usr/src/lib/lvm/libmeta/common/meta_patch_root.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 2006 Sun Microsystems, Inc.  All rights reserved.
  23  * Use is subject to license terms.
  24  */
  25
  26 #pragma ident   "%Z%%M% %I%     %E% SMI"
  27
  28 /*
  29  * patch /etc/system file for the root device
  30  */
  31
  32 #include <dlfcn.h>
  33 #include <meta.h>
  34
  35
  36 /*
  37  * set root device name in md.conf and vfstab, patch in mddb locations
  38  */
  39 int
  40 meta_patch_rootdev(
  41         mdname_t        *rootnp,        /* root device */
  42         char            *sname,         /* system file name */
  43         char            *vname,         /* vfstab file name */
  44         char            *cname,         /* mddb.cf file name */
  45         char            *dbname,        /* md.conf file name */
  46         int             doit,           /* really patch files */
  47         int             verbose,        /* show what we're doing */
  48         md_error_t      *ep             /* returned error */
  49 )
  50 {
  51         mdsetname_t     *sp;
  52         int             ismeta = metaismeta(rootnp);
  53         char            *tsname = NULL;
  54         FILE            *tsfp = NULL;
  55         char            *dbtname = NULL;
  56         FILE            *dbtfp = NULL;
  57         char            *tvname = NULL;
  58         int             rval = -1;
  59
  60         /* check names */
  61         if (sname == NULL)
  62                 sname = "/etc/system";
  63         if (vname == NULL)
  64                 vname = "/etc/vfstab";
  65         if (cname == NULL)
  66                 cname = META_DBCONF;
  67         if (dbname == NULL)
  68                 dbname = "/kernel/drv/md.conf";
  69
  70         /* make sure we have a local name */
  71         if ((sp = metagetset(rootnp, TRUE, ep)) == NULL)
  72                 return (-1);
  73
  74         if (! metaislocalset(sp)) {
  75                 return (mddeverror(ep, MDE_NOT_LOCAL, rootnp->dev,
  76                     rootnp->cname));
  77         }
  78
  79         /* replace forceload and rootdev lines in system */
  80         if (meta_systemfile_copy(sname, 1, 0, doit, verbose, &tsname, &tsfp,
  81             ep) != 0) {
  82                 goto out;
  83         }
  84         if (meta_systemfile_append_mdroot(rootnp, sname,
  85             tsname, tsfp, ismeta, doit, verbose, ep) != 0) {
  86                 goto out;
  87         }
  88
  89         /* replace bootlist lines in /kernel/drv/md.conf */
  90         if (meta_systemfile_copy(dbname, 0, 1, doit, verbose, &dbtname,
  91             &dbtfp, ep) != 0) {
  92                 goto out;
  93         }
  94         if (meta_systemfile_append_mddb(cname, dbname, dbtname, dbtfp, doit,
  95             verbose, 1, ep) != 0) {
  96                 goto out;
  97         }
  98
  99         /* force the file contents out to disk */
 100         if (doit) {
 101                 if ((fflush(tsfp) != 0) ||
 102                     (fsync(fileno(tsfp)) != 0) ||
 103                     (fclose(tsfp) != 0)) {
 104                         (void) mdsyserror(ep, errno, tsname);
 105                         goto out;
 106                 }
 107                 tsfp = NULL;
 108                 if ((fflush(dbtfp) != 0) ||
 109                     (fsync(fileno(dbtfp)) != 0) ||
 110                     (fclose(dbtfp) != 0)) {
 111                         (void) mdsyserror(ep, errno, dbtname);
 112                         goto out;
 113                 }
 114                 dbtfp = NULL;
 115         }
 116
 117         /* replace lines in vfstab */
 118         if (meta_patch_vfstab("/", rootnp, vname, NULL, doit, verbose, &tvname,
 119             ep) != 0) {
 120                 goto out;
 121         }
 122
 123         /* rename files, better hope both work */
 124         if (doit) {
 125                 if (rename(tsname, sname) != 0) {
 126                         (void) mdsyserror(ep, errno, sname);
 127                         goto out;
 128                 }
 129                 Free(tsname);
 130                 tsname = NULL;
 131                 if (rename(dbtname, dbname) != 0) {
 132                         (void) mdsyserror(ep, errno, dbname);
 133                         goto out;
 134                 }
 135                 Free(dbtname);
 136                 dbtname = NULL;
 137                 if (rename(tvname, vname) != 0) {
 138                         (void) mdsyserror(ep, errno, vname);
 139                         goto out;
 140                 }
 141                 Free(tvname);
 142                 tvname = NULL;
 143         }
 144         rval = 0;
 145
 146         /* cleanup, return error */
 147 out:
 148         if (tsfp != NULL)
 149                 (void) fclose(tsfp);
 150         if (tsname != NULL) {
 151                 if (doit)
 152                         (void) unlink(tsname);
 153                 Free(tsname);
 154         }
 155         if (tvname != NULL) {
 156                 if (doit)
 157                         (void) unlink(tvname);
 158                 Free(tvname);
 159         }
 160
 161         /* free the temporary files for md.conf */
 162         if (dbtfp != NULL)
 163                 (void) fclose(dbtfp);
 164         if (dbtname != NULL) {
 165                 if (doit)
 166                         (void) unlink(dbtname);
 167                 Free(dbtname);
 168         }
 169         return (rval);
 170 }