sbin/fstyp: recgonize Dragonfly's hammer and hammer2.

This is based on DragonFly's implementation from about 2019-09-13. It
only contains the basic code and header information to identify the
disks.

Relnotes:		yes
Differential Revision:	https://reviews.freebsd.org/D13369

usr.sbin/fstyp/Makefile

@@ -3,7 +3,8 @@
 .include <src.opts.mk>
 
 PROG=	fstyp
-SRCS=	apfs.c cd9660.c exfat.c ext2fs.c fstyp.c geli.c hfsplus.c msdosfs.c ntfs.c ufs.c
+SRCS=	apfs.c cd9660.c exfat.c ext2fs.c fstyp.c geli.c hammer.c	\
+	hammer2.c hfsplus.c msdosfs.c ntfs.c ufs.c
 
 .if ${MK_ZFS} != "no"
 SRCS +=	zfs.c

usr.sbin/fstyp/fstyp.8

@@ -27,7 +27,7 @@
 .\"
 .\" $FreeBSD$
 .\"
-.Dd April 26, 2017
+.Dd December 24, 2019
 .Dt FSTYP 8
 .Os
 .Sh NAME
@@ -68,6 +68,10 @@ ext2fs
 .It
 geli
 .It
+hammer
+.It
+hammer2
+.It
 msdosfs
 .It
 ntfs

usr.sbin/fstyp/fstyp.c

@@ -69,6 +69,8 @@ static struct {
 	{ "exfat", &fstyp_exfat, false, EXFAT_ENC },
 	{ "ext2fs", &fstyp_ext2fs, false, NULL },
 	{ "geli", &fstyp_geli, true, NULL },
+	{ "hammer", &fstyp_hammer, true, NULL },
+	{ "hammer2", &fstyp_hammer2, true, NULL },
 	{ "hfs+", &fstyp_hfsp, false, NULL },
 	{ "msdosfs", &fstyp_msdosfs, false, NULL },
 	{ "ntfs", &fstyp_ntfs, false, NTFS_ENC },

usr.sbin/fstyp/fstyp.h

@@ -55,6 +55,8 @@ int	fstyp_cd9660(FILE *fp, char *label, size_t size);
 int	fstyp_exfat(FILE *fp, char *label, size_t size);
 int	fstyp_ext2fs(FILE *fp, char *label, size_t size);
 int	fstyp_geli(FILE *fp, char *label, size_t size);
+int	fstyp_hammer(FILE *fp, char *label, size_t size);
+int	fstyp_hammer2(FILE *fp, char *label, size_t size);
 int	fstyp_hfsp(FILE *fp, char *label, size_t size);
 int	fstyp_msdosfs(FILE *fp, char *label, size_t size);
 int	fstyp_ntfs(FILE *fp, char *label, size_t size);

