- Check if a disk has wedges, and use the wedge device corresponding to the
root partition, instead of punting. This makes booting work with traditional disklabel disks and wedge autoconfiguration. - factor out disk opening code.
This commit is contained in:
christos
parent
adddcaa6ee
commit
cf1ddb6596
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@ -1,4 +1,4 @@
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/* $NetBSD: x86_autoconf.c,v 1.17 2006/08/12 19:55:42 christos Exp $ */
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/* $NetBSD: x86_autoconf.c,v 1.18 2006/08/12 21:45:22 christos Exp $ */
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/*-
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* Copyright (c) 1990 The Regents of the University of California.
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@ -65,6 +65,109 @@ __KERNEL_RCSID(0, "$NetBSD");
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struct disklist *x86_alldisks;
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int x86_ndisks;
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static struct vnode *
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opendisk(struct device *dv)
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{
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int bmajor;
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struct vnode *tmpvn;
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int error;
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/*
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* Lookup major number for disk block device.
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*/
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bmajor = devsw_name2blk(dv->dv_xname, NULL, 0);
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if (bmajor == -1)
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return NULL;
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/*
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* Fake a temporary vnode for the disk, open it, and read
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* and hash the sectors.
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*/
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if (bdevvp(MAKEDISKDEV(bmajor, device_unit(dv), RAW_PART), &tmpvn))
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panic("%s: can't alloc vnode for %s", __func__, dv->dv_xname);
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error = VOP_OPEN(tmpvn, FREAD, NOCRED, 0);
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if (error) {
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#ifndef DEBUG
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/*
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* Ignore errors caused by missing device, partition,
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* or medium.
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*/
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if (error != ENXIO && error != ENODEV)
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#endif
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printf("%s: can't open dev %s (%d)\n",
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__func__, dv->dv_xname, error);
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vput(tmpvn);
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return NULL;
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}
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return tmpvn;
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}
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static void
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handle_wedges(struct device *dv, int par)
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{
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struct dkwedge_list wl;
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struct dkwedge_info *wi;
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struct vnode *vn;
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char diskname[16];
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int i, error;
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if ((vn = opendisk(dv)) == NULL)
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goto out;
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wl.dkwl_bufsize = sizeof(*wi) * 16;
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wl.dkwl_buf = wi = malloc(wl.dkwl_bufsize, M_TEMP, M_WAITOK);
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error = VOP_IOCTL(vn, DIOCLWEDGES, &wl, FREAD, NOCRED, 0);
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vput(vn);
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if (error) {
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#ifdef DEBUG_WEDGE
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printf("%s: List wedges returned %d\n", dv->dv_xname, error);
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#endif
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free(wi, M_TEMP);
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goto out;
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}
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#ifdef DEBUG_WEDGE
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printf("%s: Returned %u(%u) wedges\n", dv->dv_xname,
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wl.dkwl_nwedges, wl.dkwl_ncopied);
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#endif
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snprintf(diskname, sizeof(diskname), "%s%c", dv->dv_xname,
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par + 'a');
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for (i = 0; i < wl.dkwl_ncopied; i++) {
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#ifdef DEBUG_WEDGE
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printf("%s: Looking for %s in %s\n",
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dv->dv_xname, diskname, wi[i].dkw_wname);
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#endif
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if (strcmp(wi[i].dkw_wname, diskname) == 0)
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break;
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}
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if (i == wl.dkwl_ncopied) {
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#ifdef DEBUG_WEDGE
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printf("%s: Cannot find wedge with parent %s\n",
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dv->dv_xname, diskname);
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#endif
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free(wi, M_TEMP);
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goto out;
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}
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#ifdef DEBUG_WEDGE
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printf("%s: Setting boot wedge %s (%s) at %llu %llu\n",
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dv->dv_xname, wi[i].dkw_devname, wi[i].dkw_wname,
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(unsigned long long)wi[i].dkw_offset,
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(unsigned long long)wi[i].dkw_size);
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#endif
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dkwedge_set_bootwedge(dv, wi[i].dkw_offset, wi[i].dkw_size);
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free(wi, M_TEMP);
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return;
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out:
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booted_device = dv;
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booted_partition = par;
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}
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static int
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is_valid_disk(struct device *dv)
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{
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@ -93,7 +196,7 @@ matchbiosdisks(void)
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struct vnode *tv;
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char mbr[DEV_BSIZE];
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int dklist_size;
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int bmajor, numbig;
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int numbig;
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big = lookup_bootinfo(BTINFO_BIOSGEOM);
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@ -149,19 +252,9 @@ matchbiosdisks(void)
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sizeof(x86_alldisks->dl_nativedisks[n].ni_devname),
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"%s", dv->dv_xname);
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bmajor = devsw_name2blk(dv->dv_xname, NULL, 0);
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if (bmajor == -1)
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return;
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if (bdevvp(MAKEDISKDEV(bmajor, device_unit(dv),
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RAW_PART), &tv))
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panic("matchbiosdisks: can't alloc vnode");
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error = VOP_OPEN(tv, FREAD, NOCRED, 0);
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if (error) {
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vput(tv);
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if ((tv = opendisk(dv)) == NULL)
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continue;
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}
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error = vn_rdwr(UIO_READ, tv, mbr, DEV_BSIZE, 0,
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UIO_SYSSPACE, 0, NOCRED, NULL, NULL);
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VOP_CLOSE(tv, FREAD, NOCRED, 0);
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@ -215,7 +308,6 @@ match_bootwedge(struct device *dv, struct btinfo_bootwedge *biw)
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uint8_t bf[DEV_BSIZE];
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uint8_t hash[16];
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int found = 0;
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int bmajor;
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daddr_t blk;
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uint64_t nblks;
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@ -224,34 +316,6 @@ match_bootwedge(struct device *dv, struct btinfo_bootwedge *biw)
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*/
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if (biw->matchblk == -1)
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return (0);
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/*
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* Lookup major number for disk block device.
