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|
/* $OpenBSD: softraid_concat.c,v 1.2 2012/01/22 11:13:32 jsing Exp $ */
/*
* Copyright (c) 2008 Marco Peereboom <marco@peereboom.us>
* Copyright (c) 2011 Joel Sing <jsing@openbsd.org>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include "bio.h"
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/device.h>
#include <sys/buf.h>
#include <sys/queue.h>
#include <sys/sensors.h>
#include <scsi/scsi_all.h>
#include <scsi/scsiconf.h>
#include <scsi/scsi_disk.h>
#include <dev/softraidvar.h>
/* CONCAT functions. */
int sr_concat_create(struct sr_discipline *, struct bioc_createraid *,
int, int64_t);
int sr_concat_assemble(struct sr_discipline *, struct bioc_createraid *,
int);
int sr_concat_alloc_resources(struct sr_discipline *);
int sr_concat_free_resources(struct sr_discipline *);
int sr_concat_rw(struct sr_workunit *);
void sr_concat_intr(struct buf *);
/* Discipline initialisation. */
void
sr_concat_discipline_init(struct sr_discipline *sd)
{
/* Fill out discipline members. */
sd->sd_type = SR_MD_CONCAT;
sd->sd_capabilities = SR_CAP_SYSTEM_DISK | SR_CAP_AUTO_ASSEMBLE |
SR_CAP_NON_COERCED;
sd->sd_max_wu = SR_CONCAT_NOWU;
/* Setup discipline specific function pointers. */
sd->sd_alloc_resources = sr_concat_alloc_resources;
sd->sd_assemble = sr_concat_assemble;
sd->sd_create = sr_concat_create;
sd->sd_free_resources = sr_concat_free_resources;
sd->sd_scsi_rw = sr_concat_rw;
}
int
sr_concat_create(struct sr_discipline *sd, struct bioc_createraid *bc,
int no_chunk, int64_t coerced_size)
{
int i;
if (no_chunk < 2) {
sr_error(sd->sd_sc, "CONCAT requires two or more chunks");
return EINVAL;
}
strlcpy(sd->sd_name, "CONCAT", sizeof(sd->sd_name));
sd->sd_meta->ssdi.ssd_size = 0;
for (i = 0; i < no_chunk; i++)
sd->sd_meta->ssdi.ssd_size +=
sd->sd_vol.sv_chunks[i]->src_size;
sd->sd_max_ccb_per_wu = SR_CONCAT_NOWU * no_chunk;
return 0;
}
int
sr_concat_assemble(struct sr_discipline *sd, struct bioc_createraid *bc,
int no_chunk)
{
sd->sd_max_ccb_per_wu = SR_CONCAT_NOWU * no_chunk;
return 0;
}
int
sr_concat_alloc_resources(struct sr_discipline *sd)
{
int rv = EINVAL;
if (!sd)
return (rv);
DNPRINTF(SR_D_DIS, "%s: sr_concat_alloc_resources\n",
DEVNAME(sd->sd_sc));
if (sr_wu_alloc(sd))
goto bad;
if (sr_ccb_alloc(sd))
goto bad;
rv = 0;
bad:
return (rv);
}
int
sr_concat_free_resources(struct sr_discipline *sd)
{
int rv = EINVAL;
if (!sd)
return (rv);
DNPRINTF(SR_D_DIS, "%s: sr_concat_free_resources\n",
DEVNAME(sd->sd_sc));
sr_wu_free(sd);
sr_ccb_free(sd);
rv = 0;
return (rv);
}
int
sr_concat_rw(struct sr_workunit *wu)
{
struct sr_discipline *sd = wu->swu_dis;
struct scsi_xfer *xs = wu->swu_xs;
struct sr_ccb *ccb;
struct sr_chunk *scp;
int s;
daddr64_t blk, lbaoffs, chunk, chunksize;
daddr64_t no_chunk, chunkend, physoffs;
daddr64_t length, leftover;
u_int8_t *data;
/* blk and scsi error will be handled by sr_validate_io */
if (sr_validate_io(wu, &blk, "sr_concat_rw"))
goto bad;
no_chunk = sd->sd_meta->ssdi.ssd_chunk_no;
DNPRINTF(SR_D_DIS, "%s: %s: front end io: lba %lld size %d\n",
DEVNAME(sd->sd_sc), sd->sd_meta->ssd_devname,
blk, xs->datalen);
/* All offsets are in bytes. */
lbaoffs = blk << DEV_BSHIFT;
leftover = xs->datalen;
data = xs->data;
for (wu->swu_io_count = 1;; wu->swu_io_count++) {
chunkend = 0;
physoffs = lbaoffs;
for (chunk = 0; chunk < no_chunk; chunk++) {
chunksize = sd->sd_vol.sv_chunks[chunk]->src_size <<
DEV_BSHIFT;
chunkend += chunksize;
if (lbaoffs < chunkend)
break;
physoffs -= chunksize;
}
if (lbaoffs > chunkend)
goto bad;
length = MIN(MIN(leftover, chunkend - lbaoffs), MAXPHYS);
physoffs += sd->sd_meta->ssd_data_offset << DEV_BSHIFT;
/* make sure chunk is online */
scp = sd->sd_vol.sv_chunks[chunk];
if (scp->src_meta.scm_status != BIOC_SDONLINE) {
goto bad;
}
ccb = sr_ccb_get(sd);
if (!ccb) {
/* should never happen but handle more gracefully */
printf("%s: %s: too many ccbs queued\n",
DEVNAME(sd->sd_sc),
sd->sd_meta->ssd_devname);
goto bad;
}
DNPRINTF(SR_D_DIS, "%s: %s concat io: lbaoffs: %lld "
"chunk: %lld chunkend: %lld physoffs: %lld length: %lld "
"leftover: %lld data: %p\n",
DEVNAME(sd->sd_sc), sd->sd_meta->ssd_devname, lbaoffs,
chunk, chunkend, physoffs, length, leftover, data);
ccb->ccb_buf.b_flags = B_CALL | B_PHYS;
ccb->ccb_buf.b_iodone = sr_concat_intr;
ccb->ccb_buf.b_blkno = physoffs >> DEV_BSHIFT;
ccb->ccb_buf.b_bcount = length;
ccb->ccb_buf.b_bufsize = length;
ccb->ccb_buf.b_resid = length;
ccb->ccb_buf.b_data = data;
ccb->ccb_buf.b_error = 0;
ccb->ccb_buf.b_proc = curproc;
ccb->ccb_buf.b_bq = NULL;
ccb->ccb_wu = wu;
ccb->ccb_buf.b_flags |= xs->flags & SCSI_DATA_IN ?
