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[Oops, forgot to commit this together with things that depend on it.]
First attempt at creating devfs entries for sliced devices. Doesn't quite work yet, so the heart of it is disabled. Added bdev and cdev args to dsopen(). Create devfs entries in dsopen() and (unsuccessfully) attempt to make them go away at the right times. DEVFS is #undefed at the start so that this shouldn't cause problems.
This commit is contained in:
Bruce Evans
parent
c8f2fe8db8
commit
af4cb3a1c4
Notes:
svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=13648
@ -43,11 +43,15 @@
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* from: wd.c,v 1.55 1994/10/22 01:57:12 phk Exp $
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* from: @(#)ufs_disksubr.c 7.16 (Berkeley) 5/4/91
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* from: ufs_disksubr.c,v 1.8 1994/06/07 01:21:39 phk Exp $
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* $Id: subr_diskslice.c,v 1.16 1996/01/07 22:39:06 phk Exp $
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* $Id: subr_diskslice.c,v 1.17 1996/01/16 18:11:24 phk Exp $
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*/
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#include <sys/param.h>
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#include <sys/buf.h>
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#undef DEVFS /* XXX */
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#ifdef DEVFS
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#include <sys/devfsext.h>
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#endif
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#include <sys/disklabel.h>
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#include <sys/diskslice.h>
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#include <sys/dkbad.h>
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@ -70,12 +74,17 @@ static volatile bool_t ds_debug;
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static void dsiodone __P((struct buf *bp));
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static char *fixlabel __P((char *sname, struct diskslice *sp,
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struct disklabel *lp, int writeflag));
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static void free_label __P((struct diskslices *ssp, int slice));
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static void partition_info __P((char *sname, int part, struct partition *pp));
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static void slice_info __P((char *sname, struct diskslice *sp));
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static void set_ds_bad __P((struct diskslices *ssp, int slice,
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struct dkbad_intern *btp));
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static void set_ds_label __P((struct diskslices *ssp, int slice,
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struct disklabel *lp));
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#ifdef DEVFS
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static void set_ds_labeldevs __P((char *dname, dev_t dev,
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struct diskslices *ssp));
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#endif
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static void set_ds_wlabel __P((struct diskslices *ssp, int slice,
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int wlabel));
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@ -253,6 +262,9 @@ void
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dsgone(sspp)
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struct diskslices **sspp;
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{
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#ifdef DEVFS
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int part;
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#endif
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int slice;
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struct diskslice *sp;
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struct diskslices *ssp;
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@ -263,10 +275,13 @@ dsgone(sspp)
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free(sp->ds_bad, M_DEVBUF);
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set_ds_bad(ssp, slice, (struct dkbad_intern *)NULL);
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}
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if (sp->ds_label != NULL) {
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free(sp->ds_label, M_DEVBUF);
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set_ds_label(ssp, slice, (struct disklabel *)NULL);
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}
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#ifdef DEVFS
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if (sp->ds_bdev != NULL)
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devfs_remove_dev(sp->ds_bdev);
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if (sp->ds_cdev != NULL)
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devfs_remove_dev(sp->ds_cdev);
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#endif
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free_label(ssp, slice);
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}
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free(ssp, M_DEVBUF);
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*sspp = NULL;
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@ -362,9 +377,11 @@ dsioctl(dname, dev, cmd, data, flags, sspp, strat, setgeom)
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free(lp, M_DEVBUF);
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return (error);
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}
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if (sp->ds_label != NULL)
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free(sp->ds_label, M_DEVBUF);
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free_label(ssp, slice);
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set_ds_label(ssp, slice, lp);
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#ifdef DEVFS
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set_ds_labeldevs(dname, dev, ssp);
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#endif
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return (0);
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case DIOCSYNCSLICEINFO:
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@ -393,7 +410,8 @@ dsioctl(dname, dev, cmd, data, flags, sspp, strat, setgeom)
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error = dsopen(dname, dev,
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ssp->dss_slices[WHOLE_DISK_SLICE].ds_copenmask
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& (1 << RAW_PART) ? S_IFCHR : S_IFBLK,
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sspp, lp, strat, setgeom);
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sspp, lp, strat, setgeom, ssp->dss_bdevsw,
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ssp->dss_cdevsw);
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if (error != 0) {
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free(lp, M_DEVBUF);
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*sspp = ssp;
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@ -417,9 +435,12 @@ dsioctl(dname, dev, cmd, data, flags, sspp, strat, setgeom)
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dkmodslice(dkmodpart(dev, part),
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slice),
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S_IFBLK, sspp, lp, strat,
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setgeom);
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setgeom, ssp->dss_bdevsw,
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ssp->dss_cdevsw);
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if (error != 0) {
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/* XXX should free devfs toks. */
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free(lp, M_DEVBUF);
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/* XXX should restore devfs toks. */
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*sspp = ssp;
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return (EBUSY);
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}
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@ -432,15 +453,19 @@ dsioctl(dname, dev, cmd, data, flags, sspp, strat, setgeom)
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dkmodslice(dkmodpart(dev, part),
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slice),
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S_IFCHR, sspp, lp, strat,
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setgeom);
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setgeom, ssp->dss_bdevsw,
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ssp->dss_cdevsw);
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if (error != 0) {
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/* XXX should free devfs toks. */
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free(lp, M_DEVBUF);
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/* XXX should restore devfs toks. */
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*sspp = ssp;
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return (EBUSY);
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}
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}
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}
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/* XXX devfs tokens? */
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free(lp, M_DEVBUF);
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dsgone(&ssp);
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return (0);
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@ -542,7 +567,7 @@ dsname(dname, unit, slice, part, partname)
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* strategy routine must be special to allow activity.
