/*
 * Copyright (c) 2013 The DragonFly Project.  All rights reserved.
 *
 * This code is derived from software contributed to The DragonFly Project
 * by Matthew Dillon <dillon@dragonflybsd.org>
 *
 * 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.
 */

#include "hammer2.h"

static int cmd_setcheck_core(uint8_t check_algo, const char *path_str,
                            struct stat *st);

int
cmd_setcheck(const char *check_str, char **paths)
{
        static const char *checks[] = HAMMER2_CHECK_STRINGS;
        struct stat st;
        int check_algo;
        int ecode;
        int res;

        ecode = 0;

        if (isdigit(check_str[0])) {
                check_algo = strtol(check_str, NULL, 0);
        } else {
                check_algo = HAMMER2_CHECK_STRINGS_COUNT;
                while (--check_algo >= 0) {
                        if (strcasecmp(check_str, checks[check_algo]) == 0)
                                break;
                }
                if (check_algo < 0 && strcasecmp(check_str, "default") == 0) {
                        check_algo = HAMMER2_CHECK_XXHASH64;
                        check_str = "xxhash64";
                }
                if (check_algo < 0 && strcasecmp(check_str, "disabled") == 0) {
                        check_algo = HAMMER2_CHECK_DISABLED;
                        check_str = "disabled";
                }
                if (check_algo < 0) {
                        fprintf(stderr,
                                "Unknown check code type: %s\n",
                                check_str);
                        ecode = 3;
                }
        }

        if (ecode == 0) {
                while (*paths) {
                        if (lstat(*paths, &st) == 0) {
                                res = cmd_setcheck_core(
                                        HAMMER2_ENC_ALGO(check_algo),
                                        *paths,
                                        &st);
                                if (res)
                                        ecode = res;
                        } else {
                                printf("%s: %s\n", *paths, strerror(errno));
                                ecode = 3;
                        }
                        ++paths;
                }
        }

        return ecode;
}

static int
cmd_setcheck_core(uint8_t check_algo, const char *path_str, struct stat *st)
{
        hammer2_ioc_inode_t inode;
        int fd;
        int res;

        fd = hammer2_ioctl_handle(path_str);
        if (fd < 0) {
                res = 3;
                goto failed;
        }
        res = ioctl(fd, HAMMER2IOC_INODE_GET, &inode);
        if (res < 0) {
                fprintf(stderr,
                        "%s: HAMMER2IOC_INODE_GET: error %s\n",
                        path_str, strerror(errno));
                res = 3;
                goto failed;
        }
        printf("%s\tcheck_algo=0x%02x\n", path_str, check_algo);
        inode.flags |= HAMMER2IOC_INODE_FLAG_CHECK;
        inode.ip_data.meta.check_algo = check_algo;
        res = ioctl(fd, HAMMER2IOC_INODE_SET, &inode);
        if (res < 0) {
                fprintf(stderr,
                        "%s: HAMMER2IOC_INODE_SET: error %s\n",
                        path_str, strerror(errno));
                res = 3;
                goto failed;
        }
        res = 0;

        if (RecurseOpt && S_ISDIR(st->st_mode)) {
                DIR *dir;
                char *path;
                struct dirent *den;

                if ((dir = fdopendir(fd)) != NULL) {
                        while ((den = readdir(dir)) != NULL) {
                                if (strcmp(den->d_name, ".") == 0 ||
                                    strcmp(den->d_name, "..") == 0) {
                                        continue;
                                }
                                asprintf(&path, "%s/%s", path_str, den->d_name);
                                if (lstat(path, st) == 0)
                                        cmd_setcheck_core(check_algo, path, st);
                                free(path);
                        }
                        closedir(dir);
                }
        }
failed:
        close(fd);
        return res;
}