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 1.3 2008/07/02 22:05:59 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_update(char **av, int ac, int doinit)
  84 {
  85         struct hammer_ioc_pseudofs_rw pfs;
  86         struct hammer_pseudofs_data pfsd;
  87         int fd;
  88
  89         if (ac == 0)
  90                 pseudofs_usage(1);
  91         bzero(&pfs, sizeof(pfs));
  92         bzero(&pfsd, sizeof(pfsd));
  93         pfs.ondisk = &pfsd;
  94         pfs.bytes = sizeof(pfsd);
  95         pfs.version = HAMMER_IOC_PSEUDOFS_VERSION;
  96
  97         printf("%s\t", av[0]);
  98         fflush(stdout);
  99         fd = open(av[0], O_RDONLY);
 100
 101         if (fd >= 0 && ioctl(fd, HAMMERIOC_GET_PSEUDOFS, &pfs) == 0) {
 102                 if (doinit) {
 103                         printf("Pseudo-fs #0x%08x created\n", pfs.pseudoid);
 104                         init_pfsd(&pfsd);
 105                 } else {
 106                         printf("\n");
 107                 }
 108                 parse_pfsd_options(av + 1, ac - 1, &pfsd);
 109                 pfs.bytes = sizeof(pfsd);
 110                 if (ioctl(fd, HAMMERIOC_SET_PSEUDOFS, &pfs) == 0) {
 111                         if (ioctl(fd, HAMMERIOC_GET_PSEUDOFS, &pfs) == 0) {
 112                                 dump_pfsd(&pfsd);
 113                         } else {
 114                                 printf("Unable to retrieve pfs configuration after successful update: %s\n", strerror(errno));
 115                                 exit(1);
 116                         }
 117                 } else {
 118                         printf("Unable to adjust pfs configuration: %s\n", strerror(errno));
 119                         exit(1);
 120                 }
 121         } else {
 122                 printf("PFS Creation failed: %s\n", strerror(errno));
 123                 exit(1);
 124         }
 125 }
 126
 127 static void
 128 init_pfsd(hammer_pseudofs_data_t pfsd)
 129 {
 130         uint32_t status;
 131
 132         pfsd->sync_beg_tid = 1;
 133         pfsd->sync_end_tid = 1;
 134         pfsd->sync_beg_ts = 0;
 135         pfsd->sync_end_ts = 0;
 136         uuid_create(&pfsd->shared_uuid, &status);
 137         uuid_create(&pfsd->unique_uuid, &status);
 138         pfsd->master_id = 0;
 139 }
 140
 141 static
 142 void
 143 dump_pfsd(hammer_pseudofs_data_t pfsd)
 144 {
 145         u_int32_t status;
 146         char *str = NULL;
 147
 148         printf("    sync-beg-tid=0x%016llx\n", pfsd->sync_beg_tid);
 149         printf("    sync-end-tid=0x%016llx\n", pfsd->sync_end_tid);
 150         uuid_to_string(&pfsd->shared_uuid, &str, &status);
 151         printf("    shared-uuid=%s\n", str);
 152         uuid_to_string(&pfsd->unique_uuid, &str, &status);
 153         printf("    unique-uuid=%s\n", str);
 154         if (pfsd->mirror_flags & HAMMER_PFSD_SLAVE) {
 155                 printf("    slave\n");
 156         } else if (pfsd->master_id < 0) {
 157                 printf("    no-mirror\n");
 158         } else {
 159                 printf("    master=%d\n", pfsd->master_id);
 160         }
 161         printf("    label=\"%s\"\n", pfsd->label);
 162 }
 163
 164 static void
 165 parse_pfsd_options(char **av, int ac, hammer_pseudofs_data_t pfsd)
 166 {
 167         char *cmd;
 168         char *ptr;
 169         int len;
 170         uint32_t status;
 171
 172         while (ac) {
 173                 cmd = *av;
 174                 if ((ptr = strchr(cmd, '=')) != NULL)
 175                         *ptr++ = 0;
 176
 177                 /*
 178                  * Basic assignment value test
 179                  */
 180                 if (strcmp(cmd, "no-mirror") == 0 ||
 181                     strcmp(cmd, "slave") == 0) {
 182                         if (ptr) {
 183                                 fprintf(stderr,
 184                                         "option %s should not have "
 185                                         "an assignment\n",
 186                                         cmd);
 187                                 exit(1);
 188                         }
 189                 } else {
 190                         if (ptr == NULL) {
 191                                 fprintf(stderr,
 192                                         "option %s requires an assignment\n",
 193                                         cmd);
 194                                 exit(1);
 195                         }
 196                 }
 197
 198                 status = uuid_s_ok;
 199                 if (strcmp(cmd, "sync-beg-tid") == 0) {
 200                         pfsd->sync_beg_tid = strtoull(ptr, NULL, 16);
 201                 } else if (strcmp(cmd, "sync-end-tid") == 0) {
 202                         pfsd->sync_end_tid = strtoull(ptr, NULL, 16);
 203                 } else if (strcmp(cmd, "shared-uuid") == 0) {
 204                         uuid_from_string(ptr, &pfsd->shared_uuid, &status);
 205                 } else if (strcmp(cmd, "unique-uuid") == 0) {
 206                         uuid_from_string(ptr, &pfsd->unique_uuid, &status);
 207                 } else if (strcmp(cmd, "master") == 0) {
 208                         pfsd->master_id = strtol(ptr, NULL, 0);
 209                         pfsd->mirror_flags &= ~HAMMER_PFSD_SLAVE;
 210                 } else if (strcmp(cmd, "slave") == 0) {
 211                         pfsd->master_id = -1;
 212                         pfsd->mirror_flags |= HAMMER_PFSD_SLAVE;
 213                 } else if (strcmp(cmd, "no-mirror") == 0) {
 214                         pfsd->master_id = -1;
 215                         pfsd->mirror_flags &= ~HAMMER_PFSD_SLAVE;
 216                 } else if (strcmp(cmd, "label") == 0) {
 217                         len = strlen(ptr);
 218                         if (ptr[0] == '"' && ptr[len-1] == '"') {
 219                                 ptr[len-1] = 0;
 220                                 ++ptr;
 221                         } else if (ptr[0] == '"') {
 222                                 fprintf(stderr,
 223                                         "option %s: malformed string\n",
 224                                         cmd);
 225                                 exit(1);
 226                         }
 227                         snprintf(pfsd->label, sizeof(pfsd->label), "%s", ptr);
 228                 } else {
 229                         fprintf(stderr, "invalid option: %s\n", cmd);
 230                         exit(1);
 231                 }
 232                 if (status != uuid_s_ok) {
 233                         fprintf(stderr, "option %s: error parsing uuid %s\n",
 234                                 cmd, ptr);
 235                         exit(1);
 236                 }
 237                 --ac;
 238                 ++av;
 239         }
 240 }
 241
 242 static
 243 void
 244 pseudofs_usage(int code)
 245 {
 246         fprintf(stderr,
 247                 "hammer pfs-status <dirpath1>...<dirpathN>\n"
 248                 "hammer pfs-create <dirpath> [options]\n"
 249                 "hammer pfs-update <dirpath> [options]\n"
 250                 "\n"
 251                 "    sync-beg-tid=0x16llx\n"
 252                 "    sync-end-tid=0x16llx\n"
 253                 "    shared-uuid=0x16llx\n"
 254                 "    unique-uuid=0x16llx\n"
 255                 "    master=0-15\n"
 256                 "    slave\n"
 257                 "    no-mirror\n"
 258                 "    label=\"string\"\n"
 259         );
 260         exit(code);
 261 }
 262