liblvm/lvm_base.c

   1 /*
   2  * Copyright (C) 2008,2009 Red Hat, Inc. All rights reserved.
   3  *
   4  * This file is part of LVM2.
   5  *
   6  * This copyrighted material is made available to anyone wishing to use,
   7  * modify, copy, or redistribute it subject to the terms and conditions
   8  * of the GNU Lesser General Public License v.2.1.
   9  *
  10  * You should have received a copy of the GNU Lesser General Public License
  11  * along with this program; if not, write to the Free Software Foundation,
  12  * Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  13  */
  14
  15 #include "lib.h"
  16 #include "toolcontext.h"
  17 #include "locking.h"
  18 #include "lvm-version.h"
  19 #include "metadata-exported.h"
  20 #include "lvm2app.h"
  21
  22 const char *lvm_library_get_version(void)
  23 {
  24         return LVM_VERSION;
  25 }
  26
  27 lvm_t lvm_init(const char *system_dir)
  28 {
  29         struct cmd_context *cmd;
  30
  31         /* FIXME: logging bound to handle
  32          */
  33
  34         if (!udev_init_library_context())
  35                 stack;
  36
  37         /* create context */
  38         /* FIXME: split create_toolcontext */
  39         /* FIXME: make all globals configurable */
  40         cmd = create_toolcontext(0, system_dir, 1, 0);
  41         if (!cmd)
  42                 return NULL;
  43
  44         if (stored_errno())
  45                 return (lvm_t) cmd;
  46
  47         /*
  48          * FIXME: if an non memory error occured, return the cmd (maybe some
  49          * cleanup needed).
  50          */
  51
  52         /* initialization from lvm_run_command */
  53         init_error_message_produced(0);
  54
  55         /* FIXME: locking_type config option needed? */
  56         /* initialize locking */
  57         if (!init_locking(-1, cmd, 0)) {
  58                 /* FIXME: use EAGAIN as error code here */
  59                 lvm_quit((lvm_t) cmd);
  60                 return NULL;
  61         }
  62         /*
  63          * FIXME: Use cmd->cmd_line as audit trail for liblvm calls.  Used in
  64          * archive() call.  Possible example:
  65          * cmd_line = "lvm_vg_create: vg1\nlvm_vg_extend vg1 /dev/sda1\n"
  66          */
  67         cmd->cmd_line = "liblvm";
  68
  69         return (lvm_t) cmd;
  70 }
  71
  72 void lvm_quit(lvm_t libh)
  73 {
  74         destroy_toolcontext((struct cmd_context *)libh);
  75         udev_fin_library_context();
  76 }
  77
  78 int lvm_config_reload(lvm_t libh)
  79 {
  80         /* FIXME: re-init locking needed here? */
  81         if (!refresh_toolcontext((struct cmd_context *)libh))
  82                 return -1;
  83         return 0;
  84 }
  85
  86 /*
  87  * FIXME: submit a patch to document the --config option
  88  */
  89 int lvm_config_override(lvm_t libh, const char *config_settings)
  90 {
  91         struct cmd_context *cmd = (struct cmd_context *)libh;
  92         if (override_config_tree_from_string(cmd, config_settings))
  93                 return -1;
  94         return 0;
  95 }
  96
  97 int lvm_config_find_bool(lvm_t libh, const char *config_path, int fail)
  98 {
  99         return find_config_tree_bool((struct cmd_context *)libh, config_path, fail);
 100 }
 101
 102 int lvm_errno(lvm_t libh)
 103 {
 104         return stored_errno();
 105 }
 106
 107 const char *lvm_errmsg(lvm_t libh)
 108 {
 109         return stored_errmsg();
 110 }
 111
 112 const char *lvm_vgname_from_pvid(lvm_t libh, const char *pvid)
 113 {
 114         struct cmd_context *cmd = (struct cmd_context *)libh;
 115         struct id id;
 116
 117         if (!id_read_format(&id, pvid)) {
 118                 log_error(INTERNAL_ERROR "Unable to convert uuid");
 119                 return NULL;
 120         }
 121         return find_vgname_from_pvid(cmd, (char *)id.uuid);
 122 }
 123
 124 const char *lvm_vgname_from_device(lvm_t libh, const char *device)
 125 {
 126         struct cmd_context *cmd = (struct cmd_context *)libh;
 127         return find_vgname_from_pvname(cmd, device);
 128 }