213 lines
7.7 KiB
C
213 lines
7.7 KiB
C
/* interrupt.c: bottom half of the driver */
|
|
|
|
/*-
|
|
* Copyright (c) 1997, 1998
|
|
* Nan Yang Computer Services Limited. All rights reserved.
|
|
*
|
|
* This software is distributed under the so-called ``Berkeley
|
|
* License'':
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
* 3. All advertising materials mentioning features or use of this software
|
|
* must display the following acknowledgement:
|
|
* This product includes software developed by Nan Yang Computer
|
|
* Services Limited.
|
|
* 4. Neither the name of the Company nor the names of its contributors
|
|
* may be used to endorse or promote products derived from this software
|
|
* without specific prior written permission.
|
|
*
|
|
* This software is provided ``as is'', and any express or implied
|
|
* warranties, including, but not limited to, the implied warranties of
|
|
* merchantability and fitness for a particular purpose are disclaimed.
|
|
* In no event shall the company or contributors be liable for any
|
|
* direct, indirect, incidental, special, exemplary, or consequential
|
|
* damages (including, but not limited to, procurement of substitute
|
|
* goods or services; loss of use, data, or profits; or business
|
|
* interruption) however caused and on any theory of liability, whether
|
|
* in contract, strict liability, or tort (including negligence or
|
|
* otherwise) arising in any way out of the use of this software, even if
|
|
* advised of the possibility of such damage.
|
|
*
|
|
* $Id: vinuminterrupt.c,v 1.4 1999/01/12 04:30:12 grog Exp grog $
|
|
*/
|
|
|
|
#define REALLYKERNEL
|
|
#include "opt_vinum.h"
|
|
#include <dev/vinum/vinumhdr.h>
|
|
#include <dev/vinum/request.h>
|
|
#include <miscfs/specfs/specdev.h>
|
|
#include <sys/resourcevar.h>
|
|
|
|
void complete_raid5_write(struct rqelement *);
|
|
void freerq(struct request *rq);
|
|
void free_rqg(struct rqgroup *rqg);
|
|
void complete_rqe(struct buf *bp);
|
|
void sdio_done(struct buf *bp);
|
|
|
|
/*
|
|
* Take a completed buffer, transfer the data back if
|
|
* it's a read, and complete the high-level request
|
|
* if this is the last subrequest.
|
|
*
|
|
* The bp parameter is in fact a struct rqelement, which
|
|
* includes a couple of extras at the end.
|
|
*/
|
|
void
|
|
complete_rqe(struct buf *bp)
|
|
{
|
|
struct rqelement *rqe;
|
|
struct request *rq;
|
|
struct rqgroup *rqg;
|
|
struct buf *ubp; /* user buffer */
|
|
|
|
rqe = (struct rqelement *) bp; /* point to the element element that completed */
|
|
rqg = rqe->rqg; /* and the request group */
|
|
rq = rqg->rq; /* and the complete request */
|
|
ubp = rq->bp; /* user buffer */
|
|
|
|
#ifdef VINUMDEBUG
|
|
if (debug & DEBUG_LASTREQS)
|
|
logrq(loginfo_iodone, rqe, ubp);
|
|
#endif
|
|
if ((bp->b_flags & B_ERROR) != 0) { /* transfer in error */
|
|
if (bp->b_error != 0) /* did it return a number? */
|
|
rq->error = bp->b_error; /* yes, put it in. */
|
|
else if (rq->error == 0) /* no: do we have one already? */
|
|
rq->error = EIO; /* no: catchall "I/O error" */
|
|
SD[rqe->sdno].lasterror = rq->error;
|
|
if (bp->b_flags & B_READ) {
|
|
log(LOG_ERR, "%s: fatal read I/O error\n", SD[rqe->sdno].name);
|
|
set_sd_state(rqe->sdno, sd_crashed, setstate_force); /* subdisk is crashed */
|
|
} else { /* write operation */
|
|
log(LOG_ERR, "%s: fatal write I/O error\n", SD[rqe->sdno].name);
|
|
set_sd_state(rqe->sdno, sd_stale, setstate_force); /* subdisk is stale */
|
|
}
|
|
if (rq->error == ENXIO) { /* the drive's down too */
|
|
log(LOG_ERR, "%s: fatal drive I/O error\n", DRIVE[rqe->driveno].label.name);
|
|
DRIVE[rqe->driveno].lasterror = rq->error;
|
|
set_drive_state(rqe->driveno, /* take the drive down */
|
|
drive_down,
|
|
setstate_force);
