/*
 * Copyright (c) 2011-2012 The DragonFly Project.  All rights reserved.
 *
 * This code is derived from software contributed to The DragonFly Project
 * by Matthew Dillon <dillon@dragonflybsd.org>
 * by Venkatesh Srinivas <vsrinivas@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"

struct pfs_entry {
        TAILQ_ENTRY(pfs_entry) entry;
        char name[NAME_MAX+1];
        char s[NAME_MAX+1];
};

int
cmd_pfs_list(int ac, char **av)
{
        hammer2_ioc_pfs_t pfs;
        int ecode = 0;
        int fd;
        int i;
        int all = 0;
        char *pfs_id_str = NULL;
        const char *type_str;
        TAILQ_HEAD(, pfs_entry) head;
        struct pfs_entry *p, *e;

        if (ac == 1 && av[0] == NULL) {
                av = get_hammer2_mounts(&ac);
                all = 1;
        }

        for (i = 0; i < ac; ++i) {
                if ((fd = hammer2_ioctl_handle(av[i])) < 0)
                        return(1);
                bzero(&pfs, sizeof(pfs));
                TAILQ_INIT(&head);
                if (i)
                        printf("\n");

                while ((pfs.name_key = pfs.name_next) != (hammer2_key_t)-1) {
                        if (ioctl(fd, HAMMER2IOC_PFS_GET, &pfs) < 0) {
                                perror("ioctl");
                                ecode = 1;
                                break;
                        }
                        hammer2_uuid_to_str(&pfs.pfs_clid, &pfs_id_str);
                        if (pfs.pfs_type == HAMMER2_PFSTYPE_MASTER) {
                                if (pfs.pfs_subtype == HAMMER2_PFSSUBTYPE_NONE)
                                        type_str = "MASTER";
                                else
                                        type_str = hammer2_pfssubtype_to_str(
                                                pfs.pfs_subtype);
                        } else {
                                type_str = hammer2_pfstype_to_str(pfs.pfs_type);
                        }
                        e = calloc(1, sizeof(*e));
                        snprintf(e->name, sizeof(e->name), "%s", pfs.name);
                        snprintf(e->s, sizeof(e->s), "%-11s %s",
                                type_str, pfs_id_str);
                        free(pfs_id_str);
                        pfs_id_str = NULL;

                        p = TAILQ_FIRST(&head);
                        while (p) {
                                if (strcmp(e->name, p->name) <= 0) {
                                        TAILQ_INSERT_BEFORE(p, e, entry);
                                        break;
                                }
                                p = TAILQ_NEXT(p, entry);
                        }
                        if (!p)
                                TAILQ_INSERT_TAIL(&head, e, entry);
                }
                close(fd);

                printf("Type        "
                       "ClusterId (pfs_clid)                 "
                       "Label on %s\n", av[i]);
                while ((p = TAILQ_FIRST(&head)) != NULL) {
                        printf("%s %s\n", p->s, p->name);
                        TAILQ_REMOVE(&head, p, entry);
                        free(p);
                }
        }

        if (all)
                put_hammer2_mounts(ac, av);

        return (ecode);
}

int
cmd_pfs_getid(const char *sel_path, const char *name, int privateid)
{
        hammer2_ioc_pfs_t pfs;
        int ecode = 0;
        int fd;
        char *pfs_id_str = NULL;

        if ((fd = hammer2_ioctl_handle(sel_path)) < 0)
                return(1);
        bzero(&pfs, sizeof(pfs));

        snprintf(pfs.name, sizeof(pfs.name), "%s", name);
        if (ioctl(fd, HAMMER2IOC_PFS_LOOKUP, &pfs) < 0) {
                perror("ioctl");
                ecode = 1;
        } else {
                if (privateid)
                        hammer2_uuid_to_str(&pfs.pfs_fsid, &pfs_id_str);
                else
                        hammer2_uuid_to_str(&pfs.pfs_clid, &pfs_id_str);
                printf("%s\n", pfs_id_str);
                free(pfs_id_str);
                pfs_id_str = NULL;
        }
        close(fd);
        return (ecode);
}


int
cmd_pfs_create(const char *sel_path, const char *name,
               uint8_t pfs_type, const char *uuid_str)
{
        hammer2_ioc_pfs_t pfs;
        int ecode = 0;
        int fd;
        uint32_t status;

