_raid1e_rebuild_some(tr);
|
|
}
|
|
|
|
static void
|
|
g_raid_tr_raid1e_maybe_rebuild(struct g_raid_tr_object *tr,
|
|
struct g_raid_subdisk *sd)
|
|
{
|
|
struct g_raid_volume *vol;
|
|
struct g_raid_tr_raid1e_object *trs;
|
|
int nr;
|
|
|
|
vol = tr->tro_volume;
|
|
trs = (struct g_raid_tr_raid1e_object *)tr;
|
|
if (trs->trso_stopping)
|
|
return;
|
|
nr = g_raid_nsubdisks(vol, G_RAID_SUBDISK_S_REBUILD) +
|
|
g_raid_nsubdisks(vol, G_RAID_SUBDISK_S_RESYNC);
|
|
switch(trs->trso_type) {
|
|
case TR_RAID1E_NONE:
|
|
if (vol->v_state < G_RAID_VOLUME_S_DEGRADED)
|
|
return;
|
|
if (nr == 0) {
|
|
nr = g_raid_nsubdisks(vol, G_RAID_SUBDISK_S_NEW) +
|
|
g_raid_nsubdisks(vol, G_RAID_SUBDISK_S_STALE) +
|
|
g_raid_nsubdisks(vol, G_RAID_SUBDISK_S_UNINITIALIZED);
|
|
if (nr == 0)
|
|
return;
|
|
}
|
|
g_raid_tr_raid1e_rebuild_start(tr);
|
|
break;
|
|
case TR_RAID1E_REBUILD:
|
|
if (vol->v_state < G_RAID_VOLUME_S_DEGRADED || nr == 0 ||
|
|
trs->trso_failed_sd == sd)
|
|
g_raid_tr_raid1e_rebuild_abort(tr);
|
|
break;
|
|
case TR_RAID1E_RESYNC:
|
|
break;
|
|
}
|
|
}
|
|
|
|
static int
|
|
g_raid_tr_event_raid1e(struct g_raid_tr_object *tr,
|
|
struct g_raid_subdisk *sd, u_int event)
|
|
{
|
|
|
|
g_raid_tr_update_state_raid1e(tr->tro_volume, sd);
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
g_raid_tr_start_raid1e(struct g_raid_tr_object *tr)
|
|
{
|
|
struct g_raid_tr_raid1e_object *trs;
|
|
struct g_raid_volume *vol;
|
|
|
|
trs = (struct g_raid_tr_raid1e_object *)tr;
|
|
vol = tr->tro_volume;
|
|
trs->trso_starting = 0;
|
|
g_raid_tr_update_state_raid1e(vol, NULL);
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
g_raid_tr_stop_raid1e(struct g_raid_tr_object *tr)
|
|
{
|
|
struct g_raid_tr_raid1e_object *trs;
|
|
struct g_raid_volume *vol;
|
|
|
|
trs = (struct g_raid_tr_raid1e_object *)tr;
|
|
vol = tr->tro_volume;
|
|
trs->trso_starting = 0;
|
|
trs->trso_stopping = 1;
|
|
g_raid_tr_update_state_raid1e(vol, NULL);
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Select the disk to read from. Take into account: subdisk state, running
|
|
* error recovery, average disk load, head position and possible cache hits.
