/*
 * Copyright (c) 2009 The DragonFly Project.  All rights reserved.
 *
 * This code is derived from software contributed to The DragonFly Project
 * by Matthew Dillon <dillon@backplane.com> and
 * Michael Neumann <mneumann@ntecs.de>
 *
 * 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.
 * 3. Neither the name of The DragonFly Project nor the names of its
 *    contributors may be used to endorse or promote products derived
 *    from this software without specific, prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS 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
 * COPYRIGHT HOLDERS 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.
 *
 */
/*
 * Volume operations:
 *
 *   - volume-add: Add new volume to HAMMER filesystem
 *   - volume-del: Remove volume from HAMMER filesystem
 *   - volume-list: List volumes making up a HAMMER filesystem
 *   - volume-blkdevs: List volumes making up a HAMMER filesystem
 *     in blkdevs format
 */

#include "hammer.h"

/*
 * volume-add <device> <filesystem>
 */
void
hammer_cmd_volume_add(char **av, int ac)
{
	struct hammer_ioc_volume ioc;
	struct volume_info *vol;
	int fd;

	if (ac != 2) {
		fprintf(stderr, "hammer volume-add <device> <filesystem>\n");
		exit(1);
	}

	char *device = av[0];
	char *filesystem = av[1];

        fd = open(filesystem, O_RDONLY);
	if (fd < 0) {
		fprintf(stderr, "hammer volume-add: unable to access %s: %s\n",
			filesystem, strerror(errno));
		exit(1);
	}

	/*
	 * Initialize and check the device
	 */
	vol = setup_volume(-1, device, 1, O_RDONLY);
	assert(vol->vol_no == -1);
	check_volume(vol);
	if (strcmp(vol->type, "DEVICE")) {
		fprintf(stderr, "Not a block device: %s\n", device);
		exit(1);
	}
	close(vol->fd);

	/*
	 * volume-add ioctl
	 */
	bzero(&ioc, sizeof(ioc));
	strncpy(ioc.device_name, device, MAXPATHLEN);
	ioc.vol_size = vol->size;
	ioc.boot_area_size = init_boot_area_size(0, ioc.vol_size);
	ioc.mem_area_size = init_mem_area_size(0, ioc.vol_size);

	if (ioctl(fd, HAMMERIOC_ADD_VOLUME, &ioc) < 0) {
		fprintf(stderr, "hammer volume-add ioctl: %s\n",
			strerror(errno));
		exit(1);
	}

	close(fd);
}

/*
 * volume-del <device> <filesystem>
 */
void
hammer_cmd_volume_del(char **av, int ac)
{
	struct hammer_ioc_volume ioc;
	int fd;

	if (ac != 2) {
		fprintf(stderr, "hammer volume-del <device> <filesystem>\n");
		exit(1);
	}


	char *device = av[0];
	char *filesystem = av[1];

        fd = open(filesystem, O_RDONLY);
	if (fd < 0) {
		fprintf(stderr, "hammer volume-del: unable to access %s: %s\n",
			filesystem, strerror(errno));
		exit(1);
	}

	/*
	 * volume-del ioctl
	 */
	bzero(&ioc, sizeof(ioc));
	strncpy(ioc.device_name, device, MAXPATHLEN);

	if (ioctl(fd, HAMMERIOC_DEL_VOLUME, &ioc) < 0) {
		fprintf(stderr, "hammer volume-del ioctl: %s\n",
			strerror(errno));
		exit(1);
	}

	close(fd);
}

static void
hammer_print_volumes(char **av, int ac, const char *cmd, const char sep)
{
	struct hammer_ioc_volume_list ioc;
	int fd;
	int i;

	if (ac != 1) {
		fprintf(stderr, "hammer %s <filesystem>\n", cmd);
		exit(1);
	}

	char *filesystem = av[0];

	fd = open(filesystem, O_RDONLY);
	if (fd < 0) {
		fprintf(stderr,
		    "hammer %s: unable to access %s: %s\n",
		    cmd, filesystem, strerror(errno));
		exit(1);
	}

	bzero(&ioc, sizeof(ioc));
	ioc.vols = malloc(HAMMER_MAX_VOLUMES *
			  sizeof(struct hammer_ioc_volume));
	if (ioc.vols == NULL) {
		fprintf(stderr,
		    "hammer %s: unable to allocate memory: %s\n",
		    cmd, strerror(errno));
		exit(1);
	}
	ioc.nvols = HAMMER_MAX_VOLUMES;

	if (ioctl(fd, HAMMERIOC_LIST_VOLUMES, &ioc) < 0) {
		fprintf(stderr, "hammer %s ioctl: %s\n",
			cmd, strerror(errno));
		free(ioc.vols);
		exit(1);
	}

	for (i = 0; i < ioc.nvols; i++) {
		printf("%s", ioc.vols[i].device_name);
		if (i != ioc.nvols - 1)
			printf("%c", sep);
	}
	printf("\n");

	free(ioc.vols);
	close(fd);
}

/*
 * volume-list <filesystem>
 */
void
hammer_cmd_volume_list(char **av, int ac, const char *cmd)
{
	hammer_print_volumes(av, ac, cmd, '\n');
}

/*
 * volume-blkdevs <filesystem>
 */
void
hammer_cmd_volume_blkdevs(char **av, int ac, const char *cmd)
{
	hammer_print_volumes(av, ac, cmd, ':');
}