Use the new-born BIO_CMD1 instead of fudging a bio_flag value for reading
the sector ID. Based on numerous comments made by Bruce, rewrite a good part of the old fdformat() function, and merge it with fdreadid() into a single unified fdmisccmd() function. Various style and a couple of more serious bugs fixed there. While i was at it, i also fixed the long-standing "TODO: don't allocate buffer on stack." in fdcioctl(), fixed a number of style bugs there, and finally implemented the FD_DEBUG ioctl command that has been advertised in <sys/fdcio.h> (formerly <machine/ioctl_fd.h>) for almost seven years now. ;-) Submitted by: bde (a lot of fixes for fdformat())
This commit is contained in:
Joerg Wunsch
parent
323fed60a5
commit
f664aeee49
@ -121,7 +121,7 @@
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#define FD_360in5_25 16
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#define FD_640in5_25 17
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#define BIO_RDSECTID BIO_FLAG1
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#define BIO_RDSECTID BIO_CMD1
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static struct fd_type fd_types[NUMTYPES] =
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{
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@ -215,8 +215,7 @@ static timeout_t fd_iotimeout;
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static timeout_t fd_pseudointr;
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static int fdstate(struct fdc_data *);
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static int retrier(struct fdc_data *);
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static int fdformat(dev_t, struct fd_formb *, struct proc *);
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static int fdreadid(dev_t, struct fdc_readid *);
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static int fdmisccmd(dev_t, u_int, void *);
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static int enable_fifo(fdc_p fdc);
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static void fd_clone (void *arg, char *name, int namelen, dev_t *dev);
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@ -1497,7 +1496,7 @@ fdstrategy(struct bio *bp)
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goto bad;
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}
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fdblk = 128 << (fd->ft->secsize);
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if (bp->bio_cmd != BIO_FORMAT && (bp->bio_flags & BIO_RDSECTID) == 0) {
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if (bp->bio_cmd != BIO_FORMAT && bp->bio_cmd != BIO_RDSECTID) {
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if (bp->bio_blkno < 0) {
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printf(
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"fd%d: fdstrat: bad request blkno = %lu, bcount = %ld\n",
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@ -1712,7 +1711,7 @@ fdstate(fdc_p fdc)
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else
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idf = ISADMA_WRITE;
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format = bp->bio_cmd == BIO_FORMAT;
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rdsectid = bp->bio_flags & BIO_RDSECTID;
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rdsectid = bp->bio_cmd == BIO_RDSECTID;
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if (format) {
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finfo = (struct fd_formb *)bp->bio_data;
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fd->skip = (char *)&(finfo->fd_formb_cylno(0))
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@ -2253,147 +2252,90 @@ fdbiodone(struct bio *bp)
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}
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static int
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fdformat(dev_t dev, struct fd_formb *finfo, struct proc *p)
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fdmisccmd(dev_t dev, u_int cmd, void *data)
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{
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fdu_t fdu;
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fd_p fd;
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fdu_t fdu;
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fd_p fd;
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struct bio *bp;
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int rv = 0, s;
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struct fd_formb *finfo;
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struct fdc_readid *idfield;
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size_t fdblk;
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fdu = FDUNIT(minor(dev));
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fd = devclass_get_softc(fd_devclass, fdu);
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fdu = FDUNIT(minor(dev));
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fd = devclass_get_softc(fd_devclass, fdu);
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fdblk = 128 << fd->ft->secsize;
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finfo = (struct fd_formb *)data;
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idfield = (struct fdc_readid *)data;
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/* set up a buffer header for fdstrategy() */
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bp = (struct bio *)malloc(sizeof(struct bio), M_TEMP, M_NOWAIT);
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if(bp == 0)
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return ENOMEM;
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/*
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* keep the process from being swapped
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*/
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PHOLD(p);
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bzero((void *)bp, sizeof(*bp));
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bp->bio_cmd = BIO_FORMAT;
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bp = malloc(sizeof(struct bio), M_TEMP, M_ZERO | M_NOWAIT);
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if (bp == 0)
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return (ENOMEM);
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/*
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* calculate a fake blkno, so fdstrategy() would initiate a
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* seek to the requested cylinder
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* Set up a bio request for fdstrategy(). bio_blkno is faked
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* so that fdstrategy() will seek to the the requested
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* cylinder, and use the desired head. Since we are not
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* interested in bioqdisksort() munging with our faked bio
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* request, we mark it as being an ordered request.
