db/agfl.c

   1 /*
   2  * Copyright (c) 2000-2001,2005 Silicon Graphics, Inc.
   3  * All Rights Reserved.
   4  *
   5  * This program is free software; you can redistribute it and/or
   6  * modify it under the terms of the GNU General Public License as
   7  * published by the Free Software Foundation.
   8  *
   9  * This program is distributed in the hope that it would be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License
  15  * along with this program; if not, write the Free Software Foundation,
  16  * Inc.,  51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
  17  */
  18
  19 #include <xfs/libxfs.h>
  20 #include "command.h"
  21 #include "type.h"
  22 #include "faddr.h"
  23 #include "fprint.h"
  24 #include "field.h"
  25 #include "io.h"
  26 #include "bit.h"
  27 #include "output.h"
  28 #include "init.h"
  29 #include "agfl.h"
  30
  31 static int agfl_bno_size(void *obj, int startoff);
  32 static int agfl_f(int argc, char **argv);
  33 static void agfl_help(void);
  34
  35 static const cmdinfo_t agfl_cmd =
  36         { "agfl", NULL, agfl_f, 0, 1, 1, N_("[agno]"),
  37           N_("set address to agfl block"), agfl_help };
  38
  39 const field_t   agfl_hfld[] = { {
  40         "", FLDT_AGFL, OI(0), C1, 0, TYP_NONE, },
  41         { NULL }
  42 };
  43
  44 #define OFF(f)  bitize(offsetof(xfs_agfl_t, agfl_ ## f))
  45 const field_t   agfl_flds[] = {
  46         { "bno", FLDT_AGBLOCKNZ, OI(OFF(bno)), agfl_bno_size,
  47           FLD_ARRAY|FLD_COUNT, TYP_DATA },
  48         { NULL }
  49 };
  50
  51 static int
  52 agfl_bno_size(
  53         void    *obj,
  54         int     startoff)
  55 {
  56         return XFS_AGFL_SIZE(mp);
  57 }
  58
  59 static void
  60 agfl_help(void)
  61 {
  62         dbprintf(_(
  63 "\n"
  64 " set allocation group freelist\n"
  65 "\n"
  66 " Example:\n"
  67 "\n"
  68 " agfl 5"
  69 "\n"
  70 " Located in the fourth sector of each allocation group,\n"
  71 " the agfl freelist for internal btree space allocation is maintained\n"
  72 " for each allocation group.  This acts as a reserved pool of space\n"
  73 " separate from the general filesystem freespace (not used for user data).\n"
  74 "\n"
  75 ));
  76
  77 }
  78
  79 static int
  80 agfl_f(
  81         int             argc,
  82         char            **argv)
  83 {
  84         xfs_agnumber_t  agno;
  85         char            *p;
  86
  87         if (argc > 1) {
  88                 agno = (xfs_agnumber_t)strtoul(argv[1], &p, 0);
  89                 if (*p != '\0' || agno >= mp->m_sb.sb_agcount) {
  90                         dbprintf(_("bad allocation group number %s\n"), argv[1]);
  91                         return 0;
  92                 }
  93                 cur_agno = agno;
  94         } else if (cur_agno == NULLAGNUMBER)
  95                 cur_agno = 0;
  96         ASSERT(typtab[TYP_AGFL].typnm == TYP_AGFL);
  97         set_cur(&typtab[TYP_AGFL],
  98                 XFS_AG_DADDR(mp, cur_agno, XFS_AGFL_DADDR(mp)),
  99                 XFS_FSS_TO_BB(mp, 1), DB_RING_ADD, NULL);
 100         return 0;
 101 }
 102
 103 void
 104 agfl_init(void)
 105 {
 106         add_command(&agfl_cmd);
 107 }
 108
 109 /*ARGSUSED*/
 110 int
 111 agfl_size(
 112         void    *obj,
 113         int     startoff,
 114         int     idx)
 115 {
 116         return bitize(mp->m_sb.sb_sectsize);
 117 }