sbin/hammer/cmd_pseudofs.c

   1 /*
   2  * Copyright (c) 2008 The DragonFly Project.  All rights reserved.
   3  *
   4  * This code is derived from software contributed to The DragonFly Project
   5  * by Matthew Dillon <dillon@backplane.com>
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  *
  11  * 1. Redistributions of source code must retain the above copyright
  12  *    notice, this list of conditions and the following disclaimer.
  13  * 2. Redistributions in binary form must reproduce the above copyright
  14  *    notice, this list of conditions and the following disclaimer in
  15  *    the documentation and/or other materials provided with the
  16  *    distribution.
  17  * 3. Neither the name of The DragonFly Project nor the names of its
  18  *    contributors may be used to endorse or promote products derived
  19  *    from this software without specific, prior written permission.
  20  *
  21  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  22  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  23  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
  24  * FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE
  25  * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
  26  * INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING,
  27  * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  28  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
  29  * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
  30  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
  31  * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  32  * SUCH DAMAGE.
  33  *
  34  * $DragonFly: src/sbin/hammer/cmd_pseudofs.c,v 1.4 2008/07/07 00:27:22 dillon Exp $
  35  */
  36
  37 #include "hammer.h"
  38
  39 static void parse_pfsd_options(char **av, int ac, hammer_pseudofs_data_t pfsd);
  40 static void init_pfsd(hammer_pseudofs_data_t pfsd);
  41 static void dump_pfsd(hammer_pseudofs_data_t pfsd);
  42 static void pseudofs_usage(int code);
  43
  44 void
  45 hammer_cmd_pseudofs_status(char **av, int ac)
  46 {
  47         struct hammer_ioc_pseudofs_rw pfs;
  48         struct hammer_pseudofs_data pfsd;
  49         int i;
  50         int fd;
  51
  52         for (i = 0; i < ac; ++i) {
  53                 bzero(&pfsd, sizeof(pfsd));
  54                 bzero(&pfs, sizeof(pfs));
  55                 pfs.ondisk = &pfsd;
  56                 pfs.bytes = sizeof(pfsd);
  57                 printf("%s\t", av[i]);
  58                 fd = open(av[i], O_RDONLY);
  59                 if (fd < 0 || ioctl(fd, HAMMERIOC_GET_PSEUDOFS, &pfs) < 0) {
  60                         printf("Not a HAMMER root\n");
  61                 } else {
  62                         printf("Pseudo-fs #0x%08x {\n", pfs.pseudoid);
  63                         dump_pfsd(&pfsd);
  64                         printf("}\n");
  65                 }
  66         }
  67 }
  68
  69 void
  70 hammer_cmd_pseudofs_create(char **av, int ac)
  71 {
  72         if (ac == 0)
  73                 pseudofs_usage(1);
  74
  75         if (mknod(av[0], S_IFDIR|0777, 0) < 0) {
  76                 perror("mknod (create pseudofs):");
  77                 exit(1);
  78         }
  79         hammer_cmd_pseudofs_update(av, ac, 1);
  80 }
  81
  82 void
  83 hammer_cmd_pseudofs_destroy(char **av, int ac)
  84 {
  85         fprintf(stderr, "pfs-destroy not implemented yet\n");
  86 }
  87
  88 void
  89 hammer_cmd_pseudofs_update(char **av, int ac, int doinit)
  90 {
  91         struct hammer_ioc_pseudofs_rw pfs;
  92         struct hammer_pseudofs_data pfsd;
  93         int fd;
  94
  95         if (ac == 0)
  96                 pseudofs_usage(1);
  97         bzero(&pfs, sizeof(pfs));
  98         bzero(&pfsd, sizeof(pfsd));
  99         pfs.ondisk = &pfsd;
 100         pfs.bytes = sizeof(pfsd);
 101         pfs.version = HAMMER_IOC_PSEUDOFS_VERSION;
 102
 103         printf("%s\t", av[0]);
 104         fflush(stdout);
 105         fd = open(av[0], O_RDONLY);
 106
 107         if (fd >= 0 && ioctl(fd, HAMMERIOC_GET_PSEUDOFS, &pfs) == 0) {
 108                 if (doinit) {
 109                         printf("Pseudo-fs #0x%08x created\n", pfs.pseudoid);
 110                         init_pfsd(&pfsd);
 111                 } else {
 112                         printf("\n");
 113                 }
 114                 parse_pfsd_options(av + 1, ac - 1, &pfsd);
 115                 pfs.bytes = sizeof(pfsd);
 116                 if (ioctl(fd, HAMMERIOC_SET_PSEUDOFS, &pfs) == 0) {
 117                         if (ioctl(fd, HAMMERIOC_GET_PSEUDOFS, &pfs) == 0) {
 118                                 dump_pfsd(&pfsd);
 119                         } else {
 120                                 printf("Unable to retrieve pfs configuration after successful update: %s\n", strerror(errno));
 121                                 exit(1);
 122                         }
 123                 } else {
 124                         printf("Unable to adjust pfs configuration: %s\n", strerror(errno));
 125                         exit(1);
 126                 }
 127         } else {
 128                 printf("PFS Creation failed: %s\n", strerror(errno));
 129                 exit(1);
 130         }
 131 }
 132
 133 static void
 134 init_pfsd(hammer_pseudofs_data_t pfsd)
 135 {
 136         uint32_t status;
 137
 138         pfsd->sync_beg_tid = 1;
 139         pfsd->sync_end_tid = 1;
 140         pfsd->sync_beg_ts = 0;