|
|
*/
|
|
#define ABS(x) (((x) >= 0) ? (x) : (-(x)))
|
|
static int
|
|
g_raid_tr_raid1e_select_read_disk(struct g_raid_volume *vol,
|
|
int no, off_t off, off_t len, u_int mask)
|
|
{
|
|
struct g_raid_subdisk *sd;
|
|
off_t offset;
|
|
int i, best, prio, bestprio;
|
|
|
|
best = -1;
|
|
bestprio = INT_MAX;
|
|
for (i = 0; i < N; i++) {
|
|
sd = &vol->v_subdisks[(no + i) % vol->v_disks_count];
|
|
offset = off;
|
|
if (no + i >= vol->v_disks_count)
|
|
offset += vol->v_strip_size;
|
|
|
|
prio = G_RAID_SUBDISK_LOAD(sd);
|
|
if ((mask & (1 << sd->sd_pos)) != 0)
|
|
continue;
|
|
switch (sd->sd_state) {
|
|
case G_RAID_SUBDISK_S_ACTIVE:
|
|
break;
|
|
case G_RAID_SUBDISK_S_RESYNC:
|
|
if (offset + off < sd->sd_rebuild_pos)
|
|
break;
|
|
/* FALLTHROUGH */
|
|
case G_RAID_SUBDISK_S_STALE:
|
|
prio += i << 24;
|
|
break;
|
|
case G_RAID_SUBDISK_S_REBUILD:
|
|
if (offset + off < sd->sd_rebuild_pos)
|
|
break;
|
|
/* FALLTHROUGH */
|
|
default:
|
|
continue;
|
|
}
|
|
prio += min(sd->sd_recovery, 255) << 16;
|
|
/* If disk head is precisely in position - highly prefer it. */
|
|
if (G_RAID_SUBDISK_POS(sd) == offset)
|
|
prio -= 2 * G_RAID_SUBDISK_LOAD_SCALE;
|
|
else
|
|
/* If disk head is close to position - prefer it. */
|
|
if (ABS(G_RAID_SUBDISK_POS(sd) - offset) <
|
|
G_RAID_SUBDISK_TRACK_SIZE)
|
|
prio -= 1 * G_RAID_SUBDISK_LOAD_SCALE;
|
|
if (prio < bestprio) {
|
|
bestprio = prio;
|
|
best = i;
|
|
}
|
|
}
|
|
return (best);
|
|
}
|
|
|
|
static void
|
|
g_raid_tr_iostart_raid1e_read(struct g_raid_tr_object *tr, struct bio *bp)
|
|
{
|
|
struct g_raid_volume *vol;
|
|
struct g_raid_subdisk *sd;
|
|
struct bio_queue_head queue;
|
|
struct bio *cbp;
|
|
char *addr;
|
|
off_t offset, start, length, remain;
|
|
u_int no, strip_size;
|
|
int best;
|
|
|
|
vol = tr->tro_volume;
|
|
if ((bp->bio_flags & BIO_UNMAPPED) != 0)
|
|
addr = NULL;
|
|
else
|
|
addr = bp->bio_data;
|
|
strip_size = vol->v_strip_size;
|
|
V2P(vol, bp->bio_offset, &no, &offset, &start);
|
|
remain = bp->bio_length;
|
|
bioq_init(&queue);
|
|
while (remain > 0) {
|
|
length = MIN(strip_size - start, remain);
|
|
best = g_raid_tr_raid1e_select_read_disk(vol,
|
|
no, offset, length, 0);
|
|
KASSERT(best >= 0, ("No readable disk in volume %s!",
|
|
vol->v_name));
|
|
no += best;
|
|
if (no >= vol->v_disks_count) {
|
|
no -= vol->v_disks_count;
|
|
offset += strip_size;
|
|
}
|
|
cbp = g_clone_bio(bp);
|
|
if (cbp == NULL)
|
|
goto failure;
|
|
cbp->bio_offset = offset + start;
|
|
cbp->bio_length = length;
|
|
if ((bp->bio_flags & BIO_UNMAPPED) != 0) {
|
|
cbp->bio_ma_offset += (uintptr_t)addr;
|
|
cbp->bio_ma += cbp->bio_ma_offset / PAGE_SIZE;
|
|
cbp->bio_ma_offset %= PAGE_SIZE;
