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[src/trunk]: src/sys/dev/dkwedge recognize apple disks.
details: https://anonhg.NetBSD.org/src/rev/5c7c70073c91
branches: trunk
changeset: 778638:5c7c70073c91
user: christos <christos%NetBSD.org@localhost>
date: Sat Apr 07 05:36:10 2012 +0000
description:
recognize apple disks.
diffstat:
sys/dev/dkwedge/dkwedge_apple.c | 222 ++++++++++++++++++++++++++++++++++++++++
1 files changed, 222 insertions(+), 0 deletions(-)
diffs (226 lines):
diff -r eb66694c073c -r 5c7c70073c91 sys/dev/dkwedge/dkwedge_apple.c
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/sys/dev/dkwedge/dkwedge_apple.c Sat Apr 07 05:36:10 2012 +0000
@@ -0,0 +1,222 @@
+/* $NetBSD: dkwedge_apple.c,v 1.1 2012/04/07 05:36:10 christos Exp $ */
+
+/*-
+ * Copyright (c) 2012 The NetBSD Foundation, Inc.
+ * All rights reserved.
+ *
+ * This code is derived from software contributed to The NetBSD Foundation
+ * by Christos Zoulas.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
+ * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+ * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/*
+ * Apple support for disk wedges
+ */
+
+#include <sys/cdefs.h>
+__KERNEL_RCSID(0, "$NetBSD: dkwedge_apple.c,v 1.1 2012/04/07 05:36:10 christos Exp $");
+
+#include <sys/param.h>
+#ifdef _KERNEL
+#include <sys/systm.h>
+#endif
+#include <sys/proc.h>
+#include <sys/errno.h>
+#include <sys/disk.h>
+#include <sys/vnode.h>
+#include <sys/malloc.h>
+#include <sys/bitops.h>
+
+#include <sys/bootblock.h>
+
+#define SWAP16(x) ap->x = be16toh(ap->x)
+#define SWAP32(x) ap->x = be32toh(ap->x)
+
+#ifdef DKWEDGE_DEBUG
+#define DPRINTF(fmt, ...) printf(fmt, __VA_ARGS__)
+#else
+#define DPRINTF(fmt, ...)
+#endif
+
+static void
+swap_apple_drvr_descriptor(struct apple_drvr_descriptor *ap)
+{
+ SWAP32(descBlock);
+ SWAP16(descSize);
+ SWAP16(descType);
+}
+
+static void
+swap_apple_drvr_map(struct apple_drvr_map *ap)
+{
+ uint16_t i;
+
+ SWAP16(sbSig);
+ SWAP16(sbBlockSize);
+ SWAP32(sbBlkCount);
+ SWAP16(sbDevType);
+ SWAP16(sbDevID);
+ SWAP32(sbData);
+ SWAP16(sbDrvrCount);
+
+ if (ap->sbDrvrCount >= APPLE_DRVR_MAP_MAX_DESCRIPTORS)
+ ap->sbDrvrCount = APPLE_DRVR_MAP_MAX_DESCRIPTORS;
+
+ for (i = 0; i < ap->sbDrvrCount; i++)
+ swap_apple_drvr_descriptor(&ap->sb_dd[i]);
+}
+
+static void
+swap_apple_part_map_entry(struct apple_part_map_entry *ap)
+{
+ SWAP16(pmSig);
+ SWAP16(pmSigPad);
+ SWAP32(pmMapBlkCnt);
+ SWAP32(pmPyPartStart);
+ SWAP32(pmPartBlkCnt);
+ SWAP32(pmLgDataStart);
+ SWAP32(pmDataCnt);
+ SWAP32(pmPartStatus);
+ SWAP32(pmLgBootStart);
+ SWAP32(pmBootSize);
+ SWAP32(pmBootLoad);
+ SWAP32(pmBootLoad2);
+ SWAP32(pmBootEntry);
+ SWAP32(pmBootEntry2);
+ SWAP32(pmBootCksum);
+}
+
+#undef SWAP16
+#undef SWAP32
+
