diff options
Diffstat (limited to 'sys/dev/vinum')
| -rw-r--r-- | sys/dev/vinum/vinumrequest.c | 36 |
1 files changed, 23 insertions, 13 deletions
diff --git a/sys/dev/vinum/vinumrequest.c b/sys/dev/vinum/vinumrequest.c index fad2f38..af8147b 100644 --- a/sys/dev/vinum/vinumrequest.c +++ b/sys/dev/vinum/vinumrequest.c @@ -168,14 +168,13 @@ vinumstrategy(struct bio *biop) } /* - * Start a transfer. Return -1 on error, - * 0 if OK, 1 if we need to retry. - * Parameter reviveok is set when doing - * transfers for revives: it allows transfers to - * be started immediately when a revive is in - * progress. During revive, normal transfers - * are queued if they share address space with - * a currently active revive operation. + * Start a transfer. Return -1 on error, 0 if OK, + * 1 if we need to retry. Parameter reviveok is + * set when doing transfers for revives: it allows + * transfers to be started immediately when a + * revive is in progress. During revive, normal + * transfers are queued if they share address + * space with a currently active revive operation. */ int vinumstart(struct buf *bp, int reviveok) @@ -209,7 +208,7 @@ vinumstart(struct buf *bp, int reviveok) /* * Note the volume ID. This can be NULL, which * the request building functions use as an - * indication for single plex I/O + * indication for single plex I/O. */ rq->bp = bp; /* and the user buffer struct */ @@ -269,9 +268,16 @@ vinumstart(struct buf *bp, int reviveok) * a RAID-4 or RAID-5 plex, we must also update the parity stripe. */ { - if (vol != NULL) - status = build_write_request(rq); /* Not all the subdisks are up */ - else { /* plex I/O */ + if (vol != NULL) { + if ((vol->plexes > 0) /* multiple plex */ + ||(isparity((&PLEX[vol->plex[0]])))) { /* or RAID-[45], */ + rq->save_data = bp->b_data; /* save the data buffer address */ + bp->b_data = Malloc(bp->b_bufsize); + bcopy(rq->save_data, bp->b_data, bp->b_bufsize); /* make a copy */ + rq->flags |= XFR_COPYBUF; /* and note that we did it */ + } + status = build_write_request(rq); + } else { /* plex I/O */ daddr_t diskstart; diskstart = bp->b_blkno; /* start offset of transfer */ @@ -285,6 +291,10 @@ vinumstart(struct buf *bp, int reviveok) bp->b_error = EIO; /* I/O error */ bp->b_io.bio_flags |= BIO_ERROR; } + if (rq->flags & XFR_COPYBUF) { + Free(bp->b_data); + bp->b_data = rq->save_data; + } bufdone(bp); freerq(rq); return -1; @@ -1005,7 +1015,7 @@ vinum_bounds_check(struct buf *bp, struct volume *vol) && bp->b_blkno + size > LABELSECTOR /* and finishes after */ #endif && (!(vol->flags & VF_RAW)) /* and it's not raw */ -&&(bp->b_iocmd == BIO_WRITE) /* and it's a write */ + &&(bp->b_iocmd == BIO_WRITE) /* and it's a write */ &&(!vol->flags & (VF_WLABEL | VF_LABELLING))) { /* and we're not allowed to write the label */ bp->b_error = EROFS; /* read-only */ bp->b_io.bio_flags |= BIO_ERROR; |
