usr/src/cmd/iscsitsvc/iscsitsvc.c

   1 /*
   2  * CDDL HEADER START
   3  *
   4  * The contents of this file are subject to the terms of the
   5  * Common Development and Distribution License (the "License").
   6  * You may not use this file except in compliance with the License.
   7  *
   8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
   9  * or http://www.opensolaris.org/os/licensing.
  10  * See the License for the specific language governing permissions
  11  * and limitations under the License.
  12  *
  13  * When distributing Covered Code, include this CDDL HEADER in each
  14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  15  * If applicable, add the following below this CDDL HEADER, with the
  16  * fields enclosed by brackets "[]" replaced with your own identifying
  17  * information: Portions Copyright [yyyy] [name of copyright owner]
  18  *
  19  * CDDL HEADER END
  20  */
  21 /*
  22  * Copyright 2008 Sun Microsystems, Inc.  All rights reserved.
  23  * Use is subject to license terms.
  24  */
  25
  26 #include <stdlib.h>
  27 #include <stdio.h>
  28 #include <strings.h>
  29 #include <sys/types.h>
  30 #include <unistd.h>
  31 #include <stropts.h>
  32 #include <libintl.h>
  33 #include <errno.h>
  34 #include <time.h>
  35 #include <string.h>
  36 #include <assert.h>
  37 #include <getopt.h>
  38 #include <cmdparse.h>
  39 #include <signal.h>
  40 #include <pthread.h>
  41 #include <fcntl.h>
  42 #include <locale.h>
  43 #include <sys/systeminfo.h>
  44
  45 #include <libiscsit.h>
  46 #include <sys/iscsit/iscsit_common.h>
  47
  48 static int it_enable(int, char **, cmdOptions_t *, void *);
  49 static int it_disable(int, char **, cmdOptions_t *, void *);
  50
  51 /*
  52  *  MAJOR - This should only change when there is an incompatible change made
  53  *  to the interfaces or the output.
  54  *
  55  *  MINOR - This should change whenever there is a new command or new feature
  56  *  with no incompatible change.
  57  */
  58 #define VERSION_STRING_MAJOR        "1"
  59 #define VERSION_STRING_MINOR        "0"
  60 #define VERSION_STRING_MAX_LEN      10
  61
  62 /* 10 ms sleep in nanoseconds */
  63 #define TEN_MS_NANOSLEEP  10000000
  64
  65 /* tables set up based on cmdparse instructions */
  66
  67 /* add new options here */
  68 optionTbl_t longOptions[] = {
  69         {NULL, 0, 0, 0}
  70 };
  71
  72 /*
  73  * Add new subcommands here
  74  */
  75 subCommandProps_t subcommands[] = {
  76         {"start", it_enable, NULL, NULL, NULL, OPERAND_NONE, NULL},
  77         {"stop", it_disable, NULL, NULL, NULL, OPERAND_NONE, NULL},
  78         {NULL, 0, NULL, NULL, 0, NULL, 0, NULL}
  79 };
  80
  81 /* globals */
  82 char *cmdName;
  83
  84 /*
  85  * Opens the iSCSI Target Node
  86  *
  87  * fd - Return the iscsit file descriptor
  88  */
  89 static int
  90 it_open(int *fd)
  91 {
  92
  93         int ret = ITADM_SUCCESS;
  94
  95         *fd = open(ISCSIT_NODE, O_RDONLY);
  96         if (*fd < 0) {
  97                 if (errno == EPERM) {
  98                         (void) fprintf(stdout, "open failed: EPERM");
  99                         ret = ITADM_PERM;
 100                 } else {
 101                         (void) fprintf(stdout, "open failed: INVALID");
 102                         ret = ITADM_INVALID;
 103                 }
 104         }
 105
 106         return (ret);
 107 }
 108
 109 /*
 110  * Enables the iSCSI Target
 111  */
 112 /*ARGSUSED*/
 113 static int
 114 it_enable(int operandLen, char *operands[], cmdOptions_t *options,
 115     void *args)
 116 {
 117         int     ret;
 118         int     fd;
 119         char    buf[256];
 120         uint32_t *buflenp;
 121         char    *fqhnp;
 122         iscsit_hostinfo_t hostinfo;
 123
 124         (void) fprintf(stdout, "%s: %s\n", cmdName,
 125             gettext("Requesting to enable iscsi target"));
 126
 127         bzero(buf, 256);
 128         bzero(hostinfo.fqhn, sizeof (hostinfo.fqhn));
 129
 130         /* Open the iscsi target node */
