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Ivan Voras  committed 7d3e88f

Imported and renamed ggatel

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+# $FreeBSD$
+
+.PATH: /usr/src/sbin/ggate/shared
+
+PROG=	ggvd
+MAN=	ggvd.8
+SRCS=	ggvd.c ggate.c
+
+CFLAGS+= -DLIBGEOM
+CFLAGS+= -I /usr/src/sbin/ggate/shared
+
+DPADD=	${LIBGEOM} ${LIBSBUF} ${LIBBSDXML} ${LIBUTIL}
+LDADD=	-lgeom -lsbuf -lbsdxml -lutil
+
+.include <bsd.prog.mk>
+.\" 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.
+.\"
+.\" $FreeBSD: src/sbin/ggate/ggatel/ggatel.8,v 1.6.2.1 2011/09/23 00:51:37 kensmith Exp $
+.\"
+.Dd April 2, 2011
+.Dt GGATEL 8
+.Os
+.Sh NAME
+.Nm ggatel
+.Nd "GEOM Gate local control utility"
+.Sh SYNOPSIS
+.Nm
+.Cm create
+.Op Fl v
+.Op Fl o Cm ro | wo | rw
+.Op Fl s Ar sectorsize
+.Op Fl t Ar timeout
+.Op Fl u Ar unit
+.Ar path
+.Nm
+.Cm attach
+.Op Fl v
+.Op Fl o Cm ro | wo | rw
+.Fl u Ar unit
+.Ar path
+.Nm
+.Cm destroy
+.Op Fl f
+.Fl u Ar unit
+.Nm
+.Cm list
+.Op Fl v
+.Op Fl u Ar unit
+.Sh DESCRIPTION
+The
+.Nm
+utility is a local GEOM Gate class consumer.
+It can be used as a replacement for
+.Xr md 4
+devices or as a
+.Dq GEOMificator
+for non GEOM-aware devices, but it was mainly created as an example
+on how to use and how to communicate with the GEOM Gate kernel module.
+.Pp
+Available commands:
+.Bl -tag -width ".Cm destroy"
+.It Cm create
+Create a
+.Nm ggate
+provider related to the given regular file or device.
+.It Cm attach
+Attach a worker process to an existing
+.Nm ggate
+provider.
+.It Cm destroy
+Destroy the given
+.Nm ggate
+provider.
+.It Cm list
+List
+.Nm ggate
+providers.
+.El
+.Pp
+Available options:
+.Bl -tag -width ".Fl s Cm ro | wo | rw"
+.It Fl f
+Forcibly destroy
+.Nm ggate
+provider (cancels all pending requests).
+.It Fl o Cm ro | wo | rw
+Specify permission to use when opening the file or device: read-only
+.Pq Cm ro ,
+write-only
+.Pq Cm wo ,
+or read-write
+.Pq Cm rw .
+Default is
+.Cm rw .
+.It Fl s Ar sectorsize
+Sector size for
+.Nm ggate
+provider.
+If not specified, it is taken from device, or set to 512 bytes for files.
+.It Fl t Ar timeout
+Number of seconds to wait before an I/O request will be canceled.
+0 means no timeout.
+Default is 30.
+.It Fl u Ar unit
+Unit number to use.
+.It Fl v
+Do not fork, run in foreground and print debug informations on standard
+output.
+.It Ar path
+Path to a regular file or device.
+.El
+.Sh EXIT STATUS
+Exit status is 0 on success, or 1 if the command fails.
+To get details about the failure,
+.Nm
+should be called with the
+.Fl v
+option.
+.Sh EXAMPLES
+.Dq GEOMify
+the
+.Dq Li fd0
+device and use
+.Xr gbde 8
+to encrypt data on a floppy.
+.Bd -literal -offset indent
+ggatel create -u 5 /dev/fd0
+gbde init /dev/ggate5
+gbde attach ggate5
+newfs /dev/ggate5.bde
+mount /dev/ggate5.bde /secret
+cp /private/foo /secret/
+umount /secret
+gbde detach ggate5
+ggatel destroy -u 5
+.Ed
+.Sh SEE ALSO
+.Xr geom 4 ,
+.Xr gbde 8 ,
+.Xr ggatec 8 ,
+.Xr ggated 8 ,
+.Xr mount 8 ,
+.Xr newfs 8
+.Sh AUTHORS
+The
+.Nm
+utility as well as this manual page was written by
+.An Pawel Jakub Dawidek Aq pjd@FreeBSD.org .
