Branch data     Line data    Source code

       1                 :            : /*
       2                 :            :  * Copyright (C) 2001-2004 Sistina Software, Inc. All rights reserved.
       3                 :            :  * Copyright (C) 2004-2006 Red Hat, Inc. All rights reserved.
       4                 :            :  *
       5                 :            :  * This file is part of LVM2.
       6                 :            :  *
       7                 :            :  * This copyrighted material is made available to anyone wishing to use,
       8                 :            :  * modify, copy, or redistribute it subject to the terms and conditions
       9                 :            :  * of the GNU Lesser General Public License v.2.1.
      10                 :            :  *
      11                 :            :  * You should have received a copy of the GNU Lesser General Public License
      12                 :            :  * along with this program; if not, write to the Free Software Foundation,
      13                 :            :  * Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
      14                 :            :  */
      15                 :            : 
      16                 :            : #include "lib.h"
      17                 :            : #include "disk-rep.h"
      18                 :            : 
      19                 :            : /*
      20                 :            :  * FIXME: Quick hack.  We can use caching to
      21                 :            :  * prevent a total re-read, even so vg_number
      22                 :            :  * causes the tools to check *every* pv.  Yuck.
      23                 :            :  * Put in separate file so it wouldn't contaminate
      24                 :            :  * other code.
      25                 :            :  */
      26                 :          0 : int get_free_vg_number(struct format_instance *fid, struct dev_filter *filter,
      27                 :            :                        const char *candidate_vg, int *result)
      28                 :            : {
      29                 :            :         struct dm_list all_pvs;
      30                 :            :         struct disk_list *dl;
      31                 :          0 :         struct dm_pool *mem = dm_pool_create("lvm1 vg_number", 10 * 1024);
      32                 :          0 :         int numbers[MAX_VG], i, r = 0;
      33                 :            : 
      34                 :          0 :         dm_list_init(&all_pvs);
      35                 :            : 
      36         [ #  # ]:          0 :         if (!mem)
      37                 :          0 :                 return_0;
      38                 :            : 
      39         [ #  # ]:          0 :         if (!read_pvs_in_vg(fid->fmt, NULL, filter, mem, &all_pvs))
      40                 :          0 :                 goto_out;
      41                 :            : 
      42                 :          0 :         memset(numbers, 0, sizeof(numbers));
      43                 :            : 
      44         [ #  # ]:          0 :         dm_list_iterate_items(dl, &all_pvs) {
      45 [ #  # ][ #  # ]:          0 :                 if (!*dl->pvd.vg_name || !strcmp((char *)dl->pvd.vg_name, candidate_vg))
      46                 :          0 :                         continue;
      47                 :            : 
      48                 :          0 :                 numbers[dl->vgd.vg_number] = 1;
      49                 :            :         }
      50                 :            : 
      51         [ #  # ]:          0 :         for (i = 0; i < MAX_VG; i++) {
      52         [ #  # ]:          0 :                 if (!numbers[i]) {
      53                 :          0 :                         r = 1;
      54                 :          0 :                         *result = i;
      55                 :          0 :                         break;
      56                 :            :                 }
      57                 :            :         }
      58                 :            : 
      59                 :            :       out:
      60                 :          0 :         dm_pool_destroy(mem);
      61                 :          0 :         return r;
      62                 :            : }