|
|
cbp->bio_ma_n = round_page(cbp->bio_ma_offset +
|
|
cbp->bio_length) / PAGE_SIZE;
|
|
} else
|
|
cbp->bio_data = addr;
|
|
cbp->bio_caller1 = &vol->v_subdisks[no];
|
|
bioq_insert_tail(&queue, cbp);
|
|
no += N - best;
|
|
if (no >= vol->v_disks_count) {
|
|
no -= vol->v_disks_count;
|
|
offset += strip_size;
|
|
}
|
|
remain -= length;
|
|
addr += length;
|
|
start = 0;
|
|
}
|
|
while ((cbp = bioq_takefirst(&queue)) != NULL) {
|
|
sd = cbp->bio_caller1;
|
|
cbp->bio_caller1 = NULL;
|
|
g_raid_subdisk_iostart(sd, cbp);
|
|
}
|
|
return;
|
|
failure:
|
|
while ((cbp = bioq_takefirst(&queue)) != NULL)
|
|
g_destroy_bio(cbp);
|
|
if (bp->bio_error == 0)
|
|
bp->bio_error = ENOMEM;
|
|
g_raid_iodone(bp, bp->bio_error);
|
|
}
|
|
|
|
static void
|
|
g_raid_tr_iostart_raid1e_write(struct g_raid_tr_object *tr, struct bio *bp)
|
|
{
|
|
struct g_raid_volume *vol;
|
|
struct g_raid_subdisk *sd;
|
|
struct bio_queue_head queue;
|
|
struct bio *cbp;
|
|
char *addr;
|
|
off_t offset, start, length, remain;
|
|
u_int no, strip_size;
|
|
int i;
|
|
|
|
vol = tr->tro_volume;
|
|
if ((bp->bio_flags & BIO_UNMAPPED) != 0)
|
|
addr = NULL;
|
|
else
|
|
addr = bp->bio_data;
|
|
strip_size = vol->v_strip_size;
|
|
V2P(vol, bp->bio_offset, &no, &offset, &start);
|
|
remain = bp->bio_length;
|
|
bioq_init(&queue);
|
|
while (remain > 0) {
|
|
length = MIN(strip_size - start, remain);
|
|
for (i = 0; i < N; i++) {
|
|
sd = &vol->v_subdisks[no];
|
|
switch (sd->sd_state) {
|
|
case G_RAID_SUBDISK_S_ACTIVE:
|
|
case G_RAID_SUBDISK_S_STALE:
|
|
case G_RAID_SUBDISK_S_RESYNC:
|
|
break;
|
|
case G_RAID_SUBDISK_S_REBUILD:
|
|
if (offset + start >= sd->sd_rebuild_pos)
|
|
goto nextdisk;
|
|
break;
|
|
default:
|
|
goto nextdisk;
|
|
}
|
|
cbp = g_clone_bio(bp);
|
|
if (cbp == NULL)
|
|
goto failure;
|
|
cbp->bio_offset = offset + start;
|
|
cbp->bio_length = length;
|
|
if ((bp->bio_flags & BIO_UNMAPPED) != 0 &&
|
|
bp->bio_cmd != BIO_DELETE) {
|
|
cbp->bio_ma_offset += (uintptr_t)addr;
|
|
cbp->bio_ma += cbp->bio_ma_offset / PAGE_SIZE;
|
|
cbp->bio_ma_offset %= PAGE_SIZE;
|
|
cbp->bio_ma_n = round_page(cbp->bio_ma_offset +
|
|
cbp->bio_length) / PAGE_SIZE;
|
|
} else
|
|
cbp->bio_data = addr;
|
|
cbp->bio_caller1 = sd;
|
|
bioq_insert_tail(&queue, cbp);
|
|
nextdisk:
|
|
if (++no >= vol->v_disks_count) {
|
|
no = 0;
|
|
offset += strip_size;
|
|
}
|
|
}
|
|
remain -= length;
|
|
if (bp->bio_cmd != BIO_DELETE)
|
|
addr += length;
|
|
start = 0;
|
|
}
|
|
while ((cbp = bioq_takefirst(&queue)) != NULL) {
|
|
sd = cbp->bio_caller1;
|
|
cbp->bio_caller1 = NULL;
|
|
g_raid_subdisk_iostart(sd, cbp);
|
|
}
|
|
return;
|
|
failure:
|
|
