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Change the style of revive: revive subdisks instead of plexes. This
makes it easier to keep track of which parts of a plex need reviving. Use sdio, not vinumstrategy, to write to the subdisk.
This commit is contained in:
Greg Lehey
parent
7d077233f8
commit
2178c45997
Notes:
svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=42940
@ -33,7 +33,7 @@
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* otherwise) arising in any way out of the use of this software, even if
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* advised of the possibility of such damage.
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*
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* $Id: vinumrevive.c,v 1.6 1998/12/28 16:28:23 peter Exp $
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* $Id: vinumrevive.c,v 1.6 1999/01/17 06:20:44 grog Exp grog $
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*/
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#define REALLYKERNEL
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@ -41,87 +41,138 @@
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#include <dev/vinum/vinumhdr.h>
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#include <dev/vinum/request.h>
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/* revive a block of a plex. Return an error
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/* revive a block of a subdisk. Return an error
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* indication. EAGAIN means successful copy, but
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* that more blocks remain to be copied.
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* that more blocks remain to be copied. EINVAL means
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* that the subdisk isn't associated with a plex (which
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* means a programming error if we get here at all;
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* FIXME)
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* XXX We should specify a block size here. At the moment,
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* just take a default value. FIXME */
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int
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revive_block(int plexno)
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revive_block(int sdno)
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{
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struct plex *plex = &PLEX[plexno];
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struct sd *sd;
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struct plex *plex;
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struct volume *vol;
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struct buf *bp;
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int error = EAGAIN;
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int size; /* size of revive block, bytes */
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int s; /* priority level */
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daddr_t plexblkno; /* lblkno in plex */
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if (plex->revive_blocksize == 0) {
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plexblkno = 0; /* to keep the compiler happy */
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sd = &SD[sdno];
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if (sd->plexno < 0) /* no plex? */
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return EINVAL;
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plex = &PLEX[sd->plexno]; /* point to plex */
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if (plex->volno >= 0)
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vol = &VOL[plex->volno];
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else
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vol = NULL;
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if (sd->revive_blocksize == 0) {
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if (plex->stripesize != 0) /* we're striped, don't revive more than */
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plex->revive_blocksize = min(DEFAULT_REVIVE_BLOCKSIZE, /* one block at a time */
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sd->revive_blocksize = min(DEFAULT_REVIVE_BLOCKSIZE, /* one block at a time */
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plex->stripesize << DEV_BSHIFT);
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else
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plex->revive_blocksize = DEFAULT_REVIVE_BLOCKSIZE;
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sd->revive_blocksize = DEFAULT_REVIVE_BLOCKSIZE;
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}
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size = min(plex->revive_blocksize >> DEV_BSHIFT, plex->length - plex->revived) << DEV_BSHIFT;
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size = min(sd->revive_blocksize >> DEV_BSHIFT, sd->sectors - sd->revived) << DEV_BSHIFT;
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s = splbio();
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/* Get a buffer */
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bp = geteblk(size);
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bp = geteblk(size); /* Get a buffer */
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if (bp == NULL) {
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splx(s);
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return ENOMEM;
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}
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if (bp->b_qindex != 0) /* on a queue, */
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bremfree(bp); /* remove it */
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bremfree(bp); /* remove it XXX how can this happen? */
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splx(s);
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/* Amount to transfer: block size, unless it
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* would overlap the end */
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bp->b_bufsize = size;
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bp->b_bcount = bp->b_bufsize;
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bp->b_resid = 0x0;
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bp->b_blkno = plex->revived; /* we've got this far */
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bp->b_resid = 0;
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/* XXX what about reviving anonymous plexes? */
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/* Now decide where to read from */
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/* First, read the data from the volume. We don't
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* care which plex, that's bre's job */
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bp->b_dev = VINUMBDEV(plex->volno, 0, 0, VINUM_VOLUME_TYPE); /* create the device number */
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bp->b_flags = B_BUSY | B_READ;
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vinumstart(bp, 1);
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biowait(bp);
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switch (plex->organization) {