        /*
         * Default to MASTER if no uuid was specified.
         * Default to SLAVE if a uuid was specified.
         *
         * When adding masters to a cluster, the new PFS must be added as
         * a slave and then upgraded to ensure proper synchronization.
         */
        if (pfs_type == HAMMER2_PFSTYPE_NONE) {
                if (uuid_str)
                        pfs_type = HAMMER2_PFSTYPE_SLAVE;
                else
                        pfs_type = HAMMER2_PFSTYPE_MASTER;
        }

        if ((fd = hammer2_ioctl_handle(sel_path)) < 0)
                return(1);
        bzero(&pfs, sizeof(pfs));
        snprintf(pfs.name, sizeof(pfs.name), "%s", name);
        pfs.pfs_type = pfs_type;
        if (uuid_str) {
                uuid_from_string(uuid_str, &pfs.pfs_clid, &status);
        } else {
                uuid_create(&pfs.pfs_clid, &status);
        }
        if (status == uuid_s_ok)
                uuid_create(&pfs.pfs_fsid, &status);
        if (status == uuid_s_ok) {
                if (ioctl(fd, HAMMER2IOC_PFS_CREATE, &pfs) < 0) {
                        if (errno == EEXIST) {
                                fprintf(stderr,
                                        "NOTE: Typically the same name is "
                                        "used for cluster elements on "
                                        "different mounts,\n"
                                        "      but cluster elements on the "
                                        "same mount require unique names.\n"
                                        "hammer2: pfs_create(%s): already present\n",
                                        name);
                        } else {
                                fprintf(stderr, "hammer2: pfs_create(%s): %s\n",
                                       name, strerror(errno));
                        }
                        ecode = 1;
                } else {
                        printf("hammer2: pfs_create(%s): SUCCESS\n", name);
                }
        } else {
                fprintf(stderr, "hammer2: pfs_create(%s): badly formed uuid\n",
                        name);
                ecode = 1;
        }
        close(fd);
        return (ecode);
}

int
cmd_pfs_delete(const char *sel_path, char **av, int ac)
{
        hammer2_ioc_pfs_t pfs;
        int ecode = 0;
        int fd;
        int i;
        int n;
        int use_fd;
        int nmnts = 0;
        char **mnts = NULL;

        if (sel_path == NULL)
                mnts = get_hammer2_mounts(&nmnts);

        for (i = 1; i < ac; ++i) {
                int enoents = 0;
                bzero(&pfs, sizeof(pfs));
                snprintf(pfs.name, sizeof(pfs.name), "%s", av[i]);

                if (sel_path) {
                        use_fd = hammer2_ioctl_handle(sel_path);
                } else {
                        use_fd = -1;
                        for (n = 0; n < nmnts; ++n) {
                                if ((fd = hammer2_ioctl_handle(mnts[n])) < 0) {
                                        enoents++;
                                        continue;
                                }
                                if (ioctl(fd, HAMMER2IOC_PFS_LOOKUP, &pfs) < 0) {
                                        enoents++;
                                        continue;
                                }
                                if (use_fd >= 0) {
                                        fprintf(stderr,
                                                "hammer2: pfs_delete(%s): "
                                                "Duplicate PFS name, "
                                                "must specify mount\n",
                                                av[i]);
                                        close(use_fd);
                                        use_fd = -1;
                                        break;
                                }
                                use_fd = fd;
                        }
                }
                if (use_fd >= 0) {
                        if (ioctl(use_fd, HAMMER2IOC_PFS_DELETE, &pfs) < 0) {
                                printf("hammer2: pfs_delete(%s): %s\n",
                                       av[i], strerror(errno));
                                ecode = 1;
                        } else {
                                printf("hammer2: pfs_delete(%s): SUCCESS\n",
                                       av[i]);
                        }
                        close(use_fd);
                } else {
                        if (enoents == nmnts)
                                printf("hammer2: pfs_delete(%s): %s not found\n",
                                       av[i], av[i]);
                        else
                                printf("hammer2: pfs_delete(%s): FAILED\n",
                                       av[i]);
                        ecode = 1;
                }
        }
        if (mnts)
                put_hammer2_mounts(nmnts, mnts);
        return (ecode);
}