while ((cbp = bioq_takefirst(&queue)) != NULL)
|
|
g_destroy_bio(cbp);
|
|
if (bp->bio_error == 0)
|
|
bp->bio_error = ENOMEM;
|
|
g_raid_iodone(bp, bp->bio_error);
|
|
}
|
|
|
|
static void
|
|
g_raid_tr_iostart_raid1e(struct g_raid_tr_object *tr, struct bio *bp)
|
|
{
|
|
struct g_raid_volume *vol;
|
|
struct g_raid_tr_raid1e_object *trs;
|
|
|
|
vol = tr->tro_volume;
|
|
trs = (struct g_raid_tr_raid1e_object *)tr;
|
|
if (vol->v_state != G_RAID_VOLUME_S_OPTIMAL &&
|
|
vol->v_state != G_RAID_VOLUME_S_SUBOPTIMAL &&
|
|
vol->v_state != G_RAID_VOLUME_S_DEGRADED) {
|
|
g_raid_iodone(bp, EIO);
|
|
return;
|
|
}
|
|
/*
|
|
* If we're rebuilding, squeeze in rebuild activity every so often,
|
|
* even when the disk is busy. Be sure to only count real I/O
|
|
* to the disk. All 'SPECIAL' I/O is traffic generated to the disk
|
|
* by this module.
|
|
*/
|
|
if (trs->trso_failed_sd != NULL &&
|
|
!(bp->bio_cflags & G_RAID_BIO_FLAG_SPECIAL)) {
|
|
/* Make this new or running now round short. */
|
|
trs->trso_recover_slabs = 0;
|
|
if (--trs->trso_fair_io <= 0) {
|
|
trs->trso_fair_io = g_raid1e_rebuild_fair_io;
|
|
g_raid_tr_raid1e_rebuild_some(tr);
|
|
}
|
|
}
|
|
switch (bp->bio_cmd) {
|
|
case BIO_READ:
|
|
g_raid_tr_iostart_raid1e_read(tr, bp);
|
|
break;
|
|
case BIO_WRITE:
|
|
case BIO_DELETE:
|
|
g_raid_tr_iostart_raid1e_write(tr, bp);
|
|
break;
|
|
case BIO_FLUSH:
|
|
g_raid_tr_flush_common(tr, bp);
|
|
break;
|
|
default:
|
|
KASSERT(1 == 0, ("Invalid command here: %u (volume=%s)",
|
|
bp->bio_cmd, vol->v_name));
|
|
break;
|
|
}
|
|
}
|
|
|
|
static void
|
|
g_raid_tr_iodone_raid1e(struct g_raid_tr_object *tr,
|
|
struct g_raid_subdisk *sd, struct bio *bp)
|
|
{
|
|
struct bio *cbp;
|
|
struct g_raid_subdisk *nsd;
|
|
struct g_raid_volume *vol;
|
|
struct bio *pbp;
|
|
struct g_raid_tr_raid1e_object *trs;
|
|
off_t virtual, offset, start;
|
|
uintptr_t mask;
|
|
int error, do_write, copy, disk, best;
|
|
|
|
trs = (struct g_raid_tr_raid1e_object *)tr;
|
|
vol = tr->tro_volume;
|
|
if (bp->bio_cflags & G_RAID_BIO_FLAG_SYNC) {
|
|
if (trs->trso_type == TR_RAID1E_REBUILD) {
|
|
nsd = trs->trso_failed_sd;
|
|
if (bp->bio_cmd == BIO_READ) {
|
|
|
|
/* Immediately abort rebuild, if requested. */
|
|
if (trs->trso_flags & TR_RAID1E_F_ABORT) {
|
|
trs->trso_flags &= ~TR_RAID1E_F_DOING_SOME;
|
|
g_raid_tr_raid1e_rebuild_abort(tr);
|
|
return;
|
|
}
|
|
|
|
/* On read error, skip and cross fingers. */
|
|
if (bp->bio_error != 0) {
|
|
G_RAID_LOGREQ(0, bp,
|
|
"Read error during rebuild (%d), "
|
|
"possible data loss!",
|
|
bp->bio_error);
|
|
goto rebuild_round_done;
|
|
}
|
|
|
|
/*
|
|
* The read operation finished, queue the
|
|
* write and get out.