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*/
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int
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dsopen(dname, dev, mode, sspp, lp, strat, setgeom)
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dsopen(dname, dev, mode, sspp, lp, strat, setgeom, bdevsw, cdevsw)
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char *dname;
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dev_t dev;
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int mode;
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@ -550,11 +575,19 @@ dsopen(dname, dev, mode, sspp, lp, strat, setgeom)
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struct disklabel *lp;
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d_strategy_t *strat;
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ds_setgeom_t *setgeom;
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struct bdevsw *bdevsw;
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struct cdevsw *cdevsw;
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{
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#ifdef DEVFS
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char devname[64];
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#endif
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int error;
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struct disklabel *lp1;
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char *msg;
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u_char mask;
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#ifdef DEVFS
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int mynor;
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#endif
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bool_t need_init;
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int part;
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char partname[2];
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@ -582,6 +615,10 @@ dsopen(dname, dev, mode, sspp, lp, strat, setgeom)
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lp->d_npartitions = RAW_PART + 1;
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lp->d_partitions[RAW_PART].p_size = lp->d_secperunit;
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ssp = *sspp;
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#ifdef DEVFS
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ssp->dss_bdevsw = bdevsw;
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ssp->dss_cdevsw = cdevsw;
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#endif
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/*
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* If there are no real slices, then make the compatiblity
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@ -624,6 +661,17 @@ dsopen(dname, dev, mode, sspp, lp, strat, setgeom)
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sp = &ssp->dss_slices[slice];
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part = dkpart(dev);
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unit = dkunit(dev);
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#ifdef DEVFS
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if (slice >= BASE_SLICE && sp->ds_bdev == NULL && sp->ds_size != 0) {
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mynor = minor(dkmodpart(dev, RAW_PART));
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sprintf(devname, "r%s",
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dsname(dname, unit, slice, RAW_PART, partname));
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sp->ds_bdev = devfs_add_devsw("/", devname + 1, bdevsw,
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mynor, DV_BLK, 0, 0, 0640);
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sp->ds_cdev = devfs_add_devsw("/", devname, cdevsw,
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mynor, DV_CHR, 0, 0, 0640);
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}
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#endif
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if (sp->ds_label == NULL) {
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set_ds_wlabel(ssp, slice, TRUE); /* XXX invert */
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lp1 = malloc(sizeof *lp1, M_DEVBUF, M_WAITOK);
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@ -673,6 +721,9 @@ dsopen(dname, dev, mode, sspp, lp, strat, setgeom)
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}
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}
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set_ds_label(ssp, slice, lp);
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#ifdef DEVFS
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set_ds_labeldevs(dname, dev, ssp);
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#endif
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set_ds_wlabel(ssp, slice, FALSE);
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}
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if (part != RAW_PART
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@ -720,6 +771,31 @@ dssize(dev, sspp, dopen, dclose)
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return ((int)lp->d_partitions[part].p_size);
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}
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static void
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free_label(ssp, slice)
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struct diskslices *ssp;
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int slice;
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{
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struct disklabel *lp;
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int part;
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struct diskslice *sp;
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sp = &ssp->dss_slices[slice];
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if (sp->ds_label == NULL)
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return;
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lp = sp->ds_label;
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#ifdef DEVFS
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for (part = 0; part < lp->d_npartitions; part++) {
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if (sp->ds_bdevs[part] != NULL)
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devfs_remove_dev(sp->ds_bdevs[part]);
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if (sp->ds_cdevs[part] != NULL)
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devfs_remove_dev(sp->ds_cdevs[part]);
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}
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#endif
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free(lp, M_DEVBUF);
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set_ds_label(ssp, slice, (struct disklabel *)NULL);
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}
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static char *
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fixlabel(sname, sp, lp, writeflag)
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char *sname;
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@ -858,6 +934,52 @@ set_ds_label(ssp, slice, lp)
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ssp->dss_slices[COMPATIBILITY_SLICE].ds_label = lp;
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}
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#ifdef DEVFS
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static void
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set_ds_labeldevs(dname, dev, ssp)
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char *dname;
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dev_t dev;
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struct diskslices *ssp;
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{
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char devname[64];
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struct disklabel *lp;
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int mynor;
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int part;
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char partname[2];
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struct partition *pp;
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int slice;
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struct diskslice *sp;
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slice = dkslice(dev);
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sp = &ssp->dss_slices[slice];
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if (sp->ds_size == 0)
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return;
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lp = sp->ds_label;
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for (part = 0; part < lp->d_npartitions; part++) {
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pp = &lp->d_partitions[part];
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if (pp->p_size == 0)
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continue;
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sprintf(devname, "r%s%s",
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dsname(dname, dkunit(dev), slice, part, partname),
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partname);
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if (part == RAW_PART && sp->ds_bdev != NULL) {
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sp->ds_bdevs[part] =
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dev_link("/", devname + 1, sp->ds_bdev);
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sp->ds_cdevs[part] =
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dev_link("/", devname, sp->ds_cdev);
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} else {
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mynor = minor(dkmodpart(dev, part));
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sp->ds_bdevs[part] =
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devfs_add_devsw("/", devname+1, ssp->dss_bdevsw,
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mynor, DV_BLK, 0, 0, 0640);
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sp->ds_cdevs[part] =
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devfs_add_devsw("/", devname, ssp->dss_cdevsw,
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mynor, DV_CHR, 0, 0, 0640);
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}
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}
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}
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#endif /* DEVFS */
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static void
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set_ds_wlabel(ssp, slice, wlabel)
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struct diskslices *ssp;
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