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*/
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bp->bio_blkno = (finfo->cyl * (fd->ft->sectrac * fd->ft->heads)
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+ finfo->head * fd->ft->sectrac) * fdblk / DEV_BSIZE;
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bp->bio_bcount = sizeof(struct fd_idfield_data) * finfo->fd_formb_nsecs;
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bp->bio_data = (caddr_t)finfo;
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/* now do the format */
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bp->bio_cmd = cmd;
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if (cmd == BIO_FORMAT) {
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bp->bio_blkno =
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(finfo->cyl * (fd->ft->sectrac * fd->ft->heads) +
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finfo->head * fd->ft->sectrac) *
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fdblk / DEV_BSIZE;
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bp->bio_bcount = sizeof(struct fd_idfield_data) *
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finfo->fd_formb_nsecs;
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} else if (cmd == BIO_RDSECTID) {
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bp->bio_blkno =
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(idfield->cyl * (fd->ft->sectrac * fd->ft->heads) +
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idfield->head * fd->ft->sectrac) *
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fdblk / DEV_BSIZE;
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bp->bio_bcount = sizeof(struct fdc_readid);
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} else
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panic("wrong cmd in fdmisccmd()");
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bp->bio_data = data;
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bp->bio_dev = dev;
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bp->bio_done = fdbiodone;
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fdstrategy(bp);
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/* ...and wait for it to complete */
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s = splbio();
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while(!(bp->bio_flags & BIO_DONE)) {
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rv = tsleep((caddr_t)bp, PRIBIO, "fdform", 20 * hz);
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if (rv == EWOULDBLOCK)
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break;
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}
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splx(s);
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if (rv == EWOULDBLOCK) {
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/* timed out */
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rv = EIO;
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device_unbusy(fd->dev);
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}
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if (bp->bio_flags & BIO_ERROR)
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rv = bp->bio_error;
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/*
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* allow the process to be swapped
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*/
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PRELE(p);
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free(bp, M_TEMP);
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return rv;
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}
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static int
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fdreadid(dev_t dev, struct fdc_readid *idfield)
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{
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fdu_t fdu;
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fd_p fd;
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struct bio *bp;
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int rv = 0, s;
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size_t fdblk;
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fdu = FDUNIT(minor(dev));
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fd = devclass_get_softc(fd_devclass, fdu);
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fdblk = 128 << fd->ft->secsize;
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/* set up a buffer header for fdstrategy() */
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bp = (struct bio *)malloc(sizeof(struct bio), M_TEMP, M_NOWAIT);
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if(bp == 0)
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return ENOMEM;
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bzero((void *)bp, sizeof(*bp));
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bp->bio_cmd = BIO_READ;
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bp->bio_flags |= BIO_RDSECTID;
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bp->bio_flags = BIO_ORDERED;
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/*
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* calculate a fake blkno, so fdstrategy() would initiate a
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* seek to the requested cylinder
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* Now run the cmd. The wait loop is a version of bufwait()
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* adapted for struct bio instead of struct buf and
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* specialized for the current context.
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*/
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bp->bio_blkno = (idfield->cyl * (fd->ft->sectrac * fd->ft->heads)
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+ idfield->head * fd->ft->sectrac) * fdblk / DEV_BSIZE;
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bp->bio_bcount = sizeof(struct fdc_readid);
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bp->bio_data = (caddr_t)idfield;
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bp->bio_dev = dev;
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bp->bio_done = fdbiodone;
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fdstrategy(bp);
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while((bp->bio_flags & BIO_DONE) == 0)
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tsleep(bp, PRIBIO, "fdcmd", 0);
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/* ...and wait for it to complete */
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s = splbio();
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while(!(bp->bio_flags & BIO_DONE)) {
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rv = tsleep((caddr_t)bp, PRIBIO, "fdrdid", 10 * hz);
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if (rv == EWOULDBLOCK)
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break;
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}
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splx(s);
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if (rv == EWOULDBLOCK) {
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/* timed out */
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rv = EIO;
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device_unbusy(fd->dev);
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}
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if (bp->bio_flags & BIO_ERROR)
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rv = bp->bio_error;
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free(bp, M_TEMP);
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return rv;
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return (bp->bio_flags & BIO_ERROR ? bp->bio_error : 0);
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}
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/*
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* TODO: don't allocate buffer on stack.
