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 "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 const field_t   agfl_crc_hfld[] = { {
  45         "", FLDT_AGFL_CRC, OI(0), C1, 0, TYP_NONE, },
  46         { NULL }
  47 };
  48
  49 #define OFF(f)  bitize(offsetof(xfs_agfl_t, agfl_ ## f))
  50 const field_t   agfl_flds[] = {
  51         { "bno", FLDT_AGBLOCKNZ, OI(OFF(magicnum)), agfl_bno_size,
  52           FLD_ARRAY|FLD_COUNT, TYP_DATA },
  53         { NULL }
  54 };
  55
  56 const field_t   agfl_crc_flds[] = {
  57         { "magicnum", FLDT_UINT32X, OI(OFF(magicnum)), C1, 0, TYP_NONE },
  58         { "seqno", FLDT_AGNUMBER, OI(OFF(seqno)), C1, 0, TYP_NONE },
  59         { "uuid", FLDT_UUID, OI(OFF(uuid)), C1, 0, TYP_NONE },
  60         { "lsn", FLDT_UINT64X, OI(OFF(lsn)), C1, 0, TYP_NONE },
  61         { "crc", FLDT_CRC, OI(OFF(crc)), C1, 0, TYP_NONE },
  62         { "bno", FLDT_AGBLOCKNZ, OI(OFF(bno)), agfl_bno_size,
  63           FLD_ARRAY|FLD_COUNT, TYP_DATA },
  64         { NULL }
  65 };
  66
  67 static int
  68 agfl_bno_size(
  69         void    *obj,
  70         int     startoff)
  71 {
  72         return XFS_AGFL_SIZE(mp);
  73 }
  74
  75 static void
  76 agfl_help(void)
  77 {
  78         dbprintf(_(
  79 "\n"
  80 " set allocation group freelist\n"
  81 "\n"
  82 " Example:\n"
  83 "\n"
  84 " agfl 5"
  85 "\n"
  86 " Located in the fourth sector of each allocation group,\n"
  87 " the agfl freelist for internal btree space allocation is maintained\n"
  88 " for each allocation group.  This acts as a reserved pool of space\n"
  89 " separate from the general filesystem freespace (not used for user data).\n"
  90 "\n"
  91 ));
  92
  93 }
  94
  95 static int
  96 agfl_f(
  97         int             argc,
  98         char            **argv)
  99 {
 100         xfs_agnumber_t  agno;
 101         char            *p;
 102
 103         if (argc > 1) {
 104                 agno = (xfs_agnumber_t)strtoul(argv[1], &p, 0);
 105                 if (*p != '\0' || agno >= mp->m_sb.sb_agcount) {
 106                         dbprintf(_("bad allocation group number %s\n"), argv[1]);
 107                         return 0;
 108                 }
 109                 cur_agno = agno;
 110         } else if (cur_agno == NULLAGNUMBER)
 111                 cur_agno = 0;
 112         ASSERT(typtab[TYP_AGFL].typnm == TYP_AGFL);
 113         set_cur(&typtab[TYP_AGFL],
 114                 XFS_AG_DADDR(mp, cur_agno, XFS_AGFL_DADDR(mp)),
 115                 XFS_FSS_TO_BB(mp, 1), DB_RING_ADD, NULL);
 116         return 0;
 117 }
 118
 119 void
 120 agfl_init(void)
 121 {
 122         add_command(&agfl_cmd);
 123 }
 124
 125 /*ARGSUSED*/
 126 int
 127 agfl_size(
 128         void    *obj,
 129         int     startoff,
 130         int     idx)
 131 {
 132         return bitize(mp->m_sb.sb_sectsize);
 133 }