/*-
 * SPDX-License-Identifier: BSD-2-Clause
 *
 * Copyright (c) 2004-2005 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/param.h>
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <strings.h>
#include <assert.h>
#include <libgeom.h>
#include <geom/label/g_label.h>

#include "core/geom.h"
#include "misc/subr.h"

#ifdef STATIC_GEOM_CLASSES
#define PUBSYM(x)       glabel_##x
#else
#define PUBSYM(x)       x
#endif

uint32_t PUBSYM(lib_version) = G_LIB_VERSION;
uint32_t PUBSYM(version) = G_LABEL_VERSION;

static void label_main(struct gctl_req *req, unsigned flags);
static void label_clear(struct gctl_req *req);
static void label_dump(struct gctl_req *req);
static void label_label(struct gctl_req *req);
static void label_refresh(struct gctl_req *req);

struct g_command PUBSYM(class_commands)[] = {
        { "clear", G_FLAG_VERBOSE, label_main, G_NULL_OPTS,
            "[-v] dev ..."
        },
        { "create", G_FLAG_VERBOSE | G_FLAG_LOADKLD, NULL, G_NULL_OPTS,
            "[-v] name dev"
        },
        { "destroy", G_FLAG_VERBOSE, NULL,
            {
                { 'f', "force", NULL, G_TYPE_BOOL },
                G_OPT_SENTINEL
            },
            "[-fv] name ..."
        },
        { "dump", 0, label_main, G_NULL_OPTS,
            "dev ..."
        },
        { "label", G_FLAG_VERBOSE | G_FLAG_LOADKLD, label_main, G_NULL_OPTS,
            "[-v] name dev"
        },
        { "refresh", 0, label_main, G_NULL_OPTS,
            "dev ..."
        },
        { "stop", G_FLAG_VERBOSE, NULL,
            {
                { 'f', "force", NULL, G_TYPE_BOOL },
                G_OPT_SENTINEL
            },
            "[-fv] name ..."
        },
        G_CMD_SENTINEL
};

static int verbose = 0;

static void
label_main(struct gctl_req *req, unsigned flags)
{
        const char *name;

        if ((flags & G_FLAG_VERBOSE) != 0)
                verbose = 1;

        name = gctl_get_ascii(req, "verb");
        if (name == NULL) {
                gctl_error(req, "No '%s' argument.", "verb");
                return;
        }
        if (strcmp(name, "label") == 0)
                label_label(req);
        else if (strcmp(name, "clear") == 0)
                label_clear(req);
        else if (strcmp(name, "dump") == 0)
                label_dump(req);
        else if (strcmp(name, "refresh") == 0)
                label_refresh(req);
        else
                gctl_error(req, "Unknown command: %s.", name);
}

static void
label_label(struct gctl_req *req)
{
        struct g_label_metadata md;
        const char *name, *label;
        u_char sector[512];
        int error, nargs;

        bzero(sector, sizeof(sector));
        nargs = gctl_get_int(req, "nargs");
        if (nargs != 2) {
                gctl_error(req, "Invalid number of arguments.");
                return;
        }

        /*
         * Clear last sector first to spoil all components if device exists.
         */
        name = gctl_get_ascii(req, "arg1");
        error = g_metadata_clear(name, NULL);
        if (error != 0) {
                gctl_error(req, "Can't store metadata on %s: %s.", name,
                    strerror(error));
                return;
        }

        strlcpy(md.md_magic, G_LABEL_MAGIC, sizeof(md.md_magic));
        md.md_version = G_LABEL_VERSION;
        label = gctl_get_ascii(req, "arg0");
        bzero(md.md_label, sizeof(md.md_label));
        strlcpy(md.md_label, label, sizeof(md.md_label));
        md.md_provsize = g_get_mediasize(name);
        if (md.md_provsize == 0) {
                gctl_error(req, "Can't get mediasize of %s: %s.", name,
                    strerror(errno));
                return;
        }

        /*
         * Ok, store metadata.
         */
        label_metadata_encode(&md, sector);
        error = g_metadata_store(name, sector, sizeof(sector));
        if (error != 0) {
                fprintf(stderr, "Can't store metadata on %s: %s.\n", name,
                    strerror(error));
                gctl_error(req, "Not done.");
        }
        if (verbose)
                printf("Metadata value stored on %s.\n", name);
}

static void
label_clear(struct gctl_req *req)
{
        const char *name;
        int error, i, nargs;

        nargs = gctl_get_int(req, "nargs");
        if (nargs < 1) {
                gctl_error(req, "Too few arguments.");
                return;
        }

        for (i = 0; i < nargs; i++) {
                name = gctl_get_ascii(req, "arg%d", i);
                error = g_metadata_clear(name, G_LABEL_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
label_metadata_dump(const struct g_label_metadata *md)
{

        printf("    Magic string: %s\n", md->md_magic);
        printf("Metadata version: %u\n", (u_int)md->md_version);
        printf("           Label: %s\n", md->md_label);
}

static void
label_dump(struct gctl_req *req)
{
        struct g_label_metadata md, tmpmd;
        const char *name;
        int error, i, nargs;

        nargs = gctl_get_int(req, "nargs");
        if (nargs < 1) {
                gctl_error(req, "Too few arguments.");
                return;
        }

        for (i = 0; i < nargs; i++) {
                name = gctl_get_ascii(req, "arg%d", i);
                error = g_metadata_read(name, (u_char *)&tmpmd, sizeof(tmpmd),
                    G_LABEL_MAGIC);
                if (error != 0) {
                        fprintf(stderr, "Can't read metadata from %s: %s.\n",
                            name, strerror(error));
                        gctl_error(req, "Not fully done.");
                        continue;
                }
                label_metadata_decode((u_char *)&tmpmd, &md);
                printf("Metadata on %s:\n", name);
                label_metadata_dump(&md);
                printf("\n");
        }
}

static void
label_refresh(struct gctl_req *req)
{
        const char *name;
        int i, nargs, fd;

        nargs = gctl_get_int(req, "nargs");
        if (nargs < 1) {
                gctl_error(req, "Too few arguments.");
                return;
        }

        for (i = 0; i < nargs; i++) {
                name = gctl_get_ascii(req, "arg%d", i);
                fd = g_open(name, 1);
                if (fd == -1) {
                        printf("Can't refresh metadata from %s: %s.\n",
                            name, strerror(errno));
                } else {
                        printf("Metadata from %s refreshed.\n", name);
                        (void)g_close(fd);
                }
        }
}