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*/
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static int
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fdioctl(dev_t dev, u_long cmd, caddr_t addr, int flag, struct proc *p)
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{
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fdu_t fdu = FDUNIT(minor(dev));
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fd_p fd = devclass_get_softc(fd_devclass, fdu);
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size_t fdblk;
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fdu_t fdu;
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fd_p fd;
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struct fd_type *fdt;
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struct disklabel *dl;
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struct fdc_status *fsp;
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struct fdc_readid *rid;
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char buffer[DEV_BSIZE];
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char *buffer;
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size_t fdblk;
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int error = 0;
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fdu = FDUNIT(minor(dev));
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fd = devclass_get_softc(fd_devclass, fdu);
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fdblk = 128 << fd->ft->secsize;
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switch (cmd) {
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case DIOCGDINFO:
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bzero(buffer, sizeof (buffer));
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buffer = malloc(DEV_BSIZE, M_TEMP, M_ZERO | M_NOWAIT);
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if (buffer == 0) {
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error = ENOMEM;
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break;
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}
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dl = (struct disklabel *)buffer;
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dl->d_secsize = fdblk;
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fdt = fd->ft;
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@ -2407,6 +2349,7 @@ fdioctl(dev_t dev, u_long cmd, caddr_t addr, int flag, struct proc *p)
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error = EINVAL;
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*(struct disklabel *)addr = *dl;
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free(buffer, M_TEMP);
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break;
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case DIOCSDINFO:
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@ -2427,12 +2370,19 @@ fdioctl(dev_t dev, u_long cmd, caddr_t addr, int flag, struct proc *p)
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dl = (struct disklabel *)addr;
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buffer = malloc(DEV_BSIZE, M_TEMP, M_ZERO | M_NOWAIT);
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if (buffer == 0) {
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error = ENOMEM;
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break;
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}
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if ((error = setdisklabel((struct disklabel *)buffer, dl,
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(u_long)0)) != 0)
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break;
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error = writedisklabel(dev, (struct disklabel *)buffer);
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free(buffer, M_TEMP);
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break;
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case FD_FORM:
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if ((flag & FWRITE) == 0)
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error = EBADF; /* must be opened for writing */
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@ -2440,7 +2390,7 @@ fdioctl(dev_t dev, u_long cmd, caddr_t addr, int flag, struct proc *p)
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FD_FORMAT_VERSION)
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error = EINVAL; /* wrong version of formatting prog */
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else
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error = fdformat(dev, (struct fd_formb *)addr, p);
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error = fdmisccmd(dev, BIO_FORMAT, addr);
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break;
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case FD_GTYPE: /* get drive type */
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@ -2462,6 +2412,12 @@ fdioctl(dev_t dev, u_long cmd, caddr_t addr, int flag, struct proc *p)
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fd->options = *(int *)addr;
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break;
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#ifdef FDC_DEBUG
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case FD_DEBUG:
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fd_debug = *(int *)addr;
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break;
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#endif
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case FD_CLRERR:
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if (suser(p) != 0)
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return EPERM;
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@ -2479,7 +2435,7 @@ fdioctl(dev_t dev, u_long cmd, caddr_t addr, int flag, struct proc *p)
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rid = (struct fdc_readid *)addr;
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if (rid->cyl > MAX_CYLINDER || rid->head > MAX_HEAD)
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return EINVAL;