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*/
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bmajor = devsw_name2blk(dv->dv_xname, NULL, 0);
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if (bmajor == -1)
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return (0); /* XXX panic ??? */
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/*
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* Fake a temporary vnode for the disk, open it, and read
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* and hash the sectors.
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*/
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if (bdevvp(MAKEDISKDEV(bmajor, device_unit(dv), RAW_PART), &tmpvn))
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panic("findroot: can't alloc vnode");
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error = VOP_OPEN(tmpvn, FREAD, NOCRED, 0);
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if (error) {
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#ifndef DEBUG
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/*
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* Ignore errors caused by missing device, partition,
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* or medium.
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*/
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if (error != ENXIO && error != ENODEV)
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#endif
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printf("findroot: can't open dev %s (%d)\n",
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dv->dv_xname, error);
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vput(tmpvn);
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return (0);
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}
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MD5Init(&ctx);
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for (blk = biw->matchblk, nblks = biw->matchnblks;
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@ -288,7 +352,9 @@ match_bootdisk(struct device *dv, struct btinfo_bootdisk *bid)
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int error;
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struct disklabel label;
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int found = 0;
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int bmajor;
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if (device_is_a(dv, "dk"))
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return 0;
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/*
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* A disklabel is required here. The boot loader doesn't refuse
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@ -298,33 +364,9 @@ match_bootdisk(struct device *dv, struct btinfo_bootdisk *bid)
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if (bid->labelsector == -1)
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return (0);
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/*
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* Lookup major number for disk block device.
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*/
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bmajor = devsw_name2blk(dv->dv_xname, NULL, 0);
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if (bmajor == -1)
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return (0); /* XXX panic ??? */
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if ((tmpvn = opendisk(dv)) == NULL)
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return 0;
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/*
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* Fake a temporary vnode for the disk, open it, and read
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* the disklabel for comparison.
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*/
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if (bdevvp(MAKEDISKDEV(bmajor, device_unit(dv), RAW_PART), &tmpvn))
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panic("findroot: can't alloc vnode");
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error = VOP_OPEN(tmpvn, FREAD, NOCRED, 0);
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if (error) {
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#ifndef DEBUG
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/*
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* Ignore errors caused by missing device, partition,
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* or medium.
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*/
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if (error != ENXIO && error != ENODEV)
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#endif
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printf("findroot: can't open dev %s (%d)\n",
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dv->dv_xname, error);
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vput(tmpvn);
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return (0);
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}
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error = VOP_IOCTL(tmpvn, DIOCGDINFO, &label, FREAD, NOCRED, 0);
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if (error) {
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/*
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@ -340,7 +382,7 @@ match_bootdisk(struct device *dv, struct btinfo_bootdisk *bid)
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if (label.d_type == bid->label.type &&
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label.d_checksum == bid->label.checksum &&
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strncmp(label.d_packname, bid->label.packname, 16) == 0)
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found = 1;
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found = 1;
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closeout:
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VOP_CLOSE(tmpvn, FREAD, NOCRED, 0);
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@ -403,8 +445,7 @@ findroot(void)
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if (strncmp(cd->cf_name, biv->devname, len) == 0 &&
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biv->devname[len] - '0' == cd->cf_unit) {
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booted_device = dv;
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booted_partition = biv->devname[len + 1] - 'a';
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handle_wedges(dv, biv->devname[len + 1] - 'a');
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return;
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}
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}
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@ -497,8 +538,7 @@ findroot(void)
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booted_device->dv_xname, dv->dv_xname);
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continue;
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}
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booted_device = dv;
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booted_partition = bid->partition;
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handle_wedges(dv, bid->partition);
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}
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if (booted_device)
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