usr/src/lib/libpkg/common/handlelocalfs.c

   1 /*
   2  *
   3  * CDDL HEADER START
   4  *
   5  * The contents of this file are subject to the terms of the
   6  * Common Development and Distribution License (the "License").
   7  * You may not use this file except in compliance with the License.
   8  *
   9  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
  10  * or http://www.opensolaris.org/os/licensing.
  11  * See the License for the specific language governing permissions
  12  * and limitations under the License.
  13  *
  14  * When distributing Covered Code, include this CDDL HEADER in each
  15  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  16  * If applicable, add the following below this CDDL HEADER, with the
  17  * fields enclosed by brackets "[]" replaced with your own identifying
  18  * information: Portions Copyright [yyyy] [name of copyright owner]
  19  *
  20  * CDDL HEADER END
  21  *
  22  */
  23
  24 /*
  25  * Copyright 2009 Sun Microsystems, Inc.  All rights reserved.
  26  * Use is subject to license terms.
  27  *
  28 */
  29
  30
  31 #include <stdlib.h>
  32 #include <unistd.h>
  33 #include <strings.h>
  34 #include <libscf.h>
  35
  36 #define MAX_TRY 15
  37 static boolean_t fs_temporarily_enabled = B_FALSE;
  38 char svm_core_svcs[] = "system/filesystem/local:default";
  39
  40 /*
  41  * Name:        enable_local_fs
  42  * Description: If the SMF service system/filesystem/local:default is not
  43  *              enabled, then this function enables the service, so that,
  44  *              all the local filesystems are mounted.
  45  * Arguments:   None
  46  * Returns:     B_TRUE on success; B_FALSE on error.
  47  */
  48 boolean_t
  49 enable_local_fs(void)
  50 {
  51         char *cur_smf_state;
  52         int i;
  53         boolean_t fs_enabled_here = B_FALSE;
  54
  55         if (fs_temporarily_enabled)  {
  56                 return (B_TRUE);
  57         }
  58
  59         if ((cur_smf_state = smf_get_state(svm_core_svcs)) != NULL) {
  60                 if (strcmp(cur_smf_state, SCF_STATE_STRING_DISABLED) == 0) {
  61                         if (smf_enable_instance(svm_core_svcs, SMF_TEMPORARY)
  62                                 != 0) {
  63                                 free(cur_smf_state);
  64                                 return (B_FALSE);
  65                         }
  66
  67                         fs_enabled_here = B_TRUE;
  68
  69                 } else if (strcmp(cur_smf_state, SCF_STATE_STRING_ONLINE)
  70                                 == 0) {
  71                         free(cur_smf_state);
  72                         return (B_TRUE);
  73                 } else if (strcmp(cur_smf_state, SCF_STATE_STRING_OFFLINE)
  74                                 != 0) {
  75                         free(cur_smf_state);
  76                         return (B_FALSE);
  77                 }
  78
  79                 free(cur_smf_state);
  80
  81         } else {
  82                 return (B_FALSE);
  83         }
  84
  85         for (i = 0; i < MAX_TRY; i++) {
  86                 if ((cur_smf_state = smf_get_state(svm_core_svcs)) != NULL) {
  87                         if (strcmp(cur_smf_state, SCF_STATE_STRING_ONLINE)
  88                                 == 0) {
  89                                 free(cur_smf_state);
  90                                 if (fs_enabled_here) {
  91                                         fs_temporarily_enabled = B_TRUE;
  92                                 }
  93                                 return (B_TRUE);
  94                         } else if ((strcmp(cur_smf_state,
  95                                 SCF_STATE_STRING_OFFLINE) == 0) ||
  96                 (strcmp(cur_smf_state, SCF_STATE_STRING_DISABLED) == 0)) {
  97                                 (void) sleep(1);
  98                                 free(cur_smf_state);
  99                         } else {
 100                                 free(cur_smf_state);
 101                                 return (B_FALSE);
 102                         }
 103                 } else {
 104                         return (B_FALSE);
 105                 }
 106         }
 107
 108         return (B_FALSE);
 109 }
 110
 111 /*
 112  * Name:        restore_local_fs
 113  * Description: If the SMF service system/filesystem/local:default was
 114  *              enabled using enable_local_fs(), then this function disables
 115  *              the service.
 116  * Arguments:   None
 117  * Returns:     B_TRUE on success; B_FALSE on error.
 118  */
 119 boolean_t
 120 restore_local_fs(void)
 121 {
 122         int i;
 123         char *cur_smf_state;
 124
 125         if (!fs_temporarily_enabled) {
 126                 return (B_TRUE);
 127         }
 128
 129         if (smf_disable_instance(svm_core_svcs, SMF_TEMPORARY) != 0) {
 130                 return (B_FALSE);
 131         }
 132
 133         for (i = 0; i < MAX_TRY; i++) {
 134                 if ((cur_smf_state = smf_get_state(svm_core_svcs)) != NULL) {
 135                         if (strcmp(cur_smf_state, SCF_STATE_STRING_DISABLED)
 136                                 == 0) {
 137                                 fs_temporarily_enabled = B_FALSE;
 138                                 free(cur_smf_state);
 139                                 break;
 140                         }
 141                         (void) sleep(1);
 142
 143                         free(cur_smf_state);
 144                 } else {
 145                         return (B_FALSE);
 146                 }
 147         }
 148
 149         return (!fs_temporarily_enabled);
 150 }