usr.sbin/fstyp/hammer.c

@@ -0,0 +1,198 @@
+/*-
+ * Copyright (c) 2016 The DragonFly Project
+ * All rights reserved.
+ *
+ * This software was developed by Edward Tomasz Napierala under sponsorship
+ * from the FreeBSD Foundation.
+ *
+ * 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 AUTHORS 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 AUTHORS 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.
+ */
+
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <err.h>
+#include <assert.h>
+
+#include <sys/types.h>
+
+#include "hammer_disk.h"
+
+#include "fstyp.h"
+
+static hammer_volume_ondisk_t
+__read_ondisk(FILE *fp)
+{
+	hammer_volume_ondisk_t ondisk;
+
+	ondisk = read_buf(fp, 0, sizeof(*ondisk));
+	if (ondisk == NULL)
+		err(1, "failed to read ondisk");
+
+	return (ondisk);
+}
+
+static int
+__test_ondisk(const hammer_volume_ondisk_t ondisk)
+{
+	static int count = 0;
+	static hammer_uuid_t fsid, fstype;
+	static char label[64];
+
+	if (ondisk->vol_signature != HAMMER_FSBUF_VOLUME &&
+	    ondisk->vol_signature != HAMMER_FSBUF_VOLUME_REV)
+		return (1);
+	if (ondisk->vol_rootvol != HAMMER_ROOT_VOLNO)
+		return (2);
+	if (ondisk->vol_no < 0 || ondisk->vol_no > HAMMER_MAX_VOLUMES - 1)
+		return (3);
+	if (ondisk->vol_count < 1 || ondisk->vol_count > HAMMER_MAX_VOLUMES)
+		return (4);
+
+	if (count == 0) {
+		count = ondisk->vol_count;
+		assert(count != 0);
+		memcpy(&fsid, &ondisk->vol_fsid, sizeof(fsid));
+		memcpy(&fstype, &ondisk->vol_fstype, sizeof(fstype));
+		strncpy(label, ondisk->vol_label, sizeof(label));
+	} else {
+		if (ondisk->vol_count != count)
+			return (5);
+		if (memcmp(&ondisk->vol_fsid, &fsid, sizeof(fsid)))
+			return (6);
+		if (memcmp(&ondisk->vol_fstype, &fstype, sizeof(fstype)))
+			return (7);
+		if (strncmp(ondisk->vol_label, label, sizeof(label)))
+			return (8);
+	}
+
+	return (0);
+}
+
+int
+fstyp_hammer(FILE *fp, char *label, size_t size)
+{
+	hammer_volume_ondisk_t ondisk;
+	int error = 1;
+
+	ondisk = __read_ondisk(fp);
+	if (ondisk->vol_no != HAMMER_ROOT_VOLNO)
+		goto done;
+	if (ondisk->vol_count != 1)
+		goto done;
+	if (__test_ondisk(ondisk))
+		goto done;
+
+	strlcpy(label, ondisk->vol_label, size);
+	error = 0;
+done:
+	free(ondisk);
+	return (error);
+}
+
+static int
+__test_volume(const char *volpath)
+{
+	hammer_volume_ondisk_t ondisk;
+	FILE *fp;
+	int volno = -1;
+
+	if ((fp = fopen(volpath, "r")) == NULL)
+		err(1, "failed to open %s", volpath);
+
+	ondisk = __read_ondisk(fp);
+	fclose(fp);
+	if (__test_ondisk(ondisk))
+		goto done;
+
+	volno = ondisk->vol_no;
+done:
+	free(ondisk);
+	return (volno);
+}
+
+static int
+__fsvtyp_hammer(const char *blkdevs, char *label, size_t size, int partial)
+{
+	hammer_volume_ondisk_t ondisk;
+	FILE *fp;
+	char *dup, *p, *volpath, x[HAMMER_MAX_VOLUMES];
+	int i, volno, error = 1;
+
+	memset(x, 0, sizeof(x));
+	dup = strdup(blkdevs);
+	p = dup;
+
+	while (p) {
+		volpath = p;
+		if ((p = strchr(p, ':')) != NULL)
+			*p++ = '\0';
+		if ((volno = __test_volume(volpath)) == -1)
+			break;
+		x[volno]++;
+	}
+
+	if ((fp = fopen(volpath, "r")) == NULL)
+		err(1, "failed to open %s", volpath);
+	ondisk = __read_ondisk(fp);
+	fclose(fp);
+
+	free(dup);
+
+	if (volno == -1)
+		goto done;
+	if (partial)
+		goto success;
+
+	for (i = 0; i < HAMMER_MAX_VOLUMES; i++)
+		if (x[i] > 1)
+			goto done;
+	for (i = 0; i < HAMMER_MAX_VOLUMES; i++)
+		if (x[i] == 0)
+			break;
+	if (ondisk->vol_count != i)
+		goto done;
+	for (; i < HAMMER_MAX_VOLUMES; i++)
+		if (x[i] != 0)
+			goto done;
+success:
+	strlcpy(label, ondisk->vol_label, size);
+	error = 0;
+done:
+	free(ondisk);
+	return (error);
+}
+
+int
+fsvtyp_hammer(const char *blkdevs, char *label, size_t size)
+{
+	return (__fsvtyp_hammer(blkdevs, label, size, 0));
+}
+
+int
+fsvtyp_hammer_partial(const char *blkdevs, char *label, size_t size)
+{
+	return (__fsvtyp_hammer(blkdevs, label, size, 1));
+}