+/*-
+ * Copyright (c) 2012 Ivan Voras <ivoras@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 <stdio.h>
+#include <stdlib.h>
+#include <stdint.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <string.h>
+#include <err.h>
+#include <errno.h>
+#include <assert.h>
+#include <sys/param.h>
+#include <sys/time.h>
+#include <sys/bio.h>
+#include <sys/disk.h>
+#include <sys/ioctl.h>
+#include <sys/stat.h>
+#include <sys/syslog.h>
+
+#include <geom/gate/g_gate.h>
+#include "ggate.h"
+
+
+enum { UNSET, CREATE, DESTROY, LIST, RESCUE } action = UNSET;
+
+static const char *path = NULL;
+static int unit = G_GATE_UNIT_AUTO;
+static unsigned flags = 0;
+static int force = 0;
+static unsigned sectorsize = 0;
+static unsigned timeout = G_GATE_TIMEOUT;
+
+static void
+usage(void)
+{
+
+	fprintf(stderr, "usage: %s create [-v] [-o <ro|wo|rw>] "
+	    "[-s sectorsize] [-t timeout] [-u unit] <path>\n", getprogname());
+	fprintf(stderr, "       %s rescue [-v] [-o <ro|wo|rw>] <-u unit> "
+	    "<path>\n", getprogname());
+	fprintf(stderr, "       %s destroy [-f] <-u unit>\n", getprogname());
+	fprintf(stderr, "       %s list [-v] [-u unit]\n", getprogname());
+	exit(EXIT_FAILURE);
+}
+
+static int
+g_gate_openflags(unsigned ggflags)
+{
+
+	if ((ggflags & G_GATE_FLAG_READONLY) != 0)
+		return (O_RDONLY);
+	else if ((ggflags & G_GATE_FLAG_WRITEONLY) != 0)
+		return (O_WRONLY);
+	return (O_RDWR);
+}
+
+static void
+g_gatel_serve(int fd)
+{
+	struct g_gate_ctl_io ggio;
+	size_t bsize;
+
+	if (g_gate_verbose == 0) {
+		if (daemon(0, 0) == -1) {
+			g_gate_destroy(unit, 1);
+			err(EXIT_FAILURE, "Cannot daemonize");
+		}
+	}
+	g_gate_log(LOG_DEBUG, "Worker created: %u.", getpid());
+	ggio.gctl_version = G_GATE_VERSION;
+	ggio.gctl_unit = unit;
+	bsize = sectorsize;
+	ggio.gctl_data = malloc(bsize);
+	for (;;) {
+		int error;
+once_again:
+		ggio.gctl_length = bsize;
+		ggio.gctl_error = 0;
+		g_gate_ioctl(G_GATE_CMD_START, &ggio);
+		error = ggio.gctl_error;
+		switch (error) {
+		case 0:
+			break;
+		case ECANCELED:
+			/* Exit gracefully. */
+			free(ggio.gctl_data);
+			g_gate_close_device();
+			close(fd);
+			exit(EXIT_SUCCESS);
+		case ENOMEM:
+			/* Buffer too small. */
+			assert(ggio.gctl_cmd == BIO_DELETE ||
+			    ggio.gctl_cmd == BIO_WRITE);
+			ggio.gctl_data = realloc(ggio.gctl_data,
+			    ggio.gctl_length);
+			if (ggio.gctl_data != NULL) {
+				bsize = ggio.gctl_length;
+				goto once_again;
+			}
+			/* FALLTHROUGH */
+		case ENXIO:
+		default:
+			g_gate_xlog("ioctl(/dev/%s): %s.", G_GATE_CTL_NAME,
+			    strerror(error));
+		}
+
+		error = 0;
+		switch (ggio.gctl_cmd) {
+		case BIO_READ:
+			if ((size_t)ggio.gctl_length > bsize) {
+				ggio.gctl_data = realloc(ggio.gctl_data,
+				    ggio.gctl_length);
+				if (ggio.gctl_data != NULL)
+					bsize = ggio.gctl_length;
+				else
+					error = ENOMEM;
+			}
+			if (error == 0) {
+				if (pread(fd, ggio.gctl_data, ggio.gctl_length,
+				    ggio.gctl_offset) == -1) {
+					error = errno;
+				}
+			}
+			break;
+		case BIO_DELETE:
+		case BIO_WRITE:
+			if (pwrite(fd, ggio.gctl_data, ggio.gctl_length,
+			    ggio.gctl_offset) == -1) {
+				error = errno;
+			}
+			break;
+		default:
+			error = EOPNOTSUPP;
+		}
+
+		ggio.gctl_error = error;
+		g_gate_ioctl(G_GATE_CMD_DONE, &ggio);
+	}
+}
+
+static void
+g_gatel_create(void)
+{
+	struct g_gate_ctl_create ggioc;
+	int fd;
+