|
|
}
|
|
}
|
|
/* Now update the statistics */
|
|
if (bp->b_flags & B_READ) { /* read operation */
|
|
DRIVE[rqe->driveno].reads++;
|
|
DRIVE[rqe->driveno].bytes_read += bp->b_bcount;
|
|
SD[rqe->sdno].reads++;
|
|
SD[rqe->sdno].bytes_read += bp->b_bcount;
|
|
PLEX[rqe->rqg->plexno].reads++;
|
|
PLEX[rqe->rqg->plexno].bytes_read += bp->b_bcount;
|
|
} else { /* write operation */
|
|
DRIVE[rqe->driveno].writes++;
|
|
DRIVE[rqe->driveno].bytes_written += bp->b_bcount;
|
|
SD[rqe->sdno].writes++;
|
|
SD[rqe->sdno].bytes_written += bp->b_bcount;
|
|
PLEX[rqe->rqg->plexno].writes++;
|
|
PLEX[rqe->rqg->plexno].bytes_written += bp->b_bcount;
|
|
}
|
|
rqg->active--; /* one less request active */
|
|
if (rqg->active == 0) /* request group finished, */
|
|
rq->active--; /* one less */
|
|
if (rq->active == 0) { /* request finished, */
|
|
#if VINUMDEBUG
|
|
if (debug & DEBUG_RESID) {
|
|
if (ubp->b_resid != 0) /* still something to transfer? */
|
|
Debugger("resid");
|
|
|
|
{
|
|
int i;
|
|
for (i = 0; i < ubp->b_bcount; i += 512) /* XXX debug */
|
|
if (((char *) ubp->b_data)[i] != '<') { /* and not what we expected */
|
|
log(LOG_DEBUG,
|
|
"At 0x%x (offset 0x%x): '%c' (0x%x)\n",
|
|
(int) (&((char *) ubp->b_data)[i]),
|
|
i,
|
|
((char *) ubp->b_data)[i],
|
|
((char *) ubp->b_data)[i]);
|
|
Debugger("complete_request checksum");
|
|
}
|
|
}
|
|
}
|
|
#endif
|
|
|
|
if (rq->error) { /* did we have an error? */
|
|
if (rq->isplex) { /* plex operation, */
|
|
ubp->b_flags |= B_ERROR; /* yes, propagate to user */
|
|
ubp->b_error = rq->error;
|
|
} else /* try to recover */
|
|
queue_daemon_request(daemonrq_ioerror, rq); /* let the daemon complete */
|
|
} else {
|
|
ubp->b_resid = 0; /* completed our transfer */
|
|
if (rq->isplex == 0) /* volume request, */
|
|
VOL[rq->volplex.volno].active--; /* another request finished */
|
|
biodone(ubp); /* top level buffer completed */
|
|
freerq(rq); /* return the request storage */
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
/* Free a request block and anything hanging off it */
|
|
void
|
|
freerq(struct request *rq)
|
|
{
|
|
struct rqgroup *rqg;
|
|
struct rqgroup *nrqg; /* next in chain */
|
|
int rqno;
|
|
|
|
for (rqg = rq->rqg; rqg != NULL; rqg = nrqg) { /* through the whole request chain */
|
|
for (rqno = 0; rqno < rqg->count; rqno++)
|
|
if ((rqg->rqe[rqno].flags & XFR_MALLOCED) /* data buffer was malloced, */
|
|
&&rqg->rqe[rqno].b.b_data) /* and the allocation succeeded */
|
|
Free(rqg->rqe[rqno].b.b_data); /* free it */
|
|
nrqg = rqg->next; /* note the next one */
|
|
Free(rqg); /* and free this one */
|
|
}
|
|
Free(rq); /* free the request itself */
|
|
}
|
|
|
|
void
|
|
free_rqg(struct rqgroup *rqg)
|
|
{
|
|
if ((rqg->flags & XFR_GROUPOP) /* RAID 5 request */
|
|
&&(rqg->rqe) /* got a buffer structure */
|
|
&&(rqg->rqe->b.b_data)) /* and it has a buffer allocated */
|
|
Free(rqg->rqe->b.b_data); /* free it */
|
|
}
|
|
|
|
/* I/O on subdisk completed */
|
|
void
|
|
sdio_done(struct buf *bp)
|
|
{
|
|
struct sdbuf *sbp;
|
|
|
|
sbp = (struct sdbuf *) bp;
|
|
if (sbp->b.b_flags & B_ERROR) { /* had an error */
|
|
bp->b_flags |= B_ERROR;
|
|
bp->b_error = sbp->b.b_error;
|
|
}
|
|
bp->b_resid = sbp->b.b_resid;
|
|
biodone(sbp->bp); /* complete the caller's I/O */
|
|
/* Now update the statistics */
|
|
if (bp->b_flags & B_READ) { /* read operation */
|
|
DRIVE[sbp->driveno].reads++;
|
|
DRIVE[sbp->driveno].bytes_read += bp->b_bcount;
|
|
SD[sbp->sdno].reads++;
|
|
SD[sbp->sdno].bytes_read += bp->b_bcount;
|
|
} else { /* write operation */
|
|
DRIVE[sbp->driveno].writes++;
|
|
DRIVE[sbp->driveno].bytes_written += bp->b_bcount;
|
|
SD[sbp->sdno].writes++;
|
|
SD[sbp->sdno].bytes_written += bp->b_bcount;
|
|
}
|
|
Free(sbp);
|
|
}
|