usr.sbin/fstyp/hammer2.c

@@ -0,0 +1,152 @@
+/*-
+ * Copyright (c) 2017-2019 The DragonFly Project
+ * All rights reserved.
+ *
+ * This software was developed by Edward Tomasz Napierala under sponsorship
+ * from the FreeBSD Foundation.
+ *
+ * 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 AUTHORS 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 AUTHORS 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.
+ */
+
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <err.h>
+
+#include <sys/types.h>
+
+#include "hammer2_disk.h"
+
+#include "fstyp.h"
+
+static hammer2_volume_data_t*
+__read_voldata(FILE *fp)
+{
+	hammer2_volume_data_t *voldata;
+
+	voldata = read_buf(fp, 0, sizeof(*voldata));
+	if (voldata == NULL)
+		err(1, "failed to read volume data");
+
+	return (voldata);
+}
+
+static int
+__test_voldata(const hammer2_volume_data_t *voldata)
+{
+	if (voldata->magic != HAMMER2_VOLUME_ID_HBO &&
+	    voldata->magic != HAMMER2_VOLUME_ID_ABO)
+		return (1);
+
+	return (0);
+}
+
+static int
+__read_label(FILE *fp, char *label, size_t size)
+{
+	hammer2_blockref_t broot, best, *bref;
+	hammer2_media_data_t *vols[HAMMER2_NUM_VOLHDRS], *media;
+	hammer2_off_t io_off, io_base;
+	size_t bytes, io_bytes, boff;
+	int i, best_i, error = 0;
+
+	best_i = -1;
+	memset(&best, 0, sizeof(best));
+
+	for (i = 0; i < HAMMER2_NUM_VOLHDRS; i++) {
+		memset(&broot, 0, sizeof(broot));
+		broot.type = HAMMER2_BREF_TYPE_VOLUME;
+		broot.data_off = (i * HAMMER2_ZONE_BYTES64) | HAMMER2_PBUFRADIX;
+		vols[i] = read_buf(fp, broot.data_off & ~HAMMER2_OFF_MASK_RADIX,
+		    sizeof(*vols[i]));
+		broot.mirror_tid = vols[i]->voldata.mirror_tid;
+		if (best_i < 0 || best.mirror_tid < broot.mirror_tid) {
+			best_i = i;
+			best = broot;
+		}
+	}
+	if (best_i == -1) {
+		warnx("Failed to find volume header from zones");
+		error = 1;
+		goto done;
+	}
+
+	bref = &vols[best_i]->voldata.sroot_blockset.blockref[0];
+	if (bref->type != HAMMER2_BREF_TYPE_INODE) {
+		warnx("Superroot blockref type is not inode");
+		error = 2;
+		goto done;
+	}
+
+	bytes = bref->data_off & HAMMER2_OFF_MASK_RADIX;
+	if (bytes)
+		bytes = (size_t)1 << bytes;
+	if (bytes != sizeof(hammer2_inode_data_t)) {
+		warnx("Superroot blockref size does not match inode size");
+		error = 3;
+		goto done;
+	}
+
+	io_off = bref->data_off & ~HAMMER2_OFF_MASK_RADIX;
+	io_base = io_off & ~(hammer2_off_t)(HAMMER2_MINIOSIZE - 1);
+	boff = io_off - io_base;
+
+	io_bytes = HAMMER2_MINIOSIZE;
+	while (io_bytes + boff < bytes)
+		io_bytes <<= 1;
+	if (io_bytes > sizeof(*media)) {
+		warnx("Invalid I/O bytes");
+		error = 4;
+		goto done;
+	}
+
+	media = read_buf(fp, io_base, io_bytes);
+	if (boff)
+		memcpy(media, (char*)media + boff, bytes);
+
+	strlcpy(label, (char*)media->ipdata.filename, size);
+	free(media);
+done:
+	for (i = 0; i < HAMMER2_NUM_VOLHDRS; i++)
+		free(vols[i]);
+
+	return (error);
+}
+
+int
+fstyp_hammer2(FILE *fp, char *label, size_t size)
+{
+	hammer2_volume_data_t *voldata;
+	int error = 1;
+
+	voldata = __read_voldata(fp);
+	if (__test_voldata(voldata))
+		goto done;
+
+	error = __read_label(fp, label, size);
+done:
+	free(voldata);
+	return (error);
+}