|
|
*/
|
|
G_RAID_LOGREQ(3, bp, "Rebuild read done: %d",
|
|
bp->bio_error);
|
|
bp->bio_cmd = BIO_WRITE;
|
|
bp->bio_cflags = G_RAID_BIO_FLAG_SYNC;
|
|
bp->bio_offset = nsd->sd_rebuild_pos;
|
|
G_RAID_LOGREQ(3, bp, "Queueing rebuild write.");
|
|
g_raid_subdisk_iostart(nsd, bp);
|
|
} else {
|
|
/*
|
|
* The write operation just finished. Do
|
|
* another. We keep cloning the master bio
|
|
* since it has the right buffers allocated to
|
|
* it.
|
|
*/
|
|
G_RAID_LOGREQ(3, bp, "Rebuild write done: %d",
|
|
bp->bio_error);
|
|
if (bp->bio_error != 0 ||
|
|
trs->trso_flags & TR_RAID1E_F_ABORT) {
|
|
if ((trs->trso_flags &
|
|
TR_RAID1E_F_ABORT) == 0) {
|
|
g_raid_tr_raid1e_fail_disk(sd->sd_softc,
|
|
nsd, nsd->sd_disk);
|
|
}
|
|
trs->trso_flags &= ~TR_RAID1E_F_DOING_SOME;
|
|
g_raid_tr_raid1e_rebuild_abort(tr);
|
|
return;
|
|
}
|
|
rebuild_round_done:
|
|
trs->trso_flags &= ~TR_RAID1E_F_LOCKED;
|
|
g_raid_unlock_range(tr->tro_volume,
|
|
trs->trso_lock_pos, trs->trso_lock_len);
|
|
nsd->sd_rebuild_pos += bp->bio_length;
|
|
if (nsd->sd_rebuild_pos >= nsd->sd_size) {
|
|
g_raid_tr_raid1e_rebuild_finish(tr);
|
|
return;
|
|
}
|
|
|
|
/* Abort rebuild if we are stopping */
|
|
if (trs->trso_stopping) {
|
|
trs->trso_flags &= ~TR_RAID1E_F_DOING_SOME;
|
|
g_raid_tr_raid1e_rebuild_abort(tr);
|
|
return;
|
|
}
|
|
|
|
if (--trs->trso_meta_update <= 0) {
|
|
g_raid_write_metadata(vol->v_softc,
|
|
vol, nsd, nsd->sd_disk);
|
|
trs->trso_meta_update =
|
|
g_raid1e_rebuild_meta_update;
|
|
/* Compensate short rebuild I/Os. */
|
|
if ((vol->v_disks_count % N) != 0 &&
|
|
vol->v_strip_size <
|
|
g_raid1e_rebuild_slab) {
|
|
trs->trso_meta_update *=
|
|
g_raid1e_rebuild_slab;
|
|
trs->trso_meta_update /=
|
|
vol->v_strip_size;
|
|
}
|
|
}
|
|
trs->trso_flags &= ~TR_RAID1E_F_DOING_SOME;
|
|
if (--trs->trso_recover_slabs <= 0)
|
|
return;
|
|
/* Run next rebuild iteration. */
|
|
g_raid_tr_raid1e_rebuild_some(tr);
|
|
}
|
|
} else if (trs->trso_type == TR_RAID1E_RESYNC) {
|
|
/*
|
|
* read good sd, read bad sd in parallel. when both
|
|
* done, compare the buffers. write good to the bad
|
|
* if different. do the next bit of work.
