Introduce GEOM RAID3 class, i.e. kernel module, which implements RAID3

transformation and graid3(8) userland utility, which can be used for
configuration. No manual page yet, sorry.

Hardware provided by:	Daniel Seuffert

2 files changed, 351 insertions, 0 deletions

diff --git a/sbin/geom/class/raid3/Makefile b/sbin/geom/class/raid3/Makefile
new file mode 100644
index 0000000..9843746
--- /dev/null
+++ b/sbin/geom/class/raid3/Makefile
@@ -0,0 +1,11 @@
+# $FreeBSD$
+
+.PATH:	${.CURDIR}/../../misc
+
+CLASS=	raid3
+
+NOMAN=	notyet
+DPADD=	${LIBMD}
+LDADD=	-lmd
+
+.include <bsd.lib.mk>
diff --git a/sbin/geom/class/raid3/geom_raid3.c b/sbin/geom/class/raid3/geom_raid3.c
new file mode 100644
index 0000000..b45b5a7
--- /dev/null
+++ b/sbin/geom/class/raid3/geom_raid3.c
@@ -0,0 +1,340 @@
+/*-
+ * Copyright (c) 2004 Pawel Jakub Dawidek <pjd@FreeBSD.org>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+#include <sys/param.h>
+#include <errno.h>
+#include <paths.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <stdint.h>
+#include <string.h>
+#include <strings.h>
+#include <assert.h>
+#include <libgeom.h>
+#include <geom/raid3/g_raid3.h>
+#include <core/geom.h>
+#include <misc/subr.h>
+
+
+uint32_t lib_version = G_LIB_VERSION;
+uint32_t version = G_RAID3_VERSION;
+
+static void raid3_main(struct gctl_req *req, unsigned f);
+static void raid3_clear(struct gctl_req *req);
+static void raid3_dump(struct gctl_req *req);
+static void raid3_label(struct gctl_req *req);
+
+struct g_command class_commands[] = {
+	{ "clear", G_FLAG_VERBOSE, raid3_main, G_NULL_OPTS },
+	{ "configure", G_FLAG_VERBOSE, NULL,
+	    {
+		{ 'a', "autosync", NULL, G_TYPE_NONE },
+		{ 'd', "dynamic", NULL, G_TYPE_NONE },
+		{ 'h', "hardcode", NULL, G_TYPE_NONE },
+		{ 'n', "noautosync", NULL, G_TYPE_NONE },
+		G_OPT_SENTINEL
+	    }
+	},
+	{ "dump", 0, raid3_main, G_NULL_OPTS },
+	{ "insert", G_FLAG_VERBOSE, NULL,
+	    {
+		{ 'h', "hardcode", NULL, G_TYPE_NONE },
+		{ 'n', "number", NULL, G_TYPE_NUMBER },
+		G_OPT_SENTINEL
+	    }
+	},
+	{ "label", G_FLAG_VERBOSE, raid3_main,
+	    {
+		{ 'h', "hardcode", NULL, G_TYPE_NONE },
+		{ 'n', "noautosync", NULL, G_TYPE_NONE },
+		G_OPT_SENTINEL
+	    }
+	},
+	{ "rebuild", G_FLAG_VERBOSE, NULL, G_NULL_OPTS },
+	{ "remove", G_FLAG_VERBOSE, NULL,
+	    {
+		{ 'n', "number", NULL, G_TYPE_NUMBER },
+		G_OPT_SENTINEL
+	    }
+	},
+	{ "stop", G_FLAG_VERBOSE, NULL,
+	    {
+		{ 'f', "force", NULL, G_TYPE_NONE },
+		G_OPT_SENTINEL
+	    }
+	},
+	G_CMD_SENTINEL
+};
+
+static int verbose = 0;
+
+void usage(const char *);
+void
+usage(const char *comm)
+{
+	fprintf(stderr,
+	    "usage: %s label [-hnv] name prov prov prov [prov [...]]\n"
+	    "       %s clear [-v] prov [prov [...]]\n"
+	    "       %s dump prov [prov [...]]\n"
+	    "       %s configure [-adhnv] name\n"
+	    "       %s rebuild [-v] name prov\n"
+	    "       %s insert [-hv] <-n number> name prov\n"
+	    "       %s remove [-v] <-n number> name\n"
+	    "       %s stop [-fv] name\n",
+	    comm, comm, comm, comm, comm, comm, comm, comm);