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error = fdreadid(dev, rid);
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error = fdmisccmd(dev, BIO_RDSECTID, addr);
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break;
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default:
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188
sys/isa/fd.c
188
sys/isa/fd.c
@ -121,7 +121,7 @@
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#define FD_360in5_25 16
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#define FD_640in5_25 17
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#define BIO_RDSECTID BIO_FLAG1
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#define BIO_RDSECTID BIO_CMD1
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static struct fd_type fd_types[NUMTYPES] =
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{
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@ -215,8 +215,7 @@ static timeout_t fd_iotimeout;
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static timeout_t fd_pseudointr;
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static int fdstate(struct fdc_data *);
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static int retrier(struct fdc_data *);
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static int fdformat(dev_t, struct fd_formb *, struct proc *);
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static int fdreadid(dev_t, struct fdc_readid *);
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static int fdmisccmd(dev_t, u_int, void *);
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static int enable_fifo(fdc_p fdc);
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static void fd_clone (void *arg, char *name, int namelen, dev_t *dev);
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@ -1497,7 +1496,7 @@ fdstrategy(struct bio *bp)
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goto bad;
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}
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fdblk = 128 << (fd->ft->secsize);
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if (bp->bio_cmd != BIO_FORMAT && (bp->bio_flags & BIO_RDSECTID) == 0) {
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if (bp->bio_cmd != BIO_FORMAT && bp->bio_cmd != BIO_RDSECTID) {
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if (bp->bio_blkno < 0) {
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printf(
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"fd%d: fdstrat: bad request blkno = %lu, bcount = %ld\n",
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@ -1712,7 +1711,7 @@ fdstate(fdc_p fdc)
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else
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idf = ISADMA_WRITE;
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format = bp->bio_cmd == BIO_FORMAT;
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rdsectid = bp->bio_flags & BIO_RDSECTID;
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rdsectid = bp->bio_cmd == BIO_RDSECTID;
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if (format) {
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finfo = (struct fd_formb *)bp->bio_data;
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fd->skip = (char *)&(finfo->fd_formb_cylno(0))
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@ -2253,147 +2252,90 @@ fdbiodone(struct bio *bp)
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}
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static int
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fdformat(dev_t dev, struct fd_formb *finfo, struct proc *p)
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fdmisccmd(dev_t dev, u_int cmd, void *data)
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{
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fdu_t fdu;
|
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fd_p fd;
|
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|
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fdu_t fdu;
|
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fd_p fd;
|
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struct bio *bp;
|
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int rv = 0, s;
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struct fd_formb *finfo;
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struct fdc_readid *idfield;
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size_t fdblk;
|
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|
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fdu = FDUNIT(minor(dev));
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fd = devclass_get_softc(fd_devclass, fdu);
|
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fdu = FDUNIT(minor(dev));
|
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fd = devclass_get_softc(fd_devclass, fdu);
|
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fdblk = 128 << fd->ft->secsize;
|
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finfo = (struct fd_formb *)data;
|
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idfield = (struct fdc_readid *)data;
|
||||
|
||||
/* set up a buffer header for fdstrategy() */
|
||||
bp = (struct bio *)malloc(sizeof(struct bio), M_TEMP, M_NOWAIT);
|
||||
if(bp == 0)
|
||||
return ENOMEM;
|
||||
/*
|
||||
* keep the process from being swapped
|
||||
*/
|
||||
PHOLD(p);
|
||||
bzero((void *)bp, sizeof(*bp));
|
||||
bp->bio_cmd = BIO_FORMAT;
|
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bp = malloc(sizeof(struct bio), M_TEMP, M_ZERO | M_NOWAIT);
|
||||
if (bp == 0)
|
||||
return (ENOMEM);
|
||||
|
||||
/*
|
||||
* calculate a fake blkno, so fdstrategy() would initiate a
|
||||
* seek to the requested cylinder
|
||||
* Set up a bio request for fdstrategy(). bio_blkno is faked
|
||||
* so that fdstrategy() will seek to the the requested
|
||||
* cylinder, and use the desired head. Since we are not
|
||||
* interested in bioqdisksort() munging with our faked bio
|
||||
* request, we mark it as being an ordered request.