 141         pfsd->sync_end_ts = 0;
 142         uuid_create(&pfsd->shared_uuid, &status);
 143         uuid_create(&pfsd->unique_uuid, &status);
 144         pfsd->master_id = 0;
 145 }
 146
 147 static
 148 void
 149 dump_pfsd(hammer_pseudofs_data_t pfsd)
 150 {
 151         u_int32_t status;
 152         char *str = NULL;
 153
 154         printf("    sync-beg-tid=0x%016llx\n", pfsd->sync_beg_tid);
 155         printf("    sync-end-tid=0x%016llx\n", pfsd->sync_end_tid);
 156         uuid_to_string(&pfsd->shared_uuid, &str, &status);
 157         printf("    shared-uuid=%s\n", str);
 158         uuid_to_string(&pfsd->unique_uuid, &str, &status);
 159         printf("    unique-uuid=%s\n", str);
 160         if (pfsd->mirror_flags & HAMMER_PFSD_SLAVE) {
 161                 printf("    slave\n");
 162         } else if (pfsd->master_id < 0) {
 163                 printf("    no-mirror\n");
 164         } else {
 165                 printf("    master=%d\n", pfsd->master_id);
 166         }
 167         printf("    label=\"%s\"\n", pfsd->label);
 168 }
 169
 170 static void
 171 parse_pfsd_options(char **av, int ac, hammer_pseudofs_data_t pfsd)
 172 {
 173         char *cmd;
 174         char *ptr;
 175         int len;
 176         uint32_t status;
 177
 178         while (ac) {
 179                 cmd = *av;
 180                 if ((ptr = strchr(cmd, '=')) != NULL)
 181                         *ptr++ = 0;
 182
 183                 /*
 184                  * Basic assignment value test
 185                  */
 186                 if (strcmp(cmd, "no-mirror") == 0 ||
 187                     strcmp(cmd, "slave") == 0) {
 188                         if (ptr) {
 189                                 fprintf(stderr,
 190                                         "option %s should not have "
 191                                         "an assignment\n",
 192                                         cmd);
 193                                 exit(1);
 194                         }
 195                 } else {
 196                         if (ptr == NULL) {
 197                                 fprintf(stderr,
 198                                         "option %s requires an assignment\n",
 199                                         cmd);
 200                                 exit(1);
 201                         }
 202                 }
 203
 204                 status = uuid_s_ok;
 205                 if (strcmp(cmd, "sync-beg-tid") == 0) {
 206                         pfsd->sync_beg_tid = strtoull(ptr, NULL, 16);
 207                 } else if (strcmp(cmd, "sync-end-tid") == 0) {
 208                         pfsd->sync_end_tid = strtoull(ptr, NULL, 16);
 209                 } else if (strcmp(cmd, "shared-uuid") == 0) {
 210                         uuid_from_string(ptr, &pfsd->shared_uuid, &status);
 211                 } else if (strcmp(cmd, "unique-uuid") == 0) {
 212                         uuid_from_string(ptr, &pfsd->unique_uuid, &status);
 213                 } else if (strcmp(cmd, "master") == 0) {
 214                         pfsd->master_id = strtol(ptr, NULL, 0);
 215                         pfsd->mirror_flags &= ~HAMMER_PFSD_SLAVE;
 216                 } else if (strcmp(cmd, "slave") == 0) {
 217                         pfsd->master_id = -1;
 218                         pfsd->mirror_flags |= HAMMER_PFSD_SLAVE;
 219                 } else if (strcmp(cmd, "no-mirror") == 0) {
 220                         pfsd->master_id = -1;
 221                         pfsd->mirror_flags &= ~HAMMER_PFSD_SLAVE;
 222                 } else if (strcmp(cmd, "label") == 0) {
 223                         len = strlen(ptr);
 224                         if (ptr[0] == '"' && ptr[len-1] == '"') {
 225                                 ptr[len-1] = 0;
 226                                 ++ptr;
 227                         } else if (ptr[0] == '"') {
 228                                 fprintf(stderr,
 229                                         "option %s: malformed string\n",
 230                                         cmd);
 231                                 exit(1);
 232                         }
 233                         snprintf(pfsd->label, sizeof(pfsd->label), "%s", ptr);
 234                 } else {
 235                         fprintf(stderr, "invalid option: %s\n", cmd);
 236                         exit(1);
 237                 }
 238                 if (status != uuid_s_ok) {
 239                         fprintf(stderr, "option %s: error parsing uuid %s\n",
 240                                 cmd, ptr);
 241                         exit(1);
 242                 }
 243                 --ac;
 244                 ++av;
 245         }
 246 }
 247
 248 static
 249 void
 250 pseudofs_usage(int code)
 251 {
 252         fprintf(stderr,
 253                 "hammer pfs-status <dirpath1>...<dirpathN>\n"
 254                 "hammer pfs-create <dirpath> [options]\n"
 255                 "hammer pfs-update <dirpath> [options]\n"
 256                 "\n"
 257                 "    sync-beg-tid=0x16llx\n"
 258                 "    sync-end-tid=0x16llx\n"
 259                 "    shared-uuid=0x16llx\n"
 260                 "    unique-uuid=0x16llx\n"
 261                 "    master=0-15\n"
 262                 "    slave\n"
 263                 "    no-mirror\n"
 264                 "    label=\"string\"\n"
 265         );
 266         exit(code);
 267 }
 268