B_READ : B_WRITE;
ccb->ccb_target = chunk;
ccb->ccb_buf.b_dev = sd->sd_vol.sv_chunks[chunk]->src_dev_mm;
ccb->ccb_buf.b_vp = sd->sd_vol.sv_chunks[chunk]->src_vn;
if ((ccb->ccb_buf.b_flags & B_READ) == 0)
ccb->ccb_buf.b_vp->v_numoutput++;
LIST_INIT(&ccb->ccb_buf.b_dep);
TAILQ_INSERT_TAIL(&wu->swu_ccb, ccb, ccb_link);
DNPRINTF(SR_D_DIS, "%s: %s: sr_concat: b_bcount: %d "
"b_blkno: %lld b_flags 0x%0x b_data %p\n",
DEVNAME(sd->sd_sc), sd->sd_meta->ssd_devname,
ccb->ccb_buf.b_bcount, ccb->ccb_buf.b_blkno,
ccb->ccb_buf.b_flags, ccb->ccb_buf.b_data);
leftover -= length;
if (leftover == 0)
break;
data += length;
lbaoffs += length;
}
s = splbio();
if (!sr_check_io_collision(wu))
sr_raid_startwu(wu);
splx(s);
return (0);
bad:
/* wu is unwound by sr_wu_put */
return (1);
}
void
sr_concat_intr(struct buf *bp)
{
struct sr_ccb *ccb = (struct sr_ccb *)bp;
struct sr_workunit *wu = ccb->ccb_wu, *wup;
struct sr_discipline *sd = wu->swu_dis;
struct scsi_xfer *xs = wu->swu_xs;
struct sr_softc *sc = sd->sd_sc;
int s, pend;
DNPRINTF(SR_D_INTR, "%s: sr_intr bp %x xs %x\n",
DEVNAME(sc), bp, xs);
DNPRINTF(SR_D_INTR, "%s: sr_intr: b_bcount: %d b_resid: %d"
" b_flags: 0x%0x block: %lld target: %d\n", DEVNAME(sc),
ccb->ccb_buf.b_bcount, ccb->ccb_buf.b_resid, ccb->ccb_buf.b_flags,
ccb->ccb_buf.b_blkno, ccb->ccb_target);
s = splbio();
if (ccb->ccb_buf.b_flags & B_ERROR) {
printf("%s: i/o error on block %lld target: %d b_error: %d\n",
DEVNAME(sc), ccb->ccb_buf.b_blkno, ccb->ccb_target,
ccb->ccb_buf.b_error);
DNPRINTF(SR_D_INTR, "%s: i/o error on block %lld target: %d\n",
DEVNAME(sc), ccb->ccb_buf.b_blkno, ccb->ccb_target);
wu->swu_ios_failed++;
ccb->ccb_state = SR_CCB_FAILED;
if (ccb->ccb_target != -1)
sd->sd_set_chunk_state(sd, ccb->ccb_target,
BIOC_SDOFFLINE);
else
panic("%s: invalid target on wu: %p", DEVNAME(sc), wu);
} else {
ccb->ccb_state = SR_CCB_OK;
wu->swu_ios_succeeded++;
}
wu->swu_ios_complete++;
DNPRINTF(SR_D_INTR, "%s: sr_intr: comp: %d count: %d failed: %d\n",
DEVNAME(sc), wu->swu_ios_complete, wu->swu_io_count,
wu->swu_ios_failed);
if (wu->swu_ios_complete >= wu->swu_io_count) {
if (wu->swu_ios_failed)
goto bad;
xs->error = XS_NOERROR;
xs->resid = 0;
pend = 0;
TAILQ_FOREACH(wup, &sd->sd_wu_pendq, swu_link) {
if (wu == wup) {
/* wu on pendq, remove */
TAILQ_REMOVE(&sd->sd_wu_pendq, wu, swu_link);
pend = 1;
if (wu->swu_collider) {
/* restart deferred wu */
wu->swu_collider->swu_state =
SR_WU_INPROGRESS;
TAILQ_REMOVE(&sd->sd_wu_defq,
wu->swu_collider, swu_link);
sr_raid_startwu(wu->swu_collider);
}
break;
}
}
if (!pend)
printf("%s: wu: %p not on pending queue\n",
DEVNAME(sc), wu);
sr_scsi_done(sd, xs);
if (sd->sd_sync && sd->sd_wu_pending == 0)
wakeup(sd);
}
splx(s);
return;
bad:
xs->error = XS_DRIVER_STUFFUP;
sr_scsi_done(sd, xs);
splx(s);
}
|