|
||||
*/
|
||||
bp->bio_blkno = (finfo->cyl * (fd->ft->sectrac * fd->ft->heads)
|
||||
+ finfo->head * fd->ft->sectrac) * fdblk / DEV_BSIZE;
|
||||
|
||||
bp->bio_bcount = sizeof(struct fd_idfield_data) * finfo->fd_formb_nsecs;
|
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bp->bio_data = (caddr_t)finfo;
|
||||
|
||||
/* now do the format */
|
||||
bp->bio_cmd = cmd;
|
||||
if (cmd == BIO_FORMAT) {
|
||||
bp->bio_blkno =
|
||||
(finfo->cyl * (fd->ft->sectrac * fd->ft->heads) +
|
||||
finfo->head * fd->ft->sectrac) *
|
||||
fdblk / DEV_BSIZE;
|
||||
bp->bio_bcount = sizeof(struct fd_idfield_data) *
|
||||
finfo->fd_formb_nsecs;
|
||||
} else if (cmd == BIO_RDSECTID) {
|
||||
bp->bio_blkno =
|
||||
(idfield->cyl * (fd->ft->sectrac * fd->ft->heads) +
|
||||
idfield->head * fd->ft->sectrac) *
|
||||
fdblk / DEV_BSIZE;
|
||||
bp->bio_bcount = sizeof(struct fdc_readid);
|
||||
} else
|
||||
panic("wrong cmd in fdmisccmd()");
|
||||
bp->bio_data = data;
|
||||
bp->bio_dev = dev;
|
||||
bp->bio_done = fdbiodone;
|
||||
fdstrategy(bp);
|
||||
|
||||
/* ...and wait for it to complete */
|
||||
s = splbio();
|
||||
while(!(bp->bio_flags & BIO_DONE)) {
|
||||
rv = tsleep((caddr_t)bp, PRIBIO, "fdform", 20 * hz);
|
||||
if (rv == EWOULDBLOCK)
|
||||
break;
|
||||
}
|
||||
splx(s);
|
||||
|
||||
if (rv == EWOULDBLOCK) {
|
||||
/* timed out */
|
||||
rv = EIO;
|
||||
device_unbusy(fd->dev);
|
||||
}
|
||||
if (bp->bio_flags & BIO_ERROR)
|
||||
rv = bp->bio_error;
|
||||
/*
|
||||
* allow the process to be swapped
|
||||
*/
|
||||
PRELE(p);
|
||||
free(bp, M_TEMP);
|
||||
return rv;
|
||||
}
|
||||
|
||||
static int
|
||||
fdreadid(dev_t dev, struct fdc_readid *idfield)
|
||||
{
|
||||
fdu_t fdu;
|
||||
fd_p fd;
|
||||
|
||||
struct bio *bp;
|
||||
int rv = 0, s;
|
||||
size_t fdblk;
|
||||
|
||||
fdu = FDUNIT(minor(dev));
|
||||
fd = devclass_get_softc(fd_devclass, fdu);
|
||||
fdblk = 128 << fd->ft->secsize;
|
||||
|
||||
/* set up a buffer header for fdstrategy() */
|
||||
bp = (struct bio *)malloc(sizeof(struct bio), M_TEMP, M_NOWAIT);
|
||||
if(bp == 0)
|
||||
return ENOMEM;
|
||||
|
||||
bzero((void *)bp, sizeof(*bp));
|
||||
bp->bio_cmd = BIO_READ;
|
||||
bp->bio_flags |= BIO_RDSECTID;
|
||||
bp->bio_flags = BIO_ORDERED;
|
||||
|
||||
/*
|
||||
* calculate a fake blkno, so fdstrategy() would initiate a
|
||||
* seek to the requested cylinder
|
||||
* Now run the cmd. The wait loop is a version of bufwait()
|
||||
* adapted for struct bio instead of struct buf and
|
||||
* specialized for the current context.
|
||||
*/
|
||||
bp->bio_blkno = (idfield->cyl * (fd->ft->sectrac * fd->ft->heads)
|
||||
+ idfield->head * fd->ft->sectrac) * fdblk / DEV_BSIZE;
|
||||
bp->bio_bcount = sizeof(struct fdc_readid);
|
||||
bp->bio_data = (caddr_t)idfield;
|
||||
bp->bio_dev = dev;
|
||||
bp->bio_done = fdbiodone;
|
||||
fdstrategy(bp);
|
||||
while((bp->bio_flags & BIO_DONE) == 0)
|
||||
tsleep(bp, PRIBIO, "fdcmd", 0);
|
||||
|
||||
/* ...and wait for it to complete */
|
||||
s = splbio();
|
||||
while(!(bp->bio_flags & BIO_DONE)) {
|
||||
rv = tsleep((caddr_t)bp, PRIBIO, "fdrdid", 10 * hz);
|
||||
if (rv == EWOULDBLOCK)
|
||||
break;
|
||||
}
|
||||
splx(s);
|
||||
|
||||
if (rv == EWOULDBLOCK) {
|
||||
/* timed out */
|
||||
rv = EIO;
|
||||
device_unbusy(fd->dev);
|
||||
}
|
||||
if (bp->bio_flags & BIO_ERROR)
|
||||
rv = bp->bio_error;
|
||||
free(bp, M_TEMP);
|
||||
return rv;
|
||||
return (bp->bio_flags & BIO_ERROR ? bp->bio_error : 0);
|
||||
}
|
||||
|
||||
/*
|
||||
* TODO: don't allocate buffer on stack.