|
|
*/
|
|
panic("Somehow, we think we're doing a resync");
|
|
}
|
|
return;
|
|
}
|
|
pbp = bp->bio_parent;
|
|
pbp->bio_inbed++;
|
|
mask = (intptr_t)bp->bio_caller2;
|
|
if (bp->bio_cmd == BIO_READ && bp->bio_error != 0) {
|
|
/*
|
|
* Read failed on first drive. Retry the read error on
|
|
* another disk drive, if available, before erroring out the
|
|
* read.
|
|
*/
|
|
sd->sd_disk->d_read_errs++;
|
|
G_RAID_LOGREQ(0, bp,
|
|
"Read error (%d), %d read errors total",
|
|
bp->bio_error, sd->sd_disk->d_read_errs);
|
|
|
|
/*
|
|
* If there are too many read errors, we move to degraded.
|
|
* XXX Do we want to FAIL the drive (eg, make the user redo
|
|
* everything to get it back in sync), or just degrade the
|
|
* drive, which kicks off a resync?
|
|
*/
|
|
do_write = 0;
|
|
if (sd->sd_disk->d_read_errs > g_raid_read_err_thresh)
|
|
g_raid_tr_raid1e_fail_disk(sd->sd_softc, sd, sd->sd_disk);
|
|
else if (mask == 0)
|
|
do_write = 1;
|
|
|
|
/* Restore what we were doing. */
|
|
P2V(vol, sd->sd_pos, bp->bio_offset, &virtual, ©);
|
|
V2P(vol, virtual, &disk, &offset, &start);
|
|
|
|
/* Find the other disk, and try to do the I/O to it. */
|
|
mask |= 1 << copy;
|
|
best = g_raid_tr_raid1e_select_read_disk(vol,
|
|
disk, offset, start, mask);
|
|
if (best >= 0 && (cbp = g_clone_bio(pbp)) != NULL) {
|
|
disk += best;
|
|
if (disk >= vol->v_disks_count) {
|
|
disk -= vol->v_disks_count;
|
|
offset += vol->v_strip_size;
|
|
}
|
|
cbp->bio_offset = offset + start;
|
|
cbp->bio_length = bp->bio_length;
|
|
cbp->bio_data = bp->bio_data;
|
|
cbp->bio_ma = bp->bio_ma;
|
|
cbp->bio_ma_offset = bp->bio_ma_offset;
|
|
cbp->bio_ma_n = bp->bio_ma_n;
|
|
g_destroy_bio(bp);
|
|
nsd = &vol->v_subdisks[disk];
|
|
G_RAID_LOGREQ(2, cbp, "Retrying read from %d",
|
|
nsd->sd_pos);
|
|
if (do_write)
|
|
mask |= 1 << 31;
|
|
if ((mask & (1U << 31)) != 0)
|
|
sd->sd_recovery++;
|
|
cbp->bio_caller2 = (void *)mask;
|
|
if (do_write) {
|
|
cbp->bio_caller1 = nsd;
|
|
/* Lock callback starts I/O */
|
|
g_raid_lock_range(sd->sd_volume,
|
|
virtual, cbp->bio_length, pbp, cbp);
|
|
} else {
|
|
g_raid_subdisk_iostart(nsd, cbp);
|
|
}
|
|
return;
|
|
}
|
|
/*
|
|
* We can't retry. Return the original error by falling
|
|
* through. This will happen when there's only one good disk.
|
|
* We don't need to fail the raid, since its actual state is
|
|
* based on the state of the subdisks.