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daddr_t stripeoffset; /* offset in stripe */
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case plex_concat:
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plexblkno = sd->revived + sd->plexoffset; /* corresponding address in plex */
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break;
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case plex_striped:
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stripeoffset = sd->revived % plex->stripesize; /* offset from beginning of stripe */
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plexblkno = sd->plexoffset /* base */
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+ (sd->revived - stripeoffset) * plex->subdisks /* offset to beginning of stripe */
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+ sd->revived % plex->stripesize; /* offset from beginning of stripe */
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break;
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case plex_raid5:
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case plex_disorg: /* to keep the compiler happy */
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}
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{
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bp->b_blkno = plexblkno; /* start here */
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if (vol != NULL) /* it's part of a volume, */
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/* First, read the data from the volume. We don't
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* care which plex, that's bre's job */
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bp->b_dev = VINUMBDEV(plex->volno, 0, 0, VINUM_VOLUME_TYPE); /* create the device number */
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else /* it's an unattached plex */
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bp->b_dev = VINUMRBDEV(sd->plexno, VINUM_RAWPLEX_TYPE); /* create the device number */
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bp->b_flags = B_BUSY | B_READ; /* either way, read it */
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vinumstart(bp, 1);
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biowait(bp);
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}
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if (bp->b_flags & B_ERROR)
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error = bp->b_error;
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else
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/* Now write to the plex */
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/* Now write to the subdisk */
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{
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s = splbio();
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if (bp->b_qindex != 0) /* on a queue, */
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bremfree(bp); /* remove it */
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splx(s);
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bp->b_dev = VINUMBDEV(plex->volno, plex->volplexno, 0, VINUM_PLEX_TYPE); /* create the device number */
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bp->b_flags = B_BUSY; /* make this a write */
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bp->b_dev = VINUMRBDEV(sdno, VINUM_RAWSD_TYPE); /* create the device number */
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bp->b_flags = B_BUSY | B_ORDERED; /* and make this an ordered write */
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bp->b_resid = 0x0;
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vinumstart(bp, 1);
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bp->b_blkno = sd->revived; /* write it to here */
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sdio(bp); /* perform the I/O */
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biowait(bp);
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if (bp->b_flags & B_ERROR)
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error = bp->b_error;
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else {
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plex->revived += bp->b_bcount >> DEV_BSHIFT; /* moved this much further down */
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if (plex->revived >= plex->length) { /* finished */
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plex->revived = 0;
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plex->state = plex_up; /* do we need to do more? */
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if (plex->volno >= 0) /* we have a volume, */
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set_volume_state(plex->volno, volume_up, 0);
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printf("vinum: plex %s is %s\n", plex->name, plex_state(plex->state));
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sd->revived += bp->b_bcount >> DEV_BSHIFT; /* moved this much further down */
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if (sd->revived >= sd->sectors) { /* finished */
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sd->revived = 0;
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set_sd_state(sdno, sd_up, setstate_force); /* bring the sd up */
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printf("vinum: %s is %s\n", sd->name, sd_state(sd->state));
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save_config(); /* and save the updated configuration */
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error = 0; /* we're done */
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}
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}
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while (plex->waitlist) { /* we have waiting requests */
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launch_requests(plex->waitlist, 1); /* do them now */
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plex->waitlist = plex->waitlist->next; /* and move on to the next */
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while (sd->waitlist) { /* we have waiting requests */
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#if VINUMDEBUG
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struct request *rq = sd->waitlist;
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if (debug & DEBUG_REVIVECONFLICT)
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printf("Relaunch revive conflict sd %d: %x\n%s dev 0x%x, offset 0x%x, length %ld\n",
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rq->sdno,
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(u_int) rq,
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rq->bp->b_flags & B_READ ? "Read" : "Write",
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rq->bp->b_dev,
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rq->bp->b_blkno,
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rq->bp->b_bcount);
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#endif
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launch_requests(sd->waitlist, 1); /* do them now */
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sd->waitlist = sd->waitlist->next; /* and move on to the next */
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}
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}
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if (bp->b_qindex == 0) /* not on a queue, */
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