|
||||
*/
|
||||
|
||||
static int
|
||||
fdioctl(dev_t dev, u_long cmd, caddr_t addr, int flag, struct proc *p)
|
||||
{
|
||||
fdu_t fdu = FDUNIT(minor(dev));
|
||||
fd_p fd = devclass_get_softc(fd_devclass, fdu);
|
||||
size_t fdblk;
|
||||
|
||||
fdu_t fdu;
|
||||
fd_p fd;
|
||||
struct fd_type *fdt;
|
||||
struct disklabel *dl;
|
||||
struct fdc_status *fsp;
|
||||
struct fdc_readid *rid;
|
||||
char buffer[DEV_BSIZE];
|
||||
char *buffer;
|
||||
size_t fdblk;
|
||||
int error = 0;
|
||||
|
||||
fdu = FDUNIT(minor(dev));
|
||||
fd = devclass_get_softc(fd_devclass, fdu);
|
||||
fdblk = 128 << fd->ft->secsize;
|
||||
|
||||
switch (cmd) {
|
||||
case DIOCGDINFO:
|
||||
bzero(buffer, sizeof (buffer));
|
||||
buffer = malloc(DEV_BSIZE, M_TEMP, M_ZERO | M_NOWAIT);
|
||||
if (buffer == 0) {
|
||||
error = ENOMEM;
|
||||
break;
|
||||
}
|
||||
dl = (struct disklabel *)buffer;
|
||||
dl->d_secsize = fdblk;
|
||||
fdt = fd->ft;
|
||||
@ -2407,6 +2349,7 @@ fdioctl(dev_t dev, u_long cmd, caddr_t addr, int flag, struct proc *p)
|
||||
error = EINVAL;
|
||||
|
||||
*(struct disklabel *)addr = *dl;
|
||||
free(buffer, M_TEMP);
|
||||
break;
|
||||
|
||||
case DIOCSDINFO:
|
||||
@ -2427,12 +2370,19 @@ fdioctl(dev_t dev, u_long cmd, caddr_t addr, int flag, struct proc *p)
|
||||
|
||||
dl = (struct disklabel *)addr;
|
||||
|
||||
buffer = malloc(DEV_BSIZE, M_TEMP, M_ZERO | M_NOWAIT);
|
||||
if (buffer == 0) {
|
||||
error = ENOMEM;
|
||||
break;
|
||||
}
|
||||
if ((error = setdisklabel((struct disklabel *)buffer, dl,
|
||||
(u_long)0)) != 0)
|
||||
break;
|
||||
|
||||
error = writedisklabel(dev, (struct disklabel *)buffer);
|
||||
free(buffer, M_TEMP);
|
||||
break;
|
||||
|
||||
case FD_FORM:
|
||||
if ((flag & FWRITE) == 0)
|
||||
error = EBADF; /* must be opened for writing */
|
||||
@ -2440,7 +2390,7 @@ fdioctl(dev_t dev, u_long cmd, caddr_t addr, int flag, struct proc *p)
|
||||
FD_FORMAT_VERSION)
|
||||
error = EINVAL; /* wrong version of formatting prog */
|
||||
else
|
||||
error = fdformat(dev, (struct fd_formb *)addr, p);
|
||||
error = fdmisccmd(dev, BIO_FORMAT, addr);
|
||||
break;
|
||||
|
||||
case FD_GTYPE: /* get drive type */
|
||||
@ -2462,6 +2412,12 @@ fdioctl(dev_t dev, u_long cmd, caddr_t addr, int flag, struct proc *p)
|
||||
fd->options = *(int *)addr;
|
||||
break;
|
||||
|
||||
#ifdef FDC_DEBUG
|
||||
case FD_DEBUG:
|
||||
fd_debug = *(int *)addr;
|
||||
break;
|
||||
#endif
|
||||
|
||||
case FD_CLRERR:
|
||||
if (suser(p) != 0)
|
||||
return EPERM;
|
||||
@ -2479,7 +2435,7 @@ fdioctl(dev_t dev, u_long cmd, caddr_t addr, int flag, struct proc *p)
|
||||
rid = (struct fdc_readid *)addr;
|
||||
if (rid->cyl > MAX_CYLINDER || rid->head > MAX_HEAD)
|
||||
return EINVAL;
|
||||
error = fdreadid(dev, rid);
|
||||
error = fdmisccmd(dev, BIO_RDSECTID, addr);
|
||||
break;
|
||||
|
||||
default:
|
||||
|
||||
Loading…
x
Reference in New Issue
Block a user