+#define ASIZE 16384
+
+#ifdef _KERNEL
+#define DKW_MALLOC(SZ) malloc((SZ), M_DEVBUF, M_WAITOK)
+#define DKW_FREE(PTR) free((PTR), M_DEVBUF)
+#else
+#define DKW_MALLOC(SZ) malloc((SZ))
+#define DKW_FREE(PTR) free((PTR))
+#endif
+
+static struct {
+ const char *name;
+ const char *type;
+} map[] = {
+ { APPLE_PART_TYPE_UNIX, DKW_PTYPE_SYSV },
+ { APPLE_PART_TYPE_MAC, DKW_PTYPE_APPLEHFS },
+};
+
+
+static int
+dkwedge_discover_apple(struct disk *pdk, struct vnode *vp)
+{
+ size_t i;
+ int error;
+ void *buf;
+ uint32_t blocksize, offset, rsize;
+ struct apple_drvr_map *am;
+ struct apple_part_map_entry *ae;
+
+ buf = DKW_MALLOC(ASIZE);
+ if ((error = dkwedge_read(pdk, vp, 0, buf, ASIZE)) != 0) {
+ DPRINTF("%s: read @%u %d\n", __func__, 0, error);
+ goto out;
+ }
+
+ am = buf;
+ swap_apple_drvr_map(am);
+
+ error = ESRCH;
+
+ if (am->sbSig != APPLE_DRVR_MAP_MAGIC) {
+ DPRINTF("%s: drvr magic %x != %x\n", __func__, am->sbSig,
+ APPLE_DRVR_MAP_MAGIC);
+ goto out;
+ }
+
+ blocksize = am->sbBlockSize;
+
+ rsize = 1 << (ilog2(MAX(sizeof(*ae), blocksize) - 1) + 1);
+ if (ASIZE < rsize) {
+ DPRINTF("%s: buffer too small %u < %u\n", __func__, ASIZE,
+ rsize);
+ goto out;
+ }
+
+ ae = buf;
+ for (offset = blocksize;; offset += rsize) {
+ DPRINTF("%s: offset %x rsize %x\n", __func__, offset, rsize);
+ if ((error = dkwedge_read(pdk, vp, offset / DEV_BSIZE, buf,
+ rsize)) != 0) {
+ DPRINTF("%s: read @%u %d\n", __func__, offset,
+ error);
+ goto out;
+ }
+
+ swap_apple_part_map_entry(ae);
+ if (ae->pmSig != APPLE_PART_MAP_ENTRY_MAGIC) {
+ DPRINTF("%s: part magic %x != %x\n", __func__,
+ ae->pmSig, APPLE_PART_MAP_ENTRY_MAGIC);
+ break;
+ }
+
+ for (i = 0; i < __arraycount(map); i++)
+ if (strcasecmp(map[i].name, ae->pmPartType) == 0)
+ break;
+
+ DPRINTF("%s: %s/%s PH=%u/%u LG=%u/%u\n", __func__,
+ ae->pmPartName, ae->pmPartType,
+ ae->pmPyPartStart, ae->pmPartBlkCnt,
+ ae->pmLgDataStart, ae->pmDataCnt);
+
+ if (i == __arraycount(map))
+ continue;
+
+ struct dkwedge_info dkw;
+
+ strcpy(dkw.dkw_ptype, map[i].type);
+ strcpy(dkw.dkw_parent, pdk->dk_name);
+ dkw.dkw_offset = ae->pmPyPartStart;
+ dkw.dkw_size = ae->pmPartBlkCnt;
+ strlcpy(dkw.dkw_wname, ae->pmPartName, sizeof(dkw.dkw_wname));
+ error = dkwedge_add(&dkw);
+ if (error == EEXIST)
+ aprint_error("%s: wedge named '%s' already "
+ "exists, manual intervention required\n",
+ pdk->dk_name, dkw.dkw_wname);
+ else if (error)
+ aprint_error("%s: error %d adding partition "
+ "%s type %s\n", pdk->dk_name, error,
+ ae->pmPartType, dkw.dkw_ptype);
+ }
+
+out:
+ DKW_FREE(buf);
+ DPRINTF("%s: return %d\n", __func__, error);
+ return error;
+}
+
+#ifdef _KERNEL
+DKWEDGE_DISCOVERY_METHOD_DECL(APPLE, -5, dkwedge_discover_apple);
+#endif
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