+	fd = open(path, g_gate_openflags(flags) | O_DIRECT | O_FSYNC);
+	if (fd == -1)
+		err(EXIT_FAILURE, "Cannot open %s", path);
+	ggioc.gctl_version = G_GATE_VERSION;
+	ggioc.gctl_unit = unit;
+	ggioc.gctl_mediasize = g_gate_mediasize(fd);
+	if (sectorsize == 0)
+		sectorsize = g_gate_sectorsize(fd);
+	ggioc.gctl_sectorsize = sectorsize;
+	ggioc.gctl_timeout = timeout;
+	ggioc.gctl_flags = flags;
+	ggioc.gctl_maxcount = 0;
+	strlcpy(ggioc.gctl_info, path, sizeof(ggioc.gctl_info));
+	g_gate_ioctl(G_GATE_CMD_CREATE, &ggioc);
+	if (unit == -1)
+		printf("%s%u\n", G_GATE_PROVIDER_NAME, ggioc.gctl_unit);
+	unit = ggioc.gctl_unit;
+	g_gatel_serve(fd);
+}
+
+static void
+g_gatel_rescue(void)
+{
+	struct g_gate_ctl_cancel ggioc;
+	int fd;
+
+	fd = open(path, g_gate_openflags(flags));
+	if (fd == -1)
+		err(EXIT_FAILURE, "Cannot open %s", path);
+
+	ggioc.gctl_version = G_GATE_VERSION;
+	ggioc.gctl_unit = unit;
+	ggioc.gctl_seq = 0;
+	g_gate_ioctl(G_GATE_CMD_CANCEL, &ggioc);
+
+	g_gatel_serve(fd);
+}
+
+int
+main(int argc, char *argv[])
+{
+
+	if (argc < 2)
+		usage();
+	if (strcasecmp(argv[1], "create") == 0)
+		action = CREATE;
+	else if (strcasecmp(argv[1], "rescue") == 0)
+		action = RESCUE;
+	else if (strcasecmp(argv[1], "destroy") == 0)
+		action = DESTROY;
+	else if (strcasecmp(argv[1], "list") == 0)
+		action = LIST;
+	else
+		usage();
+	argc -= 1;
+	argv += 1;
+	for (;;) {
+		int ch;
+
+		ch = getopt(argc, argv, "fo:s:t:u:v");
+		if (ch == -1)
+			break;
+		switch (ch) {
+		case 'f':
+			if (action != DESTROY)
+				usage();
+			force = 1;
+			break;
+		case 'o':
+			if (action != CREATE && action != RESCUE)
+				usage();
+			if (strcasecmp("ro", optarg) == 0)
+				flags = G_GATE_FLAG_READONLY;
+			else if (strcasecmp("wo", optarg) == 0)
+				flags = G_GATE_FLAG_WRITEONLY;
+			else if (strcasecmp("rw", optarg) == 0)
+				flags = 0;
+			else {
+				errx(EXIT_FAILURE,
+				    "Invalid argument for '-o' option.");
+			}
+			break;
+		case 's':
+			if (action != CREATE)
+				usage();
+			errno = 0;
+			sectorsize = strtoul(optarg, NULL, 10);
+			if (sectorsize == 0 && errno != 0)
+				errx(EXIT_FAILURE, "Invalid sectorsize.");
+			break;
+		case 't':
+			if (action != CREATE)
+				usage();
+			errno = 0;
+			timeout = strtoul(optarg, NULL, 10);
+			if (timeout == 0 && errno != 0)
+				errx(EXIT_FAILURE, "Invalid timeout.");
+			break;
+		case 'u':
+			errno = 0;
+			unit = strtol(optarg, NULL, 10);
+			if (unit == 0 && errno != 0)
+				errx(EXIT_FAILURE, "Invalid unit number.");
+			break;
+		case 'v':
+			if (action == DESTROY)
+				usage();
+			g_gate_verbose++;
+			break;
+		default:
+			usage();
+		}
+	}
+	argc -= optind;
+	argv += optind;
+
+	switch (action) {
+	case CREATE:
+		if (argc != 1)
+			usage();
+		g_gate_load_module();
+		g_gate_open_device();
+		path = argv[0];
+		g_gatel_create();
+		break;
+	case RESCUE:
+		if (argc != 1)
+			usage();
+		if (unit == -1) {
+			fprintf(stderr, "Required unit number.\n");
+			usage();
+		}
+		g_gate_open_device();
+		path = argv[0];
+		g_gatel_rescue();
+		break;
+	case DESTROY:
+		if (unit == -1) {
+			fprintf(stderr, "Required unit number.\n");
+			usage();
+		}
+		g_gate_verbose = 1;
+		g_gate_open_device();
+		g_gate_destroy(unit, force);
+		break;
+	case LIST:
+		g_gate_list(unit, g_gate_verbose);
+		break;
+	case UNSET:
+	default:
+		usage();
+	}
+	g_gate_close_device();
+	exit(EXIT_SUCCESS);
+}