|
|
*/
|
|
G_RAID_LOGREQ(2, bp, "Couldn't retry read, failing it");
|
|
}
|
|
if (bp->bio_cmd == BIO_READ &&
|
|
bp->bio_error == 0 &&
|
|
(mask & (1U << 31)) != 0) {
|
|
G_RAID_LOGREQ(3, bp, "Recovered data from other drive");
|
|
|
|
/* Restore what we were doing. */
|
|
P2V(vol, sd->sd_pos, bp->bio_offset, &virtual, ©);
|
|
V2P(vol, virtual, &disk, &offset, &start);
|
|
|
|
/* Find best disk to write. */
|
|
best = g_raid_tr_raid1e_select_read_disk(vol,
|
|
disk, offset, start, ~mask);
|
|
if (best >= 0 && (cbp = g_clone_bio(pbp)) != NULL) {
|
|
disk += best;
|
|
if (disk >= vol->v_disks_count) {
|
|
disk -= vol->v_disks_count;
|
|
offset += vol->v_strip_size;
|
|
}
|
|
cbp->bio_offset = offset + start;
|
|
cbp->bio_cmd = BIO_WRITE;
|
|
cbp->bio_cflags = G_RAID_BIO_FLAG_REMAP;
|
|
cbp->bio_caller2 = (void *)mask;
|
|
g_destroy_bio(bp);
|
|
G_RAID_LOGREQ(2, cbp,
|
|
"Attempting bad sector remap on failing drive.");
|
|
g_raid_subdisk_iostart(&vol->v_subdisks[disk], cbp);
|
|
return;
|
|
}
|
|
}
|
|
if ((mask & (1U << 31)) != 0) {
|
|
/*
|
|
* We're done with a recovery, mark the range as unlocked.
|
|
* For any write errors, we aggressively fail the disk since
|
|
* there was both a READ and a WRITE error at this location.
|
|
* Both types of errors generally indicates the drive is on
|
|
* the verge of total failure anyway. Better to stop trusting
|
|
* it now. However, we need to reset error to 0 in that case
|
|
* because we're not failing the original I/O which succeeded.
|
|
*/
|
|
|
|
/* Restore what we were doing. */
|
|
P2V(vol, sd->sd_pos, bp->bio_offset, &virtual, ©);
|
|
V2P(vol, virtual, &disk, &offset, &start);
|
|
|
|
for (copy = 0; copy < N; copy++) {
|
|
if ((mask & (1 << copy) ) != 0)
|
|
vol->v_subdisks[(disk + copy) %
|
|
vol->v_disks_count].sd_recovery--;
|
|
}
|
|
|
|
if (bp->bio_cmd == BIO_WRITE && bp->bio_error) {
|
|
G_RAID_LOGREQ(0, bp, "Remap write failed: "
|
|
"failing subdisk.");
|
|
g_raid_tr_raid1e_fail_disk(sd->sd_softc, sd, sd->sd_disk);
|
|
bp->bio_error = 0;
|
|
}
|
|
G_RAID_LOGREQ(2, bp, "REMAP done %d.", bp->bio_error);
|
|
g_raid_unlock_range(sd->sd_volume, virtual, bp->bio_length);
|
|
}
|
|
if (pbp->bio_cmd != BIO_READ) {
|
|
if (pbp->bio_inbed == 1 || pbp->bio_error != 0)
|
|
pbp->bio_error = bp->bio_error;
|
|
if (pbp->bio_cmd == BIO_WRITE && bp->bio_error != 0) {
|
|
G_RAID_LOGREQ(0, bp, "Write failed: failing subdisk.");
|
|
g_raid_tr_raid1e_fail_disk(sd->sd_softc, sd, sd->sd_disk);
|
|
}
|
|
error = pbp->bio_error;
|
|
} else
|
|
error = bp->bio_error;
|
|
g_destroy_bio(bp);
|
|
if (pbp->bio_children == pbp->bio_inbed) {
|
|
pbp->bio_completed = pbp->bio_length;
|
