a82e3a8b24
Mainly focus on files that use BSD 2-Clause license, however the tool I was using misidentified many licenses so this was mostly a manual - error prone - task. The Software Package Data Exchange (SPDX) group provides a specification to make it easier for automated tools to detect and summarize well known opensource licenses. We are gradually adopting the specification, noting that the tags are considered only advisory and do not, in any way, superceed or replace the license texts.
338 lines
9.2 KiB
C
338 lines
9.2 KiB
C
/*-
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* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
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*
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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/lock.h>
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#include <sys/malloc.h>
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#include <sys/mutex.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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static MALLOC_DEFINE(M_TR_RAID0, "tr_raid0_data", "GEOM_RAID RAID0 data");
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struct g_raid_tr_raid0_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_stopped;
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};
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static g_raid_tr_taste_t g_raid_tr_taste_raid0;
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static g_raid_tr_event_t g_raid_tr_event_raid0;
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static g_raid_tr_start_t g_raid_tr_start_raid0;
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static g_raid_tr_stop_t g_raid_tr_stop_raid0;
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static g_raid_tr_iostart_t g_raid_tr_iostart_raid0;
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static g_raid_tr_iodone_t g_raid_tr_iodone_raid0;
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static g_raid_tr_kerneldump_t g_raid_tr_kerneldump_raid0;
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static g_raid_tr_free_t g_raid_tr_free_raid0;
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static kobj_method_t g_raid_tr_raid0_methods[] = {
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KOBJMETHOD(g_raid_tr_taste, g_raid_tr_taste_raid0),
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KOBJMETHOD(g_raid_tr_event, g_raid_tr_event_raid0),
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KOBJMETHOD(g_raid_tr_start, g_raid_tr_start_raid0),
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KOBJMETHOD(g_raid_tr_stop, g_raid_tr_stop_raid0),
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KOBJMETHOD(g_raid_tr_iostart, g_raid_tr_iostart_raid0),
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KOBJMETHOD(g_raid_tr_iodone, g_raid_tr_iodone_raid0),
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KOBJMETHOD(g_raid_tr_kerneldump, g_raid_tr_kerneldump_raid0),
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KOBJMETHOD(g_raid_tr_free, g_raid_tr_free_raid0),
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{ 0, 0 }
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};
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static struct g_raid_tr_class g_raid_tr_raid0_class = {
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"RAID0",
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g_raid_tr_raid0_methods,
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sizeof(struct g_raid_tr_raid0_object),
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.trc_enable = 1,
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.trc_priority = 100,
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.trc_accept_unmapped = 1
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};
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static int
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g_raid_tr_taste_raid0(struct g_raid_tr_object *tr, struct g_raid_volume *volume)
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{
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struct g_raid_tr_raid0_object *trs;
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trs = (struct g_raid_tr_raid0_object *)tr;
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if (tr->tro_volume->v_raid_level != G_RAID_VOLUME_RL_RAID0 ||
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tr->tro_volume->v_raid_level_qualifier != G_RAID_VOLUME_RLQ_NONE)
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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_raid0(struct g_raid_volume *vol)
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{
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struct g_raid_tr_raid0_object *trs;
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struct g_raid_softc *sc;
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u_int s;
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int n, f;
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sc = vol->v_softc;
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trs = (struct g_raid_tr_raid0_object *)vol->v_tr;
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if (trs->trso_stopped)
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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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n = g_raid_nsubdisks(vol, G_RAID_SUBDISK_S_ACTIVE);
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f = g_raid_nsubdisks(vol, G_RAID_SUBDISK_S_FAILED);
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if (n + f == vol->v_disks_count) {
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if (f == 0)
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s = G_RAID_VOLUME_S_OPTIMAL;
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else
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s = G_RAID_VOLUME_S_SUBOPTIMAL;
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} else
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s = G_RAID_VOLUME_S_BROKEN;
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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_stopped)
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g_raid_write_metadata(sc, vol, NULL, NULL);
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}
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return (0);
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}
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static int
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g_raid_tr_event_raid0(struct g_raid_tr_object *tr,
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struct g_raid_subdisk *sd, u_int event)
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{
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struct g_raid_tr_raid0_object *trs;
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struct g_raid_softc *sc;
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struct g_raid_volume *vol;
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int state;
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trs = (struct g_raid_tr_raid0_object *)tr;
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vol = tr->tro_volume;
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sc = vol->v_softc;
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state = sd->sd_state;
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if (state != G_RAID_SUBDISK_S_NONE &&
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state != G_RAID_SUBDISK_S_FAILED &&
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state != G_RAID_SUBDISK_S_ACTIVE) {
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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, sd->sd_pos,
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g_raid_subdisk_state2str(sd->sd_state));
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g_raid_change_subdisk_state(sd, G_RAID_SUBDISK_S_ACTIVE);
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}
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if (state != sd->sd_state &&
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!trs->trso_starting && !trs->trso_stopped)
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g_raid_write_metadata(sc, vol, sd, NULL);
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g_raid_tr_update_state_raid0(vol);
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return (0);
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}
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static int
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g_raid_tr_start_raid0(struct g_raid_tr_object *tr)
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{
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struct g_raid_tr_raid0_object *trs;
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struct g_raid_volume *vol;
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trs = (struct g_raid_tr_raid0_object *)tr;
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vol = tr->tro_volume;
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trs->trso_starting = 0;
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g_raid_tr_update_state_raid0(vol);
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return (0);
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}
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static int
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g_raid_tr_stop_raid0(struct g_raid_tr_object *tr)
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{
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struct g_raid_tr_raid0_object *trs;
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struct g_raid_volume *vol;
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trs = (struct g_raid_tr_raid0_object *)tr;
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vol = tr->tro_volume;
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trs->trso_starting = 0;
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trs->trso_stopped = 1;
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g_raid_tr_update_state_raid0(vol);
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return (0);
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}
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static void
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g_raid_tr_iostart_raid0(struct g_raid_tr_object *tr, struct bio *bp)