+	exit(EXIT_FAILURE);
+}
+
+static void
+raid3_main(struct gctl_req *req, unsigned flags)
+{
+	const char *name;
+
+	if ((flags & G_FLAG_VERBOSE) != 0)
+		verbose = 1;
+
+	name = gctl_get_asciiparam(req, "verb");
+	if (name == NULL) {
+		gctl_error(req, "No '%s' argument.", "verb");
+		return;
+	}
+	if (strcmp(name, "label") == 0)
+		raid3_label(req);
+	else if (strcmp(name, "clear") == 0)
+		raid3_clear(req);
+	else if (strcmp(name, "dump") == 0)
+		raid3_dump(req);
+	else
+		gctl_error(req, "Unknown command: %s.", name);
+}
+
+static void
+raid3_label(struct gctl_req *req)
+{
+	struct g_raid3_metadata md;
+	u_char sector[512];
+	const char *str;
+	char param[16];
+	int *hardcode, *nargs, *noautosync, error, i;
+	unsigned sectorsize;
+	off_t mediasize;
+
+	nargs = gctl_get_paraml(req, "nargs", sizeof(*nargs));
+	if (nargs == NULL) {
+		gctl_error(req, "No '%s' argument.", "nargs");
+		return;
+	}
+	if (*nargs < 4) {
+		gctl_error(req, "Too few arguments.");
+		return;
+	}
+#ifndef BITCOUNT
+#define	BITCOUNT(x)	(((BX_(x) + (BX_(x) >> 4)) & 0x0F0F0F0F) % 255)
+#define	BX_(x)		((x) - (((x) >> 1) & 0x77777777) -		\
+			 (((x) >> 2) & 0x33333333) - (((x) >> 3) & 0x11111111))
+#endif
+	if (BITCOUNT(*nargs - 2) != 1) {
+		gctl_error(req, "Invalid number of components.");
+		return;
+	}
+
+	strlcpy(md.md_magic, G_RAID3_MAGIC, sizeof(md.md_magic));
+	md.md_version = G_RAID3_VERSION;
+	str = gctl_get_asciiparam(req, "arg0");
+	if (str == NULL) {
+		gctl_error(req, "No 'arg%u' argument.", 0);
+		return;
+	}
+	strlcpy(md.md_name, str, sizeof(md.md_name));
+	md.md_all = *nargs - 1;
+	md.md_mflags = 0;
+	md.md_dflags = 0;
+	md.md_syncid = 1;
+	md.md_sync_offset = 0;
+	noautosync = gctl_get_paraml(req, "noautosync", sizeof(*noautosync));
+	if (noautosync == NULL) {
+		gctl_error(req, "No '%s' argument.", "noautosync");
+		return;
+	}
+	if (*noautosync)
+		md.md_mflags |= G_RAID3_DEVICE_FLAG_NOAUTOSYNC;
+	hardcode = gctl_get_paraml(req, "hardcode", sizeof(*hardcode));
+	if (hardcode == NULL) {
+		gctl_error(req, "No '%s' argument.", "hardcode");
+		return;
+	}
+
+	/*
+	 * Calculate sectorsize by finding least common multiple from
+	 * sectorsizes of every disk and find the smallest mediasize.
+	 */
+	mediasize = 0;
+	sectorsize = 0;
+	for (i = 1; i < *nargs; i++) {
+		unsigned ssize;
+		off_t msize;
+
+		snprintf(param, sizeof(param), "arg%u", i);
+		str = gctl_get_asciiparam(req, param);
+
+		msize = g_get_mediasize(str);
+		ssize = g_get_sectorsize(str);
+		if (msize == 0 || ssize == 0) {
+			gctl_error(req, "Can't get informations about %s: %s.",
+			    str, strerror(errno));
+			return;
+		}
+		msize -= ssize;
+		if (mediasize == 0 || (mediasize > 0 && msize < mediasize))
+			mediasize = msize;
+		if (sectorsize == 0)
+			sectorsize = ssize;
+		else
+			sectorsize = g_lcm(sectorsize, ssize);
+	}
+	md.md_mediasize = mediasize * (*nargs - 2);
+	md.md_sectorsize = sectorsize * (*nargs - 2);
+
+	/*
+	 * Clear last sector first, to spoil all components if device exists.