|
g_raid_iodone(pbp, error);
|
|
}
|
|
}
|
|
|
|
static int
|
|
g_raid_tr_kerneldump_raid1e(struct g_raid_tr_object *tr,
|
|
void *virtual, vm_offset_t physical, off_t boffset, size_t blength)
|
|
{
|
|
struct g_raid_volume *vol;
|
|
struct g_raid_subdisk *sd;
|
|
struct bio_queue_head queue;
|
|
char *addr;
|
|
off_t offset, start, length, remain;
|
|
u_int no, strip_size;
|
|
int i, error;
|
|
|
|
vol = tr->tro_volume;
|
|
addr = virtual;
|
|
strip_size = vol->v_strip_size;
|
|
V2P(vol, boffset, &no, &offset, &start);
|
|
remain = blength;
|
|
bioq_init(&queue);
|
|
while (remain > 0) {
|
|
length = MIN(strip_size - start, remain);
|
|
for (i = 0; i < N; i++) {
|
|
sd = &vol->v_subdisks[no];
|
|
switch (sd->sd_state) {
|
|
case G_RAID_SUBDISK_S_ACTIVE:
|
|
case G_RAID_SUBDISK_S_STALE:
|
|
case G_RAID_SUBDISK_S_RESYNC:
|
|
break;
|
|
case G_RAID_SUBDISK_S_REBUILD:
|
|
if (offset + start >= sd->sd_rebuild_pos)
|
|
goto nextdisk;
|
|
break;
|
|
default:
|
|
goto nextdisk;
|
|
}
|
|
error = g_raid_subdisk_kerneldump(sd,
|
|
addr, 0, offset + start, length);
|
|
if (error != 0)
|
|
return (error);
|
|
nextdisk:
|
|
if (++no >= vol->v_disks_count) {
|
|
no = 0;
|
|
offset += strip_size;
|
|
}
|
|
}
|
|
remain -= length;
|
|
addr += length;
|
|
start = 0;
|
|
}
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
g_raid_tr_locked_raid1e(struct g_raid_tr_object *tr, void *argp)
|
|
{
|
|
struct bio *bp;
|
|
struct g_raid_subdisk *sd;
|
|
|
|
bp = (struct bio *)argp;
|
|
sd = (struct g_raid_subdisk *)bp->bio_caller1;
|
|
g_raid_subdisk_iostart(sd, bp);
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
g_raid_tr_idle_raid1e(struct g_raid_tr_object *tr)
|
|
{
|
|
struct g_raid_tr_raid1e_object *trs;
|
|
struct g_raid_volume *vol;
|
|
|
|
vol = tr->tro_volume;
|
|
trs = (struct g_raid_tr_raid1e_object *)tr;
|
|
trs->trso_fair_io = g_raid1e_rebuild_fair_io;
|
|
trs->trso_recover_slabs = g_raid1e_rebuild_cluster_idle;
|
|
/* Compensate short rebuild I/Os. */
|
|
if ((vol->v_disks_count % N) != 0 &&
|
|
vol->v_strip_size < g_raid1e_rebuild_slab) {
|
|
trs->trso_recover_slabs *= g_raid1e_rebuild_slab;
|
|
trs->trso_recover_slabs /= vol->v_strip_size;
|
|
}
|
|
if (trs->trso_type == TR_RAID1E_REBUILD)
|
|
g_raid_tr_raid1e_rebuild_some(tr);
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
g_raid_tr_free_raid1e(struct g_raid_tr_object *tr)
|
|
{
|
|
struct g_raid_tr_raid1e_object *trs;
|
|
|
|
trs = (struct g_raid_tr_raid1e_object *)tr;
|
|
|
|
if (trs->trso_buffer != NULL) {
|
|
free(trs->trso_buffer, M_TR_RAID1E);
|
|
trs->trso_buffer = NULL;
|
|
}
|
|
return (0);
|
|
}
|
|
|
|
G_RAID_TR_DECLARE(raid1e, "RAID1E");
|