 131         if ((ret = it_open(&fd)) != ITADM_SUCCESS) {
 132                 (void) fprintf(stdout, "Unable to open device %s", ISCSIT_NODE);
 133                 return (ret);
 134         }
 135
 136         (void) fprintf(stdout, "it_enable [fd=%d]\n", fd);
 137         /* enable the iscsi target */
 138         buflenp = (uint32_t *)((void *)&buf);
 139         *buflenp = strlen("target_name") + 1;
 140         (void) strncpy(buf + sizeof (uint32_t), "target_name",
 141             256 - sizeof (uint32_t));
 142
 143         fqhnp = &hostinfo.fqhn[0];
 144
 145         ret = sysinfo(SI_HOSTNAME, fqhnp, 256);
 146
 147         if ((ret != -1) && (ret < sizeof (hostinfo.fqhn))) {
 148                 fqhnp += ret;
 149                 hostinfo.length = ret;
 150                 hostinfo.fqhn[ret-1] = '.';
 151                 hostinfo.length += sysinfo(SI_SRPC_DOMAIN, fqhnp,
 152                     sizeof (hostinfo.fqhn) - ret);
 153         }
 154
 155         (void) fprintf(stdout, "it_enable: fqhn = '%s'\n", hostinfo.fqhn);
 156
 157         if ((ret = ioctl(fd, ISCSIT_IOC_ENABLE_SVC, &hostinfo)) != 0) {
 158                 (void) fprintf(stdout, "Unable to issue ioctl: %d", errno);
 159                 return (ret);
 160         }
 161         return (ITADM_SUCCESS);
 162 }
 163
 164
 165 /*
 166  * Disable the iSCSI target
 167  */
 168 /* ARGSUSED */
 169 static int
 170 it_disable(int operandLen, char *operands[], cmdOptions_t *options,
 171     void *args)
 172 {
 173         int     ret;
 174         int     fd;
 175
 176         (void) fprintf(stdout, "%s: %s\n", cmdName,
 177             gettext("Requesting to disable iscsi target"));
 178
 179         /* Open the iscsi target node */
 180         if ((ret = it_open(&fd)) != ITADM_SUCCESS) {
 181                 return (ret);
 182         }
 183
 184         /* disable the iSCSI target */
 185         if ((ret = ioctl(fd, ISCSIT_IOC_DISABLE_SVC, NULL)) != 0) {
 186                 return (ret);
 187         }
 188         return (ITADM_SUCCESS);
 189 }
 190
 191 /*
 192  * input:
 193  *  execFullName - exec name of program (argv[0])
 194  *
 195  *  copied from usr/src/cmd/zoneadm/zoneadm.c in OS/Net
 196  *  (changed name to lowerCamelCase to keep consistent with this file)
 197  *
 198  * Returns:
 199  *  command name portion of execFullName
 200  */
 201 static char *
 202 getExecBasename(char *execFullname)
 203 {
 204         char *lastSlash, *execBasename;
 205
 206         /* guard against '/' at end of command invocation */
 207         for (;;) {
 208                 lastSlash = strrchr(execFullname, '/');
 209                 if (lastSlash == NULL) {
 210                         execBasename = execFullname;
 211                         break;
 212                 } else {
 213                         execBasename = lastSlash + 1;
 214                         if (*execBasename == '\0') {
 215                                 *lastSlash = '\0';
 216                                 continue;
 217                         }
 218                         break;
 219                 }
 220         }
 221         return (execBasename);
 222 }
 223
 224 int
 225 main(int argc, char *argv[])
 226 {
 227         synTables_t synTables;
 228         char versionString[VERSION_STRING_MAX_LEN];
 229         int ret;
 230         int funcRet;
 231         void *subcommandArgs = NULL;
 232
 233         (void) setlocale(LC_ALL, "");
 234         /* set global command name */
 235         cmdName = getExecBasename(argv[0]);
 236
 237         (void) snprintf(versionString, VERSION_STRING_MAX_LEN, "%s.%s",
 238             VERSION_STRING_MAJOR, VERSION_STRING_MINOR);
 239         synTables.versionString = versionString;
 240         synTables.longOptionTbl = &longOptions[0];
 241         synTables.subCommandPropsTbl = &subcommands[0];
 242
 243         ret = cmdParse(argc, argv, synTables, subcommandArgs, &funcRet);
 244         if (ret != 0) {
 245                 return (ret);
 246         }
 247
 248         return (funcRet);
 249 } /* end main */