+	 */
+	for (i = 1; i < *nargs; i++) {
+		snprintf(param, sizeof(param), "arg%u", i);
+		str = gctl_get_asciiparam(req, param);
+
+		error = g_metadata_clear(str, NULL);
+		if (error != 0) {
+			gctl_error(req, "Can't store metadata on %s: %s.", str,
+			    strerror(error));
+			return;
+		}
+	}
+
+	/*
+	 * Ok, store metadata (use disk number as priority).
+	 */
+	for (i = 1; i < *nargs; i++) {
+		snprintf(param, sizeof(param), "arg%u", i);
+		str = gctl_get_asciiparam(req, param);
+
+		md.md_no = i - 1;
+		if (!*hardcode)
+			bzero(md.md_provider, sizeof(md.md_provider));
+		else {
+			if (strncmp(str, _PATH_DEV, strlen(_PATH_DEV)) == 0)
+				str += strlen(_PATH_DEV);
+			strlcpy(md.md_provider, str, sizeof(md.md_provider));
+		}
+		raid3_metadata_encode(&md, sector);
+		error = g_metadata_store(str, sector, sizeof(sector));
+		if (error != 0) {
+			fprintf(stderr, "Can't store metadata on %s: %s.\n",
+			    str, strerror(error));
+			gctl_error(req, "Not fully done.");
+			continue;
+		}
+		if (verbose)
+			printf("Metadata value stored on %s.\n", str);
+	}
+}
+
+static void
+raid3_clear(struct gctl_req *req)
+{
+	const char *name;
+	char param[16];
+	int *nargs, error, i;
+
+	nargs = gctl_get_paraml(req, "nargs", sizeof(*nargs));
+	if (nargs == NULL) {
+		gctl_error(req, "No '%s' argument.", "nargs");
+		return;
+	}
+	if (*nargs < 1) {
+		gctl_error(req, "Too few arguments.");
+		return;
+	}
+
+	for (i = 0; i < *nargs; i++) {
+		snprintf(param, sizeof(param), "arg%u", i);
+		name = gctl_get_asciiparam(req, param);
+
+		error = g_metadata_clear(name, G_RAID3_MAGIC);
+		if (error != 0) {
+			fprintf(stderr, "Can't clear metadata on %s: %s.\n",
+			    name, strerror(error));
+			gctl_error(req, "Not fully done.");
+			continue;
+		}
+		if (verbose)
+			printf("Metadata cleared on %s.\n", name); 
+	}
+}
+
+static void
+raid3_dump(struct gctl_req *req)
+{
+	struct g_raid3_metadata md, tmpmd;
+	const char *name;
+	char param[16];
+	int *nargs, error, i;
+
+	nargs = gctl_get_paraml(req, "nargs", sizeof(*nargs));
+	if (nargs == NULL) {
+		gctl_error(req, "No '%s' argument.", "nargs");
+		return;
+	}
+	if (*nargs < 1) {
+		gctl_error(req, "Too few arguments.");
+		return;
+	}
+
+	for (i = 0; i < *nargs; i++) {
+		snprintf(param, sizeof(param), "arg%u", i);
+		name = gctl_get_asciiparam(req, param);
+
+		error = g_metadata_read(name, (u_char *)&tmpmd, sizeof(tmpmd),
+		    G_RAID3_MAGIC);
+		if (error != 0) {
+			fprintf(stderr, "Can't read metadata from %s: %s.\n",
+			    name, strerror(error));
+			gctl_error(req, "Not fully done.");
+			continue;
+		}
+		if (raid3_metadata_decode((u_char *)&tmpmd, &md) != 0) {
+			fprintf(stderr, "MD5 hash mismatch for %s, skipping.\n",
+			    name);
+			gctl_error(req, "Not fully done.");
+			continue;
+		}
+		printf("Metadata on %s:\n", name);
+		raid3_metadata_dump(&md);
+		printf("\n");
+	}
+}