external/gpl2/lvm2/dist/liblvm/lvm_lv.c

   1 /*      $NetBSD$        */
   2
   3 /*
   4  * Copyright (C) 2008,2009 Red Hat, Inc. All rights reserved.
   5  *
   6  * This file is part of LVM2.
   7  *
   8  * This copyrighted material is made available to anyone wishing to use,
   9  * modify, copy, or redistribute it subject to the terms and conditions
  10  * of the GNU Lesser General Public License v.2.1.
  11  *
  12  * You should have received a copy of the GNU Lesser General Public License
  13  * along with this program; if not, write to the Free Software Foundation,
  14  * Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  15  */
  16
  17 #include "lib.h"
  18 #include "lvm2app.h"
  19 #include "metadata-exported.h"
  20 #include "lvm-string.h"
  21 #include "defaults.h"
  22 #include "segtype.h"
  23 #include "locking.h"
  24 #include "activate.h"
  25
  26 #include <string.h>
  27
  28 /* FIXME: have lib/report/report.c _disp function call lv_size()? */
  29 uint64_t lvm_lv_get_size(const lv_t lv)
  30 {
  31         return lv_size(lv);
  32 }
  33
  34 char *lvm_lv_get_uuid(const lv_t lv)
  35 {
  36         char uuid[64] __attribute((aligned(8)));
  37
  38         if (!id_write_format(&lv->lvid.id[1], uuid, sizeof(uuid))) {
  39                 log_error("Internal error converting uuid");
  40                 return NULL;
  41         }
  42         return strndup((const char *)uuid, 64);
  43 }
  44
  45 char *lvm_lv_get_name(const lv_t lv)
  46 {
  47         char *name;
  48
  49         name = dm_malloc(NAME_LEN + 1);
  50         strncpy(name, (const char *)lv->name, NAME_LEN);
  51         name[NAME_LEN] = '\0';
  52         return name;
  53 }
  54
  55 uint64_t lvm_lv_is_active(const lv_t lv)
  56 {
  57         struct lvinfo info;
  58         if (lv_info(lv->vg->cmd, lv, &info, 1, 0) &&
  59             info.exists && info.live_table)
  60                 return 1;
  61         return 0;
  62 }
  63
  64 uint64_t lvm_lv_is_suspended(const lv_t lv)
  65 {
  66         struct lvinfo info;
  67         if (lv_info(lv->vg->cmd, lv, &info, 1, 0) &&
  68             info.exists && info.suspended)
  69                 return 1;
  70         return 0;
  71 }
  72
  73 /* Set defaults for non-segment specific LV parameters */
  74 static void _lv_set_default_params(struct lvcreate_params *lp,
  75                                    vg_t vg, const char *lvname,
  76                                    uint64_t extents)
  77 {
  78         lp->zero = 1;
  79         lp->major = -1;
  80         lp->minor = -1;
  81         lp->vg_name = vg->name;
  82         lp->lv_name = lvname; /* FIXME: check this for safety */
  83         lp->pvh = &vg->pvs;
  84
  85         lp->extents = extents;
  86         lp->permission = LVM_READ | LVM_WRITE;
  87         lp->read_ahead = DM_READ_AHEAD_NONE;
  88         lp->alloc = ALLOC_INHERIT;
  89         lp->tag = NULL;
  90 }
  91
  92 /* Set default for linear segment specific LV parameters */
  93 static void _lv_set_default_linear_params(struct cmd_context *cmd,
  94                                           struct lvcreate_params *lp)
  95 {
  96         lp->segtype = get_segtype_from_string(cmd, "striped");
  97         lp->stripes = 1;
  98         lp->stripe_size = DEFAULT_STRIPESIZE * 2;
  99 }
 100
 101 /*
 102  * FIXME: This function should probably not commit to disk but require calling
 103  * lvm_vg_write.  However, this appears to be non-trivial change until
 104  * lv_create_single is refactored by segtype.
 105  */
 106 lv_t lvm_vg_create_lv_linear(vg_t vg, const char *name, uint64_t size)
 107 {
 108         struct lvcreate_params lp;
 109         uint64_t extents;
 110         struct lv_list *lvl;
 111
 112         if (vg_read_error(vg))
 113                 return NULL;
 114         if (!vg_check_write_mode(vg))
 115                 return NULL;
 116         memset(&lp, 0, sizeof(lp));
 117         extents = extents_from_size(vg->cmd, size, vg->extent_size);
 118         _lv_set_default_params(&lp, vg, name, extents);
 119         _lv_set_default_linear_params(vg->cmd, &lp);
 120         if (!lv_create_single(vg, &lp))
 121                 return NULL;
 122         lvl = find_lv_in_vg(vg, name);
 123         if (!lvl)
 124                 return NULL;
 125         return (lv_t) lvl->lv;
 126 }
 127
 128 /*
 129  * FIXME: This function should probably not commit to disk but require calling
 130  * lvm_vg_write.
 131  */
 132 int lvm_vg_remove_lv(lv_t lv)
 133 {
 134         if (!lv || !lv->vg || vg_read_error(lv->vg))
 135                 return -1;
 136         if (!vg_check_write_mode(lv->vg))
 137                 return -1;
 138         if (!lv_remove_single(lv->vg->cmd, lv, DONT_PROMPT))
 139                 return -1;
 140         return 0;
 141 }
 142
 143 int lvm_lv_activate(lv_t lv)
 144 {
 145         if (!lv || !lv->vg || vg_read_error(lv->vg) || !lv->vg->cmd)
 146                 return -1;
 147
 148         /* FIXME: handle pvmove stuff later */
 149         if (lv->status & LOCKED) {
 150                 log_error("Unable to activate locked LV");
 151                 return -1;
 152         }
 153
 154         /* FIXME: handle lvconvert stuff later */
 155         if (lv->status & CONVERTING) {
 156                 log_error("Unable to activate LV with in-progress lvconvert");
 157                 return -1;
 158         }
 159
 160         if (lv_is_origin(lv)) {
 161                 log_verbose("Activating logical volume \"%s\" "
 162                             "exclusively", lv->name);
 163                 if (!activate_lv_excl(lv->vg->cmd, lv)) {
 164                         log_error("Activate exclusive failed.");
 165                         return -1;
 166                 }
 167         } else {
 168                 log_verbose("Activating logical volume \"%s\"",
 169                             lv->name);
 170                 if (!activate_lv(lv->vg->cmd, lv)) {
 171                         log_error("Activate failed.");
 172                         return -1;
 173                 }
 174         }
 175         return 0;
 176 }
 177
 178 int lvm_lv_deactivate(lv_t lv)
 179 {
 180         if (!lv || !lv->vg || vg_read_error(lv->vg) || !lv->vg->cmd)
 181                 return -1;
 182
 183         log_verbose("Deactivating logical volume \"%s\"", lv->name);
 184         if (!deactivate_lv(lv->vg->cmd, lv)) {
 185                 log_error("Deactivate failed.");
 186                 return -1;
 187         }
 188         return 0;
 189 }
 190
 191 int lvm_lv_resize(const lv_t lv, uint64_t new_size)
 192 {
 193         /* FIXME: add lv resize code here */
 194         log_error("NOT IMPLEMENTED YET");
 195         return -1;
 196 }