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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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struct bio_queue_head queue;
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struct bio *cbp;
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char *addr;
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off_t offset, start, length, nstripe, remain;
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u_int no, strip_size;
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vol = tr->tro_volume;
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if (vol->v_state != G_RAID_VOLUME_S_OPTIMAL &&
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vol->v_state != G_RAID_VOLUME_S_SUBOPTIMAL) {
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g_raid_iodone(bp, EIO);
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return;
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}
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if (bp->bio_cmd == BIO_FLUSH) {
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g_raid_tr_flush_common(tr, bp);
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return;
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}
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if ((bp->bio_flags & BIO_UNMAPPED) != 0)
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addr = NULL;
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else
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addr = bp->bio_data;
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strip_size = vol->v_strip_size;
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/* Stripe number. */
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nstripe = bp->bio_offset / strip_size;
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/* Start position in stripe. */
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start = bp->bio_offset % strip_size;
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/* Disk number. */
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no = nstripe % vol->v_disks_count;
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/* Stripe start position in disk. */
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offset = (nstripe / vol->v_disks_count) * strip_size;
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/* Length of data to operate. */
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remain = bp->bio_length;
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bioq_init(&queue);
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do {
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length = MIN(strip_size - start, remain);
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cbp = g_clone_bio(bp);
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if (cbp == NULL)
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goto failure;
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cbp->bio_offset = offset + start;
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cbp->bio_length = length;
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if ((bp->bio_flags & BIO_UNMAPPED) != 0 &&
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bp->bio_cmd != BIO_DELETE) {
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cbp->bio_ma_offset += (uintptr_t)addr;
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cbp->bio_ma += cbp->bio_ma_offset / PAGE_SIZE;
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cbp->bio_ma_offset %= PAGE_SIZE;
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cbp->bio_ma_n = round_page(cbp->bio_ma_offset +
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cbp->bio_length) / PAGE_SIZE;
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} else
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cbp->bio_data = addr;
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cbp->bio_caller1 = &vol->v_subdisks[no];
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bioq_insert_tail(&queue, cbp);
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if (++no >= vol->v_disks_count) {
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no = 0;
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offset += strip_size;
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}
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remain -= length;
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if (bp->bio_cmd != BIO_DELETE)
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addr += length;
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start = 0;
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} while (remain > 0);
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while ((cbp = bioq_takefirst(&queue)) != NULL) {
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sd = cbp->bio_caller1;
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cbp->bio_caller1 = NULL;
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g_raid_subdisk_iostart(sd, cbp);
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}
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return;
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failure:
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while ((cbp = bioq_takefirst(&queue)) != NULL)
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g_destroy_bio(cbp);
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if (bp->bio_error == 0)
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bp->bio_error = ENOMEM;
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g_raid_iodone(bp, bp->bio_error);
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}
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static int
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g_raid_tr_kerneldump_raid0(struct g_raid_tr_object *tr,
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void *virtual, vm_offset_t physical, off_t boffset, size_t blength)
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{
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struct g_raid_volume *vol;
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char *addr;
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off_t offset, start, length, nstripe, remain;
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u_int no, strip_size;
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int error;
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vol = tr->tro_volume;
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if (vol->v_state != G_RAID_VOLUME_S_OPTIMAL)
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return (ENXIO);
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addr = virtual;
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strip_size = vol->v_strip_size;
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/* Stripe number. */
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nstripe = boffset / strip_size;
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/* Start position in stripe. */
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start = boffset % strip_size;
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/* Disk number. */
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no = nstripe % vol->v_disks_count;
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/* Stripe tart position in disk. */
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offset = (nstripe / vol->v_disks_count) * strip_size;
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/* Length of data to operate. */
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remain = blength;
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do {
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length = MIN(strip_size - start, remain);
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error = g_raid_subdisk_kerneldump(&vol->v_subdisks[no],
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addr, 0, offset + start, length);
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if (error != 0)
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return (error);
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if (++no >= vol->v_disks_count) {
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no = 0;
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offset += strip_size;
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}
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remain -= length;
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addr += length;
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start = 0;
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} while (remain > 0);
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return (0);
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}
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static void
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g_raid_tr_iodone_raid0(struct g_raid_tr_object *tr,
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struct g_raid_subdisk *sd,struct bio *bp)
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{
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struct bio *pbp;
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pbp = bp->bio_parent;
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if (pbp->bio_error == 0)
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pbp->bio_error = bp->bio_error;
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g_destroy_bio(bp);
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pbp->bio_inbed++;
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if (pbp->bio_children == pbp->bio_inbed) {
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pbp->bio_completed = pbp->bio_length;
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g_raid_iodone(pbp, bp->bio_error);
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}
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}
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static int
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g_raid_tr_free_raid0(struct g_raid_tr_object *tr)
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{
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return (0);
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}
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G_RAID_TR_DECLARE(raid0, "RAID0");
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